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appliance repair

Samsung’s T9000 Refrigerator Features Wi-Fi, Evernote

TORONTO (Reuters) – Refrigerators are getting smart. A new model released earlier this month runs apps to help users browse recipes, create shopping lists and manage the expiration dates of items like yogurt and milk.

The T9000 refrigerator by electronics company Samsung has a 10-inch Wi-Fi-enabled touchscreen and includes apps such as Epicurious for recipes and Evernote for note-taking.

“The fridge, because it’s the hub of the family and the kitchen, is now another access point without having to drag around your tablet or have your phone with you in the vicinity of where you’re cooking or entertaining,” said Warner Doell, a vice president in the home appliance division at Samsung Canada.

The display enables users to keep up with the news, weather and even Twitter from the fridge door. It can also replace hand-written calendars with Google Calendar integration, and run slideshows of photos, according to Doell.

Shopping lists can be created on the fridge with the Evernote app, which will sync to smartphones and recipes can be found at Epicurious.

“You can say, ‘I have these ingredients in the fridge — what can I make?’ and it will show you recipes that you can prepare,” said Doell.

For people who have trouble keeping track of expiration dates of food items, there’s an app for that, too.

But with smartphones and tablets are already ubiquitous in homes, does the smart refrigerator offer more than novelty?

“I get asked a lot why do you need a screen on a refrigerator? And it’s a good question because we’re inundated with technology today,” said Doell.

The main reasons, he explained, are ease-of-use in managing settings, such as the refrigerators’ temperature, and for convenience because consumers are demanding pervasive connectiv

http://www.huffingtonpost.com/2013/01/22/t9000-refrigerator_n_2521191.html

Washing machine

From Wikipedia, the free encyclopedia

This article is about the laundry-cleaning apparatus. For the Sonic Youth album, see Washing Machine (album).

Not to be confused with Dishwasher.

A typical front-loader washing machine

A washing machine (laundry machine, clothes washer, or washer) is a machine used to wash laundry, such as clothing and sheets. The term is mostly applied to machines that use water as opposed to dry cleaning (which uses alternative cleaning fluids, and is performed by specialist businesses) or ultrasonic cleaners.

Contents

1 Washing by hand

2 Washing by machine

3 Wringing by machine

4 Combined processes

5 Milestones

5.1 Early machines

5.2 Automatic Machines

5.3 World War II and after

5.4 Modern washers

6 Production by country

6.1 Top-loading

6.2 Front-loading

6.3 Variant and hybrid designs

6.4 Comparison

7 Wash cycles

7.1 Washing

7.2 Rinsing

7.3 Spinning

7.4 Maintenance wash

8 Efficiency and standards

8.1 Europe

8.2 United States

9 Commercial use

9.1 Laundromat machines

9.2 Industrial washers

10 Social impact

11 Environmental impact

12 Manufacturers and brands

13 See also

14 References

15 External links

Washing by hand

File:Rhof-histWaschmaschine.oggPlay media

Irreler Bauerntradition shows an early Miele washing machine at the Roscheider Hof Open Air Museum

Laundering by hand involves soaking, beating, scrubbing, and rinsing dirty textiles. Before indoor plumbing, the housewife also had to carry all the water used for washing, boiling, and rinsing the laundry; according to an 1886 calculation, women fetched water eight to ten times every day from a pump, well, or spring.[1] Water for the laundry would be hand carried, heated on a fire for washing, then poured into the tub. That made the warm soapy water precious; it would be reused, first to wash the least soiled clothing, then to wash progressively dirtier laundry.

Removal of soap and water from the clothing after washing was originally a separate process. First, soap would be rinsed out with clear water. After rinsing, the soaking wet clothing would be formed into a roll and twisted by hand to extract water. The entire process often occupied an entire day of hard work, plus drying and ironing.

Washing by machine

1930 electric wringer/mangle washing machine.

Clothes washer technology developed as a way to reduce the manual labor spent, providing an open basin or sealed container with paddles or fingers to automatically agitate the clothing. The earliest machines were hand-operated and constructed from wood, while later machines made of metal permitted a fire to burn below the washtub, keeping the water warm throughout the day’s washing.

The earliest special-purpose mechanical washing device was the washboard, invented in 1797 by Nathaniel Briggs of New Hampshire.[2][3]

By the mid-1850s steam-driven commercial laundry machinery were on sale in the UK and US.[4] Technological advances in machinery for commercial and institutional washers proceeded faster than domestic washer design for several decades, especially in the UK. In the United States there was more emphasis on developing machines for washing at home, though machines for commercial laundry services were widely used in the late 19th and early 20th centuries.[5] The rotary washing machine was patented by Hamilton Smith in 1858.[3] As electricity was not commonly available until at least 1930, some early washing machines were operated by a low-speed, single-cylinder hit-and-miss gasoline engine.

Wringing by machine

After the items were washed and rinsed, water had to be removed by twisting. To help reduce this labor, the wringer/mangle machine was developed.

The mangle used two rollers under spring tension to squeeze water out of clothing and household linen. Each laundry item would be fed through the wringer separately. The first wringers were hand-cranked, but were eventually included as a powered attachment above the washer tub. The wringer would be swung over the wash tub so that extracted wash water would fall back into the tub to be reused for the next load. As implied by the term “mangle,” these early machines were quite dangerous, especially if powered and not hand-driven. A user’s fingers, hand, arm, or hair could become entangled in the laundry being squeezed, resulting in horrific injuries; unwary bystanders, such as children, could also be caught and hurt. Safer mechanisms were developed over time, and the more hazardous designs were eventually outlawed.

The modern process of water removal by spinning did not come into use until electric motors were developed. Spinning requires a constant high-speed power source, and was originally done in a separate device known as an “extractor”. A load of washed laundry would be transferred from the wash tub to the extractor basket, and the water spun out in a separate operation.[6][7] These early extractors were often dangerous to use, since unevenly distributed loads would cause the machine to shake violently. Many efforts were made to counteract the shaking of unstable loads, such as mounting the spinning basket on a free-floating shock-absorbing frame to absorb minor imbalances, and a bump switch to detect severe movement and stop the machine so that the load could be manually redistributed.

Combined processes

What is now referred to as an automatic washer was at one time referred to as a “washer/extractor”, which combined the features of these two devices into a single machine, plus the ability to fill and drain water by itself. It is possible to take this a step further, and to also merge the automatic washing machine and clothes dryer into a single device, called a combo washer dryer.

Milestones

Early machines

19th-century Metropolitan washing machine

A vintage German model

The first English patent under the category of Washing and Wringing Machines was issued in 1791.[8] A drawing of an early washing machine appeared in the January 1752 issue of The Gentlemen’s Magazine, a British publication. Jacob Christian Schäffer’s washing machine design was published 1767 in Germany.[9] In 1782, Henry Sidgier issued a British patent for a rotating drum washer, and in the 1790s Edward Beetham sold numerous “patent washing mills” in England.[10] One of the first innovations in washing machine technology was the use of enclosed containers or basins that had grooves, fingers, or paddles to help with the scrubbing and rubbing of the clothes. The person using the washer would use a stick to press and rotate the clothes along the textured sides of the basin or container, agitating the clothes to remove dirt and mud.[11] This crude agitator technology was hand-powered, but still more effective than actually hand-washing the clothes.

More advancements were made to washing machine technology in the form of the rotating drum design. Basically, these early design patents consisted of a drum washer that was hand-cranked to make the wooden drums rotate. While the technology was simple enough, it was a milestone in the history of washing machines, as it introduced the idea of “powered” washing drums. As metal drums started to replace the traditional wooden drums, it allowed for the drum to turn above an open fire or an enclosed fire chamber, raising the water temperature for more effective washes.

It would not be until the 19th century when steam power would be used in washing machine designs.[12]

In 1862, a patented “compound rotary washing machine, with rollers for wringing or mangling” by Richard Lansdale of Pendleton, Manchester, was shown at the 1862 London Exhibition.[13]

The first United States Patent titled “Clothes Washing” was granted to Nathaniel Briggs of New Hampshire in 1797. Because of the Patent Office fire in 1836, no description of the device survives. A device that combined a washing machine with a wringer mechanism did not appear until 1843, when Canadian John E. Turnbull of Saint John, New Brunswick patented a “Clothes Washer With Wringer Rolls.”[14]

Margaret Colvin invented the Triumph Rotary Washer, which was exhibited in the Women’s Pavilion at the Centennial International Exhibition of 1876 in Philadelphia.[15][16]

A 1876 advertisement published in Argentina.

Electric washing machines were advertised and discussed in newspapers as early as 1904.[17] Alva J. Fisher has been incorrectly credited with the invention of the electric washer. The US Patent Office shows at least one patent issued before Fisher’s US patent number 966677 (e.g. Woodrow’s US patent number 921195). The “inventor” of the electric washing machine remains unknown.

US electric washing machine sales reached 913,000 units in 1928. However, high unemployment rates in the Depression years reduced sales; by 1932 the number of units shipped was down to about 600,000.

It is presumed that the first laundromat opened in Fort Worth, Texas in 1934.[18] It was run by Andrew Clein. Patrons used coin-in-the-slot facilities to rent washing machines. The term “laundromat” can be found in newspapers as early as 1884 and they were widespread during the Depression. England established public wash rooms for laundry along with bath houses throughout the 19th century.[19]

Washer design improved during the 1930s. The mechanism was now enclosed within a cabinet, and more attention was paid to electrical and mechanical safety. Spin dryers were introduced to replace the dangerous power mangle/wringers of the day.

By 1940, 60% of the 25,000,000 wired homes in the United States had an electric washing machine. Many of these machines featured a power wringer, although built-in spin dryers were not uncommon.

Automatic Machines

Bendix Corporation introduced the first domestic automatic washing machine in 1937,[20] having applied for a patent in the same year.[21] In appearance and mechanical detail, this first machine was not unlike the front loading automatic washers produced today. Although it included many of the today’s basic features, the machine lacked any drum suspension and therefore had to be anchored to the floor to prevent “walking”. Because of the components required, the machine was also very expensive. For instance, the Bendix Home Laundry Service Manual (published November 1, 1946) shows that the drum speed change was facilitated by a 2-speed gearbox built to a heavy duty standard like a car synchromesh gearbox. The timer was also probably fairly costly, because miniature electric motors were expensive to produce.

Early automatic washing machines were usually connected to a water supply via temporary slip-on connectors to sink taps. Later, permanent connections to both the hot and cold water supplies became the norm, as dedicated laundry water hookups became common. Most modern front-loading European machines now only have a cold water connection (called “cold fill”) and rely completely on internal electric heaters to raise the water temperature.[22]

Many of the early automatic machines had coin-in-the-slot facilities and were installed in the basement laundry rooms of apartment houses.

World War II and after

A classic Bendix washing machine

A 1950s model Constructa

After the attack on Pearl Harbor, US domestic washer production was suspended for the duration of World War II in favor of manufacturing war material. However, numerous US appliance manufacturers were given permission to undertake the research and development of washers during the war years. Many took the opportunity to develop automatic machines, realizing that these represented the future for the industry.[23]

A large number of US manufacturers introduced competing automatic machines (mainly of the top-loading type) in the late 1940s and early 1950s. An improved front-loading automatic model, the Bendix Deluxe (which retailed at $249.50/£162.40), was introduced in 1947.[24]General Electric also introduced its first top loading automatic model in 1947. This machine had many of the features that are incorporated into modern machines.

Several manufacturers produced semi-automatic machines, requiring the user to intervene at one or two points in the wash cycle. A common semi-automatic type (available from Hoover in the UK until at least the 1970s) included two tubs: one with an agitator or impeller for washing, plus another smaller tub for water extraction or centrifugal rinsing.

One early form of automatic washing machine manufactured by Hoover used cartridges to program different wash cycles. This system, called the “Keymatic”, used plastic cartridges with key-like slots and ridges around the edges. The cartridge was inserted into a slot on the machine and a mechanical reader operated the machine accordingly. The system did not commercially succeed because it offered no real advantage over the more conventional program dial, and the cartridges were prone to getting lost. In hindsight it can be seen as a marketing gimmick rather than offering any really useful functionality.

Since their introduction, automatic washing machines have relied on electromechanical timers to sequence the washing and extraction process. Electromechanical timers consist of a series of cams on a common shaft driven by a small electric motor via a reduction gearbox. At the appropriate time in the wash cycle, each cam actuates a switch to engage or disengage a particular part of the machinery (for example, the drain pump motor).

On the early electromechanical timers, the motor ran at a constant speed throughout the wash cycle, although it was possible for the user to truncate parts of the program by manually advancing the control dial. However, by the 1950s demand for greater flexibility in the wash cycle led to the introduction of more sophisticated electrical timers to supplement the electromechanical timer. These newer timers enabled greater variation in functions such as the wash time. With this arrangement, the electric timer motor is periodically switched off to permit the clothing to soak, and is only re-energized just prior to a micro-switch being engaged or disengaged for the next stage of the process. Fully electronic timers did not become widespread until decades later.

Despite the high cost of automatic washers, manufacturers had difficulty in meeting the demand. Although there were material shortages during the Korean War, by 1953 automatic washing machine sales in the US exceeded those of wringer-type electric machines.

In the UK and in most of Europe, electric washing machines did not become popular until the 1950s. This was largely because of the economic impact of World War II on the consumer market, which did not properly recover until the late 1950s. The early electric washers were single-tub, wringer-type machines, as fully automatic washing machines were extremely expensive. During the 1960s, twin tub machines briefly became very popular, helped by the low price of the Rolls Razor washers. Some machines had the ability to pump used wash water into a separate tub for temporary storage, and to later pump it back for re-use. This was done not to save water or soap, but because heated water was expensive and time-consuming to produce. Automatic washing machines did not become dominant in the UK until well into the 1970s and by then were almost exclusively of the front-loader design.

In early automatic washing machines, any changes in impeller/drum speed were achieved by mechanical means or by a rheostat on the motor power supply. However, since the 1970s electronic control of motor speed has become a common feature on the more expensive models.

Modern washers

A see-through Bosch machine at the IFA 2010 in Berlin shows off its internal components

In the early 1990s, upmarket machines incorporated microcontrollers for the timing process. These proved reliable and cost-effective, so many cheaper machines now incorporate microcontrollers rather than electromechanical timers.

In 1994, Staber Industries released the System 2000 washing machine, which is the only top-loading, horizontal-axis washer to be manufactured in the United States. The hexagonal tub spins like a front-loading machine, only using about third of the water as conventional top-loaders. This factor has led to an Energy Star rating for its high efficiency.

In 1998, New Zealand based company Fisher & Paykel introduced its SmartDrive washing machine line in the US. This washing machine uses a computer-controlled system to determine certain factors such as load size and automatically adjusts the wash cycle to match. It also used a mixed system of washing, first with the “Eco-Active” wash, using a low level of recirculated water being sprayed on the load followed by a more traditional style wash. Other variations include the Intuitive Eco, which can sense the water level and type of fabric in the wash load, and the agitatorless AquaSmart line. The SmartDrive also included direct drive brushless DC electric motor, which simplified the bowl and agitator drive by doing away with the need for a gearbox system.

In 2000, the British inventor James Dyson launched the CR01 ContraRotator, a type of washing machine with two cylinders rotating in opposite directions. It was claimed that this design reduced the wash time and produced cleaner washing than a single cylinder machine. In 2004 there was the launch of the CR02, which was the first washing machine to gain the British Allergy Foundation Seal of Approval. However, neither of the ContraRotator machines are now in production as they were too expensive to manufacture.[25]

In 2001, Whirlpool Corporation introduced the Calypso, the first vertical-axis high efficiency washing machine to be top-loading. A washplate in the bottom of the tub nutated (a special wobbling motion) to bounce, shake, and toss the laundry around. Simultaneously, water containing detergent was sprayed on to the laundry. The machine proved to be good at cleaning, but gained a bad reputation due to frequent breakdowns and destruction of laundry. The washer was recalled with a class-action lawsuit and pulled off the market.

In 2003, Maytag introduced their top-loading Neptune washer. Instead of an agitator, the machine had two washplates, perpendicular to each other and at a 45 degree angle from the bottom of the tub. The machine would fill with only a small amount of water and the two washplates would tumble the load within it, mimicking the action of a front-loading washer in a vertical axis design.

A Beko washing machine, modern machines start at 5 kg (11 lb) capacity, ideal for smaller households and spans to 12 kg (26 lb) load capacity

In 2007, Sanyo introduced the first drum type washing machine with “Air Wash” function.[26] This washing machine uses only 50 liters of water in the recycle mode.

In 2008, the University of Leeds created a concept washing machine that uses only a cup (less than 300 ml) of water and 20 kg of re-usable plastic beads to carry out a full wash.[27] The machine leaves clothes virtually dry, and uses less than 2 % of the water and energy otherwise used by a conventional machine. As such, it could save billions of liters of water each year. The concept is being developed as the Xeros Washing Machine.

Approximately in 2012, eco indicators were introduced, capable of predicting the energy demand based on the customer settings in terms of program and temperature.[28]

In 2013, a French designer created L’Increvable, an open source washing machine delivered in kit for self-assembly. In order to fight planned obsolescence its design is simplistic and every constituent is replaceable; it is designed to last over 50 years.

Features available in most modern consumer washing machines:

Delayed execution: a timer to delay the start of the laundry cycle

Predefined programs for different laundry types

Rotation speed settings

Variable temperatures, including cold wash

Additionally some of the modern machines feature:

Child lock

Steam

Time remaining indication

Production by country

Country

Number[29]

Date of

information

China

30,355,000

2005

Italy

9,680,000

2004

USA

9,531,000

2003

South Korea

4,977,000

2003

Germany

4,856,000

2003

France

3,618,000

2004

Japan

2,622,000

2005

Turkey

2,471,000

2003

Brazil

2,266,000

2003

Mexico

1,547,000

2003

Poland

1,481,000

2005

Ukraine

322,000

2005

Sweden

124,000

2003

Kazakhstan

72,800

2005

Sri Lanka

70,500

2014

Belarus

36,700

2005

Republic of Moldova

36,200

2005

Romania

25,000

2005

Uzbekistan

700

2005

Top-loading

Low-cost top loading, vertical axis machines in laundromat (California)

In a top-loading washer, water circulates primarily along the poloidal axis during the wash cycle, as indicated by the red arrow in this illustration of a torus.

The vertical-axis top-loading clothes washer is most popular in Australia, New Zealand, Canada, the United States, and Latin America. Simplified, very-low-cost versions are made for markets in Asia, Africa, and other less-developed parts of the world.

This design places the clothes in a vertically mounted perforated basket that is contained within a water-retaining tub, with a finned water-pumping agitator in the center of the bottom of the basket. Clothes are loaded through the top of the machine, which is usually but not always covered with a hinged door.

During the wash cycle, the outer tub is filled with water sufficient to fully immerse and suspend the clothing freely in the basket. The movement of the agitator pushes water outward between the paddles towards the edge of the tub. The water then moves outward, up the sides of the basket, towards the center, and then down towards the agitator to repeat the process, in a circulation pattern similar to the shape of a torus. The agitator direction is periodically reversed, because continuous motion in one direction would just lead to the water spinning around the basket with the agitator rather than the water being pumped in the torus-shaped motion. Some washers supplement the water-pumping action of the agitator with a large rotating screw on the shaft above the agitator, to help move water downwards in the center of the basket.

In most top-loading washers, if the motor spins in one direction, the gearbox drives the agitator; if the motor spins the other way, the gearbox locks the agitator and spins the basket and agitator together. Similarly, if the pump motor rotates one way it recirculates the sudsy water; in the other direction it pumps water from the machine during the spin cycle. Because they usually incorporate a gearbox, clutch, crank, etc., top-loading washers are mechanically more complex than front loading machines. An example of the complex mechanisms once used to produce different motions from a single motor is the so-called “wig wag” mechanism, which was used for decades until modern controls rendered it obsolete. The electromechanical components in conventional top-load washers have largely reached maturity, and there is a trend towards simpler mechanical components but greater complexity in electronic controllers.

The top-loader’s spin cycle between washing and rinsing allows an extremely simple fabric softener dispenser, which operates passively through centrifugal force and gravity. The same objective must be accomplished by a solenoid valve on a front loader. Another advantage to the top loading design is the reliance on gravity to contain the water, rather than potentially trouble-prone or short-lived front door seals. Top loaders may require less periodic maintenance, since there is no need to clean a door seal or bellows, although a plastic tub may still require a periodic “maintenance wash” cycle (described below).

As with front-loading washers, clothing should not be packed tightly into a top-loading washer. Although wet fabric usually fits into a smaller space than dry fabric, a dense wad of fabric can restrict water circulation, resulting in poor soap distribution and incomplete rinsing. Extremely overloaded top-loading washers can either jam the motion of the agitator, overloading or damaging the motor or gearbox, or tearing fabrics. Extreme overloading can also push fabrics into the small gap between the underside of the agitator and the bottom of the wash basket, resulting in fabrics wrapped around the agitator shaft, possibly requiring agitator removal to unjam.

Some top-loading machines use mechanisms very similar to front-loading drum machines, and are described below.

Front-loading

Arctic BE1200A+ is a front loading budget model sold in 2008 with 6-kilogram (13 lb) load, LCD indicator, 1200 RPM

The front-loading or horizontal-axis clothes washer is the dominant design in Europe. In the U.S. and elsewhere, most “high-end” washing machines are of this type. In addition, most commercial and industrial clothes washers around the world are of the horizontal-axis design.

This layout mounts the inner basket and outer tub horizontally, and loading is through a door at the front of the machine. The door often but not always contains a transparent window. Agitation is supplied by the back-and-forth rotation of the cylinder and by gravity. The clothes are lifted up by paddles on the inside wall of the drum and then dropped. This motion flexes the weave of the fabric and forces water and detergent solution through the clothes load. Because the wash action does not require the clothing be freely suspended in water, only enough water is needed to moisten the fabric. Because less water is required, front-loaders typically use less soap, and the repeated dropping and folding action of the tumbling can easily produce large amounts of foam or suds.

Front-loaders control water usage through the surface tension of water, and the capillary wicking action this creates in the fabric weave. A front-loader washer always fills to the same low water level, but a large pile of dry clothing standing in water will soak up the moisture, causing the water level to drop. The washer then refills to maintain the original water level. Because it takes time for this water absorption to occur with a motionless pile of fabric, nearly all front-loaders begin the washing process by slowly tumbling the clothing under the stream of water entering and filling the drum, to rapidly saturate the clothes with water.

Front-loading washers are mechanically simple compared to top-loaders, with the main motor (a universal motor or variable-frequency drive motor) normally being connected to the drum via a grooved pulley belt and large pulley wheel, without the need for a gearbox, clutch or crank. But front-load washers suffer from their own technical problems, due to the drum lying sideways. For example, a top loading washer keeps water inside the tub merely through the force of gravity pulling down on the water, while a front-loader must tightly seal the door shut with a gasket to prevent water dripping onto the floor during the wash cycle. This access door is locked shut during the entire wash cycle, since opening the door with the machine in use could result in water gushing out onto the floor. For front-loaders without viewing windows on the door, it is possible to accidentally pinch fabric between the door and the drum, resulting in tearing and damage to the pinched clothing during tumbling and spinning.

Nearly all front-loader washers for the consumer market must also use a folded flexible bellows assembly around the door opening, to keep clothing contained inside the basket during the tumbling wash cycle. If this bellows assembly were not used, small articles of clothing such as socks could slip out of the wash basket near the door, and fall down the narrow slot between the outer tub and basket, plugging the drain and possibly jamming rotation of the inner basket. Retrieving lost items from between the outer tub and inner basket can require complete disassembly of the front of the washer and pulling out the entire inner wash basket. Commercial and industrial front-loaders used by businesses (described below) usually do not use the bellows, and instead require all small objects to be placed in a mesh bag to prevent loss near the basket opening.

The bellows assembly around the door is a potential source of problems for the consumer front-loader. The bellows has a large number of flexible folds to permit the tub to move separately from the door during the high speed extraction cycle. On many machines, these folds can collect lint, dirt, and moisture, resulting in mold and mildew growth, and a foul odor. Some front-loading washer operating instructions say the bellows should be wiped down monthly with a strong bleach solution, while others offer a special “freshening” cycle where the machine is run empty with a strong dosing of bleach. In the past, suggested remedies have included adding vinegar to the laundry detergent, running an empty cycle with bleach every few weeks, wiping the door gasket with a diluted bleach solution every other week, and leaving the front-loading washer door ajar between loads.

Compared to top-loading washers, clothing can be packed more tightly in a front loader, up to the full drum volume if using a cottons wash cycle. This is because wet cloth usually fits into a smaller space than dry cloth, and front loaders are able to self-regulate the water needed to achieve correct washing and rinsing. Extreme overloading of front-loading washers pushes fabrics towards the small gap between the loading door and the front of the wash basket, potentially resulting in fabrics lost between the basket and outer tub, and in severe cases, tearing of clothing and jamming the motion of the basket.

Variant and hybrid designs

European top loader with horizontal axis rotating drum (2008)

There are many variations of the two general designs. Top-loading machines in Asia use impellers instead of agitators. Impellers are similar to agitators except that they do not have the center post extending up in the middle of the wash tub basket.

Some machines which actually load from the top are otherwise much more similar to front-loading horizontal-axis drum machines. They have a drum rotating around a horizontal axis, as a front-loader, but there is no front door; instead there is a liftable lid which provides access to the drum, which has a hatch which can be latched shut. Clothes are loaded, the hatch and lid are closed, and the machine operates and spins just like a front-loader. These machines are narrower but usually taller than front-loaders, usually have a lower capacity, and are intended for use where only a narrow space is available, as is sometimes the case in Europe. They have incidental advantages: they can be loaded without bending down; they do not require a perishable rubber bellows seal; and instead of the drum having a single bearing on one side, it has a pair of symmetrical bearings, one on each side, avoiding asymmetrical bearing loading and potentially increasing life.

There are also combo washer dryer machines that combine washing cycles and a full drying cycle in the same drum, eliminating the need to transfer wet clothes from a washer to a dryer machine. In principle, these machines are convenient for overnight cleaning (the combined cycle is considerably longer), but the effective capacity for cleaning larger batches of laundry is drastically reduced. The drying process tends to use much more energy than using two separate devices, because a combo washer dryer not only must dry the clothing, but also needs to dry out the wash chamber itself. These machines are used more in Europe, because they can be fitted into small spaces, and many can be operated without dedicated utility connections.

Comparison

True front-loaders, and top-loading machines with horizontal-axis drum as described above, can be compared with top-loaders on a number of aspects:

Efficient cleaning: Front-loaders usually use less energy, water, and detergent compared to the best top-loaders.[30] “High Efficiency” washers use 20% to 60% of the detergent, water and energy of “standard” washers. They usually take somewhat longer (20-110 minutes) to wash a load, but are often computer controlled with additional sensors, to adapt the wash cycle to the needs of each load. As this technology improves, the human interface will also improve, to make it easier to understand and control the many different cleaning options.

Water usage: Front-loaders usually use less water than top-loading residential clothes washers. Estimates are that front-loaders use from one third[31] to one half[32] as much water as top-loaders.

Spin-dry effectiveness: Front-loaders (and European horizontal axis top loaders) offer much higher maximum spin speeds of up to 2000 RPM, although home machines tend to be in the 1000 to 1400 RPM range, while top-loaders (with agitators) do not exceed 1140 RPM. High-efficiency top-loaders with a wash plate (instead of an agitator) can spin up to 1100 RPM, as their center of gravity is lower. Higher spin speeds, along with the diameter of the drum, determine the g-force, and a higher g-force removes more residual water, making clothes dry faster. This also reduces energy consumption if clothes are dried in a clothes dryer.

Cycle length: Top-loaders have tended to have shorter cycle times, in part because their design has traditionally emphasized simplicity and speed of operation more than resource conservation.

Wear and abrasion: Top-loaders require an agitator or impeller mechanism to force enough water through clothes to clean them effectively, which greatly increases mechanical wear and tear on fabrics. Front-loaders use paddles in the drum to repeatedly pick up and drop clothes into water for cleaning; this gentler action causes less wear. The amount of clothes wear can be roughly gauged by the amount of accumulation in a clothes dryer lint filter, since the lint largely consists of stray fibers detached from textiles during washing and drying.

Difficult items: Top-loaders may have trouble cleaning large items, such as sleeping bags or pillows, which tend to float on top of the wash water rather than circulate within it. In addition, vigorous top-loader agitator motions may damage delicate fabrics.

Noise: Front-loaders tend to operate more quietly than top-loaders because the door seal helps contain noise, and because there is less of a tendency to imbalance. Top-loaders usually need a mechanical transmission, which can generate more noise than the rubber belt or direct drive found in most front loaders.

Compactness: True front-loading machines may be installed underneath counter-height work surfaces. A front-loading washing machine, in a fully fitted kitchen, may even be disguised as a kitchen cabinet. These models can also be convenient in homes with limited floor area, since the clothes dryer may be installed directly above the washer (“stacked” configuration).

Water leakage: Top-loading machines are less prone to leakage, because simple gravity can reliably keep water from spilling out the loading door on top. True front-loading machines require a flexible seal or gasket on the front door, and the front door must be locked during operation to prevent opening, lest large amounts of water spill out. This seal may leak and require replacement. However, many current front-loaders use so little water that they can be stopped mid-cycle for addition or removal of laundry, while keeping the water level in the horizontal tub below the door level. Best practice installations of either type of machine will include a floor drain or an overflow catch tray with a drain connection, since neither design is immune to leakage or a solenoid valve getting stuck in the open position.

Maintenance and reliability: Top-loading washers are more tolerant of maintenance neglect, and may not need a regular “freshening” cycle to clean door seals and bellows. During the spin cycle, a top-loading tub is free to move about inside the cabinet of the machine, using only a lip around the top of the inner basket and outer tub to keep the spinning water and clothing from spraying out over the edge. Therefore, the potentially problematic door-sealing and door-locking mechanisms used by true front-loaders are not needed. On the other hand, top-loaders use mechanical gearboxes that are more vulnerable to wear than simpler front-load motor drives.

Accessibility and ergonomics: Front-loaders are more convenient for very short people and those with paraplegia, as the controls are front-mounted and the horizontal drum eliminates the need for standing or climbing. For people who are not unusually short, top-loaders may be easier to load and unload, since reaching into the tub does not require stooping. Risers, also referred to as pedestals, often with storage drawers underneath, can be used to raise the door of a true front-loader closer to the user’s level.

Initial cost: In countries where top-loaders are popular, front-loaders tend to be more expensive to buy than top-loaders, though their lower operating costs can ultimately lead to lower total cost of ownership, especially if energy, detergent, or water are expensive. On the other hand, in countries with a large front-loader user base, top-loaders are usually seen as alternatives and more expensive than basic off-brand front loaders, although without many differences in total cost of ownership apart from design-originated ones. In addition, manufacturers have tended to include more advanced features such as internal water heating, automatic dirt sensors, and high-speed emptying on front-loaders, although some of these features could be implemented on top-loaders.

Wash cycles

German laundry centrifuge to extract water from laundry. The advent of automatic washing machines with spin cycles made such specialized appliances largely obsolete by the 1970s.

The earliest washing machines simply carried out a washing action when loaded with clothes and soap, filled with hot water, and started. Over time machines became more and more automated, first with very complex electromechanical controllers, then fully electronic controllers; users put clothes into the machine, select a suitable program via a switch, start the machine, and come back to remove clean and slightly damp clothes at the end of the cycle. The controller starts and stops many different processes including pumps and valves to fill and empty the drum with water, heating, and rotating at different speeds, with different combinations of settings for different fabrics.

Washing

Many front loading machines have internal electrical heating elements to heat the wash water, to near boiling if desired. The rate of chemical cleaning action of the detergent and other laundry chemicals increases greatly with temperature, in accordance with the Arrhenius equation. Washing machines with internal heaters can use special detergents formulated to release different chemical ingredients at different temperatures, allowing different type of stains and soils to be cleaned from the clothes as the wash water is heated up by the electrical heater.

However, higher-temperature washing uses more energy, and many fabrics and elastics are damaged at higher temperatures. Temperatures exceeding 40 °C (104 °F) have the undesirable effect of inactivating the enzymes when using biological detergent.

Many machines are cold-fill, connected to cold water only, which they heat to operating temperature. Where water can be heated more cheaply or with less carbon dioxide emission than by electricity, cold-fill operation is inefficient.

Front loaders need to use low-sudsing detergents because the tumbling action of the drum folds air into the clothes load that can cause over-sudsing and overflows. However, due to efficient use of water and detergent, the sudsing issue with front-loaders can be controlled by simply using less detergent, without lessening cleaning action.

Rinsing

Washing machines perform several rinses after the main wash to remove most of the detergent. Modern washing machines use less water due to environmental concerns; however, this has led to the problem of poor rinsing on many washing machines on the market,[33] which can be a problem to people who are sensitive to detergents. The Allergy UK website suggests re-running the rinse cycle, or rerunning the entire wash cycle without detergent.[34] In response to complaints, many washing machines allow the user to select additional rinse cycles, at the expense of higher water usage and longer cycle time.

Spinning

Higher spin speeds, along with larger tub diameters, remove more water, leading to faster drying. If a heated clothes-drier is used after the wash and spin, energy use is reduced if more water has been removed from clothes. However, faster spinning can crease clothes more. Also, mechanical wear on bearings increases rapidly with rotational speed, reducing life. Early machines would spin at only 300 rpm and, because of lack of any mechanical suspension, would often shake and vibrate.

In 1976, most front loading washing machines spun at around 700 rpm, or less.

Separate spin-driers, without washing functionality, are available for specialized applications. For example, a small high-speed centrifuge machine may be provided in locker rooms of communal swimming pools to allow wet swimsuits to be substantially dried to a slightly damp condition after daily use.

Maintenance wash

Many home washing machines use a plastic, rather than metal, outer shell to contain the wash water; residue can build up on the plastic tub over time. Some manufacturers advise users to perform a regular maintenance or “freshening” wash to clean the inside of the washing machine of any mold, bacteria, encrusted detergent, and unspecified dirt more effectively than with a normal wash.

A maintenance wash is performed without any laundry, on the hottest wash program,[35] adding substances such as white vinegar, 100 grams of citric acid, a detergent with bleaching properties, or a proprietary washing machine cleaner. The first injection of water goes into the sump[36] so the machine can be allowed to fill for about 30 seconds before adding cleaning substances.

Efficiency and standards

Capacity and cost are both considerations when purchasing a washing machine. All else being equal, a machine of higher capacity will cost more to buy, but will be more convenient if large amounts of laundry must be cleaned. Fewer runs of a machine of larger capacity may have lower running costs and better energy and water efficiency than frequent use of a smaller machine, particularly for large families. Running a large machine with small loads is wasteful.

For many years energy and water efficiency were not regulated, and little attention was paid to them. From the last part of the twentieth century increasing attention was paid to efficiency, with regulations enforcing some standards, and efficiency being a selling point, both to save on running costs and to reduce carbon dioxide emissions associated with energy generation, and waste of water.

As energy and water efficiency were regulated, and a selling point, but effectiveness of rinsing was not, manufacturers tended to reduce the degree of rinsing after washing, saving water and motor energy. This had the side-effect of leaving more detergent residue in clothes. Insufficient rinsing can leave enough detergent in clothes to affect people with allergies or sensitivity.[33]

Europe

The EU requires washing machines carry an efficiency label

Washing machines display an EU Energy Label with grades for energy efficiency, washing performance and spin efficiency. Grades for energy efficiency run from A+++ to G (best to worst), providing a simple method for judging running costs. Washing performance and spin efficiency are graded in the range A to G. However, all machines for sale must have washing performance A, such that manufacturers cannot compromise washing performance in order to improve the energy efficiency. This labeling has had the desired effect of driving customers toward more efficient washing machines and away from less efficient ones.

The TopTenEU and other national TopTen European organizations provide independent recommendations for high efficient washing machines.[37]

United States

Top-loading and front-loading clothes washers are covered by a single Federal Standard regulating energy consumption. The old Federal Standard applicable until January 1, 2011 included no restriction on water consumption; washer manufacturers faced no legal restriction on how much unheated rinse water could be used.[38] Energy consumption for clothes washers is quantified using the energy factor.

But after new mandatory Federal Standards were introduced, many US washers were manufactured to be more energy- and water-efficient than required by the federal standard, or even certified by the more stringent Energy Star standard.[39] Manufacturers were found to be motivated to exceed mandatory standards by a program of direct-to-manufacturer tax credits.[40]

In North America, the Energy Star program compares and lists energy efficient clothes washers. Certified Energy Star units can be compared by their Modified Energy Factor (MEF) and Water Factor (WF) coefficients.

The MEF tells us how many cubic feet of clothes are washed per kWh (kilowatt hour) and is closely related to the configuration of the washer (top-loading, front-loading), its spin speed and the temperatures and the amount of water used in the rinse and wash cycles.

Energy Star residential clothes washers have a MEF of at least 2.0 (the higher the better), but the best machines may reach 3.5 Energy Star washers have also a WF of less than 6.0 (the lower the better).[41]

Commercial use

Commercial washing machines and dryers (at left) in a self-service laundry (Paris, France)

Commercial washing machines in a self-service laundromat (Toronto, Canada)

A commercial washing machine is intended for more frequent use than a consumer washing machine. Durability and functionality is more important than style; most commercial washers are bulky and heavy, and have a sharp-edged square appearance, often with more expensive stainless steel construction to minimize corrosion in a constantly moist environment. They are built with large easy-to-open service covers, and washers are designed not to require access to the underside for service. Often commercial washers are installed in long rows with a wide access passageway behind all the machines to allow maintenance without moving the heavy machines.

Laundromat machines

Many commercial washers are built for use by the general public, and are installed in publicly accessible laundromats or laundrettes, operated by money accepting devices or card readers. The features of a commercial laundromat washer are more limited than a consumer washer, usually offering just two or three basic wash programs and an option to choose wash cycle temperatures.

The common front-loading commercial washing machine also differs from consumer models in its expulsion of wash and rinse water. While the consumer models pump used washer water out, allowing the waste line to be located above the washer, front loading commercial machines generally use only gravity to expel used water. A drain in the rear, at the bottom of the machine opens at the appointed time during the cycle and water flows out. This creates the need for a drainage trough behind machines, which leads to a filter and drain. The trough is usually part of a cement platform built for the purpose of raising the machines to a convenient height, and can be seen behind washers at most laundromats.

Most laundromat machines are horizontal-axis front-loading models, because of their lower operating costs (notably lower consumption of expensive hot water).

Industrial washers

A 1980s Belgian 90 kg load industrial washer (horizontal axis, front load)

By contrast, commercial washers for internal business operations (still often referred to as “washer/extractor” machines) may include features absent from domestic machines. Many commercial washers offer an option for automatic injection of five or more different chemical types, so that the operator does not have to deal with constantly measuring out soap products and fabric softeners for each load by hand. Instead, a precise metering system draws the detergents and wash additives directly from large liquid-chemical storage barrels and injects them as needed into the various wash and rinse cycles. Some computer-controlled commercial washers offer the operator complete control over the various wash and rinse cycles, allowing the operator to program custom washing cycles.

Most large-scale industrial washers are horizontal-axis machines, but may have front-, side-, or top-load doors. Some industrial clothes washers can batch-process up to 800 pounds (360 kg) of textiles at once, and can be used for extremely machine-abusive washing tasks such as stone washing or fabric bleaching and dyeing.

An industrial washer can be mounted on heavy-duty shock absorbers and attached to a concrete floor, so that it can extract water from even the most severely out-of-balance and heavy wash loads. Noise and vibration is not as unacceptable as in a domestic machine. It may be mounted on hydraulic cylinders, permitting the entire washer to be lifted and tilted so that fabrics can be automatically dumped from the wash drum onto a conveyor belt once the cycle is complete.

One special type of continuous-processing washer is known as the tunnel washer. This specialized high-capacity machine does not have a drum where everything being washed undergoes distinct wash and rinse cycles, but moves the laundry slowly and continuously through a long, large-diameter horizontal-axis rotating tube in the manner of an assembly line, with different processes at different positions.

Social impact

“Woman’s Friend” machine (c. 1890)

The historically laborious process of washing clothes (a task which often had a whole day set aside to perform) has at times been labelled ‘woman’s work’.

In 2009 L’Osservatore Romano published an article entitled “The Washing Machine and the Liberation of Women” that was controversially meant to demonstrate that the washing machine had done more for the liberation of women than the contraceptive pill and abortion rights, which are often associated with Women’s Day.[42] The article shocked Italian feminists and provoked criticism from Opposition MP Paola Concia.[43] A study from Université de Montréal, Canada presented a similar point of view.[44]

Swedish statistician Hans Rosling suggested that the positive effect the washing machine had on the liberation of women, makes it “the greatest invention of the industrial revolution”.[45] For instance, historian Frances Finnegan credits the rise of this technology in helping undercut the economic viability of the Magdalene Asylums in Ireland, later revealed to be inhumanly abusive prisons for women with often little opportunity for release, by supplanting their laundry businesses and prompting the eventual closure of the institutions as a whole.[46]

Before the advent of the washing machine, apart from watercourses, laundry was also done in communal or public washhouses.[47]Camille Paglia and others argue that the washing machine led to a species of social isolation of women.[48]

In India, Dhobis, a caste group specialized in washing clothes, are slowly adapting to modern technology, but even with access to washing machines, many still handwash garments as well.[49] Since most modern homes are equipped with a washing machine, many Indians have dispensed with the services of the dhobiwallahs.[50]

Environmental impact

Due to the increasing cost of repairs relative to the price of a washing machine, there has been a major increase in the number of defective washing machines being discarded, to the detriment of the environment. The cost of repair and the expected life of the machine may make the purchase of a new machine seem like the better option.[51]

Different washing machine models vary widely in their use of water, detergent, and energy. The energy required for heating is large compared to that used by lighting, electric motors, and electronic devices. Because of their use of hot water, washing machines are among the largest consumers of energy in a typical modern home.

Manufacturers and brands

Notable brands include:

Alliance Laundry Systems:[52] including the brand names Cissell, D’Hooge, Huebsch, IPSO, Speed Queen, UniMac and Primus

Arçelik: including the brand names Arçelik, Beko, Blomberg, Grundig, Arctic, Altus, Flavel, Elektra Bregenz, Leisure

Brandt France

BSH: including the brand names Siemens (German), Bosch (German)

Candy: including brand names Baumatic, Candy, Hoover, Zerowatt, Helkama, Grepa, Vyatka, Jinling

Electrolux: including the brand names Electrolux, Frigidaire, Kenmore, Arthur Martin,[53]Zanussi, AEG (German), and White-Westinghouse (until 2006)

Fagor

Fisher & Paykel New Zealand

GE: including brand name Hotpoint (North America)

Girbau Spain

Gorenje

Haier China

IFB (India)

Indesit: including the brand names Indesit, Ariston, Hotpoint (Europe), Scholtes

LG including Gold Star and Kenmore

Mabe (in Mexico)

Maharaja (in India)

Miele (German)

Panasonic

SMEG: including brand names SMEG worldwide and White Westinghouse in Europe

Samsung including Kenmore

Sharp

Toshiba

Vestel: Vestel, Regal, Vestfrost

Videocon (in India)

Whirlpool: including the brand names Acros, Admiral, Amana, Bauknecht, Estate, Inglis, Kenmore, Laden, Maytag, Magic Chef, Kirkland, Roper & Philips, Brastemp and Consul (Brazilian market)

See also

Centrifugation

Clothes dryer

Combo washer dryer

Detergent

Drying cabinet

Energetic efficiency

Home appliance

Ironing

Laundry detergent

Laundry symbols

List of home appliances

Major appliance

Silver Nano

Standpipe

L’Increvable

References

^ Mintz, Steven. “Housework in Late 19th Century America”. Digital History.

^ “On March 28, 1797, Nathaniel Briggs of New Hampshire…”. tribunedigital-chicagotribune. Retrieved 13 February 2016.

^ a b “History of Washing Machines”. About.com Inventors. Retrieved 2012-05-24.

^ Arwen Mohun, Steam Laundries: Gender, Technology, and Work, Johns Hopkins University Press, 1999, p28

^ Arwen Mohun, Steam Laundries: Gender, Technology, and Work, Johns Hopkins University Press, 1999

^ Illustration of a 1919 line shaft-driven commercial horizontal washer with a separate large vertical extractor behind it – “Don’t Waste Waste”, Popular Science monthly, January 1919, page 73, Scanned by Google Books: https://books.google.com/books?id=HykDAAAAMBAJ&pg=PA73

^ “New Devices that Ought to Make Housekeeping Easy”, Popular Science, Feb 1919

^ Mothers and Daughters of Invention: Notes for a Revised History of Technology, Autumn Stanley, Rutgers University Press, 1995, p. 301

^ “Deutsches Museum: Schäffer”. Deutsches-museum.de. Retrieved 2011-12-12.

^ “History of Washing Machines up to 1800”. Oldandinteresting.com. 2011-04-14. Retrieved 2012-06-01.

^ Washing Machine – MSN Encarta. Archived from the original on 2009-10-31.

^ “Washing Machine Facts, information, pictures | Encyclopedia.com articles about Washing Machine”. Encyclopedia.com. Retrieved 2012-06-01.

^ “1862 London Exhibition: Catalogue: Class VIII.: Richard Lansdale”. GracesGuide.co.uk. Retrieved 2010-06-19.

^ Mario Theriault, Great Maritime Inventions 1833-1950, Goose Lane, 2001, p. 28

^ Womanlist – Marjorie P. K. Weiser, Jean S. Arbeiter – Google Books. Books.google.com. Retrieved 2012-10-14.

^ Women, Aging, and Ageism – Evelyn R Rosenthal – Google Books. Books.google.com. Retrieved 2012-10-14.

^ “Electric Washing Machine the Latest. Housewives can do Washing in one-third the Time”, Des Moines Daily Capitol, November 12, 1904, p. 13.

^ David John Cole, Eve Browning, Fred E. H. Schroeder, Encyclopedia of Modern Everyday Inventions, Greenwood 2003

^ New York Times, April 13, 1884; New London Journal, July 22, 1917

^ “LIFE”. Retrieved 13 February 2016.

^ US 2165884 

^ “Test & Vergleich”. Archived from the original on March 17, 2016. Retrieved March 17, 2016.

^ A. S. Campbell Co. “Your Next Washing Machine (or is it?), advertisement for Campbell wartime production”. Retrieved 13 September 2012.

^ video demonstration

^ Dyson, James. “Inside Dyson: CR01”. dyson.co.uk. Retrieved 13 July 2012.

^ “SANYO Announces the World-First*1 Drum Type Washing Machine with ‘Air Wash’ Function”. Sanyo.com. Retrieved 2012-06-01.

^ Poulter, Sean (9 June 2008). “Spin dry: The washing machine that needs just one cup of water”. Daily Mail.

^ “Whirlpool’s Eco Monitor guarantees energy optimisation – The KBzine”. http://www.thekbzine.com. Retrieved 2016-07-03.

^ “Production. Household washing machines — Country Comparisons – world map”. statinfo.biz. Retrieved 19 January 2015.

^ “Laundry Products Research”. March 2008.

^ “About.com”.

^ “Consumer Energy Center”.

^ a b “Why can’t modern washing machines rinse properly?”. Whitegoodshelp.co.uk. Retrieved 2010-02-16.

^ “Allergy Tips and Advice for Household Cleaning”. Allergyuk.org. Retrieved 2010-02-16.

^ “Washing machine usage (part 2)”. Washerhelp.co.uk. Retrieved 2010-02-16.

^ “DIY washing machine repairs (Part 4)”. Washerhelp.co.uk. Retrieved 2010-02-16.

^ “Selection criteria washing machines”. TopTenEU

^ “Clothes Washers Key Product Criteria”. Energystar.gov. Retrieved 2012-06-01.

^ “ENERGY STAR Qualified Clothes Washers”. Energystar.gov. 2011-01-01. Retrieved 2012-06-01.

^ “Tax Incentives Assistance Project”. Energytaxincentives.org. Retrieved 2012-06-01.

^ “Clothes Washers Key Product Criteria”. Energy Star

^ Galeotti, Giulia (8 March 2009). “Metti il detersivo, chiudi il coperchio e rilassati”. L’Osservatore Romano (in Italian). Retrieved 25 July 2011.

^ “Washer liberated women, Vatican says”. Web.archive.org. 2009-03-12. Retrieved 2012-06-01.

^ “Fridges And Washing Machines Liberated Women, Study Suggests”. Sciencedaily.com. 2009-03-12. Retrieved 2012-06-01.

^ “Hans Rosling and the magic washing machine”. TED Conferences. December 2010. Retrieved 17 November 2011.

^ Finnegan, Frances (2004). Do Penance or Perish: Magdalen Asylums in Ireland. Oxford University Press.

^ “Local Laundry Business”. Retrieved August 2015. Check date values in: |access-date= (help)

^ “As mulheres sufocam os homens”. Revista Veja, issue 2,363, 5 March 2014 (in Portuguese) [1].

^ Rebecca Bundhun. “Dhobi tradition far from washed up”. thenational.ae. Retrieved 19 January 2015.

^ Photos (19 January 2015). “Indian laundry men spin out decades-old tradition”. NBC News. Retrieved 19 January 2015.

^ “Are new washing machines only built to last 5 years?”. Washerhelp.co.uk. Retrieved 2012-06-01.

^ “Alliance website”. Retrieved 2013-11-05.

^ [2]

External links

The Wikibook The Housework Manual has a page on the topic of: Laundry/Separation and Washing

Wikimedia Commons has media related to Washing machines.

Wikisource has the text of the 1920 Encyclopedia Americana article Washing Machine.

Preservation and also exhibition of vintage washing machines

History of Washing Machines

How Washing Machines Work Article by HowStuffWorks.com

Washing Machine Museum

v

t

e

Laundry

List of laundry topics

Chemicals

Biological detergent

Bleach

Fabric softener

Laundry detergent

Washing

Combo washer dryer

Wet cleaning

Dry cleaning

Tunnel washer

Washboard

Washing machine

Drying

Clothes dryer

Clothes horse

Clothes line

Drying cabinet

Hills Hoist

Mangle

Finishing

Box mangle

Clothes hanger

Ironing

Concepts

Colour fastness

Fulling

Ironing

Posting

Shrinkage

Stain

Organizations

Chinese Hand Laundry Alliance

French laundries of California

Laundry and Dry Cleaning International Union

Laundry Workers Industrial Union

Project Laundry List

Worshipful Company of Launderers

Culture

Dhobi

Housekeeping

Industrial laundry

Laundry symbol

Accessories

Clothespin

Dispensing ball

Hamper

Laundry ball

Washing paddle

Law

Barbier v. Connolly

Kimball Laundry Co. v. United States

Muller v. Oregon

Pearson v. Chung

Yick Wo v. Hopkins

Places

Baths and wash houses in Britain

Dhobi Ghat

Laundry room

Lavoir

Self-service laundry

Tvättstuga

Authority control

LCCN: sh85145333

GND: 4189162-4

BNF: cb11946910x (data)

NDL: 01178776

Retrieved from “https://en.wikipedia.org/w/index.php?title=Washing_machine&oldid=738819840”

https://en.wikipedia.org/wiki/Washing_machine

Different Types Of Refrigeration by Glenn Day

Each and every day, millions of people in the United States use a refrigerator. Many businesses depend on them as they are crucial to maintain our foods safety. When it comes down to it, refrigerators are so commonplace in our day, it is hard to imagine people would add chemicals or use ice to keep things cool. Beyond the refrigerator in a home setting, most people never even think of the extensive technology required to keep commercial and industrial food appropriately cooled at all times. Generally speaking, equipment is needed to protect and store goods, largely food, during shipping by road, rail, air and sea. Without the ability to do this, food would have no way of being moved from one area to the next without spoiling.

Domestic vs. Commercial Refrigeration

Domestic Refrigeration: This type of refrigeration is one that is familiar to most homeowners. Refrigerators and freezers that you keep in your home fall under this category. This is the type of unit that is used to keep food cold in a residential environment.

Commercial Refrigeration: This type of refrigeration holds and displays frozen and fresh food in retail stores, as well as other like establishments. In most cases, this type of refrigeration is farther advanced than refrigerators that you would find in residential homes. As you can imagine, it is crucial that many commercial establishments keep their refrigerators up to date with food safety regulations. This ranges from retail stores to restaurants and many more.

Food processing and Storage: This type of refrigeration is used to preserve process and store the food from its source to the wholesale division. If you are not in the food industry, you probably do not have much knowledge on this type of refrigeration. But even though you may not know about this, it still affects you in more ways than you can imagine. After all, you want your food to be fresh when it finally arrives at your home, right?

There is also a large variety of specialized equipment that may be required to protect and store foods when being shipped by road, rail, air, and sea. In other words, the food cannot thaw out just because it is in transit. Instead, special equipment is used to make sure that food is kept at the appropriate temperature regardless of transportation method.

All in all, there are many different types of refrigeration that help to ensure the overall quality and safety of food.

http://www.articlecity.com/articles/food_and_drink/article_1716.shtml

GE Modernizes the Microwave/Wall Oven Combination with its Popular Advantium® Wall Oven

LOUISVILLE, Ky.–(BUSINESS WIRE)–It’s not a standard wall oven. It’s more than a microwave. The latest

microwave/wall oven combo is now available with GE’s most advanced

cooking technology–the Advantium® speedcooking oven–the ultimate kitchen

multitasker. It’s like having four ovens in one: Speedcook, true

European convection, microwave and warming/proofing. Upgrading the

microwave portion of the combo to the Advantium wall oven, GE is giving

these appliance owners a plethora of cooking choices.

According to the American Institute of Architects, more activities are

taking place in kitchens. While kitchens haven’t significantly increased

in size, they are including more technology. On top of the increasing

use of technology, more people are remodeling their kitchens. 1 GE’s

new Advantium/wall oven footprint and connections match those kitchens

that already have the built-in microwave/wall oven set and could prove a

space-saver for other consumers looking to remodel the kitchen without

adding additional floor space.

“By purchasing an appliance that already fits the cut-out of current

kitchen cabinets, homeowners don’t have to totally reconfigure the

kitchen layout which will save them money on the cost of a remodel,”

said Paul Bristow, product manager for Built-in Cooking at GE

Appliances. “With the built-in Advantium/wall oven combo, consumers can

get all the latest features GE has to offer and a product that doesn’t

cause installation stress.”

The Advantium component of the wall oven combo features technology that

harnesses the power of light, cooking the outside of the food like a

conventional oven with radiant heat produced by halogen bulbs above and

below the food. This halogen-produced heat receives a boost of microwave

energy. The result is it browns food and cooks evenly and quickly–two to

eight times faster than a conventional oven–while retaining food’s

natural moisture.

Other combination wall oven configurations

“The unique design looks like double wall ovens, but in fact we’ve given

consumers multiple options for the upper portion of the appliance

–Advantium or microwave,” said Bristow. To dovetail its wall oven launch

last year, GE is also offering the combination unit in other variations,

including:

27″ and 30″ microwave/thermal-oven combo in GE’s brand with an MSRP of

$2,999.

Convection microwave/convection-oven combo in 30″ Profile(TM) with an

MSRP of $3,499.

Only the Profile and Café(TM) models feature the option of an

Advantium/convection-oven combo with an MSRP of $3,999.

Follow us on Facebook and Twitter or check out our website for more

information

Friend GE Appliances on Facebook to view how-to videos, learn about new

GE appliances and join in the discussion with other GE appliance owners.

Join today and follow @GE_Appliances on Twitter or just locate detailed

information about our products at http://www.geappliances.com.

About GE Appliances

GE Appliances is at the forefront of building innovative,

energy-efficient appliances that improve people’s lives. GE Appliances’

products include refrigerators, freezers, cooking products, dishwashers,

washers, dryers, air conditioners, water filtration systems and water

heaters. General Electric (NYSE: GE) works on things that matter to

build a world that works better. For more information on GE Appliances,

visit http://www.ge.com/appliances.

1 American Institute of Architects, http://www.aia.org/practicing/AIAB097963

http://www.businesswire.com/news/home/20140923005765/en/GE-Modernizes-MicrowaveWall-Oven-Combination-Popular-Advantium

Ban on Garbage Disposals? Really?

Design

Published on March 20th, 2008 |

by Joel Bittle

March 20th, 2008 by Joel Bittle 

water splashIn a move that had many residents bewildered, the Raleigh, North Carolina, city council voted to ban garbage disposals in all new construction and to prohibit residents from replacing broken garbage disposals. The ordinance, which took effect this week, has its roots in over 100 large sewage spillovers in the last three years within the city of Raleigh. The cost of such cleanups and the threatened fines from state agencies forced the council to implement the ban. What’s the connection between garbage disposals and sewage spillovers? Grease. The city’s sewage system builds up with grease until the pipes need to be cleaned out with a special truck – or a spillover occurs. Reduce the amount of food and grease going down kitchen sinks, so the Raleigh city council believes, and you reduce the costly cleanups.

Though Raleigh mayor Charles Meeker claims that garbage disposals waste about 500,000 gallons of water a day, the environmental effects of garbage disposals have been studied and debated for decades, due much in part to New York’s twenty year ban on garbage disposals, which was lifted in 1997. Garbage disposals are rare in Europe because of their  alleged negative impact on water treatment plants.  Proponents of garbage disposals say they divert the impact of garbage from landfills and incinerators, and a study done by the University of Wisconsin concluded that disposing of food waste through a garbage disposal is more environmentally friendly than throwing it in the garbage.  InSinkErator, who sells the majority of garbage disposals across the country, used such studies to push New York officials to drop their ban and hope to do the same in North Carolina.

So many factors go into the green-ness of garbage disposals that it’s hard to determine if they are helping or harming the environment.  They use water and power.  They make it easy for people to throw things down the drain that they shouldn’t.  And does all that ground up food really affect water treatment plants?  Do they really help cut down on landfills?  Are the bacteria in the food better off down the drain than in the landfills, as the Wisconsin study claims?  All these factors weave into a green gordian knot that can be easily cut through one practice: composting.

The Raleigh city council has probably already achieved its goal in implementing this ban, getting residents to think about what they throw down their drains.  Perhaps the next step, if residents succeed in overturning the ban, is consumer awareness of the benefits of composting.  If the city is truly concerned about the water usage of garbage disposals, and residents are truly concerned about landfills, then a community composting plan should be put into effect, much like the one currently in place in Brooklyn.  Urban composting bins are becoming more popular, with city-dwellers using them in community gardens if they don’t have their own.  Click here for a link to a DIY urban composting bin article. 

Please give us your thoughts on the garbage disposal ban and perhaps what steps you think the city council should take to fix their sewage issues.

Tags: composting, garbage, landfill, Renewable Energy, water




http://greenbuildingelements.com/2008/03/20/ban-on-garbage-disposals-really/

Home Improvement :: How to Prevent Clothes Dryer Fires (Page 1 of 2)

Few people realize the importance of dryer safety. According to the U.S. Consumer Product Safety Commission, there are an estimated annual 15,500 fires, 10 deaths and 10 injuries caused by dryer fire. Several hundred people a year are also subjected to carbon monoxide poisoning from improper dryer safety measures. The financial costs come to nearly $100,000,000 per year. In some cases faulty appliances are to blame, but many fires can be prevented with proper dryer safety precautions.

Why Dryer Fires Occur Lint accumulation and reduced airflow feed on each other to provide conditions ripe for a fire. Lint is a highly combustible material, which, interestingly enough, is one of the ingredients in a recipe for home-made fire starters. A number of dryer vent problems contribute to this. A growing problem Traditionally, most clothes dryers were in the basement. However, nowadays many newer homes tend to have dryers located away from an outside wall in bedrooms, bathrooms, kitchens and hall closets. These new locations mean dryers tend to be vented longer distances and vents are generally installed with sharp turns and bends to accommodate the structure of the home. As a result, dryer vents are harder to reach, and also create more places for lint to gather. The ideal solution is to have short, straight, dryer duct venting. However, a dryer vent booster, while not the ideal approach, can improve your dryer venting in cases where your venting is longer and/or has more bends than it should. In addition to creating a fire hazard, if the venting is too long and/or has two many bends, it will cause your dryer to take much longer than necessary to dry loads.

Inside the Dryer Lint is the biggest culprit here. As you know from cleaning out your lint filter, dryers produce very large quantities of lint. Most people assume their lint traps catch all the lint, and that all they need to do is clean them out after each load. However, a significant amount of this lint is not caught by the lint trap and builds up inside the dryer-even on the heating element! If you are skeptical, try this experiment: pull out the lint trap and look underneath it- you may find large mounds of lint staring at you. Lint can build up on the heating element and in other places inside the dryer, causing it to overheat and possibly catch fire. As a rule, a fire starts from a spark in the machine. However, improper clothes dryer venting practices outside the dryer can play a key role in this process.

Outside the Dryer There are many improper dryer vent practices which restrict airflow and lead to lint buildup, the two main preventable causes of dryer fires. Some of the most common and important dryer vent mistakes are: 1. Dryer vents are too long and/or have too many bends, but don’t use a dryer duct booster, resulting in lint buildup. When it comes to dryer vents, shorter and straighter is better. 2. Use of flammable, flimsy plastic or foil duct extenders. Only metal vents should be used, which is what most manufacturers specify. Metal vents also resist crushing better than plastic and foil, which allows the air and lint to be carried out of the system. Reduced airflow from build-up or crushing can cause overheating and wear out the clothes and appliance faster. In fact, many state and local municipalities have placed requirements on new and remodeling projects to include all metal dryer venting. 3. Inadequate clearance space between dryer and wall. Many people create problems by putting their dryer right against the wall, crushing the venting material in the process. The cumulative effect of reduced airflow and the resulting lint build-up prevent the dryer from drying at the normal rate. This causes the high temperature limit safety switch to cycle on and off to control the heater. Most high temperature limit safety switches were not designed to continuously cycle on and off, so they fail over a period of time. 4. Failure to clean the dryer duct.

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