Clothes dryer
A simpler non-rotating machine called a "drying cabinet" may be used for delicate fabrics and other items not suitable for a tumble dryer.
They can be as thin as 40 centimetres (16 in) in width, and may include detachable stationary racks for drying items like plush toys and footwear.
[2] These centrifuge machines simply spin their drums much faster than a typical washer could, in order to extract additional water from the load.
They may remove more water in two minutes than a heated tumbler dryer can in twenty, thus saving significant amounts of time and energy.
Although spinning alone will not completely dry clothing, this additional step saves a worthwhile amount of time and energy for large laundry operations such as those of hospitals.
The hot, humid air from the tumbler is passed through a heat pump where the cold side condenses the water vapor into either a drain pipe or a collection tank and the hot side reheats the air afterward for re-use.
[6] Marketed by some manufacturers as a "static clothes drying technique", convectant dryers simply consist of a heating unit at the bottom, a vertical chamber, and a vent at top.
Given that this is a relatively simple and cheap technique to materialize, most consumer products showcase the added benefit of portability and/or modularity.
Newer designs implement a fan heater at the bottom to pump hot air into the vertical drying rack chamber.
Temperatures in excess of 60 °C (140 °F) can be reached inside these "hot air balloons," yet lint, static cling, and shrinkage are minimal.
It also cannot compete with the tumble dryer's capacity to dry multiple loads of wet clothing in a single day.
The solar dryer is a box-shaped stationary construction which encloses a second compartment where the clothes are held.
Some analysts think that the arcing and fabric damage is a factor preventing microwave dryers from being developed for the US market.
[11][12] Ultrasonic dryers use high-frequency signals to drive piezoelectric actuators in order to mechanically shake the clothes, releasing water in the form of a mist which is then removed from the drum.
This can be a minor nuisance and is often a symptom of over-drying textiles to below their equilibrium moisture level, particularly when using synthetic materials.
[19] Simply washing drowns dust mites, and exposure to direct sunlight for three hours kills their eggs.
[16] Moisture and lint are byproducts of the tumble drying process and are pulled from the drum by a fan motor and then pushed through the remaining exhaust conduit to the exterior termination fitting.
These systems are necessary, in order to prevent lint from building up inside the dryer and evaporator and condenser coils.
Aftermarket add-on lint and moisture traps can be attached to the dryer duct pipe, on machines originally manufactured as outside-venting, to facilitate installation where an outside vent is not available.
The Fire Administration attributes "Failure to clean" (34%) as the leading factor contributing to clothes dryer fires in residential buildings, and observed that new home construction trends place clothes dryers and washing machines in more hazardous locations away from outside walls, such as in bedrooms, second-floor hallways, bathrooms, and kitchens.
[29] Clothes dryers are second only to refrigerators and freezers as the largest residential electrical energy consumers in America.
[33] Industrial designer Brooks Stevens developed an electric dryer with a glass window in the early 1940s.
