what is a kitchen sink garbage disposal?
A sink garbage disposal unit, also known as waste disposal unit or garburator, usually electrically powered,is a device underneath a kitchen sink between the sink’s drain and the trap which shreds food waste into pieces small enough—generally less than 2 mm (0.079 in),so that it can pass through plumbing. A kitchen garbage disposal is a great way to keep the smells of old garbage out of your garbage cans and kitchen.
kitchen sink garbage disposal units are widely used in United States families, but now it also used commonly in other elsewhere world places.The sink garbage disposal was invented by John W. Hammes in 1927 . It was now become the world famous brand-InSinkErator.
In the America some 50% of households had food waste disposal units in the year of 2010, compared with only 6% in the UK and 3% in Canada. In Sweden, some municipalities encourage the installation of sink garbage disposal units so as to increase the amount production of biogas. Some local authorities in Britain subsidise the purchase of sink garbage disposal units in order to reduce the amount of garbage goingn out to landfill.
How does a sink garabge disposer works?
It was a high-torque, insulated electric motor, usually rated at 250–750 watts (1/3 to 1 horsepower) for a domestic unit, spins a circular turntable mounted horizontally above it. Induction motors (AC motors)rotates at 1,400–1,800 RPM and have low torque. The added weight and size of induction motors may be of something a concern, depending on the cabinet installation space and construction of the sink bowl. Universal motors(DC motor or Commutator motor) rotate at higher speeds (about 2,800 rpm), have highly starting torque, and are usually more lighter, but are noisier than induction motors, partially due to the higher speeds and partially because the commutator brushes rub on the slotted armature.The higher starting torque of those appliances with a permanent magnet motor ensures in most cases that there will be no blockage or clogged.
Inside the grinding chamber there is a rotating metal turntable which the food waste drops onto. Two swiveling metal impellers mounted on top of the plate near the edge then fling the food waste against the grind ring repeatedly. Grooves in the grind ring break down the garbage until it is small enough to pass through openings in the ring, whereupon it is flushed down the drain.
Usually, there is a partial rubber closure on the top of the disposal unit to prevent food waste from flying back up out of the grinding chamber. It may also be used to attenuate noise from the grinding chamber for quieter operation. Many high-end or commercial disposals have an additional blade attached beneath the turntable. The purpose of this blade is to chop up stringy food waste that would otherwise bypass the grind ring and clog the pipework.
There are two main types of sink garbage disposals — batch feed and continuous feed. Continuous feed models are used by feeding in garbage after being started. It is more commonin our daily use. Batch feed disposals are used by placing waste inside the unit before being started. These types of sink garbage disposals are started by placing a specially designed cover over the opening and twisting it to allow magnets in the cover to align with magnets in the unit. Because it is covered during operation, it is quieter than continuous feed disposers. Small slits in the cover allow water to flow through. Batch feed disposals are also safer, since the top of the disposal is covered during operation, preventing foreign objects from falling in.
Waste disposal units may sometimes in the state of jam, but can usually be cleared either by forcing the turntable round from above or by turning the motor using a hex-wrench inserted into the motor shaft from below. Very hard objects accidentally or deliberately introduced, such as metal cutlery, can damage the waste disposal unit and become damaged themselves. More problematic are drain blockages caused by shredded waste that is fibrous, e.g., artichoke leaves, or starchy, e.g., potato peelings.
Some higher-end kitchen sink garbage disposals have an automatic reversing jam clearing function. By using a slightly more-complicated centrifugal starting switch, the split-phase motor rotates in the opposite direction from the previous run each time it is started. This can be prevented from clogged.