Specifications
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12.13 Working cycle:
There are three cycles involved in washing process. i) Wash cycle ii) Rinse cycle and iii)
spin cycle
Wash cycle: This cycle involves thorough cleaning of the cloths i.e., removing dirt from cloths.
This is done by moving the cloths up, down, back and forth, by means of Agitator cylinder/
Tumbler washing tub, so that the cloths get mixed well with the detergents. This motion is
repeated for a determined period of time.
Rinse cycle: This cycle involves discharging the detergent particles trapped in the washed
fabric.
Spin cycle: This cycle involves removing out as much water as possible from the wet clothes.
12.14 Constructional details of semi-automatic washing machine:
Fig. 12.7 - Semi-automatic washing machine
1. Pulsator
2. Water Strainer
3. Wash Drum
4. Water Level Selector
5. Lint Filter
6. Wash Timer
7. Water Inlet Pipe
8. Drain Hose
9. Scrubber
10. Spin Drum
11. 3 Pin Plug
12. Spin Drum Cover
13. Spin Timer
14. Agitator Direction Switch
15. Water Inlet - Outlet Knob
16. Water Inlet Knob for Spining
Pulsator: It is a disc, concave in shape used to rotate the cloths in water. Dirt is removed by the
cloth ruby against tub wall surfaces and the disc.
Wash and Spin drum: There are separate tubs or vessels for the washer and the drier. Normally
these tubs are made up of sheet steel coated with zinc to improve rust resistance.. The washing
tub operates at lower speed whereas the spin drier tub operates at a higher speed.
Wash and spin timer: There are two separate timers that enable setting washing and drying
times.
Water inlet control knob: Depending on the quantity of clothes to be washed, the amount of
water is to be filled upto the required water level mark. Near the water inlet point of the washing
there is water inlet control knob used to control inlet water.
Drain pump: Some of the washing machines have a pump for quick removal of water from the
drum for fast operation. This may either be gravity drain method or driven by means of a friction
pulley and lever from the main driver or a separate motor is attached to the same. A small sized
motor with a water pump are used in some washing machines.