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4 FRONT-LOADING WASHING MACHINE
1. Timer
2. Detergent dispenser
3. Steam venting hose
4. Pressure switch
5. Tub suspension spring
6. Tub
7. Detergent entry tube
8. Tube between solenoid and
detergent dispenser
9. Water fill solenoid
10. Water fill hose
11. Rear counterweight
12. Drum pulley
13. Bearings
14. Thermostat
15. Heating element
16. Drain hose
17. Motor pulley
18. Motor
19. Damper
20. Drain pump
21. Pressure chamber
22. Drain filter
23. Tube between tub and filter body
24. Door safety interlock
25. Porthole door
26. Bellows seal
27. Front counterweight
28. Drum
4.1 Traditional washing system
In a washing machine, the dirt in the fibres is removed by a combination of mechanical and chemical
actions.
The solenoid valve ducts water through the detergent dispenser, where it collects the detergent and passes
into the tub. The correct water level is controlled by one or more pressure switches.
The fabrics loaded into the drum are maintained in constant movement by the rotation of the drum.
The particles of dirt, after being separated from the fibres of the fabric by the chemical action of the
detergent and the temperature of the water, are removed by the passage of the water through the fibres.
This action is obtained by a continuous series of immersions and agitations of the fabrics in the washing
solution.
The heating element is switched on until the selected temperature is reached; the temperature of the water
is controlled by thermostats or sensors.
At the end of the washing cycle, the dirty water is drained by the drain pump.
20
SOI/DT 2002-05 eb
599 35 23-17
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