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. SOI/DT 2002-05 eb 20 599 35 23-17