4 FRONT-LOADING WASHING MACHINE “HEC” 1. Electronic board 2. Detergent dispenser 3. Tub suspension spring 4. Tub 5. Pressure switch 6. Detergent entry tube 7. Tube between solenoid and detergent dispenser 8. Solenoid 9. Water fill hose 10. Rear counterweight 11. Drum pulley 12. Bearings 13. Heating element with NTC 14. Drain hose 15. Motor pulley 16. Motor 17. Damper 18. Drain pump 19. Pressure chamber 20. Drain filter 21. Tube between tub and filter body 22. Eco-ball 23. Door safety interlock 24. Door 25. Door seal 26. Front counterweight 27. Drum 4.1 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 2006-03 dmm 19/70 599 37 67-82