D - Textiles – Paper – 06 – F
Patent
D - Textiles, Paper
06
F
141/53
D06F 33/02 (2006.01) D06F 39/08 (2006.01)
Patent
CA 1331948
ABSTRACT: Washing machine with improved pump control device for closing a valve, in particular a flap valve, for detergent economy, and control device suited for use in a washing machine. A washing machine comprising a tub (104), a solenoid valve (3) for the water feed into the tub (104), a discharge pipe (103), a delivery pipe (107), a pump (101) and a valve preferably of flap type (102) for detergent economy located at the mouth of the discharge pipe (103) at the tub (104), said washing machine (100) comprising a control device (1) for pulse-operating the pump(101) to create a water head in the discharge pipe (103) which is able to close said valve (102), said device (1) comprising a resistor (2) the resistance of which varies directly as a function of its temperature and which is connected in parallel with the solenoid valve (3) and in series with said pump (101), the device (1) for pulse-operating the pump (101) further comprising: means (14) which dissipate heat when traversed by current and which thermally coupled with the variable resistor (2), said means (14) maintaining the temperature of said resistor (2) relatively high so that its resistance remains high during the operating stages of the washing machine (100) subsequent to starting.
603204
Guarino Luciano
Tarrano Vincenzo
Fetherstonhaugh & Co.
Whirlpool International B.v.
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