Device for controlling and restoring the water level in a dishwashing machine

(19)

(11)

EP 0 931 503 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	17.11.1999 Bulletin 1999/46

(43)	Date of publication A2:
	28.07.1999 Bulletin 1999/30

(21)	Application number: 99830017.2

(22)	Date of filing: 20.01.1999

(51)	International Patent Classification (IPC)⁶: A47L 15/42

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

22.01.1998 IT MI980105

(71)	Applicant: SMEG S.p.A.
	Guastalla (Reggio Emilia) (IT)

(72)	Inventor:
	Bertazzoni, Roberto Guastalla (RE) (IT)

(74)	Representative: Concone, Emanuele et al
	Società Italiana Brevetti S.p.A. Via Carducci 8 20123 Milano 20123 Milano (IT)

(54)	Device for controlling and restoring the water level in a dishwashing machine

(57) A device for controlling and restoring the water level in a dishwasher includes an electric valve (EV) for intercepting the water entering the machine, a pressure switch (PS) for controlling the water level in the tank by commanding the opening and closure of the electric valve (EV) according to the detected water level, and water ducts between the electric valve (EV) and the tank which include a compensation chamber (4) in permanent communication with the washing tank through a small emptying hole (6). The water contained in the chamber (4) flows into the tank through the small hole (6) even after the closure of the electric valve (EV), whereby the decrease in the level caused by the pump which stops cavitating and starts to operate again at full flow is compensated by said additional amount of water so that the pressure switch does not intervene again.

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