EP 0740008 A3 19980128 - Safety switching apparatus against dry operation of electrical heating resistances, particularly for washing machines and dishwashers
Title (en)
Safety switching apparatus against dry operation of electrical heating resistances, particularly for washing machines and dishwashers
Title (de)
Sicherheitsschalteinrichtung für das trockengehen elektrischer Heizwiderstände insbesondere für Waschmaschinen oder Geschirrspülmaschinen
Title (fr)
Dispositif de coupure sécurité contre la marche à sec des résistances électriques en particulier pour les machines à laver et les lave-vaiselle
Publication
Application
Priority
DE 19515902 A 19950429
Abstract (en)
[origin: EP0740008A2] The invention relates to a safety switching apparatus against dry operation of electrical resistances, particularly for washing machines and dishwashers, with electromechanical or electronic control systems and level switches for monitoring the water level. Security against dry operation of the heating resistances is considerably improved in that two level switches monitor the normal water level and, incorporated in series, control a switch element, in that the switch element triggers the control motor and switches off the water intake valve, and in that the control motor, after expiry of a predetermined time, by means of control contacts, switches the heating resistance into parallel with the switch element in the heating and washing stage following the water intake stage. <IMAGE>
IPC 1-7
IPC 8 full level
A47L 15/42 (2006.01); D06F 39/04 (2006.01)
CPC (source: EP US)
A47L 15/4285 (2013.01 - EP US); D06F 37/42 (2013.01 - EP US); D06F 39/04 (2013.01 - EP US); D06F 34/08 (2020.02 - EP US); D06F 2103/18 (2020.02 - EP US); D06F 2105/28 (2020.02 - EP US)
Citation (search report)
- [AD] DE 3228744 A1 19840202 - MIELE & CIE [DE]
- [A] GB 1282124 A 19720719 - KENWOOD MFG WOKING LTD [GB]
- [A] EP 0452678 A2 19911023 - ZANUSSI ELETTRODOMESTICI [IT]
- [A] DE 1585767 A1 19710729 - KIENINGER & OBERGFELL
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0740008 A2 19961030; EP 0740008 A3 19980128; EP 0740008 B1 20020828; ES 2181820 T3 20030301
DOCDB simple family (application)
EP 96105206 A 19960401; ES 96105206 T 19960401