Moulinex Sa

Mustapha Arroubi

Jean-Luc Alain Henri Leroy

Lionel Durand

A temperature sensor includes a semiconductor wafer ( ) with a recess wherein is placed a sensitive element ( ) which is heated in response to a target infrared radiation, and thermal insulating layer ( ) provided between the sensitive element ( ) and the wafer ( ), a thermoelectric element ( ) which generates a first electric signal (V ) representing the difference between the target temperature and a reference temperature, and a device sensing temperature by contact ( ), transmitting a second signal (V ) representing the reference temperature. The sensor includes an electronic device for processing the signals (V , V ) transmitted by the thermoelectric element ( ) and the device sensing temperature by contact ( ), this device consisting of component formed in the semiconductor wafer ( ).

Temperature sensor and electrical household appliance comprising same

The invention concerns a method for varying and regulating the speed of a motor powered from a voltage source via a triac, comprising, at least once every alternating voltage interval, the following steps: computing a surface value (S,) corresponding to the current absorbed (I(M)) in a time window (FT) defined between a current switching-on time (t,) and a following current switching-off time (t,); computing an interval of the next triac-blocking time (t&prime;); and controlling the starting of the triac when the blocking time (t&prime;) has elapsed. The invention is useful in particular for household electric and house automation appliances operating at variable speed.

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Villons les Buissons, France

Mustapha Arroubi