Abstract: In an apparatus for wirelessly transmitting the temperature and an identifying characteristic of a cooking pot placed on one of the cooking zones of a stove to an electronic transmitting-receiving arrangement of the stove, the aim is to make it unnecessary to produce an operating voltage on the cooking pot. An antenna arrangement 4 of an electronic transmitting-receiving arrangement 14 is arranged under a cooking zone 2. A surface wave sensor 6 is exposed to the temperature of the cooking pot 5 and carries an identifying characteristic in the arrangement of its reflectors 11.
Abstract: There is proposed a heating conductor for a radiant heating body of a cooking hob, which is substantially formed from heating limbs (2) which are cut out of a metal foil or sheet in a geometrical pattern and inserted between the cooking hob and an insulating bottom (20). The heating limbs (2) have holding tongues (1) for fixing the heating limbs in holding portions (5) of the radiant heating body or in portions of the insulating bottom (20). The holding tongues (1) have substantially integrated fixing devices. Also described are certain advantageous arrangements and configurations of the heating conductors.
Abstract: A rotary speed control circuit for feeding a dc universal motor for driving a washing machine. A rectifier and a smoothing capacitor derive the operating voltage of the motor from the mains ac voltage and provided for control of the rotary speed is a regulating device (R) which controls a power stage for the motor, the power stage including a power switch (TR1) and a commutation diode (D1) in the topology of a low-setting device. The power stage feeding the motor includes a high-setting inductor (L) and can be switched over from the topology of a low-setting device to the topology of a high-setting device.
Abstract: Proposed is a temperature measuring device for a regulating circuit (10) in particular of an electrical radiant heating appliance with a heating conductor (2) arranged beneath a glass ceramic cooking surface (1), in which the heating conductor (2) itself suffices for temperature detection. There is provided a change-over switch (6) which cyclically connects the heating conductor (2) to a resistance measuring circuit (7). It detects the respective temperature-dependent ohmic resistance value of the heating conductor (2) and produces a temperature-proportional control signal for the regulating circuit (10).
January 31, 1997
Date of Patent:
September 14, 1999
AKO-Werke GmbH & Co. KG
Roman-Hartmut Wauer, Berndt Gierer, Pia Krause
Abstract: There is provided a radiant heating body (1) in which the temperature sensor (thermocouple element 12) of a temperature limiter is fitted at the hottest point on the underside of a glass ceramic plate (3). By virtue of that specific arrangement of the temperature sensor (12), with each type of heating arrangement, temperature measurement is effected directly at the hottest type-specific point. The temperature sensor (12) is desirably fitted in a ceramic tube (15) in order electrically to insulate it and to shield it from ambient heat.
Abstract: A heating element with a radiant heating body for glass ceramic hobs, including four heating conductors which extend substantially concentrically and parallel to each other; and a ten-stage switch for switching said heating conductors through the intermediary of five output terminals.
Abstract: An output power regulating device for a radiant heating arrangement (2) having a temperature sensor (3) for detecting the temperature of the cooking surface (1), and a preselector (4), is to be so designed that it only supplies the required amount of energy to the radiant heating arrangement (2) in dependence on the thermal loading. For that purpose a microcontroller (10) cyclically detects the variation in respect of time of the actual temperature and the deviation thereof from the reference value. A memory (12) contains a value matrix for the possible pairs in respect of the variation and the deviation in the actual temperature. The microcontroller (10) takes the appropriate regulating value from the value matrix and with that value controls the radiant heating arrangement (2).