About 13 results
https://drivepatents.com/patents/1069602 · 1 Mar 2006
A control circuit for multiple electrical loads (52) has a power switch (51) associated with each load (52) for adjusting the current supplied to the load, and a control unit for driving the power semiconductor. The control circuit includes a monitoring de...
https://drivepatents.com/patents/1069545 · 1 Mar 2006
The electric heater, especially as an auxiliary heater for motor vehicles, includes a PTC heating element (52), a power semiconductor (51) to establish the current fed to the PTC heating element, and a control unit (50) to control the power semiconductor. ...
https://drivepatents.com/patents/1074919 · 17 Aug 2005
The electrical heater, as an additional motor vehicle heater unit, has an open housing. The housing contains a layered structure (80) with at least one radiator (74), at least one heating unit (81) with at least one positive temperature coefficient (PTC) h...
https://drivepatents.com/patents/1079078 · 23 Mar 2005
Control circuit for operation of an electrical heating device (100), especially an auxiliary heater for a motor vehicle, whereby the heater comprises PTC heating elements and a temperature sensor (170), which measures the temperature of air flowing into th...
https://drivepatents.com/patents/1082201 · 24 Nov 2004
The device has an air suction opening, at least one blow-out opening, a radial blower connected on the input side to the air suction opening, a heating register (11) with electrical heating resistances, an electronic controller (12) and temperature sensors...
https://drivepatents.com/patents/1083414 · 6 Oct 2004
The seat has a seat upholstery part in an essentially horizontal sitting surface and an essentially vertical back rest part and an air transmissive, active breathing surface covering facing the accommodated body. A textile (4) under the covering has an air...
https://drivepatents.com/patents/1084321 · 1 Sep 2004
An electric heater, especially for additional heating in motor vehicle climate control, comprises positive temperature coefficient (PTC) heating elements in a plane with a radiator and current flow contact strips and arranged in separately controlled group...
https://drivepatents.com/patents/1086078 · 23 Jun 2004
The sides of the half housings are airflow transparent formed by horizontal (10) and vertical (9) bars and are clamped together with the PTC elements enclosed after which a contact spring strip (12) may be inserted before completing the assembly with an en...
https://drivepatents.com/patents/1087360 · 6 May 2004
A control device is set up so that, when individual heater elements are triggered, allocation of separately adjustable heat output can be altered on the individual heater elements in preset time intervals. Altering the allocation constitutes a permutation ...
https://drivepatents.com/patents/1089218 · 3 Mar 2004
The electric heater, in particular, for additional heating of motor vehicles comprises a control unit with power transistors (19) and attached cooling elements (20) which are formed by a cooler body (25) and a heat conductor (24) inserted into the circuit ...