Abstract: An air conditioning device for a seat comprises an air-permeable base body which is fitted under a seat surface, and a heating element fitted in the base body, or between the seat surface and the base body. The base body and the heating element are mat-shaped. They are arranged substantially parallel to each other, and have substantially equal surface areas.

Abstract: In a method and the arrangement for operating an electric seat heating apparatus of a vehicle, it is provided, with a view to optimizing the heat-up behavior, that the given heat-up time or temperature, respectively, being reached, the heating power is preset by a microprocessor as a function of a field of characteristic curves or tables stored in a non-volatile memory such that for seats that differ in size, upholstery, and surface quality, the optimally to be supplied heating power or heating time, respectively, is empirically detected as a function of the desired seat temperature on the surface of the seating face or the rear and is stored in the non-volatile memory in the form of curves or tables, that a curve or table is selected from the field of characteristic curves or tables, respectively, by the microprocessor as a function of a coding recorded by the microprocessor, of the respective seat to the heated, and that then the power supply to the respective seat to be actually heated takes place in accor

Abstract: The conditioned seat, has at least one seat contact surface (31), the outer side of which faces towards part of a passenger in the seat. An air-conditioning device (18) supplies conditioned air to the region of the inner side of the seat contact surface (31). An electrical heating element (24) is arranged in the region of the inner side of the seat contact surface (31) for warming the seat contact surface (31). A temperature sensor (28) detects the temperature in the region of the seat contact surface (31). For achieving a fast adjustment of the seat temperature to a preset desired temperature independent from the ambient temperature a controlling system (20) is provide which is in connection both with the air-conditioning device (18) and with the electrical heating element (24) and controls these corresponding to a pre-set desired temperature value in dependence on the temperature measured by the temperature sensor (28).

Abstract: The electric steering-wheel heating element to be mounted on a steering wheel rim has a linear center region made of flat ribbon-shaped, electrically conductive material. A first side region and a second side region made of flat ribbon-shaped, electrically conductive material each have at least one curved side segment and. The shape of the center region and of the curved side segments is configured such that, after mounting, the center region covers an external circumferential region of the steering wheel rim, the first side region alongside a longitudinal side of the center region covers a side circumferential region on one side of the steering wheel rim and the second side region alongside the other longitudinal side of the center region covers a side circumferential region on the other side of the steering wheel rim.

Abstract: Fast and highly sensitive monitoring of electrical resistance-type heating elements of seat heaters in automotive vehicles is achieved by short-time breaking of the power supply to the electrical resistance-type heating element and coupling the electrical resistance-type heating element during this interruption to an electrical measuring section for applying to the electrical resistance-type heating element a measuring current which is significantly lower than the heating current. A controlling and monitoring circuit operating in this way permits testing of the electrical resistance-type heating element for a plurality of types of faults within a wide range of operating conditions.

Abstract: Improved vehicle seats can be made in a process in which the seat-covering material and a flat heater are inserted into a negative mold for a vehicle seat and the mold is filled with in-situ foam because the flat carrier for the heating conductor of the heater is constituted by a braided wide-mesh grid made of plastic strings or plastic yarns, which during the filling of the negative mold for vehicle seats with in-situ plastic foam are surrounded by the foam substantially without a change of the porosity of the plastic foam.