Vehicle seat with temperature and ventilation control and method

Details Vehicle seat with temperature and ventilation control and method Vehicle seat with temperature and ventilation control and method

1998-02-02

1999-08-10

Cranmer, Laurie K.

Chairs and seats

With heat exchanger or means to provide fluid or vapor...

Electric heating element

2971801, 29718013, A47C 772

Patent

active

059347481

ABSTRACT:
A vehicle seat having seat and backrest cushions includes a ventilation device for ventilating the cushions as well as a heating device for heating the cushions. A desirable sitting climate providing high comfort is produced by eliminating both a seat user's perspiration and overcooling. The desirable sitting climate is assured by a control unit which is connected on an input side with a temperature sensor arranged in a cushion and on an output side with the electric circuits of the ventilation unit and the heating unit. The control unit is adjusted such that, at cushion surface temperatures measured by the temperature sensor which are above an indicated value, it switches on the ventilation device or changes it to a higher power stage and/or switches off the heating device or changes it to a lower heating capacity. At cushion surface temperatures which are below the indicated value, the control unit switches off the ventilation device or changes it to a lower power stage and/or switches on the heating device or changes it to a higher power stage. The control unit may also operate based on an output from a moisture sensor.

REFERENCES:
patent: 4413857 (1983-11-01), Hayashi
patent: 4572430 (1986-02-01), Takagi et al.
patent: 5117638 (1992-06-01), Feher
patent: 5385382 (1995-01-01), Single et al.
patent: 5524439 (1996-06-01), Gallup et al.

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