Control circuit for a vehicle air conditioning system

Details Control circuit for a vehicle air conditioning system Control circuit for a vehicle air conditioning system

1996-03-28

1997-07-01

Tanner, Harry B.

Refrigeration

With indicator or tester

Diverse function indicators or testers

165204, B60H 132

Patent

active

056426267

ABSTRACT:
The invention is directed to a control circuit for a vehicle air conditioning system which includes a compressor and a plurality of vents. A plurality of mode switches are provided for shifting the vents in accordance with a plurality of control modes including a defroster mode. When one of the mode switches is turned on, the rest of them are turned off. Each mode switch has a first switching section and a second switching section. A third switching section is formed by contacts which are provided at the "off" side of one of the first and second switching sections in the rest of the mode switches, and which are connected in series. With the first, second and third switching sections operated, are connected or disconnected a defroster circuit, a compressor circuit, a first indicator circuit for indicating a condition of the compressor being activated, and a second indicator circuit for indicating a defroster mode. For example, the first switching section is provided for connecting or disconnecting the first indicator circuit and the second indicator circuit. The second switching section is provided for connecting or disconnecting the compressor circuit. And, the third switching section is provided for connecting or disconnecting the defroster circuit.

REFERENCES:
patent: 4762169 (1988-08-01), Andersen et al.
patent: 4791981 (1988-12-01), Ito
patent: 4827730 (1989-05-01), Doi et al.
patent: 5152335 (1992-10-01), Doi et al.
patent: 5220805 (1993-06-01), Fukudomi
patent: 5230467 (1993-07-01), Kubsch et al.

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