Heating and cooling system for motor vehicles

Details Heating and cooling system for motor vehicles Heating and cooling system for motor vehicles

1987-02-27

1989-04-18

Davis, Jr., Albert W.

Heat exchange

With alarm, indicator, signal, register, recorder, test or...

Remotely controlled inspection means

165 29, 165 43, 237 2A, 237 123B, 98 201, 98 208, 98 209, B60H 300, F25B 2900

Patent

active

048217921

ABSTRACT:
In a heating and air-conditioning installation for motor vehicles with a cooling-medium circulatory system for the engine and with a reversible refrigerant circulatory system adapted to be shifted from cooling to heating, a control device is provided which in dependence on the adjustments of the operating elements for defrosting and/or heating, automatically engages the heating operation of the refrigerant circulatory system at outside temperatures below or slightly above the freezing point and which upon reaching a sufficiently high temperature of the engine cooling-medium automatically shifts to heating operation exclusively by means of the cooling-medium circulatory system.

REFERENCES:
patent: 3690549 (1972-09-01), Hardy
patent: 3777975 (1973-12-01), Kofink
patent: 4143706 (1979-03-01), Schnaibel et al.
patent: 4350287 (1982-09-01), Richards
patent: 4384608 (1983-05-01), Scarlett et al.
patent: 4412424 (1983-11-01), Iida et al.
patent: 4653689 (1987-03-01), Sakurai et al.

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