Temperature control apparatus of air conditioner for automobiles

Details Temperature control apparatus of air conditioner for automobiles Temperature control apparatus of air conditioner for automobiles

1976-02-05

1977-07-26

Wayner, William E.

Heat exchange

Movable heating or cooling surface

Rotary drum

91365, 236 82, 237 123B, F25B 2900

Patent

active

040376516

ABSTRACT:
A temperature control apparatus of an air conditioner for automobiles, which comprises a blower for feeding air through a cooling unit and a heating unit disposed in an air passage, an air mix door for controlling the amount of air passing through the heating unit, an actuator for actuating said door, a negative pressure source for applying a negative pressure to said actuator through a controller, a sensor emitting a negative pressure signal in response to the temperature in a cab of an automobile and a regulator emitting a negative pressure signal in response to the change of the position of said door, wherein the output negative pressure signal of the temperature sensor is compared with the output negative pressure signal of the regulator by said controller and a negative pressure is applied to the actuator according to a deviation between said two output signals to control the degree of opening of said air mix door so as to maintain the temperature in the cab at a substantially constant level.

REFERENCES:
patent: 2225321 (1940-12-01), Schwendner et al.
patent: 2298112 (1942-10-01), Edwards et al.
patent: 2789543 (1957-04-01), Popowsky
patent: 2947286 (1960-08-01), Baltus et al.
patent: 3151810 (1964-10-01), Puster
patent: 3809314 (1974-05-01), Engleke et al.
patent: 3877638 (1975-04-01), Amano et al.

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