Air conditioner for a vehicle

Details Air conditioner for a vehicle Air conditioner for a vehicle

1996-03-19

1997-12-23

Bennett, Henry A.

Heating systems

Automatic control

Heat source is a reverse cycle refrigerating system or heat...

237 123A, 454 75, G05D 2300

Patent

active

056999607

ABSTRACT:
An air conditioner for a vehicle which prevents backflow of outside air into a vehicle interior. An inside/outside air switching damper of the air conditioner for a vehicle is connected to a servo motor by a link. Due to driving of the servo motor, the inside/outside air switching damper swings between an inside air position, at which the inside/outside air switching damper closes an inside air passage side opening, and an outside air position, at which the inside/outside air switching damper closes an inside air suction opening. The servo motor is connected to an amplifier for control. An inside/outside air mode switch, a blowout opening mode switch, a vehicle speed sensor, and a blower voltage detecting circuit are connected to the amplifier for control. When a ram pressure generated when a vehicle is traveling becomes greater than a blower discharge pressure, the inside/outside air switching damper closes the inside air suction opening and outside air is introduced into an inside air passage through a bypass duct.

REFERENCES:
patent: 4437391 (1984-03-01), Eguchi et al.
patent: 4779672 (1988-10-01), Seikou et al.
patent: 5211603 (1993-05-01), Tanaka et al.
patent: 5309731 (1994-05-01), Nonoyama et al.
Suzuki Tadashi, "Air Conditioner", Patent Abstracts of Japan, No. JP6255341, Sep. 13, 1994, page 1/1.

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