Air conditioning apparatus for vehicle

Details Air conditioning apparatus for vehicle Air conditioning apparatus for vehicle

1995-04-24

1996-02-27

Wayner, William E.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62 80, F25D 2100

Patent

active

054938708

ABSTRACT:
An air conditioning apparatus includes an air duct having an inlet and an outlet supplying conditioned air, and an air conditioner for cooling and heating air using a refrigeration cycle. In the refrigeration cycle, the air conditioner includes a first heat exchanger, a second heat exchanger disposed on a downstream side of the first heat exchanger, and a compressor. The air conditioner selectively operates in a cooling mode where cool air cooled by the first heat exchanger is supplied through the outlet of the air duct, in a heating mode where hot air heated by the first heat exchanger is supplied through the outlet of the air duct, and in a dehumidifying mode where air cooled by the first heat exchanger and subsequently heated by the second heat exchanger is supplied through the outlet of the air duct. In order to prevent frosting of the heat exchanger functioning as an evaporator, a temperature sensor just downstream of the first heat exchanger in conjunction with a timer and control arrangement increase the evaporator temperature if it is below a set lower limit for a set period of time.

REFERENCES:
patent: 5355690 (1994-10-01), Iritani et al.

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