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Vehicle air conditioner

  • US 20050045322A1
  • Filed: 08/26/2004
  • Published: 03/03/2005
  • Est. Priority Date: 08/27/2003
  • Status: Active Grant
First Claim
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1. An air conditioner for a vehicle having a compartment, the air conditioner comprising:

  • an air conditioning duct through which air flows into the compartment;

    a cooling heat exchanger, disposed in the air conditioning duct, for cooling and dehumidifying air in the air conditioning duct in accordance with operation of a compressor;

    a temperature detection unit which detects a temperature of air cooled in the cooling heat exchanger;

    a humidity detection unit which detects a humidity of air passing a ventilation passage through which air inside the compartment is ventilated in accordance with an air flow amount in the air conditioning duct; and

    a controller which controls the compressor so that the temperature detected by the temperature detection unit approaches a target cooling temperature, wherein;

    when the air flow amount in the air conditioning duct is equal to or larger than a predetermined amount, the controller calculates the target cooling temperature of air to be cooled by the cooling heat exchanger, for defogging a windshield of the vehicle, based on the humidity detected by the humidity detection unit; and

    when the air flow amount in the air conditioning duct is lower than the predetermined amount, the controller calculates the target cooling temperature for defogging the windshield based on a set humidity higher than the humidity detected by the humidity detection unit.

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