Patent ID: 6679079
Filing Date: 2004-01-20
Classification: B60H

Abstract:
An air conditioning system for a vehicle (8), comprising:a hot gas heater cycle (H) for heating air blown into a passenger compartment by directly introducing a discharged gas refrigerant from a compressor (10) in a refrigerating cycle (C) into an interior heat exchanger (24); and a plurality of heat enhancing means including the hot gas heater cycle (H) as a heat enhancing means for enhancing a vehicle (8) passenger compartment heating ability, wherein when a heating load is large, the plurality of heat enhancing means are activated, and when the heating load is decreased to or below a first predetermined value, the hot gas heater cycle (H) is deactivated; the hot gas heater cycle is deactivated when the heating load is decreased to or below the predetermined value; an electric heater is included as the heat enhancing means other than the hot gas heater cycle; and when the heating load is decreased to or below a second predetermined value, the electric heater is deactivated, said first predetermined value being greater than said second predetermined value.