Patent ID: 7066245
Filing Date: 2006-06-27
Classification: B60H,B60K,F25B,Y02T

Abstract:
1. An on-vehicle air-conditioner for air-conditioning a car interior comprising a passenger cabin, comprising: a refrigeration circuit operative to cool and to heat the passenger cabin, the refrigeration circuit including a refrigerant flowing in the refrigeration circuit, the refrigerant on a portion of the refrigeration circuit in heat exchange relationship with air in the passenger cabin, the refrigeration circuit further including a heat exchanger disposed in front of an engine within the car shell and exterior to the passenger cabin, the refrigerant flowing in the heat exchanger in heat exchange relationship with exterior air; and a first duct installed in front of the heat exchanger, the first duct openable and closable to regulate inflow of exterior air passing over said heat exchanger; a second duct installed behind the heat exchanger, the second duct openable and closable to regulate inflow of exterior air passing over said heat exchanger; at least one of said first duct and said second duct is controllable to be in a closed state, wherein said refrigeration circuit is operative to defrost frost deposited on said heat exchanger by using the refrigeration circuit for heating when at least one of said first duct and said second duct is in the closed state; and a fan controllable to operate at a lower speed of rotation by reverse rotation, the fan reversible flow disposed to direct air that has been heated due to cooling an engine, a motor or a motor driving circuit through said heat exchanger.