Patent ID: 6981544

Claim:
A vehicle air-conditioning apparatus for use in a vehicle in which an engine for driving the vehicle is stopped when the vehicle comes to a temporary halt from a running state, the apparatus comprising: a cooling unit, which includes a compressor, for cooling air by compressing a refrigerant with the compressor, condensing the compressed refrigerant, expanding the condensed refrigerant, and evaporating the expanded refrigerant; a heating unit for heating the air by using, as a heat source, cooling water circulated by a mechanical pump; a compression unit for compressing the refrigerant; a pump unit for circulating the cooling water; a single motor for driving both the compression unit and the pump unit; and a control unit for controlling operation of the motor, wherein the control unit causes the motor to operate the compression unit if the engine is stopped when the cooling unit is operating and causes the motor to operate the pump unit if the engine is stopped when the heating unit is operating.