Engine heat pump

Abstract

PURPOSE: To improve the heat balance of refrigerant when the load of the refrigerant cannot be met in the case where one heating expansion valve, and one external heat exchanger are provided, while a plurality of internal heat exchangers 7 are provided in an engine heat pump. CONSTITUTION: During a heating operation, a heating expansion valve A is provided in parallel with a part of an external heat exchanger as an evaporator 6. In the heating expansion valve A, a change-over solenoid valve 9 is provided. The change-over solenoid valve 9 is adapted to be turned on and off depending on engine rotating speed and outside air temperature. COPYRIGHT: (C)1992,JPO&Japio

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