Schaltventil für Heissgasumlauf in einem Kältemittelkreislauf

摘要

A switch valve is provided in a refrigerant circuit. The switch valve includes a first valve mechanism (50), a second valve mechanism (80), and a single valve housing (51) incorporating the first and second valve mechanisms (50, 80). The first valve mechanism (50) is an electromagnetic valve. The first valve mechanism (50) selectively connects and disconnects an outlet of a compressor (10) with an inlet of a condenser (11) in accordance with an electric current supply. The second valve mechanism (80) is a differential pressure valve. The second valve mechanism (80) selectively connects and disconnects the outlet of the compressor (10) with an inlet of an evaporator (14) in accordance with a difference between the pressure at the outlet of the compressor (10) and the pressure at the inlet of the condenser (11). In this manner, the single switch valve, which includes the first and second valve mechanisms (50, 80) incorporated in the same valve housing (51), switches the refrigerant circuit between a path for a cooling operation and a path for a warming operation. This structure simplifies the configuration of the refrigerant circuit.