Patent ID: 6105375
Filing Date: 2000-08-22
Classification: B60H,F25B

Abstract:
A refrigerating cycle apparatus comprising:a compressor for compressing and delivering a refrigerant;a condenser for condensing the refrigerant compressed by the compressor;a first pressure-reducing device for reducing in pressure the refrigerant condensed by the condenser;an evaporator for evaporating the refrigerant reduced in pressure by the first pressure-reducing device;a hot gas bypass conduit directly connecting a delivery side of the compressor to an inlet side of the evaporator;a second pressure-reducing device provided in the hot gas bypass conduit for reducing in pressure gas refrigerant compressed by the compressor;valves for switching a connection between the delivery side of the compressor and an inlet side of the condenser, and a connection between the delivery side of the compressor and an inlet side of the hot gas bypass conduit;wherein a normal cooling mode is carried out with the inlet side of the condenser opened and the inlet side of the hot gas bypass conduit closed by the valves, and a hot gas bypass heating mode is carried out with the inlet side of the condenser closed and the inlet side of the hot gas bypass conduit opened by the valves; anda controller for recovering refrigerant from the condenser side to the evaporator side upon starting of the heating mode, the controller causing the refrigerant to be recovered by operating the compressor with at least the inlet side of the hot gas bypass conduit closed by the valves.