Patent ID: 6293123
Filing Date: 2001-09-25
Classification: B60H,F25B

Abstract:
A refrigeration-cycle device comprising:an air-conditioning duct including an inlet drawing air in and an outlet blowing air into a passenger compartment;a blower blowing air into said air-conditioning duct;a compressor having a discharge port for discharging compressed refrigerant, intake port for intaking lower-pressure refrigerant in a refrigeration cycle and a gas-injection port intaking intermediate-pressure gas refrigerant in the refrigerant cycle;a condenser disposed within said air-conditioning duct which heats air with gas refrigerant during a heating mode, the gas refrigerant discharged from said compressor during said heating mode;a first depressurizing device which depressurizes higher-pressure refrigerant to an intermediate pressure refrigerant, said first depressurizing device depressurizing said higher-pressure refrigerant from one of two portions having passed through said condenser during the heating mode;a refrigerant-refrigerant heat exchanger where heat exchange is performed between a second of said two portions of the higher-pressure refrigerant having passed through said condenser and the intermediate-pressure refrigerant having passed said first depressurizing device;a supercooling device disposed within said air-conditioning duct which supercools the higher-pressure refrigerant from said second of said two portions during said heating mode, said supercooling device supercooling by heat exchange between the higher-pressure refrigerant flowing thereinto and air within said air-conditioning duct;a second depressurizing device which depressurizes the higher-pressure refrigerant supercooled in said supercooling device, said second depressurizing device depressurizing said higher-pressure refrigerant to a lower pressure; andan outdoor heat exchanger which evaporates the lower-pressure refrigerant having passed through said second depressurizing device during the heating mode;wherein intermediate-pressure gas refrigerant is introduced into said gas-injection port of said compressor, the intermediate-pressure gas refrigerant being vaporized by heat exchange in said refrigerant-refrigerant heat exchanger during said heating mode.