초록 ▼

During a heating mode, higher-pressure refrigerant having passed through a condenser within an air-conditioning duct is divided into two portions. One portion is depressurized by a first depressurizing device to an intermediate pressure. Heat exchange is performed in a refrigerant-refrigerant heat e

During a heating mode, higher-pressure refrigerant having passed through a condenser within an air-conditioning duct is divided into two portions. One portion is depressurized by a first depressurizing device to an intermediate pressure. Heat exchange is performed in a refrigerant-refrigerant heat exchanger between the other portion of the higher-pressure refrigerant having just passed through the condenser and the intermediate-pressure refrigerant having just passed through the first depressurizing device. During the heating mode, the higher-pressure refrigerant cooled in refrigerant-refrigerant heat exchanger 23 is supercooled by a supercooling device within the air-conditioning duct. Then, the supercooled higher-pressure refrigerant is depressurized by a second depressurizing device to a lower pressure, thereby vaporized in an outdoor heat-exchanger.

대표청구항 ▼

[ What is claimed is:] [1.]1. 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

[ What is claimed is:] [1.]1. 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.