Disclosed are a heat pump system for a vehicle and a control method thereof, which can control the expansion level in accordance with a heating load, and simultaneously secure control stability. The heat pump system for a vehicle comprises: a compressor which compresses and discharges a refrigerant; a first heat exchanger which makes the refrigerant discharged from the compressor radiate heat; a heating pressure reduction unit which reduces the pressure of the refrigerant discharged from the first heat exchanger; a second heat exchanger which makes the refrigerant discharged from the heating pressure reduction unit exchange heat with a heat medium; an evaporator which makes the refrigerant returning to the compressor absorb heat; and a heat absorption pressure reduction unit which reduces the pressure of the refrigerant introduced into the evaporator. The heating pressure reduction unit includes: a refrigerant expansion level varying means which is configured to vary the expansion level of the refrigerant; and a control unit which varies the expansion level of the refrigerant expansion level varying means in accordance with the heating load.

    난방 부하에 따른 팽창도 조절이 가능함과 동시에 제어의 안정성을 확보할 수 있는 차량용 히트펌프 시스템 및 이의 제어방법이 개시된다. 차량용 히트펌프 시스템은 냉매를 압축해 토출하는 압축기와, 상기 압축기에서 토출된 냉매를 방열시키는 제1 열교환기와, 상기 제1 열교환기에서 배출된 냉매를 감압시키는 난방용 감압부와, 상기 난방용 감압부에서 배출된 냉매를 열매체와 열교환시키는 제2 열교환기와, 상기 압축기로 복귀하는 냉매를 흡열시키는 증발기와, 상기 증발기로 유입되는 냉매를 감압시키는 흡열용 감압부를 포함하고; 상기 난방용 감압부는 냉매의 팽창도를 가변하도록 구성된 냉매 팽창도 가변수단으로 이루어지며; 난방 부하에 따라 상기 냉매 팽창도 가변수단의 팽창도를 가변시키는 제어부가 구비된다.


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    Title :

    HEAT PUMP SYSTEM FOR VEHICLE AND CONTROL METHOD THEREOF


    Additional title:

    차량용 히트펌프 시스템 및 이의 제어방법


    Contributors:
    BYON SANG CHUL (author) / KIM TAE WAN (author) / KANG BOK SUN (author) / SEO YONG EUN (author) / EOM SAE DONG (author) / LEE JONG GON (author) / LEE TAE GUN (author) / HWANG SANG IL (author)

    Publication date :

    2021-09-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht



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