VEHICLE HEAT PUMP SYSTEM AND CONTROL METHOD THEREFOR

    公开(公告)号:US20240262166A1

    公开(公告)日:2024-08-08

    申请号:US18284881

    申请日:2022-04-25

    Applicant: Hanon Systems

    CPC classification number: B60H1/00914 B60H1/00278 B60H1/3207

    Abstract: Disclosed in the present invention is a vehicle heat pump system capable of improving dehumidification performance by increasing the flow of a refrigerant toward an evaporator during heating and dehumidifying modes. The vehicle heat pump system comprises: a bypass line which branches off between a first expansion valve and an outdoor heat exchanger and bypasses through the outdoor heat exchanger and the evaporator; a first refrigerant flow control valve for adjusting the opening degree between the bypass line and a refrigerant line toward the outdoor heat exchanger; a dehumidification line branching off between the first expansion valve and the first refrigerant flow control valve to supply the refrigerant to the evaporator; and a control unit for controlling the amount of refrigerant supplied to the dehumidification line according to outdoor air temperature or compressor RPM.

    HEAT PUMP SYSTEM FOR VEHICLE AND METHOD FOR CONTROLLING SAME

    公开(公告)号:US20240174053A1

    公开(公告)日:2024-05-30

    申请号:US18283056

    申请日:2022-04-12

    Applicant: Hanon Systems

    CPC classification number: B60H1/3213 B60H1/00885 B60H1/00899

    Abstract: Heat pump system for a vehicle and method for controlling same, which can, during mode changing between air heating and conditioning, prevent noise and vibration due to a pressure difference between refrigerants and reduce delay time. Heat pump system comprises a compressor compressing and discharging refrigerant, an indoor heat exchanger in air conditioning case, causing the refrigerant discharge from the compressor to heat the air, a first expansion valve for selectively expanding the refrigerant passed through the indoor heat exchanger, an evaporator in air conditioning case, enabling refrigerant to exchange heat with air evaporating refrigerant, and a controller for controlling the opening degree of the first expansion valve during mode changing between air heating and conditioning, wherein the controller turns off the compressor and gradually opens the first expansion valve to increase the opening degree when the mode is changed from the heat pump mode to the air conditioning mode.

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