HEAT PUMP SYSTEM FOR VEHICLE AND METHOD FOR CONTROLLING SAME

WIPO Patent Application WO/2022/220525

A1

Disclosed are a heat pump system for a vehicle and a method for controlling same, which can, during mode changing between a heat pump mode and an air-conditioning mode, prevent noise and vibration due to a pressure difference between refrigerants and effectively reduce delay time. The heat pump system for a vehicle comprises: a compressor for compressing and discharging refrigerant; an indoor heat exchanger provided in an air conditioning case and causing the refrigerant having been discharged from the compressor to exchange heat with air, so as to discharge the heat; a first expansion valve for selectively expanding the refrigerant having passed through the indoor heat exchanger; an evaporator provided in the air conditioning case and enabling refrigerant to exchange heat with air to thus cause the refrigerant to evaporate; and a controller for controlling the opening degree of the first expansion valve during mode changing between a heat pump mode and an air-conditioning mode, 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.

KIM HAK KYU (KR)
KANG BOK SUN (KR)
KIM TAE WAN (KR)

PCT/KR2022/005238

October 20, 2022

April 12, 2022

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HANON SYSTEMS (KR)

B60H1/32; B60H1/00

JP2015223880A	2015-12-14
KR20150041739A	2015-04-17
JP2020097363A	2020-06-25
KR20140114938A	2014-09-30
EP2727754A1	2014-05-07

PARK, Won Yong (KR)

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