US 12,145,425 B2
Heat pump system for vehicle
Jeawan Kim, Hwaseong-si (KR); Hochan An, Hwaseong-si (KR); Wan Je Cho, Hwaseong-si (KR); Hoyoung Jeong, Daegu (KR); Man Hee Park, Suwon-si (KR); Yeong Jun Kim, Incheon (KR); Jae Yeon Kim, Hwaseong-si (KR); and Yeonho Kim, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Dec. 2, 2022, as Appl. No. 18/061,201.
Claims priority of application No. 10-2022-0082313 (KR), filed on Jul. 5, 2022.
Prior Publication US 2024/0010046 A1, Jan. 11, 2024
Int. Cl. B60H 1/00 (2006.01)
CPC B60H 1/00921 (2013.01) [B60H 1/00278 (2013.01); B60H 2001/00307 (2013.01); B60H 2001/00928 (2013.01); B60H 2001/00949 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A heat pump system for a vehicle, the heat pump system comprising:
a cooling apparatus comprising a radiator and a multi-way valve connected by a first coolant line, the cooling apparatus being configured to circulate a coolant in the first coolant line;
a second coolant line comprising a first end and a second end connected to the multi-way valve, the second coolant line being equipped with a first water pump and an electrical component;
a third coolant line comprising a first end and a second end connected to the multi-way valve, the third coolant line being equipped with a second water pump and a battery module;
a chiller provided on the third coolant line, connected to a refrigerant line of an air conditioner device through a refrigerant connection line, and configured to adjust a temperature of the coolant circulated in the third coolant line by heat-exchanging the coolant selectively inflowing through the third coolant line with a refrigerant selectively supplied from the air conditioner device; and
a gas injection device configured to selectively expand the refrigerant supplied from an internal condenser included in the air conditioner device to be supplied to a heat-exchanger connected to the second coolant line and to selectively supply some of the refrigerant supplied from the internal condenser to a compressor to increase a flow rate of the refrigerant circulating in the refrigerant line, wherein the gas injection device comprises:
a gas-liquid separator configured to separate the refrigerant inflowing inside into a gas refrigerant and a liquid refrigerant to be selectively exhausted;
a supply unit connected to the internal condenser through the refrigerant line so that the refrigerant supplied from the internal condenser inflows;
a first expansion valve provided between the gas-liquid separator and the supply unit and configured to selectively expand the refrigerant supplied to the supply unit to be supplied to the gas-liquid separator;
a second expansion valve configured to selectively expand the refrigerant supplied to the supply unit to be supplied to the heat-exchanger and provided between the gas-liquid separator and the supply unit so as to supply the refrigerant supplied from the gas-liquid separator to be supplied to the heat-exchanger; and
a supply line connecting the gas-liquid separator and the compressor and configured to selectively supply the refrigerant in a gas state from the gas-liquid separator to the compressor.