US 12,220,966 B2
Heat pump system for vehicle
Jeawan Kim, Hwaseong-si (KR); Hochan An, Hwaseong-si (KR); Yeonho Kim, Seoul (KR); Man Hee Park, Suwon-si (KR); Yeong Jun Kim, Incheon (KR); Jae Yeon Kim, Hwaseong-si (KR); and Hoyoung Jeong, Daegu (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 Nov. 9, 2022, as Appl. No. 17/983,983.
Claims priority of application No. 1020220077818 (KR), filed on Jun. 24, 2022.
Prior Publication US 2023/0415539 A1, Dec. 28, 2023
Int. Cl. B60H 1/00 (2006.01); B60H 1/14 (2006.01)
CPC B60H 1/00278 (2013.01) [B60H 1/00328 (2013.01); B60H 1/00885 (2013.01); B60H 1/143 (2013.01); B60H 2001/00307 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A heat pump system for a vehicle, comprising:
a first cooling device including a first radiator, a first water pump, and a first valve connected by a first coolant line and configured to circulate a first coolant on the first coolant line to cool at least one electrical device provided on the first coolant line;
a second cooling device including a second radiator and a second water pump connected by a second coolant line, and configured to circulate a second coolant on the second coolant line;
a third cooling device including a third coolant line connected to the second cooling device through the first valve, a third water pump provided on the third coolant line, and a battery module and configured to selectively circulate the second coolant on the third coolant line;
a chiller provided on the third coolant line, connected to a refrigerant line of an air conditioner through a refrigerant connection line, and configured to exchange heat between the second coolant selectively introduced through the third coolant line and a coolant selectively supplied from the air conditioner to control a temperature of the second coolant circulated on the third coolant line; and
a gas injection device configured to selectively expand a refrigerant supplied from an internal condenser included in the air conditioner and supply the expanded refrigerant to a heat exchanger of the air conditioner, and selectively supply a portion of the refrigerant to a compressor in the refrigerant supplied from the internal condenser to the compressor to increase a flow rate of the refrigerant circulated on the refrigerant line, wherein the heat exchanger is connected to the first coolant line and the second coolant line, respectively, so that the first coolant and the second coolant are configured to pass through, wherein the gas injection device comprises:
a gas-liquid separator separating a gas refrigerant and a liquid refrigerant among the refrigerants introduced thereinto and selectively discharging the gas refrigerant and the liquid refrigerant;
a supply unit connected to the internal condenser through the refrigerant line so that the refrigerant supplied from the internal condenser is configured to be introduced to the supply unit;
a first expansion valve between the gas-liquid separator and the supply unit configured to selectively expand the refrigerant supplied to the supply unit and supply the expanded refrigerant to the gas-liquid separator;
a second expansion valve between the gas-liquid separator and the supply unit configured to selectively expand the refrigerant supplied to the supply unit and supply the expanded refrigerant to the heat exchanger or supply the refrigerant supplied from the gas-liquid separator to the heat exchanger; and
a supply line connecting the gas-liquid separator and the compressor, and configured to selectively supply a gaseous refrigerant from the gas-liquid separator to the compressor.