US 12,441,162 B2
Heat pump system for vehicle
Jeawan Kim, Hwaseong-si (KR); Jae Yeon Kim, Hwaseong-si (KR); and Man Hee Park, Suwon-si (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 Sep. 27, 2023, as Appl. No. 18/373,515.
Claims priority of application No. 10-2023-0072403 (KR), filed on Jun. 5, 2023.
Prior Publication US 2024/0399824 A1, Dec. 5, 2024
Int. Cl. B60H 1/00 (2006.01)
CPC B60H 1/00899 (2013.01) 17 Claims
OG exemplary drawing
 
1. A heat pump system for a vehicle, comprising:
a compressor configured to compress a refrigerant;
a HVAC module having an internal condenser and an evaporator connected to the compressor through a refrigerant line, further having an opening and closing door configured to adjust air that passes through the evaporator to flow into the internal condenser, according to a cooling mode or a heating mode of the vehicle;
a heat-exchanger connected to the internal condenser through the refrigerant line, the heat-exchanger being configured to heat-exchange the refrigerant supplied from the internal condenser with air to condensate or evaporate the refrigerant;
a first expansion valve positioned on the refrigerant line between the heat-exchanger and the evaporator;
a gas injection device connected to the refrigerant line between the internal condenser and the heat-exchanger, the gas injection device being configured to expand and flow the refrigerant supplied from the internal condenser or the heat-exchanger, and to supply a portion the supplied refrigerant to the compressor to increase a flow rate of the refrigerant circulating the refrigerant line;
a first refrigerant connection line having a first end connected to the refrigerant line between the compressor and the evaporator, and a second end connected to the refrigerant line between the heat-exchanger and the evaporator; and
a chiller positioned on the first refrigerant connection line, the chiller being configured to adjust temperature of the coolant by heat-exchanging the refrigerant introduced through the first refrigerant connection line with a coolant;
wherein the gas injection device further comprises:
a gas-liquid separator configured to separate and discharge a gas refrigerant and a liquid refrigerant from an introduced refrigerant;
a second expansion valve positioned on the refrigerant line between the internal condenser and the heat-exchanger;
a first line having a first end connected to the second expansion valve and a second end connected to the gas-liquid separator, the first line being configured to supply the refrigerant supplied from the internal condenser to the gas-liquid separator according to an operation of the second expansion valve;
a second line having a first end connected to the refrigerant line between the second expansion valve and the heat-exchanger, and a second end connected to the refrigerant line between the heat-exchanger and the evaporator;
a third expansion valve positioned on the second line;
a third line having a first end connected to the third expansion valve, and a second end connected to the gas-liquid separator;
a fourth expansion valve positioned on the refrigerant line between the heat-exchanger and the first expansion valve;
a fourth line having a first end connected to the fourth expansion valve, and a second end connected to the first line between the gas-liquid separator and the second expansion valve; and
a supply line connecting the gas-liquid separator and the compressor, the supply line being configured to supply the gaseous refrigerant from the gas-liquid separator to the compressor.