Heat pump system for vehicle

Abstract

A heat pump system for a vehicle includes: an air conditioning device that circulates a refrigerant through a refrigerant line; a coolant circulation device that circulates a coolant through the coolant line; a first refrigerator connected to the coolant circulation device through a coolant line, connected to the refrigerant line through a first refrigerant connection line, and heat-exchanging the selectively inflowing coolant with the refrigerant supplied from the air conditioning device to control the temperature of the coolant; and a second refrigerator connected to the coolant circulation device through a coolant line, connected to the second refrigerant connection line such that the refrigerant is supplied from the air conditioning device, and raising the temperature of the refrigerant by heat exchange between the coolant and the refrigerant such that waste heat is recovered from the coolant selectively flowing therein, the air conditioning apparatus includes a gas injection portion that diverts a portion of the refrigerant passing through the condenser to the compressor to increase a flow rate of the refrigerant circulating in the refrigerant line.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2020-0123944 filed with the Korean Intellectual Property Office on September 24, 2020, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to a heat pump system for a vehicle, and more particularly, to a heat pump system for a vehicle that can control the temperature of a battery module through a refrigerator that performs heat exchange using a refrigerant and a coolant, and by Increase heating efficiency with another chiller that recovers waste heat from electrical components. Background technique [0004] Generally, an air conditioning system for a vehicle includes an air conditioning device for circulating a refrigerant to heat or cool a vehicle interior. [0005] The air conditioner can maintain comfortable indoor conditions by keeping the indoor temperature of t...

AI Technical Summary

Problems solved by technology

[0012] Therefore, the size and weight of the cooling module provided at the front of the vehicle increase, and the layout of connecting pipes in the engine room for supplying refrigerant or coolant to the heat pump system, cooling components, and battery cooling system becomes complicated.

[0013] In addition, the battery cooling system that heats or cools the battery according to the state of the vehicle is separately provided so that the battery can operate in an optimal state, so multiple valves connecting the battery cooling system and each connecting pipe are applied, so noise and vibration will be reduced is transmitted to the interior of the vehicle, reducing ride comfort

[0014] In addition, when heating the interior of the vehicle, the heating performance decreases due to lack of heat sources, the power consumption increases due to the use of electric heaters, and the power consumption of the compressor increases

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