Thermal management system of gas injection type for vehicle

A thermal management system of gas injection type for a vehicle, the system comprising:

• a main refrigerant line in which a compressor, an inner condenser, a first expansion valve, an air condenser, a second expansion valve, and an evaporator are provided to circulate a refrigerant;
• an integrated heat exchanger that is provided between the inner condenser and the air condenser on the main refrigerant line, and allows heat exchange between a portion of refrigerant discharged from the compressor or the inner condenser and refrigerant which is an expanded version of the remaining refrigerant;
• a gas injection refrigerant line branched from a rear end of the compressor or the inner condenser, and in which branched refrigerant passes through a third expansion valve and then is bypassed to the compressor through the integrated heat exchanger;
• and
• a controller that controls whether the compressor operates or not, and, by adjusting opening degrees of the first expansion valve, the second expansion valve, and the third expansion valve, controls whether the refrigerant flows or not and whether the refrigerant expands or not,
• wherein between the compressor and the inner condenser, a first branch line is provided in which the refrigerant discharged from the compressor joins, after bypassing the inner condenser, the refrigerant that has passed through the inner condenser,
• the gas injection refrigerant line is branched from the rear end of a point where the first branch line joins the main refrigerant line,
• a second branch line, in which the refrigerant expanded in the third expansion valve joins the refrigerant that has bypassed the third expansion valve, is provided at the rear end of the third expansion valve of the gas injection refrigerant line, and
• the integrated heat exchanger is provided with a third branch line that allows a gaseous refrigerant to be joined at a front end of the compressor of the gas injection refrigerant line.