MULTI-FUNCTIONAL HEAT EXCHANGER OF SUPERCRITICAL REFRIGERATING CYCLE SYSTEM

摘要

A multi-functional heat exchanger of a supercritical refrigerating cycle system is provided to form a refrigerant inlet and a refrigerant outlet at an upper part of an accumulator body to arrange a pipe easily, improve the efficiency of heat exchange in the accumulator body to improve the efficiency of a system, and simplify a structure and reduce an installation area to reduce time required for assembling a vehicle. An accumulator(34) is connected with a refrigerant exit of a header of a gas cooler(36), close to the header. A low-pressure side refrigerant inlet part(44) is formed at an upper part of a hollow tank(42) to introduce a low-pressure refrigerant coming out from an evaporator into the tank. A low-pressure side refrigerant outlet pipe(46) is installed in the tank in a vertical direction to discharge gaseous refrigerant separated from the refrigerant introduced into the tank. A high-pressure side refrigerant inlet pipe(48) is installed surrounding one side of an outer peripheral surface of the low-pressure side refrigerant outlet pipe in a length direction to exchange heat with the low-pressure refrigerant. A high-pressure refrigerant outlet pipe(50) is installed surrounding the other side of the outer peripheral surface of the low-pressure side refrigerant outlet pipe in a length direction to exchange heat with the low-pressure refrigerant, connected with a lower end of the high-pressure side refrigerant inlet pipe. The low-pressure side refrigerant outlet pipe is a double pipe having an inner pipe part and an outer pipe part.