Heat exchange gas-liquid separator with economizer function

Abstract

The invention discloses a heat exchange gas-liquid separator with an economizer function. A gas inlet pipe, a gas outlet pipe and a heat exchanger are arranged in a cylinder body. The heat exchanger is a sleeve type heat exchanger formed by an inner pipe and an outer pipe in an inner and outer sleeve stacked mode, the two ends of pipe ports of the inner pipe are separately a throttled refrigerantinlet and a gaseous refrigerant outlet, and the two ends of pipe ports of the outer pipe are separately a high pressure liquid refrigerant inlet and a high pressure liquid refrigerant outlet. After expanding and throttling, a branch of refrigerant liquid bypassed from a high pressure liquid refrigerant return circuit heat transfers with a high pressure liquid refrigerant of the outer pipe after entering the inner pipe, the high pressure liquid refrigerant entering the outer pipe further transfers heat with compressor absorbing gas entering gas fractionation from the gas inlet, refrigerated liquid after expansion and evaporation becomes gaseous, and returns to a compressor through the gaseous refrigerant outlet, so that the high pressure liquid refrigerant gets enough degree of supercooling, and the occurrence of absorbing gas with fluid is prevented by compressor absorbing gas overheating.

Description

technical field [0001] The invention relates to the field of refrigeration equipment, in particular to a heat exchange gas-liquid separator with an economizer function. Background technique [0002] The gas-liquid separator is an important equipment commonly used in the refrigeration system and is installed between the evaporator and the compressor. Under the operating condition of lower evaporation temperature, the refrigerant pressure and temperature in the gas-liquid separator are relatively low, the suction specific volume is large, and the system cycle efficiency is low. The heat exchange type gas-liquid separator is equipped with a heat exchange tube in the traditional gas-liquid separator. The high-temperature and high-pressure liquid refrigerant passes through the built-in heat exchange tube and the compressor in the gas separator for cold and heat exchange, and the high-pressure liquid refrigerant passes through Cold, superheating the suction air of the compressor;...

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Problems solved by technology

[0005] The relevant technologies disclosed in the above two invention patent application documents are all equipped with heat exchange tubes in the gas-liquid separator, so that the high-pressure refrigerant liquid can exchange heat with the compressor suction through the heat exchange tubes; however, due to the compressor suction Due to the limitation of the gas volume itself, this type of technical solution cannot provide sufficient subcooling for the high-pressure refrigerant

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