Air-supplying enthalpy-adding heat pump air conditioning system capable of promoting heat exchange performance of heat exchangers

Abstract

The invention discloses an air-supplying enthalpy-adding heat pump air conditioning system capable of promoting the heat exchange performance of heat exchangers. The air-supplying enthalpy-adding heat pump air conditioning system capable of promoting the heat exchange performance of the heat exchangers comprises an air-supplying enthalpy-adding compressor, a four-way valve, an outdoor side heat exchanger, an indoor side heat exchanger, an air-liquid separator and a double-direction spiral flash vessel, an air outlet pipe is arranged on the side wall of a barrel of the upper section of the double-direction spiral flash vessel, and a first refrigerant inlet and outlet pipe and a second refrigerant inlet and outlet pipe which extend to an inner cavity of the barrel are arranged on the side wall of the barrel at the lower end; the air outlet pipe is connected with a first magnetic valve and an air-supplying opening of the air-supplying enthalpy-adding compressor in sequence and simultaneously connected with a second magnetic valve and the air-liquid separator in sequence, the first refrigerant inlet and outlet pipe is connected with a first expansion valve and the outdoor side heat exchange in sequence, and the second refrigerant inlet and outlet pipe is connected with a second expansion valve and the indoor side heat exchange in sequence. According to the air-supplying enthalpy-adding heat pump air conditioning system capable of promoting the heat exchange performance of the heat exchangers, not only can heating air-supplying be achieved, but also high-temperature refrigeration air-supplying can be achieved, on the normal temperature refrigeration working condition that air-supplying is not needed, the flash vessel serves as the air-liquid separator, the air phase ratio of refrigerant at an inlet of each heat exchanger is reduced, and the heat exchange performance of the heat exchangers is promoted.

Description

technical field [0001] The invention relates to an air-conditioning system for increasing enthalpy by supplementing air, in particular to a heat pump air-conditioning system for increasing enthalpy by supplementing air, which can improve the uniformity of refrigerant distribution and the heat exchange efficiency of heat exchangers when the air is not supplemented. Background technique [0002] Existing heat pump air-conditioning systems operate in low-temperature environments, and there are still problems such as attenuation of heating capacity, reduced heating efficiency, and unreliable system operation due to elevated compressor exhaust temperatures, which limits the popularization and use of heat pump air conditioners in cold northern regions. Due to its good low-temperature adaptability, the air-supplementing and enthalpy-increasing heat pump air-conditioning system has been gradually applied to low-temperature household air conditioners, automobile air conditioners and o...

AI Technical Summary

Problems solved by technology

When cooling, the flash evaporator is bypassed, and the refrigerant directly enters the evaporator for evaporation and heat exchange after throttling. However, due to the uneven distribution of refrigerant at the inlet of the micro-channel heat exchanger and the existence of gaseous refrigerant, the heat transfer efficiency of the heat exchanger is reduced , the performance of the air conditioning system degrades

[0005] Moreover, increasing enthalpy by replenishing air can not only improve the low-temperature heating performance of the heat pump air-conditioning system, but also improve the high-temperature cooling performance of the air-conditioning system. It involves the switching of cooling / heating modes. At this time, to ensure the one-way flow of the flash evaporator, at least four additional solenoid valves are required for control, which increases the complexity of the system.

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