A high-efficiency solution defrosting air source heat pump water heater unit

Abstract

The invention discloses an efficient solution defrosting air source heat pump water heater unit. The efficient solution defrosting air source heat pump water heater unit comprises a compressor, a condenser, a high-pressure liquid storage device, a drying filter and a gas-liquid separator, wherein the compressor is used for sucking in a gaseous refrigerant and conducting compression output; the condenser is connected with an exhaust port of the compressor; an inlet of the high-pressure liquid storage device is connected with an outlet of the condenser; an inlet of the drying filter is connected with an outlet of the high-pressure liquid storage device; and an outlet of the gas-liquid separator is connected with a gas suction port of the compressor. The efficient solution defrosting air source heat pump water heater unit further comprises an electromagnetic valve, a throttling mechanism, an ejector, a solution regeneration heat exchanger and an outdoor heat exchanger. The throttled low-temperature and low-pressure refrigerant conducts freezing and regeneration on a dilute solution after defrosting, then through the ejector driven by high-pressure liquid, the evaporation pressure level of the outdoor heat exchanger is achieved through ejection and pressure boosting, the freezing regeneration efficiency of the solution and the heating performance of the heat pump unit are effectively improved, the freezing regeneration efficiency of the dilute solution is effectively improved, and meanwhile, efficient heating operation of a heat pump system in the regeneration stage is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of air source heat pumps, in particular to a high-efficiency solution defrosting air source heat pump water heater unit. Background technique [0002] In the middle and lower reaches of the Yangtze River in my country and similar climate regions, the outdoor air temperature and humidity parameters in winter are often in the frosting area of ​​the air source heat pump. In this area, the air source heat pump is used for heating operation in winter. When the air dew point temperature is lower than the freezing point temperature of water, frost will appear on the surface of the outdoor heat exchanger. When the surface of the outdoor heat exchanger of the unit is frosted, the heat transfer resistance of the outdoor heat exchanger will increase, the area of ​​the air circulation channel will decrease, and the ventilation volume of the outdoor heat exchanger will decrease, which will eventually lead to a decrease in...

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Problems solved by technology

Although this method can greatly reduce the volume of the system, due to the relatively low condensation temperature of the heat pump system, it is difficult to reach the regeneration temperature of the solution, and the heat obtained by the supercooling of the refrigerant is small, and it is difficult to meet the heat required for the regeneration of the solution.

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