A solution defrosting heat pump unit for freezing regeneration

Abstract

The invention discloses a solution defrosting type heat pump unit for freezing regeneration, which comprises a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, a gas-liquid separator, a solution collecting plate located at the lower part of the outdoor heat exchanger, The solution regeneration heat exchanger, solution pump, heat exchanger sprayer, fan, first throttling assembly and second throttling assembly arranged in the solution collection tray; when the outdoor heat exchanger is frosted in winter, the spraying system is turned on , the sprayed concentrated solution effectively removes the frost layer on the surface of the outdoor heat exchanger to ensure the efficient operation of the unit; when the solution is regenerating, the cooling capacity of the refrigerant on the evaporating side is fully utilized to freeze the water in the solution into ice, and then the cooling capacity of the refrigerant on the condensing side is used to freeze the water in the solution. De-icing is carried out by cooling and heating, and the solution is regenerated after the ice cubes are removed. The invention effectively solves the problem of difficult regeneration of the defrosting solution, avoids the energy loss of the defrosting of the conventional heat pump unit and the damage to the compressor caused by the frequent reversing of the four-way reversing valve, improves the heating performance of the unit, and realizes the defrosting of the unit. continuous and efficient operation.

Description

technical field [0001] The invention belongs to the technical field of heat pump air conditioners, in particular to a freezing regeneration solution defrosting heat pump unit. Background technique [0002] The study found that only when the two conditions that the surface temperature of the fin tube is lower than the solidification temperature of condensed water and the surface temperature of the fin is lower than the dew point temperature corresponding to the outdoor air can the fin surface of the outdoor heat exchanger of the air source heat pump be possible. frost. [0003] Based on the above frosting mechanism, Yan Ling proposed a new frost-free air source heat pump system (Yan Ling, Research on the Variation Law of Spray Solution Characteristics of Frost-free Air Source Heat Pump System, Harbin Institute of Technology, 2011). The outdoor unit of the heat pump is coupled with a solution spray system. When the frost on the outdoor heat exchanger reaches a certain level,...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a solution defrosting type heat pump unit for freezing and regeneration, so as to solve the problems in the prior art that the solution is difficult to regenerate and the solution tank is too large, and realize the continuous high efficiency of the unit throughout the year under the condition of ensuring winter defrosting operation, improving the economy and reliability of air source heat pump units

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