Frost-free air source heat pump system based on humidity control and evaporative cooling

Abstract

The invention discloses a frost-free air source heat pump system based on humidity control and evaporative cooling, which includes a refrigerant circuit, a water and humidity control solution circuit and an air circuit. The refrigerant circuit includes a compressor, a four-way valve, a first heat exchanger, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, a heat exchanger, a liquid receiver, a drying Filter, electronic expansion valve, finned tube heat exchanger, gas-liquid separator; water and humidity control solution circuit includes humidifier, first valve, second valve, third valve, fourth valve, first solution pump , a second solution pump, a fluid storage, a heat exchanger and a regeneration device; the air circuit includes a finned tube heat exchanger, a humidifier and a fan. The system of the present invention can avoid frosting during heating operation in winter, and lower condensation temperature and higher cooling efficiency through evaporative cooling during cooling operation in summer, thereby realizing efficient operation of the system in both winter and summer.

Description

technical field [0001] The invention belongs to the technical field of design and manufacture of refrigeration and air-conditioning systems, and relates to a frost-free air-source heat pump system based on humidity control and evaporative cooling. Background technique [0002] Air source heat pumps take into account both refrigeration and heating, and have the advantages of high comprehensive utilization efficiency of primary energy, energy saving, environmental protection, and low initial investment. The vigorous promotion of air source heat pumps is of great significance to improve the comprehensive utilization efficiency of energy in my country and realize energy saving and emission reduction. The biggest problem in the heating operation of air source heat pumps in winter is the frost on the surface of the outdoor fin tube heat exchanger. With the growth of the frost layer between the fins of the heat exchanger, the heat transfer resistance between the fin surface and the...

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Problems solved by technology

[0004] Technical problem: The purpose of the present invention is to solve the performance degradation of the air source heat pump system caused by the frosting problem and the low cooling efficiency in summer, and to provide a solution to adjust the humidity in winter to achieve heating operation without frosting. A frost-free air source heat pump system based on humidity control and evaporative cooling to achieve lower condensing temperature operation and improve subcooling by evaporative cooling

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