A solution spray type frost-free air source heat pump device

Abstract

The invention belongs to the field of heat pump technologies and refrigeration air conditioners, and relates to a solution spraying type frostless air source heat pump device. The device comprises a compressor, a four-way valve, an indoor heat exchanger, a first expansion valve, an outdoor heat exchange unit and a control unit. A heat exchanger in the outdoor heat exchange unit comprises a spraying type heat exchanger body, a second expansion valve and a finned heat exchanger body, and outdoor air firstly passes through the spraying type heat exchanger body and then passes through the finned heat exchanger body. In the heating process, refrigerating fluid from the first expansion valve flows through the spraying type heat exchanger body, the second expansion valve and the finned heat exchanger body in sequence and flows to an air suction opening of the compressor. In the refrigeration process, the refrigerating fluid discharged out of the compressor flows through the finned heat exchanger body, the second expansion valve and the spraying type heat exchanger body in sequence and then flows to the first expansion valve. Through the adjustment of the opening states of the first expansion valve and the second expansion valve, the heat pump device has the advantages that the outdoor heat exchange unit operates without frost in the heating process, the heating performance is stable, the regeneration power consumption is low, and the refrigeration operating performance in summer is improved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration technology and air source heat pump, and in particular relates to a frost-free air source heat pump system with spray dehumidification and regenerative heat recovery. Background technique [0002] Air source heat pumps have been widely promoted and applied in the middle and lower reaches of the Yangtze River, Southwest China and South China due to their advantages of both cooling and heating, compact structure, energy saving and water saving, and convenient installation. However, in areas with low temperature and high humidity in winter, air source heat pumps are prone to frost. Frosting will not only reduce the heat transfer area and increase the heat transfer resistance, but also increase the air flow resistance and reduce the air volume, resulting in insufficient heating capacity and increased heating energy consumption. Therefore, the development of air source heat pump technology that ...

AI Technical Summary

Problems solved by technology

This type of system better solves the problem of whether the frost-free air source heat pump can prevent frosting and the possible high energy consumption, but there are still the following deficiencies: ① Since the adsorbent material is sprayed on the surface of the air-cooled heat exchanger, its adsorbent The dosage is limited, which will undoubtedly shorten the frost-free running time, resulting in frequent regeneration process and affecting indoor comfort; ②Absorptive materials will lead to poor heat transfer performance of the heat exchanger, especially when operating in summer cooling mode, The adsorption material is even more detrimental to the heat exchanger

[0004] The above-mentioned frost-free air source heat pump system still has high energy consumption due to unreasonable design, cannot avoid frosting for a long time, and due to the use of outdoor low-temperature air for regeneration, the working condition is unstable or even re-frosting, or the system is too complicated, resulting in expensive investment and operation And other issues

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