Air source heat pump unit capable of realizing continuous heat supply

Abstract

The invention relates to an air source heat pump unit capable of realizing continuous heat supply. The air source heat pump unit comprises a compressor unit, an indoor water heat exchange unit, a quasi-second-stage compression unit, an outdoor air heat exchange unit and a defrosting branch unit. According to the air source heat pump unit disclosed by the invention, the new technical scheme of quasi-second-stage compression, water-side double-stage heat exchange, and multi-branch heat taking and alternating defrosting, of an air source heat pump under the working condition of low environment temperature is adopted, firstly, a compressor is additionally provided with an air supplementing port, and a middle plate heat exchanger is additionally arranged in a system, so as to form heat pump circulation with the quasi-second-stage compression; secondly, double-stage heat exchange is adopted for the indoor water heat exchange unit, and two stages of heat exchangers are arranged, so as to furthest increase the temperature of circulating water, and the temperatures of supply and return water; and finally, an outdoor air heat exchanger of the air source heat pump is configured to be at leasttwo branched heat taking and defrosting systems capable of independently running, and defrosting operation is carried out on a fluorine-air heat exchange mechanism in each branch in an alternating manner one by one, so that alternating accurate defrosting and continuous heat supply are realized.

Description

technical field [0001] The invention relates to an air source heat pump unit, in particular to an air source heat pump unit for continuous heat supply. Background technique [0002] The air source heat pump is an energy-saving device that uses high-level energy to make heat flow from low-level heat source air to high-level heat source. It is a form of heat pump. The air source heat pump has a wide range of applications, can run all year round, does not need special personnel to guard, has low operating costs, and has outstanding energy-saving effects. It is an environmentally friendly product. It does not emit pollutants during operation, and at the same time, it will not cause damage to the human body, and has good social benefits. Therefore, it is widely used in heating and cooling in cold winter and hot summer areas in my country. [0003] However, in the cold northern region (Huaihe River), as the outdoor temperature decreases, the application of air source heat pumps h...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the heating capacity and energy efficiency of existing air source heat pumps are greatly reduced at low temperatures, and continuous heating cannot be realized under defrosting conditions. Continuous heating under frost conditions, and can maximize the temperature difference between the circulating water and the supply and return water, thereby improving the delivery efficiency of circulating water

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