Solar coupled air source heat pump system

Abstract

The invention discloses a solar coupled air source heat pump system. The system mainly comprises a solar heat collector, an air preheater, an evaporator, a compressor, a condenser, an expansion valve, an electric heating auxiliary water storage tank, a thermal insulation material, hot water for a user, return water, a circulating water pump and an electromagnetic valve, wherein the upper end is connected with the air preheater and the lower end is connected with the circulating water pump after the solar heat collector is connected in series with the electromagnetic valve and then connected in parallel with the electromagnetic valve; after the electric heating auxiliary water storage tank is connected in parallel with the electromagnetic valve, the upper end is connected with the air preheater, and the lower end is connected with the electromagnetic valve; the electromagnetic valve is connected with the circulating water pump; the thermal insulation material is coated on the outer side of the air preheater; the evaporator is arranged on the right side of the air preheater; the upper end of the evaporator is connected with the compressor, and the lower end of the evaporator is connected with the expansion valve; the left upper end and the left lower end of the condenser are connected with the compressor and the expansion valve respectively; the return water is connected with the circulating water pump; the circulating water pump is connected with the right lower end of the condenser; the hot water for the user is led out from the right upper end of the condenser. The system has the complementary advantages of solar energy and air heat energy, and the heating reliability of the system is improved.

Description

technical field [0001] The invention relates to the technical field of air source heat pumps, in particular to a solar energy coupled air source heat pump system. Background technique [0002] Air source heat pump water heater is a kind of energy-saving equipment that scientifically utilizes electric energy. The air heat source of the air source heat pump is everywhere, the most convenient and widely used, especially the direct heating air source heat pump water heater, which directly heats the supplementary cold water to the set temperature and continuously sends it into the water storage tank without putting the water storage tank The water is repeatedly circulated and heated, so hot water can be obtained within a few minutes after starting up, and the temperature of the water storage tank can be kept stable, giving full play to the volumetric efficiency of the water storage tank, which is generally welcomed by users. However, in the humid weather in winter when the tempe...

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Problems solved by technology

However, in the humid weather where the temperature is close to zero in winter, the air source heat pump is prone to frost during operation, and the frost layer hinders the heat transfer of the evaporator, which rapidly reduces the heat pump efficiency and hinders the popularization and application of air source heat pump products in cold northern regions.

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