Air source heat pump device and method of using solar hot water assisted defrosting

Abstract

The invention discloses an air source heat pump device with a solar hot water auxiliary defrosting function and a use method thereof. The device comprises a solar hot water system and an air source heat pump system, wherein the solar hot water system comprises a circulating water pump, a solar hot water drain pipe, a first cutoff valve, a solar heat collector, a heat storage water tank and a third cutoff valve, and the air source heat pump system comprises an evaporator, an expansion valve, a condenser, a four-way reversing valve and a compressor. The exterior of the original evaporator of the air source heat pump device is additionally provided with one row of heat exchange pipes, and hot water heated by solar energy flows in the heat exchange pipes. On one hand, the hot water is used for preheating the air, and on the other hand, a refrigerant pipeline is heated through the heat conduction of fins, so the evaporation temperature is raised to fundamentally avoid frosting. The air source heat pump device and the use method have the advantage that the evaporation temperature is raised to fundamentally avoid frosting; meanwhile, the efficiency and the working stability of the heat pump are improved, the electricity is saved, the environment-friendly and energy-saving effects are realized, and the like.

Description

technical field [0001] The invention provides an air source heat pump device with solar hot water assisted defrosting and its use method, which is a defrosting technology for evaporators, especially relates to the application of solar hot water defrosting technology in heat pumps, and belongs to air source heat pumps technology field. Background technique [0002] In the 21st century, energy shortages and increased awareness of environmental protection have brought new opportunities for the development of renewable energy. With the strong support of the international community and governments, the development and utilization of renewable energy has accelerated its promotion. Solar energy is an inexhaustible, safe, clean and non-polluting renewable energy. Using solar energy to provide low-grade energy is one of the important means to reduce building energy consumption and alleviate energy and environmental crises. In the early 1980s, the domestic air source heat pump chill...

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Problems solved by technology

[0003] The application of air source heat pump units is becoming more and more widespread. However, due to the low winter temperature in North China and the high air humidity in the Yangtze River Basin, the problem of frosting during the operation of the units cannot be avoided, which seriously affects the system efficiency.

In order to solve the above problems, water flushing frosting, electric heating, hot gas bypass and reverse cycle defrosting are generally used, and the evaporation temperature is increased by increasing the area of ​​the heat exchanger and increasing the air volume to delay the frosting time, but the effect is not good. obvious

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