Device for alternately switching part of evaporator into condenser to defrost in due time

Abstract

The invention discloses a device for alternately switching a part of an evaporator into a condenser to defrost in due time. The device for alternately switching the part of the evaporator into the condenser to defrost in due time comprises a compressor, a gas-liquid segregator, a four-way reversing valve, a condenser, a liquid storing device, a filter, an expansion valve, a liquid separator, original evaporator bodies, standby evaporator bodies, defrosting sensors, three-way reversing valves and electromagnetic valves. The original evaporator bodies are in parallel connection with the standby evaporator bodies. The defrosting sensors are arranged on the original evaporator bodies and the standby evaporator bodies, the upper ends of the standby evaporator bodies are in series connection with the electromagnetic valves, and the two ends of each evaporator body are connected with the corresponding three-way reversing valves correspondingly, the upper ends of all the evaporator bodies are connected with the compressor, the gas-liquid segregator, the four-way reversing valve and the upper end of the condenser. The lower ends of all the evaporator bodies are connected with the liquid storing device, the filter, the expansion valve, liquid separator and the lower end of the condenser. According to the device for alternately switching the part of the evaporator into the condenser defrosting in due time, defrosting efficiency is high, it is not needed to absorb heat in a heat preservation water storing tank and air for defrosting, and energy consumption is low.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of defrosting equipment, and in particular relates to a defrosting device which alternately converts part of evaporators into condensers in good time. [0003] 【Background technique】 [0004] At present, there are many heat pump devices with defrosting function on the market. When the defrosting device needs to be defrosted, the system does not start the defrosting mode because the time has not arrived, but the evaporator has already formed a thick layer of ice, which affects evaporation. The heat absorber is low in efficiency; or, when defrosting is not needed or the frost has already melted, the system is still in defrosting mode, resulting in a waste of electric energy. When the four-way reversing valve reverse cycle system is defrosting, the whole system works in reverse, and it needs to absorb the heat in the heated water or air to defrost, which will cause the hot water temperature in the therm...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a device for timely converting part of evaporators into condensers for defrosting alternately, so as to solve the problems of untimely startup and shutdown of defrosting functions of existing defrosting devices, low defrosting efficiency, waste of electric energy, large temperature fluctuations, and equipment Problems such as short life and low practicability

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