Electric heating defrosting method with aid of external air of refrigerator

Abstract

The invention discloses an electric heating defrosting method with the aid of external air of a refrigerator. A heat preservation box is arranged on the upper portion of a storage house of the refrigerator, and an inlet and an outlet of the heat preservation box are provided with a first electric air valve and a second electric air valve. Two air passages extending out of the storage house of the refrigerator are arranged at the top of the heat preservation box, and a third electric air valve and a fourth electric air valve are arranged in the two air passages. An evaporator is arranged in the heat preservation box, an electric heater is arranged in the evaporator, and an air circulation passage is arranged between the bottom of the evaporator and a bottom plate of the heat preservation box. An inlet of the evaporator is connected with a throttling device, and the outlet of the evaporator is connected with the air sucking port of a compressor. The inlet of a condenser is connected with the air exhausting port of the compressor, and the outlet of the condenser is connected with the throttling device. During electric heating defrosting, the external air of the refrigerator and opening and closing of the electric air valves assist in electric heating defrosting, so that the electric heating defrosting time is shortened, the operation energy consumption of a whole system is reduced, and it is guaranteed that the temperature in the refrigerator during defrosting is relatively stable.

Description

[0001] This invention application is a divisional application of the invention patent application "A device for assisted electric heating and defrosting using the outside air of a refrigerator and its operation mode". The application date of the parent application is March 19, 2014, and the application number is 2014101027764. technical field [0002] The invention belongs to the field of low temperature and cold storage, and more specifically relates to a device and its operating mode that use the outside air of the refrigerator to assist electric heating and defrosting. Frost. Background technique [0003] At present, the total capacity of cold storage in my country is increasing year by year, and the defrosting problem of cold storage has always been a hot topic in the field of low temperature and cold storage. In order to make agricultural and sideline foods have a better fresh-keeping effect, it is necessary to provide a "low temperature and high humidity" environment i...

AI Technical Summary

Problems solved by technology

[0004] As one of the defrosting methods of the refrigerator, the electric heating defrosting method is characterized by a simple structure, easy installation and control, but its disadvantage is that it consumes a lot of energy during the defrosting process

In addition, in the process of electric heating, a small part of the heat released by the electric heater is used for the defrosting of the evaporator, and most of the heat is dissipated into the refrigerator, which increases the cooling load of the refrigerator and affects the temperature fluctuation in the refrigerator. bigger

When the electric heating defrost is started, the temperature of the air around the evaporator will increase, and the refrigeration system will eliminate this part of the cooling load after defrosting, resulting in a great waste of energy

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