Defrosting processing method and defrosting control device for refrigerator

Abstract

The invention provides a defrosting processing method and defrosting control device for a refrigerator. The refrigerator comprises a compressor and an evaporator. The defrosting processing method for the refrigerator comprises the steps of detecting the operation time of the compressor, the inlet temperature of the evaporator and the door opening and closing state of the refrigerator; according to the operation time of the compressor, the inlet temperature of the evaporator and the door opening and closing state of the refrigerator, determining whether defrosting processing is needed or not. According to the technical scheme, estimation precision of the amount of frosting on the surface of the evaporator is improved, reasonability of the defrosting process is improved, the problem that the amount of frosting on the surface of the evaporator is large due to the fact that the defrosting process is started earlier or later is avoided, and the using effect of the refrigerator is ensured.

Description

technical field [0001] The invention relates to the technical field of refrigerators, in particular to a defrosting treatment method for a refrigerator and a defrosting treatment device for a refrigerator. Background technique [0002] At present, the air-cooled frost-free refrigerator has gradually become the mainstream product in the refrigerator industry. The air-cooled frost-free refrigerator is not really frost-free, but the moisture in the air is condensed to the surface of the finned evaporator through the flow of air, that is, the surface of the evaporator. layer of frost. When the frost layer on the surface of the evaporator is less, it can promote the heat transfer of the evaporator, but as the amount of frost on the surface of the evaporator increases, the heat transfer resistance of the evaporator increases, and at the same time, the pressure drop loss of the return air flowing through the surface of the evaporator increases. The air supply volume of the system ...

AI Technical Summary

Problems solved by technology

When the frost layer on the surface of the evaporator is less, it can promote the heat transfer of the evaporator, but as the amount of frost on the surface of the evaporator increases, the heat transfer resistance of the evaporator increases, and at the same time, the pressure drop loss of the return air flowing through the surface of the evaporator increases. The air supply volume of the system is significantly reduced, which eventually leads to a significant decrease in the heat transfer effect of the evaporator, so the air-cooled frost-free refrigerator needs to be defrosted at intervals

Since the evaporator is located behind the air duct cover, it is impossible to directly observe the amount of frost on its surface, and it is impossible to directly judge the most reasonable entry point of the defrosting process based on the thickness of the frost layer on the surface of the evaporator

[0003] Most of the existing air-cooled frost-free refrigerators use the cumulative operating time of the compressor as the basis for judging the entry point of defrosting, and only use the running time to judge the amount of frost on the surface of the evaporator. However, due to the strong dynamics of the refrigerator during actual use, For example, the ambient temperature and humidity of the refrigerator and the internal heat load of the refrigerator make the correlation between the accumulative operating time of the compressor and the growth process of the frost layer on the surface of the evaporator poor, so that the former cannot reflect the amount of frost on the surface of the evaporator well, and the occurrence of The phenomenon that the defrosting process starts earlier or later affects the use of the refrigerator

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