Automatic refrigerator defrosting system and control method

Abstract

The invention belongs to the technical field of refrigerators and particularly relates to an automatic refrigerator defrosting system and a control method. The automatic refrigerator defrosting system comprises a compressor, a refrigerating evaporator, defrosting heaters and a timer which are arranged in a refrigerator, the compressor is communicated with the refrigerating evaporator through a refrigerating pipeline, the defrosting heaters are distributed around the refrigerating evaporator and controlled by the timer, the refrigerating evaporator is a spiral tube evaporator wound outside a refrigerator liner positioned in a foaming layer, and a functional plate for defrosting water to flow into the top and flow out of a refrigerator body is arranged at the top of the refrigerator body. After the timer controls the compressor to be operated for a period of time accumulatively, the compressor is in the off state, the defrosting heaters start to heat for defrosting and then are turned off after defrosting is completed, a timing counter is reset, and the refrigerator is in normal operation. The automatic refrigerator defrosting system and the control method integrate advantages of direct-cooling refrigerators and air-cooling frostless refrigerators, so that the refrigerator is frostless or micro in frost and is capable of automatically treating the defrosting water.

Description

technical field [0001] The invention belongs to the technical field of refrigerators, and in particular relates to an automatic defrosting system and a control method for a refrigerator. Background technique [0002] In the prior art direct-cooling refrigerators, the freezing evaporator generally adopts a silk tube evaporator. After the refrigerator has been in operation for a period of time, a thick layer of frost will freeze on the surface of the evaporator. Since the system cannot automatically defrost, the frost layer frozen on the surface of the evaporator will More and more, affect the heat transfer efficiency of the evaporator. For this type of refrigerator, the user can only shut down the refrigerator after using it for a period of time, and let the refrigerator melt the frost on the surface of the evaporator through the ambient temperature. The disadvantage is that it cannot automatically defrost and deal with defrosting water, which is not very convenient for user...

AI Technical Summary

Problems solved by technology

[0002] In the prior art direct-cooling refrigerators, the freezing evaporator generally uses a silk tube evaporator. After the refrigerator has been running for a period of time, a thick frost layer will freeze on the surface of the evaporator. Since the system cannot automatically defrost, the frost layer frozen on the surface of the evaporator will More and more, affecting the heat transfer efficiency of the evaporator

For this type of refrigerator, the user can only shut down the refrigerator after using it for a period of time, and let the refrigerator melt the frost on the surface of the evaporator through the ambient temperature. The disadvantage is that it cannot automatically defrost and deal with defrosting water, which is not very convenient for users to use

Its advantages are: automatic defrosting and automatic treatment of defrosting water, realized through the frost-free air duct system; disadvantages: the matching of air duct system and refrigeration system is complicated, and food is easy to dry

However, the evaporating area of ​​the evaporator in this patent is too small to meet the cooling needs of the freezer.

After adding evaporators on both sides and bottom of the inner tank, the defrosting water on both sides and bottom cannot be automatically processed

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