Refrigerator defrosting controlling system and control method thereof

Abstract

The invention designs a refrigerator defrosting controlling system. A defrosting temperature sensor is arranged on an evaporator, a water tray is arranged below the evaporator, a defrosting heating tube which is connected with a high-temperature fuse in series is connected with a controller, and the defrosting heating tube is arranged between the evaporator and the defrosting tray. The invention also comprises a defrosting control method for the refrigerator defrosting controlling system. During a refrigerator running period, the temperature variation rate of a refrigerator freezing chamber is monitored to judge the frost layer condition of the evaporator by combining with compressor running time, and then the defrosting process starts; when the refrigerator defrosts, a control plate controls the defrosting heating tube to heat for certain time, and then works in the mode of cycling heating; after the frost layer of the evaporator melts, the frost layer can be separated from the evaporator by the gravity to fall into the water tray and the defrosting process is stopped until the temperature of evaporator is at about 6 DEG C. In order to exhaust defrosting water, the compressor, the fan and the like are started after delaying for a certain time after defrosting.

Description

technical field [0001] The invention relates to the field of refrigerator manufacturing, in particular to a refrigerator defrosting control system. The invention also relates to a refrigerator defrosting control method of the refrigerator defrosting control system. technical background [0002] After the refrigerator has been in operation for a period of time, a layer of frost will form on the surface of the evaporator, which will affect the heat exchange between the evaporator and the air in the frost and reduce the cooling efficiency. Therefore, the refrigerator must be defrosted after it has been in operation for a period of time. The defrosting device of a general refrigerator includes an evaporator, a defrosting heating pipe, a water tray heating pipe, a defrosting temperature sensor, a high temperature fuse, and a refrigerator controller. The defrosting process of a general refrigerator is that after the refrigerator has been working for a certain period of time, the ...

AI Technical Summary

Problems solved by technology

During this period, because the judgment method of entering the defrosting state is too mechanical, and there is also a water tray heater, the heating tube has a large power, and at the same time, the long-term defrosting will cause the temperature inside the refrigerator to rise too much, resulting in increased energy consumption of the refrigerator. The ice cream in the refrigerator melted and the food spoiled

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