Defrosting method for refrigerator

Abstract

The invention provides a defrosting method for a refrigerator. The refrigerator comprises an evaporator and a plurality of heating wires; each heating wire extends in the horizontal direction; the multiple heating wires are arranged at intervals in the height direction of the evaporator; each heating wire is configured to directly or indirectly heat the evaporator; and the multiple heating wires comprise first heating wire bodies. The defrosting method comprises the steps that when the evaporator needs to be defrosted, the same voltage is applied to each heating wire so that each heating wire is heated to conduct defrosting; the defrosting temperature is detected, and the voltage applied to the first heating wire bodies is lowered according to the defrosting temperature; and all the heating wires are turned off when the defrosting temperature reaches a first preset temperature value. According to the frosting quantities and the defrosting temperatures of different positions of the evaporator, the heat releasing quantities of the heating wires in different positions can be appropriately reduced so that the evaporator of the refrigerator can be defrosted according to requirements, it is very important to defrost the different positions of the evaporator according to requirements, power consumption can be reduced, the defrosting time length can be shortened, and the fresh-keeping effect can also be enhanced.

Description

technical field [0001] The invention relates to the field of refrigerated and frozen storage, in particular to a method for defrosting a refrigerator. Background technique [0002] A refrigerator is a refrigeration device that maintains a constant low temperature, and it is also a civilian product that keeps food or other items in a constant low temperature and cold state. Air-cooled technology uses a built-in hidden cooler (such as the evaporator of the refrigerant circulation system) to cool the air flowing through it, and the fan forces the cold air to circulate, so that the cold air is evenly distributed in each compartment of the refrigerator to achieve cooling. When the air in the refrigerator passes through the surface of the evaporator, the moisture in the air will condense on the surface of the evaporator. Because the temperature of the evaporator is too low, a frost layer will form after a period of time, resulting in a decrease in the heat transfer efficiency of t...

AI Technical Summary

Problems solved by technology

In the process of defrosting the evaporator, the bottom of the evaporator is heated first, so the frost at the bottom of the evaporator starts to melt first, and then the frost in the middle and upper parts of the evaporator gradually melts, so the time for the bottom of the evaporator to be heated by the heater It is relatively long, and it is very easy to cause aging and damage to the plastic parts at the bottom of the evaporator due to long heating time

The frost on the evaporator absorbs a lot of heat in the process of gradually melting into water from bottom to top, and the melting time is relatively long, resulting in a serious waste of heat

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