A method for defrosting a refrigerator

Abstract

The invention provides a refrigerator defrosting method which comprises the following steps: judging whether an evaporator needs defrosting; if yes, starting all heater strips to heat all the heater strips for defrosting; detecting the defrosting temperature; utilizing a plurality of pressure difference detecting devices to detect pressure differences of a plurality of different heights so as to obtain a plurality of first pressure difference values; according to each of the first pressure difference values, turning off part of or all heater strips, and / or reducing voltage applied to each of the heater strips in part of or all heater strips; and / or turning off all heater strips according to the defrosting temperature. With adoption of the defrosting method, the heat release amounts of the heater strips at different positions can be properly reduced to enable the evaporator of the refrigerator to defrost as needed, so that the power consumption is reduced, the defrosting duration is shortened and the preservation effect can 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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