Method and device for icing protection for evaporator of refrigerator, and refrigerator

Abstract

The embodiment of the invention provides a method and a device for icing protection for an evaporator of a refrigerator, and the refrigerator, and relates to the field of refrigerators. Whether the evaporator is iced or not can be judged according to the change of a temperature in the refrigerator to judge whether the refrigerator enters an evaporator defrosting running mode or not, so that the accuracy of defrosting running judgement for the evaporator of the refrigerator is improved. The method comprises the following steps: acquiring the maximum temperature difference in a first preset time length of refrigeration running of the refrigerator after the refrigeration of the refrigerator is started; judging whether a door-opening action exists in the first preset time length of the refrigeration running of the refrigerator or not; when the door-opening action does not exist in the first preset time length of the refrigeration running of the refrigerator, judging whether the maximum temperature difference is greater than or equal to a temperature difference threshold value or not; or else, determining that the evaporator is iced, and controlling the refrigerator to enter the evaporator defrosting running mode. The embodiment of the invention is applied to the field of refrigerators.

Description

technical field [0001] The invention relates to the field of refrigerators, in particular to a refrigerator evaporator freezing protection method, device and refrigerator. Background technique [0002] As an inaccessible electrical appliance in modern life, the refrigerator is mainly responsible for preventing food from spoiling and spoiling. The refrigeration function in the refrigerator is an indispensable part to realize this function, but the refrigeration process takes a long time and often causes The evaporator in the refrigerator freezes, which greatly reduces the cooling effect, so the existing refrigerators will have an evaporator defrosting operation mode to deal with the evaporator freezing, so as to detect and correct the evaporator in time when the refrigerator evaporator freezes. Perform defrosting. However, the traditional defrosting program of the refrigerator is not intelligent enough. It mainly enters the defrosting process based on the cumulative running ...

AI Technical Summary

Problems solved by technology

[0002] As an inaccessible electrical appliance in modern life, the refrigerator is mainly responsible for preventing food from spoiling and spoiling. The refrigeration function in the refrigerator is an indispensable part to realize this function, but the refrigeration process takes a long time and often causes The evaporator in the refrigerator freezes, which greatly reduces the cooling effect, so the existing refrigerators will have an evaporator defrosting operation mode to deal with the evaporator freezing, so as to detect and correct the evaporator in time when the refrigerator evaporator freezes. Defrost

However, the traditional defrosting program of the refrigerator is not intelligent enough. It mainly enters the defrosting process based on the cumulative running time of the compressor and the cumulative door opening time. The phenomenon of icing occurs; but the problem that only takes the accumulated time as the judgment condition of the evaporator defrosting is that the accumulated running time of the compressor, the accumulated door opening time and the evaporator icing have a certain relationship, but not absolute

The compressor runs for a long time and the door is opened for a long time. The evaporator does not necessarily freeze seriously. The compressor runs for a short time and the door is opened for a short time. It does not guarantee that the evaporator does not freeze.

Therefore, the current defrosting judgment method of the evaporator has certain risks and waste. At the same time, to ensure normal cooling, the defrosting interval will take a relatively small value. In many cases, it can be defrosted after a period of refrigeration. In some cases There may even be no need for defrosting at all

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