Defrost control method and device for air-cooled refrigerator

Abstract

The invention provides a defrosting control method and device of an air-cooled refrigerator. The defrosting control method of the air-cooled refrigerator comprises the following steps: detecting an air pressure difference of air supply flow of the air-cooled refrigerator before and after the air supply flow passes through an evaporator of the air-cooled refrigerator; judging whether the air pressure difference of the air supply flow is greater than a preset first air pressure difference threshold value; if the air pressure difference of the air supply flow is greater than the preset first air pressure difference threshold value, triggering the air-cooled refrigerator to start a defrosting procedure; and if the air pressure difference of the air supply flow is not greater than the preset first air pressure difference threshold value, judging whether the operation rate of a compressor of the air-cooled refrigerator is greater than a preset operation rate threshold value, and if the operation rate of the compressor is greater than the preset operation rate threshold value, judging whether the frosting thickness of the evaporator reaches a level where defrosting is needed. Therefore, defrosting can be carried out according to the actual frosting condition of the evaporator, and the refrigerator cold loss caused by frequent defrosting and the reduction of the heat exchange efficiency due to untimely defrosting are avoided.

Description

technical field [0001] The invention relates to refrigerator control, in particular to a defrosting control method and device for an air-cooled refrigerator. Background technique [0002] 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. The cooling speed of the air-cooled refrigerator is faster. Especially for large-capacity refrigerators, it is more convenient to use. Air-cooled refrigerators are mainly used in large-capacity products above 280L. Due to the relatively uniform temperature inside the refrigerator compartment, precise temperature control, and good fresh-keeping effect, it has gradually become the focus of refrigerator development. [0003] However, when the circulating air flow of the existing air-cooled refrige...

AI Technical Summary

Problems solved by technology

The defrosting time of the above control method is relatively long, the power consumption of the process is large, the control accuracy is poor, and it is impossible to know the frosting situation and defrosting situation of the cooler

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