Refrigerator and defrosting control method thereof

Abstract

According to the refrigerator and the defrosting control method thereof, the correlation between evaporator surface frosting and first input voltage of a first draught fan is utilized, and the corresponding relation between the evaporator frosting amount and the first input voltage of the draught fan can be established at the specific rotating speed. When the first draught fan actually operates, the stable operation voltage of the first draught fan is detected, the frost amount of the evaporator is indirectly judged, and defrosting is started at proper time. According to the method, the frosting degree of the evaporator can be accurately recognized, the defrosting heating pipe is started at the optimal moment to defrost the evaporator, energy waste caused by premature defrosting is avoided, deterioration of the refrigerating performance of the refrigerator caused by untimely defrosting is also avoided, and defrosting according to needs is achieved in the actual using process.

Description

technical field [0001] The invention relates to the technical field of refrigerator control, in particular to a refrigerator and a defrosting control method thereof. Background technique [0002] The energy consumption of defrosting accounts for 10% to 20% of the energy consumption of air-cooled refrigerators. Optimizing the defrosting control of refrigerators can significantly improve the energy efficiency index of the whole machine. At present, the defrosting judgment condition commonly used in refrigerator products is to use the accumulated running time of the whole machine or the compressor, which is also called the variable frost cycle control method. Namely: set a minimum defrosting time tmi n and a longest defrosting time tmax. In more detail, according to experience, set the defrosting intervals of different ambient temperature / humidity, setting gear, and door opening and closing time. When the defrosting time set by the program is reached, start the defrosting heat...

AI Technical Summary

Problems solved by technology

[0003] This method of defrosting with time as the control parameter cannot accurately capture the actual amount of frost on the surface of the evaporator under different working conditions, and there are problems such as premature defrosting and untimely defrosting

For example, in the actual use of the user, putting in food with high water content or opening and closing the door frequently will accelerate the frosting of the evaporator. When the user does not put food in or open the door for a long time, there will be less frost on the evaporator, and the heat transfer performance will not decline significantly when the defrosting time interval meets the program setting, and the defrosting will occur prematurely. Lead to increased energy consumption of refrigerators, frequent defrosting temperature rises affect food quality and other issues

Images