Refrigerator and defrosting control method thereof

Abstract

The invention provides a refrigerator and a defrosting control method thereof. The method adjusts voltage applied to an electromagnetic defrosting device according to the surface temperature of an evaporator. When the surface temperature of the evaporator is increased by a certain temperature value at each time, the voltage applied to the electromagnetic defrosting device is reduced, so that the power of the electromagnetic defrosting device is reduced. In the defrosting control method, when the surface of the evaporator is thicker in accumulated frost and lower in temperature, the electromagnetic defrosting device is operated with high power, so that the defrosting efficiency is improved; and when the surface of the evaporator is few in accumulated frost and higher in temperature, the electromagnetic defrosting device is operated with low power, so that quicker surface temperature rise of the evaporator is prevented. The method determines the operation power of the electromagnetic defrosting device according to specific defrosting conditions of the evaporator, guarantees normal and stable surface temperature rise of the evaporator, improves the defrosting efficiency, and optimizesthe working process of the electromagnetic defrosting device.

Description

technical field [0001] The invention relates to a refrigerating and freezing device, in particular to a refrigerator and a defrosting control method thereof. Background technique [0002] After the air-cooled refrigerator has been in operation for a period of time, the evaporator will experience frost, which will affect its operating efficiency. Therefore, the refrigerator needs to defrost the evaporator after a period of cooling. [0003] A defrosting heating wire is provided near the evaporator inside the existing refrigerator, and after the heating wire is energized, the evaporator is heated by heat radiation to achieve the purpose of defrosting. However, in traditional electric heating defrosting, the temperature of the evaporator near the heating wire is higher and the defrosting speed is faster, while the defrosting speed is slower at the position farther from the heating wire, so it is easy to cause uneven defrosting of the evaporator as a whole. In addition, electri...

AI Technical Summary

Problems solved by technology

However, this method of setting the defrosting start point and end point based on experience has poor defrosting effect because the frosting / defrosting situation cannot be clearly defined.

Especially when it is determined that the defrosting is terminated, if the frosting on the evaporator is not completely eliminated and the defrosting is stopped, it will lead to insufficient defrosting, which will affect the subsequent cooling effect of the evaporator; if the frosting on the evaporator It has been completely eliminated, but the heating wire has not stopped heating, which will cause energy waste and affect the service life of the defrosting device

Images