Refrigerator and defrosting control method thereof

Abstract

The invention provides a refrigerator and a defrosting control method thereof. The refrigerator comprises an evaporator, a first heater and a second heater, a first air return opening and a second air return opening are arranged beside the evaporator, the first air return opening is arranged close to the bottom of the evaporator, and the second air return opening is arranged above the first air return opening in a spaced manner. The first heater is arranged at the bottom of the evaporator, the second heater is arranged above the first heater, and the position of the second heater corresponds to the position of the second air return opening. The defrosting control method comprises the steps that the starting rate N of a second chamber in a set period is obtained, and then the defrosting mode is determined according to the starting rate N. According to the refrigerator and the defrosting control method, frequent defrosting can be avoided, the defrosting efficiency can be improved, the defrosting heating time can be shortened, energy consumption can be reduced, and the temperature in refrigerator chambers can be kept stable easily.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a refrigerator and a defrosting control method for the refrigerator. Background technique [0002] The evaporator is an important component of the refrigerator refrigeration system. With the continuous innovation of refrigerator product types, the structure of the evaporator needs to be adjusted accordingly. As far as air-cooled refrigerators are concerned, the evaporator is prone to frost during actual operation, and a heater is usually installed at the bottom of the evaporator. The power and specific structure of the heater will also be designed differently according to different products, but its The main function is to heat and defrost the evaporator. [0003] The return air outlets of existing air-cooled refrigerators are generally set at the bottom of the evaporator. During the refrigeration cycle, the return air flows upward from the bottom of the evaporat...

AI Technical Summary

Problems solved by technology

In addition, for open-door refrigerators, the evaporator is usually set in a "thin and tall" type, and the airflow channel is relatively narrow. Frequent defrosting will cause large temperature fluctuations inside the compartment, which is not conducive to energy saving; and defrosting heating The hot air generated can also easily enter the refrigerator through the refrigerator return air outlet, causing the temperature of the refrigerator to rise.

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