Refrigerator and defrosting method thereof

Abstract

The invention relates to a refrigerator and a defrosting method thereof. Specifically, the refrigerator comprises a refrigerator body, an evaporator and a semiconductor refrigeration assembly provided with a cold end and a hot end, wherein at least one storage chamber is defined in the refrigerator body. The evaporator is arranged to exchange heat with air flowing through the evaporator so as to provide cooling airflow for the storage chambers. At least a part of the cold end of the semiconductor refrigeration assembly is in hot connection with one or more storage chambers to deliver cold flow of the cold end to the storage chambers, and the hot end of the semiconductor refrigeration assembly is in hot connection with the evaporator to deliver hot flow of the hot end to the evaporator. The invention further provides the defrosting method of the refrigerator. The defrosting method comprises the steps that a defrosting signal is generated according to the working condition parameters of the refrigerator; the semiconductor refrigeration assembly is started to enable the cold end and the hot end to separately generate the cold flow and the hot flow; and the cold flow of the cold end is delivered to one or more storage chambers to restrain the temperature fluctuation of the storage chambers, and the hot flow of the hot end is delivered to the evaporator to conduct defrosting operation on the evaporator.

Description

technical field [0001] The invention relates to freezing and refrigeration technology, in particular to a refrigerator and a defrosting method thereof. Background technique [0002] After existing refrigerators (especially air-cooled refrigerators) have been in operation for a period of time, frost will form on the evaporator. When the amount of frosting reaches a certain level, it is necessary to stop the compressor of the refrigerator to defrost the evaporator. Current refrigerators mainly use electric heating wires to heat and defrost the evaporator. Due to the influence of two factors, the shutdown of the compressor and the heating of the electric heating wires, the temperature in the storage room of the refrigerator will fluctuate. And, when the compressor is activated again to cool the storage compartment of the refrigerator, the workload required becomes large. It can be seen that using the heating wire to defrost the evaporator in the prior art will not only increa...

AI Technical Summary

Problems solved by technology

However, the cold storage box occupies the effective storage space of the refrigerator, and the cold storage agent in the cold storage box still needs the cooling capacity provided by the compressor to cool down and store cold after the evaporator defrosts, so the total energy consumption of the refrigerator has not been reduced.

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