Method for defrosting based on by-pass circulating defrosting structure of refrigerator

Abstract

The invention discloses a by-pass circulating defrosting structure of a refrigerator, which comprises a defrosting electric heater, an evaporator and a centrifugal fan arranged in a cold and hot air source chamber, and is provided with a by-pass air duct for defrosting circulation, wherein a cold wall clapboard is arranged between the by-pass air duct and the cold and hot air source chamber, and the by-pass air duct consists of the cold wall clapboard and a by-pass air duct insulation board; the cold wall clapboard is provided with a cold wall clapboard air outlet and a cold wall clapboard return air inlet; the by-pass air duct insulation board is provided with an air outlet electric air valve, a return air inlet electric air valve; a by-pass air duct inner electric air valve is arranged in the by-pass air duct; and the centrifugal fan is communicated with the cold wall clapboard air outlet through an air pipe. Simultaneously, the invention also discloses a control unit based on the by-pass circulating defrosting structure of the refrigerator and a defrosting control method thereof. Because the defrosting process is limited in a closed space and a frost layer is heated by the combined action of heat conduction and convection, the by-pass circulating defrosting structure of the refrigerator, the control unit and the method have the advantages of short defrosting time, high defrosting efficiency, stable storehouse temperature during defrosting and the like.

Description

technical field [0001] The invention relates to a refrigeration and low-temperature refrigeration system, in particular to a defrosting method based on a bypass cycle defrosting structure of a refrigerator Background technique [0002] The research on defrosting of cold storage system has always been a hot topic in the field of cryogenic storage technology. Most of the agricultural and sideline products need to be stored in a "low temperature and high humidity" environment, and this environment makes the evaporator in the refrigeration system operate under the conditions that are easy to frost, and the consequence is that with the operation time of the system Growth, the frost layer on the surface of the evaporator continues to accumulate and gradually thicken, which seriously affects the heat transfer effect of the evaporator. The change of the working state point of the fan increases the energy consumption of the fan. Therefore, timely and effective defrosting of the eva...

AI Technical Summary

Problems solved by technology

According to the principle of Arrhenius chemical reaction kinetics, the increase of storage temperature will accelerate the rate of various biochemical reactions inside the stored items, shorten the storage period of items, and even lead to the deterioration of stored items; The hazard is to cause condensation on the surface of stored items, which creates conditions for the survival and reproduction of microorganisms, which will seriously affect the quality and shelf life of stored items

In addition, after the evaporator is defrosted, in order to eliminate the defrosting waste heat lost by the defrosting electric heater into the cold storage, it is necessary to increase the running time of the cold storage refrigeration system

Images