Photoelectric sensing hot gas bypass defrosting refrigerator and working method

Abstract

The invention relates to a photoelectric sensing hot gas bypass defrosting refrigerator and a working method. A photoelectric sensor, a revaporizer, a bypass pipeline and a corresponding control system are added; the photoelectric sensor is adopted to replace the traditional defrosting control system; the thickness of a frost layer is taken as the criterion of defrosting; the method of hot gas bypass is adopted for defrosting, which causes refrigerators to thoroughly defrost. The defrosting refrigerator of the invention has simple structure, high defrosting speed and small temperature fluctuation of the refrigerator. The invention has obvious advantages on the following aspects of keeping the quality of frozen and chilled matters, saving refrigerator operation cost, prolonging service lifeand being conveniently used and the like, thus being the development tendency of the indirect cooling refrigerators in future.

Description

technical field [0001] The invention relates to a refrigerator, in particular to a hot gas bypass defrosting refrigerator using a photoelectric sensor as a defrosting trigger condition. Background technique [0002] There are pressure difference-time, temperature difference-time and temperature-time control methods for defrosting defrosting of existing refrigerators. The outstanding problem is that none of the three control methods is based on the actual frost layer thickness of the refrigerator evaporator, so when defrosting, it often happens that the frost is not defrosted when it is necessary, and it is defrosted when it is not necessary. This increases the operating costs of the refrigerator and reduces its useful life. [0003] The current defrosting method of the refrigerator is electric heating defrosting, that is, the electric heating wire is attached to the surface of the evaporator. When defrosting is required, the unit stops cooling, and the electric heating wire...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem of incomplete defrosting and low defrosting efficiency of refrigerators at present, and proposes a photoelectric sensor hot gas bypass defrosting refrigerator and its working method. The thickness is used as the criterion for defrosting, so that the control of defrosting point is more reasonable, the defrosting is thorough, and the method of bypassing hot gas is used for defrosting, which has the characteristics of simple structure and fast defrosting speed

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