A safety control system for defrosting hot refrigerant in cold storage

Abstract

The invention provides a safety control system for hot refrigerant defrosting of a refrigerator and belongs to the technical field of refrigeration. The system solves the problem of high accident probability due to a lack of an effective safety control system for existing refrigerator defrosting. The safety control system comprises a refrigerant compressor, an oil separator, a condenser, a liquid receiver, a vertical low-pressure circulation barrel, freezing equipment, as well as a pressure controller and a safety valve which are arranged on the freezing equipment, wherein a separator outlet of the oil separator is divided into two paths; one path forms a refrigerating circuit; a liquid supply electromagnetic valve is arranged between the liquid receiver and the vertical low-pressure circulation barrel; the other path forms a defrosting circuit; the pressure controller is used for detecting pressure in the freezing equipment and controlling opening and closing of a defrosting pressure regulation electromagnetic valve and the liquid supply electromagnetic valve according to detection results; and the safety valve is used for discharging an excessive refrigerant in the freezing equipment. The system is good in safety, and can effectively avoid accidents caused by the excessive liquid refrigerant during defrosting of the freezing equipment.

Description

technical field [0001] The invention relates to the field of refrigeration technology and safety technology, in particular to the defrosting safety technology of a freezing device of a refrigeration system, which can prevent safety accidents caused by pipeline overpressure due to misoperation of defrosting. Background technique [0002] After the freezing device of the refrigeration system runs for a period of time, a layer of frost will form on its outer surface. The existence of the frost layer will hinder heat exchange and reduce the heat transfer performance of the entire freezing device. In order to maintain the heat transfer performance of the freezing device, timely defrosting is necessary. [0003] Common defrosting methods for freezing devices include hot refrigerant defrosting, water defrosting and electric defrosting. Water defrosting has cumbersome operating procedures, low efficiency, and incomplete defrosting; electric defrosting consumes a lot of energy, and ...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the safety problems that are easy to occur when the hot refrigerant defrosts and the deficiencies in the application of the current defrosting technology, the present invention invents a safety control system for hot refrigerant defrosting in cold storage

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