Throttle control mechanism of cross-critical carbon dioxide refrigerating system

Abstract

The throttle control mechanism of cross-critical CO2 refrigerating system includes mainly throttle valve, vapor-liquid separator, solenoid valve, mixer thermal expanding valve, etc. The opening of the thermal expanding valve is controlled the overheat degree of refrigerant in the outlet of the evaporator, and through the regulation of the opening and thus the evaporation pressure, the overheat degree of refrigerant is controlled. The control of pressure in the high pressure side is completed via the solenoid valve to control the inlet state of the refrigerant into the expanding valve. The present invention uses universal elements and thus is economic and reliable. Using the mechanism can control the evaporation pressure effectively, raise the heat transferring efficiency of the evaporator and control the pressure in the high-pressure side.

Description

Technical field: [0001] The invention relates to a throttling control mechanism of a refrigeration system, in particular to a throttling control mechanism of a transcritical carbon dioxide refrigeration system, which is used to control the pressure of the high-pressure side and the low-pressure side of the transcritical carbon dioxide refrigeration system, and belongs to the technical field of refrigeration. Background technique: [0002] At present, human beings are facing more and more serious environmental problems, among which the ozone layer depletion and the greenhouse effect are increasingly concerned by the whole world, and the replacement of refrigerants is imminent. The CFC refrigerants used in the past destroyed the ozone layer. Although the commonly used HFC refrigerants do not destroy the ozone layer, the greenhouse effect is obvious. Although people can work hard to synthesize better refrigerants, due to the inevitable discharge of refrigerants, the final resul...

AI Technical Summary

Problems solved by technology

Although this solution solves the problem of simultaneous control of the high and low pressure sides to a certain extent, it is not applicable to the carbon dioxide refrigeration system using a fixed capacity compressor

Moreover, the cost of the frequency conversion compressor is much higher than that of the fixed capacity compressor, so the economy of the aforementioned scheme is poor

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