Device and method for supplementing refrigerant to refrigeration system without pressurization equipment in winter

Abstract

The invention relates to the field of compressor refrigeration, in particular to a device for replenishing refrigerant to a refrigeration system without pressurized equipment in winter, including a centrifugal compressor, a propylene condenser is fixedly installed at the side end of the centrifugal compressor, and the propylene condenser A propylene storage tank is fixedly installed at one end, and one end of the propylene storage tank is fixedly connected to a propylene evaporator, and the end of the propylene evaporator away from the propylene storage tank is connected to the separator, and one end of the separator is fixedly connected to the centrifugal compressor. The other end is connected to the tube bundle device, and the propylene storage tank is fixedly connected to the side end of the tube bundle device, and the propylene transfer pump is fixedly installed on the side end of the propylene storage tank. In addition, the invention also relates to a method for replenishing refrigerant to a refrigeration system without pressurization equipment in winter. In the present invention, the centrifugal compressor, the separator, the propylene condenser, the propylene storage tank and the propylene evaporator are interconnected and used, and the work of replenishing the refrigerant to the inside of the system can be stably completed, which is convenient for use in a low-temperature environment.

Description

technical field [0001] The invention relates to the field of compressor refrigeration, in particular to a device and a method for supplementing refrigerant to a refrigeration system without pressurizing equipment in winter. Background technique [0002] The centrifugal compressor refrigeration system has the advantages of large refrigeration capacity, low energy consumption, and the refrigerant can be recycled. When stored or used in large quantities, it is a major source of danger. During the daily operation of the compressor, a certain amount of refrigerant will inevitably be consumed. Nitrogen will introduce the refrigerant into the storage tank, or replace the refrigeration system in part or as a whole during inspection and maintenance. When the unit starts up again, a large amount of nitrogen floods the device. In the early stage of the unit, it is necessary to continuously vent nitrogen to improve the purity of the refrigerant in the system and maintain the good operat...

AI Technical Summary

Problems solved by technology

If in the north with higher latitude in my country, the cold weather in winter often reaches -30°C or even lower. At this time, the saturated vapor pressure of the refrigerant is only 119.5Kpa for ammonia and 211.4Kpa for propylene; The outlet pressure of the compressor of the unit cannot replenish the refrigerant into the system, which brings risks and hidden dangers to the stable operation of the production device. In serious cases, it will cause a production accident in which the device is forced to stop due to the lack of refrigerant.

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