Leakage detection method for refrigeration system

Abstract

The invention relates to a detection method for a refrigeration system, in particular to a leakage detection method for a refrigeration system. The leakage detection method comprises the following steps that: the refrigeration system is vacuumized; vacuum pressure maintaining is carried out on the vacuumized refrigerating system, and if the pressure of the refrigerating system which has been subjected to vacuum pressure maintaining is qualified, the refrigerating system is filled with a detection nitrogen-hydrogen mixed gas; the pressure of the refrigerating system which has been filled with the mixed gas is detected, if the pressure is not lower than detection pressure, suction gun leakage detection is performed; a suction gun is adopted to perform air suction leakage detection on leakagepoints which are susceptible to leakage, if the leakage points are qualified, a pressure maintaining test is carried out; if the pressure of the refrigeration system which has been subjected to the pressure maintaining test is lower than pressure maintaining pressure, the refrigeration system is not qualified, and the method returns to a suction gun leakage detection process for re-detecting theleakage points; the nitrogen-hydrogen mixed gas in the refrigeration system which is qualified after pressure maintaining is discharged, and secondary vacuumizing is performed on the refrigeration system; and the refrigeration system is injected with nitrogen. The leakage detection method for the refrigeration system has the advantages of simplicity, practicability, low detection cost, high safety, high leakage point detection precision, fast leakage point detection, accurate and reliable detection results and high detection efficiency, and is suitable for the leakage detection of various refrigeration systems.

Description

technical field [0001] The invention relates to a detection method of a refrigeration system, in particular to a leak detection method of a refrigeration system. Background technique [0002] With the development of social economy, the refrigeration industry is also booming. Refrigeration systems are widely used in various industries. At the same time, the country's requirements for environmental protection are getting higher and higher. Europe, the United States and my country are also gradually tightening the allowable leakage rates for the refrigeration industry. It is imperative to improve the leak detection process. [0003] Leakage of refrigeration system is a common fault in the production and operation of refrigeration equipment. Once it occurs, it will not only affect the normal use of the equipment, but also cause damage to the compressor. [0004] Leakage of the refrigeration system refers to the failure of the air tightness of the system, which causes the ref...

AI Technical Summary

Problems solved by technology

[0022] The influence of human factors is relatively large;

[0023] Unable to detect leaks less than 1.0E-3mbarl / s.

[0024] If the workpiece gets wet, it may damage the product or need to be dried;

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