Method for determining charging quantity of freezing and cold storage equipment refrigerating fluid

Abstract

The invention discloses a method for determining charging quantity of freezing and cold storage equipment refrigerating fluid. The method includes the following three steps that (1), the charging quantity of the refrigerating fluid is estimated; (2), refrigerating fluid charging and performance testing are conducted by selecting at least four working conditions from a high temperature to a low temperature in accordance with the estimated value of the step (1) according to environment features of regions where it is hot in summer and cold in winter, the refrigerating fluid of different mass is charged into a test unit, and refrigerating capacity, the energy efficiency ratio, input power and the like of the test unit are tested through an enthalpy potential method; (3), test results of the selected working conditions are compared and analyzed, and finally the best charging quantity range of the refrigerating fluid used when the freezing and cold storage equipment operates all the year round is obtained. The charging quantity of the freezing and cold storage equipment refrigerating fluid can be accurately determined through estimation of the refrigerating fluid charging quantity, tests and comparison and analysis, performance of the unit is improved, the method is more accurate compared with a traditional method for simply estimating the charging quantity of the refrigerating fluid, and the unit performance is better.

Description

technical field [0001] The invention belongs to the technical field of building environment and equipment engineering, and relates to a method for determining the charging amount of refrigerant. Background technique [0002] Compression condensing units are widely used in the refrigeration and refrigeration industry, and the matching terminal devices are even more diverse. Due to the different matching units, this type of unit does not specify the refrigerant charge when it leaves the factory, but according to the refrigeration side unit. According to the style and installation situation, the installer usually estimates the refrigerant charge amount by observing the state of the refrigerant in the sight glass based on experience, and evaluates the pros and cons of the entire system based on the cooling capacity, energy efficiency ratio, input power, etc. of the system. As an evaluation standard, it will bring problems such as insufficient refrigerant charge or excessive char...

AI Technical Summary

Problems solved by technology

[0007] Technical problem: The present invention provides a method that can solve the problem of inaccurate refrigerant charge of refrigeration equipment based on air-cooled air-cooled compression condensing units, whi

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