Refrigerant supply unit for refrigerator heat exchanger performance test system

Abstract

The invention relates to a refrigerant supply unit for an experimental system for testing the performance of a refrigerator heat exchanger, in particular to a refrigerant supply unit for an experimental test system for measuring the heat transfer heat and heat transfer coefficient of a refrigerator evaporator and a condenser. Refrigerant supply unit for refrigerator heat exchanger performance test system, including compressor, condenser inlet temperature control system, auxiliary condenser, condensing liquid flow meter, condensing pressure control system, liquid receiver, subcooler, evaporator liquid supply flow Meter, throttle group, auxiliary evaporator, evaporating pressure regulating valve, temperature sensor, pressure sensor, switching valve and other auxiliary equipment. The unit has the advantages of good controllability of operating parameters, high test accuracy, and the ability to simulate the actual operating environment of the evaporator and condenser under the operating conditions of the refrigerator.

Description

technical field [0001] The invention relates to a refrigerant supply unit for an experimental system for testing the performance of a refrigerator heat exchanger, in particular to a refrigerant supply unit for an experimental test system for measuring the heat transfer heat and heat transfer coefficient of a refrigerator evaporator and condenser, It belongs to the technical field of refrigeration. Background technique [0002] The evaporator and condenser are two important heat exchangers in the refrigeration system of the refrigerator, and their performance directly affects the performance of the entire system of the refrigerator. Although the whole machine experiment can directly investigate the performance of the whole refrigerator system including the evaporator and condenser, the whole machine experiment needs to make a prototype, the experiment cycle is long, and the whole machine experiment cannot exclude the influence of other factors and directly reflect the heat tr...

AI Technical Summary

Problems solved by technology

However, the heat transfer of the refrigerator evaporator and condenser is very small, and the test of the heat transfer has high requirements on the accuracy of the test system, and it is difficult to accurately measure the performance of the refrigerator heat exchanger

[0003] After literature search, it was found that Yue Jiannan et al. described an evaporator / condenser in the article "Refrigerator Heat Exchanger Performance Test Bench Measurement and Control System Development" published in "Industrial Control Computer" 1 (2013): 32-33. An experimental test system for testing the heat transfer performance of refrigerator evaporators and condensers consisting of two heat exchanger environmental simulation rooms, a refrigerant supply unit and a set of measurement and control system. The experimental system uses the refrigerant enthalpy difference method to measure The heat transfer capacity and heat transfer coefficient of the refrigerator heat exchanger, however, due to the system structure, sensor type and operation control method adopted by the refrigerant supply unit in the experimental system, the controllability of the test boundary conditions of the test heat exchanger is determined Poor, low test accuracy, unable to accurately reflect the performance parameters of the evaporator and condenser under the typical operating conditions of the refrigerator

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