Water chilling unit ejector performance simulation test system and test method

Abstract

The invention provides a water chilling unit ejector performance simulation test system and test method. The test system comprises an ejector to be detected, an ejection flow part, an ejected flow part and a control part. The jet flow part comprises a simulated condensation device, a first pressure sensor, a first electronic pressure regulating valve, a first filter, an electronic expansion valveand a first flow meter, and the jetted flow part comprises a simulated evaporation device, a self-selected working condition mode electromagnetic valve, a second filter, an electronic expansion valve,a second pressure sensor and a second flow meter; and the control part is used for receiving the numerical values sent by the first flow meter and the second flow meter and calculating the ejection coefficient of the ejector to be detected according to the collected gas flow and the second flow. By means of the system, the performance of the single ejector can be tested under different working condition pressures of the condenser and the evaporator, large fluctuation of the ejection performance of the ejector is eliminated, and the reliability of the oil return efficiency of the whole machineis guaranteed.

Description

technical field [0001] The invention relates to the field of performance testing of chiller components, and more particularly, to a chiller ejector performance simulation testing system and testing method. Background technique [0002] In the oil return system of the chiller, the ejector is widely used as a key component because of its simple structure and flexible installation. Commonly used ejectors are composed of inlet tubes, outlet tubes, and jet tubes. Most of the components are welded or threaded. At present, the assembly process mainly relies on visual inspection of the size of the components. In actual production, it is difficult to find subtle dimensional deviations in the internal channels. It is very easy to cause large fluctuations in ejector performance, resulting in insufficient oil return capacity when the whole machine is running under low pressure differential and other loads. In serious cases, the unit is frequently shut down for protection, and the ejecto...

AI Technical Summary

Problems solved by technology

Commonly used injectors are composed of inlet tubes, outlet tubes, and jet tubes. The components are mostly welded or threaded. At present, the assembly process mainly relies on visual inspection of the size of the components. In actual production, it is difficult to find subtle dimensional deviations in the internal channels. It is very easy to cause large fluctuations in ejector performance, resulting in insufficient oil return capacity when the whole machine is running under low pressure differential and other loads. In severe cases, the unit is frequently protected and shut down, and the ejector must be replaced repeatedly to solve the problem, resulting in waste of process production and after-sales costs

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