An expansion valve performance test system and a refrigeration valve performance test system

Abstract

An expansion valve performance testing system, comprising: a compressor, a condenser, a subcooler, a second flow regulating valve, and an evaporator connected in sequence by pipelines, the outlet of the evaporator is connected to the inlet of the compressor; and the second flow regulating valve A test main circuit with valves connected in parallel; the first branch and the second branch set on the test main road and branched from the test main road, the second branch is provided with the assembly section of the expansion valve under test; it is used to test the expansion valve under test The second temperature sensor for the temperature in front of the valve is set on the test main road or the first branch road. The present invention ensures that when the opening of the expansion valve to be measured is very small and the flow rate of the branch where it is located is extremely small, there is still sufficient The flow passes through the first branch circuit and the test main circuit, and the temperature in front of the valve can be measured by the second temperature sensor set on the first branch circuit or the test main circuit, which is also easy to control, solves the problems of the prior art, and improves the test performance. accuracy.

Description

technical field [0001] The invention relates to a performance testing system for an expansion valve and a performance testing system for refrigeration valve parts. Background technique [0002] In the existing technology, when testing the nominal capacity of the expansion valve, when the opening of the expansion valve is small, the temperature in front of the valve is difficult to measure and control due to the extremely small flow in the passage, which reduces the accuracy of the test; secondly, it is necessary to Use another system to test the internal leakage of the expansion valve, the test efficiency is low, and the current leakage test bench usually uses compressed air or nitrogen and other gases in the leakage test, which cannot simulate the actual working conditions of the valve; Third, the test system consumes a lot of energy, and the working conditions are stable slowly, which is not conducive to energy conservation and environmental protection; fourth, usually onl...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, when testing the nominal capacity of the expansion valve, when the opening of the expansion valve is small, the temperature in front of the valve is difficult to measure and control due to the extremely small flow in the passage, which reduces the accuracy of the test; secondly, it is necessary to Use another system to test the internal leakage of the expansion valve, the test efficiency is low, and the current leakage test bench usually uses compressed air or nitrogen and other gases in the leakage test, which cannot simulate the actual working conditions of the valve; Third, the test system consumes a lot of energy, and the working conditions are stable and slow, which is not conducive to energy conservation and environmental protection; fourth, usually only a single refrigeration valve such as an expansion valve can be tested, and other valves cannot be tested

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