supermarket refrigerated showcase » article > display freezer > Commercial refrigeration's one point, two listening, three watching, four touches, five releases and six tests (3)
Commercial refrigeration's one point, two listening, three watching, four touches, five releases and six tests (3)
commercial refrigeration's one point, two listening, three watching, four touches, five releases, six tests,
, tests for compressor exhaust and system tightness. Objective To test the compressor discharge performance, the airtightness of the refrigeration pipeline, and the smoothness of the refrigeration pipeline. When the compressor is initially diagnosed as non-venting or poorly exhausted, after opening the compressor process pipe port to vent, weld the compressor exhaust pipe port, plug in the commercial refrigeration power supply to make the compressor run, and press the compressor row with your thumb If the air pipe port is easily blocked, it proves that the compressor is not exhausted or has poor exhaust. Preliminary diagnosis of leakage in the refrigeration system, and when the amount of refrigeration discharged from the compressor process pipe port is small, the total pressure does not leak, and 80% of the leakage points are in the high-pressure pipes, such as condensers, anti-dew pipes, compressors and connection welds : The total pressure leakage and leakage points are mostly in low-pressure pipelines or anti-dew pipes: the high-pressure leakage and leakage points must be in the high-pressure pipelines, and the anti-dew pipe is the most likely: low-pressure leakage and the leakage points must be in the evaporator And connecting pipelines. Preliminarily diagnose the blockage of the refrigeration system, first open the capillary tube to vent, then open the compressor process tube port and blow in nitrogen from it. Which tube port of the capillary tube has no gas discharge or discharge is small and uneven, then judge the pipeline on the side of the nozzle Blocking.
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