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LOSS OF REFRIGERANT CHARGE AND EXPANSION VALVE MALFUNCTION DETECTION
LOSS OF REFRIGERANT CHARGE AND EXPANSION VALVE MALFUNCTION DETECTION
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机译:制冷剂充注和膨胀阀故障的检测
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摘要
An actual superheat value in a refrigerant system is compared to an expected superheat level. If the actual superheat valve exceeds a certain predetermined value, this is an indication of refrigerant charge loss or a malfunctioning expansion device. In one example, the superheat valve is determined by comparing a difference between a saturated vapor temperature and an actual operating vapor temperature. The superheat determination can be made either at evaporator exit, economizer heat exchange exit or near the compressor discharge port.
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