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随着我国工业的不断发展,用氟利昂作制冷剂的冷藏库越来愈多。由于对这种制冷系统缺乏认识,在试运行过程中,经常出现冰塞现象。即制冷剂通过膨胀阀节流时,温度骤降(-10℃以下),制冷系统中的水份凝结成冰,膨胀阀通道变小,节流后的压力降低;压力越低,蒸发温度也就越低,直至膨胀阀通道完全堵塞,造成制冷系统不能正常运行。冷藏库制冷系统中出现冰塞现象,主要是因为制冷系统中混进了水份。这部分水份
With the continuous development of our country’s industry, there are more and more refrigerators with Freon refrigerants. Due to the lack of understanding of this type of refrigeration system, ice jams often occur during the test run. That is, when the refrigerant throttles through the expansion valve, the temperature drops abruptly (below -10°C), the water in the refrigeration system condenses into ice, the expansion valve channel becomes smaller, and the pressure after throttling decreases; the lower the pressure, the lower the evaporation temperature. The lower the pressure, until the expansion valve channel is completely blocked, causing the cooling system to not function properly. The phenomenon of ice jam in the refrigeration system of refrigerators is mainly due to the incorporation of water in the refrigeration system. This part of the water