In the refrigeration system, the refrigerant contains various foreign substances such as moisture, non-condensable gas, refrigeration oil, metal scraps, grease, fiber, dust, etc., and these foreign materials have a great influence on the constant humid heat test chamber refrigeration equipment. Therefore, everyone must know the problem of the constant damp heat test chamber caused by the presence of foreign matter and the elimination method.
First, the impact of moisture
The moisture in the system has a very bad influence on the constant damp heat test chamber. Generally, the water and the refrigerant interact with each other to corrode the metal, and at the same time, the lubricating oil is emulsified. At the low-pressure part of the small passage, sometimes the water can freeze the blocked passage, etc. There is moisture in the Freon system, which not only causes ice blockage, but also prevents the system from working properly.
Second, prevent moisture from entering protective measures
1. When air is used for airtight test, dry gas and non-combustible gas, such as carbon dioxide or nitrogen, should be used as much as possible;
2. Select a refrigerant that meets the standard;
3. Select a standard refrigeration oil;
4. There must be no leaks in the system, especially in the case of vacuum, to prevent air intrusion;
5. When disassembling the constant damp heat test chamber, it is best to keep the test chamber dry to prevent steam from entering the tank.
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