In the above, the above explains that the moisture in the refrigeration system has a very bad influence on the constant damp heat test chamber. So what other foreign objects must attract our attention?
Third, the impact of non-condensing gas
The non-condensable gas in the refrigeration system is mostly generated by air intrusion and gas decomposed by oil at high temperature. Due to the presence of non-condensable gas in the system, the condensing pressure is increased, the exhaust gas temperature is increased, and the refrigeration is reduced. The ability to increase the power consumption, especially when using ammonia as the refrigerant, often causes an explosion due to the presence of non-condensable gas, so always pay attention to the venting of the non-condensable gas in the system. Air is generally released through an air separator. When there is no such equipment, after the compressor of the constant damp heat test chamber is stopped, the condenser is supplied with water, the ammonia gas in the condenser is condensed into a liquid, and the non-condensed gas is collected above the constant damp heat test chamber, and the vent valve can be passed through. Let go.
Fourth, measures to prevent non-condensed gases from entering the system
1. Before charging the refrigerant, the system should reach a high vacuum;
2. After the constant damp heat test chamber is disassembled and installed, vacuuming should be carried out;
3. The system is strictly resistant to leakage.
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