The problem of icing of the compressor casing of the constant temperature and humidity test chamber is actually not a technical problem. The main point is the maintenance and maintenance problem. For equipment, quality is one aspect, and maintenance plays a decisive role in the life of the constant temperature and humidity chamber.
1. After the process tube of the constant temperature and humidity test chamber is opened, it is not sealed or repaired in time. Long-term shelving of frost and frequent start-up, the moisture in the air will be brought into the machine from the outside of the nozzle; there is also a compressor that has not been sealed for a long time, and it will be replaced by frost when it is not dried, and it will cause icing.
2. After the refrigeration evaporator is damaged, the water molecules in the frozen (storage) room will be brought into the compressor together with the water vapor in the air (the negative pressure will be generated in the evaporator when the machine is turned on, and the atmospheric pressure will be wet). Water molecules in the air are brought into the machine). It also causes icing.
3. Constant temperature and humidity test chamber If the evaporator is poorly ventilated, the cold belt will not cause the evaporator to frost or freeze, resulting in low pressure and low pressure, which will also cause frost on the compressor casing.
4. Under normal working conditions of the constant temperature and humidity test chamber, the compressor sucks back the refrigerant vapor instead of the liquid. If the refrigerant is too much in the refrigeration system and the refrigerating oil is excessively charged or the expansion valve regulates the flow rate too much, The refrigerant is not completely evaporated in the evaporator, so that the refrigerant is sucked back by the compressor in a wet vapor or liquid state, and the charging causes ice formation.
5. The constant temperature and humidity test chamber compressor compresses the water vapor in the air into water when it is pressurized, and injects into the pipeline, thus causing ice formation.
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