The reason why the high and low temperature test machine is frosted and the low pressure cylinder has a wet stroke is usually due to improper operation of the evaporation system or the low voltage equipment, and the symptoms and treatment methods are the same as the single stage. The occurrence of defrosting in the high pressure cylinder is often caused by the liquid level of the intercooler being too high, and the signs are the same as the single stage. What are the treatment methods? Let's learn together with Xiaobian!
1. First, close the suction valve of the small high and low temperature test machine compressor and unload it to the minimum number of cylinders.
2. Close the liquid supply valve of the intercooler and close the suction valve of the small high pressure cylinder.
3. After the high pressure cylinder returns to normal, open the suction valve of the large and low pressure cylinders, resume normal operation, and supply liquid to the intercooler.
4. If the high pressure cylinder is seriously frosted, the unit should be stopped.
5. Discharge the intercooler.
6. Cooling water treatment is the same as single-stage treatment.
Second, the prevention of frost:
In the high and low temperature test machine compressor, there is always a sign of frosting. For example, the gloss of the paint on the side surface of the suction chamber suddenly disappears and condensation forms to frost. The suction and exhaust temperatures of the compressor drop sharply, the body is cool, the sound of operation is heavy, and the sound of the valve is not clear. After discovering this phenomenon, corresponding measures should be taken to adjust the refrigeration conditions of the high and low temperature test chamber system in time. deal with.
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