What are the effects of insufficient refrigerant or excessive filling of the vending cabinet?

1. Failure phenomenon and treatment method of excessive refrigerant filling in unmanned vending machine 1. Failure phenomenon: The refrigeration effect of the whole unmanned vending machine is poor, and the pressure on the high pressure side and low pressure side is found to be too high when checked with a manifold pressure gauge. (When the compressor speed is about 2000r/min and the ambient temperature is 35℃, the pressure of the high-pressure gauge is about 19kg/cm2, the pressure of the low-pressure gauge is 2.3kg/cm2, and no bubbles can be seen in the sight glass. 2. Faults Reason: The refrigeration system is filled with too much refrigerant, so that the refrigeration capacity cannot be fully exerted, resulting in poor refrigeration effect. 3. Treatment method: connect the manifold pressure gauge to the refrigeration system of the unmanned vending machine, and slowly loosen the manifold The manual valve on the low pressure side of the pressure gauge allows the refrigerant to be discharged slowly (cannot be discharged from the high pressure side, because the refrigerant from the high pressure side will bring out a large amount of refrigerating oil) until the pressure on the high and low sides is normal, and the refrigeration can be seen from the sight glass The refrigerant flows clearly, and there are occasional bubbles flowing through. 2. The symptoms and reasons of insufficient refrigerant in unmanned vending machines 1. Failure phenomenon: the whole machine of unmanned vending machines has poor refrigeration effect, and the air at the outlet is a bit cooler. Manifold pressure gauge inspection found that both the high pressure side and low pressure side pressure are low (when the compressor speed is 2000r/min and the ambient temperature is about 35℃, the low pressure meter index is lower than 1kg/cm2, and the high pressure meter index is lower than 10kg/cm2) At the same time, the flow of bubbles can be seen from the sight glass. 2. The cause of the failure: The refrigeration system of the unmanned vending machine has refrigerant leakage points, which leads to insufficient refrigerant. 3. Treatment methods: (1) Use an electronic leak detector to detect the leakage Click and repair or replace the parts. (2) If the parts are not replaced, only an appropriate amount of refrigerant can be added; if the parts are replaced, an appropriate amount of refrigerating oil should be added as required, and the system should be evacuated to add sufficient refrigerant. As described above Insufficient refrigeration or too much refrigerant will affect the vending container, and how to deal with it, I hope it will be helpful to everyone. I will talk about it this time, and see you next time. Previous: What is the prospect of the vending container in the hotel What about next: Can vending cabinets only sell drinks?