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Analyze and troubleshoot low-pressure water chiller

Release time: 2019-06-24 14:29:31

The industrial production and use of industrial chiller is very common. As a kind of mechanical equipment, the protection measures inside the machine are also very perfect. This not only protects the safe and stable operation of the host equipment, but also protects the safe operation and service life of the chiller.

Low-pressure failure of the screw chiller or air-cooled chiller means that the return pressure of the compressor is too low. To ensure that the compressor does not operate under no pressure or low pressure, the refrigeration system is equipped with a low return pressure protection device. Ensure that the refrigeration system is shut down in time when there is a leak in the refrigeration system to protect the refrigeration system from water and cause the whole machine to be scrapped.

Industrial chiller is a low pressure meter when the compressor is running. When the water temperature is 10 degrees high, the pump runs normally. When the pointer of the low pressure meter is lower than 3kg / cm, it can be determined that the low pressure is too low. Low pressure protection device The low pressure setting is usually 1kg / cm. The pressure at this time will not cause an alarm, but too low pressure will seriously affect the refrigeration efficiency and the service life of the compressor. Stop the machine and check for leaks in the refrigeration system. If there is leakage, repair welding and vacuum treatment before adding refrigerant.

When the chiller has a low-pressure alarm, the following situations are possible:

1. Refrigerant leakage. In order to ensure that the refrigeration system does not enter the water, you must immediately stop the machine and drain all the water in the water tank and pipes, and then seek professional treatment.

2. Report a low-pressure fault when the refrigeration system is leak-free. First check whether the pump is operating normally. If the pump stops or does not operate normally and the amount of heat exchange water is not enough, the low-temperature refrigeration return air temperature will also cause a low-pressure fault. If it is a pump The problem needs to be solved in a targeted manner. You can choose to repair the pump motor or replace the pump.

3. When the above two points are normal, the temperature controller or pressure controller may have a false alarm. First check whether the pressure controller is operating normally. If the pressure controller is not rusted during normal operation, the pressure inside the pressure controller is low. The alarm signal line is disconnected to detect whether the temperature controller is normal.

4. If the problem cannot be found in the routine inspection, please contact the manufacturer to solve it in time, so as not to delay the production progress too much.


Analysis and elimination of high pressure faults of chiller: PreviousNext : Steps to deal with fluorine leakage from chiller

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