What is the reason for the high low pressure value of the low temp chiller?

　　What is the reason for the high low pressure value of the low temp chiller?

　　In the application of industrial refrigeration, low-temperature coolers are used in conjunction with production and processing equipment, so their operation and operation time is relatively long. If customers lack professional maintenance and routine equipment maintenance for low-temperature coolers in their daily lives, as well as periodic replacement of consumables, and even ignore the power supply from installation to operation, the frequency of low-temperature cooler failures will be high, Therefore, we know some methods for troubleshooting and correcting low-temperature cooler faults, such as how to determine and analyze the possible causes if the low-pressure side pressure of the low-temperature cooler is high.

　　If the temperature of the medium chilled water on the cooling side that needs to be cooled is too high during the startup and operation of the low-temperature cooler, perhaps hot water above 40 ℃, then the low pressure value of the refrigerant in the low-temperature cooler will be very high. As the refrigeration of the low-temperature cooler continues to operate, the chilled water temperature will gradually decrease, and the low pressure value of the refrigerant in the low-temperature cooler will also gradually decrease; If the refrigerant filling amount of the low-temperature cooler is too high, it will result in a situation where the high-pressure and low-pressure values of the refrigerant in the low-temperature cooler are both too high.

　　If the capillary or expansion valve of the low-temperature cooler throttling device is damaged, resulting in refrigerant throttling and pressure reduction failure, the low pressure value of the refrigerant in the industrial low-temperature cooler will be higher; If there is no significant change in the high and low pressure values when the industrial low-temperature cooler is turned on and running, that is, there is no compression ratio, and the high and low pressure values when the industrial low-temperature cooler is shut down are similar, it is possible that the compression components inside the compressor are damaged, resulting in the refrigeration compressor being unable to compress.

　　The low pressure value of the refrigerant in the low-temperature cooler is relatively high, which may be due to the damage of the expansion valve or capillary of the low-temperature cooler throttling device, resulting in the failure of refrigerant throttling and pressure reduction;

　　It may be because when starting the low-temperature cooler, the temperature of the medium chilled water on the cooling side that needs to be cooled is too high, which may be hot water above 40 ℃. As the low-temperature cooler continues to operate, the chilled water temperature will gradually decrease, and the low pressure value of the refrigerant in the low-temperature cooler will also gradually decrease;

　　If there is no significant change in the high and low pressure values of the low-temperature cooler during startup and operation, that is, there is no compression ratio, and this state is similar to the high and low pressure values of the low-temperature cooler during shutdown, it is possible that the compression components inside the compressor are damaged, resulting in the refrigeration compressor being unable to perform compression work;

　　It may be that the refrigerant injection volume of the low-temperature cooler is too high, resulting in high low and high pressure values of the refrigerant in the low-temperature cooler.