Causes Of Frost Formation On The Expansion Valve Of A Water Chiller

The reason for frost formation on the contraction valve of the water chiller is: the contraction valve is blocked (this condition is relatively rare and usually occurs on older machines. Due to the dry filter in front of the contraction valve, the phenomenon of blockage of the contraction valve is relatively rare); The cooling medium of the water chiller is not sufficient (this phenomenon is relatively common, the cooling effect of ordinary new units is not good, and the phenomenon of frost formation on the contraction valve may occur); This is the design of the system itself; The system temperature was once low enough.
When the system problems of industrial water chillers are low, the contraction valve, the compressor, and so on will frost. Normal temperature water chillers typically operate at temperatures ranging from 5 to 30 degrees Celsius. Due to the fact that normal temperature water chillers typically use water as a heat transfer medium, water will freeze when it reaches 0 degrees Celsius, which can affect its activity and possibly lead to evaporator cracking and other phenomena.
Also, the compressor I choose to use for normal temperature water chillers is also normal temperature. The minimum temperature for this type of compressor is - 15 degrees Celsius. When the evaporator reaches around 0 degrees Celsius, the return end of the compressor is basically below zero degrees Celsius, so we don't mind if the temperature for water chillers is too low.