Frosting on the expansion valve
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Is frosting on the valve body and the pipeline downstream of the thermal expansion valve in the refrigeration compressor unit normal during its operation? Why? Should the capillary frost over? Solve
The insulation is not adequate. Frosting should not be visible.
Frosting is normal, but proper insulation should be ensured
I’m not discussing heat retention; I just want to know if frosting occurs under normal conditions
Why is there frost? Does liquid not frost up in the pipes, while gas does? Insulation is not taken into consideration
Frost formation is normal; it’s not a serious issue. Frost forms when there is a large temperature difference between the inside of the pipes and the outside temperature (i.e., low temperatures), combined with high humidity outside. It’s quite normal for frost to form when the cooling temperature is low due to expansion throttling. As for the capillary tube you mentioned, it depends on its function – if cold fluid flows through it, frost formation is also normal. So there’s no need to worry. If no frost forms after the expansion valve, it means that valve isn’t functioning properly, haha