External water vapor absorption device for refrigerating system

The utility model is applicable to the technical field of refrigeration system cooling, and provides an external water vapor absorption device for a refrigeration system, which comprises a processing assembly and a detection assembly, the processing assembly comprises a gas-liquid separator, a pipeline and an oil filter, the gas-liquid separator is communicated with the oil filter through the pipeline, and the oil filter is communicated with the gas-liquid separator through the pipeline. The detection assembly comprises an absorption tank, an observation mirror, a drying filter and allochroic silicagel, and the observation mirror is fixed on the outer wall of the absorption tank; the absorption tank, the drying filter and the allochroic silicagel are arranged, in the using process, when the allochroic silicagel does not change color, it is indicated that no moisture exists in a refrigerant, and using of a refrigerating system is not affected, when the allochroic silicagel becomes blue, it is indicated that mo