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There are many kinds of dry cabinet currently in the market
,their dehumidifying principle is different, price is different, of course
quality is different, so how can we distinguish them out? Today we will help
you in this field:
1.Traditional dehumidification
The basic dehumidification principle of dry cabinet adopts
“zeolites” or “molecular sieves” as the dry unit of moisture absorption
combined with metal or humidity sensors. Due to the saturation of hygroscopic
materials, domestic and foreign brands that can be seen in the market need to
have a regeneration cycle to “activate” its hygroscopic function. In general, 3
hours is the “moisture absorption” cycle, and 1 hour is the “regeneration”
cycle. It runs again and again. Due to the need to dry and regenerate and stop
dehumidification after saturation, the humidity in the cabinet will rise and
fluctuate in a specific temperature and humidity environment.
2.Vacuum dehumidification
Vacuum the drying cabinet to achieve the purpose of
removing moisture. It is composed of cabinet and vacuum pump. Due to the vacuum
status in the cabinet, the water content in the internal air is very low.
However, the requirements for atmospheric pressure and sealing of the cabinet
and door are very high, and compared with the external size of the cabinet, the
internal effective use space is smaller. And can only be realized in a small
cabinet, the use of vacuum, the removal and release of articles must be
reduced, it is not convenient to use, and the continuous noise emitted by the
vacuum pump is disturbing, and the purchase cost is expensive. At present, this
method is not widely used.
Nitrogen drying is widely used in the
production area in microelectronics industry, and it is used more in ultra-low
humidity and anti-oxidation purpose. Its drying is achieved by filling the
sealed cabinet with nitrogen to replace oxygen-containing air. The main problem
with the use of nitrogen cabinets is that the operating cost is too high.
