1.By from using the "zeolite" as the main body of moisture drying equipped with earlier memorized-metal to current humidity sensor, it’s basic principles of dehumidification and controlling of desiccant cabinets or auto electrical dry cabinet. Because of limitation of saturation moisture absorption for each kind of main body dry material, currently almost all brands on the market you find for both industrial and home use are required recycle or called "activation" for drying main body material. 3-5 hours in general as "absorption" cycle, one-hour "regeneration" cycle. During recycle period, moisture absorption function is stopped and it leads to a rise of internal humidity level and make a humidity fluctuations during whole running processing. For large internal volume cabinets, it also shows you slow dehumidification (>2 hours back to setting for whole cabinet) and worse uniformity in side of whole cabinet.
2.Nitrogen storage
N2 is commonly used for MSD’s anti-oxidation and drying purpose in most of microelectronics industries. With very low dew point and characters of inertia gas replace internal air and keeps moisture out al time. It mainly has anti-oxidation function but the main problem counters higher operating costs and waste energy.
As a typical example from local user, A volume 1000 liters cabinet with 20 liters per minute flow rate of nitrogen. the annual consumption of N2 is about USD7K.
Also we shall have a caution for carefully over use N2 inside a closure environment. because of over use of nitrogen will reduce the oxygen in indoor air. People may have common symptoms such sleepy and even worse like hard breath occurred . In addition very small flow rate of nitrogen use concerning cost saving causes humidity inside cabinet stay at high most time and very long recovery time. As well. Monitoring most production line, it’s obvious internal humidity changing slowly and may have impact on final quality of products.
3. Refrigeration-type dehumidifying
It’s mainly through semiconductor refrigeration or mechanical refrigeration system, moisture in air condense on heat exchanger once low surface temperature of heater exchanger and then through drain outer . The disadvantages is not able to run low humidify below 30% so that it’s not recommended for application of anti-oxidation and most of MSD moisture proofing. Also cost of equipment is quite higher and even running cost.
Recently on the market you can find one of kind of dry cabinet that uses Peltier" effect as semiconductor refrigeration to perform dehumidifying. Although it’s quite energy saving and low noise but Because of still belong to refrigeration-type dehumidifiers , so not capable of working at low humidity range but fine for home use.
4. All CBI series dry cabinets equip with innovation air dry unit in stead of desiccant one. Due to compressed air –CDA is easy to get in most areas of lines. Since the outstanding performance on dehumidifying rate, speedy recovery time and perfect uniformity which is particular design for those process where you have frequent load/unload process.
It is obvious that new generation and innovation dry cabinets overcome these disadvantages other method have ( Click “products “ )
