Moistureproof box made by the physical way of absorbing water with absorbent beads, uses desiccant (scientific name: Van der Waals force or molecular sieve) to heat and evaporate the absorbed water at 170℃, and uses shape memory alloy to control the intake and exhaust valves to complete dehumidification. It is characterized by low cost and has been widely used for a long time. It should be noted that the temperature in the box will rise when heating and dehumidification, and there will be a wide range of moisture regain (many brands have tried). After being electrified, chemical moisture absorption and dehumidification will be heated for the first time. After the moisture contained in the absorbent material evaporates, it will begin to absorb the moisture in the box. After about three and a half hours, it will be dehumidified for forty minutes. Each dehumidification cycle dehumidifies once every four hours and can be repeated up to six times a day. Because of this feature, humidity control can only be rough. For example, it is desirable to keep the humidity at the position m at about 40%RH. When the humidity reaches, the control system cannot prevent the desiccant from absorbing water, and it is possible that the humidity will continue to drop below 30%. When the humidity rises above 40%RH, dehumidification will start, which takes 40 minutes. At this time, the humidity in the box will quickly rise above 15%RH, so that the fluctuation can reach above 30%RH, and the items we keep are more likely to deteriorate and age. Imagine if the temperature of your living environment drops above 20℃, can you stand it? The moistureproof box manufactured in this way can only control the humidity in the box within a certain range, because this method does not determine the working state of the dehumidifier core according to the humidity in the box, but sets a fixed time program to turn on and off the movement when the time comes, so the humidity value is unstable. Strictly speaking, such a dehumidified moistureproof box cannot be called an electronic moistureproof box. Because of its slow dehumidification, it takes 40 minutes to start dehumidification and 6 ~ 24 hours to complete the 40% RH humidity you want. It's no use if you open the door once or twice a day to get something. Because the early use of electronic dehumidification is protected by patents, manufacturers in moistureproof box can only use physical moisture absorption to produce moistureproof box, which is why many commercial advertisements strongly recommend physical moisture absorption moistureproof box.
Electronic refrigeration technology is a low-temperature dehumidification technology using semiconductor wafers, which is a material used in American space science and technology. It is a wafer freezing material. It uses direct current, with minimal power consumption, safety, stability, environmental protection and strong dehumidification ability. It can remove 40% moisture in three hours. It is important that the dehumidification process does not regain moisture. Even after the power failure, the humidity will rise slowly and will not produce thermal effects. This technology is to absorb and condense the water vapor in the cabinet and discharge the liquid. It is the most advanced dehumidification technology in civil electronic moistureproof box at present. Microcomputer control, can set the dryness. According to the humidity value in the box, the operation of the dehumidifier core is automatically adjusted to start and close, so that the humidity in moistureproof box is accurately controlled at a certain humidity value, and the dehumidification speed is fast. Keep moistureproof box in a stable humidity range. There is no need to worry about the problem of too high or too low humidity, and there is no need to "dry" this process every time you use it. The electricity consumption is basically negligible, about a few dollars a month. The electronic moistureproof box has a large capacity and can hold many things. As long as the humidity is set, you just take things out and put them in after use. The advantage is convenience. A veritable electronic moistureproof box has the disadvantage of being a little more expensive.
At present, several brands of electronic moistureproof box adopt the method of wafer refrigeration and dehumidification, but generally speaking, the electronic moistureproof box manufacturers that do better in China are basically in Zhuhai, Guangdong. After Baidu's wafer refrigeration and dehumidification, we found that there are: Zhuhai Electronics Co., Ltd. and Dr. moistureproof box.
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