How to humidify the constant temperature and humidity test box?What is its principle?

IP9Textile Testing Instruments, Testing Equipment Manufacturer

IP9Textile Testing Instruments, Testing Equipment Manufacturer

How to humidify the constant temperature and humidity test box? What is its principle?

IP9Textile Testing Instruments, Testing Equipment Manufacturer

IP9Textile Testing Instruments, Testing Equipment Manufacturer

The method of constant temperature and humidity test box dehumidification currently uses two types, one is frozen dehumidification method, and the other The species is a solid humidone dehumidification method. The former condenses the water vapor in the air on the refrigerator to form water or frost. Because the test process of the constant temperature and humidity test box is usually longer, the frost of the cooler will affect the dehumidification effect. Generally, this phenomenon should be avoided as much as possible. Above 0 ° C. At this time, when the humidity in the box is described by dew points, the dew point temperature is about 5-7 ° C. This dew point temperature has met the requirements of the current test method, and it is very convenient to use at the same time, so the use of ZUI is wide. When a lower dew point is required, a solid humidone is usually used to further wet the wetting agent. The surface water vapor pressure of this type of hygroscopic agent can obtain a dew point temperature of about -70 ° C at hundreds to dozens of PPMs. This method is very inconvenient to use or buy special equipment. It is only adopted in some experiments with special requirements. For example, when the internal combustion engine is used at a low temperature or running test, it is required to replenish a large amount of air in the box when the fuel supply is burned. In order to prevent a large amount of frost of water vapor in the new air in the low -temperature box, a large amount of frosting in the low temperature box needs to be made with solid moisture absorption principles and can run continuously.

IP9Textile Testing Instruments, Testing Equipment Manufacturer

IP9Textile Testing Instruments, Testing Equipment Manufacturer