Regarding the humidification method of the constant temperature and humidity test chamber, the most widely used in the industry is steam humidification and shallow water tray humidification. The shallow pan humidification method is also one of the important methods of humidification, and has an excellent feature of not increasing the heat in the test chamber. The following is a detailed introduction to the specific content of the shallow water tray humidification method.
The shallow water pan humidification method of the constant temperature and humidity test chamber requires designing a large enough water tray in the test chamber. The water tray position is generally in the bottom of the test chamber or in the side air duct. The heater is placed in the water tray, and the temperature of the water in the water tray is higher than the test temperature in the tank by appropriate heating to increase the water vapor pressure, so that the water vapor on the water surface can be diffused and convectively exchanged into the air. Add water vapor to achieve humidification. Moreover, in the case where the humidification is satisfied, the water temperature is not high, the water vapor does not overheat, and the heat in the test chamber is not excessively increased.
In addition, it is difficult to obtain low humidity in the shallow water tray humidification method, and the water temperature is lowered when the refrigeration is used, thereby causing a decrease in humidity. And now the wet heat box and the high and low temperature box are designed as one. When the temperature test is carried out, the water will inevitably have an influence. It is necessary to discharge the water out of the box, which increases the workload for designing and using the constant temperature and humidity test chamber. The equipment does not need to be used for a long time, and the water tray is easy to breed microorganisms and various bacteria, so it is necessary to pay attention to regular cleaning.
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