Study on the humid and humid system of constant temperature and humidity chamber (1)
Constant temperature and humidity box In order to achieve the test conditions, it is inevitable to humidify the test box. This paper intends to analyze a large number of various methods currently used in the damp heat test chamber, pointing out their respective advantages and disadvantages and recommended use. condition.
1. Shallow trough humidification is the most humidifying method used by domestic first-line brands. Shallow trough humidification has the advantages of steam humidification and spray humidification. The shallow trough is designed with a large enough surface in the test chamber. A heater is placed in the sink. The water vapor pressure on the surface of the water can continuously replenish water into the air by diffusion and exchange of fluid, but since the area of ​​the water tank cannot be made very large, the diffusion and the exchange of the liquid are not very intense. In the case of meeting the test humidification requirements, the water temperature in the water tank is not required to be too high, and the superheat of the water vapor is significantly reduced.
2. Equal humidification: Ultrasonic humidifier or micro-mist humidifier; equal humidification is a method of humidifying the evaporation area of ​​water in an effective confined space, and finally increases the evaporation and increases the relative humidity of the air.
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