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    Home > Active Ingredient News > Drugs Articles > Humidification method of constant temperature and humidity test chamber

    Humidification method of constant temperature and humidity test chamber

    • Last Update: 2019-01-02
    • Source: Internet
    • Author: User
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    At present, there are three kinds of humidification methods: spray humidification, steam humidification and shallow water pan humidification In fact, the humidification process of constant temperature and humidity test chamber is to increase the partial pressure of water vapor The initial humidification method is to spray water to the wall of the test chamber, and the water surface saturation pressure is controlled by controlling the water temperature The water on the surface of the chamber wall forms a large surface, on which water vapor pressure is added to the chamber by means of diffusion to increase the relative humidity in the chamber Spray method appeared in 1950s Defects of spray humidification method: At that time, the humidity was mainly controlled by simple on-off adjustment of mercury electric contact type conductivity meter The adaptability of water temperature control of large lag hot water tank was poor, so the control process was long, which could not meet the needs of more humidification requirements of alternating humidity and heat What's more, when spraying the tank wall, it was inevitable that water droplets would spray on the test sample to different degrees Pollution At the same time, there are certain requirements for drainage in the box This method was soon replaced by steam humidification and shallow water pan humidification Advantages of spray humidification method: Although the control transition process of spray humidification method is long, the humidity fluctuation is small after the system is stable, so it is more suitable for constant heat and humidity test In addition, during the humidification process, the water vapor will not overheat, which will not increase the extra heat in the system Another point is that when the spray water temperature is controlled below the temperature required by the test, the spray water has the dehumidification effect.
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