Constant temperature and humidity test chamber scientific name "constant temperature and humidity testing machine" or "constant temperature and humidity test box" "programmable hot and humid alternating test box" and so on, the main purpose of the equipment is used to test the performance of materials in a variety of different environments and test various materials heat resistance, cold resistance, dryness, humidity resistance. The main purpose of the equipment is used to test the material in a variety of different environmental performance equipment and test a variety of materials, heat, cold, dry, wet performance. Then what are the main advantages and disadvantages of the equipment? Here to understand it:
The constant temperature and humidity test box humidification process actually means to improve the water vapor pressure, and the most initial humidification is to the test box wall spray water, by controlling the water temperature so that the water surface saturation pressure can be controlled. And the box wall surface of the water to form a larger surface, in this surface to the box through the diffusion of the way to the box to join the water vapor pressure to make the test box in the relative humidity rise, this method appeared early in the last century in the 1950s.
Then constant temperature and humidity test box due to the humidity control is mainly through the mercury electric contact method conductive table to carry out the more simple switching regulation, and for the big lag hot water tank water temperature control adaptability is poor, so the control of the transition process is longer, and can not meet the alternating humidity and heat on the humidification requirements of the need for more, and more importantly in the case of the wall of the spraying time, will always be able to avoid the ground there are Water droplets dripping on the specimen so as to form different degrees of contamination of the specimen. At the same time to the box drainage requirements. This method was quickly replaced by steam humidification and shallow water tray humidification. But this method still has some advantages.
While the constant temperature and humidity test chamber control transition process is relatively long, but in the system stabilized humidity fluctuations for the smaller, more suitable for constant heat and humidity test. In addition, the water vapor in the humidification process, but the heat will not increase the additional heat in the system. There are also in the control of the spray water temperature becomes lower than the temperature of the test requirements of the point, the spray water can achieve the role of dehumidification.
Now with the humidity and heat test by constant humidity and heat to alternating humidity and heat and the development of the requirements of a faster humidification of the ability to respond, spray humidification will not be able to meet the requirements of the constant temperature and humidity test chamber steam humidification and shallow water tray humidification method began to be adopted and developed in large quantities.
Reference Model:
LRHS-101-LH
LRHS-225-LH
LRHS-504-LH
LRHS-800-LH
LRHS-1000-LH<