Constant temperature and humidity machine widely used in the electronic appliances,communication,chemical industry,metal,rubber,toys, aerospace,aviation,and other industries.

Constant temperature and humidity test box is the product that put in a specified temperature and humidity,seeing the product's high temperature resistant,good low temperature resistance,and humidity ability,so how does Constant temperature and humidity test box  keep heating,cooling,add wet,drop wet ability at the same time.

Warming device is the key link to control the constant temperature and humidity.It is the controller that get warming instructions will output voltage about 3v to 12v dc in solid relay;It is the equivalent of wires connected to the AC side,contactor also pull the heater voltage to both ends of heat,the circulation driven by the heat into the box.Make the constant temperature and humidity machine heating up,when the temperature reached you value,controller added to the solid state relay to break regulation;we consider the output from the constant temperature and humidity test box on the screen to adjust how much heat calorific value;This is in more than 89 degrees.How to control the temperature stability under 89 degrees temperature?On the one hand constant temperature and humidity test box is output fever through the solid state relay;on the other hand through the compressor refrigeration cooling to keep a dynamic balance;Temperature constant.

Cooling is an important key link in constant temperature and humidity machine,an important parameters to judge a constant temperature and humidity machine's performance.It including compressor,condenser,evaporator throttle device,four composition.Compressor is the heart of refrigeration system.It indraft the low pressure gas,low temperature and transform into high temperature and high pressure gas,through the condensing into liquid to gives off heat, through the fans to take away heat, this is the reason why the constant temperature and humidity test box's bottom is hot,and then to become low pressure.The liquid to throttle second through the evaporator become low temperature of the low pressure gas finally returned to the compressor;Refrigerants in the evaporator absorb heat in complete gasification process heavy and absorb heat,finish the purpose to refrigeration,finish the constant temperature and humidity test box to cooling.

Humidification system is similiar with heating system.It is a program of heater heating water into steam process.Finish the purpose of constant temperature and humidity machine humidifying.

Drop wet system is also depend on refrigeration system to accomplish,put evaporator inside the constant temperature and humidity machine.More cold,the high humidity gas inside the constant temperature and humidity machine meet with cold object would condensing into a liquid.Repeat this little box of high moisture experience,achieve the purpose of lower humidity.Now many LED manufacturers will buy constant temperature and humidity box,or Thermal Shock Chambers.Products met the needs of enterprise development,high temperature. Low humidity for the products will have a negative impact,use the constant temperature and humidity box and Thermal Shock Chambers to do a test,looks the products meet high temperature,humidity,low temperature...... Special is LED industry. LED often often control the products a certain range of the temperature and humidity.