How to control the temperature and humidity inside the tape constant temperature and humidity test chamber , tape temperature and humidity test chamber is the product on the provisions of the temperature and humidity, see the product's high temperature, low temperature, and humidity resistance, then the temperature and humidity test chamber at the same time With heating, cooling, humidification, dehumidification capacity.
   Heating device is to control the constant temperature and humidity testing machine is not the key to increase the temperature; it is the controller to get the temperature command will output voltage to the relay, about 3-12 VDC added to the solid state relay above; its AC terminal is equivalent to wire connection Pass; the contactor also sucks at the same time, the heater has a voltage at both ends to make it heat, bring the heat to the box through the circulating fan, so that the constant temperature and humidity testing machine heats up, then the temperature reaches your set value; the controller By adding in the solid-state relay on-off adjustment; we look at the screen temperature and humidity control how much heat to adjust the heat; this is more than 89 degrees temperature control, in the 89 degrees below the temperature stability how to control it? A constant temperature and humidity machine is how much heat is generated by one side of a solid state relay; the other is through a refrigeration cycle of the compressor to achieve a dynamic balance; the temperature is constant.
   Cooling is an important part of the constant temperature and humidity test chamber of the tape . It is an important parameter for determining the performance of a constant temperature and humidity chamber. It consists of four components: compressor, condenser, throttling device, and evaporator. The compressor is the heart of the refrigeration system. It inhales low-temperature and low-pressure gases, turns into high-temperature and high-pressure gases, and releases heat by condensing into liquids. The heat is taken away by fans. Therefore, under the constant temperature and humidity box is hot air, and then it is throttled to low-pressure liquids. Secondly, through the evaporator, it becomes the low-temperature and low-pressure gas and finally returns to the compressor; the refrigerant absorbs heat in the evaporator to complete the gasification process and absorb heat to achieve the purpose of cooling, and completes the process of cooling the constant temperature and humidity.
   The humidifying system is almost the same as the heating system; it is the heating of the heater water into a steam process; the purpose of humidification of the constant temperature and humidity machine is accomplished.
The dehumidification system is also completed by a refrigeration system. The evaporator is placed in a constant temperature and humidity test chamber. When it is relatively cold, the high humidity gas in the tape constant temperature and humidity test chamber will meet the cold object and condense into a liquid. In this way, the high humidity gas of the tank will be Rarely, achieve the purpose of dehumidification.