The constant temperature and humidity testing machine is the product placed at the specified temperature and humidity, depending on the product's high temperature resistance, low temperature resistance, and humidity resistance, then the constant temperature and humidity testing machine also has the ability to heat, cool, humidify, and dehumidify. The heating device is the key link to control whether the constant temperature and humidity testing machine is heated; it is the controller that outputs the voltage to the relay when the heating command is obtained, and about 3-12 volts DC is added to the solid state relay; its AC terminal is equivalent to the wire connection The contactor also pulls in at the same time, there is a voltage at both ends of the heater to make it heat, and the heat is brought into the box by the circulation fan, so that the constant temperature and humidity machine heats up, and the temperature quickly reaches your set value; the controller passes Added to the on-off adjustment of the solid state relay; we see how much heating is output on the screen in the constant temperature and humidity machine to adjust the calorific value; this is the temperature control above 89 degrees, how to control the temperature stability below 89 degrees? The constant temperature and humidity machine is in On the one hand, how much heat is output through the solid state relay; on the other hand, the compressor refrigeration cycle is cooled to achieve dynamic balance; the temperature is constant. Cooling is an important part of the constant temperature and humidity testing machine, and is an important parameter to determine the performance of a constant temperature and humidity testing machine. It includes four components: compressor, condenser, throttle device, and evaporator. The compressor is the heart of the refrigeration system. It sucks in low-temperature and low-pressure gas, turns it into a high-temperature and high-pressure gas, releases heat by condensing into liquid, and takes away heat through the fan, so the hot air is the reason below the constant temperature and humidity machine, and then throttles to low-pressure liquid , Secondly, it becomes low-temperature and low-pressure gas through the evaporator and finally returns to the compressor; the refrigerant absorbs heat in the evaporator to complete the gasification process and absorbs heat, so as to achieve the purpose of refrigeration and complete the cooling process of the constant temperature and humidity machine. The humidification system is roughly the same as the heating system; it is the process of the heater heating water into steam; the purpose of humidifying the constant temperature and humidity testing machine is completed. The dehumidification system is also completed by the refrigeration system. The evaporator is placed in the constant temperature and humidity test machine; it is relatively cold, and the high humidity gas in the constant temperature and humidity machine will meet the cold objects to condense into a liquid; so the repeated high humidity gas in the cabinet , To achieve the purpose of dehumidification. Mianyang Shengshi Health Technology Co.,Ltd , https://www.shengshiaminoacid.com