1Is the heating device a key link in controlling the temperature and humidity of the constant temperature and humidity test chamber

　　2When the controller receives a temperature command, it will output voltage to the relay, approximately3-12Apply direct current to the solid-state relay; Its communication end is equivalent to a wire connection; The contactor also closes simultaneously, and there is voltage at both ends of the heater to generate heat. The heat is carried into the box by the circulating fan, which heats up the constant temperature and humidity testing machine

　　3The temperature is about to reach your set value; The controller adjusts the on-off state of the solid-state relay by adding it

　　4We adjust the heat generation by observing the heating output on the screen in a constant temperature and humidity test chamber; This is in89Temperature control above degrees Celsius, in89How to control temperature stability below degrees Celsius? The constant temperature and humidity test chamber generates heat and output through a solid-state relay on one side; Furthermore, dynamic equilibrium is achieved by cooling through a compressor refrigeration cycle; The temperature remains constant.

2： Cooling ability

　　1The important part of the constant temperature and humidity test chamber is to determine the performance of a constant temperature and humidity machine, which includes four major components: compressor, condenser, throttling device, and evaporator.

　　2The compressor is the heart of the refrigeration system, which sucks in low-temperature and low-pressure gas, turns it into high-temperature and high-pressure gas, condenses it into liquid to release heat, and takes away the heat through the fan. Therefore, under the constant temperature and humidity machine, there is hot air, which is then throttled to become low-pressure liquid, and then becomes low-temperature and low-pressure gas through the evaporator before returning to the compressor; The refrigerant absorbs heat in the evaporator to complete the gasification process and absorb heat, achieving the purpose of refrigeration and completing the cooling process of the constant temperature and humidity machine.

3： Humidification capacity

4： Moisture reducing ability

The dehumidification system is also completed by the refrigeration system, with the evaporator placed in a constant temperature and humidity test chamber; It is relatively cold, and the high humidity gas inside the constant temperature and humidity test chamber condenses into liquid when it meets cold objects; The high humidity gas in the box will be reduced repeatedly, achieving the purpose of dehumidification.