Have you forgotten the system principle of constant temperature and humidity test box?

^{The system principle of constant temperature and humidity test chamber}

^{Constant temperature and humidity test chamber equipment there are a few people have not enough understanding, the device is mainly by the control system, heating system, temperature and other components of the system, and these systems are respectively belong to two aspects of the electrical and mechanical refrigeration, here small make up take you to a preliminary understanding of the principle and the working process of the several system of the machine.}

^{The control system of constant temperature and humidity test chamber is the core of the comprehensive test chamber. It first determines the temperature rise rate and accuracy of the test chamber and other important indicators. Although most of the controller of the test chamber now adopts PID control, but there are also a few control methods combining PID and fuzzy control. Because the control system of the thermostatic oscillator basically belongs to the category of software, and this part in the process of using generally there will be no problems,}

^{The heating system of the constant temperature and humidity test chamber is relatively simple compared with the refrigeration system. It is mainly composed of high-power resistance wire. Because the heating rate required by the test chamber is relatively large, the power of the heating system of the test chamber is relatively large, and there is no heater in the bottom plate of the test chamber.}