The constant temperature and humidity tester is used to test and determine the parameters and performance of electrical, electronic and other products and materials after high temperature, low temperature, alternating damp heat or constant test temperature environment changes.
The heating device controls whether the constant temperature and humidity tester is the key to heating; when the controller receives the heating command, it outputs the voltage to the relay, and about 3-12 VDC is applied to the solid state relay; its AC terminal is equivalent to the wire connection. The contactor is also sucked at the same time, the voltage is heated at both ends of the heater, and the heat is brought to the box by the circulating fan, so that the constant temperature and humidity machine heats up, and the temperature reaches your set value quickly; the controller passes the plus In the solid state relay on-off regulation; we adjust the heat output on the screen by the constant temperature and humidity machine; this is the temperature control above 89 degrees, how to control the temperature stability below 89 degrees? Programmable constant temperature and humidity test machine It is the heat output through the solid state relay on one side; the other is through the compressor refrigeration cycle to achieve dynamic balance; the temperature is constant.
Cooling is an important part of the programmable constant temperature and humidity testing machine. It is an important parameter for determining the performance of a constant temperature and humidity machine. 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 gas, turns into high-temperature and high-pressure gas, releases heat by condensing into liquid, and removes heat through the fan. Therefore, the temperature of the constant temperature and humidity machine is caused by hot air, and then throttling to low-pressure liquid. Secondly, it passes through the evaporator to become a low-temperature low-pressure gas and finally returns to the compressor; the refrigerant absorbs heat in the evaporator to complete the gasification process and absorbs heat, thereby achieving the purpose of cooling, and completing the cooling process of the constant temperature and humidity machine.
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