When the laboratory uses a small constant temperature and humidity tester to test, the internal temperature and humidity of the small constant temperature and humidity tester should be controlled to ensure better test results. So what is the way to control the internal temperature and humidity of the small constant temperature and humidity tester?
Below, the professional production of small constant temperature and humidity testing machine Dongguan Ai Sizhen Instrument Technology Department for everyone - about the small temperature constant humidity test machine internal temperature and humidity control methods: mainly heating control and cooling control method.
* Heating control:
1. The small constant temperature and humidity tester is mainly heated by the heating device.
2, heating device:
A. The electric appliance inputs voltage by the controller, and the input voltage is about 3-12 volts.
B. The AC end of the wire is connected.
C. The voltage across the heater causes the suction contactor to heat up.
D. The small constant temperature and humidity test machine drives the heat to the inside of the box by the circulating fan.
3. When the temperature reaches the set value quickly, the controller adjusts the on-off by adding the solid state relay.
4, adjust the calorific value:
A, 89 degrees temperature control mainly depends on the small constant temperature and humidity test machine to see how much heating power on the screen to regulate the heat.
B, 89 degrees below temperature control: 1 on one side through the solid state relay heat output. 2 The temperature is reached by the cooling cycle of the compressor refrigeration cycle, and the temperature is constant.
* Cooling control:
1. The performance of the small constant temperature and humidity tester is mainly judged according to the cooling capacity.
2. The small constant temperature and humidity test machine consists of four major parts: compressor, condenser, throttling device and evaporator.
3. The compressor draws in low-temperature and low-pressure gas and becomes the main component of the high-temperature and high-pressure gas system.
4, by condensing into a liquid to release heat, the fan takes away heat, resulting in a small constant temperature and humidity test machine under the hot air, and then through the throttling to a low-pressure liquid, followed by the evaporator into a low-temperature low-pressure gas and finally returned to the compressor.
5. The refrigerant absorbs heat in the evaporator to complete the gasification process and absorb heat, so as to achieve the purpose of refrigeration, and complete the cooling process of the small constant temperature and humidity tester.
The above are two methods for controlling the internal temperature and humidity of the small constant temperature and humidity tester. I hope that it will help you to test the small constant temperature and humidity tester to ensure that the product quality needs to be improved.
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