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Guangdong Lijia Analyzes the 6 Structures of [Constant Temperature and Humidity Test Chamber] for You

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Release date: 2019-05-07

1.Refrigeration

The refrigeration system is a key part of the test chamber. General refrigeration methods include mechanical refrigeration and auxiliary liquid nitrogen refrigeration. Constant temperature and humidity box refrigeration system has two parts, divided into high temperature and low temperature, each part is a relatively independent refrigeration

system. The transpiration of the refrigerant in the high-temperature part absorbs the heat of the refrigerant from the low-temperature part and vaporizes; the transpiration of the refrigerant in the low-temperature part is absorbed by the cooled air in the box to obtain cold.

2.Heating

The heating system is relatively simple compared to the refrigeration system, and it is mainly composed of high-power resistance wires. This is because the test chamber requires a fast heating rate, and its heating system power will also increase with the requirements.

3.Manipulation

The control system is the center of the test chamber, which determines the heating rate and accuracy of the test chamber and other important indicators.

4.Humidity

Humidity system is divided into two sub system of humidification and dehumidification. Generally, steam humidification is used, which is fast, sensitive in humidification control, and easier to complete forced humidification when cooling. Dehumidification has mechanical dehumidification and dry dehumidification. Mechanical dehumidification is to cool the air

However, below the dew point temperature, the water vapor greater than the full moisture content is condensed and separated. The boring device is to use the air pump to extract the air in the test box and inject the boring air.

5.Sensor

There are mainly temperature and humidity sensors. The temperature sensor uses more platinum electric group and thermocouple. The measurement method of humidity has dry and wet bulb thermometer method and solid state electronic sensor direct measurement method.

6.Supply air circulation

The air circulation system consists of a centrifugal electric fan and an electrical organization that drives its operation to provide air circulation in the test chamber.

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