Frame structure of constant temperature and humidity test chamber

HUANYI constant temperature and humidity test chamber frame structure-heating

    Compared with the refrigeration system, the heating system of the constant temperature and humidity test chamber is relatively simple. It is mainly composed of high-power resistance wire. Due to the fast heating rate required by the test box, the heating system power of the test box will also increase with the requirements. Moreover, a heater is also provided on the bottom plate of the test box.

HUANYI Constant Temperature and Humidity Test Chamber Frame Structure One Control

    The constant temperature and humidity test box control system is the core of the comprehensive test box, which determines the temperature rise rate and accuracy of the test box and other important indicators. At present, most of the controllers of the test box adopt PID control, and a small number of them adopt a combination of PID and fuzzy control. Because the control system basically belongs to the category of software, and this part is generally not problematic during use.

HUANYI constant temperature and humidity test chamber frame structure-humidity

    The temperature system of the constant temperature and humidity test chamber is divided into two subsystems: humidification and dehumidification. The humidification method generally uses steam humidification, that is, low-pressure steam is directly injected into the test space for humidification. This kind of humidification method has high humidification ability, high speed and sensitive humidification control, especially when the temperature is lowered, it is easy to realize forced humidification.

    There are two dehumidification methods: mechanical refrigeration dehumidification and dry dehumidification. The dehumidification principle of mechanical refrigeration dehumidification is to cool the air below the dew point temperature to condense and precipitate the water vapor that is greater than the saturated moisture content, thus reducing the humidity. Dryer dehumidification is to use an air pump to extract the air in the test box and inject dry air. At the same time, the humid air is sent to the recyclable dryer for drying, and then sent to the test box after drying, and the cycle is repeated for dehumidification. .