High-precision constant temperature and humidity environments such as computer rooms, satellite mobile communication stations, large medical equipment rooms, laboratories, test rooms, and precision electronic instrument production workshops have high requirements for various indicators such as air temperature, humidity, cleanliness, and airflow distribution. They must be guaranteed by temperature and humidity control equipment that operates safely and reliably 24 hours a day, 365 days a year.
The importance of temperature and humidity to high-precision constant temperature and humidity environments
Electronic equipment is the main configuration of high-precision constant temperature and humidity environments, and is easily affected by temperature and humidity. Therefore, the good operation of electronic equipment requires strict or even harsh temperature and humidity in the computer room environment.
The influence of temperature
For electronic equipment, high temperature will lead to reduced performance of electronic components, shortened service life, and reduced insulation performance; low temperature will change the parameters of capacitors, inductors, and resistors, directly affecting the stable operation of electronic equipment.
For example, for semiconductor components, the reliability will decrease by about 25% for every 10℃ increase in room temperature within the specified range; for capacitors, the service life will decrease by 50% for every 10℃ increase in temperature; for insulating materials, if the temperature is too high, the structural strength of the circuit board will weaken; if the temperature is too low, the insulating material will become brittle, which will also weaken the structural strength; for recording media, too high or too low temperature will lead to data loss or access failure.
Impact of humidity
When the relative humidity is too high, water vapor forms a water film on the surface of electronic components or dielectric materials, which can easily cause a path between electronic components, leading to leakage; and it will cause oxidation and corrosion of metal materials, and weaken the insulation strength of insulating materials; when the relative humidity is too low, it is easy to generate a high static voltage, which will damage the computer version. Experiments show that in the computer room, if the relative humidity is 30%, the static voltage can reach 5000V, the relative humidity is 20%, the static voltage can reach 10000V, and the relative humidity is 5%, the static voltage can reach 20000V, and the impact of static voltage up to tens of thousands of volts on computer equipment is obvious.
Constant temperature and humidity machine VS ordinary air conditioner + dehumidifier
Slight fluctuations in temperature and humidity will affect the computer room. In order to ensure that the equipment in the computer room can operate continuously, stably and reliably, it is necessary to discharge the heat continuously emitted by the equipment and other heat sources in the computer room, maintain the constant temperature and humidity in the computer room, and control the dust content of the air in the computer room. The temperature and humidity control equipment in the computer room must have the ability to supply air, return air, heat, humidify, cool, dehumidify and purify air. 
Constant temperature and humidity machine is a temperature and humidity control equipment dedicated to the computer room, also called constant temperature and humidity air conditioner, with four main functions of dehumidification, humidification, refrigeration and heating. Constant temperature and humidity machine has higher accuracy and more complete functions, which meets the strict requirements of the computer room for temperature and humidity control.
1. Number of equipment
The constant temperature and humidity machine combines the temperature control function of the air conditioner and the dehumidification function of the dehumidifier into one, combining two independent functional devices into one device, reducing the number, saving environmental space, and facilitating layout.
2. Energy consumption
If ordinary air conditioners and dehumidifiers are used for temperature and humidity control, the heat generated by the dehumidifier during operation will increase the indoor air conditioning load and increase the optional capacity of the air conditioner. The constant temperature and humidity machine can discharge excess heat from the room by switching its own condensation heat, and realize cooling operation in places where cooling is required, and heating operation in places where heating is required.
3. Investment
In places where the indoor humidity load (the amount of humidity that needs to be removed from the room to maintain a constant indoor humidity content) is low, the initial investment of the two solutions is similar, but in some places with higher humidity loads, the investment cost of the constant temperature and humidity machine is more advantageous.
4. Control
The independent dehumidification capacity of the air conditioner is weak, and the ordinary dehumidifier basically does not have the temperature adjustment function. In addition, the temperature and humidity accuracy requirements of the machine room are high. The temperature adjustment function of the ordinary air conditioner and the dehumidification function of the ordinary dehumidifier cannot meet the standards in terms of accuracy. The constant temperature and humidity machine has a high-precision and responsive temperature and humidity adjustment function, and the control accuracy is higher.
Therefore, for places such as computer rooms that have high requirements for high-precision constant temperature and humidity, a constant temperature and humidity machine is a more ideal temperature and humidity regulation equipment.