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The micro fluctuation of temperature and humidity will affect the computer room. In order to ensure the continuous, stable and reliable operation of the equipment in the computer room, it is necessary to discharge the heat continuously emitted by the equipment and other heat sources in the machine room, maintain the constant temperature and humidity state in the machine room, and control the dust content in the air of the machine room. Room temperature and humidity control equipment must have the ability of air supply, return air, heating, humidification, cooling, dehumidification and air purification. constant temperature and humidity machine is a special temperature and humidity control equipment for the computer room, also known as constant temperature and humidity air conditioning, with four main functions of dehumidification, humidification, refrigeration and heating.  then, the ordinary air conditioner with temperature regulation function and the dehumidifier with humidity regulation function have relatively low price and low energy consumption. Can they be used to control the temperature and humidity in the computer room?  the answer is: no! Why?  constant temperature and humidity machine has higher accuracy and better function, which meets the strict requirements of temperature and humidity control in the computer room. The constant temperature and humidity machine combines the temperature regulating function of air conditioner and the dehumidification function of dehumidifier into one, which can reduce the quantity, save the environment space and facilitate the layout. Energy consumption 2. Energy consumption  if ordinary air conditioner and dehumidifier are used for temperature and humidity control, during operation, the heat production of dehumidifier will increase the load of indoor air conditioning and increase the optional capacity of air conditioner. By switching its own condensation heat, the constant temperature and humidity machine can discharge the excess heat out of the room, and realize the cooling operation in the place where the temperature needs to be lowered, and the temperature rising operation in the place where the temperature needs to be raised. Investment  3. Investment when the indoor humidity load (the amount of moisture to be removed from the room to maintain a constant indoor moisture content) is low, the initial investment of the two schemes is similar, but in some cases of higher humidity load, the investment cost of the constant temperature and humidity machine is more advantageous. Control4, control air conditioning independent dehumidification ability is weak, ordinary dehumidifiers basically do not have the function of temperature regulation, and the machine room has high requirements on the accuracy of temperature and humidity, the temperature regulation function of ordinary air conditioner and the dehumidification function of ordinary dehumidifier can not meet the standard in accuracy. The constant temperature and humidity machine has the function of high precision and sensitive temperature and humidity regulation, and the control precision is higher. Therefore, the constant temperature and humidity machine is a more ideal temperature and humidity regulation equipment for the room and other places with high requirements for temperature and humidity accuracy.