The special constant temperature and humidity air conditioner for the computer room has the following characteristics: large air volume, small temperature difference, and high sensible heat ratio; the heat load of the computer room changes greatly, usually varying between 10% and

The constant temperature and humidity air conditioner dedicated to the computer room has the following characteristics: large air volume, small temperature difference, and high sensible heat ratio; the heat load of the computer room changes greatly, usually varying between 10% and 20%; the method of air return and return There are various types, including upper air supply, lower air supply, upper return air, lower return air, side return air, etc. The most commonly used ones are the upper air supply and lower return air and the lower air supply and upper return air type; the reliability is high, and the dedicated constant temperature and humidity for the computer room is The control system and functions of the air conditioner are much more complete than ordinary comfort air conditioners; it has year-round operation reliability and all-weather operation.

Based on the characteristics of the constant temperature and humidity machine air conditioner in the computer room, when the purchaser puts forward the purchase demand for a dedicated constant temperature and humidity air conditioner for the computer room, he needs to pay attention to the differences from the purchase requirements for general air conditioners. When selecting and filling in purchasing requirements, the following factors should first be considered:

　1. Environmental heat sources should be considered when selecting

Based on the calorific value of the equipment in the computer room, the computer room area, and the computer room conditions (including floor height, sealing, decoration, outdoor unit installation location, etc.) , local climate conditions, etc., estimate the total cooling capacity, total air volume, humidification volume and other parameters of the computer room air conditioner, and then select the appropriate equipment capacity (certain equipment backup can be considered).

　2. Consider the air-conditioning cooling method when selecting.

　Select the appropriate air-conditioning cooling method for the computer room (air-cooled, water-cooled, dual cooling sources, etc.) according to the overall structure of the entire building.

　3. The air supply method should be considered when selecting the model

Based on the structural characteristics of the computer room itself and user requirements, the air supply method should be selected reasonably. The air supply form of the special air conditioner in the computer room is mostly the upper-lower return type and the lower-lower upper-return type. When selecting the lower air supply equipment, the static pressure box under the electrostatic floor is used as the air conditioner. To ensure smooth air supply, the height of the electrostatic floor must be guaranteed to be 300. If you choose upper air supply equipment, you can use the hood air supply method. Generally speaking, the headroom of this kind of computer room is more than 2.8 meters, and the area of ​​the computer room cannot be too large, otherwise uneven air supply will occur.

　4. When selecting, you must consider energy saving and future operating costs.

　From the perspective of energy conservation, it is advisable to choose a dual-cold source type air conditioner. This is an energy-saving air conditioner, and its energy-saving power resources are more energy-saving than a simple electric refrigeration air conditioner of the same capacity. above 40%.

5. Air conditioners with purification systems need to consider the external residual pressure requirements

Air conditioners without purification requirements do not have high requirements for the external residual pressure of the air conditioner. They must first overcome the air return ducts, valves, diffusers , Primary filter , etc. However, a system that has constant temperature and humidity requirements and requires purification level control has higher requirements for the external residual pressure of the air conditioning unit. Generally, the total system resistance is between 1100Pa and 1400Pa. It mainly overcomes the problems of air supply and return ducts, valves, and fans. The resistance of the flow filter, primary effect filter, medium effect filter , high efficiency filter , etc. needs to be considered when selecting the model. The external residual pressure requirements need to be considered.