The composition of precision air conditioning includes not only compressors, condensers, expansion valves, and evaporators, but also fans, air filters, drying filters, humidifiers, heaters, sight glasses, oil storage tanks, solenoid valves, etc. Therefore, in our daily computer room management work, the management and maintenance of precision air conditioning are mainly aimed at maintaining the above components.

Daily maintenance and management of precision air conditioning

1. Maintenance of control system:
1) Check whether the various functions and parameters of the air conditioning system are normal from the display screen of the air conditioning system;

2) If there is an alarm, check the alarm record and analyze the cause of the alarm;

3) Check if the temperature and humidity sensors are working properly;

4) It is important to have a clear understanding of the operating parameters of the compressor and humidifier, especially during the first inspection in the morning. It is important to compare the operating parameters of the compressor from the previous night with those from the same period before

2. Patrol inspection and maintenance of compressors:
1) By listening to sound, one can accurately determine the operation of the compressor. When the compressor is running, its sound should be uniform and rhythmic.

2) By touching it with your hands, you can determine the degree of heat generated and roughly determine whether the compressor is operating beyond the specified pressure and temperature.

3) Visual method: mainly observing the liquid level of refrigerant through a night vision mirror to see if there is a lack of refrigerant.

4) The method of measuring the amount is mainly to measure the current, suction and exhaust pressure, and suction and exhaust temperature during the operation of the compressor, which can accurately determine the operating condition of the compressor.

3. Patrol inspection and maintenance of condenser:
1) Check the fixing condition of the condenser and see if there are any signs of looseness in the fixing parts of the condenser to avoid damage to the refrigerant pipeline and outdoor unit. Check the insulation condition of the refrigerant pipeline for any damage.

2) Check the operation of the fan: mainly check the working condition of the bearings, base, motor, etc. of the fan, whether there is any abnormal vibration during the operation of the fan, and whether the fan blades are in the same plane when rotating.

3) Check if the condenser is dirty or blocked, and if there are any debris below that affects the smoothness of the air duct, thereby affecting the condensation effect of the condenser; Check if the fins of the condenser are damaged.

4) Check if the speed control switch is normal. Generally, the condenser of an air conditioner has two speed control switches, which are divided into temperature and pressure speed control. The new control technology now uses dual pressure speed control.

4. Inspection and maintenance of evaporator and expansion valve:
The maintenance of the evaporator and expansion valve mainly involves checking whether the evaporator coil is clean, whether there is frost phenomenon, and whether the drainage tray of the evaporator is unobstructed.

5. Inspection and maintenance of humidification system:
1) The humidification tanks of air conditioners are generally electrode type. If there is too much sediment and it is not washed in time, it is easy to scale on the electrodes, which will affect the service life of the humidification tanks.

2) Check if the operation of the water supply and drainage solenoid valves is normal.

3) Check if the drainage pipeline of the humidification tank is unobstructed, so that drainage and maintenance of the humidification tank can be carried out smoothly.

4) Check if the steam pipeline is unobstructed to ensure that the water vapor in the humidification system can humidify the computer equipment normally.

5) Check if the water leakage detector is working properly, which is an important part of the humidification system because if the drainage pipeline is not unobstructed

Carbon dioxide is non-toxic, but it cannot provide human respiration. This is a suffocating gas. According to the Indoor Air Quality Standards, the daily average carbon dioxide CO2 is 0.10% (0.10%=1000ppm). If there are many people in the room and the air is not circulating, the oxygen content in the air will be relatively reduced and a large amount of carbon dioxide will be produced. There may be varying degrees of poisoning symptoms indoors. For example, when the concentration is 0.07%~0.1%, it belongs to ordinary air. Some sensitive people may find it unpleasant to smell; When it is 0.1%~0.15% (1000ppm~1500ppm), it is the key air, indoor air begins to deteriorate, and the human body begins to feel uncomfortable; When it reaches 0.15%~0.2%, the pollution is relatively light, and above 0.2% is severe pollution; Between 0.3% and 0.4%, individuals experience deeper breathing and symptoms such as headaches, tinnitus, and increased blood pressure; When it reaches 0.8% or higher, it will lead to death.