Causes of refrigerant leakage and flooding in the air conditioner of the computer room and the treatment methods!
Refrigerant leakage of computer room air conditioners is common, and water leakage of computer room air conditioners often occurs. In fact, there are many reasons for computer room air conditioners. Existing problems will cause computer room air conditioner refrigerant leakage and water leakage.
Reason 1: Use problem
In terms of use, one is ‘dirty blocking’, that is, dust that has not been cleaned in time accumulates in the plastic pipe, causing poor drainage. The second is that the drain pipe is moved or knotted. Third, the drain pipe that has been used for a long time is cracked due to the aging of the plastic.
Reason 2: Installation problem
In terms of installation, when installing an air conditioner that is inclined, that is, if the level is unqualified, it will leak due to moisture accumulation. The wall hole punched during installation is too high, causing the drain pipe to lead out to a higher position, causing the drain pipe to drain unsmoothly, making the water receiving pan of the indoor unit overflow with water, and the indoor unit will also leak water.
About the leaking problem of indoor unit:
Treatment method: The installation drainage angle is poorly handled. The bend of the drainage pipe cannot be less than or close to 90 degrees, nor too many bends. The drainage pipe is made of PVC pipe material; the embedded internal unit is not installed horizontally, adjust the level of the indoor unit.
Regarding the problem of the air conditioning drain pipe in the computer room:
A. The inclination angle of the drain pipe on the indoor unit side (wall-mounted, cabinet type) is too small. Treatment method: readjust the angle of the drain pipe.
B. The drain pipe is too long and the water flow is not smooth. Treatment method: try to shorten the length of the drain pipe.
C, the drain pipe is uneven and twisted. Treatment method: rearrange the drain pipe.
D, the drain pipe (hose) is squeezed. Treatment method: arrange the squeezed part of the drain pipe (hose).
E, the drain pipe is broken or cracked. Treatment method: replace the drain pipe.
F. Insert the water outlet of the drain pipe into the water. Treatment method: Take out the drain pipe inserted into the water.
G, the drain pipe joint is loose. Solution: Reconnect the connector.
H, the drain pipe is dirty with foreign matter. Treatment method: the drain pipe is dirty and blocked by foreign matter.
Flood warning linkage shutdown processing method:
If the air conditioner in the computer room runs for a long time, the refrigerant pressure will be abnormal, which will cause the evaporator to freeze and the drainage pipe to be blocked. Especially in the rainy season, the air humidity increases and a large amount of condensation drips on the ground. If this situation occurs, if it cannot be dealt with in time, It will affect the operation of equipment. In addition, ground water will endanger other equipment and cause safety hazards.
At present, the computer rooms are unattended, and the air-conditioning leakage monitoring depends on the flooding probe of the power environment monitoring system. When a water leak occurs, even if the water immersion probe collects this fault, it can only be notified to the maintenance personnel through work orders or IVR calls after being uploaded to the network management system. The air conditioner cannot be turned off in the first time. The maintenance personnel will Continue to leak.
Add a water immersion probe to the place where the internal unit of the air conditioner is prone to water leakage (such as the evaporator tray, the drain pipe, etc.) to expand the range of collection and early warning. At the front of the air conditioner power supply, an AC contact controller, two intermediate relays and spring reset are installed The switch constitutes a secondary control loop, and is connected with the monitoring acquisition board through a data line. The opening and closing instructions for linkage control of the auxiliary contacts of the intermediate relay are set in the monitoring system back-end command software database, and the power supply and signal are doubled with the monitoring system. China Unicom, when the computer room air conditioner has a flooding warning, it will automatically shut down the machine immediately to minimize the amount of water dripping, so as to buy more time for maintenance personnel to rush to the scene to deal with it. Up to now, the program has been piloted in some computer rooms and has been repeatedly verified, with a success rate of 100%. The successful practice of this project makes the air conditioner flood warning mechanism in the original dynamic environment monitoring system more intelligent and automated, greatly reducing the scope and harm of water leakage.
Treatment method when flooding occurs in the computer room:
Block the leaking source first, turn off the central air-conditioning unit according to the water inlet situation, and pull down the main power switch. If the water leak is large, you should immediately notify the equipment manager, and try your best to stop the water inlet. After the leaking source is blocked, drain immediately ; After the water is drained, the wet water equipment and facilities should be dehumidified immediately, such as wiping with a dry clean cloth, drying with hot air, natural ventilation or replacing related pipelines, etc., confirming that the wet water has been eliminated and the insulation resistance meets the requirements , Start trial operation, if there is no abnormal situation, it can be put into normal operation.
For the reason of water leakage, remind engineers to observe whether the machine is level and whether the wall hole is higher than the machine during the installation of the air conditioner in the computer room. In the process of use, the filter should be cleaned frequently to avoid water leakage and improve the cooling efficiency. The drain pipe should not be moved or knotted. There are different remedies for leaks of different reasons. "If the drain pipe is broken, you only need to replace the drain pipe at a very small cost. If it is'dirty', clean the blocked section of the drain pipe."
About the evaporator problem:
The evaporator in the air conditioner of the computer room freezes, causing water leakage when the ice is melted. There are three treatment methods:
1. The system lacks fluoride, so add fluoride.
2. Cleaning the air duct system.
3. If the wind speed is abnormal, adjust the wind speed to normal.
About the indoor connecting pipe problem:
There are condensation water droplets on the outside of the insulation layer of the connecting pipe on the indoor side of the air conditioner, forming dripping water. There are three treatment methods:
1. Poor insulation material (the foaming density of the sponge is not enough, the material is too thin), thicken the insulation layer or replace the insulation material.
2. The set temperature is too low and the wind speed is too low, which reduces the heat exchange capacity of the indoor unit. The temperature of the return pipe is too low, the indoor temperature is high, and the humidity is large. Can be improved.
3. The surface of the drain pipe is too cold to cause condensate, so an insulation layer can be added.
How to deal with refrigerant leakage in computer room air conditioner:
Immediately shut down the central air-conditioning host, close the relevant valves, strengthen on-site ventilation or spray water from the water pipe (be careful not to spill on the equipment). To ensure safety, rescue personnel should work in pairs and wear protective clothing. Wear a gas mask to enter the scene, and adopt different methods for poisoned persons in different situations: For those with headache, vomiting, dizziness, tinnitus, and rapid pulse and breathing, they should immediately move to a well-ventilated place to rest, such as convulsions and unconsciousness If you are in a comatose state, you should immediately move to a place with fresh air for artificial respiration and send to the hospital for treatment. If Freon refrigerant splashes into your eyes, use 2% boric acid and sterile saline to wash your eyes repeatedly and send to the hospital for treatment. After the leak source, start the central air commissioning operation, and confirm that there is no leak before the unit can be put into normal operation.
