Cleaning of willow catkins in computer room air conditioning

Generally speaking, the refrigeration process of a dedicated air conditioner in a computer room is as follows: the compressor compresses the refrigerant gas that has absorbed heat energy after passing through the evaporator into high-pressure gas, and then sends it to the condenser of the outdoor unit; The condenser releases the heat energy of high-temperature and high-pressure gases into the surrounding air through a fan, causing the high-temperature and high-pressure gas refrigerant to re condense into a liquid, which is then sent to the expansion valve; The expansion valve cools the liquid refrigerant sent from the condenser pipeline into a mixture of liquid and gas, and then sends it to the evaporator circuit; The evaporator re evaporates the mixed refrigerant of liquid and gas into gaseous refrigerant by absorbing the heat in the machine room environment, and then sends it back to the compressor, repeating the previous process.

computer room air conditioning

From the process of air conditioning heat dissipation in the computer room, it can be seen that the fan of the outdoor unit plays a crucial role in the entire heat dissipation process. It should be noted that the outdoor unit of the air conditioner is installed outdoors, and in the current season, “floating clouds and willow catkins have no roots, and the sky and earth are vast and far away, flying with the wind.” The beautiful poetry of the air conditioner in the computer room probably has lost its poetic sentiment. When a large amount of willow catkins are adsorbed on the surface of the heat sink on a large area during the operation of the outdoor unit, it will cause poor heat exchange of the outdoor unit, and then cause a high pressure alarm of the indoor unit.

So in the season when willow catkins are everywhere, it is necessary to regularly clean the outdoor unit’s heat sink to avoid its dirt and blockage. The cleaning method can be done by using a high-pressure water gun, air pump, or soft water pipe to flush in the direction of the heat sink (opposite to the outdoor unit fan) to restore the outdoor unit’s performance. In spring, when there is a lot of willow catkins or severe sandstorm weather, it can be done regularly according to the degree of dust accumulation in the outdoor unit, and it should be rinsed at least once every three months.

The fins of the fresh air fan also have the trouble of adsorbing willow catkins

There are a large number of IT equipment in the computer room, and the emission of carbon dioxide affects the physical health of the computer room staff. Due to the requirements for dust prevention in the computer room, it is necessary to prevent external air from entering. During the operation of the equipment in the computer room, various gases produced by the equipment and operators cannot be exchanged with the external air in a timely manner, resulting in a decrease in air quality and discomfort for the operators. This requires consideration of the supply of fresh air. To ensure that the air in the computer room is always under positive pressure, fresh air must be pressurized before being sent into the room. At the same time, in order to avoid outdoor heat load and unclean air from entering, which may affect the constant temperature and humidity environment of the computer room, the fresh air fan must have the ability to handle air, refrigeration, and dust filtration.

The filter is the main path for filtering dust in the fresh air fan. If the fresh air enters the surface cooler without filtering, or if the filter is damaged, the willow catkins will attach to the fins. If the fins are blocked, the fresh air fan will lose its function. So it is necessary to mention that in computer rooms using fresh air systems, attention should also be paid to cleaning the fins of the fresh air fan. In fact, whether it is the fins of the surface cooler or evaporator, they are places where dust accumulates and should be cleaned regularly.

The cleaning method is to spray the surface of fins with dust remover after shutdown (generally available in professional refrigeration stores, and the price is very cheap). After a large amount of foam appears, it can be repeatedly washed with clean water. If conditions permit, it can be washed with high-pressure water gun. After cleaning, it is better to spray some medical disinfectant (non corrosive). Here, it should be noted that dirty water should not flow into the system air duct during cleaning.

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