[Evaporative cooling fan] How to use evaporative cooling fan principle
How to use evaporative cooling fan
When the evaporative cooling fan is used for cooling, the magnitude of the cooling is mainly related to the relative humidity of the local air. The lower the relative humidity, the greater the temperature drop. For low-humidity areas like Xinjiang, the temperature drop can reach 20°C. For high-humidity areas like Guangdong, the cooling rate may be only 2°C. So when choosing to buy a cooling fan, the first thing to consider is the area you use to see if your local climate can meet your cooling needs.
Since the evaporative cooling fan will increase the humidity of the air while cooling, in order not to increase the humidity of the air greatly, the evaporative cooling fan is generally used. In an outdoor open environment or a room with doors and windows open. At this time, when selecting the specifications of the cooling fan, it is mainly determined by the range that the cold air can reach. It mainly depends on personal feelings, and there is no uniform standard. But generally every 200m3/h of air volume can cover the range of 1 m3.
For a window-mounted cooling fan or a larger air conditioner that sends cold air through a wall vent, it can be fully used as an air conditioner when it has good exhaust vents. At this time, when selecting the specifications of the cooling fan, first calculate the cooling load of the room according to the air conditioner, and then calculate the cooling capacity of the cooling fan under the local climatic conditions to see if the cooling capacity of the cooling fan can meet the cooling load of the room. Require. Such computational science is accurate, but it requires professional and technical personnel, and it is difficult for non-professionals to master it. For non-professionals, the estimation method is mainly used. The general selection principle is: 150m3/m2*h for residential buildings, 250m3/m2*h for office buildings, 170m3/m2*h for public buildings, and 300m3/m2*h for general industrial plants. However, when using the estimation method, it should be noted that the above principles are only for ordinary buildings. When the building is high in height, the maintenance structure is poorly insulated, the sun is severe in the west, the room is on the top floor, there are many indoor people, the heat generation is large, and the local climate and humidity are high, etc., the air volume required per unit area will increase accordingly.
For the traditional air-conditioned room, it generally reduces the humidity of the indoor air while cooling down. When people are in such an environment for a long time, the air will be dry and uncomfortable. Since evaporative cooling fans increase the humidity of the air while cooling, a good way to use evaporative cooling fans is to use evaporative cooling fans in traditionally air-conditioned rooms. At this time, not only can the humidity of indoor air be kept within a comfortable range, but also the energy consumed by traditional air conditioners can be greatly saved, which can be said to kill two birds with one stone. In this case, the specifications of the cooling fan are generally selected according to the standard of 75m3/m2*h.
When the evaporative cooling fan is actually used, if the room window can be opened, the window needs to be opened. However, if all the windows are fully opened, the indoor temperature will not be lowered. Generally, the opening area accounts for 4~5% of the wall area. At the same time, the opening of the windows should be avoided as much as possible to avoid opening on the same wall or the distance between the windows is too small, resulting in a “short circuit” of airflow and a “dead zone” of airflow in the indoor space.
The evaporative cooling fan should pay attention to the wetness of the wet pad during use. Once it is found that the wet pad cannot be completely wetted, you should contact the relevant departments or personnel for maintenance. For models that can be started separately from the fan and the water pump, the water pump should be turned on first, and the fan should be turned on after 3 to 5 minutes; when the machine is turned off, the water pump should be turned off first, the wind speed should be adjusted to a high level, and the wet curtain should be dried by the fan. After 5 minutes Then turn off the fan and cut off the power.
In order to prevent the impurities in the water from forming scale and blockage on the wet curtain, attention should be paid to water quality control to prevent the impurity content of the circulating water from being too high, try to use purer water sources, and drain the remaining water after daily operation , replenish clean water before running the next day; filter the water or increase the number of cleanings when conditions permit; if you find that the air supply has peculiar smell after a period of use, you should immediately contact relevant professionals for inspection, and replace the evaporation core or Strainer.
During long-term use, the water tank, water tank, air filter, wet curtain evaporator, anti-static filter, etc. should preferably be cleaned every two weeks to prevent clogging caused by dirt, dust, minerals, etc.; When not in use for a long time or when the season is changed, you should also clean the water tank, water tank, air filter, wet curtain evaporator, and anti-static filter, wipe the casing of the machine with clean water (or add a small amount of detergent), and then turn off the water pump Turn on the power supply, turn on the fan, dry the wet curtain to prevent the growth of mold, and then put it in the box; before starting to use in the cooling season, check whether the wet curtain and air filter have mold, insects or blockage, and whether there is peculiar smell , Whether the water channel (water pump, water distribution pipe, water distribution hole, etc.) is unblocked, whether there is dust in the air channel (fan, air outlet, etc.), whether the power wiring is in good condition, replace the parts that need to be replaced, and clean those that need to be cleaned.
Under normal circumstances, the service life of the wet curtain core can reach 5 to 10 years. For areas with high alkaline water quality, the wet pad is prone to scaling and failure, and attention should be paid to replacing the wet pad. Generally speaking, when the scale of wet curtain reaches 1/3 of the area visible to the naked eye, it should be replaced to ensure the operation effect.
Principle of Evaporative Cooling Fan
Evaporative cooling fan uses the physical properties of “water evaporation to absorb heat” to make Air cooling fan. It sends the water to the water distributor through the water pump, the water evenly falls on the wet pad from the water distributor, forms a water film on the fiber surface of the wet pad, and then sends the air out through the fan to generate negative pressure in the machine, and the air After passing through the wet curtain soaked in water, it is fully contacted with water, and the sensible heat in the air is absorbed, so as to achieve the purpose of cooling.
The evaporative cooling fan has the following characteristics:
1. Healthy filtration (full filtration—–health concept)
Air filtration: filter screen—–healthy washing filter element—–air duct/wind wheel sterilization and bacteriostasis—–air outlet;
Water filtration: antibacterial water tank— –filter screen—–water pipe purification—–bacteriostatic water circulation system;
Antibacterial factor: unique MD T-Znow antibacterial factor (four needle-shaped oxidized whiskers), efficient antibacterial Healthier;
Healthy negative ions: fresh air.
2. Clean and healthy washing filter element
Add MD T-Znow antibacterial factor (four needle-shaped oxidized whiskers), which has the functions of sterilization, antibacterial and antibacterial;
Features of filter element —- cleanable (soaking, washing and other cleaning methods), long life, no peculiar smell, sterilization.
3. Motor—–quiet, long life and other selling points.
4. A new generation of Chiba wind wheel —- larger air volume and lower noise.
