Air purifiers are common electrical appliances in modern homes. In order to extend the service life of the purifier, it is necessary to install a cooling fan to help reduce the working temperature during operation. As the frequency and duration of use of the purifier increase, the wear of the internal cooling fan will also become more severe.

When choosing a cooling fan for an air purifier, we need to know that the straighter the blades of the cooling fan, the larger the wind section, and the greater the air volume. Moreover, the number of blades will also have a significant impact on the air volume and pressure. At the same rotational speed, selecting a more suitable fan blade shape and number of cooling fans can provide more air pressure and airflow, thereby bringing better heat dissipation effect.

The fan blades of cooling fans are generally made of plastic, and the specific temperature they can withstand depends on the type and quality of the material. Generally speaking, the temperature that plastic fan blades can withstand is below 70°C.

For unique high temperature occasions, unique high temperature resistant cooling fans can be selected. The cooling fan adopts high temperature resistant drive IC, motor copper wire, and wires to reduce the temperature rise of the motor itself without reducing the speed. Because of the use of these high temperature resistant parts, the requirements for the quality of the fan are also high. It is generally recommended to use a double ball bearing cooling fan, so that the quality is guaranteed.

The casing in the center of the wheel uses centrifugal force to propel the air forward into the open. A fan circulates air around an entire room, or space. A blower circulates the air only on the specific or pointed area. It is uses less pressure to produce large amounts of gas.

Noise: Because the blades are periodically subjected to the pulsating force of the uneven airflow at the outlet, noise is generated. On the other hand, due to the uneven distribution of pressure on the blade itself and the blade, the disturbance to the surrounding gas and parts during rotation will also constitute rotational noise. In addition, when the gas flows through the blade, the outer layer and the vortex are separated, which causes the pulsation of the pressure on the blade and generates vortex noise.

Abnormal sound: The abnormal sound is different. When the fan is running, if there are other sounds (with more than two kinds of sounds) in addition to the wind sound, it can be judged that the fan has abnormal sound. The cooling fan may collide due to foreign matter or deformation in the bearing, improper assembly, or uneven winding of the motor winding, resulting in loosening, which may produce abnormal noise.

The oil leakage of the cooling fan will increase the friction of the bearing, which will lead to an increase in temperature, an increase in the expansion coefficient, and a locked fan blade.

Long-term friction consumption of the bearing alloy will make the gap larger, cause jitter, and generate noise.

At present, there is no way to eliminate it, and the way to improve is to use turbine oil correctly.

However, refueling the cooling fan again can only serve as a relief. It is recommended to replace the cooling fan.

1. Bearing problems:

The oil bearing used by some cooling fans is porous. This kind of bearing has been used for a long time, and the lubricating oil in the bearing sleeve is easy to leak out, which will increase the noise, and will pollute and other accessories. The bearing is easy to wear out and has a short service life.

2. Lubricating oil problems:

The main reason for the oil leakage of the cooling fan is that the lubricating oil is added too much, resulting in overflow. In addition, if the lubricating oil used is too low, poor quality, and low viscosity, it is easy to throw oil when the fan is running.

3. Sealing problems

The cooling fan cover is usually sealed with a label to prevent oil spillage and leakage. Therefore, after removing the label and adding lubricating oil, the label is not pasted again, or the label is not sticky enough, which may lead to oil spillage and oil leakage of the cooling fan.