Damage to the impeller in the air conditioner is a fairly common reason for contacting service centers. You can find out about the malfunction by hearing a crack from the indoor or outdoor unit. You can buy an air conditioner impeller only at a service center. Since the shape and size of the blades of each manufacturer is unique.
About the outdoor fan
In the outdoor modules, axial fans with 3 to 6-blade impellers are installed. Air chases in only one direction. A fan is required to ensure air exchange on the heat exchanger.
Some manufacturers install reversible fans that allow you to change the direction of the air stream. The shape of the impeller in the air conditioner plays a big role in this case.
As a rule, it is made with three wide blades. Thus, noise is reduced, and the air flow remains as powerful.
Some manufacturers create special forms of blades, for example, proprietary development Panasonic - blades in the form of a wing of a gull.
The fan blades for the air conditioner are provided with grooves that reduce air resistance.
And this trick also makes the work quieter.
About the indoor fan
For internal modules, a tangential impeller is used. The air stream, passing through the fan wheel for the air conditioner, changes its direction.
From the edges of the blades, the air breaks off, forms a vortex movement - the cause of the hum and a decrease in efficiency.
Therefore, the shape of the impeller of the inner module is even more important.
Some manufacturers provide alternating movement of the blades, which reduces resonance, and hence the hum.
The best models differ in noise only 23 - 26 decibels.
Fans with wide impeller blades and lower rotational speed work quieter. To eliminate the pulsation of air flows, the installation of the blades is carried out at different angles with respect to the axis of movement.
Having bought an impeller of an air conditioner of another model, even suitable in size, a consumer may encounter increased noise and reduced operational characteristics of the equipment.
Damage to the impeller of the outdoor unit is often associated with work in the winter season. When a layer of ice freezes on the heat exchanger, about which the blades cling.
The fan blades of the indoor unit often break even during inept equipment installation.
