A blower is not a displacement compressor because it works without internal compression. When the compression chamber is in contact with the outlet duct, the compressed air is released from the compression part. When the volume of the pressure chamber is reduced by continuous rotations, the action of compression takes place. In this way, the compression takes place in opposition to the completely opposite pressure, and because of this, the efficiency of the compressor is reduced and a lot of noise is produced. Around the same shape, conventionally symmetric rotors, which rotate in opposite directions in the flat-ended housing, operate in the cylindrical housing. The rotors rotate simultaneously with each other by a synchronizing gear. Air blowers are usually non-lubricated. Low efficiency makes them only used in low-pressure, single-stage compression applications, even if two- or three-stage are available. Blowers are commonly used as vacuum pumps and pneumatic agents.

The blower consists of a wheel with small blades, which is intended to direct and control the flow of air to the center of the wheel and thereby expel it to the environment. The existing vanes move the air from the center, in other words, throw the air to the periphery and create suction in the wheel.

The impellers move in the blowers of centrifugal blowers. In other words, they throw air around and create suction in the wheel. The impeller blades in centrifugal blowers are of two types: curved forward and curved backward. In forward curvature, there are blades that are curved to the degree of rotation of the wheel and it is an impact device. This device accelerates air at a high speed. While the rotation is low compared to the rear blower.

Blower wheels work mostly at low speeds and are used to transfer large volumes of air against the correspondingly low pressure. The structure of the forward curved vanes is such that it cannot function at speeds that require high pressures.

Axial flow blower

Tube blowers, propeller blowers, axial blowers, and vane blowers are among the three basic types of axial blowers. The propeller blower has a propeller blade and an opening to limit the return of air from the outlet side. If this blower does not have an opening, it is not exactly a propellant blower because it cannot accurately move the air from one space to another. The apertures are basically made of a metal sheet to be precisely matched to the periphery of the engine.

In other words, axial tube blower is a propellant blower in a pipe. Here the tube is placed instead of the orifice. This blower increases the amount of flow and pressure by reducing the penetration of air at the tips of the blades. The axial vane blower has blades in the pipe that give the air flow outside. The air flow is changed from the rotary flow state caused by the propeller to the flow error, and also the pressure and efficiency increase while reducing the noise.

The propellant blower operates at a lower pressure. The pipe blower is relatively higher and the vane blower has an output pressure, meanwhile it supplies. Vane blowers are used when the space available to install the blower is limited.