Axial exhaust fan

The indoor microclimate is important for maintaining human health. It is impossible to create such a microclimate without ensuring constant circulation and ventilation of air.

Therefore, regular ventilation is part of the basic hygiene procedures. But it is not always possible to achieve a result using conventional ventilation. Ventilation systems come to the rescue, among which axial fans are widely used.

Description and application of axial fans

Axial fan - a simple device in which the rotation of the axis leads to vigorous rotation of the impeller blades mounted on the axis.

A mandatory part of the device is an electric motor. It is he who provides the movement of all parts of the device. The circulation of air occurs due to the fact that it moves with blades, the size of which can be different.

Axial ventilation systems are widely used:

  • Home appliances with blades of several tens of centimeters are used in apartments and small office rooms.
  • Industrial designs can have blades several cops long. They are installed in large areas (offices, restaurants, warehouses, etc.).

Types of axial fans (by appointment: wall, ceiling, roof, panel, floor, household, cabinet, exhaust, blowing), by the methods of operation.

Axial designs are convenient in that from the variety of existing types, you can choose the most convenient for installation and purpose.

The main types of exhaust ventilation systems include

  • Designed for installation in different places: in ventilation shafts on the wall (wall), ceiling (ceiling), roof (roof), on the floor (floor), on a window or ventilation hole in the wall (panel, with grille), placed inside various devices and mechanisms: computer, hair dryer, car engine, etc. (household). Providing reliable air circulation, these devices have some differences. So, floor systems can be used not only for ventilation, they successfully cool the room, and if necessary, heat it. Devices mounted on the roof have an additional smoke removal function.
  • Designed for different functions: providing a small circulation of air masses indoors (cabinet), removing odors and fumes (exhaust), used for thorough ventilation of the room (forcing).
  • Designed for operation in different conditions: conventional ventilation systems that perform the general functions of ventilation and air circulation; for work in places with special conditions (increased smoke, humidity, explosiveness).

Modifications of exhaust ventilation devices

Modern industry produces various modifications of ventilation systems, which differ in their characteristics.

Structural elements to which you should pay attention when choosing an axial view:

  • What bearings are used. It is recommended to choose devices with rolling bearings: they do not need to be lubricated, they are more durable than plain bearings.
  • Presence or absence of protection against increased humidity and engine overheating.
  • Material of blades and case (plastic - for household appliances, metal - for industrial structures).
  • The presence or absence of a check valve, on which the possibility of a reaction to the direction of air movement depends.

Advantages and disadvantages of axial fans

Axial devices are widespread due to their advantages. They are convenient and compact to install, reliable and easy to use, comfortable due to quiet operation, inexpensive and available for purchase.

Comparison of axial ventilation systems with centrifugal also indicates the advantages of axial fans:

  • Speed
  • Large volumes of pumped air;
  • Low pressure drop during circulation of air masses.

The disadvantage of these devices is their inability to create high air pressure.

Axial duct exhaust fans, their features and originality

Duct types are used for hoods in various rooms.

In household rooms, round-shaped devices made of plastic are usually used. Such devices are capable of processing up to 350 cubic meters in 1 hour with a minimum noise level.

For industrial premises, devices having a square or rectangular shape are suitable. Large volumes of processed air require greater strength of the mechanism, so the body of an industrial duct fan is made of metal.

If the design will be installed in rooms with high humidity, it is necessary to be especially attentive to the characteristics of the metal, giving preference to a material that is not susceptible to corrosion. The maximum power of industrial case fans is up to 17,000 cubic meters. in 1 hour.

Important!When purchasing a duct fan, it is useful to pay attention to how the bending of the blades is made. If their blades are bent forward, they let in more air, but the device makes more noise. The blades bent back work almost without noise, moreover, such devices are more economical in terms of energy consumption.

Axial window exhaust fans, their features and originality

It is easy to provide ventilation using an axial exhaust device, which is installed on the window. For its installation, you can directly select a window opening or window leaf.

Such fans are lightweight and compact. They have proven themselves well both in living rooms, where they are connected to electric networks with a voltage of 220 V, and when used in industrial needs. To do this, purchased devices operating at a voltage of 380 V.

Important!Window exhaust structures provide ventilation of the room, but with strong winds they will not allow cold air to enter the room. To do this, they are equipped with a check valve that closes the blades if the draft in the ventilation channel changes its direction.

Axial supply and exhaust fans, their features and originality

Two functions can be performed by axial supply and exhaust fans. They not only draw in dirty air and ensure its removal, but also fill the room with fresh air. This is due to the fact that the blades of the device can rotate in different directions.

Supply and exhaust fans operate with a sufficient supply of fresh air masses into the room. If such an inflow is weak and insufficient, the fan continues to work, its blades rotate, but it is not able to provide air circulation. Therefore, effective work is not possible in a room with a closed door.

Important!Supply and exhaust ventilation requires equipping plastic windows with special ventilation devices.

Axial fans are able to provide a healthy microclimate in domestic and industrial premises.

Watch the video: Centrifugal Fan vs Axial Fan (March 2024).

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