Axial exhaust fan

The indoor microclimate is important for maintaining human health. Without ensuring constant air circulation and ventilation, it is impossible to create such a microclimate.

Therefore, regular ventilation is included in the complex of basic hygiene procedures. But it is not always possible to achieve results with 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.

An essential component of the device is an electric motor. It is he who ensures the movement of all parts of the device. Air circulation occurs due to the fact that it moves by blades, the size of which can be different.

Axial ventilation systems are widely used:

• Household devices with blades of several tens of centimeters are used in apartments and small office spaces.
• Industrial structures can have blades several meters long. They are installed in large premises (offices, restaurants, warehouses, etc.).

Types of axial fans (by purpose: wall, ceiling, roof, panel, floor, household, cabinet, exhaust, blower), by method of operation.

Axial structures are convenient because 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), located inside various devices and mechanisms: computer, hair dryer, car engine, etc. (household). While providing reliable air circulation, these devices have some differences. Thus, floor systems can be used not only for ventilation; they successfully cool the room and, if necessary, heat it. Roof-mounted units have an additional smoke removal function.
• Designed for different functions: ensuring a small circulation of air masses indoors (cabinet), removing odors and fumes (exhaust), used for thorough ventilation of the room (pressure).
• Designed for operation in different conditions: conventional ventilation systems that perform general functions of ventilation and air circulation; for work in places with special conditions (increased smoke, humidity, explosion hazard).

Modifications of exhaust ventilation devices

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

Design elements to consider 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.
• The presence or absence of protection against high humidity and engine overheating.
• Material of blades and housing (plastic - for household appliances, metal - for industrial structures).
• The presence or absence of a check valve, which determines the ability to react to the direction of air movement.

Advantages and disadvantages of axial fans

Axial devices have become 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.

A comparison of axial ventilation systems with centrifugal ones also shows the advantages of axial fans:

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

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.

Devices that have a square or rectangular shape are suitable for industrial premises.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 structure will be installed in rooms with high humidity, you must 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 blades are bent. If their blades are curved forward, they allow more air to pass through, but the device produces more noise. Back-curved blades operate almost silently, and such devices are more economical in terms of energy consumption.

Axial window exhaust fans, their features and originality

Ventilation can be easily ensured using an axial exhaust device that is installed on the window. To install it, you can choose a window opening or window directly.

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

Important! Window exhaust systems provide ventilation of the room, but in 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

Axial supply and exhaust fans can perform two functions at once. They not only draw in dirty air and ensure its removal, but also fill the room with fresh air. This is ensured by the fact that the blades of the device can rotate in different directions.

Supply and exhaust fans operate when there is sufficient supply of fresh air masses into the room. If such inflow is weak and insufficient, the fan continues to work, its blades rotate, but it is not able to circulate air. Therefore, efficient work is impossible in a room with a closed door.

Important! Supply and exhaust ventilation requires that plastic windows be equipped with special ventilation devices.

Axial fans are capable of providing a healthy microclimate in domestic and industrial premises.