Industrial exhaust fan - purpose, principle of operation, types

Ventilation - forced air exchange in a room in order to create favorable conditions for humans. The industrial exhaust fan is designed to remove exhaust air outside the premises through special air ducts. It is appropriate for industrial facilities, warehouses, supermarkets, food processing plants, agricultural facilities, offices and cottages with a powerful ventilation system.

What is it for

An industrial exhaust fan is one of the elements of the climate system. It is suitable for supply, exhaust and supply and exhaust lines. The equipment can operate in one of two modes:

forcing or pulling the air flow, depending on which direction the blades are directed. The performance and efficiency of the system as a whole will depend on the correct calculation of performance and selection of the type of device.

Important! The industrial fan must remove from the workshop gases, vapors and toxic substances hazardous to humans, arising during production processes.

Tasks of industrial ventilation equipment

An industrial fan is installed in industrial facilities to improve the efficiency of air exchange. It is much more powerful than its domestic counterpart, therefore it is suitable for ventilation of large rooms. A wide range of types of coolers and configurations allows you to choose equipment for ventilation systems of any complexity. Industrial models are designed to solve the following problems:

• local removal of metal and wood shavings, dust from the working surface of machine tools;
• flue gas removal, steam injection into the boiler room;
• local removal of dust and slag during welding;
• dusty air intake during production processes with increased dust formation;
• general air exchange in a large area in accordance with sanitary standards;
• transportation of grain by air, including the removal of waste from its processing.

What parts do industrial duct fans for ventilation consist of?

The main structural elements of the fan include the housing and the electric motor, which starts the turbine, which consists of many blades (impeller). They have low aerodynamic drag.

The flow rate and efficiency depend on the power of the electric motor. Exhaust smoke exhaust coolers are introduced as an additional component of the climate system. They are subject to increased requirements for performance and reliability.

How does an industrial exhaust fan work?

The fan power is determined by the rotational speed of the impeller. The blade size ranges from several tens of centimeters to several meters, depending on the type of equipment. The turbine is made of high quality plastic, stainless steel or aluminum alloys. It is light enough, therefore, does not require large energy consumption for rotation.

Most industrial device models do not exceed 800 watts. The units are connected to a 220 V power supply or from a three-phase network, depending on the type of cooler.

Industrial exhaust fan classification

Industrial fans are distinguished by the type of attachment and equipment design. Models available for local cleaning of workplaces and general conditioning. Exhaust models are appropriate for a supply and exhaust system, since they provide air inflow and outflow, they differ in the type of fastening.

By type of attachment

Window models are introduced into a window opening or a window. They are low-noise, lightweight and lightweight. A check valve is installed on the outside of the cooler to prevent air from being blown into the room. Industrial appliances are connected to a three-phase network.

Floor-standing appliances belong to large-sized units on casters. The fan can be easily moved around the territory. The unit does not require a fixed connection to the air duct. The tilt is adjustable using the handles.

Duct fans are suitable for ventilation and air conditioning systems with round, square or rectangular ducts. They are installed directly inside the exhaust duct.

Ceiling coolers are suitable for buildings with high ceilings. They are introduced into air conditioning systems to even out the air temperature. They are compact, low-noise, do not violate the design of the room.

By equipment design

Axial draft models are a wheel in a cylinder that rotates. These devices are sold in standard sizes or made to order for any ventilation system. Coolers are used in many fields of activity. They are introduced into the ventilation duct quite simply and do not require frequent preventive maintenance.

Radial models are characterized by increased performance. They are designed to remove flue gases and toxic substances. These include devices of the "snail" type. During the rotation of the turbine, the air flow enters the rotor. Gradually rotating inside the case, it comes out of the device. In this case, the air stream is cleaned from impurities.

What are radial exhaust fans (industrial) for?

Radial fans are capable of moving a large volume of air masses. They got their name due to the arrangement of spiral blades. The impellers are bent forward or backward. The movement of air in the housing is due to the centrifugal force, which is created inside the rotor with the help of working blades. Distinguish between roof and duct models. The ventilation rate is controlled by varying the voltage supplied to the electric motor. The range includes high and low pressure devices.

Roof fans are installed outside the premises, so they do not violate the integrity of the interior, save the internal space in the room. They are mainly used for smoke extraction. A visor on the cooler prevents water from entering the case. Channel models are represented by classic "snail" coolers, centrifugal and dust models.

What should you know before installing an exhaust fan in an industrial building?

The fan is selected in accordance with the type of ventilation - for injection, exhaust or combined action, as well as the diameter, configuration and location of the ventilation duct. When choosing a specific model, you must consider:

• area and volume of the premises, its architectural features;
• number of air ducts, their configuration, temperature regime;
• the length of time during which he must work;
• the number of working personnel, the workload of the workshop and the location of workplaces;
• features of equipment operation that affect air quality and microclimate.

Important! When calculating the need for fresh air, an inflow of clean air in an amount of at least 20-30 m is taken into account²/ h for 1 person.

It is recommended to install filters in the ventilation ducts, which allow less frequent preventive cleaning of the air duct. Direct or electrically operated dampers are required to shut off parts of the duct to restrict airflow backflow. For heating the air masses, heaters are additionally provided.

Popular companies producing industrial exhaust fans for business

The range includes fans of domestic and foreign production. The models differ in the presence of various additional options, therefore they are perfectly integrated into air conditioning systems. The Shuft trademark offers window and axial coolers that are quiet in operation and easy to install. The manufacturer occupies a leading position in the production of industrial models.

The Mess range is distinguished by a robust metal housing made of high quality steel, low noise. The TYWENT brand represents a wide range of industrial and domestic fans of various types. Manufacturers "SAMA" and "SAVIO" offer roof models, high pressure washers, blower coolers, radial fans. The Dospel line - household and industrial appliances, including overhead models.