Dust extraction fan. Dust fans

To ensure forced air extraction from the room, different kinds fans. They are used when it is necessary to get rid of excessive moisture, unpleasant odors, or simply create the desired microclimate. Silent duct exhaust fans are installed directly into the duct and are effective for use in a bathroom, toilet or kitchen.

Different device models can differ significantly from each other in a number of characteristics. For example, these may be differences in the shape of the body:

1. - mounted in ventilation ducts round shapeare the most common option for use in the kitchen or bathroom.
2. Rectangular duct fans - installed in ventilation shafts with rectangular or square cross-section. As a rule, industrial fans are rectangular in shape, which are characterized by increased operating power.
3. Square - as well as rectangular exhaust axial fans, they are designed for installation in a square duct shaft and are characterized by high operating power. They are also often used for industrial purposes.

Duct devices for air extraction are distinguished by design features.

Axial - have a body in the form of a cylinder, inside which there is a fan with blades mounted on the axis of the electric motor. With this design, air masses move along the axis of the device, and a special collector is often installed at the inlet, which improves the aerodynamic characteristics of the device. Among the advantages of axial fans for extraction, a rather high efficiency can be distinguished - over 100 m³ of air per hour.

In addition, axial models are characterized by ease of installation, therefore they are often installed in the ventilation openings of bathrooms or kitchens. The disadvantages include low pressure characteristics and high level noise - about 30-50 dB.

Radial - have a spiral casing, inside which there is a blade wheel. When it rotates, air masses move in the radial direction, the air is compressed by centrifugal force and leaves the housing. The blades of the radial device can be directed backward or forward, in the first case, during operation, saving up to 20% of electricity, and the noise of the device is significantly reduced. The forward curved blades increase the fan power. Radial models are compact in size, so they can be easily installed in almost any duct.

Centrifugal - relatively new model, which has already gained great popularity among users. Exhaust centrifugal fans are well suited for installation in rooms larger than 15 m², are characterized by high power and almost silent operation. The advantage of a centrifugal fan is that it can be installed not only in front of the air intake, but also in the middle of the ventilation shaft.

Helpful advice! If you prefer a centrifugal fan, then it is better to install it directly in the ventilation shaft, so its efficiency will be much higher, and condensate will not accumulate on the device and dust will not settle.

There are also specialized models such as smoke exhaust fans and explosion-proof fans. Axial smoke exhaust fans are designed to move air masses, in which there is a certain amount of impurities. it a good option not only for industrial premisesbut also for kitchens where large quantities of food are often prepared. In addition, these models of hoods are very powerful and allow as soon as possible extract steam and smoke from the room.

The explosion-proof axial fan is designed primarily for the organization of forced air extraction with flammable or explosive impurities. Such models are rarely used in everyday life, but they are very popular in enterprises where there is increased risk fire or explosives are being handled.

What parameters you need to pay attention to before buying a fan for the hood

Before purchasing an exhaust device that will ensure the forced movement of air masses in the bathroom, toilet or kitchen, you should pay attention to its following parameters.

Fan performance. This parameter is calculated using a fairly simple formula. To do this, you need to multiply the volume of the room by the rate of air exchange. The last indicator means the number of air changes per hour. The multiplicity directly depends on the type of room and is 6 for a bathroom, which is used by up to 3 people, 8 - more than three and up to 10 - for a toilet.

At the same time, when choosing a silent fan for the hood, always take a product with slightly inflated rates. For example, the performance of an appliance installed in a bathroom should be 95-100 m³ / h.

The amount of noise generated by the instrument during operation. Anyone always makes mechanical and aerodynamic noise. The first is the noise from the operation of the electric motor, created by its vibration, which is transmitted to the air duct, the second is the noise from the movement of air masses. Silent duct fans are models whose operating noise does not exceed 25 dB. An indicator exceeding the threshold of 35 dB is already noticeably annoying, so you should not install a device with such characteristics in a living room.

A silent duct fan can be made even quieter by installing a special muffler immediately behind the casing, as well as finishing the ventilation shaft with a material with high sound-insulating characteristics.

Construction safety. This refers to the level of protection against moisture and dust. This is especially true if you purchase a duct fan for rectangular duct to the bathroom or kitchen, where high humidity inevitably forms. If moisture gets inside the case, it can cause a short circuit, so it is better to immediately purchase models with protection against water. In addition, the purchase of a device operating at a low voltage of 24 V.

The functionality of the hood. This refers to the fan operating mode - automatic or standard. Standard axial supply fans turn on at the same time as the room light is turned on and are well suited for rooms where the humidity level is not too high. Otherwise, the device simply will not cope with air extraction. The automatic range hood is equipped with a timer that switches the appliance on and off.

In addition, the design of the automatic fan can include a humidity sensor, which is very convenient for the bathroom. The price of an axial exhaust fan will be higher than the standard one, however, such improvements will allow you to more efficiently and quickly get rid of excess moisture in the room.

The quality of the device. If you need a really high quality exhaust fan, then you should pay attention to ensure that it matches international standards... For example, the minimum acceptable protection class of the device is IP 34.

Choosing a device for the hood, give preference to models that have already established themselves on the market and are popular among buyers.

Choosing a fan for a cooker hood

The appliance installed in the kitchen differs slightly in its characteristics from the fan, which is suitable for installation in the bathroom. The main difference is that the kitchen is the source of odors. Therefore, if you do not want odors from the neighboring apartment to penetrate into the kitchen, it is recommended to install a model with a non-return valve. This design will prevent air from entering the room when the hood is off.

Also, when buying an exhaust fan for the kitchen, pay attention to the fact that it can withstand high temperatures and high humidity. This is especially true if you mount the device in the immediate vicinity of kitchen stove... The cooker hood can be controlled using a remote control, a special cord, and it is also possible to turn it on simultaneously with the lighting. The most convenient option is to choose the remote option. You can also purchase a model with a built-in presence sensor, which will be triggered when you enter the room.

Related article:

Types and features. Selection parameters, types of industrial models. Features of installation. Review of popular manufacturers.

Instead of a duct supply and exhaust axial fan for the kitchen, a type of hood such as a window hood can also be used. Household window exhaust fan differs from other models in that it is built into the window structure or even embedded directly into the glass. The disadvantage of this option is drafts in the room, if a check valve is not provided in its design. Today, window fans are not very popular, yielding positions to more convenient duct models.

Price of 100 mm silent duct fans and other models

The cost of an air extraction device depends on many factors, for example, its size, power, performance, and the material from which the body is made. Thus, devices in a steel case are several times more expensive than in a plastic one. On average, the price of a household fan in a plastic case for a hood in a bathroom, kitchen or toilet starts from 1000 rubles. More sophisticated models designed for operation at high and low temperatures, for high pressure and other extreme conditions, can cost 2000-3000 rubles and more.

Exhaust fans with non-return valve and others additional functions also more expensive than standard models.

Installation of a silent household exhaust fan

Before proceeding with the installation of the device, it is imperative to check the performance of the ventilation system in the room. To do this, you need to bring a lighted match or attach a sheet of paper to the ventilation hole. In the first case, the flame should deflect towards the hood, and in the second, the sheet should be held on the hole by the air flow. If this does not happen, then you definitely need an exhaust fan, since air will not be removed from the room naturally.

After that, you should decide on the place where the axial fan will be installed for exhaust ventilation or another model. It is best to mount the unit under the ceiling, as it is hot and wet air always goes up.

Helpful advice! The choice of the type of fan is also based on the place of installation. Not every model is suitable for installation, for example, in a horizontal position or at an angle.

When installing the device, the following points should be taken into account:

• it is best to start installing the fan during the repair process;
• the wiring that goes from the power source to the hood should be hidden in a special box or generally carried out under plaster;
• if we are talking about a fan in the toilet, then it is most convenient to connect it directly to a light switch;
• if you want to reduce the level of vibrations, as well as protect the supply and exhaust fan from external influences, then you can mount the device in plastic pipepre-fixed in the ventilation opening with cement, polyurethane foam or construction sealant;

• in the toilet, the fan will be most efficient if it is installed under the ceiling directly above the toilet;
• for error-free connection of the device to the mains, you should first familiarize yourself with the instructions attached to it.

The connection of an axial supply and exhaust fan is very simple:

1. The protective cover is removed from the body of the device.
2. A special adhesive mixture is applied to the fan.
3. The device is installed in the place prepared for it, pressed tightly for several minutes.
4. The protective cover is screwed into place.

Remember that the device must adhere as tightly as possible to the walls of the duct, otherwise, during operation, it will beat against them, which will lead not only to increased level noise, but also to the premature failure of the device and the need for repair or replacement.

It is also very important to choose a model that will fit as much as possible in size to the diameter. ventilation duct... For example, if it is 10 cm, then you need a 100 mm duct fan model.

Silent duct exhaust fans: care features

In order for the hood to serve as long as possible, certain operating rules should be observed and carried out regularly preventive examination and cleaning the appliance. Most often it is necessary to remove dust and dirt ventilation grill and fan blades. In addition, when installing a silent duct fan of 125 mm or another model, it is necessary to check the duct for tightness of the joints. It is in the crevices that dirt most often accumulates, fatty deposits form, and bacteria, fungus and mold multiply.

Duct blockages can be removed mechanically or chemically. In the first case, special brushes or simply pieces of fabric are used, in the second - cleaning agents. In especially severe cases, it is recommended to remove the fan, completely disassemble it, thoroughly cleaning all parts. Also for more efficient and reliable work filters should be changed regularly, if the design allows it. It does not matter whether it is a VO 06 300 axial fan or another model, systematic cleaning is necessary in any case.

Helpful advice! In order for you to have to carry out major cleaning of the device less often, install a fine mesh on the inlet of the air duct. This will keep the fan blades from getting dust and dirt particles.

The organization of the forced movement of air masses from the room is very important if there is high humidity in the room or unpleasant odors... It is highly recommended to install a duct fan in the bathroom, toilet and kitchen. The type of device is selected based on a number of characteristics discussed above.

The problem of removing unpleasant odors is faced by many residents of megacities. It is especially relevant in old houses with natural channels. As part of today's review, we will consider silent duct fans for hoods, analyze their types and advantages / disadvantages. Along the way, we will deal with those technical characteristics that you should definitely pay attention to, and tell you how to properly install such a fan and, if necessary, repair it. And we will conclude our story with a review. best models duct fans.

In the phrase of the name of the subsection there are two terms that need to be parsed. These are "duct" and "exhaust". With the second, everything is easier. That is, the device must be installed on the exhaust section of the ventilation system. To make it clear what in question, we explain that ventilation works on the principle of removing air masses and the same amount of inflow. One does not exist without the other.

The fans can be installed on or on the exhaust. Exhaust models are most often used. By the way, these devices include roof fans or centrifugal "snails" installed outdoors.

The channel unit is a completely different design from them. It is cylindrical in shape with a fan mounted inside. That is, the device itself can become a continuation of the air duct of the ventilation system or can be installed in the body of the wall, or rather, in a through hole made in the wall. More often, such models are called air, but no matter how they call it, the essence remains the same - air extraction using a fan.

Why is a silent fan better for the hood?

Now let's see why such fans are called silent. Any equipment that contains rotating parts emits certain sounds associated with vibration. Fans have another reason to make noise - this is the flow of air that passes through interior space device.

Attention! According to SNiP 23-03-2003: SN 2.2.4 / 2.1.8.562-96, the noise level inside residential premises should not exceed 35 dB. For comparison, there are several options for noise levels.

It is to the value of 35 dB that the noise level of the operating device is adjusted. This is achieved in several ways:

1. High-precision bearings are installed in the fan design, which are devoid of such properties as runout. No beating - there is no vibration of the motor shaft on which the fan impeller is mounted.
2. Precise balancing of the blades on the impeller creates conditions complete absence vibration of the air flow.
3. Precise selection of the number of blades, their angle of inclination.
4. The use of gaskets inside the body made of special rubber... In the process of down with operation, it does not burst or break. The gaskets are installed between the fan casing and the legs (brackets) of the electric motor.

All this in a compartment creates conditions for silent operation of devices. Their noise level does not exceed 25 dB. That is why they got their name.

Varieties of duct fans

Basically noiseless or bathtubs fall into two categories:

• in shape,
• by design.

In the first case, there are two groups: with a circular section of the body and with a rectangular one. In the second, these are axial fans, radial and centrifugal. Duct fans for round air ducts are most often used in private housing construction. But there is one point here that determines the installation location.

For example, very often the exhaust section of the ventilation system is vertical pipe (usually plastic or concrete) that runs through the structure from up to the roof. They hide such an air duct in the walls during construction or build it in the form of a separate box. A duct fan cannot be installed in it. Because if the device fails, it will be impossible to repair or replace. You can put a roof model on such a duct. Duct devices are mounted in air ducts that remain outside the building structure. For example, collected in the attic.

As for rectangular aggregates, they can be attributed to the group industrial fans for the hood. But this does not mean that they are not used in residential housing. Rectangular air ducts are also used in residential or office buildings. The photo below shows one of the models made of plastic. It is a wall or ceiling type device with a rectangular body. Pay attention to its blades, this is a centrifugal type fan. His blades are located along the direction of the air flow.

Axial fans

Axial model or axial is a device in which the direction of air movement corresponds to the location of the axis of the electric motor. An impeller is mounted on it. It is this design that has been widely used in everyday life, because:

• she has a low-power electric motor;
• but this power is sufficient to provide the required air exchange both in living quarters and in office buildings;
• simple tube design.

Attention! The axial fans themselves are the quietest models in use.

Radial

The principle of operation of these devices differs from the previous ones in that the movement of air masses does not occur along the axis of the electric motor shaft, but with an inclination, depending on the slope of the impeller blades. They can be tilted backward or forward. Accordingly, with a forward slope, the fans are installed on the supply air, with reverse to the exhaust.

But the slope affects more than just the direction of flow. There are other characteristics as well:

Duct exhaust fans for the kitchen or bathroom are generally radial models.

Centrifugal

The duct type centrifugal exhaust fan is a novelty that has appeared on the market relatively recently. But she took her place firmly. A distinctive feature of this type is an impeller with blades that are located longitudinally to the axis and do not have a slope in the longitudinal plane. They have a slope near the transverse plane.

The devices got their name only due to the fact that in the process of rotation of the impeller, the blades throw air towards the body of the apparatus, where a zone is formed high blood pressure... And in the center, on the contrary, there is a zone of low pressure. That is, there is a sharp movement of air from the center. It is the pressure difference inside the housing that creates the conditions under which the outside air begins to suck into the unit.

And one more distinctive feature Is a special manifold that acts as a diffuser. Its design helps to facilitate air intake into the fan.

Duct fan design and details

As mentioned above, the design of duct fans is a case, inside which an electric motor is installed. An impeller is attached to the shaft of the latter. The body has a cylindrical shape, but the length of the cylinder can be quite large relative to the diameter or not very large. The first includes models that are mounted on walls. To the second, which are installed in air duct systems.

The first ones are supplied with two decorative ones, which are installed on the surfaces of the walls located on different sides. The second ones are attached to the air ducts with special manifolds on clamps, which are supplied with the fan. The latter are usually sold assembled.

Some models are equipped with check valves that do not allow air to move in the opposite direction in non-standard situations, that is, into the building. We must pay tribute to the fact that although an exhaust fan with a check valve is more expensive, it protects indoor spaces from improper operation of the ventilation system. For example, summer, heat, the fan is "cut out" for some reason. If the temperature inside the house is lower than outside, then the air will begin to move in the opposite direction. Check valve it will not let it happen.

Technical characteristics of duct fans and selection rules

Like all devices of this type, ducted ones have one main characteristic: power (performance). More precisely, the volume of air that passes through the device per unit of time. Usually used for measurement cubic Meterspassing in one hour - m³ / h.

This indicator depends on two parameters:

• the speed of rotation of the electric motor (impeller), and the higher the speed, the higher the performance;
• overall dimensions of the fan itself, the larger they are, the more power.

In addition, when choosing, you need to pay attention to other qualities of the device. Namely:

1. Safety class. This refers to protection against dust and moisture. This is especially important if selected.
2. Functionality. This refers to the automatic operation of the device or standard. The second refers to the function when the device starts to work when turned on. To the first, when it turns on at regular intervals, programmed in the settings.

Fan performance

This parameter cannot be selected by eye. Because it will depend on the required air exchange in the room. If the conversation is about the general ventilation of the house, and not about a specific room, then you will have to add up the air exchange values \u200b\u200bof all rooms in the house. This will be the performance of the fan.

For example, a house in which the total living area is 100 m², the ceiling height is 3 m. The air exchange in them will be equal to the volume of the room, that is, 300 m³ / h. Here it is necessary to add the air exchange of the toilet and bathroom - 25 m3 / h each and 60 ÷ 90 of the kitchen, depending on the type and. It turns out:

300 + 25 + 25 + 70 \u003d 420 m³ / h.

This is the fan performance.

Geometric dimensions

The marking of this type of fans is based on the diameter of the inlet and outlet. Standard size for this parameter: 100 mm, 125, 160, 200, 250 and 315. Duct fans for 100 and 125 mm hoods are classified as domestic. Duct fans 160 and 200 mm are more often installed in restaurants, cafes, shops large area and other institutions. The rest can be attributed to industrial models, which are mounted in the air exhaust system of production shops. All of them operate on a 220 V electricity network.

For example, let's take a look at devices of the VKK brand (circular duct fan), in the photo and in the table below its dimensional parameters are shown.

How to install a duct fan correctly

From the photo shown above, it can be concluded that the device itself is selected according to the diameter of the duct. For example, if a 100 mm diameter exhaust fan is installed in the system, then the air duct must be of exactly this size.

1. So, the installation begins with the disassembly of the device itself. It is necessary to unscrew the clamps and pull out the fan itself.
2. After that, the delivery with two nozzles, which are rigidly connected to each other, and more often are a single part, are mounted in the air duct distribution. That is, the nozzles are inserted into the two ends of the pipes, between which the fan is installed.
3. Mount stand or brackets to wall or ceiling, or any other flat surface (columns, arches, etc.), near which piping runs. Fastening is done with dowels and self-tapping screws.
4. The fan is inserted into its place, attached to the branch pipes with clamps, under which rubber gaskets are laid.

Attention!The distance from the elbow to the inlet must not be less than one diameter. In the case of 100 mm silent duct fans, this distance should not be less than 10 cm. The distance from the outlet pipe to the branch or fitting should not be less than three diameters.

How to care for

If we are talking about devices that are installed in the air duct system, then maintenance is rarely carried out, especially if the pumped air is dry and clean. Once every two to three years, you can open it and clean it from dust. If possible, you can try to lubricate the bearings. But, as practice shows, this is a business for professionals.

For wall-mounted fans, it is recommended to remove the decorative grilles once a year and clean the inside of the cylinder. Everything else is inaccessible.

Do-it-yourself duct fan repair

What is never recommended is do-it-yourself repairs. Usually an electric motor or capacitor breaks down in a fan. If the first one burns out, then it will have to be replaced with a new one. And it's not a fact that you will find a motor in the store that matches the brand of the engine.

As for the capacitor, if you understand something in electrics, then you can handle the replacement. To do this, you will have to measure the capacity of the part with a multimeter. If it corresponds to the passport (indicated on the case) or a little more, then it is not about him. But if the capacity is less, then you will have to change. By the way, it is necessary to measure the parameter when the capacitor is disconnected from the network with its preliminary discharge (close the two ends with a wire).

But, as practice shows, high-quality models will serve faithfully for more than a dozen years. And if at one fine moment there was a refusal to work, it is better to put a new one instead.

Article

In addition to solving the usual issues of air exchange in working rooms, ventilation systems are capable of performing technological functions. An example of such use is the operation of dust fans that transport dust, waste of the technological cycle, grain crops, etc.

A distinctive feature of such an application is independence - loading, transportation and unloading of the material moved with the air flow is carried out automatically, practically without the help of people. At the same time, the parameters of the equipment must meet the requirements of the material and provide the necessary performance and pressure for maximum work efficiency.

Centrifugal dust fan VTsP 7-40 is one of the most common modifications of medium pressure dust fans. Purpose of the device - movement of dust-air mixtures (aspiration), transportation of materials of fine fraction and weight (pneumatic transport). The devices are not used to work with sticky or fibrous substances, as well as with a chemically active suspension that can destroy the material of the housing or impeller, air ducts.

The fan design consists of a spiral casing - a volute, inside which there is working wheel a certain diameter (it is indicated in the fan designation, for example, it means the impeller diameter of 6.3 decimeters or 630 mm). The impeller has 6 forward curved blades. The small number of blades is due to the need to prevent the transported particles from getting stuck between the elements of the casing and the impeller and between the blades, although this reduces the efficiency. The impeller can be mounted on the motor shaft (version 1) or have its own shaft driven by a V-belt drive, a system of pulleys from the electric motor (version 5).

Expert opinion

Fedorov Maxim Olegovich

Attention! Dust units in version 5 are more reliable and do not unbalance during operation.

In addition, it is manufactured in two versions:

• Open. The blades are attached at one point - on the shaft. Used to lighten the weight of the unit.

• Closed. The vanes are attached along their entire length to a disc mounted on the drive shaft (depending on the version). This option provides greater strength of the impeller to create the ability to increase the loads.

The direction of the outlet bell can be changed by turning the body in 45 ° increments relative to the axis of rotation. This is done when it is necessary to reduce the resistance of the air ducts or to prevent the accumulation of the transported material in the bend of the pipeline.

In addition, for ease of placement, there are fans with the left or right direction of the impeller movement (when viewed from the side of the suction pipe, the right ones rotate clockwise, and the left ones - counterclockwise).

The internal volume of the casing corresponds to the impeller diameter. For VTsP 7-40 fans there is big choice standard sizes determined by the last digits of the marking (VTsP 7-40-12.5 or). In addition, there are options with different power, speed of rotation of the electric motor, which affects performance, pressure, and changes the transportation capabilities of the system.

A feature of dust fans is the simultaneous production of hoods, cleaning of the workplace and dedusting of the serviced area. The devices have a large body thickness, the impeller shape is vane-like, the diameter of the inlet pipe corresponds to the equivalent outlet diameter (does not coincide with the fan number).

Selection procedure

The selection of a dust fan is carried out by comparing the characteristics finished devices with the conditions of a specific site, air volumes, mass of the transported product - dust, shavings, fine particles, etc.

Expert opinion

Heat supply and ventilation engineer RSV

Fedorov Maxim Olegovich

Important! The accuracy of the selection is determined by the careful calculation of losses, resistance of air ducts and other elements.

A wide range of ready-made device sizes (there are 8 in total) allows you to choose the best option that meets all production requirements.

The main problem with the selection the best option represents the calculation of losses in branched suction systems, since the load on them is unstable. In addition, there is a variable flux density, different concentration of suspended matter in the transported air. Such difficulties force us to make a choice according to maximum load, otherwise there is a possibility of traffic jams.

The selection takes into account the actual volume, productivity and operating pressure fan taken in. By comparing the actual parameters with the calculated data of the site, the most suitable fan is selected.

They have some structural differences from conventional centrifugal devices - fewer blades, specialization in dense, heavy flows, inadmissibility of pressure losses due to leaks or suction. Otherwise, the operation of dust equipment is almost the same as normal operation. exhaust systems, obeys the same principles and requirements.

Assumes correct selection equipment. One of the representatives of such equipment is a dust fan, the choice of which is carried out according to strictly defined indicators. The device itself must have special design, in order to work effectively in highly dusty rooms and be able to move polluted air from big amount solid particles.

All dust fans are structurally produced of a radial type or, as they are also called, centrifugal. There is no generally accepted classification of such equipment, but it is customary to divide them according to certain criteria:

• By appointment.
• By the generated pressure.
• By the speed of the created air flow.

Radial dust fans are classified as special purpose equipment.

Fans for special purposes

Special-purpose dust fans are devices designed for pumping and transporting non-aggressive air mixtures with a pollution density of no more than 1 kg / m3. These fans are not designed to handle sticky or fibrous materials. They can be used in the temperature range from -40 C to +80 C and are successfully used in aspiration and pneumatic conveying systems for grain crops.

There is also equipment designed for pumping explosive gases and air-gas mixtures. high temperature... It is produced in limited quantities under the order of a specific production, and has a significant cost.

Design features

Dusty centrifugal fan consists of a "spiral" or "volute" type body, which can be made of several grades of steel, depending on the purpose and conditions of use: galvanized, carbon, or alloyed. Also in the design of the body there is an intake outlet branch pipes, a motor and an impeller made in accordance with the purpose of this device.

There are two options for attaching it:

• On the motor shaft.
• The electric motor drives the impeller by means of a belt drive.

In order for solid particles not to get stuck between the body of the device and the impeller, a rather large gap is made between them, therefore, such devices have a coefficient useful action smaller than general purpose fans.

Despite the fact that the equipment is used quite often on many industrial enterprises, only three types are commercially available.

• TsP7-40 - has a diskless wheel with six blades. To reduce the level of noise generated by it, the wheel blades are bent forward. Some of the design features of this unit make it possible to assemble it for both right-hand and left-hand rotation.
• TsP6-46 - has an impeller, which consists of a disk with 6 blades attached to it. Due to some design features, this type of dust equipment cannot operate at high speeds, therefore it is considered a low-pressure apparatus.
• TsP6-45 - structurally no different from the previous model, but has forward curved blades. Thus, it is possible to significantly reduce the cost of operating this equipment.

These devices have significant differences in pressure generated. Many businesses require the creation high pressure, up to 12 kPa. Apparatus of this capacity are called high pressure dust fans. For certain operating conditions, impeller blades are produced from wear-resistant and anti-corrosion materials, among which the most commonly used are titanium and its alloys, vinyl plastic, stainless steel.

The apparatus with a plastic wheel has a higher anti-corrosion performance even than that of of stainless steel, but is significantly inferior in strength. The main advantage of such devices is their speed. Some models are able to develop a peripheral speed of up to 30 m / s.

Scope of application

Dust fans are widely used in the field agriculture, agricultural sector and industry. Most often, devices are used in industry to remove dust contaminants from the air, sawdust and metal shavings directly from working area... This equipment has found wide application in welding shops for the removal of smoke and slag. Such devices are used in pneumatic conveying installations for moving grain products.

Advice:
When removing abrasive particles, especially in aggressive environments, you should choose a fan with blades exclusively from wear-resistant and hard alloys.

The main task of ventilation is to create comfortable and safe conditions for a person's stay, as well as production processes according to the established standards.

The problem is solved by removing polluted air and replacing it with fresh air.

Modern supply and exhaust systems not only provide air exchange, but also control the level of humidity, change if necessary temperature regimeby heating or cooling the air, and, of course, filtering it.

Depending on the field of application, both the fans themselves and the filters used in them have significant differences. So, devices for household appliances have a completely different content than fans with filters for installation in complex industrial and knowledge-intensive enterprises.

Air filters are made from different materials, they can be paper, cloth, mesh, foam and are used to retain gas impurities and mechanical impurities.

Also quite popular dust filters, which are used for both domestic and industrial purposes.

• thin,
• rude,
• special for ultrahigh cleaning.

By filter material:

• fiber,
• metal,
• coal.

According to the degree of efficiency, they are divided into the following classes:
- Grade 1: traps almost all contaminants,
- Class 2: to eliminate contaminants larger than 1 micron,
- Class 3: for dust larger than 10 microns.
Which fan with which filter to use, experts decide in each case. More simple models intended for household use.

Quite different requirements are imposed on equipment for use in large enterprises.

To clean the air at home, filters of class 2 and 3 are sufficient, medical institutions, high-tech industries install fans with class 1 filters.

There are two main types of fans that use filters today.

This type fans provides high-quality air exchange, removes harmful impurities, unpleasant odors from the room and promotes penetration into the room fresh air... It is used in offices and apartments, as well as in business centers, residential and administrative buildings, in production.

In order for the air to enter the room purified, the supply fans are additionally equipped with special filters. They trap not only dust, but also small insects, odors, microorganisms.

There are the following types of supply fans with filters:

• mechanical mesh - perform preliminary and fine cleaning,
• with activated carbon, or adsorption,
• ionizers (electrostatic),
• HEPA - for fine cleaning, also used in vacuum cleaners,
• ultrasonic,
• ultraviolet and others.

For apartment and office space use the following types supply fans:

• wall-mounted (mounted in a hole in the outer wall),
• vents (matched to the size of the vents and installed in it),
• duct fans with filter (mounted in ventilation ducts),
• window (installed in the cut of the window glass).

Than more powerful fan and the better the filter, the more efficient the air purification will be.

This type of fan is usually installed in kitchens and bathrooms to remove unpleasant odors and moisture, and is also combined with supply systems for installation in other rooms.

The simplest variations of exhaust systems rarely cause problems during operation, especially with proper care and regular filter replacement. The principle of operation of the technique is to draw air through the grate using a paddle wheel and output it outside. The devices can also be built into walls or windows.

According to the diameter of the air ducts, devices with standard size 105, 125, 160 mm, but in stores you can also find products with other parameters for installation in complex industries.

The main types of filter hoods include the following:

• classic - work according to a simple scheme using switches, motion sensors and other elements,
• with a timer - they turn on only when the light in the room is turned on and continue to work until it is turned off (convenient if you went into the bathroom for a short time or, conversely, want to "dry" the room),
• with a humidity sensor - detects the excess of a certain level of humidity and starts working until this indicator drops to the optimal value.

Also meet combined models, from remote control and others convenient functions.

Activated carbon is perhaps the most popular absorbent, therefore it has been successfully used in ventilation systems for a long time. different levels difficulties.

The simplest example of a fan with a charcoal filter is cooker hood, which thanks to it effectively eliminates unpleasant odors, vapors, grease, even without installing an additional air duct. Such hoods in popularity have long "caught up" with traditional ones due to their reliability and ease of installation.

The finer the coal granules, the more efficient the air purification will be. Coal absorbs all impurities in its own pores. It clogs up rather quickly, especially with intensive use, therefore, after 3-4 months of use, it is recommended to replace it; with rare use, you can do this once a year. Otherwise, coal not only ceases to cope with its task, but itself becomes a source of air pollution.

In ventilation systems, charcoal filters are usually used as the second finer stage of cleaning, therefore it is recommended to combine them with other types of filters. Installation in apartments, offices, factories, compressor stations, business centers, residential buildings, cafes and restaurants is possible.

In production, industrial exhaust fans with a carbon filter are actively used. They are used in cafes and restaurants to eliminate odors, on treatment facilities, in hospitals, as well as for removing organic pollutants from the air.

Popular today cabinet fans with filterthat provide the necessary conditions work in electrical cabinets. Their main task is to remove heated air from the cabinet and inflow cold air.

As a result, the temperature inside decreases to the right level... It is possible to prevent strong heating of equipment elements, to protect electronics and electrics from failure and, in general, to extend the service life of equipment.

Modern devices are compact, durable, quiet operation, easy to install, UV and weather resistant.