Fan without blades: principle of operation, types, pros and cons

Advanced air multipliers are gaining immense popularity in the home appliance market. Devices without blades are easy to use, highly efficient and economical. A modern device causes a lot of controversy among potential buyers with its design and functionality.

1

History of creation

The bladeless fan looks very different from the product we are used to. The first device appeared in 2009 . thanks to creator James Dyson. He devoted almost 30 years to work aimed at improving many types of household appliances. The English developer managed to come up with many unusual, useful and necessary inventions.

Many countries bought a patent for the production of these new products. Manufacturers are attracted not only by the usefulness of the devices, but also by the improved design and functionality of the equipment. When developing a special fan without blades, more than 4 years were spent modeling a ring capable of efficiently passing air flows, multiplying it many times over.

The device quickly gained popularity and soon after its appearance on the market similar fans began to be sold. Now there are even more budget options from Chinese manufacturers.

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2

Fan device

The operation of this device is very similar to the operation of a jet engine. A high-speed turbine with a 40 kW engine, which are connected by a common shaft, is mounted at its base. Only two main parts (base, ring diffuser) are included in the bladeless fan. The principle of operation is based on the operation of a turbine, which ensures the flow of air into the device.

The engine of the device is equipped with a Heimholtz chamber , which captures and dissipates operating noise. The body of the device has many holes that suck in air. The device's ring diffuser is created according to the rules of aerodynamics. There is a special slot on the surface on the inside. With its help, air is pumped into the working area.

The cross-section of the ring has the shape of a drop, since this shape is ideal from an aerodynamic point of view. It minimizes resistance around itself, which prevents the formation of turbulence.

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2.1

Principle of operation

The bladeless fan used the technical principle of a turbine. Located at the base of the device, the turbine sucks in air from outside through the openings of the housing and supplies it to an annular diffuser with a very narrow slot. Its specially adapted profile works to increase the efficiency of the pressure difference. This causes the air to be pushed out with force due to the aerodynamic effect.

The resulting flow is immediately filled with air surrounding the diffuser ring. Due to this, the air flow increases by 15-20 times for a fan without blades. The operating principle of such a device is called an “air multiplier”. This allowed us to obtain a safe and economical design.

It creates a dense monotonous flow that refreshes the air masses. During operation, it functions unobtrusively. The device is almost silent; It's very interesting to watch how a fan works without blades. Unlike a conventional device, it does not create a draft and does not cause discomfort.

How does a silent version of an exhaust fan work?

Rating of the best fans without blades

Budget models

Middle price segment

Premium models

Coolguy - small and stylish

The coolguy “Invisible Fan” is an excellent example of modern climate control equipment for home and office. This is what the advertising says and the manufacturer himself positions his creation. A small and stylish rotorless fan with an unusual design is made in a desktop version. Thanks to its small dimensions, it can easily find a place on the desktop, making it useful for people who spend a lot of time in office work. But coolguy can also be an excellent helper in everyday life thanks to the included wall mount.

In addition, the advantages of the device include:

• Smooth adjustment of air jet force.
• The device is equipped with an automatic rotation mode of 45°.
• Adjusting and fixing the angle of the frame.
• Convenient remote control.
• The installation is equipped with a timer for 60 and 120 minutes.
• Low (compared to analogues) noise level, only 55 dB.
• Economical. Device power 35 W.

The cost of coolguy varies around 6 thousand rubles.

Advantages and disadvantages

Bladeless fans, like other models, have a number of advantages and disadvantages. Advantages:

• there are no exposed moving parts, this ensures the safety of children and animals;
• do not dry out the air;
• do not require maintenance.

Flaws:

• noise during operation is about 40 decibels;
• relatively high price;
• fragile body design.

3

Main advantages

A bladeless device has many advantages over a conventional fan. It is ideal for use in home and office spaces. The devices have the following positive characteristics:

• are silent and do not create vibration;
• there are no drafts during operation, they do not accumulate dust, since they do not have parts for this, which makes a fan without blades hygienic;
• horizontal and vertical rotation volume makes them very convenient to use;
• the devices are quite stable;
• due to the absence of external moving parts, they are considered safe, which eliminates injuries;
• low energy consumption, because they consume much less than blade fans;
• stand out for their modern design.

All of these devices are equipped with remote control, which makes them very convenient to use. The control panels are attached to the body so that it is convenient to operate and not lost. Almost all remote controls are equipped with various options where you can select the desired operating mode. This product helps you get fresh air flow at home and at work without noise or discomfort.

In addition to its advantages, the fan has its disadvantages: if you buy a more powerful device, it makes noise during operation, which is very noticeable at high speeds. The price of modern models is high. If you buy cheaper analogues from Chinese manufacturers, they are unstable and creaky.

Manufacturers of bladeless fans are constantly working on existing shortcomings. They periodically improve new models, taking into account consumer feedback and suggestions.

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The main advantages and disadvantages of the “invisible fan”

The most important advantage of such devices is safety. Due to the absence of moving parts within reach, such a device cannot hurt anyone. In addition, it can be noted:

• Energy efficiency of such a device. With the same energy consumption, bladeless models have 6-8 times higher power compared to conventional fans.
• Uniformity and narrow focus of the air flow, in contrast to the “ragged” and turbulent one created by the blades.
• Good stability even for a bladeless floor fan, due to the absence of vibration created by the blades of classic models.
• Possibility of smooth power adjustment.
• Possibility of remote control of the device.
• Easy maintenance and care.

Despite such impressive characteristics, the design of this climate control device is not without its shortcomings. The main and quite significant disadvantage is the high noise level created by the device. The second, and probably the last drawback is the fairly high cost of the device.

According to experts, household models have the greatest prospects due to their safety. There is hope that engineers will eliminate the high noise level of bladeless fans, and the high demand for such models will force many manufacturers to refocus on their production, which will inevitably lead to a reduction in price.

I would like to start this review with one of the most popular devices among our compatriots, operating on the basis of “air multiplier” technology, the Dyson Air Multiplier 01 fan. It was this device that became the founder of all models of “air multipliers,” as the innovator himself, the British, called his invention James Dyson.

Care and maintenance

Bladeless fans are durable and do not require special care or maintenance. Like all household electrical appliances, they should not be turned on if moisture gets inside the housing or in rooms with a relative humidity above 85%. Before turning it on for the first time in a new place, you need to check the voltage in the outlet (220V). The product can only be repaired by qualified personnel with a clearance group of at least IV. Filling the internal tank with water can only be done after disconnecting the fan from the mains. If the device has been dropped from a great height, it must be inspected by a specialist before turning it on. This must be done even when the fan is working after a fall and there are no visible cracks or chips on the case.

Mysterious "air multiplier"

The bladeless fan was a bold step in the evolution of climate-controlled home appliances. The honor of the invention belongs to the Englishman James Dyson, an engineer and industrialist, the author of a huge number of non-standard discoveries in solving everyday everyday problems.

Watching how the blast of air from the slot of a hand dryer captured nearby layers of air and pulled them into its flow, he became fascinated with the idea of ​​​​creating a bladeless fan. A long path of research and development, intellectual and financial expenditures was passed before the device appeared on the shelves and fascinated everyone with its mystery.

Nowadays, the assortment of counters in household appliance stores represents a whole assortment chain of bladeless fans. They differ in power, purpose, design, and there are models to suit every taste and budget. Devices from Dyson cost up to 25,000 rubles, economic analogues from other companies cost up to 2,500 rubles. There are table and floor designs, models with a diffuser in the form of a simple ring, in the shape of a heart, an apple, a diamond, or in the form of the contours of funny children's toys. Models are equipped with a remote control.

Design features

A fan without blades consists of two main parts:

• grounds;
• ring diffuser.

A high-speed turbine is mounted into the base of the device, equipped with a 40 W engine, with which it has a common shaft. The turbine provides air movement in the device. The engine is equipped with a Hemholtz chamber to capture and dissipate engine noise. The base housing of the device has many holes for air intake.

The fan ring diffuser is made according to the laws of aerodynamics. There is a special slot in the ring on its inner surface through which air is pumped into the working surface. The cross section of the diffuser ring is a drop. This shape is aerodynamically ideal from the point of view of minimizing drag; turbulence zones do not form around it.

How does a bladeless fan work?

The strange futuristic “ring on a leg” actually consists of three parts. They are structurally and mechanically assembled in such a way as to provide air blowing and blowing.

The “leg” of a fan without blades is actually its housing with a control panel. The housing contains a motor for air intake and a small grille through which it is taken in. On the control panel there is a power button and, optionally, a rheostat for adjusting the ventilation intensity (the classic Dyson fan does not have one).

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But the “ring” itself is the so-called blower. The inside of the ring has a special shape: along the entire contour there is a channel through which air moves. We’ll tell you why this is necessary now.

Design and principle of operation

In 2009, J. Dyson presented the world with his own fan development. The design feature was the absence of blades, which, however, did not prevent the device from creating a stable air flow. Moreover, the volume of air at the outlet exceeded that entering the turbine by one or two orders of magnitude. Do you think it's magic? No, everything is much more serious - aerodynamics.

It's all about the profile of the ring; it is given a special shape.

Bladeless Fan Ring Profile

Thanks to this, the air coming out of the holes is focused in such a way that a low pressure zone is formed in front of the ring (highlighted by a red oval in Fig. 3).

Rice. 3. Aerodynamic modeling of the operation of the Dyson Air Multiplier

Since such an area is surrounded in front and on the sides by increased pressure, air is drawn in from the back of the ring, forming a steady directed flow.

Note that it took Dyson about four years to compile a mathematical model of the profile that would allow achieving maximum effect and finalizing the technology. Most Chinese analogues of its device cannot produce even half the power of the original device. The inventor patented the design, in particular, the profile of the ring and the structure of the turbine that pumps air, so in order to make full-fledged copies it is necessary to purchase production rights from the author.

What's cool about a bladeless fan?

Firstly, it is silent. How often on a hot July night did you have to toss and turn while listening to the ringing of mosquitoes and the rattling of a fan!.. This will not happen with the Dyson: the blowing occurs softly, without engine noise, the crackling of blades and the effect of vibration. You can sleep peacefully under it (unfortunately, it does not drive away mosquitoes). Here's a Dyson fan you can put on your bedside table:

Secondly, it can be used “in the opposite direction” - as a heater. To do this, a heating element is added to the blower, and the drawn air becomes warm. So this is a two-in-one device - for example, this Dyson Pure Hot+Cool

.

And not even two in one, but four in one! Because if you additionally add a HEPA filter and an ultrasonic humidifying element to the device, it also becomes an air purifier and humidifier. This is an MFP for ventilation in an apartment. For example, this Dyson AM10

.

With the onset of heat, we remember fans, the simplest and most accessible human inventions for freshening the air. The classic fan design consists of an engine, onto the shaft of which an impeller with many blades is attached. During operation of the fan, air is sucked in from the rear side and, passing through the blades at an increased speed, is pushed forward, creating a cooling and freshness effect. A conventional fan has a number of disadvantages: noise and vibration from the blades, which collect dust and air pollution. In order to clean them, it is necessary to remove the protective grille. The speed of such fans is regulated in only a few modes, and it can be difficult to adjust the blowing angle. The alternative device we offer does not have these disadvantages. This development was invented by Dyson engineers, presenting an almost revolutionary solution in the field of air ventilation. Thanks to them, the world learned what a bladeless fan is. And today we will collect it at home.

Comparative Advantage

These fans:

• comfortable, as they are silent and do not create vibration;
• hygienic, as they have a soft, pleasant air flow and do not create drafts, are easy to clean, and do not have parts that accumulate dust;
• convenient, as they have sufficient volume of vertical and horizontal rotation;
• stable, since the heaviest part of the device is located at its base;
• safe, as they do not have external moving parts that pose a threat in terms of household and child injuries;
• economical, despite the innovative advantages that a fan without blades has, its price is equivalent to the price of outdated bladed models;
• characterized by low energy consumption, the device uses 98% less energy compared to blade fans;
• aesthetically pleasing, as they have a modern design.

The bladeless fan is ideal for use at home and in the office. Modern design, comfortable air flow, noiselessness and absence of vibration, the possibility of remote control and the presence of a range of modes, efficiency, economy, hygiene and safety - all these characteristics are successfully combined by an innovative fan without blades. Reviews of its use eloquently state that it helps make the owner’s rest complete and his work productive.

Fan without blades

The original device is gradually gaining momentum among users who are already convinced that the unit works effectively.

Fan without blades: operating principle

Based on the appearance of the device, it is not immediately possible to understand its purpose. A fairly simple design effectively transmits powerful air flow. The air moves through the air intake, followed by exit from the opposite side at high speeds. An aerodynamic device is designed to create low pressure in order to roll out air flows at the inlet. The built-in turbine is used to quickly change air masses, so the equipment is more efficient than a conventional fan.

Operating principle of a fan without blades

This type of device passes approximately 500 liters of air per second, and the supply is evenly distributed throughout the room. The creation of models was based on the operating principle of aircraft jet engines.

Healthy! Modern units do not take up much space in the room, but at the same time efficiently blow the room with a uniform air supply. They are easy to use; just read the instructions to fully understand the operating principle of the device.

Design

With the help of innovative technologies, the device is produced with various functionality. The design of different models may differ slightly, but all copies consist of the following parts:

• Frame;
• Blower element;
• Control Panel.

  Fan design

On the body there is a motor, which is responsible for the full operation of the device. The process of drawing in air is carried out through holes located on the base of the device.

The unit is controlled mechanically or electronically. Most models operate via remote control.

The control panel is equipped with the following functions:

• On/off key;
• Rheostat - designed to regulate speed;
• There are additional options depending on the functionality of the device and the manufacturer.

The blowing base is made in a round, oval or any other geometric shape. This part is produced in different sizes, depending on the model of the device.

Areas of application

It is used in everyday life, in production, and has no restrictions or special requirements for use.
The absence of blades makes such a device completely safe for health, so it can be installed even in kindergartens, schools, and hospitals. The small parameters of the equipment allow it to be used in private homes, country houses, and offices. Healthy! The device can be quite multifunctional and can be used for cooling, heating and even humidifying the air. However, this functionality is available in more expensive models.

Types of fan

There are three types of bladeless units; this division of devices is based on their installation principle:

Advantages and disadvantages

Any household appliance has its positive and negative sides. When purchasing such a device, you should know the advantages and disadvantages and choose the device based on these factors.

The difference between the operation of a conventional fan and a bladeless one

Advantages:

• stability - the motor is located on a reliable leg, due to which it does not fall;
• high level of safety - in the absence of rotating parts you cannot get hurt;
• productivity - climatic requirements are achieved in a short period of time, and the room is cooled evenly throughout the room;
• original design;
• compactness - can be installed in any convenient place;
• economical - consumes little electricity;
• does not dry out the skin;
• practicality in care - easy to clean, because there are no small parts;
• The blowing power is adjusted.

  These fans are absolutely safe

Flaws:

• increased noise level, minimum 40 dB;
• quite an expensive pleasure.

If there is a need to purchase equipment to freshen up a room, you should pay attention to a bladeless fan, which will adequately replace an air conditioner and easily cope with the tasks. It will perfectly brighten up any interior, and the price is much cheaper than an air conditioning unit.

Design and operation of a bladeless device

A fan without blades is often called a Dyson fan in honor of its creator or, as he himself called the device, an Air Multiplier. This original invention is in demand due to its ability to create a uniform air flow and fit perfectly into any interior.

The multiplier looks stylish, and the presence of analogues on the market makes it accessible to a wide range of consumers.

Image gallery

Photo from

An effective solution for apartments and houses

Safe fan in the interior

Guaranteed equipment stability

Rotating fan stand

Structural components of the air multiplier

The Dyson air multiplier is capable of multiplying the air flow at the outlet. Moreover, the company’s engineers, designers and technologists create more advanced models that can not only blow air over objects, furniture and people in the room, but also perform air purification and humidification functions.

However, the price of such new products exceeds $300.

Different manufacturers offer their fans without blades, differing in build quality, noise level, features and cost.

Depending on the model, the device itself will differ. After all, the more functions it can perform, the more buttons there will be on the control panel.

A fan without blades consists of the following parts:

• frame;
• control Panel;
• blower

The housing contains a motor that is responsible for the operation of the device. There are also special holes on this part through which air will be drawn in when the multiplier is turned on.

The appearance of the device from all manufacturers may differ significantly, as well as size, functionality and cost.

The fan can be controlled mechanically or electronically using a panel. In most cases, remote control is provided. Many models from various manufacturers are equipped with a remote control that operates, on average, at a distance of 3 meters.

The control panel provides:

• on/off button;
• rheostat for adjusting the speed of operation;
• other buttons depending on the multiplier model and the functions provided by the manufacturer.

The blower has a round or oval shape. Its size depends entirely on the model of the product. This part of the fan can have a clear geometric shape or be in the shape of a heart, apple, etc.

The whimsical shape of a bladeless fan will allow it not only to be a useful device in the room, but also to become an original element of decor

Air multipliers can be divided into 3 types based on installation method:

• floor;
• desktop;
• wall-mounted

The first 2 types refer to portable devices, and the last one to stationary devices. Manufacturers often provide two options for one model: wall mounting and table mounting. In this case, the fan must be equipped with brackets and dowels.

When hanging the device on the wall, it is important to use the components offered by the manufacturer. Otherwise you may lose your warranty

Dyson fan: operating principle

Bladeless fans are capable of passing through up to 500 liters of air in 1 second. The outlet flow is evenly distributed, gently enveloping the entire space. During a visual inspection, no moving parts are observed outside the operating device. This is exactly what an air multiplier looks like at first glance.

The principle of such efficient operation of a bladeless fan is the multiple multiplication of drawn-in air at the outlet. This occurs due to the special shape of the blower and the presence of a specially shaped hollow channel inside it.

The shape of the fan air channel on one side is half as wide as on the other. This allows the air to significantly increase speed as it moves through it.

First, a high-speed motor draws air through small holes at the base of the device. This air then moves into the blower channel. The channel shape is designed on the same principle as an airplane wing. Therefore, when air moves inside the channel, its speed increases.

The special shape of the air channel and the design of the device itself make it possible to repeatedly increase the volume of air passing through it (+)

Air exits the channel from the narrower side, and a low pressure area is formed on the opposite side. This ensures that air is actively drawn in, the volume of which is 15-20 times greater than the original drawn in by the engine.

As a result, people in the operating area of ​​the device are blown much stronger than when using a conventional blade fan.

Features of using a multiplier

The scope of use of a fan without blades is very wide - in a home, office, cottage, kindergarten, hospital or other municipal institution. The exceptions are bathrooms, rooms with a swimming pool, saunas, baths. There it is important to ensure effective removal of wet vapors.

The fact is that the device is safe if it is used by capable members of society. Otherwise, use is permitted under adult supervision.

The device adequately copes with the functions of a fan, and more advanced models can serve as real air conditioners

In addition to the gentle distribution of multiply increased air flow, a fan without blades can humidify the air and cool/heat. The user sets the humidity percentage in the settings. The adjustment range depends on the model of the device and ranges, on average, from 30 to 70%.

As for the heating or cooling function, it is available in more expensive models. The desired parameters are specified by the user. You can also choose a model that can purify the air from harmful impurities, for example, smoke or fumes.

Manufacturers of even the cheapest models prefer to equip their devices with remote controls

The climate control equipment market is replete with offers of various models of bladeless fans from many manufacturers. Among them are affordable models costing up to $100, as well as expensive options from well-known brands with the functions of a real air conditioner or split system.

Among the manufacturers offering their bladeless equipment, the following companies can be noted: Flextron , SUPRA (Supra), UNISVET , Clever and Clean , Roward , Dyson , Coolguy , Aaron , RENOVA , Orion , Bladeless , BiLux , MAGNIT .

The price range of bladeless devices from these companies is from 2,000 to 35,000 rubles or more.

An important characteristic that affects the level of comfort when using a fan is the noise level. It can be 40 dB, 55 dB, 60 dB or more. This is the most important parameter that should be taken into account before purchasing.

When the fan noise is 60 dB or higher, a person will feel tired and may have a headache after just an hour of operation.

Manufacturers indicate the noise level of a specific model in the technical specifications. Moreover, this is the maximum level that is achieved when the equipment operates at maximum speed. For cheap devices, the declared noise level may not correspond to reality.

Advantages of the device

The main advantages of such a climate control device are the following factors.

• Sustainability. The center of gravity falls on the footrest, where the motor is located. This gives stability to the structure and will prevent it from falling if the device is accidentally caught.
• Safety is ensured by the absence of rotational elements.
• High performance. The device is able to quickly create a comfortable indoor climate by evenly distributing cooled air throughout the space. By installing a floor fan near the window, the room will always be fresh and cozy.
• Low energy consumption will save energy costs.
• Ease of maintenance. Due to its simple design and the absence of small parts, the device is easy to clean from dust with a regular dampened cloth.

Despite the fact that such a fan appeared on the market relatively recently, it confidently occupies its niche in the consumer range. Customer reviews are only the most positive, but most of all it amazes with its creative appearance, thereby attracting special attention. Unlike a conventional fan, it distributes air masses evenly and gently, creating a comfortable atmosphere in the room. The power of the device allows you to quickly refresh the climate, while not drying out the skin during prolonged use.

Thanks to low energy consumption, you can allow the device to operate continuously in sultry heat.

A variety of climate control equipment allows you to choose the most optimal device that meets your expectations. A turbulent blower, due to its high efficiency and power, can replace an air conditioner, but at the same time it is significantly lower in cost and free of charge.

Main selection criteria

Before purchasing equipment without blades, you need to familiarize yourself with its technical characteristics and the main selection criteria in order to select the optimal model that meets your individual needs.

Size

This parameter depends on the type of device, but generally they are produced in compact dimensions. Mini-units are so mobile that they can be placed in a car. Floor-standing units take up more space, their height can reach 55 cm, individual devices can be higher. Due to its small size, the device is easily transported and installed in a convenient place.

Power

This indicator affects energy consumption, air exchange efficiency and noise level. For large rooms, the best option would be a powerful device that will efficiently cool the space. In this case, loud work cannot be avoided, but the level of climatic conditions will be fully justified.

For large rooms, choose a powerful device

Air exchange

To ensure good air circulation in a spacious room, you don’t need to skimp on a cheap fan, because such equipment will have no effect. For large offices it is necessary to select models with an indicator of 250 m

3

/hour, and if the parameter is lower, the room will not cool completely.

Rotate the ring

When the working element is rotated relative to its axis, a greater coverage of the ventilated area occurs. The main part of climate control equipment is designed with a rotation angle of up to 90 degrees, but analogues are produced with an indicator that is an order of magnitude greater; their coverage can reach 360 degrees. Such equipment is capable of quickly creating the desired temperature in the room around the entire perimeter.

Number of speeds

Modern technology is equipped with wide functionality, including smooth adjustment of air supply speeds. A convenient option allows you to enjoy a comfortable coolness that gradually envelops the entire room. Models with different numbers of speeds are good for use if there are children. You can control the air supply that suits your baby.

Review of models on the market

Let us give as an example several models of devices available on the Russian market.

Bladeless Fan, a small, inexpensive bladeless desk fan. Made in China. The cost is about $40-$50. A minimum of functions and low power (12 W) allow you to obtain an air flow that is quite acceptable for desktop devices.

Relatively inexpensive Chinese Bladeeless Fan

Another budget option with a minimal functional set is Fan Leader, which, according to suppliers, is made in Poland. Also in a desktop version, in the same price range, but slightly higher power - 35 W. A characteristic feature is that the working area is made in the shape of an oval. Note that this form is found in many models, for example, Orion OR-DSO2.

Fan Leader

Well, for comparison, let’s look at the original design - the Dayson Hot + Cool model. This device is available in a floor-standing version. It has an air heating function. Turbine power is 40 W, in heater mode – 2 kW. There is a remote control, an information board indicating the selected mode and the set temperature. For all this pleasure you will need to pay about 500 – 540 dollars.

A fine example of original Dayson Hot + Cool products

Concluding the topic of the review, we present a comparative table of the Dynson model range and the Chinese analogue Unico ION.

Rotorless fan quattro elementi 771 398

Externally, it is practically no different from the product of the British innovative engineer. The only external difference that can be noticed is the diameter of the frame, which is 25 cm. Just like in the Dyson 01, a 45 W electric turbine sucks air through a grille at the bottom of the body and throws it out of a 1.3 meter gap. mm. located around the perimeter of the ring. This quattro elementi 771 398 table fan is 5 cm lower in height than the prototype, which is 45 cm.

Quattro elementi 771 398 is equipped with a rotary system, smooth rheostat-type air flow speed adjustment and air ring tilt angle adjustment. For ease of control, the device is equipped with a remote control. Unlike Dyson, the cost of this device was a pleasant surprise. In Russian stores, this installation can be purchased within the range of 3300 - 4140 rubles.