One of the novelties of the climatic equipment market - silent fan. The device at the same time causes interest and doubt among potential buyers. Unusual fireless fan surprises external species and functionality.
Someone is solved on his acquisition, and someone is experiencing that money will be wasted. To dispel doubts in the performance of the equipment, you need to get acquainted with its device, the principle of work and features of operation.
The model that radically characterized by its appearance from other familiar to many of the childhood has been invented in 2009. Her creator is James Dyson.
He worked for about 30 years over the options for improving the vacuum cleaner and other domestic and industrial equipment. This English developer came up with many interesting and useful inventions, patents for which were sold in different countries World.
Silent models allow you to relax calmly, enjoying cool and without worrying that someone from domestic pets or children will suffer, hitting the fan blades
All its developments are distinguished by exquisite design and improved functionality. Mr. Dyson, working on improving the hygienic drying for hands, took the principle of its work for its new invention as a basis. So, in 2009, a special fan appeared, having a bladder.
About 4 years old, the leading engineers of the company J. Dyson spent to simulate the fan ring, which can most effectively skip the air, multiplying it repeatedly.
A blindfold device from Dyson in 2010 was sold at the homeland of the inventor for 199 English pounds. Such a price is difficult to call folk, but there were many people who wanted to acquire an innovative fan.
Therefore, now in the market you can find similar equipment from various manufacturers, including budget Chinese models.
In the near future, users will be able to try the novelty - ceiling option Silent fan. This is EXHALE FANS, developed by Nick Heiner
Device and operation of a fireless device
The fan without blades is often called in honor of its creator the Dyson fan or, as he himself called the device - the air multiplier of the air "Air Multiplier". This origional invention is in demand due to the ability to create a uniform air flow and fit perfectly into any interior.
The multiplier looks stylish, and the presence in the market analogs makes it an affordable wide circle of consumers.
Gallery of images
Constructive components of air multiplier
Air multiplier from Dyson is able to repeatedly increase the air flow at the outlet. Moreover, engineers, designers and technology companies create more advanced models that can not only blow items, furniture and people indoors, but also perform the functions of software.
However, the price of such new products exceeds 300 dollars.
Different manufacturers offer their fans without blades, characterized by quality assembly, noise, features and cost
Depending on the model, the device itself will differ. After all, the more functions it can perform, the more the buttons will be on the control panel.
The fan without blades consists of the following parts:
- housing;
- control Panel;
- plug.
In the case there is an engine responsible for the operation of the device. Also on this part there are special holes, through which air will be drawn when the multiplier is turned on.
The appearance of the device, all manufacturers can differ significantly, as well as, size, functionality and cost
You can control the fan mechanically or electronically using the panel. In most cases, remote control is provided. Many models from various manufacturers are equipped with a remote control, on average, at a distance of 3 meters.
The control panel includes:
- button on and off;
- reostat for adjusting the speed of operation;
- other buttons depending on the model of the multiplier and the functions provided by the manufacturer.
The plug has a round or oval shape. Its size depends entirely on the product model. This part of the fan may have a clear geometric shape or be in the shape of a heart, apple, etc.
The fancy shape of a blind fan will allow him to be not only a useful device in the room, but also become an original decor element.
Air multipliers by installation method can be divided into 3 types:
- outdoor;
- desktop;
- wall.
The first 2 types belong to portable devices, and the last to stationary. Often manufacturers provide for one model 2 options: mount on the wall and installation on the table. In this case, the fan is necessarily equipped with brackets with dowels.
It is important when you hang the device on the wall to use the components proposed by the manufacturer. Otherwise you can lose guarantees
Dyson Fan: work principle
Silent fans are able to pass through themselves to 500 liters of air in 1 second. The flow at the outlet is evenly distributed, gently enveloping all the space. With visual inspection, moving parts outside the working device are not observed. That is, at first glance, the air multiplier looks like.
Principle of such efficient work A blind fan is a multiple multiplication of the extended air. This is due to the special form of the plot and the presence of a hollow channel of a special form inside it.
The shape of the air channel of the fan on one side is wider than on the other. This allows air to significantly increase the speed when driving on it
First, the high-speed engine tightens the air through the small holes at the base of the instrument. Then this air moves to the plunger channel. The shape of the channel is designed by the same principle as the aircraft wing. Therefore, when the air moves inside the channel, its speed increases.
Special forms of the air channel and the structure itself make it possible to multiply to increase the volume of air passing through it (+)
From the channel, the air comes out with a narrower side, and the low pressure area is formed with the reverse. This provides active air tightening inside, the volume of which is 15-20 times higher than the initial, rotten engine.
As a result of people in the zone of the device, it blows much stronger than using a conventional blade fan.
Features of using multiplier
The sphere of using the fan without blades is very wide - it is a house, office, cottage, kindergarten, hospital or other municipal Institution. The exceptions are premises with a swimming pool, sauna, baths. It is important to ensure the effective removal of wet vapors.
The fact is that the device is safe if they enjoy capable members of society. Otherwise, use is permitted under the supervision of adult citizens.
The device adequately copes with fan functions, and more advanced models can perform the role of real air conditioners.
In addition to the soft distribution of repeatedly enlarged air flow, the fan without blades can moisturize the air and cool / warm. The user's percentage of the user specifies in the settings. The adjustment range depends on the instrument model and fluctuates, 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 still choose a model that can purify the air from harmful impurities, for example, from smoke or chad.
Manufacturers of even the cheapest models prefer to equip their instruments with the consoles remote control
Climatic equipment market is replete with suggestions different models Silent fans from many manufacturers. Among them as available models cost up to 100 dollars and expensive options famous brands with the functions of the present.
Among manufacturers offering their fireless equipment, the following companies can be noted: Flextron., Supra (Supra), Unisvet., Clever and Clean., Roward, Dyson., COOLGUY., Aaron., Renova., Orion., Bladeless, Bilyux, Magnit..
The price range of blind devices of these companies from 2,000 to 35,000 rubles or more.
An important characteristic that affects the level of comfort when using the fan is noise level. It can be 40 dB, 55 dB, 60 dB and more. it the most important parameterthat should be taken into account before buying.
When the noise of the fan is 60 dB and above, the person has fatigue after an hour of work and the head can get across
Noise level of a specific model manufacturers indicate specifications. Moreover, this is the limit level, which is achieved when the equipment is operating on maximum speed. In cheap devices, the stated noise level may not correspond to reality.
Pluses and cons of fireless fans
The air multiplier has its advantages and negative sides identified by users.
Among positive Parties you can note:
- safety;
- uniform air flow;
- minimum electricity consumption;
- convenient control;
- ease of care;
- stylish design.
Safety is ensured by the lack of blades and other moving parts outside the product. Also, thanks to the motor, located below, and the absence of vibration from rotation of the blades, the entire design was sustainable.
The special shape of the ring ring allows the fan to gently and evenly distribute air flows across the territory of the whole room.
Electricity consumption is most often 25 W and 40 W. Models with other characteristics are less common.
Control device is simple and understandable. All subtleties of the adjustment of the purchased model are described in detail in the instructions. The power of the air flow at the fine fan is also adjustable.
In addition to the pluses, a challenge device has its drawbacks:
- Noise effect - Sound level from 40 dB. The more powerful the device, the louder it will buzz at the maximum speed.
- High price. Equipment loses on this indicator with familiar paddle fans.
- Fragility design. This disadvantage is characteristic of inexpensive analogs of Chinese production.
Manufacturers seek to take into account all the shortcomings and wishes of customers, improving new versions of the fan. So, first to consumers offered different colors and sizes, then the very form of intricate. Later it came a turn to maximize the noise level produced by the device.
The next task was to reduce power consumption and adding additional features By moisturizing and heating / cooling the air passing through a blind fan.
Aromatization and ionization of air flows still exist only in expensive models of the last generation
Neckless device with your own hands
The question of creating the fan without blades to visit many craftsmen. During the experiments, domestic masters received many working homemade.
Option # 1: Plastic buckets
For the manufacture of the device use plastic container, simple fan and adhesive gun.
From ordinary I. available materials in a couple of hours you can build homemade fan without blades
For example, you can take:
- 2 plastic buckets of 5 and 10 liters;
- PVC pipe 110;
- distribution tee;
- stub.
First you need to cut off a piece of a piece of 15 cm long. Then in the 10-liter bucket to do the side of the hole strictly the same size as the outer diameter of the pipe.
Using the adhesive gun, it should be carefully and gently combined these 2 parts
The next step is to take a 5-liter bucket and cut 3 cm from the top edge. There is still a hole in the bottom, the diameter of which is 2 cm less than the bottom of the bucket. In the bottom of the larger bucket, you also need to make a hole of the same size and combine them adhesive pistol. This is a homemade blower.
Now it is to assemble the housing with the engine, the role of which will perform the axial fan. To do this, put the cap on the side nozzle of the tee, applying the glue layer there.
It is better to leave a small gap of 1.5-2 cm to have air access. Then I need PVC pipe to wear on one of the tonnel nozzles and mark the border - it will be a segment of about 10 cm to be cut off.
In this nozzle, place a sliced \u200b\u200bpart and make a cross-cutting hole of 5 cm long from the edge
It is here that the axial electric fan of the desired diameter will have to be put, and in the hole - output the wire for inclusion in electric network.
To give the finished self-catering of aesthetic species, all the details can be painted in one color aerosol enamel. For example, in white, beige or blue. The case is ready to connect to the network.
It remains to be placed on top of the homemade plumber of 2 buckets and include the fan in the network
If the body is inside the housing, then the homemade will perform the role of air conditioner. And when placing a piece of wool with 5-7 drops essential oil You can fill the entire room with a pleasant aroma.
Option # 2: Fan from plastic pipes
The prototype of the second option became a fireless brand device Dyson.. Case and technical part collected by homemade crafts finished product factory production.
Building useful in everyday life, we will start with the hull:
Gallery of images
The case is ready, now it should be equipped with a technical filling:
Gallery of images
Care and maintenance of the device
The fan without blades is able to serve the period declared by the manufacturer in the instructions only subject to the rules of its operation. It is easy to use and care. It is important to use the appointment device and not tolerate from place to place during operation.
If you need to rearrange the equipment, then take it follows the housing, and not for the enhancing.
To maintain a multiplier of air, it is enough to periodically perform such actions:
- brushing the plug hole to prevent them from clogging;
- wipe the blowup and the body of the device with a wet rag, removing dust and other contaminants.
Maintenance should be carried out as needed. Use special cleaning or detergents It is not required - the surface of the blind fans is well cleaned with a damp or dry soft cloth.
During the operation of the device, you do not need to forget about safety measures and in no case do not use them in case of breakdown
If a malfunction was discovered, then you should contact the specialists authorized to repair the climate equipment of a particular manufacturer.
An attempt to independently eliminate breakage can lead to a loss of a warranty on the fan. In the absence of repair experience such devices You can apply even greater damage to equipment.
About how from the primary materials to collect a fan without blades, can be viewed in the following video:
The fan without blades can be made "from scratch", spending at least effort and materials on this. Step-by-step instruction By assembling in a video clip:
Having considered the features of the device and the operation of a blind fan, reading with model near Different manufacturers, you can make your opinion about the device. Products OT. famous companies It is expensive, but completely able to replace the air conditioner.
Cheaper analogues are loudly noisy, creak and may not give the performance that is specified in the instructions.
Do you have experience using a blind fan? Or maybe you managed to assemble the aggregate personally? Please share information with our readers. Leave comments and ask questions on the topic below.
IN modern world Do not do without household appliances. They are designed to make our life comfortable and easier. Many of these "helping" funds do not change over several decades.
The same can be said about ordinary fans. However, the world is modern household appliances Actively develops. In 2009, the inventor James Dyson invented the fan without blades, which called the Dyson Air Multiplier.
Its design consists of a vertical stand, inside which is the electric motor. Aerodynamic ring is located on the stand, which may have different shape (circle, heart, oval, rhombus, etc.). A special section is placed on the aerodynamic ring with holes.
How does a fireless fan work?
If you are going to buy a blind fan, then surely you will be interested to know what is its principle of work. It uses the technology of the "air factor", as a result of which the laundered air is intensified 15-18 times.
The device of a blind fan consists in the fact that electrical engine Begins to rotate at a speed of 1,40000 revolutions per minute. The air is delayed through a narrow outer slit, which is located on the housing of the aerodynamic ring. Through the other gap, the air is pushed at a speed of about 90 kilometers per hour.
Pros and cons of a fireless fan
Like anything modern device A blind fan has a number of advantages:
- fast assembly;
- use of use;
- efficiency;
- constant and smooth flow of air;
- the presence of a remote control panel;
- neon lightsThe most models are able to replace the night light;
- built-in function automatic rotation fan;
- the ability to adjust the air flow velocity with the help of a row;
- the brushes in the inner part of the fan body are made of a magnetic alloy excluding coal dust accumulation;
- original design.
It is easier to care for such a fan simpler: it is enough to periodically wipe the inside of the aerodynamic ring with a damp cloth.
There is a fireless fan and disadvantages:
- high price;
- strong noise due to the work of the rheostat.
Types of fine fans
Total distinguished two types:
- floor;
- desktop.
Outdoor soft fan
For cooling the room big Square More may be required powerful fan. In this case, it is worth paying attention to outdoor fan without blades. A feature of such a fan model is that it is capable of not only cooling the air, but also heat it, that is, perform a function.
And since there are no blades in its design, such a fan model is absolutely safe. This is especially important if there was a need to put the fan in. In this case, you can not worry about the fact that the child is inappropriate can be born.
Desktopless fan
Due to its compact sizes, a boxless fan can be placed on the table. Thus, it will create a comfortable setting near your workplace.
If you accidentally dropped the fan on the floor without blades, then there is nothing terrible in this: it will work in the same mode. A durable body made of shockproof plastic is able to withstand any blows and drops.
If you have the need to purchase a fan, then you should pay attention to the model without blades. Easy operation, convenience and safety of use, the presence of a permanent flow of air that can be adjusted - these are the indicators for which you can forgive the fantastic fan so high on it.
Most recently, rather strange devices that have functions of a conventional fan, which have no familiar blades began to appear. Standard device This type looks like a ring mounted on a special end. At the same time, the air flow goes straight from the middle of such a ring, which seems fantastic and even magical. Many such a fan causes bewilderment, while others consider his work simple supernatural or sell.
In fact, the fan without blades has a pretty simple device, although in the principle of its action laid newest Development in the field of aerodynamics and technology. The fact is that the ring installed on the tube, inside the hollow, and on its inner perimeter made a special hole. The fan without blades has a turbine inside the cabinet, which supplies air pressure inside the ring, and it comes out through a hole, which has such aerodynamics, which its flow is sent to a certain side, namely through the circle itself. Thus, the directed masses are created, which, in turn, capture the air from ambient, creating a rather powerful stream. Therefore, such a device is often referred to as pressure. "
It is worth noting that the air flow obtained by such an appliance is evenly, not by portions, as using a conventional fan, which helps to increase its efficiency and significantly improves efficiency. Therefore, such a device is very good to use as a cooling fan. Its uniform flow will keep the necessary area under constant air pressure, which at the same energy costs will be much more efficient.
Thanks to its device, the fan without blades allows you to produce air volume 15 times more than the usual one. At the same time, its air pump works almost silently, which is also a very big advantage. Many models of such devices can be heated by air, allowing you to use the device as a heater, and the absence of blades makes it safe for children.
However, the most important advantage of such a fan is its uniform air flow, which can be compared with a light breeze, it allows you to feel yourself on the seashore. He does not strain his constant noise, so it's a pleasure to use such an appliance. Also, the fan without blades does not collect dust on itself. This has a positive effect on health and will provide an opportunity to use it to people suffering from allergies.
Thus, light-blass fans are the latest devices for the organization of life, which are not only very effective, but are economical and safe. At the same time, the price of such air is practically as much as the electric fan heater. This makes such a device available to almost everyone, and the remote control will enjoy the delicate flow of air from any room.
As the usual fan is acting, consisting of axis and blades, known many. But not so long ago on the market a blind fan gradually begins to conquer consumer sympathies. "What is this device? How can he pump air if there are no blades? Probably, this is too complex device, "many people say.
How to make air moving without blades
How does a fireless fan work? What complex technologies are used during the distillation of air masses?
In fact, the principle of work is quite simple. It is based on the law of physics, which refers to the pressure difference inside and outside the air flow and the natural desire to align the balance, directing the air flow to the low pressure region.
This principle of operation is laid in the work of a fair-free device capable of short term cool large square premises. This device consists of:
- round or oval Frame with a small opening for air drawing;
- the base on which the frame is firmly fixed (the base may additionally be equipped with a frame for fastening to horizontal surfaces);
- mini-turbine fixed inside the frame;
- a small motor located at the base of the device.
The fan without blades works like this:
- When the motor is turned on, the turbine installed inside the frame is driven.
- When rotating the mini-turbine, air is retracting through a special hole on the frame.
- The air environment under the influence of turbulence receives acceleration and is thrown through the output frame slot.
- The thrown thread creates a vacuum inside the frame where the air is rushed again to fill emptiness.
Energy when the device is mainly needed when the turbine is promoting, the rest physical processes Almost do not require energy costs. This contributes to the fact that a fair-free mini-fan can be connected even to low power supply sources, such as a car cigarette lighter.
Use area
The fan without blades can be installed everywhere. It may be:
Benefits
Turbulent blowing blows, unlike his blade "colleague", has a number of benefits:
disadvantages
Humanity has not yet invented the device with only advantages and non-flaws, but already close to this. Equipment without blades have only conditional disadvantages:
- Noise and vibration. The turbine works silently, but the atmospheric stream passing through a frame ring causes a hum and vibration.
- High price compared to conventional ventilating devices. But here it should be remembered that the design has the properties of air conditioners, but much cheaper them.
Cost
For price comparison with bladed structures, light-blass losing is too expensive (up to 20-30 thousand rubles).
A blindless aggregate is equal to the air conditioners of medium power, but it is much cheaper than them. But, unlike traditional ventilating devices, it not only drives aerial massesBut additionally cools them. It does not need specialized installation as air conditioning.
Self-making device
With the appearance of another novelty, many craftsmen immediately think about how to make such a hand. Is it possible?
It seems to be nothing complicated, you can get all the necessary components, but, unfortunately, it is not quite so. Even knowing the principle of action, and having all the necessary components of the details, it will not be possible to assemble the device with your own hands.
Why? Yes because but required detailsIt is necessary to know the size of the air supporting ring, the power of the turbine and the engine, as well as calculate the size of the opening for the atmospheric inflow, turbulence and the flow rate at the output.
Complicated? Probably, if there are friends-physics capable of calculating the necessary dimensions, such a devicor will easily make it with their own hands, and simply having the necessary fir-handed materials at hand, it will not work.
Safe ventilation devices without blades are convenient, practical, safe and different stylish design. Gradually, they are tested in the household appliances market of their blade "colleagues", conquering sympathies of buyers.
IN lately In RuNet, an advertisement of a safe-free fan periodically appears, we suggest to consider the device of this climatic device for the house and the principle of its action. We will also tell about strong and weaknesses This apparatus and basic characteristics. After which I will spend short review Several models of superbate fans, and in the completion of the article we will consider the possibility of creating such an unusual device with your own hands.
Construction and principle of operation
In 2009, J. Dyson presented to the world his own fan development. The design feature was the lack of blades, which, however, did not prevent the device to create a steady air flow. Moreover, the air volume at the outlet exceeded one or two orders of magnitude entering the turbine. Do you think magic? No, everything is much more serious - aerodynamics.
It's all about the profile of the rings, a special form is granted.
Due to this, the air flowing out of the holes is focused in such a way that the low pressure zone is formed before the ring (highlighted in a red oval in Fig. 3).
Fig. 3. Aerodynamic modeling of the air multiplier Dyson Since such an area is surrounded in front and sides increased pressureThe air is drawn from the back side of the ring, forming a steady directional stream.
Note that the compilation of the mathematical model of the profile, which makes it possible to achieve maximum effect and refinement of the technology, Dyson took about four years. Most Chinese analogs of its devices cannot give even the half capacity of the original apparatus. The inventor patented the structure, in particular, the profile of the ring and the structure of the turbine, injecting air, therefore, for the manufacture of full-fledged copies, it is necessary to purchase the right to production.
How does the fan work?
Since the drawing of the device is under copyright protection, we will tell about the work of the fan, based on the drawings used in the advertising of this product.
Explanation of the drawing:
- A - holes for air intake to the turbine.
- B - turbine engine.
- C - air flow inside the ring.
- D - Ring.
When the turbine is turned on, the air begins to fill the air into the ring, from where it goes under pressure into a small slot (and in Fig. 5) or small nozzles.
Fig. 5. A - gap for air outlet; B - Engine for rotation of the ring Some models (for example, FLEXTRON FB1009, Kitfort KT-401, HJ-007, Bork) have a built-in engine (in Fig. 5), which allows changing the direction of the ring, and, therefore, the air flow. Part of the manufacturers provided for the possibility of installation in the design of a special aerosol, as a result of AIRMULTIPLIER DYSON (this is how Dyson called his brainchild) additionally acts as air freshener (part model Row Kitfort, Supra, Renova, Vesson).
There are desiccable fans with cooling and heating air, such appliances It is quite possible to refer to the category of full-fledged climate techniques.
Original devices are available with a power setting (turbine) with a power of 25 or 40 W. In Chinese analogues, this parameter may vary in a wide range. Such a small power is enough to ensure that over the ring passes up to 500 liters of air per second (again, this value concerns the original products).
Pros and cons
Having considered the structure of air multipliers, you can proceed to the analysis of their advantages and disadvantages. Let's start with the first. Benefits:
Unfortunately, this device has disadvantages that are significantly reflected in the buying demand:
- High price original modelsIt can reach up to 20 thousand rubles and more, which is comparable to buying and installing inexpensive split system. However, with such a price you can come to terms if a blind fan has functions of heating and cooling air. Note that the Chinese analogues are substantially cheaper, some are even an order, but, as already described above, they have less efficiency.
- Despite the fact that the power plant is low noise, in the process of operation, this device makes a characteristic hum that resembles the operation of the aircraft turbine. Moreover, at the maximum power, the noise level can reach 60 decibels, which is quite a lot, because there is enough hour to get a head from it. True, in this mode, the device creates so much strong flow Air that arise uncomfortable sensations, so the maximum level of work is practically not used. In normal mode, the apparatus is no less less.
- The declared in advertising 15-fold increase in flow is technically correct, but there is a certain nuance. This value is characteristic of the maximum mode that is practically not used.
Review of models on the market
We give as an example several models of devices available on the Russian market.
Bladeless Fan, a small inexpensive bench-blasting fan of a superbate type. Produced in China. The cost of about $ 40- $ 50. Minimum functions, small power (12 W) allow you to get a airflow, quite acceptable for desktop devices.
Another a budget option With a minimal functional set - Fan Leader, if you believe suppliers, Polish production. Also in desktop execution, in the same price range, but a slightly greater power - 35 W. Characteristic feature – work zone Made in the form of oval. Note, this form is found in many models, for example, Orion OR-DSO2.
Well, for comparison, consider original design - DAYSON HOT + COOL model. This device is produced in the outdoor performance. It has the air heating function. The power of the turbine is 40 W, in the heater mode - 2 kW. There is a remote control, the information board indicating the selected mode and the specified temperature. For all this pleasure it will be necessary to pay about 500 - 540 dollars.
Ending the topic of review, give comparative table Model series Dynson and Chinese analogue Unico Ion.
| Name | DYSON AM-01 | DYSON AM-02 | DYSON AM-03 | DYSON AM-04 | Unico Ion. |
| Approximate value, $ | 260 | 310 | 340 | 345 | 50 |
| Functionality | cooling | cooling | cooling | cooling / heating | cooling |
| Airflow speed (MAX), l / s | 450 | 600 | 700 | 130 | 450 |
| execution | desktop | Outdoor | Outdoor | Outdoor | Desktop |
| Manual adjustment of the angle of inclination | + | – | + | + | + |
| Hand set of height | – | – | + | – | – |
| Automatic turns 90 ° | + | + | + | + | + |
| Smooth flow speed adjustment | + | + | + | + | + |
| Noise level (MAX), dB | 64,5 | 63,0 | 65,0 | 64,0 | 60,0 |
| Power consumption (MAX), W | 40 | 65 | 65 | 2000 | 35 |
| Packaging dimensions, mm | 547x356x152 | 1007x190x110 | 1480x450x280. | 579x200x153 | 580x330x180 |
| Weight (gross), kg | 1,80 | 3,35 | 4,30 | 2,47 | 2,50 |
Is it possible to make a fireless fan with your own hands
There are several videos on this topic in RuNet, where to create a ring are used. various materialsstarting from plastic buckets and finishing sewer pipes PVC. Power plants are also varied, mostly powerful coolers from processors, but there are originals using a vacuum cleaner engine. The effectiveness of such structures and their characteristics cause greater doubts, especially no measurements are given.
As you remember, to create a low pressure zone, it is necessary to focus the air flows in a special way. Using the usual healthy material, it is quite difficult to make it, and the work for the sake of work does not carry rational meaning.