Behind last years a large number of new products have appeared household appliances. Consumers are offered a diverse range of modern products and often in updated designs. The most popular is a bladeless fan, which operates in an economical mode and can effectively refresh the room.
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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.
COOL BLADELESS FAN FROM CHINA!!!
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.
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 her help in work area air is being pumped.
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.
Bladeless fan
Principle of operation
In a bladeless fan it was used technical principle turbine operation. 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.
Main advantages
A bladeless device has many advantages over a conventional fan. It is ideal for home use and office premises. The devices differ as follows positive characteristics:
All these devices are equipped 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.
Criterias of choice
The “Air Multiplier” is distinguished not only by its positive characteristics, but also original design. With its fancy shape it will decorate any room. Based on the installation method, they are divided into three types:
Wall-mounted devices are stationary type, and the other two are portable devices. Most often, manufacturers of such equipment provide installation of fans in two mounting options: on the wall and on the table. They are supplied with a bracket with dowels.
Consumers are now offered many models that differ in price and functionality. Before purchasing, you need to pay attention to the characteristics of the device and its noise level during operation.
How to make a DIY safe fan
The operating efficiency is affected by the ring radius of a bladeless fan. For larger rooms, you should choose models with a larger ring. The amount of flow and electricity consumption will depend on the power of the “air multiplier”. For a small apartment or house, it is enough to buy a medium-power device. If you choose it for a large office, then you should buy a unit that can move a large volume of air.
It is recommended to pay attention to the body of the product so that it is of high quality and does not have unpleasant odor. For connoisseurs of comfort, it is advisable to give preference to models with a wide range of adjustment parameters. Availability of a control panel with a convenient button system makes it easy and simple to manage household appliance .
Features of application
“Air multipliers” are quite common these days. They are installed in houses and apartments, offices, hospitals and other institutions. They gently distribute air flows, but, in addition, they are also capable of humidifying, cooling or heating the air. The range of humidity level settings will depend on the model, so each user has the opportunity to choose for himself suitable option products.
Only expensive models are equipped with heating and cooling. Options are offered to purify the air from fumes, smoke and other harmful impurities. Now you can buy products from world brands that will perform the functions of real air conditioners.
In this tutorial we will make a bladeless fan using PVC tubing, a plastic container and a sheet of fiberglass.
For this project, special thanks to the guys from the DYI King channel on Youtube, who were inspired to create a safe fan. But the best thing about this bladeless fan is that, unlike most homemade fans, the project does not require the use of 3D printing, and the total cost can be less than $10.
Below in the video you can see the entire process of creating a fan.
Step 1. Tools and materials
The tools and materials needed for this project are very easy to assemble and are all pictured above. The basics for this project are a set of 6.5" and 3.5" PVC pipes, a plastic container or bowl, and a 3mm fiberglass sheet.
There is no need for a 3D printer as is used in most DIY fan projects. Moreover, we used a miter saw to make most of the cuts as it made the job more precise and easier when the same job can be done with hand saw and some patience, but then you will need expensive tools to make a neat bladeless fan.
Step 2. Working principle
Unlike the name of the device, which is a fan without blades, this thing actually has a fairly high-speed blade inside the main body. You can see the operating principle of such a fan in the figure above.
In addition, a bladeless fan provides closed blade control and then airflow is directed through a closed duct body, replicating the structure of a conventional bladeless fan housing. This design offers an excellent level of protection for children.
Step 3. Making the main body
First you need to make the main body and for this you can use a PVC pipe. The main outlet is made of 6" diameter PVC pipe, which is 4" wide to form the outer air outlet casing.
To form the air pocket inside the main air outlet, we use a conical shaped bowl that fits perfectly over the 6″ PVC pipe and its collar sits on the edges of the pipe - see photo above. Cut the bowl 1" above the bottom so it forms a nice conical collar inside the main outlet casing that allows the air to rotate evenly inside the outlet cavity before leaving it.
Step 4. Inner casing and base
The internal air outlet clamp is made of PVC pipes 5 inches in diameter. This pipe creates a narrow opening that is almost 0.5 inches wide to distribute air evenly from the cavity/air outlet. Three parts, namely an outer 6-inch PVC pipe, a conical inner casing made of a plastic bowl, and an inner clamp made of 5-inch PVC pipe, together form the air release casing.
To form the base, use 3.5" PVC pipe cut to 5" high. To ensure that the base fits perfectly into the air outlet body, we cut one end of the base pipe in a curved shape (cut the bend using pre-applied electrical tape), and mark the outline with 6-inch PVC pipe. The pipe is then cut using a jigsaw and then sanded down to fit the outer 6″ pipe perfectly without any gaps in between.
Step 5. Air intake hole
Before gluing the base to the main body, we drill a 3-inch diameter hole in the 6-inch PVC pipe, which will be the passage for air to enter the main body and then into the outlet hole. The hole is made using a hole saw.
The base is then glued to the outside of the air outlet using super glue. Since the base pipe is perfectly shaped to sit on top of the 6-inch PVC pipe, the superglue makes a very strong connection between the two pieces.
Step 6. Air outlet ring
The air outlet ring is made of 3mm thick fiberglass sheet, which serves as a connection between the inner half and the outer half of the main air outlet. The ring was made using a jigsaw.
Step 7. Drawing
Since most of the body parts of the bladeless fan are ready, you need to paint them to make them look neat and perfect. We paint everything white using spray paint, except for the fiberglass ring, which is protected from the paint with duct tape.
The end result is very nice and the blue fiberglass sheet looks fantastic against the pristine white background.
Step 8. LED strip
To make the design more attractive and elegant, add a 12V LED strip on the inside of the air outlet at the end where the fiberglass sheet will be glued to the inner air outlet sleeve. The light strip is cut to the required length. The tape has a sticky side and adheres when removed protective coating from the back of the tape and then sticks to the PVC body.
When the fan turns on, LED Strip Light illuminates the back of the air outlet and thus produces a very cool visual effect by spreading blue light.
Step 9. Gluing all the parts
Once the paint is dry, glue all the pieces together to form the main part of our bladeless fan using Super glue, who seems to hold everything tightly.
Step 10. Install the fan
Behind each bladeless fan is a fan with blades. So to drive our fan, we need to use a 12V high speed fan direct current, which can be taken from an old computer. More specifically, the tutorial is about a fan from a server, which is much more powerful than a regular PC fan. Therefore, we highly recommend using this type of fan.
The fan is mounted inside the base directly below the air outlet housing using four wood screws to hold the fan securely in place. The fan is installed in such a way that it pushes air upward and thus we need the fan to be quite stable.
Step 11: Air Intake
A pair of air intakes are located just below the server fan on both sides of the base pipe, i.e. base pipes. These intake holes allow air to be drawn into the base.
To prevent someone from accidentally injuring their fingers by inserting them into the base of the fan, we glue a metal mesh on both holes. The mesh is first painted black matte colour and then glued inside the base using hot glue.
Just recently, no one could have imagined that achievements in science would reach the limits of perfection so far. This is especially true for new products in the field of household appliances. The product range is so large that the consumer does not have to be content with something ordinary. Everyone tries to choose the best modern model equipment, especially if it has an updated design.
The most popular new product on modern market A household appliance can be considered a bladeless fan. This invention not only helps to refresh the room, but is also considered an economical type of technology in terms of energy consumption. What is the operating principle of such a device?
How a bladeless fan was created
This type of device, a bladeless fan, was invented by the famous English scientist James Dyson. His goal was to invent a device that could work without blades and without any vibration. In addition, the scientist managed to develop a technology that could increase the blown air up to 15 times. The creation of a device without blades went through a very difficult path, and the technology could only be perfect after long work by engineers led by Dyson. About 4 years were spent on the miracle invention. As a result of developments, innovators still managed to optimize the ventilation ring.
The operation of the fan is driven by a simple electric motor, which has a power of 40 W and is located on the bottom of the device. The motor is equipped with powerful neodymium magnets that prevent the formation of dust. The speed of air flow can be easily adjusted using a rheostat switch, which is impossible to achieve with conventional paddle devices.
Dyson managed to create a safe fan without blades, which was able to displace conventional fans. After all, this type of device is very convenient and unpretentious to use.
How does a bladeless fan work?
There are many small holes on the leg of the bladeless device itself. They provide not only cooling of the device, but also filter the air itself. Such a turbine pump is capable of pumping up to 20 cubic meters of air per second, which is almost impossible for a conventional fan.
The air mass passes through the distribution ring and turns into a dense contour with the middle inside. The ring is equipped with an empty cavity and a slot through which air under pressure passes. The speed of the air leaving the ring is 90 km/h. At this speed, one air flow meets another, which creates an element of air flow compensation. This process allows you to increase the outgoing air tens of times with its uniform movement.
Bladeless fans, of course, have many advantages over conventional fan models. Their stylish design can serve as decoration for anyone modern interior both at home and in the office. Having enormous power and high safety, the device without blades It also has a reasonable price compared even to cheap air conditioner models. In addition, such a device refreshes the room well and works almost silently, which makes it simply irreplaceable.
The safety of a bladeless device is amazing. This device completely lacks moving parts in the form of blades, which allows it to be used freely even near small children. In addition, the device has amazing power, thanks to which the air is blown out more intensely and the room is cooled faster. The operation of the bladeless fan can be easily adjusted using the control panel, which creates even greater comfort.
The fan without blades conveniently rotates in different directions, so the coolness spreads throughout the free space. Models of such devices have a powerful platform, which ensures their stability. Even The control panel is attached to the body to avoid its loss.
In short, bladeless fans have the following advantages compared to conventional models of such devices:
In addition to most advantages, bladeless devices also have some, albeit not quite significant flaws:
- Presence of noise and vibration. When the turbine operates silently, the release of air flow is accompanied by a strong hum.
- High cost compared to conventional blade fans.
So, bladeless fans are distinguished by their operating efficiency, modern design and practicality. That is why they are many times superior to traditional models and have already begun to enjoy a certain demand in the household appliances market.
Modern people have long understood that in the rooms where they are constantly located, it is necessary to always maintain a good atmosphere. Workplaces and living rooms should not be too stuffy, since if a person does not have enough air, his well-being may deteriorate significantly. He will feel quite weak and lethargic. He may even begin to have a severe headache. And to avoid all these health problems, people install special climate control equipment in their premises. And if previously they could use “rotating” fans and air conditioners to maintain a comfortable atmosphere, now they have a slightly larger choice. And they can purchase more modern technology to improve the indoor climate. For example, they can buy a fan without blades for themselves.
What exactly is interesting about this device? It provides excellent air circulation in the rooms where it is installed. And this despite the fact that it has no blades. This climate control technology is quite original design. Therefore, this fan can be not only a means to improve the atmosphere at home or at work. It can also serve as an unusual decorative element. Its design will fit perfectly into any modernist interior, and is also suitable for rooms decorated in a classical style.
But still, what exactly are the advantages of a bladeless fan:
– excellent performance. By purchasing this unit, you can maintain a comfortable climate in rooms of different sizes. You just need to choose a fan whose size and power will correspond to the area of your living room or office. This technique can be tabletop or floor-mounted. Small fans are convenient to install on desks or bedside tables. Large devices will be able to “disperse” the air in spacious rooms;
– Conventional fans with blades and mesh may be contraindicated for use by some people. Dust often accumulates in them, so it is not advisable for allergy sufferers to keep them in their premises. Modern fans that do not have blades are completely free of this significant drawback. In addition, their surface is dust-repellent. Therefore, dirt particles do not settle or accumulate on them;
– moderate energy consumption. Electricity costs for owners of this climate control equipment will not increase. They are comparable to those required for a conventional “spinning” fan.
The world-famous British innovator James Dyson, the inventor of a bagless vacuum cleaner, a waterfall flowing upward, and a number of other useful and useless things, managed to surprise the world once again. He launched a stylish indoor fan without a rotor or blades. At first glance it is a pure mystery. However, the author does not make a secret of the device.
Sir James Dyson has created a fast water machine and a garden cart with a ball instead of a wheel. The general public are more familiar with cyclone vacuum cleaners, usually not suspecting that it was Dyson who invented the first such device back in the late 1970s. Now many people produce similar equipment. But masterful handling of air flows has become the hallmark of the Dyson company, founded in 1993.
It is not surprising that the sensational new product from Sir James again “conjures” the air. It only became clear at the last moment. And at first the British didn’t even say what region their next design was from. Dyson released this intriguing teaser shortly before the premiere.
Representatives of the test group clearly expressed surprise and interest. Many incredulously extended their hands into the ring, trying to uncover the “deception.” Yes, the ring itself was left behind the scenes in the video. In the pictures below you can see what that wow effect test actually looked like.
"Oh my God!" - "How it works?" - "I can not explain!" (Dyson footage).
This fun device is called the Dyson Air Multiplier. The inventor came up with it in order to rid the table fan of a number of disadvantages: “ragged” turbulent flow, which is not always pleasant when it hits the face, as well as rotor blades.
The latter, firstly, are dangerous for children (kids may well stick their fingers between the bars of the protective grille), and secondly, they accumulate dust (to properly clean them you have to disassemble that very grille). In the Air Multiplier, there is no visible rotor, nothing rotates at all (from the outside, anyway), and wiping dust from such a fan is as easy as shelling pears.
Those who have tried the new product report that the “toy” makes a lasting impression at first, especially if you stick your hand into the ring. It is felt that the main flow is formed somewhere at a short distance in front of the device, in some kind of “focus” (photos gizmodo.com, engadget.com).
The system is based on a plastic ring, the cross-section of which is similar to the profile of an airplane wing. On its inner surface along the entire perimeter there is a gap only 1.3 millimeters thick. A small but very efficient air turbine (driven by a 40-watt electric motor) is hidden at the base of the device.
The device takes air through the grate at the bottom and pumps it into the cavity inside the ring. The air comes out of the narrow gap at tremendous speed and begins to smoothly bend around the internal airfoil. In this case, an area of rarefaction is created opposite the center of the ring, into which air is drawn from the side farthest from the user. This flow is quickly drawn into the general movement. Moreover, the current also picks up some air from the outside of the hoop.
Dyson is introducing three “Multiplier” models to the market at once, differing in color and ring diameter (10 or 12 inches, that is, approximately 25 and 31 centimeters). All three versions cost 200 pounds ($316) in their homeland.
Like most table fans, the Air Multiplier can regularly rotate left and right within 90 degrees, and you can also adjust the angle of the jet to the horizon. The noise from the device is comparable to the buzzing of modern, not very loud vacuum cleaners or hair dryers (photos by Dyson, gizmodo.com).
The turbine (its speed can be smoothly adjusted) supplies over 20 liters of air per second into the slot. And at the outlet of the device, the volume of air increases 10-20 times! This is the “multiplying effect” of Air Multiplier.
The speed of the total flow can reach 35 kilometers per hour. At the same time, at the exit from the gap, a thin layer, carrying the rest of the air with it, accelerates to 88 km/h.
Thanks to the wing shape and profiled slot, an average of 15 times more air is sucked into the ring than passes through the turbine hidden at the base of the fan (Dyson illustrations).
In some ways, this is a further development of Dyson’s “Air Blade” - an ultra-high-speed hand dryer. Dyson himself says: “Noticing that when the “blade” works, it attracts a little air from the side, we began to think about how to apply this effect in practice. And they decided to create a device for generating air flows without a traditional “impeller”. Three years of development, then more tests, and now the product is ready.”
The drawings and section reveal where the “fan” itself is hidden, that is, the impeller. However, this tiny turbine with cleverly curved blades, designed on the model of aircraft turbines, bears little resemblance to the simple “propeller” usually used in such technology (illustrations by Dyson, pocket-lint.com, dailymail.co.uk).
Dyson engineers racked their brains a lot to get the flows to combine and “stretch” as needed. Hundreds of prototype tests made it possible to obtain a verified profile with a precisely calculated angle at which the “starting” high-speed flow emerges from the slot. But the result was excellent.