The bladeless fan is a unique device that amazes with its design. Such a unit does not have blades or rotating elements visible to the eye. Therefore, it is completely unclear to many how this device works and how it moves air masses. In fact, the operating principle of such a fan is not that complicated. To do this, it is enough to study its design features.
The device works on the principle forced ventilation, which was invented in ancient times. This is how the ancient Egyptians used fans to create comfortable conditions for the pharaohs. At that time they did not understand all the scientific subtleties of the temperature decrease when a gas flow flows around a body, but they successfully used this thermodynamic phenomenon. Today, bladeless new products are based on the operating principle of the turbine of modern jet aircraft.
Species
A bladeless fan can be of two types:
- Desktop.
- Floor.
The floor-standing version is distinguished by its large dimensions. In most cases this is a fairly powerful fan. It is used to cool a large area. In many cases, such fan models are equipped not only with a cooling function, but also with a heating function.
Desktop models stand out for their compactness. Thanks to this, they can be easily placed on the table. With the help of such a fan you can create a fairly comfortable environment in the workplace on a hot day in the absence of air conditioning. In addition, desktop models have a very stylish and unusual design. They can have a left-right rotation function and remote control using the remote control.
A number of models are equipped with a device designed to humidify the air. These types of devices have a special reservoir in the fan housing into which water is poured. There are also mini fans that you can take with you on the road. Such devices can be powered by a cigarette lighter and used instead of an air conditioner.
Device
The main elements of a fan without blades are the following parts:
- Ring diffuser.
- Engine.
- High speed turbine.
- Base.
The high-speed turbine, in which the engine is mounted, is installed at the base of the unit. Thanks to the operation of the turbine, air movement begins in the device. To reduce the level of sound produced, the engine has a special Hemholtz chamber that captures and dissipates noise. This makes the fan seem quite quiet.
There are many holes made in the base body to suck in air. On the top of the body there is an aerodynamic ring, which is equipped with an annular diffuser. It has many holes through which air is blown. The ring itself may be the most different shapes: rhombus, oval, circle, heart and so on. It all depends on the design ideas of the designer of the manufacturing plant.
Operating principle
The bladeless fan operates using electric motor. Air is sucked into the turbine through small holes that are located at the bottom of the fan stand. Air masses after passing through the turbine exit through small hole in the center of the ring and then spread along the contour. An air stream is created that flows around the ring from inside its rim. Air masses cover the rim and create negative pressure inside the ring of the device along the streamlined surface.
As a result, this leads to the fact that air masses located next to the fan begin to be drawn into the center of the ring into an area of discharged pressure. As a result, a powerful flow is created at the output of the ring, which can be amplified up to 15-20 times. This aerodynamic effect allows you to easily move air masses and cool the room. The speed of the turbine unit can be controlled, so it is possible to set the required air flow rate. At the same time, with the help of a fan without blades, a fairly dense and comfortable flow of refreshing air masses is created. The operation of the device itself is unobtrusive and almost invisible.
Application
The scope of application of this fan is quite extensive - these include any municipal and public institutions, hospitals, sanatoriums, kindergartens, cottages, dachas, numerous offices, houses, apartments and so on. The only exceptions may be baths, saunas, bathrooms, and swimming pools. Despite the absence of external rotating parts, it should only be used by adults; you should not leave such devices turned on alone with small children.
In addition to the gentle distribution of air flows, a bladeless fan can humidify and even heat the air. However, this is only if the device has such functions. Similar units in most cases they are supplied with a control panel where you can install required temperature and percentage of humidity. The regulation range is determined by the specific model. The cheapest devices usually only have a cooling function. Expensive models may even have an air purification function. harmful impurities, for example, from cigarette smoke.
How to choose a bladeless fan
Choosing a bladeless fan can be not so easy. On current moment time, the market for such equipment is replete with numerous variants of models from the most different manufacturers: these are Dyson, Orion, SUPRA, Bladeless and many others.
- First of all, you should proceed from your personal needs and financial capabilities.
- Before purchasing a device, you should familiarize yourself with its characteristics and find out the noise level. This is an extremely important parameter, because it will directly affect the comfort of use. The average noise range of such devices is 40-60 decibels and above.
- The radius of the ring affects the efficiency of its use. For large premises It is recommended to choose devices with a larger ring.
- Power determines not only the strength of the flow, but also the amount of electricity consumed and the level of noise emitted by the device. For an apartment or small house A medium power fan will suffice. However, for a large office you should select a fairly powerful device. For such premises, it is recommended to select units that are capable of moving approximately 250 cubic meters per hour.
- For everyday use, a 90-degree rotation angle of the ring is sufficient, but if desired, you can purchase a device with a rotation angle of up to 360 degrees.
- Pay attention to the quality of the plastic and the absence of unpleasant odors.
- If you value comfort, then it is recommended not to skimp and purchase a model with a wide range of adjustment parameters. The presence of a control panel with a clear button system will make use more convenient.
For recent years appeared large number new products household appliances. Consumers are offered a varied assortment modern products and often in updated design. The most popular is a bladeless fan, which operates in an economical mode and can effectively refresh the room.
- floor;
- wall;
- desktop
Show all
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, functionality technology. When developing a special fan without blades, more than 4 years were spent modeling a ring that can effectively pass 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
Operating principle
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.
Key Benefits
U bladeless device there are many advantages compared to a conventional fan. It is ideal for home use and office premises. The devices differ as follows positive characteristics:
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 come with various options where you can choose desired mode work. 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. Price modern models 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.
Selection criteria
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 indoors large sizes 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 an apartment or house small area 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 convenient system buttons allows you to easily and simply control your 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 equipped with heating and cooling expensive models. 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 pipes, 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 main thing for this project is a set of pipes from PVC diameter 6.5 and 3.5 inches, plastic container or bowl and 3mm fiberglass sheet.
There is no need for a 3D printer as is used in most DIY fan projects. Moreover, we used 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 (we 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 sandpaper to fit the outer 6" pipe perfectly without any gaps between them.
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 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 to inside 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 illuminates back 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, we glue all the pieces together to form the main part of our bladeless fan, using super glue, which 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 DC, 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 metal mesh on both holes. The mesh is first painted matte black and then glued inside the base using hot glue.
Innovations quite aggressively and intrusively invade our lives. The happy exception was the appearance on the market household appliances"air multiplier". A striking innovative device, a fan without blades, turned out to be extremely comfortable to use, efficient and economical, and it easily won the sympathy of consumers.
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. There has been a long journey of research and development, intellectual and financial costs, 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 simple ring, in the shape of a heart, an apple, a rhombus, 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 work 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.
Fan without blades: operating principle
The device uses technological principle air turbine. Located at the base of the device, the turbine, through the technological holes in the base housing, sucks in air from the outside and supplies it through a narrow slot into the annular diffuser. The specially adapted profile of the diffuser ring increases the efficiency of the pressure difference, resulting in air being pushed out with force due to the aerodynamic effect. At the same time, the air surrounding the diffuser ring is drawn into the resulting flow; due to this, the working flow increases by 1.5-2 dozen times.
Author unusual design shared that he took his idea from the working principle of a jet engine and used it to create a fan without blades. The operating principle of this device is figuratively called an “air multiplier”. As a result of innovative developments, an economical, safe and stylish design was created.
As a result, it turns out that if a bladed fan produces vortex air flows and intermittently blows working area, causing discomfort and draft, a fan without blades creates a dense monotonous comfortable refreshing flow, its operation is unobtrusive, almost unnoticeable.
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.
Quite recently, rather strange devices began to appear on sale, having the functions of a regular fan, but without the usual blades. A standard device of this type looks like a ring mounted on a special stand. In this case, the air flow comes directly from the middle of such a ring, which seems fantastic and even magical. For many, such a fan causes bewilderment, while others consider its operation simply supernatural or a scam.
In fact, a fan without blades has a rather simple device, although its operating principle is based on latest developments in Aerodynamics and Engineering. The fact is that the ring installed on the cabinet is hollow inside, and a special hole is made along its inner perimeter. A fan without blades has a turbine inside the cabinet, which supplies air pressure inside the ring, and it exits through an opening that has such aerodynamics that its flow is directed in a certain direction, namely through the circle itself. Thus, directional masses are created, which, in turn, capture air from environment, creating a fairly powerful flow. Therefore, such a device is often called pressure."
It is worth noting that the air flow obtained using such a device flows evenly, and not in portions, as when 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 required area under constant air pressure, which will be much more efficient at the same energy costs.
Thanks to its design, a fan without blades allows you to produce an air volume 15 times more than a regular one. At the same time, its air pump operates almost silently, which is also very big advantage. Many models of such devices can heat the air, allowing the device to be used 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 to a light breeze; it allows you to feel like you are on the seashore. It does not bother you with its constant noise, so using such a device is a pleasure. Also, a fan without blades does not collect dust. This has a positive effect on health and will make it possible for people suffering from allergies to use it.
Thus, bladeless fans are the latest home organization devices that are not only very efficient, but economical and safe. Moreover, the price for such air is almost the same as for an electric fan heater. This makes such a device accessible to almost everyone, and the remote control will allow you to enjoy a gentle air flow from anywhere in the room.
