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.
Kinds
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 enough 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 can be of very 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 is powered by an electric motor. Air is sucked into the turbine through small holes that are located at the bottom of the fan stand. The air masses, after passing through the turbine, exit through a small hole in the center of the ring and then spread along the circuit. 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. In most cases, such units are equipped with a control panel where you can set the required temperature and humidity percentage. The regulation range is determined by the specific model. The cheapest devices usually only have a cooling function. Expensive units may even have the function of purifying the air from harmful impurities, for example, cigarette smoke.
How to choose a bladeless fan
Choosing a bladeless fan can be not so easy. At the current time, the market for such equipment is replete with numerous variants of models from a variety of manufacturers: Dyson, Orion, SUPRA, Bladeless and many others. There are cheap models starting from several thousand rubles and very expensive ones that are made to the highest standard and have many functions. Their cost can be up to 100 thousand rubles and more.
- 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. Average noise range similar devices is 40-60 decibels and above.
- The radius of the ring affects the efficiency of its use. For larger rooms, 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.
It so happens that our country is located in a temperate climate zone, but is it as “moderate” as its inhabitants would like? Cold, harsh winters and hot summer days - this is the “moderation” of the climate in Russia. Fortunately, the periods of peak thermometer readings do not last long, so buying expensive mounted equipment is not always advisable. And here a device such as a fan is a great salvation. Small in size, mobile - it will act as a savior on a hot sunny day, and when the need no longer exists, it will move to the closet shelf. Today, fans are not just a motor, blades, and a stand as before. Models can differ radically in design and method of operation, the number of additions and functions increases, so choosing a fan becomes not an entirely simple task for the buyer.
Fan types
Depending on the installation location, they can be divided into desktop, floor and ceiling. You should choose a model based on the area of the room and the desired placement.
Table fans – compact in size and mobile, for greatest efficiency they require installation on elevated objects: table, shelf, chest of drawers, etc. If desired, you can easily change the location or rotation of the fan, since desktop models are quite lightweight. The disadvantages include low power and a small service area, but for small rooms this option is the most budget-friendly and convenient.
Floor fans – often look the same as desktop ones, but have more impressive dimensions and a high stand. The stand allows you to adjust the height of the fan, due to which you can configure the device so that the air flow hits the desired location. Floor fans are not as mobile as the previous type, however, they most often have a rotating mechanism, which means there is no need for constant adjustment and reinstallation. Thanks to its size floor structures provide uniform airflow to every corner of medium-sized and large-sized rooms, as a rule, they have a larger impeller size and power.
Ceiling fans – the most powerful, allow you to cool large areas, therefore they are used in industrial, commercial, office premises. Due to their high cost, ceiling fans are becoming a thing of the past, giving way to air conditioners. Ceiling models are combined with light sources, vary in design, and are made of wood, plastic, and metal. The design is completely stationary and requires installation; this device cannot be moved from room to room or put away for the winter. It is worth noting that ceiling models are quite common in hot countries where the need for cooling is present all year round.
Fan operating mechanism
Not so long ago, there were fewer fan designs. Radial and axial fans They are used not only in everyday life, but also as cooling elements for most equipment, both digital and household.
Axial design consists of an impeller (blades), a motor and a housing. The air is forced through the screw and passes along the axis of rotation. The engine rotates the axis, which in turn moves the lionfish. The blades are made at a certain angle, due to which the air moves along the axis and twists along the way. Thanks to the simple principle of operation and ease of manufacture, axial fans have received wide use. The advantages of the mechanism include low energy consumption, the ability to install in any position, long service life, simple maintenance, and long service life.
Radial fans – have more complex design Unlike axial ones, their cost is accordingly much higher. They are made in the form of a column, inside of which there is a rotor with blades. Air entering the rotor moves radially with the help of centrifugal forces and is pushed out through holes in the column. The main difference between the radial mechanism is the pressure, that is, the large difference in pressure when air enters and exits. Thanks to the design radial fans take up less space, fit better modern design and less noisy compared to axial ones.
Not long ago, manufacturers introduced a completely new fan mechanism without blades . This, of course, makes the design safer, ideal for installation in a children's room or in a room with animals. The cost of such a technical innovation is much higher than that of its predecessors. The appearance makes you wonder on what principle the device works, because it does not have the usual blades, only the body and the ring from which air comes. In reality, all the elements are located inside the housing, namely a compact and powerful turbine that does all the work. The aerodynamic ring has slots through which the air pumped by the turbine enters.
Adjustable
Manufacturers present models with the ability to adjust speed, height, and turn the fan housing on or off. All of the above characteristics apply to various types designs and add convenience to the user.
Speed adjustment – present in almost every fan model. Depending on the room temperature and weather conditions the buyer gets the opportunity to adjust the blowing power. The function is very convenient, since operating conditions are always variable. Let's say that when you are in a room, it is not always advisable to set the maximum power, there is a high probability of catching a cold, and your eyes get tired and dry quickly from the strong airflow. If there are no people in the room, it is enough to turn on the high power to make the climate as comfortable as possible.
Adjustable stand height and top tilt – it is not always possible to install the fan in such a way that the air flow hits directly the desired object. Height adjustment will allow you to configure the fan as convenient for the user. If the structure is located on an elevated plane, then you can set the minimum height, and set the maximum height on the floor. Another important addition to mobility is adjusting the tilt of the fan “head”. The feature allows you to adjust the airflow at an angle up or down without having to adjust the height of the stand. When choosing a fan, it is important to pay attention to the stability of the stand, the quality of the fastenings and the ease of fixation in various positions.
Fan rotation – the function allows you to increase the airflow area; in large rooms or rooms where several people are located, it can be called indispensable. The greater the angle of rotation, the larger the area the airflow will cover, however, the air flow in such conditions is periodic, you will have to wait for the fan “head” to return to its original position. On the other hand, the air flow with the rotation function can be set to maximum, the likelihood of hypothermia or catching a cold is reduced significantly.
Additional features
Today, manufacturers are introducing useful features into almost all devices to increase competitiveness; fans are no exception in this case. Each of the features increases the cost of the device, but also brings its share of ease of use.
Timer - undoubtedly, useful feature, will allow you to set the time to turn the fan off or on. If you have a timer, you can set the time at which the fan will start working, for example, an hour before you come home, or turn it off an hour after you go to bed. Thus, a comfortable temperature will accompany the user all the time and there will be no need to wait for the fan to gradually cool the room. However, you should be careful and do not leave the fan in operating mode for a long time to avoid overheating or short-circuiting, even with a timer.
Humidifier – a rare feature today, this is most likely due to the fact that in the summer the air is already quite humid and the humidification function is not suitable for every region and apartment. Devices that combine blowing and humidification are much more expensive; in some cases, it is more advisable to purchase two full-fledged devices.
Remote control – it’s no secret that the modern generation is accustomed to pressing buttons and unnecessary actions begin to irritate; many devices are equipped with a control panel. Fans with a remote control are easy to use; for people with disabilities, a remote control is more a necessity than a whim.
Every day more and more new devices appear, which are created with the aim of making human life easier. One of these is the bladeless fan. This unit is an innovative product and belongs to climate control devices. It turned out that the appearance of this device on the market was appreciated by buyers because it is safe, economical and easy to use. In this article we will look at how a fan without blades works, its types, advantages and disadvantages.
Operating principle of a fan without blades
The design of these devices does not give a complete picture of how it works. In appearance simple design: a ring is attached to the supply through which a powerful air flow passes. Let's look at the operating principle of a fan without blades.
The air passes through the air intake and exits at high speed with reverse side. The aerodynamic design creates low pressure to move air flow at the inlet. The turbine built into the footrest creates a fast air flow at the outlet. This unusual design makes it much more efficient than a fan with blades.
This device is safe because it has no rotating parts, so you don't have to worry about leaving it where children can see it. If there are pets at home, then nothing threatens them either.
On the footrest there is a mechanism with which the ring can be rotated on the sides by 90 degrees, and the angle of inclination can also be changed by 10 degrees. The comfort of using a bladeless fan is increased due to the 360-degree rotation option. Thanks to this, the zone of distribution of cool and fresh air increases. Control is simplified by the remote control.
Bladeless fans pass about 500 liters of air per second. When exiting, the air is distributed evenly. When creating this device, the developers took as an example the work of a conventional jet engine airplane.
Types of bladeless fans
This fan ensures uninterrupted air flow. Comfortable atmosphere The device is provided with a regulator that allows you to control and change the air pressure. In addition to operating efficiency, a fan without blades boasts an interesting appearance and can fit into any interior. There are several types of bladeless fans:
- Tabletop - the most common, does not require much space and can decorate any room. These models are usually no higher than 55 centimeters, and the diameter of the ring does not exceed 30 centimeters. You can use this fan model to provide the necessary climate in one room or small office.
- Floor-standing - can be a replacement for a low-power air conditioner. It can be placed anywhere in the room. Devices are produced in various power and can be programmed for blowing and rotation speeds. Design - oval and round.
- Mini fans are very mobile and can be used in a car as an air conditioner.
Pros and cons of bladeless fans
- Stability – the device does not fall due to the stable stand where the motor is installed.
- Safety – there are no rotating elements, so you can’t get hurt.
- Productivity – the necessary climate is created in a short period of time, and the cooled air is evenly distributed throughout the room.
- Economy – low electricity consumption, so the “air multiplier” can work throughout the day even in summer.
- Attractive appearance.
- Does not dry out the skin.
- Easy to use - easy to clean due to the fact that there are no small parts in the device.
- Adjustable air flow power.
- Affordable price.
- Noise during operation – minimum 40 dB;
- Expensive.
If you still don’t know what device to buy in order to refresh your room and relieve the heat in the summer, then we recommend paying attention to a bladeless fan. This device will cope with the task no worse than an air conditioner, but at the same time it costs much less and will fit into any interior due to its design.
With the onset of heat, we remember fans, the simplest and most accessible human inventions for freshening the air. Classic design The fan 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 propose 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.
Operating principle of a bladeless fan
The main difference between a bladeless fan and a conventional one is the changed direction of the ejected air flow. This is achieved due to the fact that the engine and impeller are placed vertically and hidden in the base, which is equipped with grilles. Through them, air flows pass into a frame placed above the base and equipped with slots around the perimeter for ventilation.Materials, tools for a bladeless fan
To assemble this cutting-edge household gadget, we will need the following materials:- Sections of PVC pipes with a diameter of 150, 125, 90 mm;
- Quick-drying glue for plastic, such as superglue;
- A small piece of plexiglass or plexiglass of blue color;
- Server cooler YW880, frame width 60 mm;
- White aerosol paint, 1 can;
- Soft section metal mesh with cells of about 10 mm;
- Rheostatic speed control board, toggle switch;
- Solder, flux, thermal casings, self-tapping screws;
- Line segment LED strip, length - about 50 cm;
- Power supply (adapter) 12V/2 A;
- Insulating tape.
- Miter saw or grinder (angle grinder) for cutting pipes from PVC pipes;
- Jigsaw for cutting curved lines;
- Drill or screwdriver with a 50-60 mm crown cutter;
- A set of drills of various diameters;
- Soldering iron, screwdriver, scissors, pliers, hot glue gun;
- Painting knife.
Work order
Preparing plastic pipes
Take a segment PVC pipes with a diameter of 150 mm and trim it, aligning the edges. Mark a fragment about 100mm long and make a cut miter saw or grinder (angle grinder).
The edges of all pipes must be sanded to avoid burrs, unevenness and to improve the fit of the edges for adhesive joints.
The next step is to select plastic container, which will fit tightly onto our section of pipe. We cut off the bottom of it with a painting knife, and use superglue to secure it to the top of the pipe.
Then we take a pipe with a diameter of 125 mm and cut off a pipe 90 mm long from it.
The next one will be a pipe with a diameter of 90mm, which we will also cut, like the previous two. This is the base of our fan. The length of the segment is 120-130mm.
Basic plastic parts ready. You can check how they will fit together by placing them in their places.
The fan frame sits perpendicular to the base, so the 90mm pipe needs to be slightly prepared by cutting off its edge according to the circumference of the frame. We mark it with a pencil, you can cut it with a jigsaw or the same grinder.
Unevenness in a curved cut can be smoothed out with sandpaper, removing burrs at the same time.
Using a core cutter with a diameter of 50-60mm, a drill or a screwdriver, we make through hole in the middle of the largest pipe. This will allow air to flow through the base and into our frame. We fix our base with superglue.
In order to close the fan frame, consisting of two sections of pipe different diameters, on the smaller of them a plug is glued to one end. We make it from a sheet of plexiglass or blue plexiglass.
Having first marked the larger circle and then the smaller one, we cut off the plug ring.
Now it can be attached with superglue to the smaller pipe of the frame.
Using spray paint white and electrical tape as masking tape for plexiglass, we paint the plastic parts of our fan.
After the paint has dried, you can glue a piece of LED strip onto the pipe bigger size from the plug side. Don’t forget to immediately solder the contacts for LED backlight, and bring them to the base.
We fix both pipes of our frame with superglue.
Electrical part
We begin to prepare the electrical filling of our fan by soldering the cooler contacts. It is better to take the wires with a reserve so that it is convenient to work with them when connecting the control board and toggle switch.
You can use a soldering iron to make mounting holes to securely secure the cooler in the base housing.
We fix the cooler and drill two ventilation holes in the base opposite each other. This can be done with the same crown cutter.
We close these holes with fragments of metal mesh, pre-cut to size.
Glue the mesh fragments with a hot glue gun.
We solder the contacts of the toggle switch and the power socket. We cover the exposed contacts with heat-shrinkable casings, heating them with a lighter.
Now you can make holes for the toggle switch and power socket, and secure them to the fan base housing.
Traditional design ceiling fan well known. Usually its blades whistle through the air under the ceiling of the room, directing the air flow downward. Being directly under the fan, you can enjoy the “light breeze” and risk catching
The traditional design of a ceiling fan is well known. Usually its blades whistle through the air under the ceiling of the room, directing the air flow downward. Being directly under the fan, you can enjoy the “light breeze” and risk catching a cold at the same time. But in other places in the room the effect of the flow is practically not felt.
Inventor Nik Hiner, together with like-minded people from the company Exhale Fans, offers a product that does not have these disadvantages and has an unusual innovative design.
In the new design, everything is turned upside down. No, the fan is still mounted under the ceiling of the room, but it does not have any blades whistling overhead, and it does not blow out the air flow, but draws it in.
Instead of blades, flat disks rotate, creating laminar (unidirectional) air flows moving along the surface of the ceiling and descending down to the floor along the walls of the room. As a result, air entering the fan from below circulates evenly throughout the room, mixing the temperature layers. Unlike a conventional blade fan, a room completely enveloped by laminar flow eliminates areas where the temperature deviates significantly from the average.
The design does not have rotating blades, which determines a fundamentally lower noise level during operation. In addition, a low-noise electric motor is used to rotate the circles, which practically reduces the overall noise level to a minimum. Engine direct current can rotate at six different speeds, and is controlled by a wireless remote control. Of course, the undeniable advantage and difference between the new fan and its bladed counterparts is its appearance, which fits perfectly into almost any interior.
The idea for a bladeless ceiling fan came to Hiner while he was studying the design of a Nikola Tesla turbine. Hiner made the first attempt to implement an unusual design in 2005. The following years were spent adapting the design and producing a series of prototypes before the inventor settled on the current design.
Today the fan is almost ready for production. To launch it, a certain amount is required, which Hiner intends to spend on developing packaging and purchasing raw materials.