What is the principle of a bladeless fan? What are the advantages of bladeless fans?

1. The bladeless fan is inspired by the air blade hand dryer. The principle of an air blade hand dryer is to force air through a small opening to dry the water on your hands, and an air multiplier is to blow air out of a millimeter-wide incision that rotates around a toroidal amplifier. Since the air is forced out of this circle, the amount of air passing through it can increase by 15 times, and it can reach speeds of up to 35 kilometers per hour.

The air flow of an air extenderer is smoother than that produced by a regular fan.

2. The bladeless electric fan can produce a natural and continuous cool breeze, and because there are no blades, it will not cover the dust or hurt the children's fingers.

3. The shape of the bladeless electric fan is peculiar, and the appearance is both streamlined and refreshing, which creates an incomparable visual effect.

4. The bladeless electric fan uses a turbo compressor, so the energy consumption is very low, and the energy consumption is only half of that of the ordinary fan, so the bladeless fan is also more energy-saving.

Introduction: In life, there are many examples of children being injured by electric fan leaves because they are naughty, and now a new type of bladeless fan has appeared on the market to avoid this injury. But at the same time, the person will have questions, is the bladeless fan any good?

What is the principle of a bladeless fan? Let's talk about this issue briefly.

Bladeless fans, also known as air multipliers, produce a natural and continuous cool breeze with a fresh and lovely appearance. It mainly blows air out of a millimeter-wide incision that rotates around a ring. Because the air is forced to blow out of this circle, the volume of air increases.

The bladeless fan was first introduced in the UK in '09. In the same year, Hu Guoxian, a farmer entrepreneur in Zhejiang, applied for an invention patent from the state. In 2011, the second generation was launched in Hong Kong.

Design: The bladeless fan is inspired by the hand dryers we use so often. Through the internal equipment, the air is absorbed, and the air speed is increased to achieve cooling'The effect, it brings a smoother air flow than that produced by ordinary fans, and is currently the best performing fan on the market, through which you can feel the natural cool breeze.

The appearance is also cute.

Bladeless fan principle: The working principle of the bladeless fan is mainly that the motor in the base below will suck 33 liters of air per second into the fan base, and after being accelerated by the cyclone, the air circulation speed is increased by about 16 times at most, and it is surrounded by the annular inner lip of the bladeless fan head, and its surrounding force drives the empty draft Chi gas near the fan head to enter the fan head and blow out at a high speed. It is also a cyclical process.

Overall, bladeless fans have several advantages: the wind is smooth, natural, and gentle; Small size, will not cover dust, easy to clean; Because the bond is leafless, it is relatively safe. From these advantages, it is not difficult to see that bladeless fans are still very easy to use.

It is not difficult to see from the above introduction of bladeless fans that bladeless fans are still very good, and there are not many bladeless fans on the market now.

In fact, all the questions about bladeless fans can be boiled down to one question, that is, where does the wind come from? The wind first "blew" from the tiny air groove in the middle of the ring: the huge ring on the top of the bladeless fan is not a complete gimmick, but an important component, it's **, open a 1 mm wide slit, and the wind, at the beginning, was blown out from here by the turbofan in the base, extracting the air next to the base.

x0d x0a Of course, you can't expect a 1 mm wide slit to blow a steady and sufficient amount of wind. This brings us to the second question, what does the name of this bladeless fan, air amplifier, air multiplier mean, and how does it "amplify" the air? This involves two physical terms, the first is entrainment, which simply means that when a stream of air passes through at a rapid pace, it pulls the surrounding air and moves them with it.

In this regard, you can imagine the crowds at the job fair, and the people around are always involuntarily following the large group, haha. In the case of bladeless fans, when the airflow is blown out of a 1 millimeter-wide slit at 55 mph, it will carry the surrounding air forward with it; The second is negative pressure, which is not difficult to understand, the air pressure behind the ring will be reduced, and more air will be added to the rear to balance the air pressure - under the action of these two physical terms, the air, or bladeless fan, is significantly amplified, reaching 15 times the amount of the turbofan itself. x0d x0a Last question, how does it keep the airflow smooth?

Because of the description of question 2, it seems difficult to control? This brings us to the third physical term, the Reynolds number. However, before explaining what this is, let's go to the kitchen and look at the faucet, yes, please unscrew the faucet and open the water, generally speaking, when the faucet is ajar, the water flow is always relatively smooth, gushing out of the water pipe in bundles; And once you open it all or reduce the degree of unscrewing, the water flow will not be honest and the water will start to splash - this phenomenon, simply put, the shape of the fluid, is roughly related to its own viscosity, initial pore size, etc.