On the surface, bladed fans have blades, while bladeless fans do not. In fact, bladeless fans also have blades, but they are hidden in the casing, like a hair dryer.
Due to people's usage habits, the blades of bladed fans generally blow air in a horizontal direction, while bladeless fans blow air vertically upward, but when they blow from the air outlet, they also turn to a horizontal direction. .
With a bladed fan, the rotation of the fan blades pushes the air forward, and the air at the back flows to fill it and is pushed outward by the blades of the fan as long as the fan is bladed. The motor is working, it will continue to push the air forward, sending out a continuous stream of air.
For bladeless fans, the rotation of the fan bladesThe fan blows air near the fan blades upward. Outside air enters through small holes in the housing that surrounds the fan blades and is then expelled. Therefore, the motor rotates to continuously inhale air and blow it upwards. However, unlike a bladed fan, the fan blades do not blow air directly, but first blow it into the cavity of the upper circular ring. The interior of the circular ring is hollow and has a wing-shaped cross section. The airflow blown from below will be accelerated inside and then expelled from the slot on the edge. The blown air stream will stick to the circle wall and blow forward, causing low pressure in the internal area. be forced and blown through the slot. The blown air flows together forward. As a result, the final air flow would be 15 times greater than the initial air flow.
How does a bladeless fan produce air ?
How to Make a Five-Leaf Windmill:
Making a Five-Leaf Windmill is a fun and easy craft project. stimulating. The manufacturing method of a five-blade wind turbine will be described in detail from three aspects: material preparation, production steps and precautions.
1. Preparation of materials
1. Cardboard: Choose a thicker piece of cardboard as the base of the windmill and prepare it. thinner cardboard is used to make the blades.
2. Pencil and ruler: Used to mark and measure cut locations on cardboard.
3. Scissors and knives: Used to cut cardboard and cut out the shape of leaves.
4. Small-hole pins or pins: Used to secure the windmill blades and connect the base.
5. Colorful paintbrushes or decorative paper: Used to paint and decorate the windmill.
2. Production Steps
1 Prepare the windmill base: use a pencil and ruler on cardboard to draw a square. or Make a basic circular pattern and cut it out with scissors or a knife.
2. Make windmill blades: Use a pencil and ruler to draw five equally sized blade designs on thin cardboard and cut them out with scissors or a knife.
3. Color or decorate the leaves: Use colored brushes or decorative paper to color or decorate each leaf to make it more lively and interesting.
4. Connect the blades to the base: use in the center of each blade. Pins or pins are used to fix the blades, then the blades are connected to the base to ensure that the blades can rotate freely.
5. Secure the shaft and base: Use a small hole pin or pin to secure a shaft to the center of the base to ensure that the windmill can rotate stably.
6. Test and adjustment: Gently blow with your hands or test the rotation of the windmill in a place with strong wind, and adjust the angle of the blades and the fixed position of the base as necessary. .
3. Precautions
1. Use scissors and knives carefully during the production process to avoid injury. It is recommended to produce it under the guidance or supervision of an adult.
2. Make sure the windmill blades are the same shape and relatively balanced so they can spin better.
3. The base and blades should be firmly fixed to ensure that the windmill can rotate smoothly.
4. When painting and decorating, you can use different colors and patterns according to your personal preferences to increase the beauty of the windmill.
5. PenDuring testing and adjustment, the blade angle and base position can be adjusted according to the actual situation to make the windmill run smoother.
What is the generator windshield?
The wind initially blows from the small hollow in the middle of the ring, which is open in the center. There is a thin slot a millimeter wide, and the wind is first blown from here by the turbine fan in the base, which extracts air next to the base.
Its operating principle is that the 40 watt electric motor in the base draws 33 liters of air into the fan base per second. After being accelerated by the cyclone accelerator, the air circulation speed is increased to the maximum. About 16 times it is surrounded by the annular inner lip of the bladeless fan head. Its surrounding force pushes the air near the fan head to enter the fan head and expulsing at high speed!
Detailed information
1. The bladeless fan is inspired by air blade hand dryers. The principle of the air blade hand dryer is to force air through a small opening to "blow" water from the hands. The air multiplier allows air to escape from a 1.0mm wide cutout that runs around the ring amplifier. Since air is expelled from this circle, the amount of air passing through it can increase 15 times and its speed can reach 35 kilometers per hour.
2. The air flow of the air multiplier is gentler than the wind generated by ordinary fans. The amount of air it produces is equivalent to that of the most efficient fans on the market today. Since there are no fan blades to "cut" the air, users will not feel periodic shocks or wave-like stimulations. It makes you feel morenaturally cool thanks to continuous air flow.
3. The bladeless fan uses technology from jet engines and automotive turbochargers to draw air through the suction holes at the bottom. A turbine hidden inside the edge of the ring blows air in a circular fashion. the trajectory shoots out, ultimately forming an uninterrupted flow of cold air. What is important is that this air flow is better than normal. The wind generated by the fan is gentler. The amount of air it produces is equivalent to that of the most efficient fans on the market today.
4. This bladeless fan is also equipped with a variable frequency wind speed adjustment device, which allows users to adjust the wind speed according to actual conditions. The air volume increases uniformly without voltage impact, and the air volume increases uniformly without voltage impact. lakeOur power consumption is low, half that of ordinary fans. At the same time, the airflow will also push the air into the ring through the viscous force. Superimposing the two effects can theoretically make the actual amount of air blown 15 times greater than the amount of air flowing through the base!
References:
The generator will generate a lot of heat when it runs to produce electricity. Cold air must pass between the stator and rotor, so there will be fan blades on one end of the generator. The high-speed fan blades will blow. cooling air. There should be a grid-like net (mostly circular and closed) on the outside, which is the windshield of the generator, which protects the fan blades to prevent objects from falling onto the wind blades.tilator.