A fan is a device used to generate wind, both strong and slow. Its main function is to be an air freshener, as an air conditioner, and a dryer.
The fan that we often see, generally has a propeller to generate wind and create a comfortable environment for you to do daily activities.
The sound from fans that use propellers does tend to be louder or noisier, especially when used in maximum power.
The noise of the fan can be adjusted by how fast or how slow the propeller rotates. If you want to use a fan with a low noise, as a result the wind that comes out is not much and can still make you feel hot.
In dealing with problems regarding fan power and the noise generated by fans, James Dyson from England created a new innovation, which is a bladeless fan or fan without a propeller. It can be called a Dyson Cool fan.
This fan without a propeller certainly makes a lot of people curious and wants to know how it works, because the most important component in a fan to keep it running, lies in the propeller.
The way the fan works without a propeller is that the key lies in the fan’s leg, there is a cavity that has a suction engine with a quiet sound. Then the air that has been sucked in will be distributed to a circular channel above it.
The circle has a function as a place for compressed air to flow through the gaps provided. In making a fan without a propeller, the principle used is Bernoulli’s laws of physics.
The principle of Bernoulli’s law of physics is a law related to the amount of pressure, the kinetic energy of each volume, and the potential energy of a volume which at each point along the fluid flow are considered to be the same.
If applied to fans without a propeller, because the air pressure that has been generated around the circle is higher, compared to moving air tends to be lower.
The low pressure air, located behind the fan and will be sucked into a circle, will then be pushed forward, this makes the exhaled air stronger than the normal fan.
The technology behind this sophisticated bladeless fan is assisted by an air-suction motor that has been made by Dyson. Although the shape looks small, but its strength is not in doubt.
Because the rotation of the fan without a propeller has a very strong air-sucking power, which reaches 110,000 per minute (RPM). You can compare this to the racing engine speed of F1 which is known to only reach 15,000 RPM. You can imagine how powerful this technology is.
For the sound problem that Dyson fans barely cause, it is known that there is a collaboration with an acoustic engineer to mute the sound.
The technology used is Helmholtz cavity technology (Helmholtz Cavity). The purpose of this technology is that the air flow that has been generated by the fan will be trapped in the cavity first.
The air trapping process is carried out to change the amplitude. This process causes sound waves to be generated from the fan, so it is not noisy without turbulence.
The fan invented by Dyson is often referred to as using Air Multiplier technology (air multiplier) and has several advantages that must be known, including:
- The fan does not need a protective wire like the fans we usually see, because there are no parts that rotate like a propeller. It is dangerous if someone touches it, especially if it is touched by children. So this fan without a propeller is considered safer, especially for those who have children at home.
- A fan without a propeller doesn’t need to be cleaned too often, because sometimes what makes it dirty is the part of the blade. Because this fan is bladeless, so you can use it longer without having to clean it.
- To control how strong the wind is generated by a fan without a propeller, you can use a dimmer. Dimmer is a device that is shaped like a switch, usually used to adjust the brightness or dimness of a lamp.
In one of Dyson’s interview sessions regarding the manufacture of fans without propellers, Dyson raised his concerns regarding fans circulating in the market.
Dyson was disappointed that the propeller cutting off the airflow was the source of the annoying noise from the fan. And worry about kids sticking their hands to touch the propellers.
Based on his worries, finally Dyson developed a fan without a propeller and he felt it was very helpful for many people.
Those are reviews made about fans without propellers, it is necessary to know that buying a fan can be suited to the needs of each person.
For this type of fan, it is very safe to use in homes with babies or small children. Because sometimes the biggest concern of fan users is the propeller.
It is not uncommon for most young children or babies to be curious about objects that move like propellers, maybe they see them as toys.
As a result, they will enter their hands through the barriers and can cause injury if the hand is not pulled out immediately. So, this fan without a propeller is indeed a safe and appropriate choice for fan users who live with small children and babies.