What is the difference between the wind blown by a fan and the natural wind?

The natural wind is air-circulating, and the fan is relatively strong. There's an article called "The Possibility of a Fan", where you can see how much trial and error a Japanese designer has gone through to design a fan that can emulate the natural wind. The reason why the wind blown out by the fan is not so natural, may be because the wind in the circulation room, with the increase in the number of breaths, the indoor carbon dioxide concentration gradually increases, and it is also accompanied by the heat of the exhaled gas, which brings a little depression to people.

Like me, this one is much better than those guys who use big data theory research at every turn. <>

The wind of the electric fan is to push the air in front of us with mechanical force, taking away the moisture on our body surface, thus playing a cooling role, while the formation of natural wind is caused by local air pressure differences, which are usually caused by uneven heating on the earth's surface caused by sunlight. The biggest difference between the wind of an electric fan and the natural wind is the temperature.

Natural winds are formed by local pressure differences, which are usually caused by uneven heating of the earth's surface caused by sunlight. In other words, the wind we feel on a hot day usually blows from a cool place. The temperature is lower.

The wind of the fan only uses mechanical force to push the air in front of us, taking away the moisture on our body surface to play a cooling role, and the biggest difference with the natural wind is the temperature. One is inherently a little cold, and the other is inherently not low. Other differences, such as the natural wind that comes and goes, fluctuates from one to the other, while the fan wind is constant and doesn't really matter.

The differences are as follows:

1. The power source is different. The wind blown by the fan is converted from electrical energy to mechanical energy, and then to wind energy; Natural wind, on the other hand, is the movement of air due to natural causes, i.e. high and low pressure.

2. Adjustability is different. The air coming out of the fan can be manually adjusted, while the natural wind cannot be manually adjusted.

3. It gives people a different feeling. The wind from the fan is mostly dry, while the natural wind carries the smell and moisture of the place it passes through, making it feel fresh.

The "sleep wind" starts with a strong natural wind and gradually decreases the intensity of the wind, which meets the physiological needs of people. Avoid headaches, nasal congestion and other symptoms caused by prolonged strong winds. The fan blows a strong natural wind for half an hour, then a medium natural wind for half an hour, and finally a weak natural wind to the set time.

Because the data shows that as the time and depth of sleep fall increases, the intensity of the wind required by the person decreases. The natural wind switches randomly in each gear, which is irregular.

Because the heat dissipation and heat production of the human body rely on the body temperature regulation center to maintain balance. If the fan blows for too long, the body surface body temperature will evaporate with a large amount of sweat, and the body surface temperature will drop, and the heat dissipation will begin to decrease, which will make people feel uncool.

In the case of sweating, blowing the wind on the electric fan violently causes the body surface temperature to drop sharply, and the central nervous system of the human body has no time to adjust and catches a cold.

If a person is fixed to blow wind on a certain part of the body, it will affect the temperature regulation around the body and bring discomfort to a certain part of the body.

I thought that the wind of nature and the fan were the same, but because the engine in the fan was moving, it would dissipate heat, so the wind from the fan was a little hot, and I didn't want the wind of nature, understand? Oh oh dead wear? Japanese hehe! "Do you understand the meaning?"

If you fan by hand, you have to work hard, and you are also exercising, so you will feel hot.

Before the advent of air conditioners, electric fans were indispensable household appliances for preventing heatstroke and cooling in summer. At that time, the structure of the electric fan was relatively simple, on the shaft of a motor, connected to the power supply of four leaf-shaped wind wings, the motor rotated, drove the wind wings, and there would be a wind blowing out. This air volume does not change, unlike the natural wind, which is sometimes strong and sometimes weak.

Therefore, if the electric fan blows for a long time, the person will feel uncomfortable.

Although, later, various variable speed fans appeared, and the air volume blown out was also strong and weak. However, the air volume of this variable-speed fan only has a fixed number of gears, and it also needs to be manually dialed and will not change automatically, which is far from the unique feeling of changing strength and weakness of the natural wind blowing on the body.

In order for an electric fan to blow simulated natural wind, a set of self-excited electronic oscillators composed of integrated circuits or transistors is installed in the fan. The electronic oscillator outputs a periodic change of the oscillating current signal to control the voltage on the motor, so that the voltage applied to the motor also changes periodically accordingly, so that the air volume blown out by the electric fan also has a periodic change from strong to weak, and then from weak to strong. This ever-changing wind blows on the body, and it really has a bit of a natural charm.