In the hot summer, people feel uncomfortably hot wherever they go. Therefore, we often carry a palm fan or a paper fan with you to cool down and use it anytime, anywhere. This is the simplest kind of portable fan, but this kind of fan requires manpower to shake the fan to use, and people's activities cause more heat, so the actual use effect is not good.
With the continuous development of science and technology, people have invented electric fans. The motor drives the fan blades to force the air to flow, instead of relying on manpower to shake the fan. In summer, you can easily and conveniently enjoy the coolness of the artificial wind. Since the common electric fan completely relies on the electric energy of the mains grid to provide energy to drive the fan, it has the limitation that it can only be used in the city where the mains grid is connected. Obviously, ordinary electric fans can not be called portable fans.
In order to make the electric fan, a relaxing and comfortable cooling tool, serve human beings anytime and anywhere, many electrical appliance manufacturers add batteries to the traditional fans. electrical energy. This progress has made a big step forward in the portability of electric fans, but its too large and heavy body still cannot be carried around.
Therefore, this fan was further improved to reduce the size and weight, and finally a miniature version of the battery-powered mini electric fan came out, which met the needs of portability to a certain extent, so it bloomed everywhere. There are plenty of portable fans of this type on the market.
With the passage of time, people have found that there are still several problems with this kind of fan: 1. The cost of using the battery is high; 2. The wind force is not strong enough; 3. The structure is not strong enough and easily damaged; 4. Although the appearance is reduced, the The overall appearance is irregular and cannot be easily carried in a pocket.
Due to the above problems, the practicability of portable fans is greatly reduced, and they are gradually reduced to toys or decorative products.
It seems that in order to make the portable fan truly practical, the above problems must be solved through technical research.
The author has found in the market that there is a truly practical portable fan that can completely solve all the above problems. By contacting the real object of the fan, it is found that this fan uses a 18650 large-capacity rechargeable lithium battery to provide power to the fan. Because the lithium battery can be recharged and used in a cycle and has a large capacity, it completely solves the high cost of constantly changing batteries and the problem of other batteries being too heavy; wind power The problem of not being big enough This fan drives the high-power fan motor by raising the battery voltage to 12V, which increases the wind power significantly; the appearance is more novel and unique, small and light, and can be easily carried in your pocket, using an integrated structural design , All parts are in the shell, the structure is firm and durable.