From July to August, the scorching weather in the south continues unabated, and the high temperature in the 30s is simply not liveable.
Oh my goodness! In this scorching summer, every time I go out, I feel like I’m drenched in water. It’s too hot. I hope there’s a handheld fan like a lollipop at that time, to catch the hot and dry heat from the tropical zone.
I don’t know if my friends have seen the scene of young ladies waving a lollipop like object at their heads on the road.
As long as the small fan blades rotate, they raise gusts of fresh air, sweeping away all the heat around them. Coupled with their compact and easy to carry appearance, they have now become the beloved of many young people.
Next, let’s talk about three important parameters for purchasing small fans to help everyone avoid pitfalls.
electrical machinery
Whether it’s a desk fan, ceiling fan, industrial fan, or any other fan, the motor is always the most important component, just like a processor in a mobile phone, which determines the overall experience and functional performance of a product.
At present, there are two main types of motors equipped with small fans, namely the two brothers of brush motor and brushless motor, which were taught by middle school physics teachers to us.
The manufacturing process of brush motors is mature, cost-effective, and powerful. They are mainly used in low-priced fans, such as USB fans priced at 10 yuan per fan at street vendors.
Due to the structural issues of the motor itself, it experiences severe friction and vibration during operation, which can easily lead to the generation of high-temperature deteriorated magnets. Therefore, the disadvantages are very obvious: short lifespan, high noise, and low speed.
This is also why the USB small fan you bought for a few yuan broke down in just a few days.
The brushless motor is an improved version of the brushless motor. After removing the carbon brush, it greatly reduces the friction during rotation, stabilizes operation with little vibration, and has advantages such as low noise, long life, and high conversion efficiency.
With the above advantages, brushless motors have become the standard equipment for mid to high end fans. When purchasing small fans, it is also recommended that everyone prioritize the four words “brushless motors”.
The price may be slightly higher than that of a brush motor, but it can be exchanged for longer service life, longer endurance, lower noise, and a better experience at no cost.
Endurance
We use small fans just to enjoy the beauty of the cool breeze anytime and anywhere. No one wants to face the terrible situation of being out of power for two minutes, right?
The battery life is crucial as it determines the length of time we enjoy, and the size of the battery determines the length of the life,
At present, small fans mainly use lithium batteries with capacities ranging from 500 milliamperes to 4000 milliamperes.
There are also 10000 milliampere men’s and 20000 milliampere giant models specifically designed for fitness enthusiasts, which feel like dumbbells when picked up. Ordinary people should not try them.
Don’t think that larger batteries are better, but also consider weight issues.
A small fan with a 4000 milliampere battery, weighing at least 250 grams or more, can be lifted for two to three hours with a weight of over half a kilogram. It is a small matter to have sore hands and wrists, and over time, it can even cause arthritis.
The volume of the fan also expands by a circle, requiring a larger bag to accommodate it, greatly reducing the grip feeling, which is not worth the loss.
So, friends should choose according to their actual situation. Normally, the combination of a DC motor and a 2000mA battery provides the best overall experience.
The battery life is about 4 hours, and the weight is within 180 grams, which is similar to a mobile phone and sufficient to meet the daily needs of most people.
If you need to use it for a long time and cannot blow for more than 6 or 7 hours, you can choose a small fan with a 3000 milliampere battery or more, but remember not to hold it for a long time and leave a few minutes for your wrist to relieve fatigue.
noise
In addition to using small fans in open spaces such as streets and subways, we also occasionally use them in enclosed spaces such as offices, libraries, and school classrooms.
If the fan noise is too loud at this time, it is easy to disrupt the quiet environment and disturb others. If you encounter someone with a bad temper, you may be caught on the spot performing real wrestling and comprehensive fighting.
For the sake of personal safety, we should try our best to choose a small fan with good mute effect.
By the way, Baidu Baike would like to share with you that noise below 40 decibels is an ideal quiet environment that will not affect others.
The loudness of a 40 decibel sound is approximately the level to which two people whisper, but if they hear a slight conversation, it is not obvious.
In other words, as long as we choose a small fan with a noise level below 40 decibels, we can use it wherever we want, without worrying about disturbing others.
So how do you determine the noise level of a small fan? It’s very simple. One is to look at the motor and fan blades, and the other is to look at the product introduction.
The reason why a small fan makes noise is because the motor drives the fan blades to rotate at high speed, causing vibration. The stronger the vibration, the greater the noise.
Normally, the combination of a DC brushless motor and odd blades has the lowest noise value. We can find relevant information in the product parameters.
The small fan recommended today also inherits the gene of “cheap and high-quality”.
Let’s take a look at the configuration first. The weight of 170 grams is lighter than the iPhone 12Pro, and holding it for a long time will not cause too much burden on the wrist.
Equipped with a built-in 1800 mAh battery, it can withstand high temperatures for at least 3 to 4 hours after being fully charged. It is not afraid of suddenly running out of power halfway on the road and can withstand the scorching heat.
Adopting a combination of brushless motor and 5 fan blades, it is stable and does not shake during rotation, with a noise level of only 36 decibels. Two are silent.
The design of the fan leaves makes the wind blowing softer, as comfortable as the spring breeze.
A fully functional small fan without any shortcomings is recommended for those who have requirements for battery life and pursue practicality.
For this type of product, I do not recommend purchasing it, because low-quality batteries and old motors are often used in low-quality fans, and the probability of problems is very high. It is not worth risking your own body to save a few dollars.
Once again, it is important to focus on big brands when buying fans. Big brands may not have an advantage in price, but at least their quality is good, their materials meet national standards, and their safety is guaranteed.