1. What brand of electric fan is silent?
1, Pioneer (Top Ten Electric Fan Brands in China, Zhejiang, pioneer electronics (China) Investment Co., Ltd.)
2. Watson Watson (19 16 Shanghai, a national enterprise with a long history and one of the top ten electric fan brands, Shanghai Watson Electric Appliance Co., Ltd.)
3. Lianchuanglian (China, first-line brand/brand, top ten electric fan brands, Shenzhen Lianchuang Technology Group Co., Ltd.)
4. Haier Haier (Top 500 Asian brands, well-known trademarks in China and China, top ten electric fan brands, Haier Group)
5. Fuji Bao (first-line brand/brand, Guangdong product, top ten electric fan brands, Foshan Fuji Bao Electric Technology Co., Ltd.)
Second, silent fans buying skills
1, judging the quality of plastic parts
The appearance color of the silent fan is mainly white, which must be injection-molded white, not oil-sprayed white. When buying, you can judge by observing whether the color inside and outside the product is consistent. Because white products must be produced with raw materials, while color sprayed products can be produced with second-hand materials (waste), and then painted with color to cover up the inferior quality of plastic products. Most of the mute fans above 100 on the market are painted. You can check them. This method can also be used to buy other pigment products. Plastic raw materials are about twice as expensive as second-hand materials. 2. Determine whether it is a brushless motor or a brush motor.
Check whether there is black powder on the edge of the air outlet gap, and be sure to see if it is black. If there is black powder on the edge, it means that the manufacturer uses a motor with a carbon brush to produce the silent fan. The silent fan with a carbon brush will constantly wear the carbon brush during operation, and the black powder will be blown out.
The life of this brush motor is generally below 2000, which means that if you use 10 every day, the motor will be scrapped in half a year. The real silent fan needs a brushless motor, which needs to be driven by a numerical control chip, and there is no life limit. If the machine can be disassembled for inspection, products without a drive board (not a control board with functions such as switch, wind speed adjustment and remote control) must use a brush motor.
The real mute fan has a relatively large drive board, switch and other function control boards. Brushless motor is about twice as expensive as brush motor. Moreover, the price of sine wave driving board of brushless motor is around 50 yuan, which means that brushless motor and driving board are more expensive than those with brushes by about 70 yuan.
3. Check whether there is flour smell.
Turn the mute fan to the wind speed, and smell the blowing wind with your nose to see if there is any peculiar smell (toner smell). If it smells, it must be a brush motor. You can't be fooled
4. Check whether there is high-frequency noise.
Adjust the wind speed of the mute fan, put your ear close to the air inlet and listen to the sound carefully. If there is obvious motor sound (high-frequency sound), it means that the driving board used by the fan is not sine wave, but square wave, and the quality can not meet the standard, and the longer the time, the louder the sound.
The above is all the knowledge about what brand of electric fans are static and silent fans that I introduced to you today. The brands mentioned above are all very good, so you can refer to them. At the same time, you must know more when buying, and you must not be a little sloppy.