Turn off a fan

Fans are practical and cool for little money when the summer heat is unbearable. However, many fans with axial drive due to loud turning noise. How to turn off a fan, but also what you should not do, you can read here.

Different versions of fans

Fans are in demand, especially in summer. Not everyone is lucky and acquires a quiet device. However, a distinction must also be made between the different types of fans beforehand:

  • ceiling fans
  • standing fans
  • Fans that are attached or hung on the wall

At night, all cats are gray and the daytime quiet fan suddenly loud

Fans are a cheap alternative to the air conditioning system when purchasing or operating a car, especially for cooling off on hot summer days. Of course, this also applies at night. However, there is a difference here. While many background noises, which are often not perceived as such during the day, drown out the noise of the fan, the same device can annoy at night like a flying plane.

There is a remedy - which even comes from the aviation technology.

But why is the fan so loud at all? In the answer to this question is also the solution. Between the front and the back of the blades creates a pressure difference (on the one hand, the suction of air, on the other hand the pushing away of air). At the tips of the rotor blades they therefore get into rotation. The effect is similar to an automobile with broken landing gear (springs and shock absorbers). The vibrations rock up to maximum.

Winglets are the solution

So you have to counteract this vibration. In addition, a technique is used that was invented about a century ago. These technical components have prevailed on modern airplanes on their wings. These are so-called winglets. These are small wings at the wing tips. On aircraft wings, you may have noticed the upturned tips - that's exactly these winglets.

This is how the fan winglets work

Without these winglets there will be strong swirls of air, which you may have already seen as wakeworms. Even with fans, such air turbulence occurs and causes the blades to vibrate, which transmits to the drive shaft. Without dipping deeper into the technical explanation, let me say so much: these winglets effectively neutralize the resulting vibrations and the fan becomes much quieter overall.

Noise reduction in some cases by more than 10 dB

These vibrations can generate an additional noise level of around 10 dB. Accordingly, you can reduce the noise emissions of your fan by more than 10 dB. High-quality fans that claim to be particularly quiet are naturally equipped with such winglets.

Tips & Tricks

As already written, these vibrations continue down to the drive shaft. Often, therefore, trying to make the drive shaft quieter with creeping oil. Often graphite-containing lubricating oil is used. This is urgently advised against.

The lubricating oil on the drive shaft ensures that dirt particles stick to the drive shaft and the fan not only gets louder very quickly. Also, the engine can be damaged, since the rotational resistance increases significantly, so that the drive motor is required a higher performance, for which he is not designed in the long term.

Video Board: Ceiling Fan Lighting Malfunction Lights Turn Off After About One Second Than Won't Work