Ventilation does not always work as well as the owners of the living quarters would like. For this simple reason, our citizens often resort to using various "auxiliary means", for example, installing a fan on an air duct in a bathroom, toilet or kitchen. And all would be fine, if after a while another trouble did not appear - the annoying noise from the fan.
It is important to choose the right model. | Photo: zasor-nn-zasor.ru.
The volume of the most modest fan for the air channel is about 30 dB. This is more than enough to lose peace of mind, especially after a hard and stressful day at work. First of all, you should clearly understand the reasons why the fan can make noise. There are three main reasons for the problem:
1. Fan quality and type. The fan on the bushings, not on the bearings, will make more noise than we would like to begin with. Moreover, during the operation of the unit, its parts and assemblies wear out. Backlash appears, the blades begin to walk incorrectly, resulting in noise. Finally, even the bearing can break down over time and make noise.
2. Blockages and speed. Everything should be clear here. A dirty fan does not work properly, there is a backlash in the movement of the blades, unnecessary vibration is generated and collisions of moving and stationary elements occur. Almost the same thing happens if the speed of the unit is close to the maximum permissible values.
3. Incorrect installation of air ducts. The fewer corners and bends, the better, the quieter the installed fan will work. It is also worth understanding that even slightly protruding from the thread of the fixing bolt can cause noise.
Knowledge of the listed subtleties, compliance with installation rules, purchase of only high-quality products, as well as timely Cleaning and lubricating the fan will greatly reduce the amount of noise generated by a useful appliance. In addition, you can try to apply one old-fashioned technique, namely, artificially reducing the fan power.
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The bottom line is that to slightly reduce the return of the unit, thereby reducing its noise and retaining a large share of its working potential. This is done easily. To do this, when connecting a fan, you must connect it to the home network through a capacitor and a resistor. For most household fan models, a 400 V capacitor with a capacity of 0.3-0.8 μF is suitable. The resistance of the connected resistor must be 1 MΩ. When the fan is connected, the resistor and the capacitor are first connected in parallel and then built in series into the power circuit of the device.
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If you want to know even more interesting things, then you should read about "Five" products that are more profitable to do do it yourself.
A source: https://novate.ru/blogs/080420/54072/