Air flow unit conversion:

Pressure unit conversion:

1.The most obvious benefit brought by silent-fan speed control is reduced noise.
2.Energy conservation - "Low carbon" is increasingly valued by customers.
3.Stability - to a certain extent, can increase the lifespan of the fan.

By changing the duty cycle of the input PWM signal, we can control the fan speed within a certain range, thus achieving "on-demand speed adjustment" of the fan.

PWM, whose Chinese name is "pulse width modulation", refers to the signal waveform formed by controlling the circuit to switch between "on" and "off" at a fixed frequency (this "time" is called duty cycle).
The PWM signal has the following characteristics: fixed frequency (frequency: how many cycles are completed in - seconds) and variable duty cycle (this is also the main parameter of the PWM signal). Therefore, the necessary and sufficient conditions for constituting a PWM signal are frequency and duty cycle.

The noise value marked on a certain fan refers to the decibel number measured at a distance of 1 meter from the fan inlet when the fan is unobstructed in front and behind.

The noise generated by the fan when it is unobstructed in front and behind mainly comes from:
1. The noise generated by the fan blades cutting the wind , it is the main source of noise.
2. The noise generated by the bearing when the fan rotates.
3. The subtle electronic noise generated when the magnetic poles inside the fan switch (may be very small).
4. Due to air flow, the wind causes some components in the system to vibrate.
5. The vibration generated during the rotation of the fan causes the resonance of the box.