The fan is an indispensable part of the air-cooled radiator, which plays an important role in the heat dissipation effect, and also has a decisive influence on the working noise of the radiator. The responsibilities of the fan in the air-cooled radiator are: relying on its own diversion effect, the air passes through the surface of the heat sink at a certain acceleration and in a certain way, and the heat exchange between the air and the surface of the heat sink is used to take away the accumulation on the heat sink. heat, so as to achieve "forced convection" heat dissipation.

1. Parameters:

  The two most important aspects of the quality of a fan are performance and lifespan, followed by the operating noise, which is getting more and more attention; it is also necessary to pay attention to other electrical requirements, specifications and power of the fan.

2. Air volume:

  Air volume is one of the two most important performance indicators for a fan.

The following figure shows the principle diagram of the measurement wind tunnel:

     By adjusting the nozzle (Nozzle) and the auxiliary fan (Auxiliary Blower), the air volume is controlled, and the corresponding values of the air volume (Air Flow) and the pressure difference (Air Pressure) are recorded. In addition to pressure), it is generally necessary to draw a pressure-flow diagram (that is, the so-called fan characteristic curve diagram, PQ diagram), which comprehensively shows the working performance of a fan under various pressure differences.