The main performance of the fan from the following aspects: speed, blade shape, blade, angle and bearing system. Under normal conditions, the speed of the fan is indicated on the statement of the radiator. Generally speaking, 30% of the heat dissipation effect of the radiator depends on the speed of the fan. But the fan speed is not the higher the better. The correct fan speed should be determined according to the calorific value of the CPU. The selection of fan speeds of different specifications should be distinguished. The fundamental criterion is: under the premise of generating the same air volume, the larger the fan speed, the lower the speed, and the noise will also be smaller. The common speed between 3500 and 5200 revolutions is more in line with the regular.
The difference between AC and DC fans AC fan is AC, its power supply voltage will be positive and negative, and fixed together with the power supply voltage of DC fan, so it must rely on circuit control to make the two sets of coils work in turn to generate different magnetic fields. AC fan has a fixed frequency, so the magnetic pole change speed generated by silicon steel sheet depends on the higher frequency on the power supply frequency and the faster magnetic field switching speed. Theoretically, the speed will be faster, just like the more DC fans, the faster the speed. But the need to note that the frequency should not be too fast, otherwise it will be difficult to activate.
Generally speaking, the correct device of the DC fan is conducive to the heat dissipation performance of the product, including the device direction, wind direction, location, and the distance between the heat dissipation products. Regarding the same DC fan, due to the different devices, the performance of the heat dissipation effect will be very different. How to correctly install the DC fan, please pay attention to the following points: First, the air duct at the inlet and outlet of the fan is supported separately, and the weight of the air duct is not allowed to increase the stacking weight on each part of the fan. Second. The distribution control box of the fan station must be matched with the corresponding fan. The wiring of the third fan shall be stopped by a professional electrician, and the wiring must be correct and reliable. After the end of the third fan device, move the impeller by hand or lever to check whether the impeller is too tight or scratched. Fourth. After the end of the fan device, to check whether there is any toolbox debris left in the fan is to check all items and whether there is any abnormality after the machine test. If nothing happens, it will be complete.
A better radiator has no burrs on the edges, no deformation of the heat dissipation fins, no cracks in the bottom lubrication, neat appearance, generous appearance, warranty, anti-counterfeiting marks or trademarks with other characteristics, etc. In addition, when choosing a radiator, you should also pay attention to the fact that the bottom of the radiator should not be too thick. Because the thermal conductivity of aluminum is not very good, too thick will affect the heat transfer; in addition, the diversion groove on the surface of the radiator should be denser. This can ensure that the radiator has a larger contact area with the air, thereby enhancing the heat dissipation effect.
The voltage of ordinary cooling fans is generally 12V, but some customers' products, such as temperature-controlled cooling fans, set the cooling fan voltage lower at low temperatures. At present, under low voltage conditions, the cooling fan speed will be slower and more In order to design three different levels of air volume, some customers have designed three different voltages below 12V, in this way, the cooling fan that does not work within the rated voltage range for a long time will not be damaged. As long as the supplier can ensure the normal operation under low voltage and the normal start and operation of the ordinary 12V cooling fan, there is no problem below 12V. For example, the 12V high-speed cooling fan can work under the voltage as low as 5V or even 4.5V, and the sound is relatively quiet at this time.
The working principle of the low-noise axial flow fan is that when the impeller rotates, the gas enters the impeller axially from the air inlet and is propelled by the blades on the impeller, thereby increasing the energy of the gas, and then flows into the guide blades. The guide vanes change the deflected gas into axial movement, while the guide vanes guide the gas into the diffuser, further converting the kinetic energy of the gas into pressure energy, which is introduced into the working pipe. The blades work in a similar way to the wings of an airplane. However, the latter exerts lift on the wings and supports the weight of the airplane, while the axial fan fixes the position and moves the air. The section of low noise axial flow fan is generally airfoil section. The blade can be fixed or rotatable about its longitudinal axis. The inability to adjust or adjust the angle or spacing between the blades and the airflow is one of the main advantages of axial fans. Leaflet nodal angle will produce a lower flow, while increasing the leaf energy will produce a higher flow.
The voltage of ordinary cooling fans is generally 12V, but some customers' products, such as temperature-controlled cooling fans, set the cooling fan voltage lower at low temperatures. At present, under low voltage conditions, the cooling fan speed will be slower and more In order to design three different levels of air volume, some customers have designed three different voltages below 12V, in this way, the cooling fan that does not work within the rated voltage range for a long time will not be damaged. As long as the supplier can ensure the normal operation under low voltage and the normal start and operation of the ordinary 12V cooling fan, there is no problem below 12V. For example, the 12V high-speed cooling fan can work under the voltage as low as 5V or even 4.5V, and the sound is relatively quiet at this time.
The voltage of ordinary cooling fans is generally 12V, but some customers' products, such as temperature-controlled cooling fans, set the cooling fan voltage lower at low temperatures. At present, under low voltage conditions, the cooling fan speed will be slower and more In order to design three different levels of air volume, some customers have designed three different voltages below 12V, in this way, the cooling fan that does not work within the rated voltage range for a long time will not be damaged. As long as the supplier can ensure the normal operation under low voltage and the normal start and operation of the ordinary 12V cooling fan, there is no problem below 12V. For example, the 12V high-speed cooling fan can work under the voltage as low as 5V or even 4.5V, and the sound is relatively quiet at this time.