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Low-noise computer heat dissipation fan damped by spring

Back to list Release date: Sep 19, 2019

this article relates to a computer heat sink, in particular to a low noise computer heat sink fan with spring shock absorption.

the well-known computer heat dissipation fan mainly consists of fan blades, stator bases and frame bases.when in use, the fan blades are generally fixed to the radiator or computer chassis by self-tapping screws.due to manufacturing reasons or after a period of use, the dynamic balance of the fan blades is damaged, and the vibration generated during rotation and noise, through the radiator or direct conduction to the chassis, even cause chassis resonance when serious.

the purpose of this paper is to provide a computer fan with low vibration and low noise.because this paper adopts elastic material connection between the fan blade stator base and the frame base, the vibration of the fan is prevented from being transmitted to the chassis through the frame base, and the vibration noise of the fan is eliminated.at the same time, this paper also equipped with temperature adjustment device, can automatically adjust the fan speed according to the radiator temperature, can reduce the fan airflow noise appropriately.


damping characteristic, which prevents the vibration generated when the fan blades rotate from being transmitted to the outer frame and other fastening devices, and the temperature sensor closely attached to the radiator can control the voltage level of the fan power supply according to the temperature of the radiator, so as to enable the fan to automatically adjust the purpose of the speed.

the following is a further explanation of this article according to examples:

embodiment 1:fig.1, fig.2 and fig.3 are schematic structural diagrams of this article, (1) fan blade, (2) stator base fixing bracket, (3) frame base, (4) stator base, (5) outer spring hook, (6) inner spring hook, and (7) spring. In order to enable the fan blade (1) to be stably fixed on the frame seat (3) center.in the embodiment, 3 or 4 springs are respectively used, or more than 4 springs can be used.each spring fixes the stator base (4) at the center of the frame base (3) by its own pulling force through corresponding inner and outer spring hooks. The outer spring hook (5) forms a certain angle at the bottom of the outer frame degrees of projection, the middle hole and the center of the outer frame are notched in the opposite direction; The inner spring hook (6) is a protrusion with a certain angle on the outside of the stator base (4), and the middle opening is notched in the direction opposite to the center.

in this embodiment, the fan speed adjustment circuit is not used.

embodiment 2:figs.2, 3 and 4 are schematic structural diagrams of this embodiment, (3) frame seat, (4) stator base, (5) outer spring hook, (6) inner spring hook, and (7) spring. The structure of the fan is the same as that described in the first embodiment.fig.4 shows the fan speed automatic adjustment electricity circuit schematic diagram of the circuit.in the figure, the e pole of the power adjustment tube q is connected to the power supply voltage terminal v1, the c pole is connected to the fan power supply voltage terminal v2, and the b pole is connected to the sliding terminal of the adjustable resistor VR.one end of the adjustable resistor VR is connected to the power supply voltage terminal v1 through the resistor r, and the other end is connected to the power supply voltage terminal v1 through the temperature sensor rt is connected to the power supply ground, and the temperature sensor Rt is tightly attached to the surface of the radiator. According to the diagram, when the radiator temperature is low, the resistance of the temperature sensor Rt increases, the current flowing through the b pole of the adjusting tube is small, the voltage drop across the adjusting tubes e and c is large, and the voltage obtained by the fan is low and run at a lower speed; Similarly, when the radiator temperature is high, the fan runs at high speed due to the high voltage obtained. Proper adjustment of VR can match the fan speed with the radiator temperature.for example, when the radiator temperature is 38 degrees, the fan will rotate at 70% of the rated speed operation, when the radiator temperature is 48 degrees, the fan runs at 95% of the rated speed.

fig.3 is a schematic diagram of the circuit connection in this paper, (8) fan circuit board, (9) connecting wires, (10) wire fixing holes, (11) speed regulating circuit board, (12) fixing holes, (13) fan power plug. As shown in fig.3, the fan circuit board (8) adopts a softer connection guide the wire (9) is connected with the speed regulating circuit board (11) through the wire fixing hole, and the fan power supply is taken from the corresponding socket of the computer mainboard by the fan power plug (13). The speed regulating circuit board (1I) is fixed to the side surface of the frame seat (3) by screws through a fixing hole (12), and the temperature sensor Rt is tightly attached to the radiator fixed:the speed regulating circuit board (11) can also be fixed with the temperature sensor Rt in close contact with the radiator.

through the above scheme, this paper improves the well-known computer fan and achieves the purpose of low vibration and low noise operation of the computer fan.


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