This is an automatic adjusting device capable of reducing computer fan noise, which is provided with a circuit board containing a fan control circuit, so that the circuit board can be vertically inserted behind the power transistor heat sink on the computer power supply, and a preset thermistor is placed in front of the heat teaching sheet, and a gap distance is kept, so that the thermistor can automatically adjust voltage according to the temperature rise and fall when high temperature occurs, or can be matched with a medium variable resistor to make fine adjustment changes, and drive the fan to dissipate heat through the first and second amplification of the two power transistors, and can stop or slow down the fan rotation speed when low temperature occurs. However, the noise of the fan can be greatly reduced, the fan life can be prolonged, and the electric energy can be saved more effectively.

    Because the computer mainframe uses multi-dielectric power transistors and related transformers, the power supply will have a heating problem after a period of operation.besides installing heat sink, the power transistors usually have to use fans to dissipate heat.

    However, in order to prevent the generation of heat, the existing computer is designed to keep the cooling fan burning and turning after the computer is turned on, so as to achieve the function of heat dissipation, but it also has many purchasing defects due to its constant turning. For example, the continuous rotation of the fan will produce continuous noise, which directly affects the work of computer designers or operators, while the continuous rotation of the computer fan wastes energy.

    What's more, when the computer is used for a long time, not only will the necessary components of the computer generate serious heat, but the motor of its cooling fan will also generate heat.Such a vicious cycle will prevent the whole computer from operating normally at normal temperature, resulting in unexpected damage.

    The purpose of this automatic adjusting device is to provide an effect of reducing the noise of the computer fan.A circuit device is inserted beside the cooling fins of the power transistor of the computer power supply, and a thermistor can be placed between the cooling fins to accurately sense the temperature change, thereby driving the circuit device, the fan can be driven to dissipate heat at a set temperature, and when the temperature does not reach a certain temperature, the fan print stops or folds its rotation, thus reducing the noise generated when the fan rotates from the surface and saving electric energy.

    The advantage of the automatic adjusting device is that the cooling fin of the computer power supply is inserted with a fan adjusting circuit, so that the speed of the fan can be adjusted to increase, slow down or stop its wind speed according to the change of temperature.Its visible advantages include effectively reducing the noise caused by the action of the computer fan, saving electricity and increasing the life span of the whole computer body according to the action mode of temperature, which is a gorgeous improvement on the ventilation device of the existing computer equipment.