The computer is a necessary electronic information product for modern people, which is an era when almost everyone has one computer.The reason why the computer can operate depends entirely on the central processing unit.When the computer operates, it will surely generate high temperature.If it does not dissipate heat when it generates high temperature, it will cause unstable operation of the computer.Therefore, the central processing unit is usually equipped with a heat dissipating device, i.e.a fan device, to dissipate heat from the generated high temperature.Therefore, the design of the blades in the fan is closely related to the stability of the computer central processing unit. As for the design of the heat sink, how to make the high temperature generated by the central processing unit achieve the best heat dissipation effect under the operation of the fan can be said to be an important issue in the use of computers and operation.

            General computer heat dissipation fans are mostly single-sided suction fans, but in order to further improve the heat dissipation effect, there are double-suction computer fans designed to increase the air volume. In view of this, a high-efficiency double-suction computer fan is proposed, which can truly meet the user's good use effect in use and can improve some unsatisfactory points in the traditional structure. Through the design of the outer blade plus the upper and lower rings, the rigidity of the radiating blade can be improved, and when the fan is running, the airflow is smooth and free from the interference of the middle partition of the fan, thus improving the efficiency of the fan and reducing the noise. The computer fan is mainly composed of a base, a cooling fan and a cover. The center of the base is provided with an accommodating groove which can be correspondingly placed by a heat dissipation fan, and one side of the base is provided with an air outlet; characterized in that the cooling fan is provided with double rows of blades, and the number of the outer blades is larger than that of the inner blades; The inner blade is a part of the blade that extends inward, and the cross sections of the inner blade and the outer blade are smooth flow guiding curves after being connected, so as to increase the range and smoothness of the flow guiding. When the height of the inner blade is higher than that of the motor, it can extend across the top surface of the motor to enhance the rigidity of the structure and guide air volume.