Cooling fan

Abstract

The invention relates to a cooling fan for cooling electronic equipment. The cooling fan comprises a casing, a motor and an impeller, wherein the casing is used for holding and supporting the motor and the impeller, the motor is provided with a circuit substrate, a lead and the bottom surface of the circuit substrate are connected to a connecting point D, and the impeller is provided with a cup-shaped portion and a plurality of blades radially extending outwards from the outer circumferential surface of the cup-shaped portion. Each blade is provided with a radial inner edge, a radial outer edge and an axial bottom edge, wherein the radial inner edge is provided with a first axial lower end A, the radial outer edge is provided with a third axial lower end C, and the axial bottom edge extends between the first axial lower end A and the third axial lower end C and is provided with a second axial lower end B, at least part of the axial bottom edge is axially arranged below the connecting point D, and the second axial lower end B is arranged on the radial outer side of the first axial lower end A and below the axial outer side. Thus, the blades are prevented from contacting with the leads when the blades are enlarged and air quantity is increased.

Description

technical field [0001] The present invention generally relates to a cooling fan, and more particularly, to an axial flow fan for cooling electronic equipment, the impeller blades of which are configured not to interfere with wires located below the blades. Background technique [0002] Cooling fans are used in many electronic devices (especially personal computers or servers) to dissipate the heat generated by these devices during operation. Typically, this type of cooling fan includes a motor consisting of a stator portion and a rotor portion, an impeller with a plurality of blades, and a housing. The housing includes: a body forming a cavity open at both ends and having inlet and outlet ends for housing the motor and impeller; a base centered at the outlet end of the body for supporting the stator portion of the motor; a Multiple ribs. An impeller is attached to the rotor portion and is rotatable with the rotor portion when energized to the motor so that the airflow ente...

AI Technical Summary

Problems solved by technology

That is, a portion of the wire on the radially inner side extends above the rib, making it difficult to maintain the distance between the lower end of the blade and the wire

And because of the following several reasons, the problem that the distance between the lower end of the above-mentioned blade and the lead is difficult to maintain has been exacerbated:

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