Air supply device and fan

Abstract

The invention discloses an air supply device and a fan, the air supply device comprises a mesh enclosure, and rotatable blades are arranged in the mesh enclosure; wing ribs are arranged on the suction surfaces of the blades and extend from the blade tips to the rear edges of the blades, so that the blades rotate and deform, the wing ribs can slide relative to the ribs of the mesh enclosure, and gaps are kept between the blades and the mesh enclosure through sliding transition between the wing ribs and the mesh enclosure. The wing rib is designed on the back of the top of the fan blade, the shape of the fan blade is optimized, the strength of the fan is improved, operation deformation of the fan blade is improved, direct friction breakage of the fan blade and the mesh enclosure is prevented, the safety performance is improved, the cost of the air supply device is reduced, the optimal installation size of the fan blade and the mesh enclosure is guaranteed, and the size of the air supply device is effectively prevented from being increased.

Description

technical field [0001] The invention belongs to the field of air supply, in particular to an air supply device and a fan. Background technique [0002] A fan, also known as a fan, is a household appliance that uses a motor to drive the blades to rotate to accelerate the circulation of air. It is mainly used for cooling, relieving heat and circulating air. [0003] The current fan mainly includes three parts: a base, a fuselage and a machine head. The machine head is erected on the base through the fuselage, and the air flow is accelerated by the rotating fan blades through the machine head to achieve the effect of cooling. [0004] However, the existing fan air supply devices generally use a combination of sheet-type fan blades and metal mesh covers to achieve air supply through the rotation of the fan blades. The blade shape of ordinary axial flow fan blades mostly adopts sheet-type continuous smooth curved surfaces. , the best installation distance between the fan blade ...

AI Technical Summary

Problems solved by technology

[0004] However, the existing fan air supply devices generally use a combination of sheet-type fan blades and metal mesh covers to achieve air supply through the rotation of the fan blades. Ordinary axial-flow fan blades mostly use thin-sheet continuous smooth curved surface shapes. Generally speaking , the best installation distance between the fan blades and the ribs of the rear grille is 30mm. When the rotating speed is high, the fan blades will have a certain rotational deformation, and the twist angle will become larger. The running deformation of the fan blades is 37mm, and the drop deformation is 60mm. Sometimes the blades of the fan are easy to rub against the rear grille, and in serious cases, the blades will be inserted into the gaps in the mesh of the grille and cause the blades to break. According to after-sales feedback, this type of fan has certain safety hazards

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