Axial-flow fan blade capable of preventing winding of foreign matters and high-speed fan

Abstract

The axial flow fan blade and the high-speed fan capable of preventing the foreign matter from being wound comprise a fan blade hub and a rotating shaft installation boss, the rotating shaft installation boss and the fan blade hub are coaxially and integrally formed, a transition boss is arranged between the rotating shaft installation boss and the fan blade hub in the axial direction, and the rotating shaft installation boss and the fan blade hub are coaxially and integrally formed. The transition boss is a rotating body formed by rotating around the right-angle waist of a right trapezoid or a rotating body formed by rotating an arc around the axis of the rotating shaft, and the size of the cross section between the rotating shaft mounting boss and the transition boss is smaller than the size of the cross section between the transition boss and the fan blade hub. Due to the fact that the radius of the cross section of the transition boss is increased, curled hair cannot be wound and stacked like a traditional hair drier, the curled hair can be easily scattered and drawn out, and the technical problem that a user is injured due to the fact that the hair is easily sucked and curled to be long through an impeller of a traditional hair drier and the curled hair is stacked to be thick is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of high -speed fan especially relates to a prevent foreign matter to entwine's axial flow fan blade and high -speed fan. BACKGROUND

[0002] In the field of small hair dryer, the air inlet end is easy to entangle foreign matter and has been a prominent problem. The traditional hair dryer air inlet position is usually provided with a filter screen of plastic or metal material, however, its hole is generally too large, which is difficult to effectively block foreign matter, so that foreign matter is easily entered during use, affecting the performance of the hair dryer. For example, a hair dryer preventing foreign matter (publication number CN22096666U) proposes to set an air inlet net at the air inlet of the hair dryer main body, the air inlet net has a plurality of air inlet holes, and a fine filter screen is arranged in the air inlet hole. By this way, the probability of large-size foreign matter entering can be reduced, but during the use of the hair dryer, hair may be sucked into the hair dryer. At this time, the filter screen blocks the convenience of removing the hair foreign matter. Moreover, due to the high-speed rotation of the impeller, the length of the sucked hair will become longer and longer, and many layers and circles will be rolled, which may cause injury to the user. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies of the prior art, the utility model provides a prevent foreign matter to entwine's axial flow fan blade and high -speed fan, solves the technical problem that the impeller is easy to suck the hair into the long and thick hair during the use of the traditional high -speed fan.

[0004] The utility model discloses a prevent foreign matter to entwine's axial flow fan blade through the following technical scheme and realizes the above-mentioned purpose: a prevent foreign matter to entwine's axial flow fan blade, including the fan wheel hub, the rotation axis installation boss, the outer surface of fan wheel hub evenly is provided with a plurality of blades, rotation axis installation boss with Fan wheel hub coaxial integral molding, rotation axis installation boss with Fan wheel hub sets up the axle hole that passes through the rotation axis, the axial direction between rotation axis installation boss with Fan wheel hub is provided with the transition boss, the transition boss is the rotation body that the right angle waist of around right angle trapezoidal rotates forms or the rotation body that the arc around rotation axis axis rotates forms, the cross section size between rotation axis installation boss with The cross section size between transition boss and fan wheel hub.

[0005] As preferably, the rotation body that the arc around rotation axis axis rotates forms is the concave arc around rotation axis axis rotates or the convex arc around rotation axis axis rotates.

[0006] As preferably, the fan wheel hub, the transition boss and the rotation axis installation boss are integrally formed, and the abutment surfaces between each two adjacent ones are smoothly transitioned.

[0007] As preferably, the fan wheel hub is a hollow cylindrical surface with one end face.

[0008] Preferably, the rotating shaft mounting boss is arranged outside the end face of the fan blade hub, the side where the rotating shaft mounting boss is located is the air inlet end, and the rotating shaft mounting boss, the transition boss and the end face of the fan blade hub are the windward faces.

[0009] Preferably, the blade end of the blade at the air inlet end is in a blade edge type structure.

[0010] Preferably, the blade edge type structure has a blade edge in a continuous undulating wave shape or a flat blade edge.

[0011] Preferably, the thickness of the blade end of the blade edge type structure is not more than 0.3 mm.

[0012] A high-speed fan comprising the above-mentioned axial fan blade capable of preventing foreign matter from being entangled, a casing, a stator assembly and a rotor assembly, wherein the rotor assembly comprises a rotating shaft, the rotating shaft, the casing and the central axis of the axial fan blade are coincident, and the rotating shaft passes through the shaft hole of the axial fan blade and is fixedly connected.

[0013] Preferably, the casing comprises an inner casing and an outer casing arranged coaxially, a plurality of mounting cavities are arranged adjacent to the inside of the inner casing, the mounting cavities comprise a bearing chamber and a stator mounting cavity, and a plurality of stationary blades are arranged between the inner casing and the outer casing.

[0014] Compared with the prior art, the high-speed fan has the following beneficial effects:

[0015] The axial fan blade capable of preventing foreign matter from being entangled and the high-speed fan disclosed by the utility model have the advantages that the axial fan blade comprises a fan blade hub, a rotating shaft mounting boss, the outer surface of the fan blade hub is uniformly provided with a plurality of blades, the rotating shaft mounting boss and the fan blade hub are coaxially integrally formed, a transition boss is arranged between the axial direction of the rotating shaft mounting boss and the fan blade hub, the transition boss is a rotation body formed by rotating a right-angle waist around a right-angle trapezoid or a rotation body formed by rotating an arc around the rotating shaft axis, the cross-sectional dimension between the rotating shaft mounting boss and the transition boss is smaller than the cross-sectional dimension between the transition boss and the fan blade hub, when hair is entangled, the entangled hair cannot be entangled and stacked like the fan blade of a conventional hair dryer due to the increase of the cross-sectional radius of the transition boss, the entangled hair can be easily scattered and extracted, the user is prevented from being injured, the blades with the blade edge type end are combined, foreign matter can be easily cut, and the technical problem that the user is injured due to the long entangled hair and the thick stacked entangled hair caused by the impeller of a conventional high-speed fan during use is solved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced.

[0017] Fig. 1 is the front view of the axial flow fan blade of the present application for preventing foreign matter from winding.

[0018] Fig. 2 is the left view of the axial flow fan blade of the present application for preventing foreign matter from winding.

[0019] Fig. 3 is the A-A cross-sectional view of the high-speed fan in the embodiment of the present application.

[0020] Reference signs: 1 - fan blade hub; 11 - blade; 2 - rotating shaft mounting boss; 21 - shaft hole; 3 - transition boss; 4 - machine shell; 41 - inner shell; 42 - outer shell; 5 - stator assembly; 6 - rotating shaft. DETAILED DESCRIPTION

[0021] The present application will be further described below in conjunction with the drawings and specific embodiments, but the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Please refer to Figs. 1 to 3The utility model provides a high -speed fan with prevent foreign matter to entwine axial flow fan blade, including axial flow fan blade, casing 4, stator assembly 5, rotor assembly, the rotor assembly includes the axle 6 and rotor magnet, the rotor magnet is the part of rotation in high -speed motor, is composed of permanent magnet, under the action of the magnetic field that stator assembly generates, rotor magnet will receive the electromagnetic force and rotate to output mechanical energy, the rotor magnet is fixed in the inside cavity of stator assembly 5 on axle 6, one end of axle 6 passes through casing 4 and is fixedly connected fan blade, rotor assembly rotation drives fan blade high -speed rotation, and then inhale air and form the air inlet end, the fan blade includes fan blade hub 1 and blade 11, and the blade is airfoil or circular arc, the outer surface of fan blade hub 1 evenly sets up a plurality of blades 11, and the fan blade hub 1 includes an end face and hollow cylinder, the end face of fan blade hub 1 is windward face, the end face of fan blade hub 1 is provided with the axle mounting boss 2 of smaller diameter in the middle part, the axle mounting boss 2 and the end face between fan blade hub 1 have transition boss 3, and the transition boss 3 is the inclined plane rotary body boss from the one end edge of axle mounting boss 2 transition to the windward face of fan blade hub 1, that is, the transition boss 3 is the rotary body formed by the rotation of right angle waist around right angle trapezoid, the outer surface between two two of fan blade hub 1, axle mounting boss 2, transition boss 3 is smoothly transitioned, the diameter size of transition boss 3 increases along with the direction of airflow, the cross section size between axle mounting boss 2 and transition boss 3 is smaller than the cross section size between transition boss 3 and fan blade hub 1, when the situation of hair being rolled in occurs, because the cross section radius of transition boss 3 is larger, the hair that is rolled in can not be wound like the fan blade of traditional hair dryer, so that the hair that is rolled in is easy to scatter and extract, avoids the user being injured.

[0023] Further, the fan blade hub 1, the axle mounting boss 2, the transition boss 3 are integrally formed and provided with an axle hole for the axle 6 to pass through at the position of the central axis, the axle 6, the casing 4 and the central axis of the axial flow fan blade coincide, the axle 6 passes through the axle hole and is fixedly connected.

[0024] Further, the blade 11 is a knife edge structure at the blade end of the air inlet end, the knife edge structure has a continuous undulating wave-shaped edge or a flat edge, the thickness of the blade end of the knife edge structure is not more than 0.3mm.

[0025] Further, the casing 4 includes an inner casing 41 and an outer casing 42 coaxially arranged, a plurality of mounting cavities are arranged adjacent to the inside of the inner casing 41, the mounting cavities include a bearing chamber and a stator mounting cavity, a plurality of stationary vanes are arranged between the inner casing 41 and the outer casing 42.

[0026] In another embodiment, the transition boss 3 is a rotating body formed by an arc rotating around the axis of the rotating shaft 6; the rotating body formed by the arc rotating around the axis of the rotating shaft 6 is a concave arc rotating around the axis of the rotating shaft or a convex arc rotating around the axis of the rotating shaft, and the cross-sectional dimension between the rotating shaft mounting boss 2 and the transition boss 3 is smaller than the cross-sectional dimension between the transition boss 3 and the fan blade hub 1.

[0027] The above only lists the specific embodiments of the present application. Obviously, the present application is not limited to the above embodiments, and can have many similar modifications, and all modifications directly derived or thought from the disclosed content by those of ordinary skill in the art should be considered as falling within the scope of the present application.

Claims

1. A propeller blade for preventing foreign matter from being entangled, characterized by comprising: The fan blade hub (1) is provided with a plurality of blades (11) on the outer surface, the rotating shaft mounting boss (2) and the fan blade hub (1) are coaxial and integrally formed, the rotating shaft mounting boss (2) and the fan blade hub (1) are provided with an axial hole (21) through the rotating shaft, the transition boss (3) is provided between the rotating shaft mounting boss (2) and the fan blade hub (1), the transition boss (3) is a rotating body formed by rotating a right-angle waist around a right-angle trapezoid or a rotating body formed by rotating an arc around the rotating shaft axis, and the cross-sectional dimension between the rotating shaft mounting boss (2) and the transition boss (3) is smaller than the cross-sectional dimension between the transition boss (3) and the fan blade hub (1).

2. The axial fan blade of claim 1, wherein, The rotating body formed by rotating an arc around the rotating shaft axis is formed by rotating a concave arc around the rotating shaft axis or rotating a convex arc around the rotating shaft axis.

3. The axial flow fan blade for preventing foreign matter entanglement as described in claim 1, characterized in that, The fan blade hub (1), the transition boss (3) and the rotating shaft mounting boss (2) are integrally formed, and the connecting surfaces between two adjacent ones are smoothly connected.

4. The axial fan blade of claim 1, wherein The fan blade hub (1) is a hollow cylindrical surface with one end surface.

5. The anti-debris-winding axial flow fan blade according to claim 4, wherein, The rotating shaft mounting boss (2) is arranged outside the end surface of the fan blade hub (1), one side of the rotating shaft mounting boss (2) is an air inlet end, and the end surface of the rotating shaft mounting boss (2), the transition boss (3) and the fan blade hub (1) is a windward surface.

6. The anti-debris-winding axial flow fan blade according to claim 5, wherein, The blade end of the blade (11) at the air inlet end is in a blade edge structure.

7. The anti-debris-winding axial flow fan blade according to claim 6, wherein The blade edge structure has a continuous undulating wave-shaped blade edge or a flat blade edge.

8. The anti-debris-winding axial flow fan blade according to claim 6, wherein, The thickness of the blade end of the blade edge structure is not more than 0.3 mm.

9. A high speed fan characterized by The fan blade hub (1) is provided with a plurality of blades (11) on the outer surface, the rotating shaft mounting boss (2) and the fan blade hub (1) are coaxial and integrally formed, the rotating shaft mounting boss (2) and the fan blade hub (1) are provided with an axial hole (21) through the rotating shaft, the transition boss (3) is provided between the rotating shaft mounting boss (2) and the fan blade hub (1), the transition boss (3) is a rotating body formed by rotating a right-angle waist around a right-angle trapezoid or a rotating body formed by rotating an arc around the rotating shaft axis, and the cross-sectional dimension between the rotating shaft mounting boss (2) and the transition boss (3) is smaller than the cross-sectional dimension between the transition boss (3) and the fan blade hub (1).

10. The high speed fan of claim 9, wherein, The rotating body formed by rotating an arc around the rotating shaft axis is formed by rotating a concave arc around the rotating shaft axis or rotating a convex arc around the rotating shaft axis. The fan blade hub (1), the transition boss (3) and the rotating shaft mounting boss (2) are integrally formed, and the connecting surfaces between two adjacent ones are smoothly connected. The fan blade hub (1) is a hollow cylindrical surface with one end surface. The rotating shaft mounting boss (2) is arranged outside the end surface of the fan blade hub (1), one side of the rotating shaft mounting boss (2) is an air inlet end, and the end surface of the rotating shaft mounting boss (2), the transition boss (3) and the fan blade hub (1) is a windward surface. The blade end of the blade (11) at the air inlet end is in a blade edge structure. The blade edge structure has a continuous undulating wave-shaped blade edge or a flat blade edge. The thickness of the blade end of the blade edge structure is not more than 0.3 mm. The fan blade hub (1) is provided with a plurality of blades (11) on the outer surface, the rotating shaft mounting boss (2) and the fan blade hub (1) are coaxial and integrally formed, the rotating shaft mounting boss (2) and the fan blade hub (1) are provided with an axial hole (21) through the rotating shaft, the transition boss (3) is provided between the rotating shaft mounting boss (2) and the fan blade hub (1), the transition boss (3) is a rotating body formed by rotating a right-angle waist around a right-angle trapezoid or a rotating body formed by rotating an arc around the rotating shaft axis, and the cross-sectional dimension between the rotating shaft mounting boss (2) and the transition boss (3) is smaller than the cross-sectional dimension between the transition boss (3) and the fan blade hub (1). The rotating body formed by rotating an arc around the rotating shaft axis is formed by rotating a concave arc around the rotating shaft axis or rotating a convex arc around the rotating shaft axis. The fan blade hub (1), the transition boss (3) and the rotating shaft mounting boss (2) are integrally formed, and the connecting surfaces between two adjacent ones are smoothly connected. The fan blade hub (1) is a hollow cylindrical surface with one end surface. The rotating shaft mounting boss (2) is arranged outside the end surface of the fan blade hub (1), one side of the rotating shaft mounting boss (2) is an air inlet end, and the end surface of the rotating shaft mounting boss (2), the transition boss (3) and the fan blade hub (1) is a windward surface. The blade end of the blade (11) at the air inlet end is in a blade edge structure. The blade edge structure has a continuous undulating wave-shaped blade edge or a flat blade edge. The thickness of the blade end of the blade edge structure is not more than 0.3 mm.

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