CN213360476U - Axial fan structure and axial fan - Google Patents
Axial fan structure and axial fan Download PDFInfo
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- CN213360476U CN213360476U CN202021770503.4U CN202021770503U CN213360476U CN 213360476 U CN213360476 U CN 213360476U CN 202021770503 U CN202021770503 U CN 202021770503U CN 213360476 U CN213360476 U CN 213360476U
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Abstract
The utility model provides an axial fan structure and an axial fan, belonging to the technical field of fans, comprising a hub and a plurality of blades connected to the periphery of the hub, wherein the blades comprise an inner blade part connected with the hub and an outer blade part positioned at the outer edge of a flow guide; a bulge is arranged between the inner blade part and the outer blade part, the bulge is convex towards the air outlet surface of the blade, and a concave part is formed on the bulge corresponding to the leeward surface of the blade; the air outlet surface of the inner blade part is a concave curved surface, and the air outlet surface of the outer blade part is a concave curved surface; when the axial flow fan rotates forwards, the outer blade part deflects to the inner side to blow air and is mixed with the air outlet of the inner blade part; when the axial flow fan rotates reversely, the concave part increases the back air outlet area. The axial fan structure provided by the utility model can increase the air quantity and improve the cooling effect; the structural strength of the blade is enhanced, and the use performance is ensured; when the fan rotates reversely, the fan can generate air with sufficient air quantity, and has the function of bidirectional air outlet.
Description
Technical Field
The utility model belongs to the technical field of the fan, more specifically say, relate to an axial fan structure and axial fan.
Background
The principle of the electric fan is that the fan blades are driven to rotate by the motor, disturbed wind forms wind pressure between the fan blades and is blown out, cooling is brought to a user, and the purposes of cooling and relieving summer heat are achieved.
The air volume of the electric fan mainly depends on the shape of the fan blade, the existing fan blade usually adopts flat and inclined blades, the air volume is smaller and the noise is larger under the same power, the blown air is more dispersed, and the cooling effect is not good. Although the technology of electric fans has been mature and the use of electric fans has been very popular, improvements and breakthroughs are still needed to overcome the shortcomings of electric fans.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an axial fan structure aims at solving the current electric fan amount of wind little, the poor problem of cooling effect.
In order to achieve the above object, the utility model adopts the following technical scheme: providing an axial fan structure, comprising a hub and a plurality of blades connected to the periphery of the hub, wherein the blades comprise an inner blade part connected with the hub and an outer blade part at the outer edge of a flow guide; a bulge is arranged between the inner blade part and the outer blade part, the bulge is convex towards the air outlet surface of the blade, and a concave part is formed on the bulge corresponding to the leeward surface of the blade; the air outlet surface of the inner blade part is a concave curved surface, and the air outlet surface of the outer blade part is a concave curved surface; when the axial flow fan rotates forwards, the outer blade part deflects to the inner side to blow air, and the air is mixed with the air outlet of the inner blade part; when the axial flow fan rotates reversely, the concave part increases the back air outlet area.
As another embodiment of the present application, the projection is gradually reduced in width from a rear edge to a front edge of the blade.
As another embodiment of the present application, the two edges of the boss meet at a point to the leading edge of the blade.
As another embodiment of the present application, the recess gradually decreases in width from the rear edge to the front edge of the blade.
As another embodiment of the present application, the two edges of the depression meet at a point to the leading edge of the blade.
As another embodiment of the present application, the leeward surface of the outer blade portion is a convex curved surface.
As another embodiment of the present application, the leeward surface of the inner blade portion is a convex curved surface.
As another embodiment of the present application, the wind break angle of the blade is at the front end of the outer blade portion.
In another embodiment of the present application, the air outlet surface of the blade is set to be upward, the leeward surface of the blade is set to be downward, the upper tangent line of the blade is higher than the upper tangent line of the hub, and the lower tangent line of the blade is higher than the lower tangent line of the hub.
The utility model also provides an axial fan, include axial fan structure.
The utility model provides an axial fan structure and axial fan's beneficial effect lies in: compared with the prior art, the axial flow fan structure of the utility model has the advantages that the blades comprise the inner blade part positioned at the inner ring and the outer blade part positioned at the outer edge of the flow guide; be equipped with the bellying between interior blade portion and the outer blade portion, the bellying is protruding towards the air-out face of blade, and the bellying corresponds the leeward face formation depressed part of blade. When the fan rotates forwards, the inner blade part of the inner ring blows forwards linearly, the outer blade part of the blade at the outer edge of the flow guide deflects to the inner side to blow, and the outer blade part and the outlet air of the inner blade part are mixed, so that the outlet air is soft, the mixed air volume is increased, and the cooling effect is improved; the bulge part of the blade plays a role in connecting the inner blade part and the outer blade part, the structural strength of the blade can be enhanced, and the service performance is ensured; the convex part is a concave part on the leeward side of the blade, and when the fan rotates reversely, the fan can generate air with sufficient air quantity, so that the fan has the function of bidirectional air outlet.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an axial fan structure according to an embodiment of the present invention;
fig. 2 is a schematic top view (air outlet surface) of the axial fan structure shown in fig. 1;
FIG. 3 is a schematic bottom view (leeward side) of the axial fan structure shown in FIG. 1;
fig. 4 is a schematic perspective view of an axial fan structure according to an embodiment of the present invention.
In the figure: 1. a wind break angle; 2. a hub; 3. an inner blade portion; 4. a recessed portion; 5. an outer blade portion; 6. a boss portion; 7. a rear edge; 8. a front edge; 9. an outer edge; A. an upper tangent of the blade; B. an upper tangent of the hub; C. lower tangent lines of the blades; D. the lower tangent line of the hub.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4, the axial flow fan structure of the present invention will now be described. The axial flow fan structure comprises a hub 2 and a plurality of blades connected to the periphery of the hub 2, wherein each blade comprises an inner blade part 3 connected with the hub 2 and an outer blade part 5 positioned at the outer edge of a flow guide; a bulge part 6 is arranged between the inner blade part 3 and the outer blade part 5, the bulge part 6 is bulged towards the air outlet surface of the blade, and the bulge part 6 forms a concave part 4 corresponding to the leeward surface of the blade; the air outlet surface of the inner blade part 3 is a concave curved surface, and the air outlet surface of the outer blade part 5 is a concave curved surface; when the axial flow fan rotates forwards, the outer blade part 5 deflects to the inner side to blow air and is mixed with the outlet air of the inner blade part 3; when the axial flow fan rotates reversely, the concave portion 4 increases the back outlet air area.
Compared with the prior art, the axial flow fan structure provided by the utility model has the advantages that the blades comprise an inner blade part 3 positioned at the inner ring and an outer blade part 5 positioned at the outer edge of the flow guide; a bulge part 6 is arranged between the inner blade part 3 and the outer blade part 5, the bulge part 6 is convex towards the air outlet surface of the blade, and the bulge part 6 forms a concave part 4 corresponding to the leeward surface of the blade. The effects are as follows: firstly, when the fan rotates forwards, the inner blade part 3 of the inner ring blows forwards linearly, the outer blade part 5 of the blade at the outer edge of the flow guide deflects to the inner side to blow, and the air is mixed with the air outlet of the inner blade part 3, so that the air outlet is soft, the mixed air volume is increased, and the cooling effect is improved; secondly, due to the existence of the bulge part 6, the wind blowing forwards through the straight line is dispersed, and meanwhile, the outer blade part 5 at the outer edge blows inwards and is mixed with the wind discharged from the inner blade part 3, so that the force of the straight line wind blowing is dispersed, and the noise of the fan is reduced; thirdly, the bulge part 6 of the blade plays a role in connecting the inner blade part 3 and the outer blade part 5, the structural strength of the blade can be enhanced, and the service performance is ensured; and fourthly, the convex part 6 is a concave part 4 on the leeward side of the blade, and when the fan rotates reversely, the fan can generate air outlet with sufficient air volume, and has the function of positive and negative bidirectional air outlet.
Wherein, the outer edge 9 of the outer blade part 5 is a flow guide outer edge.
In the embodiment, the illustration shows 7 blades, and may also be 6 blades, 8 blades, etc., and is not limited to that shown in the embodiment.
As a specific embodiment of the axial fan structure provided by the present invention, please refer to fig. 2 to 3, the width of the protruding portion 6 decreases gradually from the rear edge 7 to the front edge 8 of the blade. The width of the bulge part 6 is gradually reduced from back to front by taking the positive rotation direction of the fan as the front and back direction, namely, the partition between the inner blade part 3 and the outer blade part 5 is gradually weakened, so that the outer blade part 5 at the outer edge is guided to blow air inwards.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 2 to 3, two edges of the protruding portion 6 converge to the front edge 8 of the blade to facilitate guiding the outer blade portion 5 at the outer edge to blow air inwards.
As a specific implementation of the embodiment of the present invention, referring to fig. 2 and 3, the width of the recess 4 gradually decreases from the rear edge 7 to the front edge 8 of the blade. When the fan rotates reversely, the surface area of the leeward side is increased due to the existence of the concave part 4, more air can be guided, and air outlet with sufficient air volume can be generated.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 2 to 3, two edges of the concave portion 4 converge to the front edge 8 of the blade to facilitate guiding the outer blade portion 5 at the outer edge to blow air inwards.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 4, the leeward surface of the outer blade portion 5 is a convex curved surface.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 4, the leeward side of the inner blade portion 3 is a convex curved surface.
In this embodiment, through the setting of concave curved surface and convex curved surface, the superficial area of increase air-out face and leeward face can make the amount of wind concentrate, increases the amount of wind, improves the cooling effect.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 2 to 3, when the fan rotates forward, the wind break angle 1 of the blade is at the front end of the outer blade portion 5.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1, the air outlet surface of the blade is used as the upper side, the leeward surface of the blade is used as the lower side, and the upper tangent line a of the blade is higher than the upper tangent line B of the hub: when the air is discharged in the positive direction, the part of the hub entering the air area is reduced, so that the windless area in the center of the fan is reduced; the lower tangent line C of the blade is higher than the lower tangent line D of the hub: the wind breaking angle is ensured to be positioned between the outer diameter of the hub and the external air duct, the wind breaking effect of the wind breaking angle is enhanced, and the air quantity is increased when the wind is positively discharged.
The utility model also provides an axial fan, include axial fan structure.
The utility model provides an axial fan owing to be equipped with bellying 6 between inner blade portion 3 and outer blade portion 5, bellying 6 is protruding towards the air-out face of blade, and 6 leeward faces that correspond the blade of bellying form depressed part 4 for axial fan has as follows: when the fan rotates forwards, the inner blade part 3 of the inner ring blows forwards linearly, the outer blade part 5 of the blade at the outer edge of the flow guide deflects to the inner side to blow and is mixed with the outlet air of the inner blade part 3, so that the outlet air is soft, the mixed air volume is increased, and the cooling effect is improved; due to the existence of the bulge part 6, the wind blowing forwards through the straight line is dispersed, and meanwhile, the outer blade part 5 at the outer edge blows inwards and is mixed with the wind discharged from the inner blade part 3, so that the force of the straight line wind blowing is dispersed, and the noise of the fan is reduced; the bulge part 6 of the blade plays a role in connecting the inner blade part 3 and the outer blade part 5, the structural strength of the blade can be enhanced, and the service performance is ensured; the convex part 6 is a concave part 4 on the leeward side of the blade, and can generate air outlet with sufficient air quantity when the fan rotates reversely, thereby having the function of positive and negative bidirectional air outlet.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An axial fan structure comprising a hub and a plurality of blades attached to the periphery of said hub, wherein said blades comprise an inner blade portion attached to said hub and an outer blade portion at the outer edge of the flow guide; a bulge is arranged between the inner blade part and the outer blade part, the bulge is convex towards the air outlet surface of the blade, and a concave part is formed on the bulge corresponding to the leeward surface of the blade; the air outlet surface of the inner blade part is a concave curved surface, and the air outlet surface of the outer blade part is a concave curved surface; when the axial flow fan rotates forwards, the outer blade part deflects to the inner side to blow air, and the air is mixed with the air outlet of the inner blade part; when the axial flow fan rotates reversely, the concave part increases the back air outlet area.
2. The axial fan structure of claim 1, wherein the protrusion is gradually reduced in width from the rear edge to the front edge of the blade.
3. The axial fan structure of claim 2, wherein two edges of the boss converge to a point at a front edge of the blade.
4. The axial fan structure of claim 1, wherein the recess is gradually reduced in width from a rear edge to a front edge of the blade.
5. The axial fan structure of claim 4, wherein two edges of the recess converge to a point at a front edge of the blade.
6. The axial fan structure of claim 1, wherein the leeward surface of the outer blade portion is convexly curved.
7. The axial fan structure of claim 1, wherein the leeward surface of the inner blade portion is convexly curved.
8. The axial fan structure of claim 1, wherein a wind break angle of the blade is at a front end of the outer blade portion.
9. The axial fan structure according to claim 1, wherein an upper tangential line of the blade is higher than an upper tangential line of the hub, and a lower tangential line of the blade is higher than an lower tangential line of the hub, with an air outlet surface of the blade being an upper surface and a leeward surface of the blade being a lower surface.
10. An axial fan comprising the axial fan structure of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021770503.4U CN213360476U (en) | 2020-08-21 | 2020-08-21 | Axial fan structure and axial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021770503.4U CN213360476U (en) | 2020-08-21 | 2020-08-21 | Axial fan structure and axial fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213360476U true CN213360476U (en) | 2021-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021770503.4U Active CN213360476U (en) | 2020-08-21 | 2020-08-21 | Axial fan structure and axial fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213360476U (en) |
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2020
- 2020-08-21 CN CN202021770503.4U patent/CN213360476U/en active Active
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