Fan blade and fan

Abstract

The utility model belongs to the field of gas driving devices, and particularly provides a fan blade and a fan. The utility model aims to solve the problem that the uniformity of airflow provided by the existing fan blade is poor. The fan blades comprise a plurality of outer-layer blades, a plurality of middle-layer blades and a plurality of middle-layer blades. And the plurality of middle-layer blades are arranged on the inner sides of the plurality of outer-layer blades along the radial direction. The inner-layer blades are arranged on the inner sides of the middle-layer blades in the radial direction, and the inner-layer blades are centrifugal blades. When the fan blades rotate, three air flows can be provided, and the three air flows can be mutually entangled and mixed, so that the air flows are more uniform, and the technical problems are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of gas drive device, specifically provides a fan blade and fan. BACKGROUND

[0002] In the fan technical field, the design of fan blade plays a crucial role in the performance of the fan. Traditional fans usually adopt a single-layer or double-layer evenly arranged blade structure. These blades will drive air flow when rotating to generate air flow, thereby achieving the purpose of heat dissipation or ventilation. However, with the development of technology and the increasing demand for fan performance, traditional fan blades have gradually exposed some problems.

[0003] For example, a single-layer blade fan produces sufficient air volume, but the air flow is concentrated, and the user experience is poor. Although the double-layer blade fan improves the concentration of air flow to some extent, it still has the phenomenon of uneven air flow distribution. SUMMARY

[0004] One purpose of the utility model is to solve the problem of poor air flow uniformity provided by the existing fan blade.

[0005] To achieve the above purpose, the utility model provides a fan blade in the first aspect, comprising:

[0006] a plurality of outer blades;

[0007] a plurality of middle blades, arranged radially on the inner side of the plurality of outer blades;

[0008] a plurality of inner blades, arranged radially on the inner side of the plurality of middle blades, and the inner blades are centrifugal blades.

[0009] Optionally, the number of inner blades is greater than the number of outer blades, and the number of outer blades is greater than the number of middle blades.

[0010] Optionally, the number of inner blades is even; and / or, the number of outer blades and the number of middle blades is odd.

[0011] Optionally, the number of outer blades is 3N, the number of outer blades is 2N-1, and the number of inner blades is 4N; wherein N is a natural number.

[0012] Optionally, the number of outer blades is 9, the number of middle blades is 5, and the number of inner blades is 12.

[0013] Optionally, the helix angle of the outer blade is greater than the helix angle of the middle blade.

[0014] Optionally, the fan blade further comprises an outer fixed ring fixedly connected or integrally formed with the radially inner end of each of the outer layer blades through the outer side thereof, and the outer fixed ring is fixedly connected or integrally formed with the radially outer end of each of the middle layer blades through the inner side thereof; and / or the fan blade further comprises a middle fixed ring fixedly connected or integrally formed with the radially inner end of each of the middle layer blades through the outer side thereof, and the middle fixed ring is fixedly connected or integrally formed with the radially outer end of each of the inner layer blades through the inner side thereof; and / or the fan blade further comprises a central hub fixedly connected or integrally formed with the radially inner end of each of the inner layer blades through the outer side thereof; the central hub is provided with a connecting hole for connecting an external driving shaft.

[0015] Optionally, the fan blade is a fan blade of a fan.

[0016] The utility model provides a fan in the second aspect, comprising the fan blade of any one in the first aspect.

[0017] Optionally, the fan is a table fan, a floor fan, a ceiling fan or a ceiling fan.

[0018] Based on the foregoing description, those skilled in the art can understand that, in the technical solutions of the foregoing embodiments of the utility model, by arranging the fan blade into three layers of outer, middle and inner blades and arranging the inner layer blades into centrifugal blades, the fan blade can provide three air flows when rotating, and the three air flows can be intertwined and mixed, so that the air flow is more uniform. In particular, the centrifugal blades of the inner layer can drive the air flow to move radially outward, so as to disperse the air flows driven by the outer layer blades and the middle layer blades, and the air flow driven by the fan blade is more uniform as a whole. Therefore, the fan blade of the utility model improves the uniformity of the air flow.

[0019] Further, by arranging the number of inner layer blades to be greater than the number of outer layer blades and the number of outer layer blades to be greater than the number of middle layer blades, the number of air flows between adjacent two layers is different, and the air flows can be mixed in a staggered manner, so that the uniformity of the air flow is further improved.

[0020] Further, by arranging the helix angle of the outer layer blades to be greater than the helix angle of the middle layer blades, the air flow of the outer layer and the air flow of the middle layer have different wind speeds in the axial direction, so that the fan blows air at different distances, and the air flow is also more uniformly distributed in the axial direction of the fan blade.

[0021] Other beneficial effects of the utility model will be described in detail in the following with reference to the drawings, so that those skilled in the art can more clearly understand the improvement purposes, features and advantages of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present application, hereinafter, some embodiments of the present application will be described with reference to the accompanying drawings. It should be understood by those skilled in the art that the components or parts indicated by the same reference signs in different drawings are the same or similar; the drawings of the present application are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 is a first perspective view of a fan blade in some embodiments of the present application;

[0024] Figure 2 is a second perspective view of a fan blade in some embodiments of the present application;

[0025] Figure 3 is an axial plan view of a fan blade in some embodiments of the present application;

[0026] Figure 4 is an effect schematic view of a fan in some other embodiments of the present application.

[0027] Legend of reference signs:

[0028] 001, fan;

[0029] 100, fan blade; 111, outer blade; 112, outer fixed ring; 121, middle blade; 122, middle fixed ring; 131, inner blade; 132, center hub; 1321, connecting hole; 1322, reinforcing rib;

[0030] 200, fan head; 210, drive shaft;

[0031] 300, base;

[0032] 400, connecting rod. DETAILED DESCRIPTION

[0033] It should be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present application, not all embodiments of the present application, and the part of the embodiments are intended to explain the technical principles of the present application, not to limit the protection scope of the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those skilled in the art without creative labor should still fall within the protection scope of the present application.

[0034] It should be noted that in the description of the utility model, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the corresponding device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] Further, it should be further noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. For example, the terms "mounting", "connection", "connection" and "fixing" can be bolted, screwed, welded, inserted, riveted, fused, clamped or any other feasible connection form without special description.

[0036] As shown in Figures 1 to 3 In some embodiments of the utility model, the fan blade 100 includes a plurality of outer blades 111, a plurality of middle blades 121 and a plurality of inner blades 131. The plurality of middle blades 121 are arranged radially on the inner side of the plurality of outer blades 111. The plurality of inner blades 131 are arranged radially on the inner side of the plurality of middle blades 121, and the inner blades 131 are centrifugal blades.

[0037] Those skilled in the art can understand that the outer blades 111, the middle blades 121 and the inner blades 131 can produce three different air flows when the fan blade 100 rotates, and these air flows are intertwined and mixed, which significantly improves the uniformity of the air flow.

[0038] Among them, the outer blade 111 is located at the outermost side of the fan blade 100 in the radial direction, and is the main component for driving air to form the outermost air flow, which can affect the coverage range and intensity of the overall air flow.

[0039] Among them, the middle blades 121 are arranged radially on the inner side of the plurality of outer blades 111, and the generated air flow interacts with the air flow generated by the outer blades 111, which can optimize the distribution of the air flow.

[0040] The inner layer blades 131 are arranged at the inner side of the plurality of middle layer blades 121 in the radial direction, and the special structure of the centrifugal blades enables the air flow to move outward in the radial direction when rotating, so as to disperse the air flow driven by the outer layer blades 111 and the middle layer blades 121, and make the air flow driven by the fan blade 100 more uniform as a whole.

[0041] Further, the number of the inner layer blades 131 is greater than the number of the outer layer blades 111, and the number of the outer layer blades 111 is greater than the number of the middle layer blades 121. The difference in the number makes the number of air flow between the adjacent two layers different, and enables the air flow to be staggered and mixed.

[0042] For example, when the outer layer blades 111 generate 9 air flows, the middle layer blades 121 generate 5 air flows, and the inner layer blades 131 generate 12 air flows, the air flows with different numbers are interwoven, which greatly improves the uniformity of the air flow.

[0043] Further, the number of the inner layer blades 131 is even; and / or, the number of the outer layer blades 111 and the number of the middle layer blades 121 are odd.

[0044] Further optionally, the number of the outer layer blades 111 is 3N, the number of the outer layer blades 111 is 2N-1, and the number of the inner layer blades 131 is 4N. Wherein, N is a natural number. For example, N can be 3, 4, 5, 7, etc. Any feasible value, for example, as follows.

[0045] When N=3, the number of the outer layer blades 111 is 9, the number of the middle layer blades 121 is 5, and the number of the inner layer blades 131 is 12.

[0046] When N=4, the number of the outer layer blades 111 is 12, the number of the middle layer blades 121 is 7, and the number of the inner layer blades 131 is 16.

[0047] When N=5, the number of the outer layer blades 111 is 15, the number of the middle layer blades 121 is 9, and the number of the inner layer blades 131 is 20.

[0048] Further, in some embodiments of the utility model, the helix angle of the outer layer blades 111 is greater than the helix angle of the middle layer blades 121. The different helix angles make the air flow of the outer layer and the air flow of the middle layer have different wind speeds in the axial direction. The larger helix angle of the outer layer blades 111 can make the air flow have a longer propagation distance in the axial direction, and the smaller helix angle of the middle layer blades 121 makes the air flow diffuse in a shorter distance. In this way, the blowing of the fan 001 at different distances is realized, and the air flow is also more uniformly distributed in the axial direction of the fan blade 100.

[0049] For example, Figures 1 to 3As shown, in some embodiments of this utility model, the fan blade 100 also includes an outer fixing ring 112, a middle fixing ring 122 and a central hub 132. These fixing structures can not only connect and fix the blades of each layer, but also enhance the overall strength and stability of the fan blade 100.

[0050] from Figures 1 to 3 As can be seen, the outer fixing ring 112 is fixedly connected to the radially inner end of each outer blade 111 via its outer surface or is integrally formed therein. The outer fixing ring 112 is fixedly connected to the radially outer end of each middle blade 121 via its inner surface or is integrally formed therein. This connection method allows the outer blade 111 and the middle blade 121 to form a relatively stable whole, reducing the vibration and deformation of the blades during high-speed rotation.

[0051] from Figures 1 to 3 It can also be seen that the middle layer fixing ring 122 is fixedly connected to or integrally formed with the radially inner end of each middle layer blade 121 via its outer side, and is fixedly connected to or integrally formed with the radially outer end of each inner layer blade 131 via its inner side. This connection method strengthens the connection between the middle layer blade 121 and the inner layer blade 131, and enhances the overall structure of the fan blade 100.

[0052] from Figures 1 to 3 It can also be seen that the central hub 132 is fixedly connected to the radial inner end of each inner blade 131 through its outer side or is integrally formed.

[0053] Furthermore, the center hub 132 is provided with a connecting hole 1321 for connecting an external drive shaft 210 (e.g., Figure 4 (as shown), thereby enabling the fan blade 100 to be driven.

[0054] from Figures 1 to 3 As can be seen, the connecting hole 1321 is a D-shaped hole.

[0055] In addition, in other embodiments of this utility model, those skilled in the art can also set the connecting hole 1321 in any other feasible form as needed, such as a plum blossom hole, a conical hole, a triangular hole, an elliptical hole, etc.

[0056] like Figure 2 As shown, in some embodiments of this utility model, the interior of the central hub 132 is provided with reinforcing ribs 1322 to enhance the strength of the central hub 132 and reduce the material of the central hub 132.

[0057] Those skilled in the art will understand that the reinforcing rib 1322 can effectively disperse the stress borne by the central hub 132 and prevent it from being damaged during high-speed rotation.

[0058] The fan blade 100 described in the foregoing of the utility model is the fan blade of the fan 001, that is, the fan 001 of the utility model can be applied to the fan 001. The following will be exemplified with reference to Figure 4 .

[0059] As shown in Figure 4 , in some other embodiments of the utility model, the fan 001 comprises the fan blade 100, the fan head 200, the base 300 and the connecting rod 400.

[0060] Among them, the fan blade 100 is as described in the foregoing.

[0061] Among them, the fan head 200 is provided with a driving motor (not marked in the figure), and the driving shaft 210 of the driving motor extends out of the fan head 200 and is inserted together with the connecting hole 1321 of the fan blade 100, so that the driving motor drives the fan blade 100 to rotate.

[0062] Among them, the base 300 is used to be placed on the desktop or the ground to support the fan 001.

[0063] Among them, the connecting rod 400 is used to connect the base 300 and the fan head 200 together, so that the fan head 200 has a certain height.

[0064] When the fan 001 is connected to the power supply, the driving motor starts to work, and the fan blade 100 is driven to rotate at high speed through the driving shaft 210. The outer blade 111, the middle blade 121 and the inner blade 131 of the fan blade 100 generate three different airflows respectively. The airflow generated by the outer blade 111 covers a larger range, which can blow the air to a farther distance; the airflow generated by the middle blade 121 spreads in a shorter distance, and is supplemented by the outer airflow. The centrifugal blade of the inner layer drives the airflow to move outward along the radial direction, disperses the airflows of the outer layer and the middle layer, so that the three airflows are intertwined and mixed. This unique airflow mixing mode makes the airflow blown by the fan 001 more uniform, and the user can feel a more comfortable blowing experience in the use process.

[0065] Those skilled in the art can understand that, Figure 4 The fan 001 shown in the middle can be a table fan or a floor fan.

[0066] In addition, in other embodiments of the utility model, those skilled in the art can also set the fan 001 as a ceiling fan or a top fan according to the needs.

[0067] In summary, the fan blade 100 and the fan 001 having the same realize differentiated layered flow guiding in the axial direction and the radial direction through the wind distribution blades.

[0068] Thus far, the technical solutions of the present application have been described in combination with the foregoing embodiments, but it will be readily understood by those skilled in the art that the protection scope of the present application is not limited to these specific embodiments. Without deviating from the technical principles of the present application, those skilled in the art can disassemble and combine the technical solutions in the foregoing embodiments, or can make equivalent changes or replacements to the related technical features, and any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present application will fall within the protection scope of the present application.

Claims

1. A fan blade, characterized in that, The fan blade comprises: a plurality of outer layer blades; a plurality of middle layer blades arranged radially inside the plurality of outer layer blades; a plurality of inner layer blades arranged radially inside the plurality of middle layer blades, and the inner layer blades are centrifugal blades.

2. The fan blade according to claim 1, wherein: the number of the inner layer blades is greater than the number of the outer layer blades, and the number of the outer layer blades is greater than the number of the middle layer blades.

3. The fan blade according to claim 2, wherein: the number of the inner layer blades is even; and / or the number of the outer layer blades and the number of the middle layer blades are odd.

4. The fan blade according to claim 2, wherein: the number of the outer layer blades is 3N, the number of the outer layer blades is 2N-1, and the number of the inner layer blades is 4N; wherein N is a natural number.

5. The fan blade according to claim 4, wherein: the number of the outer layer blades is 9, the number of the middle layer blades is 5, and the number of the inner layer blades is 12.

6. The fan blade according to claim 1, wherein: the helix angle of the outer layer blades is greater than the helix angle of the middle layer blades.

7. The fan blade according to any one of claims 1 to 6, wherein: the fan blade further comprises an outer layer fixing ring, the outer layer fixing ring is fixedly connected or integrally formed with the radially inner side end of each of the outer layer blades through its outer side surface, and the outer layer fixing ring is fixedly connected or integrally formed with the radially outer side end of each of the middle layer blades through its inner side surface; and / or the fan blade further comprises a middle layer fixing ring, the middle layer fixing ring is fixedly connected or integrally formed with the radially inner side end of each of the middle layer blades through its outer side surface, and the middle layer fixing ring is fixedly connected or integrally formed with the radially outer side end of each of the inner layer blades through its inner side surface; and / or the fan blade further comprises a central hub, the central hub is fixedly connected or integrally formed with the radially inner side end of each of the inner layer blades through its outer side surface; and the central hub is provided with a connecting hole for connecting an external driving shaft.

8. The fan blade according to claim 1, wherein: the fan blade is a fan blade of a fan.

9. A fan, characterized by The fan comprises the fan blade according to any one of claims 1 to 8.

10. The fan according to claim 9, wherein: the fan is a table fan, a floor fan, a ceiling fan, or a ceiling fan.

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