Double-layer high-energy-efficiency fan blade and fan

Abstract

The double-layer high-energy-efficiency fan blade comprises a hub, an inner-layer blade, a connecting ring cylinder and an outer-layer blade, one end of the inner-layer blade is fixedly connected with the hub, the other end of the inner-layer blade is fixedly connected with the inner wall of the connecting ring cylinder, the outer-layer blade is fixedly connected with the outer wall of the connecting ring cylinder, and the inner-layer blade is divided into three sections from inside to outside at equal intervals; each section is cut out by an arc-shaped track with the axis of the double-layer high-energy-efficiency fan blade as the circle center, the chord lengths, corresponding to the blades, of the three sections are 0.236 r * 95%-0.236 r * 105%, 0.250 r * 95%-0.250 r * 105% and 0.262 r * 95%-0.262 r * 105% in sequence from inside to outside, and the corresponding installation angles are 40 degrees, 38 degrees and 34 degrees in sequence.

Description

TECHNICAL FIELD

[0001] The application relates to the fan technical field, in particular to a double-layer high-energy-efficiency fan blade and a fan. BACKGROUND

[0002] The air on the inner side of the fan blade of the fan on the market cannot participate in air circulation well because the air is not acted on by the fan blade, so that the fan actually produces a small amount of wind, and cannot provide a better blowing and heat dissipation experience for the user.

[0003] Therefore, the prior art has defects and needs to be improved. CONTENT OF THE UTILITY MODEL

[0004] The application provides a double-layer high-energy-efficiency fan blade and a fan to solve the problem that the air on the inner side of the fan blade cannot participate in air circulation well because the air is not acted on by the fan blade, so that the fan actually produces a small amount of wind, and cannot provide a better blowing and heat dissipation experience for the user.

[0005] In a first aspect, the application provides a double-layer high-energy-efficiency fan blade, which comprises a hub, an inner layer blade, a connecting ring cylinder and an outer layer blade, one end of the inner layer blade is fixedly connected with the hub, the other end is fixedly connected with the inner wall of the connecting ring cylinder, the outer layer blade is fixedly connected with the outer wall of the connecting ring cylinder, three cross sections are taken at equal intervals from the inside to the outside of the inner layer blade, each of the cross sections is taken along an arc track with the double-layer high-energy-efficiency fan shaft as the center, and the chord lengths of the three cross sections corresponding to the blades are 0.236r*95%-0.236r*105%, 0.250r*95%-0.250r*105% and 0.262r*95%-0.262r*105% from the inside to the outside, and the corresponding installation angles are 40°, 38° and 34°.

[0006] Optionally, the tolerance range of the installation angle of each of the cross sections is between-10° and 10°.

[0007] Optionally, the number of the inner layer blades is the same as that of the outer layer blades, and the inner layer blades and the outer layer blades are arranged staggeredly.

[0008] Optionally, the outer layer blade is a sickle-shaped blade structure.

[0009] Optionally, the bending degree of the air cutting edge of the outer layer blade towards the air outlet direction gradually increases from the inside to the outside compared with the rotation plane.

[0010] Optionally, the double-layer high-energy-efficiency fan blade is a 14-inch fan blade structure.

[0011] Optionally, the diameters of the three cross sections corresponding to the double-layer high-energy-efficiency fan shaft as the center are 95 mm, 110 mm and 125 mm from the inside to the outside.

[0012] Optionally, the hub, the inner layer blade, the connecting ring cylinder and the outer layer blade are integrally injection molded.

[0013] Optionally, a connecting hole is formed in the middle of the hub.

[0014] In the second aspect, the application provides a fan, comprising the high energy efficiency fan blade.

[0015] Compared with the prior art, the above technical solution provided by the embodiments of the application has the following advantages:

[0016] The embodiments of the application increase the amount of air participating in flow by arranging the inner layer blade on the inner side of the original fan blade structure, so that the air on the inner side is acted on by the inner layer blade and guided to the action range of the outer layer blade, thereby increasing the air volume. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application together with the specification.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.

[0019] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.

[0020] Figure 1 A perspective view of a double-layer high energy efficiency fan blade provided by the embodiments of the application.

[0021] Figure 2 A front view of a double-layer high energy efficiency fan blade provided by the embodiments of the application.

[0022] Figure 3 A side view of a double-layer high energy efficiency fan blade provided by the embodiments of the application.

[0023] Figure 4 A structure schematic view of a first cross section.

[0024] Figure 5 A structure schematic view of a second cross section.

[0025] Figure 6 A structure schematic view of a third cross section.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1. Hub; 2. Inner vane; 3. Connecting ring; 4. Outer vane; 5. Connecting hole; 6. First cross section; 7. Second cross section; 8. Third cross section. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings for clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0029] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the elements and settings of particular examples in the following description will be described with reference to specific arrangements. It will be clear, however, that this is merely an example and is not intended to limit the present application. Furthermore, the present application can be implemented in a wide variety of environments and contexts. Consequently, specific

[0030] For ease of description, spatial relative terms can be used in the description to describe the relative position relationship or movement of one element or feature with respect to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "over", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "over" the other element or feature. Therefore, the example term "below" can include both upward and downward positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the description are interpreted accordingly.

[0031] In order to solve the technical problems in the prior art, the application provides a double-layer high-energy-efficiency fan blade and a fan, which can realize that, by being additionally provided with an inner layer blade on the original fan blade structure, the air on the inner side can be acted on by the inner layer blade, the airflow on the inner side is guided to the action range of the outer layer blade, the amount of air participating in the flow is increased, and the air volume is increased.

[0032] Figure 1 A double-layer high-energy-efficiency fan blade provided by the application has a whole radius of r, and comprises a hub 1, an inner layer blade 2, a connecting ring cylinder 3 and an outer layer blade 4. One end of the inner layer blade 2 is fixedly connected with the hub 1, and the other end is fixedly connected with the inner wall of the connecting ring cylinder 3. The outer layer blade 4 is fixedly connected with the outer wall of the connecting ring cylinder 3. A connecting hole 5 is formed in the middle position of the hub 1, and is used to be connected with the output end of a rotating motor to realize that the double-layer high-energy-efficiency fan blade is driven to rotate and blow air. The connecting ring cylinder 3 is used to connect the inner layer blade 2 and the outer layer blade 4 without affecting the flow of air. When the double-layer high-energy-efficiency fan blade works, the inner layer blade 2 rotates, guides the air on the inner side near the hub 1 to the outer ring position, that is, the position of the outer layer blade 4, and the outer layer blade 4 blows out the guided air on the inner side together with the air on the outer side, thereby increasing the amount of air participating in the flow and the air volume.

[0033] Preferably, the outer layer blade 4 is a sickle-shaped blade structure, has the advantages of a blade shape with a wider middle part and narrower two end parts, can reduce the resistance, and can also ensure a certain wind cutting area, thereby being beneficial to ensuring the air volume. The hub 1, the inner layer blade 2, the connecting ring cylinder 3 and the outer layer blade 4 are integrally injection molded, have strong structural strength, and are not easy to be damaged.

[0034] Please refer to Figures 2-6 Three cross sections are taken on the inner layer blade 2 from the inside to the outside at equal intervals, each cross section is taken along an arc track with the axis of the double-layer high-energy-efficiency fan as the center, the chord lengths of the three cross sections from the inside to the outside are 0.236r*95%-0.236r*105%, 0.250r*95%-0.250r*105% and 0.262r*95%-0.262r*105% respectively, and the corresponding installation angles are 40°, 38° and 34° respectively. With the decrease of the installation angle, the wind cutting area of the inner layer blade 2 gradually decreases, so that the inner layer blade 2 can effectively guide the air on the inner side to the outer side, so that the air on the inner side is in contact with the airflow generated by the outer layer blade 4, and the overall air volume is improved. The tolerance range of the installation angle of each cross section is between -10° and 10°, that is, from the inside to the outside, the installation angle of the first cross section 6 is in the range of 30-50°, the installation angle of the second cross section 7 is in the range of 28-48°, and the installation angle of the third cross section 8 is in the range of 24-44°. Within this range, the rotating wind speed and the air volume are better.

[0035] Please continue to refer to Figure 2 The double-layer high-energy-efficiency fan blade is a 14-inch fan blade structure, and after conversion, the radius r thereof is 177.8 mm. The chord length corresponding to the three cross sections is 42 mm (1±5%), 44.5 mm (1±5%), and 46.6 mm (1±5%) from inside to outside, and in the utility model, the chord length is specifically 42 mm, 44.5 mm, and 46.6 mm. It can be understood that the double-layer high-energy-efficiency fan blade can also be a fan blade structure of other sizes, and the specific size can be set according to actual size requirements. In the utility model, the diameter corresponding to the three cross sections with the double-layer high-energy-efficiency fan blade shaft as the center is 95 mm, 110 mm, and 125 mm from inside to outside.

[0036] Preferably, in the utility model, the bending degree of the air cutting edge of the outer blade 4 towards the air outlet direction gradually increases from inside to outside compared with the rotation plane. When the outer blade 4 cuts air, it can effectively gather the airflow towards the middle and converge the airflow conducted from the inner blade, so that the overall airflow has the advantage of high wind speed. Preferably, the number of the inner blade 2 and the outer blade 4 is the same, and the inner blade 2 and the outer blade 4 are staggered, which is beneficial to realize the synchronous air cutting effect of the inner blade 2 and the outer blade 4. Further preferably, the number of the inner blade 2 and the outer blade 4 is 7, including but not limited to this, which can also be set to 5, 6, 8, 9 or other.

[0037] The utility model also provides a fan (not shown in the figure), which comprises the double-layer high-energy-efficiency fan blade, the double-layer high-energy-efficiency fan blade is connected with the output end of the rotating motor of the fan through the connecting hole 5 in the middle position of the hub 1, and then the air outlet function is realized.

[0038] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0040] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of the technical features indicated. Thus, the features defined with "first", "second", etc. can include one or more of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0041] In the present application, unless otherwise explicitly and specifically defined, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the present application, unless otherwise explicitly and specifically defined, the first feature "on" or "under" the second feature can include the first and second features directly contacting, or the first and second features not directly contacting but contacting through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0043] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application.

[0044] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, these modifications and variations of the present application are intended to be included in the scope of the claims of the present application and their equivalents. The present application is also intended to include these modifications and variations.

[0045] The above is merely specific embodiments of the present application, and the protection scope of the present application is not limited thereto, and any modification or replacement within the technical scope disclosed by the present application can be easily thought by those skilled in the art, and these modifications or replacements shall be encompassed in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A double layer high energy efficiency fan blade with an overall radius of r, characterized in that: The double-layer high-energy-efficiency fan blade comprises a hub, inner-layer blades, a connecting ring cylinder and outer-layer blades, one end of the inner-layer blades is fixedly connected with the hub, the other end is fixedly connected with the inner wall of the connecting ring cylinder, the outer-layer blades are fixedly connected with the outer wall of the connecting ring cylinder, three cross sections are taken at equal intervals from the inside to the outside of the inner-layer blades, each of the cross sections is taken along an arc-shaped track with the hub of the double-layer high-energy-efficiency fan blade as the center, the chord length of the three cross sections corresponding to the blades is 0.236r*95%-0.236r*105%, 0.250r*95%-0.250r*105% and 0.262r*95%-0.262r*105% from the inside to the outside, and the corresponding installation angles are 40°, 38° and 34°.

2. The double layer high energy efficiency fan blade of claim 1, wherein: The tolerance range of the installation angle of each cross section is between -10° and 10°.

3. The double layer high energy efficiency fan blade of claim 1, wherein: The number of the inner-layer blades and the outer-layer blades is the same, and the inner-layer blades and the outer-layer blades are arranged staggeredly.

4. The bi-level high-efficiency fan blade of claim 1, wherein: The outer-layer blades are in the shape of sickle blades.

5. The bi-level high-efficiency fan blade of claim 1, wherein: The bending degree of the air cutting edge of the outer-layer blades towards the air outlet direction gradually increases from the inside to the outside compared with the rotating plane.

6. The bi-level high-efficiency fan blade of claim 1, wherein: The double-layer high-energy-efficiency fan blade is in the structure of a 14-inch fan blade.

7. The bi-level high-efficiency fan blade of claim 1, wherein: The diameters of the three cross sections corresponding to the hub of the double-layer high-energy-efficiency fan blade are 95mm, 110mm and 125mm from the inside to the outside.

8. The bi-level high-efficiency fan blade of claim 1, wherein: The hub, the inner-layer blades, the connecting ring cylinder and the outer-layer blades are integrally injection molded.

9. The bi-level high-efficiency fan blade of claim 1, wherein: A connecting hole is arranged in the middle of the hub.

10. A fan characterized by: The double-layer high-energy-efficiency fan blade is used in the double-layer high-energy-efficiency fan.

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