High-energy-efficiency fan blade and fan

Abstract

The embodiment of the utility model discloses a high-energy-efficiency fan blade which comprises a plurality of blades, the radius of the fan blade is r, six sections are cut from the inner diameter to the outer diameter of the blade at equal intervals, and each section is cut along an arc-shaped track with the axis of the fan blade as the circle center, the chord lengths of the six sections corresponding to the blade are 0.549 r (1 + / -10%), 0.614 r (1 + / -10%), 0.720 r (1 + / -10%), 0.839 r (1 + / -10%), 0.946 r (1 + / -10%) and 1.052 r (1 + / -10%) in sequence from inside to outside. The embodiment of the utility model further discloses a fan which comprises the high-energy-efficiency fan blade. According to the embodiment of the utility model, the parallel degree of the orthographic projections of the front end and the rear end of the blade is changed by changing the chord length, so that the front end of the blade can guide the airflow to flow after contacting with the airflow, the airflow can flow more smoothly, the fan blade has higher wind speed and air volume, and meanwhile, the contact noise of the fan blade and the airflow is also reduced; and under the condition of the same air speed and air volume, the energy consumption is smaller.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and in particular to a high-energy-efficiency fan blade and a fan. Background Art

[0002] Some fans on the market have blades with their front and rear projection lines nearly parallel, resulting in poor airflow diversion during rotation and a small amount of air flow.

[0003] Therefore, we provide a high energy efficiency fan blade and fan. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present utility model is that the air volume generated by the existing fan blades is small.

[0005] In order to solve the above problems, an embodiment of the present invention provides a high-efficiency fan blade, comprising a plurality of blades, wherein the radius of the fan blade is r, and six cross sections are equidistantly cut from the inner diameter to the outer diameter of the blade, and each cross section is cut along an arc trajectory with the axis of the fan blade as the center of the circle. The chord lengths of the blades corresponding to the six cross sections are 0.549r (1±10%), 0.614r (1±10%), 0.720r (1±10%), 0.839r (1±10%), 0.946r (1±10%), and 1.052r (1±10%) from the inside to the outside.

[0006] Optionally, the installation angles corresponding to the six sections are 40.7°, 39.3°, 36.9°, 34.7°, 32.5°, and 30.5° from inside to outside.

[0007] Optionally, the tolerance range of the installation angle of each cross section is between -15° and 10°.

[0008] Optionally, the thickness of the blade gradually decreases in an outward direction along the axis of the fan blade.

[0009] Optionally, the high-energy-efficiency fan blade is a 6-inch fan blade structure.

[0010] Optionally, the diameters corresponding to the six cross sections with the fan blade axis as the center are 60mm, 75mm, 90mm, 105mm, 120mm, and 135mm from the inside to the outside.

[0011] Optionally, the high-energy-efficiency fan blade further includes a hub, and the blade is connected to the hub.

[0012] Optionally, the blades are integrally connected to the hub.

[0013] Optionally, the number of the blades is 3-6.

[0014] The utility model also provides a fan, comprising the above-mentioned high-energy-efficiency fan blades.

[0015] Compared with the prior art, the technical effects achieved by the embodiments of the present invention include:

[0016] The multiple blades of the embodiment of the present invention are designed with chord lengths of 0.549r (1±10%), 0.614r (1±10%), 0.720r (1±10%), 0.839r (1±10%), 0.946r (1±10%), and 1.052r (1±10%) on six equidistant sections from inside to outside. By changing the chord length, the parallelism of the positive projections of the front and rear ends of the blades is changed, so that the front end of the blades can guide the airflow after contacting the airflow, making the airflow flow smoother, and making the fan blades have a higher wind speed and air volume. At the same time, the contact noise between the fan blades and the airflow is also reduced, and under the conditions of the same wind speed and air volume, the fan has lower energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 This is a structural diagram of the utility model.

[0021] Figure 2 It is a structural schematic diagram of the first cross section.

[0022] Figure 3 It is a structural schematic diagram of the second cross section.

[0023] Figure 4 It is a structural schematic diagram of the third section.

[0024] Figure 5 It is a structural schematic diagram of the fourth section.

[0025] Figure 6 It is a structural schematic diagram of the fifth section.

[0026] Figure 7 It is a structural schematic diagram of the sixth section.

[0027] Reference numerals

[0028] 1. Hub; 2. Blade; 3. First section; 4. Second section; 5. Third section; 6. Fourth section; 7. Fifth section; 8. Sixth section. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Similar component numbers in the drawings represent similar components. Obviously, the embodiments described below are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0030] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0031] It should also be understood that the terms used in this specification of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the specification of the embodiments of the present invention and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0032] See also Figure 1-7 The utility model provides a high-efficiency fan blade, including a hub 1 and a plurality of blades 2. The plurality of blades 2 are evenly distributed on the circumference of the hub 1. The blades 2 and the hub 1 are connected in an integrally formed manner. In this way, they have a strong structural connection, are not easily damaged, and are beneficial to maintenance costs.

[0033] Please continue reading Figure 1The radius of the high-efficiency fan blade of the present invention is r. Six cross-sections are taken equidistantly from the inner diameter to the outer diameter of the blade 2. Each cross-section is cut along an arc trajectory with the axis of the high-efficiency fan blade as the center. The chord lengths of the six cross-sections corresponding to the blade 2 are 0.549r (1±10%), 0.614r (1±10%), 0.720r (1±10%), 0.839r (1±10%), 0.946r (1±10%), and 1.052r (1±10%) from the inside to the outside, and the corresponding installation angles of the six cross-sections are 40.7°, 39.3°, 36.9°, 34.7°, 32.5°, and 30.5° from the inside to the outside. With this chord length design and the corresponding installation angle design, the high-efficiency fan blade of the present invention has the advantages of high wind speed, large air volume, and low noise when rotating and delivering air.

[0034] Specifically, the tolerance range of the installation angle of each section is between -15° and 10°, that is, from the inside to the outside, the installation angle corresponding to the first section 3 is between 25.7-50.7°, the installation angle corresponding to the second section 4 is between 24.3-49.3°, the installation angle corresponding to the third section 5 is between 21.9-46.9°, the installation angle corresponding to the fourth section 6 is between 19.7-44.7°, the installation angle corresponding to the fifth section 7 is between 18.5-42.5°, and the installation angle corresponding to the sixth section 8 is between 15.5-40.5°. Within this range, the high-efficiency fan blade rotation wind speed and air volume are better.

[0035] Furthermore, the thickness of the blade 2 gradually decreases in the direction outward from the fan blade axis. By designing that the thickness of the blade 2 gradually becomes thinner from the center to the outside, the impact and obstruction of the high-speed fan peripheral part on the airflow is reduced, and the fan blade noise is reduced.

[0036] Please continue reading Figure 1 In the present invention, the number of blades 2 is set to 5, which is a moderate number and has the advantage of better air output, including but not limited to this. It can also be set to 3, 4, 6 or more, and can be designed according to actual needs.

[0037] Please continue reading Figure 1The high-efficiency fan blade of the present invention is a 6-inch fan blade structure, that is, after conversion, the radius is 76.2mm, and it can also be a fan blade structure of other sizes. Substituting the above formula between chord length and radius r, the chord lengths of the six cross sections corresponding to the blade 2 are 41.8 (1±10%) mm, 46.8 (1±10%) mm, 54.8 (1±10%) mm, 63.9 (1±10%) mm, 72.1 (1±10%) mm, and 80.2 (1±10%) mm from the inside to the outside, and specifically 41.8 mm, 46.8 mm, 54.8 mm, 63.9 mm, 72.1 mm, and 80.2 mm in the present invention.

[0038] Please continue reading Figure 1 In the utility model, the diameters of the six cross sections corresponding to the fan blade axis as the center are 60mm, 75mm, 90mm, 105mm, 120mm, and 135mm from the inside to the outside.

[0039] The present invention also provides a fan (not shown), which includes the above-mentioned high-efficiency fan blades.

[0040] Compared with the prior art, the technical effects achieved by the embodiments of the present invention include:

[0041] The multiple blades of the embodiment of the present invention are designed with chord lengths of 0.549r (1±10%), 0.614r (1±10%), 0.720r (1±10%), 0.839r (1±10%), 0.946r (1±10%), and 1.052r (1±10%) on six equidistant sections from inside to outside. By changing the chord length, the parallelism of the positive projections of the front and rear ends of the blades is changed, so that the front end of the blades can guide the airflow after contacting the airflow, making the airflow flow smoother, and making the fan blades have a higher wind speed and air volume. At the same time, the contact noise between the fan blades and the airflow is also reduced, and under the conditions of the same wind speed and air volume, the fan has lower energy consumption.

[0042] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0045] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0047] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 invention. In this specification, the schematic expressions 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 the different embodiments or examples described in this specification.

[0048] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, as long as these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

[0049] The above description is a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A high energy efficiency fan blade, characterized by: It comprises a plurality of blades, the radius of the blade is r, six cross sections are equidistantly cut from the inner diameter to the outer diameter of the blade, each cross section is cut along an arc trajectory with the axis of the blade as the center of the circle, and the chord lengths of the blades corresponding to the six cross sections are 0.549r (1±10%), 0.614r (1±10%), 0.720r (1±10%), 0.839r (1±10%), 0.946r (1±10%), and 1.052r (1±10%) from the inside to the outside.

2. The high-efficiency fan blade according to claim 1, characterized in that: The installation angles corresponding to the six sections are 40.7°, 39.3°, 36.9°, 34.7°, 32.5°, and 30.5° from inside to outside.

3. The high-efficiency fan blade according to claim 2, characterized in that: The tolerance range of the installation angle of each cross section is between -15° and 10°.

4. The high-efficiency fan blade according to claim 1, characterized in that: The thickness of the blade gradually decreases in the direction outward from the axis of the fan blade.

5. The high-efficiency fan blade according to claim 1, characterized in that: The high-energy-efficiency fan blades are 6-inch fan blade structures.

6. The high-efficiency fan blade according to claim 4, characterized in that: The diameters of the six cross sections corresponding to the fan blade axis as the center are 60mm, 75mm, 90mm, 105mm, 120mm and 135mm from the inside to the outside.

7. The high-efficiency fan blade according to claim 1, characterized in that: The high-energy-efficiency fan blade further includes a hub, and the blade is connected to the hub.

8. The high-efficiency fan blade according to claim 7, characterized in that: The blades are connected to the hub in an integrally formed manner.

9. The high-efficiency fan blade according to claim 1, characterized in that: The number of the blades is 3-6.

10. A fan, characterized in that: The invention comprises a high-efficiency fan blade as described in any one of claims 1 to 9.

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