A multi-layer fan blade

Abstract

The present invention relates to a multi-layer fan blade, including a central block. The technical key point is that an inner ring frame is provided on the central block, an outer ring frame is provided outside the inner ring frame, a plurality of first blades surrounding a circle are provided inside the inner ring frame, a plurality of second blades surrounding a circle are provided between the inner ring frame and the outer ring frame, and a plurality of third blades surrounding a circle are provided outside the outer ring frame. The structure of the present invention is simple and it is convenient to adjust to a reasonable air volume.

Description

Technical Field

[0001] The present invention relates to a fan blade.

Background Art

[0002] Generally, the fan blades on existing fans are all in one orientation, that is, there is only one circle of blades, and the angles of the blades are fixed, forming a columnar wind, that is, there is wind from the middle to the outside of the fan blade, and the wind on the outside is smaller, resulting in a larger air volume in the middle position of the fan and a smaller one on the periphery; if the fan is in the living room, only a few people near the middle of the fan can be blown by the wind, while there is only a gentle breeze at the position where there are more people outside; if the fan is installed in the dining room, the air volume at the position where the dishes are placed on the dining table is larger, while the people on the periphery of the dining table feel that the air volume is small, so the dishes cool down quickly, and people don't feel cool.

Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a multi-layer fan blade with a simple structure and convenient for reasonable distribution of internal and external air volumes.

[0004] To solve the above problems, the present invention adopts the following technical solutions:

[0005] A multi-layer fan blade includes a central block, and is characterized in that: an inner ring frame is provided on the central block, an outer ring frame is provided outside the inner ring frame, a plurality of first blades surrounding a circle are provided inside the inner ring frame, a plurality of second blades surrounding a circle are provided between the inner ring frame and the outer ring frame, and a plurality of third blades surrounding a circle are provided outside the outer ring frame.

[0006] For a multi-layer fan blade as described above, it is characterized in that: the included angle α between the connection line of the transverse ends of the first blade and the axial direction of the fan blade is 55° to 65°, the included angle β between the connection line of the two ends of the transverse plane of the second blade and the axial direction of the fan blade is 62° to 72°, and the included angle γ between the connection line of the transverse ends of the third blade and the axial direction of the fan blade is 48° to 58°.

[0007] For a multi-layer fan blade as described above, it is characterized in that: the included angle α of the first blade is 65°.

[0008] For a multi-layer fan blade as described above, it is characterized in that: the included angle β of the second blade is 67°.

[0009] For a multi-layer fan blade as described above, it is characterized in that: the included angle γ of the third blade is 53°.

[0010] For a multi-layer fan blade as described above, it is characterized in that: a notch is provided on the side edge of the third blade close to the air outlet side of the fan blade.

[0011] A multi-layer fan blade as described above, characterized in that: the inner ring frame and the outer ring frame are circular rings, one end of the first blade is on the outer wall of the central block and the other end is on the inner wall of the inner ring frame, and one end of the second blade is on the outer wall of the inner ring frame and the other end is on the inner wall of the outer ring frame.

[0012] A multi-layer fan blade as described above, characterized in that: the number of the third blades is greater than the number of the second blades, and the number of the second blades is greater than the number of the first blades.

[0013] A multi-layer fan blade as described above, characterized in that: there are thirteen third blades, nine second blades, and six first blades.

[0014] The beneficial effects of the present invention are as follows: three layers of fan blades are arranged in sequence from the inside to the outside, so that the angles or numbers of the fan blades can be reasonably set according to different needs, thereby reasonably adjusting the air volume, enabling the wind energy of each layer of fan blades to be superimposed on the outside, and enhancing the outside wind; the angle of each layer of fan blades is set within a certain angle range, and the airflow generated when the blades rotate is superimposed towards the periphery, and at the same time, an airflow difference is formed above the fan blades, further reducing the running wind noise, achieving no wind in the exact middle and strong wind outside, thus forming a wind ring. Compared with the wind column formed by traditional fan blades, with the same blade length, the range of the wind ring wind is larger and the outside air volume is larger, making the air volume distribution of the fan blades reasonable; the number of fan blades increases sequentially from the inside to the outside, so that the air volume on the outside is larger; notches are provided on the third blades, reducing wind resistance and wind noise.

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view of the present invention;

[0016] Figure 2 is Figure 1 the A-A cross-sectional view of

[0017] Figure 3 is Figure 1 the B-B cross-sectional view of

[0018] Figure 4 is Figure 1 the C-C cross-sectional view of

[0019] Figure 5 is the three-dimensional view of the present invention;

[0020] Figure 6 is the schematic diagram of the air outlet of the present invention;

[0021] Figure 7 is the schematic diagram of the formation of the wind ring of the present invention;

[0022] Figure 8 is the schematic diagram of the wind column formed by the existing design.

DETAILED DESCRIPTION OF THE INVENTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0024] As Figures 1 to 8 shown, a multi-layer fan blade includes a central block 1. An inner ring frame 2 is provided on the central block 1, and an outer ring frame 3 is provided outside the inner ring frame 2. The central block 1, the inner ring frame 2, and the outer ring frame 3 are concentrically arranged. A plurality of first blades 4 that enclose a circle are provided inside the inner ring frame 2. A plurality of second blades 5 that enclose a circle are provided between the inner ring frame 2 and the outer ring frame 3. A plurality of third blades 6 that enclose a circle are provided outside the outer ring frame 3. The included angle α between the connection line of the transverse two ends of the first blade 4 and the axial direction of the fan blade is 60° to 70°. The best embodiment is that the included angle α of the first blade 4 is 65° ± 2°, and the preferred included angle α is 65°; the included angle β between the connection line of the two ends of the transverse plane of the second blade 5 and the axial direction of the fan blade is 62° to 72°. The best embodiment is that the included angle β of the second blade 5 is 67° ± 2°, and the preferred inclination angle β is 67°; the included angle γ between the connection line of the transverse two ends of the third blade 6 and the axial direction of the fan blade is 48° to 58°. The best embodiment is that the included angle γ is 53° ± 2°, and the preferred included angle γ is 53°. The end of the blade connected to the outer ring frame 3 is the root, and the end far from the outer ring frame 3 is the head. The connection line between the root and the head is the longitudinal direction, and the direction perpendicular to the longitudinal direction is the transverse direction, that is, the two ends in the width direction. Through such a blade angle design, the air outlet angle of the first blade 4 is approximately 60° ± 5°, the air outlet angle of the second blade 5 is approximately 45° ± 5°, and the air outlet angle of the third blade 6 is approximately 30° ± 5°. Therefore, there is no wind in the middle position of the fan blade, and the outer winds are superimposed to form an annular wind, as Figure 6 shown, Figure 6 In, the innermost is the air outlet schematic of the first blade 4, the middle is the air outlet schematic of the second blade 5, and the outermost is the air outlet schematic of the third blade 6. The formed wind ring is as Figure 7 shown. There is no wind in the middle of the ring. Compared with the existing wind column effect (as Figure 8 shown), with the same air outlet area, the diameter of the wind ring formed by the present invention is large, and the air volume on the outside is large. A plurality of first blades 4, a plurality of second blades 5, and a plurality of third blades 6 respectively enclose a circle. The first blades 4 enclose the inner circle, the second blades 5 enclose the middle circle, and the third blades 6 enclose the outer circle. The inner circle is within the middle circle, and the middle circle is within the outer circle. The first blades 4, the second blades 5, and the third blades 6 are bent at a certain arc, so that the blades present a vortex shape after enclosing a circle. A notch 61 is provided on the side edge of the third blade 6 close to the air outlet side of the fan blade. The notch 61 is close to the root of the third blade 6. The notch 61 is concave inward towards the middle of the third blade 6. The notch 61 can be concave inward in an arc shape. This side is the air outlet side. That is to say, if the fan is a ceiling-mounted one, then the notch 6 is on the lower side edge of the third blade 6 ( Figure 5In the case of a table fan facing a person, the notch 6 is on the side close to the person, so that the air resistance can be effectively reduced when the air blows, thereby reducing the noise.

[0025] The inner ring frame 2 and the outer ring frame 3 are circular rings. One end of the first blade 4 is on the outer wall of the central block 1 and the other end is on the inner wall of the inner ring frame 2. One end of the second blade 5 is on the outer wall of the inner ring frame 2 and the other end is on the inner wall of the outer ring frame 3. The central block 1 and the inner ring frame 2 are connected by the first blade 4, and the inner ring frame 2 and the outer ring frame 3 are connected by the second blade 5. The number of the third blades 6 is greater than the number of the second blades 5, and the number of the second blades 5 is greater than the number of the first blades 4. There are thirteen third blades 6, nine second blades 5, and six first blades 4.

[0026] The above content is a further detailed description of the present invention in combination with specific preferred technical solutions. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the invention.

Claims

1. A multi-layer fan blade, comprising a central block (1), characterized in that: An inner ring frame (2) is provided on the central block (1). An outer ring frame (3) is provided outside the inner ring frame (2). A plurality of first blades (4) surrounding a circle are provided inside the inner ring frame (2). A plurality of second blades (5) surrounding a circle are provided between the inner ring frame (2) and the outer ring frame (3). A plurality of third blades (6) surrounding a circle are provided outside the outer ring frame (3). The included angle α of the first blade (4) is 65°. The included angle β of the second blade (5) is 67°. The included angle γ of the third blade (6) is 53°. When the blades rotate, the generated airflows are superimposed towards the periphery, and at the same time, an airflow difference is formed above the fan blades, achieving no wind in the middle and strong wind outside, thus forming a wind ring.

2. The multi-layer fan blade according to claim 1, wherein: A notch (61) is provided on the side edge of the third blade (6) close to the air outlet side of the fan blade.

3. A multi-layer fan blade according to claim 1, characterized in that: The inner ring frame (2) and the outer ring frame (3) are circular rings. One end of the first blade (4) is on the outer wall of the central block (1) and the other end is on the inner wall of the inner ring frame (2). One end of the second blade (5) is on the outer wall of the inner ring frame (2) and the other end is on the inner wall of the outer ring frame (3).

4. A multi-layer fan blade according to claim 1, wherein: The number of the third blades (6) is greater than the number of the second blades (5), and the number of the second blades (5) is greater than the number of the first blades (4).

5. The multi-layer fan blade according to claim 4, characterized in that: The number of the third blades (6) is thirteen, the number of the second blades (5) is nine, and the number of the first blades (4) is six.

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