Double laminated blade axial flow fan

Abstract

The present invention discloses a double - laminated blade axial - flow fan, which comprises a fan assembly. The fan assembly includes a middle connecting piece and double - laminated blades. The double - laminated blades include a first connecting blade, a second connecting blade, and an arc - shaped connecting piece. The arc - shaped connecting piece includes a first connecting section, a middle connecting section, and a second connecting section. The arc - shaped connecting piece is in an N or S shape. The first connecting blade is provided with a first arc - shaped tail end, and the second connecting blade is provided with a second arc - shaped tail end. By adopting the design of double - laminated blades, the balance and stability of the fan blades during operation, as well as the strong wind pressure, are achieved. The unbalance amount of the fan blades is greatly reduced. The N or S - shaped arc - shaped connecting piece is connected to the tails of the first connecting blade and the second connecting blade, reducing the wind shear resistance, thereby reducing the vibration generated by the fan and lowering the overall noise during the operation of the fan. It can increase the wind force and wind pressure while reducing the noise, solving the problem that it is impossible to reduce the noise while increasing the air volume and wind pressure.

Description

Technical Field

[0001] The present invention relates to the field of radiators, and particularly to a double laminated blade axial flow fan. Background Art

[0002] Currently, in the electronics industry, the heat generated by electronic components during operation is immeasurable, especially for electronic chips, which control the operation of the entire electronic system; the heat energy can cause serious damage to the components themselves, and also accelerate the aging of surrounding devices, reducing their service life. Radiators can reduce the temperature of components, and the fan, as a commonly used active heat dissipation component in the heat dissipation system, is essential in the radiator; it plays a crucial role in the entire heat dissipation process; therefore, the performance of the fan directly affects the heat dissipation performance of the radiator.

[0003] However, the existing radiators have the following defects:

[0004] 1. In the traditional radiator's cooling fan, the fan blade, as the main component of the fan, plays a very important role. The air flow in and out directions are parallel to the axis of the fan blade; currently, the fan blade structure of the axial flow fan is mostly sickle-shaped, and it is difficult for ordinary thin fans to overcome the large diameter and multi-blade structure.

[0005] 2. In the design of the fan blade shape, in order to achieve a large air volume and air pressure, enhancing the balance of the fan blade has become a key design problem; generally, large blades and fewer blade numbers are used. Although the air volume advantage has been improved a lot in this way, it is difficult to increase the air pressure under the same noise; therefore, how to increase the number of fan blades and ensure that the blades do not deform or expand during operation has become the main problem in the fan blade design. The existing fans in the prior art cannot reduce the noise while increasing the air volume and air pressure. Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a double laminated blade axial flow fan, which can solve the problem of being unable to reduce the noise while increasing the air volume and air pressure.

[0007] One of the purposes of the present invention is achieved by adopting the following technical solutions:

[0008] A double - laminated blade axial - flow fan includes a fan assembly. The fan assembly includes a middle connector and double - laminated blades fixedly connected to the middle connector. The double - laminated blades include a first connecting blade, a second connecting blade, and an arc - shaped connecting piece. The arc - shaped connecting piece includes a first connecting section, a middle connecting section, and a second connecting section. The two ends of the middle connecting section are respectively connected to the first connecting section and the second connecting section. The first connecting section is fixedly connected to the tail of the first connecting blade, and the second connecting section is fixedly connected to the tail of the second connecting blade. The arc - shaped connecting piece is in the shape of N or S. The first connecting blade is provided with a first arc - shaped tail end, and the second connecting blade is provided with a second arc - shaped tail end. The first connecting section is flush with the first arc - shaped tail end, and the second connecting section is flush with the second arc - shaped tail end.

[0009] Further, the number of the double - laminated blades is 2N + 1, where N is a positive integer.

[0010] Further, a double - blade gap is formed between the first connecting blade and the second connecting blade.

[0011] Further, upper and lower concave positions are respectively arranged at the upper and lower ends of the arc - shaped connecting piece.

[0012] Further, the vertical projection of the second arc - shaped tail end along the maximum outer diameter forms a first arc - shaped curve, and the vertical projection of the first connecting section along the maximum outer diameter forms a first connecting curve, and the first connecting curve coincides with the first arc - shaped curve.

[0013] Further, the vertical projection of the first arc - shaped tail end along the maximum outer diameter forms a second arc - shaped curve, and the vertical projection of the second connecting section along the maximum outer diameter forms a second connecting curve, and the second connecting curve coincides with the second arc - shaped curve.

[0014] Further, the middle connector is in a disc shape, and the double - laminated blades are arranged around the side of the middle connector.

[0015] Further, the thickness of the middle part of the first connecting blade is greater than the thickness of the side part.

[0016] Further, the thickness of the middle part of the second connecting blade is greater than the thickness of the side part.

[0017] Further, the double - laminated blade axial - flow fan further includes a bottom connector, and the bottom connector is connected to the middle connector.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The arc-shaped connecting piece includes a first connecting section, a middle connecting section, and a second connecting section. The two ends of the middle connecting section are respectively connected to the first connecting section and the second connecting section. The first connecting section is fixedly connected to the tail of the first connecting blade, and the second connecting section is fixedly connected to the tail of the second connecting blade. The arc-shaped connecting piece is in the shape of N or S. The first connecting blade is provided with a first arc-shaped tail end, and the second connecting blade is provided with a second arc-shaped tail end. The first connecting section is flush with the first arc-shaped tail end, and the second connecting section is flush with the second arc-shaped tail end. The design of using the first connecting blade, the second connecting blade, and the arc-shaped connecting piece to form a double-stack blade makes the balance and stability of the fan blade during operation, the strong wind pressure, greatly reduces the unbalance amount of the fan blade. The arc-shaped connecting piece in the shape of N or S is connected to the tails of the first connecting blade and the second connecting blade, reducing the wind shear resistance, thereby reducing the vibration generated by the fan and lowering the overall noise of the fan operation. It can improve the wind force and wind pressure while reducing the noise, solving the problem that it is impossible to reduce the noise while increasing the air volume and wind pressure.

[0020] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, details are described as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a perspective view of a preferred embodiment of the double-stack blade axial flow fan of the present invention;

[0022] Figure 2 is Figure 1 a perspective view of the double-stack blade axial flow fan shown;

[0023] Figure 3 is Figure 1 another perspective view of the double-stack blade axial flow fan shown;

[0024] Figure 4 is Figure 1 a perspective view of a double-stack blade in the double-stack blade axial flow fan shown;

[0025] Figure 5 is Figure 4 a perspective view of the double-stack blade shown;

[0026] Figure 6 is Figure 4 another perspective view of the double-stack blade shown;

[0027] Figure 7 is Figure 1 yet another perspective view of the double-stack blade axial flow fan shown;

[0028] Figure 8 is Figure 1 a partial perspective view of the double - laminated blade axial - flow fan shown;

[0029] Figure 9 is Figure 1 another partial perspective view of the double - laminated blade axial - flow fan shown.

[0030] In the figure: 10, the fan assembly; 11, the middle connecting piece; 12, the double - laminated blades; 121, the first connecting blade; 1211, the first arc - shaped tail end; 122, the second connecting blade; 1221, the second arc - shaped tail end; 123, the arc - shaped connecting piece; 1231, the first connecting section; 1232, the middle connecting section; 1233, the second connecting section; 1234, the upper - side concave position; 1235, the lower - side concave position; 20, the bottom connecting piece. Detailed implementation manners

[0031] Next, in combination with the drawings and the detailed implementation manners, the present invention will be further described. It should be noted that, on the premise of no conflict, any combination can be formed between the following described embodiments or technical features.

[0032] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] Please refer to Figure 1-9, A double - laminated blade axial - flow fan, including a fan assembly 10. The fan assembly 10 includes a middle connector 11 and double - laminated blades 12 fixedly connected to the middle connector 11. The double - laminated blades 12 include a first connecting blade 121, a second connecting blade 122, and an arc - shaped connecting piece 123. The arc - shaped connecting piece 123 includes a first connecting section 1231, a middle connecting section 1232, and a second connecting section 1233. The two ends of the middle connecting section 1232 are respectively connected to the first connecting section 1231 and the second connecting section 1233. The first connecting section 1231 is fixedly connected to the tail of the first connecting blade 121, and the second connecting section 1233 is fixedly connected to the tail of the second connecting blade 122; The arc - shaped connecting piece 123 is in the shape of N or S. The first connecting blade 121 is provided with a first arc - shaped tail end 1211, and the second connecting blade 122 is provided with a second arc - shaped tail end 1221. The first connecting section 1231 is flush with the first arc - shaped tail end 1211, and the second connecting section 1233 is flush with the second arc - shaped tail end 1221. The design of using the cooperation of the first connecting blade 121, the second connecting blade 122, and the arc - shaped connecting piece 123 to form double - laminated blades enables the balance and stability of the fan blades during operation, strong wind pressure, greatly reduces the unbalance amount of the fan blades. The arc - shaped connecting piece 123 in the shape of N or S is connected to the tails of the first connecting blade 121 and the second connecting blade 122, reducing the wind - cutting resistance, thereby reducing the vibration generated by the fan and lowering the overall noise of the fan operation. It can improve the wind force and wind pressure while reducing the noise, solving the problem of being unable to reduce the noise while increasing the air volume and wind pressure.

[0035] Preferably, the number of the double - laminated blades 12 is 2N + 1, where N is a positive integer. Such as 3, 5, 7, 11 groups of laminated blade groups, etc.; The total number of blades is an even number of blades. For example, the total number of blades corresponding to 3, 5, 7, 11 groups of laminated blade groups is 6, 10, 14, 22 blades.

[0036] Preferably, a double - blade gap is formed between the first connecting blade 121 and the second connecting blade 122. Upper - side recessed positions 1234 and lower - side recessed positions 1235 are respectively arranged at the upper and lower ends of the arc - shaped connecting piece 123.

[0037] Preferably, the vertical projection of the second arc - shaped tail end 1221 along the maximum outer diameter forms a first arc - shaped curve, and the vertical projection of the first connecting section 1231 along the maximum outer diameter forms a first connecting curve, and the first connecting curve coincides with the first arc - shaped curve. The vertical projection of the first arc - shaped tail end 1211 along the maximum outer diameter forms a second arc - shaped curve, and the vertical projection of the second connecting section 1233 along the maximum outer diameter forms a second connecting curve, and the second connecting curve coincides with the second arc - shaped curve.

[0038] Preferably, the middle connecting member 11 is disc-shaped, and the double-stack blades 12 are arranged around the side of the middle connecting member 11. The middle thickness of the first connecting blade 121 is greater than the thickness of the side edge. The middle thickness of the second connecting blade 122 is greater than the thickness of the side edge. The double-stack blade axial flow fan further includes a bottom connecting member 20, and the bottom connecting member 20 is connected to the middle connecting member 11. The whole device has a compact structure, novel structure, ingenious design, strong applicability and is convenient for popularization.

[0039] The purpose of adopting the double-blade stack design is as follows: The stack design ensures the balance and stability during the operation of the fan blades, strong wind pressure, and greatly reduces the unbalance of the fan blades; The "N" or "S" semi-circular arc at the end side of the double-blade leaf reduces the wind shear resistance, thereby reducing the vibration generated by the fan and lowering the overall noise of the fan operation. As a result, the rotational speed of the fan is increased by 15% compared with that of the traditional fan blades under the same noise, and the wind speed and wind pressure performance are greatly improved. Experimental data shows that the wind speed is equivalent to an increase of 35% under the same noise, and the wind pressure is equivalent to an increase of 39% under the same noise. For the same radiator and the same heat source, the heat dissipation performance is greatly improved compared with the traditional fan blades under the same module noise.

[0040] The above embodiments are only the preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A double - laminated blade axial - flow fan, comprising a fan assembly, characterized in that: The fan assembly includes a middle connector and double - laminated blades fixedly connected to the middle connector. The double - laminated blades include a first connecting blade, a second connecting blade, and an arc - shaped connecting piece. The arc - shaped connecting piece includes a first connecting section, a middle connecting section, and a second connecting section. The two ends of the middle connecting section are respectively connected to the first connecting section and the second connecting section. The first connecting section is fixedly connected to the tail of the first connecting blade, and the second connecting section is fixedly connected to the tail of the second connecting blade; The arc - shaped connecting piece is in the shape of N or S. The first connecting blade is provided with a first arc - shaped tail end, and the second connecting blade is provided with a second arc - shaped tail end. The first connecting section is flush with the first arc - shaped tail end, and the second connecting section is flush with the second arc - shaped tail end; The upper and lower ends of the arc - shaped connecting piece are respectively provided with an upper - side recess and a lower - side recess; The vertical projection of the second arc - shaped tail end along the maximum outer diameter forms a first arc - shaped curve, and the vertical projection of the first connecting section along the maximum outer diameter forms a first connecting curve. The first connecting curve coincides with the first arc - shaped curve; The vertical projection of the first arc - shaped tail end along the maximum outer diameter forms a second arc - shaped curve, and the vertical projection of the second connecting section along the maximum outer diameter forms a second connecting curve. The second connecting curve coincides with the second arc - shaped curve.

2. The double - laminated blade axial - flow fan according to claim 1, characterized in that: The number of the double - laminated blades is 2N + 1, where N is a positive integer.

3. The double - laminated blade axial - flow fan according to claim 1, characterized in that: A double - blade gap is formed between the first connecting blade and the second connecting blade.

4. The double - laminated blade axial - flow fan according to claim 1, characterized in that: The middle connector is in a disc shape, and the double - laminated blades are arranged around the side of the middle connector.

5. The double - laminated blade axial - flow fan according to claim 1, characterized in that: The middle thickness of the first connecting blade is greater than the thickness of its side edges.

6. The double - laminated blade axial - flow fan according to claim 1, characterized in that: The middle thickness of the second connecting blade is greater than the thickness of its side edges.

7. The double - laminated blade axial - flow fan according to claim 1, characterized in that: The double - laminated blade axial - flow fan further includes a bottom connector, and the bottom connector is connected to the middle connector.

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