Cooling fan

Abstract

The utility model discloses a cooling fan which comprises a shell and a wind wheel, and the shell is provided with an installation cavity. The wind wheel is mounted in the mounting cavity; the wind wheel comprises a plurality of blades, a mounting base and two connecting ribs, the blades are arranged at intervals in the circumferential direction of the central axis of the mounting base, and one connecting rib is located at the top ends of the blades and sequentially connected to the outer side edges of the blades. The other connecting rib is located at the bottom ends of the multiple blades and is sequentially connected to the inner side edges of the multiple blades. And the mounting seat is connected with one of the connecting ribs. After the blades are connected, the effective area cannot be covered by the connecting ribs, so that the wind wheel can cover a larger area during rotation, more wind energy is captured, the wind power is larger, the influence of vortexes is reduced, and unnecessary vortexes and noise are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a heat dissipation fan. Background Art

[0002] In order to ensure the stability of the wind wheel and higher wind pressure output, the multiple blades of the existing fan are usually connected together by connecting parts (such as connecting ribs). However, the existing connecting parts are usually connected in the middle of the blades. Since the connecting parts usually have a certain width, when they are connected with multiple blades, they may partially cover the contact area of ​​the blades, resulting in a reduction in the effective area of ​​the blades, which means that the wind force that can be captured is also reduced accordingly. It may also interfere with the airflow around the blades, affect the aerodynamic performance of the blades, and even generate unnecessary vortices and noise. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art, the utility model provides a heat dissipation fan, wherein after the plurality of blades are connected, the effective area of ​​the blades is not reduced.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] A heat dissipation fan, comprising:

[0006] A housing having a mounting cavity;

[0007] A wind wheel, wherein the wind wheel is installed in the installation cavity; the wind wheel comprises a plurality of blades, a mounting seat and two connecting ribs, wherein the plurality of blades are circumferentially spaced along the central axis of the mounting seat, wherein one of the connecting ribs is located at the top of the plurality of blades and is sequentially connected to the outer edges of the plurality of blades, and the other connecting rib is located at the bottom of the plurality of blades and is sequentially connected to the inner edges of the plurality of blades; the mounting seat is connected to one of the connecting ribs.

[0008] Furthermore, the shell is provided with a wiring opening, and the wiring opening is communicated with the installation cavity. The shell is also provided with a limit baffle on its periphery, and the limit baffle is spaced apart from the periphery of the shell to form a wiring interval. The limit baffle is also provided with a limit groove, and the limit groove is communicated with the wiring interval.

[0009] Furthermore, the limit baffle includes a first plate segment, a second plate segment and a third plate segment, and the first plate segment, the second plate segment and the third plate segment are semi-enclosed to form the limit groove; the first plate segment is connected to the shell, and the second plate segment is connected to the top end of the first plate segment; the second plate segment is spaced from the periphery of the shell and forms the routing interval, and the third plate segment is vertically connected to an end of the second plate segment away from the first plate segment, and extends toward a routing direction.

[0010] Furthermore, the housing is provided with a wiring groove, one end of the wiring groove is communicated with the wiring port, and the other end of the wiring groove extends to the wiring interval and penetrates the wiring interval.

[0011] Furthermore, the inner diameter of the wiring opening is larger than the inner diameter of the wiring groove.

[0012] Furthermore, the plurality of blades are circumferentially spaced apart along the central axis of the mounting seat, and an air duct is formed between every two adjacent blades.

[0013] Furthermore, the plurality of blades are each provided with an arc guide surface, and the plurality of arc guide surfaces are used to guide the airflow into the air duct.

[0014] Furthermore, the connecting ribs and the mounting seat are spaced apart and connected via at least six reinforcing ribs, and the at least six reinforcing ribs are evenly spaced and distributed circumferentially along the central axis of the mounting seat.

[0015] Furthermore, a positioning column is provided in the shell, and a connecting shaft is provided in the mounting seat. The connecting shaft can be rotatably inserted into the positioning column so that the wind wheel is rotatably connected to the shell.

[0016] To sum up, the cooling fan provided by the utility model has the following technical effects: the top and bottom ends of its multiple blades are respectively connected by two connecting ribs. Since the connecting ribs are respectively connected to the outer edges and inner edges of the multiple blades, the effective area of ​​the multiple blades will not be covered by the connecting ribs after the connection, thereby ensuring that the effective wind sweeping area of ​​the blades is maximized after the blades are connected, thereby capturing more wind energy and greater wind force, thereby reducing the impact of eddy currents and avoiding the generation of unnecessary eddy currents and noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the wind wheel of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the utility model from another perspective;

[0020] Figure 4 This is a schematic diagram of the internal structure of the shell of the utility model;

[0021] The meanings of the reference numerals are as follows:

[0022] 10. Shell; 11. Wiring opening; 12. Limit baffle; 121. First plate section; 122. Second plate section; 123. Third plate section; 124. Limit groove; 13. Wiring interval; 14. Wiring groove; 15. Installation cavity; 16. Positioning column; 20. Wind wheel; 21. Blade; 211. Arc guide surface; 212. Air duct; 22. Connecting rib; 23. Mounting seat; 24. Reinforcing rib; 25. Connecting shaft. DETAILED DESCRIPTION

[0023] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0026] See also Figures 1 to 4 The utility model discloses a heat dissipation fan, including a shell 10 and a wind wheel 20. The shell 10 has an installation cavity 15, and the wind wheel 20 is installed in the installation cavity 15. Specifically, the wind wheel 20 includes a plurality of blades 21, a mounting seat 23 and two connecting ribs 22. The plurality of blades 21 are circumferentially spaced along the central axis of the mounting seat 23, one of the connecting ribs 22 is located at the top of the plurality of blades 21 and is sequentially connected to the outer edges of the plurality of blades 21, the other connecting rib 22 is located at the bottom of the plurality of blades 21, and is sequentially connected to the inner edges of the plurality of blades 21, and the mounting seat 23 is connected to one of the connecting ribs 22.

[0027] On the basis of the above structure, during assembly, the outer edges of the top ends of the multiple blades 21 are first connected in sequence through one of the connecting ribs 22, and the inner edges of the bottom ends of the multiple blades 21 are connected in sequence through another connecting rib 22, and then, the mounting seat 23 is connected to the connecting rib 22 located on the inner side of the multiple blades 21 to connect the top ends and bottom ends of the multiple blades 21 in series and form an integral structure with the mounting seat 23, thereby enhancing the stability of the multiple blades 21, allowing them to maintain a stable shape and position during high-speed rotation, reducing deformation caused by vibration or wind impact, and improving the overall stability and reliability of the wind wheel 20.

[0028] When assembling the existing multiple blades 21, they are usually connected in sequence at the middle position or side wall of the blade 21 through the connecting ribs 22. Since the connecting ribs 22 usually have a certain width, when they are connected with the multiple blades 21, they may more or less partially cover the contact area of ​​the blade 21, resulting in a reduction in the effective area of ​​the blade 21, which means that the wind force that can be captured is also reduced accordingly. It may also interfere with the airflow around the blade 21, affecting the aerodynamic performance of the blade 21, and even generating unnecessary vortices and noise.

[0029] Therefore, when using the cooling fan in this embodiment, during assembly, after the wind wheel 20 is installed in the installation cavity 15, the mounting seat 23 is connected to the shell 10 and the rotor and other components, so that it can rotate to generate wind energy after being energized. During rotation, since multiple blades 21 are connected in sequence, the connecting ribs 22 are connected to the outer edge and the inner edge of the blade 21, so that the connecting ribs 22 minimize the blocking area of ​​the front side (i.e., the windward side) of the blade 21, ensuring that the effective swept wind area of ​​the blade 21 is maximized after the blade 21 is connected, thereby capturing more wind energy. Under the same wind speed, the increase in the swept wind area means that more wind energy can be converted into mechanical energy or electrical energy, so that the wind force generated by the wind wheel 20 when rotating at high speed is also greater, avoiding the phenomenon of aerodynamic loss caused by the blocking of the connecting ribs 22.

[0030] Furthermore, a wiring opening 11 is provided on the shell 10, and the wiring opening 11 is connected with the installation cavity 15. A limit baffle 12 is also provided on the periphery of the shell 10. The limit baffle 12 is spaced apart from the periphery of the shell 10 and forms a wiring interval 13. A limit groove 124 is also provided on the limit baffle 12, and the limit groove 124 is connected with the wiring interval 13.

[0031] On the basis of this structure, when in use, the wires inside the shell 10 can be led out through the wiring opening 11 and directly extended to the wiring interval 13, and inserted into the wiring interval 13. At this time, the inner wall of the wiring interval 13 blocks the side of the wires, making it difficult for them to move. Then the wires are led out from the wiring interval 13 and inserted into the limiting groove 124 on the limiting baffle 12, so that the groove wall of the limiting groove 124 blocks and limits the wires up, down, left and right, making it difficult for them to move up, down, left and right, thereby further ensuring that the overall wiring is more regular and the exterior is more simple and beautiful.

[0032] It should be noted that the limit baffle 12 in this embodiment can be glued, welded or integrally formed on the outer periphery of the shell 10, and the limit groove 124 on the limit baffle 12 can be formed by enclosing or semi-enclosing multiple plate segments, or can be formed on the limit baffle 12 by mechanical cutting.

[0033] When the limiting groove 124 is formed by semi-enclosing a plurality of plate segments, the limiting groove 124 can limit the wires from the top and left and right sides. After the wires are led out from the wiring opening 11 and passed through the wiring interval 13, the end wall of the shell 10 indirectly limits the bottom of the wires. After the wires are passed through the limiting groove 124, their top, bottom, left and right sides are all limited, thereby reducing the risk of their string movement.

[0034] Furthermore, the limiting baffle 12 includes a first plate segment 121, a second plate segment 122 and a third plate segment 123, and the first plate segment 121, the second plate segment 122 and the third plate segment 123 are semi-enclosed to form a limiting groove 124. During assembly, the first plate segment 121 is connected to the shell 10, the second plate segment 122 is connected to the top end of the first plate segment 121, the second plate segment 122 is spaced from the periphery of the shell 10 and forms a wiring gap 13, and the third plate segment 123 is vertically connected to an end of the second plate segment 122 away from the first plate segment 121, and extends toward a wiring direction.

[0035] On this basis, the limiting groove 124 in this embodiment is formed by semi-enclosing the first plate segment 121, the second plate segment 122 and the third plate segment 123. When routing, the first plate segment 121 blocks one side of the wire after the wire is passed through the routing interval 13. When it is connected to the limiting groove 124, the third plate segment 123 extends toward the routing direction, that is, if the wire needs to be connected toward the bottom of the shell 10, the third plate segment 123 extends toward the bottom of the shell 10, so that the other side of the wire can always be blocked by the third plate segment 123 away from the first plate segment 121. At the same time, the bottom and top of the wire are respectively limited by the end wall of the shell 10 and the second plate end to ensure that the wire is not easily moved.

[0036] More specifically, a wiring groove 14 is provided on the shell 10, one end of the wiring groove 14 is connected to the wiring port 11, and the other end of the wiring groove 14 extends to the wiring interval 13 and is connected to the wiring interval 13. In this way, the wires are directly extended into the wiring groove 14 after being led out through the wiring port 11. At this time, the inner wall of the wiring groove 14 limits the outer periphery of the wires, and initially limits them so that the wires are neatly placed in the wiring groove 14. The wires will not protrude from the end face of the shell 10, avoiding the problem of disorderly wires in traditional wiring methods.

[0037] In addition, since there may be multiple circuits inside the shell 10, they are usually integrated into a circuit board or a terminal block and then extended into the shell 10 to connect with the internal components. To facilitate the installation of the terminal block or the circuit board, the inner diameter of the wiring opening 11 usually needs to adapt to the inner diameter of the terminal block or the circuit board. The inner diameter of the wiring opening 11 is also relatively large during design. If the inner diameter of the wiring trough 14 is also consistent with the wiring opening 11, the wiring trough 14 may be too wide and the wires may be sparsely arranged. The inner wall of the wiring trough 14 cannot limit the multiple wires, thereby making it impossible to ensure that the wires are arranged compactly and orderly in the wiring trough 14, making the arrangement of the wires appear messy and affecting the overall aesthetic effect. Therefore, in this embodiment, the inner diameter of the wiring opening 11 is larger than the inner diameter of the wiring trough 14. The inner diameter of the wiring trough 14 can be designed to be more compact according to the specific number of wires and the design layout requirements, ensuring that the wires can be compactly arranged in the wiring trough 14, so that the wiring trough 14 can play a limiting role, ensuring that multiple wires are compactly and orderly arranged in the wiring trough 14, and ensuring that the wiring outside the shell 10 is smooth.

[0038] Furthermore, the plurality of blades 21 are circumferentially spaced apart along the central axis of the mounting seat 23 , and an air duct 212 is formed between every two adjacent blades 21 .

[0039] Based on the above structure, when the blades 21 are installed, multiple blades 21 can be axially spaced apart along the central axis of the mounting seat 23, so that an air duct 212 can be formed between two adjacent blades 21, so that the wind wheel 20 can guide the air through the air duct 212 to generate wind energy when rotating.

[0040] More specifically, multiple blades 21 are each provided with an arc guide surface 211, which can guide the airflow into the air duct 212, and the design of the arc surface can make the aerodynamic characteristics of the blade 21 more stable, which helps to evenly distribute and efficiently convert wind energy on the blade 21. This design can maximize the capture of wind energy and convert it into mechanical energy, thereby increasing the wind force generated when the blade 21 rotates.

[0041] In addition, the design of the arc surface helps to improve the airflow field around the blade 21. Compared with the blade 21 with straight or sharp edges, the arc surface can guide the airflow more smoothly and reduce the separation of the airflow and the generation of vortices at the edge of the blade 21. This improvement in the flow field helps to reduce the generation of aerodynamic noise, thereby making the wind wheel 20 quieter when rotating at high speed.

[0042] Furthermore, during assembly, the connecting ribs 22 located on the inner edge of the blade 21 are spaced apart from the mounting seat 23 and connected by at least six reinforcing ribs 24, so that the mounting seat 23 and the multiple blades 21 can form a more stable support structure, so that the blades 21 can withstand greater wind force and mechanical stress, and the spacing setting can change the vibration mode of the blade 21 system and reduce its vibration frequency, which helps to reduce the occurrence of resonance and reduce the noise of the blades 21 during operation.

[0043] In addition, the number and distribution of the reinforcing ribs 24 as connecting parts between the blades 21 and the mounting seat 23 directly affect the stability and bearing capacity of the entire structure. Therefore, in this embodiment, at least six reinforcing ribs 24 are arranged. Since at least six reinforcing ribs 24 are evenly spaced circumferentially along the central axis of the mounting seat 23, the six reinforcing ribs 24 can form a more stable support system in the circumferential direction of the wind wheel 20, effectively dispersing the stress and load generated by the blades 21 during rotation, and preventing structural damage caused by stress concentration. The effect of dispersing stress is enhanced with the increase in the number of reinforcing ribs 24, thereby improving the overall stiffness of the entire wind wheel 20 and making it less prone to deformation.

[0044] More specifically, a positioning column 16 is further provided in the shell 10, and a connecting shaft 25 is provided at the bottom of the mounting seat 23. Specifically, when the wind wheel 20 is installed in the mounting cavity 15, the connecting shaft 25 can be rotatably inserted into the positioning column 16, so that the wind wheel 20 can be rotatably installed in the shell 10, so that it can rotate to generate wind energy after power is supplied.

[0045] It should be noted that the connecting shaft 25 is specifically disposed at the axis of the wind wheel 20 , and the positioning column 16 is coaxial with the connecting shaft 25 to ensure the stability of the wind wheel 20 during the rotation process.

[0046] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A cooling fan, characterized in that: include: A housing having a mounting cavity; A wind wheel, wherein the wind wheel is installed in the installation cavity; the wind wheel comprises a plurality of blades, a mounting seat and two connecting ribs, wherein the plurality of blades are circumferentially spaced along the central axis of the mounting seat, wherein one of the connecting ribs is located at the top of the plurality of blades and is sequentially connected to the outer edges of the plurality of blades, and the other connecting rib is located at the bottom of the plurality of blades and is sequentially connected to the inner edges of the plurality of blades; the mounting seat is connected to one of the connecting ribs.

2. The heat dissipation fan according to claim 1, characterized in that: The shell is provided with a wiring opening, and the wiring opening is connected with the installation cavity. The shell is also provided with a limit baffle on its periphery, and the limit baffle is spaced from the periphery of the shell to form a wiring interval. The limit baffle is also provided with a limit groove, and the limit groove is connected with the wiring interval.

3. The heat dissipation fan according to claim 2, characterized in that: The limiting baffle includes a first plate segment, a second plate segment and a third plate segment, and the first plate segment, the second plate segment and the third plate segment are semi-enclosed to form the limiting groove; the first plate segment is connected to the shell, and the second plate segment is connected to the top end of the first plate segment; the second plate segment is spaced from the periphery of the shell and forms the routing interval, and the third plate segment is vertically connected to an end of the second plate segment away from the first plate segment, and extends toward a routing direction.

4. The heat dissipation fan according to claim 3, characterized in that: The housing is provided with a wiring groove, one end of which is communicated with the wiring opening, and the other end of which extends to the wiring interval and passes through the wiring interval.

5. The heat dissipation fan according to claim 4, characterized in that: The inner diameter of the wiring opening is larger than the inner diameter of the wiring groove.

6. The heat dissipation fan according to claim 1, characterized in that: The plurality of blades are arranged at intervals in the circumferential direction along the central axis of the mounting seat, and an air duct is formed between every two adjacent blades.

7. The heat dissipation fan according to claim 6, characterized in that: The plurality of blades are each provided with an arc guide surface, and the plurality of arc guide surfaces are used to guide the airflow into the air duct.

8. The heat dissipation fan according to claim 1, characterized in that: The connecting ribs are spaced apart from the mounting seat and connected via at least six reinforcing ribs, and the at least six reinforcing ribs are evenly spaced apart and distributed circumferentially along the central axis of the mounting seat.

9. The heat dissipation fan according to claim 1, characterized in that: A positioning column is arranged in the shell, and a connecting shaft is arranged in the mounting seat. The connecting shaft can be rotatably inserted into the positioning column so that the wind wheel is rotatably connected to the shell.

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