Cooling fan with reinforcing structure

Abstract

The utility model discloses a cooling fan with a reinforcing structure, which comprises a central hub, fan blades and annular ribs, and the fan blades are uniformly arranged around the central hub through fan blade roots; the annular rib surrounds the middle positions of the fan blades in the horizontal direction and connects the fan blades into a whole; air guide notches are formed in the portions, between the adjacent fan blades, of the annular ribs, and airflow can be guided through the air guide notches. According to the cooling fan, the fan blades are connected into a whole through the annular ribs, deformation of the fan blades is prevented, and the cooling requirements of different devices can be met by arranging the air guide notches in different positions.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, especially a heat dissipation fan with reinforcing structure. BACKGROUND

[0002] The heat dissipation fan is widely used in computer, communication product, photoelectric product, automobile electronic equipment, medical equipment, automobile refrigerator, welding machine, refrigeration equipment and traditional or modern instrument equipment, and the main function of these heat dissipation fans is to dissipate heat through air flow and keep the temperature inside equipment in the safe range.

[0003] When the heat dissipation fan works, vortex and turbulence are generated in the fan due to the influence of external vibration or uneven wind resistance to each fan blade, and then noise is emitted; the fan blade with weak mechanical property may even be deformed or damaged after long-term use. In order to strengthen the structural stability of the fan blade during work, the overall structure of the fan is usually improved in the prior art to reduce the vibration of the fan blade, but the improvement is limited. In the prior art, reinforcing rib structures are arranged between each fan blade to enhance the structural strength of the fan blade, but the structures increase the wind resistance of the fan and are not conducive to the flow of air flow, so it is necessary to improve the structure of the heat dissipation fan. SUMMARY

[0004] To solve the above technical problems, the utility model provides a heat dissipation fan with reinforcing structure, including center hub and the multiple fan blades that spiral extension from the circumference of center hub, still including annular rib that is arranged in the outside of center hub, the annular rib is connected in proper order each fan blade, and the part of annular rib between adjacent fan blades is equipped with air guide gap.

[0005] According to an embodiment of the utility model, the air guide gap is located at the air inlet side edge or the air outlet side edge of the annular rib.

[0006] According to an embodiment of the utility model, the annular rib forms continuous support part on the opposite side of the air guide gap, and the fan blade extends from the support part to the air guide gap.

[0007] According to an embodiment of the utility model, the annular rib has long side and short side connected with the opposite surfaces of adjacent two fan blades respectively.

[0008] According to an embodiment of the utility model, the long side covers and connects the fan blade along the width direction of the fan blade.

[0009] According to an embodiment of the utility model, the air guide gap is concave arc, and the two ends of the arc are transitionally connected with the long side and the short side respectively.

[0010] According to an embodiment of the utility model, when the air guide gap is located at the air inlet side, the long edge is connected to the leeward surface of the fan blade; when the air guide gap is located at the air outlet side, the long edge is connected to the windward surface of the fan blade.

[0011] According to an embodiment of the utility model, the annular rib is connected to the leading edge side of the fan blade away from the center hub.

[0012] According to an embodiment of the utility model, the width dimension of the fan blade gradually increases from the inside to the outside.

[0013] According to an embodiment of the utility model, the annular rib is parallel to the center axis of the center hub in the axial direction.

[0014] The utility model discloses a heat dissipation fan with reinforcing structure, including center hub, fan blade and annular rib, and the fan blade is evenly arranged around the center hub through the fan blade blade root, the annular rib is around the horizontal direction middle position of fan blade, and will be connected into an organic whole with fan blade, and the part of annular rib between adjacent fan blades is equipped with air guide gap, can be guided to the airflow through the air guide gap. The heat dissipation fan is connected into an organic whole with fan blade through the annular rib, prevents the deformation of fan blade, through setting up the air guide gap at different positions, can satisfy the heat dissipation demand of different equipment ACCURACY OF DRAWINGS

[0015] Figure 1 It is the structural schematic diagram of the heat dissipation fan with reinforcing structure embodiment 1 of the utility model,

[0016] Figure 2 It is another schematic diagram of the heat dissipation fan with reinforcing structure embodiment 1 of the utility model,

[0017] Figure 3 It is the side view of the heat dissipation fan with reinforcing structure embodiment 1 of the utility model,

[0018] Figure 4 It is the structural schematic diagram of the heat dissipation fan with reinforcing structure embodiment 2 of the utility model,

[0019] Figure 5 It is another schematic diagram of the heat dissipation fan with reinforcing structure embodiment 2 of the utility model,

[0020] Figure 6 It is the side view of the heat dissipation fan with reinforcing structure embodiment 2 of the utility model.

[0021] Center hub 1, fan blade 2, fan blade root 21, fan blade leading edge 22, fan blade trailing edge 23, annular rib 3, air inlet side edge 31, air outlet side edge 32, air guide gap 33, long edge 34, short edge 35, support part 36. DETAILED DESCRIPTION

[0022] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0026] Example 1: Figures 1-2 A cooling fan with a reinforced structure shown in FIG. 1 includes a central hub 1 and a plurality of fan blades 2 extending spirally outward from the circumference of the central hub 1. The blade roots 21 of the fan blades 2 are evenly arranged around the central hub 1. The fan blade roots 21 are tilted and fixed to the periphery of the central hub 1 at an angle of 1 to 90 degrees. By tilting and fixing the fan blade roots 21 and the central hub 1, the fan blades 2 can generate greater thrust when rotating, optimize the airflow direction, reduce instability in the airflow, and thus improve the power efficiency of the air.

[0027] According to the direction of air flow when the fan rotates, the fan is divided into the air inlet side and the air outlet side. Figure 3As shown, the airflow flows from top to bottom along the spiral surface of the blade 2. An annular rib 3 is provided in an annular direction on the outer side of the center hub 1. The annular rib 3 is sequentially connected to the outer side of each blade 2 to connect each blade 2 into a whole, thereby increasing the connection strength between the blades 2 and preventing the blades 2 from deforming. The annular rib 3 is provided with an air guide notch 33 in the part between adjacent blades 2, which can guide the airflow between the blades 2. The annular rib 3 is axially parallel to the central axis of the center hub 1, and the annular rib 3 is a columnar structure as a whole, so that the airflow direction has a certain central concentration. The annular rib is connected to the leading edge side of the blade 2 away from the center hub 1, the leading edge 22 of the blade is supported by the annular rib 3, and the trailing edge 23 of the blade is supported by the center hub 1, thereby ensuring the stability of the blade 2 during rotation.

[0028] The annular rib 3 surrounds the middle position of the fan blade 2 in the horizontal direction, including the air inlet side edge 31 and the air outlet side edge 32. The air guide notch 33 is located on the air inlet side of the annular rib 3 and extends from the air inlet side edge 31 of the annular rib 3. The airflow enters from the air inlet side, is guided by the air guide notch 33, and is dispersed to the leading edge of the fan blade 2, reducing the stress concentration of the airflow and distributing the stress more evenly, thereby reducing the risk of material fatigue and fracture, improving the performance of the cooling fan as a whole, and extending the life of the cooling fan. The width of the fan blade 2 gradually increases from the inside to the outside, which can provide a larger stress dispersion space for the fan blade 2. The air outlet side edge 32 of the annular rib 3 is a continuous annular support portion 36. Each fan blade 2 extends from the support portion 36 in the direction of the air guide notch 33. The support portion 36 can provide basic support for the entire annular rib 3, reduce the uneven force on the air inlet side of the annular rib 3 due to inconsistent airflow in various places, and maintain the support stability of the fan blade 2.

[0029] like Figure 3 As shown, the connection between the annular rib 3 and the two adjacent blades 2 is a long side 34 and a short side 35. The short side 35 is located on the windward side of the blade 2. When the airflow enters between the blades 2, it will be guided as much as possible to the entire leading edge of the blade 2; while the long side 34 is located on the leeward side of the blade 2, which can support the blade 2 as much as possible and provide sufficient support. The long side 34 is further configured to cover and connect to the blade 2 along the width direction of the blade 2 to maximize the support capacity of the long side 34. The stress generated by the airflow is distributed across the entire width of the blade 2.

[0030] Furthermore, the air guide notches 33 of the annular rib 3 are concave arcs, with the two ends of the arc transitionally connected to the long side 34 and the short side 35, respectively. The arc-shaped air guide notches 33 are located at the air inlet edge 31 of the annular rib, and each air guide notch is evenly distributed between two adjacent blades 2. The air inlet edge 31 of the annular rib 3 is connected to the vertical center of the blade 2. Locating the air guide notches 33 of the annular rib 3 near the air inlet area allows airflow to enter the cooling fan blade 2 area more smoothly, reducing turbulence and eddy currents on the air inlet side, thereby making the flow of gas on the cooling fan air inlet side more stable.

[0031] The fan blades 2 can be twisted blades. Through the twisted blade design, the airflow path during the operation of the cooling fan can be optimized, the aerodynamic load on the fan blades 2 can be evenly distributed, and the flow of air or gas on the fan blades 2 can be smoother and more efficient, reducing turbulence and resistance, and reducing noise, thereby enhancing the heat dissipation effect and helping the equipment to dissipate heat better.

[0032] The advantages of the present invention lie in that, by improving the structural design of the fan blades 2 and annular ribs 3, the cooling fan can generate greater airflow during operation, improving heat dissipation efficiency. Furthermore, the design of the annular ribs 3 improves the structural stability of the cooling fan and reduces noise. Furthermore, the air guide notches in the annular ribs 3 help reduce air resistance, further improving heat dissipation. The present invention has a simple structure, is easy to manufacture, and is suitable for improving various cooling fans, with broad application prospects.

[0033] like Figures 4-6 The second embodiment shown provides a cooling fan with a reinforced structure. Its structure is essentially the same as that of the first embodiment, except that the air guide notch 33 is located at the air outlet edge 32 of the annular rib 3, while the support portion 36 is located at the air inlet edge 31 of the annular rib 3. This maintains stable airflow on the air inlet side. After entering, the airflow accelerates and flows toward the air guide notch 33, thereby increasing the wind pressure output on the air outlet side of the cooling fan. Throughout the entire air flow process, the long side 34 is connected to the windward side of the fan blade 2, providing support for the fan blade 2.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heat dissipating fan with a reinforcing structure, characterized by, The fan comprises a central hub (1) and a plurality of fan blades (2) spirally extending outward from the circumference of the central hub (1), and a ring-shaped rib (3) arranged outside the central hub (1) and sequentially connected to the fan blades (2), wherein the ring-shaped rib (3) is provided with a wind guide gap (33) between adjacent fan blades (2).

2. The heat dissipating fan with a reinforcing structure according to claim 1, wherein, The wind guide gap (33) is located at the air inlet side edge (31) or the air outlet side edge (31) of the ring-shaped rib (3).

3. The heat dissipating fan with a reinforcing structure according to claim 2, wherein, The ring-shaped rib (3) forms a continuous annular support portion (36) on the opposite side of the wind guide gap (33), and the fan blade (2) extends from the support portion (36) to the wind guide gap (33).

4. The heat dissipating fan with a reinforcing structure according to claim 2, wherein, The ring-shaped rib (3) has a long side (34) and a short side (35) connected to the opposite surfaces of two adjacent fan blades (2).

5. The heat dissipating fan with a reinforcing structure according to claim 4, wherein, The long side (34) covers and connects to the fan blade (2) along the width direction of the fan blade (2).

6. The heat dissipating fan with a reinforcing structure according to claim 4, wherein, The wind guide gap (33) is an arc-shaped concave gap, and the two ends of the arc-shaped gap are transitionally connected to the long side (34) and the short side (35), respectively.

7. The heat dissipating fan with a reinforcing structure according to claim 4, wherein When the wind guide gap (33) is located at the air inlet side, the long side (34) is connected to the leeward surface of the fan blade (2); when the wind guide gap (33) is located at the air outlet side, the long side (34) is connected to the windward surface of the fan blade (2).

8. The heat dissipating fan with a reinforcing structure as recited in claim 2, wherein, The ring-shaped rib (3) is connected to the leading edge side of the fan blade (2) away from the central hub (1).

9. The heat dissipating fan with a reinforcing structure as recited in claim 2, wherein, The width of the fan blade (2) gradually increases from the inside to the outside.

10. The heat dissipating fan with a reinforcing structure according to claim 2, wherein, The ring-shaped rib (3) is parallel to the central axis of the central hub (1) in the axial direction.

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