Fan and electronic equipment

Abstract

The invention relates to the technical field of electronic equipment, in particular to a fan and electronic equipment. The fan provided by the embodiment of the invention comprises a hub, a first connecting ring and a second connecting ring, the first connecting ring is arranged around the hub, a plurality of first blades are arranged between the hub and the first connecting ring, and the first blades extend from the hub to the first connecting ring; a second connecting ring is arranged around the first connecting ring, a plurality of second blades are arranged between the first connecting ring and the second connecting ring, and the second blades extend from the first connecting ring to the second connecting ring; the number of the second blades is larger than that of the first blades. According to the fan provided by the embodiment of the utility model, the impedance of the fan blades can be reduced, so that the suction force to air can be increased, and the overall heat dissipation performance of a system is improved.

Description

Technical Field

[0001] This patent relates to the technical field of electronic equipment, and in particular to a fan and electronic equipment. Background Art

[0002] Air cooling is still a widely used form of heat dissipation. Air cooling uses a cooling fan to dissipate heat. During operation, the cooling fan can increase the air circulation rate and transfer the heat in a specific area to the outside in a timely manner. The fan has multiple blades arranged in a ring on the periphery of the central hub. The airflow is sucked into the space between the blades along the axial direction of the central hub through the rotation of the blades, and then discharged outward along the centrifugal direction of the blade rotation. In order to obtain greater efficiency, traditional fans usually increase the number of fan blades, but the narrow spacing between adjacent blades will affect the airflow, increase wind resistance, and reduce the performance of the fan. Summary of the invention

[0003] This patent provides a fan and an electronic device to at least solve the above technical problems existing in the prior art.

[0004] The first aspect of the present invention provides a fan, comprising:

[0005] Wheels:

[0006] A first connecting ring, arranged around the hub, a plurality of first blades are arranged between the hub and the first connecting ring, and the first blades extend from the hub to the first connecting ring;

[0007] A second connecting ring is arranged around the first connecting ring, a plurality of second blades are arranged between the first connecting ring and the second connecting ring, and the second blades extend from the first connecting ring to the second connecting ring;

[0008] Wherein, the number of the second blades is greater than the number of the first blades.

[0009] Furthermore, along the extension direction of the first blade, the thickness of the first blade gradually decreases.

[0010] Furthermore, the first blade and one of the plurality of second blades are an integral structure.

[0011] Further, the second blade includes a first connecting section and a second connecting section connected to each other, and the first connecting section is arranged close to the first blade;

[0012] Wherein, along the direction from the first connecting ring to the second connecting ring, the width of the first connecting section gradually increases.

[0013] Further, along the direction from the first connecting ring to the second connecting ring, the first connecting segment is bent toward a direction approaching the first connecting ring, and the second connecting segment is bent toward a direction away from the first connecting ring.

[0014] Furthermore, the bending directions of the first connecting section and the second connecting section are opposite.

[0015] Furthermore, an angle α between an end of the first connecting segment away from the second connecting segment and a tangent direction of the first connecting ring satisfies: 35°≤α≤50°.

[0016] Furthermore, the angle β between the end of the second connecting segment away from the first connecting segment and the tangent direction of the second connecting ring satisfies: 90°≤β≤115°. Furthermore, the number of the second blades is 3 to 7 times the number of the first blades;

[0017] And / or, the first connecting ring is a silent ring.

[0018] Furthermore, the plurality of first blades are evenly arranged around the hub, the plurality of second blades are evenly arranged around the first connecting ring, and the surrounding direction of the plurality of first blades is the same as the surrounding direction of the plurality of second blades.

[0019] Furthermore, the fan further comprises a third connecting ring, the third connecting ring is arranged around the second connecting ring, a plurality of third blades are arranged between the second connecting ring and the third connecting ring, and the third blades extend from the second connecting ring to the third connecting ring;

[0020] Wherein, the number of the third blades is greater than the number of the second blades.

[0021] A second aspect of the present disclosure provides an electronic device, comprising the fan described in the first aspect.

[0022] The technical solution provided by this patent embodiment has the following advantages compared with the prior art:

[0023] The fan provided by the embodiment of the present patent includes a hub, a first connecting ring and a second connecting ring. The first connecting ring is arranged around the hub, and a plurality of first blades are arranged between the hub and the first connecting ring, and the first blades extend from the hub to the first connecting ring; the second connecting ring is arranged around the first connecting ring, and a plurality of second blades are arranged between the first connecting ring and the second connecting ring, and the second blades extend from the first connecting ring to the second connecting ring; wherein the number of the second blades is greater than the number of the first blades. When the hub rotates, the high-speed rotating blades will generate an outward force on the surrounding air, which is the centrifugal force. Outside the first blade and the second blade, the air will form a rotating airflow. Under the guidance of the fan housing, this airflow is decelerated and pressurized, and finally discharged at the fan outlet. The first blade and the second blade drive the air intake to rotate at high speed with the blades. In this embodiment, a plurality of first blades are arranged between the hub and the first connecting ring, and a plurality of second blades are arranged between the first connecting ring and the second connecting ring. The number of the second blades is greater than the number of the first blades. The number of the second blades is large, which can greatly increase the amount of air entering the fan. The number of the first blades is small, which can reduce the air inlet impedance and increase the air volume, thereby improving the overall heat dissipation performance of the system. The number of the second blades is greater than the number of the first blades, which can reduce the impedance of the fan blades, thereby increasing the suction force of the air, thereby improving the overall heat dissipation performance of the system.

[0024] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of this patent, nor is it intended to limit the scope of this patent. Other features of this patent will become easy to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other purposes, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0026] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0027] Figure 1 The structure of the fan provided by the embodiment of the present invention is shown Figure 1 ;

[0028] Figure 2 The structure of the fan provided by the embodiment of the present invention is shown Figure 2 .

[0029] Explanation of the numbers in the figure: 1, hub; 2, first connecting ring; 3, second connecting ring; 4, first blade; 5, second blade; 51, first connecting section; 52, second connecting section. DETAILED DESCRIPTION

[0030] In order to make the purpose, features, and advantages of this patent more obvious and easy to understand, the technical solutions in the embodiments of this patent will be clearly and completely described below in conjunction with the drawings in the embodiments of this patent. Obviously, the described embodiments are only part of the embodiments of this patent, not all of them. Based on the embodiments in this patent, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this patent.

[0031] Combination Figure 1 and Figure 2 As shown, the fan provided by the embodiment of the present patent includes a hub 1, a first connecting ring 2 and a second connecting ring 3. The first connecting ring 2 is arranged around the hub 1, and a plurality of first blades 4 are arranged between the hub 1 and the first connecting ring 2, and the first blades 4 extend from the hub 1 to the first connecting ring 2; the second connecting ring 3 is arranged around the first connecting ring 2, and a plurality of second blades 5 are arranged between the first connecting ring 2 and the second connecting ring 3, and the second blades 5 extend from the first connecting ring 2 to the second connecting ring 3; wherein the number of the second blades 5 is greater than the number of the first blades 4. When the hub 1 rotates, the high-speed rotating blades will generate an outward force on the surrounding air, which is the centrifugal force. Outside the first blade 4 and the second blade 5, the air will form a rotating airflow. Under the guidance of the fan casing, this airflow is decelerated and pressurized, and finally discharged at the fan outlet. The first blade 4 and the second blade 5 drive the air intake and rotate at high speed with the blades. In this embodiment, a plurality of first blades 4 are provided between the hub 1 and the first connecting ring 2, and a plurality of second blades 5 are provided between the first connecting ring 2 and the second connecting ring 3. The number of second blades 5 is greater than the number of first blades 4. A large number of second blades 5 can greatly increase the amount of air entering the fan, while a small number of first blades 4 can reduce the wind inlet impedance and increase the air volume, thereby improving the overall heat dissipation performance of the system. The number of second blades 5 is greater than the number of first blades 4, which can reduce the impedance of the fan blades, thereby increasing the suction force on the air, thereby improving the overall heat dissipation performance of the system.

[0032] In this embodiment, the first connecting ring 2 and the second connecting ring 3 can form a double silent ring structure, which can increase the structural strength of the fan on the one hand, reduce the vibration coefficient of the friction between the first blade 4 and the second blade 5 and the air when rotating at high speed, and make the airflow in the contact area between the first blade 4 and the second blade 5 and the air smoother; on the other hand, it can pressurize and prevent backflow for the fan to generate a stable, high-pressure airflow.

[0033] Optionally, the second blade 5 is inserted into the second connecting ring 3, which can improve the stability of the second blade 5 and the stability of the connection between the second blade 5 and the second connecting ring 3, thereby improving the structural strength and stability of the fan.

[0034] In some specific embodiments, the number of first blades 4 is 14 to 20. An increase in the number of first blades 4 will affect the air intake. The number of first blades 4 is 14 to 20 to avoid the impact of too many blades on the fan air intake. Within the parameter range of 14 to 20, the more hubs there are, the less air intake per unit time, but the air guided from the first blade 4 to the second blade 5 is smoother.

[0035] Preferably, the number of the first blades 4 is 15, so that the air guided from the first blades 4 to the second blades 5 can flow more smoothly.

[0036] In some specific embodiments, the radial distance between the first connecting ring 2 and the second connecting ring 3 is 18 to 25 mm. On the one hand, the structural strength of the fan can be increased, so that the air guided from the first blade 4 to the second blade 5 can be smoother, and the airflow in the contact area between the first blade 4 and the second blade 5 and the air can be smoother; on the other hand, the vibration coefficient of the friction between the first blade 4 and the second blade 5 and the air when rotating at high speed can be reduced, and the fan can be pressurized and backflow prevented to generate a stable, high-pressure airflow.

[0037] In some specific embodiments, the thickness of the first blade 4 gradually decreases along the extension direction of the first blade 4. On the one hand, it reduces the vibration coefficient of the friction between the first blade 4 and the air when rotating at high speed, making the airflow in the contact area of ​​the first blade 4 and the air smoother. On the other hand, it has the advantages of lightness, less material, and can reduce the overall weight.

[0038] In some specific embodiments, the first blade 4 and one of the multiple second blades 5 are an integrated structure, which can increase the structural strength of the fan, improve the stability of the fan, and guide the airflow to the second blade 5 to make the airflow smoother.

[0039] In some specific embodiments, the second blade 5 includes a first connecting segment 51 and a second connecting segment 52 that are connected to each other, and the first connecting segment 51 is arranged close to the first blade 4; wherein, along the direction from the first connecting ring 2 to the second connecting ring 3, the width of the first connecting segment 51 gradually increases, which can increase the amount of air entering the fan and reduce the impedance of the fan blades, thereby increasing the suction force on the air, thereby improving the overall heat dissipation performance of the system.

[0040] In some specific embodiments, along the direction from the first connecting ring 2 to the second connecting ring 3, the first connecting segment 51 is bent toward the direction close to the first connecting ring 2, and the second connecting segment 52 is bent toward the direction away from the first connecting ring 2, which can increase the amount of air entering the fan and reduce the impedance of the fan blades, thereby increasing the suction force on the air, thereby improving the overall heat dissipation performance of the system. The first connecting segment 51 is bent toward the direction close to the first connecting ring 2, making the airflow smoother.

[0041] In some specific embodiments, the bending directions of the first connecting section 51 and the second connecting section 52 are opposite, so that the airflow is smoother, the amount of air entering the fan can be increased, and the impedance of the fan blades can be reduced, thereby increasing the suction force on the air, thereby improving the overall heat dissipation performance of the system.

[0042] In some specific embodiments, the angle α between the end of the first connecting segment 51 away from the second connecting segment 52 and the tangent direction of the first connecting ring 2 satisfies: 35°≤α≤50°; the angle α between the end of the first connecting segment 51 away from the second connecting segment 52 and the tangent direction of the first connecting ring 2 represents the wind inlet angle of the fan, 35°≤α≤50°, so that while the air intake volume is increased, the air resistance can be reduced, the fan speed can be increased, and the noise can be reduced.

[0043] Preferably, the angle α between the end of the first connecting section 51 away from the second connecting section 52 and the tangent direction of the first connecting ring 2 is 105°, so that the air resistance is small while the air intake volume is increased, thereby increasing the speed of the fan.

[0044] In some specific embodiments, the angle β between the end of the second connecting segment 52 away from the first connecting segment 51 and the tangent direction of the second connecting ring 3 satisfies: 90°≤β≤115°. The angle β between the end of the second connecting segment 52 away from the first connecting segment 51 and the tangent direction of the second connecting ring 3 represents the wind outlet angle, 90°≤β≤115°, which can increase the swept wind area per unit time, and while increasing the swept wind area per unit time, make the load on the fan blades lighter and reduce noise.

[0045] Preferably, the angle β between the end of the second connecting section 52 away from the first connecting section 51 and the tangent direction of the second connecting ring 3 is 51°, which increases the wind sweeping area per unit time while making the load on the fan blades lighter and increasing the fan speed. In some specific embodiments, the number of second blades 5 is 3 to 7 times the number of first blades 4, reducing the impedance of the fan blades and increasing the amount of air entering the fan, thereby increasing the suction force on the air and improving the overall heat dissipation performance of the system.

[0046] And / or, the first connecting ring 2 is a silent ring, and the second connecting ring 3 is a silent ring, forming a double silent ring structure, which can increase the structural strength.

[0047] In some specific embodiments, multiple first blades 4 are evenly arranged around the hub 1, and multiple second blades 5 are evenly arranged around the first connecting ring 2. The surrounding direction of the multiple first blades 4 is the same as the surrounding direction of the multiple second blades 5, which can improve the stability of the fan.

[0048] In some specific embodiments, the fan further includes a third connecting ring, which is arranged around the second connecting ring 3, and a plurality of third blades are arranged between the second connecting ring 3 and the third connecting ring, and the third blades extend from the second connecting ring 3 to the third connecting ring; wherein the number of the third blades is greater than the number of the second blades 5. The amount of air entering the fan can be greatly increased, and the number of the first blades 4 is small, which can reduce the air intake impedance and increase the air volume, thereby improving the overall heat dissipation performance of the system. The number of the third blades is greater than the number of the second blades 5, which can reduce the impedance of the fan blades, thereby increasing the suction force on the air, thereby improving the overall heat dissipation performance of the system.

[0049] In this embodiment, a first connecting ring 2 is added between the first blade 4 and the second blade 5 to increase the structural strength.

[0050] Two fans are sampled below, one is a traditional fan, and the other is a fan provided by the embodiment of the present disclosure. The rotation speed at the same dB value and the flow rate at the same dB are compared through measured data.

[0051] Table 1 shows the measured comparative noise data of two types of fan blades, where fan blade 1 is a blade of a conventional fan, and fan blade 2 is a blade of a fan provided in an embodiment of the present disclosure, including a first blade 4 and a second blade 5 .

[0052] SPL unit is dB(A)

[0053] Table 1 Fan dB value comparison

[0054]

[0055] From the measured data, we can see that the speed of blade 2 is consistent with that of blade 1. When the fan has a certain resistance and voltage, the more air intake, the more air output it will bring. From the above data, the speed displayed by the two fan blades is the same under the same noise condition. In terms of noise value, the performance of the two fans is the same.

[0056] Table 2 is the measured flow rate comparison data of the two fans, where blade 1 is a blade of a conventional fan, and blade 2 is a blade of a fan provided by an embodiment of the present disclosure, including a first blade 4 and a second blade 5. The flow rate unit is CFM.

[0057] Table 2 Fan flow value comparison

[0058]

[0059] From the measured data, it can be seen that under the same noise conditions, the overall flow rate of Fan Blade 2 becomes larger. At 50dB, the total flow rate of Fan Blade 2 is nearly 0.5CFM larger than that of Fan Blade 1, and the overall flow rate is increased by 10%.

[0060] From the above test results, it can be seen that the new type of gradient separation fan blades is feasible for use in the system, which is beneficial for increasing air volume and improving performance.

[0061] The fan provided by the embodiment of the present disclosure is formed by reducing the number of first blades 4 in the blade root area, i.e., between the hub 1 and the first connecting ring 2, and connecting the second blades 5 at the tail end of the blades with several thick first blades 4, and adding a first connecting ring 2 between the first blades 4 and the second blades 5, so as to increase the structural strength. At the same time, the first connecting ring 2 and the second connecting ring 3 form a double silent ring structure. The double silent ring structure also has the benefit of reducing the vibration of the fan, reducing the vibration coefficient of the friction between the first blades 4 and the second blades 5 and the air when rotating at high speed, and making the airflow in the contact area between the first blades 4 and the second blades 5 and the air smoother.

[0062] Table 3 Gradual separation fan parameters

[0063]

[0064] In some specific implementations, the fan parameters are as shown in Table 3. This article introduces that the number of the first thick blades 4 in the middle is 15, and the first connecting ring 2 and the second connecting ring 3 form a double silent ring. All parameters include but are not limited to the above parameters. This embodiment only introduces the design of this parameter alone. For the fan flow channel, this embodiment does not introduce too much, because the performance of different fan blades is compared with the same fan frame. Therefore, the conditions are the same, and only the fan blades are compared. The traditional fan blades are not as good as the new gradient separation fan blades in this article in terms of flow.

[0065] In summary, in the fan provided by the embodiment of the present disclosure, the fan blades are composed of a plurality of first blades 4 and second blades 5. When the hub 1 rotates, the first blades 4 and the second blades 5 drive the air intake and the blades to rotate at high speed. This new fan blade structure can greatly increase the air entering the fan blades. Since the impedance of the fan blades is reduced, the suction force on the air is also greater. The high-speed rotating blades will generate an outward force on the surrounding air. This force is the centrifugal force. Outside the fan blades, the air will form a rotating airflow. This airflow is guided by the fan casing, decelerated and pressurized, and finally discharged at the fan outlet. As the air intake increases, the air volume at the fan outlet also increases under the same conditions. At this time, a low pressure is formed at the center of the impeller, and more air is sucked in again, thereby forming a circulating airflow.

[0066] The electronic device provided by the embodiment of the present disclosure includes the fan provided by the embodiment of the present disclosure. Since the electronic device provided by the embodiment of the present disclosure has the same advantages as the fan provided by the embodiment of the present disclosure, they will not be described in detail here.

[0067] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this patent can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution of this patent can be achieved, and this document does not limit it here.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying 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 of the features. In the description of this patent, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0069] The above are only specific implementations of this patent, but the protection scope of this patent is not limited to this. Any technician familiar with this technical field can easily think of changes or substitutions within the technical scope disclosed in this patent, which should be covered by the protection scope of this patent. Therefore, the protection scope of this patent should be based on the protection scope of the claims.

Claims

1. A fan, characterized in that: include: Wheel hub (1): A first connecting ring (2) is arranged around the wheel hub (1), a plurality of first blades (4) are arranged between the wheel hub (1) and the first connecting ring (2), and the first blades (4) extend from the wheel hub (1) to the first connecting ring (2); a second connecting ring (3) arranged around the first connecting ring (2), a plurality of second blades (5) being arranged between the first connecting ring (2) and the second connecting ring (3), and the second blades (5) extending from the first connecting ring (2) to the second connecting ring (3); Wherein, the number of the second blades (5) is greater than the number of the first blades (4).

2. The fan according to claim 1, characterized in that Along the extension direction of the first blade (4), the thickness of the first blade (4) gradually decreases.

3. The fan according to claim 1, characterized in that: The first blade (4) and one of the plurality of second blades (5) are of an integral structure.

4. The fan according to claim 1, characterized in that: The second blade (5) comprises a first connecting section (51) and a second connecting section (52) which are connected to each other, and the first connecting section (51) is arranged close to the first blade (4); Wherein, along the direction from the first connecting ring (2) to the second connecting ring (3), the width of the first connecting section (51) gradually increases.

5. The fan according to claim 4, characterized in that: Along the direction from the first connecting ring (2) to the second connecting ring (3), the first connecting section (51) bends in a direction approaching the first connecting ring (2), and the second connecting section (52) bends in a direction away from the first connecting ring (2); Alternatively, the bending directions of the first connecting section (51) and the second connecting section (52) are opposite.

6. The fan according to claim 4, characterized in that: The included angle α between the end of the first connecting section (51) away from the second connecting section (52) and the tangent direction of the first connecting ring (2) satisfies: 35°≤α≤50°; And / or, an angle β between an end of the second connecting section (52) away from the first connecting section (51) and a tangent direction of the second connecting ring (3) satisfies: 90°≤β≤115°.

7. The fan according to claim 1, characterized in that: The number of the second blades (5) is 3 to 7 times the number of the first blades (4); And / or, the first connecting ring (2) is a silent ring.

8. The fan according to claim 1, characterized in that A plurality of the first blades (4) are evenly arranged around the hub (1), and a plurality of the second blades (5) are evenly arranged around the first connecting ring (2), and the surrounding direction of the plurality of the first blades (4) is the same as the surrounding direction of the plurality of the second blades (5).

9. The fan according to claim 1, characterized in that: It also comprises a third connecting ring, the third connecting ring is arranged around the second connecting ring (3), a plurality of third blades are arranged between the second connecting ring (3) and the third connecting ring, and the third blades extend from the second connecting ring (3) to the third connecting ring; Wherein, the number of the third blades is greater than the number of the second blades (5).

10. An electronic device, characterized in that: The fan comprises the fan according to any one of claims 1 to 9.

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