Cooling fan

Abstract

The utility model provides a cooling fan. The cooling fan comprises a pivoting part, a circumferential extension part, an outer frame and a plurality of blades. The circumferential extension part surrounds and is connected to the pivot part. The outer frame is arranged on the periphery of the pivoting part and the periphery of the circumferential extending part and separates the pivoting part from the circumferential extending part. The blades are connected with the circumferential extension part and the outer frame, are separated from the pivoting part and have various lengths. By means of the design, the volume of noise generated when the heat dissipation air radiator rotates can be reduced.

Description

Technical Field

[0001] This case relates to a heat dissipation fan. Background Art

[0002] The existing cooling fan generates a relatively loud noise when in operation, which results in a poor user experience when using the fan. Utility Model Content

[0003] The present invention provides a heat dissipation fan, which includes a pivoting portion, a circumferential extension portion, an outer frame, and a plurality of blades. The circumferential extension portion surrounds and is connected to the pivoting portion. The outer frame is disposed at the periphery of the pivoting portion and the circumferential extension portion, and separates the pivoting portion and the circumferential extension portion. The blades connect the circumferential extension portion and the outer frame, and are separated from the pivoting portion, and the blades have various lengths.

[0004] Based on the above, the heat dissipation fan of the present invention includes a pivoting portion, a circumferential extension portion, an outer frame, and a plurality of blades. The blades are connected to the circumferential extension portion and separated from the pivoting portion, and have various lengths. Accordingly, when the heat dissipation fan is running, the heat dissipation fan generates turbulence through the blades of different lengths to reduce the noise volume generated during operation.

[0005] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1A is a three-dimensional diagram of a heat dissipation fan according to an embodiment of the present invention;

[0007] Figure 1B yes Figure 1A Front view of the cooling fan;

[0008] Figure 1C yes Figure 1A Rear view of the cooling fan;

[0009] Figure 2 is a front view of a heat dissipation fan according to another embodiment of the present invention;

[0010] Figure 3 is a front view of a heat dissipation fan according to yet another embodiment of the present invention;

[0011] Description of Reference Numerals

[0012] 100, 100a, 100b: cooling fans;

[0013] 110: pivoting portion;

[0014] 111: top wall;

[0015] 113: annular side wall;

[0016] 120: circumferential extension;

[0017] 130: outer frame;

[0018] 140: leaves;

[0019] 140A, 140B, 140C: blade group;

[0020] 141: first blade;

[0021] 143: second blade;

[0022] 145: third blade;

[0023] A: axis;

[0024] L1~L3: length;

[0025] X, Y, Z: axial directions. DETAILED DESCRIPTION

[0026] Figure 1A It is a three-dimensional diagram of a heat dissipation fan according to an embodiment of the present case. Figure 1B yes Figure 1A Front view of the cooling fan. Figure 1C yes Figure 1A Rear view of the cooling fan. Figures 1A to 1C The heat dissipation fan 100 of this embodiment is, for example, a turbo fan, and includes a pivot portion 110, a circumferential extension portion 120, an outer frame 130, and a plurality of blades 140. The circumferential extension portion 120 surrounds and is connected to the pivot portion 110. The outer frame 130 is disposed at the periphery of the pivot portion 110 and the circumferential extension portion 120, and separates the pivot portion 110 and the circumferential extension portion 120. The blades 140 connect the circumferential extension portion 120 and the outer frame 130, and are separated from the pivot portion 110. The blades 140 have various lengths L1, L2 (shown in FIG. Figure 1B ).

[0027] In this embodiment, the cooling fan 100 is, for example, axially extending along an axis A (shown in FIG. Figure 1A ) is the axis of rotation, and the axis A is parallel to the axis Z and perpendicular to the axis X and the axis Y. When the cooling fan 100 is running, the cooling fan 100 brings in air along the axis A, and sends the brought in air after turning it 90 degrees. In this process, the cooling fan 100 uses the blades 140 of various lengths L1 and L2 to make the brought in air flow turbulent, so as to reduce the noise volume generated when the cooling fan 100 is running.

[0028] The specific structure of the heat dissipation fan 100 is described in detail below.

[0029] Please refer to Figure 1AThe pivoting portion 110 includes a top wall 111 and an annular side wall 113 extending from the top wall 111. The blades 140 are located at the circumference of the pivoting portion 110. The circumferentially extending portion 120 is as shown in FIG. Figure 1C The outer frame 130 is shown to be annular and connected to the annular side wall 113 at a position away from the top wall 111. The outer frame 130 surrounds the top wall 111.

[0030] In this embodiment, the outer frame 130 and the top wall 111 are located on adjacent planes, but the present invention is not limited thereto. In other embodiments, the outer frame 130 and the top wall 111 may also be located on the same plane.

[0031] In this embodiment, projections of the outer frame 130 and the circumferential extending portion 120 on a plane perpendicular to the axial direction Z do not overlap with each other, but the present invention is not limited thereto.

[0032] The specific structure of these blades 140 will be described in detail below.

[0033] Please refer to Figure 1B The blades 140 are divided into a plurality of blade groups 140A arranged in succession. Each of the blade groups 140A includes a portion of the blades 140, and the portion of the blades 140 includes a plurality of lengths L1 and L2. In the present embodiment, the number of blades 140 in each blade group 140A is three, but the number of blades 140 in each blade group 140A is not limited thereto.

[0034] In detail, Figure 1B As shown, each blade set 140A of this embodiment includes a first blade 141 and two second blades 143 , and the two second blades 143 are located on the same side of the first blade 141 . In addition, the length L1 of the first blade 141 is greater than the length L2 of the second blade 143 .

[0035] In this embodiment, the two second blades 143 are located on the left side of the first blade 141. In addition, in this embodiment, the number of the second blades 143 is two, but the number of the second blades 143 is not limited thereto. In other embodiments, the number of the second blades 143 may also be, for example, three or four.

[0036] The heat dissipation fan 100 of the present embodiment has a first blade 141 with a length L1 different from a second blade 143 with a length L2, so that the airflow becomes turbulent after flowing in from the air inlet, thereby reducing the noise volume generated by the heat dissipation fan 100. On the other hand, when the heat dissipation fan 100 of the present embodiment generates noise with the same volume as that of the existing heat dissipation fan, the speed of the heat dissipation fan 100 of the present embodiment can be 200 revolutions more than that of the existing heat dissipation fan, that is, when the noise volume generated is the same, the heat dissipation fan 100 of the present embodiment has a better performance.

[0037] Figure 2FIG. 1 is a front view of a cooling fan according to another embodiment of the present invention. Figure 2 The heat dissipation fan 100a of this embodiment is Figure 1B The difference of the heat dissipation fan 100 shown is that the blade assembly 140B of the present embodiment includes a first blade 141, a second blade 143 and a third blade 145 arranged in sequence, and the multiple lengths include three lengths L1, L2, and L3. The first blade 141, the second blade 143 and the third blade 145 have lengths L1, L2, and L3, respectively. In the present embodiment, the length L1 of the first blade 141, the length L2 of the second blade 143 and the length L3 of the third blade 145 increase in a clockwise direction, so that the airflow becomes a turbulent state after flowing in from the air inlet, thereby reducing the noise volume generated by the heat dissipation fan 100a. Figure 2 The remaining configuration and operation mode of the cooling fan 100a in the embodiment shown are the same or similar to those described above. Figure 1B The heat dissipation fan 100 of the illustrated embodiment will not be described in detail herein.

[0038] Figure 3 FIG. 1 is a front view of a cooling fan according to another embodiment of the present invention. Figure 3 The cooling fan 100b of this embodiment is Figure 2 The difference of the cooling fan 100a shown is that the length L1 of the first blade 141, the length L2 of the second blade 143 and the length L3 of the third blade 145 of the blade assembly 140C of this embodiment decrease in the clockwise direction, so that the airflow becomes turbulent after flowing in from the air inlet, thereby reducing the noise volume generated by the cooling fan 100b. Figure 3 The remaining configuration and operation mode of the cooling fan 100b in the embodiment shown are the same or similar to those in the above Figure 2 The heat dissipation fan 100a of the illustrated embodiment will not be described in detail herein.

[0039] In summary, the heat dissipation fan of the present invention comprises a pivoting portion, a circumferentially extending portion, an outer frame, and a plurality of blades. The blades are connected to the circumferentially extending portion and separated from the pivoting portion, and have various lengths. Accordingly, when the heat dissipation fan is running, the heat dissipation fan generates turbulence through the blades of different lengths to reduce the noise volume generated during operation.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present case, rather than to limit it. Although the present case has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or part or all of the technical features can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present case.

Claims

1. A cooling fan, characterized in that: include: A pivoting portion; a circumferentially extending portion surrounding and connected to the pivot portion; An outer frame, disposed at the periphery of the pivoting portion and the circumferentially extending portion, and separating the pivoting portion and the circumferentially extending portion; as well as A plurality of blades are connected to the circumferential extension portion and the outer frame and are separated from the pivot portion. The plurality of blades have various lengths.

2. The heat dissipation fan according to claim 1, characterized in that: The plurality of blades are divided into a plurality of blade groups arranged in succession, each of the plurality of blade groups includes a portion of the plurality of blades, and the portion of the plurality of blades includes the plurality of lengths.

3. The heat dissipation fan according to claim 2, characterized in that: The plurality of blades of the portion include a first blade and at least one second blade, and the length of the first blade is greater than the length of the at least one second blade.

4. The heat dissipation fan according to claim 3, characterized in that: The at least one second blade is two second blades.

5. The heat dissipation fan according to claim 4, characterized in that: In each of the plurality of blade groups, the two second blades are located on the same side of the first blade.

6. The heat dissipation fan according to claim 2, characterized in that: The plurality of blades of the portion include a first blade, a second blade, and a third blade arranged in sequence, and the plurality of lengths include three lengths.

7. The heat dissipation fan according to claim 6, characterized in that: The length of the first blade, the length of the second blade, and the length of the third blade decrease in a clockwise direction.

8. The heat dissipation fan according to claim 6, characterized in that: The length of the first blade, the length of the second blade, and the length of the third blade increase in a clockwise direction.

9. The heat dissipation fan according to claim 1, characterized in that: The pivoting portion comprises a top wall and an annular side wall extending from the top wall. The plurality of blades are located at the circumference of the pivoting portion. The circumferentially extending portion is annular and connected to a portion of the annular side wall away from the top wall.

10. The heat dissipation fan according to claim 9, characterized in that: The outer frame surrounds the top wall.

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