Cooling fan

Abstract

The utility model discloses a cooling fan which comprises a base, a fan body, a fan cover and a fan body. The base is provided with a bottom plate and a coupling part. The upper cover and the bottom plate piece are oppositely arranged in a spaced mode in the vertical direction; the peripheral wall is formed on the periphery of the base and the upper cover to fix the base and the upper cover at an interval, and the base, the upper cover and the peripheral wall jointly form a mounting cavity; the fan wheel is rotatably mounted in the mounting cavity, and a rotating shaft of the fan wheel is coupled to the coupling part; the air inlet penetrates through the upper cover part in the axial direction of the fan wheel; the air outlet is communicated with the mounting cavity and the outside in the radial direction of the fan wheel, and the bottom plate piece is sequentially defined outwards in the radial direction of the fan wheel with the coupling part as the center to form a center area A1, a functional area A2 and a peripheral area A3; the circuit board assembly is attached to the upper surface of the central area A1; and the ventilation holes penetrate through the functional area A2 formed in the bottom plate part in the axial direction of the fan wheel, and the ventilation holes are distributed in a specific array mode, so that the bottom plate part has good structural strength and an auxiliary air inlet effect.

Description

Technical Field

[0001] The present application relates to a heat dissipation fan. Background Art

[0002] When the computer is working, the internal key chips such as the central processing unit, north and south bridges, graphics card, and key components such as the hard disk and memory will generate heat, which will increase the internal temperature of the computer. Since the normal operation of each chip and component in the computer has certain requirements for the operating temperature, when the temperature is too high, the chips and components will become unstable or even damaged. Therefore, the heat dissipation system plays a vital role in the reliable and stable operation of the computer.

[0003] The existing cooling system of laptop computers usually uses heat pipes to transfer the heat generated by the heating elements in the host to the cooling fins, and dissipates the heat through convection heat exchange between the fan and the cooling fins to reduce the temperature of the heating elements and achieve the purpose of cooling and heat dissipation.

[0004] For the related prior art, reference may be made to Chinese utility model patent CN219119505U, which discloses a fan wheel and a heat dissipation fan. The heat dissipation fan 100 comprises a housing 10 and a fan wheel 20 rotatably disposed in the housing 10. The housing 10 comprises an installation cavity 11, the top of the housing 10 is provided with an air inlet 12 connected to the installation cavity 11, and one side of the housing 10 is provided with an air outlet 13 connected to the installation cavity 11. The fan wheel assembly 20 is accommodated in the installation cavity 11, and drives the air flow by rotating to achieve the purpose of heat dissipation.

[0005] For more details, please refer to the attached prior art manual. Figure 1 As shown in the figure, three large auxiliary air inlets are provided on the bottom plate of the housing to realize the auxiliary air intake function. However, it is found in actual products that the large design of such auxiliary air inlets will affect the structural strength of the bottom plate, resulting in poor flatness, easy deformation, and inability to withstand large external pressure, which is what the industry often calls poor back pressure performance after entering the system (after the cooling fan is assembled inside the electronic device); if the auxiliary air inlet is designed to be very small, the auxiliary air intake effect will be poor.

[0006] Therefore need to propose a kind of brand-new improved design to solve above-mentioned technical problems. Utility Model Content

[0007] The purpose of the present application is to provide a new heat dissipation fan having good structural strength and auxiliary air intake effect.

[0008] To achieve the above objectives, this application adopts the following technical solutions:

[0009] A heat dissipation fan, comprising:

[0010] A base, comprising a bottom plate and a shaft connection portion formed at a middle position of an upper surface of the bottom plate;

[0011] An upper cover is arranged opposite to the bottom plate in an up-down direction with a spacing therebetween;

[0012] A peripheral wall is formed on the periphery of the base and the upper cover to space and fix the base and the upper cover in the up-down direction, and the base, the upper cover and the peripheral wall together form a mounting cavity;

[0013] A fan wheel is rotatably installed in the installation cavity, the rotating shaft of the fan wheel is axially connected to the axial connection part, and the fan wheel includes a motor housing and a fan blade assembly consisting of a plurality of fan blades arranged at intervals and extending outward from the outer periphery of the motor housing;

[0014] An air inlet is formed on the upper cover portion along the axial direction of the impeller, and the air inlet is located directly above the impeller along the axial direction;

[0015] The air outlet is connected to the installation cavity and the outside in a radial direction perpendicular to the axial direction of the impeller, wherein:

[0016] The bottom plate is defined in sequence along the radial direction of the impeller with the shaft connection portion as the center to form a central area A1, a functional area A2 and a peripheral area A3;

[0017] A circuit board assembly is attached to the upper surface of the central area A1;

[0018] A plurality of ventilation holes are formed along the axial direction of the impeller and through the functional area A2 of the bottom plate, and the plurality of ventilation holes are arranged in a specific array;

[0019] Along the radial direction of the impeller, the outer periphery of the functional area A2 does not exceed the outer peripheral edge of the impeller.

[0020] Furthermore, along the radial direction of the impeller, the functional area A2 is located outside the area where the motor housing is located.

[0021] Furthermore, along the radial direction of the impeller, the functional area A2 is located on the inner side of the edge of the air inlet.

[0022] Furthermore, along the radial direction of the impeller, the outer circumference of the functional area A2 overlaps with the edge of the air inlet.

[0023] Furthermore, along the axial direction of the impeller, the functional area A2 is located directly below the fan blade assembly and does not exceed the area where the fan blade assembly is located.

[0024] Furthermore, the ventilation holes are of the same size.

[0025] Furthermore, each of the ventilation holes is a circular hole or an equilateral polygonal hole.

[0026] Furthermore, a plurality of the ventilation holes are arranged at intervals on the same arc with the shaft connection portion as the center to form a ventilation ring;

[0027] The plurality of ventilation rings are arranged concentrically, and the spacing between any two adjacent ventilation rings is equal;

[0028] The distances between any two adjacent ventilation holes on the same ventilation ring are equal.

[0029] Furthermore, a line connecting any one of the ventilation holes on any one of the ventilation rings and the closest ventilation hole on an adjacent ventilation ring and the diameter of the impeller are not on the same straight line.

[0030] Furthermore, the bottom plate has a plurality of clearance holes formed through the central area A1 along the axial direction of the impeller, and the clearance holes are used to make way for corresponding structures on the road plate assembly.

[0031] Furthermore, the bottom plate is provided with a wire hole penetrating along the axial direction of the impeller at the connection position between the central area A1 and the functional area A2; a part of the wire hole is formed in the central area A1, and another part is formed in the functional area A2.

[0032] The beneficial effects of the present application are that the bottom plate has good structural strength and auxiliary air intake effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present application will be further described below in conjunction with drawings and embodiments.

[0034] Figure 1 It is a three-dimensional schematic diagram of the heat dissipation fan of the present application.

[0035] Figure 2 yes Figure 1 A top view of the cooling fan is shown in FIG.

[0036] Figure 3 yes Figure 1 The partial exploded view of the cooling fan shown in the figure specifically shows the schematic diagram after the upper cover is separated from the base, and the display angle is a top-down angle.

[0037] Figure 4 yes Figure 1 The top view of the cooling fan shown in the figure specifically shows the internal structure through dotted lines, and focuses on the positional relationship between the air inlet, the fan wheel and the functional area A2.

[0038] Figure 5 yes Figure 1 FIG. 1 is a three-dimensional schematic diagram of the heat dissipation fan viewed from another angle.

[0039] Figure 6 yes Figure 5The exploded view of the cooling fan shown in the figure specifically shows a three-dimensional schematic diagram after the insulation patch is peeled off from the bottom plate.

[0040] Figure 7 yes Figure 1 Bottom view of the cooling fan shown in . DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] Please refer to Figures 1 to 7 As shown, the heat dissipation fan of the present application is a centrifugal heat dissipation fan, which includes a housing (not numbered) and a fan wheel 4 and a stator assembly (not shown) assembled in the housing, and the fan wheel 4 can rotate relative to the housing with a rotating shaft. The housing forms a mounting cavity 10 inside, and an air inlet 21 connecting the mounting cavity 10 with the outside is formed at the top of the housing along the axial direction of the rotating shaft; at least one side of the housing is formed with an air outlet 30 connecting the mounting cavity 10 with the outside along a radial direction perpendicular to the axial direction of the rotating shaft. The rotation of the fan wheel 4 causes the working fluid to flow into the housing through the air inlet 21, and flow out of the housing through the air outlet 30, thereby achieving the purpose of heat dissipation.

[0043] Please refer to Figures 1 to 4 As shown, the housing includes a base 1, an upper cover 2 and a peripheral wall 3. The base 1 is provided with a bottom plate 11 and a shaft connection portion (not shown) formed at a middle position on the upper surface of the bottom plate 11. The upper cover 2 is arranged opposite to the bottom plate 11 in an up-down direction. The peripheral wall 3 is formed around the base 1 and the upper cover 2 to space and fix the base 1 and the upper cover 2 in an up-down direction. The base 1, the upper cover 2 and the peripheral wall 3 are jointly arranged to form the installation cavity 10.

[0044] In the embodiment of the present application, the bottom plate 11 and the upper cover 2 are both formed by processing metal plates. The peripheral wall 3 is first formed around the bottom plate 11 by integral injection molding of an insulating material, and the upper cover 2 is arranged on the peripheral wall 3 from top to bottom and then fixed to the peripheral wall 3 by hot riveting. Specifically, it can be: the peripheral wall 3 is formed with a plurality of hot pressing columns (unnumbered) upward, and the hot pressing columns are correspondingly inserted into the hot pressing holes (unnumbered) formed on the upper cover 2 and fixed by hot melting. Furthermore, the air inlet 21 is formed on the upper cover 2 along the axial direction of the impeller 4, and the air inlet 21 is located directly above the impeller 4.

[0045] Please refer to Figures 1 to 4As shown, the impeller 4 is rotatably installed in the installation cavity 10. Specifically, the impeller 4 includes a motor housing 41 and a blade assembly 42 composed of a plurality of spaced blades (unnumbered) extending outward from the outer circumference of the motor housing 41; of course, the impeller 4 may also be provided with a structural ring (unnumbered) that integrally connects the free ends of the plurality of blades to improve excessive vibration of the blades during the rotation of the impeller 4 and reduce noise. Furthermore, a rotating shaft (unnumbered) may be integrated in the middle position of the lower surface of the motor housing 41 of the impeller 4, and the impeller 4 is rotatably connected to the shaft connection portion on the bottom plate 11 via the rotating shaft.

[0046] Please refer to Figure 6 Combined with Figure 2 , Figure 3 and Figure 4 As shown, the bottom plate 11 is defined in sequence along the radial direction of the impeller 4 with the shaft connection as the center to form a central area A1, a functional area A2 and a peripheral area A3. The heat dissipation fan of the present application may also include a circuit board assembly 5, which is sleeved on the outer periphery of the shaft connection and adhered to the upper surface of the central area A1 (adherence here does not specifically refer to complete adhesion, including the situation of being suspended above the upper surface of the central area A1). The circuit board assembly 5 can be integrated with the stator assembly (not shown) or can be separately arranged from the stator assembly. The stator assembly is electrically coupled to the motor housing of the impeller 4 to drive the impeller 4 to rotate.

[0047] There are also a number of ventilation holes 110, which are formed in the functional area A2 of the bottom plate 11 along the axial direction of the impeller 4, and the ventilation holes 110 are arranged in a specific array. Among them, each ventilation hole 110 is preferably a circular hole or an equilateral polygonal hole, and an equilateral hexagonal hole is preferably used. Specifically, a plurality of ventilation holes 110 are arranged on the same arc with the shaft connection as the center to form a ventilation ring (not shown), and a plurality of ventilation rings are arranged concentrically. In a preferred embodiment, the spacing between any two adjacent ventilation rings is equal. In a preferred embodiment, the spacing between any two adjacent ventilation holes 110 on the same ventilation ring is equal. In a preferred embodiment, the center line between any one of the ventilation holes 110 on any one of the ventilation rings and the closest one of the ventilation holes 110 on the adjacent one of the ventilation rings does not pass through the rotation axis of the impeller 4. In a preferred embodiment, four ventilation rings are provided. Through the above-mentioned array-arranged ventilation hole 110 structure, while achieving a good auxiliary air intake function, it is possible to ensure that the bottom plate 11 has a good structural strength. The bottom plate 11 has good flatness and pressure resistance, so that the cooling fan has good pressure resistance after being installed inside the electronic equipment (after entering the system).

[0048] Please refer to Figures 1 to 7 As shown, a flow channel is formed between the outer periphery of the impeller 4, the inner wall surface of the peripheral wall 3, the lower surface of the upper cover 2, and the upper surface of the peripheral area A3. Specifically, the impeller 4 rotates to cause the working fluid to flow into the housing through the air inlet 21, and after centrifugal acceleration by the impeller 4, it flows out of the housing through the flow channel and from the air outlet 30. In a preferred embodiment, the motor housing 41 is located directly above the central area A1 along the axial direction of the impeller 4. In a preferred embodiment, along the radial direction of the impeller 4, the outer periphery of the functional area A2 does not exceed the outer periphery of the impeller 4 (that is, the ventilation holes 110 are not arranged to extend throughout the flow channel). In a preferred embodiment, along the radial direction of the impeller 4, the functional area A2 is located outside the area where the motor housing 41 is located. In a preferred embodiment, along the radial direction of the impeller 4, the functional area A2 is located on the inner side of the edge of the air inlet 21. In a preferred embodiment, along the radial direction of the impeller 4, the outer circumference of the functional area A2 overlaps with the edge of the air inlet 21. It should be noted that the overlap mentioned here does not specifically refer to complete overlap, but includes a range of positive and negative differences of 3 mm inside and outside the complete overlap (that is, the outer circumference of the functional area A2 can be set within a range of positive and negative 3 mm of the radius of the inner circumference of the air inlet 21). In a preferred embodiment, along the axial direction of the impeller 4, the functional area A2 is located directly below the fan blade assembly 42 and does not exceed the area where the fan blade assembly 42 is located.

[0049] Furthermore, in a preferred embodiment of the present application, the sizes of the ventilation holes 110 are the same, and the intervals between two adjacent ventilation rings are equal.

[0050] Please refer to Figure 6 As shown, the bottom plate member 11 is formed with a plurality of clearance holes 112 penetrating along the axial direction of the impeller 4 in the central area A1, and the clearance holes 112 are used to make way for the corresponding structures on the circuit board assembly 5 (such as driving chips, electronic components, or lead-out metal pins, etc.). In the present application, the clearance holes 112 are structures that must be set. When there is no need to make way for the circuit board assembly 5, the clearance holes 112 are set as few as possible or not set. The bottom plate member 11 is formed with a wire clearance hole 113 penetrating along the axial direction of the impeller 4 at the connection position between the central area A1 and the functional area A2; a part of the wire clearance hole 113 is formed in the central area A1, and the other part is formed in the functional area A2. Similarly, in the present application, the wire clearance hole 113 is a structure that must be set. When there is no need to make way, the wire clearance hole 113 can also be cancelled.

[0051] In the present application, by forming an array of ventilation holes 110 in a specific area of ​​the bottom plate 11, the bottom plate 11 can have a good structural strength and can also achieve a good auxiliary air intake effect. The array arrangement method in the present application refers to a regular arrangement method, and its ultimate goal is to make the bottom plate 11 have a good structural strength and can also achieve a good auxiliary air intake effect. Therefore, the array arrangement method does not only refer to the examples shown in the drawings of the specification.

[0052] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0053] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other design methods that can be understood by those skilled in the art.

Claims

1. A cooling fan, characterized in that: include: A base, comprising a bottom plate and a shaft connection portion formed at a middle position of an upper surface of the bottom plate; An upper cover is arranged opposite to the bottom plate in an up-down direction with a spacing therebetween; A peripheral wall is formed on the periphery of the base and the upper cover to space and fix the base and the upper cover in the up-down direction, and the base, the upper cover and the peripheral wall together form a mounting cavity; A fan wheel is rotatably installed in the installation cavity, the rotating shaft of the fan wheel is axially connected to the axial connection part, and the fan wheel includes a motor housing and a fan blade assembly consisting of a plurality of fan blades arranged at intervals and extending outward from the outer periphery of the motor housing; An air inlet is formed on the upper cover portion along the axial direction of the impeller, and the air inlet is located directly above the impeller along the axial direction; The air outlet is connected to the installation cavity and the outside in a radial direction perpendicular to the axial direction of the impeller, wherein: The bottom plate is defined in sequence along the radial direction of the impeller with the shaft connection portion as the center to form a central area A1, a functional area A2 and a peripheral area A3; A circuit board assembly is attached to the upper surface of the central area A1; A plurality of ventilation holes are formed along the axial direction of the impeller and through the functional area A2 of the bottom plate, and the plurality of ventilation holes are arranged in a specific array; Along the radial direction of the impeller, the outer periphery of the functional area A2 does not exceed the outer peripheral edge of the impeller.

2. The cooling fan according to claim 1, characterized in that: Along the radial direction of the impeller, the functional area A2 is located outside the area where the motor housing is located.

3. The heat dissipation fan according to claim 1, characterized in that: Along the radial direction of the impeller, the functional area A2 is located on the inner side of the edge of the air inlet.

4. The heat dissipation fan according to claim 1, characterized in that: Along the radial direction of the impeller, the outer circumference of the functional area A2 overlaps with the edge of the air inlet.

5. The heat dissipation fan according to claim 1, characterized in that: Along the axial direction of the impeller, the functional area A2 is located directly below the fan blade assembly and does not exceed the area where the fan blade assembly is located.

6. The cooling fan according to any one of claims 1 to 5, characterized in that: The ventilation holes are of the same size.

7. The cooling fan according to any one of claims 1 to 5, characterized in that: Each of the ventilation holes is a circular hole or an equilateral polygonal hole.

8. The cooling fan according to any one of claims 1 to 5, characterized in that: The plurality of ventilation holes are arranged at intervals on the same arc with the shaft connection portion as the center to form a ventilation ring; The plurality of ventilation rings are arranged concentrically, and the spacing between any two adjacent ventilation rings is equal; The distances between any two adjacent ventilation holes on the same ventilation ring are equal.

9. The heat dissipation fan according to claim 8, characterized in that: A line connecting any one of the ventilation holes on any one of the ventilation rings and the closest ventilation hole on an adjacent ventilation ring and the diameter of the impeller are not on the same straight line.

10. The cooling fan according to any one of claims 1 to 5, characterized in that: The bottom plate member is provided with a plurality of clearance holes penetrating along the axial direction of the impeller in the central area A1, and the clearance holes are used to make way for corresponding structures on the road plate assembly.

11. The cooling fan according to any one of claims 1 to 5, characterized in that: The bottom plate has a wire hole formed therethrough along the axial direction of the impeller at the connection position between the central area A1 and the functional area A2; a portion of the wire hole is formed in the central area A1, and another portion is formed in the functional area A2.

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