Double-outlet heat dissipation fan

Abstract

The utility model discloses a double air outlet heat dissipation fan, including base and upper cover, shell, the middle part of base is inserted with the shaft sleeve, the inside of shaft sleeve is equipped with gasket and bearing, the top of shaft sleeve is equipped with shaft seal, the outside of shaft sleeve is equipped with stator, the top of bearing outside is equipped with fan blade, the middle part of fan blade inboard is equipped with the axle, and the axle is inserted in the inside of bearing, and the end of axle projects in fan blade hub end face, the upper cover is covered on the base, the utility model discloses through the axle projecting in fan blade hub end face, in the drop test, it is the preferential stress point, can guarantee fan normal operation, and the fan wall is combined by multiple groups of disconnected wall, and the frame has multiple breakpoint parts, and the breakpoint quantity is determined according to the size of fan, wherein there is a metal sheet, to increase the stress intensity, and the plastic outer frame will not deform, and the metal sheet of disconnected part helps the electrostatic discharge of upper and lower metal cover plate.

Description

Technical Field

[0001] This utility model relates to the field of laptop cooling fan technology, specifically a dual-outlet cooling fan. Background Technology

[0002] As laptops become thinner, lighter, and more powerful, the power consumption and heat generation of their internal core components such as processors and graphics cards continue to rise. Heat dissipation efficiency has become a key factor affecting the stability of device performance, lifespan, and user experience. Among these, the cooling fan, as the core component of the laptop's active cooling system, directly determines the overall effectiveness of the cooling system.

[0003] In drop tests, the fan blades of mainstream laptops are the primary point of impact, and the entire component is easily damaged. Laptop cooling fans, made entirely of plastic, are prone to deformation after the plastic frame is injection molded. Utility Model Content

[0004] The purpose of this invention is to provide a dual-outlet cooling fan to solve the existing problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dual-outlet cooling fan, comprising a base and an upper cover and a housing that cover the base. After the base and the upper cover are combined, a wall is formed at their edges to increase stress strength and prevent the plastic frame from deforming. A first air outlet is provided on the wall, and a second air outlet is provided on the side of the housing opposite to the first air outlet. The cooling fan also includes a drive assembly and fan blades; the drive assembly includes a bushing disposed on the base and a bearing disposed within the bushing, a stator is provided on the outer side of the bushing, and a shim for axial positioning of the bearing is provided inside the bushing, a shaft is provided in the middle of the inner side of the fan blade, the shaft is inserted into the bearing, and the end of the shaft protrudes from the hub end face of the fan blade.

[0006] Preferably, the base is provided with an airfoil-shaped support column, which helps to improve the aerodynamic flow field.

[0007] Preferably, the outer side of the base is provided with a metal bending plate for connecting the top cover and the base.

[0008] Preferably, the outer surface of the bushing has a stepped structure, which serves to isolate copper shavings and to support the fan base when heavy objects impact it. The top of the bushing is provided with a shaft seal, which is adapted to the bushing.

[0009] Preferably, the wall is made of plastic and is wrapped around the outside of a metal bent plate to enhance stress strength and prevent deformation.

[0010] Preferably, the fence includes multiple sets of discontinuous sub-fences, and gaps are formed between adjacent sub-fences.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This dual-outlet cooling fan forms a dual air outlet channel, effectively increasing the coverage and efficiency of the cooling airflow; With its shaft protruding from the end face of the fan blade hub, it is the primary stress point in the drop test, bearing and absorbing the impact energy, thereby effectively protecting the fan blades and other precision components from damage and ensuring the normal operation of the fan. The fan enclosure is composed of multiple sets of disassembled sub-enclosures, with multiple discontinuities, the number of which is determined by the size of the fan; it is encased in metal bending plates to increase stress strength and prevent the plastic outer frame from deforming; the metal sheets in the disassembled sections help to discharge static electricity from the upper and lower metal cover plates; and increase the compressive strength of the upper and lower cover plates. The bushing has a stepped structure on the outside. When it is pressed into the mounting hole of the base, the stepped structure and the wall of the mounting hole form a physical barrier, which can effectively prevent metal debris generated during the pressing process from migrating upwards into the mating area of ​​the bearing and the shaft. This avoids the debris from causing the motor to jam or abnormal wear, and improves the product yield and long-term reliability. Attached Figure Description

[0012] Figure 1 This is an exploded view of the present invention; Figure 2 This is a schematic diagram of the structure of the base and the top cover of this utility model; Figure 3 This is a schematic diagram of the combined structure of the base and the top cover of this utility model; Figure 4 This is a schematic diagram of the structure of the base of this utility model; Figure 5 This is a three-dimensional structural diagram of the base and enclosure of this utility model; Figure 6 This is a schematic diagram of the bushing structure of this utility model; Figure 7 This is a perspective view of the fan blade of this utility model; Figure 8 This is a schematic diagram of the structure of the present invention, in which the shaft protrudes from the end face of the fan blade hub.

[0013] In the diagram: 1. Base; 2. Bushing; 3. Gasket; 4. Bearing; 5. Shaft seal; 6. Stator; 7. Fan blade; 71. Shaft; 8. Top cover; 9. First air outlet; 10. Second air outlet; 11. Enclosure; 12. Airfoil support column. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-8 The present invention provides an embodiment of a dual-outlet cooling fan, comprising a base 1, an upper cover 8 that covers the base, and a housing. After the base 1 and the upper cover 8 are combined, a perimeter wall 11 is formed on its edge. A first air outlet 9 is provided on the perimeter wall 11, and a second air outlet 10 is provided on the side of the housing opposite to the first air outlet 9. The cooling fan also includes a drive assembly and fan blades 7. The drive assembly includes a bushing 2 mounted on the base 1 and a bearing 4 mounted inside the bushing 2. A stator 6 is provided on the outer side of the bushing 2, and a shaft 71 is provided in the middle of the inner side of the fan blades 7. The shaft 71 is inserted into the bearing 4, and the end of the shaft 71 protrudes from the hub end face of the fan blades 7. In the whole machine drop test, the protruding shaft becomes the priority stress point, bearing and absorbing the impact energy, thereby effectively protecting the fan blades and other precision components from damage and ensuring the normal operation of the fan after the drop. A gasket 3 is also provided at the bottom of the inner side of the bushing 2. The gasket 3 is fitted on the shaft 71 and located below the bearing 4. It is used to support the bearing 4 and accurately position the bearing 4 axially, preventing the bearing from axially moving inside the bushing and ensuring the stability and reliability of the motor operation.

[0016] An airfoil-shaped support column 12 is provided at one end of the inner side of the base 1, which helps to improve the aerodynamic flow field; a metal bending plate is provided on the outer side of the base 1 to connect the top cover and the base, and the enclosure 11 is wrapped around the outside of the metal bending plate. By utilizing the higher Young's modulus and strength of the metal material, the bending and torsional mechanical properties of the overall shell are greatly enhanced, effectively preventing the deformation that is easy to occur in the pure plastic shell after injection molding or when subjected to external force.

[0017] The bushing 2 has a stepped structure on the outside. When it is pressed into the mounting hole of the base 1, the stepped structure and the wall of the mounting hole form a physical barrier, which can effectively prevent metal debris (such as copper debris) generated during the pressing process from migrating upward into the mating area of ​​the bearing 4 and the shaft 71. This avoids the debris from causing the motor to jam or wear, and improves the product yield and long-term reliability.

[0018] The top of the bushing 2 is provided with a shaft seal 5, which is adapted to the bushing 2 and together plays the role of sealing and dust prevention.

[0019] Working principle: The cooling fan consists of a base 1, a top cover 8, and a surrounding wall 11 forming a housing; After being powered on, the stator 6 generates a rotating magnetic field, which drives the rotor (i.e. the component combined with the fan blade 7) with permanent magnets to rotate, thereby driving the fan blade 7 to rotate at high speed. Airflow is drawn in from the central area of ​​the fan and accelerated and thrown out radially under the drive of the fan blade 7, and finally discharged through the first air outlet 9 and the second air outlet 10. By setting the first air outlet 9 and the second air outlet 10, a dual air outlet channel is formed, which effectively increases the coverage and efficiency of the heat dissipation airflow.

[0020] The bushing 2 of the cooling fan has a protruding design on the outside. When it is pressed in, copper shavings will be generated between the bushing and the base plate, which can isolate the copper shavings. The protruding shaft 71 at the center of the fan blade 7 is designed to become the primary stress point during the whole machine drop test, bearing and absorbing the impact energy, thereby effectively protecting the fan blade and other precision components from damage and ensuring the normal operation of the fan after the drop.

[0021] The discontinuous sub-wall design helps to discharge static electricity from the upper and lower cover plates; at the same time, the bent metal plate also increases the bonding strength of the upper and lower cover plates, making the assembly more stable.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A dual-outlet cooling fan, comprising a base (1), an upper cover (8) that fits onto the base, and a housing, characterized in that: After the base (1) and the top cover (8) are combined, a wall (11) is formed on its edge. A first air outlet (9) is provided on the wall (11), and a second air outlet (10) is provided on the side of the housing opposite to the first air outlet (9). The cooling fan also includes a drive assembly and a fan blade (7); the drive assembly includes a bushing (2) disposed on the base (1) and a bearing (4) disposed in the bushing (2), a stator (6) is provided on the outer side of the bushing (2), and a shim (3) for axial positioning of the bearing (4) is provided inside the bushing (2), and a shaft (71) is provided in the middle of the inner side of the fan blade (7), the shaft (71) is inserted into the bearing (4), and the end of the shaft (71) protrudes from the hub end face of the fan blade (7).

2. The dual-outlet cooling fan according to claim 1, characterized in that: The base (1) is provided with an airfoil-shaped support column (12).

3. A dual-outlet cooling fan according to claim 1, characterized in that: The base (1) has a metal bending plate on its outer side.

4. A dual-outlet cooling fan according to claim 1, characterized in that: The outer side of the bushing (2) is a stepped structure, and the top of the bushing (2) is provided with a shaft seal (5), which is adapted to the bushing (2).

5. A dual-outlet cooling fan according to claim 3, characterized in that: The wall (11) is made of plastic and is wrapped around the outside of the metal bent plate.

6. A dual-outlet cooling fan according to claim 5, characterized in that: The enclosure (11) is composed of multiple sets of discontinuous sub-enclosures, with gaps formed between adjacent sub-enclosures.

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