Cooling fan and electronic equipment

Abstract

The embodiment of the utility model relates to the technical field of heat dissipation, and particularly discloses a heat dissipation fan and electronic equipment. The shell is provided with a containing cavity, a first air inlet, a second air inlet, a first air outlet and a second air outlet, the first air inlet, the second air inlet, the first air outlet and the second air outlet all communicate with the containing cavity, and the first direction is perpendicular to the second direction; the impeller assembly is arranged in the containing cavity and located between the first air inlet and the second air inlet in the first direction, the impeller assembly is located between the first air outlet and the second air outlet in the second direction, and the impeller assembly is used for driving airflow to enter from the first air inlet and the second air inlet and then output from the first air outlet and the second air outlet. By means of the mode, double air inlets and double air outlets can be formed, the heat dissipation mode that the impeller assembly drives airflow to be output from the double air outlets can be formed, the heat exchange area is increased, the airflow speed is increased, and therefore the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of heat dissipation, and in particular to a heat dissipation fan and electronic equipment. Background Art

[0002] With the diversified development of demand for electronic consumer products, in recent years, miniaturized hosts have been favored in the electronic consumer product market due to their small size, light weight, rich interfaces and high performance release capabilities. One of the core components of miniaturized hosts is the cooling fan, and the quality of the cooling fan directly affects the performance release capability of the miniaturized host.

[0003] During the implementation of the embodiments of the utility model, the inventor discovered that: currently, the cooling fan used in the miniaturized host is a cooling fan with single-sided air outlet. Due to the limitation of the single-sided air outlet, the cooling fan can only be equipped with single-sided cooling fins, resulting in limited heat exchange area of ​​the cooling fan and low heat dissipation efficiency of the cooling fan. Utility Model Content

[0004] The main technical problem solved by the embodiments of the utility model is to provide a heat dissipation fan and an electronic device, which can improve the heat dissipation efficiency.

[0005] To solve the above technical problems, a technical solution adopted in an embodiment of the utility model is: a cooling fan is provided, including a shell and an impeller assembly; the shell is provided with a receiving chamber, a first air inlet, a second air inlet, a first air outlet and a second air outlet, the first air inlet, the second air inlet, the first air outlet and the second air outlet are all connected with the receiving chamber, the direction from the first air inlet to the second air inlet is a first direction, the direction from the first air outlet to the second air outlet is a second direction, and the first direction is perpendicular to the second direction; the impeller assembly is provided in the receiving chamber, along the first direction, the impeller assembly is located between the first air inlet and the second air inlet, along the second direction, the impeller assembly is located between the first air outlet and the second air outlet, and the impeller assembly is used to drive the airflow to enter from the first air inlet and the second air inlet, and then output from the first air outlet and the second air outlet.

[0006] Optionally, the impeller assembly includes an impeller shaft and a plurality of blades, one end of the plurality of blades is fixed to a side wall of the impeller shaft, and the plurality of blades are spaced apart along the circumference of the impeller shaft.

[0007] Optionally, the other end of the blade is arranged in an arc shape; and the distance between any two adjacent blades gradually increases in the direction from one end of the blade to the other end.

[0008] Optionally, the receiving chamber includes a first compression area and a first release area located between the impeller assembly and the first air outlet, the volume of the first compression area is smaller than the volume of the first release area, and the first compression area, the first release area and the first air outlet are connected in sequence to form a first air duct.

[0009] Optionally, the receiving chamber also includes a second compression area and a second release area located between the impeller assembly and the second air outlet, the volume of the second compression area is smaller than the volume of the second release area, and the second compression area, the second release area and the second air outlet are connected in sequence to form a second air duct.

[0010] Optionally, the shell includes a first baffle, a second baffle, a third baffle and a fourth baffle connected end to end in sequence, and the first baffle, the second baffle, the third baffle and the fourth baffle together enclose the receiving cavity, the first air outlet and the second air outlet, the first air inlet is formed on the first baffle, and the second air inlet is formed on the third baffle.

[0011] Optionally, the second baffle includes a first curved plate body and a first straight plate body connected along the second direction, the first straight plate body is closer to the first air outlet than the first curved plate body, and the first curved plate body is concave toward the receiving cavity to form a first convex portion located in the second air duct; the first convex portion, the first curved plate body, the first baffle, the third baffle and the side wall of the impeller assembly together form the first compression area; the first straight plate body, the first baffle, the third baffle and the side wall of the impeller assembly together form the first release area.

[0012] Optionally, the fourth baffle includes a second curved plate body and a second straight plate body connected along a second direction, the second straight plate body is closer to the second air outlet than the second curved plate body, and the second curved plate body is concave toward the receiving cavity to form a second convex portion located in the first air duct; the second convex portion, the second curved plate body, the first baffle, the third baffle and the side wall of the impeller assembly together form the second compression area; the second straight plate body, the first baffle, the third baffle and the side wall of the impeller assembly together form the second release area.

[0013] Optionally, the first arc-shaped plate body is concave toward the receiving cavity to form a first recess, and the first recess is provided with a first fixing portion, and the first fixing portion is used for allowing a fastener to pass through to fix the shell; and / or, the second arc-shaped plate body is concave toward the receiving cavity to form a second recess, and the second recess is provided with a second fixing portion, and the second fixing portion is used for allowing a fastener to pass through to fix the shell.

[0014] In order to solve the above technical problem, another technical solution adopted by the embodiment of the utility model is: to provide an electronic device, including the above-mentioned heat dissipation fan.

[0015] The beneficial effects of the embodiment of the utility model are as follows: Different from the prior art, the embodiment of the utility model provides a heat dissipation fan, including a housing and an impeller assembly; the housing is provided with a receiving chamber, a first air inlet, a second air inlet, a first air outlet and a second air outlet, the first air inlet, the second air inlet, the first air outlet and the second air outlet are all connected with the receiving chamber, the direction from the first air inlet to the second air inlet is the first direction, the direction from the first air outlet to the second air outlet is the second direction, and the first direction is perpendicular to the second direction; the impeller assembly is arranged in the receiving chamber, along the first direction, the impeller assembly is located between the first air inlet and the second air inlet, along the second direction, the impeller assembly is located between the first air outlet and the second air outlet, and the impeller assembly is used to drive the airflow to enter from the first air inlet and the second air inlet, and then output from the first air outlet and the second air outlet. Through the above method, the embodiment of the utility model can form a heat dissipation mode in which double air inlets and double air outlets are formed, and the impeller assembly drives the airflow to output from the double air outlets, thereby increasing the heat exchange area and airflow velocity, thereby improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 The overall structure of the cooling fan provided by the embodiment of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 2 The overall structure of the cooling fan provided by the embodiment of the utility model is shown in FIG. Figure 2 ;

[0019] Figure 3 It is a partial structural schematic diagram of a heat dissipation fan provided by an embodiment of the utility model;

[0020] Figure 4 It is a structural schematic diagram of an impeller assembly of a heat dissipation fan provided by an embodiment of the utility model;

[0021] Figure 5 This is an exploded view of the overall structure of the heat dissipation fan provided by the embodiment of the utility model;

[0022] Figure 6 This is a cross-sectional view of the heat dissipation fan provided by the embodiment of the utility model Figure 1 ;

[0023] Figure 7 This is a cross-sectional view of the heat dissipation fan provided by the embodiment of the utility model Figure 2 .

[0024] Description of reference numerals:

[0025] 1 housing, 11 receiving cavity, 111 first compression area, 112 first release area, 113 second compression area, 114 second release area, 12 first air inlet, 13 second air inlet, 14 first air outlet, 15 second air outlet, 16 first baffle, 17 second baffle, 171 first arc-shaped plate, 1711 first convex part, 1712 first concave part, 1713 first fixing part, 172 first straight plate, 1721 third fixing part, 18 third baffle, 19 fourth baffle, 191 second arc-shaped plate, 1911 second convex part, 1912 second concave part, 1913 second fixing part, 192 second straight plate, 1921 fourth fixing part, 2 impeller assembly, 21 impeller shaft, 22 blades, 23 spacing, 3 first air duct, 4 second air duct;

[0026] X is the first direction, Y is the second direction. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0029] See also Figures 1 to 3 A cooling fan comprises a shell 1 and an impeller assembly 2, the shell 1 is provided with a receiving chamber 11, a first air inlet 12, a second air inlet 13, a first air outlet 14 and a second air outlet 15, the first air inlet 12, the second air inlet 13, the first air outlet 14 and the second air outlet 15 are all connected with the receiving chamber 11, the direction from the first air inlet 12 to the second air inlet 13 is a first direction X, the direction from the first air outlet 14 to the second air outlet 15 is a second direction Y, the first direction X is perpendicular to the second direction Y, the impeller assembly 2 is arranged in the receiving chamber 11, along the first direction X, the impeller assembly 2 is located between the first air inlet 12 and the second air inlet 13, along the second direction Y, the impeller assembly 2 is located between the first air outlet 14 and the second air outlet 15, the impeller assembly 2 is used to drive the airflow to enter from the first air inlet 12 and the second air inlet 13, and then output from the first air outlet 14 and the second air outlet 15. Through the above method, a double air inlet and a double air outlet can be formed, and the impeller assembly 2 drives the airflow to be output from the double air outlets for heat dissipation, thereby increasing the heat exchange area and the airflow speed, thereby improving the heat dissipation efficiency.

[0030] For the above cooling fans, see Figures 1 to 3 In some embodiments, the first air inlet 12 is a through hole, and the area of ​​the first air inlet 12 is greater than or equal to one-half of the cross-sectional area of ​​the impeller assembly 2 along the axial direction. The second air inlet 13 is a plurality of through holes arranged in an annular interval, and the total area of ​​the plurality of through holes is greater than or equal to one-half of the cross-sectional area of ​​the impeller assembly 2 along the axial direction. The first air outlet 14 and the second air outlet 15 are both through holes, and the areas of the first air outlet 14 and the second air outlet 15 are equal. By setting the air inlet and outlet as through holes, the air intake volume of the first air inlet 12 and the second air inlet 13, as well as the air outlet volume of the first air outlet 14 and the second air outlet 15 can be increased, thereby increasing the airflow exchange volume between the cooling fan and the external environment, thereby improving the cooling efficiency of the cooling fan. In addition, compared with designs in which the air inlet and outlet are in other forms (for example, the air inlet and outlet are slit-type or a plurality of through holes), by setting the air inlet and outlet as through holes, the resistance of the airflow in and out can be reduced, so that the airflow can pass through the cooling fan more easily, which helps to improve the cooling efficiency of the cooling fan.

[0031] For the above impeller assembly 2, see Figure 3 and Figure 4 The impeller assembly 2 includes an impeller shaft 21 and a plurality of blades 22. One end of the plurality of blades 22 is fixed to the side wall of the impeller shaft 21, and the plurality of blades 22 are arranged at intervals along the circumference of the impeller shaft 21. The plurality of blades 22 are arranged at intervals, so that the airflow can be effectively guided and accelerated when passing through the impeller assembly 2, thereby improving the efficiency of the airflow output, thereby improving the heat dissipation efficiency of the heat dissipation fan.

[0032] For the above impeller assembly 2, see Figure 3 and Figure 4 The other end of the blade 22 is arranged in an arc shape, and the distance 23 between any two adjacent blades 22 gradually increases from one end of the blade 22 to the other end. By the arc-shaped arrangement of the blades 22 and the gradual increase in the distance 23 between any two adjacent blades 22, the turbulence and resistance of the airflow when passing through the impeller assembly 2 can be reduced, which plays a role in reducing vibration and noise, thereby reducing the noise of the cooling fan.

[0033] To improve the cooling efficiency of the cooling fan, refer to Figures 5 to 7 The receiving chamber 11 includes a first compression area and a first release area located between the impeller assembly 2 and the first air outlet 14. The volume of the first compression area 111 is smaller than the volume of the first release area 112. The first compression area 111, the first release area 112 and the first air outlet 14 are connected in sequence to form a first air duct 3. In addition, the receiving chamber 11 also includes a second compression area 113 and a second release area 114 located between the impeller assembly 2 and the second air outlet 15. The volume of the second compression area is smaller than the volume of the second release area 114. The second compression area 113, the second release area 114 and the second air outlet 15 are connected in sequence to form a second air duct 4. Through the above-mentioned setting of the first compression area 111 and the second compression area 113, the airflow can be squeezed in the first compression area 111 and the second compression area 113, thereby increasing the speed of the airflow and forming two high-speed airflow flow paths, so that the heat inside the heat dissipation fan can be more effectively taken away, and the heat dissipation efficiency of the heat dissipation fan is improved.

[0034] For the above case 1, see Figures 5 to 7 The housing 1 includes a first baffle 16, a second baffle 17, a third baffle 18 and a fourth baffle 19 which are connected end to end in sequence. The first baffle 16, the second baffle 17, the third baffle 18 and the fourth baffle 19 together enclose a receiving cavity 11, a first air outlet 14 and a second air outlet 15. The first air inlet 12 is formed on the first baffle 16, and the second air inlet 13 is formed on the third baffle 18. The first baffle 16, the second baffle 17, the third baffle 18 and the fourth baffle 19 are all vertically connected. In the above manner, the housing 1 can have strong compression and bending resistance, thereby helping to improve the structural stability of the housing 1.

[0035] For the second baffle 17, see Figures 5 to 7The second baffle 17 includes a first arc-shaped plate body 171 and a first straight plate body 172 connected along the second direction Y. The first straight plate body 172 is closer to the first air outlet 14 than the first arc-shaped plate body 171. The first arc-shaped plate body 171 is concave toward the accommodating cavity 11 to form a first convex portion 1711 located in the second air duct 4. The first convex portion 1711, the first arc-shaped plate body 171, the first baffle 16, the third baffle 18 and the side wall of the impeller assembly 2 together enclose a first compression area 111. The first straight plate body 172, the first baffle 16, the third baffle 18 and the side wall of the impeller assembly 2 together enclose a first release area 112.

[0036] For the fourth baffle 19, see Figures 5 to 7 The fourth baffle 19 includes a second arc-shaped plate body 191 and a second straight plate body 192 connected along the second direction Y. The second straight plate body 192 is closer to the second air outlet 15 than the second arc-shaped plate body 191. The second arc-shaped plate body 191 is concave toward the accommodating cavity 11 to form a second convex portion 1911 located in the first air duct 3. The second convex portion 1911, the second arc-shaped plate body 191, the first baffle 16, the third baffle 18 and the side wall of the impeller assembly 2 together form a second compression area 113. The second straight plate body 192, the first baffle 16, the third baffle 18 and the side wall of the impeller assembly 2 together form a second release area 114.

[0037] For the second baffle 17 and the fourth baffle 19, see Figures 5 to 7 The first arc-shaped plate 171 is concave toward the receiving cavity 11 to form a first concave portion 1712, and the first concave portion 1712 is provided with a first fixing portion 1713, and the first fixing portion 1713 is used for a fastener to pass through to fix the housing 1, and / or the second arc-shaped plate 191 is concave toward the receiving cavity 11 to form a second concave portion 1912, and the second concave portion 1912 is provided with a second fixing portion 1913, and the second fixing portion 1913 is used for a fastener to pass through to fix the housing 1. In the above manner, the position of the housing 1 for connection and fixing can be increased, which helps to increase the connection stability of the heat dissipation fan.

[0038] It is understood that in order to further increase the stability of the cooling fan connection, please refer to Figure 7 In some other embodiments, the first straight plate body 172 protrudes away from the receiving cavity 11 to form a third fixing portion 1721, and the second straight plate body 192 protrudes away from the receiving cavity 11 to form a fourth fixing portion 1921. The third fixing portion 1721 and the fourth fixing portion 1921 are both used for fasteners to pass through to fix the shell 1.

[0039] It can also be understood that, in order to increase the stability of the connection, the first fixing portion 1713, the second fixing portion 1913, the third fixing portion 1721 and the fourth fixing portion 1921 are all configured to cooperate with the fastener in a threaded connection manner.

[0040] The embodiment of the utility model provides a heat dissipation fan, including a shell 1 and an impeller assembly 2; the shell 1 is provided with a receiving chamber 11, a first air inlet 12, a second air inlet 13, a first air outlet 14 and a second air outlet 15, the first air inlet 12, the second air inlet 13, the first air outlet 14 and the second air outlet 15 are all connected with the receiving chamber 11, the direction from the first air inlet 12 to the second air inlet 13 is a first direction X, the direction from the first air outlet 14 to the second air outlet 15 is a second direction Y, and the first direction X is perpendicular to the second direction Y; the impeller assembly 2 is arranged in the receiving chamber 11, along the first direction X, the impeller assembly 2 is located between the first air inlet 12 and the second air inlet 13, along the second direction Y, the impeller assembly 2 is located between the first air outlet 14 and the second air outlet 15, the impeller assembly 2 is used to drive the airflow to enter from the first air inlet 12 and the second air inlet 13, and then output from the first air outlet 14 and the second air outlet 15. Through the above method, the embodiment of the utility model can form a double air inlet and a double air outlet, and the impeller assembly 2 drives the airflow to be output from the double air outlets for heat dissipation, thereby increasing the heat exchange area and air flow speed, thereby improving the heat dissipation efficiency.

[0041] The utility model also provides an embodiment of an electronic device, the electronic device includes the above-mentioned cooling fan, the specific structure and function of the above-mentioned cooling fan can be referred to the above-mentioned embodiment, and will not be repeated here. It can be understood that the above-mentioned electronic device includes but is not limited to a host, a router, a projector or a camera, etc.

[0042] For the above electronic device, in some embodiments, it includes a shell, an electronic device body and the above cooling fan, the shell is provided with a first surface, a second surface, a third surface, a fourth surface, a fifth surface and a sixth surface, wherein the first surface, the second surface, the third surface and the fourth surface are vertically connected end to end in sequence, the fifth surface is vertically connected to one side of the first surface, the second surface, the third surface and the fourth surface, the sixth surface is vertically connected to the other side of the first surface, the second surface, the third surface and the fourth surface, the first surface is provided with a first air inlet hole, the second surface is provided with a first air outlet hole, the third surface is provided with a second air inlet hole, and the fourth surface is provided with a second air outlet hole, The fifth surface is provided with a first interface, the sixth surface is provided with a second interface, the electronic device body is arranged in the housing, the first interface and the second interface are both electrically connected to the electronic device body, the cooling fan is arranged in the housing, the first air inlet 12 of the cooling fan is correspondingly connected to the first air inlet, the second air inlet 13 of the cooling fan is correspondingly connected to the second air inlet, the first air outlet 14 of the cooling fan is correspondingly connected to the first air outlet, and the first air outlet 14 is staggered with the first interface, the second air outlet 15 of the cooling fan is correspondingly connected to the second air outlet, and the second air outlet 15 is staggered with the second interface, and the cooling fan is used to drive the heat generated by the operation of the electronic device body to follow the air flow out of the housing. By staggering the air inlet and outlet of the cooling fan and the interface of the electronic device, not only can the connection wires of the interface be prevented from blocking the air inlet and outlet of the cooling fan, but also the connection wires of the interface can be prevented from being in a hot air environment for a long time, thereby reducing the shortening of the life of the connection wires and reducing the impact on the connection stability of the connection wires. In addition, staggering the air inlet and outlet of the cooling fan with the interface of the electronic device can also help reduce the size of the electronic device, thereby helping to reduce the thickness of the electronic device, thereby contributing to the miniaturization or thinness of the electronic device.

[0043] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cooling fan, characterized in that: include: The housing is provided with a receiving cavity, a first air inlet, a second air inlet, a first air outlet, and a second air outlet, wherein the first air inlet, the second air inlet, the first air outlet, and the second air outlet are all connected to the receiving cavity, the direction from the first air inlet to the second air inlet is a first direction, the direction from the first air outlet to the second air outlet is a second direction, and the first direction is perpendicular to the second direction; An impeller assembly is disposed in the accommodating cavity. Along the first direction, the impeller assembly is located between the first air inlet and the second air inlet. Along the second direction, the impeller assembly is located between the first air outlet and the second air outlet. The impeller assembly is used to drive the airflow to enter from the first air inlet and the second air inlet, and then output from the first air outlet and the second air outlet.

2. The heat dissipation fan according to claim 1, characterized in that: The impeller assembly includes an impeller shaft and a plurality of blades. One end of the plurality of blades is fixed to a side wall of the impeller shaft, and the plurality of blades are arranged at intervals along a circumferential direction of the impeller shaft.

3. The heat dissipation fan according to claim 2, characterized in that: The other end of the blade is arranged in an arc shape; Along the direction from one end of the blade to the other end, the distance between any two adjacent blades gradually increases.

4. The heat dissipation fan according to claim 1, characterized in that: The receiving chamber includes a first compression area and a first release area located between the impeller assembly and the first air outlet, the volume of the first compression area is smaller than the volume of the first release area, and the first compression area, the first release area and the first air outlet are connected in sequence to form a first air duct.

5. The heat dissipation fan according to claim 4, characterized in that: The receiving chamber also includes a second compression area and a second release area located between the impeller assembly and the second air outlet, the volume of the second compression area is smaller than the volume of the second release area, and the second compression area, the second release area and the second air outlet are connected in sequence to form a second air duct.

6. The heat dissipation fan according to claim 5, characterized in that: The shell includes a first baffle, a second baffle, a third baffle and a fourth baffle connected end to end in sequence, the first baffle, the second baffle, the third baffle and the fourth baffle together form the receiving cavity, the first air outlet and the second air outlet, the first air inlet is formed on the first baffle, and the second air inlet is formed on the third baffle.

7. The heat dissipation fan according to claim 6, characterized in that: The second baffle comprises a first curved plate body and a first straight plate body connected along the second direction, the first straight plate body is closer to the first air outlet than the first curved plate body, and the first curved plate body is concave toward the receiving cavity to form a first convex portion located in the second air duct; The first convex portion, the first arc-shaped plate body, the first baffle plate, the third baffle plate and the side wall of the impeller assembly together enclose the first compression area; The first straight plate body, the first baffle plate, the third baffle plate and the side wall of the impeller assembly together enclose the first release area.

8. The heat dissipation fan according to claim 7, characterized in that: The fourth baffle comprises a second curved plate body and a second straight plate body connected along a second direction, the second straight plate body is closer to the second air outlet than the second curved plate body, and the second curved plate body is concave toward the receiving cavity to form a second convex portion located in the first air duct; The second convex portion, the second arc-shaped plate body, the first baffle plate, the third baffle plate and the side wall of the impeller assembly together enclose the second compression area; The second straight plate body, the first baffle plate, the third baffle plate and the side wall of the impeller assembly together enclose and form the second release area.

9. The heat dissipation fan according to claim 8, characterized in that: The first arc-shaped plate body is concave toward the receiving cavity to form a first concave portion, the first concave portion is provided with a first fixing portion, and the first fixing portion is used for a fastener to pass through to fix the housing; and / or, The second arc-shaped plate body is concave toward the receiving cavity to form a second recessed portion, and the second recessed portion is provided with a second fixing portion, and the second fixing portion is used for a fastener to pass through to fix the housing.

10. An electronic device, characterized in that: It comprises a cooling fan as described in any one of claims 1 to 9.

Images