CN214125819U

CN214125819U - Electronic device

Info

Publication number: CN214125819U
Application number: CN202022891931.9U
Authority: CN
Inventors: 刘俊达
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-09-03
Anticipated expiration: 2030-12-03

Abstract

The present application relates to an electronic device. The problem that the equipment size is big, the radiating effect is poor is caused to present fan setting mode is aimed at solving. To this end, the electronic device of the present application includes: the shell is provided with a top wall, an accommodating space and an air inlet area; the main board is positioned in the accommodating space, and the surface of the main board is provided with a heat dissipation assembly which comprises a heat dissipation bottom plate and a heat dissipation structure arranged on one side of the heat dissipation bottom plate; the fan comprises an inner shell, a driving part and an impeller assembly arranged in the inner shell, wherein the driving part is connected to the top wall of the outer shell, and the impeller assembly is positioned between the driving part and the heat dissipation bottom plate; the inner shell is provided with an upper wall, a lower wall and a side wall which are back to back, the upper wall is provided with an air inlet communicated with the air inlet area on the periphery side of the driving part, and an air outlet is formed on one side of the side wall close to the heat dissipation structure. The heating part of mainboard is kept away from to this application drive division, avoids the heat source, can not appear because of the overheated condition that leads to the reduction of drive division life-span of mainboard.

Description

Electronic device

Technical Field

The present application relates to an electronic device.

Background

With the progress of technology, some consumer electronic devices with high power consumption and high calorific value have a trend of compact design, such as portable notebook computers, micro personal computers, independent graphics processors, 5G gateways, competitive gateways, and the like. Due to the limitation of the water cooling system on the space requirement, air cooling consisting of the fan and the radiating fins is still the preferred scheme for radiating most electronic products, wherein the fan is mainly divided into an axial flow fan, a centrifugal fan, a combined fan and the like.

In order to prolong the service life of the fan and ensure the working stability, the motor can be kept away from a heat source so as to ensure that the electric core of the motor is at a lower temperature. Therefore, an off-board scheme is usually adopted, i.e., the fan is disposed beside the main board, i.e., the motor is disposed beside the main board, so that the motor can avoid the heat source. However, when the arrangement mode is adopted, the size of the electronic equipment is large, the air outlet cannot be close to a heat source, and the heat dissipation effect is poor.

Accordingly, there is a need in the art for a new electronic device that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides electronic equipment to at least solve the problem that the existing fan setting mode causes the equipment size to be big, the radiating effect is poor.

In one aspect, an embodiment of the present application provides an electronic device, which includes: the air conditioner comprises a shell, a fan and a fan, wherein the shell is provided with a top wall, an accommodating space and an air inlet area communicated with the accommodating space;

the mainboard is positioned in the accommodating space, a heat dissipation assembly is arranged on the surface of the mainboard, and the heat dissipation assembly comprises a heat dissipation bottom plate at least partially covering the mainboard and a heat dissipation structure arranged on one side of the heat dissipation bottom plate;

the fan is positioned between the top wall of the outer shell and the heat dissipation bottom plate and comprises an inner shell, a driving part and an impeller assembly arranged in the inner shell, the driving part is connected to the top wall of the outer shell, and the impeller assembly is positioned between the driving part and the heat dissipation bottom plate and is driven by the driving part;

the inner shell is provided with an upper wall, a lower wall and a side wall, wherein the upper wall and the lower wall are opposite to each other, the driving part extends into the inner shell through the upper wall, an air inlet communicated with the air inlet area is formed in the periphery of the driving part, and an air outlet is formed in one side, close to the heat dissipation structure, of the side wall.

According to an aspect of the embodiment of the present application, the impeller assembly includes an axial-flow impeller and a centrifugal impeller which are connected, the axial-flow impeller is connected to the driving part, and the driving part drives the axial-flow impeller and the centrifugal impeller to rotate together at the same rotation speed; the upper wall forms the air inlet in the axial direction of the axial flow impeller, and the side wall forms the air outlet on one side of the centrifugal impeller close to the heat dissipation structure.

According to an aspect of the embodiment of the present application, the axial flow impeller includes a first hub and an axial flow fan blade, the first hub includes a body and a first cover plate, the body is cylindrical, the first cover plate is disposed at one end of the body in a covering manner, the first cover plate has a first surface and a second surface that are opposite to each other in a thickness direction, the first surface is a surface of the first cover plate facing the inside of the body, the first surface is provided with a driving connection portion connected to the driving portion, and the second surface is provided with a clamping portion; the centrifugal impeller comprises a second hub and centrifugal fan blades, the second hub comprises a base body and a second cover plate, the base body comprises a cylindrical structure, the second cover plate is arranged at one end of the cylindrical structure in a covering mode, and a clamping matching portion is arranged on one side, far away from the inside of the cylindrical structure, of the second cover plate; the first cover plate and the second cover plate are mutually abutted through the clamping part and the clamping matching part.

According to an aspect of the embodiment of the present application, the engaging portion includes at least one first ridge and at least one first groove, and the engaging portion includes at least one corresponding second groove and at least one corresponding second ridge, the second groove is engaged with the first ridge, and the second ridge is engaged with the first groove.

According to an aspect of the embodiment of the present application, the base further includes a limiting ring extending along a wall surface of the cylindrical structure at the second cover plate, and the body abuts against an inner wall of the limiting ring.

According to an aspect of the embodiment of the present application, the fan includes a limiting assembly, the limiting assembly is located between one side of the second cover plate facing the inside of the cylindrical structure and the inner shell, and the centrifugal impeller is abutted to the axial-flow impeller through the limiting assembly;

the limiting assembly comprises an elastic telescopic piece and a thimble, the elastic telescopic piece is provided with two opposite ends, and one end of the elastic telescopic piece is abutted against the second cover plate; the thimble comprises a straight rod and a tip arranged at one end of the straight rod, wherein a protrusion is arranged on the outer wall of the straight rod and is positioned at the position, close to the tip, of the straight rod; the elastic telescopic piece is sleeved on the straight rod, and the other end of the elastic telescopic piece is abutted against the bulge; the lower wall is provided with a rotary matching part, the tip is abutted to the rotary matching part and can rotate in the rotary matching part, and the centrifugal impeller is abutted to the axial flow impeller under the matching action of the lower wall and the limiting assembly.

According to an aspect of the embodiment of the application, a side of the second cover plate facing the inside of the cylindrical structure is provided with a limiting part, the elastic expansion piece is at least partially located in the limiting part, and the limiting part is used for limiting displacement of the limiting component along the radial direction of the centrifugal fan in the rotating process.

According to an aspect of the embodiment of the present application, the housing includes a cover and a case connected to each other, and the driving portion is disposed on the cover; the shell comprises a top part, a bottom part and a containing part, and the main board and the heat dissipation part are positioned in the containing part; the cover body is positioned on one side of the top part far away from the accommodating part, the cover body is connected to the top part, and the air inlet area is formed between the cover body and the top part; the top portion has a concave area, the concave area has an opening, the fan extends from the cover body into the accommodating portion through the opening, and the air inlet of the fan is located between the cover body and the top portion.

According to an aspect of the embodiment of the present application, the top portion includes a first platform, a ramp and a second platform, which are connected in sequence, the ramp and the second platform form the recessed area, the second platform is provided with the opening, the first platform, the ramp and the second platform form a bottom of the air inlet area, and the cover body forms a top of the air inlet area; in the air inlet area, a first baffle extending along the wind shielding direction is arranged on the inclined surface of the sloping platform, and the first baffle is arranged along the circumferential direction of the sloping platform; a second baffle plate extending along the wind shielding direction is arranged on one side, close to the top, of the cover body, the second baffle plate is located between the first baffle plate and the fan, and the second baffle plate is arranged along the circumferential direction of the fan and surrounds the driving portion and the air inlet; in the circulation direction of air, first baffle, the second baffle the sloping platform the second platform and the inner shell encloses to establish and forms S type air duct, first baffle with be S type air duct 'S the upper half between the second baffle, the sloping platform the second platform with the lateral wall forms S type air duct' S the latter half.

According to an aspect of the embodiment of the application, one side of the cover body close to the top is provided with an annular baffle plate, the annular baffle plate is located in a space formed by the second baffle plate in a surrounding mode, and the annular baffle plate extends to the impeller assembly and forms a closed space containing the driving portion together with the impeller assembly.

According to an aspect of the embodiment of the application, mainboard fixedly connected with antenna boom, the last radio frequency antenna that is provided with of antenna boom, heat radiation structure is located antenna boom encloses the space of establishing.

The electronic equipment that this application embodiment provided includes shell, mainboard and fan, and the fan includes inner shell, drive division and arranges the impeller subassembly in the inner shell in, and the drive division sets up in the roof of shell, inverts promptly in accommodation space, and like this, the drive division is kept away from the part that generates heat of mainboard, avoids the heat source, can not appear because of the overheated condition that leads to the life-span reduction of drive division of mainboard. And the fan is arranged between the top wall of the shell and the heat dissipation bottom plate, and the air outlet of the fan directly blows to the heat dissipation structure, so that the heat dissipation effect is excellent. Except this, the fan is in the position in the middle of the top of mainboard is comparatively, saves space for the side, and the integrated level is high, can not increase substantially electronic equipment's size, can not cause the structure to pile up yet, can not cause the restriction to the overall arrangement of mainboard even more.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present application will be described below by referring to the accompanying drawings.

Fig. 1 is a schematic cross-sectional structure diagram of an electronic device according to an embodiment of the present application;

FIG. 2 is an enlarged schematic view of the electronic device shown in FIG. 1 at block A;

FIG. 3 is another enlarged schematic view of the electronic device shown in FIG. 1 at block A;

FIG. 4 is an enlarged schematic view at B in FIG. 3;

FIG. 5 is a schematic diagram of a configuration of an impeller assembly of the electronic device of FIG. 1;

FIG. 6 is a schematic view of a axial flow impeller of the impeller assembly of FIG. 5;

FIG. 7 is a schematic structural view of a centrifugal impeller in the impeller assembly of FIG. 5;

FIG. 8 is a schematic structural view of a cover and a ring-shaped bezel of the electronic device of FIG. 1;

fig. 9 is a schematic structural diagram of the housing and the first shutter in the electronic device shown in fig. 1.

Reference numerals:

1. a housing; 11. a cover body; 12. a housing; 121. a top portion; 1211. a first platform; 1212. a sloping table; 1213. a second platform; 122. a bottom; 123. an accommodating portion; 13. an air inlet area; 14. a first baffle plate; 15. a second baffle; 16. an annular baffle;

2. a main board; 21. a connecting seat;

3. a fan; 31. an inner shell; 311. an upper wall; 3111. an air inlet; 312. a lower wall; 3121. a rotation fitting part; 313. a side wall; 3131. an air outlet; 32. a drive section; 321. an electric wire; 322. wiring; 33. an impeller assembly; 331. an axial flow impeller; 3310. a first groove; 3311. a first hub; 3312. axial flow fan blades; 3313. a body; 3314. a first cover plate; 3315. a first surface; 3316. a second surface; 3317. a drive connection portion; 3318. a fastening part; 3319. a first ridge; 332. a centrifugal impeller; 3320. centrifuging the fan blades; 3321. a second hub; 3322. a substrate; 3323. a second cover plate; 3324. a tubular structure; 3325. a snap-fit portion; 3326. a second groove; 3327. a second ridge; 3328. a limiting ring; 3329. a limiting part; 34. a limiting component; 341. an elastic extensible member; 342. a thimble; 3421. a straight rod; 3422. a tip; 3423. a protrusion;

4. a heat dissipating component; 41. a heat dissipation base plate; 42. a heat dissipation structure;

5. an antenna mount;

6. and a seal.

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the described embodiments.

In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The following description is given with the directional terms as they are used in the drawings and not intended to limit the specific structure of the present application. In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.

For a better understanding of the present application, embodiments of the present application are described below with reference to fig. 1 to 8.

Referring to fig. 1 to 3 together, fig. 1 is a schematic cross-sectional structure diagram of an electronic device according to an embodiment of the present disclosure, fig. 2 is an enlarged schematic view of the electronic device shown in fig. 1 at a block a, and fig. 3 is another enlarged schematic view of the electronic device shown in fig. 1 at the block a. The electronic equipment provided by the embodiment of the application comprises a shell 1, a mainboard 2 and a fan 3. The housing 1 has a top wall, a receiving space and an air intake area 13 communicating with the receiving space. The motherboard 2 is located in the accommodating space, the heat dissipation assembly 4 is disposed on the surface of the motherboard 2, and the heat dissipation assembly 4 includes a heat dissipation bottom plate 41 at least partially covering the motherboard 2 and a heat dissipation structure 42 disposed on one side of the heat dissipation bottom plate 41. The fan 3 is located between the top wall of the outer casing 1 and the heat dissipation bottom plate 41, the fan 3 includes an inner casing 31, a driving portion 32 and an impeller assembly 33 disposed in the inner casing 31, the driving portion 32 is connected to the top wall of the outer casing 1, and the impeller assembly 33 is located between the driving portion 32 and the heat dissipation bottom plate 41 and is driven by the driving portion 32. The inner housing 31 has an upper wall 311, a lower wall 312 and a side wall 313 connected to the upper wall 311 and the lower wall 312, the driving portion 32 extends into the inner housing 31 through the upper wall 311, the upper wall 311 is provided with an air inlet 3111 communicating with the air inlet area 13 on the periphery side of the driving portion 32, and an air outlet 3131 is formed on one side of the side wall 313 close to the heat dissipation structure 42. The lower wall 312 is fixedly connected to the heat sink base plate 41.

The electronic device provided by the embodiment of the application comprises an outer shell 1, a main board 2 and a fan 3, wherein the fan 3 comprises an inner shell 31, a driving part 32 and an impeller assembly 33 arranged in the inner shell 31, and the driving part 32 is arranged on the top wall of the outer shell 1, namely, is inverted in a containing space, so that the driving part 32 is far away from a heating part of the main board 2 and avoids a heat source, and the condition that the service life of the driving part 32 is reduced due to overheating of the main board 2 cannot occur. Moreover, the fan 3 is located between the top wall of the housing 1 and the heat dissipating bottom plate 41, and the air outlet 3131 of the fan 3 directly blows towards the heat dissipating structure 42, so that the heat dissipating effect is excellent. And the fan 3 is located in the position of the upper middle of the mainboard 2, so that the space is saved compared with the side, the integration level is high, the size of the electronic equipment cannot be greatly increased, the structure stacking cannot be caused, and the limitation on the layout of the mainboard 2 cannot be caused. In addition, the inner shell 31 and the heat dissipation bottom plate 41 are fixedly connected, and can play a role of grounding.

In some alternative embodiments, the driving portion 32 is a motor, but may be other devices capable of driving the impeller assembly 33 to operate. The electric wire 321 of the motor is connected with the connection wire 322 through the connector, and the connection wire 322 is connected to the connection base 21 of the main board 2. Optionally, the electric wire 321 and the connection wire 322 are connected to the housing 1 by a snap, so that the electric wire 321 and the connection wire 322 do not fall into the air inlet 3111 due to negative pressure when the fan 3 is running.

In some alternative embodiments, the heat dissipating base plate 41 is disposed on the upper surface of the heat generating portion of the motherboard 2, and the heat dissipating structure 42 is disposed on one side of the heat dissipating base plate 41. The heat dissipation structure 42 is a heat dissipation fin, but may be other components capable of dissipating heat.

In some alternative embodiments, the lower wall 312 is screwed to the heat sink base 41, and optionally, an adhesive or the like may be used.

In some alternative embodiments, the upper wall 311 completely forms the intake inlet 3111. Optionally, the upper wall 311 may also partially form the intake port 3111.

In some optional embodiments, the main board 2 is fixedly connected with an antenna bracket 5, a radio frequency antenna is disposed on the antenna bracket 5, and the heat dissipation structure 42 is located in a space enclosed by the antenna bracket 5. The radio frequency antenna is arranged above the mainboard 2, so that the electronic equipment is compatible with the internal and external antennas and does not occupy too much space. And a larger space exists between the antenna support 5 and the heat dissipation structure 42, and the air outlet 3131 utilizes the space to enhance the heat dissipation effect on the heat dissipation structure 42, thereby enhancing the heat dissipation effect.

Referring to fig. 5, 6 and 7 together, fig. 5 is a schematic structural diagram of an impeller assembly in the electronic device shown in fig. 1, fig. 6 is a schematic structural diagram of an axial-flow impeller in the impeller assembly shown in fig. 5, and fig. 7 is a schematic structural diagram of a centrifugal impeller in the impeller assembly shown in fig. 5. The impeller assembly 33 includes an axial impeller 331 and a centrifugal impeller 332 connected to each other, the axial impeller 331 is connected to the driving part 32, and the driving part 32 drives the axial impeller 331 and the centrifugal impeller 332 to rotate together at the same rotational speed. The upper wall 311 forms an air inlet 3111 at the axial impeller 331 for feeding air in the axial direction, and the side wall 313 forms an air outlet 3131 at a side of the centrifugal impeller 332 close to the heat dissipation structure 42.

In some alternative embodiments, the axial flow impeller 331 includes a first hub 3311 and axial flow blades 3312. The first hub 3311 includes a main body 3313 and a first cover plate 3314, the main body 3313 is cylindrical, and the first cover plate 3314 covers one end of the main body 3313. The axial blades 3312 are circumferentially disposed around the body 3313 and fixedly connected to the body 3313. The first cover plate 3314 has a first surface 3315 and a second surface 3316 opposite to each other in the thickness direction, the first surface 3315 is a surface of the first cover plate 3314 facing the inside of the body 3313, the first surface 3315 is fixedly provided with a driving connection portion 3317 connected to the driving portion 32, and the second surface 3316 is provided with a fastening portion 3318. Optionally, the driving connecting portion 3317 and the driving portion 32 are connected by a latch and a slot, that is, the latch is disposed on the rotation shaft of the driving portion 32, and the slot is disposed on the driving connecting portion 3317. In another embodiment, the driving connection portion 3317 and the driving portion 32 may be fixed by interference fit.

Centrifugal impeller 332 includes a second hub 3321 and centrifugal blades 3320. The second hub 3321 includes a base 3322 and a second cover 3323, and the centrifugal fan blades 3320 are fixedly connected to the base 3322. The base 3322 includes a cylindrical structure 3324, a second cover plate 3323 covering one end of the cylindrical structure 3324, and a snap-fit portion 3325 disposed on a side of the second cover plate 3323 away from the inside of the cylindrical structure 3324. When the first cover plate 3314 abuts against the second cover plate 3323, the engaging portion 3318 is engaged with the engaging portion 3325. Optionally, the engaging portion 3318 includes at least one first protrusion 3319 and at least one first groove 3310, the engaging portion 3325 includes at least one corresponding second groove 3326 and at least one corresponding second protrusion 3327, the second groove 3326 is engaged with the first protrusion 3319, and the second protrusion 3327 is engaged with the first groove 3310. Adopt protruding ridge and recess to set up in the mode of one side, when with another side joint cooperation, the degree of agreeing with of two faces is higher, and the firm degree of joint is higher, is favorable to axial flow impeller 331 and centrifugal impeller 332 to transmit the moment of torsion when high-speed rotatory.

In some alternative embodiments, the clamping portion 3318 includes two first ridges 3319 and two first grooves 3310, the two first ridges 3319 and the two first grooves 3310 are both disposed along the radial direction of the first cover plate 3314, and the clamping portion 3325 includes two second grooves 3326 and two second ridges 3327, the corresponding second grooves 3326 and second ridges 3327 are also disposed along the radial direction of the second cover plate 3323.

In other alternative embodiments, the engaging portion 3318 includes a first ridge 3319 or a first groove 3310, and the engaging portion 3325 includes a second groove 3326 or a second ridge 3327.

The axial-flow impeller 331 is arranged in front of the centrifugal impeller 332 in the embodiment of the application, so that the on-way loss of airflow flowing through the air inlet area 13 can be compensated, and the cooling effect is ensured. And axial flow impeller 331 and centrifugal impeller 332 adopt the joint complex mode, are convenient for change and maintain, when customizing to the equipment of different thickness cost greatly reduced, generally only need change axial fan 3 the size promptly can. Meanwhile, the mode of connecting the axial flow impeller 331 and the centrifugal impeller 332 in series is adopted, so that matching can be conveniently carried out according to different requirements, and the gain of the fan 3 is optimal or close to optimal.

In alternative embodiments, the impeller assembly 33 may also be a centrifugal impeller 332.

In other alternative embodiments, the axial flow impeller 331 and the centrifugal impeller 332 may be fixedly connected, i.e., the first cover plate 3314 and the second cover plate 3323 are fixedly connected, for example, by welding or screwing.

In some optional embodiments, the base 3322 further comprises a retaining ring 3328 extending along the wall of the cylindrical structure 3324 at the second cover plate 3323, and the body 3313 abuts against the inner wall of the retaining ring 3328. When the body 3313 is mounted, it abuts against the stopper 3328 to ensure that the axial flow impeller 331 and the centrifugal impeller 332 are completely coaxial, i.e., to perform a centering function.

Referring to fig. 3 and 4, fig. 4 is an enlarged schematic view at B in fig. 3. The fan 3 includes a limiting component 34, the limiting component 34 is located between one side of the second cover plate 3323 facing the inside of the cylindrical structure 3324 and the inner casing 31, and the centrifugal impeller 332 abuts against the axial flow impeller 331 through the limiting component 34. Specifically, the position limiting assembly 34 includes an elastic expansion element 341 and a thimble 342, and the elastic expansion element 341 has two opposite ends, one of which is abutted against the second cover plate 3323. The thimble 342 includes a straight rod 3421 and a tip 3422 fixedly disposed at one end of the straight rod 3421, a protrusion 3423 is fixedly disposed on an outer wall of the straight rod 3421, and the protrusion 3423 is located at a position of the straight rod 3421 close to the tip 3422. Alternatively, the protrusion 3423 is ring-shaped. The elastic expansion member 341 is disposed on the straight rod 3421, and the other end of the elastic expansion member 341 abuts against the protrusion 3423. The minimum length of the elastic expansion member 341 in a compressed state is greater than or equal to the length of the straight rod 3421, so as to ensure that the centrifugal impeller 332 is always under the stress action of the elastic expansion member 341, and thus is tightly attached to the axial flow impeller 331, and the elastic expansion member 341 always provides a buffer action for the axial flow impeller 331 and the centrifugal impeller 332. The lower wall 312 is provided with a rotation fitting portion 3121, and the tip 3422 abuts against the rotation fitting portion 3121 and can rotate therein. Under the cooperation of the lower wall 312 and the position limiting assembly 34, the centrifugal impeller 332 abuts against the axial-flow impeller 331.

By providing the stopper member 34 between the second cover plate 3323 and the inner casing 31, the stopper member 34 firmly abuts the axial-flow impeller 331 and the centrifugal impeller 332 against the driving portion 32, and the axial displacement of the axial-flow impeller 331 and the centrifugal impeller 332 is restricted within a small range. When the device falls, the installation position of the housing 1 has a slight tolerance or otherwise may cause the axial flow impeller 331 and the centrifugal impeller 332 to be dislocated, the elastic expansion member 341 plays a role in buffering and resetting, thereby improving the safety performance of the electronic device.

In some alternative embodiments, the elastic expansion member 341 is a spring. Alternatively, other members capable of elastically stretching and retracting and fitting over the thimble 342 may be used, such as a hollow rubber column.

In some alternative embodiments, tip 3422 is provided with a ball head sized to match the rotational speed of impeller assembly 33. Set up bulb and rotatory cooperation portion 3121 looks adaptation, rotatory resistance that gets up reduces greatly, and then has reduced fan 3's energy consumption, and fan 3 moves more smoothly.

In some optional embodiments, a position-limiting portion 3329 is fixedly disposed on a side of the second cover plate 3323 facing the inside of the cylindrical structure 3324, and the elastic expansion member 341 is at least partially located in the position-limiting portion 3329, i.e., the elastic expansion member 341 may be partially located in the position-limiting portion 3329 or may be entirely located in the position-limiting portion 3329. The position-limiting portion 3329 is used to limit the radial displacement of the position-limiting component 34 along the centrifugal fan 3 during the rotation process, i.e. the elastic expansion piece 341 and the thimble 342 are almost always located at the axial position of the impeller component 33, so as to avoid the shaking during the rotation process. Specifically, the limiting portion 3329 is a straight cylinder structure, and the diameter of the straight cylinder structure is slightly larger than the radial distance of the spring.

In other alternative embodiments, the position limiting assembly 34 may also be only the thimble 342, and the straight rod 3421 abuts against or is fixedly connected to the second cover plate 3323.

Referring to fig. 2, fig. 3, fig. 8 and fig. 9, fig. 8 is a schematic structural diagram of a cover and a ring-shaped baffle in the electronic device shown in fig. 1, and fig. 9 is a schematic structural diagram of a housing and a first baffle in the electronic device shown in fig. 1. The housing 1 includes a cover 11 and a case 12 connected to each other, and the driving portion 32 is provided on the cover 11. The cover 11 and the housing 12 are connected by a combination of a screw connection and a clamping connection, or alternatively, may be connected by a screw connection or a clamping connection. The driving portion 32 is fixedly disposed on the cover 11 in a snap-fit manner, and optionally, a threaded connection manner may also be employed. Optionally, a buffer foam may be disposed between the driving portion 32 and the cover 11 to absorb shock and reduce noise. The cover 11 is a top wall of the housing 1. The housing 12 includes a top 121, a bottom 122, and an accommodating portion 123, and the main board 2 and the heat dissipating part are located in the accommodating portion 123, specifically, at a lower portion of the accommodating portion 123. The cover 11 is located on a side of the top portion 121 away from the receiving portion 123, i.e., above the top portion 121. An air inlet area 13 is formed between the cover body 11 and the top part 121. The top portion 121 has a concave area having an opening, the fan 3 extends from the cover 11 into the receiving portion 123 through the opening, and the inlet 3111 of the fan 3 is located between the cover 11 and the top portion 121. The partial region between the cover 11 and the recessed region and the receiving portion 123 form the receiving space.

Further, the top portion 121 includes a first platform 1211, a ramp 1212, and a second platform 1213 connected in series, the ramp 1212 and the second platform 1213 forming the recessed area. The first platform 1211 and the second platform 1213 are arranged in parallel, and the first platform 1211 is positioned above the second platform 1213. Optionally, the ramp 1212 and the second plateau 1213 form a bowl, and the first plateau 1211 is connected to the outer circumference of the bowl. The first platform 1211, the ramp 1212 and the second platform 1213 are connected in an integral manner. Alternatively, the connection may be made by welding, screwing, or the like. The second platform 1213 is opened with the above opening, the first platform 1211, the inclined platform 1212 and the second platform 1213 form the bottom 122 of the air inlet area 13, and the cover 11 forms the top 121 of the air inlet area 13. The air inlet 3111 is located between the cover 11 and the top 121, and the air flows through the air inlet area 13 and then enters the air inlet 3111. Wherein, the second platform 1213 is located between the top end of the side wall 313 and the upper surface of the air outlet 3131. Optionally, the second platform 1213 is located above the air outlet 3131 and is disposed adjacent to the upper surface of the air outlet 3131, and the axial-flow impeller 331 is located almost entirely between the cover 11 and the second platform 1213. The arrangement mode can make the air inlet area 13 have the largest space, thereby facilitating air inlet.

In the air intake area 13, a first baffle 14 extending in the wind shielding direction is arranged on the inclined surface of the inclined table 1212, and the first baffle 14 is arranged along the circumferential direction of the inclined table 1212. One side of the cover 11 close to the top 121 is provided with a second baffle 15 extending along the wind shielding direction, the second baffle 15 is located between the first baffle 14 and the fan 3, and the second baffle 15 is arranged along the circumferential direction of the fan 3 and surrounds the driving portion 32 and the air inlet 3111. Optionally, the first baffle 14 extends upward from the upper surface of the ramp 1212 in a vertical direction, and has an upper end spaced from the cover 11 for airflow therethrough. The second baffle 15 extends downward from the lower surface of the cover 11 in the vertical direction, and has a lower end facing the second platform 1213 with a space from the second platform 1213 for the passage of the air flow. Optionally, a second baffle 15 may also be positioned above the ramp 1212.

In the air circulation direction, the first baffle 14, the second baffle 15, the inclined platform 1212, the second platform 1213 and the inner casing 31 enclose an S-shaped air passage. Between the first baffle 14 and the second baffle 15 is the upper half of the S-shaped air channel, and the ramp 1212, the second plateau 1213 and the side wall 313 form the lower half of the S-shaped air channel. The air flow passes first between the cover 11 and the first land 1211, then between the first barrier 14 and the second barrier 15, i.e., the upper half of the S-shaped air passage, and then between the side wall 313 and the second barrier 15, and finally enters the intake port 3111. A triangular area is formed between the first baffle plate 14 which is vertically arranged and the inclined platform 1212, and when airflow passes through, most of particle impurities, small insects and rainwater with high density are blocked by the first baffle plate 14 and fall into the triangular area; lighter dust continues to be caught forward by the second baffle 15 and deposited on the second platform 1213, making it difficult to enter the fan 3. Therefore, by arranging the first baffle plate 14 and the second baffle plate 15, most of impurities, dust and water can be blocked without relying on a dust screen, the service life of the fan 3 is prolonged, and the cleaning is also convenient.

In some alternative embodiments, the upper surface of the outlet 3131 is sealed to the second platform 1213 with a seal 6. Specifically, the seal 6 is a sealing rubber. Of course, other components with a sealing effect, such as foam, may also be used. Because a gap is reserved between the second platform 1213 and the side wall 313, the sealing element 6 is used for sealing, so that water and ash are prevented from entering the gap and contacting the mainboard 2, and the damage to the mainboard 2 is prevented.

In alternative embodiments, oil is added between impeller assembly 33 and inner casing 31 to provide a seal and enhance heat dissipation from the motor.

In some alternative embodiments, the cover 11 is provided with an annular baffle 16 on a side close to the top 121, the annular baffle 16 is located in a space surrounded by the second baffle 15, and the annular baffle 16 extends to the impeller assembly 33 and forms a closed space with the impeller assembly 33 for accommodating the driving portion 32. Specifically, the annular baffle 16 extends to the body 3313 of the axial flow impeller 331, and since the body 3313 is cylindrical, the annular baffle 16 can abut against the outer wall of the body 3313 to form a closed space, so as to prevent dust and water in the air flow from entering the driving part 32, and prolong the service life of the driving part 32.

When assembling the cover 11, the driving part 32 is first snapped onto the cover 11, then the wires 321 and the connecting wires 322 are connected and snapped onto the snap of the housing 1, and finally the rotation shaft of the driving part 32 is aligned with the driving connection part 3317 of the axial-flow impeller 331 to complete the installation of the cover 11. The electronic equipment of this application embodiment is when maintaining cleanly, only need pull down lid 11 and break off electric wire 321 and the interface of wiring 322 can, compare traditional dust screen, clean disinfection is more thorough.

While the present application has been described with reference to exemplary embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application, and in particular, features shown in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. An electronic device, comprising:

the air conditioner comprises a shell, a fan and a fan, wherein the shell is provided with a top wall, an accommodating space and an air inlet area communicated with the accommodating space;

2. The electronic device of claim 1, wherein the impeller assembly comprises an axial impeller and a centrifugal impeller connected to each other, the axial impeller being connected to the driving portion, the driving portion driving the axial impeller and the centrifugal impeller to rotate together at a same rotational speed;

the upper wall forms the air inlet in the axial direction of the axial flow impeller, and the side wall forms the air outlet on one side of the centrifugal impeller close to the heat dissipation structure.

3. The electronic device according to claim 2, wherein the axial-flow impeller includes a first hub and an axial-flow fan blade, the first hub includes a body and a first cover plate, the body is cylindrical, the first cover plate is disposed at one end of the body, the first cover plate has a first surface and a second surface that are opposite to each other in a thickness direction, the first surface is a surface of the first cover plate facing an inside of the body, the first surface is provided with a driving connection portion connected to the driving portion, and the second surface is provided with a clamping portion;

the centrifugal impeller comprises a second hub and centrifugal fan blades, the second hub comprises a base body and a second cover plate, the base body comprises a cylindrical structure, the second cover plate is arranged at one end of the cylindrical structure in a covering mode, and a clamping matching portion is arranged on one side, far away from the inside of the cylindrical structure, of the second cover plate;

the first cover plate and the second cover plate are mutually abutted through the clamping part and the clamping matching part.

4. The electronic device of claim 3, wherein the engaging portion comprises at least one first ridge and at least one first groove, and the engaging portion comprises at least one corresponding second groove and at least one corresponding second ridge, the second groove engaging with the first ridge, and the second ridge engaging with the first groove.

5. The electronic device according to claim 3, wherein the fan comprises a limiting component, the limiting component is positioned between one side of the second cover plate facing the inside of the cylindrical structure and the inner shell, and the centrifugal impeller is abutted to the axial-flow impeller through the limiting component;

the limiting assembly comprises an elastic telescopic piece and a thimble, the elastic telescopic piece is provided with two opposite ends, and one end of the elastic telescopic piece is abutted against the second cover plate;

the thimble comprises a straight rod and a tip arranged at one end of the straight rod, wherein a protrusion is arranged on the outer wall of the straight rod and is positioned at the position, close to the tip, of the straight rod; the elastic telescopic piece is sleeved on the straight rod, and the other end of the elastic telescopic piece is abutted against the bulge;

the lower wall is provided with a rotary matching part, the tip is abutted to the rotary matching part and can rotate in the rotary matching part, and the centrifugal impeller is abutted to the axial flow impeller under the matching action of the lower wall and the limiting assembly.

6. The electronic device according to claim 5, wherein a side of the second cover plate facing the inside of the cylindrical structure is provided with a limiting portion, the elastic expansion member is at least partially located in the limiting portion, and the limiting portion is used for limiting displacement of the limiting assembly in a radial direction of the centrifugal fan during rotation.

7. The electronic device of any of claims 1-6,

the shell comprises a cover body and a shell body which are connected, and the driving part is arranged on the cover body; the shell comprises a top part, a bottom part and a containing part, and the main board and the heat dissipation assembly are positioned in the containing part; the cover body is positioned on one side of the top part far away from the accommodating part, the cover body is connected to the top part, and the air inlet area is formed between the cover body and the top part;

the top portion has a concave area, the concave area has an opening, the fan extends from the cover body into the accommodating portion through the opening, and the air inlet of the fan is located between the cover body and the top portion.

8. The electronic device of claim 7, wherein: the top comprises a first platform, an inclined platform and a second platform which are connected in sequence, the inclined platform and the second platform form the concave area, the second platform is provided with the opening, the first platform, the inclined platform and the second platform form the bottom of the air inlet area, and the cover body forms the top of the air inlet area;

in the air inlet area, a first baffle extending along the wind shielding direction is arranged on the inclined surface of the sloping platform, and the first baffle is arranged along the circumferential direction of the sloping platform; a second baffle plate extending along the wind shielding direction is arranged on one side, close to the top, of the cover body, the second baffle plate is located between the first baffle plate and the fan, and the second baffle plate is arranged along the circumferential direction of the fan and surrounds the driving portion and the air inlet;

in the circulation direction of air, first baffle, the second baffle the sloping platform the second platform and the inner shell encloses to establish and forms S type air duct, first baffle with be S type air duct 'S the upper half between the second baffle, the sloping platform the second platform with the lateral wall forms S type air duct' S the latter half.

9. The electronic device of claim 8, wherein: an annular baffle is arranged on one side, close to the top, of the cover body, the annular baffle is located in a space formed by the second baffle in a surrounding mode, and the annular baffle extends to the impeller assembly and forms a closed space containing the driving portion together with the impeller assembly.

10. The electronic device of claim 1, wherein: the mainboard fixedly connected with antenna boom, the last radio frequency antenna that is provided with of antenna boom, heat radiation structure is located the space that antenna boom encloses.