Plate type heat dissipation device

Abstract

The utility model provides a plate type heat dissipation device, relates to the heat dissipation technology field, the heat dissipation device comprises a heat dissipation body and a driving device arranged on the heat dissipation body, a channel is arranged in the heat dissipation body, and the driving device is used for driving fluid to flow in the channel. The driving device is integrated on the heat dissipation body, when the driving device rotates, fluid in the driving device can be driven to flow in the channel, the flowing fluid can take away heat generated by the electronic component and dissipate the heat, and the heat dissipation requirement of the electronic product is met.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation, in particular to a plate-type heat dissipation device. Background Art

[0002] Electronic products, such as smartphones, tablets, and laptops, are widely popular because of their small size and light weight. High-power electronic components of electronic products, such as central processing units (CPUs), graphics processing units (GPUs), and batteries, generate a lot of heat when they are working. If the heat cannot be dissipated in a timely and effective manner, the electronic products may overheat, resulting in performance degradation, malfunctions, or even damage. Due to the limited internal space of electronic products, and the large size of existing heat dissipation devices, it is difficult to fully integrate them into electronic products, which brings certain challenges to the heat dissipation of electronic products. Utility Model Content

[0003] The utility model mainly provides a heat dissipation device suitable for electronic products.

[0004] In order to achieve the above object, the technical solution of the utility model is as follows:

[0005] A plate-type heat dissipation device comprises a heat dissipation body and a driving device arranged on the heat dissipation body. A channel is arranged in the heat dissipation body, and the driving device is used for driving a fluid to flow in the channel.

[0006] Furthermore, the driving device includes a rotating structure, and the rotating structure is disposed on the heat dissipation body. The rotating structure rotates to provide a force for driving the fluid to flow in the channel.

[0007] Furthermore, the rotating structure includes a rotor, a coil driving the rotor to rotate, and a control board; the coil is arranged on the control board and is arranged opposite to the rotor.

[0008] Furthermore, the rotor comprises a plurality of permanent magnets arranged in a ring shape, and the magnetic poles of two adjacent permanent magnets are in opposite directions;

[0009] The coil includes a plurality of coil units, and the coil units are arranged opposite to the permanent magnet;

[0010] The control board is provided with a controller and a Hall sensor.

[0011] Furthermore, the rotating structure also includes a central axis, and the control board, the coil and the rotor are sequentially arranged along the axial direction of the central axis.

[0012] Furthermore, the rotating structure also includes a sleeve and a fixing plate, the sleeve is sleeved on the outer periphery of the central shaft, the rotor is sleeved on the outer periphery of the sleeve, and the fixing plate is sleeved on an end of the central shaft away from the coil.

[0013] Furthermore, the heat dissipation body includes a base shell, and the coil and the control board are arranged inside the base shell or outside the base shell.

[0014] Furthermore, the rotating structure is provided with fan blades, and the fan blades rotate along with the rotating structure to drive the fluid to flow in the channel;

[0015] The fan blade comprises a side wall and blades extending outward from the side wall, and the rotating structure is arranged in the side wall.

[0016] Further, the channel includes a plurality of circulation channels;

[0017] The circulation channel is formed by enclosing fins arranged in the heat dissipation body.

[0018] Furthermore, the heat dissipation body is a liquid cooling plate, a coolant is provided in the circulation channel, and the driving device drives the coolant to circulate along the circulation channel.

[0019] Furthermore, the heat dissipation body is a heat dissipation fin, the channel is formed as an air channel for air flow, and the driving device drives the surrounding air to flow along the channel.

[0020] Compared with the prior art, the plate-type heat dissipation device provided in the above embodiment has at least the following technical effects:

[0021] By integrating a driving device on the heat dissipation body, when the driving device rotates, it can drive the coolant in the device to circulate. The flowing fluid can take away the heat generated by the electronic product and dissipate the heat, thereby meeting the heat dissipation needs of the electronic product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall exploded structure of a heat dissipation device in one embodiment;

[0023] Figure 2 is a schematic diagram of the internal structure of a heat dissipation device in one embodiment;

[0024] Figure 3 This is a schematic diagram of an exploded structure of a rotating structure in one embodiment;

[0025] Figure 4 is a schematic structural diagram of a driving device in one embodiment;

[0026] Figure 5 for Figure 4Schematic diagram of the explosion structure;

[0027] Figure 6 for Figure 4 Schematic diagram of the explosion structure from another perspective;

[0028] Figure 7 It is a schematic diagram of the structure in which the driving device is arranged outside the base shell in one embodiment.

[0029] Description of Figure Numbers:

[0030] 10. heat dissipation body; 11. heat absorption part; 12. base shell; 13. cover plate; 14. channel; 15. rib; 20. drive device; 21. rotating structure; 211. rotor; 2111. permanent magnet; 212. coil; 2121. coil unit; 213. control board; 2131. Hall sensor; 214. shell; 215. center axis; 216. bushing; 217. fixing plate; 30. fan blade; 31. side wall; 32. blade. DETAILED DESCRIPTION

[0031] The technical solution of the utility model is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the utility model. The terms used herein in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. In the following description, the expression "some embodiments" is involved, which describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0032] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0033] Please refer to the attached Figure 1 and 2 An embodiment of the utility model provides a plate-type heat dissipation device, including a heat dissipation body 10 and a driving device 20 disposed on the heat dissipation body 10 . A channel 14 is disposed in the heat dissipation body 10 , and the driving device 20 is used to drive a fluid to flow in the channel 14 .

[0034] In this embodiment, the driving device 20 is integrated on the heat dissipation body. When the driving device 20 rotates, it can drive the surrounding fluid to flow in the channel 14. The flowing fluid can take away the heat generated by the electronic product and dissipate the heat, thereby meeting the heat dissipation requirements of the electronic product. In other embodiments, the driving device can be a pressure difference driving device or a piezoelectric pump to drive the fluid to flow.

[0035] Please refer to the attached Figure 3-6 In an optional embodiment, the driving device 20 includes a rotating structure 21 , which is disposed on the heat dissipation body 10 , and the rotating structure 21 rotates to provide a force for driving the fluid to flow in the channel 14 .

[0036] In an optional embodiment, the rotating structure 21 includes a rotor 211, a coil 212 for driving the rotor 211 to rotate, and a control board 213, wherein the coil 212 is disposed on the control board 213 and is disposed opposite to the rotor 211. The coil 212 and the rotor 211 are disposed axially, so that the rotating structure 21 is more compact, thereby reducing the volume of the rotating structure 21 to a certain extent. When the volume of the rotating structure 21 is reduced, the driving device 20 can be adjusted and optimized accordingly to adapt to a smaller volume requirement. When the volume of the driving device 20 is reduced, the plate-type heat sink can also become smaller accordingly, while still being able to meet the heat dissipation requirements. The coil 212 can be configured in a ring shape. Specifically, the coil 212 can be an integral coil 212, or it can be composed of a plurality of coil units 2121, and these coil units 2121 can be spaced apart. When the coil 212 is energized, the current passing through the coil 212 generates a magnetic field, and this magnetic field can interact with the permanent magnet 2111 or other magnets in the rotor 211, thereby generating a torque to drive the rotor 211 to rotate.

[0037] In an optional embodiment, the rotating structure 21 further includes a housing 214 covering the side of the control board 213 away from the rotor 211. It should be further explained that the control board 213 is arranged below the rotor 211, and the housing 214 is arranged below the control board 213, and an installation space for installing the control board 213 and the coil 212 on the control board 213 is formed in the housing 214. The coil 212 and the rotor 211 can be connected in a contacting manner or in a separated manner.

[0038] In an optional embodiment, the rotor 211 includes a plurality of permanent magnets 2111 arranged in a ring shape, and the magnetic poles of two adjacent permanent magnets 2111 are in opposite directions. In a specific example, the plurality of permanent magnets 2111 are arranged in a ring shape at intervals, and their magnetic poles can be arranged in a manner that adjacent south poles and north poles are arranged alternately. When the coil 212 is supplied with alternating current, the magnetic field generated by the coil 212 interacts with the magnetic field of the permanent magnet 2111 to generate a force or torque to rotate the rotor 211. Specifically, when the magnetic field generated by the coil 212 is in the same direction as the magnetic poles of the permanent magnet 2111, a repulsive force is generated. At the same time, when the magnetic field generated by the coil 212 is in the opposite direction to the magnetic poles of the adjacent permanent magnets 2111, an attractive force is generated. The rotor is kept rotating by the alternating action of the repulsive force and the attractive force.

[0039] In an optional embodiment, the coil 212 includes a plurality of coil units 2121, and the coil units 2121 are arranged relative to the permanent magnet 2111. Specifically, the plurality of coil units 2121 are arranged at intervals and can be independently controlled to achieve more accurate control and regulation of the speed of the rotor 211. In addition, through the arrangement of the plurality of coil units 2121, even if one of the coil units 2121 fails, the other coil units 2121 can still work normally, thereby improving the reliability and fault tolerance of the rotating structure 21.

[0040] In an optional embodiment, a controller and a Hall sensor 2131 are provided on the control board 213. The Hall sensor 2131 is used to detect the position and speed of the rotor 211. The Hall element in the Hall sensor 2131 can sense the permanent magnet 2111 on the rotor 211, and generate a corresponding voltage signal according to the position change of the permanent magnet 2111. The change of the voltage signal can determine the position and speed of the rotor 211. The controller calculates appropriate current and voltage outputs based on the received information on the position and speed of the rotor 211 to drive the rotating structure 21 to rotate, thereby realizing precise control and regulation of the rotor 211.

[0041] In an optional embodiment, the rotating structure 21 further includes a central shaft 215, a sleeve 216 and a fixing plate 217, the sleeve 216 is sleeved on the outer periphery of the central shaft 215, the rotor 211 is sleeved on the outer periphery of the sleeve 216, and the fixing plate 217 is sleeved on the end of the central shaft 215 away from the coil 212. Specifically, the central shaft 215 is used to support the rotor 211 to ensure that the rotor 211 remains stable and balanced during operation. The sleeve 216 rotates with the rotor 211. Compared with the rotor 211 being directly arranged on the outer periphery of the central shaft 215, the technical solution of arranging the sleeve 216 between the central shaft 215 and the rotor 211 can reduce the energy loss during rotation, because the outer periphery of the sleeve 216 is relatively smooth, and the friction between the sleeve 216 and the central shaft 215 is relatively small when the rotor 211 rotates, while the rotor 211 is usually a permanent magnet 2111, and the surface is relatively rough, and the friction between the rotor 211 and the central shaft 215 is relatively large when the rotor 211 rotates.

[0042] In an optional embodiment, the heat dissipation body 10 includes a base shell 12, and the coil 212 and the control board 213 are arranged inside the base shell 12 or outside the base shell 12. Figure 7 When the coil 212 and the control board 213 are arranged outside the base shell 12, the shell 214 of the rotor 211 structure, the control board 213 installed in the shell 214, the coil 212 arranged on the control board 213, the controller and the Hall sensor 2131 are all arranged below the base shell 12 of the heat dissipation body, separated from the channel 14, to avoid the fluid in the channel 14 from affecting the above-mentioned electronic components, thereby ensuring the normal operation and long-term stability of the rotating structure 21.

[0043] In an optional embodiment, the rotating structure 21 is provided with a fan blade 30, and the fan blade 30 rotates with the rotating structure 21 to drive the fluid to flow in the channel 14. When the fan blade 30 rotates, it will better drive the surrounding fluid to flow in the channel 14. Further, the fan blade 30 includes a side wall 31 and a blade 32 extending outward from the side wall 31, and the rotating structure 21 is arranged in the side wall 31. It can be explained that the rotor 211 is arranged in the annular side wall 31 and is fixedly connected to the annular side wall 31, and the blade 32 rotates with the rotating structure 21 to drive the fluid to flow in the channel 14. The fan blade 30 can be formed by stacking multiple layers of fan blade units to increase the strength and rigidity of the fan blade 30 and improve the driving ability of the fan blade 30 to the fluid.

[0044] In an optional embodiment, the channel 14 includes a plurality of circulation channels; the circulation channel 14 is formed by enclosing fins 15 disposed in the heat dissipation body 10. Further, the heat dissipation body 10 includes a heat absorption portion 11 in contact with a heat source, and the driving device 20 is located at one end of the heat dissipation body 10 away from the heat absorption portion 11.

[0045] Please refer again to the attached Figure 2 In a specific example, the heat dissipation body 10 is rectangular, the driving device 20 is arranged at one end of the heat dissipation body 10, and the heat source is installed at the outer end of the heat dissipation body 10 opposite to the driving device 20. The rib 15 can be a U-shaped rib 15 with an opening facing the fan blade 30, and a plurality of U-shaped ribs 15 are arranged at intervals. The opening of the rib 15 on the side close to the driving device 20 is formed into a plurality of fluid inlets or outlets, and the plurality of openings are distributed in a ring shape along the outer side of the fan blade 30, and are all connected to the space where the driving device 20 is located. When the fan blade 30 is arranged on the rotating structure 21 of the driving device 20, the fluid flows along the rotation direction of the fan blade 30, and the plurality of openings are divided into two areas, one of which is an inlet area and the other is an outlet area. The inlet of the inlet area corresponds to the outlet of the outlet area, that is, the fluid enters the channel 14 from the inlet and flows out from the corresponding outlet to the space where the fan blade 30 is located, thus forming a circulation loop. A cover plate 13 is provided on the base shell 12 of the heat dissipation body 10. The base shell 12 and the cover plate 13 together form a hollow cavity structure. The ribs 15 are provided in the cavity structure. The driving device 20 drives the fluid to flow in the channel 14 in the cavity structure. In this embodiment, a plurality of ribs 15 and blades 30 are integrated in the heat dissipation body 10. The plurality of ribs 15 form a circulating flow channel. When the blades 30 rotate, the blades 30 drive the surrounding fluid to accelerate the circulation flow in the circulating flow channel. When the fluid flows in the circulating flow channel, it takes away the heat generated by the heat source from the heat absorption part 11, and dissipates the heat in the process of flowing in the circulating flow channel. The effective heat dissipation area is expanded through the channel 14, so that the heat dissipation device can achieve a better heat dissipation effect while effectively reducing the volume of the heat dissipation device, making it lighter and thinner, and more suitable for electronic products.

[0046] In an optional embodiment, the heat dissipation body 10 is a liquid cooling plate, a coolant is provided in the circulation channel, and the driving device 20 drives the coolant to circulate along the circulation channel. The coolant can be a fluoride coolant, usually composed of potassium fluoride (KF) and potassium lanthanum fluoride (K3LaF6), etc., which has a high specific heat capacity and thermal conductivity, and can provide a better cooling effect under high temperature conditions. In this embodiment, the driving device 20 and the circulation channel are integrated into the liquid cooling plate. The driving device 20 serves as a power source for the circulation of the coolant. The flow of the coolant is used to transfer the heat in the heat source to the coolant, thereby achieving the purpose of dissipating heat from the heat source. It should be further explained that when the heat dissipation body 10 is a liquid cooling plate, the housing 214 of the rotor 211 structure, the control board 213 installed in the housing 214, the coil 212 arranged on the control board 213, the controller and the Hall sensor 2131 are all arranged outside the base shell 12 of the heat dissipation body, separated from the circulation channel, to prevent the coolant in the circulation channel from affecting the above-mentioned electronic components, and the rotor 211 and the fan blades 30 are arranged in the base shell 12 of the heat dissipation body, connected to the circulation channel carrying the coolant, and drive the coolant to circulate. While achieving higher heat dissipation efficiency, the above-mentioned liquid cooling plate has a more compact and thin structure, and is more suitable for some microelectronic products with higher heat dissipation requirements, such as lasers, high-performance computers and chips. The reason is that the existing liquid cooling plate usually requires an external liquid conveying device, such as a circulating pump, to increase the flow rate and circulation efficiency of the liquid. However, the liquid conveying device will take up a certain space, thereby increasing the volume of the entire liquid cooling plate.

[0047] In an optional embodiment, the heat dissipation body 10 is a heat dissipation fin, the channel 14 is formed as an air channel 14 for air flow, and the fan blades 30 rotate to drive the surrounding air to circulate along the channel 14. The heat dissipation body 10 is provided with an air inlet and an air outlet. In this embodiment, the heat dissipation body 10 is in the form of a heat dissipation fin, and the heat source is dissipated by heat conduction between the heat dissipation fin and the surrounding air. The channel 14 forms an air channel 14 for air flow, and the surrounding air can be driven to circulate along the channel 14 by the rotation of the fan blades 30, thereby enhancing the heat dissipation effect on the heat source.

[0048] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. The protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A plate-type heat dissipation device, characterized in that: It comprises a heat dissipation body and a driving device arranged on the heat dissipation body, wherein a channel is arranged in the heat dissipation body, and the driving device is used to drive the fluid to flow in the channel; The driving device comprises a rotating structure, wherein the rotating structure is arranged on the heat dissipation body, and the rotating structure rotates to provide a force for driving the fluid to flow in the channel.

2. The plate type heat sink according to claim 1, characterized in that: The rotating structure includes a rotor, a coil driving the rotor to rotate, and a control board; the coil is arranged on the control board and is arranged opposite to the rotor.

3. The plate type heat sink according to claim 2, characterized in that: The rotor comprises a plurality of permanent magnets arranged in a ring shape, and the magnetic poles of two adjacent permanent magnets are in opposite directions; The coil includes a plurality of coil units, and the coil units are arranged opposite to the permanent magnet; The control board is provided with a controller and a Hall sensor.

4. The plate type heat sink according to claim 2, characterized in that: The rotating structure further includes a central axis, and the control board, the coil and the rotor are sequentially arranged along the axial direction of the central axis.

5. The plate type heat sink according to claim 4, characterized in that: The rotating structure further comprises a sleeve and a fixing plate. The sleeve is sleeved on the outer periphery of the central shaft, the rotor is sleeved on the outer periphery of the sleeve, and the fixing plate is sleeved on an end of the central shaft away from the coil.

6. The plate type heat sink according to claim 2, characterized in that: The heat dissipation body comprises a base shell, and the coil and the control board are arranged inside the base shell or outside the base shell.

7. The plate type heat sink according to claim 1, characterized in that: The rotating structure is provided with fan blades, and the fan blades rotate along with the rotating structure to drive the fluid to flow in the channel; The fan blade comprises a side wall and blades extending outward from the side wall, and the rotating structure is arranged in the side wall.

8. The plate type heat sink according to claim 1, characterized in that: The channel includes a plurality of circulation channels; The circulation channel is formed by enclosing fins arranged in the heat dissipation body.

9. The plate type heat sink according to claim 8, characterized in that: The heat dissipation body is a liquid cooling plate, a cooling liquid is arranged in the circulation channel, and the driving device drives the cooling liquid to circulate along the circulation channel.

10. The plate type heat sink according to claim 1, characterized in that: The heat dissipation body is a heat dissipation fin, the channel is formed as an air channel for air flow, and the driving device drives the surrounding air to flow along the channel.

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