Heat dissipation device and electronic equipment

Abstract

The invention relates to the technical field of terminal equipment, in particular to a heat dissipation device and electronic equipment. The heat dissipation device comprises a top plate, a jet flow plate and side walls, at least one first cavity is defined by the top plate, the jet flow plate and the side walls, at least two inlet areas are arranged on the top plate or the side walls, at least two jet flow areas are arranged on the jet flow plate, and at least two execution structures and at least two driving structures for driving the execution structures are arranged in the first cavity. The fixed end of the execution structure is used for being connected with the side, close to the side wall, of the jet plate, the free end extends towards the side away from the fixed end, and the driving structure drives the free end to reciprocate towards the side close to or away from the jet plate. The free ends of the at least two execution structures are arranged at intervals, the inlet areas are arranged on the sides, away from the jet flow plate, of the execution structures, one execution structure corresponds to at least one jet flow area, and the inlet areas and the jet flow areas are not overlapped with gaps between the at least two execution structures. The heat dissipation device provided by the invention has relatively high heat dissipation efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of terminal equipment, and in particular to a heat dissipation device and an electronic device. Background Art

[0002] With the continuous development of terminal chip technology, large-scale gaming software, and 5G services, the power consumption of terminal devices continues to increase. At the same time, consumers' demand for terminal device portability is also increasing. In existing technologies, terminal devices generally use heat dissipation plates and graphene films to dissipate heat. However, the heat dissipation efficiency of heat dissipation plates and graphene films is limited and cannot meet the heat dissipation needs of terminal devices.

[0003] Therefore, a new heat dissipation device is urgently needed to dissipate heat from terminal equipment. Summary of the Invention

[0004] The embodiments of the present application provide a heat dissipation device and an electronic device. The heat dissipation device has high heat dissipation efficiency.

[0005] In a first aspect, the present application provides a heat dissipation device comprising a top plate, a jet plate, and side walls. The top plate, jet plate, and side walls enclose at least one first cavity. The top plate or side wall is provided with at least two inlet areas, and the jet plate is provided with at least two jet areas. The at least two inlet areas and the at least two jet areas are both connected to the first cavity. Within the first cavity are at least two actuators and at least two driving structures. The actuators comprise fixed ends and free ends. The fixed ends of the actuators are configured to connect to a side of the jet plate near the side wall, while the free ends of the actuators extend away from the fixed ends. A gap exists between the free ends of the actuators and both the top plate and the jet plate. At least one driving structure is provided on the actuators, configured to drive the free ends of the actuators to reciprocate toward or away from the jet plate. The free ends of the at least two actuators are spaced apart, and the inlet areas are provided on the side of the actuators facing away from the jet plate. In the projection of the jet plate, one actuator corresponds to at least one jet area, and the inlet areas and the jet areas do not overlap with the gaps between the at least two actuators. It can be understood that, in the projection of the jet plate, one execution structure covers at least one jet area, and the jet area does not overlap with the gap between at least two execution structures. In the present application, the driving structure drives the execution structure to vibrate, and each execution structure in the first cavity vibrates in the same direction under the drive of the driving structure. When the free end of the execution structure vibrates toward the side close to the jet plate, the fluid enters the space between the execution structure and the top plate through the two inlet areas. When the execution structure vibrates toward the side close to the top plate, the fluid between the execution structure and the top plate enters the space between the execution structure and the jet plate through the gap of the execution structure, and is ejected toward the heat source through the jet area on the jet plate to dissipate heat from the heat source. In this way, the fluid is ejected toward the heat source by the driving structure, which is more efficient than the natural heat dissipation of the temperature equalizing plate and the graphene film.

[0006] The drive structure is disposed on the side of the actuator structure facing the top plate. Since the fixed end of the actuator structure is connected to the side wall, the free end of the actuator structure does not interfere with the side wall during movement. Furthermore, the drive structures on each actuator structure input signals of the same frequency and phase, so that each actuator structure vibrates synchronously toward or away from the top plate. This allows each drive structure to drive each actuator structure to vibrate in phase, simplifying the circuitry of the heat dissipation device and facilitating miniaturization of the heat dissipation device. Furthermore, the side wall can be circular, rectangular, or square, and can include multiple side panels connected in sequence.

[0007] In one embodiment, the inlet area is located on a side of the top plate near the side wall, and is distal to the free end of the actuator structure. In this manner, after the fluid enters the first cavity through the inlet area, it can flow rapidly toward the jet area of ​​the jet plate without resonating with the actuator structure. The inlet area can be elongated in the projection of the top plate, or each inlet area can include multiple fluid inlets, each spaced apart and extending through the top plate along its thickness.

[0008] It should be noted that the fluid does not need to resonate with the actuator structure, which can be understood as meaning that the fluid can flow rapidly toward the jet plate without having to maintain stringent resonance conditions with the actuator structure. This increases the design range of the vibration frequency of the vibrating structure, thereby improving product yield. Furthermore, in this approach, the absence of reflective walls within the first cavity increases the flow rate of the fluid within the heat sink, thereby enhancing the heat dissipation capacity of the heat sink.

[0009] In one embodiment, one execution structure corresponds to two jet zones, which can increase the flow rate of the fluid in the gap between the execution structure and the jet plate, thereby improving the heat dissipation effect.

[0010] In one embodiment, one of the two jet zones is located near the fixed end of the actuator structure, while the other is located near the free end of the actuator structure. The jet zone located near the fixed end can minimize the narrow dead zone between the actuator structure and the jet plate, reducing the dramatic pressure fluctuations within the dead zone. This in turn increases the flow rate of fluid in the gap between the actuator structure and the jet plate, thereby improving heat dissipation.

[0011] In one embodiment, along the arrangement direction of the free end of the execution structure and the fixed end of the execution structure, the length of the execution structure is L, the distance between the side of one jet zone away from the fixed end and the fixed end is L1, and the ratio of L1 to L is 0.1 to 0.3, and the distance between the side of the other jet zone away from the free end and the free end is L2, and the ratio of L2 to L is 0.1 to 0.5.

[0012] In one embodiment, the side of the actuator structure facing the jet plate includes at least one first groove, with each first groove corresponding to a jet zone. The first groove can mitigate pressure pulsation in the jet holes of the jet zone facing the actuator structure, reducing backflow from the jet zone's outlet to the jet hole's inlet during the actuator structure's vibration toward the top plate, thereby increasing the total flow rate of fluid flowing out of the jet plate and the flow rate of the fluid flowing out of the jet plate, thereby improving heat dissipation efficiency.

[0013] In one embodiment, in the projection of the jet plate, a first groove covers a jet zone. The first groove covers the corresponding jet zone. When the free end of the actuator vibrates toward the top plate, fluid outside the jet zone is drawn back into the first cavity, increasing the flow rate of the fluid flowing out of the jet plate.

[0014] In the above-mentioned embodiment, the number of first grooves included in the execution structure may be one, two, three or more. When the execution structure includes one first groove, one first groove may also cover the entire jet zone corresponding to the execution structure having the first groove. In some embodiments, when the execution structure includes one first groove, and the jet zone is close to the free end of the execution structure, the execution structure corresponds to one jet zone, and the jet zone is close to the gap between the free ends of the two adjacent execution structures to increase the flow rate of the fluid flowing out through the jet zone. When the execution structure includes two first grooves, one first groove is close to the free end of the execution structure, and the other first groove may be adjacent to the first groove close to the free end. At this time, the execution structure corresponds to two jet zones, and the two first grooves completely cover the two jet zones. Providing two jet zones and two first grooves can increase the flow rate of the fluid flowing out through the jet plate.

[0015] It is worth mentioning that when one of the at least two execution structures is provided with a first groove, the number of first grooves on the other execution structure is at least one. It can be understood that the number of jet zones corresponding to each execution structure can be the same or different.

[0016] In one embodiment, an anchor portion is further provided within the first cavity. The anchor portion is located at the junction of the side wall and the jet plate. The anchor portion is connected to the fixed end of the actuator structure, and in the projection of the jet plate, the inlet area and the anchor portion overlap. The provision of the anchor portion can reduce backflow of fluid entering the first cavity through the inlet area, thereby increasing the flow rate of the fluid in the first cavity. In the projection of the jet plate, the inlet area and the anchor portion overlap, so that the volume of the first cavity corresponding to the inlet area and the anchor portion remains unchanged when the actuator structure vibrates, thereby minimizing backflow of the fluid in the first cavity.

[0017] In one embodiment, the driving structure is disposed on a side of the actuator structure close to the anchor portion, which can improve the energy utilization of the driving structure and drive the free end of the actuator structure to achieve a larger vibration amplitude through a relatively low driving voltage.

[0018] In one embodiment, the heat dissipation device further includes a bottom plate, which is arranged on the side of the jet plate away from the top plate, and the bottom plate is connected to the jet plate through the side wall. The side wall, the bottom plate and the jet plate form a second cavity, and the second cavity is connected to the first cavity through the jet area. The bottom plate is used to carry the heat source. Specifically, the bottom plate can be fitted with the heat source, which can be understood as that the heat source is arranged on the side of the bottom plate away from the jet plate. The side wall includes a plurality of discharge ports, and the discharge ports are located between the bottom plate and the jet plate. The setting of the discharge ports can ensure that the fluid after dissipating heat to the heat source can be quickly dispersed from the shell, prevent the fluid after heat exchange with the heat source from accumulating in the second cavity, and ensure that the fluid can be stably discharged from the shell.

[0019] In one embodiment, there are two actuator structures, with a gap between their free ends. The two actuator structures can be positioned relative to each other in the first cavity, with the fixed ends of the two actuator structures secured to the sidewalls. A gap exists between the free ends and other side surfaces of the actuator structures and the sidewalls to ensure that the actuator structures can vibrate under the drive of the driving structure.

[0020] In one embodiment, there are four actuator structures, with a gap between the free ends of each pair of adjacent actuator structures. The fixed ends of each of the four actuator structures are fixed to the sidewalls, and a gap exists between the free ends and other side surfaces of the actuator structures and the sidewalls to ensure that the actuator structures can vibrate under the drive of the driving structure. The presence of four actuator structures can increase the flow rate and flow rate of the fluid flowing out of the jet plate, thereby improving the heat dissipation efficiency of the heat sink.

[0021] In the above embodiment, the number of execution structures may also be three, five or more, and the specific number of execution structures is adjusted according to actual needs.

[0022] In the above embodiment, there are multiple first cavities, and each first cavity is provided with at least two execution structures. In this manner, a housing can include multiple first cavities, and the number of execution structures provided in each first cavity can be adjusted as needed.

[0023] In a second aspect, the present application further provides an electronic device comprising a middle frame and at least one heat sink disposed within the middle frame, as described in any of the technical solutions of the first aspect. The electronic device further comprises multiple components, wherein heat-generating components of the multiple components can be attached to a housing of the heat sink, and the heat sink dissipates heat from the components. The electronic device may be a smartphone, a smartwatch, a tablet computer, or a laptop computer. The housing may be a structure within the heat sink or within the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1a A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0025] Figure 1b A schematic diagram of a partial structure of an electronic device provided in an embodiment of the present application;

[0026] Figure 2 A schematic structural diagram of a heat dissipation device provided in an embodiment of the present application;

[0027] Figure 3 for Figure 2 Exploded diagram;

[0028] Figure 4 A cross-sectional view of a heat dissipation device provided in an embodiment of the present application;

[0029] Figure 5 Another cross-sectional view of the heat dissipation device provided in an embodiment of the present application;

[0030] Figure 6 for Figure 5 A schematic diagram of a heat dissipation device performing structural work;

[0031] Figure 7 for Figure 5 Another schematic diagram of the heat dissipation device when performing structural work;

[0032] Figure 8 Another cross-sectional view of the heat dissipation device provided in an embodiment of the present application;

[0033] Figure 9 Another cross-sectional view of the heat dissipation device provided in an embodiment of the present application;

[0034] Figure 10 Another cross-sectional view of the heat dissipation device provided in an embodiment of the present application;

[0035] Figure 11 A schematic diagram of another structure of the heat dissipation device provided in an embodiment of the present application;

[0036] Figure 12 A schematic diagram of another structure of the heat dissipation device provided in an embodiment of the present application;

[0037] Figure 13 A block diagram of a heat dissipation device provided in an embodiment of the present application.

[0038] Reference numerals:

[0039] 01-electronic device; 1-heat dissipation device; 10a-housing; 10-first cavity; 11-top plate; 110-inlet area; 12-side wall; 12a, 12b-side plate; 120-exhaust outlet; 13-jet plate; 130, 130a, 130b, 130c-jet area; 131-jet hole; 14-execution structure; 14a-free end; 14b-fixed end; 140, 140a, 140b, 140c-first groove; 15-driving structure; 16-anchoring part; 17-bottom plate; 18-second cavity; 2-housing; 3-heat-conducting structure; 4-heat source; 5-flow channel; 6-middle frame. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0041] As terminal devices continue to add more functions and consume more power, their heat dissipation needs also increase. In the prior art, heat dissipation in terminal devices is dissipated by providing a heat dissipation module. This heat dissipation module includes at least one cavity, each containing two actuators. The free ends of the two actuators are close to the side walls of the cavity, creating turbulence between the free ends of the actuators and the side walls, resulting in poor heat dissipation.

[0042] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the", and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates otherwise.

[0043] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0044] Figure 1a This is a schematic diagram of the structure of the electronic device provided in the embodiment of the present application. Figure 1aThe embodiment of the present application provides an electronic device, wherein the electronic device 01 is a smart phone, a smart watch, a tablet computer, a laptop computer, etc. The electronic device 01 includes a middle frame 6, a heat dissipation device 1, and multiple components. Figure 1b A schematic diagram of a partial structure of an electronic device provided in an embodiment of the present application, referring to Figure 1a and Figure 1b The heat dissipation device 1 may be disposed within the housing 2, and multiple components and the housing 2 may be disposed within the middle frame 6. The multiple components may include, for example, a processor, internal memory, an external memory interface, a universal serial bus (USB) interface, a charging management module, a power management module, a battery, an antenna, a communication module, a camera, an audio module, a speaker, a receiver, a microphone, an earphone jack, a sensor module, a button, a motor, an indicator, and a subscriber identification module (SIM) card interface.

[0045] The processor may include one or more processing units, for example, an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU). Different processing units may be independent devices or integrated into one or more processors.

[0046] The heat dissipation device 1 can dissipate heat for the components that generate higher heat among the multiple components, such as processors, batteries, communication modules or sensor modules. Specifically, the components that generate higher heat are arranged on the surface of the housing 2, and a heat-conducting structure 3 can be provided between the housing 2 and the components that generate higher heat, so that the heat generated by each component can be quickly dissipated, ensuring the stable operation of each component. Among them, an inlet and an outlet can be provided on the housing 2, and a flow channel 5 can be formed between the housing 2 and the heat dissipation device 1. The fluid enters the flow channel through the inlet, flows into the heat dissipation device 1 through the flow channel 5, and the fluid flows out through the outlet. The component that generates higher heat among the multiple components can be regarded as a heat source 4, and the heat source 4 is provided on the surface of the housing 2 through the heat-conducting structure 3, so that the heat dissipation device 1 dissipates heat for the heat source.

[0047] The heat dissipation device is described in more detail below.

[0048] Figure 2 A schematic diagram of the structure of the heat dissipation device provided in an embodiment of the present application is shown in FIG. Figure 3 for Figure 2 Exploded diagram, Figure 4 A cross-sectional view of the heat dissipation device provided in an embodiment of the present application, Figure 5 Another cross-sectional view of the heat dissipation device provided in the embodiment of the present application, referring to Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The heat dissipation device 1 includes a top plate 11, a jet plate 13, and a side wall 12. The top plate 11, the jet plate 13, and the side wall 12 enclose at least one first cavity 10, and the top plate 11, the jet plate 13, and the side wall 12 may also constitute a shell. At least two inlet areas 110 are provided on the top plate 11 or the side wall 12, and at least two jet areas 130 are provided on the jet plate 13. The at least two inlet areas 110 and the at least two jet areas 130 are both connected to the first cavity 10. The shape of the shell may be rectangular, square, circular, or other irregular shapes, and the shape of the first cavity 10 may also be rectangular, square, circular, or other irregular shapes. In one embodiment, at least two actuator structures 14 and at least two driving structures 15 are disposed within the first cavity 10. The free ends 14a of the at least two actuator structures 14 are spaced apart, and the fixed ends 14b of the actuator structures 14 are connected to the side of the jet plate 13 near the sidewall 12. The free ends 14a of the actuator structures 14 extend away from the fixed ends 14b, leaving gaps between the free ends 14a of the actuator structures 14 and both the top plate 11 and the jet plate 13. The driving structures 15 are disposed on the actuator structures 14 and are configured to drive the free ends 14a of the actuator structures 14 to vibrate back and forth toward or away from the jet plate 13. Each actuator structure 14 corresponds to at least one jet zone 130. This means that, in the projection of the jet plate 13, each actuator structure 14 covers at least one jet zone 130. In the projection of the jet plate 13, the inlet zone 110 and the jet zone 130 do not overlap with the gaps between the at least two actuator structures 14. Figure 6 for Figure 5 A schematic diagram of the heat dissipation device performing structural work. Figure 7 for Figure 5 Another schematic diagram of the heat dissipation device during structural work, see Figures 3 to 7When the heat dissipation device 1 is working, the driving structure 15 drives the execution structure 14 to vibrate. Under the action of the driving structure 15, each execution structure 14 performs the same vibration. In the process of the driving structure 15 driving the free end 14a to vibrate back and forth toward or away from the jet plate 13, when the free end 14a of the execution structure 14 vibrates toward the side close to the jet plate 13, the fluid enters the space between the execution structure 14 and the top plate 11 through at least two inlet areas 110. When the execution structure 14 vibrates toward the side close to the top plate 11, the fluid located between the execution structure 14 and the top plate 11 enters the space between the execution structure 14 and the jet plate 13 through the gap between the free ends 14a of at least two execution structures 14, and is ejected toward the heat source through the jet area 130 on the jet plate 13, so as to improve the heat dissipation efficiency of the heat source.

[0049] It is worth mentioning that in the present application, the driving structures 15 on each actuator structure 14 input the same frequency and phase signals, so that each actuator structure 14 can vibrate synchronously toward the side closer to the top plate 11 or away from the top plate 11. This method only requires one electrical signal to achieve the same phase vibration of each driving structure 15 and each actuator structure 14, which can simplify the circuit of the heat dissipation device and facilitate the miniaturization of the heat dissipation device.

[0050] Furthermore, the fixed end 14b of the actuator 14 is connected to the side of the jet plate 13 near the side wall 12. Alternatively, the fixed end 14b of the actuator 14 is connected to the side of the jet plate 13 facing the top plate 11. When the fluid enters the first cavity 10 through the inlet area 110, the turbulence between the free end 14a of the actuator 14 and the side wall 12 is relatively small, resulting in a relatively low flow resistance encountered by the fluid flowing in the first cavity 10. This in turn increases the flow velocity of the fluid within the heat sink, thereby improving the heat dissipation capacity of the heat sink. Furthermore, by connecting the fixed end 14b of the actuator 14 to the side of the jet plate 13 near the side wall 12, the free end 14a of the actuator 14 does not interfere with the side wall 12 during movement, thereby improving the operational stability of the actuator.

[0051] The operating frequency of the driving structure and the execution structure is an ultrasonic frequency band above 20kHz, and the frequency of the sound waves emitted by the driving structure and the execution structure is beyond the hearing range of the human ear, so that the heat dissipation device has a low noise characteristic.

[0052] In the above embodiment, the side wall 12 can be in various shapes such as circular, rectangular or square. When the side wall 12 is rectangular or square, the side wall 12 can include multiple side panels connected in sequence, and the execution structure 14 can be fixed to one side of the adjacent side panel.

[0053] The number of the execution structures 14 in each first cavity 10 can be two, three, four or more, and can be adjusted according to actual needs. Figures 3 to 7 When the first chamber 10 includes two actuator structures 14, the fixed end 14b of one actuator structure 14 is fixed to one side of the side panel 12a of the side wall 12 proximate to the jet plate 13, and the fixed end 14b of the other actuator structure 14 is fixed to one side of the side panel 12b of the side wall 12 proximate to the jet plate 13. The free ends 14a of the two actuator structures 14 are spaced apart. A gap exists between the side surface between the fixed end 14b and the free end 14a of the actuator structure 14 and the other side panels of the side wall 12 to ensure that the actuator structure 14 can vibrate toward or away from the top plate 11 under the drive of the driving structure 15.

[0054] In one embodiment, the inlet area 110 is disposed on a side of the top plate 11 near the side wall 12, and in the projection of the jet plate 13, the inlet area 110 is distal to the free end 14a of the actuator 14. Specifically, the inlet area 110 may coincide with the fixed end of the actuator 14. It can be understood that, in the projection of the jet plate 13, the inlet area 110 is disposed on a side distal to the free end 14a of the actuator 14. After the fluid enters the first cavity 10 through the inlet area 110, it can flow rapidly toward the jet area 130 included in the jet plate 13 without resonating with the actuator 14. Alternatively, the inlet area 110 may be disposed on the side wall 12 used to connect to the fixed end of the actuator 14. When there are two actuators 14, there are also two inlet areas 110, and the two inlet areas 110 are disposed in parallel to ensure sufficient fluid enters the first cavity 10. The fact that the fluid does not need to resonate with the actuator 14 can be understood as meaning that the fluid can flow rapidly toward the jet plate 13 without having to maintain stringent resonance conditions with the actuator. This increases the design range of the vibration frequency of the vibration structure 15, thereby improving product yield. Furthermore, the inlet area 110 is positioned on the side of the top plate 11 near the sidewall 12. This ensures that when the fluid enters the first cavity 10 through the inlet area 110, there are no reflective walls along the fluid's path, thereby increasing the fluid flow rate within the heat sink and thereby enhancing the heat dissipation capacity of the heat sink.

[0055] The first direction is the alignment direction of the free end 14a and fixed end 14b of the actuator 14, and the second direction is the extension direction of the gap between the free ends 14a of the two actuator structures 14. The inlet area 110 is located on the side of the top plate 11 near the side wall 12. It can be understood that, along the first direction, the two inlet areas 110 are located on either side of the centerline of the top plate 11. The inlet area 110 located to the left of the centerline is the inlet area 110 near the side plate 12a, and the inlet area 110 located to the right of the centerline is the inlet area 110 near the other side plate 12b.

[0056] It is worth mentioning that the inlet area 110 may be in the shape of an elongated strip in the projection of the top plate 11 , or each inlet area 110 may include a plurality of fluid inlets, each of which is arranged at intervals and passes through the top plate 11 along the thickness direction of the top plate.

[0057] Continue to refer to Figures 3 to 7 In one embodiment, an anchoring portion 16 is provided in the first cavity 10, and the anchoring portion 16 is located at the connection between the side wall 12 and the jet plate 13. It can also be understood that the anchoring portion 16 is fixed to the side of the jet plate 13 facing the top plate 11, and the anchoring portion 16 is connected to the fixed end 14b of the execution structure 14 to fix the execution structure 14. The provision of the anchoring portion 16 can reduce the backflow of the fluid entering the first cavity 10 through the inlet area 110 and increase the flow rate of the fluid in the first cavity 10. In the projection of the jet plate 13, the inlet area 110 coincides with the anchoring portion 16, so that the first cavity 10 corresponding to the inlet area 110 and the anchoring portion 16 remains unchanged when the execution structure vibrates, thereby reducing the backflow of the fluid in the first cavity 10.

[0058] The number of anchoring portions 16 can be the same as the number of actuator structures 14. Specifically, when there are two actuator structures 14, there can be two anchoring portions 16, with one anchoring portion 16 securing the fixed end of one actuator structure 14. In some other embodiments, multiple actuator structures 14 are secured to one anchoring portion 16, and each actuator structure 14 is provided with a driving structure 15.

[0059] In one embodiment, when setting the driving structure 15, the driving structure 15 is set on the side of the execution structure 14 close to the anchoring portion 16, which can improve the energy utilization rate of the driving structure 15 and drive the free end of the execution structure 14 to achieve a larger vibration amplitude through a relatively low driving voltage.

[0060] In the above embodiment, the number of jet zones 130 provided on the jet plate 13 may be at least two, with the plurality of jet zones 130 arranged along the first direction and extending along the second direction. Each jet zone 130 may include at least one group of jet holes 131, with each group of jet holes including a plurality of jet holes 131 spaced apart along the second direction. The plurality of groups of jet holes 131 may be spaced apart along the first direction, or the plurality of jet holes 131 included in each jet zone 130 may be partially cross-arranged, and the apertures of the respective jet holes 131 may be different. The fluid in the first cavity 10 is ejected toward the heat source through the jet holes 131 included in the jet zone 130 to dissipate heat from the heat source.

[0061] Continue to refer to Figure 4In one embodiment, two jet zones 130 are provided on the jet plate 13, one jet zone 130 corresponding to one execution structure 14. The jet zone 130 is located on the side of the jet plate 13 close to the free end 14a of the execution structure 14, and the projection of the gap between the free ends 14a of the two execution structures 14 on the jet plate 13 does not overlap with the two jet zones 130. Placing the jet zone 130 close to the free ends 14a of the two execution structures 14 can increase the flow rate and flow rate of the fluid in the jet zone 130, thereby improving the heat dissipation effect. When one execution structure 14 corresponds to one jet zone 130, one jet zone 130 can include two groups of jet holes 131, or one jet zone 130 can include multiple groups of jet holes 131, with the multiple groups of jet holes 131 arranged at intervals along the first direction.

[0062] Continue to refer to Figure 5 In one embodiment, four jet zones 130 are provided on the jet plate 13, with each actuator 14 corresponding to two jet zones 130, which may be 130a and 130b, respectively. It can be understood that, from the center of the jet plate 13 toward each anchoring portion 16, each actuator 14 corresponds to one jet zone 130a and one jet zone 130b, with the jet zones 130a and 130b spaced apart. Jet zone 130a is located near the free end 14a of the actuator 14, while jet zone 130b is located near the fixed end 14b of the actuator 14. The jet zone 130a is the main jet zone, and the jet zone 130b can also be understood as being arranged on the side close to the anchoring portion 16. The arrangement of the jet zone 130b can reduce the narrow retention dead zone in the gap between the execution structure 14 and the jet plate 13. The gap is the gap close to the anchoring portion 16, which reduces the violent pressure fluctuations in the retention dead zone, thereby increasing the flow rate of the fluid in the gap between the execution structure 14 and the jet plate 13 to improve the heat dissipation effect.

[0063] Figure 8 This is another cross-sectional view of the heat dissipation device provided in the embodiment of the present application. Figure 8 In one embodiment, six jet zones 130 are provided on the jet plate 13, and one execution structure 14 corresponds to two or three jet zones. The three jet zones may specifically be jet zone 130a, jet zone 130b, and jet zone 130c. It can be understood that, from the center of the jet plate 13 toward each anchoring portion 16, the jet zones 130a, 130b, and 130c corresponding to each execution structure 14 are arranged at intervals. The jet zone 130a near the free ends 14a of the two execution structures 14 is the main jet zone, the jet zone 130b is arranged on one side near the anchoring portion 16, and the jet zone 130c located between the jet zones 130a and 130b is the diverter hole zone. The provision of the diverter hole zone can increase the flow rate of the fluid flowing out of the jet plate.

[0064] To facilitate the proximity of the jet zone to the fixed end and the free end in the above embodiment, along the first direction, the length of the execution structure 14 is L. In the projection of the execution structure 14, the distance between the side of the jet zone 130b away from the fixed end 14b and the fixed end 14b is L1, and the ratio of L1 to L is 0.1 to 0.3. The distance between the side of the other jet zone 130a away from the free end 14a and the free end 14a is L2, and the ratio of L2 to L is 0.1 to 0.5. Alternatively, you can continue to refer to Figure 5 ,exist Figure 5 The center line of the execution structure is a, the jet area 130 b on the left side of the center line a is close to the fixed end 14 b of the execution structure 14 , and the jet area 130 a on the right side of the center line a is close to the free end 14 a of the execution structure 14 .

[0065] Figure 9 This is another cross-sectional view of the heat dissipation device provided in the embodiment of the present application. Figure 9 In one embodiment, two jet zones 130 are provided on the jet plate 13, one corresponding to each actuator 14. Jet zones 130 include multiple groups of jet holes 131. Along the second direction, the leading group of jet holes 131 is located near the free end 14a of the actuator 14, while the trailing group of jet holes 131 is located near the anchoring portion 16. In this case, the one or more groups of jet holes 131 near the anchoring portion 16 can function as a connecting hole zone and can be considered a connecting hole zone.

[0066] In the above embodiment, the number of jet zones 130 in the regions corresponding to the various actuator structures 14 projected on the jet plate 13 may vary. For example, if one actuator structure 14 corresponds to one jet zone 130, another actuator structure 14 may correspond to one, two, or three jet zones 130.

[0067] Continue to refer to Figures 3 to 9 In one embodiment, the execution structure 14 includes at least one first groove 140, and the first groove 140 is provided on the side of the execution structure 14 facing the jet plate 13. The number of the first grooves 140 can be set according to the number of the jet zones 130 corresponding to the execution structure 14. Specifically, Figure 4 As shown, when one execution structure 14 corresponds to one jet area 130, one execution structure 14 includes one first groove 140. Figure 5 As shown, when one execution structure 14 corresponds to one jet area 130a and one jet area 130b, one execution structure 14 includes two first grooves, which are respectively a first groove 140a and a first groove 140b. Figure 8As shown, when one actuator structure 14 corresponds to jet zone 130a, jet zone 130b, and jet zone 130c, one actuator structure 14 includes three first grooves, namely first groove 140a, first groove 140b, and first groove 140c, and so on. First groove 140a, first groove 140b, and third groove 140c can each mitigate pressure pulsation of the jet holes 131 included in the jet zone 130 toward the actuator structure 14, reducing backflow from the outlet of the jet holes 131 to the inlet of the jet holes 131 during the vibration of the actuator structure 14 toward the top plate 11, thereby increasing the total flow rate of the fluid flowing out of the jet plate 13, increasing the flow rate of the fluid flowing out of the jet plate 13, and improving the heat dissipation efficiency.

[0068] Specifically, when providing the first groove 140a, the extending direction of the first groove 140a is the same as the extending direction of its corresponding jet area 130a, and in the projection of the jet plate 13, the first groove 140a completely covers the jet area 130a. This ensures that when the actuator 14 vibrates toward the side of the top plate 11, gas outside the jet area 130a is not absorbed into the first cavity 10, thereby increasing the flow rate of fluid flowing out of the jet plate 13. Similarly, when providing the first groove 14b, the extending direction of the first groove 140b is the same as the extending direction of its corresponding jet area 130b, and in the projection of the jet plate 13, the first groove 140b completely covers the jet area 130b. This ensures that when the actuator 14 vibrates toward the side of the top plate 11, gas outside the jet area 130b is not absorbed into the first cavity 10, thereby increasing the flow rate of fluid flowing out of the jet plate 13. Likewise, the first groove 140 c is disposed in the same manner as the first groove 140 a and the first groove 140 b.

[0069] Figure 10 This is another cross-sectional view of the heat dissipation device provided in the embodiment of the present application. Figure 10 In one embodiment, the housing includes two first cavities 10, each of which includes two execution structures 14, and the two first cavities 10 are arranged adjacent to each other. In some embodiments, the two first cavities 10 in two adjacent first cavities can be connected, that is, the adjacent side walls of the two adjacent first cavities 10 are removed to connect the two first cavities 10. It can also be understood that one first cavity 10 includes four execution structures 14, and the four execution structures 14 are arranged at intervals along the first direction. In this way, four execution structures 14 are provided in one cavity, which can improve heat dissipation efficiency.

[0070] Figure 11 This is another structural diagram of the heat dissipation device provided in the embodiment of the present application. Figure 11In one embodiment, the shell is rectangular or quadrilateral, and the side wall includes four side panels connected in sequence. There are four actuator structures 14 and four drive structures 15 in the first cavity. Four anchoring portions 16 are provided on the side of the jet plate facing the top plate, one anchoring portion is located at the connection between a side panel and the jet plate, the fixed end of the actuator structure 14 is fixed to the anchoring portion 16, and the drive structure 15 is provided on the side of the actuator structure 14 facing the top plate. There is a gap between each two adjacent actuator structures 14. In this case, the actuator structure 14 can be arranged in a triangular shape. In the projection of the jet plate, the gaps between the four actuator structures 14 are interconnected, and the drive structure 15 and the anchoring portion 16 partially overlap or do not overlap. The number of inlet areas included on the top plate is four, and the extension direction of each inlet area is the same as the extension direction of the anchoring portion 16. The two adjacent inlet areas are not connected, and the inlet area is between the gaps between the two adjacent actuator structures 14. In this embodiment, four execution structures 14 are provided in one cavity. The synchronous vibration of the four execution structures 14 can increase the flow velocity and flow rate of the fluid in the jet area on the jet plate, thereby improving the heat dissipation effect.

[0071] It is worth mentioning that when the number of execution structures 14 is four, in the projection of the jet plate, at least one jet zone is set in the area of ​​the jet plate corresponding to each execution structure 14, and the number of jet hole groups included in each jet zone and the shape of the jet holes included in each jet zone can be adjusted according to actual needs.

[0072] Reference Figures 3 to 11 In the above embodiment, the vibration amplitude of the free end of the execution structure 14 is smaller than the gap between the execution structure 14 and the top plate 11 and the jet plate 13, so that when the driving structure 15 drives the execution structure 14 to vibrate toward or away from the top plate 11, the free end 14a of the execution structure 14 will not interfere with the top plate or the jet plate 13, ensuring that the fluid flows into the inlet area 110 under the drive of the execution structure 14 and is discharged at high speed through the jet area 130 to form a jet to dissipate heat from the heat source.

[0073] In the above-mentioned embodiment, the execution structure 14 is a spring, and the driving structure 15 is an electric film or an electromagnetic coil. The heat dissipation device also includes a bottom plate 17, which is located on the side of the jet plate 13 away from the top plate 11. The bottom plate 17 can be arranged parallel to the jet plate 13 and the top plate, or the top plate 11 and the jet plate 13 can be arranged at an angle. The bottom plate 17 is connected to the jet plate 13 through the side wall 12. The bottom plate 17, the side wall 12 and the jet plate 13 form a second cavity 18, and the second cavity 18 is connected to the first cavity 10 through the jet area 130. The bottom plate 17 is used to carry the heat source. The fluid is ejected toward the bottom plate 17 through the jet area 130 to remove the heat generated by the heat source, thereby reducing the temperature of the heat source.

[0074] In one embodiment, the side wall 12 extends to the side of the jet plate 13 facing away from the top plate 11, and the side wall 12 and the side of the jet plate 13 facing away from the top plate 11 form a cavity. The heat source is set in the cavity, and the fluid is ejected toward the heat source through the jet area 130 to cool the heat source.

[0075] Among them, the side wall 12 extends to the part of the jet plate 13 away from the top plate 11 and includes multiple exhaust ports 120. When the heat dissipation device also includes a bottom plate 17, it can be understood that the exhaust ports 120 are located between the bottom plate 17 and the jet plate 13. The setting of the exhaust ports 120 can enable the fluid after heat exchange with the heat source to flow out quickly, ensuring that the fluid can be continuously ejected toward the heat source through the jet area 130.

[0076] Figure 12 Another structural diagram of the heat dissipation device provided in the embodiment of the present application is shown in FIG. Figure 12 The shell 10a may include multiple first cavities, the inlet area 110 in each first cavity is evenly distributed, and the exhaust port 120 in the first cavity is arranged on the peripheral side of the side wall. The structure inside each first cavity is the same as that in the above embodiment and will not be repeated here. Figure 13 A block diagram of a heat dissipation device provided in an embodiment of the present application. Referring to Figure 13, in one embodiment, the heat dissipation device includes a plurality of shells 10a, and the plurality of shells 10a can be distributed in an array, or the plurality of shells can be distributed in an irregular shape. The driving structure in each shell 10a can operate under the same electrical signal input. It can be understood that the execution structure in each shell 10a operates at the same frequency and phase, that is, each driving structure operates at the same frequency and phase, and the fluid is ejected synchronously through the jet zone in each shell. In some embodiments, the execution structures in different shells 10a can operate at different phases. In some embodiments, the working phase of the execution structure in some shells 10a differs from the working phase of the execution structure in another part of the shell 10a by half a cycle to improve the stability of the operation of the heat dissipation device.

[0077] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these modifications and variations.

Claims

1. A heat dissipation device, characterized in that: The heat dissipation device comprises: a top plate, a jet plate and a side wall, wherein the top plate, the jet plate and the side wall enclose at least one first cavity, at least two inlet areas are provided on the top plate or the side wall, at least two jet areas are provided on the jet plate, and the at least two inlet areas and the at least two jet areas are both in communication with the at least one first cavity; At least two execution structures and at least two driving structures are provided in the first cavity. The fixed end of the execution structure is used to connect to the side of the jet plate close to the side wall, and the free end of the execution structure extends to the side away from the fixed end. There is a gap between the free end of the execution structure and the top plate and the jet plate. At least one driving structure is provided on the execution structure, and the driving structure is used to drive the free end of the execution structure to vibrate back and forth toward or away from the jet plate, wherein: The free ends of the at least two execution structures are spaced apart, the inlet area is arranged on the side of the execution structure facing away from the jet plate, in the projection of the jet plate, one execution structure corresponds to at least one jet area, and the inlet area and the gap between the jet area and the at least two execution structures do not overlap.

2. The heat dissipation device according to claim 1, wherein: The inlet area is arranged on a side of the top plate close to the side wall, and the inlet area is away from the free end of the execution structure.

3. The heat dissipation device according to claim 1 or 2, wherein: One execution structure corresponds to two jet areas.

4. The heat dissipation device according to claim 1 or 2, wherein: Among the two jet areas, one of the jet areas is arranged on a side close to the fixed end of the execution structure, and the other jet area is arranged on a side close to the free end of the execution structure.

5. The heat dissipation device according to claim 4, wherein: Along the arrangement direction of the free end of the execution structure and the fixed end of the execution structure, the length of the execution structure is L, the distance between the side of one of the jet zones away from the fixed end and the fixed end is L1, and the ratio of L1 to L is 0.1 to 0.3; the distance between the side of the other jet zone away from the free end and the free end is L2, and the ratio of L2 to L is 0.1 to 0.

5.

6. The heat dissipation device according to any one of claims 1 to 5, characterized in that: The side of the execution structure facing the jet plate includes at least one first groove, and one first groove corresponds to one jet area.

7. The heat dissipation device according to claim 6, wherein: In the projection of the jet plate, one first groove covers one jet area.

8. The heat dissipation device according to any one of claims 1 to 7, wherein: An anchoring portion is further provided in the first cavity. The anchoring portion is located at the connection between the side wall and the jet plate. The anchoring portion is connected to the fixed end of the execution structure. In the projection of the jet plate, the inlet area coincides with the anchoring portion.

9. The heat dissipation device according to claim 8, wherein: The driving structure is arranged on a side of the execution structure close to the anchoring portion.

10. The heat dissipation device according to any one of claims 1 to 9, wherein: The heat dissipation device also includes a bottom plate, which is arranged on the side of the jet plate away from the top plate. The bottom plate is connected to the jet plate through the side wall. The side wall, the bottom plate and the jet plate form a second cavity. The second cavity is connected to the first cavity through the jet area. The bottom plate is used to carry the heat source.

11. The heat dissipation device according to claim 10, wherein: The side wall includes a plurality of discharge ports, and the discharge ports are located between the bottom plate and the jet plate.

12. The heat dissipation device according to any one of claims 1 to 11, characterized in that: There are two execution structures, and a gap exists between the free ends of the two execution structures.

13. The heat dissipation device according to any one of claims 1 to 11, characterized in that: There are four execution structures, and a gap exists between the free ends of every two adjacent execution structures.

14. The heat dissipation device according to any one of claims 1 to 11, wherein: There are multiple first cavities, and each of the first cavities is provided with at least two execution structures.

15. An electronic device, characterized in that: The heat dissipation device comprises a middle frame and at least one heat dissipation device according to any one of claims 1 to 14, which is arranged in the middle frame.

Images