Fluid drive and wireless charger

Abstract

This application discloses a fluid actuator and a wireless charger. The fluid actuator includes a piezoelectric pump, which comprises a pump housing, a base, and multiple sets of vibration components. The pump housing has an air inlet and an air outlet. The base is disposed inside the pump housing and divides the space inside the pump housing into multiple air chambers. Each air chamber is connected to at least one air inlet and at least one air outlet. Each air chamber is provided with at least one set of vibration components, which include an elastic substrate and a piezoelectric element. The elastic substrate is connected to the base, and the piezoelectric element is disposed on the elastic substrate. The piezoelectric element is used to drive the elastic substrate to vibrate when energized, so as to generate an airflow from the air inlet to the air outlet within the air chamber. This can enhance the heat dissipation efficiency of electronic devices and prevent heat from being unable to be dissipated in a timely manner.

Description

Technical Field

[0001] This application relates to the field of heat dissipation technology, and more particularly to a fluid actuator and a wireless charger. Background Technology

[0002] When electronic devices are working, the electronic components inside them generate a lot of heat. Taking a wireless charger as an example, a wireless charger is a charger with wireless charging function. A wireless charger generally includes a wireless charging coil. When the wireless charging coil is energized, it can generate a magnetic field. The magnetic field generated by the wireless charging coil can be used to realize the wireless charging function. During the charging process, the wireless charging coil generates a lot of heat.

[0003] However, if the heat cannot be dissipated in time, the wireless charger will overheat, resulting in lower charging efficiency. Utility Model Content

[0004] This application provides a fluid actuator and a wireless charger that can improve the heat dissipation efficiency of the wireless charger.

[0005] In a first aspect, this application provides a fluid actuator, including a piezoelectric pump, the piezoelectric pump comprising: The pump casing has an air inlet and an air outlet; A base is disposed inside the pump housing and divides the space inside the pump housing into multiple air chambers, each of which is connected to at least one air inlet and at least one air outlet. Multiple sets of vibration components are provided, and at least one set of vibration components is provided in each air cavity. The vibration component includes an elastic substrate and a piezoelectric element. The elastic substrate is connected to the base, and the piezoelectric element is disposed on the elastic substrate. The piezoelectric element is used to drive the elastic substrate to vibrate when energized, so as to generate an airflow from the air inlet to the air outlet in the air cavity.

[0006] Secondly, this application also provides a wireless charger, comprising: A housing having a receiving cavity and an air inlet and an air outlet communicating with the receiving cavity; A wireless charging component is disposed within the receiving cavity; A fluid actuator disposed within the receiving cavity, the piezoelectric pump being configured to generate an airflow within the receiving cavity from the inlet to the outlet; and, An electrical control device is disposed within the receiving cavity. The electrical control device is electrically connected to the piezoelectric element of the piezoelectric pump and is used to supply power to the piezoelectric element.

[0007] The beneficial effects of this application are as follows: Firstly, the fluid actuator can generate airflow within the electronic device. This airflow enhances gas flow within the electronic device and carries away heat, thereby improving the heat dissipation efficiency and preventing overheating caused by insufficient heat dissipation. Secondly, compared to a fan with blades, a piezoelectric pump is easier to make smaller, preventing the installation of a piezoelectric pump from increasing the size of the electronic device. Furthermore, compared to the rotation frequency of the blades in a fan, the vibration frequency of the piezoelectric element can be higher, generating a faster airflow within the electronic device, further improving its heat dissipation efficiency. Additionally, by dividing the pump housing cavity into multiple smaller air chambers via the base, the smaller volume of the air chambers allows for more pronounced disturbances generated during the vibration of the elastic substrate, resulting in a faster airflow. Simultaneously, the simultaneous operation of multiple vibrating components generates a stronger airflow, further enhancing the heat dissipation efficiency of the fluid actuator and consequently, the electronic device. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of a fluid actuator in one embodiment of this application; Figure 2 This is an exploded view of the components of a fluid actuator in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a supercharged electric pump in one embodiment of this application; Figure 4 This is an exploded view of the components of a supercharged electric pump in one embodiment of this application; Figure 5 This is a partial structural schematic diagram of a supercharged electric pump in one embodiment of this application; Figure 6 This is a partial structural diagram of the pneumatic pump when the elastic substrate deforms into the second cavity in one embodiment of this application; Figure 7 This is a partial structural diagram of the pneumatic pump when the elastic substrate deforms into the first cavity in one embodiment of this application; Figure 8 This is a partial structural schematic diagram of a fluid actuator in one embodiment of this application; Figure 9 This is a schematic diagram of the structure of multiple pneumatic pumps from a first-view perspective in one embodiment of this application; Figure 10 This is a schematic diagram of the structure of multiple pneumatic pumps from a second perspective in one embodiment of this application; Figure 11 This is a schematic diagram of the structure of a wireless charger in one embodiment of this application; Figure 12 This is an exploded view of the components of a wireless charger according to one embodiment of this application; Figure 13 This is a partial structural diagram of a wireless charger in one embodiment of this application.

[0010] Figure label: 10. Housing; 11. Receiving cavity; 12. Air inlet; 13. Air outlet; 14. Heat-conducting plate; 15. Top cover; 16. Peripheral side plate; 20. Wireless charging assembly; 30. Fluid actuator; 31. Piezoelectric pump; 311. Air inlet; 312. Air outlet; 313. Pump housing; 313a. Air chamber; 313b. Bottom plate; 313c. Top plate; 313d. Middle frame; 313e. First cavity; 313f. Second cavity; 313g. Air outlet; 314. Base 315. Vibration component; 315a. Elastic substrate; 315b. Piezoelectric element; 32. Frame; 321. Vent; 322. Frame; 323. Cover plate; 33. Airflow channel; 34. First electrical connector; 35. Second electrical connector; 36. Connecting bus; 37. Cable tray; 40. Cooling component; 41. Heat absorption end; 42. Heat release end; 50. Electrical control; 61. First sound insulation component; 62. Air inlet channel; 63. Second sound insulation component; 64. Air outlet channel. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0012] During the operation of electronic devices, the electronic components inside the devices generate a lot of heat. If natural heat dissipation technology is used, the heat dissipation efficiency is low, which can easily lead to the inability to dissipate heat in time, resulting in the electronic device overheating. If a fan is used for heat dissipation, the fan is usually large, and in order to accommodate the fan, the size of the electronic device needs to be increased, which makes the electronic device inconvenient to carry.

[0013] To address the aforementioned technical problems, this application provides a fluid actuator and a wireless charger.

[0014] Firstly, this application provides a fluid actuator, such as... Figures 1 to 3As shown, the fluid actuator 30 includes a piezoelectric pump 31, which includes a pump housing 313, a base 314, and multiple sets of vibration components 315.

[0015] Among them, such as Figures 3 to 5 As shown, the pump housing 313 has an air inlet 311 and an air outlet 312; the base 314 is disposed inside the pump housing 313 and divides the space inside the pump housing 313 into multiple air chambers 313a. Each air chamber 313a is connected to at least one air inlet 311 and at least one air outlet 312, so that the air inlet 311 can be connected to the corresponding air outlet 312 through the corresponding air chamber 313a. The number of air chambers 313a can be two, three or more, and one air chamber 313a can be connected to one or more air inlets 311. The air chamber 313a can also be connected to one or more exhaust ports 312. Each air chamber 313a is provided with at least one set of vibration components 315. The vibration component 315 includes an elastic substrate 315a and a piezoelectric element 315b. The elastic substrate 315a is connected to the base 314. The piezoelectric element 315b is disposed on the elastic substrate 315a. The piezoelectric element 315b is used to drive the elastic substrate 315a to vibrate when energized, so as to generate an airflow from the air inlet 311 to the exhaust port 312 in the air chamber 313a.

[0016] It should be noted that the elastic substrate 315a can be a metal substrate, a plastic substrate, or a substrate made of other materials; the piezoelectric element 315b can be a piezoelectric crystal, piezoelectric ceramic, piezoelectric polymer, or piezoelectric electret, etc., which have a piezoelectric effect. When the piezoelectric element 315b is energized, the piezoelectric element 315b will deform, and this deformation is related to the magnitude and direction of the applied current. When AC power is supplied to the piezoelectric element 315b, the piezoelectric element 315b will generate high-frequency vibration, thereby driving the elastic substrate 315a to swing. When the elastic substrate 315a swings, it causes changes in the airflow in the air cavity 313a, thereby generating an airflow from the air inlet 311 to the air outlet 312 in the air cavity 313a.

[0017] It is understood that the fluid actuator 30 can be applied to electronic devices. The following description uses a wireless charger as an example. The fluid actuator 30 can be placed inside the housing 10 of the wireless charger (e.g.,...). Figure 13Within the housing 10, the fluid actuator 30 generates airflow, which enhances gas flow and removes heat, thereby improving the wireless charger's heat dissipation efficiency. This prevents overheating caused by insufficient heat dissipation, allowing the wireless charger to maintain high-power charging for extended periods. Furthermore, compared to a fan with blades, the piezoelectric pump 31 is more compact, preventing an increase in the wireless charger's size. Moreover, compared to the rotation frequency of the fan blades in a fan, the vibration frequency of the piezoelectric element 315b can be higher, generating faster airflow within the housing 10 and further improving the wireless charger's heat dissipation efficiency.

[0018] Furthermore, it should be noted that the cavity inside the pump housing 313 is divided into multiple smaller air chambers 313a by the base 314. The smaller volume of the air chambers 313a results in more pronounced disturbances when the elastic substrate 315a vibrates, which can generate a faster airflow. In addition, the simultaneous operation of multiple sets of vibration components 315 can generate a stronger airflow, thereby further improving the heat dissipation efficiency of the fluid driver 30, and thus further improving the heat dissipation efficiency of the wireless charger.

[0019] like Figure 6 and Figure 7 As shown, Figure 6 and Figure 7 The dashed arrows in the diagram indicate the direction of gas flow. In some embodiments, each gas chamber 313a includes a first chamber 313e and a second chamber 313f located on opposite sides of the elastic substrate 315a. The first chamber 313e and the second chamber 313f are connected. The first chamber 313e and the second chamber 313f can be connected through an air inlet 313g. The air inlet 311 is connected to the first chamber 313e, and the air outlet 312 is connected to the second chamber 313f. Among them, such as Figure 6As shown, when the piezoelectric element 315b causes the elastic substrate 315a to deform toward the direction of the second cavity 313f, the pressure in the first cavity 313e decreases and the pressure in the second cavity 313f increases, causing external gas to flow into the first cavity 313e through the air inlet 311 and the gas in the second cavity 313f to be discharged through the air outlet 312. Understandably, during this process, the volume of the first cavity 313e expands, causing the pressure inside the first cavity 313e to decrease. This creates a pressure difference between the first cavity 313e and the outside of the pump housing 313, allowing gas from outside the pump housing 313 to flow into the first cavity 313e through the air inlet 311 to replenish the first cavity 313e. At the same time, the volume of the second cavity 313f is compressed and reduced, causing the pressure inside the second cavity 313f to increase. This creates a pressure difference between the second cavity 313f and the outside of the pump housing 313, allowing gas in the second cavity 313f to be quickly discharged through the air outlet 312.

[0020] like Figure 7 As shown, when the piezoelectric element 315b causes the elastic substrate 315a to deform toward the first cavity 313e, the pressure in the first cavity 313e increases and the pressure in the second cavity 313f decreases, causing the gas in the first cavity 313e to flow toward the second cavity 313f, and external gas flows into the second cavity 313f through the exhaust port 312 to replenish the gas in the second cavity 313f. Understandably, during this process, the volume of the first cavity 313e is compressed and reduced, resulting in an increase in pressure within the first cavity 313e. This creates a pressure difference between the first cavity 313e and the outside of the pump housing 313, causing some of the gas in the first cavity 313e to be discharged through the air inlet 311. Simultaneously, the volume of the second cavity 313f increases, resulting in a decrease in pressure within the second cavity 313f. This creates a pressure difference between the second cavity 313f, the first cavity 313e, and the outside of the pump housing 313, causing some of the gas in the first cavity 313e to flow into the second cavity 313f through the air outlet 313g. Additionally, a small amount of gas from outside the pump housing 313 flows into the second cavity 313f through the exhaust outlet 312 to replenish the gas in the second cavity 313f.

[0021] It should also be noted that the airflow port 313g can be formed by creating openings in the elastic substrate 315a and the elastic element; of course, the airflow port 313g can also be formed in other ways, such as... Figure 4 and Figure 5 As shown, the first end of the elastic substrate 315a is connected to the base 314, and the second end of the elastic substrate 315a is spaced apart from the wall of the air cavity 313a, so that an airflow port 313g is formed between the second end of the elastic substrate 315a and the wall of the air cavity 313a.

[0022] In some embodiments, the diameter of the exhaust port 312 is smaller than the diameter of the inlet port 311, making the cross-sectional area of ​​the exhaust port 312 smaller than that of the inlet port 311. The exhaust port 312 is relatively small, which makes the airflow velocity faster when it is discharged from the exhaust port 312, thereby increasing the airflow velocity discharged from the exhaust port 312. At the same time, the smaller diameter of the exhaust port 312 can also reduce or even eliminate the amount of gas flowing back from the outside of the pump housing 313 to the second cavity through the exhaust port 312 when the elastic substrate 315a deforms towards the direction closer to the first cavity. This prevents the airflow flowing back from the exhaust port 312 to the second cavity when the elastic substrate 315a deforms towards the direction closer to the second cavity from affecting the gas in the second cavity to be discharged through the exhaust port 312.

[0023] The diameter of the exhaust vent 312 is R, where 0.1 mm ≤ R ≤ 2 mm. Further, R can be set to 0.5 mm ≤ R ≤ 1.5 mm, and R can be 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, or other sizes.

[0024] In some embodiments, the elastic substrate 315a can be formed of metal materials such as stainless steel and beryllium copper. Stainless steel and beryllium copper have advantages such as high hardness, high strength and high modulus, which can provide sufficient support stability for the piezoelectric element 315b, prevent the piezoelectric element 315b from breaking or deforming, and ensure that the output effect of the piezoelectric element 315b is more stable and reliable.

[0025] The elastic substrate 315a has a thickness of d1, where 0.05 mm ≤ d1, ensuring that the elastic substrate 315a has sufficient thickness. In some embodiments, 0.15 mm ≤ d1, and d1 can be 0.15 mm, 0.3 mm, 0.5 mm, or other sizes.

[0026] The distance between the elastic substrate 315a and the inner wall of the air cavity 313a along the vibration direction of the piezoelectric element 315b is d2, where 0.2 mm ≤ d2 ≤ 1 mm, ensuring sufficient space between the elastic substrate 315a and the inner wall of the air cavity 313a for the elastic substrate 315a to swing. In some embodiments, 0.4 mm ≤ d2 ≤ 0.6 mm. d2 can be 0.4 mm, 0.5 mm, 0.6 mm, or other sizes.

[0027] In some embodiments, the pump housing 313 includes a bottom plate 313b, a top plate 313c, and a middle frame 313d located between the bottom plate 313b and the top plate 313c. An air inlet 311 is located on the top plate 313c, an air outlet 312 is located on the bottom plate 313b, and a base 314 is located between the bottom plate 313b and the top plate 313c. A first cavity is formed between the top plate 313c and the elastic substrate 315a, and a second cavity is formed between the bottom plate 313b and the elastic substrate 315a.

[0028] The thickness of the base plate 313b and the top plate 313c is d3, where 0.1 mm ≤ d3 ≤ 0.2 mm, and d3 can be 0.1 mm, 0.15 mm, 0.2 mm or other dimensions; the distance between the base plate 313b and the top plate 313c is d4, where 0.6 mm ≤ d4 ≤ 1 mm, and d4 can be 0.6 mm, 0.65 mm, 0.8 mm, 1 mm or other dimensions.

[0029] like Figure 1 , Figure 2 as well as Figure 8 In some embodiments, the fluid actuator 30 includes a plurality of piezoelectric pumps 31 and a frame 32. The plurality of piezoelectric pumps 31 are all disposed within the frame 32, allowing them to be integrated onto a single frame 32. When installing the fluid actuator 30, the plurality of piezoelectric pumps 31 can be first installed within the frame 32, and then the frame 32 can be installed within the receiving cavity 11. This facilitates the installation of the multiple piezoelectric pumps 31 within the housing 10, making the installation of the fluid actuator 30 more convenient. The number of piezoelectric pumps 31 can be two, three, or more.

[0030] Among them, such as Figure 8 As shown, Figure 8 The dashed arrows in the diagram indicate the direction of gas flow. Multiple piezoelectric pumps 31 and the inner wall of the frame 32 form an airflow channel 33. The exhaust port 312 is connected to the airflow channel 33, and the frame 32 has a vent 321 connected to the airflow channel 33. It is understood that the exhaust ports 312 of the multiple piezoelectric pumps 31 are all connected to the vent 321 through the airflow channel 33. When the fluid actuator 30 is working, the generated airflow passes sequentially through the inlet 311, exhaust port 312, airflow channel 33, and vent 321. All the piezoelectric pumps 31 exhaust gas through a unified airflow channel 33 to the vent 321, allowing the higher-temperature airflow from the exhaust port 312 to be more concentrated and discharged to the vent 321, thus improving exhaust efficiency and enhancing the heat dissipation efficiency of the fluid actuator 30.

[0031] It should also be noted that when the fluid driver 30 is installed inside the housing 10 of the wireless charger, the vent 321 is connected to the receiving cavity 11 of the housing 10, so that the airflow channel 33 can be connected to the air outlet 13 on the housing through the receiving cavity 11, so that the airflow discharged from the vent 321 can be discharged from the housing 10 through the air outlet 13.

[0032] In some embodiments, such as Figure 1 and Figure 2As shown, the frame 32 may include a frame 322 and a cover plate 323. Multiple electric pneumatic pumps 31 are disposed in the cavity formed by the frame 322 and the cover plate 323. An airflow channel 33 is formed between the multiple electric pneumatic pumps 31 and the inner wall of the frame 322. The cover plate 323 is detachably connected to the frame 322, and the cover plate 323 is provided with an air hole that connects the air inlet 311 and the receiving cavity 11, so that the electric pneumatic pumps 31 can be exposed by removing the cover plate 323, thereby facilitating the inspection and maintenance of the electric pneumatic pumps 31.

[0033] In some embodiments, multiple piezoelectric pumps 31 are arranged in rows along the first direction YY and in columns along the second direction ZZ within the frame 32, thereby forming a grid array; wherein both the first direction YY and the second direction ZZ are perpendicular to the thickness direction of the frame 322, and the first direction YY and the second direction ZZ intersect. It is understood that by arranging piezoelectric pumps 31 along both the first direction YY and the second direction ZZ, a larger number of piezoelectric pumps 31 can be installed in a limited space, thereby enhancing the heat dissipation efficiency of the fluid actuator 30; the first direction YY and the second direction ZZ can be perpendicular or form other angles other than 90 degrees.

[0034] Furthermore, when the fluid driver 30 is applied to a wireless charger, each piezoelectric pump 31 can generate airflow in its area, thereby achieving better local heat dissipation efficiency. Multiple piezoelectric pumps 31 can ensure good heat dissipation efficiency in multiple places within the housing cavity 11, thereby preventing heat from accumulating in the housing cavity 11 and causing local overheating.

[0035] like Figure 9 and Figure 10 As shown, in some embodiments, the fluid actuator 30 further includes a first electrical connector 34, a second electrical connector 35, and a connection bus 36. The first electrical connector 34 and the second electrical connector 35 are respectively located on adjacent sides of the array of piezoelectric pumps 31. One first electrical connector 34 is electrically connected to the electrode terminals of a row of piezoelectric pumps 31, and the second electrical connector 35 is connected to the first electrical connector 34. The connection bus 36 is connected to the first electrical connector 34 through the second electrical connector 35. The connection bus 36 is used to provide a unified power supply or signal input for multiple piezoelectric pumps 31 to realize the synchronous drive or control of each piezoelectric pump 31 in the entire array.

[0036] It is understandable that multiple piezoelectric pumps 31 in a row can be connected through a first electrical connector 34, and multiple first electrical connectors 34 can be connected to a connection bus 36 through second electrical connectors 35, so that all piezoelectric pumps 31 can be connected to a connection bus 36, and the connection bus 36 can be connected to the electrical control 50 in the wireless charger (e.g., Figure 12When the wireless charger is connected to a power source, it can power all the piezoelectric pumps 31 through the electrical control 50 and provide a unified power or signal input to multiple piezoelectric pumps 31 through the connection bus 36. The first electrical connector 34, the second electrical connector 35, and the connection bus 36 can all be FPC (Flexible Printed Circuit) connection cables.

[0037] Furthermore, there may be two second electrical connectors 35, which are located at both ends of the first electrical connector 34 and connected to both ends of the first electrical connector 34 respectively. The two second electrical connectors 35 are connected to the positive and negative terminals of the pneumatic pump 31 through the first electrical connector 34 respectively.

[0038] In some embodiments, the fluid actuator 30 may also include a wiring frame 37 connected to the housing 32, with the connection bus 36 routed on the wiring frame 37 and limited by the wiring frame 37 to prevent the connection bus 36 from getting tangled with other wiring.

[0039] In some embodiments, the thickness of any one of the first electrical connector 34, the second electrical connector 35, and the connecting bus 36 can be d5, where 0.1 mm ≤ d5 ≤ 0.2 mm, and d5 can be 0.1 mm, 0.15 mm, 0.2 mm, or other sizes.

[0040] Secondly, based on the aforementioned fluid actuator, this application also provides a wireless charger, such as... Figures 11 to 13 As shown, the wireless charger includes a housing 10, a wireless charging component 20, and a fluid actuator 30 of any of the above embodiments.

[0041] The housing 10 has a receiving cavity 11 and an air inlet 12 and an air outlet 13 communicating with the receiving cavity 11. The housing 10 can be flat, cuboid, cylindrical or other shapes. The housing 10 can be made of materials with good thermal conductivity, such as copper, aluminum, thermally conductive plastic, etc., to improve the heat dissipation efficiency of the wireless charger. Of course, the housing 10 can also be made of other materials.

[0042] The wireless charging component 20 is disposed within the receiving cavity 11. It should be noted that, as the name suggests, the wireless charging component 20 is a component for wirelessly charging the device to be charged, thereby enabling the wireless charger to have wireless charging functionality. The wireless charging component 20 can rely on electromagnetic waves to propagate energy, converting electromagnetic wave energy into electrical energy, ultimately achieving wireless charging. The specific working principle of wireless charging has been disclosed in related technologies, and will not be elaborated upon in this embodiment.

[0043] A fluid actuator 30 is disposed within the receiving cavity 11, and a piezoelectric pump 31 is used to generate an airflow within the receiving cavity 11 from the inlet 12 to the outlet 13. It is understood that both the inlet 311 and the outlet 312 of the piezoelectric pump 31 are connected to the receiving cavity, such as... Figure 13 As shown, Figure 13 The dashed arrows in the diagram indicate the direction of airflow. When the piezoelectric pump 31 starts, the airflow passes sequentially through the air inlet 12, the receiving cavity 11, the air inlet 311, the air outlet 312, and the air outlet 13. The airflow generated by the piezoelectric pump 31 can enhance the gas flow in the receiving cavity 11 and carry away the heat generated by the wireless charging components 20 and other devices in the receiving cavity 11. This can enhance the heat dissipation efficiency of the wireless charger, prevent the heat in the receiving cavity 11 from not being dissipated in time, and prevent the wireless charger from overheating and causing the charging efficiency to decrease. This allows the wireless charger to maintain a high-power charging mode for a long time.

[0044] The wireless charger also includes an electrical control 50, which is disposed within the receiving cavity 11. The electrical control 50 is electrically connected to the piezoelectric element 315b of the piezoelectric pump 31 and is used to supply power to the piezoelectric element 315b. The electrical control 50 can be a control circuit board and can be connected to a connection bus 36 to provide a unified power or signal input to the piezoelectric elements 315b of multiple piezoelectric pumps 31 through the connection bus 36, so as to realize the synchronous drive or control of the piezoelectric elements 315b of each piezoelectric pump 31 in the entire array.

[0045] In some embodiments, when the fluid driver 30 includes a plurality of piezoelectric pumps 31, the plurality of piezoelectric pumps 31 can be arranged in a direction perpendicular to the thickness direction of the housing 10. By setting up a plurality of piezoelectric pumps 31 for heat dissipation, each piezoelectric pump 31 can generate airflow in its area, thereby achieving better local heat dissipation efficiency. The plurality of piezoelectric pumps 31 can ensure good heat dissipation efficiency in multiple places within the housing cavity 11, thereby preventing heat from accumulating in the housing cavity 11 and causing local overheating. In addition, a single piezoelectric pump 31 can be made smaller and thinner, and the plurality of piezoelectric pumps 31 arranged in a direction perpendicular to the thickness direction of the housing 10 can reduce the thickness of the housing 10 without increasing it, thereby reducing the volume of the housing 10 and thus reducing the volume of the wireless charger, making the wireless charger more convenient to carry and store.

[0046] In some embodiments, the thickness of the housing 10 is d6, where 4 mm ≤ d6 ≤ 20 mm. Further, 8 mm ≤ d6 ≤ 12 mm allows the wireless charger to have a thinner profile, making it more convenient to carry and store. Here, d6 can be 8 mm, 10 mm, 12 mm, or other sizes.

[0047] In some embodiments, the housing 10 includes a heat-conducting plate 14 for contacting a device to be charged. The device to be charged can be a mobile phone, tablet computer, gaming device, AR (Augmented Reality) device, data storage device, audio playback device, video playback device, desktop computing device, wearable device such as electronic watch, electronic glasses, electronic helmet, electronic bracelet, electronic necklace, etc. When charging the device to be charged using a wireless charger, the device to be charged is brought into contact with the outer surface of the heat-conducting plate 14. The heat-conducting plate 14 can be made of thermally conductive glass, thermally conductive ceramic, or other insulating and thermally conductive materials, so that the heat generated by the electronic components inside the device to be charged can be transferred to the receiving cavity 11 through the heat-conducting plate 14.

[0048] The wireless charger also includes a cooling component 40, which has a heat-absorbing end 41 and a heat-releasing end 42. The heat-absorbing end 41 is in contact with the heat-conducting plate 14, and the heat-releasing end 42 is in contact with the fluid actuator 30. The cooling component 40 can be a thermoelectric cooler (TEC). The heat-absorbing end 41 is the cold end of the cooling component 40, and the heat-releasing end 42 is the hot end. The cooling component 40 can transfer the heat absorbed by the heat-absorbing end 41 to the heat-releasing end 42 and release it through the heat-releasing end 42. When the wireless charger is used to charge the device, the heat generated by the device can be transferred to the fluid actuator 30 in sequence through the heat-conducting plate 14, the heat-absorbing end 41, and the heat-releasing end 42. The airflow discharged from the exhaust port 312 of the piezoelectric pump 31 can carry away the heat transferred by the heat-releasing end 42. Thus, while the wireless charger is charging the device, it can also dissipate heat from the device, preventing the temperature of the device from rising and affecting the charging efficiency.

[0049] Specifically, the heat-dissipating end 42 can contact the frame 32, so that the heat transferred by the heat-dissipating end 42 can be transferred to the airflow channel 33. The airflow discharged from the exhaust port 312 of the pneumatic electric pump 31 will carry away the heat in the airflow channel 33 when it flows through the airflow channel 33, which can accelerate the heat dissipation of the heat-dissipating end 42, thereby improving the heat dissipation efficiency of the device to be charged.

[0050] It should also be noted that the airflow channel 33 formed between the frame 32 and the piezoelectric pump 31 is relatively narrow. When the airflow discharged from the exhaust port 312 flows into the airflow channel 33, the airflow will impact the inner wall of the airflow channel 33 (formed by a part of the frame 32). After the airflow collides with the frame 32, it will diffuse in the airflow channel 33, so that the cold gas carried by the airflow can fully contact the hot gas in the airflow channel 33, thereby accelerating the convection exchange of heat in the airflow channel 33, so that the heat in the airflow channel 33 can be discharged more quickly, thereby further improving the heat dissipation efficiency of the device to be charged.

[0051] The airflow channel 33 has a dimension d7 along the thickness direction of the housing 10, where 0.5 mm ≤ d7 ≤ 2 mm. This makes the airflow channel 33 relatively narrow, which can increase the impact force between the airflow discharged from the exhaust port 312 and the frame 32, while also increasing the airflow velocity within the airflow channel 33. d7 can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, or other dimensions.

[0052] In some embodiments, the frame 32 can be a high thermal conductivity material, allowing the heat generated by the device to be charged to be better transferred to the airflow channel 33 through the frame 32, thereby improving the heat dissipation effect of the wireless charger on the device to be charged. The frame 32 can be made of high thermal conductivity metals such as copper, aluminum, copper alloys, or aluminum alloys.

[0053] In some embodiments, the fluid driver 30 and the heat-conducting plate 14 are arranged along the thickness direction of the housing 10, the wireless charging component 20 and the cooling component 40 are both located between the fluid driver 30 and the heat-conducting plate 14, and the cooling component 40 is arranged along the periphery of the wireless charging component 20, so that the arrangement of the fluid driver 30, the wireless charging component 20 and the cooling component 40 is more compact, making full use of the space in the housing cavity 11 and reducing the overall volume of the wireless charger.

[0054] In some embodiments, the housing 10 may further include an upper cover 15 disposed opposite to the heat-conducting plate 14 and a peripheral side plate 16 located between the upper cover 15 and the heat-conducting plate 14, wherein the upper cover 15, the heat-conducting plate 14 and the peripheral side plate 16 together enclose a receiving cavity 11.

[0055] In some embodiments, the wireless charger may further include a first sound-insulating member 61 disposed within the receiving cavity 11. The first sound-insulating member 61 forms an air intake channel 62 between the fluid driver 30 and the housing 10. The air intake 12 is connected to the air inlet 311 through the air intake channel 62. It is understood that the material used to make the first sound-insulating member 61 may be a honeycomb sound-absorbing cotton or a honeycomb ceramic microporous body, etc. When the fluid driver 30 is working, the air outside the wireless charger enters the air intake channel 62 through the air inlet 311 and then flows to the air inlet 311 through the air intake channel 62. The first sound-insulating member 61 can absorb or block the high-frequency sharp noise generated when the airflow flows in the air intake channel 62, thereby achieving a silent effect and preventing the noise generated by the airflow from causing discomfort to the user.

[0056] In some embodiments, the wireless charger further includes a second sound-insulating member 63 disposed within the receiving cavity 11. The second sound-insulating member 63 forms an air outlet channel 64 between the fluid driver 30 and the housing 10, and the air outlet 13 communicates with the air outlet through the air outlet channel 64. It is understood that the material used to manufacture the second sound-insulating member 63 can be a honeycomb sound-absorbing cotton or a honeycomb ceramic microporous body, etc. When the fluid driver 30 is working, the airflow discharged from the air outlet can flow through the air outlet channel 64 to the air outlet 13. The second sound-insulating member 63 can absorb or block the high-frequency sharp noise generated when the airflow flows in the air outlet channel 64, achieving a silent effect and preventing the noise generated by the airflow from causing discomfort to the user.

[0057] It should also be noted that only the first sound insulation component 61 or the second sound insulation component 63 can be provided, or both the first sound insulation component 61 and the second sound insulation component 63 can be provided.

[0058] In some embodiments, the first sound insulation member 61 can be arranged along the thickness direction of the housing 10 with the fluid actuator 30, and the air inlet 311 of the pneumatic pump 31 is disposed facing the first sound insulation member 61, so that the arrangement of the first sound insulation member 61 and the fluid actuator 30 is more compact. More specifically, the first sound insulation member 61 can be disposed opposite to the cover plate 323, and an air intake channel 62 is formed between the first sound insulation member 61, the cover plate 323 and the housing 10.

[0059] In some embodiments, the first sound insulation member 61 is located on the side of the fluid driver 30 away from the heat conduction plate 14, so that the first sound insulation member 61 can avoid the wireless charging component 20 and the cooling component 40.

[0060] In some embodiments, the second sound insulation member 63 can be arranged with the fluid driver 30 in a direction perpendicular to the thickness direction of the housing 10, and the vent 321 of the frame 32 is located on the side of the frame 32 close to the second sound insulation member 63 and is arranged towards the air outlet 64, so that the arrangement of the second sound insulation member 63 and the fluid driver 30 is more compact, and the second sound insulation member 63 can avoid the wireless charging component 20 and the cooling component 40.

[0061] In some embodiments, multiple air outlet channels 64 may be provided, spaced apart from each other. Each air outlet channel 64 is relatively narrow, allowing for faster airflow within the channel. Simultaneously, multiple air outlet channels 64 ensure adequate exhaust volume and heat dissipation efficiency. The number of air outlet channels 64 may be two, three, or more.

[0062] In some embodiments, the air inlet 12 and the air outlet 13 may be located on the peripheral side plate 16 of the housing 10, making it easier to connect the air inlet 12 with the air inlet channel 62 and the air outlet 13 with the air outlet channel 64.

[0063] In some embodiments, thermally conductive fillers such as high thermal conductivity silicone grease or thermally conductive gel can be filled between the wireless charging component 20 and the frame 32 and between the wireless charging component 20 and the heat-conducting plate 14 to expel air between the wireless charging component 20 and the frame 32 and between the wireless charging component 20 and the heat-conducting plate 14, thereby reducing the thermal resistance between the wireless charging component 20 and the frame 32 and between the wireless charging component 20 and the heat-conducting plate 14 and improving heat dissipation efficiency.

[0064] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fluid actuator, characterized in that, Includes a piezoelectric pump, the piezoelectric pump comprising: The pump casing has an air inlet and an air outlet; A base is disposed inside the pump housing and divides the space inside the pump housing into multiple air chambers, each of which is connected to at least one air inlet and at least one air outlet. Multiple sets of vibration components are provided, and at least one set of vibration components is provided in each air cavity. The vibration component includes an elastic substrate and a piezoelectric element. The elastic substrate is connected to the base, and the piezoelectric element is disposed on the elastic substrate. The piezoelectric element is used to drive the elastic substrate to vibrate when energized, so as to generate an airflow from the air inlet to the air outlet in the air cavity.

2. The fluid actuator according to claim 1, characterized in that, Each of the air cavities includes a first cavity and a second cavity located on opposite sides of the elastic substrate, the first cavity and the second cavity being in communication, the air inlet being in communication with the first cavity, and the air outlet being in communication with the second cavity; When the piezoelectric element causes the elastic substrate to deform toward the second cavity, the pressure in the first cavity decreases and the pressure in the second cavity increases, causing external gas to flow into the first cavity through the air inlet and gas in the second cavity to be discharged through the air outlet. When the piezoelectric element causes the elastic substrate to deform toward the first cavity, the pressure in the first cavity increases and the pressure in the second cavity decreases, causing the gas in the first cavity to flow toward the second cavity, and external gas flows into the second cavity through the exhaust port to replenish the gas in the second cavity.

3. The fluid actuator according to claim 1, characterized in that, The diameter of the exhaust port is smaller than that of the air inlet to increase the flow velocity of the airflow discharged from the exhaust port.

4. The fluid actuator according to claim 1, characterized in that, The fluid actuator includes a plurality of the piezoelectric pumps, and the fluid actuator further includes: The frame contains multiple air pumps, and an airflow channel is formed between the multiple air pumps and the inner wall of the frame. The exhaust port is connected to the airflow channel, and the frame has a vent that is connected to the airflow channel.

5. The fluid actuator according to claim 4, characterized in that, Multiple air pumps are arranged in rows along a first direction and in columns along a second direction within the frame, thereby forming a grid array; both the first and second directions are perpendicular to the thickness direction of the frame, and the first and second directions intersect.

6. The fluid actuator according to claim 5, characterized in that, The fluid actuator also includes: A first electrical connector and a second electrical connector are respectively located on adjacent sides of the piezoelectric pump array. One first electrical connector is electrically connected to the electrode terminals of one row of piezoelectric pumps, and the second electrical connector is connected to the first electrical connector. A connection bus is connected to the first electrical connector via the second electrical connector. The connection bus is used to provide a unified power or signal input for multiple piezoelectric pumps to achieve synchronous drive or control of each piezoelectric pump in the entire array.

7. A wireless charger, characterized in that, include: A housing having a receiving cavity and an air inlet and an air outlet communicating with the receiving cavity; A wireless charging component is disposed within the receiving cavity; The fluid actuator as described in any one of claims 1 to 6, wherein the fluid actuator is disposed within the receiving cavity, and the piezoelectric pump is configured to generate an airflow within the receiving cavity from the inlet to the outlet; and, An electrical control device is disposed within the receiving cavity. The electrical control device is electrically connected to the piezoelectric element of the piezoelectric pump and is used to supply power to the piezoelectric element.

8. The wireless charger according to claim 7, characterized in that, The housing includes a heat-conducting plate for contact with the device to be charged, and the wireless charger further includes: A refrigeration component has a heat-absorbing end and a heat-releasing end, wherein the heat-absorbing end is in contact with the heat-conducting plate and the heat-releasing end is in contact with the fluid actuator.

9. The wireless charger according to claim 8, characterized in that, The fluid actuator and the heat-conducting plate are arranged along the thickness direction of the housing. The wireless charging component and the cooling component are both located between the fluid actuator and the heat-conducting plate, and the cooling component is arranged along the periphery of the wireless charging component.

10. The wireless charger according to claim 7, characterized in that, The wireless charger also includes: A first sound-insulating element is disposed within the receiving cavity, and an air intake channel is formed between the first sound-insulating element, the fluid actuator, and the housing. The air intake port communicates with the air inlet through the air intake channel; and / or A second sound insulation component is disposed within the receiving cavity. An air outlet channel is formed between the second sound insulation component, the fluid actuator, and the housing. The air outlet is connected to the air vent through the air outlet channel.

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