Piezoelectric blower device and electronic equipment
By combining piezoelectric elements, vibrators, gaskets, and perforated plates, and employing an elliptical design and inclined connections, the problems of low air output efficiency and stress concentration in piezoelectric air pumps are solved, achieving a piezoelectric blower with high efficiency heat dissipation and high yield.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING BOE TECH DEV CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-24
AI Technical Summary
Existing piezoelectric air pumps have low air output efficiency and stress concentration problems, resulting in low processing yield and difficulty in meeting the high-efficiency heat dissipation requirements of electronic devices.
The structure adopts a combination of piezoelectric sheet, vibrator, gasket and orifice plate. The piezoelectric sheet and the opening are elliptical in shape. The vibrator, gasket and orifice plate have equal areas. The connecting holes and connecting columns are set at an angle. The elliptical shape reduces the chamber volume and improves the airflow efficiency, and reduces stress concentration.
It improves the air output efficiency of the piezoelectric blower, reduces stress concentration, and increases processing yield, making it suitable for efficient heat dissipation in small electronic devices.
Smart Images
Figure CN224161894U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of piezoelectric jet device technology, and more specifically, to a piezoelectric blower and electronic device. Background Technology
[0002] As electronic devices evolve towards greater integration, miniaturization, and functionality, internal heat is increasingly concentrated and heat flux density is constantly increasing, making them prone to thermal failure. To ensure the reliability and stability of electronic equipment, there is an urgent need to develop new, efficient heat dissipation technologies. Therefore, synthetic jet piezoelectric air pumps are receiving increasing attention.
[0003] Currently, piezoelectric air pumps have low air output efficiency and suffer from stress concentration around the components, resulting in low processing yield. Utility Model Content
[0004] This application aims to provide a piezoelectric blower and electronic device, which is intended to improve the air output efficiency of the piezoelectric blower, reduce stress concentration problems in the piezoelectric blower, and improve the processing yield of the piezoelectric blower.
[0005] The first aspect of this application provides a piezoelectric blower, comprising:
[0006] piezoelectric element;
[0007] An oscillator is connected to the piezoelectric element, and the piezoelectric element is disposed on one side of the oscillator;
[0008] A gasket is disposed on the side of the oscillator away from the piezoelectric sheet, and the gasket has an opening that penetrates through the gasket;
[0009] An orifice plate is disposed on the side of the gasket away from the vibrator, and an air outlet hole is provided in the center of the orifice plate;
[0010] The vibrator, the gasket, and the perforated plate are tightly connected to enclose the opening and form a cavity; the piezoelectric sheet and the opening are both elliptical in shape, and the area of the piezoelectric sheet is smaller than the area of the opening.
[0011] Optionally, the oscillator, the gasket, and the perforated plate are all rectangular in shape, and the oscillator, the gasket, and the perforated plate have the same area.
[0012] The ratio of the major axis to the minor axis of the elliptical piezoelectric sheet is the same as the aspect ratio of the rectangular oscillator.
[0013] The ratio of the major axis to the minor axis of the elliptical opening is the same as the length-to-width ratio of the rectangular gasket.
[0014] Optionally, the perforated plate is provided with a plurality of connecting posts;
[0015] The vibrator and the gasket have connection holes corresponding to the positions of each of the connecting posts;
[0016] The connecting post is inserted into the corresponding connecting hole.
[0017] Optionally, the planar shape of the connecting hole and the connecting post is set to ellipse, and the direction of the major axis of the elliptical connecting hole is at an angle with the length direction of the vibrator and the gasket, and the direction of the major axis of the elliptical connecting post is at an angle with the length direction of the orifice plate.
[0018] Optionally, the included angle is greater than or equal to 30° and less than or equal to 40°.
[0019] Optionally, the air outlet is elliptical in shape, and the major axis of the air outlet is perpendicular to the length direction of the perforated plate.
[0020] Optionally, the thickness of the gasket is greater than or equal to 1.40 mm and less than or equal to 1.60 mm.
[0021] Optionally, the thickness of the perforated plate is greater than or equal to 0.40 mm and less than or equal to 0.60 mm.
[0022] Optionally, the vibrator, the gasket, and the perforated plate are all made of stainless steel.
[0023] A second aspect of this application provides an electronic device including a piezoelectric blower as provided in the first aspect of this application.
[0024] Beneficial effects:
[0025] This application provides a piezoelectric blower and electronic device. The piezoelectric blower includes a piezoelectric sheet, a vibrator, a gasket, and an orifice plate. The piezoelectric sheet is disposed on one side of the vibrator, the gasket is disposed on the side of the vibrator away from the piezoelectric sheet, and the orifice plate is disposed on the side of the gasket away from the vibrator. An opening is formed on the gasket, and an air outlet is formed on the orifice plate. The piezoelectric sheet and the opening are both elliptical in shape, and the area of the piezoelectric sheet is smaller than the area of the opening. By making the opening elliptical, the volume of the enclosed cavity is reduced. This improves the air outlet efficiency during the vibration of the vibrator and reduces the problem of stress concentration around the periphery, thereby improving the manufacturing yield of the piezoelectric blower. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application 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.
[0027] Figure 1 This is a schematic diagram of the structure of a piezoelectric blower according to an embodiment of this application;
[0028] Figure 2 This is a schematic diagram of the planar structure of the oscillator in a piezoelectric blower according to an embodiment of this application;
[0029] Figure 3 This is a schematic diagram of the planar structure of a gasket in a piezoelectric blower according to an embodiment of this application;
[0030] Figure 4 This is a schematic diagram of the planar structure of the orifice plate in a piezoelectric blower according to an embodiment of this application.
[0031] Explanation of reference numerals in the attached diagram: 1. Piezoelectric element; 2. Vibrator; 3. Gasket; 31. Opening; 4. Perforated plate; 41. Vent hole; 51. Connecting hole; 52. Connecting post. Detailed Implementation
[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0033] In related technologies, in small electronic devices such as laptops, due to the limited internal space, circular synthetic jet devices cannot be used as heat dissipation devices. Therefore, rectangular synthetic jet devices are often used to make it easier to place the device inside the electronic device for airflow cooling. However, current rectangular jet devices have problems such as low airflow efficiency and stress concentration around the device.
[0034] In view of this, embodiments of this application propose a piezoelectric blower and electronic device.
[0035] Reference Figure 1 As shown, this is a piezoelectric blower provided in an embodiment of the present application. The piezoelectric blower includes a piezoelectric sheet 1, a vibrator 2, a gasket 3, and a perforated plate 4.
[0036] Specifically, in this piezoelectric blower, the piezoelectric sheet 1, the vibrator 2, the gasket 3, and the perforated plate 4 are stacked sequentially from top to bottom. That is, the piezoelectric sheet 1 is located on one side of the vibrator 2, the gasket 3 is located on the side of the vibrator 2 away from the piezoelectric sheet 1, and the perforated plate 4 is located on the side of the gasket 3 away from the vibrator 2. Electrodes (not shown in the figure) are provided on both sides of the piezoelectric sheet 1. These electrodes are connected to a signal source. After a vibration signal is input to the piezoelectric sheet 1, the piezoelectric sheet 1 will cause the vibrator 2 to vibrate, and the vibration direction of the vibrator 2 is parallel to the normal direction of the piezoelectric sheet 1. The piezoelectric sheet 1 and the vibrator 2 can be connected by adhesive bonding.
[0037] Reference Figure 1 , Figure 3 and Figure 4 As shown, the gasket 3 has an opening 31 that penetrates the gasket 3. After the vibrator 2, the gasket 3 and the perforated plate 4 are connected, the opening 31 will be enclosed to form a cavity. At the same time, an air outlet 41 that penetrates the perforated plate 4 is opened in the center of the perforated plate 4. When the vibrator 2 reciprocates, air will repeatedly flow from the outside into the cavity through the air outlet 41 and then flow out of the cavity to the outside through the air outlet 41. This forms the flow of air, so the piezoelectric blower can be used to blow air to cool the internal components of the electronic equipment.
[0038] Reference Figure 1 As shown in the embodiment of this application, the oscillator 2, the gasket 3, and the perforated plate 4 are all rectangular, while the piezoelectric sheet 1 and the opening 31 are both elliptical in shape, with the area of the piezoelectric sheet 1 being smaller than the area of the opening 31. Setting the opening 31 to an elliptical shape reduces the volume of the chamber (compared to an opening 31 with the same shape as the gasket 3). Therefore, at the same vibration frequency, the vibration of the oscillator 2 can generate a stronger airflow, thereby improving the air output efficiency of the piezoelectric blower. Simultaneously, setting the opening 31 to an elliptical shape makes the edge transition of the chamber smoother, thus reducing stress concentration around the device.
[0039] The elliptical shape of the piezoelectric element 1 allows the oscillator 2 to vibrate more effectively in a specific area, thereby indirectly improving the air output efficiency of the piezoelectric blower. The fact that the area of the piezoelectric element 1 needs to be smaller than the area of the opening 31 is to ensure that the oscillator 2 has a corresponding free end during vibration, allowing it to vibrate more effectively.
[0040] Reference Figure 1As shown, in one embodiment, the vibrator 2, the gasket 3, and the perforated plate 4 are all rectangular, and the areas of the vibrator 2, the gasket 3, and the perforated plate 4 are the same, meaning that the vibrator 2, the gasket 3, and the perforated plate 4 are completely overlapping. Simultaneously, the ratio of the major axis to the minor axis of the elliptical piezoelectric plate 1 is the same as the length-to-width ratio of the rectangular vibrator 2, and the ratio of the major axis to the minor axis of the elliptical opening 31 is the same as the length-to-width ratio of the rectangular gasket 3. For example, the length-to-width ratio of the vibrator 2 can be 4:1, in which case the ratio of the major axis to the minor axis of the piezoelectric plate 1 is also 4:1; the length-to-width ratio of the gasket 3 can be 4:1, in which case the ratio of the major axis to the minor axis of the opening 31 is also 4:1. This makes the processing of the piezoelectric blower easier, thereby improving the processing yield of the piezoelectric blower.
[0041] Reference Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment, connecting posts 52 are provided on the perforated plate 4 at its four corners, and connecting holes 51 are provided at the four corners of the vibrator 2 and the gasket 3. The size of the connecting holes 51 is adapted to the size of the connecting posts 52. When installing the vibrator 2, the gasket 3, and the perforated plate 4, the connecting posts 52 on the perforated plate 4 pass through the corresponding connecting holes 51 on the gasket 3 and the vibrator 2 in sequence, thus connecting the vibrator 2, the gasket 3, and the perforated plate 4. The connecting posts 52 and the connecting holes 51 can be used to position the vibrator 2, the gasket 3, and the perforated plate 4, making the installation of the vibrator 2, the gasket 3, and the perforated plate 4 simpler, thereby improving the yield of the piezoelectric blower.
[0042] Reference Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment, the planar shape of the connecting hole 51 and the connecting post 52 is set to elliptical, and the major axis of the elliptical connecting hole 51 has an angle with the length direction of the vibrator 2 and the gasket 3, and the major axis of the elliptical connecting post 52 has an angle with the length direction of the orifice plate 4.
[0043] Specifically, in this embodiment, both the connecting hole 51 and the connecting post 52 are elliptical in shape, and both the connecting hole 51 and the connecting post 52 are inclined relative to the length direction of the vibrator 2, the gasket 3 and the orifice plate 4, so that the direction of the long axis of the connecting hole 51 / connecting post 52 forms a certain angle with the length direction of the vibrator 2, the gasket 3 and the orifice plate 4. This arrangement makes it easier to position the vibrator 2, the gasket 3 and the orifice plate 4 during installation.
[0044] It should be noted that the ratio of the major axis to the minor axis of the elliptical connecting hole 51 / connecting post 52 is the same as the length-to-width ratio of the vibrator 2, the gasket 3, and the orifice plate 4.
[0045] It should be noted that the connecting post 52 can be processed by stamping, that is, a specific area of the perforated plate 4 is directly stamped to deform the specific area and form the connecting post 52.
[0046] In one embodiment, the included angle is greater than or equal to 30° and less than or equal to 40°. For example, the included angle can be 30°, 32°, 35°, 38°, or 40°. Setting the included angle value within this range can be more conducive to achieving accurate positioning of the vibrator 2, the gasket 3, and the perforated plate 4 during installation.
[0047] Reference Figure 4 As shown, in one embodiment, the vent 41 is elliptical in shape, and the major axis of the elliptical vent 41 is perpendicular to the length direction of the orifice plate 4. Furthermore, the ratio of the major axis to the minor axis of the elliptical vent 41 is the same as the length-to-width ratio of the orifice plate 4. For example, if the length-to-width ratio of the orifice plate 4 is 4:1, the ratio of the major axis to the minor axis of the vent 41 is also 4:1. In this embodiment, the minor axis length of the vent 41 is preferably 0.5mm-0.6mm.
[0048] In one embodiment, the thickness of the gasket 3 is greater than or equal to 1.40 mm and less than or equal to 1.60 mm. Exemplarily, the thickness of the gasket 3 can be 1.40 mm, 1.45 mm, 1.50 mm, 1.55 mm, 1.60 mm, etc.
[0049] In one embodiment, the thickness of the perforated plate 4 is greater than or equal to 0.40 mm and less than or equal to 0.60 mm. Exemplarily, the thickness of the perforated plate 4 can be 0.40 mm, 0.45 mm, 0.50 mm, 0.55 mm, 0.60 mm, etc.
[0050] It should be noted that when forming the connecting post 52 using a stamping process, the height of the connecting post 52 can be half the thickness of the perforated plate 4. For example, when the thickness of the perforated plate 4 is 0.60 mm, the height of the connecting post 52 can be 0.30 mm.
[0051] In one embodiment, the vibrator 2, the gasket 3, and the orifice plate 4 are all made of stainless steel. The stainless steel vibrator 2, gasket 3, and orifice plate 4 have a longer service life, thus extending the service life of the piezoelectric blower.
[0052] It should be noted that in some embodiments, the oscillator 2 may also be made of organic thin film material.
[0053] Based on the same inventive concept, this application discloses an electronic device, including the piezoelectric blower provided in Embodiment 1 of this application.
[0054] Specifically, the electronic device can be a laptop, tablet, mobile phone, monitor, etc.
[0055] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0056] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.
[0057] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.
Claims
1. A piezoelectric blower, characterized in that, include: piezoelectric element; An oscillator is connected to the piezoelectric element, and the piezoelectric element is disposed on one side of the oscillator; A gasket is disposed on the side of the oscillator away from the piezoelectric sheet, and the gasket has an opening that penetrates through the gasket; An orifice plate is disposed on the side of the gasket away from the vibrator, and an air outlet hole is provided in the center of the orifice plate; The vibrator, the gasket, and the perforated plate are tightly connected to enclose the opening and form a cavity; the piezoelectric sheet and the opening are both elliptical in shape, and the area of the piezoelectric sheet is smaller than the area of the opening.
2. The piezoelectric blower according to claim 1, characterized in that: The vibrator, the gasket, and the perforated plate are all rectangular in shape, and the vibrator, the gasket, and the perforated plate have the same area. The ratio of the major axis to the minor axis of the elliptical piezoelectric sheet is the same as the aspect ratio of the rectangular oscillator. The ratio of the major axis to the minor axis of the elliptical opening is the same as the length-to-width ratio of the rectangular gasket.
3. The piezoelectric blower according to claim 1, characterized in that: The perforated plate is provided with multiple connecting posts; The vibrator and the gasket have connection holes corresponding to the positions of each of the connecting posts; The connecting post is inserted into the corresponding connecting hole.
4. The piezoelectric blower according to claim 3, characterized in that: The connecting hole and the connecting post are elliptical in shape, and the direction of the major axis of the elliptical connecting hole is at an angle to the length direction of the vibrator and the gasket, and the direction of the major axis of the elliptical connecting post is at an angle to the length direction of the orifice plate.
5. The piezoelectric blower according to claim 4, characterized in that: The included angle is greater than or equal to 30° and less than or equal to 40°.
6. The piezoelectric blower according to claim 1, characterized in that: The air outlet is elliptical in shape, and the major axis of the air outlet is perpendicular to the length direction of the perforated plate.
7. The piezoelectric blower according to claim 1, characterized in that: The thickness of the gasket is greater than or equal to 1.40 mm and less than or equal to 1.60 mm.
8. The piezoelectric blower according to claim 1, characterized in that: The thickness of the perforated plate is greater than or equal to 0.40 mm and less than or equal to 0.60 mm.
9. The piezoelectric blower according to claim 1, characterized in that: The vibrator, the gasket, and the perforated plate are all made of stainless steel.
10. An electronic device, characterized in that, Includes the piezoelectric blower as described in any one of claims 1-9.