Piezoelectric pump output control method, piezoelectric pump and storage medium

Abstract

The invention provides a piezoelectric pump output control method, a piezoelectric pump and a storage medium. The piezoelectric pump comprises a shell, a compression cavity, a first connecting cavity and a second connecting cavity are formed in the shell, the first connecting cavity and the second connecting cavity are located on the two sides of the compression cavity respectively, and the first connecting cavity and the second connecting cavity both communicate with the compression cavity; the first air inlet pipeline is connected to the shell, and the first air inlet pipeline communicates with the first connecting cavity; the first air outlet pipeline is connected to the shell, and the first air outlet pipeline communicates with the first connecting cavity; the second air inlet pipeline is connected to the shell, and the second air inlet pipeline communicates with the second connecting cavity; the second air outlet pipeline is connected to the shell, and the second air outlet pipeline communicates with the second connecting cavity; and the piezoelectric ceramic assembly is arranged in the compression cavity, and the piezoelectric ceramic assembly can be switched between an expansion state and a contraction state. The piezoelectric pump is provided with the two completely independent air inlet / outlet channels at the same time, and the two completely independent air inlet / outlet channels can be connected with different loads or execute different functions.

Description

piezoelectric pump output control method, piezoelectric pump and storage medium Technical Field

[0001] This application relates to the field of piezoelectric technology, specifically to a piezoelectric pump output control method, a piezoelectric pump, and a storage medium. Background Technology

[0002] A piezoelectric pump is a miniature pump that uses the inverse piezoelectric effect of piezoelectric materials to transport fluids. Due to its advantages such as no electromagnetic interference, simple structure, easy miniaturization and low power consumption, it is widely used in medical equipment, microfluidic systems, electronic heat dissipation and portable gas delivery devices.

[0003] In related technologies, common piezoelectric pumps typically include a single pump chamber enclosed by a housing. A piezoelectric ceramic plate serves as the driving element within the chamber, which is connected to an external fluid passage via an inlet and an outlet. During operation, the piezoelectric ceramic plate periodically expands and contracts under alternating voltage, causing changes in the pump chamber volume and creating a pressure difference at the inlet and outlet, thus outputting compressed gas. However, piezoelectric pumps in related technologies are difficult to adapt to different application scenarios. Summary of the Invention

[0004] Embodiments of this application provide a piezoelectric pump output control method, a piezoelectric pump, and a storage medium.

[0005] In a first aspect, embodiments of this application provide a piezoelectric pump, comprising: a housing having a compression chamber, a first connecting chamber, and a second connecting chamber, the first connecting chamber and the second connecting chamber being located on opposite sides of the compression chamber, both communicating with the compression chamber; a first inlet pipe connected to the housing, communicating with the first connecting chamber; a first outlet pipe connected to the housing, communicating with the first connecting chamber; a second inlet pipe connected to the housing, communicating with the second connecting chamber; a second outlet pipe connected to the housing, communicating with the second connecting chamber; and a piezoelectric ceramic assembly disposed within the compression chamber, the piezoelectric ceramic assembly being switchable between an expanded state and a contracted state.

[0006] In one embodiment, the piezoelectric ceramic assembly includes a mass block, an electrode sheet, and a ceramic sheet stacked sequentially. The mass block and the ceramic sheet are both located within the compression cavity, the electrode sheet is partially located within the compression cavity, and the end of the electrode sheet is located outside the compression cavity.

[0007] In one embodiment, the piezoelectric pump further includes a first filter, a second filter, a third filter, and a fourth filter. The first filter is disposed between the first air inlet pipe and the first connecting cavity, the second filter is disposed between the first air outlet pipe and the first connecting cavity, the third filter is disposed between the second air inlet pipe and the second connecting cavity, and the fourth filter is disposed between the second air outlet pipe and the second connecting cavity.

[0008] In one embodiment, the piezoelectric pump further includes a first check valve, a second check valve, a third check valve, and a fourth check valve; the first check valve is disposed in the first air inlet pipe and configured to unidirectionally flow along the first air inlet pipe to the first connecting cavity; the second check valve is disposed in the first air outlet pipe and configured to unidirectionally flow along the first connecting cavity to the first air outlet pipe; the third check valve is disposed in the second air inlet pipe and configured to unidirectionally flow along the second air inlet pipe to the second connecting cavity; the fourth check valve is disposed in the second air outlet pipe and configured to unidirectionally flow along the second connecting cavity to the second air outlet pipe.

[0009] In one embodiment, the piezoelectric pump further includes two partitions, which surround and form the compression chamber with the inner wall of the housing. The compression chamber is a closed cavity. One partition is located between the compression chamber and the first connecting cavity, and the other partition is located between the compression chamber and the second connecting cavity. Each partition includes an elastic matrix and a conductive element. The elastic matrix forms a receiving cavity filled with electrorheological fluid. At least a portion of the conductive element is located within the receiving cavity and is in contact with the electrorheological fluid.

[0010] In one embodiment, the piezoelectric pump further includes a first electronic connection valve and a second electronic connection valve, wherein the first electronic connection valve connects the first connection chamber and the compression chamber, and the second electronic connection valve connects the second connection chamber and the compression chamber.

[0011] In one embodiment, the piezoelectric pump further includes a connecting valve assembly. The compression chamber includes an upper compression chamber and a lower compression chamber separated from each other. A portion of the piezoelectric ceramic component is located in the upper compression chamber, and a portion of the piezoelectric ceramic component is located in the lower compression chamber. A first electronic connecting valve connects the upper compression chamber and the first connecting chamber, and a second electronic connecting valve connects the lower compression chamber and the second connecting chamber. The connecting valve assembly connects the upper compression chamber and the lower compression chamber. The connecting valve assembly can switch between a first state and a second state. In the first state, the connecting valve assembly is unidirectionally open along the direction from the upper compression chamber to the lower compression chamber. In the second state, the connecting valve assembly is unidirectionally open along the direction from the lower compression chamber to the upper compression chamber.

[0012] In one embodiment, the piezoelectric pump further includes a control component, wherein the first electronic connection valve, the second electronic connection valve, and the connection valve group are all connected to the control component, and the control component is configured to control the on / off state and opening value of the first electronic connection valve, the second electronic connection valve, and the connection valve group based on the first target air output of the first air output pipe and the second target air output of the second air output pipe.

[0013] Secondly, embodiments of this application provide a piezoelectric pump output control method, applied to the piezoelectric pump described above; the number of piezoelectric ceramic components is at least two, and the piezoelectric pump output control method includes: controlling different piezoelectric ceramic components to work in turn.

[0014] According to a third aspect of this application, a non-transitory computer-readable storage medium includes a computer program that, when executed by the processor, implements the piezoelectric pump output control method described above.

[0015] According to a fourth aspect of this application, the computer program product includes a computer program that, when executed by the processor, implements the piezoelectric pump output control method described above.

[0016] The beneficial effects of the embodiments of this application are as follows: In the embodiments of this application, by integrating a three-chamber structure with a dual-sided connecting chamber and a shared compression chamber within a single housing, a piezoelectric pump can simultaneously possess two completely independent inlet / outlet air channels, which can be connected to different loads or perform different functions (such as one channel for cooling electronic components and the other channel for driving microfluidic chips). Compared with piezoelectric pumps in related technologies that only provide a single-channel output, this application can expand the fluid interface without adding an additional pump body, significantly improving the device integration and application flexibility. At the same time, since the two channels share the driving energy of the same piezoelectric ceramic component, the system has low power consumption, unified control logic, and consistent output phase, making it suitable for precision scenarios that require multiple synchronous air supply or differentiated flow distribution, effectively solving the technical problem that existing piezoelectric pumps are difficult to adapt to diverse application needs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0018] Figure 1 is a schematic diagram of the structure of the piezoelectric pump provided in the embodiment of this application; Figure 2 is a cross-sectional view of the piezoelectric pump provided in the embodiment of this application; Figure 3 is a schematic diagram of the internal structure of the piezoelectric pump provided in the embodiment of this application; Figure 4 is an exploded view of the structure of the piezoelectric pump provided in the embodiment of this application; Figure 5 is one of the simplified structural diagrams of a portion of the piezoelectric pump provided in the embodiment of this application; Figure 6 is another simplified structural diagram of a portion of the piezoelectric pump provided in the embodiment of this application. Detailed Implementation

[0019] 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 a part of the embodiments of this application, and not all of the 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. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0020] The piezoelectric pump output control method, piezoelectric pump, and storage medium of this application are described below with reference to Figures 1 to 6.

[0021] According to an embodiment of the first aspect of this application, this application provides a piezoelectric pump. Referring to Figures 1, 2, and 3, the piezoelectric pump includes: a housing 1 having a compression chamber 11, a first connecting chamber 12, and a second connecting chamber 13, the first connecting chamber 12 and the second connecting chamber 13 being located on opposite sides of the compression chamber 11, and both the first connecting chamber 12 and the second connecting chamber 13 communicating with the compression chamber 11; a first air inlet pipe 2 connected to the housing 1, the first air inlet pipe 2 communicating with the first connecting chamber 12; a first air outlet pipe 3 connected to the housing 1, the first air outlet pipe 3 communicating with the first connecting chamber 12; a second air inlet pipe 4 connected to the housing 1, the second air inlet pipe 4 communicating with the second connecting chamber 13; a second air outlet pipe 5 connected to the housing 1, the second air outlet pipe 5 communicating with the second connecting chamber 13; and a piezoelectric ceramic assembly 6 disposed within the compression chamber 11, the piezoelectric ceramic assembly 6 being switchable between an expanded state and a contracted state.

[0022] It is understood that the shell 1 is an integral sealed structure, and the interior is divided into three adjacent but functionally independent fluid chambers by partitions or cavities: the central compression chamber 11 serves as the driving core area, and the first connecting chamber 12 and the second connecting chamber 13 on both sides constitute two independent fluid channel units; the piezoelectric ceramic component 6 is fixedly installed in the compression chamber 11, with its vibration surface facing the cavity wall or directly serving as part of the cavity. When an alternating voltage is applied, the piezoelectric ceramic component 6 periodically switches between an expansion state and a contraction state, causing the volume of the compression chamber 11 to change back and forth; this volume change acts on the first connecting chamber 12 and the second connecting chamber 13 through fluid coupling, so that the gas in the two chambers undergoes the process of inhalation and exhalation in sequence. Specifically, when the piezoelectric ceramic component 6 contracts, the volume of the compression chamber 11 increases and the internal pressure decreases. The gas in the first connecting chamber 12 and the second connecting chamber 13 is drawn in through the first air inlet pipe 2 and the second air inlet pipe 4, respectively. When the piezoelectric ceramic component 6 expands, the volume of the compression chamber 11 decreases and the pressure increases, pushing the gas in the first connecting chamber 12 and the second connecting chamber 13 to be output to the outside through the first air outlet pipe 3 and the second air outlet pipe 5, respectively, thereby realizing two independent and synchronous gas delivery paths.

[0023] This design integrates a three-chamber structure—comprising dual-sided connecting chambers and a shared compression chamber 11—within a single housing 1, enabling a single piezoelectric pump to simultaneously possess two completely independent inlet / outlet channels. These channels can be connected to different loads or perform different functions (such as one channel for cooling electronic components and the other for driving microfluidic chips). Compared to piezoelectric pumps in related technologies that only provide a single-channel output, this application expands the fluid interface without adding an additional pump body, significantly improving device integration and application flexibility. Furthermore, since the two channels share the driving energy of the same piezoelectric ceramic component 6, the system has low power consumption, unified control logic, and consistent output phase, making it suitable for precision scenarios requiring multi-channel synchronous gas supply or differentiated flow distribution. This effectively solves the technical problem that existing piezoelectric pumps are unable to adapt to diverse application needs.

[0024] In some embodiments, referring to Figures 2, 3 and 4, the piezoelectric ceramic assembly 6 includes a mass block 61, an electrode plate 62 and a ceramic plate 63 stacked sequentially. The mass block 61 and the ceramic plate 63 are both located inside the compression cavity 11. The electrode plate 62 is partially located inside the compression cavity 11, and the end of the electrode plate 62 is located outside the compression cavity 11.

[0025] Understandably, the piezoelectric ceramic component 6 adopts a sandwich-style layered structure: the ceramic sheet 63, as the core functional element, is made of piezoelectric material (such as PZT) and exhibits the inverse piezoelectric effect; the electrode sheet 62 is sandwiched on one or both sides of the ceramic sheet 63 to conduct the driving voltage, its main body is embedded inside the compression cavity 11 and closely fitted with the ceramic sheet 63, while one end extends through the wall of the housing 1 and is exposed outside the compression cavity 11, forming an external electrical lead-out terminal; the mass block 61 is fixed to the other side of the ceramic sheet 63, usually made of metal or high-density polymer, to enhance vibration inertia, adjust the resonant frequency, and improve pumping efficiency. The three components are firmly stacked together by bonding, riveting, or pre-tightening bolts, and are installed as a whole in the middle of the compression cavity 11, and sealed and fixed to the housing 1 to ensure the airtightness of the compression cavity 11.

[0026] During operation, the external drive circuit applies an alternating voltage through the end of the electrode plate 62 located outside the compression chamber 11. The current is conducted through the electrode plate 62 to the ceramic plate 63, causing it to undergo periodic deformation. The mass block 61 vibrates synchronously with the ceramic plate 63, causing the volume of the compression chamber 11 to change alternately, thereby driving the gas in the two connecting chambers to be drawn in and discharged through their respective inlet and outlet pipes. Since only the end of the electrode plate 62 extends outside the chamber, while the rest is completely inside the compression chamber 11, the reliability of the electrical connection is ensured, and the number of openings in the housing 1 is minimized, avoiding the risk of leakage caused by too many sealed interfaces. At the same time, the mass block 61 and the ceramic plate 63 are all placed inside the compression chamber 11, allowing the vibration energy to be efficiently coupled to the fluid, improving pumping performance.

[0027] This design, by fully integrating the mass block 61 and ceramic plate 63 and partially extending the electrode plate 62, ensures good electrical connection while maintaining the high sealing performance and structural compactness of the compression chamber 11. It not only simplifies the manufacturing process of the housing 1, but also enhances the mechanical stability of the piezoelectric ceramic component 6 under high-frequency vibration, effectively preventing performance degradation caused by loose leads or sealing failure, thereby ensuring the long-term stable operation of the dual-channel piezoelectric pump in high-reliability scenarios such as medical microfluidics and electronic heat dissipation.

[0028] In some embodiments, referring to Figures 2, 3, and 4, the piezoelectric pump further includes a first filter 21, a second filter 31, a third filter 41, and a fourth filter 51. The first filter 21 is disposed between the first air inlet pipe 2 and the first connecting cavity 12, the second filter 31 is disposed between the first air outlet pipe 3 and the first connecting cavity 12, the third filter 41 is disposed between the second air inlet pipe 4 and the second connecting cavity 13, and the fourth filter 51 is disposed between the second air outlet pipe 5 and the second connecting cavity 13.

[0029] Understandably, four filters are respectively embedded at the junctions of each fluid channel and connecting cavity: the first filter 21 is installed inside the inlet of the first air inlet pipe 2 leading to the first connecting cavity 12, used to intercept dust, fibers, or particulate impurities in the external gas, preventing them from entering the first connecting cavity 12 and the compression cavity 11; the second filter 31 is located at the beginning of the first air outlet pipe 3, i.e., at the outlet position where the gas is output from the first connecting cavity 12 to the first air outlet pipe 3, used to block debris generated by internal wear or aging of sealing materials from being discharged with the airflow, protecting downstream equipment; the third filter 41 and the fourth filter 51 are arranged in the same manner between the second air inlet pipe 4 and the second connecting cavity 13, and between the second air outlet pipe 5 and the second connecting cavity 13, respectively, to achieve bidirectional filtration protection for the second channel. Each filter is made of stainless steel wire mesh, sintered metal, or porous polymer, with the pore size set in the range of 1–50 micrometers according to application requirements, ensuring both sufficient air permeability and effective interception capability.

[0030] This design constructs a dual-channel, omnidirectional particulate protection system by installing independent filters between each air inlet and outlet and its corresponding connection cavity. This not only prevents external contaminants from entering the pump cavity and causing surface contamination, motion stagnation, or sealing failure of the piezoelectric ceramic component 6, but also prevents internally generated particles from entering precision air-using equipment (such as microfluidic chips, optical sensors, or medical catheters) with the output airflow. This significantly improves the reliability and compatibility of the piezoelectric pump in cleanliness-sensitive scenarios. At the same time, the symmetrical distribution of the four-stage filtration structure does not affect the flow resistance balance of the two channels, ensuring the consistency of the dual-output performance and effectively supporting the long-term stable operation of the piezoelectric pump in demanding application scenarios.

[0031] In some embodiments, the piezoelectric pump further includes a first check valve, a second check valve, a third check valve, and a fourth check valve; the first check valve is disposed in the first intake pipe 2 and configured to unidirectionally flow along the first intake pipe 2 to the first connecting cavity 12; the second check valve is disposed in the first outlet pipe 3 and configured to unidirectionally flow along the first connecting cavity 12 to the first outlet pipe 3; the third check valve is disposed in the second intake pipe 4 and configured to unidirectionally flow along the second intake pipe 4 to the second connecting cavity 13; the fourth check valve is disposed in the second outlet pipe 5 and configured to unidirectionally flow along the second connecting cavity 13 to the second outlet pipe 5.

[0032] Understandably, the four check valves are integrated at key nodes of each fluid pipeline: the first check valve is installed at the inlet of the first inlet pipe 2 near the first connecting chamber 12, allowing only external gas to flow into the first connecting chamber 12 from the first inlet pipe 2, preventing backflow; the second check valve is located at the beginning of the first outlet pipe 3, allowing only gas to flow from the first connecting chamber 12 to the first outlet pipe 3, preventing backflow caused by pressure fluctuations at the output end; the third and fourth check valves are arranged in the second inlet pipe 4 and the second outlet pipe 5 respectively, with the same logic, ensuring that the inlet and outlet directions of the second channel are strictly controlled. Each check valve adopts a miniature reed valve, duckbill valve, or ball valve structure, with fast response speed and small opening and closing pressure difference, which matches the low-amplitude high-frequency vibration characteristics of the piezoelectric ceramic component 6.

[0033] During operation, when the piezoelectric ceramic component 6 is in a contracted state, the volume of the compression chamber 11 increases, and the internal pressure decreases. This creates negative pressure in the first connecting chamber 12 and the second connecting chamber 13, causing the first and third one-way valves to open. Gas is then drawn into the two connecting chambers through the first intake pipe 2 and the second intake pipe 4, respectively. When the piezoelectric ceramic component 6 is in an expanded state, the volume of the compression chamber 11 decreases, and the pressure increases. This pressurizes the gas in the first and second connecting chambers 12 and 13, causing the first and third one-way valves to close. Simultaneously, the second and fourth one-way valves open, and the gas is discharged through the first outlet pipe 3 and the second outlet pipe 5, respectively. Through the synergistic action of the four sets of one-way valves, a directional fluid circulation of "intake-isolation-discharge" is forcibly formed, effectively preventing short circuits or backflow of gas between the inlet and outlet ports caused by the piezoelectric-driven reciprocating motion.

[0034] This design constructs two independent, closed fluid circulation loops by setting directional-controlled one-way valves on the inlet and outlet paths of the dual channels, significantly improving pumping efficiency and output stability. Even under load changes or back pressure fluctuations, it can maintain unidirectional flow and prevent cross-interference or flow loss. Combined with the aforementioned filtration structure, it further ensures the reliability and cleanliness of the system in high-precision applications such as microfluidics, medical drug delivery, or electronic cooling, solving the problems of large output pulsation, low efficiency, and limited applicability caused by the lack of flow channel isolation in related technologies.

[0035] In some embodiments, referring to FIG5, the piezoelectric pump further includes two separators 7, which surround and form the compression chamber 11 on the inner wall of the housing 1. The compression chamber 11 is a closed cavity. One of the separators 7 is located between the compression chamber 11 and the first connecting cavity 12, and the other separator 7 is located between the compression chamber 11 and the second connecting cavity 13. The separator 7 includes an elastic matrix 71 and a conductive element. The elastic matrix 71 forms a receiving cavity 72, which is filled with electrorheological fluid. At least a portion of the conductive element is located within the receiving cavity 72 and is in contact with the electrorheological fluid.

[0036] Understandably, the two separators 7 serve as flexible isolation walls between the compression chamber 11 and the first connecting chamber 12, and between the compression chamber 11 and the second connecting chamber 13, respectively. The elastic matrix 71 of each separator 7 is made of silicone rubber, polyurethane, or other highly elastic polymers, and has a closed receiving cavity 72 inside. The receiving cavity 72 is completely filled with electrorheological fluid—a smart fluid that can transform from a low-viscosity fluid to a near-solid rigid material within milliseconds under the action of an external electric field. The conductive element is a metal foil, conductive coating, or filament electrode embedded in the elastic matrix 71, with one end extending into the receiving cavity 72 and in full contact with the electrorheological fluid, and the other end leading out to the outside of the housing 1 for connecting to the control power supply. When the conductive component is not energized, the electrorheological fluid is in a liquid state, and the elastic matrix 71 is soft and deformable, allowing the vibration of the piezoelectric ceramic component 6 to be effectively transmitted to the corresponding connecting cavity through the separator 7, thereby driving the channel to complete the intake and exhaust. When the conductive component is energized, the electrorheological fluid solidifies rapidly under the action of the electric field, causing the elastic matrix 71 to partially or entirely transform into a rigid state. At this time, the separator 7 cannot deform with the vibration of the piezoelectric ceramic component 6, resulting in the volume coupling between the connecting cavity and the compression cavity 11 on the corresponding side being cut off, and the channel on this side no longer produces an effective pumping effect.

[0037] This design achieves active control of the dual-channel operating state by integrating an intelligent response structure containing electrorheological fluid into the separator 7. Users can selectively put either separator 7 into a "deformable" or "rigid" mode by controlling the on / off state of the conductive components, thereby dynamically enabling or disabling the gas output function of the corresponding channel. For example, when only a single gas supply is required, the other separator 7 can be switched to a rigid state to avoid ineffective vibration energy loss and improve system energy efficiency. When dual-channel synchronous output is required, both separators 7 are kept in a flexible state. In addition, this mechanism can also be used to adjust the output phase difference or flow ratio of the two channels, significantly enhancing the piezoelectric pump's adaptability to diverse application scenarios and solving the technical limitation of traditional dual-channel piezoelectric pumps that cannot start and stop independent flow channels as needed.

[0038] In some examples, electrorheological fluids are smart-response suspensions whose basic components include micron-sized particles with high dielectric constants (such as barium titanate, silica-coated conductive polymers, or carbon nanotubes) uniformly dispersed in a low-viscosity insulating carrier fluid (such as silicone oil or mineral oil). Without an applied electric field, the particles are randomly distributed, exhibiting Newtonian fluid behavior and good flowability. When a sufficiently strong DC or low-frequency AC electric field (typically 1–5 kV / mm) is applied, the particles rapidly align into chain-like or columnar structures along the electric field direction, causing the fluid to exhibit a near-solid-state high shear modulus within milliseconds, displaying significant rigidity characteristics. This phase transition process is completely reversible. For example, a typical electrorheological fluid can transform from a liquid state with a viscosity of approximately 50 mPa·s to a near-solid state with a storage modulus exceeding 10 kPa within 0.5 ms, and recover its initial flowability within 10 ms after power is de-energized. This feature enables the separator 7 filled with electrorheological fluid to switch quickly and reliably between a flexible deformation state and a rigid locking state under the control of an external electrical signal, thereby providing the piezoelectric pump with dynamic and reconfigurable flow channel control capability.

[0039] In some embodiments, referring to FIG6, the piezoelectric pump further includes a first electronic connection valve 8 and a second electronic connection valve 9, wherein the first electronic connection valve 8 connects the first connection chamber 12 and the compression chamber 11, and the second electronic connection valve 9 connects the second connection chamber 13 and the compression chamber 11.

[0040] It is understood that the first electronic connection valve 8 is an electrically controlled on / off fluid valve. Its valve body is embedded in the wall of the housing 1 separating the first connection chamber 12 and the compression chamber 11, and it has an electrically operable valve core or diaphragm inside. When the first electronic connection valve 8 is open, a fluid passage is formed between the first connection chamber 12 and the compression chamber 11. The volume change of the piezoelectric ceramic component 6 can directly act on the first connection chamber 12, driving gas to be drawn in through the first inlet pipe 2 and discharged through the first outlet pipe 3. When the first electronic connection valve 8 is closed, the first connection chamber 12 and the compression chamber 11 are physically isolated. Even if the piezoelectric ceramic component 6 is working, the pressure in the first connection chamber 12 is not affected, and the channel stops outputting. Similarly, the second electronic connection valve 9 is disposed on the wall of the housing 1 between the second connection chamber 13 and the compression chamber 11, and independently controls the on / off state of the second channel through an electronic control method.

[0041] This design achieves active and independent control of the dual-channel fluid path by introducing a first electronic connection valve 8 and a second electronic connection valve 9. Users can selectively open or close either channel through external control signals according to actual needs, such as enabling only the first channel for single-path gas supply, or simultaneously opening both channels to achieve synchronous output. Compared with traditional piezoelectric pumps that rely on mechanical structures or passive flow channel designs, this application can dynamically reconstruct the fluid loop without modifying the hardware layout, significantly improving the flexibility, adaptability and intelligence of the equipment, and effectively meeting the diverse application needs for on-demand gas supply, flow distribution or fault redundancy in scenarios such as medical, microfluidics and multi-load heat dissipation.

[0042] In some embodiments, referring to FIG6, the piezoelectric pump further includes a connecting valve assembly 10. The compression chamber 11 includes an upper compression chamber 111 and a lower compression chamber 112 separated from each other. A portion of the piezoelectric ceramic component 6 is located in the upper compression chamber 111, and a portion of the piezoelectric ceramic component 6 is located in the lower compression chamber 112. The first electronic connecting valve 8 connects the upper compression chamber 111 and the first connecting chamber 12, and the second electronic connecting valve 9 connects the lower compression chamber 112 and the second connecting chamber 13. The connecting valve assembly 10 connects the upper compression chamber 111 and the lower compression chamber 112. The connecting valve assembly 10 can switch between a first state and a second state. In the first state, the connecting valve assembly 10 is unidirectionally open along the direction from the upper compression chamber 111 to the lower compression chamber 112. In the second state, the connecting valve assembly 10 is unidirectionally open along the direction from the lower compression chamber 112 to the upper compression chamber 111.

[0043] Understandably, the internal structure of the housing 1 is divided into two independent but interconnected sub-chambers, the compression chamber 11, by a horizontal partition: an upper compression chamber 111 and a lower compression chamber 112. Each chamber contains an independent piezoelectric ceramic component 6, which generates volume changes within its space. A first electronic connection valve 8 is located on the flow channel between the upper compression chamber 111 and the first connection chamber 12, controlling whether the upper compression chamber 111 is connected to the first channel. A second electronic connection valve 9 is located on the flow channel between the lower compression chamber 112 and the second connection chamber 13. The lower compression chamber 112 is connected to the second channel. The connecting valve group 10 is set on the partition between the upper compression chamber 111 and the lower compression chamber 112. It contains a dual-mode check valve structure (e.g., composed of two anti-parallel miniature electromagnetic check valves) that can switch the flow direction electrically. It can switch the working state under the action of external control signal: in the first state, only gas is allowed to flow from the upper compression chamber 111 to the lower compression chamber 112; in the second state, only gas is allowed to flow from the lower compression chamber 112 to the upper compression chamber 111.

[0044] During operation, when the first channel output needs to be driven, the first electronic connection valve 8 is opened, and the connection valve group 10 is placed in the first state. At this time, the pressure wave generated by the vibration of the upper piezoelectric ceramic component 6 can directly act on the first connection chamber 12, while excess gas can flow unidirectionally into the lower compression chamber 112 through the connection valve group 10 to help balance the pressure. When the second channel output needs to be driven, the second electronic connection valve 9 is opened, and the connection valve group 10 is switched to the second state, so that the lower piezoelectric ceramic component 6 dominates the pumping, and the gas can flow back into the upper layer through the connection valve group 10 to maintain system coordination. If dual-channel synchronous output is required, both electronic connection valves can be opened simultaneously, and the state of the connection valve group 10 can be selected according to the phase requirements to achieve pressure coupling and flow coordination between the upper and lower chambers. Through this structure, not only is independent controllability of the two channels achieved, but also the reversible unidirectional conduction characteristic of the connection valve group 10 is utilized to dynamically construct pressure transmission paths between the upper and lower compression chambers 11 under different operating conditions, improving pumping efficiency and response flexibility.

[0045] This design constructs an intelligent piezoelectric pump architecture with bidirectional pressure coupling capability by arranging the compression chamber 11 in layers and introducing a state-switchable connecting valve group 10 and an independently compartmented electronic connecting valve. Compared with fixed flow channels or single-chamber structures, this application can reconstruct the internal fluid dynamics path as needed, supporting multiple operating strategies such as single-channel high flow output, dual-channel asynchronous gas supply, or pressure gain mode, significantly expanding the application potential of piezoelectric pumps in complex microfluidic systems, multi-zone temperature control equipment, and adaptive gas delivery devices.

[0046] In some embodiments, the piezoelectric pump further includes a control component, wherein the first electronic connection valve 8, the second electronic connection valve 9, and the connection valve group 10 are all connected to the control component, and the control component is configured to control the on / off state and opening value of the first electronic connection valve 8, the second electronic connection valve 9, and the connection valve group 10 based on the first target air output of the first air output pipe 3 and the second target air output of the second air output pipe 5.

[0047] It is understood that the control unit is an integrated microcontroller or a dedicated drive circuit. Its input terminal receives the first target air output volume (e.g., 150 mL / min) and the second target air output volume (e.g., 80 mL / min) set by the user or fed back by the system. Its output terminal is electrically connected to the drive unit of the first electronic connection valve 8, the second electronic connection valve 9 and the connection valve group 10 respectively. Each electronic connection valve and the connection valve group 10 are proportional or pulse width modulation (PWM) controllable precision fluid valves, and their opening degree can be continuously adjusted within the range of 0% (fully closed) to 100% (fully open). The control unit dynamically calculates and outputs corresponding control signals based on the ratio and absolute value of the two target air output volumes. For example, when the first target air output volume is greater than the second target air output volume, the control unit increases the opening of the first electronic connection valve 8 while decreasing the opening of the second electronic connection valve 9, and switches the connection valve assembly 10 to the first state (upper → lower conduction), so that more airflow generated by the upper compression chamber 111 is preferentially supplied to the first channel, while some excess airflow flows into the lower layer through the connection valve assembly 10 to assist the second channel in air supply; conversely, the opposite adjustment is made. By coordinating the on / off states and opening values ​​of the three components, independent and precise allocation of the two output flow rates is achieved.

[0048] This design, by introducing electronic valves with adjustable opening and intelligent control components, enables piezoelectric pumps to move beyond the limitations of dual-channel output with equal flow rates. Instead, they can generate asymmetric airflow in any proportion as needed. For example, one channel in a microfluidic chip can be used for sample driving, while the other is used for waste liquid suction, or differentiated airflow can be provided to the primary and secondary heat sources in an electronic heat dissipation system. This dynamic flow distribution capability significantly improves the functional flexibility and system integration efficiency of piezoelectric pumps, solving the technical bottleneck of traditional dual-channel piezoelectric pumps with fixed outputs that cannot adapt to the differentiated needs of multiple loads. It is especially suitable for high-end application scenarios with high requirements for flow accuracy and programmability.

[0049] In some embodiments, the piezoelectric ceramic assembly 6 includes multiple independently driven piezoelectric units, some of which correspond to the upper compression chamber 111 and others to the lower compression chamber 112. The control component is configured to adjust the amplitude or frequency of the driving voltage applied to the upper and lower piezoelectric units respectively according to a first target air output and a second target air output. For example, when the first channel requires a higher flow rate, the control component increases the driving voltage of the upper piezoelectric unit, increasing its amplitude, thereby increasing the volume change rate of the upper compression chamber 111; at the same time, it reduces the excitation intensity of the lower piezoelectric unit to reduce ineffective energy consumption.

[0050] In some embodiments, a miniature flow sensor is provided in the first outlet pipe 3 and / or the second outlet pipe 5, and the flow sensor is electrically connected to the control component. The control component is configured to: collect the actual outlet flow rate in real time, and dynamically correct the opening values ​​of the first electronic connecting valve 8 and the second electronic connecting valve 9 based on the deviation between the actual flow rate and the target outlet flow rate, forming a closed-loop feedback control. For example, if the actual flow rate of the first outlet pipe 3 is detected to be lower than the target value, the control component automatically increases the opening of the first electronic connecting valve 8 and fine-tunes the state of the connecting valve group 10 to compensate for pressure loss.

[0051] In some embodiments, the connecting valve assembly 10 includes two miniature electromagnetic check valves connected in anti-parallel, each controlled by an independent coil; the control component is configured to briefly close the first electronic connecting valve 8 and the second electronic connecting valve 9 before switching the state of the connecting valve assembly 10, and then reopen them after the connecting valve assembly 10 has completed the state switching, in order to avoid pressure surges or gas backflow caused by sudden changes in the flow path.

[0052] In some embodiments, the outer wall of the housing 1 is provided with heat dissipation fins or an integrated thermoelectric cooling module, and the control component is also connected to a temperature sensor for monitoring the operating temperature of the piezoelectric ceramic component 6; when the temperature exceeds a preset threshold, the control component reduces the driving frequency or activates the heat dissipation device to prevent the piezoelectric material from depolarizing due to overheating.

[0053] In some embodiments, the first air intake pipe 2 and the second air intake pipe 4 share an external air intake port, which is connected to a split chamber. The split chamber is connected to the first air intake pipe 2 and the second air intake pipe 4 through two branches respectively. The split chamber is provided with an adjustable guide plate, which is driven by a control component to dynamically change the flow cross-sectional area of ​​the two branches, thereby achieving pre-adjustment of air intake distribution at the source.

[0054] According to an embodiment of the second aspect of this application, this application also provides a piezoelectric pump output control method, applied to the aforementioned piezoelectric pump. The number of the piezoelectric ceramic components 6 is at least two, and the piezoelectric pump output control method includes: S1, controlling different piezoelectric ceramic components 6 to operate in turn.

[0055] In this way, the problem of short service life caused by continuous operation of a single piezoelectric ceramic component 6 can be avoided.

[0056] On the other hand, this application also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by the computer, the computer is able to execute the piezoelectric pump output control method provided by the above methods. The method includes controlling different piezoelectric ceramic components 6 to work in turn.

[0057] According to an embodiment of the fourth aspect of this application, the application further includes a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform the piezoelectric pump output control methods provided above, the method comprising: controlling different piezoelectric ceramic components 6 to operate in turn.

[0058] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0059] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0060] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A piezoelectric pump, characterized in that, include: The housing comprises a compression chamber, a first connecting chamber, and a second connecting chamber, the first and second connecting chambers being located on opposite sides of the compression chamber and both communicating with the compression chamber; a first air inlet pipe connected to the housing and communicating with the first connecting chamber; a first air outlet pipe connected to the housing and communicating with the first connecting chamber; a second air inlet pipe connected to the housing and communicating with the second connecting chamber; a second air outlet pipe connected to the housing and communicating with the second connecting chamber; and a piezoelectric ceramic component disposed within the compression chamber, the piezoelectric ceramic component being switchable between an expanded state and a contracted state.

2. The piezoelectric pump according to claim 1, characterized in that, The piezoelectric ceramic assembly includes a mass block, an electrode sheet, and a ceramic sheet stacked sequentially. The mass block and the ceramic sheet are both located inside the compression cavity, the electrode sheet is partially located inside the compression cavity, and the end of the electrode sheet is located outside the compression cavity.

3. The piezoelectric pump according to claim 1, characterized in that, The piezoelectric pump further includes a first filter, a second filter, a third filter, and a fourth filter. The first filter is disposed between the first air inlet pipe and the first connecting cavity, the second filter is disposed between the first air outlet pipe and the first connecting cavity, the third filter is disposed between the second air inlet pipe and the second connecting cavity, and the fourth filter is disposed between the second air outlet pipe and the second connecting cavity.

4. The piezoelectric pump according to claim 1, characterized in that, The piezoelectric pump further includes a first check valve, a second check valve, a third check valve, and a fourth check valve; the first check valve is located in the first air inlet pipe and is configured to unidirectionally flow along the first air inlet pipe to the first connecting cavity; the second check valve is located in the first air outlet pipe and is configured to unidirectionally flow along the first connecting cavity to the first air outlet pipe; the third check valve is located in the second air inlet pipe and is configured to unidirectionally flow along the second air inlet pipe to the second connecting cavity; the fourth check valve is located in the second air outlet pipe and is configured to unidirectionally flow along the second connecting cavity to the second air outlet pipe.

5. The piezoelectric pump according to any one of claims 1 to 4, characterized in that, The piezoelectric pump further includes two separators, which together with the inner wall of the housing form the compression chamber, which is a closed cavity; one separator is located between the compression chamber and the first connecting cavity, and the other separator is located between the compression chamber and the second connecting cavity; each separator includes an elastic matrix and a conductive element, the elastic matrix forming a receiving cavity, the receiving cavity being filled with electrorheological fluid, and at least a portion of the conductive element being located within the receiving cavity and in contact with the electrorheological fluid.

6. The piezoelectric pump according to any one of claims 1 to 4, characterized in that, The piezoelectric pump further includes a first electronic connection valve and a second electronic connection valve, wherein the first electronic connection valve connects the first connection chamber and the compression chamber, and the second electronic connection valve connects the second connection chamber and the compression chamber.

7. The piezoelectric pump according to claim 6, characterized in that, The piezoelectric pump further includes a connecting valve assembly. The compression chamber includes an upper compression chamber and a lower compression chamber separated from each other. Part of the piezoelectric ceramic component is located in the upper compression chamber, and part of the piezoelectric ceramic component is located in the lower compression chamber. A first electronic connecting valve connects the upper compression chamber and the first connecting chamber, and a second electronic connecting valve connects the lower compression chamber and the second connecting chamber. The connecting valve assembly connects the upper compression chamber and the lower compression chamber. The connecting valve assembly can switch between a first state and a second state. In the first state, the connecting valve assembly is unidirectionally open along the direction from the upper compression chamber to the lower compression chamber. In the second state, the connecting valve assembly is unidirectionally open along the direction from the lower compression chamber to the upper compression chamber.

8. The piezoelectric pump according to claim 7, characterized in that, The piezoelectric pump also includes a control component. The first electronic connection valve, the second electronic connection valve, and the connection valve group are all connected to the control component. The control component is configured to control the on / off state and opening value of the first electronic connection valve, the second electronic connection valve, and the connection valve group based on the first target air output of the first air output pipe and the second target air output of the second air output pipe.

9. A piezoelectric pump output control method, applied to the piezoelectric pump as described in any one of claims 1 to 8, characterized in that, The number of piezoelectric ceramic components is at least two, and the piezoelectric pump output control method includes controlling different piezoelectric ceramic components to work in turn.

10. A non-transitory computer-readable storage medium, the non-transitory computer-readable storage medium comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the piezoelectric pump output control method of claim 9.

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