Continuous flow conveying device

Abstract

The invention relates to the technical field of reaction equipment, and particularly provides a continuous flow conveying device which comprises a shell, a piezoelectric film, a partition plate, an inlet valve and an outlet valve, an outlet is formed in the surface of the shell, the partition plate is embedded in the outlet and divides the outlet into a first outlet and a second outlet, and the inner side of the shell is divided into two cavities; mounting ports and inlets are formed in the surfaces, corresponding to the two cavities, of the shell, each mounting port is covered with a piezoelectric film, each inlet is provided with an inlet valve, the inlet valves allow fluid to enter the shell in a one-way mode, the first outlet and the second outlet are each provided with an outlet valve, and the outlet valves allow the fluid to flow out of the shell in a one-way mode. By means of the innovatively-designed double-piezoelectric-film structure, efficient and stable continuous fluid conveying is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of reaction equipment, and in particular to a continuous flow conveying device. Background Art

[0002] Continuous flow synthesis technology has important application potential in the synthesis of highly active oxazolone antibacterial agents, which can improve synthesis efficiency, reduce costs and reduce environmental pollution.

[0003] In the process of continuous flow synthesis, a high-precision and high-efficiency fluid delivery system is usually required to ensure the stability of reaction conditions and the purity of products. Most existing fluid delivery systems use traditional single-diaphragm pumping structures or other mechanically driven pumping structures. Although these pumping schemes can meet the needs of general synthetic reactions, they still have defects such as insufficient accuracy and poor fluid delivery stability when dealing with high-precision flow control of trace reactants.

[0004] In order to solve the above problems, researchers have been exploring more efficient and precise pumping technologies, especially in the field of microfluidics. In recent years, piezoelectric film pumps have gradually attracted attention as a promising pumping technology. Through the deformation of piezoelectric materials under the action of electric fields, precise control of fluids can be achieved. Compared with traditional mechanical pumps, the pumping method of piezoelectric films has higher response speed and accuracy, but the existing film design still has problems such as insufficient fluid control flexibility and fluid instability caused by vibration, which cannot fully meet the demanding requirements of highly active material synthesis. Summary of the invention

[0005] In view of this, the present invention proposes a continuous flow conveying device, which aims to provide better fluid control flexibility and conveying stability by optimizing and improving the conveying structure.

[0006] The technical solution of the present invention is implemented as follows: The present invention provides a continuous flow conveying device, including: a shell, a piezoelectric film, a partition, an inlet valve and an outlet valve, an outlet is opened on the surface of the shell, the partition is embedded in the outlet and divides the outlet into a first outlet and a second outlet, and divides the inner side of the shell into two cavities, the shell surfaces corresponding to the two cavities are opened with installation ports and inlets, each installation port is covered with a piezoelectric film, each inlet is installed with an inlet valve, the inlet valve allows the fluid to enter the shell in one direction, the first outlet and the second outlet are installed with outlet valves, the outlet valve allows the fluid to flow out of the shell in one direction.

[0007] The continuous flow conveying device of the present invention realizes independent control of two cavities and precise pumping of fluid by using the dual piezoelectric film and diaphragm design, the vibration of the piezoelectric film and the separation function of the diaphragm. The specific working principle is as follows:

[0008] The two cavities of the shell are respectively covered with piezoelectric films. When voltage is applied, the piezoelectric films will produce periodic deformation, causing the fluid in the cavity to be compressed and expanded. The piezoelectric film in each cavity works independently, and the frequency and phase difference of vibration can be set separately. Therefore, when the piezoelectric film in one cavity is compressed, the film in the other cavity may be in an expanded state, thus forming a continuous fluid pumping process. The partition is installed at the outlet of the shell, dividing the outlet of the fluid into a first outlet and a second outlet, and also dividing the space inside the shell into two independent cavities. The presence of the partition allows the fluid in each cavity to be pumped independently. The fluid is pushed by the piezoelectric film in the two cavities and discharged through their respective outlet valves.

[0009] Each chamber is equipped with an inlet valve at the inlet to ensure that the fluid can only enter the housing in one direction and prevent backflow. An outlet valve is also set at each outlet. These valves allow the fluid to flow out in one direction to prevent the external fluid from flowing back into the device. The inlet valve and the outlet valve together ensure the one-way flow of the fluid to avoid backflow or pressure imbalance during pumping.

[0010] When the piezoelectric film vibrates, the fluid in the cavity is periodically compressed and released. With the cooperation of the inlet valve and the outlet valve, the fluid is driven into the cavity by the vibration of the film and discharged through the outlet. Since the two piezoelectric films can independently control the vibration phase, when the fluid in one cavity is pushed to the outlet, the other cavity may be in the stage of absorbing the fluid. Through this alternating operation, a continuous fluid output is formed, thereby improving the pumping efficiency and fluid stability of the system.

[0011] The present invention realizes independent cavity control through dual piezoelectric films, and the fluid pumping in each cavity can be adjusted individually. By adjusting the phase difference of the two films, more precise fluid flow control can be achieved to meet the precise delivery of different flow requirements. This precise control is particularly important for high-demand chemical reactions, such as the synthesis of oxazolone antibacterial agents.

[0012] The partition separates the two chambers and the outlet, avoiding the mixing and interference of the fluids in the two chambers. The fluid in each chamber flows out through an independent outlet, reducing the fluid fluctuation and turbulence during the pumping process, improving the pumping efficiency of the system and the controllability of the fluid flow. This solution can not only accurately control the pumping flow, but also has strong flexibility. It can adjust the operating frequency and phase difference of the film according to different application scenarios to adapt to different fluids and working conditions. Its compact structure is suitable for a variety of scenarios such as biomedicine, chemical synthesis, and drug development.

[0013] In some embodiments, a through hole is opened on the surface of the partition, and at least one layer of elastic film is installed to cover the through hole.

[0014] The through-holes on the partition allow the fluid to flow moderately between the two chambers, but this flow is controlled by the elastic membrane. The elastic membrane can expand and contract under the action of pressure to adjust the amount of fluid passing through the through-hole. When the pressure in one chamber increases, the fluid will push the elastic membrane through the through-hole, causing it to expand slightly, thereby allowing part of the fluid to flow to the other chamber. On the contrary, when the pressure in the chamber decreases, the elastic membrane rebounds to prevent excessive flow of the fluid. Through the expansion and contraction movement of the elastic membrane, the fluid flow between the two chambers can be dynamically adjusted. This design helps to balance the pressure in the two chambers and avoid system instability caused by excessive pressure in a single chamber. At the same time, the elastic membrane can effectively adjust the flow rate of the fluid through the through-hole when the membrane vibrates. The presence of the elastic membrane can help reduce the energy loss caused by the vibration of the membrane, concentrate more energy on fluid pumping, and thus improve the overall efficiency of the system.

[0015] In some embodiments, there are two layers of elastic membranes, a buffer cavity is formed between the two layers of elastic membranes, a buffer port is provided on one side of the buffer cavity close to the outlet, and the buffer port is located between the two outlet valves and communicated with the outside of the outlet.

[0016] The two layers of elastic membranes are spaced apart and a buffer cavity is formed between the two layers of membranes. This buffer cavity can provide additional buffer space under the fluid pressure fluctuations generated by the vibration of the piezoelectric film. When the fluid passes through the cavity during the pumping process, any sudden pressure fluctuations will be partially absorbed into the buffer cavity, thereby reducing the impact on the flow of the outlet fluid. The double-layer elastic membrane and the buffer cavity effectively absorb the instantaneous pressure fluctuations of the fluid during the pumping process. This buffering mechanism ensures that the flow rate and pressure of the fluid can remain more stable under high-frequency vibrations, which is especially suitable for precision fluid delivery scenarios that require smooth fluid output.

[0017] In some embodiments, the elastic membrane and the piezoelectric film are parallel to each other.

[0018] The elastic membrane is placed in parallel with the piezoelectric film, ensuring that the fluid is evenly distributed between the two. The vibration of the piezoelectric film generates thrust on the fluid during the pumping process, while the elastic membrane buffers the pressure fluctuations caused by the vibration through its flexible properties. The parallel configuration of the two allows the fluid to maintain a consistent flow path during the vibration process, thereby reducing irregular flow and turbulence. When the piezoelectric film vibrates, the elastic membrane can deform moderately with the pressure changes and absorb excess pressure fluctuations. Because the two are parallel, the pressure changes are more linear and controllable when the fluid passes through the elastic membrane and the piezoelectric film. The elastic membrane acts as a buffer layer to ensure that the pressure waves formed during the vibration of the piezoelectric film will not directly affect the outlet flow, thereby stabilizing the flow process of the fluid.

[0019] In some embodiments, a projection of the elastic film on the plane where the piezoelectric film is located is located inside the piezoelectric film.

[0020] The projection of the elastic membrane on the inner side of the piezoelectric film means that the active area of ​​the elastic membrane is completely within the range of action of the piezoelectric film. This ensures that when the piezoelectric film vibrates, the elastic membrane can effectively capture and buffer the pressure waves generated by the vibration. This design enables the elastic membrane to work better with the piezoelectric film, ensuring that the flow path of the fluid passing through the two diaphragms is more controllable and stable. When the piezoelectric film vibrates, the presence of the elastic membrane at the inner projection position helps to absorb excess energy and avoid excessive fluctuations or pulse effects in the fluid at the outlet. This layout design of the elastic membrane makes the behavior of the fluid under the action of the piezoelectric film more stable and reduces the reverse impact of the fluid.

[0021] In some embodiments, the elastic membrane has an area of ​​50-80% of the piezoelectric film.

[0022] When the area of ​​the elastic membrane is set to 50-80% of the area of ​​the piezoelectric film, it can cover most of the vibration area of ​​the piezoelectric film, while leaving some space for the piezoelectric film to act directly on the fluid. The elastic membrane can buffer the pressure fluctuations caused by vibration when necessary, but it will not completely cover or suppress the pumping effect of the piezoelectric film. By adjusting the area of ​​the elastic membrane, the system can ensure that the effective vibration of the piezoelectric film is transmitted to the fluid while maintaining a smooth flow of the fluid. The design of the elastic membrane not covering the entire piezoelectric film allows part of the vibration to directly affect the fluid, thereby improving the response speed and pumping efficiency of the system.

[0023] In some embodiments, the inlet valve is located between the outlet valve and the piezoelectric film on the same side of the diaphragm.

[0024] The inlet valve is located between the outlet valve and the piezoelectric film, which means that the fluid first enters the cavity of the system through the inlet valve, then undergoes the vibration of the piezoelectric film, and finally the outlet valve controls the discharge of the fluid. The vibration of the piezoelectric film is after the inlet valve, which ensures that the fluid can be fully affected by the vibration of the piezoelectric film after entering the cavity, thereby achieving efficient fluid pumping. The design of the inlet valve can ensure that the fluid can only enter the system in one direction, avoiding the backflow of the fluid during the vibration of the piezoelectric film. The outlet valve ensures that the fluid can be discharged from the system smoothly. The cooperation of the two realizes one-way flow control within the system and avoids the backflow of the fluid caused by vibration.

[0025] In some embodiments, a surface of the elastic membrane close to the piezoelectric film is provided with a plurality of spindle protrusions, the plurality of spindle protrusions are arranged in a parallel array perpendicular to the outlet opening direction, and the length direction of the spindle protrusions is parallel to the outlet direction.

[0026] The shape design of the spindle-shaped protrusion helps the fluid obtain a smoother flow path during the pumping process. The spindle-shaped profile allows the fluid to gradually accelerate and remain stable when flowing through the protrusion, reducing turbulence in the flow. The spindle-shaped design effectively disperses the pressure generated when the fluid passes through the surface of the elastic membrane, avoiding excessive local pressure or fluid retention. The spindle-shaped protrusions are arranged in a parallel array perpendicular to the outlet direction, and their length direction is parallel to the outlet direction. This arrangement ensures that the fluid can be evenly guided when flowing through the elastic membrane surface, and gradually accelerates to flow in the direction of the outlet, reducing lateral disturbances. The length direction of the spindle is parallel to the outlet direction, which helps the fluid flow naturally to the outlet along the shape of the protrusion, avoiding backflow or lateral flow of the fluid during pumping.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention achieves efficient and stable pumping of fluids through a dual piezoelectric film structure and an innovative elastic film design. The combination of the elastic film and the piezoelectric film not only provides excellent pressure buffering and vibration absorption functions, but also optimizes the flow path of the fluid through surface protrusions, effectively reducing turbulence and energy loss. The system can improve pumping efficiency while maintaining smooth fluid flow, and is particularly suitable for fluid delivery scenarios with high precision and high stability requirements, such as precision chemical synthesis and biological detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is an axonometric view of the continuous flow conveying device of the present invention;

[0031] Figure 2 It is a half-section axonometric view of the continuous flow conveying device of the present invention;

[0032] Figure 3 This is a half-section axonometric view of a continuous flow conveying device in one embodiment of the present invention in a combined state of a shell and a partition.

[0033] In the figure: 1-shell, 2-piezoelectric film, 3-partition, 4-inlet valve, 5-outlet valve, 6-elastic membrane, 11-outlet, 12-mounting port, 13-inlet, 111-first outlet, 112-second outlet, 31-through hole, 32-buffer cavity, 321-buffer port, 61-spindle protrusion. DETAILED DESCRIPTION

[0034] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the embodiments of the present invention belong. If the definitions set forth in this section are contrary to or otherwise inconsistent with the definitions set forth in the patents, patent applications, published patent applications, and other publications incorporated herein by reference, the definitions listed in this section take precedence over the definitions incorporated herein by reference.

[0039] like Figure 1 As shown, combined Figure 2-3The continuous flow conveying device of the present invention comprises: a shell 1, a piezoelectric film 2, a partition 3, an inlet valve 4 and an outlet valve 5. An outlet 11 is provided on the surface of the shell 1. The partition 3 is embedded in the outlet 11 and divides the outlet 11 into a first outlet 111 and a second outlet 112, and divides the inner side of the shell 1 into two cavities. The surfaces of the shell 1 corresponding to the two cavities are provided with mounting ports 12 and inlets 13. Each mounting port 12 is covered with a piezoelectric film 2. Each inlet 13 is provided with an inlet valve 4. The inlet valve 4 allows the fluid to enter the shell 1 in one direction. The first outlet 111 and the second outlet 112 are provided with outlet valves 5. The outlet valve 5 allows the fluid to flow out of the shell 1 in one direction.

[0040] The shell 1 has an open cavity, which is divided into two cavities by a partition 3. The two cavities have independent installation ports 12, inlets 13 and corresponding first outlets 111 or second outlets 112. The two cavities are sealed by tightly installing the piezoelectric film 2 at the installation port 12, installing the inlet valve 4 at the inlet 13 and installing the outlet valve 5 at the first outlet 111 and the second outlet 112. The piezoelectric film 2 is deformed under the piezoelectric effect, thereby changing the volume in the cavity. Through the pressure conduction of the fluid, the corresponding inlet valve 4 or outlet valve 5 is prompted to open or close, thereby achieving the corresponding fluid unidirectional driving effect.

[0041] In the single piezoelectric film pump of the prior art, only one film vibrates to pump the fluid in the cavity on both sides of the film. The phases on both sides of the film are fixed during the pumping process, and the pushing process of the fluid depends on the single vibration cycle of the film. In this mode, the control accuracy of the pumped fluid is relatively limited, the output pulse of the fluid is strong, and it is difficult to adjust flexibly. The present application adopts the design of dual piezoelectric films, and the two piezoelectric films are independently controlled, and different vibration phase differences (such as 90°, 120° or 180°) can be set. The phase difference control of the two diaphragms can more flexibly adjust the flow rate and pressure of the fluid. For example, when the two films work with a phase difference of 180°, one film compresses the fluid and the other film inhales the fluid, forming an alternating pumping effect. This mode realizes the continuous and stable output of the fluid and avoids the pulse effect. Similarly, the structural design can also achieve pulse output with different effects. For example, when a phase difference of 90°, 120° or other is used, a pulse output effect can be achieved to meet the requirements of different continuous precision synthesis.

[0042] The dual-film structure achieves alternating operation through phase difference control, and the fluid will not intermittently pause due to the cessation of single film vibration, thereby significantly reducing the instability of the fluid and ensuring that the fluid remains stable under high-frequency vibration. This phase adjustment not only improves pumping efficiency, but also allows the system to flexibly adjust output according to fluid demand and adapt to different working conditions.

[0043] At the same time, the pumping pressure and flow of a single piezoelectric diaphragm pump are limited by the thrust capacity of a single diaphragm. Due to the limited vibration amplitude of the piezoelectric film, a single diaphragm is difficult to provide sufficient pressure, especially when dealing with high-viscosity fluids or high-pressure pumping, the efficiency is low. The dual-diaphragm design can provide pumping force from two diaphragms at the same time. The piezoelectric films on both sides work together to produce greater fluid pressure and flow output. Especially when the two diaphragms work in a synchronous or almost synchronous manner, the total pumping pressure and flow are significantly improved.

[0044] The dual-diaphragm design is equivalent to "parallel connection" of the pumping capacity, which doubles the system's pressure source and the stability of the fluid output. This parallel effect makes the dual piezoelectric membrane pump more suitable for applications that require high flow and high pressure, especially when dealing with fluids with high viscosity, the pumping efficiency is significantly improved.

[0045] The vibration of a single piezoelectric film can easily cause fluid turbulence and instability during the pumping process. Especially in the case of high-frequency vibration, a single vibration mode will cause uneven pressure distribution inside the fluid, resulting in flow turbulence and energy loss. The dual piezoelectric film structure achieves more uniform fluid push during the vibration process through the coordinated work of two films. In particular, by adjusting the phase difference, the fluid can be prevented from being subjected to excessive pressure changes within a pumping cycle, the disturbance inside the fluid can be reduced, and the turbulence phenomenon can be significantly reduced. When the two films vibrate alternately, the flow path of the fluid is more continuous and smooth, and there will be no flow interruption or turbulence due to the pulse effect caused by a single film. In this way, the dual film structure can not only reduce turbulence, but also effectively reduce energy loss in the system, ensuring that more energy is used to push the fluid rather than consumed in fluid disturbance.

[0046] Due to the limitation of a single vibration cycle, a single diaphragm pump is prone to fluid backflow when the diaphragm retracts. This is because there is no other force source to maintain the unidirectional flow of the fluid during the vibration of the diaphragm, which may cause some fluid to reverse flow at the outlet. In the dual-diaphragm design, the alternating operation of the two diaphragms provides a more stable fluid push, especially when the phase difference is 180°, one diaphragm is in the pumping stage, and the other diaphragm is responsible for sucking in the fluid, which can effectively avoid fluid backflow. At the same time, the valve design in the dual-diaphragm system can also maintain the unidirectional flow of the fluid under the coordinated action of the dual membranes.

[0047] In some embodiments, a through hole 31 is opened on the surface of the partition 3 , and at least one layer of elastic membrane 6 is installed to cover the through hole 31 .

[0048] The elastic membrane 6 is made of elastic material. After the partition 3 is perforated and covered with the elastic membrane 6, the presence of the channel allows the fluid to flow limitedly between the two cavities, and the elastic membrane 6 plays a role of regulation and buffering. The flexible characteristics of the elastic membrane 6 can expand and contract according to the pressure difference between the two cavities, thereby alleviating instantaneous pressure difference fluctuations. When a piezoelectric film 2 vibrates and compresses the fluid, the elastic membrane 6 can absorb part of the excessive pressure fluctuations to avoid drastic changes in the pressure in the cavity, so that the fluid passes through the outlet more smoothly. In a single-film or double-film pumping structure, vibration can easily lead to instantaneous fluctuations in fluid pressure, thereby causing fluid instability and turbulence, especially in high-frequency pumping, this fluctuation effect is more significant. The design of perforating and covering the elastic membrane 6 allows a small amount of fluid to pass through the partition and buffer, effectively absorbs and disperses pressure difference fluctuations, reduces the instability of the fluid during the pumping process, and improves the stability of the pumping process. The flexibility and adjustability of the elastic membrane 6 enable it to respond to pressure changes and automatically adjust the rate at which the fluid passes through the channel, thereby helping to maintain the pressure balance of the system. Through this regulation, the system is prevented from being damaged by fluid backflow or excessive pressure difference. The addition of the elastic membrane 6 not only reduces pressure fluctuations, but also prevents fluid backflow. It acts as a dynamic regulating valve, allowing the two chambers to always maintain a relatively balanced pressure state, reducing the unevenness during the pumping process.

[0049] In some embodiments, there are two layers of elastic membrane 6 , and a buffer cavity 32 is formed between the two layers of elastic membrane 6 . A buffer port 321 is provided on one side of the buffer cavity 32 close to the outlet 11 . The buffer port 321 is located between the two outlet valves 5 and communicates with the outside of the outlet 11 .

[0050] The structural design of the double-layer elastic mold 6 can provide a better buffer space for the fluid, and the instantaneous pressure fluctuations of the fluid during the pumping process can be effectively absorbed and alleviated. The buffer cavity adjusts the pressure fluctuations through the deformation of the elastic membrane 6 to avoid the fluid from being directly impacted by vibration. This is especially significant when working at high frequency vibration or high pressure. This design absorbs fluctuations through the buffer cavity 32, improves the stability of the fluid output, avoids fluid turbulence at the outlet, significantly reduces the pulse effect, and improves the uniformity of pumping. Through the design of the buffer cavity 32 and the buffer port 321, the backflow problem of the fluid is effectively controlled, and the overall pumping efficiency is improved. In some high-pressure pumping scenarios, the fluid pressure fluctuates greatly, which can easily cause the system to overload or damage. The design of the buffer cavity 32 enhances the system's adaptability to pressure fluctuations and reduces the loss of the system under high-pressure conditions.

[0051] In some embodiments, the elastic film 6 and the piezoelectric film 2 are parallel to each other.

[0052] The elastic membrane 6 and the piezoelectric film 2 are arranged parallel to each other, ensuring that when the piezoelectric film 2 vibrates, the elastic membrane 6 can respond synchronously, thereby better coordinating the transmission of vibration energy. Since the two are parallel, the thrust generated by the piezoelectric film and the buffering effect of the elastic membrane 6 can be concentrated in the same direction, effectively avoiding the dispersion of vibration and energy waste. If the elastic membrane 6 is not parallel to the piezoelectric film 2, the vibration may be dispersed in different directions, resulting in reduced fluid pushing efficiency. The parallel layout can ensure the maximum utilization of energy and improve pumping efficiency. A better vibration coordination effect can be formed between the elastic membrane 6 and the piezoelectric film 2 in the parallel layout. When the piezoelectric film 2 vibrates, the elastic membrane 6 can synchronously buffer and adjust the vibration frequency. Through this design, the system can respond to changes in vibration frequency more flexibly and maintain higher system stability.

[0053] In some embodiments, the projection of the elastic film 6 on the plane where the piezoelectric film 2 is located is located inside the piezoelectric film 2 .

[0054] In the above embodiments, when the projection of the elastic membrane 6 is located on the inner side of the piezoelectric film 2, the main area of ​​vibration of the piezoelectric film 2 can directly act on the fluid, while the elastic membrane 6 is responsible for providing additional buffering on the inner side. This design enables the piezoelectric film 2 to play its main pumping function, while the elastic membrane 6 effectively buffers excessive pressure fluctuations. If the elastic membrane completely covers the piezoelectric film, the vibration effect of the piezoelectric film may be weakened and the pumping efficiency may be reduced. Through the inner projection design, the system can ensure accurate vibration transmission and improve the accuracy of fluid control. The design of the elastic membrane 6 on the inner side of the piezoelectric film 2 ensures that the elastic membrane does not interfere too much with the vibration mode of the piezoelectric film. The piezoelectric film 2 can still effectively generate vibration thrust, and the elastic membrane 6 only buffers the fluid when necessary to ensure the smooth output of the fluid.

[0055] In some embodiments, the area of ​​the elastic film 6 is 50-80% of the area of ​​the piezoelectric film 2 .

[0056] In the above embodiments, when the area of ​​the elastic membrane 6 is 50-80% of the piezoelectric film 2, it can cover most of the vibration area of ​​the piezoelectric film 2, but not completely. This means that the vibration energy of the piezoelectric film 2 can still act directly on the fluid, while the buffering effect of the elastic membrane 6 only works when necessary to avoid excessive interference. If the area of ​​the elastic membrane is too large, it may weaken the pumping effect of the piezoelectric film 2 and reduce the pumping efficiency. If the area is too small, it cannot effectively buffer the fluctuations of the fluid. An area ratio of 50-80% can provide moderate buffering while ensuring pumping efficiency, balancing efficiency and stability.

[0057] In some embodiments, the inlet valve 4 located on the same side of the diaphragm 3 is located between the outlet valve 5 and the piezoelectric film 2 .

[0058] In traditional designs, if the position of the inlet valve 4 is unreasonable, it may cause fluid backflow or reflux during vibration. By locating the inlet valve 4 between the outlet valve 5 and the piezoelectric film 2, the system effectively prevents backflow, improves pumping efficiency and the accuracy of fluid control. The inlet valve 4 is set between the outlet valve 5 and the piezoelectric film 2 to ensure that the fluid can enter the cavity in a unidirectional manner in a smoother manner during the pumping process and be pushed to the outlet by the piezoelectric film. This layout can effectively prevent the fluid from flowing back or stagnating during vibration, ensuring the reliability of unidirectional flow.

[0059] In some embodiments, a surface of the elastic membrane 6 close to the piezoelectric film 2 is provided with a plurality of spindle protrusions 61 , which are arranged in a parallel array perpendicular to the opening direction of the outlet 11 , and the length direction of the spindle protrusions 61 is parallel to the direction of the outlet 11 .

[0060] In the above embodiments, the spindle-shaped structure of the spindle protrusion 61 helps to guide the fluid to flow smoothly along the contour of the protrusion. The spindle-shaped design reduces the lateral disturbance of the fluid when passing through the elastic membrane, ensures that the fluid flows smoothly along the direction of the outlet 11, and reduces the generation of turbulence. During the pumping process, the fluid is prone to irregular flow or turbulence on the surface without a guiding structure. By arranging the spindle protrusion on the surface of the elastic membrane, the fluid is effectively guided, the turbulence is reduced, and the stability of the fluid is improved. The length direction of the spindle protrusion 61 is parallel to the direction of the outlet 11, which means that the fluid is guided along the direction of the protrusion, the flow path is smoother, and the energy loss is reduced. The fluid accelerates the flow in the outlet direction, which helps to improve the pumping efficiency. If the fluid is subjected to irregular resistance or deviates from the flow direction during the pumping process, energy will be wasted, reducing the pumping efficiency of the system. Through the reasonable guidance of the spindle protrusion, the fluid flows along the outlet direction, reducing resistance and improving the overall efficiency.

[0061] The spindle-shaped protrusion can disperse the pressure when the fluid flows through, avoiding the formation of excessive pressure concentration in certain areas. This distributed pressure can reduce the impact on the diaphragm and other system components, and enhance the stability of the fluid flow. Without reasonable fluid guidance and pressure dispersion, the fluid flow may produce local high pressure and affect the stability of the system. Through the design of the spindle protrusion, the pressure can be evenly distributed, and the stability and durability of the system are improved.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous flow conveying device, characterized in that: include: A shell (1), a piezoelectric film (2), a partition (3), an inlet valve (4) and an outlet valve (5); an outlet (11) is provided on the surface of the shell (1); the partition (3) is embedded in the outlet (11) and divides the outlet (11) into a first outlet (111) and a second outlet (112), and divides the inner side of the shell (1) into two cavities; the surfaces of the shell (1) corresponding to the two cavities are provided with mounting ports (12) and inlets (13); each mounting port (12) is covered with a piezoelectric film (2); each inlet (13) is provided with an inlet valve (4); the inlet valve (4) allows fluid to enter the shell (1) in one direction; the first outlet (111) and the second outlet (112) are provided with outlet valves (5); the outlet valves (5) allow fluid to flow out of the shell (1) in one direction.

2. The continuous flow conveying device according to claim 1, characterized in that: A through hole (31) is provided on the surface of the partition plate (3), and at least one layer of elastic membrane (6) is installed and covered on the through hole (31).

3. The continuous flow conveying device according to claim 2, characterized in that: The number of the elastic membranes (6) is two layers, and a buffer cavity (32) is arranged between the two layers of the elastic membranes (6). A buffer port (321) is arranged on a side of the buffer cavity (32) close to the outlet (11), and the buffer port (321) is located between the two outlet valves (5) and communicates with the outside of the outlet (11).

4. The continuous flow conveying device according to claim 2, characterized in that: The elastic film (6) and the piezoelectric film (2) are parallel to each other.

5. The continuous flow conveying device according to claim 4, characterized in that: The projection of the elastic film (6) on the plane where the piezoelectric film (2) is located is located inside the piezoelectric film (2).

6. The continuous flow conveying device according to claim 5, characterized in that: The area of ​​the elastic film (6) is 50-80% of the area of ​​the piezoelectric film (2).

7. The continuous flow conveying device according to claim 2, characterized in that: The inlet valve (4) located on the same side of the partition (3) is located between the outlet valve (5) and the piezoelectric film (2).

8. The continuous flow conveying device according to claim 7, characterized in that: A plurality of spindle protrusions (61) are provided on a surface of one side of the elastic membrane (6) close to the piezoelectric film (2). The plurality of spindle protrusions (61) are arranged in a parallel array in a direction perpendicular to the opening direction of the outlet (11), and the length direction of the spindle protrusions (61) is parallel to the direction of the outlet (11).

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