109 results about "Piezoelectric pump" patented technology

The invention relates to the technical field of piezoelectric pump, in particular to a multi-vibrator connected piezoelectric pump, an operating method and an application device, comprising a pump body and piezoelectric vibrators arranged in the pump body for fluid transmission. In the invention, a plurality of pump cavities are arranged in the pump body, the piezoelectric vibrator is arranged in each pump cavity, the plurality of piezoelectric vibrators are concentrated into the pump body, and the pump cavities are connected in series or parallel or in series and parallel, so that the pump body can provide large output flow and higher output pressure and greatly reduce the volume of the pump at the same output capacity, facilitating the miniaturization design of the product.

The invention provides a medical piezoelectric pump and a control method thereof, and relates to the medical field, and the medical piezoelectric pump comprises a pump body, a piezoelectric vibrator and a valve body; the pump body comprises an inner cavity, an inlet flow channel and an outlet flow channel, the inlet flow channel and the outlet flow channel are communicated with the inner cavity, the valve body is arranged on the inlet flow channel and the outlet flow channel so that the inlet flow channel and the outlet flow channel can be opened alternately, and a piezoelectric vibrator used for sealing the inner cavity is arranged on the pump body. The medical piezoelectric pump further comprises a first monitoring assembly and / or a second monitoring assembly, the first monitoring assembly is arranged in the inner cavity, the first monitoring assembly and the piezoelectric vibrator are oppositely arranged in a spaced mode, the second monitoring assembly is arranged on the valve body, and the first monitoring assembly and / or the second monitoring assembly are / is used for monitoring the flow of fluid and are / is in communication connection with the piezoelectric vibrator. According to the medical piezoelectric pump, the output precision of pumped fluid can be accurately controlled.

A negative pressure wound therapy system includes a wound dressing, at least one pump fluidly coupled to the fluid interface, a pressure sensor fluidly coupled to the wound dressing, a control housing, and an electrical coupler. The wound dressing includes a sealing layer, an absorbent layer adjacent to the sealing layer, and a fluid interface attached to at least one of the sealing layer or the absorbent layer. The at least one pump is configured to apply negative pressure to the fluid interface to draw fluid from the wound dressing via the fluid interface. The pressure sensor is configured to detect a fluid pressure of the wound dressing. The control housing is remote from the wound dressing. The electrical coupler is configured to removably connect the control housing to the at least one pump.

The utility model relates to the technical field of piezoelectric pumps, in particular to a novel fluid conveying device, which is characterized in that a vibration component is matched with a pump seat groove to define a pump cavity, the pump cavity is communicated with the outside through a pump inlet and a pump outlet which are arranged on a pump seat, and a first one-way valve and a second one-way valve are respectively arranged at the pump inlet and the pump outlet. The circulation holes in the first one-way valve and the second one-way valve are of a porous structure, and the pumping capacity of the fluid conveying device can be improved by increasing the total length of the edges of the circulation holes compared with a single-hole design with the same area. The fluid conveying device adopts a single-pump-cavity design, so that the overall size of the pump body can be obviously reduced, the pump inlet and the pump outlet are formed in the pump base and are provided with the first one-way valve and the second one-way valve respectively, and effective pumping-in and pumping-out of fluid in the same pump cavity are achieved; the fluid path is simplified, meanwhile, the turning process of the fluid is reduced, and therefore energy loss in the fluid pumping process is reduced.

The invention provides a suction head and a conveying device. A suction head (100) is provided with: a main body section (10) having a suction hole (11) for sucking a suction object (1); a piezoelectric pump (20) which is provided inside or on the surface of the main body part (10) and which generates an attractive force when energized; and a drive circuit (30) for driving the piezoelectric pump (20). A suction path (13) connecting the suction hole (11) and the piezoelectric pump (20) is provided inside the main body (10).

The invention relates to the technical field of communication, in particular to an adjusting method, device and equipment for the driving frequency of a piezoelectric pump and a computer readable storage medium. The method comprises the following steps: starting from an initial driving frequency, adjusting the driving frequency of the piezoelectric pump according to a first adjustment step length, determining the input power when the piezoelectric pump is driven after each frequency adjustment, and stopping until the input power exceeds a coarse screening threshold value; starting from the driving frequency corresponding to the interruption, adjusting the driving frequency of the piezoelectric pump according to a second adjustment step length, and determining the input power when the piezoelectric pump is driven after each frequency adjustment until the input power corresponding to the adjusted driving frequency is smaller than the input power corresponding to the driving frequency before adjustment after any time of adjustment; wherein the second adjustment step length is smaller than the first adjustment step length; and determining the driving frequency before any adjustment as a target driving frequency, and driving the piezoelectric pump at the target driving frequency.

The piezoelectric pump comprises a shell, a metal substrate and a piezoelectric ceramic actuator, and the shell is provided with a fluid inlet and a fluid outlet; the fluid inlet is provided with a first reverse resistance structure, and the fluid outlet is provided with a second reverse resistance structure.

The invention discloses a drug-coated prostate balloon dilatation catheter control system, relates to the technical field of medical instruments, and aims to solve the technical problems of uncontrollable drug release, extensive dilatation process and lack of quantitative evaluation in existing drug balloon therapy. The system integrates a high-precision pressure sensing module, a micro piezoelectric pump control module, a man-machine interaction module and a data processing module. The system carries out real-time closed-loop control on the internal pressure of the balloon through a self-adaptive PID algorithm, and precise execution of a preset pressure curve is achieved. The innovation of the method lies in that a drug release quantitative estimation model based on pressure-time integration (AUC) is created for the first time, the model can calculate and display the estimated drug release amount in the treatment process in real time, and physical operation parameters are directly associated with biological effects; the device has the effects of realizing accurate and constant control of the dilatation pressure and improving the operation safety.

This application provides a triboelectric self-sensing piezoelectric pump for drug delivery, a flow monitoring device, and a method, relating to the field of fluid transport and flow monitoring. A first friction part of a triboelectric sensor is disposed on an actuating component, and a second friction part is disposed on the inner wall of the pump body. When the actuating component vibrates to control the change in pump chamber volume, driving liquid to flow out through the inlet channel and pump chamber from the outlet channel, the first friction part passively follows the actuating component in synchronous vibration, synchronously changing the gap between the first and second friction parts. An electrical signal corresponding to the vibration of the actuating component is output from the second friction part, and this electrical signal can be calibrated as the corresponding liquid flow rate. This enables long-term, continuous, and accurate flow monitoring of wearable piezoelectric pumps, thereby improving the drug delivery safety and control accuracy of wearable piezoelectric pumps used in medical applications.

The invention relates to the technical field of piezoelectric pumps, in particular to a high-output-performance micro piezoelectric pump which comprises a pump body, an ultrasonic actuator which is arranged in the pump body and divides a pump cavity into a first cavity and a second cavity, and a first air inlet channel, a first air outlet channel, a second air inlet channel and a second air outlet channel which communicate with the two cavities correspondingly. A series connection piece is arranged between the first air outlet channel and the second air inlet channel, so that the two cavities are connected in series to improve the output pressure; or a parallel connecting piece is arranged between the first air outlet channel and the second air outlet channel, so that the two cavities are connected in parallel to improve the output flow. The double independent cavities are arranged in the single pump body and matched with a selectable series-parallel connection structure, so that the output pressure or flow of the pump is increased under the condition that the overall size is not increased, the miniaturization design of products is facilitated, meanwhile, the flow channel resistance is reduced, and the transmission efficiency is improved.

Improved respirator fit test devices including piezoelectric pumps that reduce noise and vibration of the device. The devices may include two or more piezoelectric pumps, wherein a first pump moves sheath air through a differential mobility analyzer and a second pump alternately moves aerosol from inside or outside a respirator through the differential mobility analyzer. A size selected portion of each aerosol sample is then moved through a condensation nuclei counter. Control circuitry enables user selection of a respirator type to be tested, wherein the differential mobility analyzer may be enabled or disabled based on the user selection. The control circuitry further enables calculation of a fit factor corresponding to a quantitative effectiveness of the respirator fitting a user based on signals from the condensation nuclei counter for each aerosol sample.

The invention discloses an industrial personal computer heat dissipation assembly and an industrial personal computer, and relates to the technical field of industrial computers.The industrial personal computer heat dissipation assembly comprises an industrial personal computer body, a circuit board is arranged in the industrial personal computer body, and a heating element and a circuit groove are distributed on the surface of the circuit board. The track groove part is arranged along the periphery of the heating element, the heat blind areas of the element body and the pins are covered by the containing groove and the copper foil heat-conducting sheet, hidden heat of the pins is pre-attracted in advance, instant heating and aging of welding spots after startup are avoided, the core space is not occupied by means of the element gap design, and high-density circuit board layout is adapted. The composite structure of the copper alloy ball core, the paraffin-based phase change material layer and the porous ceramic outer layer of the heat absorption ball can efficiently capture heat and prevent dust from invading, so that the local temperature can be obviously reduced through single heat absorption, and the problem that a traditional cooling fin cannot fully cover a high-heat-flux element due to volume limitation is solved.

The invention provides an airflow heat dissipation device of a micro piezoelectric pump, and relates to the technical field of micro electro mechanical systems. An inlet runner arranged on the lower end face of a flow guide part and an outlet runner arranged on the upper end face of the flow guide part are both communicated with a flow guide channel arranged on the flow guide part, and the cross sectional area of the outlet runner is gradually reduced in the direction from the first end to the second end of the outlet runner. The PZT piezoelectric layer is arranged on the upper end face of the flow guide part and provided with a pump film corresponding to the flow guide channel, and the first electrode can drive the pump film to move up and down. The airflow heat dissipation device of the micro piezoelectric pump is suitable for heat dissipation operation of micro components and large-scale integrated circuit systems, and ensures that the temperature of the components and the operating environment of the systems is stable.

The invention relates to a piezoelectric wafer pump, and belongs to the technical field of piezoelectric pumps, the piezoelectric wafer pump comprises a piezoelectric actuator and a plurality of groups of double-cavity diaphragm pumps driven by the piezoelectric actuator, the piezoelectric actuator comprises a comb finger type resonator, a bolt connector and a screw connector, the comb finger type resonator comprises a cross beam and a plurality of driving arms distributed on the top surface of the cross beam at equal intervals, the bolt connector is arranged on the driving arm located on the outermost side, and the screw connector is arranged on the driving arm located on the inner side. The double-cavity diaphragm pump is positioned between two adjacent driving arms and is suspended above the top surface of the cross beam; piezoelectric patches are horizontally arranged on the top face and the bottom face of the cross beam and the bottom ends of the two side faces of the driving arm in pairs, and all the piezoelectric patches are connected in series or in parallel. The comb finger type driver is adopted to drive the multiple sets of double-cavity diaphragm pumps, only one driving power source is needed, the complexity and the control requirement of the driving power source needed by the multi-pump-body resonant piezoelectric pump can be effectively lowered, and the output performance and the working reliability are improved.

The invention discloses a floating annular diaphragm valve piezoelectric pump which comprises a pump body, a pump cover, an upper sealing ring, a piezoelectric vibrator, a lower sealing ring, a valve seat, an annular diaphragm valve, a bolt and a nut. When liquid passes through the annular diaphragm valve in the pump body, the annular diaphragm valve floats up and down in the cylindrical rod of the valve seat under the impact force of the liquid so as to be attached to or deviated from the fan-shaped thin hole of the valve seat, and then inflow and outflow of the liquid are controlled. The annular diaphragm valve can work by floating up and down under very small liquid impact force, so that the pump is large in output flow and not prone to fatigue failure, and meanwhile, the annular diaphragm valve is of a plane structure and is easy to microminiaturize.

An implantable fluid-operated device includes a rechargeable battery, a non-rechargeable battery, at least one capacitor, and a first piezoelectric pump for transferring fluid from the fluid reservoir to the inflatable member. A waveform of electrical energy is provided from the rechargeable battery to a piezoelectric element of the first piezoelectric pump to drive the first piezoelectric pump to pump fluid from the fluid reservoir to the inflatable member. The at least one capacitor is charged in response to a voltage generated by the piezoelectric element when the piezoelectric element returns to its neutral shape from a deformed shape. The provision of electrical energy to different groups of electrical circuits in the devices is controlled based on a state of charge of, for example, the at least one capacitor and the rechargeable battery.

This application discloses a piezoelectric pump, a gas circulation mechanism, and a circulation device. The circulation device includes a piezoelectric pump or a gas circulation mechanism. The piezoelectric pump includes at least one set of sub-pumps. Each sub-pump includes a housing and a vibration assembly. The housing includes a receiving cavity, at least one air inlet channel, and at least one combined air outlet channel communicating with the receiving cavity. The receiving cavity is connected to an external space through the air inlet channel and the combined air outlet channel. A dispersion structure is provided on the cavity wall of the receiving cavity. The vibration assembly is disposed in the receiving cavity, and the dispersion structure is used to disperse the reflected airflow from the cavity wall of the receiving cavity when the vibration assembly vibrates. The piezoelectric pump in this application can reduce operating noise and its own size, thereby meeting the user's dual requirements for quiet operation and lightweight design when using the circulation device.

The application discloses a multi-cavity disc type piezoelectric gas pump which is combined by a multi-cavity disc type piezoelectric gas pump assembly, wherein the assembly comprises a partition plate, an upper pump body, a piezoelectric vibrator, a lower pump body and a one-way valve sheet; the upper pump body is the same as or opposite to the lower pump body; the piezoelectric vibrator divides the upper and lower pump bodies into two cavities; each cavity is provided with an outlet vent and an inlet vent; the quadrant holes of the pump body are communicated through the vent flow channels; after assembly, the quadrant holes of the pump body form a gas inlet and outlet channel; the first and second vent flow channels are arranged at an angle of 90 degrees and are communicated with two adjacent quadrant holes respectively; during assembly, the angle of the upper and lower pump bodies is adjusted, the partition plate is used to open and close the gas channel formed by the quadrant holes of the pump body, and various multi-cavity disc type piezoelectric gas pumps in series connection, parallel connection or series-parallel connection are assembled; the gas outlet and the gas inlet can be converted with each other; the vent is provided with a skirt structure which can isolate and separate the high-pressure area and the low-pressure area, thereby improving the flow of the product.

A piezoelectric pump, for causing the flow of a liquid, including a piezoelectric member driven by applying a voltage, a diaphragm which is deformed by the driving of the piezoelectric member, an adhesive member which bonds the piezoelectric member and the diaphragm together, and an urging member that urges the piezoelectric member toward the diaphragm.

1. Name of the product in this design: Piezoelectric pump. 2. Application of this design: This design is used for conveying fluid media. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention discloses a two-phase liquid cooling device and method based on a diamond copper micro-channel and piezoelectric atomization, the device comprises a chip assembly, a phase change cavity assembly, a heat conduction assembly and a jet flow assembly, the chip assembly comprises a high-power chip and a thermal interface material layer; the phase change cavity assembly comprises a heat dissipation substrate and a sealing cover, and a phase change cavity is defined by the heat dissipation substrate and the sealing cover. The heat conduction assembly comprises a diamond copper composite material compact layer and a diamond copper composite material porous layer. The jet flow assembly comprises a nozzle, a liquid storage tank, a piezoelectric pump, a piezoelectric drive and controller and a radiator. The heat conductivity coefficient, boiling stability, device integration and device compatibility of the two-phase liquid cooling device are improved.

Vehicle seat system, comprising a vehicle seat and a pneumatic system (1) having the following components: at least one fluid actuator (4), preferably accommodated in the vehicle seat, a plurality of piezoelectrically operated pumps (11 - 41, 12 - 42), a common piping system (L), via which the piezoelectric pumps (11 - 41, 12 - 42) are in fluid communication with one another and with the at least one fluid actuator (4), so that the pumps (11 - 41, 12 - 42) can be controlled in such a way that they influence the fluid pressure and / or the fluid flow in the line system (L) and thus the fluid pressure in the at least one fluid actuator (4) and / or the fluid flow into or out of the at least one fluid actuator (4).

A mixed-fluid delivery device includes a piezoelectric pump that includes a piezoelectric vibrator having a piezoelectric element and a vibrating plate and a pump cabinet and discharges a fluid, and a case body including a pump housing chamber, a liquid reservoir portion, a mixing portion that generates a mixed fluid, a nozzle portion through which the gas discharged from the piezoelectric pump is ejected to the mixing portion, and a conducting portion that conducts a liquid toward the mixing portion. The case body has a reflux path through which a residual liquid that remains in the mixing portion without being delivered to the outside is returned to the liquid reservoir portion. The reflux path is provided so as to be in contact with at least a portion of the pump cabinet.

The invention discloses an adsorption device and an adsorption method of the adsorption device, and relates to the technical field of workpiece adsorption. The adsorption device comprises: a valved piezoelectric pump; a valveless piezoelectric pump; the adsorption part is provided with a workpiece adsorption opening and a vacuum chamber which are communicated; the first air suction port and the second air suction port can be communicated with the vacuum chamber respectively and can be used for vacuumizing the vacuum chamber respectively or jointly; the first air path control unit is arranged at a communication node of the first air suction port, the vacuum chamber and the atmosphere and can enable the vacuum chamber to be selectively communicated with the first air suction port or the atmosphere; and the second air path control unit is arranged at a communication node of the second air suction port, the vacuum chamber and the atmosphere, and can enable the vacuum chamber to be selectively communicated with the second air suction port or the atmosphere or the closed pipeline. The adsorption device is used for avoiding the defects of a valveless piezoelectric pump and a valveless piezoelectric pump, and the vacuum degree of the vacuum chamber is ensured while the negative pressure environment is rapidly established.

The invention discloses a control method and device for an electric breast pump and the electric breast pump, and the control method applied to the electric breast pump comprises the steps: responding to a first mode instruction, controlling a vacuum pump to operate so as to reduce the air pressure of an inner cavity of a breast suction cover, and monitoring the real-time air pressure value of the inner cavity; when the real-time air pressure value reaches a first target air pressure threshold value, a working mode instruction input by a user is obtained, and the working mode instruction comprises a working mode identifier; when the working mode identifier corresponds to a second working mode, the vacuum pump is controlled to stop running, and the piezoelectric pump is started to run in a first preset mode; and when the working mode identifier corresponds to a third working mode, the vacuum pump and the piezoelectric pump are controlled to operate according to a preset cooperative mode. By the adoption of heterogeneous combination of the vacuum pump and the piezoelectric pump and dynamic switching logic based on the negative pressure threshold value, efficient pressure building, powerful suction and mute operation of the breast pump can be achieved at the same time.

The utility model discloses a square high-flow high-pressure piezoelectric air pump with an inlet provided with a Tesla valve, which belongs to the technical field of micro piezoelectric pumps and comprises a partition plate I, a pump body I, a pump body II, a partition plate II and a guide plate which are of square plate-shaped structures and fixedly connected in sequence from top to bottom. The pump body II and the pump body I are similar in structure and are oppositely arranged, and a piezoelectric vibrator is arranged between the pump body II and the pump body I and divides a pump body cavity into two parts; the pump body I and the pump body II are each provided with a first quadrant hole, a second quadrant hole, a third quadrant hole, a fourth quadrant hole, an air inlet, an air outlet, a cavity, an air inlet Tesla runner and an air outlet runner. The air outlet is located in the center of the cavity and provided with a one-way valve with the air outlet direction facing outwards. The air inlet Tesla flow channel is of a symmetrical parallel Tesla valve structure and has a one-way conduction effect; the pump body I and the pump body II can realize two working modes of series connection pressure increase and parallel connection flow increase of the two pump cavities by changing the relative assembly connection positions.

The utility model provides a piezoelectric pump and wearable equipment. The piezoelectric pump includes pump shell, piezoelectric actuator, first valve piece and second valve piece. Pump shell is equipped with first to fourth gas port and the first groove body of intercommunication first gas port, the second groove body of intercommunication third gas port, piezoelectric actuator divides the first working chamber and the second working chamber in the cavity of pump shell and can produce gas driving force, first valve piece is located in the first working chamber and covers the first groove body, and the edge of first valve piece is tightly connected with the inner wall of pump shell and is equipped with the first through -hole of the misplacement setting of first groove body, and the first gas cavity of intercommunication second gas port is formed between first valve piece and piezoelectric actuator, second valve piece is located in the second working chamber and covers the second groove body, and the edge of second valve piece is tightly connected with the inner wall of pump shell and is equipped with the second through -hole of the misplacement setting of second groove body, and the second gas cavity of intercommunication fourth gas port is formed between second valve piece and piezoelectric actuator, and pump shell is further equipped with the first gas -blocking structure of corresponding first valve piece and the second gas -blocking structure of corresponding second valve piece.

A system for negative-pressure therapy is described. The system includes a dressing configured to be positioned adjacent a tissue site and a piezoelectric pump having at least one inlet and at least one outlet. An adapter is coupled to the piezoelectric pump and configured to be fluidly coupled to the dressing. The adapter is configured to aggregate fluid flow into the at least one inlet. The adapter can have a block. A first recess depends into the block, and a second recess depends into the block from the first recess, the second recess having an area less than the area of the first recess. A bore depends through the block from the second recess to the first side, and a conduit is coupled to the first side and fluidly coupled to the bore.

This invention relates to the field of electronic equipment technology and discloses a piezoelectric pump cooling device, comprising: a piezoelectric fluid pump and a heat conductor. The piezoelectric fluid pump has a piezoelectric drive assembly and an air inlet and an air outlet connected to each other. The heat conductor has an air inlet and a heat dissipation channel. The heat conductor is connected to the piezoelectric fluid pump, and the air inlet, heat dissipation channel, air inlet, and air outlet are sequentially connected. The piezoelectric drive assembly can drive fluid to flow from the air inlet to the air outlet. The outer wall of the heat conductor has a heat-conducting part for connecting to a heat source. This invention can prevent the discharged heat from returning to the piezoelectric pump cooling device, ensuring good heat exchange and significant cooling effect on the equipment.