156 results about "Piezoelectric pump" patented technology

According to the thin forced air cooling piezoelectric pump for chip heat dissipation, the air inlet channel and the air outlet channel are separated from each other, the heat dissipation effect is good, meanwhile, noise is smaller, the size is small, and the thin forced air cooling piezoelectric pump can be flexibly integrated into various chip heat dissipation scenes with limited space. The piezoelectric pump structurally comprises a shell assembly and a piezoelectric ceramic assembly, a piezoelectric pump working cavity is formed in the shell assembly, the pressure in the piezoelectric pump working cavity can be changed through deformation of the piezoelectric ceramic assembly, and the piezoelectric pump working cavity communicates with an air inlet and an air outlet through an air inlet flow channel and an air outlet flow channel correspondingly; the air inlet and the air outlet are not located in the same end of the shell assembly, an air inlet piece assembly is installed at the joint of the air inlet flow channel and the piezoelectric pump working cavity, and an air outlet piece assembly is installed at the joint of the air outlet flow channel and the piezoelectric pump working cavity.

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.

A piezoelectric pump and an electronic device, relating to the technical field of heat dissipation. The piezoelectric pump (10) comprises a plate body (1101), a piezoelectric layer (1102) and a first housing (12), the plate body (1101) and the piezoelectric layer (1102) being stacked, the plate body (1101) being fixedly connected to the first housing (12), the first housing (12) having a first recessed cavity (121), and the plate body (1101) covering the first recessed cavity (121). In the stacking direction, the piezoelectric pump (10) has a connection hole (111) which passes through the plate body (1101) and the piezoelectric layer (1102), a first end (111a) of the connection hole (111) extending into the first recessed cavity (121). The first housing (12) is provided with a first through hole (122), one end of the first through hole (122) extending into the first recessed cavity (121). The vertical projection of the first through hole (122) in the stacking direction does not overlap with the vertical projection of the connection hole (111) in the stacking direction.

The utility model relates to an integrated piezoelectric pump, which belongs to the technical field of piezoelectric pumps, solves the problem of insufficient integration level and compatibility in the prior art, and comprises a pump body, the pump body comprises a top radiating plate, a runner plate, a resonant plate, an outer frame with an embedded vibrator and an electrode plate which are assembled from top to bottom; the valve body is mounted below the pump body and comprises a first fixing layer, an elastic film layer and a second fixing layer which are assembled from top to bottom, a side wall part for fixedly mounting the first fixing layer, the elastic film layer and the second fixing layer, and a bottom base plate which is fixed to the bottom surface of the side wall part and serves as a bottom plate of the valve body; wherein the bottom substrate is used as a bottom plate of the integrated piezoelectric pump and is used for supplying power to piezoelectric elements of the pump body and controlling the piezoelectric elements of the pump body; and a conductive through hole is formed in the side wall part, and is used as a path for supplying power to the piezoelectric element of the pump body by the bottom substrate.

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 discloses a structural space staggered piezoelectric jet system for cooling electronic components, which belongs to the technical field of micro piezoelectric pumps and comprises a piezoelectric jet pump and a jet top plate. The number of the jet pumps is at least five, liquid outlet flow channels are parallel to one another, openings of the liquid outlet flow channels are evenly formed in a jet top plate, and each pump body comprises a pump cavity, a piezoelectric vibrator, a Tesla flow channel and a jet hole. An inlet in the outer side of the Tesla flow channel is connected with pumping liquid and is inwards and sequentially communicated with a jet flow hole and a pump cavity of the pump body where the Tesla flow channel is located; the pump cavities in the plurality of pump body groups (layers) are provided with respective jet holes, the jet holes are in the form of expanded pipes from the pump cavities to the leftmost jet top plates, and barb structures are uniformly distributed on the inner wall surfaces of the pipes; the jet pumps of the multiple pump bodies are arranged in a staggered mode, jet flow interference is avoided, the overall structure is compact, it can be ensured that fluid efficiently enters and exits a pump cavity, and the stable jet flow effect is achieved.

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.

To cool a plurality of piezoelectric pumps connected to each other in series while continuously ejecting fluid.SOLUTION: A fluid control device 10 comprises: a first piezoelectric pump 41 and a second piezoelectric pump 42 connected sequentially from the upstream of a flow path where fluid flows, to the downstream; a drive circuit 30 supplying a first drive signal to the first piezoelectric pump 41 and a second drive signal to the second piezoelectric pump 42; and a control circuit 20 controlling the operation of the drive circuit 30. The control circuit 20 acquires a control command value which depends on the temperature of the second piezoelectric pump 42. The control circuit 20 controls the drive circuit 30 in such a manner that the supply of the first supply power by the first drive signal is suppressed while continuing the supply of the second drive signal when a control command value falls within a stop determination range.SELECTED DRAWING: Figure 1

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.

Blood pressure measuring device (1), which has: a cuff (40) which, when worn on a blood pressure measuring area, pressurizes an artery in the measuring area at the pressure of a fluid in the cuff (40); a piezoelectric pump (31) which increases the pressure within the cuff (40); an air outlet unit (32) which reduces the pressure within the cuff (40); a pressure detection unit (33) which detects the cuff pressure, which is the pressure content of the cuff (40); and a control unit (20) wherein the control unit (20) includes: a determining device which determines a control amplitude and determining a control frequency of a voltage applied to the piezoelectric pump (31) (step S111 to step S114, step S131 to step S134); an applied voltage control means which carries out the control so that a voltage at the control amplitude and control frequency determined by the determining means is applied to the piezoelectric pump (31) (step S121, step S122); and a blood pressure measuring device which calculates a blood pressure value based on the cuff pressure detected by the pressure detecting unit during inflation when the cuff pressure is increased by the piezoelectric pump (31) (step S123), and wherein the applied voltage control means can control the amplitude of the voltage in predetermined steps and, in a predetermined order, applies a voltage having an amplitude which is a value above the control amplitude by at least one step and a voltage having an amplitude which is a value below the control amplitude by at least one step, so that the discharge of the piezoelectric pump (31) is approximately the same as when a voltage at the control amplitude determined by the determining means is applied (step S111, step S112, step S121, step S122, step S131 to step S133).

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 provides a jellyfish-imitating structure valveless piezoelectric pump and an application method thereof, relates to the technical field of fluid machinery, and solves the technical problems that an existing valveless piezoelectric pump has the defects of being low in pump flow, prone to backflow and the like, and popularization of the valveless piezoelectric pump is seriously affected. According to the technical scheme, by means of the forward resistance reduction effect of a jellyfish appearance structure, a flow resistance difference is formed when fluid flows through a jellyfish-imitating structure in the forward direction and the reverse direction, and the forward flow resistance difference and the reverse flow resistance difference are further expanded by means of the telescopic function of the jellyfish-imitating structure, so that the pump flow and the backflow resistance of the jellyfish-imitating structure valveless piezoelectric pump are improved; the working performance of the valveless piezoelectric pump can be effectively improved.

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.

The embodiment of the utility model relates to the technical field of piezoelectric air pumps, in particular to a piezoelectric pump shell used for a seat comfort system and a piezoelectric air pump, the piezoelectric pump shell comprises a shell body, the shell body is provided with a through hole and at least two containing grooves, the bottom of each containing groove is respectively provided with an air inlet hole and an air outlet hole, the through hole penetrates through the shell body along a first direction, and the through hole penetrates through the shell body along a second direction; at least one filling hole is further formed between the air inlet hole and the air outlet hole in the same containing groove, the air inlet hole, the air outlet hole and the filling hole are all formed in the second direction, the second direction is perpendicular to the first direction, and the air inlet hole, the air outlet hole and the filling hole are communicated with the through hole; and the filling part is accommodated in the filling hole, and the filling part is used for sealing and blocking the position, corresponding to the filling hole, in the through hole, so that a complete gas path is formed in the shell. The middle gas path channel is arranged in the piezoelectric pump shell, the shell can be manufactured through one-time injection molding and other integrated forming processes, then the filling part is arranged in the filling hole through the one-time forming process, and manufacturing of the piezoelectric pump shell can be completed.

The invention relates to a blood pressure measurement integrated control circuit, a chip, a method and electronic equipment, belongs to the technical field of blood pressure measurement, solves the problem that a blood pressure measurement device in the prior art cannot meet the requirements of ultrathin miniaturization and accurate measurement, and comprises an algorithm circuit, a pump driving circuit and an external system interface circuit, wherein the algorithm circuit comprises an algorithm module and an algorithm module driving circuit, and the algorithm module is integrated into an algorithm module chip and provides a driving signal and a PWM (Pulse Width Modulation) wave signal; the pump driving circuit is connected with the algorithm module and an external piezoelectric pump interface, receives a driving signal and a PWM wave signal from the algorithm module, generates an output voltage and provides the output voltage to the external piezoelectric pump interface; the external system interface circuit is connected with the algorithm module and comprises a level conversion circuit for providing signal transmission between the algorithm module and an external system; the pump driving circuit comprises a driving module and a boosting part.

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.

The invention provides a piezoelectric pump which comprises a vibrating reed, a piezoelectric patch and an electrode plate, the electrode plate is arranged on one side of the vibrating reed and electrically insulated from the vibrating reed, the electrode plate is provided with a first through hole, and the piezoelectric patch is arranged on the surface, close to the electrode plate, of the vibrating reed and corresponds to the first through hole. The electrode plate extends towards the piezoelectric plate to be provided with a plurality of conductive ends, the conductive ends are electrically connected with the piezoelectric plate, and the conductive ends are symmetrical relative to the center of the piezoelectric plate. The excited piezoelectric plate can drive the vibrating plate to drive external air to enter the piezoelectric pump. The electrode plate is provided with a plurality of centrosymmetric conductive ends, and the plurality of centrosymmetric conductive ends can uniformly distribute the force generated in the vibration process of the piezoelectric plate to the two ends of the electrode plate, so that the piezoelectric plate is prevented from cracking due to unbalanced stress under interaction. And when the piezoelectric plate is cracked due to other reasons, the plurality of conductive ends can also bring the current to all parts of the piezoelectric plate, so that the piezoelectric plate can play a maximum role.