18 results about "Electrohydrodynamics" patented technology

The present disclosure relates to a process for electrostatic spray drying of a living microorganism with a specific surface charge. using electrostatic charge provided by a high voltage source, wherein said electrostatic charge is the same as the surface charge of the microorganism.

The invention discloses a device and a method for preparing tiny liquid drops based on electrohydrodynamics. The micro-droplet preparation device comprises a droplet generator, a pressure control system, a vacuum system, a temperature control system, a high-voltage power supply, an electrode substrate, a droplet measuring system and a droplet collector. A liquid material is stored in the liquid storage cavity, a temperature control system is installed outside the cavity, and the top of the cavity is connected with a pressure control system through a gas pipeline. The pressure control system is adjusted to inject argon into the liquid drop generator, so that the liquid forms a stable meniscus at the nozzle opening. When direct-current high pressure is applied between the electrode substrate and the nozzle, the bottom of the sprayed fluid can be broken into liquid drops with smaller diameters; a liquid drop generator with a PZT piezoelectric assembly is adopted, pulse voltage is applied, and tiny liquid drops can also be prepared by means of vibration of a PZT piezoelectric driver. By adopting the device provided by the utility model, a nozzle with the diameter range of 50-350 microns can be used, and micro-droplets with the diameter of 13 microns, which are 3-26 times smaller than the diameter of the nozzle, can be prepared.

The invention relates to the field of electrohydrodynamics, and particularly provides a regulation and control system and a control method based on non-fusion of charged liquid drops in an open environment, the regulation and control system comprises a direct-current high-voltage source, an injection pump, a capillary probe and a dielectric nano ultramicro electrode, voltage with different polarities is utilized, and on the basis of electrohydrodynamics regulation and control, the regulation and control of the charged liquid drops in the open environment are realized. A non-fusion system of charged fluids with different polarities in an open environment is formed; the control method comprises the following steps: in an open system, the water-soluble liquid containing the dielectric nano ultramicro electrode passes through an injection pump at a specific flow rate and at a specific spatial distance by means of the electrohydrodynamic property formed by capillary probes applying high-voltage power supplies with different polarities; liquid drops with opposite polarities at the tip end of the probe can form a meniscus bridge at the liquid contact end under the action of Taylor cone sheath stress.

A method for altering one or more properties of a dielectric fluid for use in an electrohydrodynamic, EHD, thermal management system (100), as well as the system, are provided. The system comprises at least one EHD pump unit (110) comprising at least two electrodes for pumping the dielectric fluid and at least one enclosure (120) for accommodating the fluid within the system. The method comprises exposing the dielectric fluid to an ionizing process (122) configured to ionize the dielectric fluid, and operating the pump unit to circulate the exposed fluid in the enclosure.

The present invention provides a non-contact ion transdermal drug delivery system and method, belonging to the technical field of transdermal drug delivery. The system includes an extraction unit and an ion regulation unit; the extraction unit includes a high-voltage power supply, an extraction chamber, and electrodes; the electrodes are connected to the high-voltage power supply and are vertically arranged inside the extraction chamber, and the extraction chamber includes an extraction area, a conical connection area, and a microporous area with microporous channels arranged in sequence from top to bottom; the ion regulation unit includes a stepped electric field chamber, an ion regulation module, and a guiding power supply; the ion regulation module includes at least two groups of coaxial and vertically spaced annular electrodes. The method includes: placing a drug and a solvent in the extraction chamber, generating electrohydrodynamics under the action of a direct current high voltage, extracting drug active molecules and converting them into drug active ions; entering the stepped electric field chamber to generate drug active ion clusters and penetrate to the area to be administered. The present invention develops a transdermal drug delivery system and method that is contactless, free of exogenous contamination, in-situ extraction, has high utilization rate and good penetration.

The present application relates to a kind of flexible foldable bionic wing, specifically to a kind of flexible foldable bionic wing based on electrohydrodynamics pump drive, the present application belongs to bionic technology coupling field, the purpose of the present application is to solve the problem that existing bionic technology relies on micro motor and complex mechanical transmission mechanism to realize wing unfolding and retraction, system structure is complex and manufacturing cost is higher, it constitutes the obstacle to its in harsh space constraint or light weight requirement higher scene, folding bionic wing is installed on pipeline integrated module, pipeline integrated module is connected with the pipeline of folding bionic wing, liquid storage device is connected with electrohydrodynamic pump and provides dielectric liquid, power supply equipment is connected with electrohydrodynamic pump and provides voltage, electrohydrodynamic pump is connected with pipeline integrated module and controls dielectric liquid to flow in the pipeline integrated module and the pipeline of folding bionic wing, dielectric liquid flows in the pipeline of folding bionic wing and controls the folding and unfolding of folding bionic wing.

Provided is a liquid crystal material applied to a multi-response-mode smart window and an application thereof. The present disclosure relates to a liquid crystal material and an application thereof. The problem of high drive voltage of the liquid crystal smart window based on dynamic scattering mode in the prior arts can be solved. The liquid crystal material applied to the multi-response-mode smart window is formed by mixing a dichroic dye, an ionic dopant and a liquid crystal. It is applied to preparing an electrohydrodynamics liquid crystal dimming device which is capable of switching among transparent state, light-absorbing state and scattering state under a drive voltage of 5V to 50V and a drive frequency of 1 Hz to 5 kHz.

The present invention relates to the fields of microfluidics and electrofluidic technology, and in particular to a soft crawling caterpillar robot driven by an electrohydrodynamic pump. The robot comprises an electrohydrodynamic soft material pump, an artificial muscle, a liquid reservoir, and auxiliary legs. The electrohydrodynamic pump comprises an upper cover plate, a flow channel layer, an electrode layer, and a base layer. The upper cover plate is provided with a flow channel inlet and a flow channel outlet, which are sealed and connected to the liquid reservoir and the artificial muscle, respectively. The flow channel layer, the artificial muscle, and the liquid reservoir are filled with dielectric liquid. The present invention is a soft robot driven by an electrohydrodynamic soft material pump. Electrohydrodynamics is used to achieve a dielectric liquid pumping effect, pumping the dielectric liquid from the liquid reservoir to the artificial muscle. By utilizing the expansion and bending characteristics of the artificial muscle, the robot can achieve an overall forward crawling motion similar to the crawling characteristics of a "caterpillar." At the same time, the robot is flexible and adaptable, and has higher reliability in harsh environments.

The present disclosure relates to a method for electrostatically spray-drying a living microorganism having a specific surface charge using an electrostatic charge provided by a high voltage power source, wherein the electrostatic charge is the same as the surface charge of the microorganism.

The application discloses a kind of based on electrohydrodynamics drive variable integration unmanned plane flexible actuator system.System includes unmanned plane, pedestal, is equipped with dielectric liquid liquid storage cylinder and several drive variable integration flexible actuators, pedestal is horizontally installed in the center just below unmanned plane, liquid storage cylinder is installed on pedestal, each drive variable integration flexible actuator is vertically arranged in the circumferential direction of pedestal and is uniformly spaced below pedestal, each drive variable integration flexible actuator is electrically connected unmanned plane and is communicated liquid storage cylinder, by double-side electro-hydraulic combined drive each drive variable integration flexible actuator generates strain difference to realize bidirectional bending, to realize grabbing target object or buffering unmanned plane landing in turn.The application system structure is compact, drive response is fast, and has grabbing and landing buffering function, significantly improves the grabbing capacity and environmental adaptability of unmanned plane.

The invention discloses an electrofluid-driven flexible micro tactile feedback device and a driving method. Comprising a silica gel film, an electrode structure, a first flexible silica gel shell and a second flexible silica gel shell, the first flexible silica gel shell is arranged in the middle of the electrode structure, and the silica gel film is fixedly connected with the second flexible silica gel shell through the electrode structure; the electrode structure and the first flexible silica gel shell are each provided with a plurality of through holes which are arranged in an array mode and communicate with one another, and each through hole is filled with dielectric liquid. And after the electrode structure is connected with an external power supply and is electrified, the dielectric liquid in each through hole flows to the silica gel film, so that the silica gel film at the corresponding position protrudes towards one end far away from the electrode structure to form a touch salient point. The micro tactile feedback device has the advantages of being low in noise, low in power consumption, light in weight and the like due to the fact that an electric fluid driving mode is adopted. Meanwhile, due to the full-flexible design, man-machine interaction is safer.

The present invention discloses an electrohydrodynamic-driven three-dimensional encapsulated embedded loop heat pipe, which mainly solves the problems of large volume, strong vibration, high power consumption, and easy liquid leakage existing in the current three-dimensional encapsulated microchannel liquid cooling structure. It includes an evaporator (1), a vapor circulation pipeline (2), a condenser (3), a liquid circulation pipeline (4), and a compensation chamber (5); a three-dimensional encapsulated stack (6) is provided in the evaporator, and a plurality of three-dimensional electrodes are arranged in each encapsulated single layer, and microchannels are formed between the electrodes to promote the directional flow boiling of the working fluid under the drive of electrohydrodynamics; planar electrodes are arranged in the liquid circulation pipeline to promote the working fluid to flow from the liquid pipeline to the compensator and back to the evaporator under the drive of electrohydrodynamics, realizing the circulation of the working fluid and the transfer of heat; the compensation chamber is provided with a temperature control system. The present invention strengthens the heat and mass transfer characteristics of the loop heat pipe, avoids the use of mechanical components, improves the thermal reliability and working stability of three-dimensional encapsulation, and can be used for electronic packaging.

The invention relates to the field of lithium battery processing, and discloses a device for repairing burrs of battery stripping or die-cutting pole pieces by using electrofluidic and fluid dynamics technology. The device comprises a container, wherein the container is provided with a liquid outlet, the interior of the container is filled with fluid, and there is relative motion between the pole piece and the container, and the pole piece absorbs the fluid on the liquid outlet when passing through the liquid outlet. Compared with the prior art, the beneficial effects of the invention are as follows: the piston plate is made of a piezoelectric element, and high-frequency vibration can be achieved after power is turned on, and the fluid forms a Taylor cone at the liquid outlet under the squeezing of the piston plate, and when the pole piece approaches or passes through the liquid outlet, the burrs on the pole piece absorb the fluid forming the Taylor cone on the liquid outlet under the action of the electric field, and the fluid drips onto the pole piece to wrap or decompose the burrs, so that subsequent packaging will not be punctured by the burrs, thereby improving the yield rate.

The utility model discloses a point gum system based on the principle of hydrodynamics, including power module, air pressure control module and point gum mechanism. Power module inserts commercial power and supplies power to air pressure control module voltage stabilization, and point gum mechanism contains Z axial first mounting plate, and its top is equipped with electrical control part, still is equipped with elevating system, and elevating system drives second mounting plate to do Z direction movement through motor, screw rod etc, and second mounting plate bears point gum subassembly, and the point gum head of point gum subassembly is detachable and connects power supply anode, and the point gum platform mesa has negative pressure hole and connects power supply cathode, and both form electric field and realize point gum. Air pressure control module adopts IO system pressure control, and CCD camera module is used for positioning monitoring. The system solves the problem of slow speed, poor stability and low efficiency of traditional point gum in the narrow frame process of display screen module, realizes fast, stable and efficient point gum.

The present invention relates to electrohydrodynamics and plasma chemical synthesis technology, and aims to provide a system and method for pressurized low-temperature plasma coupled catalytic CO2 gas. The system includes a pressurized gas supply system, a DBD reactor and an AC power supply; the main body of the reactor is a composite tubular structure, with an external stainless steel round tube as the outer electrode and an axially arranged metal cylinder as the inner electrode; an annular tubular barrier dielectric layer is provided on the inner side of the outer electrode, and its material is a quartz fiber reinforced silica ceramic-based polymer; a spacing is reserved between the outer side of the inner electrode and the barrier dielectric layer to form an annular tubular cavity as a discharge zone; a powdered Cu / Zn / Al catalyst with a particle size of 40 to 60 mesh is uniformly filled in the discharge zone. The system of the present invention can be used to carry out plasma catalytic conversion reactions under medium and high pressure environments; by designing the reactor structure, selecting the material of the barrier dielectric layer and adjusting the parameters of the input power supply, a stable and high-intensity dielectric barrier discharge can be achieved to convert CO 2 Provide conditions for gas catalytic reaction.

This invention proposes a gripper based on electrohydrodynamics and electrostatic hydraulic drive, comprising at least one finger unit and a palm unit connected to the finger unit. The finger unit includes a fingertip module, a connecting portion, and a bidirectional jet module connected in sequence. The palm unit includes a palm base and a palm suction module. The proximal end of the bidirectional jet module is connected to the palm base. The fingertip module has its backside connected to the connecting portion via a joint capsule, its palm side contacting the distal end of the connecting portion, and its palm side hinged to the connecting portion. The bidirectional jet module is used to drive the dielectric fluid to flow directionally between the finger unit and the palm unit under the action of an electric field. The palm suction module, together with the palm base, forms a closed area for containing the dielectric fluid, and its volume can be changed. This invention has the advantages of compact structure and high integration.

The present invention relates to an inkjet print head having a plurality of nozzles and ejecting a solution by electrohydrodynamics, characterized by comprising: a first electrode formed for each of the plurality of nozzles and to which a voltage for ejecting the solution by electrohydrodynamics is applied; a first voltage controller for applying the voltage to the first electrode; and a second electrode disposed apart between the first electrodes formed on the respective nozzles and grounded, and for preventing interference of electric fields between the respective nozzles.

An electrohydrodynamic tweezer device and method of separating nano-sized particles in a sample. The electrohydrodynamic tweezer device includes a first electrode, a second electrode including a gold film and an array of microholes formed therein, a fluidic chamber between the first electrode and the second electrode, and a voltage source configured to generate an electric field between the first electrode and the second electrode, wherein the array of microholes results in an array of electrohydrodynamic potentials to trap nanoscale-sized particles on the gold film.