Conductive liquid micro driving device and applications thereof

[0049] Example one:

[0050] In this embodiment, see Figure 1~4 , A conductive liquid micro-drive device, including a flexible substrate 7, a rectangular coil 8, an insulating layer 9, a magnetic conductive layer 11, a cover 12 and an inverter 13. The flexible substrate 7 is made of an insulating flexible material, which has good flexibility , To meet the needs of complex deformation, the back of the flexible substrate 7 forms a mounting joint, the outer wall of the tube is used as the installation location, and the back of the flexible substrate 7 is fixedly combined with the outer wall of the tube. On the front of the flexible substrate 7, from bottom to top The magnetic conductive layer 11 and the cover 12 are arranged, and k×j rectangular coils 8 are used to form a coil array, where the number of rows is k=4, the number of columns is j=6, and an insulating layer 9 is arranged between any adjacent rectangular coils 8. An insulating layer 9 is also arranged between the loop wires of the rectangular coils 8, the rectangular coil 8 is arranged in the magnetic conductive layer 11, and a cover 12 is arranged on the magnetic conductive layer 11 to drive the flexible substrate 7 to be enclosed in a ring after bending In the space, the inverter 13 is connected to the corresponding rectangular coil 8 array to form an axisymmetrically distributed radial induced magnetic field in the enclosed space enclosed by the flexible substrate 7. The time-varying electric field provided by the inverter 13 is in the rectangular coil 8 array A traveling wave magnetic field that moves in the axial direction is formed, and the traveling wave magnetic field generates electromagnetic force in the same direction to drive the conductive liquid in the pipe in the annular enclosed space to flow. In this embodiment, see Figure 1~3 , A rectangular coil 8 is provided on the front of the flexible substrate 7, an insulating layer 9 is provided between the wires of the rectangular coil 8 and between adjacent rectangular coils 8, the magnetic conductive layer 11 is provided on the rectangular coil 8, and the cover 12 will The rectangular coil 8 and the magnetic conductive layer 11 are encapsulated on the front of the flexible substrate 7. The flexible substrate 7 is curled and the back is wrapped around the outer wall of the pipe. Several rectangular coils 8 distributed axisymmetrically in the radial direction of the pipe form several axisymmetric induced magnetic fields. Under the action of alternating current, a traveling wave magnetic field and electromagnetic force moving along the axial direction of the pipeline are generated to drive the conductive liquid in the pipeline to flow.

[0051] In this embodiment, see Figure 1~4 The wire of the rectangular coil 8 is made of low-resistance material by pattern etching and printing. The wire of each rectangular coil is spirally wound in a multilayer printing plane. Several rectangular coils 8 are formed on the unfolding plane MNQP of the flexible substrate 7 to form 4× In the coil array of 6, the number of rectangular coils 8 with the same wire winding direction in each column of the coil array is 4, and 4 rectangular coils 8 with the same pattern, size and interval in each column are connected in series to form the S of the electromagnetic pole. Pole or N-level, that is, 1 column, 4 rectangular coils 8 with the included angle of the central axis of any two adjacent rectangular coils 8 in the same column is 90°, and are axisymmetrically distributed around the annular enclosed space formed by the bending of the flexible substrate 7 Upward, the greater the number of rows k, the higher the axial symmetry of the radial induced magnetic field and the higher the uniformity of the axial electromagnetic force. The rectangular coils 8 in column j have the same effective number of turns. The winding direction is opposite to form a pair of electromagnetic poles, namely S-level and N-level. The traveling wave magnetic field requires j=a×b columns of rectangular coils 8, where a=3 is the number of phase currents, and b=2 is the electromagnetic pole NS two poles , Constitute 6 pairs of ring-shaped electromagnetic poles: S1, N3, S2, N1, S3, N2, when using three-phase alternating current, 2 pairs of electromagnetic poles, and one electromagnetic pole containing 4 rectangular coils 8, namely j=3× 2. k=4, the rectangular coil 8 array forms 6 ring-shaped electromagnetic poles S1, N3, S2, N1, S3, N2 along the axial direction of the pipe, that is, the first S electromagnetic pole S1 and the third N electromagnetic pole N3 in sequence , The second S electromagnetic pole S2, the first N electromagnetic pole N1, the third S electromagnetic pole S3, and the second N electromagnetic pole N2.

[0052] In this embodiment, see Figure 1~4 In the 4×6 coil array, any two adjacent columns of 4×2 rectangular coil 8 sub-arrays, the internal wiring of the 4×2 rectangular coil 8 sub-array is: 4 rectangular coils wound in the same direction 8 is connected in series to form an electromagnetic pole, and the 4 rectangular coils forming the S pole are connected in reverse to the 4 rectangular coils forming the N pole. 8 forming a pair of electromagnetic poles. The output terminal of the first S electromagnetic pole S1 is connected to the first N electromagnetic pole The input terminal of N1, the output terminal of the second S electromagnetic pole S2 are connected to the input terminal of the second N electromagnetic pole N2, and the internal wiring of the three-phase 4×6 rectangular coil 8 array is analogously deduced. The inverter provides three-phase alternating current. The external wiring of the 4×2 rectangular coil sub-array is: the input terminal of the first S electromagnetic pole S1 is connected to the output terminal of the first phase of the inverter, and the output of the second N electromagnetic pole N2 Terminal is connected to the second phase input terminal of the inverter, the input terminal of the second S electromagnetic pole S2 is connected to the second phase output terminal of the inverter, and the output terminal of the first N electromagnetic pole N1 is connected to the first phase input of the inverter At the end, the three-phase 4×6 rectangular coil array and the external wiring of the inverter can be deduced by analogy. The electric inverter adjusts any of the time, phase, frequency and magnitude of the phase current according to external commands.

[0053] In this embodiment, see Figure 1~4 , The wire of the rectangular coil is covered with a flexible organic material insulating layer, and the insulating layer is provided with a magnetic permeable layer. The permeable layer is made of soft magnetic composite material. The coercivity of the soft magnetic composite material <100A/m, magnetic permeability> 6000H/m, the magnetic permeable layer is filled in the gap and outside of the rectangular coil wire covered by the insulating layer. After power on, the rectangular coil array magnetizes the permeable layer to strengthen the induced magnetic field.

[0054] In this embodiment, see Figure 1~4 , The cover 12 is made of corrosion-resistant, impact-resistant, flexible, electromagnetic-proof, waterproof, and dust-proof polymer materials. The cover 12 can protect the safe operation of the circuit on the flexible substrate 7. The back of the flexible substrate 7 is provided with an adhesive or a mechanically structured installation joint, so that the flexible substrate 7 is connected to the selected installation location, and can match the inner or outer walls of pipes of different shapes. The wire of the rectangular coil 8 is made of copper low-resistance material and is made of a pattern etching printing method, and the wire of the rectangular coil 8 is covered with a flexible organic material insulating layer 9 as a polyamide. The magnetic permeable layer 11 is filled in and outside of the conductor gaps of the rectangular coil 8 covered by the insulating layer 9, and the rectangular coil 8 array magnetizes the magnetic permeable layer after being energized to form a strengthening of the induced magnetic field.

[0055] In this embodiment, see Figure 1~4 , Combine the mounting part on the back of the flat flexible substrate 7 with the inner or outer wall of the pipe, and bend the flexible substrate 7 into a pipe-shaped cylindrical structure, that is, when the flexible substrate 7 is wound, the flexible substrate 7 is initially docked with the end line MN Butt and overlap with the end butt end line PQ, and bend with the start butt end line MN and the end butt end line PQ as the bus bars to form an annular closed space; k rectangular coils 8 in each row are symmetrically distributed along the radial axis of the pipeline , The included angle between the central axes of any two adjacent rectangular coils 8 is 90°. After the multi-phase current is applied, k axisymmetric induced magnetic fields generate movement along the axis of the pipeline, that is, k traveling wave magnetic fields. The wave magnetic field and AC electric field work together to form an axial electromagnetic force, which promotes the flow of conductive liquid in the pipeline, and changes the phase, frequency, time and size parameters of the inverter 13 AC power through external commands to adjust the magnetic induction intensity and movement of the traveling wave magnetic field Direction, control the magnitude and direction of the axial electromagnetic force, to achieve precise control of the flow, velocity or direction of the conductive liquid in the pipeline.

[0056] In this embodiment, see Figure 1~4 The wire of the rectangular coil 8 is made of low-resistance material copper by pattern etching and printing. The wire of each rectangular coil 8 is spirally wound in a multilayer printing plane. Increasing the number of wire turns can reduce the cross-sectional area and current density of the wire. To increase the magnetic flux density of the induced magnetic field, a 4×6 coil array is formed by several rectangular coils on the expansion plane MNQP of the flexible substrate. Each column is composed of 4 rectangular coils wound in the same direction in series, and several rectangular coils in the same column The winding direction is the same, and the winding directions of the rectangular coil groups in two adjacent rows are opposite. The 6 rows of rectangular coils 8 form 3 pairs of electromagnetic poles, which are S1, N3, S2, N1, S3, and N2 in sequence. After alternating current, they are axisymmetric The induced magnetic field forms an axially moving traveling wave magnetic field, which generates axial electromagnetic force to drive the flow of conductive liquid.

[0057] In this embodiment, see Figure 1~3 After the flexible substrate is curled, the initial butting end line MN of the unfolding plane overlaps with the end butting end line PQ to form a cylindrical shape. In each column, 4 rectangular coils 8 wound in the same direction are distributed in a 90° axisymmetric manner on the radial circumferential surface. Above, 4 radial induced magnetic fields are generated, and the specific wiring method of the 4×6 coil array is:

[0058] The first S electromagnetic pole S1 is composed of 4 clockwise-wound rectangular coils in series, the output end of each rectangular coil is connected to the input end of the next rectangular coil, and the input end 1 of the first rectangular coil is connected to a three-phase inverter The first output terminal A of the phase current, the output terminal 1'of the fourth rectangular coil is connected to the input terminal 4 of the first rectangular coil of the first N electromagnetic pole N1;

[0059] The first N electromagnetic pole N1 is composed of 4 rectangular coils wound counterclockwise in series, the output end of each rectangular coil is connected to the input end of the next rectangular coil, and the input end 4 of the first rectangular coil is connected to the first S electromagnetic pole The output terminal 1'of the fourth rectangular coil of S1, and the wire output terminal 4'of the fourth rectangular coil are connected to the first input terminal X of the phase current of the three-phase inverter;

[0060] The second S electromagnetic pole S2 is composed of 4 clockwise-wound rectangular coils in series, the output end of each rectangular coil is connected to the input end of the next rectangular coil, and the input end 3 of the first rectangular coil is connected to a three-phase inverter The second output terminal B of the phase current, the output terminal 3'of the fourth rectangular coil is connected to the input terminal 6 of the first rectangular coil of the second N electromagnetic pole N2;

[0061] The second N electromagnetic pole N2 is composed of 4 rectangular coils wound counterclockwise in series, the output end of each rectangular coil is connected to the input end of the next rectangular coil, and the input end 6 of the first rectangular coil is connected to the second S electromagnetic pole S2 The output terminal 3'of the fourth rectangular coil, and the wire output terminal 6'of the fourth rectangular coil is connected to the second input terminal Y of the phase current of the three-phase inverter;

[0062] The third S electromagnetic pole S3 is composed of 4 clockwise-wound rectangular coils in series, the output end of each rectangular coil is connected to the input end of the next rectangular coil, and the input end 5 of the first rectangular coil is connected to the three-phase inverter The third output terminal C of the phase current, the output terminal 5'of the fourth rectangular coil is connected to the third N electromagnetic pole N3 and the input terminal 2 of the first rectangular coil;

[0063] The third N electromagnetic pole N3 is composed of 4 rectangular coils wound counterclockwise in series, the output end of each rectangular coil is connected to the input end of the next rectangular coil, and the input end 2 of the first rectangular coil is connected to the third S electromagnetic pole The output terminal 5'of the fourth rectangular coil of S3, and the wire output terminal 5'of the fourth rectangular coil are connected to the third input terminal Z of the phase current of the three-phase inverter;

[0064] That is, the current path of the three-phase alternating current of the rectangular coil 8 array is: the first output terminal A of the inverter 13 → the first S electromagnetic pole S1 → the first N electromagnetic pole N1 → the first input terminal X of the inverter 13, The second output terminal B of the inverter 13→the second S electromagnetic pole S2→the second N electromagnetic pole N2→the second input terminal Y of the inverter 13, the third output terminal C of the inverter 13→the third S The electromagnetic pole S3→the third N electromagnetic pole N3→the third input terminal Z of the inverter 13.

[0065] In this embodiment, see figure 1 , figure 2 with Figure 4 By controlling the three-phase inverter 13 to change the phase, frequency, voltage or current of the alternating current, the axial traveling-wave magnetic field generates electromagnetic force to achieve precise control of the flow rate, flow, and direction of the conductive liquid. The cover is made of flexible polymer materials with corrosion resistance, impact resistance, insulation and magnetic conductivity, waterproof and dustproof, which can protect the safe operation of the circuit on the flexible substrate.

[0066] In this embodiment, see figure 1 with image 3 , The back of the flexible substrate 7 is provided with glue or a mechanical structure of the installation joint, so that the flexible substrate 7 is connected to the selected installation site, which can match the inner wall or outer wall of the pipeline of different shapes, and is easy to install and remove.

[0067] See image 3 with Figure 4 In the application of the conductive liquid micro-drive device of this embodiment, the mounting part on the back of the flat flexible substrate 7 is combined with the inner or outer wall of the pipe, and the flexible substrate 7 is bent into a tube-shaped structure of the pipe, that is, when the flexible substrate 7 is wound , The flexible substrate 7’s initial butt terminal line MN and the end butt terminal line PQ are butted and overlapped together, and the initial butt terminal line MN and the end butt terminal line PQ are used as the bus bars to be bent to form a ring-shaped closed space; The coils 8 are distributed symmetrically along the radial axis of the pipeline, and the included angle between the central axes of any two adjacent rectangular coils 8 is 360°/k. After the multiphase current is applied, k axisymmetric induced magnetic fields are generated along the pipeline The axial movement of the inverter, that is, k traveling wave magnetic fields. The traveling wave magnetic field and the AC electric field work together to form an axial electromagnetic force, which promotes the flow of conductive liquid in the pipeline, and changes the phase, frequency, and time of the AC power of the inverter 13 through external commands. And size parameters, adjust the magnetic induction intensity and direction of movement of the traveling wave magnetic field, control the size and direction of the axial electromagnetic force, and achieve precise control of the flow, velocity or direction of the conductive liquid in the pipeline. The conductive liquid micro-driving device is installed on the outer wall of the nozzle connecting pipe of the droplet ejector to form an electromagnetic driving pump for conductive liquid. By controlling the conductive liquid micro-driving device, the conductive liquid loaded in the nozzle connecting pipe is driven to eject.

[0068] See image 3 with Figure 4 In this embodiment, the conductive liquid micro-driving device is installed on the outer wall of the nozzle connecting pipe of the droplet ejector, and the liquid loaded in the nozzle connecting pipe is driven to eject by controlling the conductive liquid micro-driving device. In this embodiment, a single conductive liquid micro-driving device is fixed on the outer wall of the pipeline to form a single-channel droplet ejector. When the rectangular coil 8 array is loaded with three-phase alternating current, an axially moving traveling wave magnetic field is generated in the pipeline, and the direction of the electromagnetic force is the same as the direction of the traveling wave magnetic field, which can drive the eye drops to be sprayed out of the pipeline nozzle. By changing the size, phase, and frequency of the three-phase alternating current to control the intensity and direction of the generated traveling wave magnetic field, the electromagnetic force with controllable size and direction is obtained, and high-speed, small-scale conductive droplet ejection is achieved. This embodiment adopts the horizontal spray method. Can complete the dripping of eye drops, such as Figure 4 Shown. Relevant studies have proved that when the volume of eye drops is very small, the kinetic energy of high-speed moving droplets is low, and it will not cause eye damage. This embodiment changes the posture of the traditional eye drops, from head-up instillation to horizontal instillation, which improves the patient's operating comfort, saves eye drops, makes eye drops spray simpler and faster, and has a compact overall structure , No energy output mechanism, no energy transfer mechanism, easy to use, easy to carry, low noise, long service life and other advantages.

[0069] The conductive liquid micro-drive device of this embodiment uses several rectangular coils 8 to form a coil array to form a number of electromagnetic poles arranged in sequence. An insulating layer 9 is arranged between the wires of the rectangular coil 8, and the magnetic conductive layer 11 is filled with the insulating layer 9 Covering the rectangular coil 8 at the conductor gap and outside, the cover 12 realizes the functions of three preventions and mechanics. The inverter 13 is connected to the rectangular coil array to provide alternating current to form a traveling wave magnetic field, which generates electromagnetic force in the same direction as the traveling wave magnetic field. The force drives a small volume of conductive liquid to flow. The back of the flexible substrate 7 is provided with glue or a mechanical structure of the installation joint, so that the flexible substrate 7 is connected to the selected installation location, which can match the inner or outer wall of the pipeline with different shapes. In this embodiment, a single conductive liquid micro-drive device is fixed on the inner or outer wall of the pipeline to form a single-channel conductive liquid circulation pipeline, which controls the start and stop, flow rate, flow and direction of the conductive liquid in the branch pipe respectively.

[0070] Embodiment two:

[0071] This embodiment is basically the same as the first embodiment, and the special features are:

[0072] In this embodiment, see Figure 5 , An application of a conductive liquid micro-driving device, the flexible conductive liquid micro-driving device is wrapped on the outside of the biological conductive liquid pipeline to form an electromagnetic drive pump for the biological conductive liquid. The biological conductive liquid pipeline is the blood vessel, and the biological conductive liquid is Blood, by controlling the conductive liquid micro-drive device, drives the conductive liquid in the biological conductive liquid pipeline to flow, thereby reducing the adhesion of the biological conductive liquid on the biological conductive liquid pipe wall, and preventing the deposits or deposits on the inner wall of the biological conductive liquid pipe. The attachments undergo accelerated dissolution treatment, and the size, phase or frequency of the multiphase current applied by the conductive liquid micro-drive device is changed to control the electromagnetic force to wash away the macromolecular particles deposited on the inner wall of the biological conductive liquid pipeline by the biological conductive liquid , So as to clean the inner surface of the pipe.

[0073] Under the skin effect, compared with the liquid layer close to the center of the pipe, the intensity of the induced magnetic field in the liquid layer close to the pipe wall is greater, so the electromagnetic force is greater, and the flow rate of the conductive liquid in the pipe wall layer is faster. Figure 5 Shown. In the cross section of the pipeline, the velocity distribution of the liquid directly driven by electromagnetic force gradually decreases from the pipe wall to the center, while the velocity distribution of the conventional driving liquid gradually increases from the pipe wall to the center, and the velocity distributions of the two are completely opposite. The characteristics of the higher liquid flow rate in the tube wall layer caused by the electromagnetic force reduces the adhesion of the conductive liquid to the tube wall, accelerates the flow of the tube wall liquid, and accelerates the dissolution of the conductive liquid on the tube wall.

[0074] In this embodiment, see Figure 5 , The flexible drive device is wrapped around the outside of the blood vessel to form a blood electromagnetic drive pump. The heart provides pressure to let the blood flow in the blood vessels. The blood flow rate in the center of the pipeline is fast, and the blood flow rate near the tube wall is slow. The flow rate of the bioconductive liquid in the blood center layer in the blood vessel is very small, and the higher flow rate of the bioconductive liquid in the tube wall layer is reduced. The adhesion of the biological conductive fluid to the blood vessel wall accelerates the dissolution of the thrombus deposited on the blood vessel wall by the biological conductive fluid. Therefore, the fat particles in the blood are easy to deposit on the inner wall of the blood vessel, forming thrombus, and hinder the flow of blood. . The electromagnetic force provided by the flexible drive device of this embodiment is as above, which accelerates the blood flow near the tube wall, slows down the deposition of macromolecular particles on the tube wall, and changes the magnitude, phase, and frequency of the current to control the electromagnetic force, so as to scour the deposition in the tube. The macromolecular particles on the wall clean up blood clots and form a self-cleaning blood vessel.

[0075] Embodiment three:

[0076] This embodiment is basically the same as the previous embodiment, and the special features are:

[0077] See Image 6 In this embodiment, three flexible driving devices are used, and the mounting parts on the back of the flexible substrate 7 of the three flexible driving devices are respectively covered on the outside or inside of the three branch pipes (10, 20, 30), and the three branch pipes ( 10, 20, 30) Input 3 kinds of conductive liquids respectively, and control the time, phase, size, direction and frequency parameters of the input current of 3 inverters 13 to generate traveling wave magnetic field that meets the requirements, and obtain different sizes and directions Electromagnetic force pushes the conductive liquid in the three branch pipes (10, 20, 30) to flow in the same or reverse direction at speeds v1, v2, and v3, respectively, and v1+v2+0, v1+v2+v3 are obtained in the manifold 40 , 0+v2+v3, -v1+v2+v3, v1+0+v3, v1-v2+v3, v1+0-v3, v1+v2-v3, v1-v2+0, v1-v2-v3, 0+v2-v3 or v1+v2-v3, different components, different flow rates, different flow rates or different flow directions of the micro-fluid ejection controller of micro-fluid ejection.

[0078] See Image 6 In this embodiment, a plurality of conductive liquid micro-driving devices are respectively fixed on the outer walls of a plurality of branch pipes of a junction pipe to form a structure in which three liquid flow-driven branch pipes merge into the main pipe to form a multi-channel microfluid ejection control The device controls the start and stop, flow rate, flow and direction of the conductive liquid in the branch pipes, and obtains the required components, different fluid parameters, different flow directions, and different flow sequences in the main pipe to form a multi-channel microfluid ejection controller. The required component of the confluence obtained in the manifold is a single component or multiple mixed components of at least two components, and confluences with different fluid parameters and different flow directions are obtained. The conductive liquid micro-drive device of this embodiment can be widely used in the fields of biomedicine, material synthesis, chemistry and chemical engineering.

[0079] In this embodiment, based on the electromagnetic force driving principle of the above-mentioned conductive liquid, liquids of different mixed compositions are obtained in the pipeline after confluence. The fluid back pressure mechanism and the fluid propulsion mechanism of the conventional fluid driving scheme are omitted, and space is saved. The electromagnetic thrust directly acts on The liquid at the tube wall reduces the frictional resistance between the liquid and the tube wall, helps the flow of the liquid, and switches the forward and reverse of the driving force by changing the direction of the current, which solves the control problem of fluid inertia.

[0080] Based on the above embodiments, the conductive liquid micro-drive device of the present invention can make corresponding changes according to the actual shape of the tube wall. The device is not limited to being externally placed on the tube wall, but can also be built inside the tube wall to directly contact the conductive liquid, and there is no mechanical transmission inside. Components, pollution-free, no chemical reaction, can accurately control the fluid composition, flow, flow rate, reaction sequence, etc. participating in the chemical reaction, making the reaction process more adequate and quantitative. It can be seen from the above embodiments that the present invention can be used in the fields of microinjection and distribution of conductive liquids such as biopharmaceuticals, medical equipment, chemical formulations, material synthesis, fluid transportation, and food processing.