CN219185600U - Electroosmotic pump system - Google Patents

Abstract

The application specifically relates to an electroosmotic flow pump and have its electroosmotic flow pump system, and the electroosmotic flow pump includes: at least one electroosmosis unit comprising two porous electrodes and a porous medium between the two porous electrodes; the membrane is arranged on the outer sides of the two porous electrodes, the working fluid and the pumping fluid of the electroosmosis flow pump are respectively arranged on the inner side and the outer side of the membrane, the working fluid pushes the membrane to move to one side under the action of the two porous electrodes, and the pumping fluid is driven to flow to one side through the membrane. The electroosmotic pump provided by the application separates the working fluid and the pumping fluid through the diaphragm, only the working fluid flows through the inside of the electroosmotic pump, and the pumping fluid does not pass through the electrode and the porous medium in the electroosmotic pump, so that the technical problem that the pumping fluid pollutes the internal structure of the electroosmotic pump can be well solved, and the anti-pollution effect of the electroosmotic pump is realized.

Description

Electroosmotic pump system

Technical Field

The application belongs to the technical field of medical instruments, and particularly relates to an electroosmotic flow pump system.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

In the technical field of medical equipment, in particular to the technical field of implanted micropumps, the size of a pump body can be limited by the implantation environment. The miniaturized implanted micropump is not only convenient for patients to carry on a daily basis, but also is beneficial to reducing the wound surface in the operation process. The core driven pump of the implantable micropump may be an electroosmotic pump. The electroosmotic pump drives the hydrated ions in the electric double layer in the porous medium through an external electric field, and drives the fluid through the principle that the hydrated ions form laminar flow in the porous medium. Based on this driving scheme, there is no mechanical moving part inside the electroosmotic flow pump. Electroosmotic flow pumps are easier to miniaturize than mechanical pumps. However, if drugs (especially protein drugs) flow through the internal structure of the electroosmotic pump based on this driving method, the porous medium and the electrode may be contaminated to some extent under long-term operation, which is disadvantageous in maintaining the operation efficiency and performance of the electroosmotic pump.

Disclosure of Invention

The application provides an electroosmotic flow pump, and the purpose is solved current pumping fluid and is polluted the technical problem of electroosmotic flow pump, and this purpose is realized through following technical scheme:

the application provides an electroosmotic flow pump system, which comprises an electroosmotic flow pump and a pipeline communicated with the electroosmotic flow pump;

an electroosmotic flow pump comprising: at least one electroosmosis unit comprising two porous electrodes and a porous medium between the two porous electrodes; the membrane is arranged on the outer sides of the two porous electrodes, the working fluid and the pumping fluid of the electroosmosis flow pump are respectively arranged on the inner side and the outer side of the membrane, the working fluid pushes the membrane to move to one side under the action of the two porous electrodes, and the pumping fluid is driven to flow to one side through the membrane.

Further, in case the electroosmotic flow pump comprises a plurality of electroosmotic units, the plurality of electroosmotic units are connected in series and/or in parallel.

Further, the diaphragm includes a solid film and a liquid film, and both the solid film and the liquid film are incompatible with the working fluid and the pumping fluid.

Further, the electroosmotic flow pump further comprises a pressure sensor, and the pressure sensors are respectively arranged between the diaphragm and the two porous electrodes.

Further, the pipeline comprises:

the first pipeline is arranged on the outer side of the electrode side diaphragm of the electroosmotic pump and is respectively communicated with the medicine bag and the infusion port;

the second pipeline is arranged at the outer side of the other electrode side diaphragm of the electroosmotic pump and is respectively communicated with the medicine bag and the infusion port;

and the control valve module is arranged on the first pipeline and the second pipeline and used for controlling the on-off of the first pipeline and the second pipeline.

Further, the control valve module comprises a one-way valve, and the end part of the first pipeline communicated with the infusion port and the end part of the second pipeline communicated with the infusion port are both provided with the one-way valve.

Further, the end part of the first pipeline communicated with the medicine bag and the end part of the second pipeline communicated with the medicine bag are respectively provided with a one-way valve, or the end part of the first pipeline communicated with the medicine bag and the end part of the second pipeline communicated with the medicine bag are communicated through valves capable of being switched in two directions.

Further, the check valve includes at least one of a solenoid valve, a diaphragm valve, a spring valve, and a swing valve.

Further, the control valve module further comprises a power supply, wherein the power supply is connected with the two porous electrodes of the electroosmotic pump through the controller or is directly connected with the two porous electrodes of the electroosmotic pump.

Further, the power supply is set as an alternating current power supply or a direct current power supply, and the controller controls the power supply to output positive and negative voltages or positive and negative current signals to the two porous electrodes.

The electroosmotic pump provided by the application separates the working fluid and the pumping fluid through the diaphragm, only the working fluid flows through the inside of the electroosmotic pump, and the pumping fluid does not pass through the electrode and the porous medium in the electroosmotic pump, so that the technical problem that the pumping fluid pollutes the internal structure of the electroosmotic pump can be well solved, and the anti-pollution effect of the electroosmotic pump is realized. Specifically, the electroosmosis pump provided by the application adopts a mode of indirectly driving pumped fluid to distinguish the working fluid of the electroosmosis pump from the liquid medicine conveyed in practical application, so that the performance of the electroosmosis pump is prevented from being reduced due to the fact that the internal structure of the electroosmosis pump is contacted with the liquid medicine for a long time. The life of the electroosmotic pump can be prolonged by indirectly driving the form of pumping fluid, and the variety of medicines delivered by the electroosmotic pump in practical application is enlarged.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic diagram of an electroosmotic flow pump system according to a first embodiment of the present application;

fig. 2 is a block diagram of the electroosmotic flow pump system according to the first embodiment of the present application;

FIG. 3 is a schematic diagram of a first operation of an electroosmotic flow pump system according to a first embodiment of the present application;

FIG. 4 is a schematic diagram of a second operation of the electroosmotic flow pump system according to the first embodiment of the present application;

fig. 5 is a schematic structural view of an electroosmotic flow pump system according to a second embodiment of the present application;

wherein, the reference numerals are used for the sake of convenience,

100. an electroosmotic flow pump system; 101: a medicine bag; 102: an electroosmotic pump; 1031: a first one-way valve; 1032: a second one-way valve; 1033: a third one-way valve; 1034: a fourth one-way valve; 104: a conduit; 105: an infusion port; 1021: a porous medium; 1022: a first porous electrode; 1023: a second porous electrode; 1024: a first cavity; 1025: a second cavity; 1026: a pressure sensor; 206: a first drug conduit; 207: a second drug conduit; 208: a two-way switching valve; 2091: a first liquid medicine cavity; 2092: a second liquid medicine cavity.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the application of the implantable targeted drug delivery system to the pulmonary artery is only a preferred embodiment, and is not limited to the application range of the implantable targeted drug delivery system, for example, the implantable targeted drug delivery system of the present application may also be used at other tissues of the human body, and the adjustment does not deviate from the protection range of the implantable targeted drug delivery system of the present application.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are inclusive and therefore specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.

Although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. In addition, in the description of the present application, unless explicitly stated and limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in this application will be understood by those skilled in the art as the case may be.

For ease of description, spatially relative terms, such as "inner," "outer," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatially relative relationship descriptors used herein interpreted accordingly.

In the technical field of interventional medical devices, generally, an end that enters human tissue first is referred to as a "proximal end" of the interventional medical device, an end that a medical staff operates the interventional medical device is referred to as a "distal end" of the interventional medical device, and "proximal end" and "distal end" of any component of the interventional medical device are defined according to this principle.

As shown in fig. 1 and 2, the present application provides an electroosmotic flow pump system comprising an electroosmotic flow pump 102 and a circuit in communication with the electroosmotic flow pump; the electroosmotic pump 102 comprises at least one electroosmosis unit (the electroosmotic pump 102 in fig. 2 comprises one electroosmosis unit) and a diaphragm, the electroosmosis unit comprises two porous electrodes (comprising a first porous electrode 1022 and a second porous electrode 1023) and a porous medium 1021 positioned between the two porous electrodes, the outer sides of the two porous electrodes are respectively provided with a diaphragm, the working fluid and the pumping fluid of the electroosmotic pump 102 are respectively arranged on the inner side and the outer side of the diaphragm, the working fluid pushes the diaphragm to move to one side under the action of the two porous electrodes, and the pumping fluid is driven to flow to one side by the diaphragm.

In this embodiment, the electroosmotic pump 102 provided in the present application separates a working fluid and a pumping fluid by a diaphragm, where the working fluid and the pumping fluid may be different substances, the working fluid may be an aqueous solution, an organic solution such as ethanol, and the pumping fluid may be a liquid medicine. Only the working fluid flows through the interior of the electroosmotic pump 102, and the pumping fluid does not pass through the electrode and the porous medium in the interior of the electroosmotic pump 102, so that the technical problem that the pumping fluid pollutes the internal structure of the electroosmotic pump 102 can be well solved, and the anti-pollution effect of the electroosmotic pump 102 is realized.

Specifically, the electro-osmotic pump 102 provided in the present application adopts a mode of indirectly driving the pumped fluid to distinguish the working fluid of the electro-osmotic pump 102 from the liquid medicine delivered in practical application, so as to avoid performance degradation of the electro-osmotic pump 102 caused by long-time contact between the internal structure of the electro-osmotic pump 102 and the liquid medicine. By indirectly driving the form of the pumped fluid, the life of the electroosmotic pump 102 can also be prolonged, and the variety of drugs delivered by the electroosmotic pump 102 in practical applications can be expanded.

In addition, the material of the diaphragm is not limited in the embodiments of the present application, because the diaphragm includes a solid film and a liquid film, both of which are incompatible with the working fluid and the pumping fluid, and mass transfer between the working fluid and the pumping fluid cannot occur through the diaphragm, the solid film includes rubber, an elastic metal sheet, and the like, and the liquid film includes a film incompatible with the pumping fluid and the working fluid, such as an oil film, and the like, which will not be described in detail herein.

Further, in the case where the electroosmotic flow pump 102 includes a plurality of electroosmotic cells, the plurality of electroosmotic cells are connected in series and/or in parallel. By arranging the electroosmotic pump 102 to be formed by connecting a plurality of electroosmosis units in series or in parallel, the working efficiency and the working performance of the electroosmotic pump 102 can be improved, and the phenomenon of insufficient pumping pressure of the electroosmotic pump 102 can be reduced. Specifically, in the case of serial connection between a plurality of electroosmosis units, the electroosmosis flow pump 102 is provided with a connection terminal connected to an electrode of an initial one of the electroosmosis units, and a connection terminal connected to an electrode of a terminal one of the electroosmosis units, and in the case of parallel connection between a plurality of electroosmosis units, the electroosmosis flow pump 102 is provided with a plurality of connection terminals connected to electrodes of a plurality of electroosmosis units.

Further, the electroosmotic flow pump 102 further includes a pressure sensor 1026, and the pressure sensor 1026 is disposed between the diaphragm and the two porous electrodes, respectively. The inside of the cavity (first cavity 1024 and second cavity 1025) formed between the diaphragm and the electrode is respectively provided with a pressure sensor 1026, and the electroosmotic flow pump 102 controls the working fluid and the pumping fluid in the electroosmotic flow pump 102 according to the pressure signal detected by the pressure sensor 1026, so that the risk of diaphragm breakage caused by overlarge pressure difference in the electroosmotic flow pump 102 is reduced.

Further, the pipeline includes first pipeline, second pipeline and control valve module, and first pipeline sets up in the outside of the one electrode side diaphragm of electroosmotic pump 102 to communicate with medicine bag 101 and infusion port 105 respectively, the second pipeline sets up in the outside of the other electrode side diaphragm of electroosmotic pump 102 to communicate with medicine bag 101 and infusion port 105 respectively, control valve module sets up in first pipeline and second pipeline for the break-make of control first pipeline and second pipeline.

In this embodiment, the liquid medicine in the medicine bag 101 flows into one of the first pipeline or the second pipeline, then is pumped to the other of the first pipeline or the second pipeline by the electroosmotic pump 102 when flowing through the electroosmotic pump 102, and then flows to human tissues from the infusion port 105, and through the electroosmotic pump system 100 provided by the application, not only can the liquid medicine with proper pressure and dosage be pumped to the human tissues, but also the technical problem that the pumped fluid pollutes the electroosmotic pump 102 can be better solved, and the anti-pollution effect of the electroosmotic pump 102 is realized.

Further, the control valve module comprises a one-way valve, and the end part of the first pipeline communicated with the infusion port 105 and the end part of the second pipeline communicated with the infusion port 105 are both provided with the one-way valve. The liquid medicine at the infusion port 105 is controlled to flow back at the first pipeline or the second pipeline through the one-way valve, so that the purpose of conveying the liquid medicine to human tissues at the appointed infusion port 105 through the electroosmotic pump 102 is achieved.

Further, as shown in fig. 1 to 4, in the first embodiment of the present application, both the end portion of the first pipeline communicating with the medicine bag 101 and the end portion of the second pipeline communicating with the medicine bag 101 are provided with one-way valves, and the medicine liquid in the medicine bag 101 is controlled to flow to the first pipeline or the second pipeline through the one-way valves, so as to achieve the purpose of pumping the medicine liquid through the electroosmotic pump 102.

As shown in fig. 5, in the second embodiment of the present application, the end portion of the first pipeline, which is in communication with the medicine bag 101, and the end portion of the second pipeline, which is in communication with the medicine bag 101, are communicated through the bi-directional switching valve 208, and the flow of the medicine liquid in the medicine bag 101 is controlled to the first pipeline or the second pipeline through the bi-directional switching valve 208, so that the purpose of pumping the medicine liquid through the electroosmotic pump 102 is achieved.

Further, the check valve includes at least one of a solenoid valve, a diaphragm valve, a spring valve, and a swing valve.

Further, the control valve module further comprises a power supply, wherein the power supply is set to be an alternating current power supply or a direct current power supply, and the power supply is connected with the two porous electrodes of the electroosmotic flow pump 102 through the controller or directly connected with the two porous electrodes of the electroosmotic flow pump 102. When the power supply is directly connected with the two porous electrodes of the electroosmotic flow pump 102, the power supply outputs a positive voltage or positive current signal to one porous electrode of the two porous electrodes and outputs a negative voltage or negative current signal to the other porous electrode of the two porous electrodes, and when the power supply is connected with the two porous electrodes of the electroosmotic flow pump 102 through the controller, the power supply can alternately output a positive voltage or positive current signal and a negative voltage or positive current signal to the two porous electrodes through the controller.

The power supply also supplies power to the pressure sensor and the check valve.

Specific embodiments of electroosmotic flow pumps of the present application are described in detail below:

example 1

As shown in fig. 1 and 2, the electroosmotic flow pump system 100 in the present embodiment includes a medicine bag 101, an electroosmotic flow pump 102, a first check valve 1031, a second check valve 1032, a third check valve 1033, a fourth check valve 1034, a catheter 104, and an infusion port 105. The electroosmotic flow pump 102 includes a porous medium 1021, a first porous electrode 1022, a second porous electrode 1023, a first cavity 1024, and a second cavity 1025.

Within the first and second cavities 1024, 1025, pressure sensors 1026 are mounted, respectively.

The catheter 104 contains four check valves, which are installed on two sides of the electroosmotic flow micro pump 102, wherein the first check valve 1031 and the third check valve 1033 are located between the medicine bag 101 and the electroosmotic flow pump 102, and the second check valve 1032 and the fourth check valve 1034 are located between the infusion port 105 and the electroosmotic flow pump 102.

The working fluid is present only between the electroosmotic pump 102, the first chamber 1024, and the second chamber 1025. The medical fluid is stored in the medicine bag 101, flows through the conduit 104, the first check valve 1031, the second check valve 1032, the third check valve 1033, and the fourth check valve 1034, and reaches the infusion port 105.

The operation mode of the electroosmotic pump is as follows:

as shown in fig. 3, the positive and negative electrodes of the power supply are connected to the first porous electrode 1022 and the second porous electrode 1023, respectively. When a positive voltage is applied, fluid flows from the first cavity 1024 to the second cavity 1025, and the outer film of the first cavity 1024 and the outer film of the second cavity 1025 move leftwards at the same time, squeezing the fluid outside the second cavity 1025 (forming a high pressure area), and sucking the fluid outside the first cavity 1024 (forming a low pressure area). At this time, under the action of the check valve, the liquid medicine outside the second cavity 1025 cannot pass through the third check valve 1033 (and is closed at this time), but only flows to the infusion port 105 through the fourth check valve 1034 (and is opened at this time), the liquid medicine outside the first cavity 1024 can be replenished through the first check valve 1031 (and is opened at this time) by the medicine bag 101, and the liquid medicine at the infusion port 105 cannot pass through the second check valve 1032 (and is closed at this time) to the outside of the first cavity 1024 for replenishing the liquid medicine.

Conversely, when a negative voltage is applied (as shown in fig. 4), fluid flows from the second chamber 1025 to the first chamber 1024, the outer membrane of the second chamber 1025 and the outer membrane of the first chamber 1024 move rightward simultaneously, squeezing the fluid outside the first chamber 1024 (forming a high pressure area), and sucking the fluid outside the second chamber 1025 (forming a low pressure area). At this time, the chemical liquid outside the first chamber 1024 can only pass through the second check valve 1032 (opened at this time) and cannot pass through the first check valve 1031 (closed at this time) to flow into the infusion port 105 by the check valve. The liquid medicine outside the second cavity 1025 is replenished by the medicine bag 101 through the third one-way valve 1033 (opened at this time), but cannot be replenished by the infusion port 105 through the fourth one-way valve 1034 (closed at this time).

Further, in some embodiments of the utility model, electroosmotic flow pump 102 includes porous medium 1021, first porous electrode 1022, second porous electrode 1023, first flexible material lead, second flexible material lead, heat-shrinkable polyurethane, gasket. One side of the first flexible material lead is bonded to the first porous electrode 1022 through heat-shrinkable polyurethane, and the other side of the first flexible material lead is bonded to the porous medium 1021 through heat-shrinkable polyurethane. One side of the second flexible material lead is bonded to the second porous electrode 1023 by heat-shrinkable polyurethane, and the other side of the second flexible material lead is bonded to the other side of the porous medium 1021 by heat-shrinkable polyurethane.

The first flexible material lead and the second flexible material lead can be silk-screened gold, non-woven conductive materials, gold foil, woven materials formed by conductive carbon fibers and the like.

Example 2

As shown in fig. 5, the electroosmotic pump 102 provided in this embodiment has a first medical fluid chamber 2091 and a second medical fluid chamber 2092 at the outside thereof. The first medical fluid chamber 2091 is connected to the medicine bag 101 through a first medical tube 206, and the second medical fluid chamber 2092 is connected to the medicine bag 101 through a second medical tube 207. There is a two-way switching valve 208 between the first medicament conduit 206 and the second medicament conduit 207.

When a positive voltage is applied to the first porous electrode 1022 and a negative voltage is applied to the second porous electrode 1023, fluid flows from the first chamber 1024 to the second chamber 1025, and the outer membrane of the first chamber 1024 and the outer membrane of the second chamber 1025 simultaneously move leftward, squeezing fluid outside the second chamber 1025 (forming a high pressure area), and sucking fluid outside the first chamber 1024 (forming a low pressure area). At this time, the bidirectional switching valve 208 is rotated, so that the drug solution enters the second drug solution chamber 2092 from the drug bag 101 through the second drug conduit 207, and passes through the first check valve 1031 (which is opened at this time) to the infusion port 105. Since the first medical fluid chamber 2091 has a second check valve 1032 (which is closed at this time), the medical fluid cannot enter the first medical fluid chamber 2091 after flowing out of the first check valve 1031. The bidirectional switching valve 208 is arranged at the cross connection part of the first medicine conduit 206 and the second medicine conduit 207, the valve core of the bidirectional switching valve 208 is provided with an outlet and an inlet, and can be selectively communicated with the first medicine conduit 206 or the second medicine conduit 207, the liquid medicine enters the liquid medicine cavity from passive to active through active control, under the condition that the pump pressure of the electroosmotic flow pump 102 is small, the liquid medicine in the medicine bag 101 can be directly conveyed to the infusion port 105 through the medicine conduit and the liquid medicine cavity by rotating the bidirectional switching valve 208, and the liquid medicine in the liquid medicine cavity is driven to flow to the infusion port 105, so that the active conveying of the liquid medicine is realized, the efficient conveying of the liquid medicine is ensured, and the performance requirement on the electroosmotic flow pump is reduced.

When a negative voltage is applied to the first porous electrode 1022 and a positive voltage is applied to the second porous electrode 1023, fluid flows from the second chamber 1025 to the first chamber 1024, the outer membrane of the second chamber 1025 and the outer membrane of the first chamber 1024 move rightward at the same time, the fluid outside the first chamber 1024 is squeezed (forming a high pressure area), and the fluid outside the second chamber 1025 is sucked (forming a low pressure area). At this time, the bi-directional switching valve 208 is rotated to allow the drug solution to enter the first drug solution chamber 2091 from the drug bag 101 through the first drug conduit 206, pass through the second check valve 1032 (opened at this time) to the infusion port 105, and cannot flow back through the first check valve 1031 (closed at this time) to enter the second drug solution chamber 2092.

It should be noted that, in some embodiments of the present utility model, the charges in the porous medium 1021 may be set to be positive, and when a positive voltage is applied to the first porous electrode 1022 and a negative voltage is applied to the second porous electrode 1023, the fluid flows from the second cavity 1025 to the first cavity 1024. When a negative voltage is applied to the first porous electrode 1022 and a positive voltage is applied to the second porous electrode 1023, fluid flows from the first chamber 1024 to the second chamber 1025, and such an adjustment is within the scope of the present application.

Those skilled in the art will appreciate that all or part of the steps in implementing the methods of the embodiments described above may be implemented by a program stored in a memory, including instructions for causing a control unit (which may be a single-chip microcomputer, a chip or the like) or a control device (such as a processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned memory includes: a U-disk, a removable hard disk, a Read-only memory (ROM), a random access memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The above embodiments are only for illustrating the main idea of the present application, and are not limiting of the present application. While the present application has been described in detail with reference to the embodiments, those skilled in the art will understand that various combinations, modifications, or equivalents of the technical solutions of the present application may be made without departing from the spirit and scope of the technical solutions of the present application, and all such modifications are intended to be encompassed within the scope of the claims of the present application.

The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An electroosmotic flow pump system comprising an electroosmotic flow pump and a conduit in communication with the electroosmotic flow pump;

the electroosmotic flow pump includes:

at least one electroosmosis unit comprising two porous electrodes and a porous medium between the two porous electrodes;

the membrane is arranged at the outer sides of the two porous electrodes, the membrane/the electroosmosis unit is arranged at the outer sides of the two porous electrodes, the working fluid and the pumping fluid of the electroosmosis flow pump are respectively arranged at the inner side and the outer side of the membrane,

the working fluid pushes the diaphragm to move to one side under the action of the two porous electrodes, and drives the pumping fluid to flow to the one side through the diaphragm.

2. Electroosmotic flow pump system according to claim 1, characterized in that in case the electroosmotic flow pump comprises a plurality of the electroosmotic units, a plurality of the electroosmotic units are connected in series and/or in parallel.

3. The electroosmotic flow pump system according to claim 1, wherein the membrane includes a solid membrane and a liquid membrane, and wherein both the solid membrane and the liquid membrane are incompatible with the working fluid and the pumping fluid.

4. The electroosmotic flow pump system according to claim 1, further comprising a pressure sensor, wherein the pressure sensor is disposed between the membrane and the two porous electrodes, respectively.

5. The electroosmotic flow pump system according to any one of claims 1 to 4, wherein the circuit includes:

the first pipeline is arranged on the outer side of one electrode side diaphragm of the electroosmotic flow pump and is respectively communicated with the medicine bag and the infusion port;

the second pipeline is arranged on the outer side of the other electrode side diaphragm of the electroosmotic flow pump and is respectively communicated with the medicine bag and the infusion port;

the control valve module is arranged on the first pipeline and the second pipeline and used for controlling the on-off of the first pipeline and the second pipeline.

6. The electroosmotic flow pump system according to claim 5, said control valve module including a one-way valve, said one-way valve being provided at both an end of said first conduit communicating with said fluid port and an end of said second conduit communicating with said fluid port.

7. The electroosmotic flow pump system according to claim 6, wherein the end portion of the first tube that communicates with the medicine bag and the end portion of the second tube that communicates with the medicine bag are each provided with the one-way valve, or the end portion of the first tube that communicates with the medicine bag and the end portion of the second tube that communicates with the medicine bag are communicated by a valve that is switchable in two directions.

8. The electroosmotic flow pump system according to claim 7, wherein said one-way valve includes at least one of a solenoid valve, a diaphragm valve, a spring valve, and a wobble valve.

9. The electroosmotic flow pump system according to claim 5, wherein said control valve module further includes a power source connected to two porous electrodes of said electroosmotic flow pump or directly connected to two porous electrodes of said electroosmotic flow pump by a controller.

10. The electroosmotic flow pump system according to claim 9, wherein the power supply is configured as an ac power supply or a dc power supply, and the controller controls the power supply to output positive and negative voltages or positive and negative current signals to the two porous electrodes.

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