JP2008212805A - Conduction structure of electro-osmosis material, liquid feeder and fuel cell type power generating set, and manufacturing method of electric equipment and liquid feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conduction structure of an electro-osmosis material which is capable of enhancing the performance of an electro-osmosis flow pump, to provide a feeder equipped with the structure, to provide a fuel cell type power generating set equipped with the feeder and to provide a manufacturing method of an electric equipment and a feeder equipped with the fuel cell type power generating set. <P>SOLUTION: The conduction structure of the electro-osmosis material has an electro-osmosis material where the electrodes are installed on both surfaces, a holder where the hollow space to store the electro-osmosis material is formed and a lead-out electrodes conductive electrically with electrodes of both surfaces of the electro-osmosis material, which are pinched from both surfaces of the holder. In the lead-out electrode, an opening spreading to the outer periphery or the outside of the outer periphery of the electro-osmosis material is formed. In the circumference part of the openings 53a, 54a, electrode connection parts 55A, 56A conducting electrically with the electro-osmosis material 51, which enters the inner side of the circumferential part, is installed and is bonded by an electro-conductive adhesive. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a conductive structure of an electroosmotic material used for an electroosmotic flow pump using an electroosmotic phenomenon, a liquid feeding device having the structure, a fuel cell type power generating device having the liquid feeding device, and a fuel cell type power generating device. The present invention relates to a method of manufacturing an electronic device and a liquid feeding device.

  In recent years, fuel cells have attracted attention as clean power sources with high energy conversion efficiency, and have been widely put into practical use in fuel cell vehicles, portable devices, electric houses, and the like. Fuel cells are classified into two types: reforming and direct fuel. The reforming method is a method in which hydrogen is generated from fuel and water in a reformer and then hydrogen is supplied to the power generation cell. The direct fuel method is a method in which fuel and water are supplied to the power generation cell without reforming. It is.

  In any case, a pump is used as a power source for feeding fuel and water. There are pumps that operate mechanically, such as centrifugal, volume rotary, and volume reciprocating, but a liquid delivery device that has an electroosmotic flow pump that feeds liquid without having a mechanical movable part has been devised. (For example, refer to Patent Document 1).

  The electroosmotic flow pump uses an electroosmotic phenomenon, and includes an electroosmotic material made of a dielectric filled in a tube material, and electrodes arranged on the upstream side and the downstream side of the electroosmotic material. An electroosmotic material consists of dielectrics, such as a silica fiber arrange | positioned in the flow direction of a pipe material, for example.

The electroosmotic pump operates on the following principle. That is, when a liquid comes into contact with the electroosmotic material (dielectric), the surface of the electroosmotic material is charged, counter ions in the liquid gather near the contact interface, and the charge becomes excessive. Here, when an electric field is generated in the electroosmotic material by applying a voltage between the electrodes, counter ions in the liquid move, and the entire liquid flows due to the viscosity of the liquid. For example, in electroosmosis material is silica, when the liquid is a mixture of water and methanol, the surface of the silica, "-Si-OH" (a silanol group) is generated, the silanol groups Si-O ^- next The surface of the silica is negatively charged, positive ions (counter ions) in the liquid gather near the interface, and the positive charge becomes excessive in the liquid. When a voltage is applied between the electrodes, excess positive charge moves toward the cathode, and the entire liquid flows toward the cathode due to viscosity.
An electroosmotic pump driven by such a principle has no movable part, has a simple structure, can be miniaturized, has no pulsation, no noise, and the like.
JP 2006-22807 A

  12 is an exploded perspective view showing a liquid feeding device 140 under development (pending) by the applicant for comparison, FIG. 13 is a cross-sectional view taken along arrow XII-XII in FIG. 12, and FIG. It is an enlarged view of 13 XIII part.

  The liquid feeding device 140 includes an electroosmotic flow pump 150 provided with extraction electrodes 153 and 154 at both ends of a holder 152 that houses an electroosmotic material 151, and an upstream flow channel structure 160 that forms a flow channel on the upstream side thereof. And a downstream channel structure 170 forming a downstream channel. As shown in FIG. 13, the upstream flow channel structure 160 and the downstream flow channel structure 170 are bonded to the extraction electrodes 153 and 154 by non-conductive adhesives 169 and 179.

  Openings 153 a and 154 a having a diameter smaller than that of the electroosmotic material 151 are formed in the extraction electrodes 153 and 154. As shown in FIG. 13, the lead electrodes 153 and 154 are bonded to the holder 152 and the electrodes 151a and 151b with the conductive adhesives 152b and 152b, thereby fixing the position of the electroosmotic material 151 in the axial direction. At the same time, as shown in FIG. 14, the electrodes 151 a and 151 b provided at both ends of the electroosmotic material 151 and the extraction electrodes 153 and 154 can be made conductive at the peripheral portions of the openings 153 a and 154 a.

  In general, the flow rate of the electroosmotic flow pump depends on the cross-sectional area of the electroosmotic material. However, in the above structure, since the outer periphery of the electroosmotic material 51 overlaps the peripheral edge of the openings 153a and 154a, the flow passage cross-sectional area of the electroosmotic material 51 is limited to the size of the openings 153a and 154a, and the pump performance is reduced. There was a problem of lowering.

  An object of the present invention is to provide a conductive structure for an electroosmotic material capable of improving the performance of an electroosmotic flow pump, a liquid feeding device having the structure, a fuel cell type power generating device using the liquid feeding device, and the fuel cell It is providing the manufacturing method of the electronic device provided with the type | mold power generation device, and a liquid feeding apparatus.

  In order to solve the above problems, the invention according to claim 1 is an electroosmotic material having electrodes provided on both sides thereof, a holder in which an inner space for accommodating the electroosmotic material is formed, and both sides of the holder. An extraction electrode that is sandwiched between and connected to the electrodes on both sides of the electroosmotic material, and the extraction electrode has an opening that extends to the same outer periphery as the outer periphery of the electroosmotic material or to the outside of the outer periphery. The electrode of the material and the lead electrode are a conductive structure of an electroosmotic material, which is bonded by a conductive adhesive.

  The invention described in claim 2 is the electroosmotic material conducting structure according to claim 1, wherein the electroosmotic material conducts into the inside of at least a part of the peripheral portion of the opening of the extraction electrode, and is electrically connected to the electroosmotic material. The electrode connection part which performs is provided.

  A third aspect of the present invention is the electroosmotic material conducting structure according to the second aspect, wherein the electrode connection portion is inserted into the outer periphery of the electroosmotic material.

  According to a fourth aspect of the present invention, there is provided a conductive structure for an electroosmotic material according to the second or third aspect, wherein the electrode connecting portion is composed of one or a plurality of protrusions.

  A fifth aspect of the present invention is the electroosmotic material conducting structure according to the fourth aspect of the present invention, wherein the protrusion includes an inlet portion including two or more protrusions.

  The invention described in claim 6 is the electroosmotic material conducting structure according to claim 4, wherein the protrusion is provided with a through hole.

  The invention described in claim 7 is the conductive structure for electroosmotic material according to claim 2 or 3, wherein the electrode connection portion is made of only a conductive adhesive.

  The invention according to claim 8 is the conductive structure of the electroosmotic material according to any one of claims 2 to 7, wherein the electrode connection portion is provided at least at three locations. To do.

  The invention according to claim 9 is the electroosmotic material conducting structure according to any one of claims 1 to 8, wherein a side surface of the electroosmotic material is adhered to the inside of the holder. Features.

  The invention according to claim 10 is the conductive structure of the electroosmotic material according to any one of claims 1 to 9, wherein the holder and the extraction electrode are bonded by a non-conductive adhesive. It is characterized by being.

  According to an eleventh aspect of the present invention, there is provided an electroosmotic material in which electrodes are provided on both sides, a holder in which an inner space for accommodating the electroosmotic material is formed, the holder is sandwiched from both sides, A lead electrode that is electrically connected to the electrodes on both sides, and a flow channel structure that forms a liquid flow channel on the upstream side and the downstream side of the electroosmotic material, and the lead electrode has an outer periphery of the electroosmotic material An opening that extends to the outside of the outer periphery is formed, and the electrode of the electroosmotic material and the extraction electrode are mounted on a power generation device including a fuel cell, which is bonded by a conductive adhesive It is a liquid feeding device.

  A twelfth aspect of the invention is a liquid feeding device mounted on a power generation device including the fuel cell according to the eleventh aspect, and enters at least a part of the peripheral edge of the opening of the extraction electrode. In addition, an electrode connecting portion that is electrically connected to the electroosmotic material is provided.

  A thirteenth aspect of the invention is a fuel cell type power generation device comprising the liquid feeding device according to the eleventh or twelfth aspect and a power generation cell to which fuel is supplied by the liquid feeding device. .

  An invention according to claim 14 is provided with the fuel cell type power generation device according to claim 13 and an electronic device main body that operates by electricity generated by the fuel cell type power generation device. It is.

  The invention according to claim 15 includes a step of forming electrodes on both surfaces of the electroosmotic material, a step of accommodating the electroosmotic material in a holder formed with an inner space, both surfaces of the holder, and both surfaces of the holder. A step of adhering a lead electrode connected to electrodes on both sides of the electroosmotic material, and a step of adhering the electrode of the electroosmotic material and the lead electrode to the lead electrode. In the method of manufacturing a liquid feeding device, an opening is formed which extends to the outer periphery of the permeation material or extends to the outside of the outer periphery, and the electrode of the electroosmosis material and the extraction electrode are bonded with a conductive adhesive. is there.

  The invention according to claim 16 is the conductive structure of the electroosmotic material according to claim 15, wherein the step of bonding the electrode of the electroosmotic material and the extraction electrode drops the conductive adhesive. Including a process.

  The invention described in claim 17 is the conductive structure for electroosmotic material according to claim 15, wherein the step of bonding the both surfaces of the holder and the extraction electrode is bonded by a non-conductive adhesive. It is characterized by.

  According to the present invention, the performance of the electroosmotic flow pump can be improved.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

〔Electronics〕
FIG. 1 is a block diagram of the electronic device 1000. The electronic device 1000 is connected to the fuel cell type fuel cell power generator 1, a DC / DC converter 904 that converts electric energy generated by the fuel cell power generator 1 into an appropriate voltage, and the DC / DC converter 904. Secondary battery 905, a control unit 906 for controlling them, and an electronic device body 901 to which electric energy is supplied from a DC / DC converter 904.

The fuel cell power generator 1 generates electrical energy and outputs it to the DC / DC converter 904, as will be described later. The DC / DC converter 904 converts the electric energy generated by the fuel cell type power generation device 1 into an appropriate voltage and then supplies it to the electronic device main body 901 and the control unit 906. A function of charging the generated electric energy to the secondary battery 905 and supplying the electric energy stored in the secondary battery 905 to the electronic device main body 901 and the control unit 906 when the fuel cell power generation device 1 is not operating. Can also be fulfilled. The control unit 906 controls the fuel cell power generator 1 and the DC / DC converter 904 so that electric energy is stably supplied to the electronic device main body 901.
Next, the fuel cell type power generator 1 will be described in detail.

[Fuel cell power generator]
FIG. 2 is a block diagram of the fuel cell type power generation apparatus 1. The fuel cell type power generation device 1 includes fuel cartridges 2 and 2, liquid feeding devices 40 and 40, a flow path control unit 100, a microreactor 6 and a power generation cell 20, an air pump 30, and the like. The fuel cell type power generator 1 is a system having two fuel cartridges 2 and 2.

  The flow path control unit 100 is composed of, for example, a multilayer substrate in which a plurality of substrates are stacked, and the liquid flow control device 100, the microreactor 6, the power generation cell 20, and the air pump 30 are surface-mounted on the flow path control unit 100. The flow path control unit 100 includes (incorporates) microvalves 33 to 35 and flow rate sensors 36 to 38.

  The microvalve 33 is an on-off valve that allows or blocks the flow of the mixed liquid flowing from the liquid feeding device 40 to the vaporizer 7 by opening and closing the valve. The micro valve 34 is a control valve (variable valve) that controls the flow rate of air flowing from the air pump 30 to the carbon monoxide remover 9 in the micro reactor 6. The micro valve 35 is a control valve (variable valve) that controls the flow rate of air flowing from the air pump 30 to the combustor 10 in the micro reactor 6.

  The flow rate sensor 36 is provided in the flow path from the fuel cartridges 2 and 2 to the vaporizer 7 in the microreactor 6 and detects the flow rate of the mixed liquid flowing from the fuel cartridges 2 and 2 to the vaporizer 7. The flow rate sensor 37 is provided in the flow path from the air pump 30 to the carbon monoxide remover 9 in the microreactor 6 and detects the flow rate of air flowing from the air pump 30 to the carbon monoxide remover 9. The flow sensor 38 is provided in a flow path from the air pump 30 to the combustor 10 in the microreactor 6 and detects the flow rate of air flowing from the air pump 30 to the combustor 10 in the microreactor 6.

  A fuel / water mixture is stored in the fuel cartridge 2. Fuel discharge holes are formed in the wall surfaces of the fuel cartridges 2 and 2. A pipe leading to the liquid delivery device 40 is inserted into the fuel discharge hole.

A check valve 2a is provided in the fuel discharge hole. The check valve 2a is, for example, a duckbill valve in which a material having flexibility and elasticity (for example, elastomer) is formed in a duckbill shape, with the duckbill-shaped tip facing the inside of the fuel cartridges 2 and 2. It is inserted. The check valve 2a can prevent the liquid mixture from leaking out of the fuel cartridge 2 from the fuel discharge hole.
The fuel discharge hole is provided so as to face the liquid feeding device 40, and the fuel cartridges 2 and 2 can be attached to and detached from the liquid feeding device 40.

  Here, as will be described later, the liquid feeding device 40 will be described with an example in which the liquid mixture is sucked from the fuel cartridge 2 and fed to the vaporizer 7 in the microreactor 6. However, the liquid feeding device 40 is limited to the above place. Instead, it can be used in the same way for the part of the system that feeds liquid.

  As shown in FIG. 1, the microreactor 6 is a unit in which a vaporizer 7, a reformer 8, a carbon monoxide remover 9, and a combustor 10 are unitized. A mass device 8 leads to a carbon monoxide remover 9. The microreactor 6 is accommodated in a vacuum insulation package 11.

  Six ports 12 to 17 are provided on the surface of the microreactor 6 facing the flow path control unit 100. The microreactor first port 12 is an input port leading to the vaporizer 7, the microreactor second port 13 is an input port leading to the carbon monoxide remover 9, the microreactor third port 14 is an input port leading to the combustor 10, and the microreactor fourth port 15 Is an output port from the combustor 10, the microreactor fifth port 16 is an input port leading to the combustor 10, and a microreactor sixth port 17 is an output port from the carbon monoxide remover 9.

  The power generation cell 20 is obtained by unitizing a fuel electrode 21 carrying a catalyst, an oxygen electrode 22 carrying a catalyst, and an electrolyte membrane 23 sandwiched between the fuel electrode 21 and the oxygen electrode 22.

  Four ports 24 to 27 are provided on the surface of the power generation cell 20 facing the flow path control unit 100. The power generation cell first port 24 is an input port leading to the fuel electrode 21, the power generation cell second port 25 is an output port from the fuel electrode 21, the power generation cell third port 26 is an input port leading to the oxygen electrode 22, and the power generation cell fourth port. Reference numeral 27 denotes an output port from the oxygen electrode 22.

  As shown in FIG. 2, an air filter 31 is provided on the suction side of the air pump 30, and external air is sucked into the air pump 30 through the air filter 31. The air pump 30 is provided with a discharge port 32, and the air sucked into the air pump 30 is discharged from the discharge port 32 and supplied to each part through the flow path in the flow path control unit 100.

[Operation of fuel cell power generator]
Next, the operation of the fuel cell type power generator 1 will be described.
First, the liquid mixture is fed from the fuel cartridge 2 to the vaporizer 7 by the action of the liquid feeding device 40.

  On the other hand, when the air pump 30 is activated, external air is sucked into the air pump 30 through the air filter 31, and the sucked air is sent from the exhaust port 32 to the carbon monoxide remover 9, the combustor 10, and the oxygen electrode 22. .

The liquid mixture sent to the vaporizer 7 is vaporized, and the vaporized fuel / water mixture is sent to the reformer 8. In the reformer 8, hydrogen and carbon dioxide are generated from the gas mixture supplied from the vaporizer 7 by the reforming reaction catalyst, and a trace amount of carbon monoxide is also generated. When the mixed solution in the fuel cartridge 2 is a mixed solution of methanol and water, a catalytic reaction such as chemical reaction formulas (1) and (2) occurs in the reformer 8.
CH ₃ OH + H ₂ O → 3H ₂ + CO ₂ (1)
H ₂ + CO ₂ → H ₂ O + CO (2)

The air-fuel mixture generated by the reformer 8 is supplied to the carbon monoxide remover 9 and mixed with the air supplied from the discharge port 32 of the air pump 30 via the microreactor second port 13. In the carbon monoxide remover 9, the carbon monoxide gas in the gas mixture is preferentially oxidized (burned) by the selective oxidation reaction catalyst as shown in the chemical reaction formula (3), and the carbon monoxide is removed.
2CO + O ₂ → 2CO ₂ (3)

  The air-fuel mixture from which carbon monoxide has been removed contains hydrogen gas, and the air-fuel mixture is supplied from the microreactor sixth port 17 to the fuel electrode 21 of the power generation cell 20 via the power generation cell first port 24. The Air is supplied to the oxygen electrode 22 from the discharge port 32 of the air pump 30 via the power generation cell third port 26. Then, the hydrogen in the gas mixture supplied from the microreactor sixth port 17 to the fuel electrode 21 via the power generation cell first port 24 is converted into oxygen and electricity in the air supplied to the oxygen electrode 22 through the electrolyte membrane 23. By chemical reaction, electric power is generated between the fuel electrode 21 and the oxygen electrode 22.

When the electrolyte membrane 23 is a hydrogen ion permeable electrolyte membrane (for example, a solid polymer electrolyte membrane), a reaction represented by the following formula (4) occurs in the fuel electrode 21, and is generated at the fuel electrode 21. Hydrogen ions permeate the electrolyte membrane 23, and a reaction represented by the following formula (5) occurs at the oxygen electrode 22.
H ₂ → 2H ⁺ + 2e ⁻ (4)
2H ⁺ + 1 / 2O ₂ + 2e ⁻ → H ₂ O (5)

  Unreacted air at the oxygen electrode 22 is discharged to the outside from the power generation cell fourth port 27. The air-fuel mixture containing unreacted hydrogen in the fuel electrode 21 is sent to the combustor 10 from the power generation cell second port 25 as an output port via the microreactor fifth port 16. Further, air is supplied to the combustor 10 from the discharge port 32 of the air pump 30 via the microreactor third port 14. Then, in the combustor 10, hydrogen is oxidized to generate combustion heat, and the vaporizer 7, the reformer 8, and the carbon monoxide remover 9 are heated by the combustion heat. Then, an air-fuel mixture containing various products is discharged to the outside from the microreactor fourth port 15 which is an output port of the combustor 10.

[Liquid feeding device]
Here, the detailed structure of the liquid feeding device 40 will be described. 3 is a perspective view of the liquid delivery device 40 as viewed from the fuel cartridge 2 side, FIG. 4 is an exploded perspective view of the liquid delivery device 40 as viewed from the fuel cartridge 2 side, and FIG. 5 is a cross-sectional view taken along arrows VV in FIG. It is.

  As shown in FIGS. 3 to 5, the liquid feeding device 40 is formed by joining an electroosmotic flow pump 50, an upstream channel structure 60, and a downstream channel structure 70.

  6 is a perspective view of the electroosmotic flow pump 50, FIG. 7 is a plan view of the electroosmotic flow pump 50, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. The electroosmotic flow pump 50 includes an electroosmotic material 51, a holder 52, and extraction electrodes 53 and 54.

The electroosmotic material 51 is formed of a dielectric porous material (for example, a porous ceramic), a fiber material, or a particle filler in a plate shape, here a disk shape, and has liquid absorbency. Electrodes 51a and 51b are formed on both surfaces of the electroosmotic material 51 by sputtering or vapor deposition of platinum or the like.
Then, the electroosmotic material 51 is stored in the holder 52 with the side surfaces in close contact.

  The holder 52 is made of an insulator, and an inner space 52 a for accommodating the electroosmotic material 51 is formed. The thickness of the holder 52 is substantially the same as the thickness of the electroosmotic material. By accommodating the electroosmotic material 51 in the inner space 52a, the radial position of the electroosmotic material 51 is fixed. And you may make it adhere | attach reliably between the side surface of the electroosmotic material 51, and the holder 52 with a nonelectroconductive adhesive agent. Thereby, sealing performance can be improved. In addition, a buffer material may be filled between the electroosmotic material 51 and the holder 52 in order to improve impact resistance. Both surfaces of the holder 52 are bonded to the extraction electrodes 53 and 54 by non-conductive adhesives 52b and 52b.

  The extraction electrodes 53 and 54 have the same shape and are arranged on both surfaces of the electroosmotic material 51 and the holder 52. As the material of the extraction electrodes 53 and 54, iron, copper alloy, SUS, or the like can be used, and gold plating is performed to prevent an oxidation reaction due to contact with the electrode and the mixed solution.

In the extraction electrodes 53 and 54, openings 53a and 54a having a diameter equal to or larger than the diameter of the electroosmotic material 51 are formed. That is, the extraction electrodes 53 and 54 are formed with openings that are the same as the outer periphery of the electroosmotic material 51 or that extend to the outside of the outer periphery.
Electrode connection portions 55A and 56A projecting inward of the openings 53a and 54a are provided at a plurality of locations (three locations in the drawing) of the peripheral portions of the openings 53a and 54a.
Further, in this embodiment, as shown in FIG. 7, the protruding electrode connection portions 55 </ b> A and 56 </ b> A enter the inside of the outer periphery of the electroosmotic material 51.

  The electrode connecting portion 55A includes a protruding portion 57a and a protruding portion 57b that are disposed adjacent to each other, and is adhered to the electrode 51a by dropping a conductive adhesive 51c into a gap (cove portion) 57c. Thereby, as shown in FIG. 6, the electrode 51a and the extraction electrode 53 are electrically connected.

Similarly, the lower (back side) electrode connecting portion 56A is composed of a protruding portion 58a and a protruding portion 58b disposed adjacent to each other, and the electrode 51b is dropped by dropping a conductive adhesive 51d into the gap (cove portion) 58c. And glued. Thereby, the electrode 51b and the extraction electrode 54 are electrically connected.
At this time, the gaps 57c and 58c function as a pool of the conductive adhesives 51c and 51d, and the conductive adhesive reliably spreads into the gaps 57c and 58c due to its wettability, so that dripping accuracy is not so necessary. .
As the conductive adhesives 51c and 51d, for example, Dotite FA-730, XA-819A manufactured by Fujikura Kasei can be used.
The position of the electroosmotic material 51 in the axial direction is fixed by bonding both surfaces of the electroosmotic material 51 to the extraction electrodes 53 and 54. In order to more securely fix the electroosmotic material 51, it is desirable to provide the electrode connection portions 55A and 56A at three or more positions on the peripheral edge portions of the openings 53a and 54a.
Here, the electrode connection portions 55A and 56A are provided in the same direction in the circumferential direction, but may be provided such that the electrode connection portions are alternately arranged in plan view.

The upstream flow path structure 60 is provided on the fuel cartridge 2 side with respect to the electroosmotic flow pump 50.
A recess 61 is provided on the surface of the upstream flow path structure 60 on the electroosmotic flow pump 50 side. An introduction hole 62 passes through the center of the recess 61.
An introduction pipe 66 is provided at the center on the surface of the upstream flow path structure 60 on the fuel cartridge 2 side. The inner space of the introduction pipe 66 is connected to the introduction hole 62, and the introduction pipe 66 is inserted into the duckbill valve of the fuel cartridge 2, 2, thereby providing an introduction flow path for introducing the mixed liquid into the electroosmotic flow pump 50. .
The surface of the upstream flow path structure 60 on the electroosmotic flow pump 50 side is joined to the extraction electrode 53 by a non-conductive adhesive 69 at the outer peripheral portion of the recess 61.

The downstream flow path structure 70 is provided on the flow path control unit 100 side with respect to the electroosmotic flow pump 50.
A recess 71 is provided on the surface of the downstream flow path structure 70 on the electroosmotic flow pump 50 side. A discharge hole 72 passes through the bottom of the recess 71 in the center.

  A discharge pipe 76 is provided at the center on the surface of the downstream flow channel structure 70 on the flow channel control unit 100 side. The inner space of the discharge pipe 76 is connected to the discharge hole 72, and the discharge pipe 76 is connected to a flow path connected to the microvalve 33 of the flow path control unit 100, and becomes a flow path for the mixed liquid.

  The surface on the electroosmotic flow pump 50 side of the downstream channel structure 70 is bonded to the extraction electrode 54 by a non-conductive adhesive 79 at the outer peripheral portion of the recess 71.

[Assembly method of liquid feeding device]
Next, a method for assembling the liquid feeding device 40 will be described.
First, in a state in which the electroosmotic material 51 is inserted into the inner space 52a of the holder 52, for example, a non-conductive adhesive 52b, 52b is applied to an adhesive portion with a silk screen, and a lead electrode is formed by the non-conductive adhesive 52b, 52b. 53 and 54 are bonded to the holder 52. In this state, since the electrode connection portions 55A and 56A and the electroosmotic material 51 are engaged, the position of the electroosmotic material 51 in the axial direction is fixed. As described above, the side surface of the electroosmotic material 51 and the holder 52 may be securely bonded with a non-conductive adhesive.

Next, the conductive adhesive 51c is dropped into the gap 57c of the electrode connecting portion 55A, the conductive adhesive 51d is dropped into the gap 58c of the electrode connecting portion 56A, and the electrode 51a and the extraction electrode 53 are bonded together. 51b and the extraction electrode 54 are adhered.
The method of adhering by dripping is simpler than the method of adhering by applying an adhesive with a silk screen using a mask, and the adhering step with the non-conductive adhesive between the lead electrodes 53 and 54 and the holder 52 described above. Interference can be eliminated.

  Thereafter, the upstream flow channel structure 60 and the extraction electrode 53 are bonded by a non-conductive adhesive 69, and the downstream flow channel structure 70 and the extraction electrode 54 are bonded by a non-conductive adhesive 79. Thus, the assembly of the liquid feeding device 40 is completed.

  In general, the conductive adhesive has a weaker adhesive force than the non-conductive adhesive, but in the present embodiment, the extraction electrodes 53 and 54 and the electrodes 51a and 51b are engaged at the electrode connection portions 55A and 56A. Since the adhesive strength is not so required, the conductivity can be ensured by using a conductive adhesive having a weak adhesive force.

  It should be noted that non-conductive adhesion is used for adhesion between the holder 52 and the extraction electrodes 53 and 54 that require adhesive strength, and adhesion between the extraction electrodes 53 and 54 and the upstream flow path structure 60 and the downstream flow path structure 70. An agent can be used, and adhesive strength can be secured.

[Operation of liquid feeding device]
Next, operation | movement of the liquid feeding apparatus 40 is demonstrated.
First, when the introduction pipe 66 is inserted into the check valve 2 a of the fuel cartridge 2, 2, the liquid mixture in the fuel cartridge 2, 2 is supplied to the liquid feeding device 40. Then, the mixed solution penetrates into the electroosmotic material 51.

When a voltage is applied so that the extraction electrode 53 serves as an anode and the extraction electrode 54 serves as a cathode while the mixed solution penetrates into the electroosmotic material 51, the mixed solution in the electroosmosis material 51 obtains a driving force on the cathode side. Moving. As a result, the liquid mixture is fed from the extraction electrode 53 side to the extraction electrode 54 side.
The liquid mixture sent to the extraction electrode 54 side flows from the discharge hole 72 to the discharge pipe 76.

  According to the liquid feeding device 40 of the present embodiment, since the electroosmotic material 51 is fixed only by the electrode connection portions 55A and 56A, the flow path cross-sectional area of the electroosmotic material 51 can be increased, and the pump performance is sufficient. Can be demonstrated.

<Modification 1>
FIG. 9 is a plan view showing the electrode connecting portion 55B (56B) of the extraction electrode 53 (54) according to the first modification of the present embodiment. As shown in FIG. 9, the electrode connecting portion 55B (56B) includes a single protrusion 57d (58d). By dropping the conductive adhesive 51c (51d) on both sides of the protrusion 57d (58d), the electrode 51a (51b) and the extraction electrode 53 (54) can be electrically connected.
At this time, the conductive adhesive 51c (51d) spreads on both sides of the protrusion 57d (58d) due to its wettability, so that the dripping accuracy is not so necessary.

  Also in this modification, since the electroosmotic material 51 is fixed only by the electrode connection portions 55B and 56B, the flow passage cross-sectional area of the electroosmotic material 51 can be increased, and the pump performance can be sufficiently exhibited. it can.

<Modification 2>
FIG. 10 is a plan view showing the electrode connecting portion 55C (56C) of the extraction electrode 53 (54) according to the second modification of the present embodiment. As shown in FIG. 10, the electrode connecting portion 55C (56C) includes a single protrusion 57e (58e), but unlike the first modification, the protrusion 57e (58e) includes a through hole 57f. (58f) is provided. Also in this embodiment, as shown in FIG. 10, the protruding electrode connection portion 57 e (58 e) (through hole 57 f (58 f)) enters the inside of the outer periphery of the electroosmotic material 51.
By dropping the conductive adhesive 51c (51d) into the through hole 57f (58f), the electrode 51a (51b) and the extraction electrode 53 (54) can be electrically connected.

Also in this modified example, since the electroosmotic material 51 is conducted only at the electrode connecting portions 55C and 56C, the flow passage cross-sectional area of the electroosmotic material 51 can be increased, and the pump performance can be sufficiently exhibited. it can.
Moreover, since the through-hole 57f (58f) plays a role as a pool of the conductive adhesive 51c (51d), the dropping process can be performed more easily and conduction can be ensured.

<Modification 3>
FIG. 11 is a plan view showing an electrode connection portion 55D (56D) of the extraction electrode 53 (54) according to a third modification of the present embodiment. As shown in FIG. 11, the conductive adhesive 51 c (51 d) is dropped without providing a special protrusion so that the lead electrode 53 (54) and the electrode 51 a (51 b) are electrically connected. The conductive adhesive 51c (51d) spreads from the inner wall portion of the opening of the extraction electrode 53 (54) to the electrode 51a (51b) due to its wettability, so that the extraction electrode 53 (54) and the electrode 51a (51b) are electrically connected. be able to.
In this embodiment, the area of the protrusion can be effectively used as the cross-sectional area of the flow path, so that the pump performance can be sufficiently exhibited.
Further, in this case, since the electrode connection portion 55D (56D) has no protrusion due to the member of the extraction electrode 53 (54), concentration of stress applied to the electroosmotic material 51 can be suppressed.
In the case of this modification, it is preferable that the side surface of the electroosmotic material 51 and the holder 52 are bonded with a non-conductive adhesive so as to be securely fixed in the axial direction. Moreover, you may make it use together with said embodiment (FIGS. 3-8) provided with a projection part as electrode connection part 55D (56D), or a modification.
Similarly, the above embodiment (FIGS. 3 to 8) and other modifications may be used in combination with other modifications or the above embodiment.
Moreover, in the said embodiment and the modification, although the shape of the electroosmotic material 51 was made into the disk shape, it cannot be overemphasized that other shapes, such as a rectangle, may be sufficient as an outer periphery.

1 is a block diagram of an electronic device 1000. FIG. 1 is a block diagram of a fuel cell power generation device 1. FIG. FIG. 4 is a perspective view of the liquid feeding device 40 as viewed from the fuel cartridge 2 side. FIG. 3 is an exploded perspective view of the liquid feeding device 40 as viewed from the fuel cartridge 2 side. It is a VV arrow sectional view of Drawing 3. 3 is a perspective view of an electroosmotic pump 50. FIG. 3 is a plan view of the electroosmotic flow pump 50. FIG. It is VIII-VIII arrow sectional drawing of FIG. It is a top view which shows the electrode connection part 55B (56B) of the extraction electrode 53 (54) which concerns on the 1st modification of this embodiment. It is a top view which shows electrode connection part 55C (56C) of the extraction electrode 53 (54) which concerns on the 2nd modification of this embodiment. It is a top view which shows electrode connection part 55D (56D) of the extraction electrode 53 (54) which concerns on the 3rd modification of this embodiment. It is a disassembled perspective view as a comparative example which shows the liquid feeding apparatus 140 which the present applicant is developing (pending). It is XII-XII arrow sectional drawing of FIG. It is an enlarged view of the XIII part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fuel cell type power generation apparatus 2 Fuel cartridge 20 Power generation cell 40 Liquid supply apparatus 50 Electroosmotic flow pump 51 Electroosmotic material 51a, 51b Electrode 51c, 51d Conductive adhesive 52 Holder 52a Inner space 52b, 52b Nonconductive adhesive 53 , 54 Lead electrodes 53a, 54a Openings 55A, 56A Electrode connection portions 57c, 58c Gap (cove)
60 Upstream channel structure 70 Downstream channel structure 901 Electronic device main body 1000 Electronic device

Claims (17)

An electroosmotic material provided with electrodes on both sides;
A holder formed with an inner space in which the electroosmotic material is accommodated;
A lead electrode sandwiched from both sides of the holder and electrically connected to electrodes on both sides of the electroosmotic material;
Have
The lead electrode is formed with an opening that is the same as the outer periphery of the electroosmotic material or extends outside the outer periphery,
The conductive structure of the electroosmotic material, wherein the electrode of the electroosmotic material and the extraction electrode are bonded by a conductive adhesive.   The conduction of the electroosmotic material according to claim 1, wherein an electrode connection portion that enters the inside and conducts with the electroosmotic material is provided in at least a part of a peripheral edge portion of the opening of the extraction electrode. Construction.   The conductive structure for an electroosmotic material according to claim 2, wherein the electrode connecting portion is inserted to the inside of the outer periphery of the electroosmotic material.   The conductive structure for an electroosmotic material according to claim 2 or 3, wherein the electrode connecting portion is composed of one or a plurality of protrusions.   The conductive structure for an electroosmotic material according to claim 4, wherein the protrusion includes an inlet portion including two or more protrusions.   The conductive structure for an electroosmotic material according to claim 4, wherein the protrusion has a through hole.   The conductive structure for an electroosmotic material according to claim 2, wherein the electrode connection portion is made of only a conductive adhesive.   The conductive structure for an electroosmotic material according to any one of claims 2 to 7, wherein the electrode connection portion is provided at at least three locations.   The electroosmotic conductive structure according to any one of claims 1 to 8, wherein a side surface of the electroosmotic material is bonded to the inside of the holder.   The conductive structure for an electroosmotic material according to any one of claims 1 to 9, wherein the holder and the extraction electrode are bonded by a non-conductive adhesive. An electroosmotic material provided with electrodes on both sides;
A holder formed with an inner space in which the electroosmotic material is accommodated;
A lead electrode that sandwiches the holder from both sides and is electrically connected to electrodes on both sides of the electroosmotic material;
A flow channel structure that forms a liquid flow channel on the upstream side and the downstream side of the electroosmotic material;
Have
The lead electrode is formed with an opening that is the same as the outer periphery of the electroosmotic material or extends to the outside of the outer periphery,
The liquid feeding device mounted on a power generator including a fuel cell, wherein the electrode of the electroosmotic material and the extraction electrode are bonded with a conductive adhesive.   The power generation including a fuel cell according to claim 11, wherein an electrode connection portion that enters inside and is electrically connected to the electroosmotic material is provided at least at a part of a peripheral edge portion of the opening of the extraction electrode. Liquid feeding device mounted on the device.   13. A fuel cell type power generation device comprising: the liquid feeding device according to claim 11; and a power generation cell to which fuel is supplied by the liquid feeding device.   14. An electronic device comprising: the fuel cell type power generation device according to claim 13; and an electronic device main body that operates by electricity generated by the fuel cell type power generation device. Forming electrodes on both sides of the electroosmotic material;
Storing the electroosmotic material in a holder in which an inner space is formed;
Adhering both sides of the holder, and lead electrodes that sandwich the holder from both sides and are electrically connected to electrodes on both sides of the electroosmotic material;
Bonding the electrode of the electroosmotic material and the extraction electrode;
Including
The lead electrode is formed with an opening that is the same as the outer periphery of the electroosmotic material or extends to the outside of the outer periphery,
The method of manufacturing a liquid feeding device, wherein the electrode of the electroosmotic material and the extraction electrode are bonded with a conductive adhesive.   The method for manufacturing a liquid feeding device according to claim 15, wherein the step of bonding the electrode of the electroosmotic material and the extraction electrode includes a step of dropping the conductive adhesive.   The method of manufacturing a liquid feeding device according to claim 15, wherein the step of bonding the both surfaces of the holder and the extraction electrode is performed using a non-conductive adhesive.

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