JP3519529B2 - Hydrogen / oxygen generator - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention uses a solid electrolyte membrane as a diaphragm and electrolyzes while supplying pure water to the anode side of a bipolar electrode plate to supply oxygen gas from the anode side and from the cathode side. The present invention relates to a bipolar electrode hydrogen / oxygen generator for generating hydrogen gas.

[0002]

2. Description of the Related Art Conventionally, the structure of this type of hydrogen / oxygen generator is as shown in FIG. 6 when it is applied to a large-scale facility such as when a large amount of oxygen gas or hydrogen gas is required. So-called "double pole filter press type electrolyzer" has been proposed ("New Edition Electrochemical Handbook", (Company)
Published by Maruzen Co., Ltd., 2nd edition, 4th edition, 73rd edition
(See page 3).

This device includes a solid electrolyte membrane 210, for example,
A cation exchange membrane (a fluororesin sulfonic acid cation exchange membrane, for example, "Nafion 117" manufactured by DuPont);
It is composed of a mesh-shaped porous power feeders 211 and 212 made of a white metal group metal and the like attached to both surfaces thereof, and a bipolar electrode plate 213 arranged outside both porous power feeders 211 and 212. A plurality of solid electrolyte membrane units 220, 220 are composed of a water electrolysis cell in which each unit is arranged so as to be superposed. The bipolar electrode plate 213 is a single electrode plate in which the electric potentials of the front surface and the back surface of the electrode plate are opposite when energized.

That is, in this case, by electrolyzing while supplying water to the anode side, 2H ₂ O → O ₂ on the anode side.
A reaction such as + 4H ⁺ + 4e ⁻ occurs to generate oxygen gas, and a reaction of 4H ⁺ + 4e ⁻ → 2H ₂ occurs to generate hydrogen gas on the cathode side.

Pure water supply paths 215, 215 for supplying pure water to the porous power feeders 211, 211 on the anode side of the solid electrolyte membrane units 220, 220 are arranged, and the solid electrolyte membrane units 220, Oxygen gas extraction paths 216, 216 for extracting oxygen gas (including water) from the porous power feeders 211, 211 on the anode side of 220 are provided, and the solid electrolyte membrane units 220, 220 are provided.
This is a structure in which hydrogen gas extraction paths 217, 217 for extracting hydrogen gas (including water) from the cathode-side porous power feeders 212, 212 are arranged.

Specifically, as the structure of the water supply path of such a hydrogen / oxygen generator, a water supply path of a manifold type is provided in the longitudinal (axial) direction of the water electrolysis cell to form the anode side. In order to supply pure water to the anode, and to take out oxygen and water generated from the anode side, another manifold type take-out path provided in the longitudinal (axial) direction is provided, and further, another manifold type take-out path provided in the longitudinal (axial) direction is provided. A manifold type takeout path is provided so that water and hydrogen generated from the cathode side can be taken out. Further, in this case, an annular gasket is arranged on the outer periphery of the porous power feeder of the water electrolysis cell with the solid electrolyte membrane sandwiched therebetween to ensure a seal between the inside of the water electrolysis cell and the atmosphere side.

By the way, in such a conventional hydrogen / oxygen generator, when the pressure in the water electrolysis cell is considerably higher than the atmospheric pressure side, the gas pressure difference impairs the sealing function and causes the side closer to the atmosphere than the gasket. Oxygen, hydrogen, water, etc. could leak into the water, which was not preferable. Further, when the differential pressure between the anode side and the cathode side is large, there is a problem that the solid electrolyte membrane may be damaged and the original function of the device may not be fulfilled.

In order to solve such a problem, the present inventors have already proposed in Japanese Patent Application No. 7-59331, a solid polymer electrolyte membrane 110, and a solid polymer electrolyte membrane 110 provided on both sides thereof, as shown in FIG. And the porous electrodes 111 and 112, and a bipolar electrode plate 113 arranged on both outer sides of both porous anodes and serving as an anode and a cathode.
A plurality of solid polymer electrolyte membrane units composed of
The bipolar water electrolysis cell 102 having a structure in which 120 and 120 are laminated is disposed in the cylindrical container 190, and is disposed between the solid polymer electrolyte membrane 110 and the electrode plate 113 and the solid polymer electrolyte. Disclosed is a hydrogen / oxygen generator, which comprises a gasket 170 for sandwiching the membrane 110 made of a flexible member, and has a seal structure in which the gasket outer peripheral portion is in close contact with the inner surface of the container. Even if the pressure in the water electrolysis cell is considerably higher than atmospheric pressure, for example, 0.98 MPa, it is possible to operate at a high pressure that does not leak oxygen, hydrogen, water, etc. to the atmosphere side from the gasket without impairing the sealing function. Provided hydrogen / oxygen generator.

[0009]

By the way, in such a conventional hydrogen / oxygen generator, the outer periphery of the water electrolysis cell 102 and the inner surface of the cylindrical container 190 are brought into close contact with each other without impairing the sealing function, Since oxygen, hydrogen, water, etc. are prevented from leaking to the atmosphere side from the gasket, high machining accuracy is required for both the outer periphery of the water electrolysis cell 102 and the inner surface of the cylindrical container 190, and in these assemblies, high accuracy is required. Assembly accuracy was required. Further, it is necessary to consider the amount of deformation due to heat or pressure load.

Further, when the cylindrical container 190 is made of a conductive material, the electrode plate 113 conducts and the function of the device cannot be achieved. Therefore, the water electrolysis cell 102 and the cylindrical container 190 are not provided. Therefore, when the cylindrical container 190 is made of an insulating material such as FRP, the cylindrical container 190 is unavoidably large in size in terms of mechanical strength and hinders compactness. Further, when a metal material such as stainless steel is used, the device tends to be complicated, for example, coating or bonding of an insulating material is required. .

In consideration of the above-mentioned circumstances, the present invention is designed so that even when the pressure in the water electrolysis cell is considerably higher than atmospheric pressure, for example, 0.98 MPa, the sealing function is not impaired and the atmosphere is better than the gasket. It is an object of the present invention to provide a compact hydrogen / oxygen generator that does not leak oxygen, hydrogen, water, etc. to the side and can be operated at high pressure.

[0012]

SUMMARY OF THE INVENTION The present invention has been made to achieve the problems and objects in the prior art as described above. The following (1) to (5) are summarized as follows. It is what

(1) From a solid electrolyte membrane, a porous power feeding body provided on both sides of the solid electrolyte membrane, and a bipolar electrode plate disposed outside of both porous power feeding bodies and serving as both an anode and a cathode. A bipolar water electrolysis cell having a structure in which a plurality of solid electrolyte membrane units that are configured is laminated, is arranged in a cylindrical container, and water electrolysis is performed in the gap between the cylindrical container and the water electrolysis cell. A cylindrical bag-shaped member having cells inserted therein is provided, and a flow medium is injected into the bag-shaped member and filled to expand the bag-shaped member, and the bag-shaped member is provided between the solid electrolyte membrane and the electrode plate. Further, the hydrogen / oxygen generating device is characterized in that the outer peripheral portion of the gasket sandwiching the solid electrolyte membrane is in close contact with the inner wall surface of the bag-shaped member to form a seal structure.

(2) The end plate disposed at the end of the water electrolysis cell and the cylindrical container are structured so that the fastening pressure of the water electrolysis cell can be adjusted by adjusting the fastening pressure with a screw member. The hydrogen / oxygen generator described in (1) above.

(3) The flow medium injected into the bag-shaped member is
The hydrogen / oxygen generator according to (1) or (2) above, which is a gas.

(4) The flow medium injected into the bag-shaped member is
The hydrogen / oxygen generator according to (1) or (2) above, which is a liquid.

(5) The flow medium injected into the bag-shaped member is
The hydrogen / oxygen generator according to (1) or (2) above, which is a mixture of gas and liquid.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION A bag-shaped member which is expandable by injecting a fluid medium into the inside is disposed in a cylindrical pressure vessel, and a water electrolysis cell is provided in a gap inside the bag-shaped member. The bag-shaped member suppresses the deformation of the annular gasket of the water electrolysis cell to the outer peripheral side, ensuring a seal between the inside of the water electrolysis cell and the atmosphere side, and sealing even under high pressure. Does not impair function.

Further, since the bag-shaped member has the bottom portion and the pressure is applied to the water electrolysis cell in the longitudinal direction, even if the tightening torque of the water electrolysis cell is reduced, the tightening torque is reduced. Can be suppressed.

Further, with the bag-shaped member in the inflated state and the apparatus assembled, by tightening the cell tightening bolts provided on the flange portion of the pressure container, the flange of the pressure container is not opened again. It is possible to adjust the tightening torque of the water electrolysis cell.

[0021]

Embodiments of the present invention will now be described in more detail with reference to the drawings.

FIG. 1 is an exploded perspective view of an embodiment of the hydrogen / oxygen generator of the present invention, and FIG. 2 is a partial vertical sectional view taken along the line AA of FIG. 3 is shown in a slightly separated state for the sake of convenience, FIG. 3 is a partial longitudinal sectional view showing the assembled state of the apparatus of FIG. 2, and FIG.
5 is an exploded perspective view showing a state in which the hydrogen / oxygen generator of the present invention is assembled.

1 to 3, reference numeral 1 generally indicates a hydrogen / oxygen generator according to the present invention. The hydrogen / oxygen generator 1 basically has a disk-shaped solid electrolyte membrane 10, annular porous power feeders 20 and 20 attached to both sides of the solid electrolyte membrane 10, and outside of both porous power feeders 20 and 20. From a water electrolysis cell 2 in which a plurality of disk-shaped solid electrolyte membrane units 40, 40, each of which is composed of a disk-shaped electrode plate 30 which performs both functions of a disk-shaped anode and a cathode, are arranged in parallel. It has a structure of. Each electrode plate 30 is a bipolar electrode plate, and is a single electrode plate in which the front surface and the back surface of the electrode plate have opposite potentials when energized.

Specifically, a disc-shaped end plate 60 made of SUS316 or the like at one end, a disc-shaped end plate 70 'made of resin such as PVC or PTFE (polytetrafluoroethylene), and titanium. End electrode plate 30 ', annular gasket 70 made of silicone rubber, fluororubber, etc., annular protective sheet 80 made of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) film, etc., solid electrolyte membrane 10, a protective sheet 80, an annular gasket 70, an intermediate electrode plate 30, ... An end electrode plate 30 'at the other end, an end insulating plate 70 ", and an end plate 60'.

In this case, the solid electrolyte membrane 10 and the electrode plate
The porous power feeding body 20 is housed in each sealed chamber composed of 30 and the gasket 70, and the ring-shaped attachment portion 20a formed on the outer peripheral portion of the porous power feeding body 20 includes the gasket 70 and the protective sheet. It is sandwiched and fixed at 80, which is the anode chamber.
(Oxygen generation chamber) A and cathode chamber (hydrogen generation chamber) B are formed.

Further, in this case, as shown in FIG. 1, one end electrode plate 30 'is provided with a single power supply rod 30'a made of titanium at the center thereof so as to project outward. , The insulating bush 61 fitted in the electrode hole portion 60a of the end plate 60 'through the electrode hole portion 70 "a formed in the end insulating plate 70".
A voltage is applied to the one end electrode plate 30 ′ through the a through a power source (not shown) provided separately. On the other hand, similarly to the other electrode plate 30 ', as shown in FIGS. 2 and 3, one power supply rod 30'e is provided at the central portion thereof so as to project outward, and the end insulating plate 70' is provided. Through the electrode hole portion 70'e formed in the end plate, and through the insulating bush 61e fitted in the electrode hole portion 60e of the end plate 60, and the electrode hole portion 90e provided in the pressure vessel. Then, a voltage is applied to the other end electrode plate 30 ′ from a separately provided power source (not shown).

Then, in each solid electrolyte membrane unit 40,
A pure water supply path 52, a hydrogen gas extraction path 54, an oxygen gas extraction path 56, and a drainage drain path 58, which communicate with each other in the longitudinal (axial) direction, are formed in a manifold type.

That is, the pure water supply path 52 is connected to the pure water supply nozzle 62 provided in the end plate 60 ', the hole 72 "of the end insulating plate 70" and the pure water of the end electrode plate 30'. Supply hole 32 ', gasket 70 hole 72, protective sheet 80 hole 8
2, pure water supply hole 12 of solid electrolyte membrane 10, protective sheet 80
Hole portion 82 of the gasket 70, the hole portion 72 of the gasket 70, the pure water supply hole portion 32 of the intermediate electrode plate 30, ... so as to terminate in the pure water supply hole portion 32 'of the other end electrode plate 30'. It is configured as a manifold type.

Similarly, the hydrogen gas extraction path 54 is connected to the hydrogen gas extraction nozzle 64 provided in the end plate 60 ', the hole 74 "of the end insulating plate 70" and the hydrogen gas of the end electrode plate 30'. Extraction hole 34 ', gasket 70 hole 74, protective sheet 80 hole 84, solid electrolyte membrane 10 hydrogen gas extraction hole
14, hole 84 of the protective sheet 80, hole 74 of the gasket 70, hydrogen gas extraction hole 34 of the intermediate electrode plate 30, .... Hydrogen gas extraction hole 34 of the other end electrode plate 30 ' It is configured in a manifold type so that it terminates in '.

Similarly, the oxygen gas extraction path 56 is
From the oxygen gas extraction nozzle 66 provided in the end plate 60 ′, the hole portion 76 ″ of the end insulating plate 70 ″, the oxygen gas extraction hole portion 36 ′ of the end electrode plate 30 ′, the hole portion 76 of the gasket 70. , Hole 86 of the protective sheet 80, oxygen gas extraction hole 16 of the solid electrolyte membrane 10, hole 86 of the protective sheet 80, hole of the gasket 70
76, the oxygen gas extraction hole 36 of the intermediate electrode plate 30, ... is constructed in a manifold type so as to terminate in the oxygen gas extraction hole 36 'of the other end electrode plate 30'.

Further, similarly, the drain path 58 for draining water is provided.
Is the water draining nozzle 68 provided on the end plate 60 '.
From the hole 78 "of the end insulating plate 70", the drainage hole 8'of the end electrode plate 30 ', the hole 78 of the gasket 70, the hole 88 of the protective sheet 80, the water of the solid electrolyte membrane 10 Hole 18 for removal, protective sheet 80
Hole portion 88 of the gasket 70, hole portion 78 of the gasket 70, drainage hole portion 38 of the intermediate electrode plate 30, ... Manifold so as to terminate in the drainage hole portion 38 'of the other end electrode plate 30' It is composed of expressions. In the case of the present embodiment, as shown in FIG. 4, one end plate 60 ′ side is provided with a pure water supply nozzle 62, a hydrogen gas extraction nozzle 64, an oxygen gas extraction nozzle 66, and a water removal nozzle. 68 are provided.

Further, as the solid electrolyte membrane 10, a solid polymer electrolyte formed in a membrane shape, for example, a cation exchange membrane (a fluororesin sulfonic acid cation exchange membrane, for example, "Nafion 117" manufactured by DuPont) is used. It is preferable to use a "solid polymer electrolyte membrane" having a structure in which a porous anode and cathode made of a noble metal, particularly a platinum group metal, are chemically bonded by electroless plating on both sides. In this case, it is preferable that both electrodes be platinum, and in particular,
When a two-layer structure of platinum and iridium is used, the current density is high, for example, 50 to 70 A / dm2 in the conventional solid electrolyte membrane having a structure in which the electrodes are physically in contact with the ion exchange membrane. On the other hand, it becomes possible to carry out electrolysis at 80 ° C and 200 A / dm2 for a long period of about 4 years. In this case, in addition to the above iridium, a solid electrolyte membrane having a multi-layer structure plated with two or more kinds of platinum group metals can be used, and higher current density can be achieved.

Further, the solid electrolyte membrane 10 of the present application has a structure in which electrodes made of a noble metal are chemically bonded to both surfaces of the solid polymer electrolyte by electroless plating, and therefore, the water between the solid polymer electrolyte and both electrodes is increased. Since there is no solution resistance and gas resistance, the contact resistance between the solid polymer electrolyte and both electrodes is low, the voltage is low, the current distribution is uniform, high current density, high temperature water electrolysis, high pressure water Electrolysis becomes possible, and highly pure oxygen and hydrogen gas can be efficiently obtained. In addition, in the case of the present embodiment, the solid electrolyte membrane 10 is used as the diaphragm in this way, but other solid electrolyte membranes such as a ceramic membrane can also be used.

On the other hand, it is preferable that the porous power feeding body 20 is made of a titanium mesh, for example, three layers of expanded metal and has a thickness of several mm in order to ensure air permeability. By using this porous power feeder, the electrode plate 30 to the platinum-plated portion of the surface of the solid electrolyte membrane 10, while supplying electricity necessary for electrolysis, pure water as a raw material and generated oxygen, hydrogen Gas can pass through. Further, the porous power feeding body 20, in short, may be any porous body having a conductive and air-permeable property, and in addition to the above, a carbon porous body, a metal porous body, a porous conductive ceramic, etc. are applied. It is possible.

The electrode plate 30 is made of titanium for the reason of corrosion resistance, and in this embodiment, the electrode plate 30 has a thickness of 5 mm to 6 mm.

Further, as shown in FIG. 3, stainless steel,
For example, disk-shaped end plates 60 and 60 'composed of SUS304, SUS316, etc. are provided, and one of the end plates 60' has a diameter that is an electrode plate 30 constituting the water electrolysis cell 2, a solid electrolyte. It is larger than the diameter of components such as the membrane 10.

Further, as shown in FIG. 5, a bag-shaped member 41 which is inflatable by injecting a fluid medium into the inside of the cylindrical shape is provided in the cylindrical pressure vessel 90. The flow medium injection section 42 connected to the pump is inserted into the flow medium injection member insertion hole 92 provided in the pressure vessel 90. The water electrolysis cell 2 is placed in the gap 44 inside the bag-shaped member.
Is inserted so that the end plate 60 ′ side is on the outside, and the bolts are fastened to the fastening bolt holes 93 provided in the flange portion 94 of the pressure vessel 90 and the fastening bolt holes 95 provided in the end plate 60 ′. It is designed to be fastened via 8A and nut 8B. In the figure, 95A and 95B indicate tightening nuts and bolts of the electrolytic cell 2.

In this case, when assembling the present apparatus, the water electrolysis cell 2 is fitted into the gap 44 inside the bag-shaped member 41 preset in the pressure vessel 90 and provided on the flange portion 94 of the pressure vessel 90. The fastening bolt hole 93 and the fastening bolt hole 95 provided in the end plate 60 ′ are fastened via the bolt 8A and the nut 8B. After that, a fluid medium is injected from the flow medium injection unit 42 connected to the pump of the bag-shaped member 41, and the bag-shaped member 41
Is designed to expand.

With this configuration, the bag-shaped member 41 suppresses the deformation of the annular gasket 70 toward the outer peripheral side, and the seal between the inside of the water electrolysis cell and the atmosphere side is secured, so that the high pressure However, it does not impair the sealing function.
Further, the bag-shaped member 41 has a bottom portion 43, and the water electrolysis cell 2
Since the pressure is applied in the longitudinal direction, even if the tightening torque of the tightening nut and the bolts 95A and 95B of the electrolytic cell 2 is decreased, the decrease of the tightening torque can be suppressed. Further, by tightening the fastening bolts 95A and 95B provided on the end plate 60 ′, the water electrolysis cell 2 can be formed without opening the flange 94 of the pressure vessel 90.
It is possible to adjust the tightening torque of.

Since the pressure vessel 90 and the water electrolysis cell 2 are insulated by using an insulating material such as nylon or polyester for the bag-like member 41, the material used for the pressure vessel 90 is not limited, and the pressure vessel 90 is not limited. It is no longer necessary to apply insulation processing such as glass lining to the inner surface of the. Further, as the fluid medium to be injected into the bag-shaped member 41, not only the pressure gas but also a mixture of gas and liquid or only liquid can be supplied. In particular, if a low-temperature fluid medium is circulated, electrical The water electrolysis cell 2 can be cooled during the decomposition.

[0041]

According to the hydrogen / oxygen generator of the present invention,
A solid electrolyte membrane and a porous power supply body provided on both sides thereof,
A bipolar water electrolysis cell having a structure in which a plurality of solid electrolyte membrane units each composed of an anode and a cathode electrode plate that perform both functions of a cathode and are disposed outside both porous power feeders are laminated. A cylindrical bag-shaped member in which the water electrolysis cell is fitted is disposed in the gap between the cylindrical container and the water electrolysis cell, and the flow medium is applied to the bag-shaped member. Inject the
Sealing structure in which the outer peripheral portion of the gasket, which is disposed between the solid electrolyte membrane and the electrode plate and sandwiches the solid electrolyte membrane, is in close contact with the inner wall surface of the bag-shaped member by filling and expanding the bag-shaped member Since it is made such that it is an extremely excellent invention which exhibits the remarkable and unique action and effect as shown below.

(1) The bag-shaped member suppresses deformation of the annular gasket to the outer peripheral side, so that a seal between the inside of the water electrolysis cell and the atmosphere side is secured, and the sealing function is not impaired even under high pressure.

(2) Further, since the bag-shaped member applies pressure to the water electrolysis cell in the longitudinal direction, even if the tightening torque of the water electrolysis cell is reduced, the reduction of the tightening torque is suppressed. can do.

(3) Even when the tightening torque of the water electrolysis cell is reduced when the bag-shaped member is inflated and the apparatus is assembled, by further tightening the bolts and nuts inserted through the bolt holes, It is possible to increase the clamping force of the water electrolysis cell.

(4) Since the pressure vessel and the water electrolysis cell are insulated by using an insulating material as the bag-shaped member,
There is no need to insulate the inner surface of the pressure vessel, the material used for the pressure vessel is not limited, and the pressure vessel has a simple structure, and the device can be made compact.

(5) As a fluid medium to be injected into the bag-shaped member,
It is possible to supply not only gas under pressure but also a mixture of gas and liquid or liquid, and in particular, by circulating a low temperature fluid medium, it becomes possible to cool the water electrolysis cell during electrolysis. .

(6) Therefore, according to the present device, it is possible to provide a hydrogen / oxygen generator which can be operated at a higher pressure than in the conventional case.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of a hydrogen / oxygen generator of the present invention.

FIG. 2 is a partial vertical cross-sectional view taken along the line AA in FIG. 1, showing a state in which a slight distance is provided between the constituent members for understanding.

FIG. 3 is a partial vertical cross-sectional view showing a state where the device of FIG. 2 is assembled.

FIG. 4 is an end view in the C direction of FIG.

FIG. 5 is an exploded perspective view showing a state in which the hydrogen / oxygen generator of the present invention is assembled.

FIG. 6 is a sectional view showing an outline of a conventional bipolar / filter press type hydrogen / oxygen generator.

FIG. 7 is a vertical cross-sectional view of a conventional hydrogen / oxygen generator.

[Explanation of symbols]

1 ... Hydrogen / oxygen generator 2 ... Water electrolysis cell 10 ... Solid electrolyte membrane 12, 32, 32 '... Pure water supply hole 14, 34, 34' ... Hydrogen gas extraction Holes 16, 36, 36 '・ ・ ・ Oxygen gas extraction holes 18, 38, 38' ・ ・ ・ Drainage holes 20 ・ ・ ・ Porous power feeder 20a ・ ・ ・ Attachment parts 30 ・ ・Electrode plate 30 '... End electrode plate 32a ... Pure water supply recess 32' ... Pure water supply hole 34a ... Hydrogen gas collection recess 34b ... Hydrogen gas outlet 36a ..Oxygen gas collection recess 36b ... Oxygen gas extraction port 38a ... Water removal collection recess 38b ... Water removal collection port 40 ... Solid electrolyte membrane unit 41 ... Bag-shaped member 42. ..Flow medium injection part 52 ... Pure water supply path 54 ... Hydrogen gas extraction path 56 ... Oxygen gas extraction path 58 ... Water drainage path 60 ... End plate 62 ... Pure Water supply nozzle 64: Hydrogen gas extraction nozzle Crow 66 ... Oxygen gas extraction nozzle 68 ... Water removal nozzle 70 ... Gasket 70 '... End gasket 72, 72', 74, 74 ', 76, 76', 78, 78 ' , 82, 84, 8
6, 88, ... Hole 80 ... Protective sheet 90 ... Pressure vessel 92 ... Flow medium injection member insertion hole 93, 95 ... Fastening bolt hole 94 ... Flange 102 ...・ Water electrolysis cell 110 ・ ・ ・ Solid polymer electrolyte membrane 111,112 ・ ・ ・ Porous power supply 113 ・ ・ ・ Electrode plate 120 ・ ・ ・ Solid polymer electrolyte membrane unit 170 ・ ・ ・ Gasket 190 ・ ・ ・ Container 210 ・ ・-Solid electrolyte membrane 211,212 ... Porous power supply body 213 ... Bipolar electrode plate 215 ... Pure water supply path 216 ... Oxygen gas extraction path 217 ... Hydrogen gas extraction path 220 ... Solid Electrolyte membrane unit A ・ ・ ・ Anode chamber B ・ ・ ・ Cathode chamber

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Hirai 475-20 Shinnobe, Beppu Town, Kakogawa City, Hyogo Prefecture (72) Inventor Hiroko Kobayashi 5-8-11 Nagura Town, Nagata-ku, Kobe City, Hyogo Prefecture (72) Invention Mamoru Nagao 2-7-18-102, Itakano, Higashiyodogawa-ku, Osaka-shi, Osaka (72) Inventor Hiroyuki Harada 2-25-43 Nishi-oizumi, Nerima-ku, Tokyo (56) Reference JP-A-55-119186 ( JP, A) JP 56-158885 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C25B 9/00 C25B 1/08 C25B 11/03

Claims (5)

(57) [Claims] 1. A solid electrolyte membrane, a porous power feeding body provided on both sides of the solid electrolyte membrane, and a bipolar electrode plate disposed on the outside of both porous power feeding bodies for performing both functions of an anode and a cathode. A bipolar water electrolysis cell having a structure in which a plurality of solid electrolyte membrane units are laminated is disposed in a cylindrical container, and the water electrolysis cell is provided in the gap between the cylindrical container and the water electrolysis cell. A bag-shaped member having a cylindrical shape in which is inserted, a flow medium is injected into the bag-shaped member, the bag-shaped member is inflated, and the bag-shaped member is disposed between the solid electrolyte membrane and the electrode plate. A hydrogen / oxygen generator characterized in that the outer peripheral portion of the gasket sandwiching the solid electrolyte membrane is in close contact with the inner wall surface of the bag-shaped member to form a seal structure. 2. The end plate and the cylindrical container arranged at the end of the water electrolysis cell are configured so that the fastening pressure of the water electrolysis cell can be adjusted by adjusting the fastening pressure with a screw member. The hydrogen / oxygen generator according to claim 1, wherein 3. The hydrogen / oxygen generator according to claim 1, wherein the flow medium injected into the bag-shaped member is a gas. 4. The hydrogen / oxygen generator according to claim 1, wherein the flow medium injected into the bag-shaped member is a liquid. 5. The hydrogen / oxygen generating device according to claim 1, wherein the flow medium injected into the bag-shaped member is a mixture of gas and liquid.