WO2007129727A1

WO2007129727A1 - Electrolyzed water generator and electrode set with membrane used in the electrolyzed water generator

Info

Publication number: WO2007129727A1
Application number: PCT/JP2007/059581
Authority: WO
Inventors: Mikihiko Hase; Saburo Okuda
Original assignee: Cocoroca Corporation
Priority date: 2006-05-09
Filing date: 2007-05-09
Publication date: 2007-11-15
Also published as: CN101437762A; JPWO2007129727A1; JP4246780B2

Abstract

There is provided an electrolyzed water generator capable of performing electrolysis in a stable manner for a long period of time. The electrode set (100) with a membrane in the electrolyzed water generator has membrane supporting plates (105a, 105b) by which an ion permeable membrane (103) is secured and two electrodes (102a, 102b) disposed on both sides of the membrane (103). The two electrodes (102a, 102b) are pressed and secured by a clip to a spacing portion disposed at the openings of the membrane supporting plates (105a, 105b). As a result, since the distance between the two electrodes (102a, 102b) is kept constant, even if electrolyzed water is repeatedly generated a hundred times, the degradation of the characteristics of the electrolyzed water is not recognized.

Description

Specification

Electrolyzed water generating device and electrode set with diaphragm used therefor

Technical field

[0001] The present invention relates to a batch-type electrolyzed water generating apparatus for supplying an aqueous solution containing an electrolyte to an electrolytic cell in which an anode and a cathode are arranged on both sides of an ion-permeable diaphragm and generating electrolyzed water by electrolysis. The present invention relates to a diaphragm electrode set.

Background art

An electrolyzed water generating apparatus is an apparatus that generates acidic electrolyzed water and alkaline electrolyzed water by electrolyzing an aqueous solution (electrolyzed water) in which a small amount of a chlorine-based electrolytic substance is dissolved in water. . In order to generate electrolyzed water using the electrolyzed water generating device, first, the electrolytic cell is divided into a positive electrode cell and a negative electrode cell by partitioning the cell with a diaphragm, an anode plate is disposed in the positive electrode cell, and a negative electrode is disposed in the negative electrode cell. Place the board. Then, after supplying an aqueous solution of a small amount of chlorinated electrolyte in the anode and cathode tanks, a direct current is passed between the anode and cathode. Then, the electrolyzed water is electrolyzed, so that acidic electrolyzed water containing effective chlorine can be obtained from the anode tank, and alkaline electrolyzed water containing sodium hydroxide can be obtained from the cathode tank (see, for example, Patent Document 1). . At this time, depending on the electrolysis conditions, obtain acidic electrolyzed water having a pH (hydrogen ion concentration) of 2.0 to 3.5, and alkaline electrolyzed water having a hydrogen ion concentration of 10.5 to 12.0. Can do. Effective chlorine refers to chlorine-based substances that have a bactericidal effect, and acidic electrolyzed water contains effective chlorine such as HCIO (hypochlorous acid) and ClO (hypochlorite ion). The

[0003] Here, as an electrolyzed water, an aqueous solution containing 0.2% or less of NaCl in water is used, and the generated acidic electrolyzed water has a pH of 2.2 to 2.7 and an effective chlorine concentration. When it contains 20-60mgZkg, the strong acid electrolyzed water produced is approved by the Ministry of Health, Labor and Welfare as a food additive.

[0004] By the way, among conventional electrolyzed water generators, there are known batch-type electrolyzed water generators that are compact and portable, and can easily generate electrolyzed water anywhere. For example, in Japanese Patent Application Laid-Open No. 2003-159591 (Patent Document 1), a diaphragm fixing plate for fixing an ion-permeable diaphragm is arranged in an electrolytic cell, and the electrolytic cell is divided into two cells by this diaphragm fixing plate. An electrolyzed water generating device is described in which electrodes (anode plate and cathode plate) are arranged in each tank. The

[0005] The diaphragm fixing plate for partitioning the electrolytic cell is manufactured by, for example, an injection molding method using a polyphenylene sulfide material. The reason is that polyphenylene sulfide is a material excellent in heat resistance and chemical resistance, and has high strength and rigidity, so that a diaphragm fixing plate excellent in dimensional stability can be manufactured by an injection molding method. In addition, using a material in which glass fiber is added to polyphenylene sulfide (glass fiber reinforced polysulfide sulfide), it is superior in strength, rigidity, and dimensional stability by the injection molding method. A diaphragm fixing plate is also manufactured.

[0006] Further, in the conventional electrolyzed water generator, when the electrolysis is continued while the polarity of the electrode plate is fixed as it is, the scale is composed of precipitates of basic compounds such as calcium carbonate and magnesium carbonate on the electrode plate on the cathode side. As a result, the electrolysis efficiency gradually decreases. For this reason, when the electrolysis efficiency is reduced, the electrode is washed by dissolving the scale attached to the electrode plate in the washing mode in which the polarity of the electrode plate is switched and then performing electrolysis, and the reduced electrolysis efficiency is obtained. It has recovered (for example, Patent Document 2).

Patent Document 1: JP 2003 159591 A

Patent Document 2: JP-A-11 314089

Disclosure of the invention

Problems to be solved by the invention

[0007] However, the use of a diaphragm fixing plate manufactured by an injection molding method using a glass fiber reinforced polyethylene sulfide material and the use of a cleaning mode have the following problems.

[0008] A problem of the injection molding method is that the injection molding is difficult and the molding cost is high. Diaphragm fixation plates manufactured using glass fiber reinforced polyphenylene sulfide materials have excellent properties (high strength, high rigidity, dimensional stability). The glass fiber is uniformly dispersed in the diaphragm fixing plate, and a force S is required to produce a dense injection-molded body. In order to satisfy this condition, advanced injection molding technology is required. Therefore, the number of manufacturers that manufacture diaphragm fixing plates by injection molding is limited. In addition, when a high-strength, high-rigidity glass fiber reinforced polyethylene sulfide material is used, wear deterioration of the mold and molding machine is accelerated. Therefore, the life of the mold is shortened and the molding machine Tenancy needs to be performed frequently, which increases the manufacturing cost of the diaphragm fixing plate. Therefore, when using a glass fiber reinforced polyphenylene sulfide material, the number of manufacturers is limited and the manufacturing price increases, making it impossible to outsource the manufacture of diaphragm fixing plates easily and inexpensively. In addition, a diaphragm fixing plate manufactured by an injection molding method using a glass fiber reinforced polyethylene sulfide material may lack long-term stability. This is because glass fibers are corroded by strongly acidic electrolyzed water, so if this diaphragm fixing plate is used for a long period of time, the glass fibers will gradually dissolve, and the diaphragm fixing plate may be cracked and damaged. The

[0009] On the other hand, the problem when recovering the reduced electrolysis efficiency using the cleaning mode is that the performance of the electrolyzed water obtained along with the adhesion of the scale gradually decreases, and the period during which the scale is dissolved in the cleaning mode is electrolyzed. For example, water cannot be generated. Therefore, it is desirable to reduce the decrease in electrolyzed water performance by reducing the adhesion of scale and to reduce the number of times the cleaning mode is used.

[0010] The present invention has been made starting from solving the above-described problems of the prior art, and its purpose is to prolong electrolyzed water having stable characteristics when repeatedly producing electrolyzed water. It is to provide an electrolyzed water generating device that can be obtained over a period of time and an electrode set with a diaphragm used therefor.

Means for solving the problem

[0011] An electrolyzed water generating device of the present invention for achieving the above object has the following configuration. In other words, an electrolyzed water generating device that electrolyzes an aqueous solution containing an electrolyte to produce acidic electrolyzed water and alkaline electrolyzed water, and an ion-permeable diaphragm that separates the electrolytic cell into an anode part and a cathode part A diaphragm holding plate for fixing the diaphragm, two electrodes disposed on both sides of the diaphragm, and the diaphragm and the electrodes disposed on both sides of the diaphragm holding plate. A distance maintaining means for maintaining the distance between the first surface and the diaphragm on the first surface, and the second surface on the opposite side of the first surface. And a clip for elastically pressing and fixing the two electrodes respectively disposed on both sides of the diaphragm against the gap holding means. [0012] Here, for example, the diaphragm holding plate includes a diaphragm holding frame that holds a peripheral portion of the diaphragm.

It is preferable to have an opening in which the interval holding means is disposed.

[0013] Here, for example, it is preferable that the interval holding means is a rib arranged in a lattice pattern in the opening.

[0014] Here, for example, a boss having a predetermined height is arranged at the lattice-shaped intersection of the rib, and the distance between the diaphragm and the electrode is the height from the rib to the boss. It is preferable to be decided by

[0015] Here, for example, it is preferable that the ratio of the area of the rib in contact with the electrode is set to be 15% or less of the area of the electrode.

Here, for example, it is preferable that the diaphragm holding plate and the gap holding means are integrally manufactured by molding using a corrosion-resistant polypropylene material.

Here, for example, the diaphragm holding plate has a clip fixing groove for fixing the clip, the clip has a clip base portion and a tapered clip tip portion, and the clip is the clip. It is preferable that the base is fixed to the gap holding means by fitting into the clip fixing groove.

[0018] Here, for example, there is an electrode set with a diaphragm that separates the electrolytic cell into an anode part and a cathode part by forming the diaphragm, the diaphragm holding plate, the two electrodes, and the clip. Preferably it is formed.

[0019] Here, for example, the electrode set with a diaphragm has a tapered shape, and the electrolytic cell has a first fixing portion having a tapered groove for fixing the electrode set with the tapered diaphragm, and the tip of the clip It is preferable to have a second fixing part having a tapered groove for fixing the part.

[0020] Here, for example, the portion of the electrode set with a diaphragm that comes into contact with the first fixing portion is a corrosion-resistant packing that is sealed so that the electrolytic water of the anode portion and the cathode portion is not mixed with each other. Les are arranged, les, preferably.

[0021] Here, for example, a plurality of the clips are preferably used.

Here, for example, the packing is preferably formed of a fluorine compound containing ternary fluororubber. In addition, the electrode set with a diaphragm used in the electrolyzed water generating apparatus of the present invention is an electrode with a diaphragm used in an electrolyzed water generating apparatus that electrolyzes a water solution containing an electrolyte to generate acidic electrolyzed water and alkaline electrolyzed water. The ion-permeable diaphragm that separates the electrolytic cell into an anode part and a cathode part, a diaphragm holding plate that fixes the diaphragm, and two sides of the diaphragm are arranged separately from each other. A distance holding means disposed on both sides of the diaphragm holding plate for holding the gap between the electrode and the electrode at a predetermined distance, wherein the diaphragm on the first surface A distance holding means that contacts the two electrodes on a second surface opposite to the first surface, and two distance electrodes arranged on both sides of the diaphragm, respectively. Press and fix each elastically The diaphragm, the diaphragm holding plate, the two electrodes, and the clip are integrated to form an electrode set with a diaphragm that separates the electrolytic cell into an anode part and a cathode part. It is characterized by being.

The invention's effect

[0024] According to the present invention, there is provided an electrolyzed water generating device capable of obtaining electrolyzed water having stable characteristics over a long period of time when producing electrolyzed water repeatedly, and an electrode set with a diaphragm used therefor. it can.

[0025] Other features and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings. In the accompanying drawings, the same or similar components are denoted by the same reference numerals.

Brief Description of Drawings

[0026] The accompanying drawings are included in the specification, constitute a part thereof, show an embodiment of the present invention, and are used to explain the principle of the present invention together with the description.

FIG. 1A is a perspective view illustrating the overall configuration of an electrode set with a diaphragm.

1B is a front view and a cross-sectional view of the electrode set with a diaphragm in FIG. 1A.

FIG. 1C is a partially enlarged view around the center of the cross-sectional view of FIG. 1B.

FIG. 2A is a diagram illustrating a process of attaching an O-ring to a second diaphragm holding plate.

FIG. 2B is a diagram illustrating a process of attaching the first diaphragm holding plate to the second diaphragm holding plate after attaching the diaphragm to the second diaphragm holding plate. Fig. 2C] is a diagram for explaining a state in which the first diaphragm holding plate and the second diaphragm holding plate are overlapped. Garden 2D] In a state in which the first diaphragm holding plate and the second diaphragm holding plate are overlapped, It is a figure explaining the state which installed the packing for electrolytic water leakage in the contact part.

FIG. 2E is a diagram for explaining a process of fixing the cathode plate and the anode plate with a tap after installing the cathode plate and the anode plate on both sides of the two diaphragm holding plates.

3] It is a diagram illustrating the configuration of the electrolytic cell before installing the electrode set with a diaphragm.

4] It is a diagram illustrating the configuration of an electrolytic cell in which an electrode set with a diaphragm is installed.

FIG. 5 is a diagram illustrating the overall configuration of the electrolyzed water generating device.

6] It is a diagram for explaining the positional relationship between the electrolytic cell and the pitcher inside the electrolyzed water generator. 7] A diagram for explaining the connection between the electrolytic cell and the drive unit and the operation in which the drive unit takes out the electrolyzed water generated in the electrolytic cell. The drive unit extends the multistage hollow pipe and opens the open / close valve and the pitcher of the electrolytic cell. It is a figure explaining the state (cathode part) which opened and closed the opening / closing part (anode part), and the state where the drive part shrunk the multistage hollow pipe and closed the opening / closing valve and the pitcher opening / closing part of the electrolytic cell.

8] A diagram illustrating the connection relationship between the drive unit and the pitcher and the operation of transferring the electrolyzed water generated in the electrolytic cell to each pitcher, where the drive unit extends the multistage hollow pipe and opens and closes the electrolytic cell open / close valve and pitcher. FIG. 6 is a diagram for explaining a state in which an opening / closing part is opened (cathode part) and a state in which a driving part shrinks a multistage hollow pipe to close an opening / closing valve and a pitcher opening / closing part of an electrolytic cell (anode part).

Explanation of symbols

10 Electrolyzed water generator

11-1 Pitcher (cathode water)

11-2 Pitcher (anodic water)

12 Top cover

13 scale

14 Fixed part

15 Electrolyzer Cathode part

Case

Clip fixing part

Electrolyzed water outlet

Electrolyzed water outlet opening / closing valve

Multistage hollow pipe (Pitcher-Opening / closing pipe for opening / closing section) Multistage hollow pipe (Pitcher-Opening / closing pipe for opening / closing section) Drive section

1st shaft

2nd shaft

3rd shaft

4th shaft

Electrode set with diaphragm

clip

a Anode plate

b Cathode plate

Diaphragm

Packing

a 1st diaphragm holding plate

b Second diaphragm holding plate

a Anode terminal

b Cathode terminal

-1, 109-2 lattice ribs

Check valve

Ball groove

-1, 112-2 boss 113 groove

114 1, 114-2 Electrode support base

115 ○ One ring

117 Teflon (registered trademark) precision sphere

118 Check valve cover

BEST MODE FOR CARRYING OUT THE INVENTION

[0028] The electrode set with a diaphragm of the present embodiment and the electrolyzed water generating apparatus using the same will be described. In the following explanation, as an example of an electrolyzed water generator, a 2 liter raw material aqueous solution (electrolyzed water in which a small amount of NaCl is dissolved in water) is electrolyzed in an electrolytic cell, and a strong acid electrolysis containing effective chlorine from the anode part. Water (anode water) will be described using a batch-type electrolyzed water generator that generates strong alkaline electrolyzed water (cathode water) from the cathode.

[0029] However, the present invention is not limited to this. For example, if the electrolysis is performed using the electrode set with a diaphragm of the electrolytic cell of the present invention, a continuous electrolyzed water generator may be used. In addition, the configuration shown below is an example, and the configuration and arrangement thereof can be changed in a timely manner as long as the technical idea of the present invention is satisfied.

[0030] [Features]

First, the characteristics of the electrode set with a diaphragm of this embodiment will be described. An example of an electrode set with a diaphragm is shown in Fig. 1A (perspective view), Fig. 1B (front view, cross-sectional view), and Fig. 1C (partially enlarged view).

[0031] The electrode set with a diaphragm of the present embodiment is installed in an electrolytic cell and separates the electrolytic cell into an anode part and a cathode part, and ion permeability that separates the electrolytic cell into an anode part and a cathode part. The two electrodes placed on both sides of the diaphragm are pressed against each other by a clip made of an elastic material, and the distance between the electrodes is kept constant. It is characterized by the fact that it is fixed while being maintained.

[0032] The diaphragm holding plate includes a diaphragm holding frame that holds a peripheral portion of the diaphragm and an opening that is a part other than the diaphragm holding frame, and the opening has a predetermined gap between the diaphragm and the electrode. An interval holding unit is provided for holding the gap. As shown in Fig. 1C, the gap holding part formed in the opening of the diaphragm holding plate is the intersection of the grid-like ribs (109-1, 109-2) and the grid-like ribs. In this structure, the clip 101 is elastically pressed against the diaphragm holding plate with the two electrodes (102a, 102b) sandwiched between the clips. Therefore, when the two electrodes are sandwiched and pressed against the diaphragm holding plate, each electrode comes into contact with the corresponding boss, and the lattice-shaped rib comes into contact with the corresponding diaphragm surface. As a result, since the two electrodes are fixed to each other via the gap holding portion of the diaphragm holding plate and the diaphragm, the distance between the two electrodes is kept constant.

[0033] The electrolyzed water generating apparatus using the diaphragm-equipped electrode set according to the present embodiment has the above-described configuration, so that the distance between the two electrodes is stably maintained constant during the electrolysis, Since the adhesion of scale that occurs when the distance is unstable can be suppressed, it is possible to always obtain electrolyzed water with stable performance even when electrolyzed water is repeatedly produced, and cleaning to recover electrolysis efficiency. The period (time interval) until the mode is performed can be increased. For example, even if the production of 2 liters of electrolyzed water is repeated 100 times without washing mode, the effective amount of chlorine in the obtained acidic electrolyzed water is always stable at 40 to 60 ppm, and performance degradation of the electrolyzed water is recognized. I couldn't.

[0034] Further, the diaphragm holding plate is integrally formed by an injection molding method using a polypropylene material that is superior in chemical resistance and moldability as compared with a glass fiber reinforced polyethylene sulfide material. Therefore, the molding process becomes easy, and damage to the mold and the molding machine can be reduced. In addition, the number of manufacturers can be increased. The elastic polypropylene material is slightly lower in strength and rigidity (soft) than the glass fiber reinforced polyethylene sulfide material, but the diaphragm electrode set of this embodiment uses clips. Deformation of the diaphragm holding plate by pressing one electrode elastically against the gap holding section to fix it at a fixed interval and a structure holding the diaphragm holding plate against the diaphragm holding plate via an elastic packing Reduce the amount.

[0035] [Electrode set with diaphragm: FIG. 1A, FIG. 1B, FIG. 1C]

Hereinafter, the electrode set with a diaphragm of the present embodiment will be described, and then the electrolyzed water generating apparatus using the electrode set with the diaphragm of the present embodiment will be described.

FIG. 1A and FIG. IB show an example of the entire configuration of the electrode set 100 with a diaphragm of the present embodiment. FIG. 1A is a perspective view illustrating the overall configuration of the electrode set 100 with a diaphragm, and FIG. 1B is a front view and a sectional view of the electrode set with a diaphragm of FIG. 1A. FIG. In the cross-sectional view of Fig. 1B, the diaphragm is omitted to make it easier to see (see Fig. 1C). The electrode set 100 with a diaphragm is installed in a fixing part 14 of an electrolytic cell 15 described later, and separates the electrolytic cell 15 into an anode part 16 and a cathode part 17, and an anode plate 102a having a clip 101 and an anode terminal 107a. The cathode plate 102b having the cathode terminal 107b, the diaphragm 103, the packing 104, the first diaphragm holding plate 105a, the second diaphragm holding plate 105b, and the like.

[0037] The first diaphragm holding plate 105a (see FIG. 2B) and the second diaphragm holding plate 105b (see FIG. 2A) have similar shapes, and the diaphragm holding frame 120—which holds the peripheral portion of the diaphragm 103— 1, 120-2 and the opening 121-1, 1, 121-2 and force. The first and second diaphragm holding plates 105a and 105b are integrally molded by an injection molding method using a polypropylene material having excellent chemical resistance and moldability, and the diaphragm 103 is sandwiched therebetween to combine the diaphragms. 10 3 is fixed. In the openings 121-1 and 121-2, gap holding parts 122-1 and 122-2 are arranged to hold the gap between the diaphragm 103 and each electrode at a predetermined gap.

FIG. 1C is a partially enlarged view of the vicinity of the center of the electrode set 100 with a diaphragm in the cross-sectional view of FIG. 1B. As shown in Fig. 1C, the interval holding parts 122-1 and 122-2 are bosses formed on the intersections of the lattice ribs 109-1, 10 9-2 and the lattice ribs (see Fig. 2B). 112— 1, 112-2 and power. When the two electrodes are sandwiched between the clip 101, the two electrodes 102a and 102b are pressed against the diaphragm holding plates 105a and 105b by the spring mechanism of the clip 101, and the electrodes 102a and 102b correspond to the corresponding bosses 112-1 and 112— 2 and the ribs 109-1 and 109-2 come into contact with the diaphragm 103. As a result, the two electrodes 102a and 102b are pressed and fixed by the clip 101 via the gap holding portions 122-1, 122-2 and the diaphragm 103, so that the distance between the two electrodes is kept constant. Be drunk.

In the example of FIG. 1C, the thickness of the diaphragm 103, the anode plate 102a, and the cathode plate 102b is 0.5 mm, and the distance between the electrodes is kept constant at 5.5 mm. The diaphragm 103 is arranged at the center of the electrode set 100 with the diaphragm, and is held in a flat shape by the 0-ring 115 (see FIG. 2A) arranged around the diaphragm 103 so that the electrolytic water does not leak from the gap. Has been.

[0040] Next, each part constituting the electrode set with diaphragm 100 described above will be described.

[0041] [diaphragm holding plate 2A, 2B] The first and second diaphragm holding plates 105a and 105b have similar shapes shown in FIGS. 2A and 2B, and the electrode set 100 with a diaphragm is formed by overlapping each other. The size of each diaphragm holding plate is, for example, about 100 mm in the vertical direction (depth direction of the electrode tank) and about 130 mm in the horizontal direction (width direction of the electrode tank) when electrolyzing a 2 liter raw material aqueous solution. Each diaphragm holding plate is integrally formed by injection molding using a polypropylene material having excellent chemical resistance and moldability.

[0042] As shown in FIG. 2A, the second diaphragm holding plate 105b includes a frame 120-1, a ring for holding the diaphragm 120, a groove 113 for holding the ring, and an electrode support 114 for supporting the electrode. 1. Strip-shaped grid-shaped rib 109-1 holding the diaphragm, boss 112-1, which is arranged on the side of the grid-shaped rib 109-1 that contacts the electrode at the intersection, supplied from above the cathode section It comprises a check valve 110 for supplying the raw material aqueous solution to the anode part and a spherical groove 111 for holding a Teflon (registered trademark) precision sphere 117. As shown in FIG. 2B, the first diaphragm holding plate 105a includes a frame 120-2 for holding the diaphragm, an electrode support 1142 for supporting the electrode, a strip-like lattice-like rib 109 2 for holding the diaphragm, and a lattice-like shape. The rib 109-2 includes a boss 112-2 arranged on the side in contact with the electrode, a check valve cover 118, and a Teflon (registered trademark) precision ball 117.

[0043] Intermittent holding rods 122-1 and 122-2 consist of lattice-like ribs 109-1, 109-2 and boss 112-1,

112-2, as shown in Figs. 2A and 2B, arranged in openings 121-1 and 121-2, holding diaphragm 103 on a flat surface, and two electrodes (anode plate and cathode plate) Keep the distance between 102a and 102b constant. However, if the ratio of the area of the part in contact with the electrodes (anode plate and cathode plate) 102a, 102b corresponding to the spacing holding parts 122-1, 122-2 is large, the effective area of the electrode that can actually be used decreases. The rate at which hydrogen and chlorine gas generated at each electrode stays on the grid-like ribs increases and the efficiency of electrolysis decreases. Therefore, in the present embodiment, the total area of the rib portion is set to be 15% or less of the total area of the electrode, so that electrolysis is highly efficient. As an example, the lattice-like ribs 109-1, 109-2 are arranged in the openings 121-1, 121-2 in the shape of a lattice as shown in the figure, and the width is about lmm and the height is high. Is about 1.5 mm, and the bosses 112-1 and 112-2 have a cylindrical shape, and the diameter and height are, for example, about 1 mm.

[0044] Check valve 110, ball groove 111, Teflon precision ball 117, and check valve cover 118 Is to supply the raw material supply water supplied from the cathode part to the anode part in a certain direction, and to prevent back flow of the supplied raw material supply water. In other words, the ball groove 11 1 of the check valve 110 holds the Teflon (registered trademark) precision ball 117, and the check valve cover 118 is disposed thereon to control the movement of the Teflon (registered trademark) precision ball 117. is doing. The electrode support tables 114-1 and 114-2 are tables for holding the cathode plate 102b and the anode plate 102a, respectively.

[0045] [0—Ring]

The 0-ring 115 has the shape shown in FIG. 2A and is made of corrosion-resistant ternary fluororubber. 〇_Ring 115 is installed in 0-ring groove 113, and the diaphragm 103 is hermetically held when the diaphragm electrode set 100 is formed by combining the first and second diaphragm holding plates 105a and 105b.

[0046] [diaphragm]

The diaphragm 103 is an ion-permeable thin film made of a nonwoven fabric. The size of the diaphragm 103 is, for example, 100 mm in length, 130 mm in width, and 0.5 mm in thickness when electrolyzing a 2-liter raw material aqueous solution.

[0047] [Anode plate and cathode plate]

The anode plate 102a and the cathode plate 102b are thin titanium plates having an anode terminal 107a and a cathode terminal 107b as shown in FIG. 1A. The electrode portions of the anode plate 102a and the cathode plate 102b are about 90 mm in length (electrolyzed water depth direction) and about 100 mm in width (electrolyzed water depth), for example, when electrolyzing 2 liters of raw material aqueous solution. The width is 0.5mm. In the example of this embodiment, the distance between the electrodes is 5.5 mm, and the distance between the electrodes and the diaphragm is 2.75 mm.

[0048] [Clip]

The clip 101 has a clip base 101a and a clip tip 101b as shown in FIG. 2E, and the width of the clip base 101a is preferably the same as or slightly shorter than the distance between the electrodes. The clip 101 is formed by an injection molding method using a polypropylene material which is an elastic material. Since the clip 101 has elasticity, the distance between the two electrodes is kept constant. In other words, the clip 101 can be fixed by pressing the two electrodes, which are respectively arranged on both sides of the diaphragm, against the distance holding part by the elasticity of the clip. . Further, the clip 101 is fitted into the clip fixing portion 19 shown in FIG. 3 to be described later, so that the two electrodes can be firmly pressed and fixed by the spacing holding portion. The number and shape of the clips 101 shown in FIG. 2E are merely examples, and the number and shape can be changed as appropriate depending on the size of the electrolytic cell 15.

[0049] [Manufacturing process of electrode set with diaphragm: FIGS. 2A to 2E]

Next, the process of manufacturing the electrode set with diaphragm 100 using each of the above-described components will be described with reference to FIGS.

First, as shown in FIG. 2A, the O-ring 115 is fitted into the 0-ring groove 113 of the second diaphragm holding plate 105b. Next, as shown in FIG. 2B, the diaphragm 103 is attached to the second diaphragm holding plate 105b as shown in the figure. Next, after placing the Teflon (registered trademark) precision sphere 117 in the spherical groove 111, the first diaphragm holding plate 105a is moved and overlapped with the second diaphragm holding plate 105b as shown in FIG. 2C. Assemble electrode set 100 with diaphragm. Next, as shown in FIG. 2D, an electrolytic water leakage packing 104 is installed in a portion in contact with the electrolytic cell in a state where the first diaphragm holding plate 105a and the second diaphragm holding plate 105b are combined. Next, as shown in FIG. 2E, the cathode plate 102b and the anode plate 102a are disposed on the electrode support bases 114-1, 114-2 on both sides of the first diaphragm holding plate 105a and the second diaphragm holding plate 105b. After that, the clip 101 is sandwiched between the two electrodes and is elastically pressed against the diaphragm holding plate. That is, the clip base 101a is fitted into the clip fixing grooves 120a and 120b, and the clip tip end 101b is elastically pressed and fixed to the cathode plate 102b and the anode plate 102a. As a result, the electrode set with diaphragm 100 shown in FIG. 1A can be manufactured.

[0051] [Electrolytic cell structure: Fig. 3 and 4]

Next, a method for disposing the electrode set with diaphragm 100 described above in the electrolytic cell 15 will be described with reference to FIGS.

FIG. 3 is a diagram for explaining the configuration of the electrolytic cell 15 before installing the electrode set 100 with a diaphragm, and FIG. 4 is a diagram for explaining the configuration of the electrolytic cell 15 with the electrode set 100 with a membrane installed. Is. In the following description, as an example of the size of the electrolytic cell 15, a case where the size of the electrolytic cell 15 is 2 liters, the anode part 16 is 1750 ml, and the cathode part is 250 ml will be described as an example. Here, an example of the size of the electrolytic cell 15 is about 140 mm in length, about 100 mm in height, and about 130 m in width. m (anode part), approximately 37 mm (anode part).

As shown in FIG. 3, a fixed portion 14 having a taper shape is disposed on the wall side of both ends of the electrolytic cell 15, and two clip fixed portions 19 are provided at the bottom of the central portion of the electrolytic cell 15. It is in place. The number of clip fixing portions 19 can be changed according to the number of clips. Therefore, the electrolytic cell 15 is divided into the anode portion 16 and the cathode portion 15 by fitting the electrode set 100 with a diaphragm into the fixed portion 14.

FIG. 4 shows a state in which the electrolytic cell 15 is partitioned into an anode part 16 and a cathode part 17 by an electrode set 100 with a diaphragm. The electrode set 100 with a diaphragm is fixed between two fixing portions 14 through a corrosion-resistant ternary fluororubber packing 104. At this time, the packing 104 contracts and tightly fixes the electrode set 100 with a diaphragm to the fixing portion 14, thereby preventing leakage of electrolyzed water from the gap. Further, as shown in FIG. 3, a clip fixing portion 19 is disposed in the electrolytic cell 15, and the clip fixing portion 19 that keeps the distance between the two electrodes constant is fixed so as not to move. As a result, the diaphragm electrode set 100 is fixed by the fixing portion 14 and the clip fixing portion 19 so as not to be displaced, so that the distance between the electrodes is almost constant even if an external force is applied to the diaphragm electrode set 100. Retained.

[0055] Electrolyzed water outlets 20 and 21 are arranged at the bottoms of the anode portion 16 and the cathode portion 17, respectively. The electrolyzed water outlets 20 and 21 are supplied with an aqueous raw material solution into the electrolytic cell 15, and when the electrolytic aqueous solution is electrolyzed in the electrolytic cell 15 to generate electrolyzed water, the electrolyzed water outlet open / close valves 22 and 23 7). In addition, when the generation of electrolyzed water is completed by electrolysis of the raw water solution supplied in the electrolyzer 15, the generated electrolyzed water is opened by the open / close valves 22 and 23 at the electrolyzed water outlet, and the pitcher for anodic water 11— 2 and cathodic water pitcher -11-1. A method of supplying the generated electrode water to the anodic water pitcher 11-2 and the cathodic water pitcher 11-1 will be described later.

[0056] The electrode set 100 with a diaphragm manufactured by the above-described method is fitted into the fixing portion 14 and the clip fixing portion 19 shown in Fig. 3 to complete the electrolytic cell 15 shown in Fig. 4. Next, a method for producing electrolyzed water using the electrode set with diaphragm 100 described above will be described.

[0057] [Electrolyzed water generator: Fig. 5 and Fig. 6] FIG. 5 is a diagram illustrating the overall configuration of the electrolyzed water generating apparatus 10, and FIG. 6 is a diagram illustrating the positional relationship between the electrolytic cell and the pitcher inside the electrolyzed water generating apparatus. As shown in FIG. 6, an electrolytic cell 15 is disposed below the upper lid 12 of the upper body of the electrolyzed water generator 10, and a pitcher for cathodic water and an anodic water is disposed below the electrolytic cell 15. Is arranged. The scale 13 indicates the amount of electrolyzed water in the electrolytic cell 15.

When electrolyzed water is generated by the electrolyzed water generating apparatus 10, first, the raw material aqueous solution is supplied to the negative electrode portion 17 of the electrolyzer 15 of FIG. Then, the raw material aqueous solution is supplied from the cathode portion 17 to the anode portion 16 via the check valve 110 (FIG. 2A).

[0059] Next, electrolyzed water with different pH and effective chlorine content according to various uses is generated in the electrolytic cell 15 by electrolysis. In order to obtain a desired pH and effective chlorine content in the electrolyzed water generator, for example, the electrolysis time may be changed. For example, when producing acidic electrolyzed water with a pH of 3.5, place 2 liters of raw material aqueous solution (including a small amount of sodium chloride) in the electrolyzer and electrolyze for 2 minutes. When producing more strongly acidic electrolyzed water with a pH of 2.5, electrolysis may be performed for 10 minutes.

[0060] Immediately after the electrolysis, in order to prevent mixing of the generated anode water and cathode water, the drive unit

(AC solenoid) is activated to open and close the electrolyzed water outlet valves 22 and 23 at the electrolyzed water outlets 20 and 21, and the open / close pipes 24 and 25 extend to the pitcher opening and closing part. Open each pitcher opening and closing part of 1 and 11-2. Then, each generated electrolyzed water is transferred to and held by each pitcher with good sealing properties. Details of this will be described later with reference to FIGS.

[0061] [Supply of electrolyzed water from the electrolytic cell to the pitcher: FIGS. 7 and 8]

Next, a process for supplying the electrode water (anode water and cathode water) generated in the electrolytic cell 15 to the anode water pitcher 11 _ 2 and the cathode water pitcher 11 _ 1 will be described with reference to FIGS. The

FIG. 7 is a diagram for explaining the connection relationship between the electrolytic cell 15 and the drive unit 26 and the operation in which the drive unit 26 takes out electrolyzed water (positive water and cathode water) generated in the electrolytic cell 15. In FIG. 7, the electrode set with diaphragm 100 is omitted for ease of explanation.

The cathode part (left side) of FIG. 7 shows a state in which the driving part 26 contracts the multistage hollow pipe, moves the on-off valve 23 downward in the electrolytic cell 15, and the electrolytic water outlet 21 is closed. In this state Since the multi-stage hollow pipe (opening / closing pipe of the pitcher opening / closing section) 25 is held above the pitcher 11-1, the pitcher opening / closing section 2 (see the anode section in FIG. 8) is closed. Therefore, the aqueous raw material solution is injected into the electrolytic cell 15 with the multistage hollow pipes 24 and 25 being contracted. Subsequently, electrolysis is performed in the electrolytic cell 15, and electrolyzed water is generated in the anode part 16 and the cathode part 17. On the other hand, the anode part 16 (right side) in FIG. 7 shows a state in which the driving part 26 extends a multistage hollow pipe, moves the on-off valve 22 upward in the electrolytic cell 15, and opens the electrolytic water outlet 20. Yes. In this state, the multistage hollow pipe (opening / closing pipe of the pitcher opening / closing part) 24 arranged above the pitcher 11 _ 2 is moved downward to open the pitcher opening / closing part 2 (see the cathode part in FIG. 8). To. In this state where the drive unit extends the multistage hollow pipe, the anodic water generated in the electrolytic cell 15 is supplied from the electrolytic water outlet 20 to the pitcher 11-2 via the pitcher opening / closing unit 2.

[0064] [Connection between drive unit and pitcher: Fig. 8]

FIG. 8 is a diagram for explaining the connection relationship between the drive unit 26 and the pitchers 11-1 and 11-2 and the operation of transferring the electrolyzed water generated in the electrolytic cell 15 to each pitcher.

The anode part (right side) in FIG. 8 shows a state in which the drive part 26 has shrunk the multistage hollow pipe, moved the on-off valve 22 downward in the electrolytic cell 15, and closed the electrolytic water outlet 20. In this state, the multistage hollow pipe (opening / closing pipe of the pitcher opening / closing section) 24 is held above the pitcher 1, so that the pitcher opening / closing section 2 is closed. Thus, after the drive unit shrinks the multi-stage hollow pipe to close the electrolyzed water outlet 20 (the electrolytic water outlet 20 is also closed), the aqueous raw material solution is injected into the electrolytic cell 15. . Subsequently, electrolysis is performed in the electrolytic cell 15, and each electrolyzed water is generated in the anode part and the cathode part. On the other hand, in the cathode part 17 (left side) in FIG. 8, the drive part 26 extends the multistage hollow pipe after the electrolyzed water is generated, moves the on-off valve 23 upwardly in the electrolyzer 15 and opens the electrolyzed water outlet 21. Is shown. In this state, the opening / closing pipe (multi-stage hollow pipe) 25 of the pitcher opening / closing section disposed above the pitcher 11-2 moves downward to open the pitcher opening / closing section 2. As a result, the electrolyzed water (cathode water) generated in the electrolyzer 15 is supplied to the pitcher 11-1 from the opened electrolyzed water outlet 21 via the pitcher opening / closing part 2. Note that the electrolyzed water (anodic water) generated in the electrolyzer 15 is also supplied to the pitcher 11-2 by the same method. Next, the drive unit 26 described with reference to FIGS. 7 and 8 will be described in detail. As shown in Fig. 8, the drive unit 26 has two systems (multi-stage hollow pipes 24, 25) having the same structure for controlling cathodic water and anodic water. A hollow pipe 25) will be explained as an example. The drive unit 26 includes a drive unit 26, a multistage hollow pipe 25, a first shaft 27, a second shaft 28, a third shaft 29, and a fourth shaft 30. The multi-stage hollow pipe 25 has a first end 25a and a second end 25b opposite to the first end 25a. The first end 25a is connected to the on-off valve 23, and the drive unit is connected to the first end 25a and the second end 25b. The length between the two end portions 25b can be changed. The first end 25a of the multi-stage hollow pipe is connected to the third shaft 29, and the second end 25b of the multi-stage hollow pipe (the open / close pipe of the pitcher opening / closing section) is connected to the fourth shaft 30 and the third shaft. 29 is connected to the second shaft 28, the second shaft 28 is connected to the first shaft 27, and the first shaft 27 is connected to the drive unit 26. The drive unit 26 can change the length of the multistage hollow pipe 25 by changing the distance between the third shaft 29 and the fourth shaft 30. The open / close valve 23 for the electrolytic water outlet and the open / close pipe 25 for the pitcher opening / closing section are arranged on the same straight line.

[0067] For this reason, when the drive unit 26 force S is driven so that the third shaft 29 and the fourth shaft 30 are in contact with each other as shown on the left side of FIG. The opening / closing valve 23 moves downward, and at the same time, the opening / closing pipe 25 of the pitcher opening / closing section moves upward, so that the electrolytic water outlet 21 and the pitcher opening / closing section 2 are closed. On the other hand, when the drive unit 26 drives the third shaft 29 and the fourth shaft 30 away from each other (extends the multistage hollow pipe) as shown on the right side of FIG. 7, the open / close valve 22 of the electrolyzed water outlet is directed upward. At the same time, since the opening / closing pipe 24 of the pitcher opening / closing section moves downward, the electrolytic water outlet 20 and the pitcher opening / closing section 2 are opened.

Next, the operation in which the drive unit 26 supplies the electrolyzed water generated in the electrolytic cell 15 to the pitcher will be described with reference to FIG. 8. Before that, the drive unit 26 uses the anode unit in FIG. The operation performed before pouring the raw material aqueous solution into the electrolytic cell will be described. The drive unit 26 drives (shrinks the multistage hollow pipe) until the third shaft 29 and the fourth shaft 30 contact each other. As a result of this operation, the open / close valve 22 of the electrolytic water outlet and the open / close pipe 24 of the pitcher opening / closing section are closest to each other, and the open / close valve 22 of the electrolytic water outlet moves downward in the electrolytic cell 15 to move the electrolytic water outlet 20 Close and open The closed pipe 24 moves upward in the pitcher opening / closing part 2 and closes the opening 3.

Next, the operation performed when the drive unit 26 supplies the electrolyzed water generated at the cathode part of the electrolytic cell 15 to the pitcher 11-1 using the cathode part of FIG. The drive unit 26 moves the third shaft 29 and the fourth shaft 30 until they are farthest from each other (extends the multistage hollow pipe). Due to this operation, the open / close valve 23 for the electrolytic water outlet and the open / close pipe 25 of the pitcher opening / closing part are farthest from each other, and the open / close valve 23 for the electrolytic water outlet moves upward in the electrolytic cell 15 to move the electrolytic water outlet 21 The opening / closing pipe 25 of the pitcher opening / closing part moves downward, contacts the connecting part 2b of the pitcher opening / closing part 2, and opens the opening 3. Therefore, each drive unit connected to the cathode part and the anode part performs an operation of shrinking the multistage hollow pipe before supplying the raw material aqueous solution to the electrolytic cell 15, and the cathode water and the anode water generated in the cathode part and the anode part are reduced. By performing the operation of extending the multistage hollow pipe before supplying to each pitcher, the electrolyzed water can be generated by the electrolyzed water generating device, and the generated electrolyzed water can be stored by the pitcher.

[0070] [Performance of electrode set with diaphragm]

Finally, the performance of the electrolyzed water generating apparatus 10 using the above-described electrode set with a diaphragm 100 will be described.

[0071] The performance of the electrolyzed water generator 10 was evaluated from the characteristics of electrolyzed water obtained when electrolysis was repeated. Specifically, 2 liters of raw material aqueous solution was placed in the electrolytic cell, and electrolysis was performed for 10 minutes to generate electrolyzed water. Then, the effective chlorine content of the obtained anodic electrolyzed water was examined. Under this condition, when the electrolyzed water generating apparatus 10 operates normally, the pH of the acidic electrolyzed water is 2.4 to 2.6 and the effective chlorine content is 40 to 60 ppm. Therefore, when the above pH and effective chlorine content are set to the target values and the above target values are not reached, for example, when pH = 2.7 or more and effective chlorine content = less than 40 ppm, this electrolyzed water is generated. It was judged that the performance of the apparatus 10 was deteriorated, and it was examined whether or not the electrolyzed water could be repeatedly produced before the decrease.

As a result, it was found that electrolyzed water that achieves the target value can be obtained even when electrolyzed water is generated 100 times continuously under the above conditions. In addition, no adhesion of scale was observed on the electrode. From the above results, the electrolyzed water generating device having the above-described electrode set structure with a diaphragm can stably produce electrolyzed water having desired characteristics even when electrolyzed water is repeatedly generated. Power of s. When it is determined that the performance of the electrolyzed water in the electrolyzed water generating apparatus 10 is deteriorated, the performance of the electrolyzed water can be recovered by removing the scale attached to the electrodes in the cleaning mode. Here, the cleaning mode means that when the electrolysis efficiency is reduced, the polarity of the electrode plate is switched and then the electrolysis is performed to dissolve the scale attached to the electrode plate to clean the electrode and to reduce the electrolysis. A process that restores efficiency.

It should be noted that the configuration used in the above description is an example, and the configuration and arrangement can be changed as appropriate as long as the technical idea of the present invention is satisfied. For example, a check valve may be used instead of the on-off valve. Also, the shape of the adsorbent can be changed at any time.

[0074] The present invention is not limited to the above-described embodiment, and various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, in order to make the scope of the present invention public, the following claims are attached.

Claims

The scope of the claims

[1] An electrolyzed water generating device that electrolyzes an aqueous solution containing an electrolyte to generate acidic electrolyzed water and alkaline electrolyzed water,

An ion-permeable diaphragm that separates the electrolytic cell into an anode part and a cathode part;

A diaphragm holding plate for fixing the diaphragm;

Two electrodes respectively spaced apart on both sides of the diaphragm;

A distance holding means disposed on both sides of the diaphragm holding plate for holding a gap between the diaphragm and the electrode at a predetermined distance, wherein the first surface is in contact with the diaphragm and is in contact with the diaphragm. The distance holding means that contacts the two electrodes on the second surface opposite to the first surface, and the two electrodes that are spaced apart on both sides of the diaphragm are pressed against the distance holding means by elasticity, respectively, and fixed. And a clip to

The electrolyzed water generating apparatus characterized by having.

[2] The diaphragm holding plate according to claim 1, wherein the diaphragm holding plate includes a diaphragm holding frame that holds a peripheral portion of the diaphragm, and an opening in which the gap holding means is disposed. Electrolyzed water generator.

[3] The electrolyzed water generating device according to [2], wherein the gap holding means is a rib arranged in a lattice pattern in the opening.

[4] A boss having a predetermined height is disposed at the lattice-shaped intersection of the ribs, and the distance between the diaphragm and the electrode is determined by the height from the rib to the boss. The electrolyzed water generating apparatus according to claim 3.

[5] The electrolyzed water generating device according to [4], wherein the ratio of the area of the rib contacting the electrode is set to be 15% or less of the area of the electrode.

6. The electrolyzed water generating device according to claim 1, wherein the diaphragm holding plate and the gap holding means are integrally manufactured by forming using a corrosion-resistant polypropylene material.

[7] The diaphragm holding plate has a clip fixing groove for fixing the clip, the clip has a clip base portion and a taper-shaped clip tip portion, and the clip connects the clip base portion to the clip base portion. It is fixed to the gap holding means by being inserted into the clip fixing groove. The electrolyzed water generating device according to claim 1, wherein:

[8] The diaphragm, the diaphragm holding plate, the two electrodes, and the clip are integrally assembled to form an electrode set with a diaphragm that separates the electrolytic cell into an anode part and a cathode part. The electrolyzed water generating device according to claim 1, wherein:

[9] The electrode set with a diaphragm has a taper shape, and the electrolytic cell has a first fixing portion having a taper-shaped groove for fixing the electrode set with a diaphragm, and a taper shape for fixing the tip of the clip. The electrolyzed water generating device according to claim 8, further comprising a second fixing portion having a groove.

[10] A corrosion-resistant packing that seals the anode portion and the negative electrode portion so that the electrolytic water of the anode portion and the negative portion do not mix with each other is disposed at a portion that contacts the first fixed portion of the electrode set with a diaphragm. 10. The electrolyzed water generating device according to claim 9, wherein

[11] The electrolyzed water generating device according to [1], wherein a plurality of the clips are used.

12. The electrolyzed water generating device according to claim 10, wherein the packing is made of a fluorine compound containing ternary fluororubber.

[13] An electrode set with a diaphragm used in an electrolyzed water generating device for electrolyzing an aqueous solution containing an electrolyte to generate acidic electrolyzed water and alkaline electrolyzed water,

A diaphragm holding plate for fixing the diaphragm;

Two electrodes respectively spaced apart on both sides of the diaphragm;

Have

The diaphragm, the diaphragm holding plate, the two electrodes, and the clip are integrally assembled. An electrode set with a diaphragm for use in an electrolyzed water generating apparatus, wherein the electrode set with a diaphragm for standing and separating an electrolytic cell into an anode part and a cathode part is formed.