JP3595087B2 - Electrolyzed water generator - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides an electrolytic cell for continuously producing alkaline water and acidic water electrolytically, and a water quality for electrochemically measuring water quality such as tap water or purified water, or alkaline or acidic electrolytic water generated in the electrolytic cell. The present invention relates to an electrolyzed water generation device formed by providing a measurement device.
[0002]
[Prior art]
As an electrolyzed water generation device provided with the electrolysis tank 2 and the electrochemical water quality measurement device 20, a device having a structure shown in FIG. 3 is conventionally known. The electrolytic water generating apparatus shown in FIG. 3 is a so-called alkali ion water purifier composed of an electrolytic cell 2, a water purification apparatus 3, an electrolyte supply apparatus 4, and the like. The inside of the tank is divided into a chamber 7 and an electrode chamber 9 in which the electrodes 8 are arranged.
[0003]
Raw water in which tap water is generally used is first purified through the water purification device 3. The water purification device 3 removes organic substances, inorganic substances, or odor components such as hypochlorous acid contained in the raw water, and is usually composed of a microfilter such as an antibacterial activated carbon filter and a hollow fiber membrane. Next, the purified water flowing out of the water purification device 3 is divided into an inflow path 11 that is directly connected to the electrode chamber 9 and an inflow path 10 that is connected to the electrode chamber 7 and flows into the electrolytic cell 2. As described above, the electrolyte flowing from the electrolyte supply device 4 connected upstream of the electrode chambers 7 and 9 is continuously supplied to the water flowing into the electrolytic cell 2. As the electrolyte, a calcium salt such as calcium lactate or calcium glycerophosphate is used.
[0004]
As described above, while continuously flowing water in the electrolytic cell 2, an electrolytic voltage of an anode is applied to the electrode 6, and an electrolytic voltage of a cathode is applied to the electrode 8 to perform electrolysis. Acid water (so-called acidic ion water) is generated in the electrode chamber 7 (so-called alkaline ion water). The alkaline water thus generated is discharged from the outflow path 12 and the acidic water is discharged from the outflow path 13 through separate flow paths.
[0005]
The quality of the alkaline or acidic electrolyzed water obtained by electrolysis in the electrolytic cell 2 as described above is measured by the electrochemical water quality measuring device 20 located on the downstream side of the electrolytic cell 2. . In the system shown in FIG. 8, a water quality measuring device 20 is provided in the outflow path 12 of the alkaline water and the outflow path 13 of the acidic water to measure the quality of each electrolyzed water. This water quality measurement device 20 utilizing the principle of electrochemical measurement can perform water quality measurement by directly contacting the test solution passing through the working electrode, and is most suitable for water quality measurement in an electrolyzed water generation device. Measurement of pH, oxidation-reduction potential, and various ion concentrations using such an electrochemical water quality measuring device 20 has been conventionally performed. For example, the electrolyzed water generating apparatus described in Japanese Utility Model Laid-Open Publication No. 56-172391 is provided with a pH sensor as an electrochemical water quality measuring device, and displays the pH value of the generated electrolyzed water. Further, in the electrolyzed water generating apparatus described in Japanese Patent Application Laid-Open No. 5-64785, a pH sensor is provided as an electrochemical water quality measuring apparatus, and based on an output signal of the pH sensor, a deviation pH from a target set pH value is determined. Feedback control for increasing and decreasing the corresponding electrolysis voltage and flow rate is performed.
[0006]
The water quality measuring device 20 using the principle of electrochemical measurement is formed by including an electrode composed of a working electrode (detection electrode) 28 and a comparison electrode 21. The water quality is measured by detecting a potential difference or a current change between the two, and a schematic structure of the electrochemical water quality measuring device 20 is shown in FIGS.
[0007]
FIG. 4 shows a pH sensor, and FIG. 5 shows an oxidation-reduction potential sensor, in which a sealed portion 18 for sealing an internal solution 16 such as a saturated or 3.3 M (mol / L) potassium chloride solution or the like and an electrolytic water flow. A liquid junction holding member 24 is provided between the water detecting portion 17 to be watered, and a liquid junction (salt bridge) 22 formed of a porous material such as alumina ceramics is provided on the liquid junction holding member 24. It is kept. Incidentally, a cellulose-based thickener such as carboxymethylcellulose or hydroxyethylcellulose may be added to the internal solution 16 in order to stably elute potassium chloride and prevent crystallization. A silver / silver chloride electrode is usually used as the electrode of the comparison electrode unit 21, and the comparison electrode unit 21 is immersed in the internal solution 16. 4 and 5, reference numeral 14 denotes an amplifier for amplifying the detected potential difference, 15 denotes an internal solution replenishing port, 30 denotes an inlet, and 31 denotes an outlet. Electrolyzed water as a sample is supplied to the inlet. The water enters the water detecting unit 17 from 30 and flows through the water detecting unit 17 so as to flow out from the outlet 31.
[0008]
The working electrode 28 for detection is formed by enclosing the internal electrode 26a in the glass sensitive film 27 in the pH sensor of FIG. 4, and is formed of platinum or gold in the oxidation-reduction potential sensor of FIG. Using the reactive metal electrode 26b, this electrode 26b is formed by connecting the lead wire 44 to the tip of an insulating coating portion 29 such as a heat-shrinkable Teflon tube or glass coated with a lead wire 44 such as a platinum wire. It is. The working electrode portion 28 has a lower portion facing the inside of the water detecting portion 17 through the liquid junction holding member 24.
[0009]
FIG. 6 shows a structure in which a pH sensor and an oxidation-reduction potential sensor are integrated, and a reference electrode 21 is commonly used for the pH sensor and the oxidation-reduction potential sensor, and both the pH and the oxidation-reduction potential are measured. It is of a type that can be used.
Here, the electrolyzed water generation device as described above is often used in a humid place such as near a kitchen sink, and may also be used in a high-temperature and high-humidity atmosphere near a gas range. The electrochemical water quality measuring device 20 incorporated in the electrolyzed water generator is easily affected by moisture. In particular, the amplifier section 14 that amplifies the potential difference detected between the working electrode section 28 and the comparison electrode section 21 needs a measure against insulation failure against moisture.
[0010]
Accordingly, the printed circuit board 45 on which various mounted components such as chip components are mounted is covered with an insulating layer 48 made of a potting agent to form the amplifier section 14, and the insulating property of the amplifier section 14 is ensured by the insulating layer 48 of the potting agent. It is. As the potting agent constituting the insulating layer 48, a material having a high insulating performance with an insulating resistance of 1 × 10 ¹⁵ Ω or more is used.
[0011]
[Problems to be solved by the invention]
However, potting agents having high insulation resistance generally have high hardness. Therefore, when the insulating layer 48 is repeatedly used in a heat cycle environment in which the temperature is repeatedly increased and decreased, and the insulating layer 48 is repeatedly expanded and contracted by the potting agent, the insulating layer 48 having high hardness expands and contracts, and the mounting components on the surface of the printed circuit board 45 are hardened. May be repeatedly applied with stress, eventually causing solder cracking and peeling of the mounted component from the printed circuit board 45, and the measurement by the electrochemical water quality measuring device 20 may become impossible.
[0012]
Also, the lead wire 37 of the working electrode section 28 and the comparison electrode section 21 is connected to the amplifier section 14 via the relay printed circuit board 49. However, even if the amplifier section 14 is covered with an insulating layer 48 made of a potting agent, Moisture may permeate from the interface between the lead wire 37 and the insulating layer 48 due to the potting agent, and the potential of the working electrode 28 may interfere due to insulation failure due to the permeation of moisture, and accurate measurement may not be possible. This problem is likely to occur particularly in a case where a plurality of working electrodes 28 are provided as shown in FIG.
[0013]
The present invention has been made in view of the above points, and provides an electrolyzed water generating apparatus capable of preventing solder cracks of a mounted component of a printed circuit board of an amplifier section, and has an insulation failure due to moisture penetration of the amplifier section. It is an object of the present invention to provide an electrolyzed water generating apparatus capable of preventing the occurrence of water.
[0014]
[Means for Solving the Problems]
The electrolyzed water generating apparatus according to the present invention generates an alkaline water and an acidic water by electrolyzing water, and distributes the generated alkaline and acidic electrolyzed water to a downstream side of the electrolytic bath. And a water quality measuring device configured to electrochemically measure the quality of the electrolyzed water generated in the electrolyzer. Working electrode part, sealing part for sealing the internal solution, reference electrode part arranged in the sealing part, porous liquid junction part between water sampling part and sealing part, between working electrode part and comparison electrode part A water quality measurement device is formed with an amplifier section that amplifies and outputs the voltage of the substrate, and a height at which the surface of the printed circuit board covers a component mounted with a potting agent having an insulation resistance of 1 × 10 ¹² Ω or more and a hardness of 60 degrees or less. insulation resistance 1 × 10 ¹⁵ or more Ω provided with a buffer layer Providing an insulating layer of potting material is characterized in that by forming a amplifier unit.
[0015]
Further, according to the invention of claim 2, the amplifier section, the lead wire of the working electrode section connected to the amplifier section, the lead wire of the comparison electrode section and the like are covered with a filling layer made of a potting agent having an insulation resistance of 1 × 10 ¹⁵ Ω or more. It is characterized in that each member is integrated with a filling layer.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
FIG. 2 shows an example of an electrolyzed water generating apparatus, in which an electrolytic cell 2, a water purification device 3, an electrolyte supply device 4, a water channel switching valve 32, an electrochemical water quality measuring device 20, and the like are housed in a housing 33. It is configured. The water purification device 3 includes a filter member 34 made of antibacterial activated carbon and a filter member 35 made of a hollow fiber membrane. The two types of filter members 34 and 35 are housed in a single cartridge, respectively. So that they can be exchanged.
[0017]
The electrolytic cell 2 is divided by a diaphragm 5 into an electrode chamber 7 in which the electrode 6 is installed and an electrode chamber 9 in which the electrode 8 is installed, and the inflow passages 10 and 11 are at the bottom and the outflow is at the top. Roads 12 and 13 are provided. These outflow passages 12 and 13 are connected to discharge pipes 36 and 37 via a water passage switching valve 32. Here, the inflow channel 10 and the outflow channel 13 communicate with the electrode chamber 7 in the diaphragm 5 surrounding one electrode 6, and the inflow channel 11 and the outflow channel 12 communicate with the electrode chamber 9 surrounding the other electrode 8. However, the inflow path 10 is narrower than the inflow path 11, and is adjusted so that the flow rate flowing into the electrode 7 side is smaller than the flow rate flowing into the electrode 8 side by a ratio of 1: 3 to 1: 4. I have. Further, the above-mentioned water channel switching valve 32 connects the outflow channel 13 and the discharge tube 37 when the outflow channel 12 communicates with the discharge pipe 36, and connects the outflow channel 13 with the outflow channel 12 and the discharge pipe 37 when the outflow channel 12 communicates with the discharge pipe 37. It is constituted by an electromagnetic rotary valve or a motor type switching valve so as to communicate with the discharge pipe 36.
[0018]
A thermistor 39 and a constant flow valve 41 are connected between the switching lever unit 43 connected to the water tap 42 and the water purification device 3, and a flow detection sensor 38 and an electromagnetic sensor are provided between the water purification device 3 and the electrolytic cell 2. A valve 40 is disposed, and an electrolyte supply device 4 (calcium agent addition cylinder) is disposed in the middle of a pipe that reaches the inflow path 10 among pipes that individually connect the electromagnetic valve 40 and the inflow paths 10 and 11. ing. The solenoid valve 40 is connected to the drain port 44, and is opened after a certain period of time after the flow of water is stopped by the flow rate detection sensor 38 so that residual water in the electrolytic cell 2 and other piping systems is discharged from the drain port 44. It is. In the middle of the discharge pipe 37, the electrochemical water quality measuring device 20 is arranged. The electrochemical water quality measuring device 20 will be described later in detail.
[0019]
Next, the flow of water when generating electrolyzed water from tap water will be described. When the handle lever unit 43 connected to the tap faucet 42 is switched so that water flows to the water purification device 3 side, water is introduced into the electrolytic cell 2 from the inflow passages 10 and 11 through the water purification device 3 and the electrolyte supply device 4. The application of the electrolytic voltage in the electrolytic cell 2 is started when the flow rate sensor 38 detects the electrolytic voltage.
[0020]
If an instruction to obtain alkaline water is given, an electrolytic voltage is applied so that the electrode 6 in the electrolytic cell 2 serves as an anode and the electrode 8 serves as a cathode, and the alkaline water is supplied to the outflow channel 12 side. Thus, acidic water is obtained on the outflow path 13 side. At this time, the water channel switching valve 32 is set so that the outflow channel 12 and the discharge pipe 37 communicate with each other and the outflow channel 13 and the discharge pipe 36 communicate with each other. It is discharged to the pipe 36 side.
[0021]
When an instruction to obtain acidic water is given, the flow of the following two waters is performed according to the indicated degree of electrolysis of acidic water. First, in the case of weakly acidic water, an electrolytic voltage is applied so that the electrode 6 of the electrolytic cell 2 serves as a cathode and the electrode 8 serves as an anode, and alkaline water is supplied to the outflow channel 13 side, and (weak) to the outflow channel 12 side. An acidic water is obtained. At this time, the water channel switching valve 32 is set in the same state as described above, and the (weak) acidic water is discharged to the discharge pipe 37 and the alkaline water is discharged to the discharge pipe 36 side.
[0022]
In the case of strongly acidic ionic water, an electrolysis voltage is applied such that the electrode 6 in the electrolytic cell 2 serves as an anode and the electrode 8 serves as a cathode, and alkaline water is supplied to the outflow channel 12 side and acid water is supplied to the outflow channel 13 side. can get. At this time, the water path switching valve 32 is switched to a state in which the outflow path 12 communicates with the discharge pipe 36 and the outflow path 13 communicates with the discharge pipe 37. Water is discharged to the discharge pipe 36 side. As described above, when the strongly acidic water is discharged from the discharge pipe 37, the electrode 6 is used as the anode by narrowing the inflow path 10 toward the electrode 6 from the inflow path 11 toward the electrode 8 as described above. This is because it is easy to obtain strongly acidic water because the inflow is reduced.
[0023]
The water quality of the electrolytic water generated in the electrolytic cell 2 and discharged from the discharge pipe 37 as described above is measured by the electrochemical water quality measuring device 20 arranged between the electrolytic tank 2 and the discharge pipe 37.
As the electrochemical water quality measuring device 20, a device for measuring the pH and the oxidation-reduction potential of electrolyzed water as shown in FIG. 1A will be described. The electrochemical water quality measuring device 20 is an electrochemical sensor of a potential difference detection type, and its electrodes are composed of a working electrode (detection electrode) 28, a reference electrode 21, and a liquid junction 22, and the working electrode 28 is formed by a change in water quality. It detects a potential difference and a current change of the reference electrode 21. A working electrode portion 28 for pH measurement formed by a glass electrode having an internal electrode 26a sealed in a glass sensitive film 27, and a lead wire 44 such as a platinum wire. For the measurement of oxidation-reduction potential formed by connecting an inactive metal electrode 26b such as platinum or gold to the lead wire 44 and attaching it to the tip of an insulating coating portion 29 such as a heat-shrinkable Teflon tube or glass coated with And a working electrode unit 28.
[0024]
A liquid junction holding member 24 is provided in a lower portion of the cylindrical sensor body 1 so as to partition the sealing portion 18 from the water detecting portion 17. A liquid junction (salt bridge) 22 formed of a porous material such as ceramics is held. The liquid junction holding member 24 is formed of an insulating material such as silicon. A sealed or internal solution 16 such as a 3.3 M (mol / L) potassium chloride (KCl) solution is sealed in the sealing portion 18. The internal solution 16 contains 4000 cps for stable elution of KCl. Cellulose-based thickeners such as carboxymethylcellulose and hydroxyethylcellulose are added so as to achieve the above (usually about 10,000 cps is preferable). The comparative electrode section 21 is formed using a silver / silver chloride electrode or the like as an electrode, and is immersed in the internal solution 16. In FIG. 1A, reference numeral 15 denotes an internal solution replenishing port, reference numeral 30 denotes an inflow port provided in a lower portion of the water detecting section 17, and reference numeral 31 denotes an outflow port provided in an upper portion of the water detecting section 17, which is generated in the electrolytic layer 2. The electrolyzed water enters the lower part of the water detecting part 17 from the inflow port 30 and flows through the water detecting part 17 so as to flow out from the upper outlet 31.
[0025]
Further, the amplifier section 14 for amplifying and outputting the potential difference detected by the working electrode section 28 and the comparison electrode section 21 is provided in an amplifier casing 53 provided on the upper portion of the sensor main body 1. As shown in FIG. 1B, the amplifier unit 14 covers a surface of a printed circuit board 45 on which a mounting component 46 such as a chip component is mounted with a buffer layer 47, and covers an insulating layer 48 from above the buffer layer 47. In addition, a plurality of printed circuit boards 45 are laminated with an insulating layer 48 to form a multilayer structure. In the embodiment shown in FIG. 1B, the printed circuit board 45 is covered with an insulating layer 48 and is further housed in an amplifier case 54 to form the amplifier section 14. In FIG. 1B, reference numeral 55 denotes a terminal protruding from the amplifier unit 14.
[0026]
Here, the buffer layer 47 can be formed by molding a potting agent, such as a silicone resin, having a cured performance of 1 × 10 ¹² Ω or more and a hardness of 60 degrees or less, such as a silicone resin. The buffer layer 47 is formed at a height (thickness) covering the mounted component 46 mounted on the printed board 45. Since the potting agent generally has a high hardness when the insulation resistance is high, the potting agent for forming the buffer layer 47 is relatively low in insulation resistance of 1 × 10 ¹² Ω or more and has a hardness of 60 degrees or less. What shows performance is used. Of course, the higher the insulation resistance, the better, so the upper limit is not particularly set. In the present invention, the hardness is indicated by JIS A (see JIS K9301) using a spring-type rubber hardness tester type A, and by forming a buffer layer 47 having a hardness of 60 degrees or less, a mounting component described later is formed. 50 can effectively obtain the effect of preventing solder cracking. The hardness of the buffer layer 47 is preferably 15 degrees or more in consideration of insulation performance.
[0027]
The insulating layer 48 is formed by molding a potting agent such as urethane resin having a high electrical insulation property having a cured property of 1 × 10 ¹⁵ Ω or more after curing. Since the higher the insulation resistance of the insulating layer 48 is, the more desirable, the upper limit is not particularly set.
The buffer layer 47 below the insulating layer 48 has an insulation resistance of 1 × 10 ¹² Ω or more. By forming the multi-layered amplifier section 14 by covering the printed circuit board 45 with the insulation layer 48 as described above, the insulation resistance is reduced. There are those capable of ensuring the insulation performance of the amplifier unit at a high insulating layer 48 1 × 10 ¹⁵ Ω or more, the insulating layer 48 is higher hardness for high and the insulation resistance is 1 × 10 ¹⁵ Ω or more Since the hardness of the buffer layer 47 below the insulating layer 48 is as low as 60 degrees or less, even if the insulating layer 48 repeats expansion and contraction, the expansion and contraction of the insulating layer 48 is buffered by the buffer layer 47 and This prevents stress from acting, and prevents solder cracking of the mounted component 46.
[0028]
The lead wire 37 of the working electrode unit 28 and the comparison electrode unit 21 is connected to the terminal 55 of the amplifier unit 14 via the relay printed circuit board 49. The printed circuit board 49 and the like are covered with a filling layer 50, and these members are integrated into one block by the filling layer 50, and are accommodated in the amplifier casing 53. The filling layer 50 is formed by molding a potting agent whose performance after curing has an insulation resistance of 1 × 10 ¹⁵ Ω or more. The same material as the potting agent of the insulating layer 48 can be used.
[0029]
As described above, the amplifier section 14, the lead wires 37, the relay printed circuit board 49, and the like are covered with the filling layer 50 and integrated, so that the amplifier section 14, the lead wires 37, the relay printed circuit board 49, and the like are integrated. Can be implanted inside. Therefore, it is possible to prevent moisture from penetrating into the embed portion 14 from the interface between the lead wire 37 and the insulating layer 48, and to prevent insulation failure due to moisture penetration.
[0030]
Here, after the amplifier portion 14, the lead wires 37, the relay printed circuit board 49, and the like are previously covered with the filling layer 50 and integrated, the components are incorporated into the amplifier casing 53. After assembling the wire 37, the relay printed circuit board 49, and the like into the amplifier casing 53, the amplifier casing 53 is filled with a potting agent having an insulation resistance of 1 × 10 ¹⁵ Ω or more and hardened, so as to be hardened. The amplifier section 14, the lead wires 37, the printed circuit board 49 for relay, and the like may be covered with the filling layer 50 to be integrated.
[0031]
【The invention's effect】
As described above, the electrolyzed water generating apparatus according to the present invention generates an alkaline water and an acidic water by electrolyzing water, and an electrolytic cell for flowing out the generated alkaline and acidic electrolyzed water, and an electrolytic cell. A water quality measuring device disposed downstream and comprising a water quality measurement device for electrochemically measuring the quality of the electrolyzed water generated in the electrolysis tank; Working electrode part, sealing part for sealing the internal solution, comparison electrode part in the sealing part, porous liquid junction between the water sampling part and sealing part, and comparison with the working electrode part A water quality measurement device is formed by including an amplifier unit for amplifying and outputting a voltage between the electrode units, and a mounting component formed of a potting agent having an insulation resistance of 1 × 10 ¹² Ω or more and a hardness of 60 degrees or less on the surface of the printed circuit board. A buffer layer high enough to cover Since so as to form an amplifier portion provided with the insulating layer by ¹⁵ Omega more potting agent, it is possible to insulation resistance to ensure the insulation performance of the amplifier unit at 1 × 10 ^{15 Ω} or more and a high insulating layer, the The insulating layer has high hardness due to high insulation resistance, but the buffer layer below the insulating layer has a low hardness of 60 degrees or less. Even if the insulating layer repeatedly expands and contracts, this expansion and contraction is buffered by the buffer layer and mounted. This can prevent stress from acting on the component, and can prevent the occurrence of solder cracks in the mounted component.
[0032]
Further, according to the invention of claim 2, the amplifier section, the lead wire of the working electrode section connected to the amplifier section, the lead wire of the comparison electrode section and the like are covered with a filling layer made of a potting agent having an insulation resistance of 1 × 10 ¹⁵ Ω or more. Since each member is integrated with the filling layer, it is possible to embed the amplifier section and the lead wire in the filling layer and integrate them, and moisture is generated from the interface between the lead wire and the insulating layer. It is possible to prevent the permeation into the amplifier section and prevent the occurrence of insulation failure due to the permeation of moisture.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, in which (a) is a cross-sectional view of an example of a water quality measuring device, and (b) is a cross-sectional view of an example of an amplifier unit used by being incorporated in the water quality measuring device. It is.
FIG. 2 is a cross-sectional view illustrating a schematic configuration of an example of an embodiment of an electrolyzed water generation device according to the present invention.
FIG. 3 is a cross-sectional view illustrating a schematic configuration of an example of a conventional electrolyzed water generating apparatus.
FIG. 4 is a cross-sectional view of an example of a conventional water quality measurement device (pH sensor).
FIG. 5 is a cross-sectional view of an example of a conventional water quality measuring device (oxidation-reduction potential sensor).
FIG. 6 is a cross-sectional view of an example of a conventional water quality measuring device (an integrated type of a pH sensor and an oxidation-reduction potential sensor).
[Explanation of symbols]
2 Electrolyzer 14 Amplifier 16 Internal solution 17 Water detector 18 Enclosure 20 Water quality measuring device 21 Reference electrode 22 Liquid junction 28 Working electrode 37 Lead wire 45 Printed circuit board 46 Mounting component 47 Buffer layer 48 Insulating layer 49 Relay print Substrate 50 Filling layer

Claims (2)

Electrolysis of water to produce alkaline water and acidic water, and an electrolytic cell for discharging the generated alkaline and acidic electrolyzed water, and an electrolytic cell disposed downstream of the electrolytic cell to generate electrolytic water. A working electrode unit disposed in a water detecting unit through which the electrolytic water flows, and an internal solution is sealed in the electrolyzed water generating device formed including a water quality measuring device for electrochemically measuring the water quality of water. Sealing section, comparison electrode section disposed in the sealing section, porous liquid junction between the water detecting section and the sealing section, and amplifier section for amplifying and outputting the voltage between the working electrode section and the comparison electrode section. To form a water quality measuring device, and to provide a buffer layer having a height of covering a mounted component by a potting agent having an insulation resistance of 1 × 10 ¹² Ω or more and a hardness of 60 degrees or less on the surface of the printed circuit board and an insulation resistance of 1 × 10 ¹⁵ Omega over an insulating layer of potting agent Only electrolytic water generation apparatus characterized by comprising forming the amplifier unit. The amplifier section, the lead wire of the working electrode section connected to the amplifier section, the lead wire of the comparison electrode section, etc. are covered with a filling layer of a potting agent having an insulation resistance of 1 × 10 ¹⁵ Ω or more, and these members are integrated with the filling layer. The electrolyzed water generation device according to claim 1, wherein

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