Electrolyzed water generator for bathing facilities

Abstract

To provide an electrolytic water generation device in a bathing facility, capable of achieving a long life of an electrode while reducing power consumption and the cost of the electrode.SOLUTION: An electrolytic water generation device 30 comprises a single or plural sets of electrode units 31 each consisting of a set of two electrode plates disposed parallel to each other with a distance of about 5 mm apart, positioning a top face 31c of each of the electrode plates 31a, 31b approximately on the same height as the liquid level in an electrolytic tank 32, and feeds electricity to the electrode units 31 in the electrolytic tank 32 to generate electrolytic water obtained by mixing minute hydrogen into electrolytic hypochlorous acid water in a saturated state.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an electrolyzed water generating device for use in bathing facilities. [Background technology]

[0002] A circulating filtered water system is used in various bathing facilities, in which bathwater is extracted from the bathtub using a circulating pump, foreign matter is removed from the extracted water, and the water is returned to the bathtub. When bath water is recycled, a sticky biofilm forms in the bathtub and in the circulation path, and pathogenic microorganisms such as Legionella bacteria grow inside the biofilm.

[0003] On the other hand, the number of people infected with Geonnellosis, a disease that causes pneumonia when people inhale Legionella bacteria floating in bathing facilities, is on the rise, and the number of deaths from Geonnellosis is also increasing year by year.

[0004] As a countermeasure against such infections, it is widely known to mix a chlorine-based agent such as sodium hypochlorite into the circulation route to sterilize it.

[0005] Patent Documents 1 to 3 disclose adding electrolyzed hypochlorous acid water to bath water. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-251355 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-153879 [Patent Document 3] Japanese Patent Application Publication No. 2019-89054 Summary of the Invention [Problem to be solved by the invention]

[0007] Conventional infectious disease control technologies have the following inherent problems: The method of mixing in chlorine-based chemicals such as sodium hypochlorite causes the hot spring ingredients to change (oxidize), making it difficult to maintain the natural hot spring benefits. Adding chlorine-based chemicals not only produces a pungent odor, but also irritates the eyes and skin of bathers, causing discomfort. <c> When electrolyzed water is generated in an electrolytic cell by electrolysis, when the electrolyzed hypochlorous acid water that rises in a bubble state between the electrode plates reaches the liquid surface, it does not diffuse over a wide area but remains near the electrode plates, which makes it easy for the concentration of the electrolyzed water to vary. <E> In the method of generating electrolytic hypochlorous acid water by electrolysis, the amount of electrolytic hypochlorous acid water generated is proportional to the power consumption. Therefore, if the power consumption is increased to increase the amount of electrolytic hypochlorous acid water generated, the cost of producing electrolytic hypochlorous acid water will increase, and if the power consumption is reduced to reduce the production cost, the amount of electrolytic hypochlorous acid water generated will decrease. As described above, it has been difficult to simultaneously satisfy the requirements for power consumption during electrolysis and the amount of electrolytic hypochlorous acid water generated. <E> The electrode plates used for electrolysis wear out rapidly in proportion to the power consumption. In spa facilities that are open all year round, the lifespan of electrode plates is short, at a maximum of about one year.

[0008] The present invention has been made in view of the above points, and its object is to provide an electrolytic water generating device for the following bathing facilities. <1> To improve the diffusibility of electrolyzed water that is generated and rises between two electrode plates, thereby eliminating variations in the concentration of electrolyzed water. <2> It is possible to reduce power consumption and electrode costs while achieving a longer electrode life. <3> It can improve the bathing water to be gentle on the skin and pleasant to the touch. <4> It has a bactericidal effect not only against Legionella bacteria, but also against norovirus and coronavirus. [Means for solving the problem]

[0009] The present invention relates to a bathing facility comprising a bathtub, a raw water supply line that supplies raw water to the bathtub, a circulating filtered water system that removes bathwater from the bathtub and returns it to the bathtub, and an electrolyzed water generator that arranges multiple electrode plates in an electrolytic cell containing saltwater and performs electrolysis to produce electrolyzed water.The electrolyzed water generator comprises at least one electrode unit or multiple sets of two electrode plates arranged in parallel at a predetermined distance, and the upper surfaces of the two electrode plates have a top surface and a stepped lower surface that have a height difference.The two electrode plates are arranged in parallel with the sides facing alternately, and the top surfaces of the electrode plates are positioned at approximately the same height as the liquid level in the electrolytic cell.Electricity is passed through the electrode units in the electrolytic cell to produce electrolyzed water in which ionized hydrogen has been mixed in a saturated state with electrolyzed hypochlorous acid water. In another embodiment of the present invention, it is desirable to individually supply a current of 5 A at a voltage of 5 V to a pair of electrode plates, the spacing between which is set to 5 mm ±2 mm. In another form of the present invention, the electrolytic water generating device comprises one or more electrode units, an electrolytic cell housing the electrode units, a power supply means for supplying power to the electrode units, a reserve tank for storing the electrolytic water generated in the electrolytic cell, and a bypass path connected to the reserve tank, and is configured so that the electrolytic water in the reserve tank can be supplied to the circulation path through the bypass path. [Effects of the Invention]

[0010] The present invention has at least one of the following advantages. <1> By positioning the top surfaces of the electrode plates so that they are roughly aligned with the liquid level in the electrolytic cell, the diffusion range of the electrolyzed water that is generated and rises between the two electrode plates can be expanded, eliminating variations in the concentration of the electrolyzed water. <2> By setting the spacing between the two electrode plates to a specific dimension and halving the current value supplied to the electrode plates compared to conventional methods, it is possible to reduce power consumption and the cost of the electrode plates while ensuring a good concentration of electrolyzed water and extending the life of the electrode plates. <3> By positioning the power supply terminal at a position separated from the top surface of the electrode plate, the power supply terminal is less susceptible to the effects of electrolytic water and chlorine gas. <4> By screwing the power supply terminal onto the mounting bolt of the electrode plate via multiple nuts, the electrical contact area between the power supply terminal and the mounting bolt is increased, making it easier to pass electricity, and loosening of the nuts is prevented, preventing heat generation due to poor contact in the current-carrying part. <5> Because electrolyzed water does not contain chlorine chemicals and is saturated with ionized hydrogen, it not only reduces irritation to the bather's skin, but also makes bathing smooth and comfortable. <6> It has a bactericidal effect not only against Legionella bacteria, but also against norovirus and coronavirus. [Brief explanation of the drawings]

[0011] [Figure 1] A model diagram of an example of the bathing facility of the present invention. [Figure 2] A perspective view of a partially broken electrolyzed water generating device. [Figure 3] Electrode unit model [Figure 4] In the model diagram of the electrode unit, (A) and (B) are model diagrams of the configuration in which the top surface of the electrode plate is positioned so that it is roughly aligned with the liquid level in the electrolytic cell, and (C) is a plan view of the electrode plate to explain the diffusion direction of the electrolyzed water. [Figure 5] Model diagram of electrode plates submerged in an electrolytic cell DETAILED DESCRIPTION OF THE INVENTION

[0012] The present invention will be described in detail below with reference to the drawings.

[0013] 1. Bathing facilities with circulating filtered water systems Referring to FIG. 1, the bathing facility on which the present invention is based comprises a bathtub 10 and a circulating filtered water system that removes bathwater from the bathtub 10 and circulates it again.

[0014] 2. Bathtub The bathtub 10 is a storage bathtub for storing a large amount of bathwater for a user to take a bath in, and has a drain outlet 11 at its deepest part. The bathtub 10 is not limited to bathing, but may also be used for sports, rehabilitation, etc.

[0015] 3. Circulating filtered water system The circulating filtered water system includes a plurality of water channels R1 to R4, which will be described below, a circulation pump P1 arranged in series in one of the water channels R2, an impurity removal device, a heat converter 22, and the like.

[0016] <1> Waterways The multiple water channels R1 to R4 will be described below.

[0017] <1.1> Raw waterway The raw water channel R1 is a channel for supplying raw water (hot spring water, mineral spring water, or tap water) to the bathtub 10.

[0018] <1.2>Circulation path The circulation path R2 is the main water path for forcibly removing the bath water from the bathtub 10, filtering it, etc., and returning it to the bathtub 10. One end of the circulation path R2 is connected to the drain outlet 11 of the bathtub 10, and the other end of the circulation path R2 is connected to the side of the bathtub 10.

[0019] <1.3> Equipment placed in the circulation path In the circulation path R2, a hair catcher 20, a circulation pump P1, a filter 21 for collecting various foreign substances, and a heat converter 22 such as a boiler for heating water are arranged in series. The devices and equipment installed in the circulation route R2 are not limited to those exemplified in this example, and can be selected appropriately depending on the type of bathing facility.

[0020] <1.3.1> Circulation pump The circulation pump P1 is a pump for forcibly circulating bath water through the circulation path R2.

[0021] <1.3.2> Hair capture device The hair trapping device 20 is a device for trapping relatively large impurities.

[0022] <1.3.3> Filtration equipment The filtering device 21 filters out relatively fine impurities through a filter medium contained in a container.

[0023] <1.3.4> Heat converter The heat exchanger 22 functions to regulate the bath water temperature.

[0024] <1.3.5> Device location The positions of these devices arranged on the circulation path R2 are not limited to those shown in the drawings, and the positions can be changed as appropriate. Furthermore, the circulation path R2 may be provided with an additional device such as a known hot water storage tank as needed.

[0025] <1.4>Drainage channel A drainage channel R3 branches off from a part of the circulation channel R2, and bath water in the bathtub 10 can be discharged to the outside through the drainage channel R3.

[0026] <1.5> Collection channel An overflow groove 12 is provided around the bathtub 10, and water that overflows from the bathtub 10 and is collected in the overflow groove 12 can be guided to the circulation path R2 through the water collection path R4.

[0027] <2> Operation of the circulating filtered water system When the circulation pump P1 is operated, the bath water in the bathtub 10 starts to circulate through the circulation path R2. While the bath water is circulating, impurities are captured through a hair capture device 20 and a filtration device 21, and the bath water adjusted to an appropriate temperature through a heat converter 22 is returned to the bathtub 10.

[0028] 4. Electrolyzed water generator In the present invention, an electrolytic water generating device 30 is added to a part of the circulating filtered water system described above. The electrolyzed water generator 30 is a device for generating special electrolyzed water.

[0029] In the present invention, "special electrolyzed water" refers to electrolyzed water produced by electrolyzing salt water separate from circulating water, and refers to electrolyzed hypochlorous acid water containing a large amount of ionized hydrogen (saturated state, saturated concentration).

[0030] Referring to Figure 1, the electrolyzed water generating device 30 comprises an electrolytic cell 32 containing one or more sets of electrode units 31, each set consisting of two electrode plates 31a, 31b, an anode and a cathode, a power supply means 33 for supplying power to the electrode units 31, a reserve tank 35 for storing electrolyzed water, and a bypass line R5 connected to the reserve tank 35.

[0031] <1> Bypass road One end of the bypass line R5 is connected to the reserve tank 35, and the other end is part of the circulation line R2. The electrolytic water in the reserve tank 35 can be supplied to the circulation path R2 through a first injection pump P2 installed in a part of the bypass path R5.

[0032] <2> Reserve tank The reserve tank 35 is connected to the electrolytic cell 32 via a communication line R6 and stores the electrolytic water produced in the electrolytic cell 32. The reserve tank 35 is not essential, and the reserve tank 35 may be omitted and the bypass line R5 may be directly connected to the electrolyzed water generator 30.

[0033] <3> electrolytic cell The electrolytic cell 32 is a single-chamber electrolytic cell without a diaphragm separating the anode electrode plate 31a and the cathode electrode plate 31b for electrolyzing brine (diaphragm-less). The electrolytic cell 32 is not of a completely sealed structure, and in order to ensure safety, a portion of the hydrogen gas generated during electrolysis can be discharged to the outside and recovered. The electrolytic cell 32 contains salt water of a predetermined concentration.

[0034] <4> Electrode Unit Explaining with reference to FIGS. 2 and 3, the electrode unit 31 is configured by arranging a pair of electrode plates 31a and 31b in parallel (facing each other). The two electrode plates 31a and 31b are arranged in parallel to increase the electrolysis efficiency; if the two electrode plates 31a and 31b are arranged in series on the same line, the generated electrolyzed water will collide with each other, making it difficult for convection to occur.

[0035] The electrode plates 31a and 31b are rectangular (for example, 100 mm long x 60 mm wide x 2 mm thick).

[0036] <4.1> Electrode unit material The material of the electrode plates 31a and 31b is titanium with no coating on the surface, or a conductive metal plate with a coating on the surface. Iridium (Ir) coating It may also be one that has been subjected to The surfaces of the electrode plates 31a and 31b Iridium coating The reason for covering it with this is to efficiently generate electrolyzed water, to ensure durability (chemical resistance) that allows it to withstand long-term use even at high chlorine concentrations, and to make it easy to reapply the coating by baking it when it becomes thin.

[0037] <4.2> Electrode plate spacing The two electrode plates 31a and 31b were arranged in parallel with their side surfaces 31d, which were electrode surfaces, facing each other, and the spacing L between the two electrode plates 31a and 31b was set to 5 mm (plus or minus 2 mm).

[0038] If the distance L between the two electrode plates 31a and 31b is wider than the above-mentioned dimension, the reaction will slow down and the concentration of the generated electrolyzed water will decrease. If the arrangement distance L between the two electrode plates 31a and 31b is narrower than the above dimension, the load on the electrode plates 31a and 31b increases, shortening the life of the electrode plates 31a and 31b.

[0039] In the present invention, in order to ensure a good concentration of electrolyzed water and to extend the life of the electrode plates 31a and 31b, the spacing L between the two electrode plates 31a and 31b is set to about 5 mm.

[0040] <4.3> Top surface shape of electrode plate and installation position of mounting bolts Referring to FIG. 3, the upper surfaces of the electrode plates 31a and 31b are stepped, forming a top surface 31c from which the mounting bolts 36 protrude and a stepped lower surface 31e lower than the top surface 31c. The top surface 31c and the step bottom surface 31e are formed adjacent to each other and have a length half the side width of each of the electrode plates 31a and 31b. The difference in height between the upper surfaces of the electrode plates 31a and 31b is intended to improve the diffusion of electrolytic water produced during electrolysis, and the difference in height between the top surface 31c and the step surface 31e may be about 2 to 5 mm.

[0041] <4.4> Electrode plate arrangement The electrode plates 31a and 31b are arranged in a pair, with their orientations alternated so that the mounting bolts 36 protruding from the upper surfaces of the electrode plates 31a and 31b do not interfere with each other. In other words, the electrode plates 31a, 31b are arranged such that the side surface 31d of one of the electrode plates 31a, 31b is located to the side of the step-down surface 31e of the other electrode plate 31a, 31b.

[0042] <4.5> Electrode plate placement height The two electrode plates 31 a and 31 b are arranged so that their top surfaces 31 c are substantially flush with the liquid level in the electrolytic cell 32 . That is, the top surfaces 31c of the electrode plates 31a and 31b are arranged at approximately the same height as the water surface (waterline) W of the electrolytic cell 32.

[0043] If the upper portions of the electrode plates 31a and 31b are exposed by protruding above the liquid level in the electrolytic cell 32, the electrode reaction area will decrease, and the efficiency of the electrolytic reaction will decrease.

[0044] As shown in FIG. 5, when the electrode plates 31a and 31b are completely submerged, chlorine gas and the like generated between the electrode plates 31a and 31b accumulates directly above the electrode plates 31a and 31b and is less likely to diffuse to the surroundings.

[0045] The top surfaces 31c of the electrode plates 31a and 31b are positioned at the same height as the draft surface W of the electrolytic cell 32, and the step surfaces 31e of each electrode plate 31a and 31b are submerged near the draft surface W, so that the electrolyzed water in the electrolytic cell 32 is diffused along the draft surface W. The diffusion of electrolyzed water by the electrode plates 31a and 31b will be described later.

[0046] <4.6> Electrode plate mounting structure The mounting structure of the electrode plates 31a and 31b will be described with reference to FIG. In this example, one electrode plate 31a will be described, and the description of the other electrode plate 31b will be omitted.

[0047] A conductive mounting bolt 36 extends from the center of the top surface 31c of the electrode plate 31a, and a power supply terminal 34 is attached to this mounting bolt 36. The reason why the attachment position of the power supply terminal 34 is set at a position separated from the top surface 31c of the electrode plate 31a is to make the power supply terminal 34 less susceptible to the effects of electrolytic water and chlorine gas.

[0048] In this example, when attaching to the power supply terminal 34, the following order is arranged from bottom to top: O-ring 37a, lower washer 37b, lower nut 37c, middle washer 37d, long nut 37e, upper washer 37f, power supply terminal 34, top washer 37g, and screw 37.

[0049] The multiple nuts (lower nut 37c, long nut 37e) and multiple washers (lower washer 37b, middle washer 37d, top washer 37g) are used to increase the electrical contact area between power supply terminal 34 and mounting bolt 36 to facilitate electrical conduction, and to prevent the nuts from loosening and heat generation due to poor contact in the electrical connection.

[0050] <4.7> Number of electrode units installed In this example, two sets of electrode units 31 are arranged in the electrolytic cell 32, but the number of electrode units 31 arranged in the electrolytic cell 32 may be one, or three or more. When a plurality of electrode units 31 are arranged, an appropriate interval is provided between adjacent electrode units 31. The number of electrode units 31 to be installed in the electrolytic cell 32 can be selected appropriately.

[0051] <5> Power supply means The power supply means 33 is a means for supplying a current of a predetermined voltage to each of the electrode plates 31 a and 31 b through a power supply terminal 34 .

[0052] 5.1 Applied voltage and current In the present invention, the voltage of a general household power supply of 100V is reduced to 5V, and a current of 5A is passed through the electrode plates 31a and 31b. Conventionally, a current of 10 A was passed through the electrode plates at 5 V, but in the present invention, the current to each of the electrode plates 31a and 31b is reduced by half. The current value is reduced by half in the present invention in order to reduce the load on the electrode plates 31a and 31b and thereby extend the life of the electrode plates 31a and 31b.

[0053] <5.2> Relationship between electrode plate arrangement and current If the only goal is to extend the life of the electrode plates 31a and 31b, it is sufficient to reduce the current value. However, reducing the current reduces the amount of electrolytic water and chlorine gas produced. Therefore, in the present invention, in order to keep power consumption low while avoiding a decrease in the amount of electrolyzed water and chlorine gas produced, the spacing L between the two parallel-arranged electrode plates 31a and 31b is set to approximately 5 mm.

[0054] [How to generate electrolyzed water] A method for producing electrolyzed water using the electrolytic cell 32 will be described with reference to FIGS.

[0055] <1> brine Saltwater of a predetermined concentration is stored in the electrolytic cell 32. The salt concentration of the saltwater can be selected as appropriate. A practical salinity is 6 to 12%.

[0056] <2> electrolysis By passing a predetermined current through the electrode plates 31a and 31b arranged in parallel, salt water is electrolyzed between the electrode plates 31a and 31b, producing electrolyzed water in which ionized hydrogen is mixed into electrolyzed hypochlorous acid water. Since most of the hypochlorous acid produced in the anodic reaction is alkaline, this electrolyzed water contains hypochlorous acid ions (ClO - ) Since the surfaces of the electrode plates 31a and 31b are coated with iridium (Ir), chlorine gas is more likely to be generated.

[0057] Hydrogen also exists in ionized form and is present in high concentrations in electrolyzed hypochlorous acid water. Hydrogen that exceeds the saturated concentration is discharged outside the tank and collected.

[0058] <2.1> Diffusivity of electrolyzed water Figure 4 shows the diffusion direction of electrolyzed water generated between the two electrode plates 31a and 31b, where (A) and (B) show vertical cross-sectional views of the top surfaces 31c of the electrode plates 31a and 31b, where the mounting bolts 36 are provided, and Figure 4(C) shows a plan view of the two electrode plates 31a and 31b. In the present invention, the top surface 313c and the step-down surface 31e of each electrode plate 31a, 31b are arranged alternately, so that the electrolyzed water generated between the electrode plates 31a, 31b rises and is diffused in the reflection direction of the side surface 31d of one of the electrode plates 31a, 31b. That is, the directionality of the diffusion of the electrolytic water becomes high. Therefore, the diffusion range of the electrolyzed water that is generated between the two electrode plates 31a and 31b and floats up can be expanded, and variations in the concentration of the electrolyzed water can be eliminated.

[0059] In contrast, if the electrode plates 31a and 31b are completely submerged, chlorine gas and other substances generated between the electrode plates 31a and 31b will remain directly above the electrode plates 31a and 31b and will not easily diffuse toward the surroundings of the electrode plates 31a and 31b (FIG. 5). This can easily cause variations in the concentration of electrolyzed water.

[0060] In the present invention, when performing electrolysis, the distance L between the two parallel electrode plates 31a and 31b is set to about 5 mm, thereby enabling efficient electrolysis while keeping power consumption low.

[0061] Furthermore, since the attachment position of the power supply terminal 34 is located at a position separated from the top surface 31c of the electrode plate 31a, the power supply terminal 34 is less susceptible to the effects of electrolytic water and chlorine gas during electrolysis.

[0062] When a current is passed through the electrode plates 31a and 31b, the positive and negative poles may be switched every arbitrarily set time, thereby removing deposits from the electrode plates 31a and 31b.

[0063] The concentration and amount of electrolytic hypochlorous acid water generated in the electrolytic cell 32 can be adjusted by adjusting the salt concentration of the salt water used, the current value (ampere value) during electrolysis, the number of electrode plates, the generation time, the amount of water used for generation, etc.

[0064] <3> Electrolyzed water supply Referring to FIG. 1, electrolyzed hypochlorous acid water containing a large amount of hydrogen generated in electrolytic cell 32 is stored in reserve tank 35.

[0065] The electrolyzed water stored in the reserve tank 35 is supplied to the bathtub 10 through a bypass line R5.

[0066] <4> The effects of electrolyzed water In the present invention, the electrolyzed water continuously supplied to the bathtub 1 exerts the following multiple functions.

[0067] <4.1>Bactericidal action When electrolyzed water is supplied into the bathtub 10, the electrolyzed hypochlorous acid water contained in the electrolyzed water exerts a sterilizing effect on Legionella and other bacteria. Furthermore, since the size of ionized hydrogen is even smaller than nanobubbles, the miniaturized hydrogen itself exerts a sterilizing effect. Therefore, the bactericidal action of the electrolyzed hypochlorous acid water and the bactericidal action of the hydrogen contained in the electrolyzed water are exerted synergistically, so the bactericidal action of the electrolyzed water is significantly higher than before. This prevents the formation of sticky biofilms and improves the effect of suppressing the proliferation of pathogenic microorganisms such as Legionella bacteria inside the biofilms. Furthermore, since no chlorine-based chemicals are used as in the past, the generation of chlorine odor can be significantly reduced.

[0068] <4.2> Deodorizing effect By not using chlorine-based chemicals as in the past and by performing electrolysis in a single-chamber electrolytic cell 32 without a diaphragm, the amount of chlorine generated can be reduced. Furthermore, the miniaturized hydrogen not only has a sterilizing effect but also a deodorizing effect, so the final electrolyzed water has almost no chlorine smell.

[0069] <4.3> Reduction action Generally, when disinfection is performed using chlorine chemicals, ORP (oxidation-reduction potential) increases and the oxidizing power becomes stronger. In contrast, when disinfection is performed using electrolyzed water generated in the electrolytic bath 32, the large amount of hydrogen contained in the electrolyzed water suppresses oxidation and enhances reducing power. Generally, hydrogen is said to be easily released into the air, but the electrolyzed water generated in the electrolytic cell 32 contains a large amount of fine hydrogen (nanobubble hydrogen), which exerts reducing power and has the effect of suppressing an increase in ORP. Furthermore, when the raw water is hot spring water or mineral spring water, the oxidation phenomenon of the hot spring water or mineral spring water can be suppressed, and discoloration of the hot water can be prevented.

[0070] <4.4> Improved feel of hot water In the present invention, the electrolyzed water does not contain chlorine chemicals and contains a large amount of ionized, extremely small hydrogen, which not only reduces irritation to the bather's skin but also makes bathing smooth and comfortable.

[0071] One conventional bathing method is the hydrogen bath, which uses a hydrogen tank or hydrogen generator. However, this requires special hydrogen generation equipment and has the disadvantage that the hydrogen bubbles easily escape into the atmosphere. The present invention makes it possible to supply electrolyzed water containing a large amount of hydrogen, which cannot be obtained in conventional hydrogen baths, without using dedicated hydrogen generation equipment.

[0072] <5> Power supply means The power supply means 33 is a means for supplying a current of a predetermined voltage to each of the electrode plates 31 a and 31 b through a power supply terminal 34 .

[0073] 5.1 Applied voltage and current In the present invention, the voltage of a general household power supply of 100V is reduced to 5V, and a current of 5A is passed through the electrode plates 31a and 31b. Conventionally, a current of 10 A at 5 V was passed through the electrode plates, but in the present invention, the current to each electrode plate 31 a, 31 b is halved compared to conventional methods, and a current of 5 A at 5 V is supplied to each individual electrode plate 31 a, 31 b. The current value is reduced by half in the present invention in order to reduce the load on the electrode plates 31a and 31b and thereby extend the life of the electrode plates 31a and 31b.

[0074] <6> Electrode plate life A test was conducted on the lifespan of a conventional electrode and a pair of electrode plates 31a, 31b constituting the electrode unit 31 of the present invention, with a production volume of 50 liters. JPEG0007749212000001.jpg26145

[0075] The test results confirmed that the pair of electrode plates 31a, 31b constituting the electrode unit 31 had a lifespan that was approximately three times longer than that of conventional electrode plates.

[0076] <7> SDGs development goals This invention can prevent the formation of sticky biofilms and suppress the growth of pathogenic microorganisms such as Legionella bacteria inside the biofilms, making it possible to achieve two of the SDGs' development goals by 2030: "Development Goal 3: Ensure good health and well-being for all" and "Development Goal 9: Build resilient infrastructure, promote industry, innovation and infrastructure." Furthermore, this invention can achieve "Development Goal 3: Clean Water and Sanitation" and "Development Goal 15: Life on Land."

[0077] Furthermore, by promoting this invention through public-private partnerships based on various partnership experiences and resource strategies, it will be possible to achieve SDGs "Development Goal 8: Decent Work and Economic Growth" and "Development Goal 9: Build resilient infrastructure, promote sustainable industrialization and foster innovation."

[0078] Furthermore, this invention is based on the experience and resource strategies of various partnerships between the public and private sectors. By recommending and promoting this, we can achieve SDG development goal 17, "Build resilient infrastructure, promote inclusive and sustainable industrialization, and build resilient infrastructure." [Explanation of symbols]

[0079] R1... Raw waterway R2...Circulation path R3...Drainage channel R4...Collection channel R5: Bypass route P1 Circulation pump P2: First injection pump P3: Second injection pump 10. Bathtub 11...Drain port 12...Overflow ditch 20. Hair capture device 21. Filtration equipment 22...Thermal converter 22 30... Electrolyzed water generator 31 Electrode unit 31a...Electrode plate 31b...Electrode plate 31c: Top surface of electrode plate 31d: Side of electrode plate 31e...Underside of electrode plate 32... Electrolytic cell 33 Power supply means 35. Reserve tank

Claims

1. A bathing facility comprising a bathtub, a raw water supply line for supplying raw water to the bathtub, a circulating filtered water system for removing bathwater from the bathtub and returning it to the bathtub, and an electrolyzed water generating device for generating electrolyzed water by electrolysis using a plurality of electrode plates disposed in an electrolytic cell containing saltwater, The electrolytic water generating device includes at least one or more electrode units each consisting of a pair of electrode plates arranged in parallel at a predetermined interval, The upper surfaces of the two electrode plates have a top surface and a stepped lower surface having a height difference, The two electrode plates are arranged in parallel with their side faces alternately oriented, The top surface of the electrode plate is positioned at approximately the same height as the liquid level in the electrolytic cell, The electrode unit in the electrolytic cell is energized to generate electrolyzed water in which ionized hydrogen is mixed in a saturated state with electrolyzed hypochlorous acid water, The electrolytic water generating device comprises one or more electrode units, an electrolytic cell containing the electrode units, a power supply means for supplying power to the electrode units, a reserve tank for storing the electrolytic water generated in the electrolytic cell, and a bypass path connected to the reserve tank; The electrolytic water in the reserve tank can be supplied to the circulation path through the bypass path. Electrolyzed water generation device for bathing facilities.

2. 2. The electrolytic water generating device for a bathing facility as described in claim 1, characterized in that a voltage of 5V and a current value of 5A are individually supplied to each pair of electrode plates, the electrode plates being installed at a distance of 5 mm plus or minus 2 mm.

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