Method and apparatus for producing hydrogen water

Abstract

To provide a method for producing hydrogen water and an apparatus for producing hydrogen water, capable of storing hydrogen water in a highly concentrated state for convenient use.SOLUTION: A method of generating hydrogen water includes a negative electrode 3 which is detachable inside a pot 2 that is open at the top, and a detachable container 4 which is a non-permeable tank 11 permeable to ions and prevents or limits water permeation with a positive electrode 5 placed inside. Raw water 1 is supplied to the pot 2 and the detachable container 4, the pot 2 is sealed, pressure is reduced to degas the raw water 1, the negative electrode 3 in the pot 2 and the positive electrode 5 in the detachable container 4 are energized to electrolyze the raw water 1 to make the raw water 1 in the pot 2 as hydrogen water and the raw water 1 in the detachable container 4 as oxygen water, then the detachable container 4 is removed from the pot 2 to remove oxygen water to store hydrogen water in the pot 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method and an apparatus for producing hydrogen water with a high hydrogen concentration by degassing water.

Background Art

[0002] An apparatus for producing hydrogen water with a high hydrogen concentration by degassing and electrolyzing water has been developed (Patent Document 1). As shown in FIG. 3, Patent Document 1 describes a hydrogen water production apparatus having the following structure. The electrolytic hydrogen water production pot 901 includes a water tank portion 903 in the pot body 902, an electrolysis treatment portion 904 composed of a plus electrode 904a and a minus electrode 904b disposed opposite to each other in the pot body 902 for electrolyzing raw water 1, and an ultrasonic vibration treatment portion 905 for applying ultrasonic vibration to the raw water 1. A cylindrical or rectangular tubular vertical partition cylinder body 906 is housed in the water tank portion 903, and a diaphragm 907 is stretched at the lower part thereof. With the diaphragm 907 interposed therebetween, the minus electrode 904b is disposed outside the diaphragm 907, that is, outside the vertical partition cylinder body 906, and the plus electrode 904a is disposed inside the diaphragm 907, that is, inside the vertical partition cylinder body 906, in a state of being immersed in the raw water 1. A direct current is supplied to each electrode plate of the plus electrode 904a and the minus electrode 904b via the power supply portion 908a and the control portion 908b of the electrical equipment portion 908. Moreover, an ultrasonic vibrator 905a is disposed at the bottom of the alkaline water region of the pot body 902, and the ultrasonic vibrator driving circuit 905b is energized from the control portion 908b to apply ultrasonic vibration to the raw water 1 in the water tank portion 903.

[0003] The hydrogen water production apparatus of FIG. 3 is in a state where both hydrogen water and oxygen water are filled in the pot, so it cannot be conveniently used for applications that use only hydrogen water. Further, since this pot separates and stores hydrogen water and oxygen water with a diaphragm, it is necessary to use an extremely expensive membrane with very fine pores such as a reverse osmosis membrane or a semipermeable membrane that does not allow hydrogen water and oxygen water to pass through the diaphragm, and there is also a drawback that the manufacturing cost becomes high.

Prior Art Documents

Patent Documents

[0004] Patent Document 1 Japanese Patent Application Laid-Open No. 2018-001069 Summary of the Invention Problems to be Solved by the Invention

[0005] The present invention has been made in view of such a background, and one of its objects is to provide a method for producing hydrogen water that can store hydrogen water in a high-concentration state and be conveniently used, and a hydrogen water production apparatus. Means for Solving the Problems and Effects of the Invention

[0006] A method for producing hydrogen water according to an embodiment of the present invention includes a negative electrode detachably disposed inside a pot having an open upper portion, and a non-permeable water tank having ion permeability and preventing or restricting water permeation, and having a positive electrode disposed inside thereof. A detachable container is disposed, raw water is supplied to the pot and the detachable container, the pot is sealed, decompressed to degas the raw water, the negative electrode in the pot and the positive electrode in the detachable container are energized to electrolyze the raw water, the raw water in the pot is made into hydrogen water, and the raw water in the detachable container is made into oxygen water. Then, the detachable container is taken out of the pot to remove the oxygen water, and the hydrogen water is stored in the pot.

[0007] According to the above method for producing hydrogen water, a negative electrode is disposed in the pot of the raw water, and further, a detachable container having a positive electrode disposed therein is set inside the pot. The raw water in the pot is degassed and electrolyzed. The raw water in the pot is made into hydrogen water by the negative electrode, and the raw water in the detachable container is made into oxygen water. The detachable container is removed from the pot to remove the oxygen water from the pot, and the whole can be conveniently used as hydrogen water. Further, by disposing the negative electrode in the pot, the negative electrode has a large area, the current density of the negative electrode is lowered, and hydrogen can be quickly dissolved in the raw water in the state of fine bubbles. When the bubbles of hydrogen gas formed on the surface of the negative electrode become large, the contact area with the raw water becomes small, and further, it quickly floats in the raw water and cannot be efficiently dissolved in the raw water.

[0008] Furthermore, in the above method for producing hydrogen water, the negative electrode in the pot is detachable, and the desorption container can be taken out of the pot and used. Therefore, the negative electrode can be easily and simply removed, and foreign substances deposited on the surface due to electrolysis can be surely removed. The large-area negative electrode has a small amount of foreign substances adhering per unit area, and since there are no obstructions on the inner surface, the deposited substances can be easily and neatly removed. The deposited substances adhering to the electrode surface reduce the conductivity between the negative electrode and the raw water and suppress the generation of hydrogen. However, the inner surface of the pot that can keep the surface clean has less reduction in surface conductivity due to the deposited substances, and hydrogen can be efficiently generated at the negative electrode in the pot, enabling the rapid production of high-concentration hydrogen water.

[0009] In the method for producing hydrogen water according to another embodiment of the present invention, the pot is made of metal and is used in combination with the negative electrode.

[0010] According to the above method for producing hydrogen water, the raw water pot is made of metal and used as the negative electrode. Furthermore, inside the pot, a desorption container for arranging the positive electrode is set. The raw water in the pot is degassed and electrolyzed. The raw water in the pot is made into hydrogen water by the negative electrode, and the raw water in the desorption container is made into oxygen water. The desorption container is removed from the pot to remove the oxygen water from the pot, and the whole can be conveniently used as hydrogen water. Also, since the pot is used in combination with the metal negative electrode, the negative electrode has a large area, and the current density of the negative electrode is lowered so that hydrogen can be quickly dissolved in the raw water in the form of fine bubbles. When the bubbles of hydrogen gas formed on the surface of the negative electrode become large, the contact area with the raw water becomes small, and furthermore, it quickly floats in the raw water and cannot be efficiently dissolved in the raw water.

[0011] Furthermore, in the above method for producing hydrogen water, since the pot is used as the negative electrode and the desorption container is taken out from the pot for use, the inner surface of the pot, which is the negative electrode, can be easily and readily electrolyzed to surely remove foreign substances deposited on the surface. The large-area negative electrode has a small amount of foreign substances adhering per unit area, and since there are no obstacles on the inner surface, the deposited substances can be easily and neatly removed. The deposited substances adhering to the electrode surface reduce the conductivity between the negative electrode and the raw water and suppress the generation of hydrogen. However, the inner surface of the pot that can keep the surface clean has little reduction in surface conductivity due to the deposited substances, and hydrogen can be efficiently generated inside the pot to quickly produce high-concentration hydrogen water.

[0012] In the method for producing hydrogen water according to another embodiment of the present invention, a pulse voltage with a period of 1 msec or less is applied to the negative electrode and the positive electrode for electrolysis.

[0013] In the above method for producing hydrogen water, since a pulse voltage is applied to the negative electrode to generate hydrogen gas, the hydrogen gas generated on the electrode surface does not continuously grow into large bubbles. On the electrode surface, hydrogen gas is generated instantaneously when the pulse voltage is applied and does not grow significantly. Therefore, the bubbles have a high probability of separating from the electrode surface without growing large, reducing the average particle size of the supply separated from the electrode surface into the raw water and enabling rapid dissolution in the raw water.

[0014] A hydrogen water production apparatus according to an embodiment of the present invention includes a pot with an open upper part, a negative electrode detachably disposed inside the pot, a desorption container with a bottom that is detachably disposed inside the pot and has a positive electrode provided therein, a sealing lid detachably connected to the upper opening of the pot and capable of closing the opening of the pot, a decompression mechanism for decompressing and degassing the inside of the pot, and a DC power supply connected to the negative electrode and the positive electrode. The desorption container is a water-impermeable container that allows ions to permeate and blocks or restricts the permeation of water. The decompression mechanism decompresses and degasses the raw water in the pot and the desorption container, and the negative electrode energized by the DC power supply turns the raw water in the pot into hydrogen water.

[0015] According to the hydrogen water generating device with the above configuration, a negative electrode is disposed in the pot, and a desorption container having a positive electrode inside is detachably disposed inside the pot. The inside of the pot with an opening closed by a sealing lid is decompressed by a decompression mechanism to remove air, and a DC power supply is connected to the negative electrode and the positive electrode for electrolysis to convert the raw water in the pot into hydrogen water with the negative electrode. Therefore, the desorption container in which acidic water is generated can be removed from the pot to remove oxygen water from the pot, and the whole can be conveniently used as hydrogen water. Further, by disposing the negative electrode in the pot, the negative electrode has a large area, the current density of the negative electrode is lowered, and hydrogen can be quickly dissolved in the raw water in the state of fine bubbles.

[0016] Furthermore, in the above hydrogen water generating device, the negative electrode in the pot is detachable, and the desorption container is taken out from the pot for use. Therefore, the negative electrode can be easily and simply removed, and foreign substances deposited on the surface during electrolysis can be surely removed. The negative electrode with a large area has a small amount of foreign substances adhering per unit area, and since there are no obstacles on the inner surface, the deposited substances can be easily and cleanly removed. The deposited substances adhering to the electrode surface reduce the conductivity between the negative electrode and the raw water and suppress the generation of hydrogen. However, the inner surface of the pot that can keep the surface clean has little reduction in surface conductivity due to the deposited substances, and hydrogen can be efficiently generated at the negative electrode in the pot to quickly generate high-concentration hydrogen water.

[0017] In the hydrogen water generating device according to another embodiment of the present invention, the pot is made of metal and is used in combination with the negative electrode.

[0018] According to the hydrogen water generating device with the above configuration, a desorption container having a positive electrode inside is detachably arranged inside a metal pot used in combination with the negative electrode. The inside of the pot with its opening closed by a sealed lid is decompressed by a decompression mechanism for degassing, and then a DC power supply is connected to the negative electrode and the positive electrode for electrolysis to convert the raw water in the pot into hydrogen water at the negative electrode. Therefore, the desorption container in which acidic water is generated can be removed from the pot to remove oxygen water from the pot, and the whole can be conveniently used as hydrogen water. In addition, since the pot is used in combination with the metal negative electrode, the negative electrode has a large area, the current density of the negative electrode is lowered, and hydrogen can be quickly dissolved in the raw water in the form of fine bubbles.

[0019] Furthermore, in the above hydrogen water generating device, since the pot is used as the negative electrode and the desorption container is taken out of the pot for use, the inner surface of the pot, which is the negative electrode, can be easily and simply cleaned, and foreign substances deposited on the surface due to electrolysis can be surely removed. The negative electrode with a large area has a small amount of foreign substances adhering per unit area, and since there are no obstacles on the inner surface, the deposited substances can be easily and neatly removed. The deposited substances adhering to the electrode surface reduce the conductivity between the negative electrode and the raw water and suppress the generation of hydrogen. However, the inner surface of the pot that can be kept clean has less reduction in surface conductivity due to the deposited substances, and hydrogen can be efficiently generated inside the pot to quickly produce high-concentration hydrogen water.

[0020] In the hydrogen water generating device according to another embodiment of the present invention, the DC power supply applies a pulse voltage with a period of 1 msec or less to the electrodes.

[0021] According to such a configuration, since a pulse voltage is applied to the negative electrode to generate hydrogen gas, the hydrogen gas generated on the electrode surface does not continuously grow into large bubbles. On the electrode surface, hydrogen gas is generated instantaneously when the pulse voltage is applied and does not grow significantly. Therefore, the bubbles do not grow large, the probability of separating from the electrode surface is increased, the average particle size of the supply separated from the electrode surface into the raw water is reduced, and dissolution in the raw water can be achieved quickly.

[0022] In the hydrogen water generation device according to another embodiment of the present invention, the period of ultrasonic vibration of the negative electrode is shorter than the period of the pulse voltage of the electrode.

[0023] According to such a configuration, without continuously growing the hydrogen gas generated on the electrode surface into large bubbles, the growth of the hydrogen gas is stopped, and while in the state of fine bubbles, the electrode surface is ultrasonically vibrated and forcibly separated into the raw water. For this reason, without growing bubbles on the electrode surface, it can be quickly separated into the raw water in the state of fine bubbles, quickly dissolved in the raw water, and has the feature of being able to form high-concentration hydrogen water.

[0024] In the hydrogen water generation device according to another embodiment of the present invention, the desorption container is composed of a container body that is water-permeable and holds a predetermined shape in the pot, and a microporous membrane laminated on the inner surface of the container body, and the microporous membrane is any one of a filter paper, a reverse osmosis membrane, and a semipermeable membrane.

[0025] According to such a configuration, the desorption container is composed of a container body that is water-permeable and held in a predetermined shape, and a microporous membrane laminated on the inner surface of the container body, and the microporous membrane is any one of a filter paper, a reverse osmosis membrane, and a semipermeable membrane. Therefore, while realizing the ion permeability, when taking out the desorption container from the pot, it is possible to effectively prevent the oxygen water generated inside from leaking into the pot and reduce the decrease in the concentration of hydrogen water in the pot.

[0026] In the hydrogen water generation device according to another embodiment of the present invention, the sealing lid has a through hole connected to a decompression mechanism, a check valve is connected to the through hole, and the check valve is connected in a direction that allows air to pass from the pot to the decompression mechanism and does not allow air to pass in the reverse direction.

[0027] According to such a configuration, the pot can be efficiently decompressed in a sealed state to remove oxygen, nitrogen, carbon dioxide gas, etc. dissolved in the raw water and perform degassing.

[0028] In the hydrogen water generation device according to another embodiment of the present invention, the check valve has an opening mechanism that forcibly allows air to pass in the reverse direction.

[0029] According to such a configuration, by periodically and forcibly passing air in the reverse direction, it is possible to prevent clogging of the check valve such as deposits and dust peeled off from the electrode surface.

[0030] The hydrogen water generation device according to another embodiment of the present invention includes a constant current circuit in which a DC power supply controls the electrolysis current flowing through raw water via an electrode to a set current.

[0031] According to such a configuration, even if the conductivity of the raw water changes and the electrical resistance between the electrodes changes, the voltage between the electrodes can be controlled so that the currents flowing through the negative electrode and the positive electrode become a constant current. Therefore, when electrolyzing raw water with low conductivity, the voltage between the electrodes is increased to raise the current to the set value, and when electrolyzing raw water with high conductivity, the voltage between the electrodes is decreased to control the current between the electrodes to the set value. The DC power supply equipped with the constant current circuit can electrolyze raw water with different conductivities for a certain period of time to set the hydrogen concentration to the set value, so that all users can conveniently use the hydrogen water with the concentration at a preferable concentration.

[0032] The hydrogen water generation device according to another embodiment of the present invention includes a timer in which the DC power supply shuts off the electrode current when the electrolysis time of the raw water reaches the set time.

[0033] According to such a configuration, by setting the timer at the time when the raw water is electrolyzed and the hydrogen concentration reaches the set value, hydrogen water with a predetermined hydrogen concentration can be generated. The time when the timer shuts off the current is calculated by calculating the integrated value of the current from the amount of raw water supplied to the pot, the amount of hydrogen generated, the solubility of the generated hydrogen in the raw water, and the required hydrogen concentration of the hydrogen water, and calculating the electrolysis time from the integrated value of the current and the electrode current.

[0034] The hydrogen water generation device according to another embodiment of the present invention includes a current cutoff circuit in which the DC power supply detects that the integrated value of the electrode current reaches a predetermined amount of electricity and shuts off the current of the electrode.

[0035] According to such a configuration, even for raw water with different conductivity, the amount of electricity flowing through the electrodes during electrolysis can set the hydrogen concentration of the hydrogen water generated in the pot to a set value. The amount of hydrogen generated in the raw water in the pot by electrolysis is proportional to the integrated value of the electrolysis current, that is, the amount of electricity. For example, a DC power supply equipped with a constant current circuit can electrolyze raw water with different conductivity for a certain period of time to set the hydrogen concentration to a set value, so that all users can conveniently use the hydrogen water at a preferred concentration. The constant current circuit can control the voltage between the electrodes so that the current flowing through the minus electrode and the plus electrode remains a constant current even when the conductivity of the raw water changes and the electrical resistance between the electrodes changes.

[0036] The hydrogen water generating device according to another embodiment of the present invention includes a current cutoff circuit, a current detector for detecting the current flowing through the electrodes, an arithmetic circuit for integrating the current value detected by the current detector, and a cutoff circuit for comparing the integrated value of the current calculated by the arithmetic circuit with a set value stored in advance and cutting off the current when the calculated set value becomes the set value.

[0037] According to such a configuration, without providing a constant current circuit in the power supply circuit, the hydrogen water in the pot can be set to a predetermined hydrogen concentration. Since the electrode current of a DC power supply without a constant current circuit provided in the power supply circuit changes with the conductivity of the raw water, the current value flowing through the electrodes is detected by a current detector, calculated by an arithmetic circuit, and the integrated value of the current calculated by the arithmetic circuit is compared with a set value stored in advance. When the calculated set value becomes the set value, the current cutoff circuit is controlled to cut off the current. This DC power supply detects the electrode current, integrates the detected current value to detect the amount of electricity during electrolysis, so without making the electrode current a constant current, it detects the amount of electricity flowing through the raw water in the electrolysis state, that is, the hydrogen generation amount, and cuts off the electrode current. Therefore, without controlling the electrode current to be constant, the raw water with different conductivity can be energized to make the raw water in the pot into hydrogen water with a predetermined hydrogen concentration.

Brief Description of the Drawings

[0038]

Figure 1

Figure 2

Figure 3

Mode for Carrying Out the Invention

[0039] Hereinafter, the present invention will be described in detail with reference to the drawings. In the following description, terms indicating specific directions and positions (for example, "up", "down", and other terms including those terms) are used as necessary, but the use of those terms is for facilitating the understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meanings of those terms. Also, parts denoted by the same reference numerals in a plurality of drawings indicate the same or equivalent parts or members. Furthermore, the embodiments shown below are specific examples of the technical idea of the present invention, and do not limit the present invention below. Also, the dimensions, materials, shapes, relative arrangements, etc. of the components described below are not intended to limit the scope of the present invention only to those, but are intended to be illustrative unless otherwise specifically described. Also, the content described in one embodiment or example is applicable to other embodiments or examples. Also, the sizes and positional relationships of the members shown in the drawings may be exaggerated for clarity of explanation.

[0040] [Embodiment 1] FIG. 1 is a schematic configuration diagram of a generation device used in the hydrogen water generation method according to Embodiment 1. The hydrogen water generation method of the present invention uses the hydrogen water generation device 100 in FIG. 1 to convert raw water 1 into hydrogen water in the following steps. A negative electrode 3 that is detachably arranged is placed inside a pot 2 that is open at the top, and a desorption container 4 in which a positive electrode 5 is arranged inside a non-permeable water tank 11 that is ion-permeable and blocks or restricts the permeation of water is arranged. The raw water 1 is supplied to the pot 2 and the desorption container 4. In this state, the pot 2 is sealed and depressurized to degas the raw water 1, and after removing the dissolved gases such as oxygen, nitrogen, and carbon dioxide gas contained in the raw water 1, the negative electrode 3 in the pot 2 and the positive electrode 5 in the desorption container 4 are energized to electrolyze the raw water 1. The raw water 1 in the pot 2 is electrolyzed into hydrogen water, and the raw water 1 in the desorption container 4 is electrolyzed into oxygen water. Then, the desorption container 4 is taken out from the pot 2, and the oxygen water is removed from the pot 2 to make the whole hydrogen water.

[0041] In addition to the above generation method, a detachable negative electrode 3 is placed in the pot 2 separately from the pot 2, and the degassed raw water 1 is electrolyzed to turn the raw water 1 in the pot 2 into hydrogen water. When the raw water 1 is electrolyzed, not only hydrogen water but also oxygen water is generated. However, the oxygen water is generated not in the pot 2 but in the desorption container 4, and the desorption container 4 can be taken out of the pot 2 and removed from the pot 2. Therefore, only hydrogen water is filled in the pot 2. The desorption container 4 is arranged inside the pot 2 to generate oxygen water. Since the desorption container 4 can be made about 1 / 2 to 1 / 10 of the internal volume of the pot 2, by removing the oxygen water with the desorption container 4, 50% to 90% of the raw water 1 can be treated into hydrogen water. The desorption container 4 can be made small because the volume of hydrogen generated by electrolysis is twice as large as the volume of oxygen. Therefore, with the same gas concentration of hydrogen water and oxygen water, the internal volume of the desorption container 4 can be made 1 / 2 of that of the pot 2. Furthermore, without making the concentrations of hydrogen water and oxygen water equal, the oxygen water concentration in the desorption container 4 can be made higher than the hydrogen water concentration. Therefore, the above method can convert most of the raw water 1 into hydrogen water and can be conveniently and effectively utilized. In particular, since it can be stored and used with only hydrogen water filled in the pot 2, it can be used extremely conveniently for various purposes. Moreover, the hydrogen water generated in the pot 2 over time is not diluted by the oxygen water generated in the desorption container 4, and the hydrogen concentration can be maintained at a high level for effective utilization.

[0042] [Embodiment 2] FIG. 2 is a schematic configuration diagram of a generation device used in the hydrogen water generation method according to Embodiment 2. The hydrogen water generation method of the present invention uses the hydrogen water generation device 200 of FIG. 2 to convert raw water 1 into hydrogen water in the following steps. A desorption container 4 is arranged inside a pot 2 which is made of metal and has an open upper part and is used in combination with a negative electrode 3. Inside the desorption container 4, there is a non-permeable water tank 11 which is ion-permeable and blocks or restricts the permeation of water, and a positive electrode 5 is arranged inside the non-permeable water tank 11. Raw water 1 is supplied to the pot 2 and the desorption container 4. In this state, the pot 2 is sealed and decompressed to degas the raw water 1, and after removing the dissolved gases such as oxygen, nitrogen, and carbon dioxide gas contained in the raw water 1, the negative electrode 3 of the pot 2 and the positive electrode 5 inside the desorption container 4 are energized to electrolyze the raw water 1. The raw water 1 in the pot 2 is electrolyzed into hydrogen water, and the raw water 1 in the desorption container 4 is electrolyzed into oxygen water. Then, the desorption container 4 is taken out from the pot 2, and the oxygen water is removed from the pot 2 to make the whole hydrogen water.

[0043] The above generation method uses the metal pot 2 in combination with the negative electrode 3 to electrolyze the degassed raw water 1 so that the raw water 1 in the pot 2 becomes hydrogen water. Although the raw water 1 is electrolyzed to generate not only hydrogen water but also oxygen water, the oxygen water is generated not in the pot 2 but in the desorption container 4, and the desorption container 4 can be taken out of the pot 2 and removed from the pot 2. Therefore, only hydrogen water is filled in the pot 2. Similarly to the above, the desorption container 4 is arranged inside the pot 2 to generate oxygen water. However, since the desorption container 4 can be made about 1 / 2 to 1 / 10 of the internal volume of the pot 2, 50% to 90% of the raw water 1 can be treated into hydrogen water by removing the oxygen water with the desorption container 4. The desorption container 4 can be made small because the volume of hydrogen generated by electrolysis is twice as large as the volume of oxygen. Therefore, with the same gas concentration of hydrogen water and oxygen water, the internal volume of the desorption container 4 can be made 1 / 2 of the pot 2. Furthermore, without equalizing the concentrations of hydrogen water and oxygen water, the oxygen water concentration in the desorption container 4 can be made higher than the hydrogen water concentration. Therefore, the above method can convert most of the raw water 1 into hydrogen water and can be conveniently and effectively utilized. In particular, it can be stored and used with only hydrogen water filled in the pot 2, so it can be used extremely conveniently for various purposes. Moreover, the hydrogen water generated in the pot 2 over time is not diluted by the oxygen water generated in the desorption container 4, and the hydrogen concentration can be maintained at a high level for effective utilization.

[0044] As shown in FIG. 1, by arranging the negative electrode 3 inside the pot 2, the electrode area of the negative electrode 3 can be increased to a large area. Furthermore, as shown in FIG. 2, by using the metal pot 2 of the raw water 1 in combination with the negative electrode 3, the electrode area of the negative electrode 3 can be increased to a considerably large area. The large-area negative electrode 3 can reduce the amount of hydrogen gas generated per unit area per unit time. This is effective in making the hydrogen gas generated on the surface of the negative electrode 3 into fine bubbles. Separating the hydrogen gas from the electrode surface in the state of fine bubbles is effective in efficiently dissolving the hydrogen gas in the raw water and quickly improving the hydrogen concentration of the raw water.

[0045] Furthermore, even in the case of the highest concentration of hydrogen water, the hydrogen concentration is as low as about 1.6 ppm (25 °C). The amount of hydrogen generated by electrolysis can be calculated according to Faraday's law. With an electric charge of 2 × 96500 coulombs, 1 gram equivalent, that is, 22.4 liters, 2 g of hydrogen is generated. Assuming that all the hydrogen generated by electrolysis is dissolved in the raw water, for example, 2 liters of raw water can achieve a hydrogen concentration of 1.6 ppm with an electric charge of about 300 millicoulombs. An electric charge of 300 millicoulombs can be achieved by flowing a current of 150 μA for 2000 seconds. Therefore, by flowing a current of 150 μA through the negative electrode and the positive electrode for 2000 seconds, hydrogen water with the maximum concentration can be obtained. However, since not all the generated hydrogen is dissolved in the raw water, the amount of electricity flowing through the electrodes is adjusted considering the dissolution rate of the generated hydrogen. For example, in a device where the generated hydrogen diffuses into the raw water as extremely fine bubbles and 50% of the generated hydrogen can be dissolved in the raw water, the hydrogen concentration of 2 liters of raw water can reach the maximum value with an electric charge of 600 millicoulombs. Therefore, by flowing a current of 150 μA through the electrodes for 4000 seconds (about 70 minutes), the hydrogen concentration of the hydrogen water can reach the maximum value. Furthermore, even in a device where 10% of the generated hydrogen can be dissolved in the raw water, the hydrogen concentration of 2 liters of raw water can reach the maximum value with an electric charge of 3000 millicoulombs. Therefore, by flowing a current of 300 μA through the electrodes for 10000 seconds (about 3 hours), the hydrogen concentration of the hydrogen water can reach the maximum value.

[0046] The above method for producing hydrogen water can significantly increase the electrode area of the negative electrode 3, reduce the current density of the electrode, efficiently generate fine-bubble hydrogen gas, and quickly improve the hydrogen concentration of the raw water 1. Furthermore, after generating hydrogen water, the oxygen water is removed and only hydrogen water is stored in the pot 2, so it is possible to suppress the decrease in hydrogen concentration over time and effectively utilize it as high-concentration hydrogen water.

[0047] The method of electrolyzing raw water 1 to generate hydrogen water cannot fundamentally eliminate the deposition of foreign substances on the electrode surface. This is because metal ions of positive ions are adsorbed on the negative electrode 3. Tap water used as raw water 1 contains metal ions such as calcium and magnesium, and groundwater contains iron ions, etc. These metal ions are deposited on the surface of the negative electrode 3 by electrolysis. In the above method of generating hydrogen water, in FIG. 1, the negative electrode 3 is arranged inside the pot 2, and in FIG. 2, the pot 2 is made of metal and used in combination with the negative electrode 3, so electrolysis is performed on the negative electrode 3 with a large electrode area. Therefore, the deposits deposited on the electrode surface can be diffused and deposited on the large-area negative electrode 3, and can be easily removed by wiping or other methods after use, always maintaining the electrode surface in a clean state, that is, a state with excellent conductivity with the raw water 1, and realizing the characteristic of efficiently generating hydrogen water. Furthermore, in FIG. 1, both the negative electrode 3 and the desorption container 4 are detachable. In FIG. 2, the pot is made of metal and used in combination with the negative electrode, and the desorption container 4 is detachable. In any case, the desorption container 4 detachably arranged inside the pot 2 can be taken out of the pot 2, and the deposits on the electrode surface can be easily removed by wiping or other methods without any obstacles.

[0048] For the method of generating hydrogen water, a pulse voltage with a period of 1 msec or less can be applied to the negative electrode 3 and the positive electrode 5. That is, by applying a pulse voltage to the negative electrode 3 to generate hydrogen gas, the hydrogen gas generated on the electrode surface is continuously grown without forming large bubbles, and hydrogen gas is generated on the electrode surface at the moment when the pulse voltage is applied. Since this time is short, it does not grow large and quickly separates from the electrode surface to become fine bubbles. Therefore, it has the feature of reducing the average particle size of the bubbles separated in the raw water 1 and enabling rapid dissolution with the raw water 1.

[0049] The method of generating hydrogen water can also be electrolysis by eliminating the gas layer between the raw water 1 and the sealed lid 9 at the upper part of the pot and bringing it into a sealed pressurized state after depressurizing and degassing. By dissolving hydrogen in the raw water 1 after degassing under a pressurized state, the dissolved concentration of hydrogen gas can be extremely increased. Although not shown in the figure, examples of the pressurization method include a method of squeezing out the gas layer by lifting the bottom with a rotating screw, a method of using spring air with a bottom-lifting method on a syringe (a vacuum pump 12 for degassing can be used), etc. However, it is not limited to these methods, and any other method that can achieve a predetermined pressurized state can be adopted. In order to reduce the gas layer at the upper part of the pot 2 in advance, it can also be made into a gentle conical shape that narrows toward the center of the upper part of the pot 2.

[0050] The raw water 1 in the pot 2 is electrolyzed into hydrogen water, and the raw water 1 in the desorption container 4 is electrolyzed into oxygen water. Then, the desorption container 4 can be taken out from the pot 2, the oxygen water can be removed from the pot 2, and the whole can be used as hydrogen water. (Hydrogen water generating devices 100, 200)

[0051] The hydrogen water generating device 100 shown in Fig. 1 includes a pot 2 with an open upper end, a negative electrode 3 detachably arranged inside the pot, a desorption container 4 detachably arranged inside the pot 2 and provided with a positive electrode 5 inside, a sealed lid 9 detachably connected to the opening 2a above the pot 2 and sealing it so as to close the opening 2a of the pot 2, a decompression mechanism 18 for removing and degassing gases such as oxygen, nitrogen, and carbon dioxide dissolved in the raw water 1 by depressurizing the pot 2 in a sealed state, and a DC power supply 21 connected to the negative electrode 3 and the positive electrode 5.

[0052] The hydrogen water generation device 200 shown in Fig. 2 includes a metal pot 2 with an open upper end and used in combination with the negative electrode 3, a detachable container 4 detachably arranged inside the pot 2 and provided with a positive electrode 5 inside, a sealing lid 9 detachably connected to the opening 2a above the pot 2 and sealing it so as to be able to close the opening 2a of the pot 2, a decompression mechanism 18 that decompresses the pot 2 in a sealed state to remove gases such as oxygen, nitrogen, and carbon dioxide dissolved in the raw water 1 for degassing, and a DC power supply 21 connected to the negative electrode 3 and the positive electrode 5.

[0053] (Pot 2) When the pot 2 is used in combination with the negative electrode 3 as shown in Fig. 2, it is fabricated by forming it into a cylindrical shape with the bottom closed by a metal plate made of aluminum or stainless steel. When the negative electrode 3 is arranged inside the pot 2 as shown in Fig. 1, the material is not limited and it can also be made of plastic. The cylindrical pot 2 is preferably cylindrical, but it is not limited to a cylinder and can be, for example, elliptical or rectangular in cross-section. The internal volume of the pot 2 is set to an optimal value considering the application. For example, in a household device, it can be, for example, 1 liter to 10 liters. In an agricultural or industrial device, the volume of the pot 2 is increased to 100 liters to 1000 liters to generate a large amount of hydrogen water. The upper edge of the pot 2 is formed in a planar shape so that the opening 2a above the pot 2 can be sealed by the sealing lid 9. As shown in Figs. 1 and 2, the cross-sectional shape is a flat surface or a curved shape, and it can be hermetically sealed through the packing 10. Also, in order to reduce the air layer between the raw water 1 and the sealing lid 9 at the upper part of the pot 2 in advance, it can be made into a gentle conical shape that narrows towards the center of the upper part of the pot 2. In this case too, the cross-sectional shape of the opening 2a above the pot 2 can be a flat surface or a curved shape.

[0054] Furthermore, the pot 2 shown in FIGS. 1 and 2 has its lower part fixed to the base 32 and is arranged in a vertical posture. The base 32 shown in the figure has a concave shape at the upper part that can fit the bottom of the pot 2, enabling the pot 2 to be stably supported. As shown in FIG. 2, when the pot 2 is used in combination with the negative electrode 3, the base 32 is made of an insulating material, allowing the metal pot 2 to be arranged in an insulated state with respect to the installation surface. Also, the base 32 can form a storage part 32a with an upward opening at the central part. When hydrogen is dissolved in the raw water 1 after degassing by eliminating the air layer at the upper part of the pot 2 after degassing and bringing it into a sealed and pressurized state for electrolysis, a slide-type lock (not shown) can also be provided in the storage part 32a. The slide-type lock has a structure such that when the lock is removed, it slides upward, eliminating the air layer at the upper part of the pot 2 and enabling it to be fixed in a sealed and pressurized state.

[0055] (Sealing lid 9) The pot 2 seals the upper opening 2a with the sealing lid 9 in a state where the raw water 1 is degassed. The sealed pot 2 is depressurized to degas the gas dissolved in the raw water 1. The sealing lid 9 has a shape adapted to the upper opening 2a of the pot 2, and a packing 10 is in close contact with the lower surface. The packing 10 is a rubber-like elastic body that is in close contact with the opening 2a of the pot 2 to hermetically seal the pot 2. As an example, the packing 10 shown in FIGS. 1 and 2 has an insertion part 10a that is inserted inside the opening 2a of the pot 2, and the insertion part 10a is elastically pressed against the inner surface of the opening 2a to hermetically seal the opening 2a. The rubber-like elastic packing 10 can also be structured to be placed on the outer peripheral edge of the opening 2a of the pot 2 and adhere thereto without gaps. This packing 10 is adsorbed to the outer peripheral edge of the opening 2a when the inside of the pot 2 is depressurized, sealing the opening 2a of the pot 2.

[0056] The sealed lids 9 in FIGS. 1 and 2 have through holes 9a that penetrate vertically, and the through holes 9a are connected to check valves 13. The sealed lid 9 in FIG. 1 fixes a pipe 14 to the through hole 9a, connects a suction hose 15 to the pipe 14, and connects a check valve 13 to the suction hose 15. Although not shown, the check valve 13 can also be provided on the sealed lid 9 or on the suction side of the decompression mechanism 18. The check valve 13 is a valve that exhausts air from the pot 2 toward the outside but does not allow air to pass through in the reverse direction. A sphere 13b is arranged on a downwardly tapered valve seat 13a. The sphere 13b is pressed against the valve seat 13a by its own weight or via a compression spring to prevent outside air from flowing back into the pot 2. The through hole 9a connected to the check valve 13 can hold the inside of the pot 2 in a decompressed state after decompressing the inside of the pot 2 with the decompression mechanism 18, stopping the operation of the decompression mechanism 18, or removing the suction hose 15, so that the raw water 1 can be degassed.

[0057] The hydrogen water generation devices 100 and 200 shown in FIGS. 1 and 2 can be electrolyzed in a sealed and pressurized state by eliminating the air layer above the pot 2 after decompression and degassing with the sealed lid 9 in a state of sealing the pot 2. It is a device that can achieve an extremely high hydrogen dissolution concentration. Although not shown, a safety valve can be provided. Similar to the check valve 13, a pipe can be fixed to the through hole and a safety valve can be provided on the suction hose, or a safety valve can be directly provided on the sealed lid 9.

[0058] (Desorption container 4) The desorption container 4 has ion permeability so that it can be energized to the negative electrode 3 and the positive electrode 5 at the timing of electrolysis. It is a non-water-permeable and non-permeable water tank 11 that can be taken out from the pot 2 in a state where oxygen water is generated inside by electrolysis, and the oxygen water generated inside can be taken out from the pot 2. The desorption container 4 shown in FIGS. 1 and 2 has a water-permeable container body 4a that maintains a predetermined shape inside the pot 2, and a microporous membrane 4b is laminated on the inside. The container body 4a is manufactured, for example, by press-forming a metal porous plate into a container shape, or by molding a thermoplastic into a net-like or porous plate-shaped container, or by manufacturing a water-permeable unglazed container.

[0059] The microporous membrane 4b has ion permeability, and in a state where it is lifted from the pot 2, the oxygen water does not leak or leaks very little, that is, a substantially water-impermeable sheet material can be used. In this specification, the "substantially water-impermeable sheet" means, for example, a sheet in which the leakage of the oxygen water generated inside is 1 / 10 or less at the timing of taking it out from the pot 2. The desorption container 4 taken out from the pot 2 with the leakage of the internal oxygen water being 1 / 10 or less has a very small decrease in the concentration of the hydrogen water in the pot 2 and can be actually used. In addition, for this water-impermeable sheet with this property, filter paper, reverse osmosis membrane, semipermeable membrane, etc. can be used. These sheets are formed into a bag shape and laminated on the inner surface of the container body 4a.

[0060] In addition, an unglazed fired container that is fired without applying glaze to the surface can be manufactured in a state where there is almost no water leakage, so it can be used for the desorption container 4 without providing the microporous membrane 4b on the inner surface. However, the unglazed fired container can also be made into a more excellent water-impermeable container by laminating a plastic microporous membrane 4b used for a reverse osmosis membrane on the inner surface. Furthermore, instead of the unglazed fired container, a rock with ion permeability and almost no water permeability can be cut and processed into a container. This container can also be manufactured in a state where there is almost no water leakage, so it can be used for the desorption container 4 without providing the microporous membrane 4b on the inner surface. However, similar to the unglazed fired container, it can also be made into a more excellent water-impermeable container by laminating a plastic microporous membrane 4b applied to the base sheet of the reverse osmosis membrane.

[0061] As shown in FIGS. 1 and 2, the detachable container 4 has a positive electrode 5 disposed at the center of a cylindrical shape. The positive electrode 5 is preferably a titanium plate with a platinum plating on its surface, but other metal plates or carbon electrodes can also be used. As the structure of the electrode, a structure such as a mesh or punching metal is preferable. This is because water can pass through, the dissolution concentration can be made uniform by the stirring effect, and rare and expensive platinum and titanium can be saved by reducing the opposing area of each electrode. In FIG. 1, the positive electrode 5 is fixed to the central portion of the detachable container 4 via a support portion 6a of the bottom lid 4c of the detachable container 4. The upper end is connected and fixed to the sealing lid 9 and is connected to the positive side output terminal 21a of the DC power supply 21 via a conductive metal socket 28a and an external connector 29. In FIG. 2, the positive electrode 5 is fixed to the central portion of the detachable container 4 via a support ring 6. The upper end is fixed by a conductive metal vertical rod 7. The vertical rod 7 is connected to the positive side output terminal 21a of the DC power supply 21 via a lead line 8 fixed to the sealing lid 9. The lead line 8 has an airtight structure, penetrates the sealing lid 9, and is provided with a connector 28 into which the vertical rod 7 is inserted at the lower end for electrical connection. The connector 28 sets the sealing lid 9 at a fixed position of the pot 2, inserts the vertical rod 7, and makes an electrical connection. The upper end of the lead line 8 is connected to the DC power supply 21 via an external connector 29. Further, the positive electrode 5 is not limited to the above structure, and any structure shown in FIGS. 1 and 2 or any other structure that can fixedly arrange the positive electrode 5 at a predetermined position in the detachable container 4 can be adopted.

[0062] As shown in FIGS. 1 and 2, the above-described detachable container 4 is arranged in a vertical posture at the central portion within the pot 2. For example, the detachable container 4 in FIG. 2 is arranged at a predetermined position within the pot 2 via the fixing member 33. The fixing member 33 in the figure is composed of a plurality of guide arms 33a fixed to the upper and lower portions of the outer peripheral surface of the cylindrical detachable container 4. The fixing member 33 arranges the plurality of guide arms 33a in a posture extending radially from the outer peripheral surface of the detachable container 4. The fixing member 33 provided at the upper portion of the detachable container 4 has the plurality of guide arms 33a in a horizontal posture, and the fixing member 33 provided at the bottom portion of the detachable container 4 has the plurality of guide arms 33a in an inclined posture extending downward toward the outside, so that the lower surface of the detachable container 4 can be supported in a posture separated from the bottom surface of the pot 2. The plurality of guide arms 33a fix the rear end portion to the outer peripheral surface of the detachable container 4, and a buffer portion 33b is provided at the tip end. By bringing the buffer portion 33b into contact with or approaching the inner peripheral surface of the pot 2, the detachable container 4 can be arranged at a fixed position at the central portion of the pot 2. The above-described fixing member 33 fixes the plurality of guide arms 33a to the outer peripheral surface of the detachable container 4, but the fixing member 33 composed of the guide arms 33a can also be made detachable from the detachable container 4. Further, the fixing member is not limited to the above structure, and any other structure that can detachably arrange the detachable container at a predetermined position within the pot can be adopted. As shown in FIG. 1, the detachable container 4 can be connected and fixed to the sealing lid 9. For example, the container body 4a of the detachable container 4 can be connected and fixed to the sealing lid 9 with screws, fasteners, etc., and the bottom lid 4c of the detachable container 4 can be used as the lower lid. The support portion 6a of the bottom lid 4c can support the positive electrode 5 from below. Further, the detachable container 4 is not limited to the above structure, and any other structure that can arrange and connect the detachable container 4 at a predetermined position can be adopted.

[0063] Since the cathode gas (hydrogen) generated at the negative electrode 3 and the anode gas (oxygen) generated at the positive electrode 5 are generated in a ratio of 2:1, the volume ratio of the cathode water chamber within the pot 2 and the anode water chamber within the detachable container 4 (non-permeable water tank 11) is preferably 2:1. In the case of this ratio, since the solubility of hydrogen is lower than the solubility of oxygen, the cathode water side becomes high pressure, and the mixing of oxygen into the cathode water can be prevented.

[0064] (Pressure reducing mechanism 18) In the hydrogen water generation device 100 shown in FIG. 1, the vacuum pump 12 of the pressure reducing mechanism 18 is connected to the sealing lid 9 via the suction hose 15. The vacuum pump 12 forcibly exhausts the internal air in a state where the opening 2a of the pot 2 is hermetically sealed by the sealing lid 9 to reduce the pressure inside the pot 2 and degas the molten gas of the raw water 1.

[0065] Furthermore, as shown in FIG. 1, the pressure reducing mechanism 18 can also use a pump 16 connected to the bottom of the pot 2 to suck the raw water 1. This pump 16 forcibly sucks out the raw water 1 from the sealed pot 2 to reduce the internal pressure and degas it. The pump 16 in FIG. 1 includes a cylinder 16a, a piston 16b that reciprocates inside the cylinder 16a, a check valve 16c connected to the suction side and the discharge side of the cylinder 16a, and a push spring 16d that elastically pushes up the piston 16b. This pump 16 allows the user to push down the piston 16b to drain the raw water 1 sucked into the cylinder 16a, and the piston 16b is pushed up by the push spring 16d to suck the raw water 1 inside the pump 16, forcibly draining the raw water 1 inside the pot 2 to reduce the pressure. As shown in FIG. 1, an on-off valve 17 is provided between the pot 2 and the pump 16.

[0066] Furthermore, after reducing the pressure and degassing, it is also possible to eliminate the air layer between the raw water 1 and the sealing lid 9 at the upper part of the pot to make it in a hermetically sealed and pressurized state and perform electrolysis. By dissolving hydrogen in the degassed raw water 1 under a pressurized state after vacuum degassing, the dissolved hydrogen gas concentration can be made extremely high. Although not shown in the figure, examples of the pressurization method include, for example, a method of raising the bottom with a rotating screw to squeeze out the air layer, a method of using spring air with a bottom-raising method on a syringe (the vacuum pump 12 for degassing can be used), etc., but it is not limited to these methods, and any other structural method that can achieve a predetermined pressurized state can be adopted. In order to reduce the air layer at the upper part of the pot 2 in advance, it is also possible to make it into a gentle conical shape that narrows toward the center of the upper part of the pot 2.

[0067] (DC power supply 21) The DC power supply 21 is connected to the negative electrode 3 and the positive electrode 5 via the lead wire 30 and the external connector 29. The positive electrode 5 is connected to the positive output terminal 21a of the DC power supply 21 by connecting the lead wire 30 via the external connector 29 fixed to the sealing lid 9. The negative electrode 3 is connected to the negative output terminal 21b of the DC power supply 21 via the external connector 29 fixed to the pot 2 and the lead wire 30.

[0068] The DC power supply 21 can apply a DC voltage that always flows a constant current to the negative electrode 3 and the positive electrode 5. Preferably, a pulse voltage is applied to reduce the particle size of the bubbles generated on the electrode surface. This DC power supply 21, for example, sets the period of the pulse voltage to 1 msec or less, preferably 100 μsec or less, to shorten the time for applying the DC voltage to the electrode. The DC power supply 21 with a pulse voltage period of 1 msec or less sets the pulse voltage frequency to 1 kHz or more, and the DC power supply 21 with a period of 100 μsec or less sets the pulse voltage frequency to 10 kHz or more. This generating device suppresses the growth of bubbles on the electrode surface and reduces the bubbles dispersed in the raw water 1 by making the time during which a voltage is applied to the electrode surface, that is, the time width during which the electrode electrolyzes water to generate hydrogen, extremely short. The DC power supply that outputs a pulse voltage can vary, for example, in the range of 10 kHz to 1 MHz without keeping the period of the pulse voltage constant. The period for varying the frequency can be 1 / 100 to 1 / 10 of the pulse voltage frequency. The DC power supply that varies the pulse voltage frequency can change the time width for applying the voltage to the electrode surface over time, and can forcibly disperse the bubbles generated on the surface into the raw water 1.

[0069] The DC power supply 21 in FIG. 1 includes a power supply circuit 22 and a current cut-off circuit 23. The power supply circuit 22 outputs a DC current for electrolyzing the raw water 1. The power supply circuit 22 in FIG. 1 can control the amount of electricity flowing through the electrodes during electrolysis with the current cut-off circuit 23 to set the hydrogen concentration of the hydrogen water generated in the pot 2 to a set value.

[0070] The amount of hydrogen generated in the raw water 1 in the pot 2 by electrolysis is proportional to the integrated value of the electrolysis current, that is, the amount of electricity. For raw water 1 with different conductivities, even if a constant voltage is applied to the negative electrode 3 and the positive electrode 5, the current value changes. Compared with raw water with a high conductivity, the current flowing through the electrodes for raw water 1 with a low conductivity becomes smaller, and the amount of hydrogen generated per unit time is less. In an apparatus where the amount of hydrogen generated varies with the conductivity of the raw water 1, the electrolysis time changes in order to achieve a predetermined hydrogen concentration. This apparatus cannot be conveniently and effectively used by all users with the raw water 1 at a predetermined hydrogen concentration.

[0071] This drawback can be eliminated by providing a constant current circuit (not shown) in the power supply circuit 22 to control the output current to a constant current. The constant current circuit controls the voltage between the electrodes so that the current flowing through the negative electrode 3 and the positive electrode 5 remains a constant current even when the conductivity of the raw water 1 changes and the electrical resistance between the electrodes changes. Therefore, when electrolyzing raw water 1 with a low conductivity, the voltage between the electrodes is increased to raise the current to the set value, and when electrolyzing raw water 1 with a high conductivity, the voltage between the electrodes is lowered to control the current between the electrodes to the set value. The DC power supply 21 equipped with a constant current circuit can electrolyze raw water 1 with different conductivities for a certain period of time to set the hydrogen concentration to the set value, so that all users can conveniently use the hydrogen water at a preferred concentration.

[0072] Furthermore, the DC power supply 21 equipped with a constant current circuit can be used more conveniently by providing a current cutoff circuit 25 with a timer 27 that cuts off the electrode current when the electrolysis time of the raw water 1 reaches the set time. The time when the timer 27 cuts off the electrode current is set to the time when the hydrogen concentration becomes the set value by electrolyzing the raw water 1. The time when the timer 27 cuts off the current is calculated by calculating the integrated value of the current from the amount of raw water supplied to the pot 2, the amount of hydrogen generated, the solubility of the generated hydrogen in the raw water, and the required hydrogen concentration of the hydrogen water, and then calculating the electrolysis time from the integrated value of the current and the electrode current.

[0073] The DC power supply 21, in which the current cutoff circuit 23 detects the integrated value of the electrode current and cuts off the electrode current, can make the hydrogen water in the pot 2 reach a predetermined hydrogen concentration without providing a constant current circuit in the power supply circuit 22. As shown in FIG. 1, this DC power supply 21 includes a current detector 25 that detects the current flowing through the electrode, an arithmetic circuit 24 that integrates the current value detected by the current detector 25, and a cutoff circuit 26 that compares the integrated value of the current calculated by the arithmetic circuit 24 with a preset value stored in advance and cuts off the current when the calculated set value reaches the set value. Since the electrode current of the DC power supply 21 without a constant current circuit provided in the power supply circuit 22 changes according to the conductivity of the raw water 1, the current flowing through the electrode is detected by the current detector 25. The current value detected by the current detector 25 is calculated by the arithmetic circuit 24, and the integrated value of the current calculated by the arithmetic circuit 24 is compared with a preset value stored in advance. When the calculated set value reaches the set value, the cutoff circuit is controlled to cut off the current. Since this DC power supply 21 detects the electrode current, integrates the detected current value, and detects the amount of electricity during electrolysis, without making the electrode current a constant current, it detects the amount of electricity flowing through the raw water 1 in the state of electrolyzing the raw water 1, that is, the hydrogen generation amount, and cuts off the electrode current. Therefore, without controlling the electrode current to be constant, it is possible to energize the raw water 1 with different conductivities to make the raw water 1 in the pot 2 into hydrogen water with a predetermined hydrogen concentration.

[0074] The above hydrogen water generation device 100 makes the raw water 1 in the pot 2 into hydrogen water in the following steps. (1) Place the desorption container 4 in the pot 2 and supply the raw water 1 into the pot 2 and the desorption container 4. (2) Seal the opening 2a of the pot 2 with the sealing lid 9. (3) Decompress the inside of the pot 2 with the decompression mechanism 18 to degas the dissolved gas in the raw water 1, and then stop the operation of the decompression mechanism 18. (4) Connect the DC power supply 21 to the negative electrode 3 and the positive electrode 5, and the DC power supply 21 applies a voltage to the electrodes to electrolyze the raw water 1. The raw water 1 electrolyzed in the pot 2 becomes hydrogen water, and the raw water 1 in the desorption container 4 becomes oxygen water. (5) Separate the sealing lid 9 from the pot 2, take out the desorption container 4 from the pot 2, and make the inside of the pot 2 only hydrogen water.

Industrial Applicability

[0075] The hydrogen water generation method and generation apparatus of the present invention are suitably used for the generation of high-concentration hydrogen water.

Explanation of Signs

[0076] 100, 200... Generation apparatus 1... Raw water 2... Pot 2a... Opening 3... Negative electrode 4... Desorption container 4a... Container body 4b... Microporous membrane 4c... Bottom lid 5... Positive electrode 6... Support ring 6a... Support part 7... Vertical rod 8... Lead-out line 9... Sealing lid 9a... Through hole 10... Packing 10a... Insertion part 11... Non-permeable water tank 12... Vacuum pump 13... Check valve 13a... Valve seat 13b... Sphere 14... Pipe 15... Suction hose 16... Pump 16a... Cylinder 16b... Piston 16c... Check valve 16d... Compression spring 17... On-off valve 18... Pressure reducing mechanism 21... DC power supply 21a... Positive side output terminal 21b... Negative side output terminal 22... Power supply circuit 23... Current cut-off circuit 24... Arithmetic circuit 25... Current detector 26... Cut-off circuit 27... Timer 28… Connector 28a… Socket 29… External connector 30… Lead wire 32… Base 32a… Storage part 33… Fixing member 33a… Guide arm 33b… Buffer member 901… Electrolytic hydrogen water generation pot 902… Pot body 903… Water tank part 904… Electrolysis processing part 904a… Positive electrode 904b… Negative electrode 905… Ultrasonic vibration processing part 905a… Ultrasonic vibrator 905b… Ultrasonic vibrator drive circuit 906… Vertical partition cylinder 907… Diaphragm 908… Electrical equipment part 908a… Power supply part 908b… Control part

Claims

1. Inside a pot with an open top, a negative electrode detachably arranged, a non-permeable water tank that is permeable to ions and blocks or restricts the permeation of water, and a detachable container with a positive electrode arranged inside are arranged, raw water is supplied to the pot and the detachable container, the pot is sealed and decompressed to degas the raw water, electricity is applied to the negative electrode in the pot and the positive electrode in the detachable container to electrolyze the raw water, after the raw water in the pot is made into hydrogen water and the raw water in the detachable container is made into oxygen water, the detachable container is taken out of the pot to remove the oxygen water, A method for producing hydrogen water, characterized by storing hydrogen water in the pot.

2. A pot with an open top, a negative electrode detachably arranged inside the pot, a detachable container with a bottom that is detachably arranged inside the pot and has a positive electrode inside and is closed at the bottom, a sealing lid detachably connected to the upper opening of the pot and capable of closing the opening of the pot, a decompression mechanism for decompressing and degassing the inside of the pot, a DC power source connected to the negative electrode and the positive electrode, comprising, the detachable container is, a non-water-permeable container that permeates ions and blocks or restricts the permeation of water, the decompression mechanism decompresses and degasses the raw water in the pot and the detachable container, the negative electrode energized by the DC power source, A hydrogen water generation device, characterized in that the raw water in the pot is made into hydrogen water.

3. A hydrogen water generation device according to Claim 2, characterized in that the pot is made of metal and is used in combination with the negative electrode.

4. A hydrogen water generation device according to Claim 2 or 3, wherein the DC power source, applies a pulse voltage with a period of 1 msec or less to the electrodes.

5. A hydrogen water generation device according to any one of Claims 2 to 4, wherein the detachable container, comprises a container body that is water-permeable and maintains a predetermined shape in the pot, and a microporous membrane laminated on the inner surface of the container body, the microporous membrane, is any one of filter paper, reverse osmosis membrane, and semi-permeable membrane.

6. A hydrogen water generation device according to any one of Claims 2 to 5, wherein the sealing lid has a through hole connected to the decompression mechanism, a check valve is connected to the through hole, the check valve, Air passes from the pot toward the decompression mechanism, and is connected in a direction that does not allow air to pass in the reverse direction. A hydrogen water generation device characterized by this. **Claim 7** A hydrogen water generation device according to any one of claims 2 to 6, wherein the DC power supply is provided with a constant current circuit that controls the electrolysis current flowing through the raw water via the electrodes to a set current. A hydrogen water generation device characterized by this. **Claim 8** A hydrogen water generation device according to any one of claims 2 to 7, wherein the DC power supply when the electrolysis time of the raw water reaches the set time, is provided with a timer that cuts off the electrode current. A hydrogen water generation device characterized by this. **Claim 9** A hydrogen water generation device according to any one of claims 2 to 8, wherein the DC power supply is not provided with a current cut-off circuit that detects that the integrated value of the electrode current has reached a predetermined amount of electricity and cuts off the current of the electrodes. A hydrogen water generation device characterized by this.

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