JP2016123953A - Device of producing weak acid reduction water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently produce weak acid reduction water that is used for, for example, facial cleansing with bath water, a shower and others.SOLUTION: A functional water production apparatus (1) supplies, from first and second power supply circuits (31, 32), such power that a metal electrode (11c) of a first electrolytic cell (11) in a front stage becomes positive and an ion absorption electrode (11d) becomes negative, and a metal electrode (12c) of a second electrolytic cell (12) in a subsequent stage becomes negative and an ion absorption electrode (12d) becomes positive.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for weakly acidic reduced water used, for example, for face washing using hot water in a bath or shower.

  In recent years, weakly acidic reduced water has attracted attention from the viewpoint of having a beauty effect on human skin. As a conventional apparatus for producing weakly acidic reduced water, for example, one disclosed in Patent Document 1 is known.

  In the apparatus disclosed in Patent Document 1, an electrolysis unit having an anode and a cathode is provided in an electrolysis vessel, and acidic water is generated by electrolyzing water supplied in the electrolysis vessel in the electrolysis unit. . The present invention is configured to increase the pH and the amount of dissolved hydrogen in the acidic water by electrolyzing the generated acidic water with a current whose polarity is reversed after flowing through the electrode of the electrolysis section. It has become.

JP 2010-111080 A (published May 27, 2010)

  However, the above-described conventional configuration is only supposed to be a batch type of water treatment, such as bath water, when continuously treating water to obtain a lot of weakly acidic reduced water, It is inefficient. That is, in the batch-type configuration disclosed in Patent Document 1, when water is continuously processed to obtain a large amount of weakly acidic reduced water, a circulating type (acid soft water is obtained by subjecting the circulating water to forward electrolysis. Then, it is necessary to carry out by a method of reversely electrolyzing the acid-softened water and further circulating it. In such a system, the treatment for obtaining weakly acidic reduced water becomes complicated, and it is difficult to obtain weakly acidic reduced water continuously.

  Accordingly, an object of the present invention is to provide a production method and a production apparatus for weakly acidic reduced water that can efficiently produce weakly acidic reduced water.

  In order to solve the above problems, a weakly acidic reduced water production apparatus according to an aspect of the present invention includes a first electrolytic cell having a metal electrode and an ion adsorption electrode therein, and a metal electrode and an ion adsorption electrode therein. The second electrolytic cell connected in series to the first electrolytic cell, and the first electrolytic cell located upstream of the flow of water among the first electrolytic cell and the second electrolytic cell. The electric power that the metal electrode has a positive polarity, the ion adsorption electrode has a negative polarity, the metal electrode of the latter-stage electrolytic cell located on the downstream side of the water flow has a negative polarity, and the ion adsorption electrode has a positive polarity. And a power supply unit that supplies the electrodes.

  According to one embodiment of the present invention, weakly acidic reduced water can be produced quickly and efficiently in one pass.

It is a schematic diagram which shows the whole structure of the manufacturing apparatus of weak acidic reduced water of embodiment of this invention. It is a circuit diagram which shows concretely the structure of the electrical system part in FIG. It is a perspective view which shows an example of the shape of the 1st and 2nd electrolytic vessel shown in FIG. It is an AA arrow directional cross-sectional view in FIG. It is a perspective view which shows the example of the other shape of the 1st and 2nd electrolytic vessel shown in FIG. FIG. 6 is a cross-sectional view taken along line B-B in FIG. 5. It is a schematic diagram which shows the whole structure of the manufacturing apparatus of weak acidic reduced water of other embodiment of this invention. FIG. 8 is a circuit diagram specifically showing the configuration of the electric system section in FIG. 7 when the water flow direction is reversed from the case of FIG. 2. It is a circuit diagram which shows concretely the structure of the electrical system part of the manufacturing apparatus of weak acidic reduced water provided with the pH sensor of other this Embodiment of this invention. It is a circuit diagram which shows concretely the structure of the electrical system part of the manufacturing apparatus of weak acidic reduced water provided with the conductivity sensor of other this Embodiment of this invention. It is a circuit diagram which shows concretely the structure of the electrical system part of the manufacturing apparatus of weak acidic reduced water provided with the heating apparatus of other this Embodiment of this invention.

[Embodiment 1]
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing an overall configuration of a weakly acidic reduced water production apparatus according to an embodiment of the present invention. FIG. 2 is a circuit diagram specifically showing the configuration of the electrical system section in FIG.

  The apparatus for producing weakly acidic reduced water according to the present embodiment produces weakly acidic reduced water as functional water, and is hereinafter simply referred to as a functional water producing apparatus.

(Overall configuration of functional water production device 1)
As shown in FIG. 1, the functional water production apparatus 1 includes a first electrolytic tank 11 and a second electrolytic tank 12, a water supply pump 14, and a water supply tank 15 connected in series.

  The water supply tank 15 is connected to the first water inlet 11 a of the first electrolytic cell 11 through the first water tank 16. The water supply pump 14 is provided in the first water tank 16. The water to be treated (raw water) is supplied to the water supply tank 15 from a water supply source, for example, a water supply.

  The second water inlet 11b of the first electrolytic cell 11 and the first water inlet 12a of the second electrolytic cell 12 are connected to each other, and the second water tank 17 is connected to the second water inlet 12b of the second electrolytic cell 12. Has been. The second water trough 17 is a conduit for supplying weakly acidic reduced water produced by the functional water production apparatus 1 to, for example, a bath that is a water supply target from the functional water production apparatus 1.

  The first electrolytic cell 11 includes a metal electrode 11c and an ion adsorption electrode 11d inside. The metal electrode 11c and the ion adsorption electrode 11d are arranged in parallel with each other and in parallel with the flow direction of the water flowing through the first electrolytic cell 11. Similarly, the second electrolytic cell 12 includes a metal electrode 12c and an ion adsorption electrode 12d inside. The arrangement state of the metal electrode 12c and the ion adsorption electrode 12d inside the second electrolytic cell 12 is the same as the arrangement state of the metal electrode 11c and the ion adsorption electrode 11d inside the first electrolytic cell 11.

  The metal electrodes 11c and 12c are, for example, platinum-coated titanium electrodes having an electrode size of 90 × 70 mm. The ion adsorption electrodes 11d and 12d have a conventionally well-known configuration, and are formed of, for example, activated carbon as a base and a binder material, a conductive material, or the like. The dimensions of the electrode surfaces of the ion adsorption electrodes 11d and 12d facing the metal electrodes 11c and 12c are, for example, the same dimensions as the electrode surfaces of the metal electrodes 11c and 12c. The interelectrode distance between the metal electrodes 11c and 12c and the ion adsorption electrodes 11d and 12d is 10 mm.

(Electrical system)
The functional water production apparatus 1 includes a first power supply circuit (power supply unit) 31, a second power supply circuit (power supply unit) 32, a first switching circuit (power supply unit) 33, and a second switching circuit (power supply unit) as an electrical system unit. 34 and a control device 35.

  The first power supply circuit 31 supplies power to the metal electrode 11c and the ion adsorption electrode 11d via the first switching circuit 33. The first switching circuit 33 switches the polarity of electric power supplied from the first power supply circuit 31 to the metal electrode 11c and the ion adsorption electrode 11d. Similarly, the second power supply circuit 32 supplies power to the metal electrode 12c and the ion adsorption electrode 12d via the second switching circuit 34. The second switching circuit 34 switches the polarity of power supplied from the second power supply circuit 32 to the metal electrode 12c and the ion adsorption electrode 12d.

  The control device 35 includes, for example, a microcomputer, and controls the polarity switching operation of the first switching circuit 33 and the second switching circuit 34. In the functional water production apparatus 1 shown in FIG. 2, the metal electrode 11c of the first electrolytic cell 11 is positive, the ion adsorption electrode 11d is negative, and the metal electrode 12c of the second electrolytic cell 12 is negative, ion The adsorption electrode 12d has a positive polarity.

  In addition, the functional water manufacturing apparatus 1 shown in FIG. 1 has a configuration in which power supply circuits (first and second power supply circuits 31 and 32) are individually provided for the first electrolytic cell 11 and the second electrolytic cell 12. It is. However, the functional water manufacturing apparatus 1 may have a configuration in which one common power supply circuit is provided for the first electrolytic cell 11 and the second electrolytic cell 12.

(Operation of functional water production apparatus 1)
In the above configuration, the operation of the functional water production apparatus 1 will be described below.
In the functional water production apparatus 1, raw water is electrolyzed in the first electrolytic cell 11 with the metal electrode 11c as an anode (positive polarity) and the ion adsorption electrode 11d as a cathode (negative polarity). In the second electrolytic cell 12, the raw water is electrolyzed using the ion adsorption electrode 12d as an anode and the metal electrode 12c as a cathode.

  In the electrolysis of raw water in the first and second electrolytic cells 11, 12, first, raw water is supplied into the first and second electrolytic cells 11, 12. Ordinary tap water can be used as raw water to be used. Specifically, for example, tap water (pH = 7.6, hardness 45 mg / L) from Yao City, Osaka Prefecture can be used.

  In the first electrolytic cell 11 in the previous stage, electrolysis and ion adsorption of raw water are performed. For example, a current value applied to the metal electrode 11c and the ion adsorption electrode 12d (current value flowing between the metal electrode 11c and the ion adsorption electrode 12d): 500 mA, a voltage value (between the metal electrode 11c and the ion adsorption electrode 12d) Voltage value): 35 to 45 V, water flow rate: 30 to 50 ml / min, weak acidic water having a pH of about 3 to 3.5 can be generated in one pass.

In this case, in the first electrolytic cell 11, the following formula (1)
H ₂ O → 1 / 2O ₂ ↑ + 2H ⁺ + 2e ⁻ (1)
As shown in FIG. 5, hydrogen ions (H ⁺ ) are generated from the metal electrode 11c as the anode, and oxygen gas is mainly generated.

In this case, in the ion adsorption electrode 11d as a cathode, the following formula (2)
M 2 ⁺ + 2e ⁻ → M (2)
As shown in FIG. 5, hardness ion components (M 2 ⁺ ) such as Mg ions and Ca ions dissolved in the raw water are effectively adsorbed as electric double layer ions by the adsorption surface of the ion adsorption electrode 11d.

Even in the cathode, water electrolysis according to the following formula (4) partially occurs. However, when the ion adsorbing electrode 11d is used as the cathode, the OH ⁻ ion concentration is lower than when the metal electrode is used as the cathode. The occurrence is limited. Accordingly, in the first electrolytic cell 11, the H ⁺ ions generated in the anode metal electrode 11c increase, so that water is softened by adsorbing and removing hardness ion components such as Mg ions and Ca ions, The pH drops to about pH 3 to 3.5.

  Next, in the second electrolytic cell 12, the state in which the polarity of the metal electrode 12c and the polarity of the ion adsorption electrode 12d are reversed with respect to the water electrolyzed in the first electrolytic cell 11 (the metal electrode 12c is a cathode) Electrolysis is performed using the ion adsorption electrode 12d as an anode. In this case, the power value (current value × voltage value) applied to the second electrolytic cell 12 (the metal electrode 12c and the ion adsorption electrode 12d of the second electrolytic cell 12) is the first electrolytic cell 11 (the first electrolytic cell 11). The power value to be applied to the metal electrode 11c and the ion adsorption electrode 11d) is set to a value smaller than the value.

In the electrolysis in the second electrolytic cell 12, hardness components (M) such as Mg and Ca adsorbed on the ion adsorption electrode 12d are expressed by the following formula (3).
^{M → M 2+ + 2e - ......} (3)
As shown in Fig. 2, it can be separated into water. The hardness component (M) such as Mg and Ca adsorbed on the ion adsorption electrode 12d is, for example, the ion adsorption electrode 12d by the operation of the functional water production apparatus using the metal electrode 12c as an anode and the ion adsorption electrode 12d as a cathode. It was adsorbed on the surface.

On the other hand, in the ion adsorption electrode 12d which is an anode, the following formula (4)
2H ₂ O + 2e ⁻ → H ₂ ↑ + 2OH ⁻ (4)
As shown in FIG. 4, hydroxide ions (OH ⁻ ) are generated and hydrogen gas is generated.

  Here, the reason why the power value applied to the second electrolytic cell 12 is set to a value smaller than the power value applied to the first electrolytic cell 11 will be described.

  When the ratio of the first electrolytic cell / second electrolytic cell of the electric power value is 1.0 or less, the ion desorption in the second electrolytic cell 12 becomes excessive, the pH returns too much from neutral to alkaline, and the desired value is obtained. It becomes difficult to obtain weakly acidic reduced water. Further, since the current is applied to the ion adsorption electrode 12d even after the completion of ion desorption, the ion adsorption electrode 12d is anodized and deteriorates (specifically, activated carbon or the like is oxidized and the adsorption capacity is reduced). Therefore, the power value ratio of the first electrolytic cell / second electrolytic cell is larger than 1.0, that is, the power value applied to the second electrolytic cell 12 is smaller than the power value applied to the first electrolytic cell 11. By setting the value, this situation is prevented.

  In the present embodiment, the power value supplied from the first and second power supply circuits 31 and 32 to the first and second electrolytic cells 11 and 12 is changed by changing the current value while keeping the voltage value constant. I am letting. Therefore, the first and second power supply circuits 31 and 32 have at least a constant voltage value to be output and can change an output current value. The first and second power supply circuits 31 and 32 may be ones that can change the output voltage value.

  Moreover, it is more preferable that the ratio of the first electrolytic cell / second electrolytic cell of the power value is between 1.3 and 2.5. If the ratio of the first electrolytic cell / second electrolytic cell of the power value is such a ratio, it is possible to reliably prevent the situation where the pH of the water treated in the second electrolytic cell 12 returns too much to the neutral side, A situation in which the ion adsorption electrode 12d is deteriorated due to anodic oxidation can be reliably suppressed.

  In addition, when the ratio of the first electrolytic cell / second electrolytic cell of the power value is larger than 2.5, the power value applied to the second electrolytic cell 12 for detachment of ions is not sufficient, so that the ion component is It remains on the ion adsorption electrode 12d. For this reason, repetitive use of the ion adsorption electrode 12d depletes the adsorption capacity of the ion component in the ion adsorption electrode 12d. Therefore, in the second electrolytic cell 12, the hardness ion component cannot be adsorbed by the ion adsorption electrode 12d, and the pH of water does not change. Therefore, if the ratio of the first electrolytic cell / second electrolytic cell of the power value is between 1.3 and 2.5, it becomes easy to maintain the adsorption capability of the ion component in the ion adsorption electrode 12d.

  Moreover, the suitable ratio of the 1st electrolytic cell / 2nd electrolytic cell of an electric power value has a regional difference by the difference in the component of the water used as raw | natural water. The ratio of the first electrolytic cell / second electrolytic cell of the electric power value is preferably about 1.7 to 2 because the carbonate buffer is large in a hard water region having a hardness of 150 ppm or more. Moreover, in the soft water area | region whose hardness is 50 ppm or less, about 1.3-1.5 is suitable.

  Therefore, the ratio of the first electrolytic cell / second electrolytic cell of the electric power value is set to an optimum value by measuring the pH of the raw water to be treated and the oxidation-reduction potential based on the standard hydrogen electrode (hereinafter referred to as ORP). It is preferable to adjust.

  As described above, in the functional water production apparatus 1, weakly acidic water is generated by performing electrolysis and ion adsorption on the raw water in the first electrolytic tank 11 in the previous stage. Further, in the second electrolytic cell 12 in the subsequent stage, the hardness ion component is separated from the ion adsorption electrode 12d, and electrolysis is performed on the metal electrode 12c to generate hydrogen gas and hydroxide ions, thereby generating the first electrolysis. Hydrogen acid is dissolved in the acidic soft water generated in the tank 11 to generate weakly acidic reduced water.

  As a result, the functional water production apparatus 1 can produce weakly acidic reduced water in one pass, which has been difficult in the past. Moreover, since weak acidic reduced water can be manufactured by one pass, weak acidic reduced water can be manufactured at a comparatively high speed. Therefore, the functional water production apparatus 1 can efficiently produce weakly acidic reduced water.

  In addition, in the functional water manufacturing apparatus 1, when the adsorption function of the hardness ion component in the ion adsorption electrode 11d of the 1st electrolytic vessel 11 is exhausted, it becomes impossible to lower water pH to desired pH. For example, in the electrolysis in the first electrolytic cell 11, when water is passed through the first electrolytic cell 11 at a rate of 50 ml / min, the water coming out of the first electrolytic cell 11 is continuously passed through for about 80 minutes. The pH increases and at the same time proton conduction decreases.

  In such a case, the polarity of the electrode of the first electrolytic cell 11 and the polarity of the electrode of the second electrolytic cell 12 are functioned while the raw water is passed from the first electrolytic cell 11 to the second electrolytic cell 12. The polarity is opposite to that in the normal operation of the water production apparatus 1. Thereby, the ion component (hardness ions) adsorbed on the ion adsorbing electrode 11d and the ion component adsorbed on the ion adsorbing electrode 12d (negative ions such as chloride ions and silica ions) can be separated and removed. .

(Shapes of the first and second electrolytic cells 11, 12)
FIG. 3 is a perspective view showing an example of the shape of the first and second electrolytic cells 11 and 12. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a perspective view showing an example of another shape of the first and second electrolytic cells 11 and 12. 6 is a cross-sectional view taken along line BB in FIG.

  As shown in FIGS. 3 and 4, the first and second electrolytic cells 11, 12 have, for example, a box shape with a low height, and, for example, a metal electrode 11 c is disposed on the upper surface of the bottom wall inside the box shape. For example, the ion adsorption electrode 11d may be arranged on the lower surface of the upper wall.

  Further, as shown in FIGS. 5 and 6, the first and second electrolytic cells 11, 12 have, for example, a cylindrical shape, and a round bar-shaped, for example, metal electrode 11 c is disposed at the center of the cylindrical shape, and the cylindrical shape For example, an ion adsorption electrode 11d may be arranged on the inner peripheral surface. However, the shapes of the first and second electrolytic cells 11 and 12 are not limited to these shapes.

[Embodiment 2]
Another embodiment of the present invention will be described below with reference to the drawings. FIG. 7 is a schematic diagram showing the overall configuration of the functional water production apparatus 2 according to the embodiment of the present invention for producing weakly acidic reduced water. FIG. 8 is a circuit diagram specifically illustrating the configuration of the electric system unit in FIG. 7 when the water flow direction is reversed from that in FIG. 2.

(Overall configuration of functional water production device 2)
As shown in FIG. 7, the functional water production apparatus 2 includes the first electrolytic tank 11 and the second electrolytic tank 12 connected in series, a water channel switching device (water flow direction switching unit) 13, the water supply pump 14, and The water supply tank 15 is provided.

  The water channel switching device 13 is connected to the water supply tank 15 through a third water trough 18. The water supply pump 14 is provided in the third water tank 18.

  Further, the water channel switching device 13 is connected to the first water inlet 11 a of the first electrolytic tank 11 through the first water tank 16, and the second channel of the second electrolytic tank 12 through the second water tank 17. It is connected to the water inlet 12b. A fourth waterway 19 is further connected to the water channel switching device 13. The fourth water trough 19 is a conduit for supplying weakly acidic reduced water produced by the functional water production apparatus 2 to, for example, a bath that is a water supply target from the functional water production apparatus 2.

  The water channel switching device 13 can switch the connection between the third water trough 18, the first water trough 16, and the second water trough 17. The water flow direction switching operation of the water channel switching device 13 is controlled by the control device 35. Other configurations are the same as those of the functional water production apparatus 1.

  When the connection of the third water trough 18 is switched to the first water trough 16 by the water channel switching device 13, the water supplied from the water supply tank 15 is the third water trough 18, the first water trough 16, Water is supplied from the fourth water tank 19 to the water supply destination through the first electrolytic tank 11, the second electrolytic tank 12, and the second water tank 17 (flow of water shown by a solid line in FIG. 7). On the other hand, when the connection of the third water tank 18 is switched to the second water tank 17 by the water channel switching device 13, the water supplied from the water supply tank 15 is the third water tank 18 and the second water tank. 17, the second electrolytic cell 12, the first electrolytic cell 11, and the first water tank 16, and the water is supplied from the fourth water tank 19 to the water supply destination (the flow of water indicated by a two-dot chain line in FIG. 7). .

(Operation of functional water production apparatus 2)
In the above configuration, the operation of the functional water production apparatus 2 will be described below.
In the functional water production device 2, when producing weakly acidic reduced water, the connection of the third water trough 18 is first switched to the first water trough 16 by the water channel switching device 13. The connection of the third water trough 18 may be switched to the second water trough 17 first.

  When the connection of the third water trough 18 is switched to the first water trough 16, the water supplied from the water tank 15 is the third water trough 18, the first water trough 18, as shown by the solid line in FIG. Water is supplied from the fourth water tank 19 to the water supply destination through the water tank 16, the first electrolytic tank 11, the second electrolytic tank 12, and the second water tank 17.

  In this case, similarly to the case of the functional water production apparatus 1, in the first electrolytic cell 11, water is electrolyzed using the metal electrode 11c as an anode and the ion adsorption electrode 11d as a cathode. In the second electrolytic cell 12, electrolysis of water is performed using the ion adsorption electrode 12d as an anode and the metal electrode 12c as a cathode. Thereby, in the functional water manufacturing apparatus 2, weak acidic reduced water can be manufactured by one pass and comparatively high speed. That is, weakly acidic reduced water can be produced efficiently.

  On the other hand, if ion adsorption is continuously performed by the ion adsorption electrode 11d of the cathode in the first electrolytic cell 11, the adsorption capacity of the hardness ion component in the ion adsorption electrode 11d is depleted, and the pH of water is set to a desired pH. Can not be lowered.

  In this case, in the ion adsorption electrode 11d, the generation of hydroxide ions shown in the above-described formula (4) starts, and the pH of the water coming out of the first electrolytic cell 11 increases and simultaneously the proton conduction decreases. Therefore, the conductivity is reduced. As described above, this phenomenon is caused by continuous water flow for about 80 minutes, for example.

  Therefore, the control device 35 controls the water channel switching device 13 to switch the water flow direction to the first and second electrolyzers 11 and 12 in the reverse direction (water flow direction switching operation), and the first and second switching. The circuits 33 and 34 are controlled to switch the polarity of the power applied to the metal electrodes 11c and 12c and the ion adsorption electrodes 11d and 12d of the first and second electrolytic cells 11 and 12 in reverse (polarity switching operation). ). Hereinafter, this operation is referred to as a pre-stage / post-stage switching operation of the first and second electrolytic cells 11, 12.

  Specifically, as shown by a two-dot chain line in FIG. 7, the connection of the third water trough 18 is switched to the second water trough 17 by the water channel switching device 13, and the water supplied from the water supply tank 15 is Water is supplied from the fourth water tank 19 to the water supply destination through the third water tank 18, the second water tank 17, the second electrolytic tank 12, the first electrolytic tank 11, and the first water tank 16. Further, as shown in FIG. 8, the metal electrode 11c of the first electrolytic cell 11 is negative, the ion adsorption electrode 11d is positive, the metal electrode 12c of the second electrolytic cell 12 is positive, and the ion adsorption electrode 12d is negative. It becomes sex.

  As described above, when the switching by the water channel switching device 13 and the switching by the first and second switching circuits 33 and 34 are performed, the relationship between the first and second stages of the first and second electrolytic cells 11 and 12 is reversed, The second electrolytic cell 12 is the front stage, and the first electrolytic cell 11 is the rear stage.

  Therefore, the ion adsorption electrode 12d of the second electrolytic cell 12 adsorbs the hardness ion component, and the ion adsorption electrode 11d of the first electrolytic cell 11 separates the hardness ion component. Thereby, in the second electrolytic cell 12, the adsorption capacity of the hardness ion component in the ion adsorption electrode 12d is reduced, but in the first electrolytic cell 11, the adsorption capacity of the hardness ion component in the ion adsorption electrode 11d is restored.

  Therefore, the functional water production apparatus 2 can continuously produce weakly acidic reduced water by performing the first-stage and second-stage switching operations of the first and second electrolyzers 11 and 12.

  In the present embodiment, the control device 35 performs the front / rear switching operation of the first and second electrolyzers 11 and 12 based on the water passage time or the water passage amount. That is, the treatment amount of water per hour in the first and second electrolytic cells 11 and 12 can be known in advance, and the adsorption capacity of the hardness ion component in the ion adsorption electrodes 11d and 12d when the cathode is used is depleted. The amount of water treated, i.e., the water flow time, can be predicted. Therefore, the control device 35 can perform the upstream and downstream switching operations of the first and second electrolytic cells 11 and 12 based on the water passing time or the water passing amount.

  The control device 35 can measure the water passage time with an internal timer. In addition, the amount of water flow can be obtained from a water meter provided in any ridge through which water passes, a change in the water level of the water supply tank 15, or the like.

[Embodiment 3]
Still another embodiment of the present invention will be described below with reference to the drawings. FIG. 9 is a circuit diagram specifically showing the configuration of the electrical system section of the functional water production apparatus 2 of the present embodiment.

  As described above, in the functional water production apparatus 2, when the adsorption capacity of the hardness ion component in the ion adsorption electrode 11d of the first electrolytic cell 11 is depleted, generation of hydroxide ions starts in the ion adsorption electrode 11d, and the first The pH of the water coming out of the electrolytic cell 11 increases.

  Therefore, the functional water production apparatus 2 according to the present embodiment performs the upstream and downstream switching operation of the first and second electrolytic cells 11 and 12 based on the pH of the water treated in the first electrolytic cell 11. It has become.

  As shown in FIG. 9, in the functional water production apparatus 2, a pH sensor 41 is provided in a water passage between the first electrolytic tank 11 and the second electrolytic tank 12. The pH value of the water detected by the pH sensor 41 is input to the control device 35 via the pH detection circuit 42. The pH detection circuit 42 includes a voltage amplification circuit and a logic circuit, and converts the detection signal indicating the pH value output from the pH sensor 41 into a signal that can be processed by the control device 35.

  The control device 35 monitors the pH value of water (water treated in the first electrolytic cell 11) detected by the pH sensor 41 and input through the pH detection circuit 42, and the pH value increases. In addition, the first-stage and second-stage electrolytic tanks 11 and 12 are switched between the first and second stages.

  As described above, according to the configuration of the present embodiment, weakly acidic reduced water can be produced in one pass and at a relatively high speed. That is, weakly acidic reduced water can be produced efficiently. In addition, when the pH value of the water increases, the weakly acidic reduced water can be continuously produced by performing the first-stage and second-stage switching operations of the first and second electrolyzers 11 and 12. Furthermore, the first-stage / second-stage switching operation of the first and second electrolytic cells 11, 12 can be performed at an appropriate timing.

[Embodiment 4]
Still another embodiment of the present invention will be described below with reference to the drawings. FIG. 10 is a circuit diagram specifically showing the configuration of the electrical system section of the functional water production apparatus 2 of the present embodiment.

  As described above, in the functional water production apparatus 2, when the adsorption capacity of the hardness ion component in the ion adsorption electrode 11d of the first electrolytic cell 11 is depleted, the water treated in the first electrolytic cell 11 has proton conduction. The conductivity decreases because of a decrease.

  Therefore, the functional water production apparatus 2 according to the present embodiment performs the upstream and downstream switching operation of the first and second electrolytic cells 11 and 12 based on the conductivity of the water treated in the first electrolytic cell 11. It has become.

  As shown in FIG. 10, in the functional water production apparatus 2, a conductivity sensor 45 is provided in a water passage between the first electrolytic tank 11 and the second electrolytic tank 12. The conductivity of water detected by the conductivity sensor 45 is input to the control device 35 via the conductivity detection circuit 46. The conductivity detection circuit 46 includes a voltage amplification circuit and a logic circuit, and converts the detection signal indicating the conductivity output from the conductivity sensor 45 into a signal that can be processed by the control device 35.

  The control device 35 monitors the conductivity of water (water treated in the first electrolytic cell 11) detected by the conductivity sensor 45 and input via the conductivity detection circuit 46, and the conductivity decreases. In this case, the first-stage and second-stage electrolytic tanks 11 and 12 are switched between the first and second stages.

  As described above, according to the configuration of the present embodiment, weakly acidic reduced water can be produced in one pass and at a relatively high speed. That is, weakly acidic reduced water can be produced efficiently. Further, when the conductivity of water decreases, the weakly acidic reduced water can be continuously produced by performing the first-stage / second-stage switching operation of the first and second electrolyzers 11, 12. Furthermore, the first-stage / second-stage switching operation of the first and second electrolytic cells 11, 12 can be performed at an appropriate timing.

  In addition, when the voltage applied to the metal electrode and the ion adsorption electrode of the electrolytic cell in the previous stage is constant, the conductivity of the water is replaced with the configuration obtained by the conductivity sensor 45, and the metal electrode and the ion adsorption electrode are replaced with each other. You may make it obtain | require based on the electric current value between.

[Embodiment 5]
Still another embodiment of the present invention will be described below with reference to the drawings. FIG. 11 is a circuit diagram specifically showing the configuration of the electrical system unit of the functional water production apparatus provided with the heating device of the present embodiment.

  The functional water production apparatus 2 according to the present embodiment performs a first-stage / second-stage switching operation of the first and second electrolyzers 11, 12, and the first electrolyzer 11 or the second electrolyzer 12 serving as the former-stage electrolyzer. The water treated with can be heated. For this reason, the functional water manufacturing apparatus 2 of this Embodiment is provided with the heating apparatus 51 between the 1st electrolytic vessel 11 and the 2nd electrolytic vessel 12, as shown in FIG. The heating device 51 is a conventionally well-known device such as a heater provided in a water passage.

  Moreover, in the functional water manufacturing apparatus 2, since water is heated with the heating apparatus 51, adsorption | suction of a hardness ion component is carried out about the ion adsorption electrodes 11d and 12d of the 1st electrolytic cell 11 used as the former electrolytic cell, or the 2nd electrolytic cell 12. As a sensor for detecting that the remaining power is depleted, it is preferable to use a conductivity sensor rather than a pH sensor. Therefore, the functional water production apparatus 2 uses a conductivity sensor.

  In addition, when the first and second electrolyzers 11 and 12 are switched to the first and second stages, in order to eliminate the influence of heating on the conductivity of water, that is, the conductivity of water before heating can be measured. The conductivity sensors (first conductivity sensor 52 and second conductivity sensor 53) are provided at positions on both sides of the heating device 51 in the water passage.

  Here, conventionally, as a method for producing heated weakly acidic reduced water used for bathing or the like, since hydrogen gas generated during electrolysis is flammable and dangerous, raw water is heated in advance. It was customary to electrolyze the raw water to produce weakly acidic reduced water.

  However, in such a method, since the heated raw water is passed through the electrolytic cell, thermal energy is easily dissipated from the raw water. For this reason, there has been a problem that the temperature of the weakly acidic reduced water is greatly reduced at the stage of use.

  On the other hand, in the functional water production apparatus 2 of the present embodiment, since the raw water is heated after electrolyzing raw water in, for example, the first electrolytic cell 11 which is at least the preceding electrolytic cell, the processed water is heated. It is possible to suppress the temperature reduction of the acidic reduced water.

  In this case, for example, in the treatment by the first electrolytic cell 11 serving as the previous electrolytic cell, the generated gas is oxygen gas having no self-combustibility, so that the water can be heated safely. That is, in the functional water production apparatus 2 of the present embodiment, for example, the first electrolytic cell 11 at the front stage where non-flammable oxygen gas is generated and the second electrolytic tank 12 at the subsequent stage where self-combustible hydrogen gas is generated. Since water is heated in between, water can be safely heated by eliminating the danger of ignition.

  Moreover, since the acidic water produced | generated in the 1st electrolytic vessel 11 of the front | former stage has high ion conductivity by a proton, the heat conductivity at the time of the heating by the heating apparatus 51 becomes high. Therefore, water can be efficiently heated by the heating device 51.

  As described above, according to the configuration of the present embodiment, weakly acidic reduced water can be produced in one pass and at a relatively high speed. That is, weakly acidic reduced water can be produced efficiently. In addition, when the conductivity is lowered, by performing the first-stage / second-stage switching operation of the first and second electrolytic cells 11, 12, it is possible to continuously produce weakly acidic reduced water. Furthermore, the first-stage / second-stage switching operation of the first and second electrolytic cells 11, 12 can be performed at an appropriate timing. Furthermore, weakly acidic reduced water can be safely heated while suppressing a temperature drop.

  In the above embodiment, when weakly acidic reduced water is used for applications such as a mist sauna, two platinum-coated titanium electrodes and two activated carbon electrodes with an electrode size of 150 × 100 mm are alternately arranged at intervals of 5 mm. By placing and applying DC3.5A (voltage: 40-60V) to these electrodes and passing water at a speed of 30-50 ml / min, the pH is 4-5, and the ORP is a weak value of about -200--50 mV. Acidic reduced water can be produced. The water flow rate can be increased by a factor of 2 or more by previously removing buffer components (such as bicarbonate ions) in the raw water with an anion exchange resin.

  It is desirable that the weakly acidic reduced water produced by the functional water production apparatuses 1 and 2 described above is used for beauty and cosmetic applications such as face washing and bathing. Water with a large amount of dissolved hydrogen and a low oxidation-reduction potential (ORP) of about 0 to -500 mV is called so-called reduced water, and it is expected to have an anti-aging effect on the skin, especially for cosmetic use. (Reference: Hot Spring Science, Vol. 55, p. 55-63, 2005). Furthermore, it is known that weakly acidic water has a high affinity for skin pH of 4 to 5.5 and exhibits a skin tightening effect called a so-called astringent effect.

  Therefore, the functional water production apparatuses 1 and 2 of the present embodiment can produce good weakly acidic reduced water that has a particularly high affinity for the skin, and can also ensure safety during heating. Is preferred.

[Summary]
The apparatus for producing weakly acidic reduced water according to aspect 1 of the present invention includes a first electrolytic cell 11 having a metal electrode 11c and an ion adsorption electrode 11d therein, a metal electrode 12c and an ion adsorption electrode 12d therein, The second electrolytic cell 12 connected in series to the first electrolytic cell 11, and the previous electrolytic cell located upstream of the flow of water among the first electrolytic cell 11 and the second electrolytic cell 12 The electric power that the metal electrode has a positive polarity, the ion adsorption electrode has a negative polarity, the metal electrode of the latter-stage electrolytic cell located on the downstream side of the water flow has a negative polarity, and the ion adsorption electrode has a positive polarity. A power supply unit (a first power supply circuit 31, a second power supply circuit 32, a first switching circuit 33, and a second switching circuit 34) that supplies the electrodes is provided.

  According to said structure, when manufacturing weakly acidic reduced water, water is poured from a front | former stage electrolytic cell to a back | latter stage electrolytic cell, and a power supply part is operated. In the former-stage electrolytic cell, oxygen gas is generated from the metal electrode as the anode, and this oxygen gas is dissolved in water. Further, hardness ion components in water are adsorbed by an ion adsorption electrode which is a cathode. Thereby, acidic soft water is obtained in the former stage electrolytic cell.

  In the latter-stage electrolytic cell, hydrogen gas is generated from the ion-adsorbing electrode as the anode, and this hydrogen gas dissolves in the acidic soft water flowing from the previous-stage electrolytic cell and becomes weakly acidic reduced water.

  Thereby, weakly acidic reduced water can be manufactured quickly and efficiently in one pass.

  The apparatus for producing weakly acidic reduced water according to aspect 2 of the present invention is the power source unit (first power circuit 31, second power circuit 32, first switching circuit 33, second switching circuit 34) in the above aspect 1. The power value applied to the metal electrode and the ion adsorption electrode of the latter electrolytic cell may be configured to be smaller than the power value applied to the metal electrode and the ion adsorption electrode of the previous electrolytic cell.

  According to the above configuration, when the ion adsorption electrode of the latter electrolytic cell has adsorbed the hardness ion component in water in the previous treatment, the positive ion power is supplied to cause the separation of the hardness ion component. . In this case, if the hardness ion component is excessively removed, the pH of the water returns too much to the neutral side. Therefore, if the power value applied to the metal electrode and the ion adsorption electrode of the latter-stage electrolytic cell is made smaller than the power value applied to the metal electrode and the ion-adsorption electrode of the former-stage electrolytic cell, such a situation can be prevented and a good weakness can be achieved. Acidic reduced water can be obtained.

  The apparatus for producing weakly acidic reduced water according to aspect 3 of the present invention includes the water flow direction switching unit (water channel switching device 13) and the control unit (control device 35) in the above aspect 1 or 2, and the power source The units (first power circuit 31, second power circuit 32, first switching circuit 33, second switching circuit 34) are the metal electrode 11c and the ion adsorption electrode 11d of the first electrolytic cell 11, and the second A polarity switching operation for switching the polarity of electric power applied to the metal electrode 12c and the ion adsorption electrode 12d of the electrolytic cell 12 to opposite polarities is possible. The water flow direction switching unit (water channel switching device 13) is The first electrolytic cell 11 is the first electrolytic cell, the second electrolytic cell 12 is the second electrolytic cell, the first water flow direction, the second electrolytic cell 12 is the first electrolytic cell, and the first electrolytic cell is the first electrolytic cell. 11 performs the water flow direction switching operation with the second water flow direction of water using the latter-stage electrolytic cell, and the control unit (control device 35) performs the first water flow direction or the second water flow direction according to the first water flow direction. After the water treatment by the first electrolytic cell 11 and the second electrolytic cell 12 is performed, the power supply unit and the water flow direction switching unit are controlled so that the polarity switching operation and the water flow direction switching operation are performed. It is good also as composition to do.

  According to said structure, by the water flow direction switching operation | movement of a water flow direction switching part, for example, according to the 1st water flow direction which uses a 1st electrolytic cell as a front | former stage electrolytic cell, and uses a 2nd electrolytic cell as a back | latter stage electrolytic cell. After the water treatment is performed, the water is treated in the second water flow direction using the second electrolytic cell as the former electrolytic cell and the first electrolytic cell as the latter electrolytic cell. At this time, the polarity of the electric power applied to the metal electrode and ion adsorption electrode of the first electrolytic cell and the metal electrode and ion adsorption electrode of the second electrolytic cell is switched to the opposite polarity by the polarity switching operation of the power supply unit.

  Thereby, in the manufacturing apparatus of weak acidic reduced water, manufacture of weak acidic reduced water is attained continuously. That is, for example, in the treatment of water in the first water flow direction using the first electrolytic cell as the former electrolytic cell and the second electrolytic cell as the latter electrolytic cell, the ion adsorption electrode of the cathode in the first electrolytic cell Adsorption of hardness ion component. If this operation is continued, the adsorption capacity of the hardness ion component in the ion adsorption electrode is exhausted, and the pH of water cannot be lowered to a desired pH. Therefore, the water flow direction is switched to the second water flow direction of water with the second electrolytic cell as the previous electrolytic cell and the first electrolytic cell as the subsequent electrolytic cell, and the metal electrode and the ion adsorption electrode of the first electrolytic cell Then, the polarity of the power applied to the metal electrode and the ion adsorption electrode of the second electrolytic cell is switched to the opposite polarity. Thereby, the separation of the hardness ion component is performed in the ion adsorption electrode of the first electrolytic cell. Therefore, the residual capacity of the hardness ion component in the ion adsorption electrode of the first electrolytic cell is restored, and it is possible to continuously produce weakly acidic reduced water.

  The apparatus for producing weakly acidic reduced water according to aspect 4 of the present invention includes the pH sensor 41 between the first electrolytic tank 11 and the second electrolytic tank 12 in the above aspect 3, and includes the control unit (control). When the pH of water detected by the pH sensor 41 rises, the device 35) is configured to perform the polarity switching operation and the water flow direction switching operation so that the power supply unit (first power circuit 31, It is good also as a structure which controls the 2 power supply circuit 32, the 1st switching circuit 33, the 2nd switching circuit 34), and the said water flow direction switching part (water channel switching apparatus 13).

  According to said structure, the polarity switching operation | movement of a power supply part and the water flow direction switching operation | movement of a water flow direction switching part are between a 1st electrolytic cell and a 2nd electrolytic cell (between a front | former stage electrolytic cell and a back | latter stage electrolytic cell. This is performed when the pH of water detected by the pH sensor of () rises. That is, when the adsorption function of the hardness ion component is depleted in the ion adsorption electrode, the pH of water cannot be lowered and rises. Therefore, when the pH of water rises, if the polarity switching operation of the power supply unit and the water flow direction switching operation of the water flow direction switching unit are performed, these switching operations can be performed at appropriate timing.

  The apparatus for producing weakly acidic reduced water according to aspect 5 of the present invention includes the electrical conductivity sensor 45 between the first electrolytic cell 11 and the second electrolytic cell 12 in the above aspect 3, and the control unit ( When the conductivity of water detected by the conductivity sensor 45 is reduced, the control device 35) is configured to perform the polarity switching operation and the water flow direction switching operation so that the power supply unit (first power supply circuit) 31, second power supply circuit 32, first switching circuit 33, second switching circuit 34) and the water flow direction switching unit (water channel switching device 13) may be controlled.

  According to said structure, the polarity switching operation | movement of a power supply part and the water flow direction switching operation | movement of a water flow direction switching part are between a 1st electrolytic cell and a 2nd electrolytic cell (between a front | former stage electrolytic cell and a back | latter stage electrolytic cell. This is performed when the electrical conductivity of water detected by the electrical conductivity sensor is reduced. That is, when the adsorption function of the hardness ion component is depleted in the ion adsorption electrode, the conductivity of water decreases. Therefore, when the conductivity of water decreases, if the polarity switching operation of the power supply unit and the water flow direction switching operation of the water flow direction switching unit are performed, these switching operations can be performed at an appropriate timing.

  The weakly acidic reduced water production apparatus according to Aspect 6 of the present invention is the one of any one of Aspects 1 to 5, in which water is heated between the first electrolytic tank 11 and the second electrolytic tank 12. It is good also as a structure provided with the heating apparatus 51 to perform.

  According to the above configuration, since the water is heated after the treatment in the preceding electrolytic cell is completed, the temperature decrease of the weakly acidic reduced water produced is suppressed as compared with the configuration in which the water to be treated is preheated. be able to. In addition, since the gas generated in the preceding electrolytic cell is an oxygen gas that is not self-combustible, that is, not a self-combustible hydrogen gas, water can be heated safely. Moreover, since the acidic water produced | generated in the electrolyzer of a front | former stage has high ionic conductivity by a proton, and heat conductivity becomes high, a heating apparatus heats the water after the process in the electrolyzer of a front | former stage efficiently. be able to.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

  INDUSTRIAL APPLICABILITY The present invention can be used for the production of weakly acidic reduced water that is used, for example, for facial washing with bath water or shower.

DESCRIPTION OF SYMBOLS 1 Functional water manufacturing apparatus 2 Functional water manufacturing apparatus 11 1st electrolytic vessel 11a 1st water flow port 11b 2nd water flow port 11c Metal electrode 11d Ion adsorption electrode 12 2nd electrolytic cell 12a 1st water flow port 12b 2nd water flow port 12c Metal electrode 12d ion adsorption electrode 13 water channel switching device (water flow direction switching unit)
DESCRIPTION OF SYMBOLS 14 Water supply pump 15 Water supply tank 16 1st water tank 17 2nd water tank 18 3rd water tank 19 4th water tank 31 1st power supply circuit (power supply part)
32 Second power supply circuit (power supply unit)
33 1st switching circuit (power supply part)
34 Second switching circuit (power supply unit)
35 Control Device 41 pH Sensor 42 pH Detection Circuit 45 Conductivity Sensor 46 Conductivity Detection Circuit 51 Heating Device 52 First Conductivity Sensor 53 Second Conductivity Sensor

Claims (6)

A first electrolytic cell having a metal electrode and an ion adsorption electrode therein;
A second electrolytic cell having a metal electrode and an ion adsorption electrode therein and connected in series to the first electrolytic cell;
Of the first electrolytic cell and the second electrolytic cell, the metal electrode of the previous electrolytic cell located on the upstream side of the water flow has a positive polarity and the ion adsorption electrode has a negative polarity, and the downstream of the water flow. A weakly acidic reduced water, comprising: a power supply unit that supplies power to each of the electrodes so that the metal electrode of the latter-stage electrolytic cell located on the side has a negative polarity and the ion adsorption electrode has a positive polarity manufacturing device.   The power supply unit is configured to make a power value applied to the metal electrode and the ion adsorption electrode of the subsequent electrolytic cell smaller than a power value applied to the metal electrode and the ion adsorption electrode of the front electrolytic cell. The apparatus for producing weakly acidic reduced water according to claim 1. It has a water flow direction switching part and a control part,
The power supply unit is configured to switch the polarity of power applied to the metal electrode and the ion adsorption electrode of the first electrolytic cell and the metal electrode and the ion adsorption electrode of the second electrolytic cell to opposite polarities. Is possible,
The water flow direction switching unit includes a first water flow direction in which the first electrolytic cell is the front electrolytic cell and the second electrolytic cell is the rear electrolytic cell, and the second electrolytic cell is the front electrolytic cell. And a water flow direction switching operation with a second water flow direction of water with the first electrolytic cell as the latter electrolytic cell,
The control unit performs the polarity switching operation and the water flow direction switching after the water treatment by the first electrolytic cell and the second electrolytic cell in the first water flow direction or the second water flow direction is performed. The apparatus for producing weakly acidic reduced water according to claim 1 or 2, wherein the power supply unit and the water flow direction switching unit are controlled so that the operation is performed. A pH sensor is provided between the first electrolytic cell and the second electrolytic cell,
The control unit controls the power supply unit and the water flow direction switching unit so that the polarity switching operation and the water flow direction switching operation are performed when the pH of water detected by the pH sensor increases. The apparatus for producing weakly acidic reduced water according to claim 3. A conductivity sensor is provided between the first electrolytic cell and the second electrolytic cell,
The control unit is configured to perform the polarity switching operation and the water flow direction switching operation when the conductivity of water detected by the conductivity sensor is reduced. The apparatus for producing weakly acidic reduced water according to claim 3, wherein:   The apparatus for producing weakly acidic reduced water according to any one of claims 1 to 5, further comprising a heating device for heating water between the first electrolytic cell and the second electrolytic cell. .

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