JPH11207352A - Production of antibacterial metallic ionic water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always keep the concentration of metallic ions in antibacterial metallic ionic water such as silver ionic water and copper ionic water produced by electrolysis at a set value, regardless of variation of characteristics of raw water. SOLUTION: This method is a production method of the antibacterial metallic ionic water by electrolyzing a raw water in an electrolytic cell 10 with a metallic material eluting antibacterial ions as the anode, and relations of water temperature of the raw water fed to the electrolytic bath 10, the flow rate or the electric conductivity to the concentration of metallic ions are preliminarily calculated, and based on the relations of the detected water temperature, flow rate or electric conductivity to the metallic ion concentration, by controlling the voltage and electric current value impressed on both the anode and a cathode of the electrolytic bath 10, the antibacterial metallic ionic water being always constant in metallic ion concentration is produced, regardless of a variation of the temperature, the flow rate or the electric conductivity of the raw water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing antibacterial metal ion water containing antibacterial metal ions such as silver ion water and copper ions.

[0002]

2. Description of the Related Art Silver ion water, copper ion water and the like have a bactericidal action and are used in various fields as antibacterial metal ion water. In order to generate antibacterial metal ion water, it is common to electrolyze raw water in an electrolytic cell having a metal that elutes antibacterial metal ions as an anode.

[0003]

When antibacterial metal ion water is produced by the above-described electrolysis method, the metal ion concentration in the metal ion water is determined by the voltage and current applied to the anode and cathode of the electrolytic cell. Set based on value.

According to the present inventor, in such an electrolysis method, at least the temperature of the raw water supplied to the electrolytic cell, the flow rate of the raw water supplied to the electrolytic cell, the electrical conductivity of the raw water supplied to the electrolytic cell, and the like. It has been found that one factor affects the metal ion concentration in the metal ion water.

Accordingly, the present invention has been made based on such knowledge, and a main object of the present invention is to provide a method for producing antibacterial metal ion water by an electrolytic method without being affected by the above-mentioned factors. It is to generate metal ion water whose metal ion concentration is always a set value.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a method for producing antibacterial metal ion water, and more particularly, to a method for producing antibacterial metal ion by electrolyzing raw water in an electrolytic cell having a metal that elutes antibacterial metal ions as an anode. A method for generating metal ion water is to be applied.

According to a first aspect of the present invention, in the above-described method for producing antibacterial metal ionized water, the relationship between the water temperature of the raw water supplied to the electrolytic cell and the metal ion concentration is calculated in advance and detected. The voltage / current value applied to the anode and cathode of the electrolytic cell is controlled based on the water temperature and the relationship between the water temperature and the metal ion concentration.

According to a second aspect of the present invention, in the above-mentioned method for producing antibacterial metal ion water, the relationship between the flow rate of raw water supplied to the electrolytic cell and the metal ion concentration is calculated in advance and detected. The voltage / current value applied to the anode and cathode of the electrolytic cell is controlled based on the flow rate and the relationship between the flow rate and the metal ion concentration.

According to a third aspect of the present invention, in the above-described method for producing antibacterial metal ion water, the relationship between the electric conductivity of the raw water supplied to the electrolytic cell and the metal ion concentration is calculated in advance. A voltage / current value applied to the anode and the cathode of the electrolytic cell is controlled based on the detected electrical conductivity and the relationship between the electrical conductivity and the metal ion concentration.

[0010]

According to the first aspect of the present invention, the relationship between the temperature of the raw water supplied to the electrolytic cell and the metal ion concentration is calculated in advance, and the detected water temperature and the relationship between the water temperature and the metal ion concentration are detected. Based on the voltage and current values applied to the anode and cathode of the electrolytic cell, the voltage applied to the anode and cathode corresponding to the water temperature changes even if the water temperature of the raw water fluctuates during electrolysis. The current value can be controlled, and the metal ion concentration in the generated metal ion water can be constantly maintained at a set value.

According to the second aspect of the present invention, the relationship between the flow rate of the raw water supplied to the electrolytic cell and the metal ion concentration is calculated in advance, and the relationship between the detected flow rate and the relationship between the flow rate and the metal ion concentration is calculated. Based on the control of the voltage and current value applied to the anode and the cathode of the electrolytic cell, even if the flow rate of the raw water fluctuates during the electrolysis, the voltage applied to the anode and the cathode corresponding to the flow rate change The current value can be controlled, and the metal ion concentration in the generated metal ion water can be constantly maintained at a set value.

According to the third aspect of the present invention, the relationship between the electric conductivity of the raw water supplied to the electrolytic cell and the metal ion concentration is calculated in advance, and the detected electric conductivity and flow rate-metal ion concentration The voltage and current applied to the anode and cathode of the electrolytic cell are controlled based on the relationship described above, so even if the electrical conductivity of the raw water fluctuates during electrolysis, the anode responds to the variation in electrical conductivity. By controlling the voltage / current value applied to the cathode and the cathode, the metal ion concentration in the generated metal ion water can be constantly maintained at the set value.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Generation Method of the Present Invention) FIG.
Is an electrolysis apparatus for generating silver ion water according to the first generation method of the present invention.
1 and a voltage / current value setting device 22.

The electrolytic cell 10 comprises a cylindrical body 11 sandwiched between a bottom plate 12 and a cover plate 13 in a liquid-tight and air-tight manner.
It is composed of a supply pipe 14 connected to the center of the bottom plate 12 and communicating with the inside of the tank, and an anode 15 fixed to the lower surface side of the lid plate 13 and facing the inside of the tank.

In the electrolytic cell 10, the cylindrical body 11 is formed of a conductive material such as stainless steel, the bottom plate 12 and the cover plate 13 are formed of a non-conductive material such as a synthetic resin, and the anode 15 is formed of silver or silver. It is formed of an alloy or the like.
The positive electrode of the power source 23 is connected to the anode 15, and the negative electrode of the power source 23 is connected to the cylindrical body 11.
Constitute the cathode of the electrolytic cell 10.

In the electrolysis apparatus, a water temperature sensor 21 is interposed in the supply line 14 of the electrolysis tank 10.
A voltage / current value setting device 22 is connected to the power supply 23. The voltage / current value setting device 22 functions to control the applied voltage / current to both electrodes 11 and 15 based on the temperature detection signal from the water temperature sensor 21.

In the electrolysis apparatus, when silver ion water is generated, raw water such as tap water is supplied at a predetermined flow rate through a supply pipe 14 into the tank of the electrolytic cell 10, and the anode 15 and the cathode 15 are supplied from a power source 23. A predetermined value of voltage / current is applied to 11 (cylindrical body 11). Thus, during electrolysis, a predetermined amount of silver flows out of the anode 15 as silver ions into the electrolytic solution, and silver ion water is generated in the tank. The generated silver ion water is collected through an outflow line 16 connected to the cover plate 13.

FIG. 2 is a graph showing the relationship between the water temperature of the raw water and the silver ion concentration in the electrolytic water when the current value applied to the electrodes 11 and 15, the supply flow rate of the raw water and the electric conductivity are kept constant. . The graph shows the silver ion concentration with respect to the water temperature when the applied current value is 5 mA, the supply flow rate of the raw water is 2 l / min, and the electric conductivity is 80 μS / cm. The silver ion concentration gradually decreases as the water temperature of the raw water increases. It indicates that

Therefore, the relationship between the water temperature and the current value when the silver ion concentration in the silver ion water is kept constant is measured in advance, and
If the current value is controlled in accordance with this relationship and the water temperature, the silver ion concentration in the electrolyzed water (silver ion water) can be always kept constant. FIG. 3 is a graph showing the relationship between the water temperature of the raw water and the current value when the silver ion concentration is kept constant at each concentration. The current value applied to both electrodes 11 and 15 is represented by a voltage / current value setting device. 22, the water temperature sensor 21
Is controlled to a current value calculated from the relationship between the water temperature of the raw water and the current value on the basis of the water temperature detection signal from. Thereby, the silver ion concentration in the generated silver ion water can be maintained at a set constant value irrespective of the fluctuation of the raw water temperature.

FIG. 4 shows an electrolytic apparatus for carrying out the second production method of the present invention, except that a flow rate sensor 24 is interposed in a supply line 14 constituting the electrolytic cell 10. 1 has the same configuration as the first electrolysis apparatus. Therefore, in the electrolysis device, the same components as those in the first electrolysis device are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the electrolysis apparatus, a flow rate sensor 24 is interposed in the supply line 14 of the electrolytic cell 10.
A voltage / current value setting device 22 is connected to the power supply 23. The voltage / current value setting device 22 functions to control the applied voltage / current to both electrodes 11 and 15 based on the flow rate detection signal from the flow rate sensor 24. Raw water such as tap water is supplied at a predetermined flow rate into the tank 10 through the supply pipe 14, and a predetermined voltage / current is applied from the power supply 23 to the anode 15 and the cathode 11 (the cylindrical body 11).

Thus, during electrolysis, a predetermined amount of silver flows out of the anode 15 as silver ions into the electrolytic solution, and silver ion water is generated in the tank. The generated silver ion water is supplied to the cover plate 13.
Through an outlet line 16 connected to

FIG. 5 is a graph showing the relationship between the flow rate of the raw water and the silver ion concentration in the electrolytic water when the current value applied to both electrodes 11 and 15, the water temperature of the raw water and the electric conductivity are kept constant. The graph shows the silver ion concentration with respect to the flow rate when the applied current value is 30 mA, the raw water temperature is 10 ° C., and the electric conductivity is 90 μS / cm. The silver ion concentration gradually decreases as the raw water flow rate increases. Is shown.

Therefore, if the relationship between the flow rate of the raw water and the current value when the silver ion concentration in the silver ion water is kept constant is measured in advance, and the current value is controlled in accordance with the relationship and the flow rate,
The silver ion concentration in the electrolyzed water (silver ion water) can always be kept constant.

FIG. 6 is a graph showing the relationship between the flow rate of the raw water and the current value when the silver ion concentration is set to each concentration. The current value applied to both electrodes 11 and 15 is represented by the voltage / current value. The setting device 22 controls the current value to be calculated from the relationship between the flow rate of the raw water and the current value based on the flow rate detection signal from the flow rate sensor 24. As a result, the silver ion concentration in the generated silver ion water is maintained at a set constant value irrespective of fluctuations in the flow rate of the raw water.

FIG. 7 shows an electrolytic apparatus for carrying out the third production method of the present invention, except that an electric conductivity sensor 25 is interposed in the supply pipe 14 constituting the electrolytic cell 10. Has the same configuration as that of the first electrolysis device shown in FIG. Therefore, in the electrolysis device, the same components as those in the first electrolysis device are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the electrolysis apparatus, a potential conductivity sensor 25 is interposed in the supply line 14 of the electrolysis tank 10.
A voltage / current value setting device 22 is connected to the power supply 23. The voltage / current value setting device 22 receives the two electrodes 11, 1 based on the flow rate detection signal from the electric conduction sensor 25.
5 functions to control the applied voltage and current to the supply line 5. When the silver ion water is generated, the supply line 1
4, raw water such as tap water is supplied at a predetermined flow rate, and a power source 23 supplies an anode 15 and a cathode 11 (the cylindrical body 1).
A predetermined value of voltage / current is applied to 1).

Thus, during electrolysis, a predetermined amount of silver flows out of the anode 15 as silver ions into the electrolytic solution, and silver ion water is generated in the tank. The generated silver ion water is supplied to the cover plate 13.
Through an outlet line 16 connected to

FIG. 8 is a graph showing the relationship between the electric conductivity of the raw water and the silver ion concentration in the electrolytic water when the current value applied to both electrodes, the water temperature and the flow rate of the raw water are kept constant. The graph shows the silver ion concentration with respect to the electric conductivity when the applied current value is 20 mA, the raw water temperature is 20 ° C., and the flow rate is 2 l / min. The silver ion concentration gradually decreases with the increase in the electric conductivity of the raw water. It indicates that

Therefore, the relationship between the electric conductivity of the raw water and the current value when the silver ion concentration in the silver ion water is kept constant is measured in advance, and the current value is controlled in accordance with this relationship and the electric conductivity. If this is the case, the silver ion concentration in the electrolyzed water (silver ion water) can always be kept constant. FIG. 9 is a graph showing the relationship between the electric conductivity of raw water and the current value when the silver ion concentration was set to each concentration.
The current value applied to the first and the first 15 is set to a voltage / current value setting device 2
In step 2, based on the flow rate detection signal from the electric conductivity sensor 25, the current value is controlled to the current value calculated from the relationship between the electric conductivity of the raw water and the current value. As a result, the silver ion concentration in the generated silver ion water is maintained at a set constant value irrespective of fluctuations in the electric conductivity of the raw water.

Although the above description is directed to an example of a method for producing silver ion water, the method for producing copper ion water is not limited to the anode constituting the electrolysis apparatus shown in FIGS. 1, 4 and 7. 15 may be converted into a metal material that elutes copper ions, and by using such an electrolysis apparatus, copper ion water can be generated in the same manner as silver ion water.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an electrolysis apparatus for producing silver ion water, which is a first production method of the present invention.

FIG. 2 is a graph showing a relationship between silver ion concentration in silver ion water and raw water temperature.

FIG. 3 is a graph showing a relationship between a raw water temperature and a current value in silver ion water having various silver ion concentrations.

FIG. 4 is a schematic configuration diagram showing an electrolyzer for generating silver ion water according to a second generation method of the present invention.

FIG. 5 is a graph showing a relationship between a silver ion concentration in silver ion water and a flow rate of raw water.

FIG. 6 is a graph showing the relationship between the flow rate of raw water and the current value in silver ion water having various silver ion concentrations.

FIG. 7 is a schematic configuration diagram showing an electrolyzer for generating silver ion water as a third generation method of the present invention.

FIG. 8 is a graph showing the relationship between silver ion concentration in silver ion water and electric conductivity of raw water.

FIG. 9 is a graph showing the relationship between the electric conductivity and the current value of raw water in silver ion water having various silver ion concentrations.

[Explanation of symbols]

Reference numeral 10: electrolytic cell, 11: cylindrical body (cathode), 12: bottom plate, 1
3 ... cover plate, 14 ... supply line, 15 ... anode, 16 ... outflow line, 21 ... water temperature sensor, 22 ... voltage / current value setting device,
23 ... power supply, 24 ... flow rate sensor, 25 ... electric conductivity sensor.

Claims (3)

[Claims] 1. A method for producing antibacterial metal ion water by electrolyzing raw water in an electrolytic cell having a metal that elutes antibacterial metal ions as an anode, wherein the temperature of the raw water supplied to the electrolytic cell is adjusted. And calculating in advance the relationship between the ion concentration of the metal ion and the voltage / current value applied to the anode and the cathode of the electrolytic cell based on the detected water temperature and the relationship between the water temperature and the metal ion concentration. A method for producing antibacterial metal ion water, comprising: 2. A method for producing antibacterial metal ion water by electrolyzing raw water in an electrolytic cell having a metal that elutes antibacterial metal ions as an anode, wherein a flow rate of the raw water supplied to the electrolytic cell. And calculating in advance the relationship between the ion concentration of the metal ion and the voltage / current value applied to the anode and cathode of the electrolytic cell based on the detected flow rate and the relationship between the flow rate and the metal ion concentration. A method for producing antibacterial metal ion water, comprising: 3. A method for generating antibacterial metal ion water by electrolyzing raw water in an electrolytic cell having a metal that elutes antibacterial metal ions as an anode, wherein the raw water is supplied to the electrolytic cell. The relationship between the conductivity and the ion concentration of the metal ion is calculated in advance, and based on the detected electrical conductivity and the relationship between the electrical conductivity and the metal ion concentration, the voltage applied to the anode and the cathode of the electrolytic cell. A method for producing antibacterial metal ion water, comprising controlling an electric current value.