JP3571258B2 - Electrolyzed water generator - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electrolyzed water generating apparatus for generating electrolyzed water by electrolyzing a saline solution or a hydrochloric acid aqueous solution in a non-diaphragm electrolytic cell, and specifically, to easily generate electrolyzed water containing predetermined available chlorine. The present invention relates to a devised electrolytic water generation device.
[0002]
[Prior art]
In a conventional electrolyzed water generating apparatus using a non-diaphragm electrolytic cell, there is, for example, a method and apparatus for producing sterilized water described in Japanese Patent No. 2627100. It is described that 0 to 200 ppm of electrolytic sterilizing water can be produced.
[0003]
According to the conventional invention, a certain amount of a sodium chloride aqueous solution and a predetermined amount of a hydrochloric acid aqueous solution are diluted with raw water to discharge a predetermined amount of a saline solution and a hydrochloric acid aqueous solution. And then electrolyze the mixed water to generate electrolyzed water of a predetermined residual chlorine.Furthermore, raw water is added to the electrolyzed water, mixed, diluted, It is configured to generate electrolyzed water (product water) diluted to a concentration.
[0004]
[Problems to be solved by the invention]
However, according to the production method and apparatus of the conventional invention described above, electrolyzed water with a low residual chlorine can be easily generated by diluting raw water. The only option is to reduce the amount of raw water to be produced, and it has been very difficult to produce a large amount of electrolyzed water containing highly concentrated residual chlorine.
[0005]
Therefore, a technical problem of the present invention is to provide an electrolyzed water generation apparatus that can generate electrolyzed water containing a high concentration of residual chlorine in a large amount, relatively easily.
[0006]
[Means for Solving the Problems]
Means taken by the present invention to solve the above technical problems are as follows.
[0007]
While applying a voltage to each of the anode side and the cathode side of a diaphragm-free electrolytic cell having a DC power supply circuit, a saturated saline solution, a high-concentration saline solution, or a hydrochloric acid aqueous solution is used as a liquid to be electrolyzed in the electrolytic cell. To generate the electrolyzed water by feeding in, and sequentially supply the generated electrolyzed water to the raw water supply passage for supplying the raw water such as tap water through the electrolyzed water discharge pipe . Mixing, diluting , an electrolyzed water generating apparatus configured to open and take out one or a plurality of take-out valves provided in a pre-stopping manner at an end of a raw water supply channel, and take out the diluted electrolyzed water ,
[0008]
(1) A flow rate detecting means for detecting an amount of water used is provided in the raw water supply channel , and a water inlet electromagnetic switch for opening and closing the water channel is provided at a distal end side of the water supply channel and upstream of a connection portion of the electrolytic water discharge pipe. A valve and a check valve are provided, and a check valve is provided in the electrolytic water discharge pipe, and the pump feeds the electrolytic solution into the electrolytic cell based on the flow rate of the raw water detected by the flow rate detecting means. Is controlled by mixing the raw water with a predetermined ratio of electrolyzed water corresponding to the flow rate used to dilute the raw water, and the ON / OFF duty ratio between the anode and cathode electrodes is adjusted. When a variable pulse current is supplied, and the ON / OFF duty ratio is increased, the ON time ratio of the current is increased in proportion to the increase of the use flow rate of the raw water, and conversely, the ON / OFF duty ratio is decreased. Is when the current is ON To reduce the ratio in proportion to the decrease. (Claim 1)
[0009]
(2) From the relation between the amount of the electrolyzed solution with respect to the amount of raw water required to generate the electrolyzed product water of each available chlorine concentration and the ON / OFF duty ratio of the electrolysis current to the electrolyzed solution, the flow rate detecting means The supply amount of the electrolyte to the detected flow rate of the raw water and the ON / OFF duty ratio of the electrolytic current are determined, and the pump for supplying the electrolyte and the DC power supply circuit of the diaphragm-free electrolytic cell are determined according to the determined data. To be configured to perform electrolysis under control. ( Claim 2 )
[0010]
(3) Provide an effective chlorine concentration input setting device capable of selecting and inputting the effective chlorine concentration. ( Claim 3 )
[0011]
According to the means according to claim 1 described in the above (1), a predetermined effective chlorine concentration is contained by mixing and diluting electrolyzed water electrolyzed in a non-diaphragm electrolytic cell with raw water such as tap water. Electrolyte dilution water in the alkaline region (hereinafter referred to as electrolysis dilution water) can be generated. In this case, the amount of electrolyzed water to be discharged and mixed can be accurately controlled in accordance with the flow rate of raw water. The electrolytic dilution product water can be generated, and as a result, it is possible to relatively easily generate a large amount of the electrolytic dilution product water containing the strong residual chlorine.
[0012]
Further, according to the means according to claim 1 described in the above (1), mixing amount of the electrolytic water to be mixed ejected against the raw water is generated by the non-diaphragm electrolytic cell, the supply amount of the raw water flow detection It is determined by increasing or decreasing the supply amount of the electrolytic solution to the electrolytic cell in accordance with the increase or decrease in the amount of the electrolytic solution, so that the discharge of the electrolytic water can be accurately performed in a stable state, To increase the ON / OFF duty ratio of the DC current supplied between the electrodes, increase the ON time ratio when increasing the flow rate of raw water, and decrease the ON time ratio when decreasing the flow rate. And generate it.
[0013]
Further, according to the means according to claim 1 described in the above (1), a so-called destination stop type that can utilize removed electrolytic dilution produced water by opening a valve provided at the tip portion of the raw water water supply passage Therefore, it is possible to solve the problem that the effective chlorine concentration of the electrolyzed diluted water is always constant until the water reaches the valve at the tip, and thus the effective chlorine concentration becomes low at the start of feeding.
[0014]
Further, according to the means according to claim 1 described in the above (1), while a check valve is provided in a discharge pipe for supplying electrolytic water to the raw water supply path, a raw water supply path upstream of a connection portion of the discharge pipe. Since a water intake solenoid valve and a check valve are provided for opening and closing the water channel, when the above valve is closed and water intake is stopped, the water supply to the raw water supply channel is shut off, and at the same time, between the check valve and the valve, Since the movement of water is stopped and the stopped state is maintained, the effective chlorine concentration of the dilution water does not change until the valve is opened again and water intake is started. Can be maintained.
[0015]
According to the measures according to claim 2 as described above (2), and the flow rate (supply amount) of the raw water and the electrolytic solution necessary to obtain an electrolytic dilution water produced for each effective chlorine concentration, supplied between the electrodes The electrical conditions relating to the current to be generated are stored in the memory as control data in advance, and each part can be controlled according to the control data to generate the electrolytic dilution product water. It is possible to produce a desired amount of electrolytic dilution product water.
[0016]
According to the measures according to claim 3 mentioned above (3), only the input to set the effective chlorine concentration using an input setting device, capable to generate electrolytic dilution product water predetermined effective chlorine concentration I do.
[0017]
As described above, the technical problems described above can be solved by means of the above (1) to ( 3 ), and the problems of the conventional technology can be solved.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an electrolyzed water generating apparatus according to the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 are configuration diagrams illustrating the whole of the present invention. Is an electrolyzed water generating apparatus according to the present invention, 1 is a raw water supply source such as tap water, 2 is a raw water supply channel connected to the supply source 1, and 3 is a raw water supply passage provided in the middle of the water supply channel 2. The flow control valves 8 and 9 also denote a water inlet electromagnetic valve provided in the middle of the water supply passage 2 for opening and closing the water passage, and a flow sensor (flow detection means) for detecting the usage (flow) of raw water.
[0019]
Further, in FIG. 1, 6 is a salt tank containing salt, 2A is a water supply pipe for feeding raw water flowing through the water supply channel 2 to the salt tank 6, 4 is a water supply valve provided in the middle of the water supply pipe 2A, 5 Denotes a water level sensor. The electrolyte to be formed of the saturated saline solution or the high-concentration saline solution produced in the above-mentioned salt tank 6 is supplied through the supply pipe 7 through the supply pipe 7 while the feeding amount is controlled by the metering pump 7P. It is sent to and electrolyzed.
[0020]
On the other hand, in FIG. 2, reference numeral 15 denotes a hydrochloric acid tank containing a hydrochloric acid aqueous solution diluted to a predetermined concentration in advance. The hydrochloric acid aqueous solution is also supplied as an electrolytic solution while the supply amount is controlled by the above-described metering pump 7P. Is fed into the non-diaphragm electrolytic cell 10 through which the electrolysis is performed.
[0021]
1 and 2, reference numerals 10X and 10Y denote an anode and a cathode provided inside the diaphragm-free electrolytic cell 10, and reference numeral 12 denotes a DC power supply for applying a DC voltage to these bipolar electrodes 10X and 10Y. The electrolyte to be formed of either a saturated saline solution, a high-concentration saline solution, or a hydrochloric acid aqueous solution fed into the diaphragm-free electrolytic cell 10 by the metering pump 7P is electrolyzed in the electrolytic cell 10 to generate electrolytic water. Further, the generated electrolyzed water is sent through the discharge pipe 2B to the end portion 2 'of the raw water supply channel 2 and mixed and diluted with the raw water, and then one or more valves provided at the end portion 2' It is configured in a so-called first stop method that takes out from 2P.
[0022]
The present invention relates to an electrolyzed water generating apparatus using the non-diaphragm electrolytic cell 10 configured as described above, based on the usage amount (flow rate) of raw water detected by the flow rate sensor 9 provided in the raw water supply passage 2. Controlling the amount of the solution to be electrolyzed into the electrolytic cell 10 by the metering pump 7P to mix and dilute raw water with a predetermined ratio of electrolytic water corresponding to the flow rate used. A pulse current for varying the ON / OFF duty ratio is applied between the anode 10X and the cathode 10Y of the non-diaphragm electrolytic cell 10. The ON / OFF duty ratio is set to the ON time ratio when the flow rate of raw water is increased. To increase in proportion to the increase, and to decrease in the case of decrease. Raw water detected by the flow rate sensor 9 in relation to the amount of the electrolyte to the amount of raw water required to produce the electrolytic dilution product water of each available chlorine concentration and the ON / OFF duty ratio of the electrolytic current to the electrolyte. The point where the supply amount of the liquid to be electrolyzed and the ON / OFF duty ratio of the electrolysis current with respect to the flow rate value are determined, and the above-described metering pump 7P and the DC power supply 12 are controlled according to the determined data to perform the electrolysis. In addition, an input setting device 14 that can select and input the available chlorine concentration is provided. The specific configuration will be described below.
[0023]
In FIG. 1 and FIG. 2, the reference numeral 30 generally designates a control device equipped with a microcomputer, and the control device 30 includes the above-described flow control valve so as to perform the above-described operations. 3, a water level sensor 5, a metering pump 7P, a water inlet solenoid valve 8, a flow sensor 9, a DC power supply 12, a display device 13, and an input setting device 14, and in the embodiment shown in FIG. The water supply valve 4 is connected.
[0024]
FIG. 3 is a block diagram illustrating the electrical configuration of a control device 30 equipped with the microcomputer. In the figure, reference numeral 20 denotes a CPU that forms the center of the control device, and reference numeral 21 denotes a system program including programs to be described later. The stored memory 23 is an interface circuit connected between the CPU 20 and the memory 21 via the bus 22. The interface circuit 23 includes the above-described flow control valve 3, the water level sensor 5, and the metering pump 7P. , A water supply solenoid valve 8, a flow sensor 9, a DC power supply 12 including an anode 10X and a cathode 10Y, a power switch (not shown), a display device 13, an input setting device 14, and a water supply valve 4, Further, based on an instruction from the CPU 20, a pulse current having a predetermined ON / OFF duty ratio is supplied to the anode 10X and the cathode 10X. Pulse current control device 11 to flow between the electrodes of 0Y is connected and has a mechanism in which each is control operation according to a program stored in the memory 21 under the supervision of the CPU 20.
[0025]
Further, as described above, the memory 21 constituting the control device 30 stores the raw water use amount (flow rate) detected by the flow rate sensor 9 provided in the raw water supply passage 2 by the metering pump 7P. A program for mixing and diluting raw water with a predetermined ratio of electrolyzed water corresponding to the flow rate of the raw water by controlling the amount of the solution to be electrolyzed to the electrolyzer 10 and an anode 10X of the diaphragmless electrolyzer 10 And a pulse current for varying the ON / OFF duty ratio is passed between each electrode of the cathode 10Y and the ON / OFF duty ratio is increased in proportion to the increase of the ON time ratio when the flow rate of the raw water increases, In the event of a decrease, a program to reduce the amount in proportion to the decrease, and the electrolyte to be treated relative to the amount of raw water required to produce electrolytic dilution product water of each available chlorine concentration From the relationship between the amount and the ON / OFF duty ratio of the electrolytic current with respect to the electrolytic solution, the supply amount of the electrolytic solution with respect to the flow value of the raw water detected by the flow sensor 9 and the ON / OFF duty ratio of the electrolytic current are determined. A program for controlling the metering pump 7P and the DC power supply 12 according to the determined data to perform electrolysis, and a program for determining the available chlorine concentration of the produced water based on the setting operation by the input setting device 14. Is stored.
[0026]
FIG. 4 shows the discharge amount (ml / min) of the saturated saline solution to the electrolytic cell 10 by the metering pump 7P and the percentage of the ON time per unit time of the anode 10X and the cathode 10Y on the vertical axis, which are discharged from the nozzle 2P. Is a graph showing the relationship between each available chlorine concentration (50 ppm, 100 ppm, 200 ppm) when the production amount (L / min) of the electrolytic dilution product water is plotted on the horizontal axis, and the data shown in this graph. Thus, the supply amount of the electrolytic solution with respect to the flow rate of the raw water for each available chlorine concentration and the ON / OFF duty ratio of the electrolytic current are determined.
[0027]
In FIGS. 1 and 2, 2W and 2Z are a check valve and a pressure reducing valve provided on the supply source 1 side of the raw water supply channel 2, 2X and 2Y are a tip side 2 ′ of the water supply channel 2 , and The upstream part of the connection part of the water discharge pipe 2B and the check valve provided in the electrolytic water discharge pipe 2B are shown.
[0028]
Since the electrolyzed water generating apparatus according to the present invention has the configuration as described above, the electrolyzed water electrolyzed in the electrolyzer 10 is mixed and diluted with the raw water flowing through the water supply channel 2 to provide a predetermined effective chlorine concentration. Although it is possible to generate electrolyzed product water in an alkaline region, in the present invention, in particular, the amount of electrolyzed water discharged from the electrolysis tank 10 and mixed with the flow rate of raw water is controlled by the metering pump 7P. Therefore, it is possible to generate electrolytic dilution product water diluted to a stable concentration.
[0029]
The flow rate of the electrolyzed water generated in the electrolyzer 10 and mixed and diluted with the raw water is always stable since the flow rate of the raw water is detected by the sensor 9 and the supply amount is determined by controlling the above-mentioned metering pump 7P according to the increase or decrease. In addition to mixing and diluting the raw water, the ON / OFF duty ratio of the current flowing between the two electrodes is changed accordingly. In such a case, since the ON time is adjusted to be short, electrolytic dilution water having the same effective chlorine concentration can be generated.
[0030]
Further, according to the present invention, since a so-called tip-stop type in which a valve 2P for taking out the electrolytic dilution water (produced water) is provided at the distal end side 2 'of the raw water supply channel 2, the effective chlorine concentration is reduced at the start of feeding. There is no problem of lowering the concentration of the electrolyzed water, and a constant concentration of electrolyzed diluted water can always be taken out . In addition, a water inlet electromagnetic valve 8 and a check valve 2X for opening and closing the water channel are provided on the front end side 2 ', and Also, since the check valve 2Y is provided, when the valve 2P is closed, the electrolytic dilution water does not flow back to the electrolytic cell 10 and the concentration does not change due to the influence of tap water from the upstream. Therefore, by opening the valve 2P, it becomes possible to always take out the electrolytic dilution product water of a certain concentration.
[0031]
In addition, the memory 21 constituting the control device 30 stores, in accordance with the experimental data as shown in FIG. Since the control data for the 12 electrical conditions (ON / OFF duty ratio) is stored in advance, the required effective chlorine concentration can be input simply by using the input setting device 14 so that the so-called effective chlorine concentration is quickly and easily obtained. It is possible to generate electrolytic dilution water having a chlorine concentration.
[0032]
【The invention's effect】
As described above, according to the electrolyzed water generation apparatus according to the present invention, it is necessary to increase the supply amount of raw water and increase the supply amount of electrolyzed water to keep the effective chlorine concentration constant in accordance with the increase. A large amount of electrolyzed diluted water containing effective chlorine concentration can be obtained in a large amount by a simple operation , and it can always be obtained in a stable state. It has the advantage that it can be supplied.
[Brief description of the drawings]
FIG. 1 is a configuration diagram illustrating a configuration of an electrolyzed water generation device according to the present invention.
FIG. 2 is a configuration diagram illustrating another configuration of the electrolyzed water generation device according to the present invention.
FIG. 3 is a block diagram illustrating an electrical configuration of the present invention.
FIG. 4 is a graph illustrating the relationship between the amount of saturated saline added, the percentage per unit time that an electrode is turned on, and the amount of generation.
[Explanation of symbols]
ST Electrolyzed water generator 2 Raw water supply channel 2 'Tip side
2P Valve for taking out the electrolysis dilution water
2B Electrolytic water discharge pipe
2X, 2Y Check valve 3 Flow control valve 6 Salt tank 7P Metering pump 9 Flow rate sensor 10 Non-diaphragm electrolytic cell 10X Anode 10Y Cathode 11 Pulse current control device 12 DC power supply 14 Input setting device 15 Hydrochloric acid tank 20 CPU
21 memory 30 controller

Claims (3)

While applying a voltage to each of the anode side and the cathode side of a diaphragm-free electrolytic cell having a DC power supply circuit, a saturated saline solution, a high-concentration saline solution, or a hydrochloric acid aqueous solution is used as a liquid to be electrolyzed in the electrolytic cell. To generate the electrolyzed water by feeding in, and sequentially supply the generated electrolyzed water to the raw water supply passage for supplying the raw water such as tap water through the electrolyzed water discharge pipe . Mixing, diluting , an electrolyzed water generating apparatus configured to open and take out one or a plurality of take-out valves provided in a pre-stopping manner at an end of a raw water supply channel, and take out the diluted electrolyzed water ,
The raw water supply channel is provided with a flow rate detecting means for detecting an amount of water used , and at a tip side of the water supply channel , and at a portion upstream of a connection portion of the electrolytic water discharge pipe, a water supply solenoid valve for opening and closing the water channel is provided. A stop valve is provided, and a check valve is provided in the electrolytic water discharge pipe, and the amount of the electrolyte to be fed into the electrolytic cell by the pump is controlled based on the used flow rate of the raw water detected by the flow rate detecting means. Thereby, a predetermined ratio of electrolyzed water corresponding to the flow rate of the raw water is mixed and diluted with the raw water, and the ON / OFF duty ratio between the anode and the cathode is made variable. A pulse current is made to flow, and the ON / OFF duty ratio is increased in proportion to the increase of the use flow rate of the raw water when the use flow rate of the raw water is increased, and is decreased when the use flow rate of the raw water is decreased. ON time ratio Electrolyzed water production apparatus characterized by being configured to reduce in proportion to the decrease. It was detected by the flow rate detecting means from the relationship between the amount of the electrolyte to the amount of raw water necessary to generate the electrolytic dilution product water of each effective chlorine concentration and the ON / OFF duty ratio of the electrolytic current to the electrolyte. The supply amount of the electrolytic solution with respect to the flow rate of the raw water and the ON / OFF duty ratio of the electrolytic current are determined, and the pump for supplying the electrolytic solution and the DC power supply circuit of the diaphragm-free electrolytic cell are controlled according to the determined data. The electrolyzed water generation apparatus according to claim 1, wherein the apparatus is configured to perform electrolysis. 3. The electrolyzed water generator according to claim 1, further comprising an effective chlorine concentration input setting device capable of selecting and inputting the effective chlorine concentration.

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