JP3903524B2 - Electrolyzed water generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrolytic cell that continuously generates electrolytic water of alkaline water and acidic water, and water quality that electrochemically measures water quality such as raw water for tap water or purified water thereof, or alkaline or acidic electrolytic water generated in an electrolytic cell. The present invention relates to an electrolyzed water generating device formed by providing a measuring device.
[0002]
[Prior art]
  As an electrolyzed water generating apparatus 1 provided with an electrolyzer 2 and an electrochemical water quality measuring device 20,10The structure shown in FIG. 1 is provided by the present applicant. Figure10The electrolyzed water generating device 1 shown in FIG. 1 is a so-called alkaline ion adjuster composed of an electrolyzer 2, a water purifier 3, an electrolyte (electrolysis promoter) supply device 4, and the like. The inside of the tank is divided into an electrode chamber 7 arranged and an electrode chamber 9 arranged with an electrode 8.
[0003]
And the raw water in which tap water is generally used is first purified through the water purifier 3. The water purifier 3 removes odorous components such as organic substances, inorganic substances or hypochlorous acid contained in the raw water, and is usually constituted by a microfilter such as an antibacterial activated carbon filter and a hollow fiber membrane. Next, the purified water that has flowed out of the water purifier 3 is divided into an inflow path 11 that communicates with the electrode chamber 9 and an inflow path 10 that communicates with the electrode chamber 7 and flows into the electrolytic cell 2. In this way, the water that flows into the electrode chamber 7 of the electrolytic cell 2 is continuously supplied with an electrolyte that promotes electrolysis from the electrolyte supply device 4 that is connected upstream of the electrode chamber 7. As the electrolyte, a calcium salt such as calcium lactate or calcium glycerophosphate is used.
[0004]
As described above, while electrolytically supplying water to the electrolytic cell 2, an electrolytic voltage of the anode is applied to the electrode 6 and an electrolytic voltage of the cathode is applied to the electrode 8 to perform electrolysis, whereby alkaline water is supplied to the electrode chamber 9. Acidic water (so-called acidic ionized water) is generated in the electrode chamber 7 (so-called alkaline ionized water). The alkaline water thus generated is discharged from the outflow passage 12 and the acidic water is discharged from the outflow passage 13 through separate flow paths.
[0005]
When the electrolyte is supplied from the electrolyte supply device 4 to the cathode electrode chamber 9, the electrolyte is mixed into the alkaline water discharged from the electrode chamber 9, so that only the water flowing into the electrode chamber 7 is supplied from the electrolyte supply device 4. An electrolyte is added. In particular, when calcium lactate is used as the electrolyte, lactic acid ions may be used as precursors to produce volatile organochlorine compounds, etc., so lactate ions are mainly added to alkaline water used for drinking and the like. It is necessary to avoid contamination. For this reason, only the calcium ions are added to the alkaline water in the cathode electrode chamber 9 and the lactic acid ions are discharged together with the acidic water in the electrode chamber 7 by causing the electrolyte-added water to flow into the anode electrode chamber 7. It is like that. Here, since the lactic acid ions are added to the acidic water produced simultaneously with the production of the alkaline water to have an astringent effect, it is used for the purpose of astringent.
[0006]
Since the pH value of alkaline or acidic electrolyzed water obtained by electrolysis in the electrolytic cell 2 as described above follows the Faraday law according to the amount of electricity supplied for electrolysis, conventionally, It was estimated from the amount of electricity required for electrolysis. However, the quality of the electrolyzed water generated in the electrolyzer 2 is not limited to the amount of electricity supplied for electrolysis, the flow rate of water to the electrolyzer 2, the residence time of water in the electrolyzer 2, electrolysis It also depends on the ratio of the flow rate of water into the tank 2 and the volume of the electrolytic tank 2. For example, the longer the residence time of water in the electrolytic cell 2, the higher the electrolysis efficiency, and the electrolysis efficiency is less than 100% (in general, the electrolysis efficiency is about 10% in a continuous water electrolyzed water generator). The quality of the electrolyzed water produced varies depending on the abundance ratio of electrolyzed water and unelectrolyzed water. The water quality after electrolysis is also affected by dissolved components contained in water, particularly various ion species and dissolved gases having buffering properties such as bicarbonate ions.
[0007]
Thus, the quality of the electrolyzed water obtained by the electrolyzed water generating device is greatly influenced not only by the voltage applied in the electrolyzer 2 but also by the amount of water flowing into the electrolyzer 2 and the quality of the raw water. The water quality cannot be determined from the estimated value calculated backward from the amount of electricity required for electrolysis. Therefore, as shown in FIG. 12, an electrochemical water quality measuring device 20 is provided in the outflow passages 12 and 13 of the alkaline water and acidic water generated in the electrolytic cell 2, and the water quality of the electrolytic water is directly measured correctly. It is.
[0008]
Here, the electrolyzed water flowing out from the electrolytic cell 2 has a flow rate of several cm / sec to several tens of cm / sec, and in order to continuously measure the electrolyzed water in real time, the measurement principle does not cause a time lag. However, the electrochemical water quality measuring device 20 using the electrochemical measurement principle can measure the water quality by directly contacting the test solution passing through the working electrode (detection electrode). Therefore, the electrochemical measuring device 20 is the most suitable as the water quality measuring means in the electrolyzed water generating apparatus 1, and the pH, oxidation-reduction potential, various ions are used by using the electrochemical water quality measuring device 20. The concentration is measured. For example, in the electrolyzed water generating apparatus described in Japanese Utility Model Publication No. 56-172391, a pH sensor is provided as an electrochemical water quality measuring device, and the pH value of the generated electrolyzed water is displayed. Moreover, in the electrolyzed water generating apparatus described in JP-A-5-64785, a pH sensor is provided as an electrochemical water quality measuring device, and the deviation pH with respect to the target set pH value is set based on the output signal of the pH sensor. Feedback control to increase or decrease the corresponding electrolysis voltage or flow rate is performed.
[0009]
  The water quality measuring instrument using the electrochemical measurement principle as described above is formed by including an electrode composed of a working electrode (detection electrode) and a reference electrode. The water quality is measured by detecting a potential difference or current change between the two, and an outline of the structure of the electrochemical water quality measuring device 20 is illustrated.7~ Figure9Shown in
[0010]
  Figure7Is a pH sensor, diagram8Indicates an oxidation-reduction potential sensor, and the main body portion of the electrochemical water quality measuring device 20 includes a sealing portion 18 that encloses an internal solution 16 such as a saturated or 3.3 M (mol / L) potassium chloride solution, It is formed with a sample solution chamber 19 through which electrolyzed water is passed. A liquid junction holding member 24 is provided between the sealed portion 18 and the test solution chamber 19, and a liquid junction (salt bridge) 22 formed on the liquid junction holding member 24 with a porous material such as alumina ceramics. Is held. Note that a cellulose-based thickener such as carboxymethyl cellulose or hydroxyethyl cellulose may be added to the internal solution 16 in order to stably dissolve potassium chloride and prevent crystallization. A silver / silver chloride electrode is usually used as the electrode of the comparative electrode portion 21, and the comparative electrode portion 21 is immersed in the internal solution 16. Further, as the detection working electrode portions 28a and 28b, FIG.7In the pH sensor, the internal electrode 26a is formed as enclosed in the glass sensitive film 27, and FIG.8In this redox potential sensor, a non-reactive metal electrode 26b such as platinum or gold is used, and this electrode 26b is attached to the tip of an insulating coating 29 such as a heat-shrinkable Teflon tube or glass covered with a lead wire 44 such as a platinum wire. It is formed as an object. The lower portions of the working electrode portions 28 a and 28 b are exposed to the test solution chamber 19 through the liquid junction holding member 24.
[0011]
  Also figure9Is a figure7PH sensor and diagram8The oxidation / reduction potential sensor is integrated, and both the pH sensor and the oxidation-reduction potential sensor can be used in common for the pH electrode and the oxidation-reduction potential sensor so that both the pH and the oxidation-reduction potential can be measured. Of the type.
  Figure7Thru figure915 is an internal solution replenishing port, 30 is an inlet, 31 is an outlet, and electrolyzed water as test water enters the test solution chamber 19 from the inlet 30 and flows out from the outlet 31. It is designed to flow inside. The electromotive force generated between the reference electrode portion 21 immersed in the internal solution 16 and the working electrode portions 28a and 28b in contact with the electrolyte in the test solution chamber 19 is appropriately determined by the amplification portion 14 formed by an amplification amplifier. Are amplified and output as a corresponding voltage, and are input to the control unit after A / D conversion. In the case of a pH sensor or an oxidation-reduction potential sensor, the voltage is generally amplified to 0 to 5 V in accordance with the electromotive force value and output. The amplifying unit 14 is often integrated with the electrochemical water quality measuring device 20, and a voltage for starting the amplifying unit 14 is supplied from the electrolyzed water generating apparatus 1.
[0012]
[Problems to be solved by the invention]
However, the electrolyzed water generating apparatus 1 provided with the electrochemical water quality measuring apparatus 20 having the above structure has the following three problems.
First, the first problem will be described. That is, when water is electrolyzed in the electrolytic cell 2, the electrode 8 is in the cathode electrode chamber 9.
2H₂O + 2e^-→ 2OH^-+ H₂
In the electrode chamber 7 where the electrode 6 is an anode,
2H₂O → 4H⁺+ O₂+ 4e^-
2Cl^-→ Cl₂+ 2e^-
At the same time, alkaline water and acidic water are generated, and hydrogen, oxygen, and chlorine are also generated. Hydrogen and oxygen are contained in the electrolyzed water as gas components.
[0013]
  And when measuring the electrolyzed water accompanied by such gas component bubbles through the test solution chamber 19 of the electrochemical water quality measuring device 20, especially when the flow rate passing through the test solution chamber 19 is small, the gas component ( There is a possibility that air bubbles (including air bubbles staying in the water channel) stay in the test solution chamber 19 as air bubbles. The retention of the bubbles is a portion of the test solution chamber 19 closer to the side opposite to the outlet 31 than the inlet 30 (see FIG.7~ Figure9This is likely to occur at a portion indicated by an arrow in FIG. When the air bubbles stay in the test solution chamber 19 in this way, it serves as a salt bridge that electrically connects the reference electrode portion 21 to the electrolyzed water in the test solution chamber 19 that is the test water through the internal solution 16. The liquid junction 22 is covered with a bubble layer, resulting in a disconnection state, resulting in a problem that measurement may become impossible.
[0014]
Next, the second problem will be described. When the flow rate of the test water passing through the test solution chamber 19 of the electrochemical water quality measurement apparatus 20 is large, the internal pressure in the test solution chamber 19 rises and the liquid junction 22 As a result, water pressure acts on the liquid junction part 22 from the side of the aqueous test solution chamber 19, and as a result, the resistance value of the liquid junction part 22 increases and an asymmetric potential is generated. There is a problem that the measurement accuracy of water quality by 20 may be affected.
[0015]
  Further, the third problem will be described. The figure which the electrochemical water quality measuring device 20 measures the pH value of electrolyzed water7Or figure9In the case of this type, a working electrode portion 28b for detection in which an internal electrode 26a is enclosed in a glass sensitive film 27 is used. In the electrolyzed water generating device 1 incorporating the electrochemical water quality measuring device 20 formed as described above, when the water is not passed through the electrolyzed water generating device 1, the inside of the test solution chamber 19 of the electrochemical water quality measuring device 20 When no water is present in this state and left untreated for a long time, the surface of the glass sensitive film 27 of the working electrode portion 28b is dried. And when the surface of the glass sensitive film | membrane 27 of the working electrode part 28b dries in this way, when it tries to measure the quality of electrolyzed water with the electrochemical water quality measuring device 20 next, it will flow through the electrolyzed water production | generation apparatus 1 There was a problem that the response of the measurement was slow.
[0016]
  The present invention has been made in view of the above points, and can prevent the measurement of water quality from becoming impossible due to bubbles remaining in the sample solution chamber of the electrochemical water quality measuring instrument.AndThis prevents the water pressure measurement accuracy from being affected by an increase in the internal pressure of the test water chamber of the electrochemical water quality measuring instrument.The purpose of the present invention is to provide an electrolyzed water generator.It is an object of the present invention to provide an electrolyzed water generating device that can prevent the surface of the glass sensitive film of the electrode part from being dried even if left untreated for a long time.
[0017]
[Means for Solving the Problems]
  The present invention generates alkaline water and acidic water by electrolyzing water, and is provided on the downstream side of the electrolytic cell, the electrolytic cell for flowing out the generated alkaline and acidic electrolytic water separately, and electrolysis An electrolyzed water generating device formed with an electrochemical water quality measuring device for electrochemically measuring at least one of the quality of electrolyzed water generated in a tank, wherein the water quality is passed through the electrolyzed water of the electrochemical water quality measuring device. An inlet and an outlet are provided in the sample solution chamber for measuring water, and the water channel between the inlet and outlet is positioned diagonally in the sample solution chamber and the inlet is positioned below the outlet. Arrange the inlet and outletThe opening area of the inlet is smaller than the opening area of the outletIt is characterized by comprising.
[0018]
  The invention of claim 2 is an electrochemical water quality measuring device.Is formed by providing a glass-sensitive membrane of the working electrode part for measuring pH in the test solution chamber, and the opening of the test solution chamber is located above the lower end of the glass-sensitive membrane.It is characterized by being provided.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
FIG. 1 shows an example of an electrolyzed water generating device 1 in which an electrolyzer 2, a water purifier 3, an electrolyte supply device 4, a water channel switching valve 32, an electrochemical water quality measuring instrument 20, and the like are housed in a housing 33. It is configured as. The water purifier 3 is provided with a filter medium 34 made of antibacterial activated carbon and a filter medium 35 made of a hollow fiber membrane. The two types of filter mediums 34 and 35 are housed in a single cartridge. Everything can be exchanged.
[0020]
The inside of the electrolytic cell 2 is partitioned by a diaphragm 5 into an electrode chamber 7 in which an electrode 6 is installed and an electrode chamber 9 in which an electrode 8 is installed. Roads 12 and 13 are provided. These outflow passages 12 and 13 are connected to discharge pipes 36 and 37 via a water passage switching valve 32. Here, the inflow path 10 and the outflow path 13 communicate with the electrode chamber 7 in the diaphragm 5 surrounding one electrode 6, and the inflow path 11 and the outflow path 12 communicate with the electrode chamber 9 surrounding the other electrode 8. However, the inflow path 10 is narrower than the inflow path 11 and is adjusted so that the flow rate flowing into the electrode chamber 7 side is smaller than the flow rate flowing into the electrode chamber 9 side at a ratio of 1: 3 to 1: 4. Has been. The water channel switching valve 32 communicates the outflow channel 13 and the discharge pipe 37 when communicating the outflow channel 12 and the discharge pipe 36, and connects the outflow channel 13 and the discharge pipe 37 when communicating the outflow channel 12 and the discharge pipe 37. An electromagnetic rotary valve or a motor type switching valve is configured to communicate with the discharge pipe 36.
[0021]
A thermistor 39 and a constant flow valve 41 are connected between the switching lever unit 43 connected to the water tap 42 and the water purifier 3, and a flow rate detection sensor 38 and an electromagnetic wave are connected between the water purifier 3 and the electrolytic cell 2. A valve 40 is disposed, and among the pipes individually connecting the electromagnetic valve 40 and the inflow paths 10 and 11, the electrolyte supply device 4 (calcium agent addition cylinder) is disposed in the middle of the pipe reaching the inflow path 10. ing. The electromagnetic valve 40 is connected to the drain port 44. When the flow rate detection sensor 38 detects that the water flow to the electrolyzed water generating device 1 is stopped, the electromagnetic valve 40 is opened after a certain time, and the inside of the electrolytic cell 2 And other residual water in the piping system is discharged from the discharge port 44. An electrochemical water quality measuring device 20 is disposed in the middle of the discharge pipe 37. The electrochemical water quality measuring device 20 will be described in detail later.
[0022]
Next, the flow of water when generating electrolyzed water from tap water will be described. When the switching lever unit 43 connected to the water tap 42 is switched so that water flows to the water purification device 3 side, water is introduced into the electrolytic cell 2 from the inflow paths 10 and 11 through the water purification device 3 and the electrolyte supply device 4. Although electrolysis is performed, application of the electrolysis voltage in the electrolytic cell 2 is started when water flow is detected by the flow rate detection sensor 38.
[0023]
If an instruction to obtain alkaline water is given, an electrolysis voltage is applied so that the electrode 6 of the electrolytic cell 2 serves as an anode and the electrode 8 serves as a cathode. Acidic water is generated in the chamber 7, and alkaline water is obtained on the outflow path 12 side, and acidic water is obtained on the outflow path 13 side. At this time, the water passage switching valve 32 is set in a state in which the outflow passage 12 and the discharge pipe 37 are communicated with each other, and the outflow passage 13 and the discharge pipe 36 are in communication with each other, and alkaline water is discharged to the discharge pipe 37 side for drinking and the like. The acidic water is discharged to the discharge pipe 36 side.
[0024]
When an instruction to obtain acid water is given, the following two water flows are made according to the degree of electrolysis of the indicated acid water. First, in the case of weakly acidic water, an electrolysis voltage is applied so that the electrode 6 in the electrolytic cell 2 is a cathode and the electrode 8 is an anode, and alkaline water is supplied in the electrode chamber 7 and acidic water is supplied in the electrode chamber 9. As a result, alkaline water is obtained on the outflow path 13 side and weak acidic water is obtained on the outflow path 12 side. At this time, the water channel switching valve 32 is set to the same state as described above, weakly acidic water is discharged to the discharge pipe 37 and used as astringent water or the like, and alkaline water is discharged to the discharge pipe 36 side.
[0025]
In the case of strongly acidic ionic water, an electrolysis voltage is applied so that the electrode 6 in the electrolytic cell 2 serves as an anode and the electrode 8 serves as a cathode, so that acidic water is generated in the electrode chamber 7 and alkaline water is generated in the electrode chamber 9. Alkaline water is obtained on the outflow path 12 side, and strongly acidic water is obtained on the outflow path 13 side. At this time, the water passage switching valve 32 is switched to a state in which the outflow passage 12 and the discharge pipe 36 are communicated with each other and the outflow passage 13 and the discharge pipe 37 are in communication with each other, and strong acid water is discharged into the discharge pipe 37 and sterilized. The alkaline water is discharged to the discharge pipe 36 side. Thus, when strong acidic water is discharged from the discharge pipe 37, the acid water is generated in the electrode chamber 7 using the electrode 6 as an anode. As described above, the inflow path 10 toward the electrode chamber 7 is an electrode. This is because it is easy to obtain strongly acidic water in the electrode chamber 7 because the inflow amount of water is reduced by narrowing the inflow passage 11 on the chamber 9 side.
[0026]
  As described above, the water quality of the electrolyzed water generated in the electrolytic cell 2 and discharged from the discharge pipe 37 is measured by the electrochemical water quality measuring device 20 disposed between the electrolytic cell 2 and the discharge pipe 37. As an example of the electrochemical water quality measuring device 20, a type that measures both pH and redox potential of electrolyzed water is illustrated.6Shown in the previous figure9Has the same structure as the above). This electrochemical water quality measuring device 20 is a potential difference detection type electrochemical sensor,6Then, although it demonstrates by the type which measures pH and oxidation-reduction potential, what measures dissolved components in water, such as various ion concentrations and dissolved gas, is also the same. In the lower part of the electrochemical water quality measuring device 20, a liquid junction holding member 24 is provided so as to partition the sealed portion 18 and the test solution chamber 19, and the liquid junction holding member 24 is made of a porous material such as alumina-based ceramics. A liquid junction (salt bridge) 22 formed of a material is held. An internal solution 16 such as a saturated or 3.3 M (mol / L) potassium chloride (KCl) solution is enclosed in the enclosure 18, and the internal solution 16 has a solution viscosity for stable elution of KCl. Cellulosic thickeners such as carboxymethyl cellulose and hydroxyethyl cellulose are added so as to be 4000 cps or more (usually preferably about 10,000 cps). The comparative electrode unit 21 is formed of a silver / silver chloride electrode and is immersed in the internal solution 16. Figure615 is an internal solution replenishing port, 30 is an inlet provided at the lower part of the test solution chamber 19, 31 is an outlet provided at the upper part of the test solution chamber 19, and electrolyzed water as test water is detected from the inlet 30. It enters into the lower part of the aqueous solution chamber 19 and flows through the test solution chamber 19 so as to flow out from the upper outlet 31.
[0027]
The working electrode portion 28b is a pH measuring electrode made of a glass sensitive film 27 or a semiconductor for measuring pH, and the working electrode portion 28a is a redox potential due to platinum or gold for measuring a redox potential. It is a non-reactive electrode for measurement, and all are installed so that the lower part is located in the test solution chamber 19. The working electrode portion 28a may be provided with an insulating coating portion 29 by encapsulating a platinum wire in glass, or the platinum wire may be provided with an insulating coating portion by heat-shrinking a Teflon tube. .
[0028]
  Figure as above7In the electrochemical water quality measuring instrument 20, the electrode is composed of the detection working electrodes 28 a and 28 b, the comparison electrode 21, and the liquid junction portion 22, and the action accompanying the change in the quality of the electrolyzed water passed through the test solution chamber 19. A change in potential difference between the electrodes 28a and 28b and the comparison electrode 21 is detected. The electromotive force generated in the electrochemical water quality measuring device 20 in this way is amplified at a predetermined amplification rate by the amplification unit 14 formed by an amplifier provided at the top of the electrochemical water quality measuring device 20. As a result, the voltage is converted and output as a considerable voltage, and further A / D converted by the A / D conversion unit 50 formed by an A / D conversion circuit or the like, and then input to the control unit 51. Yes. Here, if the pH or oxidation-reduction potential is measured, the amplification factor is set so that a voltage of 0 to 5 V is output according to the value. The figure6In this case, ± 12 V is applied as a voltage for starting up the amplifying unit 14.
[0029]
The control unit 51 is formed by a control circuit constituted by a microcomputer. An A / D conversion unit 50 is integrated in the control unit 51, and the control unit 51 is connected to the amplification unit 14 of the electrochemical water quality measuring instrument 20 via the A / D conversion unit 50. . Further, a display unit 52 is connected to the control unit 51 so that the pH value and the oxidation-reduction potential value are displayed on the display unit 52 based on the pH and oxidation-reduction potential data input to the control unit 51. It has become. Further, the above-described flow rate detection sensor 38 is connected to the control unit 51. Here, the control part 51 is comprised so that the electrolysis voltage applied to the electrodes 6 and 8 of the electrolytic cell 2 can be controlled by PMW control, and also the electrolyzed water produced | generated by the electrolytic cell 2 A comparison circuit between the target pH value and the pH value of the electrolyzed water measured by the electrochemical water quality measuring device 20 is built in, and the electrodes 6 and 6 are arranged so that the actually measured pH value of the electrolyzed water matches the target pH value. The feedback control of the electrolytic voltage applied to 8 is performed. For example, the feedback control is performed so that the state in which the pH value of the electrolyzed water measured by the electrochemical water quality measuring instrument 20 is within ± 0.1 pH is continued for 2 seconds. The point in time is stable.
[0030]
  Here, FIG. 2 shows an example of the electrochemical water quality measuring instrument 20 in an enlarged manner, and FIG. 3 shows the test solution chamber 19 in an enlarged manner, but the inlet 30 is one of the test solution chambers 19. The outlet 31 is provided open at the upper end of the other end of the test solution chamber 19. The electrolyzed water generated in the electrolytic cell 2 flows into the test solution chamber 19 from the inlet 30, and the water quality is measured while flowing through the test solution chamber 19, and then flows out from the outlet 31. An inflow port 30 is provided at one end of the test solution chamber 19 and an outflow port 31 is provided at the other end, and the inflow port 30 is positioned below the outflow port 31 so that the flow from the inflow port 30 is increased. The water channel flowing in the test solution chamber 19 to the outlet 31 is formed diagonally in the test solution chamber 19 from the lower part of one end of the test solution chamber 19 to the upper end of the other end. The figure7~ Figure9In this case, there is no portion that becomes a flow path bypass in which bubbles are accumulated as indicated by arrows B, and the bubbles that flow into the test solution chamber 19 from the inlet 30 together with water flow out from the outlet 31 according to the flow of water. Therefore, even when the flow rate passing through the test solution chamber 19 is small, bubbles do not stay in the test solution chamber 19, and the liquid junction 22 serving as a salt bridge for electrical conduction is covered with the bubble layer. The water quality can be stably measured without being affected by bubbles.
[0031]
  Also,as mentioned aboveThe inlet 30 is provided at the bottom of one end of the test solution chamber 19, and the outlet 31 is provided at the upper end of the other end of the test solution chamber 19.ButFurthermore, the inlet 30 and the outlet 31 are formed so that the opening area of the inlet 30 is smaller than the opening area of the outlet 31.
[0032]
In this case, it is possible to prevent air bubbles from staying in the test solution chamber 19 as described above, and the opening area of the inlet 30 is the outlet 31 even when the flow rate passing through the test solution chamber 19 is large. Therefore, it is possible to prevent the internal pressure of the test solution chamber 19 from increasing. Therefore, the water pressure acts on the liquid junction portion 22 from the side of the test solution chamber 19 to prevent water from entering the liquid junction portion 22, and the resistance value of the liquid junction portion 22 increases to generate an asymmetric potential. It is possible to prevent this and to prevent the measurement accuracy of water quality from being affected.
[0033]
  In addition, the figure4Shows an enlarged example of the electrochemical water quality measuring instrument 20, and FIG.52 shows an enlarged view of the test solution chamber 19, but the inlet 30 is at one end of the test solution chamber 19 and the outlet 31 is the test solution chamber, as in FIGS. 19 is provided at the upper end portion of the other end portion, and the opening of the inflow port 30 is located below the opening of the outflow port 31.2, Figure3As in the case of the above, the opening area of the inflow port 30 is made smaller than the opening area of the outflow port 31. In this case, the inlet 30 is formed in the test solution chamber 19 so as to rise upward from the bottom surface thereof, and the opening 30 a of the inlet 30 is positioned above the bottom of the test solution chamber 19. is there. The position of the opening 30a of the inflow port 30 is below the opening of the outflow port 31 and above the lower end portion of the glass sensitive film 27 of the working electrode portion 28b for measuring pH provided in the test solution chamber 19. It is set to become.
[0034]
  In this case, it is possible to prevent bubbles from staying in the aqueous test solution chamber 19 and to prevent the internal pressure of the aqueous test solution chamber 19 from rising, as described above. The water flow is stopped and the water in the electrolyzed water generator 1 is discharged.TheEven then, water has accumulated in the sample solution chamber 19 of the electrochemical water quality measuring instrument 20 up to the height of the opening 30a of the inlet 30 (the water level in the sample solution chamber 19 is indicated by a chain line in FIG. 7). . Therefore, even if left untreated for a long time, the glass sensitive film 27 of the working electrode portion 28b is immersed in the water staying in the test solution chamber 19, and the surface of the glass sensitive film 27 is in a dry state. The water quality of the electrolyzed water is measured by the electrochemical water quality measuring device 20 that is generated when the surface of the glass sensitive film 27 of the working electrode portion 28b is dried and is passed through the electrolyzed water generating device 1 next time. This solves the problem that the response of the measurement is slow when trying to do so.
[0035]
【The invention's effect】
As described above, the present invention generates alkaline water and acidic water by electrolyzing water, and distributes the generated alkaline and acidic electrolyzed water separately to the downstream of the electrolytic cell. An electrolyzed water generating device, comprising an electrochemical water quality measuring device configured to electrochemically measure at least one water quality of electrolyzed water generated in an electrolytic cell. An inlet and outlet are provided in the sample solution chamber for measuring water quality through the electrolyzed water, and the water channel between the inlet and outlet is located diagonally in the sample solution chamber and the inlet is located below the outlet. Since the inlet and outlet are arranged so as to be located, bubbles that flow into the sample solution chamber from the inlet along with water flow out of the sample outlet according to the flow of water, and the bubbles are detected even when the flow rate is small. Do not stay in the room It is possible to prevent the liquid junction that serves as a salt bridge that conducts electricity from being covered with a layer of bubbles, and to measure water quality under the influence of bubbles. It can be prevented.
[0036]
  MaTheSince the opening area of the inlet provided in the test solution chamber of the electrochemical water quality measuring device is made smaller than the opening area of the outlet, the internal pressure of the test solution chamber is maintained even when the flow rate through the test solution chamber is large. As a result, water pressure acts on the liquid junction from the side of the test solution chamber to prevent the sample water from entering, and the resistance value of the liquid junction rises and becomes asymmetric. It is possible to prevent the generation of electric potential and to prevent the measurement accuracy of water quality from being affected.
[0037]
  And claims2The invention is an electrochemical water quality measuring instrumentIs formed by providing a glass sensitive membrane in the working electrode section for measuring pH in the test solution chamber, and an inlet is provided in the test solution chamber so that its opening is above the lower end of the glass sensitive membrane.Therefore, even when the water flow is stopped, water remains in the sample solution chamber up to the height of the inlet. It is possible to prevent the surface from being dipped in the staying water and to prevent the surface from becoming dry, and to prevent the measurement responsiveness from being delayed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a schematic configuration of an example of an electrolyzed water generating apparatus.
FIG. 2 is a schematic perspective view showing an electrochemical water quality measuring device in an example of an embodiment of the present invention.
FIG. 3 is an enlarged cross-sectional view of a part of the above electrochemical water quality measuring device.
FIG. 4 is a schematic perspective view showing an electrochemical water quality measuring device according to another example of the embodiment of the present invention.
FIG. 5 is an enlarged cross-sectional view of a part of the above electrochemical water quality measuring device.
[Fig. 6]Shows electrochemical water quality measuring instrument and control systemFIG.
[Fig. 7]An example of an electrochemical water quality meterIt is sectional drawing.
[Fig. 8] Other example of electrochemical water quality measuring instrumentShowing cross sectionFIG.
[Figure 9] Electrochemical water quality measuring instrumentOtherIt is sectional drawing which shows an example.
FIG. 10TraditionalOf electrolyzed water generatorOutline showing an exampleIt is sectional drawing.
[Explanation of symbols]
2 Electrolysis tank
19 Sample solution chamber
20 Electrochemical water quality measuring device
30 Inlet
31 Outlet

Claims (2)

Electrolyzed water generates alkaline water and acidic water, and the generated alkaline and acidic electrolyzed water flows out separately from each other. In an electrolyzed water generating device formed with an electrochemical water quality measuring device that electrochemically measures at least one water quality of the electrolyzed water, the water quality is measured through the electrolyzed water of the electrochemical water quality measuring device. An inlet and an outlet are provided in the aqueous solution chamber, and the inlet and the outlet are located so that the water channel between the inlet and the outlet is located diagonally in the test solution chamber and the inlet is located below the outlet. An electrolyzed water generating apparatus characterized in that an outlet is arranged and an opening area of an inlet is formed smaller than an opening area of the outlet . An electrochemical water quality measuring instrument is formed by providing a glass sensitive membrane in the working electrode section for measuring pH in the test solution chamber, and the inlet of the test solution chamber is located above the lower end of the glass sensitive membrane. electrolytic water generation apparatus according to claim 1, characterized by comprising providing to be.

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