JP2017159275A - Bubble unit and electrolytic water generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a dissolved hydrogen concentration in hydrogen water.SOLUTION: A bubble unit 80 used by being provided on a channel through which hydrogen water containing dissolved hydrogen flows includes an approximately truncated cone-shaped nozzle part 81 having an inner diameter reduced gradually along a flowing direction of the hydrogen water, and an approximately cylindrical-shaped tubular part 82 connected to the outlet side of the nozzle part 81, and having an inner diameter larger than an opening diameter on the outlet side of the nozzle part 81.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a bubble unit for improving the dissolved hydrogen concentration of hydrogen water, and an electrolyzed water generating apparatus using the bubble unit.

  There is known an electrolyzed water generating device including an electrolyzer capable of continuously taking electrolyzed water. As an example, the electrolytic cell is partitioned and formed through a diaphragm into an anode chamber in which a positive electrode is provided to generate acidic water and a cathode chamber in which a negative electrode is provided to generate alkaline water. There are water pipes connected to the chamber and the cathode chamber to allow raw water to flow in, and acid water and alkaline water can be taken from the water intake pipes connected to each chamber. With such a configuration, it is possible to continuously take in acidic water and alkaline water by passing water between the positive electrode and the negative electrode. Alkaline water, which is considered particularly healthy, is used for drinking. Become.

  Moreover, since there is a report that it is good for health if water containing dissolved hydrogen (hydrogen water) is drunk, an electrolyzed water generator capable of taking alkaline water with a high dissolved hydrogen concentration is desired. Since there is more dissolved hydrogen in stronger alkaline water, an attempt to secure a larger amount of dissolved hydrogen increases the pH value, making it impossible to obtain alkaline water having a pH of less than 10 suitable for drinking. For this reason, Patent Document 1 proposes an electrolyzed water generating apparatus capable of taking water in which the generated alkaline water is mixed with raw water and the dissolved hydrogen concentration is increased at a pH of less than 10.

JP 2009-160503 A

  However, in the electrolyzed water generating apparatus described in Patent Document 1, since the generated alkaline water is mixed with raw water, even dissolved hydrogen is diluted together with hydroxide ions, and there is still room for improvement. It was.

  The present application discloses a technique for improving the dissolved hydrogen concentration of hydrogen water.

  The bubble unit in an embodiment of the present application is a bubble unit that is used by being provided in a flow path through which hydrogen water in which hydrogen is dissolved, and a nozzle portion having a substantially truncated cone shape whose inner diameter is reduced in the direction in which hydrogen water flows; A substantially cylindrical tubular part connected to the outlet side of the nozzle part and having an inner diameter larger than the opening diameter on the outlet side of the nozzle part.

  According to the present disclosure, when hydrogen water passes through the nozzle portion, the bubble diameter of hydrogen that is not dissolved in the hydrogen water is reduced by being sheared by the shearing force at the neck portion that is the connection portion between the nozzle portion and the tubular portion. As a result, the dissolved concentration of hydrogen increases, and when hydrogen water flows inside the tubular portion having an inner diameter larger than the opening diameter on the outlet side of the nozzle portion, a circulation flow of hydrogen water occurs inside the tubular portion, The dissolution of undissolved hydrogen is promoted, and the dissolved concentration of hydrogen is improved.

Drawing 1 is a figure showing the composition of the electrolyzed water generating device in one embodiment. FIG. 2 is a diagram illustrating an example of the configuration of the bubble unit. FIG. 3 is a diagram for explaining the operational effect of providing the bubble unit. FIG. 4 is a diagram illustrating a difference in the amount of dissolved hydrogen contained in alkaline water generated by electrolysis in the configurations of Examples 1 to 28 and Comparative Examples 1 to 3. FIG. 5 is a diagram illustrating the configuration of the bubble unit according to the first embodiment. FIG. 6 is a diagram illustrating the configuration of the bubble unit of the third embodiment. FIG. 7 is a diagram illustrating a configuration of a venturi tube used in Comparative Examples 2 to 4. FIG. 8 is a graph in which the ratio D2 / D1 of the outlet diameter D2 of the tubular portion to the opening diameter D1 of the neck portion is plotted on the horizontal axis and the dissolved hydrogen concentration is plotted on the vertical axis based on the data of Examples 1, 4 to 10. It is. FIG. 9 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when D2 / D1 is 1.5. FIG. 10 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when D2 / D1 is 4. FIG. 11 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when D2 / D1 is 300. FIG. 12 is a graph in which the taper angle θ of the inner diameter of the nozzle portion is plotted on the horizontal axis and the dissolved hydrogen concentration is plotted on the vertical axis based on the data of Examples 1, 11-17. FIG. 13 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when the taper angle θ of the inner diameter of the nozzle portion is 1.5 °. FIG. 14 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when the taper angle θ of the inner diameter of the nozzle portion is 85 °. FIG. 15 is a graph in which the ratio ve / D2 of the outlet flow velocity ve of the tubular portion to the outlet diameter D2 of the tubular portion is plotted on the horizontal axis and the dissolved hydrogen concentration is plotted on the vertical axis based on the data of Examples 18-22. . FIG. 16 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when ve / D2 is 0.59. FIG. 17 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when ve / D2 is 1000. FIG. 18 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when ve / D2 is 3000. FIG. 19 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when ve / D2 is 5900. FIG. 20 is a graph in which the length of the tubular portion is plotted on the horizontal axis and the dissolved hydrogen concentration is plotted on the vertical axis based on the data of Examples 1, 23 to 28. FIG. 21 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when the length of the tubular portion is 4 mm. FIG. 22 is a simulation result showing the flow of alkaline water flowing through the tubular portion of the bubble unit when the length of the tubular portion is 404 mm.

  The bubble unit according to an embodiment of the present invention is a bubble unit that is used in a flow path through which hydrogen water in which hydrogen is dissolved flows, and has a substantially truncated cone-shaped nozzle portion whose inner diameter is reduced in the direction in which hydrogen water flows. A substantially cylindrical tubular portion connected to the outlet side of the nozzle portion and having an inner diameter larger than the opening diameter on the outlet side of the nozzle portion (first configuration).

  According to the first configuration, when hydrogen water passes through the nozzle portion, the bubble diameter of hydrogen that is not dissolved in the hydrogen water is divided by the shearing force in the neck that is the connection portion between the nozzle portion and the tubular portion. When the hydrogen water flows through the tubular part whose inner diameter is larger than the opening diameter on the outlet side of the nozzle part, the hydrogen water circulates inside the tubular part. The dissolution of undissolved hydrogen is promoted, and the dissolved concentration of hydrogen is improved.

  In the first configuration, the ratio D2 / D1 of the inner diameter D2 of the tubular portion to the opening diameter D1 on the outlet side of the nozzle portion can be 1.5 or more and 20 or less (second configuration).

  According to the second configuration, the dissolved hydrogen concentration of the hydrogen water can be further improved.

  1st or 2nd structure WHEREIN: The taper angle of the internal diameter of the said nozzle part can be 3 degrees or more and 80 degrees or less (3rd structure).

  According to the third configuration, the dissolved hydrogen concentration of the hydrogen water can be further improved.

  In any one of the first to third configurations, if the outlet flow velocity when hydrogen water flows through the tubular portion is ve, the ratio ve / D2 of the outlet flow velocity ve to the inner diameter D2 of the tubular portion is 1.5 or more. 3000 or less (fourth configuration).

  According to the fourth configuration, the dissolved hydrogen concentration of the hydrogen water can be further improved.

  In the first to fourth configurations, the length of the tubular portion in the direction in which hydrogen water flows can be a length equal to or greater than the inner diameter D2 of the tubular portion (fifth configuration).

  According to the 5th structure, the dissolved hydrogen concentration of hydrogen water can further be improved.

  An electrolyzed water generating device according to a sixth configuration includes an anode chamber having an anode and a cathode chamber having a cathode, and electrolyzes water supplied to the anode chamber and the cathode chamber to thereby generate hydrogen water in the cathode chamber. , An intake channel for taking in hydrogen water generated by the electrolysis unit, and any one of first to fifth bubble units provided in the intake channel.

  According to the electrolyzed water generating apparatus in the sixth configuration, hydrogen water having a high dissolved hydrogen concentration can be generated.

[Embodiment]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated. In addition, in order to make the explanation easy to understand, in the drawings referred to below, the configuration is shown in a simplified or schematic manner, or some components are omitted. Further, the dimensional ratio between the constituent members shown in each drawing does not necessarily indicate an actual dimensional ratio.

  FIG. 1 is a diagram illustrating a configuration of an electrolyzed water generating apparatus 100 according to an embodiment. The electrolyzed water generating apparatus 100 includes an electrolysis unit 2, a water purification unit 3, an addition unit 4, a control unit 5, and a bubble unit 80. The electrolysis unit 2, the water purification unit 3, the addition unit 4, and the control unit 5 are accommodated in a substantially box-shaped casing 20.

  The electrolysis unit 2 is composed of an electrolytic cell 1 and a flow channel pipe disposed around the electrolytic cell 1.

  Raw water (tap water) is supplied to the electrolytic cell 1 from a water pipe 30 through a water tap 31. The raw water is neutral water having a pH of about 7. However, the raw water supplied to the electrolytic cell 1 is not limited to tap water as long as it is drinkable water having a pH of about 6 to 8 that is not subjected to extreme pH adjustment. A branch tap 32 is disposed in the water tap 31. The branch plug 32 is connected to one of the water supply hoses 33, and the other of the water supply hoses 33 is connected to the inlet of the water purification unit 3.

  The water purification unit 3 has a function of purifying raw water (tap water) supplied from the water pipe 30. Specifically, the water purification unit 3 has a porous member such as activated carbon, thereby functioning as an adsorbing unit that adsorbs impurities contained in raw water (tap water) supplied from the water pipe 30. Moreover, the water purifier 3 functions as a filtering means that includes a relatively coarse filter such as a metal mesh, cloth material, filter paper, and the like, and a hollow fiber membrane that can remove even germs.

  The outlet of the water purification unit 3 is connected to the inlet of the flow sensor 51. The flow sensor 51 is configured to be able to measure the amount of flowing water. For example, the flow sensor 51 includes a propeller at the center thereof, and measures the amount of flowing water based on the number of rotations of the propeller. The outlet of the flow sensor 51 is connected to the inlet of the addition unit 4.

  The addition unit 4 contains a calcium agent for adding calcium to the purified water after purification by the water purification unit 3. The calcium agent contains calcium lactate, calcium glycerophosphate, etc., and makes the calcium agent elution easily by bringing purified water into contact with the calcium agent and eluting calcium.

  The outlet of the addition unit 4 is connected to the main raw water supply path 24. The main raw water supply path 24 branches into a secondary raw water supply path 24a and a secondary raw water supply path 24b in the middle. The secondary raw water supply path 24a is connected to the inlets of the first electrolysis chamber 25 and the fourth electrolysis chamber 28 of the electrolytic cell 1 described later, and the secondary raw water supply path 24b is the second electrolysis of the electrolytic cell 1 described later. The inlet of the chamber 26 and the third electrolysis chamber 27 is connected.

  The electrolytic cell 1 is provided with an anode and a cathode, and the raw water in the electrolytic cell 1 is electrolyzed by applying a voltage between the anode and the cathode. When the raw water is electrolyzed, acidic water is generated from the anode side, oxygen is generated, alkaline water is generated from the cathode side, and hydrogen is generated.

  The electrolytic cell 1 includes a first electrode plate 21 located at the center, and a second electrode plate 22 and a third electrode plate 23 located so as to sandwich the first electrode plate 21. As the first electrode plate 21, the second electrode plate 22, and the third electrode plate 23, for example, platinum-coated titanium whose titanium surface is covered with platinum can be used.

  A diaphragm 12 is disposed between the first electrode plate 21 and the second electrode plate 22 and between the first electrode plate 21 and the third electrode plate 23. In the electrolytic cell 1, the first electrode plate 21, the second electrode plate 22, the third electrode plate 23, and the diaphragm 12, a first electrolysis chamber 25, a second electrolysis chamber 26, a third electrolysis chamber are provided. A chamber 27 and a fourth electrolysis chamber 28 are defined.

  The second electrode plate 22 and the third electrode plate 23 are supplied with electric power from a power supply circuit (not shown) provided in the control unit 5 disposed in the casing 20 and have the same polarity of the cathode or the anode. On the other hand, the first electrode plate 21 is an electrode plate having a polarity opposite to that of the second electrode plate 22 and the third electrode plate 23.

  Here, the second electrode plate 22 and the third electrode plate 23 are used as cathodes, and the first electrode plate 21 is used as an anode. Accordingly, the first electrolysis chamber 25 and the fourth electrolysis chamber 28 become cathode chambers to generate alkaline water (electrolytic hydrogen water), and the second electrolysis chamber 26 and the third electrolysis chamber 27 become anode chambers. Acid water is generated. That is, the first electrolysis chamber 25 and the fourth electrolysis chamber 28 are alkaline water generation chambers, and the second electrolysis chamber 26 and the third electrolysis chamber 27 are acid water generation chambers.

  Each electrolysis chamber 25, 26, 27, 28 is provided with an inflow port and an outflow port for water. The flow paths communicating with the outlets of the first electrolysis chamber 25 and the fourth electrolysis chamber 28 merge with each other to form the intake channel 17. From the intake channel 17, alkaline water having a desired pH can be taken. On the other hand, the flow paths communicating with the outlets of the second electrolysis chamber 26 and the third electrolysis chamber 27 merge together to form the drainage channel 18. Acidic water flowing through the drainage channel 18 can be drained via the solenoid valve 50.

  The solenoid valve 50 is provided in the middle of the drainage channel 18 and adjusts the flow rate of acidic water drained from the discharge port 52. In the example shown in FIG. 1, the electromagnetic valve 50 is provided in the vicinity of the discharge port 52.

  The polarities of the first electrode plate 21, the second electrode plate 22, and the third electrode plate 23 can be reversed. When the polarity is reversed, the second electrode plate 22 and the third electrode plate 23 are anodes, and the first electrode plate 21 is a cathode, so that the first electrolysis chamber 25 and the fourth electrolysis chamber 28 are The anode chamber (acidic water generation chamber) becomes the second electrolysis chamber 26 and the third electrolysis chamber 27 becomes the cathode chamber (alkaline water generation chamber). In this case, acidic water is taken from the intake channel 17, and alkaline water is drained from the drain channel 18.

  The secondary raw water supply path 24 b described above is connected to the drainage path 18 via a check valve 53. The check valve 53 always has a role of stopping the flow of water from the drainage channel 18 toward the auxiliary raw water supply channel 24b. When there is a water pressure at the time of water flow, the check valve 53 also stops the flow of water from the secondary raw water supply path 24b toward the drainage channel 18, and when there is no water pressure at the time of water flow, each electrolysis chamber 25 , 26, 27, 28 and the water accumulated in each flow path is controlled to flow to the drainage channel 18.

  In the present embodiment, the flow rate of water flowing into the first electrolysis chamber 25 and the fourth electrolysis chamber 28 via the secondary raw water supply path 24a, and the second electrolysis chamber 26 and the third electrolysis flow via the secondary raw water supply path 24b. The flow rate of water flowing into the electrolysis chamber 27 is set to 19: 1. However, the flow ratio is not limited to 19: 1.

  The bubble unit 80 is arranged in the middle of the intake channel 17. The bubble unit 80 is for improving the dissolved hydrogen concentration of alkaline water (electrolytic hydrogen water) flowing through the intake channel.

  FIG. 2 is a diagram illustrating an example of the configuration of the bubble unit 80. The bubble unit 80 includes a nozzle part 81 and a tubular part 82.

  The nozzle portion 81 has a truncated cone shape whose inner diameter decreases in the direction in which alkaline water flows. However, the nozzle portion 81 may have a configuration in which the inner diameter decreases in the direction in which the alkaline water flows. For example, the cross section in the direction perpendicular to the flow path may be an ellipse. That is, a configuration in which the inner diameter is reduced in the direction in which the alkaline water flows and the cross section in the direction perpendicular to the flow path has an elliptical shape can be said to be a substantially truncated cone shape.

  The tubular portion 82 is connected to the outlet side of the nozzle portion 81 and has a cylindrical shape. More specifically, the tubular portion 82 and the nozzle portion 81 are connected so that the center positions of the cross sections in the direction perpendicular to the flow path substantially coincide. The exit side of the nozzle part 81 is an exit side in the direction in which alkaline water flows. The inner diameter of the tubular portion 82 is substantially the same at any position in the flow path and is at least larger than the opening diameter on the outlet side of the nozzle portion 81. However, the tubular portion 82 may have a structure in which a circulating flow is generated when alkaline water is flowing, as described later. Therefore, for example, a structure in which a circulating flow is generated when alkaline water is flowing and the cross section of the cut surface in the direction perpendicular to the flow path has an elliptical shape can be said to be a substantially cylindrical shape.

  FIG. 3 is a diagram for explaining the operational effect of providing the bubble unit 80. Here, the connection part of the nozzle part 81 and the tubular part 82 is called a neck part. Of the inner diameters of the flow paths of the bubble unit 80, the inner diameter at the neck is the smallest. When alkaline water passes through the neck having a small inner diameter, the bubble diameter of hydrogen not dissolved in alkaline water is reduced, and the dissolution of hydrogen is promoted.

  In FIG. 3, the flow of alkaline water is indicated by a solid line. Also, the white circles in FIG. 3 schematically represent hydrogen bubbles that are not dissolved in alkaline water.

  As described above, the tubular portion 82 has a cylindrical shape whose inner diameter is larger than the opening diameter on the outlet side of the nozzle portion 81, that is, the opening diameter of the neck portion. For this reason, as shown in FIG. 3, the alkaline water that has flowed into the tubular portion 82 from the nozzle portion 81 first flows through the central portion in the inner diameter direction of the tubular portion 82, but then gradually spreads to the inside of the tubular portion 82. It flows through the whole. For this reason, the region 330 shown in FIG. 3 is a stagnation part in which alkaline water hardly flows unlike the central portion in the inner diameter direction in which alkaline water flows. In the stagnation part 330, a circulating flow as shown by an arrow 331 in FIG. 3 is generated. Due to the circulation flow, concentration diffusion, and the like, hydrogen bubbles contained in the alkaline water flowing through the central portion of the tubular portion 82 move to the stagnation portion 330, and dissolution of undissolved hydrogen is promoted. It is considered that this is because hydrogen bubbles move to the stagnation part 330 to contact alkaline water having a low dissolved concentration, or the gas-liquid contact time becomes long.

  In the initial state before electrolysis, the tubular portion 82 is preferably filled with water to some extent. If the tubular portion 82 is filled with water to some extent in the initial state, the generated alkaline water flows through the tubular portion 82, so that the tubular portion 82 is easily filled with alkaline water, as described above. As a result, an alkaline water circulation flow is generated and the dissolved hydrogen concentration can be improved. For this purpose, for example, a baffle plate for blocking water may be provided at the outlet side end of the tubular portion 82, or the outlet side of the tubular portion 82 may be lifted up. Further, an upward L-shaped tube may be directly connected to the outlet side end of the tubular portion 82, or a liquid pool may be provided downstream of the tubular portion 82.

  The control part 5 is provided with the control circuit which controls various functions of the electrolyzed water generating apparatus 100 in this embodiment. The controller 5 is electrically connected to the electromagnetic valve 50, the flow sensor 51, the check valve 53, the first electrode plate 21, the second electrode plate 22, and the third electrode plate 23. The flow sensor 51 outputs the detected electrical signal to the control unit 5, and the control unit 5 obtains the water flow rate based on the electrical signal received from the flow sensor 51.

  The control unit 5 applies a voltage to the first electrode plate 21, the second electrode plate 22, and the third electrode plate 23 based on a control signal input by a user's panel operation. The panel operation performed by the user refers to an operation of an operation panel (not shown) disposed on the surface of the casing 20 of the electrolyzed water generating apparatus 100.

  The operation panel includes, for example, a power button, an ORP display button, a water flow rate display button, a strong alkaline water supply button, an alkaline water supply button provided for each level from weak alkali to strong alkali, purified water supply button, acidic water supply A button, a sanitary water (strongly acidic water) supply button, a life setting button, a reset button, and the like are provided. The operation panel is also provided with a display unit such as a 7-segment LED that displays information such as pH value, ORP value, and water flow rate.

  In the electrolyzed water generating apparatus 100 according to the present embodiment, an alkaline water generating mode for supplying alkaline water, a purified water mode for supplying purified water, an acidic water generating mode for supplying acidic water, and a sanitary water generating system for supplying sanitary water are roughly divided. There are four generation modes of mode.

  The power button is a button for starting the electrolyzed water generating apparatus 100, and is an effective button in any state. However, when processing such as drainage is in progress when the power button is pressed, it is preferable that the power is turned off after the processing is completed.

  The ORP display button is a button for displaying the current ORP (redox potential) of water on the 7-segment LED. The water flow rate display button is a button for displaying the current water flow rate on the 7-segment LED.

  The alkaline water generation mode includes a strong alkaline water generation mode, a first level alkaline water generation mode, a second level alkaline water generation mode, and a third level alkaline water generation mode in the order of strong alkalinity. In the alkaline water generation mode, the second electrode plate 22 and the third electrode plate 23 are set as cathodes and the first electrode plate 21 is set as an anode under the control of the control unit 5 with the electromagnetic valve 50 opened.

  The strong alkaline water supply button is a button for instructing the electrolyzed water generating apparatus 100 to generate strong alkaline water. Strong alkaline water, for example, has a pH of 10.5, and can be used for boiled food, acupuncture, boiled vegetables, and the like.

  The first level alkaline water supply button is a button for instructing the electrolyzed water generating apparatus 100 to generate the first level alkaline water. The first level alkaline water has a pH of 9.5, for example, and can be used for cooking, tea and the like. The second level alkaline water supply button is a button for instructing the electrolyzed water generating apparatus 100 to generate the second level alkaline water. The second level alkaline water has a pH of 9.0, for example, and can be used for cooking rice or the like. The third level alkaline water supply button is a button for instructing the electrolyzed water generating apparatus 100 to generate the third level alkaline water. The third level alkaline water has a pH of 8.5, for example, and can be used as drinking water when starting to drink alkaline water.

  The control unit 5 has a relationship between the levels (first to third levels) of the alkaline water generation mode and applied voltages to the first electrode plate 21, the second electrode plate 22, and the third electrode plate 23. Is stored. The applied voltage is higher in the order of the first level, the second level, and the third level. The higher the applied voltage, the lower the pH of the generated alkaline water and the greater the amount of dissolved hydrogen.

  The purified water supply button is a button for instructing the electrolyzed water generating apparatus 100 to pass water from tap water as it is without generating ionic water. In the water purification mode, no voltage is applied to any of the first electrode plate 21, the second electrode plate 22, and the third electrode plate 23 with the electromagnetic valve 50 closed. In addition, it can prevent that water is discharged | emitted from the discharge port 52 by closing the solenoid valve 50. FIG.

  The acidic water supply button is a button for instructing the electrolyzed water generating apparatus 100 to generate acidic water. Acidic water has a pH of 5.5, for example, and can be used for face washing, boiled noodles, tea astringents, and the like. In the acidic water generation mode, the second electrode plate 22 and the third electrode plate 23 are used as the anode and the first electrode plate 21 is used as the cathode under the control of the control unit 5, contrary to the alkaline water generation mode. As a result, acidic water is taken from the intake channel 17, and alkaline water is drained from the drain channel 18.

  The sanitized water supply button is a button for instructing the electrolyzed water generating apparatus 100 to generate sanitized water. Sanitized water has a pH of 2.5, for example.

  The life setting button is a button for setting a life corresponding to the type of cartridge used in the water purification unit 3. For example, when the cartridge used in the water purification unit 3 is replaced with a cartridge different from the cartridge that has been used, the user sets the life by pressing the life setting button. As a result, when the replacement time of the cartridge is approaching, a display informing that the cartridge should be replaced can be displayed on a display unit such as a 7-segment LED.

  The electrolyzed water generating apparatus 100 has a function of integrating the water flow rate and measuring the integrated water flow rate. The reset button is a button for resetting the accumulated water flow rate. When the reset button is pressed, an integrated water flow amount counter (not shown) in the control unit 5 is cleared. It should be noted that the reset button is activated by long-pressing for 2 seconds in order to prevent the accumulated water flow rate from being reset accidentally. It is assumed that the reset button is pressed by the user when the cartridge of the water purification unit 3 is replaced.

  Strong alkaline water supply button, 1st level alkaline water supply button, 2nd level alkaline water supply button, 3rd level alkaline water supply button, purified water supply button, acidic water supply button, sanitary water supply button by user When pressed, the pressed button is lit and the user can visually recognize the type of water supplied from the electrolyzed water generating device 100. In addition, a temperature increase lamp for notifying the user when a temperature increase in the electrolytic cell 1 occurs is also provided on the operation panel.

[Example]
FIG. 4 is a diagram showing the difference in dissolved concentration of hydrogen contained in alkaline water generated by electrolysis in the configurations of Examples 1 to 28 and Comparative Examples 1 to 3 described below. is there. In FIG. 4, in addition to the dissolved concentration (ppm) of hydrogen, the inlet diameter D0 (m) of the nozzle part 81, the opening diameter D1 (m) of the neck part, the outlet diameter (inner diameter) D2 (m) of the tubular part 82, The taper angle θ (°) of the inner diameter of the nozzle portion 81, the length of the tubular portion 82 (m), the inlet flow velocity (m / s) of the nozzle portion 81, the flow velocity of the neck portion (m / s), and the outlet of the tubular portion 82 Also shown are the flow velocity ve (m / s), the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the opening diameter D1 of the neck, and the ratio ve / D2 of the outlet flow velocity ve of the tubular portion 82 to the outlet diameter D2 of the tubular portion 82. ing.

[Example 1]
FIG. 5 is a diagram illustrating a configuration of the bubble unit 80 according to the first embodiment. In the bubble unit 80 of the first embodiment, the inlet diameter D0 of the nozzle portion 81 is 10 mm, the opening diameter D1 of the neck portion is 2.5 mm, the outlet diameter D2 of the tubular portion 82 is 10 mm, and the taper angle of the inner diameter of the nozzle portion 81 is 17. ° The length of the tubular part 82 is 49 mm. When the inlet flow velocity of the nozzle portion 81 was 0.59 m / s, the flow velocity of the neck portion was 9.44 m / s, and the outlet flow velocity of the tubular portion 82 was 0.59 m / s. In this case, the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the opening diameter D1 of the neck portion is 4.0, and the ratio ve / D2 of the outlet flow velocity ve of the tubular portion 82 to the outlet diameter D2 of the tubular portion 82 is 59. The dissolved hydrogen concentration in this case was 0.318 ppm.

[Example 2]
The bubble unit 80 of the second embodiment has a configuration in which a baffle plate is provided at the end of the tubular portion 82 with respect to the bubble unit 80 of the first embodiment. The baffle plate is a plate for filling the tubular portion 82 with water to some extent in an initial state where water electrolysis is not performed. The flow rate of the alkaline water flowing through the nozzle part 81 and the tubular part 82 was the same as in Example 1. The dissolved hydrogen concentration in this case was 0.323 ppm.

[Example 3]
FIG. 6 is a diagram illustrating a configuration of the bubble unit 80 according to the third embodiment. In the bubble unit 80 of Example 3, the inlet diameter D0 of the nozzle part 81 is 10 mm, the opening diameter D1 of the neck part is 1.6 mm, the outlet diameter D2 of the tubular part 82 is 10 mm, and the taper angle of the inner diameter of the nozzle part 81 is 17. ° The length of the tubular part 82 is 49 mm. The inlet flow velocity of the nozzle portion 81 was 0.59 m / s, the flow velocity of the neck portion was 20.42 m / s, and the outlet flow velocity of the tubular portion 82 was 0.59 m / s. The dissolved hydrogen concentration in this case was 0.326 ppm.

[Example 4]
The configuration of the fourth embodiment is obtained by changing the size of the outlet diameter D2 of the tubular portion 82 with respect to the configuration of the first embodiment. That is, in Example 4, the exit diameter D2 of the tubular portion 82 was 3 mm. In this case, the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the neck opening diameter D1 is 1.2. The dissolved hydrogen concentration in this case was 0.255 ppm.

[Example 5]
The configuration of the fifth embodiment is obtained by changing the size of the outlet diameter D2 of the tubular portion 82 with respect to the configuration of the first embodiment. That is, in Example 5, the outlet diameter D2 of the tubular portion 82 was 3.75 mm. In this case, the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the opening diameter D1 of the neck is 1.5. The dissolved hydrogen concentration in this case was 0.29 ppm.

[Example 6]
The configuration of the sixth embodiment is obtained by changing the size of the outlet diameter D2 of the tubular portion 82 from the configuration of the first embodiment. That is, in Example 6, the exit diameter D2 of the tubular portion 82 was 5 mm. In this case, the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the opening diameter D1 of the neck is 2.0. The dissolved hydrogen concentration in this case was 0.308 ppm.

[Example 7]
The configuration of the seventh embodiment is obtained by changing the size of the outlet diameter D2 of the tubular portion 82 from the configuration of the first embodiment. That is, in Example 7, the exit diameter D2 of the tubular portion 82 was 15 mm. In this case, the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the neck opening diameter D1 is 6.0. The dissolved hydrogen concentration in this case was 0.308 ppm.

[Example 8]
The configuration of the eighth embodiment is obtained by changing the size of the outlet diameter D2 of the tubular portion 82 with respect to the configuration of the first embodiment. That is, in Example 8, the exit diameter D2 of the tubular portion 82 was 37.5 mm. In this case, the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the opening diameter D1 of the neck is 15. The dissolved hydrogen concentration in this case was 0.29 ppm.

[Example 9]
The configuration of the ninth embodiment is obtained by changing the size of the outlet diameter D2 of the tubular portion 82 with respect to the configuration of the first embodiment. That is, in Example 9, the outlet diameter D2 of the tubular portion 82 was 50 mm. In this case, the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the opening diameter D1 of the neck is 20. The dissolved hydrogen concentration in this case was 0.28 ppm.

[Example 10]
The configuration of the tenth embodiment is obtained by changing the size of the outlet diameter D2 of the tubular portion 82 with respect to the configuration of the first embodiment. That is, in Example 10, the outlet diameter D2 of the tubular portion 82 was 75 mm. In this case, the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the opening diameter D1 of the neck is 30. The dissolved hydrogen concentration in this case was 0.23 ppm.

[Example 11]
In the configuration of the eleventh embodiment, the taper angle θ of the inner diameter of the nozzle portion 81 is changed from the configuration of the first embodiment. That is, in Example 11, the taper angle θ of the inner diameter of the nozzle portion 81 was 1 °. The dissolved hydrogen concentration in this case was 0.25 ppm.

[Example 12]
The configuration of the twelfth embodiment is obtained by changing the taper angle θ of the inner diameter of the nozzle portion 81 with respect to the configuration of the first embodiment. That is, in Example 12, the taper angle θ of the inner diameter of the nozzle portion 81 was 3 °. The dissolved hydrogen concentration in this case was 0.29 ppm.

[Example 13]
The configuration of the thirteenth embodiment is different from the configuration of the first embodiment in that the taper angle θ of the inner diameter of the nozzle portion 81 is changed. That is, in Example 13, the taper angle θ of the inner diameter of the nozzle portion 81 was 7 °. The dissolved hydrogen concentration in this case was 0.30 ppm.

[Example 14]
The configuration of the fourteenth embodiment is different from the configuration of the first embodiment in that the taper angle θ of the inner diameter of the nozzle portion 81 is changed. That is, in Example 14, the taper angle θ of the inner diameter of the nozzle portion 81 was 31 °. The dissolved hydrogen concentration in this case was 0.305 ppm.

[Example 15]
The configuration of the fifteenth embodiment is obtained by changing the taper angle θ of the inner diameter of the nozzle portion 81 with respect to the configuration of the first embodiment. That is, in Example 15, the taper angle θ of the inner diameter of the nozzle portion 81 was 60 °. The dissolved hydrogen concentration in this case was 0.29 ppm.

[Example 16]
The configuration of the sixteenth embodiment is different from the configuration of the first embodiment in that the taper angle θ of the inner diameter of the nozzle portion 81 is changed. That is, in Example 16, the taper angle θ of the inner diameter of the nozzle portion 81 was 80 °. The dissolved hydrogen concentration in this case was 0.27 ppm.

[Example 17]
The configuration of the seventeenth embodiment is different from the configuration of the first embodiment in that the taper angle θ of the inner diameter of the nozzle portion 81 is changed. That is, in Example 17, the taper angle θ of the inner diameter of the nozzle portion 81 was set to 85 °. The dissolved hydrogen concentration in this case was 0.25 ppm.

[Example 18]
The configuration of Example 18 is the same as the configuration of Example 1, but the flow rate of alkaline water flowing through the bubble unit 80 was changed. That is, in Example 18, the inlet flow velocity of the nozzle part 81 was set to 0.0059 m / s. Thereby, the flow velocity of the neck portion was 0.0944 m / s, and the outlet flow velocity of the tubular portion 82 was 0.0059 m / s. The ratio ve / D2 of the outlet flow velocity ve of the tubular portion 82 to the outlet diameter D2 of the tubular portion 82 is 0.59. The dissolved hydrogen concentration in this case was 0.23 ppm.

[Example 19]
The configuration of Example 19 is the same as that of Example 1, but the flow rate of alkaline water flowing through the bubble unit 80 was changed. That is, in Example 19, the inlet flow velocity of the nozzle part 81 was 0.015 m / s. Thereby, the flow velocity of the neck portion was 0.24 m / s, and the outlet flow velocity of the tubular portion 82 was 0.015 m / s. The ratio ve / D2 of the outlet flow velocity ve of the tubular portion 82 to the outlet diameter D2 of the tubular portion 82 is 1.5. The dissolved hydrogen concentration in this case was 0.27 ppm.

[Example 20]
The configuration of Example 20 is the same as that of Example 1, but the flow rate of alkaline water flowing through the bubble unit 80 was changed. That is, in Example 20, the inlet flow velocity of the nozzle part 81 was 0.262 m / s. As a result, the flow velocity at the neck was 4.2 m / s, and the outlet flow velocity at the tubular portion 82 was 0.262 m / s. The ratio ve / D2 of the outlet flow velocity ve of the tubular portion 82 to the outlet diameter D2 of the tubular portion 82 is 26.22. The dissolved hydrogen concentration in this case was 0.29 ppm.

[Example 21]
The configuration of Example 21 is the same as that of Example 1, but the flow rate of alkaline water flowing through the bubble unit 80 was changed. That is, in Example 21, the inlet flow velocity of the nozzle portion 81 was 0.590 m / s. As a result, the flow velocity at the neck was 9.44 m / s, and the outlet flow velocity at the tubular portion 82 was 0.590 m / s. The ratio ve / D2 of the outlet flow velocity ve of the tubular portion 82 to the outlet diameter D2 of the tubular portion 82 is 59. The dissolved hydrogen concentration in this case was 0.32 ppm.

[Example 22]
The configuration of Example 22 is the same as that of Example 1, but the flow rate of alkaline water flowing through the bubble unit 80 was changed. That is, in Example 22, the inlet flow velocity of the nozzle portion 81 was 30 m / s. Thereby, the flow velocity of the neck was 480 m / s, and the outlet flow velocity of the tubular portion 82 was 30 m / s. The ratio ve / D2 of the outlet flow velocity ve of the tubular portion 82 to the outlet diameter D2 of the tubular portion 82 is 3000. The dissolved hydrogen concentration in this case was 0.30 ppm.

  When the inlet flow velocity of the nozzle portion 81 is 59 m / s, the flow velocity of the neck portion is 944 m / s, and the outlet flow velocity of the tubular portion 82 is 59 m / s (ve / D2 = 5900), the nozzle portion 81 collapses. did.

[Example 23]
The configuration of the twenty-third embodiment is obtained by changing the length of the tubular portion 82 with respect to the configuration of the first embodiment. That is, in Example 24, the length of the tubular portion 82 was 4 mm. In this configuration, the length of the tubular portion 82 is shorter than the outlet diameter D2 (10 mm) of the tubular portion 82. The dissolved hydrogen concentration in this case was 0.23 ppm.

[Example 24]
The configuration of the twenty-fourth embodiment is obtained by changing the length of the tubular portion 82 with respect to the configuration of the first embodiment. That is, in Example 25, the length of the tubular portion 82 was set to 10 mm, which is the same length as the outlet diameter D2 of the tubular portion 82. The dissolved hydrogen concentration in this case was 0.27 ppm.

[Example 25]
The configuration of the twenty-fifth embodiment is obtained by changing the length of the tubular portion 82 with respect to the configuration of the first embodiment. That is, in Example 26, the length of the tubular portion 82 was 100 mm. The dissolved hydrogen concentration in this case was 0.319 ppm.

[Example 26]
The configuration of the twenty-sixth embodiment is obtained by changing the length of the tubular portion 82 with respect to the configuration of the first embodiment. That is, in Example 27, the length of the tubular portion 82 was 200 mm. The dissolved hydrogen concentration in this case was 0.32 ppm.

[Example 27]
The configuration of Example 27 is obtained by changing the length of the tubular portion 82 with respect to the configuration of Example 1. That is, in Example 28, the length of the tubular portion 82 was 300 mm. The dissolved hydrogen concentration in this case was 0.32 ppm.

[Example 28]
The configuration of the twenty-eighth embodiment is obtained by changing the length of the tubular portion 82 with respect to the configuration of the first embodiment. That is, in Example 28, the length of the tubular portion 82 was 400 mm. The dissolved hydrogen concentration in this case was 0.32 ppm.

[Comparative Example 1]
Comparative example 1 is an example in which the bubble unit 80 is not provided. The outlet flow velocity of the intake channel 17 corresponding to the inlet flow velocity of the nozzle part 81 of the present embodiment was set to 0.59 m / s as in the first embodiment. The dissolved hydrogen concentration in this case was 0.21 ppm.

[Comparative Example 2]
Comparative Example 2 is an example in which a Venturi tube 70 having a structure as shown in FIG. 7 is provided instead of the bubble unit 80 in the present embodiment. The venturi tube 70 shown in FIG. 7 has an inlet diameter of 10 mm, the smallest inner diameter of the neck having an opening diameter of 2.5 mm, an outlet diameter of 5 mm, the length from the inlet to the neck of the venturi 70 is 16 mm, and the neck The length from the outlet to the outlet is 100 mm, and the taper angle of the inner diameter from the inlet to the neck is 17 °. When the inlet flow velocity of the Venturi tube 70 was 0.59 m / s, the flow velocity of the neck portion was 2.36 m / s, and the outlet flow velocity of the tubular portion 82 was 0.15 m / s. The dissolved hydrogen concentration in this case was 0.255 ppm.

[Comparative Example 3]
The configuration of Comparative Example 3 is the same as that of Comparative Example 2. In Comparative Example 3, the inlet flow velocity of the venturi tube 70 was 0.0059 m / s. As a result, the neck flow velocity was 0.024 m / s, and the outlet flow velocity ve was 0.0015 m / s. The ratio ve / D2 of the outlet flow velocity ve to the outlet diameter D2 is 0.3. The dissolved hydrogen concentration in this case was 0.215 ppm.

[Comparative Example 4]
The configuration of Comparative Example 4 is the same as that of Comparative Example 2. In Comparative Example 4, the inlet flow velocity of the venturi pipe 70 was 59 m / s. Thereby, the flow velocity of the neck was 236 m / s, and the outlet flow velocity ve was 14.75 m / s. The ratio ve / D2 of the outlet flow velocity ve to the outlet diameter D2 is 2950. The dissolved hydrogen concentration in this case was 0.215 ppm.

<Dissolved hydrogen concentration when D2 / D1 is changed>
FIG. 8 shows the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the neck opening diameter D1 on the horizontal axis and the dissolved hydrogen concentration on the vertical axis based on the data of Examples 1, 4 to 10. It is a graph. When the ratio D2 / D1 of the outlet diameter D2 of the tubular portion 82 to the neck opening diameter D1 is changed in the range of 1.2 to 30, the dissolved hydrogen concentration is highest when D2 / D1 is 4 (Example 1). Value. Moreover, in any Example, the dissolved hydrogen concentration became higher than the dissolved hydrogen concentration (0.21 ppm) of the comparative example 1 which does not provide the bubble unit 80. FIG.

  9 to 11 are simulation results showing the flow of alkaline water flowing through the tubular portion 82 of the bubble unit 80 when D2 / D1 is changed. D1 is 2.5 mm, the taper angle θ of the inner diameter of the nozzle portion 81 is 17 °, the inlet flow velocity of the nozzle portion 81 is 0.59 m / s, and the flow velocity of the neck portion is 9.44 m / s. 9 shows the results when D2 / D1 is 1.5, FIG. 10 shows the results when D2 / D1 is 4, and FIG. 11 shows the results when D2 / D1 is 300, respectively.

  When D2 / D1 is 1.2 (Example 4), the dissolved hydrogen concentration (Comparative Example 2) in which the Venturi tube 70 having the structure shown in FIG. 0.255 ppm). This is because, as D2 / D1 becomes smaller, as shown in FIG. 9, the stagnation portion inside the tubular portion 82 described with reference to FIG. 3 becomes smaller, and the circulation flow of alkaline water is less likely to occur. Moreover, when D2 / D1 was 30 (Example 10), it became a value lower than the dissolved hydrogen concentration (0.255 ppm) of Comparative Example 2. As shown in FIG. 11, when D2 / D1 increases, the stagnation region becomes too wide, resistance due to the weight of the liquid present in the stagnation portion increases, and the circulation flow of alkaline water is less likely to occur. . When D2 / D1 was 1.5 or more and 20 or less, the dissolved hydrogen concentration was higher than that in Comparative Example 2.

  As mentioned above, it is preferable that ratio D2 / D1 of the exit diameter D2 of the tubular part 82 with respect to the opening diameter D1 of a neck part is 1.5-20. However, even when D2 / D1 is less than 1.5 or greater than 20, the dissolved hydrogen concentration is higher than that in the configuration without the bubble unit 80 (Comparative Example 1).

<Dissolved hydrogen concentration when the taper angle θ of the inner diameter of the nozzle portion 81 is changed>
FIG. 12 is a graph in which the taper angle θ of the inner diameter of the nozzle portion 81 is plotted on the horizontal axis and the dissolved hydrogen concentration is plotted on the vertical axis based on the data of Examples 1, 11-17. When the taper angle θ was changed in the range from 1 ° to 85 °, the dissolved hydrogen concentration reached the highest value in the case of 17 ° (Example 1). Moreover, in any Example, the dissolved hydrogen concentration became higher than the dissolved hydrogen concentration (0.21 ppm) of the comparative example 1 which does not provide the bubble unit 80. FIG.

  13 to 14 are simulation results showing the flow of alkaline water flowing through the tubular portion 82 of the bubble unit 80 when the taper angle θ of the inner diameter of the nozzle portion 81 is changed. D1 was 2.5 mm, D2 was 10 mm, the inlet flow rate of the nozzle part 81 was 0.59 m / s, and the cervical flow rate was 9.44 m / s. FIG. 13 shows the results when the taper angle θ is 1.5 °, and FIG. 14 shows the results when the taper angle θ is 85 °. FIG. 9 shows the result when the taper angle θ is 17 °.

  When the taper angle θ was 1 ° (Example 11), the dissolved hydrogen concentration was lower than that of Comparative Example 2 (0.255 ppm). This is because if the taper angle θ becomes too small, the alkaline water that has passed through the neck of the bubble unit 80 does not spread and goes straight, making it difficult for a circulating flow to occur, so that the dissolved hydrogen concentration is improved. It is thought that it becomes difficult to do. The dissolved hydrogen concentration when the taper angle θ was 85 ° (Example 17) was lower than the dissolved hydrogen concentration (0.255 ppm) of Comparative Example 2. If the taper angle θ is too large, as shown in FIG. 14, the flow of water becomes turbulent immediately after the alkaline water passes through the neck, so that the stagnation is less likely to occur and the dissolved hydrogen concentration is difficult to improve. When the taper angle θ was 3 ° or more and 80 ° or less, the dissolved hydrogen concentration was higher than that in Comparative Example 2.

  As described above, the taper angle θ of the inner diameter of the nozzle portion 81 is preferably 3 ° or more and 80 ° or less. However, even when the taper angle θ of the inner diameter of the nozzle portion 81 is smaller than 3 ° or larger than 80 °, the dissolved hydrogen concentration becomes higher compared to the configuration in which the bubble unit 80 is not provided (Comparative Example 1). .

<Dissolved hydrogen concentration when ve / D2 is changed>
FIG. 15 is a graph in which the ratio ve / D2 of the outlet flow velocity ve of the tubular portion 82 to the outlet diameter D2 of the tubular portion 82 is plotted on the horizontal axis and the dissolved hydrogen concentration is plotted on the vertical axis based on the data of Examples 18-22. It is. When ve / D2 was changed in the range from 0.59 to 5900, the dissolved hydrogen concentration reached the highest value in 59 (Example 21). Moreover, in any Example, the dissolved hydrogen concentration became higher than the dissolved hydrogen concentration (0.21 ppm) of the comparative example 1 which does not provide the bubble unit 80. FIG.

  16 to 19 are simulation results showing the flow of alkaline water flowing through the tubular portion 82 of the bubble unit 80 when ve / D2 is changed. D1 was 2.5 mm, D2 was 10 mm, and the taper angle θ of the inner diameter of the nozzle portion 81 was 17 °. 16 shows ve / D2 of 0.59 (ve = 0.005 m / s), FIG. 17 shows ve / D2 of 1000 (ve = 10 m / s), and FIG. 18 shows ve / D2 of 3000 (ve = 30 m). / S), FIG. 19 shows the results when ve / D2 is 5900 (ve = 59 m / s). FIG. 9 shows the result when ve / D2 is 59 (ve = 0.59 m / s).

  When ve / D2 was 0.59 (Example 18), the dissolved hydrogen concentration was lower than that of Comparative Example 2 (0.255 ppm). This is because if ve / D2 is too small, as shown in FIG. 16, the circulation flow of alkaline water is less likely to occur due to the attenuation of the shearing force due to the decrease in the flow velocity or the reduction of the stagnation area. Also, if ve / D2 is too large, as shown in FIG. 19, a reverse flow is generated immediately after the alkaline water passes through the neck, and the circulating flow of the alkaline water becomes difficult to occur. It may be lower than the dissolved hydrogen concentration (0.255 ppm). As shown in the graph of FIG. 15, when ve / D2 was 1.5 or more and 3000 or less, the dissolved hydrogen concentration was higher than that in Comparative Example 2.

  Therefore, ve / D2 is preferably 1.5 or more and 3000 or less. However, even when ve / D2 is smaller than 1.5 or larger than 3000, the dissolved hydrogen concentration is higher than that in the configuration in which the bubble unit 80 is not provided (Comparative Example 1).

<Dissolved hydrogen concentration when the length of the tubular portion 82 is changed>
FIG. 20 is a graph in which the length of the tubular portion 82 is plotted on the horizontal axis and the dissolved hydrogen concentration is plotted on the vertical axis based on the data of Examples 1, 23 to 28. When the length of the tubular portion 82 is changed in the range from 0.004 m to 0.4 m, the dissolved hydrogen concentration increases as the length of the tubular portion 82 increases, and the length of the tubular portion 82 becomes 0.1 m or more. As a result, the amount of dissolved hydrogen hardly changed. In this case, in any Example, the dissolved hydrogen concentration became higher than the dissolved hydrogen concentration (0.21 ppm) of the comparative example 1 which does not provide the bubble unit 80.

  21 to 22 are simulation results showing the flow of alkaline water flowing through the tubular portion 82 of the bubble unit 80 when the length of the tubular portion 82 is changed. D1 was 2.5 mm, D2 was 10 mm, and the taper angle θ of the inner diameter of the nozzle portion 81 was 17 °. FIG. 21 shows the results when the length of the tubular portion 82 is 4 mm, and FIG. 22 shows the results when the length of the tubular portion 82 is 404 mm. FIG. 9 shows the result when the length of the tubular portion 82 is 49 mm.

  When the length of the tubular portion 82 is 0.004 m shorter than the outlet diameter D2 (0.01 m) of the tubular portion 82 (Example 23), the dissolved hydrogen concentration is lower than that in the case of Comparative Example 2. It was. This is because when the length of the tubular portion 82 is too short, the alkaline water that has passed through the neck reaches the outlet before spreading to the outside in the radial direction of the tubular portion 82 as shown in FIG. This is because it becomes difficult to generate the circulating flow. In other cases, that is, when the length of the tubular portion 82 is equal to or larger than the outlet diameter D2 (0.01 m) of the tubular portion 82, the dissolved hydrogen concentration is higher than that in Comparative Example 2.

  As described above, the length of the tubular portion 82 is preferably equal to or larger than the outlet diameter D2 of the tubular portion 82. However, even if the length of the tubular portion 82 is shorter than the outlet diameter D2 of the tubular portion 82, the dissolved hydrogen concentration is higher than in the configuration in which the bubble unit 80 is not provided (Comparative Example 1).

  When the length of the tubular portion 82 is 20 times (0.2 m) or more of the outlet diameter D2 of the tubular portion 82, the amount of change in the dissolved hydrogen concentration is 0.1% or less even if the length of the tubular portion 82 changes. It became. That is, it turns out that making the length of the tubular part 82 longer than 20 times the outlet diameter D2 of the tubular part 82 is not so meaningful from the viewpoint of improving the dissolved hydrogen concentration (see FIG. 22). Therefore, it is more preferable that the length of the tubular portion 82 is not less than the outlet diameter D2 of the tubular portion 82 and not more than 20 times the outlet diameter D2 of the tubular portion 82.

  As mentioned above, embodiment mentioned above is only the illustration for implementing this invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the spirit thereof.

  For example, in the above-described embodiment, hydrogen water in which hydrogen is dissolved is generated by electrolysis of water, but the method for generating hydrogen water is not limited to electrolysis of water, and other methods may be used. . By passing hydrogen water generated by another method through the bubble unit 80 of the present embodiment, the dissolved concentration of hydrogen can be improved.

  In the above-described embodiment, the electrolyzed water generating device used for home use has been described. However, the electrolyzed water generating device according to the present invention can be used for applications other than home use such as industrial use.

  In the embodiment described above, when alkaline water generated by electrolysis is taken through the water channel 17, acidic water is drained from the drain channel 18, and when acidic water is taken through the water channel 17, The alkaline water is drained from the drainage channel 18. However, the drainage channel 18 may function as a water channel so that both alkaline water and acidic water can be taken.

  DESCRIPTION OF SYMBOLS 1 ... Electrolytic cell, 2 ... Electrolysis part, 5 ... Control part, 17 ... Intake channel, 18 ... Drainage channel, 24 ... Main raw water supply channel, 24a, 24b ... Secondary raw water supply channel, 50 ... Solenoid valve, 80 ... Bubble Unit: 81 ... Nozzle part, 82 ... Tubular part, 100 ... Electrolyzed water generator

Claims (6)

A bubble unit used in a flow path through which hydrogen water in which hydrogen is dissolved flows.
A substantially frustoconical nozzle portion whose inner diameter decreases in the direction in which hydrogen water flows;
A substantially cylindrical tubular part connected to the outlet side of the nozzle part and having an inner diameter larger than the opening diameter on the outlet side of the nozzle part;
A bubble unit. The bubble unit according to claim 1,
A ratio D2 / D1 of the inner diameter D2 of the tubular portion to the opening diameter D1 on the outlet side of the nozzle portion is 1.5 to 20 in a bubble unit. In the bubble unit according to claim 1 or 2,
The bubble unit has a taper angle of an inner diameter of the nozzle portion of 3 ° or more and 80 ° or less. In the bubble unit according to any one of claims 1 to 3,
A bubble unit in which a ratio ve / D2 of the outlet flow velocity ve to an inner diameter D2 of the tubular portion is 1.5 or more and 3000 or less, where ve is an outlet flow velocity when hydrogen water flows through the tubular portion. In the bubble unit according to any one of claims 1 to 4,
The length of the said tubular part in the direction through which hydrogen water flows is a bubble unit which is the length more than the internal diameter D2 of the said tubular part. An electrolysis section that includes an anode chamber having an anode and a cathode chamber having a cathode, and generates hydrogen water in the cathode chamber by electrolyzing water supplied to the anode chamber and the cathode chamber;
A water intake channel for taking in hydrogen water generated in the electrolysis section;
The bubble unit according to any one of claims 1 to 5 provided in the intake channel,
An electrolyzed water generating device comprising:

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