JP6682330B2 - Electrolytic hydrogen water generator and method for lowering pH of electrolytic hydrogen water - Google Patents

Description

  The present invention relates to an electrolytic hydrogen water generator and a method for lowering the pH of electrolytic hydrogen water.

  The water we consume on a daily basis plays an extremely important role as a foundation for health, and as people's health consciousness increases, attention is paid to drinking water.

  Conventionally, various types of drinking water that meet such needs have been proposed. For example, oxygen water in which a large amount of oxygen is dissolved in drinking water and hydrogen water in which hydrogen is dissolved are known. .

  In particular, various reports have been made that hydrogen water containing molecular hydrogen contributes to health such as reduction of in vivo oxidative stress and suppression of increase in blood LDL.

  Such hydrogen water is generated by dissolving hydrogen in water, and examples of the generation method include a method of bubbling hydrogen gas into drinking water, a method by a chemical reaction, and a method of electrically converting water. Examples include a method of decomposing and generating.

  Among them, the method of electrolyzing water can generate electrolyzed hydrogen water in which hydrogen is added to alkaline electrolyzed water, which is also said to be useful for health promotion, and a synergistic effect of both can be expected. (For example, refer to Patent Document 1.).

JP, 2009-160503, A

  By the way, the amount of dissolved hydrogen contained in hydrogen water is one of the most important concerns for those who drink hydrogen water. In particular, there are many drinkers who think that hydrogen water having a large amount of dissolved hydrogen is more useful for health promotion, and there is a tendency that hydrogen water having a high dissolved hydrogen concentration is required.

  In the method of electrolyzing water described above, it is possible to increase the dissolved hydrogen concentration of electrolyzed hydrogen water relatively easily by increasing the electrolysis current.

  However, when the electrolytic current is increased, more hydroxide ions are generated on the cathode side, so that the pH of the electrolytic hydrogen water also increases.

  However, the pH of the electrolyzed hydrogen water suitable for drinking is set to 10 or less, and it is necessary to decrease the pH by some means in order to increase the current and obtain electrolyzed hydrogen water having a higher dissolved hydrogen concentration. Become.

  Therefore, in order to solve such a problem, Patent Document 1 described above proposes a method of reducing the hydroxide ion concentration by bypassing and mixing raw water in the discharge line of electrolytic hydrogen water and diluting it. There is.

  However, in the above-described conventional method of mixing raw water, even dissolved hydrogen is diluted with hydroxide ions, and there is still room for improvement.

  The present invention has been made in view of such circumstances, and an electrolytic hydrogen water generator capable of suppressing an increase in pH of the electrolytic hydrogen water with almost no decrease in the dissolved hydrogen concentration of the generated electrolytic hydrogen water, And a method for lowering the pH of electrolytic hydrogen water.

  In order to solve the above-mentioned conventional problems, the electrolytic hydrogen water generator according to the present invention has (1) an anode chamber and a cathode chamber, which are partitioned by a diaphragm, and are arranged in each electrode chamber while supplying water. Electrolytic hydrogen water provided with an electrolytic cell for electrolyzing the water by energizing the electrodes through the diaphragm, and discharging alkaline electrolytic hydrogen water from the cathode chamber while discharging acidic water from the anode chamber. The generator is provided with a reflux bypass flow passage for joining part of the acidic water discharged from the electrolytic cell with the raw water supplied to the anode chamber.

Further, the electrolytic hydrogen water generator according to the present invention is also characterized by the following points.
(2) The reflux bypass flow passage supplies an acidic water branch flow passage that diverts a part of the acidic water from the middle of the drainage passage that drains the acidic water discharged from the electrolysis tank, and the raw water to the anode chamber. An acidic water reflux mixing section which is formed on the flow channel for mixing the acidic water flowing through the acidic water branch channel with the raw water.
(3) The drainage flow path is provided with a flow rate adjusting means for adjusting a flow rate of the acidic water flowing through the drainage flow path, on a downstream side of a branch portion of the acid water branching flow path.
(4) A curved flow path is provided in the middle of the drainage flow path, and a downstream of the flow path is separated from the front surface of the electrolytic cell to form a separation flow path. A parts arrangement space is formed laterally, and the flow rate adjusting means is arranged in the parts arrangement space.
(5) The drainage flow path upstream of the bent flow path is formed integrally with the casing of the electrolytic cell.
(6) The branch portion is provided in the curved flow path or in the downstream thereof to form the acidic water branch flow path as a separation flow path, and the tip end of the acidic water branch flow path is bent toward the lower part of the electrolytic cell. Then, the acidic water reflux mixing section was arranged below the lower surface of the electrolytic cell.

  Further, in the method for lowering the pH of electrolyzed hydrogen water according to the present invention, (7) it has an anode chamber and a cathode chamber partitioned by a diaphragm, and the diaphragm is provided between electrodes arranged in each electrode chamber while supplying water. The cathode in the electrolytic hydrogen water generator provided with an electrolyzer for electrolyzing the water by energizing the battery through which the alkaline electrolyzed hydrogen water is discharged from the cathode chamber while discharging the acidic water from the anode chamber. A method for lowering the pH of electrolyzed hydrogen water produced in a room, wherein a part of the acidic water discharged from the electrolyzer is returned to the anode chamber together with the raw water, and the pH of the water in the anode chamber is supplied as the raw water. When the pH is lower than the case pH, the probability that hydroxide ions present in water in the cathode chamber will undergo neutralization reaction with hydrogen ions or oxonium ions present in water in the anode chamber through the diaphragm. Improve The pH of the serial cathode chamber of water was set to reduce.

  In the electrolytic hydrogen water generator according to the present invention, since the raw water to be supplied to the anode chamber is provided with the reflux bypass flow path for joining a part of the acidic water discharged from the electrolytic cell, the generated hydrogen in the electrolytic hydrogen water is dissolved in hydrogen. It is possible to provide an electrolytic hydrogen water generator capable of suppressing an increase in pH of electrolytic hydrogen water with almost no decrease in concentration.

  Further, the reflux bypass flow passage supplies an acidic water branch flow passage for diverting a part of the acidic water from the middle of the drainage passage for discharging the acidic water discharged from the electrolysis tank, and the raw water to the anode chamber. If the acidic water reflux mixing unit that is formed on the flow channel and mixes the acidic water flowing through the acidic water branch channel with the raw water is provided, while reducing the amount of the acidic water that becomes wastewater, together with the raw water. Acidic water can be refluxed into the anode chamber.

  In addition, a curved flow path is provided in the middle of the drainage flow path, and a downstream side of the flow path is a separation flow path separated from the front of the electrolytic cell, and the front side of the front side of the electrolytic cell is the separation flow path side. By forming the parts arrangement space on one side and arranging the flow rate adjusting means in the parts arrangement space, for example, the flow rate adjusting means such as an electromagnetic valve can be compactly arranged in the vicinity of the electrolytic cell without clutter. be able to.

  Further, if the drainage flow passage on the upstream side of the bent flow passage is formed integrally with the casing of the electrolyzer, the drainage flow passage can be made more orderly, and also above the separation flow passage. It is possible to form a space for arranging various parts.

  In addition, the branch portion is provided in the bent flow path or in the downstream thereof to form the acidic water branch flow path as a separation flow path, and the tip end of the acidic water branch flow path is bent toward the lower part of the electrolytic cell. By arranging the acidic water reflux mixing section below the lower surface of the electrolytic cell, the acidic water is mixed with the raw water to be supplied to the anode chamber while the piping around the electrolytic cell is arranged in order, and the mixed water is steadily generated. Can be configured as follows.

  Further, according to the method for lowering the pH of electrolyzed hydrogen water according to the present invention, when a part of the acidic water discharged from the electrolytic cell is refluxed to the anode chamber together with the raw water, and the pH of the water in the anode chamber is supplied as the raw water. By making the pH lower than the pH of the above, the probability that the hydroxide ions present in the water in the cathode chamber neutralize with the hydrogen ions or oxonium ions present in the water in the anode chamber through the diaphragm is improved. Since the pH of the water in the cathode chamber is lowered, there is provided a method for lowering the pH of electrolyzed hydrogen water capable of suppressing an increase in pH of the electrolyzed hydrogen water with almost no decrease in the dissolved hydrogen concentration of the produced electrolyzed hydrogen water. Can be provided.

It is the conceptual diagram which showed the state of the water in the anode chamber and cathode chamber with which the electrolytic cell was equipped. It is a block diagram showing the whole electrolysis hydrogen water generator composition concerning this embodiment. It is explanatory drawing which showed the construction example of each flow-path structure arrange | positioned at the electrolytic cell and its vicinity. It is explanatory drawing which showed the left and right side surfaces of an electrolysis part. It is explanatory drawing which showed the front of the electrolysis part. It is a block diagram showing the whole electrolysis hydrogen water generator composition concerning a modification.

  The present invention has an anode chamber and a cathode chamber partitioned by a diaphragm, and electrolyzes the water by supplying electricity through the diaphragm between electrodes arranged in each electrode chamber while supplying water, An electrolytic hydrogen water generator equipped with an electrolytic cell for discharging alkaline electrolytic hydrogen water from the cathode chamber while discharging acidic water from the anode chamber, with a reduction in the dissolved hydrogen concentration of the generated electrolytic hydrogen water. The present invention provides an electrolyzed hydrogen water generator that can suppress an increase in the pH of electrolyzed hydrogen water without the need.

  In the present specification, electrolytic hydrogen water is alkaline electrolyzed water generated on the cathode side by electrolysis of water, and is water in which hydrogen gas similarly generated on the cathode side is dissolved.

  Therefore, it should be understood that the electrolytic hydrogen water generator in the present specification conceptually includes a so-called alkaline ion water conditioner.

  Further, the diaphragm that separates the anode chamber and the cathode chamber is not particularly limited as long as it is used as a diaphragm in a general alkaline ionized water device, and for example, a neutral membrane or an ion exchange membrane is adopted. be able to.

  And, the feature of the electrolytic hydrogen water generator according to the present embodiment is that the raw water supplied to the anode chamber is provided with a reflux bypass flow path for joining a part of the acidic water discharged from the electrolytic cell. .

  That is, a part of the acidic water drained in the conventional alkaline ionized water conditioner or the like is returned to the anode chamber together with the raw water in a mixed water state.

  Here, with reference to FIG. 1, a phenomenon in which the pH of the electrolytic hydrogen water discharged from the cathode chamber is lowered by the above-mentioned reflux will be described based on the mechanism currently assumed by the present inventors. FIG. 1 is a conceptual diagram showing a state of water in an anode chamber 10 and a cathode chamber 11 provided in the electrolytic cell 1.

  As shown in FIG. 1A, the anode chamber 10 and the cathode chamber 11 are partitioned by a diaphragm 12, the anode chamber 10 is provided with an anode 13, and the cathode chamber 11 is provided with a cathode 14. .

  The inside of the anode chamber 10 is filled with the mixed water in which the acidic water and the raw water are mixed by the above-mentioned reflux bypass channel, and hydrogen ions are present in the water together with water molecules. On the other hand, the cathode chamber 11 is filled with raw water and contains water molecules. Note that, although hydrogen ions are referred to here for convenience of explanation, it is possible that they actually exist as oxonium ions such as hydronium ions.

  In such a state, when electricity is applied between the anode 13 and the cathode 14 through the diaphragm 12, water molecules are electrolyzed as shown in FIG. 1B, and hydrogen ions are generated in the anode chamber 10. In the cathode chamber 11, hydroxide ions are generated.

  At this time, since hydrogen ions derived from refluxed acidic water originally exist in the anode chamber 10 in addition to hydrogen ions generated by electrolysis, mixed water is not supplied and only raw water is supplied to the anode chamber. As compared with the case where electrolysis is performed (hereinafter, referred to as a non-refluxing method), the pH is in a low pH state, that is, the state in which hydrogen ions are large.

  Since the diaphragm 12 has ion permeability, hydrogen ions in the anode chamber 10 and hydroxide ions in the cathode chamber 11 are bound to each other in the vicinity of the diaphragm 12 as shown in FIG. Water is generated. In particular, from the viewpoint of the cathode chamber 11, hydroxide ions are consumed and the pH in the cathode chamber 11 decreases.

  Moreover, since a large amount of hydrogen ions existing in the anode chamber 10 increase the chances of reaction with hydroxide ions through the diaphragm 12, the neutralization reaction that occurs near the diaphragm 12 is further promoted. As a result, the pH of the water in the cathode chamber 11 becomes lower than that in the non-reflux system.

  In addition, in parallel with such a reaction, in the cathode chamber 11, hydrogen molecules are generated and dissolved in water as shown in FIG. 1D, and electrolyzed hydrogen water in which pH rise is suppressed is discharged. Becomes

  Particularly, in order to increase the dissolved hydrogen concentration, it is possible to generate electrolyzed hydrogen water having a suppressed pH, as compared with the non-reflux system, even when a larger amount of current is applied between the electrodes.

  Although these mechanisms are not always clearly clarified, in order to provide an understanding of the present invention, those referred to as the model that can best explain the phenomenon in which electrolyzed hydrogen water of which pH is suppressed is produced. Is. The raw water for supplying the mixed water supplied to the cathode chamber 11 or the anode chamber 10 is not particularly limited as long as it is potable water of about pH 6 to 8 without extreme pH adjustment. General tap water or well water can be used instead of water.

  Further, particularly preferably as raw water, for the tap water and well water, filtration treatment by a filter or the like, adsorption treatment by a porous body such as activated carbon, deionization treatment using an ion exchange resin, water electrolysis efficiency. In order to improve it, any one or two or more selected from calcium treatment in which a calcium agent such as calcium lactate or calcium glycerophosphate is brought into contact may be used in combination.

  In addition, the reflux bypass flow path is a flow path for supplying the raw water to the anode chamber 10, and an acidic water branch flow path for diverting a part of the acidic water from the middle of the drainage flow path for discharging the acidic water discharged from the electrolytic cell 1. An acidic water reflux mixing unit that joins the raw water with the acidic water that is formed on the road and that flows through the acidic water branch passage may be provided.

  That is, the midway part of the drainage flow path of the acidic water provided on the outlet side of the anode chamber 10 is used as the base end, and the midway part of the raw water supply flow path to the anode chamber 10 provided on the entrance side of the anode chamber 10 is set. A reflux bypass passage may be provided so as to be the tip, and the tip portion of the reflux bypass passage may be used as an acidic water reflux mixing portion to mix the raw water with the acidic water to generate mixed water.

  With such a configuration, it is possible to reduce the amount of acidic water to be drained as compared with the non-refluxing method, while suppressing the rise in pH in the cathode chamber 11 as described above.

  In addition, if the reflux bypass flow passage is not provided, the raw water that has flowed into the anode chamber will be totally acidic water and will be discarded. Further, in this case, if the amount of raw water flowing into the anode chamber is reduced, the amount of acidic water to be discarded can be reduced, but the electrolysis efficiency will deteriorate.

  On the other hand, when the reflux bypass flow passage is provided, part of the acidic water discharged from the anode chamber is returned to the inlet side of the anode chamber through the bypass flow passage. That is, the acidic water that is discarded is only the remaining portion that has not flowed into the reflux bypass flow passage, and if, for example, half of the acidic water is refluxed, the amount of acidic water that is discarded can be halved. Moreover, since both the acidic water and the raw water from the reflux bypass passage flow into the anode chamber in the state of mixed water, the acidic water to be discarded while maintaining the electrolysis efficiency without reducing the amount of water flowing into the anode chamber. It is possible to reduce the amount of

  That is, the present application was made for the purpose of reducing the amount of acidic wastewater at the time of producing electrolytic hydrogen water, or both reducing the amount of acidic wastewater and producing electrolytic hydrogen water having a high hydrogen-dissolved concentration in which pH is suppressed. Therefore, it can be understood that these solutions are provided.

  It should be noted that the tip portion of the reflux bypass flow channel is not limited to the midway portion of the raw water supply flow channel to the anode chamber 10, but the raw water supply flow to the anode chamber 10 and the cathode chamber 11 on the upstream side of the raw water supply channel. It can be used as a midway part of the road. Even when the acidic water is recirculated to the midway of the raw water supply path to the anode chamber 10 and the cathode chamber 11, the pH of the water in the anode chamber 10 can be lowered, and the cathode chamber 11 The pH of the water inside can also be lowered.

  By the way, in the electrolytic hydrogen water generator A according to the present embodiment, the water supplied to the anode chamber is not limited to the refluxed acidic water, but a “part” is refluxed to mix with the raw water. It's water.

  If the acidic water generated in the electrolytic cell is not drained and only the acidic water is supplied to the anode chamber to completely reflux the acidic water, the acidic water is not drained, which is an advantageous aspect.

  However, if electrolysis is performed while all acidic water is refluxed, the acidity in the anode chamber will gradually reach its limit, and electrolysis will be difficult.

  On the other hand, in the electrolytic hydrogen water generator A according to the present embodiment, part of the acidic water discharged from the electrolytic cell is refluxed and the rest is drained.

  Therefore, when water is supplied to the anode chamber, new raw water can be added only to the drained remaining portion, and the water can be supplied in the state of mixed water.

  Therefore, together with the refluxed acidic water, fresh raw water that has not been subjected to electrolysis is always supplied to the anode chamber, so that the acidity of the water in the anode chamber does not reach a state where electrolysis is difficult. Stable and continuous production of electrolyzed hydrogen water can be performed.

  Hereinafter, the electrolytic hydrogen water generator according to the present embodiment will be specifically described with reference to the drawings. FIG. 2 is a block diagram showing the overall configuration of the electrolytic hydrogen water generator A according to the present embodiment, and FIG. 3 is an explanatory diagram showing an example of construction of the electrolytic cell 1 and each flow path structure arranged in the vicinity thereof. 4 is a left and right side view of the electrolysis section, and FIG. 5 is a front view of the electrolysis section. Note that, in FIG. 3, a part of the configuration is shown by a chain double-dashed line in order to visualize the pipes that overlap in the front and rear.

  As shown in FIG. 2, the configuration of the electrolytic hydrogen water generator A is large and includes an electrolysis unit 4 including an electrolysis tank 1 for electrolyzing raw water, and a water purification unit 5 for preliminarily purifying raw water supplied to the electrolysis tank 1. It is divided into an addition section 6 for adding a predetermined additive to the purified raw water (purified water) and a control section 7 for totally controlling each part of the electrolytic hydrogen water generator A, which are substantially box-shaped. It is housed and arranged in a molded casing 20.

  As shown in FIG. 3, the electrolysis section 4 includes an electrolytic cell 1 formed in a rectangular box shape as viewed from the outside, and a separated flow provided around the electrolytic cell 1 and separated from the surface of the electrolytic cell 1 in an overhead piping state. It is configured with a flow path piping portion 42 (generally, a portion surrounded by a dashed line in the figure) as a path.

  The electrolyzer 1 is a part that electrolyzes supplied water to generate alkaline electrolyzed hydrogen water or acidic water. The electrolytic hydrogen water generator A according to the present embodiment is a device that can take in not only alkaline electrolytic hydrogen water but also acidic water, and specifically, an electrolytic tank provided in the electrolytic hydrogen water generator A. 1, a water intake electrode chamber provided with an electrode plate (hereinafter referred to as a water intake electrode plate) capable of switching to a predetermined polarity for generating water for a user to take water, and a polarity opposite to the polarity of the water intake electrode plate. A by-product water electrode chamber provided with an electrode plate (hereinafter, referred to as a by-product water electrode plate) that is controlled to be switched is formed by separating a diaphragm, and the by-product water electrode plate is used as an anode for the by-product water. While making the water intake electrode chamber the anode chamber, by using the water intake electrode plate as the cathode and making the water intake electrode chamber the cathode chamber, it is possible to generate alkaline electrolyzed hydrogen water in the water intake electrode chamber and make it possible to take water. Conversely, while the by-product water electrode plate is the cathode and the by-product water electrode chamber is the cathode chamber, Water electrode plate in the anode water intake electrode chamber by an anode compartment, to generate the acidic water is made possible intake in intake for the electrolysis chamber. In the following, in order to facilitate understanding of the present invention, a state in which alkaline electrolyzed hydrogen water can be taken (alkaline water generation mode described later) is used as a reference, a water intake electrode chamber is a cathode chamber, and a water intake electrode plate is a cathode, It is assumed that the electrode chamber for by-produced water is the anode chamber and the electrode plate for the by-produced water is the anode, and the description will be given by giving names to the respective components.

  Returning to the description of FIG. 3, on the lower surface side of the electrolytic cell 1, an anode chamber water supply port 43a for supplying water into an anode chamber (electrode chamber for byproduct water) formed in the electrolytic cell 1 and a cathode A cathode chamber water supply port 43b for supplying water (raw water) is formed in the chamber (water intake electrode chamber).

  Further, an electrolytic hydrogen water discharge port 17a is provided so as to project upward at a substantially central portion of the upper end surface of the electrolytic cell 1, so that electrolytic hydrogen water generated in the cathode chamber (water intake electrode chamber) of the electrolytic cell 1 is discharged. Discharge is possible.

  In addition, the drainage flow path upstream portion 18a that discharges the acidic water generated in the anode chamber (the electrode chamber for byproduct water) of the electrolytic cell 1 in an L shape from the upper end surface to the front surface of the electrolytic cell 1 is a casing. Electrolysis that is formed integrally with the body (casing) part and that is connected to the flow path piping part 42 at its lower end and discharges the acidic water flowing through the drainage flow path upstream part 18 a toward the flow path piping part 42. The tank-side connection portion 18b is formed.

  On the other hand, the flow path piping unit 42 is a main raw water supply passage 24 for supplying raw water, and a sub raw water supply passage for branching from the main raw water supply passage 24 and connecting to the cathode chamber water supply port 43b to supply raw water into the cathode chamber. 24a, a sub-raw water supply passage 24b that branches from the main raw water supply passage 24 and is connected to the anode chamber water supply port 43a to supply mixed water (raw water and acidic water) to flow into the anode chamber, and the above-mentioned electrolytic cell side connection The flow passage pipe side connecting portion 18c that divides the acidic water while receiving the acidic water flowing through the drainage flow passage upstream portion 18a by connecting to the portion 18b and the flow provided by extending downward from the flow passage pipe side connecting portion 18c. A part of the acidic water shunted at the passage pipe side connecting portion 18c, that is, a reflux passage main pipe portion 44a for circulating the refluxed acidic water, and a main raw water supply passage 24 branched from the middle of the reflux passage main pipe portion 44a. Of the secondary raw water supply passage 24b in The branch line branch portion 44b connected to face the branch portion and the flow path pipe side connection portion 18c are extended laterally and provided downward in an L-shape in a bent state to divide the flow path pipe side connection portion 18c. Of the discharged acidic water, the drainage flow path middle-flow part 18d for circulating the remaining acidic water to be discharged, and the drainage flow path downstream connected to the lower ends of the return flow path main pipe part 44a and the drainage flow path middle-flow part 18d and communicating with the discharge port 63 And a part 18e. Further, the connecting and joining portion of the reflux passage branch pipe portion 44b and the main raw water supply passage 24 is an acidic water reflux mixing portion 44c for mixing the raw water with the acidic water. In the following description, the drainage flow path upstream part 18a, the electrolytic cell side connection part 18b, the flow path pipe side connection part 18c, the drainage flow path midstream part 18d, and the drainage flow path downstream part 18e are collectively referred to as the drainage flow path 18. The reflux passage main pipe portion 44a, the reflux passage branch pipe portion 44b, and the acidic water reflux mixing portion 44c are collectively referred to as the reflux bypass flow passage 70.

  As shown in FIG. 4 (a), the electrolytic cell side connection portion 18 b and the flow path pipe side connection portion 18 c are portions that function as a bent flow path that is interposed in the middle of the drainage flow path 18, and the flow path piping It serves to separate the part 42 from the front surface of the electrolytic cell 1 to form a separated flow path in the form of an imaginary pipe.

  Further, as shown in FIGS. 3 and 4 (b), in the middle of the drainage flow passage midstream portion 18d, a reflux electromagnetic valve 71 (two in FIG. 3 is provided for adjusting the amount of acidic water flowing through the drainage flow passage midstream portion 18d. (Indicated by the dotted chain line). The return electromagnetic valve 71 is opened in the energized state (ON state), does not limit the flow rate of the acidic water flowing through the drainage flow path midstream portion 18d, and is in a semi-closed state when the energization is cut off (OFF state). Therefore, it has a function of limiting the flow rate of the acidic water passing through the reflux electromagnetic valve 71 to about 1/2, and in other words, the split ratio of the acidic water split at the flow path pipe side connecting portion 18c. It is possible to change the amount of acidic water added to the raw water via the return passage main pipe portion 44a and the return passage branch pipe portion 44b.

  Further, as shown in FIG. 5, the return solenoid valve 71 is a part in which most of the entire portion including the coil portion and the like is formed in front of the electrolytic cell 1 and on the side of the flow path piping 42. By arranging in the arrangement space 75, as shown in FIG. 4B and FIG. 5, most of the reflux electromagnetic valve 71 is overlapped with the electrolysis section 4 in the front view and in the vicinity of the electrolysis tank 1. However, the reflux electromagnetic valve 71 as the flow rate adjusting means can be compactly arranged without clutter.

  An electromagnetic valve 52 is provided between the drainage flow path downstream portion 18e and the discharge port 63 as required by a broken line in FIGS. 2 and 3 to open or close the discharge port 63. It may be configured to be possible.

  Further, a check valve 41 that blocks a flow from the return passage main pipe portion 44a toward the drainage flow passage downstream portion 18e is provided at a position downstream of the branch portion of the return passage main pipe portion 44b in the return passage main pipe portion 44a. Has been done.

  As shown schematically in FIG. 2, the electrolytic cell 1 includes a first electrode plate 21 located at the center, a second electrode plate 22 located so as to sandwich the first electrode plate 21, and a third electrode plate 22. And an electrode plate 23. Then, the diaphragm 12 is provided 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, respectively. The first electrolytic chamber 25 that functions as an electrode chamber for water intake, the second electrolytic chamber 26 that functions as an electrode chamber for byproduct water, and the second electrolytic chamber that functions as an electrode chamber for byproduct water by the diaphragms 21, 22, 23 and the diaphragm 12. The third electrolytic chamber 27 and the fourth electrolytic chamber 28 functioning as a water intake electrode chamber 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 7 arranged in the casing 20, and serve as a water intake electrode plate for a cathode or an anode. On the other hand, the first electrode plate 21 has a polarity opposite to the polarities of the second electrode plate 22 and the third electrode plate 23 as a byproduct water electrode plate. Here, the second electrode plate 22 and the third electrode plate 23 are used as the cathode (cathode 14 in FIG. 1 described above), and the first electrode plate 21 is the anode (anode 13 in FIG. 1 described above). ), The first electrolytic chamber 25 and the fourth electrolytic chamber 28 correspond to the cathode chamber 11 shown in FIG. 1, and the second electrolytic chamber 26 and the third electrolytic chamber 27 correspond to the anode chamber 10. Will correspond. On the contrary, when the second electrode plate 22 and the third electrode plate 23 are the anodes, the first electrode plate 21 is the cathode, and the first electrolytic chamber 25 and the fourth electrolytic chamber 28 corresponds to the anode chamber 10, and the second electrolytic chamber 26 and the third electrolytic chamber 27 correspond to the cathode chamber 11.

  Each of the electrolysis chambers 25, 26, 27, 28 is provided with a water inlet and a water outlet, and the flow paths communicating with the respective outlets of the first electrolysis chamber 25 and the fourth electrolysis chamber 28 are electrolytic hydrogen. Alkaline water having a desired pH can be taken in through the electrolytic hydrogen water taking-out passage 17 by joining together at the water discharge ports 17a.

  On the other hand, the flow paths communicating with the outlets of the second electrolysis chamber 26 and the third electrolysis chamber 27 join each other to form the drainage flow path upstream portion 18a, and through the drainage flow path 18 via the discharge port 63. Acidic water can be drained (through the electromagnetic valve 52 when the electromagnetic valve 52 is provided near the discharge port 63). Note that, as described above, if the polarities of the electrode plates 21, 22, and 23 are reversed, the acidic water is naturally taken from the electrolytic hydrogen water extraction flow path 17 and the drain flow path 18 is discharged. Will drain alkaline water. The solenoid valve 52 is provided as needed, and is not provided when it is not necessary to prevent the drainage of the water flowing into the second electrolysis chamber 26 or the third electrolysis chamber 27 in the water purification mode described later. Both good.

  Water required for electrolysis is supplied to the electrolytic cell 1 by two auxiliary raw water supply passages 24a and 24b branched from the main raw water supply passage 24.

  As shown in FIG. 2, the downstream ends of the bifurcated secondary raw water supply passages 24a are connected to the inlets of the first electrolysis chamber 25 and the fourth electrolysis chamber 28, respectively. The downstream ends of the bifurcated secondary raw water supply passage 24b are connected to the inlets of the chamber 26 and the third electrolytic chamber 27, respectively, so that the raw water flowing through the main raw water supply passage 24 is supplied to each electrolytic chamber 25. , 26, 27, 28 can be supplied.

  Further, in the present embodiment, the flow rates of the main raw water supply passage 24, the sub raw water supply passage 24a, and the first electrolysis chamber 25 and the fourth electrolysis chamber 28, the sub raw water supply passage 24b, and the reflux bypass passage 70 are set. The flow rate that flows into the second electrolytic chamber 26 and the third electrolytic chamber 27 after that is set to be 19.5: 0.5 to 18: 2, for example, 19: 1. Specifically, in the middle of the flow path of the main raw water supply passage 24 on the downstream side of the branch portion of the sub raw water supply passage 24a and on the upstream side of the branch portion of the sub raw water supply passage 24b (for example, in FIGS. 2 and 3). This is realized by providing an orifice structure for lowering the pressure and the flow rate of the auxiliary raw water supply passage 24b at the position indicated by the symbol P) as compared with the auxiliary raw water supply passage 24a. That is, the pressure suppressing means such as such an orifice structure lowers the pressure in the acidic water reflux mixing section 44 c and relatively increases the pressure on the acidic water side that joins the reflux bypass flow passage 70 to increase the acidic water. It has a role of supporting circulation.

  The main raw water supply passage 24 and the drainage passage 18 are connected via a check valve 41. That is, in FIG. 3, the main raw water supply passage 24 is connected to the drainage passage downstream portion 18e through the return passage branch pipe portion 44b via the check valve 41. The check valve 41 closes the flow passage to stop the flow of water from the main raw water supply passage 24 toward the drainage passage 18 when there is water pressure during water passage. When the water pressure at that time is small, it is in an open state and has a role of flowing the water accumulated in each electrolytic chamber 25, 26, 27, 28 and each flow path to the drainage flow path 18.

  As shown in FIG. 2, the electrolytic cell 1 is supplied with water from the water pipe 30 through the water faucet 31, and the water faucet 31 is provided with a branch plug 32. One of the water supply hoses 33 is connected, and the other of the water supply hoses 33 is connected to the inflow port of the water purification unit 5.

  The water purification unit 5 is filled with a porous material such as activated carbon and functions as an adsorption means for adsorbing impurities contained in the water supplied from the water pipe 30. In addition to the relatively coarse filter such as the metal mesh, the cloth material and the filter paper, the water purification unit 5 also has a built-in filtering means such as a hollow fiber membrane capable of removing bacteria and the like. In this way, the water supplied from the water pipe 30 passes through the water purification unit 5 and is purified.

  The outlet of the water purification unit 5 is connected to the inlet of the flow rate sensor 53. The flow rate sensor 53 is configured to be able to measure the amount of flowing water. For example, a propeller is provided at the center of the flow rate sensor 53, and the amount of flowing water is measured by the rotation speed of the propeller. The outlet of the flow sensor 53 is connected to the inlet of the addition section 6.

  The addition section 6 contains a calcium agent for adding calcium to the purified water. The calcium agent contains calcium lactate, calcium glycerophosphate, etc., and its purpose is to promote the electrolysis of water with a small amount of electrolytic substance by bringing purified water into contact with the calcium agent to elute it. In this embodiment, the water that has passed through the addition unit 6 is supplied as raw water to the electrolytic cell 1 through the main raw water supply passage 24.

  The control unit 7 is provided with a control circuit that controls various functions of the electrolytic hydrogen water generator A according to the present embodiment, and includes the flow rate sensor 53, the first electrode plate 21, the second electrode plate 22, and the second electrode plate 22. 3 is electrically connected to the electrode plate 23. The flow rate sensor 53 outputs the detected electric signal to the control unit 7, and the control unit 7 calculates the water flow rate from the flow rate sensor 53 based on the electric signal. A voltage is applied to the first electrode plate 21, the second electrode plate 22, and the third electrode plate 23 based on a control signal supplied from an operation panel (not shown) connected to the control unit 7. The operation panel is arranged on the surface of the casing 20 of the electrolytic hydrogen water generator A, and is operated by the user of the electrolytic hydrogen water generator A. 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, a purified water supply button, an acidic water supply button. A supply button, a strongly acidic water supply button, etc. are provided. In addition, a display unit such as a 7-segment LED that displays information such as pH value, ORP value, and water flow rate is also provided.

  The power button is a button for starting the electrolytic hydrogen water generator A and is an effective button in any state. For example, when the wastewater treatment is in progress and the treatment is not completed, it is preferable that the power is turned off after the treatment is completed even if the power button is pressed. The ORP display button is a button for displaying the current ORP 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 strongly alkaline water supply button is a button for instructing the electrolytic hydrogen water generator A to generate strongly alkaline water. The strongly alkaline water has a pH of, for example, 10.5 and can be used for cooked foods, puffs, boiled vegetables, and the like.

  The first level alkaline water supply button is a button for instructing the electrolytic hydrogen water generator A to generate the first level alkaline water. The first level of alkaline water, for example, has a pH of 9.5 and can be used for cooking, tea and the like. The second level alkaline water supply button is a button for instructing the electrolytic hydrogen water generator A 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 present water purifier 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 water for the first drink and the like.

  The purified water supply button is a button for instructing that the water from the tap water is allowed to flow without performing electrolysis in the electrolytic hydrogen water generator A. The acidic water supply button is a button for instructing the electrolytic hydrogen water generator A to generate acidic water. The acidic water has a pH of 5.5, for example, and can be used for face washing, noodle boiled, tea astringent, and the like. The strongly acidic water supply lamp indicates that the electrolytic hydrogen water generator A is in the sanitary water generation mode. The strongly acidic water has a pH of 2.5, for example. The life setting button sets the life of the water purification unit 5 because the life varies depending on the type of the water purification unit 5, and this button is normally used until the time when the cartridge was replaced. This is performed once when a cartridge different from the cartridge is set and used. The reset button resets the cumulative water flow amount, which is the cumulative water flow amount up to the present, and actually clears the cumulative water flow amount counter existing in the control unit 7. This reset button becomes effective after being pressed for 2 seconds, and prevents the accumulated water flow rate from being reset by being accidentally pressed. This reset button is operated when the water purification unit 5 is replaced. The strong alkaline water supply button, the first level alkaline water supply button, the second level alkaline water supply button, the third level alkaline water supply button, the purified water supply button, and the acidic water supply button are currently effective. The button is lit and visible to the user. In addition, a temperature rise lamp for notifying the user when the temperature inside the electrolytic cell 1 rises is also arranged on the operation panel.

  As described with each button, the electrolytic hydrogen water generator A is roughly divided into an alkaline water generation mode for supplying alkaline water, a purified water mode for supplying purified water, an acidic water generation mode for supplying acidic water, and a strongly acidic water. There are four generation modes of strongly acidic water generation mode for supplying. The electrolytic hydrogen water generator A according to the present embodiment is provided with various configurations for executing the above-described modes, but various modes are not necessarily provided as long as electrolytic hydrogen water described below can be generated. It is not necessary to make it multifunctional. For example, the function or structure of generating strongly acidic water may be omitted.

  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 serve as cathodes and the first electrode plate 21 serves as an anode under the control of the control unit 7 with the electromagnetic valve 52 open.

  In the alkaline water generation modes of the first to third levels, drinkable alkaline water is generated, and the alkaline water of the first to third levels is water corresponding to electrolytic hydrogen water.

  The conventional water conditioner referred to above, that is, strong alkaline water having a pH of 10.5 or more containing dissolved hydrogen is once generated, and then raw water is added to this strong alkaline water to dilute it so that the pH is less than 10 suitable for drinking. In this case, even dissolved hydrogen was diluted with the addition of raw water, and only a dissolved hydrogen concentration of about 300 ppb was obtained.

  On the other hand, according to the electrolytic hydrogen water generator A according to the present embodiment, as described with reference to FIG. 1, since the hydrogen ions existing in the anode chamber through the diaphragm suppress the increase in pH in the cathode chamber. It is possible to generate electrolytic hydrogen water containing at least 400 ppb or more of dissolved hydrogen while having a pH below 10 suitable for drinking.

  In the water purification mode, no voltage is applied to any of the electrode plates 21, 22, 23, that is, electrolysis is not performed. Here, when the electromagnetic valve 52 is provided, by closing the electromagnetic valve 52, useless water is prevented from being discharged from the discharge port 63. In the acidic water generation mode, the second electrode plate 22 and the third electrode plate 23 serve as anodes and the first electrode plate 21 serves as a cathode under the control of the controller 7, which is the reverse of the alkaline water production mode.

  In the above configuration, the feature of the electrolytic hydrogen water generator A according to the present embodiment is that raw water supplied to the second electrolytic chamber 26 and the third electrolytic chamber 27 corresponding to the anode chamber when the alkaline water generating mode is selected. The point is that a reflux bypass passage 70 is provided to join a part of the acidic water discharged from the electrolytic cell 1.

  More specifically, as shown in FIG. 2, the reflux bypass flow passage 70 is an acidic water branch flow that splits a part of the acidic water from the middle of the drainage flow passage 18 that drains the acidic water discharged from the electrolytic cell 1. The return passage main pipe portion 44a and the return passage branch pipe portion 44b are formed in the middle of the auxiliary raw water supply passage 24b for supplying raw water to the second electrolysis chamber 26 and the third electrolysis chamber 27. The acidic water reflux mixing unit 44c that mixes the acidic water flowing through the unit 44b with the raw water is configured.

  In addition, the recirculation bypass flow passage 70 is realized by the recirculation passage main pipe portion 44a and the return passage branch pipe portion 44b starting from the flow passage pipe side connecting portion 18c, and additionally described with reference to FIG. A part of the acidic water diverted at the flow path pipe side connecting portion 18c portion corresponding to the midway portion from the drain flow path upstream portion 18a for draining the water to the main raw water supply path 24 The acidic water reflux mixing section 44c is realized by merging the raw water with the reflux path branch pipe section 44b facing the branch portion of the raw water supply path 24b.

  In addition, as shown in FIG. 2, in the middle of the drainage flow path 18 on the downstream side of the flow path pipe-side connecting portion 18c, that is, in the middle of the drainage flow path midstream portion 18d, the return bypass flow path 70 (reflow path) is provided. A reflux electromagnetic valve 71 that functions as a flow rate adjusting unit for the acidic water (reflux acidic water) flowing through the main pipe portion 44a to the acidic water reflux mixing portion 44c is provided. The return electromagnetic valve 71 is electrically connected to the control unit 7, and is controlled to be in an open state in the acidic water mode and the strong alkaline water generating mode, while it is in the drainage flow path in the alkaline water generating mode. The control is switched to a semi-closed state so that about 1/2 amount of the acidic water flowing through 18 is passed.

  It should be noted that the return electromagnetic valve 71 is not limited to the position shown in FIGS. It is not necessary to provide it at the position shown in FIG. 3, but it may be provided at a position where the reflux amount of acidic water and the presence / absence of reflux of the acidic water via the reflux bypass passage 70 can be controlled according to the relationship of the piping connection structure of the reflux line and the pressure in the piping. It is possible.

  Then, for example, when the first level alkaline water (pH 9.5) supply button is operated and the water supply to the electrolytic hydrogen water generator A is started by the operation of the water faucet 31 and the branch plug 32, the water purification unit 5 The raw water generated through the addition unit 6 and the addition unit 6 is supplied into the electrolytic cell 1 through the main raw water supply passage 24, the sub raw water supply passage 24a and the sub raw water supply passage 24b, as indicated by the broken line arrow in FIG. It

  Further, in the control section 7, the flow rate is changed so that the return electromagnetic valve 71 is in a semi-closed state, and if the non-return method is used, water in the cathode chamber (first electrolytic chamber 25 or fourth electrolytic chamber 28) is changed. The electrolysis is carried out by increasing the applied voltage to the first to third electrode plates 21 to 23 to a voltage level at which the pH of 10 exceeds 10.

  The acidic water generated in the anode chamber (the second electrolysis chamber 26 and the third electrolysis chamber 27) overflows with the supply of raw water, and as shown by the solid arrow in FIG. The flow path piping side connecting portion 18c is reached via 18a and the electrolytic cell side connecting portion 18b.

  In the flow path pipe side connection portion 18c, the flow is divided by the flow restriction of the return electromagnetic valve 71 (about 1: 1 in the present embodiment), a part of the acidic water flows into the return path main pipe portion 44a, and the rest is the drainage flow path. It flows into the midstream portion 18d, and is discharged through the discharge port 63 through the drainage flow path downstream portion 18e. That is, the amount of drainage of acidic water is reduced to half that of the non-refluxing system.

  The acidic water that has flowed into the reflux passage main pipe portion 44a does not flow into the drainage flow passage downstream portion 18e due to the check valve 41, and reaches the acidic water reflux mixing portion 44c through the reflux passage branch pipe portion 44b. In the acidic water reflux mixing section 44c, the acidic water is mixed with the raw water to form a mixed water, and the anode chamber (the second electrolytic chamber 26 and the third electrolytic chamber 27) is passed through the auxiliary raw water supply passage 24b as shown by the hatched arrow. ) Is supplied inside. The flow rate ratio between the amount of mixed water flowing through the sub raw water supply passage 24b and the amount of raw water flowing through the sub raw water supply passage 24a is 1:19.

  When the acidic water is sufficiently refluxed to reach the equilibrium state, the space between the first electrolytic chamber 25 (cathode chamber) and the second electrolytic chamber 26 (anode chamber), and the third electrolytic chamber 27 ( Between the anode chamber) and the fourth electrolysis chamber 28 (cathode chamber), a large amount of hydrogen ions existing on the anode chamber side causes a pH rise suppressing action on the cathode chamber side via the diaphragm 12. , Alkaline water having a pH of 9.5 and supplying alkaline water containing approximately 400 ppb of electrolytically dissolved hydrogen by electrolysis with a large current that could not be realized by the non-reflux method, that is, electrolytic hydrogen water (Indicated by a white arrow in FIG. 3).

  In addition, in order to generate good electrolyzed hydrogen water, at least about 1/10 of the amount of water in the cathode chamber needs to flow into the anode chamber, but in the non-reflux system, water is passed through the anode chamber. About one-tenth of the amount of water that was saved will be drained as it is. If the non-refluxing system is used, the flow rate of water flowing to the cathode chamber must be reduced in order to reduce the amount of drainage while maintaining good production of electrolytic hydrogen water.

  On the other hand, in the electrolytic hydrogen water generator A according to the present embodiment, of the approximately 1/10 amount of water that has flowed into the anode chamber, approximately 1/20 of that amount of water is refluxed as acidic water, About 1/20 of the raw water flows into the other half, so about 1/10 of the water can flow into the anode chamber, but the acidic water drained out is about 1/20, which is a non-reflux system. Compared with the case, it is possible to reduce the amount of drainage of acidic water by about half.

  The storage unit of the control unit 7 stores a table in which the relationship between the alkaline water generation mode of each level having a desired pH value and the applied voltage is optimized in advance, and the control unit 7 stores the table. With reference to this, a relatively high voltage is applied in the order of the first level alkaline water generation mode, the second level alkaline water generation mode, and the third level alkaline water generation mode. As a matter of course, the higher the applied voltage, the stronger the alkali becomes, so the amount of dissolved hydrogen also increases.

  Further, referring to the features of the external configuration of the electrolysis section 4, as shown in FIG. 5, the electrolysis tank is connected to the electrolysis tank side connecting portion 18b and the flow path piping side connecting portion 18c in the middle part of the drainage flow path 18. 1, a bent flow path is formed in front of the front of the electrolytic cell 1, and a part placement space 75 is formed on the front side of the electrolytic cell 1 and on the side of the flow path piping portion 42 in the form of an imaginary pipe.

  Then, by arranging most of the reflux electromagnetic valve 71 provided in the middle of the drainage flow path middle portion 18d in the parts disposition space 75, the reflux electromagnetic valve 71 can be compactly arranged even in the vicinity of the electrolytic cell 1. To effectively utilize the space in the vicinity of the electrolytic cell 1.

  Further, as shown by the hatched line in FIG. 5, in the flow path piping part 42, the flow path piping side connecting part 18c, the return path main pipe part 44a extending downward from the flow path piping side connecting part 18c, and the flow path The drainage flow path middle portion 18d that extends laterally from the passage piping side connection portion 18c and bends downward in an L shape, and the drainage flow path downstream that connects the ends of the return passage main pipe portion 44a and the drainage flow passage middle-flow portion 18d. A rectangular connecting structure 76 is formed by the portion 18e, and the return electromagnetic valve 71 is provided at an intermediate portion of the drainage flow path midstream portion 18d which is one of the pipes forming the rectangular connecting structure 76.

  The rectangular connecting structure 76 is firmly fixed to the electrolytic cell 1 via the electrolytic cell side connection portion 18b at the upper portion thereof, while at the lower portion thereof, via the auxiliary raw water supply passage 24a and the auxiliary raw water supply passage 24b. 1 is firmly connected to the main raw water supply passage 24 supported at two points via the return passage branch pipe portion 44b, and is free from wobbling with respect to the electrolytic cell 1 even though it is an overhead pipe.

  Therefore, the relatively heavy return electromagnetic valve 71 can be stably held in the midway portion of the drainage flow passage midstream portion 18d, and troubles to the return electromagnetic valve 71 due to vibration or the like and the flow passage piping portion 42 can be maintained. It is possible to steadily prevent troubles such as water leakage in.

  Further, as shown in FIGS. 3 and 4 (a), the drainage flow path upstream portion 18a, which is on the upstream side of the electrolytic cell side connection portion 18b and the flow path piping side connection portion 18c corresponding to the bent flow path, is formed by electrolysis. Since it is formed integrally with the housing portion of the tank 1, the front part of the electrolytic cell 1 which is immediately above the separated flow path (flow path piping portion 42) also corresponds to the expansive parts placement space 75. It becomes possible to secure a space.

  In addition, the return passage main pipe portion 44a and the return passage branch pipe portion 44b are arranged so as to sneak in a L-shaped bent state from the front side of the electrolytic cell 1 to a lower portion, and a portion connected to the main raw water supply passage 24 is arranged. Since the acidic water reflux mixing section 44c is used, generation of mixed water to be supplied to the anode chamber is prevented while preventing deformation and the like due to vibrations and the like in the aerial piping-shaped flow path piping section 42 including the rectangular connection structure 76 described above. Can be solid.

  As described above, according to the electrolytic hydrogen water generator (for example, electrolytic hydrogen water generator A) according to the present embodiment, the anode chamber (for example, the second electrolytic chamber) partitioned by the diaphragm (for example, the diaphragm 12) is used. 26, a third electrolysis chamber 27) and a cathode chamber (for example, a first electrolysis chamber 25, a fourth electrolysis chamber 28), and electrodes (for example, provided in each polar chamber while supplying water). While the first electrode plate 21, the second electrode plate 22, the third electrode plate 23) is energized through the diaphragm, the water is electrolyzed and the acidic water is discharged from the anode chamber. An electrolytic hydrogen water generator comprising an electrolytic cell (for example, electrolytic cell 1) for discharging alkaline electrolytic hydrogen water (for example, alkaline water of the first to third levels) from the cathode chamber to the anode chamber. A reflux bar that joins part of the acidic water discharged from the electrolyzer with the raw water to be supplied. Provided is an electrolytic hydrogen water generator capable of suppressing a rise in pH of electrolytic hydrogen water with almost no decrease in the dissolved hydrogen concentration of the generated electrolytic hydrogen water, since it has a pass flow path (for example, a reflux bypass flow path 70). can do.

  Finally, the above description of each embodiment is an example of the present invention, and the present invention is not limited to the above embodiment. Therefore, it goes without saying that various modifications other than the above-described embodiments can be made according to the design and the like as long as they do not deviate from the technical idea of the present invention.

  In the electrolytic hydrogen water generator A according to the present embodiment, the reflux destination of the reflux bypass flow passage 70 is the starting end portion of the raw water supply pipeline (upstream starting end portion of the sub raw water supply passage 24b) that flows into the anode chamber. It is not limited to this, but as shown by a symbol X in FIG. 2 and FIG. The upstream position of the branch portion of the raw water supply passage 24a or the branch portion of the auxiliary raw water supply passage 24b may be used as the reflux destination and may be the acidic water reflux mixing portion.

  Further, in the electrolytic hydrogen water generator A according to the present embodiment, the drainage flow path 18 that is on the downstream side of the branch section of the reflux bypass flow path 70 and on the upstream side of the branch section of the flow path communicating with the check valve 41. In the middle of the process, a reflux electromagnetic valve 71 capable of switching between an open state and a semi-closed state is provided to control the reflux amount of acidic water and the presence or absence of reflux through the reflux bypass flow passage 70. Needless to say, the pipes, valves, etc. may be appropriately changed as long as the configuration can exert the function of. For example, as shown in FIG. 6, instead of the return electromagnetic valve 71 provided in the middle of the drainage passage 18, a return control passage 77 may be provided.

  Specifically, the reflux control flow path portion 77 in FIG. 6 has a flow path structure in which the drain flow path midstream portion 18d is bifurcated from the upstream side to the downstream side and then merged again.

  One of the branched flow paths is an opening / closing flow path 77a including an electromagnetic valve 78 that can be switched between an open state in which the flow rate is not restricted and a closed state in which the flow is completely restricted. The other branched flow path is the electromagnetic valve. When 78 is open, the acidic water that has been split in the flow dividing portion 77c is allowed to flow without restriction, and when the solenoid valve 78 is closed, acidic water that flows upstream of the branch portion of the reflux bypass passage 70 is acidic. The flow passage 77b is capable of restricting the flow rate such that a predetermined amount (for example, approximately half) of water is branched to the reflux bypass flow passage 70 side.

  Even with the electrolytic hydrogen water generator including the reflux control flow passage portion 77, a predetermined amount of acidic water can be refluxed by closing the electromagnetic valve 78 when the electrolytic hydrogen water is generated. It is possible to provide an electrolytic hydrogen water generator that can suppress an increase in pH of electrolytic hydrogen water with almost no reduction in the dissolved hydrogen concentration of the generated electrolytic hydrogen water.

DESCRIPTION OF SYMBOLS 1 Electrolyzer 10 Anode chamber 11 Cathode chamber 12 Membrane 13 Anode 14 Cathode 18 Drainage flow path 18c Flow path pipe side connection part 24 Main raw water supply path 24a Sub raw water supply path 24b Sub raw water supply path 44a Return path main pipe section 44b Reflux path branch Tube part 44c Acidic water reflux mixing part 70 Reflux bypass flow path 71 Reflux solenoid valve A Electrolytic hydrogen water generator

Claims (1)

It has an anode chamber and a cathode chamber partitioned by a diaphragm, and the water is electrolyzed by supplying electricity through the diaphragm between the electrodes arranged in each electrode chamber while supplying water. An electrolytic cell having a box-shaped casing for discharging alkaline electrolytic hydrogen water from the cathode chamber while discharging acidic water,
The raw water supplied to the anode chamber is provided with a reflux bypass flow path for joining a part of the acidic water discharged from the electrolytic cell,
The reflux bypass channel is
An acidic water branch flow channel that diverts a part of the acidic water from the middle of a drainage channel that drains the acidic water discharged from the electrolyzer.
An acidic water reflux mixing section which is formed on a flow path for supplying raw water to the anode chamber, and merges the acidic water flowing through the acidic water branch flow path with the raw water,
Equipped with
The drainage flow channel is an electrolytic hydrogen water generator in which a flow rate adjusting means for adjusting the flow rate of the acidic water flowing through the drainage flow channel is provided on the downstream side of the branch portion of the acid water branching flow channel. hand,
The upstream side of the branch portion of the drainage flow path is integrally formed in an L shape from the upper end surface of the casing of the electrolytic cell along the front surface,
The downstream side of the branch portion of the drainage flow path is a separated flow path that is separated from the front of the electrolytic cell by a bent flow path.
The separated flow passage includes a return flow passage main pipe portion that extends downward from the bent flow passage, and a drain flow passage middle-flow portion that extends laterally from the bent flow passage and then bends in an L shape and extends downward. And a drainage flow channel downstream part that connects the downstream side end of the return flow channel main pipe part and the downstream side end of the drainage flow path midstream part, a rectangular connection structure is formed, and the flow rate adjusting means is the rectangular connection. An electrolytic hydrogen water generator characterized in that it is interposed in the middle part of the drainage flow path, which is one of the pipes constituting the structure .

Images