US20170327958A1 - Method of obtaining hydrogen concentration in hydrogen-containing liquid and generator for hydrogen-containing liquid - Google Patents
Method of obtaining hydrogen concentration in hydrogen-containing liquid and generator for hydrogen-containing liquid Download PDFInfo
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- US20170327958A1 US20170327958A1 US15/591,602 US201715591602A US2017327958A1 US 20170327958 A1 US20170327958 A1 US 20170327958A1 US 201715591602 A US201715591602 A US 201715591602A US 2017327958 A1 US2017327958 A1 US 2017327958A1
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Abstract
The generator comprises: a hydrogen supply source (2) configured to continuously supply a hydrogen-containing gas; a liquid supply source (3) configured to continuously supply a liquid; a dissolving unit (4) configured to dissolve the hydrogen-containing gas in the liquid; a memory (5) configured to store preliminarily-obtained relational information among a flow rate, water pressure, and hydrogen concentration of the hydrogen-containing liquid passing through the dissolving unit; a flow rate detector (52) configured to detect the flow rate of the hydrogen-containing liquid; a water pressure detector (51) configured to detect the water pressure of the hydrogen-containing liquid; and a calculator (5) configured to obtain the hydrogen concentration on the basis of the detected flow rate and water pressure and the relational information.
Description
- The present invention relates to a method of obtaining a hydrogen concentration in a hydrogen-containing liquid and relates also to a generator for a hydrogen-containing liquid.
- For use in an electrolyzed water generator that generates electrolyzed water, a method of measuring a dissolved hydrogen concentration in the generated hydrogen water is known (Patent Document 1: JP2015-087221A). This method includes a measurement step and a calculation step. The measurement step is designed to measure current flowing between a cathode plate disposed in a cathode chamber and an anode plate disposed in an anode chamber and to measure a discharge flow rate of the hydrogen water generated in the cathode chamber. The calculation step is designed to calculate a dissolved hydrogen concentration in the hydrogen water generated in the cathode chamber in accordance with the current and discharge flow rate measured in the measurement step, on the basis of data that represents a correlation between the preliminarily measured current and discharge flow rate and the dissolved hydrogen concentration in the hydrogen water.
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- [Patent Document 1] JP2015-087221A
- The dissolved hydrogen concentration in the above prior art electrolyzed water is less than 1 ppm (see
FIGS. 1, 2, 6, and 7 of the document), which may be insufficient to exhibit antioxidative properties. - Problems to be solved by the present invention include providing a method of obtaining a hydrogen concentration even in a high-concentration hydrogen-containing liquid and providing a generator for a hydrogen-containing liquid.
- The present invention solves the above problems through preliminarily obtaining a relationship among a flow rate, water pressure, and hydrogen concentration of a hydrogen-containing liquid, detecting the flow rate and water pressure of the hydrogen-containing liquid, and obtaining the hydrogen concentration on the basis of the detected flow rate and water pressure and the preliminarily-obtained relationship.
- According to another aspect, the present invention solves the above problems through preliminarily obtaining a relationship among an electric quantity during electrolysis, a water pressure of a hydrogen-containing liquid, and a hydrogen concentration, detecting the electric quantity during the electrolysis and the water pressure of the hydrogen-containing liquid, and obtaining the hydrogen concentration on the basis of the detected electric quantity and water pressure and the preliminarily-obtained relationship.
- According to the present invention, the hydrogen concentration can be obtained even in a high-concentration hydrogen-containing liquid.
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FIG. 1 is a block diagram illustrating an embodiment of the generator for a hydrogen-containing liquid according to the present invention. -
FIG. 2 is a block diagram illustrating another embodiment of the generator for a hydrogen-containing liquid according to the present invention. -
FIG. 3 is a block diagram illustrating still another embodiment of the generator for a hydrogen-containing liquid according to the present invention. -
FIG. 4 is a block diagram illustrating yet another embodiment of the generator for a hydrogen-containing liquid according to the present invention. -
FIG. 1 is a block diagram illustrating an embodiment of agenerator 1 for generating a hydrogen-containing liquid according to the present invention. As illustrated in the figure, thegenerator 1 of the present embodiment comprises ahydrogen supply source 2 configured to supply a hydrogen-containing gas, aliquid supply source 3 configured to supply a liquid, and a dissolvingunit 4 configured to dissolve the hydrogen-containing gas in the liquid. - The
hydrogen supply source 2 is to supply a gas that contains a hydrogen component as the primary component (referred also to as a “hydrogen-containing gas,” hereinafter). Examples of thehydrogen supply source 2 include a hydrogen gas cylinder, hydrogen storing alloy, fuel reformer, and electrolyzed water generator. The hydrogen-containing gas supplied from thehydrogen supply source 2 is sent to ajunction part 41 via ahydrogen supply tube 21. Thehydrogen supply tube 21 is provided with acheck valve 22, and the hydrogen-containing gas having passed through thecheck valve 22 does not return to thehydrogen supply source 2. Thehydrogen supply tube 21 may be provided with a fluid pressurization pump to regulate the supply pressure of the hydrogen-containing gas from thehydrogen supply source 2 to thejunction part 41. - The
liquid supply source 3 is to supply a liquid of the intended hydrogen-containing liquid, that is, a liquid to which hydrogen gas is to be dissolved. Examples of the liquid include water such as tap water, beverage, and medicinal liquid. The liquid supplied from theliquid supply source 3 is sent to thejunction part 41 via aliquid supply tube 31. Theliquid supply tube 31 may be provided with a fluid pressurization pump to regulate the supply pressure of the liquid from theliquid supply source 3 to thejunction part 41. Theliquid supply tube 31 may also be provided with a check valve so that the liquid from theliquid supply source 3 does not return thereto. - The
junction part 41 is composed of a piping joint that connects between thehydrogen supply tube 21 and theliquid supply tube 31. The hydrogen-containing gas and liquid reaching thejunction part 41 flow into a gas/liquid mixing pipe 42 and are sent under pressure to the downstream side by afluid pressurization pump 43 provided at the gas/liquid mixing pipe 42. The gas/liquid mixing pipe 42 is provided with a dissolvingunit 4 at the downstream side from thefluid pressurization pump 43. The gas/liquid mixing pipe 42 is also provided with a flowrate regulating valve 44 at the downstream side from the dissolvingunit 4. - The dissolving
unit 4 is a cylindrical body having a larger inner diameter than that of the gas/liquid mixing pipe 42 and comprises a mixing body having fine pores, such as a membrane filter, which is provided inside the cylindrical body. When the gas/liquid mixture of the hydrogen-containing gas and the liquid passes through the fine pores of the membrane filter or the like, the hydrogen-containing gas becomes fine bubbles thereby to increase their surface area in contact with the liquid. Moreover, the hydrogen concentration increases because the hydrogen-containing gas in a form of fine bubbles and the liquid are pressurized in accordance with the pressurizing force by thefluid pressurization pump 43 and the opening degree of the flowrate regulating valve 44. The hydrogen-containing liquid, which thus has a high concentration, is supplied from asupply port 45 to an intended site. - The
generator 1 for generating a hydrogen-containing liquid according to the present embodiment comprises, in addition to the above-described configuration, awater pressure detector 51 configured to detect the water pressure of the hydrogen-containing liquid, aflow rate detector 52 configured to detect the flow rate of the hydrogen-containing liquid, acalculator 5, and adisplay 6. - The
water pressure detector 51 is provided on the gas/liquid mixing pipe 42 between thefluid pressurization pump 43 and the dissolvingunit 4 and detects the water pressure of the hydrogen-containing liquid (gas/liquid mixture of the hydrogen-containing gas and the liquid) which is pressurized by thefluid pressurization pump 43. The detection signal from thewater pressure detector 51 is read out by thecalculator 5 at a predetermined time interval. In an alternative embodiment, thewater pressure detector 51 may be provided on the gas/liquid mixing pipe 42 between the dissolvingunit 4 and the flowrate regulating valve 44. - The
flow rate detector 52 detects the opening degree of the flowrate regulating valve 44 to detect the flow rate of the hydrogen-containing liquid. The detection signal from theflow rate detector 52 is read out by thecalculator 5 at a predetermined time interval. In an alternative embodiment, theflow rate detector 52 may be provided on the gas/liquid mixing pipe 42 between the flowrate regulating valve 44 and thesupply port 45. - The
calculator 5 is composed of a microcomputer that includes a CPU, ROM, and RAM. The ROM also functions as a storage that stores preliminarily-obtained relational information among the flow rate, water pressure, and hydrogen concentration of the hydrogen-containing liquid passing through the dissolvingunit 4. In the ROM, a calculation program is established to obtain the hydrogen concentration in actual use on the basis of the detected flow rate and water pressure and the relational information. - The
display 6 is to present the hydrogen concentration obtained by thecalculator 5. Examples of thedisplay 6 include indicators, such as a seven-segment digital indicator, with which the concentration can be visually recognized and those, such as a speaker, with which the concentration can be audibly perceived. - The
generator 1 for generating a hydrogen-containing liquid as illustrated inFIG. 1 was made using a three-layer electrolytic cell available from MiZ Company Limited as thehydrogen supply source 2, tap water as theliquid supply source 3, CDP8800 available from Aquatec as thefluid pressurization pump 43, and MOM-PF5 (membrane filter) available from MonotaRO Co., Ltd. as thedissolving unit 4. The flow rate of the hydrogen-containing gas supplied from thehydrogen supply source 2 to thejunction part 41 was controlled by a value of current flowing through electrodes of the MiZ three-layer electrolytic cell. The flow rate of the tap water supplied from theliquid supply source 3 to thejunction part 41 was controlled by the opening degree of the water outlet. The pressure of the gas/liquid mixture between thefluid pressurization pump 43 and the dissolvingunit 4 was controlled by thefluid pressurization pump 43 and the flowrate regulating valve 44. The dissolved hydrogen concentration was measured (titrated) with a dissolved hydrogen concentration measuring reagent (9.88 ml of alcohols containing ethanol, methylene blue, and colloidal platinum) available from MiZ Company Limited using a dropper for dropping the reagent drop by drop, one drop capable of reacting with 0.1 ppm of hydrogen. This titration was performed by counting the number of drops when the blue reagent turned to transparent. Results are listed in Table 1. -
TABLE 1 Correlation coefficient between Hydrogen pressure and Flow rate Pressure concentration hydrogen Deaeration Current (A) (L/min) (MPa) (ppm) concentration Example 1 None 18.0 3.0 0.4 2.2 0.983 Example 2 18.0 3.0 0.3 2.0 Example 3 18.0 3.0 0.2 1.8 Example 4 18.0 3.0 0.1 1.4 Example 5 None 18.0 1.5 0.4 2.5 0.988 Example 6 18.0 1.5 0.3 1.9 Example 7 18.0 1.5 0.2 1.5 Example 8 18.0 1.5 0.1 1.2 Example 9 None 6.0 1.5 0.4 1.3 0.976 Example 10 6.0 1.5 0.3 1.0 Example 11 6.0 1.5 0.2 0.8 Example 12 6.0 1.5 0.1 0.7 - Examples 1 to 4 are those in which the hydrogen concentration was measured when the flow rate of the hydrogen-containing gas from the
hydrogen supply source 2 was constant (18.0 A), the flow rate of the tap water from theliquid supply source 3 was constant (3.0 L/min), and the pressure of the gas/liquid mixture was varied from 0.1 to 0.4 MPa. The correlation coefficient between the pressure of the gas/liquid mixture and the hydrogen concentration is 0.983, which is very close to 1. Examples 5 to 8 are those in which the hydrogen concentration was measured when the flow rate of the tap water was 1.5 L/min as substitute for 3.0 L/min in Examples 1 to 4 and the pressure of the gas/liquid mixture was varied from 0.1 to 0.4 MPa. The correlation coefficient between the pressure of the gas/liquid mixture and the hydrogen concentration is 0.988, which is very close to 1. Examples 9 to 12 are those in which the hydrogen concentration was measured when the flow rate of the hydrogen-containing gas was 6.0 A as substitute for 18.0 A in Examples 5 to 8 and the pressure of the gas/liquid mixture was varied from 0.1 to 0.4 MPa. The correlation coefficient between the pressure of the gas/liquid mixture and the hydrogen concentration is 0.976, which is very close to 1. - As the above, the correlation coefficient between the pressure of the gas/liquid mixture and the hydrogen concentration is very close to 1 at a given flow rate of the hydrogen-containing gas from the
hydrogen supply source 2 and a given flow rate of the tap water from theliquid supply source 3. Accordingly, a relational expression thereamong is preliminarily obtained and stored in the ROM of thecalculator 5. When thegenerator 1 for generating a hydrogen-containing liquid is actually used with a fixed value of the flow rate of the hydrogen-containing gas from thehydrogen supply source 2, that is, a fixed value of the current, the flow rate detected by theflow rate detector 52 and the water pressure detected by thewater pressure detector 51 are read into thecalculator 5, and the detected flow rate and the detected pressure are substituted into the relational expression to obtain the hydrogen concentration using the calculation program established in the ROM for obtaining the hydrogen concentration. This obtained hydrogen concentration is presented by thedisplay 6 and the user can thus perceive the hydrogen concentration in the hydrogen-containing liquid from thesupply port 45. -
FIG. 2 is a block diagram illustrating another embodiment of agenerator 1 for generating a hydrogen-containing liquid according to the present invention. As illustrated in the figure, thegenerator 1 of the present embodiment is different from thegenerator 1 illustrated inFIG. 1 in that theliquid supply tube 31 is provided with adeaeration module 32 and avacuum pump 33, and other features are the same as those illustrated inFIG. 1 . Turning on thevacuum pump 33 to operate thedeaeration module 32 allows gases (mainly oxygen and other gases) to be removed (namely, to be deaired) from the liquid supplied from theliquid supply source 3. This operation can enhance the hydrogen concentration because the amount of contact between the liquid and the hydrogen gas increases in the pass from thejunction part 41 to thedissolving unit 4. - The
generator 1 for generating a hydrogen-containing liquid as illustrated inFIG. 2 was made using a three-layer electrolytic cell available from MiZ Company Limited as thehydrogen supply source 2, tap water as theliquid supply source 3, SEPAREL EF-002A-P available from DIC Corporation as thedeaeration module 32, DAP-6D available from ULVAC, Inc. as thevacuum pump 33 for thedeaeration module 32, CDP8800 available from Aquatec as thefluid pressurization pump 43, and MOM-PF5 (membrane filter) available from MonotaRO Co., Ltd. as thedissolving unit 4. The flow rate of the hydrogen-containing gas supplied from thehydrogen supply source 2 to thejunction part 41 was controlled by a value of current flowing through electrodes of the MiZ three-layer electrolytic cell. The flow rate of the tap water supplied from theliquid supply source 3 to thejunction part 41 was controlled by the opening degree of the water outlet. The pressure of the gas/liquid mixture between thefluid pressurization pump 43 and thedissolving unit 4 was controlled by thefluid pressurization pump 43 and the flowrate regulating valve 44. The dissolved hydrogen concentration was measured (titrated) with a dissolved hydrogen concentration measuring reagent (9.88 ml of alcohols containing ethanol, methylene blue, and colloidal platinum) available from MiZ Company Limited using a dropper for dropping the reagent drop by drop, one drop capable of reacting with 0.1 ppm of hydrogen. This titration was performed by counting the number of drops when the blue reagent turned to transparent. Results are listed in Table 2. -
TABLE 2 Correlation coefficient between Hydrogen pressure and Flow rate Pressure concentration hydrogen Deaeration Current (A) (L/min) (MPa) (ppm) concentration Example 13 Done 18.0 3.0 0.4 3.3 0.976 Example 14 18.0 3.0 0.3 2.7 Example 15 18.0 3.0 0.2 2.3 Example 16 18.0 3.0 0.1 2.1 Example 17 Done 18.0 1.5 0.4 3.2 0.984 Example 18 18.0 1.5 0.3 2.9 Example 19 18.0 1.5 0.2 2.0 Example 20 18.0 1.5 0.1 1.5 Example 21 Done 6.0 1.5 0.4 1.7 1.000 Example 22 6.0 1.5 0.3 1.5 Example 23 6.0 1.5 0.2 1.3 Example 24 6.0 1.5 0.1 1.1 - Examples 13 to 16 are those in which the hydrogen concentration was measured when the flow rate of the hydrogen-containing gas from the
hydrogen supply source 2 was constant (18.0 A), the flow rate of the tap water from theliquid supply source 3 was constant (3.0 L/min), and the pressure of the gas/liquid mixture was varied from 0.1 to 0.4 MPa. The correlation coefficient between the pressure of the gas/liquid mixture and the hydrogen concentration is 0.976, which is very close to 1. Examples 17 to 20 are those in which the hydrogen concentration was measured when the flow rate of the tap water was 1.5 L/min as substitute for 3.0 L/min in Examples 13 to 16 and the pressure of the gas/liquid mixture was varied from 0.1 to 0.4 MPa. The correlation coefficient between the pressure of the gas/liquid mixture and the hydrogen concentration is 0.984, which is very close to 1. Examples 21 to 24 are those in which the hydrogen concentration was measured when the flow rate of the hydrogen-containing gas was 6.0 A as substitute for 18.0 A in Examples 17 to 20 and the pressure of the gas/liquid mixture was varied from 0.1 to 0.4 MPa. The correlation coefficient between the pressure of the gas/liquid mixture and the hydrogen concentration is 1. - As the above, also when the
deaeration module 32 is provided, the correlation coefficient between the pressure of the gas/liquid mixture and the hydrogen concentration is 1 or very close to 1 at a given flow rate of the hydrogen-containing gas from thehydrogen supply source 2 and a given flow rate of the tap water from theliquid supply source 3. Accordingly, a relational expression thereamong is preliminarily obtained and stored in the ROM of thecalculator 5. When thegenerator 1 for generating a hydrogen-containing liquid is actually used with a fixed value of the flow rate of the hydrogen-containing gas from thehydrogen supply source 2, that is, a fixed value of the current, the flow rate detected by theflow rate detector 52 and the water pressure detected by thewater pressure detector 51 are read into thecalculator 5, and the detected flow rate and the detected pressure are substituted into the relational expression to obtain the hydrogen concentration using the calculation program established in the ROM for obtaining the hydrogen concentration. This obtained hydrogen concentration is presented by thedisplay 6 and the user can thus perceive the hydrogen concentration in the hydrogen-containing liquid from thesupply port 45. -
FIG. 3 is a block diagram illustrating still another embodiment of agenerator 1 for generating a hydrogen-containing liquid according to the present invention. As illustrated in the figure, thegenerator 1 of the present embodiment uses an electrolyzed water generator as thehydrogen supply source 2. The electrolyzed water generator comprises anelectrolyzer 23, a separatingmembrane 24, a pair ofanode plate 25 andcathode plate 26 arranged to sandwich the separatingmembrane 24, aDC power source 27 configured to supply DC power to theanode plate 25 and thecathode plate 26, and a liquid 28 to be electrolyzed which is stored in theelectrolyzer 23. Thegenerator 1 is provided with acurrent detector 53 configured to detect a value of current flowing through thecathode plate 26 and its detection signal is read out by thecalculator 5 at a predetermined time interval. Instead, theflow rate detector 52 provided at the flowrate regulating valve 44 is omitted. As compared with thegenerator 1 illustrated inFIG. 2 , thegenerator 1 of the present embodiment is different in that thehydrogen supply tube 21 is provided with afluid pressurization pump 29, but thefluid pressurization pump 29 may be omitted as necessary. Other features are the same as those illustrated inFIG. 1 . - In the case of the embodiment illustrated in
FIG. 3 , the value of current flowing through thecathode plate 26 is variable while the opening degree of the flowrate regulating valve 44 is fixed. As described in the above Examples 1 to 24, the correlation coefficient between the pressure of the gas/liquid mixture and the hydrogen concentration is 1 or very close to 1 at a given flow rate of the hydrogen-containing gas from the hydrogen supply source 2 (a given value of current flowing through the cathode plate 26) and a given flow rate of the tap water from theliquid supply source 3. Accordingly, a relational expression thereamong is preliminarily obtained and stored in the ROM of thecalculator 5. When thegenerator 1 for generating a hydrogen-containing liquid is actually used with a fixed value of the opening degree of the flowrate regulating valve 44, the current value detected by thecurrent detector 53 and the water pressure detected by thewater pressure detector 51 are read into thecalculator 5, and the detected current value and the detected pressure are substituted into the relational expression to obtain the hydrogen concentration using the calculation program established in the ROM for obtaining the hydrogen concentration. This obtained hydrogen concentration is presented by thedisplay 6 and the user can thus perceive the hydrogen concentration in the hydrogen-containing liquid from thesupply port 45. -
FIG. 4 is a block diagram illustrating yet another embodiment of agenerator 1 for generating a hydrogen-containing liquid according to the present invention. Thegenerator 1 of the present embodiment is different in that it has a plurality of (two in this example)hydrogen supply sources liquid supply source 3. Thehydrogen supply source 2A is to supply a hydrogen-containing gas and examples thereof include a hydrogen gas cylinder, hydrogen storing alloy, fuel reformer, and electrolyzed water generator. The hydrogen-containing gas supplied from thehydrogen supply source 2A is sent to ajunction part 41A via ahydrogen supply tube 21A. Thehydrogen supply tube 21A is provided with acheck valve 22A, and the hydrogen-containing gas having passed through thecheck valve 22A does not return to thehydrogen supply source 2A. Thehydrogen supply tube 21A may be provided with a fluid pressurization pump to regulate the supply pressure of the hydrogen-containing gas from thehydrogen supply source 2A to thejunction part 41A. Thehydrogen supply source 2B is also to supply a hydrogen-containing gas and examples thereof include a hydrogen gas cylinder, hydrogen storing alloy, fuel reformer, and electrolyzed water generator. The hydrogen-containing gas supplied from thehydrogen supply source 2B is sent to ajunction part 41B via ahydrogen supply tube 21B. Thehydrogen supply tube 21B is provided with acheck valve 22B, and the hydrogen-containing gas having passed through thecheck valve 22B does not return to thehydrogen supply source 2B. Thehydrogen supply tube 21B may be provided with a fluid pressurization pump to regulate the supply pressure of the hydrogen-containing gas from thehydrogen supply source 2B to thejunction part 41B. - The
liquid supply source 3 is to supply a liquid of the intended hydrogen-containing liquid, that is, a liquid to which hydrogen gas is to be dissolved. Examples of the liquid include water such as tap water, beverage, and medicinal liquid. The liquid supplied from theliquid supply source 3 is distributed at midstream of theliquid supply tube 31 and sent to each of the twojunction parts liquid supply tube 31 is provided with adeaeration module 32 and avacuum pump 33. Turning on thevacuum pump 33 to operate thedeaeration module 32 allows gases (mainly oxygen and other gases) to be removed from the liquid supplied from theliquid supply source 3. This operation can enhance the hydrogen concentration because the amount of contact between the liquid and the hydrogen gas increases in the passes from thejunction parts units deaeration module 32 and thevacuum pump 33 may be omitted. Theliquid supply tube 31 may be provided with one or more fluid pressurization pumps to regulate the supply pressure of the liquid from theliquid supply source 3 to each of thejunction parts liquid supply tube 31 may also be provided with a check valve so that the liquid from theliquid supply source 3 does not return thereto. - The
junction part 41A is composed of a piping joint that connects between thehydrogen supply tube 21A and theliquid supply tube 31. The hydrogen-containing gas and liquid reaching thejunction part 41A flow into a gas/liquid mixing pipe 42A and are sent under pressure to the downstream side by afluid pressurization pump 43A provided at the gas/liquid mixing pipe 42A. The gas/liquid mixing pipe 42A is provided with adissolving unit 4A at the downstream side from thefluid pressurization pump 43A. The gas/liquid mixing pipe 42A is also provided with a flowrate regulating valve 44A at the downstream side from thedissolving unit 4A. - The
dissolving unit 4A is a cylindrical body having a larger inner diameter than that of the gas/liquid mixing pipe 42A and comprises a mixing body having fine pores, such as a membrane filter, which is provided inside the cylindrical body. When the gas/liquid mixture of the hydrogen-containing gas and the liquid passes through the fine pores of the membrane filter or the like, the hydrogen-containing gas becomes fine bubbles thereby to increase their surface area in contact with the liquid. Moreover, the hydrogen concentration increases because the hydrogen-containing gas in a form of fine bubbles and the liquid are pressurized in accordance with the pressurizing force by the fluid pressurization pump 43A and the opening degree of the flowrate regulating valve 44A. The hydrogen-containing liquid, which thus has a high concentration, is supplied from asupply port 45 to an intended site. - The
junction part 41B is composed of a piping joint that connects between thehydrogen supply tube 21B and theliquid supply tube 31. The hydrogen-containing gas and liquid reaching thejunction part 41B flow into a gas/liquid mixing pipe 42B and are sent under pressure to the downstream side by afluid pressurization pump 43B provided at the gas/liquid mixing pipe 42B. The gas/liquid mixing pipe 42B is provided with adissolving unit 4B at the downstream side from thefluid pressurization pump 43B. The gas/liquid mixing pipe 42B is also provided with a flowrate regulating valve 44B at the downstream side from the dissolvingunit 4B. - The dissolving
unit 4B is a cylindrical body having a larger inner diameter than that of the gas/liquid mixing pipe 42B and comprises a mixing body having fine pores, such as a membrane filter, which is provided inside the cylindrical body. When the gas/liquid mixture of the hydrogen-containing gas and the liquid passes through the fine pores of the membrane filter or the like, the hydrogen-containing gas becomes fine bubbles thereby to increase their surface area in contact with the liquid. Moreover, the hydrogen concentration increases because the hydrogen-containing gas in a form of fine bubbles and the liquid are pressurized in accordance with the pressurizing force by thefluid pressurization pump 43B and the opening degree of the flowrate regulating valve 44B. The hydrogen-containing liquid, which thus has a high concentration, is supplied from asupply port 45 to an intended site. - The
generator 1 for generating a hydrogen-containing liquid according to the present embodiment comprises, in addition to the above-described configuration,water pressure detectors flow rate detectors calculator 5, and adisplay 6. - The
water pressure detector 51A is provided on the gas/liquid mixing pipe 42A between the fluid pressurization pump 43A and thedissolving unit 4A and detects the water pressure of the hydrogen-containing liquid (gas/liquid mixture of the hydrogen-containing gas and the liquid) which is pressurized by thefluid pressurization pump 43A. The detection signal from thewater pressure detector 51A is read out by thecalculator 5 at a predetermined time interval. In an alternative embodiment, thewater pressure detector 51A may be provided on the gas/liquid mixing pipe 42A between the dissolvingunit 4A and the flowrate regulating valve 44A. Thewater pressure detector 51B is provided on the gas/liquid mixing pipe 42B between thefluid pressurization pump 43B and thedissolving unit 4B and detects the water pressure of the hydrogen-containing liquid (gas/liquid mixture of the hydrogen-containing gas and the liquid) which is pressurized by thefluid pressurization pump 43B. The detection signal from thewater pressure detector 51B is read out by thecalculator 5 at a predetermined time interval. In an alternative embodiment, thewater pressure detector 51B may be provided on the gas/liquid mixing pipe 42B between the dissolvingunit 4B and the flowrate regulating valve 44B. - The
flow rate detector 52A detects the opening degree of the flowrate regulating valve 44A to detect the flow rate of the hydrogen-containing liquid. The detection signal from theflow rate detector 52A is read out by thecalculator 5 at a predetermined time interval. In an alternative embodiment, theflow rate detector 52A may be provided on the gas/liquid mixing pipe 42A between the flowrate regulating valve 44A and thesupply port 45. Theflow rate detector 52B detects the opening degree of the flowrate regulating valve 44B to detect the flow rate of the hydrogen-containing liquid. The detection signal from theflow rate detector 52B is read out by thecalculator 5 at a predetermined time interval. In an alternative embodiment, theflow rate detector 52B may be provided on the gas/liquid mixing pipe 42B between the flowrate regulating valve 44B and thesupply port 45. - The
calculator 5 is composed of a microcomputer that includes a CPU, ROM, and RAM. The ROM also functions as a storage that stores preliminarily-obtained relational information among the flow rate, water pressure, and hydrogen concentration of the hydrogen-containing liquid passing through each of the dissolvingunits - The
display 6 is to present the hydrogen concentration obtained by thecalculator 5. Examples of thedisplay 6 include indicators, such as a seven-segment digital indicator, with which the concentration can be visually recognized and those, such as a speaker, with which the concentration can be audibly perceived. - Also in the
generator 1 for generating a hydrogen-containing liquid of the present embodiment configured as the above, the correlation coefficient between the pressure of the gas/liquid mixture and the hydrogen concentration is very close to 1 at a given flow rate of the hydrogen-containing gas from each of thehydrogen supply sources liquid supply source 3. Accordingly, a relational expression thereamong is preliminarily obtained and stored in the ROM of thecalculator 5. - When the
generator 1 for generating a hydrogen-containing liquid is actually used with a fixed value of the flow rate of the hydrogen-containing gas from each of thehydrogen supply sources flow rate detectors water pressure detectors calculator 5, and the detected flow rate and the detected pressure are substituted into the relational expression to obtain the hydrogen concentration using the calculation program established in the ROM for obtaining the hydrogen concentration. This obtained hydrogen concentration is presented by thedisplay 6 and the user can thus perceive the hydrogen concentration in the hydrogen-containing liquid from thesupply port 45. - Instead, as in the embodiment illustrated in
FIG. 3 , when thegenerator 1 for generating a hydrogen-containing liquid is actually used with a fixed value of the opening degree of each of the flowrate regulating valves water pressure detectors calculator 5, and the detected current value and the detected pressure are substituted into the relational expression to obtain the hydrogen concentration using the calculation program established in the ROM for obtaining the hydrogen concentration. This obtained hydrogen concentration is presented by thedisplay 6 and the user can thus perceive the hydrogen concentration in the hydrogen-containing liquid from thesupply port 45. -
- 1 Generator for a hydrogen-containing liquid
- 2, 2A, 2B Hydrogen supply source
- 21, 21A, 21B Hydrogen supply tube
- 22, 22A, 22B Check valve
- 23 Electrolyzer
- 24 Separating membrane
- 25 Anode plate
- 26 Cathode plate
- 27 DC power source
- 28 Liquid to be electrolyzed
- 29 Fluid pressurization pump
- 3 Liquid supply source
- 31 Liquid supply tube
- 32 Deaeration module
- 33 Vacuum pump
- 4, 4A, 4B Dissolving unit
- 41, 41A, 41B Junction part
- 42, 42A, 42B Gas/liquid mixing pipe
- 43, 43A, 43B Fluid pressurization pump
- 44, 44A, 44B Flow rate regulating valve
- 45 Supply port for hydrogen-containing liquid
- 5 Calculator (calculator, storage)
- 51, 51A, 51B Water pressure detector
- 52, 52A, 52B Flow rate detector
- 53 Current detector (Electric quantity detector)
- 6 Display (Presentation unit)
Claims (9)
1. A method of obtaining a hydrogen concentration in a hydrogen-containing liquid, comprising:
continuously generating the hydrogen-containing liquid by dissolving a hydrogen-containing gas in a continuously flowing liquid;
preliminarily obtaining a relationship among a flow rate and water pressure of the hydrogen-containing liquid and the hydrogen concentration;
detecting the flow rate and water pressure of the hydrogen-containing liquid; and
obtaining the hydrogen concentration on a basis of the detected flow rate and water pressure and the relationship.
2. A method of obtaining a hydrogen concentration in a hydrogen-containing liquid, comprising:
continuously generating the hydrogen-containing liquid by dissolving a hydrogen-containing gas in a continuously flowing liquid of which a flow rate is variable, the hydrogen-containing gas being generated by electrolysis of water;
preliminarily obtaining a relationship among an electric quantity during the electrolysis, a water pressure of the hydrogen-containing liquid, and the hydrogen concentration;
detecting the electric quantity during the electrolysis and the water pressure of the hydrogen-containing liquid when the flow rate of the hydrogen-containing liquid is a fixed value; and
obtaining the hydrogen concentration on a basis of the detected electric quantity and water pressure and the relationship.
3. A method of obtaining a hydrogen concentration in a hydrogen-containing liquid, comprising:
continuously generating the hydrogen-containing liquid by dissolving a hydrogen-containing gas in a continuously flowing liquid of which a flow rate is variable, the hydrogen-containing gas being generated by electrolysis of water;
preliminarily obtaining a relationship among an electric quantity during the electrolysis, a water pressure of the hydrogen-containing liquid, a flow rate of the hydrogen-containing liquid, and the hydrogen concentration;
detecting the electric quantity during the electrolysis, the water pressure of the hydrogen-containing liquid, and the flow rate of the hydrogen-containing liquid; and
obtaining the hydrogen concentration on a basis of the detected electric quantity, water pressure, and flow rate and the relationship.
4. A generator for a hydrogen-containing liquid, comprising:
a hydrogen supply source configured to continuously supply a hydrogen-containing gas;
a liquid supply source configured to continuously supply a liquid;
a dissolving unit configured to dissolve the hydrogen-containing gas in the liquid to continuously generate the hydrogen-containing liquid;
a memory configured to store preliminarily-obtained relational information among a flow rate, water pressure, and hydrogen concentration of the hydrogen-containing liquid passing through the dissolving unit;
a flow rate detector configured to detect the flow rate of the hydrogen-containing liquid;
a water pressure detector configured to detect the water pressure of the hydrogen-containing liquid; and
a calculator configured to obtain the hydrogen concentration on a basis of the detected flow rate and water pressure and the relational information.
5. A generator for a hydrogen-containing liquid, comprising:
a hydrogen supply source configured to continuously supply a hydrogen-containing gas by electrolysis of water;
a liquid supply source configured to continuously supply a liquid of which a flow rate is variable;
a dissolving unit configured to dissolve the hydrogen-containing gas in the liquid to continuously generate the hydrogen-containing liquid;
a memory configured to store preliminarily-obtained relational information among an electric quantity during the electrolysis, a water pressure of the hydrogen-containing liquid passing through the dissolving unit, and a hydrogen concentration of the hydrogen-containing liquid passing through the dissolving unit;
an electric quantity detector configured to detect the electric quantity during the electrolysis when the flow rate of the hydrogen-containing liquid is a fixed value;
a water pressure detector configured to detect the water pressure of the hydrogen-containing liquid when the flow rate of the hydrogen-containing liquid is a fixed value; and
a calculator configured to obtain the hydrogen concentration on a basis of the detected electric quantity and water pressure and the relational information.
6. A generator for a hydrogen-containing liquid, comprising:
a hydrogen supply source configured to continuously supply a hydrogen-containing gas by electrolysis of water;
a liquid supply source configured to continuously supply a liquid;
a dissolving unit configured to dissolve the hydrogen-containing gas in the liquid to continuously generate the hydrogen-containing liquid;
a memory configured to store preliminarily-obtained relational information among an electric quantity during the electrolysis, a water pressure of the hydrogen-containing liquid passing through the dissolving unit, a flow rate of the hydrogen-containing liquid passing through the dissolving unit, and a hydrogen concentration of the hydrogen-containing liquid passing through the dissolving unit;
an electric quantity detector configured to detect the electric quantity during the electrolysis;
a water pressure detector configured to detect the water pressure of the hydrogen-containing liquid;
a flow rate detector configured to detect the flow rate of the hydrogen-containing liquid; and
a calculator configured to obtain the hydrogen concentration on a basis of the detected electric quantity, water pressure, and flow rate and the relational information.
7. The generator for a hydrogen-containing liquid according to claim 4 , further comprising
a presentation unit configured to present the hydrogen concentration obtained by the calculator.
8. The generator for a hydrogen-containing liquid according to claim 5 , further comprising
a presentation unit configured to present the hydrogen concentration obtained by the calculator.
9. The generator for a hydrogen-containing liquid according to claim 6 , further comprising
a presentation unit configured to present the hydrogen concentration obtained by the calculator.
Applications Claiming Priority (2)
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JP2016-095443 | 2016-05-11 | ||
JP2016095443A JP6148759B1 (en) | 2016-05-11 | 2016-05-11 | Method for obtaining hydrogen concentration of hydrogen-containing liquid and hydrogen-containing liquid generator |
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US20170327958A1 true US20170327958A1 (en) | 2017-11-16 |
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ID=59061280
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US15/591,602 Abandoned US20170327958A1 (en) | 2016-05-11 | 2017-05-10 | Method of obtaining hydrogen concentration in hydrogen-containing liquid and generator for hydrogen-containing liquid |
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US (1) | US20170327958A1 (en) |
JP (1) | JP6148759B1 (en) |
KR (1) | KR20170127372A (en) |
CN (1) | CN107449817A (en) |
DE (1) | DE102017110010A1 (en) |
GB (1) | GB2555502B (en) |
TW (1) | TWI629480B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3839101A4 (en) * | 2018-08-13 | 2021-10-20 | Asahi Kasei Kabushiki Kaisha | Water electrolysis apparatus |
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JP6767431B2 (en) * | 2018-06-06 | 2020-10-14 | 株式会社日本トリム | Hydrogen gas melting device |
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JP6196528B2 (en) * | 2013-10-30 | 2017-09-13 | 株式会社日本トリム | Dissolved hydrogen concentration measuring method and electrolyzed water generator |
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2016
- 2016-05-11 JP JP2016095443A patent/JP6148759B1/en active Active
-
2017
- 2017-03-23 TW TW106109685A patent/TWI629480B/en not_active IP Right Cessation
- 2017-05-05 GB GB1707179.6A patent/GB2555502B/en not_active Expired - Fee Related
- 2017-05-09 DE DE102017110010.5A patent/DE102017110010A1/en not_active Withdrawn
- 2017-05-10 KR KR1020170058140A patent/KR20170127372A/en not_active Application Discontinuation
- 2017-05-10 US US15/591,602 patent/US20170327958A1/en not_active Abandoned
- 2017-05-10 CN CN201710327826.2A patent/CN107449817A/en active Pending
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US20050093182A1 (en) * | 2002-05-16 | 2005-05-05 | Kurita Water Industries Ltd | Continuous dissolving device, continuous dissolving method, and gas-dissolved water supply |
US20050121315A1 (en) * | 2003-12-05 | 2005-06-09 | Baltrucki Justin D. | System for generating hydrogen and method thereof |
US20090081497A1 (en) * | 2007-07-24 | 2009-03-26 | Rovcal, Inc | On-demand high energy density hydrogen gas generation device |
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Also Published As
Publication number | Publication date |
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GB2555502B (en) | 2019-07-24 |
TWI629480B (en) | 2018-07-11 |
KR20170127372A (en) | 2017-11-21 |
CN107449817A (en) | 2017-12-08 |
JP6148759B1 (en) | 2017-06-14 |
GB201707179D0 (en) | 2017-06-21 |
DE102017110010A1 (en) | 2017-11-16 |
GB2555502A (en) | 2018-05-02 |
JP2017203690A (en) | 2017-11-16 |
TW201804154A (en) | 2018-02-01 |
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