JP2016077987A - Hydrogen water feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrogen water feeding device capable of feeding hydrogen water of a prescribed concentration or more.SOLUTION: A hydrogen water feeding device 100 includes: hydrogen gas dissolution means 13 which supplies and dissolves hydrogen gas to tap water supplied via a gas separation hollow fiber membrane and generates hydrogen water; water temperature detection means 29 which detects a temperature of inflow tap water; hydrogen gas supply means 10 which can adjust a pressure of hydrogen gas; a tap water flow valve 19 which can control the opening and closing of a tap water inflow path; a hydrogen water take-out valve 16 which can control the opening and closing of a hydrogen water outflow path; water pressure adjusting means 20 of tap water; and control means 30 which controls the hydrogen gas supply means 10 in accordance with a water temperature detected by the water temperature detection means 29 and adjusts a gas pressure of supply hydrogen gas. Therein, in order that the water pressure adjusting means retains a concentration of hydrogen water taken out from a hydrogen water takeout valve in a prescribed concentration or more, a gas pressure of hydrogen gas supplied to the hydrogen gas dissolution means 13 and a water pressure of the tap water supplied to the hydrogen gas dissolution means 13 are controlled into substantially the same pressure with each other when the tap water flow valve 19 and the hydrogen water take-out valve 16 are closed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hydrogen water supply apparatus that can always supply hydrogen water having a predetermined concentration or more generated by dissolving hydrogen gas in tap water.

  As a hydrogen water supply apparatus, there is a hydrogen water server that is directly connected to a water supply and configured to be able to take out hydrogen water as needed. This hydrogen water server is configured to dissolve hydrogen gas in the circulated tap water, store the obtained hydrogen water in the hydrogen water storage tank, and take out the hydrogen water from this hydrogen water storage tank as needed. ing.

  Moreover, there exists a hydrogen water production apparatus that employs a gas-permeable hollow fiber membrane as an apparatus for producing cleaning hydrogen water used in the electronics industry or the like (for example, Patent Document 1). The hydrogen water production apparatus described in Patent Document 1 supplies ultrapure water and hydrogen gas to a hydrogen gas dissolving apparatus having a gas permeable hollow fiber membrane, and the hydrogen gas is converted into ultrapure water in the hydrogen gas dissolving apparatus. The amount of hydrogen gas supplied into the hydrogen gas dissolving device is controlled based on the hydrogen gas concentration detected using a polarograph-type dissolved hydrogen meter. . The hydrogen water producing apparatus described in Patent Document 1 is an industrial hydrogen water producing apparatus for supplying a large amount and continuously hydrogen water for cleaning having a relatively high dissolved hydrogen concentration.

Japanese Patent Application Laid-Open No. 2004-89871

  According to the device that extracts hydrogen water from a hydrogen water storage tank like a conventional hydrogen water server, the hydrogen water storage tank has a vent and is open to the atmosphere, so oxygen in the atmosphere dissolves or exceeds atmospheric pressure Therefore, it was very difficult to maintain the dissolved hydrogen concentration of hydrogen water at a high concentration exceeding 1.6 mg / L, which is the saturated concentration at atmospheric pressure.

  In this type of hydrogen water server, tap water itself has been sterilized such as chlorine disinfection from the viewpoint of hygiene. However, since the hydrogen water storage tank is open to the atmosphere, various germs enter the system. Bacteria contamination was easy to occur by circulating.

  Furthermore, in the hydrogen water server for drinks which can take out hydrogen water used for drinks at any time, it is difficult to adjust the intermittent supply of hydrogen gas, and for example, hydrogen water has not been taken out for a long time such as 12 hours. The dissolved hydrogen concentration at the subsequent start-up could not be higher than the saturated concentration at atmospheric pressure of 1.6 mg / L. In this type of drinking hydrogen water server, a gas separation hollow fiber membrane (gas separation membrane) for dissolving hydrogen gas is not used.

  On the other hand, the industrial hydrogen water production apparatus described in Patent Document 1 adjusts the hydrogen gas pressure using a dedicated polarograph-type dissolved hydrogen meter in order to continuously produce and supply a large amount of water. However, it is difficult to apply this configuration to a hydrogen water server that can take out hydrogen water at any time, such as a hydrogen water vending machine. The reason is that a dedicated polarograph-type dissolved hydrogen meter has the shortest response speed of 20 seconds from hydrogen gas permeation to detection, whereas a hydrogen water vending machine once in 20 seconds. This is because of the sale of hydrogen water. That is, it is impossible to always supply hydrogen water having a constant concentration by detecting the dissolved hydrogen concentration with this type of dissolved hydrogen meter and adjusting the hydrogen gas pressure.

  Accordingly, an object of the present invention is to provide a hydrogen water supply apparatus that can always obtain hydrogen water having a predetermined concentration or higher even if an arbitrary amount of hydrogen water is taken out at an arbitrary time.

  The hydrogen water supply apparatus of the present invention is a hydrogen water supply apparatus that is directly connected to water and through which tap water is passed. The hydrogen water supply device is configured to generate hydrogen water by supplying tap water and hydrogen gas and dissolving the supplied hydrogen gas in tap water supplied through a gas separation hollow fiber membrane. The hydrogen gas dissolving means, the water temperature detecting means for detecting the temperature of the tap water supplied in the water inflow passage of the hydrogen gas dissolving means, the hydrogen gas being supplied to the hydrogen gas dissolving means and the hydrogen gas supplied A hydrogen gas supply means capable of variably adjusting the gas pressure, a tap water flow valve capable of opening / closing a tap water inflow path from the water supply, and a hydrogen water extraction valve capable of opening / closing a hydrogen water outflow path of the hydrogen gas dissolving means; The water pressure adjusting means configured to adjust the water pressure of the tap water supplied to the hydrogen gas dissolving means, and the hydrogen supplied by controlling the hydrogen gas supplying means according to the water temperature detected by the water temperature detecting means Gas gas And a configured control means to adjust the. The water pressure adjusting means includes the gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means, the tap water flow valve and the hydrogen water take-out so as to maintain the concentration of the hydrogen water taken out from the hydrogen water take-out valve above a predetermined concentration. When the valve is closed, the water pressure of the tap water supplied to the hydrogen gas dissolving means is controlled to be substantially the same pressure.

  The gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means and the water pressure of the tap water supplied to the hydrogen gas dissolving means when the tap water passage valve and the hydrogen water take-off valve are closed are substantially the same pressure. Be controlled. Thereby, even if an arbitrary amount of hydrogen water is taken out at an arbitrary time, hydrogen water having a predetermined concentration or more can always be obtained. Further, when the water temperature changes, the saturated dissolved hydrogen concentration in the tap water changes, as well as the hydrogen gas permeation amount in the gas separation hollow fiber membrane greatly changes. That is, when the water temperature is low, the membrane contracts and the gas permeation amount decreases, and when the water temperature is high, the gas permeation amount increases due to membrane swelling. Thus, as in the present invention, the hydrogen gas permeation amount in the gas separation hollow fiber membrane is controlled to be constant by adjusting the gas pressure of the hydrogen gas supplied according to the water temperature. Thereby, even if there exists a change of water temperature, hydrogen water more than predetermined concentration can be obtained.

  The hydrogen gas supply means includes a hydrogen gas generator that generates hydrogen gas by electrolysis, and the control means is within a range defined by the water temperature at which the gas pressure of the hydrogen gas supplied to the hydrogen gas dissolution means is detected. It is preferable that the electrolysis of the hydrogen gas generator is controlled so as to be within the range. By using such a hydrogen gas generator by electrolysis, it is not necessary to replace the hydrogen gas cylinder, and stable hydrogen gas can be supplied to the hydrogen gas melting means. In addition, since the configuration in which the gas pressure is controlled by controlling the electrolysis of the hydrogen gas generator in this way is simple, the manufacturing cost is low.

  A hydrogen gas generator in which hydrogen gas supply means generates hydrogen gas by electrolysis, a hydrogen gas storage tank that maintains the gas pressure of the generated hydrogen gas at a constant pressure, and a gas pressure of hydrogen gas from the hydrogen gas storage tank. Gas pressure adjusting means for controlling, and the control means controls the gas pressure adjusting means so that the gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means falls within a range defined by the detected water temperature. It is also preferable to be configured to do so. By using such a hydrogen gas generator by electrolysis, it is not necessary to replace the hydrogen gas cylinder, and stable hydrogen gas can be supplied to the hydrogen gas melting means.

  The hydrogen gas supply means includes a hydrogen gas cylinder and a gas pressure adjusting means for controlling the gas pressure of the hydrogen gas from the hydrogen gas cylinder, and the control means detects the gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means. It is also preferable that the gas pressure adjusting means is controlled so as to be within a range defined by the set water temperature. If a hydrogen gas cylinder is used, an electrolysis apparatus becomes unnecessary, and the apparatus configuration is simplified accordingly.

  A first stop pressure adjusting valve in which the water pressure adjusting means is provided in the tap water inflow path from the water supply and / or a second stop pressure adjusting valve provided in the drainage path from the tap water inflow path of the hydrogen gas dissolving means. And adjusting the first stop pressure adjusting valve or the second stop pressure adjusting valve to adjust the gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means, the tap water flow valve, and the hydrogen water extraction. It is also preferable that the tap water supplied to the hydrogen gas dissolving means is controlled to have substantially the same pressure when the valve is closed.

  In this case, the control means includes the gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means and the water pressure of the tap water supplied to the hydrogen gas dissolving means when the tap water passage valve and the hydrogen water take-off valve are closed. It is also preferable that the first stop pressure adjusting valve and / or the second stop pressure adjusting valve be controlled so that the pressures are substantially equal to each other.

  It is further provided with a dissolved oxygen removing means for removing at least a part of the dissolved oxygen of tap water, and configured to supply the tap water from which dissolved oxygen has been removed by the dissolved oxygen removing means to the hydrogen gas dissolving means. Is also preferable. Thereby, the dissolved hydrogen concentration of the hydrogen water to be taken out can be kept high.

  It is also preferable that a cooling means for cooling the tap water to a predetermined temperature is further provided so that the tap water cooled by the cooling means is supplied to the hydrogen gas dissolving means. Thereby, since the water temperature is controlled to be constant, control of the pressure related to the water temperature can be simplified, hydrogen water with a high dissolved hydrogen concentration can be always supplied, and cold hydrogen water for beverages can be provided.

  The control means is preferably configured to control the cooling means in accordance with the detected water temperature so that the temperature of the tap water supplied to the hydrogen gas dissolving means is maintained at a predetermined temperature. By controlling the cooling means according to the supplied water temperature, more accurate water temperature control can be performed.

  According to the present invention, even when an arbitrary amount of hydrogen water is taken out at an arbitrary time point, hydrogen water having a predetermined concentration or more can always be supplied. Moreover, even if there is a change in the water temperature, hydrogen water having a predetermined concentration or more can be obtained.

It is a block diagram showing roughly the whole composition of the hydrogen water supply device concerning a 1st embodiment of the present invention. It is a flowchart which shows the flow of an example of the gas pressure control program of the control circuit in embodiment of FIG. It is a figure which shows the relationship between water temperature, a gas pressure upper limit, and a gas pressure lower limit. It is a flowchart which shows the flow of an example of the water pressure control program of the control circuit in embodiment of FIG. It is a block diagram which shows roughly the whole structure of the hydrogenous water supply apparatus which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the flow of an example of the gas pressure control program of the control circuit in embodiment of FIG. It is a block diagram which shows roughly the whole structure of the hydrogenous water supply apparatus which concerns on the 3rd Embodiment of this invention. It is a block diagram which shows roughly the whole structure of the hydrogenous water supply apparatus which concerns on the 4th Embodiment of this invention. It is a figure which shows the relationship between the hydrogen gas pressure by a water temperature change, and dissolved hydrogen concentration. It is a figure which shows the relationship between a hydrogen gas pressure and dissolved hydrogen concentration in the case of having dissolved oxygen removal means. It is a figure which shows the water-collection test result at the time of controlling hydrogen gas pressure with temperature. It is a figure which shows the water sampling test result at the time of having remove | deviated from the hydrogen gas pressure control value by temperature.

  FIG. 1 schematically shows the entire configuration of a hydrogen water supply apparatus 100 according to a first embodiment of the present invention. The hydrogen water supply apparatus 100 according to the present embodiment is directly connected to a water supply, and produces hydrogen water by dissolving hydrogen gas in tap water supplied from the water supply. The hydrogen water supply apparatus 100 is used in a hydrogen water vending machine. be able to.

  As shown in the figure, a hydrogen water supply device 100 includes a hydrogen gas generation device 10 composed of an electrolysis device, and a gas inlet connected to the hydrogen gas generation device 10 via a check valve 11 and a flow path 12. Hydrogen gas dissolving means 13, hydrogen gas inlet pressure gauge 14 provided in the flow path 12, and hydrogen water removal valve (electromagnetic valve) 16 connected to the hydrogen water outlet of the hydrogen gas dissolving means 13 via the flow path 15. And a hydrogen water outlet pressure gauge 17 provided in the flow passage 15 and a flow passage 18 which is provided in the flow passage 18 which is the first tap water inflow passage from the water supply and controls the opening and closing of the flow passage 18 ( Solenoid valve 19, a pressure reducing valve 20 provided downstream of the tap water flow valve 19 in the flow path 18, a flow rate adjusting valve 21 provided downstream of the pressure reducing valve 20 in the flow path 18, The tap water inlet pressure gauge 22 provided in the channel 18 and the flow of the channel 18 A tap water filter F provided downstream of the adjustment valve 21 and a first stop pressure adjustment valve provided in the flow path 23 which is a second tap water inflow path from the water supply and controls the opening and closing of the flow path 23. (Electromagnetic valve) 24, a first constant flow valve 25 provided downstream of the first stop pressure regulating valve 24 in the flow path 23, and a flow path 18 downstream of the first constant flow valve 25. The tap water filter F, the second constant flow valve 27 provided in the downstream flow path 26 of the tap water filter F, and the second constant flow valve 27 of the flow path 26 are provided downstream of the second constant flow valve 27. A second stop pressure adjusting valve (solenoid valve) 28 for controlling the opening and closing of the flow path 26 and a flow path 26 connected to the outlet of the tap water filter F and the tap water inlet of the hydrogen gas dissolving means 13 are provided. Water temperature detection means 29, hydrogen gas generator 10, hydrogen water take-off valve 16, water temperature detection means 29, Michisuidori water valve 19, and a first stop pressure regulating valve 24 and the second stop pressure regulating valve 28 is electrically connected the control circuit 30 (corresponding to the control means of the present invention). The control circuit 30 is also electrically connected to the tap water inlet pressure gauge 22, the hydrogen water outlet pressure gauge 17, and the hydrogen gas inlet pressure gauge 14.

  The hydrogen gas generation device 10 is an electrolysis device configured to generate hydrogen gas by electrolysis of water. This electrolysis apparatus can electrolyze water as much as necessary to generate hydrogen gas, and can supply hydrogen gas safely and conveniently with a simple operation. The control circuit 30 controls the start and stop (on / off) of the electrolysis by the hydrogen gas generator 10, whereby the hydrogen gas pressure is adjusted.

  The hydrogen gas dissolving means 13 dissolves the supplied hydrogen gas in water via a gas separation hollow fiber membrane. In this embodiment, a hollow fiber gas separation membrane (M60-6000GE) manufactured by Nagayanagi Industry Co., Ltd. is used. ) Is used. As described above, the water temperature detecting means 29 is connected to the flow path 26 connected to the water inlet of the hydrogen gas dissolving means 13. Further, a hydrogen gas inlet pressure gauge 14 and a check valve 11 are connected to the flow path 12 connected to the gas inlet of the hydrogen gas dissolving means 13. Further, a hydrogen water outlet pressure gauge 17 and a hydrogen water take-off valve 16 are connected to the flow path 15 connected to the hydrogen water outlet of the hydrogen gas dissolving means 10.

  In the present embodiment, the hydrogen gas supply means of the present invention is composed of a hydrogen gas generator 10 that is an electrolyzer controlled to be turned on and off by a control circuit 30. As the gas pressure control, the control circuit 30 controls the hydrogen gas generator 10 so that the supplied gas pressure falls within a predetermined range defined by the tap water temperature T detected by the water temperature detecting means 29. Is configured to do. That is, the permeation state of hydrogen gas and the dissolved concentration state of hydrogen gas vary depending on the temperature of the water flowing into the gas separation hollow fiber membrane in the hydrogen gas dissolving means 13, so that the tap water flowing into the hydrogen gas dissolving means 13 The hydrogen gas pressure supplied to the hydrogen gas dissolving means 13 is controlled by on / off controlling the electrolysis of the hydrogen gas generator 10 according to the water temperature T. Specifically, an upper limit pressure value and a lower limit pressure value determined in advance according to the water temperature T are obtained from a mathematical formula or a table, and electrolysis is performed until the gas pressure P3 detected by the hydrogen gas inlet pressure gauge 14 reaches the upper limit pressure value. (Maintaining ON), electrolysis is stopped (turned off) when the pressure P3 reaches the upper limit pressure value, and electrolysis is restarted (turned on) when the pressure P3 reaches the lower limit pressure value .

  The reason why the gas pressure needs to be adjusted according to the water temperature is that (1) the saturated dissolved hydrogen concentration in the water changes depending on the water temperature, and (2) the gas permeation amount of the hollow fiber membrane for dissolving hydrogen gas is larger depending on the water temperature. Because it changes. In order to obtain a desired concentration by dissolving hydrogen gas in tap water in which oxygen gas or nitrogen gas is dissolved, the pressure for hydrogen water and the amount of hydrogen gas supplied are taken into account, and a hollow for dissolving hydrogen gas is used. It is necessary to consider that the gas permeation amount of the yarn membrane varies with the water temperature. That is, if the water temperature is low, the membrane contracts and the gas permeation amount decreases, and if the water temperature is high, the gas permeation amount increases due to the membrane swelling. Adjust the supply pressure.

  The hydrogen water take-off valve 16 is opened and closed by a control circuit 30 so as to be opened when taking out the hydrogen water generated by the hydrogen gas dissolving means 13 and closed when controlling the inside of the hydrogen gas dissolving means 13 to an equilibrium state. It is a solenoid valve to be controlled. The hydrogen water take-off valve 16 is installed on the downstream side of the hydrogen water outlet pressure gauge 15 as described above, and may be configured to be manually controlled when taking out the hydrogen water.

  The tap water flow valve 19 is opened and closed by the control circuit 30 so as to open when supplying tap water to the hydrogen gas dissolving means 13 and to close when controlling the hydrogen gas dissolving means 13 in an equilibrium state. Is a solenoid valve. As described above, the tap water flow valve 19 is installed in the flow path 18 that is the first tap water inflow path from the water supply.

  The water temperature detecting means 29 is a water temperature sensor installed in the flow path 26 on the water inlet side of the hydrogen gas dissolving means 13, and the temperature T of the supplied tap water, that is, the gas separation hollow fiber of the hydrogen gas dissolving means 13. The temperature of water applied to the membrane is detected and a water temperature signal is output. The water temperature signal detected by the water temperature detecting means 13 is sent to the control circuit 30.

  The water pressure adjusting means of the present invention includes a first stop pressure adjusting valve 24 and a second stop pressure adjusting valve 28 controlled by a control circuit 30, a first constant flow valve 25 and a second constant flow valve 27. It is composed of As the water pressure control, the control circuit 30 controls the tap water flow valve 19 and the hydrogen water take-off valve 16 (and the first stop pressure adjusting valve) so as to keep the concentration of the hydrogen water taken out from the hydrogen water take-off valve 16 at a predetermined concentration or higher. 24 and the second stop pressure adjusting valve 28) are closed such that the water pressure P1 detected by the tap water inlet pressure gauge 22 and the gas pressure P3 detected by the hydrogen gas inlet pressure gauge 14 are substantially equal. An equilibrium state is realized by controlling the first stop pressure adjusting valve 24 or the second stop pressure adjusting valve 28 which is a water pressure adjusting means.

  The control circuit 30 includes, for example, a CPU, a ROM, a RAM, an operation unit, and a display unit. The CPU controls the operation of the hydrogen water supply apparatus 100 using the RAM as a work area according to a control program stored in the ROM or RAM. Detection signals from the hydrogen gas inlet pressure gauge 14, the hydrogen water outlet pressure gauge 17, the water temperature detecting means 29, the tap water inlet pressure gauge 22, and the tap water water flow valve 19 are input to the control circuit 30 to generate hydrogen gas. Drive signals are output to the device 10, the hydrogen water take-off valve 16, the tap water flow valve 19, the first stop pressure adjustment valve 24, and the second stop pressure adjustment valve 28.

  Hereinafter, the operation of the hydrogen water supply apparatus 100 in the present embodiment will be described.

  The extraction of hydrogen water from the hydrogen water supply apparatus 100 is performed by opening the hydrogen water extraction valve 16 automatically or manually. For example, when taking out 500 mL of hydrogen water at a time in a vending machine, the hydrogen water take-off valve 16 may be opened for 20 seconds if the hydrogen water has a flow rate of 1.5 L / min. .

  At the position of the hydrogen water take-off valve 16, hydrogen water having a flow rate of 1.5 L / min can be obtained in a dissolved state with a dissolved hydrogen concentration of 1.6 mg / L or higher, which is a saturated concentration at atmospheric pressure, regardless of the water temperature. Furthermore, the hydrogen gas pressure P3 supplied to the gas separation hollow fiber membrane of the hydrogen gas dissolving means 13 is adjusted. Hereinafter, this gas pressure control will be described.

  FIG. 2 shows a flow of an example of the gas pressure control program of the control circuit 30.

  First, the CPU reads a water temperature signal from the water temperature detecting means 29 (step S1). It is assumed that this water temperature signal is converted into digital data by a known method.

  Next, an upper limit pressure value and a lower limit pressure value of the gas pressure corresponding to the water temperature are obtained (step S2). In the ROM or RAM, the relationship between the upper limit pressure value and the lower limit pressure value corresponding to the water temperature as shown in FIG. 3 is stored as a table or as a line format. In step S2, calculation is performed using this table or line format. Is done. In the case of a linear format, the upper limit pressure value (MPa) = − 0.0019 × water temperature (° C.) − 0.20 (y = 0.0001x−0.20), the lower limit pressure value (MPa) = − 0.0019 × water temperature Calculated from (° C.) − 0.19 (y = 0.0001x−0.19).

  Next, an instruction is output to the hydrogen gas generator 10 to start electrolysis (step S3).

  Next, it is determined whether or not the gas pressure P3 detected by the hydrogen gas inlet pressure gauge 14 exceeds the upper limit pressure value (step S4). When the gas pressure P3 exceeds (exceeds) the upper limit pressure value (in the case of YES), the electrolysis is stopped (step S5).

  When the gas pressure P3 does not exceed the upper limit pressure value (in the case of NO), it is determined whether or not the gas pressure P3 exceeds the lower limit pressure value (step S6). When the gas pressure P3 exceeds (below) the lower limit pressure value (in the case of YES), electrolysis is restarted (step S7), and this gas pressure control process is terminated. Also when the gas pressure P3 does not exceed the lower limit pressure value (in the case of NO), this gas pressure control process is terminated.

  By the above gas pressure control, the hydrogen gas pressure P3 supplied to the gas separation hollow fiber membrane of the hydrogen gas dissolving means 13 is controlled within a range defined by an upper limit pressure value and a lower limit pressure value that change according to the water temperature. The

  Hydrogen water in the hydrogen water take-out system is always taken out in a dissolved state with a dissolved hydrogen concentration of 1.6 mg / L or more, which is a saturated concentration at atmospheric pressure. In order to allow hydrogen water to flow at a flow rate of 1.5 L / min, it is necessary that some pressure P2 exists at the position of the hydrogen water outlet pressure gauge 17. Further, a pressure difference during water flow occurs before and after the gas separation hollow fiber membrane of the hydrogen gas dissolving means 13. When the tap water flow valve 19 and the hydrogen water take-off valve 16 are closed, the hydrogen gas pressure P3 at the position of the hydrogen gas inlet pressure gauge 14 is the pressure on the water side of the gas separation hollow fiber membrane of the hydrogen gas dissolving means 13. If it is substantially equal to P1, a large amount of hydrogen gas does not flow to the water side, and the water in the gas separation hollow fiber membrane has a dissolved hydrogen concentration of 1.6 mg / L or more which is a saturated concentration at atmospheric pressure. Held in. For this reason, even at the start of operation when the hydrogen water take-off valve 16 is opened, it is possible to immediately supply hydrogen water having a dissolved hydrogen concentration of 1.6 mg / L or more. Hereinafter, this water pressure control will be described.

  FIG. 4 shows a flow of an example of the water pressure control program of the control circuit 30.

  First, the CPU closes the tap water flow valve 19, the hydrogen water take-off valve 16, the first stop pressure adjusting valve 24, and the second stop pressure adjusting valve 28 (step S11).

  Next, it is determined whether or not the water pressure P1 detected by the water inlet pressure gauge 22 and the gas pressure P3 detected by the hydrogen gas inlet pressure gauge 14 are substantially equal (P3≈P1) (step S12).

  If P3≈P1 is not satisfied (NO), it is determined whether or not the gas pressure P3 is greater than the water pressure P1 (P3> P1) (step S13). When the gas pressure P3 is larger (in the case of YES), the first stop pressure adjusting valve 24 is controlled to take in more tap water and adjust the water pressure so that the water pressure P1 becomes larger (step S14). On the other hand, when the gas pressure P3 is not larger (in the case of NO), the second stop pressure adjusting valve 28 is controlled to drain the tap water, and the water pressure is adjusted so that the water pressure P1 becomes smaller (step S15).

  Thereafter, it is determined whether or not the water pressure P1 and the gas pressure P3 are substantially equal (P3≈P1) (step S16). When P3≈P1 is not satisfied (in the case of NO), the process returns to step S13 and the processes of steps S13 to S16 are repeated.

  In step S12 or S16, when P3≈P1 (in the case of YES), this water pressure control process is terminated.

  By the above water pressure control, the tap water side pressure P1 when the tap water flow valve 19, the hydrogen water take-off valve 16, the first stop pressure adjusting valve 24 and the second stop pressure adjusting valve 28 are closed. Is adjusted to the equilibrium pressure with the gas pressure P3 of hydrogen gas. In this case, the pressure P1 of the water inlet pressure gauge 22 and the pressure P2 of the hydrogen water outlet pressure gauge 17 are the same. In the illustrated example, a first constant flow valve 25 is provided downstream of the first stop pressure adjustment valve 24, and a second stop pressure adjustment valve 28 is provided downstream of the second constant flow valve 27. However, there is no restriction on the context of the installation positions of the first stop pressure adjusting valve and the first constant flow valve, and the context of the installation positions of the second stop pressure adjusting valve and the second constant flow valve, Any context may be used.

  When the hydrogen water take-off valve 16 is opened and the hydrogen water is taken out, the tap water side pressure P1 is adjusted by the water flow permeation resistance of the tap water filter F or the like so that the pressure difference at the time of water flow is generated. To do. If the desired pressure cannot be adjusted even by adjusting these water flow resistances, the flow rate adjusting valve 21 is used.

  Further, permeation pressure is required for permeation of hydrogen gas through the gas separation hollow fiber membrane of the hydrogen gas dissolving means 13, and the pressure P2 in the hydrogen water outlet pressure gauge 17 and the pressure P3 in the hydrogen gas inlet pressure gauge 14 are Even if equal, the permeation pressure acts, so that hydrogen gas does not flow into the water side. The pressure P3 in the hydrogen gas inlet pressure gauge 14 is {(hydrogen in a state where the tap water flow valve 19, the hydrogen water discharge valve 16, the first stop pressure adjusting valve 24 and the second stop pressure adjusting valve 28 are closed. When the pressure at the water outlet pressure gauge 17 becomes P2)-(gas permeation pressure)} or less, dissolved gas (oxygen and nitrogen) in water enters the hydrogen side in large quantities from the water side, and the purity of the hydrogen gas It is not preferable because it decreases. According to the experiments by the inventors of the present application, the gas permeation pressure difference allowed by the control was 0.02 MPa.

  As described above, according to the present embodiment, the control means 30 maintains the dissolved hydrogen concentration of the hydrogen water taken out from the hydrogen water take-off valve 16 at 1.6 mg / L or more, which is the saturated concentration at atmospheric pressure. As described above, based on the temperature of the water detected by the water temperature detection means 29, the hydrogen gas generator 10 as the hydrogen gas supply means is controlled, and the gas pressure P3 of the hydrogen gas, the tap water flow valve 19, the hydrogen water extraction By controlling the water pressure adjusting means so that the water pressure when the valve 16, the first stop pressure adjusting valve 24 and the second stop pressure adjusting valve 28 are closed is substantially the same, it is arbitrary at any time Even if this amount of hydrogen water is taken out, hydrogen water with a high dissolved hydrogen concentration can always be supplied.

  FIG. 5 schematically shows the overall configuration of the hydrogen water supply apparatus 200 according to the second embodiment of the present invention. The hydrogen water supply apparatus 200 of the present embodiment is also directly connected to the water supply, and produces hydrogen water by dissolving hydrogen gas in the tap water supplied from the water supply, and is used for a hydrogen water vending machine. be able to.

  As shown in the figure, the hydrogen water supply device 200 includes a hydrogen gas generator 10 comprising an electrolyzer, a hydrogen gas storage tank 31 with a pressure gauge 31a that maintains the gas pressure of the generated hydrogen gas at a constant pressure, and A gas pressure adjusting valve (solenoid valve) 32 connected to the hydrogen gas storage tank 31 via the check valve 11 and the flow path 12 and a second flow path 12 provided downstream of the gas pressure adjusting valve 32. 3 constant flow valve 33, a hydrogen gas dissolving means 13 having a gas inlet connected to the third constant flow valve 33 via the flow path 12, a hydrogen gas inlet pressure gauge 14 provided in the flow path 12, A hydrogen water outlet valve (solenoid valve) 16 connected to the hydrogen water outlet of the hydrogen gas dissolving means 13 via the flow path 15, a hydrogen water outlet pressure gauge 17 provided in the flow path 15, and a first from the water supply Provided in the flow path 18 which is the tap water inflow path of A tap water flow valve (solenoid valve) 19 that controls the opening and closing of the passage 18, a pressure reducing valve 20 provided downstream of the tap water flow valve 19 in the flow path 18, and a downstream position of the pressure reducing valve 20 in the flow path 18. A flow rate adjusting valve 21 provided in the channel 18, a tap water inlet pressure gauge 22 provided in the flow channel 18, a tap water filter F provided downstream of the flow rate adjusting valve 21 in the flow channel 18, and a water supply A first stop pressure adjusting valve (solenoid valve) 24 that opens and closes the flow path 23, and a first stop pressure adjustment of the flow path 23. A first constant flow valve 25 provided downstream of the valve 24, a tap water filter F provided in a flow path 18 downstream of the first constant flow valve 25, and a downstream flow of the tap water filter F A second constant flow valve 27 provided in the passage 26 and a downstream of the second constant flow valve 27 in the flow passage 26 are provided. A second stop pressure adjusting valve (solenoid valve) 28 for controlling the opening and closing of the flow path 26, a second constant flow valve 27 provided in the flow path 26 downstream of the first constant flow valve 25, and this flow A second stop pressure adjusting valve (solenoid valve) 28 that is provided downstream of the second constant flow valve 27 in the passage 26 and controls the opening and closing of the passage 26, the outlet of the tap water filter F, and the hydrogen gas dissolving means 13. The water temperature detecting means 29 provided in the flow path 26 connected to the tap water inlet, the gas pressure adjusting valve 32, the hydrogen water take-off valve 16, the water temperature detecting means 29, the tap water flow valve 19, the first stop pressure. And a control circuit 30 (corresponding to the control means of the present invention) electrically connected to the regulating valve 24 and the second stop pressure regulating valve 28. The control circuit 30 is also electrically connected to the tap water inlet pressure gauge 22, the hydrogen water outlet pressure gauge 17, and the hydrogen gas inlet pressure gauge 14.

  The hydrogen gas generation device 10 is an electrolysis device configured to generate hydrogen gas by electrolysis of water. This electrolysis apparatus can electrolyze water as much as necessary to generate hydrogen gas, and can supply hydrogen gas safely and conveniently with a simple operation.

  In this embodiment, the hydrogen gas supply means of the present invention is a gas controlled by a hydrogen gas generator 10, a hydrogen gas storage tank 31 that maintains the gas pressure of the generated hydrogen gas at a constant pressure, and a control circuit 30. And a pressure regulating valve 32. As the gas pressure control, the control circuit 30 controls the gas pressure adjustment valve 32 so that the supplied gas pressure falls within a predetermined range defined by the tap water temperature T detected by the water temperature detecting means 29. Is configured to do. That is, the permeation state of hydrogen gas and the dissolved concentration state of hydrogen gas vary depending on the temperature of the water flowing into the gas separation hollow fiber membrane in the hydrogen gas dissolving means 13, so that the tap water flowing into the hydrogen gas dissolving means 13 The hydrogen gas pressure supplied to the hydrogen gas dissolving means 13 is controlled by on / off controlling the gas pressure adjusting valve 32 according to the water temperature T of the gas. Specifically, an upper limit pressure value and a lower limit pressure value determined in advance according to the water temperature T are obtained from a mathematical formula or a table, and the gas pressure until the gas pressure P3 detected by the hydrogen gas inlet pressure gauge 14 reaches the upper limit pressure value. The adjustment valve 32 is opened, the gas pressure adjustment valve 32 is closed when the pressure P3 reaches the upper limit pressure value, and the gas pressure adjustment valve 32 is opened again when the pressure P3 reaches the lower limit pressure value. In this case, in order to prevent the output gas pressure P4 of the hydrogen gas storage tank 31 from being applied to the hydrogen gas dissolving means 13 at once, a constant flow valve (in the case of FIG. It is desirable to provide a flow valve 33) to reduce the pressure.

  The configurations of the hydrogen gas dissolving means 13, the hydrogen water take-off valve 16, the tap water flow valve 19, the water temperature detecting means 29, and the water pressure adjusting means in the present embodiment are the same as in the case of the first embodiment and will be described. Omitted. The control circuit 30 in the present embodiment is different only in the gas pressure control process, and the other configurations are the same as those in the first embodiment.

  FIG. 6 shows a flow of an example of the gas pressure control program of the control circuit 30.

  First, the CPU reads a water temperature signal from the water temperature detecting means 29 (step S21). It is assumed that this water temperature signal is converted into digital data by a known method.

  Next, an upper limit pressure value and a lower limit pressure value of the gas pressure corresponding to the water temperature are obtained (step S22). In the ROM or RAM, the relationship between the upper limit pressure value and the lower limit pressure value corresponding to the water temperature as shown in FIG. 3 is stored as a table or in a line format. In step S22, calculation is performed using this table or line format. Is done. In the case of a linear format, the upper limit pressure value (MPa) = − 0.0019 × water temperature (° C.) − 0.20 (y = 0.0001x−0.20), the lower limit pressure value (MPa) = − 0.0019 × water temperature Calculated from (° C.) − 0.19 (y = 0.0001x−0.19).

  Next, an instruction is output to the gas pressure adjusting valve 32 to perform on / off control (step S23).

  Next, it is determined whether or not the gas pressure P3 detected by the hydrogen gas inlet pressure gauge 14 is within the range between the upper limit pressure value and the lower limit pressure value (including the upper limit pressure value and the lower limit pressure value) (step S24). When the gas pressure P3 is not within the range of the upper limit pressure value and the lower limit pressure value (in the case of NO), the process returns to step S23 and the control by the gas pressure adjustment valve 32 is performed. When the gas pressure P3 is in the range between the upper limit pressure value and the lower limit pressure value (in the case of YES), this gas pressure control process is terminated.

  By the above gas pressure control, the hydrogen gas pressure P3 supplied to the gas separation hollow fiber membrane of the hydrogen gas dissolving means 13 is controlled within a range defined by an upper limit pressure value and a lower limit pressure value that change according to the water temperature. The

  Other operations in the present embodiment are the same as those in the first embodiment.

  As described above, according to the present embodiment, the control means 30 maintains the dissolved hydrogen concentration of the hydrogen water taken out from the hydrogen water take-off valve 16 at 1.6 mg / L or more, which is the saturated concentration at atmospheric pressure. As described above, based on the temperature of the water detected by the water temperature detecting means 29, the gas pressure adjusting valve 32 which is a part of the hydrogen gas supplying means is controlled, and the gas pressure P3 of the hydrogen gas and the tap water flow valve 19, By controlling the water pressure adjusting means so that the water pressure when the hydrogen water take-out valve 16, the first stop pressure adjusting valve 24 and the second stop pressure adjusting valve 28 are closed is substantially the same, any arbitrary pressure can be obtained. Even if an arbitrary amount of hydrogen water is taken out at the time, hydrogen water having a high dissolved hydrogen concentration can always be supplied.

  As the hydrogen gas generator 10, an apparatus that generates hydrogen gas stored in a high-pressure gas container such as a hydrogen gas cylinder may be used instead of the electrolyzer. As described above, the gas pressure can be controlled by controlling the gas pressure using the gas pressure adjusting valve 32.

  FIG. 7 schematically shows the overall configuration of a hydrogen water supply apparatus 300 according to the third embodiment of the present invention. The hydrogen water supply apparatus 300 of the present embodiment is also directly connected to the water supply, and produces hydrogen water by dissolving hydrogen gas in the tap water supplied from the water supply, and is used for a hydrogen water vending machine. be able to.

  As shown in the figure, a hydrogen water supply apparatus 300 includes a hydrogen gas generation apparatus 10 composed of an electrolysis apparatus, and a gas inlet connected to the hydrogen gas generation apparatus 10 via a check valve 11 and a flow path 12. Hydrogen gas dissolving means 13, hydrogen gas inlet pressure gauge 14 provided in the flow path 12, and hydrogen water removal valve (electromagnetic valve) 16 connected to the hydrogen water outlet of the hydrogen gas dissolving means 13 via the flow path 15. And a hydrogen water outlet pressure gauge 17 provided in the flow passage 15 and a flow passage 18 which is provided in the flow passage 18 which is the first tap water inflow passage from the water supply and controls the opening and closing of the flow passage 18 ( Solenoid valve 19, a pressure reducing valve 20 provided downstream of the tap water flow valve 19 in the flow path 18, a flow rate adjusting valve 21 provided downstream of the pressure reducing valve 20 in the flow path 18, The tap water inlet pressure gauge 22 provided in the channel 18 and the flow of the channel 18 A tap water filter F provided downstream of the adjustment valve 21 and a first stop pressure adjustment valve provided in the flow path 23 which is a second tap water inflow path from the water supply and controls the opening and closing of the flow path 23. (Electromagnetic valve) 24, a first constant flow valve 25 provided downstream of the first stop pressure regulating valve 24 in the flow path 23, and a flow path 18 downstream of the first constant flow valve 25. The second constant flow valve 27 provided in the downstream flow path 26 of the tap water filter F and the flow path 26 provided downstream of the second constant flow valve 27 of the flow path 26 are controlled to open and close. A second stop pressure adjusting valve (solenoid valve) 28, a dissolved oxygen removing means 34 provided in a flow path 26 connected to the outlet of the tap water filter F and the tap water inlet of the hydrogen gas dissolving means 13; The suction pump 35 connected to the oxygen removing means 34 and the flow path 2 downstream of the dissolved oxygen removing means 34 Water temperature detecting means 29, hydrogen gas generator 10, hydrogen water take-off valve 16, water temperature detecting means 29, tap water flow valve 19, first stop pressure adjusting valve 24, and second stop pressure adjusting valve And a control circuit 30 (corresponding to the control means of the present invention) electrically connected to 28. The control circuit 30 is also electrically connected to the tap water inlet pressure gauge 22, the hydrogen water outlet pressure gauge 17, and the hydrogen gas inlet pressure gauge 14.

  The configuration of the hydrogen gas generator 10, the hydrogen gas dissolving means 13, the hydrogen water take-off valve 16, the tap water flow valve 19, the water temperature detecting means 29, the water pressure adjusting means, and the control circuit 30 in the present embodiment is the first implementation. Since it is the same as that of the case of form, description is abbreviate | omitted.

  The dissolved oxygen removing means 34 removes (degass) at least a part of the dissolved oxygen in the supplied tap water with the gas separation hollow fiber membrane. In this embodiment, a hollow fiber gas separation membrane (M60-6000GE) manufactured by Nagayanagi Industry Co., Ltd. is used as the gas separation hollow fiber membrane. The tap water from which at least a part of the dissolved oxygen has been removed by the dissolved oxygen removing means 34 is supplied to the hydrogen gas dissolving means 13.

  The suction pump 35 is connected to the dissolved oxygen removing means 34 and depressurizes the outside of the gas separation hollow fiber membrane. When the outside of the gas separation hollow fiber membrane is depressurized by the suction pump 35, the gas (dissolved oxygen) moves to the decompression side through the wall surface of the hollow fiber, and the dissolved gas in the tap water decreases. Thereby, the dissolved hydrogen concentration of the hydrogen water to be taken out can be kept high.

  In the tap water, dissolved oxygen at the time of release to the atmosphere is dissolved, and a dissolved hydrogen concentration of 1.6 mg / L, which is a saturated concentration at atmospheric pressure at the hydrogen water take-off valve 16 in the system of the hydrogen water supply device 300 at all times. Even if it is in a dissolved state, it will be released to atmospheric pressure if released outside the system, and the equilibrium between dissolved hydrogen concentration and dissolved oxygen concentration according to Henry's law will be maintained. Will not maintain a dissolved hydrogen concentration of 1.6 mg / L or more. Therefore, by removing dissolved oxygen as much as possible using the dissolved oxygen removing means 34, the dissolved hydrogen concentration after release to the atmosphere can be kept high. Other operations and effects in the third embodiment are the same as in the case of the first embodiment, and a description thereof will be omitted.

  As the gas pressure control, the operation of the electrolyzer that is the hydrogen gas generator 10 is not controlled, but the gas pressure is adjusted using the gas pressure adjusting valve 32 and the third constant flow valve 33 as in the second embodiment. You may control. In that case, as the hydrogen gas generator 10, an apparatus that generates hydrogen gas stored in a high-pressure gas container such as a hydrogen gas cylinder may be used instead of the electrolysis apparatus.

  FIG. 8 schematically shows the configuration of a hydrogen water supply apparatus 400 according to the fourth embodiment of the present invention. The hydrogen water supply apparatus 400 of the present embodiment is also directly connected to the water supply, and produces hydrogen water by dissolving hydrogen gas in the tap water supplied from the water supply, and is used in a hydrogen water vending machine. be able to.

  As shown in the figure, a hydrogen water supply device 400 includes a hydrogen gas generation device 10 composed of an electrolysis device, and a gas inlet connected to the hydrogen gas generation device 10 via a check valve 11 and a flow path 12. Hydrogen gas dissolving means 13, hydrogen gas inlet pressure gauge 14 provided in the flow path 12, and hydrogen water removal valve (electromagnetic valve) 16 connected to the hydrogen water outlet of the hydrogen gas dissolving means 13 via the flow path 15. And a hydrogen water outlet pressure gauge 17 provided in the flow passage 15 and a flow passage 18 which is provided in the flow passage 18 which is the first tap water inflow passage from the water supply and controls the opening and closing of the flow passage 18 ( Solenoid valve 19, a pressure reducing valve 20 provided downstream of the tap water flow valve 19 in the flow path 18, a flow rate adjusting valve 21 provided downstream of the pressure reducing valve 20 in the flow path 18, The tap water inlet pressure gauge 22 provided in the channel 18 and the flow of the channel 18 A tap water filter F provided downstream of the adjustment valve 21 and a first stop pressure adjustment valve provided in the flow path 23 which is a second tap water inflow path from the water supply and controls the opening and closing of the flow path 23. (Electromagnetic valve) 24, a first constant flow valve 25 provided downstream of the first stop pressure regulating valve 24 in the flow path 23, and a flow path 18 downstream of the first constant flow valve 25. The second constant flow valve 27 provided in the downstream flow path 26 of the tap water filter F and the flow path 26 provided downstream of the second constant flow valve 27 of the flow path 26 are controlled to open and close. A second stop pressure adjusting valve (solenoid valve) 28, a dissolved oxygen removing means 34 provided in a flow path 26 connected to the outlet of the tap water filter F and the tap water inlet of the hydrogen gas dissolving means 13; The suction pump 35 connected to the oxygen removing means 34 and the flow path 2 downstream of the dissolved oxygen removing means 34 , A water temperature detecting means 29 provided in the flow path 26 downstream of the cooling means 36, the hydrogen gas generator 10, the hydrogen water removal valve 16, the water temperature detecting means 29, the cooling means 36, and tap water A control circuit 30 (corresponding to the control means of the present invention) electrically connected to the water flow valve 19, the first stop pressure adjusting valve 24, and the second stop pressure adjusting valve 28 is provided. The control circuit 30 is also electrically connected to the tap water inlet pressure gauge 22, the hydrogen water outlet pressure gauge 17, and the hydrogen gas inlet pressure gauge 14.

  In the present embodiment, the hydrogen gas generator 10, the hydrogen gas dissolving means 13, the hydrogen water take-off valve 16, the tap water flow valve 19, the dissolved oxygen removing means 34, the suction pump 35, the water temperature detecting means 29, the water pressure adjusting means and the control. Since the configuration of the circuit 30 is the same as that of the third embodiment, description thereof is omitted.

  The cooling means 36 is for cooling the tap water to a predetermined temperature. This cooling means 36 is preferably installed between the dissolved oxygen removing means 34 and the hydrogen gas dissolving means 13. The reason is that, generally, the amount of gas dissolved in water is lower when the water temperature is higher. Therefore, deoxygenation by the dissolved oxygen removing means 34 causes gas saturation even when the water temperature is higher from the membrane swelling state. This is because it is desirable also from the concentration.

  In this embodiment, since the tap water is cooled and maintained at a predetermined temperature by the cooling means 36, gas pressure control based on the water temperature as in the first to third embodiments is unnecessary. In the present embodiment, the signal detected by the water temperature detecting means 29 is used for control for constantly maintaining the water temperature at a predetermined temperature by the cooling means 36.

  As described above, according to the present embodiment, the temperature of tap water flowing into the hydrogen gas dissolving means 13 can be kept constant by providing the cooling means 36. Thereby, it is not necessary to adjust the gas permeation amount of the gas separation hollow fiber membrane by controlling the gas pressure according to the water temperature, and further, the control by the water pressure adjusting means can be fixed. Therefore, hydrogen water having a high dissolved hydrogen concentration can always be supplied, and cold hydrogen water for beverages can be provided. Other operations and effects in the present embodiment are the same as those in the first to third embodiments, and a description thereof will be omitted.

  As the hydrogen gas generator 10, an apparatus that generates hydrogen gas stored in a high-pressure gas container such as a hydrogen gas cylinder may be used instead of the electrolysis apparatus. However, it is necessary to depressurize the hydrogen gas from the high pressure gas container using a pressure reducing valve or the like.

  Examples of the hydrogen water supply device of the present invention will be described below.

  First, the balance between the hydrogen gas pressure and the water pressure when the tap water flow valve 19, the hydrogen water discharge valve 16, the first stop pressure adjusting valve 24, and the second stop pressure adjusting valve 28 were closed was examined. As the hydrogen water supply device, the hydrogen water supply device 100 in the first embodiment was used. In order to measure the dissolved hydrogen concentration, a dissolved hydrogen meter was installed on the downstream side of the hydrogen water take-off valve 16. The hydrogen gas generator 10 uses a GS Yuasa HG-105 electrolyzer manufactured by GS Yuasa Co., Ltd., and the gas separation hollow fiber membrane of the hydrogen gas dissolving means 13 is a hollow fiber gas separation membrane (M60-6000GE manufactured by Nagayanagi Industry Co., Ltd.). ), And the dissolved hydrogen meter used was BIH-50D manufactured by Bionics Instruments Co., Ltd.

  Test method: In the hydrogen gas dissolving means 13, the hydrogen gas pressure is set to 0.16 MPa, the cutoff pressure on the water side is changed, all the on-off valves related to the hydrogen gas dissolving means 13 are closed, and The transition to equilibrium was tested. The water temperature was 24 ° C.

Test results are shown in Tables 1-3.

  In the case of [Water pressure = Hydrogen gas pressure] in Table 1, the equilibrium was always maintained if there was no leakage. Further, in the case of [Water pressure <Hydrogen gas pressure] in Table 2, the gas separation hollow fiber membrane is a gas permeable membrane, the gas is transferred to the water side at an early stage, and 1/4 of the differential pressure is reduced by the hydrogen gas pressure. As a result, 3/4 increased to the water pressure, and the equilibrium was reached. In the case of [Water pressure> Hydrogen gas pressure] in Table 3, it is a slight pressure of 0.003 MPa at a very slow speed due to the gas permeation pressure acting and the small amount of gas in water. Underwater gas moved from the water side to the hydrogen gas side. Therefore, in order to suppress unnecessary consumption of hydrogen gas, it has been confirmed that it is required to satisfy the condition of [water pressure ≧ hydrogen gas pressure] in the hydrogen water sampling air state. [Hydrogen gas pressure] is necessary in order to always supply hydrogen water having a predetermined concentration or higher even if an arbitrary amount of hydrogen water is taken out at an arbitrary time.

[Example 1]
Using the hydrogen water supply device 300 in the third embodiment of the present invention, the difference in dissolved hydrogen concentration due to temperature was examined. In order to measure the dissolved hydrogen concentration, a dissolved hydrogen meter was installed on the downstream side of the hydrogen water take-off valve 16. The hydrogen gas generator 10 uses a GS Yuasa HG-105 electrolyzer manufactured by GS Yuasa Co., Ltd., and the gas separation hollow fiber membrane of the hydrogen gas dissolving means 13 is a hollow fiber gas separation membrane (M60-6000GE manufactured by Nagayanagi Industry Co., Ltd.). ), The degassing membrane of the dissolved oxygen removing means 34 is a hollow fiber gas separation membrane (M60-6000GE) manufactured by Nagayanagi Industry Co., Ltd., and the suction pump 35 is an APN-30GD2-W manufactured by Iwaki Co., Ltd. Used for 10 seconds on / 50 seconds off, the dissolved hydrogen meter used was BIH-50D manufactured by Bionics Instruments Co., Ltd.

Table 4 shows the test conditions.

The test results are shown in Table 5 and FIG.

  As shown in Table 5 and FIG. 9, in order to obtain hydrogen water having a dissolved hydrogen concentration of 1.6 mg / L, hydrogen gas of 0.18 MPa at 13 ° C., 0.15 MPa at 25 ° C., and 0.135 MPa at 33 ° C. Pressure was needed. It can be seen that, on average, adjustment of 0.00225 MPa per 1 ° C. is necessary, and it is necessary to increase the pressure by 0.011 MPa due to a 5 ° C. decrease in water temperature.

[Example 2]
The presence or absence of the dissolved oxygen removal means 34 was examined using the hydrogen water supply apparatus 100 in the first embodiment of the present invention and the hydrogen water supply apparatus 300 in the third embodiment. In order to measure the dissolved hydrogen concentration, a dissolved hydrogen meter was installed on the downstream side of the hydrogen water take-off valve 16. The hydrogen gas generator 10 uses a GS Yuasa HG-105 electrolyzer manufactured by GS Yuasa Co., Ltd., and the gas separation hollow fiber membrane of the hydrogen gas dissolving means 13 is a hollow fiber gas separation membrane (M60-6000GE manufactured by Nagayanagi Industry Co., Ltd.). ), The degassing membrane of the dissolved oxygen removing means 34 is a hollow fiber gas separation membrane (M60-6000GE) manufactured by Nagayanagi Industry Co., Ltd., and the suction pump 35 is an APN-30GD2-W manufactured by Iwaki Co., Ltd. Used for 10 seconds on / 50 seconds off, the dissolved hydrogen meter used was BIH-50D manufactured by Bionics Instruments Co., Ltd.

Table 6 shows the test conditions.

The test results are shown in Table 7 and FIG.

  As shown in Table 7 and FIG. 10, the dissolved oxygen removing means 34 removes dissolved oxygen (oxygen gas) and dissolved nitrogen (nitrogen gas) in tap water, so that the hydrogen gas is dissolved at a low pressure of 0.025 MPa. Concentrated hydrogen water could be obtained. Further, the hydrogen gas having a low pressure is a preferable situation because the water pressure in the closed state of the hydrogen water take-off valve 16 can be lowered.

[Example 3]
Using the hydrogen water supply apparatus 400 according to the fourth embodiment of the present invention, intermittent hydrogen water collection by adopting or rejecting hydrogen gas pressure control corresponding to a change in water temperature was examined. In order to measure the dissolved hydrogen concentration, a dissolved hydrogen meter was installed on the downstream side of the hydrogen water take-off valve 16.

Table 8 shows the test conditions.

  Tables 9, 10 and 11 and FIG. 12 and FIG. 12 show the test results of 40 seconds of hydrogen water sampling-140 seconds of no hydrogen water sampling and 1 L sampling procedure. Table 9 and FIG. 11 show the case where the hydrogen gas pressure is controlled by the temperature. Table 10 and FIG. 12 show a case where the temperature deviates from the hydrogen gas pressure control value depending on the temperature.

  When hydrogen gas pressure is controlled according to the water temperature, if adjusted, hydrogen water with a dissolved hydrogen concentration of 1.6 mg / L will always be supplied regardless of the standby / stop time when collecting 1 L of hydrogen water. I was able to. In this embodiment, since the temperature of the tap water is adjusted using the cooling water tank, the high-dissolved dissolved hydrogen in the hydrogen gas dissolving means 13 in the standby state flows out in the initial stage when the operation is started after the suspension, and the cooling water tank portion Then, the supercooled water waiting in (1) became low-dissolved dissolved hydrogen and eluted, and thereafter stable hydrogen water having a desired dissolved hydrogen concentration of 1.6 mg / L or more could be obtained. Since the lack of dissolved hydrogen concentration in the supercooled water was supplemented by the initial excessive dissolved hydrogen concentration, there was no doubt that the dissolved hydrogen concentration in the entire 1 L volume was 1.6 mg / L or more.

  On the other hand, if the hydrogen gas pressure is out of the range of the upper limit pressure value and the lower limit pressure value of the water temperature (exceeding the upper limit pressure value), a large amount of hydrogen gas moves to the water side even during stoppage, The gas body was detected, and hydrogen gas was lost during standby, resulting in increased costs. When the hydrogen gas pressure was lower than the lower limit pressure value, the desired dissolved hydrogen concentration of 1.6 mg / L could not be obtained, and the product deviated from the product specification of hydrogen water.

  Therefore, the control means 30 controls the hydrogen gas pressure based on the temperature T of the water detected by the water temperature detection means 29, as well as the hydrogen gas pressure P3, the tap water flow valve 19, and the hydrogen water take-off valve 16. By controlling the water pressure adjusting means so that the water pressure when the first stop pressure adjusting valve 24 and the second stop pressure adjusting valve 28 are closed and the system is closed is adjusted to substantially the same pressure, Even if an arbitrary amount of hydrogen water is taken out at an arbitrary time point, hydrogen water at a predetermined concentration or higher (for example, 1.6 mg / L or higher) can always be supplied.

  In the hydrogen water supply devices 100, 200, 300, and 400 of the above-described embodiments, the silicon-based hollow fiber gas separation membrane is used as the hydrogen gas dissolving means 13, but the present invention is not limited to this. is not. For example, a hydrogen gas dissolving device made of another kind of gas separation membrane material may be used.

  Furthermore, although tap water was used in the hydrogen water supply devices 100, 200, 300, and 400 of the above-described embodiments, the present invention is not limited to this. Water other than tap water may be used.

  All the embodiments described above are illustrative of the present invention and are not intended to be limiting, and the present invention can be implemented in other various modifications and changes. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

  The hydrogen water supply apparatus of the present invention can be used as a hydrogen water supply apparatus (hydrogen water server) for drinking water directly connected to the water supply system, and at any time a hydrogen water take-out type.

DESCRIPTION OF SYMBOLS 10 Hydrogen gas generator 11 Check valve 12, 15, 18, 23, 26 Flow path 13 Hydrogen gas melt | dissolution means 14 Hydrogen gas inlet pressure gauge 16 Hydrogen water outlet valve 17 Hydrogen water outlet pressure gauge 19 Tap water flow valve 20 Pressure reduction Valve 21 Flow adjustment valve 22 Tap water inlet pressure gauge 24 First stop pressure adjustment valve 25 First constant flow valve 27 Second constant flow valve 28 Second stop pressure adjustment valve 29 Water temperature detection means 30 Control circuit 31 Hydrogen Gas storage tank 32 Gas pressure regulating valve 33 Third constant flow valve 34 Dissolved oxygen removing means 35 Suction pump 36 Cooling means 100, 200, 300, 400 Hydrogen water supply device F Tap water filter

Claims (9)

It is a hydrogen water supply device that is directly connected to the water supply and through which the tap water is passed in a temporary manner,
Hydrogen gas dissolution configured to generate hydrogen water by supplying the tap water and hydrogen gas and dissolving the supplied hydrogen gas in the supplied tap water through a gas separation hollow fiber membrane Means for detecting the temperature of the supplied tap water provided in the water inflow path of the hydrogen gas dissolving means, and supplying the hydrogen gas to the hydrogen gas dissolving means and supplying the hydrogen gas Hydrogen gas supply means capable of variably adjusting the gas pressure, tap water flow valve capable of opening and closing the tap water inflow passage from the water supply, and hydrogen water capable of opening and closing the hydrogen water outflow passage of the hydrogen gas dissolving means A take-off valve, a water pressure adjusting means configured to adjust a water pressure of the tap water supplied to the hydrogen gas dissolving means, and the hydrogen gas supply means according to the water temperature detected by the water temperature detecting means Controlled, and a configured control means to adjust the gas pressure of the hydrogen gas supplied,
The water pressure adjusting means includes a gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means and the tap water passage water so that the concentration of hydrogen water taken out from the hydrogen water take-off valve is maintained at a predetermined concentration or more. A hydrogen water supply device configured to control the water pressure of the tap water supplied to the hydrogen gas dissolving means when the valve and the hydrogen water take-off valve are closed to substantially the same pressure. .   The hydrogen gas supply means includes a hydrogen gas generator that generates the hydrogen gas by electrolysis, and the control means includes a water temperature at which the gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means is detected. The hydrogen water supply device according to claim 1, wherein the electrolysis of the hydrogen gas generator is controlled so as to be within a range defined by.   A hydrogen gas generator for generating the hydrogen gas by electrolysis by the hydrogen gas supply means; a hydrogen gas storage tank for maintaining a gas pressure of the generated hydrogen gas at a constant pressure; and a hydrogen gas from the hydrogen gas storage tank Gas pressure adjusting means for controlling the gas pressure of the hydrogen gas, and the control means falls within a range in which the gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means is defined by the detected water temperature. The hydrogen water supply device according to claim 1, wherein the gas pressure adjusting means is controlled as described above.   The hydrogen gas supply means includes a hydrogen gas cylinder and a gas pressure adjusting means for controlling the gas pressure of the hydrogen gas from the hydrogen gas cylinder, and the control means supplies the hydrogen gas supplied to the hydrogen gas dissolving means. The hydrogen water supply apparatus according to claim 1, wherein the gas pressure adjusting means is controlled so that the gas pressure falls within a range defined by the detected water temperature.   The water pressure adjusting means is a first stop pressure adjusting valve provided in a tap water inflow passage from the water supply and / or a second stop provided in a drainage passage from the tap water inflow passage of the hydrogen gas dissolving means. A pressure adjusting valve, and adjusting the first stop pressure adjusting valve or the second stop pressure adjusting valve to adjust the gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means; When the water flow valve and the hydrogen water take-off valve are closed, the tap water supplied to the hydrogen gas dissolving means is controlled so as to have substantially the same pressure. The hydrogen water supply device according to any one of claims 1 to 4.   The control means is supplied to the hydrogen gas dissolving means when the gas pressure of the hydrogen gas supplied to the hydrogen gas dissolving means and the tap water flow valve and the hydrogen water take-off valve are closed. 6. The first stop pressure adjusting valve and / or the second stop pressure adjusting valve is controlled so that the water pressure of tap water becomes substantially the same pressure. The hydrogen water supply apparatus as described.   The apparatus further includes a dissolved oxygen removing unit that removes at least a part of the dissolved oxygen of the tap water, and the tap water from which the dissolved oxygen has been removed by the dissolved oxygen removing unit is supplied to the hydrogen gas dissolving unit. The hydrogen water supply device according to any one of claims 1 to 6, wherein the hydrogen water supply device is provided.   A cooling means for cooling the tap water to a predetermined temperature is further provided, and the tap water cooled by the cooling means is configured to be supplied to the hydrogen gas dissolving means. The hydrogen water supply device according to any one of 1 to 7.   The control means is configured to control the cooling means according to the detected water temperature so that the temperature of the tap water supplied to the hydrogen gas dissolving means is maintained at the predetermined temperature. The hydrogen water supply device according to claim 8.

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