JP2016039139A - Temperature and humidity regulating apparatus, humidity regulating apparatus, aptitude diagnosis device, temperature and humidity regulating method, aptitude diagnosis method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a device and method for regulating temperature and humidity, capable of precisely regulating temperature and humidity of gas; a device and method for diagnosis of aptitude; and a program.SOLUTION: A temperature and humidity regulating apparatus 1 for regulating temperature and humidity of gas includes: a humidification passage 31 through which gas passes and in which an amount of moisture vapor taken in from therearound increases and decreases in accordance with temperature; a moisture vapor imparting part 33 imparting moisture vapor around the humidification passage for humidification; an electric heater 35 that is in contact with the humidification passage and heats the humidification passage; and a temperature control part 21 for controlling the electric heater 35.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a temperature / humidity adjustment device, a humidity adjustment device, an aptitude diagnosis device, a temperature / humidity adjustment method, an aptitude diagnosis method, and a program, and more particularly to a temperature / humidity adjustment device that adjusts the temperature and humidity of a gas.

  When impurities such as carbon monoxide are mixed in hydrogen fuel used in a fuel cell vehicle, it has been confirmed that the cell performance deterioration of the fuel cell vehicle is affected. For this reason, a hydrogen fuel suitability diagnostic apparatus has been developed for the purpose of reducing the quality control of hydrogen fuel at the hydrogen station and improving the reliability of hydrogen production facilities.

  FIG. 17 is a diagram showing an outline of the diagnosis unit 201 of the hydrogen fuel suitability diagnosis apparatus. With reference to FIG. 17A, the diagnosis unit 201 includes a thermostatic chamber 203, a power source 205, and a voltmeter 207. In the thermostatic chamber 203, there is an electrolyte membrane 213 between the anode 209 and the cathode 211. The power source 205 passes a current between the anode 209 and the cathode 211, and the voltmeter 207 measures the voltage between the anode 209 and the cathode 211. Hydrogen fuel is introduced from the inflow port 215 and hydrogen fuel is flowed out from the outflow port 217.

  The diagnosis unit 201 causes the hydrogen decomposed on the anode 209 to be hydrogen ions by moving current from the power source 205 to the MEA (electrolyte membrane 213 / electrode assembly), and moves in the electrolyte membrane 213, and again on the cathode 211. Diagnose by applying the principle of the hydrogen pump that becomes hydrogen.

  When impurities are contained in the hydrogen fuel, as shown in FIG. 17 (b), the sensor electrode is poisoned and the voltage necessary for flowing a constant current increases. The diagnosis unit 201 detects the contamination of impurities based on this voltage change.

  Note that impurities such as carbon monoxide are required to be detectable over a wide range of 200 ppm to 0.2 ppm. FIG. 18 is a diagram showing an outline of a process from production to supply of hydrogen.

  Referring to FIG. 18, hydrogen production apparatus 301 produces hydrogen from a gas that is a raw material such as city gas, LPG, or LNG. Initially, impurities such as carbon monoxide are mixed at a high concentration of about 200 ppm. The impurity concentration decreases with time and eventually stabilizes at a low concentration of 0.2 ppm or less. Impurities having a high concentration of about 200 ppm to 0.2 ppm can be detected by a commercially available simple diagnostic device 303. The high purity hydrogen gas is compressed by the compressor 305 and stored in the gas accumulator 307. When the dispenser 309 supplies hydrogen fuel, a hydrogen fuel suitability diagnostic apparatus 311 that detects a very small impurity concentration of 0.2 ppm or less with high accuracy is required.

  In order for the impurity sensor used in the diagnostic unit 201 of such a hydrogen fuel suitability diagnostic apparatus 311 to function effectively, it is necessary to maintain the humidity and temperature of the hydrogen fuel to be diagnosed accurately at about ± 1%, respectively. is there.

  Conventionally, since relative humidity increases and decreases with slight temperature changes, it has been considered that accurate and reliable measurement is difficult. Therefore, when measuring the humidity in the flow path, indirect humidity measurement using a dew point has been performed, not a method of directly measuring relative humidity.

  Further, a general humidifier performs humidification control by controlling the ratio between a 100% humidification tank in which pure water is heated and a drying tank. However, humidification particles in the humidification tank are large and precise humidification control cannot be performed.

  On the other hand, when a specific resin utilizes the property of permeating water particles, the use of fine particles that permeate the membrane for humidification enables stable humidification control that is difficult to cause condensation. In this case, as a method for stably adjusting the temperature of the flow path in order to maintain the humidity of the flow path, hot water having a large heat capacity has been flowed around the flow path.

    However, in the case of humidity measurement using the dew point, even if the temperature in the flow path changes in a short time and the humidity in the flow path changes by several percent, the dew point itself is not changed unless the absolute amount of water vapor in the air changes. There is no change. For this reason, it has been difficult to quickly detect and precisely adjust a change in humidity.

  Moreover, since it is difficult to quickly adjust the temperature of the flow path with water having a large heat capacity, it is difficult to maintain the humidity in the flow path by controlling the amount of water vapor taken into the flow path quickly and precisely. .

  Therefore, an object of the present invention is to provide a temperature / humidity adjusting device and the like that can precisely adjust the temperature and humidity of a gas.

  A first aspect of the present invention is a temperature / humidity adjusting device that adjusts the temperature and humidity of a gas, and is a flow path through which the gas passes, and a humidified flow in which the amount of ambient water vapor is increased or decreased according to the temperature. Temperature and humidity, comprising a path, a water vapor applying unit that humidifies by supplying water vapor around the humidifying channel, an electric heater that contacts and heats the humidifying channel, and a temperature control unit that controls the electric heater It is an adjustment device.

  According to a second aspect of the present invention, there is provided the temperature / humidity adjusting device according to the first aspect, further comprising a measuring unit that measures a value of a relative humidity inside the flow path through the humidification flow path, and the temperature control unit includes: The electric heater is controlled based on the value of the relative humidity inside the flow path that has passed through the humidification flow path.

  A third aspect of the present invention is the temperature / humidity adjusting device according to the first or second aspect, wherein the drying flow rate adjusting unit adjusts the flow rate of the gas in the flow path that does not pass through the humidification flow path, and the drying A humidity control unit that controls the flow rate adjusting unit, and the flow path for allowing the gas to flow out of the dry flow rate adjusting unit is connected to a confluence point in the flow path for the gas to flow out of the humidifying flow path. .

  A fourth aspect of the present invention is the temperature / humidity adjusting apparatus according to the third aspect, wherein a gas supply unit that supplies the gas to the humidification channel, and between the gas supply unit and the humidification channel And / or a micro valve for controlling a flow rate of the gas flowing out of the humidification channel between the humidification channel and the junction.

  A fifth aspect of the present invention is the temperature / humidity adjusting apparatus according to the fourth aspect, further comprising a microchannel having a narrower channel than the humidification channel between the microvalve and the humidification channel. .

  A sixth aspect of the present invention is a humidity adjusting device that adjusts the humidity of a gas, and is a flow path through which the gas passes, and a humidifying flow path in which the amount of surrounding water vapor taken in is increased or decreased, A water vapor application unit that humidifies by supplying water vapor to the periphery of the humidification channel, a drying flow rate adjustment unit that adjusts the flow rate of the gas in a channel that does not pass through the humidification channel, and a humidity that controls the drying flow rate adjustment unit A flow for allowing the gas to flow out of the drying flow rate adjustment unit, comprising: a control unit; a gas supply unit for supplying the gas to the humidification channel; and a microvalve for controlling a flow rate of the gas flowing out of the humidification channel. The path is a humidity adjusting device connected to a junction point in a flow path through which the gas flows out from the microvalve.

  A seventh aspect of the present invention is an aptitude diagnosis device for diagnosing the suitability of hydrogen fuel as a fuel, a temperature / humidity adjusting unit for adjusting the temperature and humidity of the hydrogen fuel, and the temperature and humidity adjusting unit for adjusting the temperature and humidity. A measuring unit for measuring the relative humidity of the hydrogen fuel whose humidity is adjusted, a diagnostic unit for diagnosing the suitability of the hydrogen fuel as a fuel by diagnosing the hydrogen fuel, the temperature and humidity adjusting unit, and the measuring unit And a flow path for flowing the hydrogen fuel in the order of the diagnostic section, and the temperature and humidity adjustment section is a flow path through which the hydrogen fuel passes, and a humidified flow that increases or decreases the amount of ambient water vapor depending on the temperature A suitability diagnosis comprising a path, a water vapor applying unit that humidifies the water by supplying water vapor around the humidifying channel, an electric heater that contacts and heats the humidifying channel, and a temperature control unit that controls the electric heater Device.

  An eighth aspect of the present invention is the aptitude diagnosis device according to the seventh aspect, further comprising a calibration curve creation unit that creates a calibration curve of the concentration of impurities in the hydrogen fuel, and the calibration curve creation unit is known. And measuring a voltage when a first sample, which is a hydrogen fuel containing the first concentration of the impurity, is passed through the flow path, and containing a known second concentration of the impurity different from the first concentration. The voltage when the second sample, which is hydrogen fuel, is passed through the flow path is measured.

  A ninth aspect of the present invention is the aptitude diagnostic apparatus according to the eighth aspect, wherein the second concentration has a higher concentration of the impurity than the first concentration, and the calibration curve creation unit has a concentration-dependent flow rate. An adjustment unit is further provided, and the concentration-dependent flow rate adjustment unit makes the flow rate slower when measuring the impurity concentration of the second sample than when measuring the impurity concentration of the first sample.

  A tenth aspect of the present invention is a temperature / humidity adjustment method for adjusting the temperature and humidity of a gas, wherein the temperature control unit is a flow path through which the gas passes and an amount of ambient water vapor taken in according to the temperature. It is a temperature and humidity adjustment method including the step of heating the humidification flow path by controlling an electric heater based on the value of the relative humidity inside the flow path through the humidification flow path that increases or decreases.

  An eleventh aspect of the present invention is an aptitude diagnosis method using an aptitude diagnosis device for diagnosing the suitability of hydrogen fuel as a fuel. The aptitude diagnosis device is a flow path through which the hydrogen fuel passes and has a temperature. The humidity and flow rate in which the amount of water vapor taken in is increased or decreased according to the temperature, the electric heater for heating the humidified flow channel, the temperature controller for controlling the electric heater, and the temperature and humidity are adjusted in the humidified flow channel. In addition, a measurement unit for measuring the relative humidity of the hydrogen fuel, a diagnosis unit for diagnosing the suitability of the hydrogen fuel as a fuel by diagnosing the hydrogen fuel, the humidification channel, the measurement unit, and the diagnosis unit in this order A flow path for flowing the hydrogen fuel, and the temperature control section includes a step of heating the humidification flow path by controlling the electric heater based on a measurement result of relative humidity measured by the measurement section. It is an aptitude diagnosis method

  A twelfth aspect of the present invention is the aptitude diagnosis method according to the eleventh aspect, wherein the aptitude diagnosis device includes a calibration curve creation unit that creates a calibration curve of the concentration of impurities in the hydrogen fuel, and a known concentration. A first diagnostic step in which the diagnostic unit diagnoses after the calibration curve creation unit has caused the gas from the mixed gas holding unit to flow through the flow channel for a first time. The calibration curve creation unit further includes a second diagnosis step in which the diagnosis unit diagnoses after flowing the gas from the mixed gas holding unit through the flow path for a second time different from the first time.

  A thirteenth aspect of the present invention is a program that causes a computer to function as a temperature control unit in the temperature and humidity adjustment method according to the tenth aspect.

  According to each aspect of the present invention, the amount of water vapor taken in by the humidifying channel can be quickly adjusted by using an electric heater that is heated in contact with the humidifying channel. Therefore, it becomes possible to precisely adjust the temperature and humidity of the gas.

  Further, according to the second aspect of the present invention, by performing feedback control of the humidification channel based on the measurement result of the relative humidity value sensitive to the temperature, the gas temperature and the precise temperature in the humidification channel can be adjusted. It becomes easy to provide a temperature / humidity adjusting device or the like for adjusting the humidity.

  Furthermore, according to the 3rd viewpoint of this invention, it becomes easy to adjust the humidity of gas precisely by mixing the gas which passed through the humidification flow path, and the dried gas.

  Furthermore, according to the 4th and 6th viewpoints of this invention, the humidification by a humidification flow path is stabilized by installing the microvalve which enables the flow volume to be adjusted precisely before and after the humidification flow path. Can be done. As a result, it is possible to stably humidify the gas.

  Furthermore, according to the fifth aspect of the present invention, by providing a micro flow channel between the micro valve and the humidification flow channel, it is possible to perform control with higher accuracy. Specifically, the humidity of the hydrogen fuel can be adjusted with high accuracy of about ± 0.2% and the temperature of about ± 0.1%.

  Furthermore, according to the seventh aspect of the present invention, by directly measuring the relative humidity in the flow path, a change in the humidity in the flow path can be detected quickly to perform suitability diagnosis of hydrogen fuel. Can do.

  Furthermore, according to the eighth aspect of the present invention, it is possible to measure the impurity concentration in the hydrogen fuel to be measured. Therefore, it becomes possible to quantitatively diagnose the suitability of hydrogen fuel as a fuel.

  Furthermore, according to the ninth and twelfth aspects of the present invention, it is easy to create a calibration curve and perform concentration measurement without changing the measurement range of the measurement unit.

It is a block diagram which shows the outline | summary of the temperature / humidity adjustment apparatus 1 which concerns on Example 1 of this invention. It is a figure which shows the outline | summary of the hydrogen fuel diagnostic apparatus 41 using the temperature / humidity adjustment apparatus. 7 is a diagram illustrating an example of an operation screen of the display unit 25. FIG. It is a figure which shows an example of the control screen and setting screen of the display part. It is a figure which shows an example of the adjustment result of the temperature and humidity using the temperature / humidity adjustment apparatus. It is a figure which shows another example of the adjustment result of the temperature and humidity using the temperature / humidity adjustment apparatus. It is a figure which shows an example of the detection result of a voltage. It is a block diagram which shows the outline | summary of the temperature / humidity adjustment apparatus 101 which concerns on Example 2 of this invention. It is a figure which shows an example of the hydrogen fuel suitability diagnosis result at the time of using the temperature / humidity adjustment apparatus. It is a figure which shows an example of the adjustment result of temperature and humidity using the temperature / humidity adjustment apparatus. It is the figure which expanded a part of FIG. It is a figure which shows the outline | summary of the impurity concentration measurement part which measures impurity concentration. It is a figure which shows the outline | summary of the whole aptitude diagnosis apparatus containing an impurity concentration measurement part and a temperature / humidity adjustment apparatus. It is a figure which shows the flow which measures the hydrogen gas which the impurity of the 1st density | concentration known as about 2 ppm of impurity concentration mixed in for preparing a calibration curve. It is a figure which shows the flow which measures the hydrogen gas in which the impurity of the 1st density | concentration known as an impurity density | concentration about 200 ppm was mixed for preparation of a calibration curve. It is a figure which shows the flow of impurity concentration measurement of hydrogen fuel. It is a figure which shows the outline | summary of the diagnostic principle of the conventional hydrogen fuel. It is a figure which shows the outline | summary of the process from manufacture of hydrogen to supply.

  Embodiments of the present invention will be described below with reference to the drawings. The embodiment of the present invention is not limited to the following examples.

  FIG. 1 is a block diagram showing an outline of a temperature / humidity adjusting apparatus 1 according to Embodiment 1 of the present invention. Hereinafter, an outline of the temperature / humidity adjusting apparatus 1 in FIG. 1 will be described.

  The temperature / humidity adjusting device 1 (an example of “temperature / humidity adjusting device” in the claims of the present application) adjusts the temperature and humidity of a gas. The temperature / humidity adjusting apparatus 1 includes an inflow valve 3, a total flow rate adjusting unit 5, a branch 7, a humidifier 9, a dry flow rate adjusting unit 11 (an example of a “dry flow rate adjusting unit” in the claims), Point 13, microchannel 17, microvalve 19, temperature control unit 21 (an example of “temperature control unit” in the claims of the present application), humidity control unit 23, display unit 25, setting unit 27, And a measuring unit 29 (an example of “measuring unit” in the claims). The humidifier 9 includes a humidifying channel 31 (an example of a “humidifying channel” in the claims of the present application), a water vapor applying unit 33 (an example of a “water vapor applying unit” in the claims of the present application), and an electric heater 35 (this application). An example of “electric heater” in the claims. The measurement unit 29 includes a relative humidity measurement unit 37 and a temperature control unit 39.

  The gas flowing into the temperature / humidity adjusting device 1 from the inflow valve 3 is sent to the humidifier 9 and the dry flow rate adjusting unit 11 at the branch 7 via the total flow rate adjusting unit 5. The gases sent from the humidifier 9 and the drying flow rate adjustment unit 11 merge at the junction 13 and flow into the measurement unit 29. The gas emitted from the humidifier 9 reaches the junction 13 through the microchannel 17 and the microvalve 19 in order.

  The total flow rate adjusting unit 5 adjusts the flow rate of the gas flowing in from the inflow valve 3. The humidifier 9 humidifies the gas passing through the humidification channel 31. The humidification channel 31 is humidified from the water vapor application unit 33 and heated from the electric heater 35. The microvalve 19 precisely adjusts the flow rate of the humidified gas coming out of the humidifier 9. The temperature control unit 21 controls the temperature of the electric heater 35 while obtaining information on the temperature of the humidifier 9. The humidity control unit 23 controls the humidity of the drying flow rate adjustment unit 11. The display unit 25 displays an operation screen, a setting screen, and the like in addition to displaying the state of the gas and the temperature / humidity adjusting device 1. The setting unit 27 is a user interface for allowing the user to set the temperature / humidity adjusting apparatus 1. The measuring unit 29 measures the humidity and temperature of the gas. The relative humidity measuring unit 37 measures the relative humidity of the gas that has flowed into the measuring unit 29. The temperature measurement unit 39 measures the temperature of the gas flowing into the measurement unit 29.

  In the humidifier 9, at least a part of the humidifying channel 31 is made of Nafion (registered trademark), and the amount of water vapor that permeates varies depending on the temperature. The water vapor application unit 33 humidifies the surroundings of the humidification channel 31, and the temperature control unit 21 controls the electric heater 35 to heat the humidification channel 31, thereby adjusting the humidity of the gas passing through the humidification channel 31. Is possible. In particular, the electric heater 35 spirally winds and contacts the humidifying channel 31 so that the amount of water vapor taken in by the humidifying channel can be quickly adjusted.

  On the other hand, the humidity of the gas passing through the drying flow rate adjusting unit 11 is controlled by the humidity control unit 23 controlling the drying flow rate adjusting unit 11. It is possible to adjust the humidity of the gas by mixing the humid gas that has passed through the humidifier 9 and the dry gas that has passed through the dry flow rate adjusting unit 11 at an appropriate ratio. Here, the gas discharged from the humidifier passes through the microvalve 19 so that precise adjustment is possible. Further, since the gas exiting the humidifier 9 passes through the micro flow path 17 having a small diameter immediately before the micro valve 19, further precise adjustment is facilitated.

  Also, the relative humidity of the gas is very sensitive to the temperature of the gas. Therefore, when the temperature control unit 21 controls the electric heater 35 based on the measurement result of the relative humidity measurement unit 37, quick humidity adjustment in the humidification channel is further facilitated.

  With reference to FIG. 2, the hydrogen fuel diagnostic apparatus using the temperature / humidity adjusting apparatus 1 will be described. FIG. 2 is a diagram showing an outline of the hydrogen fuel diagnostic device 41.

  A hydrogen fuel diagnostic device 41 shown in FIG. 2 includes the temperature / humidity adjusting device 1 of FIG. 1, and further includes a diagnostic unit 43, a control module 45, a detection module 47, a pure water tank 49, and a pure water drain valve 51. And further comprising. The measurement unit 29 includes a temperature / humidity sensor 53. The diagnosis unit 43 includes a diagnosis sensor 55 that is a sensor for diagnosing the suitability of hydrogen fuel as a fuel. The control module 45 includes a temperature control unit 21, a humidity control unit 23, and a measurement unit temperature control unit 57.

  The measurement unit 29 transmits the temperature of the measurement unit 29 measured by the temperature / humidity sensor 53 to the temperature control unit 21. The temperature control unit 21 controls the electric heater 35 based on the temperature of the measurement unit 29 transmitted as a measurement result. In addition, the measurement unit 29 transmits the relative humidity of the measurement unit 29 measured by the temperature / humidity sensor 53 to the humidity control unit 23. The humidity control unit 23 controls the humidity of the drying flow rate adjustment unit 11 based on the relative humidity of the measurement unit 29 transmitted as a measurement result. The control module 45 performs feedback control while obtaining information on the temperature and humidity of each part. The detection module 47 applies current to the diagnostic sensor 55 and measures the voltage at the diagnostic sensor 55 to detect impurities in the hydrogen fuel. The pure water tank 49 supplies pure water to the water vapor applying unit 33 via the pure water drain valve 51.

  For example, the total flow rate adjusting unit 5 adjusts the total flow rate of the hydrogen fuel flowing into the humidifier 9 and the dry flow rate adjusting unit 11 to 50 to 100 ml / min. The temperature control unit 21 controls the temperature of the electric heater 35 to 30 to 40 ° C. based on the temperature information of the humidifier 9 transmitted from the humidifier 9. Based on the temperature and / or humidity information of the measurement unit 29 transmitted from the temperature / humidity sensor 53, the humidity control unit 23 adjusts the drying flow rate adjustment unit 11 so that the humidity in the measurement unit 29 becomes 70.0% rh. Control the humidity. The measurement unit temperature control unit 57 controls the temperature of the measurement unit 29 to 40.0 ° C. based on the temperature and / or humidity information of the measurement unit 29 transmitted from the temperature / humidity sensor 53. As a whole, the temperature / humidity adjusting apparatus 1 supplies hydrogen fuel adjusted to a relative humidity of 70% rh and 40 ° C. to the diagnostic unit 43 at 50 to 100 ml / min. The temperature and humidity adjusting device 1 keeps the temperature and humidity of the hydrogen fuel to be diagnosed extremely stable, so that the hydrogen fuel diagnostic device 41 can perform an appropriate diagnosis.

  With reference to FIG. 3, the operation screen of the temperature / humidity adjusting apparatus 1 will be described. FIG. 3 is a diagram illustrating an example of an operation screen of the display unit 25.

  As shown in FIG. 3, the display unit 25 displays a plurality of buttons as an operation screen. For example, “monitor screen”, “humidification control screen”, “temperature chamber temperature control screen”, “apparatus status / operation”, “data display screen 1”, “data display screen 2”, “data display screen 3”, “ Data display screen 4 ”and“ setting ”buttons are displayed. The display unit 25 is a touch panel and can be operated by touching the screen.

  With reference to FIG. 4, other screens displayed on the display unit 25 of the temperature / humidity adjusting apparatus 1 will be described. FIG. 4 is a diagram illustrating an example of a control screen and a setting screen of the display unit 25, and is a diagram illustrating (a) a monitor screen, (b) a humidification control screen, (c) a thermostatic chamber screen, and (d) a setting screen. is there.

  In the “monitor screen” shown in FIG. 4A, the entire hydrogen fuel diagnostic device 41 is displayed, the flow rate of hydrogen fuel in the total flow rate adjusting unit 5, the relative humidity and temperature in the humidifier 9, and the temperature and humidity sensor 53. , The temperature of the thermostatic chamber of the diagnostic sensor 55, the detection result of impurities in the hydrogen fuel detected by the detection module 47, and the like are displayed. Although the CO change rate is displayed in mV in FIG. 4A, it can also be displayed in terms of the impurity concentration (ppm) mixed.

  In the “humidification control screen” shown in FIG. 4B, the flow rate of hydrogen fuel in the total flow rate adjustment unit 5, the flow rate of hydrogen fuel in the dry flow rate adjustment unit 11, the measurement result of the temperature and humidity sensor 53, and the like are displayed. The

  In the “constant temperature chamber screen” shown in FIG. 4C, the diagnostic unit 43 is enlarged and displayed, the measurement result of the temperature / humidity sensor 53, the flow rate of hydrogen fuel flowing in through the measurement unit 29, and the diagnostic unit 43 The temperature of the thermostat is displayed.

  In the “setting” screen shown in FIG. 4D, for example, the start or stop of measurement, the presence or absence of an abnormality in the operation state, the presence or absence of an abnormality in the sensor voltage, the presence or absence of an abnormality in the communication state, the voltage or current in the diagnosis unit 43 The change rate of the voltage, the measurement result of the temperature / humidity sensor 53, the flow rate of the hydrogen fuel at various locations in the hydrogen fuel diagnostic device 41, and the temperature of the humidification passage 31 are displayed. The user sets measurement start / stop, sensor dehumidification, and the like on this screen. The setting unit 27 causes the control module 45 and / or the detection module 47 to execute control based on the setting content in accordance with a user input.

  Hereinafter, the actual adjustment results using the temperature and humidity adjusting apparatus 1 will be described with reference to FIGS. FIG. 5 is a diagram showing an example of a change with time of the temperature of the gaseous fuel and a change with time of the humidity when the temperature and humidity adjustment apparatus according to the present invention is used.

  Conventional commercially available devices have a temperature accuracy of about ± 0.5 ° C. On the other hand, as shown in FIG. 5A, the temperature / humidity adjusting apparatus 1 sets the temperature of the measuring unit 29 to 39.97 to 40.07 ° C. with respect to the set temperature of 40 ° C. for one day. It could be maintained with an accuracy of 0.1 ° C. In other words, it was five times more accurate than conventional commercially available devices.

  Further, the conventional commercially available apparatus has a relative humidity accuracy of about ± 1% rh. On the other hand, as shown in FIG. 5B, the temperature / humidity adjusting apparatus 1 sets the relative humidity of the measuring unit 29 to 69.97 to 70 with respect to the set relative humidity of 70.00% rh for one day. It was possible to maintain the accuracy of 0.06% rh and ± 0.1% rh. In other words, it was 10 times more accurate than conventional commercially available devices. As described above, the temperature / humidity adjusting apparatus 1 according to the present invention can adjust the temperature and humidity with much higher accuracy than the conventional one.

  The main reason for the adjustment with high accuracy is that the temperature of the humidification channel 31 can be controlled with high accuracy. As shown in FIG.5 (c), with respect to the setting temperature of 35.0 degreeC, it was able to maintain with the precision of 34.91-35.08 degreeC and +/- 0.1 degreeC or more.

  Furthermore, the temperature / humidity adjusting apparatus 1 stably adjusted the humidity of the hydrogen fuel supplied over a long period of time. FIG. 6 is a diagram illustrating another example of the temperature and humidity adjustment results using the temperature and humidity adjustment apparatus according to the present invention. As shown in FIG. 6A, the temperature / humidity adjusting apparatus 1 was able to maintain the relative humidity of the measuring unit 29 at ± 0.1% rh for 27 days. As one of the causes, as shown in FIG. 6B, it can be mentioned that the temperature of the humidifying channel 31 could be maintained with an accuracy of ± 0.1 ° C. for 27 days.

  Furthermore, as a result of being able to supply temperature and humidity stably with high accuracy in this way, the hydrogen fuel diagnostic device 41 showed a stable output voltage and output change rate. FIG. 7 is a diagram illustrating an example of a voltage detection result, and is a diagram illustrating (a) a change with time of the average output voltage [mV] and (b) a change with time of the average output change rate [mV].

  As shown in FIG. 7A, the average output voltage was suppressed to a slight change with an increase of 2 mV / day. Further, as shown in FIG. 7B, the average output change rate was also within a range of about ± 0.5 mV for 27 days. As described above, the fluctuation of the output voltage and the output change rate accompanying the change in the temperature and humidity of the hydrogen fuel can be minimized, so that the hydrogen fuel diagnostic apparatus 41 can detect impurities such as carbon monoxide with high accuracy. Become.

  Subsequently, different configurations of the temperature and humidity adjusting apparatus 1 will be described. In Example 1, the microvalve 19 was installed between the humidifier 9 and the junction 13. In the second embodiment, a temperature / humidity adjusting device 101 in which a micro valve is installed between the branch 7 and the humidifier 9 will be described.

  With reference to FIG. 8, the structure of the temperature / humidity adjusting apparatus 101 will be described. FIG. 8 is a block diagram illustrating an outline of the temperature and humidity adjustment apparatus 101 according to the second embodiment of the present invention.

Unlike the temperature / humidity adjusting device 1, the temperature / humidity adjusting device 101 includes a microvalve 119 between the branch 107 and the humidifier 109. In addition to drying the flow rate adjusting unit 11, the first corresponding to the measuring unit 29 dry flow rate adjusting portion 111 ₁ and the first measuring unit 129 ₁ of Example 1, second drying flow rate adjusting unit 111 ₂ and the second measurement unit 129 further comprises a _2. Further, the control module 145 corresponding to the control module 45 of the first embodiment includes a temperature control unit 121 and a first humidity control unit corresponding to the temperature control unit 21, the humidity control unit 23, and the measurement unit temperature control unit 57 of the first embodiment. 123, in addition to the first measurement unit temperature control unit 157, a second measurement unit temperature control unit 159 and a second humidity control unit 161 are further provided.

The second measuring unit 129 ₂ is connected between the first measuring unit 129 ₁ and the diagnosis section 143. Second drying flow rate adjusting unit 111 ₂ is connected between branch 107 and the second measuring unit 129 _2. Further, the flow path gases from the first measuring portion ₁₂₉₁ flows out and the flow passage which the gas flows out from the second drying flow rate adjusting unit 111 _2, and merges at confluence 113 _2, second measuring unit 129 ₂ It is connected to the.

Here, by connecting the ₂ first measuring unit 129 ₁ and the second measuring unit 129 in order, it is possible to adjust with high precision the temperature and humidity than in Example 1. The temperature and humidity adjusted coarsely in a first measuring unit 129 _1, in order to more precisely control the second measuring unit 129 _2.

Specifically, the first measurement unit temperature controller 157, based on the first temperature and / or humidity of the information of the measuring part 129 ₁ which is transmitted from the temperature and humidity sensors, a first temperature measurement unit 129 ₁ 40 Control at 0 ° C. The first humidity control unit 123, based on the first measurement portion 129 ₁ of the temperature and / or humidity information, as the humidity in the first measuring unit 129 ₁ is 90.0% rh, first drying flow adjustment controlling the humidity of the parts 111 _1.

Second measuring part temperature control unit 159, based on the second temperature of the measuring part 129 ₂ and / or humidity of the information transmitted from the temperature and humidity sensor, controls the second temperature of the measuring part 129 ₂ to 40.0 ° C. To do. The second humidity control unit 161, based on the second temperature of the measuring part 129 ₂ and / or humidity information, as the humidity in the second measuring unit 129 ₂ is 80.0% rh, second drying flow adjustment controlling the humidity of the part 111 _2.

  As a whole, the temperature / humidity adjusting apparatus 101 supplies hydrogen fuel adjusted to a relative humidity of 80% rh and 40 ° C. to the diagnostic unit 143 at 50 to 100 ml / min.

  Subsequently, the hydrogen fuel suitability diagnosis result when the temperature and humidity adjusting apparatus 101 is used, and the adjustment result of the temperature and humidity of the hydrogen fuel will be described with reference to FIGS. FIG. 9A is a diagram illustrating an example of a hydrogen fuel suitability diagnosis result when the temperature / humidity adjusting apparatus 101 is used. FIG. 9B is an enlarged view of a part of the graph of the average change rate of the voltage indicated by a circle in FIG. 9A. FIG. 10A is a diagram illustrating an example of a temperature and humidity adjustment result using the temperature / humidity adjustment apparatus 101. FIG.10 (b) is the figure which expanded the control result of the average sensor humidity shown by Fig.10 (a). Fig.11 (a) is the figure which expanded the control result of the average humidifier temperature shown by Fig.10 (a). FIG.11 (b) is the figure which expanded the control result of the average sensor temperature shown by Fig.10 (a).

  With reference to FIG. 9, the measurement result of the diagnostic sensor of the diagnostic unit 143 will be described. In FIG. 9, the horizontal axis represents time and the vertical axis represents the output value.

  Exciting current AC20mA PP, humidity 80 ± 0.2% RH, temperature 40 ± 0.1 ℃, average voltage (mV / 10min) detected by diagnostic sensor, output change rate (mV / 10min) average current is very stable I understand that Under conditions without CO poisoning, the voltage rise value is 0.018 mV / 10 min, ie 2.6 mV / day. Even in half a year, the increase is only below 500mV, and it can be said that it is a good value as an indicator of the lifetime of the diagnostic sensor.

  9A and 9B, when 0.2 ppm of carbon monoxide was poisoned for 5 minutes, the diagnostic sensor had an output change rate of 3.7 mV / 10 min. As shown in FIG. 9B, it can be seen that the poisoning can be detected promptly and clearly from the CO poisoning indicated by the arrow.

Next, the temperature and humidity adjustment results of the temperature / humidity adjusting apparatus 101 over about two weeks will be described with reference to FIGS. The horizontal axis represents elapsed time. The vertical axis represents the average hydrogen flux (ml / min), average sensor humidity (% RH) and average sensor temperatures in the measurement unit 129 ₂ (° C.), the average temperature of the humidifier 109 (° C.), a second drying flow rate adjusting unit 111 It represents the average dry flow rate of the gas flowing from the ₂ to the measuring unit 129 ₂ (ml / min).

Referring to FIG. 10 (a), although the average drying flow rate varies, the average hydrogen flow rate, the average sensor humidity, the average sensor temperature, and the humidifier average temperature are kept constant with high accuracy. I can see it. Figure 10 Referring to (b), average sensor humidity in the measurement unit 129 _2, while also about 2 weeks, was kept within RH approximately 80% ± 0.2%. Referring to FIG. 11A, similarly, the average temperature of the humidifier 109 was kept within 34 ° C. ± 0.1 ° C. Furthermore, referring to FIG. 11 (b), the average sensor temperature was kept within 40 ° C. ± 0.1 ° C.

  The inventors of the present invention have confirmed that the life of the diagnostic sensor is extended when the diagnostic sensor is used at 80% RH as compared with the case where the diagnostic sensor is used at 70% RH. When the humidity of the hydrogen fuel to be diagnosed supplied to the diagnostic sensor was 70% RH, the voltage increase value was 0.15 mV / 10 min, that is, about 21.6 mV / day. The upper limit value of the voltage is, for example, about 500 mV, and the life of the diagnostic sensor is less than one month. On the other hand, in the case of 80% RH, as described above, 0.018 mV / 10 min was reduced to about 1/10, and a remarkable effect that the lifetime of the diagnostic sensor became half a year or more was confirmed. Therefore, it can be said that the temperature / humidity adjusting device according to the present invention can maintain temperature and humidity with high accuracy at a high humidity such as 80% RH.

  The diagnostic sensor 55 in FIG. 2 diagnoses the presence or absence of impurities. On the other hand, the impurity concentration measuring unit 173 provided in the aptitude diagnosis device 171 (an example of the “appropriate diagnosis device” in the claims) of the present embodiment can also measure the impurity concentration. This makes it possible to quantitatively diagnose the suitability of the hydrogen fuel to be diagnosed as a fuel. Hereinafter, the impurity concentration measurement unit 173 will be described in detail.

  With reference to FIGS. 12-16, the structure which measures the impurity concentration in the hydrogen fuel which flows into the temperature / humidity adjustment apparatus 1 is described. FIG. 12 is a diagram showing an outline of the impurity concentration measuring unit 173 that measures the impurity concentration. FIG. 13 is a diagram showing an outline of the entire aptitude diagnosis apparatus 171 including the impurity concentration measurement unit 173 and the temperature / humidity adjustment apparatus 1. FIG. 14 is a diagram showing a flow of measuring hydrogen gas mixed with an impurity having a first concentration known as an impurity concentration of about 2 ppm for preparing a calibration curve. FIG. 15 is a diagram showing a flow of measuring hydrogen gas mixed with an impurity having a first concentration known as an impurity concentration of about 200 ppm for preparing a calibration curve. FIG. 16 is a flowchart showing an outline of a method for measuring the impurity concentration of hydrogen fuel.

  Referring to FIG. 12, an impurity concentration measurement unit 173 includes a gas holding unit 175, a flow channel unit 177, a gas flow rate adjustment unit 179 (an example of a “concentration dependent flow rate adjustment unit” in the claims), an impurity concentration, A calculation unit 181, a calibration curve creation unit 183 (an example of a “calibration curve creation unit” in the claims of the present application), and a storage unit 185 are provided. The gas holding unit 175 includes a hydrogen fuel holding unit 187 that holds hydrogen fuel, a hydrogen holding unit 189 that holds high-purity gaseous hydrogen, and a first mixed gas holding unit 191 (“mixed gas holding unit” in the claims of this application). And a second mixed gas holding unit 193 (another example of the “mixed gas holding unit” in the claims of the present application). The first mixed gas holding unit 191 includes gaseous hydrogen (first mixed gas; “first sample” in the present application claim) containing impurities having a known first concentration (an example of the “first concentration” in the present application claim). Hold an example). The second mixed gas holding unit 193 includes gaseous hydrogen (second mixed gas; this application) containing impurities of a known second concentration (an example of “second concentration” in the claims of the present application) that is higher than the first concentration. An example of “second sample” in the claims is held. In the present embodiment, the first mixed gas holding unit 191 holds gaseous hydrogen mixed with 2 ppm of carbon monoxide. The second mixed gas holding unit 193 holds gaseous hydrogen mixed with 200 ppm of carbon monoxide.

The flow path part 177 is a first flow path 195 ₁ , a second flow path 195 ₂ ,..., An m-th flow path 195 _m (m) as a plurality of flow paths from the gas holding part 175 to the total flow rate adjustment part 5. Has a natural number of 2 or more. Moreover, the flow path part 177 is a 1st valve 197 ₁ , 2nd valve 197 ₂ ,..., N-th valve 197 _n (n is a natural number of 2 or more) as a valve for switching the passage of gas. Have Flow regulating unit 179, a first gas flow adjustment unit 199 ₁ for adjusting the flow rate of the gas from the first mixed gas holding portion 191, a second gas to adjust the flow rate of the gas from the second mixed gas holding portion 193 A flow rate adjusting unit ₁₉₉₂ . The first gas flow rate adjusting unit 199 ₁ and the second gas flow rate adjusting unit 199 ₂ can be set to different flow rates. In this embodiment, as an initial setting, a total flow adjuster 5 is set to 100ml / min, the first flow regulating unit 199 ₁ is set to 100ml / min, the second flow regulating unit 199 ₂ 1.0 ml Set to / min.

Referring to FIG. 13, the various holding units are connected to the total flow rate adjusting unit 5 of the temperature / humidity adjusting device 1 through a flow path unit 177. In Figure 13, the flow path unit 177, first valve 197 gas from various holding unit to the total flow rate adjuster 5 to open and close the first flow path 195 ₁ from the seventh flow path 195 ₇ to move, the channel ₁ from and a twelfth valve _{197 12.}

The hydrogen holding unit 189 is connected to the total flow rate adjusting unit 5 via the first valve 197 ₁ , the second valve 197 _2, and the third valve 197 ₃ in the order closer to the hydrogen holding unit 189 (first flow path 195 ₁ ). The hydrogen holding portion 189 is connected to the total flow adjuster 5 respectively by different second flow path 195, _second and third flow path 195 ₃ and the first flow path 195 _1. The second flow path 195 ₂ is connected to the first flow path 195 ₁ between the first valve 197 ₁ and a second valve 197 _2, even while the third valve 197 ₃ and the total flow rate adjusting section 5 second It is connected to the first flow path 195 _1. The second flow path 195 ₂ includes a fourth valve 197, _fourth and fifth valve 197 ₅ sequentially closer to the hydrogen holding portion 189. Third flow path 195 ₃ is connected to the first flow path 195 ₁ between the first valve 197 ₁ and a second valve 197 _2, even while the third valve 197 ₃ and the total flow rate adjusting section 5 second It is connected to the first flow path 195 _1. The third flow path 195 ₃ includes a sixth valve 197 _sixth and seventh valves 197 ₇ sequentially closer to the hydrogen holding portion 189.

The first mixed gas holding portion 191, the eighth valve 197 ₈ sequentially closer to the first mixed gas holding portion 191, the first flow regulating unit 199 ₁ via a fifth valve 197 ₅ of the second flow path 195 ₂ All It is connected to the flow rate adjusting unit 5 (fourth flow path 195 ₄ ). The hydrogen fuel holding unit 187 is connected to the total flow rate adjusting unit 5 via the ninth valve 197 ₉ , the tenth valve 197 ₁₀ , and the third valve 197 ₃ of the first flow path 195 ₁ in the order closer to the hydrogen fuel holding unit 187. (5th flow path 195 ₅ ). The second mixed gas holding unit 193 includes an eleventh valve 197 ₁₁ , a twelfth valve 197 ₁₂ , a second gas flow rate adjusting unit 199 ₂ , and a seventh valve of the third flow path 195 ₃ in the order closer to the second mixed gas holding unit 193. 197 ₇ via is connected to the total flow adjuster 5 (6 passage ₁₉₅ 6). The second mixed gas holding unit 193 is also connected to the tenth valve _{197 10} from between the fifth flow path 195 ₅ of the 12 valves _{197 12} and the second mixed gas holding portion 193. Hydrogen fuel holding portion 187 from the ninth valve 197 _9, 10 valve _{197 10,} second flow regulating unit 199 ₂ of the sixth flow path 195 _6, via a seventh valve 197 ₇ of the third flow path 195 ₃ All the is the channel connected to the flow rate adjuster 5 to the seventh flow path 195 _7.

  The control module 45 controls the gas flow rate adjustment unit 179 and the flow path unit 177.

  Hereinafter, an impurity concentration measurement method by the impurity concentration measurement unit 173 will be described. The impurity concentration measurement method is roughly divided into a calibration curve creation step and a concentration measurement step.

  A flow for creating a calibration curve using the impurity concentration measuring unit 173 will be described with reference to FIGS. The calibration curve creation unit 183 measures the hydrogen gas mixed with the first concentration of impurities known to have an impurity concentration of about 2 ppm and the hydrogen gas mixed with the known second concentration of impurities of about 200 ppm, thereby calibrating the calibration curve. Create

Referring to FIG. 14, first, measurement is performed using hydrogen gas having an impurity concentration of 2 ppm. In the first flow path 195 ₁ and the second flow path 195 ₂ open the third flow path 195 ₃ closed the seventh flow path 195 _7, the first flow of high purity gaseous hydrogen from the hydrogen holding portion 189 the road 195 ₁ and the second flow path 195 ₂ purge for 180 seconds (step ST001). Subsequently, with open fourth flow path 195 ₄ closes the first flow path 195 ₁ and the second flow path 195 _2, the first mixed gas and the fourth flow 60 seconds from the first mixing gas holding portion 191 flowing in the road 195 _4. The first gas flow rate adjusting unit 199 ₁ is set to flow a gas of 100 ml / min. At this time, the voltage in the diagnostic sensor 55 changes according to the concentration of impurities such as carbon monoxide contained in the first mixed gas. The detection module 47 measures the voltage at the diagnostic sensor 55 and detects the presence and concentration of impurities as a change in voltage. Storage unit 185 stores a value _{V 1} of the voltage at this time (step ST002). Subsequently, closing the fourth flow path 195 _4, opens the first flow path 195 ₁ and the second flow path 195 _2, purged again 180 seconds. During this time, the detection module 47 measures the voltage. Storage unit 185 stores the maximum value _{V 2} of the voltage for 180 seconds (step ST003). Storage unit 185 stores V _{2 ppm} = V ₂ −V ₁ as a voltage value at _{2 ppm} (step ST004).

As zero value calibration, in the first flow path 195 ₁ and the second flow path 195 ₂ a third flow path 195 ₃ Open closed the seventh flow path 195 _7, high purity gas from the hydrogen holding portion 189 to the first passage 195 ₁ and the second flow path 195 ₂ purge for 60 seconds with hydrogen. The storage unit 185 stores the voltage value V ₃ at this time. Further, purging is performed for 180 seconds, and the storage unit 185 stores the voltage value V ₄ at this time. Storage unit 185 stores V ₀ = V ₄ −V ₃ as a zero calibration value (step ST005). Further, V _2ppm0 = V _2ppm -V ₀ is stored as a value at 2 ppm of the calibration curve after calibration (step ST006).

Subsequently, referring to FIG. 15, measurement is performed using hydrogen gas having an impurity concentration of 200 ppm. In a state where the second flow path 195 ₂ and the fourth flow path 195 ₄ Open first flow path 195 ₁ and the third flow path 195 ₃ closing the seventh flow path 195 _7, high-purity hydrogen holder 189 in gaseous hydrogen through the first flow passage 195 ₁ and the third flow path 195 ₃ purged for 180 seconds (step ST 101). Subsequently, with open first flow path 195 ₁ and the sixth flow path 195 ₆ closes the third flow path 195 _3, the high purity of the gaseous hydrogen the first flow path 195 ₁ from the hydrogen holding portion 189 while it is flowing, flowing a second mixed gas from the second mixed gas holding portion 193 to the sixth flow path 195 ₆ 60 seconds. Here, since the second flow regulating unit 199 ₂ of the sixth flow path 195 ₆ limits the flow rate to 1 ml / min, high purity gaseous hydrogen in the first flow path 195 ₁ 99 ml / min gaseous hydrogen Is supplied. Storage unit 185 stores a value _{V 5} of the voltage at this time (step ST 102). Subsequently, with open first flow path 195 ₁ and the third flow path 195 ₃ closes the sixth flow path 195 _6, purged again 180 seconds. Storage unit 185 stores the maximum value _{V 6} of the voltage for 180 seconds (step ST 103). Storage unit 185 stores V _{200 ppm} = V ₆ -V ₅ as a voltage value at _{200 ppm} (step ST104). Similar to step ST005, a zero calibration value is obtained (step ST105). Storage unit 185 stores V 200 _ppm0 as a value at 200 ppm of the calibration curve after calibration (step ST106).

The calibration curve creation unit 183 creates a calibration curve from values of V 2 _ppm0 and V _{200 ppm0} .

Here, in order to create a more accurate calibration curve, a flow for obtaining a 1 ppm plot will be described. In step ST002, with open first flow path 195 ₁ and the fourth flow path 195 ₄ closes the second flow path 195 _2, the first mixed gas from the first mixed gas holding part 191 fourth channel while flowing the 195 _4, carrying high purity gaseous hydrogen from the first flow path 195 ₁ to the hydrogen holding portion 189. The first flow regulating portion 199 ₁ of the fourth flow path 195 ₄ sets to flow 50ml / min flow rate gas. The storage unit 185 stores a voltage value V5 after 60 seconds. Steps ST003 to ST006 are the same.

Alternatively, different plots can be obtained by controlling the outflow time of the gas from the holding part where the mixed gas is held. For example, in step ST002, with open fourth flow path 195 ₄ closes the first flow path 195 ₁ and the second flow path 195 _2, the first gas flow adjustment unit 199 ₁ is flow 100ml / min gas Keep the setting. However, the first mixed gas from the first mixed gas holding unit 191 is allowed to flow through the fourth flow path for 30 seconds, which is half of 60 seconds. A plot corresponding to 1 ppm can also be obtained from the voltage value at this time. In this case, steps ST001 to ST006 in which the voltage value corresponding to 2 ppm is obtained is an example of the “first diagnosis step” in the claims of the present application, and the step in which the voltage value corresponding to 1 ppm is obtained is “second” in the claims of the present application. It is an example of a “diagnosis step”.

  A more accurate calibration curve can be created by obtaining plots of 0.2 ppm, 20 ppm, 100 ppm, etc. in the same manner as the above flow for obtaining a 1 ppm plot.

  Next, a flow for measuring the impurity concentration of the hydrogen fuel using the impurity concentration measuring unit 173 will be described with reference to FIG. First, a case where an impurity of about 0 to 2 ppm is assumed to be mixed in the hydrogen fuel will be described.

First, open the first flow path 195 ₁ and the second flow path 195 _2, in a state in which the third flow path 195 ₃ closing the seventh flow path 195 _7, a high-purity gaseous hydrogen from the hydrogen holding portion 189 the first flow path 195 ₁ and the second flow path 195 ₂ is purged for 180 seconds (step ST 201). Subsequently, closing the first flow path 195 ₁ and the second flow path 195 _2, with open fifth flow path 195 _5, the hydrogen fuel from the hydrogen fuel holding portion 187 to the fifth flow path 195 ₅ 60 seconds Shed. At this time, the voltage at the diagnostic sensor 55 changes according to the concentration of impurities such as carbon monoxide contained in the hydrogen fuel. The detection module 47 measures the voltage at the diagnostic sensor 55 and detects the presence and concentration of impurities as a change in voltage. The impurity concentration calculator 181 calculates the corresponding concentration value A using the calibration curve. Storage unit 185 stores the value of A (step ST202). Subsequently, closing the fifth flow path 195 _5, to the first flow path 195 ₁ and the second flow path 195 ₂ purged again 180 seconds open. The impurity concentration calculation unit 181 uses the calibration curve to calculate the concentration value B corresponding to the maximum voltage for 180 seconds using the calibration curve. Storage unit 185 stores the value of B (step ST203). Subsequently, an impurity concentration value C is obtained by the same operation as in step ST202. Storage unit 185 stores the value of C (step ST204). Further, the impurity concentration value D is obtained by the same operation as in step ST203. Storage unit 185 stores the value of D (step ST205). Here, the values A to D are all values after zero value calibration.

  The impurity concentration calculation unit 181 calculates the impurity concentration by a calculation formula of {(BA) + (DC)} / 2. The storage unit 185 stores the calculated impurity concentration. The control module 45 displays the calculation result on the display unit 25 (step ST206). The control module 45 determines whether the specified number of times has been reached (step ST207). If the specified number of times has not been reached, the process returns to step ST202 after a predetermined time and is repeated. If the specified number of times has been reached, the flow ends. In step ST207, it may be determined whether or not the specified time has passed instead of the specified number of times.

If you expect to contamination 2~200ppm about impurities, in step ST 202, opens the first flow path 195 ₁ and the seventh flow path 195 ₇ instead of opening the fifth flow path 195 _5. The second flow regulating unit 199 ₂ of the seventh flow path 195 ₇ are the flow rates of the order of 1.0 ml / min, the measurement unit 29 reaches the hydrogen fuel impurities of about 0.02~2ppm is mixed . For this reason, it is not necessary to largely change the measurement range of the measurement system as compared with the case where contamination of about 0 to 2 ppm is assumed.

  Note that the temperature / humidity adjusting device may also control the temperature of the drying flow rate adjusting unit. Thereby, it becomes easy to suppress the temperature change of the dried gas before reaching the confluence. Therefore, the temperature control of the gas after reaching the confluence is further facilitated.

  The temperature / humidity adjusting apparatus may further include a first microvalve between the gas supply unit and the humidification channel, and may further include a second microvalve between the humidification channel and the junction.

  Furthermore, the impurity concentration measurement unit may include a third mixed gas holding unit that holds gaseous hydrogen containing impurities having a third concentration different from the first concentration and the second concentration.

  Further, the impurity concentration calculation unit may calculate the impurity concentration by the formula B−A using A and B obtained in steps ST202 and ST203.

  DESCRIPTION OF SYMBOLS 1 ... Temperature / humidity adjustment apparatus, 5 ... Total flow rate adjustment part, 7 ... Branch, 9 ... Humidifier, 11 ... Drying flow rate adjustment part, 13 ... Confluence, 17 ... Micro flow path, 19 ... micro valve, 21 ... temperature control unit, 23 ... humidity control unit, 29 ... measurement unit, 31 ... humidification flow channel, 33 ... water vapor application unit 35 ... electric heater, 37 ... relative humidity measuring unit, 39 ... temperature measuring unit, 41 ... hydrogen fuel diagnostic device, 43 ... diagnostic unit, 45 ... control module, 47 ... .. detection module, 53... Temperature / humidity sensor, 55 .. diagnostic sensor, 57... Measuring unit temperature control unit, 171... Aptitude diagnostic device, 173. -Gas holding part, 177 ... flow path part, 179 ... gas flow rate adjustment part, 181 ... impurity concentration calculation part, 83 ... calibration curve creation unit, 185 ... storage unit, 187 ... hydrogen fuel holding unit, 189 ... hydrogen holding unit, 191 ... first mixed gas holding unit, 193 ... second Mixed gas holding unit, 195 ... flow path, 197 ... valve, 199 ... gas flow rate adjusting unit

Claims (13)

A temperature / humidity adjusting device for adjusting the temperature and humidity of a gas,
A humidifying channel that is a channel through which the gas passes and that increases or decreases the amount of surrounding water vapor taken in according to temperature,
A water vapor application part for applying water vapor to the periphery of the humidification flow path and humidifying the water;
An electric heater for heating in contact with the humidification channel;
A temperature / humidity adjustment apparatus comprising: a temperature control unit that controls the electric heater. Further comprising a measuring means for measuring the relative humidity value inside the flow path through the humidification flow path,
The temperature / humidity adjusting device according to claim 1, wherein the temperature control unit controls the electric heater based on a relative humidity value inside the flow path that has passed through the humidification flow path. A drying flow rate adjusting unit for adjusting the flow rate of the gas in the flow path not passing through the humidification flow path;
A humidity control unit for controlling the drying flow rate adjustment unit;
The temperature / humidity adjusting device according to claim 1 or 2, wherein the flow path for allowing the gas to flow out from the drying flow rate adjusting unit is connected to a junction point in the flow path for the gas to flow out from the humidifying flow path. A gas supply unit for supplying the gas to the humidification channel;
The temperature and humidity according to claim 3, further comprising a microvalve that controls a flow rate of the gas between the gas supply unit and the humidification channel and / or between the humidification channel and the junction. Adjustment device.   The temperature / humidity adjusting device according to claim 4, further comprising a minute channel having a narrower channel than the humidifying channel between the microvalve and the humidifying channel. A humidity adjusting device for adjusting the humidity of gas,
A humidifying channel that is a channel through which the gas passes and that increases or decreases the amount of surrounding water vapor taken in according to temperature,
A water vapor application part for applying water vapor to the periphery of the humidification flow path and humidifying the water;
A drying flow rate adjusting unit for adjusting the flow rate of the gas in the flow path not passing through the humidification flow path;
A humidity control unit that controls the drying flow rate adjustment unit;
A gas supply unit for supplying the gas to the humidification channel;
A microvalve for controlling the flow rate of the gas flowing into the humidification channel or the flow rate of the gas flowing out of the humidification channel;
The humidity adjusting device, wherein the flow path for causing the gas to flow out from the drying flow rate adjusting unit is connected to a junction point in the flow path for the gas to flow out from the humidifying flow path. An aptitude diagnosis device for diagnosing the suitability of hydrogen fuel as a fuel,
A temperature and humidity adjusting unit for adjusting the temperature and humidity of the hydrogen fuel;
A measurement unit that measures the relative humidity of the hydrogen fuel, the temperature and humidity of which have been adjusted by the temperature and humidity adjustment unit;
A diagnostic unit for diagnosing the suitability of the hydrogen fuel as a fuel by diagnosing the hydrogen fuel;
A flow path for flowing the hydrogen fuel in the order of the temperature and humidity adjustment unit, the measurement unit and the diagnosis unit,
The temperature and humidity adjustment unit is
A humidifying channel through which the hydrogen fuel passes and in which the amount of ambient water vapor taken in is increased or decreased according to the temperature;
A water vapor application part for applying water vapor to the periphery of the humidification flow path and humidifying the water;
An electric heater for heating in contact with the humidification channel;
An aptitude diagnosis device comprising: a temperature control unit that controls the electric heater. A calibration curve creating unit for creating a calibration curve of the concentration of impurities in the hydrogen fuel;
The calibration curve creation unit
Measuring a voltage when a first sample, which is a hydrogen fuel containing the impurity having a known first concentration, is caused to flow through the flow path;
The aptitude diagnosis apparatus according to claim 7, wherein a voltage when a second sample, which is a hydrogen fuel containing the impurity having a known second concentration different from the first concentration, is caused to flow through the flow path is measured. The second concentration is higher in concentration of the impurity than the first concentration,
The calibration curve creation unit further includes a concentration-dependent flow rate adjustment unit,
The aptitude diagnosis apparatus according to claim 8, wherein the concentration-dependent flow rate adjustment unit makes the flow rate slower when measuring the impurity concentration of the second sample than when measuring the impurity concentration of the first sample. A temperature and humidity adjustment method for adjusting the temperature and humidity of a gas,
The temperature control unit controls the electric heater based on the value of the relative humidity inside the flow path through the humidification flow path through which the gas passes and the amount of the surrounding water vapor is increased or decreased according to the temperature. A method for adjusting temperature and humidity, comprising the step of heating the humidification channel. An aptitude diagnosis method using an aptitude diagnosis device for diagnosing the suitability of hydrogen fuel as a fuel,
The aptitude diagnosis device is:
A humidifying channel through which the hydrogen fuel passes and in which the amount of ambient water vapor taken in is increased or decreased according to the temperature;
An electric heater for heating the humidification channel;
A temperature control unit for controlling the electric heater;
A measurement unit for measuring the relative humidity of the hydrogen fuel whose temperature and humidity are adjusted in the humidification channel;
A diagnostic unit for diagnosing the suitability of the hydrogen fuel as a fuel by diagnosing the hydrogen fuel;
A flow path for flowing the hydrogen fuel in the order of the humidification flow path, the measurement section and the diagnosis section,
The aptitude diagnosis method including a step in which the temperature control unit controls the electric heater based on a measurement result of relative humidity measured by the measurement unit to heat the humidification flow path. The aptitude diagnosis device is:
A calibration curve creating section for creating a calibration curve of the concentration of impurities in the hydrogen fuel;
A mixed gas holding unit containing impurities of a known concentration,
A first diagnostic step in which the diagnostic unit diagnoses after the calibration curve creation unit flows the gas from the mixed gas holding unit through the flow channel for a first time;
The calibration curve creation unit further includes a second diagnostic step in which the diagnostic unit diagnoses after flowing the gas from the mixed gas holding unit through the flow path for a second time different from the first time. 11. The aptitude diagnosis method according to 11.   The program which makes a computer function as a temperature control part of Claim 10.