Hydrogen generator

Abstract

It provides a stable supply of hydrogen gas when switching cartridges. [Solution] A hydrogen generator comprising a water supply device for supplying water to a first cartridge and a second cartridge, a main hydrogen supply channel, a first hydrogen supply valve for opening and closing the first hydrogen supply channel that supplies hydrogen gas from the first cartridge to the main hydrogen supply channel, a second hydrogen supply valve for opening and closing the second hydrogen supply channel that supplies hydrogen gas from the second cartridge to the main hydrogen supply channel, and a purge valve. When switching the hydrogen supply source from the first cartridge to the second cartridge, the pressure inside the first cartridge is increased, hydrogen is supplied from the first cartridge to the main hydrogen supply channel while purging the second cartridge and increasing the pressure inside the second cartridge, and hydrogen is supplied from the second cartridge to the main hydrogen supply channel.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a hydrogen generator.

[0002] There is known a hydrogen generator that generates hydrogen gas using a cartridge containing a substance that reacts with water to generate hydrogen gas. For example, Patent Document 1 discloses a hydrogen generator that uses a cartridge containing a substance (specifically, a catalyst) that reacts with water (specifically, an aqueous solution) to generate hydrogen gas. The cartridge is detachable from the hydrogen generator. The hydrogen generator generates hydrogen gas by supplying water into the cartridge and supplies the generated hydrogen gas to an external device (e.g., a fuel cell).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the hydrogen generator of Patent Document 1, since there is only one cartridge attachment part, the hydrogen generator cannot be used during the replacement of the cartridge. Therefore, the continuous operation time of the hydrogen generator of Patent Document 1 is short. On the other hand, by providing a plurality of cartridge attachment parts in the hydrogen generator and switching the cartridges to be used, the continuous operation time of the hydrogen generator can be lengthened. In this specification, a technique for stably supplying hydrogen gas when switching the cartridges to be used in a hydrogen generator capable of attaching a plurality of cartridges is proposed.

Means for Solving the Problems

[0005] The first hydrogen generator disclosed herein includes a first mounting section and a second mounting section to which cartridges containing a substance that reacts with water to generate hydrogen gas are attached; a water supply device for supplying water to a first cartridge attached to the first mounting section and a second cartridge attached to the second mounting section; a main hydrogen supply passage for supplying hydrogen gas to an external device; a first hydrogen supply passage for supplying hydrogen gas from the first cartridge to the main hydrogen supply passage; a second hydrogen supply passage for supplying hydrogen gas from the second cartridge to the main hydrogen supply passage; a first hydrogen supply valve for opening and closing the first hydrogen supply passage; a second hydrogen supply valve for opening and closing the second hydrogen supply passage; a purge valve for opening and closing a passage that opens the second cartridge to the outside air; and a control device for controlling the water supply device, the first hydrogen supply valve, the second hydrogen supply valve, and the purge valve. When the water supply device is controlled to stop supplying water to the second cartridge and to supply water to the first cartridge, and the first hydrogen supply valve is opened to supply hydrogen gas from the first cartridge to the main hydrogen supply path, the control device performs a first process to increase the amount of water supplied to the first cartridge by the water supply device and raise the pressure inside the first cartridge, and after the first process, the water supply device is controlled to stop supplying water to the first cartridge and to supply water to the second cartridge, and the first hydrogen supply valve is opened to supply hydrogen gas from the first cartridge to the second cartridge. The following processes are performed: a second process in which hydrogen is supplied to the main hydrogen supply line, the second hydrogen supply valve is closed and the purge valve is opened to purge the second cartridge; a third process in which, after the second process, the water supply device is controlled to stop supplying water to the first cartridge and to supply water to the second cartridge, the first hydrogen supply valve is opened to supply hydrogen from the first cartridge to the main hydrogen supply line, and the second hydrogen supply valve and the purge valve are closed to increase the pressure inside the second cartridge; and a fourth process in which, after the third process, the first hydrogen supply valve is closed and the second hydrogen supply valve is opened to supply hydrogen from the second cartridge to the main hydrogen supply line.

[0006] Furthermore, the "water" in the above-mentioned "substance that reacts with water to generate hydrogen gas" may be pure water or an aqueous solution.

[0007] In this hydrogen generator, the control unit increases the pressure in the first cartridge by performing the first process before the second and third processes. In the second process, the control unit supplies water to the second cartridge to purge it, and in the third process, it supplies water to the second cartridge to increase the pressure inside it. In other words, the second and third processes prepare the second cartridge for use. Subsequently, in the fourth process, hydrogen gas is supplied from the second cartridge to the main hydrogen supply line. During the execution of the second and third processes, hydrogen gas is supplied to the main hydrogen supply line from the first cartridge, whose internal pressure has been increased in advance. Therefore, when switching the hydrogen supply source from the first cartridge to the second cartridge, the hydrogen supply to the main hydrogen supply line is not interrupted. Thus, this hydrogen generator can stably supply hydrogen gas when switching between cartridges.

[0008] A second hydrogen generator disclosed herein includes a mounting section to which a cartridge containing a substance that reacts with water to generate hydrogen gas is attached; a fan that generates an airflow; a condenser having an internal passage through which hydrogen gas supplied from the cartridge attached to the mounting section flows, and which condenses water vapor in the hydrogen gas in the internal passage by cooling the hydrogen gas in the internal passage with the airflow generated by the fan; a hydrogen supply path that supplies the hydrogen gas that has passed through the condenser to an external device; and a fuel cell that generates electricity by reacting the hydrogen gas that has passed through the condenser with air supplied by the fan.

[0009] In this hydrogen generator, a portion of the hydrogen gas that passes through the condenser is used by the fuel cell to generate electricity, allowing the electricity generated by the fuel cell to be supplied to various parts of the hydrogen generator. Furthermore, since air is supplied to the fuel cell by a cooling fan for the condenser, the hydrogen generator can be made more compact. [Brief explanation of the drawing]

[0010] [Figure 1] Perspective view of the hydrogen supply device of Example 1. [Figure 2] A diagram showing the paths of hydrogen gas and water in the hydrogen generator of Example 1. [Figure 3] A diagram showing the paths of hydrogen gas and water at each stage of the hydrogen generator in Example 1. [Figure 4] A flowchart illustrating the switching process in Example 1. [Figure 5] A diagram showing the paths of hydrogen gas and water in the hydrogen generator of Example 2. [Figure 6] A flowchart showing the startup process for Example 2. [Figure 7] A diagram showing the paths of hydrogen gas and water in the hydrogen generator of Example 3. [Figure 8] A flowchart showing the startup process for Example 3. [Figure 9] A diagram showing the arrangement of the fuel cell 70 in modified example 1. [Figure 10] A diagram showing the arrangement of the fuel cell 70 in modified example 2. [Modes for carrying out the invention]

[0011] In the first hydrogen generator described above, if the pressure in the first cartridge falls below a reference value during the execution of at least one of the second and third processes, the control device may perform a fifth process to increase the pressure in the first cartridge by controlling the water supply device to stop supplying water to the second cartridge and to supply water to the first cartridge while maintaining the first hydrogen supply valve in an open state, and then return to the original process.

[0012] This configuration prevents a decrease in the amount of hydrogen supplied to the main hydrogen supply line due to a pressure drop in the first cartridge.

[0013] In the second hydrogen generator described above, the fuel cell may be disposed upstream of the condenser in the path of the air flow generated by the fan. The fuel cell may be disposed to face the condenser at a portion upstream of the central portion in the path of the hydrogen gas in the condenser.

[0014] According to this configuration, the hydrogen gas can be efficiently cooled by the condenser.

[0015] In the second hydrogen generator described above, the fuel cell may be disposed downstream of the condenser in the path of the air flow generated by the fan. The fuel cell may be disposed to face the condenser at a portion downstream of the central portion in the path of the hydrogen gas in the condenser.

[0016] According to this configuration, an excessive temperature rise of the fuel cell can be suppressed.

[0017] The second hydrogen generator may further include an electric pump for supplying water to the cartridge, a control device, and a starting power source. When starting the hydrogen generator, the control device is started by the power of the starting power source, and power is supplied from the starting power source to the electric pump. Water is supplied from the electric pump to the cartridge, hydrogen gas is supplied from the cartridge to the fuel cell, and a first starting process of generating power by the fuel cell may be executed. After the first starting process, the control device may execute a second starting process of supplying power from the fuel cell to the control device and the electric pump.

[0018] According to this configuration, the hydrogen generator can be suitably started.

[0019] The hydrogen generator having the starting power source may further include a first flow path for supplying hydrogen gas from the cartridge to the condenser, a solenoid valve for opening and closing the first flow path, and a second flow path for bypassing the solenoid valve from the cartridge and supplying hydrogen gas to the fuel cell. In the first starting process, hydrogen gas may be supplied from the cartridge to the fuel cell through the second flow path. In the second starting process, the control device may open the solenoid valve, and hydrogen gas may be supplied from the cartridge to the fuel cell through the first flow path.

[0020] The second hydrogen generator may further include an electric pump for supplying water to the cartridge, a manual pump for supplying water to the cartridge, and a control device. When starting the hydrogen generator, a first starting process may be executed in which water is supplied from the manual pump to the cartridge, hydrogen gas is supplied from the cartridge to the fuel cell, and the control device is started by the electric power generated by the fuel cell. After the first starting process, the control device may execute a second starting process of supplying power from the fuel cell to the electric pump.

[0021] According to this configuration, the hydrogen generator can be preferably started.

[0022] The hydrogen generator having the manual pump may further include a first flow path for supplying hydrogen gas from the cartridge to the condenser, a solenoid valve for opening and closing the first flow path, and a second flow path for bypassing the solenoid valve from the cartridge and supplying hydrogen gas to the fuel cell. In the first starting process, hydrogen gas may be supplied from the cartridge to the fuel cell through the second flow path. In the second starting process, the control device may open the solenoid valve, and hydrogen gas may be supplied from the cartridge to the fuel cell through the first flow path.

Example

[0023] As shown in Figure 1, the hydrogen generator 10 of Example 1 has a first slot hole 11 and a second slot hole 12 provided on its side. The cartridge C can be attached to the hydrogen generator 10 by inserting it into each of the slot holes 11 and 12. The cartridge C is a type of reaction vessel and contains a hydrogen generating agent inside. The hydrogen generating agent is a substance that generates hydrogen gas (i.e., H2) when it reacts with water, and in this example it is sodium borohydride. The cartridge C is detachable from the slot holes 11 and 12. Hereinafter, the cartridge attached to the first slot hole 11 will be referred to as cartridge C1, and the cartridge attached to the second slot hole 12 will be referred to as cartridge C2.

[0024] Figure 2 is a path diagram showing the paths of hydrogen gas and water inside the hydrogen generator 10. In Figure 2, the solid lines represent the paths of hydrogen gas, and the dashed lines represent the paths of water.

[0025] The hydrogen generator 10 has a water tank 56 and a water supply pipe 54. Water (more specifically, pure water) is stored in the water tank 56. The upstream end of the water supply pipe 54 is connected to the water tank 56. The downstream part of the water supply pipe 54 branches into two branch pipes 54a and 54b. When cartridge C1 is installed in the hydrogen generator 10, the downstream end of branch pipe 54a is connected to cartridge C1. When cartridge C2 is installed in the hydrogen generator 10, the downstream end of branch pipe 54b is connected to cartridge C2. A pump 50 is provided in the upstream part of the water supply pipe 54 (i.e., the unbranched part). The pump 50 sends the water in the water supply pipe 54 downstream. Branch pipe 54a is provided with a valve VW1 that opens and closes branch pipe 54a. Branch pipe 54b is provided with a valve VW2 that opens and closes branch pipe 54b. The water supply pipe 54 supplies water from the water tank 56 to cartridges C1 and C2. When water is injected into cartridge C1 from the water supply pipe 54, hydrogen gas is generated when the hydrogen generating agent reacts with water inside cartridge C1. When water is injected into cartridge C2 from the water supply pipe 54, hydrogen gas is generated when the hydrogen generating agent reacts with water inside cartridge C2. The water supply pipe 54 selectively supplies water to cartridges C1 and C2. That is, when water is being supplied to cartridge C1, water is not supplied to cartridge C2, and when water is being supplied to cartridge C2, water is not supplied to cartridge C1.

[0026] The hydrogen generator 10 has a first hydrogen supply pipe 21, a second hydrogen supply pipe 22, and a main hydrogen supply pipe 26. When cartridge C1 is installed in the hydrogen generator 10, the upstream end of the first hydrogen supply pipe 21 is connected to cartridge C1. When cartridge C2 is installed in the hydrogen generator 10, the upstream end of the second hydrogen supply pipe 22 is connected to cartridge C2. The downstream ends of the first hydrogen supply pipe 21 and the second hydrogen supply pipe 22 are connected to the upstream end of the main hydrogen supply pipe 26. The downstream end of the main hydrogen supply pipe 26 is connected to an external device 99 (for example, a fuel cell system) installed outside the hydrogen generator 10. The first hydrogen supply pipe 21 supplies hydrogen gas from cartridge C1 to the main hydrogen supply pipe 26. The second hydrogen supply pipe 22 supplies hydrogen gas from cartridge C2 to the main hydrogen supply pipe 26. The hydrogen gas supplied from cartridges C1 and C2 is supplied to the external device 99 via the main hydrogen supply pipe 26.

[0027] The first hydrogen supply pipe 21 is equipped with a valve VH1 for opening and closing the first hydrogen supply pipe 21. Upstream of the valve VH1, the first hydrogen supply pipe 21 is equipped with a pressure sensor PS1. The pressure sensor PS1 detects the pressure P1 inside the cartridge C1. One end of the purge pipe 23 is connected to the first hydrogen supply pipe 21 upstream of the valve VH1. The other end of the purge pipe 23 is equipped with a check valve. The check valve of the purge pipe 23 allows gas to flow out of the purge pipe 23 to the outside of the hydrogen generator 10, while preventing gas from flowing into the purge pipe 23 from the outside. When the check valve opens, the cartridge C1 is exposed to the outside air. The purge pipe 23 is equipped with a purge valve VO1 for opening and closing the purge pipe 23.

[0028] The second hydrogen supply pipe 22 is equipped with a valve VH2 for opening and closing the second hydrogen supply pipe 22. Upstream of the valve VH2 in the second hydrogen supply pipe 22, a pressure sensor PS2 is provided. The pressure sensor PS2 detects the pressure P2 inside the cartridge C2. One end of the purge pipe 24 is connected to the second hydrogen supply pipe 22 upstream of the valve VH2. The other end of the purge pipe 24 is equipped with a check valve. The check valve of the purge pipe 24 allows gas to flow out of the purge pipe 24 to the outside of the hydrogen generator 10, while preventing gas from flowing into the purge pipe 24 from the outside. When the check valve opens, the cartridge C2 is opened to the outside air. The purge pipe 24 is equipped with a purge valve VO2 for opening and closing the purge pipe 24.

[0029] The main hydrogen supply pipe 26 is equipped with a condenser 30, a gas-liquid separator 32, a regulator 34, and a valve 36, in that order from the upstream side. The valve 36 opens and closes the main hydrogen supply pipe 26. When the valve 36 opens, hydrogen gas flows into the main hydrogen supply pipe 26 toward the external device 99.

[0030] The condenser 30 has an internal flow path through which hydrogen gas flows. The internal flow path of the condenser 30 forms part of the main hydrogen supply pipe 26. A cooling fan 31 is provided next to the condenser 30. When the fan 31 rotates, air (i.e., outside air) is introduced into the condenser 30. The condenser 30 cools the hydrogen gas inside the internal flow path (i.e., the main hydrogen supply pipe 26) by heat exchange with the air. The hydrogen gas generated in cartridges C1 and C2 contains water vapor. The condenser 30 condenses the water vapor in the hydrogen gas by cooling the hydrogen gas in the main hydrogen supply pipe 26.

[0031] Hydrogen gas and liquid water that have passed through the condenser 30 flow into the gas-liquid separator 32. The gas-liquid separator 32 separates water from the hydrogen gas. The gas-liquid separator 32 is connected to the water tank 56 by a drain pipe 58. The water separated from the hydrogen gas in the gas-liquid separator 32 is returned to the water tank 56 via the drain pipe 58.

[0032] The hydrogen gas separated from the water in the gas-liquid separator 32 flows downstream through the main hydrogen supply pipe 26. The regulator 34 adjusts the pressure of the hydrogen gas supplied to the external device 99.

[0033] The hydrogen generator 10 has a control device 90. The control device 90 controls valves VH1, VW1, VO1, VH2, VW2, VO2, pump 50, fan 31, and valve 36. The control device 90 also receives the detected values ​​from pressure sensors PS1 and PS2.

[0034] The valves VH1, VW1, VO1, VH2, VW2, VO2, and 36 mentioned above are solenoid valves.

[0035] Next, the operation of supplying hydrogen gas to the external device 99 will be described. When supplying hydrogen gas to the external device 99, the fan 31 is activated and the valve 36 is controlled to be in the open state. In the following description of the operation, it will be assumed that the fan 31 is activated and the valve 36 is open. The hydrogen generator 10 can perform a first operation of supplying hydrogen gas from cartridge C1 to the external device 99, and a second operation of supplying hydrogen gas from cartridge C2 to the external device 99.

[0036] In the first operation, the control device 90 operates the pump 50 and controls the valves VH1, VW1, VO1, VH2, VW2, and VO2 as follows. Valve VH1: Open Valve VW1: Open Valve VO1: Closed Valve VH2: Closed Valve VW2: Closed Valve VO2: Closed

[0037] Figure 3(a) shows the first operation. In the first operation, valve VW2 is closed and valve VW1 is open, so water delivered by pump 50 is injected into cartridge C1. As a result, hydrogen gas is generated in cartridge C1. Since valve VH1 is open, hydrogen gas is supplied from cartridge C1 to the main hydrogen supply pipe 26. The hydrogen gas in the main hydrogen supply pipe 26 is supplied to the external device 99. Also in the first operation, the control device 90 provides feedback control to pump 50 based on the pressure P1 in cartridge C1 (i.e., the value detected by pressure sensor PS1). The control device 90 adjusts the amount of water supplied to cartridge C1 by operating pump 50 intermittently, controlling the pressure P1 in cartridge C1 to approximately 190 kPa.

[0038] Next, we will explain the switching process, which involves switching from the first operation of supplying hydrogen gas from cartridge C1 to the external device 99 to the second operation of supplying hydrogen gas from cartridge C2 to the external device 99. The flowchart in Figure 4 shows the switching process. The control device 90 executes the process in Figure 4 when a cartridge switch is necessary, such as when the usage time of cartridge C1 exceeds a reference value. At the timing of the start of the switch in Figure 4, the control device 90 is executing the first operation (i.e., Figure 3(a)).

[0039] In step S2, the control device 90 executes the C1 pressure increase operation A. The C1 pressure increase operation A is an operation that increases the pressure P1 inside cartridge C1. Here, the control device 90 operates the pump 50 continuously without changing the state of valves VH1, VW1, VO1, VH2, VW2, and VO2 from the first operation, increasing the amount of water supplied to cartridge C1. As a result, the amount of hydrogen gas generated inside cartridge C1 increases, and the pressure P1 rises. In step S2, as shown in Figure 3(a), the supply of hydrogen gas from cartridge C1 to the main hydrogen supply pipe 26 continues while the pressure P1 inside cartridge C1 rises. In step S4, the control device 90 determines whether the pressure P1 inside cartridge C1 exceeds 210 kPa. The control device 90 continues the C1 pressure increase operation A by repeating steps S2 and S4 until the pressure P1 exceeds 210 kPa.

[0040] When the pressure P1 exceeds 210 kPa, the control device 90 determines YES in step S4 and executes the C2 purge operation in step S6. The C2 purge operation is the operation to purge cartridge C2. Here, the control device 90 controls the valves as follows. When switching each valve, the control device 90 first stops the pump 50, then switches each valve, and then operates the pump 50. Valve VH1: Open Valve VW1: Closed Valve VO1: Closed Valve VH2: Closed Valve VW2: Open Valve VO2: Open

[0041] Figure 3(b) shows the state of each part during the C2 purge operation. Since valve VW1 is closed, water injection into cartridge C1 is stopped. Also, since valve VW2 is open, water supplied by pump 50 is injected into cartridge C2. As a result, hydrogen gas is generated in cartridge C2. Since valve VH2 is closed and purge valve VO2 is open, the gas in cartridge C2 is released to the outside through purge valve VO2. Before use, cartridge C2 is sealed with an inert gas (for example, nitrogen gas). As shown in Figure 3(b), purging cartridge C2 releases the inert gas inside cartridge C2 to the outside of the hydrogen generator 10. This prevents the inert gas from flowing into the main hydrogen supply pipe 26 in a later step. When the control device 90 starts the C2 purge operation, it counts the execution time of the C2 purge operation.

[0042] Furthermore, during the C2 purge operation, the pressure inside cartridge C1 is high and valve VH1 is open, so hydrogen gas flows from cartridge C1 to the main hydrogen supply pipe 26 as shown in Figure 3(b). In this way, the supply of hydrogen gas from cartridge C1 to the main hydrogen supply pipe 26 continues during the C2 purge operation. Note that since water injection into cartridge C1 is stopped, the pressure P1 inside cartridge C1 gradually decreases during the C2 purge operation.

[0043] In step S8, the control device 90 determines whether the pressure P1 inside cartridge C1 is higher than 190 kPa. Also, in step S10, the control device 90 determines whether the execution time of the C2 purge operation has exceeded the reference time. As long as the pressure P1 is higher than 190 kPa and the execution time of the C2 purge operation is less than or equal to the reference time, the control device 90 repeats steps S6, S8, and S10 to continue the C2 purge operation. If the pressure P1 inside cartridge C1 drops to 190 kPa or less during the C2 purge operation, the control device 90 determines NO in step S8 and executes the C1 pressure increase operation B in step S12.

[0044] The C1 pressure increase operation B is an operation that increases the pressure P1 inside cartridge C1. Here, the control device 90 controls the valves as follows. When switching each valve, the control device 90 first stops the pump 50, then switches each valve, and then operates the pump 50. Valve VH1: Open Valve VW1: Open Valve VO1: Closed Valve VH2: Closed Valve VW2: Closed Valve VO2: Open

[0045] In C1 pressure rise operation B, valve VO2 is open, which is different from C1 pressure rise operation A (i.e., Figure 3(a)). In C1 pressure rise operation B, valves VH1, VW1, VO1, VH2, and VW2 are controlled in the same way as in C1 pressure rise operation A. In C1 pressure rise operation B, cartridge C1 is in the same state as in Figure 3(a). Therefore, in C1 pressure rise operation B, as in C1 pressure rise operation A, hydrogen gas is supplied from cartridge C1 to the main hydrogen supply pipe 26, and the pressure P1 inside cartridge C1 rises. In step S14, the control device 90 determines whether the pressure P1 inside cartridge C1 exceeds 210 kPa. The control device 90 continues C1 pressure rise operation B by repeating steps S12 and S14 until the pressure P1 exceeds 210 kPa. If the pressure P1 inside cartridge C1 exceeds 210 kPa while C1 pressure increase operation B is being performed, the control device 90 determines YES in step S14 and restarts the C2 purge operation in step S6. The control device 90 also stops counting the execution time of the C2 purge operation while C1 pressure increase operation B is being performed (i.e., while the C2 purge operation is stopped).

[0046] If the execution time of the C2 purge operation exceeds the reference time, the control device 90 determines YES in step S10 and executes the C2 pressure increase operation in step S16. The C2 pressure increase operation is an operation that increases the pressure P2 inside cartridge C2. Here, the control device 90 controls the valves as follows. When switching each valve, the control device 90 first stops the pump 50, then switches each valve, and then operates the pump 50. Valve VH1: Open Valve VW1: Closed Valve VO1: Closed Valve VH2: Closed Valve VW2: Open Valve VO2: Closed

[0047] Figure 3(c) shows the state of each part during the C2 pressure increase operation. Since valve VW1 is closed, water injection into cartridge C1 is stopped. Also, since valve VW2 is open, water delivered by pump 50 is injected into cartridge C2. As a result, hydrogen gas is generated inside cartridge C2. Since valve VH2 and purge valve VO2 are closed, the hydrogen gas generated inside cartridge C2 is not released to the outside of cartridge C2. As a result, the pressure P2 inside cartridge C2 increases.

[0048] Furthermore, during the C2 pressure increase operation, the pressure inside cartridge C1 is high and valve VH1 is open, so hydrogen gas flows from cartridge C1 to the main hydrogen supply pipe 26 as shown in Figure 3(c). In this way, the supply of hydrogen gas from cartridge C1 to the main hydrogen supply pipe 26 continues during the C2 pressure increase operation. Note that since water injection into cartridge C1 is stopped, the pressure P1 inside cartridge C1 gradually decreases during the C2 pressure increase operation.

[0049] In step S18, the control device 90 determines whether the pressure P1 in cartridge C1 is higher than 190 kPa. Also, in step S20, the control device 90 determines whether the pressure P2 in cartridge C2 is higher than 210 kPa. As long as pressure P1 is higher than 190 kPa and pressure P2 is 210 kPa or less, the control device 90 repeats steps S16, S18, and S20 to continue the C2 pressure increase operation. If the pressure P1 in cartridge C1 drops to 190 kPa or less during the C2 pressure increase operation, the control device 90 determines NO in step S18 and executes the C1 pressure increase operation C in step S22.

[0050] The C1 pressure increase operation C is an operation that increases the pressure P1 inside cartridge C1. Here, the control device 90 controls the valves as follows. When switching each valve, the control device 90 first stops the pump 50, then switches each valve, and then operates the pump 50. Valve VH1: Open Valve VW1: Open Valve VO1: Closed Valve VH2: Closed Valve VW2: Closed Valve VO2: Closed

[0051] In C1 pressure rise operation C, all valves VH1, VW1, VO1, VH2, VW2, and VO2 are controlled in the same way as in C1 pressure rise operation A (i.e., Figure 3(a)). Therefore, in C1 pressure rise operation C, as with C1 pressure rise operation A, hydrogen gas is supplied from cartridge C1 to the main hydrogen supply pipe 26, and the pressure P1 inside cartridge C1 rises. Also, in C1 pressure rise operation C, all valves VH2, VW2, and VO2 provided in cartridge C2 are closed, so the pressure P2 inside cartridge C2 is maintained at a constant value. In step S24, the control device 90 determines whether the pressure P1 inside cartridge C1 exceeds 210 kPa. The control device 90 continues C1 pressure rise operation C by repeating steps S22 and S24 until the pressure P1 exceeds 210 kPa. If the pressure P1 in cartridge C1 exceeds 210 kPa during the execution of the C1 pressure increase operation C, the control device 90 determines YES in step S24 and restarts the C2 pressure increase operation in step S16.

[0052] If the pressure P2 inside cartridge C2 exceeds 210 kPa during the C2 pressure increase operation, the control device 90 determines YES in step S20 and executes the second operation (i.e., the operation of supplying hydrogen gas from cartridge C2 to the external device 99) in step S26. Here, the control device 90 controls the valves as follows. Note that in step S26, the water supply valves VW1 and VW2 are not switched, so it is not necessary to stop the pump 50 temporarily. Valve VH1: Closed Valve VW1: Closed Valve VO1: Closed Valve VH2: Open Valve VW2: Open Valve VO2: Closed

[0053] Figure 3(d) shows the state of each part during the second operation. Since valve VW2 is open, water delivered by pump 50 is injected into cartridge C2. Also, as valve VH1 closes and valve VH2 opens, the supply of hydrogen gas from cartridge C1 to the main hydrogen supply pipe 26 stops, and instead, the supply of hydrogen gas from cartridge C2 to the main hydrogen supply pipe 26 begins. Since the pressure P2 inside cartridge C2 is raised to an appropriate value during the C2 pressure rise operation, hydrogen gas is properly supplied from cartridge C2 to the main hydrogen supply pipe 26. In the second operation, the control device 90 intermittently operates pump 50 so that the pressure P2 inside cartridge C2 reaches an appropriate value.

[0054] As explained above, the process shown in Figure 4 completes the switch from the first operation of supplying hydrogen gas from cartridge C1 to the external device 99 to the second operation of supplying hydrogen gas from cartridge C2 to the external device 99. During the switching process (i.e., from step S2 to step S24), the valve VH1 is open, so the supply of hydrogen gas from cartridge C1 to the main hydrogen supply pipe 26 is maintained. Therefore, the switching process can be performed without interrupting the supply of hydrogen gas to the external device 99.

[0055] Furthermore, if the pressure P1 inside cartridge C1 decreases during the switching process, the valve VH1 is kept open during C1 pressure increase operation B and C1 pressure increase operation C while the pressure P1 inside cartridge C1 is increased. This ensures that the supply of hydrogen gas from cartridge C1 to the main hydrogen supply pipe 26 is reliably maintained during the switching process. [Examples]

[0056] The hydrogen generator 100 of Example 2 shown in Figure 5 differs from the hydrogen generator 10 of Example 1 in the following respects.

[0057] The hydrogen generator 100 of Example 2 has a fuel cell 70. The fuel cell 70 supplies power to the control device 90, pump 50, fan 31, and various solenoid valves. The fuel cell 70 is located adjacent to the condenser 30. When the fan 31 rotates, an airflow F is generated. The fuel cell 70 is located upstream of the condenser 30 in the path of the airflow F. Therefore, when the fan 31 rotates, the airflow F is introduced into the fuel cell 70, and the airflow F that has passed through the fuel cell 70 is introduced into the condenser 30. The hydrogen gas flowing through the internal flow path of the condenser 30 is cooled by the airflow F.

[0058] The hydrogen generator 100 of Example 2 has a fuel cell hydrogen supply pipe 72. The upstream end of the fuel cell hydrogen supply pipe 72 is connected to the main hydrogen supply pipe 26 between the valve 36 and the regulator 34. The downstream end of the fuel cell hydrogen supply pipe 72 is connected to the fuel cell 70. A valve 73 is provided in the fuel cell hydrogen supply pipe 72. The valve 73 is a solenoid valve that opens and closes the fuel cell hydrogen supply pipe 72. One end of a discharge pipe 74 is connected to the fuel cell hydrogen supply pipe 72 between the valve 73 and the fuel cell 70. A check valve is provided at the other end of the discharge pipe 74. A manual valve 75 is provided in the discharge pipe 74. The manual valve 75 is a valve that is operated manually by the user and opens and closes the discharge pipe 74.

[0059] The hydrogen generator 100 of Embodiment 2 has a bypass pipe 76 connecting the cartridge C1 and the fuel cell 70. The upstream end of the bypass pipe 76 is connected to the cartridge C1 via a purge pipe 23 and a first hydrogen supply pipe 21. The downstream end of the bypass pipe 76 is connected to the fuel cell 70. The bypass pipe 76 is connected to the fuel cell hydrogen supply pipe 72 via the internal flow path of the fuel cell 70. A manual valve 77 is provided in the bypass pipe 76. The manual valve 77 is a valve operated manually by the user to open and close the bypass pipe 76. When the manual valve 77 is open, hydrogen gas flows from the cartridge C1 to the fuel cell 70 through the bypass pipe 76, bypassing the solenoid valve VH1. One end of the discharge pipe 78 is connected to the bypass pipe 76 between the manual valve 77 and the fuel cell 70. A check valve is provided at the other end of the discharge pipe 78. A valve 79 is provided in the discharge pipe 78. The valve 79 is a solenoid valve that opens and closes the discharge pipe 78.

[0060] The hydrogen generator 100 of Example 2 has water supply pipes 80a, 80b, and 88. The upstream end of water supply pipe 88 is connected to the portion of water supply pipe 54 downstream of the pump 50. The downstream end of water supply pipe 88 is connected to the upstream end of water supply pipe 80a and the upstream end of water supply pipe 80b. The downstream end of water supply pipe 80a is connected to cartridge C1 via branch pipe 54a. Water supply pipe 80a is provided with a manual valve 84. The manual valve 84 is a valve operated manually by the user to open and close water supply pipe 80a. The downstream end of water supply pipe 80b is connected to cartridge C2 via branch pipe 54b. Water supply pipe 80b is provided with a manual valve 86. The manual valve 86 is a valve operated manually by the user to open and close water supply pipe 80b.

[0061] The hydrogen generator 100 of Example 2 has a starting power supply 92. The starting power supply 92 is a power source that operates without an external power supply. As the starting power supply 92, for example, a secondary battery, a dry cell battery, a manual generator (e.g., a hand-cranked generator), a solar power generator, etc. can be used.

[0062] Except for the points described above, the hydrogen generator 100 of Example 2 is the same as the hydrogen generator 10 of Example 1.

[0063] In the hydrogen generator 100 of Example 2, the first operation is performed with the manual valves 75, 77, 84, and 86 closed. In the first operation of Example 2, valves VH1, VW1, VO1, VH2, VW2, VO2, 36 and pump 50 are controlled, similar to the first operation of Example 1. As a result, hydrogen gas is supplied from cartridge C1 to the main hydrogen supply pipe 26, similar to Figure 3(a). The hydrogen gas passes sequentially through the condenser 30, gas-liquid separator 32, regulator 34, and valve 36 along the main hydrogen supply pipe 26 and is supplied to the external device 99. In addition, in the first operation of Example 2, the control device 90 opens valves 73 and 79. As a result, a portion of the hydrogen gas that has passed through the condenser 30, gas-liquid separator 32, and regulator 34 is supplied from the main hydrogen supply pipe 26 to the fuel cell 70 via the fuel cell hydrogen supply pipe 72. The hydrogen gas that has passed through the fuel cell 70 is discharged to the outside via the discharge pipe 78. In the first operation, the control device 90 rotates the fan 31, so that an airflow F is introduced into the fuel cell 70. The fuel cell 70 generates electricity by reacting the air introduced by the fan 31 with hydrogen gas supplied from the fuel cell hydrogen supply pipe 72. The fuel cell 70 supplies the electricity generated to the control device 90, the pump 50, and each solenoid valve, etc.

[0064] As described above, in the first operation of Example 2, the hydrogen generator 100 uses a portion of the generated hydrogen gas to generate electricity using the fuel cell 70, and supplies the electricity obtained from the power generation to various parts of the hydrogen generator 100. Similarly, in the second operation, the hydrogen generator 100 uses a portion of the generated hydrogen gas to generate electricity using the fuel cell 70, and supplies the electricity obtained from the power generation to various parts of the hydrogen generator 100. Therefore, the hydrogen generator 100 of Example 2 can perform the first and second operations without receiving power from an external source. Furthermore, since air is introduced into the fuel cell 70 by the airflow F generated by the cooling fan 31 of the condenser 30, a dedicated device for introducing air into the fuel cell 70 is unnecessary. This enables miniaturization of the hydrogen generator 100 and a reduction in the number of parts.

[0065] When the hydrogen generator 100 is started, the fuel cell 70 is not generating electricity, so it cannot supply power from the fuel cell 70 to the control device 90, pump 50, etc. Therefore, during startup, a startup process is performed to supply power from the startup power supply 92 to the control device 90, pump 50, etc. The startup process of the hydrogen generator 100 in Example 2 will be described below.

[0066] Figure 6 shows the startup process of the hydrogen generator 100 in Example 2. Before the start of the startup process (i.e., while the hydrogen generator 100 is stopped), the solenoid valves VH1, VW1, VO1, VH2, VW2, VO2, 36, 73, 79 and manual valves 75, 77, 84, 86 are closed. In step S30, the user opens manual valves 75, 77, and 84. Furthermore, in step S32, the user turns on the power switch of the hydrogen generator 100. Power is then supplied from the startup power supply 92 to the control device 90, and in step S34, the control device 90 starts up. Then, in step S36, the control device 90 supplies power from the startup power supply 92 to the pump 50, and operates the pump 50. Since manual valve 84 is open, when the pump 50 operates, water is supplied from the water tank 56 to the cartridge C1 via the water supply pipes 54, 88, and 80a. As a result, hydrogen gas is generated in the cartridge C1. With manual valves 75 and 77 open, hydrogen gas is supplied from cartridge C1 to fuel cell 70 via bypass pipe 76. The hydrogen gas that has passed through fuel cell 70 is discharged to the outside through discharge pipe 74. Fuel cell 70 generates electricity by reacting the hydrogen gas supplied from bypass pipe 76 with the air inside.

[0067] In step S38, the control device 90 determines whether the output voltage of the fuel cell 70 has reached the reference voltage. The control device 90 repeats the determination in step S38 as long as the output voltage of the fuel cell 70 is below the reference voltage. When the output voltage of the fuel cell 70 exceeds the reference voltage, the control device 90 executes step S40.

[0068] In step S40, the control device 90 supplies the power generated by the fuel cell 70 to the control device 90 and the pump 50. In other words, the power supply source is switched from the starting power supply 92 to the fuel cell 70. From step S40 onward, the hydrogen generator 100 operates using the power generated by the fuel cell 70.

[0069] In step S42, the control device 90 controls the valve as follows: Valve VH1: Open Valve VW1: Open Valve VO1: Closed Valve VH2: Closed Valve VW2: Closed Valve VO2: Closed Valve 36: Closed Valve 73: Open Valve 79: Open Although switching the solenoid valves requires relatively high power, the high output voltage of the fuel cell 70 allows for proper switching of the solenoid valves. After the valves are controlled as described above, the user closes the manual valves 75, 77, and 84 in step S44.

[0070] When the valves are switched in steps S42 and S44, water is supplied from the pump 50 to the cartridge C1 via valve VW1. Also, since valve VH1 is open, hydrogen gas generated in cartridge C1 is supplied to the fuel cell 70 via the first hydrogen supply pipe 21, the main hydrogen supply pipe 26, and the fuel cell hydrogen supply pipe 72. The hydrogen gas that has passed through the fuel cell 70 is discharged to the outside through the discharge pipe 78. In step S46, the control device 90 determines whether the pressure P1 in cartridge C1 has reached 190 kPa. The control device 90 repeats the determination in step S46 as long as the pressure P1 is 190 kPa or less. When the pressure P1 exceeds 190 kPa, the control device 90 executes step S48.

[0071] In step S48, the control device 90 activates the fan 31. This introduces an airflow F into the fuel cell 70, enabling the fuel cell 70 to generate electricity continuously for a long period of time. Next, in step S49, the control device 90 opens the valve 36. Opening the valve 36 initiates the first operation. This supplies hydrogen gas to the external device 99.

[0072] As explained above, this startup process allows the hydrogen generator 100 to be started properly. [Examples]

[0073] The hydrogen generator 200 of Example 3 shown in Figure 7 differs from the hydrogen generator 100 of Example 2 in the following respects.

[0074] The hydrogen generator 200 of Example 3 does not have a starting power supply 92 (see Figure 5). Instead, the hydrogen generator 200 of Example 3 has a manual pump 82 and a water supply pipe 80. The upstream end of the water supply pipe 80 is connected to a water tank 56 via a water supply pipe 54. The downstream end of the water supply pipe 80 is connected to the upstream end of water supply pipe 80a and the upstream end of water supply pipe 80b. The manual pump 82 is provided in the water supply pipe 80. The manual pump 82 is a pump that is operated manually by the user (e.g., a rubber bulb pump, a hand pump, etc.). The manual pump 82 pumps water in the water supply pipe 80 downstream.

[0075] Except for the points described above, the hydrogen generator 200 of Example 3 is the same as the hydrogen generator 100 of Example 2.

[0076] The hydrogen generator 200 of Example 3 performs the first and second operations in the same manner as the hydrogen generator 100 of Example 2. That is, in the first and second operations of Example 3, the hydrogen generator 200 supplies hydrogen gas to the external device 99, uses a portion of the generated hydrogen gas to generate electricity using the fuel cell 70, and supplies the electricity obtained from the power generation to each part of the hydrogen generator 200. For this reason, the hydrogen generator 200 of Example 3 can perform the first and second operations without receiving power from an external source.

[0077] When starting up the hydrogen generator 200 in Example 3, the fuel cell 70 is not generating electricity, so a startup process is required to supply power to the control device 90, pump 50, etc. The startup process for the hydrogen generator 200 in Example 3 will be described below.

[0078] Figure 8 shows the startup process of the hydrogen generator 200 in Example 3. Before the start of the startup process (i.e., while the hydrogen generator 200 is stopped), the solenoid valves VH1, VW1, VO1, VH2, VW2, VO2, 36, 73, 79 and manual valves 75, 77, 84, 86 are closed. In step S50, the user turns on the power switch of the hydrogen generator 200. Furthermore, in step S52, the user opens the manual valves 75, 77, 84. Next, in step S54, the user manually operates the manual pump 82. Since the manual valve 84 is open, when the manual pump 82 is operated, water is supplied from the water tank 56 to the cartridge C1 via the water supply pipes 80, 80a. As a result, hydrogen gas is generated in the cartridge C1. Since the manual valves 75, 77 are open, hydrogen gas is supplied from the cartridge C1 to the fuel cell 70 via the bypass pipe 76. The hydrogen gas that has passed through the fuel cell 70 is discharged to the outside through the discharge pipe 74. The fuel cell 70 generates electricity by reacting the hydrogen gas supplied from the bypass pipe 76 with the air inside. The fuel cell 70 supplies the electricity generated to the control device 90. For this reason, in step S56, the control device 90 is started up.

[0079] After startup, the control device 90 displays on an indicator (not shown) that the manual pump 82 may be stopped. Therefore, the user stops the manual pump in step S58. Also, in step S60, the control device 90 supplies power generated by the fuel cell 70 to the pump 50 to operate it. Then, water is supplied from the pump 50 to the cartridge C1 via the water supply pipes 88 and 80a. In this way, in steps S58 and S60, the pump used is switched from the manual pump 82 to the pump 50. As a result, the amount of hydrogen gas generated in the cartridge C1 increases, and the amount of hydrogen gas supplied to the fuel cell 70 increases. Therefore, the output voltage of the fuel cell 70 rises. In step S62, the control device 90 determines whether the output voltage of the fuel cell 70 has reached the reference voltage. The control device 90 repeats the determination in step S62 as long as the output voltage of the fuel cell 70 is below the reference voltage. When the output voltage of the fuel cell 70 exceeds the reference voltage, the control device 90 executes step S64.

[0080] In step S64, the control device 90 controls the valve as follows: Valve VH1: Open Valve VW1: Open Valve VO1: Closed Valve VH2: Closed Valve VW2: Closed Valve VO2: Closed Valve 36: Closed Valve 73: Open Valve 79: Open Although switching the solenoid valves requires relatively high power, the high output voltage of the fuel cell 70 allows for proper switching of the solenoid valves. After the valves are controlled as described above, the user closes the manual valves 75, 77, and 84 in step S66.

[0081] When each valve is controlled in this manner, water is supplied from the pump 50 to the cartridge C1 via valve VW1. Also, since valve VH1 is open, hydrogen gas generated in cartridge C1 is supplied to the fuel cell 70 via the first hydrogen supply pipe 21, the main hydrogen supply pipe 26, and the fuel cell hydrogen supply pipe 72. The hydrogen gas that has passed through the fuel cell 70 is discharged to the outside through the discharge pipe 78. In step S68, the control device 90 determines whether the pressure P1 in cartridge C1 has reached 190 kPa. The control device 90 repeats the determination in step S68 as long as the pressure P1 is 190 kPa or less. When the pressure P1 exceeds 190 kPa, the control device 90 executes step S70.

[0082] In step S70, the control device 90 activates the fan 31. This introduces an airflow F into the fuel cell 70, enabling the fuel cell 70 to generate electricity continuously for a long period of time. Next, in step S72, the control device 90 opens the valve 36. Opening the valve 36 initiates the first operation. This supplies hydrogen gas to the external device 99.

[0083] As explained above, this startup process allows the hydrogen generator 200 to be started properly.

[0084] In Examples 2 and 3, the only cartridge that can be attached to the hydrogen generator may be cartridge C1.

[0085] In addition, in Examples 2 and 3, the fuel cell 70 may be arranged as shown in Figure 9. In Figure 9, the fuel cell 70 is located upstream of the condenser 30 in the path of the airflow F. Also, in Figure 9, the fuel cell 70 faces the portion of the hydrogen gas path within the condenser 30 that is upstream of the central portion 30c (hereinafter referred to as the upstream portion 30a). The fuel cell 70 is not located in a position facing the portion of the condenser 30 that is downstream of the central portion 30c (hereinafter referred to as the downstream portion 30b). Heat is generated in the fuel cell 70, so the airflow Fa is heated by the fuel cell 70. On the other hand, the temperature of the hydrogen gas flowing in the upstream portion 30a of the condenser 30 is higher than the temperature of the hydrogen gas flowing in the downstream portion 30b of the condenser 30. In the configuration of Figure 9, the airflow Fa heated by the fuel cell 70 is introduced into the upstream portion 30a of the condenser 30. Since the temperature of the hydrogen gas in the upstream section 30a is high, the airflow Fa heated by the fuel cell 70 can also cool the hydrogen gas in the upstream section 30a. Furthermore, in this configuration, the airflow Fb, which is not heated by the fuel cell 70, is introduced into the downstream section 30b of the condenser 30, so the low-temperature hydrogen gas in the downstream section 30b can be appropriately cooled by the airflow Fb. Thus, according to the configuration in Figure 9, the hydrogen gas in the condenser 30 can be appropriately cooled.

[0086] In addition, in Examples 2 and 3, the fuel cell 70 may be arranged as shown in Figure 10. In Figure 10, the fuel cell 70 is located downstream of the condenser 30 in the path of the airflow F. Also in Figure 10, the fuel cell 70 faces the downstream portion 30b of the condenser 30. The fuel cell 70 is not located in a position facing the upstream portion 30a of the condenser 30. The temperature of the airflow Fc that has passed through the upstream portion 30a of the condenser 30 is higher than the temperature of the airflow Fd that has passed through the downstream portion 30b of the condenser 30. In the configuration of Figure 10, the relatively low temperature airflow Fd that has passed through the downstream portion 30b is introduced into the fuel cell 70, so the temperature rise of the fuel cell 70 can be suppressed.

[0087] The main hydrogen supply pipe 26 downstream of the condenser 30 in Examples 2 and 3 is an example of a hydrogen supply path that supplies hydrogen gas that has passed through the condenser to an external device. The main hydrogen supply pipe 26 and the first hydrogen supply pipe 21 upstream of the condenser 30 in Examples 2 and 3 are an example of a first flow path that supplies hydrogen gas from the cartridge to the condenser. The valve VH1 in Examples 2 and 3 is an example of a solenoid valve that opens and closes the first flow path. The bypass pipe 76 in Examples 2 and 3 is an example of a second flow path that supplies hydrogen gas from the cartridge to the fuel cell, bypassing the solenoid valve.

[0088] Although embodiments have been described in detail above, these are merely illustrative and do not limit the scope of the claims. The technologies described in the claims include various modifications and changes to the specific examples illustrated above. The technical elements described in this specification or drawings exhibit technical usefulness individually or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Furthermore, the technologies illustrated in this specification or drawings achieve multiple objectives simultaneously, and achieving even one of these objectives constitutes technical usefulness. [Explanation of Symbols]

[0089] 10: Hydrogen generator, 26: Main hydrogen supply pipe, 30: Condenser, 32: Gas-liquid separator, 50: Pump, 56: Water tank

Claims

1. A hydrogen generator, A first mounting section and a second mounting section to which a cartridge containing a substance that reacts with water to generate hydrogen gas is attached, A water supply device that supplies water to a first cartridge attached to the first mounting part and a second cartridge attached to the second mounting part, The main hydrogen supply line that supplies hydrogen gas to external equipment, A first hydrogen supply channel that supplies hydrogen gas from the first cartridge to the main hydrogen supply channel, A second hydrogen supply channel that supplies hydrogen gas from the second cartridge to the main hydrogen supply channel, A first hydrogen supply valve that opens and closes the first hydrogen supply path, A second hydrogen supply valve that opens and closes the second hydrogen supply passage, A purge valve that opens and closes a passage that opens the second cartridge to the outside air, The water supply device, the first hydrogen supply valve, the second hydrogen supply valve, and the control device for controlling the purge valve, It has, When the water supply device is controlled to stop supplying water to the second cartridge and to supply water to the first cartridge, and the first hydrogen supply valve is opened to supply hydrogen gas from the first cartridge to the main hydrogen supply path, the control device switches the hydrogen supply source from the first cartridge to the second cartridge, A first process that increases the amount of water supplied to the first cartridge by the water supply device to raise the pressure inside the first cartridge, After the first process, the water supply device is controlled to stop supplying water to the first cartridge and start supplying water to the second cartridge, the first hydrogen supply valve is opened to supply hydrogen from the first cartridge to the main hydrogen supply path, the second hydrogen supply valve is closed and the purge valve is opened to purge the second cartridge, and the second process is performed. After the second process, the water supply device is controlled to stop supplying water to the first cartridge and start supplying water to the second cartridge, the first hydrogen supply valve is opened to supply hydrogen from the first cartridge to the main hydrogen supply path, and the second hydrogen supply valve and the purge valve are closed to increase the pressure inside the second cartridge. After the third process, a fourth process is performed in which the first hydrogen supply valve is closed and the second hydrogen supply valve is opened to supply hydrogen from the second cartridge to the main hydrogen supply path. Execute Hydrogen generator.

2. The hydrogen generator according to claim 1, wherein when the pressure in the first cartridge falls below a reference value during the execution of at least one of the second and third processes, the control device performs a fifth process to increase the pressure in the first cartridge by controlling the water supply device to stop supplying water to the second cartridge and to supply water to the first cartridge while maintaining the first hydrogen supply valve in an open state, and then returns to the original process.

3. A hydrogen generator, A mounting section to which a cartridge containing a substance that reacts with water to generate hydrogen gas is attached, A fan that generates airflow, A condenser having an internal passage through which hydrogen gas supplied from the cartridge attached to the mounting portion flows, and which condenses the water vapor in the hydrogen gas in the internal passage by cooling the hydrogen gas in the internal passage with the airflow generated by the fan, A hydrogen supply path that supplies hydrogen gas that has passed through the condenser to an external device, A fuel cell that generates electricity by reacting hydrogen gas that has passed through the condenser with air supplied by the fan, A hydrogen generator having the following features.

4. The fuel cell is positioned upstream of the condenser in the path of the airflow generated by the fan. The fuel cell is positioned opposite the condenser in the portion of the hydrogen gas path within the condenser that is upstream of the central portion. The hydrogen generator according to claim 3.

5. The fuel cell is positioned downstream of the condenser in the path of the airflow generated by the fan, The fuel cell is positioned opposite the condenser in the portion of the hydrogen gas path within the condenser that is downstream of the central part. The hydrogen generator according to claim 3.

6. An electric pump for supplying water to the aforementioned cartridge, Control device and power supply for startup, It further possesses, When the hydrogen generator is started, a first startup process is performed in which the control device is started using the power of the startup power supply, power is supplied from the startup power supply to the electric pump, water is supplied from the electric pump to the cartridge, hydrogen gas is supplied from the cartridge to the fuel cell, and power is generated by the fuel cell. After the first startup process, the control device performs a second startup process in which it supplies power from the fuel cell to the control device and the electric pump. A hydrogen generator according to any one of claims 3 to 5.

7. A first channel for supplying hydrogen gas from the cartridge to the condenser, A solenoid valve that opens and closes the first flow path, A second channel that supplies hydrogen gas from the cartridge to the fuel cell, bypassing the solenoid valve. It further possesses, In the first startup process, hydrogen gas is supplied from the cartridge to the fuel cell via the second flow path. In the second startup process, the control device opens the solenoid valve, and hydrogen gas is supplied from the cartridge to the fuel cell via the first flow path. The hydrogen generator according to claim 6.

8. An electric pump for supplying water to the aforementioned cartridge, A manual pump for supplying water to the aforementioned cartridge, control device, It further possesses, When the hydrogen generator is started, a first startup process is performed in which water is supplied from the manual pump to the cartridge, hydrogen gas is supplied from the cartridge to the fuel cell, and the control device is started using the electricity generated by the fuel cell. After the first startup process, the control device performs a second startup process in which it supplies power from the fuel cell to the electric pump. A hydrogen generator according to any one of claims 3 to 5.

9. A first channel for supplying hydrogen gas from the cartridge to the condenser, A solenoid valve that opens and closes the first flow path, A second channel that supplies hydrogen gas from the cartridge to the fuel cell, bypassing the solenoid valve. It further possesses, In the first startup process, hydrogen gas is supplied from the cartridge to the fuel cell via the second flow path. In the second startup process, the control device opens the solenoid valve, and hydrogen gas is supplied from the cartridge to the fuel cell via the first flow path. The hydrogen generator according to claim 8.

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