Hydrogen generating device

A hydrogen generating device, comprising:

• a first attachment portion and a second attachment portion to which cartridges are attached, wherein the cartridges contain a substance that generates hydrogen gas when reacting with water;
• a first water supply device configured to supply water to a first cartridge attached to the first attachment portion;
• a second water supply device configured to supply water to a second cartridge attached to the second attachment portion;
• a main hydrogen supply passage for supplying hydrogen gas to outside;
• 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 configured to open and close the first hydrogen supply passage;
• a second hydrogen supply valve configured to open and close the second hydrogen supply passage;
• and
• a controller configured to control the first water supply device, the second water supply device, the first hydrogen supply valve, and the second hydrogen supply valve,
• for switching a hydrogen supply source from the first cartridge to the second cartridge while hydrogen gas is being supplied from the first cartridge to the main hydrogen supply passage by water is being supplied to the first cartridge and the first hydrogen supply valve being opened, the controller performs:
• a first process to supply water to the second cartridge with the second hydrogen supply valve closed while supplying water to the first cartridge and keeping the first hydrogen supply valve opened, and
• a second process to open the second hydrogen supply valve to supply hydrogen gas from the second cartridge to the main hydrogen supply passage and close the first hydrogen supply valve after the first process.