Determination device

A determination device comprising:

• a pressure detecting unit configured to detect pressure in a storage that stores gas discharged from inside an absorption refrigerator;
• a hydrogen detecting unit configured to detect an amount of hydrogen discharged from the storage;
• and
• a determining unit configured to determine whether a dominant cause of a pressure rise in the storage is a generation of hydrogen or an inleak of an outside air based on a detection result of the hydrogen detecting unit and a detection result of the pressure detecting unit,
• wherein the hydrogen detecting unit is provided at a gas extraction device, the gas extraction device including a palladium tube that penetrates through the storage and a heating unit that heats the palladium tube,
• the palladium tube has apertures arranged on both ends in a longitudinal direction of the palladium tube, and the palladium tube is arranged such that the longitudinal direction is arranged along a vertical direction,
• wherein the palladium tube penetrates through an end portion of the storage such that outside air is introduced into the palladium tube from a lower aperture of the apertures of the palladium tube, and
• wherein, when the palladium tube is heated by the heating unit, an updraft is created in the palladium tube, thereby guiding hydrogen that has entered the palladium tube into a conduit together with outside air that has entered through the lower aperture of the palladium tube, the conduit being disposed on an upper aperture side of the palladium tube.