The present invention provides a metal hydride canister apparatus having
structures capable of discharging hydrogen gas uniformly and exchanging
heat effectively, comprising: a shell having a joint arranged in a
central hole located on top of the shell, and two via holes arranged
respectively at a side of the central hole; a filtering rod connecting to
the joint; a pipe having a first end, a second end and a middle section
between the first end and the second end; and a metal hydride stored
inside the shell; wherein, the first end and the second end of the pipe
pass the corresponding via hole in respective, and the middle section of
the pipe forms a twin spiral structure wrapping around the filtering rod,
the middle section having a first loop interconnecting to a second loop.
In a preferred embodiment of the present invention, the filtering rod can
be a hollow rod extending toward the bottom of the shell, and is welded
on the joint that is further welded to the central hole, in addition, the
first end and the second end of the pipe are welded onto the
corresponding via holes and are exposed to the outside of the shell, and
the first loop and the second loop of the middle section can have equal
diameters or different diameters.