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Outer MantleThe lower part of the outer mantle 
is a cylinder with a solid bottom. The walls are
partly
double. The
intake air
flows into
the
combustion
chamber
between the
two walls.
With this
construction
the waste
heat
generated
in the
process is
made to
heat the
intake air to
improve the
overall
efficiency.
The
generated
gas passes
into the
filter from
the upper end of the lower part (3) where there is only single wall. The combustion air
is taken in through the one way flap valve (2) and it is led around the generator through
the air channel and further to the air channel of the combustion chamber at the point of
the ignition opening (6).
The air channel of the combustion chamber and the air channel of the outer mantle are
connected together with a flange connection. The ignition opening is quite large to make
it possible to tighten the bolts of the flange connection through it. In the lower part there
is also a cleaning opening (5) which is led gas tight into the lower part through the air
channel. This opening is covered with tightly closed cap. The gasket of the cap can be
made of asbestos string treated with graphite. The upper part of the outer mantle is
connected to the lower part with a flange with bolts (M8) mounted upwards. In the lower
part there is also operating shaft for the hearth moving mechanism. The shaft goes
through the wall and in the opening there is a seal made of asbestos string.
The one way flap (2) is an oval steel plate fitted in the pipe with an axle connected to the
upper part. It opens inwards and closes automatically. The flap prevents air from
entering the generator and produced gas from exiting the generator when not in use.
- 1000W => 1 min
- 100W => 15 min
Translated by Olli.
