Weinmann OXYMAT 3 Servicing And Repair Instructions page 6

The level of oxygen concentration depends on the
Oxygen concentration
set flow and is available within a few minutes.
The waste air is expelled to the rear via a noise
suppressor on the underside of the appliance.
The electronic control with microprocessor consists
of one circuit board. It is housed separately from
the oxygen system on the front panel.
Flow [ l/min ]
The O enrichment process
2
The compressor draws the ambient air into the
housing via a coarse dust filter. Part of this air is
used to cool the compressor assembly. The other
part enters the compressor via the suction filter,
where it is compressed. A cooler reduces the tem-
perature of the air. The compessed and cooled air
is then passed to the O system to enrich the oxygen.
2
The adsorption containers (ADS containers) are
alternately filled with compressed air in fixed
cycles, then regenerated by expanding the
compressed air and flushing with oxygen.
At the end of each enrichment, a pressure of
around 1.7 bar will have built up in the currently
active container.
After 7 seconds, the magnetic valves are alter-
nately triggered by the electronic control and
switch between the two ADS containers.
Of the valves in the two ADS containers, one is
open and the other closed during operation.
Once the changeover time has been reached,
pressure compensation is implemented between
the two ADS containers. During pressure compen-
sation, both valves are open for approximately
1 second.
The actual process of oxygen enrichment takes
place in the ADS containers. A molecular sieve
adsorbs the nitrogen from the air, thereby increas-
ing the proportion of oxygen by volume.
As soon as the pressure in the ADS container has
risen sufficiently, air enriched with oxygen flows
into the oxygen tank at the other end of this con-
tainer via the non-return valve.
6
Functional description