Dräger Medical Oxylog 1000, Technical Documentation Manual

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Oxylog 1000 Function Description
3.2 Frequency Control
When the unit is off, driving gas flows via the manifold
and through the dosage valve D2 to the 3/2-way valve DMR5 and to
DMR6. In consequence, DMR6 switches through and the switching valve
WV1 switches to expiration. At the same time DMR1 is switched; DMR2 is
vented via the volume V1 and DMR1.
If the switch S1 is switched, the gas flows via the manifold
to D5, the frequency control valve FD1, and to DMR1 and 4. DMR4
fills V2, and DMR5 is switched with a delay; this vents DMR6, 4 and 1. At the
same time, DMR3 is switched over via D1 and DMR2, and WV1 switches to
inspiration. Vent valve EV is closed via DMR18.
Figure 4 Segment of the flow chart: Frequency Control
During the inspiration phase, the supply gas flows through the switching
valve (WV1 - see illustration above), the minute volume control valve (MV),
the injector (I), the patient connection port (PA), the hose system (S) and the
ventilation valve (BV) to the patient.
During expiration, the vent valve (EV) is open to the atmosphere, so that
pressure is relieved from the hose system (S) and the ventilation valve (BV);
the patient can breathe out through the expiration branch of the ventilation
valve (BV) to atmosphere.
DMR1
DMR4
FD1
DMR2
DMR3
D1
V1
V2
WV1
S1
D5
MV
I
PA
BV
S
EV
Manifold
D2
DMR5
DMR6
I
0
Manifold
DMR18