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2.3.5.2 Airway Pressure Gauge Assembly
The airway pressure gauge assembly is located on the left cover plate assembly of the work
surface and is connected to the circuit through the internal pipeline to display the inspiratory
airway pressure. The core of the pressure gauge is made of purchased materials. The
measurement unit of the pressure gauge is cmH2O. The measurement range is –20 cmH2O to +
100 cmH2O. The accuracy is ±(4% of the full-scale reading + 4% of the actual reading). The
upper and lower housings and glass of the airway pressure gauge are designed by Mindray to
fasten the core and meet the appearance requirements. The structural diagram of the airway
pressure gauge assembly is shown below.
Figure 28 Structural diagram of the airway pressure gauge assembly
2.3.5.3 Auto/Manual Switch Assembly
The auto/manual switch assembly is a device driven by a mechanical structure to generate
electrical signals. An internal bistable structure is used so that the handle can be adjusted to either
the left or right position, to turn on or off the limit switch. After reading the status signal fed back
by the limit switch, the system controls the auto/manual switch assembly to enter the
corresponding working state, and switches the system operating mode to auto or manual.
The auto/manual switch assembly consists of the drive handle, bistable limit structure, reset
spring, limit switch, and drive shaft. The structural diagram of the auto/manual switch assembly
is shown below.
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