2-21
2.1.4.4 Others (heating module, fan, lithium battery)
Heating module, fan and lithium battery are also inside the anesthesia machine.
Heating module, drived by power board, offers temperature protection for software and hardware.
The mechanism of heating is: power board heats thermistor up to 90℃ with full power, and then
heats thermistor back to 70℃ with 5W, and then heats thermistor up to 90℃ with full power
again; go round and begin again. The heater is supplied by AC power. If the heater is not
connected to AC power, the heater does not work, and no alarm of heating module failure displays
on the screen of anesthesia machine.
Fans include fan of hardware box and fan of module rack, cooling hardware box and module rack
respectively. Lithium battery supplies the anesthesia machine without the network source, to
ensure that the anesthesia machine can work normally when the network source is disabled or
abnormal.
2.1.5 Display System
Display system includes key control board, screen, touchscreen, alarm light board, encoder board
(including main encoder and EFCS flowmeter encoder, of which only the main encoder is
illustrated here because of their same principle), etc, which realize human-machine interaction.
2.1.5.1 Key Control Adapter Board
Key control board realizes two functions, transferring signals and identification: one is to transfer
the signals of screen backlight drive, alarm light drive, and commnulication of touchscreen series
ports, etc; the other is to realize encoder identification, touchscreen identification and screen
backlight adjustment, etc.
To Next Page
Loading...
