7
7.3 Function description
Vacuum sterilizer divided into the following process: preheating process;the
vacuum step-up process; sterilization process; exhaust drying process; the
pressure balance process.
7.3.1 preheating process:
Select the program firstly, then close the door, press start button to enter the
preheating process,electrify heated steam generator heater reaches 100
℃,
electrify heated the chamber wall heater to set temperature 50
℃.
7.3.2 vacuum process:
Chamber wall temperature to 50
℃, when the steam generator temperature
reaches 100
℃, into the vacuum heating process, open the vacuum selection valve,
exhaust valve (normally on) and start the vacuum pump, 300 seconds later Close
the vacuum selection valve, exhaust valve (normally on) and the vacuum pump to
stop pumping the vacuum. Pot inlet valve intermittent pumping power, as steam
generator to generate steam. If the system is set up one pre-vacuum, the pressure
rise to +50 kPa until the pot stops pumping, open the drain valve to drain the
exhaust 0.0kPa to close drain valve, intermittent steam generator to pump water to
generate steam, when the pot the temperature reaches the set value, the end of the
vacuum and transferred to sterilized itinerary. If the system is set three times
pre-vacuum, then when the pressure inside the chamber rise to +50kPa ,end the
first pulse. Start the pump again, begin the second pre-vacuum process.
7.3.3 Sterilization process:
This trip is insulation packing process, when the pot temperature dropped to the
set sterilization temperature of +0.5
℃ , the pump starts pumping water to the
steam generator, the pot temperature rise to the set sterilization temperature of
+0.9
℃ ,open the exhaust exhaust valve, allowing the pot temperature is kept
between the set sterilization tempe0.3
℃ to the set sterilization
tempe0.9
℃.
7.3.4 Exhaust drying process:
When the sterilization time, reduced to zero, into the exhaust stroke dry, open the
drain valve to drain the pressure reduced to +0.0then the vacuum pump to start.
When the drying time only 3 minutes ,open the intake valve to vacuum drying.
7.3.5 Pressure equilibrium process:
