PID coefficient adjustment for respiratory heater closed...

Details PID coefficient adjustment for respiratory heater closed... PID coefficient adjustment for respiratory heater closed...

2011-07-19

2011-07-19

Campbell, Thor S (Department: 3742)

Electric resistance heating devices

Heating devices

Continuous flow type fluid heater

C392S465000

Reexamination Certificate

active

07983542

ABSTRACT:
A heater system is provided for a respiratory system having a PID feedback control in which the coefficients are adjusted, such as in a warm-up process, to correspond to a likely flow rate of gas through a chamber of heated water based on the difference between heat input and heat output in relation to a temperature set point without the need to directly monitor flow rate or humidity level. A steady-state adjustment of the coefficients based on the behavior of the measured temperature in relation to the set point is also disclosed.

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