초록 ▼

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

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.

대표청구항 ▼

Having described the invention, what is claimed is: 1. A method of controlling the heating of a breathable gas to be supplied to a patient in which a PID feedback control having a set of coefficients is used comprising:heating water in a chamber;passing the breathable gas through the chamber to heat

Having described the invention, what is claimed is: 1. A method of controlling the heating of a breathable gas to be supplied to a patient in which a PID feedback control having a set of coefficients is used comprising:heating water in a chamber;passing the breathable gas through the chamber to heat the breathable gas; andadjusting the coefficients based on a heat differential between the heat input to the water and the heat output from the chamber in relation to a temperature set point.