EP-4706722-A3 - CONTROL OF HUMIDIFIER CHAMBER TEMPERATURE FOR ACCURATE HUMIDITY CONTROL
Abstract
A breathing assistance system for delivering a stream of heated, humidified gases to a user, comprising a humidifier unit which holds and heats a volume of water, and which in use receives a flow of gases from a gases source via an inlet port, the flow of gases passing through the humidifier and exiting via an exit port, the system further having a temperature sensor which measures the temperature of the gases exiting the humidifier unit, an ambient temperature sensor which measures the temperature of gases before they enter the humidifier unit, and a flow sensor which measures the flow rate of the gases stream, the system also having a controller which receives data from the temperature and flow sensors, and which determines a control output in response, the control output adjusting the power to the humidifier unit to achieve a desired output at the humidifier unit exit port.
Inventors
- TATKOV, STANISLAV
- CRONE, CHRISTOPHER MALCOLM
- HAWKINS, PETER
- HAN, JAE CHUL
- O'DONNELL, KEVIN PETER
- SOMERVELL, ANDREW ROBERT DONALD
Assignees
- Fisher & Paykel Healthcare Limited
Dates
- Publication Date
- 20260506
- Application Date
- 20090527