Wire heated tube with temperature control system for humidifier for respiratory apparatus

Disclosed is a control system for a heated conduit for use in a respiratory apparatus. The control system comprises a power supply (440) to provide power to the heated conduit, a heating control circuit, and a sensing circuit (428) includes a sensing resistor (426). The heating control circuit is co...

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Bibliographic Details
Main Authors Huby, Ronald James, Tang, Zhuo Ran, Vos, Adrian Ashley
Format Patent
LanguageEnglish
Published 29.06.2018
Subjects
DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
HUMAN NECESSITIES
HYGIENE
MEASURING
MEASURING QUANTITY OF HEAT
MEASURING TEMPERATURE
MEDICAL OR VETERINARY SCIENCE
PHYSICS
TESTING
THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Summary:Disclosed is a control system for a heated conduit for use in a respiratory apparatus. The control system comprises a power supply (440) to provide power to the heated conduit, a heating control circuit, and a sensing circuit (428) includes a sensing resistor (426). The heating control circuit is configured to control heating of the heated conduit to obtain a predetermined temperature. The sensing resistor (426) is configured to provide an output to indicate the temperature of a sensor positioned in the heated conduit. A direction of the voltage drop across the sensing resistor (426) changes when the heating is on compared to when the heating is off.
Bibliography:Application Number: NZ20140727820