Title:
THERMISTOR FLOW SENSOR HAVING MULTIPLE TEMPERATURE POINTS
Document Type and Number:
WIPO Patent Application WO/2018/052320
Kind Code:
A3
Abstract:
A gases flow rate sensing system may be configured to operate in at least two different target temperature modes, based upon a measured temperature of the gases flow. In some embodiments, the gases flow sensing system may have a voltage divider containing a thermistor. The gases flow rate may be determined based upon a voltage output indicating an amount of power needed to maintain the thermistor at a target temperature as specified by the target temperature mode, and a measured temperature of the gases flow.
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Inventors:
BURGESS RUSSEL WILLIAM (NZ)
HUANG HOUDE (NZ)
HUANG HOUDE (NZ)
Application Number:
PCT/NZ2017/050119
Publication Date:
May 17, 2018
Filing Date:
September 13, 2017
Export Citation:
Assignee:
FISHER & PAYKEL HEALTHCARE LTD (NZ)
International Classes:
A61M16/06
Domestic Patent References:
| WO2009129506A1 | 2009-10-22 |
Foreign References:
| EP2055338B1 | 2010-02-17 | |||
| US20140116433A1 | 2014-05-01 | |||
| US20090306529A1 | 2009-12-10 |
Other References:
See also references of EP 3512586A4
Attorney, Agent or Firm:
BALDWINS INTELLECTUAL PROPERTY (NZ)
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