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US 12,156,969 B2Granted
Respiratory gas humidifier
AssigneeFisher & Paykel Healthcare Limited
InventorsIgor Olegovich Yatsevich, Andrew John Partington, Nordyn Alami
Life of this patent
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Abstract
A gas humidifier can have a gas channel comprising an inlet and an outlet. A portion of the gas channel can have a region having a reduction in cross-sectional area relative to the portions of the gas channel outside of the region. A water conduit can extend from the region to a water reservoir. A heating element can heat water entering the region from the water conduit. Water vaporized using the heating element can join the flow of gases passing through the gas channel in use.
Claims14
A gas humidifier comprising:
- a gases inlet;
- a gases outlet;
- a gases flow channel extending from the gases inlet to the gases outlet and configured to receive a gases flow;
- a reservoir configured to hold a volume of water;
- a water delivery pathway extending from the reservoir to the gases flow channel, wherein the water delivery pathway is configured to allow the water to be drawn from the reservoir to the gases flow channel;
- a heater positioned downstream of the water delivery pathway, the heater configured to provide a heat output to the water drawn into the gases flow channel through the water delivery pathway to humidify the gases flow flowing through the gases flow channel from the gases inlet to the gases outlet;
- at least one upstream sensor located within the gases flow channel and upstream of the water delivery pathway, the at least one upstream sensor configured to provide an upstream signal based on one or more upstream characteristics of the gases flow;
- at least one downstream sensor located within the gases flow channel and downstream of the water delivery pathway, the at least one downstream sensor configured to provide a downstream signal based on one or more downstream characteristics of the gases flow;
- and
- a controller configured to receive the upstream signal and/or the downstream signal to control the heat output of the heater based on the upstream signal and/or the downstream signal.
7 more elements
Dependencies are inferred from the claim text.