Respiratory gas humidifier
AssigneeFisher & Paykel Healthcare Limited
InventorsIgor Olegovich Yatsevich, Andrew John Partington, Nordyn Alami
Life of this patent
Estimating the term…
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.
Claims23
A gas humidifier, comprising:
- a reservoir;
- a lid for engaging the reservoir, and
- a gas channel positioned within the lid, the gas channel extending between an inlet and an outlet, the gas channel comprising:
- a flow adjusting region comprising a first portion with a decreasing cross-section and a second portion with an increasing cross-section,
- a first aperture,
- a fluid conduit extending from the first aperture and into the reservoir, wherein the fluid conduit is configured to allow fluid to be drawn from the reservoir and into the gas channel,
- a second aperture configured to collect excess fluid in the gas channel, the second aperture positioned downstream of the flow adjusting region,
- a heater positioned on the second portion of the flow adjusting region, and
- wherein the gas channel has a rectangular cross-section.
A gas humidifier comprising:
- a reservoir;
- and
- a gas channel extending between an inlet and an outlet, the gas channel comprising:
- a flow adjusting region comprising a first portion with a decreasing cross-section and a second portion with an increasing cross-section, wherein the second portion comprises a substantially flat bottom surface,
- a first aperture,
- a second aperture configured to collect excess fluid in the gas channel,
- a recovery conduit that fluidly connects the second aperture with the
- reservoir to allow excess fluid to flow from the second aperture into the reservoir, and
- a fluid conduit extending from the first aperture and into the reservoir, wherein the fluid conduit is configured to allow fluid to be drawn from the reservoir and into the gas channel.
A gas humidifier comprising:
- a reservoir;
- and
- a gas channel extending between an inlet and an outlet, the gas channel comprising:
- a flow adjusting region comprising a first portion with a decreasing cross-section and a second portion with an increasing cross-section, wherein the second portion comprises a substantially flat bottom surface,
- a first aperture,
- a heater positioned on the substantially flat bottom surface of the second portion of the flow adjusting region, and
- a fluid conduit extending from the first aperture and into the reservoir, wherein the fluid conduit is configured to allow fluid to be drawn from the reservoir and into the gas channel.
A gas humidifier comprising:
- a reservoir;
- a lid that engages the reservoir;
- and
- a gas channel positioned in the lid and extending between an inlet and an outlet, the gas channel comprising:
- a flow adjusting region comprising a first portion with a decreasing cross-section and a second portion with an increasing cross-section, wherein the second portion comprises a substantially flat bottom surface,
- a first aperture, and
- a fluid conduit extending from the first aperture and into the reservoir, wherein the fluid conduit is configured to allow fluid to be drawn from the reservoir and into the gas channel.
Dependencies are inferred from the claim text.