Water out alarm
AssigneeFisher & Paykel Healthcare Limited
InventorsDean Antony Barker, Jack Che-Wei Hsu, Jae Chul Han
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Abstract
The present invention provides for an improved method of determining a water out condition in a humidified gases supply apparatus. The method includes a two step process including a primary determination of a water out condition and a secondary determination of a water out condition. This primary determination is made during observation of the normal operation of the apparatus. During the secondary determination the method takes temporary control over the humidifying part of the apparatus. The secondary determination confirms or contradicts the primary determination.
Claims21
-15. (canceled)
An integrated humidified gases supply apparatus comprising:
- a casing;
- a flow generator configured to provide a flow of gases;
- a humidifier including a humidifier chamber and a heater plate, the humidifier chamber configured to contain water;
- a nasal cannula configured to provide the flow of gases to a patient;
- and
- a controller,
- wherein the humidifier and the flow generator are integrated in the casing, and
- wherein the controller is configured to monitor apparatus conditions during use of the apparatus and to determine a possible absence of water in the humidifier chamber.
An integrated humidified gases supply apparatus comprising:
- a casing;
- a flow generator including a fan configured to provide a flow of gases;
- a humidifier including a humidifier chamber and a heater plate, the humidifier chamber configured to contain water;
- and
- a controller,
- wherein the humidifier, the flow generator, and the controller are integrated in the casing, and
- wherein the controller is configured to adjust a flow rate output of the flow generator by controlling a speed of the fan, to monitor apparatus conditions during use of the apparatus and to determine a possible absence of water in the humidifier chamber.
Dependencies are inferred from the claim text.