Apparatus for delivery of pressurised gas
AssigneeCompumedics Medical Innovation Pty Ltd
InventorsDavid Burton, Fred Blochlinger, Warwick Freeman, Grant Parratt, Allan Wallace
Life of this patent
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Abstract
The present invention provides a gas delivery device and system and methods for delivering humidified pressurized gas through a conduit to a subject. The configuration of the elements of the gas delivery device enable the device to be conveniently oriented from a horizontal to vertical position to suit the needs of a user. The gas delivery device may incorporate a Helmholtz resonator for dampening sound of the motor. The conduit may incorporate concentric tubes to allow it to conveniently engage the humidifier at a single aperture. The invention includes a method of operating a blower motor for a gas delivery device using a single Hall sensor.
Claims3
A method for controlling a motor of a blower in a gas delivery device, the method being performed by a microcontroller to include the steps of:
- determining a rotational position of an impeller connected to a rotor at a plurality of locations in a rotation of the impeller using a single rotor position sensor which generates rotor position data, wherein the rotor position data is normalized for determining a rotation period of the rotor,
- determining a velocity of the impeller, and
- adjusting a timing of winding excitations for controlling a speed of the impeller.
A method for delivering breathable gas to a subject, the method including the steps of:
- pressurising ambient gas with an impeller connected to a rotor,
- humidifying the ambient gas;
- and
- directing the humidified gas to an airway of a subject;
- wherein the pressurising step include as performed by a microcontroller, controlling a rotation of the impeller from rotor position data detected by detecting a position of the impeller at a plurality of locations in a rotation of the impeller with a single rotor position sensor, wherein the rotor position data is normalized for determining a rotation period of the rotor.
Dependencies are inferred from the claim text.