Quiet Blower Apparatus and System and Method for Reducing Blower Noise
AssigneeResMed Limited
InventorsRobert Henry Frater, Hamish Alexander Urquhart, Dmitri Anatolievich Doudkine, Barton John Kenyon
Life of this patent
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Abstract
A blower assembly including a motor, an impeller and a volute that is configured such that an inlet chamber of the volute and an outlet chamber of the volute are divided from one another by an airtight membrane and the membrane is configured to allow the transmission of pressure waves between the inlet and outlet chambers.
Claims27
1-17. (canceled)
A system for reducing noise generated by a blower, the system comprising:
- a blower, comprising a motor, one or more impellers, an inlet port, and an outlet port;
- an enclosure in which the blower is located, the enclosure being divided into;
- an inlet section including an enclosure inlet port,
- an outlet section including an enclosure outlet port and having a higher pressure than the inlet section in use;
- and
- one or more intermediate sections located between the inlet section and the outlet section;
- and
- one or more flexible membranes, each configured to divide the enclosure and to provide acoustic communication between respective two sections out of the inlet section, the outlet section and/or at least one of the one or more intermediate sections.
A system for supplying a gaseous stream of air comprising an electric motor, impeller, volute and housing assembly having an inlet chamber, an outlet chamber and at least one intermediate chamber, the outlet chamber having a higher pressure than the inlet chamber in use, the chambers being divided by at least one air tight membrane that allows the transmission of pressure waves between the inlet, the at least one intermediate chamber and outlet chamber.
A method for reducing noise generated by a blower, the method comprising:
- housing the blower in an enclosure which includes an inlet section, an intermediate section including an inlet port and an outlet section including an outlet port, the inlet section and the outlet section being separated by flexible membranes, the outlet section having a higher pressure than the inlet section in use;
- and
- configuring the one or more flexible membranes so that the blower inlet section and blower outlet section are acoustically coupled.
Dependencies are inferred from the claim text.