Back to results
US 2024/0175443 A1Published application
Blower for breathing apparatus
AssigneeFisher & Paykel Healthcare Limited
InventorJohannes Nicolaas Bothma
Life of this patent
Estimating the term…
Abstract
A blower for a breathing apparatus has a diffuser for increasing static pressure and/or reducing noise and/or mitigating pressure instabilities and/or managing reverse flow.
Claims21
(canceled)
A blower for a breathing apparatus comprising:
- a housing with an inlet and an outlet,
- a motor within the housing for rotating an impeller,
- a diffuser within the housing between the impeller and outlet, the diffuser comprising a plate with aerofoil diffuser elements, wherein the aerofoil diffuser elements are arranged in a plurality of cascades on the plate, each cascade of the plurality of cascades comprising a series of the aerofoil diffuser elements with gaps between each aerofoil diffuser elements in each cascade of the plurality of cascades;
- and
- an annular ramped wall around the impeller.
2 more elements
A blower for a breathing apparatus comprising:
- a housing with an inlet and an outlet,
- a motor within the housing for rotating an impeller,
- a diffuser within the housing between the impeller and outlet, the diffuser comprising one or more circumferential rings with circumferential aerofoil diffuser elements arranged on each of the one or more circumferential rings to direct air to the outlet, the circumferential aerofoil diffuser elements being arranged in a plurality of cascades on each of the one or more circumferential rings, each cascade comprising a series of the circumferential aerofoil diffuser elements with gaps between each circumferential aerofoil diffuser elements in each cascade of the plurality of cascades;
- and
- an annular ramped wall around the impeller.
2 more elements
Dependencies are inferred from the claim text.