PAP system blower
A blower includes a housing including an inlet and an outlet, a bearing-housing structure provided to the housing and adapted to rotatably support a rotor, a motor provided to the bearing-housing structure and adapted to drive the rotor, and an impeller provided to the rotor. The bearing-housing structure includes a bearing shaft having a bearing surface that rotatably supports the rotor. The bearing shaft provides only a single bearing of the non-ball bearing type for the rotor.
1. A portable and head-wearable positive airway pressure (PAP) system, comprising:
a headgear wearable on a head of a patient;
a patient interface mask mounted to the headgear and having a cushion to engage with at least one of a nose and a mouth when the headgear is worn by the patient; and
a head-wearable blower supported by the headgear and configured to deliver pressurized air to a breathing cavity of the patient interface mask when the headgear is worn by the patient, wherein the head-wearable blower houses an electric motor, at least one impeller, and an elastomeric bearing component positioned adjacent to the impeller to reduce vibration within the head-wearable blower.
2. The system of claim 1 , wherein the head-wearable blower includes a housing that surrounds the electric motor, the at least one impeller, and the elastomeric bearing component positioned adjacent to the impeller and that is supported within or formed as part of the headgear or the cushion.
3. The system of claim 2 , wherein the electric motor comprises a rotor assembly that includes a rotatable magnet mounted together with a rotatable central shaft to which the at least one impeller is mounted.
4. The system of claim 3 , wherein the elastomeric bearing component of the head-wearable blower has an annular shape that is axially aligned with the rotatable central shaft that drives rotation of the at least one impeller.
5. The system of claim 3 , wherein the elastomeric bearing component comprises a thermoplastic elastomer (TPE) that is overmolded along an annular disc structure within the housing of the head-wearable blower.
6. The system of claim 3 , wherein the rotor assembly and the least one impeller of the head-wearable blower are configured to rotate relative to the housing without the use of ball bearings.
7. The system of claim 2 , wherein a component of a stator of the head-wearable blower is at least partially nested within the at least one impeller.
8. The system of claim 1 , wherein the head-wearable blower is configured to deliver pressurized air at a pressure of 1-8 cm H2O.
9. The system of claim 8 , wherein the electric motor of the head-wearable blower is configured to drive rotation of the at least one impeller at a speed of approximately 15,000 rpm.
10. The system of claim 8 , wherein the electric motor of the head-wearable blower is configured to drive rotation of the at least one impeller to generate a flow of approximately 60-70 L/min.
11. The system of claim 1 , wherein the patient interface mask comprises a full-face mask, a nasal mask, or oro-nasal mask.
12. The system of claim 1 , wherein the patient interface mask comprises nasal prongs or a nasal cannula.
13. The system of claim 1 , wherein the headgear comprises a plurality of straps to retain the patient interface mask in a sealing arrangement along the head of the patient while the head-wearable blower is supported by the head of the patient.
14. The system of claim 13 , further comprising one or more ducts to communicate the pressurized air from the head-wearable blower to the breathing cavity of the patient interface mask.
15. The system of claim 1 , further comprising a filter positioned proximate to an inlet of the head-wearable blower.
16. The system of claim 1 , wherein the electric motor comprises both: a rotor assembly that includes a rotatable magnet mounted together with a rotatable central shaft to which the at least one impeller is mounted; and a stator assembly comprising stator windings positioned radially outward of the rotatable magnet, wherein the stator assembly is configured to act on the rotatable magnet to urge spinning movement of the at least one impeller.
17. The system of claim 16 , further comprising motor wires extending from the stator assembly and through a cover of the head-wearable blower so as to connect with a driver circuit supported by the headgear.