Flow generator chassis assembly with suspension seal
A flow generator is configured to pressurize a flow of breathable gas to within a range of about 2-30 cm H 2 O for delivery to a patient's airways. The flow generator includes a blower with at least one impeller and a motor configured to drive the at least one impeller. The flow generator also includes a substantially planar blower mount configured to support the blower. The blower mount includes a flexible blower receptacle portion configured to receive and support the blower. The blower receptacle portion includes an outlet opening that is axially aligned with an air outlet of the blower. The flow generator also includes housing that encloses the blower and the blower mount. The housing has an inner surface that engages a perimeter of the blower mount.
1. A seal for a chassis assembly of a flow generator configured to provide a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to an entrance of a patient's airways including at least an entrance of a patient's nares, wherein the flow generator is configured to maintain a therapy pressure in a range of about 2 cm H 2 O to about 30 cm H 2 O above ambient air pressure throughout the patient's respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing, the chassis assembly including an upper chassis and a lower chassis, the seal comprising:
a blower receptacle sealing portion configured to seal a blower receptacle of the chassis assembly configured to receive a blower configured to generate the flow of breathable gas;
an air inlet sealing portion adjacent to the blower receptacle sealing portion and configured to be in a region of an air inlet of the chassis assembly, the air inlet sealing portion forming a perimeter of a first opening that forms a first passage from a first side of the seal to a second side of the seal; and
an air outlet sealing portion adjacent to the blower receptacle sealing portion and configured to be in a region of an air outlet of the chassis assembly, the air outlet sealing portion forming a perimeter of a second opening that forms a second passage from the first side of the seal to the second side of the seal,
wherein the perimeters of the first and second openings also form part of the blower receptacle sealing portion, and
wherein the seal is configured to be sandwiched between the upper chassis and the lower chassis so that the breathable gas entering the chassis assembly is on the first side of the seal and the pressurized breathable gas exiting the chassis assembly is on the second side of the seal.
2. A seal according to claim 1 , further comprising:
a T-shaped skirt extending around a portion of the seal and configured to seal a junction between the upper chassis and the lower chassis.
3. A seal according to claim 2 , wherein the T-shaped skirt does not extend around the seal in a region of the air inlet of the chassis assembly, and the seal comprises an L-shaped skirt in the region of the inlet of the chassis assembly.
4. A seal according to claim 1 , further comprising:
a plurality of openings configured to receive a respective plurality of fasteners configured to fasten the upper chassis and the lower chassis together.
5. A seal according to claim 1 , further comprising:
a grommet configured to receive a wire of the blower.
6. A seal according to claim 5 , further comprising a blower mount that comprises a guide for aligning the blower so the wire of the blower is received in the grommet.
7. A seal according to claim 6 , wherein the blower mount comprises a plurality of projections configured to engage a plurality of alignment tabs of the blower to align the blower.
8. A seal according to claim 6 , wherein the blower mount comprises at least one bump stop configured to engage the chassis assembly to prevent the blower from engaging the chassis assembly.
9. A seal according to claim 6 , wherein the blower mount comprises an outlet corresponding to an outlet of the blower.
10. A seal according to claim 6 , further comprising a blower mount suspension that comprises a frusto-conical portion between the blower mount and the blower receptacle sealing portion.
11. A seal according to claim 1 , further comprising:
a blower inlet seal opening in a region adjacent the blower receptacle sealing portion.
12. A seal according to claim 1 , wherein a perimeter of the seal corresponds to a perimeter of the lower chassis and/or the perimeter of the upper chassis.
13. A seal according to claim 1 , wherein the seal is formed of a flexible material.
14. A seal according to claim 1 , wherein the seal is formed of an elastically deformable material.
15. A seal according to claim 1 , wherein the seal is formed of silicone.
16. A seal according to claim 15 , wherein the seal is transparent or translucent.
17. A seal for a chassis assembly of a flow generator configured to provide a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to an entrance of a patient's airways including at least an entrance of a patient's nares, wherein the flow generator is configured to maintain a therapy pressure in a range of about 2 cm H 2 O to about 30 cm H 2 O above ambient air pressure throughout the patient's respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing, the chassis assembly including a first chassis portion and a second chassis portion, the seal comprising:
a continuous body configured to be sandwiched between the first chassis portion and the second chassis portion so that a first side of the continuous body faces one of the first and second chassis portions and a second side of the continuous body faces the other of the first and second chassis portions when the chassis assembly is assembled, the continuous body comprising:
a first opening configured to be adjacent to an air inlet of the chassis assembly;
a blower receptacle sealing portion configured to seal a blower receptacle of the chassis assembly configured to receive a blower configured to generate the flow of breathable gas; and
a second opening configured to be adjacent to an air outlet of the chassis assembly and an air outlet of the blower,
wherein perimeters of the first and second openings also form part of the blower receptacle sealing portion, and
wherein the seal is configured so that the breathable gas entering the chassis assembly is on a first side of the seal and the pressurized breathable gas exiting the chassis assembly is on a second side of the seal.
18. A seal according to claim 17 , wherein a perimeter of the continuous body corresponds to a perimeter of the first chassis portion and/or the perimeter of the second chassis portion.
19. A seal according to claim 17 , wherein the seal is formed of an elastically deformable material.
20. A seal according to claim 17 , wherein the seal is formed of silicone.