Respiratory apparatus

摘要

A flow generator for generating a flow of pressurized breathable gas includes a cylindrical housing and a motor supported in the housing. The motor has a shaft having a first end and a second end opposite the first end. The shaft is generally coincident with an axis of the motor. A first impeller is attached to the first end of the shaft and a second impeller is attached to the second end of the shaft. A stator directs an air flow from the first impeller back towards the motor axis. The housing includes an inlet adjacent the first end of the shaft having an inlet axis generally coincident with the motor axis and at least one outlet between the first and second impellers. The at least one outlet has an outlet axis generally tangential to the motor axis.

主权项

1. A blower assembly configured to deliver a flow of breathable gas at a continuously positive pressure with respect to ambient air pressure to a patient interface in communication with an entrance to a patient's airways including at least an entrance of the patient's nares, while the patient is sleeping, to ameliorate sleep disordered breathing, the blower assembly comprising:
a housing including a first housing portion, second housing portion and a stator portion between the first housing portion and the second housing portion; an axial air inlet provided in the first housing portion; at least two tangential outlets provided in the housing and configured to deliver the breathable gas to the entrance of the patient's airways by way of an air delivery tube and/or the patient interface; a motor supported within the housing, the motor having a shaft that extends from opposite sides of the motor, the shaft being generally coincident with an axis of the motor and the axial air inlet; a first impeller attached to the shaft on a first side of the motor; and a second impeller attached to the shaft on the opposite second side of the motor; wherein rotation of the first and second impellers is configured to cause a flow of air into the axial air inlet to and around the first impeller, the stator portion is configured to direct an air flow from the first impeller around a stator and through a central aperture to the second impeller, the air flow from the second impeller is directed to fold back within the outer periphery of the housing in the direction towards the motor to the at least two outlets between the first and second impellers.