Apparatus for regulated delivery of a gas, notably respiratory assistance apparatus

摘要

The apparatus (1) includes a fan (2) having a motor (5), an impeller (6) and a fan scroll (7). The motor (5) being contained in a motor casing (8) having a first end connected to the fan scroll (7) and an opposite second end; and a casing (22) receiving the fan (2), defining around that fan (2) a space (23) for flow of gas for cooling the fan (2) having an inlet (24). The first end of the casing (8) includes at least one first hole (10) and the second end of the casing (8) includes at least one second hole (11) separated from the inlet (24) to prevent capture of the hot cooling gas leaving the casing (8) by the inlet (24).

主权项

1. An apparatus for regulated delivery of a gas comprising:
a fan including a motor, an impeller driven by the motor, and a fan scroll containing the impeller, the motor being contained in a motor casing having a first end connected to the fan scroll and a second end situated on a side opposite to the fan scroll; and a fan casing for receiving the fan, the fan casing defining around the fan a space for flow of gas for cooling the fan, the space having a gas inlet situated at said second end of the motor casing;wherein:
said motor casing comprises a peripheral wall around which flows the gas for cooling the fan; said first end of the motor casing comprises at least one first inlet hole for admission of cooling gas into the fan casing; and said second end of the motor casing comprises at least one second hole for evacuation of the cooling gas from the fan casing, the second hole or holes being arranged in a traverse end wall and separated from said gas inlet of said fan casing to prevent capture of hot cooling gasses leaving the motor casing by said inlet for admission of cooling gas into said space; and wherein the cooling gas is constituted by a portion of the gas delivered by the apparatus, said first hole or holes communicating with the interior of the fan scroll so a portion of the gas under pressure delivered by the apparatus passes through the first hole or holes and then passes through the motor casing and flows to the exterior of the motor casing via said second hole or holes.