Apparatus for the regulated supply of a gas, in particular an assisted breathing apparatus
Inventors
Assignees
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Publication Number
US-9044559-B2
Publication Date
2015-06-02
Expiration Date
Abstract
An apparatus for supplying gas, includes a ventilator having a motor, a rotor having vanes and a volute, a conduit for cooling the motor, and a soundproofing housing containing the ventilator and the conduit. The conduit has a shape similar to the wall of the motor and the volute, thus providing a flow path around the motor and the volute. The conduit also includes two housing portions, one of which includes a set of walls, forming a portion of the soundproofing housing and the conduit, and the other also includes a set of walls, forming the matching portion of the soundproofing housing and the conduit. The portions of the soundproofing housing and the conduit on the same portion of the housing are integral with one another, the two portions being suitable for being assembled together around the ventilator such as jointly to form the conduit and the soundproofing housing.
Core Innovation
The invention relates to an apparatus for delivering a gas, comprising a fan having a motor, a vaned rotor and a volute containing the rotor. The apparatus includes a motor-cooling duct for cooling the motor and a soundproofing housing containing the fan and the motor-cooling duct. The motor-cooling duct has a shape matched to a shape of the motor and that of the volute so that walls defining the motor-cooling duct are spaced from a wall of the motor and the volute.
This spaced relationship provides a flowing duct around the motor and the volute. The soundproofing housing and the motor-cooling duct are formed integrally with one another on the same casing portion by corresponding sets of walls in two casing portions that are adapted to be assembled together around the fan. In this assembled state, the two casing portions jointly form the motor-cooling duct and the soundproofing housing.
Each of the two casing portions forms at least one housing portion that jointly forms, after assembly of the two casing portions, a housing adapted to accommodate a corresponding portion of the fan. The further housing accommodates an opposite end of the motor from the volute or a piece fixed at the opposite end of the motor.
Claims Coverage
The document includes two independent claims, which share a common inventive framework centered on a shaped motor-cooling duct within a soundproofing housing formed by two casing portions.
Shaped motor-cooling duct spaced from motor and volute
An apparatus for delivering a gas comprising a fan with a motor, a vaned rotor and a volute containing the rotor, a motor-cooling duct for cooling the motor, and a soundproofing housing containing the fan and the motor-cooling duct, wherein the motor-cooling duct has a shape matched to a shape of the motor and that of the volute so that walls defining the motor-cooling duct are spaced from a wall of the motor and the volute, thus providing a flowing duct around the motor and the volute.
Integral soundproofing housing and motor-cooling duct formed from two casing portions
Two casing portions form complementary portions of the soundproofing housing and define the motor-cooling duct, with the portions of the soundproofing housing and of the motor-cooling duct on the same casing portion being integral with one another, and the two casing portions being adapted to be assembled together around the fan so as jointly to form the motor-cooling duct and the soundproofing housing.
Casing portions forming housing portions for fan components
Each of the two casing portions forms at least one housing portion that jointly forms, after assembly of the casing portions, a housing adapted to accommodate a corresponding portion of the fan, and a further housing adapted to accommodate an opposite end of the motor from the volute or a piece fixed at the opposite end of the motor.
The claims cover a motor-cooling duct whose walls are shaped to match the motor and volute to create a spaced, flowing cooling duct within a soundproofing housing, together with a two-piece casing that assembles around the fan and forms housings for fan and motor portions.
Stated Advantages
Effective motor cooling.
Reduced number of parts.
Easier/shorter assembly.
Less material.
Improved integration of a low-noise, low-pressure-drop air inlet.
Documented Applications
Assisted breathing apparatus, with a low-noise, low-pressure-drop air inlet and motor cooling for a fan within a soundproofing housing.
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