Volute housing for a centrifugal fan, blower or the like

A volute housing for a centrifugal fan, blower or the like comprising a housing body defined by opposite space sidewalls;

• each of said sidewalls being defined by a radially innermost sidewall portion and a radially outermost sidewall portion;
• each radial innermost sidewall portion being of a generally shallow concavo-convex cross-sectional configuration having a terminal edge defining a generally circular fluid inlet opening, each radially innermost sidewall portion also opens generally toward an interior volute chamber of said housing body, said radially outermost sidewall portion being of a generally concavely curved configuration extending generally in the range between 120.degree. and 180.degree., each radial outermost sidewall portion and each radial innermost sidewall portion having a minimum radius and an axial length respectively at a first zone adjacent a tongue of said volute chamber, each radially outermost sidewall portion and each radially innermost sidewall portion having a maximum radius and axial length respectively at a second zone adjacent a throat of said volute chamber said minimum radius and axial length each substantially constantly progressively increasing from said first zone to said second zone, and the arcuate distance between said first and second zones approaching generally 360.degree..

A volute housing for a centrifugal fan, blower or the like comprising a housing body defined by opposite space sidewalls;

• each of said sidewalls being defined by a radially innermost sidewall portion and a radially outermost sidewall portion;
• each radial innermost sidewall portion being of a generally shallow concavoconvex cross-sectional configuration having a terminal edge defining a generally circular fluid inlet opening, each radially innermost sidewall portion also opens generally toward an interior volute chamber of said housing body, said radially outermost sidewall portion being of a generally concavely curved configuration extending generally in the range between 120.degree. and 140.degree., each radial outermost sidewall portion and each radial innermost sidewall portion having a minimum radius and an axial length respectively at a first zone adjacent a tongue of said volute chamber, each radially outermost sidewall portion and each radially innermost sidewall portion having a maximum radius and axial length respectively at a second zone adjacent a throat of said volute chamber, said minimum radius and axial length each substantially constantly progressive;
• increasing from said first zone to said second zone, and the arcuate distance between said first and second zones approaching generally 360.degree..

A volute housing for a centrifugal fan, blower or the like comprising a housing body defined by opposite space sidewalls;

• at least one of said sidewalls being defined by a radially innermost sidewall portion and a radially outermost sidewall portion;
• such at least one radial innermost sidewall portion having a terminal edge defining a generally circular fluid inlet opening, each radially innermost sidewall portion also opens generally toward an interior volute chamber of said housing body, said radially outermost sidewall portion being of a generally concavely curved configuration extending generally in the range between 120.degree. and 180.degree., each radial outermost sidewall portion and each radial innermost sidewall portion having a minimum radius and an axial length respectively at a first zone adjacent a tongue of said volute chamber, each radially outermost sidewall portion and each radially innermost sidewall portion having a maximum radius and axial length respectively at a second zone adjacent a throat of said volute chamber said minimum radius and axial length each substantially constantly progressively increasing from said first zone to said second zone, and the arcuate distance between said first and second zones approaching generally 360.degree. .