Single or Multiple Stage Blower and Nested Volute(s) and/or Impeller(s) Therefor

摘要

A single ended or double-ended blower comprising a blower motor assembly (M) supporting opposed first (258) and second (260) shaft ends, the first (258) and second (260) shaft ends having respective first (244) and second (248) impellers attached thereto and enclosed within first (247) and second (251) volutes, respectively, wherein the first volute (247) is connected to an inlet (264) and the second volute (251) is connected to an outlet (276); and the blower motor assembly (M) supported in a chassis enclosure (238); a radially outer inter-stage path between the first (247) and second (251) volute, wherein the second (251) volute is at least partially substantially concentrically nested with the radially outer inter-stage gas path.