Abstract: A compressor has a rotor assembly having an impeller for generating an airflow through the compressor, a stator core assembly for causing rotation of the impeller, and a diffuser assembly for acting on the airflow generated by the impeller. The diffuser assembly has a first diffuser stage and a second diffuser stage. The first and second diffuser stages are separate components connected to one another by a fastener.

Abstract: A brushless motor has a rotor assembly including a shaft, an impeller, a bearing assembly and a rotor core. The brushless motor has a stator assembly and a frame having an outer portion and an inner portion radially inward of the outer portion. The inner portion supports at least one of the rotor assembly and the stator assembly. The brushless motor has a strut extending between the outer portion and the inner portion. The strut extends at least partially into a recess formed in the stator assembly.

Abstract: A brushless motor has a rotor assembly including a shaft, an impeller, a bearing assembly and a rotor core. The brushless motor has a stator assembly and a frame having an outer portion and an inner portion radially inward of the outer portion. The inner portion supports at least one of the rotor assembly and the stator assembly. The brushless motor has a strut extending between the outer portion and the inner portion. The strut extends at least partially into a recess formed in the stator assembly.

Abstract: An axial impeller has a hub and a plurality of blades extending about the hub. Each blade has a root fixed to the hub, a tip spaced away from the hub, a leading edge extending between the root and the tip, and a trailing edge extending between the root and the tip. The root is inclined at a first angle ? relative to a first axis B parallel to a rotational axis of the impeller, the tip is inclined at a second angle ? relative to the first axis B, and the second angle ? is greater than the first angle ?. A first end of the trailing edge at the root is located downstream of a second end of the trailing edge at the tip, and a first end of the leading edge at the root is downstream of a second end of the leading edge at the tip.

Abstract: A compressor has a rotor assembly having an impeller for generating an airflow through the compressor, a stator core assembly for causing rotation of the impeller, and a diffuser assembly for acting on the airflow generated by the impeller. The diffuser assembly has a first diffuser stage and a second diffuser stage. The first and second diffuser stages are separate components connected to one another by a fastener.

Abstract: A fan assembly for generating an air flow within a room includes a casing having a plurality of inlet sections and an outlet section for receiving air from the inlet sections. Each inlet section has an air inlet, an impeller and a motor for driving the impeller to draw an air flow through the air inlet section and into the air outlet section. The outlet section has an interior passage for receiving air from the inlet sections and an air outlet. The casing defines a bore about which the interior passage extends and through which a secondary air flow from outside the fan assembly is drawn by the air emitted the air outlet.

Abstract: A fan assembly for generating an air flow within a room includes a casing having a plurality of inlet sections and an outlet section for receiving air from the inlet sections. Each inlet section has an air inlet, an impeller and a motor for driving the impeller to draw an air flow through the air inlet section and into the air outlet section. The outlet section has an interior passage for receiving air from the inlet sections and an air outlet. The casing defines a bore about which the interior passage extends and through which a secondary air flow from outside the fan assembly is drawn by the air emitted the air outlet.