Impeller for a fan and a range hood

An impeller, comprising:

• a first wheel disc;
• a second wheel disc spaced apart from the first wheel disc, wherein an outer circumference of the first wheel disc is folded away from the second wheel disc to form a first air guide reinforcement rib;
• a plurality of blades that extend between and interconnect the first wheel disc and the second wheel disc, wherein the plurality of blades each have a sawtooth segment that extends from the first wheel disc toward the second wheel disc and wherein each sawtooth segment has oblique teeth;
• a chassis that extends from the first wheel disc toward the second wheel disc;
• and
• a flange coupled to the chassis and configured to engage with a drive shaft of a motor to establish a connection between the impeller and the motor, and wherein said impeller is configured for use within a range hood.

An impeller, comprising:

• a first wheel disc;
• a second wheel disc spaced apart from the first wheel disc;
• a plurality of blades that extend between and interconnect the first wheel disc and the second wheel disc, wherein the plurality of blades each have a sawtooth segment that extends from the first wheel disc toward the second wheel disc, and wherein each sawtooth segment has oblique teeth and is positioned closer to the first wheel disc than the second wheel disc;
• a chassis that extends from the first wheel disc toward the second wheel disc;
• and
• a flange coupled to the chassis and configured to engage with a drive shaft of a motor to establish a connection between the impeller and the motor.

An impeller, comprising:

• a first wheel disc;
• a second wheel disc spaced apart from the first wheel disc;
• and
• a blade that extends between and interconnects the first wheel disc and the second wheel disc, wherein the blade has a sawtooth segment that extends between two-thirds and four-fifths the length of the blade, and wherein the sawtooth segment has oblique teeth that are tilted relative to an impeller axis of the impeller, and wherein the impeller axis defines the centerline of the impeller.