| 主权项 |
1. A dryer appliance, comprising:
a cabinet defining a vent; a drum rotatably mounted within the cabinet, the drum defining a chamber for receipt of articles for drying; a conduit that connects the chamber of the drum and the vent of the cabinet such that the chamber of the drum and the vent of the cabinet are in fluid communication; a motor; and an impeller assembly, the impeller assembly having an axis of rotation about which the impeller assembly is rotatable, the impeller assembly being in mechanical communication with the motor; the impeller assembly rotatable about the axis of rotation by the motor in order to urge a flow of air from the chamber of the drum to the vent of the cabinet through the conduit, the impeller assembly defining a radial direction, a circumferential direction and an axial direction, the impeller assembly comprising:
a base plate; anda plurality of blades mounted to the base plate, each blade of the plurality of blades extending from the base plate by a height, BH, along the axial direction, the blades of the plurality of blades spaced apart from each other along the circumferential direction on the base plate;a plurality of extensions mounted to the base plate, each extension of the plurality of extensions extending between a leading portion and a trailing portion, the leading portion of each extension of the plurality of extensions positioned adjacent the axis of rotation, the trailing portion of each extension of the plurality of extensions positioned at a respective blade of the plurality of blades, each extension of the plurality of extensions defining a radius, ER, between the leading portion and the trailing portion, the radius ER being less than the height BH. |
