Abstract: A heat-dissipation frame assembly includes a motor frame, an air-guide shield and an airflow-driving device. The motor frame includes a main frame and annular heat-dissipation fins. Each of the annular heat-dissipation fins has an outer edge, and an average radial distance is defined between the outer edge and the central axis. The average radial distances of the annular heat-dissipation fins are decreased gradually in the longitudinal direction from the first end portion to the second end portion, and an external annular channel is formed between any neighboring two annular heat-dissipation fins. The airflow-driving device, disposed at the second end portion of the main frame, is used for generating at least one heat-dissipating airflow. The air-guide shield, connected with the motor frame, surrounds and covers the plurality of annular heat-dissipation fins, such that the at least one heat-dissipating airflow is guided into the plurality of external annular channels.

Abstract: A heat-dissipation frame assembly includes a motor frame, an air-guide shield and an airflow-driving device. The motor frame includes a main frame and annular heat-dissipation fins. Each of the annular heat-dissipation fins has an outer edge, and an average radial distance is defined between the outer edge and the central axis. The average radial distances of the annular heat-dissipation fins are decreased gradually in the longitudinal direction from the first end portion to the second end portion, and an external annular channel is formed between any neighboring two annular heat-dissipation fins. The airflow-driving device, disposed at the second end portion of the main frame, is used for generating at least one heat-dissipating airflow. The air-guide shield, connected with the motor frame, surrounds and covers the plurality of annular heat-dissipation fins, such that the at least one heat-dissipating airflow is guided into the plurality of external annular channels.