Fan and fan frame thereof

摘要

A fan has a fan, an impeller and a motor. The impeller is disposed in the fan frame, and the motor is disposed in the fan frame for driving the impeller. The fan frame has a housing, a base and at least one connecting element. The housing has an inlet and an outlet, and the base is disposed in the housing and at the outlet. The connecting element is disposed between the housing and the base. The base has a first airflow guiding structure disposed on the circumference of the base. The housing has a second airflow guiding structure disposed on the inner circumference thereof and adjacent to the outlet. The first airflow guiding structure and the second airflow guiding structure are correspondingly disposed.

主权项

1. A fan frame applied to an impeller having a hub and several blades disposed around the hub, comprising:
a housing having an inlet and an outlet; a base, disposed in the housing and at the outlet; and at least one connecting element disposed between the housing and the base; wherein the base comprises a first airflow guiding structure disposed on a circumference of the base, the housing comprises a second airflow guiding structure disposed on an inner circumference of the housing and adjacent to the outlet, and the first airflow guiding structure and the second airflow guiding structure are disposed correspondingly, wherein the housing has a first extending portion, a second extending portion and a connecting portion, the first extending portion extends toward the inlet, the second extending portion extends toward the outlet, the connecting portion is connected to the first extending portion and the second extending portion, and the second airflow guiding structure is a recessed portion formed on an inner surface of the second extending portion.