Patent ID: 9217445
Filing Date: 2015-12-22
Classification: F04D,F04F,F24F

Abstract:
1. A fan comprising: a wind supply device including a hollow base, a blade disposed within the base, and a motor disposed within the base for rotating the blade to create an airflow, the base having a wind supply opening permitting the airflow to exit the base therethrough; and a first wind guide device disposed on the base of the wind supply device and including a first outer loop-shaped wall that is disposed around a first axis and that has opposite front and rear peripheries, a first inner loop-shaped wall surrounded by the first outer loop-shaped wall and secured to and extending from the front periphery of the first outer loop-shaped wall toward the rear periphery of the first outer loop-shaped wall, and a first wind guide wall secured to and extending from the rear periphery of the first outer loop-shaped wall toward the first inner loop-shaped wall, the first inner loop-shaped wall having a distal end portion adjacent to the rear periphery of the first outer loop-shaped wall and extending away from the first axis, the first outer loop-shaped wall further having a distal end portion extending from the rear periphery of the first outer loop-shaped wall and between the distal end portion of the first inner loop-shaped wall and the first wind guide wall, the first outer and inner loop-shaped walls cooperating to define a first loop-shaped space in fluid communication with the wind supply opening and permitting the airflow to enter thereinto, the first loop-shaped space having a first air outlet disposed between the distal end portions of the first outer and inner loop-shaped walls and permitting exit of the airflow therefrom, the first wind guide wall cooperating with the distal end portion of the first outer loop-shaped wall to define a first flow guide channel, the first wind guide wall having a front end disposed in front of the distal end portion of the first outer loop-shaped wall, and a plurality of first air inlets that are angularly spaced apart from each other, that are adjacent to the rear periphery of the first outer loop-shaped wall, and that are in fluid communication with the first flow guide channel, the first flow guide channel having a first wind increasing opening that is disposed at an end thereof distal from the first air inlets and that is in fluid communication with the first air outlet so that, when the airflow occurs in the first loop-shaped space, surrounding air is forced to enter the first flow guide channel through the first air inlets and exit the first flow guide channel through the first wind increasing opening to combine with the air flowing from the first air outlet.