Cooling fan having protrusion at air outlet thereof
AssigneesFu Zhun Precision Industry (Shen Zhen) Co., Ltd., Foxconn Technology Co., Ltd.
InventorsChing-Bai Hwang, Ran Lin
Life of this patent
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Abstract
A cooling fan (20) includes a housing (22) and an impeller (24). The housing has a base (221), a sidewall (222) extending from a periphery of the base with an air outlet (226) defined therein, and a cap (223) covering the sidewall. The impeller has a plurality of blades (242) rotatably received in the housing for generating an airflow. An air channel (225) is formed between tip portions of the blades and an inner face of the sidewall. The air outlet has a near section (226A) and a far section (226C). The airflow first reaches the near section and then the far section. The base of the housing has a protrusion (227) extending into the air outlet for guiding the airflow flowing towards the far section from the near section of the air outlet.
Claims17
A cooling fan comprising:
- an impeller having a plurality of blades;
- and
- a housing having a base, a sidewall extending from a periphery of the base with an air outlet defined therein, and a cap covering the sidewall;
- a chamber formed between the cap, the base and the sidewall, the impeller being rotatably received in the chamber and configured for generating an airflow;
- and
- an air channel formed between tip portions of the blades and an inner face of the sidewall, the air outlet having a near section and a far section, the airflow first reaching the near section and then the far section;
- wherein the base of the housing has a protrusion extending into the air outlet, the protrusion is disposed at the near section of the air outlet and configured for guiding the airflow flowing towards the far section from the near section of the air outlet, and a maximum height of the protrusion occupies substantially a half of a height of the sidewall of the housing.
A cooling fan comprising:
- a housing comprising a chamber, an air outlet communicated with the chamber, a protrusion formed on the housing and protruded into the air outlet, the protrusion having an inner portion adjacent to the chamber and an outer portion adjacent to the air outlet, a height of the protrusion being gradually decreased outwardly from the inner portion towards the outer portion, and a maximum height of the protrusion occupying substantially a half of a height of the chamber;
- and
- an impeller having a plurality of blades disposed in the chamber.
Dependencies are inferred from the claim text.