| 主权项 |
1. A fan comprising:
a housing having a compartment, at least one lateral air inlet and at least one lateral air outlet, wherein the at least one lateral air inlet and the at least one lateral air outlet communicate with the compartment, and wherein the housing is closed at a top and bottom; and a motor received in the compartment and having a stator and an impeller, wherein the impeller is rotatably coupled with the stator and comprises a hub and a plurality of blades, with the hub including a base plate having a top face, and a shaft terminating in the base plate and extending from the base plate opposite to the top face of the hub, with the plurality of blades coupled with the top face of the hub, wherein each of the plurality of blades has a first end and a second end arranged in a radial direction of the impeller, wherein the first ends of the plurality of blades face outwards, wherein the second ends of the plurality of blades jointly define an air-guiding room extending above the top face of the hub and encompassed by a virtual geometric pattern formed by a virtual line linking the second ends of the plurality of blades together, with airflow through the air guiding room not being blocked by the hub including the base plate and the shaft; wherein the virtual geometric pattern has a maximal diameter, wherein a gap is formed between the second ends of adjacent two of the plurality of blades, and wherein the gap is smaller than the maximal diameter of the virtual geometric pattern. |
