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Fan and impeller thereof

Inactive Publication Date: 2008-10-02
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]In view of the foregoing, the present invention is to provide an impeller that can increase the air pressure and air flow of a fan.
[0009]In addition, the present invention is also to provide a fan that has an airflow guiding structure formed with the hub for decreasing the airflow channel so as to increase the air flow and air pressure thereof.
[0012]As mentioned above, the fan of the present invention utilizes an airflow guiding structure disposed on the hub to shrink the airflow channel, thereby squeezing the airflow to change its flowing speed. Compared with the related art, the airflow speed is increased so that the air flow and air pressure of the fan are both promoted, thereby improving the performance of the fan.

Problems solved by technology

However, noises come with high-speed rotations.
However, since the space inside the fan frame 10 is insufficient, the hub 121 has a vertical structure.
Consequently, the conventional fan 1 cannot provide good performance.

Method used

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Examples

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Embodiment Construction

[0017]The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.

[0018]FIG. 2 is a cross-sectional view of a fan according to an embodiment of the present invention. Referring to FIG. 2, a fan 2, which is preferably an axial-flow fan, includes a fan frame 20, an impeller 30 and a motor 40. The impeller 30 and the motor 40 are disposed within the fan frame 20. The fan frame 20 includes a main body 201 with a through hole to form an inlet 21, and an outlet 22. The fan frame can have a roughly square, circular; elliptical or rhombus shape. Furthermore, the fan frame 20 includes a base 202 and at least one connecting element 204. The base 202 is preferably disposed near the outlet 22 of the fan 2. The connecting element 204 is disposed between the main body 201 and the base 202 for supporting the base 202. In this embodiment, the connecting element 204...

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PUM

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Abstract

An impeller used in a fan is provided. The impeller includes a hub and a plurality of blades disposed around the hub. The hub has at least one curve-shape surface. A fan comprises a fan frame, an impeller, and a motor. The impeller disposed in the fan frame comprises a hub and a plurality of blades disposed around the hub, wherein the hub has at least one curve-shape surface and an airflow guiding structure disposed on an outer circumference of the hub. The motor is disposed in the impeller for driving the impeller.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This Non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 096111219, filed in Taiwan, Republic of China on Mar. 30, 2007, the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of Invention[0003]The present invention relates to a fan and an impeller thereof, and in particular to a fan and the impeller thereof with increased performance.[0004]2. Related Art[0005]The efficiency of a fan is evaluated by the air pressure and air flow that it can generate. To increase the air pressure and air flow, one method is to increase its rotation speed. However, noises come with high-speed rotations.[0006]FIG. 1 is a cross-sectional view of a conventional fan 1. The fan 1 includes a fan frame 10, a motor 11 and an impeller 12.[0007]The impeller 12 includes a hub 121 and several blades 122 disposed around the hub 121. However, since the space inside the fan f...

Claims

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Application Information

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IPC IPC(8): F01D5/30
CPCF04D29/329F04D29/526
Inventor CHANG, SHUN-CHENHSU, SHUO-SHIU
Owner DELTA ELECTRONICS INC
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