Multi-blade centrifugal fan

• US 20030077174A1
• Filed: 11/30/2001
• Published: 04/24/2003
• Est. Priority Date: 10/17/2001
• Status: Abandoned Application

• Current Assignee: Jae-Won Kim
• Original Assignee: Jae-Won Kim
• Inventors: Kim, Jae-Won
• Application Number:
  US09/996,994
• Publication Number:
  US 20030077174A1
• Time in Patent Office: Days
• US Class Current: 416/186R
• CPC Class Codes: F04D 29/283 rotors of the squirrel-cage type

Abstract

A multi-blade centrifugal fan, the fan arranged with a plurality of blades in round shape and equipped with an end plate mounted with a tip end of the plurality of blades, wherein the end plate is centrally mounted with protruded hub toward an air intake, and here a protruded height (Hb) of the hub is less than 0.3 times the outer diameter (Df), such that although a hub is mounted with a driving motor, an overall structural size is miniaturized to minimize a flow rate loss and to prevent a remarkable fan performance decrease.

Claims

1. A multi-blade centrifugal fan, the fan arranged with a plurality of blades in round shape and equipped with an end plate mounted with a tip end of the plurality of blades, wherein the end plate is centrally mounted with protruded hub toward an air intake, and here a protruded height (Hb) of the hub is less than 0.3 times the outer diameter (Df).

2. The fan as defined in claim 1, wherein the hub is a conical shape having a narrow diameter at air intake.

3. The fan as defined in claim 1, wherein the hub is shaped of a cylindrical form.

4. The fan as defined in claim 1, wherein the hub is formed at lateral surfaces thereof with a plurality of holes for cooling the heat of a motor disposed at a space of the hub.