Patent ID: 7670115
Filing Date: 2010-03-02
Classification: F04D,F05D

Abstract:
1. A turbo fan, comprising: a plurality of blades; a main plate coupled to a driving motor and integrally connected to a first side of each blade at a first portion of each of the plurality of blades such that the plurality of blades are arranged radially with respect to a center point of the main plate at predetermined intervals; and a shroud having an opening with a diameter greater than or equal to an outer diameter of the main plate; wherein the shroud, the main plate and the blades are integrally formed by injection molding such that the shroud is connected to each of the plurality of blades at a second side of each blade opposite to the first side of each blade; and a second portion of the first side of each blade that is not connected to the main plate is formed with a slope decreasing in thickness at an outer periphery thereof.