Patent ID: 7610654

Claim:
A vacuum cleaner comprising: a body defining an outer appearance thereof; a blower fan unit comprising a blower fan and a motor to generate a suction force in the body; an inner case surrounding the blower fan unit and comprising an inner flow path formed therein; an outer case surrounding the inner case; and a discharge flow path formed between the inner case and the outer case to communicate with the inner flow path, wherein the discharge flow path comprises: a circulation flow path branched from the inner flow path to guide circulation of air discharged from the blower fan unit, and a bent flow path branched from the inner flow path to guide the air discharged from the blower fan unit in a direction substantially perpendicular to a direction of air circulated through the circulation flow path such that the air is bent a number of times in the bent flow path, and wherein the inner case includes a lower case to support a lower portion of the blower fan unit, and an upper case coupled to the lower case, the upper case including a cylindrical part having a same radius as that of the lower case, and an extended part extending from the cylindrical part and having a larger radius than that of the cylindrical part, the circulation flow path and the bent flow path being branched from an inner side of the extended part and being joined with each other at an outer side of the cylindrical part.