Cleaning device

A cleaning device comprising:

• an inhalation unit to generate inhalation force to inhale air into a main body, wherein the inhalation unit comprises:
• an impeller that is rotatable;
• an impeller cover having an inlet damper formed therein;
• and
• a return channel that is coupled to the impeller cover so that the impeller is capable of being accommodated in the return channel and that is directly coupled to the impeller so that air passing through the impeller is capable of being introduced into the return channel, wherein the return channel is formed when a plurality of units that are capable of being separated from each other are coupled to each other.

A cleaning device comprising:

• an inhalation unit to generate inhalation force to inhale air into a main body, wherein the inhalation unit comprises:
• an impeller that is rotatable;
• an impeller cover having an inlet damper formed therein;
• and
• a return channel that is coupled to the impeller cover so that the impeller is capable of being accommodated in the return channel and that is directly coupled to the impeller so that air passing through the impeller is capable of being introduced into the return channel, wherein
• a plurality of wings are disposed on the return channel so as to form a slope with respect to an axial direction of the impeller.