Diffuser and hair dryer having a diffuser

A hair dryer, comprising:

• a main body including an outlet through which fluid is discharged;
• a handle extending from the main body;
• and
• a diffuser including:
• a case having a front side and a rear side, the rear side configured to be coupled to and removed from the main body, wherein a cross-sectional area of the case increases from the rear side to the front side,
• an inlet provided at the rear side and configured to align with the outlet when the case is coupled to the main body so that fluid discharged from the outlet is introduced to an inside of the case via the inlet to be discharged from the front side of the case;
• a guide frame provided inside the case, the guide frame having a diffusion guide facing the inlet and configured to diffuse fluid introduced through the inlet in a radial direction of the diffusion guide;
• and
• a cover provided at the front side of the case, wherein the cover includes:
• a discharge hole through which fluid introduced into the case is discharged;
• and
• at least one bristle protruding forward and configured to massage a scalp.

A diffuser configured to be coupled to and removed from a hair dryer, comprising:

• an outer shell having concave shape defining a cavity that is configured to surround at least a portion of a human head;
• an inlet configured to align with an outlet of a hair dryer;
• a flange surrounding the inlet, the flange having a coupling structure configured to coupled to and be removed from an end of the hair dryer defining the outlet;
• and
• a guide frame provided inside of the outer shell and configured to align with the inlet, the guide frame having:
• a curved surface at a side of the guide frame facing the inlet, the curved surface configured to align with a center of the inlet,
• a first slot surrounding the curved surface, and
• a second slot spaced apart from and surrounding the first slot, the second slot being positioned closer to an outer edge of the guide frame than a center of the guide frame such that fluid flowing through the inlet is diffused outward from the curved surface to flow through the first and second slots, wherein the center of the guide frame is closer to the inlet than the outer edge of the guide frame.