FIG. 1 is a front and top perspective view of a hair dryer, showing my new design;
FIG. 2 is a rear and bottom perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is an enlarged view of a portion indicated with numeric 9 in FIG. 1;
FIG. 10 is an enlarged view of a portion indicated with numeric 10 in FIG. 1;
FIG. 11 is an enlarged view of a portion indicated with numeric 11 in FIG. 2; and,
FIG. 12 is an enlarged view of a portion indicated with numeric 12 in FIG. 2.
The broken lines in the figures illustrate portions of the hair dryer that form no part of the claimed design. The dash dot dash lines in FIGS. 1, 2, 9, 10, 11 and 12 are for the purpose of depicting the boundary lines of the enlarged views and form no part of the claimed design.