Portable fan display screen displaying graphical user interface for air volume regulation

[0001]FIG. 1 is a front elevational view of a portable fan display screen displaying graphical user interface for air volume regulation showing a first image of a sequence for our new design;

[0002]FIG. 2 is a second image thereof;

[0003]FIG. 3 is a third image thereof; and,

[0004]FIG. 4 is a fourth image thereof.

[0005]The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-4. The processor period in which one image transitions to another image forms no part of the claimed design. The outer broken lines depict a main body of the portable fan and form no part of the claimed design. The remaining broken lines in the drawings depict portions of the portable fan display screen displaying graphical user interface for air volume regulation that form no part of the claimed design.