Portable Steam Cleaning Appliance

FIG. 1 is a top perspective view of a portable steam cleaning appliance according to the design; FIG. 2 is a front elevation view thereof; FIG. 3 is a back elevation view thereof; FIG. 4 is a right side elevation view thereof; FIG. 5 is a left side elevation view thereof; FIG. 6 is a top plan view thereof; FIG. 7 is a bottom plan view thereof; and, FIG. 8 is a bottom perspective view thereof. The broken lines shown in the figures are for the purpose of illustrating portions of the portable steam cleaning appliance and form no part of the claimed design.