Centrifugal electric fan with a fan wheel contained in a spiral housing, equipped with one lateral grid

FIG. 1 is a bottom plan view of a centrifugal electric fan with a fan wheel containing a spiral housing, equipped with one lateral grid showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view from right thereof;

FIG. 5 is a side elevational view from left thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a perspective view from right hand side thereof, on a reduced scale; and,

FIG. 8 is a perspective view from left hand side thereof, on a reduced scale.

The broken line showing of environmental structure in FIGS. 1, 3 and 8 is for illustrative purposes only and forms no part of the claimed design.