Abstract: A fan mechanism includes fan units having fan panels, motors mounted inwardly of said fan panels, fans positioned inwardly of the fan panels and driven by the motors, where a pair of vertical rails is mounted on both sides of each of discharge openings inwardly of the front plate so that the inner portions thereof face each other, panel retainers are attached inwardly to the lower portions of the discharge openings, press portions are formed at upper portions of both sides of the fan panels, both sides of each fan panel are pushed down into the vertical rails downward from above while being guided by the pair of vertical rails, the lower edge of the fan panel rides on the panel retainer, and the press portions are pushed down into the vertical rails, so that the fan panel is pressed against the inside of the front plate.

Abstract: The present invention solves a problem that the registration of screw holes for mounting fan panels on a front plate is practically solved. A fan mechanism includes fan units having fan panels, motors mounted inwardly of said fan panels, and fans positioned inwardly of the fan panels and driven by the motors. A pair of vertical rails is mounted on both sides of each of discharge openings inwardly of the front plate so that the inner portions thereof face each other, and panel retainers are attached inwardly to the lower portions of the discharge openings. Press portions are formed at upper portions of both sides of the fan panels. Both sides of each fan panel are pushed down into the vertical rails downward from above while being guided by the pair of vertical rails, the lower edge of the fan panel rides on the panel retainer, and the press portions are pushed down into the vertical rails, so that the fan panel is pressed against the inside of the front plate.