Patent ID: 8808074
Filing Date: 2014-08-19
Classification: F24F

Abstract:
1. A diffuser comprising a diffuser cone with a square- or circular-cross section, and a diffuser casing, the diffuser cone being provided with respect to the diffuser casing in such a manner that an opening rate of a flow passage at an outer periphery between the diffuser cone and the diffuser casing can be controlled, and the flow passage can be selectively opened and closed, wherein the diffuser cone comprises: a motor means fixedly provided in the space, a guide means which prevents the diffuser cone from being rotated and allows the diffuser cone to be only upwardly and downwardly moved during rotation of the motor means and the diffuser cone is upwardly/downwardly movable with respect to the diffuser casing; a lead screw which is connected to a motor rotation shaft of the motor means while rotatably protruding outside a center of the space between the diffuser cone cover and the diffuser cone body; a supporting member which guides upwardly/downwardly movement of the guide means and is provided with a fixing nut to be engaged with the lead screw, wherein the diffuser casing comprises: wherein the supporting member is provided in the inner casing.