<；P>；PROBLEM TO BE SOLVED: To provide a local blower for a greenhouse including an outdoor-side hood set up on the wall surface of a greenhouse, and an air-sucking-side duct communicating with the hood, and structured so that the air-sucking-side duct opens to the inside of the greenhouse, the air-sucking-side duct is provided with an opening opened/closed by a damper and a fan, and an air supply duct is connectedly set up to the air-sucking-side duct, so as to solve the problem: a conventional apparatus does not successfully function because the apparatus only agitates inside/outside air, the outdoor hood thereof always opens and has no insect-proof net while mixing inside/outside air, mixing the outside air with the inside air in winter to eliminate bad effect on crops due to cold air. <；P>；SOLUTION: The local blower for a greenhouse is structured: a switching damper, an impeller and an impeller motor are mounted in a mixing chamber which is set up on the wall surface of the greenhouse and has inside/outside air-sucking ports and an air supply port for supplying outside air, inside air or mixed air； the outside air-sucking port communicates with the opening of an outside air-introducing chamber； an insect-proof net is stretched out to the outside air-introducing port of the outside air-introducing chamber； and the outside air-introducing port is opened/closed by a shutter, so that the mixed air is blown to a local air-supply duct. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
