<；P>；PROBLEM TO BE SOLVED: To provide a propeller fan for a protected horticulture air conditioner, effective to plant raising in a cultivation greenhouse of horticultural crops such as fruits, garden trees, and flowering plants. <；P>；SOLUTION: This propeller fan is obtained by sticking a plurality of wing plates 2 and 3 to the periphery of a hub 1 attached to a rotary drive shaft 4a. The mounting angle of the arbitrary wing plate 2 in the rotary shaft direction to the hub 1 is different from the mounting angle of the other wing 3. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
