Fan system

A fan system, comprising:

• n or more axial flow fans and n-1 ducts that are alternately disposed on the same axis, where n is an integer of 2 or more,
• the n or more axial flow fans each comprising:
• a fan housing including a housing body formed with an air channel having a suction port and a discharge port, a motor case centrally disposed of the discharge port, and a plurality of stationary blades located in the discharge port and disposed at intervals in a circumferential direction of the axis, the plurality of stationary blades connecting the motor case and the housing body;
• a motor supported by the motor case;
• and
• an impeller disposed between the suction port and the motor case to be rotated by the motor, and
• the n-1 ducts each comprising:
• a duct housing having an inlet port on a front side thereof and an outlet port on a rear side thereof;
• and
• a plurality of duct blades disposed at intervals in the circumferential direction inside the duct housing and extending in an axial direction of the axis, the plurality of duct blades of each duct being equal in number to the plurality of stationary blades of the axial flow fan located in front of the duct as viewed from the air suction port of the axial flow fan, the duct blades corresponding to the stationary blades respectively,
• wherein an end surface of a rear end portion of each stationary blade and an end surface of a front portion of the duct blade corresponding to the stationary blade have the same shape, and they align together and contact each other to form one composite stationary blade, with the discharge port of each axial flow fan communicating with the inlet port of the duct housing located behind the axial flow fan.