Patent ID: 9651051
Date: 2017-05-16
CPC Classifications: F04D

Claim:
1. A series fan structure with multistage frame body, comprising: a first main body having a first fan frame, the first fan frame having a first opening and a second opening on two opposite sides, a first fan impeller base seat being disposed at the second opening, a first fan impeller being rotatably connected to the first fan impeller base seat; a second main body correspondingly serially and directly connected to the first main body, the second main body having a second fan frame, the second fan frame having a third opening on one side and a fourth opening on the other side, the third opening corresponding to the second opening, a second fan impeller base seat being disposed at the third opening in adjacency to the first fan impeller base seat, a second fan impeller being rotatably connected to the second fan impeller base seat; a first frame correspondingly serially connected to one side of the first fan frame with the first opening, the first frame having a first frame opening and a second frame opening, the first and second frame openings being respectively positioned on two sides of the first frame with the second frame opening correspondingly communicating with the first opening, the first frame and the first fan frame together defining a first flow passage, the first fan impeller being positioned in the first flow passage; a second frame correspondingly serially connected to one side of the second fan frame with the fourth opening, the second frame having a third frame opening on one side and a fourth frame opening on the other side opposite to the third frame opening, the third frame opening correspondingly communicating with the fourth opening, the second frame and the second fan frame together defining a second flow passage, the second fan impeller being positioned in the second flow passage; and wherein the first frame and the second frame can absorb a vibration which is transmitted from the first and second fan impeller base seats to the first and second openings, respectively.