Flow guide structure and flow guide ring

The invention provides a flow guide structure and a flow guide ring, the flow guide structure comprises a transition cylinder, the transition cylinder is internally provided with a transition cavity for air flow to circulate, the cross section of the transition cavity is gradually reduced along a preset direction, and the transition cylinder is provided with an air inlet for the air flow to flow into the transition cavity; the matching barrel is connected with the transition barrel in the axial direction, a matching cavity communicated with the transition cavity is formed in the matching barrel, the matching cavity is of a cylindrical structure, the axis of the transition cavity is parallel to the preset direction, and the matching barrel is provided with an air outlet allowing airflow to flow out of the matching cavity; the technical problems that in the prior art, a draught fan is not high in working efficiency and large in wind noise are solved. 本发明提供了一种导流结构及导流圈，导流结构包括：过渡筒体，过渡筒体内具有供气流流通的过渡腔，沿预设方向，过渡腔的横截面逐渐