Abstract: An axial-flow impeller includes a hub and blades. A tail edge of one blade has recessed portions successively arranged in a direction from a blade root of the blade to an outer edge of the blade. On a reference projection of the impeller on a reference plane perpendicular to a rotation axis of the impeller, a first connection line connects a starting point of a first recessed portion closest to the blade root and an end point of a second recessed portion closest to the outer edge, a second connection line connects a tail edge point of the blade root and the end point of the second recessed portion, one or more of the recessed portions is each partially located at a front-edge side of the second connection line, and remaining one or more of the recessed portions is each completely located between the first and second connection lines.

Abstract: Disclosed are an air dispersing device and a floor air conditioner. The air dispersing device includes an air dispersing frame and an air dispersing module. The air dispersing frame includes a first air dispersing plate and a second air dispersing plate, and an air cavity is formed between the first air dispersing plate and the second air dispersing plate. An air dispersing hole is provided on the first air dispersing plate, and a ventilation opening is provided on the second air dispersing plate. The air dispersing module includes a movable impeller, the movable impeller is rotatably provided in the air cavity, and the movable impeller is configured to disperse airflows.

Abstract: An axial flow impeller includes a hub and a blade at the hub. A blade edge of the blade includes a blade root edge, a front blade edge, a blade top edge, and a rear blade edge connected sequentially. The blade includes a divider strip arranged between the front blade edge and the rear blade edge and connecting the blade root edge and the blade top edge. At a same circumference, a ratio between a circumferential span from the divider to the front blade edge and a circumferential span from the front blade edge to the rear blade edge is equal to or greater than 0.2 and equal to or smaller than 0.4, a thickness of the divider strip is greater than thicknesses of other portions of the blade, and a thickness of the rear blade edge is smaller than a thickness of the front blade edge.

Abstract: An axial-flow impeller includes a hub and blades. A tail edge of one blade has recessed portions successively arranged in a direction from a blade root of the blade to an outer edge of the blade. On a reference projection of the impeller on a reference plane perpendicular to a rotation axis of the impeller, a first connection line connects a starting point of a first recessed portion closest to the blade root and an end point of a second recessed portion closest to the outer edge, a second connection line connects a tail edge point of the blade root and the end point of the second recessed portion, one or more of the recessed portions is each partially located at a front-edge side of the second connection line, and remaining one or more of the recessed portions is each completely located between the first and second connection lines.

Abstract: A fan includes a first wind wheel having a first rotation axis and a second wind wheel arranged opposite to the first wind wheel and having a second rotation axis. The first wind wheel includes a first hub and a plurality of first blades arranged around the first hub and spaced apart from one another. The second wind wheel includes a second hub not directly coupled to the first hub and a plurality of second blades arranged around the second hub and spaced apart from one another. The first blades and the second blades are tilted towards opposite directions along a circumferential direction.

Abstract: The present disclosure provides an axial flow wind wheel and an air conditioner, the axial flow wind wheel includes a wheel hub and a plurality of blades, the blades are arranged on the wheel hub at intervals, the blade includes a front blade edge and a rear blade edge arranged from front to back, and a top blade edge connecting to outer ends of the front blade edge and the rear blade edge, the top blade edge defines a cut surface inclining from a pressure surface to a suction surface of the blade, and the cut surface extends from the front blade edge to the rear blade edge, the cut surface includes an outer cut edge defined at the top blade edge, and an inner cut edge defined at the pressure surface, and the inner cut edge is defined to concave inwards and protrude outwards, forming a concave-convex shape.

Abstract: An axial flow impeller includes a hub and a blade at the hub. A blade edge of the blade includes a blade root edge, a front blade edge, a blade top edge, and a rear blade edge connected sequentially. The blade includes a divider strip arranged between the front blade edge and the rear blade edge and connecting the blade root edge and the blade top edge. At a same circumference, a ratio between a circumferential span from the divider to the front blade edge and a circumferential span from the front blade edge to the rear blade edge is equal to or greater than 0.2 and equal to or smaller than 0.4, a thickness of the divider strip is greater than thicknesses of other portions of the blade, and a thickness of the rear blade edge is smaller than a thickness of the front blade edge.

Abstract: The present disclosure provides an axial flow wind wheel and an air conditioner, the axial flow wind wheel includes a wheel hub and a plurality of blades, the blades are arranged on the wheel hub at intervals, the blade includes a front blade edge and a rear blade edge arranged from front to back, and a top blade edge connecting to outer ends of the front blade edge and the rear blade edge, the top blade edge defines a cut surface inclining from a pressure surface to a suction surface of the blade, and the cut surface extends from the front blade edge to the rear blade edge, the cut surface includes an outer cut edge defined at the top blade edge, and an inner cut edge defined at the pressure surface, and the inner cut edge is defined to concave inwards and protrude outwards, forming a concave-convex shape.