blower

Abstract

A blower according to an embodiment of the present disclosure comprises a low case in which an inlet is formed; an upper case in which an outlet is formed and which is disposed on the upper side of the low case; a rim disposed inside the low case and including a fan assembly that pressurizes air introduced through the inlet and directs the pressurized air toward the outlet, wherein the fan assembly is open in the vertical direction and forms a periphery; a fan disposed inside the rim and having a plurality of blades rotating around a vertical rotation axis; a hub disposed on the upper side of the fan inside the rim, separated inward in the radial direction from the inner peripheral surface of the rim, and forming a space Vp through which air discharged from the fan flows; and a plurality of vanes extending in the radial direction to connect the rim and the hub and disposed along the peripheral direction, wherein the space Vp includes a first area and a second area of which the separation distance between the hub and the rim in the radial direction is larger than the first area; the plurality of vanes include a first vane disposed in the first area and a second vane disposed in the second area; and the second vane has an entrance angle, which is the degree of inclination of a lower end portion with respect to the vertical direction, larger than the entrance angle of the first vane; accordingly, when a diffuser is formed, a relatively wide flow path is formed in the area suitable for the flow of discharge flow, and in response to the widening of the flow path, vanes are shaped to increase the entrance angle so that the vanes may actively guide the flow; by doing so, air volume of the blower may be increased, and the noise of the blower may be reduced.

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