Flow straightener for axial fans, particularly for conditioning systems

Abstract

A flow straightener for axial fans particularly for conditioning systems, being constituted by a plurality of flat deflection walls, which form a substantially star-shaped profile which is adapted to be arranged coaxially and proximate to the impeller of the axial fan with which it is associated.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Further characteristics and advantages of the invention will become better apparent from the following detailed description of three preferred but not exclusive embodiments thereof, illustrated by way of non-limiting example in the accompanying drawings, wherein:

FIG. 1 is a schematic view of the operation of a free axial impeller;

FIG. 2 is a front view of an axial fan to which a straightener according to the invention in a first embodiment is applied;

FIG. 3 is a side view of an axial fan to which a straightener according to the invention is applied;

FIG. 4 is a side view of a measurement of the behavior of the air flow determined by an axial fan without a flow straightener;

FIG. 5 is a side view of a measurement of the behavior of the air flow determined by an axial fan provided with a straightener according to the invention;

FIG. 6 is a view of a second embodiment of a straightener according to the invention;

FIG. 7 is a view of a third embodiment of a straightener according to the invention.

Claims

1. A flow straightener for axial fans for conditioning systems, comprising a plurality of flat deflection walls, which are arranged so as to form a substantially star-shaped element having a central axis and being adapted to be connected to an axial fan in a mounting position in which said element is arranged coaxially and proximate to an impeller of the axial fan that is rotatably about an axis thereof.

2. The straightener of claim 1, wherein said element has a thickness extension that lies in the mounting position, in a direction of the axis of the impeller.

3. The straightener of claim 1, wherein said flat walls are each constituted by a metallic lamina which is joined at ends thereof to a contiguous additional one of said walls so as to form a series of consecutive vertices which are directed alternately toward an inside and toward an outside region of the star-shaped element formed by said walls.

4. The straightener of claim 3, wherein said element has a continuous structure.

5. The straightener of claim 3, wherein said vertices are substantially angular, two of said walls, which are provided straights, joining at said vertices.

6. The straightener of claim 3, wherein said vertices are substantially angular and formed by one of said walls that is substantially straight and which joins a further one of said walls that has a curved shape.

7. The straightener of claim 3, wherein said vertices are curved.

8. The straightener of claim 4, wherein said element is made from a strip of metal plate that is suitably bent.

9. The straightener of claim 4, made of molded plastic material.