Air guide arrangement for a ventilation system

Abstract

An air guide arrangement, for a ventilation system, has a housing forming a flow channel with a fan arranged in the flow channel to generate an airflow through the housing. A flow guide device is arranged in the flow channels. The flow guide device is axially connected downstream of the fan on the outflow side and directly influences the airflow generated by the fan. The flow guide device has an axis-central through opening delimited by a tubular element extending parallel to the flow direction. Multiple separate flow segments are formed along the tubular element and are evenly distributed in the circumferential direction. The flow segments in the circumferential direction are each separated from one another in terms of flow by flow guide elements extending radially outward from the tubular element.

Claims

1. An air guide arrangement for a ventilation system, comprising: a housing forming a flow channel and a fan arranged for generating an airflow through the flow channel of the housing; a flow guide device is arranged in the flow channel of the housing, the flow guide device is separate and distinct from the housing, the flow guide device, when viewed as a whole, is cuboid and is axially positioned downstream of the fan on an outflow side and which directly influences the airflow generated by the fan, the flow guide device includes a tubular element, flow segments and an outer wall, the tubular element has an axis-central through opening delimited by the tubular element extending parallel to the flow direction, the multiple separate flow segments are formed around the tubular element; the flow segments are evenly distributed in the circumferential direction, the flow segments are each separated from one another in terms of flow by flow guide elements, the flow guide elements extend radially outward from the tubular element to the flow guide outer wall and the flow guide element extends uninterrupted from the tubular element radially toward the outer wall and in the axial flow direction completely through the flow guide device and wherein, viewed in a radial direction, the flow guide elements are bent on a first marginal section at an inflow side edge and straight on a second marginal section at an outflow side edge and a continuous transition is between the first and second sections; and an effective throughflow cross-sectional area of the individual flow segments varies in an axial direction.

2. The air guide arrangement according to claim 1, wherein the flow guide device outer wall radially encloses the flow segments on an outside and delimits them spatially.

3. The air guide arrangement according to claim 1, wherein, viewed in a radial cross section, the flow guide elements have a straight, a bent or a partially straight and partially bent course.

4. The air guide arrangement according to claim 2, wherein the flow guide elements extend uninterrupted from the tubular element radially outward toward the outer wall and in axial flow direction completely through the flow guide device.

5. The air guide arrangement according to claim 1, wherein, viewed in an axial cross section, the tubular element has a cylindrical, square or octagonal cross section.

6. The air guide arrangement according to claim 1, wherein, viewed in a radial section, the flow guide elements each have an airfoil shape.

7. The air guide arrangement according to claim 1, wherein a sum of the effective throughflow cross section area of all the flow segments determines 50-90% of a total throughflow cross-sectional area of the flow channel in the axial direction.

8. The air guide arrangement according to claim 1, wherein between the flow guide device and an inner wall of the flow channel facing the flow guide device, a spacing is provided.

9. The air guide arrangement according to claim 8, wherein the spacing corresponds to up to 50% of a radial height beginning at the flow segments to an inner wall of the flow segments of the flow channel.

10. The air guide arrangement according to claim 1, wherein an axial extent of the flow guide elements is in a range of 15-150% of an axial cross section of the flow channel.

11. The air guide arrangement according to claim 1 wherein, a guide device enclosing the fan is provided in the flow channel, the guide device extending from an axial inlet of the flow channel to an inner wall delimiting the flow channel.

12. The air guide arrangement according to claim 11, wherein the guide device, viewed in the radial cross section, has a round, or angled or multiply angled cross section.

Description

DRAWINGS

(1) The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

(2) Other advantageous developments of the disclosure are characterized in the dependent claims and represented in further detail below together with the description of the preferred embodiment of the disclosure in reference to the figures. The figures show:

(3) FIG. 1 is a cross-sectional view through an air guide arrangement in a first embodiment;

(4) FIG. 2 is a perspective view of a flow guide device in a first embodiment;

(5) FIG. 3 is a perspective view of a flow guide device in the second embodiment;

(6) FIG. 4 is a perspective view of a flow guide device in the third embodiment;

(7) FIG. 5 is a cross-sectional view through an air guide arrangement in the second embodiment;

(8) FIG. 6 is a cross-sectional view through an air guide arrangement in the third embodiment;

(9) FIG. 7 is a cross-sectional view through an air guide arrangement in the fourth embodiment;

(10) FIG. 8 is a diagrammatic view of a flow segment of a flow guide device in the first embodiment;

(11) FIG. 9 is a diagrammatic view of a flow segment of a flow guide device in the second embodiment;

(12) FIG. 10 is a diagrammatic view of a flow segment of a flow guide device in the third embodiment;

(13) FIG. 11 is a side elevation view of a selection of useable cross-sectional forms of the flow guide elements.

DETAILED DESCRIPTION

(14) Below, the disclosure is further explained in reference to FIGS. 1 to 10 with the aid of the description of the different embodiments, wherein identical reference numerals refer to structurally and/or functionally identical components.

(15) In FIGS. 1 and 5-7, embodiment variants of the air guide arrangement 1 are represented in the radial section. Referring first to FIG. 1, the air guide arrangement 1 includes a housing 3 that forms the flow channel 2. A fan 4 is arranged to generate the airflow through the flow channel 2 of the housing 3. The fan 4 is designed as a radial fan, axial fan or diagonal fan and generates a flow from the inlet 13, in axial direction AR, through the flow channel 2. For this purpose, the fan 4 includes a fan wheel rotating about the rotation axis RA, by means of which air is axially suctioned and axially, diagonally or radially expelled. In a radial fan, a deflection of the flow from the radial direction RR into the axial direction AR occurs.

(16) When viewed in the axial direction AR, downstream of the fan 4 on the outflow side in the flow channel 2, the flow guide device 5 is arranged. It directly influences the air flow generated by the fan 4 in order to reduce the turbulence swirl of the flow. Preferably, the flow guide device 5 is arranged in the axial direction AR directly adjacent to the fan 4. In FIG. 5, the flow guide device 5 extends up to an inner wall 20 of the flow channel 2 formed by the housing 3.

(17) Embodiment examples of the flow guide device 5 are represented in FIGS. 2-4.

(18) According to the embodiment in FIG. 2, the flow guide device 5 is formed by an element 6 that is square when viewed in the axial direction. It is enclosed by an outer wall 10 that is square when viewed in the axial direction. Between the tubular element 6 and the outer wall 10, eight flow guide elements 9 extend evenly distributed in a circumferential direction. The flow guide elements delimit eight flow segments 8 with axial throughflow around an axis-central through opening 7 generated by the tubular element 6. The flow generated by the fan 4 is influenced by each of the elements, tubular element 6, outer wall 10 and in particular flow the guide elements 9.

(19) The embodiment according to FIG. 3 differs from the embodiment example according to FIG. 2 by an octagonal axial cross section of the tubular element 6 and the resulting slightly different connection with the flow guide elements 9, exclusively on surface sections of the tubular element 6. The embodiment according to FIG. 4 differs from the embodiment examples according to FIGS. 2 and 3 by a round cross section of the tubular element 6 but for the rest it is the same. All the flow guide devices 5 according to FIGS. 2-4, when viewed as a whole, are cuboid and fit in the correspondingly formed flow channel 2.

(20) Returning to FIG. 1, a first embodiment of the guide device 14 is also shown positioned in the flow channel 2 around the fan 4. The guide device 14, generated preferably via metal plates, extends with a round cross section from the axial inlet 13 of the flow channel 2 to the inner wall 20 delimiting the flow channel 2. In this manner, it increases the effective throughflow cross section of the flow channel 2 in the flow direction toward the flow guide device 5. FIGS. 6 and 7 in this regard show additional embodiment variants with a multiply angled or straight cross section of the guide device 14.

(21) In all the embodiments according to FIGS. 1 and 5-7, the sum of the effective throughflow cross-sectional area of all the flow segments 8 determines approximately 60% of the total throughflow cross-sectional area of the flow channel 2. Thus, to axial extent of the flow guide device 5 and therefore of the flow guide elements 9 is approximately 50% of the axial cross section of the flow channel 2.

(22) In FIG. 7, a variant of a flow guide device 5 is represented, where its radial extent is smaller than the throughflow cross-sectional area of the flow channel 2. Thus, the outer wall 10 of the flow guide device 5 is spaced from the inner wall 20 of the flow channel 2 by a spacing A. The flow can thus flow radially on the outside past the flow guide device 5 and around the outer wall 10. The spacing A is approximately 50% of the radial height B beginning at the flow segments 8 to the inner wall 20 of the flow channel 2.

(23) The flow guide elements 9 in FIGS. 2-4 are each represented as straight. However, in these embodiment variants, the alternative solutions according to FIGS. 8-10 can be integrated, where the flow guide elements 9 include two marginal sections 11, 12. According to FIG. 8, when viewed in radial cross section, they are bent on a marginal section 11 and straight on the other marginal section 12. In FIGS. 8-10, the inflow side is on the left side, and the outflow side of the flow guide device 5 is on the right side. According to FIG. 9, the flow guide elements 9 are formed identically to the embodiment according to FIG. 8, but they are arranged with an inclination. FIG. 10 shows a variant with flow guide element 9 arranged with an inclination but running in a straight line on both marginal sections 11, 12. The corresponding embodiments can be integrated in all the flow segments 8 of the embodiments according to FIGS. 2-4, even if this is not specifically represented. In addition to the continuous courses of the flow guide elements 9, embodiments with angled or multiply angled flow guide elements 9 can also be additionally implemented. It is also not shown but nonetheless part of the disclosure to design the flow guide elements 9 concavely curved in the shape of an airfoil. The flow elements 9 stand in the flow and influence the flow in the direction of a laminar flow and static pressure.

(24) A selection of the cross-sectional forms of the flow guide elements 9, that can be used according to the disclosure, is diagrammatically shown in FIGS. 11a-11c. FIG. 11a represents a defined rounding. FIG. 11b represents a rounding with a straight line adjoining it in flow direction. FIG. 11c represents a bent form. FIG. 11d represents a multiply angled form with a straight line adjoining it in flow direction.

(25) The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.