US-12618586-B2 - Device for adjusting an air volume flow

US12618586B2US 12618586 B2US12618586 B2US 12618586B2US-12618586-B2

Abstract

A device for adjusting an air volume flow, in particular in an air distribution network, has a central air channel which can be flowed through. The device has a throttle ( 6 ) which is arranged in the central air channel and which has at least a first throttle portion ( 60 ) having first blocking elements ( 601 ) and a second throttle portion ( 61 ) having second blocking elements ( 611 ). The position of the second blocking elements ( 611 ) can be changed relative to the first blocking elements ( 601 ) in order to change a size of a cross section of the air channel which can be flowed through. The first blocking elements ( 601 ) and the second blocking elements ( 611 ) are configured in such a manner that in approximately all positions between the first end position and the second end position in approximately any radial direction they form a portion of the cross section which can be flowed through. The cross section which can be flowed through is expanded in at least some of the positions between the first and second end positions in the direction towards the longitudinal centre axis (L). The device according to the invention for adjusting a volume flow optimises the outflow behaviour.

Inventors

Tim Röder
Eduard Rempel
Fabian Becker
Paul Mathis

Assignees

VIESSMANN CLIMATE SOLUTIONS SE

Dates

Publication Date: 20260505
Application Date: 20240710
Priority Date: 20230711

Claims (15)

1 . A device for adjusting an air volume flow, in particular in an air distribution network, wherein the device has an air channel which can be flowed through, wherein the air channel defines a longitudinal centre axis and radial directions, wherein the device has a throttle which is arranged in the air channel, wherein the throttle has at least a first throttle portion having first blocking elements and a second throttle portion having second blocking elements, wherein the position of the second blocking elements can be changed relative to the first blocking elements in order to change a size of a cross section, which can be flowed through, of the air channel, wherein in a first end position of the second blocking elements relative to the first blocking elements a minimum size of the cross section which can be flowed through is achieved and, in a second end position, a maximum size of the cross section which can be flowed through is achieved, wherein the first blocking elements and the second blocking elements are configured in such a manner that in approximately all positions between the first end position and the second end position in approximately any radial direction they form a portion of the cross section which can be flowed through, wherein the cross section which can be flowed through is expanded in at least some of the positions between the first and second end positions in the direction towards the longitudinal centre axis, wherein the first blocking elements terminate in a region of the longitudinal centre axis in a common central blocking centre portion, wherein the second blocking elements form free ends in a region of the longitudinal centre axis and wherein the free ends of the second blocking elements are arranged around a central free region which is greater in cross section than a cross section of the central blocking central portion, whereby a free annular region which is covered only partially by the first blocking elements is provided.
2 . The device according to claim 1 , wherein the cross section which can be flowed through in at least some of the positions between the first and second end positions is first tapered and is then expanded in the direction towards the longitudinal centre axis.
3 . The device according to claim 1 , wherein the cross section which can be flowed through forms in at least some of the positions between the first and second end positions a plurality of L-shaped regions which are subdivided by the first and second blocking elements.
4 . The device according to claim 1 , wherein all the positions, including the first and second end position, can be adjusted manually with the device mounted in a wall opening.
5 . The device according to claim 1 , wherein the first and second blocking elements are vanes which are configured to be curved in the radial directions.
6 . The device according to claim 1 , wherein the first blocking elements form bent inflow faces.
7 . The device according to claim 1 , wherein the second blocking elements are configured in a planar manner.
8 . The device according to claim 1 , wherein the device has a third throttle portion with third blocking elements which are arranged in a congruent manner with the first blocking elements, and wherein the second blocking elements are arranged between the first and third blocking elements and can be moved relative thereto.
9 . The device according to claim 8 , wherein the third blocking elements form bent outflow faces.
10 . The device according to claim 1 , wherein the first and, if provided, the third throttle portion is configured in a rotationally secure manner and the second throttle portion is configured to be able to be rotated about the longitudinal centre axis.
11 . The device according to claim 1 , wherein the device has a housing, which is configured for being received in a wall opening.
12 . The device according to claim 1 , wherein the device has an inner flow element, having a cover which is arranged spaced apart from the first and second throttle portions and, if provided, the third throttle portion, wherein the cover has a circumference which increases in the direction away from the throttle.
13 . The device according to claim 11 , wherein the housing is configured for clamping receiving in the wall opening.
14 . The device according to claim 11 , wherein the housing is configured for sealing receiving in the wall opening.
15 . The device according to claim 11 , wherein the housing is configured for clamping and sealing receiving in the wall opening.

Description

TECHNICAL FIELD The present invention relates to a device for adjusting an air volume flow, in particular a supply air valve and/or an exhaust air valve. PRIOR ART Air distribution networks are used particularly in buildings for the aeration and venting and sometimes for the air-conditioning of rooms. Controlled accommodation and office ventilation installations have by now become sophisticated systems which use centralized or decentralized ventilation apparatus. The wall, ceiling or floor openings of a building have air passages having inserts which are connected to the air distribution network. Such air passages change the shape of the air flow and/or they regulate the air volume flow. Depending on the direction of the flow into the room or out of the room, they are referred to as supply air valves or exhaust air valves. They delimit the cross section in the air channel, wherein the size of this limitation can be selected by means of throttles. Unfortunately, such supply and discharge air valves often cannot be adjusted in the installed state or only with a relatively large degree of complexity. Another disadvantage is that individual components of the valve depending on the degree of adjustment of the valve protrude to differing extents into the room, rise from the building wall and impair the visual appearance of the room. Supply air valves, that is to say, valves through which the air flows into a room, additionally often have the disadvantage that they do not distribute the discharged air in a uniform manner. A seated or lying person who is directly exposed to the discharged air may find this to be unpleasant. Furthermore, strips of dirt deposits which are more visible than a uniform deposit are thereby produced. A non-homogeneous discharge behaviour additionally leads to increased noise generation. Another disadvantage is that exhaust air valves, that is to say, valves through which air flows out of a room, often have a different shape from supply air valves. This leads to a rather disturbed appearance in the room. WO 2022/101056 A1 discloses an air volume throttle valve with air directing members in the form of vanes of a rotor. The air directing members are formed in each case by a first and a second air direction unit which can be rotated relative to each other so that the spacing between the air directing members and consequently the cross section, which can be flowed through, of an air channel can be changed. This device enables a changing of the free flow cross section with a consistent location of the narrowest flow cross section. This facilitates the control of the valve. SUMMARY OF THE INVENTION An object of the invention is to provide an improved device for adjusting a volume flow. The device according to the invention for adjusting an air volume flow, in particular in an air distribution network, has an air channel which can be flowed through. The air channel defines a longitudinal centre axis and radial directions. The device has a throttle which is arranged in the air channel, wherein the throttle has at least a first throttle portion having first blocking elements and a second throttle portion having second blocking elements. The position of the second blocking elements can be changed relative to the first blocking elements in order to change a size of a cross section which can be flowed through in the air channel. In a first end position of the second blocking elements relative to the first blocking elements, a minimum size of the cross section which can be flowed through is achieved and, in a second end position, a maximum size of the cross section which can be flowed through is achieved. According to the invention, the first blocking elements and the second blocking elements are configured in such a manner that in approximately all positions between the first end position and the second end position in approximately any radial direction they form a portion of the cross section which can be flowed through, wherein the cross section which can be flowed through is expanded in at least some of the positions between the first and second end positions in the direction towards the longitudinal centre axis. The air channel is preferably a central air channel. According to the invention, consequently, in approximately any adjustment of the throttle cross sections which can be flowed through in any radial direction are present. This is in contrast to known blocking elements with a vane shape in the form of a circle sector which do not enable any regions which can be flowed through inside the blocking circle sector. This distribution, which is changed in comparison with the prior art, of the cross section regions which can be flowed through homogenizes the discharge behaviour. This distribution can be achieved, for example, by distorting the shapes of known blocking elements, in particular throttle vanes. For example, the known circle sector form can be bent until a curved form is produced. Thi