Device for regulating the volume flow of air

Abstract

A device for regulating a constant air volume flow, in particular in an air distribution grid, has air guide bodies which extend in a radial direction and distributed around a longitudinal centre axis (L) of the device. Between adjacent air guide bodies (9) air passages are formed, the opening cross section (80) of which is adjustable. The air guide bodies (9) are formed by a first and a second air guide unit (90, 91) each. By rotating the first air guide unit (90) relative to the second air guide unit (91) the opening cross section (80) of the air passage can be changed. The air guide units (90, 91) are designed in such a way that the air guide bodies (9) formed thereby have at least on the inflow side closed and curved surfaces (213, 313). The unit according to the invention enables a change of the free flow cross section, wherein the position of the narrowest flow cross section remains constant at different adjustment positions.

Description

Technical Field

[0001] This invention relates to a device for regulating air volumetric flow rate, particularly in an air distribution network. Background Technology

[0002] Air distribution networks are used, in particular, in buildings for ventilation and exhaust, and in part for room air conditioning. Controlled residential and office ventilation systems are now well-established systems that use centralized or decentralized ventilation equipment.

[0003] The building's wall, ceiling, or floor openings have air passages with inserts that connect to an air distribution network. These air passages alter the shape of the airflow and / or adjust the volumetric flow rate. Inserts are also partially present in the air distribution network itself to regulate or adjust the volumetric flow rate.

[0004] Given the following inserts, whose channel opening remains unchanged. Other inserts can adjust the air volume flow rate. Inserts that adjust the air volume flow rate are commonly referred to as air volume flow rate regulators, air volume flow rate throttling devices, or air volume flow rate valves. They limit the cross-section of the ventilation duct, and said limitation is optional.

[0005] The insert, depending on the embodiment, has a valve, a plate, or a throttle valve. Examples of this are disclosed in US2018 / 0119970A1 and DE10321518A1.

[0006] DE 1 698 046 A1 discloses a flow regulator for a ventilation system in a living room. The regulator has two wing-like elements in the shape of an annular fan to partially close the passage, and radially projecting blades arranged in a circular pattern. The axial spacing of the blades from the annular fan is used to separate the turbulent flow zone.

[0007] EP 0 414 022 B1 describes a vortex channel in an air channel system having two stacked metal plates, each plate having stamped guide vanes. The cross-sectional area of ​​the opening can be changed by rotating the two metal plates.

[0008] US 5,340,358 A illustrates an air passage having an air guide element in the form of radially swirling blades and an impact plate that limits an annular exit cross-section. The air guide element can be steplessly adjusted in height. Depending on the selected orientation, the air beam can exit at other shapes and other angles.

[0009] EP 2 783 166 B1 discloses a device for regulating the airflow within an air duct, having a tubular body and a ring rotatable around the longitudinal axis of the body. The device also has multiple valves that can rotate about an axis perpendicular to the longitudinal axis as the ring rotates, thereby changing the cross-section of the air passage.

[0010] Optimal regulation of air volume flow rate is typically left to those skilled in the art, as even the smallest mechanical alteration to an air volume flow rate regulator has multiple effects. Therefore, changes in the orientation of a valve or plate not only alter the air volume flow rate but also generate strong eddies in the flow. Pulley-type throttle valves and valves or plates tend to produce disruptive whistling sounds. Furthermore, common air volume flow rate regulators are highly sensitive to disruptive headwinds, such as those occurring after bends or branches. Moreover, they typically operate only in one flow direction and lose their function when reversed. Summary of the Invention

[0011] Therefore, the object of the present invention is to realize a device for regulating air volume flow rate, especially in an air distribution network, the device having a regulating performance that remains as constant as possible.

[0012] The apparatus according to the invention achieves the stated purpose.

[0013] The device according to the invention for regulating air volumetric flow rate, particularly in an air distribution network, has air guides extending radially and distributed around the longitudinal central axis of the device. Air channels are formed between adjacent air guides, the opening cross-section of which is adjustable. Each air guide is formed by a first and a second air guide unit, wherein the first air guide unit is rotatable relative to the second air guide unit around the longitudinal central axis of the device. The opening cross-section of the air channel can be changed by the rotation of the first air guide unit relative to the second air guide unit. The first and second air guide units are configured such that the air guides formed therethrough have closed and curved surfaces, at least on the airflow-facing side.

[0014] The device thus utilizes the optimized flow characteristics of curved wing-like elements without sacrificing the adjustability of the opening cross-section. The air guides collectively form an organizational structure resembling a rotor, wherein the air guides, as a whole, are preferably not capable of rotating about a longitudinal central axis. The individual air guides are arranged around the longitudinal central axis, similar to wing-like elements.

[0015] The device according to the invention is preferably capable of adjusting the volumetric flow rate according to the pre-pressure and attitude of the air guide body, wherein the volumetric flow rate is constant in a selected operating state or operating point, but changes in relation to the pre-pressure.

[0016] The device according to the invention, hereinafter referred to as a throttling element, can be simply composed of a small number of structural units, as shown in the examples below. These units can be adjusted manually and / or by a motor. Adjustment can be performed automatically by means of sensors and control devices. A motor can be disposed in the cavity in the central region of the throttling element. At least one, and preferably only, sensor is preferably disposed at the location of the narrowest free-flow cross-section. Preferably, the sensor is disposed in the region of or at the air guide.

[0017] The throttling element can be configured, for example, clamped or bonded to the inside of the pipe, depending on the implementation. However, the throttling element can also be disposed as a pipe connector between two pipe sections. According to the implementation, the same throttling element is suitable for both installation types.

[0018] Depending on the variability of its volume, the air guide can be configured as a throttling element, wherein the location of the narrowest free-flow cross-section, i.e., the narrowest or smallest opening cross-section, remains consistently at the same position, particularly with respect to the longitudinal central axis of the throttling element. In a preferred embodiment, the first air guide unit is rotatable relative to the second air guide unit, such that the smallest opening cross-section remains at the same position relative to the longitudinal central axis of the device in each relative rotational position of the first air guide unit. This is done in this embodiment regardless of the installation configuration and / or the flow direction of the throttling element. The unchanging location has a particular advantage that a single sensor is sufficient to detect and control the flow performance in all adjusted positions of the throttling element.

[0019] Preferably, all the first air guide units are rotatable relative to their second air guide units. All air guides are formed by the first and second air guide units. For the sake of flow performance, and also for the adjustability and manufacture of the throttling element, it is advantageous that all air guides have the same shape and the same size.

[0020] The air guides are preferably arranged rotationally symmetrically about the longitudinal central axis of the device. Preferably, there are three or more air guides. Eight to forty, preferably ten or twelve, air guides are preferred. Preferably, the number of air guides is even in terms of installability.

[0021] In a preferred embodiment, the air guide is radially arranged around a central protrusion that approximates an ellipsoid. Preferably, this protrusion is provided not only on the inflow side but also on the outflow side. Thus, the throttling element can be used in both directions without altering its flow performance. This is especially true if the air guide is constructed with mirror symmetry. Preferably, the entire throttling element is constructed with mirror symmetry. The mirror axis is preferably centrally located within the throttling element and perpendicular to its longitudinal central axis. The two protrusions form a common protrusion, also referred to as a hub.

[0022] The first air guide unit has a cross-section representing a portion of an ellipse and forms an opening within the ellipse. The second air guide unit has a U-shaped cross-section with two sides and a tab connecting the two sides. These two sides engage with the opening of the first air guide unit at their free ends, wherein the size of the engagement between the two sides and the opening can be changed by relative rotation of the two air guide units. This shape results in optimized flow performance and, despite this, allows for changes in the volume of the air guides, thereby enabling changes in the spacing between adjacent air guides.

[0023] When the tab is bent outwards, the flow properties are further optimized, wherein its outermost line is preferably centered between the two sides. The tab is preferably bent so that it forms part of an ellipse.

[0024] Preferably, the outermost line of the air guide tab and the outermost line of the first air guide unit of the adjacent air guide extend on a common annular surface that extends perpendicular to the longitudinal central axis of the device, wherein the annular surface remains in its position relative to the longitudinal central axis as the first air guide unit rotates relative to the corresponding second air guide unit of the two adjacent air guides. This enables the narrowest free-flow cross-section to remain unchanged regardless of the rotational position of the first and second air guide units relative to each other.

[0025] In a preferred embodiment, the second air guide unit comprises first and second blades, wherein all the first blades are disposed in a common portion, and all the second blades are disposed in a common second portion. The two portions are configured to be interlocked, wherein the two portions, in the interlocked state, accommodate a first air guide unit rotatable relative to it between them.

[0026] Preferably, each of the first air guiding units comprises a first air guiding element and a second air guiding element, wherein all the first air guiding elements are disposed in a common portion, and all the second air guiding elements are disposed in a common second portion. The two portions are configured to be interlocked to form a common rotatable portion.

[0027] The preferred configuration of the air guiding unit enables the manufacture of a one-piece structural unit that can be easily inserted together. In particular, the structural unit can be manufactured from plastic using an injection molding method. Manufacturing costs are thus minimized and the assembly of the throttling element is simplified. This makes it particularly possible to manufacture throttling elements that are mirror-symmetrically configured in the assembled state, thus enabling bidirectional use.

[0028] In other embodiments suitable for unidirectional use, the first air guide unit has a hook-shaped cross-section with a short side, a long side, and a rounded arc portion. The second air guide unit has an L-shaped cross-section with a short side, a long side, and an arc portion with an angle of less than 90° connecting the two sides. The short side of the first air guide unit rests on the short side of the second air guide unit, and the short side of the first air guide unit is movable when rotated relative to the short side of the second air guide unit. This changes the distance between the first and second air guide units.

[0029] This embodiment can also be manufactured from individual structural units, particularly those made of plastic. These structural units can be assembled in a simple manner and method.

[0030] Other embodiments are given in the dependent claims. Attached Figure Description

[0031] Preferred embodiments of the present invention are described below with reference to the accompanying drawings, which are for illustrative purposes only and should not be construed as limiting. The drawings show: Figure 1 An exploded perspective view of an apparatus for regulating air volume flow rate according to the invention, based on a first embodiment, is shown. Figure 2 The following is shown in the first step during assembly: Figure 1 A three-dimensional view of the device; Figure 3 The following is shown in the second step during assembly: Figure 1 A three-dimensional view of the device; Figure 4 The following is shown in the first application position in the assembly state. Figure 1 A three-dimensional view of the device; Figure 5 The following is shown in the assembly state at the second application position according to Figure 2 A three-dimensional view of the device; Figure 6a The following is shown in the first application position in the assembly state. Figure 1 A three-dimensional view of a part of the device; Figure 6bThe following is shown in the first application position in the assembly state. Figure 1 A three-dimensional view of a variant of a part of the device; Figure 7a The basis shown in the second application location Figure 6a A three-dimensional view of a part of the device; Figure 7b The basis shown in the second application location Figure 6b A three-dimensional view of a part of the device; Figure 8 The front shows the basis Figure 1 A view of the device; Figure 9 The diagram shows the installation through the ventilation duct. Figure 1 A longitudinal section of a variant of the device; Figure 10 Showing according to Figure 1 A perspective view of the internal components of the device according to the invention, and Figure 11 A perspective view of the internal components of the device according to the invention in another embodiment is shown. Detailed Implementation

[0032] Figure 1 The preferred device according to the invention is shown in four individual components, referred to below as throttling elements. Each of the four parts 1, 2, 3, and 4 is preferably constructed as a single piece and forms an independent structural unit. The four parts 1, 2, 3, and 4 are preferably made of plastic.

[0033] The first part 1 has a hollow cylindrical first housing 10. Radially inwardly extending first blades 11 are provided on the inner circumference of the first housing 10. The blades 11 are preferably distributed equidistantly over the entire inner circumference of the housing 10. Each blade 11 has a first wall 111 and a second wall 112 formed thereon. The first wall 111 extends parallel to the longitudinal central axis L of the throttling element or, as in this example, slightly inclined relative to the longitudinal central axis L. The second wall 112 extends relative to the first wall 111 at an angle of 90° or greater, thus extending generally or slightly inclined to a plane extending perpendicular to the longitudinal central axis L. Preferably, the second wall 112 is curved.

[0034] The first wall 111 of each blade 11 preferably protrudes from the first housing 10 at its end. The second wall 112 of each blade 11 is preferably located inside the first housing 10. Preferably, all first blades 11 are identically constructed, i.e., have the same shape and the same size. All first blades preferably extend from the first housing 10 at the same distance and are preferably arranged on a circle extending concentrically with the longitudinal central axis L.

[0035] Each blade 11 has a recess 110 on its first wall 111 at an end opposite to the second wall 112. In this example, the recess is rectangular. The width of the first wall 111 is preferably tapered inwards. The wall thickness is preferably constant.

[0036] Each blade 11 is formed or fixed to the inner wall of the first housing 10 by means of a wider end on its end side, and each blade retains an inner ring by means of a narrower end on its inner end side, referred to herein as a hub 120. The hub 120 is preferably constructed as a single piece with the blade 11 and the first housing 10. The hub 120 preferably does not protrude from the first housing 10. The hub has a connecting plate 121 that protrudes axially relative to the end of an adjacent end side of the first housing 10, the connecting plate being interrupted by a recess 122. The recess 122 and the connecting plate 121 are preferably evenly distributed around the circumference of the hub 120.

[0037] The hub 120 transitions into the protrusion 12 at its opposite ends via radially outwardly extending circumferential steps 123. Preferably, the blade 11 is also fixed to the outer circumference of the protrusion 12 and more preferably formed therein in one piece. The protrusion 12 preferably has an ellipsoidal aerodynamic shape. It is disposed within the first housing 10 and preferably does not extend beyond the first housing.

[0038] The fourth part 4 of the device is preferably constructed in the same manner as or radially symmetrical to the first part 1. Therefore, this will not be described in detail here. The above description can be used similarly. The fourth part 4 also has a hollow cylindrical basic body, referred to herein as the second basic body 40. The blade is referred to as the second blade 41, which respectively replaces the recess with a connecting plate 410 and a first wall 411 and a second wall 412. Also present are protrusions 42, hubs 420, connecting plates 421, recesses 422, and steps 423.

[0039] The fourth part 4 is arranged in a mirror image of the first part 1, such that its protrusions 12 and 42 are oriented away from each other; that is, the narrow ends of the protrusions are oriented outward, away from the throttling element.

[0040] The fourth part 4, with its connecting plate 421 and recess 422, is configured to engage with the first part 1, with its recess 124 and connecting plate 121, thereby enabling a form-fitting connection between the first and fourth parts. In the created connection, the two steps 123, 423 of the first and fourth parts 1, 4 are spaced apart from each other, with the inner rings 22, 32 of the second and third parts 2, 3 (mentioned below) disposed therebetween.

[0041] Two additional parts 2 and 3 are provided between the first and fourth parts 1 and 4. These parts 2 and 3 can also collectively constitute a single structural unit, i.e., a common intermediate part. Preferably, however, they are composed of two separate structural units, each preferably constructed as a single piece. This simplifies manufacturing and installation.

[0042] The second part 2 has a first outer ring 20, on which a first air guide element 21 is formed or fixed. The first air guide elements 21 are preferably equidistantly distributed on the inner circumference of the first outer ring 20. They extend radially inward and terminate at a common first inner ring 22. The number of first air guide elements 21 corresponds to the number of first and second blades 11, 41 in the first and fourth parts 1, 4. The inner diameter of the first inner ring 22 is the same as or preferably larger than the outer diameter of the hub 120 of the first part 1, such that the first inner ring 22 can surround the hub 120.

[0043] The first inner ring 22 has a recess 222 on its side opposite to the first part 1, and the recess is preferably evenly distributed around the circumference. The end face of the first inner ring 22 facing the first part 1 is preferably flat and without steps.

[0044] The first outer ring 20 also has recesses 200 on its side facing away from the first part 1, the recesses preferably being evenly distributed around the circumference. The end face of the first outer ring 20 facing the first part 1 is preferably also flat and without steps. The outer diameter of the first outer ring 20 preferably corresponds to the outer diameter of the shell of the first part 1, such that the outer surfaces of the two parts 1 and 2 are aligned with each other in the engaged state.

[0045] The first air guide element 21 is curved. It preferably has a U-shaped or L-shaped cross-section. A first side 211 is fixed to the first outer ring and the first inner rings 20, 22. It has a recess 210 facing away from the first portion 1. The shorter second side 211 terminates freely. The angle between the two sides 211, 212 is preferably greater than 90°. The two sides 211, 212 are preferably curved in cross-section. The free end face of the shorter second side 212 is preferably flat and without steps.

[0046] Each first air guide element 21 preferably has the shape of a portion of an ellipse in cross-section, wherein the portion includes an arcuate part of the ellipse. Preferably, all cross-sections through the first air guide element 21 have this shape.

[0047] The first air guide element 21 tapers towards the first inner ring 22. That is, in cross-section, the cross-section of the ellipse becomes smaller. The width of at least one side, preferably both sides 211 and 212, decreases towards the first inner ring 22. Preferably, the opening angle of the ellipse also decreases towards the first inner ring 22.

[0048] The first air guide element 21 is oriented toward the first portion 1, wherein its closed arcuate portion 213 is disposed toward the first portion 1. The shorter side 212 of the first air guide element 21 terminates spaced apart from the first outer ring and the first inner rings 20, 22.

[0049] The third part 3 is preferably constructed in the same shape and size as the second part 2, wherein only the connecting elements are precisely mirror-shaped relative to the second part 2. Therefore, referring to the description above, the third part 3 also has an outer ring and an inner ring, referred to as the second outer ring 30 and the second inner ring 32. An air guide element is referred to as the second air guide element 31. The air guide element has a longer side 311, a shorter side 312, and an arcuate portion 313. The number of air guide elements 31 is the same as the number of first air guide elements 21. The arrangement of the air guide elements on the circumference of the third part 3 is also the same as that of the second part 2. The air guide element extends away from the second part 2 and toward the fourth part 4 by means of its closed arcuate portion 313.

[0050] However, at the second outer ring 30, facing the second portion 2, a receiving plate 300 is provided as an alternative recess, which engages with the recess 200 of the first outer ring 20. Similarly, at the second inner ring 32, a receiving plate 320 is provided as an alternative recess, facing the second portion 2 and engaging with the recess 222 of the first inner ring 22. The second air guide element 31 also has a receiving plate 310 at its first longer side, which engages with the recess 210 of the first air guide element 21.

[0051] exist Figure 2 and 3 What is now visible is how the various parts of the throttling element according to the invention can be joined together.

[0052] The second and third parts, 2 and 3, are joined together and preferably snapped together. This is in Figure 2 As shown in the diagram. Here, the corresponding plates of the second rings 30, 32 and the second air guide element 31 engage with the recesses of the first rings 20, 22 and the first air guide element 21. The longer sides 211, 311 of the first and second air guide elements 21, 31 are aligned with each other here. This is in Figure 3As can be seen, the shorter sides 212 and 312 of the corresponding two air guide elements 21 and 31 terminate at intervals from each other. The two air guide elements 21 and 31 together constitute a first air guide unit, which forms a partially elliptical body with lateral openings. Figure 3 Reference numeral 6 in the figure indicates the motor 6, which is schematically shown and described more below.

[0053] The second and third parts 2 and 3 can be individually or in combination inserted into the first part 1. Subsequently, the fourth part 4 can be connected to the first part 1 by means of connecting plates 121 and 421 and recesses 122 and 422. Simultaneously, the connecting plate 410 of the second blade 41 of the fourth part 4 engages with the recess 110 of the first blade 11 of the first part 1. Each of the first and second blades 11 and 41 forms a U-shaped element having two parallel sides and a tab connecting these sides. Preferably, the tab is configured to be curved outwards. More preferably, the arcuate portion of the tab is part of an ellipse. The U-shaped element forms a second air guide unit.

[0054] The inner rings 22 and 32 of the second and third parts 2 and 3 surround the hubs 120 and 420 of the first and fourth parts 1 and 4. This situation is... Figure 3 As shown in the image.

[0055] exist Figure 4 and 5 The throttling element according to the invention is shown in an assembled state. It is readily apparent that the outer surface of the throttling element is configured to remain constant and preferably does not have protrusions or recesses. The surfaces of the various parts 1, 2, 3, and 4 are flush with each other.

[0056] Figure 8 A view of the throttling element is shown. The free flow cross-section lies between the radially outwardly extending air guides. One of the free cross-sections is shown in the drawing with shading and is labeled 80.

[0057] In the engaged state, the free end faces of the shorter sides of the first and second air guide elements 21, 31 abut against the second walls 112, 412 of the corresponding first and second blades 11, 41. This is in Figure 6a and 7a It is clearly visible in the middle.

[0058] The first and second blades 11 and 41, together with their respective first and second air guide elements 21 and 31, form a closed body. The shape of the closed body can be changed according to the rotational positions of the second and third parts 2 and 3 relative to the first and fourth parts 4. In the first position, according to Figure 6aThe blades 11 and 41 and the air guiding elements 21 and 31 each form a common body, the cross-section of which is elliptical or approximately elliptical in shape. According to... Figure 7a In the second position, it forms a body with a cross-section corresponding to an ellipse having a narrow rectangle with lateral suspension and circular walls. Alternatively, an approximate elliptical shape is also possible here, i.e., an approximate elliptical shape.

[0059] The closed body is formed within the air guide 9 of the throttling element. The air guide 9 and its arrangement at the protruding body formed by the two protrusions 12, 42... Figure 10 The protruding part is also called the hub part. Each air guide 9 is distributed around the circumference of the throttling element at a distance from each other. The distance forms the airflow opening of the throttling element, as shown in... Figure 10 As clearly visible in the middle.

[0060] As in Figure 6a , 7a As is clearly visible in 10, the air guides 9 are positioned at the same height about the longitudinal centerline L and are preferably constructed in the same manner.

[0061] exist Figure 10 The separation line is not shown in the figure; it would indicate the elements of each part 1, 2, 3. This separation line can be derived from other figures and descriptions. Furthermore, the separation line may not be present as in this example, but could be located in other locations according to the embodiment. As already explained, the two internal parts 2 and 3 can be constructed together as a single piece. In other embodiments, other parts or elements can also be constructed together as a single piece. The connecting mechanism described above, in the form of a recess and a connecting plate, can be replaced by other suitable connecting mechanisms, preferably by snap-fit ​​or locking elements.

[0062] Air guide elements 21 and 31 form a first air guide unit in the form of a partially elliptical body 90°, the cross-section of which shows a non-closed ellipse. The closer the cross-section is to the longitudinal central axis L, the smaller the ellipse and the smaller the angle between the two elliptical arcs.

[0063] Two blades 11 and 41 form a second air guide unit in the form of a U-shaped element 91. The free ends of the ellipsoid 90 terminate abutting or slightly spaced from its two sides 910 to allow for unobstructed adjustment. The tab 911 of the U-shaped element 91 bends outward in the form of an elliptical segment. The tab 910 has a longitudinal central axis Q that extends perpendicular to the longitudinal central axis L of the throttling element. The line of the tab 910 along the longitudinal central axis Q protrudes furthest. Viewed along the longitudinal central axis L of the throttling element, on the opposite side of the air guide 9, the corresponding lines of the wall portion of the ellipsoid 90 protrude furthest at the same location. Therefore, these lines define the region or location of the narrowest flow cross-section 8. The closer the corresponding location is to the longitudinal central axis L of the throttling element, the smaller the flow cross-section.

[0064] As already mentioned, the shape of the air guide 9 can be changed by the joint rotation of the two internal parts, namely the second and third parts 2 and 3. This also changes the spacing between the air guides 9. Preferably, all spacing changes to the same degree. Therefore, the free flow opening of the throttling element can be changed. The reason for this is that, by rotating the two parts 2 and 3, the shorter sides 212 and 312 of the first and second air guide elements 21 and 31 are pushed onto the shorter sides 112 and 412 of the first and second blades 11 and 41, thereby closing the shape of the air guide 9 according to... Figure 6a The case with the largest flow opening is placed according to... Figure 7a In the case of having the smallest flow opening.

[0065] Preferably, the air guide 9 does not have rectangular and / or sharp-edged surfaces at any position. The surfaces of each air guide 9 are circularly formed at any rotational position of the throttling element. This optimizes the reduction of flow resistance.

[0066] Regardless of the rotational positions of the two internal portions 2 and 3, the area of ​​the narrowest flow cross-section always remains in the same location, more precisely, regardless of the installation conditions and the flow direction. In this example, this location is situated between the curved U-shaped element 91 of the first guide body 9 formed by the first and second blades 11 and 41, and the curved rear portion 211 and 311 of the partially elliptical body 90 of the adjacent air guide body 9 formed by the first and second air guide elements 21 and 31. This location is... Figure 10 The attached figure is labeled 8.

[0067] The narrowest flow cross-section 8 is located at the point where the curved tab 911 of the U-shaped element 91 protrudes most prominently. In this example, this location is at the tab positions of the first and second blades 11, 41 of the first and fourth parts 1, 4, in which parts 1, 2, 3, 4 are symmetrically and approximately identically constructed. This also corresponds in this part to the connection point of the two air guide elements 21, 31 of the second and third parts 2, 3.

[0068] The flow characteristics are optimized by the U-shaped element 91 formed by the two blades 11 and 41. Because the tab 911 is curved, flow stripping is avoided, pressure loss is prevented, and noise development is reduced. The straight configuration of the side 910 of the U-shaped element 91 enables optimized connection with the air guide elements 21 and 31 in each rotational position of the middle portions 2 and 3. Because the air guide 9 does not have sharp edges, unwanted noise development is avoided.

[0069] According to the embodiment, the protrusions 12 and 42 of the first and fourth portions 1 and 4 protrude from the air guide body 9 along the upstream or downstream direction, respectively, as shown in the example. Figure 6a and 7a As can be seen, or it is positioned behind the foremost surface of the air guide.

[0070] exist Figure 9 In the same drawing, two installation scenarios are shown in the ventilation duct 7, preferably in a duct 7 having a circular cross-section. The throttling element according to the invention can be completely introduced into the duct 7 and fixed there. This is... Figure 9 The lower region is shown. However, the throttling element can also be used alternatively as a pipe connection. This is in Figure 9 It is shown in the upper region.

[0071] For use as a pipe connector, preferably, at least one radially outwardly projecting stop tab 101, 401 is present at each of the first and fourth portions 1, 4. Preferably, a plurality of stop tabs 101, 410 are distributed circumferentially. The two pipe portions 7 can be engaged with the tabs 101, 401. In this assembly configuration, the throttling device is operated manually and / or by a motor, depending on the embodiment. During manual operation, the first and second handles 201, 301 are freely accessible. However, in... Figure 9 Not shown in the image.

[0072] For use within pipe 7, the throttling device, according to the embodiment, is configured without stop tabs 101, 401 and handles 201, 301. The throttling device is preferably motor-operated. Alternatively, stop tabs 101, 401 and / or handles 201, 301 are present. However, they can be broken off into pipe 7 before installation. Preferably, a theoretical breakage point is provided for this purpose.

[0073] Due to its mirror-symmetric design, the throttling device can be used bidirectionally. That is, it can be installed in two flow directions and has the same functional characteristics in both directions. This bidirectional flow-facing capability is achieved through… Figure 10 The double arrows in the diagram are shown.

[0074] Two external portions 1 and 4 are torsionally secured within the ventilation duct 7. Two internal portions 2 and 3 are capable of rotating together relative to the two external portions 1 and 4, and thus also relative to the ventilation duct 7. Depending on the embodiment and installation, they can be rotated manually. Preferably, at least one handle is provided at at least one location on either of these portions. Figure 6b and 7b As shown, the second and third parts 2 and 3 have at least one first and second radially outwardly projecting handle 201 and 301 at their circumference, which are aligned with each other and form a common grip in the assembled state of the two parts 2 and 3. In this example, a plurality of such handles 201 and 301 are distributed circumferentially.

[0075] Alternatively or additionally, the two internal parts 2 and 3 can also rotate together by means of the motor 6. Figure 9 As can be seen, the corresponding motor is disposed in the cavity H, and rotates the two internal parts 2 and 3 by means of two protrusions 12 and 42 inserted into each other. Preferably, a corresponding transmission device 60 is disposed within the cavity H, such as a gear transmission device with internal gears.

[0076] Wireless or wired connection to external control devices, particularly to air distribution networks, such as ventilation systems for building guidance systems, is feasible. The motor's current supply can be provided via corresponding current conductors or can also be housed within the hollow bodies of protrusions 12, 42. In one embodiment, a generator is present within the throttling element, fed by the flow and / or rotational motion of a turbine-type device driven by airflow outside the protrusion.

[0077] In a preferred embodiment, a sensor 5 is also present. This sensor is capable of, for example, in... Figure 4 It is positioned on the outside of one of the air guides as can be seen. Other locations, such as at one of the two inner rings, are also feasible. Preferably, it is positioned along the line defining the region of the narrowest flow channel 8.

[0078] Multiple sensors can be used. Preferably, only one sensor is present. Flow velocity, temperature, and / or CO2 or VOC concentration (VOC = Volatile Organic Compounds) are measured by means of at least one sensor 5. Particularly suitable sensors 5 are Peltier elements or heated wire anemometers for measuring flow velocity or temperature.

[0079] At least one sensor 5 is preferably connected to the control device of the motor 6 and / or the ventilation system of the air distribution network. The throttling device thus enables automatic operation of the sensor measurements.

[0080] exist Figure 11 The internal portion of another embodiment is shown. The principle of having four parts pushed into each other is preferably the same. However, fewer parts are also possible. An outer ring and an outer shell are also present here, but are not shown. The throttling element can only be directed towards the flow on one side, as indicated by the wide arrows. On the directed side, there is a protrusion 12 preferably configured as an ellipse. On the opposite side, the outflow side, instead of the protrusion, there are sharp-edged breaks or wide ends of droplets. In this example, the rear portion 42' is configured as a sharp-edged break in the form of a hollow cylinder.

[0081] Air guide 9' has according to Figures 1 to 10 The air guide has different shapes. It consists of a hook-shaped element 90' and an L-shaped element 91'. The hook-shaped element 90' has a short side 900' that extends parallel to the longitudinal central axis L of the throttling element at its free end and is used to place onto the L-shaped element 91'. The short side 900' transitions to a longer side via an arcuate portion 901', which includes two sub-sides. The first sub-side 902' connecting the arcuate portion 901' extends at an angle to the longitudinal central axis L of the throttling element. Preferably, it is straight. The second sub-side 903' following the first sub-side 902' extends at a greater angle to the longitudinal central axis L of the throttling element. Preferably, it is straight. However, the second sub-side 903' can also be curved.

[0082] The L-shaped element 91' has a short side 910' and a long side 911'. The two sides 910' and 911' form an angle preferably less than 90°. The short side 910' preferably extends in a plane perpendicular to the longitudinal central axis L of the throttling element. Its outer surface is used to movably support the short side 900' of the hook-shaped element 90'. The long side 911' of the L-shaped element 91' is inclined toward the second sub-side 903'. It preferably continues to extend toward the outlet end of the throttling element as the second sub-side 903'. The outer corners of the L-shaped element 91' are preferably rounded so that the air guide 9' does not have sharp edges on the front side. The air guide 9' is closed on the front side. On the outlet side, it can be configured to be open.

[0083] The spacing between each pair of adjacent air guides 9' or 90' and 91' further defines the flow cross-section of the throttling element. In this example, the spacing between the outer surface of the first sub-side 902' and the outer surface in the region at the corner of the L-shaped element 91' defines the region of the narrowest flow cross-section 8. This region is linear and extends from the outer end of the air guide 9' to the inner ring or protrusion 12. This region, as in the first example, corresponds to the annular surface interrupted by the air guide 9', which extends perpendicular to the longitudinal central axis L of the throttling element.

[0084] The hook-shaped element 90' can be constructed as a single piece or in multiple pieces. It is fixed or formed on one or more parts of the throttling element.

[0085] The L-shaped element 91' is also constructed as a single piece or in multiple pieces. It is fixed or formed on one or more other parts of the throttling element.

[0086] The portion with the hook-shaped element 90' is rotatable or pivotable relative to the portion with the L-shaped element 91' about the longitudinal central axis L of the throttling element, or vice versa. If elements 90' and 91' are each fixed at multiple locations, they together are rotatable or pivotable as a group. All portions or subassemblies are also rotatable or pivotable.

[0087] By rotating or pivoting the elements 90' and 91' relative to each other, the short side 900' of the hook-shaped element 90' moves relative to the short side 910' of the L-shaped element 91'. The shape of the air guide 9' and the spacing between adjacent air guides 9' change. As in the example above, however, the location of the minimum flow cross section 8 remains unchanged.

[0088] The throttling element according to the invention can achieve the adjustment of a constant air volume flow rate and the change of the free flow cross section, wherein the narrowest part of the flow cross section remains unchanged in different adjustment positions.

[0089] List of reference numerals Part 1 10 First Shell 101 First stop joint 11 First blade 111 First Wall 112 Second Wall 110 recess 12 protrusions 120 hub 121 Connector 122 recess 123 steps Part 2 20 First outer ring 200 recess 201 First Handle 21 First air guide element 210 recess 211 First side 212 Second side 213 Arc-shaped part 22 First inner ring 222 recess 3 Part Three 30 Second outer ring 300 connector board 301 Second handle 31 Second air guide element 310 connector board 311 First side 312 Second side 313 Arc-shaped part 32 Second inner ring 320 connector 4. Part Four 40 Second shell 401 Second stop plate 41 Second blade 410 recess 411 First Wall 412 Second Wall 42 protrusions 42' Rear Section 420 hub 421 connector 422 concavity 423 steps 5 sensors 6 motors 60 Transmission device 7. Ventilation duct 8. The region with the narrowest flow cross-section 80 Free flow cross section 9. Air guide body 90 Partial Ellipsoid 91 U-shaped components 910 side 911 stitching 9' Air guide body 90' hook-shaped element 900' short side 901' curved section 902' First part side 903' Second Part Side 91' L-shaped element 910' Short Side 911' Long Side H cavity L longitudinal centerline Q is the longitudinal centerline.

Claims

1. A device for regulating air volumetric flow rate in an air distribution network, wherein the device has air guides extending radially and distributed around a longitudinal central axis of the device, wherein air channels are formed between adjacent air guides, and wherein the opening cross-section of the air channels is adjustable. Each air guide is formed by a first air guide unit and a second air guide unit, wherein the first air guide unit is rotatable relative to the second air guide unit about the longitudinal central axis of the device, wherein the opening cross-section of the air passage can be changed by the rotation of the first air guide unit relative to the second air guide unit, and wherein the first air guide unit and the second air guide unit are configured such that the air guide formed by the first air guide unit and the second air guide unit has a closed and curved surface at least on the airflow side, wherein the first air guide unit has a cross-section of a portion of an ellipse, and wherein the first air guide unit has an opening, the cross-section of which forms an opening in the ellipse, wherein the second air guide unit has a U-shaped cross-section, the U-shaped cross-section having two sides and a tab connecting the two sides, wherein the two sides engage with the opening of the first air guide unit at their free ends, and wherein the size of the engagement between the two sides and the opening can be changed by the relative rotation of the first air guide unit and the second air guide unit.

2. The apparatus according to claim 1, The first air guide unit is rotatable relative to the second air guide unit, such that in each relative rotational position of the first air guide unit, the minimum opening cross-section remains at the same location relative to the longitudinal central axis of the device.

3. The apparatus according to claim 1 or 2, All of the first air guide units are able to rotate together relative to the second air guide unit.

4. The apparatus according to claim 1 or 2, All of the air guides have the same external shape and the same external dimensions.

5. The apparatus according to claim 1 or 2, The air guide is arranged symmetrically about the longitudinal central axis of the device.

6. The apparatus according to claim 1 or 2, The air guide is arranged radially around an ellipsoidal central protrusion.

7. The apparatus according to claim 1 or 2, The tab is formed by bending outwards, and the outermost line of the tab is centered between the two sides.

8. The apparatus according to claim 7, The outermost line of the tab of one of the air guides and the outermost line of the first air guide unit of the adjacent air guide extend on a common annular surface that extends perpendicular to the longitudinal central axis of the device, wherein the position of the common annular surface relative to the longitudinal central axis of the device remains unchanged when the first air guide unit of the two adjacent air guides rotates relative to the corresponding second air guide unit.

9. The apparatus according to claim 1 or 2, The second air guide unit is composed of a first blade and a second blade, wherein all the first blades are disposed in a common first part and all the second blades are disposed in a common second part, wherein the common first part and the common second part are configured to be interlocked, wherein the common first part and the common second part, in the interlocked state, accommodate a first air guide unit that is rotatable relative to the common first part and the common second part.

10. The apparatus according to claim 1 or 2, Each of the first air guide units comprises a first air guide element and a second air guide element, wherein all the first air guide elements are disposed in a common first part, and all the second air guide elements are disposed in a common second part, wherein the common first part and the common second part are configured to be interlocked to form a common rotatable part.

11. The apparatus according to claim 1 or 2, The device is configured in a mirror-symmetrical manner in the assembled state.

12. The apparatus according to claim 1 or 2, A sensor for determining the flow velocity is installed in the area of ​​the rotor blade-shaped air guide.

13. An apparatus for regulating the volumetric flow rate of air in an air distribution network, wherein the apparatus has air guides extending radially and distributed around a longitudinal central axis of the apparatus, wherein air channels are formed between adjacent air guides, and wherein the opening cross-section of the air channels is adjustable. Each air guide is formed by a first air guide unit and a second air guide unit, wherein the first air guide unit is rotatable relative to the second air guide unit about the longitudinal central axis of the device, wherein the opening cross-section of the air passage can be changed by the rotation of the first air guide unit relative to the second air guide unit, and wherein the first air guide unit and the second air guide unit are configured such that the air guide formed by the first air guide unit and the second air guide unit has a closed and curved surface at least on the airflow side, wherein the first air guide unit has a hook-shaped cross-section having a short side, a long side and a rounded arc portion, wherein the second air guide unit has an L-shaped cross-section having a short side, a long side and a rounded arc portion of less than 90° connecting the two sides, wherein the short side of the first air guide unit is placed on the short side of the second air guide unit, and the short side of the first air guide unit is movable when rotating relative to the short side of the second air guide unit, thereby changing the distance from the adjacent air guide.

14. The apparatus according to claim 13, The first air guide unit is rotatable relative to the second air guide unit, such that in each relative rotational position of the first air guide unit, the minimum opening cross-section remains at the same location relative to the longitudinal central axis of the device.

15. The apparatus according to claim 13 or 14, All of the first air guide units are able to rotate together relative to the second air guide unit.

16. The apparatus according to claim 13 or 14, All air guides are formed by a first air guide unit and a second air guide unit.

17. The apparatus according to claim 13 or 14, All of the air guides have the same external shape and the same external dimensions.

18. The apparatus according to claim 13 or 14, The air guide is arranged symmetrically about the longitudinal central axis of the device.

19. The apparatus according to claim 13 or 14, The air guide is arranged radially around an ellipsoidal central protrusion.

20. The apparatus according to claim 13 or 14, A sensor for determining the flow velocity is installed in the area of ​​the rotor blade-shaped air guide.

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