Device for controlling an air volumetric flow

Abstract

The invention relates to a device for regulating an air volume flow, in particular in an air distribution network, comprising a central air duct through which air can flow and a throttle valve arranged in the central air duct. The size of the cross-section of the air duct through which the flow can flow can be changed by means of a throttle valve (6), wherein the throttle valve (6) has an adjusting mechanism for changing the cross-section through which the flow can flow. In addition to the throttle valve (6), the device has a central flow element (3) which is arranged in the air channel and which has an outer side (30), the circumference of which increases away from the throttle valve (6). When the device is installed in the wall opening (10), the adjusting mechanism (4, 612) can be actuated. This enables optimal fine adjustment of the device.

Description

Technical Field

[0001] The invention relates to a device for regulating an air volume flow, in particular an inlet valve and / or an outlet valve. Background Art

[0002] Air distribution networks are used, in particular, in buildings for ventilation and exhaust air and partly for air conditioning of rooms. Controlled residential and office ventilation installations are now well-established systems which use central or decentralized ventilation devices.

[0003] Wall, ceiling or floor openings in buildings have air ducts with inserts, which are connected to an air distribution network. Such air ducts change the shape of the air flow and / or regulate the air volume flow. Depending on the direction of the flow into or out of the room, the air ducts are called inlet valves or outlet valves. The air ducts limit the cross section in the air duct, wherein the size of the restriction can be selected with the aid of a throttle valve.

[0004] Unfortunately, such inlet or outlet valves are usually not adjustable in the installed state or can only be adjusted with relatively great effort. Another disadvantage is that, depending on the degree of adjustment of the valve, the individual components of the valve extend to different distances into the room, protrude from the building wall and impair the visual appearance of the room.

[0005] Inlet valves, i.e. valves through which air flows into the room, also generally have the disadvantage that they distribute the outflowing air unevenly. People who are sitting or lying down and are directly exposed to the outflowing air may find this uncomfortable. In addition, this results in streaks of dirt accumulation that are more clearly visible than a uniform accumulation. The uneven outflow behavior also causes increased noise generation.

[0006] Another disadvantage is that the exhaust valve, ie the valve through which the air flows out of the room, usually has a different shape than the intake valve. This results in a rather uneasy appearance in the room.

[0007] WO 2022 / 101056 A1 discloses an air volume throttle valve having an air guide body in the form of a rotor blade. The air guide body is formed by a first air guide unit and a second air guide unit, respectively, which can be twisted relative to each other so that the spacing between the air guide bodies can be changed, thereby changing the flow-through cross section of the air channel. The device achieves a change in the free flow cross section while keeping the location of the narrowest flow cross section unchanged. This makes it easier to adjust the valve. Summary of the invention

[0008] The object of the invention is to achieve an optimized controllability of the volume flow.

[0009] The device having the features according to the invention achieves this object.

[0010] The device according to the invention for regulating the volume flow of air, in particular in an air distribution network, comprises an air channel through which flow can flow and a throttle valve arranged in the air channel. The size of the cross section through which flow can flow can be changed by means of the throttle valve. The throttle valve has an adjustment mechanism for changing the cross section through which flow can flow. In addition to the throttle valve, the device comprises a flow element, which is arranged in the air channel and has an outer side whose circumference increases away from the throttle valve. The adjustment mechanism can be actuated when the device is installed in a wall opening.

[0011] The air channel is preferably a central air channel and the flow element is preferably a central flow element.

[0012] The adjusting mechanism preferably enables manual or only manual variation of the throttle valve setting. The respective positions are preferably fixedly held, for example by means of a latching device.

[0013] Since the throttle valve can be adjusted with the valve installed, it can be checked during adjustment whether the desired air volume flow is achieved and whether the acoustic properties of the valve are acceptable with regard to living comfort.

[0014] In the installed state of the device, the flow element is preferably located on the side of the throttle valve facing the building interior, ie in the case of an air inlet valve downstream of the throttle valve in the flow direction. The flow element ensures an optimal flow distribution in the building interior.

[0015] In one embodiment, the flow element can be removed and reinstalled in order to provide access to the adjustment mechanism when the device is installed in a wall opening. Preferably, the flow element can be releasably fastened to the remaining device without tools, for example by means of a snap-on closure or a bayonet closure.

[0016] Alternatively or additionally, the flow element has a through-opening which enables access to the adjusting mechanism. This has the advantage that the flow element does not have to be disassembled.

[0017] In one embodiment, the through opening is arranged centrally. This is optimal for a centrally supported throttle disc or throttle body. In another embodiment, the through opening is arranged in a distributed manner in the outer side of the flow element. This is particularly suitable for a distributedly supported throttle disc or throttle body.

[0018] The flow element is preferably designed to be open on its side facing away from the throttle valve. Preferably, the opening is closed by means of a cover. The cover can preferably be mounted and removed without tools in order to provide access to the through-opening and / or the adjusting mechanism. Preferably, the cover is held on the flow element by means of magnets. The cover can also be detachably arranged on the flow element, for example, by means of clamping or latching elements. The cover optimizes the appearance of the valve in the interior of a building. In addition, the cavity closed by means of the cover can be used to arrange other elements, for example for sensors or actuators.

[0019] In a preferred embodiment, the throttle valve has at least one first throttle valve part with a first blocking element and a second throttle valve part with a second blocking element. The position of the second blocking element can be changed relative to the first blocking element in order to change the size of the cross section through which flow can flow. Preferably, the outer side of the flow element is arranged spaced apart from the first blocking element and / or the second blocking element in the flow direction.

[0020] In a preferred embodiment, the second throttle valve part is supported in a guided manner at its circumference. This enables fine adjustment of the throttle valve, especially when the adjustment mechanism is arranged in a distributed manner, especially at the circumference of the second throttle valve part. Preferably, the second throttle valve part is rotatable, wherein the adjustment mechanism is arranged in a distributed manner.

[0021] Fine adjustment is also optimized if the second throttle valve element is mounted centrally, but the adjusting means are arranged distributed, in particular distributed around the circumference of the second throttle valve element.

[0022] In a preferred embodiment, the second throttle valve element is unguided and unsupported in the central region. This allows the formation of an expanded flow-through cross section of the throttle valve and prevents a sharp gap opening with undesirable acoustic properties.

[0023] The adjusting mechanism can be constructed in different ways and methods. Preferably, the adjusting mechanism has a toothed portion and a gear engaged with the toothed portion. The gear is preferably the head of a rotating pin, and the toothed portion is preferably arranged at the second throttle valve component. Other transmission mechanisms can also be used.

[0024] If a rotating pin is used, it preferably has a pin portion which can be contacted through a through-opening of the flow element so that the gear is rotated along the toothing by rotation of the pin portion. Alternatively, the rotating pin can protrude through the through-opening.

[0025] Preferably, the pin has a receiving opening for receiving a tool. Alternatively or additionally, the pin preferably has an outer surface for non-slip contact with the aid of a tool and / or by hand, for example a knurling.

[0026] In addition to the through opening, the outer side of the flow element is preferably designed to be closed upwards. As a result, the air flow is guided outwards from the throttle valve along the flow body and cannot pass through the flow body.

[0027] The flow element is preferably designed in one piece. The same applies to the first throttle valve part and the second throttle valve part and, if present, to the third throttle valve part. The third throttle valve part is preferably the part of the housing of the valve at or in which the remaining parts of the throttle valve and the flow element are arranged.

[0028] The flow element preferably has a bell-shaped shape with a cross section widening away from the throttle valve and an outer side that is curved inwards. This shape optimizes the uniform outflow of the air volume flow.

[0029] Preferably, the flow element has, at its end facing away from the throttle valve, an outflow edge that is curved toward the throttle valve. This likewise optimizes the outflow characteristics of the air volume flow.

[0030] If the outer side is arranged to be spaced apart from the first throttle valve part and the second throttle valve part and, if present, to be spaced apart from the third throttle valve part, it is possible to form an air volume flow that remains the same downstream of the throttle valve and the visual appearance of the device in the interior space of the building does not change when the throttle valve setting is changed.

[0031] Preferably, the device for regulating the air volume flow in particular in the air distribution network has an air channel through which flow can flow. The air channel defines a longitudinal center axis and a radial direction. The device has a throttle valve arranged in the air channel, wherein the throttle valve has at least one first throttle valve component with a first blocking element and a second throttle valve component with a second blocking element. The position of the second blocking element can be changed relative to the first blocking element so as to change the size of the cross section through which flow can flow in the air channel. The minimum size of the cross section through which flow can flow is realized in the first end position of the second blocking element relative to the first blocking element, and the maximum size of the cross section through which flow can flow is realized in the second end position. Preferably, the first blocking element and the second blocking element are configured so that the first blocking element and the second blocking element constitute a part of the cross section through which flow can flow in almost every radial direction in almost all positions between the first end position and the second end position, wherein the cross section through which flow can flow is widened toward the longitudinal center axis in at least a part of the position between the first end position and the second end position.

[0032] Therefore, preferably, in almost every setting of the throttle valve, there is a cross section through which flow can flow in every radial direction. This is in contrast to known blocking elements with fan-shaped blade shapes, which do not realize a through-flow region within the blocked fan.

[0033] The distribution of the cross-sectional area through which the flow can pass is changed compared to the prior art to homogenize the outflow characteristics. The distribution can be achieved, for example, by distorting the shape of known blocking elements, in particular throttle blades. For example, the known fan-shaped shape can be bent until an arcuate shape is produced. This can be achieved in Fig.14 and Fig.15 However, other types of distortion are also possible, for example by introducing lateral recesses and / or through-holes into the blocking element.

[0034] Since the cross section through which the flow can flow widens towards the longitudinal center axis, small outflow angles are avoided. Since no gap flow occurs as a result, the acoustic properties are improved. The noise load is minimized. The cross section through which the flow can flow usually ends at a distance from the longitudinal center axis.

[0035] The widening of the cross section through which flow can flow can occur continuously or stepwise from the outer circumference of the throttle valve toward the longitudinal center axis. Preferably, however, this only relates to the inner region. This means that there may also be a taper radially outward in the cross section through which flow can flow. Preferably, the cross section through which flow can flow first tapers toward the longitudinal center axis and then widens in at least a portion of the position between the first end position and the second end position.

[0036] Preferably, the cross section through which flow can flow constitutes a plurality of L-shaped areas divided by the first blocking element and the second blocking element in at least a portion of the position between the first end position and the second end position. The short sides of the L-shaped area preferably constitute a widened through-flow area near the longitudinal center axis.

[0037] The L-shape achieves an optimal outflow characteristic due to the avoidance of small angles. Furthermore, the L-shape can be realized in a simple manner.

[0038] At least the long side of the L-shaped region is preferably formed in a curved manner. In some embodiments, the transition between the long side and the short side of the L-shaped region is formed in a rounded manner.

[0039] In the case of the device being installed in a wall opening, the position of the blocking element can preferably be varied. This makes it easy to adjust the air flow desired for living comfort.

[0040] According to an embodiment, the blocking element can be moved in a motor-driven manner, for example depending on a sensor value and / or by triggering a motor remotely.Preferably, however, the blocking element can be adjusted mechanically manually.

[0041] The first blocking element and the second blocking element can be designed differently. Preferably, the first blocking element and the second blocking element can be rotated or at least pivoted relative to each other. Preferably, the first blocking element and the second blocking element are blades designed to be curved in the radial direction.

[0042] The first blocking element is preferably a blade extending away from the longitudinal center axis to a free end. The end is alternatively connected to an outer circumferential ring. Preferably, the first blocking element terminates in a common area in the area of ​​the longitudinal center axis, which is referred to as a central blocking core component.

[0043] The second blocking element is preferably a blade extending from the common outer circumferential ring toward the longitudinal center axis, but terminating freely at a distance from the longitudinal center axis. Thus, the second blocking element forms a free end in the region of the longitudinal center axis.

[0044] The widening of the cross section through which the flow can flow can be obtained in different ways and methods by corresponding designs of the first blocking means and / or the second blocking means. In a preferred embodiment, the free end of the second blocking element is arranged around a central free area, the cross section of which is larger than the cross section of the central blocking intermediate part. As a result, there is an annular free area, which is only partially covered by the first blocking element. The areas evenly distributed on the inner circumference prevent gap flows and optimize uniform outflow.

[0045] The second blocking element is preferably designed to be flat. This facilitates a relative position change, for example a rotation of the second throttle valve component.

[0046] In a preferred embodiment, the second blocking element is a part of the throttle disk or the throttle body which is rotatably supported at its circumference. The part can be designed to be centrally open in the manner described, so that the widened area can be realized in a simple manner.

[0047] If the first barrier element forms a curved flow surface, the flow properties can be additionally optimized, in particular the pressure losses can be minimized.

[0048] In a simple embodiment, the throttle valve is formed by a first throttle valve part and a second throttle valve part. In another embodiment, the device has a third throttle valve part with a third blocking element, which is arranged to overlap the first blocking element. The second blocking element is arranged between the first blocking element and the third blocking element and can move relative to the first blocking element and the third blocking element. This achieves a further improvement in the flow characteristics. In addition, the embodiment can be optimally used as an inlet valve and an exhaust valve, i.e., for two flow directions of the air distribution network.

[0049] If the third barrier element forms a curved outflow surface, the flow properties are optimized and in particular the pressure losses are minimized.

[0050] In a preferred embodiment, the first throttle valve element and, if present, the third throttle valve element are designed to be rotationally fixed and the second throttle valve element is designed to be rotatable about the longitudinal center axis. In other embodiments, other of the components are rotationally fixed or movable or rotatable.

[0051] If the device has a housing designed for reception in a wall opening, in particular designed for clamping and / or sealing reception, installation in the wall opening can be facilitated. Preferably, a corresponding sealing and / or clamping ring is provided on the circumference of the housing.

[0052] In a preferred embodiment, there is also an internal flow element. The flow element has an outer side, which is arranged at a distance from the first throttle valve component and the second throttle valve component, and if present, is arranged at a distance from the third throttle valve component. The outer side has a circumference, which increases away from the throttle valve. The separation of the internal flow element and the throttle valve realizes the adjustment of the throttle valve without changing the visual appearance of the air inlet valve or the exhaust valve in the room of the building. The lowermost part of the valve always extends into the room at the same distance. Thus, the valve can be adjusted differently with respect to the air volume flowing through, wherein the valve still obtains a uniform appearance in the room despite this. The flow element is preferably bell-shaped. If the air channel between the lower side of the throttle valve and the outer side of the flow element is preferably mostly curved and if the air channel is guided into the room almost parallel to the cover surface, the flow characteristics are additionally improved.

[0053] Preferably, the inner flow element also enables access to the adjusting mechanism of the throttle valve in the installed state of the device. The access can be closed, for example, by means of a removable and reinstallable cover.

[0054] Alternatively, the flow element can be removed in a simple manner in order to gain access to the adjusting mechanism of the throttle valve. Preferably, the flow element can be fastened to the housing or the throttle valve by means of a latching closure or a bayonet closure.

[0055] Preferably, when the setting of the throttle valve is changed, the position of the flow element relative to the housing or relative to the wall surface does not change. Likewise, when the setting of the throttle valve is changed, the cross section of the outlet channel or the outlet opening of the air channel preferably does not change.

[0056] Other implementations are described in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Preferred embodiments of the present invention are described below with reference to the accompanying drawings, which are only used for illustration and should not be interpreted as limiting. In the accompanying drawings:

[0058] Figure 1A longitudinal section showing a device according to the invention installed in a wall opening;

[0059] Figure 2 Shown from above Figure 1 An exploded view of the device;

[0060] Figure 3 Shown below according to Figure 1 A first exploded view of a device;

[0061] Figure 4 Shown below according to Figure 1 a second exploded view of the device;

[0062] Figure 5 Shown from above Figure 1 A perspective view of the device in a partially closed throttle position;

[0063] Figure 6 Show according to Figure 5 A perspective view of the device in the fully open throttle position.

[0064] Figure 7 The base is shown from below without flow element and cover Figure 1 A stereoscopic view of the device;

[0065] Figure 8 Shown from below without cover Figure 1 A stereoscopic view of the device,

[0066] Fig. 9 Shown from above Figure 1 A view of the device in a partially closed throttle position;

[0067] Fig.10 Shown from above Fig. 9 View of the device in the fully open throttle position.

[0068] Fig.11 A view from above showing the second throttle valve element,

[0069] Fig.12 A view showing the second throttle valve component from below;

[0070] Fig.13 A perspective view showing a second throttle valve component;

[0071] Fig.14 A schematic diagram showing a conventional throttle valve;

[0072] Fig.15 A schematic diagram showing a throttle valve according to the present invention; and

[0073] Fig.16 Shown in accordance with Fig.14 and Fig.15 Graphical representation of the distribution of the blocking surface over the circumference and radius in the case of a throttle valve.

[0074] Identical parts are provided with the same reference numerals. DETAILED DESCRIPTION

[0075] Figure 1 The valve V according to the invention is shown installed in a wall opening 10 of a wall 11. The wall opening 10 is preferably part of an air distribution network of a building. The terms "below" and "above" used in this text relate to the installation position of the valve in the wall opening of the ceiling of the building. If the wall opening is in another wall of the building, the terms should be interpreted accordingly.

[0076] The valve V is an exhaust valve which conducts air from a room of a building into the wall opening 10 or it is an intake valve which introduces air from an air distribution network through a wall opening into a room of a building.

[0077] The valve V is described below as an inlet valve, wherein the valve is designed identically with respect to its function as an outlet valve.

[0078] As in Figures 2 to 4 As can be clearly seen in FIG. 1 , the valve V has a housing 2 , an inner flow element 3 , a rotary pin 4 , a cover 5 and a throttle valve 6 .

[0079] The housing 2 is preferably constructed in two parts. The housing preferably has a circular cross section. The first housing part 20 has a hollow cylindrical base body 200, the lowermost end of which forms a flange 201 protruding radially outward. The valve V is placed against the building wall 11 by means of the flange 201, such as at Figure 1 The first flange 201 is preferably rigid and serves as a stop when the valve V is pushed into the wall opening 10, as in Figure 1 The first flange forms a stop for covering irregularities in the surrounding wall 11 .

[0080] The base body 200 has a first step 202 and a second step 203 on its outer circumference. The circumferential upper end face 204 is preferably flat and has a recess 205 for passing the rotary pin 4 therethrough.

[0081] In the upper region of the first housing part 20 , a third throttle element 22 is formed, which is described below together with a first throttle element 60 and a second throttle element 61 of the throttle valve 6 .

[0082] The second housing part 21 has a narrow, hollow cylindrical or annular base body 210. The base body is surrounded by a radially protruding second flange 211. The second flange 211 is preferably designed as a flexible sealing and / or clamping ring. The second flange serves to seal the valve V and to releasably fasten the valve in the wall opening 10, such as in Figure 1 As can be seen in . For this purpose, the wall opening 10 preferably has a circular cross section. The second flange 211 can be sprayed, molded in one piece or connected to the second base body 210 in other ways and methods.

[0083] The second housing part 21 surrounds the upper region of the first housing part 20 . The second housing part rests on the first step 202 and preferably extends as far as the second step 203 .

[0084] The housing 2 encloses a central air duct which defines a longitudinal center axis L and a radial direction.

[0085] An internal flow element 3 is arranged in the housing 2, which extends downwards towards the interior of the building, such as in Figure 1 As can be seen in FIG. The inner flow element 3 is preferably hollow and can be closed off from the bottom by means of a cover 5 . The flow element 3 is designed to be closed at the top except for the through-opening 33 for passing the rotary pin 4 .

[0086] The flow element 3 is preferably designed to be essentially rotationally symmetrical. It has a bell-shaped shape with a cross section that widens downward and an outer side 30 that is curved inwardly. The flow element 3 preferably extends up to the outer edge of the first flange 201 or extends beyond the outer edge.

[0087] The flow element 3 is held fixedly in the first housing part 20, preferably by means of a bayonet closure or another detachable and reestablishable connection. The coupling element is preferably arranged in the region of the longitudinal center axis L. Figure 2 2 and 3. The second coupling element 220 of the first housing part 20 and the matching coupling element 34 of the flow element 3 can be clearly seen in FIG. The coupling element is a plug-and-screw connection in the form of a bayonet closure.

[0088] As in Figure 1As can be seen in the figure, a flow channel, here called air channel 8, is formed between the first housing part 20 and the flow element 3. The air channel leads from the wall opening 10 through the throttle valve 6 and through the annular gap between the first flange 201 and the outer side 30 of the flow element 3 into the building interior. Regardless of the adjustability of the throttle valve 6 described below in this article, the gap is usually always the same size. Therefore, even when the adjustment of the throttle valve 6 is changed, and thus when the cross section through which the throttle valve 6 can flow changes, the outflow cross section of the valve V remains the same.

[0089] The upwardly curved outflow edge 31 of the flow element 3 together with the first flange 201 which is also inclined upward optimizes the outflow characteristics, such as in Figure 1 As can be seen in .

[0090] The flow element 3 has a circumferential annular edge which forms a flat lower end face 32, against which the cover 5 rests. The annular edge surrounds an inlet opening which leads into the hollow interior. The cover 5 has a base plate 50 with a preferably flat lower end face 51. The cover can preferably be placed on the flow element 3 and removed from it without tools. For this purpose, magnets are provided in both components. Figure 1 The magnet of the flow element 3 can be seen in FIG. The magnet is provided with reference numeral 35. Figure 2 and Figure 4 The magnet of the cover 5 can be seen in FIG.

[0091] The flow element 3 is preferably arranged in a stationary manner relative to the housing 2 and is preferably not adjustable at least in the direction of the longitudinal center axis L, ie not axially adjustable.

[0092] A throttle valve 6 is arranged in the upper region of the valve V. The throttle valve has an adjustable element for selectively narrowing the central air channel. The throttle valve thus has a variable cross section which determines the air flow that can flow through the central air channel. The variable cross section determined by the throttle valve 6 is referred to herein as the flow-through cross section.

[0093] Downstream of the throttle valve 6 in the flow direction, i.e. towards the building interior, the cross section of the central air channel is preferably no longer adjustable. However, the cross section is not necessarily the same size everywhere. The downstream cross section is preferably formed by the spacing between the preferably inwardly curved inner wall of the housing 2 and the outer side 30 of the flow element 3.

[0094] In the embodiment, the throttle valve 6 is composed of three components. The first throttle valve component 60 is connected to the housing 2 and / or the third throttle valve component 22 in a rotationally fixed manner. The third throttle valve component 22 is formed in one piece with the housing 2 and is also rotationally fixed with respect to the first throttle valve component 60. The second throttle valve component 61 is arranged between the first throttle valve component 60 and the third throttle valve component 22 and can be pivoted or rotated about the longitudinal center axis L.

[0095] In other embodiments, the third throttle valve component 22 is also an independent component preferably connected to the housing 2 in a rotationally fixed manner. In other embodiments, there are only the first throttle valve component 60 and the second throttle valve component 61, but no third throttle valve component 22, or there are only the second throttle valve component 61 and the third throttle valve component 22, but no first throttle valve component 60. If there are only two throttle valve components, the second throttle valve component 61 is also preferably configured with an optimized configuration of its upstream surface or downstream surface.

[0096] The first throttle valve part 60 has a blocking element in the form of a rotor-like first blade 601, which extends outwardly from a common central part. The central part forms the first coupling element 600. In the example, there are five first blades 601. However, three, four, six or other number of blades may also be used.

[0097] A hook or flange 602 is molded at the end side of the free end of the first blade 601. The hook or flange is used to mount an exhaust filter and / or a cover. The hook or flange is placed, for example, on the upper end face of the second throttle valve component 61. This Figure 1 , Figure 5 and Figure 6 It can be clearly seen in.

[0098] The first blade 601 widens toward its free end. Preferably, all blades 601 are identically shaped and equally large. The first blade 601 is designed to be curved in the radial direction. Preferably, the surface exposed between two blades 601 corresponds to the surface of the blade 601 .

[0099] The upper flow surface of the first blade 601 is preferably designed to be curved, so that an aerodynamically favorable body is formed.

[0100] The third throttle valve part 22 has a blocking element in the form of a third blade 221, which forms a geometric counterpart to the first blade 601. Therefore, in the example described, the third blade is also curved in the radial direction. The third blade 221 does not end freely, but the peripheral end of the third blade is molded on the inner wall of the first housing part 20. The central end of the third blade transitions into the central part formed by the second coupling element 220 in one piece.

[0101] The first coupling element 600 has a hook 603 protruding downwards, which engages in a receiving opening of the second coupling element 220. In the manner described, the first throttle element 60 is connected to the third throttle element 22 and also to the housing 2 in a rotationally fixed manner.

[0102] In the case of the assembled valve V, the first blade 601 and the third blade 221 are aligned with each other. The first blade 601 and the third blade 221 overlap each other. Preferably, the free surface of the third blade 221 is also curved. Therefore, the outflow surface is also optimized in terms of aerodynamics. Preferably, the flow surfaces of the first blade 601 and the third blade 221 are curved in the same way, so that the valve V forms the same flow surface and outflow surface, so that it can be used for intake and exhaust in the same way.

[0103] The second throttle valve component 61 located therebetween has an outer ring 610. An inwardly projecting blocking element in the form of a second blade 611 is molded at the upper end of the ring 610. The outer ring 610 rests with its free lower end of the outer side on the second step 203 of the housing 2. The outer ring also rests with its inwardly projecting circumferential upper edge on the upper end face 204 of the housing 2. This is Figure 1 , Figure 2 , Figure 3 and Figure 4 It can be clearly seen in.

[0104] The ring 610 and thus the second throttle element 61 are rotatable about the longitudinal center axis L, wherein the second throttle element is guided during the rotation by the base body 210 of the second housing part 21 and is fixed in its axial position by the collar 602 of the first throttle element 60 .

[0105] The second blade 611 of the second coupling part 61 ends freely toward the longitudinal center axis L. The second blade is also curved, wherein the second blade preferably has the same bending radius as the first blade 601 and the third blade 221. The number of second blades 611 is preferably the same as the number of first blades 601 and the third blade 221. The second blade 611 can be flat. Other configurations are possible.

[0106] Thus, the second throttle disc 61 forms a flat disc with a surrounding guiding outer side, wherein the disc is arranged between the flat end faces of the first blade 601 and the third blade 221 and can rotate relative to them. The rotation is preferably continuous. In other embodiments, the rotation is stepwise. In all cases, preferably there is an optical, tactile and / or acoustic mechanism to show the user that the throttle disc 61 has reached a discrete position. In addition, such a mechanism prevents unintentional adjustment.

[0107] The rotation of the throttle disk 61 serves to adjust the valve V. The rotation is preferably carried out manually. Alternatively or additionally, however, the rotation can also be carried out by motor drive.

[0108] The adjustment can preferably also be performed when the valve V is already installed in the wall opening 10. In a simple embodiment, this can be performed by removing the flow element 3 and the cover 5. In a preferred embodiment shown here by way of example, only the cover 5 is removed, if any. The through-opening 33 in the outer side 30 of the flow element 3 enables access to the adjustment element, here the rotating pin 4. This is done in Figures 1 to 4 as well as Figure 7 and Figure 8 It can be clearly seen in.

[0109] The rotating pin 4 has a pin portion 40, a head 41 configured as a gear, and a knurling 42 at the circumference of the free end of the pin portion 40. The knurling 42 increases the grip when the rotating pin 4 is rotated by hand without using other tools. Figure 7 and Figure 8 As shown in , there is preferably a tool 9 which can be inserted around or into the pin 40. Depending on the embodiment, the pin 40 is formed with a hexagon socket, a slot, a cross slot or a Pozidriv portion so as to be rotated by means of a correspondingly shaped pin-shaped tool 9.

[0110] The rotation pin 4 passes through the recess 205 of the first housing part 20, as shown in Figure 1 and Figure 2 Here, the head 41 is placed on the first housing part 20.

[0111] The second throttle valve member 61 has a toothing 612 in the area of ​​its inner circumference. The gear of the head 41 engages in the toothing 612 due to the recess 205. By rotating the rotating pin 4, the second throttle valve member 61 can be rotated around the longitudinal center axis L. Therefore, the position of the second blade 611 relative to the first blade 601 and the third blade 221 can be manually adjusted.

[0112] Preferably, the first housing part 20 has a scale 222 next to the recess, which interacts with the reference 614 of the second throttle valve part 61. This allows the adjustment of the throttle valve to be noted and the rotational position of the blades relative to each other to be recognized. This can be done in Figure 2 and Figure 3 It can be seen in.

[0113] exist Figure 7 4 shows how the tool 9 can be introduced into the rotating pin 4. For this purpose, it is usually not necessary to remove the flow element 3, because as in Figure 8As can be seen in FIG. 1 , the flow element 3 preferably has through-openings 33 at suitable locations.

[0114] Preferably, however, the flow element 3 can be easily removed and fastened again. For example, by means of a bayonet closure. In this case, the rotation pin 4 can be exposed in a simple manner. The knurling 42 enables the rotation of the rotation pin 4 by hand without the need for tools.

[0115] Due to the transmission ratio, the rotary pin allows very fine adjustment of the throttle valve 6 , in particular when rotating it using a tool, but also when adjusting it by hand without a tool.

[0116] There is preferably a locking of the second throttle valve element 61 , ie the throttle valve disk, and the rotary pin 4 . As a result, the selected rotational position of the throttle valve disk is permanently set.

[0117] Other types of adjustment of different positions of the throttle valve disk 61 are possible.

[0118] The specific shape of the blades of the throttle valve 6 ensures that there are closed and open regions in almost every throttle position and on almost every radius of the throttle valve 6. At most the maximum closed state of the throttle valve 6 and possibly also the maximum open state of the throttle valve 6 form an exception.

[0119] In this context, maximum does not mean that all the intermediate spaces between the first blade 601 or the third blade 221 are completely open or closed. It only represents two extreme positions possible for the corresponding throttle valve. However, preferably, the end position corresponds to the complete closure and complete opening of the intermediate space between the first blade 601 or the third blade 221.

[0120] The cross section of the second blade 611 of the throttle valve disc 61 preferably corresponds to the surface of the first blade 601 and the third blade 221. As a result, the through opening of the throttle valve 6 formed by the corresponding spacing of the first blade 601 or the third blade 221 can be completely closed and completely opened. Fig. 9 A partially closed throttle valve 6 is shown in FIG. 1 , which can be further closed. Fig.10 6. The maximum end position in the closing direction is not shown. In the end position, the throttle valve 6 is completely closed.

[0121] The above-mentioned specific distribution of the open and closed regions in the respective throttle valve setting is achieved by the curved shape of the individual blades 601 , 221 , 611 .

[0122] Furthermore, the second blade 611 forms a central through-opening 613 around the longitudinal center axis L. Figures 11 to 13The central through-opening 613 is penetrated by the hook 603. However, the central through-opening is larger than the cross-section of the first coupling element 600 and the second coupling element 220. This causes the flow-through region of the throttle valve 6 to widen toward the longitudinal center axis L.

[0123] The shape of the free end of the second blade 611 is preferably shaped such that it matches the shape of the first coupling element 600 of the first throttle valve component 60 and completely closes the widened region in the end position of the throttle valve.

[0124] As in Fig. 9 As can be clearly seen in FIG. 1 , the cross-section of the partially opened throttle valve 6 through which flow can flow forms regions separated from one another, wherein each of the regions has an L-shape. The long sides of the L-shape are curved here. The short sides of the L-shape are preferably also slightly curved. Preferably, the transition from the long side to the short side is curved. The transition preferably forms an angle greater than 90°.

[0125] For realizing the present invention, the L-shape is preferred, but not absolutely necessary.

[0126] according to Figures 14 to 16 The differences in the design of blades 601 , 221 , 611 of throttle valve 6 according to the invention compared to known blades can be explained.

[0127] Fig.14 A known embodiment is shown. The blades are fan-shaped. The cross represents the flow-through region when the throttle valve is fully open. The dashed lines represent some radii. As can be easily seen, there are radii that are completely in the flow-through region and radii that are completely in the closed region.

[0128] Fig.15 A throttle valve with curved blades is shown. Here, too, the cross represents the area through which flow can flow, and the dashed lines represent some radii. The curved blades cause all or almost all radii to extend not only in the area through which flow can flow, but also in the area through which flow does not flow, i.e., in a closed area.

[0129] As per Fig.16 As shown in the graph, according to Fig.14 Compared with the throttle valve, Fig.15 For a throttle valve with a throttle, the overall barrier is more continuous over the radius. This results in a more optimal flow distribution and prevents extremes in flow velocity.

[0130] The device according to the invention enables an optimal fine adjustment of the device in the installed state.

[0131] Reference numerals list

[0132] 10 Wall openings

[0133] 11 walls

[0134] 2 Shell

[0135] 20 first housing member

[0136] 200 Matrix

[0137] 201 First Flange

[0138] 202 First Step

[0139] 203 Second Step

[0140] 204 upper surface

[0141] 205 Notch

[0142] 21 second housing member

[0143] 210 Matrix

[0144] 211 Second flange

[0145] 22Third throttle valve component

[0146] 220 second coupling element

[0147] 221 Third Leaf

[0148] 222 Scale

[0149] 3 Flow elements

[0150] 30 Outer side

[0151] 31 outflow edge

[0152] 32 lower end surface

[0153] 33Through opening

[0154] 34 coupling element

[0155] 35 Magnets

[0156] 4 Rotation pins

[0157] 40 pins

[0158] 41Head

[0159] 42 Knurling

[0160] 5 Cover

[0161] 50 base plate

[0162] 51 lower end surface

[0163] 52 Magnets

[0164] 6Throttle valve

[0165] 60 first throttle valve component

[0166] 600 first coupling element

[0167] 601 First Blade

[0168] 602 Flange

[0169] 603 Hook

[0170] 61 Second throttle valve component

[0171] 610 Ring

[0172] 611 Second Leaf

[0173] 612 teeth

[0174] 613 Central through opening

[0175] 614 Reference Department

[0176] 8 air channels

[0177] 80 exit openings

[0178] 9 Tools

[0179] V-Valve

[0180] L longitudinal center axis

Claims

1. A device for regulating the air volume flow, in particular in an air distribution network, The device comprises an air duct through which air can flow and a throttle valve (6) arranged in the air duct, wherein the size of the cross section through which air can flow can be varied by means of the throttle valve (6), The throttle valve has an adjusting mechanism for changing the cross section through which flow can flow. It is characterized in that In addition to the throttle valve (6), the device has a flow element (3), which is arranged in the air channel and has an outer side (30) whose circumference increases away from the throttle valve (6), and The adjustment mechanism (4, 612) can be operated when the device is installed in a wall opening (10).

2. The device according to claim 1, wherein the adjustment mechanism (4, 612) can be manually manipulated.

3. The device according to any one of claims 1 or 2, wherein the flow element (3) has a through opening (33) which enables access to the adjustment mechanism (4, 612).

4. The device according to any one of claims 1 to 3, wherein the through-openings (33) are arranged distributedly in the outer side (30) of the flow element (3).

5. The device according to claim 1 , wherein the throttle valve ( 6 ) has at least one first throttle valve part ( 60 ) with a first blocking element ( 601 ) and a second throttle valve part ( 61 ) with a second blocking element ( 611 ), The position of the second blocking element (611) relative to the first blocking element (601) can be changed in order to change the size of the cross section through which flow can flow.

6. The device according to claim 5, wherein the outer side (30) of the flow element (3) is arranged to be spaced apart from the first blocking element (601) and / or the second blocking element (611) in the flow direction.

7. The device according to any one of claims 5 or 6, wherein the second throttle valve member (61) is supported in a guided manner at its circumference.

8. The device according to any one of claims 5 to 7, wherein the second throttle valve element (61) is unguided and unsupported in a central region.

9. The device according to any one of claims 5 to 8, wherein the second throttle valve element (61) is rotatable and wherein the adjustment mechanism (4, 612) is arranged in a decentralized manner.

10. An apparatus according to any one of claims 1 to 9, wherein the adjustment mechanism has a toothed portion (612) and a gear (41) engaged with the toothed portion (612), and wherein the toothed portion (612) is arranged at the second throttle valve member (61) and the gear (41) forms the head of the rotating pin (4).

11. The device according to claim 10, wherein the rotating pin (4) has a pin portion (40) which can pass through the through opening (30) of the flow element (3) to make contact so that the gear (41) is rotated along the toothed portion (612) by rotating the pin portion (40).

12. The device according to any one of claims 1 to 11, wherein the outer side (30) extends at a distance from the inner wall of the housing (2), and wherein the air channel extends in the gap between the outer side (3) and the inner wall of the housing (2).

13. The device according to any one of claims 1 to 12, wherein the flow element (3) is arranged directly or indirectly on the throttle valve (6) in a releasable and refastenable manner in the installed state of the device.

14. The device according to claim 1, wherein the flow element (3) has a bell-shaped design with a cross section widening away from the throttle valve (6) and the outer side (30) being arched inwardly.

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