EP4080131A1 - Control valve, in particular for a ventilation device, method for operating a control valve and ventilation device with a control valve - Google Patents

Abstract

The invention relates to a control valve (2), in particular for a ventilation device (1), with a flow channel (4) formed in a valve housing (5) of the control valve (2), with a valve element (9) in the flow channel (4) for adjustment a flow cross-sectional area of the flow channel (4) is arranged. It is provided that the valve element (9) is axially displaceable with respect to a central longitudinal axis of the flow channel (4) and has a valve seat in a first axial position for setting a first flow cross-sectional area of the flow channel (4) and in a second axial position for setting one of the first second flow cross-sectional area of the flow channel (4) that differs, the valve element (9) being mounted in the valve housing (5) so that it can rotate about an axis of rotation parallel to the longitudinal center axis and is connected to the valve housing (5) via a cam mechanism (10), so that the valve element (9) is arranged in the first axial position when the valve element (9) is in a first angular position with respect to the valve housing (5) and in the second axial position when the valve element (9) is in a second angular position that is different from the second angular position. The invention also relates to a method for operating a control valve (2) and a ventilation device (1) with a control valve (2).

Description

The invention relates to a control valve, in particular for a ventilation device, with a flow channel formed in a valve housing of the control valve, a valve element for setting a flow cross-sectional area of the flow channel being arranged in the flow channel. The invention also relates to a method for operating a control valve for a ventilation device and a ventilation device with a control valve.

From the prior art, for example, the publication DE 195 28 302 C2 known. This relates to a closing device for a ventilation system, in particular for a fan, with a plurality of slats arranged so as to be pivotable about their longitudinal axis and with an actuating device for pivoting the slats from a closed position into an open position and vice versa, the slats being arranged in such a way that they are in the closed position form a surface that is curved towards the longitudinal axes, preferably convexly curved outwards. It is provided that the actuating device interlaces the slats with different driving play in their open position, such that in the open position they have the same or approximately the same opening angle to a common reference plane.

It is the object of the invention to propose a control valve, in particular for a ventilation device, which has advantages over known control valves, in particular enabling a permanently precise adjustment of the flow cross-sectional area of the flow channel.

According to the invention, this is achieved with a control valve for a ventilation device with the features of claim 1 . It is provided that the valve element is axially displaceable with respect to a central longitudinal axis of the flow channel and interacts with a valve seat in a first axial position for setting a first flow cross-sectional area of the flow channel and in a second axial position for setting a second flow cross-sectional area of the flow channel that is different from the first flow cross-sectional area, wherein the valve element in the valve housing about one to the longitudinal central axis is rotatably mounted on a parallel axis of rotation and is connected to the valve housing via a cam mechanism, so that the valve element is arranged in the first axial position when the valve element is in a first angular position with respect to the valve housing, and in the second axial position when the valve element is in a second angular position that is different from the first angular position.

Advantageous configurations with expedient developments of the invention are specified in the dependent claims.

The control valve is preferably part of the ventilation device, but can also be present separately from it. The ventilation device serves in particular to ventilate a room, preferably an interior of a building. Aerating can be understood to mean aerating and/or venting. Aeration refers to a supply of fluid, in particular air, into the space, whereas venting describes a removal of the fluid from the space. In order to ventilate the room, the ventilation device preferably has a fan which is provided and designed to convey a fluid flow through the flow channel. The fan is driven or can be driven electrically, for example, and for this purpose is coupled in terms of drive technology to an electric motor.

Of course, the control valve can also be used in another area of application. In this respect, the control valve is first of all to be understood very generally as an adjustable valve, by means of which the through-flow cross-sectional area of the flow channel and consequently a fluid throughput through the control valve can be adjusted. The fluid throughput is to be understood as meaning a quantity of fluid per unit of time, preferably a fluid mass flow or a fluid volume flow.

The control valve has, as essential components, the flow channel formed in the valve housing and the valve element for setting the through-flow cross section or the through-flow cross-sectional area of the flow channel. The valve element is displaceable with respect to the valve housing so as to adjust the flow cross-sectional area of the flow channel. Here, in the different positions of the valve element with respect to the valve housing, there are different values for the flow cross-sectional area.

In order to enable a particularly simple structure and a reliable adjustment of the flow cross-sectional area, the valve element is axially displaceable, namely with respect to Central longitudinal axis of the flow channel. To this extent, the valve element can be arranged in different axial positions, namely at least the first axial position and the second axial position. The valve element is preferably mounted on the valve housing, namely in such a way that it can be displaced axially. In other words, the valve element is mounted on the valve housing such that it can be displaced in the axial direction.

In the different axial positions, the valve element interacts with the valve seat to set the different flow cross-sectional areas. In the different axial positions, the valve element is preferably at different distances from the valve seat. The respective through-flow cross-sectional area of the flow channel occurs between the valve element and the valve seat. In the first axial position, the through-flow cross-sectional area of the flow channel corresponds to the first through-flow cross-sectional area and in the second axial position of the valve element to the second through-flow cross-sectional area.

For example, the first through-flow cross-sectional area is smaller than the second through-flow cross-sectional area. The first flow cross-sectional area is particularly preferably equal to zero, so that in the first axial position the valve element interacts with the valve seat to close the flow channel. For this purpose, the valve element is preferably in continuous and uninterrupted contact with the valve seat. The second throughflow cross-sectional area preferably corresponds to a maximum adjustable throughflow cross-sectional area when the control valve is operated as intended. At least, however, the second through-flow cross-sectional area is larger than the first through-flow cross-sectional area, so that the flow channel is at least partially unblocked in terms of flow in the second axial position of the valve element.

The shifting of the valve element in the axial direction with respect to the longitudinal central axis of the flow channel can basically be implemented in different ways. However, it has turned out to be particularly advantageous to realize the axial displacement by means of the cam mechanism. Correspondingly, the valve element in the valve housing is not only displaceable in the axial direction with respect to the longitudinal central axis of the flow channel, but is also mounted such that it can rotate about the axis of rotation. In particular, the valve element can be displaced in and/or on the valve housing in the axial direction and is mounted so that it can rotate in the circumferential direction. The axis of rotation for rotating the valve element is parallel to the longitudinal central axis. That means the Axis of rotation either coincides with the longitudinal center axis or is arranged spaced parallel to it.

The valve element is connected to the valve housing via the cam mechanism. The cam mechanism is designed in such a way that when the valve element rotates with respect to the axis of rotation, it causes the valve element to move axially with respect to the longitudinal central axis of the flow channel. This means that the valve element is arranged in different axial positions in the case of different rotational angle positions of the valve element with respect to the valve housing. At least the valve element is in the first axial position in the first angular position and in the second axial position in the second angular position. In this case, both the first angular position and the second angular position and the first axial position and the second axial position are different from one another.

The cam mechanism is to be understood as meaning a mechanism that converts the rotational movement of the valve element directly into the axial displacement of the valve element. Each angular position is associated with an axial position and vice versa. The axial displacement takes place in this respect by means of the cam gear due to the rotary movement. The cam gear preferably has at least one first gear device and one second gear device, which interact to displace the valve element in the axial direction when the rotational movement is present. One of the transmission devices is, for example, in the form of a cam carrier and the respective other transmission device is in the form of a pickup element.

The configuration of the control valve described has the advantage that the flow cross-sectional area can be adjusted reliably and with great accuracy. In addition, it is possible to design an actuator for driving the valve element in an encapsulated manner in the circumferential direction, so that it is fluidically arranged separately from the flow channel. This ensures good protection of the actuator from external influences, so that a long service life of the control valve is achieved.

A further development of the invention provides that the valve element can be driven in the circumferential direction with respect to the actuating axis by means of an actuator, the actuator having an electric servomotor or a preloaded adjusting spring. The actuator is therefore used to rotate the valve element about the axis of rotation. For this purpose, the actuator drive is coupled to the valve element. In principle, the actuator can be designed in any way, provided that it is provided and designed to drive the valve element in the circumferential direction of the axis of rotation.

However, the actuating drive preferably has the electric actuating motor or the prestressed actuating spring or is present as such. The electric servomotor can also be referred to as an electric motor or as an electric actuator. The actuator is drivingly coupled to the valve element in such a way that, on the one hand, a rotary movement of the actuator is transmitted to the valve element, but, on the other hand, the axial displacement of the valve element with respect to the actuator is permitted. In other words, the valve element can be displaced in the axial direction with respect to the actuator, but is coupled to it in terms of drive technology in the circumferential direction with respect to the axis of rotation, preferably permanently and/or rigidly.

In addition or as an alternative to the servomotor, the spring can be a component of the actuator or can form it. The adjusting spring is preloaded in such a way that it exerts a force in the circumferential direction on the valve element, which at least temporarily causes its rotational movement and therefore its axial displacement. For example, although the valve element is acted upon by the force in the circumferential direction by the pretensioned adjusting spring, it is initially fixed in the circumferential direction by means of a holding device. When the holding device is released, the valve element is released for rotary movement in the circumferential direction, so that the force produced by the adjusting spring causes the rotary movement and consequently also the axial displacement.

In this case, the adjusting spring is pretensioned, for example, in such a way that the valve element is displaced by it into the first axial position or into the second axial position. After displacement by means of the adjusting spring, the valve element is preferably arranged to interrupt the flow channel in terms of flow. The holding device is designed, for example, in such a way that it releases the rotary movement of the valve element when a specific environmental condition occurs, for example when a temperature threshold value is exceeded by a temperature of the fluid present in the space and/or the flow channel and/or when there is smoke in the space and /or the flow channel. In this case, the control valve is designed in particular as a fire protection valve. The control valve described can be used universally and ensures reliable displacement of the valve element.

A further development of the invention provides that the actuator is drive-connected to the valve element without contact via a magnetic connection device, the magnetic connection device having a first magnetic connection device connected to the actuator and a magnetically interacting device with the first magnetic connection device and having a second magnetic connection device connected to the valve element, so that the first magnetic connection device is drivingly connected to the valve element only indirectly via the second magnetic connection device. The drive-related connection between the actuator and the valve element is made exclusively without contact, namely exclusively via the magnetic connection device. This means that the drive-related connection of the valve element to the actuator is present at least in some areas exclusively magnetically and at most partially mechanically.

The magnetic connection device has a plurality of magnetic connection devices, namely at least the first magnetic connection device and the second magnetic connection device. The two magnet coupling devices drivingly cooperate to drivingly couple the actuator to the valve element. The first magnetic connection device is assigned to the actuator and the second magnetic connection device is assigned to the valve element. This means that the first magnet connection device is preferably rigidly and permanently drive-connected to the actuator, whereas the second magnet connection device is preferably rigidly and permanently drive-connected to the valve element. For example, the second magnet connection device is attached to the valve element.

Ultimately, there is only an indirect drive-related connection between the actuator and the valve element, namely via the magnetic connection device. In this case, the first magnetic connection device is drive-connected to the valve element only indirectly via the second magnetic connection device and, conversely, the second magnetic connection device is only indirectly connected to the actuator via the first magnetic connection device. Such a design of the control valve enables a particularly effective encapsulation of the actuator in order to protect it from influences from the outside environment or from influences from the fluid. Accordingly, a particularly durable and long-lasting design of the control valve is realized.

A further development of the invention provides that the actuator is arranged in an actuator receptacle of an in particular fluid-tight drive housing present in the flow duct, with the first magnetic connection device being arranged on the one hand on a drive housing wall delimiting the actuator receptacle and the second magnetic connection device on the other hand on the drive housing wall, so that between the magnetic connection devices there is a magnetic connection running through the wall of the drive housing.

The drive housing is provided and designed to accommodate the actuator. Correspondingly, the drive housing has the actuator receptacle in which the actuator is arranged or at least can be arranged. The drive housing is located in the flow channel, so that the drive housing is acted upon by the fluid located in the flow channel. For example, the fluid is at least partially in contact with the drive housing wall of the drive housing, which delimits the actuator receptacle. In particular, the drive housing wall delimits the actuator receptacle from the flow channel.

Particularly preferably, the drive housing wall and the drive housing are designed to be fluid-tight, so that the fluid from the flow channel cannot flow into the actuator mount and, conversely, fluid present in the actuator mount cannot get into the flow channel. In other words, the drive housing, in particular the drive housing wall, separates the flow channel and the actuator receptacle from one another in terms of flow. Accordingly, the actuator is protected from the influence of the fluid.

Such a configuration of the control valve is made possible in particular by the magnetic connection device, via which the actuator and the valve element are connected to one another in terms of drive technology without contact. This is achieved by means of the magnetic connection that exists between the first magnetic connection device and the second magnetic connection device. The magnetic connection is to be understood as a magnetic connection via which a force and/or a torque can be transmitted between the magnetic connection devices.

The magnetic connection devices are arranged on opposite sides of the drive housing wall, namely in such a way that the magnetic connection is present between them, via which the actuator is drivingly coupled to the valve element. This means that the magnetic connection runs through the drive housing wall. The magnetic connection devices are particularly preferably arranged on opposite sides of the drive housing wall, opposite one another or with an overlap.

A straight line perpendicular to the drive housing wall, which can also be referred to as the surface normal, preferably runs on the one hand through the drive housing wall through the first magnet connection device and on the other hand through the drive housing wall through the second magnet connection device, so that the magnet connection devices are arranged opposite one another on different sides of the drive housing wall. This achieves a particularly effective power transmission or torque transmission between the magnet connection devices.

A further development of the invention provides that the drive housing is arranged in the flow channel via at least one holding web in such a way that the flow channel completely and in particular continuously surrounds the drive housing in the circumferential direction. The flow channel is delimited by a valve housing wall of the valve housing. The valve housing wall preferably encompasses the flow channel continuously and completely in the circumferential direction with respect to its longitudinal central axis. Viewed in the axial direction with respect to the longitudinal central axis, the drive housing is arranged at least in regions so as to overlap with the valve housing wall. The drive housing is arranged in the flow channel in such a way that it is continuously spaced from the channel wall in the circumferential direction, so that the flow channel completely surrounds the drive housing in the circumferential direction. For example, the drive housing is arranged in the middle or centrally in the flow channel, so that the distance between the drive housing and the valve housing wall is constant throughout in the circumferential direction.

Such an arrangement of the drive housing is achieved by means of the at least one holding web. The holding web engages on the one hand on the drive housing and on the other hand on the valve housing or the valve housing wall. It goes without saying that there can only be a single holding web. Particularly preferably, however, the drive housing is fastened by means of a plurality of holding webs, which each act on the valve housing or the valve housing wall on their side facing away from the drive housing, in order to hold the drive housing in the flow channel. The plurality of holding webs are particularly preferably arranged equidistantly in the circumferential direction, ie evenly distributed in the circumferential direction. For example, there are at least two holding webs, at least three holding webs or at least four holding webs. This enables a reliable and stable attachment of the drive housing in the valve housing.

A development of the invention provides that the at least one holding web carries a receiving element in which the drive housing is arranged, the drive housing being closed with a cover fastened to the receiving element. The receiving element is preferably formed in one piece and of the same material with the at least one holding web and the valve housing, whereas the drive housing is present as an insert part that can be inserted into the receiving element during assembly of the control valve. The receiving element, the at least one holding web and the valve housing are present here, for example, as an injection molded part or the like and are produced together. The drive housing, however, is separate from the Valve housing made and only subsequently used during assembly of the control valve in the receiving element. The receiving element is preferably in the form of a hollow cylinder which is fastened to the valve housing via the at least one holding web.

In addition to the receiving element, there is the cover, which is fastened to the receiving element and serves to close the drive housing. When assembling the control valve, provision is made to first insert the drive housing into the receiving element and then to arrange the cover on the receiving element and fasten it to it. Here, the drive housing is closed, namely by means of the cover. The cover particularly preferably closes the drive housing in a fluid-tight manner, so that the cover prevents fluid from penetrating from the flow channel into the drive housing. The lid is attached at least to the receiving element. For example, the cover is supported on the receiving element after it has been installed. In addition, the cover can be attached to the drive housing. It can also be provided that the cover is attached to the receiving element only indirectly, namely via the drive housing. For this purpose, the drive housing is first fastened to the receiving element and finally the cover is fastened to the drive housing, namely in each case directly.

Provision is particularly preferably made for the cover to be positively connected to the receiving element, the drive housing or both the receiving element and the drive housing, for example in each case by means of a snap-in connection. In this respect, there can be a positive connection or a latching connection between the cover and the receiving element or between the cover and the drive housing. However, it can also be provided that the cover is fastened to the receiving element via a first form-fitting connection or latching connection and to the drive housing via a second form-fitting connection or latching connection, preferably directly in each case. This achieves a reliable attachment of the cover and the drive housing to the receiving element. The cover preferably has a cover wall which can be regarded as part of the drive housing wall.

A further development of the invention provides that the at least one holding web and the cover jointly delimit a cable duct which opens into the drive housing on the one hand and into a cable receptacle formed away from the flow duct in the valve housing on the other. To this extent, the cable duct is present between the holding web and the cover and is controlled by them seen in section completely encompassed together. To this extent, the cable duct is protected from the influence of the fluid from the flow duct by the holding web and the cover.

The cable duct connects the drive housing to the cable receptacle, which is formed in the valve housing. At least one electrical line is preferably arranged in the cable duct, via which the actuator is electrically connected to a power connection of the control valve. The power connection is present, for example, as a plug connection or as a clamp connection on the valve housing and enables an electrical connection of the control valve or the actuator to a power source that is located away from the control valve. This design of the control valve ensures a reliable electrical connection of the actuator.

A further development of the invention provides that the cam gear has a first gear device connected to the valve housing and a second gear device which interacts positively with the first gear device to form the cam gear and is formed on the valve element. To this extent, the cam gear consists of the first gear device and the second gear device, which interact to convert the rotational movement of the valve element into an axial displacement of the valve element. This interaction takes place in a form-fitting manner.

For this purpose, one of the gear devices is designed as a guide projection or pick-off element and the other gear device is designed as a guide recess or cam carrier, with the guide projection engaging in the guide recess. The guide recess is angled at least in regions relative to a longitudinal center axis of the valve element, which preferably coincides with the longitudinal center axis of the flow channel, or a straight line parallel to this. This means that the guide recess encloses an angle with the longitudinal center axis or with the straight line parallel to it, which is greater than 0° and less than 90°. The angle is particularly preferably at least 15° and at most 75°, at least 30° and at most 60° or approximately or exactly 45°.

The first transmission device is connected to the valve housing, in particular rigidly and permanently connected. To this extent, the first transmission device is stationary and protrudes into the valve housing. The second transmission device, on the other hand, is present on the valve element or is attached to it. The second gear mechanism preferably forms part of the valve element. This achieves good fatigue strength of the cam gear, so that the control valve is characterized by a particularly long service life and functional reliability.

A further development of the invention provides that the first gear mechanism is a guide projection and the second gear mechanism is a guide recess, in particular a helical guide recess, which positively accommodates the guide projection. The first gear device connected to the valve housing is therefore the guide projection, and the second gear device designed as a guide recess is assigned to the valve element. The guide recess is preferably designed directly in the valve element.

The guide recess runs at an angle relative to the longitudinal center axis of the valve element or the straight line parallel to it, so that the interaction of the first gear mechanism with the second gear mechanism converts a rotational movement of the valve element relative to the valve housing into an axial displacement of the valve element relative to the valve housing. An extension of the guide recess in the circumferential direction is, for example, at least 15° and at most 90°, preferably at least 30° and at most 45°. For example, the guide recess extends in the circumferential direction over at most 90°, at most 60° or at most 45°. For example, the guide recess runs helically at least in sections, in particular continuously helically. Such a design of the cam gear allows a reliable displacement of the valve element in the axial direction.

A development of the invention provides that the at least one holding web forms the guide projection. The at least one holding web is not only used to hold the actuator in the flow channel, but also forms the cam mechanism. As a result, an additional element for the cam gear can be dispensed with, so that an effective through-flow cross-sectional area of the flow channel is or can be achieved.

A further development of the invention provides that the first magnetic connection device and the second magnetic connection device each have a plurality of magnetic connection elements which magnetically interact with one another. It can be provided here that the magnet connection elements of one of the magnet connection devices are designed as permanent magnets, whereas the magnet connection elements of the second magnet connection device consist of a magnetizable material. However, the magnetic connecting elements of both magnetic connecting devices are particularly preferably designed as permanent magnets in order to achieve a reliable magnetic connection between the magnetic connecting devices.

A development of the invention provides that the first magnetic connection device is rotatably mounted on the cover. For this purpose, the first connecting device and the cover are connected to one another via a rotary bearing, in particular a plain bearing. For example, the cover has a bearing journal on which the first magnetic connection device is rotatably seated. The first magnet connection device is particularly preferably held on the bearing journal via a latching connection. For example, the bearing journal has at least one latching element for this purpose, which engages in a form-fitting manner for latching on the first magnet connection device. Provision is preferably made for the first magnetic connection device to be rotatably mounted on the cover during assembly of the control valve, in particular to be applied to the bearing pin until the latching connection between the first magnetic connection device and the bearing pin is present.

The first magnetic connection device preferably has a hollow-cylindrical base body that is slipped onto the bearing pin, so that the bearing pin extends at least partially or even completely through the base body in the axial direction with respect to an axis of rotation of the first magnetic connection device. The base body is surrounded by a gear wheel, via which the first magnetic connection device is connected to the actuator, for which purpose the gear wheel meshes with a gear wheel of the actuator. The base body is encompassed by a support ring, which is fastened to the base body, for example, via at least one web. The support ring and the base body are preferably connected to one another via a plurality of webs which are distributed uniformly in the circumferential direction with respect to the axis of rotation.

The magnet connection elements of the first magnet connection device are arranged on the support ring. The first magnet connection device, in particular the support ring, preferably has receiving pockets for the magnet connection elements. The receiving pockets are open to the outside in the radial direction. The magnetic connecting elements are preferably pressed and/or glued into the receiving pockets. In any case, the receiving pockets are arranged and aligned in such a way that the cover holds the magnetic connecting elements in the receiving pockets after the first magnetic connecting device has been mounted on the cover, in particular mounted in a rotatably mounted manner on the latter.

The invention also relates to a method for operating a control valve, preferably for a ventilation device, in particular a control valve according to the statements made within the scope of this description, the control valve having a flow channel formed in a valve housing of the control valve, in which a valve element for setting a Flow cross-sectional area of the flow channel is arranged. It is provided that the valve element is axially displaceable with respect to a central longitudinal axis of the flow channel and interacts with a valve seat in a first axial position for setting a first flow cross-sectional area of the flow channel and in a second axial position for setting a second flow cross-sectional area of the flow channel that is different from the first flow cross-sectional area, wherein the valve element in the valve housing is rotated at least temporarily about an axis of rotation parallel to the longitudinal center axis and is connected to the valve housing via a cam mechanism, so that the valve element is in the first axial position when the valve element is in a first angular position with respect to the valve housing and in a different angular position from the first angular position second angular position of the valve element is arranged in the second axial position.

The advantages of such a procedure or such a configuration of the control valve have already been pointed out. Both the control valve and the method for operating it can be further developed in accordance with the statements made within the scope of this description, so that reference is made to them in this respect.

The invention also relates to a ventilation device with a control valve, in particular a control valve according to one or more of the preceding claims, wherein the control valve has a flow channel formed in a valve housing of the control valve, in which a valve element for setting a flow cross-sectional area of the flow channel is arranged. It is provided that the valve element is axially displaceable with respect to a central longitudinal axis of the flow channel and interacts with a valve seat in a first axial position for setting a first flow cross-sectional area of the flow channel and in a second axial position for setting a second flow cross-sectional area of the flow channel that is different from the first flow cross-sectional area, wherein the valve element is rotatably mounted in the valve housing about an axis of rotation parallel to the longitudinal center axis and is connected to the valve housing via a cam mechanism, so that the valve element is in the first axial position when the valve element is in a first angular position with respect to the valve housing and in a second angular position that is different from the first angular position of the valve element is arranged in the second axial position.

With regard to the advantages and possible developments of the ventilation device and the control valve, reference is once again made to the explanations within the scope of this description.

A development of the invention provides a fan that is provided and designed to convey a fluid flow through the flow channel. The ventilation device therefore has the fan in addition to the control valve. The fan is particularly preferably driven electrically, namely by means of an electric fan drive. The fan drive is particularly preferably arranged in the drive housing, namely together with the actuator, which is used to adjust the flow cross-sectional area of the flow channel. In this case, the fan is preferably arranged on the side of the drive housing which is opposite the valve element in the axial direction.

The fan preferably has an impeller and a guide wheel. The impeller is arranged between the guide wheel and the drive housing in the axial direction with respect to the longitudinal center axis of the flow channel. The impeller preferably has a plurality of impeller blades which are arranged on the outside in the radial direction on a pot-shaped base body of the impeller. During assembly of the ventilation device, the base body is arranged in such a way that it encompasses the drive housing and/or the receiving element in the radial direction on the outside at least in regions, in particular continuously and uninterruptedly in the circumferential direction. For example, the base body rests against the gear housing and/or the receiving element, so that the impeller is rotatably mounted or a sliding bearing is formed for the impeller. A gear wheel is preferably formed on the base body, which gear meshes with a gear wheel of the fan drive. The impeller or the base body of the impeller can, of course, also be coupled directly to the fan drive in terms of drive technology and, for this purpose, in particular can act directly on a shaft of the fan drive. The features and feature combinations described in the description, in particular the features and feature combinations described in the following description of the figures and/or shown in the figures, can be used not only in the combination specified in each case, but also in other combinations or on their own, without going beyond the scope of the leave invention. The invention is therefore also to be regarded as encompassing embodiments which are not explicitly shown and explained in the description and/or the figures, but emerge from the explained forms of expression or can be derived from them.

Figur 1

eine schematische Explosionsdarstellung einer Lüftungseinrichtung mit einem Stellventil und einem Ventilator,

Figur 2

eine schematische Darstellung eines in einem Antriebsgehäuse angeordneten Stellantriebs zum Einstellen einer Durchströmungsquerschnittsfläche eines Strömungskanals des Stellventils,

Figur 3

eine weitere schematische Darstellung des Stellantriebs,

Figur 4

eine schematische Darstellung eines Deckels zum Verschließen des Antriebsgehäuses, sowie

Figur 5

eine schematische Darstellung eines Ventilelements des Stellventils.

The invention is explained in more detail below with reference to the exemplary embodiments illustrated in the drawing, without the invention being restricted. It shows:

figure 1

a schematic exploded view of a ventilation device with a control valve and a fan,

figure 2

a schematic representation of an actuator arranged in a drive housing for adjusting a flow cross-sectional area of a flow channel of the control valve,

figure 3

another schematic representation of the actuator,

figure 4

a schematic representation of a cover for closing the drive housing, and

figure 5

a schematic representation of a valve element of the control valve.

the figure 1 shows a schematic representation of a ventilation device 1, which is preferably provided and designed for ventilating an interior of a building. The ventilation device has a control valve 2 and a fan 3. The fan 3 is provided and designed to convey a fluid, in particular air, through a flow channel 4, either in the direction of the interior or from the direction of the interior. The flow channel 4 is formed in a valve housing 5 of the control valve 2 .

For example, the valve housing 5 has a wall attachment 6 which was mounted on a wall delimiting the interior. A valve housing wall 7 extends from the wall attachment 6 , which in the exemplary embodiment shown here is partially hollow-cylindrical, in particular a hollow-circular cylinder, preferably on its side facing the fan 3 . On the side facing away from the fan 3, the flow channel 4 widens, the valve housing wall 7 being funnel-shaped, for example. The wall attachment 6 is provided with a cover 8, for example, which is arranged at a distance from the wall attachment 6, so that there is an outflow channel or inflow channel between the cover 8 and the wall attachment 6, via which the flow channel 4 is in flow connection with the interior.

The cover 8 is used to deflect fluid flowing through the flow channel 4 in the direction of the cover 8 or in the direction of the interior. While it flows through the flow channel 4 essentially in the axial direction with respect to a longitudinal center axis of the flow channel 4, it is deflected by the cover 8 so that it flows radially outward with respect to the longitudinal center axis and reaches the interior. Conversely, if the fluid is pumped out of the interior, it first flows in the radial direction into the Ventilation device 1 and is subsequently deflected so that it in turn flows through the flow channel 4 in the axial direction.

A valve element 9 is assigned to the flow channel 4, by means of which a flow cross-sectional area of the flow channel 4 can be adjusted. The flow cross-sectional area of the flow channel 4 is adjusted by displacing the valve element 9 in the axial direction with respect to the central longitudinal axis of the flow channel 4. In a first axial position of the valve element 9 with respect to the valve housing 5, there is a first distance between the valve element 9 and the valve housing 5, at which a first flow cross-sectional area of the flow channel 4 is given. In a second axial position, on the other hand, there is a second distance between the valve element 9 and the valve housing 5 that differs from the first distance, so that a second through-flow cross-sectional area is established, which differs from the first through-flow cross-sectional area.

The displacement of the valve element 9 in the axial direction is brought about by a rotary movement of the valve element 9 with respect to the valve housing 5, i.e. by a rotary movement of the valve element 9 in the circumferential direction with respect to the longitudinal central axis of the flow channel 4. For this purpose, the valve element 9 is connected via a cam gear 10 (not marked here ) connected to the valve housing 5. The cam mechanism 10 converts the rotational movement of the valve element 9 into axial displacement.

The valve element 9 can be driven in the circumferential direction with respect to the axis of rotation by means of an actuator 11 . In this case, the actuator 11 has an electric servomotor 12 . The servomotor 12 is arranged in a drive housing 13 . The drive housing 13 is held in the flow channel 4 by means of at least one holding web 14 (in the exemplary embodiment shown here by means of a plurality of holding webs 14). Specifically, a receiving element 15 is arranged in the flow channel 4 by means of the at least one holding web 14 and receives the drive housing 13 . A drive motor 16 (not visible here) is also arranged in the drive housing 13, by means of which the fan 3 is at least temporarily driven.

A cover 17 is arranged on the receiving element 15, which cover closes the drive housing 13, preferably in a fluid-tight manner. The cover 17 has at least one arm 18, preferably as many arms 18 as holding webs 14 are present. The arms 18 are arranged on the cover 17 in such a way that after the cover 17 has been arranged on the receiving element 15 they engage over the holding webs 14 . In this way, the at least one holding web delimits 14 and the cover 17 or its respective arm 18 together form a cable duct 19. The cable duct 19 connects the drive housing 13 to a cable receptacle 20 which is formed in the valve housing 5.

The valve element 9 is driven in the circumferential direction by means of the actuator 11 or the servomotor 12 with the aid of a magnetic connection device 21. With the aid of the magnetic connection device 21, a contactless transmission of force or torque between the actuator 11 and the valve element 9 is achieved. The magnetic connecting device 21 has a first magnetic connecting device 22 and a second magnetic connecting device 23. The first magnetic connecting device 22 is drivingly connected to the actuator 11, whereas the second magnetic connecting device 23 is assigned to the valve element 9 and is preferably attached to it.

There is a magnetic connection between the magnetic connection devices 22 and 23 which runs through a drive housing wall 24 of the drive housing 13 . For this purpose, the magnetic connection devices 22 and 23 are arranged on opposite sides of the drive housing wall 24 after the assembly of the control valve 2 or the ventilation device 1, namely the first magnetic connection device 22 in the radial direction on the inside and the second magnetic connection device 23 in the radial direction on the outside of the drive housing wall 24. In this In connection, it should be pointed out that a cover wall 24′ of the cover can also be regarded as part of the drive housing wall 24, since it also delimits a space delimited outwards in the radial direction in some areas by the drive housing wall 24 in the radial direction.

The first magnetic connection device 22 has a base body 25 on which a gear 26 is arranged. This gear wheel 26 meshes with a gear wheel 26 ′, which is coupled to the servomotor 12 in a torque-proof manner. A retaining ring 27 is connected to the base body 25, in particular via one or more webs 28. A plurality of magnetic connection elements 28 of the first magnetic connection device 22 are arranged on the retaining ring 27. The retaining ring 27 preferably has receiving pockets for the magnetic connecting elements 29. The second magnetic connecting device 23 also has magnetic connecting elements 30, which are not visible here. These are firmly connected to the valve element 9 . For example, they are pushed into receiving pockets of the valve element 9 .

It can be seen that the fan 3 has an impeller 31 . In addition, a guide wheel, not shown here, can be present. The impeller 31 has several blades 33, which are only partially identified. The moving blades 33 extend from a base body 34 of the impeller 31 , which is essentially pot-shaped and, after the ventilation device 1 has been installed, encloses the receiving element 15 for mounting the impeller 31 .

the figure 2 shows a schematic representation of the actuator 11 arranged in the drive housing 13. The actuator 12 of the actuator 11 is preferably a servomotor, in particular a model-making servomotor. This has, for example, a nominal torque of at most 100 Ncm, at most 75 Ncm, at most 50 Ncm or at most 25 Ncm. However, the nominal torque of the actuator 11 or of the servo motor is particularly preferably lower, in particular it is at most 15 Ncm, at most 10 Ncm or at most 5 Ncm. At least one recess 35 is formed in the drive housing wall 24 . There are preferably several recesses 35 . During assembly of the ventilation device 1 , the recesses 35 are arranged in such a way that they overlap with the cable ducts 19 . Correspondingly, the recesses 35 serve to guide at least one line present in the cable duct 19 into the drive housing 13, for example up to the drive motor 16.

the figure 3 shows a further schematic representation of the actuator 11 in the drive housing 13. An electronic control system 36, which serves to control and/or supply energy to the servomotor 12, is also arranged in the drive housing 13. In addition, it can be seen that the drive motor 16 for driving the fan 3 is also present in the drive housing 13 . The servomotor 12 and the drive motor 16 are arranged in such a way that their shafts project in opposite directions. A different arrangement of servomotor 12 and drive motor 16 is also fundamentally possible, for example an arrangement in which the shafts of servomotor 12 and drive motor 16 or the axes of rotation of the shafts are angled at 90° to one another.

the figure 4 shows a schematic representation of the cover 17 and the first magnetic connection device 22. It can be seen that the first magnetic connection device 22 is mounted on the cover 17 by means of a pin 37 of the latter. The pin 37 also has latching means 38 which rotatably hold the first magnetic connection device 22 on the cover 17 .

the figure 5 shows a schematic representation of the valve element 9. The magnet connection elements 30 of the second magnet connection device 23, which are arranged in receiving pockets of the valve element 9, can be seen. A conversion of the rotational movement of the valve element 9 into its displacement in the axial direction is achieved with the aid of the cam mechanism 10 . This has a first gear device 39 and a second gear device 40 . In this case, the first gear device 39 is a guide projection and the second gear device 40 is a guide recess, which accommodates the guide projection in a form-fitting manner.

The guide projection is formed by the already known holding web 14, via which the receiving element 15 is fastened to the valve housing 5. The arm 18 can also form part of the first gear device 39 . The second transmission device 40, ie the guide recess, is formed in the valve element 9. The guide recess runs at an angle with respect to the longitudinal center axis of the flow channel 4 or an axis of rotation of the valve element 9 . This means that it is at an angle to this or to a straight line parallel to it, which is greater than 0° and less than 180°, in particular greater than 0° and less than 90°. The cam mechanism 10 ensures reliable conversion of the rotary movement of the valve element 9 caused by the actuator 11 into its axial movement, so that the valve element 9 can be displaced between different axial positions in which different flow cross-sectional areas of the flow channel 4 are set.

The configuration of the ventilation device 1 described has the advantage that the actuator 11 can be easily encapsulated against external influences. In addition, the use of the magnetic connection device 21 offers the advantage that a jamming of the valve element 9 does not lead to damage to the actuator 11, since the magnetic connection device 21 works as a type of overload clutch.

REFERENCE LIST

1

ventilation device

2

control valve

3

fan

4

flow channel

5

valve body

6

wall attachment

7

valve body wall

8th

cover

9

valve element

10

cam gear

11

actuator

12

actuator

13

drive housing

14

dock

15

receiving element

16

drive motor

17

lid

18

poor

19

Cabel Canal

20

cable intake

21

magnetic connection device

22

1. Magnetic connection device

23

2. Magnetic connection device

24

drive housing wall

24'

top panel

25

body

26

gear

26'

gear

27

retaining ring

28

web

29

magnet fastener

30

magnet fastener

31

Wheel

33

blade

34

body

35

recess

36

control electronics

37

cones

38

locking means

39

1. Transmission device

40

2. Transmission device

Claims (15)

Control valve (2), in particular for a ventilation device (1), with a flow channel (4) formed in a valve housing (5) of the control valve (2), with a valve element (9) in the flow channel (4) for setting a flow cross-sectional area of the flow channel (4), characterized in that the valve element (9) is axially displaceable with respect to a central longitudinal axis of the flow channel (4) and is provided with a valve seat in a first axial position for setting a first flow cross-sectional area of the flow channel (4) and in a second axial position for Adjusting a second flow cross-sectional area of the flow channel (4), which is different from the first flow cross-sectional area, wherein the valve element (9) is mounted in the valve housing (5) so that it can rotate about an axis of rotation parallel to the longitudinal central axis and is connected to the valve housing (5) via a cam mechanism (10). is connected, so that the valve element (9) at a first angular position of the valve element (9) with respect to the valve housing (5) in the first axial position and in a second angular position of the valve element (9) different from the second angular position in the second axial position. Control valve according to Claim 1, characterized in that the valve element (9) can be driven in the circumferential direction with respect to the axis of rotation by means of an actuator (11), the actuator (11) having an electric servomotor (12) or a prestressed adjusting spring. Control valve according to one of the preceding claims, characterized in that the actuator (11) is drive-connected to the valve element (9) without contact via a magnetic connection device (21), the magnetic connection device (21) having a first magnetic connection device ( 22) and a second magnetic connecting device (23) which interacts magnetically with the first magnetic connecting device (22) and is connected to the valve element (9), so that the first magnetic connecting device (22) is connected to the valve element (9) only indirectly via the second magnetic connecting device (23). is drivingly connected. Control valve according to one of the preceding claims, characterized in that the actuator (11) is arranged in an actuator receptacle of a drive housing (13) present in the flow duct (4), the first magnetic connection device (42) on the one hand being a drive housing wall (24) delimiting the actuator receptacle and the second magnetic connection device (23) is arranged on the other side of the drive housing wall (24), so that there is a magnetic connection running through the drive housing wall (24) between the magnetic connection devices (22, 23). Control valve according to one of the preceding claims, characterized in that the drive housing (13) is arranged in the flow channel (4) via at least one holding web (14) in such a way that the flow channel (4) completely surrounds the drive housing (13) in the circumferential direction. Control valve according to one of the preceding claims, characterized in that the at least one retaining web (14) carries a receiving element (15) in which the drive housing (13) is arranged, the drive housing (13) having a fixed to the receiving element (15). Lid (17) is closed. Control valve according to one of the preceding claims, characterized in that the at least one holding web (14) and the cover (17) jointly delimit a cable duct (19) which leads on the one hand into the drive housing (13) and on the other hand into a path away from the flow duct (4) cable receptacle (20) formed in the valve housing (5). Control valve according to one of the preceding claims, characterized in that the cam gear (10) has a first gear device (39) connected to the valve housing (5) and a first gear device (39) which interacts positively to form the cam gear (10) and is attached to the Valve element (9) formed second gear device (40). Control valve according to one of the preceding claims, characterized in that the first gear device (39) is a guide projection and the second gear device (40) is a guide recess receiving the guide projection in a form-fitting manner. Control valve according to one of the preceding claims, characterized in that the at least one holding web (14) forms the guide projection. Control valve according to one of the preceding claims, characterized in that the first magnetic connection device (22) and the second magnetic connection device (23) each have a plurality of magnetically interacting magnetic connection elements (29, 30). Control valve according to one of the preceding claims, characterized in that the first magnetic connection device (22) is rotatably mounted on the cover (17). Method for operating a control valve (2), in particular a control valve (2) according to one or more of the preceding claims, wherein the control valve (2) has a flow channel (4) formed in a valve housing (5) of the control valve (2), in in which a valve element (9) is arranged for setting a through-flow cross-sectional area of the flow channel (4), characterized in that the valve element (9) can be displaced axially with respect to a central longitudinal axis of the flow channel (4) and has a valve seat in a first axial position for setting a first flow cross-sectional area of the flow channel (4) and in a second axial position for adjusting a second flow cross-sectional area of the flow channel (4) that differs from the first flow cross-sectional area, wherein the valve element (9) in the valve housing (5) is rotated at least temporarily about an axis of rotation parallel to the longitudinal central axis will and u connected to the valve housing (5) via a cam gear (10), so that the valve element (9) is in the first axial position when the valve element (9) is in a first angular position with respect to the valve housing (5) and in a second angular position that is different from the first angular position of the valve element (9) is arranged in the second axial position. Ventilation device (1) with a control valve (2), in particular with a control valve (2) according to one or more of the preceding claims, wherein the control valve (2) has a flow channel (4) formed in a valve housing (5) of the control valve (2). in which a valve element (9) for setting a flow cross-sectional area of the flow channel (4) is arranged, characterized in that the valve element (9) can be displaced axially with respect to a longitudinal center axis of the flow channel (4) and is provided with a valve seat in a first axial position towards Adjusting a first throughflow cross-sectional area of the flow channel (4) and in a second axial position for adjusting a second throughflow cross-sectional area of the flow channel (4) that differs from the first throughflow cross-sectional area, the valve element (9) in the valve housing (5) interacting about an axis of rotation parallel to the longitudinal central axis rotatably mounted and a Ku rven transmission (10) is connected to the valve housing (5), so that the valve element (9) in a first angular position of the valve element (9) with respect to the valve housing (5) in the first axial position and in a second angular position of the valve element that differs from the first angular position (9) is located in the second axial position. Ventilation device according to Claim 14, characterized by a fan (3) which is provided and designed to convey a fluid flow through the flow channel (4).

Images