DE102022110675A1 - Ventilation device for building technology with heat recovery and method for mounting a ventilation device on a ventilation system - Google Patents

Abstract

The invention relates to a ventilation device (100) for building services with heat recovery, comprising a housing (102), a supply air line (104) arranged in the housing (102), an exhaust air line (106) arranged in the housing (102), a heat exchanger (120) for transferring heat between an outside air flow (116) guided in the supply air line (104) and an exhaust air flow (118) guided in the exhaust air line (106), a bypass line (130) assigned to the supply air line (104) for guiding a bypass air flow (132) past the Heat exchanger (120), and a flow adjuster (136) assigned to the bypass line (130) in the supply air line. In the housing (102) there is also a bypass line (130 ') assigned to the exhaust air line (106) for guiding a bypass air flow (132) past the heat exchanger (120), wherein at least one (first) opening is provided on the housing (102) on one side (160) of the housing as access to a receptacle (162) for the flow adjuster (136) in the housing (102), via which the flow adjuster ( 136) can be removed from the receptacle (162), and wherein the (first) opening on the housing (102) is designed in this way or a further (second) opening on the same side of the housing (160) as access to one of the bypass line (130`) in the exhaust air line (106) associated further receptacle (162`) is provided, the further receptacle (162`) being designed to be compatible with the flow adjuster (136), so that one and the same flow adjuster (136) can be inserted into the respective housing side (160) from the same housing side (160). Recordings (162, 162`) can be used reversibly.

Description

The invention relates to a ventilation device for building services with heat recovery, comprising a housing, a supply air line arranged in the housing, an exhaust air line arranged in the housing, a heat exchanger for transferring heat between an outside air flow guided in the supply air line and an exhaust air flow guided in the exhaust air line, a bypass line assigned to the supply air line for guiding a bypass air flow past the heat exchanger, the bypass line in the supply air line being assigned a flow adjuster, and a bypass line assigned to the exhaust air line for guiding a bypass air flow past the heat exchanger. Furthermore, the invention also relates to a method for mounting a ventilation device on a ventilation system.

A wide variety of ventilation devices are used to ventilate and/or ventilate rooms in buildings. With the help of such ventilation devices, a controlled exchange of air can take place in the rooms. Modern ventilation devices have a heat exchanger within their housing, through which a supply air flow led into the room and an exhaust air flow led out of the room are conducted during normal operation of the ventilation device. When simultaneously flowing through the heat exchanger, heat is transferred from the exhaust air flow to the outside air flow, which results in heat recovery.

However, at certain times of the year, especially in summer, it is advantageous to be able to direct at least part of the outside air flow in the supply air line past the heat exchanger in order to avoid heating up the outside air flow. For this purpose, a bypass line can be integrated in the supply air line and/or in the exhaust air line. A flow adjuster is arranged in the supply air line of the device, with which the proportion of the supply air flow that passes through the bypass line is adjusted. The duct routing is therefore fixed within the device, which in certain installation situations leads to the connection lines of the ventilation system, as the connections for the supply and exhaust air are on the wrong side of the ventilation device and inconvenient with the inlets and outlets of the supply air - and exhaust air line must be connected when installing the ventilation device. In order to deal with such a complex adjustment on site, the duct routing within the ventilation device would have to be changed at the time of device production.

The invention was therefore based on the object of overcoming the disadvantages shown above and, in particular, of demonstrating a ventilation device for building technology with heat recovery or a method for assembling a ventilation device, which enables a simplified adjustment of the air flow even when the ventilation device is being assembled by a fitter at the installation site .

The invention solves the underlying problem according to a first aspect by a ventilation device with the features according to claim 1. In particular, at least one (first) opening is provided on the housing on one side of the housing as access to a receptacle for the flow adjuster in the housing, via which the Flow adjuster can be removed from the receptacle, and wherein the (first) opening in the housing is designed in such a way or a further (second) opening is provided on the same side of the housing as access to a further receptacle assigned to the bypass line in the exhaust air line, the further receptacle being compatible with the flow adjuster designed and thus one and the same flow adjuster can be reversibly inserted into the respective receptacles from the same side of the housing.

The invention is based on the knowledge that by providing a bypass line in the supply air line and in the exhaust air line, an air flow can be directed past the heat exchanger via both the supply air line and the exhaust air line. This means that a technician at the installation site has the opportunity to change the routing of the outside air flow and the exhaust air flow in the ventilation device as required if necessary. This allows the ventilation device to be easily adapted to the supply and exhaust air supply conditions at an installation location. Furthermore, with the at least one opening on one side of the ventilation device, at least one access into the interior of the ventilation device is created, by means of which a flow adjuster assigned to the bypass line in the supply air line can now be easily switched back and forth between the bypass line in the supply air line and the bypass line in the exhaust air line.

Preferably, the flow adjuster is removed via the one or the first opening on the housing side, in particular from the receptacle in the area of the inlet opening for the bypass line in the supply air line, and inserted via the same or a second opening on the same housing side into a receptacle compatible with the flow adjuster, which is in the area the bypass line assigned to the exhaust air line is provided. In addition to adjusting the outside air flow and the exhaust air flow to the ventilation device as required, the flow adjuster can also be arranged in one of the two air lines as required, via which the outside air flow into the ventilation device should be initiated. Despite the improved and, above all, individual adaptability of the ventilation device, its costs can be kept as low as possible by simplifying the implementation of the components in the housing.

According to a preferred embodiment of the ventilation device, the flow adjuster has a flap part movable about a pivot axis and an actuator coupled to the flap part, with two spaced-apart receptacles on the same side of the housing, one of the receptacles being assigned to one of the respective bypass lines, for at least the flap part moving actuator are provided. With the design of two spaced-apart receptacles that are accessible from the same side of the housing of the device, a simple possibility is possible for removing the flow adjuster from, for example, the supply air line in the housing and reinserting the flow adjuster into the receptacle on the exhaust air line, without the Flow adjuster must be changed in its alignment or orientation to the housing. In a preferred embodiment, the receptacles for the flow adjuster in the area of the supply air line and the exhaust air line and the flow adjuster itself are designed to be compatible with one another in such a way that the flow adjuster can be removed from the supply air line and inserted into the exhaust air line without any structural adjustment. The fitter entrusted with adjusting the ventilation device preferably only has to make adjustments to the ventilation device from one side of the housing, in particular the front side of the housing. This further simplifies the assembly of the ventilation device at the installation site and a possible associated adaptation to the connection options for the ventilation system available there.

According to a preferred embodiment, only one opening is provided as access to the receptacles in the ventilation device, which is dimensioned so that access to the receptacles in the inlet and exhaust air lines is possible and can be closed via a single housing part that forms areas of the front of the housing . In an alternative embodiment, the housing of the ventilation device has a first opening, which allows access to the receptacle for the flow adjuster assigned to the bypass line in the supply air line, and a second opening, which allows access to the receptacle for the flow adjuster assigned to the bypass line in the exhaust air line. The first and second openings are also closed via housing parts of the housing.

A preferred embodiment of the ventilation device provides that the receptacles for the actuator are designed as recesses on the inside of the housing defining the areas of the supply air and exhaust air lines. At least areas of the receptacles for the flow adjuster, in particular for its actuator, are designed as recesses on the housing. The actuating drive of a respective flow adjuster is preferably accommodated within the recesses and is fixed in its position relative to the housing. This results in a preferably precise alignment of the flow adjuster, for example with the inlet opening of a bypass line in the supply air line and/or exhaust air line. Preferably, the flow adjuster, in particular with its flap part that can be moved by the actuator, can be moved back and forth between a closed position in which the inlet opening of the bypass line is completely closed and an open position in which the inlet opening of the bypass line is completely open. By adjusting the flap part, the volume flow passing through the supply air or exhaust air line and the bypass line can be adjusted.

The recesses on the inside of the housing preferably form areas or sections of the wall within the housing that delimits the supply air and exhaust air lines. In particular, the recesses for the actuator are formed on the inside of the housing part or parts, which close the only opening on the housing or the first and second openings as access to the interior of the housing.

A preferred development of the ventilation device provides that the flap part has a first holding part for a rotationally fixed connection to the actuator and a second holding part for a rotatable connection with a holder on the inside of the housing. The first holding part is used as a connection to the actuator and is used in particular to transmit the adjustment movement specified by the actuator to the flap part. The second holding part serves in particular for rotatably connecting to a section of the housing, which is preferably arranged opposite the recess for the actuator. The holding parts preferably create two articulation points for the movable flap part, around which the flap part can be pivoted at least over a predetermined angular range in the supply air or exhaust air line.

Preferably, the first and second holding parts are arranged at opposite ends of the flap part and each have an axle journal, the axle journals preferably extending coaxially to one another and the pivot axis for define the flap part. By arranging the holding parts at the opposite ends, a simple suspension for the flap part is achieved; In particular, the axle journal of the first holding part is positively coupled to a drive shaft of the actuator in the assembled state of the flap part. The rotary movement generated by the actuator can in particular be transmitted without play to the first holding part and thus to the flap part. The axle journal on the second holding part is preferably accommodated in the holder so that it can rotate freely. The holder for the second holding part can be designed as a material recess or as a pin-like projection on a corresponding section of the inside of the housing.

According to a preferred embodiment, the axle journals, in particular their central axis, run coaxially with one another and together form the pivot axis for the flap part. In particular, the drive shaft of the actuator and the holder that accommodates the second holding part on the flap part are aligned with one another, which results in a controlled adjustment movement of the flap part about its pivot axis in the supply air or exhaust air line of the ventilation device.

A further development of the invention provides that the first holding part and the second holding part, in particular their axle journals, each have plug-in receptacles which can be brought into operative connection with a drive shaft of the actuator or with the holder on the housing arranged opposite the actuator. By providing plug-in receptacles, the flap part can be easily inserted or removed in the housing, especially in the supply air or exhaust air line of the housing. Preferably, a plug connection is formed between the axle journals on the flap part and the holder in the housing on the one hand and the actuator moving the flap part, in particular with its drive shaft, on the other hand. Such plug-in connections can be made and separated again as often and, above all, easily. At least by means of the plug connection created between the first holding part and the actuator, in particular its drive shaft, a positive connection is achieved for a rotationally fixed connection around the pivot axis of the flap part. With the plug connection between the second holding part and the holder on the housing, a rotary connection is created when the flap part is inserted into the housing.

According to a preferred embodiment of the ventilation device, the holding parts are set up for reversibly detachable coupling to the flap part. The holding parts, which preferably protrude from one surface of the flap part, can be removed from the flap part and preferably arranged on the opposite surface of the flap part. The holding parts are preferably designed to be mounted on both surfaces of the flap part. This makes it possible to adapt the flap part in order to achieve a secure seal with preferably the inlet opening of a respective bypass line branching off from the supply air or exhaust air line. With the adjustment of the flap part in terms of its pivotable location in the housing, the insertion of the flow adjuster from the same side of the housing of the ventilation device is further improved, even if minor adjustments to the components of the flow adjuster are necessary.

The flap part preferably has recesses for the holding parts that can be arranged on both sides of the flap part, and the holding parts each have positive locking elements corresponding to the recesses for reversibly detachable coupling with the flap part. The design of recesses on the flap part, with which the form-fitting elements on the holding part can correspond from both sides of the flap part, results in a simple design for an interchangeable arrangement of the holding parts on the flap part. Preferably, the recesses on the flap part are designed as material openings that completely penetrate the flap part, so that the positive locking elements formed on the holding part protrude through the recesses in the flap part, preferably onto the opposite side of the flap part. The holding part is therefore in contact with the flap part on both opposite sides.

A further development of the ventilation device provides that at least one of the recesses for the holding parts has an insertion opening for a positive locking element and a guide adjacent to the insertion opening, which interacts with an undercut on the positive locking element of a holding part. This means that the flap part is encompassed from both sides, which creates a secure connection between the holding part and the flap part. The guide adjacent to the insertion opening for the positive locking element is preferably designed as a guide slot into which a web section forming the undercut on the positive locking element is inserted for positive coupling with the flap part. Preferably, on each holding part, next to the form-fitting element, a locking hook which interacts with a further recess on the flap part is provided, which, after moving the form-fitting element in the guide of the associated recess into its holding position on the flap part, engages in the further recess and locks the holding part on the flap part effects. The locking hook is preferably used to secure a respective holding part in its assembly position on the flap part.

In one embodiment of the ventilation device, the housing is preferably made of expanded polystyrene or polypropylene. In a preferred embodiment, the housing of the ventilation device is made up of several parts, which simplifies its production, in particular the formation of the various supply air and exhaust air lines and the bypass lines in the housing.

In a preferred embodiment, the surface area of the flap part is larger than the cross section of the inlet openings of the bypass line in the supply air or exhaust air line formed in the housing. This ensures a secure closure of the inlet opening of the bypass line when the flap part has been moved into its closed position using the actuator.

Preferably, the area around the inlet opening of the bypass line or the inlet area of the bypass line is funnel-shaped. This means that the flow of outside or exhaust air carried in the supply air or exhaust air line is evened out in the event of a diversion via the bypass line. According to a preferred embodiment, it is provided that the ratio between the free cross section in the area of the inlet opening of the bypass line, i.e. near the flap part, and the free cross section in a subsequent section of the bypass line with a constant flow cross section is approximately 2:1.

A preferred development of the ventilation device provides that the housing has a longitudinal axis, and the bypass lines within the housing are preferably arranged rotationally symmetrically along the longitudinal axis and the flow adjusters within the housing are arranged mirror-symmetrically, in particular with respect to the longitudinal axis. The rotationally symmetrical design of the housing of the ventilation device ensures that both the supply air line in the housing and the exhaust air line in the housing of the ventilation device can be connected to an air line carrying an outside air flow, depending on any structural conditions in a building. The supply air line and the exhaust air line can fulfill the same advantageous functions, which simplifies the installation of such a ventilation device according to the invention at an installation site. Due to the mirror-symmetrical arrangement of the flow adjuster in particular in the housing in connection with the access only formed from one side of the housing into the interior of the housing, a simple change of the flow adjuster from the supply air line to the exhaust air line or in the opposite direction is possible. Preferably, access to the interior of the housing is formed on the front, with access being effected via at least one or a first and a second opening on the front of the housing. To ensure undisturbed access, the housing has a correspondingly large housing part that can be removed from the housing or a first and a second housing part with smaller dimensions compared to the single housing part.

According to a preferred development, the ventilation device has a blind part for temporarily closing, in particular, an inlet opening of at least the bypass line in the housing, which is set up to lead out the exhaust air/exhaust air flow. With the help of the blind part that can be inserted into the inlet area of the inlet opening of the bypass line, the bypass line can preferably be closed, which does not have to be used to guide the exhaust air flow past the heat exchanger. The blind part can, for example, be a cover part made of expanded polystyrene or polypropylene, which, when inserted into the inlet opening, completely closes it. A flap part that has already been pre-assembled in the ventilation unit can also be used as a dummy part. Instead of removing the entire flow adjuster from the housing, only the actuator is decoupled from the flap part arranged, for example, in the supply air line and then the actuator alone is coupled to the pre-assembled flap part in the exhaust air line.

For example, a flap part serving as a blind part can be held in its closed position closing the inlet opening of the bypass line using locking elements. The locking elements, which previously fixed the flap part in the exhaust air line, can now be used to fix the flap part in the supply air line.

In an alternative embodiment, it is provided on a ventilation device that preferably both bypass lines in the ventilation device are each equipped with a flow adjuster. A ventilation device equipped in this way then enables the outside air flow to be directed specifically past the heat exchanger in the supply air line and the exhaust air flow to the heat exchanger in the exhaust air line.

According to a second aspect, the object on which the invention is based is achieved by a method for mounting a ventilation device on a ventilation system with the features of claim 13. In particular, the method is characterized by the steps: Opening a (first) opening on the housing on one side of the housing of the ventilation device, dismantling a flow adjuster assigned to a first bypass line in the housing and removing the flow adjuster from the housing, preferably opening a further (second) opening on the housing on the same side of the housing of the ventilation device, and reinserting the flow adjuster via the single opening or the further (second) opening on the same side of the housing in the housing and mounting the flow adjuster in the area of a second bypass line in the housing.

In an independent form, according to the second aspect, the invention proposes a method for mounting a ventilation device on a ventilation system, with the help of which a ventilation device can be easily adapted to the structural conditions of a ventilation system existing in a building at the installation site. By only opening the housing on one side, the ventilation device can be converted quickly and without much effort, so that a supply air line that was originally intended to guide an outside air flow, within which a flow adjuster is/was provided to guide the outside air flow past the heat exchanger, now becomes one that leads out the exhaust air flow Exhaust air line, preferably without a flow adjuster, is converted. Preferably, in one embodiment of the method according to the invention, a blind part that closes the inlet opening in the exhaust air line is removed from the exhaust air line and is now inserted into the inlet opening of the bypass line assigned to the supply air line. In a preferred embodiment of the method according to the invention, the removal of the flow adjuster can be limited to the actuator being removed from a flap part in the supply air line and coupled to a flap part permanently arranged in the exhaust air line. Preferably, a flap part that is decoupled from the actuator and arranged in the supply air or exhaust air line is used as a blind part for permanently closing the inlet opening of the bypass line arranged in the supply air line or in the exhaust air line.

According to a preferred embodiment, the method according to the invention is further developed by one, several or all of the steps listed below: dismantling a blind part in the area of the second bypass line before reinserting the flow adjuster and installing the blind part in the area of the first bypass line; Removing a heat exchanger from the housing, and at least after reinserting the flow adjuster, reinserting the heat exchanger into the housing, and after dismantling the flow adjuster on the first bypass line in the housing, the flow adjuster having at least one flap part, which moves about a pivot axis by means of holding parts is held on the housing, and comprises an actuator coupled to the flap part in particular by means of one of the holding parts, one or more holding parts arranged on one side of the flap part are dismantled and then reassembled on the other side of the flap part. In particular, the holding parts arranged on the surface of the flap part facing away from a sealing surface are removed from the recesses formed on the flap part and arranged on the surface originally used as a sealing surface. The surface of the flap part that originally served as the mounting side is now used as a sealing surface for sealing the inlet opening on the other bypass line. When the flow adjuster is moved, a dummy part assigned to the unused bypass line is also moved in the device housing.

According to a preferred embodiment, it is provided that instead of replacing the holding parts on the flap part, the flap part is simply rotated perpendicular to its pivot axis, so that the holding part that originally corresponded to the actuator now interacts as a rotatably received bearing part with the holder in the housing opposite the actuator. With the design according to the invention, changing the flap part from one bypass line in the ventilation device to the other bypass line in the ventilation device is further simplified.

The preferred embodiments or developments described for the ventilation device according to the invention according to the first aspect are also preferred embodiments of the method according to the invention according to the second aspect, provided that they do not contradict each other. The preferred embodiments described for the second aspect of the ventilation device are also preferred embodiments of the ventilation device according to the first aspect. This means that the configurations described for the flow adjuster arranged or designed according to the invention have a direct influence on the method according to the invention for mounting a ventilation device on a ventilation system.

• 1: eine perspektivische Ansicht einer ersten Ausführungsform eines erfindungsgemäßen Lüftungsgerätes im Schnitt, ausgehend von der Gehäuse-Vorderseite;
• 2: eine perspektivische Ansicht des Lüftungsgerätes aus 1 im Schnitt vom Inneren des Gerätegehäuses aus auf die Gehäuse-Vorderseite;
• 3: eine perspektivische Ansicht des Durchflusseinstellers gemäß der Einzelheit III in 2;
• 4: eine perspektivische Ansicht des Lüftungsgerätes ohne den Wärmetauscher und den Durchflusseinsteller im Inneren des Gehäuses;
• 5: eine Ansicht des im Inneren des Gehäuses verwendeten Klappenteiles, und
• 6 und 7: Einzelansichten des Klappenteiles und eines am Klappenteil demontieren Halteteiles.

The invention is described in more detail below using a preferred exemplary embodiment of a ventilation device with reference to the attached figures. Show here:

• 1 : a perspective view of a first embodiment of a ventilation device according to the invention in section, starting from the front of the housing;
• 2 : a perspective view of the ventilation device 1 in section from the inside of the device housing to the front of the housing;
• 3 : a perspective view of the flow adjuster according to detail III in 2 ;
• 4 : a perspective view of the ventilation device without the heat exchanger and the flow adjuster inside the housing;
• 5 : a view of the flap part used inside the housing, and
• 6 and 7 : Individual views of the flap part and a holding part that can be dismantled from the flap part.

1 shows a perspective embodiment of a ventilation device 100 with a housing 102 that has a supply air line 104 and an exhaust air line 106. The supply air line 104 has an outside air inlet 108, a supply air outlet 110 and the exhaust air line 106 has an exhaust air inlet 112 and an exhaust air outlet 114.

A fan unit 150 for generating an outside air/supply air stream 116 in the supply air line 104 and a fan unit 150 for generating an exhaust air/exhaust air stream 118 in the exhaust air line 106 are arranged in the housing 102. A heat exchanger 120 is also arranged in the housing 102 and is designed to transfer heat between the outside air flow 116 guided in the supply air line 104 and the exhaust air flow 118 guided in the exhaust air line 106.

A filter element 122 is arranged in the supply air line 104, by means of which the outside air flow is cleaned. In addition, a bypass line 130 is provided within the housing for guiding a bypass air flow 132 past the heat exchanger. The bypass line 130 has an inlet opening 134, which is arranged in a section of the supply air line 104 between the filter element 122 and the heat exchanger 120. The inlet opening 134 of the bypass line 130 is thus arranged downstream of the filter element 122 and upstream of the heat exchanger 120, in particular upstream of an inlet area 124 of the heat exchanger 120 in the supply air line 104.

In the area of the inlet opening 134 of the bypass line 130, a flow adjuster 136 with a flap part 140 is arranged, which can be moved back and forth between a closed position (inlet opening 134 closed) and an open position (inlet opening 134 completely open). The flow adjuster 136 can be used to adjust the proportions of the outside air flow that flow via the bypass line 130 or continue to be conducted via the heat exchanger 120.

The flow adjuster 136 has an actuator 138 ( 3 ), by means of which the flap part 140 can be pivoted. In the in 1 In the embodiment shown, the flap part 140 is shown in an intermediate position, so that parts of the outside air or exhaust air flow 160 flow through both the heat exchanger 120 and the bypass line 130. The flap part 140 is designed and arranged in the supply air line 104 in such a way that the flap part 140 in its open position, i.e. when fully opened, completely covers the inlet area 124 of the heat exchanger 120 in the supply air line 104.

How out 1 Furthermore, it can be seen that the bypass line 130 in the housing 102 runs laterally and below the heat exchanger 120. The bypass line 130 has a substantially vertical line section 144, which runs approximately parallel to a side surface of the housing 102, and one which is angled at approximately 90° horizontally extending line section 146, which runs approximately parallel to the bottom surface of the housing 102. The bypass line 130 has an outlet opening 148, which is arranged in a section of the supply air line between the outlet area 126 of the heat exchanger 120 in the supply air line and a suction area 152 of the fans 150 in the supply air line 104. The housing 102 has an upper housing part 102' and a lower housing part 102".

How 2 As can be seen, a filter element 122 can be arranged in the supply air line 104 and in the exhaust air line 106 in the ventilation device 100. In 2 However, in particular the ventilation device 100 is shown from the inside of the housing towards the front of the housing 160. As can be clearly seen, the actuator 138 of the flow adjuster 136, which adjusts the flap part 140 and is used for pivoting the flap part 140, is arranged on the inside of the front side 160. According to the invention, two bypass lines 130, 130 '( 4 ) intended to guide a bypass air flow past the heat exchanger.

In addition, at least one opening, not shown in detail, is provided on the front of the housing 160, shown from the inside of the ventilation device 100, as access to a receptacle 162 for the flow adjuster 136, the receptacle 162 being compatible with the flow adjuster 136, in particular its actuator 138, is designed so that one and the same flow adjuster can be reversibly inserted into a respective receptacle 162 from the front of the housing 160.

According to one embodiment, in particular a single, sufficiently large opening is provided on the front side of the housing 160 as access to the interior of the housing or several, a first and a second opening on the housing 102, via which the respective receptacles 162 for the flow adjusters can be reached. In particular, it is provided that two spaced-apart receptacles 162 are provided on the same housing side 160 for at least the actuator that moves the flap part. In particular, the receptacles 162 are assigned to one of the respective bypass lines 130 130 '.

Like from the 3 and 4 As an example, the receptacles 162 for the actuator 138 have recesses 164 formed on the inside of the housing 102 defining the areas of the supply air and exhaust air lines 104, 106. In particular, the recesses 164 are formed in a section of a housing part (not shown) which releases the opening to the receptacles 162. How further 3 shows, the flap part 140, which is shown in its closed position closing the inlet opening 134, has a first holding part 166 for a rotationally fixed connection to the actuator 138. Furthermore, there is a second holding part 168 on the flap part ( 5 ) is provided, which cooperates for a rotatable connection with a holder, not shown, on the inside of the housing 102, in particular on the back of the housing.

The first and second holding parts 166, 168 are arranged at opposite ends 170, 170' of the flap part 140. Each of the holding parts 166, 168 has an axle journal 172, the axle journals 172 in the presently shown embodiment extending coaxially to one another and defining the pivot axis for the flap part 140.

The first holding part 166 and the second holding part 168 in particular have plug-in receptacles 174, 176, which can be brought into operative connection with a drive shaft, not shown, of the actuator 138 or with the holder, not shown, on the housing 102, which is arranged opposite the actuator 138 . The holding parts 166, 168 are designed to be plugged or plugged onto the drive shaft of the actuator or into the holder via the plug-in receptacles 174, 176.

In one embodiment, the housing 102 has a longitudinal axis 200, which runs parallel to the inlets 108, 112 and to the outlets 110, 114 of the supply air and exhaust air lines 104, 106. The bypass lines 130, 130' are preferably arranged rotationally symmetrically along the longitudinal axis 200 within the housing 102. The flow adjuster 136, in particular the receptacles 162, 162 'receiving the flow adjuster for the flow adjuster 136, are arranged mirror-symmetrically within the housing with respect to the longitudinal axis 200. This simplifies in particular the removal from, for example, the supply air line 104 and the reinsertion of the flow adjuster 136 into the exhaust air line 106.

Like from the 6 and 7 As can be seen, the holding parts 166, 168 are set up for reversibly detachable coupling with the flap part 140.

In order to be able to couple the holding parts 166, 168 with the flap part 140, the flap part 140 has recesses 178 and the holding parts 166, 168 have positive locking elements 180, which each correspond to the recesses 178 in the flap part 140. The holding parts 166, 168 can be inserted into the recesses 178 with their positive locking elements 180 from both sides of the flap part 140. The recesses 178 designed as a material opening in the flap part 140 have an insertion opening 182 for inserting the positive-locking element 180 and a guide slot 184 adjacent to the insertion opening. The guide slot 184 cooperates in particular with an undercut on the holding parts 166, 168 designed as a material web 186.

Furthermore, a further recess 188 in the form of a material opening is provided on the flap part 140 adjacent to the recesses 178, with which a locking hook 190, which is also formed on the holding part 166, 168, cooperates. After inserting the positive locking element 180 into the recess 178 and bringing the positive locking element 180 into its holding position on the flap part 140, the locking hook 190 then engages directly into the recess 188 on the flap part 140 and locks the holding part 166, 168 on the flap part 140.

List of reference symbols:

100

Ventilation unit

102

Housing

102`

Top

102"

Bottom part

104

supply air line

106

Exhaust air line

108

Outside air intake

110

Supply air outlet

112

Exhaust air inlet

114

Exhaust air outlet

116

Outside airflow

118

Exhaust air flow

120

Heat exchanger

122

Filter element

124

Entry area

126

Exit area

130, 130`

Bypass line

132

Bypass airflow

134

Inlet opening

136

Flow adjuster

138

Actuator

140

flap part

144, 146

line section

148

Exhaust opening

150

Fan unit

152

Intake area

160

Case front

162, 162'

Recordings

164

recess

166, 168

holding part

170, 170`

End

172

axle journal

174, 176

Plug-in receptacle

178

recess

180

Positive locking element

182

Insertion opening

184

guide

186

material bridge

188

recess

190

Latching hook

200

Longitudinal axis

Claims (14)

Ventilation device (100) for building services with heat recovery, comprising - a housing (102), - a supply air line (104) arranged in the housing (102), - an exhaust air line (106) arranged in the housing (102), - a heat exchanger (120) for transferring heat between an outside air flow (116) guided in the supply air line (104) and an exhaust air flow (118) guided in the exhaust air line (106), - a bypass line (130) assigned to the supply air line (104) for guiding a bypass air flow (132) past the heat exchanger (120), wherein the bypass line (130) in the supply air line is assigned a flow adjuster (136), and, - a bypass line (130`) assigned to the exhaust air line (106) for guiding a bypass air flow (132) past the heat exchanger (120) , characterized in that at least one (first) opening is provided on one side (160) of the housing (102) as access to a receptacle (162) for the flow adjuster (136) in the housing (102), via which the flow adjuster (136 ) can be removed from the receptacle (162), and wherein the (first) opening on the housing (102) is designed in such a way or a further (second) opening on the same side of the housing (160) as access to one of the bypass line (130 ') in the exhaust air line ( 106) associated further receptacle (162') is provided, the further receptacle (162') being designed to be compatible with the flow adjuster (136), so that one and the same flow adjuster (136) can be inserted into the respective receptacles from the same housing side (160). (162, 162') can be used reversibly. ventilation device Claim 1 , characterized in that the flow adjuster (136) has a flap part (140) movable about a pivot axis and an actuator (138) coupled to the flap part (140), with two spaced-apart receptacles (162, 162`) on the same housing side (160). ), whereby one of the receptacles (162, 162 ') is assigned to one of the respective bypass lines (130, 130')) and is provided for at least the actuator (138) moving the flap part (140). ventilation device Claim 2 , characterized in that the receptacles (162, 162`) for the actuator (138) are designed as recesses (164) on the inside of the housing (102) defining the area of the supply air and exhaust air lines. ventilation device Claim 2 or 3 , characterized in that the flap part (140) has a first holding part (166) for a rotationally fixed connection to the actuator (138) and a second holding part (168) for a rotatable connection to a holder on the inside of the housing (102). ventilation device Claim 4 , characterized in that the first and second holding parts (166, 168) at opposite ends (170, 170`) of the flap part (140) are arranged and each have an axle journal (172), the axle journals (172) preferably running coaxially to one another and defining the pivot axis for the flap part (140). ventilation device Claim 4 or 5 , characterized in that the first holding part (166) and the second holding part (168), in particular their axle journals (172), each have plug-in receptacles (174, 176) which are connected to a drive shaft of the actuator (138) or opposite the actuator arranged holder on the housing (102) can be brought into operative connection. Ventilation device according to one of the Claims 4 until 6 , characterized in that the holding parts (166, 168) are set up for reversibly detachable coupling to the flap part (140), in particular to both surfaces of the flap part (140). Ventilation device according to one of the Claims 4 until 7 , characterized in that the flap part (140) has recesses (178, 188) for the holding parts (166, 168) which can be arranged on both sides of the flap part (140), and the holding parts (166, 168) each have the recesses (178) have corresponding positive locking elements (180) for reversibly detachable coupling with the flap part. ventilation device Claim 8 , characterized in that at least one of the recesses (178) for the holding parts (166, 168) has an insertion opening (182) for a positive locking element (180) and a guide adjacent to the insertion opening (182), which has an undercut on the positive locking element ( 180) of a holding part (166, 168) interacts. Ventilation device according to one of the Claims 1 until 9 , characterized in that the housing (102) is at least partially formed from an expanded polystyrene (EPS), the housing (102) preferably being in several parts. Ventilation device according to one of the Claims 1 until 10 , characterized in that the housing (102) has a longitudinal axis (200), and the bypass lines (130, 130`) within the housing (102) are preferably rotationally symmetrical along the longitudinal axis (200) and the flow adjusters (136) within the housing ( 102) are arranged mirror-symmetrically, in particular to the longitudinal axis (200). Ventilation device according to one of the Claims 1 until 11 , further comprising a blind part for temporarily closing in particular an inlet opening (134) of at least the bypass line (130, 130`) in the housing (102), which is set up to lead out the exhaust air/exhaust air flow (118). Method for assembling a ventilation device, in particular a ventilation device (100). Claim 1 , to a ventilation system, comprising the steps: - opening a (first) opening on the housing (102) on a housing side (160) of the ventilation device (100), - dismantling a flow adjuster assigned to a first bypass line (130) in the housing (102) ( 136) and removing the flow adjuster (136) from the housing (102), - preferably opening a further (second) opening on the housing (102) on the same housing side (160) of the ventilation device (100), and - reinserting the flow adjuster (136) via the first access or the further access on the same side of the housing (160) into the housing (102) and mounting the flow adjuster (136) in the area of a second bypass line (130`) in the housing. Procedure according to Claim 13 , comprising one, several or all of the steps listed below: - dismantling a blind part in the area of the second bypass line (130`) before reinserting the flow adjuster (136) and installing the blind part in the area of the first bypass line (130); - Removing a heat exchanger (120) from the housing (102), and at least after reinserting the flow adjuster (136), reinserting the heat exchanger (120) into the housing, and - wherein after dismantling the flow adjuster (136) on the first bypass line (130) in the housing, wherein the flow adjuster comprises at least one flap part (140), which is held in the housing (102) so that it can move about a pivot axis by means of holding parts (166, 168), and an actuator (138) coupled to the flap part, one or several holding parts (166, 168) arranged on one side of the flap part (140) are dismantled and then mounted on the other side of the flap part (140).

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