EP4015932B1 - Exterior wall grid for a wall passage unit for the connection of a domestic technology device - Google Patents

Description

The invention relates to an external wall grille for a wall feedthrough unit for the connection of a domestic appliance, with the features of the preamble of claim 1.

Building technology devices, in particular heat pumps, multifunctional devices according to DIN EN 16573 or central ventilation devices that are installed inside buildings, require a wall duct to the outside through which the required supply air can be supplied and the exhaust air can be removed. For this purpose, at least one end of an air line is provided on the heat pump or the central ventilation device and the other end is attached to a wall duct.

A depth-adjustable wall duct unit is available from the EN 10 2017 002 396 A1 known. An external part is attached from the outside of the building and an internal part from the inside of the building. The external part also includes an external wall grille and a small animal protection grille. The flow channel is formed within two pipe sockets that can be telescoped against each other and moved against each other in order to be able to adapt to the individual wall thickness of a building wall. When building prefabricated houses, however, the wall thickness is known within narrow tolerance ranges, so that an adjustment of the depth of the flow channel is not necessary. The use of the known wall feedthrough unit then has the disadvantage that a not inconsiderable portion of the cross-section of the wall opening is blocked for air flow due to the unnecessary length adjustment. For a certain required volume flow, a large wall opening must therefore be created so that the flow cross-section in the wall feedthrough unit is sufficiently large. In addition, when building prefabricated houses, high requirements must be met for protection against water ingress, in particular protection against water that runs behind a defective sealing layer or penetrates through driving rain. Furthermore, the installation of a known wall feedthrough unit requires a lot of assembly time in order to carefully seal all the joints.

It is therefore the object of the present invention to provide an external wall grille for a wall duct for the connection of a building services device, which enables reliable sealing and simple and convenient installation on building walls, in particular in prefabricated components of prefabricated houses.

This object is achieved by an external wall grille with the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

Domestic appliances that take in or expel air from the outside of a building include, in particular, an indoor heat pump, multifunctional devices in accordance with DIN EN 16573 or a ventilation unit.

For an optimized sealing and air flow concept, the external wall grille according to the invention provides at least one additional slat that is glued or welded to the back of the upper crossbar of the frame, so that the additional slat extends from a point outside the wall connection plane into the interior of the flow channel. The additional slat thus complements the inner frame like a lid. From an air-technical point of view, the additional slat is advantageous in order to close the flow channel at the top. With regard to the tightness of the external wall grille, the additional slat has a dual function: any water that may penetrate the wall connection level from above reaches the additional slat and is initially drained inwards via this. At the end of the additional slat, the water can drip onto the top slat in the external wall grille and thus reach the outside again via the wall connection level. This labyrinth concept of additional slat and upper slat simultaneously creates a flow-technical closure at the top, but also creates water permeability.

Furthermore, in the improved sealing concept in the wall bushing unit according to the invention, it is provided to back the frame with polyethylene foam sealing strips and to provide an additional swelling tape sealing strip on the back of the foam sealing strips, which are to be assigned to the wall surface.

The external wall grille is a finished unit, preferably made of stainless steel or aluminum sheet. An inner frame extends a little into the depth of the flow channel. The inner frame is surrounded by a frame all around. Several slanted slats are arranged within the inner frame.

The external wall grille is combined with a holding frame that is attached to a wall duct. The holding frame is inserted after the wall bushing has been manufactured. Reinforcement and plaster layers can then be applied to the wall, which enclose the holding frame. After the wall surface on the outside of the building has been completely processed, the final step is to put the external wall grille in place. To do this, the external wall grille simply needs to be inserted into the area already specified by the holding frame. An inner frame of the The external wall grille is pushed between the fastening tabs of the holding frame. In those areas in which the fastening tabs of the holding frame overlap with the fastening tabs of the outer wall grille, a positive connection can be established, through which the outer wall grille is attached to the holding frame and, via this, indirectly to the wall duct element.

The fastening points are offset inwards from a wall connection level, i.e. within the flow channel. In particular, it is intended to use two screws per fastening tab on the holding frame fastening bottles and to provide elongated holes on the inner frame of the external wall grille on the rear edge. This means that the external wall grille only needs to be pushed with its elongated holes under the screw heads on the previously mounted holding frame. The screws are tightened, which means that the external wall grille is firmly and securely attached. Small tolerances in the plaster layer can be compensated for by creating the fastening recesses in the form of elongated holes. The screw connections are preferably arranged in such a way that they are covered by the slats in the external wall grille and are therefore usually not visible in a front view. The concealed screw connection in the flow channel also has the advantage that there are no miter cuts, rivets, etc. on the frame that could be visually disturbing and through which water could penetrate.

Because the fastening points for the external wall grille are positioned on those parts of the support frame that extend into the flow channel, no additional fastening elements need to be subsequently attached to the outside of the facade. Protective layers already applied there remain completely undamaged by the installation of the external wall grille, while at the same time ensuring that the external wall grille is easy to attach and that it is permanently connected to the other parts of the wall feedthrough unit.

It is preferably provided to combine the external wall grille with the holding frame and an adapted wall duct element and thereby create an optimized wall duct unit. The three-part design of the wall bushing unit makes assembly particularly easy. In addition, the construction of the wall duct unit can be completed gradually as the construction of the associated part of the building progresses.

To assemble the wall duct unit, a wall duct element, which is in particular a cuboid body made of EPS plastic foam, is advantageously first inserted into a wall recess. In the case of prefabricated houses, the wall recess can be formed from the outset by recesses in the walls, or they can be made into the wall later. The wall duct element is then inserted into the wall cutout and, for example, glued into it, so that an airtight connection is created. The wall duct element advantageously closes flush both on the inside of the building and on the outside of the building.

In the following assembly step, the holding frame is put on. For this purpose, a holding frame outer element is provided, which is preferably flush with the end face of the wall duct element. The connection between the holding frame and the wall duct element is made via screws that engage in dowels, which are either screwed into the hardened EPS plastic foam after foaming or which have been foamed directly into the wall duct element.

The wall feedthrough element and the support frame can also be delivered as a fully assembled unit for use in finished building sections, since no adjustment work on the wall feedthrough element is necessary in this application.

The retaining frame outer element can then advantageously be covered with reinforcing mesh and/or plastered, resulting in a top wall layer in which the retaining frame outer element is embedded. This means that water running off the building wall can only reach the outside via the plaster surface, but no longer into the space between the retaining frame outer element and the front side of the wall feed-through element.

The parts of the support frame that extend into the flow channel are preferably provided with small animal protection grille fastening bottles into which a small animal protection grille can be hung. Alternatively, a small animal protection grille can also be attached to the external wall grille behind the slats. However, the connection to the support frame has the advantage that the flow channel can be closed off during gradual assembly according to the respective construction progress without the external wall grille having to be attached at an early stage. This advantage arises less when building parts for prefabricated houses, but above all when a wall feed-through element is subsequently installed in a building wall.

A preferred embodiment also provides that at least one collecting surface is formed in the lower region of the flow channel outer section, which ends at a drip edge. The drip edge in turn protrudes over a lower flow channel surface. The lower flow channel surface is preferably designed to slope obliquely outwards. The fastening means for connecting the outer wall grille to the holding frame are arranged above the collecting surface, as are the rear edges of the slats in the outer wall grille. The small animal protection grille is also arranged above the collecting area in the flow channel. Water that comes in either through driving rain or in a supply air operation of the building services system is sucked in, can drip off at the points mentioned and thus reaches the collecting surface and from there to the outside via further slats or draining boards beyond the wall connection level.

The ease of assembly of the wall duct unit according to the invention in prefabricated house construction is advantageously achieved by the fact that the wall duct element and the holding frame can already be installed in the factory during the production of the building part. All elements necessary for sealing and draining behind water are integrated into the external wall grille. In the case of the building made from prefabricated parts, the only assembly step in relation to the wall bushing unit is to place the external wall grille and secure it with the four pre-positioned screws. No further work is necessary on either the external wall grille or the building itself. At the same time, it is impossible for seals to be missed or carried out incorrectly due to carelessness.

To optimize the air flow in the flow channel, the flow channel inner section with a round, in particular an ellipsoidal cross-section is designed to transition continuously into the flow channel inner section with the rectangular or polygonal cross-section. This means that large offset surfaces that would be perpendicular to the flow direction and generate turbulence are avoided at the transition.

In order to separate moisture sucked in during supply air operation in the wall duct unit as far as possible, it can be provided to form parts of the flow channel with at least one small offset step. This prevents in particular the formation of a film of moisture adhering to the wall that is sucked into the system.

Furthermore, it can be provided that the central axis of the flow channel rises from the outside of the building to the inside of the building, in such a way that so that all parts of the inner wall in the flow channel have a gradient towards the outside.

The outer holding frame part can be designed as a frame made of sheet metal without recesses.

The small animal protection grille is preferably held interchangeably on the holding frame. This allows it to be removed for cleaning purposes. It can also be exchanged for a grid with a different mesh size, e.g. B. on buildings where high humidity and low temperatures can cause icing on the small animal protection grille in winter.

The small animal protection grille is preferably made as a stamped part from sheet metal. A certain degree of stiffening is achieved by embossed ribs and/or vertical or rolled outer edges. If the stamped part is bulbous, the convex side is aligned towards the inside of the building, i.e. away from the outer wall grille, so that these parts do not touch.

Fig. 1

eine Wanddurchführungseinheit in einer perspektivischen Explosionsansicht, von einer Gebäudeaußenseite aus gesehen;

Fig. 2

ein Wanddurchführungselement und ein Halterahmen in einer perspektivischen Ansicht von der Gebäudeaußenseite her;

Fig. 3

ein Außenwandgitter in frontaler Ansicht von der Gebäudeaußenseite her;

Fig. 4

ein Außenwandgitter in frontaler Ansicht auf seine Rückseite;

Fig. 5

eine vergrößerte Detaildarstellung des linken oberen Eckenbereichsaus Fig. 4;

Fig. 6

das Außenwandgitter in seitlicher Schnittansicht;

Fig. 7

eine Detailansicht aus dem oberen Bereich von Figur 6;

Fig. 8

eine perspektivische Ansicht auf die Rückseite eines Außenwandgitters mit Halterahmen;

Fig. 9

eine perspektivische Ansicht auf das Außenwandgitter von schräg oben;

Fig. 10

eine Verbindung eines Kleintierschutzgitters mit dem Halterahmen im Detail;

Fig. 11

die vollständig montierte Wanddurchführungseinheit in seitlicher Schnittansicht, und

Fig. 12

ein Detail einer perspektivischen Schnittansicht der Wanddurchführungseinheit.

The invention is explained in more detail below with further advantageous embodiments using the embodiment shown in the drawings. The figures show in detail:

Fig.1

a wall duct unit in an exploded perspective view, seen from a building exterior;

Fig.2

a wall duct element and a retaining frame in a perspective view from the outside of the building;

Fig.3

an external wall grille in frontal view from the outside of the building;

Fig.4

an external wall grille in frontal view of its rear side;

Fig.5

an enlarged detail of the upper left corner area Fig.4 ;

Fig.6

the external wall grille in side section view;

Fig.7

a detailed view from the upper part of Figure 6 ;

Fig.8

a perspective view of the back of an external wall grille with retaining frame;

Fig.9

a perspective view of the exterior wall grille from above;

Fig.10

a connection of a small animal protection grille with the holding frame in detail;

Fig. 11

the fully assembled wall duct unit in side sectional view, and

Fig. 12

a detail of a perspective sectional view of the wall duct unit.

Figure 1 shows a possible application for an external wall grille 210 designed according to the invention. It is shown here together with a holding frame 230 and a wall duct element 110 in a perspective exploded view, seen from the outside of a building.

For assembly, the cuboid wall bushing element 110 is inserted into a wall cutout in a building. The wall duct element 110 is made in particular from EPS foam to ensure heat conduction is interrupted from the outside of the building to the inside of the building. Inside the wall duct element 110, a flow channel 120 is formed, which is divided into an inner flow channel section 121 with a round cross section and an outer flow channel section 122 with a rectangular cross section. The cross sections 121, 122 continuously merge into one another; Offset surfaces that are perpendicular to the direction of flow are avoided. In the flow channel outer section 122, a shoulder is formed on the underside as a collecting surface 123, which is arranged above a lower flow channel surface 125 that slopes obliquely outwards and which protrudes outwards beyond this.

The holding frame 230 consists of a holding frame outer element 231, which is perforated in the manner of a cleaning rail. Fastening tabs 232 extend perpendicularly to this into the flow channel. These partially extend even further into the depth and form small animal protection grid fastening tabs 234. A small animal protection grid 235 is held to them.

The outer frame element 232 can be attached to fastening holes 116 on an outer front surface 115 of the wall feedthrough element 110. Dowels are screwed in to reinforce the fastening holes 116. The last step in assembly is to place the outer wall grille 210 on the holding frame 230, whereby fastening recesses (not visible here) on the outer wall grille 210 engage under the fastening screws 233, which are positioned in threads or holes on fastening tabs 232 of the holding frame 230.

Grooves 117 are formed in the side surfaces of the flow channel outer section 122 in order to accommodate protruding portions of the fastening screws 233 on the holding frame 230. As a result, the fastening tabs 232 of the holding frame 210 can be positioned close to the side walls of the flow channel outer section.

Figure 2 shows the addition of the external wall grille 210 with the holding frame 230, as in Fig. 1 in a perspective view from the outside of the building. A holding frame outer element 231 rests on the front, outer end face 115 of the wall duct element 110. A small animal protection grille 235 is arranged above the collecting surface 123 in the flow channel. The collecting surface 123 ends at a drip edge 124 above the lower flow channel surface 125, which has rising outer areas 126 on both sides.

In Fig. 3 the external wall grille 210 is shown in a frontal view from the outside of the building. The outer wall grille 210 has a frame 216, which is intended to rest on the outside of the wall and which stands on a drip rail 229. Towards the front, towards the outside, the frame has a front mirror surface 225. The drip strip 229 covers plaster and / or insulation layers below the wall duct element on which the external wall grille 210 is placed.

The grid structure of the external wall grid 210, which covers the flow channel in the wall duct element, consists of several slats 211, 213, 214, which slope downwards towards the outside and which overlap each other in the projection onto the wall plane to such an extent that there are no open cross-sectional areas. This prevents driving rain from penetrating the flow channel. In the external view, an upper slat 211 and several middle slats 213 appear the same. Only a lower slat 214 differs in that it extends outwards beyond the plane of the frame 216 and also has lateral projections 215.

In Figure 4 the external wall grille 210 is shown in a frontal view of its rear side. An inner frame 220 is provided within the frame 216, which is connected to the frame 216 and is aligned perpendicularly thereto. The inner frame 220 comprises parallel lateral inner frame parts 221, between which the slats 211, 213, 214 are held.

The frame 216 has an inner mirror surface that is intended to be placed on the outside of the building wall and is covered with at least one sealing strip 218. In the illustrated embodiment of the external wall grille 210, all four mirror surfaces are completely covered with sealing strips 218. These are PE foam sealing strips that are provided with miter cuts in the corner areas. Additional expansion tape sealing strips 217 are placed on the edges of the sealing strips 218.

Figure 5 is an enlarged detailed view of the upper left corner area Figure 4 . The side inner frame parts 221 have several punched outs into which z. B. lugs 211.1 of the upper slat 211 are inserted.

The frame 216 consists of sheet metal whose outer edge is bent perpendicular to the mirror surface. As a result, a mirror surface limited on both sides for receiving the sealing strips 217, 218 is formed between the outer edge of the frame 216 and the inner frame 220.

The swelling tape sealing strip 217 on the top runs across the entire width of the outer wall grille 210. If water running off on the building facade in the corner area of the outer wall grille 210 is not already retained on the swelling tape sealing strip 217, it will be in the miter plane between the sealing strips 218 directed below. It is important for this that the miter plane ends on the upper edge of the side inner frame parts 221 or is even further inward, i.e. above the slats. This ensures that water flows to the sides Inner frame parts 221 is guided downwards and drips there within the flow channel, where the step is formed by the collecting surface 123. However, water cannot run behind the sealing strips 217, 218 and along the side sections of the frame 216.

Figure 6 shows a section through the middle of the outer wall grille 210. The elongated holes that are open to the rear are clearly visible here and are used to easily attach the outer wall grille 210 to the fastening screws 233 of the holding frame 230 (see Figure 2 ) serve. The frame 216 is backed with sealing strips 218. Additionally applied to this are the swelling tape sealing strips 217, which are relatively thin in relation to the sealing strips 218. The rear surfaces of the sealing strips 217, 218 form a mirror surface 219 on the back of the frame 216, which is used to rest the outer wall grille 210 on the outer wall surface of the building. which forms a wall connection level W.

A recess 224 is made in the lower area of each of the lateral inner frame parts 221. The step in the flow channel projects into this recess after the outer wall grille has been supplemented with a complete wall feedthrough unit.

An important element for achieving safety against water that may run behind the expansion tape sealing strips 217 is an additional slat 212. This is located under the upper section of the frame 216 and, unlike the other slats 211, 213, 214, slopes towards the flow channel, i.e. towards the inside of the building.

An additional sealing strip 223 is provided on the outside of the side inner frame parts 221. Its meaning is explained below with reference to Figure 11 explained in more detail.

Figure 7 is a detailed view from the upper part of Figure 6 . The path of the water that runs behind a possibly damaged sealing line between the wall connection level W and the expansion tape sealing strip 217 is marked with the dotted line. It is safely guided away from the rear mirror surface 219 on the frame 216, which is equivalent to a wall connection level W, by means of the additional slat 212. This initially guides the water over the wall connection level W into the interior of the flow channel. There it can then drip onto the upper slat 211. To force dripping, the lower edge of the slat 211 is folded over. The lower edges of the other slats are also designed accordingly.

Figure 8 is a perspective view of the back of the external wall grille 210, which is combined here with the holding frame 230 and the small animal protection grille 235. The holding frame outer element 231 rests on the mirror surface of the frame 216 of the external wall grille 210. Since the holding frame outer element 231 is placed on the wall surface and plastered in, the wall connection plane W runs between the holding frame outer element 231 and the frame 216.

The inner frame 220 of the outer wall grille 210 extends into the opening in the outer holding frame element 231. As a result, the side inner frame parts 221 of the outer wall grille 210 rest on the fastening tabs 232 of the holding frame 230. A firm connection is made via the fastening screws 233 as soon as the outer wall grille 210 has been pushed onto the holding frame 230, which was previously installed together with the wall bushing and, if necessary, already plastered.

Two small animal protection grille fastening tabs 234 are formed on the holding frame fastening tabs 232, which extend beyond the rear edge of the side inner frame parts 221 of the outer wall grille 210 into the interior of the flow channel. The small animal protection gate 235 is hung there.

• Die Zusatzlammelle 212 schließt sich an die Innenrahmenteile 221 an und schließt so den Innenrahmen nach oben hin wie ein Deckel ab.
• Die Zusatzlamelle 212 erstreckt sich von der Innenseite des Blendrahmens 216 über die Wandanschlussebene E hinweg auf die obere Lamelle 211 zu.
• Zur oberen Lamelle 211 wird ein kleiner Spalt als Abstand gewahrt, der zwar für die Luftströmung keine wesentliche Bedeutung hat, aber das Abfließen von in der Wandanschlussebene W möglicherweise eintretendem Wasser auf die obere Lamelle 211 ermöglicht.

In Figure 9 The external wall grille 210 is shown as seen from above. The position and function of the additional slat 212 are particularly clear:

• The additional slat 212 is connected to the inner frame parts 221 and thus closes the inner frame at the top like a lid.
• The additional slat 212 extends from the inside of the frame 216 across the wall connection level E towards the upper slat 211.
• A small gap is maintained as a distance to the upper slat 211, which is not essential for the air flow, but allows water that may enter the wall connection plane W to flow off onto the upper slat 211.

Figure 10 shows the connection of the small animal protection grille 235 with the holding frame fastening tabs 232 in detail. The small animal protection grille 235 includes, in addition to a grid surface 236 in which the webs are kept as thin as possible in order to achieve a large flow-through cross-section, also a wider and partially folded edge area, which gives the small animal protection grille 235 stability. Hooks 237 are punched out on the edge area, which can be inserted into recesses in the small animal guard fastening tabs 234. The small animal protection grille 235 is therefore positively but interchangeably connected to the holding frame.

Figure 11 shows the fully assembled wall feedthrough unit 100 in a lateral sectional view, in order to illustrate in particular the positioning of the parts relative to one another in depth, i.e. in the longitudinal direction of the flow channel.

The flow direction can be for the supply air from the outside of the building, which Figure 11 left, to the right, towards the inside of the building. In this case, the flow channel 120 in the wall duct element 110 is convergent. For the exhaust air, the flow direction is reversed, so that the flow channel 120 is divergent. A wall duct unit 100 designed according to the invention is suitable for both operating modes in an unchanged manner.

It is important that the collecting surface 123 is formed at the bottom of the flow channel outer section 121, which ends at an overhanging drip edge 124. Because the side frame part 221 on the outer wall grille 210 each has a recess 224 on both sides, the drip edge 124 can extend over the entire width of the flow channel and thus laterally over the inner frame of the outer wall grille 210. The drip edge 124 is located above the lower slat 214, which is also the in Figure 1 visible inclined surface 125 in the wall bushing element 110 is covered. The lower slat 214 protrudes outwards over the frame 216 and the wall connection level, so that water that penetrates somewhere in the upper area of the outer wall grille 210 either drips directly onto the lower slat 214 or first onto the step 123 of the flow channel 120 and from there reaches the lower slat 214 via the drip edge 124.

• das Kleintierschutzgitter 235 und dessen Aufhängepunkte am Halterahmen 230;
• Öffnungen in den seitlichen Innenrahmenteilen 221 des Außenwandgitters wie z. B. Ausstanzungen zur Lamellenbefestigung;
• Bohrungen für die Befestigungsschrauben 233;
• die rückwärtigen Kanten aller Lamellen 211, 212, 213, 214;
• die rückwärtigen Kanten des Innenrahmens 220 des Außenwandgitters 210.

It is also essential that the following elements or points at which water could enter are relocated from the wall connection level W into the interior of the flow channel 120 and are located above the collecting surface 123 in the flow channel 120:

• the small animal protection grid 235 and its suspension points on the support frame 230;
• Openings in the lateral inner frame parts 221 of the outer wall grille, such as punched-out holes for fastening slats;
• Holes for the fastening screws 233;
• the rear edges of all slats 211, 212, 213, 214;
• the rear edges of the inner frame 220 of the outer wall grille 210.

Wherever water could enter, the water is therefore not led directly to the outside according to the invention, but is always led via the collecting surface 123 in the flow channel and from there to the lower slat 124 and/or the lower flow channel surface 125 of the wall feedthrough element 110 and finally via the drip strip 219 away from the wall connection plane W. This diversion ensures above all that water always reaches an area in the center of the flow cross-section and flows downwards from there, but does not flow to the outside of the wall feedthrough element 110, where other building parts 1 are connected to the wall feedthrough element 110.

In Figure 12 A detailed view is shown, which is a section of a perspective sectional view of the wall bushing unit 100. The cutting plane is aligned normal to the flow direction and is located in the flow channel outer section 122 of the wall duct element 110. The respective lower area of the side inner frame parts 221 of the outer wall grille 210 and the holding frame fastening tabs 232 are visible. These are connected to one another via the fastening screw 233.

In this view, it can be seen that the collecting surface 123 does not represent a plane between the side surfaces of the flow channel outer section 122, but rises to a side wall in the respective connection area. The rising outer area 126 is located laterally outside the area enclosed by the inner frame 220, so that the narrowing of the opening cross section of the flow channel associated with the rising outer area 126 is negligible. Dripping water is but is forced by the rising outer area 126 to flow towards the center of the collecting area 123. It can therefore not collect in the throat areas on the side walls.

The sealing strip 223 ensures that water that may possibly get between the inner frame part 221 of the outer wall grille 210 and the holding frame fastening tabs 232 is first guided into the middle of the flow channel and then from there has to take the already described path via the collecting surface 123 to the outside.

Since the sealing strip 223 fills the gap between the side inner frame parts 221 of the outer wall grille 210 and the holding frame fastening tabs 232, there is also a clamping effect during assembly. In this way, the outer wall grille 210 is secured against falling immediately after insertion, even before the fastening screws are tightened.

Reference symbol list

• 100 Wall duct unit
• 110 Wall duct element
• 111 back
• 112 connection pieces
• 113 Hose holder
• 114 Mounting hole
• 115 outer face
• 116 mounting holes
• 117 grooves
• 120 flow channel
• 121 Flow channel inner section
• 122 flow channel outer section
• 123 Collection area
• 124 drip edge
• 125 lower flow channel area
• 126 rising outdoor area
• 210 external wall grilles
• 211 upper slat
• 211.1 Nose
• 212 Additional slat
• 213 medium slats
• 214 lower slat
• 215 lateral overhangs
• 216 Frame
• 217 Expansion tape sealing strip
• 218 sealing strips
• 219 rear mirror surface
• 220 inner frame
• 221 side inner frame parts
• 222 long holes
• 223 side expansion tape sealing strip
• 224 Recess
• 225 front mirror surface
• 229 Drip tray
• 230 holding frames
• 231 holding frame external element
• 232 holding frame fastening straps
• 233 fixing screws
• 234 small animal protection grille fastening tabs
• 235 small animal protection gate
• 236 grid area
• 237 hooks
• W Wall connection level

Claims (14)

1. External wall grille (210) for a wall outlet unit (100) for connecting to a building services appliance, comprising at least:

   - an inner frame (220) with at least two parallel inner frame side parts (221), between which a plurality of louvres (211, 213, 214) are enclosed, which are oriented parallel to one another and slope obliquely downwards respectively towards a front side to be oriented towards the outside of the building,

   - a cover frame (216) enclosing the inner frame (220), the rear side of which forms a mirror surface (219) for bearing against a wall connection plane (W);

   wherein at least the lower louvre (214) extends outwards beyond an outer mirror surface (225) of the cover frame (210),

   characterised in that
   an additional louvre (212) is arranged above the top louvre (211) of the obliquely outwardly sloping louvres (211, 213, 214), said additional louvre being connected to an upper crossbar of the cover frame (216) and being oriented so as to slope downwards towards a rear side of the external wall grille (210), and a retaining frame (230) can be mounted on a wall connection plane (W), wherein the retaining frame (230) comprises at least two retaining frame mounting tabs (232) aligned perpendicularly thereto, wherein the frame side parts (221) of the external wall grille (210) at least partially overlap the retaining frame mounting tabs (232) and in each case at least one mounting means for connecting the external wall grille (210) and the retaining frame (230) is arranged in the overlapping region.
2. External wall grille (210) according to claim 1, characterised in that the lower louvre (214) has lateral projections (215) which extend laterally outwards beyond the inner frame (220) and which bear against or are connected to the outer mirror surface (225) of the cover frame (216).
3. External wall grille (210) according to claim 1 or 2, characterised in that the rear mirror surface (219) of the cover frame (216) is backed with mitre-cut sealing strips (218), wherein the mitre planes terminate on the inner frame side parts (221) or in the gap between them.
4. External wall grille (210) according to any one of claims 1 to 3, characterised in that at least one swelling tape sealing strip (217) is applied to the rear mirror surface (219) of the cover frame (216) or to the sealing strips (218) arranged there.
5. External wall grille (210) according to any one of the preceding claims, characterised in that a side sealing strip (223) is applied to each of the outer sides of the inner frame side parts (221), said sealing strip sloping downwards towards the rear side of the external wall grille (210).
6. External wall grille (210) according to any one of the preceding claims, characterised in that a weatherboard (229) is provided, which is connected to the underside of the cover frame (216), or on which the cover frame rests, and which extends outwards beyond the outer mirror surface (225) of the cover frame (216).
7. External wall grille (210) according to any one of the preceding claims, characterised in that the lower edge of the additional louvre (212) maintains a distance from the top louvre (211).
8. External wall grille (210) according to any one of the preceding claims, characterised by a small rodent guard grille (235), which is connected to the retaining frame (230) or to the external wall grille (210).
9. External wall grille (210) according to claim 8, characterised in that the small rodent guard grille (235) is provided with hooks (237) on its lateral edges, and said hooks can be hooked into recesses in the rodent guard grille mounting tabs (234).
10. Wall outlet unit (100) for connecting to a building services appliance, at least comprising an external wall grille (210) with retaining frame (230) according to any one of the preceding claims, as well as a wall outlet element (110) having a flow channel (120) comprising a flow channel inner section (121) and a flow channel outer section (122), wherein the retaining frame (230) can be mounted in the region of an outer end face (115) of the wall outlet element (110) to be arranged on the outside of the building and the retaining frame mounting tabs (232) extend into the flow channel outer section (122).
11. Wall outlet unit (100) according to claim 10, characterised in that at least one collecting surface (123) is formed in the lower region of the flow channel outer section (122) and terminates in a drip edge (124) above a flow channel bottom surface (125).
12. Wall outlet unit (100) according to claim 10 or 11, characterised in that the frame side parts (221) each have a recess (224) into which a step formed by the collecting surface (123) and the drip edge (124) protrudes.
13. Wall outlet unit (100) according to claim 11 or 12, characterised in that in each case an upwardly sloping outer region (126) is formed on the collecting surface (123) at the transition to the side walls of the flow channel outer section (122).
14. Wall outlet unit (100) according to any one of claims 11 to 13, characterised in that the overlapping regions of the frame side parts (221) of the external wall grille (210) and the retaining frame mounting tabs (232), the mounting means and the rodent guard grille (235) are arranged above the collecting surface (123).

Images