EP1703228A1 - Assembly for a compact heating installation - Google Patents

Abstract

The unit (1) has one or several injection molded housing (2,3,4) with at least a line connection (6,8) to a stationary fluid line (10). The securing means has at least a positive fit element pivoted to the unit. The transmission means are provided in or at the unit for moving the positive fit element. An independent claim is also included for the compact heating system.

Description

The invention relates to a structural unit for a compact heating system with the features specified in the preamble of claim 1. Such units are today known in the art and usually consist of two or more plastic injection molded components, which record all major hydraulic and sensory components of a compact heating system in addition to a circulating pump and the plate plate heat exchanger usually connected at the back. Where possible, the assembly is designed so that it can be largely factory prefabricated and on site by the heating engineer with the least possible effort reliably and quickly mounted.

In order to connect the stationary lines - these are typically two lines for the space heating heating circuit and a line for hot water supply and another line for the heated service water - with the unit, it is bekonnt, the stationary lines in an example attached to the wall chassis form the compact heating system in the form of plug-in connections, on which then the unit is plugged with their correspondingly shaped connections. In order to secure the assembly in this connected to the stationary lines position, it is part of the state of the art to integrate one or more threaded sleeves within the unit and to secure them after mounting the unit from below by screws, on the one hand abut the chassis and on the other are defined in the threaded sleeves of the unit.

Although this method of attachment has basically proven itself, since the stationary line connections are first attached to the Anschlussplotte of the chassis, after which the unit is placed and then finally secured by screws, but this type of positive locking requires accessibility from the bottom of the chassis ago. Here, however, the space is usually limited only by the existing lines there. In addition, relatively high forces can be applied by the aforementioned screw, which can lead to punctual overloading of the assembly.

Against this background, the invention has the object, a generic unit in such a way that it can be easily, quickly and reliably connected within the compact heating system, mounted and secured.

This object is achieved according to the invention by the features specified in claim 1. Advantageous embodiments of the invention are specified in the subclaims, the following description and the drawing.

The structural unit according to the invention consists of a one-part or multi-part injection molded housing and has pluggable line connections, via which the conductive connection to the corresponding stationary fluid lines takes place. In this case, the connector and the assembly within the compact heating system is secured by positive locking means, but not, as in the prior art by a separate fuse element in the form of a screw, but by a movable mounted on the unit form-locking element, with a kompaktheizungsanlagenseitigen component, usually the Chassisseitigen connection plate by engaging behind the form-fitting Fuse forms. The basic idea of the present invention is therefore not to use a separate securing element here, but to provide a positive locking element on the structural unit and to mount it in such a movable manner that it can be brought into an interlocking position after the plug connection has been formed. This can be done either by moving the Formschtussetementes or by turning the same, depending on the design of the positive connection.

Although in principle an immediate actuation of the form-fitting element in its mounting on the structural unit is conceivable, gear unit means for moving the positive-locking element are particularly advantageously provided on the structural unit. This can be done to facilitate the accessibility of the actuator, but also with a suitable translation to increase the actuating forces, In addition, the transmission means can be advantageously designed so that self-locking occurs, d. h. That the one or more positive locking elements remain in their locked position ver and can not be inadvertently solved by external force. Finally, with a suitable design of the positive locking elements, additional forces can be used up in the insertion direction in order to ensure the intended positioning of the structural unit within the compact heating system.

It is particularly advantageous if the one or more positive locking elements are mounted in a translationally movable manner, so that they secure the connection in a bolt-like manner after the fluid-conducting connections have been plugged together. In this case, the transiatory movement of the form-locking elements or the form-locking element, if only one is provided, advantageously transversely to the direction of insertion of the terminal, since particularly high forces are absorbed in this arrangement can, without the risk of loosening the Formschlussver connection is given.

In a preferred embodiment of the invention, the Fvrmschlusselement is arranged directly on a rack, which is guided displaceably in or on the assembly, with this rack, a drive wheel is engaged, which is rotatably mounted in or on the assembly. Then, the translational movement, with which the rack and the attached form-locking element is moved for the purpose of locking, take place via a rotational movement of the drive wheel, whereby only a small space for generating this translational movement is required, but at the same time with appropriate dimensioning comparatively high forces can also be applied by hand. However, the interlocking element does not necessarily have to be attached directly to the rack, it is also an indirect connection conceivable in which the rack drives a further component, which carries the Forrnschlusselement.

Conveniently, locking means are provided, which secures the Formschlusselernent in the locking position, so that accidentally does not unintentionally cancel the positive engagement due to external forces, without this being desirable. Such a rust position can be provided both in the drive means and in the region of the positive-locking element. It is expediently designed so that the rust process is both audible and palpable upon actuation, so that the installer of the unit quasi a mechanical and audible feedback received as soon as the lock is located in the intended position.

As already explained at the outset, several stationary line connections are available in compact heating systems. According to the number These stationary connections are usually also provided plug-in connections in the unit. It is particularly advantageous if the interlocking element, the bearing and the gear means are arranged in the region between two line connections to the unit, This ensures a particularly high stability of the unit, ie in particular the storage of the positive locking element can absorb high forces and on the other hand for the For example, paired locking of plug connections a special favorable arrangement is created, since the lever arms and thus possibly acting moments are approximately equal to both terminals. In this case, two positive locking elements with bearing and gear means are advantageously provided within the assembly in an arrangement with four line connections, advantageously in different housing sections.

It is particularly favorable when the form-locking element is designed to engage in a connection plate to which the stationary lines are fixed. Such a connection plate can form part of the chassis of the compact heating system, wherein for each positive locking element expediently a recess is provided in this connection plate, through which the plug-in unit on the plate, the respective form-fitting element is inserted, such that the positive locking element engages behind the connection plate after locking and thus the unit on the connection plate and thus the chassis of the compact heating system positively secures and at the same time the line connections, which are designed as plug-in connections.

It is particularly favorable if the positive-locking element has an oblique surface directed towards the connecting plate, which pulls the structural unit toward the plate when it is moved into the locking position. In this way, at the same time with the locking an additional force in the insertion direction be applied, which causes an intimate connection of the assembly with the terminal plate and the terminals located thereon of the stationary lines.

According to an advantageous embodiment of the invention, the drive wheel, which causes the translational movement of the rack, part of a shaft which is rotatably mounted within the assembly. In this case, the drive wheel and shaft are advantageously integrally formed as a plastic injection molded part and preferably latched in a bearing receptacle of the assembly and rotatably mounted so that after inserting the rack in the unit provided on the linear guide which carries the drive wheel shaft can be inserted into the bearing receptacle, after which Drive connection between the drive wheel and rack is made.

Since the drive is needed only for the purpose of mounting the unit, it is advantageous if the drive is not done via a separate linkage or handwheel, but by a tool already available to the fitter anyway. Then, the drive shaft is expediently provided on the front side with a tool holder, which is preferably arranged so that it is freely accessible even in the installed state of the unit. In that case, both the backup, ie. H. the locking of the connector and in the event of a later error or defect the Entsichem be solved in a simple manner by inserting and rotating the tool.

The positive-locking element is expediently arranged on the underside of the toothed rack, and at a distance therefrom via a web, which produces the connection between the structural unit and the positive-locking element.

In an advantageous embodiment of the assembly in which the injection-molded housing is constructed in three parts and the middle housing part a circulating pump and the two laterally adjoining housing parts each have a pluggable line connection pair, it is advantageous to each of the laterally adjoining housing parts associated with a movably mounted positive-locking element. These form-fitting elements can be moved separately from one another or, if appropriate, also coupled for movement.

Fig. 1

in vereinfachter perspektivischer Darstellung eine Baueinheit gemäß der Erfindung vor der Montage auf eine ortsfeste Anschlussplatte,

Fig. 2

die Anordnung gemäß Fig. 1 aus anderer Perspektive,

Fig. 3.

die Baueinheit nach erfolgter Montage auf die Anschlussplatte und Verriegelung in perspektivischer Darstellung ähnlich Fig. 1,

Fig. 4

eine perspektivische Unteransicht auf die Anschlussplatte in montierter und verriegelter Stellung der Baueinheit und

Fig. 5

einen Teil der Baueinheit gemäß Fig. 1 in Explosionsdarstellung mit dem zugehörigen Teil der Aufnahmeplatte.

The invention is explained in more detail with reference to an embodiment shown in the drawing. Show it:

Fig. 1

in a simplified perspective view of a structural unit according to the invention prior to mounting on a stationary connection plate,

Fig. 2

the arrangement of FIG. 1 from a different perspective,

Fig. 3.

the assembly after mounting on the connection plate and locking in a perspective view similar to FIG. 1,

Fig. 4

a bottom perspective view of the connection plate in the assembled and locked position of the unit and

Fig. 5

a part of the assembly of FIG. 1 in an exploded view with the associated part of the receiving plate.

In the figures 1 to 4, a part of a compact heating system is shown, namely a structural unit 1, which is formed of three interconnected Sprifizgussgehäuseteilen 2, 3 and 4. The exemplary embodiment stands for a multiplicity of structural units, as used in such compact heating systems Use and is only to be understood as an example, it could be one piece but also more than three parts.

The assembly 1 shown in the installed state seen from the front of a left housing part 2, a right housing part 3 and a mid-mounted between the two housing parts 2 and 3 middle housing part 4, which is provided for receiving a circulating pump, not shown. The housing parts 2 and 3 are connected at the rear to a plate heat exchanger 5, which also connects them mechanically to one another by incorporation of the middle housing part 4.

The assembly 1 is designed and provided in a conventional manner for receiving almost all hydraulic and sensory components of the compact heating system. It is in this context only as an example to the European Patent Application 03 025 083.1 referenced where the structure and function of such a compact heating system is described in detail. The assembly 1 has four downwardly leading line connections 6, 7, 8 and 9, which are provided for connection of the unit 1 with stationary pipelines. The stationary lines, which are not shown in the drawings, are fixed by means of connecting pieces 10, in a receiving plate 11.

The receiving plate 11 forms part of the example attached to the wall chassis of the compact heating system, which is not shown here in detail. The connecting pieces 10 have on their underside a thread, via which they are connected in a conventional manner with the free ends of the stationary pipes. These sockets have previously been inserted from above, ie from the unit side side of the connection plate 11 through oval recesses 14, so that they occupy the position shown in Figures 1 and 2, in which they rest with a flaky part on the top of the receiving plate 11, pass through the respective recess 14 with a positive-locking part and lying behind a groove, with which the connecting pieces 10 by means of a bracket, not shown, can be secured positively within the receiving plate 11 ,

The connecting pieces 10 have on the receiving plate 11 upwardly projecting part a groove 13 which is provided for receiving an O-ring, which seals the respective Anschlußstufizen 10 with this after plugging in the direction 12 cross-pipe connection 6 to 9. The connecting pieces 10 are thus arranged in alignment with the line terminals 6 to 9 in corresponding provided in the receiving plate 11 slot-shaped recesses 14 and fixed.

To connect the unit 1 with the stationary connection piece 10, the assembly 1, which is then advantageously fully populated, lowered in the direction 12 with the line terminals 6 to 9. until the connecting pieces 10 sealingly engage in the line connections 6 to 9. In this case, plate-shaped form-locking elements 15 pass through approximately T-shaped recesses 16 in the connection plate 11. These positive locking elements 15 are connected via a web to the back of a rack 16 and formed integrally therewith, such that a positive locking element 15 laterally projects beyond the web to two directions , as is visible with reference to Figures 4 and 5.

When placing the assembly 1 in the direction 12, the two positive locking elements 15 first pass through the larger rectangular portion of a recess 16. To secure the unit 1 relative to the stationary receiving plate 11 and the line connections 6 to 9 in the connecting piece 10 form fit, then the form-fitting elements 15 translated translationally in the direction 18. As a result, the two form-fitting elements 15 projecting laterally beyond the web reach into the region next to a recess 16, in which they are still covered by parts 19 of the receiving plate at the top. whereby a positive connection opposite the mounting direction 12 is achieved. Since the interlocking elements 15 have inclined surfaces 20 in the front region, the structural unit 1 is pulled in the direction of the connecting plate 11 when the interlocking elements 15 move in the direction of the connecting elements 11, since the interlocking elements 15 are attached to the rear side of the respective toothed rack 7, which in turn is only in the structural unit 1 is mounted displaceably in the direction 18 and the opposite direction.

In each case between two line connections 6, 7 and 8, 9, a bearing receptacle 21 is provided, in which not only the rack 17 is displaceably guided, but in the beyond a shaft 22 is rotatably mounted, which carries a drive wheel 23, which in built Condition meshes with the rack 17 and this form-fitting secured within the bearing seat 21. The bearing holder 21 thus forms a linear guide for the rack 17 and a bearing for the shaft 22. Since the bearing receptacle 21 is arranged between each two line connections 6, 7, 8, 9, this can absorb high forces, since the unit 1 in the area the line connections has a particularly high stability. As FIG. 5 shows in particular, ribs 24 are additionally provided on the right-hand injection-molded housing part 3, which additionally reinforce or support the bearing mount 21.

At the front end in Fig. 5, the shaft 22 is formed with a tool holder 25 in the form of a hexagon socket. It also has on its outer circumference a radial projection 26 which on the one hand forms a stop for the shaft 22 inserted in the bearing receptacle 21 in terms of its rotational movement and on the other part can form a latching connection with appropriate training the axial guide track on the outside of the bearing seat 21 (FIG. 5). Here, in one or both end positions of the shaft 22 may be provided a grate connection, in which the projection 26 is guided in a corresponding recess.

The shaft 22 with the drive wheel 23, the projection 26 and the molded tool holder 25 is integrally formed as a plastic injection molded part. The pointing in Fig. 5 in the plane of the drawing end is conical and longitudinally divided, so that this component in the corresponding circular recess 27 of the bearing holder 21 is inserted in such a way that it there after reaching its intended position by cushioning the end-side divided area locked.

In the illustrated embodiments, which differ in this respect between Figures 1 to 4 and 5, a further latching connection between the free end of the rack 17 and the recess 16 is provided in the embodiment of FIG. 5 is extended to the opposite direction 18 for this purpose Part of the rack 17 on the underside a locking lug 28 is provided, which then, when the interlocking elements 15 are arranged completely below the parts 19 of the receiving plate 11, audibly and tangibly engages in the recess 16, so that the fitter knows that the locked position is reached. This locking lug 28 also secures the lock against unintentional release.

In the embodiment according to FIGS. 1 to 4, the detent nose 28 'is modified. Here, the end of the rack 17 is wave-shaped, whereby on the one hand a greater travel of the locking lug 28 'is achieved and on the other hand at the end of a handle 29 is formed, which serves to release the latching connection, when the lock should be canceled, for example the unit 1 of the receiving plate 11 for the purpose of repair or maintenance to separate. This handle 29 allows the detent 28 'manually or by means of a tool so far from the recess 16 lift up that the shaft 22 can be rotated so that the rack 17 moves in the opposite direction to the direction 18, then, if the respective form-fit element 15 with the larger part of the recess 16 is aligned with the entire assembly 1 against the direction 12 to pull upwards.

Furthermore, a circular recess 30 is provided within the receiving plate 12, in which engages a projecting at the middle injection molded part 4 downwardly conical nose 31 after lowering the assembly 1 in the direction 12. As a result, the middle housing part 4 is supported and also facilitates the placement of the assembly 1 on the receiving plate 11, as done by the conical nose 31, a guide and centering of the assembly 1 to the plate 11.

Bezugszelchenllste

1 -

unit

2 -

left injection molded housing part

3 -

right injection molded housing part

4 -

middle injection molded part

5 -

Plate heat exchanger

6 to 9

cable connections

10 -

spigot

11 -

mounting plate

12 -

mounting direction

13 -

Groove in 10

14 -

Recesses for 10

15 -

Form-fitting elements

16 -

Recesses for 15

17 -

racks

18 -

Direction to lock

19 -

Form-fitting parts of the receiving plate 11th

20 -

Sloping surfaces of 15

21 -

bearing seat

22 -

wave

23 -

drive wheel

24 -

ribs

25 -

tool holder

26 -

Ahead at 22

27 -

Recess in 21

28 -

Latch in Fig. 5

28 '-

Locking lug in Figures 1 to 4

29 -

Handle

30 -

recess

31 -

nose

Claims (14)

Assembly for a compact heating system with a one- or multi-part injection molded housing (2, 3, 4) with at least one plug-in line connection (6, 7, 8, 9) to a stationary fluid line (10), and with means for positive securing the connector and / or the structural unit (1) within the compact heating system, characterized in that the securing means comprise at least one positively locking element (15) movably mounted on the structural unit (1). Assembly according to claim 1, characterized in that in or on the structural unit (1) transmission means (17. 23) for moving the positive-locking element (15) are provided. Assembly according to one of the preceding claims, characterized in that the positive-locking element (15) is mounted in a translatory manner, preferably transversely to the plug-in direction (12) of the connection (6, 7, 8, 9), Assembly according to one of the preceding claims, characterized in that the form-fitting element (15) is arranged directly or indirectly on a toothed rack (17), which is displaceably guided in or on the structural unit (1), and in that one with the toothed rack (17). engaged drive wheel (23) is rotatably mounted in or on the assembly (1). Assembly according to one of the preceding claims, characterized in that latching means (26, 28) are provided which secure the positive-locking element (15) in the locking position. Assembly according to one of the preceding claims, characterized in that two or more pluggable line connections (6, 7, 8. 9) are provided, wherein the positive locking element (15), the bearing (21) and the transmission means (17, 23) in the area between two line terminals (6, 7, 8, 9) are arranged. Assembly unit according to one of the preceding claims, characterized in that the positive-locking element (15) is designed to engage in a connection plate (11) to which the fixed lines (10) are fixed and which preferably forms part of the chassis of the compact heating system. Assembly according to one of the preceding claims, characterized in that the connecting plate (11) has a recess (16) which is penetrated by the positive-locking element (15) and is engaged behind in the locking position of this. Assembly according to one of the preceding claims, characterized in that the positive-locking element (15) has an attachment plate (11) directed oblique surface (20), which pulls the assembly (1) to the plate (11) when moving in the locking position. Assembly according to one of the preceding claims, characterized in that the drive wheel (23) is part of a shaft (22) which is rotatably mounted, wherein drive wheel (23) and shaft (22) as Plastic injection molded part formed in one piece and preferably in a bearing receptacle (21) of the assembly (1) latching inserted and rotatably mounted. Assembly according to one of the preceding claims, characterized in that the drive shaft (22) on the front side a tool holder (25) aufweisfi, which is preferably freely accessible even in the installed state of the assembly (1). Assembly according to one of the preceding claims, characterized in that the positive-locking element (15) on the underside of the rack (17) is formed at a distance thereto via a web. Assembly according to one of the preceding claims, characterized in that the Spritzgussgehüuse (2, 3, 4) is constructed of at least three parts, wherein the central housing part (4) a circulating pump and the two laterally adjoining housing parts (2, 3) each have a plug-in Leitungsonschlusspaar (6, 7, 8, 9) and have movably mounted positive-locking elements (15). Compact heating system with a structural unit according to one of the preceding claims.

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