EP4047283A1 - Heating system with bayonet connection between heater and exhaust gas feed pipe system - Google Patents

Abstract

The invention relates to a heating system for a building, the heating system comprising a heater (1) and an exhaust gas supply air pipe system (2), the exhaust gas supply air pipe system (2) being connected to the heating device (1 ) can be connected, wherein the connecting element (3) can be mechanically connected to the heater (1) by means of a bayonet connection (4, 5) and the bayonet connection (4, 5) comprises a locking element arrangement (14, 15), by means of which closing the bayonet connection (4, 5) by a predeterminable angle of rotation opening of the bayonet connection (4, 5) can be blocked.

Description

The invention relates to a heating system for a building, a heater for the heating system and a connection element for the heating system.

It is known to use exhaust gas adapters to connect exhaust pipe systems or combined exhaust gas supply air pipe systems to heating devices such as boilers or boilers. The GAR (Gas Appliance Regulation), which came into force on April 21, 2018, places stricter requirements on safety-related objects and fittings than the existing GAD (Gas Appliance Directive). In order to ensure that all fittings (safety-relevant built-in parts, etc.) are tight, it was suggested in this context that the flue gas adapter is either mounted directly on the boiler or it is ensured that only flue gas adapters approved for the heater in question can be used (Poka Yoke). For the latter case, for example, additional, mutually corresponding connecting means, such as certain hole patterns on the heater (cf. 1 ) and to attach corresponding pin patterns to the exhaust adapter to ensure that only certain exhaust adapters (namely those with a matching pin pattern) can be connected to the heater.

Corresponding additional connection means, however, increase the manufacturing complexity and can often be a hindrance when trying to provide adapters that are as compact as possible. Furthermore, corresponding additional fasteners can complicate the installation of the heating system.

It is therefore the object of the invention to at least partially solve the problems described with reference to the prior art and in particular to provide an improved heating system in which it can be ensured that the exhaust gas supply air pipe system is connected to the heater as securely as possible. In particular, only certain connection elements (exhaust adapters) should be able to be used. Nevertheless, these connection elements should be as easy and/or compact as possible to produce and as easy as possible to install or assemble.

This object is achieved according to the features of claim 1. Advantageous configurations result from the features of the dependent claims.

A heating system for a building contributes to this, the heating system comprising a heater and an exhaust gas supply air pipe system, the exhaust gas supply air pipe system being connectable or connected to the heater (flow-wise) by means of a (common) connection element, the Connection element is mechanically connected or connected by means of a bayonet connection with the heater and the bayonet connection comprises a locking element arrangement, by means of which after closing the bayonet connection by a predeterminable angle of rotation opening the bayonet connection (releasably) can be blocked.

The heating system is generally used to heat a building, such as a residential building, and/or in particular to heat a water supply, such as a water circuit in the residential building. The heater is usually a gas heater. In other words, this relates in particular to a heater which is set up to burn one or more gases, possibly with the supply of ambient air from a building, in order to generate energy for heating water, for example, for use in an apartment. For example, the heater can be a so-called gas condensing boiler. The heater usually exhibits at least one burner (with a combustion chamber) and a conveying device such as a fan, which conveys a mixture of fuel (gas) and combustion air (through a mixture duct of the heater) to the burner.

The exhaust-air supply pipe system usually includes an exhaust pipe and an air supply pipe. In this case, the exhaust gas pipe can be guided at least in sections (coaxially) in the air intake pipe. The exhaust pipe is used to remove exhaust gases from the heater. The supply air pipe serves to supply ambient air to the heater in order to function as combustion air in the heater.

The connection element can be formed, for example, in the form of an adapter. In this context, the connection element can represent, for example, an exhaust gas adapter or exhaust gas supply air adapter.

The bayonet connection can be configured or designed in such a way that only specific connection elements, for example only connection elements approved for the heater, can be connected to the heater. For example, a heater-typical or heater-type-specific bayonet connection element can be formed on the heater. In this context, a (only) corresponding bayonet connection element can be formed on the connection element. In this connection or for the purpose mentioned, the bayonet connection can be distinguished, for example, by a locking element arrangement, by means of which, after the bayonet connection has been closed by a predeterminable angle of rotation, opening of the bayonet connection can be blocked. On a heater-side bayonet connection element of the bayonet connection, for example, a heater-side latching element of the latching element arrangement can be provided. On a bayonet connection element of the bayonet connection on the connection element side, for example, a latching element on the connection element side of the latching element arrangement can be provided.

The latching element on the heating device side and the latching element on the connecting element side are generally formed to correspond to one another. For example, the locking element on the heater side and/or the shape or contour of the bayonet connection element on the heater side can be formed or shaped in the area of the locking element on the heater side in such a way that only those connection elements can be (safely) connected to the heater that have a bayonet connection element on the connection element side with the bayonet connection element on the connection element side Have locking element of the locking elements arrangement.

Furthermore, the predeterminable angle of rotation can also contribute to the characterization of the bayonet connection. For example, the angle of twist can be predetermined to a value in the range from 5° to 15°. Preferably, the angle of twist can be predetermined at approximately 10°.

According to an advantageous embodiment, it is proposed that the locking element arrangement comprises a ramp element and a locking lug element. For example, the ramp element can form the locking element on the heater side and the locking nose element can form the locking element on the connection element side. In particular, the ramp element is arranged and aligned in such a way that its ramp has a slope in the circumferential direction.

According to a further advantageous embodiment, it is proposed that at least one latching element of the latching element arrangement (in the radial direction) can be deflected or disengaged relative to another latching element of the latching element arrangement. For example, the detent element (in the radial direction) can be deflected or disengaged relative to the ramp element. For deflection or disengagement, a (separate) tool may be required, for example, which can reach the locking element arrangement, for example, through a dismantling opening of the connection element.

According to a further advantageous embodiment, it is proposed that at least one section of the exhaust gas supply air pipe system can be mechanically connected or is connected to the connection element by means of at least one fixing element. The section of the exhaust gas supply air pipe system can relate to a lower end of the supply air pipe, for example.

According to a further advantageous embodiment, it is proposed that the at least one fixing element comprises a fixing element that acts in a form-fitting manner. The positively acting fixing element can, for example, be set up and/or arranged in such a way or (in the assembled state) arranged in such a way that it secures the exhaust gas supply air pipe system axially with respect to the connecting element. In other words, this can also be described in particular in such a way that the positively acting fixing element can prevent the exhaust gas supply air pipe system from axially loosening or slipping out of the connection element (along the central axis of the connection element). For example, the positively acting fixing element can be formed in the manner of a clip or be a clip. For example, the positively acting fixing element can be a pin-shaped clip. Exactly one fixing element that acts in a form-fitting manner is preferably provided.

According to a further advantageous embodiment, it is proposed that the at least one fixing element comprises a fixing element that acts in a non-positive manner. The non-positively acting fixing element can, for example, be set up and/or arranged in such a way or (in the assembled state) arranged in such a way that it prevents unwanted twisting or an unwanted rotary movement of the exhaust gas supply air pipe system (about the central axis of the connecting element) relative to the connecting element or can prevent in the connection element. For example, the non-positively acting fixing element can be a screw. Two non-positively acting fixing elements are preferably provided.

According to a further advantageous embodiment, it is proposed that the connecting element be formed at least in sections in the shape of a ring around a central axis and a longitudinal axis of the at least one fixing element in the connected state encloses an angle in the range of 45° to 90° with the central axis. This can advantageously contribute to the connection element being able to be as compact as possible, in particular comparatively flat. The angle is preferably in the range from 60° to 90°, particularly preferably in the range from 75° to 98°. If several fixing elements are provided, it is also preferred if the longitudinal axes of all fixing elements enclose an angle in the range of 45° to 90° (or an angle according to one of the more preferred ranges mentioned) with the central axis.

According to a further advantageous embodiment, it is proposed that at least one measuring opening for inserting a measuring probe into the exhaust gas supply air pipe system is formed on the outside of the connection element. Two measurement openings, in particular an exhaust gas measurement opening and an inlet air measurement opening, are preferably formed externally to the connection element. For this purpose, the at least one measuring opening can, for example, be integrated into the exhaust gas supply air pipe system or formed thereon. This can contribute to the fact that no measurement opening has to be realized in or on the connection element, so that the connection element can advantageously be designed as compactly as possible.

According to a further advantageous embodiment, it is proposed that the connection element be formed in the shape of a plate. In this case, the connection element can have an extension along the central axis of at most 10 cm [centimeters]. This can also contribute to the connection element being able to be designed as compactly as possible.

According to a further advantageous embodiment, it is proposed that the connection element be made of plastic. The connecting element is preferably formed in one piece. Furthermore, the (single-piece) connection element can be formed (entirely) from plastic.

According to a further aspect, a heater for a heating system described here is proposed.

According to a further aspect, a connection element for a heating system described here is proposed.

The details, features and advantageous configurations discussed in connection with the heating system can accordingly also occur in the heating device and/or the connection element presented here and vice versa. In this respect, full reference is made to the statements there for a more detailed characterization of the features.

The invention will now be explained in detail with reference to the figures.

• Figur 1: ein Heizgerät mit einem Verbindungsmittel gemäß dem Stand der Technik,
• Figur 2: ein beispielhaftes Heizgerät für eine hier beschriebene Heizungsanlage in perspektivischer Ansicht,
• Figur 3: ein beispielhaftes Abgas-Zuluft-Rohrsystem für eine hier beschriebene Heizungsanlage in Schnittdarstellung,
• Figur 4: das Abgas-Zuluft-Rohrsystem aus Figur 3 in einer weiteren Schnittdarstellung,
• Figur 5: das Abgas-Zuluft-Rohrsystem aus Figur 3 in Explosionsdarstellung,
• Figur 6: das Abgas-Zuluft-Rohrsystem aus Figur 3 in perspektivischer Ansicht
• Figur 7: eine beispielhafte Bajonettverbindung einer hier beschriebenen Heizungsanlage, in einem geöffneten Zustand,
• Figur 8: die Bajonettverbindung aus Figur 7 in einem geschlossenen Zustand, und
• Figur 9: eine beispielhafte Vorgehensweise zur Demontage der Bajonettverbindung aus den Figuren 7 und 8.

They represent:

• figure 1 : a heater with a lanyard according to the state of the art,
• figure 2 : an exemplary heater for a heating system described here in a perspective view,
• figure 3 : an exemplary exhaust air supply pipe system for a heating system described here in a sectional view,
• figure 4 : the flue gas supply air pipe system figure 3 in another sectional view,
• figure 5 : the flue gas supply air pipe system figure 3 in exploded view,
• figure 6 : the flue gas supply air pipe system figure 3 in perspective view
• figure 7 : an exemplary bayonet connection of a heating system described here, in an open state,
• figure 8 : the bayonet connection off figure 7 in a closed state, and
• figure 9 : an exemplary procedure for dismantling the bayonet connection from the Figures 7 and 8 .

1 shows a heater 1 with a connecting means 13 according to the prior art. The connecting means 13 comprises a heater-type-specific hole pattern on the heater 1 (cf. 1 ) to ensure that only certain connection elements (exhaust adapter) can be connected to heater 1.

the Figures 2 to 6 show components for a heating system described here in different views. In this context shows 2 an exemplary heater 1 for the heating system. In 2 is also a detailed view of an exemplary heater-side bayonet connection element 4 of a bayonet connection 4, 5 (cf. 3 ) for the mechanical connection of a connecting element 3 (cf. 3 ) shown with heater 1.

the Figures 3 to 6 show an exemplary exhaust air supply pipe system 2 for the heating system in different views. The exhaust air supply pipe system 2 is also in the means of a Figures 3 to 6 Connection element 3 with heater 1 shown in various views and as examples (cf. 2 ) connectable. The connecting element 3 can be mechanically connected to the heating device 1 by means of a bayonet connection 4 , 5 . In the Figures 3 and 4 in this context, exemplary bayonet connection element 5 of the bayonet connection 4, 5 on the connection element side is shown.

According to the representations according to Figures 3 and 4 is illustrated by way of example that at least one section 6 of the exhaust gas supply air pipe system 2 can be mechanically connected to the connecting element 3 by means of at least one fixing element 7, 8. For example, three fixing elements 7, 8 are provided here (cf. figure 5 ), wherein, for example, a positively acting fixing element 7 and further, for example, two non-positively acting fixing elements 8 are used.

The connecting element 3 is here, for example, at least partially ring-shaped around a central axis 9 (cf. 4 ) is formed and a longitudinal axis 10 of the at least one fixing element 7, 8 encloses an angle 11 in the range from 45° to 90° with the central axis 9 in the connected state. Furthermore, for example, at least one measuring opening 12 for inserting a measuring probe into the exhaust gas supply air pipe system 2 is formed on the outside of the connection element.

The connecting element 3 is formed in the shape of a plate, for example. Furthermore, by way of example, the connecting element 3 is made of plastic.

To connect heater 1 (cf. 2 ) with the flue gas supply air pipe system 2 (cf. Figures 3 to 6 ), for example, the connection element 3 can be provided first. After that, the connection element 3 can be connected to the heater 1 by means of a bayonet connection 4, 5. Furthermore, at least one section 6 of the exhaust gas supply air pipe system 2 can be connected to the connecting element 3 by means of at least one fixing element 7 , 8 .

figure 7 shows an exemplary bayonet connection 4, 5 of a heating system described here, in an open state. In the detail view figure 7 can be seen in particular that the bayonet connection 4, 5 includes a locking element arrangement 14, 15. For example, the locking element arrangement 14, 15 here includes a ramp element 14 and a locking nose element 15. For example, here at least one locking element 15 of the locking element arrangement 14, 15 can be deflected in the radial direction relative to another locking element 14 of the locking element arrangement 14, 15 (see. Figure 9b ).

figure 8 shows the bayonet connection figure 7 in a closed state. From this it can be seen, for example, that by means of the locking element arrangement 14, 15 according to a closing of the bayonet connection 4, 5 by a predeterminable angle of rotation (here for example 10°) opening of the bayonet connection 4, 5 can be blocked.

figure 9 shows an exemplary procedure for dismantling the bayonet connection from the Figures 7 and 8 . The connecting element 3 can have a dismantling opening 16 through which a tool 17, such as a screwdriver, can be inserted up to the locking element arrangement 14, 15 (cf. Figure 9a ). The tool 17 can be used to exert a force on a locking element 15 of the locking element arrangement 14, 15, so that this locking element 15 is deflected in the radial direction relative to another locking element 14 of the locking element arrangement 14, 15 ( Figure 9b ). The deflection takes place in particular in such a way that there is no longer a form fit in the circumferential direction between the locking elements 14, 15, so that they can be guided past one another again in the circumferential direction (cf. 9c ).

In the heating system shown, the exhaust gas supply air pipe system can be connected to the heater as securely as possible.

Reference List

1

heater

2

Exhaust air supply pipe system

3

connection element

4

bayonet connector

5

bayonet connector

6

section

7

fixing element

8th

fixing element

9

central axis

10

longitudinal axis

11

angle

12

measurement port

13

lanyard

14

ramp element

15

detent element

16

dismantling opening

17

Tool

Claims (15)

Heating system for a building, wherein the heating system comprises a heater (1) and an exhaust gas supply air pipe system (2), wherein the exhaust gas supply air pipe system (2) can be connected to the heating device (1) by means of a connection element (3), wherein the connecting element (3) can be mechanically connected to the heater (1) by means of a bayonet connection (4, 5) and wherein the bayonet connection (4, 5) comprises a locking element arrangement (14, 15), by means of which, after closing the bayonet connection (4, 5) opening of the bayonet connection (4, 5) can be blocked by a predeterminable angle of rotation. Heating system according to Claim 1, in which the opening of the bayonet connection (4, 5) can be releasably blocked by means of the locking element arrangement (14, 15). Heating system according to claim 1 or 2, wherein the locking element arrangement (14, 15) comprises a ramp element (14) and a locking nose element (15). Heating system according to Claim 3, in which the ramp element (14) forms the locking element (14) on the heating device side and the locking lug element (15) forms the locking element (15) on the connecting element side. Heating system according to Claim 3 or 4, in which the ramp element (14) is arranged and aligned in such a way that its ramp has a slope in the circumferential direction. Heating system according to one of the preceding claims, wherein at least one latching element (15) of the latching element arrangement (14, 15) can be deflected relative to another latching element (14) of the latching element arrangement (14, 15). Heating system according to claim 6, wherein the at least one latching element (15) of the latching element arrangement (14, 15) can be deflected in the radial direction relative to the other latching element (14) of the latching element arrangement (14, 15). Heating system according to one of the preceding claims, wherein at least one section (6) of the exhaust gas supply air pipe system (2) can be mechanically connected to the connecting element (3) by means of at least one fixing element (7, 8). Heating system according to Claim 8, in which the at least one fixing element (7, 8) comprises at least one fixing element (7) which acts in a form-fitting manner. Heating system according to Claim 8 or 9, in which the at least one fixing element (7, 8) comprises at least one fixing element (8) which acts in a non-positive manner. Heating system according to one of the preceding claims, wherein the connection element (3) is formed at least in sections in the shape of a ring around a central axis (9) and a longitudinal axis (10) of the at least one fixing element (7, 8) forms an angle with the central axis (9) in the connected state (11) in the range of 45° to 90°. Heating system according to one of the preceding claims, wherein at least one measuring opening (12) for inserting a measuring probe into the exhaust gas supply air pipe system (2) is formed on the outside of the connection element. Heating system according to one of the preceding claims, wherein the connection element (3) is formed in the shape of a plate. Heating device (1) for a heating system according to one of the preceding claims. Connection element (3) for a heating system according to one of Claims 1 to 13.

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