Fastening arrangement with a gas shut-off valve and heating device

Abstract

Fastening arrangement (12) comprising a gas shut-off valve (3) and a fixing and throttling piece (13), which on the one hand is designed for fixing to the gas shut-off valve (3) by means of a number of detachable connecting elements (4) and on the other hand has a gas throttle (7) for throttling a flow of fuel gas from the gas shut-off valve (3), wherein the gas shut-off valve (3) is further formed with connecting element receptacles (5) corresponding to the number of detachable connecting elements (4), characterized in that the fixing and throttling piece (13) is formed with passage openings (15) for the connecting elements (4), wherein more passage openings (15) than connecting element receptacles (5) are provided or at least a part of the passage openings (15) cannot be brought into overlap with the connecting element receptacles (5).In particular, a second mounting position can be adopted which is shifted by a rotation angle of less than 180 degrees from a first mounting position.

Description

[0001] The invention relates to a mounting arrangement with a gas shut-off valve and a gas throttle, which can be attached to a combustion chamber door of a heating appliance. The combustion chamber door of a burner of the heating appliance can have a fuel gas-air channel, which is provided on the combustion chamber door and through which the combustible mixture of fuel gas and air can be introduced into the combustion chamber. The burner is provided in the combustion chamber, enabling a flame to be generated there. This flame heats a heat exchanger adjacent to the combustion chamber, through which water, in particular, is passed, absorbing the heat.

[0002] Gas shut-off valves, also known as gas fittings, are used in heating appliances to regulate the supply of fuel gas to the burner, ensuring that a stable flame is ignited and maintained in the burner using a predetermined fuel gas-air mixture. To achieve the most protected placement of the gas shut-off valve and / or a compact design for the heating appliance, the gas shut-off valve should ideally be housed within the appliance casing in a space-saving manner. However, the internal design of heating appliances varies considerably, which may impose different restrictions on the placement of the gas shut-off valve.

[0003] In addition, a large number of different gas shut-off valves are available that would (functionally) be suitable for use with a heating appliance, but which differ (significantly) from each other in terms of their external contour and / or their mounting options in the housing and / or are limited.

[0004] Gas valves with mounting assemblies are known in the prior art. JP2015090113A discloses a mounting assembly with a gas valve, but not a throttle element as a gas throttle for throttling the flow of fuel gas from the gas shut-off valve. Further mounting assemblies with gas valves are disclosed in publications CN211145498U, DE4345103C2, EP3339712B1, CH626968A5 and EP2341289A1.

[0005] Therefore, there is a desire to become more flexible in the design of the internal structure of the heating unit's housing and, if necessary, to further increase its compactness.

[0006] (Regulated) gas shut-off valves can be installed in the fuel gas supply. These valves enable safe and controlled operation of the heating appliance with a predefined flame quality. However, the fuel gas supply does not always flow directly from the gas shut-off valve to the burner. Instead, a gas throttle may be installed between the gas shut-off valve and the fuel gas-air duct. The gas throttle serves to restrict the gas flow. The fuel gas flow can be pre-adjusted or limited using the gas throttle.

[0007] Gas restrictors are typically manufactured as a separate component. They can be attached to the gas shut-off valve. This design carries the risk of improper assembly. If the gas restrictor is incorrectly mounted to the gas shut-off valve, it may not function correctly when attached to the heating appliance. If the faulty attachment to the combustion chamber door goes unnoticed and a customer uses a heating appliance with such a faulty design, malfunctions or even undesirable combustion processes can occur.

[0008] Based on this, the object of the invention is to at least partially solve the problems described with reference to the prior art. In particular, it aims to create a method by which different gas shut-off valves can be combined with different heating appliances in different orientations, so that a compact design and / or simple installation or manual adjustment of the gas shut-off valve is always possible, while at the same time creating a way to avoid incorrect installation of the gas throttle.

[0009] This problem is solved by the features of the independent claim. Further advantageous embodiments of the invention are specified in the dependent claims. It should be noted that the features listed individually in the claims can be combined with one another in any technologically meaningful way and define further embodiments of the invention. In addition, the features specified in the claims are further specified and explained in the description, which also presents further preferred embodiments of the invention.

[0010] To solve this problem, a fastening arrangement is provided, comprising a gas shut-off valve and a fixing and throttling piece. The fixing and throttling piece is designed, on the one hand, for fixing to the gas shut-off valve by means of a number of detachable connecting elements, and on the other hand, it has a gas throttle for throttling the flow of fuel gas from the gas shut-off valve. Furthermore, the gas shut-off valve is designed with connecting element receptacles corresponding to the number of detachable connecting elements. The fixing and throttling piece is designed with through-holes for the connecting elements, wherein more through-holes are provided than connecting element receptacles, or at least some of the through-holes cannot be brought into contact with the connecting element receptacles.

[0011] The mounting arrangement comprises a gas shut-off valve that can be permanently attached to the heating appliance, particularly inside the housing and outside the combustion chamber of the heating appliance, via the fixing and throttle piece and a predetermined number of detachable (identical or similar) connecting elements. The number of connecting element receptacles on the gas shut-off valve and the number of connecting elements correspond. Furthermore, a fixing and throttle piece is provided, which can be designed as an adapter or intermediate piece, so that the gas shut-off valve can be attached to the fixing and throttle piece and thus the gas shut-off valve can be mounted to the heating appliance by means of the fixing and throttle piece. The fixing and throttle piece is attached to the gas shut-off valve with detachable connecting elements, in particular screws, threaded bolts, etc.The connecting elements can be connected to connecting element receptacles, which are formed in particular in the outer contour of the gas shut-off valve or its valve housing, especially in the form of (suitable) threaded bores.

[0012] The fixing and throttling piece can have or form a base plate or bottom with openings for the connecting elements. The base plate or the distribution of the openings is designed so that the openings can be positioned in front of the connecting element receptacles of the gas shut-off valve. The base plate or bottom facing the gas shut-off valve can be essentially flat. The openings penetrate the base plate or bottom and have a (preferably round) contour that allows the connecting elements to be inserted and connected to the connecting element receptacles of the gas shut-off valve. The fixing and throttling piece is secured by inserting the connecting elements through the openings into the connecting element receptacles.The fixing elements clamp the fixing and throttling piece onto the gas shut-off valve.

[0013] The fixing and throttling piece has more through-holes than the gas shut-off valve's connecting element receptacles. Additionally or alternatively, the through-holes are arranged such that some of them cannot be aligned with the connecting element receptacles of the gas shut-off valve. In other words, this means, in particular, that after the fixing and throttling piece is fastened via the predetermined connecting elements, with the connecting elements in operative communication with all connecting element receptacles of the gas shut-off valve, at least one (or possibly several, in particular two, three, or four) of the through-holes remains unused, especially because, in this fixed position, it is not aligned with a connecting element receptacle of the gas shut-off valve.An overlap is regularly present when the connecting element provided here can be brought into effective engagement with the connecting element receptacle of the gas shut-off valve through the passage opening.

[0014] This allows the fixing and throttling piece to be attached in different orientations relative to the gas shut-off valve. There is no need for a preferred position in which the fixing and throttling piece should be fixed to the gas shut-off valve; rather, the mounting arrangement can be configured and / or adapted to suit different applications.

[0015] The fixing and throttling piece not only serves to allow the gas shut-off valve to be detachably attached, but also functions to control the flow of the fuel gas exiting the gas shut-off valve. Therefore, a gas throttle is integrated into the fixing and throttling piece to restrict the fuel gas flow. For this purpose, the fixing and throttling piece can include an integral flow channel for the fuel gas, within which the gas throttle is formed. The gas throttle is specifically designed as a predetermined constriction of the flow channel. The gas throttle is designed to be adjustable, meaning that the throttling effect can be increased and / or decreased, particularly by adjusting the freely flowing cross-section of the flow channel.

[0016] The design of the fixing and throttling piece, especially when a gas shut-off valve is already flanged on, allows for easy pre-adjustment of the fuel gas supply, even before installation. The unit, consisting of the gas shut-off valve and the fixing and throttling piece, is very compact and easily accessible. This allows the unit, which may be pre-set, to be attached to the combustion chamber door in a space-saving manner, requiring only fine-tuning of the gas throttle. This fine-tuning can even be carried out in confined spaces and after the mounting assembly has been installed.

[0017] The openings of the fixing and throttling element can be arranged in a regular pattern and / or a division with a defined angular range on the fixing and throttling element. One embodiment of a regular pattern is, for example, a polygon (triangle, square, hexagon, octagon, etc.), where the openings can be located at the vertices and / or edges. If the openings are arranged, for example, on a non-straight, curved, and / or circular line, they have a regular division, i.e., in particular, an approximately equal spacing along the line and / or an approximately equal distance (directly) from each other. It is preferred that the regularity applies to all openings. It is possible for identical and / or different patterns / divisions to be provided, in particular arranged adjacent to each other, concentrically to each other, and / or parallel to each other.The pattern and / or division allows the fixing and throttling piece to be positioned in different locations in overlap with the connecting element receptacles of the gas shut-off valve.

[0018] The openings can form a circle or be arranged along an approximately circular line. It is preferred that this line has a circumferential division of at least 45 degrees. This means, in particular, that the distance (between the centers) of the openings is a maximum of 45 degrees. It is possible for the division to be even smaller, so that each division has an angular segment of only a maximum of 30 degrees, meaning the circle is designed with a division of at least 30 degrees. This allows the different positions that the fixing and throttling element on the gas shut-off valve can assume to be distinguished from one another by rotating the fixing and throttling element and / or the shut-off valve.

[0019] The connecting element receptacles of the gas shut-off valve can collectively form a connection plane for the fixing and throttling piece. This allows the fixing and throttling piece, in particular its (flat, possibly integral base plate), to rest on the gas shut-off valve in the same plane. The (end faces of the) connecting element receptacles of the gas shut-off valve can collectively define or form a support plane for the fixing and throttling piece. A connection can then be achieved on the gas shut-off valve by means of the connecting elements without spacers and / or a complex shape for the fixing and throttling piece.

[0020] The fixing and throttling piece can be detachably fixed to the gas shut-off valve using the connecting elements when the passage openings are covered by the connecting element receptacles.

[0021] The gas shut-off valve may have a protruding nozzle in the area of ​​the connecting element receptacles. This protruding nozzle is, in particular, an end section of a gas line of the gas shut-off valve through which the gas is supplied to the combustion chamber. The base plate or bottom of the fixing and throttle piece has a central area with a recess in which the nozzle can be received. The nozzle, in particular, forms a flow channel for the outgoing combustion gas, the free-flowing cross-section of which is (many times) larger than the free-flowing cross-section in the area of ​​the gas throttle of the fixing and throttle piece. It is possible that the gas throttle directly reduces the free-flowing cross-section of the nozzle.

[0022] Preferably, no through-hole is provided in the central area of ​​the fixing and throttling piece. The through-holes are preferably arranged distributed around the central area of ​​the base plate or bottom.

[0023] The recess in the central area is designed to allow the nozzle to be inserted. In particular, the recess can replicate the outer contour of the nozzle, ensuring a precise fit. Sealing and / or fitting elements may be provided in the area between the nozzle and the recess.

[0024] It is possible that a (protruding, especially circumferential) collar is arranged on the side of the recess opposite the gas shut-off valve or its nozzle. This collar can represent a continuation of the gas shut-off valve's nozzle on the fixing and throttling piece. Thus, it is possible that the gas shut-off valve's nozzle is inserted into the recess of the fixing and throttling piece, and that a collar identical or corresponding to the nozzle continues (aligned) on the opposite side of the fixing and throttling piece.

[0025] It is possible for the fixing and throttling element to be attached to the gas shut-off valve in at least two mounting positions, with a second mounting position being offset and / or rotated by a rotation angle of less than 180 degrees from a first mounting position. It is also possible for the fixing and throttling element to be attached to the gas shut-off valve in several offset and / or rotated mounting positions. The offset and / or rotation occurs around an axis of rotation that passes through the gas shut-off valve, preferably through the center of the protruding nozzle. This allows the fixing and throttling element to be rotated around the nozzle and assume different positions. The distribution of the through-holes allows the fixing and throttling element to be attached to the gas shut-off valve at these positions using the same connecting elements and the same connecting element receptacles of the gas shut-off valve.

[0026] The fixing and throttling piece can have at least one stop surface equipped with additional connecting element receptacles. The stop surface is angled or inclined relative to the base plate or floor, in particular at an angle of approximately 90 degrees. The stop surface, like the base plate or floor, can be formed integrally with the fixing and throttling piece.

[0027] The additional connecting element receptacles allow the fixing and throttle piece to be secured in or on the heating device. The connecting element receptacles on the stop surface preferably have a different orientation than the through-holes of the fixing and throttle piece.

[0028] A connection base that opens into a fuel gas-air duct of a combustion chamber door of a heating appliance's burner can serve as a mounting point for a connection element on the burner door. The combustion chamber door forms a closure to a combustion chamber, which houses the burner on one side. On the other side of the combustion chamber door, channels and ducts can be arranged that supply fuel, in particular a mixture of fuel gas and combustion air, especially ambient air, to the burner. The combustion chamber door can include a fuel gas-air duct that supplies the burner with a mixture of combustion air and fuel gas. Such a fuel gas-air duct can branch at or near the connection base. In particular, the fuel gas duct can merge with the combustion air duct in the area of ​​the connection base or shortly thereafter.The mounting assembly, comprising a gas shut-off valve and a fixing and throttling piece, can be attached to the connection base as a connection element.

[0029] A gas throttle for the gas shut-off valve is integrated into the fixing and throttle piece. Within this piece, the gas throttle forms part of the fuel gas channel. The gas throttle can be formed integrally with the fixing and throttle piece, at least partially, or even exclusively (except for adjustable throttle sections). A gas throttle can be used to restrict the flow of fuel gas through a fuel gas channel, in particular to (fully) open or (partially) close the fuel gas channel. The gas throttle provides a means of safely connecting a fuel gas supply to the heating appliance.

[0030] The gas throttle comprises at least one externally adjustable throttling element, in particular screws, threaded bolts, slides, adjusting knobs, etc. The throttling element is connected to, or connectable to, the fixing and throttle piece. It can be operated externally, in particular with a tool or by hand. The throttling element allows the throttle to be opened and closed, as well as the degree of opening to be set. The throttling element can be designed so that it is initially opened after assembly and before commissioning of the heating unit, and the degree of opening is then set, ideally remaining in this setting during subsequent operation. During maintenance work, final decommissioning, and / or dismantling of the heating unit, the gas throttle can be closed using the throttling element.With such a closed gas throttle, it is possible to dismantle the heater without the risk of gas leakage. A gas connection to the combustion gas channel and to a burner of the heater is thus prevented.

[0031] The fixing and throttling piece can be equipped with several throttling elements, preferably two. Actuating these multiple throttling elements allows, for example, coarse and fine adjustment. The coarse and fine adjustments are controlled by the throttling elements. This is achieved by externally adjusting the throttling elements, which open and close the coarse and fine adjustments within the combustion gas channel of the fixing and throttling piece, in or on which the gas throttle is located. A coarse adjustment provides one way of opening and closing the gas throttle. After the coarse adjustment, the fine adjustment allows for setting the degree of opening of the gas throttle to a preset flow rate of the desired combustion gas volume.

[0032] The gas throttle can comprise multiple throttle openings, each of which can be opened, adjusted, and / or closed by one of the throttle elements. In other words, the combustion gas channel in the area of ​​the gas throttle can have separate passages, each with a (different) throttle opening. A throttle opening can be configured, in particular, as a slot with a predetermined width, as a circle with a variable diameter, as an opening that can be modified with a movable tip, and / or as a crescent with a variable size leading to a circular opening. Specifically, it is possible for the throttle element to change the size of the throttle opening by covering / blocking and then releasing it, depending on the position of the throttle element relative to the throttle opening.

[0033] An adjustment lock can be provided for at least one throttle element. This adjustment lock can be designed to prevent the degree of opening of the throttle orifices from changing during operation. Such a change can be caused by the continuous flow of fuel gas. The adjustment lock can act directly on the throttle orifices or on the throttle elements themselves. For example, the adjustment lock can prevent a change in the size of the throttle orifice that occurs independently of the throttle elements. The adjustment lock can be achieved, in particular, by a counter-rotating screw element. The adjustment lock can partially cover or enclose the throttle element to prevent it from being (accidentally) actuated from the outside (by hand or with a predetermined tool). The adjustment lock can include a latch, a seal, etc.

[0034] For each throttling element, chambers are integrated into the fixing and throttling piece, the chambers being gas-tight. One chamber connects the external environment of the fixing and throttling piece to the combustion gas channel. The chamber is designed to accommodate (only) one predetermined throttling element. The chamber is designed to accommodate a throttling element (partially or completely) while ensuring that it can still be actuated from the outside. The chamber can extend to the throttling opening.

[0035] A throttling element can thus also be sealed against gas leakage. The sealing takes place within the chambers in which the throttling elements are located. Therefore, the sealing does not need to be done directly on the throttling elements themselves. The chambers can be sealed, in particular, using pre-made sealing plugs or liquid and curing sealant. Sealing the throttling elements themselves is also possible. For this purpose, sealing measures, especially sealing rings or liquid and curing sealant, can be applied directly to the throttling elements, provided that the sealing measures are not adversely affected by opening, adjusting, and / or closing the throttling elements.

[0036] The combustion gas channel can be arranged on a combustion gas-air channel integrated into and / or attached to the combustion chamber door. The combustion gas-air channel and the end section of the combustion gas channel, where the mounting assembly is attached, can be completely surrounded by or embedded in the material of the combustion chamber door. It is possible for the combustion chamber door to be a cast part with integrated channels.

[0037] The connection base can have receptacles for connecting a mounting assembly comprising a gas shut-off valve and a fixing and throttling piece with detachable connecting elements. The connection base thus includes a gas shut-off valve which is to be permanently arranged on the heating device, particularly inside the housing and outside the combustion chamber of the heating device, by means of a predetermined number of detachable (identical or similar) connecting elements. The number of receptacles and the number of connecting elements are identical. A central end section of the combustion gas channel formed in the connection base can be designed to match the collar of the fixing and throttling piece, preferably with a gas-tight connection being implemented.

[0038] Furthermore, a heating device with a burner and a combustion chamber door contributes to solving the problem, wherein the presented mounting arrangement with a gas shut-off valve can be or is attached to the combustion chamber door.

[0039] Regarding the design of the fastening arrangement, full reference can be made to the above explanations and / or the explanations in connection with the figures.

[0040] The mounting assembly with a gas shut-off valve can be attached to the combustion chamber door. The mounting assembly with the gas shut-off valve is secured to the connection base on the combustion chamber door using detachable fasteners, in particular screws, threaded bolts, etc. These fasteners can be connected to fastener receptacles, which are formed, in particular, in the outer contour or the fixing and throttling element, especially in the form of (matching) threaded bores.

[0041] It is possible to use the mounting assembly with different gas shut-off valves in such a way that the aforementioned conditions are met and the mounting assembly can be arranged within the installation space of the burner door. The differences in the gas shut-off valves relate in particular to the arrangement (pattern) of the connecting element receptacles. The arrangement of the through-holes on the base plate can therefore represent several different arrangements of connecting element receptacles with the desired number. Thus, different gas shut-off valves can be used by attaching them in different mounting positions on the fixing and throttle piece, so that the mounting assembly can be attached to the combustion chamber door and fits within the installation space of the combustion chamber door. The mounting position used therefore depends on the given installation space of the combustion chamber door in which the mounting assembly is used.

[0042] The invention and its technical context are explained in more detail below with reference to five figures. The illustrations are schematic and not intended to demonstrate scale relationships. The explanations relating to individual details of the figures can be extracted and freely combined with information from the preceding description, unless a person skilled in the art would necessarily conclude otherwise, or such a combination is explicitly excluded. The figures schematically show: Fig. 1 : a mounting arrangement comprising a gas shut-off valve and a fixing and throttling piece, shown in two mounting positions, Fig. 2 : a fixing and throttling piece of a fastening arrangement from below, Fig. 3 : a fixing and throttling piece of a fastening arrangement from the side above, Fig. 4 : a combustion chamber door of a burner of a heating appliance, having a connection base with gas throttle and gas shut-off valve.

[0043] Fig. 1 Figure 1 shows a fastening arrangement 12 comprising a gas shut-off valve 3 and a fixing and throttling piece 13, which is shown here in two fastening positions 20 rotated by 90°, wherein the fixing and throttling piece 13 can be optionally attached to the gas shut-off valve 3 in either of the fastening positions 20.

[0044] The gas shut-off valve 3 has a connection plane 16 on which four connection element receptacles 5 are located. A central nozzle 17 penetrates the connection plane 16 and is arranged within the four connection element receptacles 5. The nozzle 17 is designed as a tubular nozzle that rises from the connection plane 16. The connection element receptacles 5 do not contact the nozzle 17. Each connection element receptacle 5 is positioned at approximately the same distance from the nozzle 17 on the connection plane 16.

[0045] The fixing and throttling piece 13 comprises a base, also referred to here as the base plate 14. A plurality of through-openings 15 are arranged on the base plate 14. A collar 21 is arranged centrally on the base plate 14. The two illustrated mounting positions 20 are rotated relative to each other by 90 degrees. A mounting position 20 is achieved when each connecting element receptacle 5 overlaps with a through-opening 15. The fixing and throttling piece 13 can be moved into one of the mounting positions 20 by rotation. A rotation of the fixing and throttling piece 13 to achieve a second mounting position 20 can be offset from a first mounting position 20 if the rotation angle is less than 180 degrees.

[0046] Upon reaching a mounting position 20, the fixing and throttling piece 13 can be attached to the connection plane 16 of the gas shut-off valve 3 using the detachable connecting elements 4. For this purpose, the detachable connecting elements 4 are inserted through the through-holes 15 on the base plate 14 of the fixing and throttling piece 13 into the connecting element receptacles 5 of the gas shut-off valve 3 and secured in the connecting element receptacles 5. By being secured in the connecting element receptacles 5, the detachable connecting elements 4 press the fixing and throttling piece 13 onto the gas shut-off valve 3.

[0047] Fig. 2 Figure 1 shows a variant embodiment of the fixing and throttling piece 13 of a fastening arrangement 12 in a bottom view. A central area 18 is arranged in the middle of the base plate 14, which has a recess 19. The recess 19, which is arranged in the central area 18, is rounded and shaped such that the nozzle 17 of the gas shut-off valve (see Figure 1) Fig. 1 ) fits into it. The passage openings 15 are arranged around the central area 18. The passage openings 15 form a circle around the central area 18. The passage openings 15 are spaced apart from each other at a defined angular interval on the circle, with a division of at least 45 degrees. The passage openings 15 are arranged on the base plate 14 such that they do not touch the edge of the base plate 14 or the central area 18.

[0048] Furthermore, it shows Fig. 2 Two differently sized throttle openings 27 and corresponding throttle elements 22 are shown. The fuel gas channel 8, in which the gas throttle 7 is located, is visible. The gas throttle 7 and the fuel gas channel 8 are part of the fixing and throttle piece 13. The throttle comprises throttle openings 27, with the illustrated embodiment featuring a coarse adjustment 32 and a fine adjustment 31. A coarse adjustment 32 represents a larger throttle opening 27. The smaller throttle opening 27 of the fine adjustment 31 allows for a finer and more precise adjustment of the throttle after an opening of the throttle has already been created via the coarse adjustment 32.

[0049] Fig. 3 Figure 1 shows a variant embodiment of the fixing and throttling piece 13 of a fastening arrangement 12 in a side-top view. A stop surface 23 with connecting element receptacles 5 is arranged on one front side. The stop surface 23 allows the fixing and throttling piece 13 to be positioned against another element (of a heating device).

[0050] A projecting and circumferential (cylindrical) collar 21 is arranged centrally on the central area 18 of the base plate 14. The collar 21 encompasses the recess 19 and represents a kind of extension of the opposite strut 17 of the gas shut-off valve 3.

[0051] An adjustment of the throttle openings 27 (see Fig. 2 The adjustment can be achieved via the throttle elements 22. Each throttle opening 27 is adjusted by a throttle element 22. Each throttle element 22 is arranged in a chamber 29. Furthermore, it is possible to secure the throttle elements 14 against displacement by means of adjustment locks 28 (not shown). The adjustment locks 28 prevent the throttle elements 22 from being affected during use and from unintentionally closing or opening further. The fixing and throttle piece 13 includes chamber seals 30 for sealing the chambers 29.

[0052] Fig. 4Figure 1 represents a heating appliance 1 with a burner 2 and a combustion chamber door 6 with a connection base 25. A gas shut-off valve 3 is attached to the combustion chamber door 6 by means of a mounting assembly 12, comprising a gas shut-off valve 3 and a fixing and throttle piece 13. The combustion chamber door 6 has a recess 24 that allows the mounting assembly 12 to be attached to the combustion chamber door 6. The mounting assembly 12 is attached to the combustion chamber door 6 in such a way that connection elements can be connected to the gas shut-off valve 3, in particular a fixing and throttle piece 13 and a fuel gas supply 11. The gas shut-off valve 3 is arranged with the fixing and throttle piece 13 at an inlet to a fuel gas channel 8, which opens into a fuel gas-air channel 9. A combustion air supply 10 is arranged on the fuel gas-air channel 9.

[0053] In a state connected to the connection base 25, the gas shut-off valve 3 allows the gas shut-off valve 3 to form a flow connection with the gas throttle 7 in the fixing and throttle piece 13 from the fuel gas supply 11 to a fuel gas channel 8, through which a fuel gas can flow.

[0054] The connection base 25 includes an internal fuel gas channel 8. The fuel gas channel 8 opens into a branch that has an inlet to a fuel gas-air channel 9 and an outlet to a combustion air supply 10. Fuel gas and combustion air are combined in the fuel gas-air channel 9. The combustion air is supplied to the fuel gas-air channel 9 via the combustion air supply 10, and the fuel gas is supplied via the fuel gas channel 8. The fuel gas-air channel 9 supplies the mixture of fuel gas and combustion air to the burner 2. The burner 2 is located in a combustion chamber 26.

[0055] The fuel gas-air channel 9, the connection base 25 with the fuel gas channel 8, as well as the burner 2 and the combustion air supply 10 are partially or completely integrated into the combustion chamber door 6 as one component.

[0056] This revealed how the problems described with reference to the state of the art were at least partially solved. In particular, a method was created to avoid incorrect installation of the gas throttle on the gas shut-off valve, thus preventing hazards to the customer and / or delays in the production of a heating appliance 1. Reference symbol list

[0057] 1 Heater 2 Burner 3 Gas shut-off valve 4 Detachable connecting element 5 Connecting element receptacle 6 Combustion chamber door 7 Gas throttle 8 Fuel gas channel 9 Fuel gas-air channel 10 Fuel air supply 11 Fuel gas supply 12 Mounting arrangement 13 Fixing and throttle piece 14 Base plate 15 Through opening 16 Connection plane 17 Spigot 18 Central area 19 Recess 20 Mounting position 21 Collar 22 Throttle element 23 Stop surface 24 Installation space 25 Connection base 26 Combustion chamber 27 Throttle opening 28 Adjustment lock 29 Chamber 30 Chamber seals 31 Fine adjustment 32 Coarse adjustment

Claims

1. Fastening arrangement (12) comprising a gas shut-off valve (3) and a fixing and throttling piece (13), which on the one hand is designed for fixing to the gas shut-off valve (3) by means of a number of detachable connecting elements (4) and on the other hand has a gas throttle (7) for throttling a flow of fuel gas from the gas shut-off valve (3), wherein the gas shut-off valve (3) is designed with connecting element receptacles (5) corresponding to the number of detachable connecting elements (4), wherein the fixing and throttling piece (13) is designed with passage openings (15) for the detachable connecting elements (4), wherein more passage openings (15) than connecting element receptacles (5) are provided, or at least some of the passage openings (15) cannot be brought into alignment with the connecting element receptacles (5).

2. Fastening arrangement (12) according to the previous claim, characterised in that the passage openings (15) are arranged in a regular pattern and / or pitch with a specified angle range in the fixing and throttling piece (13).

3. Fastening arrangement (12) according to one of the preceding claims, characterised in that the gas shut-off valve (3) has a protruding connection piece (17) in the area of the connecting element receptacles (5), wherein the fixing and throttling piece (13) has a base plate (14) with a central region (18) with a recess (19) for receiving the spigot (17), wherein the gas throttle (7) is positioned at the recess (19).

4. Fastening arrangement (12) according to one of the previous claims, characterised in that the fixing piece (13) can be fixed to the gas shut-off valve (3) in at least two fixing positions (20), wherein a second fixing position (20) is offset from a first fixing position (20) by a rotation angle of less than 180 degrees.

5. Fastening arrangement (12) according to one of the preceding claims, characterised in that the gas throttle (7) is designed with at least one throttle element (22) that can be adjusted from the outside.

6. Fastening arrangement (12) according to the previous claim, characterised in that a plurality of throttle elements (22) are provided, the actuation of which allows coarse adjustment (32) and fine adjustment (31), and in that a gas throttle (7) comprises a plurality of throttle openings (27), each throttle opening (27) being adjustable by one of the throttle elements (22).

7. Fastening arrangement (12) according to one of claims 5 to 6, characterised in that chambers (29) for each throttle element (22) are integrated in the fixing and throttle piece (13) and, in particular, can be closed in a gas-tight manner.

8. Heating appliance (1) with a burner (2) and a combustion chamber door (6), characterised in that a fastening arrangement (12) with a gas shut-off valve (3) according to one of the previous claims is fastened to the combustion chamber door (6).

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