EP4067742A1 - Method for attaching a gas nozzle to a gas valve, gas nozzle and heater - Google Patents

Abstract

A method for attaching a gas nozzle (2) to a gas valve (1) for a heater is proposed, comprising at least the following steps: a) Inserting a connection area (21) of the gas nozzle (2) into a gas outlet area (11) of the gas valve ( 1) with a second joining direction (31), b) introducing a fastening element (4) in a fastening area (22) of the gas nozzle (2) in the gas valve (1) with a first joining direction (32) which differs from the second joining direction (31 ) deviates. In addition, a gas nozzle (2) and a heater with a gas nozzle (2) are disclosed.

Description

The invention relates to a method for attaching a gas nozzle to a gas valve, a gas nozzle, a unit consisting of a gas nozzle and a gas valve and a heater.

Prior art gas fired heaters include a gas valve which regulates the flow of gas into the burner. The gas to be burned flows from the gas valve into a gas nozzle, which introduces it (together with an air flow supplied to the gas nozzle) into the intake duct of the burner.

According to the prior art, the gas valve and gas nozzle are connected by means of fastening clips or screws. Due to the small amount of space available, the connection must be very compact, in particular to enable space-saving assembly. At the same time, relatively high forces and/or moments can act on this connection during operation, which must therefore be absorbed permanently.

the DE 10 2004 007 123 B3 proposes a mixing device for a gas burner, comprising a housing and a venturi nozzle, the venturi nozzle being integrated into the housing in such a way that the housing and venturi nozzle are designed as a monolithic unit, with a gas control device having a monolithic unit Gas outlet socket engages, wherein the gas outlet socket engages in a recess of the monolithic unit.

In the known solutions for the connection of gas valve and gas nozzle, it has been shown that these are often subject to the loads, especially during maintenance work or assembly, does not withstand. A failure of the connection can result in gas leakage.

Proceeding from this, it is the object of the invention to propose a method for fastening a gas nozzle to a gas valve for a heater which at least partially overcomes the problems of the prior art described and in particular meets the requirements for high stability and a compact design.

In addition, the proposed method should be cost-effective and can be carried out with simple means.

These objects are solved by the features of the independent patent claims. Further advantageous refinements of the solution proposed here are specified in the independent patent claims. It is pointed out that the features listed in the dependent patent claims can be combined with one another in any technologically meaningful manner and define further refinements of the invention. In addition, the features specified in the patent claims are specified and explained in more detail in the description, with further preferred configurations of the invention being presented.

1. a) Einführen (mindestens) eines Verbindungsbereiches der Gasdüse in (mindestens) einen Gasaustrittsbereich des Gasventils mit einer zweiten Fügerichtung,
2. b) Einbringen (mindestens) eines Befestigungselementes durch (mindestens) einen Befestigungsbereich der Gasdüse in das Gasventil mit einer ersten Fügerichtung, die von der zweiten Fügerichtung abweicht.

A method for attaching a gas nozzle to a gas valve for a heater, which comprises at least the following steps, contributes to this:

1. a) introducing (at least) one connection area of the gas nozzle into (at least) one gas outlet area of the gas valve with a second joining direction,
2. b) Introduction of (at least) one fastening element through (at least) one fastening area of the gas nozzle into the gas valve with a first joining direction that deviates from the second joining direction.

Steps a) and b) can be carried out at least once in the specified order and/or sequentially in a regular process flow.

According to a step a), a connection area of the gas nozzle is introduced into a gas outlet area of the gas valve with a second joining direction. The connection area can be a protruding shaped element of the gas nozzle, which is preferably connected or designed in one piece with an adjacent shaped element. The connection area can be an at least partially exposed, in particular straight, hollow cylinder which, after insertion into the gas outlet area of the gas valve, is enclosed at least over part of its surface, preferably over its entire surface. In other words, the connection area in the gas outlet area of the gas valve can be accommodated by a corresponding geometric shape element of the gas valve. In an advantageous manner, a secure, in particular gas-tight connection for the gas transport from the gas outlet area into the gas nozzle can be achieved through the connection area of the gas nozzle. The connection is advantageously particularly torque-proof for rotational forces from the gas nozzle relative to the gas valve. The insertion takes place along a second joining direction.

The connection area is designed in such a way that gas escaping from the gas outlet area of the gas valve can be routed through the connection area into the gas nozzle. The connection area can form (on the inside) a flow path for the gas entering the gas nozzle and (on the outside) a contact and/or alignment surface towards the outlet or gas outlet area of the gas valve.

A single connection area is preferably provided if the gas valve is designed with a single gas outlet area and the gas nozzle is designed with a single gas inlet area.

A gas-tight connection can be established between the gas outlet area of the gas valve and the connection area. For example, a sealing element, for example a sealing ring, can be provided in the connection area of the gas nozzle and/or in the gas outlet area of the gas valve and a sealing surface in the corresponding area of the respective other component.

According to step b), the fastening element is introduced into a fastening area of the gas nozzle in the gas valve with a first joining direction that deviates from the second joining direction. The first joining direction and the second joining direction can therefore define or enclose an angle to one another, which can be in the range of 30 to 120 angular degrees, for example.

The gas nozzle can at least partially enclose an edge of the gas valve, with the connection area and the fastening element being introduced into different sides of the gas valve adjacent to the edge. In other words, the gas nozzle itself preferably forms an edge that corresponds to an edge of the gas valve and partially encloses it. The connection area and the gas outlet area are associated with one adjacent side of the edge and the attachment area of the gas nozzle is associated with the other adjacent side of the edge. A very stable connection can advantageously be created by enclosing an edge of the gas valve with the gas nozzle.

An edge is present in particular where two outer surfaces of the gas valve or the gas nozzle meet. It is preferred that the edge on the gas valve forms a kind of elevation, projection, etc. on the outer shape of the gas valve and/or a kind of indentation, recess, etc. in the outer shape of the gas nozzle. The angle enclosed by the (preferably substantially flat) outer surfaces is in particular in the range of approximately 90° in each case, but can also be in a different range. the opposite ones Outer surfaces, each delimiting an edge, can be designed to be aligned with one another, to run parallel and/or to cover the surface (in the installed state).

In the joined state, the gas nozzle can rest flat on the gas valve with the fastening area and/or in the vicinity of the connection area, ie touch it (entirely or completely) with the (predetermined) contact surface. This configuration can also advantageously improve the stability of the connection, in particular with regard to rotational loads.

The fastening element can be inserted at a distance from the edge. In other words, this means in particular that a fastening element interacts with or is connected to a region of an outer wall of the gas valve that is not directly adjacent to the edge, but rather at a distance from it. The distance can also bring about an increase in the stability of the connection between the gas nozzle and the gas valve, because the forces on the fastening element are reduced due to the leverage of the distance, for example when the connection is subjected to rotational loads. The specific design is selected depending in particular on the external shape of the gas valve.

The fastening area and the outer area surrounding the gas valve or lying on the gas valve can be designed in terms of material selection and geometric shape such that twisting due to the loads to be expected during operation can be reduced or even largely eliminated. In this way, material failure can be prevented and/or a secure, torsion-resistant connection between the gas nozzle and the gas valve can be achieved.

A screw or screw connection is preferred as the fastening element. The screw is preferably passed through the fastening area of the gas nozzle and anchored or screwed into the gas valve. However, alternative or cumulative are also other fastening elements can be used, for example a protruding fastening element of the fastening area of the gas nozzle, which snaps into a corresponding area on the gas valve.

A first joining direction of the fastening element can be (essentially) perpendicular to the second joining direction of the connection area of the gas nozzle in the gas outlet area of the gas valve according to step a). A first joining direction refers here to the direction along which the fastening element is introduced into the gas valve. A second joining direction is the direction along which the connection area of the gas nozzle is introduced into the gas valve. This configuration can be implemented, for example, by the gas nozzle enclosing a (vertical) edge of the gas valve. Advantageously, the stability of the connection can be further increased by joining directions arranged perpendicular to one another.

It goes without saying that, according to the proposed method, angles other than right angles can also enclose between the first joining direction of the fastening element and the second joining direction of the connection area of the gas nozzle in the gas outlet area of the gas valve. Angles in the range between 20° and 160°, between 40° and 140° or between 60° and 120° are preferred. The selection of the angle can depend on the specific design of the gas valve and gas nozzle and the structural conditions in the heater. An advantageously improved stability of the connection can be achieved in this angle range.

A flow direction of a gas flow (in particular air flow) through the gas nozzle (or the position of the flow channel for the air) can be perpendicular to the second joining direction of the connection area of the gas nozzle in the gas outlet area of the gas valve according to step a). Advantageously, the gas valve can be arranged in a compact design next to the air intake duct of the burner.

Another aspect relates to a gas nozzle for a gas valve of a heater, which comprises (at least) one fastening area for (at least) one fastening element and (at least) one connection area for connection to (at least) one gas outlet area, the fastening element and the connection area having different joining directions . It is possible for the fastening element to form a central axis along which it acts between the gas nozzle and the gas valve (e.g. first joining axis which is parallel to the first joining direction). It is possible that the connecting area (also) forms a central axis along which it is/is introduced into the gas valve (e.g. second joining axis which is parallel to the second joining direction). In the case of the gas nozzle, the first joining axis and the second joining axis can be designed at an angle to one another. The proposed gas nozzle enables a simple, compact yet very stable attachment to a gas valve.

According to a preferred embodiment of the gas nozzle, the joining directions of the fastening element and the connecting area can be aligned at right angles to one another.

According to a further preferred embodiment of the gas nozzle, a sealing area can be provided in the connection area. The sealing area can have a sealing element or be a sealing surface.

According to a further preferred embodiment, the gas nozzle can be made of plastic. A large number of suitable plastics are known in the prior art. Alternatively, the gas nozzle can also consist of a metallic material, for example steel, or also of a combination of different materials, for example plastic and metal.

A further aspect relates to a unit (joined or fastened to one another) consisting of a gas valve and a gas nozzle proposed here.

A further aspect relates to a heating device having a unit proposed here consisting of a gas valve and a gas nozzle or a gas nozzle proposed here.

The explanations of the method can also be used to characterize the devices specified here, and vice versa. In particular, the method can be used to produce a unit (joined or fastened to one another) from a gas valve and a gas nozzle proposed here.

A method for attaching a gas nozzle to a gas valve for a heater, a gas nozzle, a unit made up of a gas nozzle and a gas valve, and a heater are thus specified here, which at least partially solve the problems described with reference to the prior art. In particular, the method, the gas nozzle, the unit of gas nozzle and gas valve and the heater each at least contribute to making the attachment of a gas nozzle to a gas valve of a heater sufficiently stable for the loads that occur while at the same time having a compact design of the connection.

As a precaution, it should be noted that the numerals used here ("first", "second") primarily (only) serve to distinguish between several similar objects, variables or processes, i.e. in particular no dependency and/or sequence of these objects, variables or processes with one another is mandatory to pretend Should a dependency and/or order be necessary, this is explicitly stated here or it is obvious to the person skilled in the art when studying the specifically described embodiment. If a component can occur more than once ("at least one"), the description of one of these components can apply equally to all or part of the majority of these components, but this is not mandatory.

• Fig. 1: eine Gasdüse und ein Gasventil während der Durchführung von Schritt a) des hier vorgeschlagenen Verfahrens, und
• Fig. 2: eine Gasdüse und ein Gasventil während der Durchführung von Schritt b) des hier vorgeschlagenen Verfahrens.

The invention and the technical environment are explained in more detail below with reference to the attached figures. It should be pointed out that the invention should not be limited by the exemplary embodiments given. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and findings from the present description. In particular, it should be pointed out that the figures and in particular the proportions shown are only schematic. Show it:

• 1 : a gas nozzle and a gas valve during the implementation of step a) of the method proposed here, and
• 2 : a gas nozzle and a gas valve during the implementation of step b) of the method proposed here.

1 shows a gas nozzle 2 proposed here and a gas valve 1 during the implementation of step a) of the method proposed here. The gas nozzle 2 can include a connection area 21 which is designed in the form of a hollow cylinder or tube.

The gas nozzle 2 can be mounted in an air intake duct to introduce combustion gas into the air intake duct. The gas nozzle 2 can have a flow direction of the air flow 23 which is perpendicular to a second joining direction 31 of the connection area 21 to a gas outlet area 11 of the gas valve 1 .

Within the scope of step a), the gas nozzle 2 can be brought up to the gas valve 1 along the second joining direction 31 . The connection area 21 of the gas nozzle 2 can be introduced into a gas outlet area 11 of the gas valve 1 and surrounded by it.

The gas nozzle 2 can have a (protruding) fastening area 22 which runs essentially parallel to the second joining direction 31 (along a second joining axis 33) and can thus guide the joining process during step a). The fastening area 22 and the area in the vicinity of the connection area 21 can each comprise at least one bearing surface 24 which rests on the gas valve 1 during and/or after the gas nozzle 2 and the gas valve 1 are joined together.

The bearing surface 24 can include a first edge 25 which corresponds to a second edge 15 of the gas valve 1 . In the area of the second edge 15 of the gas valve 1, a first side 16 of the gas valve 1, in which the gas outlet area 11 is arranged, meets a second side 17, on which the fastening area 22 of the gas nozzle 2 rests in the connected state. Advantageously, an extremely stable connection between the gas valve 1 and the gas nozzle 2 can be achieved by the contact surface 24 which encloses a second edge 15 of the gas valve 1 .

2 shows a gas nozzle 2 proposed here and a gas valve 1 during the implementation of step b) of the method. The connection area 21 of the gas nozzle 2 was introduced into the gas outlet area 11 of the gas valve 1 and the bearing surfaces 24 of the attachment area 22 and in the vicinity of the connection area 21 rest on the gas valve 1 .

As part of step b), a fastening element 4 can now be anchored in a first joining direction 32 (along a first joining axis 34) through the fastening area 22 of the gas nozzle 2 in the gas valve 1. In a preferred embodiment, the fastening element 4 is a screw.

Due to the fact that the first joining direction 32 of the fastening element 4 and the second joining direction 31 of the connection area 21 of the gas nozzle 2 in Gas outlet area 11 of the gas valve 1 are arranged essentially perpendicular to one another, the two attachment points attachment element 4 and connection area 21 support each other because the second joining direction 31 of the connection area 21 loads the attachment element 4 only laterally in shear. In an advantageous manner, the gas nozzle 2 can be fastened to the gas valve 1 in a manner that is simple to produce but very stable and durable.

Reference List

1

gas valve

11

gas outlet area

15

second edge

16

first page

17

second page

2

gas nozzle

21

connection area

22

mounting area

23

Flow direction air flow

24

bearing surface

25

first edge

31

second joining direction

32

first joining direction

33

second joining axis

34

first joining axis

4

fastener

Claims (12)

A method for attaching a gas nozzle (2) to a gas valve (1) for a heater, comprising at least the following steps: a) Inserting a connection area (21) of the gas nozzle (2) into a gas outlet area (11) of the gas valve (1) with a second joining direction (31), b) introducing a fastening element (4) in a fastening area (22) of the gas nozzle (2) into the gas valve (1) with a first joining direction (32) which differs from the second joining direction (31). Method according to claim 1, wherein the gas nozzle (2) at least partially encloses an edge (15) of the gas valve (1) and the connecting region (21) of the gas nozzle (2) and the fastening element (4) into different sides adjacent to the edge (15). (16, 17) of the gas valve (1) are introduced. Method according to Claim 2, in which the gas nozzle (2) rests flat on the gas valve (1) with the fastening area (22) and in the vicinity of the connection area (21). Method according to Claim 2 or 3, in which the fastening element (4) is introduced at a distance from the edge (15). Method according to one of the preceding claims, in which the connection area (21) is at least partially cylindrical and is surrounded by the gas outlet area (11) of the gas valve (1). Method according to one of the preceding claims, in which a gas-tight connection is produced between the connection area (21) and the gas outlet area (11) of the gas valve (1). Method according to one of the preceding claims, wherein the first joining direction (32) is oriented perpendicular to the second joining direction (31). Method according to one of the preceding claims, wherein a flow direction (23) of an air flow through the gas nozzle (2) perpendicular to the second joining direction (31) of the connection area (21) of the gas nozzle (2) in the gas outlet area (11) of the gas valve (1) according to step a) is. Gas nozzle (2) for a gas valve (1) of a heater, having a fastening area (22) for a fastening element (4) and a connection area (21) for connection to a gas outlet area (11), the fastening element (4) having a second joining direction ( 31) and the connecting area (21) form a first joining direction (32) towards the gas valve (1), which deviate from one another and the gas nozzle (2) at least partially encloses an edge (15) of the gas valve (1), the connecting area (21 ) and the fastening element (4) are introduced into different sides (16, 17) of the gas valve (1) adjacent to the edge (15). Gas nozzle (2) according to Claim 9, in which the joining directions (31, 32) are aligned at right angles to one another. Gas nozzle according to one of Claims 9 or 10, a sealing area being provided in the connection area (21). Heating device, having a gas valve (1) and a gas nozzle (2) according to one of Claims 9 to 11.

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