Patent Application
20240003592
The invention relates to a heating device according to the preamble of claim 1.
A heating device of the type mentioned at the start is known from patent document EP 3 540 325 B1. This heating device consists of a housing closed with (at least) a cover element and enclosing a combustion chamber, wherein an opening for receiving a burner device pointing into the combustion chamber is provided on the cover element, wherein the opening is delimited by a first cylindrical sheet section of the cover element, wherein the first sheet section is connected to a second sheet section of the cover element so as to face away from the combustion chamber. In this solution, the second sheet section is also cylindrical such that reshaping inwards results in an overlapping or folded double layer.
The object of the invention is to improve a heating device of the type mentioned at the start. In particular, it is intended to create an opening with a very rigid contact area for the burner device, despite the use of a relatively thin-walled sheet.
This object is achieved with a heating device of the type mentioned at the start by the features listed in the characterizing part of claim 1.
According to the invention, it is therefore envisaged that the second sheet section extends radially outwards (starting from the first sheet section) as a contact flange for the burner device.
In other words, the solution according to the invention is thus characterized in that a particularly rigid contact flange is created as a result of an angular (i.e. not parallel), in particular rectangular, arrangement of the two sheet sections relative to one another.
Other advantageous further developments of the heating device according to the invention result from the dependent claims.
The heating device according to the invention including its advantageous further developments according to the dependent claims are explained in more detail below using the graphic representation of a preferred exemplary embodiment.
The heating device illustrated in the figures initially consists, in a way known per se, of a housing 3 closed with (at least) a cover element 1 and enclosing a combustion chamber 2, wherein an opening 4 for receiving a burner device 5 (preferably for the combustion of a fluid fuel such as gas or oil) pointing into the combustion chamber 2 is provided on the cover element 1, wherein the opening 4 is delimited by a first cylindrical, particularly preferably circular-cylindrical sheet section 1.1 of the cover element 1, wherein the first sheet section 1.1 is connected to a second sheet section 1.2 of the cover element 1 so as to face away from the combustion chamber.
Furthermore, it is, as illustrated, preferably envisaged that a preferably helical heat exchanger 10 enclosing the combustion chamber 2 is arranged in the housing 3.
In addition, it is preferably envisaged that the housing 3 is formed with an exhaust gas jacket space 11 and this surrounds the heat exchanger 10 enclosing the combustion chamber 2.
Furthermore, it is preferably envisaged, as can be seen in
Moreover, it is preferably envisaged, as can be seen in
Furthermore, for anti-corrosion purposes, it is preferably envisaged that the two sheet sections 1.1, 1.2 and/or the housing 3 are optionally formed from a stainless steel sheet.
It is now essential for the heating device according to the invention that the second sheet section 1.2 extends radially outwards as a contact flange for the burner device 5. As already mentioned at the start, this measure leads to a particularly high level of rigidity of the contact flange, against which the burner device 5 or its base body 5.1 is braced, even when using comparatively thin-walled material.
As can be seen particularly clearly in
Furthermore, it is particularly preferably provided that the first cylindrical sheet section 1.1 is at least 10 mm long in the direction of its cylinder axis, preferably more than 15 mm long. This requirement has the advantage that the second sheet section 1.2 is arranged relatively far from the combustion chamber 2 and thus little heat is transferred to the sealing ring 8 to be protected from high temperatures.
In addition, it is particularly preferably envisaged that the second sheet section 1.2 optionally extends at least 5 mm and/or at most 25 mm in a radial direction between its free end and the first sheet section 1.1. In this way, the cover element 1 can easily be made stable.
Furthermore, it follows from the previous explanations that the second sheet section 1.2 is preferably annular.
Furthermore, it is particularly preferably envisaged that the first cylindrical sheet section 1.1 is arranged between the second sheet section 1.2 and a third sheet section 1.3 extending to the housing 3.
As can be seen particularly clearly in
Considered as a whole, it is further preferably envisaged that the three sheet sections 1.1, 1.2, 1.3 are formed from one piece of sheet metal by sheet metal forming.
When fixing the burner device 5, in order to avoid having to apply forces to the third sheet section 1.3, which as mentioned, is important for the arrangement of the heat exchanger, it is further particularly preferably envisaged that (at least) an abutment element 6 for the burner device 5 is optionally arranged on the first cylindrical sheet section 1.1 and/or on the second sheet section 1.2.
In more detail, it is preferably envisaged that the abutment element 6 interacts with the burner device 5, preferably with the base body 5.1.
In addition, it is preferably envisaged that the second sheet section 1.2 is arranged between the abutment element 6 and the burner device 5.
Furthermore, it is particularly preferably envisaged that the burner device 5, preferably the base body 5.1, is firmly, but releasably, connected to the abutment element 6 by means of a screw (for example, as illustrated, with a machine screw) or clamping connection (for example, not illustrated in addition, as a bayonet lock) 7. In this case, the abutment element 6 is particularly preferably, as shown in
In order to further protect the sealing ring 8, it is further preferably envisaged that the burner device 5 is provided with a thermal insulation body 9 facing the combustion chamber 2 and arranged at least partly in the region of the first cylindrical sheet section 1.1 and having a cylindrical outer contour with a thermal insulation body cylinder diameter. It is further particularly preferably envisaged that the first cylindrical sheet section 1.1 has a sheet section cylinder inner diameter that is only slightly larger than or equal to the thermal insulation body cylinder diameter. As a result, there is therefore only a very narrow gap (preferably at most 2 mm, particularly preferably at most 1 mm, very particularly preferably at most 0.5 mm) between the first cylindrical sheet section 1.1 and the thermal insulation body 9, which results in only very little, if any, hot exhaust gas reaching the region of the second sheet section 1.2 and thus the sealing ring 8.
As a further measure to protect the sealing ring 8, it is further preferably envisaged that the combustion chamber 2, which as mentioned above, is enclosed by the heat exchanger 10, is at least partly cylindrical and has a combustion chamber cylinder inner diameter. Finally, it is particularly preferably envisaged that the first cylindrical sheet section 1.1 has a sheet section cylinder inner diameter that corresponds to the combustion chamber cylinder inner diameter. A thermal insulation body 9 protruding into the combustion chamber 2 thus forms, as can be particularly clearly seen in
