Heating element for heaters

Description

[0001] The present invention relates to a heating element for heaters.

[0002] A current trend in the market of furniture components for heating is to provide heaters which have a spare styling and are as flat as possible.

[0003] Documents EP 0 908 693 and CH 532 238 disclose heaters with heating elements that have features at least one radiating module constituted by a metallic plate with two facing plate-like portions which are connected by longitudinal partitions (18) and delimit laterally a plurality of parallel ducts open at their ends, and two manifold modules which are fixed to the plate on opposite sides at the opposite end openings of the ducts. The two manifold modules, together with the ducts form a path for a heat transfer liquid. The heating element may be composed of a single or of several plates forming radiating modules that are mutually fixed at their lateral edges so that the ducts of all the radiating modules are parallel, the manifold modules being arranged transversely to all of the ducts at the opposite end openings Summarizing, the documents show the features of the preamble of claim 1.

[0004] For example, radiators composed in practice of radiating panels, constituted by a shell-and-tube heating element incorporated in a flat matrix which radiates its heat into the environment, are particularly appreciated.

[0005] The aim of the present invention is to provide a heating element for heaters which is particularly flat so that it can be associated with flat heaters, achieving in any case a heat efficiency which is perceived as satisfactory by the user.

[0006] Within this aim, an object of the present invention is to provide a heating element for heaters which is flexible in its association with flat heaters.

[0007] Another object of the present invention is to provide a heating element for heaters which has a reduced wall space occupation with respect to known heating elements.

[0008] Another object of the present invention is to provide a heating element for heaters which has excellent radiating capabilities.

[0009] Another object of the present invention is to provide a heating element for heaters which allows to achieve cost reductions for its manufacture and/or inventory management.

[0010] A further object of the present invention is to provide a heating element which can directly constitute a heater.

[0011] A still further object of the present invention is to provide a heating element which can be manufactured with known systems and technologies.

[0012] This aim and these and other objects, which will become better apparent hereinafter, are achieved by a heating element for heaters, according to the invention, that has the features set forth in claim 1.

[0013] Further characteristics and advantages of the invention will become better apparent from the following detailed description of a preferred but not exclusive embodiment thereof, illustrated by way of non-limiting example in the accompanying drawings, wherein:

Figure 1 is a partially sectional front view of a heating element for heaters according to the invention;

Figure 2 is a top view of the radiating module which composes a heating element for heaters according to the invention;

Figure 3 is a sectional side view of a heating element for heaters according to the invention;

Figure 4 is an enlarged-scale view of a detail of the lateral cross-section of Figure 3;

Figure 5 is a schematic perspective view of a corner portion of a heating element for heaters according to the invention;

Figure 6 is an exploded schematic perspective view of a corner portion of a heating element for heaters according to the invention;

Figure 7 is a front view of a heating element for heaters composed of three radiating modules which are welded laterally.

[0014] With reference to the figures, in a first embodiment a heating element for heaters according to the invention is generally designated by the reference numeral 10.

[0015] The heating element 10 comprises a radiating module 11, which is constituted by a metal plate 12 inside which, along its planar dimension, there are a plurality of parallel ducts 13, which are open at their ends 14.

[0016] The heating element 10 further comprises two manifold modules 15, which are fixed to the plate 12 respectively on opposite sides at the opposite end openings 14 of the ducts 13.

[0017] The two manifold modules 15, together with the ducts 13, form a path for a heat transfer liquid, such as hot water, which arrives from a heating system connected to the heating element 10.

[0018] In particular, the plate 12 is constituted by a single piece of extruded aluminum, which has a rectangular perimetric shape; in practice, the plate 12 has two facing plate-like portions, respectively a first plate-like portion 16 and a second plate-like portion 17, which are connected by longitudinal partitions 18 which delimit the ducts 13 laterally.

[0019] The ducts 13 therefore have a flattened rectangular contour.

[0020] A series of fins 19 protrudes at right angles outward from the first plate-like portion 16; said fins are parallel to the longitudinal dimension of the ducts 13 and are formed monolithically with the plate 12.

[0021] At the end openings 14 of the ducts 13, the second plate-like portion 17 protrudes beyond the end openings 14, forming a band 20 which is oriented transversely with respect to the ducts 13 (according to the orientation of the figures, there are two bands 20, an upper one and a lower one).

[0022] In practice, each manifold module 15 is formed by a single element which has a substantially L-shaped cross-section.

[0023] Each manifold module 15 rests, with a first longitudinal end edge 21, on the border 22 of the first plate-like portion 16 which corresponds to the region of the end openings 14 and, with its second longitudinal end edge 23, which is perpendicular to the first longitudinal end edge 21, against the second plate-like portion 17.

[0024] As shown in Figure 4, the second longitudinal end edge 23 of the manifold module 15 is wider, in order to rest well against the second plate-like portion 17, so that it is aligned with the end edge 24 thereof.

[0025] The manifold modules 15 also are made of extruded aluminum and are fixed to the plate 12 by welding.

[0026] Figure 4 also shows a bevel 25, which is formed on the first longitudinal end edge 21 in order to facilitate the welding of said region of the manifold module 15 to the plate 12.

[0027] In particular, the longitudinal partitions 18 which delimit laterally the ducts 13 protrude externally with respect to the border 22 of the first plate-like portion 16 which corresponds to the region of the end openings 14.

[0028] In this embodiment, the longitudinal partitions 18 that correspond to the side walls of the plate 12 reach the end edge 24 of the second plate-like portion 17, so as to close laterally the space delimited by the plate 12 and by the manifold modules 15.

[0029] Depending on the particular manufacturing requirements, each longitudinal partition 18 related to the inside of the plate 12 can protrude externally with respect to one of the two borders 22 of the first plate-like portion 16, obstructing the channel formed by the manifold module 15 together with the band 20 of the plate 12, so as to provide dividing walls 18a inside said manifold module which are adapted to form a particular path for the heat transfer fluid, which is useful for distributing said heat transfer fluid over the entire surface of the plate 12; in this embodiment there is a single dividing wall 18a arranged on the lower band 20.

[0030] In the manifold modules 15 there are also an intake hole 26 and a discharge hole 27 for the heat transfer fluid, which are connected to the duct of the hydraulic heating system, and there is a vent hole 28, where the vent valve is to be connected.

[0031] The intake hole 26 and the discharge hole 27 are arranged, for example, on opposite sides of the dividing wall 18a, while the vent hole 28 is located at the upper band 20.

[0032] At the corners 30 of the area occupied by the fins 19, said fins have a recess so as to provide space for positioning the wall supports 31 for the heating element 10.

[0033] A different embodiment of the heating element, now designated by the reference numeral 100, as shown in Figure 7, is described hereinafter.

[0034] This embodiment comprises three radiating modules 111 which are arranged side-by-side and are welded in pairs.

[0035] In particular, the plates 112 which form the radiating modules 111 are welded at the lateral edges 129 so that the ducts 113 of all the radiating modules 115 are parallel.

[0036] The two manifold modules 115 of course are arranged transversely to all the ducts at the opposite end openings 114 of said ducts.

[0037] In this case, the longitudinal partitions 118 which correspond to the outer side walls of the outermost plates 112 reach the end edge 124 of the second plate-like portion 117, so as to close laterally the space delimited by the plates 112 and by the manifold modules 115.

[0038] In this case also, the intake hole 126 and the discharge hole 127 are arranged, for example, on opposite sides of a dividing wall 118a, while the vent hole 128 is located at the upper band 20.

[0039] In both of the described cases, the preferred manufacturing method entails producing the plates and the manifold modules by extrusion and subsequent working, by chip-forming machining, said plates at the ends in order to obtain the geometry suitable to mate with the manifold modules.

[0040] In practice it has been found that the invention thus described achieves the intended aim and objects.

[0041] In particular, the present invention provides a modular heating element which allows to produce in a standardized manner substantially just two types of element, the radiating modules and the manifold modules, reworking them subsequently in order to adapt them to requirements.

[0042] Substantial cost reductions are thus obtained both in terms of production and in terms of storage, since it is necessary to manage substantially just two components.

[0043] The use of an extruded aluminum plate entails the possibility to obtain a very low thickness for the heating element and to obtain an integrated element without therefore having to assemble the various tubes which are typical of known shell-and-tube structures.

[0044] The reduced space occupation also leads to a reduced amount of water, to the full advantage of energy saving.

[0045] The fact of having aluminum modules allows to have reduced masses to be managed both during transport and during installation of the heating element and also allows to use wall supports which are smaller than those typically used for heaters made of heavier materials.

[0046] Moreover, aluminum is more resistant to the attack of metal deterioration phenomena, such as for example corrosion.

[0047] The reduced thickness and modular assembly make the heating element according to the invention adapted to be associated with aesthetic covering elements having various shapes and dimensions, in order to compose a design heater; at the same time, if finished with care, it can be used directly as a visible heater.

[0048] In practice, the materials employed, so long as they are compatible with the specific use, as well as the dimensions, may be any according to requirements and to the state of the art.

[0049] Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims

1. A heating element for heaters, of the modular type, comprising: at least one radiating module (11, 111), which is constituted by a metallic plate (12, 112) that has two facing plate-like portions, respectively a first plate-like portion (16) and a second plate-like portion (17), which are connected by longitudinal partitions (18) which delimit laterally a plurality of parallel ducts (13, 113) that are open at their ends (14, 114) and are formed within and extend along the planar dimension of said metallic plate (12, 112); and at least two manifold modules (15, 115), which are fixed to said plate (12, 112) respectively on opposite sides at the opposite end openings (14, 114) of said ducts (13, 113), said at least two manifold modules, together with said ducts (13, 113), forming a path for a heat transfer liquid, said heating element (10, 100) being composed selectively of a single said plate (12) or of several plates (112) forming the radiating modules (11, 111) that are mutually fixed at their lateral edges (129) so that said ducts (113) of all the radiating modules (111) are parallel, said at least two manifold modules (15, 115) being arranged transversely to all of said ducts (13, 113) at the opposite end openings (14, 114) of said ducts (113), characterized in that said second plate-like portion (17), at said end openings (14, 114) of said ducts (13, 113), protrudes beyond said end openings (14, 114), forming respective opposite bands (20), each of which is oriented transversely to said ducts (13, 113), each one of said manifold modules (15, 115) being formed by a single element which has a substantially L-shaped contour and rests, with a first longitudinal end edge (21) thereof, on the border (22) of said first plate-like portion (16), which corresponds to the region of said end openings (14, 114), and rests, with its second longitudinal end edge (23), which is perpendicular to said first longitudinal end edge (21), against said second plate-like portion (17).

2. The heating element according to claim 1, characterized in that said plate (12, 112) is constituted by a single piece of extruded aluminium.

3. The heating element according to claim 2, characterized in that said plate (12, 112) comprises a series of fins (19) protruding at right angles outward from said first plate-like portion (16), said fins being parallel to the extension of said ducts (13, 113), and being formed monolithically with said plate (12, 112).

4. The heating element according to claim 3, characterized in that said ducts (13, 113) have a flattened rectangular contour.

5. The heating element according to any of the claims 1-4, characterized in that said second longitudinal end edge (23) of each one of said manifold modules (15, 115) is wider so as to rest well against said second plate-like portion (17), so as to be aligned with the end edge (24) of said second plate-like portion (17), a bevel (25) being formed on each one of said manifold modules (15, 115) on said first longitudinal end edge (21), in order to facilitate the welding of said region of the manifold module (15, 115) to said plate (12, 112).

6. The heating element according to one or more of the preceding claims, characterized in that said manifold modules (15) also are made of extruded aluminum like said at least one radiating module (11, 111) and are fixed to said at least one radiating module (11, 111) by welding.

7. The heating element according to one or more of the preceding claims, characterized in that said longitudinal partitions (18) which delimit laterally said ducts (13, 113) protrude externally with respect to said border (22) of said first plate-like portion (16) which corresponds to the region of said end openings (14, 114).

8. The heating element according to one or more of the preceding claims, characterized in that said longitudinal partitions (18) which correspond to the side walls of the plate (12) reach the end edge (24) of the second plate-like portion (17), so as to close laterally the space delimited by said plate (12) and by the manifold modules (15).

9. The heating element according to one or more of the preceding claims, characterized in that it comprises at least one dividing wall (18a), which is formed by the protrusion of a corresponding longitudinal partition (18) outside one of the two borders (22) of said first plate-like portion (16), so as to obstruct the channel formed by the corresponding manifold module (15,115) and by the band (20) of the plate (12, 112).

10. The heating element according to one or more of the preceding claims, characterized in that in said manifold modules (15, 115) there is also the intake hole (26) and the discharge hole (27) for the heat transfer fluid, which can be connected to the duct of the hydraulic heating system, and there is also a vent hole (28) to which the vent valve can be connected.

11. The heating element according to claim 10, characterized in that said intake hole (26) and said discharge hole (27) are arranged on opposite sides of said dividing wall (18a).

12. The heating element according to claim 3, characterized in that said fins (19) are provided with a recess at the corners (30) of the area occupied by said fins (19) so as to provide space for positioning the wall supports (31) for the heating element (10, 100).

Ansprüche

1. Ein Heizelement für Heizkörper, vom modularen Typ, das Folgendes umfasst: mindestens ein Strahlermodul (11, 111), das aus einer Metallplatte (12, 112) besteht, welche zwei einander gegenüberliegende plattenähnliche Teile hat, einen ersten plattenähnlichen Teil (16) und einen zweiten plattenähnlichen Teil (17), die durch längliche Trennwände (18) verbunden sind, welche seitlich eine Vielzahl paralleler Kanäle (13, 113) begrenzen, die an ihren Enden (14, 114) offen und innerhalb der Grundfläche der Metallplatte (12, 112) geformt sind und sich dort entlang erstrecken; und mindestens zwei Verteilermodule (15, 115), die an der Platte (12, 112), an gegenüberliegenden Seiten an den gegenüberliegenden Endöffnungen (14, 114) der Kanäle (13, 113), befestigt sind, wobei die mindestens zwei Verteilermodule, gemeinsam mit den Kanälen (13, 113), einen Pfad für eine Wärmetauschflüssigkeit bilden, wobei das Heizelement (10, 100) wahlweise aus der einzigen Platte (12) oder aus mehreren Platten (112) besteht, die die Strahlermodule (11, 111) bilden, welche an ihren Seitenkanten (129) aneinander befestigt sind, so dass die Kanäle (113) aller Strahlermodule (111) parallel sind, wobei die mindestens zwei Verteilermodule (15, 115) an den gegenüberliegenden Endöffnungen (14, 114) der Kanäle (113) quer zu allen der Kanäle (13, 113) angeordnet sind, dadurch gekennzeichnet, dass der zweite plattenähnliche Abschnitt (17) an den Endöffnungen (14, 114) der Kanäle (13, 113) über die Endöffnungen (14, 114) hinausragt, entsprechende gegenüberliegende Bünde (20) bildend, die jeweils quer zu den Kanälen (13, 113) angeordnet sind, wobei jedes der Verteilermodule (15, 115) von einem einzigen Element gebildet wird, das eine im Wesentlichen L-förmige Kontur hat und mit einer ersten länglichen Endkante (21) desselben auf dem Rand (22) des ersten plattenähnlichen Teils (16) aufliegt, der dem Bereich der Endöffnungen (14, 114) entspricht, und mit seiner zweiten länglichen Endkante (23), die senkrecht zu der ersten länglichen Endkante (21) ist, auf dem zweiten plattenähnlichen Teil (17) aufliegt.

2. Das Heizelement gemäß Anspruch 1, dadurch gekennzeichnet, dass die Platte (12, 112) aus einem einzigen Stück extrudiertem Aluminium besteht.

3. Das Heizelement gemäß Anspruch 2, dadurch gekennzeichnet, dass die Platte (12, 112) eine Reihe von Rippen (19) umfasst, die in rechten Winkeln von dem ersten plattenähnlichen Abschnitt (16) nach außen ragen, wobei die Rippen parallel zur Erstreckung der Kanäle (13, 113) und monolithisch mit der Platte (12, 112) geformt sind.

4. Das Heizelement gemäß Anspruch 3, dadurch gekennzeichnet, dass die Kanäle (13, 113) eine abgeflachte rechteckige Form haben.

5. Das Heizelement gemäß einem beliebigen der Ansprüche 1-4, dadurch gekennzeichnet, dass die zweite längliche Endkante (23) jedes der Verteilermodule (15, 115) breiter ist, um gut an dem zweiten plattenähnlichen Abschnitt (17) aufzuliegen, um mit der Endkante (24) des zweiten plattenähnlichen Abschnitts (17) zu fluchten, wobei an jedem der Verteilermodule (15, 115), an der ersten länglichen Endkante (21), eine abgeschrägte Kante (25) geformt ist, um das Verschweißen des Bereichs des Verteilermoduls (15, 115) mit der Platte (12, 112) zu erleichtern.

6. Das Heizelement gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass die Verteilermodule (15) wie das mindestens eine Strahlermodul (11, 111) ebenfalls aus extrudiertem Aluminium bestehen und an dem mindestens einen Strahlermodul (11, 111) durch Schweißen befestigt sind.

7. Das Heizelement gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass die länglichen Trennwände (18), die die Kanäle (13, 113) seitlich begrenzen, mit Bezug auf den Rand (22) des ersten plattenähnlichen Abschnitts (16), der dem Bereich der Endöffnungen (14, 114) entspricht, außen herausragen.

8. Das Heizelement gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass die länglichen Trennwände (18), die den Seitenwänden der Platte (12) entsprechen, bis zur Endkante (24) des zweiten plattenähnlichen Abschnitts (17) reichen, um so den Raum, der von der Platte (12) und von den Verteilermodulen (15) begrenzt wird, seitlich zu verschließen.

9. Das Heizelement gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass es mindestens eine Trennwand (18a) umfasst, die durch den Vorsprung einer entsprechenden länglichen Trennwand (18) außerhalb eines der beiden Ränder (22) des ersten plattenähnlichen Abschnitts (16) geformt ist, um so den Kanal zu blockieren, der durch das entsprechende Verteilermodul (15, 115) und durch den Bund (20) der Platte (12, 112) gebildet wird.

10. Das Heizelement gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass sich in den Verteilermodulen (15, 115) auch die Einlassöffnung (26) und die Ablassöffnung (27) für die Wärmetauschflüssigkeit befinden, welche mit der Leitung des hydraulischen Heizsystems verbunden werden können, und dass auch ein Entlüftungsloch (28) vorhanden ist, mit dem das Entlüftungsventil verbunden werden kann.

11. Das Heizelement gemäß Anspruch 10, dadurch gekennzeichnet, dass die Einlassöffnung (26) und die Ablassöffnung (27) auf gegenüberliegenden Seiten der Trennwand (18a) angeordnet sind.

12. Das Heizelement gemäß Anspruch 3, dadurch gekennzeichnet, dass die Rippen (19) an den Ecken (30) des Bereichs, der von den Rippen (19) eingenommen wird, mit einer Vertiefung versehen sind, um Raum für die Positionierung der Wandstützen (31) für das Heizelement (10, 100) zu schaffen.

Revendications

1. Elément chauffant pour des dispositifs de chauffage, du type modulaire, comportant : au moins un module radiant (11, 111), qui est formé par une plaque métallique (12, 112) qui a deux parties analogues à des plaques opposées, respectivement une première partie analogue à une plaque (16) et une seconde partie analogue à une plaque (17), qui sont reliées par des séparations longitudinales (18) qui délimitent latéralement une pluralité de conduits parallèles (13, 113) qui sont ouverts à leurs extrémités (14, 114) et sont formés à l'intérieur de la dimension plane de ladite plaque métallique (12, 112) et s'étendent le long de celle-ci, et au moins deux modules collecteurs (15, 115), qui sont fixés à ladite plaque (12, 112) respectivement sur des côtés opposés au niveau des ouvertures d'extrémité opposées (14, 114) desdits conduits (13, 113), lesdits au moins deux modules collecteurs, en association avec lesdits conduits (13, 113), formant un trajet pour un liquide de transfert de chaleur, ledit élément chauffant (10, 100) étant sélectivement composé d'une unique dite plaque (12) ou de plusieurs plaques (112) formant les modules radiants (11, 111) qui sont mutuellement fixés au niveau de leurs bords latéraux (129) de sorte que lesdits conduits (113) de tous les modules radiants (111) sont parallèles, lesdits au moins deux modules collecteurs (15, 115) étant agencés transversalement à la totalité desdits conduits (13, 113) au niveau des ouvertures d'extrémité opposées (14, 114) desdits conduits (113), caractérisé en ce que ladite seconde partie analogue à une plaque (17), au niveau desdites ouvertures d'extrémité (14, 114) desdits conduits (13, 113), fait saillie au-delà desdites ouvertures d'extrémité (14, 114), formant des bandes opposées respectives (20), dont chacune est orientée transversalement auxdits conduits (13, 113), chacun desdits modules collecteurs (15, 115) étant formé par un unique élément qui a un contour sensiblement en forme de L et repose, avec un premier bord d'extrémité longitudinal (21) de celui-ci, sur la bordure (22) de ladite première partie analogue à une plaque (16), qui correspond à la région desdites extrémités (14, 114), et repose, avec son second bord d'extrémité longitudinal (23), qui est perpendiculaire audit premier bord d'extrémité longitudinal (21), contre ladite seconde partie analogue à une plaque (17).

2. Elément chauffant selon la revendication 1, caractérisé en ce que ladite plaque (12, 112) est formée par une unique pièce en aluminium extrudé.

3. Elément chauffant selon la revendication 2, caractérisé en ce que ladite plaque (12, 112) comporte une série d'ailettes (19) faisant saillie à angles droits vers l'extérieur à partir de ladite première partie analogue à une plaque (16), lesdites ailettes étant parallèles à l'extension desdits conduits (13, 113), et étant formées d'un seul tenant avec ladite plaque (12, 112).

4. Elément chauffant selon la revendication 3, caractérisé en ce que lesdits conduits (13, 113) ont un contour rectangulaire aplati.

5. Elément chauffant selon l'une quelconque des revendications 1 à 4, caractérisé en ce que ledit second bord d'extrémité longitudinal (23) de chacun desdits modules collecteurs (15, 115) est plus large de manière à bien reposer contre ladite seconde partie analogue à une plaque (17), de manière à être aligné avec le bord d'extrémité (24) de ladite seconde partie analogue à une plaque (17), un biseau (25) étant formé sur chacun desdits modules collecteurs (15, 115) sur ledit premier bord d'extrémité longitudinal (21), afin de faciliter le soudage de ladite région du module collecteur (15, 115) à ladite plaque (12, 112).

6. Elément chauffant selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdits modules collecteurs (15) sont également fabriqués en aluminium extrudé comme ledit au moins un module radiant (11, 111) et sont fixés audit au moins un module radiant (11, 111) par soudage.

7. Elément chauffant selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdites séparations longitudinales (18) qui délimitent latéralement lesdits conduits (13, 113) font saillie extérieurement par rapport à ladite bordure (22) de ladite première partie analogue à une plaque (16) qui correspond à la région desdites ouvertures d'extrémité (14, 114).

8. Elément chauffant selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdites séparations longitudinales (18) qui correspondent aux parois latérales de la plaque (12) atteignent le bord d'extrémité (24) de la seconde partie analogue à une plaque (17), de manière à fermer latéralement l'espace délimité par ladite plaque (12) et par les modules collecteurs (15).

9. Elément chauffant selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comporte au moins une paroi de séparation (18a), qui est formée par la saillie d'une séparation longitudinale (18) correspondante à l'extérieur de l'une des deux bordures (22) de ladite première partie analogue à une plaque (16), de manière à entraver le canal formé par le module collecteur (15, 115) correspondant et par la bande (20) de la plaque (12, 112).

10. Elément chauffant selon une ou plusieurs des revendications précédentes, caractérisé en ce que dans lesdits modules collecteurs (15, 115), il existe également un trou d'admission (26) et un trou de refoulement (27) pour le fluide de transfert de chaleur, qui peuvent être raccordés à la conduite du système de chauffage hydraulique, et il existe également un trou d'évent (28) auquel la soupape d'évent peut être raccordée.

11. Elément chauffant selon la revendication 10, caractérisé en ce que ledit trou d'admission (26) et ledit trou de refoulement (27) sont agencés sur des côtés opposés de ladite paroi de séparation (18a).

12. Elément chauffant selon la revendication 3, caractérisé en ce que lesdites ailettes (19) sont munies d'un évidement au niveau des coins (30) de la zone occupée par lesdites ailettes (19) de manière à fournir un espace pour positionner les supports muraux (31) pour l'élément chauffant (10, 100).

Drawing