EP0763181A1 - Heating device - Google Patents

Abstract

The invention concerns a heating device with a first heating element (100) and a covering (10); the first heating element (100) comprises (preferably vertical) collecting tubes (150), and, connected thereto, (preferably horizontal) heating tubes (152). The heating device is also provided with a forward flow duct and return flow duct (114 and 116 respectively), and according to the invention the covering (12) is of such an extent that the region between the collector pipes across the width of the latter is substantially covered, while the region along the principal length is partially exposed to cover at least partially the forward flow and return flow ducts.

Description

 description

Heater

The invention relates to a heating device with a cladding according to the preamble of claim 1.

In the prior art, heating devices, hereinafter referred to as heating elements or bathroom heating elements, have become known which have two vertically oriented collecting pipes and a large number of horizontally oriented heating pipes connected to these collecting pipes in terms of flow technology.

Such Heizköφer are used for aesthetic reasons, especially in bathrooms as Badheizköφer, because such Heizköφer have not only heating technology, but also aesthetically undoubtedly advantages that conventional Heizköφer at least not have to show.

However, the aforementioned radiators or bathroom radiators have the disadvantage, inter alia, from an aesthetic point of view that the connection area and, if appropriate, the control area in these radiators are freely accessible to the viewer. The otherwise very advantageous appearance of such a radiator is permanently clouded by the connection fittings and any electrical heating devices, such as an electrical resistance heating element, together with the control, inlet valves, etc., which are often arranged at the lower end region of the said radiator.

In addition, temperature sensors, temperature display instruments, etc. are unclad and unprotected, and are often arranged at the lower end of such a heating element as described above and can easily be damaged, for example when cleaning.

Furthermore, radiators are known which are arranged one behind the other in the form of one or more heating plates, such radiators generally using connecting elements are welded to one another by pressing the radiators together at a high pressure and melting the material by the flow of high electrical currents in the connection areas in order to form an intimate connection.

With a reasonable yield, however, such manufacturing processes can only be justified in the case of plate heaters with several heating plates if they have relatively small dimensions, so that manufacturing tolerances are still acceptable.

Radiators are currently often hidden in window niches, etc., since radiators are usually still unsightly on the outside.

In certain areas, for example in the bathroom, radiators are increasingly becoming aesthetically appealing design elements. Here they are also used as textile dryers, for example towel dryers, which are accordingly designed with one or more throw-through possibilities. Such radiators have the disadvantage, however, that aesthetically designed radiators have a relatively small radiation area for a sufficient heat output for a room of a given dimension. For this reason, corresponding heating elements, for example bathroom heating elements, must have large external dimensions in order to provide sufficient heat output, or they must be supported by additional heating options, for example underfloor heating.

It is a preferred object of the present invention to propose a heating device with a covering or to propose a covering for a heating device which also eliminates the disadvantages of the prior art listed above. In particular, a heating device with a cladding or a cladding for a heating device should be proposed, which protects the lower region of a radiator or bathroom radiator both from the view of an observer and from mechanical influences. This object is achieved by a heating device with the features listed in claim 1.

Advantageous refinements of the device or cladding according to the invention emerge from the respective subclaims.

The invention can also be directed to the problem of proposing a radiator arrangement which remedies the disadvantages of the prior art and, in particular, is intended to provide a heating device which is aesthetically pleasing and has sufficient heating output in the smallest possible space provides.

The device according to the invention makes it possible, for example, to hide and at the same time protect unattractive connection fittings, valve devices, electrical connections for heating elements, etc., which on the one hand enables greater operational reliability and on the other hand a much improved overall appearance for a corresponding heating element. In addition, the likelihood of injuring sharp-edged profiles in the connection area of a radiator is greatly reduced. Accordingly, it is particularly expedient to provide the cladding on the connection section of the heating device, in particular on the lower end section of the heating body or the heating device.

The cladding advantageously has an upper cover surface which has the same extension in the direction of the broad side of the header tubes as the front surface. This not only prevents an insight from above, but also prevents, for example, dust, etc. from penetrating and lying on a resistance heating element or its electrical connections that may be present, which can lead to considerable sources of danger, particularly in bathrooms, since in These rooms often also contain easily combustible fabric components, for example cotton thread or the like. In addition, the cladding can be provided with side surfaces which are arranged on the narrow sides of the front surfaces and which are preferably angled at an angle to the front surface, so that the side surfaces conform to the contour of the collecting tube or the collecting tubes in the depth of the Heater connects or adjusts. This also prevents a side view of the area to be shielded from the heating device according to the invention.

The cover surface or the side surface or side surfaces can have recesses, openings or the like, in particular in order to guide the collecting tubes through them. In this way it is possible to enclose the area of the radiator to be clad so extensively and to isolate it from the environment that there are no gaps or spaces or the like from all the usual viewing directions. Since this configuration gives a particularly compact impression, the aesthetic value of the radiator together with the cladding in this form can be assessed as particularly outstanding. In addition, the danger that people who are in the area of the heating element or bathroom heating element designed in this way is injured is considerably reduced, since all angular parts of a heating element are covered and gaps etc. can form a source of danger, can be largely avoided with the cladding formed in this way.

The advantages to be achieved according to the present invention can also be based on the fact that a tubular heating element with horizontal and / or vertical heating tubes and corresponding vertical or horizontal or horizontal collecting tubes with a tubular heating element or a flat heating element are combined. In this case, due to manufacturing tolerances, angular deviations of 3 to 6 ° occur between the radiators arranged in parallel, which cannot be managed with an acceptable result using conventional manufacturing methods.

While flat radiators can be produced by deforming metal sheets, tubular radiators can be produced by welding or soldering pipes together. Flat radiators and plan radiators are transported via roller port routes transported from one manufacturing station to the next manufacturing station and the welding machines used to connect the preformed sheets set at least ten welding spots per square decimeter of the radiator surface, which are not infrequently leaky.

Because of the fact that tubular heaters are not suitable for transport through the roller conveyor sections that are used for flat heaters, it is almost impossible to manufacture different types of heaters using the same manufacturing methods and manufacturing machines.

In addition, the automatic welding machines that are used for the production of the weld seams of the flat radiators or plate radiators are not suitable for tubular radiators, since it is hardly possible to produce a closed 360 ° covering weld seam when welding tubes, which also aesthetic considerations are sufficient.

Heating devices with two radiators arranged one behind the other can be implemented particularly advantageously if they have an essentially continuous cladding between them. The covering can cover the entire rear radiator or selected sections of the rear radiator. Alternatively or additionally, the cladding can clad connecting fittings, thermostatic valve, etc. and similar components, which are provided at the lower end of the heating device according to the invention and via which a connection to a central heating system can be made. The cladding can have ornaments, recesses and projections in order to leave a visually harmonious impression and / or to offer a specific heat radiation characteristic. If a part of the cladding is mentioned below or as an example, the technical features listed in this connection are to be seen as extremely advantageous, also in connection with the cladding discussed above.

Here it is therefore necessary to use a soldering process for tubular heaters. A soldering process that works with copper solder has proven particularly useful, since copper pulls into all connection points due to its high capillary pressure and provides an ideal connection both in terms of stability and tightness as well as in terms of the practicability of the production process.

Because of the different manufacturing processes, even greater manufacturing tolerances result in flat radiators and tubular radiators, which can only be overcome by means of suitable connection techniques between the individual radiators of the radiator arrangement.

On the other hand, the later connection of separately manufactured radiators to the present radiator arrangement according to the invention results in the advantage that the radiators of the arrangement can be colored differently. While in the prior art radiators, which are welded to one another, for example, could only be designed in one piece as an arrangement in one piece, according to the invention each of the radiators of the arrangement can be colored individually, the radiators later having to be connected to one another.

Here, connecting elements are advantageously required that have a construction that accommodates manufacturing tolerances.

Such connecting elements for the heating device according to the invention have a first and a second connection area, each of which can be fixed in one of the heating elements of the arrangement. The relevant connection areas can each be screwed in, fixed via sleeves or fastened in some other way.

In the simplest case, the connection area can have an at least partially flat first plane surface running perpendicular to the axis of the first and / or second connection area. The second connection area has a corresponding second flat surface, a sealing element, for example an O-ring, between the flat surfaces. can be arranged. In order to be able to compensate for the manufacturing tolerances, one of the two flat surfaces advantageously has smaller dimensions or a smaller diameter than the other flat surface. As a result, the two flat surfaces and thus the two connection areas can be mounted in a manner different from a coaxial arrangement of the two connection areas.

In addition, the O-ring can accommodate further tolerances by being pressed differently.

This degree of freedom for accommodating manufacturing tolerances can advantageously be created by the fact that the connecting element connecting the two flat surfaces and thus the connection areas also has different internal dimensions or a different inner diameter than at least one of the flat surfaces. As a result, at least one of the connection areas can be misaligned within the limits specified by the connecting element, as a result of which additional tolerances can be absorbed.

Additional degrees of freedom can be achieved in that the diameter or the dimensions of the flange area of at least one of the two connection areas, which are assigned to the plane surfaces, change in the axial direction.

In order to be able to hold the sealing element in a predetermined position and to prevent the sealing element from being squeezed too much, a groove can advantageously be arranged in the flat surface, which partially accommodates the sealing element.

In order to be able to connect the connection areas tightly to the respective heating elements of the heating element arrangement, sealing devices can also be arranged on the respective outer diameters or outer sections of the connection areas, which sealing seals are pressed, for example, when the connection areas are inserted or screwed into the respectively assigned heating elements. For example, O-rings can be viewed as an advantageous sealant. If the connecting element described above is used in one of its embodiments, the respective heating elements of the heating element arrangement according to the invention are provided on the one hand on their front view and on the other side facing this front view with bores or openings into which the connection elements elements or their connection areas are used. The connection elements mentioned are stressed both fluidically and mechanically as connection elements. Accordingly, the connecting element described also has a supply or return line. In order to be able to guarantee sufficient mechanical stability of the radiator arrangement according to the invention, it is preferred if four of the connecting elements described are mounted on the corner regions of the respective radiators of the radiator arrangement according to the invention. However, two, three or more than four of the connecting elements described or the connecting elements described below or different connecting elements described here can also be used in a corresponding manner.

In order to reduce the risk that the often much higher temperatures in the vicinity of the connection fittings of a radiator can lead to the panel according to the invention heating up excessively, the panel according to the invention is advantageously made of a non-conductive or poorly conductive material, preferably plastic.

Advantageously, the cladding extends beyond the extent of the heating device or the band heater body and / or forms a receiving space for heating and / or control devices, for example a thermostatically controlled resistance heating element, an automatic mixing and control heating device which issues an electric heating device or regulates its output , as soon as a sufficiently hot heat transfer medium is supplied via a central heating system.

Advantageously, in the heating device according to the invention or behind the cladding, a control device can be concealed, which has at least one temperature measuring device and at least one regulating device for controlling an energy flow, in particular an electric current, which cannot be converted into heating power, with an electric heater. preferably an electric heating element or an electric heating cartridge, wherein at least one throttle device for controlling or stopping the flow of the heating medium can be arranged in the inflow and / or outflow of the heating device. The circuit can open, throttle or interrupt the supply and / or return of the heating medium from or to a central heating system by means of the throttle device as a function of a preset target or target room temperature for the heating device and as a function of the temperature of the heating medium, the desired or target room temperature should preferably be felt at the inlet of the heating device and the inlet and / or return of the heating medium can be controlled by means of the throttle device to and from the central heating system when the inlet ¬ temperature falls below a predetermined temperature value.

This configuration makes it possible to ensure a mixed central heating and heating cartridge operation for a heating device according to the invention in transitional periods.

This configuration also makes it possible to partially or completely shut off the heating device according to the invention from the central heating system. The heating device according to the invention to be temperature-controlled can then be heated solely by the heating cartridge located in the heating device and the risk of heating neighboring rooms via connected lines and remote heating elements is eliminated. Unnecessary energy losses are also avoided. The correct operating mode can be selected automatically, providing additional security. This is particularly important if the cladding is made from a possibly combustible plastic which warps or even catches fire if temperatures are too high, for example if a heating element is not or poorly controlled.

A room temperature sensing device can also be arranged in the heating device according to the invention in order to supply the control device with information about the actual room temperature. The cladding according to the invention can have recesses or recesses in which operating elements, for example an input device or keyboard, are arranged around some or all of the control parameters, limit values or the like, in particular the target temperature of the room, a time at which heating operation is to be started to enter.

As already stated, it is advantageous for the aesthetic impression if the control device is arranged behind the cladding according to the invention, since this eliminates the need for separate installation in a wall box or the like. This also advantageously satisfies the safety aspect.

Insofar as a timer device is also arranged under the cladding according to the invention, it is possible to pre-program heating periods, times for the start or end of a heating period, ramps and the like.

In the cladding, for example, a battery and / or a mains connection to a power supply, a rechargeable battery or the like can also be hidden well from the view of a viewer and from the access of unauthorized persons, for example children. In addition, the use of a battery or a rechargeable battery makes it possible to dispense with a direct power connection, as a result of which cables which are not aesthetically advantageous can be omitted.

In addition, LED warning lights or LCD displays or the like can be arranged in the cladding, which can provide information about the current state of the battery. Operating status displays are also conceivable, such as "heating operation on" or "fault". In the event that a mains connection is additionally provided, the monitoring circuit can temporarily connect an existing rechargeable battery to the mains for charging.

In addition, it is possible, owing to the cladding designed according to the invention, to provide a pressure compensation tank without the optics of a corresponding radiator or bathroom radiator being thereby defaced. Such a pressure expansion tank is required above all if the radiator during the additional electrical operation is completely disconnected from the heating network or even operated completely independently. The expansion tank then offers the expansion space required for heating the filling fluid. The gain in safety is very considerable here, since the pressure-compensating container, which may be under an increased pressure, can additionally be protected from mechanical interference from the outside by the casing according to the invention.

In order to be able to better withstand increased mechanical loads, the cladding according to the invention can also be reinforced with reinforcing ribs made of the same material from which the cladding according to the invention is essentially manufactured. for example plastic. On the other hand, reinforcements made of other materials can also be included in the cladding according to the innovation.

It can also be beneficial. Arrange ventilation slots or the like in the panel according to the invention, for example in the cover.

The innovation is explained in more detail below on the basis of preferred embodiments with reference to the attached figures. Show it:

1 shows a heating device or a Badheizköφer with a panel;

2 shows a preferred embodiment of a panel according to the invention in a perspective front view;

3 shows a further preferred embodiment of the cladding according to the invention in a perspective front view;

Fig. 4 is a schematic representation of a heating device according to the innovation

Components that can be arranged behind a panel according to the invention; 5 shows a schematic exploded illustration of a particular embodiment of the invention;

6 shows a perspective view of a further particular embodiment;

FIG. 7 shows the embodiment according to FIG. 5;

8 shows an example of a tubular heating element in a rear view as it can be used in a heating element arrangement according to the invention;

9 shows a flat heating element as it can be mounted in a heating element arrangement according to the invention, in a front view;

Fig. 10 shows a connecting element in a partial longitudinal section or a partial

Side view;

Fig. 11 shows a connecting element in a partial side view and a partial

Longitudinal section;

12 shows a further embodiment of a connecting element for the connection of a heating body arrangement or the connection of a heating body arrangement according to the present invention in a partial longitudinal section or a partial side view;

Fig. 13 shows an embodiment of a connecting element with a gimbal

Sealing element in a longitudinal section and views of the sealing element;

14 shows a further embodiment of a connecting element with a tolerance receiving radius in a longitudinal section; and 15 shows another embodiment of a connecting element with a plug connection technology in a longitudinal section.

FIG. 1 shows a heating element, in particular bathroom heating element 100, which is designed as a tubular heating element.

This has a lining 10 according to the invention, which is partially cut out. and reveals the fittings etc. hidden behind it.

A front surface 12 with or without a valve or thermostatic head opening 26 extends between sections 22, which are adjoined by lateral surfaces 16 which at least partially surround the radiator 100. The lateral surfaces 16 can grip around the radiator directly or additionally have fastening devices, for example in the form of clips. The covering 10 can also be fastened by means of screws, by gluing or in some other way.

A panel 10 according to the invention can be seen in FIG. 2, which has a front surface 12 and a cover surface 14. Lateral surfaces or side surfaces 16 are provided at the ends of the front surface 12 in its main direction of extension.

The cover surface 14 has recesses 18 through which either the manifolds of a heating device or a Heizköφers could be passed directly or their connecting armature extensions.

Depending on the type of radiator, these recesses 18 could be provided both in the cover surface and in the side surfaces 16.

As can be seen, the front surface 12 merges into the side surfaces 16 in a slightly curved manner. Of course, an abrupt transition in the form of an angle can also be provided here. A section-wise transition or other aesthetic or mechanically stabilizing modifications are also possible here. On the back of the front surface 12, Strengthening ribs may be provided. In addition, recesses can also be provided on the front surface 12, for example to arrange control panels, such as keyboards, or displays, for example LED displays or the like, or to arrange a manually operable valve or thermostatic valve so that it can be accessed from the front. Openings with transmission or reception diodes of an infrared control path, for example, are also possible, via which signals for actuating the valve, safety devices or the like are transmitted.

The front surface 12 changes abruptly into the cover surface at an angle of approximately 90 °. Of course, roundings or the like can also be provided here.

A material with poor thermal conductivity, for example plastic, is recommended as the material for the covering 10. If possible, the plastic should be able to be dyed with sufficient ease or it should be possible to color it into a basic plastic material.

3 shows a preferred embodiment of a cladding 10 'according to the invention. In this figure, parts that match or at least have the same function as the parts shown in FIG. 2 are identified by the same reference numerals.

The reference numeral 20 indicates on the one hand the possibility of providing reinforcing ribs as decorations which are also visible from the outside, and on the other hand the possibility. Arrange ventilation slots to achieve additional convection effects. Correspondingly, slots and / or reinforcements 20 can of course also be provided in the cover 14.

In the embodiment 10 ', the front surface 12 merges in sections into the side surfaces 16. First, the front surface 12 bulges out over the section 24, in order to then indent a slightly beveled or slightly rounded section 22. The contour resulting from sections 24, 22, 16 can correspond to the outer contour of a header. Such a manifold, which could fit this contour, can be seen from FIG. 4 or from FIG. 1 and has the reference numeral 150 in FIG. 4. This collection Tubes can be placed directly on the surface of the cover surface 14, which results in a continuous transition between the cladding according to the invention and the radiator or by means of which the radiator according to the invention with its cladding presents itself as an aesthetic unit. The outer shape of the cover 14 or the front surface 12 can also be adapted to the corresponding dimensions and / or shapes of the assigned heating element, for example the heating element according to FIG. 4 or according to FIG. 1, which has curved heating tubes 152, could continue with its shape bent into the room in the corresponding contour or cross-section of the cladding 10 or 10 '.

FIG. 4 shows the partly schematic, partly perspective view of a heating element according to the innovation with the devices that are at least largely hidden behind a covering according to the invention.

If the dimensions of the cladding 10, 10 'are based on the orientation of the bathroom heater 100, "broadside" of the header pipes 150 means the short dimension of the surface 150a visible from the top view of the bathroom heater body perpendicular to the longitudinal direction of the header pipes 150, and "depth" of the heating device or manifold denotes the direction of dimension in the short direction of extent of the surface 150b of the manifold 150, which is oriented approximately perpendicular to the surface 150a. These details serve only as an orientation and not as a restriction to a specific type of radiator. Bathroom radiators etc. with collecting tubes 150 with a round, semicircular, trapezoidal or similar cross section can also be used.

The Badheizköφer 100 has trapezoidal manifolds 150 through which a heat transfer medium can flow. The manifolds 150 are connected to one another via heating tubes 152.

The components described below can be hidden behind the cladding according to the innovation, only the central heating system 112 of course not being affected by this finding. A feed line 114 and an outlet 116 to the central heating system 112 can very well be hidden behind a cladding 10, 10 ′ according to the invention.

A valve 18 can either, if it is a simple valve or thermostatic valve, protrude through a recess in the casing, or, if it is an automatic valve, it can also be hidden behind the casing.

Accordingly, many of the operating units and / or control units described below, as already indicated above, can also be accessed via recesses in the cladding.

A valve can also be arranged in the outlet or return 116 of the bathroom heating element 110, which valve can be designed only as a shut-off valve, but also as a metering valve. It should only be ensured that either one of the valves allows pressure equalization in order to prevent that if the Badheizköφer 110 is heated separately by a heating cartridge or a heating element 124, this bursts through the expanding heating medium. However, an expansion tank can also be accommodated, which absorbs excess liquid if necessary.

The resistance heater or the heating cartridge 124 is accommodated in the bathroom heating element 110, which can be associated with a safety thermal switch 126, which acts directly on the power supply of the heating element 124, or the function of the heating element via control electronics or control electronics 132 Heating element or the heating cartridge 124 influenced. An additional sensor 12 in the feed line 14 can forward information about the flow temperature of the heating medium to the electronics or electrics 132 in order to provide a value or values by means of which it can be decided whether the feed 114 and / or the return 116 should be opened, throttled or closed via the metering valve 118 and / or the valve or metering valve 120, again preferably at least a minimum pressure equalization opening should remain in order to avoid damage to the heating element when it is heated separately by the heating cartridge 124 . A room temperature sensor 128, which can also be arranged behind the cladding 10, 10 ', forwards measured values about the room temperature to the control electronics or control electronics 132. All electrical or electronic components are connected to one another via control or supply lines 130, which are shown only by way of example in the single figure, and can be hidden behind the cladding.

A timer device, e.g. a programmable timer 134 can be connected, which transmits time-related control commands tailored to the wishes of the user to the control electronics or electronics 132 in order to cause the control device or control arrangement to start operating.

In addition, an input device 136, a comparison device 138 and a storage device 140 can be provided. The input device enables the user to enter commands into the electronics or electrics 132 or, at the same time, into the timer device 134, for example via function or input buttons, which can be accessible through recesses in the cladding. The setpoint temperatures can be compared with the current temperatures by means of the comparison device 38, in order to throttle or increase the flow of the heating medium or to restrict or increase the current supply to the heating cartridge or the heating element 124, if necessary, based on the difference.

The storage device 140 can store the entered information in order to make it available to the control electronics when necessary.

FIG. 5 shows a particularly advantageous embodiment according to the present invention, which comprises an arrangement of a rear heating element 20 and a front heating element 10 with a covering 12 provided in between. The heating element 10 according to FIG. 5 is designed in the same way as the heating device 10 according to FIG. 8 or according to FIG. 1. On the radiator 20 there are connection connections 100 which can serve as a mechanical support device and can also provide a fluidic connection of the rear radiator 20 to the front radiator 10. The connections 100 are also structured in such a way that they are also able to carry the cladding 12, the connections 100 accessing the front heating element 10 through recesses in the cladding 12. The cladding 12 has a main plane 12b, the dimensions of which essentially correspond to the dimensions of the rear heating element 20. A projection 12a is formed at the lower end of the covering 12. This lower part or overhang 12a is used to cover connection fittings, valves, thermostats, etc., in particular on the lower part of the heating device. The hole provided on the lower extension 12a illustrates where a valve or thermostatic valve for operating it looks out of the heating device according to the invention. Lateral extensions 12c provided on the cladding 12 serve, for example, to continue the outer, in particular peripheral shape of the header tubes 13 (see FIG. 8) of the front radiator 10, in order to give a particularly advantageous aesthetic impression.

FIG. 6 shows a further embodiment, in which the lining 12 does not completely cover the rear heating body 20, but instead allows vertical tubes of the rear heating body to remain visible. To fasten the cladding 12, clips can be provided on the cladding 12 which encompass at least some of the vertical tubes of the rear heating element 20 (see also FIG. 5). This embodiment of a cladding 12 has a lower extension 12a and an upper extension 12d, which can be used on the one hand for covering the holder device or fittings and the like, but at the same time can also help to improve the external aesthetic impression of the heating device according to the invention.

The illustration according to FIG. 7 shows the heating device according to FIG. 5 in the assembled state. The flowing transition between the respective trapezoidal collecting tubes and the outer regions 12c (see FIG. 5) of the cladding 12 can be clearly seen here. At the upper end, the panel 12 has a slight but noticeable Overhang 12d so that the cover 12 practically acts like a frame for the front radiator 10 in plan view, which is particularly advantageous when the front radiator 10 and the cover 12 have different colors, which is particularly advantageous here It is possible in this way since the individual parts can be joined together later to form a complete heating device according to the invention, so that the individual parts 10, 12 and optionally 20 can each be provided with different colors, for example by powder coating.

The heating device shown in FIGS. 8 to 15 is an advantageous embodiment A with a first heating body (12) with a front view or front surface, with the following features: a second heating body (20) with a front view or Front surface, the first and second Heizköφer (10, 20) are arranged one behind the other with essentially parallel front views; and the first and the second heating body (10, 20) are fluidly and / or mechanically connected via at least two connecting elements (100, 200, 300, 400).

Further very advantageous embodiments B to AN are described below.

An embodiment B according to embodiment A results when the first or rear heating element (10) is a flat heating element and / or tubular heating element.

An embodiment C results when the second or front heating body (20) is a flat heating body and / or a tubular heating body.

An embodiment D according to one of the embodiments A to C results if the connecting element (100, 200, 300, 400) has a construction which takes up manufacturing tolerances.

An embodiment E according to one of the embodiments A to D results, the connecting element (100, 200, 300, 400) having a first and a second connection area (102, 104; 202, 204; 302, 304; 402, 404), each of which can be fixed in one of the heating elements (10, 20).

An embodiment F according to embodiment E is obtained, the first connection area (102, 202, 302, 402) having at least one extending perpendicular to the axis of the first and / or second connection area (104, 204, 304, 404) has partially flat first flat surfaces (122) and the second connection area (104) has a corresponding second flat surface (128), at least one sealing element, for example an O-ring (124), being arranged between the flat surfaces.

An embodiment G according to embodiment F results, one of the two flat surfaces (122, 128) having smaller dimensions or a smaller diameter than the other.

An embodiment H according to one of the embodiments F and / or G results, the connecting element (108) connecting the two flat surfaces (122, 128) having different inner dimensions or a different inner diameter than at least one of the flat surfaces (122).

An embodiment I according to one of the embodiments E to H results, the diameter or the dimensions of a flange area of at least one of the two connection areas (102) changing in the axial direction on the outer circumference thereof.

An embodiment J according to one of the embodiments E to I results, wherein at least one of the two flat surfaces (128) has a groove in which the sealing element (124) is at least partially received.

An embodiment K according to one of the embodiments E to J results, the connection regions (102, 104; 202, 204; 303, 304; 402, 404) having sealing devices (132) on their outer sections. An embodiment L according to embodiment E is obtained, the first and second connection areas (202, 204) running axially parallel, the connection areas (202, 204) being connected to one another by a connecting line (238), the connecting line (238 ) has continuous receptacles (240) at their respective ends, into which the connection areas (202, 204) can be inserted.

An embodiment M according to embodiment L results, the connection areas (202, 204) each having at least one sealing element (242a) or an O-ring, which is operatively connected to at least one opening of the continuous receptacle (240) is feasible.

An embodiment N according to one of the embodiments L or M results, wherein at least one opening of the continuous receptacle (240) of the connecting line (238) is provided with a sealing element (244a) which has a corresponding section on the respective first or second connection area ( 202, 204) can be brought into operative connection.

An embodiment O according to one of the embodiments L to N results, wherein a sealing element (242a, 244a) is provided on the connection area (202, 204) and one on one of the openings of the receptacle (240).

An embodiment P according to one of the embodiments L to O results, the respective connection areas (202, 204) having at least one axial and at least one radial connection opening (203, 236).

An embodiment Q according to embodiment E results, the first connection region (304) having a larger diameter or larger dimensions than the second connection region (302), so that the second connection region (302) axially at least partially into the first connection region (304) can be used or vice versa, wherein either the first and / or the second connection area (302, 304) on its outer and / or Inner surface are each provided with at least one circumferential sealing element (324) which extends axially to the connection regions (302, 304).

An embodiment R according to embodiment Q results, the connection areas (302, 304) being connectable to one another via a connecting device, for example a union nut (308).

An embodiment S according to one of the embodiments Q or R results, the inner and / or the outer connection region (302, 304) having a structure, for example grooves or ridges, which fix the sealing element axially or translationally and / or with the sealing element (324) in a sealing operative connection.

An embodiment T according to one of the embodiments Q to S results, the sealing element (324) having different dimensions in the axial direction and / or radial direction.

An embodiment U according to one of the embodiments Q to T results, wherein the sealing element has an oval or elliptical shape in cross section in the axial direction, which changes into a round or circular shape, which preferably changes to the first oval or elliptical shape Staggered shape, especially oval or elliptical shape.

An embodiment V according to embodiment U results, the sealing element being designed in cross-section over the axial direction in such a way that the focal points are distributed on a first axis of the ellipse around the center of the ellipse, the focal points on the ellipse axis approach one another in axial displacement, unite in the center (circle) and the focal points then move away from the center point on the ellipse axis offset by 90 °.

An embodiment W according to embodiment Q results, the first and / or the second connection region tapering or widening in their respective connection direction, one of the connection regions being connected to a connecting device, for example as a union nut (308), which at least partially surrounds the sealing element (324) at least in the closed state.

An embodiment X according to embodiment V results, with the sealing element tapering more conically in its front region (324a).

An embodiment Y according to embodiment W results, the connection area not carrying the sealing element (324) in each case having a structure (348) which essentially corresponds to the more conical area (324a) of the sealing element (324) or is complementary thereto.

An embodiment Z according to one of the embodiments W to Y results, the conical connection region (302) which carries the sealing element (324) having a structure, for example with a circumferential corrugation, corrugation or the like.

An embodiment AB according to one of the embodiments E to Z results, wherein the sealing element or the sealing elements consist of a soft, flexible material, in particular rubber. Latex or the like.

An embodiment AC according to embodiment E is obtained, the first connection region (502) and the second connection region (504) being formed on their radially outer sealing connection surfaces (564) at least according to a radius, the starting point of which is on the cylinder axis of both Connection areas (502, 504) lies on the vertical plane, the starting point of the radius running around a circular path lying in the parallel plane of the mutually facing ends of the connection areas with a predetermined diameter.

An embodiment AD according to one of the embodiments Q to AC results, wherein one flange (562) of one connection area (502) has smaller dimensions, in particular outer dimensions, than the other flange (556) of the other connection area (504). An embodiment AE according to one of the embodiments Q to AD results, the connection areas (502, 504) being connected via a connecting device, for example a union nut (508), the connecting element at least one of the flanges (562) having a free space or Grips in the radial and / or axial direction.

An embodiment AF according to one of the embodiments Q to AE results, the inside diameter of the encompassing connecting device (508) in the rear grip area being larger than the outside diameter of the associated connection area (502).

An embodiment AG according to one of the embodiments AC to AF results, with a sealing device (524) being provided which preferably has at least somewhat larger dimensions than the space made available for the sealing device (524) at the connection areas (502, 504) .

An embodiment AH according to the embodiments AG results, with the sealing device (524) at least approximately on its outer circumference having the shape which the sealing connection surfaces (564) of the connection regions (502, 504) specify.

An embodiment AI according to embodiment E results, the first connection area (602) having a first fixing section (674) to fix the one radiator (610) and a further fixing section (676) to the other radiator to be fixed by (620), the further fixing section (676) at least in places having a smaller or different outer diameter than the diameter of the assigned opening in the other heating element (620), the further fixing section (676) via the second connection area (604) is mechanically and / or fluidically connected to the one heating element (610).

An embodiment AJ according to embodiment AI results, with the further fixing section (676) with a smaller outer diameter at least partially passing through the opening in the other heating body (620). An embodiment AK according to embodiment AJ results, the first connection region (602) having an axial line (603) and at least one radially outwardly directed glue (636) in the second fixing section (676).

An embodiment AL according to the embodiment AK results, the second connection area (604) closing the axial gluing (603), the first connection area (602) defining the further heating element (620) and, if appropriate, a ventilation opening (605) which can be closed, having.

An embodiment AM according to one of the embodiments AI or AJ results, the second connection region (604) having an axial glue (603) and at least one radial glue (636), the axial glue (603) in the assembled state of the connecting element (600) connects to an axial glue (603) of the first connection area (602).

An embodiment AN according to one of the embodiments AI to AM results, a sealing device (644) being provided on the first connection region (602) in a transition region (644) between the one fixing section (602) and the other fixing section (676) in the assembled state against a surface (680) of the heating body (620) can be pressed. and a further sealing device (642) is provided between the second connection area (604) and an associated other surface (642b) of the heating element (620), the sealing devices (644, 642) advantageously having a compressible structure or shape .

In the figures and in particular FIGS. 5 to 15 and 8 to 15, the same reference numerals or reference numerals enlarged by a predetermined number (for example 100) can be used to assign the same or at least functionally identical parts (corresponding parts are, for example, 104, 204, 304, ...).

In Fig. 8 a Röhrenheizköφer 10 is shown with manifolds 13 and 14 heating tubes. In order to assemble a radiator arrangement according to the invention, the tubular heizköφer 10 connection openings for the flow and return 16a, 16b, 18a and 18b. Connecting elements (see FIGS. 10 to 15) can be inserted into these openings 16a, 16b, 18a, 18b and fixed therein.

Fig. 9 shows a Flachheizköφer 20, which has a heating plate 14 with water pipes and manifolds 13 'contained therein.

The flat heating element 20 also has connection openings which are designated in FIG. 9 with the reference symbols 16a ', 16b', 18a 'and 18b'. The connection openings shown in FIG. 8 are shown mirrored to the connection openings shown in FIG. 9 in order to clarify that the sides of the heating elements 10 and 20 which are visible to the viewer of the figures are facing one another.

Instead of a flat heating body and a tubular heating body, for example two tubular heating bodies 10 can also be connected accordingly to form a heating body arrangement according to the invention.

The connection shown in FIG. 10 has a connection area 102 and a connection area 104, which can each be inserted into corresponding openings in the heating elements. It can in the openings 16a, 16a ', 16b, 16b'. ... the Heizköφer 10, 20 pipe sections are used, which are either sunk or protrude from the corresponding Heizköφer. The corresponding pipe sections have been indicated in FIG. 10 by the reference number 190. It is also easily possible to establish a connection without these pipe sections 190.

The two connection areas 102, 104, which can be screwed into the pipe sections 190, for example, by threads, have O-ring seals 132, which have a corresponding sealing surface on the openings or pipes 190 of the heating element or directly on the heating element 10, 20 can be mounted in a sealing connection to the respective radiators 10, 20. The seals 132 provided on the outer circumference of the connection areas 102, 104 can be arranged in corresponding grooves 134 which extend around the outer circumference of the connection areas 102, 104. The respective connection areas 102, 104 end from their sides facing away from the heating elements 10, 20 in flange sections which have respective flat surfaces 122, 128 of different diameters or with different dimensions. The two flanges with the flat surfaces 122, 128 are connected to one another via a union nut 106. The union nut 106 engages with a section 126 which extends radially inwards behind the flange with the smaller plane surface 122 and is connected via a leg 108 with a thread to the flange having the plane surface 128. The respective thread areas are identified by reference number 130. A seal, for example an O-ring seal 124, is arranged between the smaller flat surface 122 and the larger flat surface 128. as shown here, can be accommodated within a groove.

A distance is provided between the radially outermost section of the flange of the connection area 102 having the flat surface 122 and the inside diameter of the union nut 106, which allows the two connection areas 102, 104 to be deflected from the coaxial position to one another. A corresponding game is also provided between the connection area 102 and the section 126. Accordingly, the union nuts can also be designed according to the other embodiments. In this way, manufacturing tolerances can be compensated. In addition, additional angular deviations and thus additional manufacturing tolerances can be absorbed by a circumferentially different pressing of the O-ring 124.

Without parts of the connection 100 that catch these manufacturing tolerances, the radiators of the radiator arrangement according to the invention would brace during assembly and could break out during assembly. They could also be damaged due to the internal tension during operation, when high temperatures over additional thermal expansions stress the connections 100 and the radiators.

FIG. 11 shows a "bone" connecting element 200, which also has connection areas 202, 204, which are mechanically and fluidically connected to one another via a connecting line 238. At openings 203, 205 of the connection areas 202, 204, respective radiators of a radiator arrangement according to the invention are connected. This can be done, for example, by screwing on the threads provided on the outer circumferences of the connection areas 202, 204.

The connecting line 238 has two receptacles 240 into which the respective connection areas 202, 204 are inserted. Seals 242a, 244a, which are held in corresponding grooves 242, 244, are pressed tightly when tightening the connection areas 202, 204 to respective connection surfaces of the receptacle 240 or a heating body (not shown). The connection areas have at least one opening 236, which allow a flow of a heating medium through the connecting element 200.

The receptacles 240 can provide a larger free space than would be required to accommodate the connection areas 202, 204.

The connecting element 200 shown can be screwed from below or from above into the respective heating element of a heating element arrangement according to the invention. Structures at the respective ends 246 of the connection area 202, 204 are used to provide appropriate tools, for example wrenches or screwdrivers, for gripping surfaces.

The connecting element 200 shown can be covered by an elegant housing (not shown), which for example has an oval shape, and is slipped over the connecting element from above or from below.

FIG. 12 shows a further connecting element 300, which is shown here in connection with a valve connection set for a heating body, but can also be seen in connection with the heating body arrangement according to the present invention.

Here, a connection area 302 has a conically tapering shape, on which a seal 324 tapering strongly conically in its front area 324a, for example from a Silicone material is provided. The seal 324 is at least partially surrounded by a connecting element, for example in the form of a union nut 308.

The connection area 304 having a larger diameter can at least partially accommodate the connection area 302. The connection area 304 has on its front section, facing the connection area 302, on its inside diameter a section 348 which widens conically, which essentially corresponds to the section 324a of the seal 324.

If the connection area 302 is fastened to the area 304 via the union nut 308, the connection area 302 is pushed into the connection area 304 while the union nut 308 is being tightened. The seal 324 is pressed and deformed over the surface 348 on the connection area 304. Since the connection area 302 tapers and the union nut 308 leaves a space between the outside diameter of the connection area 302 and the inside diameter of the union nut 308, the connection area 302 can be moved with respect to the connection area 304 with a very wide margin to compensate for manufacturing tolerances. Here, the compression of the seal 324 serves both to seal and to mechanically fix the connection areas 302, 304 to one another. In order to achieve an increased mechanical holding force, a structure is provided on the outer circumference of the connection area 302, into which the pressed seal 324 can engage. Such a structure can consist, for example, of circumferential corrugations or the like, a negative or positive knurling, etc.

The connection valve set shown has a valve 352, by means of which, for example, the flow and return of a radiator can be short-circuited to one another via a bypass or the flow or return connection can be connected to a central heating system. Of course, it is also possible to install the valve set shown corresponding to the mounting situation for the connecting element 200 according to FIG. 9, in which case the connections 368 are flanged blind or are not provided at all. By using a valve at this point, the heating output of a corresponding radiator arrangement according to the invention could be varied by switching the front and the rear radiator on or off.

FIG. 13 shows an embodiment of a connecting element 400 with a special seal 424. The seal 424 has an oval or elliptical area 424a, which in particular merges continuously into a circular area 424b. This circular region 424b then changes into a 90 ° to the first ellipse 424a on the second ellipse 424c. The cross-sectional diameter is conical. The cone runs in opposite directions in longitudinal sections offset by 90 °, i.e. while the cone tapers in a longitudinal section plane, the cone widens in the longitudinal section plane rotated by 90 °.

The connecting element 400 shown at the bottom in FIG. 13 has two connection areas 402, 404. The connection areas 402, 404 have two flange areas 456, 462, the actual sealing surfaces being provided in the connection area 402 in a section 454 with a reduced radial outside diameter and in the connection area 404 in a correspondingly radially outwardly enlarged area with an enlarged inside diameter 455 are. The flange 462 and the connecting element 408 and the configurations connected thereto, in particular the clearances 460, 452, 450, correspond in principle to the corresponding parts of the embodiment according to FIG. 10.

The embodiment of a connecting element 500 according to FIG. 14 is designed correspondingly from the connection areas 502, 504 to the corresponding parts of the embodiment according to FIG. 13.

In a departure from this, the circumferential sealing surfaces 564 on the inner diameters of the flanges 556, 562 are formed in the form of a part circle. The shape is point-symmetrical, the point of symmetry lying on the cylinder axis of the two connection areas 502, 504 arranged coaxially to one another and on the plane lying between the connection areas 502, 504 arranged coaxially to one another. The sealing device 524 is advantageously formed with an outer circumferential sealing surface 524a, which corresponds to the sealing surface 564.

The connection areas 502, 504 of this connecting element 500 can be arranged both with an angle of the cylinder axes of the two connection areas 502, 504 to one another and with an offset, so that this embodiment also makes it possible to compensate for very considerable manufacturing tolerances.

15 shows a radiator arrangement according to the invention with a front radiator 610 and a rear radiator 620 and a connecting element 600.

Radial openings 636 are provided in the connecting element 600 in the interior of the heating element 620 for the fluidic connection of the two heating elements 610, 620. These radial openings 636 connect to an axial glue 603, which opens into the front heating element 610.

The connecting element 600 has a first section 602, which at its end, which is connected to the front heating element 610, has a thread and is provided with a sealing ring 632. If the front connection area 602 is screwed into the front heating element 610, a corresponding tool engages the connection area 602 via a structure, for example a hexagon socket 672.

The connection area 602 has an area 674 with a larger diameter, which advantageously has a relatively short axial extent. A seal 644 is provided on the rear face 644 of the heating element 620 facing the area 674 which has a larger diameter. The connection area 602 has an area 676 with a reduced diameter. which can be inserted into a through opening in the rear heating element 620. The outer diameter of this area 676 with a smaller diameter is smaller than the diameter of the opening in the rear heating element 620 in order to be able to compensate for tolerances or manufacturing tolerances. At its end facing away from the front heating element 610, the first connection area 602 has an interior thread into which the second connection area 604 can be screwed, a seal 642a provided between a surface 642b of the rear heating element 620 and the flange area 642a of the second connection area 604 being pressed in a sealing manner. The relevant surfaces 642a and 678 of the first and second connection regions 602, 604 practically form the jaws of a screw clamp which on the one hand sealingly seals seals 644, 642 and thereby mechanically connect the rear heating element 602, manufacturing tolerances to compensate for the rear heating element 620.

The rear connection area 604 again has an internal structure, for example an internal hexagon 670, for assembly purposes. A vent opening can be provided in the opening 605 of the second region 604 and can be closed, for example, by means of a valve or a sealing screw or the like.

Claims

Expectations

1. Heating device with a first Heizköφer (10) and a cladding, the first Heizköφer (10) preferably having vertically aligned manifolds and connected to it, preferably horizontally aligned heating tubes, with a flow and a return for the heating device, characterized in that that the covering (12) has an extension, so that the area between the header pipes (150) is essentially covered in the direction of the broad side thereof, while the area in the main direction of extension or longitudinal direction of the header pipes is partially uncovered to the front and the To at least partially cover the return.

2. Heating device according to claim 1, characterized in that a second Heizkör¬ per (20) with a front view or front surface is provided. wherein the first and second Heizköφer (10, 20) are arranged one behind the other, the first and the second Heizköφer (10, 20) fluidically and / or mechanically via at least two connecting elements (100, 200, 300, 400).

3. Heating device according to claim 2, characterized in that the supply and the return connection on the second Heizköφer (20) are provided and the panel is provided on the second Heizköφer.

4. Heating device according to claim 2 or 3, characterized in that the second or rear Heizköφer (20) is a Flachheizköφer and / or Röhrenheizköφer.

5. Heating device according to one of claims 2 to 4, characterized in that the second or rear Heizköφer is provided with a flat radiation surface, in which the casing is integrally received, and which substantially covers the forward and the return.

6. Heating device according to one of claims 1 to 5, characterized in that the heating device (100) at the end portion or at the end portion of the first Heizköφers and / or the second heating element has a further area with a different collector tube cross-section and / or possibly connection sections, arm fittings or the like and is clad at least in this further area by the cladding.

7. Heating device according to one of claims 1 to 6, characterized in that the covering has an upper cover surface (14) which has the same extent in Richmng the broad side of the header tubes as the front surface (12) and / or that the covering one has upper and / or lower section (12a, 12d), the dimensions of which over the dimensions of at least one of the heating elements (10, 20). especially the rear (20).

8. Heating device according to one of claims 1 to 7, characterized in that the covering has lateral side surfaces (16) which are arranged at the ends of the front surface (12) in the main direction of extension thereof, and which is preferably at an angle to the front surface (12 ) are angled so that the side surfaces (16) adjoin or adapt to the contour of the collecting tubes (150) in the depth of the heating device.

9. Heating device according to one of claims 2 to 8, characterized in that the second or rear Heizköφer comprises substantially perpendicular heating tubes.

10. Heating device according to one of claims 2 to 9, characterized in that the connecting element (100, 200, 300, 400) has a first and a second connection region (102, 104; 202, 204; 302. 304; 402, 404) , each of which can be fixed in one of the heating bodies (10, 20).

11. Heizköφeranordnung according to claim 10, characterized in that the first connection area (304) has a larger diameter or larger dimensions than the second connection area (302), so that the second connection area (302) axially at least partially in the first connection area (304 ) can be used or vice versa, with either the first and / or the second connection area (302, 304) on its outer and / or The inner surface is provided with at least one circumferential sealing element (324) extending axially to the connection areas (302, 304).

12. Heizköφeranordnung according to claim 10, characterized in that the first connection area (502) and the second connection area (504) on their radially outer sealing connection surfaces (564) are formed at least according to a radius, the starting point of which to the cylinder axis of both connection areas ( 502, 504) lies in the vertical plane, the starting point of the radius revolving around a circular path lying in the parallel plane of the mutually facing ends of the connection regions with a predetermined diameter.

13. Heizköφeranordnung according to claim 10, characterized in that the first connection area (602) has a first fixing section (674) to fix the one Heizköφer (610), and a further fixing section (676) to the other Heizköφer (620) to be fixed, the further fixing section (676) at least in places having a smaller or different outer diameter than the diameter of the assigned opening in the other heating element (620), the further fixing section (676) mechanically via the second connection region (604) and / or is flow-technically connected to the one heating element (610).

CHANGED CLAIMS

[Received at the International Bureau on August 20, 1996 (August 20, 1996), original claims 1-13 replaced by amended claims 1-10 (3 pages)]

1. Heater with a first heater (10) and a panel, the first Heizköφer (10) preferably vertically aligned manifolds and connected to this, preferably horizontally aligned heating tubes, with a flow and a return for the heater, and wherein the Cladding (12) has an extent so that the area between the manifolds (150) is essentially covered in the direction of the broad side thereof, while the area in the main direction of extension or longitudinal direction of the manifolds is partially uncovered, at least around the forward and the return partially to be clad with a second radiator (20) with a front view or front surface, the first and second radiators (10, 20) being arranged one behind the other, the first and second radiators (10, 20) fluidly and / or mechanically via at least two connecting elements (100, 200, 300, 400), characterized in that the supply and return connections and the casing (12) are provided on the second radiator, the second or rear radiator being provided with a flat radiation surface into which the casing is integrally received, and which the supply and the return is essentially disguised.

2. Heating device according to claim 1, characterized in that the second or rear Heizköφer (20) is a Flachheizköφer and / or tubular heater.

3. Heating device according to one of claims 1 or 2, characterized in that the heating device (100) at the end portion or at the end portion of the first radiator and / or the second radiator a further area with a different collector pipe cross-section and / or optionally connecting sections. Fittings or the like and is covered by the panel at least in this further area.

4. Heating device according to one of claims 1 to 3, characterized in that the covering has an upper cover surface (14) which in the direction of the broad side of the Collector tubes have the same extent as the front surface (12) and / or that the cladding has an upper and / or lower section (12a, 12d), the dimensions of which, in particular, concern the dimensions of at least one of the heating elements (10, 20) the rear (20), go out.

5. Heating device according to one of claims 1 to 4, characterized in that the covering has lateral side surfaces (16) which are arranged at the ends of the front surface (12) in the main direction of extension thereof, and which is preferably at an angle to the front surface (12 ) are angled so that the side surfaces (16) adjoin or adapt to the contour of the collecting tubes (150) in the depth of the heating device.

6. Heating device according to one of claims 1 to 5, characterized in that the second or rear Heizköφer comprises substantially perpendicular heating tubes.

7. Heating device according to one of claims 1 to 6, characterized in that the

Connecting element (100, 200, 300, 400) has a first and a second connection area (102, 104; 202, 204; 302, 304; 402, 404), which are respectively in one of the heating elements (10, 20 ) can be determined.

8. Radiator arrangement according to claim 7, characterized in that the first connection area (304) has a larger diameter or larger dimensions than the second connection area (302), so that the second connection area (302) axially at least partially in the first connection area (304 ) can be used or vice versa, wherein either the first and / or the second connection area (302, 304) on its outer and / or inner surface each have at least one circumferential sealing element (324) extending axially to the connection areas (302, 304) are.

9. Radiator arrangement according to claim 7, characterized in that the first connection area (502) and the second connection area (504) on their radially outer sealing connection surfaces (564) are formed at least according to a radius, the starting point of which to the cylinder axis of both connection areas ( 502, 504) vertically lying plane, the starting point of the radius revolving around a circular path lying in the parallel plane of the mutually facing ends of the connection regions with a predetermined diameter.

10. Heizköφeranordnung according to claim 7, characterized in that the first connection region (602) has a first fixing section (674) to fix the one radiator (610), and a further fixing section (676) to the other radiator (620) to be fixed, the further fixing section (676) at least in places having a smaller or different outer diameter than the diameter of the associated opening in the other heating element (620), the further fixing section (676) mechanically via the second connection region (604) and / or is technically connected to the one radiator (610).

Declaration under Article 19 (1)

The new claim 1 has been delimited from DE-U-94 19 970 and differs in an inventive manner from the subject of this prior publication.

The generic document relates to a Heizkoφer with a central mirror cladding. the forward and return of this Heizkoφers are provided in the middle of a free space. In this way the brave mirror or a central cover plate can be used to cover the front and rear sounds. As a further embodiment, it is proposed according to FIG. 4 that a second layer of heating pipes is also co-fired via the same collecting pipe 8 for the heating pipes of the single-layer heating body

The features in the characterizing part of the new patent claim 1 are new compared to this document as well as to the other documents listed in the international search report.

Since the features in the characterizing part of the new claim 1 cannot be deduced from the state of the art, and no suggestions can be found in this, an inventive step was also necessary in order to be able to develop the subject matter of the new claim 1.