Heater

Abstract

The present disclosure relates to a heating element (2; 102) having at least one heating strand (4) comprising a flat, elongated, insulated heating module (12), at least one heat-emitting element (6), two flat, elongated longitudinal side elements (8) extending along the at least one heating strand (4) and the at least one heat-emitting element (6) and extending on opposite outer longitudinal sides of the heating element (2; 102), and two flat, elongated transverse side elements (10; 110) extending transversely to the at least one heating strand (4) and the at least one heat-emitting element (6) on opposite outer transverse sides of the heating element (2; 102), the end sections of which are connected to end sections of the longitudinal side elements (8).According to the disclosure, at least one of the longitudinal side elements (8) is designed as a spring clip such that the at least one heat-emitting element (6) is pressed against the heating module (12) of the at least one heating strand (4) by the spring clip, and the at least one heating strand (4) has a positioning frame (14) which extends all around the heating module (12) and which is mounted relative to the heating module (12) by means of first stops (42, 46, 48) and relative to the at least one heat-emitting element (6) by means of second stops (58, 60, 62, 64, 66), each with a predetermined play (68, 70, 80, 82).

Description

Technical area

[0001] The present invention relates to a radiator, in particular designed as a heating register, according to the preamble of claim 1, in particular to a radiator with a heating module having at least one heating element, in particular designed as a PTC element, which is arranged between two contact sheets, in particular made of aluminum, and is at least partially encased in an insulating sheath (e.g. Kapton® film) made in particular of a polyimide or a polyetherimide (PEI). The radiator has at least one heat dissipation element, in particular made of aluminum, which is in thermal contact with the heating element and can dissipate heat, in particular via corrugated fins, to a fluid surrounding the heat dissipation element. State of the art

[0002] A radiator of this type is known, for example, from DE 10 2017 120 467 A1, which describes the structure of an insulated heating register. According to DE 10 2017 120 467 A1, a heating module with several heating elements, contact plates, and an insulation sleeve is pressed into an extruded aluminum profile. Additionally, a heat-dissipating element in the form of corrugated fins is fixed to the extruded profile by rolling a shoulder.

[0003] The disadvantage of the heater according to the state of the art is that cyclic operation with numerous on / off phases leads to a drastic malfunction: Due to thermally different expansions (caused by the different thermal expansion coefficients of the materials), the various components shift relative to each other. This can cause the heating module to move out of the extruded profile and / or the insulation sleeve to tear, which can directly lead to a short circuit. Furthermore, this "movement" is also observed in the rolled corrugated fins. Disclosure of the invention

[0004] The object of the present invention is therefore to provide a radiator with an at least partially insulated heating module, in which damage to an insulation casing during cyclic operation of the radiator is prevented or at least the probability of such damage is reduced.

[0005] This object is achieved by the features of claim 1. Advantageous further developments are the subject of the subclaims.

[0006] A radiator according to the disclosure has at least one heating strand, at least one heat-emitting element, two longitudinal side elements and two transverse side elements.

[0007] The at least one heating strand has a flat, elongated heating module in which at least one heating element is arranged between two contact plates and in which an insulating sleeve at least partially surrounds the heating element and the two contact plates.

[0008] The at least one heating element can, in particular, be a PTC element (i.e., an element with a PTC resistor). A heating module according to the disclosure can preferably comprise a plurality of heating elements arranged one behind the other in the longitudinal direction of the heating module or the respective heating strand. In particular, a plurality of heating elements can be arranged one behind the other directly adjacent to one another (i.e., without any structures extending therebetween).

[0009] The contact plates can preferably be made of aluminum or an aluminum alloy.

[0010] The insulating sleeve can preferably be made of an electrically insulating plastic, e.g., polyimide or polyetherimide. In particular, the insulating sleeve can be provided in the form of a Kapton® film. The Kapton® film can preferably be wrapped several times, in particular at least three times, around the at least one heating element. The Kapton® film can be welded, glued, or pressed to a large and / or small longitudinal side of the heating module. The Kapton® film can be welded, glued, or pressed to a tube-folded end face of the heating module.

[0011] "At least partially surrounded" can mean in particular that the insulation sheath shields / electrically insulates the heating element in five of six mutually perpendicular directions or does not shield / electrically insulate the heating element in only one direction.

[0012] The at least one heat-emitting element is in thermal contact with the heating module via its insulating shell and is intended to emit or be able to emit heat to a fluid surrounding the heat-emitting element.

[0013] The heat-dissipating element can, in particular, comprise corrugated fins, for example, made of aluminum or an aluminum alloy. Preferably, the heat-dissipating element can comprise cover plates, for example, made of aluminum, an aluminum alloy, and / or a brass alloy. The corrugated fins can preferably be arranged between two cover plates such that the apex of the corrugated fins rests on one of the cover plates.

[0014] The two longitudinal side elements are flat and elongated and extend along the at least one heating element and the at least one heat-emitting element on opposite outer longitudinal sides of the radiator such that the at least one heating element, the at least one heat-emitting element, and the longitudinal side elements are arranged in a common plane. The longitudinal side elements are preferably made of steel or stainless steel.

[0015] The two transverse side elements are flat and elongated and extend transversely to the at least one heating element and the at least one heat-emitting element on opposite, outer transverse sides of the radiator. End sections of the transverse side elements are each connected to a corresponding end section of the longitudinal side elements. The two transverse side elements are arranged in the common plane of the at least one heating element, the at least one heat-emitting element, and the longitudinal side elements. The transverse side elements are preferably made of plastic.

[0016] Preferably, the heating element can have at least two heat-emitting elements arranged on opposite sides of the heating element. Particularly preferably, the heating element can have multiple heating elements and multiple heat-emitting elements, the number of heat-emitting elements can be one greater than the number of heating elements, and the heat-emitting elements and the heating elements can be arranged alternately between the longitudinal side elements such that a heat-emitting element extends along each of the longitudinal side elements.

[0017] In other words, the heating body has a frame formed from the longitudinal side elements and the transverse side elements, which frame encloses the at least one heating strand or its heating module and the at least one heat emitting element.

[0018] According to the disclosure, at least one of the longitudinal side elements is designed as a spring clip such that the at least one heat-dissipating element is pressed or pushed against the heating module of the at least one heating strand by the spring clip. Preferably, both longitudinal side elements can be designed as spring clips. The longitudinal side elements as spring clips are preferably made of steel, e.g., stainless steel with resilient properties. Alternatively, a spring clip according to the disclosure can also be made of a resilient high-temperature plastic.

[0019] The at least one heating strand has a positioning frame, in particular designed as an electrical insulator, which extends all around the heating module and which is fixed / mounted with predetermined play relative to the heating module by means of first stops and relative to the at least one heat-emitting element by means of second stops.

[0020] In other words, the positioning frame is positively connected to the heating element in such a way that the positioning frame is movable relative to the heating module and relative to the heat-emitting element within a predetermined extent, but upon reaching the predetermined extent abuts against the heating module and / or the heat-emitting element.

[0021] The positioning frame can in particular be designed such that the heating module is positively connected to the positioning frame, taking into account a predetermined freedom of movement or play.

[0022] In a configuration in which the heating element has at least one heating strand and two heat-emitting elements which are located on opposite sides of the heating strand on the heating module, the positioning frame and the two heat-emitting elements can in particular be designed such that the two heat-emitting elements form-fit the positioning frame between them, taking into account a predetermined freedom of movement or play.

[0023] The term "play" may refer to an extent of freedom of movement of the positioning frame in its longitudinal direction, in its height direction (transverse direction transverse or perpendicular to the common plane of the at least one heating strand, the at least one heat dissipation element and the longitudinal and transverse side elements) or in its width direction (transverse direction parallel to the common plane) or to an average of two or all of these dimensions.

[0024] The term "predetermined play" expresses that a corresponding amount of freedom of movement is provided during the manufacture of the radiator and does not arise only through wear, warping or other damage during operation of the radiator.

[0025] If the at least one heat-emitting element is pressed onto the heating module via the spring clip and a movable positioning frame is provided on the heating element, it is possible to advantageously prevent or at least reduce the probability that repeated increases and decreases in volume of the heating module during cyclic operation will lead to mechanical stresses, due to which the insulation shell is damaged and / or the connection between the at least one heat-emitting element and the heating module is deteriorated.

[0026] According to one aspect of the present disclosure, the predetermined clearance between the positioning frame and the at least one heating module may be greater than the predetermined clearance between the positioning frame and the at least one heat dissipating element.

[0027] If a larger clearance is provided between the heating module and the positioning frame, the comparatively larger expansions caused in the immediate vicinity of the heating module can be advantageously taken into account.

[0028] According to one aspect of the present disclosure, the insulating sleeve may have an opening and one of the first stops may be formed as a projection on the positioning frame that projects through the opening and can come into direct contact with the at least one heating element and / or with at least one of the contact plates.

[0029] The opening of the insulation sleeve can be provided in particular by an insulation film (e.g. Kapton ®< film) made in particular from a polyimide or polyetherimide being wound around the at least one heating element and being folded or closed or glued, welded or pressed in a tube-fold manner only on one end face of the at least one heating element.

[0030] If a stop is provided which limits the freedom of movement of the heating module without the interposition of the insulation cover, the load on the insulation cover can be advantageously reduced.

[0031] According to one aspect of the present disclosure, the projection extending through the opening of the insulation cover may close the opening.

[0032] If the projection projecting through the opening of the insulating sleeve is designed in such a way that it closes the opening, the electrical insulation of the heating module can be advantageously improved without at least excessively increasing the load on the insulating sleeve in the event of thermal expansion.

[0033] According to one aspect of the present disclosure, one of the first stops can be designed in the form of two projections arranged next to one another on the positioning frame, which projections can receive a tube-fold-shaped section of the insulating sleeve between them and whose respective free end can come into contact with the at least one heating element via the insulating sleeve resting on the at least one heating element and / or can come into contact with the contact plate via the insulating sleeve resting on at least one of the contact plates.

[0034] In other words, the positioning frame may have a projection provided with a recess, wherein the recess is designed to receive an enlarged portion of the insulation sleeve such as the tubular fold-shaped portion.

[0035] By bypassing more elastic parts of the insulation sheath, the flexibility of the corresponding stop can be advantageously reduced.

[0036] According to one aspect of the present disclosure, the at least one heating strand may comprise at least one cable extending therefrom in the longitudinal direction of the heating module, and at least one feedthrough may be provided on the positioning frame accordingly.

[0037] According to one aspect of the present disclosure, the positioning frame may have a temperature sensor in the region of the at least one heating element.

[0038] If a temperature sensor is provided in the positioning frame, the temperature in the immediate vicinity of the heating module can be advantageously monitored.

[0039] According to one aspect of the present disclosure, one of the transverse side elements may have a temperature sensor in the region of the at least one heat dissipation element.

[0040] If a temperature sensor is provided in one of the transverse side elements, the temperature sensor can be easily replaced in the event of a malfunction.

[0041] According to one aspect of the present disclosure, at least one of the transverse side elements can be formed with plug-in connection parts in such a way that the at least one transverse side element formed with plug-in connection parts can be mechanically and / or electrically connected to a corresponding transverse side element formed with plug-in connection parts of an identically constructed radiator.

[0042] In particular, the plug-in connection parts can be designed in such a way that the at least one heating strand of the radiator can be electrically connected to the at least one heating strand of the identically constructed radiator and can thus be made jointly controllable.

[0043] The plug-in connection parts make it possible to easily create a more powerful heating system.

[0044] According to one aspect of the present disclosure, a system according to the disclosure may comprise at least one radiator according to the disclosure, wherein at least one of the transverse side elements of the radiator is configured to simultaneously serve as a transverse side element of a further radiator according to the disclosure arranged on the radiator.

[0045] If transverse side elements are designed in such a way that they can be part of several radiators, heating systems for higher outputs can be created easily.

[0046] According to one aspect of the present disclosure, at least two adjacent longitudinal side elements of the adjacent radiators of the system according to the disclosure can be formed in one piece.

[0047] If adjacent long side elements are formed as a single piece, the connection between the adjacent radiators can be improved. Brief description of the drawings

[0048] The present invention will be described in more detail below using preferred embodiments with reference to the accompanying drawings. They show: Fig. 1 an isometric view of a radiator according to the disclosure; Fig. 2 an exploded view of the radiator disclosed; Fig. 3 an exploded view of heating elements and contact plates according to the disclosure; Fig. 4 an exploded view of a heating module according to the disclosure and corresponding connecting cables; Fig. 5 an isometric view of the heating module according to the disclosure with the connecting cables; Fig. 6 an exploded view of a heating element according to the disclosure; Fig. 7, Fig. 8 and Fig. 9 Views of a revelation-based position framework; Fig. 10 a view of the heating strand according to the disclosure; Fig. 11 an exploded view of the heating strand according to the disclosure with two heat dissipation elements according to the disclosure and a spring clip; Fig. 12 one of the Fig. 11 corresponding view from a perspective from which a side of the spring clip facing the heat-dissipating elements is visible; Fig. 13 a view of the spring clip according to the disclosure; Fig. 14 a view of the heating strand according to the disclosure together with cover plates of adjacent heat dissipation elements; Fig. 15 a view of the end faces of the heating strand according to the disclosure and the cover plates of the heat dissipation elements; and Fig. 16 a view of an alternative embodiment with a transverse side element designed for several radiators.

[0049] Identical or functionally equivalent features are provided with the same reference numerals in the individual figures. Detailed description of preferred embodiments

[0050] Fig. 1 shows an isometric view of a radiator 2 according to the disclosure. The radiator 2 has six heating strands 4, seven heat-emitting elements 6, two longitudinal side elements 8, and two transverse side elements 10, all of which extend in a common plane. The heating strands 4, the heat-emitting elements 6, and the longitudinal side elements 8 extend parallel to one another. The transverse side elements 10 extend transversely or perpendicularly to the longitudinal side elements 8, the heat-emitting elements 6, and the heating strands 4.

[0051] As in the Fig. 2 As shown in the exploded view, the heating strands 4 have heating modules 12 embedded between the heat-emitting elements 6. The heating strands 4 or their heating modules 12 and the heat-emitting elements 6 are alternately stacked on top of one another. To limit the freedom of movement of the heating modules 12 in the lateral direction (with respect to the flat heating modules 12), the heating strands 4 have positioning frames 14. The positioning frames 14 are designed to limit the movement of a corresponding heating module 12 out of the space formed by the two adjacent heat-emitting elements 6.

[0052] The longitudinal side elements 8 and the transverse side elements 10 frame the heat dissipation elements 6 and the heating modules 12. During assembly, the heating modules 12, each framed by a positioning frame 14, are first embedded between the heat dissipation elements 6. The assembly of the alternately stacked heat dissipation elements 6 and heating strands 4 is then arranged between the two longitudinal side elements 8. In order to create or ensure thermal contact between the heating modules 4 and the heat dissipation elements 6 for heat conduction, the longitudinal side elements 8 are moved towards each other so that they press the assembly of the alternately stacked heat dissipation elements 6 and heating strands 4 together and thus press or press the heat dissipation elements 6 against a corresponding heating module 4. In this state of compressive stress, the longitudinal side elements 8 are connected to the transverse side elements 4.

[0053] The structure of the heating strands 4 is shown in the Figuren 3 bis 10 illustrated.

[0054] Fig. 3 shows an exploded view of heating elements 16 and corresponding contact plates 18 according to the disclosure. The four heating elements 16 are designed as ceramic PTC elements, which are coated with electrode material on their flat sides to enable electrical contact. The PTC elements are arranged in a row in the longitudinal direction of the flat contact plates 18. The contact plates 18 are made of aluminum or an aluminum alloy, but could also be made of copper or another heat- and electrically conductive material. A connection 20 is provided on each end face of the contact plates 18. When the heating strand 4 is assembled, cables or connecting cables 22 are connected to the connections 20 (see Fig. 2 ).

[0055] In the assembled state of the heating element 2, the electrical and thermal connection between the heating elements 16 and the contact plates 18 is maintained by pressure (see arrows A in Fig. 3 ) and the resulting frictional force. Additionally, the heating elements 16 can be glued to the contact plates 18.

[0056] Fig. 4 shows an exploded view of the heating module 12 and the corresponding connecting cables 22. The connecting cables 22 are attached to the terminals 20 by crimping in the assembled state of the heating strand 4 (see arrows B in Fig. 4 ). Alternatively, the connecting cables 22 can also be soldered to the terminals 20. Contacting by suitable riveting is also possible. The heating module 12 has an insulating sleeve 24, which has the shape of a tube with an open end 26 and a closed end 28. In the assembled state of the heating module 12, the insulating sleeve 24 is placed with its open end over the layered assembly of the heating elements 16 and the contact plates 18 (see arrow C in Fig. 4 ).

[0057] The insulation sleeve 24 is formed, among other things, by multiple, typically triple, winding of a polyimide or polyetherimide or Kapton ®< film. The closed end 28 is formed by a tube fold, which is in particular glued, welded or pressed. The free edge of the polyimide or polyetherimide or Kapton ®< film, which is located on the outside after winding, is glued, welded or pressed to a section of the polyimide or polyetherimide or Kapton ®< film located below the free edge. The free edge can be on a flat side of the planar insulation sleeve 24 (see dashed line 30 in Fig. 4 ) and / or on one long side of the elongated insulation cover 24 (see dash-dot line 32 in Fig. 4 ) glued, welded or pressed.

[0058] In the Figuren 5, 6 and 10 the insulation cover 24 is shown transparent.

[0059] Fig. 5 shows an isometric view of the heating module 12 with the connecting cables 22 in the assembled state. The insulating sleeve 24 is placed over the heating elements 16 arranged between the contact plates 18. The open end 26 of the insulating sleeve 24 is arranged at the terminals 20, and the connecting cables 22 extend from the contact plates 18 through the open end 26 of the insulating sleeve 24 and protrude from the insulating sleeve 24.

[0060] The insulation sleeve 24 is dimensioned such that, in the assembled state of the heating module 12, it projects beyond the contact plates 18 at the open end 26 and a resulting projection 34 covers the connections 20.

[0061] Fig. 6 shows an exploded view of heating element 4.

[0062] In order to mount the heating module 12 in the positioning frame 14 or to attach the positioning frame 14 to the heating module 12, the insulation sleeve 24 is first arranged on the contact plates 18 in such a way that the connections 20 are not covered by the projection 26. In this state, a connection-side part of the positioning frame 14 is placed on the heating module 12 in the area of ​​the connections 20 (see arrow D in Fig. 6 ). The closed end 28 or the tube fold of the heating module 12 is then threaded into a fold-side part of the positioning frame 14 opposite the connection-side part, whereby the insulation sleeve 24 is deformed (see arrow E in Fig. 6 ). Finally, the assembly of the heating elements 16 and the contact plates 18 are pivoted into the positioning frame, whereby at the same time the insulation sleeve 24 is returned to its undeformed state (see arrow F in Fig. 6 ), so that finally the overhang 34 is present again (cf. Fig. 10 ).

[0063] In the Figuren 7, 8 and 9 the positioning frame 14 is shown in more detail.

[0064] The positioning frame 14 has a substantially rectangular outline and encloses a substantially rectangular opening 36. The positioning frame 14 has two opposing, parallel, elongated frame longitudinal parts 38 and two opposing, parallel frame transverse parts 40. The longitudinal frame parts 38 extend perpendicular to the frame transverse parts 40. The ends of the longitudinal frame parts 38 are connected to one another via the frame transverse parts 40. The positioning frame 14 is preferably formed in one piece.

[0065] Inner sides 42 of the frame longitudinal parts 38 facing the opening 36 correspond to first stops in the sense of the present disclosure.

[0066] On the inner sides 44 of the frame cross parts 40 facing the opening 36, a projection 46 is provided in the connection-side part of the positioning frame 14 and two projections 48 are provided in the rebate-side part of the positioning frame 14.

[0067] The connection-side projection 46 is particularly mandrel-shaped and extends in the longitudinal direction of the positioning frame 14, with the free end of the projection 46 projecting into the opening 36. Cable receptacles 50, particularly channel-shaped, are provided on both sides of the connection-side projection 46 on an underside of the connection-side frame cross-part 40.

[0068] The rebate-side projections 48 are in particular plate-shaped and each extend in the longitudinal direction of the positioning frame 14, wherein one of the two rebate-side projections 48 is arranged on an upper side of the rebate-side frame cross-part 40 and the other rebate-side projection 48 is arranged on an underside of the rebate-side frame cross-part 40. The rebate-side projections 48 each have a substantially rectangular outline and are each formed in a corresponding corner of the opening 36 such that one edge of the rebate-side projection 48 extends along and parallel to the rebate-side frame cross-part 40 and an edge of the rebate-side projection 48 perpendicular thereto extends along and parallel to one of the frame longitudinal parts 38 or the corresponding inner side 42.Accordingly, a free edge of each rebate-side projection 48 extends parallel to the rebate-side frame transverse part 40 and a free edge of each rebate-side projection 48 perpendicular thereto extends parallel to the frame longitudinal parts 38.

[0069] The two fold-side projections 48 extend parallel to each other and are spaced both in the direction parallel to the frame cross-member 40 and in the direction normal to the opening 36. Accordingly, the fold-side projections 48 form a gap 52 parallel to the frame cross-members 40 for receiving the tubular fold of the insulation sleeve 24. Furthermore, the fold-side projections 48 form a gap 54 extending normal to the opening 36 or parallel to the inner sides 42 of the frame longitudinal members 38.

[0070] The connection-side projection 46 and the rebate-side projections 48, like the inner sides 42, are first stops within the meaning of the present disclosure.

[0071] The inner sides 42 are designed as first stops to limit, in the mounted state of the heating module 12, a movement of the heating module 12 in a direction parallel to the frame cross members 40 (cf. Fig. 10 ).

[0072] The projections 46 and 48 are designed as first stops to limit, in the mounted state of the heating module 12, a movement of the heating module 12 in a direction parallel to the frame longitudinal parts 38 (cf. Fig. 10 ).

[0073] Longitudinal strips 56 are formed on a respective top side and a respective bottom side of the longitudinal frame parts 38. The longitudinal strips 56 each have an inner side 58 that is offset from the opening 36 relative to the inner side 42 of the corresponding longitudinal frame part 38. The distance between the inner sides 58 of two opposing longitudinal strips 56 is therefore greater than the distance between the inner sides 42 of the opposing longitudinal elements 38.

[0074] On the connection-side frame cross-part 40, two, in particular, cuboid-shaped projections 60 are provided on an upper side and one, in particular, cuboid-shaped, projection 62 is provided on the underside between the cable receptacles 50.

[0075] On the rebate-side frame cross-part 40, a projection 64, in particular a cuboid-shaped projection, is provided on an upper side and projections 66, in particular a cuboid-shaped projection, are provided on an underside.

[0076] The longitudinal strips 56 or the inner sides 58 of the longitudinal strips 56 as well as the projections 60, 62, 64 and 66 correspond to second stops in the sense of the present disclosure.

[0077] The longitudinal strips 56 or the inner sides 58 of the longitudinal strips 56 are designed as second stops to limit, in the assembled state of the radiator 2, a movement of the positioning frame 14 relative to the heat-emitting element 6 closest to the longitudinal strips 56 in a direction parallel to the frame cross members 40 (cf. Fig. 15 ).

[0078] The projections 60 and 64 on the upper sides of the frame cross members 40 are designed as second stops to limit, in the assembled state of the radiator 2, a movement of the positioning frame 14 relative to the heat-emitting element 6 closest to the upper sides of the frame cross members 40 in a direction parallel to the frame longitudinal members 38.

[0079] The projections 62 and 66 on the undersides of the frame cross members 40 are designed as second stops to limit, in the assembled state of the heating element 2, a movement of the positioning frame 14 relative to the heat-emitting element 6 closest to the undersides of the frame cross members 40 in a direction parallel to the frame longitudinal members 38 (cf. Fig. 14 ).

[0080] The extent to which the heating module 12 is mounted with play relative to the positioning frame 14 is shown in Fig. 10 clarified. Fig. 10 is a view of the heating strand 4 in a state in which the heating module 12 is mounted in the positioning frame 14.

[0081] In the longitudinal direction of the heating module 12, in the radiator 2 according to the disclosure, a clearance 68 is provided between the free end of the connection-side projection 46 and connection-side ends of the contact plates 18 or between the fold-side projections 48 and the insulating sleeve 24 resting on the fold-side ends of the contact plates 18.

[0082] In the transverse direction of the heating module 12, a clearance 70 is provided between the inner sides 42 of the longitudinal frame parts 38 and the insulating sleeve 24 resting on the longitudinal sides of the contact plates 18 in the radiator 2 according to the disclosure.

[0083] In the assembled state of the heating module 12, the closed end 28 of the insulation sleeve 24, designed as a tube fold, extends between the fold-side projections 48 and the connection-side projection 46 projects into the open end 26 of the insulation sleeve 24.

[0084] Fig. 11 shows an exploded view of the heating strand 4 with two heat dissipation elements 6 and a longitudinal side element 8 designed as a spring clip.

[0085] The heat-dissipating elements 6 have corrugated fins 72 arranged between two cover plates 74. The corrugated fins 72 are soldered to the cover plates 74. Alternatively, the cover plates 74 can be pressed against the corrugated fins 72 solely by the compressive force generated by the longitudinal side element 8, designed as a spring clip, when the radiator 2 is assembled.

[0086] The two cover plates 74 of each heat-dissipating element 6 are constructed identically as L-profiles, with one leg of each L-profile being much longer than the other. When the heat-dissipating element 6 is assembled, the two cover plates 74 are positioned rotationally symmetrically against one another such that the short legs of the cover plates 74 form the short sides of a frame with a substantially rectangular outline, and the long legs of the cover plates 74 form the long sides of the frame. The corrugated fins 72 are arranged inside the frame.

[0087] Fig. 12 shows one of the Fig. 11 corresponding view from a perspective from which a side of the longitudinal side element 8 designed as a spring clip facing the heat-emitting elements 6 is visible.

[0088] Fig. 13 shows a further view of the spring clip according to the disclosure. The longitudinal side element 8, designed as a spring clip, is shaped as a U-profile, the lateral straps or flanges of which are double-walled, and in the web of which spring tongues 76 are formed by H-shaped cutouts. The spring tongues 76 extend away from the straps or, in the assembled state of the radiator 2, in the direction of the heat-dissipating elements 6. The spring tongues 76 are also designed to allow longitudinal movements or longitudinal expansions during heating. For this purpose, edges of the spring tongues 76 are angled, which allows the spring tongues 76 to slide on the cover plate. Furthermore, the spring tongues 76 are arranged in pairs such that the spring tongues 76 of each pair extend symmetrically to one another.A connecting hook 78 is provided on each end face of the web, by means of which the longitudinal side element 8, designed as a spring clip, can be connected to a corresponding transverse side element 10. The longitudinal side elements 8 are preferably made of steel with resilient properties. Alternatively, the longitudinal side elements 8 can also be made of a resilient high-temperature plastic.

[0089] Fig. 14 shows a view of the heating strand 4 together with the cover plates 74 of the adjacent heat dissipation elements 6. Fig. 15 shows a view of the end faces of the heating strand 4 and the cover plates 74 of the adjacent heat dissipation elements 6.

[0090] Fig. 14 illustrates the extent to which the positioning frame 14 is mounted with play relative to an adjacent heat-emitting element 6 in the longitudinal direction of the positioning frame 14. In the longitudinal direction of the positioning frame 14, in the radiator 2 according to the disclosure, a play 80 is provided between the projection 62 on the underside of the rebate-side frame cross-part 40 and a rebate-side end of the heat-emitting element 6 or the short leg of the L-shaped cover plate 74, as well as between the projections 66 on the underside of the connection-side frame cross-part 40 and a connection-side end of the heat-emitting element 6 or an end face of the long leg of the L-shaped cover plate 74.

[0091] The clearance (not shown) between the projections 60 on the upper side of the connection-side frame cross-part 40 and a connection-side end of a corresponding heat-emitting element 6 and between the projection 64 on the upper side of the rebate-side frame cross-part 40 and a rebate-side end of the corresponding heat-emitting element 6 is provided according to the clearance 80.

[0092] Fig. 15 clarifies the extent to which the positioning frame 14 is mounted with play relative to adjacent heat-emitting elements 6 in the transverse direction of the positioning frame 14. In the transverse direction of the positioning frame 14, a play 82 is provided between the inner sides 58 of the longitudinal strips 56 and the longitudinal sides of the corresponding heat-emitting element 6 in the radiator 2 according to the disclosure.

[0093] Fig. 16 shows a view of an alternative embodiment with a transverse side element 110 designed for several radiators 102.

[0094] The radiators 102 according to the second embodiment are largely identical in construction to the radiator 2 according to the first embodiment. Only with regard to the rebate-side transverse side element 10 does the radiator 102 according to the second embodiment differ from the radiator 2 according to the first embodiment.

[0095] The transverse side element 110 is designed to receive on a first side ends or connecting hooks 78 of longitudinal side elements 8 of a first radiator 102 (in the manner of the radiator 2 according to the first embodiment) and to receive on a second side opposite the first side ends or connecting hooks 78 of longitudinal side elements 8 of a second radiator 102 (also in the manner of the radiator 2 according to the first embodiment).

[0096] According to a further embodiment not shown, the system according to Fig. 16be designed such that the two longitudinal side elements 8 arranged on the same longitudinal side of the system are formed in one piece. List of reference symbols

[0097] 2; 102 Radiator 4 Heating element 6 Heat emitting element 8 Longitudinal side element 10; 110 Transverse side element 12 Heating module 14 Positioning frame 16 Heating element 18 Contact plate 20 Connection 22 Connection cable 24 Insulation sleeve 26 Open end of the insulation sleeve 28 Closed end of the insulation sleeve 30, 32 Free edge of the insulation sleeve 34 Overhang 36 Opening of the positioning frame 38 Longitudinal frame part 40 Transverse frame part 42 Inside of the longitudinal frame part 44 Inside of the transverse frame part 46 Connection-side projection 48 Rebate-side projection 50 Cable receptacle 52,54Gap 56Longitudinal strips 58Inside of the longitudinal strip 60Protrusion on the top side of the connection-side frame cross-section 62Protrusion on the underside of the connection-side frame cross-section 64Protrusion on the top side of the rebate-side frame cross-section 66Protrusion on the underside of the rebate-side frame cross-section 68Play between heating module and positioning frame in the longitudinal direction of the heating module 70Play between heating module and positioning frame in the transverse direction of the heating module 72Corrugated fins of the heat dissipation element 74Cover plate of the heat dissipation element 76Spring tongue 78Connecting hook 80Play between positioning frame and heat dissipation element in the longitudinal direction of the positioning frame 82Play between positioning frame and heat dissipation element in the transverse direction of the positioning frame , AMovement of the contact plate during assembly BMovement of the connecting cable during assembly CMovement of the insulation sheath during assembly DMovement of the terminals during assembly E, FMovement of the closed end during assembly ...'Reference symbols marked with an apostrophe refer to a radiator of the same construction or to components of a radiator of the same construction

Claims

1. A heating element (2; 102) with at least one heating strand (4) which has a flat, elongated heating module (12), in which at least one heating element (16) is arranged between two contact plates (18) and in which an insulating sleeve (24) at least partially surrounds the heating element (16) and the two contact plates (18), at least one heat-emitting element (6) which is in thermal contact with the heating module (12) via its insulating sleeve (24) and which is intended to emit heat to a fluid surrounding the heat-emitting element (6), two flat, elongated longitudinal side elements (8) which extend along the at least one heating strand (4) and the at least one heat-emitting element (6) and which are arranged on opposite outer longitudinal sides of the heating element (2;102), in that the at least one heating strand (4), the at least one heat-emitting element (6) and the longitudinal side elements (8) are arranged in a common plane, and two flat, elongated transverse side elements (10; 110) extending transversely to the at least one heating strand (4) and the at least one heat-emitting element (6) on opposite, outer transverse sides of the heating element (2; 102), the end sections of which are connected to end sections of the longitudinal side elements (8) and which are arranged in the common plane of the at least one heating strand (4), the at least one heat-emitting element (6) and the longitudinal side elements (8), ; characterized in thatat least one of the longitudinal side elements (8) is designed as a spring clip such that the at least one heat-emitting element (6) is pressed by the spring clip onto the heating module (12) of the at least one heating strand (4), the at least one heating strand (4) has a positioning frame (14) which extends all around the heating module (12) and which is mounted relative to the heating module (12) by means of first stops (42, 46, 48) and relative to the at least one heat-emitting element (6) by means of second stops (58, 60, 62, 64, 66), each with a predetermined play (68, 70, 80, 82).

2. Radiator (2; 102) according to claim 1, characterized in that the predetermined clearance (68, 70) between the positioning frame (14) and the at least one heating module (12) is greater than the predetermined clearance (80, 82) between the positioning frame (14) and the at least one heat-emitting element (6).

3. Radiator (2; 102) according to claim 1 or 2, characterized in thatthe insulating sleeve (24) has an opening (26) and one of the first stops is designed as a projection (46) on the positioning frame (14), which projects through the opening (26) and can come into direct contact with the at least one heating element (16) and / or with at least one of the contact plates (18).

4. Radiator (2; 102) according to claim 3, characterized in that the projection (46) projecting through the opening (26) closes the opening (26).

5. Radiator (2; 102) according to one of claims 1 to 4, characterized in thatone of the first stops is designed in the form of two projections (48) arranged next to one another on the positioning frame (14), which can receive a tube-fold-shaped section of the insulating sleeve (28) between them and whose respective free end can come into contact with the at least one heating element via the insulating sleeve resting on the at least one heating element and / or with the contact plate (18) via the insulating sleeve (24) resting on at least one of the contact plates (18).

6. Radiator (2; 102) according to one of claims 1 to 5, characterized in that the at least one heating strand (4) has at least one cable (22) which extends in the longitudinal direction of the heating module (12) therefrom, and the positioning frame (14) provides a corresponding feedthrough for the at least one cable (22).

7. Radiator (2; 102) according to one of claims 1 to 6, characterized in thatthe positioning frame (14) has a temperature sensor in the region of the at least one heating element (16).

8. Radiator (2; 102) according to one of claims 1 to 7, characterized in that one of the transverse side elements (10; 110) has a temperature sensor in the region of the at least one heat-emitting element (6).

9. Radiator (2) according to one of claims 1 to 8, characterized in that at least one of the transverse side elements (10) is designed with plug-in connection parts in such a way that the at least one transverse side element (6) designed with plug-in connection parts can be mechanically and / or electrically connected to a corresponding transverse side element (6') of an identically constructed radiator (2') designed with plug-in connection parts.

10. System with at least one radiator (102) according to one of claims 1 to 8, characterized in thatat least one of the transverse side elements (110) is designed to simultaneously serve as a transverse side element (110') of a further radiator (102') arranged on the radiator (102) according to one of claims 1 to 7.

11. System according to claim 10, characterized in that at least two adjacent longitudinal side elements of the adjacent radiators are formed in one piece.

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