CZ298943B6 - Heating element - Google Patents

Abstract

The present invention relates to a heating element (1, 1', 1'', 1''') having at least one heat-emitting plate (2, 2', 2'') , with which is connected at least one heat-conducting convector clamped between two plates (2, 2', 2'') or one plate (2) and a fixture component attachable thereto. The convector comprises at least two meander-shaped bent plates (13) each passing parallel to and between said two plates (2), whereby said convector plates (13) can slide on each other during their parallel movement, whereby clamping of the convector is made by enlargement of effective width of the two convector plates (13).

Description

A heater (1, Γ, 1, Γ) having at least one heat transfer plate (2, 2 ', 2) and at least one convector connected thereto in a thermally conductive manner, the convector being clamped between two plates (2, 2'),

2) or a plate (2) and a fastening element attachable thereto. The convector consists of at least two convector plates (13) which are bent in a wavy manner and each of which extends parallel to and between two plates (2), the plates (13) being slidable relative to each other in parallel displacement, the convector being clamped by increasing the effective width of the two convector sheets (13).

and

Heater

Technical field

The invention relates to a heater having at least one heat transfer plate and at least one convector connected thereto thermally conductive, the convector being clamped between two plates or plate and a fastening element attachable thereto.

BACKGROUND OF THE INVENTION

Such heating elements are widely used and known, for example, from DE 297 22 841 U, DE 85 02 780 U1, DE 88 02 017 U1 and DE 93 20 444 U1.

DE 85 02 780 U1 discloses a heater with two plates or panels made up of two corrugated and welded sheets. The plates enclose vertically extending channels through which hot water flows. A convector made of sheet metal is also attached to the raised sections of the plates, and also convexly curved, the spacing of the projections corresponding to the projections of the plates.

The connection between the convector and the plate is made by spot welds.

DE 88 02 017 U1 also discloses one construction-related principle. The plates facing outwards are flat. The connection between the wave-shaped or zigzag-shaped convector plates and the projections of the inwardly facing corrugated plates of the plates is again achieved by spot welding.

From DE 93 20 444 U1, it is finally known to have a heater with only one plate and also a wave-shaped, one-piece convector plate connected to it by spot welding.

All known heaters of this type have the common disadvantage that the heat transfer from the plate to the convector is not optimal due to the spot welding connection. It is not possible to ensure that the parts between the spot welds are fully adjacent to the slab. Even slight air gaps, which may also arise after painting the heating element, considerably reduce heat transfer compared to a full-area direct connection.

Another disadvantage of the welded connection between the convector and the plate is the fact that due to the non-detachable connection it is not possible to change the convector plate sufficiently or to add additional convector plate.

However, such a possibility of variation is to be sought because, for example, on the basis of one and the same basic concept, for example two parallel plates, it is perfectly customary to offer a heater with convector plates facing each other on a single plate. such a convector plate on a single plate or a heater with either one or two convector plates but having a reduced height compared to the plate. In this way, different heating outputs can be realized with the same external dimensions of the heating element, since the convective fraction of heat transfer can be varied depending on the convector sheet arrangement.

All welded joints known in the prior art are assigned to three or four variants of said heating elements manufactured separately and stored as finished parts, since the final handling, i.e. painting, always follows after welding. As a result, there is a considerable need for storage space for various types of known heating elements.

-1 CZ 298943 B6

It is an object of the present invention to provide a heater in which, on the one hand, the heat transfer between the plate and the convector is improved and which further allows to reduce the storage space needed to prepare different types of heaters based on the same basic plate design.

SUMMARY OF THE INVENTION

According to the invention, this object is achieved with a heater of the type initially mentioned in that the convector consists of at least two convector plates which are bent in wave form and each extending parallel to and between two plates, the plates being slidable relative to one another in parallel displacement, wherein the convector grip is realized by increasing the effective width of the two convector sheets.

Preferably, the convector sheets are of aluminum.

Preferably, the convector sheets are compressed in their built-in position relative to the initial state by a height of 0.5 to 7 mm.

Preferably, the convector sheet strips are flanked on the plates against lateral displacement.

Preferably, the fastening element is a rail or plate connected to the plate.

Preferably, the rail or sheet is in the initial state curved and, in its mounting position, is supported by its entire length on the edge strips of the convector sheet which are facing away from the plate.

Preferably, the fastening element is at least one wave-shaped fixation plate which is welded to the plate and which overlaps the end sections of the applied wave-shaped convector plate.

Preferably, one fixing plate is provided on opposite sides of the plate.

The invention is further elucidated in more detail by means of several exemplary embodiments of heating elements with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Giant. 1 is a perspective view of a heater comprised of two plates with flowing water and a wave-shaped 40 convector sheet located between the plates;

Giant. 2 as in FIG. 1, but with a shortened convector sheet with a narrow section and a single plate;

Giant. 3 is a top view of the heater of FIG. 1;

Giant. 4 is a top view of the heater of FIG. 2;

Giant. 5 shows a cross section of a convector plate;

Giant. 6 as in FIG. 5, but with less division;

Giant. 7 is a top view of a heater with two plates and a wave-shaped convector sheet placed between the plates;

-2GB 298943 B6

Giant. 8 shows a cut-out of two mutually supported convector sheets with glass-like contact surfaces;

Giant. 9 shows a cut-out of a pair of similar convector sheets with a weld-shaped clamping element therebetween;

Giant. 10 shows a side view of a heater with two convector sheets with step-shaped contact surfaces before assembly;

Giant. 11 as in FIG. 10, but after assembly;

Giant. 12 is a schematic representation of the convector sheet deformation;

Giant. 13 a plate with convex folds for a convector plate;

Giant. 14 a plate with raised surfaces for convector plate;

Giant. 15 shows a plate with straight side faces;

Giant. 16 shows a side view of a heating element with pairs of convector sheets;

Giant. 17 connection of a pair of convector sheets with fixation tape;

Giant. 18 connecting a pair of convector sheets with an adhesive strip;

Giant. 19 connection of a pair of convector sheets with a fiber-reinforced self-adhesive fabric;

Giant. 20 is a rear view of a heater with one plate and one convector combined of steel and aluminum parts;

Giant. 21 is a side view of the heater of FIG. 20.

DETAILED DESCRIPTION OF THE INVENTION

1 and 3, the heater 1 consists of two plates 2 of two sheets of hot water flowing and two aluminum convector sheets 3 arranged between them. The two plates 2 are connected at their corners by a total of four T-pieces 4. two open Tkus 4 connections are closed, two hot water inlets and chilled water circuit pass through two others.

The two convector sheets 3 are arranged mirror-like and mutually supported in the vertical central plane of the heating element 1 and clamped between two plates 2 so that good contact between the plates 2 and the plates 2 is achieved due to the formability of the thin convector plates 3.

In Figures 2 and 4, the heater Γ is of substantially identical design. Only the height 7 of the convector sheet 31 is significantly smaller than the height 6 of the convector sheet 3. Furthermore, the partition 7, i.e. the center pitch of the pair of adjacent interfaces, of the convector sheet 3 is smaller than the partition 7 of the convector sheet 3.

Since the total surface of the convector plate 3 and 3) is approximately constant, it is possible to achieve approximately the same transfer power with both heating elements 1a and 1. The greater height 6 of the air channels 8 formed by the convector sheets 3 leads in conjunction with their larger diameter

To the same optimum flow rate as for shorter lengths, but also in cross-section of reduced air ducts 8 / heater /.

5 and 6 show a part of the convector plate 3 in cross-section. The two convector sheets 3 are formed in the same way, of the same material and with the same basic dimensions. By folding as in the accordion, the partition 7 of the convector sheet 3 of FIG. 5 is 50% larger than the partition 7 of FIG. 6. Due to the differences of partition 7 and 7, the widths of the two convector sheets 3 are slightly different. assembly is not significant.

FIG. 7 shows an alternative two-plate heater 17 with a single corrugated sheet 3 between the plates 2.

Giant. 8 shows the possibility of adjusting the clamping of a heater whose two plates are already fixed to each other at a fixed distance by means of a T-piece. The two convector sheets 13 are shaped so that their wedge-shaped contact surfaces 14 slide one after the other relative to each other between the two convector sheets 13. This mutual displacement can be achieved, for example, by means of a continuous pulling cable 15 connected to connection points 16, e.g. As the tension cable 15 moves in the direction of the arrows 7 and 18, the useful width of the two convector sheets 13 increases, thereby affecting the clamping of these parts between the two plates.

An alternative clamping option is shown in FIG. 9. The faces 14 'of opposing convector sheets 13' facing each other are formed in a V-shape. Between the two convector sheets 13 'there is a rotatably mounted cam-like clamping element 19, starting from solid lines. the indicated neutral position can be brought to the gripping position shown in a dashed line by rotating through 90 °, thereby pushing the convector sheets 13 'apart.

FIGS. 10 and 11 show a third clamping principle where two convector sheets 23 are provided with recesses of the same spacing on their longitudinal sides 20 which can engage with each other in the form of teeth. In the position shown in FIG. 10, the overall width of the convector sheet 23 is less than the spacing between the two plates 2. In the mounting position shown in FIG. 11, the raised portions of the sides 20 lie on top of each other and the top and bottom faces 21 and 22 of the convector sheets. 23 are in alignment with each other. In this position it is fastened by clamping the convector sheets 23 between the two plates 2.

Giant. 12 shows schematically how, based on the neutral position of the convector plate 3, the substantially rectilinear shape in the central part 24, due to compression, becomes the bulging shape shown in dashed lines. This reduces the height of the convector plate 23 by a section 25.

Giant. Figures 13 to 15 show various embodiments of contact surfaces of convector sheets with plates. On the side facing the convector plate 3, the plate 7 according to FIG. 3 has a series of transversely extending grooves of equal pitch, which are adapted to the curvature of the edge strips 26 of the convector plate 3. In this way not only good heat transfer can be achieved. thus ensuring that the edge strips 26 always have the same rise (same pitch) relative to each other.

The object of obtaining reliable fixation of the contact areas of the convector plates on the plates is solved in the embodiment according to FIG. 14 in that the convector plate 33 is provided in its flat edges 50 with grooved recesses which partially surround the substantially hexagonal water channels 27 of the plate 2, thereby preventing the plate 2, 2 from moving parallel to the convector plate 33.

-4GB 298943 B6

On the other hand, the convector plate 33 'of FIG. 15 is also formed in the contact areas flat to the double-sided flat plate 2. Due to the wide contact surfaces there is no risk of lateral deformation of the individual folds of the convector plate 33'.

Giant. 16 shows that the convector sheets 33 may be arranged on top of each other in multiple layers. The layer heights correspond in each case to the opposing convector sheets 33. In the present case, on each plate 2, five convector sheets 33 are arranged in layers immediately adjacent to each other. This can increase the flexibility of the individual convector sheets 33 and thereby reduce the clamping force required. It can be seen that the convection of the shaft formed by the convector plates 33 are in alignment with each other in the mounted state.

When the convector sheets 3 are deformed, these sheets have a curvature to the contact areas with the plates. In order to ensure that the convector sheets 3 lie in two mutually parallel planes on the edge regions adjacent to the plates and in the interfaces with the convector sheets opposite each other and that all the edge strips 28 are equidistant from each other, at least one fixing strip 29 is used. which is connected by a form-fit connection (closure) to its boundary and to the perpendicularly extending edge strip 28 of the convector plate 3.

In order to form a positive fit, the edge strips 28 are provided with recesses (not shown) in which the projections 30 are arranged equidistant from each other in the manner of fixation pins or toothing and arranged on both sides of the fixation strip 29. 3 is secured to the fixing tape 29 by means of a clamp 31.

In Fig. 18 there is an alternative possibility for fixing the mutually supported convector sheets 3. Here, instead of the preferably metal fixing strip 29, a self-adhesive strip 34 is used. Mutual displacement of the convector sheets 3 is thus prevented as well as an additional change of division.

Instead of a self-adhesive strip, it is also possible to perform full-surface bonding of the convector sheets 3 with the aid of a self-adhesive fabric 35, as shown in FIG. 19.

Giant. 20 and 21 finally show yet another heater T having only one single plate

2. On this plate 2, a wave-shaped convector plate 36 is provided in the upper and lower regions, which is spot-welded with the plate 2. The steel convector sheets 36 serve as fasteners for the actual convector sheet 3, which consists of aluminum and only with the help of fasteners by clamping it adjoins the plate 2. This clamping is made possible by two overlapping areas 37 in which the convector sheets 36 are in cross-section adapted to convector plates

3, externally on these convector sheets 3 by clamping. The clamping principle can also be transferred to the single-plate heating element 1 '.

As an alternative to the combination of short welded steel convector sheets 36 and the long-held aluminum convector sheet 3, it is also conceivable, irrespective of welding the steel convector sheets, to fix the aluminum convector sheet with a slightly bent clip in the neutral position. of the convector plate opposite to the plate 2 and at its ends connected to the plate 2 by means of tensile bias arms.

-5GB 298943 B6

PATENT CLAIMS

Claims (7)

1. A heater (1, Τ, 1, 1 ') having at least one heat transfer plate (2, 2', 2) and at least one convector connected thereto in a thermally conductive manner, the convector being clamped between two plates (2) , 2 ', 2 ”) or a plate (2) and a fastening element attachable thereto, characterized in that the convector consists of at least two convector plates (13) which are bent in a wave form and each of which extends parallel to and between two 10, the plates (13) being slidable relative to one another in parallel displacement, wherein the convector is clamped by increasing the effective width of the two convector plates (13). Heating device according to Claim 1, characterized in that the convector sheets (3, 3 '), 15, 13, 13 ', 23, 33, 33') are of aluminum. Heating element according to claim 1 or 2, characterized in that the convector sheets (3, 3 ', 3, 13, 13', 23, 33, 33 ') are compressed in their built-in position by a height of 0 relative to the initial state. , 5 to 7 mm. Heating element according to one of Claims 1 to 3, characterized in that the edge strips (26) of the convector plates (3, 33) are secured against lateral displacement on the plates (2, 2). Heating element according to one of Claims 1 to 4, characterized in that the fastening element is a rail or plate connected to the plate. Heating element according to claim 5, characterized in that the rail or sheet is bent by default and is mounted in its mounting position along its entire length on the edge strips of the convector sheet which are facing away from the plate. Heating element according to one of Claims 1 to 4, characterized in that the fastening element is at least one wave-shaped fixing plate which is welded to the plate (2) and which overlaps the end sections of the applied wave-shaped convector plate (3). Heating element according to Claim 7, characterized in that a fixing plate is provided on opposite sides of the plate (2). 11 drawings -6GB 298943 B6 7GB 298943 B6 0BR.3 0BR.4 Ο8 * 7 ’ 3 ’ 1 ’