DE202010015951U1 - Surface heat exchanger element - Google Patents

Abstract

A surface heat exchanger element (10), which is formed as a prefabricated panel of a room-mounted cooling ceiling (11), comprising a perforated support (12), with a plurality of openings (13) in the assembled state of the panel from the visible side (27) forth, so from a viewer located in the room, are recognizable, and comprising on the back (28) of the carrier arranged, meandering pipe loop (15), which is traversed by a coolant, characterized in that the back of the carrier sections with Metal sheets (19) and in sections with fleece (21) is occupied, that at least the metal sheets (19) are glued directly to the support (12), and in that Wärmeleitbleche (20) are provided, the respective areas (16a, 16b, 16c, 16d) of the pipe loop overlap such that the pipe loop between the Wärmeleitblech (20) and the metal sheet (19) is arranged.

Description

The invention relates to a surface heat exchanger element according to the preamble of claim 1.

Such surface heat exchanger elements, so-called panels, are known in the art and have been developed and manufactured by the applicant for some time.

These are such surface heat exchanger elements that serve to form a cooling ceiling of a building space. Such a cooling ceiling, for example, mounted on the ceiling side and includes numerous, z. B. in the manner of a grid, arranged panels or panel elements. The individual panels are prefabricated, d. H. they form a finished handling unit, and are mounted on the ceiling only to install the cooling ceiling on the site. It is construction site only necessary to serially connect the individual panels associated pipe loops together to provide a closed coolant circuit. The coolant used is typically water. However, other coolants can be used.

The known, prefabricated panel has a perforated carrier with a plurality of openings. Typically, the support is a sheet of metal, such as an unpainted or white painted metal sheet.

On the rear side of the carrier sheet, a nonwoven fabric is arranged in a surface heat exchanger element of the prior art, which occupies the entire back of the carrier. The fleece is glued to the back of the carrier. The pipe loop is arranged on the back of the fleece.

The numerous holes or openings in the carrier, in conjunction with the fleece arranged on the back, provide the desired, attractive appearance of the cooling ceiling composed of numerous panels and in particular also for meeting the technical requirements for room acoustics. In particular, the numerous openings and also the fleece on the back of the carrier to avoid a disturbing halls in the room, which would otherwise be expected with a smooth, metallic surface.

Recently, a number of disadvantages have been noted in the known structure of such a surface heat exchanger element.

On the one hand, it can be stated that the adhesive between fleece and carrier sheet often does not meet the existing requirements in the long term. But if it comes to a release of this adhesive bond, the heat transfer from the pipe loop through the web through to the carrier is significantly reduced. Thus, the cooling performance of the cooling ceiling is reduced overall. Another disadvantage is that a reduced in consequence damage the adhesive bond cooling performance is not readily measurable or recognizable. Also, a visual inspection of the adhesive layer can not be accomplished from the visible side.

In order to avoid the anyway considered disadvantageous heat transfer through the web through, surface heat exchanger elements of the generic type are also known, in which the heat exchanger tubes are directly adhered directly to the sheet. For this purpose z. B. has been provided to glue the heat exchanger tube directly with so-called black adhesive on the plate.

Alternatively, with regard to the disadvantages associated with the use of black adhesive, attempts had also been made to color heat exchanger tubes black and then to stick them with a conventional adhesive.

However, both alternatives do not lead to the desired properties in terms of room acoustics and visual impression. On the one hand, the desired uniform overall visual impression is not achieved from the visible side, since the tube loops are recognizable. On the other hand, the unwanted halls can not be avoided to the desired extent.

The present invention is therefore based on the object, such a further develop a known surface heat exchanger element of the generic type that under consideration of high demands on room acoustics and room optics improved thermal conductivity properties can be achieved.

The invention solves this object with the features of claim 1, in particular with those of the characterizing part, and is accordingly characterized in that the back of the carrier is partially occupied with metal sheets and sections with fleece that at least the metal sheets are adhered directly to the carrier, and that Wärmeleitbleche are provided, each overlap portions of the pipe loop such that the pipe loop is disposed between the Wärmeleitblech and the metal sheet.

The principle of the invention is essentially to provide the back of the carrier in sections with metal sheets. These can be arranged in stripes and run preferably along the rectilinear portions of the pipe loop. The strip-shaped metal sheets are glued directly to the back of the carrier.

In each case between two strip-shaped metal sheets is a strip-shaped fleece section. This nonwoven portion may also be glued to the back of the carrier, or be laid. The nonwoven strip is usually located under the arcuate portions of the pipe loop.

The rectilinear portions of the pipe loop are glued or placed on the strip-shaped metal sheets and are overlapped by strip-shaped Wärmeleitblechen. The Wärmeleitbleche be z. B. also glued to the rectilinear sections and / or glued with their lateral longitudinal edges on the metal sheets. Thus, the rectilinear portions of the pipe loop are each encompassed by a Wärmeleitblech and a metal sheet on each side.

In this way, there is an optimized heat conduction from the coolant via the particular existing copper pipe pipe loop on the Wärmeleitblech and the metal sheet directly on the support. The cooling ceiling can cool the building space in this way very efficiently, with very little heat loss, d. H. to deprive him of heat.

The metal sheet is preferably painted on the side facing the carrier, in particular painted dark. The nonwoven strip is preferably provided of a dark material. As a nonwoven in the context of the present patent application, any suitable, in particular textile fabric is understood, which z. B. consists of individual fibers and is formed fleece-like. In particular, so-called acoustic nonwovens or corresponding surface sections of mineral wool are used. As materials that may also be considered to achieve the desired optical and acoustic properties of the cooling ceiling, also materials such as fabrics, knitted fabrics, knitted fabrics, membranes, open-pore materials, or the like may be mentioned.

Preferably, the nonwoven material is formed substantially uniform and has at least on its side facing the wearer on a uniform, preferably dark color. Thus, the viewer of the cooling ceiling is obtained from the visible side a uniform color impression that meets the requirements of the visual impression.

Through the use of strip-like nonwovens beyond the desired acoustic sound-absorption property or sound-diffusion property of the cooling ceiling is achieved. The invention recognizes that the existing requirements can also be met if only strip-shaped nonwoven materials are used, in combination with strip-shaped metal sheets.

Advantageously, each surface heat exchange element comprises only four straight sections and three U-shaped arches connecting the four sections. This means a significant reduction in the overall axial length of the pipe loop compared to conventional pipe loops, which require six straight sections and five U-shaped arcs for the same outer dimensions of the prefabricated panel. The heat exchanger element according to the invention can thus achieve the same cooling performance with a considerably reduced length of the copper tube.

According to an advantageous embodiment of the invention, only the straight portions of the pipe loop are overlapped by Wärmeleitblechen. The strip-shaped Wärmeleitbleche have a width which is smaller than the width of a metal sheet. In other words, the strip-shaped metal sheets are formed so wide that they are at least slightly wider than the strip-shaped Wärmeleitbleche. The Wärmeleitbleche can therefore be glued with their lateral edges on the back of the metal sheets or connected in any other suitable manner.

The metal sheet may for example consist of aluminum. The heat-conducting plate may for example consist of aluminum.

According to an advantageous embodiment of the invention, substantially the entire back of the carrier is covered with fleece, or metal sheets. This promotes a uniform impression of the panel from its visible side.

Advantageously, the carrier is provided from a perforated plate. The holes can be arranged along a regular grid.

In particular, as carriers for a surface heat exchanger element according to the invention, perforated plates according to the DIN 24041 into consideration. The holes may preferably have a circular shape. However, any other contours for the holes may also be provided.

Alternatively, it is also possible to use plasterboard as a carrier, wherein holes are also provided in the plasterboard.

Each panel may have a box or cassette shape. It may further have a substantially smooth underside, and marginally slightly raised side walls.

Alternatively, however, the planar surface heat exchanger element according to the invention may also be substantially plate-shaped and, for example, clamped in the manner of a clamping cassette in a predetermined grid of a cooling ceiling or alternatively mounted in a corresponding fastening device. In the last two mentioned cases, high-drawn sidewalls can also be dispensable.

Further advantages of the invention will become apparent from the non-cited subclaims, and with reference to the following description of the embodiments illustrated in the figures. Show:

1 in a perspective schematic view of a building space with ceiling-side arranged cooling ceiling with a surface heat exchanger element according to the invention,

2 in a schematic perspective plan view of an embodiment of a prefabricated panel according to the invention, wherein essential element of the heat exchanger element according to the invention are not shown, for example, the pipe loop, but also the nonwoven strips, metal sheets and Wärmeleitbleche are omitted for simplicity,

3 a series arrangement of two inventive surface heat exchanger elements according to the invention in a schematic representation, wherein dashed lines a connecting arc is shown, which connects the pipe loop sections of the two abutting heat exchanger elements together,

4 in a schematic representation in plan view an embodiment of a surface heat exchanger element according to the invention, and

5 the embodiment of 4 in a schematic, partially sectioned view along section line VV in 4 ,

The following description of the exemplary embodiments illustrated in the drawings should be noted that, even if different embodiments or parts or elements are described, they are for the sake of simplicity with the same reference numerals, partially with the addition of small letters, respectively.

1 shows in a schematic, perspective, broken view of a building room, at the top of a cooling ceiling 11 consisting of several surface heat exchanger elements according to the invention 10 exists, is arranged. It can be seen that several identical, preconfigured and pre-assembled panels 10 are arranged along a grid.

The cooling ceiling 11 is attached to the ceiling of the building room and suspended. For this purpose, z. B., not shown, conventional pendulum-type suspension devices may be provided. Each two adjacent panels can also be directly connected to each other, for. B. are screwed.

For one arranged in the room, in 1 schematically illustrated observer, is the cooling ceiling 11 only from their side of view 27 recognizable. In from surface heat exchanger elements according to the invention 10 composite cooling ceilings 11 It is important that for an observer, a uniform impression of the visible side 27 results. For this purpose, each panel on its bottom side a plurality of holes, which will be described later. In 1 is only for the center panel 10 a lot of holes 13 indicated. In fact, all panels preferably have a cooling ceiling 11 corresponding holes on.

2 shows the panel 10 in individual view diagonally from above. The panel 10 includes a floor 12 , the so-called carrier, in which a variety of openings or holes 13 are arranged. side walls 14a . 14b . 14c . 14d are from the edges of the bottom plate 12 pulled up and give the panel a total of slightly box-shaped or cassette-like shape. One speaks in this respect also of a coffered ceiling.

In 2 not shown fastening devices or mounting holes to attach a panel according to the invention on a building ceiling.

It should also be noted that the dimensions of a panel according to the invention 10 in the drawings are merely to be understood schematically. In particular, the height of the side walls 14a . 14b . 14c . 14d in 2 exaggerated.

1 indicates that when the cooling ceiling is mounted 11 the undersides of the individual panels are arranged substantially flush with each other, so that overall a continuous smooth underside 27 the cooling ceiling results.

Next to the viewer is the 1 clearly that the bottom of the cooling ceiling 11 is provided with numerous holes or openings, so that results in a very uniform visual impression. The numerous holes 13 Among other things, they serve to provide optimal room acoustics in which Hall effects are largely prevented or suppressed.

Based on 3 will now be explained briefly how two inventive surface heat exchanger elements 10a and 10b arranged side by side and connected to each other.

Each of the two surface heat exchanger elements 10a . 10b includes a pipe loop 15 which is meander-shaped. In the embodiment of the 3 has each surface heat exchanger element 10a . 10b a pipe loop 15 on, the four straight-lined sections 16a . 16b . 16c . 16d and three arcuate sections 17a . 17b . 17c , The pipe loop 15 is each on the back 28 of the carrier 12 arranged. Consequently, the pipe loops 15 from the visible side 27 a panel 10 not immediately recognizable.

Each surface heat exchanger element 10 , as it later still on the basis of 4 and 5 is explained in detail is prefabricated, ie it forms a handling unit, which is only at the site, on site, mounted and connected to other panels.

For mounting a cooling ceiling 11 Each individual surface heat exchanger element must be attached to the building ceiling and, if necessary, be fixed relative to adjacent surface heat exchanger elements. To achieve a closed cooling circuit, the two open ends of each two pipe loops 15 about a in 3 indicated by dashed additional sheet element 18 or a hose connected to each other. This is done by the installer on site.

In 3 while the situation is shown that although surface heat exchanger elements according to the invention 10a . 10b under the plant of their narrow sides, abutting one another, connected in series. Equally, it is also possible that two corresponding surface heat exchanger elements according to the invention 10a . 10b with their broad sides adjacent to each other to form a serial pipe loop circuit are interconnected.

Based on 4 and 5 Now, the inventive feature of the new surface heat exchanger element 10 be explained:

4 shows a schematic plan view of the back 28 a surface heat exchanger element according to the invention 10 ,

You can see the pipe loop first 15 that, as already in 3 explained, meandering along the back 28 of the carrier 12 runs, and four straight sections 16a . 16b . 16c . 16d and three arcuate, substantially U-shaped sections 17a . 17b . 17c having.

The entire back 28 of the carrier 10 is with strip-shaped metal sheets 19 and strip-shaped fleece sections 21 occupied. 4 shows four strip-shaped metal sheets 19 and three strip-shaped nonwoven sections 21a . 21b . 21c ,

Each strip-shaped metal sheet 19 has a width 24 which is larger than the width 25 a fleece strip 21 ,

Each strip-shaped metal sheet 19 has a length that is the width of the panel 10 total corresponds. Also every strip-shaped fleece section 21 has a length that corresponds to the length of the strip-shaped metal sheet. The fleece section 21 is therefore as long as the panel 10 is wide.

Upper side of the metal sheet 19 and a straight line section 16a the pipe loop 15 is a so-called Wärmeleitblech 20 intended.

The width 24 a metal sheet 19 is calculated so that this width 24 larger, at least slightly larger than the width 23 the Wärmeleitbleches 20 , The heat conducting sheet 20 extends along each of a straight section 16a . 16b . 16c . 16d the pipe loop 15 and overreaches this.

In particular 5 reveals, each holds a Wärmeleitblech 20 together with a metal sheet 19 the respective straight pipe section 16a (as well 16b . 16c . 16d ) between themselves. The straight pipe section 16a is thus essentially on all sides of Wärmeleitblech 20 and sheet metal 19 includes. It is advantageous to achieve an optimized heat transfer between pipe loop 15 and carriers 12 when the straight pipe section 16a on its outer circumferential surface on all sides or almost all sides of sheet metal 19 and Wärmeleitblech 20 contacted, that is closely enclosed by these two elements.

The Wärmeleitblech has a length 22 which is about as long as the length of a straight pipe section 16a , The length 22 of heat conducting 20 is so far less than the length of the metal sheet 19 ,

In the area of a bow (eg the bow 17a ) leaves the pipe loop 15 the Wärmeleitblech 20 and traverses a strip-shaped fleece section 21 ,

This results in a configuration of alternating metal strips 19 and fleece strips 21 , The entire back 28 of the carrier 12 is so with metal strips 19 and fleece strips 21 occupied.

The bottom 26 of the metal sheet 19 , so the the support plate 12 facing side of the metal sheet 19 , is painted, especially painted dark. The metal sheet 19 is with its bottom 26 directly on the back 28 of the carrier 12 eye glued.

The fleece strip is also made of a dark material.

From the visible side 27 the surface heat exchanger element 10 ago, or from the perspective of an observer a mounted cooling ceiling 11 according to 1 , this results in a uniform hole pattern so far, all holes are closed at the back or covered by a dark element. An overall dark layer ensures a uniform optical finish. A viewer of the cooling ceiling 11 recognizes no difference between the dark layer of the metal sheet 19 and the dark layer of the nonwoven strip 21 ,

By arranging the nonwoven strip 21 in connection with the intended arrangement of the metal sheet 19 In addition, the requirements for optimized room acoustics can be fulfilled.

Preferably, the heat conduction is 20 with its longitudinal edges on the metal sheet 19 glued. Optionally, also in the connection region between the top of the straight pipe section 16 and the Wärmeleitblech 20 an adhesive connection, but at least provided a positive connection.

The pipe loop 15 can be in the range of their rectilinear sections 16 with her bottom on the metal sheet 19 be glued, or fixed in a suitable other way. Preferably, a contacting and / or permanently solid compound is preferred.

Due to the fact that the fleece sections 21 only in the areas of the carrier 12 are provided by the arches 17 be traversed forms the fleece 21 no more hindrance to heat conduction. It is in the surface heat exchanger element according to the invention 10 just as in the prior art, so that the arcuate sections 17 the pipe loop 15 not or only to a lesser extent in direct thermal contact with the carrier 12 stand.

The heat conduction from the cooled coolant through the copper pipe of the pipe loop 15 takes place in the surface heat exchanger element according to the invention 10 directly on the heat conduction plate 20 , or directly on the metal sheet 19 , Thus, the heat or cold of the coolant can directly with the carrier plate 12 change.

The carrier plate 12 can be made from a perforated metal sheet 19 exist, but alternatively also from a provided with holes plasterboard.

The width 24 of the metal sheet 19 is preferably chosen such that it is at least as large as the width 23 a Wärmeleitbleches 20 ,

The length 22 a Wärmeleitbleches 20 is preferably selected to be about the length of a straight line section 16a . 16b . 16c . 16d the pipe loop 15 equivalent.

With the proposed construction of a surface heat exchanger element 10 An optimized cooling performance can be achieved.

The fleece stripes 21 can on the carrier 12 be glued, alternatively, but also inserted, or be trapped. In an embodiment of the invention, not shown, the nonwoven strips 21 with their longitudinal edges also between the metal sheets 19 and the carrier plate 12 clamped and possibly also glued there. In this embodiment, the nonwoven strip 21 even directly with the carrier 12 be glued.

In a further alternative embodiment, the nonwoven strip can be clamped with its longitudinal edges and between Wärmeleitblech and sheet metal, or there also be glued with. Also in this embodiment, the nonwoven strip can additionally directly on the carrier 12 be stuck.

It will be clear to the person skilled in the art that the chosen dimensions and proportions of the exemplary embodiments are to be understood only schematically in the drawings. So can the width and length of Wärmeleitbleche 20 , the width and length of the metal sheets 19 and the width and length of the nonwoven strips 21 be chosen individually if required, for example, the individual shape of a pipe loop 15 be adjusted.

It is crucial that the entire back 28 the carrier plate 12 is covered with dark materials, and that at least part of the back 28 with fleece stripes 21 is busy.

Furthermore, it is essential that an immediate transfer of heat from the coolant at least along the rectilinear sections 16 with the help of Wärmeleitblechen 20 and metal sheets 19 directly on the carrier plate 12 takes place without any heat transfer through an insulating non-woven layer 21 must be done through.

In a further, not shown embodiment of the invention may also be the metal sheet 19 and optionally also the heat conduction 20 be formed perforated. This allows the acoustic properties of a cooling ceiling 11 be further improved in terms of avoiding reverberation effects.

It can also be provided that in a metal sheet 19 or optionally in a Wärmeleitblech 20 provided openings or holes have larger diameter or opening widths than those in the support plate 12 arranged openings, or holes 13 ,

This facilitates the achievement of a flush arrangement of the holes in the metal sheets 19 to the holes 13 in the carrier plate 12 ,

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• DIN 24041 [0026]

Claims (10)

Surface heat exchanger element ( 10 ), which is a prefabricated panel of a room-mounted cooling ceiling ( 11 ), comprising a perforated support ( 12 ), with a plurality of openings ( 13 ), which in the assembled state of the panel from the visible side ( 27 ), ie from an observer in the room, are recognizable, and comprising one on the back ( 28 ) of the carrier, meandering tube loop ( 15 ), which can be traversed by a coolant, characterized in that the back of the carrier in sections with metal sheets ( 19 ) and in sections with fleece ( 21 ) is occupied, that at least the metal sheets ( 19 ) directly on the support ( 12 ) are glued, and that Wärmeleitbleche ( 20 ), each containing areas ( 16a . 16b . 16c . 16d ) of the pipe loop overlap such that the pipe loop between the Wärmeleitblech ( 20 ) and the metal sheet ( 19 ) is arranged. Surface heat exchanger element ( 10 ) according to claim 1, characterized in that the raw loop ( 15 ) straight sections ( 16a . 16b . 16c . 16d ) and curved sections ( 17a . 17b . 17c ), in particular four straight sections and three U-shaped arches. Surface heat exchanger element ( 10 ) according to claim 1 or 2, characterized in that only the straight sections ( 16a ) of the pipe loop of Wärmeleitblech ( 20 ). Surface heat exchanger element ( 10 ) according to one of the preceding claims, characterized in that the heat conducting plates ( 20 ) are each strip-shaped and have a width ( 23 ) which is smaller than the width ( 24 ) of a metal sheet ( 19 ). Surface heat exchanger element ( 10 ) according to one of the preceding claims, characterized in that the metal sheet ( 19 ) consists of aluminum. Surface heat exchanger element ( 10 ) according to one of the preceding claims, characterized in that the metal sheet ( 19 ) on its the carrier ( 12 ) facing side ( 26 ), in particular painted dark, is. Surface heat exchanger element ( 10 ) according to one of the preceding claims, characterized in that the entire back ( 28 ) of the carrier ( 12 ) with strip-shaped fleece sections ( 21a . 21b . 21c ) and with strip-shaped metal sheets ( 19a . 19b . 19c . 19d ) is busy. Surface heat exchanger element ( 10 ) according to one of the preceding claims, characterized in that the carrier ( 12 ) is provided by a perforated metal sheet. Surface heat exchanger element ( 10 ) according to one of the preceding claims, characterized in that the panel ( 10 ) a substantially, with the exception of the holes ( 13 ), smooth underside ( 27 ), as well as raised side walls ( 14a . 14b . 14c . 14d ), providing a box or cassette shape. Cooling ceiling ( 11 ), comprising a plurality of surface heat exchanger elements ( 10 ) according to one of the preceding claims.

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