DE8911484U1 - Absorber device for a heat pump - Google Patents

Description

Absorber system for a heat pump with channels through which a heat transfer medium flows, in particular for installation on a roof surface

The innovation concerns an absorber system for a heat pump with channels through which a heat transfer medium flows, in particular for installation on a roof surface.

Such solar systems have become known in numerous designs. As far as is known, the only thing that is known is that the heat transfer medium flows in pipes. Examples include European Patent Specification 543 or European Patent Specification 6585. A similar state of the art is shown in European Patent Specification 36 041, where the pipes have a Ω-profile and their flat sides are placed against tubular casings.

Regarding the state of the art, reference should also be made to European Patent Specification 28 112, which describes a special profile for the formation of a solar panel. European Patent Specification 26 808 shows a roof covering or facade cladding with special fastening profiles.

The known absorber systems, in which the heat transfer medium flows in pipes, have the particular disadvantage of poor efficiency, because it is not possible to optimally use the entire surface illuminated by the sun to heat the medium in question. Installation is also difficult and in particular is not adapted to the shape of the roof surface, which results in the roof surface having an unsightly appearance.

It is also known to design such absorber systems with plastic pipes (PE pipes) that are black, which is reflected in the

Sails look unsightly on a red-tiled roof at night.

The statement is therefore based on the idea of proposing an absorber device of this type which is characterized in particular by a noticeably improved efficiency, whereby a special adaptation of the absorber device to the given spatial conditions should be possible, in particular when mounting on or on a roof surface. The installation should also _be easy and the device should satisfy all the requirements imposed in practice. To solve this problem, it is therefore provided in such an absorber device for a heat pump with channels through which a heat transfer medium flows, which are arranged in elongated profile elements which have ribs running in the longitudinal direction parallel to the channels, that the ribs running in the longitudinal direction are formed on the top of the profile elements parallel to one another over the entire width of the same, which form grooves in between which taper downwards, that the underside of the profile elements is essentially designed as a smooth surface and has fastening webs and that a U-profile with folds for engagement with the fastening webs of the profile elements is provided for fastening to the roof surface.

The special ribbing, which largely covers the surface of the individual profile elements, significantly increases the absorber surface exposed to solar radiation. The profile elements can be colored in the desired color, which also allows the device to be visually adapted to the environment or the color of the roof. The ambient heat (from the air, from rain, from diffuse light and from the sun) is absorbed by the new profile elements and heats them on the outer surfaces enlarged by the ribs. The heat absorbed here travels through the solid body of the profile elements and is absorbed by the heat transfer medium flowing through the channel. The temperature difference between the medium and the solid body ensures a constant flow of heat to the center, i.e. to the channel through which the heat flows or the pipes through which the heat flows inside the profile element body.

It is preferred here if the grooves formed between the ribs are tapered or narrowed downwards. This unacceptable measure not only ensures that the

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Not only does this prevent ice from forming, but because the ice cannot get stuck there once it has formed, the new system's good efficiency is maintained. Furthermore, this ensures that the bottom of the groove is fully illuminated by the sun, which also contributes noticeably to the desired increase in efficiency.

For the same reason, it is preferred if the ribs point outwards in a star shape. When the sun moves, the profile elements according to the invention therefore always present several of the grooves to the sun, which are therefore optimally illuminated and heated.

Furthermore, it is preferred if the cross-section of the profile elements is symmetrical, although this does not necessarily have to be the case. A symmetrical design of the profile elements offers advantages during assembly.

The underside of the Profi 1 elements can be smooth with fastening bars provided there, by means of which the Profi! elements can be attached at a distance to a fixed structural element, preferably to a roof. This ensures easy installation on the one hand and on the other hand the underside of the profile elements, which are made of solid and good heat-conducting material, can be brushed by air and also absorb heat from there.

For assembly, it is preferred if a U-profile with bevels is provided for fastening to the webs of the professional elements.

At the ends of the U-profiles, keyhole-shaped fastening holes can be provided in their base for fastening to a crossbeam. The U-profiles are pushed over corresponding fastening elements with heads of the crossbeams, which also makes it easy to accommodate changes in length.

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It is also preferred if the U-profiles are attached to the trusses using plastic profiles. This also ensures good insulation between the actual roof and the U-profiles or the profile elements that accommodate the heat transfer medium.

The trusses can be screwed to plastic tiles, which are then colored the same as the other tiles on the roof in question.

It should be mentioned that the absorber system according to the innovation is preferably suitable for installation on a roof surface. However, it can also be mounted on other building elements, for example walls, separate stands and the like, as is state of the art.

The innovation is described in more detail below using an example. This reveals further advantages and features of the innovation.

It shows:

Figure 1: a cross-section through a profile element after the innovation,

Figure 2: a view corresponding to Figure 1 with an additional U-profile1 for holding the profile element according to Figure 1;

Figure 3: a cross-section through a cross-beam for fastening the U-profiles according to Figure 2;

Figure 4: a view corresponding to Figure 3 with additional fastening elements provided;

Figure 5: a plan view of a U-profile with fastening;

Figure 6: a perspective view of a tiled roof with a cross profile and U-profiles attached to it;

Figure 7: a perspective view corresponding to Figure 6, showing the fastening of one of the cross profiles of a roof tile;

Figure 5: a view corresponding to Figure 5, with the lower connection shown at the top in Figure 8.

Figure 1 shows a profile element or absorber profile 1, which consists of a central tube 2 that extends through the entire length of the absorber profile. Such an absorber profile can reach lengths between 2 and 6 m.

The absorber profile 1 essentially consists of a central profile 3, which has a reinforced cross-section. For example, there is a distance 6 from the pipe 2 to the groove base 16 of the grooves 11, 12, 13, whereby only some of the grooves are mentioned as examples. It is important that due to the star-shaped arrangement of the ribs 7, 8, 9, 10 in the area of the central profile 3, the grooves 11, 12, 13 open outwards at an angle or in a star shape, so that, for example, light incident in the arrow directions 14 or 15 always leads to full irradiation of the entire groove, including the groove base 16 and the groove walls 11 and 18.

The fact that the grooves 10 to 13 open outwards in a wedge shape also ensures that any ice that may form during operation cannot jam and wedge in the groove 10 to 73, which would lead to a reduction in the efficiency of the absorber profile 1 and possibly also to damage.

In the edge profile 4,5, the grooves 19, 20, 21 are also directed obliquely outwards in order to achieve sufficient irradiation of the entire groove surface of the grooves 19 to 21 even when the light falls at an angle, for example in the directions of arrows 14 and 15.

Analogously, the ribs 22 to 24 are then directed obliquely outwards. The envelope curve 51, which touches the tips of the ribs 22 to 24, is thus gently rising from an outer edge region to the central profile, resulting in a continuous curve that rises steadily. This means that the height of the ribs rises from the outer edge region in the direction of the central profile 3.

The envelope curve 25 for the center profile is also a continuously curved curve that is approximately concentric to the tube 2.

On the underside 26 of the absorber profile Ir, two webs 27 pointing towards one another are formed, which define a receiving space 28 between them. This receiving space serves to insert bends 31 of a bending profile 29, which is shown in more detail in Figure 2.

The beveled profile 29 essentially consists of a U-profile which has side surfaces 30 pointing outwards at an angle and which have bevels 31 at their upper free ends which engage in the receiving spaces 28 of the webs 27 of the absorber profile 1.

This allows the bent profile 29 to be easily inserted onto the absorber profile 1. Once the bent profiles 29 have been inserted into the absorber profile 1 in the correct position, self-tapping screws are screwed into the struts 27 from below, which penetrate into the receiving space 28 and secure themselves to the bends 31 of the bent profile 29.

It is important that the side surfaces 30 of the bent profile 29 are inclined in the direction of the base leg 32 in order to ensure good load transfer from the absorber profile to the bent profile 29.

In the area of the base leg 32 of the bent profile 29, the fastening is carried out using transverse cross profiles 34, which are explained in more detail using Figures 3 and 4.

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The respective cross profile 34 extends parallel to the ridge direction (transverse to the roof surface), while the longitudinal axis of the absorber profile runs perpendicular to the ridge direction.

The cross profile 34 essentially consists of a straight U-profile with bent edges 36 bent inwards towards each other, onto which a plastic profile 35 is pushed. This plastic profile 35 has slots 37 that open outwards on the sides, into which the bends 36 engage. This allows the plastic profile 35 to be easily pushed onto the bends 36 of the cross profile 34. The purpose of this measure is to create thermal insulation between the bent profile 29 and the cross profile 34.

Another purpose is to avoid squeaking noises caused by the expansion of the absorber profile and possibly by the expansion of the beveled profile, because the beveled profile 29 can move relatively freely on the plastic profile 35. In addition, this eliminates rattling noises caused by wind and other environmental influences.

Figure 4 now explains how the cross profile is provided with corresponding mounting heads 38 in order to create a connection to the bent profile 29.

For reasons of simplification, the plastic profile 35 is no longer shown in Figure 4; however, it is also used in this embodiment according to Figure 4, so that it comes to lie between the mounting head 38 and the surface of the cross profile 34.

The mounting head 38 consists essentially of an aluminum turned part » which has an upper collar 39 of relatively large diameter, which is integrally connected to a collar 40 of smaller diameter which in turn is connected to a collar 41 of larger diameter

which has the same diameter as the upper collar 39.

This creates a groove 42 between the collar 39 and 41, which groove serves to insert the recesses 43-44 in the base leg 32 of the bent profile 29.

In Figure 5, a keyhole-shaped groove is arranged in the base leg 32 of the folded profile 29, with a larger, round-profiled recess 44 adjoining an elongated recess 43 of reduced width.

The diameter 46 of the recess 44 is slightly larger than the diameter 46 of the mounting head 38, so that for mounting the mounting head 38 is first guided through the recess 44. With further displacement the groove 42 thus reaches the area of the recess 43 and then reaches its final mounting position, as shown in Figure 5.

It should be mentioned that the mounting head 38 is fastened to the cross profile 34 with a screw 45.

It is important here that the folded profile 29 forms a receiving space 33 into which the connecting pipe 52 for the absorber engages.

This is achieved by connecting the connecting pipe 52 to the pipe 2 of the absorber profile 1 according to Figure 2 via an angle head 53. The particular advantage of this measure is that the connecting pipes 52 are thereby protected and above all protected from snow loads and other unfavorable influences, whereby the connecting pipes 52 then run parallel and are guided into a cross pipe, which is not shown in the drawing. This cross pipe is the collecting pipe for the heat transfer medium.

In order to protect this junction in the area of the aforementioned pipes against environmental influences, it is intended that the upwardly open bevelled profile, which protrudes about 20 cm below the absorber profile, is covered by an upper cover plate4, which cover plate is attached with screws to the bevels 31 of the absorber profile ta . This results in a perfect, aesthetic appearance and optimal protection of all connecting pipes.

Figure 6 shows the fastening of the folded profiles 29 to the transverse cross profile in the 34» '."id as the upper fastening of the absorber profile near the ridge.

Here you can see that only the edge profiles are pushed onto the mounting heads 38 and then moved downwards to ensure a perfect fastening.

It is important that only a single fastening point is necessary, because the required anti-twisting security is achieved by the absorber profile itself. This type of assembly process takes place within minutes.

Figure 7 shows the fastening of the cross profile 34 to a roof surface. It can be seen that a bracket 49 is screwed to the lower edge of the cross profile 34, which bracket 49 is welded to a plate 48 and the plate 48 is in turn screwed to a plastic tile 47. The plastic tile 47 replaces an existing roof tile on site, whereby the tile 47 corresponds exactly to the existing tile on site in terms of its color and shape, so that no difference can be detected.

Figure 8 shows the lower fastening of a bent profile 29, whereby it can be seen that here not a mounting head 38 is used, but a simple screw 50 with a corresponding screw head, which reaches through the recess 43 and is larger than the recess 43

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This ensures that when the absorber profile is suspended, the upper bent profile 29 can move relative to the lower bent profile ²⁹ in the area of this recess 43. The screw 50 on the one hand is thus freely movable relative to the lower bent profile 29 and the mounting head 38 on the other hand can also be moved freely in the recess 43 of the respective bent profile 29. This makes longitudinal expansion possible, with the sliding properties being further improved by the plastic insert 35 underneath.

In summary, it can be stated that an excellent level of efficiency is achieved with such an absorber system, so that only a relatively small roof area is required, that the absorber profile is made of an aluminum alloy, that it can easily be surface-coated, whereby the color of the surface coating can be adapted to the color of the roof in any way.

From a greater distance, the absorber system can no longer be distinguished from the roof surface itself; moreover, the absorber system is mounted on the roof surface and not in the roof surface, which avoids condensation problems in the roof area.

An air space that forms between the underside of the absorber system and the top of the roof is also used to absorb heat. This means that the underside of the absorber surface is also suitable for absorbing heat and, with appropriate air movement, heat transfer is significantly improved.

In the same way as the installation on a roof surface was described, it is of course also possible to install it on vertical surfaces, such as walls and the like. A free-standing installation is also provided.

Such an absorber system is suitable for single-family and multi-family houses

- 13 are suitable, although large systems are also possible.

Tests have shown that an absorber package covering a roof area with a length of 5.90 m and a width of 1.50 m heated a 1 1/2 family home on around 300 days a year, including hot water preparation.

The effective absorber area was 41.30 square meters. The output was between 4.9 and 20 kilowatts.

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DRAWING LEGENOE

1 absorber profile 25 Envelope curve 50 Screw 2 pipe 26 Bottom 51 Envelope curve 3 Medium profile 27 Bridge 52 Connection pipe 4 Edge profile 28 Recording room 53 Angle head 5 " 29 Bending profile 6 Distance 30 side area 7 Rib 31 Bending 8 Rib 32 base legs 9 " 33 Recording room 10 " 34 Cross section 11 Groove 35 plastic profile 12 grooves 36 Bending 13 Groove 37 Slot 14 Arrow direction 38 Mounting head 15 Arrow direction 39 Bund 16 Groove base 40 " 17 Groove wall 41 " 18 Groove wall 42 groove 19 grooves 43 Recess 20 grooves 44 Recess 21 groove 45 Screw 46 diameter 22 Rib 47 bricks 23 Rib 48 Plate 24 Rib 49 brackets

Claims (5)

10 15 (New) protection claims 1. Absorber device for a heat pump with channels through which a heat transfer medium flows, which are arranged in elongated profile elements made of a material that conducts heat well, whereby the profile elements, which are intended in particular for installation on a roof surface, have ribs that run longitudinally parallel to the channels, characterized in that the ribs (7,8,9,10:22,23,24) that run longitudinally are formed on the top of the profile elements (1) so as to lie parallel next to one another over the entire width of the same, which form grooves (11,12,13:19,20,21) in between, which taper downwards, that the underside (26) of the profile element (1) is essentially designed as a smooth surface and has fastening webs (27) formed thereon, and that a U-profile (29) with bevels (31) for fastening to the roof surface is provided. engagement with the fastening webs (27) of the profile elements (1) is provided. 20 2. Absorber device according to claim 1, characterized in that the groove base (16) of the grooves (11, 12, 13) formed around the pipe (2) through which the heat transfer medium flows is equidistant from the wall of the pipe (2) and the groove base of the grooves (19, 20, 21) adjoining on both sides across the width of the profile elements (1) is equidistant from the underside (26), wherein in the profile cross-section O Telephone: «Undau (083 82) 78025 Tdex: 54374(patent-d) email address: patri-nndau Facsimile/Fax: +49-8382-78027 Bank accounts: Postal checking account Bayer. VtereinsbanK Lindau (B) No. 1257110 (bank code 735 200 74) Munich 414 848-808 rtypo-Bank Undau (B) No. 66 70-326 843 (bank code 733 204 42) (bank code 70010080) {feftstftnk Liiidap (B) No. 51 222 000 (bank code 735 9C1 20) · ■ · · · I I B · · the height of the ribs (7,8,9,10) is determined by an envelope curve (25) leading into a radius around the center of the channel or pipe (2) and the height of the ribs (22, 23,24) adjoining on both sides is determined by an envelope curve (52) sloping across the width of the profile (1) towards the ends. 3. Absorber device according to claim 1, characterized in that keyhole-shaped fastening holes (43, 44) are provided at the ends of the U-profiles (29) in their base for fastening to a cross member (34). 4. Absorber device according to claim 3, characterized in that the U-profiles (29) are attached to the cross members (34) via plastic profiles (35). 5. Absorber device according to claim 3 or 4, characterized in that the cross members (34) are screwed to plastic tiles.