HEAT STORAGE

Description

[0001] The present disclosure comprises a heat storage device, for example for heating support and / or domestic hot water heating, with a container and a heat exchanger arranged therein.

[0002] Heat exchangers are used to transfer thermal energy from one medium to another. They are used, for example, in heating, ventilation, and / or air conditioning systems. A heat exchanger typically consists of a pipe through which a heat transfer medium flows, often arranged in a spiral around an axis. Such a heat exchanger can be a component of a thermal storage system, which is used, for example, to support heating and / or domestic hot water production.

[0003] The heat exchanger is typically located inside the thermal storage tank and serves to facilitate heat exchange between the heat transfer medium flowing through the piping and a heat storage medium held inside the tank. The heat exchanger piping is often mounted on a support frame, which is typically located inside the thermal storage tank and holds the piping in the desired position.

[0004] A heat storage device of this type is known from DE 10 2015 100 227 A1. Further heat storage devices are known from CN 205 561 271 U, EP 1 835 214 A1 and WO 2016 / 020893 A1.

[0005] The task is to propose a concept for a support frame for a heat storage system of the type described above, which is suitable as a support for a pipe of a heat exchanger of the heat storage system.

[0006] The problem is solved with a heat storage device which has the features of claim 1.

[0007] Advantageous embodiments and / or configurations and / or aspects of the invention will become apparent from the dependent claims, the following description and the figures.

[0008] A heat storage system is proposed, suitable for use in heating support and / or domestic hot water heating. The heat storage system comprises a container designed to hold a liquid heat storage medium. The system also includes a heat exchanger located within the container.

[0009] The heat exchanger comprises a support frame and an attached pipe through which a heat transfer medium can flow. The heat transfer medium can be a liquid, in particular an aqueous liquid or water. For example, the heat exchanger is positioned inside the container using the support frame. The support frame, along with the attached heat exchanger pipe, can also be removed from the interior.

[0010] With regard to the heat storage device and / or the container, reference is made to the German patent application with the official file number DE 10 2021 101 633.9 for the purpose of completing and supplementing the present disclosure, with the note that this application may assign a meaning to any identical terms that differs from the meaning in the present disclosure.

[0011] The support frame comprises several elongated retaining elements. These retaining elements extend longitudinally along a spatial axis, in particular a common spatial axis. For example, the retaining elements are arranged parallel or substantially parallel to each other with respect to their longitudinal extent.

[0012] The retaining elements have multiple or numerous connection points for the pipeline. This allows the pipeline to be held in a desired position. It also allows the pipeline's path to be maintained in a desired shape, especially if the pipeline is flexible, such as a corrugated pipe.

[0013] The connection points, in particular the connection points of at least one of the retaining elements or the connection points of each individual retaining element, are arranged one behind the other when viewed in the direction of the longitudinal extent of the retaining elements. For example, the connection points of one of the retaining elements are offset from each other in the direction of their longitudinal extent or in the direction of the spatial axis relative to the connection points of another retaining element. This ensures that the pipeline, at least over a length segment, is formed and / or held in a helical shape around and extending in the direction of the spatial axis, i.e., a cylindrical spiral shape.

[0014] According to the invention, at least one of the retaining elements is made of or consists of wood. It has been shown that using wood as the material for the at least one retaining element facilitates achieving the desired high stiffness and / or strength of the support frame. Furthermore, it has been shown that the use of wood allows the support frame to be built relatively lightweight. This is due, for example, to the fact that wood has a favorable strength-to-weight ratio.

[0015] Furthermore, it has been shown that using wood as a material for the support frame promotes the damping of mechanical vibrations. Such vibrations can be caused by the pipeline connected to the support frame and, for example, result from a sudden flow of the heat transfer medium through the pipeline. These vibrations often manifest themselves as a vibration of the pipeline. It has been observed that the favorable damping properties of wood, which are due, for example, to its fiber structure, have a positive effect on the damping behavior of the support frame and counteract the vibrations of the pipeline.

[0016] The wood material can be hardwood, such as deciduous trees, or softwood, such as coniferous trees. For example, the wood material might be oak, acacia, robinia, chestnut, or poplar.

[0017] In one embodiment, the wood material is poplar or consists of poplar wood. It has been found that poplar wood possesses favorable properties for use as a component of the support frame or for forming the support frame itself. This is due, for example, to the fact that poplar wood, particularly in the transverse direction, exhibits relatively low swelling and / or shrinkage. Furthermore, poplar wood has a relatively low density, so a support frame made from it is relatively lightweight. Another positive aspect is the low knot count of poplar wood, which contributes to the high stability of the support frame.

[0018] In one possible embodiment, the wood material is solid wood, or consists of solid wood. In the present disclosure, the terms "solid wood" or "solid wood" are understood to mean, in particular, wood whose cross-section has been machined from a tree trunk and optionally by subtractive machining. Preferably, no further processing has yet been carried out. As a result, the original structure of the tree trunk remains unchanged or largely unchanged in the solid wood; that is, it has not been, or has been substantially, mechanically or mechanochemically altered. Since the wood material is solid wood, the manufacturing of the support frame, in particular the at least one retaining element, is therefore facilitated in a technically simple manner and / or at low cost, while retaining the positive properties of wood described above with regard to the support frame.

[0019] Additionally or alternatively, the wood material may comprise or consist of glulam or a wood-based material. In the present disclosure, the term "glulam" refers in particular to a wood material comprising at least two or three layers of wood boards, preferably arranged with the same grain direction and glued together. In particular, adjacent wood boards are glued together. Gluing is understood to mean joining by means of an adhesive, such as wood glue and / or a hot melt adhesive, in particular a waterproof adhesive.

[0020] In this disclosure, the term "wood-based material" refers in particular to a wood material formed by crushing wood, such as solid wood, and subsequently joining the resulting wood particles together. The wood particles may be bonded together with or without binders or mechanical connections. The term "wood-based material" specifically includes wood-based particleboard, such as wood-based panels or particleboard, or wood-fiber-based materials, such as fiberboard, or composite materials, such as wood-polymer composites (WPC).

[0021] In particular, it is provided that the wood material has a grain direction extending in the direction of the longitudinal extent of the at least one support element. This facilitates the achievement of the desired high stiffness and / or strength of the support frame. In the present disclosure, the term "grain direction" refers in particular to the direction of the grain flow in the wood. The grain direction preferably runs in the axial direction, i.e., parallel or substantially parallel to the axis of the wood.

[0022] In a further embodiment, at least one of the connection points of the at least one retaining element is formed on the at least one retaining element, in particular molded or integrally formed. This facilitates a technically simple manufacturing of the at least one connection point, since the at least one retaining element is used directly for this purpose. Separate functional parts for forming the at least one connection point can be eliminated.

[0023] By providing at least one connection point on the at least one support element, it is possible for the pipe to be connected to the wooden material of the support element. In this way, the pipe can come into contact with the wooden material of the support element. If, for example, the pipe is made of stainless steel or contains stainless steel components, and steel components are installed in the support frame, this prevents potential corrosion, as the wooden material acts as an insulator.

[0024] One possible embodiment consists in the at least one connection point and / or at least one of the connection points of the at least one retaining element having or being formed from a hole in the wood material, for example, to connect the pipeline, in particular directly and / or immediately, or via a fastening element. This facilitates a technically simple manufacturing of the at least one connection point on the at least one retaining element, since only the hole needs to be provided. The hole also facilitates a technically simple assembly of the pipeline on the at least one retaining element. In particular, the hole is formed by a recess in the material. For example, the hole is a bore.

[0025] The fastening element can be a separate component. For example, the fastening element is designed to hold the pipe and / or to attach the pipe to it, with the fastening element itself being, for example, connected to the hole.

[0026] Preferably, the wood material is dried and has a predetermined moisture content or falls below a predetermined moisture content, for example, when the pipe is mounted on the support frame. In one possible embodiment, the hole has a clear opening dimensioned to accommodate the pipe or the fastening element for the pipe, in particular to accommodate it with some play, and to exert a clamping force on the pipe as the wood swells. In particular, the swelling of the wood secures the pipe or the fastening element firmly in the hole, thus preventing it from moving out. This allows for a technically simple fastening of the pipe to the at least one retaining element, as it utilizes the property of wood swelling.

[0027] In this disclosure, the terms "swelling" or "expansion" refer specifically to the property of wood to absorb liquid, thereby increasing its volume. Similarly, wood shrinks when it dries. In this disclosure, the term "shrinkage" refers specifically to the property of wood to decrease in volume when it loses liquid, i.e., when it dries.

[0028] In another embodiment, the hole is designed to extend in the direction of an axis, which runs transversely to the spatial axis. This axis can therefore also be referred to as the hole axis. In particular, the hole is designed to be a through hole. Furthermore, the through hole is designed to have a passage through the at least one retaining element that extends tangentially and / or transversely to the spatial axis, for example, to accommodate the pipeline. This allows the pipeline to be arranged on the support frame in such a way that the helical shape described above is formed. The hole can also be a blind hole.

[0029] In a further embodiment, the hole or through-hole is open on a side facing radially and / or transversely outwards or inwards with respect to the spatial axis, and in particular has an insertion opening there, for example to allow the pipeline to be inserted longitudinally into the through-hole by moving it radially or transversely with respect to the spatial axis. This facilitates the mounting of the pipeline on the support frame, since the pipeline can be inserted laterally through the insertion opening into the hole or through-hole, thus avoiding the need for complex threading into the hole or through-hole in the axial direction, i.e., in the direction of the hole axis.

[0030] It can further be provided that at least one retaining element is associated with a preferably separate locking element, which at least partially closes the insertion opening, for example to secure the pipeline against being moved out through the insertion opening. For example, the locking element is elongated. The locking element can be strip-shaped or rod-shaped. For example, the locking element has a cross-section that is uniform in the direction of its longitudinal extent. For example, the locking element is a wooden strip.

[0031] In particular, the locking element comprises or consists of wood or the wood material described above. The locking element can also be a plastic component. In this disclosure, the term "plastic component" means a component that comprises or consists of a plastic material. Alternatively, the locking element can also be a metal component. In this disclosure, the term "metal component" means a component that comprises or consists of a metal material.

[0032] In one possible embodiment, the locking element is arranged on the at least one retaining element, in particular in a detachable manner. Specifically, a receptacle is arranged on the at least one retaining element, in particular a shaped recess into which the locking element is inserted, covering the insertion opening. This allows the locking element to be easily brought into its locking position with respect to the hole or through-hole.

[0033] For example, the insertion recess is formed by a depression extending transversely to the axis and in the direction of the spatial axis in the at least one retaining element, in particular in the wooden material of the at least one retaining element. This allows the locking element to be inserted laterally, in particular the locking element to be inserted along its longitudinal axis.

[0034] For example, the insertion recess is designed as a dovetail joint, and the locking element or a plug-in section of the locking element forms a dovetail joint with the recess. In particular, the dovetail joint ensures that the locking element is positively locked in the insertion recess against movement transversely to the axis and in the direction of the insertion opening.

[0035] Alternatively, the insertion recess can be formed by a depression extending transversely to the axis and transversely to the spatial axis in the at least one holding element, in particular in the wooden material of the at least one holding element.

[0036] In a further or different embodiment, the at least one retaining element is formed in at least two parts and comprises at least two individual parts which are designed to be connected to one another. In particular, each individual part preferably has a circumferential section of the hole formed. In particular, it is provided that the respective circumferential section encompasses, and in particular partially encompasses, the outer circumference of the pipeline.

[0037] The two-part design of the retaining element allows for easy assembly of the pipeline to at least one retaining element, for example by inserting the pipeline into the circumferential section of the hole of one part and then mounting the other part onto the first part, with the circumferential sections of the parts forming the inner circumference of the hole and the pipeline then being located therein.

[0038] The individual parts can be fastened to one another by fasteners, in particular separate fasteners. These fasteners could be, for example, screws, nails, or the like. Additionally or alternatively, the individual parts can be bonded together by adhesive.

[0039] It is also possible, in principle, for one of the individual parts to have a recess and the other part to have a plug-in section that can be inserted into the recess. For example, the recess and the plug-in section are designed to form a dovetail joint or tongue-and-groove joint, for instance, to connect the individual parts by creating the hole or through-hole. For example, each individual part may have a circumferential section of the hole or through-hole.

[0040] In another embodiment, the support frame includes a mounting surface for placement on a substrate. In particular, the mounting surface is associated with a longitudinal end or end region of the mounting elements. Specifically, the mounting elements extend vertically along their longitudinal axis and / or their spatial axis is a vertical axis. This allows the pipeline to be mounted on the support frame with a vertical orientation, for example, by the helical shape of the pipeline surrounding the spatial axis oriented vertically. This orientation of the pipeline enables heat exchange, which can influence temperature stratification in a heat storage system.

[0041] The support frame comprises at least one crossbeam by which the retaining elements are connected to one another to form a freestanding assembly. The at least one crossbeam can be made of wood or the wood material described above. For example, the connector is ring-shaped, particularly a closed ring-shaped one. This provides an advantage in terms of stability.

[0042] One possible embodiment consists of the pipeline comprising or being composed of a corrugated pipe. In the present disclosure, the term "corrugated pipe" refers in particular to a pipeline with a corrugated diameter that varies in shape and is flexible due to the corrugation. The corrugated pipe may be a metallic corrugated pipe. For example, the corrugated pipe may be made of or consist of stainless steel. In principle, the corrugated pipe may also be made of or consist of a plastic material. In the present disclosure, the term "corrugated pipe" also includes a corrugated hose.

[0043] In a further embodiment, the heat storage container comprises a wooden material that at least partially forms the interior of the container. The wooden material can be the one described above. In particular, the container is at least partially cylindrical and comprises a side wall extending around a central axis, a bottom wall, and a top wall, which surround and / or define the interior.

[0044] In another embodiment, the side wall comprises a plurality of elongated wall elements. In particular, the wall elements extend longitudinally in the direction of the central axis, with adjacent wall elements lying abutting each other lengthwise. For example, the container is designed as a barrel-like wooden container with a wooden body containing the wood material, which comprises a plurality of staves. For example, the staves form the side wall of the container, or the side wall comprises the staves.

[0045] In the present disclosure, the term "stave" refers in particular to a solid piece of wood which is split along the natural grain of the wood and preferably dried to a predetermined moisture content. Preferably, the stave is formed into a curved shape, for example, by a steam bending process.

[0046] Further details and features will become apparent from the following description of several exemplary embodiments with reference to the drawing. These show Fig. 1 shows a heat exchanger of a possible embodiment of a heat storage device with a support frame and a pipe attached to it in a perspective view; Fig. 2 shows the support frame of the Figure 1 in a perspective view, Fig. 3 the support frame of the Figure 2 In another perspective view, Fig. 4, a holding element of the support frame of the Figures 2 and 3 In an exploded view, Fig. 5, an enlarged section of the retaining element of the Figure 4 In a perspective view, Fig. 6 shows an enlarged section of the holding element of the Figure 4 In another perspective view, Fig. 7 shows a support frame of another possible embodiment of the heat storage unit, Fig. 8 shows a holding element of the support frame. Figure 7in a side view, Fig. 9 an enlarged section of the retaining element of the Figure 8 in an exploded view and Fig. 10 a further embodiment of a heat storage device in perspective view.

[0047] Figure 1 Figure 1 shows – in a schematic representation – a heat exchanger 100 of a possible embodiment of a heat storage device in a perspective view from the front. The heat storage device has a container which is designed to hold a liquid heat storage medium in its interior. The heat exchanger 100 is arranged inside the container.

[0048] The heat exchanger 100 comprises a pipe 50, which is designed to carry a heat transfer medium. The pipe 50 is designed, for example via its pipe wall, to effect heat exchange between the flowing heat transfer medium and a heat transfer medium and / or heat storage medium surrounding the pipe.

[0049] Preferably, the pipeline 50 has a connection point 52 or 53, for example at its opposite ends, for example to connect to a (in the Figure 1 (not shown) to be connected to the piping system. The heat transfer medium can flow into the pipe 50 via one of the connection points 52, 53 and can flow out of the pipe 50 via the other connection point 52 or 53.

[0050] The heat transfer medium can be a fluid, in particular a gas, or a liquid, such as water. The pipe 50 can be a corrugated pipe, in particular a metallic corrugated pipe. For example, the corrugated pipe may be made of or consist of stainless steel or a stainless steel alloy. The connection points 52, 53 can have a screw connection or be designed as a screw connection. Alternatively, the connection points 52, 53 can have a weld / braze connection or be designed as a weld / braze connection.

[0051] The heat exchanger 100 comprises a support frame 1 for the pipeline 50. The support frame 1 includes several, for example, three retaining elements 2, 3, 4. For example, at least one of the retaining elements 2, 3, 4 is designed as a strip or beam. The retaining elements 2, 3, 4 are configured to hold the pipeline 50. The retaining elements 2, 3, 4 each extend with their longitudinal extent in the direction of a spatial axis y, in particular a common spatial axis y. For example, the retaining elements 2, 3, 4 are arranged parallel or substantially parallel to each other with respect to their longitudinal extent. The retaining elements 2, 3, 4 each have several or a plurality of connection points 5 for the pipeline 50 in order to hold, in particular to fasten, the pipeline 50.

[0052] Viewed in the direction of the longitudinal extension of the retaining elements 2, 3, 4, the connection points 5 are arranged one after the other in such a way that the pipeline 50 is held in a predetermined orientation or position. Viewed in the direction of the longitudinal extension of the retaining elements 2, 3, 4, the connection points 5 are arranged one after the other in such a way that the pipeline 50 is held, at least over a length segment, in a helical shape 51 extending around and in the direction of the spatial axis y, in particular wound or coiled helically around the spatial axis y.

[0053] Preferably, the support frame 1 comprises a mounting surface 15 for placement on a (in the Figure 1 (not shown) substrate. For example, the mounting surface 15 is assigned to a longitudinal end 16 or end area of ​​the retaining elements 2, 3, 4, and is formed in particular there. It is also possible that the support frame 1 is a (in the Figure 1 (Not shown) foot element, in particular a separate foot element, on which the mounting surface 15 is formed. For example, at least one of the retaining elements 2, 3, 4 rests on and / or is attached to the foot element.

[0054] Figure 2 shows, for example, the support frame 1 of the Figure 1 in a perspective view from the front. Figure 3 shows, for example, the support frame 1 of the Figure 1 in a perspective view from above. As can be seen in particular from the Figures 2 and 3As can be seen, the support frame 1 has at least one, preferably two or three, cross connectors 17, 18, 19 for connecting the retaining elements 2, 3, 4. Preferably, at least one of the cross connectors 17, 18, 19 is connected to at least two of the retaining elements 2, 3, 4. For example, the retaining elements 2, 3, 4 are preferably each attached to at least one of the cross connectors 17, 18, 19. Fastening elements, in particular separate fastening elements such as screws, can be used for this purpose.

[0055] Preferably, at least two of the cross connectors 17, 18, 19 are arranged one behind the other at a distance from each other, viewed in the direction of the spatial axis y. The cross connectors 17, 18, 19, together with the retaining elements 2, 3, 4, form a composite structure. The composite structure is designed to be stable enough that the support frame 1 can be freely erected, wherein, for example, the retaining elements 2, 3, 4 extend with their longitudinal extent in a vertical direction or substantially in a vertical direction and / or the spatial axis y is a vertical axis.

[0056] Preferably, at least one of the cross connectors 17, 18, 19 is annular and / or forms a ring, in particular a closed ring, circumferential around the spatial axis y. Preferably, the at least one cross connector 17, 18, or 19 has a surface structure extending in the direction of the spatial axis y and / or a surface structure extending transversely to the spatial axis y.

[0057] Preferably, at least one cross connector 17, 18, or 19, or at least one of the cross connectors 17, 18, 19, has a longitudinal section 20.1, 20.2, or 20.3 extending transversely to the spatial axis y, in particular a longitudinal section, which is connected at its opposite longitudinal ends or end regions to one of the retaining elements 2, 3, 4. Preferably, at least one of the cross connectors 17, 18, 19, or the at least one cross connector 17, 18, or 19, is a metal part that comprises or consists of a metallic material, such as stainless steel.

[0058] As can be seen particularly from the Figures 2 and 3As can be seen, the retaining elements 2, 3, 4 can be arranged such that the connection points 5 are located radially outside with respect to the spatial axis y. For example, the retaining elements 2, 3, 4 are arranged radially outside on the at least one transverse connector 17, 18, or 19, respectively. In this case, the support frame 1 is located within an interior area 54, which is formed by the preferably helical course of the pipe 50, as shown, for example, in the Figure 1 as is evident.

[0059] Alternatively, the retaining elements 2, 3, 4 can be arranged such that the connection points 5 are located radially inside with respect to the spatial axis y. For example, the retaining elements 2, 3, 4 are arranged radially inside the at least one cross connector 17, 18, or 19, respectively. In this case, an embodiment not shown in the figures is present in which the support frame or the retaining elements 2, 3, 4 surround the preferably helical course of the pipeline 50, i.e., viewed in the direction of the spatial axis y, the pipeline is at least partially arranged between the retaining elements 2, 3, 4.

[0060] The support frame 1 comprises or consists of wood. At least one of the retaining elements 2, 3, 4 comprises or consists of such wood. Additionally or alternatively, the at least one cross connector 17, 18, or 19 may comprise or consist of wood. The wood material of the at least one retaining element 2, 3, or 4 may be identical to or different from the wood material of the at least one cross connector 17, 18, or 19. Preferably, the wood material is solid wood. Preferably, the wood material is dried. For example, the wood material has a predetermined moisture content or is below a predetermined moisture content.

[0061] Alternatively, the wood material can be a wood-containing composite material, such as a wood-plastic composite (WPC). The wood-containing composite material can also be a concrete material with wood fibers. Preferably, the wood material contains or consists of hardwood, such as deciduous trees, or softwood, such as coniferous trees. For example, the wood material contains or consists of oak, acacia, robinia, chestnut, or poplar wood.

[0062] Figure 4 shows, as an example, one of the retaining elements 2, 3, 4, in particular retaining element 2. Figures 5 and 6Each figure shows an enlarged section of a region of a longitudinal end of one of the retaining elements 2. As can be seen from this, at least one of the connection points 5 can be formed, in particular shaped, on the retaining element 2. For example, the at least one connection point 5.1 has a hole 6 or is formed from one in order to connect the pipe 50 ( Figure 1 ) to be installed. For example, the hole 6 is present in the wood material or is formed in the wood material by means of a material recess. Preferably, the hole 6 extends in the direction of an axis 21, wherein the axis 21 is transverse to the spatial axis y ( Figure 2 ) of the support frame 1.

[0063] Hole 6 has a clear width w, which is dimensioned, for example, such that the pipe 50 ( Figure 1) for example, it can be accommodated with play, and if the wood material swells, a resulting clamping force acts from the edge of the hole 6 onto the pipe 50. The clear width w refers in particular to the dried state of the wood material, which is present, for example, during the manufacture of the support frame 1 or the manufacture of one of the retaining elements 2, for example, when the hole 6 is made and / or the pipe 50 is mounted on the support frame 1.

[0064] If the support frame 1 is located within a liquid-filled heat storage tank as part of the heat exchanger, the liquid causes the wooden material of the support frame 1 to swell. This narrows the hole 6, and the edge of the hole 6 presses against the pipe 50, exerting the clamping force described above. This clamping force can cause the pipe 50 to be held firmly in the hole 6.

[0065] Alternatively, the clear width w can be dimensioned such that the pipe 50 ( fits into hole 6 Figure 1 ) for example, it can be taken up with play and when the wood material swells, the pipe 50 remains loosely held in the hole 6, so that no clamping force is created.

[0066] Preferably, the hole 6 is a through hole 6.1. Preferably, the axis 21 is the central axis of the through hole 6.1. Preferably, the through hole 6.1 has a passage 7 through the retaining element 2 extending tangentially and / or transversely with respect to the spatial axis y, in order to allow the pipe 50 ( Figure 1 ). For example, hole 6 or through hole 6.1 is a bore or through hole drilled into the wood material.

[0067] Preferably, the hole 6 or through-hole 6.1 has a cross-sectional contour that corresponds to, or substantially corresponds to, the cross-sectional contour of the pipeline 50. For example, if the pipeline 50 has a round, in particular circular, cross-section, the hole 6 or through-hole 6.1 has a cross-section that has a round, in particular circular, contour, at least over a circumferential section, and in particular a corresponding round or circular contour.

[0068] Preferably, the through-hole 6.1 is open over a section of its circumferential wall or has an insertion opening 8 there, so that the pipe 50 can be inserted longitudinally into the through-hole 6.1 by a movement in the radial direction with respect to the spatial axis y and / or in the radial direction with respect to the axis 21. Preferably, the insertion opening 8 comprises two opposing wall surfaces 22, 23, which, for example, laterally delimit the insertion opening 8. Preferably, the wall surfaces 22, 23 adjoin the circumferential wall of the through-hole 6.1 and, for example, form an access channel to the through-hole 6.1. Preferably, the wall surfaces 22, 23 run parallel to each other, or at least substantially parallel to each other, over at least a section.

[0069] To secure the pipe 50 against being moved out through the insertion opening 8, a locking element 9, in particular a separate locking element 9, can be assigned to the retaining element 2. For example, the locking element 9 is attached to the retaining element 2 and at least partially closes the insertion opening 8, as can be seen in particular from the Figure 5 is evident. In the Figure 6 The retaining element 2 is shown without the locking element 9. In the Figure 4 The retaining element 2 and the locking element 9 are shown in an exploded view.

[0070] For example, the locking element 9 is elongated, in particular strip-shaped or rod-shaped. For example, the locking element 9 is a wooden component that has or consists of wood. The wood material can be the wood material described above. The wood material can be identical to the wood material of the at least one retaining element 2, 3, or 4. In principle, the locking element 9 can also be a plastic component or a metal component. For example, the locking element 9 has a uniform or substantially uniform cross-section extending in the direction of its longitudinal extent. Preferably, the locking element 9 extends with its longitudinal extent over at least several of the connection points 5, for example, to perform its locking function with regard to the pipeline 50.

[0071] The locking element 9 can be attached to the retaining element 2 via a plug connection. For this purpose, the retaining element 2 can have a receptacle 10 into which the locking element 9 is inserted, for example, via a corresponding plug section 11 or track section, covering the insertion opening 8. Preferably, the receptacle 10 is formed on the retaining element 2, in particular on the wooden material of the retaining element 2. Preferably, the receptacle 10 is formed by a recess on the retaining element 2, in particular on the wooden material of the retaining element 2, extending transversely to the axis 21 and in the direction of the spatial axis y. This allows the locking element 9 to be inserted laterally into the insertion opening 8.

[0072] For example, the retaining element 2 is shaped like a strip, plank, or board. For example, the retaining element 2 has a longitudinal side 24 and an end face 25 or transverse side arranged transversely to it. For example, the insertion opening 8 is arranged on the longitudinal side 24. Furthermore, for example, a recess is arranged on the end face 25 which extends longitudinally, i.e., in the longitudinal direction of the retaining element 2. Preferably, the recess extends in such a way that the inserted locking element 9 at least partially blocks the insertion opening 8.

[0073] Preferably, the plug-in section 11 is integrally formed on the locking element 9 and / or formed by the locking element 9. Preferably, the insertion receptacle 10 and the plug-in section 11 are designed such that the plug connection forms a dovetail joint 12. This ensures, for example, that the locking element 9 is positively locked to the retaining element 2 transversely to the axis 21 and / or transversely to the spatial axis y, in particular the insertion direction for the pipe 50 formed by the insertion opening 8.

[0074] Figure 7 Figure 1 shows a support frame 1' of another embodiment of the heat storage unit in a perspective view from the front. Components of the support frame 1' of the Figure 7 , which are connected to components of the support frame 1 of the Figure 2 Components that are identical in construction or function are marked with the same reference numerals; in this respect, reference is made to the description of support frame 1 of the Figure 2 referred.

[0075] The support frame 1' of the Figure 7 has several elongated retaining elements 2', 3', 4'. For example, at least one of the retaining elements 2', 3', 4' is designed in the shape of a strip or beam. The retaining elements 2', 3', 4' are installed, the pipeline 50 ( Figure 1 ) to hold. The retaining elements 2', 3', 4' extend with their longitudinal extent in the direction of the spatial axis y. The retaining elements 2', 3', 4' each have several or a plurality of connection points 5' for the pipe 50 in order to hold the pipe 50, in particular to fasten it.

[0076] Viewed in the direction of the longitudinal extension of the retaining elements 2', 3', 4', the connection points 5' are arranged one after the other in such a way that the pipe 50 is held in a predetermined orientation or position. Viewed in the direction of the longitudinal extension of the retaining elements 2', 3', 4', the connection points 5' are arranged one after the other in such a way that the pipe 50, at least over a length segment, is in a helical shape 51 extending around and in the direction of the spatial axis y ( Figure 1 ) is held, in particular is wound or coiled in a helical shape around the spatial axis y.

[0077] Preferably, at least one of the retaining elements 2', 3', 4', in particular the retaining element 2', has at least one of the connection points 5' on the at least one retaining element 2' or 3' or 4', for example on the retaining element 2', formed, in particular shaped. Figure 8The figure shows, as an example, one retaining element 2' in a side view. Figure 9 shows an enlarged section from an area of ​​a longitudinal end of one retaining element 2'.

[0078] For example, at least one connection point 5.1' has a hole 6' or is formed from one in order to connect the pipeline 50 ( Figure 1 ) to be installed. For example, the hole 6' is present in the wood material or is formed in the wood material by means of a material recess. Preferably, the hole 6' extends in the direction of an axis 21', wherein the axis 21' is perpendicular to the spatial axis y ( Figure 2 ) of the support frame 1' runs.

[0079] Preferably, the hole 6' is a through hole 6.1'. Preferably, the axis 21' is the central axis of the through hole 6.1'. Preferably, the through hole 6.1' has a passage 7' through the retaining element 2' extending tangentially and / or transversely with respect to the spatial axis y, in order to accommodate the pipe 50 ( Figure 1). For example, the hole 6' or the through-hole 6.1' is a bore or through-hole drilled into the wood material. Preferably, the hole 6' or through-hole 6.1' has a cross-sectional contour that corresponds or substantially corresponds to the cross-sectional contour of the pipe 50.

[0080] In the support frame 1', the at least one retaining element 2', 3', or 4', in particular the retaining element 2', is designed in at least two parts or exclusively in two parts and comprises two individual parts 13, 14, which have or consist of wood material, in particular of the same wood material. Preferably, the individual parts 13, 14 are each elongated. Preferably, the individual parts 13, 14 each extend with their longitudinal extent in the longitudinal direction of the retaining element 2'.

[0081] Preferably, the individual parts 13, 14 are configured to be joined together, in particular to be joined longitudinally. For example, the individual parts 13, 14 are fastened to one another by means of fastening elements, in particular separate fastening elements such as screws or the like, in particular to one another longitudinally. Additionally or alternatively, the individual parts 13, 14 can also be joined together by adhesive bonding, in particular to one another.

[0082] Preferably, a circumferential section 13.1 or 14.1 of the hole 6' or the through-hole 6.1' is formed on each of the individual parts 13, 14. Preferably, the circumferential sections 13.1, 14.1 are designed such that they at least partially encompass the circumferential contour of the pipe 50. If, for example, the pipe 50 has a circular cross-section, the hole 6' or the through-hole 6.1' preferably has a corresponding circular cross-section. In this case, the circumferential sections 13.1, 14.1 each form a circular arc, for example, of a semicircle.

[0083] Figure 10Figure 2 shows a further embodiment of a heat storage device 200. The heat storage device 200 is suitable, for example, for heating support and / or domestic hot water heating. The heat storage device 200 can be a buffer storage tank or a domestic hot water storage tank. The heat storage device 200 comprises a container 210, which is designed to hold a liquid heat storage medium in its interior.

[0084] The heat storage unit 200 uses the support frame 1 or the support frame 1' as a component of a heat exchanger of the type of heat exchanger 100 according to the Figure 1 The interior contains the support frame 1 or the support frame 1' together with the attached pipe 50. Preferably, the pipe 50 together with the support frame 1 or the support frame 1' forms a pre-assembled unit, such as those made from the Figure 1 This is evident. This unit is preferably installed in container 210.

[0085] For example, connection points 52 and 53 of pipeline 50, as seen, for example, from the Figure 1 These components are visibly attached to the container 210 and / or protrude from the container 210 through corresponding openings or passages, for example, to allow connection of a piping system carrying the heat transfer medium. This piping system may be for distributing a heat transfer medium heated in a heating system.

[0086] Preferably, the container 210 has at least one, for example two, connections 220 or 230 to connect the interior to a (in the Figure 10(not shown) to connect the piping system (flow-wise) and / or to fill or empty the interior 2. For example, the heat storage tank 200 can be connected to a heating circuit of a heat supply system via connections 220 and 230 if, for example, the heat storage tank 200 is to be used as a buffer tank. The heat storage tank 200 can also be connected to a potable water network via connections 220 and 230 if, for example, the heat storage tank 200 is to be used as a domestic hot water storage tank.

[0087] Preferably, the container 210 has a base 240 in the region of its lower end, in particular its longitudinal lower end, so that it can be placed on a surface. Preferably, the container 210 is cylindrical and comprises a side wall 250 extending around a central axis M, a (in the Figure 10(Not visible) floor and a ceiling 260, which surround the interior. Preferably, the side wall 250 has a plurality of elongated wall elements 270. Preferably, the wall elements 270 extend with their longitudinal extent in the direction of the central axis M, with adjacent wall elements lying longitudinally against each other.

[0088] Preferably, the container comprises a wooden material that at least partially forms or defines the interior space. This wooden material can be the type described above. As can be seen from the Figure 10 As can be seen, the container can be a barrel-shaped wooden container, with the wall elements 270 formed by staves. To hold the wall elements 270 together circumferentially, ring structures 280, in particular ring-shaped bands, such as metal bands, can be provided, which surround the outer circumference of the container 210. Reference symbol list

[0089] 1, 1'Support frame 2, 2' 3,Retaining element 3'Retaining element 4, 4'Retaining element 5, 5'Connection points 5.1Connection point 5.1'Connection point 6, 6'Hole 6.1Through hole 6.1'Through hole 7, 7'Through 8Insertion opening 9Locking element 10Insertion receptacle 11Plug section 12Dovetail joint 13Single part 13.1Circular section 14Single part 14.1Circular section 15Footprint 16Long-side end 17Cross connector 18Cross connector 19Cross connector 20.1Long-section 20.2Long-section 20.3Long-section 21, 21'Axis 22Wall surface 23Wall surface 24 Long side 25 Front side 50 Pipeline 51 Helix shape 52 Connection point 53 Connection point 54 Interior 100 Heat exchanger 200 Heat storage 210 Tank 220 Connection 230 Connection 240 Footprint 250 Side wall 260 Ceiling 270 Wall elements 280 Ring structure y-space axis, clear width, M-center axis

Claims

1. Heat reservoir (200), for example for heating support and / or process water heating, having a container (210), which is set up to receive a liquid heat accumulator reservoir in its inner space, and having a heat exchanger (100) arranged in the inner space of the container (210), said heat exchanger comprising a support frame (1) and a pipe (50) attached thereto, said pipe being able to be flowed through by a heat transfer medium, the support frame (1) comprising several elongated holding elements (2, 3, 4), which extend in the direction of a spatial axis (y) with their longitudinal extension and have several or a plurality of attachment points (5) for the pipe (50), wherein, when seen in the direction of the longitudinal extension of the holding elements (2, 3, 4), the attachment points (5) are arranged one behind the other, in order to hold the pipe (50) at least via a longitudinal portion in a helix shape running around the spatial axis (y) and extending in the direction of the spatial axis (y), and at least one transverse connector (17; 18; 19), via which the holding elements (2, 3, 4) are connected to one another, in order to form, together with the holding elements (2, 3, 4), a combination that can be freely positioned, characterised in that at least one of the holding elements (2, 3, 4) has a wooden material or consists thereof.

2. Heat reservoir according to claim 1, wherein the wooden material is a solid wood and has, in particular, oak wood or acacia wood or robinia woold or chestnut wood or poplar wood or consists thereof.

3. Heat reservoir according to claim 1 or 2, wherein at least one of the attachment points (5) of the at least one holding element (2; 3; 4) is formed, in particular moulded, on the at least one holding element (2; 3; 4).

4. Heat reservoir according to one of the preceding claims, wherein at least one of the attachment points (5) of the at least one holding element (2; 3; 4) has a hole (6) present in the wooden material or is formed therefrom, in order to attach the pipe (50) thereto, in particular to attach it directly and / or immediately, or to attach it via a fastening element.

5. Heat reservoir according to claim 4, wherein the wooden material is dried and has or does not meet a predetermined degree of moisture, and wherein the hole (6) has a clear width (w), and the clear width (w) is measured in order to receive the pipe (50) or the fastening element for the pipe (50) in the hole (6), in particular receive it with play, and, in the event of the wooden material swelling, to effect a clamping force caused by this on the pipe (50).

6. Heat reservoir according to claim 4 or 5, wherein the hole (6) is a passage hole (6.1), and the passage hole (6.1) has a passage (7) running tangentially in relation to the spatial axis (y) through the at least one holding element (2; 3; 4), in order to receive the pipe (50) therein.

7. Heat reservoir according to claim 6, wherein the passage hole (6.1) has an insertion opening (8) on a side turned outwardly or inwardly radially in relation to the spatial axis (y), in order to, via this, introduce the pipe (50) into the passage hole (6.1) longitudinally by a movement in the radial direction in relation to the spatial axis (y).

8. Heat reservoir according to claim 7, wherein a securing element (9) is allocated to the at least one holding element (2; 3; 4), said securing element at least partially sealing the insertion opening (8), in order to secure the pipe (50) against being moved out via the insertion opening (8).

9. Heat reservoir according to claim 8, wherein a plug-in receiver (10) is moulded on the at least one holding element (2; 3; 4), in which plug-in receiver the securing element (9) is introduced under cover of the introduction opening (8).

10. Heat reservoir according to one of claims 4 to 6, wherein the at least one holding element (2'; 3'; 4') is formed in two parts and comprises two individual parts (13, 14), which are set up to be connected to each other, wherein in each case a peripheral portion of the hole (6) is formed on the individual parts (13, 14).

11. Heat reservoir according to one of the preceding claims, comprising a positioning face (15) for position on a subsurface, wherein the positioning face (15) is allocated to a longitudinal end (16) of the holding elements (2, 3, 4).

12. Heat reservoir according to one of the preceding claims, wherein the pipe (50) has a corrugated pipe or consists thereof.