Heat-insulated product

Abstract

The invention relates to a heat-insulated product with an interior and an inner wall, wherein the interior is at least partly delimited by the inner wall, and the interior is at least partially thermally insulated from the surroundings of the product by a vacuum damping body. The vacuum damping body has a vacuum region which is encased by a vacuum-tight sleeve, and the vacuum-tight sleeve is at least partly formed by the inner wall and a film.

Description

[0001] Thermally insulated product

[0002] The present invention relates to a thermally insulated product having an interior space and an inner wall, wherein the interior space is at least partially delimited by the inner wall, wherein the interior space is at least partially thermally insulated from an environment of the product by a vacuum insulation body, wherein the vacuum insulation body has a vacuum region enclosed by a vacuum-tight shell.

[0003] Vacuum insulation bodies with a vacuum-tight high-barrier film that has very low permeability to gases, such as air, within a specific temperature range are known from the prior art. The high-barrier film surrounds a vacuum region, with a core made of pearlite rock arranged in the vacuum region. According to the prior art, these vacuum insulation bodies are evacuated through an evacuation port, creating the vacuum region within the vacuum insulation body. This opens up shaping possibilities, e.g., for three-dimensional objects. The vacuum insulation body, which has not yet been evacuated, is placed in a mold and then evacuated. The shape is largely retained and stabilized by the evacuation.Industrially feasible evacuation times are achieved using sorption pumps, which have the necessary flow cross-sections and allow the required temperature control for vacuum drying to be limited to a specific area. Such sorption pumps are known from EP 3 027 953 A1, EP 3 224 559 A1, and EP 3 452 768 A1.

[0004] In particular, it is known to insulate refrigerators and / or freezers, especially in the household sector, using such vacuum insulation bodies. Vacuum insulation bodies for the insulation of refrigerators and / or freezers are therefore designed with box- or plate-shaped basic geometries.

[0005] Particularly in the transition area between the warm and cold sides of a state-of-the-art vacuum insulation body, the high-barrier film preferably does not have any pronounced metallic layers. This minimizes or eliminates thermal bridges across the vacuum-tight high-barrier film. For vacuum insulation bodies for refrigerators and / or freezers, metallized high-barrier films, for example, with a vapor-deposited aluminum layer, are therefore used, since the thermal bridge caused by a single layer of rolled aluminum with a layer thickness of 7 μm would impair thermal insulation by approximately 30%.

[0006] In the case of vacuum insulation bodies with metallized high-barrier foil, i.e., with a vapor-deposited metal layer, the long-term function of the vacuum insulation body is limited at higher operating temperatures. More gas can penetrate through metallized high-barrier foils than through those with pronounced metal layers. The diffusion rate of gas through high-barrier foils increases exponentially with increasing temperature. A doubling of the diffusion rate can be expected for a 10°C temperature increase. This significantly reduces the insulating effect over the service life of a vacuum insulation body with a metallized high-barrier foil when used at high temperatures. The use of vacuum insulation bodies for thermal insulation in warm areas is therefore associated with technical difficulties. This is particularly the case with hot water storage tanks, e.g.in heating or domestic hot water systems exhibit considerable energy losses due to heat dissipation into the environment and would therefore achieve a significantly improved heat storage capacity through highly effective vacuum insulation.

[0007] Against this background, the present invention is based on the object of providing a vacuum insulation that enables long-term stable thermal insulation even at higher temperatures.

[0008] This object is achieved by the subject matter having the features of independent claim 1. Advantageous developments of the invention are the subject matter of the dependent claims.

[0009] Accordingly, the invention provides that the vacuum-tight envelope is formed at least partially by the inner wall and a film.

[0010] For example, for hot water storage tanks, this enables a cost-effective, thermally superior solution compared to known solutions.

[0011] In other words, the container to be insulated can also serve as an inner vacuum-tight shell, i.e., as the inner wall of a vacuum insulation body. Since such containers are usually made of metal and are watertight anyway, they can be designed without excessive effort to achieve an acceptable gas diffusion rate through the container.

[0012] The outer vacuum-tight shell, i.e. the film of the vacuum insulation body, is preferably a high-barrier film, which is usually only exposed to the ambient temperature, for example room temperature, and thus has an acceptable gas diffusion rate in order to enable an acceptable service life of the vacuum insulation of the container and at the same time offers the advantages of a film shell with regard to shaping, minimal thermal bridges and simultaneous stability against thermal stresses and costs.

[0013] The film is preferably largely unheated by heat from the interior, so that the film remains vacuum-tight. Thus, only a small area of ​​the film is in thermal contact with the inner wall. Preferably, only less than 5%, preferably less than 2%, of the film's surface area is in thermal contact with the inner wall.

[0014] A vacuum-tight or diffusion-tight envelope, a vacuum-tight or diffusion-tight connection, or the term "high-barrier film" is preferably understood to mean a envelope, a connection, or a film by means of which the gas ingress into the vacuum region of the vacuum insulation body is reduced to such an extent that the increase in the thermal conductivity of the vacuum insulation body caused by gas ingress is sufficiently low over its service life. A service life can be assumed, for example, to be 15 years, preferably 20 years, and particularly preferably 30 years. The increase in the thermal conductivity of the vacuum insulation body caused by gas ingress over its service life is preferably < 100% and particularly preferably < 50%.

[0015] Preferably, the area-specific gas transmission rate of the shell or the connection or the high-barrier film is < 10' 5 mbar*l / m 2*s and especially preferred < 10' 6 mbar*l / m 2 *s (measured according to ASTM D-3985). This gas transmission rate applies to nitrogen and oxygen. For other gases (especially water vapor), low gas transmission rates also exist, preferably in the range of < 10' 2 mbar*l / m 2 *s and particularly preferably in the range of < 10' 3 mbar*l / m 2*s (measured according to ASTM F-1249-90). The aforementioned small increases in thermal conductivity are preferably achieved through these low gas transmission rates. A known wrapping system from the field of vacuum panels is so-called high-barrier films. In the context of the present invention, these preferably refer to single- or multi-layer films (which are preferably sealable) with one or more barrier layers (typically metallic layers or oxide layers, with aluminum or an aluminum oxide preferably being used as the metal or oxide) that meet the above-mentioned requirements (increase in thermal conductivity and / or area-specific gas transmission rate) as a barrier against gas ingress.

[0016] The above-mentioned values ​​and the structure of the high-barrier film are exemplary, preferred specifications that do not limit the invention.

[0017] A possible design is one in which the vacuum insulation body forms a full vacuum system. A full vacuum system is defined as thermal insulation that consists exclusively or predominantly of an evacuated area filled with a core material such as perlite or perlite rock. Foam insulation or any other thermal insulation apart from the full vacuum system is preferably not provided.

[0018] It is preferably provided that the inner wall directly adjoins the interior space and that the inner wall surrounds the interior space by more than 50%, preferably by more than 70%, in particular by more than 90%.

[0019] In an advantageous embodiment, it is provided that the inner wall is part of a container or pipe.

[0020] Preferably, the inner wall is at least partially made of metal and / or the film is a high-barrier film, in particular an aluminum composite film with at least one layer of rolled aluminum. Preferably, the inner wall and the film are connected in a vacuum-tight manner by means of a joint.

[0021] In an advantageous embodiment, it is provided that the product comprises a connection designed for the conduction of a medium, preferably a fluid, from the interior, wherein the inner wall at least partially forms a component of the connection, wherein the connection between the inner wall and the film at least partially encompasses the connection.

[0022] Preferably, the product comprises a tube and a connection is arranged at one end or at both ends of the tube, wherein the tube at least partially delimits the interior space.

[0023] In an advantageous embodiment, it is provided that the connection comprises a press seal, wherein the press seal is designed such that a part of the film is clamped in the press seal, preferably with a pressure of more than 20 bar, in particular more than 50 bar.

[0024] It is preferably provided that the press seal comprises a compensating element which has a Shore A hardness of more than 60, in particular more than 80, wherein the compensating element acts as a pressure distributor.

[0025] In an advantageous embodiment, it is provided that the vacuum insulation body in the region of a connection has a greater, preferably more than twice the wall thickness of the vacuum insulation body in another region.

[0026] The connection between the inner wall and the film, i.e. the two shells, is preferably made at an outlet or outlets on the tank. In hot water tanks, it is common to have several such outlets on the sides at different heights, for example to be able to take advantage of the stratification of the water in the tank. It is also conceivable to arrange the connections at the top or bottom of the tank or on several sides of the tank. Each of these outlets can be connected in a vacuum-tight manner to both the inner tank, i.e. the inner wall, and to the high-barrier film, i.e. the film. This is preferably achieved using a press seal, in which the high-barrier film is pressed with high force and using a compensating material onto a flange-shaped surface attached to the outlets.

[0027] It has been found to be advantageous that with such a surface pressure, using a compensating material with a Shore A hardness of more than 80 and ensuring a contact pressure of more than 50 bar across the entire surface, a leakage rate of less than 10' 7 mbar*l / s can be achieved and the connection is therefore sufficiently vacuum-tight.

[0028] The connection or connections are preferably made at least partially of metal in order to be connected to the container with sufficient tightness by means of a soldered, preferably a welded, connection.

[0029] As a result, the connection or connections represent a thermal bridge due to the thermal insulation, since the material thickness of the connections, which are preferably designed in the form of a tube, is preferably large enough to guarantee a secure vacuum-tight connection at the soldering or welding points.

[0030] This thermal bridge can be reduced by designing the vacuum insulation body asymmetrically around the usually cylindrical container. For example, the wall thickness of the vacuum insulation body can be 50 mm all around and increased to 150 mm to 200 mm in the area of ​​the connections. Due to the small circumference of the connections, an aluminum composite foil with a layer of rolled aluminum can be used as the high-barrier foil. This is advantageous for the service life and costs of the insulation. Preferably, the foil is in the form of a three-side seam bag or a center seam bag, wherein at least one seam is shortened by one or more foil folds and / or wherein the three-side seam bag has two punched holes so that it can be pulled over a pipe and / or partially rests on a sealing surface, with the remaining foil folded to the side.

[0031] It is preferably provided that the product comprises a sorption pump, preferably arranged in or on the film, wherein the sorption pump comprises flow paths which are at least partially surrounded by a sorption material, wherein the sorption pump is arranged and designed in such a way as to evacuate the vacuum region.

[0032] It is conceivable that the sorption pump includes an integrated valve.

[0033] Preferably, the product comprises a protective wall, wherein the protective wall is arranged between the vacuum insulation body and the environment, wherein the protective wall is connected to the film by means of a number of connecting points, wherein the connecting points preferably comprise a heat-sealing layer arranged on the film.

[0034] In an advantageous embodiment, it is provided that the size of the surface area of ​​each connection point is at least in one dimension smaller than 1.2 times, in particular smaller than 0.6 times the thickness of the protective wall divided by the root of half the product of the thermal expansion coefficient of the protective wall and the temperature difference between the melting point of a hot melt adhesive forming the connection point and the room temperature.

[0035] Preferably, the film is provided with folds, with the folds extending into the vacuum region. In an advantageous embodiment, a supporting material, in particular perlite, is arranged in the vacuum insulation body. The supporting material is preferably in powder form.

[0036] It is preferably provided that the product comprises a vacuum insulation panel, wherein the vacuum insulation panel is preferably arranged in the vacuum region, wherein the vacuum insulation panel preferably comprises a glass fiber mat as a support core.

[0037] It is preferably provided that the interior has a temperature below -20 °C, preferably below -70 °C, in particular below -190 °C or above 20 °C, preferably above 60 °C, in particular above 100 °C, preferably up to 120 °C.

[0038] In an advantageous embodiment, the product is a fluid storage device, in particular a storage device for liquid gas or hot water, or a heating cabinet. The storage device can be a component of a system, preferably a heating system.

[0039] In a further embodiment of the invention, the thermally insulated product according to the invention can be a component of a district heating or district cooling system, such as a line, in particular a pipe for conducting the district heating or district cooling medium.

[0040] The thermally insulated product preferably comprises a hot container or pipe, but is not limited to this. Due to the possible low material usage of film, preferably high-barrier film, the container or pipe can also be used effectively in the cryogenic sector, in which case the connections are usually, but not necessarily, located at the top of the container. Furthermore, the container can serve not only as a separate storage unit, but also as part of an industrial plant. The invention also relates to a method for producing a thermally insulated product according to the invention, comprising the steps:

[0041] - Providing an interior space delimited by an interior wall;

[0042] - at least partially covering the interior with a film;

[0043] - Connecting the inner wall to the film so that a vacuum-tight vacuum area is created between the inner wall and the film;

[0044] - Evacuate the vacuum area.

[0045] The features described herein are, mutatis mutandis, preferably features of the product as well as of the process.

[0046] It should be noted here that the terms "a" and "an" do not necessarily refer to exactly one of the elements, although this represents a possible embodiment, but can also refer to a plurality of the elements. Likewise, the use of the plural also includes the presence of the element in question in the singular, and conversely, the singular also encompasses several of the elements in question. Furthermore, all features of the invention described herein can be combined with one another as desired or claimed in isolation from one another.

[0047] Further advantages, features, and effects of the present invention will become apparent from the following description of preferred embodiments with reference to the figures, in which identical or similar components are designated by the same reference numerals. Herein:

[0048] Fig. 1 : a perspective semi-transparent view of an embodiment of a heat-insulated product according to the invention.

[0049] Fig. 2: a perspective semi-transparent view of another embodiment of a thermally insulated product according to the invention. Fig. 3: a sectional view of a terminal of an embodiment of a thermally insulated product according to the invention.

[0050] Fig. 4: a perspective semi-transparent view of a film of an embodiment of a heat-insulated product according to the invention.

[0051] Fig. 5: schematic representations of the results of the folding steps leading to a film of an embodiment of a thermally insulated product according to the invention.

[0052] Fig. 6: a perspective semi-transparent view of another embodiment of a thermally insulated product according to the invention.

[0053] Fig. 7: a sectional view of another embodiment of a heat-insulated product according to the invention.

[0054] Fig. 1 shows a thermally insulated product comprising a container 10 that at least partially defines an interior space, the interior space being insulated from the environment by a vacuum insulation body. The container 10 forms an inner wall. The container 10 is at least partially surrounded by a film 20, in particular a high-barrier film.

[0055] The container 10 and the film 20 are connected in a vacuum-tight manner, thus forming a vacuum-tight shell. This creates a vacuum region 15 between the container 10 and the film 20, in which a vacuum exists. Supporting material, such as perlite, is arranged in the vacuum region 15. Connections 11, which are components of the container 10, lead from the interior. In the region of the connections 11, the vacuum region 15 is preferably more than twice as thick as a region in which no connections are arranged. The product in Fig. 1 is a hot water tank. However, the product can also comprise any desired thermally insulated container 10 for any desired temperature-controlled medium.

[0056] In Fig. 1, the terminals 11 are arranged laterally. The terminals 11 can also be arranged at the top, as in Fig. 2.

[0057] The connection between a connection 11 and the film 20 is shown in Fig. 3. Here, a preferably annular portion of the film 20 is clamped by a clamping nut 12 between a flange on the connection 11 and the clamping nut 12. A seal 14, which acts as a compensating element and distributes the surface pressure over the entire clamped portion of the film 20, and an anti-twist device 13 are arranged between the portion of the film 20 and the clamping nut 12. This seal seals the vacuum region 15 in a vacuum-tight manner.

[0058] In order to design the film 20 as efficiently as possible and to minimize the number and complexity of the necessary seals within the film 20, it is advisable to design the film 20 as a modified three-side seam bag or block-bottom bag, as shown in Fig. 4. In this case, the film 20 in Fig. 4 is not sealed completely straight along the opposite seal seams as in the classic three-side seam bag, but rather, similar to gable-top carton packaging (similar to Tetra Rex®), is gathered along the opposite seal seams and sealed in multiple layers. Since the structure to be wrapped is usually cylindrical rather than rectangular, this film shape minimizes the film excess.

[0059] Fig. 5 shows the individual results of the steps leading to a film 20 of an embodiment of a thermally insulated product according to the invention. In one step, an unrolled film 120 is provided. This unrolled film is then folded over into a film 220 with a longitudinal seal. This folded over film is then formed into a three-side seam bag 320 with folded-in corners. The forming of the film 20 can be carried out according to principles known from EP 3 247 550 A1.

[0060] EP 3 247 550 A1 discloses a method for applying a film to a body. The film 20 is first applied to a transfer mold and positioned. The body to be filmed is then introduced into the transfer mold, to which the film to be applied is applied, or the transfer mold, to which the film to be applied is applied, is introduced into the body to be filmed, so that the film is located between the body and the transfer mold. A negative pressure is then applied in an area between the body and the film, and / or an overpressure is applied in an area between the transfer mold and the film, so that the film transfers from the transfer mold to the body.

[0061] Experience has shown that film handling, primarily using positive and negative pressure, results in gentle film processes. A characteristic feature of this type of film handling can be the film 20 having folds that extend into the vacuum area 15, for example, into a powder bed located therein.

[0062] In order to enable an evacuation process at a sufficient speed, it is possible to arrange a sorption pump according to the teachings known from EP 3 027 953 A1 and EP 3 224 559 A1 with an integrated valve according to EP 3 452 768 A1 in or on the vacuum insulation body.

[0063] A sorption pump, for example, comprises at least one opening for evacuating the vacuum region, in particular at least one evacuation nozzle, in the shell of the vacuum insulation body. At least one adsorbent material is located in the vacuum insulation body, the adsorbent material being arranged partially or entirely in the region of the opening. Preferably, at least one plate is arranged around the opening and within the vacuum region, forming a wall of the space in which the adsorbent material is located.

[0064] The opening can be provided with at least one valve with at least one valve plate, which opens the opening in the open state and which releases the opening in the closed state, wherein means for vacuum-tight sealing of the opening are arranged outside the sealing area of ​​the valve plate.

[0065] Preferably, the sorption pump is mounted in an area that allows easy docking with an evacuation station and is advantageous in terms of flow. This can be, for example, in the area of ​​the thickened portion of the vacuum insulation body near the connections 11 of the container 10, or centrally at the height of the container 10.

[0066] To protect the film 20 from damage, it is conceivable to attach a protective wall or cover to the product. This could be a sheet of metal or a plastic covering.

[0067] In this case, it is recommended, as described in EP 3 529 545 A1, to apply hot-melt adhesive to the joining partners, i.e. the film 20 and the protective wall or the protective cover, and to bond them by the action of heat, whereby in the case of a metallic protective wall or protective cover, i.e. a sheet of metal, a sealing pattern according to EP 3 715 752 A1 is advantageous in order to avoid dents in the sheet due to thermal distortion.

[0068] The vacuum insulation body and / or a contact area of ​​the protective wall to which it is to be connected can be provided with a hot-melt adhesive. The vacuum insulation body is brought into the desired position relative to the contact area and applied there, and the hot-melt adhesive is then activated by the application of heat. Particularly in heat storage devices, such as hot water storage tanks, the wall thickness of the vacuum insulation body can have a decisive influence on its usability. Since a vacuum insulation body according to the invention cannot be retrofitted to a container or storage tank, the vacuum insulation body is preferably dimensioned such that the storage tank fits through standard doors.

[0069] Since the thermal conductivity of evacuated perlite, at 7 mW / mK, is approximately five times better than that of established Neopor® systems at 35 mW / mK, the use of a vacuum insulation body can still be beneficial even if the diameter of the tank is approximately the width of the door, since, for example, an insulation thickness of 20 mm achieves the same insulating effect as 100 mm of conventional insulation. However, in such a case, no improvement in the energy efficiency of the storage tank can be achieved.

[0070] This challenge with large storage diameters can be solved using the methodology from DE 102013 002 313 A1. Thus, at least one additional vacuum insulation panel can be located in the product, preferably in the vacuum region 15. Due to the existing vacuum region 15, fiberglass panels with metallized foil can be used without having to accept a loss of insulation effect over their service life.

[0071] Such a product is shown in Fig. 6. Here, opposite the product shown in Fig. 1, a vacuum panel 16 with a glass fiber core is arranged in the vacuum region 15.

[0072] Due to the extraordinary insulating effect of evacuated glass fiber mats with thermal conductivities of 1.5 mW / mK, a structure as shown in Fig. 6 is suitable. For example, in the area where the vacuum panel 16 is arranged, the insulation thickness can be limited to 10 mm, whereby the heat transfer is still reduced by a factor of 5 compared to Neopor® insulation with a wall thickness of 100 mm. The vacuum insulation body with support material, i.e. the perlite vacuum insulation body, is then essentially limited to the area above and below the container 10, as well as the connections 11. There is still sufficient volume to keep the gas pressure increase due to the gas entry through the large film surface at a sufficiently low level.

[0073] In addition to the use of vacuum insulation bodies for containers, a special design involves insulating a pipe with a vacuum insulation body. Figure 7 shows an example of such a pipe insulation.

[0074] The connection between each end of the tube 30 and the film 20 is shown in Fig. 7. The connections between the tube 30 and the film 20 are designed similarly to that in Fig. 3. At each end of the tube 30, a preferably annular part of the film 20 is clamped by a clamping nut 12 between a flange on the tube 30 and the clamping nut 12. Between the part of the film 20 and the clamping nut 12 there is a sealing ring 14, which acts as a compensating element and distributes the surface pressure over the entire part of the film 20, and an anti-twist device 13. The same connection is provided at the other end of the tube. This seals the vacuum region 15 in a vacuum-tight manner.

[0075] The film 20 is formed from a high-barrier film. In order to achieve the simplest possible film geometry, the film is designed as a film tube that is pulled over the entire pipe 30 or is manufactured around the pipe 30. In order to achieve good sealing surfaces at the ends, a hole-shaped punch is made at the ends of the film tube, as indicated in Fig. 7, whereby the diameter of the punch is designed so that it fits over the pipe, but offers a flat sealing plane in the flange area. The open ends of the film tube are laid to one side and can be closed by a simple seal, whereby a classic three-side seam bag is created at the end of the film shape. This type of pipe insulation is particularly suitable for pipe elements with a high length-to-cross-section ratio, since a thermal bridge exists at each connecting piece. Possible ratios would be, for example:a pipe length of 6 m with a nominal diameter of 40 mm. For larger pipe diameters, it is advisable not to apply the pressing force via a single thread as indicated in Fig. 7, but rather to apply the pressing force with several screws distributed around the circumference of the pipe flange, as the uniformity of the pressing force is then better ensured.

[0076] Such pipe insulation can be used in particular in cryogenic environments, but applications in process heat, district heating, or district cooling are also conceivable. The pipe can therefore be part of a heating or cooling system. Since the surface area of ​​the film 20 in contact with the hot pipe 30 is small enough to limit diffusive gas ingress into the vacuum insulation body even at high temperatures, operating temperatures of up to 120 °C, for example, are feasible.

[0077] The disclosures of the documents cited herein are preferably hereby incorporated in their entirety into the present disclosure.

Claims

Patent claims Thermally insulated product with an interior space and an inner wall, wherein the interior space is at least partially delimited by the inner wall, wherein the interior space is at least partially thermally insulated from a surroundings of the product by a vacuum insulation body, wherein the vacuum insulation body has a vacuum region enclosed by a vacuum-tight shell, characterized in that the vacuum-tight shell is formed at least partially by the inner wall and a film. Thermally insulated product according to claim 1, characterized in that the inner wall directly adjoins the interior space and the inner wall surrounds the interior by more than 50%, preferably by more than 70%, in particular by more than 90%. Thermally insulated product according to one of the preceding claims, characterized in that the inner wall is a component of a container or pipe. Thermally insulated product according to one of the preceding claims, characterized in that the inner wall consists at least partially of metal and / or that the film is a high-barrier film, in particular an aluminum composite film with at least one layer of rolled aluminum. Thermally insulated product according to one of the preceding claims, characterized in that the inner wall and the film are connected in a vacuum-tight manner by means of a connection. Thermally insulated product according to claim 5, characterized in that the product comprises a connection designed for conducting a medium, preferably a fluid, from the interior, wherein the inner wall at least partially forms a component of the connection, wherein the connection between the inner wall and the film at least partially encompasses the connection.Thermally insulated product according to claim 6, characterized in that the product comprises a pipe and a connection is arranged at one end or at both ends of the pipe, wherein the pipe at least partially delimits the interior space. Thermally insulated product according to one of claims 5 to 7, characterized in that the connection comprises a press seal, wherein the press seal is designed such that a part of the film is clamped in the press seal, preferably with a pressure of over 20 bar, in particular over 50 bar. Thermally insulated product according to claim 8, characterized in that the press seal comprises a compensating element having a Shore hardness. A of more than 60, in particular more than 80, wherein the compensating element acts as a pressure distributor. Thermally insulated product according to one of the preceding claims, characterized in that the vacuum insulation body in the region of a connection has a greater, preferably more than twice the wall thickness of the vacuum insulation body in another region. Thermally insulated product according to one of the preceding claims, characterized in that the film is in the form of a three-side seam bag or a center seam bag, wherein at least one seam is shortened by one or more film folds and / or wherein the three-side seam bag has two punched holes so that it can be pulled over a pipe and / or partially rests on a sealing surface, wherein the remainder of the film is folded to the side.Thermally insulated product according to one of the preceding claims, characterized in that the product comprises a sorption pump, preferably arranged in or on the film, wherein the sorption pump comprises flow paths that are at least partially surrounded by a sorption material, wherein the sorption pump is arranged and designed to evacuate the vacuum region. Thermally insulated product according to claim 12, characterized in that the sorption pump comprises an integrated valve. Thermally insulated product according to one of the preceding claims, characterized in that the product has a protective wall, wherein the protective wall is arranged between the vacuum insulation body and the environment. is arranged, wherein the protective wall is connected to the film by means of a number of connection points, wherein the connection points preferably comprise a heat-sealing layer arranged on the film. Thermally insulated product according to claim 14, characterized in that the size of the surface area of ​​each connection point is, at least in one dimension, smaller than 1.2 times, in particular smaller than 0.6 times, the thickness of the protective wall divided by the square root of half the product of the thermal expansion coefficient of the protective wall and the temperature difference between the melting point of a hot-melt adhesive forming the connection point and room temperature. Thermally insulated product according to one of the preceding claims, characterized in that the film has folds, wherein the folds project into the vacuum region.Thermally insulated product according to one of the preceding claims, characterized in that a supporting material, in particular perlite, is arranged in the vacuum insulation body. Thermally insulated product according to one of the preceding claims, characterized in that the product comprises a vacuum insulation panel, wherein the vacuum insulation panel is preferably arranged in the vacuum region, wherein the vacuum insulation panel preferably comprises a glass fiber mat as a supporting core. Thermally insulated product according to one of the preceding claims, characterized in that the interior has a temperature below -20°C, preferably below -70°C, in particular below -190°C or above 20°C, preferably above 60°C, in particular above 100°C, preferably up to 120°C. A thermally insulated product according to one of the preceding claims, characterized in that the product is a fluid reservoir, in particular a reservoir for liquid gas or hot water, or a component of a district heating or cooling system. A method for producing a thermally insulated product according to one of the preceding claims, comprising the steps: - Providing an interior space delimited by an interior wall; - at least partially covering the interior with a film; - Connecting the inner wall to the film so that a vacuum-tight vacuum area is created between the inner wall and the film; - Evacuate the vacuum area.

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