Housing for a continuous flow heater, electric continuous flow heater and arrangement

Abstract

The invention relates to a housing (10) for an instantaneous water heater (11), the housing (10) comprising at least one housing rear wall (12) and at least one housing cover (13), wherein the at least one housing rear wall (12) comprises at least two mounting points (14) and the at least one housing cover (13) comprises at least one fastening point (15), wherein at least one of the mounting points (14) is designed and configured to fasten the at least one housing rear wall (13) to a support by means of at least one fastening means (16) through the at least one mounting point (14), and wherein the at least one fastening point (15) is designed and configured to fasten the at least one housing cover (13) to the at least one housing rear wall (12) by means of at least one further fastening means (16).wherein the fastening means (16) can be fastened to the support by means of at least one fastening point (15) and by means of a further mounting point (14). The invention further relates to a corresponding instantaneous water heater (11) and an arrangement.

Description

[0001] The invention relates to a housing for an instantaneous water heater, the housing comprising at least one housing rear wall, at least one housing cover, at least one fastening means and at least one further fastening means, wherein the at least one housing rear wall comprises at least two mounting points and the at least one housing cover comprises at least one fastening point.

[0002] Furthermore, the invention relates to an electric instantaneous water heater for heating a liquid.

[0003] The invention further relates to an arrangement comprising a housing and / or instantaneous water heater attached to a support, in particular to a wall, by means of fastening means.

[0004] Enclosures for instantaneous water heaters, especially electric ones, have been a well-established technology for many years. These enclosures typically feature uniform designs, primarily providing a cover for the interior. Beyond their aesthetic appeal, these enclosures serve to protect the water heaters, and in particular their mechanical and electronic components such as the heating element, from external contamination, damage, and water. Water can, for example, affect the enclosure from the outside. For these instantaneous water heaters and their enclosures, there are legal or product-specific requirements regarding water protection, such as those documented in IPX5. In other words, the enclosures must be shielded from the environment to prevent contamination or unauthorized access to the interior.This shielding is achieved, for example, by a suitable positioning of the housing above the interior and by appropriate sealing surfaces between the two housing parts.

[0005] In addition to water that comes into contact with the casing from the outside, condensation can also form inside the casing under certain conditions. This condensation must not have any harmful effects on the interior of the water heater. Electric water heaters, specifically instantaneous water heaters, and their casings, therefore have at least one condensate drain opening in the lower part of the casing to allow the condensate to drain from the interior. Furthermore, condensate traps and corresponding partitions may be provided inside the casing to prevent contact with the condensate.

[0006] The housings typically consist of a first housing part, namely a lower part, which is preferably a housing rear panel, and a second housing part, namely an upper part, which is preferably a housing cover. The housing rear panel, which can also be designed or referred to as a housing rear panel shell, and the housing cover, which can also be designed or referred to as a cover, form a preferably enclosed interior space for the functional components of the instantaneous water heater. Generally, the water heaters, and in particular the instantaneous water heaters, are permanently mounted to a wall. Various methods for wall mounting are known.

[0007] The housings also provide an important mounting option for the instantaneous water heater to the designated supports, which are usually (house) walls or other load-bearing elements, particularly by means of appropriate fasteners (e.g., screws). Housings for instantaneous water heaters with a rear panel and a cover are known in the art. Besides mounting the instantaneous water heaters to a wall bracket previously installed on the wall, it is common practice to screw the water heaters directly to the wall using their rear panel. In this case, the screws are inserted through the rear panel of the unit at predetermined positions, the so-called mounting points or fixing points. For mounting such housings to a wall, the rear panel typically has recesses through which it is secured to the wall using screws.

[0008] CN 215983257 U discloses a water heater housing and a gas water heater comprising it, wherein the water heater housing includes a backplate assembly and a panel assembly, the backplate assembly being provided with a first clamping element, the panel assembly being provided with a second clamping element, and the first clamping element being provided with a second clamping element. The backplate assembly and the panel assembly are connected to each other by the first clamping element and the second clamping element. Mounting plates are provided for direct attachment of the water heater housing to a wall.

[0009] DE102020214886 A1 relates to a housing for a heating device, in particular an instantaneous water heater, comprising a back panel for mounting on a wall and a cover for attaching to the back panel. It is further disclosed how to attach a front panel to the cover.

[0010] DE 29825031U1 describes a household appliance, in particular an electric instantaneous water heater, to be attached to a wall, comprising a base that is attached to a wall and a cover that is placed on the base.

[0011] EP 2226588A1 relates to a lower housing part that can be combined with at least one other housing part to form a housing for hot water appliances. When assembled, the lower housing part has externally accessible markings for determining the fixing points of the housing to a wall.

[0012] These known designs, however, have the disadvantage that the water heaters or their housings must be disassembled to determine the mounting points and for the mounting itself, as the markings are obscured by the housing or located inside it. These additional disassembly and assembly steps are time-consuming and therefore expensive. Furthermore, repeatedly opening and closing the housing and the associated disassembly and assembly of the water heater or its components poses a risk of damage.

[0013] For reliable and trouble-free operation of instantaneous water heaters, it is crucial that the housing is securely attached to the mounting surface (e.g., wall) according to the manufacturer's instructions. Instantaneous water heaters can weigh several kilograms, making careful installation essential. Furthermore, conventional instantaneous water heaters typically offer limited access for work within the housing, making installation according to the manufacturer's instructions often problematic and time-consuming, and increasing the risk of damage, particularly to electrical or electronic components inside the housing. With conventional instantaneous water heaters, the entire housing usually needs to be removed to connect to the external power supply, resulting in significant labor.Furthermore, installation positions are often chosen that do not provide optimal access to the mounting points (fastening points). Additionally, the housing covers serve a decorative function, which is why publicly visible mounting points are generally undesirable. Due to the difficult-to-access mounting points, which are regularly located inside the housing, additional fastening of the housing cover to the base of the housing is required, making the installation of the instantaneous water heater prone to errors and time-consuming.

[0014] It is therefore an object of the present invention to provide a housing for an instantaneous water heater that, on the one hand, ensures reliable attachment of the housing to a support and, on the other hand, is quick and easy to manufacture. The object further is to provide a suitable instantaneous water heater and an arrangement for an instantaneous water heater.

[0015] This problem is solved by the aforementioned housing for an instantaneous water heater in that at least one of the mounting points is designed and configured to fasten the at least one housing rear wall to a support, in particular to a wall, by means of the at least one fastening means, and that the at least one fastening point is designed and configured to fasten the at least one housing cover to the at least one housing rear wall by means of the at least one further fastening means, wherein the at least one further fastening means can be fastened to the support by means of the at least one fastening point and by means of another of the mounting points.In other words, preferably, a fastening means can be attached to the wall via one of the mounting points for mounting the at least one housing rear panel to a wall, and a further fastening means can be attached to the wall via the mounting point and via another of the mounting points for mounting the at least one housing cover on the housing rear panel. The housing according to the invention achieves, in an unforeseen and functional way, that simple, quick, and therefore cost-effective installation of the housing or the instantaneous water heater is ensured. In this way, it is possible first to attach the housing rear panel to the support surface via the at least two mounting points, and then—without separate securing of the housing rear panel—to attach the housing cover via the at least one mounting point on the housing rear panel.This eliminates the need for complicated and time-consuming screwing of the housing's rear panel to an instantaneous water heater, which also requires special care regarding the internal components. The housing according to the invention makes it possible to attach the rear panel and the housing cover together simultaneously. Then, when attached, for example for maintenance purposes, only the housing cover can be removed without having to completely detach the rear panel from its support. Thus, the housing, or the instantaneous water heater, can be attached to the designated support in a closed and complete manner without having to open or disassemble it. The housing according to the invention for an instantaneous water heater therefore reduces the risk of damage to the housing and the components inside it.The assembly, disassembly, or maintenance of the housing according to the invention for an instantaneous water heater can thus be reliably carried out even by less trained or qualified persons, which further increases the range of applications and locations for such instantaneous water heaters while simultaneously reducing maintenance and assembly costs. The arrangement of the mounting points in conjunction with the fastening points can also prevent incorrect assembly, as the respective arrangement of the points relative to each other provides a convenient solution for achieving a step-by-step and safe assembly process.

[0016] In the context of the invention, the mounting points represent the corresponding areas / mounting locations through which the corresponding fastening means for attaching the housing rear panel to the support are provided. The housing rear panel can also be referred to as the housing lower section. The housing rear panel is not directly the back of the housing, but rather the housing section designed to receive the housing cover. The support for mounting the instantaneous water heater preferably comprises a wall or ceiling surface. However, the support includes at least a section of a load-bearing element to secure the housing rear panel to the support by means of the fastening means through the mounting points. The support does not necessarily have to be a flat bearing surface, but rather at least a corresponding section for the mounting points.For the mounting points and / or fastening points, it is not necessary that these have recesses / cutouts / openings, etc., or be formed from receptacles. For example, it may be sufficient for the area of ​​the housing containing the mounting points and / or fastening points to have a marking, or alternatively, a (material) taper or perforation that, during the fastening process, provides a recess for the insertion of a fastener. A preferred embodiment is characterized in that the mounting points and / or fastening points are provided in the housing part as notches, recesses, material ridges, material lugs, or the like, or are formed by the housing itself.In other words, the mounting points and / or fastening points are designed and configured as drilled holes or receptacles for fasteners, particularly screws, on the housing part. In a particularly preferred embodiment, the mounting points and / or fastening points are perpendicular to each other and parallel or perpendicular to the outer contour of the housing part. More preferably, the mounting points and / or fastening points are drilled holes designed and configured for fastening by fasteners, which are particularly preferably screws.

[0017] The material of the housing according to the invention for an instantaneous water heater preferably comprises predominantly plastics (e.g., ABS, PS, PP, etc.), in particular durable plastics that possess corresponding strength and durability properties. The housing material must, on the one hand, be sufficiently lightweight, provide a certain degree of protection against (splashing) water, and offer a means of attachment to a support.

[0018] Advantageously, in a further embodiment of the invention, the housing is characterized in that the rear wall and / or the housing cover each have material recesses and / or raised areas as markings at least two points, but preferably at four evenly distributed points. The provision and arrangement of such markings facilitate the easy and quick determination of the mounting points and / or fastening points. A further advantageous embodiment of the invention is characterized in that the rear wall of the housing is a housing component of an instantaneous water heater. The rear wall of the housing is particularly suitable for providing the externally accessible markings due to its close fit to the wall.

[0019] A preferred embodiment is characterized in that the at least one housing rear wall comprises four mounting points and that the at least one housing cover comprises two fastening points, wherein the mounting points are designed and configured for arranging the at least one housing rear wall on a support by means of at least one fastening means each, and wherein the two fastening points are designed and configured for arranging the at least one housing cover on the at least one housing rear wall by means of at least one further fastening means each, wherein the further fastening means can be fastened to the support by means of the fastening points and by means of the further mounting points.In other words, the at least one housing rear panel preferably comprises four mounting points, the at least one housing cover comprising two mounting points, and the at least one housing rear panel being attached to a wall by means of two fasteners that can be fastened to the wall by means of two of the mounting points, and the at least one housing cover being attached to the housing rear panel by means of two further fasteners that can be fastened to the wall by means of the two mounting points and the two further mounting points. The four mounting points, in conjunction with the two mounting points, ensure a reliable and secure attachment of the housing rear panel to the support surface and a reliable and secure attachment of the housing cover to the housing rear panel.Preferably, the mounting points are located in the corner areas or on the sides of the housing rear panel, and the fastening points are further preferably located in two of the corner areas or on each side of the housing cover. The combination of fastening the housing rear panel to the support or fastening the housing cover in conjunction with the housing rear panel to the support is resource-efficient, since the respective fastening means for securing the housing cover and the housing rear panel are provided in this way. Furthermore, it is possible to remove the housing cover from the housing rear panel by removing two fastening means, while the housing rear panel remains attached to the support. This facilitates work on the instantaneous water heater, which is attached to the support by means of two fastening means via the mounting points, or on the components located in the housing rear panel.Depending on the size or weight of the enclosure, it may be advantageous to provide more than four mounting points or more than two fastening points, preferably with twice as many mounting points as fastening points.

[0020] An advantageous further development is characterized by the fact that at least one of the mounting points and / or at least one of the fastening points has a recess for the passage of at least one fastening element. In this way, the rear panel and / or the housing cover does not need to be penetrated by the fastening elements, but rather a convenient arrangement is provided. The respective fastening element can be guided precisely through the recess of the corresponding mounting point and / or fastening point without damaging other components or areas. Furthermore, this improves the accuracy of attaching the housing to the support surface, as well as the overlapping fastening of a fastening element by a fastening point and the associated superimposed mounting point.

[0021] In a further advantageous embodiment of the invention, the fastening points are arranged diagonally to one another on the at least one housing cover. The diagonal arrangement of the housing cover with the housing rear panel facilitates assembly and prevents damage when attaching the housing cover to the rear panel. The fastening points are preferably located on the sides or in the corners of the housing cover, thereby ensuring maximum coverage. Due to the diagonal arrangement of the fastening points, two fastening points between the housing cover and the housing rear panel are generally sufficient to guarantee reliable and complete fastening of the housing cover.

[0022] A preferred embodiment of the invention is characterized in that the at least one housing rear wall and the at least one housing cover are designed and configured to be essentially congruent with each other, with at least one of the fastening points and at least one of the mounting points being arranged essentially one above the other. This congruent design allows for improved fastening and provides reliable protection against (splashing) water. The housing cover is preferably designed and configured to be essentially congruent with the housing rear wall in the area of ​​the mounting points and the fastening points. Furthermore, recesses are preferably provided at the superimposed mounting points and fastening points, allowing for the insertion and fastening of fasteners.

[0023] According to a further preferred embodiment of the invention, the at least one housing cover comprises at least two housing cover side walls, wherein at least one of the housing cover side walls is tapered in the area of ​​the fastening points and / or the at least one mounting point in order to expose a fastening element area. In this way, an interior housing space is formed by the at least one housing cover in conjunction with the housing rear wall. The interior housing space is thus delimited from the fastening points and / or the mounting points, eliminating the need for internal fastening. This facilitates the protection of the interior housing space and the (electronic) components arranged therein against external influences such as (splashing) water.Furthermore, the tapered section provides easy access to the relevant mounting points and / or at least one fastening point. This reduces assembly time and minimizes the risk of damage during installation, while simultaneously allowing convenient access to the housing interior for any necessary maintenance.

[0024] A further advantageous embodiment of the invention is characterized in that the at least one housing cover comprises at least one housing recess for arranging at least one external connection cable through the at least one housing recess on the at least one housing rear wall. The housing recess allows an external connection cable to be provided inside the housing without creating an external recess on the housing rear wall. This provides easy access to the housing interior for the external connection cable and protects the housing rear wall, for example, against dirt or (splashing) water.

[0025] A preferred embodiment of the invention is characterized in that the housing comprises at least one access cover that can be arranged on the at least one housing cover and is designed and configured for attachment to the at least one housing rear wall and / or to the at least one housing cover. The at least one housing cover provides easy access to the interior of the housing without having to remove the entire housing cover. By arranging the mounting points in conjunction with the fastening points, a corresponding space is provided that would otherwise be occupied by suitable fasteners.

[0026] A preferred embodiment of the invention is characterized in that the at least one access cover is designed and configured to close the at least one housing recess, whereby, in the closed state of the housing recess, the at least one external connecting cable is secured against access. The access cover is designed and configured, in particular, to at least partially cover the housing recess. The access cover is preferably provided to cover at least one connecting element between the external and internal power supply, wherein, for this purpose, the at least one connecting element is designed and configured, in particular, as at least one terminal block behind the access cover on the rear wall of the housing or on the at least one housing cover. The access cover briefly releases access to the connecting element when required, while otherwise the access to it can be closed.In this way, for example, protection against (splashing) water is provided and the access cover prevents unauthorized access to the connecting cable.

[0027] An advantageous further development is characterized by the inclusion of at least one securing element in the housing recess, which is designed and configured to securely hold at least one external connection cable within the recess. The securing element preferably comprises at least one rubber grommet for the passage of the at least one external connection cable. The securing element protects the housing recess against (splashing) water and prevents the at least one external connection cable from slipping, for example, under tensile loads.

[0028] In a further preferred embodiment of the invention, the at least one housing rear wall is designed and configured for attachment to a support with at least one fastening means, and the at least one housing cover is designed and configured for attachment to the at least one housing rear wall and to the support with at least one further fastening means, wherein the at least one housing cover forms and configures a liquid spray nozzle for the at least one housing rear wall. In this way, water ingress into the housing interior is prevented. For this purpose, further means may preferably be provided, such as seals or local material thickenings.

[0029] In a further advantageous embodiment of the invention, the at least one housing rear wall and the at least one housing cover each have an overlapping area formed by at least one circumferential rib, which is designed and configured to form a circumferential sealing surface between the housing rear wall and the at least one housing cover. The at least one circumferential rib can be made of the same material as the housing rear wall and the housing cover or, in a further preferred embodiment, of another material with special sealing properties. Preferably, the at least one rib of the housing rear wall and the housing cover is formed and configured integrally with the base body of the housing rear wall or the housing cover, respectively.

[0030] The problem is also solved by the aforementioned electric instantaneous water heater according to the invention, comprising a housing according to the invention, wherein the instantaneous water heater includes at least two fastening means for attaching the housing to a support, in particular to a wall. The electric instantaneous water heater provides, on the one hand, a means for reliable, convenient, and simultaneously secure attachment of the instantaneous water heater to a support, and on the other hand, simple and therefore cost-effective installation. The presence of the mounting points in conjunction with the fastening points on the housing according to the invention allows for improved utilization of the enclosing interior space of the instantaneous water heater, thereby enabling efficient use of the available space and providing an intuitive method of attachment.

[0031] To avoid repetition, particular reference is made in connection with the electric instantaneous water heater according to the invention to the advantages already described in connection with the housing according to the invention. These also apply analogously to the electric instantaneous water heater according to the invention.

[0032] The problem is further solved by the aforementioned arrangement according to the invention, comprising a housing and / or an instantaneous water heater according to the invention, which is attached to a support, in particular to a wall, by means of fastening means. The arrangement particularly enables a reliable, convenient, and at the same time secure attachment of the instantaneous water heater according to the invention to a support. Furthermore, it provides a simple and cost-effective way to mount the instantaneous water heater according to the invention using appropriate fastening means.

[0033] To avoid repetition, particular reference is made in connection with the arrangement according to the invention to the advantages already described in connection with the housing and the instantaneous water heater according to the invention. These also apply analogously to the arrangement according to the invention.

[0034] Further advantageous and / or beneficial features and developments, as well as preferred components of the housing and the instantaneous water heater according to the invention, will become apparent from the dependent claims and the description. Particularly preferred embodiments of the housing and the instantaneous water heater, as well as the arrangement, are explained in more detail with reference to the accompanying drawings. The drawings show: Fig. 1 a schematic representation of a housing according to the invention for an instantaneous water heater or an instantaneous water heater according to the invention in a perspective view, Fig. 2 a schematic side view of the housing according to the invention. Fig. 1 shown in the inventive housing for an instantaneous water heater or of the inventive instantaneous water heater, Fig. 3 a schematic front view of the in Fig. 1 and in Fig. 2 shown in the inventive housing for an instantaneous water heater or of the inventive instantaneous water heater, Fig. 4 a schematic detail view of a section of the in Fig. 3 shown housing according to the invention for an instantaneous water heater or of the instantaneous water heater according to the invention and Fig. 5 a schematic exploded view of the in Fig. 1 bis Fig. 4 shown housing according to the invention for an instantaneous water heater, the instantaneous water heater according to the invention or the arrangement according to the invention.

[0035] The housing, the instantaneous water heater and the arrangement according to the invention are described in more detail with reference to the aforementioned figures.

[0036] The housing 10 shown in the drawings is designed as an example of a housing 10 for an instantaneous water heater 11. The invention relates in the same way to comparable housings 10 which also have a component for generating hot water.

[0037] Fig. 1 bis Fig. 5 Each figure schematically shows an embodiment of a housing 10 for an (electric) instantaneous water heater 11, and an (electric) instantaneous water heater 11 comprising at least one housing rear wall 12 and at least one housing cover 13, wherein the at least one housing rear wall 12 comprises at least two mounting points 14 and the at least one housing cover 13 comprises at least one fastening point 15. In the Fig. 1 bis Fig. 3 A housing 10 according to the invention, in particular a housing 10 for an instantaneous water heater 11, or an instantaneous water heater 11 itself, is shown. The housing 10 is depicted in the assembled state in the drawings, with the housing cover 13 arranged on the rear wall 12 of the housing. The housing cover 13 provides individual mounting points 14 and has corresponding fastening points 15. In the perspective view of the Fig. 1 No fasteners are shown at mounting points 14 or mounting points 15, whereas in the Fig. 3 Fastening means 16 for attaching the housing 10 are shown. For the intended use of the instantaneous water heater 11, a power supply is required in these versions, so that in the Fig. 3 The connection to the external power supply is shown as an example. The rear housing wall 12 preferably comprises the electrical and / or electronic components 20 and the cartridge 21 for hot water generation. The corresponding components are arranged on the rear housing wall 12 and are at least substantially covered by the housing cover 13 when the housing 10 is assembled. The fluid lines 22 are preferably provided through an opening in a preferred side wall 23 of the rear housing wall into the interior of the housing 24.

[0038] According to the invention, this housing 10 is characterized in that at least one of the mounting points 14 is designed and configured to fasten the at least one housing rear wall 12 to a support, in particular a wall, by means of at least one fastening means 16 through the at least one mounting point 14, and that the at least one fastening point 15 is designed and configured to fasten the at least one housing cover 13 to the at least one housing rear wall 12 by means of at least one further fastening means 16, wherein the fastening means 16 can be fastened to the support through the at least one fastening point 15 and through a further one of the mounting points 14. In this way, the housing 10 is fastened to the support either only through at least one of the mounting points 14 or through the fastening point 15 of the housing cover 13 and through the mounting point 14 to the support.

[0039] An advantageous embodiment is characterized in that the at least one housing rear wall 12 comprises four mounting points 14 and that the at least one housing cover 13 comprises two fastening points 15, wherein the mounting points 14 are designed and configured for arranging the at least one housing rear wall 12 on a support by means of at least one fastening means 16 each, and wherein the two fastening points 15 are designed and configured for arranging the at least one housing cover 13 on the at least one housing rear wall 12 by means of at least one further fastening means 16 each, wherein the further fastening means 16 can be fastened to the support by means of the fastening points 15 and by means of the further mounting points 14. Fig. 1 and Fig. 3 The two fastening points 15 in conjunction with the mounting points 14 and the further two mounting points 14 of the housing rear panel 12 are shown. In the Fig. 5 The fastening of the housing 10 by means of the fastening means 16 is shown in detail. It is illustrated that the housing 10 is designed and configured, on the one hand, for fastening the housing rear panel 12 by means of the mounting points 14, and on the other hand, for fastening the housing cover 13 and the housing rear panel 12 to a support by means of the fastening means 16 by means of the mounting points 15 and the mounting points 14. The fastening means 16 are in the Fig. 5 shown by way of example as screws which provide a connection between the support and housing 10 as well as between the housing rear wall 12 and the housing cover 13.

[0040] In an advantageous embodiment, at least one of the mounting points 14 and / or at least one of the fastening points 15 has a recess 17 for the passage of at least one fastening element 16. The recesses 17 are located in the Fig. 1 , Fig. 4 and Fig. 5 shown. Preferably, each of the mounting points 14 and each of the fastening points 15 has an independent recess 17, each designed for the insertion of fastening elements 16. In the detailed view of the Fig. 4 The recess 17 is shown as a perforation of the material. In preferred embodiments, for example, the mounting points 14 arranged below the fastening points 15 can do without recesses 17, with the corresponding mounting points 14 being at least partially perforated when fastened by fasteners 16.

[0041] In another preferred embodiment, the fastening points 15 are arranged essentially diagonally to each other on the at least one housing cover 13. Fig. 3 and Fig. 5 Figure 1 shows an exemplary embodiment of the housing 10 with the mounting points 15 arranged diagonally on the housing cover 13, thereby creating the greatest possible distance between them. In the areas where no mounting points 15 are present, as shown in the Fig. 5 shown, a recess is provided to allow access to the respective mounting point 14 of the housing rear panel 12.

[0042] Preferably, the at least one housing rear wall 12 and the at least one housing cover 13 are designed and configured to be substantially congruent with each other, wherein at least one of the fastening points 14 and at least one of the mounting points 15 can be arranged substantially one above the other. The congruent and superimposed arrangement is particularly evident from the Fig. 1 , Fig. 2 , Fig. 3 and Fig. 5 The housing 10 is formed by the overlapping arrangement of the housing cover 13 on the housing rear wall 12. The fastening points 15 are, in particular, if present, essentially arranged on the corresponding mounting points 14 in order to form the feedthrough with a single fastening means 16.

[0043] An advantageous embodiment is characterized in that the at least one housing cover 13 comprises at least two housing cover side walls 18, wherein at least one of the housing cover side walls 18 is tapered in the area of ​​the fastening points 15 and / or the at least one mounting point 14 in order to expose a fastening element area 19. The housing cover 13 preferably has housing cover side walls 18 on each of its sides, which may be interrupted by openings or be continuous. Fig. 4 Figure 1 shows a section of the housing cover 13 with the mounting point 15 and the mounting area 19, which tapers through the housing cover side walls 18, in detail. The housing cover 13 preferably provides a mounting area 19 at each of four locations to allow convenient access to the mounting points 14 and the mounting points 15, respectively. To form the mounting points 15, the mounting area 19 has a flat housing cover section 25, which is designed and configured for placement on the corresponding mounting point 14 to secure the housing cover 13 to the housing rear wall 12. The flat housing cover section 25 is located in the Fig. 4 shown in detail, wherein this further preferably has the recess 17 for the insertion of a fastening means 16.

[0044] In a preferred embodiment, the at least one housing cover 13 includes at least one housing recess 26 for arranging at least one external connection cable 27 through the at least one housing recess 26 on the at least one housing rear wall 12. The in Fig. 3 and Fig. 5 The embodiments of the housing 10 and the instantaneous water heater 11 shown in the illustrations comprise at least one housing recess 26, which is designed for the passage of at least one connecting cable 27, here two connecting cables 27. More preferably, the housing 10 comprises at least one access cover 28 that can be arranged on the at least one housing cover 13 and which is designed and configured for attachment to the at least one housing rear wall 12 and / or to the at least one housing cover 13. As shown in the Fig. 5 As shown, the at least one access cover 28 is preferably provided for detachable connection with the housing cover 13, for which purpose the at least one access cover 28 can be connected to the housing cover 29 by means of at least one fastening means 16. Preferably, the at least one access cover 28 is designed and configured to close the at least one housing recess 26, wherein, in the closed state of the housing recess 26, the at least one external connecting cable 27 is secured against access. Fig. 3 The case 10 shows an accessible case recess 26, while the Fig. 1 The housing recess 26, closed by at least one access cover 28, is shown, thus preventing access to any components, such as external connection cables 27. Preferably, at least one securing means 30 is provided in the housing recess 26, which is designed and configured to securely arrange at least one external connection cable 27 in the housing recess 26. Fig. 3 and Fig. 5 Two securing devices 30 are shown, which are provided for the secure arrangement of the connecting cables 27. The securing devices 30 are in the embodiments of the Fig. 3 and Fig. 5 designed as a terminal block or as a connection terminal to provide a secure connection and a transmission source to the instantaneous water heater 11.

[0045] Another advantageous embodiment is characterized in that the at least one housing rear wall 12 is designed and configured for fastening to a support (not shown in detail in the figures) with at least one fastening means 16, and that the at least one housing cover 13 is designed and configured for fastening to the at least one housing rear wall 12 and to the support with at least one further fastening means 16, wherein the at least one housing cover 13 forms and provides a liquid spray nozzle for the at least one housing rear wall 12. Preferably, for this purpose, the at least one housing rear wall 12 and the at least one housing cover 13 each have an overlap area 32 formed by at least one circumferential web 31, which is designed and configured to form a circumferential sealing surface 33 between the housing rear wall 12 and the at least one housing cover 13.In the side view of the . Fig. 2 as well as in the exploded view of the Fig. 5 The overlap area 32 and the resulting sealing surface 33 are shown as an example. This provides reliable protection against (splashing) water in particular, to protect the housing interior 24 from water ingress.

[0046] The aforementioned descriptions relating to the housing 10 apply equally to the instantaneous water heater 11 according to the invention for heating a liquid, comprising a housing 10 according to the invention, wherein the instantaneous water heater 11 further comprises at least two fastening means 16 for attaching the housing 10 to a support, in particular to a wall. The aforementioned descriptions also refer to the arrangement comprising a housing 10 according to the invention and / or an instantaneous water heater 11 according to the invention, which is attached to a support, in particular to a wall, by means of fastening means 16. The fastening of the instantaneous water heater 11 or of the housing 10 of the instantaneous water heater 11 is described in the Fig. 5 This is exemplified by the exploded views with the corresponding fasteners 16. To fasten the housing 10, the housing rear panel 12 is first attached diagonally to a suitable support using fasteners 16 through two of the mounting points 14. For this purpose, the mounting points 14 are selected that are not intended for the arrangement of the fastening points 15. In the Fig. 5 Mounting point 15 is selected at the top left and bottom right. To position the housing cover 13 on the housing rear wall 12, and for final and secure fastening, the two additional fastening elements 16 are attached to the mounting points 15 at the top right and bottom left, as well as to the mounting points 14 located below them at the top right and bottom left, with a suitable support, so that a configuration according to Fig. 3is present. Furthermore, for the mounting of the housing 10, connection points, e.g. drill holes and / or dowels, may preferably be provided to facilitate the fastening of the housing 10, in order to create a simplified and secure arrangement of the housing 10 or the instantaneous water heater 11.

Claims

1. Housing (10) for a continuous flow heater (11), the housing (10) comprising at least one housing rear wall (12), at least one housing cover (13), at least one fastening means (16) and at least one further fastening means (16), wherein the at least one housing rear wall (12) comprises at least two mounting points (14) and the at least one housing cover (13) comprises at least one fastening point (15), wherein at least one of the mounting points (14) is configured and adapted to be fastened to a support, in particular to a wall, via the at least one fastening means (16) through the at least one mounting point (14), characterised in that the at least one fastening point (15) is configured and adapted to fasten the at least one housing cover (13) to the at least one housing rear wall (12) by means of the at least one further fastening means (16), wherein the at least one further fastening means (16) is fastenable to the support by the at least one fastening point (15) and by a further one of the mounting points (14).

2. Housing (10) according to claim 1, characterised in that the at least one housing rear wall (12) comprises four mounting points (14) and in that the at least one housing cover (13) comprises two fastening points (15), wherein the mounting points (14) are configured and adapted for arranging the at least one housing rear wall (12) on a support by means of at least one fastening means (16) respectively, and wherein the two fastening points (15) are configured and adapted for arranging the at least one housing cover (13) on the at least one housing rear wall (12) by means of at least one further fastening means (16) respectively, wherein the further fastening means (16) are fastenable to the support by the fastening points (15) and by the further of the mounting points (14).

3. Housing (10) according to claim 1 or 2, characterised in that at least one of the mounting points (14) and / or at least one of the fastening points (15) has / have a recess (17) for the passage of at least one fastening means (16).

4. Housing (10) according to one or more of claims 1 to 3, characterised in that the fastening points (15) are arranged diagonally to one another on the at least one housing cover (13).

5. Housing (10) according to one or more of claims 1 to 4, characterised in that the at least one housing rear wall (12) and the at least one housing cover (13) are configured and adapted to be substantially congruent to one another, wherein at least one of the fastening points (15) and at least one of the mounting points (14) are arrangeable substantially one above the other.

6. Housing (10) according to one or more of claims 1 to 5, characterised in that the at least one housing cover (13) comprises at least two housing cover side walls (18), wherein at least one of the housing cover side walls (18) is configured and adapted to taper in the region of the fastening points (15) and / or the at least one mounting point (14) in order to expose a fastening means region (19) respectively.

7. Housing (10) according to one or more of claims 1 to 6, characterised in that the at least one housing cover (13) comprises at least one housing recess (26) for arranging at least one external connection cable (27) through the at least one housing recess (26) on the at least one housing rear wall (12).

8. Housing (10) according to one or more of claims 1 to 7, characterised in that the housing (10) comprises at least one engagement cover (28) arrangeable on the at least one housing cover (13), which engagement cover (28) is configured and adapted for fastening to the at least one housing rear wall (12) and / or to the at least one housing cover (13).

9. Housing (10) according to claims 7 and 8, characterised in that the at least one engagement cover (28) is configured and adapted for closing the at least one housing recess (26), wherein in the closed state of the housing recess (26) the at least one external connection cable (27) is secured against access.

10. Housing (10) according to one or more of claims 7 to 9, characterised in that at least one securing means (30) is provided in the housing recess (26), which is configured and adapted to securely arrange at least one external connection cable (27) in the housing recess (26).

11. Housing (10) according to one or more of claims 1 to 10, characterised in that the at least one housing rear wall (12) is configured and adapted for fastening with at least one fastening means (16) on a support, and in that the at least one housing cover (13) is configured and adapted for fastening with at least one further fastening means (16) on the at least one housing rear wall (12) and on the support, wherein the at least one housing cover (13) forms and adapts a fluid splash guard for the at least one housing rear wall (12).

12. Housing (10) according to one or more of claims 1 to 11, characterised in that the at least one housing rear wall (12) and the at least one housing cover (13) each have an overlap region (32) formed by at least one circumferential web (31), which is configured and adapted to form a circumferential sealing surface (33) between the housing rear wall (12) and the at least one housing cover (13).

13. Electric continuous flow heater (11) for heating a liquid, comprising a housing (10) according to one or more of claims 1 to 12, wherein the continuous flow heater (11) further comprises at least two fastening means (16) for fastening the housing (10) to a support, in particular to a wall.

14. Arrangement comprising a housing (10) and / or continuous flow heater (11) fastened to a support, in particular to a wall, by means of fastening means (16) according to one or more of claims 1 to 13.

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