WO2010135755A2

WO2010135755A2 - Water heater

Info

Publication number: WO2010135755A2
Application number: PCT/AT2010/000183
Authority: WO
Inventors: Michael Gratz
Original assignee: GPG Gebäudetechnik GmbH
Priority date: 2009-05-26
Filing date: 2010-05-26
Publication date: 2010-12-02
Also published as: EP2435766B1; AT12045U1; DE202010007210U1; EP2944893A1; WO2010135755A3; EP2435766A2

Abstract

The invention relates to a water heater (1; 1.1) for installation, particularly the vertical installation, in a building wall, comprising a housing (2) forming a closed storage interior space, wherein the storage interior space is formed by at least two juxtaposed pipe sections (3) having preferably mutually parallel longitudinal axes (4), which pipe sections at the two pipe ends (5) thereof are connected to each other by headers (6, 7), the longitudinal axes (9, 10) of which are disposed at an angle, preferably at a right angle, to the pipe sections (3). The pipe sections (3) and the headers (6, 7) are designed with the same inside diameter (11). In addition, a water heating module (100) comprising a water heater (1; 1.1) is provided.

Description

Boiler

The invention relates to a water heater for particular vertical installation in a building wall or a wall cladding, comprising a closed

Storage interior forming housing, wherein the storage space interior by at least two juxtaposed pipe sections with preferably mutually parallel longitudinal axes, at its two pipe ends by collecting pipes whose

Longitudinal axes are at an angle, preferably at right angles to the pipe sections are connected to each other, is formed, and a hot water preparation module.

For a long time, water heaters of various designs have been known from the prior art. Thus, for example, DE 298 07 077 Ul a hot water boiler with a circular cylindrical peripheral wall and provided at this both ends, the interior tightly closing, curved floors before, the boiler is mounted in a horizontal position. The closed, approximately kreiszylinderfÖrmige container thus forms a single storage chamber for the entire storage volume of hot water. For heating, a tube heat exchanger is provided in the lower half of the storage chamber located in the installation position. The horizontal use of the boiler allows installation in rooms where too little space is provided for the otherwise usual, vertical installation position of a cylindrical boiler with usually over 100 liters capacity. For example, such a lying boiler in an old building with large ceiling heights can be suspended from the ceiling suspended. Horizontal boilers have a poor thermal load and thus the useful volume is reduced.

The well-known disadvantages of such water heaters that they have a large footprint and can only be mounted visibly and thus disturbing in a room, and that the production of the two curved floors as pipe terminations of the cylindrical tube is expensive, are also from the DE 298 07 0 ? 7 Ul described not overcome.

Furthermore, it is disadvantageous in water heaters, in which a single, vertical or horizontal storage chamber is provided for the hot water, that during the heating of the water volume due to the size of the individual storage chamber and due to zones in the storage chamber, the further from the heat source lie away, causing an uneven heating of the water volume. Until the whole in the storage chamber with a capacity of usually over 100 liters of existing service water is heated uniformly to a predetermined temperature level, thus a relatively high energy input is required due to the long heating time. Such water heaters are therefore usually heated during the night hours.

The present invention therefore has as its object to avoid the disadvantages known from the prior art for a water heater of the type mentioned, and to provide a device that due to their dimensions both in municipal housing, and for example in hotels, hospitals or can be used in commercial properties, which can be installed in drywall, in cladding or in masonry in Unteφutzaus execution is easy to manufacture and heated with minimal heat loss efficiently and quickly the respective required amounts of hot water.

This object is achieved in a water heater according to the preamble of claim 1 with the features of the characterizing part of claim 1. The subclaims relate to further advantageous embodiments of the invention.

In an advantageous embodiment, in a water heater according to the invention for vertical installation in particular in a building wall, comprising a housing forming a closed memory interior, wherein the memory interior by at least two juxtaposed pipe sections with preferably mutually parallel longitudinal axes, at its two pipe ends by collecting tubes whose longitudinal axes are at an angle, preferably at right angles, to the pipe sections, are connected to each other, is formed, the pipe sections and the manifolds executed with the same inner diameter.

Embodiments in which the longitudinal axes of the headers are, for example, at different angles deviating from a right angle to one or more of the juxtaposed pipe sections are also contemplated. This makes it possible, for example, to use even diagonally tapered walls in the area of a staircase for the installation of a water heater according to the invention. The use of tubes with the same inner diameter for the production of the pipe sections and the manifolds is not only cheaper, but also facilitates the construction of Miter cuts or transitions between the pipe sections and the headers. Water heaters, with pipes with the same pipe cross-section, ie are each made with the same inner diameter, the same outer diameter and the same wall thickness, are included in the invention.

Also, embodiments of a water heater according to the invention with pipe sections that differ from the circular shape, for example, have oval cross-sections are conceivable. It is important that the water heater according to the invention is suitable for a conventional pressurization regardless of the selection of the geometry of the pipe cross-section.

Another advantageous feature of a water heater according to the invention provides that the longitudinal axes of the pipe sections and the longitudinal axes of the headers lie in a common plane. This ensures the flatest possible construction of the water heater for wall installation.

Appropriately, in a water heater, the pipe sections each with the manifolds by cohesive connections, such as welded joints, pressure-tight connected. Accidental leakage of the stored water is thus reliably avoided. In a hot water tank, which is made of plastic, for example, the pipe sections with the headers may, for example, by adhesive bonds cohesively connected to each other.

Particularly robust is the design of a water heater according to the invention, when the pipe sections are at least partially connected by cohesive connections, for example by welding or adhesive joints.

The cohesive connections, which are arranged at least in sections or at intervals between the pipe sections, increase the strength or rigidity of the housing of the water heater. Depending on the design, the pipe sections of the water heater can each be directly adjacent to each other or spaced apart. The cohesive connections between the pipe sections are provided in the case of directly adjacent pipe sections, for example, as welds. In the case of a gap distance between the juxtaposed pipe sections, it may be necessary, for example, to provide connecting webs in the width of the gap distance or to fix it between the pipe sections in order to achieve the required strength of the integral connection. Suitably, in a water heater according to the invention, the pipe sections and the manifolds made of a metallic material, preferably made of a corrosion-resistant steel in food-grade quality.

Other materials that are suitable for receiving the water to be stored, such as plastics or composite materials, can be used for the production of a water heater according to the invention.

In a further development of a water heater according to the invention an insulation is provided on the outer surfaces of the pipe sections and the manifolds. The insulation significantly increases the energy efficiency of the water heater and reduces heat losses as much as possible.

In a water heater according to the invention, it is particularly expedient to provide at least one temperature control device for heating and / or cooling the stored water, which is heated and / or cooled, for example, by a temperature control medium or is electrically heated.

The water heater can be heated by means of a tempering in any conceivable way. A heating of the temperature control, for example by

District heating, geothermal or solar energy or by another tempering medium is possible in principle. Furthermore, a heating of the temperature control by

Combinations of the individual tempering media possible. Furthermore, the

Water heater, for example, by a combined heating of a temperature control, which is heated by means of a tempering, and another

Temperature control, which is electrically heated, take place. As electrical heating, for example Elektroheizstäbe can be used.

In addition to the temperature control for heating or as an alternative to a water heater according to the invention can also be a tempering for

Cooling of the stored water may be provided. For example, such a water heater according to the invention according to the principle of wall cooling or

Supply of a cooling water system can also be used for room cooling. Also

Combinations of a tempering device for cooling the stored water, for example during the summer months, and a tempering device for heating the stored water in the remaining months with the inventive

Water heater conceivable. In particular, when using the water heater according to the invention with a tempering device for cooling the stored liquid, for example, mixtures of water and a refrigerant or a comparable cold-resistant liquid can be used as a storage medium except water.

Appropriately, in a water heater according to the invention in the installation position lower Grundsammeh ear with at least one pipe flange for installation of a tempering device is provided.

The at least one pipe flange is used, for example, as a Revisionsöfϊhung except to install the temperature control.

In a further development of the water heater according to the invention, at least one temperature control device comprises a coiled tubing through which a temperature control medium can flow, and which is preferably provided with an odd number of pipe sections in the centrally arranged pipe section.

It has been found that the installation of the at least one tempering device with an odd number of pipe sections in the centrally arranged pipe section is advantageous. During the heating phase of the water heater so created in the centrally located pipe section in which the tempering is, a strong convection of the heated water upwards. By this upward flow and the heat transfer is improved by convection in the centrally located pipe section. Furthermore, the rising in the central pipe section thermal flow, that also takes place in the respective symmetrically adjacent pipe sections a rapid and uniform charging or heating of the service water. The water heater is thus heated quickly and evenly from top to bottom to the desired hot water temperature without delay. By completely heating the entire capacity of a thermal disinfection of the water heater is possible and the risk of Legionella formation in dead spaces of the container thus excluded. Due to the rapid and uniform heating a hot water heater according to the invention is particularly economical in operation. Such a water heater, for example, can also be heated rapidly during the day during a short period of time. A long-lasting and thus energy-intensive heating process is not required. In an embodiment of a water heater with an even number of pipe sections, it is also appropriate to provide a tempering in one of the middle pipe sections. Furthermore, it is conceivable for a water heater with a plurality of tempering devices to provide these in each case spaced from each other, for example, in every second, third or fourth pipe section.

Furthermore, it is conceivable to provide an electrically heated temperature control device in the middle pipe section as an alternative to the coiled tubing or as a supplement thereto. Both a coiled tubing, as well as an electrically heated temperature control can thus be introduced particularly comfortable and easy to maintain through the pipe socket into the storage space of the water heater.

In a further development of the invention, in a water heater, the coiled tubing is made of a flexible, preferably heat-expandable corrugated pipe, wherein a first coiled tubing portion is formed by a rising in installation position, preferably coiled, flow pipe and a second coiled tubing portion by a vertically falling in installation position return pipe.

A coiled tube, which is made of a corrugated tube, offers the advantage that the already large heat exchange surface of the coiled tubing by the use of a ribbed

Corrugated tube even further increased and thus the heat transfer of a

Temperiermedium flowed coiled tubing to the water in the water heater is further improved. Furthermore, a flexible, heat-expandable corrugated tube offers the advantage that, due to expansion during heating, calcification of the corrugated tube is prevented or at least significantly reduced in comparison to a rigid temperature-control device.

It is particularly advantageous in a water heater according to the invention for venting into the tube coil, preferably in the return pipe of the coiled tubing, introduced a connected to a vent valve capillary tube.

Through the capillary tube, which is preferably introduced for venting into the tube spiral to its high point or upper vertex, the coiled tubing is vented during filling. A regularly recurring venting of the coiled tubing during operation is possible. Particularly advantageously, the vent valve connected to the capillary tube is thus located outside on the underside of the water heater. A revision opening in the water heater in order to reach the high point or upper vertex of the pipe spiral installed in the installation position, or an additional vent pipe, which is connected for venting at the high point of the coiled tubing, are therefore not required.

Suitably, in a hot water according to the invention at Grundsammeirohr a cold water inlet pipe connected, wherein the mounting position in the interior of the Grundsammeirohrs projecting free end of the cold water inlet pipe is provided with a pipe bend, which opens at the bottom of a horizontally mounted in the lower Grundsammeirohr, preferably angled baffle plate.

Particularly advantageously, the cold water, which passes through a cold water inlet pipe at the base manifold in the interior of the container, deflected by a pipe bend at the free end of the inlet pipe and flows in lateral, horizontal direction from this. A baffle plate, which is horizontally mounted in the base manifold, and at the bottom of which ends the pipe end free end of the cold water inlet pipe, prevents the cold water from immediately entering the pipe section located directly above. Through the baffle plate, the inflowing cold water is evenly distributed over the length of Grundsammeirohrs in the water heater and increases as over the juxtaposed pipe sections evened cold water front. Thus, even during the introduction of cold water, a uniform temperature distribution or temperature stratification within the water heater is achieved.

Advantageously protrudes in a water heater according to the invention, in which a vertical installation position in the hot water outlet pipe coaxially in a pipe section, preferably in a peripheral pipe section is provided, the open top hot water outlet pipe to the inside of Decksammeirohrs.

Thus, only the uppermost, warmest water layer is removed from the water heater directly on the inside of Decksammeirohrs and it will be avoided unwanted short-circuit currents during water removal. The uniform temperature stratification in the individual pipe sections is not disturbed by the removal of water.

In a particularly compact embodiment of a water heater according to the invention it is provided that the largest outer diameter and / or the largest installation depth of the provided with a thermal insulation pipe sections and the headers is at most 250 mm. In this version, the water heater can be installed, for example, in supporting partitions and in drywall walls flush-mounted or as a wall header, which is then installed, invisible. Thus, the water heater can be provided in any room of a building. Also, a subsequent installation of a water heater according to the invention, for example, in the renovation of a building, is particularly easy due to the particularly compact dimensions and invisible mounting flush-mounted.

Depending on the application or depending on the structural conditions, it is possible to provide a water heater according to the invention with a larger installation depth. For example, a cavity in a building wall or a facing shell can be completely filled with a correspondingly custom-made water heater. Or, in the case of a water heater, a particularly thick layer of thermal insulation is provided in order to further increase energy efficiency. These embodiments are also encompassed by the invention.

In a further development of the invention, in a water heating module for installation in a building wall, comprising a water heater according to the invention, a mounting frame, at least one connection fitting for connecting a Temperiermediumsleitung to at least one tempering device and manifolds for selectively connecting the Temperiermediumsleitung with at least one other consumer circuit on all sides with a heat insulation material surrounding water heater vertically mounted within the mounting frame, wherein below the water heater in the mounting frame provided with a service opening distribution box for receiving the at least one connection fitting and the manifold fittings of the individual consumer circuits is arranged.

Particularly advantageous is provided in a hot water preparation module according to the invention for selectively supplying the tempering either for tempering the at least one temperature control of the water heater or for controlling the temperature of the at least one further consumer circuit at least one reversible water heater charging valve.

An inventive hot water preparation module has the advantage that, together with the water heater all for the network with a central heating system required control valves, temperature sensors, circulating pumps, etc., and the sanitary connection fittings such as shut-off valves, safety group, pressure reducing valve and water meter are present in the distribution box integrated in the mounting frame.

Thus, the use of a hot water preparation module according to the invention is particularly suitable for flexible use in municipal housing. For each apartment unit, for example, a hot water preparation module is invisibly installed flush-mounted in a wall of the housing unit. All components for generating hot water as well as for heating and / or for cooling consumer circuits are already integrated in the hot water preparation module.

Optionally, the tempering, which is heated in Temperiermediumsleitungen of a central heating system, such as a solar house heating system, a wood chip or pellet stove or a district heating boiler, either to heat the integrated in the mounting frame water heater, or to supply at least one consumer circuit, such as a Underfloor heating, serve. It is also advantageous that the hot water preparation module is provided with a service opening, for example a distribution box cover, only in the area of the distribution box. Thus, the mounting frame is not perceived in the installed state as a flush mounting design.

Analogously, a hot water preparation module according to the invention can also be used for cooling a dwelling unit, for example, during the summer months. Optionally, the temperature control medium is connected by means of Temperiermediumsleitungen with a central cooling system. As a tempering for example, an antifreeze is used. The water heater is cooled by means of the cooled with the antifreeze tempering and serves as a chiller. The cold water can be conveyed for example in cooling ceiling sail or wall cooling elements and thus serves to cool a room. This application of the water heating module as a cooling device is also included in the invention.

Further features of the invention will become apparent from the following description of exemplary embodiments and with reference to the drawings.

Figures 1 and 2 each show in schematic representations of a water heater according to the invention in a first embodiment. Figures 3 and 4 show schematically in detail views a possible second embodiment of a water heater according to the invention.

Figures 5 to 10 relate to details of the second embodiment of a water heater according to the invention.

Figure 11 shows a schematic representation of a hot water preparation module according to the invention.

The water heater according to the invention shown in Figures 1, 3 and 5 serve for the preparation and storage of hot or cooling water or other liquid media in the usual temperature ranges. The water heaters are usually supplemented with standard heating and / or refrigeration fittings or sanitary fittings and a heat or cold insulation and installed as a finished compact unit. The additional, known from the prior art fittings, supply and discharge pipes are not shown in the figures.

Fig. 1 shows an oblique view of a water heater 1 with a housing 2, which forms a closed storage space for receiving particular water.

The water heater 1 comprises a plurality of juxtaposed pipe sections 3, the longitudinal axes 4 are arranged parallel to each other. At the pipe ends 5 are the

Pipe sections 3 through manifolds 6 and 7, at the upper pipe ends 5 by a

Decksammeirohr 6 or at the lower tube ends 5 by a Grundsammeirohr 7, respectively connected to each other. In the embodiment shown in Fig. 1 are rounded at the

Ends of the manifolds 6 and 7 each quarter ball bottoms arranged as end segments 12. The pipe sections 3 and the deck pipe 6 shown in FIG

Grundsammeirohr 7 are made of a corrosion-resistant steel and have

Miter cuts 8 in the area of welded joints. Since the tubes 3, 6 and 7 each have the same tube cross-section with the same inner diameter 11, the miter cuts 8 are structurally particularly simple and inexpensive to carry out.

In the embodiment of a water heater 1 shown in FIG. 1, the pipe sections 3 are arranged next to one another adjacent to one another and, for example, are connected to one another in a materially joined manner by welding seams, at least in sections. It would also be conceivable to carry out the pipe sections 3 arranged next to one another with a gap spacing at a distance from each other. For example, between the spaced-apart pipe sections 3 individual webs be welded as a section reinforcing. This embodiment and a further variant of a water heater with additional cross-connections between the individual pipe sections 3 for cross-mixing between the individual pipe sections 3, are not shown. In Fig. 1, a heat-insulating layer 13 is indicated on the outside around the pipe sections 3. Due to the thermal insulation layer 13, which is provided on the outside of all pipe sections 3 and the headers 6 and 7, the outer diameter of the tubes 3, 6 and 7 respectively increases by about twice the layer thickness of the thermal insulation layer 13. Thus, especially in a flush mounting the total cross-sectional dimension 14 for the selection of the site of the water heater 1 to be considered. At the bottom of Grundsammeirohrs 7, which here five juxtaposed, vertical in installation position pipe sections 3 connects, is centrally or coaxially with the longitudinal axis 4 of the centrally arranged pipe section 3, a pipe socket 15 welded. The pipe socket 15 is provided with a pipe flange 16 and serves to receive a temperature control device, not shown here or as Revisionsöffiiung the water heater. 1

The housing 2 of the water heater 1 is provided on its two outer sides in each case with retaining straps 17 for attachment to a support frame, not shown.

2 shows a schematic exploded view of the individual components of the water heater 1 known from FIG. 1 in the transition region between the pipe sections 3 arranged parallel next to one another and the base pipe 7 arranged transversely thereto. The longitudinal axis 10 of the main collector pipe 7 is here perpendicular to the longitudinal axes 4 the pipe sections 3. At the ends of the basic collecting tube 7 each end segments 12 are fixed in a quarter-sphere shape. A segmental preparation of the miter cuts 8 at the transitions of the Decksammeirohrs 6 and the basic collecting pipe 7 to the pipe sections 3 is in principle possible and can facilitate the production. In Fig. 2 the outside of the pipe sections 3 a thermal insulation 13 is indicated. The total cross-section 14 of an insulated pipe section 3 is increased with respect to the pipe cross-section with an inner diameter 11 by about twice the layer thickness 13.1 of the thermal insulation material 13. A continuous insulation with a thermal insulation 13 on all outer surfaces of the pipe sections 3 and the manifolds 6 and 7 is provided, for clarity, however, not shown here. The individual segments 12 or pipe parts 3, 6, 7 and 15 are each welded together tightly. When using, for example, plastic for the production of a water heater 1, the individual segments or pipe parts could also be connected by gluing together, the splices for the usual pressurization caused by the water network must be suitable.

The second embodiment of a water heater 1.1 according to the invention, shown in oblique view in FIG. 3, differs from the embodiment shown in FIG. 1 in that the deck tube 6 and the basic cup 7 each have simple miter cuts 8 at their two ends. The outermost pipe sections 3 are here connected to the deck pipe 6 and the base pipe 7 without additional end segments 12. The pipe parts 3, 6, 7 and 15 each have the same pipe cross-section with the same inner diameter 11 and the same wall thicknesses. The production of the connections or transitions between the pipe sections 3 and the collecting pipes 6 and 7 is thus simplified in the variant shown in FIG. 3 in relation to the embodiment variant shown in FIG.

Fig. 4 shows, analogous to Fig. 2, in a schematic exploded view, the individual components of the known from Fig. 3 water heater 1.1 in the transition region between the parallel juxtaposed pipe sections 3 and the arranged perpendicular thereto basic collection pipe 7.

The embodiments of a water heater 1 or 1.1 according to the invention shown in Figures 1 to 4 each show five in a plane parallel juxtaposed pipe sections 3 each having a single, centrally located pipe socket 15 for receiving a temperature control. Likewise, inventive water heater can also include an even number of pipe sections 3 and / or be provided with a plurality of pipe socket 15 for receiving a plurality of tempering. These and other conceivable embodiments of a water heater 1 or 1.1 according to the invention, for example, with pipe sections 3, each having an oval cross-section, are not shown in the figures.

At the water heater 1 or 1.1 all attachments and fixtures, such as temperature sensors, Revisionsöfϊhungen, Elektroheizstäbe, and / or pipe register can be supplemented by welding or weld-in sleeves or Flanschöffiiungen according to the general state of the art. The dimension or the dimensions of the individual components as well as the selection of the materials used are to according to requirements. The number and dimensions of juxtaposed pipe sections 3 significantly affect the storage volume of the water heater. An individual adaptation to the required storage volume is thus easily possible.

Fig. 5 shows a water heater 1.1 in standing installation position in a sectional view frontally from the front. On average, here the wall thicknesses 3.1 of the vertical pipe sections 3, the wall thickness 6.1 of the deck pipe 6 and the wall thickness 7.1 of the basic collecting pipe 7 can be seen. The pipe parts 3, 6, 7 and 15 each have the same pipe cross-section with the same inner diameter 11. In the outermost tube section 3, a hot water outlet pipe 18 is provided coaxially in the longitudinal axis direction 4 of the pipe section 3. The open-top hot water outlet pipe 18 protrudes with its upper free end 18.1, which is designed, for example, bevelled, to the inside of the upper Decksammeirohrs 6. The hot water outlet pipe 18 is performed in a bore of the lower base manifold 7 and sealed with this. The hot water outlet pipe 18 protrudes beyond the layer thickness 13.1 of the thermal insulation material 13 on the underside of the water heater 1.1 and serves to decrease the heated service water.

Furthermore, a vertical tube sleeve 19 is provided for introducing a temperature sensor, not shown. The temperature sensor can from the bottom of the water heater 1.1 from the outside through the Grundsammeirohr 7 through into the housing

2 are introduced. The tubular sleeve 19 is closed at its front free end.

Furthermore, in Fig. 5 in Grundsammeirohr 7 a horizontal cold water baffle plate 20 is provided. The function of the cold water baffle 20 will be explained with reference to FIG. 7.

A connection sleeve 21 is provided, for example, for receiving an additional heating such as a Elektroheizstabs. The connection sleeve 21 can be closed, for example, with a screw.

In Fig. 6, a temperature control device 22 is shown in detail, for installation in the

Raw pipe 15 of the water heater 1 shown in Fig. 5 is provided. The

Temperature control 22 includes a coiled tubing 23, which is traversed by a temperature control and which preferably at an odd number of pipe sections

3 is provided in the centrally located pipe section 3 of the water heater. The coiled tubing 23 is made of a flexible, preferably heat-expandable corrugated pipe, wherein a first coiled tubing portion is formed by a rising in installation position, preferably coiled, flow pipe 23.1 and a second coiled tubing section by a vertically falling in the installed position return pipe 23.2. The supply pipe 23.1 is connected to a supply pipe 25 for the temperature control, which is supplied in the direction of arrow 25.1. The return pipe 23.2 is connected to a discharge pipe 26 for the tempering medium, which exits from the tempering 22 in the direction of arrow 26.1. Together with a cold water inlet pipe 24, the supply pipe 25 and the discharge pipe 26 are performed in holes of a blind flanges 27 and welded tightly to the blind flange 27.

The blind flange 27 is provided with a seal 28 which serves to seal the water heater when connecting the blind flanges 27 to the pipe flange 16 provided for this purpose. The cold water inlet pipe 24 is provided at its front, free end with a pipe bend, the inflowing in the direction of arrow 24.1 cold water is thus deflected laterally and leaves the cold water inlet pipe 24 in approximately horizontal direction to the side.

Fig. 7 shows in a sectional view in detail the cold water inlet pipe 24 in the installed position. In installation position protrudes the front free end of the cold water inlet pipe 24, which with a

Pipe elbow 24.2 is provided, inside the base pipe 7. The

Cold water inlet pipe 24 opens at the bottom 20.1 one in the bottom Grundsammeirohr

7 horizontally mounted baffle 20. By the baffle 20, which along its

Leading edge is angled, the cold water inlet pipe 24 fed cold water is advantageously distributed over the length of the basic collecting pipe 7 over all pipe sections 3 and flows as ascending cold water front evenly upwards.

Fig. 8 shows in a partial sectional view of a further detail to Fig. 6. For venting the temperature control 22, a capillary tube 29 connected to a vent valve 30 is inserted into the tube coil 23, here in the return pipe 23.2 of the tube coil. The capillary tube 29 protrudes in the installed position in the interior of the tube coil 23 to its high point or to the upper vertex. When filling the tube coil 23 with the circulating tempering medium thus the entire tube coil 23 can be vented particularly comfortable. Furthermore, with this capillary tube 29, a recurring venting of the tube coil 23 during operation is possible. For sealing the capillary tube 29 and the associated vent valve 30, a pipe plug 31 is provided. Fig. 9 shows the known from Fig. 5 water heater 1.1 in a sectional view from above. In this view, the particularly compact design of the water heater 1.1 is easy to see. The largest external diameter 14 or the largest installation depth 14.1 of the pipe sections 3 provided with a thermal insulation 13 with a layer thickness 13.1 and the manifolds 6 and 7 is at most 250 mm. Thus, the water heater according to the invention is ideal for invisible installation under plaster in a building wall or in drywall or in shells.

Fig. 10 shows in detail a section of the tube coil 23. The tube coil 23 is made of a flexible, heat-expandable corrugated tube. By the rib-like surface of the corrugated tube, the heat exchange surface of the tube coil 23 is advantageously further increased.

11 shows a schematic representation partially in sectional view of a hot water preparation module 100 for installation in a building wall. The

Hot water preparation module 100 includes a water heater 1.1, a

Mounting frame 50, at least one connection fitting 60 for connecting a

Temperiermediumsleitung to at least one temperature control device 22 and

Distributor fittings 70 for selectively connecting the Temperiermediumsleitung with at least one other consumer circuit 80. The all sides with a

Heat insulation material 13 surrounded water heater 1.1 is with his

Support tabs 17 vertically mounted within the mounting frame 50, wherein below the water heater 1.1 in the mounting frame 50 with a Serviceöfmung

52 provided distributor box 51 for receiving the connection fittings 60 and the manifold fittings 70 of the individual consumer circuits 80 is arranged.

For selectively supplying the tempering either for tempering the temperature control device 22 of the water heater 1.1 or for controlling the temperature of the at least one further consumer circuit 80 at least one reversible water heater charging valve 71 is provided in the hot water preparation module 100. By means of a further bypass valve 72, the heating medium can be required so long in a short circuit until the temperature required for hot water preparation is reached in order to avoid discharge of the container. The individual consumer circuits 80, for example, floor or wall heating, can also be completely decoupled from the temperature control 22 of the water heater 1.1 to allow priority to hot water. The distribution box 51 further includes the respective required sanitary fittings, such as pressure reducing valves, water meters, safety valves and shut-off valves, which are not explicitly indicated in FIG. 11 for the sake of clarity.

The mounting frame 50 is installed flush-mounted in a building wall. The Serviceöffiiung 52 of the distribution box 51 is closed, for example, with a cover. All other components of the hot water preparation module 100, the mounting frame 50 and the insulated water heater 1.1 are clad invisible by means of plasterboard. Thus, only the cover of the service opening 52 can be seen particularly beautifully from the built-in flush-mounted hot water preparation module 100.

List of item numbers:

1 water heater (or variant 1.1)

2 housings

3 pipe section

3.1 Wall thickness of the pipe sections

4 longitudinal axis of the pipe sections

5 pipe end

6 deck pipe

6.1 Wall thickness of the decking pipe

7 basic pipe

7.1 Wall thickness of the Gnindsammelrohrs

8 miter cut

9 longitudinal axis of the Decksammeubehrs

10 longitudinal axis of Grundsammeirohrs

11 inner diameter of the tubes 5, 6, 7

12 ending segment

13 thermal insulation material

13.1 layer thickness of the thermal insulation material

14 outer diameter of the tubes 3, 6, 7 together with thermal insulation material

14.1 installation depth

15 pipe socket

16 pipe flange

17 retaining strap

18 hot water outlet pipe

18.1 Free end of the hot water outlet pipe

19 pipe sleeve (for installation of a temperature sensor)

20 cold water baffle plate

20.1 Bottom of the cold water baffle

21 connection sleeve (for additional electric heating)

22 tempering device

23 coiled tubing

23.1 Flow pipe

23.2 return pipe

24 cold water inlet pipe

24.1 inlet direction for cold water

24.2 elbow List of item numbers:

25 Supply pipe for temperature control medium

25.1 Infeed direction for temperature control medium

26 Discharge tube for temperature control medium

26.1 Flow direction for temperature control medium

27 blind flange with connection piece

28 seal

29 capillary tube

30 bleed valve

31 pipe plugs

32 electric auxiliary heating

50 mounting frame

51 distribution box

52 service opening

60 connection fitting

70 distributor fitting

71 Water heater charging valve

72 bypass valve

80 consumer cycle

100 water heating module

Claims

Claims:

1. Water heater (1, 1.1) for in particular vertical installation in one

Building wall or a wall panel, comprising a housing forming a closed memory interior (2), wherein the storage space by at least two juxtaposed pipe sections (3) with preferably mutually parallel longitudinal axes (4) at its two pipe ends (5) by

Collecting tubes (6, 7) whose longitudinal axes (9, 10) at an angle, preferably in the right

Angle to the pipe sections (3) are connected to each other, is formed, characterized in that the pipe sections (3) and the collecting pipes (6, 7) are designed with the same inner diameter (11).

2. Water heater (1, 1.1) according to claim 1, characterized in that the longitudinal axes (4) of the pipe sections (3) and the longitudinal axes (9, 10) of the collecting pipes (6, 7) lie in a common plane.

3. Water heater (1, 1.1) according to claim 1 or 2, characterized in that the pipe sections (3) in each case with the collecting pipes (6, 7) by cohesive connections, for example by welded joints, are pressure-tightly interconnected.

4. Water heater (1, 1.1) according to one of the preceding claims, characterized in that the pipe sections (3) are connected to each other at least in sections by material connections, for example by welding or adhesive joints.

5. Water heater (1, 1.1) according to one of the preceding claims, characterized in that the pipe sections (3) and the collecting pipes (6, 7) are made of a metallic material, preferably of a corrosion-resistant steel in food-grade quality.

6. Water heater (1, 1.1) according to one of the preceding claims, characterized in that on the outer surfaces of the pipe sections (3) and the collecting pipes (6, 7) an insulation (13) is provided.

7. Water heater (1, 1.1) according to one of the preceding claims, characterized in that at least one tempering device (22) for heating and / or cooling the stored water is provided, which is heated and / or cooled or electrically heated, for example, by a temperature control.

8. A water heater (1, 1.1) according to claim 7, characterized in that in the installation position lower base pipe (7) with at least one pipe flange (16) for

Installation of a temperature control device (22) is provided.

9. Water heater (1, 1.1) according to claim 7 or 8, characterized in that at least one tempering device (22) comprises a coiled tubing (23) through which a tempering medium can flow and which preferably at an odd number of pipe sections (3) in centrally arranged pipe section (3) is provided.

10. Water heater (1, 1.1) according to claim 9, characterized in that the coiled tubing (23) is made of a flexible, preferably heat-expandable corrugated pipe, wherein a first coiled tubing section by a rising in installation position, preferably coiled, flow pipe (23.1) and a second coiled tube section is formed by a vertically falling in the installed position return pipe (23.2).

11. A water heater (1, 1.1) according to claim 9 or 10, characterized in that, for venting into the coiled tubing (23), preferably in the return pipe (23.2) of the

Coil (23), a with a vent valve (30) connected capillary tube (29) is inserted.

12. A water heater (1, 1.1) according to one of the preceding claims, characterized in that a cold water inlet pipe (24) can be connected to the base pipe (7), the free end of the cold water inlet pipe (24) projecting into the installation position into the interior of the base pipe (7). is provided with a pipe bend (24.2), which at the bottom (20.1) of a bottom Grundsammeirohr (7) horizontally mounted, preferably angled, baffle plate (20) opens.

13. A water heater (1, 1.1) according to any one of the preceding claims, characterized in that a vertical in the installation position hot water outlet pipe (18) coaxially in a pipe section (3), preferably in an edge pipe section

(3) is provided, wherein the open top hot water outlet pipe (18) to the inside of Decksammeubehrs (6) protrudes.

14. Water heater (1, 1.1) according to one of the preceding claims, characterized in that the largest outer diameter (14) and / or the largest installation depth (14.1) of the heat insulation (13) provided with pipe sections (3) and the collecting pipes (6 , 7) is at most 250 mm.

15. A water heating module (100) for installation in a building wall, comprising a water heater (1; 1.1) according to one of claims 1 to 14, a mounting frame (50), at least one connection fitting (60) for connecting a tempering medium line to at least one tempering device (22 ) such as

Distributor fittings (70) for selectively connecting the Temperiermediumsleitung with at least one other consumer circuit (80), characterized in that the all sides with a thermal insulation material (13) surrounded water heater (1, 1.1) is vertically mounted within the mounting frame (50), below of the water heater (1, 1.1) in the mounting frame (50) with a

Service opening (52) provided distribution box (51) for receiving the at least one connection fitting (60) and the manifold fittings (70) of the individual consumer circuits (80) is arranged.

16. Hot water preparation module (100) according to claim 15, characterized in that for selectively supplying the tempering medium either for tempering the at least one temperature control device (22) of the water heater (1; 1.1) or for controlling the temperature of the at least one further consumer circuit (80) at least one switchable Water heater charging valve (71) is provided.