TW202210768A - Hot water appliance - Google Patents

Abstract

A hot water appliance 10 comprises a water tank 12 provided with a water tank wall 14. The hot water appliance 10 further comprises a vacuum vessel 20 which encloses a vacuum space V. The water tank 12 is wholly included in the vacuum space, and the whole water tank wall 14 is bounded by vacuum. The vacuum vessel 20 is provided with a vacuum vessel wall 22 which consists of a number of vacuum vessel wall parts that are gastightly connected with each other by welding or soldering. Further, the hot water appliance 10 comprises at least one functional pipe 100, 200, 300, 400, 500 which extends through the water tank wall 14 and is gastightly connected with the water tank wall 14 at the location of a water tank wall connection 18. The functional pipe 100, 200, 300, 400, 500 also extends through the vacuum vessel wall 22 and is gastightly connected with the vacuum vessel wall 22 at the location of a vacuum vessel wall connection 24.

Description

Hot water equipment

The present invention relates to a hot water appliance for heating and maintaining hot water at a desired temperature and which can be connected to a public water supply and to a kitchen faucet.

EP 1173715 describes a hot water installation comprising a hot water tank and a vacuum insulation. The construction of the hot water device described in this patent is particularly suitable for storing pressurized water at temperatures above 100°C, so that when the stored water is dispensed, eg via a discharge valve, the instantaneously boiling water is dispensed. The hot water tank has an electric heating element that heats the water and maintains it at the desired temperature. Also, a temperature sensor is provided, as well as a water supply pipe connectable to a public water supply system and a drain pipe connectable, for example, to a drain valve. In EP 1173715, the upper side of the sink is provided with a flange, and a removable cover is bolted to the flange. On top of the removable cover, the hot water appliance is provided with an insulating material to minimize heat loss through the cover. To further limit heat loss to the top between the hot tank and the cold outer jacket, the connection between the tank and the jacket is shown as a thin-walled annular collar with which the tank is suspended to the the casing. Due to the thermal resistance of this collar, direct heat conduction losses between the hot slot and the cold jacket are limited.

The present invention seeks to provide a hot water appliance having a better efficiency than conventional hot water appliances. That is, with such a hot water appliance, less thermal energy is lost when the hot water in the water tank of the hot water appliance is maintained at the storage temperature.

To this end, the present invention provides a hot water installation according to claim 1 . More specifically, the present invention provides a hot water equipment comprising: a sink including a sink wall; a heating element included in the sink; a vacuum vessel surrounding a vacuum space in which the tank is entirely contained, the entire tank wall being confined by the vacuum, the vacuum vessel comprising a vacuum vessel wall airtightly connected to each other by welding or welding consists of several vacuum vessel walls; and At least one functional pipe member extends through the wall of the water tank and is airtightly connected to the wall of the water tank at the position of a water tank wall connecting portion, and the functional pipe member also extends through the wall of the vacuum container and is in a The location of the vacuum vessel wall connection portion is airtightly connected to the vacuum vessel wall.

In the hot water apparatus according to the present invention, the water tank is entirely surrounded by a vacuum jacket. This is in contrast to the hot water installations described in the previous paragraphs, which are provided with insulating material on the cover of the sink and without the presence of a vacuum jacket. With the configuration according to the invention, a better insulation is obtained so that less heat loss occurs. Also, the heat conduction loss of the annular connection between the tank of the hot water plant and the vacuum jacket described in the previous paragraph does not exist because the tank is entirely surrounded by a vacuum space.

Furthermore, as described in the previous paragraphs, the hot water according to the present invention is not limited to the required insulating material due to the redundant cover, the annular connection between the groove and the vacuum jacket, and the associated insulation material above the cover of the hot water appliance. The device has a more compact and simplified and lighter construction.

Furthermore, due to the simplified construction of the hot water device according to the invention, the hot water device consists almost entirely of metal parts, since it can be recycled properly and continuously and can be produced at low cost.

The hot water plant according to the invention has particular advantages when using so-called boiling water plants. Thus, the volume typically amounts to a maximum of 20 liters, and more specifically, the volume is preferably in the range of 3 liters to 8 liters. The water in the tank is maintained at a minimum temperature of 90ºC and preferably in the range of 105ºC to 108ºC. The pressure in the vacuum space is preferably ^10-4 mbar, preferably at least ^10-5 mbar.

Assuming a tank volume of eg 3 liters and a maintenance temperature of 108°C, the hot water device according to the present invention can achieve a heat loss of approximately 2 W from the hot water tank, of which 0.5 W is conduction loss and 1.5 W is radiation loss.

In one embodiment, the sink can be exclusively carried by at least one functional tube.

By a functional pipe it is meant that a pipe must be present in any case to have a function other than carrying a sink. A functional pipe may be, for example, a water supply pipe or a drain pipe. Also, the pipe may be a pipe for which certain components are included, such as cables, an electric heating element and/or a temperature sensor. These pipes must extend inside the tank and must also pass through the walls of the vacuum vessel. Here, the tubes form a heat conduction path from the water tank to the wall of the vacuum vessel. However, it is necessary to have many of these functional pipes, and by now providing another second function of these functional pipes, namely to carry or support the water tank in the vacuum container, for this second function, the wall of the water tank and the wall of the vacuum container are connected for this second function. There is no additional thermal conduction bridge created in between.

In one embodiment, the weight of the water tank can be transferred to the wall of the vacuum vessel via at least one functional tube. In this embodiment, the vacuum vessel wall may further serve to support the entire hot water appliance on a flat surface/surface. In an alternative embodiment, the functional pipes can also be connected to an external fixed object, so that the weight of the hot water equipment is directly transferred to the external fixed object through the at least one functional pipe.

A portion of the at least one functional tube extending between the water tank wall connection portion and the vacuum vessel wall connection portion determines a heat transfer length _lh for heat conduction from the water tank wall connection portion to the vacuum vessel wall connection portion, and has a wall section area A. When a ribbed or telescopic functional tube is used, the heat transfer length l _h may be greater than the length of the tube. In one embodiment, a ratio between the heat transfer length l _h in mm and the wall cross-sectional area A in mm ² satisfies the following formula: l _h /A>4 mm ⁻¹ . Assuming a heat transfer length divided by wall cross-sectional area quotient within this range, heat conduction through the at least one functional tube can be limited such that heat loss through heat conduction through the at least one functional tube is almost negligible.

A similar slight heat loss can also be achieved with an embodiment in which the portion of the at least one functional tube extending between the water tank wall connection and the vacuum vessel wall connection has a heat transfer length _lh greater than 60 mm. In addition, the material of the at least one functional tube is preferably stainless steel or a similar metal with a relatively low thermal conductivity. Inevitably, the heat conduction from the water tank to the vacuum vessel wall via the at least one functional pipe can be neglected when the wall thickness of the stainless steel functional pipe is in the range of 0.4 to 1.0 mm and the diameter is less than 8 mm.

The sink can include a cylindrical sink sidewall, and the vacuum vessel can include a cylindrical vacuum vessel sidewall. To further increase the efficiency of the hot water appliance, in one embodiment, a stack of reflective foil and fiberglass cloth may be included at least between the sidewall of the cylindrical tank and the sidewall of the cylindrical vacuum vessel.

Further descriptions of the invention are described in the dependent claims and will be further elucidated hereinafter with reference to one or more examples of the drawings.

In the following detailed description, corresponding parts of the different embodiments are designated by the same reference numerals. This detailed description is not limited to the few examples presented in the drawings. The reference numbers indicated in the detailed description and the scope of the claims are not limiting, and are merely used to clarify the various embodiments described in the detailed description by referring to the several examples presented in the drawings.

In its broadest aspect, the present invention relates to a hot water appliance 10 including a sink 12 having a sink wall 14 . Included in the sink 12 is a heating element 28 . The hot water device 10 further includes a vacuum container 20 surrounding a vacuum space V. The entire tank 12 is contained in the vacuum space V, and the entire tank wall 14 is confined by the vacuum. The vacuum vessel 20 is provided with a vacuum vessel wall 22, which consists of several vacuum vessel parts which are hermetically connected to each other by welding or welding. Furthermore, the hot water device 10 includes at least one functional pipe 100 , 200 , 300 , 400 , 500 extending through the sink wall 14 and airtightly connected to the sink wall 14 at the location of a sink wall connecting portion 18 . The functional pipes 100 , 200 , 300 , 400 , 500 also extend through the vacuum vessel wall 22 and are airtightly connected to the vacuum vessel wall 22 at the location of a vacuum vessel wall connecting portion 24 .

The advantages of this hot water plant as indicated above in its broadest aspects have been described in the Summary of the Invention paragraph, and the advantages recited herein are understood to be incorporated herein by reference.

In one example, the embodiment schematically shown in FIG. 1 , the sink 12 may be supported by a number of supports 16 . Preferably, the supports 16 are embodied in a material that conducts heat poorly and also releases as little gas as possible, so that the vacuum in the vacuum void V is not disturbed. Also, it is preferable that the contact area between the support member 16 and the water tank 12 be as small as possible to limit the heat conduction through the support member 16 to a minimum.

As already mentioned in the above summary paragraph, in one embodiment, several examples of which are shown in FIGS. 400 and/or 500 carried. Furthermore, in a further elaboration of this embodiment, the weight of the water tank 12 can be transferred to the vacuum vessel wall 22 via the at least one functional tube 100 , 200 , 300 , 400 and/or 500 .

A portion of the at least one functional tube 100, 200, 300, 400 and/or 500 extending between the water tank wall connecting portion 18 and the vacuum wall connecting portion 24 has a heat transfer length _lh and a wall cross-sectional area A. In one embodiment, a ratio between the heat transfer length l _h in mm and the wall cross-sectional area A in mm ² may satisfy the following equation: l _h /A > 4 mm ⁻¹ .

In one embodiment, the portion of the at least one functional tube 100, 200, 300, 400 and/or 500 extending between the sink wall connection 18 and the vacuum vessel wall connection 24 may have a heat transfer length greater than 60 mm l _h . In addition, the material of the at least one functional pipe is preferably one of stainless steel, titanium or Incoloy.

In an exemplary embodiment, an example of which is shown in FIGS. 1-5 , at least one functional tube 100 , 200 , 300 , 400 and/or 500 may have an outer diameter of less than 8 mm.

Furthermore, it is preferred that at least one functional tube 100, 200, 300, 400 and/or 500 have a wall thickness between 0.4 and 1.0 mm.

In one embodiment, the previously mentioned water tank wall connection 18 between the at least one functional pipe and the water tank wall and the vacuum container wall connection 24 between the at least one functional pipe and the vacuum container wall may be welded. contact.

In an alternative embodiment, the previously mentioned sink wall connection 18 between the at least one functional tube and the sink wall and the vacuum container wall connection 24 between the at least one functional tube and the vacuum container wall may be Solder joints.

In one embodiment, examples of which are shown in FIGS. 1-5 , at least one functional pipe 100 , 200 , 300 , 400 and/or 500 may include at least one of the following items: a water supply pipe 100 , a The drain pipe 200, a pipe member 300, 400 containing an electric heating element, and a pipe member 500 containing a temperature sensor.

In one embodiment, examples of which are shown in FIGS. 1-5 , the water tank 12 may include a cylindrical water tank sidewall, and the vacuum vessel 20 may have a cylindrical vacuum vessel sidewall. In addition, at least between the side walls of the cylindrical water tank and the side walls of the cylindrical vacuum vessel, to reduce radiation losses, a stack of reflective foil and fiberglass cloth may be included.

A substantial reduction in radiation losses exists, for example, when the laminate comprises at least three layers of reflective foil and at least three layers of fiberglass cloth.

In an embodiment, an example of which is shown in FIG. 3 , FIG. 4 and FIG. 5 , at least one functional pipe part 100 , 200 , 300 , 400 , 500 can be provided with a first pipe part 102 , 202 , 302 , 402, 502; a first curved portion 104, 204, 304, 404, connecting the first pipeline portion 102, 202, 302, 402, 502 with a second pipeline portion 106, 206, 306, 406, 506, 504; a second curved portion 108, 208, 308, 408, 508 connecting the second pipeline portion 106, 206, 306, 406, 506 with a third pipeline portion 110, 210, 310, 410, 510. The first line portion 102 , 202 , 302 , 402 , 502 then extends through an upper side of the vacuum vessel 20 . The third conduit portion 110 , 210 , 310 , 410 , 510 extends through an underside of the water tank 12 . In addition, the first conduit portions 102 , 202 , 302 , 402 , and 502 extend substantially vertically between the water tank wall 14 and the vacuum vessel wall 22 .

This embodiment has the advantage that the first duct sections are particularly long so that the heat transfer to the vacuum vessel wall 22 via those first duct sections is limited to a profound extent.

In one embodiment, an example of which is shown in FIGS. 3 , 4 and 5 , the at least one functional tube includes: A first functional pipe 100 of a water supply pipe extending through a first vacuum top wall opening and airtightly connected to it, and extending through a first sink bottom wall opening and airtightly connected to it ; A second functional pipe member 200 of a drain pipe extending through a second vacuum top wall opening and airtightly connected to it, and extending through a second sink bottom wall opening and airtightly connected thereto ; A third functional tube 300 of a first heating element tube extending through and airtightly connected to a third vacuum top wall opening and extending through a third sink bottom a wall opening and hermetically connected therewith; and A fourth functional tube 400 is a second heating element tube extending through and airtightly connected to a fourth vacuum top wall opening and extending through a fourth sink bottom The wall is open and airtightly connected, wherein the third tube 300 and the fourth tube 400 are connected to each other via a spiral tube portion 28, wherein the third tube member 300, the fourth tube member 400 and the spiral tube portion 28 form an integrated one-piece part , which includes a heating element and a cable connected to the heating element.

Finally, the at least one functional tube may further comprise a fifth functional tube 500 which is a sensor tube extending through a fifth vacuum top wall opening and air-tightly connected therewith, and extending through A fifth water tank bottom wall is opened and airtightly connected with it. In the sensor tube, at least one temperature sensor and a cable connected to the temperature sensor may be included.

In one embodiment, the water tank and the vacuum vessel may each have a cylindrical configuration. In addition, each of the first, second, third, fourth and fifth vacuum vessel top wall openings may have a center located on a common pitch circle, the common pitch circle having a diameter greater than the outer diameter of the cylindrical water tank and less than The inner diameter of the cylindrical vacuum container, and its center is located on one of the vertical axes of the cylindrical vacuum container.

The first, second, third, fourth and fifth sink bottom wall openings, if any, each have a center that can lie in a common vertical plane according to one embodiment.

In an embodiment of which is shown in FIG. 5 , the first piping portion 102 , 202 , 302 , 402 , 502 between the at least one functional pipe piece 100 , 200 , 300 , 400 , 500 and the vacuum vessel wall Between 22, a spacer 30 made of a material having a thermal conductivity of less than 5 W/(m.K) may be included, such as, for example, a ceramic ring. The spacer 30 can preferably be placed adjacent to the transition between a bottom side of a water tank and a side wall of a water tank.

In an embodiment of which an example is shown in FIGS. 4 and 5 , at least one first conduit portion 102 , 202 , 302 , 402 , 502 can be exclusively one between a bottom side of a water tank and a side wall of a water tank The transition section abuts against the tank wall 12 .

In one example shown in FIG. 4 and FIG. 5 , a transition section of an upper side of a water tank and a side wall of a water tank and an upper part of at least one of the first piping parts 102 , 202 , 302 , 402 , 502 can be located at a distance from each other.

In an embodiment of which an example is shown in FIGS. 4 and 5 , at least the upper portion of the first pipe portion 102 , 202 , 302 , 402 , 502 and the upper side of the sink can be fixed relative to each other by means of a fixing element.

The fixing element can be a second spacer 32, an example of which is shown in FIGS. 4 and 5 . This second spacer 32 can maintain the water tank 12 on the one hand in a transition section adjacent to the upper side of a water tank and the side wall of the water tank, and on the other hand with the first pipeline of at least one functional pipe 100 , 200 , 300 , 400 , 500 An upper portion of the parts 102, 202, 302, 402, 502 maintains a distance from each other. The second spacer 32 then engages the sink on the one hand and the upper part of the first conduit portion 102 , 202 , 302 , 402 , 502 of the at least one functional pipe piece 100 , 200 , 300 , 400 , 500 on the other hand.

In a further elaboration of this embodiment, the engagement of the second spacer 32 of the trough can be achieved at an axial position of the trough 12 on top of the trough 12 . The joining of the second spacer 32 on the upper part of the first pipe part 102, 202, 302, 402, 502 of the at least one functional pipe piece 100, 200, 300, 400, 500 can be realized in one upper part or both upper parts 102, 402 on.

The second spacer 32 is shown in the example shown as a thin-walled element with a small cross-sectional area in order to conduct as much heat as possible from the water tank 12 to the first conduit portion 102, 402 through the second spacer 32 Small. The second spacer 32 can absorb both pressure and tension, which are related to the stability of the water tank 12 in the vacuum vessel 20, especially during transport of the hot water appliance to avoid damage.

The invention is not limited to the embodiments described, nor to the examples shown in the drawings. These drawings and reference numbers are for illustration only and not for limitation. The present invention is defined by the appended claims.

10: Hot water equipment 12: Sink 14: Sink Wall 16: Supports 18: Sink wall connection 20: Vacuum container 22: Vacuum container wall 24: Vacuum container wall connection 28: Heating element, spiral tube part 30: Spacer 32: Second spacer 100: Water supply pipe, (first) functional pipe fittings 102,402: First line section, upper 104, 204, 304, 404, 504: First bend 106, 206, 306, 406, 506: Second piping section 108, 208, 308, 408, 508: Second bend 200: Drain pipe, (second) functional fittings 202, 302, 502: First piping section 300: pipe fittings, (third) functional pipe fittings, third pipe fittings 400: pipe fittings, (fourth) functional pipe fittings, fourth pipe fittings 500: pipe fittings, (fifth) functional pipe fittings V: vacuum space

Figure 1 schematically shows a cross-sectional view of a first embodiment of a hot water appliance; Figure 2 schematically shows a cross-sectional view of a second embodiment of a hot water appliance; Figure 3 schematically shows a cross-sectional view of a third embodiment of a hot water appliance; FIG. 4 shows an example of the embodiment generally presented in FIG. 3; and FIG. 5 shows a perspective cross-sectional view of the example of FIG. 4 .

10: Hot water equipment

12: Sink

14: Sink Wall

18: Sink wall connection

20: Vacuum container

22: Vacuum container wall

24: Vacuum container wall connection

28: Heating element, spiral tube part

30: Spacer

32: Second spacer

100: Water supply pipe, (first) functional pipe fittings

200: Drain pipe, (second) functional fitting

202: The first pipeline department

204: First Bend

206: Second pipeline section

208: Second bend

300: Pipe Fittings, (Third) Functional Fittings, Third Fittings

400: Pipe Fittings, (Fourth) Functional Fittings, Fourth Fittings

500: pipe fittings, (fifth) functional pipe fittings

V: vacuum space

Claims (22)

A hot water appliance comprising: a sink including a sink wall; a heating element included in the sink; a vacuum vessel that surrounds a vacuum space in which the water tank is entirely contained, the walls of the water tank are entirely limited by the vacuum, the vacuum vessel includes a vacuum vessel wall consisting of a plurality of vacuum vessel wall portions, the The walls of the vacuum vessel are hermetically connected to each other by welding or welding; and At least one functional pipe member extending through the tank wall and airtightly connected to the tank wall at the location of a tank wall connecting portion, and the functional pipe member also extending through the vacuum vessel wall and in a vacuum vessel The location of the wall connecting portion is airtightly connected to the wall of the vacuum vessel. The hot water appliance of claim 1, wherein the sink is exclusively carried by the at least one functional pipe. The hot water apparatus of claim 2, wherein the weight of the water tank is transferred to the vacuum vessel wall via the at least one functional pipe. The hot water equipment according to any one of claims 1 to 3, wherein a portion of the at least one functional pipe member extending between the water tank wall connection portion and the vacuum container wall connection portion is determined from the water tank wall connection portion to the A heat transfer length _lh for heat conduction of the vacuum vessel wall connection portion, and has a wall cross-sectional area A, wherein a distance between the heat transfer length _lh in mm and the wall cross ^- sectional area A in mm The ratio satisfies the following equation: l _h /A > 4 mm ^-1 . The hot water appliance of any one of claims 1 to 4, wherein the portion of the at least one functional pipe member extending between the sink wall connection portion and the vacuum vessel wall connection portion has a heat transfer greater than 60 mm The length l _h , wherein the material of the at least one functional pipe piece is one of stainless steel, titanium or Incoloy, respectively. The hot water appliance of any one of claims 1 to 5, wherein the at least one functional pipe has an outer diameter of less than 8 mm. A hot water appliance as claimed in any one of claims 1 to 6, wherein the at least one functional pipe has a wall thickness between 0.4 and 1.0 mm. The hot water equipment according to any one of claims 1 to 7, wherein the water tank wall connecting portion and the vacuum container wall connecting portion are welded joints. The hot water equipment according to any one of claims 1 to 8, wherein the water tank wall connection part and the vacuum container wall connection part are welded joints. The hot water apparatus of any one of claims 1 to 9, wherein the at least one functional pipe includes a water supply pipe, a drain pipe, a pipe containing an electric heating element, and a pipe containing a temperature sensor at least one of the. The hot water appliance of any one of claims 1 to 10, wherein the water tank comprises a cylindrical water tank side wall, and wherein the vacuum container comprises a cylindrical vacuum container side wall, wherein at least between the cylindrical water tank side wall and the cylindrical water tank side wall A stack of reflective foil and fiberglass cloth is included between the side walls of the cylindrical vacuum vessel. The hot water appliance of claim 11, wherein the laminate comprises at least three layers of reflective foil and at least three layers of fiberglass cloth. The hot water equipment according to any one of claims 1 to 12, wherein the at least one functional pipe member comprises a first pipeline portion, a first pipeline portion connecting the first pipeline portion and a second pipeline portion a curved portion, and a second curved portion connecting the second pipeline portion with a third pipeline portion; wherein the first pipeline portion extends through an upper side of the vacuum container; wherein the third conduit portion extends through a bottom side of the water tank; Wherein the first pipeline portion extends substantially vertically between the wall of the water tank and the wall of the vacuum container. The hot water appliance of claim 13, wherein the at least one functional pipe element comprises: It is a first functional pipe part of a water supply pipe, which extends through a first vacuum top wall opening and is airtightly connected with the first vacuum top wall opening, and extends through a first sink bottom wall opening and is connected with the first water tank bottom wall. The bottom wall opening of the first water tank is air-tightly connected; A second functional pipe part of a drain pipe, which extends through a second vacuum top wall opening and is airtightly connected to the second vacuum top wall opening, and extends through a second sink bottom wall opening and is connected with The bottom wall opening of the second water tank is air-tightly connected; A third functional tube part of a first heating element tube extending through and airtightly connected to a third vacuum top wall opening and extending through a third sink bottom The wall is open and airtightly connected with the bottom wall opening of the third water tank; A fourth functional tube of a second heating element tube extending through a fourth vacuum top wall opening and airtightly connected to the fourth vacuum top wall opening, and extending through a fourth sink bottom The wall is open and air-tightly connected with the bottom wall opening of the fourth water tank, wherein the third functional pipe part and the fourth functional pipe part are connected to each other through a spiral pipe part, wherein the third functional pipe part, the fourth functional pipe part the flexible tube and the helical tube portion form an integrated one-piece component that includes a heating element and a cable connected to the heating element; and A fifth functional tube of a sensor tube extending through and airtightly connected to a fifth vacuum top wall opening and extending through a fifth sink bottom wall opening It is air-tightly connected to the opening of the bottom wall of the fifth water tank, wherein the sensor tube includes at least one temperature sensor and a cable connected to the temperature sensor. The hot water appliance of claim 14, wherein the water tank and the vacuum vessel each have a cylindrical configuration, wherein the first vacuum vessel has an opening on the top wall, the second vacuum vessel has an opening on the top wall, and the third vacuum vessel has an opening. The top wall opening, the fourth vacuum container top wall opening and the fifth vacuum container top wall opening each have a center located on a common pitch circle, and the diameter of the common pitch circle is larger than an outer diameter of the cylindrical water tank, and is smaller than the inner diameter of the cylindrical vacuum vessel, and the center of the common pitch circle is located on a vertical axis of the cylindrical vacuum vessel. The hot water equipment of claim 14 or 15, wherein the first water tank bottom wall opening, the second water tank bottom wall opening, the third water tank bottom wall opening, the fourth water tank bottom wall opening and the fifth water tank The bottom wall openings each have a center in a common vertical plane. The hot water equipment as claimed in any one of claims 13 to 16, wherein a first spacer is included between the first pipe portion of the at least one functional pipe and the wall of the vacuum container, which is composed of a thermally conductive Made of a material with a coefficient of less than 5 W/(m.K), such as, for example, a ceramic ring. The hot water apparatus of any one of claims 13 to 17, wherein the at least first conduit portion exclusively abuts against a water tank wall at a transition section between a water tank bottom side and a water tank side wall. The hot water equipment of claim 17 or 18, wherein a transition section between an upper side of a water tank and a side wall of the water tank and an upper portion of the at least first piping portion are located at a distance from each other. The hot water equipment as claimed in claim 19, wherein the upper portion of the at least first pipe portion and the upper side of the water tank are fixed relative to each other by a fixing element. A hot water appliance as claimed in claim 20, wherein the fixing element is shown as a second spacer which, on the one hand, maintains the sink adjacent to a transition between the upper side of the sink and the side wall of the sink, and on the other hand is connected to the sink. An upper portion of the first conduit portion of the at least one functional pipe piece maintains a distance from each other, and engages the sink on the one hand and engages the upper portion of the first conduit portion of the at least one functional conduit piece on the other hand. The hot water appliance of claim 21, wherein the engagement of the second spacer of the sink is achieved on the upper side of the sink at the position of the axis of the sink, and wherein the at least one functional pipe The engagement of the spacer of the upper portion of the first conduit portion is effected on one upper portion or both upper portions.

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