US20140237714A1 - Heat exchanger, shower tray and method for producing a shower tray - Google Patents

Heat exchanger, shower tray and method for producing a shower tray Download PDF

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Publication number
US20140237714A1
US20140237714A1 US14/126,559 US201214126559A US2014237714A1 US 20140237714 A1 US20140237714 A1 US 20140237714A1 US 201214126559 A US201214126559 A US 201214126559A US 2014237714 A1 US2014237714 A1 US 2014237714A1
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United States
Prior art keywords
shower tray
pipes
tray
base
shower
Prior art date
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Abandoned
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US14/126,559
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English (en)
Inventor
Christoph Rusch
Marcel Aeschlimann
Christopher Rast
Reto Schmid
Martin SIGRIST
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JOULIA AG
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JOULIA AG
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Filing date
Publication date
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Assigned to JOULIA AG reassignment JOULIA AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RAST, CHRISTOPHER, SIGRIST, MARTIN, AESCHLIMANN, MARCEL, RUSCH, CHRISTOPH, SCHMID, RETO
Publication of US20140237714A1 publication Critical patent/US20140237714A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K3/00—Baths; Douches; Appurtenances therefor
    • A47K3/28—Showers or bathing douches
    • A47K3/40—Pans or trays
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
    • F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0012—Recuperative heat exchangers the heat being recuperated from waste water or from condensates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/02—Fastening; Joining by using bonding materials; by embedding elements in particular materials
    • F28F2275/025—Fastening; Joining by using bonding materials; by embedding elements in particular materials by using adhesives

Definitions

  • the present invention generally relates to heat exchangers and, more particularly, to a shower tray as well as to a method for manufacturing a shower tray.
  • Such a shower tray is known, for example, from WO 2010/088784 A1 of the same applicant.
  • the heat exchanger comprises a plane cover plate as a run-off surface, over which waste water runs off
  • the cover plate is formed from chrome steel, forms the base of the shower tray and can be integrally formed with the shower tray.
  • the plate either consists of two layers, of which the one is profiled and is placed below the other, by which means meandering channels are defined between the plates, or pipes through which water to be heated flows, are soldered against a plate.
  • DE 44 06 971 shows a shower tray, on whose lower side channels, through which cold water flows, are attached by way of welding on pipes (tubes) or profiles.
  • NL 1031082 shows a heat exchanger below a shower tray, with which pipes are soldered via a narrow web onto a run-off surface.
  • WO 2009/030503 describes the manufacture of thermal solar collectors, with which heat fluid pipes are welded onto an absorber plate with a laser.
  • GB2420973 shows a shower tray with a heat exchanger with an undercut tray wall, into which an elastic region of an insertable tray base snaps.
  • a further undercut region of the tray edge can cooperate with projections of the tray base, in order with a rotation of the tray base, to lock or release this.
  • the construction height is too high and the cleaning too difficult with existing heat exchangers of this type.
  • the cleaning is also technically relevant, since the cleanliness of the heat exchanger has a large influence on the efficiency of the heat exchanger.
  • the manufacture is complicated and the material weight very large.
  • a further object is to provide a suitable manufacturing method for such a shower tray.
  • a shower tray with a heat exchanger wherein the heat exchanger is arranged below the shower tray for a heat recovery from waste water, for heating fresh water, wherein a first heat exchanger surface is in contact with the waste water, and a second heat exchanger surface is in contact with the fresh water, and the first heat exchanger surface forms the base or a part of the base of the shower tray.
  • the shower tray is manufactured of aluminium or of an aluminium alloy. Metal alloys which have a weight component of at least 80% aluminium are considered as aluminium alloys. Hereinafter, when one speaks of aluminium, this is also to be understood as an aluminium alloy. It is also possible to manufacture the tray from a metal with a thermal conductivity of above 100 W/(mk).
  • the second heat exchanger surface is formed by pipes (tubes), which are connected to the base of the shower tray by way of a material-fit connection, in particular welding or soldering
  • intermediate spaces are present between the base and one or more plates, for example of metal.
  • the intermediate spaces form channels for leading the fresh water, as described in the already mentioned WO 2010/088784, which is herewith included by way of reference, in particular with its FIGS. 2-6 and 9 and the respective description parts.
  • the pipes are composite pipes (or dual pipes) with an outer layer of aluminium or of an aluminium alloy and with an inner layer of copper or a copper alloy.
  • Copper alloys which have a weight component of at least 50% copper are considered as copper alloys.
  • a copper alloy is also meant when one speaks of copper.
  • a copper pipe is welded onto the tray base of aluminium, in particular by way of laser welding.
  • a weldable anodising layer is formed on the tray base preferably beforehand.
  • the shower tray and the outer side of the pipes are anodised.
  • the pipes are closed with a cap, for example, during the anodisation, so that the copper layer in the pipes is not dissolved by the anodisation bath.
  • the anodising is effected after the welding, by which means the welding procedure is simplified. The other way round however would make the connection of the pipes to connection elements of copper after the anodising more complicated, since the occurrence of a galvanic element is to be prevented.
  • an edge region of the shower tray comprises a further or a reinforced coating, in particular a layer produced by powder coating, for example with aluminium oxide, or paint layer.
  • a further or a reinforced coating in particular a layer produced by powder coating, for example with aluminium oxide, or paint layer.
  • the complete shower tray comprises a coating that permits a corrosion protection or wear protection, and/or a wetting of the surface (hydrophilic coating).
  • the shower tray is shaped by way of a forming process, in particular by way of deep-drawing or hydroforming or by way of superplastic deformation. It can additionally also be formed by bending and welding individual sections of the shower tray.
  • aluminium as a base material leads to a series of advantageous that synergistically complement one another and that improve the efficiency and the manufacturability.
  • hydroforming for shaping the tray, and anodising as a surface treatment is advantageous: drawing traces on the upper side of the tray which arise with normal forming with a male and female die, would have to be subsequently treated or be laminated by a material-depositing method (coating, painting). Essentially no such drawing marks arise on hydroforming a tray (or not in a region where they disturb), and thus an anodisation can take place, without the trough surface having to be subjected to post-treatment.
  • different variants of shower trays can be manufactured in the same shape. These variants have the same shape of the recess with the shower base and the heat exchanger, but differently large outer edge regions as standing surfaces around these. A set of shower trays having different variants can be manufactured in this manner.
  • a further advantage of the manufacture by way of hydroforming is that undercut portions can be shaped in a particularly simple manner, thus without the use of slides.
  • the shower tray comprises a cover (lid), and moreover a first edge and a second edge, wherein the first and the second edge lie opposite one another, and wherein an inclined support region for supporting the cover is present on the first edge, and an undercut edge region is present on the second edge of the shower tray which lies opposite the first edge.
  • the cover due to the inclination in the support region is pressed into the undercut region when loaded.
  • no undercut regions are present in the support region, and the cover can be lifted upwards without further ado.
  • the cover cannot be lifted without previously pulling the cover in the horizontal direction towards the second edge, out of the undercut region.
  • reinforcement profiles are arranged on the lower side of the shower tray.
  • the shower tray can be designed thinner and lighter by way of this.
  • the reinforcement profiles can be welded to the shower tray or bonded to this.
  • the reinforcement profiles can have a U-profile and thus encompass or bridge one or more of the pipes. This necessitates the reinforcement profiles being attached on the shower tray after attaching the pipes.
  • a shower tray Preferably, the following steps are carried out for manufacturing a shower tray:
  • This insulation layer prevents a flow of charge carriers in the region between the outer layer of the pipes (for example aluminium) and the manifolds or transition pipes (for example of a copper alloy) and the formation of a galvanic element in the case that this region should become contaminated and/or moist.
  • the transition pipes for example, are of copper.
  • the insulation layer for example, is formed by a shrink hose or by a coating in the region of the connection between the manifolds or transition pipes and a section of the pipes or their outer (aluminium) layer.
  • the method for manufacturing a shower tray in particular with the use of hydroforming, can be carried out in a repeated manner, wherein shower trays with outer edge regions extended to a differently far extent are manufactured, wherein such outer edge regions connect to edge regions of a recess of the shower tray. These outer edge regions form a standing surface after the installation of the shower tray.
  • shower trays for showers with differently large standing surfaces can be manufactured with the same forming tool.
  • a shower tray with a heat exchanger wherein the heat exchanger is arranged below the shower tray for a heat recovery from waste water for heating fresh water, wherein a first heat exchanger surface is in contact with the waste water and a second heat exchanger surface is in contact with the fresh water, and the first heat exchanger forms the tray base or a part of the tray base.
  • the shower tray is manufactured of a steel alloy, and a base pate, also called sheet plate or heat exchanger plate, of a different material is fastened in the region of the tray base below the shower tray, on the tray base, by which means a thermally conductive connection to the tray base is formed essentially over the compete surface of the base plate.
  • pipes are connected to this base plate by way of a material-fit connection, below this base plate, in particular by way of welding or soldering, wherein these pipes form the second heat exchanger surface.
  • the heat exchanger plate is fastened on the lower side of the tray base by way of a fixed connection, preferably by way of a bonding or welding method, for example with a bonding film or by way of an epoxy resin.
  • the welding method can be friction welding.
  • the epoxy resin can have added aggregates for increasing its thermal conductivity.
  • the shower tray comprises an enamel layer on the upper side, and is not enamelled on the lower side, wherein ribs for the mechanical stabilisation of the shape of the tray base are arranged on the lower side.
  • ribs for example are about 10 mm high and stabilise the tray base during the enamelling: they prevent a warping, which would bulge out the tray base to the top or to the bottom, whereupon the waste water would no longer run off over the tray base in a uniform manner.
  • the enamel layer has added aggregates (additives) for improving its thermal conductivity, in particular added metal particles.
  • additives for improving its thermal conductivity, in particular added metal particles.
  • Inox stainless steel
  • CrNi steel Although such steels seen per se are poor heat conductors, as aggregates on enamelling they surprisingly lead to an improvement of the thermal conductivity of the enamel.
  • an enamel layer can also be applied independently of the application of the heat exchanger, for example, for coating cooking utensils.
  • an enamel layer is created that has a comparatively high thermal conductivity.
  • the shower tray according to the first aspect of the invention can be understood and realised completely independently of a shower tray according to the second aspect of the invention.
  • the method for manufacturing a shower tray of a steel alloy comprises the following steps
  • the ribs are coated, in particular by way of painting, in a further step for the corrosion protection.
  • the following steps are carried out for enamelling the shower tray
  • a semifinished product for manufacturing the shower tray is created. This comprises a plane base plate with pipes welded thereon.
  • the base plate comprises cut-outs for leading through ribs of the shower tray.
  • the heat exchanger for example has a width of between 50 cm and 150 cm and a length between 50 cm and 150 cm.
  • the width and length according to one embodiment are at least approximately equal to 75 cm.
  • the term “shower tray” in this application is understood to comprise the term “bath tub”.
  • the shower tray is thus a bath tub.
  • the heat exchanger for example has a width of between 20 cm and 70 cm and a length between 80 cm and 200 cm.
  • a pipe distance between the pipes of the heat exchanger which run in parallel is 1 cm to 5 cm or 2 cm to 5 cm, in particular at least approximately 2.4 cm (measured from pipe middle to pipe middle), in the embodiments of both aspects of the invention.
  • the pipe distance in contrast to pipes of heat exchanger in solar collectors, where greater temperature gradients are present, the pipe distance in particular is smaller than 7 cm.
  • the distances between welding spots are also about 2 mm (from middle to middle of the welding spots), wherein for example the welding spots themselves have a diameter of less than 2 mm, and the pipe diameters are smaller, i.e. with inner diameters of between 4 mm and 10 mm, in particular 4.75 mm.
  • manifolds to which the pipes are connected, are arranged outside the run-off surface. In this manner it is possible for an as large as possible surface of the run-off surface to act as a heat exchanger.
  • the gradient of the tray base for example is between 3% and 4.5%, in particular 3.5%. This applies to the tray base in the assembled condition. This therefore also applies to the angle between the upper edges of the tray and the tray base, amid the assumption that the edges of the tray are to be assembled horizontally. A particularly good heat transfer results with this gradient, unexpectedly better than with a smaller angle, such as 2% for example.
  • FIG. 1 a shower tray in a first embodiment
  • FIG. 2 a shower tray in a second embodiment
  • FIG. 3 a cross section of the construction of a heat exchanger with a shower tray of aluminium
  • FIGS. 4 and 5 cross sections of the construction of a heat exchanger with a shower tray of steel
  • FIG. 6 a shower tray with a projection for the arrangement of a run-off
  • FIG. 7 a base plate with heat exchanger pipes
  • FIGS. 8 and 9 a shower tray in a third embodiment
  • FIG. 10 variants of edge regions to a shower tray
  • FIG. 11 a shower tray with an undercut edge region.
  • FIG. 1 shows a shower tray 10 in a first embodiment in an exploded drawing.
  • the shower tray 10 is designed as a heat exchanger 1 , by way of a tray base 12 , over which waste water flows during showering, being connected in a thermally conductive manner to pipes 14 , through which fresh water is led.
  • the pipes 14 for this extend over an as large as possible part of the tray base 12 .
  • the fresh water is fed to the pipes 14 through a feed conduit 22 and a first manifold 21 , and there is distributed to several (two, three, four, five, six or more) parallel pipes 14 , flows in the counter direction to the waste water or in the same direction through meandering pipes 14 to a second manifold 21 .
  • the pipes 14 are led to one another in an essentially equidistant manner, by which means a balanced heat transfer over the surface takes place.
  • the pipes 14 are distanced to one another in the region, in which they run transversely to the gradient of the tray base 12 , as well as in the region, in which they run parallel to the gradient.
  • the distance of the pipes 14 is between 20 mm and 30 mm, for example 24 mm (measured from middle to middle).
  • the sections of the individual pipes 14 between the manifolds 21 are all equally long, so that their flow resistance and thus also their flow is essentially the same.
  • Transition pipes 20 can be arranged at the transition between pipes 14 and manifolds 21 for reasons of manufacturing technology.
  • the waste water flow over a slightly inclined cover 4 to one side of the shower tray 10 to a run-in region 33 , and from this in turn, in a manner distributed over the width of the tray base 12 , over the tray base 12 to a run-off region 34 and from there to a run-off 35 .
  • An edge region 32 which is preferably led around the shower tray 10 , is designed obliquely with an angle of between about 40° to 70°. Height-adjustable feet 132 can be present for setting the level of the shower tray 10 on installation.
  • the cover 4 is designed with a corresponding inclination at its cover edge 342 .
  • the edge region 32 on account of this forms a seat that is trapezoidal in cross section, for a cover 4 , and centres this cover in the shower tray 10 .
  • FIG. 2 shows a shower tray in a second embodiment in an exploded drawing.
  • the tray base 12 comprises webs or ribs 31 for reinforcement.
  • a sheet-metal plate, hereinafter called base plate, 13 is arranged between the tray base 12 and the pipes 14 .
  • This base plate 13 comprises cut-outs 23 that correspond to the position of the ribs 31 , i.e. are cut-out in each case in the region of a rib 31 , so that the base plate 13 can be fastened flatly onto the lower side of the tray base 12 .
  • Bent-down or integrally formed side walls 37 can be present at the edge of the shower tray 10 .
  • FIG. 3 shows a cross section of the construction of a heat exchanger with a shower tray 10 of aluminium, as a rule an aluminium alloy.
  • the shower tray is preferably manufactured as one piece by way of a forming process, in particular inner high pressure forming (hydroforming), and/or by way of cutting, bending and welding, and thus the tray base 12 is also of this material.
  • Warm waste water 145 flows over the tray base 12 in operation.
  • pipes 14 with fresh water 144 for example in an arrangement according to FIG. 1 or 2 , are welded in particular by way of laser welding, or soldered, directly against the lower side of the tray base 12 .
  • Contact regions of soldering locations or welding spots 143 thereby have a diameter d of preferably less than 2 mm.
  • the distance between welding spots 143 is at least approximately 1 mm (along the direction of the pipe).
  • the distance of the welding spots lies in the region between 1.5 mm and 2.5 mm, in particular at 2 mm (in each case measured from the middle of a welding spot up to the middle of the next welding spot). An improved heat transfer results with this. A greater distance worsens the efficiency of the heat exchanger and smaller distance does not improve it significantly.
  • the diameter of a welding spot is thereby preferably smaller than 2 mm, in particular approx 1 mm
  • the pipes 14 are manufactured of aluminium or of an aluminium alloy. Preferably they are moreover coated on the inner side, for example with polyethylene (PE).
  • the pipes 14 are composite pipes (bimetal pipes, composite pipes, dual pipes) with an outer wall or an outer layer 141 of aluminium or of an aluminium alloy and with an inner wall or inner layer 142 of copper or a copper alloy, for example of copper deoxidised by phosphorous (Cu-DHP).
  • Exemplarily applied composite pipes have a wall thickness of approx. 0.55 mm aluminium (alloy) and 0.25 mm copper (alloy) with an outer diameter of approx. 6.5 mm (1/4′′ inch; 6.35 mm) The inner diameter is thereby approx. 4.75 mm.
  • the shower tray 10 and thus also the tray base 12 and the pipes 14 are preferably anodised (eloxised), in particular hard-anodised, and by way of this are wear-resistant and at the same time thermally conductive.
  • the edge of the tray that is visible next to the cover 14 can be coated or painted in a different colour.
  • the tray base 12 can be painted at least on the waste water side, thus the upper side, preferably with a hydrophilic paint.
  • FIG. 10 schematically shows shower trays 10 with different variants of outer edge regions 36 .
  • Such variants are manufacturable in the same shape by way of forming, in particular hydroforming
  • the shape of the recess of the tray with the tray base 12 and the heat exchanger 1 is the same with this variant, and an outer edge region 16 connecting to the recess is designed in a manner extending differently far in one or more directions.
  • these outer edge regions 36 are essentially horizontal and form a stepping surface.
  • Variants can be manufactured in this manner for example, with which the base area is 90 cm times 90 cm (standard size), or 90 cm times 120 cm, or 90 cm times 140 cm. What are not shown are optional lateral additional regions which are bent downwards, in order to form side walls 37 such as in the embodiment of FIGS. 8-9 , for example.
  • the shower tray 10 is rust-free of stainless steel, in particular CrNi steel, and the pipes 14 of copper or a copper alloy are welded on.
  • Such an arrangement however has a reduced efficiency as a heat exchanger.
  • FIG. 4 shows a cross section of the construction of a heat exchanger with a shower tray 10 of steel, as a rule from enamelled steel.
  • the shower tray 10 is preferably manufactured as one piece by a forming process and/or by cutting, bending and welding, and thus the tray base 12 is also of this material.
  • Warm waste water 145 flows over the tray base 12 in operation.
  • Pipes 14 with fresh water 144 for example in an arrangement according to FIG. 1 or 2 , are welded, in particular by laser welding, or soldered, against the lower side of a base plate 13 , below the tray base 12 .
  • Contact regions of solder locations or welding spots 143 thereby have a diameter d of preferably less than 2 mm. Standards for potable water can be adhered to by way of this.
  • the base plate 13 in turn is bonded against the tray base 12 by way of an adhesive layer 15 .
  • a cover layer, typically paint or enamel layer 16 is deposited on the upper, i.e. water-water-side of the tray base 12
  • the material of the base plate 13 and pipes 14 is preferably essentially the same or of the same type, thus for example in each case aluminium (alloy) or in each case copper (alloy). They can be more easily connected to one another by way of this, in particular by way of welding or soldering.
  • the pipes 14 for example are composite pipes, as described above, thus are of aluminium or an aluminium alloy at least at the outer side of the pipes.
  • the adhesive or bonding layer 15 on the one hand effects a compensation of different expansion of the tray base 12 and base plate 13 on heating, and on the other hand the heat transfer from the tray base 12 to the pipes 14 .
  • the bonding layer 15 is formed by a bonding film, i.e. by a bonding material which is provided as a thin layer or foil, for example of a thermoplastic material. It can have added aggregates or be strewn with aggregates (on one or both sides), for improving its thermal conductivity, in order to improve the thermal conductivity of the bonding foil.
  • aggregates for example are powder of a metal (aluminium, copper, etc . . . ) or of a carbide or boride (SiC, TiC, TiB 2 ).
  • the adhesive layer 15 is an epoxy resin which can likewise have added one of the mentioned materials as an aggregate for improving the thermal conductivity.
  • the parent substance for the enamel layer 16 is provided with a material for improving the thermal conductivity before the enamelling.
  • this material is a rust-free stainless steel (Inox), in particular a CrNi steel.
  • the shower tray 10 With the manufacture of the enamel layer, at least of a ground enamel layer, the shower tray 10 must be enamelled as a whole. Ribs 31 can be welded or soldered on below the tray base 12 , in order to prevent a deformation of the shower tray 12 at the high temperatures (850° C.) on enamelling. The lower side of the tray base 12 is sand blasted, or the enamel layer removed in another manner before bonding on the base plate 13 with the pipes 14 . The ribs 31 finally receive a new corrosion protection in place of the removed enamel layer.
  • FIG. 6 shows one embodiment, in which the run-off 35 is arranged next to the run-off surface 17 acting as a heat exchanger.
  • the run-off surface 17 in particular forms a rectangle (or a circle or an oval), and the run-off is not arranged within this rectangular shape (or a circle or oval).
  • the complete run-off surface 17 is available as a heat exchanger surface.
  • a more regular leading of the for example meandering pipes over the run-off surface is possible, since there is no interruption of the rectangular (or circular or oval-shaped) surface due to the run-off.
  • the heat transfer is improved by way of this.
  • FIG. 7 accordingly shows a base plate 13 with an essentially rectangular contour, wherein the pipes 14 are arranged essentially outside this contour for the connection of manifolds 21 (dashed).
  • the run-off 35 in particular can be arranged at a projection 18 of the shower tray 10 , so that the base mass of the shower tray 10 is not affected.
  • a suitable opening in the wall 19 for example a lightweight construction wall, behind which conduits are led, is merely to be provided in the region of the projection 18 .
  • the run-off region 34 is a channel or recess, which leads the waste water to the run-off 35 .
  • a projection 18 and the further features described here with regard to the FIGS. 6 and 7 can be combined with other features of the embodiment according to FIG. 1 as well as FIG. 2 .
  • FIGS. 8-9 show a shower tray in a third embodiment in a plan view and a lower view.
  • the individual elements inasmuch as not described otherwise, are designed as with the embodiment of FIG. 1 , in particular with a tray of aluminium or an aluminium alloy.
  • a contrast with regard to FIG. 1 is the fact that the shower tray has no pronounced run-off channel towards the run-off, but a transverse gradient or drop, for example in the shape of a triangle.
  • the tray base can have a gradient of 3.5% in the main flow direction.
  • additional reinforcement profiles 131 are present, which are fixedly connected to the lower side of the tray base 12 , in particular by way of bonding, soldering or welding.
  • the reinforcement profiles 131 for reasons of manufacturing technology are bonded onto the lower side of the tray base 12 , for example with an epoxy adhesive.
  • the reinforcement profiles 131 comprise a U-profile with additional flanges that form the connection to the tray base.
  • the reinforcement profiles 131 each at the two ends of the two arms of the U-profile (seen in cross section) are connected to the lower side of the tray base.
  • the reinforcement profiles 131 extend parallel to sections of the pipes 14 and thereby encompass one or more of the pipes 14 .
  • the pipes 14 thus lead through the U-profile of the reinforcement profiles 131 .
  • the reinforcement profiles 131 stiffen the tray base and this permit these to be designed of thinner material.
  • the reinforcement profiles 131 serve as a protection of the pipes 14 from damage on the building side, for example on putting down the heat exchanger onto an uneven surface.
  • Connections 24 for the feed and discharge of water to/from the heat exchanger are for example arranged next to one another on the same side wall 37 .
  • FIG. 11 shows a shower tray 10 with an undercut edge region 38 . This lies opposite a bevelled support region 39 . These two regions form a seat for the cover 4 .
  • the edge is recessed in an undercut manner in the undercut region 38 at a side of the shower tray 10 , seen in a in a cross sectional plane running perpendicularly to the edge. It forms an indentation by way of this, in which the edge of the cover 4 lies. The result of this is that the cover 4 at this location cannot be moved perpendicularly upwards, but for this must be firstly pulled out of the indentation a little, in the direction of the opposite side of the tray.
  • the support region with respect to the normal in particular 45° and 70° and especially of 60°.
  • the cover 4 thus lies on the support region 39 and can be lifted there without further ado.
  • the cover 4 on loading is pressed into the indentation due to the inclination of the support region 39 .
  • the design of the edge regions according to FIG. 11 can be combined with all described variants of shower tray, in particular with this of FIG. 1 , 2 and 8 or 9 .

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  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Laser Beam Processing (AREA)
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CH59/12 2012-01-11
PCT/CH2012/000127 WO2012171129A2 (de) 2011-06-17 2012-06-07 Wärmetauscher, duschwanne und verfahren zur herstellung einer duschwanne

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PL424685A1 (pl) * 2018-02-27 2019-09-09 Politechnika Rzeszowska im. Ignacego Łukasiewicza Poziomy prysznicowy wymiennik ciepła
IT202000023503A1 (it) * 2020-10-06 2022-04-06 Energy Plus Project Di Dorigo Michele Serbatoio di scambio di calore
US20220316803A1 (en) * 2021-04-06 2022-10-06 Intellihot, Inc. Heat recovery system adaptable to a sink
US20230011599A1 (en) * 2021-07-06 2023-01-12 Schmöle GmbH Apparatus and method for heat recovery from service water
EP4306728A1 (de) * 2022-07-14 2024-01-17 Bette GmbH & Co. KG Sanitärwanneninstallation und installationseinrichtung
EP4400797A1 (en) * 2023-01-10 2024-07-17 Kohler Mira Limited Wastewater heat recovery systems
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US20160001345A1 (en) * 2014-04-30 2016-01-07 Ford Global Technologies, Llc Value stream process for forming vehicle rails from extruded aluminum tubes
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US10006645B1 (en) * 2017-01-27 2018-06-26 Paul A. Howard Greywater heat recovery with warm side agitation
PL424685A1 (pl) * 2018-02-27 2019-09-09 Politechnika Rzeszowska im. Ignacego Łukasiewicza Poziomy prysznicowy wymiennik ciepła
IT202000023503A1 (it) * 2020-10-06 2022-04-06 Energy Plus Project Di Dorigo Michele Serbatoio di scambio di calore
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US20230011599A1 (en) * 2021-07-06 2023-01-12 Schmöle GmbH Apparatus and method for heat recovery from service water
EP4306728A1 (de) * 2022-07-14 2024-01-17 Bette GmbH & Co. KG Sanitärwanneninstallation und installationseinrichtung
EP4400797A1 (en) * 2023-01-10 2024-07-17 Kohler Mira Limited Wastewater heat recovery systems
WO2024175825A1 (es) * 2023-02-24 2024-08-29 Cerian Shower, S.L. Sistema recuperador de calor para un plato de ducha, bañera o similar y plato de ducha provisto de dicho sistema
USD1107199S1 (en) 2023-06-08 2025-12-23 Ipex Technologies Inc. Heat exchange device

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CA2838494A1 (en) 2012-12-20
CH705186A2 (de) 2012-12-31
WO2012171129A2 (de) 2012-12-20
EP2720591B1 (de) 2018-01-17
WO2012171129A3 (de) 2013-04-25
JP2014523511A (ja) 2014-09-11
EP2720591A2 (de) 2014-04-23
CN103826514A (zh) 2014-05-28

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