EP1565690B1 - Wärmetauscher und brauchwassererhitzer - Google Patents

Wärmetauscher und brauchwassererhitzer Download PDF

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Publication number
EP1565690B1
EP1565690B1 EP03786013A EP03786013A EP1565690B1 EP 1565690 B1 EP1565690 B1 EP 1565690B1 EP 03786013 A EP03786013 A EP 03786013A EP 03786013 A EP03786013 A EP 03786013A EP 1565690 B1 EP1565690 B1 EP 1565690B1
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EP
European Patent Office
Prior art keywords
coil
enclosure
primary fluid
turns
hot water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03786013A
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English (en)
French (fr)
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EP1565690A1 (de
Inventor
Joseph Le Mer
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Giannoni France
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Giannoni France
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Publication date
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Publication of EP1565690A1 publication Critical patent/EP1565690A1/de
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Classifications

    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1021—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a by pass valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F24D3/087—Tap water heat exchangers specially adapted therefore
    • 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
    • F28D7/02—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 helically coiled
    • F28D7/024—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 helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical 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
    • F28F2240/00—Spacing means

Definitions

  • the present invention relates to a heat exchanger and a device for domestic production of hot water, equipped with such an exchanger.
  • a first solution is to produce hot water with a balloon whose volume can vary from a few tens to a few hundred liters.
  • the reservoir of water accumulated in this flask is heated by an electrical resistance or by a coil through which the fluid of the primary circuit of a heat exchanger of a boiler or fuel oil or gas.
  • the main advantage of such a balloon is that it allows to have a large flow of hot water as it is not empty, so it is possible to open at the same time several taps in the dwelling.
  • a second technical solution is the so-called "instant" production of domestic hot water, that is to say as and when required.
  • FIGS. 1 and 2 attached to this patent application are diagrams which illustrate a domestic installation according to the state of the art, allowing such instantaneous production of hot water.
  • This comprises a primary central heating circuit I and a secondary sanitary drawing circuit II , which interfere with one another at a device D for producing hot water.
  • the latter comprises a small volume balloon B containing a coil S, of circular section, at which heat exchange occurs.
  • the primary circuit I comprises a heating source 1 of the water of this circuit; it is for example a boiler provided with a gas burner.
  • a suitable pump 15 ensures the circulation of water in this circuit I.
  • the return pipework comprises two pipes 12, 13 separated by a three-way valve V ; the pipe 13 is connected to the boiler 1 after passing through the pump 15 via a pipe 14.
  • the central heating water constitutes the primary fluid;
  • the hot water production device D is connected in parallel with the radiators 100, the bypass being upstream of these radiators via the " R " connection "T" and, downstream, by the three-way valve V.
  • references a and b designate the inlet and outlet orifices for the primary fluid inside the hot water production device D.
  • the "T" connector R is connected to the inlet port a by a pipe 16; the outlet orifice b is connected to the three-way valve V via a pipe 17.
  • reference EF has been designated a source of cold water production; it may be for example a tap connected to the drinking water network provided in the dwelling receiving this installation.
  • EC has designated a device for using hot water; it is for example a faucet or a shower head for supplying hot water to the user.
  • references c and d denote the inlet and, respectively, outlet mouths of the secondary fluid, here the water of the sanitary circuit.
  • the source EF is connected to the mouth c by a cold water supply pipe 19, while the outlet mouth d is connected to the hot water utilization device EC by a water distribution pipe hot 18.
  • the three-way valve V is in a position such that the lines 12 and 13 are placed in communication, the pipe 17 being on the other hand insulated.
  • the figure 2 illustrates the situation in which a draw of domestic water is required, for example by the opening of a valve provided in the EC use device.
  • This drawing automatically switches, via a suitable control system known per se, the three-way valve V , so as to close the outlet of the pipe 12, while providing the communication of the pipe 17 with the pipe 13.
  • the hot water does not pass through the radiators 100 since the outlet of the pipe 12 is closed, but only inside the tank B and returns to the boiler 1, via the lines 13 and 14 and the pump 15.
  • the water of the secondary circuit II travels the coil S of the entry c to the exit d , as symbolized by the arrows H , that is to say against -current of the water of the primary circuit circulating in the balloon B.
  • the heat exchange takes place between the hot water of the primary circuit present inside the balloon B and the cold water penetrating inside the coil S ; it is therefore hot water that reaches the use device EC .
  • the water leaves the boiler 1 at a temperature of about 80 ° C and returns to a temperature between 40 and 60 ° C depending on the setting of the radiators 100.
  • the cold water entering inside the coil S is at a temperature of the order of 15 ° C and the hot water obtained inside the utilization device EC is at a temperature of the order of 45 ° C.
  • the three-way valve V switches back to its initial position, which makes it possible to supply the radiators 100.
  • the instantaneous flow rate of hot water that can be obtained continuously with such an installation depends on the thermal exchange performance of the device D. But these are not optimal because the coil S is circular right section. As a result, it is impossible to obtain hot water from several taps at the same time.
  • the coil S tends to scale up quickly.
  • the axial size of a coil of round section is important, so that the dimensions of the balloon B containing it are also.
  • the three-way valve V also has a large footprint.
  • a heat exchanger comprising a tube of thermally good conducting material wound helically to form a coil, in which a so-called "secondary” fluid is intended to circulate, this coil being held between two cylindrical, coaxial, so-called “internal” rings “and” outer “, assembled together at each of their two ends, said coil having a flattened cross section, whose major axis is substantially perpendicular to the axis of the helix, each turn of the coil having radial faces which are spaced from the radial faces of the adjacent turn of a gap of constant width, a so-called “primary” fluid being intended to circulate between each turn of said coil, against the flow of said secondary fluid flow.
  • Such a device is of a large size and is also poorly adapted to withstand the overpressures likely to appear in the fluid circulation circuit.
  • the present invention aims to solve the aforementioned drawbacks of the state of the art.
  • It aims in particular to provide a heat exchanger with a large exchange surface, and a hot water production device instantly ensuring a large flow of hot water.
  • Another object of the invention is to integrate within the enclosure of the hot water production device a three-way valve system of very simple structure, so as to significantly reduce the overall cost of production. this device, and to significantly reduce the overall size.
  • Another objective of the invention is to provide a device with a high resistance to the sanitary pressure which can sometimes reach 25 bars (25.10 5 Pa), these pressure peaks may be the result of "water hammer” or pressure valves. defective security, for example.
  • the invention relates to a heat exchanger comprising a tube of thermally good conductive material, helically wound to form a coil, wherein a fluid, called “secondary”, is intended to circulate, this coil being maintained between two cylindrical, coaxial, so-called “internal” and “external” ferrules, assembled together at each of their two ends, said coil having a flattened and substantially oval cross-section, whose major axis is substantially perpendicular to the axis of the helix each coil coil having radial faces which are spaced apart from the radial faces of the adjacent turn of a gap of constant width, a so-called “primary” fluid being intended to circulate between each turn of said coil, against the current of the circulation said secondary fluid.
  • a fluid called “secondary”
  • This exchanger is remarkable in that the gap between two adjacent coils of the coil is calibrated by means of at least one helical protruding element, as well as the coil and arranged between the radial faces facing each other of the turns, and in that the inner ferrule and the outer ferrule are assembled together at each of their two ends by a helical flange whose space between the ends of the coil allows the passage of said primary fluid and its circulation between the turns of said coil of part and of another of said projecting element, between said ferrules.
  • the invention also relates to a domestic hot water production device which is characterized in that it comprises an enclosure inside which is installed the aforementioned heat exchanger, the sanitary water to be heated constituting the fluid secondary coil circulating inside the coil, each end of this coil passing through the wall of said enclosure at a mouth formed for this purpose, the inlet and the outlet of the primary fluid inside the enclosure is making respectively an inlet port and an outlet port.
  • the invention also concerns a mixed domestic hot water distribution installation comprising a primary central heating circuit and a secondary sanitary drawing circuit, this installation being equipped with a hot water production device such as the one mentioned above. above, connected in parallel to the radiators of the central heating circuit, the central heating water, supplied by a boiler, constituting said primary fluid and the sanitary draw water constituting said secondary fluid.
  • the heat exchanger 6 will now be described with reference more specifically to the figures 3 , 4 and 5 .
  • It consists of a tube 69 of flattened cross section and substantially oval, helically wound so as to form a coil, so that the major axis of its cross section is substantially perpendicular to the axis X-X ' of the helix.
  • the secondary fluid circulates inside this tube 69 and the primary fluid around it and against the current.
  • This tube 69 is made of a thermally good conductive material, preferably metal, for example stainless steel. It consists of a number of turns 62, whose large faces called “radial faces" referenced 620, 621 are spaced from the faces 621, 620 of the adjacent turn 62, a gap of constant width L.
  • each spiral turn 62 is respectively referenced 624 for the inner side and 625 for the outer side of the coil 69.
  • the rectilinear end portions 63, 63 'of this tube extend tangentially outwardly of the helix and terminate in cylindrical ends forming respectively the inlet mouths 60 and the outlet mouth 61 of the secondary fluid circulating therein. .
  • the transition between the flattened portions 63, 63 'and the cylindrical ends 61, 60 is progressively.
  • the gap L between two adjacent turns 62 of the coil 69 is calibrated by means of a projecting element.
  • this projecting element is a round, rigid helical wire 64, likewise not the coil 69 and mounted so that each of its turns 640 is interposed between two adjacent turns 62 of the coil 69.
  • the wire 64 is made of any type of rigid material, for example plastic or metal such as steel.
  • the helical wire 64 is interposed between the turns of the coil 69 by screwing.
  • the tube or coil 69 and the rigid wire 64 wound helically, are held assembled between two cylindrical coaxial shells, called “internal” and “external” and referenced respectively 65 and 66.
  • each inner and outer shroud 65 and 65 is made from a flat, thin plate wound on itself to form a cylinder of axis of revolution X-X ' .
  • This split structure provides some elasticity to the ferrules 65, 66 which behave like springs, the inner ferrule 65 having a natural tendency to deviate and the outer ferrule 66 to close on itself.
  • the outer ferrule 66 is opened slightly while the inner ferrule 65 is wound tighter on itself. After assembly, the two rings 65 and 66 are released and their own elasticity brings them back to their original position represented on the figure 6 .
  • the two longitudinal ends 650, 660 respectively of each sheet overlap along a generatrix of the cylinder and have a recess located outside the outer shell 66 (respectively inside the inner shell 65) to maintain a constant spacing e between the two ferrules.
  • the inner ferrule 65 and the outer ferrule 66 take up the tensile forces of the wire 64 and the coil 69 with two flanges or crowns.
  • each flange 67, 67 ' has a helical general shape at a turn, so that the two ends 674, 675, (respectively 674', 675 ') of the turn are not in the same plane and are slightly offset 1 relative to each other of a space 676, respectively 676 '.
  • the shape of the ends of the rings 65, 66 is adapted accordingly, see figure 3 that is to say, it has a small recess 650, respectively 660.
  • the flange 67 has in cross section the shape of a "U" at right angles whose straight central portion 670 is pressed against the radial face 621 of the last turn 62 of the winding 69 and whose two wings 672 are welded respectively to the outer surface of the inner ferrule 65 and to the inner surface of the outer ferrule 66.
  • the flange 67 ' located on the right on the figure 5 , has a similar structure.
  • the primary fluid enters the heat exchanger 6 tangential to the coil 69, at the space 676, between the first and second turns of the coil 69, flows on either side of the wire 64 and between the ferrules 65. , 66 and spring at the space 676 ', (arrow K , figure 22 ).
  • a circular bottom 68 seals the end of the inner shell 65 located in the vicinity of the inlet mouth 60 of the coil 69.
  • this bottom 68 is concave and its concavity is oriented towards the inside of the shell 65 so as to define a chamber 680.
  • the projecting element calibrating the gap L consists of two protrusions 623, 623 'semi-cylindrical, the projection 623 being stamped in the radial face 621 of the turn 62 and the projection 623' being stamped in the opposite radial face 620 .
  • Each projection 623 of the radial face 621 comes into contact with the projection 623 'of the radial face 620.
  • the projecting element calibrating the gap L consists of two pairs of semi-cylindrical projections 628, 629 and 628 ', 629', the pair of projections 628, 629 being stamped in the radial face 621 of the turn 62 and the pair of projections 628 ', 629' being embossed in the opposite radial face 620.
  • Each projection 628 of the radial face 621 comes to contact of the projection 628 'of the radial face 620 and likewise for the projections 629 and 629'.
  • This variant embodiment is particularly suitable in the case where the radial faces 620, 621 of the coil are a large width LA and / or when there is a high fluid pressure in the coil.
  • the two points of contact between two neighboring turns prevent deformation of the coil.
  • the primary fluid flows on the one hand into the space between the inner ring 65 and the projections 628, 628 'and on the other hand in the space between the outer ring 66 and the projections 629. , 629 'next to each other.
  • the projecting element is pressed only on one of the radial faces (here the face 621) of the turns 62 and comes into contact with the radial face 620 of the adjacent turn 62 located opposite.
  • This salient element has the reference 622.
  • Each solder 626 and 627 has the shape of a helical band extending along the corresponding ferrule.
  • the brazing can be carried out by introducing copper powder on the two walls facing inner and outer shrouds 65 65 and then placing the coil 69 and placing the assembly in a vacuum oven.
  • connection between the coil 69 and the two inner and outer rings 65 and 65 increases the exchange surface which is in contact with the primary fluid and the secondary fluid and thus substantially increases the overall efficiency of the exchanger while also improving its resistance. at high health pressures.
  • the rings 65 and 66 behave as a finned surface integral with the coil 69.
  • solders 626 and 627 in the variant where the projecting element calibrating the gap L between two turns 62 is the wire 64. In this case, however, the latter must be made of metal to support the passage vacuum oven.
  • the invention also relates to a device 4 for producing domestic hot water water comprising an enclosure 5 inside which is installed the heat exchanger 6 which has just been described, the domestic water to be heated constituting the secondary fluid circulating inside the coil 69 of this exchanger.
  • the enclosure 5 has the general shape of a cylinder whose axis of revolution coincides with the axis X-X ' and whose two rounded ends 53, 54 are portions of the sphere.
  • upstream end The end 53 of the enclosure through which the primary fluid is introduced is called “upstream end” and its opposite end 54, “downstream end”.
  • This enclosure 5 is made of composite material, such as a plastic material loaded for example with fibers or glass flakes, so as to give it low mechanical strength and thermal insulation properties.
  • the heat exchanger 6 previously described is placed inside the lower half-shell 51 provided with two mouths 510, 511 suitable for receiving respectively the cylindrical ends 60 and 61 of the coil 69, (see FIG. figure 7 ).
  • tips 60 and 61 are respectively crimped on these mouthpieces 510 and 511, an O-ring 601, respectively 611, sealing between the stainless steel coil 69 and the plastic material of the enclosure 5.
  • the upper half-shell 52 is then assembled to form the enclosure 5.
  • Sealing is ensured by the hot melting of the edges of the two half-shells 51 and 52, and then by pressure or ultrasonic assembly using a suitable equipment known per se.
  • the plane along which the two half-shells 51 and 52 are welded is represented by the line Y-Y ' .
  • the X-X ' axis is located in this plane.
  • the outer shell 66 is positioned inside the enclosure 5 by an annular spacer 500 advantageously made of foam.
  • This spacer 500 makes it possible to prevent a flow of parasitic water between the outer shell 66 and the wall of the enclosure 5
  • the wall 520 of the upper half-shell 52 has a recess 521 extending along the upper generatrix of the cylinder constituting the enclosure 5, parallel to the axis X-X ' .
  • An element 55 of composite material cooperates with this recess 521 to define a channel 50 whose role will be detailed later.
  • This element has the shape of an elongated slightly curved lamella and extends in the cylindrical portion of the enclosure 5, between the upstream end 53 at the downstream end 54 (see FIG. figures 3 and 4 ).
  • this element 55 acting as an intermediate partition is curved so as to lie in the extension of the curvature of the hemi-cylindrical half-shell 52.
  • This partition 55 is welded or glued to the wall 520.
  • the three channels of the pipe 2 are constituted by a mouth 23, called “upstream, formed in the wall of the upper half-shell 52, by a mouth 24, called” downstream “, formed in the wall of the half-shell lower 51 and through an orifice 20 pierced in a vertical intermediate partition 220, each semi-circular half of which is integral with the corresponding half-shell 51 or 52.
  • This three-way pipe 2 is formed in the upstream end 55 of the enclosure 5.
  • the two mouths 23 and 24 are coaxial axis Z-Z ' perpendicular to the plane YY' and intersecting the axis X-X ' .
  • the circular inlet 20 is provided with a filter 25 preventing the passage inside the chamber 5 of suspended particles (in particular limestone), present inside the primary water circuit.
  • the inlet orifice 20 extends inside the enclosure 5 by a tube 26 for introducing the primary fluid, of cylindrical shape and coaxial with the axis X-X ' of the inner shell 65.
  • This tube 26 extends from the inlet opening 20 to a short distance from the concave bottom 68, so that the flow of primary liquid entering inside this tube is deflected by the bottom 68 and brought back into position. direction of the upstream end 53 of the enclosure (see arrow J ).
  • the pipe 10 is fitted and then held in the upstream mouth 23 with a not shown clip, the seal being provided by a seal 101, the pipe 11 is fitted and then held likewise in the mouth 24, sealing being provided by a seal 110.
  • the pipes 10 and 11 could also be made integral with these upstream mouths 23 and downstream 24 by any other appropriate means ensuring the seal, (threaded connection etc .).
  • the three-way manifold 2 is further provided with a baffle lip 27 extending inwardly toward the orifice 20 locally reducing the inside diameter of said conduit. Its function is to direct the jet of primary fluid against the surface of the filter 25, so as to eliminate in heating mode radiators any impurities that would accumulate during the sanitary heating mode.
  • the three-way valve 7 will now be described with reference to figures 4 , 5 , 8 , 9 , 10 and 11 .
  • a complementary piece 700 made of plastic, the shape of which appears better on the figure 10 is introduced inside the downstream end 54 of the upper half-shell 52. It has an orifice 70 and an orifice 720 defining the seats of a valve 75.
  • the orifice 70 is the orifice through which the fluid primary comes out of the enclosure 5.
  • This complementary piece 700 is arranged so that the orifice 70 extends in a vertical plane and the orifice 720 is located in the extension of a conduit 72, integrally molded with the lower half-shell 51 and extending therein along a longitudinal axis T-T ' perpendicular to the Y-Y' plane and intersecting the X-X ' axis.
  • the conduit 72 opens out of the enclosure 5 at an upstream mouth 73 inside which is fitted and then crimped the pipe 12, the seal being provided by a seal 120.
  • the pipe 13 is fitted and then crimped into a downstream mouth 74 of axis T-T ' , the seal being provided by a seal 130.
  • This mouth 74 is integral with the upper half-shell 52.
  • the channel 50 opens out in the vicinity of the mouth 74 via an orifice 550.
  • the three channels of the valve 7 are therefore constituted by the outlet orifice 70, by a channel opening into the downstream mouth 74 and by a channel opening into the upstream mouth 73.
  • a disc valve 75 is mounted eccentrically on a rotary shaft 76 whose axis SS 'is tangent to the valve at a point A.
  • the S-S ' axis is parallel to the Y-Y' plane and perpendicular to the X-X ' axis.
  • the shaft 76 is rotated about the axis SS 'by a motor 77 placed outside the enclosure 5, a rotary joint 78 being formed in the wall of the enclosure 5 for the passage of this shaft .
  • the opposite end of the shaft 76 rests in a bearing 760 formed in the complementary part 700.
  • the valve 75 carries a superior disc-shaped elastic lining 750, able to bear against the edge of the outlet orifice 70, so as to close the latter in a completely sealed manner, the position shown in dashed lines in FIG. figure 4 ) and a lower discoidal resilient lining 751 able to sealingly close the orifice 720, when the shaft 76 is in the position shown in FIGS. figures 4 , 8 , 9 and 11 .
  • the flow rate of the water circulating in the heating circuit is then zero or very low.
  • the main exchanger of the boiler is poorly irrigated with water, which can cause overheating and boiling starts, harmful to its operation and its life.
  • Such a valve equipped with a calibrated spring allows the passage of a minimum flow of sufficient primary fluid to avoid boiling phenomena, when the flow rate in the installation of the radiators 100 is insufficient or zero.
  • this discharge valve 8 is integrated directly into the enclosure 5 of the hot water production device 4.
  • the valve 8 is mounted on a substantially cylindrical sleeve 56, of axis W-W ' perpendicular to the axis X-X' , integral with the wall of the recess 521.
  • the valve 8 comprises a fixed part 80, having the shape of a substantially hemispherical dome, axis W-W ' , whose opening is directed downwards.
  • the piece 80 is retained inside the sleeve 56 by a ring 83 of the circlip type, the assembly being mounted in a sealed manner, by an elastic annular seal 84, interposed between the elements 80 and 56.
  • the piece 80 rests in a sealed manner on a discoid base 57, integral with the recess 521.
  • This disc base 57 is pierced with a central circular orifice 58.
  • the discoid portion 57 is traversed by a second oblong opening 570 (see FIG. figure 15 ).
  • the valve 8 is provided with a piston 85 comprising a circular base 86, substantially discoidal, and an axial rod 87 of axis W-W ' .
  • the latter is guided in translation, along the axis W-W ' in a tubular sleeve 81 formed in the portion 80 in the form of a dome.
  • a helical compression spring 82 constantly tends to push the piston 85 downwards.
  • the base 86 of the piston carries an annular elastic seal 860, adapted to bear against the edge of the orifice 58, so as to seal it completely leaktight, when the piston 85 is in the lower position under the solicitation of the spring 13, as shown in the Figures 12 and 13 .
  • the value of the stiffness of the spring 82 is chosen according to the overpressure threshold beyond which it is desirable for the piston 85 to rise.
  • the figure 16 is a simplified embodiment of an embodiment in which the chamber 5 is significantly longer than the heat exchanger 6, the length of the tube 26 for introducing the primary fluid being adapted accordingly. This makes it possible to increase the volume of primary hot water present in the vicinity of the heat exchanger 6 and to prevent this primary water from cooling too rapidly when sanitary water is taken and the cold water begins to enter the coil 69.
  • the figure 24 illustrates an alternative embodiment of the device of the figure 16 in which the tube 26 for introducing the primary fluid is not connected to the upstream mouth 23 but is integral with a vertical partition 522, offset towards the heat exchanger 6 and integral with the enclosure 5.
  • This partition 522 defines with the left half of the enclosure 5 (with respect to the figure 24 ), an additional volume of primary water accumulated in reserve.
  • the hot water production device 4 is mounted in the mixed central heating and domestic hot water distribution system as shown in FIG. figure 17 .
  • the operation of the installation is identical to that described in conjunction with the Figures 1 and 2 and the three-way valve 7 makes it possible to select the path of the primary fluid inside the installation.
  • the deflector lip 27 locally increases the speed of this fluid, which makes it possible to eliminate the impurities accumulated on the filter 25, especially when this primary fluid is circulating towards the inside of the fluid. enclosure 5.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Water Supply & Treatment (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Massaging Devices (AREA)

Claims (20)

  1. Wärmetauscher (6) mit einem Rohr (69) aus einem thermisch gut leitendem Material, das wendelförmig aufgewickelt ist, um eine Rohrschlange zu bilden, und in welchem ein Fluid, nämlich ein "Sekundärfluid", zirkulieren soll, wobei diese Rohrschlange (69) zwischen zwei zylindrischen koaxialen Mänteln, nämlich einem "inneren" (65) und einem "äußeren" (66) Mantel gehalten wird, die an jedem ihrer beiden Enden miteinander verbunden sind, wobei die Rohrschlange (69) einen abgeplatteten und im Wesentlichen ovalen Querschnitt aufweist, dessen große Achse im Wesentlichen senkrecht zu der Achse (X-X') der Wendel ist, wobei jede Windung (62) der Rohrschlange (69) radiale Flächen (620,621) aufweist, die von radialen Flächen (621,620) der benachbarten Windung (62) durch einen Zwischenraum (L) konstanter Größe beabstandet sind, wobei zwischen jeder Windung (62) der Rohrschlange (69) ein Fluid, nämlich ein "Primärfluid", gegenläufig zu der Zirkulation des Sekundärfluids zirkulieren soll,
    dadurch gekennzeichnet, dass der Zwischenraum (L) zwischen zwei benachbarten Windungen (62) der Rohrschlange (69) mit Hilfe mindestens eines wendelförmigen vorspringenden Elements (622,623,623',628,628',629,629',64) kalibriert ist, das die gleiche Ganghöhe wie die Rohrschlange (69) aufweist und zwischen den sich gegenüberliegenden radialen Flächen (620,621) der Windungen (62) angeordnet ist, und
    dass der innere Mantel (65) und der äußere Mantel (66) an ihren beiden Enden über einen wendelförmigen Flansch (67,67') miteinander verbunden sind, dessen Zwischenraum (676,676') zwischen den Enden (674,675;674',675') der Windung den Durchgang des Primärfluids und dessen Zirkulation zwischen den Windungen (62) der Rohrschlange (69) beiderseits des vorspringenden Elements (622,623,623',628,628',629,629,64) zwischen den Mänteln (65,66) erlaubt.
  2. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass das vorspringende Element (622) als Ausbauchung in eine der radialen Flächen (621) der Windungen (62) der Rohrschlange (69) geformt ist und in Kontakt mit der gegenüberliegenden radialen Fläche (620) der benachbarten Windung (62) kommt.
  3. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass mindestens ein vorspringendes Element (623,628,629) als Ausbauchung in eine (621) der radialen Flächen der Windungen (62) geformt ist, und dass eine identische Anzahl von vorspringenden Elementen (623',628',629') als Ausbauchung in die andere radiale Fläche (620) der Windung geformt ist, wobei jedes vorspringende Element (623,628,629) der einen (621) der radialen Flächen in Kontakt kommt mit einem anderen vorspringenden Element (623',628',629') der gegenüberliegenden radialen Fläche (620).
  4. Wärmetauscher nach Anspruch 3, dadurch gekennzeichnet, dass ein erstes Paar von halbzylindrischen Vorsprüngen (628,629) als Ausbauchung in eine (621) der radialen Flächen der Windungen (62) geformt ist, und dass ein zweites Paar von halbzylindrischen Vorsprüngen (628',629') als Ausbauchung in die andere radiale Fläche (620) der Windungen geformt ist, wobei jeder Vorsprung (628,629) der einen (621) der radialen Flächen in Kontakt kommt mit einem anderen Vorsprung (628',629') der gegenüberliegenden radialen Fläche (620).
  5. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass das vorspringende Element ein wendelförmiger starrer Draht (64) ist, der so angeordnet ist, dass jede seiner Windungen (640) zwischen zwei benachbarten Windungen (62) der Rohrschlange (69) angeordnet ist.
  6. Wärmetauscher nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die gegenüberliegenden kleinen Seiten (624,625) jeder Windung (62) der Rohrschlange (69) mit dem inneren Mantel (65) und dem äußeren Mantel (66) in dem Bereich ihrer jeweiligen gegenseitigen Kontaktpunkte (626,627) verlötet sind.
  7. Vorrichtung zur häuslichen Erzeugung von warmem Brauchwasser (4), gekennzeichnet durch einen Behälter (5), in dessen Inneren der Wärmetauscher (6) nach einem der Ansprüche 1 bis 6 angeordnet ist, wobei das zu erwärmende Brauchwasser das Sekundärfluid bildet, das im Inneren der Rohrschlange (69) zirkuliert, wobei jedes Ende (60,61) dieser Rohrschlange (69) die Wand des Behälters (5) im Bereich eines zu diesem Zweck ausgesparten Durchlasses (510,511) durchquert, wobei der Einlass und der Auslass des Primärfluids in das Innere des Behälters (5) jeweils über eine Einlassöffnung (20) und eine Auslassöffnung (70) erfolgt.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass im Inneren des Behälters (5) eine Verteilungskammer (680) zum Verteilen des Primärfluids vorgesehen ist, wobei diese Kammer (680) von der Innenwand des inneren zylindrischen Mantels (65) und von einem kreisförmigen Boden (68) begrenzt wird, der das in Nachbarschaft der Einlassöffnung (60) des Sekundärfluids angeordnete Ende des inneren Mantels (65), d. h. das "Einlassende", abdichtend verschließt, und dass im Inneren des inneren Mantels (65) ein Einleitungsrohr (26) zum Einleiten des Primärfluids angeordnet ist, dessen eines Ende mit der Einlassöffnung (20) des Primärfluids verbunden ist und das gegenüberliegende Ende in einem geringen Abstand zu dem Boden (68) angeordnet ist, so dass letzterer eine Ablenkeinrichtung bildet, die den eintretenden Primärfluidstrom in Richtung auf das gegenüberliegende Ende der Verteilungskammer (680) zurückschickt.
  9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass der Boden (68) konkav ist, wobei seine Konkavität in Richtung auf das Einleitungsrohr (26) des Primärfluids gerichtet ist.
  10. Vorrichtung nach einem der Ansprüche 7 bis 9, gekennzeichnet durch ein mit dem Behälter (5) integrales Dreiwegerohr (2), wobei einer der Wege von der Einlassöffnung (20) des Primärfluids gebildet wird, der andere von einem stromaufwärts gelegenen Durchlass (23) und der dritte von einem stromabwärts gelegenen Durchlass (24), wobei die Einlassöffnung (20) mit einem Filter versehen ist.
  11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass das Dreiwegerohr (2) im Inneren in Nachbarschaft zur Einlassöffnung (20) mit einer Ablenklippe (27) versehen ist, um den eintretenden Primärfluidstrom in Richtung Einlassöffnung (20) zu lenken.
  12. Vorrichtung nach einem der Ansprüche 7 bis 11, gekennzeichnet durch ein mit dem Behälter (5) integrales Dreiwegeventil (7) für die Verteilung des Primärfluids, wobei einer der Wege von einer Auslassöffnung (70) des Primärfluids gebildet ist, der andere Weg zu einem stromabwärts gelegenen Durchlass (74) führt und der dritte zu einem stromaufwärts gelegenen Durchlass (73) führt, wobei diese zwei Durchlässe (73,74) in der Wand des Behälters (5) ausgespart sind, wobei dieses Ventil (7) eine Klappe (75) aufweist, mit der selektiv entweder die Auslassöffnung (70) oder der zu dem stromaufwärts gelegenen Durchlass (73) führende Weg verschließbar ist.
  13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass die Klappe (75) an einer Welle (76) angebracht ist, die von einem Motor (77) in Drehung versetzt wird.
  14. Vorrichtung nach einem der Ansprüche 7 bis 13, dadurch gekennzeichnet, dass im Inneren des Behälters (5) ein Ablasskanal (50) ausgespart ist, um den Einlass (20) und den Auslass (70) des Primärfluids in Fluidverbindung zu bringen, wobei dieser Ablasskanal (50) mit einer Ablassklappe (8) versehen ist.
  15. Vorrichtung nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, dass der Ablasskanal (50) zwischen einer Vertiefung (521) des Behälters (5) und einer zwischen der Vertiefung (521) und dem äußeren Mantel (66) angeordneten Zwischenwand (55) angeordnet ist, wobei sich dieser Ablasskanal (50) von der Nachbarschaft des stromaufwärts gelegenen Endes (53) des Behälters aus bis zu seinem stromabwärts gelegenen Ende (54) erstreckt, wo er in den stromabwärts gelegenen Durchlass (74) des Dreiwegeventils (7) mündet.
  16. Vorrichtung nach Anspruch 14 oder 15, dadurch gekennzeichnet, dass die Ablassklappe (8) einen von einer geeichten Feder (82) gespannten Kolben (85) aufweist, durch den eine in dem Ablasskanal (50) ausgesparte Durchgangsöffnung (58) des Primärfluids verschließbar ist, wenn der Druck des im Inneren des Behälters (5) ankommenden Primärfluids kleiner ist als ein vorgegebener Schwellenwert, und welcher andererseits diesen Durchgang erlaubt, wenn der Druck diesen Wert überschreitet.
  17. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, dass die Ablassklappe (8) in einer Manschette (56) angebracht ist, die mit der Vertiefung (521) des Behälters (5) integral ist und deren Achse (W-W') senkrecht zu der Ebene dieser Vertiefung ist, wobei der Kolben (85) entlang der Achse (W-W') der Manschette (56) translationsbeweglich ist und von einer schraubenförmigen Druckfeder (82) gespannt wird, die an einem kuppelförmigen Stück (80) anliegt, das an der Manschette (56) abdichtend angebracht ist.
  18. Vorrichtung nach den Ansprüchen 14, 15, 16 und 17, dadurch gekennzeichnet, dass die Ablassklappe (8) eine feste transversale Wand (59), die den Raum zwischen der Vertiefung (521) des Behälters (5) und der Zwischenwand (55) trennt, und einen mit dieser festen Wand (59) verbundene Basis (57) aufweist, durch die einerseits die Öffnung (58), die durch den Kolben (85) verschließbar ist, und andererseits eine Öffnung (570), die in dauerhafter Verbindung mit dem Inneren des kuppelförmigen Stücks (80) steht, hindurchgeht.
  19. Vorrichtung nach einem der Ansprüche 7 bis 18, dadurch gekennzeichnet, dass der Behälter (5) aus einem Kunststoffmaterial hergestellt ist.
  20. Kombinierte Anlage zur häuslichen Verteilung von warmem Brauchwasser, mit einem Zentralheizung-Primärkreislauf (I) und einem Brauchwasser-Sekundärkreislauf (II), gekennzeichnet durch eine Vorrichtung zur Erzeugung von warmem Brauchwasser (4) nach einem der Ansprüche 7 bis 19, die parallel zu den Heizkörpern (100) des Zentralheizung-Kreislaufs angeschlossen ist, wobei das von einem Heizkessel (1) bereitgestellte Wasser der Zentralheizung das Primärfluid und das Brauchwasser das Sekundärfluid bildet.
EP03786013A 2002-11-29 2003-11-18 Wärmetauscher und brauchwassererhitzer Expired - Lifetime EP1565690B1 (de)

Applications Claiming Priority (3)

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FR0215005 2002-11-29
FR0215005A FR2847972B1 (fr) 2002-11-29 2002-11-29 Echangeur de chaleur et dispositif de production d'eau chaude sanitaire
PCT/FR2003/003407 WO2004051147A1 (fr) 2002-11-29 2003-11-18 Echangeur de chaleur et dispositif de production d'eau chaude sanitaire

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CN105928392A (zh) * 2016-06-14 2016-09-07 西安交通大学 一种螺旋垫条型缠绕管式换热器

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DE102006004900A1 (de) * 2006-02-03 2007-08-16 Viessmann Werke Gmbh & Co Kg Heizgerät
FR2928442B1 (fr) 2008-03-06 2010-12-17 Mer Joseph Le Installation de production d'eau chaude sanitaire
JP5729910B2 (ja) * 2010-03-05 2015-06-03 三菱重工業株式会社 温水ヒートポンプおよびその制御方法
IT201600074665A1 (it) 2016-07-18 2018-01-18 Ariston Thermo Spa Scambiatore di calore per caldaia o simili

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FR2304884A1 (fr) * 1975-03-17 1976-10-15 Sepro Echangeur de chaleur a circulation de fluides
FR2337314A2 (fr) * 1975-12-31 1977-07-29 Marco Jean Echangeur thermique pour la production continue d'eau chaude
NL194651C (nl) * 1988-07-27 2002-10-04 Meppeler Machf Nv Tapwater-verwarmingsinrichting.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105928392A (zh) * 2016-06-14 2016-09-07 西安交通大学 一种螺旋垫条型缠绕管式换热器

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EP1565690A1 (de) 2005-08-24
DE60336257D1 (de) 2011-04-14
ATE500472T1 (de) 2011-03-15

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