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 domestic hot water production device, equipped with such an exchanger.
• a first solution consists in producing domestic hot water using a tank whose volume can vary from a few tens to a few hundred liters.
• the reserve of water accumulated in this tank is heated by an electrical resistance or by a coil crossed by the fluid of the primary circuit of a heat exchanger of a boiler or fuel or gas.
• FIGS. 1 and 2 attached to this patent application are diagrams which illustrate a domestic installation in accordance with 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 each other at the level of a device D for producing hot water.
• the latter comprises a small-volume balloon B containing a coil S, of circular section, at the level of which heat exchange takes place.
• the primary circuit I comprises a heating source 1 for the water in this circuit; it is for example a boiler provided with a gas burner.
• a suitable pump 15 circulates water in this circuit I.
• the water leaves the boiler 1 via a line 10, then passes via a connector R in the shape of a "T" in a line 11, passes through the central heating radiators 100, and returns to the boiler 1 after having dissipated part of its calories in the radiators 100.
• the return pipe comprises two pipes 12, 13 separated by a three-way valve V; line 13 is connected to boiler 1 after passing through pump 15 via line 14.
• the water from the central heating constitutes the primary fluid;
• the hot water production device D is connected in parallel with respect to the radiators 100, the bypass being located upstream of these radiators by the connection R at "T" and, downstream, by the three-way valve N.
• the reference EF has designated a source for producing cold water; it may for example be a tap connected to the drinking water network provided in the house receiving this installation.
• the reference EC has designated a device for using hot water; it is for example a tap or a shower head intended to supply hot water to the user.
• the three-way valve N is in a position such that the pipes 12 and 13 are placed in communication, the pipe 17 being on the other hand isolated. In this situation, the water supplied by the boiler 1 travels exclusively through the primary circuit I, as symbolized by the arrows F, ensuring the heating of the radiators 100.
• FIG. 2 illustrates the situation in which a drawing of sanitary water is requested, for example by the opening of a tap provided in the device for use EC.
• the hot water which circulates according to the arrow G in the primary circuit I is routed at the level of the “T” connection R to the device for producing hot water D.
• Hot water does not pass through the radiators 100 since the outlet of the pipe 12 is closed, but exclusively inside the tank B and returns to the boiler 1, via the pipes 13 and 14 and the pump 15.
• water from the secondary circuit II traverses the coil S of the input c to the output, as symbolized by the arrows H, that is to say against -current of the primary circuit water circulating in the tank B.
• the heat exchange takes place between the hot water of the primary circuit present inside the tank B and the cold water penetrating inside the coil S; hot water therefore reaches the EC user device.
• the water leaves the boiler 1 at a temperature close to 80 ° C and returns there to a temperature between 40 and 60 ° C depending on the setting of the radiators 100.
• the cold water into the interior of the coil S is at a temperature of about 15 ° C and hot water obtained inside the EC utilization device is at a temperature around 45 ° C.
• the three-way valve N switches back to its initial position, which makes it possible to supply the radiators 100.
• the instantaneous flow of hot water that can be obtained continuously with such an installation depends on the heat exchange performance of the device D. However, these are not optimal because the coil S is circular cross section. Because of this, it is impossible to obtain hot water from several taps at the same time.
• the coil S tends to scale quickly.
• the axial size of a coil of round section is large, so that the dimensions of the balloon B containing it are also.
• the three-way valve V also has a large size.
• the object of the present invention is to solve the aforementioned drawbacks.
• It aims in particular to provide a heat exchanger having a large exchange surface, as well as a device for producing hot water instantly ensuring a large flow of hot water.
• Another objective of the invention is to integrate inside the enclosure of the device for producing hot water a three-way valve system of very simple structure, so as to significantly reduce the overall cost price of this device, and to significantly reduce the overall size.
• Yet another objective of the invention is to provide a device having a high resistance to the sanitary pressure which can sometimes reach 25 bars (25.10 5 Pa), these pressure peaks being able in particular to result from "water hammer” or from pressure valves. defective security, for example.
• the invention relates to a heat exchanger comprising a tube of thermally good conductive material, wound in a helix to form a coil, in which a fluid, called “secondary”, is intended to circulate, this tube having a cross section flattened and substantially oval, the major axis of which is substantially perpendicular to the axis of the propeller, each turn of the coil having radial faces which are spaced from the radial faces of the adjacent turn of an interstice of constant width, a fluid called “primary" being intended to circulate between each turn of the coil, against the flow of said secondary fluid.
• a fluid called "secondary”
• This exchanger is remarkable in that the gap between two neighboring turns of the coil is calibrated by means of at least one helical projecting element, in the same way as the coil and disposed between the radial faces opposite the turns, and in that said coil is held between two cylindrical ferrules, coaxial, called “internal” and “external”, assembled together at each of their two ends by a helical flange whose space between the ends of the turn allows the passage of said primary fluid and its circulation between the turns of said coil on either side of said projecting element, between said ferrules.
• At least one projecting element is stamped in one of the radial faces of the turns and an identical number of projecting elements is stamped in the other radial face of the turn, each projecting element of one of the radial faces coming into contact another projecting element of the radial face located opposite;
• a first pair of semi-cylindrical projections is stamped in one of the radial faces of the turns and a second pair of semi-cylindrical projections is stamped in the other radial face of said turns, each projection of one of the radial faces coming from in contact with another projection of the radial face located opposite;
• said protruding element is a rigid helical wire, mounted so that each of its turns is interposed between two neighboring turns of the coil,
• the invention also relates to a domestic apparatus for producing hot water, which is characterized in that it comprises an enclosure inside which is installed the above-mentioned heat exchanger, sanitary water to be heated constituting the fluid secondary which circulates inside the coil, each end of this coil crossing the wall of said enclosure at a mouth provided for this purpose, the inlet and outlet of the primary fluid inside the enclosure making respectively by an inlet and an outlet.
• a primary fluid distribution chamber is provided inside said enclosure, this chamber being delimited by the internal wall of the cylindrical internal ferrule and by a circular bottom sealingly sealing the end of said internal ferrule located in the vicinity of the secondary fluid inlet orifice, called the "inlet end" and a tube for introducing the primary fluid is disposed inside said internal ferrule, one of its ends being connected to the primary fluid inlet orifice and its opposite end opening out a short distance from said bottom, so that the latter forms a deflector which returns the incoming flow of primary fluid towards the opposite end of said distribution chamber;
• the bottom is concave, its concavity being oriented towards the tube for introducing the primary fluid
• the device for producing hot water comprises a three-way manifold integral with said enclosure, one of the channels is constituted by the inlet of the primary fluid and the other by an upstream mouth and the third a downstream mouth, said inlet orifice being provided with a filter;
• the water producing device comprises a hot three-way valve for distributing the primary fluid, integrated with said enclosure, one of the channels is constituted by an outlet of the primary fluid, the other channel opens into a downstream mouth and the third opens into an upstream mouth, these two mouths being formed in the wall of the enclosure, this valve comprising a valve capable of selectively closing either said outlet or the channel opening into the upstream mouth;
• This valve is mounted on a shaft driven in rotation by a motor
• a discharge channel is formed inside the enclosure so as to put the inlet and outlet of primary fluid in communication with fluid, this discharge channel being equipped with a discharge valve;
• the discharge channel is formed between a recess in the enclosure and an intermediate partition disposed between said recess and the outer shell, this discharge channel extending from the vicinity of the upstream end of the enclosure to its downstream end where it opens into the downstream mouth of the three-way valve;
• the discharge valve comprises a piston urged by a calibrated spring, capable of closing a orifice for the passage of the primary fluid formed in said discharge channel when the pressure of said primary fluid arriving inside the enclosure is less than a value predetermined threshold and which, on the contrary, authorizes this passage when the pressure exceeds this value;
• the relief valve is mounted in a sleeve integral with the recess of the enclosure and whose axis is perpendicular to the plane of this recess, the piston being movable in translation along said axis of the sleeve and being biased by a helical compression spring which bears against a dome-shaped part fixed in a sealed manner to said sleeve;
• the relief valve comprises a fixed transverse partition separating the space between said recess of the enclosure and the intermediate partition and a base secured to this fixed partition which is crossed on one side by the orifice capable of being closed by said piston and the other by an opening which communicates permanently with the interior of the dome-shaped part;
• the enclosure is made of plastic
• the invention also relates to a mixed domestic distribution installation comprising a hot water central heating primary circuit and a secondary circuit of sanitary draw-off, this installation being equipped with a hot water device such as that mentioned above, connected in parallel to the radiators of the central heating circuit, the water from the central heating, supplied by a boiler, constituting said primary fluid and the sanitary tap water constituting said secondary fluid.
• FIGS. 1 and 2 are diagrams illustrating the operating principle of a mixed heating installation, equipped with a device for producing instant sanitary hot water, in accordance with the state of the art;
• FIG. 3 is an exploded perspective view of the various component parts of the hot water production device;
• FIG. 4 is a longitudinal vertical sectional view of the hot water production device according to the invention.
• FIG. 5 is a longitudinal sectional view of the same device, taken along the section plane shown by the line N-V in Figure 4;
• FIG. 6 is a schematic view showing the two rings of the heat exchanger in cross section
• FIGS 7, 8 and 9 are views in vertical cross section of the device of Figure 4, according to the sectional planes represented respectively by the lines VII-NII, NIII-NIII and IX-IX of Figure 4, Figure 7 further representing the inlet and outlet mouths of the coil seen in axial section;
• - Figure 10 is a perspective view of one of the parts of the 3-way valve;
• FIG. 11 is a perspective view of the downstream end of the hot water production device
• - Figure 12 is an enlarged sectional view of the relief valve of the device of Figure 4, taken along the section plane shown by line XII-XII in this figure;
• - Figures 13 and 14 are sectional views of the same relief valve in the plane of Figure 4, respectively in the closed and open positions;
• - Figure 15 is a top view partially in section of the device of Figure 4;
• FIG. 16 is a longitudinal vertical sectional view of an alternative embodiment of the hot water production device
• FIG. 17 is a diagram of a domestic installation equipped with the device for producing sanitary hot water according to the invention, this being shown in section;
• FIG. 18 is a longitudinal vertical sectional view of an alternative embodiment of the hot water production device
• FIG. 19 is a longitudinal sectional view of the same device, taken along the section plane represented by the line XIX-XIX in the figure
• FIG. 20 is an end view of the heat exchanger of Figures 18 and 19;
• FIG. 21 is a longitudinal sectional view, partially showing an alternative embodiment of the coil
• FIG. 22 is a perspective view of the downstream end of the hot water production device shown in Figures 18 and 19;
• FIG. 23 is a longitudinal sectional partial view of a variant embodiment of the heat exchanger device shown in Figure 18, the latter being outside the enclosure of the device for producing hot water;
• FIGS. 3, 4 and 5 are longitudinal vertical sectional views of an alternative embodiment of the hot water production device shown in Figure 16; - Figure 25 is a longitudinal, partial sectional view showing another alternative embodiment of the coil.
• the heat exchanger 6 will now be described with more specific reference to FIGS. 3, 4 and 5.
• It consists of a tube 69 of flattened and substantially oval cross section, wound in a helix so as to form a coil, so that the major axis of its cross section is substantially perpendicular to the axis XX '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, the large faces of which are called “radial faces" referenced 620, 621 are spaced from the faces, 621, 620 of the adjacent turn 62, of a gap of constant width L.
• each turn 62 in the form of an arc of a circle are referenced respectively 624 for the interior side and 625 for the exterior side of the coil 69.
• the rectilinear end portions 63, 63 ′ of this tube extend tangentially towards the outside of the propeller and end in cylindrical end pieces constituting respectively the inlet 60 and outlet 61 mouths of the secondary fluid flowing therein. .
• the transition between the flattened parts 63, 63 ′ and the cylindrical ends 61, 60 takes place gradually.
• the gap L between two neighboring turns 62 of the coil 69 is calibrated by means of a projecting element.
• this projecting element is a round, rigid helical wire 64, just like the coil 69 and mounted so that each of its turns 640 is interposed between two neighboring 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 in a helix are kept assembled between two coaxial cylindrical ferrules, called “internal” and “external” and referenced respectively 65 and 66.
• This split structure provides a certain elasticity to the ferrules 65,
• the two longitudinal ends 650, respectively 660 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 thanks to two flanges or crowns.
• each flange 67, 67 ' has a generally helical shape to a turn, so that the two ends 674, 675, (respectively 674', 675 ') of the turn are not in the same plane and are very slightly offset from each other by a space 676, respectively 676 '.
• the shape of the ends of the ferrules 65, 66 is adjusted 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, the rectilinear central part 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 surface outside of the inner shroud 65 and to the inner surface of the outer shroud 66.
• the flange 67 ' located on the right in FIG. 5, has a similar structure.
• the primary fluid enters the heat exchanger 6 tangentially to the coil 69, at the space 676, between the first and second turns of the coil 69, circulates on either side of the wire 64 and between the ferrules 65 , 66 and comes out at the space 676 '(arrow K, figure 22).
• a circular bottom 68 seals the end of the internal ferrule 65 located near the inlet mouth 60 of the coil 69.
• this bottom 68 is concave and its concavity is oriented in the direction of the interior of the ferrule 65 so as to define a chamber 680.
• the projecting element calibrating the gap L consists of two semi-cylindrical projections 623, 623 ′, 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 coil 62 and the pair of projections 628 ', 629' being stamped 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 alternative embodiment is particularly suitable for the case where the radial faces 620, 621 of the coil are one large width LA and / or when there is a high fluid pressure in the se ⁇ entin.
• the two points of contact between two neighboring turns prevent deformation of the se ⁇ entin.
• the primary fluid circulates on the one hand in the space provided between the inner shell 65 and the projections 628, 628 'and on the other hand in the space provided between the outer shell 66 and the projections 629 , 629 'facing each other.
• the projecting element is stamped 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 neighboring turn 62 located opposite .
• This projecting element has the reference 622.
• the projecting elements 622, 623, 623 ', 628, 628', 629 and 629 * which have just been described can be obtained by hydroforming.
• the short inner 624 and outer 625 sides of each turn 62 of the se ⁇ entin 69 are brazed at their point of contact with the two inner 65 and outer ferrules respectively.
• the solders bear the respective references 626 and 627.
• Each solders 626 and 627 has the shape of a helical strip extending along the corresponding ferrule.
• the brazing can be carried out by introducing copper powder on the two walls facing the inner 65 and outer 66 ferrules, then placing the se 69entin 69 there and placing the assembly in a vacuum oven.
• the connection between the se ⁇ entin 69 and the two inner 65 and outer 66 ferrules increases the exchange surface which is in contact with the primary fluid and the secondary fluid and thus significantly increases the overall efficiency of the exchanger while also improving its resistance. with strong health pressures.
• the ferrules 65 and 66 behave like a finned surface integral with the se ⁇ entin 69. It will be noted that although this is not shown in FIG. 4, it would also be possible to produce the solderings 626 and 627 in the variant where the projecting element calibrating the gap L between two turns 62 is the wire 64. In this however, the latter must be made of metal to support passage through the vacuum oven.
• the invention also relates to a device 4 for producing domestic hot water for domestic use 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 which circulates inside the se ⁇ entin 69 of this exchanger.
• the enclosure 5 has the general shape of a cylinder whose axis of revolution coincides with the axis XX 'and whose two rounded ends 53, 54 are portions of a sphere.
• 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 flaking glass, so as to give it properties of mechanical resistance and thermal insulation at low cost. It consists of two lower half shells 51 and upper
• 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 se ⁇ entin 69, (see FIG. 7).
• end pieces 60 and 61 are crimped respectively on these mouths 510 and 511, an O-ring 601, respectively 611, ensuring the seal between the stainless steel of the se ⁇ entin 69 and the plastic of the enclosure 5.
• the upper half-shell 52 is then assembled to constitute the enclosure 5.
• the seal is ensured by hot melting the edges of the two half-shells 51 and 52, then by assembly under pressure or by ultrasound using 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 axis XX ' 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 parasitic water circulation between the outer shell 66 and the wall of the enclosure 5 Referring again to FIG. 7, it can be seen that the wall
• the 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 XX '.
• 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 strip and extends in the cylindrical part of the enclosure 5, between the upstream end 53 to the downstream end 54, (see FIGS. 3 and 4).
• this element 55 playing the role of intermediate partition is curved so as to be located in the extension of the curvature of the semi-cylindrical half-shell 52.
• This partition 55 is welded or glued to the wall 520.
• a plurality of hydraulic components necessary for operation and / or for connecting the hot water production device 4 to the rest of the system are integrated into the enclosure 5, namely a three-way manifold 2, a three-way valve 7, as well as a relief valve 8.
• the three channels of the tube 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 lower half-shell 51 and by an orifice 20 pierced in a vertical intermediate partition 220, each semi-circular half of which is made in one piece 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 with axis Z-Z 'pe ⁇ endicular to the plane Y-Y' and intersecting the axis X-X '.
• the circular inlet orifice 20 is provided with a filter 25 preventing passage inside the enclosure 5, of particles in suspension (in particular of limestone), present inside the primary water circuit.
• the inlet orifice 20 is extended inside the enclosure 5 by a tube 26 for introducing the primary fluid, of cylindrical shape and coaxial with the axis XX 'of the inner shell 65.
• This tube 26 extends from the inlet opening 20 to a small 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 in 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 using a clip not shown, the seal being provided by a seal 101, the pipe 11 is fitted and then similarly held in the mouth 24, l sealing being ensured by a seal 110.
• the lines 10 and 11 could also be made integral with these upstream 23 and downstream 24 mouths by any other suitable means ensuring sealing (threaded connection, etc.).
• the three-way tubing 2 is further provided with a deflecting lip
• An additional piece 700 of plastic material 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 d a valve 75.
• the orifice 70 is the orifice through which the primary fluid leaves the enclosure 5.
• This complementary part 700 is arranged so that the orifice
• conduit 72 integrally molded with the lower half shell 51 and extending to the interior thereof along an axis longitudinal TT 'pe ⁇ endicular to the plane YY' and intersecting the axis X-X '.
• the pipe 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.
• Line 13 is fitted and then crimped into a downstream mouth 74 of axis T-T ', the seal being ensured by a seal 130.
• This mouth 74 is made in one piece with the upper half-shell 52.
• the channel 50 opens in the vicinity of the mouth 74 through an orifice 550.
• the three ways of the valve 7 are therefore constituted by the outlet orifice 70, by a way opening into the downstream mouth 74 and by a way opening into the upstream mouth 73.
• a discoid valve 75 is mounted eccentrically on a rotary shaft 76 whose axis S-S 'is tangent to this valve at a point A.
• the axis S-S ' is parallel to the plane Y-Y' and pe ⁇ endicular to the axis X-X '.
• the shaft 76 is driven in rotation 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 an upper discoid elastic gasket 750, capable of coming to bear against the edge of the outlet orifice 70, so as to close it completely tightly, position shown in dotted lines in FIG. 4) and an elastic gasket lower discoid 751 capable of sealingly closing the orifice 720, when the shaft 76 is in the position shown in FIGS. 4, 8, 9 and 11.
• the relief valve 8 and its role will now be described in more detail with reference to FIGS. 4 and 12 to 14. It may happen at certain times during the operation of the device that all the valves supplying the radiators are partially or entirely closed, in particular when fitted with thermostatic valves.
• the water flow circulating in the heating circuit is zero or very low.
• the main exchanger of the boiler is poorly irrigated with water, which can cause overheating and the start of boiling, which is detrimental to its operation and its service life.
• this relief valve 8 is integrated directly into the enclosure 5 of the device for producing hot water 4.
• the valve 8 is mounted on a substantially cylindrical sleeve 56, of axis W-W pe ⁇ endicular to axis XX-X ', integrally formed with the wall of the recess 521.
• the valve 8 comprises a fixed part 80, having the shape of a substantially hemispherical dome, of axis W-W, the opening of which is directed downwards.
• the part 80 is retained within the sleeve 56 by a ring 83, of the circlip type, the assembly being sealingly mounted by a resilient annular seal 84 interposed between the elements 80 and 56.
• the part 80 rests in a sealed manner on a discoid base 57, integrally formed with the recess 521.
• This discoid base 57 is pierced with a central circular orifice 58.
• a vertical partition 59 As is better seen in FIG. 13, near the orifice 58 is provided a vertical partition 59. It is substantially tangent to the opening 58. On the other side of the vertical partition 59, relative to the orifice 58, the discoid part 57 is crossed by a second oblong opening 570 (see FIG. 15).
• the valve 8 is provided with a piston 85 comprising a circular base 86, substantially discoid, 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 part 80 in the form of a dome.
• a helical compression spring 82 constantly tends to push the piston 85 down.
• the base 86 of the piston carries an annular elastic lining 860, capable of coming to bear against the edge of the orifice 58, so as to close it completely tightly, when the piston 85 is in the low position under stress. of the spring 13, as shown in FIGS. 12 and 13.
• the value of the stiffness of the spring 82 is chosen as a function of the su seuilression threshold beyond which it is desirable for the piston 85 to be raised.
• FIG. 16 shows in a simplified manner an alternative embodiment in which the enclosure 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 quickly when domestic water is taken and the cold water begins to enter the se ⁇ entin 69.
• FIG. 24 illustrates an alternative embodiment of the device of FIG. 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 in the direction of the heat exchanger 6 and integral with the enclosure 5.
• This partition 522 defines with the left half of the enclosure 5 (relative to FIG. 24), a volume of additional primary water accumulated in reserve.
• the hot water production device 4 is mounted in the mixed installation of central heating and domestic hot water distribution as shown in FIG. 17.
• the operation of the installation is identical to that which has been described in conjunction with FIGS. 1 and 2 and the three-way valve 7 makes it possible to select the path of the primary fluid inside the installation.
• the deflecting lip 27 locally increases the speed of this fluid which makes it possible to eliminate the impurities accumulated on the filter 25, in particular when this primary fluid circulates towards the interior of the pregnant 5.

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• 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)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

Country Status (6)

Families Citing this family (5)

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• 2002
  • 2002-11-29 FR FR0215005A patent/FR2847972B1/fr not_active Expired - Fee Related
• 2003
  • 2003-11-18 AU AU2003295021A patent/AU2003295021A1/en not_active Abandoned
  • 2003-11-18 WO PCT/FR2003/003407 patent/WO2004051147A1/fr not_active Application Discontinuation
  • 2003-11-18 EP EP03786013A patent/EP1565690B1/de not_active Expired - Lifetime
  • 2003-11-18 AT AT03786013T patent/ATE500472T1/de not_active IP Right Cessation
  • 2003-11-18 DE DE60336257T patent/DE60336257D1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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