EP1134498B1 - Cheminée fermée, en particulier pour chauffage de bâtiments et d'eau sanitaire - Google Patents

Cheminée fermée, en particulier pour chauffage de bâtiments et d'eau sanitaire Download PDF

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Publication number
EP1134498B1
EP1134498B1 EP01105356A EP01105356A EP1134498B1 EP 1134498 B1 EP1134498 B1 EP 1134498B1 EP 01105356 A EP01105356 A EP 01105356A EP 01105356 A EP01105356 A EP 01105356A EP 1134498 B1 EP1134498 B1 EP 1134498B1
Authority
EP
European Patent Office
Prior art keywords
labyrinth
fireplace unit
ducts
enclosed fireplace
enclosed
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
EP01105356A
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German (de)
English (en)
Other versions
EP1134498A2 (fr
EP1134498A3 (fr
Inventor
Domenico Piazzetta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gruppo Piazzetta SpA
Original Assignee
Gruppo Piazzetta SpA
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Publication date
Application filed by Gruppo Piazzetta SpA filed Critical Gruppo Piazzetta SpA
Publication of EP1134498A2 publication Critical patent/EP1134498A2/fr
Publication of EP1134498A3 publication Critical patent/EP1134498A3/fr
Application granted granted Critical
Publication of EP1134498B1 publication Critical patent/EP1134498B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00—Stoves or ranges
    • F24B1/18—Stoves with open fires, e.g. fireplaces
    • F24B1/183—Stoves with open fires, e.g. fireplaces with additional provisions for heating water

Definitions

  • the present invention relates to an enclosed fireplace unit, particularly for heating buildings and sanitary water.
  • a fireplace comprises a masonry structure which is usually arranged against the wall in one of the rooms of the building.
  • This masonry structure is substantially constituted by a hearth, usually made of bricks, stone, cast iron or other suitable refractory material, which is more or less raised from the ground; a flame is fed on this hearth, for example by burning wood.
  • a hood being directly connected to a flue which leads out onto the roof of the building, so as to collect and expel outside the fumes generated by combustion.
  • fireplaces are generally used to cook or heat food, helping to heat the room almost exclusively through heat exchange by radiation.
  • Enclosed fireplace units of a known type which internally comprise one or more paths for cold water arriving from the water mains or from the heating system of the building, are currently becoming commercially widespread.
  • cold water circulates inside pipes or interspaces located proximate to the flame center or inside the hood, so that the water is heated by the heat generated by the flame center or by the hot fumes that flow through the hood.
  • the hot water thus produced is then conveniently used as sanitary water and optionally also sent to the heating system for circulation within radiators, radiating panels or other radiating elements of a known type which are adapted for exchanging heat with the rooms of the building.
  • Ash, soot and whatever is raised by the flow of hot air that surrounds the flame center and is not light enough to exit toward the flue are in fact deposited, during use, on the outer walls of the pipes and interspaces, which are an integral part of the path of the fumes.
  • Some conventional enclosed fireplace units only partially solve this drawback by having systems for disassembling parts of the hood which are highly elaborate in their structure and require a considerable labour and time to perform, further allowing to achieve only partial cleaning.
  • This humid surface in contact with the fumes, facilitates the deposition of ash and soot, considerably worsening the cleanliness of said fireplace.
  • US patent 4,334,518 discloses a fireplace having two heat exchangers, one of which is located in the exhaust path and is adapted for ease of cleaning.
  • the preamble of claim 1 being derived from US-A-4 334 518.
  • the aim of the present invention is to solve the above-described problems, by providing an enclosed fireplace unit which allows to achieve accurate and simple cleaning of every part thereof, particularly of the hood.
  • the reference numeral 1 designates an enclosed fireplace unit which is constituted by a supporting frame 2 for a hearth 3, on the perimeter whereof side walls protrude upwardly.
  • a first vertical wall 4 is arranged in a rear position and is laterally connected to a second vertical wall and a third vertical wall, designated by the reference numerals 5a and 5b respectively, which are conveniently oblique and are connected to a fourth vertical wall and to a fifth vertical wall, designated by the reference numerals 6a and 6b, which are advantageously parallel to each other and are arranged on planes which being perpendicular to said first vertical wall 4.
  • a door designated by the reference numeral 7, which lies parallel to said first vertical wall 4 and can be opened so as to allow access to a firebox 8.
  • the first, second and third vertical walls 4, 5a and 5b are constituted by a first labyrinth-like element, designated by the reference numeral 9, inside which there is provided a path for a stream of water that arrives from a pair of intake ducts 10a and 10b which are advantageously arranged below said hearth 3.
  • the first labyrinth-like element 9 is conveniently constituted by a plurality of first ducts, generally designated by the reference numeral 11, which are arranged horizontally, are vertically packed together and are mutually connected by a plurality of bends so as to allow flow through them in succession one after the other, so as to increase heat exchange by convection between the water and the internal surface, designated by the reference numeral 12, of said first, second and third walls 4, 5a and 5b.
  • Each one of the hollow plates 15 is constituted by two rectangular elements, designated by the reference numerals 16a and 16b, which are conveniently symmetrical and have curved edges and chamfered corners; on the flat surfaces 17a and 17b of the elements there are advantageously four recesses, designated by the reference numerals 18a and 18b respectively, which are advantageously circular.
  • each one of the four recesses 18a of the rectangular element 16a in fact makes contact, during the assembly of the hollow plate 15, with the respective recess 18b formed in the rectangular element 16b.
  • each other the respective recesses 18a and 18b rigidly couple to each other the respective recesses 18a and 18b, for example by way of conventional methods such as bolting or welding, thus assembling each one of the hollow plates 15, which advantageously can have a gasket at the regions of contact between said pair of rectangular elements 16a and 16b.
  • the recesses 18a and 18b form, inside said hollow plate 15, when assembled, regions of interference for the water stream that arrives from the respective second duct 14, thus increasing the turbulence of the water and thereby effectively increasing heat exchange.
  • the hollow plates 15 are advantageously accommodated inside a hood, designated by the reference numeral 19, which is arranged above said firebox 8 and is suitable to convey the fumes produced during combustion toward a flue, which is not shown in the figures.
  • the hollow plates 15 are connected in an upward region, by means of respective third ducts which are designated by the reference numeral 20 and protrude horizontally in a rearward direction, to a second labyrinth-like element 21, which is advantageously L-shaped so as to protrude above the hollow plates 15.
  • the second labyrinth-like element 21 is preferably constituted by a plurality of fourth ducts, generally designated by the reference numeral 22, which are also arranged horizontally, are packed together side by side and are mutually connected by a plurality of bends so as to allow flow through them in succession one after the other, thus further increasing heat exchange between the water and the second labyrinth-like element 21.
  • said second labyrinth-like element 21 in fact receives from said firebox heat by radiation and by means of the flow of the fumes that exit through the hood 19.
  • the water that circulates in the second labyrinth-like element 21, having heated up in passing from said pair of intake ducts 10a and 10b to the top of the enclosed fireplace unit 1, can exit from said enclosed fireplace unit by means of two discharge ducts, designated by the reference numerals 23a and 23b, which protrude vertically from said enclosed fireplace unit 1, so as to be available for heating the building and/or as sanitary water.
  • An opening, designated by the reference numeral 24, can be advantageously provided between the discharge ducts 23 for the connection of the flue, and the fumes generated during combustion can be expelled through the opening 24.
  • a refractory element is provided, designated by the reference numeral 25, which is adapted to prevent or at least limit the flow of heat that leaves the enclosed fireplace unit 1 toward the masonry possibly provided behind it, thus acting as a condensation-dissipating element.
  • the water enters the hollow plates 15 through the respective second ducts 14.
  • the water By rising along said hollow plates 15 toward the third ducts 20, the water is heated further by heat exchange with said hollow plates, since said plates receive heat by radiation from the flame center and by convection from the fumes, which exit through the hood 19 and strike their outer surfaces.
  • the presence of the recesses 18a and 18b increases the exchange of heat between the water and the hollow plates 15, since it increases the turbulence of the water, avoiding or reducing laminar flow.
  • the already-hot water undergoes a further temperature increase by passing through fourth ducts formed in a second labyrinth-like element 21 which protrudes above said hollow plates 15 and is also heated by radiation and convection.
  • two intake ducts 10a and 10b and two discharge ducts 23a and 23b are provided not so much to allow a possible simultaneous flow of two water streams as to facilitate the installation of the enclosed fireplace unit by providing an intake duct and a discharge duct on either side of the enclosed fireplace unit.
  • an enclosed fireplace unit having been provided which allows to achieve optimum heating of the water even a long time after installation, allowing to perform accurate and rapid cleaning of every part of the enclosed fireplace unit, especially of the hood.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Incineration Of Waste (AREA)
  • Resistance Heating (AREA)
  • Glass Compositions (AREA)

Claims (12)

  1. Insert de cheminée (1) destiné en particulier au chauffage de bâtiments et à celui de l'eau sanitaire, constitué de l'âtre (3) sur le périmètre duquel des cloisons latérales (4, 5a, 5b, 6a, 6b) dépassent vers le haut de façon à délimiter un foyer, une hotte (19) pour le raccord à un conduit de fumée placé au-dessus dudit foyer, au moins l'une des parois latérales étant composée par un premier élément en forme de labyrinthe (9) adapté pour le passage de l'eau provenant d'un ou de plusieurs conduits d'arrivée (10, 10a), caractérisé en ce que ledit élément en forme de labyrinthe (9) étant raccordé, dans sa partie supérieure, à plusieurs plaques creuses (15) disposées dans ladite hotte (19) ; sont raccordés, dans leur partie supérieure, à un deuxième élément en forme de labyrinthe (21) pour permettre le raccordement avec un ou plusieurs conduits d'évacuation (23a, 23b); et comportent un élément réfractaire (25) placé sur la partie postérieure, disposé entre le premier élément en forme de labyrinthe (9) et le deuxième élément en forme de labyrinthe (21).
  2. Insert de cheminée (1) selon la revendication 1, caractérisé par le fait que lesdites parois latérales (4, 5a, 5b, 6a, 6b) sont constituées par une première paroi verticale (4) disposée sur la partie arrière et raccordée latéralement à une deuxième paroi verticale (5a) et à une troisième paroi verticale (5b) disposées obliquement et raccordées à une quatrième paroi verticale (6a) et à une cinquième paroi verticale (6b) qui sont réciproquement parallèles et sont disposées sur des plans perpendiculaires à ladite première paroi verticale (4) ;
       ledit premier élément en forme de labyrinthe (9) comprend lesdites première, deuxième et troisième parois verticales (4, 5a, 5b), plusieurs premiers conduits (11) étant placés à l'intérieur dudit élément en forme de labyrinthe (9), lesdits conduits (11) étant disposés horizontalement, étant rassemblés verticalement et étant raccordés les uns aux autres au moyen de plusieurs coudes, de façon que l'eau puisse circuler à travers eux, en les traversant successivement l'un après l'autre.
  3. Insert de cheminé (1) selon les revendications 1 et 2, caractérisé par le fait que des conduits secondaires (14) prévus pour le raccordement desdits premiers éléments en forme de labyrinthe (9) à chacune desdites plaques creuses (15) dépassent horizontalement vers l'intérieur, à proximité du rebord supérieur dudit premier élément en forme de labyrinthe (9).
  4. Insert de cheminée selon les revendications 1 et 3, caractérisé par le fait que chacune desdites plaques creuses (15) est avantageusement constituée de deux éléments rectangulaires (16a, 16b) qui sont symétriques, chaque élément (15) comportant des bords recourbés et des coins chanfreinés, plusieurs creux circulaires (18a, 18b) étant formés sur leurs surfaces planes (17a, 17b).
  5. Insert de cheminée (1) selon les revendications 1 et 4, caractérisé par le fait que la profondeur desdits creux (18a, 18b) est approximativement égale à l'épaisseur de chacun desdits deux éléments rectangulaires (15), de façon à permettre leur raccordement réciproque effectué au niveau desdits creux (18a, 18b), lesdites plaques creuses (15) étant hermétiques à l'eau au niveau des zones de contact entre ladite paire d'éléments rectangulaires (16a, 16b)
  6. Insert de cheminée (1) selon les revendications 1 et 5, caractérisé par le fait que lesdits creux (18a, 18b), pratiqués à l'intérieur de ladite plaque creuse (15), sont adaptés afin d'augmenter la turbulence de l'eau, ce qui par conséquent augmente l'échange thermique, et afin de renforcer lesdites plaques creuses (15).
  7. Insert de cheminée (1) selon les revendications 1 et 6, caractérisé par le fait que lesdites plaques creuses (15) sont raccordées dans leur partie supérieure à un deuxième élément en forme de labyrinthe (21), en forme de L, de façon à dépasser au-dessus desdites plaques creuses (15) au moyen des troisièmes conduits respectifs (20) qui dépassent horizontalement en direction de la paroi arrière dudit insert de cheminé (1).
  8. Insert de cheminée (1) selon les revendications 1 et 7, caractérisé par le fait que ledit deuxième élément en forme de labyrinthe (21) est constitué de plusieurs quatrièmes conduits (22), disposés horizontalement, et rassemblés côte à côte et réciproquement raccordés au moyen de plusieurs coudes, de façon que le flux puisse les traverser successivement, l'un après l'autre, ce qui augmente ainsi l'échange thermique entre l'eau et ledit deuxième élément en forme de labyrinthe (21).
  9. Insert de cheminée selon les revendications 1 et 8, caractérisé par le fait que ledit élément réfractaire (25) constitué d'une plaque fabriquée dans un matériau réfractaire, est adaptée pour réduire le flux de chaleur qui s'échappe dudit insert de cheminée (1) par ladite paroi postérieure, agissant ainsi comme un dissipateur de condensation.
  10. Insert de cheminée selon les revendications 1 et 9, caractérisé par le fait qu'un ou plusieurs desdits conduits d'arrivée (10a, 10b) sont constitués de deux conduits d'arrivée (10a, 10b) disposés aux extrémités opposées dudit insert de cheminée (1).
  11. Insert de cheminée selon les revendications 1 et 10, caractérisé par le fait que lesdits un ou plusieurs conduits d'évacuation (23a, 23b) sont constitués de deux conduits d'évacuation (23a, 23b) disposés aux extrémités opposées dudit insert de cheminée (1).
  12. Insert de cheminée selon les revendications 1 et 11, caractérisé par le fait que lesdites plusieurs plaques creuses (15) comprennent quatre plaques creuses (15) chacune étant raccordée aux dits premier (9) et deuxième (21) élément en forme de labyrinthe au moyen dudit deuxième conduit (14) et troisième conduit (20) respectivement.
EP01105356A 2000-03-15 2001-03-08 Cheminée fermée, en particulier pour chauffage de bâtiments et d'eau sanitaire Expired - Lifetime EP1134498B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI000532 2000-03-15
IT2000MI000532A IT1317623B1 (it) 2000-03-15 2000-03-15 Struttura di termocaminetto particolarmente per il riscaldamento diedifici e di acqua sanitaria.

Publications (3)

Publication Number Publication Date
EP1134498A2 EP1134498A2 (fr) 2001-09-19
EP1134498A3 EP1134498A3 (fr) 2002-08-28
EP1134498B1 true EP1134498B1 (fr) 2004-09-15

Family

ID=11444467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01105356A Expired - Lifetime EP1134498B1 (fr) 2000-03-15 2001-03-08 Cheminée fermée, en particulier pour chauffage de bâtiments et d'eau sanitaire

Country Status (4)

Country Link
EP (1) EP1134498B1 (fr)
AT (1) ATE276486T1 (fr)
DE (1) DE60105468D1 (fr)
IT (1) IT1317623B1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334518A (en) * 1980-05-28 1982-06-15 Sol-Fire Inc. Heating system
GB2139345A (en) * 1983-05-05 1984-11-07 Heatway Boilers Limited Boilers for use in fireplaces

Also Published As

Publication number Publication date
EP1134498A2 (fr) 2001-09-19
ATE276486T1 (de) 2004-10-15
DE60105468D1 (de) 2004-10-21
ITMI20000532A1 (it) 2001-09-15
EP1134498A3 (fr) 2002-08-28
IT1317623B1 (it) 2003-07-15

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