EP1376014B1 - Heating stove type fireplace - Google Patents

Heating stove type fireplace Download PDF

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Publication number
EP1376014B1
EP1376014B1 EP03396058A EP03396058A EP1376014B1 EP 1376014 B1 EP1376014 B1 EP 1376014B1 EP 03396058 A EP03396058 A EP 03396058A EP 03396058 A EP03396058 A EP 03396058A EP 1376014 B1 EP1376014 B1 EP 1376014B1
Authority
EP
European Patent Office
Prior art keywords
heat
fireplace
storage unit
heat storage
gases
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
EP03396058A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1376014A2 (en
EP1376014A3 (en
Inventor
Juhani c/o Nunnanlahden Uuni Oy Lehikoinen
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.)
NunnaUuni Oy
Original Assignee
NunnaUuni Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NunnaUuni Oy filed Critical NunnaUuni Oy
Publication of EP1376014A2 publication Critical patent/EP1376014A2/en
Publication of EP1376014A3 publication Critical patent/EP1376014A3/en
Application granted granted Critical
Publication of EP1376014B1 publication Critical patent/EP1376014B1/en
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
    • F24B1/20—Ranges
    • F24B1/24—Ranges with built-in masses for heat storage or heat insulation
    • 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

Definitions

  • the invention relates to a heating stove type fireplace according to the introduction of claim 1.
  • This prior art is also known from FR-A-25 289 951 .
  • Heating stoves are traditionally fireplaces intended for quick heating.
  • the heating stove contains a metal shell surrounding the furnace that extends upward to form a channel for rising smoke and a chimney connection, through which smoke gases are guided into the smoke chimney. Because the heating stove releases the heat it creates for all practical purposes immediately through its metal shell to the surrounding airspace, it is quick-heating if wood is burned in it efficiently and cleanly.
  • the object of the invention is to remove the above-mentioned disadvantages.
  • the object of the invention is to provide a novel heating stove type fireplace that would further make possible traditional quick heating, but would also make possible the effective use of the energy contained in wood and clean burning without unclean burn gases.
  • a heating stove fireplace for heating a living space contains a metal shell surrounding a furnace with an openable hatch and a grate.
  • a heat storage unit of a material that can well withstand the stress of high temperatures and that quickly stores heat.
  • a burn gases afterglow heat transfer unit to effect direct transfer of heat from burn gases that come from the heat storage unit and still contain heat energy to the airspace surrounding the fireplace.
  • the fireplace has a chimney connection for smoke gases after the afterglow heat transfer unit.
  • the heat-storing mass consists of many parallel and preferably vertical plates slightly distant from one another and of a heat-storing material.
  • the distances between the plates form smoke channels.
  • the plates can be for example soapstone plates of uniform thickness where plate thickness is about double the width of the distance between individual plates. In this way 5-10 plates can be fit into the heating stove creating a large, effectively heat-absorbing surface.
  • the basis of this invention is that effective and clean burning requires a relatively fast and high-temperature burn process.
  • this burn process can usefully be joined with a heating stove type fireplace, the heat energy of the hottest burn gases must be stored immediately, before the heat of the heating stove is transferred to the outer shell. From this was born the basic idea of the invention, i.e. the locating of a heat storage unit within a traditional heating stove in-between the furnace and the metal shell of the heating stove that releases heat outward into the area of the room.
  • the fireplace releases the heat of partially cooled burn gases through the metal shell in the manner of a traditional heating stove while at the same time, during the heating phase, storing the greater part of the heat in a heat storage unit.
  • the heat storage unit begins to release heat through the metal shell and the other structures of the fireplace.
  • the heating stove according to the invention works thus not only in the manner of a traditional heating stove as a quick heater, but also as a long-term source of heat that releases heat slowly while also making possible very low emission and clean smoke gases that have largely released their heat.
  • the heat transfer unit for burn gases afterglow consists of a part of the metal shell whose inner surface is in direct contact with the smoke gases coming from the heat storage unit.
  • the outer shell of the fireplace is tight-fitting and without openings in the area of the afterglow heat transfer unit as well as after it in the flow direction of smoke gases.
  • the furnace is made of heat-storing materials such as soapstone that form the rear wall, side walls and also the cover structure of the throat leading towards the heat storage unit.
  • heat-storing structures work, in addition to the main heat-storing unit located after the furnace, as structures that rapidly store heat energy. This makes possible a burning event in the furnace with cleaner smoke gases that occurs at a higher temperature and is more effective than previously possible without having the temperature of the outer shell of the heating stove rise to dangerous levels.
  • the chimney connection of the heating stove is above the afterglow heat transfer unit.
  • the heating stove is relatively small in both depth and width.
  • the furnace, heat storage unit, afterglow heat transfer unit and chimney connection are partially or completely located in relationship to each other adjacent, stacked on top of one another, or fit in some other way as will be apparent later in this description.
  • the metal outer shell for example a surface shell of heat-storing material.
  • the metal shell can be covered completely, for example with tiles or soapstone or some other type of stone tile that possesses a desired colour and appearance.
  • the afterglow heat transfer unit performing preferably direct and fast heat transfer of the smoke gases, is located inside the surface shell so that one can use flow openings in the surface shell to create airflow from the heat transfer unit to the airspace surrounding the fireplace.
  • the heat storage unit located after the furnace consists of a huge heat-storing mass, such as a soapstone structure, through which are arrayed a plurality of rising and/or transverse smoke channels to increase heat transfer surface area between the hot smoke gases and the mass.
  • the mass must essentially have a relatively large heat transfer surface area, i.e. the sum of the surface areas of the gas channels travelling through and around the mass. This enables effective and fast heat transfer to the heat-storing material from very hot, perhaps partially still burning smoke gases.
  • the plates can be used flow distributors, for example plate-like guides of metal or soapstone.
  • flow distributors for example plate-like guides of metal or soapstone.
  • the entire volume of the heat storage unit functions at essentially the same temperature and at maximum power to store an integral part of the heat energy of the hot smoke gases and to release out to the metal shell of the heating stove a flow of warm, i.e. not too hot, gases.
  • both the heat storage and heat release features of the heat storage unit can be adjusted.
  • the soapstone plates of the mass can be attached on all sides to the surrounding metal shell, wherein the smoke channels traverse only within the heat-storing mass. Heat is thus effectively stored into the heat storage unit, while the outer surface of the fireplace in the area of the heat storage unit stays relatively cool during heating. This way heat flow in the surrounding area during heating occurs through the smoke gases afterglow heat transfer unit.
  • the metal shell extends in a vertical direction up the fireplace from the bottom part level of the furnace up to the chimney connection. This way the metal shell can function as the load-bearing structure of the fireplace and as its outer shell. It is also possible that the metal shell is vertical only in the area of the heat storage unit and from there outward forming the afterglow heat transfer unit. It is even possible that the metal shell rests on and seals only in the upper part of the heat storage unit and continues from there upward, wherein the outer surface of the furnace area and the greater part of the outer surface of the heat storage unit area can be for example the same soapstone structure that forms the furnace and heat storage unit.
  • brackets, props, or other supports in the metal shell from the lower edge of the fireplace upwards over essentially its entire height can be used to provide support for the entire massive heat-storing inner part of the fireplace. This way the weight of the heat storage unit does not lie on the structures of the fireplace, making possible the tearing out and rebuilding, i.e. the exchanging, if needed, of the heat-storing wall structures of the furnace without disturbing the upper structures of the fireplace.
  • a heating stove type fireplace according to the invention is of modular structure, i.e. it is composed of three suitably measured modules separately distinguished by measurement of their desired heating characteristics and located on top of one another and/or adjacent, the furnace module, the heat storage module, the heat transfer module.
  • the modules are separately attachable to one another, making possible modules of different size and shape.
  • the number of modules is also variable, because multiple heat storage heat storage modules as well as possibly multiple heat transfer modules can be arranged one after the other and/or one on top of the other.
  • the thickness of the heat-storing mass of the furnace walls i.e. their heating capacity, the height of the furnace as well as the form of the hatch or the size of its opening can all vary.
  • the shape and number of the smoke channels the amount of heat-storing mass and the amount of usable heat-storing mass can all vary, as well as height/width/depth of the entire heat storage unit. The adjustment of height/width/depth is preferably achieved by having the heat storage unit be composed of two or more stacked or adjacent cheaply identical heat storage modules.
  • a suitable heat transfer unit can be chosen to follow it. It may be relatively low and have a conical reduction of the furnace towards the chimney connection, or it may have more height and therefore more also a greater heat transfer surface area. It can also be larger and wider than the heat storage module located before it.
  • the inner surface of the heat transfer module which is in contact with the smoke gases, can also have heat transfer fins used to increase heat absorption. In the same way its outer surface can have convex shape that for example form decorations, but also increase exterior surface area for heat release.
  • a control is arranged in the fireplace that enables bypass of the heat storage unit for a short time, for example when it is desired to quickly get heat into a room area.
  • the control is used to guide hot burn gases directly to the afterglow heat transfer unit.
  • the fireplace can even have, in conjunction with the control, a separate express heater, i.e. a heat-conducting shell before the afterglow heat transfer unit such that direct heat transfer surface area into the area of the room is noticeably greater than during normal heating.
  • a heating stove type fireplace according to the invention has significant advantages compared to known prior art. Since there is often a need to get quick heat, the heating stove has its own application area. In addition, its small size and relative lightness are often are often critical factors when purchasing a heating device. A fireplace according to the invention has managed to retain all the aforementioned positive attributes of the traditional heating stove. In addition, an attempt has been made to add new heating technologies and effective heat storage capacity such as to create a wholeness where, with less amount of fuel and cleaner smoke gases, better heating characteristics are achieved for both quick heat production and long-term and even heat release.
  • This invention makes possible the burning of wood and briquettes at a temperature of 800°C or more, preferably at a temperature of approximately 1000°C. Using these structures and methods the energy use relationship of the fireplace is increased 10-30%, even 50%, compared to traditional heating stoves.
  • the heating stove type fireplace in figure 1 contains a metal outer shell 1, which extends from the very bottom edge of the fireplace upward for the entire height of the fireplace.
  • the fireplace has a furnace 4 with a hatch (not illustrated) and a grate 3 and that opens upward through the throat to the heat storage unit 5.
  • the metal outer shell 1 narrows greatly forming a tapering surface towards the upward-pointing chimney connection, which forms the smoke gases afterglow heat transfer unit 6.
  • the inside of the metal shell of the heat transfer unit 6 is in direct contact with the still relatively warm smoke gases rising from the heat storage unit and on the outside it is in direct contact with the airspace 7 to be heated. Therefore, heat energy is allowed to rapidly and effectively move through the metal shell 6 and a relatively well-cooled flow of smoke gases rises to the chimney connection 8.
  • the fireplace in figure 1 can be of modular structure such that the modules are separate from one another and thus combinative and stackable one on top of the other in a suitable combination.
  • the furnace module 17 is of course at the bottom.
  • On top of this are stacked three identical heat storage modules 18, on top of which is located the heat transfer module 19.
  • figure 1 also shows supports 20 attached to the outer shell 1, on which the heat storage modules 18, i.e. the upper massive parts of the fireplace above the furnace, rests so that the furnace wall structures can be changed or maintained without dismantling the entire heating stove.
  • the heat storage modules 18, i.e. the upper massive parts of the fireplace above the furnace rests so that the furnace wall structures can be changed or maintained without dismantling the entire heating stove.
  • the furnace 4 consists of a rear wall 9 and side walls 10 of heat-storing soapstone, as well as cover structure 11 of the furnace, also of soapstone, load-bearing blocks, which form the throat towards the heat storage unit 5.
  • heat storage unit 5 In heat storage unit 5 are six upright, adjacent plates 15, each of which is composed of six soapstone plates.
  • the plates 15 are parallel and suitably distant from one another such, that the area between the plates forms vertically-leading smoke channels 14.
  • metal flow distributors 16 i.e. guides for the upward-rising flow of smoke gases. Through these the hot, rising smoke gases are guided as evenly as possible across the entire surface area of the plates 15, such that the storage of heat into the soapstone plates is effective.
  • Figure 3 shows another embodiment of this invention, in which the furnace 4 and the heat storage unit 5 located above it are like those in the embodiment of figure 1 .
  • the metal outer shell 2 begins only above the furnace, i.e. from the lower edge of the heat storage unit 5. It is also possible that it begins only from near the upper edge of the heat storage unit.
  • the fireplace in the embodiment of this figure is further surrounded by a surface shell 12 of preferably soapstone.
  • the surface shell forms preferably a front wall, rear wall, side walls and cover for the fireplace.
  • Figures 4-7 show by way of example different structural alternatives of how the different parts of a fireplace according to the invention can be located in relationship to one another. There are of course even more possible alternatives.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)
  • Incineration Of Waste (AREA)
  • Tunnel Furnaces (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Resistance Heating (AREA)
EP03396058A 2002-06-20 2003-06-16 Heating stove type fireplace Expired - Lifetime EP1376014B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20021205A FI20021205A0 (fi) 2002-06-20 2002-06-20 Tulisija
FI20021205 2002-06-20

Publications (3)

Publication Number Publication Date
EP1376014A2 EP1376014A2 (en) 2004-01-02
EP1376014A3 EP1376014A3 (en) 2006-11-22
EP1376014B1 true EP1376014B1 (en) 2009-07-29

Family

ID=8564197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03396058A Expired - Lifetime EP1376014B1 (en) 2002-06-20 2003-06-16 Heating stove type fireplace

Country Status (4)

Country Link
EP (1) EP1376014B1 (fi)
AT (1) ATE438067T1 (fi)
DE (1) DE60328563D1 (fi)
FI (1) FI20021205A0 (fi)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2473842C1 (ru) * 2011-08-25 2013-01-27 Владимир Иванович Коштаков Способ кладки печей и каминов

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2267370A1 (de) * 2009-06-23 2010-12-29 Peter Kobler Verbrennungsofen
EP2330352B1 (en) * 2009-12-02 2016-07-27 Nunnanlahden Uuni Oy Fireplace
FI122198B (fi) * 2010-01-15 2011-10-14 Tulikivi Oyj Järjestely varaavassa tulisijassa

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2528951B1 (fr) * 1982-06-22 1987-02-20 Gravier Maurice Dispositif pour la recuperation de calories dans un foyer et procede pour sa realisation
CH647856A5 (en) * 1982-09-30 1985-02-15 Hans Peter Fryand Device for accumulating heat, in particular in a fireplace or fireplace furnace
DE8716439U1 (de) * 1987-12-12 1988-05-26 Champ Sauna Sonne Freizeit Vertriebsgesellschaft mbH, 3589 Knüllwald Umluft-Kachelofen mit Wärmespeicher

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2473842C1 (ru) * 2011-08-25 2013-01-27 Владимир Иванович Коштаков Способ кладки печей и каминов

Also Published As

Publication number Publication date
DE60328563D1 (de) 2009-09-10
EP1376014A2 (en) 2004-01-02
ATE438067T1 (de) 2009-08-15
FI20021205A0 (fi) 2002-06-20
EP1376014A3 (en) 2006-11-22

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