EP0959303A2 - Kamin - Google Patents

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Publication number
EP0959303A2
EP0959303A2 EP99660080A EP99660080A EP0959303A2 EP 0959303 A2 EP0959303 A2 EP 0959303A2 EP 99660080 A EP99660080 A EP 99660080A EP 99660080 A EP99660080 A EP 99660080A EP 0959303 A2 EP0959303 A2 EP 0959303A2
Authority
EP
European Patent Office
Prior art keywords
fireplace
steel casing
envelope
firebox
forms
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.)
Withdrawn
Application number
EP99660080A
Other languages
English (en)
French (fr)
Inventor
Antti Lehikoinen
Mika Nykyri
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0959303A2 publication Critical patent/EP0959303A2/de
Withdrawn legal-status Critical Current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
    • F24B1/185—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion
    • F24B1/188—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by use of heat exchange means , e.g. using a particular heat exchange medium, e.g. oil, gas  
    • F24B1/1885—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by use of heat exchange means , e.g. using a particular heat exchange medium, e.g. oil, gas   the heat exchange medium being air only
    • 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 present invention relates to a fireplace as defined in the preamble of claim 1.
  • Prior art in the field of the invention is represented in the first place by various stoves with a sheet metal casing, with a firebox inside the sheet metal casing and heat storing material surrounding the firebox. After the heat storing material has been heated, it slowly delivers heat through the sheet metal casing into the surrounding space to be heated.
  • stoves with a sheet metal casing have certain drawbacks. Since the stoves store a large amount of heat, they are slow in becoming heated and it is therefore only after a relatively long time that they can deliver heat into the surrounding space to be heated. Moreover, the sheet metal casing of a well-heated stove is often burning hot for a long time, thus constituting an obvious safety risk at least for small children and animals. In addition, a stove with a sheet metal casing is often simple and ascetic in appearance and so it does not meet the aesthetic standards of modern consumers.
  • a specific object of the present invention is to disclose a new type of fireplace which is relatively light and simple and can be quickly installed and which efficiently stores heat, delivering it slowly an uniformly over a long time, which also quickly heats the surrounding space to be heated, whose surface temperature is always at a safe low level and which also has a pleasing appearance that can be easily shaped to fit the environment and user preferences.
  • the fireplace of the invention comprises a core part of massive heat storing material, such as e.g. soapstone, provided with a firebox and at least one side duct opening from above the firebox in a downward direction for passing combustion gases from above the firebox downward and further into an exit flue.
  • the fireplace comprises a substantially continuous steel casing surrounding the core on the front, back and lateral sides.
  • the steel casing forms the load-bearing structure of the fireplace, and the fireplace comprises an envelope of massive heat storing material placed outside the steel casing in contact with it.
  • the steel casing forms a vertical air duct.
  • the air duct comprises an interior wall, which forms the outer surface of a side duct, and an exterior wall, which is in contact with the envelope. Moreover, the inlet opening of the air duct is located in the lower part of the fireplace and the outlet opening is located in the upper part of the fireplace.
  • the air duct and the side duct form an effective heat exchanger based on a counterflow principle, in which downward flowing hot combustion gases heat a cooler rising air flow on the well-known counterflow principle so that the air flowing out at the upper end is at a higher temperature than the combustion gases flowing out into the flue at the lower end.
  • the envelope made of e.g. relatively thin soapstone plates, having a thickness of e.g. about 35 mm, is attached directly to the steel casing so that it is in immediate contact with it, with practically no gap between them. This prevents excessive heating of the steel casing and ensures effective heat transfer from the steel casing to the envelope.
  • the fireplace of the invention provides the advantage of easy, fast and simple installation as the steel casing holds the core part in place; cheap and relatively light structure; effective heating properties; safe surface temperatures; fast initial heating thanks to the air ducts; and a potential for diversified and vivid variations of external appearance as the steel casing forms the load-bearing structure of the fireplace.
  • the fireplace presented in the figures comprises a core part of the stove, with a firebox 1 surrounded by massive soapstone pieces 8 at the back and sides.
  • the fireplace has a fire door 9 in front of the firebox and an ash box with an ash door 10 below the firebox, as is known in the art.
  • the gas flow is distributed in a known manner into side ducts 2 leading downward on both sides of the firebox at the edges of the firebox, the side ducts meeting in a single duct below and behind the firebox to pass the combustion gases into an exit flue.
  • the core part is surrounded at the front and back and on both sides by a substantially continuous steel casing 3, which forms the load-bearing structure of the fireplace.
  • the steel casing encloses the entire core part of the fireplace, with only openings provided in the areas opposite the fire door 9 and the ash door 10.
  • the side ducts 2 are thus formed in a space delimited by the massive soapstone pieces 8 at the sides of the firebox 1, soapstone edge pieces 11 placed at their ends and the steel casing.
  • the steel casing 3 has a two-layer structure, in other words, it forms vertical air ducts 5, in which the interior wall 12 of the air duct faces against the side duct 2 and the exterior wall 13 of the air duct delimits the air duct 5 on its outer side.
  • a soapstone envelope 4 Mounted in the immediate vicinity of the steel casing 3, i.e. in contact with its exterior surface, on the front side of the fireplace and in contact with the exterior wall 13 on both sides is a soapstone envelope 4.
  • the envelope 4 is in close contact with the steel casing 3 over its entire area.
  • the air ducts 5 run substantially through the entire height of the fireplace inside the envelope 4, between the interior wall 12 and exterior wall 13 of the steel casing 3, from an intake opening 6 at the lower edge of the fireplace to an outlet opening 7 at the upper edge of the fireplace.
  • the intake 6 and outlet 7 openings are orifices made in the side surfaces of the envelope of the fireplace, and they can be additionally provided with various adjusting or closing elements.
  • the fireplace When the fireplace is being heated, its massive core part stores heat rapidly and effectively. However, some of the heat is transferred to the steel casing 3, from which the heat is effectively conducted to the soapstone envelope mounted in immediate contact with it. The envelope also effectively stores heat and delivers it uniformly into the space to be heated. In spite of its good heat storing capability, the fireplace also rapidly heats the ambient air because immediately after a fire has been lit, the combustion gases flowing downward in the side ducts heat the interior wall 12 of the steel casing, which forms the outer surface of the side duct, the air duct 2 being on the other side of said wall. Thus, immediately after a fire has been lit in the fireplace, an efficient air flow starts flowing in the air duct in the opposite direction relative to the gas flow in the side duct, thus quickly circulating and heating the air in the space surrounding the fireplace.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)
EP99660080A 1998-05-20 1999-05-18 Kamin Withdrawn EP0959303A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI981123 1998-05-20
FI981123A FI981123A7 (fi) 1998-05-20 1998-05-20 Tulisija

Publications (1)

Publication Number Publication Date
EP0959303A2 true EP0959303A2 (de) 1999-11-24

Family

ID=8551768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99660080A Withdrawn EP0959303A2 (de) 1998-05-20 1999-05-18 Kamin

Country Status (2)

Country Link
EP (1) EP0959303A2 (de)
FI (1) FI981123A7 (de)

Also Published As

Publication number Publication date
FI981123A7 (fi) 1999-11-21
FI981123A0 (fi) 1998-05-20

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