EP0706014B1 - Hitzeschutzschild für Wärmetauscher - Google Patents

Hitzeschutzschild für Wärmetauscher Download PDF

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Publication number
EP0706014B1
EP0706014B1 EP95111715A EP95111715A EP0706014B1 EP 0706014 B1 EP0706014 B1 EP 0706014B1 EP 95111715 A EP95111715 A EP 95111715A EP 95111715 A EP95111715 A EP 95111715A EP 0706014 B1 EP0706014 B1 EP 0706014B1
Authority
EP
European Patent Office
Prior art keywords
heat
protection shield
heat protection
pipe
heat exchanger
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
EP95111715A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0706014A1 (de
Inventor
Marco Culzoni
Claudio Bassoli
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.)
Angelo Po Grandi Cucine SpA
Original Assignee
Angelo Po Grandi Cucine SpA
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 Angelo Po Grandi Cucine SpA filed Critical Angelo Po Grandi Cucine SpA
Publication of EP0706014A1 publication Critical patent/EP0706014A1/de
Application granted granted Critical
Publication of EP0706014B1 publication Critical patent/EP0706014B1/de
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
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details

Definitions

  • the invention relates to a heat shield made of solid material for heat exchangers with at least one burner chamber into which the open ends of heat exchanger tubes open out, openings in the heat protection shield at the Places are provided at which the heat exchanger tubes in the burner chamber open out and within the heat shield separating cuts or dividing lines are provided, the areas around the respective openings at least partially separate from each other.
  • Heat shields are used, for example, in gas-heated burner chambers Cookers used.
  • the structure of such a stove is for example in EP-A-551 807.
  • the kitchen stove described there has an oven space through which the heat exchanger tubes pass. These heat exchanger tubes open ends in one below the furnace space arranged burner chamber. Gas burners are arranged in the burner chamber, whose hot combustion gases are passed through the heat exchanger tubes become.
  • the object of the present invention is to provide heat shields for heat exchangers the genus specified at the outset, in which heat-related Tensions can largely be reduced.
  • this object is achieved with a generic heat protection shield made of refractory material, such as refractory ceramic, through the Features of the characterizing part of claim 1 solved. So that's it Heat shield not in contact with the walls of the combustion chamber, and connecting pipes extend at the edge of the openings of the heat protection shield, a in the end region of the connecting pipes and / or the heat exchanger pipes Socket pipe is arranged. As a result, heat-related tensions in the Heat protection shields directly impacted by the burner flames and in Transition area between connection and heat exchanger pipe more easily dismantled.
  • the connection pipes are basically the same to the respective in the assembled state Heat exchanger tubes aligned that the longitudinal axes of the connecting tubes as well of the respective heat exchanger tubes match. The connection can to the respective heat exchanger tubes in different ways.
  • the heat shield separating cuts may be provided between the individual openings in such a way that the heat-related deformations of the heat shield are canceled or be reduced.
  • the separating cuts can run around the respective entire opening, so that the form separate plates around the opening of the heat protection shield.
  • the non-interconnected plates of the heat protection shield can according to a preferred embodiment of the invention hung separately from each other be.
  • the individual panels can form one level when assembled.
  • the individual plates can be attached to the respective heat exchanger tubes their openings belong to be hung.
  • the individual plates can also be used be suspended from the edges of the respective connecting pipes. According to a preferred
  • the individual plates are attached to the respective heat exchanger tubes are hung, tapered so that they are a lampshade protrude straight into the burner chamber.
  • the heat shield can consist of two superimposed shields, but they stand alone have the features of the invention.
  • the connecting pipe in installed position inserted into the associated heat exchanger tube be, the connecting pipe with its outer wall on the inner wall of the heat exchanger tube, but its longitudinal displaceability remains guaranteed in the heat exchanger tube.
  • the connecting pipe and the end of the associated heat exchanger pipe can also have the same diameter and separate from each other and with each other be arranged in alignment, both through the sleeve pipe according to the invention are surrounded, which thus forms the connection between the two tubes.
  • Either the connecting pipe or the end of the associated heat exchanger pipe or both can also be longitudinally displaceable in the socket pipe be stored.
  • the connecting pipe can be assembled State in the respectively assigned heat exchanger tube to form a Annular gap between the outer surface of the connecting pipe and the inner surface of the heat exchanger tube.
  • Another alternative embodiment may consist in that the connecting pipe has a larger diameter than the heat exchanger tube and thus lies outside the end of the respectively assigned heat exchanger tube. Also an annular gap is then formed here, which, however, is between the outer circumference of the heat exchanger tube and the inner circumference of the connecting tube extends.
  • the heat protection shield consists of two shields lying on top of each other, it is possible that the separating cuts or lines of these two superimposed Layers are not congruent, but cross each other.
  • the connecting pipes can be above the heat shield as well as below the heat shield, in relation to the position of the Brenners, start.
  • the heat shield according to the invention can not only in kitchen stoves, but also generally in burner chambers of boilers or, for example, in gas-heated ones Find hotplates application.
  • the heat shield 20 also forms the cover the burner chamber.
  • the heat shield could also be used in the same way be moved into the burner chamber.
  • a connecting pipe 18 is on the plate 26 of the heat shield 20 attached.
  • This connecting tube 18 is coaxial with one Heat exchanger tube 32 aligned, with its free end approximately with that Floor 34 of the furnace space closes.
  • the opening of the furnace floor 34 is bent over at the edge, as is shown in more detail in FIG. 1.
  • a crack Between two coaxially arranged pipe sections which have the same diameter, is left a crack. This is from a sleeve pipe 36, which is bent on the Edge of the furnace floor 34 is welded, bridged.
  • the connecting pipe has an outer diameter of approximately corresponds to the inside diameter of the heat exchanger tube.
  • the connecting pipe can be inserted into the heat exchanger pipe, whereby the respective diameters of the pipes can be coordinated with one another, that the connecting pipe within the heat exchanger pipe, for example thermal expansion, can expand.
  • the outer diameter of the Connection tube has a smaller diameter than the inner diameter of the heat exchanger tube. In this case there remains after inserting the connecting pipe into the heat exchanger tube between the outside diameter of the Connection pipe and the heat exchanger pipe an annular gap.
  • FIG. 2 largely corresponds to that according to the Fig. 1.
  • a sleeve pipe 36 is also arranged here. However, here is the diameter of the connecting tube 18 chosen larger than the outer diameter of the Heat exchanger tube 32 or the sleeve tube 36 surrounding this end. The difference in diameter is chosen so that an annular gap between the Outside diameter of the sleeve pipe 36 and the inside diameter of the connecting pipe 18 remains, as shown in Fig. 2.
  • FIG. 3 largely corresponds to that according to FIG. 2.
  • the heat shield made of two shields lying on top of each other educated.
  • the connecting tubes 18 form with the heat shield 20 an integral unit.

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)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Details Of Fluid Heaters (AREA)
EP95111715A 1994-10-07 1995-07-25 Hitzeschutzschild für Wärmetauscher Expired - Lifetime EP0706014B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9416203U DE9416203U1 (de) 1994-10-07 1994-10-07 Hitzeschutzschild für Wärmetauscher
DE9416203U 1994-10-07

Publications (2)

Publication Number Publication Date
EP0706014A1 EP0706014A1 (de) 1996-04-10
EP0706014B1 true EP0706014B1 (de) 1999-10-20

Family

ID=6914635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111715A Expired - Lifetime EP0706014B1 (de) 1994-10-07 1995-07-25 Hitzeschutzschild für Wärmetauscher

Country Status (6)

Country Link
EP (1) EP0706014B1 (da)
AT (1) ATE185890T1 (da)
DE (2) DE9416203U1 (da)
DK (1) DK0706014T3 (da)
ES (1) ES2138689T3 (da)
GR (1) GR3032448T3 (da)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9372005B2 (en) 2012-11-30 2016-06-21 Alto-Shaam, Inc. Heat exchanger for oven

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707186A (en) * 1971-01-18 1972-12-26 Foster Wheeler Corp Cooling tube ferrule
DD239465A1 (de) * 1985-07-18 1986-09-24 Kali Veb K Vorrichtung zur verschleissminderung suspensionsdurchstroemter rohrbuendelwaermeaustauscher
FR2661244B1 (fr) * 1990-04-19 1994-08-05 Olifan Vibracim Sa Embout de protection pour tube de chaudiere et son procede de fabrication.
IT229213Y1 (it) 1992-01-08 1998-07-02 Lainox Srl Perfezionamento della camera di combustione particolarmente nei forni a convenzione forzata per la cottura di vivande
EP0567674B1 (de) * 1992-04-29 1994-02-23 Deutsche Babcock-Borsig Aktiengesellschaft Wärmetauscher zum Kühlen von in einer Kohlevergasungsanlage erzeugtem Synthesegas
DE4239689A1 (de) * 1992-11-26 1994-06-01 Wiesheu Gmbh Wärmetauscher mit Flammbeheizung

Also Published As

Publication number Publication date
ES2138689T3 (es) 2000-01-16
DE9416203U1 (de) 1994-12-01
ATE185890T1 (de) 1999-11-15
GR3032448T3 (en) 2000-05-31
DK0706014T3 (da) 2000-01-03
EP0706014A1 (de) 1996-04-10
DE59507088D1 (de) 1999-11-25

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