EP0856705A1 - Wärmetauschereinrichtung - Google Patents
Wärmetauschereinrichtung Download PDFInfo
- Publication number
- EP0856705A1 EP0856705A1 EP97120541A EP97120541A EP0856705A1 EP 0856705 A1 EP0856705 A1 EP 0856705A1 EP 97120541 A EP97120541 A EP 97120541A EP 97120541 A EP97120541 A EP 97120541A EP 0856705 A1 EP0856705 A1 EP 0856705A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- bend
- exchanger tube
- tube
- cantilevered
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- F28D7/08—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 otherwise bent, e.g. in a serpentine or zig-zag
-
- 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
- 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
- F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising
Definitions
- the invention relates to a heat exchanger device a fan wheel, in particular a radial fan wheel, a Burner and at least one associated with the burner Heat exchanger tube which surrounds the fan wheel.
- Such a heat exchanger device is known from EP 0 526 768 B1 known; it is used to cook food in a cooking chamber of a corresponding device.
- the heat exchanger tube preferably has in the region of the cantilever Bend an enlarged cross section. Because of the reversal of the flow direction results in Area of the bend increased due to a vortex formation Flow resistance, which by the invention Cross-sectional expansion is compensated. Ideally is this expanded cross section dimensioned so that the Flow resistance in the area of the bend essentially is the same as in the two pipe sections to which the Guide the bend towards or away from it. With that the Avoid danger of local overheating.
- An enlarged cross section in the cantilever area Bend can be achieved in particular that the two pipe sections, which are the cantilevered bend form, meet at an acute angle.
- the heat exchanger tube advantageously has Cantilever bend an oval Cross-section.
- the cantilevered bend can preferably be caused by a change in direction be formed by 180 ° in the heat exchanger tube.
- the cantilevered bend horizontal or vertical end creates that first with a sufficient distance to other system components can be provided so that thermal expansion without problems can be included or compensated.
- the cantilevered bend is more preferably removed from Fastening points of the heat exchanger tube on a housing wall or the like provided.
- the heat exchanger tube around the fan wheel along the outline a rectangular surface.
- the heat exchanger tube surrounds the fan in the form of a square or rectangle, the pipe curvatures in the respective Corners of this rectangle.
- this arrangement is the usual cuboid Geometries of rooms for the heat treatment of food advantageous because in this way an optimal use of space is achieved.
- the heat exchanger tube following the bend parallel to the Mr. Touch can be returned, so that a compact and simple arrangement of the heat exchanger tube can be made can.
- the invention makes it possible without expensive corrugated pipes get along and in particular heat exchanger tubes use that are at least smooth on the outside. This enables hygienic, advantageous cleaning.
- the tube can be made sufficiently solid be so that the risk of mechanical damage is low is and the lifespan and operational safety are guaranteed.
- a heat exchanger device is preferred, as before described in a device for heat treatment of Food used, the heat exchanger device in Cooking space of the device can be arranged without adverse influences on the food to be cooked would be feared.
- the simple cleaning options represent a particular advantage of the heat exchanger device for the intended use.
- FIGS. 1 and 2 In the heat exchanger devices shown in FIGS. 1 and 2 are all surrounding components, such as Housing parts, fastening parts, connections and the like omitted.
- a heat exchanger tube 14 placed such that it is initially based on a combustion chamber 12 in the there is a burner or on which a burner acts, essentially along a square outline is guided, being in the corner areas of the imagined Squares the curvature of the pipe according to the material specification is laid.
- the heat exchanger tube 14 After the heat exchanger tube 14 almost one complete circulation around the fan 10 is formed it returned with a change of direction of 180 °, forming a cantilevered bend 16 which according to the drawing, down depends and one sufficient to absorb the thermal expansion Distance from other system components.
- the heat exchanger tube 14 is then on the outline of the same square returned and ends in a not shown Connection. As long as the attachment points are sufficient are removed from the cantilevered bend 16, these are relieved of the thermal stresses that for the most part of the cantilevered bend 16 or the one formed thereby End section are included.
- the two pipe sections 16a and 16b meet at an acute angle in the region of the cantilevered bend 16.
- the heat exchanger tube has an essentially circular cross section with a diameter D 1 .
- the tube has an essentially elliptical cross section, the small axis of the ellipse having the length D 1 and the large axis of the ellipse having the length D 2 .
- D 2 is about 1.2 to 1.4 times D2, for example 1.3 times.
- the cross-sectional area of the heat exchanger tube 14 in the region of the bend 16 is approximately 20% to 40% larger than in the other regions of the tube 14.
- an enlarged tube cross section in the other bent regions of the heat exchanger tube, in particular in the Edge areas can be provided with a deflection of substantially 90 °.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cookers (AREA)
Abstract
Description
- Fig. 1
- eine schematische perspektivische Ansicht einer Wärmetauschereinrichtung gemäß einer ersten Ausführungsform der Erfindung und
- Fig. 2
- eine schematische Teilansicht der freikragenden Biegung bei einer zweiten Ausführungform der Erfindung.
- Fig.3
- einen Querschnitt entlang der Linie III-III in Fig. 2.
- 10
- Lüfterrad
- 12
- Brennkammer
- 14
- Wärmetauscherrohr
- 16
- Freikragende Biegung
- 16a, 16b
- Rohrabschnitte im Bereich der Biegung
Claims (10)
- Wärmetauschereinrichtung, mit einem Lüfterrad, insbesondere einem Radial-Lüfterrad, einem Brenner und zumindest einem dem Brenner zugeordneten Wärmetauscherrohr, welches das Lüfterrad umgibt, dadurch gekennzeichnet, daß das Wärmetauscherrohr (14) in zumindest einem Abschnitt zu einer freikragenden Biegung (16) gekrümmt ist.
- Wärmetauschereinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Wärmetauscherrohr (14) im Bereich der freikragenden Biegung (16) einen vergrößerten Querschnitt aufweist.
- Wärmetauschereinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die beiden Rohrabschnitte (16a, 16b), welche die freikragende Biegung (16) bilden, in einem spitzen Winkel aufeinandertreffen.
- Wärmetauschereinrichtung nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß das Wärmetauscherrohr im Bereich der freikragenden Biegung (16) einen ovalen Querschnitt aufweist.
- Wärmetauschereinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die freikragende Biegung (16) durch eine Richtungsänderung im Wärmetauscherrohr (14) um 180° gebildet ist.
- Wärmetauschereinrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die freikragende Biegung (16) entfernt von Befestigungsstellen des Wärmetauscherrohres (14) an einer Gehäusewand oder dergleichen vorgesehen ist.
- Wärmetauschereinrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Wärmetauscherrohr (14) um das Lüfterrad (10) entlang des Umrisses einer rechtwinkligen Fläche geführt ist.
- Wärmetauschereinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die freikragende Biegung (16) an der Stelle oder in der Nähe der Stelle eines vollständigen Umlaufs des Wärmetauscherrohrs (14) um das Lüfterrad (10) vorgesehen ist.
- Wärmetauschereinrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Wärmetauscherrohr (14) ein an der Außenseite glattes Rohr ist.
- Verwendung der Wärmetauschereinrichtung nach einem der vorangehenden Ansprüche in einer Vorrichtung zur Wärmebehandlung von Speisen, wobei die Wärmetauschereinrichtung bevorzugt im Garraum der Vorrichtung angeordnet ist.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19703319 | 1997-01-30 | ||
DE19703319 | 1997-01-30 | ||
DE19708231 | 1997-02-28 | ||
DE19708231A DE19708231C2 (de) | 1997-01-30 | 1997-02-28 | Wärmetauschereinrichtung für eine Vorrichtung zur Wärmebehandlung von Speisen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0856705A1 true EP0856705A1 (de) | 1998-08-05 |
EP0856705B1 EP0856705B1 (de) | 2002-02-20 |
Family
ID=26033488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97120541A Expired - Lifetime EP0856705B1 (de) | 1997-01-30 | 1997-11-24 | Wärmetauschereinrichtung |
Country Status (4)
Country | Link |
---|---|
US (1) | US5915372A (de) |
EP (1) | EP0856705B1 (de) |
JP (1) | JP3021411B2 (de) |
AT (1) | ATE213532T1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0926447A1 (de) * | 1997-12-23 | 1999-06-30 | RATIONAL GmbH | Gargerät mit Wärmerückführung |
DE102004004393B3 (de) * | 2004-01-29 | 2005-05-25 | Rational Ag | Gargerät, Luftleitglied, Haltevorrichtung und Verfahren zum Reinigen eines Gargeräts |
FR2899317A1 (fr) * | 2006-04-03 | 2007-10-05 | Thirode Grandes Cuisines Poligny | Dispositif d'echangeur thermique de bruleur a gaz |
DE202011005261U1 (de) | 2010-04-14 | 2011-10-27 | Jaroslav Klouda | Heißluftwärmetauscher für Gargeräte, beispielsweise Kombidämpfer, Back- und Grillgeräte |
ITTO20100632A1 (it) * | 2010-07-21 | 2012-01-22 | Premark Feg Llc | Scambiatore di calore migliorato per un dispositivo di processamento di cibo e forno provvisto dello stesso |
US9372005B2 (en) | 2012-11-30 | 2016-06-21 | Alto-Shaam, Inc. | Heat exchanger for oven |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1311159B1 (it) * | 1999-11-30 | 2002-03-04 | Angelo Grandi Cucine Spa | Dispositivo scambiatore di calore per forni adibiti alla cottura dialimenti |
NL1014044C2 (nl) * | 2000-01-10 | 2001-07-19 | Levens Group B V | Door gasbrander verwarmde oven. |
US6188045B1 (en) | 2000-04-03 | 2001-02-13 | Alto-Shaam, Inc. | Combination oven with three-stage water atomizer |
US6346750B1 (en) * | 2000-04-28 | 2002-02-12 | Micron Technology, Inc. | Resistance-reducing conductive adhesives for attachment of electronic components |
US6371104B1 (en) | 2000-07-21 | 2002-04-16 | Wayne/Scott Fetzer Company | Convection oven with gas burner |
US7017571B2 (en) * | 2003-06-18 | 2006-03-28 | Convotherm Elektrogeräte GmbH | Heat exchanger device |
IT1392974B1 (it) | 2009-02-17 | 2012-04-02 | Premark Feg Llc | Scambiatore di calore per un dispositivo di processamento di cibo e forno provvisto dello stesso |
JP6198089B2 (ja) * | 2013-06-07 | 2017-09-20 | イノエン インコーポレイテッド | 調理機器用熱交換器 |
USD762289S1 (en) * | 2014-07-15 | 2016-07-26 | Dometic Sweden Ab | Heat exchanger |
IT201600094910A1 (it) * | 2016-09-21 | 2018-03-21 | Steelform Srl | Scambiatore di calore per forni di cottura |
JP6860374B2 (ja) * | 2017-02-17 | 2021-04-14 | ホシザキ株式会社 | 加熱調理器 |
US20220186979A1 (en) * | 2020-12-14 | 2022-06-16 | Rheem Manufacturing Company | Heating systems with unhoused centrifugal fan and wraparound heat exchanger |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3605717A (en) * | 1969-11-10 | 1971-09-20 | Crown X Inc | Convection oven |
US4648377A (en) * | 1986-05-01 | 1987-03-10 | Hobart Corporation | Gas convection oven and heat exchanger therefor |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1841213U (de) * | 1961-09-07 | 1961-11-09 | Fernwaerme Karl Kempf G M B H | Aus einem rohrbogen bestehendes kompensationselement fuer erdverlegte rohrleitungen. |
US5165889A (en) * | 1989-05-19 | 1992-11-24 | Import-Export Research And Development, Inc. | Gas convection oven with heat exchanger and baffles |
US5060722A (en) * | 1990-11-06 | 1991-10-29 | American Standard, Inc. | Furnace heat exchanger |
IT1253697B (it) * | 1991-08-05 | 1995-08-22 | Zanussi Grandi Impianti Spa | Forno di cottura a gas a convezione forzata. |
US5309890A (en) * | 1993-07-30 | 1994-05-10 | Carrier Corporation | Dual-sided condensate trap for furnace |
US5664555A (en) * | 1995-09-01 | 1997-09-09 | Empire Comfort Systems, Inc. | Wall heater with improved heat exchanger |
-
1997
- 1997-11-24 EP EP97120541A patent/EP0856705B1/de not_active Expired - Lifetime
- 1997-11-24 AT AT97120541T patent/ATE213532T1/de not_active IP Right Cessation
-
1998
- 1998-01-29 JP JP10016794A patent/JP3021411B2/ja not_active Expired - Fee Related
- 1998-01-29 US US09/015,120 patent/US5915372A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3605717A (en) * | 1969-11-10 | 1971-09-20 | Crown X Inc | Convection oven |
US4648377A (en) * | 1986-05-01 | 1987-03-10 | Hobart Corporation | Gas convection oven and heat exchanger therefor |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0926447A1 (de) * | 1997-12-23 | 1999-06-30 | RATIONAL GmbH | Gargerät mit Wärmerückführung |
DE102004004393B3 (de) * | 2004-01-29 | 2005-05-25 | Rational Ag | Gargerät, Luftleitglied, Haltevorrichtung und Verfahren zum Reinigen eines Gargeräts |
FR2899317A1 (fr) * | 2006-04-03 | 2007-10-05 | Thirode Grandes Cuisines Poligny | Dispositif d'echangeur thermique de bruleur a gaz |
EP1843101A3 (de) * | 2006-04-03 | 2012-12-05 | Thirode Grandes Cuisines Poligny | Wärmetauschervorrichtung eines Gasbrenners |
DE202011005261U1 (de) | 2010-04-14 | 2011-10-27 | Jaroslav Klouda | Heißluftwärmetauscher für Gargeräte, beispielsweise Kombidämpfer, Back- und Grillgeräte |
DE102011017024A1 (de) | 2010-04-14 | 2012-01-12 | Jaroslav Klouda | Heißluftwärmetauscher für Gargeräte beispielsweise Kombidämpfer, Back- und Grillgeräte |
ITTO20100632A1 (it) * | 2010-07-21 | 2012-01-22 | Premark Feg Llc | Scambiatore di calore migliorato per un dispositivo di processamento di cibo e forno provvisto dello stesso |
WO2012012479A1 (en) * | 2010-07-21 | 2012-01-26 | Premark Feg L.L.C. | Food processing device with a heat exchanger |
US9372005B2 (en) | 2012-11-30 | 2016-06-21 | Alto-Shaam, Inc. | Heat exchanger for oven |
Also Published As
Publication number | Publication date |
---|---|
ATE213532T1 (de) | 2002-03-15 |
JP3021411B2 (ja) | 2000-03-15 |
US5915372A (en) | 1999-06-29 |
EP0856705B1 (de) | 2002-02-20 |
JPH10246438A (ja) | 1998-09-14 |
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