EP0695915A1 - Fan-assisted oven with improved air circulation - Google Patents
Fan-assisted oven with improved air circulation Download PDFInfo
- Publication number
- EP0695915A1 EP0695915A1 EP94112321A EP94112321A EP0695915A1 EP 0695915 A1 EP0695915 A1 EP 0695915A1 EP 94112321 A EP94112321 A EP 94112321A EP 94112321 A EP94112321 A EP 94112321A EP 0695915 A1 EP0695915 A1 EP 0695915A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- cooking chamber
- rear wall
- oven
- chamber
- 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- Withdrawn
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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
Definitions
- This utility model relates to a fan-assisted oven in accordance with the introduction to the independent claim.
- the rear wall of the cooking chamber is known to comprise, in addition to the central grille, one or more slots in its edges close to the other walls of said chamber (in particular the side walls). Air heated by the resistance element and forced by the fan penetrates through these slots into the cooking chamber and flows along its walls, to be then drawn towards the fan through the central grille.
- Other slots are also provided in the rear wall such as to also direct the hot air forced by the fan towards a central region of the cooking chamber.
- An object of the utility model is to provide a fan-assisted oven in which the drawbacks of known ovens are overcome.
- a particular object of the utility model is to provide a fan-assisted oven in which there is a better distribution of hot air within its cooking chamber so as to improve the preparation quality of the food and in particular of a plurality of food items positioned at different levels within the oven.
- a further object is to provide an oven of the stated type in which the food is not directly struck by the hot air flow, so preventing non-uniform preparation.
- a fan-assisted oven ie in which forced air circulation is created
- a cooking chamber 2 defined by side walls 3 and 4, a roof 5, a lower wall 6 and a rear wall 7, it being open frontally at 8.
- a usual movable door On this open side there is provided a usual movable door, not shown.
- usual guides 10 On the walls 3 and 4 there are positioned usual guides 10 for supporting known shelves and grids, not shown.
- a compartment 11 containing in known manner a usual fan 12 driven by its own electric motor 13 and arranged to generate said air circulation within the chamber 2, and a known electrical resistance element 14 arranged to heat the air moved by the fan.
- a grille portion formed as the central part of the wall 7.
- the slots 18 can be of identical dimensions (such as those to the right for example in Figure 3) or of different dimensions (such as those to the left for example in Figure 3). In this latter case, the slots 21 positioned at the geometrical corner 20 of the wall 7 and in its immediate vicinity are of greater dimensions than the remaining slots to facilitate the said air circulation (ie so that each air stream leaving the slots 18 follows substantially the edges 19 of the chamber 1).
- the utility model results in a better hot air distribution within the cooking chamber 2 (with considerable advantages in the preparation of the food and in particular of food items positioned simultaneously on different shelves within this chamber); in addition the air emitted by each corner slot 18 does not directly strike the food within the oven, so preventing different degrees of preparation (for example cooking) of different parts of one and the same food item.
- Figures 4 and 5 represent a modified embodiment of the oven of Figures 1 to 3.
- parts corresponding to those of the already described figures are indicated by the same reference numerals.
- the wall 7 comprises a flat portion (in which the grille portion 16 is formed), from the upper and lower parallel sides 71 and 72 of which there extend two bent parts 73 and 74 arranged to cooperate with a back panel 75 defining with the wall 7 the compartment 11 housing the fan 12.
- the parts 73 and 74 extend along only part of the sides 71 and 72 so that in conjunction with the side walls 3 and 4, the lower wall 6 and the roof 5, they define passages 77 positioned along the edges 19 of the cooking chamber 2.
- these passages are provided only along said sides 71 and 72 of the well 7, but can also be provided along the vertical sides 78 and 79 ( Figure 4) of this latter in proximity to the walls 3 and 4 of the chamber 2 (in other words they can embrace the corners 20 of the wall 7).
- the sides 78 and 79 are bent towards the back panel 75 of said chamber and rest against it.
- the corner passages provided in the wall 7 enable a forced air circulation to be achieved (arrows W of Figure 4) along said edges 19 of the chamber 2.
- FIG. 6 shows schematically the air circulation within the oven 1.
- the forced air fed into the chamber 2 via the corner entry regions penetrates within the chamber 2 along its edges and on striking the door is deflected (arrows P) towards the central region of this chamber and drawn (arrows T) into the compartment 11 via the grille portion 16 by the fan 11.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electric Stoves And Ranges (AREA)
Abstract
A fan-assisted oven (1) comprises a cooking chamber (2) with side walls (3, 4), a roof (5), a lower wall (6) and a rear wall (7), beyond this latter there being positioned a compartment (11) housing a known electrical resistance element (14) and a usual motorized fan (12), a grille portion (16) being provided centrally within the rear wall (7) in front of said fan (12); at its corners (17), said rear wall (7) comprises regions (18, 77) through which air forced by the fan (12) is introduced into the cooking chamber (2), said air moving along said walls in proximity to their edges (19) during its introduction into said chamber (2) and being directed mainly towards the front wall or opening door of the oven, to then undergo redistribution within the chamber (2) and be then drawn by the fan (12) through the central grille (16) into the compartment (11) where said fan is housed.
Description
- This utility model relates to a fan-assisted oven in accordance with the introduction to the independent claim.
- In fan-assisted ovens of the state of the art, the rear wall of the cooking chamber is known to comprise, in addition to the central grille, one or more slots in its edges close to the other walls of said chamber (in particular the side walls). Air heated by the resistance element and forced by the fan penetrates through these slots into the cooking chamber and flows along its walls, to be then drawn towards the fan through the central grille. Other slots are also provided in the rear wall such as to also direct the hot air forced by the fan towards a central region of the cooking chamber.
- This arrangement has the serious drawback that the exit air directly strikes the food contained in the oven and is not distributed uniformly within the cooking chamber. The food consequently has differently heated parts (with the parts close to the rear wall being hotter than the parts facing the usual closure door of the cooking chamber), this leading to various drawbacks such as a different degree of preparation (for example cooking) of different parts of the food and the need to move the food within the chamber so that different parts of it are made to face said rear wall. This latter requirement means that the oven door has to be opened with consequent entry into it of air at ambient temperature and a reduction in the internal temperature, with obvious drawbacks.
- An object of the utility model is to provide a fan-assisted oven in which the drawbacks of known ovens are overcome.
- A particular object of the utility model is to provide a fan-assisted oven in which there is a better distribution of hot air within its cooking chamber so as to improve the preparation quality of the food and in particular of a plurality of food items positioned at different levels within the oven.
- A further object is to provide an oven of the stated type in which the food is not directly struck by the hot air flow, so preventing non-uniform preparation.
- These and further objects which will be apparent to the expert of the art are attained by an oven in accordance with the accompanying claims.
- The present utility model will be more apparent from the accompanying drawing, which is provided by way of non-limiting example and in which:
- Figure 1 is a partial perspective view of the cooking chamber of an oven according to the invention;
- Figure 2 is a schematic section on the line 2-2 of Figure 1;
- Figure 3 is a front view of the rear wall of the cooking chamber of Figure 1;
- Figure 4 is a view similar to that of Figure 1 but showing a different embodiment of the oven according to the utility model;
- Figure 5 is a section on the line 5-5 of Figure 4; and
- Figure 6 shows schematically the forced air circulation within the cooking chamber of an oven in accordance with Figures 1 and 4.
- With reference to Figures 1 to 3, a fan-assisted oven (ie in which forced air circulation is created) is indicated overall by 1 and comprises a
cooking chamber 2 defined byside walls roof 5, alower wall 6 and arear wall 7, it being open frontally at 8. On this open side there is provided a usual movable door, not shown. On thewalls usual guides 10 for supporting known shelves and grids, not shown. - Beyond the rear wall 7 (with reference to the position of a user facing the oven) there is provided a
compartment 11 containing in known manner ausual fan 12 driven by its ownelectric motor 13 and arranged to generate said air circulation within thechamber 2, and a knownelectrical resistance element 14 arranged to heat the air moved by the fan. To the front of the fan (of tangential type) there is a grille portion, formed as the central part of thewall 7. - According to the utility model, in
corner regions 17 of thewall 7 there are provided one or more throughslots 18 connecting thecooking chamber 2 to thecompartment 11. These slots (which define corner grille portions) enable the air moved tangentially by thefan 12 to penetrate into said chamber at itsedges 19, and to flow along these latter. Each air stream on striking the door is made to return towards the central axis of the chamber (indicated by W in Figure 1) so that thefan 12 draws it into thecompartment 11 through the grille orgrille portion 16. - The
slots 18 can be of identical dimensions (such as those to the right for example in Figure 3) or of different dimensions (such as those to the left for example in Figure 3). In this latter case, theslots 21 positioned at thegeometrical corner 20 of thewall 7 and in its immediate vicinity are of greater dimensions than the remaining slots to facilitate the said air circulation (ie so that each air stream leaving theslots 18 follows substantially theedges 19 of the chamber 1). - The utility model results in a better hot air distribution within the cooking chamber 2 (with considerable advantages in the preparation of the food and in particular of food items positioned simultaneously on different shelves within this chamber); in addition the air emitted by each
corner slot 18 does not directly strike the food within the oven, so preventing different degrees of preparation (for example cooking) of different parts of one and the same food item. - Figures 4 and 5 represent a modified embodiment of the oven of Figures 1 to 3. In Figures 4 and 5, parts corresponding to those of the already described figures are indicated by the same reference numerals.
- In the oven under examination, the
wall 7 comprises a flat portion (in which thegrille portion 16 is formed), from the upper and lowerparallel sides bent parts back panel 75 defining with thewall 7 thecompartment 11 housing thefan 12. - The
parts sides side walls lower wall 6 and theroof 5, they definepassages 77 positioned along theedges 19 of thecooking chamber 2. In the example, these passages are provided only along saidsides well 7, but can also be provided along the vertical sides 78 and 79 (Figure 4) of this latter in proximity to thewalls corners 20 of the wall 7). - In the example, the
sides 78 and 79 are bent towards theback panel 75 of said chamber and rest against it. - As in the case of the oven of Figures 1 to 3, the corner passages provided in the
wall 7 enable a forced air circulation to be achieved (arrows W of Figure 4) alongsaid edges 19 of thechamber 2. - With reference to Figure 6 (in which parts corresponding to those of the already described figures are indicated by the same reference numerals), this shows schematically the air circulation within the
oven 1. As can be seen, the forced air fed into thechamber 2 via the corner entry regions (defined by theslots 18 and passages 77) penetrates within thechamber 2 along its edges and on striking the door is deflected (arrows P) towards the central region of this chamber and drawn (arrows T) into thecompartment 11 via thegrille portion 16 by thefan 11. This enables the aforesaid advantages stated in relation to Figures 1, 2 and 3 to be obtained. - Different preferred embodiments of the utility model have been described. Other embodiments are possible in the light of the present description (such as one in which for example the
slots 18 extend parallel to the edges of thecorner regions 17 of the wall 7) while remaining within the scope of the present document.
Claims (5)
- A fan-assisted oven comprising a cooking chamber with side walls, a roof, a lower wail and a rear wall, beyond this latter there being positioned a compartment (11) housing a known electrical resistance element and a usual motorized fan, a grille portion being provided centrally within the rear wall in front of said fan, characterised in that at its corner portions (17), said rear wall (7) comprises regions (18, 77) through which air forced by the fan (12) is introduced into the cooking chamber (2), said air moving along said walls in proximity to their edges (19) during its introduction into said chamber and being then drawn by the fan (12) through the central grille (16) into the compartment (11) where said fan is housed.
- A fan-assisted oven as claimed in claim 1, characterised in that the regions in which air is introduced into the cooking chamber (2) comprise at least one slot (18) positioned at the geometrical corners (20) of the rear wall (7).
- A fan-assisted oven as claimed in claim 2, characterised in that the slots (18) defining the air introduction regions comprise slots (21) of different dimensions.
- A fan-assisted oven as claimed in claim 1, characterised in that the regions in which air is introduced into the cooking chamber (2) are passages (77) provided along sides (73, 74) of the rear wall (7).
- A fan-assisted oven as claimed in claim 4, characterised in that the passages (77) are defined between bent parts (73, 74) of the wall (7) which connect this latter to a back panel (75) of the cooking chamber (2), and the adjacent parts (3, 4, 5, 6) of the cooking chamber itself.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94112321A EP0695915A1 (en) | 1994-08-06 | 1994-08-06 | Fan-assisted oven with improved air circulation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94112321A EP0695915A1 (en) | 1994-08-06 | 1994-08-06 | Fan-assisted oven with improved air circulation |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0695915A1 true EP0695915A1 (en) | 1996-02-07 |
Family
ID=8216181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94112321A Withdrawn EP0695915A1 (en) | 1994-08-06 | 1994-08-06 | Fan-assisted oven with improved air circulation |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0695915A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006025133A1 (en) * | 2004-08-31 | 2006-03-09 | Sharp Kabushiki Kaisha | Heating cooking apparatus |
EP2012066A1 (en) | 2007-07-03 | 2009-01-07 | BSH Bosch und Siemens Hausgeräte GmbH | Household appliance, in particular fermenting device |
CN108386387A (en) * | 2018-03-05 | 2018-08-10 | 杭州老板电器股份有限公司 | The uniform wind turbine cover plate assembly of household electrical appliance dynamic and household electrical appliance |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58160744A (en) * | 1982-03-17 | 1983-09-24 | Matsushita Electric Ind Co Ltd | Hot air circulating type oven |
EP0105931A1 (en) * | 1982-04-14 | 1984-04-25 | Matsushita Electric Industrial Co., Ltd. | Hot air circulation type cooking device |
-
1994
- 1994-08-06 EP EP94112321A patent/EP0695915A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58160744A (en) * | 1982-03-17 | 1983-09-24 | Matsushita Electric Ind Co Ltd | Hot air circulating type oven |
EP0105931A1 (en) * | 1982-04-14 | 1984-04-25 | Matsushita Electric Industrial Co., Ltd. | Hot air circulation type cooking device |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 7, no. 287 (M - 264)<1432> 21 December 1983 (1983-12-21) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006025133A1 (en) * | 2004-08-31 | 2006-03-09 | Sharp Kabushiki Kaisha | Heating cooking apparatus |
EP2012066A1 (en) | 2007-07-03 | 2009-01-07 | BSH Bosch und Siemens Hausgeräte GmbH | Household appliance, in particular fermenting device |
CN108386387A (en) * | 2018-03-05 | 2018-08-10 | 杭州老板电器股份有限公司 | The uniform wind turbine cover plate assembly of household electrical appliance dynamic and household electrical appliance |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB |
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17P | Request for examination filed |
Effective date: 19960727 |
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17Q | First examination report despatched |
Effective date: 19971112 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19990204 |