EP4033152A1 - Kochgerät mit verbesserter abzugsleistung - Google Patents

Kochgerät mit verbesserter abzugsleistung Download PDF

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Publication number
EP4033152A1
EP4033152A1 EP22152964.7A EP22152964A EP4033152A1 EP 4033152 A1 EP4033152 A1 EP 4033152A1 EP 22152964 A EP22152964 A EP 22152964A EP 4033152 A1 EP4033152 A1 EP 4033152A1
Authority
EP
European Patent Office
Prior art keywords
section
cross
inlet
burner
cooking appliance
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
Application number
EP22152964.7A
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English (en)
French (fr)
Other versions
EP4033152B1 (de
Inventor
Serkan CIGAL
Serkan Emre Erfidan
Sezer Isbilen
Ahmet Ilyas Kodal
Efe Can Yilmaz
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.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP4033152A1 publication Critical patent/EP4033152A1/de
Application granted granted Critical
Publication of EP4033152B1 publication Critical patent/EP4033152B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/04—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate
    • F24C3/047—Ranges
    • 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
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • 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
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges
    • F24C3/087—Arrangement or mounting of burners on ranges in baking ovens

Definitions

  • the present invention relates to a cooking appliance with an improved exhaust system for providing effective burning process and for reducing the pollutant emission according to preamble of claim 1.
  • the present invention provides a cooking appliance which is able to increase exhausting performance and to raise gas combustion efficiency so as to achieve high energy output in an easy, economic and convenient manner.
  • the present invention proposes a cooking appliance having a cooking cavity defining within a top wall, a bottom wall, a rear wall, and opposing side walls comprising, an oven burner having a cylindrical casing and at least one wing unit radiating heat downwardly, an exhaust channel having an inlet which is in fluid communication with an interior of the cooking cavity and an outlet which is in fluid communication with an exterior of the cooking appliance wherein the exhaust channel is configured to allow fresh air to enter the cooking cavity and to allow exhaust gases to vent therefrom. Additionally, the inlet is disposed on the top wall and arranged to be aligned above the oven burner to provide an airflow region provided between the wing units and the top wall of the cooking cavity. Hence, a cooking appliance and an exhaust channel of the same which maintains the desired air/fuel ratio and enhances combustion efficiency are provided.
  • the inlet is arranged concentrically with the oven burner.
  • the inlet is configured to be enclosed in a centred manner in the orthogonal projection of the burner on a plane containing the inlet. The orientation of the inlet provides a swirl flow of exhaust gases thereby achieving an efficient combustion process and reduced emissions.
  • the center of the cross section of the inlet is arranged over the middle portion bisecting or nearly bisecting the width of the burner.
  • Said orientation of the inlet enables the exhaust gases to follow an exhaust gas path formed by the exhaust channel.
  • the center of cross section of the inlet is arranged over the middle portion bisecting or nearly bisecting of the length of the burner. Hence, the waste gas and/or exhaust gas produced in the burning process is removed therefrom to retain the combustion process.
  • the inlet has a cross sectional area which is sized to be less than a predetermined value which corresponds to the sum of a first cross section area of the airflow region, a second cross section area of the airflow region, twenty percent of a third cross section area of the airflow region and twenty percent of the fourth cross section area of the airflow region.
  • the first cross section area is the cross section of the airflow region at the lateral left side of a left wing unit
  • the second cross section area is the vertical cross section of the airflow region at the lateral right side of a right wing unit
  • the third cross section area is the vertical cross section of the airflow region which faces the rear wall of the cooking cavity and taken parallel to thereto
  • the fourth cross section area is the vertical cross section of a front side of the airflow region wherein said front side is a distal side to the rear wall of the cooking cavity.
  • At least one edge each of the first cross section and the second cross section of the airflow region is formed by a longitudinal axis of the burner, and at least one edge each of the third cross section and the fourth cross section of the airflow region is formed by a transverse axis of the burner. Since the size of the cross sectional area of the inlet affects the flow rate of the waste gas, the fact that the cross sectional area is lower than said predetermined value prevents the heat needed for the heating of the cooking cavity from being transferred to the exterior of the cooking appliance.
  • the airflow region in which the waste gas generated as a consequence of combustion accumulates is taken into account and hence the airflow region is sized and shaped to minimize emission and ensure adequate combustion efficiency. Alteration of the dimensions of the oven burner, therefore, leads to a change in the pollutant emissions generated from fuel combustion and energy efficiency of the cooking appliance.
  • the inlet has a predetermined cross sectional area wherein said area is sized to be larger than a predetermined value depending on a power of the oven burner, a burner coefficient and a safety factor of the oven burner.
  • the cross section of the inlet is formed in a substantially rectangular shape with its minor dimension ranging from 10 % to 80 %, optionally 15 % to 35 %, of its major dimension.
  • cross section of the inlet is sized with a tolerance circle, accordingly, advancement in burning efficiency and reduction in emission are provided.
  • said cross section of the inlet has a dimension of 20 mm x 70 mm, thereby ensuring that the temperature of a door surface of a cooking appliance remains within the standard limits without using a further ventilation system. If the dimensions of the inlet are not sufficiently large, exhaust performance would decrease and an effective combustion process canot be obtained due to the insufficient (???) fresh air.
  • the inlet has a cross sectional area in a range of from 1365 mm 2 to 1472 mm 2 .
  • Said cross section is therefore sized in such a way that the pollutant emission is minimized and the heat generated by the oven burner is effectively distributed in the cooking cavity.
  • the exhaust channel is formed in substantially Z-shaped in accordance with a possible embodiment of the invention.
  • Various connection means such as plug and screws, may be used for associating the exhaust channel with a cooktop and cooking cavity of the cooking appliance.
  • the cooking appliance is an oven, a grill or a gas cooker.
  • the present invention relates to a cooking appliance (100), as illustrated in Fig. 1 , with an improved exhaust channel (30) conformation for providing an effective cooking performance in a more safe and cost-effective way.
  • said cooking appliance (100) generally comprises a cooktop (90) and an aperture (91) associated with an outlet (32) of an exhaust channel (30).
  • said cooking appliance (100) having a cooking cavity (10) defined within a top wall (11), a bottom wall (12), a rear wall (13), an inlet housing (15) and opposing sidewalls (14) comprises the exhaust channel (30) having an inlet (31) which is in fluid communication with an interior of the cooking cavity (10) and the outlet (32) which is in fluid communication with an exterior of the cooking appliance (100) wherein the exhaust channel (30) is configured to allow fresh air to enter into the cooking cavity (10) and to allow exhaust gases to vent therefrom.
  • the exhaust channel (30) further comprises an air duct (33) having a first piece (34) and a second piece (35).
  • the object of the invention is to eliminate the unnecessary cost in the manufacturing process and to provide a user-friendly design
  • various connection means like plugs and screws can be chosen to provide a connection between the exhaust channel (30) and the cooking appliance (100).
  • the exhaust channel (30) is formed of a substantially Z-shaped geometry, the uncomplicated, cost-effective manufacture and assembly thereof are provided by means of the basic design of the exhaust channel (30).
  • Fig. 10 to Fig. 12 illustrates a burner (20) comprising a cylindrical casing (21) and at least one wing unit (22) radiating heat within said cooking cavity (10). Furthermore said cylindrical casing (21) has a plurality of flame ports extending through a top portion thereof. Said wing unit (22) extends outwardly from said cylindrical casing (21) wherein said wing unit (22) is configured to direct and to distribute the heated air the underside of thereof. Moreover said wing unit further comprises a right wing unit (221) and a left wing unit (222).
  • the inlet (31) which is disposed on the top wall (11) is arranged to be aligned above the burner (20) to provide an airflow region (50) arranged between the wing units (22) and the top wall (11) of the cooking cavity (10).
  • Fig. 10 to Fig. 12 illustrate the burner (20) comprising the cylindrical casing (21) and at least one wing unit (22) radiating heat within the said cooking cavity (10). Furthermore said cylindrical casing (21) has a plurality of flame ports extending through a top portion thereof. Said wing unit (22) extends outwardly from said cylindrical casing (21) wherein said wing unit (22) is configured to direct and distribute the heated air downwards.
  • the inlet (31) is positioned over a middle portion (23) of the burner (20).
  • the inlet (31) is positioned such that the inlet (31) is enclosed in an orthogonal projection of the burner (27) on a plane containing the inlet (31) as again depicted in Fig. 9 .
  • said cross section (312) of the inlet (31) has a width (W3) of 20 mm and a length (L3) of 70 mm.
  • FIG. 18 A schematic view representing the orthogonal projection of the burner (27) on a plane containing the inlet (31) is illustrated in Fig. 18 wherein the inlet (31) is configured to be enclosed in a centered manner in the orthogonal projection of the burner (27) on a plane containing the inlet (31).
  • the center (311) of the cross section (312) of the inlet (31) is arranged over the middle portion (23) bisecting or nearly bisecting the width of the burner (20).
  • the center (311) of the cross section (312) of the inlet (31) is arranged over the middle portion (23) bisecting or nearly bisecting the length of the burner (20).
  • a first distance (D1) between the center (311) of the orthogonal projection (313) of the inlet (31) and a longitudinal edge of the burner (L1) corresponds to half the width of the burner (20).
  • the first distance (D1) between the center (311) of the orthogonal projection (313) of the inlet (31) and the longitudinal edge of the burner (L1) corresponds to slightly less than half the width of the burner (20). In a possible embodiment, the first distance (D1) between the center (311) of the orthogonal projection (313) of the inlet (31) and the longitudinal edge of the burner (L1) corresponds to slightly more than half the width of the burner (20).
  • a second distance (D2) between the center (311) of the orthogonal projection (313) of the inlet (31) and a transverse edge of the burner (W1) corresponds to the half-length of the burner (20).
  • said second distance (D2) corresponds to slightly less than the half-length (L1) of the burner (20).
  • said second distance (D2) corresponds to slightly more than the half-length of the burner (20).
  • said middle portion (23) in accordance with an exemplary embodiment comprises an intersection of second parts which are obtained in a situation where both a length in a longitudinal axis (25) and a width in a transverse axis (26) of the burner (20) are divided into three equal parts.
  • Fig. 13 and Fig. 14 illustrate the airflow region (50) arranged between the burner (20) and the top wall (11) wherein said airflow region (50) has a shape in the form of a pentagonal prism, or a rectangular pentagonal prism, or rectangular prism shape, or polygon prism.
  • the airflow region shown in Fig. 15 comprises a first cross section (51) and a second cross section (52) constituting a rectangular conformation whose at least one edge is formed by the longitudinal axis (25) and/or longitudinal edge of the burner (L1) and/or the wing unit (22), and a third cross section (53) and a fourth cross section (53) constituting a pentagon conformation whose at least one edge is formed by the transverse axis (26) and/or a transverse edge of the burner (W1).
  • the burner (20) employed in the cooking appliance (100) had a width (i.e. a transverse edge (W1)) of 156 mm and a length (i.e. a longitudinal edge (L1)) of 240 mm. It has been discovered through experiments that the width and the length of the burner (20) are decisive when determining the ideal position of the airflow region (50) as mentioned above. According to the results obtained from a computer-based experimental run, the inlet (31) was positioned at the location where the waste gas formed is concentrated. The first distance (D1) between the center (311) of the orthogonal projection (313) of the inlet (31) and the longitudinal edge of the burner (L1) is calculated as 78 mm.
  • the second distance (D2) between the center (311) of the orthogonal projection (313) of the inlet (31) and the transverse edge of the burner (W1) is calculated as 120mm.
  • First formula (I) is used to calculate the lowest cross sectional area "A" of the inlet (31) so as to remove exhaust gasses from the cooking cavity (10) and to provide effective exhaustion performance without using a ventilation system or a requirement to keep the door open.
  • the power of burner (20) employed in the exemplary embodiment is denoted by "P”
  • the burner (20) coefficient is denoted by “E”
  • the safety coefficient is denoted by "F”
  • the power of burner (20) employed in the working example is 2,1 Kw, the burner (20) coefficient is 0,5 and the safety coefficient is 1,3.
  • the inlet (31) is configured to have a cross sectional area to be greater than 1365 mm 2 .
  • a second formulation (II), a third formulation (III), a fourth formulation (IV), fifth formulation (V) and a sixth formulation (VI) have been developed as a result of analytical and modelling studies for ensuring energy efficiency of the cooking appliance (100).
  • area "S1" of the first cross section (51) and the area “ S2" of the second cross section (52) of the airflow region (50) are equal to 1920 mm 2 .
  • the area "S3" of the third cross section (53) and the area “ S4" of the fourth cross section (54) of the airflow region (50) are equal to 2156 mm 2 wherein "S1", “S2", “S3” and “S4" are calculated based on the dimensions of the burner (20) and the distance between the top wall (11) and the plane containing the burner (20).
  • the inlet (31) is configured to have a cross sectional area to be less than 4271 mm 2 .
  • burners (20) employed in the exemplary embodiments have various parameters such as power of the burner (20) varying in between 1.5 kW and 3.5 kW, the burner (20) coefficient varying in between 0.5 and 1, and safety coefficient varying in between 1 and 2.
  • the first cross section area "S1" and the second cross section area “S2" of the airflow region (50) were determined between 1200 mm 2 and 2520 mm 2
  • the third cross section area "S3" and the fourth cross section area "S4" were determined in between 1540 mm 2 and 2460 mm 2 .
  • FIG. 20 illustrates a few results derived from the experiments wherein the relationship between the cross sectional area of the inlet (31) and the amount of carbon monoxide (CO) is depicted.
  • G30 represents Butane gas
  • G20 represents Methane gas
  • G21 represents a gas mixture comprising 13 % Propane gas in Methane gas
  • H represents higher Wobbe Index range
  • L represents lower Wobbe Index range.
  • the line with the triangle marker represents an arrangement that includes the inlet (31) where the cross sectional area is equal to 1260 mm 2
  • the line with the circle marker represents an arrangement that includes the inlet (31) where the cross sectional area is equal to 1400 mm 2 .
  • the amount of carbon monoxide formed during the combustion process of an oven with a larger cross sectional area (i.e.1400 mm 2 ) is significantly lower than the oven with a narrower cross sectional area (i.e.1260 mm 2 ).
  • the cross sectional area is greater and, hence, the combustion process takes place with a more uniform air mixture.
  • the cooking appliance (100) is not limited to the possible applications and working examples described above. Embodiments of the present disclosure solve one or more of the foregoing or other problems in the art with improved systems for effective exhaustion performance without using a ventilation system or a requirement to keep the door open.
EP22152964.7A 2021-01-26 2022-01-24 Kochgerät mit verbesserter abzugsleistung Active EP4033152B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR2021/01108A TR202101108A1 (tr) 2021-01-26 2021-01-26 Geli̇şmi̇ş dişa atim performansina sahi̇p bi̇r pi̇şi̇ri̇ci̇ ci̇haz

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EP4033152A1 true EP4033152A1 (de) 2022-07-27
EP4033152B1 EP4033152B1 (de) 2023-12-20

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EP22152964.7A Active EP4033152B1 (de) 2021-01-26 2022-01-24 Kochgerät mit verbesserter abzugsleistung

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TR (1) TR202101108A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE840587C (de) * 1951-02-28 1952-06-03 Alfred Neff Dr Gasbeheizter Grill
US3659579A (en) * 1970-12-23 1972-05-02 Gen Electric Combined baking and broiling gas oven
JPS5226685U (de) * 1975-08-15 1977-02-24
JPS5554804U (de) * 1978-10-09 1980-04-14
ES2340901A1 (es) * 2008-05-26 2010-06-10 Fagor, S.Coop. Horno de gas con un quemador de doble modo.
US20140290642A1 (en) * 2013-03-26 2014-10-02 Electrolux Home Products, Inc. Oven broil burner

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014224116A1 (de) * 2014-11-26 2015-12-03 E.G.O. Elektro-Gerätebau GmbH Kochfeld
DE102019203114A1 (de) * 2019-03-07 2020-09-10 BSH Hausgeräte GmbH Haushaltskältegerät mit einer Anzeige- und/oder Bedieneinheit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE840587C (de) * 1951-02-28 1952-06-03 Alfred Neff Dr Gasbeheizter Grill
US3659579A (en) * 1970-12-23 1972-05-02 Gen Electric Combined baking and broiling gas oven
JPS5226685U (de) * 1975-08-15 1977-02-24
JPS5554804U (de) * 1978-10-09 1980-04-14
ES2340901A1 (es) * 2008-05-26 2010-06-10 Fagor, S.Coop. Horno de gas con un quemador de doble modo.
US20140290642A1 (en) * 2013-03-26 2014-10-02 Electrolux Home Products, Inc. Oven broil burner

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Publication number Publication date
EP4033152B1 (de) 2023-12-20
TR202101108A1 (tr) 2022-08-22

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