EP3167228A1 - A cooker comprising a burner - Google Patents

A cooker comprising a burner

Info

Publication number
EP3167228A1
EP3167228A1 EP15723239.8A EP15723239A EP3167228A1 EP 3167228 A1 EP3167228 A1 EP 3167228A1 EP 15723239 A EP15723239 A EP 15723239A EP 3167228 A1 EP3167228 A1 EP 3167228A1
Authority
EP
European Patent Office
Prior art keywords
burner
air
venturi
cooker
cap
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
EP15723239.8A
Other languages
German (de)
French (fr)
Other versions
EP3167228B1 (en
Inventor
Murat Kantas
Bedii ÖZDEMIR
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP3167228A1 publication Critical patent/EP3167228A1/en
Application granted granted Critical
Publication of EP3167228B1 publication Critical patent/EP3167228B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/06—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head

Definitions

  • the present invention relates to a cooker comprising gas burners.
  • the aim of the present invention is the realization of a cooker wherein the burner efficiency is increased.
  • the cooker realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a burner plate; a nozzle that provides gas injection from under the burner plate; a burner head seated on the burner plate;, more than one air inlet arranged between the burner plate and the burner head; a burner cap seated on the burner head; more than one outlet arranged between the burner head and the burner cap; a Venturi channel disposed on the burner head and extending vertically between the nozzle and the burner cap; a flow path extending from the air inlets to the outlets and a Venturi throat that is arranged on the Venturi channel and that forms a smaller cross-sectional area than the area of the peripheral air – gas outlet between the Venturi channel and the burner cap.
  • the Venturi throat the air that mixes with gas is enabled to slow down after the Venturi channel and prevented from creating eddy currents by impacting the burner cap rigorously.
  • the Venturi throat is positioned so as to be close to the burner cap, at a level higher than half the height of the Venturi channel.
  • the efficiency of the Venturi throat is increased by placing the Venturi throat, that is used in narrowing the Venturi channel that is desired to have a smaller cross-section than the peripheral air – gas outlet area between the burner cap and the Venturi channel, close to the burner cap where eddies are formed.
  • the area with the narrowest cross-section on the flow path is obtained by means of the Venturi throat.
  • the region with the highest flow speed is enabled to be the Venturi channel and the power of the Venturi effect is increased and more fresh air intake is provided.
  • the Venturi throat has an elliptical cross-section.
  • sharp geometric changes are prevented in the flow path and thus the reaction forces encountered by the air flow are lowered. Formation of eddy currents is prevented since the impacts of air – gas flow at the geometry changes are soft.
  • the burner is enabled to operate consistently without compromising efficiency by means of the Venturi throat formed by changing the geometry of the Venturi channel.
  • the Venturi effect is increased and the impact reactions are decreased by slowing down the gas speed in other regions on the flow path, and eddy currents are prevented.
  • Figure 1 – is the perspective view of a cooker.
  • Figure 2 – is the exploded view of a burner.
  • Figure 3 – is the cross-sectional view of a burner.
  • Figure 4 – is the perspective cross-sectional view of a burner.
  • Figure 5 — is the view of detail A in Figure 4.
  • d1 The diameter of the narrowest portion of the Venturi throat that is vertical to the air flow
  • the cooker (1) comprises a burner (2) that has a burner plate (3); a nozzle (4) that provides injection of gas from the lower side of the burner plate (3); a burner head (5) seated on the burner plate (3); more than one air inlet (7) arranged between the burner plate (3) and the burner head (5) and that provides air intake; a burner cap (8) seated on the burner head (5); more than one outlet (9) arranged between the burner head (5) and the burner cap (8) and a Venturi channel (6) that is arranged at the center of the burner head (5), that extends in the vertical direction from the nozzle (4) towards the burner cap (8), that enables air to be sucked from the air inlets (7) by creating negative pressure and that forms a flow path for the air – gas mixture entering from the air inlet (7) and the nozzle (4) and exiting from the outlets (9).
  • the gas is injected into the Venturi channel (6) by the nozzle (4). Air is sucked into the Venturi channel (6) through the air inlets (7) by the low pressure created with the injected gas. In the Venturi channel (6), the air and gas that rise vertically mix with each other. The air – gas mixture impacts the burner cap (8) at the end of the Venturi channel (6), disperses horizontally in the area between the burner cap (8) and the burner head (5) and is guided towards the outlets (9). The air – gas mixture exiting from the outlets (9) is ignited by means of the igniter (not shown in the figures).
  • the cross-section of the volume between the burner cap (8) and the burner head (5) is kept smaller than the cross-section of the outlets (9) so that burning can be realized in a controlled manner.
  • the speed of the air – gas mixture is decreased and the size of the flames can be kept small.
  • the cooker (1) of the present invention comprises a Venturi throat (10) that is arranged on the Venturi channel (6) and that has a smaller Venturi channel cross-sectional area (B) than the peripheral air – gas outlet area (C) remaining between the burner cap (8) and the Venturi channel (6).
  • the diameter of the Venturi throat (10) that is vertical to the air flow is d 1.
  • the height of the peripheral air – gas outlet area (C) between the highest point of the Venturi channel (6) and the burner cap (8) is h and the diameter of the circle in this area, that is the diameter of the peripheral air – gas outlet area is d 2.
  • the air – gas mixture is enabled to slow down while leaving the Venturi channel (6) and the mixture impacting the burner cap (8) is enabled to disperse controllably and horizontally in the volume between the burner cap (8) and the burner head (5) without forming eddy currents.
  • the air – gas mixture leaves the Venturi channel (6) by slowing down; the effect of impacting the burner cap (8) is weakened.
  • the Venturi throat (10) is positioned at the upper half of the Venturi channel (6) in the portion close to the burner cap (8).
  • the turbulence is mostly realized at the upper half of the Venturi channel (6) in the portion close to the burner cap (8).
  • the Venturi throat (10) provides an area with the narrowest cross-section on the flow path.
  • the area with the narrowest cross-section on the flow path is taken inside the Venturi channel (6).
  • the flow path starts to widen onwards from the Venturi channel (6) and the speed of the fluid is prevented from accelerating and decelerating in sequence, hence the eddy currents that may occur along the flow path are avoided.
  • the low pressure formed behind the gas in the Venturi channel (6) is decreased and vacuum effect is increased hence the amount of air sucked from the air inlets (7) is increased and efficiency is increased by minimizing formation of carbon monoxide.
  • the cross-section of the Venturi throat (10) in the flow direction of the air – gas mixture is elliptical.
  • the flow is enabled to be controllable by softening the changes of the cross-sectional areas. As there are no sharp area changes on the flow path, the reaction that air encounters is decreased and formation of eddy currents is prevented.
  • the Venturi channel (6) cross-sectional area (B) is kept smaller than the peripheral air – gas outlet area (C) by means of the Venturi throat (10), formation of eddy currents is prevented and the burner (2) is enabled to operate consistently and efficiently at the same time. Furthermore, the vacuum effect in the Venturi channel (6) is increased thereby providing a greater amount of fresh air intake and the carbon monoxide and/or carbon dioxide emission is minimized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Abstract

The present invention relates to a cooker (1) comprising a burner (2) that has a burner plate (3); a nozzle (4) that provides injection of gas from the lower side of the burner plate (3); a burner head (5) seated on the burner plate (3); more than one air inlet (7) arranged between the burner plate (3) and the burner head (5) and that provides air intake; a burner cap (8) seated on the burner head (5); more than one outlet (9) arranged between the burner head (5) and the burner cap (8) and a Venturi channel (6) that is arranged at the center of the burner head (5), that extends in the vertical direction from the nozzle (4) towards the burner cap (8), that enables air to be sucked from the air inlets (7) by creating negative pressure and that forms a flow path for the air - gas mixture entering from the air inlet (7) and the nozzle (4) and exiting from the outlets (9).

Description

    A COOKER COMPRISING A BURNER
  • The present invention relates to a cooker comprising gas burners.
  • Different burners are designed so that the burners in the cookers can operate more consistently. However, while uniformity of flames is provided the industry standards also have to be complied with. In the case of complying with the industry standards having criteria like increasing efficiency and decreasing carbon monoxide emission, there can be irregularities in the operation of the burner. In order to decrease carbon monoxide emission, fresh air intake have to be maximized, however when air intake is increased, turbulences in the air flow become inevitable. The eddy currents that form originating from the geometry of the burner cause the flames to be inconsistent. Besides, the eddy currents created in the Venturi channel cause decrease in air intake and in efficiency and increase in carbon monoxide and/or carbon dioxide emission.
  • In the state of the art United States Patent Application No. US8381714, a burner is disclosed having a geometry that eliminates turbulent flow eddies.
  • In the state of the art United States Patent Application No. US5133334 a burner is disclosed having an hourglass-shaped Venturi channel.
  • The aim of the present invention is the realization of a cooker wherein the burner efficiency is increased.
  • The cooker realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a burner plate; a nozzle that provides gas injection from under the burner plate; a burner head seated on the burner plate;, more than one air inlet arranged between the burner plate and the burner head; a burner cap seated on the burner head; more than one outlet arranged between the burner head and the burner cap; a Venturi channel disposed on the burner head and extending vertically between the nozzle and the burner cap; a flow path extending from the air inlets to the outlets and a Venturi throat that is arranged on the Venturi channel and that forms a smaller cross-sectional area than the area of the peripheral air – gas outlet between the Venturi channel and the burner cap. By means of the Venturi throat, the air that mixes with gas is enabled to slow down after the Venturi channel and prevented from creating eddy currents by impacting the burner cap rigorously.
  • In an embodiment of the present invention, the Venturi throat is positioned so as to be close to the burner cap, at a level higher than half the height of the Venturi channel. The efficiency of the Venturi throat is increased by placing the Venturi throat, that is used in narrowing the Venturi channel that is desired to have a smaller cross-section than the peripheral air – gas outlet area between the burner cap and the Venturi channel, close to the burner cap where eddies are formed.
  • In an embodiment of the present invention, the area with the narrowest cross-section on the flow path is obtained by means of the Venturi throat. In this embodiment, the region with the highest flow speed is enabled to be the Venturi channel and the power of the Venturi effect is increased and more fresh air intake is provided.
  • In an embodiment of the present invention, the Venturi throat has an elliptical cross-section. In this embodiment, sharp geometric changes are prevented in the flow path and thus the reaction forces encountered by the air flow are lowered. Formation of eddy currents is prevented since the impacts of air – gas flow at the geometry changes are soft.
  • In the cooker of the present invention, the burner is enabled to operate consistently without compromising efficiency by means of the Venturi throat formed by changing the geometry of the Venturi channel. By increasing the speed of gas flow in the Venturi channel, the Venturi effect is increased and the impact reactions are decreased by slowing down the gas speed in other regions on the flow path, and eddy currents are prevented.
  • The model embodiments relating to the cooker realized in order to attain the aim of the present invention are illustrated in the attached figures, where:
  • Figure 1 – is the perspective view of a cooker.
  • Figure 2 – is the exploded view of a burner.
  • Figure 3 – is the cross-sectional view of a burner.
  • Figure 4 – is the perspective cross-sectional view of a burner.
  • Figure 5 – is the view of detail A in Figure 4.
  • The elements illustrated in the figures are numbered as follows:
  • 1. Cooker
  • 2. Burner
  • 3. Burner plate
  • 4. Nozzle
  • 5. Burner head
  • 6. Venturi channel
  • 7. Air inlet
  • 8. Burner cap
  • 9. Outlet
  • 10. Venturi throat
  • Furthermore, the following statements are used so that the present invention is understood better:
  • d1: The diameter of the narrowest portion of the Venturi throat that is vertical to the air flow
  • d2 : Diameter of the peripheral air – gas outlet area
  • h: Height of the peripheral air – gas outlet area
  • B : Cross-sectional area of the Venturi channel
  • C : Peripheral air – gas outlet area
  • The cooker (1) comprises a burner (2) that has a burner plate (3); a nozzle (4) that provides injection of gas from the lower side of the burner plate (3); a burner head (5) seated on the burner plate (3); more than one air inlet (7) arranged between the burner plate (3) and the burner head (5) and that provides air intake; a burner cap (8) seated on the burner head (5); more than one outlet (9) arranged between the burner head (5) and the burner cap (8) and a Venturi channel (6) that is arranged at the center of the burner head (5), that extends in the vertical direction from the nozzle (4) towards the burner cap (8), that enables air to be sucked from the air inlets (7) by creating negative pressure and that forms a flow path for the air – gas mixture entering from the air inlet (7) and the nozzle (4) and exiting from the outlets (9).
  • In the cooker (1), the gas is injected into the Venturi channel (6) by the nozzle (4). Air is sucked into the Venturi channel (6) through the air inlets (7) by the low pressure created with the injected gas. In the Venturi channel (6), the air and gas that rise vertically mix with each other. The air – gas mixture impacts the burner cap (8) at the end of the Venturi channel (6), disperses horizontally in the area between the burner cap (8) and the burner head (5) and is guided towards the outlets (9). The air – gas mixture exiting from the outlets (9) is ignited by means of the igniter (not shown in the figures). The cross-section of the volume between the burner cap (8) and the burner head (5) is kept smaller than the cross-section of the outlets (9) so that burning can be realized in a controlled manner. Thus, the speed of the air – gas mixture is decreased and the size of the flames can be kept small.
  • The cooker (1) of the present invention comprises a Venturi throat (10) that is arranged on the Venturi channel (6) and that has a smaller Venturi channel cross-sectional area (B) than the peripheral air – gas outlet area (C) remaining between the burner cap (8) and the Venturi channel (6).
  • In the cooker (1) of the present invention, the diameter of the Venturi throat (10) that is vertical to the air flow is d1. The height of the peripheral air – gas outlet area (C) between the highest point of the Venturi channel (6) and the burner cap (8) is h and the diameter of the circle in this area, that is the diameter of the peripheral air – gas outlet area is d2.
  • B = π*d1 2/4
  • C= π*d2*h
  • By keeping the Venturi channel cross-sectional area (B) smaller than the peripheral air – gas outlet area (C) between the Venturi channel (6) and the burner cap (8) by means of the Venturi throat (10), the air – gas mixture is enabled to slow down while leaving the Venturi channel (6) and the mixture impacting the burner cap (8) is enabled to disperse controllably and horizontally in the volume between the burner cap (8) and the burner head (5) without forming eddy currents. As the air – gas mixture leaves the Venturi channel (6) by slowing down; the effect of impacting the burner cap (8) is weakened.
  • In an embodiment of the present invention, the Venturi throat (10) is positioned at the upper half of the Venturi channel (6) in the portion close to the burner cap (8). In a Venturi channel (6) with fixed cross-section, the turbulence is mostly realized at the upper half of the Venturi channel (6) in the portion close to the burner cap (8). By placing the Venturi throat (10) at the region where eddy currents are created, the efficacy of the Venturi throat (10) is increased. By this embodiment, the eddy currents on the flow path are prevented and efficiency is increased.
  • In an embodiment of the present invention, the Venturi throat (10) provides an area with the narrowest cross-section on the flow path. Thus, the area with the narrowest cross-section on the flow path is taken inside the Venturi channel (6). Thus, the flow path starts to widen onwards from the Venturi channel (6) and the speed of the fluid is prevented from accelerating and decelerating in sequence, hence the eddy currents that may occur along the flow path are avoided. Furthermore, as the eddy currents are avoided, the low pressure formed behind the gas in the Venturi channel (6) is decreased and vacuum effect is increased hence the amount of air sucked from the air inlets (7) is increased and efficiency is increased by minimizing formation of carbon monoxide.
  • In an embodiment of the present invention, the cross-section of the Venturi throat (10) in the flow direction of the air – gas mixture is elliptical. Thus, the flow is enabled to be controllable by softening the changes of the cross-sectional areas. As there are no sharp area changes on the flow path, the reaction that air encounters is decreased and formation of eddy currents is prevented.
  • In the cooker (1) of the present invention, as the Venturi channel (6) cross-sectional area (B) is kept smaller than the peripheral air – gas outlet area (C) by means of the Venturi throat (10), formation of eddy currents is prevented and the burner (2) is enabled to operate consistently and efficiently at the same time. Furthermore, the vacuum effect in the Venturi channel (6) is increased thereby providing a greater amount of fresh air intake and the carbon monoxide and/or carbon dioxide emission is minimized.

Claims (4)

  1. A cooker (1) comprising a burner (2) that has a burner plate (3); a nozzle (4) that provides injection of gas from the lower side of the burner plate (3); a burner head (5) seated on the burner plate (3); more than one air inlet (7) arranged between the burner plate (3) and the burner head (5) and that provides air intake; a burner cap (8) seated on the burner head (5); more than one outlet (9) arranged between the burner head (5) and the burner cap (8) and a Venturi channel (6) that is arranged at the center of the burner head (5), that extends in the vertical direction from the nozzle (4) towards the burner cap (8), that enables air to be sucked from the air inlets (7) by creating negative pressure and that forms a flow path for the air – gas mixture entering from the air inlet (7) and the nozzle (4) and exiting from the outlets (9), characterized by the Venturi channel (6) comprising a Venturi throat (10) that has a smaller Venturi channel (6) cross-sectional area (B) than the peripheral air – gas outlet area (C) remaining between the burner cap (8) and the Venturi channel (6).
  2. A cooker (1) as in Claim 1, characterized by the Venturi throat (10) that is positioned at the upper half of the Venturi channel (6) close to the burner cap (8).
  3. A cooker (1) as in any one of the above claims, characterized by the Venturi throat (10) that provides the narrowest cross-sectional area on the flow path.
  4. A cooker (1) as in any one of the above claims, characterized by the Venturi throat (10) having an elliptical cross section.
EP15723239.8A 2014-07-08 2015-05-20 A cooker comprising a burner Active EP3167228B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201407981 2014-07-08
PCT/EP2015/061061 WO2016005091A1 (en) 2014-07-08 2015-05-20 A cooker comprising a burner

Publications (2)

Publication Number Publication Date
EP3167228A1 true EP3167228A1 (en) 2017-05-17
EP3167228B1 EP3167228B1 (en) 2019-12-11

Family

ID=53189068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15723239.8A Active EP3167228B1 (en) 2014-07-08 2015-05-20 A cooker comprising a burner

Country Status (2)

Country Link
EP (1) EP3167228B1 (en)
WO (1) WO2016005091A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6067978A (en) * 1997-08-07 2000-05-30 Schlosser; Erich J. Outdoor cooking apparatus with improved auxiliary gas burner
US6537065B1 (en) * 2002-04-04 2003-03-25 Viking Range Corporation Sealed gas burner
US8381714B2 (en) * 2009-11-06 2013-02-26 General Electric Company Burner for cooking appliances
EP2402654B1 (en) * 2010-06-23 2013-07-31 Electrolux Home Products Corporation N.V. Gas stove

Also Published As

Publication number Publication date
EP3167228B1 (en) 2019-12-11
WO2016005091A1 (en) 2016-01-14

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