EP1467153A1 - Gasofen - Google Patents

Gasofen Download PDF

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Publication number
EP1467153A1
EP1467153A1 EP03700572A EP03700572A EP1467153A1 EP 1467153 A1 EP1467153 A1 EP 1467153A1 EP 03700572 A EP03700572 A EP 03700572A EP 03700572 A EP03700572 A EP 03700572A EP 1467153 A1 EP1467153 A1 EP 1467153A1
Authority
EP
European Patent Office
Prior art keywords
air
burner
combustion chamber
combustion
air supply
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
EP03700572A
Other languages
English (en)
French (fr)
Other versions
EP1467153A4 (de
EP1467153B1 (de
Inventor
Tsutomu RINNAI KABUSHIKI KAISHA SOBUE
Koji RINNAI KABUSHIKI KAISHA YANO
Yutaka TOKYO GAS KABUSHIKI KAISHA YAMADA
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.)
Rinnai Corp
Original Assignee
Rinnai Corp
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 Rinnai Corp filed Critical Rinnai Corp
Publication of EP1467153A1 publication Critical patent/EP1467153A1/de
Publication of EP1467153A4 publication Critical patent/EP1467153A4/de
Application granted granted Critical
Publication of EP1467153B1 publication Critical patent/EP1467153B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • F24C3/06—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate without any visible flame
    • F24C3/067—Ranges
    • 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
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other

Definitions

  • a gas stove as shown in FIG. 5(a) that comprises a heat-resistance glass top panel 101 disposed on an upper surface of a combustion chamber housing a burner 100 for heating an object to be cooked placed on the glass top panel 101.
  • an air supply/discharge fan 102 supplies combustion air to the burner 100 and discharges combustion exhaust gas from the burner 100 through an exhaust slot 103.
  • FIG. 5(b) is a cross-sectional view showing the gas stove of FIG. 5(a) from one side, wherein a controller 130 controls through a gas proportional valve 124 the flow rate of a fuel gas supplied from a gas supply passage 121 through a nozzle 122 to a mixture pipe 123, and controls through the air supply/discharge fan 102 the flow rate of combustion air supplied from an air supply passage 120 to the mixture pipe 123, according to a target combustion rate for the burner 100 set through a combustion rate adjusting switch 104 that adjusts the combustion rate of the burner 100.
  • a controller 130 controls through a gas proportional valve 124 the flow rate of a fuel gas supplied from a gas supply passage 121 through a nozzle 122 to a mixture pipe 123, and controls through the air supply/discharge fan 102 the flow rate of combustion air supplied from an air supply passage 120 to the mixture pipe 123, according to a target combustion rate for the burner 100 set through a combustion rate adjusting switch 104 that adjusts the combustion rate of the
  • the burner when the burner is burning, fuel gas is supplied from the fuel gas supply means and combustion air is supplied from the air supply/discharge fan.
  • the interior of the combustion chamber becomes very hot by the heat radiated from the burner and the heat radiated from the porous body being heated by the hot combustion exhaust gas from the burner, and heat is radiated from the side surface of the combustion chamber.
  • the air supply/discharge fan air is also supplied through the air supply passage and via the air supply branch pipe into the space defined by the side surface of the combustion chamber and the external wall. Therefore, the air supplied into the space suppresses the heat radiated from the side surface of the combustion chamber from being transmitted to the interior of the gas stove, and thus prevents the breakdown of the electrical components such as the motor activating the air supply/discharge fan caused by excessive heating of the interior of the gas stove. Further, according to the first aspect of the present invention, there is no need to provide a fan for supplying air into the space separately from the air supply/discharge fan, so the increase of cost of the gas stove can be suppressed.
  • the gas stove further characterizes in that the space is formed airtightly except for a supply opening and a discharge opening for air, the air supply branch pipe being connected to the supply opening, and the gas stove further comprises an exhaust recycle pipe for communicating the air discharge opening with the air supply/discharge fan and recycling the air discharged through the discharge opening to the air supply/discharge fan.
  • the air being supplied from the air supply branch pipe through the supply opening into the space is heated by the heat radiated from the side surface of the combustion chamber. Then, this heated air is discharged from the discharge opening formed to the space, travels through the discharge recycle pipe and sucked into the air supply/discharge fan, and then supplied through the air supply passage to the burner.
  • the temperature of combustion air being supplied to the burner is increased so that the temperature of the combustion flames of the burner becomes higher and the combustion speed of the burner becomes faster, thus the surface temperature of the burner is increased.
  • the temperature of the combustion exhaust discharged from the burner is also increased, by which the radiation conversion efficiency of the porous body through which the combustion exhaust passes is enhanced.
  • the gas stove characterizes in comprising an external wall surrounding a side surface of the combustion chamber with a clearance therebetween so as to form a space defined by the side surface and the external wall that is airtight except for a supply opening and a discharge opening for air
  • the air supply passage is composed of a first air supply communicating pipe that communicates an air delivery port of the air supply/discharge fan with the supply opening, said space, and a second air supply communicating pipe that communicates the discharge opening with the burner.
  • the air being supplied through the first air supply communicating pipe into the space suppresses the heat radiated from the side surface of the combustion chamber from being transmitted to the interior of the gas stove, and the combustion air being heated while it is passed through the space and supplied through the second air supply communicating pipe to the burner causes increase of the combustion temperature of the burner and the radiation conversion efficiency of the porous body.
  • the gas stove further comprises an external wall surrounding a side surface of the combustion chamber with a clearance therebetween so as to form a space defined by the side surface and the external wall that is airtight except for a supply opening and a discharge opening for air, the discharge opening disposed to open toward a portion of the top panel corresponding to the outer side of the combustion chamber, and a cooling air supply means for supplying cooling air through the supply opening into the space.
  • the cooling air supplied by the cooling air supply means through the air supply opening into the space passes through the space and out through the discharge opening toward the portion of the top panel positioned outside the combustion chamber.
  • the air passing through the space suppresses the heat radiated from the side surface of the combustion chamber from being transmitted to the interior of the gas stove, and the air discharged through the discharge opening cools the portion of the top panel positioned outside the combustion chamber.
  • the present invention can therefore prevent the user from feeling the heat caused by the heating of the portion of the top panel positioned outside the combustion chamber.
  • the gas stove characterizes in that an external wall is disposed to surround a side surface of the combustion chamber with a clearance between the side surface, thereby forming a space defined by the side surface and the external wall that is airtight except for a supply opening and a discharge opening for air, the discharge opening disposed in communication with the combustion chamber and opening toward a bottom surface of the top panel, and the cooling air supply means supplies cooling air from the supply opening through the space and the discharge opening into the combustion chamber.
  • the cooling air supply means is composed of an air supply branch pipe that is branched out from the air supply passage.
  • cooling air is supplied through the air supply branch pipe either into the space or into the combustion chamber, so there is no need to dispose a fan for supplying cooling air separately from the air supply/discharge fan. Therefore, the increase of cost of the gas stove can be suppressed.
  • FIG. 1 is an external view and a block diagram of a gas stove according to a fist embodiment of the present invention
  • FIG. 2 is a block diagram of a gas stove according to second and third embodiments of the present invention
  • FIG. 3 is a block diagram showing a gas stove according to a fourth embodiment of the present invention
  • FIG. 4 is a block diagram of a gas stove according to fifth and sixth embodiments of the present invention.
  • FIG. 1 is an external view and a block diagram of a gas stove according to a fist embodiment of the present invention
  • FIG. 2 is a block diagram of a gas stove according to second and third embodiments of the present invention
  • FIG. 3 is a block diagram showing a gas stove according to a fourth embodiment of the present invention
  • FIG. 4 is a block diagram of a gas stove according to fifth and sixth embodiments of the present invention.
  • the heat insulation space 12 is formed in airtight manner with the exception of a supply opening 13 and a discharge opening 14 for air.
  • the supply opening 13 is disposed in the lower area of the heat insulation space 12, and is communicated with the air supply passage 20 through an air supply branch pipe 15 (which corresponds to a cooling air supplymeans according to the present invention).
  • the discharge opening 14 is disposed along the side surface of the combustion chamber 10 at the upper area of the heat insulation space 12, so that air is discharged toward a portion of the glass top panel 4 corresponding to the outer area of the combustion chamber 10 (in the drawing, the portion corresponding to the inner area of diameter L20 excluding the inner area of diameter L10).
  • the controller 30 controls the flow rate of fuel gas supplied to the burner 2 by adjusting the opening of the gas proportional valve 25 while the main gas valve 24 is opened, and also controls the flow rate of combustion air supplied to the burner 2 by adjusting the rotation speed of the air supply/discharge fan 6.
  • the object to be cooked is heated through the glass top panel 4 by the heat 51 from the combustion surface of the burner 2 produced by combustion flames 50 of the burner 2 and the radiant heat 52 generated from the porous body 3 being heated by the passing of hot combustion discharge gas from the burner 2.
  • the interior of the combustion chamber 10 becomes very hot (approximately 1000 oC) due to the heat 51 from the burner 2 and the radiant heat 52 from the porous body 3, and therefore the side surface 11 of the combustion chamber 10 also generates radiant heat.
  • the side surface 11 of the combustion chamber 10 is formed of plate metal made for example of stainless steel, and the inner side of the side surface 11 (close to the porous body 3) is exposed to hot heat from the combustion exhaust gas of the burner 2 and oxidized thereby, by which the radiation ratio is increased.
  • the heat insulation space 12 and the heat insulating effect of the air passing through the heat insulation space 12 prevents the external wall 9 from being heated excessively, so the radiation ratio of the external wall 9 is prevented from being increased by oxidization.
  • the discharge opening 14 of the heat insulation space 12 is placed to face the portion of the glass top panel 4 corresponding to the outer side of the combustion chamber 10, but the effects of the present invention can be achieved by disposing the discharge opening of the heat insulation space 12 at other locations.
  • the heat insulation space 12 is formed airtightly with the exception of the supply opening 13 and the discharge opening 14 for air, but even if the heat insulation space 12 is not formed airtightly, the same effects of the present invention can be achieved by supplying air into the heat insulation space 12 through the air supply branch pipe 15.
  • FIG. 2(a) The parts of the gas stove shown here which are identical to those shown in FIG. 1 are denoted with the same reference numbers, and will not be described in detail below.
  • the air being heated by the heat radiated from the side surface of the combustion chamber 10 while traveling through the heat insulation space is introduced through the exhaust recycle pipe 42 into the air intake port 41 of the air supply/discharge fan 6. Thereafter, the heated air is mixed with the room air taken in through the air intake port 41, and supplied to the air supply passage 20.
  • the air flowing through the heat insulation space 12 suppresses the transmission of heat radiated from the side surface of the combustion chamber 10 to the interior of the gas stove.
  • the temperature of the combustion flames 50 of the burner 2 is raised as a result, and the combustion speed of the burner 2 is also increased, so the surface temperature of the burner 2 during combustion is increased and the temperature of the combustion exhaust discharged through the porous body 3 is also increased, thus the radiation conversion efficiency at the porous body 3 is improved.
  • FIG. 2(b) The parts which are identical to those of the gas stoves shown in FIG. 1 and FIG. 2 are denoted by the same reference numbers, and will not be described in detail below.
  • the present embodiment does not have the air supply branch pipe 15 (refer to FIG. 2(a)) which was disposed in the second embodiment, and the supply openings 43 are opened at the bottom of the heat insulation space 12.
  • air is fed through the supply opening 43 into the heat insulation space 12 by the operation of the air supply/discharge fan 6, and the air is heated by the heat radiated from the side surface of the combustion chamber 10 while it passes through the heat insulation space, then lead through the air supply communicating pipe 42 to the air intake port 41 of the air supply/discharge fan 6.
  • the air in the room is supplied through the open air supply opening 13 into the heat insulation space 12. Therefore, the heat insulating effect of the heat insulation space 12 will not be deteriorated, but still, the combustion air supplied to the burner 2 is heated so as to increase the combustion temperature of the burner 2 and to improve the radiation conversion efficiency at the porous body 3.
  • the heat insulation space 12 is formed in airtight manner except for the intake opening 45 and discharge opening 46 for air, and the space is extended so as to surround the bottom surface of the combustion chamber.
  • the air supply passage 20 (corresponding to a first air supply communicating pipe according to the present invention) is connected to the supply opening 45 of the heat insulation space 12, and the mixture pipe 23 (corresponding to a second air supply communicating pipe according to the present invention) is connected to the discharge opening 46 of the heat insulation space 12.
  • the air sucked into the air supply/discharge fan 6 is fed through the air supply passage 20, the heat insulation space 12 and the mixture pipe 23 to the gas burner 2.
  • the heat insulating effect of the heat insulation space 12 is enhanced by the air passing through the heat insulation space 12 from the supply opening 45 toward the discharge opening 46, and the heat radiated from the side and bottom surfaces of the heat insulation space 12 affectively heats the air passing through the heat insulation space 12.
  • the air flowing into the combustion chamber 10 from the discharge opening 60 reduces the ambient temperature within the combustion chamber 10, so the heat quantity radiated from the side surface of the combustion chamber 10 is reduced.
  • This arrangement prevents abnormal heating of the interior of the gas stove 1 caused by the heat radiated from the side surface 11 of the combustion chamber 10. Furthermore, since the ambient temperature within the combustion chamber 10 is decreased, the upper surface of the glass top panel 4 can be prevented from being overheated.
  • FIG. 4 (b).
  • the parts which are identical to those of the gas stove shown in FIG. 1 are denoted by the same reference numbers, and will not be described in detail below.
  • a discharge opening 61 of the heat insulation space 12 is communicated with the combustion chamber 10 in a manner similar to the second embodiment described earlier, and the discharge opening 61 opens toward the lower surface of the glass top panel 4.
  • the heat insulating effect is achieved by the heat insulation space 12 according to the present embodiment, similar to the first embodiment. Further, the air blown toward the glass top panel 4 from the discharge opening 61 enhances the effect of cooling the glass top panel 4 while lowering the ambient temperature within the combustion chamber 10, similar to the fifth embodiment.
  • the cooling air can also be supplied to the heat insulation space 12 through another fan disposed separately from the air supply/discharge fan 6.
  • the first through sixth embodiments described above illustrates a gas stove 1 having a porous body 3 disposed outside a burner 2, but the present invention is also applicable to a gas stove having a porous body 3 disposed to the inner side and a burner disposed to the outer side.
  • the gas stove according to the present invention comprises a combustion chamber having a top panel disposed thereabove for placing an object to be heated, a surface-combustion burner disposed within the combustion chamber in confronting relation to the top panel and a porous body for radiating exhaust heat, and can be applied to a gas stove with enhanced thermal efficiency.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Air Supply (AREA)
EP03700572A 2002-01-16 2003-01-15 Gasofen Expired - Fee Related EP1467153B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002007534A JP3652652B2 (ja) 2002-01-16 2002-01-16 ガスこんろ
JP2002007534 2002-01-16
PCT/JP2003/000271 WO2003060382A1 (en) 2002-01-16 2003-01-15 Gas stove

Publications (3)

Publication Number Publication Date
EP1467153A1 true EP1467153A1 (de) 2004-10-13
EP1467153A4 EP1467153A4 (de) 2006-02-08
EP1467153B1 EP1467153B1 (de) 2009-03-25

Family

ID=19191334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03700572A Expired - Fee Related EP1467153B1 (de) 2002-01-16 2003-01-15 Gasofen

Country Status (6)

Country Link
EP (1) EP1467153B1 (de)
JP (1) JP3652652B2 (de)
KR (1) KR100519525B1 (de)
CN (1) CN1261718C (de)
DE (1) DE60326818D1 (de)
WO (1) WO2003060382A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2419183A (en) * 2004-10-12 2006-04-19 Lg Electronics Inc Gas range
ITTO20121158A1 (it) * 2012-12-27 2014-06-28 Indesit Co Spa Apparecchio di cottura con bruciatore a gas di potenza termica elevata e metodo per il suo funzionamento

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100455891C (zh) * 2004-09-06 2009-01-28 乐金电子(天津)电器有限公司 煤气辐射烹调器具
JP4415123B2 (ja) * 2004-12-24 2010-02-17 パロマ工業株式会社 ガスコンロ
CN102889622A (zh) * 2012-11-05 2013-01-23 焦敬博 红外线燃烧炉
CN103322607B (zh) * 2013-04-08 2015-12-02 中山炫能燃气科技股份有限公司 一种吸热、储能、热交换器
CN103225827B (zh) * 2013-04-08 2015-08-19 中山炫能燃气科技股份有限公司 一种红外光波热能与热烟气分路吸收转换系统
CN103234229B (zh) * 2013-04-08 2015-08-05 中山炫能燃气科技股份有限公司 一种抗反射红外热能与多孔热烟气分路定向输送装置
CN103307642A (zh) * 2013-05-31 2013-09-18 天津大学 一种热集成的燃气炉系统及操作方法
CN104990081A (zh) * 2015-07-16 2015-10-21 周通 一种商用厨具炉头的燃气排空装置
CN106500135B (zh) 2015-09-03 2020-01-14 Lg电子株式会社 燃气烹饪设备
CN108731031A (zh) * 2017-04-25 2018-11-02 深圳市元疆科技有限公司 一种封闭燃烧炉头燃烧面二次空气供给及台面底部降温方法和结构
CN109611841A (zh) * 2018-12-06 2019-04-12 上海正宏厨房设备有限公司 一种多点喷射燃气炉头
CN113137643A (zh) * 2020-01-16 2021-07-20 佛山罗丹合众电器科技有限公司 一种燃气灶具
JP7500485B2 (ja) 2021-03-25 2024-06-17 大阪瓦斯株式会社 燃焼装置及び燃料電池システム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434791A (en) * 1965-02-15 1969-03-25 Rinnai Kk Burner
EP0601270A1 (de) * 1992-12-09 1994-06-15 Nkk Corporation Verbrennungsvorrichtung mit Wärmerückführung
US5524605A (en) * 1995-02-27 1996-06-11 Toyotomi Co., Ltd. Cooking burner
EP1312867A2 (de) * 2001-11-19 2003-05-21 Rinnai Kabushiki Kaisha Gas-Heizgerät
EP1316756A2 (de) * 2001-11-29 2003-06-04 Rinnai Kabushiki Kaisha Gas-Heizgerät

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0533844Y2 (de) * 1986-06-10 1993-08-27

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434791A (en) * 1965-02-15 1969-03-25 Rinnai Kk Burner
EP0601270A1 (de) * 1992-12-09 1994-06-15 Nkk Corporation Verbrennungsvorrichtung mit Wärmerückführung
US5524605A (en) * 1995-02-27 1996-06-11 Toyotomi Co., Ltd. Cooking burner
EP1312867A2 (de) * 2001-11-19 2003-05-21 Rinnai Kabushiki Kaisha Gas-Heizgerät
EP1316756A2 (de) * 2001-11-29 2003-06-04 Rinnai Kabushiki Kaisha Gas-Heizgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO03060382A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2419183A (en) * 2004-10-12 2006-04-19 Lg Electronics Inc Gas range
GB2419183B (en) * 2004-10-12 2007-09-12 Lg Electronics Inc Gas range
US7481210B2 (en) 2004-10-12 2009-01-27 Lg Electronics Inc. Gas range
ITTO20121158A1 (it) * 2012-12-27 2014-06-28 Indesit Co Spa Apparecchio di cottura con bruciatore a gas di potenza termica elevata e metodo per il suo funzionamento

Also Published As

Publication number Publication date
JP3652652B2 (ja) 2005-05-25
WO2003060382A1 (en) 2003-07-24
EP1467153A4 (de) 2006-02-08
JP2003207135A (ja) 2003-07-25
CN1261718C (zh) 2006-06-28
EP1467153B1 (de) 2009-03-25
CN1592830A (zh) 2005-03-09
DE60326818D1 (de) 2009-05-07
KR100519525B1 (ko) 2005-10-05
KR20030062220A (ko) 2003-07-23

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