EP3896338A1 - Brûleur et chauffe-eau à gaz - Google Patents

Brûleur et chauffe-eau à gaz Download PDF

Info

Publication number
EP3896338A1
EP3896338A1 EP19895866.2A EP19895866A EP3896338A1 EP 3896338 A1 EP3896338 A1 EP 3896338A1 EP 19895866 A EP19895866 A EP 19895866A EP 3896338 A1 EP3896338 A1 EP 3896338A1
Authority
EP
European Patent Office
Prior art keywords
burner
ejection
fire
inlet
row
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.)
Pending
Application number
EP19895866.2A
Other languages
German (de)
English (en)
Other versions
EP3896338A4 (fr
Inventor
Wenfeng Chen
Xianchao MENG
Guorong LIANG
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.)
Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Original Assignee
Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
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 Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd filed Critical Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Publication of EP3896338A1 publication Critical patent/EP3896338A1/fr
Publication of EP3896338A4 publication Critical patent/EP3896338A4/fr
Pending legal-status Critical Current

Links

Images

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
    • 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
    • F23D14/045—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 a plurality of burner bars assembled together, e.g. in a grid-like arrangement
    • 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
    • F23D14/08—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 axial outlets at the burner head
    • F23D14/085—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 axial outlets at the burner head with injector axis inclined to the burner head axis
    • 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
    • F23D14/10—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 elongated tubular burner head
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/70—Baffles or like flow-disturbing devices
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements
    • F23M11/04—Means for supervising combustion, e.g. windows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/06—Fail safe for flame failures

Definitions

  • the present application relates to the technical field of gas appliances, in particular to a burner and a gas water heater.
  • the burner is a key component of gas products for gas water heaters and gas wall-mounted boilers.
  • the burner In order to achieve low emission of nitrogen oxides during combustion, the burner usually adopts a water-cooled structure, and it requires a large amount of air intake to form a light combustion, but such a structural design will lead to insufficient gas concentration and unreliable ignition, which will lead to the failure of ignition of the burner and the occurrence of deflagration.
  • the main object of the present application is to provide a burner, which aims to improve concentration of gas at an ignition needle by reducing air ejection amount of a burner row at the ignition needle, so as to realize reliable ignition of gas.
  • the burner provided in the present application includes:
  • the first burner row includes multiple first ejection inlets, and at least one of the multiple first ejection inlets is provided with the first air baffle.
  • the first burner row includes multiple first ejection channels, the multiple first ejection channels are all in communication with the first fire-breathing part, and the multiple first ejection inlets and the multiple first ejection channels are arranged in one-to-one correspondence.
  • the first air baffle includes a body and a connection hem extending from the body to one side, and the connection hem is fixed to the first burner row; and the body is covered on the first ejection inlet, and the body is provided with the first air hole at a position corresponding to the first ejection inlet.
  • the first fire-breathing part is provided with multiple first fire-breathing holes
  • the first fire-breathing part is provided with an induction stopper extending in a direction close to the ignition needle
  • the induction stopper is disposed at least partially around at least one of the multiple first fire-breathing holes
  • one end of the induction stopper close to the ignition needle is arranged in a pointed shape.
  • a minimum distance between the end of the induction stopper close to the ignition needle and the first fire-breathing hole is 6mm to 7mm.
  • the burner further includes:
  • the second burner row is disposed adjacent to the first burner row.
  • the first air baffle and the second air baffle are integrally disposed.
  • the present application further provides a gas water heater, including a burner, where the burner includes:
  • the air ejection amount of the first burner row is reduced by setting the first air baffle at the first ejection inlet of the first burner row, thereby reducing the proportion of air in the mixed gas, that is, relatively increasing the concentration of the gas in the mixed gas, so that when the ignition needle ignites the mixed gas, it is easier to ignite the mixed gas, avoiding ignition deflagration and flame extinguishing during ignition, thus improving the reliability of ignition.
  • the present application provides a burner, which is applied to combustion and heating devices such as gas water heaters and gas wall-mounted boilers.
  • combustion and heating devices such as gas water heaters and gas wall-mounted boilers.
  • the following takes a gas water heater as an example to explain the burner in detail.
  • the burner 1 includes:
  • the burner 1 includes multiple burner rows arranged in parallel.
  • the burner row includes an ejection channel, a fire-breathing part and an ejection inlet.
  • the fire-breathing part and the ejection inlet are respectively located at two ends of the ejection channel.
  • the gas and air enter the ejection channel from the ejection inlet and are mixed in the ejection channel, and the formed mixed gas is ejected from the fire-breathing part for combustion.
  • the fire-breathing part is usually located at an upper end of the burner row, and the ejection inlet is located at a lower end of the burner row.
  • the ejection inlet can be specifically located at a lower end surface or a side wall of the burner row, which is not specifically limited here.
  • the first burner row 10 is a burner row closest to the ignition needle 30 among the multiple burner rows, that is, the ignition needle 30 is arranged corresponding to the first fire-breathing part 130 of the first burner row 10. In order to facilitate the ignition of the ignition needle 30, the ignition needle 30 is disposed close to the first fire-breathing part 130.
  • the first burner row 10 includes the first ejection channel 110, the first fire-breathing part 130 and the first ejection inlet 120.
  • the ignition of the ignition needle 30 can be realized by electronic ignition (piezoelectric ceramic electric spark ignition) or pulse continuous ignition, and the ignition needle 30 can ignite the mixed gas from the first fire-breathing part 130, so as to realize the ignition and combustion of the gas.
  • the purpose of setting the first air baffle 20 is to reduce the air ejection amount of the first burner row 10, thereby reducing the proportion of air in the mixed gas, that is, relatively increasing the concentration of the gas in the mixed gas, so that it is easier for the ignition needle 30 to ignite the mixed gas, avoiding ignition deflagration and flame extinguishing during ignition, thus improving the reliability of ignition.
  • a radial dimension of the first air hole 210 of the first air baffle 20 is smaller than a radial dimension of the first ejection inlet 120, therefore, the ejection effect of the first ejection inlet 120 is relatively weakened, so that the ejection amount of air entering the first ejection inlet 120 is reduced.
  • multiple of the first ejection inlets 120 may be arranged at the lower end of the first burner row 10.
  • at least one first ejection inlet 120 is provided with a first air baffle 20.
  • the three first ejection inlets 120 may all be provided with the first air baffle 20, to simultaneously reduce the air ejection amount of the three first ejection inlets 120.
  • any two of the three first ejection inlets 120 may be provided with the first air baffle 20.
  • one of the three first ejection inlets 120 may be provided with the first air baffle 20.
  • the air ejection amount of the entire first burner row 10 will inevitably be reduced, that is, the proportion of the air in the mixed gas in the entire first burner row 10 will be reduced, so that the concentration of gas in the mixed gas is relatively increased, and the reliability of ignition is improved.
  • the first burner row 10 may includes multiple first ejection inlets 120, and the first burner row 10 may is provided with one or more first ejection channel 110.
  • the first burner row 10 includes only one first ejection channel 110, at this time, the lower end of the first ejection channel 110 is provided with multiple first ejection inlets 120 respectively in communication with the the first ejection channel 110.
  • the multiple first ejection channels 110 are independent from each other, so that the amount of mixed gas of the first burner row 10 increases, which is beneficial to enhance the combustion intensity.
  • the first burner row 10 includes multiple first ejection channels 110, the multiple first ejection channels are all in communication with the first fire-breathing part 130, and the multiple first ejection inlets and the multiple first ejection channels are arranged in one-to-one correspondence.
  • the first burner row 10 includes three first ejection channels 110 and three first ejection inlets 120, and the three first ejection channels are arranged in parallel along the horizontal direction.
  • the temperature of the first burner row 10 is relatively high, so that the first air baffle 20 is preferably made of a high temperature resistant material.
  • the first air baffle 20 is preferably a sheet metal, so that it can be fixed to the first burner row 10 by welding.
  • the first air baffle 20 includes a body 220 and a connection hem 230 extending from the body 220 to one side, and the connection hem 230 is fixed to the first burner row 10.
  • the body 220 is covered on the first ejection inlet 120, and the body 220 is provided with the first air hole 210 at a position corresponding to the first ejection inlet 120.
  • connection hem 230 is fixed to the first burner row 10 by welding, so that the first air baffle 20 is reliably fixed to the first burner row 10.
  • the body 220 is located at the lower end of the first burner row 10 and covers the first ejection inlet 120.
  • the structure of being provided with the first air hole 210 on the body 220 is equivalent to reducing the radial dimension of the first ejection inlet 120, so that the ejection effect at the first ejection inlet 120 is weakened, that is, the amount of the air into the first ejection channel through the first ejection inlet is reduced, so that the gas concentration of the mixed gas is relatively increased, which is more beneficial to the reliable ignition of the gas.
  • connection hem 230 is preferably formed by folding an edge of the body 220.
  • the connection hem 230 may define a notch at a position close to the body 220, so as to reduce a connection area of the connection position between the connection hem 230 and the body 220.
  • an induction stopper 140 may further be provided on the first burner row 10.
  • the induction stopper 140 is a conductor, and a pointed protrusion is provided on the induction stopper corresponding to the ignition needle 30, and the ignition effect is improved by the tip discharge phenomenon between the pointed protrusion and the ignition needle 30.
  • the first fire-breathing part 130 is provided with multiple first fire-breathing holes 131.
  • the first fire-breathing part 130 is provided with an induction baffle 140 extending in a direction close to the ignition needle 30.
  • the induction baffle 140 is disposed at least partially around at least one of the multiple first fire-breathing holes 131, and one end of the induction baffle 140 close to the ignition needle 30 is arranged in a pointed shape.
  • one end of the induction stopper 140 close to the ignition needle 30 is arranged in a pointed shape, so that a tip discharge phenomenon can be generated between the induction stopper 140 and the ignition needle 30.
  • the induction stopper 140 is arranged around the first fire-breathing hole 131, so that the mixed gas ejected from the first fire hole 131 may be gathered by the induction stopper, and the concentration of the mixed gas at the tip discharge is higher, which is more beneficial to the ignition and combustion of the mixed gas.
  • a minimum distance between the end of the induction stopper 140 close to the ignition needle 30 and the first fire-breathing hole 131 is preferably 6mm to 7mm, so that the ignition position of the mixed gas is not too close to the first fire-breathing hole 131, thereby avoiding the flashback phenomenon caused by the combustion flame being too close to the first fire-breathing hole 131.
  • the multiple burner rows further include a second burner row 40, and the second burner row 40 includes a second ejection channel and a second fire-breathing part and a second ejection inlet located at two ends of the second ejection channel respectively.
  • the structure of the second burner row 40 may be similar to or completely different from the structure of the first burner row 10, which is not specifically limited herein.
  • the structure of the second burner row 40 is preferably similar to the structure of the first burner row 10, and the difference is: the second burner row 40 is not provided with an induction stopper 140.
  • the burner 1 further includes:
  • the induction needle 60 may employ a thermocouple or a heat sensitive element as a temperature sensing component, thereby realizing detection of the combustion temperature.
  • the working principle of the second air baffle 50 is similar to that of the first air baffle 20.
  • the gas concentration of the mixed gas in the second ejection channel can be increased by setting the second air baffle 50, which is more beneficial to the combustion of the gas at the induction needle 60, so that the induction needle 60 can better detect the combustion temperature.
  • the second burner row 40 is disposed adjacent to the first burner row 10, at this time, the induction needle 60 is disposed adjacent to the ignition needle 30, the local gas concentration near the induction needle 60 and the ignition needle 30 is relatively large, which is more beneficial to the ignition and combustion of the gas at the local position.
  • the first air baffle 20 and the second air baffle 50 are also close to each other, in order to simplify the structure of the burner 1, the first air baffle 20 and the second air baffle 50 are integrally disposed, so that a first air hole 210 corresponding to the first ejection inlet 120 and a second air hole corresponding to the second ejection inlet are respectively defined on the same body 220.
  • the first air baffle 20 and the second air baffle 50 will only reduce the air ejection amount at the first burner row 10 and the second burner row 40, thereby increasing the gas concentration at the ignition and induction positions.
  • the air ejection amount of the remaining burner rows will not change, that is, the first burner row 10 and the second burner row 40 have limited influence on the whole burner 1, therefore, the change of the air ejection amount in the first burner row 10 and the second burner row 40 will not result in the increase of nitrogen oxides produced by the burner 1 after combustion.
  • the present application further provides a gas water heater, which includes a burner, and the specific structure of the burner refers to the above embodiments. Since the gas water heater adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP19895866.2A 2018-12-10 2019-12-10 Brûleur et chauffe-eau à gaz Pending EP3896338A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811508252.XA CN111288445A (zh) 2018-12-10 2018-12-10 燃烧器及燃气热水器
PCT/CN2019/124387 WO2020119689A1 (fr) 2018-12-10 2019-12-10 Brûleur et chauffe-eau à gaz

Publications (2)

Publication Number Publication Date
EP3896338A1 true EP3896338A1 (fr) 2021-10-20
EP3896338A4 EP3896338A4 (fr) 2022-02-16

Family

ID=71020576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19895866.2A Pending EP3896338A4 (fr) 2018-12-10 2019-12-10 Brûleur et chauffe-eau à gaz

Country Status (3)

Country Link
EP (1) EP3896338A4 (fr)
CN (1) CN111288445A (fr)
WO (1) WO2020119689A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112879905A (zh) * 2021-01-27 2021-06-01 广东超人节能厨卫电器有限公司 燃烧器和燃气灶具

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2002448A (en) * 1932-11-01 1935-05-21 Harry H Dodge Atmospheric gas burner
AU666034B2 (en) * 1992-09-11 1996-01-25 Rinnai Kabushiki Kaisha A porous gas burner for a water heater and a method of making thereof
CN2636115Y (zh) * 2003-07-11 2004-08-25 甘肃省科学院自然能源研究所 多混合垂直引射燃气灶燃烧器
CN2804641Y (zh) * 2005-07-13 2006-08-09 中山华帝燃具股份有限公司 一种燃气灶具空气调节器
CN203628655U (zh) * 2013-10-21 2014-06-04 芜湖美的厨卫电器制造有限公司 稳焰燃烧器组件及热水器的燃烧器
JP6226181B2 (ja) * 2013-10-25 2017-11-08 株式会社ノーリツ 燃焼装置およびこれを備えた温水装置
JP5846264B1 (ja) * 2014-07-25 2016-01-20 株式会社ノーリツ 給湯装置
CN207065570U (zh) * 2017-08-16 2018-03-02 芜湖美的厨卫电器制造有限公司 燃烧器及燃气热水器
CN209386288U (zh) * 2018-12-10 2019-09-13 芜湖美的厨卫电器制造有限公司 燃烧器及燃气热水器

Also Published As

Publication number Publication date
EP3896338A4 (fr) 2022-02-16
CN111288445A (zh) 2020-06-16
WO2020119689A1 (fr) 2020-06-18

Similar Documents

Publication Publication Date Title
EP3896338A1 (fr) Brûleur et chauffe-eau à gaz
US9068760B2 (en) Heating appliance for air heating
US20180119989A1 (en) Hot water apparatus
CN112066369B (zh) 燃烧器、壁挂炉及热水器
CN209386288U (zh) 燃烧器及燃气热水器
CN113137626A (zh) 点火装置、燃烧器及燃气热水器
CN210050802U (zh) 一种燃烧器以及燃气热水器
CN212319779U (zh) 点火装置和燃气热水器
CN210373529U (zh) 火焰检测结构、燃烧器及燃气热水器
CN213686809U (zh) 燃烧器小火盖、燃烧器及灶具
CN216644206U (zh) 燃烧装置和烹饪设备
KR0159185B1 (ko) 가스버너
CN219422651U (zh) 红外线燃气烤炉
CN211551580U (zh) 一种具有叠片式火孔结构的燃烧器
JPS61285317A (ja) ガスバ−ナ
CN211011361U (zh) 一种叠片式火孔组件
CN219550596U (zh) 一种燃气点火装置以及灶具燃烧器
JPH0612342Y2 (ja) ストーブ
JPH037731Y2 (fr)
JP3006051U (ja) 燃焼装置
JP3061749B2 (ja) こんろバーナ
JPS6219306Y2 (fr)
CN208205079U (zh) 一种用于燃气灶熄火保护机构的传感装置
CN110230824A (zh) 火焰检测结构、燃烧器及燃气热水器
KR100327265B1 (ko) 액체연료연소장치

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210526

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Free format text: PREVIOUS MAIN CLASS: F23D0014720000

Ipc: F23D0014700000

A4 Supplementary search report drawn up and despatched

Effective date: 20220114

RIC1 Information provided on ipc code assigned before grant

Ipc: F23D 14/64 20060101ALI20220110BHEP

Ipc: F23D 14/04 20060101ALI20220110BHEP

Ipc: F23D 14/70 20060101AFI20220110BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20231220