EP3550209B1 - Gas burner unit for a heat exchanger - Google Patents

Gas burner unit for a heat exchanger Download PDF

Info

Publication number
EP3550209B1
EP3550209B1 EP19460016.9A EP19460016A EP3550209B1 EP 3550209 B1 EP3550209 B1 EP 3550209B1 EP 19460016 A EP19460016 A EP 19460016A EP 3550209 B1 EP3550209 B1 EP 3550209B1
Authority
EP
European Patent Office
Prior art keywords
baffle
air
burner
wall
fuel duct
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.)
Active
Application number
EP19460016.9A
Other languages
German (de)
French (fr)
Other versions
EP3550209A1 (en
Inventor
Tomasz CIESLIK
Mariusz Kuzma
Tomasz Siemienczuk
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.)
AIC Sp zoo
Original Assignee
AIC Sp zoo
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 AIC Sp zoo filed Critical AIC Sp zoo
Priority to PL19460016T priority Critical patent/PL3550209T3/en
Publication of EP3550209A1 publication Critical patent/EP3550209A1/en
Application granted granted Critical
Publication of EP3550209B1 publication Critical patent/EP3550209B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • 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
    • 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
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/102—Flame diffusing means using perforated plates

Definitions

  • the invention concerns a gas burner unit intended for a heat exchanger.
  • the heat exchanger gas burner unit incorporates a perforated burner wall and an air and fuel duct used to supply the air and fuel mix to the perforated burner wall.
  • the operating burner unit generates substantial noise which can be a nuisance to the surrounding environment.
  • JPH 0264306 A is a heat exchanger in which the inner space of the chamber for the air and fuel mix supplied to the burner is divided with a flat baffle spreading along the chamber and featuring small holes.
  • the baffle is intended to e.g. suppress the noise generated by the operating burner.
  • EP 1 498 658 A1 is a gas burner suitable for use in a domestic central heating boiler which includes a burner head preferably in the form of a ceramic tile having an entry side face and an opposite exit side face.
  • the burner being made of a ceramic material through which a gas and air mixture may pass from the entry side face to the exit side face.
  • the burner includes means for introducing a gas and air mixture to the entry side face of the burner head so that the mixture may pass through the burner head and burn on exiting from the exit side face of the burner head.
  • the burner further includes a baffle plate spaced between and 1.8mm from the entry side face of the burner head, the baffle plate including a plurality of orifices passing there through which are between 1 and 1.3 mm in diameter.
  • a burner for use with an igniter for firing a flame into a heat-exchanger includes a body having a sidewall that defines an interior chamber. A first opening in the body receives a pre-mixed mixture of air and fuel. A second opening in the body is in fluid communication with the first opening. A distributor connected to the body closes the second opening.
  • the distributor includes a first portion and at least one curved second, portion provided on the first portion. Each second portion includes a plurality of first perforations in fluid communication with the first opening in the body. The first perforations of one second portion are positioned adjacent to the igniter such that ignition of the pre-mix mixture flowing through the first perforations results in a flame through the second portion.
  • Document JP 2000 055316 A discloses surface combustion device in which a surface combustion body is constituted of a porous fabric type matter, consisting of the braided matter or the woven matter of fibers made of a heat resistant steel and having high venting property, and a porous reinforcing member, having a high venting property, which are contacted closely to each other, while the surface combustion body is installed at the opening part of the metallic easing so that the reinforcing member is positioned at the side of the box type metallic casing and a first porous dispersing plate, having a porosity of half of that of the fabric matter and the reinforcing member, is installed in the box type metallic easing at the upstream side of the reinforcing member.
  • Document WO 2017/194395 A1 discloses a cylindrical gas premix burner which comprises a cylindrical burner deck onto which the flames are stabilized when the burner is in use, a mixing chamber inside the cylindrical burner deck, an inlet device mounted perpendicularly to the axial direction of the cylindrical burner deck for the supply of premix gas into the mixing chamber, and an end cap closing off the mixing chamber at the side opposite to the side where the inlet device is provided.
  • the inlet device comprises a perforated metal plate.
  • the perforations in the perforated metal plate are provided for the supply of premix gas into the mixing chamber.
  • the perforated metal plate is dome shaped; such that perforations in the perforated metal plate arc located at different height levels from the base of the cylindrical burner deck.
  • the purpose of the invention is to develop such a burner unit structure which will allow to reduce substantially the noise which is generated by the burner in operation.
  • the gas burner unit intended for a heat exchanger having a perforated burner wall and an air and fuel duct in which, over the perforated burner wall, there is a transverse baffle featuring holes and dividing the air and fuel duct into two segments, where the baffle is shaped so that the cross section of the segment of the air and fuel duct located between the baffle and the perforated burner wall increases along the baffle towards the perforated burner wall, and the baffle is positioned in the air and fuel duct so that the cross section of the segment of the air and fuel duct located within the inner space-delimited by the baffle increases towards the perforated burner wall, according to the invention is that the total area of the holes in the baffle accounts for 0.3 to 1.2 of the area of the opening of the fan used to supply the air and fuel mix to the air and fuel duct, the gas burner unit comprises a burner plate to which the baffle, air and fuel duct, and perforated wall of the burner are fixed, wherein the baffle is fitted with a mounting flange used to screw
  • the gas burner unit intended for a heat exchanger incorporates a perforated wall 1 of the burner, air and fuel duct 2, where there is a transverse baffle 3 over the perforated wall 1 of the burner, and further includes the plate 6 of the burner.
  • Fixed to the plate 6 of the burner is the baffle 3, air and fuel duct 2, and perforated wall 1 of the burner.
  • the baffle 3 is given the shape of the side wall of a cone hollow inside ( Fig. 2 to Fig.
  • baffle 3 features round holes 4 through which the air and fuel mix is supplied to the perforated wall 1 of the burner, as well as a mounting flange 5 used to screw the baffle 3 to the plate 6 of the burner.
  • the burner unit described in the first example incorporates the baffle 3 in the shape of the side wall of a truncated cone ( Fig. 5 to Fig. 7 ) closed with a wall on the side of the smaller base, where the baffle is oriented in the direction opposite to the perforated wall 1 of the burner and divides the air and fuel duct 2 into two segments: the segment under the baffle 3 and the one over the baffle 3.
  • the cross section of the segment of the air and fuel duct 2 located within the inner space delimited by the baffle 3 increases towards the perforated wall 1 of the burner.
  • the baffle 3 features rectangular holes 4 arranged axially, and is fitted with a mounting flange 5 used to screw the baffle 3 to the burner plate 6.
  • the burner unit described in example 1 incorporates the baffle 3 in the shape of an open dome ( Fig. 8 to Fig. 10 ), oriented in the direction opposite to the perforated wall 1 of the burner, where the baffle divides the air and fuel duct 2 into two segments: the segment under the baffle 3 and the one over the baffle 3.
  • the cross section of the segment of the air and fuel duct 2 located within the inner space delimited by the baffle 3 increases towards the perforated wall 1 of the burner.
  • the baffle 3 features square holes 4.
  • the baffle 3 is welded to the burner plate 6.
  • the burner unit described in embodiment one incorporates the baffle 3 in the shape of the side wall of a truncated pyramid ( Fig. 11 to Fig. 13 ) closed with a wall on the side of the smaller base, where the baffle is oriented in the direction opposite to the perforated wall 1 of the burner and divides the air and fuel duct 2 into two segments: the segment under the baffle 3 and the one above the baffle 3.
  • the cross section of the segment of the air and fuel duct 2 located within the inner space delimited by the baffle 3 increases towards the perforated wall 1 of the burner.
  • the baffle 3 features round holes 4.
  • the baffle 3 is welded to the burner plate 6.
  • the total area of the holes 4 in the baffle 3 accounts for 0.3 to 1.2 of the area of the opening of the fan used to supply the air and fuel mix to the air and fuel duct 2.
  • the air and fuel mix is supplied via the air and fuel duct 3 to the perforated wall 1 of the burner through the holes 4 in the baffle 3.
  • the shape of the baffle 3 and its positioning in the air and fuel duct 2 according to the invention ensures substantial reduction of noise accompanying the work of the burner unit.

Landscapes

  • 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)

Description

  • The invention concerns a gas burner unit intended for a heat exchanger.
  • In the known solutions, the heat exchanger gas burner unit incorporates a perforated burner wall and an air and fuel duct used to supply the air and fuel mix to the perforated burner wall. The operating burner unit generates substantial noise which can be a nuisance to the surrounding environment.
  • Known from patent document JPH 0264306 A is a heat exchanger in which the inner space of the chamber for the air and fuel mix supplied to the burner is divided with a flat baffle spreading along the chamber and featuring small holes. The baffle is intended to e.g. suppress the noise generated by the operating burner.
  • Know from patent document EP 1 498 658 A1 is a gas burner suitable for use in a domestic central heating boiler which includes a burner head preferably in the form of a ceramic tile having an entry side face and an opposite exit side face. The burner being made of a ceramic material through which a gas and air mixture may pass from the entry side face to the exit side face. The burner includes means for introducing a gas and air mixture to the entry side face of the burner head so that the mixture may pass through the burner head and burn on exiting from the exit side face of the burner head. The burner further includes a baffle plate spaced between and 1.8mm from the entry side face of the burner head, the baffle plate including a plurality of orifices passing there through which are between 1 and 1.3 mm in diameter.
  • Document WO 2014/116970 A2 discloses a burner for use with an igniter for firing a flame into a heat-exchanger includes a body having a sidewall that defines an interior chamber. A first opening in the body receives a pre-mixed mixture of air and fuel. A second opening in the body is in fluid communication with the first opening. A distributor connected to the body closes the second opening. The distributor includes a first portion and at least one curved second, portion provided on the first portion. Each second portion includes a plurality of first perforations in fluid communication with the first opening in the body. The first perforations of one second portion are positioned adjacent to the igniter such that ignition of the pre-mix mixture flowing through the first perforations results in a flame through the second portion.
  • Document JP 2000 055316 A discloses surface combustion device in which a surface combustion body is constituted of a porous fabric type matter, consisting of the braided matter or the woven matter of fibers made of a heat resistant steel and having high venting property, and a porous reinforcing member, having a high venting property, which are contacted closely to each other, while the surface combustion body is installed at the opening part of the metallic easing so that the reinforcing member is positioned at the side of the box type metallic casing and a first porous dispersing plate, having a porosity of half of that of the fabric matter and the reinforcing member, is installed in the box type metallic easing at the upstream side of the reinforcing member.
  • Document WO 2017/194395 A1 discloses a cylindrical gas premix burner which comprises a cylindrical burner deck onto which the flames are stabilized when the burner is in use, a mixing chamber inside the cylindrical burner deck, an inlet device mounted perpendicularly to the axial direction of the cylindrical burner deck for the supply of premix gas into the mixing chamber, and an end cap closing off the mixing chamber at the side opposite to the side where the inlet device is provided. The inlet device comprises a perforated metal plate. The perforations in the perforated metal plate are provided for the supply of premix gas into the mixing chamber. The perforated metal plate is dome shaped; such that perforations in the perforated metal plate arc located at different height levels from the base of the cylindrical burner deck.
    The purpose of the invention is to develop such a burner unit structure which will allow to reduce substantially the noise which is generated by the burner in operation.
  • The gas burner unit intended for a heat exchanger, having a perforated burner wall and an air and fuel duct in which, over the perforated burner wall, there is a transverse baffle featuring holes and dividing the air and fuel duct into two segments, where the baffle is shaped so that the cross section of the segment of the air and fuel duct located between the baffle and the perforated burner wall increases along the baffle towards the perforated burner wall, and the baffle is positioned in the air and fuel duct so that the cross section of the segment of the air and fuel duct located within the inner space-delimited by the baffle increases towards the perforated burner wall, according to the invention is that the total area of the holes in the baffle accounts for 0.3 to 1.2 of the area of the opening of the fan used to supply the air and fuel mix to the air and fuel duct, the gas burner unit comprises a burner plate to which the baffle, air and fuel duct, and perforated wall of the burner are fixed, wherein the baffle is fitted with a mounting flange used to screw the baffle to the burner plate, and the baffle is given the shape of the side wall of a cone or truncated cone, closed on the side of the smaller base, or shaped into an open dome, or side wall of a pyramid, or side wall of a truncated pyramid, closed on the side of the smaller base.
  • Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
  • In the drawings:
    • Fig. 1 shows the cross section of the burner unit with visible baffle in the shape of the side wall of a cone, in axonometric view;
    • Fig. 2 depicts the baffle in the shape of the side wall of a cone with round holes and mounting flange, in axonometric view;
    • Fig. 3 shows the baffle as in Fig. 2, in side view;
    • Fig. 4 depicts the baffle as in Fig. 2, in bird's eye view;
    • Fig. 5 shows the baffle in the shape of the side wall of a truncated cone with rectangular holes, closed on the side of the smaller base, featuring a mounting flange on the side of the larger base, in axonometric view;
    • Fig. 6 presents the baffle as in Fig. 5, in side view;
    • Fig. 7 depicts the baffle as in Fig. 5, in bird's eye view;
    • Fig. 8 shows the baffle in the shape of an open dome with square holes, in axonometric view;
    • Fig. 9 depicts the baffle as in Fig. 8, in side view;
    • Fig. 10 presents the baffle as in Fig. 8, in bird's eye view;
    • Fig. 11 depicts the baffle in the shape of the side wall of a truncated pyramid with round holes, closed on the side of the smaller base, in axonometric view;
    • Fig. 12 presents the baffle as in Fig. 11, in side view;
    • Fig. 13 shows the baffle as in Fig. 11, in bird's eye view.
  • In the first exemplary embodiment of the invention (Fig. 1 to Fig. 4), the gas burner unit intended for a heat exchanger incorporates a perforated wall 1 of the burner, air and fuel duct 2, where there is a transverse baffle 3 over the perforated wall 1 of the burner, and further includes the plate 6 of the burner. Fixed to the plate 6 of the burner is the baffle 3, air and fuel duct 2, and perforated wall 1 of the burner. The baffle 3 is given the shape of the side wall of a cone hollow inside (Fig. 2 to Fig. 4), where the apex of the cone points in the direction opposite to the perforated wall 1 of the burner and divides the air and fuel duct 2 into two segments: the segment under the baffle 3 and the one over the baffle 3. The cross section of the segment of the air and fuel duct 2 located within the inner space delimited by the baffle 3 increases towards the perforated wall 1 of the burner. The baffle 3 features round holes 4 through which the air and fuel mix is supplied to the perforated wall 1 of the burner, as well as a mounting flange 5 used to screw the baffle 3 to the plate 6 of the burner.
  • In the second exemplary embodiment of the invention, the burner unit described in the first example incorporates the baffle 3 in the shape of the side wall of a truncated cone (Fig. 5 to Fig. 7) closed with a wall on the side of the smaller base, where the baffle is oriented in the direction opposite to the perforated wall 1 of the burner and divides the air and fuel duct 2 into two segments: the segment under the baffle 3 and the one over the baffle 3. The cross section of the segment of the air and fuel duct 2 located within the inner space delimited by the baffle 3 increases towards the perforated wall 1 of the burner. The baffle 3 features rectangular holes 4 arranged axially, and is fitted with a mounting flange 5 used to screw the baffle 3 to the burner plate 6.
  • In the third exemplary embodiment the burner unit described in example 1 incorporates the baffle 3 in the shape of an open dome (Fig. 8 to Fig. 10), oriented in the direction opposite to the perforated wall 1 of the burner, where the baffle divides the air and fuel duct 2 into two segments: the segment under the baffle 3 and the one over the baffle 3. The cross section of the segment of the air and fuel duct 2 located within the inner space delimited by the baffle 3 increases towards the perforated wall 1 of the burner. The baffle 3 features square holes 4. The baffle 3 is welded to the burner plate 6.
  • In the fourth exemplary embodiment the burner unit described in embodiment one incorporates the baffle 3 in the shape of the side wall of a truncated pyramid (Fig. 11 to Fig. 13) closed with a wall on the side of the smaller base, where the baffle is oriented in the direction opposite to the perforated wall 1 of the burner and divides the air and fuel duct 2 into two segments: the segment under the baffle 3 and the one above the baffle 3. The cross section of the segment of the air and fuel duct 2 located within the inner space delimited by the baffle 3 increases towards the perforated wall 1 of the burner. The baffle 3 features round holes 4. The baffle 3 is welded to the burner plate 6.
  • In all embodiments of the invention the total area of the holes 4 in the baffle 3 accounts for 0.3 to 1.2 of the area of the opening of the fan used to supply the air and fuel mix to the air and fuel duct 2.
  • The air and fuel mix is supplied via the air and fuel duct 3 to the perforated wall 1 of the burner through the holes 4 in the baffle 3. The shape of the baffle 3 and its positioning in the air and fuel duct 2 according to the invention ensures substantial reduction of noise accompanying the work of the burner unit.

Claims (1)

  1. A gas burner unit intended for a heat exchanger, having a perforated burner wall and an air and fuel duct and a fan used to supply an air and fuel mixture to the air and fuel duct, in which air and fuel duct (2), over the perforated burner wall (1), there is a transverse baffle (3) featuring holes (4) and dividing the air and fuel duct (2) into two segments, wherein the baffle is shaped so that the cross section of the segment of the air and fuel duct (2) located between the baffle (3) and perforated burner wall (1) increases along the baffle (3) towards the perforated burner wall (1), wherein the baffle (3) is positioned in the air and fuel duct (2) so that the cross section of the segment of the air and fuel duct (2) located within the inner space delimited by the baffle (3) increases towards the perforated burner wall (1), and wherein the total area of the holes (4) in the baffle (3) accounts for 0.3 to 1.2 of the area of the opening of the fan used to supply the air and fuel mix to the air and fuel duct (2), wherein the gas burner unit further comprises a burner plate (6) to which said baffle (3), air and fuel duct (2), and perforated wall (1) of the burner are fixed, wherein the baffle (3) is fitted with a mounting flange (5) used to screw the baffle (3) to the burner plate (6), and the baffle (3) is given the shape of the side wall of a cone or truncated cone, closed on the side of the smaller base, or shaped into an open dome, or side wall of a pyramid, or side wall of a truncated pyramid, closed on the side of the smaller base.
EP19460016.9A 2018-04-05 2019-04-02 Gas burner unit for a heat exchanger Active EP3550209B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19460016T PL3550209T3 (en) 2018-04-05 2019-04-02 Gas burner unit for a heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL425138A PL236140B1 (en) 2018-04-05 2018-04-05 Gas burner assembly for the heat exchanger

Publications (2)

Publication Number Publication Date
EP3550209A1 EP3550209A1 (en) 2019-10-09
EP3550209B1 true EP3550209B1 (en) 2021-08-25

Family

ID=66655287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19460016.9A Active EP3550209B1 (en) 2018-04-05 2019-04-02 Gas burner unit for a heat exchanger

Country Status (3)

Country Link
EP (1) EP3550209B1 (en)
ES (1) ES2897673T3 (en)
PL (2) PL236140B1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2445378A1 (en) * 1974-09-23 1976-04-29 Rothemuehle Brandt Kritzler Purification of gases - by washing or combustion with regenerative heat exchange between incoming and outgoing streams
JP2623753B2 (en) 1988-08-31 1997-06-25 松下電器産業株式会社 Combustion equipment
JP2000055316A (en) * 1998-08-11 2000-02-22 Tokyo Gas Co Ltd Surface combustion device
GB2404008A (en) * 2003-07-16 2005-01-19 Aeromatix Ltd A burner including a ceramic burner head and an associated baffle
CN201100834Y (en) * 2007-07-31 2008-08-13 邹德升 A confused flow heat exchanger
US10995965B2 (en) * 2013-01-25 2021-05-04 Beckett Gas, Inc. Ultra-low NOx burner
CN109196275B (en) * 2016-05-13 2020-02-04 贝卡尔特燃烧技术股份有限公司 Cylindrical gas premixing burner
RU2738905C2 (en) * 2016-09-09 2020-12-18 Киунгдонг Навиен Ко., Лтд. Tubular assembly for a tubular heat exchanger and a tubular heat exchanger comprising such a pipe assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2897673T3 (en) 2022-03-02
PL3550209T3 (en) 2021-12-06
EP3550209A1 (en) 2019-10-09
PL425138A1 (en) 2019-10-07
PL236140B1 (en) 2020-12-14

Similar Documents

Publication Publication Date Title
EP2976576B1 (en) ULTRA-LOW NOx BURNER
US6145501A (en) Low emission combustion system
US4318688A (en) Oil burner
EP3719386B1 (en) Torch
US20140076307A1 (en) Infrared tube heater
JP2004506167A (en) Spray burner
KR20140051818A (en) High perimeter stability burner
US6755644B2 (en) Method and apparatus for operating gaseous fuel fired heater
CN109196275B (en) Cylindrical gas premixing burner
JP5082505B2 (en) boiler
US6485294B2 (en) NOx reduction device
US6918759B2 (en) Premixed combustion gas burner having separated fire hole units
EP3550209B1 (en) Gas burner unit for a heat exchanger
EP3431872A1 (en) Cylindrical premix gas burner
US6536204B2 (en) Burner configuration for gas turbine
US10955134B2 (en) Burner with variable port area
EP3018408A1 (en) Burner
US20200173689A1 (en) Inward fired low nox premix burner
CN218269055U (en) Combustor and combustion system
EP3587922A1 (en) Gas burner unit for a heat exchanger
EP3865770A2 (en) Ultra-low nox burner
JP2019174015A (en) Surface combustion burner
EP2525150B1 (en) A premix burner
KR102587825B1 (en) Hydrogen gas burner
CN110869671B (en) Optimized burner for boiler applications

Legal Events

Date Code Title Description
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: THE APPLICATION HAS BEEN PUBLISHED

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

AX Request for extension of the european patent

Extension state: BA ME

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: 20200327

RBV Designated contracting states (corrected)

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

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: 20200518

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

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20210423

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: AIC SPOLKA AKCYJNA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

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: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Ref country code: AT

Ref legal event code: REF

Ref document number: 1424165

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210915

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602019007193

Country of ref document: DE

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211125

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211125

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211227

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211126

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2897673

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20220302

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602019007193

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20220527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220402

REG Reference to a national code

Ref country code: AT

Ref legal event code: UEP

Ref document number: 1424165

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210825

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20230426

Year of fee payment: 5

Ref country code: IE

Payment date: 20230425

Year of fee payment: 5

Ref country code: FR

Payment date: 20230425

Year of fee payment: 5

Ref country code: ES

Payment date: 20230511

Year of fee payment: 5

Ref country code: DE

Payment date: 20230428

Year of fee payment: 5

Ref country code: CH

Payment date: 20230509

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20230426

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230425

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20190402

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210825

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20240425

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PL

Payment date: 20240226

Year of fee payment: 6