EP3339731B1 - Brûleur à gaz et table de cuisson comprenant un tel brûleur - Google Patents

Brûleur à gaz et table de cuisson comprenant un tel brûleur Download PDF

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Publication number
EP3339731B1
EP3339731B1 EP16205401.9A EP16205401A EP3339731B1 EP 3339731 B1 EP3339731 B1 EP 3339731B1 EP 16205401 A EP16205401 A EP 16205401A EP 3339731 B1 EP3339731 B1 EP 3339731B1
Authority
EP
European Patent Office
Prior art keywords
burner
gas
crown
burner crown
anyone
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.)
Not-in-force
Application number
EP16205401.9A
Other languages
German (de)
English (en)
Other versions
EP3339731A1 (fr
Inventor
Fabio Rasi
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.)
Electrolux Appliances AB
Original Assignee
Electrolux Appliances AB
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
Priority to ES16205401T priority Critical patent/ES2747707T3/es
Application filed by Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to EP16205401.9A priority patent/EP3339731B1/fr
Priority to US16/465,886 priority patent/US20190331337A1/en
Priority to PCT/EP2017/079803 priority patent/WO2018114169A1/fr
Priority to AU2017383864A priority patent/AU2017383864A1/en
Priority to CN201780078491.3A priority patent/CN110088529A/zh
Priority to BR112019012596-5A priority patent/BR112019012596A2/pt
Publication of EP3339731A1 publication Critical patent/EP3339731A1/fr
Application granted granted Critical
Publication of EP3339731B1 publication Critical patent/EP3339731B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/082—Arrangement or mounting of burners on stoves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14062—Special features of gas burners for cooking ranges having multiple flame rings

Definitions

  • the present invention relates to the field of gas burners. More specifically, the present invention relates to a gas burner with multiple flame rings comprising different sizes for providing different heating power levels within a single gas burner.
  • Gas burners are well-known in prior art. Specifically, cooking hob gas burners are known which comprise an injection holder, a burner crown and a burner cap. Said burner crown and burner cap form a combustion gas chamber providing a mixture of gas and primary air to a flame ring comprising a plurality of flame ports.
  • Gas hobs which comprise multiple gas burners of different sizes, specifically, different diameters in order to provide burners with different heating power levels.
  • gas hobs do not provide the possibility to provide heat at multiple high-power, large-sized burners. So, in case that the gas hob comprises four burners and four pieces of cookware should be heated at high-power burners, gas burners have to be used which do not have the desired power level.
  • the invention relates to a gas burner comprising:
  • Each gas injector is associated with one of said pipes for providing gas into said pipes, said pipes being adapted to receive primary air in the area of the injection holder and to provide a combustion mixture of gas and primary air to one of said flame rings of the burner crown assembly.
  • Said gas burner is advantageous because due to the at least three different-sized flame rings said gas burner can provide a small heating power by only powering the smallest flame ring or a higher heating power by powering two or more of said flame rings.
  • the burner crown assembly comprises at least three burner crowns of different sizes wherein a smaller-sized burner crown is at least partially inserted at an upper-side recess of the next-sized burner crown. Said burner crowns may be superimposed or stacked such that an upper burner crown is at least partially received within the recess of a burner crown arranged below. According to an embodiment, said burner crown assembly may be disassembled into multiple burner crowns which have different sizes. Preferably, said burner crowns may be arranged concentrically. The assembled burner crown assembly may comprise a shape according to a truncated cone.
  • a lower wall portion of an upper burner crown provides an upper boundary for the chamber provided within a lower burner crown. So, in other words, the recess provided within a certain burner crown is limited at the top side by a bottom portion of the burner crown arranged above in order to form a gas mixture chamber within the respective burner crown.
  • the chambers are separated from each other with respect to the provision of a combustion mixture of gas and primary air into the respective chamber. So, the combustion gas mixture provided to a certain chamber is not able to flow into another chamber provided above or below. Thereby, said combustion gas mixture can be provided to each flame ring separately
  • each gas injector is coupled with a separate gas inlet.
  • the gas inlet may be, for example, provided at the injection holder. Thereby it is possible to control the provision of gas separately to each chamber, respectively to each flame ring.
  • the burner crown assembly is arranged above the injection holder. So, gas provided by the gas injectors arranged at the injection holder can flow upwardly into the respective chamber in order to be guided by said chamber towards the flame ports of the flame ring which are circumferentially arranged at the respective burner crown.
  • the pipes are arranged at a lateral distance to each other. Thereby it is possible to arrange separate gas injectors below the free end of the pipes in order to provide selectively gas into said pipes.
  • the pipes are arranged next to each other in a straight line. Said arrangement is advantageous because the provision of gas to said pipes is simplified.
  • the arrangement of the gas injectors may be chosen similarly in order to enable a technically simple provision of gas to said pipes.
  • the pipe of the upper burner crown is arranged in the centre of the burner crown assembly. Said configuration is advantageous because the upper burner crown comprises the smallest cross-sectional area and due to the centred arrangement of the pipe, the construction of the burner crown assembly is simplified and a homogenous flame formation at the first flame ring is obtained.
  • the longitudinal axes of the pipes are vertically arranged. Thereby, the gas guided within the pipe can flow upwardly through the pipe thereby being mixed with the primary air sucked at the bottom of the pipe.
  • the chamber of the upper burner crown is covered by a burner cap.
  • Said burner cap may close a recess provided in the upper burner crown in order to form said chamber.
  • each pipe comprises at its bottom an open free end.
  • Said open free end provides an air inlet at which primary air is sucked in in order to be mixed with the gas provided by the gas injector.
  • Said air inlet may be provided below a workplate of the gas burner (also referred to as bottom breather technology).
  • the burner crown assembly comprises at least an upper, a middle and a lower burner crown, wherein the middle burner crown comprise at least one passage for the pipe of the upper burner crown and the lower burner crown comprises at least two passages for the pipes of the upper and middle burner crown.
  • At least the upper burner crown comprises a passage for a spark plug and/or a thermocouple.
  • Said spark plug and/or thermocouple may be arranged within the upper burner crown or in an area between the upper and middle burner crown.
  • the invention refers to a gas hob with a gas burner according to anyone of the preceding embodiments.
  • Fig. 1 illustrates an embodiment of a gas burner 1 in an assembled state
  • Fig. 2 illustrates said gas burner 1 according to an exploded view
  • the gas burner 1 comprises an injector holder 2.
  • Said injector holder 2 may be adapted to be arranged below a work plate of a gas hob. In other words, the injector holder 2 may be integrated in the cooktop.
  • the injector holder 2 comprises gas inlets 2.4, 2.5, 2.6 which are fluidly coupled with gas injectors 2.1, 2.2, 2.3.
  • the injector holder 2 may comprise multiple end faces.
  • the injector holder 2 may comprise a T-like or cross-like shape with a first and a second injector holder portion 2a, 2b and the gas inlets 2.4, 2.5, 2.6 are provided at the free ends of said injector holder portions 2a, 2b.
  • the gas injectors 2.1, 2.2, 2.3 may be arranged at an upper side of the injector holder 2 in order to provide an upwardly directed gas flow.
  • the gas injectors 2.1, 2.2, 2.3 may be arranged next to each other along a straight line.
  • the gas burner 1 comprises a burner crown assembly 3.
  • the burner crown assembly 3 may be adapted to be arranged above the injector holder 2.
  • the burner crown assembly 3 may comprise multiple parts, namely a first burner crown 3.1, in the following also referred to as upper burner crown 3.1, a second burner crown 3.2, in the following also referred to as middle burner crown 3.2 and a third burner crown 3.3, in the following also referred to as lower burner crown 3.3.
  • the burner crowns 3.1, 3.2, 3.3 comprise different sizes, namely the first burner crown 3.1 is the smallest one, the second burner crown 3.2 is greater than the first burner crown 3.1 but smaller than the third burner crown 3.3 and said third burner crown 3.3 is the biggest one.
  • Said burner crowns 3.1, 3.2, 3.3 are adapted to be arranged concentrically and superimposed such that said burner crowns 3.1, 3.2, 3.3 can be stacked one above the other.
  • the second and the third burner crown 3.2, 3.3 comprises a recess 3.2.3, 3.3.3 for receiving a lower portion of the burner crown 3.1, 3.2 arranged above.
  • chambers CH2, CH3 may be obtained in an area between two adjacent burner crowns 3.1, 3.2, 3.3. More in detail, between a lower wall portion of the recess 3.2.3 of the second burner crown 3.2 and a lower wall portion of the first burner crown 3.1, a chamber CH2 may be formed.
  • a further chamber CH3 is built between a lower wall portion of the recess 3.3.3 of the third burner crown 3.3 and a lower wall portion of the second burner crown 3.2.
  • first burner crown 3.1 may comprise a recess 3.1.2 which is closed at its upper side by a burner cap 3.4, thereby forming a chamber CH1 between the first burner crown 3.1 and the burner cap 3.4.
  • Said chambers CH1, CH2, CH3 may be, for example, radial Venturi effect chambers.
  • Said chambers CH1, CH2, CH2 may be stacked on top of one another.
  • each burner crown 3.1, 3.2, 3.3 comprise a flame ring FR1, FR2, FR3.
  • Said flame ring FR1, FR2, FR3 is provided circumferentially at the respective burner crown 3.1, 3.2, 3.3.
  • the flame rings FR1, FR2, FR3 may be arranged in a concentric manner with respect to the middle axis of the gas burner 1, respectively its burner crown assembly 3.
  • the flame rings FR1, FR2, FR3 may be constituted by multiple openings or grooves provided through the circumferential side wall of the burner crowns 3.1, 3.2, 3.3. Said openings or grooves form flame ports of the burner.
  • the burner crown assembly 3 comprises multiple pipes 3.1.1, 3.2.1, 3.3.1 adapted to provide a combustion gas mixture to said chamber CH1, CH2, CH3.
  • Each pipe 3.1.1, 3.2.1, 3.3.1 may be associated with a certain chamber CH1, CH2, CH3.
  • a first pipe 3.1.1 may be adapted to provide said combustion gas mixture to the first chamber CH1
  • a second pipe 3.2.1 may be adapted to provide said combustion gas mixture to the second chamber CH2
  • the third pipe 3.3.1 may be adapted to provide said combustion gas mixture to the third chamber CH3.
  • Said pipe 3.1.1, 3.2.1, 3.3.1 may be Venturi effect pipes.
  • Said pipes 3.1.1, 3.2.1, 3.3.1 may be vertically arranged within the burner crown assembly 3, i.e. the longitudinal axis of the respective pipe 3.1.1, 3.2.1, 3.3.1 is vertically arranged.
  • Said pipe 3.1.1, 3.2.1, 3.3.1 may be, for example, an integral part of the respective burner crown 3.1, 3.2, 3.3.
  • the pipe 3.1.1, 3.2.1, 3.3.1 may protrude at the lower side of the burner crown 3.1, 3.2, 3.3 and may have a first free end arranged within the respective chamber CH1, CH2, CH3 and a further free end arranged below the respective chamber CH1, CH2, CH3.
  • Said further free end may be arranged closely above a gas injector 2.1, 2.2, 2.3.
  • each gas injector 2.1, 2.2, 2.3 may be able to provide an upwardly directed steam of gas into said pipe 3.1.1, 3.2.1, 3.3.1 and said pipe 3.1.1, 3.2.1, 3.3.1 guides the gas into the chamber CH1, CH2, CH3 in which its upper free end is located.
  • the lower free ends of the pipe 3.1.1, 3.2.1, 3.3.1 may be at least partially open in order to be able to suck primary air. Said primary air is mixed within the respective pipe 3.1.1, 3.2.1, 3.3.1 and the chambers CH1, CH2, CH3 in order to provide a combustion gas mixture at the flame rings FR1, FR2, FR3.
  • said pipes 3.1.1, 3.2.1, 3.3.1 are arranged at a distance to each other.
  • the pipe 3.1.1 (fluidly connected with the first, upper chamber CH1) may be arranged in the center of the burner crown assembly 3 and the pipes 3.2.1, 3.3.1 may be arranged at different sides of said pipe 3.1.1.
  • the gas injectors 2.1, 2.2, 2.3 may be arranged at the injection holder 2 such that - in the assembled state of the gas burner 1 - the lower free ends of the pipes 3.1.1, 3.2.1, 3.3.1 are arranged directly above the respective gas injector 2.1, 2.2, 2.3.
  • the second and third burner crown 3.2, 3.3 comprises a passage 3.2.2, 3.3.2 for said pipe(s). More in detail, the third burner crown 3.3 comprises two passages 3.3.2 for pipe 3.1.1 and pipe 3.2.1.
  • the second burner crown 3.2 comprises a single passage 3.2.2 for pipe 3.1.1.
  • Said passages 3.2.2, 3.3.2 may be arranged coaxially with the gas injectors 2.2, 2.3.
  • the burner crows 3.1, 3.2, 3.3 can be arranged one above another and the pipes 3.1.1, 3.2.1 pass through the respective passages 3.2.2, 3.3.2.
  • the gas burner 1 provides multiple gas burner stages with different heating power.
  • small-sized flame ring FR1 may provide lower heating power than flame ring FR2 and flame ring FR2 may provide lower heating power than flame ring FR3.
  • the gas burner may be adapted to be driven according to a three-stage power concept, namely a lower power stage in which only the first flame ring FR1 is active, a medium power stage in which the first and the second flame ring FR1, FR2 is active, and a maximum power level in which all flame rings FR1, FR2, FR3 are active.
  • the heating power of the lower power stage may be, for example, in the range of 0.3KW to 1KW
  • the medium power stage may be, for example, in the range of 1.6KW to 2.5KW
  • the maximum power stage may be, for example, in the range of 1.6KW to 4KW.
  • the burner cap 4 may be a single piece element made of drawn sheet metal, e.g. of steel, aluminum, brass, stainless steel, sintered steel or other suitable metal alloys.
  • the burner crowns 3.1, 3.2, 3.3 may be preferably made of aluminum.
  • the gas burner may comprise even more than three flame rings, respectively, burner crowns, e.g. four or five flame rings/ burner crowns.

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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)

Claims (13)

  1. Brûleur à gaz comprenant :
    un porte-injecteur (2) comportant au moins trois injecteurs de gaz (2.1, 2.2, 2.3) ;
    un ensemble couronne de brûleur (3), l'ensemble couronne de brûleur (3) comprenant au moins trois anneaux brûleurs (FR1, FR2, FR3) de différentes tailles, l'ensemble couronne de brûleur (3) comprenant en outre au moins trois chambres (CH1, CH2, CH3) et au moins trois tuyaux (3.1.1, 3.2.1, 3.3.1), chaque tuyau (3.1.1, 3.2.1, 3.3.1) étant en couplage hydraulique avec une seule chambre (CH1, CH2, CH3) ;
    dans lequel chaque injecteur de gaz (2.1, 2.2, 2.3) est associé à l'un desdits tuyaux (3.1.1, 3.2.1, 3.3.1) pour fournir du gaz dans lesdits tuyaux (3.1.1, 3.2.1, 3.3.1), lesdits tuyaux (3.1.1, 3.2.1, 3.3.1) étant conçus pour recevoir un air primaire dans la zone du porte-injecteur (2) et pour fournir un mélange de combustion de gaz et d'air primaire à l'un desdits anneaux brûleurs (FR1, FR2, FR3) de l'ensemble couronne de brûleur (3),
    dans lequel l'ensemble couronne de brûleur (3) comprend au moins trois couronnes de brûleur (3.1, 3.2, 3.3) de différentes tailles,
    dans lequel une couronne de brûleur de taille plus petite (3.1, 3.2) est au moins partiellement insérée dans un renfoncement du côté supérieur de la couronne de brûleur de la taille suivante (3.2, 3.3),
    caractérisé en ce que
    une partie de paroi inférieure d'une couronne de brûleur supérieure (3.1, 3.2) produit une limite supérieure pour la chambre (CH2, CH3) placée à l'intérieur d'une couronne de brûleur inférieure (3.2, 3.3) .
  2. Brûleur à gaz selon la revendication 1, dans lequel les chambres (CH1, CH2, CH3) sont séparées les unes des autres en relation avec la fourniture d'un mélange de combustion de gaz et d'air primaire dans la chambre respective (CH1, CH2, CH3) de sorte que le mélange de gaz de combustion fourni à une certaine chambre ne peut pas circuler dans une autre chambre placée au-dessus ou au-dessous.
  3. Brûleur à gaz selon l'une quelconque des revendications précédentes, dans lequel chaque injecteur de gaz (2.1, 2.2, 2.3) est couplé à une entrée de gaz séparée (2.4, 2.5, 2.6).
  4. Brûleur à gaz selon l'une quelconque des revendications précédentes, dans lequel l'ensemble couronne de brûleur (3) est disposé au-dessus du porte-injecteur (2) .
  5. Brûleur à gaz selon l'une quelconque des revendications précédentes, dans lequel les tuyaux (3.1.1, 3.2.1, 3.3.1) sont disposés à une certaine distance latérale les uns des autres.
  6. Brûleur à gaz selon l'une quelconque des revendications précédentes, dans lequel les tuyaux (3.1.1, 3.2.1, 3.3.1) sont disposés les uns à côté des autres en ligne droite.
  7. Brûleur à gaz selon l'une quelconque des revendications précédentes, dans lequel le tuyau (3.1.1) de la couronne de brûleur supérieure (3.1) est disposé au centre de l'ensemble couronne de brûleur (3).
  8. Brûleur à gaz selon l'une quelconque des revendications précédentes, dans lequel les axes longitudinaux des tuyaux (3.1.1, 3.2.1, 3.3.1) sont disposés verticalement.
  9. Brûleur à gaz selon l'une quelconque des revendications précédentes, dans lequel la chambre (CH1) de la couronne de brûleur supérieure (3.1) est recouverte d'un chapeau de brûleur (3.4).
  10. Brûleur à gaz selon l'une quelconque des revendications précédentes, dans lequel chaque tuyau (3.1.1, 3.2.1, 3.3.1) comprend dans sa partie inférieure une extrémité libre ouverte.
  11. Brûleur à gaz selon l'une quelconque des revendications précédentes, dans lequel l'ensemble couronne de brûleur (3) comprend au moins une couronne de brûleur supérieure, une intermédiaire et une inférieure (3.1, 3.2, 3.3), dans lequel la couronne de brûleur intermédiaire (3.2) comprend au moins un passage (3.2.2) pour le tuyau (3.1.1) de la couronne de brûleur supérieure (3.1) et la couronne de brûleur inférieure (3.3) comprend au moins deux passages (3.2.2, 3.3.2) pour les tuyaux (3.1.1, 3.2.1) des couronnes de brûleur supérieure et intermédiaire (3.1, 3.2).
  12. Brûleur à gaz selon l'une quelconque des revendications précédentes, dans lequel l'au moins une couronne de brûleur supérieure (3.1) comprend un passage pour une bougie d'allumage (4) et/ou un thermocouple (5).
  13. Table de cuisson comprenant un brûleur à gaz (1) selon l'une quelconque des revendications précédentes.
EP16205401.9A 2016-12-20 2016-12-20 Brûleur à gaz et table de cuisson comprenant un tel brûleur Not-in-force EP3339731B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP16205401.9A EP3339731B1 (fr) 2016-12-20 2016-12-20 Brûleur à gaz et table de cuisson comprenant un tel brûleur
ES16205401T ES2747707T3 (es) 2016-12-20 2016-12-20 Quemador de gas y encimera de cocción que comprende un quemador de gas
PCT/EP2017/079803 WO2018114169A1 (fr) 2016-12-20 2017-11-20 Brûleur à gaz et plaque de cuisson dotée d'un brûleur à gaz
AU2017383864A AU2017383864A1 (en) 2016-12-20 2017-11-20 Gas burner and hob comprising a gas burner
US16/465,886 US20190331337A1 (en) 2016-12-20 2017-11-20 Gas burner and hob comprising a gas burner
CN201780078491.3A CN110088529A (zh) 2016-12-20 2017-11-20 燃气燃烧器以及包括燃气燃烧器的灶具
BR112019012596-5A BR112019012596A2 (pt) 2016-12-20 2017-11-20 queimador de gás e placa vitrocerâmica de cozimento

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16205401.9A EP3339731B1 (fr) 2016-12-20 2016-12-20 Brûleur à gaz et table de cuisson comprenant un tel brûleur

Publications (2)

Publication Number Publication Date
EP3339731A1 EP3339731A1 (fr) 2018-06-27
EP3339731B1 true EP3339731B1 (fr) 2019-07-24

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EP16205401.9A Not-in-force EP3339731B1 (fr) 2016-12-20 2016-12-20 Brûleur à gaz et table de cuisson comprenant un tel brûleur

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US (1) US20190331337A1 (fr)
EP (1) EP3339731B1 (fr)
CN (1) CN110088529A (fr)
AU (1) AU2017383864A1 (fr)
BR (1) BR112019012596A2 (fr)
ES (1) ES2747707T3 (fr)
WO (1) WO2018114169A1 (fr)

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BR112019012596A2 (pt) 2019-11-19
ES2747707T3 (es) 2020-03-11
EP3339731A1 (fr) 2018-06-27
US20190331337A1 (en) 2019-10-31
WO2018114169A1 (fr) 2018-06-28
CN110088529A (zh) 2019-08-02
AU2017383864A1 (en) 2019-05-23

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