Gas burner and hob comprising a gas burner

Patent metadata

Field	Value
Publication number	US-11268700-B2
Application number	US-201816626611-A
Country	US
Kind code	B2
Filing date	Jun 25, 2018
Priority date	Jul 7, 2017
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

The invention relates to a gas burner comprising: —an injection holder (2) with at least three gas injectors (2.1, 2.2, 2.3); —a burner crown assembly (3), the burner crown assembly comprising at least three flame rings (FR1, FR2, FR3) with different sizes, the burner crown assembly further comprising at least three chambers (CH1, CH2, CH3) and at least three pipes (3.1.1, 3.1.2, 3.1.3), each pipe being fluidly coupled with a single chamber; wherein each gas injector is associated with one of said pipes for providing gas into said pipe, said pipe 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. In addition, adjacent flame rings are separated from each other based on an air gap (AG1, AG2) provided between said adjacent flame rings.

First claim

The invention claimed is:

1. Gas burner comprising:
an injection holder with at least three gas injectors;
a burner crown assembly comprising at least three flame rings with different sizes, the burner crown assembly further comprising at least three chambers and at least three pipes, each said pipe being fluidly coupled with a single one of said chambers;
wherein each said gas injector is associated with one of said pipes for providing gas into the respective pipe, each said pipe being adapted to receive primary air in an 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, wherein adjacent ones of said flame rings are separated from each other based on a respective air gap provided between said adjacent flame rings; and
wherein said flame rings are formed by one or more flame spreaders, wherein each said flame spreader or a flame spreader portion thereof comprises a protrusion protruding into the associated chamber in order to reduce a height of the associated chamber based on said protrusion, a length of the protrusion being less than a circumference of the flame spreader.

2. The gas burner according to claim 1 , wherein each said air gap comprises an annular shape and is concentrically arranged with respect to said flame rings.

3. The gas burner according to claim 1 , wherein said burner crown assembly enables an air flow below an outer one of said chambers in order to provide air to said air gaps.

4. The gas burner according to claim 1 , wherein said burner crown assembly comprises a burner crown base portion on which at least one flame spreader building said flame rings is based.

5. The gas burner according to claim 4 , wherein said burner crown base portion comprises wall portions for separating said chambers from said air gaps.

6. The gas burner according to claim 5 , wherein said wall portions are concentrically arranged in order to form said chambers as concentric annular chambers.

7. The gas burner according to claim 1 , wherein said pipes protrude downwardly from said burner crown base portion.

8. The gas burner according to claim 1 , wherein said protrusion is located at a position within the associated chamber at which said pipe providing said combustion mixture of gas and primary air into said chamber is arranged.

9. The gas burner according to claim 1 , wherein each said gas injector is coupled with a separate gas inlet.

10. The gas burner according to claim 1 , wherein the burner crown assembly is arranged above the injection holder.

11. The gas burner according to claim 1 , wherein the pipes are arranged at a lateral distance to each other.

12. The gas burner according to claim 1 , wherein longitudinal axes of the pipes are vertically arranged and/or each pipe comprises at its bottom an open free end.

13. The gas burner according to claim 1 , wherein a spark plug and/or a thermocouple is provided in the air gap between an inner one of said flame rings and a further one of said flame rings adjacent to said inner flame ring.

14. Cooking hob comprising the gas burner according to claim 1 .

15. The gas burner according to claim 11 , said pipes being arranged next to each other in a straight line.

16. A gas burner comprising an injection holder comprising first, second and third gas inlets fluidly coupled respectively to first, second and third gas injectors, and a burner crown assembly comprising a base portion and a plurality of flame spreaders;
said base portion defining first, second and third chambers isolated from one another;
a first pipe providing fluid communication between said first gas injector and said first chamber, a second pipe providing fluid communication between said second gas injector and said second chamber, and a third pipe providing fluid communication between said third gas injector and said third chamber;
said plurality of flame spreaders comprising first, second and third flame spreaders covering and thereby confining the respective first, second and third chambers defined in said base portion, each said flame spreader having a respective plurality of flame ports disposed about a circumference thereof and adapted to provide respective first, second and third flame rings;
said first, second and third chambers, and likewise said first, second and third flame spreaders, being concentric and radially spaced from one another defining respective first and second air gaps therebetween, such that said first flame spreader and first chamber are located at a center of said burner crown assembly and are circular, said second flame spreader and second chamber are located radially outward thereof and spaced therefrom by said first air gap and are ring shaped, and said third flame spreader and third chamber are located radially outward thereof and spaced therefrom by said second air gap and are ring shaped;
said burner being adapted to be operated in a low-power mode wherein combustible gas is fed via a first gas pathway from said first gas inlet, through said first injector and first pipe into said first chamber, and then eluted and combusted via the flame ports defining said first flame ring of said first flame spreader;
said burner being further adapted to be operated in a maximum-power mode wherein combustible gas is fed through:
said first gas pathway,
a second gas pathway from said second gas inlet, through said second injector and second pipe into said second chamber, and is then eluted and combusted via the flame ports defining said second flame ring of said second flame spreader, and
a third gas pathway from said third gas inlet, through said third injector and third pipe into said third chamber, and is then eluted and combusted via the flame ports defining said third flame ring of said third flame spreader; and

said burner being further adapted to operate in an intermediate-power mode wherein combustible gas is fed through only said first and second gas pathways.

17. The gas burner of claim 16 , said first, second and third pipes all extending vertically upward and being further arranged along a common plane, said first, second and third pipes having respective lower free ends aligned with and disposed above the respective first, second and third gas injectors and being further adapted to suck primary air therein to be mixed with combustible gas received form the gas injectors in order to yield respective combustion mixtures delivered to the first, second and third chambers, respectively.

18. The gas burner of claim 17 , said air gaps being adapted to facilitate a flow of secondary air therethrough in order to enhance combustion at the adjacent flame rings.

19. Gas burner comprising:
an injection holder with at least three gas injectors;
a burner crown assembly comprising at least three flame rings with different sizes, the burner crown assembly further comprising at least three chambers and at least three pipes, each said pipe being fluidly coupled with a single one of said chambers;
wherein each said gas injector is associated with one of said pipes for providing gas into the respective pipe, each said pipe 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, wherein adjacent ones of said flame rings are separated from each other based on a respective air gap provided between said adjacent flame rings,
each said pipe extending vertically upward and being further arran

Assignees

• Electrolux Appliances AB

Inventors

• Uribe Areli

Classifications

• F23D14/06 Primary

  with radial outlets at the burner head · CPC title

• F24C3/085 Primary

  on ranges · CPC title

• F23L9/00

  Passages or apertures for delivering secondary air for completing combustion of fuel  (baffles or deflectors in air inlets F23M9/02) · CPC title

• F23D2208/00

  Control devices associated with burners · CPC title

• F23D2900/14062

  for cooking ranges having multiple flame rings · CPC title