Gas burner and hob comprising a gas burner

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 ( 3 ) comprising at least three flame rings (FR 1 , FR 2 , FR 3 ) with different sizes, the burner crown assembly ( 3 ) further comprising at least three chambers (CH 1 , CH 2 , CH 3 ) and at least three pipes ( 3.1.1, 3.2.1, 3.3.1 ), each pipe ( 3.1.1, 3.2.1, 3.3.1 ) being fluidly coupled with a single chamber (CH 1 , CH 2 , CH 3 ); wherein each gas injector ( 2.1, 2.2, 2.3 ) is associated with one of said pipes ( 3.1.1, 3.2.1, 3.3.1 ) for providing gas into said pipe ( 3.1.1, 3.2.1, 3.3.1 ), said pipe ( 3.1.1, 3.2.1, 3.3.1 ) being adapted to receive primary air in the area of the injection holder ( 2 ) and to provide a combustion mixture of gas and primary air to one of said flame rings (FR 1 , FR 2 , FR 3 ) of the burner crown assembly ( 3 ).

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 a respective one of said pipes for providing gas into said 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; 
       the burner crown assembly further comprising at least three burner crowns of different sizes wherein a smaller-sized one of said burner crowns is at least partially inserted at an upper-side recess of the next-sized burner crown; a lower wall portion of an upper said burner crown providing an upper boundary for the chamber provided within a said lower burner crown. 
     
     
         2 - 3 : (canceled) 
     
     
         4 . Gas burner according to  claim 1 , wherein 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. 
     
     
         5 . Gas burner according to  claim 1 , wherein each said gas injector is coupled with a separate gas inlet. 
     
     
         6 . Gas burner according to  claim 1 , wherein the burner crown assembly is arranged above the injection holder. 
     
     
         7 . Gas burner according to  claim 1 , wherein the pipes are arranged at a lateral distance to each other. 
     
     
         8 . Gas burner according to  claim 1 , wherein the pipes are arranged next to each other in a straight line. 
     
     
         9 . Gas burner according to  claim 1 , wherein the pipe of the upper burner crown is arranged in a centre of the burner crown assembly. 
     
     
         10 . Gas burner according to  claim 1 , wherein longitudinal axes of the pipes are vertically arranged. 
     
     
         11 . Gas burner according to  claim 1 , wherein the chamber of the upper burner crown is covered by a burner cap. 
     
     
         12 . Gas burner according to  claim 1 , wherein each said pipe comprise at its bottom an open free end. 
     
     
         13 . Gas burner according to  claim 1 , wherein the burner crown assembly comprises at least an upper, a middle and a lower said 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 crowns. 
     
     
         14 . Gas burner according to  claim 1 , wherein at least the upper burner crown comprises a passage for a spark plug and/or a thermocouple. 
     
     
         15 . Cooking hob comprising the gas burner according to  claim 1 .