Cooker Burner

Abstract

The present invention discloses a cooker burner. The cooker burner comprises a base (1), a first ejector passage (3), a plurality of primary air passages (4), a cap (5) and a transfer passage (6), the base (1) has a chamber (11) and at least one first ejector (12); the first ejector passage (3) has a central chamber (311) and a peripheral chamber (312), the peripheral chamber (312) is used for making primary air around the periphery of the central chamber (311) uniform. With the design of the first ejector passage, the gas in the central chamber is more directly mix with the primary air in the peripheral chamber, improving the mixing uniformity and air intake rate around the periphery of the central chamber. Therefore, yellow flame and backfire can be avoided.

1 . A cooker burner, comprising:
 a base ( 1 ) having a chamber ( 11 ) with an upward opening and a first ejector ( 12 ) disposed at the center of the chamber ( 11 );   a connector ( 2 ) disposed on the base ( 1 ), which comprises a plate body ( 21 ) and a first ejector passage ( 3 ) vertically disposed at the center of the plate body ( 21 ), the plate body ( 21 ) having an flange ( 211 ) extending in the horizontal direction to cover the chamber ( 11 );   a plurality of primary air passages ( 4 ) disposed at intervals along the periphery of the connector ( 2 ), enabling introduction of air from the outside into the chamber ( 11 ) of the base ( 1 );   a cap ( 5 ) disposed on the connector ( 2 ), a first gas mixing chamber ( 514 ) at the center and a second gas mixing chamber ( 525 ) surrounding the first gas mixing chamber ( 514 ) respectively defined between the cap ( 5 ) and the connector ( 2 ); the first gas mixing chamber ( 514 ) corresponding to the first ejector passage ( 3 ) to mix the primary air and gas from the first ejector; and   a transfer passage ( 6 ) for transferring the mixed primary air and gas from the first gas mixing chamber ( 514 ) to the second gas mixing chamber ( 525 );   wherein,   the first ejector passage ( 3 ) has a central chamber ( 311 ) located at the center of the first ejector passage ( 3 ) and a peripheral chamber ( 312 ) surrounding the central chamber ( 311 ) and separated from the central chamber ( 311 );   a bottom inlet of the central chamber ( 311 ) is in communication with the chamber ( 11 ) of the base ( 1 ) and faces to the first ejector ( 12 ), and a top outlet of the central chamber ( 311 ) is communicated with the first gas mixing chamber ( 514 );   and a bottom opening of the peripheral chamber ( 312 ) is in communication with the chamber ( 11 ) of the base ( 1 ), and the top of the peripheral chamber ( 312 ) is a closed end ( 33 ).   
     
     
         2 . The cooker burner of  claim 1 , wherein the first ejector passage ( 3 ) is defined by a tubular body having a top opening and a bottom opening, the tubular body comprises an annular inner wall ( 31 ) and an annular outer wall ( 32 ) disposed apart from the inner wall ( 31 ), and the central chamber ( 311 ) is defined inside the inner wall ( 31 ), and the peripheral chamber ( 312 ) is defined between the inner wall ( 31 ) and the outer wall ( 32 ), and top of the inner wall ( 31 ) is connected to the top of the outer wall ( 32 ) forming the closed end ( 33 ). 
     
     
         3 . The cooker burner of  claim 1 , wherein the bottom of the outer wall ( 32 ) of the peripheral chamber ( 312 ) is lower than that of a wall of the central chamber ( 311 ). 
     
     
         4 . The cooker burner of  claim 2 , wherein the cap ( 5 ) has an upwardly facing groove ( 511 ) for receiving the first ejector passage ( 3 ), the groove ( 511 ) and the plate body ( 21 ) forming the first gas mixing chamber ( 514 ), and a lower surface of a top wall of the groove ( 511 ) and a closed end ( 33 ) of the first ejector passage ( 3 ) forming a radial Venturi cavity ( 60 ). 
     
     
         5 . The cooker burner of  claim 4 , wherein the closed end ( 33 ) of the first ejector passage ( 3 ) has a first end face ( 331 ) disposed horizontally and a second end face ( 332 ) slopes downwardly from a lower edge of the first end face ( 331 );
 when the relation among a vertical distance D 1  between the first end face ( 331 ) and the lower surface of the top wall of the groove ( 511 ), a vertical distance D 2  between an upper edge of the second end face ( 332 ) and the lower surface of the top wall of the groove ( 511 ), and a vertical distance D 3  between a lower edge of the second end face ( 332 ) and the lower surface of the top wall of the groove ( 511 ) meets D 1 <D 2 <D 3 , the radial Venturi cavity ( 60 ) is formed.   
     
     
         6 . The cooker burner of  claim 5 , wherein an included angle α between the first end face ( 331 ) and the second end face ( 332 ) is 5°-15°. 
     
     
         7 . The cooker burner of  claim 4 , wherein the cap ( 5 ) has an inner ring portion ( 51 ) and an outer ring portion ( 52 ) concentrically disposed at intervals, and the groove ( 511 ) is disposed inside the inner ring portion ( 51 ) with a top end thereof higher than that of the outer ring portion ( 52 );
 the inner ring portion ( 51 ) has an annular wall ( 512 ) protruding upward and a main cap plate ( 513 ) covering over the annular wall ( 512 ), and a plurality of main flame grooves ( 5121 ) and a plurality of flame holding grooves ( 5122 ) are disposed at intervals along the circumferential direction on the annular wall ( 512 ), and a plurality of main fire ports and flame holding ports respectively in coordination with the outer wall ( 32 ) of the main cap plate ( 513 ).   
     
     
         8 . The cooker burner of  claim 7 , wherein the outer ring portion ( 52 ) has an inner ring wall surface ( 521 ) and an outer ring wall surface ( 522 ) concentrically disposed apart, and a bottom wall ( 523 ) connecting the inner ring wall surface ( 521 ) and the outer ring wall surface ( 522 );
 an auxiliary cap plate ( 524 ) covers over the inner ring wall surface ( 521 ) and the outer ring wall surface ( 522 ), and the inner ring wall surface ( 521 ), the outer ring wall surface ( 522 ), the bottom wall ( 523 ) and the auxiliary cap plate ( 524 ) forming the second gas mixing chamber ( 525 ).   
     
     
         9 . The cooker burner of  claim 8 , wherein a plurality of first main flame branches ( 5221 ) and a plurality of second main flame branches ( 5222 ) are disposed at intervals along an upper surface of the outer ring wall surface ( 522 ), and the first main flame branch ( 5221 ) has a depth greater than that of the second main flame branch ( 5222 ). 
     
     
         10 . The cooker burner of  claim 8 , wherein a plurality of secondary air holes ( 7 ) are disposed at intervals at the periphery of the plurality of main flame grooves ( 5121 ) and the plurality of flame holding grooves ( 5122 ), the secondary air holes ( 7 ) are located on the junction of the inner ring wall surface ( 521 ) and the annular wall ( 512 ), and each secondary air hole ( 7 ) is in communication with the secondary air passage below the cap ( 5 ). 
     
     
         11 . The cooker burner of  claim 10 , wherein each secondary air hole ( 7 ) has a plurality of annular peripheral walls ( 71 ) protruding downward, the annular peripheral walls ( 71 ) are enclosed to form annular chambers, and a plurality of radial secondary air passages ( 40 ) for communicating the annular chambers with the outside are disposed along the circumferential direction of the connector ( 2 );
 the primary air passages ( 4 ) are radially disposed along the circumferential direction of the connector ( 2 ), and the secondary air passages ( 40 ) and the primary air passages ( 4 ) are spaced apart.   
     
     
         12 . The cooker burner of  claim 11 , wherein at least one pair of baffles ( 212 ) are disposed circumferentially and radially along the plate body ( 21 ) extending the lower surface of the plate body ( 21 ) of the connector ( 2 ) downward;
 when each pair of baffles ( 212 ) is placed on the base ( 1 ), a gap is formed between of the baffles ( 212 ) and the base ( 1 ) forms an air inlet of the primary air passage ( 4 ).   
     
     
         13 . The cooker burner of  claim 12 , wherein a notch ( 5211 ) is disposed on the inner ring wall surface ( 521 ) of the outer ring portion ( 52 ), the annular peripheral walls ( 71 ) of the adjacent annular chambers are enclosed forming a cavity, and the notch ( 5211 ) is communicated with the cavity, the notch ( 5211 ) and the cavity together form the transfer passage ( 6 ). 
     
     
         14 . The cooker burner of  claim 7 , wherein a third gas mixing chamber ( 8 ) is fluidly separated from the first gas mixing chamber ( 514 ) and the second gas mixing chamber ( 525 ), and is formed between the annular wall ( 512 ) of the inner ring portion ( 51 ) and the main cap plate ( 513 );
 the chamber ( 11 ) of the base ( 1 ) has at least one second ejector ( 9 ), and at least one second ejector passage ( 10 ) is disposed on the base ( 1 ) and is independent of the first ejector passage ( 3 ), the second ejector passage ( 10 ) is fluidly connected to the base ( 1 ) and the second ejector ( 9 ).   
     
     
         15 . The cooker burner of  claim 14 , wherein at least one through hole ( 50 ) is disposed on an inner circumference of the annular wall ( 512 ) of the inner ring portion ( 51 ) on the top wall of the cap ( 5 ), the through hole ( 50 ) has a convex wall ( 501 ) protruding downward, a chamber formed by enclosing the convex walls ( 501 ) has a top opening through which the fuel mixture in the second ejector passage ( 10 ) enters the third gas mixing chamber ( 8 ). 
     
     
         16 . The cooker burner of  claim 15 , wherein the second ejector passage ( 10 ) is an axial Venturi tube. 
     
     
         17 . The cooker burner of  claim 15 , wherein at least one partition plate ( 20 ) is disposed on the top wall of the cap ( 5 ), the partition plate ( 20 ) partitions the third gas mixing chamber ( 8 ) into two independent chambers ( 201 ,  201 ′), and each independent chamber is in communication with a corresponding second ejector passage ( 10 ). 
     
     
         18 . The cooker burner of  claim 14 , wherein a partition plate ( 30 ) is disposed between the annular wall ( 512 ) protruding upward of the inner ring portion ( 51 ) and the main cap plate ( 513 ), and at least one gas outlet ( 301 ) for the outflow of the fuel mixture mixed in the third gas mixing chamber ( 8 ) is disposed on a top surface of the partition plate ( 30 );
 a first gap ( 302 ) is disposed between a lower surface of the partition plate ( 30 ) and an upper surface of the inner ring portion ( 51 ), and a second gap ( 303 ) is disposed between an upper surface of the partition plate ( 30 ) and the main cap plate ( 513 ), and the second gap ( 303 ) serves as a flame outlet of the inner ring portion ( 51 ).   
     
     
         19 . The cooker burner of  claim 18 , wherein a convex ring ( 510 ) protrudes upward at the center of the upper surface of the inner ring portion ( 51 ), and a mounting hole ( 304 ) is disposed at a corresponding position of the partition plate ( 30 ) and is capable of placing on the convex ring ( 510 );
 an outer edge of the partition plate ( 30 ) abuts against the annular wall ( 512 ), at least two ribs ( 305 ) for supporting the main cap plate ( 513 ) are disposed at intervals on the upper surface of the partition plate ( 30 ) along the circumferential direction, and the main cap plate ( 513 ) extends downward at a position corresponding to the convex ring ( 510 ) forming an annular convex wall ( 5130 ), the annular convex wall ( 5130 ) is capable of running through the mounting hole ( 304 ) and is adapted to the convex ring ( 510 ).