Burner and cooking appliance having burner

Abstract

A burner and a cooking appliance having a burner are provided. The burner may include a burner body having a gas flow path, and a flame hole portion open in the burner body. The flame hole portion may be connected to the gas flow path, and include a first flame hole array with multiple flame holes in a first direction, and include a second flame hole array spaced apart from the first flame hole array in a circumferential direction of the burner body. A pair of first array main flame holes may be repeatedly arranged in the first flame hole array. An auxiliary flame hole may be provided between the pair of first array main flame holes with a diameter smaller than a diameter of the main flame holes. The multiple flame hole arrays provide a high firepower to improve a heating efficiency of the burner.

What is claimed is: 
     
         1 . A burner, comprising:
 a burner body in which a gas flow path is formed; and   a flame hole portion in the form of openings provided in the burner body and connected to the gas flow path to spout gas, wherein the flame hole portion comprises:
 a first flame hole array in which multiple flame holes are arranged in a first direction; and 
 a second flame hole array in which multiple flame holes are arranged in the first direction, the second flame hole array being spaced apart from the first flame hole array in a circumferential direction of the burner body, wherein the first flame hole array comprises a pair of first array main flame holes spaced apart from each other, the pair of first array main flame holes being arranged repeatedly, wherein an auxiliary flame hole is provided between each of the pair of first array main flame holes, and wherein the auxiliary flame hole has a diameter smaller than a diameter of each of the pair of first array main flame holes. 
   
     
     
         2 . The burner of  claim 1 , wherein the second flame hole array comprises a pair of second array main flame holes arranged repeatedly, and wherein a secondary air inflow path is formed between the pair of second array main flame holes to extend to the auxiliary flame hole along a surface of the burner body. 
     
     
         3 . The burner of  claim 1 , wherein the second flame hole array comprises a pair of second array main flame holes arranged repeatedly, and wherein an interval between the pair of second array main flame holes is equal to an interval between the pair of first array main flame holes. 
     
     
         4 . The burner of  claim 1 , wherein the burner body is in the form of a linear tube that extends in the first direction, and wherein the flame hole portion extends in the first direction along a surface of the burner body. 
     
     
         5 . The burner of  claim 1 , wherein a circumferential distance between the first flame hole array and the second flame hole array is shorter than an interval between the pair of first array main flame holes. 
     
     
         6 . The burner of  claim 1 , wherein an interval between the pair of first array main flame holes and another adjacent pair of first array main flame holes is shorter than an interval between the two main flame holes of the pair of first array main flame holes. 
     
     
         7 . The burner of  claim 1 , wherein the burner body comprises a third flame hole array spaced apart from the first flame hole array in the circumferential direction of the burner body, wherein the third flame hole array comprises multiple flame holes arranged in the first direction, and wherein the third flame hole array is arranged opposite to the second flame hole array with the first flame hole array located therebetween. 
     
     
         8 . The burner of  claim 7 , wherein the flame hole portion comprises multiple flame hole sets arranged repeatedly along the burner body, wherein the multiple flame hole sets comprise:
 a pair of first array main flame holes of the first flame hole array;   a pair of second array main flame holes of the second flame hole array;   a pair of third array main flame holes of the third flame hole array; and   an auxiliary flame hole arranged between the pair of first array main flame holes.   
     
     
         9 . The burner of  claim 8 , wherein the first array main flame holes, the second array main flame holes, and the third array main flame holes have a same diameter. 
     
     
         10 . The burner of  claim 8 , wherein each first array main flame hole, each second array main flame hole, and each third array main flame hole are respectively arranged on one imaginary curved line extending in the circumferential direction of the burner body. 
     
     
         11 . The burner of  claim 8 , wherein the multiple flame hole sets are each symmetrical about at least one of a vertical axis or a lateral axis based on the auxiliary flame hole. 
     
     
         12 . The burner of  claim 1 , wherein, based on a center portion of the gas flow path, an angle between the first flame hole array and the second flame hole array is between 15 and 25 degrees in the circumferential direction of the burner body. 
     
     
         13 . The burner of  claim 1 , wherein an interval between one of the pair of first array main flame holes and the auxiliary flame hole is shorter than an interval between the pair of first array main flame holes and another adjacent pair of first array main flame holes. 
     
     
         14 . The burner of  claim 1 , wherein the burner body comprises:
 a first region facing a heated region in which flames are generated from the flame hole portion; and   a second region having a phase different of 180 degrees from the first region, wherein the flame hole portion is arranged in the first region.   
     
     
         15 . The burner of  claim 1 , wherein the burner body comprises an ignition flame hole arranged closer to an ignition device than the flame hole portion, and wherein the ignition flame hole is provided on an imaginary extension line that extends from the first flame hole array. 
     
     
         16 . A cooking appliance comprising the burner of  claim 1 . 
     
     
         17 . The cooking appliance of  claim 16 , wherein the burner body is configured to be arranged at a lower portion of a bottom of a cooking chamber of the cooking appliance, and wherein the first flame hole array is configured to be open in a direction parallel to the bottom of the cooking chamber. 
     
     
         18 . A cooking appliance, comprising:
 a frame in which a cooking chamber is provided;   a circulation device arranged in the frame and having a circulation chamber that communicates with the cooking chamber; and   a heating device arranged outside of the frame and configured to supply heated air to the circulation chamber, wherein the heating device comprises:
 a burner case arranged at a lower portion of the circulation device and having a combustion chamber therein, the combustion chamber being connected to the circulation chamber; and 
 a burner arranged in the combustion chamber and having a flame hole portion that spouts gas, wherein the flame hole portion comprises:
 a first flame hole array in which multiple flame holes are arranged in a first direction; and 
 a second flame hole array in which multiple flame holes are arranged in the first direction, which is spaced apart from the first flame hole array in a circumferential direction of the burner, wherein the first flame hole array comprises a pair of first array main flame holes spaced apart from each other, the pair of first array main flame holes being arranged repeatedly, and wherein an auxiliary flame hole is arranged between each of the pair of first array main flame holes and has a diameter smaller than a diameter of each of the pair of first array main flame holes. 
 
   
     
     
         19 . The cooking appliance of  claim 18 , wherein the circulation chamber provides an upper flow path connected to the cooking chamber, wherein the combustion chamber provides a lower flow path through which air heated by the burner is transferred to the upper flow path, wherein the upper flow path and the lower flow path are connected to each other in a vertical direction, and wherein the flame hole portion is open toward the lower flow path. 
     
     
         20 . The cooking appliance of  claim 19 , further comprising:
 an outer case that contains the frame, wherein the heating device comprises a first inlet open toward a surface of the burner, and a second inlet provided between the heating device and the outer case and connected to the combustion chamber, and wherein secondary air is supplied through the second inlet to the flame hole portion.