Gas-air mixing structure and burner

Abstract

A gas-air mixing structure and a burner, comprising an external supporting structure ( 2 ) arranged in a housing ( 1 ) and a gas array pipe connected to the external supporting structure ( 2 ). An air inlet is connected to one end of the housing ( 1 ). A gas mixing channel is provided between the gas array pipe and a mixed gas outlet. The gas array pipe consists of multiple gas pipes ( 3 ) arranged in an array, the gas pipes ( 3 ) are provided with gas inlets and gas outlets ( 4 ), and the gas outlets ( 4 ) are arranged on the leeward surfaces of the gas pipes ( 3 ). A gas inlet pipe is arranged on the air channel and gas outlet holes ( 4 ) are spaced apart on the leeward surfaces of the gas pipes ( 3 ) to uniformly mix the gas ejected from the gas outlet holes ( 4 ) by utilizing a Coanda effect of air upon a circular pipe.

1 . A gas-air mixing structure, comprising an external supporting structure arranged in a housing and a gas array pipe connected thereto, wherein an air inlet is connected to one end of the housing, a gas mixing channel is arranged between the gas array pipe and a mixed gas outlet, the gas array pipe comprises a plurality of gas pipes arranged in an array manner, each of the plurality of gas pipes is provided with gas inlets and a plurality of gas output holes, and the plurality of gas output holes are provided on the leeward surface of each of the plurality of gas pipes. 
     
     
         2 . The gas-air mixing structure according to  claim 1 , wherein the plurality of gas output holes are provided on the leeward surface of each of the plurality of gas pipes, and each of the plurality of gas output holes is circular hole or slit. 
     
     
         3 . The gas-air mixing structure according to  claim 1 , wherein the sectional area of each of the plurality of gas output holes is 1/20 to ½ of the sectional area of the gas pipe. 
     
     
         4 . The gas-air mixing structure according to  claim 1 , wherein the arrangement manner of the plurality of gas output holes is that several circular holes with a sectional area of 1/10 of the sectional area of the gas pipe are evenly distributed at the center of the leeward surface of each of the gas pipe with a spacing of 5 times the diameter of the circular hole. 
     
     
         5 . The gas-air mixing structure according to  claim 1 , wherein at least one row of gas pipes arranged in an array manner is arranged. 
     
     
         6 . The gas-air mixing structure according to  claim 5 , wherein when the gas pipes are in multiple rows, two adjacent rows are arranged in a staggered manner. 
     
     
         7 . The gas-air mixing structure according to  claim 1 , wherein the external supporting structure and the housing form a gas distribution cavity, the housing of the gas distribution cavity is provided with a gas intake mains, one end of each gas pipe is connected to the gas distribution cavity, or both ends of each gas pipe are connected to the gas distribution cavity. 
     
     
         8 . The gas-air mixing structure according to  claim 7 , wherein the gas distribution cavity has a gas intake structure of annular type, C-shaped type, hollow square type, and single-side type. 
     
     
         9 . A burner, comprising the gas air mixing structure according to  claim 1 .