Gas combustion device

Abstract

A gas combustion device 1 has a combustor 7 for burning supplied combustion gas therein, an ejector 3 with a primary air hole for sucking a primary air due to ejector effect, and an ignitor 5 for igniting mixed gas injected from a wick 25 provided ahead of the ejector 3. The combustor 7 has a primary combustion chamber 11 for igniting and burning the mixed gas injected from the wick 25 therein, a secondary air hole 33 for supplying a secondary air to the gas burning after ignition, a secondary combustion chamber 13 for further burning the gas burnt in the primary combustion chamber 11 therein, and a tertiary air hole 35 for supplying a tertiary air to the gas burning in the secondary combustion chamber 13. Even when the amount of the primary air is increased, thereby improving ignitability of the mixed gas, since the secondary air is supplied to the gas after ignition in the primary combustion chamber 11, combustion performance of the gas is improved.

1 . A gas combustion device comprising: 
 a combustor for burning combustion gas supplied from a gas source;    a gas passage for sending the gas supplied from the gas source to the combustor;    an ejector with a primary air hole for sucking a primary air due to negative pressure generated by flow speed of the combustion gas supplied to the combustor in the gas passage;    an ignitor for igniting mixed gas injected from a wick provided ahead of the ejector;    a primary combustion chamber provided in the combustor for igniting and burning the mixed gas injected from the wick therein;    a secondary air hole provided in the combustor for supplying a secondary air to the gas burnt after ignition in the primary combustion chamber;    a secondary combustion chamber for mixing the gas burnt in the primary combustion chamber with the secondary air sucked from the secondary air hole and further burning the mixed gas therein; and    a tertiary air hole for supplying a tertiary air to the gas burnt in the secondary combustion chamber.    
   
   
       2 . A gas combustion device of  claim 1 , wherein the diameter of the primary air hole is made small to improve ignitability of the mixed gas injected from the wick.  
   
   
       3 . A gas combustion device of  claim 1  or  2 , wherein the secondary air hole is provided at the position other than an ignition point, at which the secondary air is supplied to the combustion gas.