Burner head, fire grate, and gas device

Abstract

A burner head includes a burner cover provided with a plurality of fire holes that are spaced apart from each other, and a metal mesh provided at the burner cover and covering the plurality of fire holes. A welding spot is provided in a welding region of the metal mesh that corresponds to the plurality of fire holes.

What is claimed is: 
     
         1 . A burner head comprising:
 a burner cover provided with a plurality of fire holes that are spaced apart from each other; and   a metal mesh provided at the burner cover and covering the plurality of fire holes, a welding spot being provided in a welding region of the metal mesh that corresponds to the plurality of fire holes.   
     
     
         2 . The burner head according to  claim 1 , wherein the welding spot is provided at a center of the welding region. 
     
     
         3 . The burner head according to  claim 1 , wherein the welding spot is one of at least two welding spots in the welding region that are randomly spaced and distributed. 
     
     
         4 . The burner head according to  claim 1 , wherein the metal mesh includes a plurality layers welded by the welding spot. 
     
     
         5 . The burner head according to  claim 1 , wherein the metal mesh is provided below the burner cover. 
     
     
         6 . The burner head according to  claim 1 , wherein the burner cover includes:
 a panel provided with a hollow region; and   two side plates respectively connected to two sides, in a width direction, of the panel;   wherein:
 the panel includes a plurality of partition ribs in the hollow region and extending in the width direction of the panel, the plurality of partition ribs being spaced apart from each other in a length direction of the panel to separate the hollow region into the plurality of fire holes; and 
 the metal mesh is provided at back of the panel. 
   
     
     
         7 . The burner head according to  claim 6 , wherein the metal mesh is fixed to the partition ribs by welding. 
     
     
         8 . A fire grate comprising:
 a housing having an airflow channel in the housing; and   the burner head according to  claim 1 , the burner head being provided at a top of the housing and the plurality of fire holes communicating with the airflow channel.   
     
     
         9 . The fire grate according to  claim 8 , wherein the burner cover includes:
 a panel at the top of the housing; and   two side plates provided at two sides, in a width direction, of the panel, the two side plates being inserted in the airflow channel and fixedly connected to an inner wall of the housing.   
     
     
         10 . The fire grate according to  claim 9 , wherein:
 a plurality of recesses are provided at two sides, in a width direction, of the housing, the plurality of recesses being spaced apart from each other along a length direction of the housing, and each of the plurality of recesses abutting and being fixed to a corresponding one of the two side plates; and   the panel is provided with a plurality of partition ribs spaced apart from each other along a length direction of the panel, the plurality of partition ribs being in one-to-one correspondence with the plurality of recesses.   
     
     
         11 . A fire grate comprising:
 a housing having an airflow channel in the housing;   a burner cover at a top of the housing and provided with a plurality of fire holes communicating with the airflow channel; and   a rectification plate in the airflow channel, the rectification plate being below and spaced apart from the burner cover, the rectification plate extending from one end to another, in a length direction, of the housing, the rectification plate being provided with a vent, and a distance between the rectification plate and the burner cover being greater than or equal to 1 mm.   
     
     
         12 . The fire grate according to  claim 11 , wherein the rectification plate has a first region and second regions provided at two ends of the first region in a length direction of the rectification plate, the first region being provided with a plurality of vents, and a unit air passing area of the second region being smaller than a unit air passing area of the first region. 
     
     
         13 . The fire grate according to  claim 12 , wherein an air passing area of the second region is zero. 
     
     
         14 . The fire grate according to  claim 12 , wherein the second region is an opening region, wherein a unit opening area of the second region is smaller than a unit opening area of the first region. 
     
     
         15 . The fire grate according to  claim 14 , wherein:
 the plurality of vents are a plurality of first vents;   the second region is provided with a plurality of second vents spaced apart from each other and distributed along the length direction of the rectification plate; and   a distance between two adjacent second vents gradually increases from a location adjacent to the first region to a location distant from the first region, or an opening area per second vent of the plurality of second vents gradually decreases from the location adjacent to the first region to the location distant from the first region.   
     
     
         16 . The fire grate according to  claim 12 , wherein a length L2 of each of the second regions and a total length L of the rectification plate satisfy 1/7L≤L2≤1/5L. 
     
     
         17 . The fire grate according to  claim 12 , wherein the plurality of vents include a plurality of first sub-vents and a plurality of second sub-vents, an opening area of each of the first sub-vents being different from an opening area of each of the second sub-vents, the plurality of first sub-vents and the plurality of second sub-vents being spaced apart from one another and alternately provided along the length direction of the rectification plate. 
     
     
         18 . The fire grate according to  claim 17 , wherein:
 each two first sub-vents of the plurality of first sub-vents are provided between two adjacent ones of the plurality of second sub-vents, and the two first sub-vents are spaced apart from each other in a width direction of the rectification plate; and   the plurality of second sub-vents are provided at a middle of the rectification plate in the width direction, and an edge of each of the second sub-vents protrudes toward a space between the corresponding two first sub-vents.   
     
     
         19 . The fire grate according to  claim 11 , further comprising:
 a metal mesh provided below the burner cover and covering the plurality of fire holes.   
     
     
         20 . A gas device comprising:
 a fire grate including:
 a housing having an airflow channel in the housing; 
 a burner cover at a top of the housing and provided with a plurality of fire holes communicating with the airflow channel; and 
 a rectification plate in the airflow channel, the rectification plate being below and spaced apart from the burner cover, the rectification plate extending from one end to another, in a length direction, of the housing, the rectification plate being provided with a vent, and a distance between the rectification plate and the burner cover being greater than or equal to 1 mm.