Chimney

Abstract

A chimney, including: a chimney cylinder, and a smoke inlet. The smoke inlet is arranged on a lower part of the chimney cylinder, and includes a first side wall and a second side wall on a cross-section of the chimney cylinder. An angle α is formed between the first side wall and a first tangent at an intersection of the first side wall and an outer wall of the chimney cylinder, and 10°≦α≦90°. An angle β is formed between the second side wall and a second tangent at an intersection of the second side wall and the outer wall of the chimney cylinder, and 10°≦β≦90°.

The invention claimed is: 
     
         1 . A chimney, comprising:
 a) a chimney cylinder ( 1 ) comprising an outer wall, and   b) a smoke inlet ( 2 ), said smoke inlet ( 2 ) arranged on a lower part of said chimney cylinder ( 1 ) and comprising a first side wall (B) and a second side wall (C) on a cross-section of said chimney cylinder ( 1 );   
       wherein
 an angle α is formed between said first side wall (B) and a first tangent at an intersection of said first side wall (B) and said outer wall, and 10°≦α≦90°; and 
 an angle β is formed between said second side wall (C) and a second tangent at an intersection of said second side wall (C) and said outer wall, and 10°≦β≦90°. 
 
     
     
         2 . The chimney of  claim 1 , wherein said first side wall (B) and said second side wall (C) are formed by chamfering a part of two side walls (B′, C′) of a conventional smoke inlet. 
     
     
         3 . The chimney of  claim 1 , wherein said first side wall (B) and said second side wall (C) are formed by constructing a new wall ( 4 ) having a certain thickness next to two side walls (B′, C′) of a conventional smoke inlet, and chamfering a part of said new wall ( 4 ). 
     
     
         4 . The chimney of  claim 1 , wherein 20°≦α≦85°, and 20°≦β≦85°. 
     
     
         5 . The chimney of  claim 3 , wherein a groove is arranged on a lower side wall of said smoke inlet ( 2 ). 
     
     
         6 . The chimney of  claim 1 , wherein
 a baffle ( 3 ) is arranged on at least one side wall of said smoke inlet ( 2 );   said baffle ( 3 ) comprises two ends, one end is fixed on an inner wall, said outer wall, or a position between said inner wall and said outer wall of said chimney cylinder ( 1 ), and the other end extends inside said chimney cylinder ( 1 ); and   said baffle ( 3 ) is a straight plate, a folded plate, an arc plate, or a curved plate.   
     
     
         7 . The chimney of  claim 5 , wherein
 a baffle ( 3 ) is arranged on at least one side wall of said smoke inlet ( 2 );   said baffle ( 3 ) comprises two ends, one end is fixed on an inner wall, said outer wall, or a position between said inner wall and said outer wall of said chimney cylinder ( 1 ), and the other end extends inside said chimney cylinder ( 1 ); and   said baffle ( 3 ) is a straight plate, a folded plate, an arc plate, or a curved plate.   
     
     
         8 . The chimney of  claim 6 , wherein
 a plane (b) is limited by the end of said baffle ( 3 ) fixed on said chimney cylinder ( 1 ) and the other end of said baffle ( 3 );   an angle γ is formed between said plane (b) and a perpendicular line (d) of a tangent at a position where said baffle ( 3 ) is fixed; and   said angle γ is between 0° and 80°.   
     
     
         9 . The chimney of  claim 7 , wherein
 a plane (b) is limited by the end of said baffle ( 3 ) fixed on said chimney cylinder ( 1 ) and the other end of said baffle ( 3 );   an angle γ is formed between said plane (b) and a perpendicular line (d) of a tangent at a position where said baffle ( 3 ) is fixed; and   said angle γ is between 0° and 80°.   
     
     
         10 . The chimney of  claim 8 , wherein said angle γ is between 0° and 70°. 
     
     
         11 . The chimney of  claim 9 , wherein said angle γ is between 0° and 70°. 
     
     
         12 . The chimney of  claim 6 , wherein said baffle ( 3 ) is an arc protruding towards a center of said chimney cylinder ( 1 ). 
     
     
         13 . The chimney of  claim 7 , wherein said baffle ( 3 ) is an arc protruding towards a center of said chimney cylinder ( 1 ). 
     
     
         14 . The chimney of  claim 1 , wherein a cross-section of said smoke inlet ( 2 ) in a radial direction is in a shape of a polygon, a circle, or an ellipse. 
     
     
         15 . The chimney of  claim 5 , wherein a cross-section of said smoke inlet ( 2 ) in a radial direction is in a shape of a polygon, a circle, or an ellipse. 
     
     
         16 . The chimney of  claim 7 , wherein a cross-section of said smoke inlet ( 2 ) in a radial direction is in a shape of a polygon, a circle, or an ellipse.