Patent ID: 11920783
Assignee: KYUNGDONG NAVIEN CO., LTD.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 2:
3. The flame-hole structure of claim 2, wherein the protruding portion of the first rich plate includes a first inclined surface and a second inclined surface extending from the adjacent rich plate horizontal-portions so as to be inclined toward the center of the lean flame-hole part along the width direction and a first horizontal surface extending along the lengthwise direction to connect distal ends of the first inclined surface and the second inclined surface,
wherein the bending portion of the first lean plate includes a third inclined surface and a fourth inclined surface extending from the adjacent lean plate horizontal-portions so as to be inclined toward the center of the lean flame-hole part along the width direction and a second horizontal surface extending along the lengthwise direction to connect distal ends of the third inclined surface and the fourth inclined surface, and
wherein the first inclined surface is brought into close contact with the third inclined surface, the second inclined surface is brought into close contact with the fourth inclined surface, and the first horizontal surface is brought into close contact with the second horizontal surface.