US 12,281,818 B2
Wavy smoke tube structure of boiler
Sung-Hwan Choi, Seoul (KR)
Appl. No. 17/613,428
Filed by Sung-Hwan Choi, Seoul (KR)
PCT Filed May 15, 2020, PCT No. PCT/KR2020/006428
§ 371(c)(1), (2) Date Nov. 22, 2021,
PCT Pub. No. WO2020/235879, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 10-2019-0059663 (KR), filed on May 21, 2019.
Prior Publication US 2022/0316759 A1, Oct. 6, 2022
Int. Cl. F24H 9/00 (2022.01); F24H 1/28 (2022.01); F28F 1/06 (2006.01); F28F 13/08 (2006.01)
CPC F24H 9/0031 (2013.01) [F24H 1/285 (2013.01); F28F 1/06 (2013.01); F28F 13/08 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A wavy smoke tube structure of a boiler, comprising:
a main body formed in a columnar shape and having a space therein;
a plurality of first concave portions concavely formed along a first side portion in a longitudinal direction of the main body;
a plurality of second concave portions concavely formed along a second side portion in the longitudinal direction of the main body opposite to the first side portion and each positioned between a pair of the first concave portions to face them; and
a plurality of blocking grooves formed in a pair of sidewall portions provided between the first side portion and the second side portion,
wherein each first concave portion of the plurality of first concave portions has a portion overlapping with a portion of a second concave portion of the plurality of second concave portions in a transverse direction of the main body,
wherein in a cross-sectional view of the wavy smoke tube structure, each blocking groove of the plurality of blocking grooves is separated from the plurality of first concave portions and the plurality of second concave portions,
wherein in a plan view of the wavy smoke tube structure, a respective pair of two blocking groove of the plurality of blocking grooves is separated from any first concave portion of the plurality of first concave portions and is overlapped with a middle portion in a longitudinal direction of one second concave portion of the plurality of second concave portions,
wherein the plurality of the blocking grooves are positioned only in particular portions, which are adjacent to the center of each of the second concave portions and between the opposite ends of the plurality of first concave portions, and
wherein a flame moving along the main body moves slowly while being blocked by the blocking grooves.