US 12,241,641 B2
Air heating apparatus
Jun Kyu Park, Seoul (KR); Duck Sik Park, Seoul (KR); Dong Hwan Kim, Seoul (KR); and Seong Sik Moon, Seoul (KR)
Assigned to KYUNGDONG NAVIEN CO., LTD., Pyeongtaek-si (KR)
Filed by KYUNGDONG NAVIEN CO., LTD., Pyeongtaek-si (KR)
Filed on Nov. 18, 2021, as Appl. No. 17/530,098.
Claims priority of application No. 10-2020-0167406 (KR), filed on Dec. 3, 2020; application No. 10-2021-0119778 (KR), filed on Sep. 8, 2021; and application No. 10-2021-0141259 (KR), filed on Oct. 21, 2021.
Prior Publication US 2022/0178554 A1, Jun. 9, 2022
Int. Cl. F24D 19/10 (2006.01); F24D 9/00 (2022.01); F24D 19/08 (2006.01); F24H 8/00 (2022.01); G05B 15/02 (2006.01); F24D 3/02 (2006.01)
CPC F24D 9/00 (2013.01) [F24D 19/083 (2013.01); F24D 19/1015 (2013.01); F24H 8/00 (2013.01); G05B 15/02 (2013.01); F24D 3/02 (2013.01); F24D 2220/025 (2013.01); F24D 2220/042 (2013.01); F24D 2220/044 (2013.01); F28F 2250/106 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An air heating apparatus comprising:
a burner configured to cause a combustion reaction;
a main passage, through which water flows while circulating;
a heat exchanging device configured to receive heat from combustion gas generated by the combustion reaction and heat the water flowing along the main passage;
a heating heat exchanger configured to receive the water heated by the heat exchanging device and exchange heat with the air for heating;
a fan configured to send the air to the heating heat exchanger to which the water heated by the heat exchanging device is received, the fan further configured to discharge the air heated by the heating heat exchanger to an outside of the air heating apparatus; and
a hot water discharge port connected to the main passage such that the water heated by the heat exchanging device is discharged to an outside of the main passage.