US 12,422,192 B2
Heat treatment furnace
Takanori Isono, Inazawa (JP); Taiki Kinnan, Nagoya (JP); and Michihiro Ito, Nagoya (JP)
Assigned to NGK INSULATORS, LTD., Nagoya (JP); and NGK Kilntech, Corporation, Nagoya (JP)
Filed by NGK INSULATORS, LTD., Nagoya (JP); and NGK KILNTECH, CORPORATION, Nagoya (JP)
Filed on Oct. 25, 2022, as Appl. No. 18/049,386.
Claims priority of application No. 2021-193988 (JP), filed on Nov. 30, 2021.
Prior Publication US 2023/0168036 A1, Jun. 1, 2023
Int. Cl. F27D 9/00 (2006.01); F27B 9/12 (2006.01); F27B 9/24 (2006.01); F27D 1/12 (2006.01)
CPC F27B 9/2407 (2013.01) [F27B 9/12 (2013.01); F27D 1/12 (2013.01); F27D 9/00 (2013.01); F27B 2009/124 (2013.01); F27D 2009/004 (2013.01); F27D 2009/0043 (2013.01); F27D 2009/0067 (2013.01); F27D 2009/0083 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A heat treatment furnace comprising:
a heat treatment unit configured to heat treat an object;
a cooling unit configured to cool the object heat-treated by the heat treatment unit; and
a conveyor configured to convey the object in the heat treatment unit and the cooling unit,
wherein
the cooling unit comprises a housing, wherein the housing is disposed below a conveyance path on which the object is conveyed by the conveyor and configured to cool the object being conveyed by the conveyor by liquid flowing inside the housing,
the housing comprises an upper plate facing the object being conveyed by the conveyor,
the upper plate is tilted so that gas stays at a predetermined portion of the housing while the liquid is flowing in the housing, and
wherein the upper plate is tilted in a conveying direction of the object.