US 12,331,995 B2
Glass furnace provided with optical fibers
Mickaël Boinet, Cavaillon (FR); Isabelle Cabodi, Cavaillon (FR); Olivier Citti, Cavaillon (FR); Vincent Gleize, Avignon (FR); and Jean-Gaël Vuillermet, Cavaillon (FR)
Assigned to SAINT-GOBAIN CENTRE DE RECHERCHES, Courbevoie (FR)
Appl. No. 17/263,812
Filed by SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN, Courbevoie (FR)
PCT Filed Jul. 26, 2019, PCT No. PCT/EP2019/070232
§ 371(c)(1), (2) Date Jan. 27, 2021,
PCT Pub. No. WO2020/025492, PCT Pub. Date Feb. 6, 2020.
Claims priority of application No. 1857215 (FR), filed on Aug. 1, 2018.
Prior Publication US 2021/0310738 A1, Oct. 7, 2021
Int. Cl. F27D 19/00 (2006.01); C03B 5/16 (2006.01); F27D 21/00 (2006.01)
CPC F27D 19/00 (2013.01) [C03B 5/16 (2013.01); F27D 21/0014 (2013.01); F27D 2019/0003 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A glass furnace comprising:
a refractory portion defining a face in contact or intended to be in contact with molten glass or with a gaseous environment in contact with molten glass, as a “hot face”, and a face at a distance from said hot face, as a “cold face”, and
a temperature measurement device comprising one or a plurality of waveguides and one or a plurality of interrogators:
each waveguide comprising a measurement portion comprising at least one temperature measurement sensor configured to send a response signal in response to an injection of an interrogation signal into the waveguide, one of said interrogators being connected to an input of the waveguide and configured to inject the interrogation signal into said input, to receive said response signal returned by the at least one temperature measurement sensor in response to the injection of said interrogation signal, to analyze the response signal received to obtain an analysis, and to transmit a message according to said analysis;
the glass furnace comprising a thermally insulating layer adjacent to the cold face of the refractory portion,
wherein said thermally insulating layer, or an elementary insulating layer when said thermally insulating layer consists of at least two elementary insulating layers made of different materials, being formed, by sintering at a temperature between 400° C. and 1200° C., around the measurement portion, so that said measurement portion is in contact with said thermally insulating layer, or with said elementary insulating layer when said thermally insulating layer consists of at least two elementary insulating layers made of different materials.