US 12,110,907 B2
Heating device and vacuum pump
Pierre-Emmanuel Cavarec, Annecy (FR); Romain Criado, Annecy (FR); François Roger, Annecy (FR); and Eric Dulac, Annecy (FR)
Assigned to PFEIFFER VACUUM, Annecy (FR)
Appl. No. 18/253,800
Filed by PFEIFFER VACUUM, Annecy (FR)
PCT Filed Jan. 4, 2022, PCT No. PCT/EP2022/050068
§ 371(c)(1), (2) Date May 22, 2023,
PCT Pub. No. WO2022/148745, PCT Pub. Date Jul. 14, 2022.
Claims priority of application No. 21 00090 (FR), filed on Jan. 6, 2021.
Prior Publication US 2024/0018972 A1, Jan. 18, 2024
Int. Cl. F04D 29/58 (2006.01); F04D 19/04 (2006.01); F04D 29/02 (2006.01)
CPC F04D 29/584 (2013.01) [F04D 19/042 (2013.01); F04D 29/023 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A vacuum pump configured to drive gases to be pumped in a direction of circulation of the gases going from a suction orifice to a discharge orifice, the vacuum pump comprising:
a stator and at least one rotor configured to rotate in the stator; and
a heating device comprising at least one radiating body configured to radiate in the infrared when the at least one radiating body is heated to a temperature above 150° C., the at least one radiating body being arranged in the pumping path of the gases by being fixed to a body of the stator and by being thermally insulated from inner walls of the stator, the inner walls of the stator and walls of the at least one rotor configured to be in communication with the pumped gases exhibiting an emissivity less than or equal to 0.2, the at least one radiating body having a surface of emissivity greater than or equal 0.4.