(19)
(11) EP 1 138 948 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.07.2002 Bulletin 2002/27

(43) Date of publication A2:
04.10.2001 Bulletin 2001/40

(21) Application number: 01106165.2

(22) Date of filing: 13.03.2001
(51) International Patent Classification (IPC)7: F04C 18/12, F04C 29/04
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 27.03.2000 JP 2000085889

(71) Applicant: Kabushiki Kaisha Toyota Jidoshokki
Kariya-shi, Aichi-ken (JP)

(72) Inventors:
  • Ishigure, Hiroyuki, c/o K.K. Toyoda Jidoshokki
    Kariya-shi, Aichi-ken 448-8671 (JP)
  • Hashimoto, Yuji, c/o K.K. Toyoda Jidoshokki
    Kariya-shi, Aichi-ken 448-8671 (JP)
  • Ida, Masahiro, c/o K.K. Toyoda Jidoshokki
    Kariya-shi, Aichi-ken 448-8671 (JP)

(74) Representative: Karrais, Martin 
Hoeger, Stellrecht & Partner Uhlandstrasse 14 c
70182 Stuttgart
70182 Stuttgart (DE)

   


(54) Cooling apparatus for vacuum pump


(57) A cooling apparatus, for cooling a vacuum pump, in which a cooler 44 is arranged on a rotor housing 12, a cooler 45 is arranged on a rear housing 14 and a drive unit 33, a cooler 46 is arranged on a controller 37, a cooler 47 is arranged on an inverter 38, and a cooler 48 is mounted on the peripheral surface of an electric motor M is disclosed. The coolers 46, 47, 48 are arranged midway in a main supply pipe 49. The coolers 44, 45, on the other hand, are arranged midway in a subsidiary supply pipe 50. The energization and deenergization of an electromagnetic three-way valve 51 arranged at the diverging point of the main supply pipe 49 and the subsidiary supply pipe 50 is controlled by the controller 37.






Search report