(19)
(11)EP 2 720 524 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
12.04.2017 Bulletin 2017/15

(43)Date of publication A2:
16.04.2014 Bulletin 2014/16

(21)Application number: 14151003.2

(22)Date of filing:  28.08.2008
(51)Int. Cl.: 
H05K 7/20  (2006.01)
(84)Designated Contracting States:
DE FR GB NL

(30)Priority: 03.07.2008 US 167604

(62)Application number of the earlier application in accordance with Art. 76 EPC:
08252855.5 / 2141974

(71)Applicant: Juniper Networks, Inc.
Sunnyvale, CA 94089-1206 (US)

(72)Inventors:
  • Aybay, Gunes
    Sunnyvale, CA 94089-1206 (US)
  • Pradeep, Sindhu
    Sunnyvale, CA 94089-1206 (US)
  • Frailong, Jean-Marc
    Sunnyvale, CA 94089-1206 (US)
  • Lima, David J.
    Sunnyvale, CA 94089-1206 (US)

(74)Representative: D Young & Co LLP 
120 Holborn
London EC1N 2DY
London EC1N 2DY (GB)

  


(54)Front-to-back cooling system for modular systems with orthogonal midplane configuration


(57) A front-to-back cooling system allows cooling of an apparatus containing two orthogonal sets of modules. Each set of modules is independently cooled. A vertical set of modules is cooled with vertical air flow across the modules that enters from a front of the apparatus and exhausts from a back of the apparatus. A horizontal set of modules is cooled with horizontal front-to-back air flow. When the horizontal set of modules is at the front of the apparatus, a plenum extending exterior to the vertical set of modules allows exhausting horizontally flowing air to the rear of the apparatus. When the horizontal set of modules is at the rear of the apparatus, a plenum extending exterior to the vertical set of modules allows moving air from the front of the apparatus to a chamber holding the horizontal modules.