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EP0020084A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

An electronics rack cooled by natural air convection

Assignee: Fujitsu Ltd
•
Filing: 1980-05-21
•
Granted: —
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Expires: 2000-05-21
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Abstract

Abstract A natural air cooled rack for vertically disposed printed boards. The rack comprises a plurality of stacked cases (1) for housing printed boards (3). Each of the cases has draught openings (2, 4) on the upper surface and the lower surface thereof. An interspace is formed between one or more upper cases and the one or more lower cases. At least one supply opening (7) and at least one exhaust opening (11) are formed in the front portion of said interspace. The supply opening (7) communicates with said draught opening (4) on the lower surface of said upper case while said exhaust opening (11) communicates with said draught opening (2) on the upper surface of said lower case. Said exhuast opening (11) is located substantially above said supply opening (7).

Inventors

  • 👤 Kiyoshi Matsui
  • 👤 Katsuyuki Arai
  • 👤 Sueo Shinbashi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-31 03:17
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20009; H05K7/20127; Y; Y10; Y10S; Y10S165/00; Y10S165/903

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 118 words
A natural air cooled rack for vertically disposed printed boards comprising a plurality of stacked cases for housing printed boards each of which cases has draught openings on the upper surface and the lower surface thereof, characterized in that an interspace is formed between one or more upper cases and one or more lower cases; at least one supply opening and at least one exhaust opening are formed in the front portion of said interspace; said supply opening communicates with said draught opening on the lower surface of said upper case while said exhaust opening communicates with said draught opening on the upper surface of said lower case; said exhaust opening is located substantially above said supply opening.
Claim 2
Dependent Claim 118 words
A natural air cooled rack for vertically disposed printed boards comprising a plurality of stacked cases for housing printed boards each of which cases has draught openings on the upper surface and the lower surface thereof, characterized in that an interspace is formed between one or more upper cases and one or more lower cases; at least one supply opening and at least one exhaust opening are formed in the front portion of said interspace; said supply opening communicates with said draught opening on the lower surface of said upper case while said exhaust opening communicates with said draught opening on the upper surface of said lower case; said exhaust opening is located substantially above said supply opening.
Claim 3
Dependent Claim 18 words
A rack according to claim 1, characterized in that said interspace is formed between every two adjacent cases.
Claim 4
Dependent Claim 20 words
A rack according to claim 1, characterized in that at least two cases are stacked without forming said interspace therebetween.
Claim 5
Dependent Claim 55 words
A rack according to claim 1, characterized in that in said interspace a baffle plate is obliquely installed between the front edge of the upper case and the rear edge of the lower case; at least one opening is formed on said baffle plate which opening communicates with said supply opening through a supply passage.

References Cited (Backward Citations)

DE1103433B Cited
US3730264A Cited
US3874444A Cited
DE2755811A1 Cited

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