US4837663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic apparatus cooling system
Assignee: Hitachi Microcomputer System Ltd
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Filing: 1988-01-19
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Granted: 1989-06-06
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Expires: 2008-01-19
Abstract
Abstract A cooling system for an electronic apparatus comprises a plurality of mother boards each having a circuit board to be cooled, a blower for causing an air flow from one of the mother boards to the other, and a draft duct for directing the air flow between the mother boards. The draft duct includes an inlet for dividing the air flow into a plurality of partial flows, a partition for changing an air flow direction of the partial flows into some other directions, and an outlet for intermixing the partial flows.
Inventors
- 👤 Shizuo Zushi
- 👤 Mitsuo Miyamoto
- 👤 Hiroshi Gou
- 👤 Fumiyuki Kobayashi
- 👤 Tetsuo Ogata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:32
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20536; H05K7/20554; H05K7/20572
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A cooling system for an electronic apparatus comprising: a plurality of mother boards having circuit boards to be cooled; a blower for causing an air flow from a one mother board to an other mother board; and, a draft duct disposed intermediate the mother boards and having means for dividing the air flow into a plurality of partial flows, means for changing an air flow direction of the partial flows, and means for intermixing the partial flow wherein the intermixed partial flows have a substantially uniform temperature distribution for uniform cooling of the mother boards.
Claim 2
Dependent Claim
95 words
A cooling system for an electronic apparatus comprising: a plurality of mother boards having circuit boards to be cooled; a blower for causing an air flow from a one mother board to an other mother board; and, a draft duct disposed intermediate the mother boards and having means for dividing the air flow into a plurality of partial flows, means for changing an air flow direction of the partial flows, and means for intermixing the partial flow wherein the intermixed partial flows have a substantially uniform temperature distribution for uniform cooling of the mother boards.
Claim 3
Dependent Claim
41 words
The system of claim 1 wherein the changing means includes first inclining means for inclining the direction of some partial flows to one direction and second inclining means for inclining the direction of the other partial flows to an opposed direction.
Claim 4
Dependent Claim
23 words
The system of claim 2 wherein the changing means including means for placing the first inclining means and the second inclining means alternately.
Claim 5
Dependent Claim
99 words
The system of claim 1 wherein the changing means includes first inclining means for inclining the flow of a first some of the partial flows to a first direction, second inclining means for inclining the flow of a second some of the partial flows to a second direction, third inclining means for inclining the flow of a third some of the partial flows to a third direction, and fourth inclining means for inclining the flow of a fourth some of the partial flows to a fourth direction, the partial flows being directed to cross in a generally vertical direction.
Claim 6
Dependent Claim
34 words
The system of claim 1 wherein the system further comprises a chamber for intermixed gathering of the partial flows from the draft duct, said chamber being intermediate the draft duct and a mother board.
Claim 7
Dependent Claim
27 words
The system of claim 1 wherein the system further comprises means for placing the blower at one end of the mother boards opposite to the draft duct.
Claim 8
Dependent Claim
22 words
The system of claim 5 wherein the system further comprises an other chamber intermediate in other mother board and the draft duct.
Claim 9
Dependent Claim
15 words
The system of claim 7 wherein the chambers are disposed oppositely of the draft duct.
Claim 10
Dependent Claim
25 words
The system of claim 7 wherein the mother board includes means for placing the circuit board generally parallel to the direction of the air flow.
Claim 11
Dependent Claim
88 words
A cooling method for a plurality of mother boards generally vertically stacked in a rack, having circuit boards to be cooled, the method comprising the steps of: causing an air flow from a one of the mother boards to an other; dividing the air flow from the one of the mother boards into a plurality of partial flows; changing direction of the partial flows into generally divergent directions; intermixed gathering of the divided partial flows; and, directing the gathered partial flows to the other of the mother boards.
Claim 12
Dependent Claim
88 words
A cooling method for a plurality of mother boards generally vertically stacked in a rack, having circuit boards to be cooled, the method comprising the steps of: causing an air flow from a one of the mother boards to an other; dividing the air flow from the one of the mother boards into a plurality of partial flows; changing direction of the partial flows into generally divergent directions; intermixed gathering of the divided partial flows; and, directing the gathered partial flows to the other of the mother boards.
Claim 13
Dependent Claim
49 words
The cooling method of claim 10 wherein the changing step includes the steps of changing the direction of some partial flows into a direction inclined to first direction, and changing the direction of the other partial flows into a direction inclined to an opposed direction of the first direction.
References Cited (Backward Citations)
US3198991A
Cited
US4315300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |