US4520425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus with improved structure for cooling circuit elements
Assignee: Mitsubishi Electric Corp
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Filing: 1983-08-10
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Granted: 1985-05-28
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Expires: 2003-08-10
Abstract
Abstract A control apparatus such as an inverter includes a hollow body having generally a rectangular cross-section, composed of sides of sheet metal with upper and lower open ends shielded by cast hollow frames, each having a similar cross-section. Electrical circuit elements are mounted to one of the sides of the hollow body through an opening therein. Ventilating fans are mounted to at least one of the hollow frames for cooling the electrical circuit elements.
Inventors
- 👤 Eizi Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:05
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/2089; H05K7/20909; H05K7/20918; H02; H02M; H02M7/00; H02M7/003
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
A control apparatus comprising: a chassis having a generally rectangular cross section defined by side members and having open opposite ends, one said side member having therein an opening; electrical circuit members mounted on said chassis and extending through said opening in said one side member thereof; heat dissipating means, mounted on the inner surface of said one side member and closing said opening therein, for dissipating into the interior of said chassis heat generated by said electrical circuit members; said chassis defining through said interior thereof a single air channel isolated from direct contact with said electrical circuit elements; frames fitting over said opposite ends of said chassis; and ventilating means, mounted in at least one said frame, for directing through said single air channel a flow of air, thereby to cool said heat dissipating means, and indirectly to cool said electrical circuit members.
Claim 2
Dependent Claim
145 words
A control apparatus comprising: a chassis having a generally rectangular cross section defined by side members and having open opposite ends, one said side member having therein an opening; electrical circuit members mounted on said chassis and extending through said opening in said one side member thereof; heat dissipating means, mounted on the inner surface of said one side member and closing said opening therein, for dissipating into the interior of said chassis heat generated by said electrical circuit members; said chassis defining through said interior thereof a single air channel isolated from direct contact with said electrical circuit elements; frames fitting over said opposite ends of said chassis; and ventilating means, mounted in at least one said frame, for directing through said single air channel a flow of air, thereby to cool said heat dissipating means, and indirectly to cool said electrical circuit members.
Claim 3
Dependent Claim
15 words
An apparatus as claimed in claim 1, wherein said side members comprise sheet metal members.
Claim 4
Dependent Claim
14 words
An apparatus as claimed in claim 1, wherein said frames comprise cast metal members.
Claim 5
Dependent Claim
16 words
An apparatus as claimed in claim 1, wherein said ventilating means comprises at least one fan.
Claim 6
Dependent Claim
24 words
An apparatus as claimed in claim 1, wherein said ventilating means comprises a pair of fans, one each mounted in a respective said frame.
Claim 7
Dependent Claim
26 words
An apparatus as claimed in claim 1, wherein said heat dissipating means comprises a member closing said opening and including fins extending into said air channel.
Claim 8
Dependent Claim
18 words
An apparatus as claimed in claim 6, wherein said electrical circuit members are mounted on said dissipating element.
Claim 9
Dependent Claim
38 words
An apparatus as claimed in claim 1, further comprising a control housing receiving therein said chassis and having suction and discharge ports, and flexible ducts connecting said ports to respective ends of said air channel through said frames.
Claim 10
Dependent Claim
32 words
An apparatus as claimed in claim 1, wherein said frames have projections extending therefrom, and further comprising a panel hinged to said projections, and a printed circuit board mounted on said panel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |