US3827480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically insulated double tube heat pipe arrangement
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1972-04-20
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Granted: 1974-08-06
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Expires: 1992-04-20
Abstract
Abstract For cooling a heat source, such as a component part of electronic equipment which has a high electrical potential, a heat pipe arrangement is employed which is formed of a closed first pipe or tube in contact with the heat source and a closed second pipe or tube enclosing the first tube. A capillary structure of a metallic material is formed on the inner surface of the first tube and a similar capillary structure also of a metallic material is formed on the outer surface of the first tube and acts as a part of the capillary structure within the second tube. On the inner surface of the second tube, spaced outwardly from the capillary structure on the outer surface of the inner tube, is another capillary structure connected by a bridging member formed of an electrical insulating material, to the capillary structure on the outer surface of the inner tube to permit condensation to flow from the capillary structure on the outer tube to that on the inner tube. Similarly, a bridging member is provided within the inner tube for the same purpose, the vaporizable working medium within the inner tube is either water or a metal while the working medium within the outer tube is a vaporizable dielectric liquid.
Inventors
- 👤 G Gammel
- 👤 P Pawlowski
- 👤 U Heidtmann
- 👤 M Jons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:51
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/70; H10W40/73; F; F28; F28D; F28D15/00; F28D15/02; F28D15/0275; F28D15/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
342 words
An electrically insulated heat pipe arrangement for high heat flux densities for cooling heat surfaces which have a high electric potential, such as component parts of electronic equipment, comprising a first axially extending tube closed at its ends and having a first closed space therewithin, a second axially extending tube closed at its ends and laterally enclosing said first tube, said second tube forming in combination with the outer surface of said first tube a second closed space completely enclosing at least the sides and one end surface of said first tube, a first capillary structure lining the interior surface of said first tube, a second capillary structure formed on the outer surface of said first tube and located within said second space, a third capillary structure formed on the interior of said second tube and spaced from said second capillary structure, a vaporizable electrically conductive working medium located within said first space in said first tube, a vaporizable dielectric working medium located within the second space in said second tube and maintained separate from said vaporizable working medium located in said first space, said electrically conductive working medium within said first space being capable of absorbing a considerably higher heat flux density than the dielectric working medium in said second space, an electrically insulating section located within said second space and separating and mechanically connecting said first tube and said second tube together, a fourth capillary structure located within said second space formed of an electrically insulating material and extending between said second capillary structure and said third capillary structure, and said first tube arranged to act as a heat transfer surface for withdrawing heat from a component part and supplying the withdrawn heat into said second space with one portion of the surface of said first tube acting as a heat-receiving surface for said first space and a separate portion of said first tube which is completely enclosed by said second tube acting as the heatdelivering surface for said first space and as the heat-receiving surface for said second space.
Claim 2
Dependent Claim
342 words
An electrically insulated heat pipe arrangement for high heat flux densities for cooling heat surfaces which have a high electric potential, such as component parts of electronic equipment, comprising a first axially extending tube closed at its ends and having a first closed space therewithin, a second axially extending tube closed at its ends and laterally enclosing said first tube, said second tube forming in combination with the outer surface of said first tube a second closed space completely enclosing at least the sides and one end surface of said first tube, a first capillary structure lining the interior surface of said first tube, a second capillary structure formed on the outer surface of said first tube and located within said second space, a third capillary structure formed on the interior of said second tube and spaced from said second capillary structure, a vaporizable electrically conductive working medium located within said first space in said first tube, a vaporizable dielectric working medium located within the second space in said second tube and maintained separate from said vaporizable working medium located in said first space, said electrically conductive working medium within said first space being capable of absorbing a considerably higher heat flux density than the dielectric working medium in said second space, an electrically insulating section located within said second space and separating and mechanically connecting said first tube and said second tube together, a fourth capillary structure located within said second space formed of an electrically insulating material and extending between said second capillary structure and said third capillary structure, and said first tube arranged to act as a heat transfer surface for withdrawing heat from a component part and supplying the withdrawn heat into said second space with one portion of the surface of said first tube acting as a heat-receiving surface for said first space and a separate portion of said first tube which is completely enclosed by said second tube acting as the heatdelivering surface for said first space and as the heat-receiving surface for said second space.
Claim 3
Dependent Claim
22 words
An electrically insulated heat pipe arrangement, as set forth in claim 1, wherein said working medium in said first space is water.
Claim 4
Dependent Claim
25 words
An electrically insulated heat pipe arrangement, as set forth in claim 1, wherein said working medium in said first space is a vaporizable liquid metal.
Claim 5
Dependent Claim
45 words
An electrically insulated heat pipe arrangement, as set forth in claim 1, wherein said first tube has a cup-shaped recess formed in one end surface thereof and said recess acting as the heat-receiving surface for said first space for removing heat from the component part.
Claim 6
Dependent Claim
59 words
An electrically insulated heat pipe arrangement, as set forth in claim 4, wherein a bridging member formed of the same capillary material as said first capillary structure is located within said first tube and extends from said first capillary structure in contact with said cup-shaped recess to a location on said first capillary structure spaced from said cup-shaped recess.
Claim 7
Dependent Claim
27 words
An electrically insulated heat pipe arrangement, as set forth in claim 5, wherein said first capillary structure and said bridging member are formed of a metallic material.
Claim 8
Dependent Claim
53 words
An electrically insulated heat pipe arrangement, as set forth in claim 1, wherein at least one bridging member formed of an electrically insulating capillary material interconnects said second and third capillary structures so that said bridging member affords a return flow of condensation from said third capillary structure to said second capillary structure.
Claim 9
Dependent Claim
39 words
An electrically insulated heat pipe arrangement, as set forth in claim 1, wherein a conduit is connected to said second tube and communicates with the space therein between said first and second tubes for supplying a buffer gas thereto.
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |