Brazed wick for a heat transfer device and method of making same
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0 Petitions
Accused Products
Abstract
A capillary structure for a heat transfer device, such as a heat pipe is provided having a plurality of particles joined together by a brazing compound such that fillets of the brazing compound are formed between adjacent ones of the plurality of particles. In this way, a network of capillary passageways are formed between the particles to aid in the transfer of working fluid by capillary action, while the plurality of fillets. provide enhanced thermal transfer properties between the plurality of particles so as to greatly improve over all heat transfer efficiency of the device. A method of making the capillary structure according to the invention is also presented.
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Citations
67 Claims
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1-58. -58. (canceled)
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59. A heat pipe comprising:
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a sealed and partially evacuated enclosure having an internal surface;
a grooved brazed wick disposed upon said internal surface comprising a plurality of individual particles which together yield an average particle diameter and a brazing compound comprising about sixty-five percent weight copper and thirty-five percent weight gold such that said fillets of said brazing compound are formed between adjacent ones of said plurality of particles so as to create a network of capillary passageways between said particles, and further including at least two lands that are in fluid communication with one another through a particle layer disposed between said at least two lands wherein said particle layer comprises at least one dimension that is no more than about six average particle diameters wherein said particles in said particle layer are thermally engaged with one another by a plurality of said fillets; and
a working fluid disposed within said enclosure. - View Dependent Claims (60, 61, 62, 64, 65)
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63. A heat pipe comprising:
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a sealed and partially evacuated enclosure having an internal surface;
a grooved brazed wick disposed upon said internal surface comprising a plurality of individual particles which together yield an average particle diameter and a brazing compound comprising about sixty-five percent weight copper and thirty-five percent weight gold and further wherein said brazing compound comprises six percent by weight of a finely divided copper/gold such that fillets of said brazing compound are formed between adjacent ones of said plurality of individual particles so as to create a network of capillary passageways between said individual particles, and further including at least two lands that are in fluid communication with one another through a particle layer disposed between said at least two lands wherein said particle layer comprises at least one dimension that is no more than about six average particle diameters wherein said particles in said particle layer are thermally engaged with one another by a plurality of said fillets; and
a working fluid disposed within said enclosure.
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66. A heat pipe comprising:
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a sealed and partially evacuated enclosure having an internal surface;
a grooved brazed wick disposed upon said internal surface comprising a plurality of individual particles and a brazing compound comprising about sixty-five percent weight copper and thirty-five percent weight gold such that fillets of said brazing compound are formed between adjacent ones of said plurality of particles, and further including at least two lands that are in fluid communication with one another wherein said particles are thermally engaged with one another by a plurality of said fillets; and
a working fluid disposed within said enclosure.
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67. A heat pipe comprising:
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a sealed and partially evacuated tubular enclosure having an internal surface covered by a brazed wick comprising a plurality of particles joined together by a brazing compound comprising about sixty-five percent weight copper and thirty-five percent weight gold such that fillets of said brazing compound are formed between adjacent ones of said plurality of particles so as to form a network of capillary passageways between said particle and sealed at a first end;
a base sealingly fixed to a second end of said enclosure so as to form an internal surface within said enclosure;
a working fluid disposed within said enclosure;
at least one fin projecting radially outwardly from an outer surface of said tubular enclosure; and
a grooved brazed wick disposed upon said internal surface comprising a plurality of individual particles which together yield an average particle diameter and said brazing compound such that fillets of said brazing compound are formed between adjacent ones of said plurality of particles, and further including at least two lands that are in fluid communication with one another through a particle layer disposed between said at least two lands wherein said particle layer comprises at least one dimension that is no more than about six average particle diameters wherein said particles in said particle layer are thermally engaged with one another by a plurality of said fillets.
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Specification