US20110174466A1 - Flat heat pipe - Google Patents
Flat heat pipe Download PDFInfo
- Publication number
- US20110174466A1 US20110174466A1 US12/817,210 US81721010A US2011174466A1 US 20110174466 A1 US20110174466 A1 US 20110174466A1 US 81721010 A US81721010 A US 81721010A US 2011174466 A1 US2011174466 A1 US 2011174466A1
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- US
- United States
- Prior art keywords
- casing
- wick structure
- wick
- heat pipe
- sidewall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
- H01L23/427—Cooling by change of state, e.g. use of heat pipes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the disclosure generally relates to heat transfer apparatuses, and particularly to a heat pipe with high heat transfer efficiency.
- Heat pipes are widely used in various fields for heat dissipation purposes due to their excellent heat transfer performance.
- One commonly used heat pipe includes a sealed tube made of heat conductive material, with a working fluid contained therein.
- the working fluid conveys heat from one end of the tube, typically referred to as an evaporator section, to the other end of the tube, typically referred to as a condenser section.
- a wick structure is provided inside the heat pipe, lining an inner wall of the tube, and drawing the working fluid back to the evaporator section after it condenses at the condenser section.
- the evaporator section of the heat pipe maintains thermal contact with a heat-generating electronic component.
- the working fluid at the evaporator section absorbs heat generated by the electronic component, and thereby turns to vapor. Due to the difference in vapor pressure between the two sections of the heat pipe, the generated vapor moves, carrying the heat with it, toward the condenser section.
- the vapor condenses after transferring the heat to, for example, fins thermally contacting the condenser section. The fins then release the heat into the ambient environment. Due to the difference in capillary pressure which develops in the wick structure between the two sections, the condensate is then drawn back by the wick structure to the evaporator section where it is again available for evaporation.
- the heat pipe is flattened to increase a contact area with the electronic component and enable smaller electronic products to incorporate the heat pipe.
- this may downsize a vapor channel of the heat pipe through which the vapor flows from the evaporator section to the condenser section. In such case, the generated vapor may not move toward the condenser section in a timely manner, and the heat transfer efficiency of the heat pipe is thereby reduced.
- FIG. 1 is an abbreviated, lateral side plan view of a heat pipe in accordance with a first embodiment of the disclosure.
- FIG. 2 is an enlarged, transverse cross section of the heat pipe of FIG. 1 , taken along line II-II thereof.
- FIG. 3 is an enlarged, transverse cross section of the heat pipe of FIG. 1 , taken along line thereof.
- FIG. 4 is an enlarged, longitudinal cross section of the heat pipe of FIG. 1 , taken along line IV-IV thereof.
- FIG. 5 is similar to FIG. 3 , but shows a transverse cross section of a heat pipe according to a second embodiment of the disclosure.
- FIG. 6 is similar to FIG. 3 , but shows a transverse cross section of a heat pipe according to a third embodiment of the disclosure.
- FIG. 7 is similar to FIG. 2 , but shows a transverse cross section of a heat pipe according to a fourth embodiment of the disclosure.
- the heat pipe 10 is a flat heat pipe, and includes a flat tube-like casing 11 with two ends thereof sealed, and a variety of elements enclosed in the casing 11 .
- Such elements include two first wick structures 12 , 13 , a second wick structure 14 , and a working medium (not shown).
- the casing 11 is made of metal or metal alloy with a high heat conductivity coefficient, such as copper, copper-alloy, or other suitable material.
- the casing 11 is elongated, and has an evaporator section 111 and an opposite condenser section 113 located end-to-end along a longitudinal direction thereof.
- the casing 11 has a width larger than its height.
- the casing 11 has a flattened transverse cross section. To meet the height requirements of common electronic products, the height of the casing 11 is preferably less than 2 millimeters (mm).
- the casing 11 is hollow, and includes a top plate 114 , a bottom plate 115 opposite to the top plate 114 , and two side plates 116 , 117 interconnecting the top and bottom plates 114 , 115 .
- the top and bottom plates 114 , 115 are flat and parallel to each other.
- the side plates 116 , 117 are arcuate and respectively disposed at opposite lateral sides of the casing 11 .
- the casing 11 defines a first vapor channel 141 within the evaporator section 111 .
- the second wick structure 14 is made of sintered metal powder, such as copper powder or other suitable material.
- the second wick structure 14 is only located in the evaporator section 111 , and sandwiched between the top and bottom plates 114 , 115 of the casing 11 .
- the second wick structure 14 is annular, and snugly contacts an entire inner surface of the casing 11 at the evaporator section 111 .
- the first vapor channel 141 is defined in the second wick structure 14 .
- Each of the first wick structures 12 , 13 is an elongated hollow tube, and extends longitudinally from a joint 149 located between the evaporator section 111 and the condenser section 113 into and through an entire length of the condenser section 113 .
- An inner space 140 is longitudinally defined in each of the first wick structures 12 , 13 .
- Each of the first wick structures 12 , 13 is a monolayer-type structure formed by weaving a plurality of metal wires such as copper or stainless steel wires.
- the first wick structures 12 , 13 thus have a plurality of pores therein.
- each of the first wick structures 12 , 13 can be a multilayer-type structure layered along a radial direction thereof by weaving a plurality of metal wires.
- the first wick structures 12 , 13 are only located in the condenser section 113 .
- the first wick structures 12 , 13 are disposed at opposite inner sides of the casing 11 , respectively.
- Each of the first wick structures 12 , 13 is extruded to a flattened shape by the inner surface of the casing 11 .
- Each first wick structure 12 , 13 has a flattened transverse cross section, similar in principle to the flattened transverse cross section of the casing 11 .
- each first wick structure 12 , 13 includes a top wall 121 , 131 , a bottom wall 122 , 132 opposite to the top wall 121 , 131 , and a left sidewall 123 , 133 and a right sidewall 124 , 134 interconnecting the top and bottom walls 121 , 131 , 122 , 132 .
- the top and bottom walls 121 , 131 , 122 , 132 are flat and parallel to each other.
- the left and right sidewalls 123 , 133 , 124 , 134 are arcuate and respectively disposed at opposite lateral sides of each first wick structure 12 , 13 .
- the first wick structure 12 is disposed at a right inner side of the casing 11 within the condenser section 113 .
- the top wall 121 , the bottom wall 122 and the right sidewall 124 of the first wick structure 12 cooperatively form a U-shaped contact portion in contact with an inner surface of the casing 11 .
- the contacting inner surface of the casing 11 includes the side plate 116 , and a portion of each of the top and bottom plates 114 , 115 adjacent to the side plate 116 .
- the left sidewall 123 of the first wick structure 12 forms a C-shaped isolated portion 126 isolated from the inner surface of the casing 11 .
- the first wick structure 13 is disposed at a left inner side of the casing 11 within the condenser section 113 .
- the top wall 131 , the bottom wall 132 and the left sidewall 133 of the first wick structure 13 cooperatively form a U-shaped contact portion in contact with an inner surface of the casing 11 .
- the contacting inner surface of the casing 11 includes the side plate 117 , and a portion of each of the top and bottom plates 114 , 115 adjacent to the side plate 117 .
- the right sidewall 134 of the first wick structure 13 forms a C-shaped isolated portion 136 isolated from the inner surface of the casing 11 .
- the left sidewall 123 of the first wick structure 12 , the right sidewall 134 of the first wick structure 13 and the inner surface of the casing 11 cooperatively define a second vapor channel 142 therebetween.
- the isolated portions 126 , 136 and the inner surface of the casing 11 cooperatively define the second vapor channel 142 therebetween.
- An end of the second vapor channel 142 communicates with an end of the first vapor channel 141 .
- the first and second vapor channels 141 , 142 cooperatively provide a passage through which the vapor flows from the evaporator section 111 to the condenser section 113 .
- the isolated portions 126 , 136 of the first wick structures 12 , 13 face a center of the casing 11 .
- the first wick structures 12 , 13 extend longitudinally in the condenser section 113 to the second wick structure 14 , and join the second wick structure 14 at the joint 149 between the evaporator section 111 and the condenser section 113 via sintering.
- the first and second wick structures 12 , 13 , 14 cooperatively form a composite wick structure 17 in the casing 11 .
- a diameter of the inner space 140 of each first wick structure 12 , 13 exceeds a thickness of a circumferential wall of the second wick structure 14 as measured in a horizontal direction of the casing 11 .
- the second wick structure 14 blocks a portion of the end of the inner space 140 of each first wick structure 12 , 13 at the joint 149 .
- the inner spaces 140 of the first wick structures 12 , 13 and the second vapor channel 142 between the first wick structures 12 , 13 all communicate with the first vapor channel 141 .
- the working medium is saturated in the first and second wick structures 12 , 13 , 14 .
- the working medium is usually selected from a liquid such as water, methanol, or alcohol, which has a low boiling point.
- the casing 11 of the heat pipe 10 is evacuated and hermetically sealed after the working medium is injected into the casing 11 and saturated in the first and second wick structures 12 , 13 , 14 .
- the working medium can easily evaporate when it receives heat at the evaporator section 111 of the heat pipe 10 .
- the evaporator section 111 of the heat pipe 10 is placed in thermal contact with a heat source (not shown) that needs to be cooled.
- the heat source can, for example, be a central processing unit (CPU) of a computer.
- the working medium contained in the evaporator section 111 of the heat pipe 10 is vaporized when receiving heat generated by the heat source.
- the generated vapor moves from the evaporator section 111 via the vapor channels 141 , 142 to the condenser section 113 .
- the condensate is returned by the first and second wick structures 12 , 13 , 14 to the evaporator section 111 of the heat pipe 10 , where the condensate is again available for evaporation.
- the first and second wick structures 12 , 13 , 14 cooperatively form the composite wick structure 17 in the casing 11 .
- This increases capillary force, and reduces flow resistance and heat resistance.
- the condensate is returned to the evaporator section 111 of the heat pipe 10 rapidly, thus preventing potential drying out at the evaporator section 111 .
- the first and second wick structures 12 , 13 , 14 are only located in the condenser section 113 and the evaporator section 111 , respectively.
- first wick structures 12 , 13 are joined to the second wick structure 14 at the joint 149 via sintering.
- the first wick structures 12 , 13 closely and continuously connect with the second wick structure 14 , and the working medium can be rapidly saturated in the second wick structure 14 after returning to the evaporator section 111 via the first wick structures 12 , 13 .
- the first wick structures 12 , 13 cannot move freely in the casing 11 . This increases the flow of the working media in the casing 11 , and improves the heat transfer performance of the heat pipe 10 .
- a heat pipe 20 in accordance with a second embodiment of the disclosure is shown.
- the heat pipe 20 differs from the heat pipe 10 of the first embodiment only in that there is only one first wick structure 22 .
- the first wick structure 22 is disposed in a center of the casing 11 within the condenser section 213 .
- top and bottom walls 221 , 222 of the first wick structure 22 form two contact portions in contact with the inner surface of the casing 11 , respectively.
- the contacting inner surface of the casing 11 includes the top and bottom plates 114 , 115 .
- Two sidewalls 223 , 224 of the first wick structure 22 form two isolated portions isolated from the inner surface of the casing 11 , respectively.
- Two passages 2421 , 2422 are respectively defined between the sidewalls 223 , 224 of the first wick structure 22 and the inner surface of the casing 11 , the passages 2421 , 2422 being disposed beside opposite sides of the first wick structure 22 , respectively.
- the two passages 2421 , 2422 cooperatively form a second vapor channel 242 . Ends of the passages 2421 , 2422 communicate with an end of the first vapor channel 141 of the second wick structure 14 .
- a heat pipe 30 in accordance with a third embodiment of the disclosure is shown.
- the heat pipe 30 differs from the heat pipe 10 of the first embodiment only in that another first wick structure 35 is deployed in a center of the casing 11 , for a total of three first wick structures 12 , 13 , 35 .
- the first wick structures 12 , 13 , 35 are spaced from each other.
- the first wick structure 35 is the same as the first wick structure 22 of the second embodiment.
- the right sidewall 134 of the first wick structure 13 , the left sidewall 353 of the first wick structure 35 , and the inner surface of the casing 11 cooperatively define a passage 3421 therebetween.
- the left sidewall 123 of the first wick structure 12 , the right sidewall 354 of the first wick structure 35 , and the inner surface of the casing 11 cooperatively define another passage 3422 therebetween.
- the two passages 3421 , 3422 cooperatively form a second vapor channel 342 . Ends of the passages 3421 , 3422 communicate with an end of the first vapor channel 141 of the second wick structure 14 .
- a heat pipe 40 in accordance with a third embodiment of the disclosure is shown.
- the heat pipe 40 differs from the heat pipe 10 of the first embodiment only in that a second wick structure 44 contacts a portion of the inner surface of the casing 11 at the evaporator section 411 which corresponds to an area of an outside of the casing 11 designated for contacting a heat-generating electronic component 70 .
- the second wick structure 44 is plate-shaped, and contacts an inner surface of the bottom plate 115 of the casing 11 .
- the electronic component 70 contacts an outer surface of the bottom plate 115 .
- the second wick structure 44 and the inner surface of the casing 11 cooperatively define a first vapor channel 441 therebetween. More particularly, the second wick structure 44 , the top plate 114 and the side plates 116 , 117 cooperatively define the first vapor channel 441 therebetween.
- the second wick structure 44 contacts a portion of the casing 11 within the evaporator section 411 corresponding to the electronic component 70 .
- This enlarges the first vapor channel 441 in the evaporator section 411 , and further promotes the flow of the working medium in the heat pipe 40 .
- heat generated by the electronic component 70 can be rapidly transferred to the second wick structure 44 by the casing 11 , whereby the heat transfer performance of the heat pipe 40 is improved.
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
Description
- This application is related to two co-pending applications respectively entitled “FLAT HEAT PIPE AND METHOD FOR MANUFACTURING THE SAME” (attorney docket number US31525) and “FLAT HEAT PIPE WITH VAPOR CHANNEL” (attorney docket number US32037), assigned to the same assignee of this application and filed on the same date as this application. The two related applications are incorporated herein by reference.
- 1. Technical Field
- The disclosure generally relates to heat transfer apparatuses, and particularly to a heat pipe with high heat transfer efficiency.
- 2. Description of Related Art
- Heat pipes are widely used in various fields for heat dissipation purposes due to their excellent heat transfer performance. One commonly used heat pipe includes a sealed tube made of heat conductive material, with a working fluid contained therein. The working fluid conveys heat from one end of the tube, typically referred to as an evaporator section, to the other end of the tube, typically referred to as a condenser section. Preferably, a wick structure is provided inside the heat pipe, lining an inner wall of the tube, and drawing the working fluid back to the evaporator section after it condenses at the condenser section.
- During operation, the evaporator section of the heat pipe maintains thermal contact with a heat-generating electronic component. The working fluid at the evaporator section absorbs heat generated by the electronic component, and thereby turns to vapor. Due to the difference in vapor pressure between the two sections of the heat pipe, the generated vapor moves, carrying the heat with it, toward the condenser section. At the condenser section, the vapor condenses after transferring the heat to, for example, fins thermally contacting the condenser section. The fins then release the heat into the ambient environment. Due to the difference in capillary pressure which develops in the wick structure between the two sections, the condensate is then drawn back by the wick structure to the evaporator section where it is again available for evaporation.
- In ordinary use, the heat pipe is flattened to increase a contact area with the electronic component and enable smaller electronic products to incorporate the heat pipe. However, this may downsize a vapor channel of the heat pipe through which the vapor flows from the evaporator section to the condenser section. In such case, the generated vapor may not move toward the condenser section in a timely manner, and the heat transfer efficiency of the heat pipe is thereby reduced.
- What is needed, therefore, is a flat heat pipe which can overcome the described limitations.
- Many aspects of the present embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the various views, and all the views are schematic.
-
FIG. 1 is an abbreviated, lateral side plan view of a heat pipe in accordance with a first embodiment of the disclosure. -
FIG. 2 is an enlarged, transverse cross section of the heat pipe ofFIG. 1 , taken along line II-II thereof. -
FIG. 3 is an enlarged, transverse cross section of the heat pipe ofFIG. 1 , taken along line thereof. -
FIG. 4 is an enlarged, longitudinal cross section of the heat pipe ofFIG. 1 , taken along line IV-IV thereof. -
FIG. 5 is similar toFIG. 3 , but shows a transverse cross section of a heat pipe according to a second embodiment of the disclosure. -
FIG. 6 is similar toFIG. 3 , but shows a transverse cross section of a heat pipe according to a third embodiment of the disclosure. -
FIG. 7 is similar toFIG. 2 , but shows a transverse cross section of a heat pipe according to a fourth embodiment of the disclosure. - Referring to
FIGS. 1-3 , aheat pipe 10 in accordance with a first embodiment of the disclosure is shown. Theheat pipe 10 is a flat heat pipe, and includes a flat tube-like casing 11 with two ends thereof sealed, and a variety of elements enclosed in thecasing 11. Such elements include twofirst wick structures second wick structure 14, and a working medium (not shown). - The
casing 11 is made of metal or metal alloy with a high heat conductivity coefficient, such as copper, copper-alloy, or other suitable material. Thecasing 11 is elongated, and has anevaporator section 111 and anopposite condenser section 113 located end-to-end along a longitudinal direction thereof. Thecasing 11 has a width larger than its height. In particular, thecasing 11 has a flattened transverse cross section. To meet the height requirements of common electronic products, the height of thecasing 11 is preferably less than 2 millimeters (mm). Thecasing 11 is hollow, and includes atop plate 114, abottom plate 115 opposite to thetop plate 114, and twoside plates bottom plates bottom plates side plates casing 11. Thecasing 11 defines afirst vapor channel 141 within theevaporator section 111. - The
second wick structure 14 is made of sintered metal powder, such as copper powder or other suitable material. Thesecond wick structure 14 is only located in theevaporator section 111, and sandwiched between the top andbottom plates casing 11. In this embodiment, thesecond wick structure 14 is annular, and snugly contacts an entire inner surface of thecasing 11 at theevaporator section 111. Thefirst vapor channel 141 is defined in thesecond wick structure 14. - Each of the
first wick structures joint 149 located between theevaporator section 111 and thecondenser section 113 into and through an entire length of thecondenser section 113. Aninner space 140 is longitudinally defined in each of thefirst wick structures first wick structures first wick structures first wick structures - The
first wick structures condenser section 113. In this embodiment, thefirst wick structures casing 11, respectively. Each of thefirst wick structures casing 11. Eachfirst wick structure casing 11. In particular, eachfirst wick structure top wall bottom wall top wall left sidewall 123, 133 and aright sidewall bottom walls bottom walls right sidewalls first wick structure - The
first wick structure 12 is disposed at a right inner side of thecasing 11 within thecondenser section 113. Thetop wall 121, thebottom wall 122 and theright sidewall 124 of thefirst wick structure 12 cooperatively form a U-shaped contact portion in contact with an inner surface of thecasing 11. In particular, the contacting inner surface of thecasing 11 includes theside plate 116, and a portion of each of the top andbottom plates side plate 116. Theleft sidewall 123 of thefirst wick structure 12 forms a C-shapedisolated portion 126 isolated from the inner surface of thecasing 11. - The
first wick structure 13 is disposed at a left inner side of thecasing 11 within thecondenser section 113. Thetop wall 131, thebottom wall 132 and the left sidewall 133 of thefirst wick structure 13 cooperatively form a U-shaped contact portion in contact with an inner surface of thecasing 11. In particular, the contacting inner surface of thecasing 11 includes theside plate 117, and a portion of each of the top andbottom plates side plate 117. Theright sidewall 134 of thefirst wick structure 13 forms a C-shapedisolated portion 136 isolated from the inner surface of thecasing 11. Theleft sidewall 123 of thefirst wick structure 12, theright sidewall 134 of thefirst wick structure 13 and the inner surface of thecasing 11 cooperatively define asecond vapor channel 142 therebetween. In other words, theisolated portions casing 11 cooperatively define thesecond vapor channel 142 therebetween. An end of thesecond vapor channel 142 communicates with an end of thefirst vapor channel 141. The first andsecond vapor channels evaporator section 111 to thecondenser section 113. Theisolated portions first wick structures casing 11. - Referring also to
FIG. 4 , thefirst wick structures condenser section 113 to thesecond wick structure 14, and join thesecond wick structure 14 at the joint 149 between theevaporator section 111 and thecondenser section 113 via sintering. The first andsecond wick structures composite wick structure 17 in thecasing 11. A diameter of theinner space 140 of eachfirst wick structure second wick structure 14 as measured in a horizontal direction of thecasing 11. Thesecond wick structure 14 blocks a portion of the end of theinner space 140 of eachfirst wick structure inner spaces 140 of thefirst wick structures second vapor channel 142 between thefirst wick structures first vapor channel 141. - The working medium is saturated in the first and
second wick structures casing 11 of theheat pipe 10 is evacuated and hermetically sealed after the working medium is injected into thecasing 11 and saturated in the first andsecond wick structures evaporator section 111 of theheat pipe 10. - In operation, the
evaporator section 111 of theheat pipe 10 is placed in thermal contact with a heat source (not shown) that needs to be cooled. The heat source can, for example, be a central processing unit (CPU) of a computer. The working medium contained in theevaporator section 111 of theheat pipe 10 is vaporized when receiving heat generated by the heat source. The generated vapor moves from theevaporator section 111 via thevapor channels condenser section 113. After the vapor releases its heat and condenses in thecondenser section 113, the condensate is returned by the first andsecond wick structures evaporator section 111 of theheat pipe 10, where the condensate is again available for evaporation. - In the
heat pipe 10, the first andsecond wick structures composite wick structure 17 in thecasing 11. This increases capillary force, and reduces flow resistance and heat resistance. As a result, the condensate is returned to theevaporator section 111 of theheat pipe 10 rapidly, thus preventing potential drying out at theevaporator section 111. In addition, the first andsecond wick structures condenser section 113 and theevaporator section 111, respectively. This enlarges the first andsecond vapor channels condenser sections section heat pipe 10. Furthermore, thefirst wick structures second wick structure 14 at the joint 149 via sintering. Thus, thefirst wick structures second wick structure 14, and the working medium can be rapidly saturated in thesecond wick structure 14 after returning to theevaporator section 111 via thefirst wick structures first wick structures casing 11. This increases the flow of the working media in thecasing 11, and improves the heat transfer performance of theheat pipe 10. - Referring to
FIG. 5 , aheat pipe 20 in accordance with a second embodiment of the disclosure is shown. Theheat pipe 20 differs from theheat pipe 10 of the first embodiment only in that there is only onefirst wick structure 22. Thefirst wick structure 22 is disposed in a center of thecasing 11 within thecondenser section 213. - At the
condenser section 213 of theheat pipe 20, top andbottom walls first wick structure 22 form two contact portions in contact with the inner surface of thecasing 11, respectively. In particular, the contacting inner surface of thecasing 11 includes the top andbottom plates sidewalls first wick structure 22 form two isolated portions isolated from the inner surface of thecasing 11, respectively. Twopassages sidewalls first wick structure 22 and the inner surface of thecasing 11, thepassages first wick structure 22, respectively. The twopassages second vapor channel 242. Ends of thepassages first vapor channel 141 of thesecond wick structure 14. - Referring to
FIG. 6 , aheat pipe 30 in accordance with a third embodiment of the disclosure is shown. Theheat pipe 30 differs from theheat pipe 10 of the first embodiment only in that anotherfirst wick structure 35 is deployed in a center of thecasing 11, for a total of threefirst wick structures first wick structures first wick structure 35 is the same as thefirst wick structure 22 of the second embodiment. - At the
condenser section 313 of theheat pipe 30, theright sidewall 134 of thefirst wick structure 13, theleft sidewall 353 of thefirst wick structure 35, and the inner surface of thecasing 11 cooperatively define apassage 3421 therebetween. Theleft sidewall 123 of thefirst wick structure 12, theright sidewall 354 of thefirst wick structure 35, and the inner surface of thecasing 11 cooperatively define anotherpassage 3422 therebetween. The twopassages second vapor channel 342. Ends of thepassages first vapor channel 141 of thesecond wick structure 14. - Referring to
FIG. 7 , aheat pipe 40 in accordance with a third embodiment of the disclosure is shown. Theheat pipe 40 differs from theheat pipe 10 of the first embodiment only in that asecond wick structure 44 contacts a portion of the inner surface of thecasing 11 at theevaporator section 411 which corresponds to an area of an outside of thecasing 11 designated for contacting a heat-generatingelectronic component 70. In particular, thesecond wick structure 44 is plate-shaped, and contacts an inner surface of thebottom plate 115 of thecasing 11. Theelectronic component 70 contacts an outer surface of thebottom plate 115. Thesecond wick structure 44 and the inner surface of thecasing 11 cooperatively define afirst vapor channel 441 therebetween. More particularly, thesecond wick structure 44, thetop plate 114 and theside plates first vapor channel 441 therebetween. - In the
heat pipe 40, thesecond wick structure 44 contacts a portion of thecasing 11 within theevaporator section 411 corresponding to theelectronic component 70. This enlarges thefirst vapor channel 441 in theevaporator section 411, and further promotes the flow of the working medium in theheat pipe 40. In addition, heat generated by theelectronic component 70 can be rapidly transferred to thesecond wick structure 44 by thecasing 11, whereby the heat transfer performance of theheat pipe 40 is improved. - It is to be understood, however, that even though numerous characteristics and advantages of the present embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201010300332.3 | 2010-01-15 | ||
CN2010103003323A CN101901790A (en) | 2010-01-15 | 2010-01-15 | Flat thin type heat pipe |
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US20110174466A1 true US20110174466A1 (en) | 2011-07-21 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/817,210 Abandoned US20110174466A1 (en) | 2010-01-15 | 2010-06-17 | Flat heat pipe |
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US (1) | US20110174466A1 (en) |
CN (1) | CN101901790A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US20130248152A1 (en) * | 2012-03-22 | 2013-09-26 | Foxconn Technology Co., Ltd. | Heat pipe with one wick structure supporting another wick structure in position |
US20150101192A1 (en) * | 2013-10-15 | 2015-04-16 | Hao Pai | Method of manufacturing ultra thin slab-shaped capillary structure for thermal conduction |
US20160088762A1 (en) * | 2014-09-24 | 2016-03-24 | Furui Precise Component (Kunshan) Co., Ltd. | Electronic device and heat dissipating casing thereof |
US20160153722A1 (en) * | 2014-11-28 | 2016-06-02 | Delta Electronics, Inc. | Heat pipe |
US9618275B1 (en) * | 2012-05-03 | 2017-04-11 | Advanced Cooling Technologies, Inc. | Hybrid heat pipe |
US20180172360A1 (en) * | 2015-07-22 | 2018-06-21 | Furukawa Electric Co., Ltd. | Heat transfer device |
EP3951864A4 (en) * | 2019-04-25 | 2022-06-08 | Huawei Technologies Co., Ltd. | Heat dissipation apparatus, circuit board, and electronic device |
US11454456B2 (en) | 2014-11-28 | 2022-09-27 | Delta Electronics, Inc. | Heat pipe with capillary structure |
US12066256B2 (en) * | 2019-04-11 | 2024-08-20 | Cooler Master Co., Ltd. | Ultra-thin heat pipe and manufacturing method of the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111306972A (en) * | 2014-11-28 | 2020-06-19 | 台达电子工业股份有限公司 | Heat pipe |
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US20070089864A1 (en) * | 2005-10-24 | 2007-04-26 | Foxconn Technology Co., Ltd. | Heat pipe with composite wick structure |
US20090084526A1 (en) * | 2007-09-28 | 2009-04-02 | Foxconn Technology Co., Ltd. | Heat pipe with composite wick structure |
US20090308576A1 (en) * | 2008-06-17 | 2009-12-17 | Wang Cheng-Tu | Heat pipe with a dual capillary structure and manufacturing method thereof |
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2010
- 2010-01-15 CN CN2010103003323A patent/CN101901790A/en active Pending
- 2010-06-17 US US12/817,210 patent/US20110174466A1/en not_active Abandoned
Patent Citations (3)
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US20070089864A1 (en) * | 2005-10-24 | 2007-04-26 | Foxconn Technology Co., Ltd. | Heat pipe with composite wick structure |
US20090084526A1 (en) * | 2007-09-28 | 2009-04-02 | Foxconn Technology Co., Ltd. | Heat pipe with composite wick structure |
US20090308576A1 (en) * | 2008-06-17 | 2009-12-17 | Wang Cheng-Tu | Heat pipe with a dual capillary structure and manufacturing method thereof |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130248152A1 (en) * | 2012-03-22 | 2013-09-26 | Foxconn Technology Co., Ltd. | Heat pipe with one wick structure supporting another wick structure in position |
US9618275B1 (en) * | 2012-05-03 | 2017-04-11 | Advanced Cooling Technologies, Inc. | Hybrid heat pipe |
US20150101192A1 (en) * | 2013-10-15 | 2015-04-16 | Hao Pai | Method of manufacturing ultra thin slab-shaped capillary structure for thermal conduction |
US9717162B2 (en) * | 2014-09-24 | 2017-07-25 | Furui Precise Component (Kunshan) Co., Ltd. | Electronic device and heat dissipating casing thereof |
US20160088762A1 (en) * | 2014-09-24 | 2016-03-24 | Furui Precise Component (Kunshan) Co., Ltd. | Electronic device and heat dissipating casing thereof |
US11454456B2 (en) | 2014-11-28 | 2022-09-27 | Delta Electronics, Inc. | Heat pipe with capillary structure |
US20160153722A1 (en) * | 2014-11-28 | 2016-06-02 | Delta Electronics, Inc. | Heat pipe |
US11892243B2 (en) | 2014-11-28 | 2024-02-06 | Delta Electronics, Inc. | Heat pipe with capillary structure |
US20180172360A1 (en) * | 2015-07-22 | 2018-06-21 | Furukawa Electric Co., Ltd. | Heat transfer device |
US10458720B2 (en) * | 2015-07-22 | 2019-10-29 | Furukawa Electric Co., Ltd. | Heat transfer device |
US12066256B2 (en) * | 2019-04-11 | 2024-08-20 | Cooler Master Co., Ltd. | Ultra-thin heat pipe and manufacturing method of the same |
EP3951864A4 (en) * | 2019-04-25 | 2022-06-08 | Huawei Technologies Co., Ltd. | Heat dissipation apparatus, circuit board, and electronic device |
US12041710B2 (en) | 2019-04-25 | 2024-07-16 | Huawei Technologies Co., Ltd. | Heat dissipation apparatus, circuit board, and electronic device |
Also Published As
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Legal Events
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---|---|---|---|
AS | Assignment |
Owner name: FOXCONN TECHNOLOGY CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIU, YUE;DAI, SHENG-LIANG;LIU, JIN-PENG;AND OTHERS;REEL/FRAME:024548/0360 Effective date: 20100605 Owner name: FURUI PRECISE COMPONENT (KUNSHAN) CO., LTD., CHINA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIU, YUE;DAI, SHENG-LIANG;LIU, JIN-PENG;AND OTHERS;REEL/FRAME:024548/0360 Effective date: 20100605 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |