CA1129406A - Device for releasing heat - Google Patents
Device for releasing heatInfo
- Publication number
- CA1129406A CA1129406A CA352,099A CA352099A CA1129406A CA 1129406 A CA1129406 A CA 1129406A CA 352099 A CA352099 A CA 352099A CA 1129406 A CA1129406 A CA 1129406A
- Authority
- CA
- Canada
- Prior art keywords
- heat
- straight tubular
- pipe
- fins
- tubular portions
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49377—Tube with heat transfer means
- Y10T29/49378—Finned tube
Abstract
TITLE OF THE INVENTION
DEVICE FOR RELEASING HEAT
ABSTRACT OF THE DISCLOSURE
A heat releasing device comprising a heat transmitting block having a heat source attaching portion and a bore extending therethrough, a looped heat pipe having at least one pair of straight tubular portions, the first of the straight tubular portions being intimately fitted in the bore, and a multiplicity of radiating fins attached to the heat pipe.
DEVICE FOR RELEASING HEAT
ABSTRACT OF THE DISCLOSURE
A heat releasing device comprising a heat transmitting block having a heat source attaching portion and a bore extending therethrough, a looped heat pipe having at least one pair of straight tubular portions, the first of the straight tubular portions being intimately fitted in the bore, and a multiplicity of radiating fins attached to the heat pipe.
Description
~294~6 BAC~GROUND OF THE INVENTION
The present invention relates to a device for releasing heat, and more particularly to a heat sinl~ to be attached to an a~paratus incor~oratin~ transistors, IC circuits, etc. for effectively dissipating the heat emitted therefrom.
Heat releasing devices of this type are chiefly made of extruded shaped materials. While they are easy to manufac-ture, the extrusion technique involves the requirement that the main body of the device as well as the fin portions thereof should have a substantial wall thickness. Other heat releasing devices are also known which co~prise a straight heat pipe. These devlces are smaller but have a higher radiation efficiency than those made of extruded material. However since a heat source attaching block is fixed to a portion of the pipe, the device has a somewhat reduced radiation efficiency at this portion.
SUMMARY OF TH~ INVENTION
The present invention has been accomplished in view of the above problcms. An object of the invention is to provide a heat releasing device which has the advantage Or those co~prising a straight heat pipe but is free of the drawback thereof and which has
The present invention relates to a device for releasing heat, and more particularly to a heat sinl~ to be attached to an a~paratus incor~oratin~ transistors, IC circuits, etc. for effectively dissipating the heat emitted therefrom.
Heat releasing devices of this type are chiefly made of extruded shaped materials. While they are easy to manufac-ture, the extrusion technique involves the requirement that the main body of the device as well as the fin portions thereof should have a substantial wall thickness. Other heat releasing devices are also known which co~prise a straight heat pipe. These devlces are smaller but have a higher radiation efficiency than those made of extruded material. However since a heat source attaching block is fixed to a portion of the pipe, the device has a somewhat reduced radiation efficiency at this portion.
SUMMARY OF TH~ INVENTION
The present invention has been accomplished in view of the above problcms. An object of the invention is to provide a heat releasing device which has the advantage Or those co~prising a straight heat pipe but is free of the drawback thereof and which has
-2-~.
. . .. ... ,, , . ~ . .
~1294~6 a high heat releasing efficiency.
The invention provides a heat releasing device of heat pipe type comprising a looped pipe having at least a pair of parallel straight tubular portions, a heat transmitting block to be connected to a heat source and radiating fins fixedly attached to the pipe, the pipe having an inner portion in which a working fluid in gaseous and liquid phases is sealingly enclosed, one of the straight tubular portions being positioned higher than the other while bent portions connecting the straight tubular portions are inclined when seen in side view, the upper straight tubular portion serving as a condenser and the lower one as an evaporator.
The looped heat pipe is not limited in its overall shape insofar as the pipe has at least one pair of straight tubular portions. For example, the heat pipe is in the form of an elongated loop comprising a hairpin tube and a U-shaped tube which are joined together at their opposed abutting ends, or in the form of a bent loop L-shaped in its entirety and comprising a pair of hairpin tubes and a pair of bent tubes interconnecting the hairpin tubes.
The heat pipe may be of the wick type or of the gravity type. Useful working fluids are those B
l~LZ9~
~ener~lly used, such as water, a~nonia, methanol and the lil{e .
The radiating fins are usually square or rectangular but are not limited to such a shape.
This invention will be described beloY. in greater detail with reference to the illustrated embodiments-i1ith these embodiments, the reference to the posi-l;ion or orientation thereof is based on Figs. 2, 7 and 9. The upper side of these drawings is designated as the upper side of the device, and the left side of the drawings as the front side of the device.
BRIEF DESCRIPTION OF THE DRAWINGS
_ 5~
E`ig. l is a front view showing a heat releasing device according to a first embodiment;
Fig. 2 is a view in section ta1cen along the line II-II in F.ig. l;
E~`ig. 3 is a view partly in vertical section and showing the device in operation;
Fig. ~ tA) is a front vicw showing a devicc oY thc wic1c type as used in an inclined position;
E`ig. 4 (B) is a side elevation corresponding to Fig. 4 (A);
Fig. 5 (A) is a front view showing a device of 11294~6 the gravity type as used in an inclined position;
~ ig. 5 (B) is a side elevation corresponding to Fig. 5 (A);
~ 'ig. 6 is a front vie~ showing a heat releasing device according to a second embodiment;
Fig. 7 is a side ~levation correspondin~ to Fig. 6;
Fig. 8 is a plan view showing a heat releasing device according to a third embodiment; and ~ig. 9 is a view in section taken along the line IX-IX in ~`ig. 8.
DESCRIPTION 0~ THE PRE~ERRED EM~ODI~ENTS
Figs. 1 to 5 show a first embodiment of the invention.
Wi-th reference to i~`i.gs. 1 and 2, a heat pipe 1 serving as the main body of a heat relea~ing device of the invention comprises a hairpin tube 2 and a U-shaped tube 3 which are joined to~ether by bu-tt welding in the form of a greatly elongatcd loop. Indicated at 4 are square fins attached to the heat pipe 1, and at 5 are rectangular fins attached to -the middle portion of the length of the heat pipe 1 and in the form of one half of the square fin 4. The square fins 4, as well as the rectangular fins 5, are arranged at specified spacing.
1129g~
l`'1e s~uare f`in ~ has a pair of holes 6 Ior passin~ a pair Or s-tr~i~;h-t tubular por-tions 1~ and lb of the heat pipe 1, and a collar 7 around each of the ho3ec 6. The rec-tan~ular fin 5 has a hole 8 throu~h wllich the upper tubular portion la of the heat pipe e~tends, and ~
collar 9 around the hole 8.~ The diameter of the holes 6 and 8 coincides with the outside dic~neter of the heat pipe 1. The center-to-center distance between the pair OI holes 6 is of course equal to the center-to-center distance between the pair of strai~ht tubular portions la and lb of the heat pipe 1. A heat transmitting block 10 of square cross section is mounted on the middle of the len~th of the lor/er strai~ht tubular portion lb of the pipe 1 and has Q heat source attachin~ ortion lOa projecting rearY~ard from a lower part of the block.
The lower straight tubular por-tion lb is inti~.ately fitted in a bore 11 extending through the bloc.k 10 longitudinally thereof. A pair of side plates 12 are provided at oppos.ite ends o~ the heat pipe 1, with the group of fins dispoc,cd therebctwecn. An inlet 13 for a worlcin~ fluid is formed in a bent portion of the pipe 1. The fins ~ and 5, the heat transMittirg block 10 and the pair of side plates 12 are of course attached to the heat pipe 1 before the U-shaped tube 3 is joined to the hairpin tube 2. Preferably -the hairpin :, . ' .
'~ ` ' ~ `
~129~(~6 tube 2 i~, dic~netrically enlarged before bein~ joined to t~le tube 3 and is thel~e~y held in intin~ate contact with the collars 7, 9 of the fins 4, 5, the blocl; 10 and the side pla-tes 12. ~he worhin~ fluid is of cou-rse enclosed in the pi~e after the ~oining.
The heat releasin~ device of this embodiment i~ usually cO disposed that the pair of strai~ht tubular portions la and lb are horizontal as seen in E'i~. 1, with the bent opposite ends in an inclined position when seen from one side as shown in Fi~. 2.
Fig. 3 shows the heat pipe in operation. The . o.~ c.~o r~for working fluid 'N in the heating portion, n~ely, in the lower tubular portion lb i~ vaporized with the hea-t dellvered thereto from a heat source, such as transistors, throu~ the heat transmittin~ block 10 and flows through the bent ends to the heat releasing portion, namely, to the upper tubular portion la as indicated by broken-line co~7~1c~7~e~
arrows A in ~i~. 3. In this~ portion the vapor of fluid W releases heat, rcturns to a liquid and flows back to the heating portion alon~ the inner surface of the pipe a5 indlcated in solid-line arrows B in the drawing. In this way the heat pipc opcratcs for the dissipation of heat.
The heat releasing device of this invention is usable in an inclined positiorl as it is seen sideways ... .. .. . . . .
1~294C16 and also as it is seen fror.~ the front, as ShO';;I' in Fi~s. 4 and 5. ~i~s. 4 (~) and (B) sho~. a device of the wic!{ ty~e having a ~.ick 14 housed only in the lo-;er strai~ht tubular ?ortion lb serving as the he~ tin~
portion. The upper strai~ht tubular ?ortion la, namely, the heat releasin~ portion Qperates as a heat yipe of the ravity type involvin~ reduced thermal resistance.
The wick-type heat pipe of ~i. 4 is service2ble for th.e desired heat transfer also in a horizontal position as lt is seen from the front. ~igs. 5 (A) and (B) show a heat pipe of the gravity type. In this ease, a somewhat lar~er amount of workin~ fluid \~' ic~ enclosed in the pipe, or -the heat transmitting bloclc 10 is posltioned closer to the downwardly incli.ned lo~er end of the pipe so -that the portion of the pipe bearing on the bloc}s lO will be in contact with the worlcin~ fluid W at all tirnes even if the tubular portions la, lb are incl.ined.
With refe.renee to ~ s. 6 and 7 showing a seeond embodiment c:r the i.nvent;ion, a substantially reetang~ula.r parillle.l.epipe~lal, heilt transmitti~g bloek 21 has a bore 22 longitudinally exte-lcling throu~h an upper portion of the bloelc and is formed, in its bottom, with a number of serew bores 23 for attachin a heat souree to the bloclc. Thus the bot;tom portion serves as a heat souree attaehing portion 21a. A heat pipe 24 is in the .. ... - . ... s . .. .... , . . . . . , . .. ... .. . ... . ~ .. . . ... ... ... .. .
11294~p~
~orril o~` an elon~ated loop and com~rises a hairpin tube 25 and a U-shaped tube 26 which are ~oined to~etller at their opposed abutting ends. Before they arc joined to~et"er, one straight tubular nortion 25a of t~le hairpin tube 25 is passed through the bore 22 oi` t~le block 21 and thereafter dia~etrically enlar~ed into intimate contact with the inner surface defining the bore 22 A multiplicity of substantially rectangular radiatin~ fins 27 each have a hole 28 of specified diameter appro~i.mately in the center and a collar 29 around;the hole 28. Each of the fins 27 has a rectangular cutout 30 at its front loYier corner. The fins 27 are attached to the o-ther strai~ht tubular portion 25b of the hairpin tube 25 as equidistantly spaced apart thereon in the folloving manner. The fins 27 are fltted at the holes 28 around the tubular portion 25b as arranged at specified spacing thereon and brought into contact with the rear surface and the top surface of the bloclc 21 ~t. the cutout portions 30. The tubular portions 25b is thereafter dic~metrically enlarged and thereby held in intimate contact with the collars 29 of the fins 27. A pair of side plates 31 provided on opposite sides of the group of fins 27 are mounted on opposite ends of the heat pipe 24 for the installa-tion of the device and are secured to the ends of the block 21 _g_ .. ~ .. ~.~.. ... .... . ...... . .
.
, .
llZ9~6 t~ith scrcws 32: The pair of side pl(~ tes 31 eacll have a bent lower end por-tion 3].a e~-te-.dln~ out~iard toward the extremity of the heat pipe 2~ ereby the device ic. attached to the frame of` an audio a?paratus or the like ~1ith screws. Indicated a-~ 33 is an inlet formed in the U-shaped tube~26 for t~e ~.orl-ing fluid.
After the hairpin tube 25 has been joined to the U-shaped tube 26, the fluid is introduced into the heat pipe through the inlet 33, which is thereafter sealed.
. With the present embodiment, the radia-ting fins 27 are held in contact with the blocl; 21 at the cutout portions 30, at ~vhich the hea'~ delivered to the block 21 i9 partly transferred direc~ly to the fins 27 for the release of heat. The cutout ?ortions 30 also prevent the fins from turning about t'ne uppcr tubular por-tion 25b.
Figs. 8 and 9 show a third e~.bodi~.ent of the invention. With reference to these clrawin~s, a heat tran'smitting block 41 is in the form of a cha.rnel member positioned ~lith its one sidc do~n ar; sccn in ~ig. 9.
'~he block 41 has a bore 42 longitudinally extendin~
through a lower portion thcreof` and defined by a jag~ed inner peripheral surI`acc 43 havin~ rides of triangular cross section. ~n uppcr sidc rcar portion and the rear side of the block 41 have jagged surfaces 45 and 45, .. . . .
llZ94(~6 respec-tively, of serrated cross section 1`or dissipating the hea-t delivered to the block 41, for exam~le, from transistors or the like. The bloch 41 has at an upper side front portion thereof a heat source att~chin~
portion, to ~hich transistors T, serving as a heat source, are a~tached with screws driven into bores 47.
A looped heat pipe 48 i~ bent appro~-imately to an ~-shape ~hen seen in plan and comprises first and second hairpin tubes 49 and 50 in a pair and a pair of bent tubes 51 and 52 interconnectin~ the hairpin tubes at their opposed abutting ends. Before the tubes are joined to~ether, one straigh-t tubular portion (herein-after referred to as "first straight tubular portion") 49a of the first hairpin tube 49 is inserted through the bore 42 of the block 41 and thereafter diametrically enlarged into intimate contact with the jag~ed surface 43 definin~ the bore 42. A multiplicity of first radiating fins 53 for the first hairpin tube 49 are each in the forM of an appro~imately rectan~ular plate. Each of the fins 53 has a center hole 54 and a rnarginal hole 55 of specified diamcter and collars 56 and 57 around the holes 54 and 55 respcctively. With the other straight tubular portion (hereinafter referred to as "second straight tubular portion") 49b of the first hairpin tube 49 fitted in the center holes 54, the first fins 53 are .. .. .. ... . . .. . . . . . .
.
1~9~(~6 arranged or th~ second strai~:ht tubular poltion 49b at ~pecified spacing first, and the second tu~llar portion 49b is thereafter diametrically enlar~-~ed into intimate con..act with the collars 56, whereby the first fins 53 are attached to the second tubular portion 49b. ~ turn preventin~ member 58 extend$ through the mar~inal holes 55 of the first fins 53. Although a strai~ht tube having the same diameter as the heat pipe 4S s used as the member 58 in the present embodiment, the member 5S
may of course be in the form of a rod. A ~ultipli.city of radiating fins 59 are mounted on the second hairpin tube 50 of the heat pipe 48. ~`irst.the fins 59 are arranged on the second hairpin tube 50 at specified spacing, with a pair of straight tubular por-tions 50a and 50b of the tube 50 extending throu~ holes 60 and 61 respectively, and the tube 50 is thereafter dia!~letrlcally enlarged into intimate contact with the fins 59. Pairs of side plates 64 and 65 for the .insta:Llation of the device are mounted on the first and second hairpin tubes 49 and 50, with thc firs-t and second ~roups of fins 53 and 59 provided thercbetween. The side plates have bcnt end portions 6~ and 65a for attaching the device to thc fraMe of an a~dio apparat~s or the like with screws. An inlet 66 for the worlcing fluid is formed in a bent portion of the second hairpin tube 50.
~1~9~6 ~fter the first and second hair~in tubes ~Y and 50 have been connected together by the pair of intervenin~
bent tubes 51 and 52, the working fluid is introduced in-to -the pipe 48 throutc;h the inlet 66, whlch is thereafter closed.
~ '~ith this embodimènt, the fins 53 are effectively prevented from turning about the second straight tubular portion 49b by the turn preventing member 58 e~tencling through the group of fins 53. The ja~ged surface 43 defining the bore 42 serves to release heat direct:Ly frol-n the block 41.
. .... ~ ~ , . .... ..
-
. . .. ... ,, , . ~ . .
~1294~6 a high heat releasing efficiency.
The invention provides a heat releasing device of heat pipe type comprising a looped pipe having at least a pair of parallel straight tubular portions, a heat transmitting block to be connected to a heat source and radiating fins fixedly attached to the pipe, the pipe having an inner portion in which a working fluid in gaseous and liquid phases is sealingly enclosed, one of the straight tubular portions being positioned higher than the other while bent portions connecting the straight tubular portions are inclined when seen in side view, the upper straight tubular portion serving as a condenser and the lower one as an evaporator.
The looped heat pipe is not limited in its overall shape insofar as the pipe has at least one pair of straight tubular portions. For example, the heat pipe is in the form of an elongated loop comprising a hairpin tube and a U-shaped tube which are joined together at their opposed abutting ends, or in the form of a bent loop L-shaped in its entirety and comprising a pair of hairpin tubes and a pair of bent tubes interconnecting the hairpin tubes.
The heat pipe may be of the wick type or of the gravity type. Useful working fluids are those B
l~LZ9~
~ener~lly used, such as water, a~nonia, methanol and the lil{e .
The radiating fins are usually square or rectangular but are not limited to such a shape.
This invention will be described beloY. in greater detail with reference to the illustrated embodiments-i1ith these embodiments, the reference to the posi-l;ion or orientation thereof is based on Figs. 2, 7 and 9. The upper side of these drawings is designated as the upper side of the device, and the left side of the drawings as the front side of the device.
BRIEF DESCRIPTION OF THE DRAWINGS
_ 5~
E`ig. l is a front view showing a heat releasing device according to a first embodiment;
Fig. 2 is a view in section ta1cen along the line II-II in F.ig. l;
E~`ig. 3 is a view partly in vertical section and showing the device in operation;
Fig. ~ tA) is a front vicw showing a devicc oY thc wic1c type as used in an inclined position;
E`ig. 4 (B) is a side elevation corresponding to Fig. 4 (A);
Fig. 5 (A) is a front view showing a device of 11294~6 the gravity type as used in an inclined position;
~ ig. 5 (B) is a side elevation corresponding to Fig. 5 (A);
~ 'ig. 6 is a front vie~ showing a heat releasing device according to a second embodiment;
Fig. 7 is a side ~levation correspondin~ to Fig. 6;
Fig. 8 is a plan view showing a heat releasing device according to a third embodiment; and ~ig. 9 is a view in section taken along the line IX-IX in ~`ig. 8.
DESCRIPTION 0~ THE PRE~ERRED EM~ODI~ENTS
Figs. 1 to 5 show a first embodiment of the invention.
Wi-th reference to i~`i.gs. 1 and 2, a heat pipe 1 serving as the main body of a heat relea~ing device of the invention comprises a hairpin tube 2 and a U-shaped tube 3 which are joined to~ether by bu-tt welding in the form of a greatly elongatcd loop. Indicated at 4 are square fins attached to the heat pipe 1, and at 5 are rectangular fins attached to -the middle portion of the length of the heat pipe 1 and in the form of one half of the square fin 4. The square fins 4, as well as the rectangular fins 5, are arranged at specified spacing.
1129g~
l`'1e s~uare f`in ~ has a pair of holes 6 Ior passin~ a pair Or s-tr~i~;h-t tubular por-tions 1~ and lb of the heat pipe 1, and a collar 7 around each of the ho3ec 6. The rec-tan~ular fin 5 has a hole 8 throu~h wllich the upper tubular portion la of the heat pipe e~tends, and ~
collar 9 around the hole 8.~ The diameter of the holes 6 and 8 coincides with the outside dic~neter of the heat pipe 1. The center-to-center distance between the pair OI holes 6 is of course equal to the center-to-center distance between the pair of strai~ht tubular portions la and lb of the heat pipe 1. A heat transmitting block 10 of square cross section is mounted on the middle of the len~th of the lor/er strai~ht tubular portion lb of the pipe 1 and has Q heat source attachin~ ortion lOa projecting rearY~ard from a lower part of the block.
The lower straight tubular por-tion lb is inti~.ately fitted in a bore 11 extending through the bloc.k 10 longitudinally thereof. A pair of side plates 12 are provided at oppos.ite ends o~ the heat pipe 1, with the group of fins dispoc,cd therebctwecn. An inlet 13 for a worlcin~ fluid is formed in a bent portion of the pipe 1. The fins ~ and 5, the heat transMittirg block 10 and the pair of side plates 12 are of course attached to the heat pipe 1 before the U-shaped tube 3 is joined to the hairpin tube 2. Preferably -the hairpin :, . ' .
'~ ` ' ~ `
~129~(~6 tube 2 i~, dic~netrically enlarged before bein~ joined to t~le tube 3 and is thel~e~y held in intin~ate contact with the collars 7, 9 of the fins 4, 5, the blocl; 10 and the side pla-tes 12. ~he worhin~ fluid is of cou-rse enclosed in the pi~e after the ~oining.
The heat releasin~ device of this embodiment i~ usually cO disposed that the pair of strai~ht tubular portions la and lb are horizontal as seen in E'i~. 1, with the bent opposite ends in an inclined position when seen from one side as shown in Fi~. 2.
Fig. 3 shows the heat pipe in operation. The . o.~ c.~o r~for working fluid 'N in the heating portion, n~ely, in the lower tubular portion lb i~ vaporized with the hea-t dellvered thereto from a heat source, such as transistors, throu~ the heat transmittin~ block 10 and flows through the bent ends to the heat releasing portion, namely, to the upper tubular portion la as indicated by broken-line co~7~1c~7~e~
arrows A in ~i~. 3. In this~ portion the vapor of fluid W releases heat, rcturns to a liquid and flows back to the heating portion alon~ the inner surface of the pipe a5 indlcated in solid-line arrows B in the drawing. In this way the heat pipc opcratcs for the dissipation of heat.
The heat releasing device of this invention is usable in an inclined positiorl as it is seen sideways ... .. .. . . . .
1~294C16 and also as it is seen fror.~ the front, as ShO';;I' in Fi~s. 4 and 5. ~i~s. 4 (~) and (B) sho~. a device of the wic!{ ty~e having a ~.ick 14 housed only in the lo-;er strai~ht tubular ?ortion lb serving as the he~ tin~
portion. The upper strai~ht tubular ?ortion la, namely, the heat releasin~ portion Qperates as a heat yipe of the ravity type involvin~ reduced thermal resistance.
The wick-type heat pipe of ~i. 4 is service2ble for th.e desired heat transfer also in a horizontal position as lt is seen from the front. ~igs. 5 (A) and (B) show a heat pipe of the gravity type. In this ease, a somewhat lar~er amount of workin~ fluid \~' ic~ enclosed in the pipe, or -the heat transmitting bloclc 10 is posltioned closer to the downwardly incli.ned lo~er end of the pipe so -that the portion of the pipe bearing on the bloc}s lO will be in contact with the worlcin~ fluid W at all tirnes even if the tubular portions la, lb are incl.ined.
With refe.renee to ~ s. 6 and 7 showing a seeond embodiment c:r the i.nvent;ion, a substantially reetang~ula.r parillle.l.epipe~lal, heilt transmitti~g bloek 21 has a bore 22 longitudinally exte-lcling throu~h an upper portion of the bloelc and is formed, in its bottom, with a number of serew bores 23 for attachin a heat souree to the bloclc. Thus the bot;tom portion serves as a heat souree attaehing portion 21a. A heat pipe 24 is in the .. ... - . ... s . .. .... , . . . . . , . .. ... .. . ... . ~ .. . . ... ... ... .. .
11294~p~
~orril o~` an elon~ated loop and com~rises a hairpin tube 25 and a U-shaped tube 26 which are ~oined to~etller at their opposed abutting ends. Before they arc joined to~et"er, one straight tubular nortion 25a of t~le hairpin tube 25 is passed through the bore 22 oi` t~le block 21 and thereafter dia~etrically enlar~ed into intimate contact with the inner surface defining the bore 22 A multiplicity of substantially rectangular radiatin~ fins 27 each have a hole 28 of specified diameter appro~i.mately in the center and a collar 29 around;the hole 28. Each of the fins 27 has a rectangular cutout 30 at its front loYier corner. The fins 27 are attached to the o-ther strai~ht tubular portion 25b of the hairpin tube 25 as equidistantly spaced apart thereon in the folloving manner. The fins 27 are fltted at the holes 28 around the tubular portion 25b as arranged at specified spacing thereon and brought into contact with the rear surface and the top surface of the bloclc 21 ~t. the cutout portions 30. The tubular portions 25b is thereafter dic~metrically enlarged and thereby held in intimate contact with the collars 29 of the fins 27. A pair of side plates 31 provided on opposite sides of the group of fins 27 are mounted on opposite ends of the heat pipe 24 for the installa-tion of the device and are secured to the ends of the block 21 _g_ .. ~ .. ~.~.. ... .... . ...... . .
.
, .
llZ9~6 t~ith scrcws 32: The pair of side pl(~ tes 31 eacll have a bent lower end por-tion 3].a e~-te-.dln~ out~iard toward the extremity of the heat pipe 2~ ereby the device ic. attached to the frame of` an audio a?paratus or the like ~1ith screws. Indicated a-~ 33 is an inlet formed in the U-shaped tube~26 for t~e ~.orl-ing fluid.
After the hairpin tube 25 has been joined to the U-shaped tube 26, the fluid is introduced into the heat pipe through the inlet 33, which is thereafter sealed.
. With the present embodiment, the radia-ting fins 27 are held in contact with the blocl; 21 at the cutout portions 30, at ~vhich the hea'~ delivered to the block 21 i9 partly transferred direc~ly to the fins 27 for the release of heat. The cutout ?ortions 30 also prevent the fins from turning about t'ne uppcr tubular por-tion 25b.
Figs. 8 and 9 show a third e~.bodi~.ent of the invention. With reference to these clrawin~s, a heat tran'smitting block 41 is in the form of a cha.rnel member positioned ~lith its one sidc do~n ar; sccn in ~ig. 9.
'~he block 41 has a bore 42 longitudinally extendin~
through a lower portion thcreof` and defined by a jag~ed inner peripheral surI`acc 43 havin~ rides of triangular cross section. ~n uppcr sidc rcar portion and the rear side of the block 41 have jagged surfaces 45 and 45, .. . . .
llZ94(~6 respec-tively, of serrated cross section 1`or dissipating the hea-t delivered to the block 41, for exam~le, from transistors or the like. The bloch 41 has at an upper side front portion thereof a heat source att~chin~
portion, to ~hich transistors T, serving as a heat source, are a~tached with screws driven into bores 47.
A looped heat pipe 48 i~ bent appro~-imately to an ~-shape ~hen seen in plan and comprises first and second hairpin tubes 49 and 50 in a pair and a pair of bent tubes 51 and 52 interconnectin~ the hairpin tubes at their opposed abutting ends. Before the tubes are joined to~ether, one straigh-t tubular portion (herein-after referred to as "first straight tubular portion") 49a of the first hairpin tube 49 is inserted through the bore 42 of the block 41 and thereafter diametrically enlarged into intimate contact with the jag~ed surface 43 definin~ the bore 42. A multiplicity of first radiating fins 53 for the first hairpin tube 49 are each in the forM of an appro~imately rectan~ular plate. Each of the fins 53 has a center hole 54 and a rnarginal hole 55 of specified diamcter and collars 56 and 57 around the holes 54 and 55 respcctively. With the other straight tubular portion (hereinafter referred to as "second straight tubular portion") 49b of the first hairpin tube 49 fitted in the center holes 54, the first fins 53 are .. .. .. ... . . .. . . . . . .
.
1~9~(~6 arranged or th~ second strai~:ht tubular poltion 49b at ~pecified spacing first, and the second tu~llar portion 49b is thereafter diametrically enlar~-~ed into intimate con..act with the collars 56, whereby the first fins 53 are attached to the second tubular portion 49b. ~ turn preventin~ member 58 extend$ through the mar~inal holes 55 of the first fins 53. Although a strai~ht tube having the same diameter as the heat pipe 4S s used as the member 58 in the present embodiment, the member 5S
may of course be in the form of a rod. A ~ultipli.city of radiating fins 59 are mounted on the second hairpin tube 50 of the heat pipe 48. ~`irst.the fins 59 are arranged on the second hairpin tube 50 at specified spacing, with a pair of straight tubular por-tions 50a and 50b of the tube 50 extending throu~ holes 60 and 61 respectively, and the tube 50 is thereafter dia!~letrlcally enlarged into intimate contact with the fins 59. Pairs of side plates 64 and 65 for the .insta:Llation of the device are mounted on the first and second hairpin tubes 49 and 50, with thc firs-t and second ~roups of fins 53 and 59 provided thercbetween. The side plates have bcnt end portions 6~ and 65a for attaching the device to thc fraMe of an a~dio apparat~s or the like with screws. An inlet 66 for the worlcing fluid is formed in a bent portion of the second hairpin tube 50.
~1~9~6 ~fter the first and second hair~in tubes ~Y and 50 have been connected together by the pair of intervenin~
bent tubes 51 and 52, the working fluid is introduced in-to -the pipe 48 throutc;h the inlet 66, whlch is thereafter closed.
~ '~ith this embodimènt, the fins 53 are effectively prevented from turning about the second straight tubular portion 49b by the turn preventing member 58 e~tencling through the group of fins 53. The ja~ged surface 43 defining the bore 42 serves to release heat direct:Ly frol-n the block 41.
. .... ~ ~ , . .... ..
-
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A heat releasing device of heat pipe type comprising a looped pipe having at least a pair of parallel straight tubular portions, a heat transmitting block to be connected to a heat source and radiating fins fixedly attached to the pipe, the pipe having an inner portion in which a working fluid in gaseous and liquid phases is sealingly enclosed, one of the straight tubular portions being positioned higher than the other while bent portions connecting the straight tubular portions are inclined when seen in side view, the upper straight tubular portion serving as a condenser and the lower one as an evaporator.
2. A device as defined in claim 1 wherein the heat pipe comprises a hairpin tube and a U-shaped tube joined together by butt welding in the form of an elongated loop.
3. A device as defined in claim 1 wherein a first straight tubular portion is fitted in the bore of the heat transmitting block by being inserted into the bore and thereafter diametrically enlarged.
4. A device as defined in claim 1 wherein each of the radiating fins has a cutout, is attached only to one of the straight tubular portions of the heat pipe and is in contact with the heat transmitting block at the cutout portion.
5. A device as defined in claim 1 wherein the radiating fins are attached only to said one of the straight tubular portions of the heat pipe, and a turn preventing member extends through the fins.
6. A device as defined in claim 3 wherein the bore of the heat transmitting block is defined by a jagged surface for releasing heat.
7. A device as defined in any one of claims 1 to 3 wherein the heat transmitting block has a jagged heat releasing surface on each of its upper side and rear side.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP80102762A EP0040255B1 (en) | 1980-05-19 | 1980-05-19 | Heat releasing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1129406A true CA1129406A (en) | 1982-08-10 |
Family
ID=8186683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA352,099A Expired CA1129406A (en) | 1980-05-19 | 1980-05-16 | Device for releasing heat |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4724901A (en) |
| EP (1) | EP0040255B1 (en) |
| CA (1) | CA1129406A (en) |
| DE (1) | DE3064897D1 (en) |
Families Citing this family (40)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1105745A1 (en) * | 1982-12-15 | 1984-07-30 | Институт тепло- и массообмена им.А.В.Лыкова | Heat pipe |
| US4567351A (en) * | 1983-08-10 | 1986-01-28 | Matsushita Electric Works, Ltd. | Electric space heater employing a vaporizable heat exchange fluid |
| DE3819535C2 (en) * | 1987-06-12 | 2002-02-28 | Mitsubishi Electric Corp | heat exchangers |
| GB2213920B (en) * | 1987-12-18 | 1991-11-27 | William Armond Dunne | Cooling system |
| US4873613A (en) * | 1988-11-25 | 1989-10-10 | Iversen Arthur H | Compact high power modular RF semi-conductor systems packaging |
| US6184578B1 (en) * | 1990-02-28 | 2001-02-06 | Hughes Electronics Corporation | Graphite composite heat pipe |
| US5285347A (en) * | 1990-07-02 | 1994-02-08 | Digital Equipment Corporation | Hybird cooling system for electronic components |
| US5845702A (en) * | 1992-06-30 | 1998-12-08 | Heat Pipe Technology, Inc. | Serpentine heat pipe and dehumidification application in air conditioning systems |
| US5921315A (en) * | 1995-06-07 | 1999-07-13 | Heat Pipe Technology, Inc. | Three-dimensional heat pipe |
| JPH098190A (en) * | 1995-06-22 | 1997-01-10 | Calsonic Corp | Cooling device for electronic component |
| US6623279B2 (en) | 1999-07-15 | 2003-09-23 | Incep Technologies, Inc. | Separable power delivery connector |
| US20030214800A1 (en) * | 1999-07-15 | 2003-11-20 | Dibene Joseph Ted | System and method for processor power delivery and thermal management |
| US6847529B2 (en) * | 1999-07-15 | 2005-01-25 | Incep Technologies, Inc. | Ultra-low impedance power interconnection system for electronic packages |
| US20030156400A1 (en) * | 1999-07-15 | 2003-08-21 | Dibene Joseph Ted | Method and apparatus for providing power to a microprocessor with intergrated thermal and EMI management |
| US6947293B2 (en) * | 1999-07-15 | 2005-09-20 | Incep Technologies | Method and apparatus for providing power to a microprocessor with integrated thermal and EMI management |
| US6801431B2 (en) * | 1999-07-15 | 2004-10-05 | Incep Technologies, Inc. | Integrated power delivery and cooling system for high power microprocessors |
| US6490160B2 (en) * | 1999-07-15 | 2002-12-03 | Incep Technologies, Inc. | Vapor chamber with integrated pin array |
| US6315033B1 (en) * | 2000-05-22 | 2001-11-13 | Jia Hao Li | Heat dissipating conduit |
| US6504721B1 (en) * | 2000-09-29 | 2003-01-07 | Intel Corporation | Thermal cooling apparatus |
| US7167379B2 (en) * | 2001-02-16 | 2007-01-23 | Dibene Ii Joseph T | Micro-spring interconnect systems for low impedance high power applications |
| US6388882B1 (en) | 2001-07-19 | 2002-05-14 | Thermal Corp. | Integrated thermal architecture for thermal management of high power electronics |
| TW572246U (en) * | 2001-07-26 | 2004-01-11 | Jiun-Fu Liou | Heat dissipating module with a self rapid heat conduction |
| US6889753B2 (en) * | 2001-12-19 | 2005-05-10 | Ts Heatronics Co., Ltd. | Capillary tube heat pipe and temperature controlling apparatus |
| US6845013B2 (en) | 2002-03-04 | 2005-01-18 | Incep Technologies, Inc. | Right-angle power interconnect electronic packaging assembly |
| TW511891U (en) * | 2002-03-13 | 2002-11-21 | Hon Hai Prec Ind Co Ltd | A heat dissipating device |
| US6591898B1 (en) * | 2002-06-20 | 2003-07-15 | International Business Machines Corporation | Integrated heat sink system for a closed electronics container |
| KR100517979B1 (en) * | 2002-12-10 | 2005-10-04 | 엘지전자 주식회사 | Video overlay apparatus for mobile communication device |
| US7650932B2 (en) * | 2006-01-30 | 2010-01-26 | Jaffe Limited | Loop heat pipe |
| CN100473937C (en) * | 2006-10-24 | 2009-04-01 | 张伟君 | High-tech aluminium composite pipe special for environment-friendly energy-saving heating system |
| US8122729B2 (en) * | 2007-03-13 | 2012-02-28 | Dri-Eaz Products, Inc. | Dehumidification systems and methods for extracting moisture from water damaged structures |
| US20080264613A1 (en) * | 2007-04-25 | 2008-10-30 | Chu Huang-Cheng | Structure of memory heat sink |
| US8262263B2 (en) * | 2007-11-16 | 2012-09-11 | Khanh Dinh | High reliability cooling system for LED lamps using dual mode heat transfer loops |
| US8290742B2 (en) * | 2008-11-17 | 2012-10-16 | Dri-Eaz Products, Inc. | Methods and systems for determining dehumidifier performance |
| GB2482100B (en) | 2009-04-27 | 2014-01-22 | Dri Eaz Products Inc | Systems and methods for operating and monitoring dehumidifiers |
| USD634414S1 (en) | 2010-04-27 | 2011-03-15 | Dri-Eaz Products, Inc. | Dehumidifier housing |
| DE112012004290T5 (en) | 2011-10-14 | 2014-07-31 | Dri-Eaz Products, Inc. | Dehumidifiers with improved heat exchanger blocks and associated methods of use and manufacture |
| US20130206369A1 (en) * | 2012-02-13 | 2013-08-15 | Wei-I Lin | Heat dissipating device |
| USD731632S1 (en) | 2012-12-04 | 2015-06-09 | Dri-Eaz Products, Inc. | Compact dehumidifier |
| DE102013014988A1 (en) | 2013-09-07 | 2015-03-26 | Messer Austria Gmbh | burner |
| CN104964591A (en) * | 2015-07-14 | 2015-10-07 | 哈尔滨精方电力设备科技有限公司 | Integrated nickel cupronickel finned tube and matched tube plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3143592A (en) * | 1961-11-14 | 1964-08-04 | Inland Electronics Products Co | Heat dissipating mounting structure for semiconductor devices |
| US3532159A (en) * | 1968-07-24 | 1970-10-06 | Trw Inc | High performance heat pipe |
| US3807493A (en) * | 1971-09-28 | 1974-04-30 | Kooltronic Fan Co | Heat exchanger using u-tube heat pipes |
| GB1359378A (en) * | 1972-04-07 | 1974-07-10 | Secretary Trade Ind Brit | Systems for warming ground surface structures |
| GB1455001A (en) * | 1973-01-08 | 1976-11-10 | Redpoint Ltd | Heat sink assembly |
| JPS5723194B2 (en) * | 1973-08-17 | 1982-05-17 | ||
| CH581420A5 (en) * | 1975-01-22 | 1976-10-29 | Sprecher & Schuh Ag | |
| DE2519803C2 (en) * | 1975-05-03 | 1983-09-08 | GEA Luftkühlergesellschaft Happel GmbH & Co KG, 4630 Bochum | Device for heat exchange |
| US4083093A (en) * | 1975-08-08 | 1978-04-11 | Chertok Burton Z | Multiple material solar panel and method and apparatus for manufacturing the same |
| JPS568238Y2 (en) * | 1976-02-14 | 1981-02-23 | ||
| US4125937A (en) * | 1977-06-28 | 1978-11-21 | Westinghouse Electric Corp. | Apparatus for hydraulically expanding a tube |
| US4222436A (en) * | 1978-12-21 | 1980-09-16 | Dynatherm Corporation | Heat exchange apparatus |
-
1980
- 1980-05-16 CA CA352,099A patent/CA1129406A/en not_active Expired
- 1980-05-19 EP EP80102762A patent/EP0040255B1/en not_active Expired
- 1980-05-19 DE DE8080102762T patent/DE3064897D1/en not_active Expired
- 1980-05-20 US US06/151,571 patent/US4724901A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US4724901A (en) | 1988-02-16 |
| EP0040255A1 (en) | 1981-11-25 |
| EP0040255B1 (en) | 1983-09-21 |
| DE3064897D1 (en) | 1983-10-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |