TW200940938A - Evaporator and loop heat pipe using the same - Google Patents

Abstract

An evaporator for a loop heat pipe with at least a connecting pipe and a working fluid including a case, a wick and a spacer is provided. The case connects the connecting pipe. The wick is disposed in the case and has a plurality of capillary structures. The spacer is assembled between the case and the wick and has at least one ditch. The working fluid is suitable for passing through the capillary structures and the ditch and flowing into the connecting pipe. The invention is able to be produced with a lower cost and a higher yield rate.

Description

〇Π 26754twf.doc/p 200940938 IX. Description of the invention: [Technical field of the invention] The present invention relates to an evaporator (evap(10)t〇r), and in particular to a type of heat pipe (-heat pipe) · [Prior Art] ❹ $ has made the electronic production ° °1 enough to maintain its normal operating temperature range. 'Traditional skills usually deploy thermal fins (fm) on the heating elements of electronic products, and At the same time, the cooling airflow provided by the fan is used to quickly remove the heat generated by the component during operation. However, in recent years, a loop type heat pipe derived from the conversion of the liquid state and the gaseous state to convert the heat generated by the heat reading during operation has a high heat transfer amount (30~) 6_W) is gradually gaining attention with the advantages of long-distance heat transfer (〇3m~1〇m). 1 is a schematic view of a conventional loop heat pipe, and FIG. 2 is an exploded perspective view of the evaporator of FIG. Referring to FIG. 2 and FIG. 2, the loop heat officer 100 is generally formed by an evaporator 110, which is formed together with the evaporator 110, a closed loop connecting tube (12) and a suitable for evaporation. The device Π0 and the connecting tube 20 are composed of a cooling fluid flowing. The evaporator u〇 includes an outer tube 112, an inner tube 114 disposed in the outer tube 112, a liquid passage 116 formed in the inner tube 114, and a plurality of vapors formed between the outer tube and the inner tube 114. Channel 118. 200940938

Oil 26754twf, doc/p The liquid working fluid located in the liquid passage 116 will penetrate into the vapor passages 118 through a plurality of capillary structures of the inner tube i14, and will be generated by absorbing the heat generating elements during operation. The heat is converted into a gaseous state. The gaseous working fluid then flows through the vapor passages 118 into the connecting tube 120. Then, the gaseous working fluid flowing in the connecting pipe ι2 is cooled to be converted into a liquid state, and is again returned to the liquid passage 116. In this way, the working fluid can continuously dissipate heat from the heating element.值得注意 It is noted that in the prior art, these vapor passages 118 are typically comprised of dips formed on the inner surface of the outer tube 112 or the outer surface of the inner tube 114. However, the inner surface of the outer tube 112 is not easily processed, so that not only the processing cost is high, but also heat leakage between the outer tube 112 and the inner tube 114 due to machining errors. Further, the inner tube 114 is usually formed by a sintered body made of metal powder or a leaching body made of high polymer salt. Therefore, the formation of the groove on the outer surface of the inner tube U4 not only increases the manufacturing cost of the mold, but also causes the problem that the powder distributed in the inner tube 114 is not uniform and is not easily released. = [Summary of the Invention] The present invention provides an evaporator which is low in production cost. The invention provides a loop type heat pipe with high product yield. The invention provides an evaporator, which is suitable for having at least one connecting pipe 6 200940938 rvi w / i , οπ 26754 twf. doc / p M han a core material (wick) and a spacing two and including - shell (progress), connection, The core material is disposed in the casing; ^ (two::. The casing and the connecting pipe are assembled between the bump and the rider, =; there is a fine capillary. The interval is suitable for passing through the age of the knot. "In one embodiment of the invention, the shape of the LB r ❹ 皆 is tubular, and the spacer ring 2 = the spacer in the embodiment of the invention - the outer surface of the outer surface. - the second end, and The core material further has a housing having a - end to a dosend end. "^ (= η end) and - : end ' ― 2: In an embodiment of the invention, the core material More (stopper), and the spacers and the right one have three ends of the stop portion adjacent to the open end, and against the n-di brother and the fourth end. The first end!, seal, 'and resist the second The groove extends 4 = between the four ends, and extends beyond the closed end. The brother and the first in the present invention, the above-mentioned _ (flat plate), and the phase of the flat plate A gap is formed for the two t-plates. y is a spacer. In the embodiment of the present invention, the above-mentioned ones are plate-shaped, and the spacers are disposed on the side of the core material. The shape of the % material 7 200940938

Ai L»nj /11011 26754twf.doc/p In an embodiment of the present invention, the above (4) and the cover body (hidden 0. The cover body covers the storage wire storage tank to sigh and protect the groove, and the core material is matched In the liquid storage tank, and _ she between the traitor and the ride. (4) placed in an embodiment of the invention, the upper body of the thief ±) L thief above the body also includes at least one column ( SUp_ngP〇st). The support column passes between the bottom of the core and the spacer. History money% night price

The writhing body is exemplified by the fact that the above-mentioned end of the connecting tube is connected to the adult body and is located on the side of the core material adjacent to the spacer, and the connecting end is connected to the housing and is located on the side of the core material away from the spacer. In an embodiment of the invention, the above-described inter-parallel grooves. In the present invention, the above-mentioned trench includes a linear groove (aaight), a diagonal groove (5) _ (four) a spiral groove (spimlditch), a radial groove (radidditc n (branched ditch) 四 (four) repeatedly In the embodiment of the present invention, the groove penetrates an inner surface and an outer surface of the spacer. In the embodiment of the invention, the core material is made of metal powder or polymer salt. In the embodiment of the present invention, the spacer is made of a material, graphite or ceramic (cemmic). The present invention further proposes a loop type, including at least a connecting tube and a therapeutic hair. And the working fluid. The evaporator comprises ___ casing, - and - spacer. The casing is connected to the connecting pipe, but is arranged in the casing, 200940938cm 26754twf.doc/p and has a capillary structure. The object is assembled in the casing and the core material, and in an embodiment in which the fluid is adapted to pass through the capillary structure and the groove, the casing, the core material and the inter-substrate are read, and the spacer surrounds the outer core of the core material. Surface and 4 ί: 明中'The above housing has a - end - The first to the heart material has an open end and a closed end 1 respectively; at the second end, and the connecting tube _ in the embodiment of the present invention, the + part, and the spacer has a first, the above Heartwood has a - stop

O is at the open end and against the stop 2: and a fourth end. The third end is adjacent to the second end. The groove extends at the four ends to seal the _ and is outside the end. Between the two ends of the younger brother and the fourth end, and extending to the present invention, the cautious bending is formed, and the above-mentioned spacers are formed by a flat plate on the opposite sides of a treatment of the present invention. A gap in the spacer. Both are in the form of a plate, and the outer shape of the spacer and the spacer described above are placed on the side of the core material of the present invention. And a cover. The cover body cover "=, the above-mentioned housing includes - the liquid storage tank is assembled with a spacer in the 芸-groove, and the core material is disposed in the liquid storage tank, and is between the present and the _ real =. In her case, The above-mentioned housing further includes at least - 200940938 ......w ... 〇Π 26754 twf.doc / p ^ column. The branch column is connected to the bottom of the hard groove and the spacer through the core material * In the embodiment of the present invention The connection end of the connecting pipe is connected to the installation body at the side of the m-shaped side, and is located at the side of the core material away from the spacer. In a parallel embodiment, the spacers described above have a plurality of mutually invented inventions, and the trenches include linear trenches, core trenches, spiral spacers, radial vias or succeeding trenches. In the embodiment (4) - the embodiment, the groove extends through the inner surface of the space and an outer surface. The above-mentioned core material is made of metal powder. The material of the above-mentioned spacer includes gold. In one embodiment of the present invention, the knot or the polymer salt is leached and filtered. In one embodiment of the invention, it is genus, graphite or ceramic. Since the invention separates the casing, the core material and the structure having the groove (four) partition from the casing and the core material, the overall production cost of the evaporator and the circuit type heat of the evaporator is lower, and The rate of sputum will also be higher. The above features and advantages of the present invention will become more apparent and obvious. The following detailed description of the embodiments of the present invention will be described in detail below. Embodiments FIG. 3 is a schematic structural diagram of a loop type heat pipe according to a consistent embodiment of the present invention. 10 200940938

Oil 26754twf.doc/p, and Figure 4 is an exploded perspective view of the evaporator of Figure 3. Figure 5a is

The upper view of the flat plate in front of the spacer in Fig. 4 is shown, and the top view of the flat plate in accordance with another embodiment of the present invention is shown. Referring first to FIG. 3 and FIG. 4, the loop heat pipe 200 includes a connection 210, an evaporator 300, and a working fluid (not shown), wherein the evaporator 300 is a casing 31 and a core material. 32〇 and a spacer 33〇, composed. Further, the casing 310 is connected to the connecting pipe 210, and the core material 32 is disposed in the casing 310 and has a plurality of capillary structures. Further, the spacer 330 is assembled between the casing 31 and the core material 320 and has at least two grooves 332 (a plurality of which are schematically illustrated in the drawings of this embodiment). At this point, the grooves 332 form a vapor passage between the housing 310 and the core material 320 to allow working fluid to flow through the capillary structures 332 into the connecting tube 210, thereby forming a circulation system. It is noted that since the grooves 332 are formed on the spacers 33', an inner surface 312 of the housing 310 and an outer surface 322 of the core material 320 may each be a smooth surface. In this way, not only the housing 310 and the core material 320 can be produced at a lower production cost, but the core material 320 also has a higher product yield. In addition, it is easier to fabricate the grooves 332 on the spacers 330 than in the prior art, so that the overall manufacturing cost of the evaporator 300 is also low. Hereinafter, a plurality of embodiments will be described to explain the structure, material, and assembly method of the evaporator 300. In an embodiment of the invention, the outer shape of the housing 310, the core material 320 and the spacer 33 are tubular, and the housing 310 can have a first end 310a and a second opposite the first end 310a. The end 310b and a reservoir 314 for storing liquid working fluid can be used with 20094093810]1 26754twf.doc/p. The liquid storage tank 314 is adjacent to the first end 310a' and the opposite ends of the connecting tube 210 are respectively connected to the first end 31〇a and the second end 310b, so that the connecting tube 21〇 and the housing 31〇 can be In a closed loop. Furthermore, the core material 320 can be made by metal powder sintering or polymer salt leaching, and it can have an open end 320a, a closed end 320b with respect to the opening = %〇a, and a adjacent open end. The hollow portion of the 32-plus stop portion 324 ° of the forcing material 320 extends from the open end 320a toward the closed end 32% to form a liquid passage. Further, the material of the spacer 330 is, for example, a metal, and is bent, for example, by a flat plate 330' shown in Fig. 5A. As shown by the circle 5A, the flat plate 330' may have a plurality of linear grooves 332 which are parallel to each other. These grooves 332 extend through opposite sides of the plate 330' and extend between the opposite side edges 330a, 330b of the plate 330. When the flat plate 330' is bent to form the spacers 330, the grooves 332' will form the grooves 332 of the spacers 33'', and the opposite side edges 330a, 330b of the flat plates 33, respectively, will be respectively A second end 330a and a fourth end 330b of the spacer 330 are formed. That is, the trenches 332 will extend through an inner surface 334 and an outer surface 336 of the spacer 330 and will extend between the third end 330a and the fourth end 330b. After the housing 310, the core material 320 and the spacer 330 are completed, the spacer 330 may be firstly sleeved on the outer surface 322 of the core material 320, and then inserted into the housing 310 together with the core material 320 to The assembly of the evaporator 300 is completed. At this time, the open end 320a and the third end 330a will face the first end 12 200940938 AI DFU711011 26754twf.doc/p 310a, and the third end 330a will abut the stop 324 ' and the closed end 32 〇 b and the four ends 330b will be adjacent to the second end 310b' and the fourth end 33〇b will abut the second end 310b. At the same time, the reservoir 314 is connected to the liquid passage. Then, the evaporator 300 can be further connected to the connecting pipe 210 to form the circuit type heat pipe 200. It is noted that 'the grooves 332 can extend beyond the closed end 32%' to allow working fluid to flow through the grooves 332 from the second end 31% 至 into the connecting tube 210. In addition, when the flat plate 330 is bent into the spacer 330, the opposite side edges 330c' and 330d of the flat plate 330' may not contact each other to form a notch 338 of the spacer 330. At this time, the spacer 33 〇 will have elasticity 'so that the outer surface 336 can be attached tightly to the inner surface 312 of the housing 31 , thereby enabling higher heat conduction between the housing 310 and the spacer 330 . effectiveness. However, in other embodiments not shown, the spacer 330 can also be fabricated directly into a tubular shape. At this time, the spacer 33 may have no gap 338. When the loop heat pipe 200 is assembled, the casing 31 can be used to contact a heat source (not shown) to allow the working fluid to dissipate heat from the heat source. At this time, the liquid working fluid stored in the liquid storage tank 314 and the liquid passage can be infiltrated into the grooves 332 (vapor passage) via the capillary structure, and can be converted into a gaseous state by absorbing heat energy supplied from the heat source. The gaseous working fluid can then flow from the second end 310b to the connecting tube 21 through the grooves 332 (vapor passages). Then, the gaseous working fluid flowing in the connecting pipe 21〇 is cooled and converted into a liquid state, and is again returned to the liquid storage tank 314 and the liquid passage, so that the working fluid can continuously enter the heat source 13 ❹ ❹ 200940938 /νι ^υ, ί, Οΐι 26754twf.doc/p 亍 亍 : ::: 中 中 == 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在 在Cooling rate. The broadcast m, AA T 疋 is formed by bending the flat plate 33 with the slanting ridges 332 as shown in the figure. In other words, it can be a diagonal groove, a slant groove, a snail groove θ_33, 2 radiation = groove, a dendritic groove, or other grooves (4) grooves that pass through the ^3^2 3 Slot 332 does not have r:=2:, rb. However, in other embodiments not shown, the spacer dog material can also be made of stone, can be cast, machined, shot out of Chengdu, and, Xu Guangtao is made and operated. Fig. 6 is another embodiment of the invention - the implementation of the touch-type back-intention. Please refer to FIG. 6. Similarly, this real path === also includes the structure of the connecting tube, the evaporator 鄕, and the working if::?: the housing 510, the core (four), and the evaporation of the intermediate embodiment :I: Different from the front-form, === core material: 20 and the shape of the spacer 530 are recorded in the schematic diagram of the main bracket 512, the cover 514, and the pattern of the further embodiment. Multiple). After the liquid storage tank 512, and the core material illusion is disposed in the liquid storage 14 26754twf.doc/p 200940938, XX / / A < \ / i 1 slot 512 ' and the spacer 530 is assembled to the cover 514 and Between the core material 52〇. In addition, the support columns 516 pass through the core material 520 and are connected to the bottom of the liquid storage tank 5 by means of melting junction, welding, or diffusion bonding. Between the spacers 530. o

In addition, opposite ends of the connecting pipe 410 are connected to the casing 51. One end of the connection member 410 is located on the side of the core member 52 〇 adjacent to the spacer 53 ,, and the other end of the connection member 410 is located on the side of the core member 52 〇 away from the spacer. In addition, the spacer 530 may also have a plurality of trenches 532, and the trenches 532 may be a straight groove, a diagonal groove, a spiral groove, a radial groove, a tree groove or a groove of other shapes. . In this embodiment, it is not necessary to make a groove on the surface 522 of the cover body 520 and the cover 520. Therefore, not only the case 51° but also the core material and the ridge material can be separately formed, and the material and the material are The rate T with the groove = this material will also have a higher production cost than the loop type heat pipe. - and its product yield will be more moderate. Thus -;::::::: The inner surface of the shelf will have a spring, so that the housing and the spacer = tightly attached to the housing can have a higher heat conduction 15 200940938 iiOW 26754twf.doc /p efficiency. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. © [Simple Description of the Drawings] Fig. 1 is a schematic view of a conventional loop heat pipe. Figure 2 is an exploded perspective view of the evaporator of Figure 1. Fig. 3 is a schematic view showing the structure of a loop type heat pipe according to an embodiment of the present invention. Figure 4 is an exploded perspective view of the evaporator of Figure 3. Figure 5A is a top view of the plate before being bent into the spacer of Figure 4. Figure 5B is a top plan view of a tablet in accordance with another embodiment of the present invention. Fig. 6 is a schematic view showing the structure of a loop type heat pipe according to another embodiment of the present invention. [Main component symbol description] 100: Loop heat pipe 112: Outer pipe 114: Inner pipe 116: Liquid passage 118: Vapor passage 16 200940938

Aiuru/ilOll 26754twf.doc/p 110: evaporator 120: connecting pipe 200: loop heat pipe 210: connecting pipe 300: evaporator 310: casing 310a: first end 310b: second end ◎ 312, 334: inner Surface 314: reservoir 320: core material 320a: open end 320b: closed end 322, 336: outer surface 324: stop 330: spacer ❹ 330', 330": flat plate 330a: third end 330a, 330b , 330c', 330d,: side edge 330b: fourth end 332, 332', 332": groove 338: notch 400: loop heat pipe 410: connecting pipe 17 200940938 /uuru/1 ιΟΠ

500 510 512 514 516 520 522 530 532 26754twf.doc/p : Evaporator : Housing : Reservoir : Cover : Support column . Rage material : Surface : Spacer : Groove

Claims (1)

26754twf.doc/p 200940938 VIA i-/i \J / A 1 0 1 1 X. Patent application scope: 1. An evaporator suitable for a loop type heat pipe having at least one connecting pipe and a working fluid, wherein the evaporation The device includes: a casing connected to the connecting pipe; a core material disposed in the casing and having a plurality of capillary structures; and a spacer assembled between the casing and the core material and having At least one groove, wherein the working fluid is adapted to flow into the connecting tube through the plurality of capillary structures and the groove. 2. The evaporator of claim 1, wherein the shell, the core material and the spacer are tubular in shape, and the spacer surrounds an outer surface of the core material. 3. The evaporator of claim 2, wherein the housing has a first end and a second end, and the core material further has an open end and a closed end, the open end facing the first One end, the closed end is adjacent to the second end, and opposite ends of the connecting tube are respectively connected to the first end and the second end of the G. 4. The evaporator of claim 3, wherein the housing further has a reservoir, and the reservoir is adjacent to the first end. 5. The evaporator of claim 3, wherein the core material further has a stop portion, and the spacer further has a third end and a fourth end, the third end being adjacent to the opening Ending and abutting the stop portion, the fourth end being adjacent to the closed end and abutting the second end, the groove extending between the third end and the fourth end and extending to the Outside the closed end. The evaporator of claim 2, wherein the 5 objects are bent by a flat plate, and the opposite sides of the flat plate form a 哕g partition. a gap in the object. 7. The evaporator of claim 1, wherein the core and the spacer are in the shape of a plate, and the spacer is disposed on one side of the core material. The evaporator, wherein the casing includes a liquid storage tank and a cover body, the cover body covers the liquid storage tank, the core material is disposed in the liquid storage tank, and the spacer is assembled to the cover body and Between the. The evaporator of the eighth aspect of the invention, wherein the bottom column of the casing tank passes through the core material and is connected to the evaporator of the seventh aspect of the patent tube, wherein Connecting one side, and # is connected to the ί housing, and the end of the core material adjacent to the spacer is connected to the shell®' and located in the evaporator of the core material, wherein the interval includes straight ^ The evaporator of the patent dry cofferdam 1 wherein the grooved groove θ, the oblique groove, the spiral groove, the radial groove or the tree penetrates the first item The evaporator, wherein the groove is the same as the inner surface and an outer surface. An oil evaporator according to the invention of claim 2, wherein 兮# is produced by sintering metal powder or leaching of a polymer salt. The village of the invention is the evaporator of the first aspect of the invention, wherein the material of the material comprises metal, graphite or ceramic. / Interval 16. A loop type heat pipe comprising: at least one connecting pipe; an evaporator comprising: ❹ Ο a casing connected to the connecting pipe; a core material disposed in the casing and having a plurality of hairs a spacer, a spacer, assembled in the housing and the core material at least one groove; and a, the crucible has a flow suitable for flowing through the capillary structure and the thin groove; The back mentioned in the item. Both the core material and the shape of the spacer are ‘,, taste, and the outer surface surrounding the core material. And the circuit described in the 17th item of the patent application scope has the double-body of the circuit--the first end is a type of hot battalion end and a closed end, and the addition of $^^hai sentence is more summer, middle and ° The opposite two-degree closed end-end of the connecting tube and the second end. ^ respectively connected to a workflow to the S Hai connection tube 17 the shell ... 19.. Shen Shen patent scope 帛 18 items t and body has a - reservoir tank 'and the reservoir tank adjacent =: = camp , where, the first end. 21 200940938 mu...W01I 26754twf.doc/p = only more /, there is a stop, and the spacer has more - the fourth end of the mountain 'the third end is adjacent to the open end, and j and: the fourth The end is adjacent to the closed end and abuts the second portion, between the extension It and the fourth end, and extends to extend the spacer M into the viewing tube, wherein a gap of the spacer is formed. And the angle of the two sides of the slab is as follows, and the shape of the circuit type 埶 total spacer described in the patent application range of $16 is plate-shaped, and the interval is two = the shell circumference and the said tank A road heat pipe in which the core material is placed between. In the wrong tank, and the spacer is clustered in the shell circuit of the shell, wherein the bottom of the tank is filled with the material: the column passes through the primary material. 25. As claimed in the patent range μ, the connecting tube The end-to-end connection, the scoop loop type heat pipe 'the side of its partition, and the body, and located in the core material adjacent to the fold:? The core material is connected to the housing away from the =π: end, and: 22 200940938 Oil 26754 twf.doc/p 27. The loop heat pipe of claim 16, wherein the groove comprises a linear groove , diagonal grooves, spiral grooves, radial grooves or dendritic grooves. 28. The loop heat pipe of claim 16, wherein the groove extends through an inner surface of the spacer and an outer surface. 29. The loop type heat pipe according to claim 16, wherein the core material is made by sintering a metal powder or filtering a polymer salt. 30. The loop heat pipe of claim 16, wherein the spacer material comprises metal, graphite or ceramic. twenty three