CN112254558B - Three-dimensional laminated heat pipe and preparation method thereof - Google Patents
Three-dimensional laminated heat pipe and preparation method thereof Download PDFInfo
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- CN112254558B CN112254558B CN202010951528.2A CN202010951528A CN112254558B CN 112254558 B CN112254558 B CN 112254558B CN 202010951528 A CN202010951528 A CN 202010951528A CN 112254558 B CN112254558 B CN 112254558B
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- 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
- F28D15/04—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 tubes having a capillary structure
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Abstract
The embodiment of the invention discloses a three-dimensional laminated heat pipe and a preparation method thereof, wherein the preparation method comprises the following steps: the two cover plates and the main frame body form a circulation cavity, one end of the circulation cavity is set as an evaporation end, and the other end of the circulation cavity is set as a condensation end; the first frame strips of the protruding formation of face of apron, the first frame strip interval on two apron sets up and forms the air gap, and the circulation chamber is separated into by air gap intercommunication's steam chamber and backward flow chamber through first frame strip, and the internal face in backward flow chamber is provided with capillary wick, and is filled with working medium in the backward flow chamber. In the technical scheme, on one hand, the heights of the reflux cavity and the steam cavity are not influenced mutually, so that the heat transfer effect of the heat pipe is improved; meanwhile, the reflux cavity and the steam cavity are communicated through the air gap, so that gas-liquid separation is realized, the problem that the refluxed liquid is torn and taken away due to the fact that the moving directions of the gas and the liquid are opposite and the moving speed of the gas is increased is solved, and the heat dissipation effect is greatly improved.
Description
Technical Field
The invention relates to the technical field of three-dimensional laminated heat pipes, in particular to a three-dimensional laminated heat pipe and a preparation method thereof.
Background
With the rapid development of microelectronic technology, high performance, miniaturization and integration of electronic devices have become mainstream trends, but the heat flow density of chips is greatly increased due to high integration level, high power consumption and small size, and the heat transfer and heat dissipation problems are more serious. Statistically, more than 55% of electronic equipment fails due to over-high temperature caused by untimely heat dissipation; meanwhile, with the thinness of small mobile electronic devices such as smart phones, ultrathin heat pipes are the current research hotspot.
The heat pipe is used as an efficient heat transfer element, the stable operation of the heat pipe depends on the capillary pressure provided by the liquid absorption core and the permeation and backflow speed of liquid in the liquid absorption core, and therefore, the liquid absorption core is used as a core component of the heat pipe and is a key factor for determining the heat transfer performance of the heat pipe. Current wicks can be divided into three major categories: sintered wick structures obtained using materials such as powders/fibers/mesh, grooved wick structures obtained using various processing means, and composite wick structures having both sintered and grooved features.
The inner space of the ultrathin heat pipe is sharply reduced along with the reduction of the thickness of the heat pipe, and although the micro-groove liquid absorbing core can be processed, the technology is more complex, and the depth of the groove is shallower, so that the capillary pressure is lower, and the heat transfer performance of the heat pipe is seriously influenced; on the other hand, because the moving directions of the vapor and the liquid in the heat pipe are opposite, the moving speed of the vapor is increased along with the increase of the power of the heat pipe, the liquid flowing back can be torn by the vapor and taken away, and the heat transfer performance of the heat pipe is seriously affected.
Disclosure of Invention
Therefore, it is necessary to provide a three-dimensional laminated heat pipe and a method for manufacturing the same to solve the technical problem of poor heat transfer performance of the heat pipe due to the limitation of the thickness of the heat pipe and the opposite movement directions of the vapor and the liquid in the heat pipe in the prior art.
To this end, according to a first aspect, an embodiment provides a three-dimensional stacked heat pipe comprising:
the device comprises two cover plates and a main frame body, wherein the two cover plates are arranged oppositely and at intervals, the main frame body is clamped between the two cover plates, the two cover plates and the main frame body form a circulation cavity, one end of the circulation cavity is arranged to be an evaporation end, and the other end of the circulation cavity is arranged to be a condensation end; the first frame strip that the face of apron is protruding to be formed, two first frame strip interval on the apron sets up and forms the air gap, the circulation chamber warp first frame strip separate into by steam chamber and the backward flow chamber of air gap intercommunication, the internal face in backward flow chamber is provided with capillary wick, just it has working medium to fill in the backward flow chamber.
In some embodiments of the three-dimensional laminated heat pipe, the two first frame bars and the two cover plates form the steam cavity, and the two first frame bars, the two cover plates and the main frame form the reflux cavity.
In some embodiments of the three-dimensional stacked heat pipe, the number of the main frame bodies is at least two, the three-dimensional stacked heat pipe further includes an interlayer frame body sandwiched between two adjacent main frame bodies, the interlayer frame body protrudes and extends towards the first frame strip to form a second frame strip, the air gap is divided into a plurality of sub air gaps through the second frame strip, the backflow cavity is divided into a plurality of sub backflow cavities through the interlayer frame body, and the sub backflow cavities are communicated with the steam cavity through the sub air gaps.
In some embodiments of the three-dimensional laminated heat pipe, the main frame body is provided with a clamping groove, the surface of the cover plate faces the clamping groove to form a first clamping rib in a protruding mode, the interlayer frame body faces the clamping groove to form a second clamping rib in a protruding mode, and the first clamping rib and the second clamping rib are correspondingly contained in the clamping groove.
In some embodiments of the three-dimensional laminated heat pipe, the main frame body at least includes two first frame plates arranged opposite to each other at intervals and a second frame plate connected between the two first frame plates, and the first frame plates are located between two adjacent first frame plates; the interlayer frame body at least comprises two third frame plates which are oppositely arranged at intervals and correspondingly abutted against the first frame plates and a fourth frame plate which is connected between the third frame plates and correspondingly abutted against the second frame plates.
In some embodiments of the three-dimensional stacked heat pipe, one end of the first frame strip is provided with a first notch communicated with the steam cavity, one end of the first clamping rib is provided with a second notch communicated with the reflux cavity, one end of the main frame body is provided with a third notch communicated with the circulation cavity, one end of the interlayer frame body is provided with a fourth notch communicated with the circulation cavity, and the first notch, the second notch, the third notch and the fourth notch form a filling port.
According to a second aspect, an embodiment provides a method for manufacturing a three-dimensional laminated heat pipe according to the first aspect, including:
processing and manufacturing a cover plate, a main frame body and an interlayer frame body;
stacking and assembling the cover plate, the main frame body and the interlayer frame body into a three-dimensional laminated heat pipe;
and vacuumizing the reflux cavity and the steam cavity, and filling a working medium into the reflux cavity.
In some embodiments of the method for manufacturing a three-dimensional stacked heat pipe, the processing to manufacture the cover plate, the main frame body, and the interlayer frame body includes:
obtaining a cover plate, a main frame body and an interlayer frame body through blanking processing of a blanking die;
the cover plate is punched locally through the local forming die to form a first clamping rib, the main frame body is punched locally to form a clamping groove, and the interlayer frame body is punched locally to form a second clamping rib.
In some embodiments of the method for manufacturing a three-dimensional stacked heat pipe, the method for manufacturing a three-dimensional stacked heat pipe further includes: and after the cover plate, the main frame body and the interlayer frame body are stacked and assembled into the three-dimensional laminated heat pipe, performing pressure thermal diffusion welding treatment on the stacked and assembled three-dimensional laminated heat pipe.
In some embodiments of the method for manufacturing a three-dimensional stacked heat pipe, the method for manufacturing a three-dimensional stacked heat pipe further includes: before the cover plate, the main frame body and the interlayer frame body are manufactured by the processing, corresponding blanking dies and local forming dies are designed and manufactured according to the outline shapes of the cover plate, the main frame body and the interlayer frame body.
The embodiment of the invention has the following beneficial effects:
a circulation cavity is formed by the two cover plates and the main frame body clamped between the two cover plates, one end of the circulation cavity is set as an evaporation end, and the other end of the circulation cavity is set as a condensation cavity; and the first frame strip of the cover plate divides the circulation cavity into a coplanar steam cavity and a reflux cavity, the evaporation end is heated, the working medium in the reflux cavity is heated and evaporated into gas and moves to the steam cavity through an air gap, and the original heat conduction gas moves from the evaporation end of the steam cavity to the condensation end and is condensed into liquid and flows back to the evaporation end through the capillary pressure of the capillary wick in the reflux cavity, so that the heat is dissipated circularly. In the technical scheme, on one hand, the circulation cavity is divided into the coplanar steam cavity and the reflux cavity by the first frame strip of the cover plate, namely, the reflux cavity is positioned at one side of the steam cavity, and the heights of the reflux cavity and the steam cavity are not influenced with each other, so that the heat transfer effect of the heat pipe is improved; on the other hand, through air gap intercommunication backward flow chamber and steam chamber, realize gas-liquid separation, gas is most to be moved in the steam chamber, and liquid then flows in the backward flow chamber, has solved because of in the heat pipe gas and liquid movement opposite direction, gaseous velocity of movement along with the rising of heat pipe power grow, and then can tear the problem of taking away with the liquid of backward flow to radiating effect has been improved by a wide margin.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a schematic structural diagram of a three-dimensional stacked heat pipe according to an embodiment of the present invention;
FIG. 2 is a schematic partial cross-sectional view of a three-dimensional stacked heat pipe according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram illustrating a cover plate of a three-dimensional stacked heat pipe according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram illustrating a main frame body of a three-dimensional stacked heat pipe according to an embodiment of the present invention;
fig. 5 is a partially enlarged schematic view of a main frame body of a three-dimensional stacked heat pipe according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram illustrating a spacer frame body of a three-dimensional stacked heat pipe according to an embodiment of the present invention;
FIG. 7 is a schematic partial cross-sectional view illustrating a spacer frame of a three-dimensional stacked heat pipe according to an embodiment of the invention;
fig. 8 is a schematic process flow diagram illustrating a method for manufacturing a three-dimensional stacked heat pipe according to an embodiment of the present invention.
Description of the main element symbols:
10. a cover plate; 11. a first frame strip; 11a, a second notch; 12. a first clamping rib; 12a, a first notch; 20. a main frame body; 20a, a clamping groove; 20b, a third gap; 21. a first frame plate; 22. a second frame plate; 30. an interlayer frame body; 30a, a fourth gap; 30b, second clamping ribs; 30c, a second frame strip; 31. a third frame plate; 32. a fourth frame plate; 40. a circulation chamber; 41. a reflux cavity; 411. a sub-return cavity; 42. a steam chamber; 100. a three-dimensional laminated heat pipe; 100a, an air gap; 100b, a filling port.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 7, in an embodiment of the present invention, a three-dimensional stacked heat pipe 100 is provided, where the three-dimensional stacked heat pipe 100 includes: the two cover plates 10 and the main frame body 20 are arranged oppositely and at intervals, the two cover plates 10 and the main frame body 20 form a circulation cavity 40, one end of the circulation cavity 40 is arranged as an evaporation end, and the other end of the circulation cavity 40 is arranged as a condensation end; the first frame strips 11 formed by the protruding plate surfaces of the cover plates 10 are arranged at intervals to form air gaps 100a, the circulation cavity 40 is divided into a steam cavity 42 and a reflux cavity 41 which are communicated by the air gaps 100a through the first frame strips 11, capillary wicks are arranged on the inner wall surface of the reflux cavity 41, and working media are filled in the reflux cavity 41.
In the invention, a circulation cavity 40 is formed by two cover plates 10 and a main frame body 20 clamped between the two cover plates 10, one end of the circulation cavity 40 is set as an evaporation end, and the other end of the circulation cavity 40 is set as a condensation cavity; and the first frame strip 11 of the cover plate 10 divides the circulation chamber 40 into a steam chamber 42 and a reflux chamber 41 which are coplanar, the evaporation end is heated, the working medium in the reflux chamber 41 is heated and evaporated into gas and moves to the steam chamber 42 through the air gap 100a, because the original heat conduction gas moves from the evaporation end to the condensation end of the steam chamber 42 and is condensed into liquid, and flows back to the evaporation end through the capillary pressure of the capillary wick in the reflux chamber 41, so that the heat is dissipated circularly. In the technical scheme, on one hand, the circulation cavity 40 is divided into the coplanar steam cavity 42 and the coplanar reflux cavity 41 by the first frame strip 11 of the cover plate 10, namely, the reflux cavity 41 is positioned at one side of the steam cavity 42, and the heights of the reflux cavity 41 and the steam cavity 42 are not affected with each other, so that the heat transfer effect of the heat pipe is improved; on the other hand, the air gap 100a is communicated with the reflux cavity 41 and the steam cavity 42 to realize gas-liquid separation, most of gas moves in the steam cavity 42, and liquid flows in the reflux cavity 41, so that the problem that the reflux liquid is torn and taken away because the moving directions of the gas and the liquid in the heat pipe are opposite and the moving speed of the gas is increased along with the increase of the power of the heat pipe is solved, and the heat dissipation effect is greatly improved.
Referring to fig. 3, the direction of movement of the gas is shown by white arrows and the direction of flow of the liquid is shown by black arrows.
It should be noted that, in the present embodiment, the thickness of the three-dimensional laminated heat pipe 100 is equal to the superimposed thickness of the cover plate 10 and the main frame 20, and the thinner the cover plate 10 and the main frame 20 are, the smaller the thickness of the three-dimensional laminated heat pipe 100 is; in addition, the controllable capillary pressure variation trend can be realized by adjusting the sectional dimension of the capillary wick in the reflux cavity 41 in the length direction of the vertical cover plate 10.
In some embodiments, the two first frame strips 11 and the two cover plates 10 form the steam chamber 42, and the two first frame strips 11, the two cover plates 10 and the main frame 20 form the reflow chamber 41. Therefore, the return chamber 41 is disposed around the vapor chamber 42 to increase the active area of the capillary wick and improve the heat dissipation effect.
In an embodiment, the number of the main frames 20 is at least two, the three-dimensional stacked heat pipe 100 further includes an interlayer frame 30 sandwiched between two adjacent main frames 20, the interlayer frame 30 protrudes and extends toward the first frame strip 11 to form a second frame strip 30c, the air gap 100a is divided into a plurality of sub air gaps 100a through the second frame strip 30c, the reflow cavity 41 is divided into a plurality of sub reflow cavities 411 through the interlayer frame 30, and the sub reflow cavities 411 are communicated with the steam cavity 42 through the sub air gaps 100 a.
In this embodiment, the number of the main frame 20 and the interlayer frame 30 may be determined according to actual needs, and the backflow cavity 41 is divided into a plurality of sub-backflow cavities 411 communicating with the steam cavity 42 by the main frame 20 and the interlayer frame 30. In the present embodiment, the thickness of the three-dimensional laminated heat pipe 100 is equal to the thickness of the cover plate 10, the main frame body 20, and the interlayer frame body 30, and the thinner the thickness of the cover plate 10, the main frame body 20, and the interlayer frame body 30 is, the smaller the thickness of the three-dimensional laminated heat pipe 100 is.
In one embodiment, the main frame 20 has a clamping groove 20a, the cover plate 10 has a plate surface protruding toward the clamping groove 20a to form a first clamping rib 12, the interlayer frame 30 protrudes toward the clamping groove 20a to form a second clamping rib 30b, and the first clamping rib 12 and the second clamping rib 30b are correspondingly received in the clamping groove 20 a. The first clamping rib 12 on the cover plate 10 is clamped in the clamping groove 20a of the main frame body 20, and the second clamping rib 30b on the interlayer frame body 30 is clamped in the clamping groove 20a of the main frame body 20, so that the cover plate 10 and the main frame body 20, and the main frame body 20 and the interlayer frame body 30 can be prevented from being dislocated, the heat diffusion welding quality of the three-dimensional laminated heat pipe 100 can be effectively improved, the sealing quality of the three-dimensional laminated heat pipe 100 is improved, and gas-liquid components in the using process of the three-dimensional laminated heat pipe 100 are prevented from leaking.
In one embodiment, the main frame 20 includes at least two first frame plates 21 disposed opposite to each other and spaced apart from each other, and a second frame plate 22 connected between the two first frame plates 21, and the first frame strips 11 are located between two adjacent first frame plates 21; the interlayer frame 30 at least comprises two third frame plates 31 which are oppositely arranged at intervals and correspondingly abut against the first frame plate 21, and a fourth frame plate 32 which is connected between the two third frame plates 31 and correspondingly abuts against the second frame plate 22. Any two adjacent first frame plates 21, the second frame plate 22 connected between the two adjacent first frame plates 21 and the frame strips can determine a steam cavity 42 and a reflux cavity 41 arranged around the steam cavity 42, namely, a plurality of reflux cavities 41 and evaporation cavities which are arranged at intervals can be simultaneously formed by arranging the first frame plates 21, the second frame plates 22 and the number of the frame strips, and the process time and the cost are not obviously increased; the interlayer frame 30 is provided with the third frame plate 31 and the fourth frame plate 32 corresponding to the first frame plate 21 and the second frame plate 22 of the main frame 20, and divides the reflow cavity 41 into the sub-reflow cavity 411 and the air gap 100a into the sub-air gap 100 a.
In some specific embodiments, one end of the first frame strip 11 is provided with a first notch 12a communicating with the steam cavity 42, one end of the first clamping rib 12 is provided with a second notch 11a communicating with the reflux cavity 41, one end of the main frame 20 is provided with a third notch 20b communicating with the circulation cavity 40, one end of the interlayer frame 30 is provided with a fourth notch 30a communicating with the circulation cavity 40, and the first notch 12a, the second notch 11a, the third notch 20b and the fourth notch 30a form the filling port 100 b. The filling port 100b allows the circulation chamber 40 (the return chamber 41 and the steam chamber 42) to be vacuumized and the return chamber 41 to be filled with the working medium.
The embodiment of the present invention further provides a method for manufacturing the three-dimensional stacked heat pipe 100, referring to fig. 8, including:
101. processing and manufacturing the cover plate 10, the main frame body 20 and the interlayer frame body 30;
102. stacking and assembling the cover plate 10, the main frame body 20 and the interlayer frame body 30 into a three-dimensional laminated heat pipe 100;
103. the reflow chamber 41 and the steam chamber 42 are vacuumized, and the working medium is poured into the reflow chamber 41.
The cover plate 10, the main frame body 20 and the interlayer frame body 30 are made of copper foil materials, the heat pipe is divided into the cover plate 10, the main frame body 20 and the interlayer frame body 30, the production cost is reduced, the outline shapes of the cover plate 10, the main frame body 20 and the interlayer frame body 30 are designed and processed according to the number of the steam cavities 42, the backflow cavities 41 and the air gaps 100a and the number of the sub backflow cavities 411 and the sub air gaps 100a, then the three-dimensional laminated heat pipe 100 is obtained by stacking and assembling, then the backflow cavities 41 and the steam cavities 42 are vacuumized, and working media are filled into the backflow cavities 41, so that the three-dimensional laminated heat pipe 100 can dissipate heat.
The vacuum evacuation process is performed on the return chamber 41 and the steam chamber 42, and the filling port 100b needs to be sealed after the working medium is poured into the return chamber 41.
In some embodiments, the processing of the cover plate 10, the main frame 20, and the spacer frame 30 includes:
obtaining a cover plate 10, a main frame body 20 and an interlayer frame body 30 through blanking processing of a blanking die;
the cover plate 10 is locally punched by a local forming die to form a first clamping rib 12, the main frame body 20 is locally punched to form a clamping groove 20a, and the interlayer frame body 30 is locally punched to form a second clamping rib 30 b.
When the processing cover plate 10, the main frame body 20 and the interlayer frame body 30 are manufactured, the processing cover plate mainly comprises two parts: firstly, the cover plate 10, the main frame body 20 and the interlayer frame body 30 are obtained through blanking processing of a blanking die, and then the local forming die is used for respectively punching the cover plate 10, the main frame body 20 and the interlayer frame body 30 to locally form a first clamping rib 12, a clamping groove 20a and a second clamping rib 30b, so that the cover plate 10, the main frame body 20 and the interlayer frame body 30 are kept relatively stable during stacking and assembling.
In one embodiment, the method for manufacturing the three-dimensional stacked heat pipe 100 further includes: after the three-dimensional laminated heat pipe 100 is assembled by stacking the cover plate 10, the main frame body 20, and the interlayer frame body 30, the three-dimensional laminated heat pipe 100 formed by stacking and assembling may be subjected to a pressure thermal diffusion welding process, and the cover plate 10, the main frame body 20, and the interlayer frame body 30 may be welded as a whole, thereby improving the relative stability of each component of the three-dimensional laminated heat pipe 100.
In some specific embodiments, the method for manufacturing the three-dimensional stacked heat pipe 100 further includes: before the cover plate 10, the main frame body 20 and the interlayer frame body 30 are manufactured, the method further comprises the following steps: corresponding blanking dies and partial forming dies are designed and manufactured according to the contour shapes of the cover plate 10, the main frame body 20 and the interlayer frame body 30, and the cover plate 10, the main frame body 20 and the interlayer frame body 30 are processed through the blanking dies and the partial forming dies.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A three-dimensional laminated heat pipe, comprising:
the device comprises two cover plates and a main frame body, wherein the two cover plates are arranged oppositely and at intervals, the main frame body is clamped between the two cover plates, the two cover plates and the main frame body form a circulation cavity, one end of the circulation cavity is arranged to be an evaporation end, and the other end of the circulation cavity is arranged to be a condensation end; the plate surface of the cover plate is protruded to form first frame strips, the first frame strips on the two cover plates are arranged at intervals to form air gaps, the circulation cavity is divided into a steam cavity and a reflux cavity which are communicated by the air gaps through the first frame strips, the inner wall surface of the reflux cavity is provided with a capillary liquid absorption core, and the reflux cavity is filled with a working medium;
the two first frame strips, the two cover plates and the main frame body form the reflux cavity;
the three-dimensional stromatolite heat pipe is including pressing from both sides and establishing two adjacent interlayer framework between the main framework, the interlayer framework orientation first frame strip arch is extended and is formed the second frame strip, the air gap warp a plurality of sub-air gap is separated into to the second frame strip, the backward flow chamber warp a plurality of sub-backward flow chamber is separated into to the interlayer framework, sub-backward flow chamber warp sub-air gap with the steam chamber intercommunication.
2. The three-dimensional laminated heat pipe according to claim 1, wherein the main frame body is provided with a clamping groove, the surface of the cover plate faces the clamping groove to form a first clamping rib, the interlayer frame body faces the clamping groove to form a second clamping rib, and the first clamping rib and the second clamping rib are correspondingly accommodated in the clamping groove.
3. The three-dimensional laminated heat pipe according to claim 2, wherein the main frame body at least comprises two first frame plates arranged oppositely and at intervals and a second frame plate connected between the two first frame plates, and the first frame strips are located between two adjacent first frame plates; the interlayer frame body at least comprises two third frame plates which are oppositely arranged at intervals and correspondingly abutted against the first frame plates and a fourth frame plate which is connected between the third frame plates and correspondingly abutted against the second frame plates.
4. The three-dimensional laminated heat pipe according to claim 3, wherein one end of the first frame strip is provided with a first notch communicated with the steam cavity, one end of the first clamping rib is provided with a second notch communicated with the reflux cavity, one end of the main frame body is provided with a third notch communicated with the circulation cavity, one end of the interlayer frame body is provided with a fourth notch communicated with the circulation cavity, and the first notch, the second notch, the third notch and the fourth notch form a filling port.
5. A method of manufacturing a three-dimensional laminated heat pipe according to any one of claims 1 to 4, comprising:
processing and manufacturing a cover plate, a main frame body and an interlayer frame body;
stacking and assembling the cover plate, the main frame body and the interlayer frame body into a three-dimensional laminated heat pipe;
and vacuumizing the reflux cavity and the steam cavity, and filling a working medium into the reflux cavity.
6. The method for manufacturing a three-dimensional laminated heat pipe according to claim 5, wherein the processing and manufacturing of the cover plate, the main frame body and the interlayer frame body comprises:
obtaining a cover plate, a main frame body and an interlayer frame body through blanking processing of a blanking die;
the cover plate is punched locally through the local forming die to form a first clamping rib, the main frame body is punched locally to form a clamping groove, and the interlayer frame body is punched locally to form a second clamping rib.
7. The method for manufacturing a three-dimensional laminated heat pipe according to claim 6, further comprising: and after the cover plate, the main frame body and the interlayer frame body are stacked and assembled into the three-dimensional laminated heat pipe, performing pressure thermal diffusion welding treatment on the stacked and assembled three-dimensional laminated heat pipe.
8. The method for manufacturing a three-dimensional laminated heat pipe according to claim 7, further comprising: before the cover plate, the main frame body and the interlayer frame body are manufactured by the processing, corresponding blanking dies and local forming dies are designed and manufactured according to the outline shapes of the cover plate, the main frame body and the interlayer frame body.
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| CN112254558A (en) | 2021-01-22 |
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