CN111578756A - Gradient wettability loop heat pipe - Google Patents

Gradient wettability loop heat pipe Download PDF

Info

Publication number
CN111578756A
CN111578756A CN202010256616.0A CN202010256616A CN111578756A CN 111578756 A CN111578756 A CN 111578756A CN 202010256616 A CN202010256616 A CN 202010256616A CN 111578756 A CN111578756 A CN 111578756A
Authority
CN
China
Prior art keywords
heat pipe
heat dissipation
working fluid
dissipation channel
heat
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.)
Pending
Application number
CN202010256616.0A
Other languages
Chinese (zh)
Inventor
祝渊
董佳佳
陈安琪
吴雁艳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest University of Science and Technology
Southern University of Science and Technology
Original Assignee
Southwest University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Southwest University of Science and Technology filed Critical Southwest University of Science and Technology
Priority to CN202010256616.0A priority Critical patent/CN111578756A/en
Publication of CN111578756A publication Critical patent/CN111578756A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00Heat-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
    • F28D15/02Heat-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
    • F28D15/0266Heat-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00Heat-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
    • F28D15/02Heat-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
    • F28D15/04Heat-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
    • F28D15/043Heat-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 forming loops, e.g. capillary pumped loops
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2245/00Coatings; Surface treatments
    • F28F2245/02Coatings; Surface treatments hydrophilic
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2245/00Coatings; Surface treatments
    • F28F2245/04Coatings; Surface treatments hydrophobic

Abstract

The invention discloses a gradient wettability loop heat pipe, which comprises a liquid absorption core and a heat pipe body, wherein an evaporation chamber and an annular heat dissipation channel are arranged in the heat pipe body, the evaporation chamber is communicated with the heat dissipation channel, the liquid absorption core is contained in the evaporation chamber, working fluid is contained in the evaporation chamber and the heat dissipation channel, the heat dissipation channel is provided with a heat insulation section and a condensation section, and a contact angle between the inner surface of the heat dissipation channel and the working fluid is gradually reduced along the flowing direction of the working fluid. The heat dissipation channel and the evaporation chamber form an annular loop for the working fluid to flow circularly, the working fluid is gasified when passing through the heat insulation section, and is condensed and released at the condensation section, so that the temperature of the working fluid is reduced, the working fluid circularly flows in the annular loop under the action of capillary force of the liquid absorption core and gradient force generated by the inner surface of the heat dissipation channel, the circulation efficiency is high, heat of a heat source absorbed in the evaporation chamber can be taken away, and the heat dissipation efficiency of the loop heat pipe is improved.

Description

Gradient wettability loop heat pipe
Technical Field
The invention relates to the technical field of heat dissipation and cooling, in particular to a gradient wettability loop heat pipe.
Background
The heat dissipation problem during the operation of the components relates to the operation reliability and the service life of the components, and the normal operation of the components is influenced by the serious heat dissipation. Compared with forced air or liquid cooling by radiation and natural convection heat dissipation, the phase-change heat dissipation has higher heat dissipation capacity, the liquid evaporative cooling has high-efficiency heat dissipation capacity, and the heat pipe has the advantages of strong heat dissipation capacity, compact structure, flexible arrangement and the like as a heat dissipation element adopting the phase-change heat exchange technology. With the further increase of the heat flux density of the components of the related equipment, higher requirements are provided for the heat dissipation efficiency of the heat dissipation element, and the traditional heat pipe is limited by conditions of various factors and can not meet the development requirements of related industries.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a gradient wettability loop heat pipe which can improve the heat dissipation efficiency of the heat pipe.
One embodiment of the present invention provides a gradient wettability loop heat pipe, including:
a wick;
the heat pipe comprises a heat pipe body, wherein an evaporation chamber and an annular heat dissipation channel are arranged in the heat pipe body, the evaporation chamber is communicated with the heat dissipation channel, the liquid absorption core is contained in the evaporation chamber, the heat dissipation channel and the evaporation chamber contain working fluid, the heat dissipation channel is provided with a heat insulation section and a condensation section, and the contact angle between the inner surface of the heat dissipation channel and the working fluid is gradually reduced along the flowing direction of the working fluid.
The gradient wettability loop heat pipe in the embodiment of the invention has at least the following beneficial effects:
the heat dissipation channel and the evaporation chamber form an annular loop for the working fluid to flow circularly, the working fluid is gasified when passing through the heat insulation section, and is condensed and released at the condensation section, so that the temperature of the working fluid is reduced, the working fluid circularly flows in the annular loop under the action of capillary force of the liquid absorption core and gradient force generated by the inner surface of the heat dissipation channel, the circulation efficiency is high, heat of a heat source absorbed in the evaporation chamber can be taken away, and the heat dissipation efficiency of the loop heat pipe is improved.
According to other embodiments of the present invention, the heat-insulating section includes a first heat-insulating region and a second heat-insulating region, and the first heat-insulating region and the second heat-insulating region are communicated with two ends of the condensation section.
According to other embodiments of the gradient wettability loop heat pipe, along the arrangement direction of the first heat insulation region, the condensation section and the second heat insulation region, the inner surface of the heat dissipation channel is transited from super-hydrophobic to super-hydrophilic.
According to other embodiments of the present invention, the inner surface of the heat dissipation channel transitions from superhydrophobic to hydrophobic at the first adiabatic region, transitions from hydrophobic to hydrophilic at the condensation section, and transitions from hydrophilic to superhydrophilic at the second adiabatic region.
According to other embodiments of the gradient wettability loop heat pipe of the present invention, a width of the heat dissipation channel is gradually reduced in a flow direction of the working fluid.
According to other embodiments of the present invention, a gradient wettability loop heat pipe, a width of the first adiabatic region is greater than a width of the second adiabatic region.
According to other embodiments of the gradient wettability loop heat pipe of the present invention, a width of the condensation section is gradually reduced in a flow direction of the working fluid.
According to the gradient wettability loop heat pipe of other embodiments of the present invention, the heat pipe body is provided with an air pumping port for air pumping.
According to other embodiments of the gradient wettability loop heat pipe, the heat pipe body is provided with a liquid inlet for introducing a working fluid, and the liquid inlet is located on one side of the heat pipe body close to the heat insulation section.
According to another embodiment of the gradient wettability loop heat pipe of the present invention, the heat pipe body includes a first casing and a second casing, the first casing is provided with a first annular groove, the second casing is provided with a second annular groove, and the first casing and the second casing are fastened together to enable the first annular groove and the second annular groove to be in butt joint to form the heat dissipation channel.
According to other embodiments of the gradient wettability loop heat pipe of the present invention, the working fluid is one of water, a fluoride coolant, an alcohol solution, and a ketone solution.
According to other embodiments of the gradient wettability loop heat pipe of the present invention, the wick is one of a sintered wick, a composite wick, a foam metal wick, a wire-mesh wick, and a ceramic wick.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a gradient wettability loop heat pipe;
FIG. 2 is a cross-sectional schematic view of one embodiment of a heat pipe body;
fig. 3 is a schematic structural view of the first casing (second casing);
FIG. 4 is a schematic diagram of a second embodiment of a gradient wettability loop heat pipe;
FIG. 5 is a schematic diagram of a third embodiment of a gradient wettability loop heat pipe.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
In the description of the embodiments of the present invention, if an orientation description is referred to, for example, the orientations or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the embodiments of the present invention, if a feature is referred to as being "disposed", "fixed", "connected", or "mounted" to another feature, it may be directly disposed, fixed, or connected to the other feature or may be indirectly disposed, fixed, connected, or mounted to the other feature. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
First embodiment
Fig. 1 shows a schematic diagram of a first embodiment of a gradient wettability loop heat pipe, fig. 2 shows a cross-sectional view of a heat pipe body 100, and referring to fig. 1 and fig. 2, the gradient wettability loop heat pipe in this embodiment includes a wick 200 and the heat pipe body 100, an evaporation chamber 120 and a heat dissipation channel 110 are arranged in the heat pipe body 100, the evaporation chamber 120 is communicated with the heat dissipation channel 110, the wick 200 is accommodated in the evaporation chamber 120, a working fluid is contained in the heat dissipation channel 110 and the evaporation chamber 120, the heat dissipation channel 110 is annular, and the working fluid can circulate along the heat dissipation channel 110 under a capillary force generated by the wick 200. The heat dissipation channel 110 has a heat insulation section 111 and a condensation section 112, and along the flowing direction of the working fluid (the direction indicated by the arrow in fig. 1), the contact angle between the inner surface of the heat dissipation channel 110 and the working fluid is gradually reduced, so that the wettability of the inner surface of the heat dissipation channel 110 to the working fluid is gradually increased; the evaporation chamber 120 is in contact with an external heat source, because the interior of the heat dissipation channel 110 is in a low-pressure state, the working fluid in the evaporation chamber 120 absorbs heat and then is gasified, the gas enters the condensation section 112 through the heat insulation section 111 under the action of pressure difference, the gas in the condensation section 112 meets the condensation junction to release heat to form liquid, the temperature of the working fluid is reduced at the moment, the working fluid reenters the evaporation chamber 120 under the action of capillary force of the liquid absorption core 200, takes away the heat of the heat source absorbed in the evaporation chamber 120, and enters the heat insulation section 111 again to be gasified, and the circulation is carried out, so that the heat of the heat source absorbed by the evaporation chamber 120 is continuously taken away through the circulating flow of the working fluid in the annular heat dissipation channel 110, and the; moreover, since the contact angle between the working fluid and the inner surface of the heat dissipation channel 110 is gradually decreased, and the affinity between the inner surface of the heat dissipation channel 110 and the working fluid is gradually increased, a gradient wetting effect is formed between the inner surface of the heat dissipation channel 110 and the working fluid, and the working fluid can flow faster under the combined action of the gradient force formed on the inner surface of the heat dissipation channel 110 and the capillary force of the wick 200, so that the circulation flow efficiency of the working fluid is improved, and the heat dissipation strength of the loop heat pipe to a heat source is enhanced.
In this embodiment, the heat dissipation channel 110 and the evaporation chamber 120 form an annular loop for the working fluid to flow circularly, the working fluid is gasified when passing through the heat insulation section 111, and is condensed and released at the condensation section 112 to lower the temperature of the working fluid, the working fluid circulates in the annular loop under the capillary force of the wick 200 and the gradient force generated by the inner surface of the heat dissipation channel 110, the circulation efficiency is high, and the heat of the heat source absorbed in the evaporation chamber 120 can be absorbed, so as to improve the heat dissipation efficiency of the loop heat pipe.
Before the loop heat pipe works, the working fluid is injected into the heat dissipation channel 110, the evacuation operation is performed, and then the heat dissipation channel 110 is closed, so that the interior of the heat dissipation pipeline is in a negative pressure or vacuum state, and the gasification of the working fluid and the subsequent condensation heat release are facilitated.
In this embodiment, the wick 200 is only disposed in the evaporation chamber 120, and the heat dissipation channel 110 does not have the wick 200, so that the heat transfer resistance in the heat dissipation channel 110 is not increased due to the fact that the wick 200 is dispersed on the surface of the heat dissipation channel 110, which may affect the heat transfer efficiency of the loop heat pipe. The working fluid can be selected from simple substance solutions such as water, fluoride cooling liquid, alcohol solution, ketone solution and the like so as to ensure the heat transfer performance of the working fluid, and the input amount of the working fluid in the heat dissipation channel 110 can be selected according to actual requirements; the wick 200 may be a sintered, composite, foam metal, wire mesh, ceramic, or other wick.
In this embodiment, the heat insulation section 111 is divided into two parts, the heat insulation section 111 includes a first heat insulation region 1111 and a second heat insulation region 1112, the first heat insulation region 1111 and the second heat insulation region 1112 are respectively disposed at two sides of the condensation section 112, the working fluid flowing out of the evaporation chamber 120 firstly enters the first heat insulation region 1111 and is gasified in the first heat insulation region 1111, and then enters the condensation section 112 to be condensed to release heat, the heat of the condensation section 112 can be taken away by other external heat dissipation methods, and the condensed working fluid flows back to the evaporation chamber 120 under the action of capillary force and gradient force. By providing the first insulation region 1111 and the second insulation region 1112, the heat absorption efficiency of the loop heat pipe is optimized, and the working fluid passing through the second insulation region 1112 can quickly flow back into the evaporation chamber 120 to absorb heat, so that the heat transfer efficiency of the loop heat pipe is high.
Along the arrangement direction of the first thermal insulation zone 1111, the condensation section 112 and the second thermal insulation zone 1112, the inner surface of the heat dissipation channel 110 is transited from super-hydrophobic to super-hydrophilic, so as to achieve the effect of surface treatment of gradient wettability to the inner surface of the heat dissipation channel 110, and therefore when the working fluid sequentially passes through the first thermal insulation zone 1111, the condensation section 112 and the second thermal insulation zone 1112, the working fluid can rapidly flow under the action of gradient force applied to the inner surface of the heat dissipation channel 110. In this embodiment, the inner surface of the heat dissipation channel 110 transitions from super-hydrophobic to hydrophobic at the first insulating region 1111, the inner surface of the heat dissipation channel 110 transitions from hydrophobic to hydrophilic at the condensation section 112, the inner surface of the heat dissipation channel 110 transitions from hydrophilic to super-hydrophilic at the second insulating region 1112, the hydrophilic forces of the first insulating region 1111, the condensation region, and the second insulating region 1112 are gradually increased, a gradient wetting effect is formed between the working fluid and the inner surface of the heat dissipation channel 110, and the inner surface of the heat dissipation channel 110 has a gradient force of gradient wetting; in addition, through the arrangement of the gradient hydrophilic strength on the inner surface of the heat dissipation channel 110, the residence time of the working fluid in the first heat insulation zone 1111 and the condensation section 112 is relatively long, the working fluid can be fully gasified in the first heat insulation zone 1111, fully condensed in the condensation section 112 to release heat, and quickly enter the evaporation chamber 120 through the second heat insulation zone 1112, so that the heat transfer efficiency of the loop heat pipe is improved on the basis of ensuring the full gasification, condensation and heat release of the working fluid.
The wick 200 may also be surface-treated with super-hydrophilic wettability so that the wick 200 is bonded to the inner surface of the heat dissipation channel 110, thereby increasing the capillary force and gradient driving force of the wick 200 to the working fluid.
In this embodiment, the width or the diameter of the heat dissipation channel 110 at the condensation section 112 gradually decreases along the flow direction of the working fluid, and as the heat dissipation channel 110 gradually narrows in the condensation section 112, the surface tension of the inner surface of the heat dissipation channel 110 changes, the inner surface of the heat dissipation channel 110 applies a driving force to the reflowing working fluid, and the driving force, the surface gradient force and the capillary force act together to further enhance the acting force applied during the working fluid flow process, thereby improving the heat transfer efficiency of the loop heat pipe. The above-mentioned width means an inner diameter or a sectional area when the section of the heat dissipation channel 110 is circular, a sectional area of the heat dissipation channel 110 when the section of the heat dissipation channel 110 is rectangular or other shapes, or a length of the heat dissipation channel 110 in a direction perpendicular to the flow direction of the working fluid.
The width of the second thermal insulation region 1112 is smaller than that of the first thermal insulation region 1111, the lower end of the first thermal insulation region 1111 is in smooth transition with the right end of the condensation section 112, and the lower end of the second thermal insulation region 1112 is in smooth transition with the left end of the condensation section 112, so that the working fluid is gasified in the first thermal insulation region 1111, the gas occupies a large space, the first thermal insulation region 1111 with a wide channel is arranged to provide a sufficient reaction space for the gasification of the working fluid, the resistance of the gas in the first thermal insulation region 1111 during movement is reduced, and the gas can rapidly enter the condensation section 112 through the first thermal insulation region 1111. The condensed working fluid is in liquid form, the volume is reduced, and a larger space is not needed, and the width of the second adiabatic region 1112 can be extended along the width of the left side of the condenser section 112 to optimize the volume of the loop heat pipe.
The heat pipe body 100 is further provided with a liquid inlet 130, working fluid can be introduced from the liquid inlet 130, and the liquid inlet 130 is sealed after the working fluid is introduced, so that external air is prevented from entering and affecting the heat transfer effect of the loop heat pipe. The liquid inlet 130 is located on one side of the heat pipe body 100 close to the first thermal insulation region 1111, or the liquid inlet 130 is located at the evaporation chamber 120 and is communicated with the evaporation chamber 120, so that the working fluid can directly enter the first thermal insulation region 1111 to be gasified or enter the first thermal insulation region 1111 from the evaporation chamber 120 to be gasified.
The heat pipe body 100 may further include an air pumping hole, through which air in the heat dissipation channel 110 is pumped, so that a negative pressure or a vacuum state is formed in the heat dissipation channel 110. The pumping port and the loading port 130 may coincide.
Referring to fig. 3, the heat pipe body 100 may include a first casing 140 and a second casing 150, the first casing 140 is provided with a first annular groove 141, the second casing 150 is provided with a second annular groove (hidden and not shown), the first casing 140 and the second casing 150 may be fastened to each other, and after the fastening, the first annular groove 141 and the second annular groove are butted to each other, and the first annular groove 141 and the second annular groove combine to form the heat dissipation channel 110 and the evaporation chamber 120; by providing the first housing 140 and the second housing 150, the manufacturing process of the loop heat pipe and the surface treatment difficulty of the heat dissipation channel 110 are simplified.
Second embodiment
Referring to fig. 4, the present embodiment is different from the first embodiment in that the width of the heat dissipation channel 110 in the first embodiment is equal to the width of the first insulation region 1111 and the second insulation region 1112, and the width of the heat dissipation channel 110 in the present embodiment gradually decreases along the flow direction of the working fluid, that is, the channels in the first insulation region 1111, the condensation section 112, and the second insulation region 1112 gradually narrow, so that the surface tension of the heat dissipation channel 110 changes due to the structural change in the first insulation region 1111 and the second insulation region 1112, and the surface of the heat dissipation channel 110 generates a driving force for the working fluid; therefore, the working fluid can rapidly pass through the first thermal insulation region 1111 and the second thermal insulation region 1112 on the premise of ensuring that the working fluid has enough vaporization space and can flow under the gradient force given by the inner surface of the heat dissipation channel 110 and the capillary force of the wick 200, thereby improving the heat transfer efficiency of the loop heat pipe.
Third embodiment
Referring to fig. 5, the shape of the loop heat pipe is not limited to a rectangle, a circle, a polygon, etc., and the loop heat pipes in the first and second embodiments are both rectangular, in this embodiment, the heat pipe body 100 is set to be oval, the evaporation chamber 120 is set to be circular, the width of the heat dissipation channel 110 gradually decreases along the flow direction of the working fluid, the inner surface of the heat dissipation channel 110 is transited from superhydrophobic to superhydrophilic along the flow direction of the working fluid, the working fluid is subjected to a gradient force applied to the inner surface of the heat dissipation channel 110 and a capillary force of the wick 200, and due to the gradual narrowing of the heat dissipation channel 110, a driving force generated by the surface tension change of the heat dissipation channel 110 is combined with the gradient force and the capillary force, so as to drive the working fluid to flow at the same time.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims (12)

1. A gradient wettability loop heat pipe, comprising:
a wick;
the heat pipe comprises a heat pipe body, wherein an evaporation chamber and an annular heat dissipation channel are arranged in the heat pipe body, the evaporation chamber is communicated with the heat dissipation channel, the liquid absorption core is contained in the evaporation chamber, the heat dissipation channel and the evaporation chamber contain working fluid, the heat dissipation channel is provided with a heat insulation section and a condensation section, and the contact angle between the inner surface of the heat dissipation channel and the working fluid is gradually reduced along the flowing direction of the working fluid.
2. A gradient wettability loop heat pipe according to claim 1, wherein the adiabatic section includes a first adiabatic region and a second adiabatic region, the first adiabatic region and the second adiabatic region being in communication with both ends of the condensation section.
3. A gradient wettability loop heat pipe according to claim 2, wherein an inner surface of the heat dissipation channel transitions from superhydrophobic to superhydrophilic along an arrangement direction of the first adiabatic region, the condensation section, and the second adiabatic region.
4. A gradient wettability loop heat pipe as set forth in claim 2, wherein an inner surface of the heat dissipation channel transitions from superhydrophobic to hydrophobic at the first adiabatic region, transitions from hydrophobic to hydrophilic at the condensation section, and transitions from hydrophilic to superhydrophilic at the second adiabatic region.
5. A gradient wettability loop heat pipe according to any one of claims 1 to 4, wherein the width of the heat dissipation channel is gradually reduced in the flow direction of the working fluid.
6. A gradient wettability loop heat pipe according to any one of claims 2 to 4, wherein the width of the first adiabatic region is larger than the width of the second adiabatic region.
7. A gradient wettability loop heat pipe according to any one of claims 1 to 4, wherein a width of the condensation section is gradually reduced in a flow direction of the working fluid.
8. A gradient wettability loop heat pipe according to any one of claims 1 to 4, wherein an exhaust port for performing air exhaust is provided on the heat pipe body.
9. A gradient wettability loop heat pipe according to any one of claims 1 to 4, wherein a liquid inlet for introducing a working fluid is provided on the heat pipe body, and the liquid inlet is located on a side of the heat pipe body close to the heat-insulating section.
10. A gradient wettability loop heat pipe according to any one of claims 1 to 4, wherein the heat pipe body includes a first casing and a second casing, a first annular groove is provided on the first casing, a second annular groove is provided on the second casing, and the first casing and the second casing are fastened together so that the first annular groove and the second annular groove are butted to form the heat dissipation channel.
11. A gradient wetting loop heat pipe according to any one of claims 1 to 4, wherein the working fluid is one of water, a fluoride coolant, an alcohol solution, and a ketone solution.
12. A gradient wettability loop heat pipe according to any one of claims 1 to 4, wherein the wick is one of a sintered wick, a composite wick, a foamed metal wick, a wire-mesh wick, and a ceramic wick.
CN202010256616.0A 2020-04-02 2020-04-02 Gradient wettability loop heat pipe Pending CN111578756A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010256616.0A CN111578756A (en) 2020-04-02 2020-04-02 Gradient wettability loop heat pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010256616.0A CN111578756A (en) 2020-04-02 2020-04-02 Gradient wettability loop heat pipe

Publications (1)

Publication Number Publication Date
CN111578756A true CN111578756A (en) 2020-08-25

Family

ID=72119298

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010256616.0A Pending CN111578756A (en) 2020-04-02 2020-04-02 Gradient wettability loop heat pipe

Country Status (1)

Country Link
CN (1) CN111578756A (en)

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090034504A (en) * 2007-10-04 2009-04-08 순 동 강 Heat exchanger using passire air cooling type heat pipe
WO2009051001A1 (en) * 2007-10-19 2009-04-23 Three Eye Co., Ltd. One-way fluid moving device
CN101655328A (en) * 2008-08-19 2010-02-24 何昆耀 Flat plate type loop heat conducting device and manufacturing method thereof
CN201463680U (en) * 2009-09-04 2010-05-12 苏州聚力电机有限公司 Pipe body looped heat pipe
CN104121794A (en) * 2014-07-25 2014-10-29 中国科学院工程热物理研究所 One-way loop gravity assisted heat pipe and manufacturing method thereof
CN104406440A (en) * 2014-11-06 2015-03-11 江苏大学 Silicon-based miniature loop heat pipe cooler
CN107835617A (en) * 2017-11-01 2018-03-23 深圳兴奇宏科技有限公司 Loop heat pipe structure
CN109539846A (en) * 2018-11-23 2019-03-29 西安交通大学 A kind of flat-plate heat pipe with gradient wetting structure
CN208779995U (en) * 2018-06-22 2019-04-23 广东工业大学 A kind of soaking plate
CN208887429U (en) * 2018-04-27 2019-05-21 南昌大学 A kind of unidirectional circuit type pulsating heat pipe and energy saver
CN110081749A (en) * 2018-12-26 2019-08-02 湖北工业大学 Aluminium base ultrathin heat pipe and preparation method with super-hydrophobic-super hydrophilic structure
CN110081745A (en) * 2018-06-12 2019-08-02 山东大学 A kind of evaporation part caliber is greater than the loop circuit heat pipe of condensation part
CN210070686U (en) * 2019-04-02 2020-02-14 大连理工大学 High-liquid-filling-rate loop thermosiphon based on multi-scale collaborative hydrophobic surface
CN110822959A (en) * 2019-10-24 2020-02-21 西安交通大学 Super-hydrophobic-hydrophilic surface vacuum cavity radiator
CN110926247A (en) * 2019-12-13 2020-03-27 大连理工大学 Pulsating heat pipe with gradient wetting surface and preparation method thereof

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090034504A (en) * 2007-10-04 2009-04-08 순 동 강 Heat exchanger using passire air cooling type heat pipe
WO2009051001A1 (en) * 2007-10-19 2009-04-23 Three Eye Co., Ltd. One-way fluid moving device
CN101655328A (en) * 2008-08-19 2010-02-24 何昆耀 Flat plate type loop heat conducting device and manufacturing method thereof
CN201463680U (en) * 2009-09-04 2010-05-12 苏州聚力电机有限公司 Pipe body looped heat pipe
CN104121794A (en) * 2014-07-25 2014-10-29 中国科学院工程热物理研究所 One-way loop gravity assisted heat pipe and manufacturing method thereof
CN104406440A (en) * 2014-11-06 2015-03-11 江苏大学 Silicon-based miniature loop heat pipe cooler
CN107835617A (en) * 2017-11-01 2018-03-23 深圳兴奇宏科技有限公司 Loop heat pipe structure
CN208887429U (en) * 2018-04-27 2019-05-21 南昌大学 A kind of unidirectional circuit type pulsating heat pipe and energy saver
CN110081745A (en) * 2018-06-12 2019-08-02 山东大学 A kind of evaporation part caliber is greater than the loop circuit heat pipe of condensation part
CN208779995U (en) * 2018-06-22 2019-04-23 广东工业大学 A kind of soaking plate
CN109539846A (en) * 2018-11-23 2019-03-29 西安交通大学 A kind of flat-plate heat pipe with gradient wetting structure
CN110081749A (en) * 2018-12-26 2019-08-02 湖北工业大学 Aluminium base ultrathin heat pipe and preparation method with super-hydrophobic-super hydrophilic structure
CN210070686U (en) * 2019-04-02 2020-02-14 大连理工大学 High-liquid-filling-rate loop thermosiphon based on multi-scale collaborative hydrophobic surface
CN110822959A (en) * 2019-10-24 2020-02-21 西安交通大学 Super-hydrophobic-hydrophilic surface vacuum cavity radiator
CN110926247A (en) * 2019-12-13 2020-03-27 大连理工大学 Pulsating heat pipe with gradient wetting surface and preparation method thereof

Similar Documents

Publication Publication Date Title
US6360814B1 (en) Cooling device boiling and condensing refrigerant
US20110067843A1 (en) Heat exchange device made of polymeric material
CN102954723B (en) Loop heat pipe, and electronic apparatus including loop heat pipe
KR20040084683A (en) Gas storage tank and its manufacturing method
JP4324187B2 (en) Heat storage device
CN103200803B (en) A kind of heat radiation device for loop heat pipe having pool boiling
KR101929910B1 (en) Cold reserving heat exchanger
CN103687455A (en) Vapor chamber
US6397934B2 (en) Cooling device boiling and condensing refrigerant
CN111642103A (en) High heat flow density porous heat sink flow cooling device
CN111578756A (en) Gradient wettability loop heat pipe
FR2803907A1 (en) Heat exchanger for exhaust gas
CN2788115Y (en) Deep cryogenic loop heat pipe for cryogenic integrated system
TWM592640U (en) Steady flow pressure-charging device of evaporator
TWM592641U (en) Steady flow pressure-charging device of condenser
JPH0961074A (en) Closed temperature control system
JP5676205B2 (en) Loop heat pipe and manufacturing method thereof
CN213335719U (en) Compression-resistant composite heat pipe
JP2005283022A (en) Evaporator, thermosiphon, and stirling cooler
KR101408949B1 (en) Radiator with built-in oil cooler
JP4910567B2 (en) Ejector refrigeration cycle
CN212158264U (en) Loop heat pipe evaporator with composite heat sink and loop heat pipe system
TW202125737A (en) Steady flow pressurization device of condenser comprising a heat exchange module and a casing to allow liquid water to be stably and quickly discharged to the water outlet
JP2006275423A (en) Heat exchange system
CN108253673B (en) Passive cooling capillary drain pipe and method for two-phase fluid loop reservoir

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination