CN208075641U - Compact loop heat pipe - Google Patents

Abstract

The utility model relates to the technical field of thermal control equipment, and discloses a compact loop heat pipe, which includes an evaporator, a condenser and a transmission pipeline. The evaporator and the condenser are connected through the transmission pipeline, and the transmission pipeline includes an outer pipe and an inner pipe. , the outer tube is sleeved on the outside of the inner tube, and a support structure is provided between the outer tube and the inner tube. The utility model provides a compact loop heat pipe, which adopts a sleeve-type transmission pipeline as a gas pipeline and a liquid pipeline, which can be integrally formed, easy to process, simple in shape, compact in structure, takes up less space in the heat dissipation system, and is more efficient. It is easy to bend, which is convenient for the flexible layout of the system; in the low temperature environment, the tube-in-tube structure is adopted, and the outer tube can form effective thermal insulation protection for the inner tube, greatly reducing the heat leakage from the outside to the inner tube environment, and it is easier to heat the outer tube Wrap radiation-proof materials or insulation materials, etc., to reduce the external heat leakage to the transmission pipeline, reduce the cooling demand for the cold source, and improve the working stability and reliability of the loop heat pipe.

Description

A compact loop heat pipe

technical field

The utility model relates to the technical field of thermal control equipment, in particular to a compact loop heat pipe.

Background technique

A heat pipe is a highly efficient heat transfer device, its heat transfer capacity is one or two orders of magnitude higher than that of metal, and it is called a thermal superconductor. The traditional heat pipe mainly includes a metal shell, capillary structure and working medium. The capillary structure is usually composed of channels or sintered porous structures, and is distributed along the entire length of the heat pipe. Although the structure is simple, the flexibility is poor. With a full capillary structure, the liquid flow resistance is relatively large, and the liquid and gas flow in opposite directions in the same space, and there is a problem of carrying, which affects the further improvement of the heat transfer capacity of the heat pipe.

The loop heat pipe is also a thermal control device that utilizes the gas-liquid phase change of the working medium for efficient heat transfer. It mainly includes an evaporator, a condenser, a gas pipeline, and a liquid pipeline. The evaporator and the The condenser is connected to form a closed circuit. Compared with the traditional heat pipe, the liquid-absorbing core only exists inside the evaporator, and the evaporator and the condenser are connected by a flexible metal thin-walled tube. Obtaining smaller flow resistance and better flexible connection between the cold source and the heat source are more conducive to long-distance heat transfer, isolation of vibration and electromagnetic interference, etc., and the gas and liquid working fluids flow along different paths , to avoid the flow carrying problem, so the heat transfer efficiency is higher, and it has been widely used in aerospace, superconducting, electronic devices and other fields.

There are usually two, three or even more transmission lines between the evaporator and the condenser of the existing loop heat pipe, the structure is cumbersome and complicated, and it needs to occupy more system space when coupled with the heat dissipation device, and in many applications When arranging pipelines, more fixed structures need to be set up, and these factors bring a lot of inconvenience to the practical application of loop heat pipes.

Utility model content

(1) Technical problems to be solved

The purpose of the utility model is to provide a compact loop heat pipe, aiming at solving the problems in the prior art that the loop heat pipe occupies a large system space and the layout of the transmission pipeline is cumbersome and complicated.

(2) Technical solution

In order to solve the above technical problems, the utility model provides a compact loop heat pipe, including an evaporator, a condenser and a transmission pipeline, the evaporator and the condenser communicate through the transmission pipeline, and the transmission pipeline includes An outer tube and an inner tube, the outer tube is sheathed on the outer side of the inner tube, and a supporting structure is arranged between the outer tube and the inner tube.

Wherein, the number of the support structure is at least one.

Wherein, the support structure is a support bar arranged along the length direction of the transmission pipeline, one side in the width direction of the support bar is connected to the inner side of the outer tube, and the other side in the width direction of the support bar is connected to the inner side of the inner tube. Connected outside.

Wherein, the outer tube, the inner tube and the supporting structure are integrally formed; or, the outer tube and the supporting structure are integrally formed, and the inner tube is detachably arranged on the supporting structure; or, the inner tube It is integrally formed with the supporting structure, and the outer tube is detachably arranged on the supporting structure.

Wherein, the condenser communicates with the transmission pipeline through a conversion structure, and the conversion structure is arranged outside or inside the condenser.

Wherein, the evaporator includes a casing and a liquid-absorbing core, and the liquid-absorbing core is arranged inside the casing.

Wherein, capillary structures are arranged in the inner tube and/or the outer tube.

Wherein, the capillary structure is at least one; the capillary structure is a microgroove structure, a powder structure, a fiber structure or a foam metal structure; or, the capillary structure is a mesh or bundle structure made of metal wire or fiber .

Wherein, the evaporator also includes a baffle, and the baffle and the liquid-absorbing core separate the inner chamber of the housing into a gas chamber and a liquid chamber; the outer tube communicates with the gas chamber of the housing , the inner tube extends into the interior of the liquid-absorbent core through the baffle.

Wherein, a gas storage is also included, and the gas storage is communicated with the outer pipe or the inner pipe as a gas pipeline.

(3) Beneficial effects

Compared with the prior art, the utility model provides a compact loop heat pipe, the condenser, the liquid pipeline, the evaporator, and the gas pipeline are sequentially connected to form a loop structure, and the sleeve-type transmission pipeline is used as the gas pipeline and the gas pipeline. The liquid pipeline, the sleeve-type transmission pipeline can be integrally formed, and the processing is convenient; this sleeve-type transmission pipeline makes the loop heat pipe simple in shape and compact in structure, takes up less space in the heat dissipation system, and is easier to bend and convenient The layout of the system is flexible; especially for the loop heat pipe working in a low temperature environment, the transmission pipeline adopts a tube-in-tube structure, and the outer tube can form effective thermal insulation protection for the inner tube, greatly reducing the environmental heat leakage from the outside to the inner tube, Moreover, it is easier to wrap radiation-proof materials or thermal insulation materials on the outer tube to reduce the environmental heat leakage from the outside to the transmission pipeline, reduce the cooling demand for the cold source, and improve the working stability and reliability of the loop heat pipe.

Description of drawings

Fig. 1 is the structural representation of the compact loop heat pipe of the utility model embodiment;

Fig. 2 is a structural schematic diagram of the first cooperation mode between the outer tube and the inner tube in the compact loop heat pipe according to the embodiment of the present invention;

Fig. 3 is a structural schematic diagram of the second matching mode of the outer tube and the inner tube in the compact loop heat pipe according to the embodiment of the present invention;

Fig. 4 is a specific structural schematic diagram of a compact loop heat pipe according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of a conversion structure in a compact loop heat pipe according to an embodiment of the present invention;

Figure 6 is a perspective view of the cooperation of the outer tube and the inner tube in Figure 2 or Figure 3;

In the figure, 1-evaporator; 2-condenser; 3-transmission pipeline; 4-conversion structure;

11-liquid-absorbing core; 12-shell; 13-gas channel; 14-baffle plate;

21-condensation pipeline; 22-plate body;

31-outer pipe; 32-inner pipe; 33-support structure; 34-air storage.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Referring to Fig. 1 to Fig. 6, the utility model provides a compact loop heat pipe, including an evaporator 1, a condenser 2 and a transmission pipeline 3, the evaporator 1 and the condenser 2 communicate through the transmission pipeline 3, and the transmission The pipeline 3 includes an outer tube 31 and an inner tube 32 , the outer tube 31 is sleeved on the outside of the inner tube 32 , and a support structure 33 is provided between the outer tube and the inner tube. The tube-in-tube transmission pipeline 3 adopts a tube-in-tube structure, and its outer tube 31 and inner tube 32 are used as a gas pipeline and a liquid pipeline, and the condenser 2, the liquid pipeline, the evaporator 1, and the gas pipeline are connected in sequence to form a circuit Structure; at the same time, the sleeve-type transmission pipeline 3 can be that the outer tube 31 is a gas pipeline and the inner tube 32 is a liquid pipeline, or the outer tube 31 is a liquid pipeline and the inner tube 32 is a gas pipeline.

The utility model provides a compact loop heat pipe. Compared with the prior art, the condenser, the liquid pipeline, the evaporator, and the gas pipeline are sequentially connected to form a loop structure, and the sleeve-type transmission pipeline is used as the gas pipeline and the gas pipeline. The liquid pipeline, the sleeve-type transmission pipeline can be integrally formed, and the processing is convenient; this sleeve-type transmission pipeline makes the loop heat pipe simple in shape and compact in structure, takes up less space in the heat dissipation system, and is easier to bend and convenient The layout of the system is flexible; especially for the loop heat pipe working in a low temperature environment, the transmission pipeline adopts a tube-in-tube structure, and the outer tube can form effective thermal insulation protection for the inner tube, greatly reducing the environmental heat leakage from the outside to the inner tube, Moreover, it is easier to wrap radiation-proof materials or thermal insulation materials on the outer tube to reduce the environmental heat leakage from the outside to the transmission pipeline, reduce the cooling demand for the cold source, and improve the working stability and reliability of the loop heat pipe.

Referring to Figures 2 and 3, the number of support structures 33 is at least one; when there are multiple support structures 33, the support structures 33 can be evenly distributed in a ring shape in the space formed between the outer tube 31 and the inner tube 32 , or can also be unevenly distributed; the support structure 33 is a support bar arranged along the length direction of the transmission pipeline 3, one side in the width direction of the support bar is connected to the inner side of the outer tube 31, and the other side in the width direction of the support bar The side is connected to the outside of the inner tube 32; the outer tube 31, the inner tube 32 and the supporting structure 33 are integrally formed; the outer tube 31 and the supporting structure 33 are integrally formed, and the inner tube 32 is detachably arranged on the supporting structure 33; or, The inner tube 32 and the supporting structure 33 are integrally formed, and the outer tube 31 is detachably arranged on the supporting structure 33 . The sleeve-type transmission pipeline 3 includes an outer tube 31, an inner tube 32 and at least one support structure 33. A certain gap is maintained between the outer tube 31 and the inner tube 32 through the support structure 33, and the relative position does not change. On the one hand, the The sleeve-type transmission pipeline 3 is more convenient to bend, and meets the needs of the spatial layout of the heat dissipation system. On the other hand, it can reduce the heat exchange between the inner tube 32 and the external environment, and reduce the heat leakage of the transmission pipeline. The outer tube 31, the inner tube 32 and the support structure 33 of the sleeve-type transmission pipeline 3 can be integrally formed, or the outer tube 31 and the support structure 33 are integrally formed, and then the inner tube 32 is inserted into the inside of the outer tube 31 for assembly, or The inner tube 32 and the support structure 33 are integrally formed, and then the outer tube 31 is put on the outside of the inner tube 32 for assembly, and the processing technology is simple. The outer tube 31 , inner tube 32 or support structure 33 of the sleeve-type transmission pipeline 3 can be made of metal or non-metal. When the outer tube 31, the inner tube 32, and the supporting structure 33 are detachable, they can be made of the same material or different materials. The pipeline section of the outer tube 31 or the inner tube 32 may include a circle, an ellipse, a semicircle, an arc, a sector, a rectangle, a quadrangle or other polygons, or a shape formed by combining at least two or more structures. The outer tube 31 It can be the same as or different from the pipeline section form of the inner tube 32 . In addition, local contact between the outer tube 31 and the inner tube 32 can occur in the direction of transmission, including point contact, line contact or surface contact, for example, the circular outer tube 31 and the circular inner tube 32 are in line contact in an inscribed manner, The square outer tube 31 and the square inner tube 32 are arranged eccentrically and contact surface along the conveying direction.

Referring to FIG. 5 , the condenser 2 communicates with the transfer pipeline 3 through a conversion structure 4 , and the conversion structure 4 is arranged outside or inside the condenser 2 . The conversion structure 4 is provided to connect the outer pipe 31 , the inner pipe 32 and the two ports of the condensing pipeline 21 respectively, and the conversion structure 4 is arranged inside the condenser 2 , and can also be arranged outside the condenser 2 . Referring to Fig. 4 for the conversion structure 4, the two ports of the condensation pipeline 21 are connected to the gas pipeline and the liquid pipeline through the conversion structure 4, and the gas working medium and the liquid working medium are isolated from each other in the conversion structure 4 to ensure that the gas-liquid The working fluids flow along their respective flow directions without affecting each other. The end of the sleeve-type transmission pipeline 3 near the side of the condenser 2 is connected to the conversion structure 4, and the other side of the sleeve-type transmission pipeline 3 is connected to the evaporator 1. The connection and fixing methods are welding, gluing, clipping, At least one of tight fit, expansion tube or threaded connection, the sealing method between the end of the sleeve-type transmission pipeline 3 and the conversion structure 4 or evaporator 1 is welding, gluing, tight fit, metal seal or O-ring seal at least one of the

Referring to Fig. 4, in this embodiment, the evaporator 1 includes a liquid-absorbing core 11, a housing 12 and a baffle 14, the liquid-absorbing core 11 is arranged inside the housing 12, and the evaporator 1 can be cylindrical or It can be in the shape of a disc, flat plate, saddle, etc., or in the form of a pipeline. The inside of the evaporator 1 can be a cavity, or a micro-groove structure can be provided, and a liquid-absorbing core 11 or other capillary structures can also be provided. 1 Also includes other structural forms capable of vaporizing liquid working fluid into gas. The outer surface of the liquid-absorbing core 11 and/or the inner surface of the housing 12 is provided with a gas channel 13; the evaporator also includes a baffle 14, and the baffle 14 and the liquid-absorbing core 11 divide the inner cavity of the housing 12 into a gas chamber And the liquid chamber, the inside of the liquid chamber is all liquid working fluid or gas-liquid two-phase working fluid, the baffle plate 14 can be a solid material or a porous structure material, and when the baffle plate 14 is a porous material, it can also be combined with the liquid-absorbing core 11 Integral molding; the outer tube 31 communicates with the gas cavity of the housing 12 , and the inner tube 32 extends into the liquid-absorbing core 11 through the baffle plate 14 .

Further, the inner tube 32 and/or the outer tube 31 are provided with a capillary structure; the capillary structure is a microgroove structure, a powder structure, a fiber structure or a metal foam structure; Fascicle structure; at least one capillary structure.

Specifically, in this embodiment, the evaporator 1 is cylindrical, and a liquid-absorbing core 11 is arranged inside the evaporator 1. The liquid-absorbing core 11 is open on one side close to the sleeve-type transmission pipeline 3 and closed on the other side. Cup-shaped, a baffle 14 is provided at the end of the opening side of the liquid-absorbing core 11 to isolate the inner space of the liquid-absorbing core 11 from the outside, the outer tube 31 of the sleeve-type transmission pipeline 3 is used as a gas pipeline, and the inner tube 32 As a liquid pipeline, the inner tube 32 passes through the baffle 14 and extends into the liquid-absorbing core 11 , so that the liquid working medium in the liquid pipeline can directly flow into the liquid-absorbing core 11 . The outer surface of the liquid-absorbing core 11 is in close contact with the inner surface of the shell 12 of the evaporator 1, which is used to reduce the contact thermal resistance of the radial heat transfer of the evaporator 1, and the outer surface of the liquid-absorbing core 11 and the shell 12 of the evaporator 1 A gas channel 13 is arranged between the inner surfaces to form a gas working medium flow channel, so that the gas working medium evaporated from the surface of the liquid-absorbing core 11 can be discharged outward in time. The air channel 13 can be opened on the outer surface of the liquid-absorbent core 11 or on the inner surface of the housing 12 . A liquid reservoir (not shown in the figure) can also be provided, and the liquid reservoir is communicated with the liquid-absorbing core 11 for storing excess liquid working medium, and the liquid supply of the liquid-absorbing core 11 can be adjusted by the liquid reservoir to improve the circuit heat pipe Running stability.

The condenser 2 includes a condensing pipeline 21 and a plate body 22 for fixing and cooling the condensing pipeline 21 ; or, the condenser 2 includes a condensing pipeline 21 , and fins are arranged on the outside of the condensing pipeline 21 . The condensing pipeline 21 can be made of copper, aluminum, steel, titanium alloy and other materials that are conducive to heat transfer. The condensing pipeline 21 can be a meandering serpentine pipe structure, or a side-by-side pipeline structure. The structural form that condenses the gaseous working medium into a liquid. In this embodiment, the condenser 2 includes a condensing pipeline 21 and a plate body 22, the condensing pipeline 21 is a serpentine pipeline structure, and a conversion structure 4 is provided in the area where the two ends of the condensing pipeline 21 are combined, The outlet of the condensation pipeline 21 is connected to the inlet of the inner pipe 32 as a liquid pipeline through the conversion structure 4 , and the outlet of the outer pipe 31 as a gas pipeline is connected to the inlet of the condensation pipeline 21 . The conversion structure 4 can be arranged inside the condenser 2 or outside the condenser 2. The gas working medium and the liquid working medium are separated through the conversion structure 4 and flow along their respective transmission paths.

The outlet of the condensing pipeline 21 is connected to the inlet of the inner pipe 32, the outlet of the inner pipe 32 is connected to the inlet of the evaporator 1, the outlet of the evaporator 1 is connected to the inlet of the outer pipe 31, and the outlet of the outer pipe 31 is connected to the inlet of the condensing pipeline 21, the above components are composed A full circuit. The structure of an embodiment of the sleeve-type transmission pipeline is shown in Figure 6. According to the flow resistance of the gas-liquid working medium inside the loop heat pipe and the flexibility requirements for the transmission pipeline, the diameters, parameters such as wall thickness. When the heat dissipation system is arranged, this kind of loop heat pipe only occupies the space of a very thin pipeline on the transmission path, and the outer pipe diameter of the transmission pipeline can even be only a few millimeters or smaller, and only one pipeline needs to be installed. Fixed design, so it can effectively save system space and make it easier for the system to be flexibly arranged. In order to make the loop heat pipe have better heat transfer performance and stability in a horizontal state or an anti-gravity state, a capillary structure can be set in the liquid pipeline, and the capillary structure can be composed of powder, fiber, foam metal, or several wires , fiber mesh, bundle structure, or composed of at least two of the above-mentioned structures, the capillary structure occupies all or part of the cross-sectional space on the axial cross-section of the liquid pipeline, according to the heat transfer distance of the loop heat pipe, the capillary of the liquid-absorbing core 11 Structural parameters such as pressure, design the cross-sectional size, porosity and capillary scale of the capillary structure, etc., one end of the capillary structure is connected with the condensation pipeline 21, so that the capillary structure can be easily contacted with the condensed liquid, and the other end is connected with the liquid-absorbing core 11, so that the capillary structure The liquid working medium in the structure can flow smoothly into the liquid-absorbing core 11, and through the capillary action of the capillary structure, the liquid working medium in the condenser 2 is driven to continuously flow to the evaporator 1, ensuring sufficient liquid supply to the liquid-absorbing core 11 and continuous.

Further, the gas reservoir 34 is in communication with the outer tube 31 or the inner tube 32 as a gas pipeline. When the loop heat pipe works in a low-temperature temperature zone, in order to avoid the internal pressure of the loop heat pipe exceeding the safe range under room temperature conditions, the loop heat pipe also needs to be provided with a gas storage 34, and the bypass pipeline is used to connect the gas storage 34 with the gas pipeline. The outer pipe 31 is connected, which can effectively alleviate the problem of excessive pressure of the loop heat pipe at room temperature, and also enable the gas working medium in the gas storage 34 to be continuously replenished into the loop heat pipe when the loop heat pipe operates at low temperature, thereby ensuring the loop heat pipe. There is sufficient gas-liquid two-phase working medium in the heat pipe, and through the continuous phase change and circulation of the gas-liquid working medium, the heat from the heat source is continuously transferred and dissipated to the cold source. When the loop heat pipe works in the low temperature zone, due to the large temperature difference between the loop heat pipe and the external environment, there is inevitably heat leakage, which increases the heat transfer burden of the loop heat pipe and the energy consumption of the cold source. When the environmental heat leakage is large At this time, the liquid in the liquid pipeline is likely to be heated and partially dried out, causing the loop heat pipe to work unstable or even fail. Usually, many insulation measures need to be taken, such as wrapping the outside of the loop heat pipe with anti-radiation materials, and placing the loop heat pipe in a relatively It can only operate normally in a large vacuum system. With the tube-in-tube structure, there seems to be only a very thin transmission line between the evaporator 1 and the condenser 2, which is compact in structure, takes up little space, is more convenient for wrapping radiation-proof materials, and only requires a small vacuum system It can carry out low-temperature heat transfer work, thereby greatly reducing the volume of the system, especially when the inner tube 32 is used as a liquid pipeline and the outer tube 31 is used as a gas pipeline, it is equivalent to setting a low-temperature cold shield outside the liquid pipeline , the outer tube 31 can effectively insulate the inner tube 32 to ensure that the liquid working fluid in the condenser 2 enters the evaporator 1 through the inner tube 32 smoothly, thereby improving the reliability and stability of the circuit heat pipe.

The working process of the loop heat pipe working at low temperature is taken as an example below. When the loop heat pipe is working, the gas working medium is condensed into liquid in the condenser 2. The gas working medium is constantly supplemented to the inside of the loop heat pipe. When the condensed liquid in the condensation pipeline 21 accumulates and increases, the liquid working medium enters the inner pipe 32 through the conversion structure 4, and flows into the evaporator 1 along the inner pipe 32. In the liquid-absorbing core 11, when the liquid-absorbing core 11 is filled with the liquid working medium and is fully infiltrated, a heat load is applied on the outer surface of the evaporator 1, and the heat is transferred to the inside of the evaporator 1, so that the liquid on the outer surface of the liquid-absorbing core 11 The working fluid is heated and evaporated, and the generated gas working fluid flows into the nearby gas channel 13, and then flows into the outer tube 31. The gas working fluid enters the condensation pipeline 21 through the conversion structure 4 at the end of the outer tube 31, and is re-condensed in the condensation pipeline 21. Condensate into a liquid working medium. At the same time, driven by the capillary action on the surface of the liquid-absorbing core 11, the liquid working medium in the condenser 2 is continuously flowed and replenished into the evaporator 1 along the inner tube 32. Continuous circulation and gas-liquid phase change in the loop transfer the heat from the evaporator 1 to the condenser 2 continuously.

The compact loop heat pipe provided by the utility model, the condenser 2, the liquid pipeline, the evaporator 1, and the gas pipeline are sequentially connected to form a loop structure. The liquid pipeline and the gas pipeline adopt a pipe-in-tube structure. The shape of the loop heat pipe is simple, The structure is compact, it takes up less space in the heat dissipation system, and it is more convenient for the flexible layout of the system, especially for the loop heat pipe working in a low temperature environment, the transmission pipeline adopts a tube-in-tube structure, and the outer tube 31 can form effective heat insulation for the inner tube 32 protection, greatly reducing the heat leakage from the outside to the environment of the inner pipe 32, and it is easier to wrap radiation-proof materials or thermal insulation materials on the outer pipe 31, so as to reduce the heat leakage from the outside to the environment of the transmission pipeline and reduce the cold source to the cold source. To meet the demand, improve the working stability and reliability of the loop heat pipe.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (10)

1. A compact loop heat pipe is characterized in that it comprises an evaporator (1), a condenser (2) and a transmission line (3), and the evaporator (1) and the condenser (2) pass through the transmission line The pipeline (3) is connected, and the transmission pipeline (3) includes an outer tube (31) and an inner tube (32), and the outer tube (31) is sleeved on the outside of the inner tube (32), and the A support structure (33) is provided between the outer tube and the inner tube. 2. The compact loop heat pipe according to claim 1, characterized in that there is at least one support structure (33). 3. The compact loop heat pipe according to claim 1, characterized in that, the support structure (33) is a support bar arranged along the length direction of the transmission pipeline (3), and the width direction of the support bar One side of the support bar is connected with the inner side of the outer tube (31), and the other side of the support bar in the width direction is connected with the outer side of the inner tube (32). 4. The compact loop heat pipe according to claim 1, characterized in that, the outer tube (31), the inner tube (32) and the supporting structure (33) are integrally formed; or, the outer tube (31) integrally formed with the support structure (33), the inner tube (32) is detachably arranged on the support structure (33); or, the inner tube (32) and the support structure (33) are integrally formed, The outer tube (31) is detachably arranged on the support structure (33). 5. The compact loop heat pipe according to claim 1, characterized in that, the condenser (2) communicates with the transfer pipeline (3) through a conversion structure (4), and the conversion structure (4 ) is arranged outside or inside the condenser (2). 6. The compact loop heat pipe according to any one of claims 1 to 5, characterized in that, the evaporator (1) comprises a shell (12) and a liquid-absorbing core (11), and the liquid-absorbing core (11) is arranged inside the housing (12). 7. The compact loop heat pipe according to claim 6, characterized in that capillary structures are arranged inside the inner tube (32) and/or the outer tube (31). 8. The compact loop heat pipe according to claim 7, wherein the capillary structure is at least one; the capillary structure is a microgroove structure, a powder structure, a fiber structure or a foam metal structure; or, the The capillary structure is a network or bundle structure made of metal wires or fibers. 9. The compact loop heat pipe according to claim 6, characterized in that, the evaporator further comprises a baffle (14), and the baffle (14) and the liquid-absorbing wick (11) separate the shell The inner cavity of the body (12) is divided into a gas cavity and a liquid cavity; the outer tube (31) communicates with the gas cavity of the housing (12), and the inner tube (32) passes through the baffle plate (14 ) into the inside of the liquid-absorbent core (11). 10. The compact loop heat pipe according to claim 1, characterized in that, it also comprises a gas storage (34), and the gas storage (34) is connected with the outer tube (31) or the inner tube as a gas pipeline. Pipe (32) is connected.