A loop heat pipe structure

Abstract

The present application discloses a loop heat pipe structure, which relates to the technical field of heat pipes and includes an evaporator housing communicated with a steam pipeline; a liquid reservoir including a first liquid storage chamber and a second liquid storage chamber, the first liquid storage chamber and the second liquid storage chamber are respectively arranged at two ends of the evaporator housing; a wick arranged in the evaporator housing; a liquid pipeline including a liquid phase pipe and a lead pipe communicated with each other, the lead pipe sequentially penetrates through the first liquid storage chamber, the wick and the second liquid storage chamber; wherein, a first nozzle and a second nozzle are arranged on the lead pipe; a sleeve is slidably sleeved on the lead pipe, and the sleeve can slide along the lead pipe under the action of gravity to close the first nozzle or the second nozzle. This device does not require external energy drive. By using the structural design of the working fluid pipeline and the sleeve, the working fluid is moved to both ends of the wick, realizing that the working fluid can be in good contact with the wick under various placement conditions, thereby infiltrating the wick and improving the running stability of the device.

Description

Technical Field

[0001] This application relates to the technical field of heat pipes, and particularly to a loop heat pipe structure. Background Art

[0002] The development of miniaturization and high power of electronic devices inevitably brings serious heat dissipation problems, which become the key factors restricting the reliable operation of electronic devices. A loop heat pipe is an efficient heat exchange device that uses the phase change of a working fluid to generate a loop pressure difference to achieve the circulating flow of the working fluid for heat transfer. It not only meets the requirements of space detectors for high-efficiency heat exchange and high temperature uniformity, but also has strong flexibility in its gas-liquid pipelines, enabling long-distance heat transfer and preventing the detector from being disturbed by the mechanical vibration of the refrigerator. At the same time, it can be installed in complex spaces. The loop heat pipe relies on the capillary force of the capillary core to drive the internal working fluid to flow. The entire system does not require moving parts and has the characteristics of a long service life and high operating reliability. The advantages of the loop heat pipe, such as strong heat transfer ability, long transmission distance, low heat transfer resistance, good isothermal property, convenient installation, no moving parts, and no external force drive, also make it highly favored in the heat management fields such as electronic cooling, battery thermal management, solar photovoltaic / thermal systems, waste heat recovery, aerospace, and military equipment.

[0003] However, different from the good operating performance of the LHP in the space microgravity environment, the gravity and acceleration in the ground environment have a great impact on the single-reservoir LHP. Once the reservoir is located below the evaporator, due to the gravity effect, the liquid will accumulate in the reservoir, resulting in difficult liquid supply to the evaporator, interfering with the normal operation of the LHP and leading to operation failure. Although some researchers have used a secondary capillary core to connect the main capillary core and the reservoir, and used the secondary capillary core to drive the working fluid into the main capillary core to ensure that the working fluid can be supplied to the evaporator under anti-gravity or acceleration fields, due to the relatively large flow resistance of the liquid in the secondary capillary core, the heat transfer ability of the LHP is greatly reduced. At present, how to make the loop heat pipe work properly in various orientations has become a problem to be solved.

[0004] In today's society, the pace of modernization and high efficiency continues. Electronic devices play a crucial role in production and life. As a widely used high-efficiency heat exchange device, if the LHP cannot adapt to various working environments and maintain good working performance, it will increase energy consumption, damage the machine, and cause waste, thus restricting the reliable operation of the machine to a certain extent. Therefore, in order to maintain good performance and reduce unnecessary energy consumption, it is urgent to design a device to solve the problem that the LHP cannot work properly in the non-gravity direction. Summary of the Invention

[0005] To solve the above technical problems, this application provides a loop heat pipe structure.

[0006] On the one hand, a loop heat pipe structure provided by the present application adopts the following technical solutions:

[0007] A loop heat pipe structure includes:

[0008] An evaporator housing, both ends of the evaporator housing are provided with openings, and the evaporator housing is communicated with a steam pipeline;

[0009] A liquid reservoir, the liquid reservoir includes a first liquid storage chamber and a second liquid storage chamber, the first liquid storage chamber and the second liquid storage chamber are respectively arranged at both ends of the evaporator housing, and the first liquid storage chamber and the second liquid storage chamber are respectively communicated with the openings at both ends of the evaporator housing;

[0010] A wick is arranged inside the evaporator housing;

[0011] A liquid pipeline, the liquid pipeline includes a liquid phase pipe and a lead pipe that are communicated with each other, and the lead pipe sequentially passes through the first liquid storage chamber, the wick and the second liquid storage chamber;

[0012] Wherein, a first nozzle and a second nozzle are arranged on the lead pipe, the first nozzle is located in the first liquid storage chamber, and the second nozzle is located in the second liquid storage chamber;

[0013] A sleeve is slidably sleeved on the lead pipe, and the sleeve can slide along the lead pipe under the action of gravity and close the first nozzle or the second nozzle.

[0014] By adopting the above technical solutions, when the device of the present application operates, the working medium moves towards the inside of the evaporator through the liquid phase pipe and the lead pipe, that is, moves in the direction from the first liquid storage chamber to the second liquid storage chamber. When the moving direction of the working medium is opposite to the direction of gravity, the sleeve slides downwards and blocks the first nozzle, so that the working medium can only be ejected from the second nozzle. After the working medium enters the second liquid storage chamber, due to the gravity effect, it can contact the wick inside the evaporator; on the contrary, when the moving direction of the working medium is the same as the direction of gravity, the sleeve will block the second nozzle, so that the working medium can only be ejected from the first nozzle. After the working medium enters the first liquid storage chamber, due to the gravity effect, the working medium can also contact the wick inside the evaporator. The contact area between the wick and the working medium is increased, so that the working medium can be better supplied to the evaporator under the anti-gravity or acceleration field, ensuring stable operation. In the inclined working condition environment of the present application, the liquid in one liquid storage chamber is normally replenished to balance the consumption; no additional working medium is added to the non-functional liquid storage chamber on the other side, ensuring a reasonable working medium ratio inside the liquid storage chamber.

[0015] This device is driven without external energy. By using the structural design of adding a sleeve to the working fluid pipeline, the working fluid is moved to both ends of the wick, achieving good contact between the working fluid and the wick in various placement situations, thereby infiltrating the wick. Compared with the existing loop heat pipe evaporator, it cleverly solves the problem that in some placement states, the wick cannot be infiltrated in time, resulting in the phenomenon of "dry burning", which causes poor heat dissipation of some components of the machine and increases energy consumption. This design enables the loop heat pipe to exchange heat more stably and efficiently, reduces the additional energy consumption generated by the machine, and makes a substantial contribution to energy conservation and emission reduction.

[0016] Optionally, a support platform for abutting against the inner wall of the sleeve is fixedly arranged on the guiding pipe, and two support platforms are arranged at intervals.

[0017] Optionally, two limiting rings for abutting against the support platform to limit the position of the sleeve are fixedly arranged in the sleeve. When the limiting ring abuts against the support platform, the first nozzle or the second nozzle is closed by the sleeve.

[0018] Optionally, the sleeve includes an outer shell, an inner shell and end rings. The outer shell is sleeved on the inner shell. The end rings are arranged at both ends of the sleeve, and the end rings are respectively connected to the outer shell and the inner shell. A cavity is arranged between the outer shell and the inner shell, and a plurality of gravity balls are arranged in the cavity. The gravity balls can roll in the sleeve.

[0019] By adopting the above technical solution, when the device is in an inclined state, the gravity balls in the cavity will move downward and impact the end ring at the bottom, thereby driving the sleeve to slide downward more smoothly, reducing the influence of friction on the sleeve, and improving the stability of the loop heat pipe during long-term operation.

[0020] Optionally, both the first nozzle and the second nozzle include a flow splitting disk. An outlet is arranged on the side wall of the flow splitting disk for fitting with the inner wall of the sleeve, and the outlet is communicated with the guiding pipe.

[0021] Optionally, both the first nozzle and the second nozzle are arranged far away from the wick.

[0022] By adopting the above technical solution, the first nozzle and the second nozzle are arranged at one end far away from the wick. When in an inclined state, the sprayed cooling working fluid is located at the upper end of the first liquid storage chamber or the second liquid storage chamber, so that the cooling working fluid is fully mixed with the cooling working fluid in the first liquid storage chamber or the second liquid storage chamber before reaching the wick, ensuring a constant cooling temperature of the cooling working fluid, enabling the loop heat pipe to operate stably in environments with different gravity directions, and improving the heat dissipation stability of electronic devices; at the same time, if there are a small number of bubbles in the sprayed cooling working fluid, they can directly converge at the upper cavity of the first liquid storage chamber or the second liquid outlet chamber, preventing the cooling working fluid containing bubbles from entering the wick, so as to prevent bubbles from entering the capillary wick and affecting the normal operation of the evaporator.

[0023] Optionally, a steam channel is provided on the outer surface of the wick, and the steam pipeline is communicated with the steam channel.

[0024] Optionally, the steam channel is located below the wick.

[0025] By adopting the above technical solution, after heat exchange, the steam channel is located below the wick, enabling the working medium to come into contact with the steam channel more fully, increasing the contact area, and thus effectively improving the heat dissipation effect.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. When the device of the present application is operating, the working medium moves towards the inside of the evaporator through the liquid phase pipe and the guiding pipe, that is, in the direction from the first liquid storage chamber to the second liquid storage chamber. When the moving direction of the working medium is opposite to the direction of gravity, the sleeve slides downward and blocks the first nozzle, so that the working medium can only be ejected from the second nozzle. After the working medium enters the second liquid storage chamber, it can come into contact with the wick inside the evaporator due to the gravity effect; conversely, when the moving direction of the working medium is the same as the direction of gravity, the sleeve will block the second nozzle, so that the working medium can only be ejected from the first nozzle. After the working medium enters the first liquid storage chamber, the working medium can also come into contact with the wick inside the evaporator due to the gravity effect. The contact area between the wick and the working medium is increased, enabling the working medium to be supplied to the evaporator under anti-gravity or acceleration fields, ensuring stable operation.

[0028] 2. When the device is in an inclined state, the gravity ball in the cavity will move downward and impact the end ring at the bottom, thereby driving the sleeve to slide downward more smoothly, reducing the influence of friction on the sleeve, and improving the stability of the loop heat pipe during long-term operation.

[0029] 3. The first nozzle and the second nozzle are arranged at one end far from the wick. When in an inclined state, the ejected cooling working medium is located at the upper end of the first liquid storage chamber or the second liquid storage chamber, enabling the ejected cooling working medium to be fully mixed with the cooling working medium in the first liquid storage chamber or the second liquid storage chamber before reaching the wick, ensuring a constant cooling temperature of the cooling working medium, so that the loop heat pipe can operate stably in environments with different gravity directions, improving the heat dissipation stability of electronic devices; meanwhile, during this process, the ejected low-temperature working medium can also cool the space of the liquid storage chamber itself. Furthermore, it plays a role in cooling the cavity of the liquid storage chamber itself and the working medium in the liquid storage chamber, preventing temperature fluctuations.

[0030] Moreover, if there are a small number of bubbles in the ejected cooling working medium, they can directly converge at the upper cavity of the first liquid storage chamber or the second liquid outlet chamber, preventing the cooling working medium containing bubbles from entering the wick, so as to prevent bubbles from entering the capillary wick and affecting the normal operation of the evaporator.

[0031] 4. In the inclined working condition environment of this application, the working medium in the non-functional liquid storage chamber on one side will no longer increase, thus ensuring a stable distribution of the working medium. Description of the Drawings

[0032] Figure 1 is the overall structural schematic diagram of the embodiment of this application;

[0033] Figure 2 is the cross-sectional view of the casing of the embodiment of this application.

[0034] Description of the reference numerals in the drawings: 1, evaporator housing; 2, liquid absorption core; 31, first liquid storage chamber; 32, second liquid storage chamber; 4, liquid pipeline; 41, liquid phase pipe; 42, guiding pipe; 421, supporting platform; 422, limiting ring; 5, steam channel; 51, fin; 52, steam pipeline; 6, condenser; 71, first nozzle; 72, second nozzle; 73, flow dividing plate; 731, liquid outlet; 8, casing; 81, outer shell; 82, inner shell; 83, end ring; 84, gravity ball. Detailed Embodiment

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0037] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0039] As a widely used high-efficiency heat exchange device, if the LHP cannot adapt to various working environments and maintain good working performance, it will increase energy consumption, damage the machine, and cause waste, so to a certain extent, it limits the reliable operation of the machine.

[0040] The inventor found that the liquid storage chamber and the wick of the evaporator component are located on both sides of it. There is always a gravity direction in which the working fluid cannot contact the wick, making it difficult to supply liquid to the evaporator and causing the entire loop heat pipe to fail. Although the existing double liquid storage chamber structure can add a direction for the working fluid to contact the wick to initially solve the above problem, it still cannot control and solve the other two problems faced by the evaporator - the distribution of the working fluid in the liquid reservoir and the constant temperature of the working fluid.

[0041] For the former, if the liquid reservoir is filled with an incompressible liquid working fluid and the surplus is exhausted, the excess condensate generated by the condenser cannot flow back to the liquid reservoir, causing the temperature and pressure inside the liquid reservoir to continue to rise. The saturation pressure of the working fluid at the evaporator end follows suit and finally reaches a new equilibrium, and the LHP reaches the heat exchange limit. For the latter, due to the problem of heat leakage in the traditional loop heat pipe, a part of the heat will directly conduct from the evaporation area to the liquid storage chamber, causing the temperature of the working fluid inside it to rise and directly generate steam and be in a two-phase state. If there is gas-liquid interface movement in the liquid storage chamber, it will affect the reflux of the working fluid and cause system temperature oscillation.

[0042] Therefore, the embodiments of the present application disclose a loop heat pipe structure.

[0043] Referring to Figure 1 , a loop heat pipe structure includes an evaporator housing 1, a liquid reservoir, a wick 2, and a liquid pipeline 4. Openings are provided at both ends of the evaporator housing 1, and the wick 2 is arranged inside the evaporator housing 1. The liquid reservoir includes a first liquid storage chamber 31 and a second liquid storage chamber 32. The first liquid storage chamber 31 and the second liquid storage chamber 32 are respectively arranged at both ends of the evaporator housing 1, and the first liquid storage chamber 31 and the second liquid storage chamber 32 are respectively communicated with the openings at both ends of the evaporator housing 1.

[0044] Referring to Figure 1 , the liquid pipeline 4 includes a liquid phase pipe 41 and a lead pipe 42 that communicate with each other. The lead pipe 42 is sequentially disposed through the first liquid storage chamber 31, the liquid absorption core 2, and the second liquid storage chamber 32. One end of the lead pipe 42 located in the second liquid storage chamber 32 is closed to prevent the working fluid in the lead pipe 42 from discharging from the port. In this implementation, acetone is selected as the working fluid.

[0045] Referring to Figure 1 , a steam channel 5 is provided on the outer surface of the liquid absorption core 2. The steam channel 5 includes a plurality of fins 51 distributed at intervals. The fins 51 are square structures. Optionally, the steam channel 5 is located below the liquid absorption core 2.

[0046] The steam channel 5 uses square fins 51, which have better contact and good heat dissipation effect. The steam channel 5 is located below the liquid absorption core 2, enabling the working fluid to contact the steam channel 5 more fully, increasing the contact area, and thus effectively improving the heat dissipation effect.

[0047] The evaporator housing 1 is connected to a steam pipeline 52. One end of the steam pipeline 52 communicates with the steam channel 5, and the other end communicates with the liquid phase pipe 41. A condenser 6 is provided between the liquid phase pipe 41 and the steam pipeline 52.

[0048] Among them, referring to Figure 1 and Figure 2 , a first nozzle 71 and a second nozzle 72 are provided on the lead pipe 42. The first nozzle 71 is located in the first liquid storage chamber 31, and the second nozzle 72 is located in the second liquid storage chamber 32. A sleeve 8 is slidably sleeved on the lead pipe 42. Under the action of gravity, the sleeve 8 can slide along the lead pipe 42 and close the first nozzle 71 or the second nozzle 72. Both the lead pipe 42 and the sleeve 8 are cylindrical structures and can be made of stainless steel. The inner wall of the sleeve 8 is smoothly arranged to reduce friction.

[0049] Referring to Figure 1 and Figure 2 , a support platform 421 for abutting against the inner wall of the sleeve 8 is fixedly provided on the lead pipe 42. Two support platforms 421 are provided at intervals. The two support platforms 421 are respectively located in the first liquid storage chamber 31 and the second liquid storage chamber 32. The support platform 421 is a frustum-shaped structure. The support platform 421 fits the inner wall of the sleeve 8 and plays a role in guiding the sleeve 8 during the movement of the sleeve 8 to ensure the stable operation of the sleeve 8.

[0050] Optionally, two limit rings 422 for abutting against the support platform 421 to limit the position of the sleeve 8 are fixedly provided in the sleeve 8. When the limit rings 422 abut against the support platform 421, the first nozzle 71 or the second nozzle 72 is closed by the sleeve 8. The limit rings 422 play a role in limiting the position of the sleeve 8 to prevent the sleeve 8 from sliding excessively.

[0051] Optionally, the sleeve 8 includes an outer shell 81, an inner shell 82 and end rings 83. The outer shell 81 is sleeved on the inner shell 82. The end rings 83 are arranged at both ends of the sleeve 8 and are respectively connected to the outer shell 81 and the inner shell 82. A cavity is arranged between the outer shell 81 and the inner shell 82. A plurality of gravity balls 84 are arranged in the cavity. The gravity balls 84 can roll in the sleeve 8. The gravity balls 84 are smooth steel balls.

[0052] When the device is in an inclined state, the gravity balls 84 in the cavity will move downward and impact the end ring 83 at the bottom, thereby driving the sleeve 8 to slide downward more smoothly, reducing the influence of friction on the sleeve 8, and improving the stability of the loop heat pipe during long-term operation.

[0053] Optionally, referring to Figure 1 and Figure 2 , both the first nozzle 71 and the second nozzle 72 include a flow splitting disc 73. The side wall of the flow splitting disc 73 for fitting with the inner wall of the sleeve 8 is provided with liquid outlets 731. The liquid outlets 731 are communicated with the lead pipe 42. A plurality of liquid outlets 731 are arranged along the circumferential direction of the flow splitting disc 73, increasing the range of the working medium sprayed out and ensuring sufficient contact with the working medium in the first liquid storage chamber 31 or the second liquid storage chamber 32.

[0054] Referring to Figure 1 and Figure 2 , both the first nozzle 71 and the second nozzle 72 are arranged far away from the wick 2. In this embodiment, the distances from the first nozzle 71 and the second nozzle 72 to the wick 2 are not less than half of the length of the first liquid storage chamber 31 or the second liquid storage chamber 32, and there is a certain distance between the first nozzle 71 and the second nozzle 72 and the top of the first liquid storage chamber 31 or the second liquid storage chamber 32 respectively; the lengths of the first liquid storage chamber 31 and the second liquid storage chamber 32 are the lengths along the axial direction of the lead pipe 42.

[0055] The nozzles are arranged at positions with a certain distance from both sides between the top of the liquid storage chamber and the surface of the wick 2, which can enable the low-temperature liquid working medium that returns to the first liquid storage chamber 31 and the second liquid storage chamber 32 after the cooling cycle to slowly flow down from top to bottom when sprayed out by the first nozzle 71 and the second nozzle 72, and mix with the working medium that has been heated due to heat leakage in the liquid storage chamber from the top to keep it at a constant temperature. In this process, the low-temperature liquid working medium can also cool the "liquid storage chamber" space itself at the same time. After the low-temperature liquid working medium after the condenser cycle is sprayed out through the nozzles (the first nozzle 71 and the second nozzle 72), it slowly flows from top to bottom, that is, it flows in the direction close to the wick 2 after being sprayed out, and mixes with the original heated working medium in the liquid storage chamber from the top to cool it; at the same time, the low-temperature working medium sprayed out in this process can also cool the liquid storage chamber space itself. Furthermore, it can play a role in cooling the liquid storage chamber cavity itself and the working medium in the liquid storage chamber, preventing temperature fluctuations.

[0056] The first nozzle 71 and the second nozzle 72 are arranged at one end away from the liquid wick 2. When in an inclined state, the sprayed cooling medium is located at the upper end of the first liquid storage chamber 31 or the second liquid storage chamber 32, so that the cooling medium is fully mixed with the cooling medium in the first liquid storage chamber 31 or the second liquid storage chamber 32 before reaching the liquid wick 2, thereby ensuring a constant cooling temperature of the cooling medium, so that the loop heat pipe can operate smoothly in environments with different gravity directions, thereby improving the heat dissipation stability of electronic devices; at the same time, if the sprayed cooling medium contains a small amount of bubbles, it can be directly gathered in the upper end cavity of the first liquid storage chamber 31 or the second liquid outlet chamber, thereby preventing the cooling medium containing bubbles from entering the liquid wick 2, thereby preventing the bubbles from entering the capillary core and affecting the normal operation of the evaporator.

[0057] The implementation principle of the embodiment of the present application is as follows: when the device of the present application is in operation, the working fluid moves toward the inside of the evaporator through the liquid phase tube 41 and the guide tube 42, that is, moves in the direction from the first liquid storage chamber 31 to the second liquid storage chamber 32. When the moving direction of the working fluid is opposite to the direction of gravity, the sleeve 8 slides downward and blocks the first nozzle 71, so that the working fluid can only be ejected from the second nozzle 72. After the working fluid enters the second liquid storage chamber 32, it can contact the liquid wick 2 inside the evaporator due to the gravity effect; on the contrary, when the moving direction of the working fluid is the same as the direction of gravity, the sleeve will block the second nozzle 72, so that the working fluid can only be ejected from the first nozzle 71. After the working fluid enters the first liquid storage chamber 31, it can also contact the liquid wick 2 inside the evaporator due to the gravity effect. Increase the contact area between the liquid wick 2 and the working fluid, so that the working fluid can be supplied to the evaporator under anti-gravity or acceleration field, ensuring smooth operation. In the scene of complex gravity environment and acceleration on the ground, the normal and stable operation of the loop heat pipe can be guaranteed.

[0058] The distribution of the working fluid in the liquid storage chamber of the loop heat pipe evaporator also has a great influence on the heat exchange performance of the heat pipe. Once the liquid storage chamber is filled with incompressible liquid working fluid, the remaining amount inside the liquid storage chamber is used up, and the excess low-temperature working fluid generated by the condenser cannot flow back to the liquid storage chamber in time, causing the temperature and pressure inside the liquid storage chamber to continue to rise, and the working fluid saturation pressure at the evaporator end will increase accordingly, eventually reaching a new balance, and the loop heat pipe reaches the heat exchange limit. The current dual liquid storage structure only adds a direction for the working fluid to contact the liquid absorption core, but it still cannot control the distribution of the working fluid; and the present application can prevent the working fluid from being added to the liquid storage chamber on the side that does not work under an inclined working condition, thereby ensuring a stable distribution of the working fluid.

[0059] This device is driven without external energy. By using the structural design of adding a sleeve 8 to the working fluid pipeline, the working fluid is moved to both ends of the wick 2, achieving good contact between the working fluid and the wick 2 in various placement situations, thereby infiltrating the wick 2. Compared with the existing loop heat pipe evaporator, it cleverly solves the problem that in some placement states, the wick 2 may experience the phenomenon of "dry burning" because it cannot be infiltrated in time, resulting in poor heat dissipation of some components of the machine and increased energy consumption. This design enables the loop heat pipe to exchange heat more stably and efficiently, reduces the additional energy consumption generated by the machine, and makes a substantial contribution to energy conservation and emission reduction.

[0060] The above are all preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A loop heat pipe structure, characterized in that: include: An evaporator shell (1), wherein both ends of the evaporator shell (1) are provided with openings, and the evaporator shell (1) is connected to a steam pipeline (52); A liquid reservoir, the liquid reservoir comprising a first liquid storage chamber (31) and a second liquid storage chamber (32), the first liquid storage chamber (31) and the second liquid storage chamber (32) being respectively arranged at two ends of an evaporator shell (1), and the first liquid storage chamber (31) and the second liquid storage chamber (32) being respectively connected to openings at two ends of the evaporator shell (1); A liquid wick (2) is arranged in the evaporator shell (1); A liquid pipeline (4), the liquid pipeline (4) comprising a liquid phase pipe (41) and a guide pipe (42) which are interconnected, the guide pipe (42) being sequentially arranged in the first liquid storage chamber (31), the liquid wick (2) and the second liquid storage chamber (32); Wherein, the guide tube (42) is provided with a first nozzle (71) and a second nozzle (72), the first nozzle (71) is located in the first liquid storage chamber (31), and the second nozzle (72) is located in the second liquid storage chamber (32); A sleeve (8) is slidably sleeved on the guide tube (42), and the sleeve (8) can slide along the guide tube (42) under the action of gravity and close the first nozzle (71) or the second nozzle (72); A support platform (421) is fixedly provided on the guide tube (42) for contacting the inner wall of the sleeve (8), and two support platforms (421) are arranged at intervals; Two limiting rings (422) are fixedly arranged inside the sleeve (8) and are used to abut against the support platform (421) to limit the position of the sleeve (8); when the limiting rings (422) abut against the support platform (421), the first nozzle (71) or the second nozzle (72) is closed by the sleeve (8); The sleeve (8) comprises an outer shell (81), an inner shell (82) and an end ring (83); the outer shell (81) is sleeved on the inner shell (82); the end ring (83) is arranged at both ends of the sleeve (8), and the end ring (83) is respectively connected to the outer shell (81) and the inner shell (82); a cavity is arranged between the outer shell (81) and the inner shell (82); a plurality of gravity balls (84) are arranged in the cavity; and the gravity balls (84) are capable of rolling in the sleeve (8).

2. A loop heat pipe structure according to claim 1, characterized in that: The first nozzle (71) and the second nozzle (72) both comprise a flow distribution plate (73), the flow distribution plate (73) having a side wall adapted to fit the inner wall of the sleeve (8) and having a liquid outlet (731), the liquid outlet (731) being in communication with the guide tube (42).

3. A loop heat pipe structure according to claim 1, characterized in that: The first nozzle (71) and the second nozzle (72) are both arranged away from the liquid absorbent core (2).

4. A loop heat pipe structure according to claim 1, characterized in that: The outer surface of the liquid absorbent core (2) is provided with a steam channel (5), and the steam pipeline (52) is in communication with the steam channel (5).

5. A loop heat pipe structure according to claim 4, characterized in that: The steam channel (5) is located below the liquid absorbent core (2).

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