Loop heat pipe structure

Abstract

The invention discloses a loop heat pipe structure, and relates to the technical field of heat pipes, the loop heat pipe structure comprises an evaporator shell, and the evaporator shell communicates with a steam pipeline; the liquid storage device comprises a first liquid storage chamber and a second liquid storage chamber, and the first liquid storage chamber and the second liquid storage chamber are arranged at the two ends of the evaporator shell correspondingly; the wick is arranged in the evaporator shell; the liquid pipeline comprises a liquid phase pipe and a guide pipe which are communicated with each other, and the guide pipe sequentially penetrates through the first liquid storage chamber, the liquid absorption core and the second liquid storage chamber; wherein a first nozzle and a second nozzle are arranged on the guide pipe; the guide pipe is slidably sleeved with a sleeve, and the sleeve can slide along the guide pipe under the action of gravity and seal the first nozzle or the second nozzle. The device is not driven by external energy, the working medium is moved to the two ends of the wick by utilizing the structural design of the working medium pipeline and the sleeve, and the working medium can be in good contact with the wick under various placement conditions, so that the wick is infiltrated, and the running stability of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat pipes, and in particular to a loop heat pipe structure. Background Art

[0002] The development of miniaturization and high power of electronic equipment inevitably brings serious heat dissipation problems, and becomes a key factor restricting the reliable operation of electronic equipment. Loop Heat Pipe is a high-efficiency heat exchange device that uses the phase change of the working fluid to generate a loop pressure difference to realize the circulation of the working fluid and transfer heat. It not only meets the needs of space probes for efficient heat exchange and high temperature uniformity, but also has strong flexibility in its gas-liquid pipeline, which can realize long-distance heat transmission and prevent 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 flow of the internal working fluid. The entire system does not require moving parts and has the characteristics of long service life and high operational reliability. The advantages of loop heat pipes, such as strong heat transfer capacity, long transmission distance, low heat transfer resistance, good isothermal performance, easy installation, no moving parts and no need for external force drive, also make it popular in thermal management fields such as electronic cooling, battery thermal management, solar photovoltaic / thermal systems, waste heat recovery, aerospace and military equipment.

[0003] However, unlike the good operating performance of LHP in the microgravity environment of space, the gravity and acceleration of the ground environment have a great impact on the single-reservoir LHP. Once the reservoir is located below the evaporator, the liquid will accumulate in the reservoir due to the gravity effect, making it difficult to supply liquid to the evaporator, which will interfere with the normal operation of the LHP and lead to operational failure. Although some researchers have used a secondary capillary wick to connect the main capillary wick and the reservoir, and used the secondary capillary wick to drive the working fluid into the main capillary wick, ensuring that the working fluid can be supplied to the evaporator under anti-gravity or acceleration fields, the flow resistance of the liquid in the secondary capillary wick is relatively large, which greatly reduces the heat transfer capacity of the LHP. At present, how to make the loop heat pipe work normally in various orientations has become a problem that needs to be solved.

[0004] Today's society is moving towards modernization and efficiency, and electronic equipment plays an important role in production and life. As a widely used high-efficiency heat exchange device, if LHP cannot adapt to various working environments and maintain good working performance, it will increase energy consumption, damage the machine, and cause waste, thus limiting 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 LHP cannot work properly in the non-gravity direction. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a loop heat pipe structure.

[0006] On the one hand, the present application provides a loop heat pipe structure, which adopts the following technical solution: A loop heat pipe structure, comprising: An evaporator shell, both ends of which are provided with openings, and the evaporator shell is connected with a steam pipeline; A liquid reservoir, the liquid reservoir comprising 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 shell, and the first liquid storage chamber and the second liquid storage chamber are respectively communicated with openings at two ends of the evaporator shell; A liquid wick, disposed in the evaporator shell; A liquid pipeline, the liquid pipeline comprising a liquid phase pipe and a guide pipe which are interconnected, the guide pipe being sequentially arranged in the first liquid storage chamber, the liquid wick and the second liquid storage chamber; The guide tube is provided with a first nozzle and a second nozzle, the first nozzle is located in the first liquid storage chamber, and the second nozzle is located in the second liquid storage chamber; A sleeve is slidably sleeved on the guide tube, and the sleeve can slide along the guide tube under the action of gravity and close the first nozzle or the second nozzle.

[0007] By adopting the above technical solution, when the device of the present application is in operation, the working fluid moves to the inside of the evaporator through the liquid phase tube and the guide tube, 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 fluid is opposite to the direction of gravity, the sleeve slides downward and blocks the first nozzle, so that the working fluid can only be sprayed out from the second nozzle. After the working fluid enters the second liquid storage chamber, it can contact the liquid wick inside the evaporator due to the gravity effect; conversely, when the moving direction of the working fluid is the same as the direction of gravity, the sleeve will block the second nozzle, so that the working fluid can only be sprayed out from the first nozzle. After the working fluid enters the first liquid storage chamber, it can also contact the liquid wick inside the evaporator due to the gravity effect. Increase the contact area between the liquid wick and the working fluid, so that the working fluid can be better supplied to the evaporator under anti-gravity or acceleration field, ensuring smooth operation. In this application, under an inclined working condition, the liquid storage chamber on one side normally replenishes the working fluid to balance the consumption; the liquid storage chamber on the other side that does not play a role no longer adds working fluid, ensuring a reasonable proportion of working fluid inside the liquid storage chamber.

[0008] This device does not require external energy to drive, and uses the structural design of the working fluid pipeline plus the sleeve to move the working fluid to the two ends of the liquid wick, so that the working fluid can be in good contact with the liquid wick in various placement conditions, thereby soaking the liquid wick. Compared with the existing loop heat pipe evaporator, it cleverly solves the problem that in certain placement conditions, the liquid wick cannot be soaked in time and "burns dry", resulting in poor heat dissipation of some parts of the machine and increased energy consumption. This design allows 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.

[0009] Optionally, a support platform for contacting with the inner wall of the sleeve is fixedly provided on the guide tube, and two support platforms are arranged at intervals.

[0010] Optionally, two limiting rings are fixedly disposed in the sleeve and are used to abut against the support platform to limit the position of the sleeve. When the limiting rings abut against the support platform, the first nozzle or the second nozzle is closed by the sleeve.

[0011] 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, a plurality of gravity balls are arranged in the cavity, and the gravity balls can roll in the sleeve.

[0012] By adopting the above technical solution, when the device is in a tilted 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 impact of friction on the sleeve and improving the stability of the loop heat pipe during long-term operation.

[0013] Optionally, both the first nozzle and the second nozzle include a diverter plate, and a side wall of the diverter plate that is in contact with the inner wall of the sleeve is provided with a liquid outlet, and the liquid outlet is connected to the guide tube.

[0014] Optionally, the first nozzle and the second nozzle are both arranged away from the liquid-absorbing core.

[0015] By adopting the above technical solution, the first nozzle and the second nozzle are arranged at one end away from the liquid wick. When in an inclined state, the sprayed cooling medium is located at the upper end of the first liquid storage chamber or the second liquid storage chamber, so that the cooling medium is fully mixed with the cooling medium in the first liquid storage chamber or the second liquid storage chamber before reaching the liquid wick, 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 at the upper end cavity of the first liquid storage chamber or the second liquid outlet chamber, thereby preventing the cooling medium containing bubbles from entering the liquid wick, thereby preventing the bubbles from entering the capillary core and affecting the normal operation of the evaporator.

[0016] Optionally, a steam channel is provided on the outer surface of the liquid absorbent core, and the steam pipeline is connected to the steam channel.

[0017] Optionally, the steam channel is located below the absorbent core.

[0018] By adopting the above technical solution, after heat exchange, the steam channel is located below the liquid wick, so that the working fluid can contact the steam channel more fully, increasing the contact area, thereby effectively improving the heat dissipation effect.

[0019] In summary, the present application includes at least one of the following beneficial technical effects: 1. 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 and the guide tube, that is, moves from the first liquid storage chamber to the second liquid storage chamber. When the moving direction of the working fluid is opposite to the direction of gravity, the sleeve slides downward and blocks the first nozzle, so that the working fluid can only be ejected from the second nozzle. After the working fluid enters the second liquid storage chamber, it can contact the liquid wick inside the evaporator due to the gravity effect; conversely, when the moving direction of the working fluid is the same as the direction of gravity, the sleeve will block the second nozzle, so that the working fluid can only be ejected from the first nozzle. After the working fluid enters the first liquid storage chamber, it can also contact the liquid wick inside the evaporator due to the gravity effect. The contact area between the liquid wick and the working fluid is increased, so that the working fluid can be supplied to the evaporator under anti-gravity or acceleration field, ensuring smooth operation.

[0020] 2. When the device is in a tilted 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 impact of friction on the sleeve and improving the stability of the loop heat pipe during long-term operation.

[0021] 3. The first nozzle and the second nozzle are arranged at one end away from the liquid wick. When in an inclined state, the sprayed cooling medium is located at the upper end of the first liquid storage chamber or the second liquid storage chamber, so that the cooling medium is fully mixed with the cooling medium in the first liquid storage chamber or the second liquid storage chamber before reaching the liquid wick, ensuring a constant cooling temperature of the cooling medium, so that the loop heat pipe can operate smoothly in environments with different gravity directions, and improve the heat dissipation stability of electronic devices; at the same time, the sprayed low-temperature medium in this process can also cool the liquid storage chamber space itself. Then it plays a role in cooling the liquid storage chamber cavity itself and the medium in the liquid storage chamber to prevent temperature fluctuations.

[0022] Furthermore, if the ejected cooling medium contains a small amount of bubbles, they can be directly gathered in the upper cavity of the first liquid storage chamber or the second liquid outlet chamber to prevent the cooling medium containing bubbles from entering the liquid absorption core, thereby preventing the bubbles from entering the capillary core and affecting the normal operation of the evaporator.

[0023] 4. In an inclined working environment, the present application can prevent the addition of working fluid to the liquid storage chamber on the side that is not in use, thereby ensuring a stable distribution of working fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is a cross-sectional view of the sleeve according to the embodiment of the present application.

[0025] Explanation of the reference numerals: 1. evaporator shell; 2. liquid absorption core; 31. first liquid storage chamber; 32. second liquid storage chamber; 4. liquid pipeline; 41. liquid phase tube; 42. guide pipe; 421. support platform; 422. limiting ring; 5. steam channel; 51. fin; 52. steam pipeline; 6. condenser; 71. first nozzle; 72. second nozzle; 73. diverter plate; 731. liquid outlet; 8. sleeve; 81. outer shell; 82. inner shell; 83. end ring; 84. gravity ball. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In the present invention, unless otherwise clearly specified 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 an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] LHP is a widely used high-efficiency heat exchange equipment. If it cannot adapt to various working environments and maintain good working performance, it will increase energy consumption, damage the machine, and cause waste, thus limiting the reliable operation of the machine to a certain extent.

[0031] The inventor found that the liquid storage chamber and the liquid wick of the evaporator component are located on both sides of it. There is always a certain gravity direction in which the working fluid cannot contact the liquid wick, making it difficult to supply liquid to the evaporator, thereby causing the entire loop heat pipe to fail. Although the existing double liquid storage chamber structure can add a direction in which the working fluid contacts the liquid 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 storage chamber and the constant temperature of the working fluid.

[0032] For the former, if the reservoir is filled with incompressible liquid working fluid, the remaining amount is used up, and the excess condensate produced by the condenser cannot flow back to the reservoir, causing the temperature and pressure inside the reservoir to continue to rise, and the working fluid saturation pressure at the evaporator end will increase accordingly, eventually reaching a new balance, and the LHP reaches the heat exchange limit. For the latter, due to the heat leakage problem of traditional loop heat pipes, part of the heat will be directly transferred from the evaporation area to the reservoir, causing the internal working fluid temperature to rise and directly generate steam in a two-phase state. If there is gas-liquid interface movement in the reservoir, it will affect the working fluid reflux and cause system temperature fluctuations.

[0033] To this end, an embodiment of the present application discloses a loop heat pipe structure.

[0034] Reference Figure 1 A loop heat pipe structure includes an evaporator shell 1, a liquid reservoir, a liquid wick 2 and a liquid pipeline 4. The evaporator shell 1 is provided with openings at both ends, and the liquid wick 2 is arranged in the evaporator shell 1. The liquid reservoir includes a first liquid storage chamber 31 and a second liquid storage chamber 32, which are respectively arranged at both ends of the evaporator shell 1, and the first liquid storage chamber 31 and the second liquid storage chamber 32 are respectively connected to the openings at both ends of the evaporator shell 1.

[0035] Reference Figure 1 The liquid pipeline 4 includes a liquid phase tube 41 and a guide tube 42 which are interconnected. The guide tube 42 is sequentially arranged in the first liquid storage chamber 31, the liquid absorption core 2 and the second liquid storage chamber 32. One end of the guide tube 42 located in the second liquid storage chamber 32 is closed to prevent the working fluid in the guide tube 42 from being discharged from the port. In this embodiment, acetone is selected as the working fluid.

[0036] Reference Figure 1 The outer surface of the absorbent core 2 is provided with a steam channel 5, and the steam channel 5 includes a plurality of fins 51 distributed at intervals, and the fins 51 are of a square structure. Optionally, the steam channel 5 is located below the absorbent core 2. The steam channel 5 adopts square fins 51, which has better contact and good heat dissipation effect. The steam channel 5 is located below the liquid wick 2, so that the working medium can contact the steam channel 5 more fully, increase the contact area, and effectively improve the heat dissipation effect.

[0037] The evaporator shell 1 is connected to a steam pipeline 52, one end of the steam pipeline 52 is connected to the steam channel 5, and the other end is connected to the liquid phase pipe 41. A condenser 6 is arranged between the liquid phase pipe 41 and the steam pipeline 52.

[0038] Among them, refer to Figure 1 and Figure 2 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. The guide tube 42 and the sleeve 8 are both cylindrical structures and can be made of stainless steel. The inner wall of the guide sleeve 8 is set to be smooth to reduce friction.

[0039] Reference Figure 1 and Figure 2 A support platform 421 for contacting the inner wall of the sleeve 8 is fixedly provided on the guide tube 42, and two support platforms 421 are arranged at intervals, and 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 truncated cone structure, and the support platform 421 fits the inner wall of the sleeve 8. During the movement of the sleeve 8, it plays a role in guiding the sleeve 8 to ensure the stable operation of the sleeve 8.

[0040] Optionally, two limiting rings 422 are fixedly disposed in the sleeve 8 for contacting with the support platform 421 to limit the position of the sleeve 8. When the limiting rings 422 contact with the support platform 421, the first nozzle 71 or the second nozzle 72 is closed by the sleeve 8. The limiting rings 422 limit the position of the sleeve 8 to prevent the sleeve 8 from sliding excessively.

[0041] Optionally, the sleeve 8 includes 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. The gravity balls 84 can roll in the sleeve 8, and the gravity balls 84 are smooth steel balls.

[0042] When the device is in a tilted state, the gravity ball 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 impact of friction on the sleeve 8 and improving the stability of the loop heat pipe during long-term operation.

[0043] Optional, see Figure 1 and Figure 2 The first nozzle 71 and the second nozzle 72 both include a diverter disk 73. The diverter disk 73 is used to have a side wall that is in contact with the inner wall of the sleeve 8 and is provided with a liquid outlet 731. The liquid outlet 731 is connected to the guide pipe 42. A plurality of liquid outlets 731 are arranged along the circumference of the diverter disk 73 to increase the range of the working fluid spraying and ensure sufficient contact with the working fluid in the first liquid storage chamber 31 or the second liquid storage chamber 32.

[0044] Reference Figure 1 and Figure 2 , the first nozzle 71 and the second nozzle 72 are both arranged away from the liquid absorbent core 2. In this embodiment, the distance between the first nozzle 71 and the second nozzle 72 and the liquid absorbent core 2 is not less than half the length of the first liquid storage chamber 31 or the second liquid storage chamber 32, and the first nozzle 71 and the second nozzle 72 are respectively spaced a certain distance from the top of the first liquid storage chamber 31 or the second liquid storage chamber 32; the length of the first liquid storage chamber 31 and the second liquid storage chamber 32 is the length along the axial direction of the guide tube 42.

[0045] The nozzle is set at a position with a certain distance from both sides between the top of the liquid storage chamber and the surface of the liquid absorbent core 2, so that the low-temperature liquid working medium that has returned to the first liquid storage chamber 31 and the second liquid storage chamber 32 through the cooling cycle can flow down slowly from the top 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 circulated through the condenser is sprayed out through the nozzle (the first nozzle 71 and the second nozzle 72), it flows slowly from top to bottom, that is, it flows in the direction close to the liquid absorbent core 2 after spraying, 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. It then plays a role in cooling the liquid storage chamber cavity itself and the working medium in the liquid storage chamber to prevent temperature fluctuations.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] This device does not require external energy to drive, and uses the structural design of the working medium pipeline plus the sleeve 8 to move the working medium to the two ends of the liquid wick 2, so that the working medium can be in good contact with the liquid wick 2 under various placement conditions, thereby soaking the liquid wick 2. Compared with the existing loop heat pipe evaporator, it cleverly solves the problem that in certain placement conditions, the liquid wick 2 cannot be soaked in time and "burns dry", resulting in poor heat dissipation of some parts of the machine and increased energy consumption. This design allows 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.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present 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); 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).

2. A loop heat pipe structure according to claim 1, characterized in that: A support platform (421) for contacting the inner wall of the sleeve (8) is fixedly arranged on the guide tube (42), and two support platforms (421) are arranged at intervals.

3. A loop heat pipe structure according to claim 2, characterized in that: 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).

4. A loop heat pipe structure according to claim 1, characterized in that: 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).

5. The 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).

6. The 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).

7. The 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).

8. A loop heat pipe structure according to claim 7, characterized in that: The steam channel (5) is located below the liquid absorbent core (2).

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