Active balance type gravity assisted heat pipe

Abstract

The utility model belongs to the technical field of heat dissipation and cooling, and particularly relates to an active balance type gravity assisted heat pipe, which comprises a condenser, an evaporator and a plurality of liquid storage tanks, the condenser is respectively connected with inlets of the plurality of liquid storage tanks through a first liquid downcomer, outlets of the plurality of liquid storage tanks are respectively connected with the evaporator through a second liquid downcomer, and the second liquid downcomer is connected with the evaporator. The evaporator is connected with the condenser through a gas ascending pipe, the gas ascending pipe is connected with the liquid storage tanks through bypass pipelines, and when the temperature difference T between the user heat dissipation end temperature T and the environment temperature T is smaller than or equal to the threshold value T, different liquid storage tanks are alternately used for liquid storage and liquid supply. The liquid storage tank for liquid supply is communicated with the evaporator and the gas ascending pipe, and the liquid storage tank for liquid storage is communicated with the condenser; according to the active balance type gravity assisted heat pipe, the gravity assisted heat pipe can be started smoothly when the indoor and outdoor temperature difference is small; and meanwhile, liquid supply and refrigeration working medium circulation can be promoted, and the heat exchange / heat dissipation effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat dissipation and cooling, and particularly relates to an active balance type gravity heat pipe. Background Technique

[0002] The gravity type separated heat pipe, abbreviated as gravity heat pipe, loop heat pipe or thermosyphon, discharges heat from indoors to outdoors through the natural phase change flow of the refrigeration working medium, and realizes the gas-liquid cycle in the pipeline through the pressure difference and gravity reflux. Therefore, it does not require external power, and its operating energy consumption is lower than that of mechanical refrigeration systems. Generally, the gravity type separated heat pipe mainly consists of an evaporator, a condenser, a gas riser (gas pipe) and a liquid downcomer (liquid pipe) connecting the two sections. In the gravity heat pipe, pipelines for the rise of the refrigeration working medium gas and the reflux of the condensed liquid are respectively formed, and the rising gas and the reflux liquid flow simultaneously without interference. After absorbing heat in the evaporator, the liquid working medium becomes saturated or superheated gas, and the pressure increases. It reaches the condenser through the gas riser. After the gaseous working medium releases heat in the condenser, it becomes a liquid working medium. Under the action of gravity, the liquid working medium returns to the evaporator along the liquid downcomer, and circulates in this way to achieve continuous heat transfer. Therefore, the position of the condenser of the gravity type separated heat pipe must be higher than that of the evaporator to ensure that the condensed liquid can flow back to the evaporator by gravity. In addition, in order to overcome the flow resistance of the gas and liquid in the pipeline, a certain liquid level difference will be formed between the liquid downcomer and the liquid level of the evaporator, such as Figure 1 the height of the liquid column shown, and this liquid level difference is the minimum height of the evaporator and the condenser to ensure the normal operation of the gravity type separated heat pipe.

[0003] During the actual operation process, the height difference between the condenser and the evaporator has a direct impact on the system performance. When the refrigerant charge and the indoor-outdoor temperature difference are controlled appropriately, when the height difference of the heat exchanger is small, the system circulation driving force is small, the refrigerant liquid return is not smooth, the superheat at the evaporator outlet and the subcooling at the condenser outlet are both large, the two-phase area is small, and the heat transfer performance is poor. As the height difference of the heat exchanger gradually increases, the height of the liquid column in the liquid pipe providing the circulation power gradually increases, the refrigerant liquid return is smooth, the superheat at the evaporator outlet and the subcooling at the condenser outlet gradually decrease, the two-phase area increases, and the heat transfer performance is enhanced. However, as the height difference of the heat exchanger further increases, the height of the liquid column in the liquid pipe begins to be lower than the height difference of the heat exchanger, and the "flow interruption" phenomenon gradually appears in the downcomer, so that the circulation flow rate and the heat transfer performance will not continue to increase, that is, the performance of the gravity type separated heat pipe will not continue to increase with the increase of the height difference of the heat exchanger, especially in the case of small circulation resistance. Therefore, the driving force of the gravity heat pipe circulation is proportional to the height of the liquid column in the liquid pipe rather than the height difference of the heat exchanger, and the height difference of the heat exchanger is only the upper limit value of the height of the liquid column in the liquid pipe.

[0004] For a gravity - type separated heat pipe with a constant indoor temperature, a decrease in the outdoor temperature means an increase in the indoor - outdoor temperature difference. Specifically, the influence of the indoor - outdoor temperature difference on the system performance is as Figure 2 shown. From Figure 2 it can be obtained that: when the refrigerant charge and the height difference of the heat exchanger are appropriate, the heat transfer capacity of the gravity - type separated heat pipe increases basically linearly with the increase of the indoor - outdoor temperature difference. However, as the indoor - outdoor temperature difference further increases, the growth rate of the heat transfer capacity slows down, which is related to the gradual decrease of the liquid refrigerant amount in the evaporator, the increase of the condenser liquid level, the increase of the superheat degree and the sub - cooling degree. In actual use, it should be particularly noted that: when the indoor - outdoor temperature difference is very small, the superheat degree at the outlet of the evaporator of the gravity - type separated heat pipe system is very small, and almost all is liquid or two - phase refrigerant. At the same time, there is almost no sub - cooling degree of the refrigerant inside the condenser, and the heat transfer performance on the evaporation side is poor. At this time, the gravity - type separated heat pipe system can hardly start. How to alleviate the problem that it is difficult to start the gravity - type separated heat pipe system when the indoor - outdoor temperature difference is very small is one of the difficult problems puzzling the technicians in this field.

[0005] In addition, in the prior art, for a gravity - type separated heat pipe system, when it needs to be combined with a vapor compression refrigeration system, a liquid receiver is considered to be added behind the condenser, as Figure 3 shown. At this time, when the refrigerant charge, the height difference of the heat exchanger, and the indoor - outdoor temperature difference are appropriate, when the position of the liquid receiver is very low, the performance of the gravity - type separated heat pipe is very poor. This is because when the position of the liquid receiver is very low, the liquid column height of the corresponding liquid pipe is very low, resulting in insufficient circulation driving force and poor liquid return, and the superheat degree of the evaporator increases. When the position of the liquid receiver is relatively high, the performance of the gravity - type separated heat pipe cycle is better. However, adding a liquid receiver to the system will increase the liquid column height of the liquid pipe, making the evaporation temperature higher and increasing the starting difficulty of the gravity - type separated heat pipe with a small temperature difference. Because after adding the liquid receiver, the self - adaptive adjustment function of the liquid column of the liquid pipe is damaged. At this time, if the installation position of the liquid receiver is too high and the indoor - outdoor temperature difference is small, the liquid column height is too large and it is not easy to start; if the installation position of the liquid receiver is too low and the indoor - outdoor temperature difference is large, the liquid column height is too low and the driving force is insufficient, and the performance is limited.

[0006] Under this background, solving the problem that it is difficult to start the gravity - type separated heat pipe with a small temperature difference is one of the technical problems that need to be urgently solved by the technicians in this field. Summary of the Invention

[0007] The purpose of the present invention is to provide an active - balanced gravity heat pipe for the above - mentioned existing technical problems, so as to achieve the smooth start - up and efficient heat dissipation of the gravity - type separated heat pipe with a small temperature difference.

[0008] In view of this, the present invention provides an active - balanced gravity heat pipe, including:

[0009] A condenser, an evaporator and a plurality of liquid storage tanks, wherein the installation height of the condenser is higher than that of the evaporator, and the installation heights of the plurality of liquid storage tanks are between those of the condenser and the evaporator;

[0010] Among them, the refrigerant outlet on the condenser is respectively connected to the inlets of the plurality of liquid storage tanks through a first liquid downcomer, the outlets of the plurality of liquid storage tanks are respectively connected to the refrigerant inlet on the evaporator through a second liquid downcomer, the refrigerant outlet on the evaporator is connected to the refrigerant inlet on the condenser through a gas riser, and the gas riser is respectively connected to the plurality of liquid storage tanks through a bypass pipeline;

[0011] When the temperature difference △T between the temperature T of the user's heat dissipation end 散热端 and the ambient temperature T 环境 is less than or equal to T 阈值 , different liquid storage tanks are alternately used for liquid storage and liquid supply. At this time, the liquid storage tank for liquid supply is communicated with the evaporator and the gas riser, and the liquid storage tank for liquid storage is communicated with the condenser.

[0012] Further, the number of the liquid storage tanks is two, namely a first liquid storage tank and a second liquid storage tank, and the first liquid storage tank and the second liquid storage tank are connected in parallel between the first liquid downcomer and the second liquid downcomer.

[0013] Further, the installation heights of the first liquid storage tank and the second liquid storage tank are the same.

[0014] Further, in the initial state, the liquid level height of the first liquid storage tank is higher, the liquid level height of the second liquid storage tank is lower, and the liquid column height between the first liquid storage tank and the evaporator is higher than the minimum liquid column height required for the start of the active balanced gravity heat pipe.

[0015] Further, the gas riser is connected to the first liquid storage tank through a first balance pipe; the gas riser is connected to the second liquid storage tank through a second balance pipe.

[0016] Further, an inlet valve one is arranged at the inlet of the first liquid storage tank, and an outlet valve one is arranged at the outlet; an inlet valve two is arranged at the inlet of the second liquid storage tank, and an outlet valve two is arranged at the outlet.

[0017] Further, the first balance pipe is connected to the inlet of the first liquid storage tank, and the connection point is between the inlet valve one and the first liquid storage tank; the second balance pipe is connected to the inlet of the second liquid storage tank, and the connection point is between the inlet valve two and the second liquid storage tank.

[0018] Further, a first balance valve is arranged on the first balance pipe; a second balance valve is arranged on the second balance pipe.

[0019] The active balance gravity heat pipe described in the present utility model is provided with two liquid storage tanks, and during use, the two liquid storage tanks are alternately used for liquid storage and liquid supply respectively, always keeping the liquid level in the liquid storage tank for liquid supply relatively high, which can provide sufficient driving force for the start-up of the gravity heat pipe and realize the smooth start-up of the gravity heat pipe when the indoor-outdoor temperature difference is small. At the same time, the air pressure balance between the liquid storage tank and the evaporator during liquid supply is realized through two balance pipes connected between the gas riser and the first liquid downcomer, which promotes the liquid supply and the circulation of the refrigerant, and improves the heat exchange / heat dissipation effect. In addition, the active balance gravity heat pipe described in this application can be simply modified by adding a liquid storage tank and balance pipes on the basis of the existing gravity heat pipe, and has the advantages of low cost, simple structure and easy implementation. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a traditional gravity heat pipe;

[0021] Figure 2 is the influence of the indoor-outdoor temperature difference on the performance of the gravity separation heat pipe;

[0022] Figure 3 is a schematic structural diagram of an existing gravity heat pipe with a liquid storage tank;

[0023] Figure 4 is a schematic structural diagram of the active balance gravity heat pipe described in the present utility model;

[0024] The labels in the figure are shown as:

[0025] 1. Condenser; 2. First liquid downcomer; 3. Second liquid downcomer; 4. Evaporator; 5. Gas riser; 6. Liquid storage tank; 6a. First liquid storage tank; 6b. Second liquid storage tank; 7. First balance pipe; 701. First balance valve; 8. Second balance pipe; 801. Second balance valve; 9. Control valve; 901. First inlet valve; 902. First outlet valve; 903. Second inlet valve; 904. Second outlet valve. Detailed Description of the Preferred Embodiment

[0026] Next, the technical solutions in the embodiments of the present application will be clearly described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0027] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. For the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0028] It should be noted that the terms "one", "two", etc. in the description and claims of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "one", "two", etc. are generally of the same category and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0029] It should be noted that in the description of the present application, the orientation or positional relationships indicated by the orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary instructions, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0030] It should be noted that in this application, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0031] As Figure 4 shown, an active balance gravity heat pipe includes:

[0032] A condenser 1, an evaporator 4, and a plurality of liquid storage tanks 6. The installation height of the condenser 1 is higher than that of the evaporator 4, and the installation height of the plurality of liquid storage tanks 6 is between the condenser 1 and the evaporator 4;

[0033] Wherein, the refrigerant outlet on the condenser 1 is respectively connected to the inlets of the plurality of liquid storage tanks 6 through a first liquid downcomer 2, the outlets of the plurality of liquid storage tanks 6 are respectively connected to the refrigerant inlet on the evaporator 4 through a second liquid downcomer 3, the refrigerant outlet on the evaporator 4 is connected to the refrigerant inlet on the condenser 1 through a gas riser 5, and the gas riser 5 is respectively connected to the plurality of liquid storage tanks 6 through a bypass pipeline.

[0034] Preferably, the number of the liquid storage tanks 6 is two, namely a first liquid storage tank 6a and a second liquid storage tank 6b, and the first liquid storage tank 6a and the second liquid storage tank 6b are connected in parallel between the first liquid downcomer 2 and the second liquid downcomer 3.

[0035] More preferably, the installation heights of the first liquid storage tank 6a and the second liquid storage tank 6b are the same.

[0036] Further, in the initial state, the liquid levels in the first liquid storage tank 6a and the second liquid storage tank 6b in the active balance gravity heat pipe are not equal. The liquid level of one of the liquid storage tanks 6, such as the first liquid storage tank 6a, is higher, and the liquid level of the other liquid storage tank 6, such as the second liquid storage tank 6b, is lower.

[0037] Preferably, in the initial state, the liquid column height between the first liquid storage tank 6a and the evaporator 4 is higher than the minimum liquid column height required for the start-up of the active balanced gravity heat pipe.

[0038] Further, the gas riser 5 is connected to the first liquid storage tank 6a through the first balance pipe 7; the gas riser 5 is connected to the second liquid storage tank 6b through the second balance pipe 8.

[0039] Further, control valves 9 are respectively arranged at the inlet and outlet of the liquid storage tank 6, and the opening and closing states of the inlet and outlet of the liquid storage tank 6 are controlled through the control valves 9.

[0040] Specifically, an inlet valve 901 is arranged at the inlet of the first liquid storage tank 6a, and an outlet valve 902 is arranged at the outlet; similarly, an inlet valve 903 is arranged at the inlet of the second liquid storage tank 6b, and an outlet valve 904 is arranged at the outlet.

[0041] Preferably, the first balance pipe 7 is connected to the inlet of the first liquid storage tank 6a, and the connection point is located between the inlet valve 901 and the first liquid storage tank 6a; the second balance pipe 8 is connected to the inlet of the second liquid storage tank 6b, and the connection point is located between the inlet valve 903 and the second liquid storage tank 6b.

[0042] Furthermore, a first balance valve 701 is arranged on the first balance pipe 7; similarly, a second balance valve 801 is arranged on the second balance pipe 8, and the on-off of the first balance pipe 7 and the second balance pipe 8 is controlled through the first balance valve 701 and the second balance valve 801. When the first balance valve 701 and the second balance valve 801 are in the open state, the first balance pipe 7 and the second balance pipe 8 can transport part of the gaseous refrigerant in the gas riser 5 into the first liquid storage tank 6a or the second liquid storage tank 6b.

[0043] Further, the usage method of the active balanced gravity heat pipe includes the steps:

[0044] S1, before the active balanced gravity heat pipe starts up, detect the ambient temperature T 环境 and the temperature T 散热端 of the user's heat dissipation end, and then calculate the temperature difference △T between the ambient temperature and the user's heat dissipation end through calculation. Among them, △T = T 散热端 -T 环境；

[0045] S2, compare △T obtained in step S1 with the preset threshold T 阈值 If △T > T 阈值 , it is considered that the ambient temperature T 环境 and the temperature T 散热端When the temperature difference is appropriate, the gravity heat pipe can start normally, and the active balance type gravity heat pipe enters the normal start mode described in step S3; if △T ≤ T 阈值 , it is considered that the temperature difference between the ambient temperature T 环境 and the user heat dissipation end temperature T 散热端 is relatively small, the gravity heat pipe has difficulty starting, and the active balance type gravity heat pipe enters the active balance start mode described in step S4;

[0046] S3. In the normal start mode, only one liquid storage tank 6 participates in the cycle, and liquid supply and liquid storage are carried out through one liquid storage tank 6. Taking the first liquid storage tank 6a as an example, its cycle heat dissipation process is described in detail:

[0047] First, the first inlet valve 901 and the first outlet valve 902 are opened, and the other valves are closed. The gravity heat pipe system operates normally. At this time, the effective components in the system are the evaporator 4, the condenser 1, and the first liquid storage tank 6a. The refrigerant in the gravity heat pipe enters the inlet of the condenser 1 in a gaseous state ( Figure 4 the left side in Figure 4 ). The condensed liquid refrigerant flows out from the outlet of the condenser 1 ( Figure 4 the right side in Figure 4 ), flows through the first liquid downcomer 2 and the first inlet valve 901 into the first liquid storage tank 6a, and then flows out from the outlet of the first liquid storage tank 6a through the first outlet valve 902. After that, it enters the inlet of the evaporator 4 ( Figure 4 the right side in

[0048] S4. In the active balance start mode, both liquid storage tanks 6 participate in the cycle. The liquid storage tank 6 with a higher liquid level supplies liquid to the evaporator 4, and the other liquid storage tank 6 with a lower liquid level stores the liquid refrigerant from the condenser 1. Taking the first liquid storage tank 6a with a higher liquid level and the second liquid storage tank 6b with a lower liquid level as an example, its cycle heat dissipation process is described in detail:

[0049] In the initial state, the liquid level of liquid storage tank 6a is relatively high, and the liquid level of liquid storage tank 6b is relatively low. The first balance valve 701 is open, the second balance valve 801 is closed, the inlet valve 901 is closed, the outlet valve 902 is open, the inlet valve 903 is open, and the outlet valve 904 is closed. At this time, the air pressures of liquid storage tank 6a and the evaporator 4 are balanced, and the air pressures of liquid storage tank 6b and the condenser 1 are balanced. The refrigerant starts from the outlet of the evaporator 4 and, in gaseous form, part of it enters the condenser 1 for condensation and then enters liquid storage tank 6b in liquid form to achieve liquid storage. Another part enters liquid storage tank 6a through the first balance valve 701 to balance the air pressures of liquid storage tank 6a and the evaporator 4. At the same time, the liquid refrigerant in liquid storage tank 6a enters the evaporator 4 under the action of gravity for evaporation, thus achieving heat dissipation. When the amount of liquid refrigerant in liquid storage tank 6a is small, the functions of liquid storage tank 6a and liquid storage tank 6b are exchanged by switching valves. At this time, the first balance valve 701 is closed, the second balance valve 801 is open, the inlet valve 901 is open, the outlet valve 902 is closed, the inlet valve 903 is closed, and the outlet valve 904 is open. At this time, the air pressures of liquid storage tank 6b and the evaporator 4 are balanced, and the air pressures of liquid storage tank 6a and the condenser 1 are balanced. Liquid storage is achieved through liquid storage tank 6a, and liquid supply is achieved through liquid storage tank 6b. Such cyclic exchange is carried out to complete the cycle.

[0050] Preferably, in the step S1, the temperature of the condenser 1 can be measured and used as the ambient temperature T 环境 ; the temperature of the evaporator 4 is measured and used as the user heat dissipation end temperature T 散热端 .

[0051] Preferably, in the step S4, 60-90% of the gaseous refrigerant discharged from the outlet of the evaporator 4 can be passed into the condenser 1 for condensation, and the remaining gaseous refrigerant enters the liquid storage tank 6 for liquid storage to balance its air pressure with that of the evaporator 4.

[0052] Furthermore, during use, the liquid levels in liquid storage tank 6a and liquid storage tank 6b can be detected respectively by a load cell or a liquid level gauge, and the functions of liquid storage tank 6a and liquid storage tank 6b are automatically exchanged according to the detection results.

[0053] The active balance gravity heat pipe described in the present utility model is provided with two liquid storage tanks, and during use, the two liquid storage tanks are alternately used for liquid storage and liquid supply respectively, always keeping the liquid level in the liquid storage tank for liquid supply relatively high, which can provide sufficient driving force for the start-up of the gravity heat pipe and realize the smooth start-up of the gravity heat pipe. At the same time, the air pressure balance between the liquid storage tank and the evaporator during liquid supply is realized through two balance pipes connected between the gas riser and the first liquid downcomer, which promotes liquid supply and the circulation of the refrigeration working medium and improves the heat exchange / heat dissipation effect. In addition, the active balance gravity heat pipe and its use method described in the present application can be simply modified by adding a liquid storage tank and balance pipes on the basis of the existing gravity heat pipe, and have the advantages of low cost, simple structure and easy implementation.

[0054] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. An active balanced gravity heat pipe, characterized in that: include: A condenser (1), an evaporator (4) and a plurality of liquid storage tanks (6), wherein the installation height of the condenser (1) is higher than that of the evaporator (4), and the installation height of the plurality of liquid storage tanks (6) is located between the condenser (1) and the evaporator (4); The refrigerant outlet on the condenser (1) is connected to the inlets of the plurality of liquid storage tanks (6) through the first liquid downcomer (2), the outlets of the plurality of liquid storage tanks (6) are connected to the refrigerant inlet on the evaporator (4) through the second liquid downcomer (3), the refrigerant outlet on the evaporator (4) is connected to the refrigerant inlet on the condenser (1) through the gas upcomer (5), and the gas upcomer (5) is connected to the plurality of liquid storage tanks (6) through bypass pipelines; When the user heat sink temperature T 散热端 and ambient temperature T 环境 The temperature difference between △T≤T 阈值 When the liquid is stored and supplied, different liquid storage tanks (6) are used alternately. At this time, the liquid supply storage tank (6) is connected to the evaporator (4) and the gas riser (5), and the liquid storage tank (6) is connected to the condenser (1).

2. The active balanced gravity heat pipe according to claim 1, characterized in that: There are two liquid storage tanks (6), namely liquid storage tank one (6a) and liquid storage tank two (6b). Liquid storage tank one (6a) and liquid storage tank two (6b) are connected in parallel between the first liquid downcomer (2) and the second liquid downcomer (3).

3. The active balanced gravity heat pipe according to claim 2, characterized in that: The installation heights of the liquid storage tank 1 (6a) and the liquid storage tank 2 (6b) are consistent.

4. The active balanced gravity heat pipe according to claim 2 or 3, characterized in that: In the initial state, the liquid level height of the liquid storage tank 1 (6a) is higher, the liquid level height of the liquid storage tank 2 (6b) is lower, and the liquid column height between the liquid storage tank 1 (6a) and the evaporator (4) is higher than the minimum liquid column height required for starting the active balanced gravity heat pipe.

5. The active balanced gravity heat pipe according to claim 2, characterized in that: The gas riser (5) is connected to the first liquid storage tank (6a) via a first balance pipe (7); the gas riser (5) is connected to the second liquid storage tank (6b) via a second balance pipe (8).

6. The active balanced gravity heat pipe according to claim 5, characterized in that: An inlet valve 1 (901) is provided at the inlet of the first liquid storage tank (6a), and an outlet valve 1 (902) is provided at the outlet; an inlet valve 2 (903) is provided at the inlet of the second liquid storage tank (6b), and an outlet valve 2 (904) is provided at the outlet.

7. The active balanced gravity heat pipe according to claim 6, characterized in that: The first balancing pipe (7) is connected to the inlet of the liquid storage tank one (6a), and the connection point is located between the inlet valve one (901) and the liquid storage tank one (6a); the second balancing pipe (8) is connected to the inlet of the liquid storage tank two (6b), and the connection point is located between the inlet valve two (903) and the liquid storage tank two (6b).

8. The active balanced gravity heat pipe according to claim 5, characterized in that: A first balancing valve (701) is arranged on the first balancing pipe (7); and a second balancing valve (801) is arranged on the second balancing pipe (8).

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