Reservoir pressure regulating device and method

Abstract

This invention provides a liquid reservoir pressure regulating device and method, relating to the field of pump-driven two-phase flow thermal control technology. The liquid reservoir pressure regulating device includes: a liquid reservoir; a capillary wick assembly disposed on the inner wall of the liquid reservoir; the capillary wick assembly includes: a liquid storage capillary wick, a liquid absorption capillary wick, and a liquid discharge capillary wick; a cooling plate installed on the outer wall of the liquid reservoir opposite to the liquid discharge capillary wick, used to promote vapor condensation in the liquid discharge capillary wick; and a heating plate installed on the outer wall of the liquid reservoir opposite to the liquid absorption capillary wick, used to promote the evaporation of coolant within the liquid absorption capillary wick; the pore size of the liquid discharge capillary wick is larger than that of the liquid storage capillary wick; and the pore size of the liquid storage capillary wick is greater than or equal to that of the liquid absorption capillary wick. The liquid reservoir pressure regulating device provided by this invention has a large pressure regulating range, requires no mechanical parts for adjustment, has high reliability, a simple structure, and reduces the difficulty of system sealing and the possibility of leakage.

Description

Technical Field

[0001] This invention relates to the field of pump-driven two-phase flow thermal control technology, and in particular to a liquid reservoir pressure regulating device and method. Background Technology

[0002] With the rapid development of aerospace technology, airborne electronic equipment is becoming increasingly miniaturized and highly integrated, leading to an exponential increase in heat load per unit area. Efficient heat dissipation technology has become a bottleneck for its further development. Pump-driven two-phase loop systems, as a highly efficient two-phase heat transfer technology, are characterized by their compact structure and light weight, offering significant advantages in the thermal control of space electronic equipment. During operation, this system adjusts the pressure within the liquid receiver, thereby regulating the phase change temperature of the heat exchanger and ultimately controlling the temperature of the electronic equipment.

[0003] Early liquid receivers in pump-driven two-phase loop systems employed gas-filled pressure regulation, requiring moving valves and a gas cylinder, resulting in poor reliability and compactness. To address this, thermally controlled liquid receivers have been developed in recent years. These use electric heating to evaporate the liquid within the receiver, increasing system pressure. Heat exchange between the cryogenic fluid in the pump-driven two-phase loop system and the heat exchanger condenses the vapor in the receiver, reducing system pressure and achieving pressure regulation. However, cryogenic fluid cooling requires valves to adjust the cooling flow rate and thus the cooling capacity, introducing moving parts and reducing reliability. Furthermore, its temperature control range is limited, and the coupling of multiple control processes increases system complexity. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention provides a liquid reservoir pressure regulating device and method.

[0005] According to one aspect of the present invention, a liquid reservoir pressure regulating device is provided, comprising: a liquid reservoir connected to a main coolant pipeline for containing coolant and steam; a capillary wick assembly disposed on the inner wall of the liquid reservoir for containing and confining coolant; the capillary wick assembly comprising: a liquid reservoir capillary wick in contact with the surface of the coolant; a liquid suction capillary wick connected to the upper surface of the liquid reservoir capillary wick; a liquid discharge capillary wick connected to the upper surface of the liquid suction capillary wick; a cooling plate mounted on the outer wall of the liquid reservoir opposite to the liquid discharge capillary wick for promoting steam condensation in the liquid discharge capillary wick; and a heating plate mounted on the outer wall of the liquid reservoir opposite to the liquid suction capillary wick for promoting coolant evaporation within the liquid suction capillary wick; the pore size of the liquid reservoir capillary wick is greater than or equal to that of the liquid suction capillary wick, so that the liquid suction capillary wick can draw liquid from the liquid reservoir capillary wick; the pore size of the liquid discharge capillary wick is greater than that of the liquid reservoir capillary wick, so that the liquid discharge capillary wick can discharge liquid to the liquid reservoir capillary wick through the liquid suction capillary wick.

[0006] According to an embodiment of the present invention, the liquid storage capillary includes a first capillary; the first capillary has a sheet-like structure, with its edge connected to the inner wall of the liquid storage tank, and its lower surface in contact with the liquid surface of the coolant; the pore size of the first capillary is greater than or equal to that of the liquid absorption capillary.

[0007] According to an embodiment of the present invention, the liquid storage capillary also includes a second capillary; the second capillary has a columnar structure, with its bottom surface connected to the upper surface of the first capillary, and its sides not in contact with the liquid absorption capillary and the liquid discharge capillary; the pore size of the second capillary is larger than that of the first capillary.

[0008] According to an embodiment of the present invention, the pore size of the drain capillary is larger than that of the second capillary.

[0009] According to an embodiment of the present invention, the liquid absorption capillary and the liquid discharge capillary are cylindrical structures, and the outer walls of the liquid absorption capillary and the liquid discharge capillary are connected to the inner wall of the liquid storage tank.

[0010] According to an embodiment of the present invention, the side of the cooling chip away from the liquid storage tank is connected to a branch pipe of the coolant to reduce the temperature generated when the cooling chip is working.

[0011] According to an embodiment of the present invention, it further includes: a pressure gauge for monitoring the pressure signal of the main coolant pipeline; and a controller for controlling the operation of the cooling or heating elements based on the pressure signal.

[0012] According to another aspect of the present invention, a method for regulating the pressure of a liquid reservoir is also provided, comprising: controlling a heating element or a cooling element to operate according to a control signal; when the heating element is operating, evaporating stored coolant from a suction capillary and drawing liquid from the storage capillary to replenish coolant; the storage capillary discharging liquid into the main coolant pipeline as the pressure increases; when the cooling element is operating, absorbing liquid condensed from vapor inside the discharge capillary and discharging it into the storage capillary via the suction capillary; and the storage capillary storing coolant discharged into a storage tank from the main coolant pipeline as the pressure decreases.

[0013] According to an embodiment of the present invention, before controlling the heating element or cooling element to operate according to the control signal, the method further includes: evacuating the liquid storage tank; filling the liquid storage tank with coolant, wherein the coolant level is in contact with the first capillary of the liquid storage capillary.

[0014] According to an embodiment of the present invention, controlling the operation of the heating element or the cooling element based on the control signal includes: acquiring a pressure signal of the main coolant pipeline; controlling the cooling element to operate when the pressure signal of the main coolant pipeline is greater than a target value; and controlling the heating element to operate when the pressure signal of the main coolant pipeline is less than the target value. Attached Figure Description

[0015] The above-described features, other objects, and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings, in which:

[0016] Figure 1 This is a schematic diagram of the structure of a liquid reservoir pressure regulating device according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the operation of the reservoir pressure regulating device in the pressurization state according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the operation of the reservoir pressure regulating device under reduced pressure according to an embodiment of the present invention. Detailed Implementation

[0019] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0020] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0021] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0022] When using expressions such as "at least one of A, B, and C", they should generally be interpreted in accordance with the meaning that is commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B, and C, etc.).

[0023] In the technical solution of this invention, the collection, storage, use, processing, transmission, provision, disclosure and application of data (including but not limited to user personal information) all comply with the provisions of relevant laws and regulations, necessary confidentiality measures have been taken, and they do not violate public order and good morals.

[0024] In the technical solution of this invention, the authorization or consent of the data owner is obtained before acquiring or collecting relevant data.

[0025] This invention provides a liquid reservoir pressure regulating device, including a liquid reservoir 1, a capillary wick assembly 2, a cooling plate 3, and a heating plate 4. The liquid reservoir 1 is connected to a main coolant pipe 5 and is used to contain coolant and steam. The capillary wick assembly 2 is disposed on the inner wall of the liquid reservoir 1 and is used to contain and confine the coolant. The capillary wick assembly 2 includes a liquid storage capillary, a liquid absorption capillary 23, and a liquid discharge capillary 24. The liquid storage capillary is in contact with the surface of the coolant, the liquid absorption capillary 23 is connected to the upper surface of the liquid storage capillary, and the liquid discharge capillary 24 is connected to the upper surface of the liquid absorption capillary 23. The cooling plate 3 is installed on the outer wall of the liquid reservoir 1, opposite to the liquid discharge capillary 24, to promote steam condensation in the liquid discharge capillary 24, thereby reducing pressure. The heating plate 4 is installed on the outer wall of the liquid reservoir 1, opposite to the liquid absorption capillary 23, to promote the evaporation of coolant within the liquid absorption capillary 23, thereby increasing pressure. The pore size of the drain capillary 24 is larger than that of the storage capillary, so that the drain capillary 24 can drain liquid to the storage capillary through the suction capillary 23; the pore size of the storage capillary is greater than or equal to that of the suction capillary 23, so that the suction capillary 23 can absorb liquid from the storage capillary.

[0026] Figure 1 This is a schematic diagram of the structure of a liquid reservoir pressure regulating device according to an embodiment of the present invention. Figure 1 As shown, the storage tank 1 includes a storage head 11, a main tank body 12, and a sealing head 13. The storage head 11 and the sealing head 13 can be connected to the main tank body 12 by welding or flange bolts to form a complete tank body. The storage head 11 is connected to the main coolant pipeline 5, and coolant is poured into the storage tank 1 through the connection port.

[0027] The inner wall of the main tank 12 is sintered or machined with capillary wicks 2 to constrain fluid flow under microgravity through capillary force. Drainage capillary wicks 24, absorption capillary wicks 23, and storage capillary wicks are arranged sequentially from high to low on the inner wall of the main tank 12. According to an embodiment of the present invention, the storage capillary wick can be located at the bottom of the inner wall of the main tank 12, i.e., at the connection point with the storage cap 11.

[0028] In this configuration, the pore size of the drain capillary 24 is larger than that of the storage capillary 24. Therefore, the partially filled storage capillary 24 has greater capillary force, allowing it to absorb liquid from the drain capillary 24 via the absorbing capillary 23. Similarly, if the pore size of the storage capillary 24 is larger than that of the absorbing capillary 23, the absorbing capillary 23 has greater capillary force, enabling it to absorb liquid from the storage capillary and replenish evaporated liquid promptly. Alternatively, if the pore sizes and capillary forces of the storage capillary 24 and absorbing capillary 23 are equal, and the absorbing capillary 23 is connected above the storage capillary 24, excess coolant will be drawn into the absorbing capillary 23 once the bottom structure of the storage capillary 24 is filled.

[0029] According to an embodiment of the present invention, the cooling element 3 can be a thermoelectric cooling element, disposed on the outer wall of the main tank 12 opposite to the drain capillary wick 24. The heating element 4 is an electric heating element, disposed on the outer wall of the main tank 12 opposite to the absorbent capillary wick 23.

[0030] It should be noted that, according to the liquid reservoir pressure regulating device provided in the embodiment of the present invention, before operation, its initial state is set. First, the liquid reservoir 1 is evacuated, and then coolant is added. The coolant fills the liquid reservoir head 11 and contacts the lower surface of the liquid reservoir capillary. Under the action of capillary force, excess coolant first fills the bottom structure of the liquid reservoir capillary and then flows into the suction capillary 23. The amount of coolant added is controlled to not exceed the upper surface of the liquid reservoir capillary and to prevent it from being squeezed into the discharge capillary 24. The liquid reservoir 1 is also filled with coolant vapor.

[0031] When pressurization is required in the storage tank 1, the heating element 4 is activated. The heating element 4 is positioned close to the wick 23, and the heat generated is transferred through the tank wall of the main tank 12 to the wick 23. The coolant stored in the wick 23 evaporates, causing the pressure in the storage tank 1 to rise. On one hand, under high pressure, the coolant stored in the wick 23 is discharged into the main coolant pipe 5, replenishing the pump-driven two-phase circuit system. On the other hand, if the pore size of the main body of the wick 23 is larger than that of the wick 23, the coolant stored in the main body of the wick 23 is drawn into the wick 23 under the influence of capillary force. Therefore, after the coolant in the wick 23 evaporates, liquid can be replenished from the wick 23 in a timely manner, achieving a larger pressurization buffer range.

[0032] When pressure reduction is required in the storage tank 1, the cooling element 3 is activated. The cooling element 3 moves close to the drain capillary wick 24, thereby lowering the temperature of the drain capillary wick 24 through the tank wall of the main tank 12. This causes the vapor in the main tank 12 to condense in the drain capillary wick 24, resulting in a pressure drop in the storage tank 1. On one hand, under the low pressure, the main coolant pipe 5 injects condensate into the storage tank 1, and the added condensate is stored in the storage capillary wick. On the other hand, the coolant condensed in the drain capillary wick 24, under the action of capillary force difference, is discharged into the main body of the storage capillary wick through the suction capillary wick 23, maintaining the dryness of the drain capillary wick 24. Therefore, the vapor condensation process at the drain capillary wick 24 can be sustained for a longer period, achieving a larger pressure reduction buffer range.

[0033] The liquid reservoir pressure regulating device provided in this embodiment of the invention controls the phase change of the coolant fluid in the liquid reservoir 1 by heating or cooling to adjust the pressure of the liquid reservoir 1, thus achieving rapid pressure regulation. The capillary force difference formed by the capillary wick assembly 2 stores and allows the coolant to flow within the capillary wick assembly 2, providing a greater buffer margin for the phase change process. This results in a wider pressure regulation range, eliminates the need for mechanical parts for adjustment, ensures high reliability, simplifies the structure, and reduces the difficulty of system sealing and the possibility of leakage.

[0034] According to an embodiment of the present invention, the liquid storage capillary wick includes at least a first capillary wick 21. The first capillary wick 21 has a sheet-like structure, with its edge connected to the inner wall of the liquid storage tank 1, and its lower surface in contact with the liquid surface of the coolant. The pore size of the first capillary wick 21 is greater than or equal to that of the liquid absorption capillary wick 23.

[0035] like Figure 1 As shown, the first capillary wick 21 is a sheet-like structure with a certain thickness, shaped like a disc, with its edge connected to the inner wall of the main tank 12, and its lower surface overlapping the connecting plane between the liquid storage head 11 and the main tank 12. The liquid-absorbing capillary wick 23 is connected to both the inner wall of the main tank 12 and the upper surface of the first capillary wick 21.

[0036] According to an embodiment of the present invention, the liquid storage capillary wick further includes a second capillary wick 22, which is the main body of the liquid storage capillary wick. The second capillary wick 22 has a columnar structure, with its bottom surface connected to the upper surface of the first capillary wick 21, and its sides not in contact with the liquid absorption capillary wick 23 and the liquid discharge capillary wick 24. The pore size of the second capillary wick 22 is larger than that of the first capillary wick 21.

[0037] like Figure 1As shown, the second capillary wick 22 is cylindrical, with its bottom surface connected to the first capillary wick 21. Its cylindrical wall does not contact the inner wall of the main tank 12, the absorbing capillary wick 23, or the draining capillary wick 24, thus allowing it to function as a liquid storage structure independent of the absorbing and draining capillary wicks 23 and 24. The pore size of the second capillary wick 22 is larger than that of the first capillary wick 21, and the pore size of the first capillary wick 21 is greater than or equal to that of the absorbing capillary wick 23. Therefore, in the initial state of the liquid reservoir pressure regulating device according to this embodiment of the invention, the coolant first fills the first capillary wick 21, then flows into the absorbing capillary wick 23. After the absorbing capillary wick 23 becomes saturated, excess coolant flows into the second capillary wick 22. Because the second capillary wick 22 is cylindrical, it can provide a larger liquid storage volume. During operation, the liquid reservoir pressure regulating device according to this embodiment of the invention controls the change in coolant level within the range of the second capillary wick 22, thereby maintaining stable operation of the liquid reservoir pressure regulating device while ensuring the pressure regulation range.

[0038] Figure 2 This is a schematic diagram of the operation of the reservoir pressure regulating device in the pressurized state according to an embodiment of the present invention. The arrows in the diagram indicate the flow direction of the coolant. Figure 2 As shown, when the heating element 4 is working, the coolant in the wick 23 evaporates, and the pressure in the storage tank 1 rises. Under the action of pressure, the coolant in the second wick 22 flows into the first wick 21, and then into the main coolant pipe 5 through the first wick 21 to replenish the pump-driven two-phase circuit system; it also flows into the wick 23 through the first wick 21 to maintain the liquid content of the wick 23, so that the evaporation process can continue.

[0039] Figure 3 This is a schematic diagram of the operation of the reservoir pressure regulating device in a depressurized state according to an embodiment of the present invention. The arrows in the diagram indicate the direction of coolant flow. Figure 3 As shown, when the cooling element 3 is working, the coolant condenses in the drain capillary wick 24, and the pressure inside the storage tank 1 decreases. Under the action of the pressure difference, the pump-driven two-phase circuit system replenishes the coolant to the storage tank 1 through the main coolant pipe 5. The replenished coolant flows from the first capillary wick 21 to the second capillary wick 22. Under the action of the capillary force difference, the coolant condensed in the drain capillary wick 24 flows into the second capillary wick 22 through the suction capillary wick 23, reducing the liquid content in the drain capillary wick 24 and making the condensation process sustainable.

[0040] According to an embodiment of the present invention, the pore size of the drain capillary 24 is larger than that of the second capillary 22.

[0041] Therefore, the order of capillary force in capillary wick group 2 is as follows: wick 23 is greater than or equal to the first capillary wick 21, the first capillary wick 21 is greater than the second capillary wick 22, and the second capillary wick 22 is greater than the draining capillary wick 24. In the initial state of the reservoir pressure regulating device according to an embodiment of the present invention, the injected coolant first fills the first capillary wick 21, then fills the wick 23, and then is stored in the second capillary wick 22. Since the amount of coolant change is always adjusted within the range of the second capillary wick 22, the draining capillary wick 24, with the smallest capillary force, is essentially dry. That is, in the initial state, the wick 23 is essentially saturated with liquid, and the draining capillary wick 24 is essentially dry, having the largest evaporation and condensation range. In the pressurized state, the second capillary wick 22 stores sufficient coolant to replenish the pump-driven two-phase circuit and the wick 23. Under reduced pressure, the second capillary 22 has excess liquid storage space, so under pressure, the condensed coolant generated in the drain capillary 24 can be discharged into the second capillary 22 through the suction capillary 23 and the first capillary 21, and the coolant of the pump-driven two-phase circuit can be discharged into the second capillary 22 through the first capillary 21.

[0042] The liquid reservoir pressure regulating device provided in this embodiment of the invention obtains a larger liquid storage volume by setting a columnar second capillary 22. By setting the pore size of the drain capillary 24, the second capillary 22, the first capillary 21 and the suction capillary 23 to decrease in sequence, the evaporation of coolant can be replenished from the second capillary 22 in a timely manner, and the vapor condensate can be replenished into the second capillary 22 in a timely manner, thereby improving the pressure regulation range.

[0043] According to an embodiment of the present invention, the liquid absorption capillary 23 and the liquid discharge capillary 24 are cylindrical structures, and the outer walls of the liquid absorption capillary 23 and the liquid discharge capillary 24 are connected to the inner wall of the liquid storage tank 1.

[0044] like Figure 1 As shown, both the suction capillary 23 and the discharge capillary 24 are cylindrical. The lower surface of the suction capillary 23 is connected to the upper surface of the first capillary 21, and its outer wall is connected to the inner wall of the main tank 12. The inner wall does not contact the outer wall of the second capillary 22. The lower surface of the discharge capillary 24 is connected to the upper surface of the suction capillary 23, and its outer wall is connected to the inner wall of the main tank 12. The inner wall does not contact the outer wall of the second capillary 22.

[0045] The liquid storage pressure regulating device provided in this embodiment of the invention obtains a large heat exchange area by setting both the liquid suction capillary 23 and the liquid discharge capillary 24 to be cylindrical structures, which is beneficial to the evaporation and condensation processes.

[0046] According to an embodiment of the present invention, the cooling element 3 and the heating element 4 can be respectively arranged around the outer wall of the main tank 12, with their heights corresponding to the drain capillary 24 and the absorbent capillary 23, respectively.

[0047] It should be noted that the cooling element 3 can be a thermoelectric cooling element. During operation, the side connected to the side wall of the main tank 12 is cooled, while the side facing the outside of the main tank 12 experiences a temperature rise due to operation. According to an embodiment of the present invention, as... Figure 1 As shown, the side of the cooling element 3 away from the liquid storage tank 1 is connected to the coolant branch pipe 6. The coolant in the coolant branch pipe 6 passes through the outer surface of the cooling element 3 and carries away the heat generated by the operation of the cooling element 3.

[0048] According to an embodiment of the present invention, the liquid reservoir pressure regulating device further includes a pressure gauge 7 and a controller 8. The pressure gauge 7 is used to monitor the pressure signal of the main coolant pipeline 5, and the controller 8 is used to control the operation of the cooling element 3 or the heating element 4 according to the pressure signal.

[0049] like Figure 1 As shown, pressure gauge 7 is installed on the main coolant pipe 5, and controller 8 is connected to pressure gauge 7, cooling element 3, and heating element 4. When pressure gauge 7 detects that the pressure signal in the main coolant pipe 5 is less than the target value, it needs to replenish coolant and pressurize the main coolant pipe 5. In this case, it controls heating element 4 to work, causing evaporation and pressurization in the reservoir 1. When pressure gauge 7 detects that the pressure signal in the main coolant pipe 5 is greater than the target value, it needs to depressurize the main coolant pipe 5. In this case, it controls cooling element 3 to work, causing condensation and pressure reduction in the reservoir 1.

[0050] Another embodiment of the present invention provides a method for regulating the pressure of a liquid reservoir, comprising:

[0051] Step 1: Control the heating element 4 or the cooling element 3 to work according to the control signal.

[0052] Step 2: With the heating element 4 in operation, the liquid-absorbing capillary 23 evaporates the stored coolant and draws liquid from the liquid-receiving capillary to replenish the coolant; the liquid-receiving capillary discharges liquid into the main coolant pipe 5 as the pressure increases. With the cooling element 3 in operation, the liquid-draining capillary 24 absorbs the liquid condensed inside by vapor and discharges it into the liquid-receiving capillary through the liquid-absorbing capillary 23. The liquid-receiving capillary stores the coolant that is discharged into the liquid storage tank 1 from the main coolant pipe 5 as the pressure decreases.

[0053] According to the liquid reservoir pressure regulation method of the present invention, the method further includes the following steps before step 1:

[0054] Vacuum the liquid storage tank 1; fill the liquid storage tank 1 with coolant, and the coolant comes into contact with the first capillary 21 of the liquid storage capillary.

[0055] That is, the coolant does not submerge the upper surface of the first capillary wick 21. After the coolant fills the first capillary wick 21 and the liquid-absorbing capillary wick 23, it is stored in the second capillary wick 22 to ensure that the coolant can always be confined within the capillary wick group 2 and to control the amount of coolant change to always be adjusted within the range of the second capillary wick 22.

[0056] According to the liquid reservoir pressure regulation method of the present invention, step 1 specifically includes: acquiring the pressure signal of the main coolant pipeline 5; when the pressure signal of the main coolant pipeline 5 is greater than the target value, the control signal controls the cooling element 3 to work; when the pressure signal of the main coolant pipeline 5 is less than the target value, the control signal controls the heating element 4 to work.

[0057] Those skilled in the art will understand that the features described in the various embodiments of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments of the present invention can be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

[0058] The embodiments of the present invention have been described above. However, these embodiments are merely illustrative and not intended to limit the scope of the invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the invention is defined by the appended embodiments and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the invention, and all such substitutions and modifications should fall within the scope of the invention.

Claims

1. A liquid reservoir pressure regulating device, characterized in that, include: The liquid storage tank is connected to the main coolant pipeline and is used to contain coolant and steam. A capillary wick assembly is disposed on the inner wall of the liquid storage tank to contain and confine the coolant; The capillary assembly includes: a liquid storage capillary, which is in contact with the surface of the coolant; a liquid absorption capillary, which is connected to the upper surface of the liquid storage capillary; and a liquid discharge capillary, which is connected to the upper surface of the liquid absorption capillary. A cooling element is installed on the outer wall of the liquid storage tank at a position opposite to the liquid draining capillary, and is used to promote the condensation of the vapor in the liquid draining capillary. A heating element is installed on the outer wall of the liquid storage tank at a position opposite to the liquid-absorbing capillary core, and is used to promote the evaporation of the coolant inside the liquid-absorbing capillary core; The pore size of the liquid storage capillary is greater than or equal to that of the liquid absorption capillary, so that the liquid absorption capillary can absorb liquid from the liquid storage capillary. The pore size of the drain capillary is larger than that of the storage capillary, so that the drain capillary can drain liquid to the storage capillary through the absorbent capillary.

2. The liquid reservoir pressure regulating device according to claim 1, characterized in that, The liquid storage capillary includes a first capillary; The first capillary wick has a sheet-like structure, with its edge connected to the inner wall of the liquid storage tank and its lower surface in contact with the surface of the coolant; The pore size of the first capillary core is greater than or equal to that of the liquid-absorbing capillary core.

3. The liquid reservoir pressure regulating device according to claim 2, characterized in that, The liquid storage capillary also includes a second capillary; The second capillary core has a columnar structure, with its bottom surface connected to the upper surface of the first capillary core, and its sides not in contact with the liquid absorption capillary core and the liquid discharge capillary core. The pore size of the second capillary core is larger than that of the first capillary core.

4. The liquid reservoir pressure regulating device according to claim 3, characterized in that, The pore size of the drain capillary is larger than that of the second capillary.

5. The liquid reservoir pressure regulating device according to claim 1, characterized in that, The liquid-absorbing capillary and the liquid-draining capillary are cylindrical structures, and the outer walls of the liquid-absorbing capillary and the liquid-draining capillary are connected to the inner wall of the liquid storage tank.

6. The liquid reservoir pressure regulating device according to claim 1, characterized in that, The side of the cooling chip away from the liquid storage tank is connected to a branch pipe of the coolant to reduce the temperature generated when the cooling chip is working.

7. The liquid reservoir pressure regulating device according to claim 1, characterized in that, Also includes: A pressure gauge is used to monitor the pressure signal of the main coolant pipeline; A controller is used to control the operation of the cooling element or the heating element based on the pressure signal.

8. A method for regulating the pressure of a liquid reservoir based on the liquid reservoir pressure regulating device according to any one of claims 1 to 7, characterized in that, include: The heating element or cooling element is controlled to operate according to the control signal; When the heating element is working, the liquid-absorbing capillary evaporates the stored coolant and draws liquid from the liquid-retaining capillary to replenish the coolant; the liquid-retaining capillary discharges liquid into the main coolant pipe as the pressure increases. When the cooling element is in operation, the drain capillary absorbs the liquid condensed from the vapor inside it and drains the liquid to the storage capillary through the absorbent capillary; the storage capillary stores the coolant that is discharged into the storage tank from the main coolant pipe as the pressure is reduced.

9. The liquid reservoir pressure regulation method according to claim 8, characterized in that, Before controlling the heating element or cooling element to operate according to the control signal, the method further includes: The storage tank is evacuated. The coolant is filled into the storage tank, and the coolant level is in contact with the first capillary of the storage capillary.

10. The liquid reservoir pressure regulation method according to claim 8, characterized in that, The step of controlling the heating element or cooling element to operate according to the control signal includes: Obtain the pressure signal of the main coolant pipeline; When the pressure signal of the main coolant pipeline is greater than the target value, the control signal controls the cooling chip to work; When the pressure signal of the main coolant pipeline is less than the target value, the control signal controls the heating element to work.

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