A liquid cooling circulation heat dissipation system for a power distribution cabinet

Abstract

This invention relates to the field of power distribution cabinet technology, specifically to a liquid-cooled circulating heat dissipation system for a power distribution cabinet. The system includes a first cooling pipe, a second cooling pipe, and at least one cooling shell. The first cooling pipe forms a closed loop and has a heat dissipation section and at least one cooling section, both of which are S-shaped. Each cooling section has multiple parallel cooling sub-sections, and each sub-section has at least one cooling sub-section. A tortuous airflow path is formed inside the power distribution cabinet, passing through the heat dissipation section. The second cooling pipe is inserted inside the first cooling pipe and has a corrugated section, which is correspondingly arranged with the cooling sub-section. The cooling shell is fitted onto the cooling pipe sections. Electrical components are mounted on the cooling shell and correspondingly arranged with at least one cooling sub-section. The shape characteristics of the corrugated section create turbulent flow of the cooling liquid, improving heat exchange efficiency.

Description

Technical Field

[0001] This invention relates to the field of power distribution cabinet technology, and in particular to a liquid cooling circulation heat dissipation system for power distribution cabinets. Background Technology

[0002] As the core control unit of the power system, the distribution cabinet undertakes the key functions of centralized power distribution, circuit control and equipment protection. It integrates a variety of high-power-density electrical components such as circuit breakers, contactors, relays and transformers. It is usually installed in a distribution room or computer room with specific protection conditions to ensure the stable operation of the power system.

[0003] During the operation of a distribution cabinet, the internal electrical components continuously release heat due to physical phenomena such as Joule heating generated by current passing through conductors, hysteresis loss in the iron core, and eddy current loss. If this heat cannot be dissipated from the cabinet in a timely manner, it will accumulate inside, causing the ambient temperature inside the cabinet to gradually rise. When the temperature exceeds the rated operating temperature range of the electrical components, it will have multiple negative impacts on the performance and safety of the components. Therefore, constructing an efficient and stable heat dissipation system for the distribution cabinet is a core technical measure to ensure the long-term reliable operation of the equipment, extend the service life of electrical components, reduce the failure rate, and improve the overall safety level.

[0004] Currently, common heat dissipation methods for electrical distribution cabinets are mainly divided into three types: air cooling, liquid cooling, and a combination of air and liquid cooling. In practical applications of liquid cooling, a serpentine coil structure is typically installed inside the cabinet to increase the heat exchange area between the cooling liquid and the electrical components. However, the heat dissipation capacity of the serpentine coil is limited by its structural characteristics, making it difficult to achieve sufficient heat dissipation for the electrical components within the cabinet. Summary of the Invention

[0005] Therefore, it is necessary to provide a liquid cooling circulation heat dissipation system for power distribution cabinets to address the problem of insufficient heat dissipation currently existing in power distribution cabinets.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A liquid-cooled circulating heat dissipation system for a power distribution cabinet, the liquid-cooled circulating heat dissipation system for the power distribution cabinet comprising:

[0008] The first cooling pipe is installed inside the distribution cabinet and forms a closed loop, with cooling liquid circulating inside during use. The first cooling pipe has a heat dissipation pipe section and at least one cooling pipe section. Both the heat dissipation pipe section and the cooling pipe section are S-shaped structures. Each cooling pipe section has multiple parallel cooling branch pipe sections, and each cooling branch pipe section has two or more cooling sub-pipe sections. A tortuous airflow path is formed inside the distribution cabinet, and the tortuous airflow path passes through the heat dissipation pipe section.

[0009] The second cooling pipe is inserted inside the first cooling pipe and follows the same trajectory as the first cooling pipe. The second cooling pipe has a corrugated section, which is correspondingly arranged with the cooling sub-pipe section and is retractable. Cooling liquid circulates inside the second cooling pipe during use.

[0010] At least one cooling shell is installed inside the power distribution cabinet and sleeved on the cooling pipe section; electrical components are installed on the cooling shell and are correspondingly arranged with at least one of the cooling sub-pipe sections;

[0011] An adjustment module is configured to adjust the compression of the bellows section according to the temperature of the electrical component, and when the temperature of the electrical component is greater than a preset temperature, the bellows section is compressed to a preset length; the adjustment module includes an adjustment plate, the adjustment plate is made of shape memory alloy, and the adjustment plate is attached to each bellows section, and the adjustment plate is in contact with the part of the cooling shell corresponding to the electrical component.

[0012] Furthermore, the liquid cooling circulation heat dissipation system of the power distribution cabinet also includes an exhaust fan, which is installed on the power distribution cabinet; the power distribution cabinet has an air inlet, and an S-shaped air passage is formed between the air inlet and the exhaust fan; under the action of the exhaust fan, outside air enters the interior of the power distribution cabinet through the air inlet.

[0013] Furthermore, the liquid cooling circulation heat dissipation system of the power distribution cabinet also includes a first circulation pump and a second circulation pump. The first circulation pump is installed in the power distribution cabinet and configured to enable the cooling liquid in the first cooling pipe to circulate. The second circulation pump is installed in the power distribution cabinet and configured to enable the cooling liquid in the second cooling pipe to circulate.

[0014] Furthermore, the cooling pipe section and the cooling shell are an integral structure.

[0015] Furthermore, a plurality of positioning elements are provided between the first cooling pipe and the second cooling pipe, and the plurality of positioning elements are arranged at intervals along the trajectory of the second cooling pipe. The positioning elements are configured to place the second cooling pipe in the middle of the first cooling pipe.

[0016] Furthermore, when there are multiple cooling pipe sections, the multiple cooling pipe sections are arranged in parallel.

[0017] Furthermore, the cooling liquid flowing in the first cooling pipe is an insulating liquid.

[0018] Furthermore, the insulating liquid is a fluorinated liquid.

[0019] The beneficial effects of this invention are:

[0020] This invention relates to a liquid cooling circulation heat dissipation system for a power distribution cabinet. By setting up a first cooling pipe and a second cooling pipe, and setting the second cooling pipe to have a corrugated section, the cooling liquid is made to flow in a turbulent state when it passes through the corrugated section. At the same time, by utilizing the position characteristics of the cooling shell and electrical components, the cooling liquid in the turbulent state exchanges heat with the electrical components, thereby achieving sufficient heat dissipation for the electrical components in the power distribution cabinet.

[0021] Furthermore, by setting an adjustment module and utilizing the expansion and contraction characteristics of the corrugated pipe section, when the temperature of the electrical component exceeds the preset temperature, the corresponding corrugated pipe section is compressed to the preset length under the action of the adjustment module, further improving the turbulence state of the cooling liquid flowing through the corrugated pipe section, thereby achieving rapid heat dissipation of the electrical component and preventing it from overheating. Attached Figure Description

[0022] Figure 1 A schematic diagram of the liquid cooling circulation heat dissipation system of the power distribution cabinet and the three-dimensional structure of the power distribution cabinet during assembly, provided in the embodiments of the present invention. Figure 1 ;

[0023] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point W in the middle;

[0024] Figure 3 A schematic diagram of the liquid cooling circulation heat dissipation system of the power distribution cabinet and the three-dimensional structure of the power distribution cabinet during assembly, provided in the embodiments of the present invention. Figure 2 ;

[0025] Figure 4 A three-dimensional structural diagram of the cooling pipe section, first connecting pipe section, second connecting pipe section, cooling shell and part of the second cooling pipe of the liquid cooling circulation heat dissipation system of the power distribution cabinet provided in the embodiment of the present invention;

[0026] Figure 5 This is a front view of the assembly structure of the cooling pipe section, the first connecting pipe section, the second connecting pipe section, the cooling shell, and part of the second cooling pipe of the liquid cooling circulation heat dissipation system of the power distribution cabinet provided in the embodiment of the present invention.

[0027] Figure 6 for Figure 5 Sectional view along the AA direction;

[0028] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point X in the middle;

[0029] Figure 8 for Figure 5 Sectional view along the BB direction;

[0030] Figure 9 for Figure 8 A magnified schematic diagram of the structure at point Y in the middle;

[0031] Figure 10 A top view of the assembly of the cooling pipe section, the first connecting pipe section, the second connecting pipe section, the cooling shell, and part of the second cooling pipe of the liquid cooling circulation heat dissipation system of the power distribution cabinet provided in the embodiment of the present invention.

[0032] Figure 11 for Figure 10 Cross-sectional view along the CC direction;

[0033] Figure 12 A three-dimensional structural diagram of the cooling pipe section, first connecting pipe section, second connecting pipe section, second shell and part of the second cooling pipe of the liquid cooling circulation heat dissipation system of the power distribution cabinet provided in the embodiment of the present invention;

[0034] Figure 13 for Figure 12 A magnified schematic diagram of the structure at point Z in the middle.

[0035] in:

[0036] 1. First cooling pipe; 101. Heat dissipation pipe section; 102. Cooling pipe section; 1021. Cooling sub-pipe section; 10211. Cooling sub-pipe section; 103. First connecting pipe section; 104. Second connecting pipe section; 105. Deformed pipe section;

[0037] 2. Second cooling pipe; 201. Corrugated pipe section;

[0038] 3. Cooling shell; 301. First shell; 302. Second shell;

[0039] 4. Adjustment module; 401. Adjustment plate;

[0040] 5. Exhaust fan;

[0041] 6. First circulating pump;

[0042] 7. Second circulation pump;

[0043] 8. Positioning component; 801. Flow hole;

[0044] 9. Distribution cabinet; 901. Cabinet body; 902. Cabinet door; 9021. Air inlet. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0046] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] The heat dissipation effect of existing serpentine coils is highly dependent on the heat transfer path between the coil and the electrical components. On the one hand, serpentine coils are usually fixed installation structures, and their pipe routing and arrangement are relatively fixed. For electrical components that are far from the coil or are blocked by other electrical components, heat is difficult to be quickly transferred to the surface of the coil through air or heat transfer medium, resulting in heat dissipation blind spots in these areas, and the temperature of the electrical components cannot be effectively reduced. On the other hand, the heat exchange efficiency of the serpentine coil is limited by the flow state of the cooling liquid inside the tube. At the bends of the coil, the cooling liquid is prone to uneven flow velocity and local eddies, which leads to a decrease in the heat exchange efficiency of some sections, failing to fully utilize the heat dissipation potential of the cooling liquid. In addition, if the heat transfer between the serpentine coil and the electrical components relies solely on air, the low thermal conductivity of air will significantly increase the thermal resistance, causing a significant lag in the process of heat transfer from the surface of the electrical components to the surface of the coil. Especially when high-power electrical components are working intensively, the rate of heat generation may exceed the heat dissipation rate of the coil, causing the temperature of the electrical components to rise continuously, failing to meet the requirements for sufficient heat dissipation.

[0049] Based on this, the present invention provides a liquid cooling circulation heat dissipation system for a power distribution cabinet, which is particularly suitable for dissipating heat from electrical components inside the power distribution cabinet 9. Of course, it is also suitable for dissipating heat from other components that require heat dissipation.

[0050] Specifically, such as Figures 1 to 13 As shown, the liquid cooling circulation heat dissipation system of the distribution cabinet is applied to the distribution cabinet 9. The distribution cabinet 9 has a cabinet body 901 and a cabinet door 902. The cabinet body 901 is a vertical box-type structure with an open front side wall. The cabinet door 902 is hinged to the cabinet body 901 and is configured to open or close the open front side wall of the cabinet body 901. A first cooling pipe 1 is installed inside the distribution cabinet 9. The first cooling pipe 1 has a heat dissipation pipe section 101 and at least one cooling pipe section 102. The heat dissipation pipe section 101 is fixedly installed on the left side wall of the cabinet door 902 and has an S-shaped structure, extending from top to bottom. The cooling pipe section 102 is fixedly installed on the rear inner side wall of the cabinet body 901 and has an S-shaped structure, extending from top to bottom. The cooling pipe section 102 and the heat dissipation pipe section 101 are at the same height.

[0051] Taking a configuration with two cooling pipe sections 102 as an example, the two cooling pipe sections 102 are arranged side by side, and their lower ends are connected to a first connecting pipe section 103. The first connecting pipe section 103 is a T-junction structure and is also connected to the lower end of the heat dissipation pipe section 101. The upper ends of the two cooling pipe sections 102 are connected to a second connecting pipe section 104, which is also a T-junction structure and is also connected to the upper end of the heat dissipation pipe section 101, thus forming a closed flow path in the first cooling pipe circuit 1. During use, the first cooling pipe circuit 1 circulates internally... Cooling liquid flows in a circulation; the arrangement of the first connecting pipe section 103 and the second connecting pipe section 104 enables the two cooling pipe sections 102 to be connected in parallel, ensuring that the cooling liquid flowing into the two cooling pipe sections 102 has a nearly uniform temperature, thereby ensuring the cooling effect of the two cooling pipe sections 102; deformable pipe sections 105 are provided at the lower end connection between the first connecting pipe section 103 and the heat dissipation pipe section 101, and at the upper end connection between the second connecting pipe section 104 and the heat dissipation pipe section 101. The deformable pipe sections 105 can deform with the rotation of the cabinet door 902 to avoid interference.

[0052] To facilitate the circulation of cooling liquid inside the first cooling pipe 1, a disconnection is provided on the heat dissipation pipe section 101, and both ends of the heat dissipation pipe section 101 at the disconnection are sealed. A first circulation pump 6 is fixedly installed on the left side wall of the cabinet door 902, and the two ends of the first circulation pump 6 are respectively connected to the two ends of the heat dissipation pipe section 101 at the disconnection.

[0053] Each cooling pipe section 102 has multiple parallel cooling sub-sections 1021. The cooling sub-sections 1021 extend horizontally in the left-right direction. The multiple cooling sub-sections 1021 of the same cooling pipe section 102 are arranged at equal intervals in the up-down direction. Each cooling sub-section 1021 has at least one cooling sub-section 10211. Taking the example that each cooling sub-section 1021 has two cooling sub-sections 10211, the two cooling sub-sections 10211 of the same cooling sub-section 1021 are arranged collinearly and at intervals.

[0054] The first cooling pipe 1 is fitted with a second cooling pipe 2. The trajectory of the second cooling pipe 2 is the same as that of the first cooling pipe 1. The second cooling pipe 2 has a corrugated section 201, and the corrugated section 201 and the cooling sub-pipe section 10211 are correspondingly arranged. Cooling liquid circulates inside the second cooling pipe 2 during use.

[0055] To facilitate the circulation of cooling liquid inside the second cooling pipe 2, a second circulation pump 7 is fixedly installed on the left side wall of the cabinet door 902. The second circulation pump 7 is connected to the second cooling pipe 2 located at the disconnection point.

[0056] The distribution cabinet 9 also has at least one cooling shell 3 installed inside. The cooling shell 3 is fixedly installed on the rear inner side wall of the cabinet 901. Taking two cooling shells 3 as an example, the two cooling shells 3 are arranged side by side and respectively fitted onto two cooling pipe sections 102. In order to facilitate the installation of the cooling pipe sections 102, the cooling shell 3 is divided into a first sub-shell 301 and a second sub-shell 302 along the front-back direction. The first sub-shell 301 is located in front of the second sub-shell 302 and is connected to it by screws. During installation, it is clamped between the first sub-shell 301 and the second sub-shell 302. Electrical components are installed on the first sub-shell 301 and are correspondingly arranged with a cooling sub-pipe section 10211.

[0057] To facilitate simultaneous heat dissipation of the electrical components inside the distribution cabinet 9 and the cooling liquid inside the heat dissipation pipe section 101, a tortuous airflow path is formed inside the distribution cabinet 9. The tortuous airflow path passes through the heat dissipation pipe section 101. In this way, when the air flows along the tortuous airflow path, it can simultaneously carry away the heat from the electrical components inside the distribution cabinet 9 and the cooling liquid inside the heat dissipation pipe section 101.

[0058] Specifically, an exhaust fan 5 is installed on the rear wall of the cabinet 901. The exhaust fan 5 is located above the cooling pipe section 102 and is connected to the outside. An air inlet 9021 is opened on the cabinet door 902. The air inlet 9021 is located below the heat dissipation pipe section 101. The height difference between the exhaust fan 5 and the air inlet 9021, as well as the suction effect of the exhaust fan 5, can be used to form an S-shaped tortuous air path, thereby achieving heat dissipation for the electrical components in the distribution cabinet 9 and the cooling liquid in the heat dissipation pipe section 101.

[0059] During use, the first circulation pump 6, the second circulation pump 7, and the exhaust fan 5 are started. The first circulation pump 6 causes the coolant to circulate in the first cooling pipe 1, the second circulation pump 7 causes the coolant to circulate in the second cooling pipe 2, and the exhaust fan 5 causes the air to flow along an S-shaped tortuous airflow path inside the distribution cabinet 9.

[0060] When the cooling liquid in the first cooling pipe 1 flows through the corrugated pipe section 201, the periodic undulating shape of the pipe wall disrupts the originally stable flow of the cooling liquid. During the flow of the cooling liquid, the raised parts obstruct and divert the flow, while the recessed parts create local low-pressure areas, causing the liquid to form vortices and disturbances, ultimately transforming the cooling liquid from a laminar flow state to a turbulent flow state. In the turbulent state, the cooling liquid molecules move more violently, allowing for more thorough contact with the outer surface of the corrugated pipe section 201, significantly reducing the thickness of the thermal boundary layer between the liquid and the pipe wall. This thinning of the thermal boundary layer reduces thermal resistance and accelerates the rate at which heat is transferred from the outer surface of the corrugated pipe section 201 to the cooling liquid.

[0061] Meanwhile, since the electrical components, the corrugated pipe section 201, and the cooling sub-pipe section 10211 are arranged in a corresponding manner, the heat generated by the electrical components during operation is first transferred to the cooling sub-pipe section 10211 through the cooling shell 3 in contact with them. The cooling sub-pipe section 10211 then conducts the heat to the cooling liquid. When the cooling liquid, which is in a turbulent state, flows through the corrugated pipe section 201, it can quickly absorb the heat transferred by the cooling sub-pipe section 10211. Moreover, the liquid mixing effect brought about by the turbulence can prevent the cooling liquid temperature from rising due to heat accumulation in local areas, ensuring that the cooling liquid always maintains a high heat absorption capacity. This efficiently removes heat from the electrical components and achieves sufficient heat dissipation for the electrical components in the distribution cabinet 9.

[0062] When the cooling liquid in the second cooling pipe 2 flows through the corrugated pipe section 201, the inner surface of the corrugated pipe section 201, which also has an undulating structure, will disturb the cooling liquid flowing in the second cooling pipe 2. When the cooling liquid flows through the convex inner surface, the flow direction is forced to change, forming local eddies; when it flows through the concave inner surface, secondary flow will occur as the cooling liquid fills the concave area. These factors work together to create turbulence in the cooling liquid within the second cooling pipe 2. The turbulent cooling liquid can adhere more tightly to the inner surface of the corrugated pipe section 201, accelerating the transfer of heat from the wall of the corrugated pipe section 201 to the cooling liquid.

[0063] Furthermore, because the corrugated pipe section 201 is correspondingly arranged with the cooling sub-pipe section 10211, the heat absorbed by the electrical components in the cooling sub-pipe section 10211 is sequentially transferred to the pipe wall of the first cooling pipe 1 and the pipe wall of the second cooling pipe 2, and is finally absorbed by the cooling liquid in the turbulent state in the second cooling pipe 2. Compared with laminar flow, turbulent flow can significantly improve the heat absorption efficiency of the cooling liquid, avoid heat accumulation at the pipe wall, and quickly reduce the temperature of the cooling sub-pipe section 10211. The reduction in the temperature of the cooling sub-pipe section 10211 can further enhance its heat absorption capacity for electrical components, forming an efficient heat transfer chain, thereby achieving sufficient heat dissipation of the cooling sub-pipe section 10211, and ultimately ensuring that the electrical components in the distribution cabinet 9 are always within a safe temperature range.

[0064] In a further embodiment, in order to target the heat dissipation of the electrical components with the highest temperature at the same cooling pipe section 1021 and avoid their overheating damage, the corrugated pipe section 201 is configured to be expandable and contractible; the liquid cooling circulation heat dissipation system of the distribution cabinet also includes an adjustment module 4, which is configured to adjust the compression amount of the corrugated pipe section 201 according to the temperature of the electrical components, and when the temperature of the electrical components is greater than a preset temperature, the corrugated pipe section 201 is compressed to a preset length.

[0065] Thus, after the corrugated pipe section 201 is compressed, when the cooling liquid in the first cooling pipe 1 flows through the compressed corrugated pipe section 201, it forms a further turbulent flow under the guidance of the outer surface of the corrugated pipe section 201. Since the electrical components, the corrugated pipe section 201 and the cooling sub-pipe section 10211 are all corresponding, the cooling liquid in the further turbulent state can exchange heat more fully with the electrical components. When the cooling liquid in the second cooling pipe 2 flows through the compressed corrugated pipe section 201, it forms a further turbulent flow under the guidance of the inner surface of the corrugated pipe section 201. Since the corrugated pipe section 201 and the cooling sub-pipe section 10211 are corresponding, the cooling liquid in the further turbulent state can exchange heat more fully with the cooling sub-pipe section 10211, thereby achieving more sufficient heat dissipation for the electrical components in the distribution cabinet 9.

[0066] Specifically, the adjustment module 4 is configured to include an adjustment plate 401, which is made of shape memory alloy. Each corrugated pipe section 201 is provided with an adjustment plate 401. The adjustment plate 401 has a corrugated section, which is arranged overlappingly on the corrugated pipe section 201 and located between the corrugated pipe section 201 and the first shell 301. Both ends of the corrugated section are in contact with the first shell 301, ensuring that the heat of the electrical component can be transferred to the adjustment plate 401 through the first shell 301, so as to trigger the deformation of the adjustment plate 401 when the temperature of the electrical component is higher than the preset temperature.

[0067] During use, when the temperature of the electrical components exceeds the preset temperature, the regulating plate 401 reaches the high-temperature deformation point through heat conduction. At this time, the regulating plate 401 shrinks and deforms, which simultaneously drives the corrugated pipe section 201 to compress.

[0068] In other embodiments, to improve ease of assembly, the cooling pipe section 102 and the cooling shell 3 are configured as an integral structure.

[0069] Specifically, an S-shaped channel is formed inside the cooling shell 3. This S-shaped channel is the cooling pipe section 102. Therefore, during installation, the first connecting pipe section 103, the second connecting pipe section 104 and the S-shaped channel can be directly connected without disassembling the cooling shell 3 into the first sub-shell 301 and the second sub-shell 302.

[0070] In other embodiments, to ensure smooth flow of cooling liquid within the first cooling pipe 1, a plurality of positioning members 8 are provided between the first cooling pipe 1 and the second cooling pipe 2. The positioning members 8 are arranged at intervals along the trajectory of the second cooling pipe 2, and are configured to position the second cooling pipe 2 in the middle of the first cooling pipe 1. This creates a rotating space between the first cooling pipe 1 and the second cooling pipe 2, preventing a situation where one side is larger than the other.

[0071] Specifically, the positioning element 8 can be configured as a plate-like structure and is perpendicular to the second cooling pipe 2. The plate surface of the positioning element 8 is provided with a mounting hole, which is coaxial with the first cooling pipe 1. The positioning element 8 is sleeved on the second cooling pipe 2 through the mounting hole, and the second cooling pipe 2 is placed in the middle of the first cooling pipe 1 through the mounting hole. At least one flow hole 801 is also provided on the plate surface of the positioning element 8. The flow hole 801 is configured to allow the cooling liquid to pass through, so as to prevent the flow path in the first cooling pipe 1 from being laterally cut off.

[0072] In other embodiments, when the first cooling pipe 1 is damaged, to prevent the coolant flowing out and damaging electrical components, the coolant flowing in the first cooling pipe 1 is configured to be an insulating liquid. Thus, the insulating properties of the insulating liquid can be utilized to prevent the electrical components from conducting electricity.

[0073] Specifically, the insulating liquid can be a fluorinated liquid.

[0074] In other embodiments, the multiple cooling pipe sections 1021 may also be configured to be connected in series.

[0075] Specifically, taking the setting of two cooling pipe sections 1021 as an example, the lower end of the cooling pipe section 1021 on the left is connected to the lower end of the heat dissipation pipe section 101, the upper end of the cooling pipe section 1021 on the left is connected to the lower end of the cooling pipe section 1021 on the right, and the upper end of the cooling pipe section 1021 on the right is connected to the upper end of the heat dissipation pipe section 101, ensuring that the first cooling pipe 1 forms a closed loop.

[0076] In other embodiments, an electrical component is configured to correspond to multiple cooling sub-pipes 10211 simultaneously. This is equivalent to multiple cold sources simultaneously dissipating heat from the same electrical component, which can improve heat dissipation efficiency and achieve refined heat dissipation.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A liquid-cooled circulating heat dissipation system for a power distribution cabinet, characterized in that, The liquid cooling circulation heat dissipation system of the power distribution cabinet includes: The first cooling pipe (1) is installed inside the distribution cabinet (9) and forms a closed loop, with cooling liquid circulating inside during use; the first cooling pipe (1) has a heat dissipation pipe section (101) and at least one cooling pipe section (102), both the heat dissipation pipe section (101) and the cooling pipe section (102) are S-shaped structures, each cooling pipe section (102) has multiple parallel cooling sub-pipe sections (1021), and each cooling sub-pipe section (1021) has two or more cooling sub-pipe sections (10211); a tortuous air path is formed inside the distribution cabinet (9), and the tortuous air path passes through the heat dissipation pipe section (101). The second cooling pipe (2) is inserted inside the first cooling pipe (1) and its trajectory is the same as that of the first cooling pipe (1). The second cooling pipe (2) has a corrugated pipe section (201). The corrugated pipe section (201) and the cooling sub-pipe section (10211) are correspondingly arranged and can be extended and retracted. Cooling liquid circulates inside the second cooling pipe (2) during use. At least one cooling shell (3) is installed inside the power distribution cabinet (9) and sleeved on the cooling pipe section (102); electrical components are installed on the cooling shell (3) and are correspondingly arranged with at least one of the cooling sub-pipe sections (10211); The adjustment module (4) is configured to adjust the compression of the bellows section (201) according to the temperature of the electrical component, and when the temperature of the electrical component is greater than a preset temperature, the bellows section (201) is compressed to a preset length; the adjustment module (4) includes an adjustment plate (401), the material of the adjustment plate (401) is a shape memory alloy, and the adjustment plate (401) is attached to each bellows section (201), and the adjustment plate (401) is in contact with the part of the cooling shell (3) corresponding to the electrical component.

2. The liquid-cooled circulating heat dissipation system for the distribution cabinet according to claim 1, characterized in that, The liquid cooling circulation heat dissipation system of the power distribution cabinet also includes an exhaust fan (5), which is installed on the power distribution cabinet (9); the power distribution cabinet (9) is provided with an air inlet (9021), and an S-shaped tortuous air path is formed between the air inlet (9021) and the exhaust fan (5); under the action of the exhaust fan (5), outside air enters the interior of the power distribution cabinet (9) through the air inlet (9021).

3. The liquid-cooled circulating heat dissipation system for the distribution cabinet according to claim 1, characterized in that, The liquid cooling circulation heat dissipation system of the power distribution cabinet also includes a first circulation pump (6) and a second circulation pump (7). The first circulation pump (6) is located in the power distribution cabinet (9) and is configured to enable the cooling liquid in the first cooling pipe (1) to form a circulation flow. The second circulation pump (7) is located in the power distribution cabinet (9) and is configured to enable the cooling liquid in the second cooling pipe (2) to form a circulation flow.

4. The liquid-cooled circulating heat dissipation system for the distribution cabinet according to claim 1, characterized in that, The cooling pipe section (102) and the cooling shell (3) are an integral structure.

5. The liquid-cooled circulating heat dissipation system for the distribution cabinet according to claim 1, characterized in that, A plurality of positioning elements (8) are provided between the first cooling pipe (1) and the second cooling pipe (2). The plurality of positioning elements (8) are arranged at intervals along the trajectory of the second cooling pipe (2). The positioning elements (8) are configured to place the second cooling pipe (2) in the middle of the first cooling pipe (1).

6. The liquid-cooled circulating heat dissipation system for the distribution cabinet according to claim 1, characterized in that, When there are multiple cooling pipe sections (102), the multiple cooling pipe sections (102) are arranged in parallel.

7. The liquid-cooled circulating heat dissipation system for the distribution cabinet according to claim 1, characterized in that, The cooling liquid flowing in the first cooling pipe (1) is an insulating liquid.

8. The liquid-cooled circulating heat dissipation system for the distribution cabinet according to claim 7, characterized in that, The insulating liquid is a fluorinated liquid.

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