Self-cooling ring main unit and method

Abstract

The invention provides a self-cooling ring main unit and method, and relates to the technical field of power supply switch devices, the self-cooling ring main unit comprises a plurality of cabinet bodies, each cabinet body is internally provided with an installation structure, an installation chamber is formed in each installation structure, and cooling structures are installed among the installation chambers. The cooling structure comprises a plurality of first cooling devices and a second cooling device, the first cooling devices correspond to the mounting chambers respectively, and each first cooling device comprises a first cooling pipeline allowing a first cooling medium to flow; the first cooling pipeline comprises a U-shaped first cooling part located in the mounting chamber and second cooling parts located on the outer side of the mounting chamber, and the second cooling device communicates with the multiple second cooling parts to form a first cooling loop allowing a first cooling medium to flow. According to the invention, self-adaptive dissipation of heat in a plurality of installation chambers in the ring main unit can be realized, the cooling process is more accurate, and the cooling effect is faster and better.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply switch devices, and in particular to a self-cooling ring network cabinet and a method. Background Art

[0002] During the operation of the ring main unit, its internal components will continue to generate heat during continuous operation. In order to ensure the normal operation of the electrical components inside the ring main unit, the heat inside the ring main unit needs to be dissipated. The common heat dissipation method is to transfer the heat inside the ring main unit to the outside for dissipation through an air cooling or water cooling structure.

[0003] The heat dissipation efficiency of the air-cooled structure is not as high as that of the water-cooled structure. Although the structure is simple, its usage scenarios are limited. For the precise components with large heat dissipation inside the ring network cabinet, a water-cooled structure is usually used for efficient heat dissipation. The ring network cabinet includes multiple groups of similar cabinets, which are connected in series through water cooling equipment, and can achieve rapid heat dissipation of multiple cabinets through one group of water cooling equipment.

[0004] The water cooling structure in multiple cabinets is long, and the flow path of cooling water is long. The water cooling pipes of traditional water cooling equipment are single-channel pipes for directional flow of cooling water. It is impossible to perform targeted and efficient heat dissipation according to the heat generation in different cabinets. The efficiency of liquid flow is low and the heat dissipation effect is poor. Summary of the invention

[0005] In view of the above problems, the present invention provides a self-cooling ring main unit and method, which can realize the adaptive dissipation of heat in multiple installation rooms in the ring main unit, making the cooling process more precise and the cooling effect faster and better.

[0006] To solve the above problems, the technical solution adopted by the present invention is: A self-cooling ring network cabinet comprises a plurality of cabinet bodies, each of which is provided with an installation structure inside, an installation chamber formed in the installation structure, a cooling structure is installed between the plurality of installation chambers, the cooling structure comprises a first cooling device and a second cooling device, a plurality of the first cooling devices are provided and respectively correspond to the installation chambers, the first cooling device comprises a first cooling pipe for a first cooling medium to flow, the first cooling pipe comprises a first U-shaped cooling part located inside the installation chamber and a second cooling part located outside the installation chamber, the second cooling device is connected with the plurality of second cooling parts to form a first cooling circuit for the first cooling medium to flow; a first flow control device is installed in the first cooling part, a second flow control device is installed in the second cooling part, and an adjusting device for controlling the opening size of the two flow control devices is also provided in the installation chamber.

[0007] Preferably, a low-boiling-point liquid is arranged inside the regulating device, the first flow control device and the second flow control device are both fluid control devices, and the regulating device is connected to the first flow control device.

[0008] Preferably, the first flow control device includes a first control housing, a first control piston is sealingly and slidingly connected inside the first control housing, a first control rod is fixed to the upper end of the first control piston, the end of the first control rod passes through the first control housing and partially extends into the first cooling part, the first control housing is divided into a first control chamber and a second control chamber by the first control piston, and the first control chamber is connected to the adjusting device.

[0009] Preferably, the second flow control device includes a second control housing, a second control piston is sealingly and slidingly connected inside the second control housing, a second control rod is fixed to the lower end of the second control piston, the end of the second control rod passes through the second control housing and partially extends into the second cooling part, the second control housing is divided into a third control chamber and a fourth control chamber by the second control piston, and the fourth control chamber is connected to the second control chamber.

[0010] Preferably, the third cooling device further comprises an annular third cooling device, wherein the first end of the third cooling device is located close to the second cooling device, the second end of the third cooling device is close to the cold source, and a second cooling circuit for the second cooling medium to flow is formed in the third cooling device.

[0011] Preferably, a heat exchange enhancement device is provided between the second cooling device and the third cooling device. The heat exchange enhancement device is sleeved on the outside of the second cooling device and the third cooling device. The heat exchange enhancement device is cylindrical and extends along both sides.

[0012] Preferably, a second pump group for pumping the first cooling medium is installed inside the third cooling device, and the second pump group is connected to multiple second flow control devices, and the pumping volume of the second pump group per unit time is adjusted according to the position of the second control piston.

[0013] Preferably, the second pump group includes a pumping shell, the inner wall of the pumping shell is sealingly and slidingly connected with a pumping piston, an elastic element is installed between the pumping piston and the pumping shell, the liquid inlet and liquid outlet of the pumping shell are both installed with a one-way valve, and a position control device is installed on the outside of the pumping piston for adjusting the compression position of the pumping piston.

[0014] Preferably, the position control device has a position control end, a length adjustment component is installed between the position control end and the pumping piston, at least two length adjustment chambers are arranged inside the length adjustment component, and the length adjustment chambers are connected to the corresponding third control chambers.

[0015] A ring main unit self-cooling method uses the above-mentioned self-cooling ring main unit, comprising the following steps: S1, selecting a corresponding number of cooling structures according to the number of cabinets in the ring main unit, and arranging the first cooling part of the cooling structure in the installation room; S2, when the temperature in the installation room exceeds a set threshold, controlling the opening of the first flow control device to be greater than the opening of the second flow control device through an adjusting device, and controlling more first cooling medium to flow through the first cooling part; S3, when the temperature in the installation room is lower than the set threshold, controlling the opening of the first flow control device to be less than the opening of the second flow control device through an adjusting device, and controlling more first cooling medium to flow through the second cooling part.

[0016] The beneficial effects of the present invention are: Through the above-mentioned structural design, compared with the traditional single water-cooled heat dissipation pipeline, the present application can adaptively adjust the circulation path of the first cooling medium according to the heating state of the installation room, and can enter the installation room where the heating exceeds the threshold more quickly, thereby realizing the rapid dissipation of heat in the installation room; and the first cooling medium containing heat will not enter the low-temperature installation room, and this part of heat will also not affect the electrical components in the subsequent low-temperature installation room, thereby realizing the adaptive dissipation of heat in multiple installation rooms in the ring network cabinet, and the cooling process is more precise, and the cooling effect is faster and better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the cooling structure of the present invention.

[0019] Figure 3 For the present invention Figure 2 Schematic diagram of the main structure.

[0020] Figure 4 For the present invention Figure 2 Schematic diagram of the top view structure.

[0021] Figure 5 For the present invention Figure 2 Schematic diagram of the side structure.

[0022] Figure 6 For the present invention Figure 5 AA section view of the structure.

[0023] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at B.

[0024] Figure 8 For the present invention Figure 6Enlarged structural diagram at C.

[0025] Fig. 9 For the present invention Figure 6 Enlarged structural diagram at D.

[0026] In the figure: 100, cabinet; 200, mounting structure; 210, mounting chamber; 300, first cooling device; 310, first cooling pipe; 3101, second cooling unit; 3102, first cooling unit; 320, second flow control device; 321, second control housing; 3211, third control chamber; 3212, fourth control chamber; 322, second control piston; 323, second control rod; 330, first flow control device; 331, first control housing body; 3311, first control chamber; 3312, second control chamber; 332, first control piston; 333, first control rod; 340, adjusting device; 400, second cooling device; 410, one-way valve; 500, third cooling device; 600, second pump group; 610, pumping housing; 620, pumping piston; 630, elastic element; 640, position control device; 650, length adjustment assembly; 700, first pump group; 800, heat exchange enhancement device. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Ring main unit is a common electrical transmission and distribution equipment with a simple internal structure, usually including fuses, load switches and other structures.

[0029] During the operation of the ring main unit, its internal components will continue to generate heat during continuous operation. In order to ensure the normal operation of the electrical components inside the ring main unit, the heat inside the ring main unit needs to be dissipated. The common heat dissipation method is to transfer the heat inside the ring main unit to the outside for dissipation through an air cooling or water cooling structure.

[0030] The heat dissipation efficiency of the air-cooled structure is not as high as that of the water-cooled structure. Although the structure is simple, its usage scenarios are limited. For the precise components with large heat dissipation inside the ring network cabinet, a water-cooled structure is usually used for efficient heat dissipation. The ring network cabinet includes multiple groups of similar cabinets, which are connected in series through water cooling equipment, and can achieve rapid heat dissipation of multiple cabinets through one group of water cooling equipment.

[0031] The water cooling structure in multiple cabinets is long, and the flow path of cooling water is long. The water cooling pipes of traditional water cooling equipment are single-channel pipes for directional flow of cooling water. It is impossible to perform targeted and efficient heat dissipation according to the heat generation in different cabinets. The efficiency of liquid flow is low and the heat dissipation effect is poor.

[0032] In order to solve the above problems, refer to the attached Figure 1 - Attachment Fig. 9 A self-cooling ring main unit includes a plurality of cabinets 100, each of which is provided with a mounting structure 200, wherein a mounting chamber 210 is formed in the mounting structure 200, and a cooling structure is installed between the plurality of mounting chambers 210. The cooling structure here is a liquid cooling structure, and the cooling medium entering the mounting chamber 210 can realize efficient heat dissipation and quickly dissipate the heat generated in the mounting chamber 210; the cooling medium here can be selected as cooling water or cooling oil.

[0033] Specifically, the cooling structure includes a first cooling device 300 and a second cooling device 400. The first cooling device 300 is provided in multiple numbers and corresponds to the installation chamber 210 respectively. The first cooling device 300 includes a first cooling pipe 310 for the flow of the first cooling medium. The first cooling pipe 310 includes a U-shaped first cooling part 3102 located in the installation chamber 210 and a second cooling part 3101 located outside the installation chamber 210.

[0034] Controlling the first cooling medium to enter the first cooling part 3102 can efficiently cool the installation chamber 210, and controlling the first cooling medium to enter the second cooling part 3101 can shorten the flow path of the first cooling medium, thereby achieving efficient cooling of the rear-end installation chamber 210; the second cooling device 400 is connected to multiple second cooling parts 3101 to form a first cooling circuit for the flow of the first cooling medium; the first cooling medium flows in a direction in the first cooling circuit, and can transport the heat in multiple installation chambers 210 to the outside, thereby achieving fast, efficient and precise heat dissipation of multiple installation chambers 210.

[0035] A first flow control device 330 is installed in the first cooling section 3102 , a second flow control device 320 is installed in the second cooling section 3101 , and a regulating device 340 for controlling the opening sizes of the two flow control devices is also provided in the installation chamber 210 .

[0036] The temperature in the installation chamber 210 can be detected by the regulating device 340 , and the regulating device 340 adjusts the opening sizes of the two flow control devices according to the temperature state in the installation chamber 210 , thereby controlling the flow path of the first cooling medium.

[0037] When the temperature in the installation room 210 exceeds the set threshold, the opening of the first flow control device 330 is controlled by the regulating device 340 to be greater than the opening of the second flow control device 320, so that more first cooling medium is controlled to flow through the first cooling part 3102; at this time, the resistance at the second flow control device 320 is greater than the resistance at the first flow control device 330, and more first cooling medium flows through the first flow control device 330, taking away the excess heat in the installation room 210, thereby ensuring the normal operation of the electrical components in the installation room 210.

[0038] When the temperature in the installation chamber 210 is lower than the set threshold, the opening of the first flow control device 330 is controlled by the regulating device 340 to be smaller than the opening of the second flow control device 320, so that more first cooling medium is controlled to flow through the second cooling part 3101. At this time, the resistance at the second flow control device 320 is smaller than the resistance at the first flow control device 330, and more first cooling medium flows through the second flow control device 320. At this time, the flow path of the first cooling medium at this end is shorter, and the flow rate is high, which can quickly take away the heat in the installation chamber 210 that generates heat at the rear, thereby realizing targeted automatic heat dissipation.

[0039] In summary, through the above-mentioned structural design, compared with the traditional single water-cooled heat dissipation pipeline, the present application can adaptively adjust the circulation path of the first cooling medium according to the heating state in the installation chamber 210, and can enter the installation chamber 210 where the heating exceeds the threshold more quickly, thereby realizing the rapid dissipation of heat in the installation chamber 210; and the first cooling medium containing heat will not enter the low-temperature installation chamber 210, and this part of heat will also not affect the electrical components in the subsequent low-temperature installation chamber 210, thereby realizing the adaptive dissipation of heat in multiple installation chambers 210 in the ring network cabinet, and the cooling process is more precise, and the cooling effect is faster and better.

[0040] Furthermore, a low-boiling point liquid is disposed inside the regulating device 340, the first flow control device 330 and the second flow control device 320 are both fluid control devices, and the regulating device 340 is connected to the first flow control device 330.

[0041] When the low-boiling-point liquid in the regulating device 340 is heated, it will expand. After the expansion, the pressure in the regulating device 340 will increase. The increased pressure in the regulating device 340 can push the valve body in the first flow control device 330 to move in the first direction, that is, control the valve body in the first flow control device 330 to form a larger flow gap, which can allow more first cooling medium to pass through.

[0042] At the same time, the second flow control device 320 can also move in the first direction after being subjected to pressure. Since the second flow control device 320 and the first flow control device 330 are installed in opposite directions, the valve body in the second flow control device 320 is controlled to form a smaller flow gap, which can increase resistance and reduce the flow rate of the first cooling medium.

[0043] Here, the moving directions of the second flow control device 320 and the first flow control device 330 can be adjusted and controlled according to their installation positions and internal structures, so as to achieve the effect of increasing or reducing resistance.

[0044] When the low-boiling-point liquid in the regulating device 340 is cooled, the pressure decreases, and the moving directions of the first flow control device 330 and the second flow control device 320 are opposite, which is opposite to the above-mentioned effect. At this time, more first cooling medium can flow through the second flow control device 320, bypassing the installation chamber 210 that does not need heat dissipation, shortening the circulation distance of the installation chamber 210, improving the efficiency of cooling and heat dissipation, and realizing adaptive and precise cooling.

[0045] Through the above-mentioned structural design, the temperature in the installation chamber 210 can be monitored in real time through low-boiling-point liquid to achieve automatic detection and control; the second flow control device 320 and the first flow control device 330 are both controlled by fluid, and the control effect is good and the response speed is fast. At the same time, there is no need for various precision electronic components to cooperate. In the case of no structural damage, the service life is long and the control is precise.

[0046] Please refer to the attached Figure 6 and attached Figure 8 The first flow control device 330 includes a first control housing 331, and a first control piston 332 is sealed and slidably connected inside the first control housing 331. A first control rod 333 is fixed to the upper end of the first control piston 332. The end of the first control rod 333 passes through the first control housing 331 and partially extends into the first cooling part 3102. The valve body is fixed to the first control rod 333. The first control housing 331 is divided into a first control chamber 3311 and a second control chamber 3312 by the first control piston 332. The first control chamber 3311 is connected to the regulating device 340.

[0047] When the regulating device 340 is heated and the pressure increases, since the regulating device 340 is connected to the first control chamber 3311, the pressure in the first control chamber 3311 also increases. In this process, the first control piston 332 is pushed toward the adjacent Figure 8By moving toward the lower middle, the valve body can be staggered with the channel in the first cooling part 3102, and a larger flow gap is formed in the first cooling part 3102 to reduce resistance and allow more first cooling medium to pass through. More first cooling medium passing through can take away the heat dissipated, thereby enhancing the heat dissipation effect in the installation chamber 210, accelerating its cooling, and ensuring the normal operation of the electronic components.

[0048] When the installation chamber 210 is in a low temperature environment, the pressure in the regulating device 340 is relatively low, and the first control piston 332 is in a Figure 8 In the initial position at the upper middle part, the valve body intersects with the first cooling part 3102. At this time, the flow gap becomes smaller and the resistance is greater, which prevents the first cooling medium from entering the first cooling part 3102, shortens its flow path, and realizes rapid cooling of the rear installation chamber 210.

[0049] The first control piston 332 may be provided with a return spring mounted on the inner wall of the first control housing 331, which can push the first control piston 332 to move toward the adjacent Figure 8 The upward movement trend, i.e. controlling the first cooling portion 3102 to be normally in a state of a small flow gap, can accelerate the resetting of the internal valve body and ensure the high efficiency of the overall regulation.

[0050] The vaporization temperature of the low-boiling-point liquid and the elastic coefficient of the return spring here need to be comprehensively determined based on the normal operating temperature in the installation chamber 210; when the operating temperature in the installation chamber 210 needs to be controlled below 40°C, the vaporization temperature of the low-boiling-point liquid should be less than 40°C. If the sensitivity of temperature sensing needs to be increased, the vaporization temperature of the boiling-point liquid can be set lower.

[0051] Please refer to the attached Figure 6 and attached Figure 7 The second flow control device 320 includes a second control housing 321, and a second control piston 322 is sealed and slidably connected inside the second control housing 321. A second control rod 323 is fixed to the lower end of the second control piston 322. The end of the second control rod 323 passes through the second control housing 321 and partially extends into the second cooling part 3101. The valve body is fixed to the end of the second control rod 323. The second control housing 321 is divided into a third control chamber 3211 and a fourth control chamber 3212 by the second control piston 322. The fourth control chamber 3212 is connected to the second control chamber 3312.

[0052] When the regulating device 340 is heated and the pressure increases, it can push the first control piston 332 to move downward. At this time, the space in the second control chamber 3312 is reduced, and the control oil in the second control chamber 3312 is squeezed into the fourth control chamber 3212, which can push the second control piston 322 to move downward. At this time, the second control rod 323 is controlled to drive the valve body at the end to move toward the second cooling part 3101, which can control the flow gap to become smaller, increase the resistance, and allow more first cooling medium to flow through the first cooling part 3102 for heat dissipation.

[0053] After the temperature drops, the movement directions and effects of the second control piston 322 and the second control rod 323 are exactly opposite, which will not be repeated here; at the same time, a spring can also be installed in the second flow control device 320 to control the second control piston 322 to quickly reset.

[0054] Furthermore, it also includes an annular third cooling device 500, the first end of the third cooling device 500 is located close to the second cooling device 400, the second end of the third cooling device 500 is close to the cold source, and a second cooling circuit for the second cooling medium to flow is formed in the third cooling device 500.

[0055] By providing the second cooling circuit, the heat in the first cooling circuit can be quickly dissipated, the temperature reduction and cooling of the first cooling circuit can be accelerated, and the overall cooling effect can be improved.

[0056] The third cooling device 500 and the second cooling device 400 here can be arranged crosswise with each other according to actual needs. The second cooling device 400 can be arranged horizontally to form a shorter loop, and the third cooling device 500 can be controlled to be arranged vertically and extend downward to form a longer loop. The second end of the third cooling device 500 is close to the cold source, and can carry the heat at the second cooling device 400 to the cold source for dissipation, thereby improving the overall heat dissipation effect, while also meeting the installation requirements of most ring network cabinets on the market.

[0057] The cold source here can be comprehensively determined based on the installation situation of the ring network cabinet. When there is flowing liquid under or outside the ring network cabinet, the second end of the third cooling device 500 can be contacted with the flowing liquid to achieve rapid heat dissipation; similarly, cooling fins can be installed at the second end of the third cooling device 500 to achieve efficient heat dissipation.

[0058] A heat exchange enhancement device 800 is provided between the second cooling device 400 and the third cooling device 500. The heat exchange enhancement device 800 is sleeved on the outside of the second cooling device 400 and the third cooling device 500. The heat exchange enhancement device 800 is cylindrical and extends along both sides.

[0059] The heat exchange enhancement device 800 can enhance the heat exchange effect between the second cooling device 400 and the third cooling device 500. The parts of the second cooling device 400 and the third cooling device 500 within the heat exchange enhancement device 800 can be selected to be in a serpentine winding distribution state, which can increase the contact area between the two and improve the overall heat exchange efficiency.

[0060] A second pump group 600 for pumping the first cooling medium is installed inside the third cooling device 500 . The second pump group 600 is connected to a plurality of second flow control devices 320 . The pumping volume of the second pump group 600 per unit time is adjusted according to the position of the second control piston 322 .

[0061] The pumping state of the second pump group 600 can be adjusted by the state of the second flow control device 320. When the second flow control device 320 is in a state of greater resistance, it means that the installation chamber 210 is in a high temperature state. At this time, the pumping efficiency of the second pump group 600 is controlled to increase, and the flow rate of the first cooling medium per unit time is adaptively increased, which automatically improves the cooling effect in the installation chamber 210, and further realizes automatic temperature regulation cooling.

[0062] Specifically, the second pump group 600 includes a pumping shell 610, the inner wall of the pumping shell 610 is sealed and slidably connected with a pumping piston 620, an elastic element 630 is installed between the pumping piston 620 and the pumping shell 610, and a one-way valve 410 is installed at the liquid inlet and the liquid outlet of the pumping shell 610. A position control device 640 is installed on the outer side of the pumping piston 620 for adjusting the compression position of the pumping piston 620.

[0063] The position control device 640 can be used to control the pumping piston 620 to move linearly along a predetermined path. During the linear movement of the pumping piston 620, with the cooperation of the one-way valve 410, the directional flow of the first cooling medium in the second cooling device 400 can be controlled; under the action of the elastic element 630, the pumping piston 620 can be controlled to automatically reset, and the pumping piston 620 and the position control device 640 do not need to be in a connected state.

[0064] The position control device 640 here can be selected as a common telescopic rod or a rotating cam structure, which can control the linear movement of the pumping piston 620 to a certain distance.

[0065] The position control device 640 has a position control end, and a length adjustment component 650 is installed between the position control end and the pumping piston 620. At least two length adjustment chambers are arranged inside the length adjustment component 650, and the length adjustment chambers are connected to the corresponding third control chamber 3211.

[0066] When the second flow control device 320 is in a state of high resistance, the third control chamber 3211 is in a compressed state. At this time, the control oil in the third control chamber 3211 is pumped into the length adjustment chamber, which can control the increase in the overall length of the length adjustment component 650. Under the premise that the moving path of the position control device 640 is certain, the moving path of the pumping piston 620 can be increased to increase the amount of the first cooling medium pumped by the second pump group 600 per unit time.

[0067] At the same time, through the above-mentioned structural design, pressure can be applied to the long-distance adjustment chamber during each squeezing process of the position control device 640, thereby generating reset pressure on the first control piston 332. Through this structural design, there is no need to set a spring in the second flow control device 320 and the first flow control device 330. During each squeezing process, the second flow control device 320 and the first flow control device 330 corresponding to the low-temperature installation chamber 210 can be controlled to reset to the initial state.

[0068] After the pressure in the corresponding installation chamber 210 increases, the pressure in the regulating device 340 cannot control its compression and will not affect the normal flow of the first cooling medium.

[0069] Finally, it should be noted that for systems using hydraulic control, each joint needs to be connected and controlled through a dedicated hose, and the sealing of the connections at the joints needs to be ensured to avoid leakage of the control oil.

[0070] The present invention is further described below in conjunction with the method.

[0071] A ring main unit self-cooling method, using the above self-cooling ring main unit, comprises the following steps; S1. Select a corresponding number of cooling structures according to the number of cabinets 100 in the ring main unit, and set the first cooling part 3102 of the cooling structure in the installation room 210.

[0072] S2. When the temperature in the installation room 210 exceeds the set threshold, the opening of the first flow control device 330 is controlled by the regulating device 340 to be greater than the opening of the second flow control device 320, so that more first cooling medium is controlled to flow through the first cooling part 3102; at this time, the resistance at the second flow control device 320 is greater than the resistance at the first flow control device 330, and more first cooling medium flows through the first flow control device 330, taking away the excess heat in the installation room 210, thereby ensuring the normal operation of the electrical components in the installation room 210.

[0073] S3. When the temperature in the installation chamber 210 is lower than the set threshold, the opening of the first flow control device 330 is controlled to be smaller than the opening of the second flow control device 320 through the regulating device 340, so that more first cooling medium is controlled to flow through the second cooling part 3101; at this time, the resistance at the second flow control device 320 is smaller than the resistance at the first flow control device 330, and more first cooling medium flows through the second flow control device 320. At this time, the path of the first cooling medium flowing at this end is shorter, and the flow rate is low, which can quickly take away the heat in the installation chamber 210 that generates heat at the rear, thereby realizing targeted automatic heat dissipation.

[0074] In summary, through the above scheme, adaptive adjustment of the temperature control in multiple installation rooms 210 can be achieved, and the cooling medium can automatically bypass the low-temperature installation room 210 and enter the high-temperature installation room 210, thereby realizing adaptive cooling of the rear heat-generating installation room 210, thereby improving the efficiency and accuracy of cooling in the ring network cabinet.

[0075] This article uses a ring main unit such as multiple parallel cabinets as an example for explanation. Those skilled in the art can also apply the ideas of this solution to other cabinets or other cooling environments.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-cooling ring main unit, comprising a plurality of cabinets (100), each of the cabinets (100) being provided with a mounting structure (200), a mounting chamber (210) being formed in the mounting structure (200), a cooling structure being installed between the plurality of mounting chambers (210), characterized in that: The cooling structure comprises a first cooling device (300) and a second cooling device (400), wherein the first cooling device (300) is provided with a plurality of first cooling devices (300) and respectively corresponds to the installation chamber (210), wherein the first cooling device (300) comprises a first cooling pipe (310) for a first cooling medium to flow, wherein the first cooling pipe (310) comprises a U-shaped first cooling portion (3102) located in the installation chamber (210) and a second cooling portion (3101) located outside the installation chamber (210), and the second cooling device (400) is connected to the plurality of second cooling portions (3101) to form a first cooling circuit for the first cooling medium to flow; A first flow control device (330) is installed in the first cooling section (3102), a second flow control device (320) is installed in the second cooling section (3101), and a regulating device (340) for controlling the opening sizes of the two flow control devices is also provided in the installation chamber (210).

2. The self-cooling ring main unit according to claim 1, characterized in that: A low-boiling-point liquid is arranged inside the regulating device (340); the first flow control device (330) and the second flow control device (320) are both fluid control devices; the regulating device (340) is in communication with the first flow control device (330).

3. The self-cooling ring main unit according to claim 2, characterized in that: The first flow control device (330) comprises a first control housing (331), the first control housing (331) being sealed and slidably connected with a first control piston (332) inside, a first control rod (333) being fixed to the upper end of the first control piston (332), the end of the first control rod (333) passing through the first control housing (331) and partially extending into the first cooling portion (3102), the first control housing (331) being divided into a first control chamber (3311) and a second control chamber (3312) by the first control piston (332), and the first control chamber (3311) being connected to the regulating device (340).

4. The self-cooling ring main unit according to claim 3, characterized in that: The second flow control device (320) comprises a second control housing (321), the second control housing (321) being sealingly and slidably connected with a second control piston (322) inside, a second control rod (323) being fixed to the lower end of the second control piston (322), the end of the second control rod (323) passing through the second control housing (321) and partially extending into the second cooling portion (3101), the second control housing (321) being divided into a third control chamber (3211) and a fourth control chamber (3212) by the second control piston (322), and the fourth control chamber (3212) being communicated with the second control chamber (3312).

5. The self-cooling ring main unit according to claim 4, characterized in that: The invention also includes an annular third cooling device (500), wherein a first end of the third cooling device (500) is located close to a side of the second cooling device (400), and a second end of the third cooling device (500) is close to a cold source, and a second cooling circuit is formed in the third cooling device (500) for the second cooling medium to flow.

6. The self-cooling ring main unit according to claim 5, characterized in that: A heat exchange enhancement device (800) is provided between the second cooling device (400) and the third cooling device (500); the heat exchange enhancement device (800) is sleeved on the outside of the second cooling device (400) and the third cooling device (500); the heat exchange enhancement device (800) is cylindrical and extends in two-side directions.

7. The self-cooling ring main unit according to claim 5, characterized in that: The third cooling device (500) is internally installed with a second pump group (600) for pumping the flow of the first cooling medium. The second pump group (600) is connected to a plurality of second flow control devices (320). The pumping volume of the second pump group (600) per unit time is adjusted according to the position of the second control piston (322).

8. The self-cooling ring main unit according to claim 7, characterized in that: The second pump assembly (600) comprises a pumping housing (610), the inner wall of the pumping housing (610) being sealingly and slidably connected to a pumping piston (620), an elastic element (630) being installed between the pumping piston (620) and the pumping housing (610), a one-way valve (410) being installed at the liquid inlet and the liquid outlet of the pumping housing (610), and a position control device (640) being installed on the outer side of the pumping piston (620) for adjusting the compression position of the pumping piston (620).

9. The self-cooling ring main unit according to claim 8, characterized in that: The position control device (640) has a position control end, and a length adjustment component (650) is installed between the position control end and the pumping piston (620). At least two length adjustment chambers are arranged inside the length adjustment component (650), and the length adjustment chambers are connected to the corresponding third control chambers (3211).

10. A ring main unit self-cooling method, characterized in that: Using the self-cooling ring main unit according to any one of claims 1 to 9 comprises the following steps: S1. Selecting a corresponding number of cooling structures according to the number of cabinets (100) in the ring main unit, and arranging the first cooling parts (3102) of the cooling structures in the installation room (210); S2, when the temperature in the installation room (210) exceeds a set threshold, the opening of the first flow control device (330) is controlled to be greater than the opening of the second flow control device (320) by the regulating device (340), so that more first cooling medium flows through the first cooling part (3102); S3. When the temperature in the installation room (210) is lower than a set threshold, the opening of the first flow control device (330) is controlled to be lower than the opening of the second flow control device (320) through the regulating device (340), thereby controlling more first cooling medium to flow through the second cooling part (3101).

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