Bus duct circulating refrigeration system

Abstract

This invention relates to the technical field of heat dissipation for power distribution equipment, and mainly discloses a busbar trunking circulating cooling system, which includes at least two sets of busbar trunking. A first cooling guide plate is provided within each busbar trunking, and a first flow channel group is formed within the first cooling guide plate. A second flow channel group is also formed within the side wall of the busbar trunking. A third flow channel group is formed within the second cooling guide plate of the connector assembly. The busbar assembly covers both sides of the second cooling guide plate. The refrigerant outlet of the cooling device is connected to the first flow channel group in an adjacent busbar trunking through a first pipeline group, and the refrigerant inlet is connected to the second flow channel group in an adjacent busbar assembly and the third flow channel group in the connector assembly through a second pipeline group. The first flow channel group through which the refrigerant last flows is connected to the second flow channel group through the third pipeline group. This invention overcomes the problem of insufficient coverage and heat concentration issues in existing power distribution equipment due to inadequate heat dissipation structures.

Description

Technical Field

[0001] This invention relates to the technical field of heat dissipation for power distribution equipment, and in particular to a busbar refrigeration system. Background Technology

[0002] Existing busbar cooling systems rely excessively on natural heat dissipation from the busbar casing or external air-cooling structures. The heat dissipation design lacks integrated adaptation with the busbar's conductive body and connector structure, resulting in poor heat conduction paths.

[0003] As the core area where current converges, the existing heat dissipation structure is insufficiently covered, resulting in significant heat concentration. Under high current loads, local overheating is prone to occur, accelerating the aging of insulation components and even posing safety hazards. At the same time, the existing heat dissipation structure lacks a targeted thermal expansion adaptation design. During long-term operation, it is susceptible to deformation and misalignment between the shell and the internal structure due to alternating temperature changes, further hindering heat conduction and potentially leading to a chain of failures such as seal failure and dust intrusion.

[0004] In addition, existing heat dissipation configurations are mostly fixed specifications, which cannot be flexibly adjusted according to the heat dissipation requirements of different current loads. Furthermore, external air cooling and other structures require additional installation space, and the disassembly and maintenance process is cumbersome. The adaptability and ease of operation and maintenance are difficult to meet the needs of complex scenarios. These problems together restrict the operational reliability and applicability of bus trunking. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is that the existing heat dissipation structure in the existing power distribution equipment is insufficient, the heat concentration problem is particularly prominent, and it cannot be flexibly adjusted according to the heat dissipation requirements of different current loads. Moreover, external air cooling and other structures require additional installation space, the disassembly and maintenance process is cumbersome, and the adaptability and operation and maintenance convenience are difficult to meet the needs of complex scenarios.

[0006] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a busbar trunking circulating cooling system, which includes at least two sets of busbar trunking. A first cooling guide plate is provided in the middle of the busbar group within each busbar trunking, and a first flow channel group is formed within the first cooling guide plate. A second flow channel group is also symmetrically formed within the sidewall of each busbar trunking that is in direct contact with air. A connector assembly is used to connect adjacent busbar trunking, and a third flow channel group is formed within the symmetrically arranged second cooling guide plate within it. The same phase busbar group is covered by both sides of the second cooling guide plate. A cooling device is provided, wherein the refrigerant outlet of the cooling device is connected to the first flow channel group in the adjacent busbar trunking through a first pipeline group, and the refrigerant inlet of the cooling device is connected to the second flow channel group in the adjacent busbar group and the third flow channel group in the connector assembly through a second pipeline group. The first flow channel group through which the refrigerant last flows is connected to the second flow channel group through the third pipeline group, forming a circulation channel.

[0007] In a preferred embodiment of the busbar trunking circulating cooling system of the present invention: the first flow channel group is arranged along the extension direction of the busbar trunking, including a first cooling channel group and a second cooling channel group arranged symmetrically, the ends of the first cooling channel group and the second cooling channel group respectively intersect with the two ends of the busbar trunking; a buffer channel is provided between the first cooling channel group and the second cooling channel group.

[0008] In a preferred embodiment of the busbar circulation cooling system of the present invention: the first cooling channel group includes a first refrigerant channel and a second refrigerant channel, the first refrigerant channel includes a first horizontal flow channel, the second refrigerant channel includes a second horizontal flow channel, a rotary flow channel and a third horizontal flow channel; wherein, the second horizontal flow channel is symmetrically overlapped and separated at both ends of the first horizontal flow channel, the third horizontal flow channel is parallel and separated between the first horizontal flow channel and the buffer channel, and the rotary flow channel connects the two ends of the second refrigerant channel and the third horizontal flow channel.

[0009] In a preferred embodiment of the busbar trunking circulating refrigeration system of the present invention: a first connector assembly and a second connector assembly are symmetrically fixed on the outer walls of the two busbar trunking sides adjacent to the second flow channel group. A first inlet pipe and a second inlet pipe are symmetrically fixed on the first connector assembly, and a first outlet pipe and a second outlet pipe are symmetrically fixed on the second connector assembly. The first inlet pipe and the first outlet pipe are fixed to the refrigerant inlet and outlet of the second horizontal flow channel, and the second inlet pipe and the second outlet pipe are fixed to the refrigerant inlet and outlet of the first horizontal flow channel.

[0010] In a preferred embodiment of the busbar circulation cooling system of the present invention: the second flow channel group is symmetrically fixed with a third inlet pipe and a third outlet pipe on the outer walls of the corresponding two ends of the busbar, and the third inlet pipe and the third outlet pipe are respectively located on the side walls of the two ends of the busbar close to the first connector assembly and the second connector assembly.

[0011] In a preferred embodiment of the busbar trunking circulating cooling system of the present invention: the third flow channel group includes a third refrigerant channel and a fourth refrigerant channel arranged symmetrically, wherein the third refrigerant channel; both the third refrigerant channel and the fourth refrigerant channel have at least one set; if the third refrigerant channel and the fourth refrigerant channel have more than one set, then the number of the third refrigerant channel and the fourth refrigerant channel is the same; wherein the third refrigerant channel and the fourth refrigerant channel correspond to the conductor heating area of ​​the busbar group in the connection area on both sides of the connector assembly.

[0012] In a preferred embodiment of the bus trunking circulating refrigeration system of the present invention: one end of the third refrigerant channel and the fourth refrigerant channel are connected by a connecting refrigerant channel, and the other end of the second cooling guide plate is respectively fixedly connected to the fourth inlet pipe and the fourth outlet pipe.

[0013] In a preferred embodiment of the busbar circulation refrigeration system of the present invention: the refrigeration device is provided with a refrigerant outlet and a refrigerant recovery outlet, the initial delivery pipe of the first pipeline group is connected to the refrigerant outlet and the first inlet pipe and the second inlet pipe, and the final return pipe of the second pipeline group is connected to the refrigerant recovery outlet and the third outlet pipe.

[0014] In a preferred embodiment of the busbar trunking circulating cooling system of the present invention: the first pipeline group further includes an intermediate connecting pipe, the intermediate connecting pipe including a first connecting pipe and a second connecting pipe, the first connecting pipe connecting the first outlet pipe and the second inlet pipe in two adjacent busbar trunking groups, and the second connecting pipe connecting the second outlet pipe and the first inlet pipe in two adjacent busbar trunking groups.

[0015] In a preferred embodiment of the busbar trunking circulating refrigeration system of the present invention: the second pipeline group further includes a return flow connecting pipe, the return flow connecting pipe including a straight pipe, a first interactive pipe and a second interactive pipe, the straight pipe being located on one side of the busbar trunking, and the first interactive pipe and the second interactive pipe being located on the other side of the busbar trunking; wherein, the straight pipe connects the third inlet pipe and the third outlet pipe on one side of two adjacent busbar trunking groups; on the other side, the first interactive pipe connects the third outlet pipe of the previous group and all the fourth inlet pipes of the second cooling guide plate, and the second interactive pipe connects all the fourth outlet pipes and the third inlet pipe in the next group of busbar trunking groups; the third pipeline group is provided in two sets on the busbar trunking through which the refrigerant last flows, one set of the third pipeline group connecting the first outlet pipe, the second outlet pipe and the third inlet pipe on one side, and the other set of the third pipeline group connecting the first outlet pipe, the second outlet pipe and the third inlet pipe on the other side.

[0016] The beneficial effects of this invention are as follows: This invention integrates the functions of grounding and cooling through the first cooling guide plate, and combines it with an insulating thermal pad to meet the dual requirements of electrical insulation and efficient heat conduction. While simplifying the overall structure, it also ensures the reliability of the three-phase power supply and grounding system.

[0017] Based on this, the three-dimensional heat dissipation layout constructed by the "first flow channel group + second flow channel group" works in synergy with the second cooling guide plate at the joint to cover the three-phase busbar for heat dissipation, accurately covering the core heat-generating area and the heat concentration area at the joint, and fundamentally solving the problem of heat dissipation dead zones in traditional solutions.

[0018] Furthermore, the closed-loop circulation system, combined with the refrigerant cascade utilization design and the dynamic adjustment function of the electromagnetic diverter valve, further improves refrigeration efficiency and energy utilization, achieving a balance between heat dissipation requirements and energy-saving goals. Structural optimizations such as connecting bosses, buffer channels, and elastic gaskets effectively enhance vibration damping and sealing performance, preventing potential problems like flow channel deformation and refrigerant leakage during long-term operation, thus extending the system's service life. In addition, standardized interfaces and modular design allow for flexible adaptation to different current conditions, significantly reducing installation and maintenance difficulty, and overall significantly improving the reliability, stability, and heat dissipation efficiency of the busbar trunking in high-power scenarios. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 The overall structural layout of the busbar cooling system is shown.

[0020] Figure 2 The diagram shows the connection arrangement of the busbar trunking and connector assembly in the busbar trunking circulating cooling system.

[0021] Figure 3 A schematic diagram of the connection between the busbar trunking and the connector assembly in a busbar trunking circulating cooling system is shown.

[0022] Figure 4 The diagram shows the distribution of the first flow channel group in the busbar circulating refrigeration system.

[0023] Figure 5 The diagram shows the structure of the first and second cooling channel groups of the busbar circulating refrigeration system.

[0024] Figure 6 A cross-sectional view of the busbar trunking in a busbar trunking circulating cooling system is shown.

[0025] Figure 7 A schematic diagram showing the location of the second flow channel group in the busbar circulating refrigeration system is shown.

[0026] Figure 8 The diagram shows the specific structure of the third flow channel group in the busbar refrigeration system.

[0027] Figure 9 A schematic diagram of the refrigerant inlet and outlet pipe connections of the refrigeration unit in a busbar circulating refrigeration system is shown.

[0028] Figure 10 A schematic diagram of the first piping group connection of the busbar circulating refrigeration system is shown.

[0029] Figure 11A schematic diagram of the second piping group connection of the busbar circulation refrigeration system is shown. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0031] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0032] Reference Figures 1 to 11 This embodiment provides a busbar trunking circulating cooling system, which includes: at least two sets of busbar trunking 100, at least one connector assembly 200, and at least one cooling device 300; a first cooling guide plate 102 is provided in the middle of the busbar group 101 in the busbar trunking 100. The first cooling guide plate 102 also has a grounding function and serves as the grounding phase of the busbar trunking. The busbar groups 101 distributed on both sides are the other two phases of the three phases A, B, and C, and the three together constitute a complete three-phase power supply and grounding system.

[0033] Among them, auxiliary plates are symmetrically fixed on both sides of the first cooling guide plate 102, and side shell plates are symmetrically and vertically fixed on the first cooling guide plate 102. The first cooling guide plate 102 is connected to the side shell plate through the connecting boss fixed at its top end, and a storage gap is formed between the connecting bosses at both ends. The stacking thickness of the busbar group 101 is equal to the gap depth of the storage gap.

[0034] The connecting boss is a stainless steel protrusion integrally formed with the first cooling guide plate 102. It is fixed to the side shell plate by laser welding, and the welding strength reaches more than 50MPa. The design of the busbar assembly 101 with equal stacking thickness and gap depth can ensure that the upper and lower surfaces of the busbar are in close contact with the first cooling guide plate 102 and the connecting boss respectively, avoiding poor contact caused by vibration and ensuring stable heat transfer efficiency.

[0035] The first cooling guide plate 102, the connecting boss and the auxiliary plate form a storage gap for the sealed busbar assembly 101.

[0036] The first cooling guide plate 102 and the auxiliary plate are both integrally formed from high thermal conductivity aluminum alloy. The width of the storage gap is designed according to the specifications of the busbar assembly 101, which not only ensures that the busbar assembly 101 can be stably embedded without shaking, but also leaves a small space of 0.5 to 1 mm for heat dissipation. At the same time, the mating surface between the auxiliary plate and the first cooling guide plate 102 is provided with a high temperature resistant silicone rubber sealing gasket to ensure the sealing performance of the storage gap and prevent external dust and moisture from entering and affecting the insulation performance of the busbar.

[0037] The first cooling guide plate 102 is isolated from the two working phase busbar groups 101 by an insulating thermally conductive pad, which ensures electrical insulation performance and enables efficient heat conduction. The first cooling guide plate 102 has a first flow channel group A, which can simultaneously provide precise liquid cooling to the two working phase busbars and its own grounding phase guide plate.

[0038] Among them, the bus trunking 100 is symmetrically provided with a second flow channel group B in the side wall that is in direct contact with the air. That is, the second flow channel group B is provided in the auxiliary plates on both sides. The second flow channel group B and the first flow channel group A form a three-dimensional heat dissipation layout of "three-phase core area + side wall auxiliary area". The side wall can also enhance heat dissipation by means of natural air convection, thereby improving the overall heat dissipation redundancy of the system.

[0039] The connector assembly 200 is used to realize the mechanical connection, electrical conduction and grounding continuity of adjacent busbar trunking 100. The second cooling guide plate 201 symmetrically arranged inside is made of high thermal conductivity copper alloy and the surface is precision polished to improve the fit. The second cooling guide plate 201 has a third flow channel group C. The working phase and grounding phase of the same phase busbar group 101 are covered on both sides of the corresponding second cooling guide plate 201, so that the concentrated heat at the connector can be transferred bidirectionally to the flow channel for efficient dissipation, while ensuring the electrical reliability of the three-phase connection.

[0040] Specifically, the connector assembly 200 also includes two sets of connectors, symmetrically arranged plugs, and protective side plates. The protective side plates are symmetrically arranged, and the connectors are symmetrically arranged between the protective side plates. The second cooling guide plate 201 separates individual connectors, forming a symmetrically arranged first gap within each connector. A second gap is formed between the two connectors. The first cooling guide plate 102, i.e., the grounding bar, is fixedly inserted into the second gap. The gap size matches the grounding bar to ensure reliable grounding. A third gap is formed between the connectors and the protective side plates. The busbar protection plate is fixedly inserted into the third gap. The insertion and cooperation between the busbar protection plate and the third gap serves both as protection and auxiliary fixing.

[0041] The insert rod enters through one protective side plate, passes through the connector and the second cooling guide plate 201, and exits through the other protective side plate.

[0042] The insert rod is fixedly sleeved with an insulating sleeve made of high voltage and high temperature resistant material to prevent leakage. The insert rods at both ends of the insulating sleeve are also fixedly sleeved with insulating blocks. The insulating blocks are axially positioned to prevent the components from shifting. The connector and the second cooling guide plate 201 are sleeved on the outside of the insulating sleeve, and the protective side plate is sleeved on the outside of the insulating blocks.

[0043] The outer wall of the protective side plate has a fixing groove, and washers are symmetrically arranged in the fixing groove. The washers are made of elastic metal material to buffer vibration. The fixing groove can limit the washers and prevent slippage. The washers are fixedly sleeved on the outside of the plug rod.

[0044] One end of the insert rod is fixed with an abutment block, and the outer wall of the washer on this side abuts against the abutment block. The other end of the insert rod is threaded with a square nut, which can prevent rotation. The outer wall of the washer on this side abuts against the square nut. The components are tightly fitted by bidirectional compression.

[0045] The refrigeration unit 300 adopts an industrial-grade high-efficiency refrigeration unit, which has the function of dynamically adjusting the refrigerant output temperature and flow rate according to the system heat load, and is adapted to the load fluctuation characteristics of the three-phase bus trunking. The refrigerant outlet of the refrigeration unit 300 is connected to the first flow channel group A in the adjacent bus trunking 100 through the first pipeline group 301, giving priority to cooling the core heat-generating area of ​​the three phases. The refrigerant inlet of the refrigeration unit 300 is connected to the second flow channel group B in the adjacent busbar group 101 and the third flow channel group C in the connector assembly 200 through the second pipeline group 302, realizing the centralized recovery and recycling of refrigerant in the auxiliary heat dissipation area.

[0046] Among them, the first flow channel group A, through which the refrigerant finally flows, is connected to the second flow channel group B via the third pipeline group 303, forming a complete closed-loop circulation channel of "refrigeration unit - first flow channel group A - second flow channel group B and third flow channel group C - refrigeration unit 300", ensuring that the refrigerant flows efficiently without dead zones throughout the entire chain.

[0047] The first flow channel group A is arranged along the extension direction of the bus trunking 100 and is completely matched with the heat extension trajectory of the three-phase busbar, including the grounded phase. It includes a first cooling channel group A1 and a second cooling channel group A2 arranged symmetrically. The first cooling channel group A1 corresponds to the heat dissipation area of ​​the working phase busbar on one side, and the second cooling channel group A2 corresponds to the heat dissipation area of ​​the working phase busbar on the other side. The two cooling channels are symmetrically distributed around the central axis of the grounded phase first cooling guide plate 102, and the ends of both ends intersect with the two ends of the bus trunking 100 respectively, ensuring that the heat dissipation covers the entire length of the three-phase busbar without omission.

[0048] A buffer channel A3 is provided between the first cooling channel group A1 and the second cooling channel group A2. The buffer channel A3 is composed of two side partitions. The two partitions serve as part of the cavity walls of the first cooling channel group A1 and the second cooling channel group A2, respectively. The buffer channel A3 is a hollow cavity structure located at the central axis of the grounding phase first cooling guide plate 102. It is integrally formed with the two cooling channel groups, which not only achieves physical isolation between the two cooling channels to prevent refrigerant crossflow and uneven heat dissipation of the working phases on both sides, but also enhances the overall structural rigidity of the grounding phase guide plate to avoid deformation of the flow channel due to refrigerant pressure. At the same time, it provides stable structural support for the grounding phase and ensures grounding continuity.

[0049] The partition is a thin aluminum alloy plate, and the width of the buffer channel A3 is 2-3 mm. It can absorb the thermal expansion caused by temperature changes between the first cooling guide plate 102, the first cooling channel group A1, and the second cooling channel group A2, so as to avoid channel deformation or cracking, and at the same time reduce thermal interference between adjacent channels.

[0050] The first cooling channel group A1 includes a first refrigerant channel A11 and a second refrigerant channel A12. The first refrigerant channel A11 includes a first horizontal flow channel A111, and the second refrigerant channel A12 includes a second horizontal flow channel A121, a rotary flow channel A122, and a third horizontal flow channel A123.

[0051] Among them, the second horizontal flow channel A121 is symmetrically overlapped and separated at both ends of the first horizontal flow channel A111, and the third horizontal flow channel A123 is parallel and separated between the first horizontal flow channel A111 and the buffer channel A; the rotary flow channel A122 adopts an arc transition design to reduce the refrigerant flow resistance, and connects the two ends of the second refrigerant channel A12 and the third horizontal flow channel A123 to form a "dual parallel + detour extension" flow channel pattern, which not only focuses on ensuring the core heat dissipation needs of the working phase busbar, but also takes into account the heat dissipation of the ground phase guide plate, and extends the overall heat exchange time of the refrigerant.

[0052] Specifically, the first horizontal flow channel A111 has a straight cavity structure to ensure rapid flow of coolant; the second horizontal flow channel A121 overlaps with the first horizontal flow channel A111 at both ends, shortening the path for coolant to enter the flow channel; the rotary flow channel A122 has an arc-shaped cavity to achieve smooth turning of the coolant; the third horizontal flow channel A123 is parallel to the first horizontal flow channel A111 and can cover the areas of the first refrigerant channel A11 and the second refrigerant channel A12 that are far from the inlet and outlet, avoiding heat dissipation dead zones.

[0053] The outer walls of the two busbar troughs 100 adjacent to the second flow channel group B are provided with inlet and outlet troughs. The first connector assembly 103 and the second connector assembly 104 are symmetrically fixed on the inlet and outlet troughs. Both are made of high-strength stainless steel and have corrosion resistance and impact resistance, providing stable support for pipeline connection.

[0054] The first connector assembly 103 is symmetrically fixed with a first inlet pipe 103a and a second inlet pipe 103b, and the second connector assembly 104 is symmetrically fixed with a first outlet pipe 104a and a second outlet pipe 104b. All pipe openings adopt standardized quick-connect interfaces and are equipped with low-temperature resistant sealing rings, which facilitates quick installation and effectively prevents refrigerant leakage.

[0055] Both the first connector assembly 103 and the second connector assembly 104 include a first cover plate and a second cover plate, which are sealed on the inlet groove and the outlet groove. The first cover plate and the second cover plate are made of stainless steel and are fixed to the side shell plate by bolts. Anaerobic sealant is applied to the connection to improve long-term sealing reliability.

[0056] Both the inlet and outlet channels include a connection port and a flow through port. The diameter of the connection port is larger than that of the flow through port, forming a stepped connection platform at the junction. The connection platform can position the first cover plate and the second cover plate, while increasing the contact area between the cover plate and the channel body and enhancing the sealing effect.

[0057] Both the first cover plate and the second cover plate include a flow channel sealing plate and an isolation boss fixed at its bottom end. The first inlet pipe 103a and the second inlet pipe 103b are symmetrically fixed at the top of the flow channel sealing plate of the first cover plate, and the first outlet pipe 104a and the second outlet pipe 104b are symmetrically fixed at the top of the flow channel sealing plate of the second cover plate.

[0058] Furthermore, the dimensions of the flow channel sealing plate match the connection port, and the dimensions of the isolation boss match the flow through port. After insertion, it can separate the internal space of the flow through port to prevent coolant from flowing between different flow channels. Both the inlet and outlet pipes use standard threaded interfaces, which facilitates quick connection with external pipelines. The pipe body and the flow channel sealing plate are welded to ensure no leakage.

[0059] A first diverter plate is fixed at the center of the bottom end of the isolation boss on the first cover plate, and a second diverter plate is fixed at the center of the bottom end of the isolation boss on the second cover plate. Both the first and second diverter plates are thin metal plates that can evenly distribute the coolant introduced by the inlet and outlet pipes to the corresponding flow chambers and then evenly discharge it, avoiding uneven heat dissipation caused by local flow concentration; the diverter plates and the isolation boss are integrally formed.

[0060] The flow channel sealing plate is fixed on the connecting platform and seals the connection port. The isolation boss is fixed inside the flow port and separates the flow port. The flow ports on both sides are connected to the corresponding inlet and outlet pipes respectively.

[0061] The contact surface between the flow channel sealing plate and the connecting platform is provided with a sealing groove and a built-in fluororubber sealing ring to achieve a complete seal at the connection port; the isolation boss separates the two channels formed after the flow port, which correspond to the first refrigerant channel A11 and the second refrigerant channel A12 respectively, to ensure that the coolant enters the different flow chambers for circulation as needed.

[0062] The first inlet pipe 103a and the first outlet pipe 104a are symmetrical, and the second inlet pipe 103b and the second outlet pipe 104b are symmetrically arranged. The symmetrical layout can ensure that the flow path length of the coolant in the flow channel is consistent, avoiding uneven heat dissipation caused by path differences; at the same time, the symmetrical design facilitates the modular splicing of the busbar trunking, and the pipe interface positions on the left and right sides are unified, reducing the difficulty of pipe layout when connecting multiple busbar trunking sections.

[0063] The first and second distributor plates are movably inserted into the first refrigerant channel A11 and the second refrigerant channel A12. A flow equalization plate is fixed within the first and second refrigerant channels A11 and A12, parallel to their extension direction. The first and second distributor plates abut and seal against the flow equalization plate. The movable insertion design facilitates disassembly of the distributor plates for cleaning the flow channels during later maintenance. The flow equalization plate is a strip-shaped aluminum alloy plate, fixed in the middle of the distribution cavity by welding. The seal at the abutment point with the distributor plate uses an elastic sealing gasket to accommodate assembly errors and ensure no coolant cross-flow.

[0064] The length of the flow equalization plate is greater than the maximum distance between the inlet and outlet channels, and the distance between the flow equalization plate and the top and bottom inner walls of the flow distribution cavity is equal. The design of equal distance from the inner wall can make the cross-sectional area of ​​the first flow cavity and the second flow cavity the same, ensuring that the flow rates of the two fluids are consistent and further improving the heat dissipation uniformity.

[0065] At the turning inner wall positions of the first refrigerant channel A11 and the second refrigerant channel A12, rounded chamfers are applied. The purpose of the rounded chamfer is to reduce the local resistance loss of the coolant when it turns or enters or exits the manifold, avoid turbulent noise, and protect the inner wall of the channel from fluid impact and wear. The inner arc surface of the rounded chamfer is smoothly connected to the inner wall of the channel to ensure smooth fluid flow.

[0066] In this scheme, the coolant circulation path is clearly defined: the first path enters the first horizontal flow channel A111 from the first inlet pipe 103a, absorbs heat, and then flows out from the first outlet pipe 104a; the second path enters the second horizontal flow channel A121 at one end from the second inlet pipe 103b, turns through the rotary flow channel A122 to enter the third horizontal flow channel A123, continues to absorb heat, and then flows into the second outlet pipe 104b from the second horizontal flow channel A121 at the other end before flowing out further.

[0067] The dual-circuit independent circulation can flexibly adjust the single-circuit or dual-circuit operation according to the heat generation power of the busbar group 101, taking into account both heat dissipation efficiency and energy saving requirements.

[0068] In summary, the first inlet pipe 103a and the first outlet pipe 104a are fixed to the refrigerant inlet and outlet of the second horizontal flow channel A121, and the second inlet pipe 103b and the second outlet pipe 104b are fixed to the refrigerant inlet and outlet of the first horizontal flow channel A111, so as to realize independent liquid supply and return control of different flow channels in the first flow channel group A, and the refrigerant distribution can be adjusted according to the load difference of the working phases on both sides.

[0069] Furthermore, the second flow channel group B is symmetrically fixed with a third inlet pipe 105 and a third outlet pipe 106 on the outer walls of the corresponding two ends of the busbar 100. The third inlet pipe 105 and the third outlet pipe 106 are located on the side walls of the busbar 100 near the first connector assembly 103 and the second connector assembly 104, respectively. The interface specifications are the same as those of the first inlet pipe 103a, which facilitates standardized pipeline connection and reduces spare parts management costs.

[0070] Furthermore, the second cooling guide plate 201 is fixed with a fourth inlet pipe 201a and a fourth outlet pipe 201b at both ends. The three are welded and sealed to prevent refrigerant leakage. The fourth inlet pipe 201a and the fourth outlet pipe 201b are fixed to the first and second ends of the second cooling guide plate 201 respectively.

[0071] The third flow channel group C includes a symmetrically arranged third refrigerant channel C1 and fourth refrigerant channel C2. Both the third refrigerant channel C1 and the fourth refrigerant channel C2 adopt a constant cross-section flow channel design to ensure that the refrigerant flows at a uniform velocity in the channel and avoids insufficient local heat exchange. The first end and the second end correspond to the ends of the third refrigerant channel C1 and the fourth refrigerant channel C2.

[0072] The second cooling guide plate 201 is symmetrically provided with a first cooling zone and a second cooling zone. The first cooling zone and the second cooling zone correspond to the busbar plug-in positions on both sides, and both ends of the first cooling zone and the second cooling zone intersect with the first end and the second end.

[0073] The third refrigerant channel C1 and the fourth refrigerant channel C2 are respectively located in the first cooling zone and the second cooling zone. A connecting refrigerant channel C3 is opened in the second guide pipe, and the connecting refrigerant channel C3 connects the third refrigerant channel C1 and the fourth refrigerant channel C2.

[0074] Furthermore, the number of third refrigerant channels C1 and fourth refrigerant channels C2 is equal, and the scheme provides two implementation schemes: one is a single set of channels that completely covers the cooling area, and the other is multiple sets of parallel channels that are evenly distributed in the cooling area.

[0075] Specifically, at least one set of the third refrigerant channel C1 and the fourth refrigerant channel C2 are provided.

[0076] If there is more than one set of the third refrigerant channel C1 and the fourth refrigerant channel C2, the number of the third refrigerant channel C1 and the fourth refrigerant channel C2 shall be the same and they shall be evenly distributed along the height of the side wall of the busbar trunking to ensure the heat dissipation uniformity of the two sides of the busbar trunking and the corresponding area of ​​the three-phase busbar, and avoid the problem of accelerated insulation aging caused by local heat dissipation imbalance.

[0077] Among them, the third refrigerant channel C1 and the fourth refrigerant channel C2 correspond to the conductor heating area of ​​the busbar group 101 in the connection area on both sides of the cover joint assembly 200, and specifically enhance the heat dissipation capacity of the busbar trunking connection part - this area is prone to heat concentration due to contact resistance, and the connection temperature can be effectively controlled by the flow channel to ensure the electrical stability of the three-phase connection.

[0078] The third refrigerant channel C1 and the fourth refrigerant channel C2 are connected at one end by the refrigerant channel C3 to form a "U-shaped" circulation path to extend the residence time of the refrigerant in the side wall channel and improve heat exchange efficiency; the other end of the fourth inlet pipe 201a and the fourth outlet pipe 201b adopts the same standardized design as other pipes to ensure the uniformity of system interfaces and facilitate future maintenance and replacement.

[0079] Furthermore, the refrigeration unit 300 is equipped with a refrigerant outlet 304 and a refrigerant recovery outlet 305. Both the outlet and the recovery outlet are equipped with pressure and temperature sensors, which can monitor the operating parameters of the circulation system in real time and provide data support for the adjustment of the cooling capacity. The initial delivery pipe 301a of the first pipeline group 301 connects the refrigerant outlet 304 with the first inlet pipe 103a and the second inlet pipe 103b. The initial delivery pipe 301a is equipped with an electromagnetic diverter valve, which can automatically adjust the refrigerant distribution ratio according to the temperature feedback of the working phases on both sides.

[0080] Furthermore, the end return pipe 302a of the second pipeline group 302 is connected to the refrigerant recovery port 305 and the third outlet pipe 106. The end return pipe 302a is equipped with a manifold valve to facilitate the centralized return of refrigerant from multiple branches.

[0081] The first pipeline group 301 also includes an intermediate connecting pipe 301b, which includes a first connecting pipe 301b-1 and a second connecting pipe 301b-2. The first connecting pipe 301b-1 connects the first outlet pipe 104a and the second inlet pipe 103b in two adjacent busbar trunking groups 100. The second connecting pipe 301b-2 connects the second outlet pipe 104b and the first inlet pipe 103a in two adjacent busbar trunking groups 100. The series liquid supply of the first flow channel group of the adjacent busbar trunking is realized through staggered connection, so as to ensure the continuity of heat dissipation of the three-phase busbar.

[0082] The second pipeline group 302 also includes a return flow coupling 302b, which includes a straight pipe 302b-1, a first interactive pipe 302b-2, and a second interactive pipe 302b-3. The straight pipe 302b-1 is located on one side of the bus trunking 100, and the first interactive pipe 302b-2 and the second interactive pipe 302b-3 are located on the other side of the bus trunking 100. The separate side layout can effectively avoid pipeline interference and improve the utilization rate of the bus trunking installation space.

[0083] Among them, the straight pipe 302b-1 connects the third inlet pipe 105 and the third outlet pipe 106 on one side of the two adjacent busbar trunking 100s; on the other side, the first interactive pipe 302b-2 connects the third outlet pipe 106 of the previous group and all the fourth inlet pipes 201a of the second cooling guide plate 201, so that the refrigerant in the side wall flow channel of the previous group can continue to dissipate heat for the joint assembly, realizing the cascade utilization of refrigerant waste heat; and the second interactive pipe 302b-3 connects all the fourth outlet pipes 201b and the third inlet pipe 105 in the next group of busbar trunking 100, further extending the refrigerant heat exchange link and improving energy utilization.

[0084] Two sets of third pipeline groups 303 are provided on the busbar trunking 100 through which the refrigerant last flows. One set of third pipeline groups 303 connects the first outlet pipe 104a and the second outlet pipe 104b on one side with the third inlet pipe 105 on one side. The other set of third pipeline groups 303 connects the first outlet pipe 104a and the second outlet pipe 104b on the other side with the third inlet pipe 105 on the other side. This ensures that the refrigerant after heat dissipation for the working phase and the ground phase on both sides in the last set of busbar trunking 100 can be completely introduced into the side wall flow channel, maximizing the refrigerant utilization rate and ensuring the balance of three-phase heat dissipation.

[0085] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A busway circuit refrigeration system characterized by: include, At least two sets of busbar trunking (100), wherein a first cooling guide plate (102) is provided in the middle of the busbar group (101) in the busbar trunking (100), and a first flow channel group (A) is opened in the first cooling guide plate (102); The busbar trunking (100) is provided with a second flow channel group (B) symmetrically arranged in the side wall that is in direct contact with the air. The connector assembly (200) is used to connect adjacent busbar trunking (100). A third flow channel group (C) is opened in the second cooling guide plate (201) symmetrically arranged inside it. The same phase busbar group (101) covers both sides of the second cooling guide plate (201). The refrigeration device (300) has a refrigerant outlet connected to a first flow channel group (A) in an adjacent busbar trunking (100) via a first pipeline group (301), and a refrigerant inlet connected to a second flow channel group (B) in an adjacent busbar group (101) and a third flow channel group (C) in a connector assembly (200) via a second pipeline group (302). Among them, the first flow channel group (A) through which the refrigerant finally flows is connected to the second flow channel group (B) through the third pipeline group (303) to form a circulation channel; The first flow channel group (A) is arranged along the extension direction of the busbar trunking (100), including a first cooling channel group (A1) and a second cooling channel group (A2) arranged symmetrically. The ends of the first cooling channel group (A1) and the second cooling channel group (A2) respectively intersect with the two ends of the busbar trunking (100). A buffer channel (A3) is provided to isolate the first cooling channel group (A1) and the second cooling channel group (A2). The first cooling channel group (A1) includes a first refrigerant channel (A11) and a second refrigerant channel (A12). The first refrigerant channel (A11) includes a first horizontal flow channel (A111), and the second refrigerant channel (A12) includes a second horizontal flow channel (A121), a rotary flow channel (A122), and a third horizontal flow channel (A123). The second horizontal flow channel (A121) is symmetrically overlapped and separated at both ends of the first horizontal flow channel (A111), the third horizontal flow channel (A123) is parallel and separated between the first horizontal flow channel (A111) and the buffer channel (A3), and the rotary flow channel (A122) connects the second refrigerant channel (A12) and the third horizontal flow channel (A123) at both ends.

2. The busway hydronic refrigerant system of claim 1, wherein: On the outer walls of the two busbar troughs (100) adjacent to the second flow channel group (B), a first connector assembly (103) and a second connector assembly (104) are symmetrically fixed. A first inlet pipe (103a) and a second inlet pipe (103b) are symmetrically fixed on the first connector assembly (103), and a first outlet pipe (104a) and a second outlet pipe (104b) are symmetrically fixed on the second connector assembly (104). The first inlet pipe (103a) and the first outlet pipe (104a) are fixed to the refrigerant inlet and outlet of the second advection channel (A121), and the second inlet pipe (103b) and the second outlet pipe (104b) are fixed to the refrigerant inlet and outlet of the first advection channel (A111).

3. The bus trunking circulating cooling system according to claim 2, characterized in that: The second flow channel group (B) is also symmetrically fixed with a third inlet pipe (105) and a third outlet pipe (106) on the outer walls of the corresponding busbar trough (100) at both ends. The third inlet pipe (105) and the third outlet pipe (106) are respectively located on the side walls of the busbar trough (100) near the first connector assembly (103) and the second connector assembly (104).

4. The bus trunking circulating cooling system according to any one of claims 1 to 3, characterized in that: The third flow channel group (C) includes a third refrigerant channel (C1) and a fourth refrigerant channel (C2) arranged symmetrically, wherein the third refrigerant channel (C1) is... Both the third refrigerant channel (C1) and the fourth refrigerant channel (C2) are provided with at least one set; If the third refrigerant channel (C1) and the fourth refrigerant channel (C2) are provided in more than one set, then the number of third refrigerant channels (C1) and fourth refrigerant channels (C2) is the same. The third refrigerant channel (C1) and the fourth refrigerant channel (C2) correspond to the conductor heating area of ​​the busbar group (101) in the connection area on both sides of the cover connector assembly (200).

5. The bus trunking circulating cooling system according to claim 4, characterized in that: The third refrigerant channel (C1) and the fourth refrigerant channel (C2) are connected at one end by a connecting refrigerant channel (C3), and the second cooling guide plate (201) at the other end is respectively fixedly connected to the fourth inlet pipe (201a) and the fourth outlet pipe (201b).

6. The bus trunking circulating cooling system according to any one of claims 1 to 3 and 5, characterized in that: The refrigeration device (300) is provided with a refrigerant outlet (304) and a refrigerant recovery outlet (305). The initial delivery pipe (301a) of the first pipeline group (301) is connected to the refrigerant outlet (304) and the first inlet pipe (103a) and the second inlet pipe (103b). The end return pipe (302a) of the second pipeline group (302) is connected to the refrigerant recovery outlet (305) and the third outlet pipe (106).

7. The bus trunking circulating cooling system according to claim 6, characterized in that: The first pipeline group (301) further includes an intermediate connecting pipe (301b), which includes a first connecting pipe (301b-1) and a second connecting pipe (301b-2). The first connecting pipe (301b-1) connects the first outlet pipe (104a) and the second inlet pipe (103b) in two adjacent busbar trunking groups (100), and the second connecting pipe (301b-2) connects the second outlet pipe (104b) and the first inlet pipe (103a) in two adjacent busbar trunking groups (100).

8. The bus trunking circulating cooling system according to claim 7, characterized in that: The second pipeline group (302) further includes a return pipe (302b), which includes a straight pipe (302b-1), a first interactive pipe (302b-2), and a second interactive pipe (302b-3). The straight pipe (302b-1) is located on one side of the bus trunking (100), and the first interactive pipe (302b-2) and the second interactive pipe (302b-3) are located on the other side of the bus trunking (100). The straight pipe (302b-1) connects the third inlet pipe (105) and the third outlet pipe (106) on one side of two adjacent busbar trunking (100); on the other side, the first interactive pipe (302b-2) connects the third outlet pipe (106) of the previous group and all the fourth inlet pipes (201a) of the second cooling guide plate (201), and the second interactive pipe (302b-3) connects all the fourth outlet pipes (201b) and the third inlet pipe (105) in the next group of busbar trunking (100). The third pipeline group (303) is provided in two sets on the bus trunking (100) through which the refrigerant last flows. One set of the third pipeline group (303) connects the first outlet pipe (104a) and the second outlet pipe (104b) on one side with the third inlet pipe (105) on one side. The other set of the third pipeline group (303) connects the first outlet pipe (104a) and the second outlet pipe (104b) on the other side with the third inlet pipe (105) on the other side.

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