Bus duct circulation refrigeration system

Abstract

The invention relates to the technical field of heat dissipation of power distribution equipment, and mainly discloses a bus duct circulating refrigeration system which comprises at least two sets of bus ducts, first cooling guide plates are arranged in the bus ducts, and first flow channel sets are formed in the first cooling guide plates; a second flow channel group is also formed in the side wall of the bus duct; a third flow channel group is arranged in a second cooling guide plate of the joint assembly, and the busbar group wraps the two sides of the second cooling guide plate; a refrigerant outlet of the refrigeration device is communicated with the first flow channel group in the adjacent bus duct through a first pipeline group, and a refrigerant inlet is communicated with the second flow channel group in the adjacent busbar group and the third flow channel group in the joint assembly through a second pipeline group; according to the heat dissipation structure, the problems that in existing power distribution equipment, an existing heat dissipation structure is insufficient in coverage, and the heat concentration problem is particularly prominent are solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of heat dissipation of power distribution equipment, and in particular to a bus duct circulating refrigeration system. BACKGROUND

[0002] The existing bus duct heat dissipation excessively depends on the natural heat dissipation of the bus duct shell or external air cooling structure, and the heat dissipation design lacks integrated adaptation to the bus duct conductive main body and joint structure, resulting in poor heat conduction path.

[0003] The existing heat dissipation structure is insufficient in coverage, and the heat concentration problem is particularly prominent. Under a large current load, local overheating is prone to occur, which accelerates the aging of the insulation part and even causes safety hazards. At the same time, the existing heat dissipation structure lacks targeted thermal expansion adaptation design. Under the influence of temperature alternation in long-term operation, the shell and the internal structure are prone to deformation and misplacement, further blocking heat conduction, and may also cause sealing failure, dust intrusion and other chain failures.

[0004] In addition, the existing heat dissipation configuration is mostly of fixed specifications, and cannot be flexibly adjusted according to the heat dissipation requirements of different current loads. In addition, the external air cooling structure needs to occupy additional installation space, and the disassembly and maintenance process is complicated. The adaptability and operation convenience cannot meet the needs of complex scenes. SUMMARY

[0005] Therefore, the technical problem to be solved by the application is that the existing heat dissipation structure in the existing power distribution equipment lacks coverage, and the heat concentration problem is particularly prominent. In addition, it cannot be flexibly adjusted according to the heat dissipation requirements of different current loads. In addition, the external air cooling structure needs to occupy additional installation space, and the disassembly and maintenance process is complicated. The adaptability and operation convenience cannot meet the needs of complex scenes.

[0006] The above technical problems are solved by the following technical scheme: the application provides a bus duct circulating refrigeration system, which comprises at least two groups of bus ducts, a first cooling guide plate is arranged in the middle of the bus duct in the bus bar group, and a first flow channel group is formed in the first cooling guide plate; wherein a second flow channel group is also symmetrically formed in the side wall of the bus duct in direct contact with air; a joint assembly is used for connecting adjacent bus ducts, a second cooling guide plate is symmetrically arranged in the joint assembly, a third flow channel group is formed in the second cooling guide plate, and the same phase bus bar group is covered on both sides of the second cooling guide plate; a refrigeration device, a first pipe group is connected between the refrigeration device and the first flow channel group in the adjacent bus duct, a second pipe group is connected between the refrigeration device and the second flow channel group in the adjacent bus bar group and the third flow channel group in the joint assembly, and the last group of first flow channels is connected with the second flow channel group through a third pipe group to form a circulating channel.

[0007] In a preferred embodiment of the bus duct circulating refrigeration system: the first flow channel group is arranged along the extension direction of the bus duct, and includes a first cooling channel group and a second cooling channel group arranged symmetrically, both ends of the first cooling channel group and the second cooling channel group are respectively connected to both ends of the bus duct; and a buffer channel is arranged between the first cooling channel group and the second cooling channel group.

[0008] In a preferred embodiment of the bus duct circulating refrigeration system: the first cooling channel group includes a first refrigerant channel and a second refrigerant channel, the first refrigerant channel includes a first parallel flow channel, and the second refrigerant channel includes a second parallel flow channel, a rotary flow channel and a third parallel flow channel; the second parallel flow channels are arranged symmetrically and separately at both ends of the first parallel flow channel, the third parallel flow channels are arranged symmetrically and separately between the first parallel flow channel and the buffer channel, and the rotary flow channel is connected to both ends of the second refrigerant channel and the third parallel flow channel.

[0009] In a preferred embodiment of the bus duct circulating refrigeration system: first joint assemblies and second joint assemblies are symmetrically arranged on both sides of the outer wall of the bus duct adjacent to the second flow channel group, the first joint assemblies are symmetrically provided with first inlet pipes and second inlet pipes, and the second joint assemblies are symmetrically provided with first outlet pipes and second outlet pipes; the first inlet pipes and the first outlet pipes are fixed to the refrigerant inlets and outlets of the second parallel flow channels, and the second inlet pipes and the second outlet pipes are fixed to the refrigerant inlets and outlets of the first parallel flow channels.

[0010] In a preferred embodiment of the bus duct circulating refrigeration system: the second flow channel group is symmetrically provided with third inlet pipes and third outlet pipes on both ends of the outer wall of the bus duct, and the third inlet pipes and the third outlet pipes are respectively arranged on the two end walls of the bus duct close to the first joint assemblies and the second joint assemblies.

[0011] In a preferred embodiment of the bus duct circulating refrigeration system: the third flow channel group includes a third refrigerant channel and a fourth refrigerant channel arranged symmetrically, and the third refrigerant channel and the fourth refrigerant channel are each provided with at least one group; if the third refrigerant channel and the fourth refrigerant channel are provided with more than one group, the third refrigerant channel and the fourth refrigerant channel are provided with the same number of groups; and the third refrigerant channel and the fourth refrigerant channel correspond to the conductor heating areas of the bus bar groups in the connection areas on both sides of the joint assemblies.

[0012] In a preferred embodiment of the bus duct circulating refrigeration system: one end of the third refrigerant channel and the fourth refrigerant channel is connected through a butt joint refrigerant channel, and the fourth inlet pipes and the fourth outlet pipes are respectively fixed and connected on the second cooling guide plates at the other end.

[0013] In a preferred embodiment of the bus duct circulating refrigeration system, the refrigeration device is provided with a refrigerant outlet and a refrigerant recovery port, the initial end delivery pipe of the first pipe group is connected with the refrigerant outlet, the first inlet pipe and the second inlet pipe, and the terminal return pipe of the second pipe group is connected with the refrigerant recovery port and the third outlet pipe.

[0014] In a preferred embodiment of the bus duct circulating refrigeration system, the first pipe group further comprises an intermediate connecting pipe, the intermediate connecting pipe comprises a first connecting pipe and a second connecting pipe, the first connecting pipe connects the first outlet pipe and the second inlet pipe in adjacent two groups of bus ducts, and the second connecting pipe connects the second outlet pipe and the first inlet pipe in adjacent two groups of bus ducts.

[0015] In a preferred embodiment of the bus duct circulating refrigeration system, the second pipe group further comprises a return connecting pipe, the return connecting pipe comprises a straight-through pipe, a first cross pipe and a second cross pipe, the straight-through pipe is located on one side of the bus duct, and the first cross pipe and the second cross pipe are located on the other side of the bus duct; wherein the straight-through pipe connects the third inlet pipe and the third outlet pipe on one side of adjacent two groups of bus ducts; on the other side, the first cross pipe connects the third outlet pipe of the previous group and all fourth inlet pipes of the second cooling guide plate, and the second cross pipe connects all fourth outlet pipes and the third inlet pipe in the next group of bus ducts; the third pipe group is arranged on the bus duct through which the refrigerant flows last, and one of the third pipe groups connects the first outlet pipe, the second outlet pipe and the third inlet pipe on one side, and the other third pipe group connects the first outlet pipe, the second outlet pipe and the third inlet pipe on the other side.

[0016] The present application has the following advantages: The first cooling guide plate has integrated design of grounding and cooling functions, and the insulating heat-conducting pad meets the dual requirements of electrical insulation and efficient heat conduction, thereby simplifying the overall structure and ensuring the reliability of the three-phase power supply and grounding system.

[0017] On this basis, the three-dimensional heat dissipation layout formed by the first flow channel group and the second flow channel group cooperates with the cladding heat dissipation of the second cooling guide plate on the three-phase busbar to accurately cover the core heating area and the joint heat concentration area, thereby solving the heat dissipation dead angle problem of the traditional scheme from the root.

[0018] And, the closed-loop circulation system is matched with the refrigerant cascade utilization design, the dynamic adjustment function of the electromagnetic shunt valve is combined, refrigeration energy efficiency and energy utilization rate are further improved, the balance of heat dissipation demand and energy saving target is realized, vibration buffering and sealing performance are effectively enhanced through the structure optimization of the connecting boss, the buffer channel and the elastic gasket, hidden dangers such as flow channel deformation and refrigerant leakage in long-term operation are avoided, and the service life of the system is prolonged. In addition to the standardized interface and modular design, it can be flexibly adapted to different current working conditions, greatly reducing the installation and maintenance difficulty, and significantly improving the reliability, stability and heat dissipation efficiency of the bus duct operation in the high-power scene. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but not limit the present application. Among them: Figure 1 The overall structure layout of the bus duct circulating refrigeration system is shown.

[0020] Figure 2 The bus duct and joint assembly connection layout of the bus duct circulating refrigeration system is shown.

[0021] Figure 3 The bus duct and joint assembly connection schematic diagram of the bus duct circulating refrigeration system is shown.

[0022] Figure 4 The first flow channel group distribution diagram of the bus duct circulating refrigeration system is shown.

[0023] Figure 5 The first cooling channel group and the second cooling channel group structure diagram of the bus duct circulating refrigeration system are shown.

[0024] Figure 6 The bus duct cross-sectional view of the bus duct circulating refrigeration system is shown.

[0025] Figure 7 The second flow channel group position schematic diagram of the bus duct circulating refrigeration system is shown.

[0026] Figure 8 The third flow channel group specific structure diagram of the bus duct circulating refrigeration system is shown.

[0027] Figure 9 The refrigeration device refrigerant inlet and outlet pipeline connection schematic diagram of the bus duct circulating refrigeration system is shown.

[0028] Figure 10 The first pipeline group connection schematic diagram of the bus duct circulating refrigeration system is shown.

[0029] Figure 11A second pipe group connection diagram of the bus duct circulating refrigeration system is shown. DETAILED DESCRIPTION

[0030] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and drawings.

[0031] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions about the present application, but the terms can be changed according to the intention of those skilled in the art, precedents, or new technology in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.

[0032] REFERENCE Figures 1-11 The present embodiment provides a bus duct circulating refrigeration system, which comprises at least two groups of bus ducts 100, at least one joint assembly 200, and at least one refrigeration device 300; the bus duct 100 is provided with a first cooling guide plate 102 in the middle of the bus bar group 101, the first cooling guide plate 102 has a grounding function and serves as a grounding phase of the bus duct, and the bus bar groups 101 distributed on both sides of the first cooling guide plate 102 are two other phases of the three-phase A, B, and C, which together constitute a complete three-phase power supply and grounding system.

[0033] Among them, the first cooling guide plate 102 is also symmetrically fixed with auxiliary plates on both sides, and the first cooling guide plate 102 is also symmetrically and vertically fixed with side shell plates, the first cooling guide plate 102 is connected with the side shell plates through the connecting bosses fixed at the top ends of the first cooling guide plate 102, and the storage gap is formed between the two end connecting bosses, and the stacking thickness of the bus bar 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, which is fixed with the side shell plate by laser welding, and the welding strength is above 50MPa; the design that the stacking thickness of the bus bar group 101 is equal to the gap depth can ensure that the upper and lower surfaces of the bus bar are in close contact with the first cooling guide plate 102 and the connecting boss respectively, avoid poor contact caused by vibration, and ensure stable heat transfer efficiency.

[0035] The first cooling guide plate 102, the connecting boss, and the auxiliary plate form a storage gap that seals the bus bar group 101.

[0036] The first cooling guide plate 102 and the auxiliary plate are integrally formed by using high-thermal-conductivity aluminum alloy material, the width of the storage gap is designed according to the specification of the busbar group 101, the busbar group 101 can be stably embedded and has no shaking, preferably, a small space of 0.5-1 mm is reserved for heat diffusion, meanwhile, the abutting surface of the auxiliary plate and the first cooling guide plate 102 is provided with a high-temperature-resistant silicone rubber sealing pad, so as to ensure the sealing performance of the storage gap and prevent external dust and water vapor from entering to affect the insulation performance of the busbar.

[0037] The first cooling guide plate 102 is isolated from the busbar groups 101 on both sides through an insulating heat-conducting pad, so as to ensure the electrical insulation performance and realize efficient heat conduction, the first cooling guide plate 102 is provided with a first flow channel group A, which can synchronously provide precise liquid cooling for the busbar groups on both sides and the ground-phase guide plate of the first cooling guide plate 102.

[0038] The second flow channel group B is symmetrically arranged in the sidewall of the bus duct 100 in direct contact with air, that is, the second flow channel group B is arranged 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 + sidewall auxiliary area”, the sidewall can simultaneously strengthen heat dissipation by means of air natural convection, and the overall heat dissipation redundancy of the system is improved.

[0039] The joint assembly 200 is used for realizing mechanical connection, electrical conduction and ground continuation of adjacent bus ducts 100, the second cooling guide plate 201 symmetrically arranged in the joint assembly 200 is made of high-thermal-conductivity copper alloy material, and the surface is precisely polished to improve the adhesion, the second cooling guide plate 201 is provided with a third flow channel group C, the working phase and the ground 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 joint can be bidirectionally transferred to the flow channel for efficient dissipation, and the electrical reliability of the three-phase connection is ensured.

[0040] Specifically, the joint assembly 200 further includes two groups of connecting pieces, symmetrically arranged insertion rod pieces and protective side plates, the protective side plates are symmetrically arranged, the connecting pieces are symmetrically arranged between the protective side plates, the second cooling guide plate 201 separates the single connecting piece, the first gap is symmetrically arranged in the single connecting piece, the second gap is formed between the connecting pieces on both sides, the first cooling guide plate 102, that is, the ground bar is fixedly inserted into the second gap, the size of the gap is matched with the ground bar, so as to ensure the ground reliability, the third gap is formed between the connecting pieces and the protective side plates, the protective plate of the bus duct is fixedly inserted into the third gap, and the insertion and cooperation of the protective plate of the bus duct and the third gap have the protection and auxiliary fixing effects.

[0041] The insertion rod piece penetrates one side protective side plate, passes through the connecting piece and the second cooling guide plate 201, and penetrates out of the other side protective side plate.

[0042] The high-voltage and high-temperature resistant material is used for the insulating sleeve fixed to the outer fixing sleeve of the plug rod part to prevent electric leakage. The insulating stopper is further fixed to the outer end of the plug rod part of the insulating sleeve, and the insulating stopper is axially positioned to avoid part deviation. The connecting piece and the second cooling guide plate 201 are sleeved outside the insulating sleeve, and the protective side plate is sleeved outside the insulating stopper.

[0043] The fixed groove is formed in the outer wall of the protective side plate, and the gasket is symmetrically arranged in the fixed groove. The gasket is made of elastic metal material to buffer vibration. The fixed groove can limit the gasket to prevent sliding. The gasket is fixedly sleeved outside the plug rod part.

[0044] The plug rod part is fixed with the abutting block at one end, and the outer wall of the gasket on this side abuts against the abutting block. A square nut is threadedly sleeved at the other end of the plug rod part, and the square nut can prevent self-rotation. The outer wall of the gasket on this side abuts against the square nut, and the components are tightly attached through bidirectional compression.

[0045] The refrigeration device 300 adopts an industrial-grade high-efficiency refrigeration unit, has the function of dynamically adjusting the refrigerant output temperature and flow according to the system heat load, and is suitable for the load fluctuation characteristics of the three-phase bus duct. The refrigeration device 300 is connected to the first flow channel group A in the adjacent bus duct 100 through the first pipe group 301 to preferentially supply cold to the three-phase core heating area. The refrigeration device 300 is connected to the second flow channel group B in the adjacent bus group 101 and the third flow channel group C in the joint assembly 200 through the second pipe group 302 to realize the centralized recovery and cyclic utilization of the refrigerant in the auxiliary heat dissipation area.

[0046] The last group of first flow channel groups A through which the refrigerant flows is connected to the second flow channel group B through the third pipe group 303 to form a complete closed loop circulation channel of “refrigeration device—first flow channel group A—second flow channel group B and third flow channel group C—refrigeration device 300”, ensuring that the refrigerant has no dead zone and efficient flow in the whole link.

[0047] The first flow channel group A is arranged along the extension direction of the bus duct 100 and completely matches the heating extension track of the three-phase bus and the ground phase, including the symmetrically arranged first cooling channel group A1 and the second cooling channel group A2. The first cooling channel group A1 corresponds to the heat dissipation area of the working phase bus on one side, and the second cooling channel group A2 corresponds to the heat dissipation area of the working phase bus on the other side. The two groups of cooling channels are symmetrically distributed with the center axis of the ground phase first cooling guide plate 102, and the two ends of the two groups of cooling channels respectively meet the two ends of the bus duct 100, so as to ensure that the heat dissipation covers the whole length of the three-phase bus 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 groups of partitions are respectively used as part of the cavity wall of the two groups of first cooling channel group A1 and second cooling channel group A2, the buffer channel A3 is a hollow cavity structure, is located at the central axis of the grounding phase first cooling guide plate 102, is integrally formed with the two groups of cooling channels, realizes physical isolation of the two groups of cooling channels, prevents refrigerant from flowing together to cause uneven heat dissipation of the two working phases, enhances the overall structural rigidity of the grounding phase guide plate, avoids deformation of the flow channel caused by refrigerant pressure, simultaneously provides stable structural support for the grounding phase, and guarantees the grounding continuity.

[0049] The partition is a thin aluminum alloy plate, the width of the buffer channel A3 is 2-3 mm, the thermal expansion amount of the first cooling guide plate 102 and the first cooling channel group A1 and the second cooling channel group A2 caused by temperature change can be absorbed, deformation or cracking of the flow channel is avoided, and thermal interference between adjacent flow channels is reduced.

[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 flat channel A111, the second refrigerant channel A12 includes a second flat channel A121, a rotary channel A122 and a third flat channel A123.

[0051] The second flat channel A121 is symmetrically and separately arranged at two ends of the first flat channel A111, and the third flat channel A123 is parallelly and separately arranged between the first flat channel A111 and the buffer channel A; the rotary channel A122 is designed in an arc shape to reduce refrigerant flow resistance, and is connected with the second refrigerant channel A12 and the third flat channel A123 at two ends to form a flow channel mode of “double parallel + detour extension”, which can not only guarantee the core heat dissipation demand of the working phase busbar but also can take into account the heat dissipation of the grounding phase guide plate, and prolong the overall heat exchange time of the refrigerant.

[0052] Specifically, the first flat channel A111 is a straight cavity structure to ensure rapid flow of the cooling liquid; the second flat channel A121 is coincided with the two ends of the first flat channel A111 to shorten the path of the cooling liquid into the flow channel; the rotary channel A122 is an arc cavity to realize smooth turning of the cooling liquid; and the third flat channel A123 is parallel to the first flat channel A111, can cover the area far away from the inlet and outlet of the first refrigerant channel A11 and the second refrigerant channel A12, and avoids the dead angle of heat dissipation.

[0053] The inlet groove and the outlet groove are provided on the outer wall of the bus duct 100 adjacent to the second flow channel group B, and the first joint assembly 103 and the second joint assembly 104 are symmetrically and fixedly arranged on the inlet groove and the outlet groove, the two are made of high-strength stainless steel material, have corrosion resistance and impact resistance, and provide stable support for pipeline connection.

[0054] The first joint assembly 103 is symmetrically fixed with a first inlet pipe 103a and a second inlet pipe 103b, and the second joint assembly 104 is symmetrically fixed with a first outlet pipe 104a and a second outlet pipe 104b. All the pipe openings are provided with standardized quick plug interfaces and equipped with low-temperature-resistant sealing rubber rings, so as to facilitate quick installation and effectively prevent refrigerant leakage.

[0055] The first joint assembly 103 and the second joint assembly 104 each 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 part to improve long-term sealing reliability.

[0056] The inlet groove and the outlet groove each include a connecting port and a flow-through port. The connecting port has a larger diameter than the flow-through port, and a stepped connecting platform is formed at the joint. The connecting platform can position the first cover plate and the second cover plate and increase the contact area between the cover plate and the groove body, thereby enhancing the sealing effect.

[0057] The first cover plate and the second cover plate each include a flow channel sealing plate and an isolation boss fixed to the bottom end thereof. The first inlet pipe 103a and the second inlet pipe 103b are symmetrically fixed to 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 to the top of the flow channel sealing plate of the second cover plate.

[0058] Further, the size of the flow channel sealing plate matches the connecting port, and the size of the isolation boss matches the flow-through port. After insertion, the isolation boss can separate the internal space of the flow-through port to prevent the cooling liquid in different flow channels from mixing. The inlet pipe and the outlet pipe are provided with standard threaded interfaces to facilitate quick connection with external pipelines. The pipe body and the flow channel sealing plate are fixed by welding to ensure no leakage.

[0059] A first flow distribution plate is fixed to the middle of the bottom end of the isolation boss of the first cover plate, and a second flow distribution plate is fixed to the middle of the bottom end of the isolation boss of the second cover plate. The first flow distribution plate and the second flow distribution plate are thin metal plates that can uniformly distribute the cooling liquid introduced by the inlet and outlet pipes to the corresponding flow cavities and then uniformly guide the cooling liquid out, thereby preventing uneven heat dissipation caused by local flow concentration. The flow distribution plate and the isolation boss are integrally formed.

[0060] The flow channel sealing plate is fixed on the connecting platform and seals the connecting port. The isolation boss is fixed in the flow-through port and separates the flow-through port. The two side-separated flow-through ports are respectively connected to the corresponding inlet and outlet pipes.

[0061] A sealing groove is provided on the contact surface of the flow channel sealing plate and the connecting platform, and a fluororubber sealing ring is arranged in the sealing groove to achieve complete sealing of the connecting port. The two channels formed after the isolation boss separates the flow-through port correspond to the first refrigerant channel A11 and the second refrigerant channel A12, respectively, to ensure that the cooling liquid enters different flow cavities 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 cooling liquid in the flow channel is consistent, and avoid uneven heat dissipation caused by path difference; at the same time, the symmetrical design facilitates the modular splicing of the bus duct, the pipe interface positions on the left and right sides are unified, and the pipe layout difficulty when connecting multiple bus ducts is reduced.

[0063] The first flow dividing plate and the second flow dividing plate are movably inserted into the first cooling medium channel A11 and the second cooling medium channel A12, and a flow uniforming plate is fixed in the first cooling medium channel A11 and the second cooling medium channel A12 parallel to the extension direction thereof, and the first flow dividing plate and the second flow dividing plate abut and seal with the flow uniforming plate. The movable insertion design facilitates the disassembly of the flow dividing plate for cleaning the flow channel during later maintenance; the flow uniforming plate is a strip-shaped aluminum alloy plate, which is fixed in the middle of the flow dividing cavity by welding, and the sealing at the abutting position of the flow dividing plate uses an elastic gasket, which can adapt to assembly errors and ensure that there is no cooling liquid flow mixing.

[0064] The length of the flow uniforming plate is greater than the maximum distance between the inlet groove and the outlet groove, and the distance of the flow uniforming plate from the inner walls of the top and bottom of the flow dividing cavity is equal. The equal distance from the inner walls design can make the cross-sectional areas of the first flow cavity and the second flow cavity the same, ensure the flow consistency of the two paths of fluid, and further improve the uniformity of heat dissipation.

[0065] The inner walls of the first cooling medium channel A11 and the second cooling medium channel A12 at the turning positions are chamfered with a circular arc. The circular arc reduces the local resistance loss of the cooling liquid when turning in the flow channel or entering and exiting the flow dividing plate, avoids generating turbulent noise, and protects the inner walls of the flow channel from being worn by fluid impact. The inner arc surface of the circular arc smoothly connects with the inner walls of the flow channel, ensuring smooth fluid flow.

[0066] In this scheme, the cooling liquid circulation path is clear: the first path enters the first flat flow channel A111 from the first inlet pipe 103a, and flows out from the first outlet pipe 104a after absorbing heat; the second path enters the one-end second flat flow channel A121 from the second inlet pipe 103b, turns into the third flat flow channel A123 through the turning flow channel A122, and further flows out from the other-end second flat flow channel A121 after further absorbing heat.

[0067] The double-path independent circulation can flexibly adjust single-path or double-path operation according to the heating power of the busbar group 101, and takes into account the heat dissipation efficiency and energy saving needs.

[0068] In summary, the first inlet pipe 103a and the first outlet pipe 104a are correspondingly fixed on the refrigerant inlets and outlets of the second parallel flow channel A121, and the second inlet pipe 103b and the second outlet pipe 104b are correspondingly fixed on the refrigerant inlets and outlets of the first parallel 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 amount can be adjusted according to the load difference of the two sides of the working phase.

[0069] Further, the second flow channel group B is also symmetrically fixed with the third inlet pipe 105 and the third outlet pipe 106 on the outer walls of the two ends of the bus duct 100, and the third inlet pipe 105 and the third outlet pipe 106 are respectively located on the two end walls of the bus duct 100 close to the first joint assembly 103 and the second joint assembly 104, and the interface specifications are unified with the first inlet pipe 103a, so as to facilitate standardized connection of the pipeline and reduce the management cost of spare parts.

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

[0071] The third flow channel group C includes symmetrically arranged third refrigerant channel C1 and fourth refrigerant channel C2, both of which are designed as equal-section flow channels to ensure uniform refrigerant flow rate in the flow channels and avoid insufficient local heat exchange.

[0072] The first cooling zone and the second cooling zone are symmetrically arranged on the second cooling guide plate 201, and correspond to the two side bus bar insertion positions respectively.

[0073] The third refrigerant channel C1 and the fourth refrigerant channel C2 are arranged in the first cooling zone and the second cooling zone respectively, and the second flow guide pipe is provided with a butt joint refrigerant channel C3.

[0074] Further, the third refrigerant channel C1 and the fourth refrigerant channel C2 are provided with an equal number, and two implementation schemes are provided: one is a single group of flow channels, which completely covers the cooling zone, and the other is a plurality of parallel flow channels, which are uniformly distributed in the cooling zone.

[0075] Specifically, the third refrigerant channel C1 and the fourth refrigerant channel C2 are each provided with at least one group.

[0076] If the third refrigerant channel C1 and the fourth refrigerant channel C2 are provided with more than one set, the third refrigerant channel C1 and the fourth refrigerant channel C2 are provided with the same number and are uniformly distributed along the height direction of the bus duct side wall, to ensure the uniformity of heat dissipation of the bus duct and the three-phase busbar in the corresponding area, and to avoid the problem of accelerated insulation aging caused by local heat dissipation imbalance.

[0077] 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 of the joint assembly 200 on both sides, and the heat dissipation capacity of the bus duct connection part is specifically strengthened. The area is prone to heat concentration due to contact resistance, and precise coverage of the flow channel can effectively control the joint temperature and 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 butt joint refrigerant channel C3 to form a "U-shaped" circulation path to prolong the residence time of the refrigerant in the side wall flow channel and improve the heat exchange efficiency. The other end of the fourth inlet pipe 201a and the fourth outlet pipe 201b is designed with a standardized design consistent with other pipelines to ensure the uniformity of the system interface and facilitate later maintenance and replacement.

[0079] Further, the refrigeration device 300 is provided with a refrigerant outlet 304 and a refrigerant recovery port 305. The outlet and the recovery port are both equipped with pressure and temperature sensors, which can monitor the operating parameters of the circulating system in real time and provide data support for refrigeration capacity adjustment. The initial end 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, and the initial end delivery pipe 301a is provided with an electromagnetic shunt valve, which can automatically adjust the refrigerant distribution ratio according to the temperature feedback of the two sides.

[0080] Further, the terminal return pipe 302a of the second pipeline group 302 connects the refrigerant recovery port 305 and the third outlet pipe 106, and the terminal return pipe 302a is provided with a flow valve to facilitate the centralized return of multiple branch refrigerants.

[0081] The first pipeline group 301 further includes an intermediate butt joint pipe 301b, which includes a first butt joint pipe 301b-1 and a second butt joint pipe 301b-2. The first butt joint pipe 301b-1 connects the first outlet pipe 104a and the second inlet pipe 103b in the adjacent two groups of bus ducts 100, and the second butt joint pipe 301b-2 connects the second outlet pipe 104b and the first inlet pipe 103a in the adjacent two groups of bus ducts 100. By means of staggered butt joint, the series liquid supply of the first flow channel group of the adjacent bus ducts is realized, and the continuity of the heat dissipation of the three-phase busbar is ensured.

[0082] The second pipeline group 302 further comprises a return butt joint pipe 302b, the return butt joint pipe 302b comprising a straight-through pipe 302b-1, a first interaction pipe 302b-2 and a second interaction pipe 302b-3, the straight-through pipe 302b-1 being located at one side of the bus duct 100, the first interaction pipe 302b-2 and the second interaction pipe 302b-3 being located at the other side of the bus duct 100, and the split-side layout can effectively avoid pipeline cross interference and improve the utilization rate of the bus duct installation space.

[0083] The straight-through pipe 302b-1 connects the third inlet pipe 105 and the third outlet pipe 106 at one side of the adjacent two groups of bus ducts 100, at the other side, the first interaction pipe 302b-2 connects the third outlet pipe 106 of the previous group and all fourth inlet pipes 201a of the second cooling guide plate 201, so that the coolant of the side wall flow channel of the previous group can continue to dissipate heat for the joint assembly, realizing the step-by-step utilization of the residual heat of the coolant; and the second interaction pipe 302b-3 connects all fourth outlet pipes 201b with the third inlet pipe 105 in the next group of bus ducts 100, further extending the coolant heat exchange link and improving the energy utilization rate.

[0084] The third pipeline group 303 is provided on the bus duct 100 through which the coolant flows last, one of the two groups of third pipeline groups 303 connects the first outlet pipe 104a, the second outlet pipe 104b and the third inlet pipe 105 at one side, and the other group of third pipeline groups 303 connects the first outlet pipe 104a, the second outlet pipe 104b and the third inlet pipe 105 at the other side, ensuring that the coolant after dissipating heat for the working phase and the grounding phase on both sides in the last group of bus ducts 100 can be completely introduced into the side wall flow channel, maximizing the utilization rate of the coolant, and at the same time, ensuring the balance of three-phase heat dissipation.

[0085] Finally, it should be noted that the above detailed description of the method and apparatus is only an embodiment, and those skilled in the art can modify the embodiment in different ways without departing from the scope of the present application.

Claims

1. A busway circuit refrigeration system characterized by: The utility model relates to a bus duct cooling system, comprising, At least two groups of bus ducts (100) are provided with first cooling guide plates (102) in the middle of bus bar groups (101), and first flow channel groups (A) are formed in the first cooling guide plates (102); Wherein, the sidewall of the bus duct (100) directly contacted with air is also provided with symmetrical second flow channel groups (B); A joint assembly (200) is used for connecting adjacent bus ducts (100), and a third flow channel group (C) is formed in the symmetrical second cooling guide plates (201) of the joint assembly (200), and the same phase bus bar group (101) is covered on both sides of the second cooling guide plates (201); A refrigeration device (300) is connected to the first flow channel groups (A) in the adjacent bus ducts (100) through a first pipe group (301), and the refrigeration device (300) is connected to the second flow channel groups (B) in the adjacent bus bar groups (101) and the third flow channel groups (C) in the joint assembly (200) through a second pipe group (302); Wherein, the last group of first flow channel groups (A) is connected to the second flow channel groups (B) through a third pipe group (303) to form a circulation channel.

2. The busway hydronic refrigerant system of claim 1, wherein: The first flow channel groups (A) are arranged along the extension direction of the bus ducts (100) and comprise symmetrical first cooling channel groups (A1) and second cooling channel groups (A2), and the two ends of the first cooling channel groups (A1) and the second cooling channel groups (A2) are respectively connected to the two ends of the bus ducts (100). The first cooling channel groups (A1) and the second cooling channel groups (A2) are provided with buffer channels (A3) therebetween.

3. The busway hydronic refrigerant system of claim 2, wherein: The first cooling channel groups (A1) comprise first refrigerant channels (A11) and second refrigerant channels (A12), the first refrigerant channels (A11) comprise first straight flow channels (A111), and the second refrigerant channels (A12) comprise second straight flow channels (A121), rotary flow channels (A122) and third straight flow channels (A123); Wherein, the second straight flow channels (A121) are symmetrically arranged at the two ends of the first straight flow channels (A111), the third straight flow channels (A123) are parallelly arranged between the first straight flow channels (A111) and the buffer channels (A3), and the rotary flow channels (A122) are connected to the two ends of the second refrigerant channels (A12) and the third straight flow channels (A123).

4. The busway hydronic refrigerant system of claim 3, wherein: First joint assemblies (103) and second joint assemblies (104) are symmetrically arranged on the outer walls of the two bus ducts (100) adjacent to the second flow channel groups (B), the first joint assemblies (103) are symmetrically provided with first inlet pipes (103a) and second inlet pipes (103b), and the second joint assemblies (104) are symmetrically provided with first outlet pipes (104a) and second outlet pipes (104b); The first inlet pipes (103a) and the first outlet pipes (104a) are correspondingly fixed to the refrigerant inlets and outlets of the second straight flow channels (A121), and the second inlet pipes (103b) and the second outlet pipes (104b) are correspondingly fixed to the refrigerant inlets and outlets of the first straight flow channels (A111).

5. The busway hydronic refrigerant system of claim 4, wherein: The second flow channel group (B) is also symmetrically fixed with a third inlet pipe (105) and a third outlet pipe (106) on the two end outer walls of the bus duct (100), and the third inlet pipe (105) and the third outlet pipe (106) are respectively located on the two end side walls of the bus duct (100) close to the first joint assembly (103) and the second joint assembly (104).

6. The busway hydronic refrigerant system according to any of claims 1-5, wherein: The third flow channel group (C) comprises a third refrigerant channel (C1) and a fourth refrigerant channel (C2) arranged symmetrically, and the third refrigerant channel (C1) is arranged on one side of the bus duct (100) and the fourth refrigerant channel (C2) is arranged on the other side of the bus duct (100). The third refrigerant channel (C1) and the fourth refrigerant channel (C2) are each provided with at least one group of refrigerant channels. If the third refrigerant channel (C1) and the fourth refrigerant channel (C2) are provided with more than one group of refrigerant channels, the third refrigerant channel (C1) and the fourth refrigerant channel (C2) are provided with the same number of groups of refrigerant channels. The third refrigerant channel (C1) and the fourth refrigerant channel (C2) correspond to the conductor heating area of the bus bar group (101) in the connection area on both sides of the joint assembly (200).

7. The busway hydronic refrigerant system of claim 6, wherein: The third refrigerant channel (C1) and the fourth refrigerant channel (C2) are connected by a butt joint refrigerant channel (C3) at one end, and the second cooling guide plate (201) at the other end is fixed with a fourth inlet pipe (201a) and a fourth outlet pipe (201b) respectively.

8. The busway hydronic refrigerant system according to any of claims 1-5 and 7, wherein: The refrigeration device (300) is provided with a refrigerant outlet (304) and a refrigerant recovery port (305), and the initial end delivery pipe (301a) of the first pipe group (301) connects the refrigerant outlet (304) with the first inlet pipe (103a) and the second inlet pipe (103b), and the terminal return pipe (302a) of the second pipe group (302) connects the refrigerant recovery port (305) with the third outlet pipe (106).

9. The busway hydronic refrigerant system of claim 8, wherein: The first pipe group (301) further comprises an intermediate butt joint pipe (301b), and the intermediate butt joint pipe (301b) comprises a first butt joint pipe (301b-1) and a second butt joint pipe (301b-2), the first butt joint pipe (301b-1) connects the first outlet pipe (104a) and the second inlet pipe (103b) in the adjacent two groups of bus ducts (100), and the second butt joint pipe (301b-2) connects the second outlet pipe (104b) and the first inlet pipe (103a) in the adjacent two groups of bus ducts (100).

10. The busway hydronic refrigerant system of claim 9, wherein: The second pipe group (302) further comprises a return butt joint pipe (302b), and the return butt joint pipe (302b) comprises a straight-through pipe (302b-1), a first interaction pipe (302b-2) and a second interaction pipe (302b-3), the straight-through pipe (302b-1) is located on one side of the bus duct (100), and the first interaction pipe (302b-2) and the second interaction pipe (302b-3) are located on the other side of the bus duct (100). Wherein, the straight-through pipe (302b-1) connects the third inlet pipe (105) and the third outlet pipe (106) on one side of the adjacent two groups of bus ducts (100); on the other side, the first interaction pipe (302b-2) connects the third outlet pipe (106) of the previous group and all fourth inlet pipes (201a) of the second cooling guide plate (201), and the second interaction pipe (302b-3) connects all fourth outlet pipes (201b) and the third inlet pipe (105) in the next group of bus ducts (100); The third pipe group (303) is provided on the bus duct (100) where the refrigerant finally flows, and is provided with two groups, one of which connects the first outlet pipe (104a), the second outlet pipe (104b) and the third inlet pipe (105) on one side, and the other of which connects the first outlet pipe (104a), the second outlet pipe (104b) and the third inlet pipe (105) on the other side.

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