Static transfer switch

Abstract

The application provides a static transfer switch, comprising a box body, a first air port and a second air port arranged at two ends of the box body in a first direction respectively; a radiator; a functional device in thermal contact with the radiator; a first connector; a first conductive row connected to the functional device and the first connector; a second connector spaced apart from the first connector in the first direction; a second conductive row connected to the functional device and the second connector; a fan assembly; and a current monitoring module located on a side of the radiator facing the second air port, the current monitoring module being connected to the second conductive row. The first conductive row establishes electrical connection between the first connector and the functional device on one side of the radiator, the second conductive row establishes electrical connection between the second connector and the functional device on the other side of the radiator, and the fan assembly and the current monitoring module are arranged on opposite sides of the radiator respectively, so that the element layout inside the box body is more reasonable and the space utilization is improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic energy storage equipment technology, and in particular to a static transfer switch. Background Technology

[0002] With the explosive growth of the global photovoltaic (PV) energy storage industry, the industry's requirements for the safety and reliability of PV energy storage systems are also increasing. Static transfer switches (STS) are one of the key components of PV energy storage systems. STS enable rapid switching between two independent power sources. When one power source fails (such as power outage, overvoltage, undervoltage, or frequency anomalies), the STS can quickly switch critical loads to the other power source, thereby ensuring equipment operation and data security, playing a crucial protective role for the PV energy storage system. At the same time, STS has advantages such as no mechanical wear and high reliability, reducing long-term maintenance costs. However, the internal component layout of STS in related technologies needs further optimization. Utility Model Content

[0003] In view of the above, it is necessary to provide a static changeover switch to solve the above-mentioned defects.

[0004] This application provides a static changeover switch, comprising: a housing having a receiving cavity, with a first air vent and a second air vent respectively disposed at both ends of the housing in a first direction; a heat sink disposed within the receiving cavity and located in the middle of the housing; a functional device disposed within the receiving cavity and thermally connected to the heat sink; a first connector disposed within the housing; a first conductive bus disposed within the receiving cavity and connected to the functional device and the first connector; a second connector disposed within the housing and spaced apart from the first connector along the first direction; a second conductive bus disposed within the receiving cavity and connected to the functional device and the second connector; a fan assembly disposed within the receiving cavity for providing cooling airflow to the heat sink and the functional device; and a current monitoring module disposed within the receiving cavity and located on the side of the heat sink facing the second air vent, the current monitoring module being connected to the second conductive bus.

[0005] In some embodiments, the side of the radiator facing the bottom wall of the housing has multiple fins, the fins are parallel to a first direction, and the multiple fins are spaced apart along a second direction, the second direction being perpendicular to the first direction; the functional device is fixed to the side of the radiator facing away from the bottom wall of the housing.

[0006] In some embodiments, the static changeover switch further includes a duct plate disposed within the accommodating cavity, and a flow guiding space is formed between the duct plate and the bottom wall of the housing, the flow guiding space being disposed directly opposite the fan assembly; in a first direction, the size of the flow guiding space gradually decreases from the fan assembly to the multiple fins.

[0007] In some embodiments, the first conductive bus has a first segment and a second segment, one end of the first segment is connected to a first connector, the other end of the first segment is connected to the second segment, and the end of the second segment away from the first segment is connected to a functional device; wherein, the first connector is located on the side of the housing in the second direction, and an angle is formed between the first segment and the second segment.

[0008] In some embodiments, the static changeover switch further includes a first support member disposed within the accommodating cavity. The first support member is located on the side of the radiator facing the first air vent. The first support member has a gap with the bottom wall of the housing. The first support member is provided with a first insulating post, and the connection between the first segment and the second segment is fixed to the first insulating post.

[0009] In some embodiments, a bent section is provided in the middle of the second conductive bus, and the height of the end of the second conductive bus near the second connector is lower than the height of the end of the second conductive bus near the functional device; the static changeover switch also includes a circuit board, which is disposed in the accommodating cavity and located above the end of the second conductive bus near the second connector.

[0010] In some embodiments, the second conductive bus has a first part and a second part, one end of the first part is connected to a second connector, the other end of the first part is connected to the second part, and the end of the second part away from the first part is connected to a functional device; wherein, the second connector is located on the side of the housing in a second direction, and an angle is formed between the first part and the second part; a bending section is provided in the middle of the second part, and the height of the first part and the second part near the end of the first part is less than the height of the second part away from the end of the first part.

[0011] In some embodiments, the static changeover switch further includes a second support member disposed within the accommodating cavity. The second support member is located on the side of the radiator facing the second air vent. The second support member has a gap with the bottom wall of the housing. The second support member is provided with a second insulating post, and the connection between the first part and the second part is fixed to the second insulating post.

[0012] In some embodiments, the current monitoring module is a Hall sensor, and the second part is inserted through one end of the first part into the Hall sensor and is clamped and fixed to the Hall sensor.

[0013] In some embodiments, the Hall sensor is provided with an insulating foot cup and an adjusting screw, the insulating foot cup being held against the second part, and the adjusting screw being used to adjust the position of the insulating foot cup.

[0014] In some embodiments, the housing is provided with handles on opposite sides in the second direction, the handles are recessed from the outside of the housing inward, and the two handles are respectively attached to opposite sides of the radiator.

[0015] The static transfer switch provided in this application establishes an electrical connection between a first connector and a functional device on one side of the heat sink via a first conductive busbar, and an electrical connection between a second connector and a functional device on the other side of the heat sink via a second conductive busbar. Furthermore, the fan assembly and current monitoring module are respectively arranged on opposite sides of the heat sink, resulting in a more rational layout of components inside the enclosure and improved space utilization. During actual operation, the heat generated by the functional device is conducted to the heat sink. At this time, the fan assembly starts working, forming an airflow between the first and second air inlets. That is, cold air from outside the enclosure can enter the enclosure through the first air inlet, pass through the heat sink in the first direction for heat exchange, and then the hot air can be discharged from the enclosure through the second air inlet, achieving rapid heat dissipation and improving the stability and safety of the equipment. Attached Figure Description

[0016] Figure 1 A schematic diagram of the appearance of the static changeover switch provided in this application.

[0017] Figure 2 A first perspective view of the internal components of the static changeover switch provided in this application.

[0018] Figure 3 A second perspective view of the internal components of the static changeover switch provided in this application.

[0019] Figure 4 A schematic diagram of the structure of the wind turbine assembly provided in this application.

[0020] Figure 5 A third perspective view of the internal components of the static changeover switch provided in this application.

[0021] Figure 6 A top view of the internal components of the static changeover switch provided in this application.

[0022] Figure 7 A schematic diagram showing the distribution of the first and second conductive busbars provided in this application.

[0023] Figure 8 This is a schematic diagram of the Hall sensor provided in this application.

[0024] Explanation of main component symbols 10. Housing; 11. Receiving cavity; 12. First air outlet; 13. Second air outlet; 14. Cover plate; 15. Bottom wall; 16. Handle; 17. Bracket; 18. First support member; 181. First insulating column; 19. Second support member; 191. Second insulating column; 20. Radiator; 21. Fins; 30. Functional devices; 31. Thyristors; 40. First connector; 41. First adapter terminal; 42. First external terminal; 50. First conductive busbar; 51. First segment; 52. Second segment; 60. Second connector; 61. Second adapter terminal; 62. Second external terminal; 70. Second conductive busbar; 71. First section; 72. Second section; 73. Bending section; 80. Fan assembly; 81. Cooling fan; 82. Mounting plate; 83. Ventilation opening; 84. Protective cover; 90. Current monitoring module; 91. Hall sensor; 92. Perforation; 93. Adjusting screw; 94. Insulating feet; 100. Circuit board; 101. Support bracket; 110. Air duct plate; 111. Airflow guide space; 112. Top plate; 113. Side plate; 114. Airflow guide plate; 120. Grating mesh. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments.

[0026] In the description of the embodiments in this application, the words "exemplary" or "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0027] This application provides a static changeover switch, which features high space utilization and excellent heat dissipation.

[0028] The static transfer switch provided in this application is an automatic switching device that uses thyristors as switching elements to quickly and seamlessly switch between two independent AC power supplies. The core purpose of the static transfer switch is to rapidly switch critical loads to the backup power supply when the main power supply fails (such as power outage, overvoltage, undervoltage, or frequency abnormalities), thereby ensuring the continuity and high availability of power supply to the load. The static transfer switch provided in this application is applicable to rated power capacities of up to 200 kW.

[0029] Figure 1 A schematic diagram of the appearance of the static changeover switch provided in this application. Figure 2 A first perspective view of the internal components of the static changeover switch provided in this application.

[0030] like Figure 1 and Figure 2 As shown, the static changeover switch includes a housing 10, a heat sink 20, a functional component 30, a first connector 40, a first conductive bar 50, a second connector 60, a second conductive bar 70, a fan assembly 80, a current monitoring module 90, and a circuit board 100. The housing 10 has a receiving cavity 11, and a first air vent 12 and a second air vent 13 are respectively provided at both ends of the housing 10 in the first direction X. The first air vent 12 can be used as an air inlet of the housing 10, and the second air vent 13 can be used as an air outlet of the housing 10.

[0031] The heat sink 20 is disposed within the receiving cavity 11 and located in the middle of the housing 10. A fan assembly 80 is disposed within the receiving cavity 11 and provides cooling airflow to the heat sink 20 and the functional device 30. A current monitoring module 90 is disposed within the receiving cavity 11 and located on the side of the heat sink 20 facing the second air vent 13. The functional device 30 is disposed within the receiving cavity 11 and is thermally connected to the heat sink 20.

[0032] Figure 3 A second perspective view of the internal components of the static changeover switch provided in this application.

[0033] Please refer to the following: Figure 3 For example, the functional device 30 can be a thyristor 31, and the heat sink 20 can be a finned heat sink 20. The side of the heat sink 20 facing the bottom wall 15 of the housing 10 has a plurality of fins 21, the fins 21 being parallel to a first direction X, and the plurality of fins 21 being spaced apart along a second direction Y, the second direction Y being perpendicular to the first direction X. The functional device 30 is fixed to the side of the heat sink 20 facing away from the bottom wall 15 of the housing 10.

[0034] The first connector 40 can be used as the output connector of a static transfer switch, and the second connector 60 can be used as the input connector of a static transfer switch. The first connector 40 and the second connector 60 are respectively disposed in the housing 10, and are spaced apart along a first direction X. The first conductive bus 50 is disposed within the receiving cavity 11 and connected to the functional device 30 and the first connector 40. The second conductive bus 70 is disposed within the receiving cavity 11 and connected to the functional device 30 and the second connector 60.

[0035] The current monitoring module 90 is connected to the second busbar 70. The circuit board 100 is disposed within the accommodating cavity 11, and both the current monitoring module 90 and the functional device 30 are electrically connected to the circuit board 100. The current monitoring module 90 is used to monitor the current magnitude of the second busbar 70. If the current exceeds the safe range (e.g., short circuit or overload), the circuit board 100 can quickly receive a signal and command the thyristor 31 to turn off, protecting the equipment from damage.

[0036] In the example of this application, both the first connector 40 and the second connector 60 are three-phase electrical connectors, and each phase of the power supply path is provided with an independent thyristor 31 as a switching device. That is, the number of functional devices 30 is 3, and all three functional devices 30 are connected to the heat sink 20. Correspondingly, the number of first conductive bus 50 and second conductive bus 70 is also 3. The three sets of first conductive bus 50 are respectively connected between the three functional devices 30 and the first connector 40, and the three sets of second conductive bus 70 are respectively connected between the three functional devices 30 and the second connector 60.

[0037] The static changeover switch provided in this application establishes an electrical connection between a first connector 40 and a functional device 30 on one side of the heat sink 20 via a first conductive bus 50, while a second conductive bus 70 establishes an electrical connection between a second connector 60 and a functional device 30 on the other side of the heat sink 20. Furthermore, the fan assembly 80 and the current monitoring module 90 are respectively arranged on opposite sides of the heat sink 20, making the internal component layout of the housing 10 more reasonable and improving space utilization.

[0038] In actual operation, the heat generated by the functional device 30 is conducted to the heat sink 20. At this time, the fan assembly 80 starts to work and forms an airflow between the first air vent 12 and the second air vent 13. That is, the cold air outside the housing 10 can enter the interior through the first air vent 12, and after heat exchange along the first direction X through the heat sink 20, the hot air can be discharged from the outside of the housing 10 through the second air vent 13, achieving the effect of rapid heat dissipation, improving the stability and safety of the equipment, and supporting high-power application scenarios of 200KW.

[0039] It is worth noting that in other embodiments, the positions of the first air vent 12 and the second air vent 13 can be interchanged. That is, the first air vent 12 can be used as the air outlet of the housing 10, and the second air vent 13 can be used as the air inlet of the housing 10. The functions of the first connector 40 and the second connector 60 can also be interchanged. That is, the first connector 40 can be used as the input-side connector of the static changeover switch, and the second connector 60 can be used as the output-side connector of the static changeover switch. The specific configuration can be adjusted according to actual needs, and this application does not impose any restrictions on this.

[0040] In some embodiments, the housing 10 is generally rectangular, and an accommodating cavity 11 is formed inside the housing 10. The accommodating cavity 11 has an opening extending through the top surface of the housing 10. A cover plate 14 covering the opening is provided on the top of the housing 10. The cover plate 14 is detachably fixed to the housing 10. During normal operation, the cover plate 14 covers the accommodating cavity 11 and protects the internal components. When maintenance is required, the user can remove the cover plate 14 to open the accommodating cavity 11 for easy operation.

[0041] Figure 4 A schematic diagram of the structure of the wind turbine assembly provided in this application.

[0042] Please refer to the following: Figure 4 In some embodiments, the fan assembly 80 is disposed on the side of the radiator 20 facing the first air outlet 12. In other embodiments, the fan assembly 80 may also be disposed on the side of the radiator 20 away from the first air outlet 12, or disposed between the first air outlet 12 and the second air outlet 13. Alternatively, there may be multiple fan assemblies 80 distributed in multiple different locations, and this application does not impose any limitations on this.

[0043] In this embodiment, the fan assembly 80 includes a cooling fan 81, a mounting plate 82, and a protective cover 84. The cooling fan 81 has an air inlet side and an air outlet side. The cooling fan 81 is fixed to the first air inlet 12 of the housing 10 by the mounting plate 82, with the air inlet side of the cooling fan 81 facing outwards from the housing 10 and the air outlet side facing inwards from the housing 10. Thus, when the cooling fan 81 is working, it forces air to enter the housing 10 from the first air inlet 12. The airflow passes through the housing 10 along the first direction X and is then discharged from the housing 10 from the second air inlet 13.

[0044] Specifically, there are multiple cooling fans 81, which are distributed at intervals along the second direction Y. For example, the number of cooling fans 81 is 2. Multiple cooling fans 81 can operate simultaneously, accelerating the gas flow rate and further improving heat dissipation efficiency.

[0045] Mounting plate 82 is disposed at one end of housing 10 near the first air vent 12, which extends through both the inner and outer sides of housing 10. Mounting plate 82 is disposed at the first air vent 12 and is fixedly connected to housing 10. Mounting plate 82 has ventilation openings 83 extending through both sides of mounting plate 82. The number and distribution of ventilation openings 83 correspond to the cooling fans 81. Cooling fans 81 are fixed to the side of mounting plate 82 facing the receiving cavity 11, with the air inlet side of cooling fans 81 facing the corresponding ventilation opening 83. The number and distribution of protective covers 84 correspond to the ventilation openings 83. Protective covers 84 are fixed to the side of mounting plate 82 away from the receiving cavity 11, covering the corresponding ventilation openings 83 and shielding and protecting cooling fans 81.

[0046] It is understandable that the mounting plate 82 serves as the support carrier for the fan assembly 80, and the cooling fan 81 and the protective cover 84 are both fixed to the mounting plate 82. In the assembly process, the cooling fan 81 and the protective cover 84 can be installed on the mounting plate 82 respectively first, and then the cooling fan 81, the mounting plate 82 and the protective cover 84 can be fixed as a whole to the first air outlet 12 of the housing 10, thereby improving the assembly efficiency.

[0047] Figure 5A third perspective view of the internal components of the static changeover switch provided in this application.

[0048] Please refer to the following: Figure 5 In some embodiments, the static changeover switch further includes a duct plate 110, which is disposed within the receiving cavity 11. The duct plate 110 and the bottom wall 15 of the housing 10 enclose a flow guiding space 111, which is positioned directly opposite the fan assembly 80. In the first direction X, the size of the flow guiding space 111 gradually decreases from the fan assembly 80 to the plurality of fins 21.

[0049] Exemplarily, the air duct plate 110 includes a top plate 112, side plates 113, and guide plates 114. The top plate 112 is arranged parallel to the second direction Y, and there is a gap between the top plate 112 and the bottom wall 15 of the receiving cavity 11. The guide plate 114 is integrally formed with the top plate 112 and is located on the side of the top plate 112 facing the radiator 20. The guide plate 114 is inclined towards the fins 21 of the radiator 20. In the first direction X, the distance between the guide plate 114 and the bottom wall 15 gradually decreases from the fan assembly 80 to the plurality of fins 21. There are two side plates 113, which are distributed at both ends of the top plate 112 in the second direction Y. The side plates 113 are formed by bending from the ends of the top plate 112 and are fixedly connected to the housing 10 to support the top plate 112 and the guide plate 114.

[0050] Specifically, the top plate 112, the guide plate 114, the side plate 113, and the bottom wall 15 enclose a flow guiding space 111. Due to the inclined arrangement of the guide plate 114, the internal size of the flow guiding space 111 at the top plate 112 is larger, so that the heat dissipation fan 81 can be partially housed in the flow guiding space 111. At the same time, the internal size of the flow guiding space 111 at the guide plate 114 gradually decreases. When the heat dissipation fan 81 causes the airflow to pass through the flow guiding space 111 along the first direction X, the airflow is gradually compressed by the guide plate 114 to increase the flow velocity, accelerate the airflow velocity at the fins 21 of the radiator 20, and thus improve the heat exchange efficiency.

[0051] Figure 6 A top view of the internal components of the static changeover switch provided in this application. Figure 7 A schematic diagram showing the distribution of the first and second conductive busbars provided in this application.

[0052] Please refer to the following: Figure 6 and Figure 7 In some embodiments, the first connector 40 is located on the side of the housing 10 in the second direction Y. For example, the first connector 40 is located at one end of the housing 10 near the first air vent 12, and the side where the first connector 40 is located is adjacent to the side where the first air vent 12 is opened.

[0053] For example, a first connector 40 is embedded and fixed to the housing 10. The first connector 40 has three first external terminals 42 and three first adapter terminals 41 corresponding to three-phase power. The three first external terminals 42 are exposed outside the housing 10 for connection to external power supply equipment. The three first adapter terminals 41 are located inside the housing 10 and distributed along the first direction X. The three first adapter terminals 41 are electrically connected to three sets of first conductive busbars 50 respectively.

[0054] It is understandable that the first connector 40 and the first air vent 12 are arranged on different sides of the housing 10 to avoid the external power supply equipment from blocking the airflow channel of the cooling fan 81 when connected to the first connector 40, thus ensuring the heat dissipation effect and leaving more operating space to facilitate the wiring operation of the external power supply equipment.

[0055] In some embodiments, each group of first conductive busbars 50 has a first segment 51 and a second segment 52, the first segment 51 and the second segment 52 are independent conductive structures, and an angle is formed between the first segment 51 and the second segment 52. One end of the first segment 51 is connected to the first connector 40, the other end of the first segment 51 is connected to the second segment 52, and the end of the second segment 52 away from the first segment 51 is connected to the functional device 30.

[0056] Exemplarily, both the first segment 51 and the second segment 52 can be made of copper busbars. The first segment 51 is at least partially parallel to the second direction Y, and the second segment 52 is parallel to the first direction X. In this application, at least one first adapter terminal 41 and the corresponding second segment 52 are staggered in the first direction X, and at least one of the three first segments 51 is bent and extended to allow the two ends of the first segment 51 to be respectively connected to the staggered first adapter terminal 41 and the second segment 52.

[0057] Specifically, the first segments 51 of the three sets of first conductive busbars 50 are defined as first segment 51A, first segment 51B, and first segment 51C, respectively. In the first direction X, first segments 51A, first segment 51B, and first segment 51C are distributed sequentially in the direction away from the functional device 30. The second segments 52 of the three sets of first conductive busbars 50 are defined as second segment 52A, second segment 52B, and second segment 52C, respectively. In the second direction Y, second segments 52A, second segment 52B, and second segment 52C are distributed sequentially in the direction away from the first connector 40.

[0058] The three first adapter terminals 41 are defined as first adapter terminal 41A, first adapter terminal 41B and first adapter terminal 41C. In the first direction X, the first adapter terminals 41A, first adapter terminal 41B and first adapter terminal 41C are distributed in sequence in the direction away from the heat sink 20.

[0059] The second segment 52A, the second segment 52B, the second segment 52C and the first adapter terminal 41A are arranged overlapping in the second direction Y. The first segment 51A is parallel to the second direction Y. The two ends of the first segment 51A are respectively connected to the second segment 52A and the first adapter terminal 41A.

[0060] The first adapter terminal 41B and the second segment 52B are staggered in the first direction X. One end of the first segment 51B is parallel to the second direction Y and is connected to the first adapter terminal 41B, while the other end of the first segment 51B is bent and extended and connected to the second segment 52B.

[0061] The first adapter terminal 41C and the second segment 52C are staggered in the first direction X. One end of the first segment 51C is parallel to the second direction Y and is connected to the first adapter terminal 41C, while the other end of the first segment 51C is bent and extended and connected to the second segment 52C.

[0062] In this embodiment, multiple functional devices 30 are spaced apart along the second direction Y, while multiple first adapter terminals 41 of the first connector 40 are spaced apart along the first direction X, resulting in a staggered arrangement between the functional devices 30 and the multiple first adapter terminals 41. By utilizing the multi-segment design of the first conductive bus 50 and the partially bent extension design of the first segment 51, the staggered first adapter terminals 41 and functional devices 30 can be connected. This optimizes the spatial layout, improves space utilization, and reduces the overall size of the device while meeting conductivity requirements.

[0063] In some embodiments, the static changeover switch further includes a first support member 18, which is disposed within the accommodating cavity 11 and located on the side of the radiator 20 facing the first air vent 12. The first support member 18 has a gap with the bottom wall 15 of the housing 10, and the first support member 18 is provided with a first insulating post 181, which is fixedly connected to the first conductive bar 50.

[0064] For example, the first support member 18 is parallel to the second direction Y, and its two ends are respectively fixed to opposite sides of the housing 10. The first insulating post 181 is fixed to the side of the first support member 18 away from the bottom wall 15 of the accommodating cavity 11, and the number and distribution of the first insulating posts 181 correspond to the first conductive busbar 50. The connection between the first segment 51 and the second segment 52 is fixed to the first insulating post 181.

[0065] Understandably, multiple first insulating pillars 181 can respectively fix and support the inflection points of the first segment 51 and the second segment 52, making the first conductive busbar 50 more stable as a whole and ensuring the working stability and safety of the first conductive busbar 50. Furthermore, the first support member 18 is suspended relative to the bottom wall 15 of the accommodating cavity 11 to leave sufficient space for gas to pass through, reducing the weakening of the airflow flowing from the first air outlet 12 through the fins 21 and ensuring heat dissipation performance.

[0066] In some embodiments, the housing 10 is provided with handles 16 on opposite sides in the second direction Y. The handles 16 are recessed from the outside to the inside of the housing 10. The two handles 16 are respectively attached to the opposite sides of the radiator 20 in the second direction Y, so that the radiator 20 is positioned between the two handles 16.

[0067] Understandably, the handle 16 forms a protruding structure on the outside of the housing 10 to restrict the installation space of the radiator 20, facilitating the assembly of the radiator 20. Conversely, the handle 16 forms a recessed structure on the outside of the housing 10 for the user to grip, facilitating equipment handling. In this way, different functions can be achieved on the inside and outside of the housing 10 using the handle 16, resulting in a more ingenious structural design.

[0068] In some embodiments, the functional device 30 is fixedly connected to the side of the heat sink 20 away from the fins 21, and a thermally conductive layer is provided between the functional device 30 and the heat sink 20. For example, the thermally conductive layer can be thermally conductive silicone grease, which can accelerate the heat conduction from the functional device 30 to the heat sink 20 and strengthen the connection between the functional device 30 and the heat sink 20.

[0069] In some embodiments, the second connector 60 is located on the side of the housing 10 in the second direction Y. Exemplarily, the second connector 60 is located at one end of the housing 10 near the second air vent 13, and the side where the second connector 60 is located is adjacent to the side where the second air vent 13 is opened.

[0070] Exemplarily, the second connector 60 is embedded and fixed to the housing 10. The second connector 60 has three second external terminals 62 and three second adapter terminals 61 corresponding to three-phase power. The three second external terminals 62 are exposed outside the housing 10 for connection to external power supply equipment. The three second adapter terminals 61 are located inside the housing 10 and distributed along the first direction X. The three second adapter terminals 61 are electrically connected to three sets of second conductive busbars 70 respectively.

[0071] It is understandable that the second connector 60 and the second air vent 13 are respectively arranged on different sides of the housing 10 to avoid the external power supply equipment blocking the airflow channel of the cooling fan 81 when connected to the second connector 60, thus ensuring the heat dissipation effect.

[0072] In this embodiment, the second connector 60 and the first connector 40 are located on the same side of the housing 10, and an indicator light is also provided on the side of the housing 10 where the second connector 60 and the first connector 40 are located. The indicator light is electrically connected to the circuit board 100, and the indicator light can display the working status of the static changeover switch through different lighting modes. In this way, the first connector 40, the second connector 60, and the indicator light are located on the same side of the housing 10, which makes it convenient for users to connect the connectors and observe the status of the indicator light at the same time, thus improving the user experience.

[0073] In some embodiments, the height of the end of the second conductive bus 70 near the second connector 60 is lower than the height of the end of the second conductive bus 70 near the functional device 30, so that the end of the second conductive bus 70 near the second connector 60 is recessed to leave enough space for the circuit board 100 to accommodate it.

[0074] Specifically, each group of second conductive busbars 70 has a first portion 71 and a second portion 72. The first portion 71 and the second portion 72 are independent conductive structures, and an angle is formed between the first portion 71 and the second portion 72. One end of the first portion 71 is connected to the second connector 60, the other end of the first portion 71 is connected to the second portion 72, and the end of the second portion 72 away from the first portion 71 is connected to the functional device 30.

[0075] The second part 72 has a bending section 73 in the middle. The height of the first part 71 and the second part 72 near the end of the first part 71 is less than the height of the second part 72 away from the end of the first part 71. The circuit board 100 is located above the first part 71 and the second part 72 near the end of the first part 71.

[0076] Exemplarily, both the first portion 71 and the second portion 72 can be made of copper busbars. The first portion 71 is at least partially parallel to the second direction Y, and the second portion 72 is parallel to the first direction X. In this application, at least one second adapter terminal 61 and the corresponding second portion 72 are staggered in the first direction X, and at least one of the three first portions 71 is bent and extended to allow the two ends of the first portion 71 to be respectively connected to the staggered second adapter terminal 61 and the second portion 72.

[0077] Specifically, the first portions 71 of the three sets of second conductive busbars 70 are defined as first portion 71A, first portion 71B, and first portion 71C, respectively. In the first direction X, first portions 71A, first portion 71B, and first portion 71C are distributed sequentially in a direction away from the functional device 30. The second portions 72 of the three sets of second conductive busbars 70 are defined as second portion 72A, second portion 72B, and second portion 72C, respectively. In the second direction Y, second portions 72A, second portion 72B, and second portion 72C are distributed sequentially in a direction away from the second connector 60.

[0078] The three second adapter terminals 61 are defined as second adapter terminal 61A, second adapter terminal 61B and second adapter terminal 61C. In the first direction X, the second adapter terminals 61A, second adapter terminal 61B and second adapter terminal 61C are distributed in sequence in the direction away from the heat sink 20.

[0079] The second part 72A, the second part 72B, the second part 72C and the second adapter terminal 61A are arranged overlapping in the second direction Y. The first part 71A is parallel to the second direction Y. The two ends of the first part 71A are respectively connected to the second part 72A and the second adapter terminal 61A.

[0080] The second adapter terminal 61B and the second part 72B are staggered in the first direction X. One end of the first part 71B is parallel to the second direction Y and is connected to the second adapter terminal 61B, while the other end of the first part 71B is bent and extended and connected to the second part 72B.

[0081] The second adapter terminal 61C and the second part 72C are staggered in the first direction X. One end of the first part 71C is parallel to the second direction Y and is connected to the second adapter terminal 61C, while the other end of the first part 71C is bent and extended and connected to the second part 72C.

[0082] In this embodiment, multiple functional devices 30 are spaced apart along the second direction Y, while multiple second adapter terminals 61 of the second connector 60 are spaced apart along the first direction X, resulting in a staggered arrangement between the functional devices 30 and the multiple second adapter terminals 61. Utilizing the multi-segment design of the second conductive bus 70 and the partially bent extension design of the first portion 71, the staggered second adapter terminals 61 and functional devices 30 can be connected. This optimizes the spatial layout, improves space utilization, and reduces the overall size of the device while meeting conductivity requirements.

[0083] In some embodiments, the static changeover switch further includes a second support member 19, which is disposed within the accommodating cavity 11 and located on the side of the radiator 20 facing the second air vent 13. The second support member 19 has a gap with the bottom wall 15 of the housing 10, and the distance between the second support member 19 and the bottom wall 15 of the housing 10 is less than the distance between the first support member 18 and the bottom wall 15 of the housing 10. The second support member 19 is provided with a second insulating post 191, which is fixedly connected to the second conductive bar 70.

[0084] For example, the second support member 19 is parallel to the second direction Y, and its two ends are respectively fixed to opposite sides of the housing 10. The second insulating post 191 is fixed to the side of the second support member 19 away from the bottom wall 15 of the accommodating cavity 11, and the number and distribution of the second insulating posts 191 correspond to the second conductive busbar 70. The connection between the first part 71 and the second part 72 is fixed to the second insulating post 191.

[0085] Understandably, multiple second insulating pillars 191 can respectively fix and support the inflection points of the first part 71 and the second part 72, making the second conductive bus 70 more stable overall and ensuring the operational stability and safety of the second conductive bus 70. Furthermore, the second support member 19 is suspended relative to the bottom wall 15 of the accommodating cavity 11 to allow sufficient space for gas passage, reducing the weakening of the airflow from the second air vent 13 through the fins 21 and ensuring heat dissipation performance. Simultaneously, utilizing the height difference between the first support member 18 and the second support member 19, the end of the second conductive bus 70 near the second connector 60 is recessed to provide sufficient space for the circuit board 100 to be accommodated.

[0086] In some embodiments, the circuit board 100 is an ARM board, which is an embedded development board or single-board computer that uses an ARM architecture processor as the core computing unit, and has the advantages of low power consumption, low cost and high integration. The circuit board 100 is equipped with a support frame 101, and a bracket 17 is provided on the inner wall of the housing 10. The support frame 101 overlaps and is fixed to the bracket 17, and the circuit board 100 is fixed to the support frame 101.

[0087] Figure 8 This is a schematic diagram of the Hall sensor provided in this application.

[0088] Please refer to the following: Figure 8 In some embodiments, the current monitoring module 90 is a Hall sensor 91. The second part 72, near one end of the first part 71, passes through the Hall sensor 91 and is secured to it. Exemplarily, the Hall sensor 91 has a through hole 92 in its middle, through which the second part 72 passes. The Hall sensor 91 is provided with an insulating foot cup 94 and an adjusting screw 93. The insulating foot cup 94 abuts against the second part 72, and the adjusting screw 93 is used to adjust the position of the insulating foot cup 94.

[0089] It is understood that the distance between the insulating foot cup 94 and the second part 72 can be adjusted by adjusting the screw 93, so that the insulating foot cup 94 presses against the surface of the second part 72, thereby locking the second part 72 and the Hall sensor 91 firmly in place. This allows for high-precision installation, ensuring correct alignment between the Hall sensor 91 and the second conductive bus 70, while also preventing loosening and improving the connection stability between the Hall sensor 91 and the second conductive bus 70.

[0090] In some embodiments, a grille 120 is provided at the end of the housing 10 away from the first air vent 12. The grille 120 has multiple through-hole structures, forming a second air vent 13. The grille 120 can prevent debris outside the housing 10 from entering the accommodating cavity 11 through the second air vent 13 and interfering with the operation of the components. It can also ensure that hot air inside the housing 10 can be discharged outside the housing 10 through the second air vent 13.

[0091] The following describes the assembly method of the static transfer switch provided in this application.

[0092] First, the handle 16 is riveted and fixed to the housing 10 for easy handling and to position the radiator 20. The radiator 20 is then fixed to the housing 10 with screws. The air duct plate 110, the first connector 40, and the second connector 60 are then fixed to the housing 10 with screws.

[0093] Then, the first support member 18, pre-installed with the first insulating post 181, is placed into the housing 10, and both ends of the first support member 18 are fixed to the housing 10 with screws. The second support member 19, pre-installed with the second insulating post 191, is placed into the housing 10, and both ends of the second support member 19 are fixed to the housing 10 with screws. Thermal grease is applied to the bottom surface of the thyristor 31, and the thyristor 31 is fixed to the heat sink 20 with screws.

[0094] Then, one end of the first segment 51 is bolted and fixed to the first adapter terminal 41 of the first connector 40, and the other end of the first segment 51 is bolted and fixed to the first insulating post 181. One end of the second segment 52 is bolted and fixed to the first insulating post 181, and the other end of the second segment 52 is bolted and fixed to the thyristor 31. One end of the first part 71 is bolted and fixed to the second adapter terminal 61 of the second connector 60, and the other end of the first part 71 is bolted and fixed to the second insulating post 191. One end of the second part 72 is bolted and fixed to the second insulating post 191, and the other end of the second part 72 is bolted and fixed to the thyristor 31. The second part 72 passes through the Hall sensor 91 and is secured by the adjusting screw 93 and the insulating foot cup 94.

[0095] Then, the support bracket 101 is fixed to the bracket 17 on the side of the housing 10 with screws, and the circuit board 100 is fixed to the support bracket 101 with screws. The indicator light is fixed to the housing 10 with nuts. Then, the cooling fan 81 and the protective cover 84 are fixed to the mounting plate 82, and the mounting plate 82 is fixed at the first air vent 12. Then, the cover plate 14 is installed on the housing 10 to close the receiving cavity 11.

[0096] Understandably, the static transfer switch provided in this application offers a modular internal layout, decomposing a complex power electronic device into multiple independent modules. This makes the entire assembly process smooth and efficient, effectively avoiding interference between different components during installation, and ensuring the consistency and high quality of the final product.

[0097] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments described above should be considered exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application.

Claims

1. A static changeover switch, characterized in that, include: The housing has a accommodating cavity, and a first air vent and a second air vent are respectively provided at both ends of the housing in a first direction; A radiator is disposed within the accommodating cavity and located in the middle of the housing; The functional device is disposed within the accommodating cavity and is thermally connected to the heat sink; A first connector is disposed in the housing; A first conductive bus is disposed within the accommodating cavity and connected to the functional device and the first connector; The second connector is disposed in the housing and is spaced apart from the first connector along the first direction; The second conductive bus is disposed within the accommodating cavity and connected to the functional device and the second connector; A fan assembly is disposed within the accommodating cavity and is used to provide cooling airflow to the radiator and the functional devices; A current monitoring module is disposed within the accommodating cavity and located on the side of the heat sink facing the second air vent. The current monitoring module is connected to the second conductive busbar.

2. The static changeover switch as described in claim 1, characterized in that, The radiator has multiple fins on the side facing the bottom wall of the housing. The fins are parallel to the first direction, and the multiple fins are spaced apart along a second direction, which is perpendicular to the first direction. The functional device is fixed to the side of the radiator facing away from the bottom wall of the housing.

3. The static changeover switch as described in claim 2, characterized in that, The static changeover switch also includes a duct plate, which is disposed within the accommodating cavity. A flow guiding space is formed between the duct plate and the bottom wall of the housing. The flow guiding space is positioned directly opposite the fan assembly. In the first direction, the size of the flow guiding space gradually decreases from the fan assembly to the plurality of fins.

4. The static changeover switch as described in claim 2, characterized in that, The first conductive bus has a first segment and a second segment. One end of the first segment is connected to the first connector, the other end of the first segment is connected to the second segment, and the end of the second segment away from the first segment is connected to the functional device. The first connector is located on the side of the housing in the second direction, and an angle is formed between the first segment and the second segment.

5. The static changeover switch as described in claim 4, characterized in that, The static changeover switch further includes a first support member, which is disposed within the accommodating cavity. The first support member is located on the side of the radiator facing the first air outlet. The first support member has a gap with the bottom wall of the housing. The first support member is provided with a first insulating post, and the connection between the first segment and the second segment is fixed to the first insulating post.

6. The static changeover switch as described in claim 2, characterized in that, A bent section is provided in the middle of the second conductive busbar, and the height of the end of the second conductive busbar near the second connector is lower than the height of the end of the second conductive busbar near the functional device. The static changeover switch also includes a circuit board disposed within the accommodating cavity and located above the second conductive bar near one end of the second connector.

7. The static changeover switch as described in claim 6, characterized in that, The second conductive bus has a first part and a second part, one end of the first part is connected to the second connector, the other end of the first part is connected to the second part, and the end of the second part away from the first part is connected to the functional device; The second connector is located on the side of the housing in the second direction, and an angle is formed between the first part and the second part; the bending section is provided in the middle of the second part, and the height of the first part and the second part near one end of the first part is less than the height of the second part away from one end of the first part.

8. The static changeover switch as described in claim 7, characterized in that, The static changeover switch further includes a second support member, which is disposed within the accommodating cavity. The second support member is located on the side of the radiator facing the second air vent. The second support member has a gap with the bottom wall of the housing. The second support member is provided with a second insulating post, and the connection between the first part and the second part is fixed to the second insulating post.

9. The static changeover switch as described in claim 7, characterized in that, The current monitoring module is a Hall sensor. The second part is inserted into the Hall sensor at one end near the first part and is clamped and fixed to the Hall sensor.

10. The static changeover switch as described in claim 9, characterized in that, The Hall sensor is equipped with an insulating foot cup and an adjusting screw. The insulating foot cup rests against the second part, and the adjusting screw is used to adjust the position of the insulating foot cup.

11. The static changeover switch as described in claim 2, characterized in that, The housing is provided with handles on opposite sides in the second direction. The handles are recessed inward from the outside of the housing, and the two handles are respectively attached to opposite sides of the radiator.

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