A disconnector and power conversion device

Abstract

The utility model provides a kind of isolator and power conversion device, it is related to electrical equipment technical field.Isolator includes shell, handle, multiple switch units and at least one short-circuiting piece;Handle is movably arranged in shell, multiple switch units are all with handle transmission connection, multiple switch units are all provided with first connecting end and second connecting end, at least one short-circuiting piece is connected with the first connecting end of any at least two switch units, and / or, at least another short-circuiting piece is connected with the second connecting end of any at least two multiple switch units.Therefore, isolator is in the case where the same specification switch unit is used, by short-circuiting piece and different quantity first connecting end or second connecting end short-circuiting to meet different external load current demand, significantly improve the adaptability and versatility of isolator, thus also reduce production and maintenance cost, while improving product integration degree.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and more specifically, to a disconnecting switch and a power conversion device. Background Technology

[0002] Disconnect switches, as important control and protection devices in power systems, are widely used in various power distribution devices to reliably disconnect and isolate circuits, ensuring equipment maintenance safety and stable system operation. Disconnect switches used in photovoltaic systems typically consist of multiple stacked switch units, each connected to a specific string to meet the needs of multi-circuit control.

[0003] In practical photovoltaic (PV) system applications, some PV string system designs require that one layer of the disconnecting switch's unit carries a larger current, while the remaining layers carry a smaller current. To meet these differentiated usage requirements, existing disconnecting switches often need to design multiple switching units with different specifications. However, there is a lack of versatility between different specifications of switching units, and because each switching unit needs to be designed and manufactured separately, production costs and maintenance complexity are significantly increased. In addition, the existing structure is difficult to adapt flexibly to diverse application scenarios, limiting the product's versatility. Utility Model Content

[0004] The purpose of this utility model is to provide an isolating switch and power conversion device that can adapt to various current requirements with the same specification of switching unit, thereby improving the versatility of the switching unit, reducing manufacturing and maintenance costs, and improving the applicability and integration level of the product.

[0005] The embodiments of this utility model are implemented as follows:

[0006] In a first aspect, this utility model provides an isolating switch, comprising:

[0007] case

[0008] A handle, which is movably disposed within the housing;

[0009] Multiple switch units are provided, each of which is connected to the handle. Each switch unit is provided with a first connection end and a second connection end. The handle is used to make the first connection end and the second connection end of the multiple switch units either in an on or off state.

[0010] At least one shorting element is connected to the first connection terminal of any at least two of the switching units, and / or at least another shorting element is connected to the second connection terminal of any at least two of the plurality of switching units.

[0011] In an optional implementation, the jumper, the first connection terminal, and the second connection terminal are all used to connect to external wires or a circuit board.

[0012] In an optional implementation, the sum of the number of the shorting connectors used to connect to the first connection terminal and the number of the other first connection terminals used to connect to external wires or circuit boards is less than the number of the switching units.

[0013] And / or, the sum of the number of the shorting pins used for connection to the second connection terminal and the number of the other second connection terminals used for connection to external wires or circuit boards is less than the number of the switching units.

[0014] In an optional embodiment, the plurality of switch units are stacked sequentially along the axial direction of the drive shaft of the handle.

[0015] In an optional embodiment, the plurality of switch units are stacked vertically along the axial direction of the drive shaft of the handle to form a row.

[0016] Alternatively, the plurality of switch units may be stacked vertically along the axial direction of the drive shaft of the handle to form a column, and each column of switch units may be stacked along the axial direction of the drive shaft of the handle to form at least two columns.

[0017] In an optional embodiment, the shorting connector is integrally formed with the first connecting end or the second connecting end, or the shorting connector is detachably connected to the first connecting end or the second connecting end.

[0018] In an optional embodiment, the jumper is connected to the first or second connection terminal of at least two adjacent switching units, and / or the jumper is connected to the first or second connection terminal of at least two spaced-apart switching units.

[0019] In an optional embodiment, the shorting member is disposed inside or outside the unit housing of the switching unit.

[0020] In an optional embodiment, each of the plurality of switching units includes a unit housing, a moving contact, and two stationary contacts. The moving contact is movably disposed in the unit housing, and the two stationary contacts are disposed in the unit housing and respectively connected to the first connection end and the second connection end. The handle is drivenly connected to the moving contact of each of the plurality of switching units and is used to drive the moving contact to close or open with the corresponding two stationary contacts, so that the first connection end and the second connection end of the switching unit are in a connected state or a disconnected state.

[0021] Secondly, this utility model provides a power conversion device, including an isolating switch as described in any of the foregoing embodiments.

[0022] The beneficial effects of the disconnecting switch and power conversion device provided in this embodiment include: by connecting the shorting member to the first or second connection terminal of any number of switching units, multiple switching units can be short-circuited to form a parallel structure, thereby enabling the use of higher current-carrying capacity. Furthermore, the connection path between the shorting member and the external load allows for flexible configuration of the conductive circuit according to the actual current requirements of the load, effectively adapting to application scenarios with different current levels. This significantly improves the adaptability and versatility of the disconnecting switch, reduces production and maintenance costs, and enhances product integration. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a first-view structural schematic diagram of the disconnecting switch provided in the embodiment of the present utility model.

[0025] Figure 2 A schematic diagram of the second view of the first embodiment of the disconnecting switch provided in this utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of the switching unit provided in an embodiment of the present utility model;

[0027] Figure 4 A schematic diagram of the first view of the second embodiment of the disconnecting switch provided in this utility model;

[0028] Figure 5 This is a second-view structural schematic diagram of the disconnecting switch provided in the second embodiment of the present utility model.

[0029] Icons: 10-Disconnecting switch; 100-Housing; 200-Handle; 300-Switch unit; 310-First connection terminal; 320-Second connection terminal; 330-Unit housing; 340-Moving contact; 350-Stationary contact; 400-Short circuit. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Disconnect switches, as important control and protection devices in power systems, are widely used in various power distribution devices to reliably disconnect and isolate circuits, ensuring equipment maintenance safety and stable system operation. Disconnect switches used in photovoltaic systems typically consist of multiple stacked switch units, each connected to a specific string to meet the needs of multi-circuit control.

[0037] In practical photovoltaic (PV) system applications, some PV string system designs require that one layer of the disconnecting switch's unit carries a larger current, while the remaining layers carry a smaller current. To meet these differentiated usage requirements, existing disconnecting switches often need to design multiple switching units with different specifications. However, there is a lack of versatility between different specifications of switching units, and because each switching unit needs to be designed and manufactured separately, production costs and maintenance complexity are significantly increased. In addition, the existing structure is difficult to adapt flexibly to diverse application scenarios, limiting the product's versatility.

[0038] Based on the problems existing in the current technology, please refer to Figures 1 to 5 This utility model provides an isolating switch 10, which can adapt to various current requirements by using a switch unit 300 of the same specification, thereby improving the versatility of the switch unit 300, reducing manufacturing and maintenance costs, and improving the product's applicability and integration level.

[0039] In detail, the disconnecting switch 10 includes a housing 100, a handle 200, a switching unit 300, and a shorting member 400.

[0040] The handle 200 is movably disposed in the housing 100; there are multiple switch units 300, and the specifications of the multiple switch units 300 are the same. The multiple switch units 300 are all connected to the handle 200 in a transmission manner. The multiple switch units 300 are provided with a first connection end 310 and a second connection end 320. The handle 200 is used to make the first connection end 310 and the second connection end 320 of the multiple switch units 300 in a connected state or a disconnected state. That is, when the first connection end 310 and the second connection end 320 are respectively connected to an external load, the handle 200 drives the switch unit 300 to close or open, so that the conductive circuit where the first connection end 310 and the second connection end 320 are located is connected or disconnected.

[0041] The number of shorting connectors 400 is at least one. At least one shorting connector 400 can be connected to the first connection terminal 310 of any at least two switching units 300, and at least another shorting connector 400 can also be connected to the second connection terminal 320 of any at least two switching units 300. Of course, when there are multiple shorting connectors 400, at least one shorting connector 400 is connected to the first connection terminal 310, and at least another shorting connector 400 is connected to the second connection terminal 320.

[0042] Specifically, the connection relationship between the shorting connector 400 and the first connecting end 310 and the second connecting end 320 includes the following methods: (1) one shorting connector 400 is connected to any at least two first connecting ends 310; (2) multiple shorting connectors 400 are connected to any at least two first connecting ends 310; (3) one shorting connector 400 is connected to any at least two second connecting ends 320; (4) multiple shorting connectors 400 are connected to any at least two second connecting ends 320; (5) one shorting connector 400 is connected to any at least two first connecting ends 310, and another shorting connector... (6) One shorting pin 400 is connected to any at least two second connection terminals 320; and multiple shorting pins 400 are connected to any at least two first connection terminals 310; (7) Multiple shorting pins 400 are connected to any at least two first connection terminals 310; and another shorting pin 400 is connected to any at least two second connection terminals 320; (8) Multiple shorting pins 400 are connected to any at least two first connection terminals 310; and multiple shorting pins 400 are connected to any at least two second connection terminals 320.

[0043] It is worth mentioning that the same shorting connector 400 is only connected to the first connection terminal 310 or only connected to the second connection terminal 320. There is no situation where a shorting connector 400 is simultaneously connected to the first connection terminal 310 and the second connection terminal 320.

[0044] Therefore, by connecting the shorting connector 400 to the first connection terminal 310 or the second connection terminal 320 of any number of switching units 300, multiple switching units 300 can be shorted together to form a parallel structure, thereby enabling the use of higher current-carrying capacity. Thus, through the connection path between the shorting connector 400 and the external load, the conductive circuit can be flexibly configured according to the actual current requirements of the load, effectively adapting to application scenarios with different current levels.

[0045] Therefore, the disconnector 10 provided in this embodiment of the present invention, when using the same specification of switch unit 300, can be shorted by the shorting member 400 to short-circuit with different numbers of first connection terminals 310 or second connection terminals 320 to meet different external load current requirements, which significantly improves the adaptability and versatility of the disconnector 10, thereby reducing production and maintenance costs and improving the product integration level.

[0046] It is worth mentioning that the shorting connector 400, the first connecting end 310, and the second connecting end 320 are all used to connect to external wires or circuit boards.

[0047] Specifically, the first connection terminals 310 of any at least two switching units 300 are connected to the shorting connector 400, and the first connection terminals 310 of the shorting connector 400 and other multiple switching units are used to connect to external wires or circuit boards; and / or, the second connection terminals 320 of any at least two switching units 300 are connected to the shorting connector 400, and the second connection terminals 320 of the shorting connector 400 and other multiple switching units 300 are used to connect to external wires or circuit boards.

[0048] In other words, on the side where multiple switching units 300 are shorted to the shorting connector 400, the connection terminals of the multiple switching units 300 include connection terminals connected to the shorting connector 400 and connection terminals not shorted. Both types of connection terminals can be connected to the circuit system via external wires. For example, the shorting connector 400 and its connection terminals can be connected to external wires using bolts; alternatively, they can be connected to a circuit board to connect to the circuit system. For instance, the shorting connector 400 and its connection terminals can be fixed to the circuit board by soldering or by bolts.

[0049] Because at least two connection terminals on the side where multiple switch units 300 are shorted to the shorting member 400 are shorted through the shorting member 400, the number of shorting members 400 and connection terminals for connecting to external wires or circuit boards is less than the number of switch units.

[0050] Specifically, when the shorting connector 400 is connected to the first connection terminal 310, the sum of the number of shorting connectors 400 used to connect to the first connection terminal 310 and the number of other first connection terminals 310 used to connect to external wires or circuit boards is less than the number of switching units 300.

[0051] When the jumper 400 is connected to the second connection terminal 320, the number of jumpers 400 for connecting to the second connection terminal 320 and the number of other second connection terminals 320 for connecting to external wires or circuit boards are less than the number of switch units 300.

[0052] It should also be noted that, since the existing disconnect switch 10 uses switch units 300 of different specifications to match the current requirements of the external load, the first connection terminal 310 or the second connection terminal 320 of the existing multiple switch units 300 are connected to the external load one by one through external wires or circuit boards.

[0053] In this embodiment, the number of first connection terminals 310 for connecting to external wires or circuit boards is less than the number of switch units 300, and / or the number of second connection terminals 320 for connecting to external wires or circuit boards is less than the number of switch units 300. Therefore, compared with the existing disconnect switch 10, the disconnect switch 10 provided in this embodiment requires fewer wires to be connected or assembled, which not only facilitates assembly but also reduces production costs.

[0054] Furthermore, such as Figure 1 and Figure 2 As shown, multiple switch units 300 are stacked sequentially along the axial direction of the drive shaft of the handle 200.

[0055] It can be understood that the switch units 300 are stacked sequentially along the drive shaft of the handle 200, and the handle 200 can be rotated by the operator, so that the multiple switch units 300 can be synchronously connected or disconnected through the drive shaft.

[0056] Of course, in other embodiments of this utility model, the plurality of switch units 300 can also be arranged in other ways. For example, as Figure 4 and Figure 5 As shown, multiple switch units 300 are stacked vertically along the axial direction of the drive shaft of the handle 200 to form a row, and each row of switch units 300 is stacked along the axial direction of the drive shaft of the handle 200 to form at least two rows, that is, multiple switch units 300 are stacked in a matrix.

[0057] Furthermore, in other embodiments of this utility model, the multiple switch units 300 can also be arranged in other ways. For example, the multiple switch units 300 can be stacked in a single row along the axial direction perpendicular to the drive shaft of the handle 200. No specific limitation is made here.

[0058] Furthermore, the short connector 400 is integrally formed with the first connecting end 310 or the second connecting end 320, which not only improves its structural strength but also improves assembly efficiency.

[0059] Of course, in other embodiments of this utility model, the shorting member 400 can be detachably connected to the first connecting end 310 or the second connecting end 320, such as by bolt connection and riveting, so that it can be adjusted according to different load current requirements, which greatly improves adaptability.

[0060] Furthermore, the shorting member 400 is connected to the first connection terminal 310 or the second connection terminal 320 of at least two adjacent switching units 300, and / or, the shorting member 400 is connected to the first connection terminal 310 or the second connection terminal 320 of at least two spaced-apart switching units 300. In other words, the shorting member 400 can be shorted to the first connection terminal 310 of the switching unit 300 in the adjacent layer, or to the first connection terminal 310 of the non-adjacent switching unit 300. The shorting member 400 can also be shorted to the first connection terminal 310 of some of the switching units 300 in the adjacent layer, and to the first connection terminal 310 of another part of the non-adjacent switching units 300. This allows for corresponding adjustments according to different load current requirements, further improving adaptability.

[0061] It is understandable that the connection method between the second connection end 320 and the shorting connector 400 is the same as the connection method between the first connection end 310 and the shorting connector 400, and will not be described again here.

[0062] It is worth mentioning that the shorting connector 400 can be connected only to the first connection terminal 310 without connecting to the second connection terminal 320; of course, it can also be connected only to the second connection terminal 320 without connecting to the first connection terminal 310; of course, the shorting connector 400 can also be shorted to both the first connection terminal 310 and the second connection terminal 320 at the same time. Therefore, it can be adjusted according to different load current requirements to further improve the adaptability of the disconnector switch 10.

[0063] Optionally, the shorting connector 400 can be T-shaped, L-shaped, arc-shaped or other shapes, without specific limitations.

[0064] Furthermore, each of the multiple switching units 300 includes a unit housing 330, a moving contact 340, and two stationary contacts 350.

[0065] The moving contact 340 is movably disposed in the unit housing 330, and the two stationary contacts 350 are disposed in the unit housing 330 and connected to the first connection end 310 and the second connection end 320 respectively. The handle 200 is drivenly connected to the moving contacts 340 of the multiple switch units 300. Therefore, the handle 200 rotates relative to the housing 100 and the unit housing 330 under the operator's turning action, thereby driving the moving contact 340 to close or open with the corresponding two stationary contacts 350 through the transmission shaft, so that the first connection end 310 and the second connection end 320 of the switch unit 300 are in the connected state or disconnected state.

[0066] It is worth mentioning, such as Figure 1 and Figure 2 As shown, multiple unit housings 330 are arranged in a stacked manner along the drive shaft of the handle 200; in other embodiments of this utility model, such as Figure 4 and Figure 5 As shown, multiple unit housings 330 are arranged in a matrix-like stack along the drive shaft of the handle 200.

[0067] It should also be noted that the shorting connector 400 can be located inside the unit housing 330 or on the outside of the unit housing 330. It can be adjusted according to actual production needs, and no specific limitation is made here.

[0068] In summary, this utility model provides a disconnecting switch 10. When using the same specification of switch unit 300, the disconnecting switch 10 can be shorted to different numbers of first connection terminals 310 or second connection terminals 320 by shorting the shorting member 400 to meet different external load current requirements. This significantly improves the adaptability and versatility of the disconnecting switch 10, thereby reducing production and maintenance costs and improving the product integration level.

[0069] Furthermore, this utility model embodiment also provides a power conversion device, which includes the disconnecting switch 10 in the above embodiments. The power conversion device is applicable to fields such as energy storage systems. It can disconnect the electrical connection with the external power source in a timely manner through the disconnecting switch 10, thereby ensuring the safety and reliability of the power system.

[0070] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A disconnector (10), characterized in that include: Casing (100) A handle (200) is movably disposed on the housing (100). Multiple switch units (300) are connected to the handle (200) for transmission. Each switch unit (300) is provided with a first connection end (310) and a second connection end (320). The handle (200) is used to make the first connection end (310) and the second connection end (320) of the multiple switch units (300) in an on or off state. At least one shorting element (400) is connected to the first connection terminal (310) of any at least two of the switching units (300), and / or at least another shorting element (400) is connected to the second connection terminal (320) of any at least two of the plurality of switching units (300).

2. The disconnector (10) according to claim 1, characterized in that The shorting connector (400), the first connecting end (310), and the second connecting end (320) are all used to connect to external wires or circuit boards.

3. The disconnector (10) according to claim 2, characterized in that The sum of the number of the shorting connectors (400) used to connect to the first connection terminal (310) and the number of the other first connection terminals (310) used to connect to external wires or circuit boards is less than the number of the switching units (300); And / or, the sum of the number of the shorting pieces (400) for connection with the second connection terminal (320) and the number of the other second connection terminals (320) for connection with external wires or circuit boards is less than the number of the switching units (300).

4. The disconnector (10) according to claim 1, characterized in that The plurality of switch units (300) are stacked sequentially along the axial direction of the drive shaft of the handle (200).

5. The disconnector (10) according to claim 1, characterized in that, The plurality of switch units (300) are stacked vertically along the axial direction of the drive shaft of the handle (200) to form a row. Alternatively, the plurality of switch units (300) may be stacked vertically along the axial direction of the drive shaft of the handle (200) to form a column, and each column of the switch units (300) may be stacked along the axial direction of the drive shaft of the handle (200) to form at least two columns.

6. The disconnector (10) according to claim 1, characterized in that, The short connector (400) is integrally formed with the first connecting end (310) or the second connecting end (320), or the short connector (400) is detachably connected with the first connecting end (310) or the second connecting end (320).

7. The disconnector (10) according to claim 1, characterized in that, The shorting connector (400) is connected to the first connection terminal (310) or the second connection terminal (320) of at least two adjacent switching units (300), and / or the shorting connector (400) is connected to the first connection terminal (310) or the second connection terminal (320) of at least two spaced-apart switching units (300).

8. The disconnector (10) according to claim 1, characterized in that, The shorting member (400) is disposed inside or outside the unit housing (330) of the switching unit (300).

9. The disconnector (10) according to claim 1, characterized in that, Each of the plurality of switch units (300) includes a unit housing (330), a moving contact (340), and two stationary contacts (350). The moving contact (340) is movably disposed in the unit housing (330), and the two stationary contacts (350) are disposed in the unit housing (330) and connected to the first connection end (310) and the second connection end (320) respectively. The handle (200) is drivenly connected to the moving contact (340) of the plurality of switch units (300) and is used to drive the moving contact (340) to close or open with the corresponding two stationary contacts (350) so that the first connection end (310) and the second connection end (320) of the switch unit (300) are in a connected state or a disconnected state.

10. A power conversion device, characterized in that, Includes the disconnecting switch (10) as described in any one of claims 1-9.

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