Isolation switch and power supply system
By designing the isolating switch body units with different current carrying capacity, the design waste problem in the prior art caused by unequal currents per layer is solved, and a smaller and more economical isolating switch design is realized, which meets the needs of different convergence modes.
Patent Information
- Application Number
- CN202421804485.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-26
AI Technical Summary
Existing isolation switches in the inverter result in waste of design due to unequal currents per layer, increasing overall size and cost.
An isolating switch is designed, which includes a stacked first body unit and a second body unit, both of which have different current carrying capacity and are adapted to the current needs of different convergence modes. By adjusting the size and layout of the movable and static contacts, compatibility of different current carrying capacity is achieved.
The maximum utilization of the main unit of each layer is achieved, the overall size and cost of the isolating switch are reduced, and the needs of different convergence methods are adapted.
Smart Images
Figure CN222965998U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of low-voltage electrical appliances, and more particularly, to a disconnect switch and a power supply system. Background Art
[0002] In the field of photovoltaic power generation, the function of an inverter is to convert direct current into alternating current. To maximize power generation efficiency while taking into account low cost, most manufacturers use a multi-positive and common-negative current collection method. After the current is collected, the current flows through a disconnect switch and then to a power conversion unit. This current collection method makes the actual current value flowing through each layer of the disconnect switch unequal. Currently, the current-carrying capacity of each layer of all disconnect switches on the market is equal. To meet the actual working conditions, the frame current of the disconnect switch is often designed according to the maximum current, resulting in waste in application and also being unfavorable for reducing the overall size and cost of the disconnect switch. Summary of the Utility Model
[0003] The purpose of this application is to provide a disconnect switch and a power supply system, which can be compatible with the current requirements of different current collection methods and can also reduce the overall size and cost, aiming at the deficiencies in the above-mentioned prior art.
[0004] To achieve the above purpose, the technical solutions adopted in the embodiments of this application are as follows:
[0005] On the one hand, an embodiment of this application provides a disconnect switch, which at least includes a stacked first body unit and a second body unit, and the current-carrying capacities of the first body unit and the second body unit during operation are different.
[0006] Optionally, the current-carrying capacity of the first moving contact of the first body unit is L1 and the volume is V1, the current-carrying capacity of the second moving contact of the second body unit is L2 and the volume is V2. When the ratio of L1 to L2 is greater than 1.2 or less than 0.8, V2 is not equal to V1;
[0007] And / or, the current-carrying capacity of the first static contact of the first body unit is L3 and the volume is V3, the current-carrying capacity of the second static contact of the second body unit is L4 and the volume is V4. When the ratio of L3 to L4 is greater than 1.2 or less than 0.8, V4 is not equal to V3.
[0008] Optionally, the current-carrying capacity of the first body unit is L5 and the volume is V5, the current-carrying capacity of the second body unit is L6 and the volume is V6. When the ratio of L5 to L6 is greater than 1.2 or less than 0.8, V6 is not equal to V5.
[0009] Optionally, the first body unit and the second body unit are stacked along any two of the three directions of length, height, and thickness. When the dimensions of the first body unit and the second body unit in the two directions are respectively equal, the dimension of the first body unit in the remaining one direction is an integer multiple of the dimension of the second body unit in the remaining one direction.
[0010] Optionally, when the first body unit and the second body unit are stacked along the height direction, the lengths and thicknesses of the first body unit and the second body unit are respectively equal, and the height of the first body unit is greater than the height of the second body unit.
[0011] Optionally, it includes a handle and an operating mechanism, and the handle, the operating mechanism, and the body unit are connected in sequence;
[0012] It further includes a tripping mechanism linked with the operating mechanism, which is used to drive the operating mechanism to switch on and off when the handle is jammed.
[0013] Optionally, the axial direction A1 of the rotation center axis of the body unit is parallel or perpendicular to the arrangement direction A2 of the body, the operating mechanism, and the handle.
[0014] On the other hand, an embodiment of the present application provides a power supply system, which includes the above-mentioned disconnector, and also includes a DC input terminal, a DC output terminal, and a power conversion unit. The DC input terminal is connected to the disconnector, the disconnector is connected to the power conversion unit through the DC output terminal, direct current is input from the DC input terminal, and is input into the power conversion unit through the disconnector and the DC output terminal. The power conversion unit is used to convert the direct current into alternating current.
[0015] Optionally, the operating mechanism and the body unit of the disconnector are both located inside the power supply system, and the handle of the disconnector is located outside the power supply system.
[0016] Optionally, the disconnector is respectively connected to the DC input terminal and the DC output terminal through wires. Before the wires converge into the body unit of the disconnector at the DC input terminal, at least one group of the wires is subjected to current confluence.
[0017] The beneficial effects of the present application include:
[0018] The present application provides a disconnector and a power supply system. When the disconnector is operating, the current values flowing through at least two layers of body units are different. In this way, body units suitable for different current values can be designed according to different needs to accommodate the current requirements of different busbar connection methods, enabling each layer of body unit to be utilized to the greatest extent, avoiding unnecessary waste, effectively reducing the overall size of the disconnector, making it better adapted to the power supply system, and at the same time reducing the cost of the disconnector. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0020] Figure 1 One of the structural schematic diagrams of a disconnector provided by an embodiment of the present application;
[0021] Figure 2 Two of the structural schematic diagrams of a disconnector provided by an embodiment of the present application;
[0022] Figure 3 Three of the structural schematic diagrams of a disconnector provided by an embodiment of the present application;
[0023] Figure 4 Four of the structural schematic diagrams of a disconnector provided by an embodiment of the present application;
[0024] Figure 5 Five of the structural schematic diagrams of a disconnector provided by an embodiment of the present application;
[0025] Figure 6 Six of the structural schematic diagrams of a disconnector provided by an embodiment of the present application;
[0026] Figure 7 Seven of the structural schematic diagrams of a disconnector provided by an embodiment of the present application;
[0027] Figure 8 Eight of the structural schematic diagrams of a disconnector provided by an embodiment of the present application;
[0028] Figure 9 Nine of the structural schematic diagrams of a disconnector provided by an embodiment of the present application;
[0029] Figure 10 One of the structural schematic diagrams of the tripping mechanism of a disconnector provided by an embodiment of the present application;
[0030] Figure 11 The second structural schematic diagram of a trip mechanism of a disconnector provided by an embodiment of the present application;
[0031] Figure 12 The external view schematic diagram of a disconnector provided by an embodiment of the present application;
[0032] Figure 13 The tenth structural schematic diagram of a disconnector provided by an embodiment of the present application;
[0033] Figure 14 The structural schematic diagram of a power supply system provided by an embodiment of the present application.
[0034] Icon: 10 - disconnector; 10A - body; 11 - first body unit; 12 - second body unit; 13 - rotation center axis; 20 - handle; 30 - operating mechanism; 32 - trip device; 321 - fixing part; 322 - striking part; 33 - driving part; 34 - linkage mechanism; 40 - linkage mechanism; 101 - DC input terminal; 102 - DC output terminal; 103 - power conversion unit; 104 - AC output terminal; 105 - wire; L - length; H - height; T - thickness. Detailed implementation manners
[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0036] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. It should be noted that, without conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the protection scope of the present application.
[0037] It should be noted that: similar reference numerals and letters denote similar items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in the subsequent accompanying drawings.
[0038] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is customarily placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0039] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0040] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0041] Photovoltaic inverters of each manufacturer connect photovoltaic strings to the inverter through different stringing methods. Due to different numbers of strings, the current-carrying capacity of each disconnect switch is also different. In order to meet all requirements, the disconnect switch must be designed with a maximum current for the frame. When the current-carrying capacity is small, it causes functional redundancy and also wastes costs.
[0042] To solve the above problems, on the one hand of the embodiments of the present application, with reference to Figure 1 , a disconnect switch 10 is provided, which at least includes a stacked first body unit 11 and a second body unit 12, and the current-carrying capacities of the first body unit 11 and the second body unit 12 during operation are different.
[0043] The disconnect switch 10 generally includes a handle 20, an operating mechanism 30, and a body unit. The operating mechanism 30 and the body unit are located inside the power supply system, and the operating handle 20 can drive the body unit to perform opening and closing actions through the operating mechanism 30. Generally, the handle 20 is located outside the power supply system and is connected to the mechanism for easy operation.
[0044] Among them, the body unit has at least two layers, and the current-carrying capacities of at least two layers of body units are different when working. That is to say, when the disconnector 10 is working, the current values flowing through at least two layers of body units are different. In this way, body units applicable to different current values can be designed according to different needs to be compatible with the current requirements of different busbar connection methods, so that each layer of body unit can be utilized to the greatest extent, avoiding unnecessary waste, effectively reducing the overall size of the disconnector 10, making it better adapted to the power supply system, and at the same time reducing the cost of the disconnector 10.
[0045] In this application, taking a multi-layer body unit as an example, there are two specifications of body units in the multi-layer body unit, namely the first body unit 11 and the second body unit 12, corresponding to different current-carrying capacities respectively.
[0046] The current-carrying capacity of the body unit is related to the sizes of the moving contact and the static contact in the body unit. Generally speaking, the larger the sizes of the moving contact and the static contact are, the larger the current-carrying capacity flowing through the moving contact and the static contact is.
[0047] When the current-carrying capacity of the first moving contact of the first body unit 11 is L1 and the volume is V1, and the current-carrying capacity of the second moving contact of the second body unit 12 is L2 and the volume is V2, when the ratio of L1 to L2 is greater than 1.2 or less than 0.8, V2 is not equal to V1;
[0048] And / or, the current-carrying capacity of the first static contact of the first body unit 11 is L3 and the volume is V3, and the current-carrying capacity of the second static contact of the second body unit 12 is L4 and the volume is V4. When the ratio of L3 to L4 is greater than 1.2 or less than 0.8, V4 is not equal to V3.
[0049] It can be seen that when the volume of at least one of the moving contact and the static contact is not equal, the current-carrying capacities of the corresponding body units are different.
[0050] On this basis, when the sizes of the moving contact and the static contact increase, in order to enable the body unit to obtain better heat dissipation, the size of the body unit also increases accordingly.
[0051] The current-carrying capacity of the first body unit 11 is L5 and the volume is V5, and the current-carrying capacity of the second body unit 12 is L6 and the volume is V6. When the ratio of L5 to L6 is greater than 1.2 or less than 0.8, V6 is not equal to V5.
[0052] When the ratios of L1 to L2, L3 to L4, and L5 to L6 exceed the above range, the current-carrying capacities of the first body unit 11 and the second body unit 12 are basically close. The first body unit 11 and the second body unit 12 can be set to the same volume to meet the requirements of the current gear standard, control the cost, and meet the demand for high cost performance.
[0053] Under the same structure, the size of the body unit with a small current-carrying capacity must be smaller than that of the body unit with a large current-carrying capacity. Reducing the current-carrying capacity means that thinner and fewer current-carrying copper bars can be used, which can effectively reduce the cost of the disconnector 10.
[0054] As mentioned above, when the volumes of the body units are different, the current-carrying capacities are different. The volume is composed of the dimensions in three directions: length, height H, and thickness T. Therefore, when at least one of these three dimensions is not equal, the current-carrying capacity is also not equal.
[0055] Specifically, the first body unit 11 and the second body unit 12 are stacked along any two of the three directions of length L, height H, and thickness T. When the dimensions of the first body unit 11 and the second body unit 12 in two directions are respectively equal, the dimension of the first body unit 11 in the remaining one direction is an integer multiple of the dimension of the second body unit 12 in the remaining one direction. In this way, the first body unit 11 and the second body unit 12 are aligned in the two directions with equal dimensions, and the remaining one dimension is set as an integer multiple, which can ensure that the multi-layer body units can also be aligned in this dimension direction to ensure the aesthetic appearance of the product.
[0056] When the first body unit 11 and the second body unit 12 are stacked along any two directions, the quantity of at least one of the first body unit 11 and the second body unit 12 is greater than or equal to 2.
[0057] For example, as Figures 1 to 4 , one first body unit 11 and multiple second body units 12 are stacked along the height H and thickness T directions. The length L of the first body unit 11 is equal to the length L of the second body unit 12, the height H of the first body unit 11 is equal to the height H of the second body unit 12, and the thickness T of the first body unit 11 is an integer multiple of the thickness T of the second body unit 12.
[0058] Figures 1 to 4 In, the thickness T of the first body unit 11 is twice the thickness T of the second body unit 12. By increasing the thickness T of the first body unit 11, the thickness T of the first moving contact and / or the first static contact in the first body unit 11 can be increased to improve the current-carrying capacity of the first body unit 11.
[0059] There is one first body unit 11 and eight second body units 12. The eight second body units 12 are stacked along the height H direction and the thickness T direction respectively. The first body unit 11 is located at different positions of the eight stacked second body units 12. Due to the setting of the integer multiple of the thickness T, the overall size of the module formed by all body units is regular.
[0060] Or, for example, as Figures 5 to 8, the first body unit 11 and the second body unit 12 are stacked along the thickness T direction, and multiple second body units 12 are also stacked along the height H direction. The length L of the first body unit 11 is equal to the length L of the second body unit 12, the thickness T of the first body unit 11 is equal to the thickness T of the second body unit 12, and the height H of the first body unit 11 is an integer multiple of the height H of the second body unit 12.
[0061] Figures 5 to 8 Among them, the height H of the first body unit 11 is twice the height H of the second body unit 12. There is one first body unit 11 and eight second body units 12. The eight second body units 12 are stacked along the height H direction and the thickness T direction respectively. The first body unit 11 is located at different positions of the eight stacked second body units 12. Due to the setting of the integer multiple of the height H, the overall size of the module formed by all body units is regular.
[0062] In the above example, multiple body units are stacked. The first body unit 11 and the second body unit 12 are combined in different ways to meet the requirements of different current collection methods; at the same time, the operating handle 20 can drive the operating mechanism 30 to drive the body unit to perform opening and closing operations.
[0063] In some other embodiments, when the first body unit 11 and the second body unit 12 are stacked along the same height H direction, as Figure 9 In the example, there are multiple second body units 12. One first body unit 11 and multiple second body units 12 are stacked along the height H direction. The length L and the thickness T of the first body unit 11 and the second body unit 12 are respectively equal, and the height H of the first body unit 11 is greater than the height H of the second body unit 12 to ensure the aesthetic appearance.
[0064] In addition, referring to Figure 10 、 Figure 11 As shown, it further includes a tripping mechanism. The tripping mechanism is linked with the operating mechanism 30 and is used to drive the operating mechanism 30 to open and close when the handle 20 is jammed.
[0065] Specifically, the operating mechanism 30 includes a link mechanism 34. The tripping mechanism is located on one side of the link mechanism 34. The tripping mechanism includes a trip 32 and a driving member 33. The driving member 33 abuts against the link mechanism 34. The trip 32 includes a fixed part 321 and a slidable striking member 322. When the trip 32 receives a breaking signal sent by the controller, the striking member 322 slides out relative to the fixed part 321 and drives the link mechanism 34 to unlock and open through the driving member 33. For details, reference can be made to the authorized patent CN219534378U, which will not be elaborated here.
[0066] As Figure 12 、 Figure 13As shown, the operating mechanism 30 is connected to the body unit through the linkage mechanism 40. The linkage mechanism 40 extends into the body units of different layers to drive the rotation center axis 13 of the body unit to act, enabling the synchronous opening and closing of each body unit.
[0067] In addition, multiple body units form the body 10A. Among them, the arrangement direction A2 of the body 10A, the operating mechanism 30, and the handle 20 is parallel or perpendicular to the axis direction A1 of the rotation center axis 13 of the body unit.
[0068] In this application Figure 12 , Figure 13 A1 and A2 are perpendicular to each other; in other embodiments, the two can also be arranged parallel to each other.
[0069] On the other hand, referring to Figure 14 , this embodiment of the application also discloses a power supply system, which includes the disconnecting switch 10 as described in any one of the above, and further includes a DC input terminal 101, a DC output terminal 102, and a power conversion unit 103. The DC input terminal 101 is connected to the disconnecting switch 10, and the disconnecting switch 10 is connected to the power conversion unit 103 through the DC output terminal 102. Direct current is input from the DC input terminal 101, passes through the disconnecting switch 10 and the DC output terminal 102, and is input into the power conversion unit 103. The power conversion unit 103 is used to convert direct current into alternating current.
[0070] The disconnecting switch 10 is respectively connected to the DC input terminal 101 and the DC output terminal 102. The DC input terminal 101 is used for the input of direct current, and the DC output terminal 102 is also connected to the power conversion unit 103, so that direct current is sequentially input into the power conversion unit 103 through the DC input terminal 101, the disconnecting switch 10, and the DC output terminal 102, completing the conversion of direct current to alternating current. The obtained alternating current is then output through the AC output terminal 104 for use in AC application scenarios.
[0071] Furthermore, when the disconnecting switch 10 is applied to the power supply system, the operating mechanism 30 and the body unit of the disconnecting switch 10 are both located inside the power supply system, and the handle 20 of the disconnecting switch 10 is located outside the power supply system for convenient operation.
[0072] The disconnecting switch 10 is respectively connected to the DC input terminal 101 and the DC output terminal 102 through the wire 105. Before the wire 105 converges into the body unit of the disconnecting switch 10 at the DC input terminal 101, at least one group of wires 105 performs current collection.
[0073] Figure 14Among them, three groups of wire 105 for current collection are formed, where two wires 105 in one group are for current collection, three wires 105 in another group are for current collection, and four wires 105 in the other group are for current collection. The three groups of current-collecting wires 105 are connected to the isolating switch by the DC input terminal 101, and then the isolating switch connects the three groups of current-collecting wires 105 to the DC output terminal 102. The current collection of the wires 105 is to match the body units with different current-carrying capacities and avoid that a single wire 105 cannot carry the body unit with a large current-carrying capacity.
[0074] This power supply system includes the same structure and beneficial effects as the isolating switch 10 in the foregoing embodiment. The structure and beneficial effects of the isolating switch 10 have been described in detail in the foregoing embodiment and will not be repeated here.
[0075] The foregoing is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. An isolating switch, characterized in that: It comprises at least a stacked first body unit (11) and a second body unit (12); the first body unit (11) and the second body unit (12) have different current carrying capacities when in operation.
2. The isolating switch according to claim 1, characterized in that: The first moving contact of the first body unit (11) has a current carrying capacity of L1 and a volume of V1, and the second moving contact of the second body unit (12) has a current carrying capacity of L2 and a volume of V2, and when the ratio of L1 to L2 is greater than 1.2 or less than 0.8, V2 is not equal to V1; And / or, the current carrying capacity of the first static contact of the first main body unit (11) is L3 and the volume is V3, and the current carrying capacity of the second static contact of the second main body unit (12) is L4 and the volume is V4, and when the ratio of L3 to L4 is greater than 1.2 or less than 0.8, V4 is not equal to V3.
3. The isolating switch according to claim 2, characterized in that: The first body unit (11) has a current carrying capacity of L5 and a volume of V5, and the second body unit (12) has a current carrying capacity of L6 and a volume of V6. When the ratio of L5 to L6 is greater than 1.2 or less than 0.8, V6 is not equal to V5.
4. The isolating switch according to claim 3, characterized in that: The first body unit (11) and the second body unit (12) are stacked along any two directions of the three directions of length (L), height (H) and thickness (T); when the dimensions of the first body unit (11) and the second body unit (12) in two directions are respectively equal, the dimension of the first body unit (11) in the remaining direction is an integer multiple of the dimension of the second body unit (12) in the remaining direction.
5. The isolating switch according to claim 3, characterized in that: When the first body unit (11) and the second body unit (12) are stacked along a height (H) direction, the length (L) and thickness (T) of the first body unit (11) and the second body unit (12) are respectively equal, and the height (H) of the first body unit (11) is greater than the height (H) of the second body unit (12).
6. The isolating switch according to any one of claims 1 to 5, characterized in that: It comprises a handle (20) and an operating mechanism (30), wherein the handle (20), the operating mechanism (30) and a main body unit are connected in sequence; It also comprises a tripping mechanism linked to the operating mechanism (30) and used for driving the operating mechanism (30) to open and close the switch when the handle (20) is stuck.
7. The isolating switch according to claim 6, characterized in that: The axial direction A1 of the rotation center axis (13) of the main body unit is parallel or perpendicular to the arrangement direction A2 of the main body (10A), the operating mechanism (30) and the handle (20).
8. A power supply system, characterized in that: The isolating switch (10) comprises the isolating switch (10) as claimed in any one of claims 1 to 7, and further comprises a DC input terminal (101), a DC output terminal (102) and a power conversion unit (103), wherein the DC input terminal (101) is connected to the isolating switch (10), and the isolating switch (10) is connected to the power conversion unit (103) via the DC output terminal (102), DC power is input from the DC input terminal (101), and is input into the power conversion unit (103) via the isolating switch (10) and the DC output terminal (102), and the power conversion unit (103) is used to convert the DC power into AC power.
9. The power supply system according to claim 8, characterized in that: The operating mechanism (30) and the main body unit of the isolating switch (10) are both located inside the power supply system, and the handle (20) of the isolating switch (10) is located outside the power supply system.
10. The power supply system according to claim 8, characterized in that: The isolating switch (10) is respectively connected to the DC input end (101) and the DC output end (102) via wires (105); before the wires (105) are merged into the main body unit of the isolating switch (10) at the DC input end (101), at least one group of the wires (105) is merged.