Photovoltaic inverter and rotary switch

Abstract

Provided in the present application are a photovoltaic inverter and a rotary switch. The photovoltaic inverter comprises a rotary switch, wherein the rotary switch comprises a switch body; the switch body comprises an insulating housing and a plurality of pins; the ends of the plurality of pins extending to the outside of the insulating housing are connected to a circuit board; the rotary switch is a multi-pole switch; each pole of the rotary switch comprises two pins; and a groove or a boss is provided on the insulating housing between two pins of two adjacent poles located on the same side; alternatively, a surrounding rib surrounds the portion of each pin located between the insulating housing and the circuit board. On the basis of the solution, the creepage distance and the electrical clearance between the pins of two adjacent poles are increased, thereby ensuring the electrical stability and performance of the photovoltaic inverter and facilitating the miniaturization of the photovoltaic inverter and the rotary switch.

Description

Photovoltaic inverters and rotary switches

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on September 5, 2023, with application number 202322409989.9 and invention name “Photovoltaic Inverter and Rotary Switch”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of photovoltaic technology, and in particular to a photovoltaic inverter and a rotary switch. Background Art

[0003] In photovoltaic power generation systems, a photovoltaic inverter converts direct current (DC) power from the photovoltaic input into alternating current (AC). Users can control the photovoltaic input on and off using a rotary switch. However, in high-voltage environments, achieving insulation between the positive and negative poles of the photovoltaic inverter's rotary switch may increase the thickness of the rotary switch, hindering the miniaturization of both the rotary switch and the photovoltaic inverter.

[0004] Summary of the Invention

[0005] The present application provides a photovoltaic inverter and a rotary switch. A groove or a boss is provided on the insulating housing between two pins located on the same side of two adjacent poles of the rotary switch, or a rib is surrounded by the portion of each pin located between the insulating housing and the circuit board, thereby increasing the creepage distance and electrical clearance between the pins of the two adjacent poles, thereby ensuring the electrical stability and performance of the photovoltaic inverter, and facilitating the miniaturization of the photovoltaic inverter and the rotary switch.

[0006] In a first aspect, a photovoltaic inverter is provided, comprising: a rotary switch, the rotary switch comprising a switch body, the switch body comprising an insulating housing and a plurality of pins, the plurality of pins extending from a side of the insulating housing close to the circuit board to outside the insulating housing; the rotary switch being a multi-pole switch, each pole of the rotary switch comprising two pins, a groove being provided on the insulating housing between two pins located on the same side of two adjacent poles, the opening of the groove being located on a side of the insulating housing where the plurality of pins are located, or a boss being formed on an outer side wall of the insulating housing, the boss being located between two pins located on the same side of the two adjacent poles.

[0007] In the embodiments of the present application, by adding grooves or bosses between adjacent pins, the creepage distance or electrical clearance between pins on the same side can be increased, thereby ensuring the electrical stability and performance of the photovoltaic inverter. Furthermore, due to the presence of the grooves or bosses, the creepage distance and electrical clearance between pins on the same side are increased, and the distance between the pins can be reduced, which facilitates the miniaturization of the rotary switch and photovoltaic inverter.

[0008] In combination with the first aspect, in a possible implementation, the photovoltaic inverter further includes a circuit board, the portion of the multiple pins extending outside the insulating housing is located between the insulating housing and the circuit board, and one end of the multiple pins extending outside the insulating housing is connected to a side of the circuit board close to the insulating housing.

[0009] In combination with the first aspect, in a possible implementation, the photovoltaic inverter further includes a shell, the circuit board is located in a accommodating cavity surrounded by the shell, the circuit board divides the accommodating cavity surrounded by the shell into a first chamber and a second chamber, the first chamber is a accommodating space surrounded by the circuit board, the bottom plate of the shell and the side plate of the shell, the second chamber is a accommodating space surrounded by the circuit board, the top plate of the shell and the side plate of the shell, the distance between the circuit board and the bottom plate is greater than the distance between the circuit board and the top plate, the height of the electrical component connected to the side of the circuit board close to the bottom plate is greater than or equal to a first preset value, the height of the electrical component connected to the side of the circuit board close to the top plate is less than or equal to a second preset value, the first preset value is greater than the second preset value, and the switch body is located in the first chamber.

[0010] In combination with the first aspect, in a possible implementation, a plurality of through holes are provided on the side wall of the insulating shell close to the circuit board, the plurality of pins correspond one-to-one to the plurality of through holes, and the plurality of pins extend out of the insulating shell through the plurality of through holes.

[0011] In combination with the first aspect, in a possible implementation, the plurality of pins are connected to the circuit board by welding.

[0012] In combination with the first aspect, in a possible implementation, the number of the grooves between the first pin and the second pin is one or more, or the number of the bosses between the first pin and the second pin is one or more.

[0013] In a second aspect, a photovoltaic inverter is provided, comprising: a rotary switch, the rotary switch comprising a switch body, the switch body comprising an insulating shell and a plurality of pins, the plurality of pins extending out of the insulating shell; the insulating shell further comprising a plurality of ribs, the plurality of ribs protruding from an outer side wall of the insulating shell, the plurality of ribs corresponding one-to-one to the plurality of pins; the rotary switch being a multi-pole switch, each pole of the rotary switch comprising two pins, at least a portion of the plurality of ribs being located between two pins located on the same side of two adjacent poles.

[0014] In the embodiments of the present application, at least a portion of the plurality of ribs is located between two pins on the same side of adjacent poles, thereby increasing the creepage distance and electrical clearance between the pins on the same side, thereby ensuring the electrical stability and performance of the photovoltaic inverter. Furthermore, the presence of the ribs increases the creepage distance and electrical clearance between the pins on the same side, allowing the distance between the pins on the same side to be smaller, which facilitates the miniaturization of the rotary switch and photovoltaic inverter.

[0015] In combination with the second aspect, in a possible implementation, the photovoltaic inverter further includes a circuit board, the portion of the multiple pins extending outside the insulating housing is located between the insulating housing and the circuit board, and one end of the multiple pins extending outside the insulating housing is connected to a side of the circuit board close to the insulating housing.

[0016] In combination with the second aspect, in a possible implementation, the first surrounding rib surrounds the outer circumference of a portion of the first pin located between the insulating housing and the circuit board.

[0017] In the embodiment of the present application, the ribs surround the outer circumference of the portion of the pin extending outside the shell, which can increase the creepage distance and electrical clearance between the pin and surrounding conductive parts (for example, other pins), which is beneficial to comprehensively improve the electrical stability and performance of the photovoltaic inverter.

[0018] In combination with the second aspect, in a possible implementation, a groove is provided on the insulating shell between two adjacent ribs, the opening of the groove is located on the side of the insulating shell where the multiple pins are located, and the two adjacent ribs are two ribs corresponding to the two pins located on the same side of the two adjacent poles.

[0019] In the application embodiment, a groove may be provided between two pins located on the same side of two adjacent poles to further increase the creepage distance between the pins located on the same side, which is beneficial to further improve the electrical stability and performance of the photovoltaic inverter.

[0020] In combination with the second aspect, in a possible implementation, the insulating shell further includes a boss, which is located on a side of the insulating shell close to the circuit board, and the boss is located between two adjacent ribs, and the two adjacent ribs are two ribs corresponding to the two pins located on the same side of the two adjacent poles.

[0021] In the application embodiment, a boss may be provided between two pins located on the same side of adjacent poles to further increase the creepage distance and electrical clearance between the pins located on the same side, which is beneficial to further improve the electrical stability and performance of the photovoltaic inverter.

[0022] In a third aspect, a rotary switch is provided, comprising: a switch body, the switch body comprising an insulating shell and a plurality of pins, the plurality of pins being located in a accommodating cavity surrounded by the insulating shell, and the plurality of pins extending outside the insulating shell, the plurality of pins extending to one end of the insulating shell being used to connect to a circuit board of a photovoltaic inverter; the rotary switch being a multi-pole switch, each pole of the rotary switch comprising two pins, a groove being provided on the insulating shell between two pins located on the same side of two adjacent poles, the opening of the groove being located on a side of the insulating shell where the plurality of pins are located, or the insulating shell comprising a boss, the boss being located on a side of the insulating shell close to the circuit board, the boss being located between two pins located on the same side of the two adjacent poles.

[0023] It should be understood that the beneficial effects of the third aspect and any possible implementation method of the third aspect can be referred to the relevant description of the first aspect and will not be repeated here.

[0024] In combination with the third aspect, in a possible implementation, the photovoltaic inverter also includes a shell, the circuit board is located in a accommodating cavity surrounded by the shell, the circuit board divides the accommodating cavity surrounded by the shell into a first chamber and a second chamber, the first chamber is a accommodating space surrounded by the circuit board, the bottom plate of the shell and the side plate of the shell, the second chamber is a accommodating space surrounded by the circuit board, the top plate of the shell and the side plate of the shell, the distance between the circuit board and the bottom plate is greater than the distance between the circuit board and the top plate, the height of the electrical component connected to the side of the circuit board close to the bottom plate is greater than or equal to a first preset value, the height of the electrical component connected to the side of the circuit board close to the top plate is less than or equal to a second preset value, the first preset value is greater than the second preset value, and the switch body is located in the first chamber.

[0025] In a fourth aspect, a rotary switch is provided, comprising: a switch body, the switch body comprising an insulating shell and a plurality of pins, the plurality of pins being located in a accommodating cavity surrounded by the insulating shell, and the plurality of pins extending out of the insulating shell, and one end of the plurality of pins extending out of the insulating shell being used to connect to a circuit board of a photovoltaic inverter; the insulating shell further comprising a plurality of ribs, the plurality of ribs protruding from a side wall of the insulating shell close to the circuit board, the plurality of ribs corresponding one-to-one to the plurality of pins; the rotary switch is a multi-pole switch, each pole of the rotary switch comprises two pins, and at least a portion of the plurality of ribs is located between two pins located on the same side of two adjacent poles.

[0026] It should be understood that the beneficial effects of the fourth aspect and any possible implementation method of the fourth aspect can be referred to the relevant description of the second aspect and will not be repeated here.

[0027] In combination with the fourth aspect, in a possible implementation, a groove is provided on the insulating shell between two adjacent ribs, the opening of the groove is located on the side of the insulating shell where the multiple pins are located, and the two adjacent ribs are two ribs corresponding to the two pins located on the same side of the two adjacent poles.

[0028] In combination with the fourth aspect, in a possible implementation, the insulating shell further includes a boss, which is located on a side of the insulating shell close to the circuit board, and the boss is located between two adjacent ribs, and the two adjacent ribs are two ribs corresponding to the two pins located on the same side of the two adjacent poles. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of a photovoltaic power generation system provided in an embodiment of the present application.

[0030] FIG2 is a schematic diagram of the structure of a photovoltaic inverter provided in an embodiment of the present application.

[0031] FIG3 is a schematic diagram of a circuit structure of a photovoltaic inverter provided in an embodiment of the present application.

[0032] FIG4 is a schematic diagram of the structure of a photovoltaic inverter provided in an embodiment of the present application.

[0033] FIG5 is a schematic diagram of the structure of a switch body provided in an embodiment of the present application.

[0034] FIG6 is a schematic diagram of the structure of another switch body provided in an embodiment of the present application.

[0035] FIG7 is a schematic diagram of the structure of another switch body provided in an embodiment of the present application.

[0036] FIG8 is a schematic diagram of the structure of another switch body provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solution in this application will be described below with reference to the accompanying drawings.

[0038] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in this article is merely a way to describe the association relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0039] In the embodiments of the present application, prefixes such as "first", "second", and "third" are used only to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. In the embodiments of the present application, the use of prefixes such as ordinal numbers to distinguish description objects does not constitute a limitation on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and no unnecessary limitations should be constituted due to the use of such prefixes. In addition, in the description of this embodiment, unless otherwise specified, the meaning of "plurality" is two or more.

[0040] The terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", etc. in the embodiments of the present application indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present application.

[0041] References to "some embodiments" and the like in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in some embodiments" and the like that appear in different places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0042] The “perpendicular” mentioned in this application is not strictly perpendicular, but within the allowable error range. The “parallel” is not strictly parallel, but within the allowable error range.

[0043] In the embodiments of this application, the same reference numerals represent the same component or part. In the embodiments of this application, for multiple identical parts, only one of the parts may be labeled with a reference numeral in the drawings as an example. The same reference numerals apply to other identical parts or components. In addition, the sizes and dimensions of the parts shown in the drawings are for illustrative purposes only.

[0044] The photovoltaic power generation system provided in the embodiment of the present application will be described in detail below with reference to FIG1 .

[0045] FIG1 is a schematic diagram of a photovoltaic power generation system according to an embodiment of the present application. As shown in FIG1 , the photovoltaic power generation system may include: a photovoltaic module 10 , a photovoltaic inverter 20 , and an energy storage system 30 .

[0046] Optionally, the photovoltaic power generation system may further include: a power grid 40 and a load 50 .

[0047] Specifically, the photovoltaic inverter 20 can convert the direct current from the photovoltaic assembly 10 into alternating current, and transmit the alternating current to the grid 40 or the load 50. The photovoltaic inverter 20 can transmit the direct current from the photovoltaic assembly 10 to the energy storage system 30 to charge the energy storage system 30. The photovoltaic inverter 20 can convert the direct current from the energy storage system 30 into alternating current, and transmit the alternating current to the grid 40 or the load 50.

[0048] It can be understood that when the photovoltaic power generation system includes a photovoltaic module 10, a photovoltaic inverter 20, and an energy storage system 30, the photovoltaic inverter 20 is mainly used to connect the photovoltaic module 10 and the energy storage system 30 so that the energy storage system 30 can be charged. When the photovoltaic power generation system includes a photovoltaic module 10, a photovoltaic inverter 20, an energy storage system 30, a power grid 40, and a load 50, the photovoltaic inverter 20 can be used to connect the above devices. For example, the photovoltaic inverter 20 connects the photovoltaic module 10 to the energy storage system 30; the photovoltaic inverter 20 connects the photovoltaic module 10 to the power grid 40; the photovoltaic inverter 20 connects the photovoltaic module 10 to the load 50; the photovoltaic inverter 20 connects the load 50 to the energy storage system 30, etc.

[0049] The energy storage system 30 in the photovoltaic power generation system can store and release electrical energy. For example, the energy storage system 30 can store DC power from the photovoltaic modules 10 and supply power to the power grid 40 or the load 50 via the photovoltaic inverter 20. Therefore, the energy storage system 30 has a wide range of application scenarios, including but not limited to household applications, industrial green power applications, and smart photovoltaic power station applications.

[0050] As can be seen from the above description, the photovoltaic inverter 20 is a converter that can convert direct current into alternating current. Exemplarily, the photovoltaic inverter 20 may include two DC ports (e.g., DC port 1 and DC port 2) and one AC port. The two DC ports are respectively used to connect the photovoltaic module 10 and the energy storage system 30. For example, DC port 1 is used to connect the photovoltaic module 10, and DC port 2 is used to connect the energy storage system 30. The AC port can be used to connect to the power grid 40 or the load 50.

[0051] The PV module 10 can feed power to the grid 40 and supply power to the load 50 via the DC port 1. The energy storage system 30 can supply power to the load 50 via the DC port 2. The grid 40 can supply power to the load 50 via the AC port. In other words, the PV inverter 20 serves as a connection hub between the load 50 and the energy module (which may include the PV module 10, the energy storage system 30, and the grid 40).

[0052] Figure 2 is a top view of a photovoltaic inverter 100 provided in an embodiment of the present application. Figure 3 is a schematic diagram of the circuit structure of a photovoltaic inverter provided in an embodiment of the present application. The photovoltaic inverter 100 shown in Figure 2 can be an exemplary structure of the photovoltaic inverter 20 shown in Figure 1.

[0053] Referring to Figure 2, in a photovoltaic power generation system, a photovoltaic inverter 100 includes components such as a housing 110, a circuit board 120, a rotary switch 130, a photovoltaic connector 140, and an AC connector 150. The circuit board 120 is located within the cavity enclosed by the housing 110 and primarily functions to convert direct current (DC) to alternating current (AC). The rotary switch 130 primarily switches the current on and off. The AC connector 150 transmits the AC power to the grid and / or load. One end of the photovoltaic connector 140 is connected to the circuit board 120, and the other end is connected to a photovoltaic module (or photovoltaic string). The photovoltaic connector 140 is used to input the DC power generated by the photovoltaic module using solar energy into the circuit board 120. The photovoltaic connector 140 may include multiple positive connectors and multiple negative connectors, with each positive connector corresponding to the multiple negative connectors. The positive connector can be connected to the positive terminal of a photovoltaic module, and the corresponding negative connector can be connected to the negative terminal of the photovoltaic module, thereby allowing the DC power generated by the photovoltaic module using solar energy to be input to the circuit board 120.

[0054] In the embodiment of the present application, components such as the rotary switch 130, the photovoltaic connector 140, and the AC connector 150 are all connected to the circuit board 120. These components can be interconnected via metal traces on the circuit board 120, forming the circuit structure shown in Figure 3. This allows for cable-free connection between the rotary switch 130, the photovoltaic connector 140, the AC connector 150, and the circuit board 120, thereby improving the space utilization of the photovoltaic inverter.

[0055] In one example, circuit board 120 may include an inverter circuit (DC / AC circuit) for converting direct current into alternating current. Rotary switch 130 is located between photovoltaic connector 140 and the DC / AC circuit, thereby controlling the current flow between photovoltaic connector 140 and the DC / AC circuit, thereby controlling the photovoltaic (direct current) input.

[0056] In another example, circuit board 120 may further include a DC / DC circuit for converting direct current (DC) power of one voltage value to direct current (DC) power of another voltage value, with the output of the DC / DC circuit connected to the input of the DC / AC circuit. One end of rotary switch 130 is electrically connected to photovoltaic connector 140, and the other end of rotary switch 130 is electrically connected to the DC / DC circuit, thereby controlling the photovoltaic (DC) power input.

[0057] It should be understood that in order to realize the functions of the photovoltaic inverter 100, the circuit board 120 may also include other circuits, such as a rectifier circuit (AC / DC circuit) for converting alternating current into direct current, etc. The embodiment of the present application does not limit the type and number of circuits set on the circuit board 120.

[0058] In the present application, the circuit board 120 may also be referred to as a printed circuit board or a mainboard. The printed circuit board is a support for electronic components and also serves as a carrier for electrical connections of the electronic components. Generally, a printed circuit board without soldered electronic components may be referred to as a PCB. A printed circuit board with soldered electronic components may be referred to as a printed circuit board assembly (PCBA). Conductive patterns or metal traces are provided on the circuit board, and the electronic components may be electrically connected through the conductive patterns or metal traces. The electronic components carried on the circuit board may form a plurality of functional modules to realize corresponding functions, for example, an inverter circuit module is used to convert direct current into alternating current, a rectifier circuit module is used to convert alternating current into direct current, and the like.

[0059] Figure 4 is a schematic diagram of the structure of a photovoltaic inverter provided in an embodiment of the present application. Figure 5 is a schematic diagram of the structure of a switch body provided in an embodiment of the present application.

[0060] 2 and 4 , the photovoltaic inverter 100 may include a housing 110, a circuit board 120, and a rotary switch 130. The housing 110 may include a top plate, a bottom plate, and side plates. The top plate, bottom plate, and side plates of the housing 110 may enclose a receiving cavity, wherein the top plate and bottom plate of the housing 110 are disposed opposite each other.

[0061] The circuit board 120 is located in the housing cavity enclosed by the housing 110, and the circuit board 120 divides the housing cavity enclosed by the housing 110 into a first chamber and a second chamber. The first chamber is the housing space enclosed by the bottom plate of the housing 110, the side plates of the housing 110, and the circuit board 120, while the second chamber is the housing space enclosed by the top plate of the housing 110, the side plates of the housing 110, and the circuit board 120. Furthermore, the distance between the circuit board 120 and the bottom plate of the housing 110 is greater than the distance between the circuit board 120 and the top plate of the housing 110, i.e., the height of the first chamber is greater than the height of the second chamber.

[0062] In some embodiments, the circuit board 120 is parallel to the bottom plate and / or top plate of the housing 110 .

[0063] In this embodiment of the present application, electrical components are mounted on both sides of the circuit board 120. Specifically, some of the electrical components are located in the first chamber and connected to the side of the circuit board 120 that is close to the bottom plate of the housing 110; another portion of the electrical components are located in the second chamber and connected to the side of the circuit board 120 that is close to the top plate of the housing 110.

[0064] Specifically, the first chamber can be used to accommodate some large, tall, or high-power electrical components, such as power inductors, busbar capacitors, power modules, and switching tubes. The second chamber can be used to accommodate some small, short, or low-power electrical components, such as chip capacitors, chip resistors, indicator lights, and other small electrical components.

[0065] In some embodiments, the photovoltaic inverter 100 may further include a heat sink connected to the side of the bottom plate of the housing 110 away from the circuit board 120. This improves heat dissipation for the electrical components in the first chamber. Large electrical components have high power and generate a lot of heat. Mounting these large electrical components on the side of the circuit board 120 closer to the bottom plate of the housing 110 helps improve the heat dissipation of the photovoltaic inverter.

[0066] In some embodiments, the first cavity is configured to accommodate electrical components having a height greater than or equal to a first preset value, and the second cavity is configured to accommodate electrical components having a height less than or equal to a second preset value, where the first preset value is greater than the second preset value. In other words, the height of the electrical components connected to the side of the circuit board closest to the bottom plate is greater than or equal to the first preset value, while the height of the electrical components connected to the side of the circuit board closest to the top plate is less than or equal to the second preset value.

[0067] It should be understood that the first preset value and the second preset value may be preset by a technician. For example, the first preset value may be approximately 9 mm, and the second preset value may be approximately 5 mm.

[0068] It should be understood that conductive patterns or metal traces are provided on both sides of the circuit board 120 .

[0069] It should be understood that the first cavity can also accommodate smaller, lower-height electrical components, such as small but high-heat-generating electrical components. Specifically, the height of the electrical components connected to the side of the circuit board 120 near the base plate can also be less than the first predetermined value. However, due to the height restrictions of the first and second cavities, the first and second cavities cannot accommodate electrical components exceeding the height restrictions.

[0070] It should be understood that, according to actual needs, the electrical components connected to the circuit board 120 can be reasonably arranged on both sides of the circuit board 120 to improve the space utilization of the photovoltaic inverter and enhance the heat dissipation effect of the photovoltaic inverter.

[0071] As shown in FIG4 , the rotary switch 130 includes a switch body 131 and a handle assembly 132. The switch body 131 is located in the first chamber and may include a plurality of pins, through which the switch body 131 is connected to the circuit board 120.

[0072] In one example, the plurality of pins of the switch body 131 may be connected to the circuit board 120 by welding. As shown in FIG. 4 , the black-filled semicircle patterns represent the soldering points between the pins and the circuit board 120 .

[0073] 4 and 5 , the rotary switch 130 in the present application may be a multi-pole switch, and each pole of the rotary switch 130 may include two pins. For example, the rotary switch 130 is a bipolar switch, wherein the first pole of the rotary switch 130 includes a first pin 1311 and a third pin 1313, and the second pole of the rotary switch 130 includes a second pin 1312 and a fourth pin 1314.

[0074] For each pole of the rotary switch 130, one pin is electrically connected to the photovoltaic connector 140 via a metal trace on the circuit board 120, and the other pin is electrically connected to the inverter circuit (or DC / DC circuit, etc.) via a metal trace on the circuit board 120. For example, the third pin 1313 of the first pole and the fourth pin 1314 of the second pole are connected to the input side of the inverter circuit (or DC / DC circuit, etc.) on the circuit board 120. Meanwhile, the first pin 1311 of the first pole is electrically connected to the positive connector of the photovoltaic connector 140, and the second pin 1312 of the second pole is electrically connected to the negative connector of the photovoltaic connector 140. Alternatively, the first pin 1311 of the first pole is electrically connected to one positive connector of the photovoltaic connector 140, and the second pin 1312 of the second pole is electrically connected to the other positive connector of the photovoltaic connector 140.

[0075] It should be understood that the rotary switch in the present application can be, for example, a bipolar switch, a tripolar switch, a quadrupole switch, etc., and the embodiments of the present application are not limited to this.

[0076] The switch body 131 may also include an insulating housing 1315. Multiple pins of the switch body 131 are located within a housing cavity enclosed by the insulating housing 1315. Multiple through-holes are provided on the sidewall of the insulating housing 1315 near the circuit board 120, through which the multiple pins can extend to the exterior of the insulating housing 1315. The ends of the multiple pins extending outside the insulating housing 1315 are connected to a side of the circuit board 120 near the switch body 131. It will be appreciated that the multiple pins of the switch body 131 include portions located within the housing cavity enclosed by the insulating housing 1315 and portions extending outside the insulating housing 1315. The portions of the multiple pins extending outside the insulating housing 1315 are located between the insulating housing 1315 and the circuit board 120.

[0077] It should be understood that the material of the insulating shell 1315 is an insulating material, such as plastic.

[0078] Continuing with Figures 3 and 4 , the switch body 131 may further include a metal connector and a rotating shaft 1316. The metal connector is located within the cavity enclosed by the insulating housing 1315 and between the two pins of the same polarity. The rotating shaft 1316 is connected to the metal connector so that it rotates with the rotation of the rotating shaft 1316, thereby achieving the current switching function of the rotary switch 130.

[0079] Illustratively, a first metal connector is provided between the first pin 1311 and the third pin 1313, and a second metal connector is provided between the second pin 1312 and the fourth pin 1314. By rotating the shaft 1316, the first and second metal connectors rotate accordingly, and the first pin 1311 and the third pin 1313 are electrically connected via the first metal connector, and the second pin 1312 and the fourth pin 1314 are electrically connected via the first metal connector; alternatively, the first pin 1311 and the third pin 1313 are disconnected, and the second pin 1312 and the fourth pin 1314 are disconnected.

[0080] In the embodiment of the present application, the metal connector and the rotating shaft 1316 can be an integral structure or a separate structure. The embodiment of the present application is not limited to this. When the metal connector and the rotating shaft 1316 are a separate structure, the metal connector and the rotating shaft 1316 are two different components, and the two can be assembled together by means of snap connection, snap fit, screws, bolts, etc., and the two can be separated when disassembly is required. When the metal connector and the rotating shaft 1316 are an integral structure, the connection relationship between the metal connector and the rotating shaft 1316 cannot be separated. For example, the metal connector and the rotating shaft 1316 can be processed and manufactured in an integral molding manner, and the metal connector can be a part of the rotating shaft 1316; for another example, the metal connector and the rotating shaft 1316 can be assembled by welding, riveting, etc.

[0081] The handle assembly 132 of the rotary switch 130 includes a rotary handle 1321 and a sleeve 1322. The rotary handle 1321 is located on the outside of the housing 110 of the photovoltaic inverter. A through hole is provided on the side wall of the housing 110 near the rotary handle 1321, and the sleeve 1322 extends through the through hole into the accommodating cavity (specifically the first chamber) surrounded by the housing 110, and is rotatably connected to the rotating shaft 1316. That is, the rotary handle 1321 is rotatably connected to the rotating shaft 1316 through the sleeve 1322 extending into the accommodating cavity (specifically the first chamber) surrounded by the housing 110. When the user manipulates the rotary handle 1321 to rotate, the sleeve 1322 can be driven to rotate, thereby driving the rotating shaft 1316 to rotate, thereby realizing the function of turning the rotary switch 130 on and off the current.

[0082] To ensure the stability of the photovoltaic inverter's electrical performance, adjacent pins must be spaced a certain distance apart. For example, first pin 1311 and second pin 1312 must be spaced a certain distance apart. However, at high currents or voltages, this can increase the thickness of the rotary switch, hindering the miniaturization and integration of the rotary switch and photovoltaic inverter.

[0083] In this embodiment of the present application, multiple grooves are provided on the outer wall of the insulating housing 1315 near the circuit board 120. The openings of the multiple grooves are located on the side of the insulating housing 1315 near the circuit board 120, and each groove is located between the pins of two adjacent electrodes. For example, the multiple grooves include a first groove 13151 and a second groove 13152. The first groove 13151 is located between the first pin 1311 and the second pin 1312, and the second groove 13152 is located between the third pin 1313 and the fourth pin 1314.

[0084] It should be noted that the first pin 1311 and the second pin 1312 are pins for the first pole of the rotary switch 130, and the third pin 1313 and the fourth pin 1314 are pins for the second pole of the rotary switch 130. The first pole and the second pole are adjacent poles. It is understood that the first pin 1311 and the second pin 1312 are two pins located on the same side of the adjacent poles.

[0085] It should be understood that the first pin 1311 and the second pin 1312 are adjacent pins, and the third pin 1313 and the fourth pin 1314 are adjacent pins. In other words, the first pin 1311 and the second pin 1312 are located on the same side, and the third pin 1313 and the fourth pin 1314 are located on the other side. In other words, the first pin 1311 and the second pin 1312 are electrically connected to the photovoltaic connector 140 via metal traces on the circuit board 120, and the third pin 1313 and the fourth pin 1314 are electrically connected to the inverter circuit (or DC / DC circuit) on the circuit board 120 via metal traces on the circuit board 120.

[0086] It should be understood that the number of grooves between the pins of two adjacent poles can be one or more. For example, more grooves can be set on the insulating shell 1315 between the first pin 1311 and the second pin 1312, and more grooves can be set on the insulating shell 1315 between the third pin 1313 and the fourth pin 1314. The embodiment of the present application does not limit the number of grooves between two adjacent pins.

[0087] It should be understood that the number of grooves between the first pin 1311 and the second pin 1312 may be the same as or different from the number of grooves between the third pin 1313 and the fourth pin 1314 .

[0088] Optionally, referring to FIG5 , the length of the groove along the X direction is greater than or equal to the width of the pin along the X direction.

[0089] In the embodiment of the present application, a groove is provided on the insulating housing between the pins of two adjacent poles, which can increase the creepage distance between the pins of two adjacent poles, thereby ensuring the electrical performance stability and safety of the photovoltaic inverter.

[0090] FIG6 is a schematic diagram of the structure of another rotary switch provided in an embodiment of the present application.

[0091] As shown in FIG6 , a plurality of bosses are provided on the outer side wall of the insulating housing 1315 close to the circuit board 120 . The plurality of bosses are located between the insulating housing 1315 and the circuit board 120 , and each boss is located between the pins of two adjacent poles.

[0092] It should be understood that the boss is a raised structure on the insulating housing 1315 , and the pins of two adjacent poles located between the insulating housing 1315 and the circuit board 120 can be separated by the boss.

[0093] Exemplarily, referring to FIG. 6 , the plurality of bosses may include a first boss 13153 and a second boss 13154 , wherein the first boss 13153 is located between the first pin 1311 and the second pin 1312 , and the second boss 13154 is located between the third pin 1313 and the fourth pin 1314 .

[0094] It should be understood that the number of bosses between the pins of two adjacent poles can be one or more. For example, more bosses can be set on the insulating shell 1315 between the first pin 1311 and the second pin 1312, and more bosses can be set on the insulating shell 1315 between the third pin 1313 and the fourth pin 1314. The embodiment of the present application does not limit the number of bosses between two adjacent pins.

[0095] It should be understood that the number of bosses between the first pin 1311 and the second pin 1312 may be the same as or different from the number of bosses between the third pin 1313 and the fourth pin 1314 .

[0096] It should be understood that the material of the boss is an insulating material, such as plastic. The material of the boss can be the same as or different from the material of the insulating housing 1315.

[0097] It should be understood that the boss and insulating housing 1315 can be an integral structure or a separate structure, and this is not limited in the embodiments of the present application. When the boss and insulating housing 1315 are separate structures, the boss and insulating housing 1315 are two different components that can be assembled together by snapping, snapping, screws, bolts, etc., and can be separated when disassembly is required. When the boss and insulating housing 1315 are an integral structure, the connection between the boss and insulating housing 1315 cannot be separated. For example, the boss and insulating housing 1315 can be manufactured using an integral molding method, and the boss can be part of the insulating housing 1315.

[0098] Optionally, referring to FIG. 6 , the height of the boss along the Z direction is greater than or equal to the height of the portion of the pin extending outside the insulating housing 1315 along the Z direction.

[0099] Optionally, referring to FIG6 , the width of the boss along the X direction is greater than or equal to the width of the pin along the X direction.

[0100] In the embodiment of the present application, the pins of the two adjacent poles located between the insulating housing 1315 and the circuit board 120 can be separated by the boss, which can increase the creepage distance between the pins of the two adjacent poles, thereby ensuring the electrical performance stability and safety of the photovoltaic inverter.

[0101] FIG7 is a schematic diagram of the structure of another switch body provided in an embodiment of the present application.

[0102] As shown in FIG7 , a plurality of ribs are provided on the outer wall of the insulating housing 1315 near the circuit board 120. The ribs protrude from a side of the insulating housing 1315 near the circuit board 120, and the ribs correspond one-to-one with the pins of the rotary switch 130. For example, the first rib 13155 corresponds to the first pin 1311, and the second rib 13156 corresponds to the second pin 1312.

[0103] For example, second rib 13156 may include a first portion, a second portion, and a third portion, wherein one end of the first portion is connected to the second portion, and the other end of the first portion is connected to the third portion, with the second portion and the third portion being disposed opposite each other. Furthermore, the first portion is located on a side of second pin 1312 that is closer to first pin 1311. The first portion, second portion, and third portion form second rib 13156.

[0104] It should be understood that the cross-section of the pin in the embodiment of the present application is rectangular, and the second surrounding rib 13156 surrounds three sides of the portion of the second pin 1312 extending outside the insulating housing 1315.

[0105] The first rib 13155 may also include a first portion, a second portion, and a third portion, with one end of the first portion connected to the second portion and the other end of the first portion connected to the third portion, with the second portion and the third portion being disposed opposite each other. The first portion may be located on a side of the first pin 1311 away from the second pin 1312.

[0106] In some embodiments, since there is no pin on the side of the first pin 1311 away from the second pin 1312 , the first portion of the first surrounding rib 13155 may also be located on the side of the first pin 1311 close to the second pin 1312 .

[0107] It should be understood that at least a portion of the first rib 13155 and / or the second rib 13156 is located between the first pin 1311 and the second pin 1312. The first pin 1311 is a first pole of the rotary switch 130, and the second pin 1312 is a second pole of the rotary switch 130. The first pole and the second pole are adjacent poles.

[0108] It should be understood that the first pin 1311 and the second pin 1312 are adjacent pins, and the third pin 1313 and the fourth pin 1314 are adjacent pins. In other words, the first pin 1311 and the second pin 1312 are located on the same side, and the third pin 1313 and the fourth pin 1314 are located on the other side. In other words, the first pin 1311 and the second pin 1312 are electrically connected to the photovoltaic connector 140 via metal traces on the circuit board 120, and the third pin 1313 and the fourth pin 1314 are electrically connected to the inverter circuit (or DC / DC circuit) on the circuit board 120 via metal traces on the circuit board 120.

[0109] It should be understood that the first surrounding rib and the second surrounding rib are two adjacent surrounding ribs located on the same side. The first surrounding rib and the second surrounding rib can be understood as two surrounding ribs corresponding to two pins of two adjacent poles.

[0110] In some embodiments, the first rib 13155 may further include a fourth portion, disposed opposite the first portion, with its ends connected to the second and third portions, respectively. The first portion may be located on the side of the first pin 1311 away from the second pin 1312, and the fourth portion may be located on the side of the first pin 1311 closer to the second pin 1312. Similarly, the second rib 13156 may also include a fourth portion, located on the side of the second pin 1312 away from the first pin 1311. In other words, the four portions of each rib are sequentially connected, with each rib surrounding the circumference of the portion of a pin extending outside the insulating housing 1315. For example, the first rib 13155 surrounds the circumference of the portion of the first pin 1311 extending outside the insulating housing 1315, and the second rib 13156 surrounds the circumference of the portion of the second pin 1312 extending outside the insulating housing 1315.

[0111] In some embodiments, the inner side of the rib and the portion of the pin located between the insulating housing 1315 and the circuit board 120 are bonded together.

[0112] It should be understood that the structures of other ribs can refer to the relevant descriptions of the first rib 13155 and the second rib 13156, and will not be repeated here.

[0113] In an embodiment of the present application, each pin is surrounded by a rib, and at least a portion of two adjacent ribs is located between two pins on the same side of adjacent poles, thereby increasing the creepage distance and electrical clearance between the two pins on the same side, thereby ensuring the stability and safety of the electrical performance of the photovoltaic inverter.

[0114] Figure 8 is a schematic diagram of the structure of a switch body provided in an embodiment of the present application. As shown in Figure 8 , a groove may be provided on the insulating housing 1315 between the first rib 13155 and the second rib 13156 to increase the creepage distance between the first pin 1311 and the second pin 1312. The structure of the groove can be referred to the description of the embodiment shown in Figure 5 and will not be repeated here.

[0115] It should be understood that the first rib 13155 is the rib corresponding to the first pin 1311, and the second rib is the rib corresponding to the first pin 1311. The first pin 1311 belongs to the first pole of the rotary switch 130, and the second pin 1312 belongs to the second pole of the rotary switch 130. The first pole and the second pole are adjacent poles. It can be understood that the first pin 1311 and the second pin 1312 are two pins located on the same side of the adjacent poles.

[0116] It should be understood that the number of grooves between the first surrounding rib 13155 and the second surrounding rib 13156 can be one or more, and this embodiment of the present application is not limited to this.

[0117] In some embodiments, a boss (not shown) may be provided between the first rib 13155 and the second rib 13156 to increase the creepage distance and electrical clearance between the first pin 1311 and the second pin 1312. The structure of the boss can be referred to the description of the embodiment shown in FIG6 and will not be repeated here.

[0118] The number of grooves between the first surrounding rib 13155 and the second surrounding rib 13156 can be one or more, which is not limited in this embodiment of the present application.

[0119] It should be understood that the number of bosses between the first surrounding rib 13155 and the second surrounding rib 13156 can be one or more, and this embodiment of the present application is not limited to this.

Claims

1. A photovoltaic inverter, characterized in that: include: A rotary switch (130), the rotary switch (130) comprising a switch body (131), the switch body (131) comprising an insulating housing (1315) and a plurality of pins, the switch body (131) comprising a plurality of pins, the plurality of pins extending out of the insulating housing (1315); The rotary switch (130) is a multi-pole switch, each pole of the rotary switch (130) includes two pins, a groove is provided on the insulating housing (1315) between two pins located on the same side of two adjacent poles, the opening of the groove is located on the side of the insulating housing (1315) where the plurality of pins are located, or a boss is formed on the outer side wall of the insulating housing (1315), the boss is located between two pins located on the same side of the two adjacent poles.

2. The photovoltaic inverter according to claim 1, characterized in that: The photovoltaic inverter also includes a circuit board (120), the portion of the plurality of pins extending outside the insulating housing (1315) is located between the insulating housing (1315) and the circuit board (120), and one end of the plurality of pins extending outside the insulating housing (1315) is connected to a side of the circuit board (120) close to the insulating housing (1315).

3. The photovoltaic inverter according to claim 2, characterized in that: The photovoltaic inverter further comprises a housing (110); the circuit board (120) is located in a receiving cavity surrounded by the housing (110); the circuit board (120) divides the receiving cavity surrounded by the housing (110) into a first cavity and a second cavity; the first cavity is a receiving space surrounded by the circuit board (120), a bottom plate of the housing (110) and a side plate of the housing (110); the second cavity is a receiving space surrounded by the circuit board (120), a top plate of the housing (110) and a side plate of the housing (110); the distance between the circuit board (120) and the bottom plate is greater than the distance between the circuit board (120) and the top plate; the height of the electrical component connected to a side of the circuit board close to the bottom plate is greater than or equal to a first preset value; the height of the electrical component connected to a side of the circuit board close to the top plate is less than or equal to a second preset value; the first preset value is greater than the second preset value; and the switch body (131) is located in the first cavity.

4. The photovoltaic inverter according to claim 2 or 3, characterized in that: The insulating shell (1315) is provided with a plurality of through holes on a side wall close to the circuit board (120), the plurality of pins corresponding to the plurality of through holes one by one, and the plurality of pins pass through the plurality of through holes and extend out of the insulating shell (1315).

5. The photovoltaic inverter according to claim 2 or 3, characterized in that: The plurality of pins are connected to the circuit board (120) by welding.

6. The photovoltaic inverter according to claim 2 or 3, characterized in that: The number of the grooves between the two pins located on the same side of the two adjacent poles is one or more, or the number of the bosses between the two pins located on the same side of the two adjacent poles is one or more.

7. A photovoltaic inverter, characterized in that: include: A rotary switch (130), the rotary switch (130) comprising a switch body (131), the switch body (131) comprising an insulating shell (1315) and a plurality of pins, the plurality of pins extending out of the insulating shell (1315); The insulating shell (1315) further comprises a plurality of ribs, the plurality of ribs protruding from the outer side wall of the insulating shell (1315), and the plurality of ribs and the plurality of pins corresponding one to one; The rotary switch (130) is a multi-pole switch. Each pole of the rotary switch (130) comprises two pins. At least part of the plurality of ribs is located between two pins located on the same side of two adjacent poles.

8. The photovoltaic inverter according to claim 7, characterized in that: The photovoltaic inverter also includes a circuit board (120), the portion of the plurality of pins extending outside the insulating housing (1315) is located between the insulating housing (1315) and the circuit board (120), and the plurality of pins are connected to a side of the circuit board (120) close to the insulating housing (1315).

9. The photovoltaic inverter according to claim 8, characterized in that: Each of the plurality of ribs surrounds the periphery of a portion of a pin located between the insulating housing (1315) and the circuit board (120).

10. The photovoltaic inverter according to claim 8 or 9, characterized in that: A groove is provided on the insulating shell (1315) between two adjacent ribs, the opening of the groove is located on one side of the insulating shell (1315) where the plurality of pins are located, and the two adjacent ribs are two ribs corresponding to the two pins located on the same side of the two adjacent poles.

11. The photovoltaic inverter according to claim 8 or 9, characterized in that: The insulating shell (1315) further comprises a boss, wherein the boss is located on a side of the insulating shell (1315) close to the circuit board (120), and the boss is located between two adjacent ribs, wherein the two adjacent ribs are two ribs corresponding to two pins located on the same side of the two adjacent poles.

12. A rotary switch, characterized in that: include: A switch body (131), the switch body (131) comprising an insulating shell (1315) and a plurality of pins, the plurality of pins being located in a receiving cavity surrounded by the insulating shell (1315), and the plurality of pins extending out of the insulating shell (1315), and the plurality of pins extending out of one end of the insulating shell (1315) being used for connection with a circuit board (120) of a photovoltaic inverter; The rotary switch (130) is a multi-pole switch, each pole of the rotary switch (130) includes two pins, a groove is provided on the insulating housing (1315) between two pins located on the same side of two adjacent poles, the opening of the groove is located on the side of the insulating housing (1315) where the plurality of pins are located, or the insulating housing (1315) includes a boss, the boss is located on a side of the insulating housing (1315) close to the circuit board (120), and the boss is located between the two pins located on the same side of the two adjacent poles.

13. The rotary switch according to claim 12, characterized in that: The photovoltaic inverter further comprises a housing (110); the circuit board (120) is located in a receiving cavity surrounded by the housing (110); the circuit board (120) divides the receiving cavity surrounded by the housing (110) into a first cavity and a second cavity; the first cavity is a receiving space surrounded by the circuit board (120), a bottom plate of the housing (110) and a side plate of the housing (110); the second cavity is a receiving space surrounded by the circuit board (120), a top plate of the housing (110) and a side plate of the housing (110); the distance between the circuit board (120) and the bottom plate is greater than the distance between the circuit board (120) and the top plate; the height of the electrical component connected to a side of the circuit board close to the bottom plate is greater than or equal to a first preset value; the height of the electrical component connected to a side of the circuit board close to the top plate is less than or equal to a second preset value; the first preset value is greater than the second preset value; and the switch body (131) is located in the first cavity.

14. A rotary switch, characterized in that: include: A switch body (131), the switch body (131) comprising an insulating shell (1315) and a plurality of pins, the plurality of pins being located in a receiving cavity surrounded by the insulating shell (1315), and the plurality of pins extending out of the insulating shell (1315), and one end of the plurality of pins extending out of the insulating shell (1315) being used for connecting to a circuit board (120) of a photovoltaic inverter; The insulating housing (1315) further comprises a plurality of ribs, the plurality of ribs protruding from a side wall of the insulating housing (1315) close to the circuit board (120), the plurality of ribs corresponding to the plurality of pins one by one; The rotary switch (130) is a multi-pole switch. Each pole of the rotary switch (130) comprises two pins. At least part of the plurality of ribs is located between two pins located on the same side of two adjacent poles.

15. The rotary switch according to claim 14, characterized in that: A groove is provided on the insulating shell (1315) between two adjacent ribs, the opening of the groove is located on one side of the insulating shell (1315) where the plurality of pins are located, and the two adjacent ribs are two ribs corresponding to the two pins located on the same side of the two adjacent poles.

16. The rotary switch according to claim 14, characterized in that: The insulating shell (1315) further comprises a boss, wherein the boss is located on a side of the insulating shell (1315) close to the circuit board (120), and the boss is located between two adjacent ribs, wherein the two adjacent ribs are two ribs corresponding to two pins located on the same side of the two adjacent poles.

17. The rotary switch according to claim 15, characterized in that: The insulating shell (1315) further comprises a boss, wherein the boss is located on a side of the insulating shell (1315) close to the circuit board (120), and the boss is located between two adjacent ribs.

Images