CN113452320A - Wiring device of power electronic equipment and photovoltaic inverter - Google Patents

Abstract

The invention discloses a wiring device for power electronic equipment, comprising a wiring piece for connecting with an external wire, the wiring device further comprising a wiring seat for movably connecting to a casing of the power electronic device, and the wiring piece is arranged on the wiring seat On the other hand, the terminal block has a non-wire position inside the housing of the power electronic device and a wiring position outside the casing, and the wiring device further includes a drive mechanism for driving the terminal block to move between the non-wire position and the wire position. The wiring device can complete wiring without using a junction box, is fast and reliable, and is relatively beautiful.

Description

A wiring device for power electronic equipment and photovoltaic inverter

technical field

The invention belongs to the field of power electronic equipment wiring, and relates to a wiring device for power electronic equipment and a photovoltaic inverter with the wiring device.

Background technique

The power supply and power conversion equipment of inverters, frequency converters, uninterruptible power supplies and other equipment generally need to be wired with the input or output terminals. A common practice is to use a junction box and lock the junction box outside after wiring. But this will bring some problems. On the one hand, the junction box will be exposed after the wires are connected, which will lengthen the overall size of the machine and increase the installation space requirements; on the other hand, the exposed junction box will break the original design and destroy the appearance ratio. It does not conform to the trend of beautiful appearance of equipment.

Chinese patent CN212182584U discloses a three-layer wiring terminal for photovoltaic inverter, which includes a plastic casing, a conductive plate, a locking plate and a rotating block. The interior of the plastic casing is provided with a fixing plate, and the surface of the fixing plate is mounted with terminals. The top of the connection terminal and the surface of the plastic casing are in the same plane, the surface of the plastic casing is provided with a connection hole, and the connection hole communicates with the interior of the connection terminal. In this patent, by pressing the handle, the handle transmits the force to the spring through the limit rod, the rotating block, the connecting column and the locking plate, so that the spring is deformed, and the limit rod is engaged with the first limit plate by the elastic force generated by the spring deformation. In the groove between the second limiting plate and the second limit plate, the steps are cumbersome and labor-saving; at the same time, the structure of the three-layer terminal is too large and takes up additional installation space.

SUMMARY OF THE INVENTION

In view of the above problems, an object of the present invention is to provide a wiring device for power electronic equipment, which can meet the requirements of convenient wiring without additionally setting an exposed junction box, the power electronic equipment does not occupy additional installation space, and is more beautiful .

Another object of the present invention is to provide a photovoltaic inverter, which can meet the requirements of convenient wiring, does not need to additionally provide an exposed junction box, does not occupy additional installation space, and is more beautiful.

In order to achieve the above object, the present invention provides a wiring device of a power electronic device, comprising a wiring member for connecting with an external wire, the wiring device further comprising a wiring seat for movably connecting to a housing of the power electronic device, The wiring member is arranged on the wiring seat, and the wiring seat has a non-wiring position inside the housing of the power electronic device and a wiring position outside the housing, and the wiring device further includes a A driving mechanism for driving the wire base to move between the non-wire position and the wire position.

Preferably, the drive mechanism includes a link mechanism connected to the housing, the link mechanism includes a base, a link and a link arm, and one end of the link is rotatably connected to the base, The other end of the connecting rod is rotatably connected to the connecting rod arm, and the wiring seat is arranged on the connecting rod arm.

Preferably, the wiring device further includes a guide mechanism, the guide mechanism includes a guide rod and a guide plate for connecting to the housing, the guide plate is provided with a guide groove, and the first end of the guide rod The second end of the guide rod is slidably inserted into the guide groove.

Preferably, the guide groove is in an arc shape, the center of the arc shape falls on the rotation axis of the connecting rod, and the guide groove has a head end and a tail end; the guide plate is also provided with a first limiting slot communicated with the tail end of the guide slot, the first limiting slot extends outward from the tail end of the guide slot; when the wiring seat is in the non-connecting During the switching process between the position and the wiring position, the second end of the guide rod is slidably located in the guide groove; when the wiring seat is in the wiring position, the second end of the guide rod The end is located in the first limiting groove.

Preferably, the first limiting groove has a limiting wall portion facing away from the rear end portion, a distal end wall facing the trailing end portion, and a container located between the limiting arm portion and the distal end wall A slot portion, when the wiring seat is at the wiring position, the second end of the guide rod is located in the accommodating slot portion; the upper or side of the limiting arm portion is formed with a guide for the guide space for the rod to pass through.

Preferably, the guide plate is further provided with a second limiting groove communicating with the head end of the guide groove, and the second limiting groove extends outward from the head end of the guide groove ; When the wiring seat is in the non-connecting position, the second end of the guide rod is located in the second limiting groove.

Preferably, the wiring device further comprises a locking mechanism for locking the wiring base in a non-wired position, the locking mechanism being connected and arranged between the base and the connecting rod or between the connecting rod and the connecting rod between the lever arms.

Preferably, the locking mechanism includes at least a pair of clamps disposed on the base, and when the locking mechanism is in an unlocked state, the wiring seat is in the non-wired state, and the connecting rod is locked into the between the clamping pieces; when the locking mechanism is in an unlocked state, the connecting rod is disengaged from the clamping pieces.

Preferably, each of the clamping members has a connecting end connected to the base and a clamping end farther away from the base, and there is a connecting end between the clamping ends of the hijacking member for the connecting rod to be clamped. into the gap, the clamping member has elasticity to allow the connecting rod to be engaged or disengaged from the gap.

Preferably, the locking mechanism further includes a plurality of guide members, each of the clamping members is respectively fixedly connected with or integrally formed with one of the guide members, and the guide member has the function of enabling the connecting rod to be inserted into the gap. Guided guide ramp.

The present invention also provides a photovoltaic inverter, comprising a housing, characterized in that, the photovoltaic inverter further comprises the above-mentioned wiring device, the wiring device is arranged in the housing, and the housing is provided with The wiring seat enters and exits the through hole of the housing.

The present invention adopts the above scheme, has the following advantages compared with the prior art:

In the wiring device for power electronic equipment of the present invention, the wiring element is arranged on the wiring seat, and the wiring seat can be moved out of the casing of the power electronic equipment, so as to facilitate the connection of external wires (such as power and/or signal input wires or output wires) ) is connected to the wiring piece, and after the wiring is completed, the wiring seat is returned to the housing. While ensuring convenient and fast wiring, there is no need to additionally set up a junction box exposed outside the housing, thus avoiding the extra occupation of the junction box for installation. Space, power and electronic equipment can maintain the original design shape, more beautiful. The photovoltaic inverter of the present invention adopts the above-mentioned wiring device, which ensures convenient and fast wiring, and does not need to additionally set up a junction box exposed outside the casing, thus avoiding the junction box taking up additional installation space and maintaining the original design. The shape is more beautiful.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are of great significance to the art For those of ordinary skill, other drawings can also be obtained from these drawings without any creative effort.

1a and 1b are partial perspective views of a photovoltaic inverter according to an embodiment of the present invention;

2 is a schematic front view of the structure of a wiring device of a power electronic device according to an embodiment of the present invention;

3 is a schematic diagram of a rear view of a wiring device of a power electronic device according to an embodiment of the present invention;

4 is a schematic front view of a link mechanism according to an embodiment of the present invention;

5 is a schematic diagram of a rear view of a link mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic front view of the structure of a guide plate according to an embodiment of the present invention;

7 is a schematic diagram of a rear view of a guide plate according to an embodiment of the present invention;

8 is a schematic structural diagram of a locking mechanism according to an embodiment of the present invention;

9 is a schematic structural diagram of a guide rod according to an embodiment of the present invention;

10 is a schematic structural diagram of a wiring member according to an embodiment of the present invention;

11 is a schematic front view of the structure of a wiring device of a power electronic device according to an embodiment of the present invention, wherein the wiring seat is in a non-wired state;

12 is a schematic diagram of a rear view of a wiring device of a power electronic device according to an embodiment of the present invention, wherein the wiring seat is in a non-wired state;

13 is a schematic front view of the structure of a wiring device of a power electronic device according to an embodiment of the present invention, wherein the wiring seat is in a wiring state;

14 is a schematic diagram of a rear view of a wiring device of a power electronic device according to an embodiment of the present invention, wherein the wiring socket is in a wiring state.

in,

1. Terminal block; 11. Crimping screw; 2. Shell; 3. Linkage mechanism; 31. Base; 32. Linkage; 33. Linkage arm; 34. Hinge; 35. Guide hole; 4. Guide plate; 41, guide groove; 411, tail end; 412, head end; 413, first limit groove; 4131, limit wall; 4132, end wall; 4133, accommodating groove; 414, second limit Position slot; 5, guide rod; 51, first end; 52, second end; 53, rod cap; 6, locking mechanism; 61, clamping piece; 62, straight plate; 63, guide piece; 631, connection 632, clamping end; 633, clearance; 634, guiding slope; 64, fixing plate; 7, connecting hole; 8, fastening hole; 9, through hole.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted here that the descriptions of these embodiments are used to help the understanding of the present invention, but do not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as there is no conflict with each other.

This embodiment provides a wiring device for power electronic equipment, specifically a wiring device for a photovoltaic inverter. In other embodiments, the power electronic device is a frequency converter or an uninterruptible power supply. This embodiment also provides a photovoltaic inverter with such a wiring device.

Referring to FIG. 1 _a and FIG. 1 b , the photovoltaic inverter includes a housing 2 and a wiring device, the wiring device is arranged in the housing 2 , and a through hole 9 is formed on the housing 2 .

Referring to FIGS. 2 to 14 , the wiring device includes a wiring member for connecting with an external wire, the external wire being a transmission line for inputting power or signals to the inverter, or for outputting power or The transmission line through which the signal is transmitted. The wiring device also includes a wiring seat for movably connecting to the housing 2 of the power electronic equipment, the wiring member is arranged on the wiring seat, and the wiring seat has a non-wiring position located in the housing 2 of the photovoltaic inverter and a non-wiring position located in the housing 2 other wiring locations. Specifically in this embodiment, the wiring seat includes a terminal block 1 , and the wiring member includes a crimping screw provided on the terminal block 1 . The terminal block 1 is an electronic component used for circuit connection. It is often used for electrical connection between the inside and outside of the housing 2 or between the board and the board. There are two fastening holes 8 and a plurality of crimping screws for wiring. 11, as shown in Figure 10.

The wiring device further includes a drive mechanism for driving the terminal block 1 to move between the non-wiring position and the wiring position. The driving mechanism includes a link mechanism 3 connected to the casing 2 , as shown in FIGS. 2 , 3 and 4 , the link mechanism 3 includes a base 31 , a link 32 and a link arm 33 . One end of the connecting rod 32 is rotatably connected to the base 31 , the other end of the connecting rod 32 is rotatably connected to the connecting rod arm 33 , and the terminal block 1 is arranged on the connecting rod arm 33 . The connecting rod 32 and the connecting rod arm 33 and the connecting rod 32 and the base 31 are connected by a pivot shaft 34 and can rotate relatively. The link arm 33 is bent to have two connected ends, one end is provided with two fastening holes for fixing the terminal block 1 on the link arm 33 , and the other end is provided with a guide hole 35 .

The wiring device also includes a guide mechanism, as shown in FIGS. 5 to 7 and 9 , the guide mechanism includes a guide rod 5 and a guide plate 4 for connecting to the housing 2 , and the guide plate 4 is provided with a guide plate 4 . In the groove 41 , the first end of the guide rod 5 is inserted into the guide hole 35 and connected to the link arm 33 , and the second end 52 of the guide rod 5 is connected to a rod cap 53 and is slidably inserted into the guide groove 41 Inside. The guide groove 41 is arc-shaped and the center of the arc falls on the rotation axis line of the connecting rod 32 (ie, the axis line of the pivot shaft 34 connected between the connecting rod and the base), and the guide groove 41 has a first End 412 and trailing end 411 . The guide plate 4 is also provided with a first limiting slot 413 that communicates with the tail end 411 of the guide slot 41. The first limiting slot 413 extends outward from the tail end 411 of the guide slot 41; During the switching between the non-connection position and the connection position, the second end 52 of the guide rod 5 is slidably located in the guide groove 41; when the terminal block 1 is in the connection position, the second end 52 of the guide rod 5 is located in the first position. in a limiting groove 413 . The first limiting groove 413 has a limiting wall portion 4131 facing away from the tail end portion 411 , a terminal wall portion 4132 facing the tail end portion 411 , and an accommodating groove portion 4133 located between the limiting wall portion 4131 and the end wall portion. When the terminal block 1 is in the wiring position, the second end 52 of the guide rod 5 is located in the accommodating groove 4133, and the guide rod 5 cannot move when it is located in the accommodating groove; the upper or side of the limiting wall 4131 is formed There is space for the guide rod 5 to pass through. Wherein, the limiting wall portion 4131 is inclined, as shown in FIG. 6 , it extends obliquely from bottom to top in a manner of gradually moving away from the rear end portion 411 of the guide groove 41 , and the upper portion of the limiting arm portion 4131 is provided with a guide rod for entering and exiting. space. After the guide rod enters the accommodating groove portion 4133 , due to the blocking of the limiting arm portion 4131 , the terminal block will remain in its wiring position to avoid accidental retraction of the housing. Only after the wiring is completed, the terminal block 1 is slightly lifted upward, and the guide rod passes over the limiting arm portion 4131 and passes through the space above it, so that the first limiting groove 413 can be slid out. The guide plate 4 is also provided with a second limiting slot 414 that communicates with the head end 412 of the guide slot 41. The second limiting slot 414 extends outward from the head end 412 of the guide slot 41; In the non-connecting position, the second end 52 of the guide rod 5 is located in the second limiting groove 414 . The guide plate 4 is bent to have two connected ends, the guide groove 41 is provided on one end and the other end is provided with a connecting hole 7 .

As shown in FIG. 8 , the wiring device further includes a locking mechanism 6 . The locking mechanism 6 includes at least a pair of clamping members 61 arranged on the base 31. When the locking mechanism 6 is in an unlocked state, the wiring seat is in a non-wired state, and the connecting rod 32 is clamped between the clamping members 61; In the unlocked state, the connecting rod 32 is disengaged from the clamping member 61 . Each of the clamping members 61 has a connecting end 631 connected to the base 31 and a clamping end 632 farther away from the base 31 . In the gap 633 into which the connecting rod 32 is inserted, the clamping member 61 has elasticity to allow the connecting rod 32 to be inserted into or disengaged from the gap 633 , and the width of the gap 633 is smaller than the cross-sectional diameter of the connecting rod 32 . The locking mechanism 6 also includes a plurality of guide pieces 63 , each of the clamping pieces 61 is fixedly connected with or integrally formed with one of the guide pieces 63 , and the guide pieces 63 have a guide for guiding the connecting rod 32 to be inserted into the gap 633 . Guide ramp 634 .

Specifically, in this embodiment, the locking mechanism 6 includes a pair of clamping members 61 and a straight plate 62, one short end of the straight plate 62 is connected to a short end of a clamping member 61, and the other short end is connected to another clamping member When the transmission rod slides to the first limit groove 413, the connecting rod 32 is clamped in the gap 633 between the elastic pieces; when the guide rod 5 slides to the second limit groove 414, the connecting rod 32 escapes from the gap 633 between the guide members 63 . The other short ends of the clamping members 61 are respectively connected with a guide member 63 , and the connecting rod 32 can be detachably clamped between the guide members 63 . There is a gap 633 between the guide members 63 , and the width of the gap 633 is smaller than the cross-sectional diameter of the connecting rod 32 . The guide member 63 also has a guide slope 634, each guide member 63 corresponds to a guide slope 634, the long side of the guide slope 634 is connected with the width of the clamping member 61, and the slope shape is a long and narrow rectangle. The two guide slopes 634 are arranged opposite to each other and at an angle to each other, forming a structure with a wide upper part and a narrow lower part, so as to guide the connecting rod 32 to enter the gap 633 from the top and continue to move downward, and then clamped and fixed between the guide slopes 634; The slopes 634 move upward, and then escape from the gap 633 . The guide member 63 is made of elastic metal material to ensure that the elasticity can be maintained for a long time. At the same time, the clamping member 61 connects and supports the guide member 63, and can also play a part in the failure of the guide member 63. The long side of the straight plate 62 is also connected with a fixing plate 64 . The fixing plate 64 is provided with a connecting hole 7 , and the fixing plate 64 is connected to the link mechanism 3 through the connecting hole 7 .

The wiring device also includes fasteners for interconnecting and fixing different components, and the fasteners can be connecting parts such as screws. The fasteners can pass through the fastening holes 8 provided on both the terminal block 1 and the link arm 33 , so as to fix the terminal block 1 on the link arm 33 .

The assembly process of this wiring device is as follows:

A. Assembling the link mechanism 3 : assemble the link arm 33 on the base 31 , and then assemble the link arm 33 to the link arm 33 .

B. Assemble the guide plate 4 : fix the guide plate 4 on the casing 2 .

C. Fixing the link mechanism 3 : Fix the base 31 of the link mechanism 3 on the housing 2 , and ensure that the link arm 33 is parallel to the guide plate 4 .

D. Assembling the guide rod 5: Pass the first end 51 of the transmission rod 51 through the through hole 9 on the folding plate 4 and fix it with the rod cap 53; the second end 52 passes through the guide hole 35 on the link arm 33 , and cooperate with the pin to limit the position.

E. Fixing the locking mechanism 6 : the locking mechanism 6 is fixed on the base 31 .

F. Assembling the terminal block 1: The terminal block 1 is fixed on the link arm 33 through the connecting hole 7 on the terminal block 1 through the fastener.

Based on the above-mentioned wiring device, a wiring method includes the following steps:

When the connection is not connected or the movement of the terminal block 1 is prevented, the transmission member 5 is slid to the first limit groove 413, and the connecting rod 32 is clamped in the gap 633 between the guide members 63, and the guide member 63 is deformed after being stressed. Fix the connecting rod 32, and the terminal block 1 is in the first state, as shown in FIG. 11 to FIG. 12;

During wiring, the guide rod 5 is slid to the second limit groove 414. At this time, the connecting rod 32 is separated from the guide member 63, the terminal block 1 protrudes from the housing 2, and the crimping screw 11 on the terminal block 1 is exposed. The electrician can During the wiring operation, since the guide rod 5 can be fixed in the second limiting groove 414, the link mechanism 3 together with the terminal block 1 will not shake, as shown in Figures 13 to 14;

After the wiring is completed, lift the terminal block 1 upwards slightly, so that the transmission member 5 is separated from the second limit groove 414 and slides to the first limit groove 413, the connecting rod 32 is clamped between the guide members 63 again, and the guide member 63 is stressed After tightening, the terminal block 1 returns to the first state, and the cover plate is placed on the terminal block 1 .

A wiring device for power electronic equipment and a photovoltaic inverter in this embodiment, the terminal block is fixed on the link mechanism, the link mechanism is connected with a guide rod, and the guide rod drives the link mechanism through the guide plate. The terminal block moves according to the preset trajectory. The terminal block has a wiring position and a non-wiring position. In the wiring position, the terminal block can be located outside the shell to complete the wiring work; in the non-wiring position, the terminal block can be located in the shell, and the wiring can be completed without using a junction box. . The guide plate can use a flat plate of common material, which can make the wiring work fast and reliable, and can make the appearance of the product more beautiful, reduce the overall size of the product, reduce the installation space requirements, and improve the competitiveness of the product.

The above-mentioned embodiment is only to illustrate the technical concept and characteristics of the present invention, and is a preferred embodiment, and its purpose is that those who are familiar with the technology can understand the content of the present invention and implement it accordingly, and cannot limit the present invention by this. protected range. All equivalent transformations or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. A wiring device of a power electronic device, comprising a wiring member for connecting with an external wire, characterized in that the wiring device further comprises a wiring seat for being movably connected to a housing of the power electronic device, the The wiring piece is arranged on the wiring seat, and the wiring seat has a non-wiring position inside the housing of the power electronic device and a wiring position outside the housing, and the wiring device further includes a drive for driving A drive mechanism for the wire base to move between the non-wire position and the wire position. 2 . The wiring device according to claim 1 , wherein the drive mechanism comprises a link mechanism connected to the housing, the link mechanism comprises a base, a link and a link arm, and the link One end of the rod is rotatably connected to the base, the other end of the connecting rod is rotatably connected to the link arm, and the wiring seat is arranged on the link arm. 3 . The wiring device according to claim 2 , wherein the wiring device further comprises a guide mechanism, the guide mechanism comprises a guide rod and a guide plate for connecting to the housing, the guide plate A guide groove is provided, the first end of the guide rod is connected to the link arm or the wiring seat, and the second end of the guide rod is slidably inserted into the guide groove. 4 . The wiring device according to claim 3 , wherein the guide groove is in the shape of an arc and the center of the arc falls on the rotation axis line of the connecting rod, and the guide groove has a head end portion. 5 . and the tail end; the guide plate is also provided with a first limiting groove communicated with the tail end of the guide groove, and the first limiting groove extends from the tail end of the guide groove to the extending outward; when the wiring seat is in the process of switching between the non-wiring position and the wiring position, the second end of the guide rod is slidably located in the guide groove; when the wiring seat is in the In the wiring position, the second end of the guide rod is located in the first limiting groove. 5 . The wiring device according to claim 4 , wherein the first limiting groove has a limiting wall portion facing away from the tail end portion, a distal end wall portion facing the tail end portion, and a limit wall portion located at the end portion. 6 . The accommodating groove portion between the limiting arm portion and the end wall, when the wiring seat is in the wiring position, the second end portion of the guide rod is located in the accommodating groove portion; the limiting A space for the guide rod to pass through is formed above or on the side of the position arm; and/or, the guide plate is further provided with a second limit groove communicated with the head end of the guide groove, so The second limit groove extends outward from the head end of the guide groove; when the wiring seat is in the non-wire position, the second end of the guide rod is located at the second limit position in the slot. 6 . The wiring device according to claim 2 , wherein the wiring device further comprises a locking mechanism for locking the wiring base in a non-wired position, the locking mechanism being connected to the base and the connection. 7 . between the links or between the link and the link arm. 7 . The wiring device according to claim 6 , wherein the locking mechanism comprises at least a pair of clamping members disposed on the base, and when the locking mechanism is in an unlocked state, the wiring seat is in the unlocked state. 8 . In the non-wired state, the connecting rod is clamped between the clamping members; when the locking mechanism is in an unlocking state, the connecting rod is disengaged from the clamping members. 8 . The wiring device according to claim 7 , wherein each of the clamping members has a connecting end connected to the base and a clamping end farther away from the base, and each of the clamping members has a connecting end connected to the base and a clamping end farther away from the base. There is a gap for the connecting rod to be inserted between the clamping ends, and the clamping piece has elasticity to allow the connecting rod to be inserted or disengaged from the gap. 9 . The wiring device according to claim 7 , wherein the locking mechanism further comprises a plurality of guide pieces, each of the clamping pieces is respectively fixedly connected with or integrally formed with one of the guide pieces, and the said 9 . The guide has a guide slope for guiding the insertion of the link into the gap. 10. A photovoltaic inverter, comprising a casing, characterized in that the photovoltaic inverter further comprises the wiring device according to any one of claims 1 to 9, wherein the wiring device is arranged in the casing, The housing is provided with a through hole for the wiring socket to enter and exit the housing.

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