CN113452320B

CN113452320B - Wiring device of power electronic equipment and photovoltaic inverter

Info

Publication number: CN113452320B
Application number: CN202110557540.XA
Authority: CN
Inventors: 冯嘉; 宋云辉; 卢盈; 吴生闻
Original assignee: Elsevier Technology Co ltd; Esway New Energy Technology Jiangsu Co ltd
Current assignee: Elsevier Technology Co ltd; Esway New Energy Technology Jiangsu Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2025-09-16
Anticipated expiration: 2041-05-21
Also published as: CN113452320A

Abstract

The invention discloses a wiring device of power electronic equipment, which comprises a wiring piece used for being connected with an external wire, and also comprises a wiring seat used for being movably connected to a shell of the power electronic equipment, wherein the wiring piece is arranged on the wiring seat, the wiring seat is provided with a non-wiring position positioned in the shell of the power electronic equipment and a wiring position positioned outside the shell, and the wiring device also comprises a driving mechanism used for driving the wiring seat to move between the non-wiring position and the wiring position. The wiring device can finish wiring without using a junction box, is quick and reliable, and is attractive.

Description

Wiring device of power electronic equipment and photovoltaic inverter

Technical Field

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

Background

Power sources and power conversion devices of inverters, frequency converters, uninterruptible power supplies and the like generally need to be connected with input or output ends, and for good operation during connection, the connection points often protrude from the housing. It is common practice to use a junction box and lock the junction box outside after wiring. However, the exposed junction box breaks the original modeling design, damages the appearance proportion and does not accord with the tendency of the appearance of equipment to be attractive.

Chinese patent CN212182584U discloses a three-layer binding post for photovoltaic inverter, including plastic housing, current-conducting plate, locking plate and rotatory piece, plastic housing's inside is provided with the fixed plate, the surface mounting of fixed plate has binding post, binding post's top and plastic housing's surface are in the coplanar, the wiring hole has been seted up on plastic housing's surface, the wiring hole communicates in binding post's inside. According to the novel three-layer connecting terminal, the handle is pressed, force is transmitted to the spring through the limiting rod, the rotating block, the connecting column and the locking plate, the spring is deformed, the limiting rod is clamped in the groove between the first limiting plate and the second limiting plate through elastic force generated by deformation of the spring, the steps are complex, labor is not saved, and meanwhile the three-layer connecting terminal is overlarge in structure size and occupies extra installation space.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a wiring device for a power electronic device, which is capable of satisfying the condition of convenient wiring without providing an exposed junction box, and which does not occupy an installation space and is more attractive.

The invention further aims to provide the photovoltaic inverter, which can meet the condition of convenient wiring, does not need to additionally arrange an exposed junction box, does not additionally occupy the installation space, and is attractive.

In order to achieve the above object, the present invention provides a wiring device for a power electronic apparatus, comprising a wiring member for connecting with an external wire, the wiring device further comprising a wiring holder for movably connecting to a housing of the power electronic apparatus, the wiring member being disposed on the wiring holder, the wiring holder having a non-wiring position within the housing of the power electronic apparatus and a wiring position outside the housing, the wiring device further comprising a driving mechanism for driving the wiring holder to move between the non-wiring position and the wiring position.

Preferably, the driving mechanism comprises a link mechanism connected to the housing, the link mechanism comprises a base, a link and a link arm, one end of the link is rotatably connected to the base, the other end of the link is rotatably connected to the link arm, and the wire holder is arranged on the link arm.

Preferably, the wiring device further comprises a guiding mechanism, the guiding mechanism comprises a guiding rod and a guiding plate used for being connected to the shell, a guiding groove is formed in the guiding plate, a first end of the guiding rod is connected to the connecting rod arm or the wiring seat, and a second end of the guiding rod is slidably inserted into the guiding groove.

Preferably, the guide groove is arc-shaped, the circle center of the arc-shaped circle falls on the rotation axis of the connecting rod, the guide groove is provided with a head end part and a tail end part, the guide plate is further provided with a first limit groove communicated with the tail end part of the guide groove, the first limit groove extends outwards from the tail end part of the guide groove, the second end part of the guide rod is slidably positioned in the guide groove when the wire holder is in the non-wire connection position and the wire connection position in the switching process, and the second end part of the guide rod is positioned in the first limit groove when the wire holder is in the wire connection position.

Preferably, the first limiting groove is provided with a limiting wall part facing away from the tail end part, a tail end wall facing the tail end part and a containing groove part positioned between the limiting arm part and the tail end wall, when the wire holder is at the wire connection position, the second end part of the guide rod is positioned in the containing groove part, and a space for the guide rod to pass through is formed above or beside the limiting arm part.

Preferably, the guide plate is further provided with a second limiting groove communicated with the head end portion of the guide groove, the second limiting groove extends outwards from the head end portion of the guide groove, and when the wire holder is at the non-wire connection position, the second end portion of the guide rod is located in the second limiting groove.

Preferably, the wiring device further comprises a locking mechanism for locking the wire holder in a non-wire connection position, the locking mechanism being connected between the base and the link or between the link and the link arm.

Preferably, the locking mechanism comprises at least one pair of clamping pieces arranged on the base, when the locking mechanism is in an unlocking state, the wire holder is in the non-wire connection state, the connecting rod is clamped between the clamping pieces, and when the locking mechanism is in the unlocking state, the connecting rod is separated from the clamping pieces.

Preferably, each clamping piece is provided with a connecting end connected to the base and a clamping end far away from the base, a gap for the connecting rod to be clamped in is arranged between the clamping ends of the hijacking piece, and the clamping piece is elastic and can allow the connecting rod to be clamped in or separated from the gap.

Preferably, the locking mechanism further comprises a plurality of guide members, each of the clamping members is fixedly connected with or integrally formed with one of the guide members, and the guide members have guide inclined surfaces for guiding the insertion of the link into the gap.

The invention also provides a photovoltaic inverter, which comprises a shell and is characterized by further comprising the wiring device, wherein the wiring device is arranged in the shell, and the shell is provided with a through hole for the wire holder to enter and exit the shell.

Compared with the prior art, the invention has the following advantages:

According to the wiring device of the power electronic equipment, the wiring piece is arranged on the wiring seat, and the wiring seat can be moved out of the shell of the power electronic equipment so as to conveniently connect and conduct an external lead (such as a power and/or signal input line or output line) with the wiring piece, after wiring is finished, the wiring seat is retracted into the shell, and the wiring can be conveniently and rapidly carried out without additionally arranging a wiring box exposed out of the shell, so that the wiring box is prevented from occupying an installation space additionally, the original design and modeling of the power electronic equipment can be kept, and the wiring device is attractive. The photovoltaic inverter provided by the invention adopts the wiring device, so that the wiring can be conveniently and rapidly carried out, and meanwhile, a junction box exposed outside the shell is not required to be additionally arranged, thus the junction box is prevented from occupying an installation space additionally, the original design and modeling can be kept, and the photovoltaic inverter is attractive.

Drawings

In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIGS. 1a, 1b are perspective views of a portion of a photovoltaic inverter according to an embodiment of the present invention;

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

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

FIG. 4 is a schematic diagram of a front view of a linkage mechanism according to an embodiment of the present invention;

FIG. 5 is a schematic rear view of a linkage mechanism according to an embodiment of the present invention;

fig. 6 is a schematic diagram showing a front view of a guide plate according to an embodiment of the present invention;

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

FIG. 8 is a schematic view of a locking mechanism according to an embodiment of the present invention;

Fig. 9 is a schematic structural view of a guide bar according to an embodiment of the present invention;

FIG. 10 is a schematic view of a wire connector according to an embodiment of the present invention;

Fig. 11 is a schematic front view of a wiring device of a power electronic apparatus according to an embodiment of the present invention, in which a wire holder is in a non-wired state;

fig. 12 is a schematic rear view of a wiring device of a power electronic apparatus according to an embodiment of the present invention, in which a wire holder is in a non-wired state;

Fig. 13 is a schematic front view of a wiring device of a power electronic apparatus according to an embodiment of the present invention, in which a wire holder is in a wired state;

fig. 14 is a schematic rear view of a wiring device of a power electronic apparatus according to an embodiment of the present invention, in which a wire holder is in a wired state.

Wherein, the

1. Terminal block 11, wire pressing screw 2, housing 3, link mechanism 31, base 32, link 33, link arm 34, hinge 35, guide hole 4, guide plate 41, guide slot 411, tail end 412, head end 413, first limit groove 4131, limit wall 4132, end wall 4133, accommodation groove 414, second limit groove 5, guide rod 51, first end 52, second end 53, rod cap 6, locking mechanism 61, clip 62, straight plate 63, guide piece 631, connecting end 632, clip end 633, gap 634, guide slope 64, fixing plate 7, connecting hole 8, fastening hole 9, through hole.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

The embodiment provides a wiring device of power electronic equipment, in particular to a wiring device of a photovoltaic inverter. In other embodiments, the power electronics are frequency converters or uninterruptible power supplies. The embodiment also provides a photovoltaic inverter with the wiring device.

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

Referring to fig. 2 to 14, the wiring device includes a wiring member for connection with an external wire, which is a transmission line for inputting power or signals to the inverter or a transmission line for transmitting power or signals output from the inverter. The wiring device further comprises a wiring seat for being movably connected to the housing 2 of the power electronic equipment, the wiring piece being arranged on the wiring seat, the wiring seat having a non-wiring position inside the housing 2 of the photovoltaic inverter and a wiring position outside the housing 2. Specifically, in this embodiment, the wire holder includes a terminal block 1, and the wire member includes a wire pressing screw provided on the terminal block 1. The terminal block 1 is an electronic component for circuit connection, and is commonly used for electrical connection between the inside and outside of the housing 2 or between boards, and is provided with two fastening holes 8 and a plurality of wire pressing screws 11 for wiring, as shown in fig. 10.

The wiring device further includes a driving 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 housing 2, and as shown in fig. 2, 3 and 4, the link mechanism 3 includes a base 31, a link 32, and a link arm 33, one end portion of the link 32 is rotatably connected to the base 31, the other end portion of the link 32 is rotatably connected to the link arm 33, and the terminal block 1 is provided on the link arm 33. The link 32 is connected to the link arm 33 and the link 32 is connected to the base 31 by a pivot 34, and can rotate relatively. The link arm 33 is bent to have both ends connected to each other, and has two fastening holes for fixing the terminal block 1 to the link arm 33 at one end and a guide hole 35 at the other end.

The wiring device further comprises a guiding mechanism, as shown in fig. 5 to 7 and 9, which comprises a guiding rod 5 and a guiding plate 4 for connecting to the housing 2, wherein the guiding plate 4 is provided with a guiding groove 41, a first end part of the guiding rod 5 is inserted into the guiding hole 35 to be connected to the connecting rod arm 33, and a second end part 52 of the guiding rod 5 is connected to a rod cap 53 and is slidably inserted into the guiding groove 41. The guide groove 41 is arc-shaped and the center of the arc falls on the axis of rotation of the link 32 (i.e., the axis of the hinge 34 connected between the link and the base), and the guide groove 41 has a head end portion 412 and a tail end portion 411. The guide plate 4 is further provided with a first limit groove 413 communicated with the tail end 411 of the guide groove 41, the first limit groove 413 extends outwards from the tail end 411 of the guide groove 41, 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 non-wiring position and the wiring position switching process, and the second end 52 of the guide rod 5 is located in the first limit groove 413 when the terminal block 1 is in the wiring position. The first limiting groove 413 has a limiting wall portion 4131 facing away from the tail end portion 411, a tip end wall portion 4132 facing the tail end portion 411, and a receiving groove portion 4133 located between the limiting wall portion 4131 and the tip end wall, wherein when the terminal block 1 is at the wire connection position, the second end portion 52 of the guide rod 5 is located in the receiving groove portion 4133, and the guide rod 5 cannot move when located in the receiving groove, and a space for the guide rod 5 to pass through is formed above or laterally of the limiting wall portion 4131. The limiting wall 4131 is inclined, as shown in fig. 6, and extends from bottom to top gradually away from the tail end 411 of the guide slot 41, and a space for the guide rod to enter and exit is provided above the limiting wall 4131. When the guide bar enters the accommodating groove portion 4133, the terminal block will be maintained at its wiring position due to the blocking of the stopper arm portion 4131, avoiding accidental withdrawal of the housing. Only after the completion of the wiring, the terminal block 1 is slightly lifted upward, and the guide bar passes through the space above the limit arm 4131, so that the guide bar can slide out of the first limit groove 413. The guide plate 4 is further provided with a second limiting groove 414 communicated with the head end 412 of the guide groove 41, the second limiting groove 414 extends outwards from the head end 412 of the guide groove 41, and when the terminal block 1 is at the non-wiring position, the second end 52 of the guide rod 5 is positioned in the second limiting groove 414. The guide plate 4 is bent to have both ends connected to each other, and the guide groove 41 is provided with a connecting hole 7 at one end and the other end.

As shown in fig. 8, the wiring device further includes a locking mechanism 6. The locking mechanism 6 includes at least one pair of clamping members 61 provided on the base 31, when the locking mechanism 6 is in the unlocked state, the wire holder is in the non-wire connection state, the link 32 is clamped between the clamping members 61, and when the locking mechanism 6 is in the unlocked state, the link 32 is disengaged from the clamping members 61. Each clamping member 61 has a connection end 631 connected to the base 31 and a clamping end 632 far from the base 31, a gap 633 for the connecting rod 32 to be clamped in is provided between the clamping ends 632 of the clamping members 61, the clamping members 61 have elasticity to allow the connecting rod 32 to be clamped in or out 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 further comprises a plurality of guide members 63, each of the holding members 61 being fixedly connected to or integrally formed with one of the guide members 63, the guide members 63 having guide inclined surfaces 634 for guiding the insertion of the link 32 into the gap 633.

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 one short end of one clamping member 61, the other short end is connected to one short end of the other clamping member 61, when the transmission rod slides to the first limiting groove 413, the connecting rod 32 is clamped in the gap 633 between the elastic sheets, and when the guide rod 5 slides to the second limiting groove 414, the connecting rod 32 is separated 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. The guide 63 has a gap 633 therebetween, and the width of the gap 633 is smaller than the cross-sectional diameter of the link 32. The guide members 63 further have guide inclined surfaces 634, each guide member 63 corresponds to one of the guide inclined surfaces 634, and the long sides of the guide inclined surfaces 634 are connected with the width of the clamping member 61, and the inclined surfaces are long and narrow rectangular. The two guide inclined surfaces 634 are opposite and are arranged at an angle to each other, and a structure with a wide upper part and a narrow lower part is formed, so that the connecting rod 32 is guided to enter the gap 633 from the upper part and move downwards continuously, and then is clamped and fixed between the guide inclined surfaces 634, or is moved upwards between the guide inclined surfaces 634 and then is separated from the gap 633. The guide 63 is made of a metal material having elasticity, and ensures that the elasticity can be maintained for a long period of time. At the same time, the clamping member 61 connects to and supports the guide member 63, and also functions in part in the event of 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 with the link mechanism 3 through the connecting hole 7.

The wiring device also comprises a fastener which is used for connecting and fixing different components, and the fastener can be a connecting piece such as a screw. The fastener can pass through the fastening holes 8 provided on both the terminal block 1 and the link arm 33, thereby fixing the terminal block 1 to the link arm 33.

The assembly process of the wiring device is as follows:

A. The link mechanism 3 is assembled by assembling the link arm 33 to the base 31 and then assembling the link arm 33 to the link arm 33.

B. assembling the guide plate 4, and fixing the guide plate 4 on the shell 2.

C. the link mechanism 3 is fixed, the base 31 of the link mechanism 3 is fixed on the housing 2, and the link arm 33 is ensured to be parallel to the guide plate 4.

D. The guide rod 5 is assembled by passing the first end 51 of the guide rod 5 through the through hole 9 in the guide plate 4 and fixing it with the rod cap 53, and the second end 52 passing through the guide hole 35 in the link arm 33 and limiting it with the pin fit.

E. fixing the locking mechanism 6. The locking mechanism 6 is fixed to the base 31.

F. the terminal block 1 is assembled by fastening the terminal block 1 to the link arm 33 by passing a fastener through the connection hole 7 on the terminal block 1.

Based on the wiring device, a wiring method comprises the following steps:

When the terminal block 1 is not connected or prevented from moving, the guide rod 5 slides to be positioned in the first limiting groove 413, at the moment, the connecting rod 32 is clamped in the gap 633 between the guide pieces 63, the guide pieces 63 deform to fix the connecting rod 32 after being stressed, and the terminal block 1 is in the first state, as shown in fig. 11 to 12;

When wiring, the guide rod 5 slides to the second limit groove 414, at this time, the connecting rod 32 is separated from the guide piece 63, the terminal block 1 extends out relative to the shell 2, the wire pressing screw 11 on the terminal block 1 is exposed, and an electrician can perform wiring operation, and the connecting rod mechanism 3 and the terminal block 1 cannot shake due to the fact that the guide rod 5 can be fixed in the second limit groove 414, as shown in fig. 13 to 14;

After wiring is finished, the terminal block 1 is lifted upwards, the transmission piece 5 is separated from the second limiting groove 414 and slides to the first limiting groove 413, the connecting rod 32 is clamped between the guide pieces 63 again, the guide pieces 63 are stressed and tightened, the terminal block 1 returns to the first state, and the cover plate is covered on the terminal block 1.

According to the wiring device of the power electronic equipment and the photovoltaic inverter, the terminal block is fixed on the connecting rod mechanism, the connecting rod mechanism is connected with the guide rod, and the guide rod drives the terminal block on the connecting rod mechanism to move according to a preset track through the guide plate. The terminal block has a wiring position and a non-wiring position, and in the wiring position, the terminal block can be positioned outside the housing to complete wiring work, and in the non-wiring position, the terminal block can be positioned inside the housing to complete wiring without using a junction box. The deflector can use the flat board of ordinary material, can make wiring work reliable fast, and can make the product outward appearance comparatively pleasing to the eye, reduces product overall dimension, reduces the installation space requirement, promotes product competitiveness.

The above-described embodiments are provided for illustrating the technical concept and features of the present invention, and are intended to be preferred embodiments for those skilled in the art to understand the present invention and implement the same according to the present invention, not to limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A wiring device for a power electronic device, comprising a wiring member for connecting to an external wire, characterized in that the wiring device further comprises a wiring seat for movably connecting to a housing of the power electronic device, the wiring member being disposed on the wiring seat, the wiring seat having a non-wiring position located within the housing of the power electronic device and a wiring position located outside the housing, and the wiring device further comprising a drive mechanism for driving the wiring seat to move between the non-wiring position and the wiring position;

The driving mechanism includes a connecting rod mechanism connected to the housing, the connecting rod mechanism includes a base, a connecting rod and a connecting rod arm, one end of the connecting rod 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 provided on the connecting rod arm;

The wiring device further includes a guide mechanism, the guide mechanism including a guide rod and a guide plate for connecting to the housing, the guide plate being provided with a guide groove, the first end of the guide rod being connected to the connecting rod arm or the wiring seat, and the second end of the guide rod being slidably inserted into the guide groove;

The guide groove is arc-shaped and the center of the arc falls on the rotation axis of the connecting rod. The guide groove has a head end and a tail end; the guide plate is also provided with a first limiting groove connected to the tail end of the guide groove, and the first limiting groove extends outward from the tail end of the guide groove; when the wiring seat is switching between the non-wiring position and the wiring position, the second end of the guide rod can be slidably located in the guide groove; when the wiring seat is in the wiring position, the second end of the guide rod is located in the first limiting groove.

2. The wiring device according to claim 1 is characterized in that the first limiting groove has a limiting wall portion facing away from the tail end portion, an end wall portion facing the tail end portion, and a accommodating groove portion located between the limiting wall portion and the end wall, and when the wiring seat is in the wiring position, the second end of the guide rod is located in the accommodating groove portion; a space for the guide rod to pass through is formed above or on the side of the limiting arm portion; and/or the guide plate is further provided with a second limiting groove connected to the head end portion of the guide groove, the second limiting groove extending outward from the head end portion of the guide groove; when the wiring seat is in the non-wiring position, the second end of the guide rod is located in the second limiting groove.

3. The wiring device according to claim 1 is characterized in that the wiring device further includes a locking mechanism for locking the wiring seat in a non-wiring position, and the locking mechanism is connected between the base and the connecting rod or between the connecting rod and the connecting rod arm.

4. The wiring device according to claim 3 is characterized in that the locking mechanism includes at least one pair of clamping members arranged on the base, when the locking mechanism is in the unlocked state, the wiring seat is in the non-wiring position, and the connecting rod is clamped between the clamping members; when the locking mechanism is in the unlocked state, the connecting rod is disengaged from the clamping members.

5. The wiring device according to claim 4, wherein each of the clamping members has a connection end connected to the base and a clamping end farther from the base, a gap is defined between the clamping ends of the clamping members for the connecting rod to be inserted into, and the clamping members are elastic and can allow the connecting rod to be inserted into or removed from the gap.

6. The wiring device according to claim 5, characterized in that the locking mechanism further comprises a plurality of guide members, each of the clamping members is fixedly connected to or integrally formed with one of the guide members, and the guide members have a guiding slope for guiding the connecting rod to be inserted into the gap.

7. A photovoltaic inverter, comprising a housing, characterized in that the photovoltaic inverter further comprises a wiring device according to any one of claims 1 to 6, wherein the wiring device is arranged in the housing, and the housing is provided with a through hole for the wiring seat to enter and exit the housing.