Compact active filter and assembly method therefor

Abstract

Disclosed in the present invention is a compact active filter, comprising an upper housing component, a lower housing component, a front cover component and a rear cover component, which are detachably connected, wherein the upper housing component comprises an upper housing, and an upper capacitor IGBT board, an upper inductor board and a main control board, which are fixed to the inner top surface of the upper housing, the upper capacitor IGBT board being fixed to the inner front end of the upper housing, and the main control board and the upper inductor board being fixed side by side to the inner rear end of the upper housing; the lower housing component comprises a lower housing, and a lower capacitor IGBT board, a lower inductor board and a power supply board, which are fixed in the lower housing, the lower capacitor IGBT board being fixed to the inner front end of the lower housing, and the lower inductor board and the power supply board being fixed to the inner rear end of the lower housing; when the upper housing component covers the lower housing component, the upper housing is fixedly connected to the lower housing, the upper capacitor IGBT board and the lower capacitor IGBT board are arranged opposite each other, and a capacitor group and a heat sink on the upper capacitor IGBT board are arranged by respectively corresponding to a heat sink and a capacitor group on the lower capacitor IGBT board on a one-to-one basis; and the upper inductor board and the lower inductor board are arranged opposite each other, and an inductor group on the upper inductor board and an inductor group on the lower inductor board are arranged in a staggered manner.

Description

Compact active filter and assembling method thereof TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to a compact active filter and an assembling method thereof. BACKGROUND

[0002] At present, the large-capacity active filter with a capacity of more than 100A on the market is usually installed in a flat manner in the shell, and then the upper cover is installed. The flat installation of the internal components occupies a large space, resulting in excessive width, so that it cannot be installed in many standard power distribution cabinets due to insufficient width, and cannot be applied in many industrial occasions. If the internal components are arranged in a concentrated manner to reduce the space occupation, the internal heat will be concentrated, causing the temperature of the active filter to be too high and causing failure. In addition, the internal components are installed in the shell, and each component needs to be installed one by one, which is low in installation efficiency. SUMMARY

[0003] The present application provides a novel compact active filter and an assembling method thereof to solve the problems and deficiencies of the prior art.

[0004] The present application solves the above technical problems by the following technical solutions:

[0005] The present application provides a compact active filter, which comprises detachably connected upper shell component, lower shell component, front cover component and rear cover component.

[0006] The upper shell component comprises an upper shell, an upper capacitor IGBT plate, an upper inductor plate and a main control plate fixed to the inner top surface of the upper shell. The upper capacitor IGBT plate is fixed to the front end in the upper shell. The upper inductor plate is fixed to the rear end in the upper shell. The main control plate is fixed to the rear end in the upper shell in parallel with the upper inductor plate.

[0007] The lower shell component comprises a lower shell, a lower capacitor IGBT plate, a lower inductor plate and a power supply plate fixed to the lower shell. The lower capacitor IGBT plate is fixed to the front end in the lower shell. The lower inductor plate is fixed to the rear end in the lower shell. The power supply plate is fixed to one side of the rear end in the lower shell.

[0008] Each of the upper capacitor IGBT plate and the lower capacitor IGBT plate is provided with three capacitor groups and three heat sinks corresponding to A phase, B phase and C phase, respectively. The three capacitor groups and the three heat sinks of the upper capacitor IGBT plate and the lower capacitor IGBT plate are sequentially and spacedly arranged.

[0009] Each of the upper inductor plate and the lower inductor plate is provided with three inductor groups corresponding to A phase, B phase and C phase, respectively. The three inductor groups of the upper inductor plate and the lower inductor plate are sequentially arranged.

[0010] When the upper shell part covers the lower shell part, the upper shell and the lower shell are fixedly connected, the upper capacitor IGBT plate and the lower capacitor IGBT plate are oppositely arranged, and the three capacitor groups of the upper capacitor IGBT plate and the three heat sinks of the lower capacitor IGBT plate are arranged one by one in a corresponding manner; the upper inductor plate and the lower inductor plate are oppositely arranged, and the three inductor groups of the upper inductor plate and the three inductor groups of the lower inductor plate are staggered; the main control plate and the power supply plate are located on the same side.

[0011] The front cover part comprises a front cover and a fan arranged on the inner side of the front cover, and the front cover is provided with an air inlet;

[0012] The rear cover part comprises a rear cover and an interface plate fixed to the inner side of the rear cover, and the interface plate is arranged on the side of the rear cover close to the power supply plate and the main control plate, and the rear cover is provided with an air outlet;

[0013] The front cover part and the rear cover part cover the front end and the rear end of the fixedly connected upper shell part and the lower shell part, respectively, and the front cover and the rear cover are fixedly connected with the upper shell and the lower shell, respectively.

[0014] Optionally, the lower shell is in a U shape, the upper shell is in an inverted U shape, and the two side edges of the lower shell extend upwardly to have first connecting wings inserted into the upper shell and connected with the upper shell through screws.

[0015] Optionally, the front side edges of the lower shell and the upper shell are each provided with a second connecting wing inserted into the front cover and connected with the front cover through screws, and the rear edge of the rear cover is provided with a third connecting wing inserted into the rear end of the fixedly connected upper shell and lower shell and connected with the lower shell through screws.

[0016] Optionally, the rear end of the lower shell is provided with protective wings on both sides.

[0017] Optionally, the upper side of the rear cover is provided with an interface hole matched with a connecting interface of the interface plate, and when the interface plate is fixed to the rear cover, the connecting interface passes out of the interface hole.

[0018] Optionally, the rear cover is further provided with a power supply terminal, the power supply terminal is connected with a wiring copper bar on the inner side of the rear cover, and the wiring copper bar is bent towards the direction close to the power supply plate.

[0019] Optionally, the front cover is provided with a handle.

[0020] Based on the same concept, the application further provides an assembling method of the compact active filter.

[0021] A lower shell, a lower capacitor IGBT plate, a lower inductor plate and a power supply plate are provided, and the lower capacitor IGBT plate, the lower inductor plate and the power supply plate are sequentially fixed into the lower shell by screws to assemble a lower shell component;

[0022] An upper shell, an upper capacitor IGBT plate, an upper inductor plate and a main control plate are provided, and the upper capacitor IGBT plate, the upper inductor plate and the main control plate are sequentially fixed into the upper shell by screws to assemble an upper shell component;

[0023] A front cover and a fan are provided, and the fan is fixed to the front cover to assemble a front cover component;

[0024] A rear cover, an interface plate, a power supply terminal and a wiring copper bar are provided, the power supply terminal and the interface plate are fixed to the rear cover by screws, and the wiring copper bar is connected with the power supply terminal to assemble a rear cover component;

[0025] The line connection between the respective elements of the lower shell component and the upper shell component is completed, the upper shell component is covered to the lower shell component, the first connecting wing of the lower shell is inserted into the upper shell and connected with the upper shell by screws;

[0026] The line connection between the main control plate and the fan is completed, the front cover component is covered to the front end of the fixed and connected upper shell component and lower shell component, the second connecting wing of the upper shell and the lower shell is inserted into the front cover and connected with the front cover by screws;

[0027] The line connection between the main control plate and the interface plate and between the wiring copper bar and the power supply plate is completed, the rear cover component is covered to the rear end of the fixed and connected upper shell component and lower shell component, the third connecting wing of the rear cover is inserted into the upper shell and the lower shell and connected with the lower shell by screws, and the installation is completed.

[0028] The positive progress effect of the present application is that:

[0029] The compact active filter provided by the application is provided with detachably connected upper shell part, lower shell part, front cover part and rear cover part; the upper shell part comprises an upper shell, an upper capacitor IGBT plate fixed to the inner top surface of the upper shell, an upper inductor plate and a main control plate, the lower shell part comprises a lower shell, a lower capacitor IGBT plate fixed to the inner top surface of the lower shell, a lower inductor plate and a power supply plate, when the upper shell part is covered to the lower shell part, the upper shell is fixedly connected with the lower shell, the upper capacitor IGBT plate is oppositely arranged with the lower capacitor IGBT plate, the upper inductor plate is oppositely arranged with the lower inductor plate, the upper and lower capacitor IGBT plates are oppositely arranged with the upper and lower inductor plates, and the upper and lower capacitor IGBT plates are oppositely arranged with the upper and lower inductor plates, thereby improving the space utilization, greatly reducing the product size and improving the product applicability; meanwhile, the detachable modular assembly improves the assembly efficiency.

[0030] Further, the three capacitor groups of the upper capacitor IGBT plate and the three heat sinks of the lower capacitor IGBT plate are one-to-one correspondingly arranged, the heat generating parts are correspondingly arranged with the heat sinks, and the heat dissipation performance is improved; the three inductor groups of the upper inductor plate are staggered with the three inductor groups of the lower inductor plate, the heat generating parts are staggered, and the heat dissipation performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 is a split schematic diagram of the compact active filter of the embodiment of the application;

[0032] Fig. 2 is an exploded view of the compact active filter of the embodiment of the application;

[0033] Fig. 3 is a structural schematic diagram of the lower shell part of the compact active filter of the embodiment of the application;

[0034] Fig. 4 is a structural schematic diagram of the upper shell part of the compact active filter of the embodiment of the application;

[0035] Fig. 5 is a structural schematic diagram of the front cover part of the compact active filter of the embodiment of the application;

[0036] Fig. 6 is a structural schematic diagram of the rear cover part of the compact active filter of the embodiment of the application;

[0037] Fig. 7 is a schematic diagram of the relative positions of the upper capacitor IGBT plate and the lower capacitor IGBT plate of the compact active filter of the embodiment of the application;

[0038] Fig. 8 is a side view of the relative positions of the upper capacitor IGBT plate and the lower capacitor IGBT plate of the compact active filter of the embodiment of the application;

[0039] Fig. 9 is a schematic diagram of the relative positions of the upper inductor plate, the lower inductor plate, the main control plate and the interface plate of the compact active filter of the embodiment of the application;

[0040] Figure 10 is a side view of the relative positions of the upper inductor plate, the lower inductor plate, the main control plate and the interface plate of the compact active filter according to the embodiment of the present application.

[0041] In the figure: 1, lower shell part; 11, lower shell; 111, first connecting wing; 112, second connecting wing; 113, protective wing; 12, lower capacitor IGBT plate; 121, capacitor group; 122, heat sink; 13, lower inductor plate; 131, inductor group; 14, power supply plate; 2, upper shell part; 21, upper shell; 211, second connecting wing; 22, upper capacitor IGBT plate; 221, capacitor group; 222, heat sink; 23, upper inductor plate; 231, inductor group; 24, main control plate; 3, front cover part; 31, front cover; 32, fan; 33, handle; 4, rear cover part; 41, rear cover; 411, third connecting wing; 42, interface plate; 43, power supply terminal; 44, wiring copper bar. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] Please refer to Figures 1-10, the present embodiment provides a compact active filter, which comprises detachably connected upper shell part 2, lower shell part 1, front cover part 3 and rear cover part 4.

[0044] The upper shell part 2 comprises upper shell 21 and upper capacitor IGBT plate 22, upper inductor plate 23 and main control plate 24 fixed to the inner top surface of the upper shell 21. The upper capacitor IGBT plate 22 is fixed to the front end inside the upper shell 21, the upper inductor plate 23 is fixed to the rear end inside the upper shell 21, and the main control plate 24 is fixed to the rear end inside the upper shell 21 side by side with the upper inductor plate 23.

[0045] The lower shell part 1 comprises lower shell 11 and lower capacitor IGBT plate 12, lower inductor plate 13 and power supply plate 14 fixed to the inside of the lower shell 11. The lower capacitor IGBT plate 12 is fixed to the front end inside the lower shell 11, the lower inductor plate 13 is fixed to the rear end inside the lower shell 11, and the power supply plate 14 is fixed to one side of the rear end inside the lower shell 11.

[0046] The upper capacitor IGBT plate 22 and the lower capacitor IGBT plate 12 are provided with three capacitor groups 221, 121 and three radiators 222, 122 corresponding to the A-phase, B-phase and C-phase respectively, and the three capacitor groups 221, 121 and the three radiators 222, 122 of the upper capacitor IGBT plate 22 and the lower capacitor IGBT plate 12 are arranged in sequence and spaced apart.

[0047] The upper inductor plate 23 and the lower inductor plate 13 are provided with three inductor groups 231, 131 corresponding to the A-phase, B-phase and C-phase respectively, and the three inductor groups 231, 131 of the upper inductor plate 23 and the lower inductor plate 13 are arranged in sequence.

[0048] When the upper shell part 2 is covered to the lower shell part 1, the upper shell 21 is fixedly connected with the lower shell 11, the upper capacitor IGBT plate 22 is arranged opposite to the lower capacitor IGBT plate 12, and the three capacitor groups 221 and the three radiators 222 of the upper capacitor IGBT plate 22 are arranged corresponding to the three radiators 122 and the three capacitor groups 121 of the lower capacitor IGBT plate 12 respectively, the heat generating components and the radiators 122, 222 are arranged corresponding to each other, the heat dissipation performance is improved; the upper inductor plate 23 is arranged opposite to the lower inductor plate 13, and the three inductor groups 231 of the upper inductor plate 23 are arranged staggered to the three inductor groups 131 of the lower inductor plate 13, the heat generating components are arranged staggered, the heat dissipation performance is improved; the main control board 24 and the power board 14 are located on the same side; the upper and lower capacitor IGBT plates and the upper and lower inductor plates are installed in an upper and lower clamping manner, the space utilization rate is improved, the product size is greatly reduced, and the applicability of the product is improved.

[0049] The front cover part 3 includes a front cover 31 and a fan 32 arranged on the inner side of the front cover 31, and the front cover 31 is provided with an air inlet.

[0050] The rear cover part 4 includes a rear cover 41 and an interface plate 42 fixed to the inner side of the rear cover 41, the interface plate 42 is arranged on one side of the rear cover 41 close to the power board 14 and the main control board 24, and the rear cover 41 is provided with an air outlet.

[0051] The front cover part 3 and the rear cover part 4 are respectively covered to the front end and the rear end of the fixedly connected upper shell part 2 and the lower shell part 1, and the front cover 31 and the rear cover 41 are respectively fixedly connected with the upper shell 21 and the lower shell 11; the upper shell part 2, the lower shell part 1, the front cover part 3 and the rear cover part 4 are detachably modularly assembled, each part is assembled and then assembled as a whole, and the assembly efficiency is improved.

[0052] In some embodiments, the lower shell 11 is in a U shape, and the upper shell 21 is in an inverted U shape, the first connecting wing 111 extends upward from the two side edges of the lower shell 11, and the first connecting wing 111 is inserted into the upper shell 21 and connected with the upper shell 21 through screws.

[0053] In some embodiments, the lower shell 11 and the upper shell 21 are provided with second connecting wings 112, 211 on the front side edges, which are inserted into the front cover 31 and connected to the front cover 31 by screws; the rear cover 41 is provided with a third connecting wing 411, which is inserted into the rear end of the fixedly connected upper shell 21 and lower shell 11 and connected to the lower shell 11 by screws.

[0054] In some embodiments, the lower shell 11 is provided with protective wings 113 on both sides of the rear end, which play a protective role and avoid damage to the interface board 42 or the power terminal 43 on the rear cover 41 caused by impact with external objects during movement.

[0055] In some embodiments, the rear cover 41 is provided with an interface hole matching the connecting interface of the interface board 42 on the upper side, and when the interface board 42 is fixed to the rear cover 41, the connecting interface is pulled out of the interface hole, facilitating the connection of external devices.

[0056] In some embodiments, the rear cover 41 is also provided with a power terminal 43, and the power terminal 43 is connected to a wiring copper bar 44 on the inner side of the rear cover 41, which is bent towards the power panel 14, facilitating connection with the power panel 14.

[0057] In some embodiments, the front cover 31 is provided with a handle 33, facilitating the movement of the active filter.

[0058] The embodiment also provides an assembly method of the compact active filter, comprising the following steps:

[0059] The lower shell 11, the lower capacitor IGBT panel 12, the lower inductor panel 13, and the power panel 14 are provided, and the lower capacitor IGBT panel 12, the lower inductor panel 13, and the power panel 14 are sequentially fixed to the lower shell 11 by screws to assemble the lower shell component 1;

[0060] The upper shell 21, the upper capacitor IGBT panel 22, the upper inductor panel 23, and the main control panel 24 are provided, and the upper capacitor IGBT panel 22, the upper inductor panel 23, and the main control panel 24 are sequentially fixed to the upper shell 21 by screws to assemble the upper shell component 2;

[0061] The front cover 31 and the fan 32 are provided, and the fan 32 is fixed to the front cover 31 to assemble the front cover component 3;

[0062] The rear cover 41, the interface board 42, the power terminal 43, and the wiring copper bar 44 are provided, and the power terminal 43 and the interface board 42 are fixed to the rear cover 41 by screws, and the wiring copper bar 44 is connected to the power terminal 43 to assemble the rear cover component 4;

[0063] After the connection between the lower shell part 1 and the upper shell part 2 is completed, the upper shell part 2 is covered on the lower shell part 1, so that the first connecting wing 111 of the lower shell 11 is inserted into the upper shell 21 and connected with the upper shell 21 through screws;

[0064] After the connection between the main control board 24 and the fan 32 is completed, the front cover part 3 is covered on the front end of the fixedly connected upper shell part 2 and lower shell part 1, so that the second connecting wings 211, 112 of the upper shell 21 and lower shell 11 are inserted into the front cover 31 and connected with the front cover 31 through screws;

[0065] After the connection between the main control board 24 and the interface board 42 and the connection between the copper wire 44 and the power board 14 are completed, the rear cover part 4 is covered on the rear end of the fixedly connected upper shell part 2 and lower shell part 1, so that the third connecting wing 411 of the rear cover 41 is inserted into the upper shell 21 and lower shell 11 and connected with the lower shell 11 through screws, and the installation is completed.

[0066] In summary, the compact active filter provided by the application sets the detachably connected upper shell part 2, lower shell part 1, front cover part 3 and rear cover part 4; the upper shell part 2 comprises an upper shell 21, an upper capacitor IGBT board 22 fixed to the inner top surface of the upper shell 21, an upper inductor board 23 and a main control board 24; the lower shell part 1 comprises a lower shell 11 and a lower capacitor IGBT board 12, a lower inductor board 13 and a power board 14 fixed to the lower shell 11; when the upper shell part 2 is covered on the lower shell part 1, the upper shell 21 is fixedly connected with the lower shell 11, the upper capacitor IGBT board 22 is oppositely arranged with the lower capacitor IGBT board 12, the upper inductor board 23 is oppositely arranged with the lower inductor board 13, and the upper and lower capacitor IGBT boards and the upper and lower inductor boards are oppositely buckled, thereby improving the space utilization, greatly reducing the product size and improving the product applicability; meanwhile, the detachable modular assembly improves the assembly efficiency.

[0067] Further, the three capacitor groups 221 and three heat sinks 222 of the upper capacitor IGBT board 22 are correspondingly arranged with the three heat sinks 122 and three capacitor groups 121 of the lower capacitor IGBT board 12, the heat generating components are correspondingly arranged with the heat sinks 122, 222, and the heat dissipation performance is improved; the three inductor groups 231 of the upper inductor board 23 are staggered with the three inductor groups 131 of the lower inductor board 13, the heat generating components are staggered, and the heat dissipation performance is improved.

[0068] Although the specific embodiments of the application are described above, those skilled in the art should understand that these are only examples, the protection scope of the application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the application, and these changes and modifications all fall within the protection scope of the application.

Claims

1. A compact active filter, characterized in that comprising detachably connected upper shell part, lower shell part, front cover part and rear cover part; The upper shell part comprises an upper shell, an upper capacitor IGBT plate fixed to the inner top surface of the upper shell, an upper inductor plate and a main control plate, the upper capacitor IGBT plate is fixed to the front end of the upper shell, the upper inductor plate is fixed to the rear end of the upper shell, and the main control plate is fixed to the rear end of the upper shell side by side with the upper inductor plate; The lower shell part comprises a lower shell, a lower capacitor IGBT plate fixed to the inner top surface of the lower shell, a lower inductor plate and a power supply plate, the lower capacitor IGBT plate is fixed to the front end of the lower shell, the lower inductor plate is fixed to the rear end of the lower shell, and the power supply plate is fixed to one side of the rear end of the lower shell; The upper capacitor IGBT plate and the lower capacitor IGBT plate are provided with three capacitor groups and three heat sinks corresponding to A, B and C phases respectively, and the three capacitor groups and the three heat sinks of the upper and lower capacitor IGBT plates are arranged in sequence and spaced apart; The upper inductor plate and the lower inductor plate are provided with three inductor groups corresponding to A, B and C phases respectively, and the three inductor groups of the upper inductor plate and the lower inductor plate are arranged in sequence; When the upper shell part is covered on the lower shell part, the upper shell and the lower shell are fixedly connected, the upper capacitor IGBT plate and the lower capacitor IGBT plate are opposite to each other, so that the three capacitor groups and the three heat sinks of the upper capacitor IGBT plate correspond to the three heat sinks and the three capacitor groups of the lower capacitor IGBT plate one by one respectively, the upper inductor plate and the lower inductor plate are opposite to each other, so that the three inductor groups of the upper inductor plate are staggered with the three inductor groups of the lower inductor plate, and the main control plate and the power supply plate are located on the same side; The front cover part comprises a front cover and a fan arranged on the inner side of the front cover, and the front cover is provided with an air inlet; The rear cover part comprises a rear cover and an interface plate fixed to the inner side of the rear cover, the interface plate is arranged on one side of the rear cover close to the power supply plate and the main control plate, and the rear cover is provided with an air outlet; The front cover part and the rear cover part are respectively covered on the front end and the rear end of the fixedly connected upper shell part and lower shell part, and the front cover and the rear cover are respectively fixedly connected with the upper shell and the lower shell; The front cover is provided with a handle.

2. The compact active filter of claim 1, wherein, The lower shell is in U shape, the upper shell is in inverted U shape, the first connecting wing is extended upward from the two side edges of the lower shell, and the first connecting wing is inserted into the upper shell and connected with the upper shell by screws.

3. The compact active filter of claim 1, wherein, The second connecting wing is arranged on the front side edge of the lower shell and the upper shell, the second connecting wing is inserted into the front cover and connected with the front cover by screws, and the third connecting wing is arranged on the edge of the rear cover, the third connecting wing is inserted into the rear end of the fixedly connected upper shell and lower shell and connected with the lower shell by screws.

4. The compact active filter of claim 1, wherein, The protection wing is arranged on the two sides of the rear end of the lower shell.

5. The compact active filter of claim 1, wherein, The interface hole matched with the connecting interface of the interface plate is arranged on the upper side of the rear cover, the connecting interface is out of the interface hole when the interface plate is fixed to the rear cover.

6. The compact active filter of claim 1, wherein, The power supply terminal is further arranged on the rear cover, the wiring copper bar is connected on the inner side of the rear cover, and the wiring copper bar is bent to the direction close to the power supply plate.

7. A method of assembling a compact active filter as claimed in any one of the claims 1-6, characterized in that, The method comprises the following steps: The lower shell, the lower capacitor IGBT plate, the lower inductor plate and the power supply plate are provided, the lower capacitor IGBT plate, the lower inductor plate and the power supply plate are fixed into the lower shell in sequence by screws, and the lower shell part is assembled. Providing an upper shell, an upper capacitor IGBT plate, an upper inductor plate and a main control plate, sequentially fixing the upper capacitor IGBT plate, the upper inductor plate and the main control plate into the upper shell by screws to assemble a lower shell component; Providing a front cover and a fan, fixing the fan to the front cover to assemble a front cover component; Providing a rear cover, an interface plate, a power terminal and a wiring copper bar, fixing the power terminal and the interface plate to the rear cover by screws, connecting the wiring copper bar and the power terminal to assemble a front cover component; Completing the line connection between the elements of the lower shell component and the upper shell component, covering the upper shell component to the lower shell component, so that the first connecting wing of the lower shell is inserted into the upper shell and connected by screws; Completing the line connection between the main control plate and the fan, covering the front cover component to the front end of the fixed and connected upper shell component and lower shell component, so that the second connecting wing of the upper shell and the lower shell is inserted into the front cover and connected by screws; Completing the line connection between the main control plate and the interface plate, and the line connection between the wiring copper bar and the power plate, covering the rear cover component to the rear end of the fixed and connected upper shell component and lower shell component, so that the third connecting wing of the rear cover is inserted into the upper shell and the lower shell and connected by screws, completing the installation.

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