Direct-current distribution power supply plug-in frame

Abstract

The utility model discloses a DC distribution power supply plug-in frame, comprising a housing; the connector is arranged at the rear part of the shell and is provided with a first positive electrode and a first negative electrode; the direct current cable is arranged in the shell, extends to the connector from the front part of the shell and is connected with the first positive electrode and the first negative electrode; the direct current output terminal is arranged at the front part of the shell and is provided with a second positive electrode and a second negative electrode; the anode copper bar assembly is arranged in the shell, and two ends of the anode copper bar assembly are respectively connected with the first anode and the second anode; and the cathode copper bar assembly is also arranged in the shell, and two ends of the cathode copper bar assembly are respectively connected with the first cathode and the second cathode. According to the utility model, the circuit breaker is matched with the direct current output terminal for use, so that the direct current positive and negative output cables are led out from the front part of the shell, the internal space of the shell is effectively prevented from being occupied, a larger operation space is provided for cable installation, and the installation efficiency is improved. And the installation, management and maintenance work of the output cable by a client is greatly facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of direct current distribution power supply, and in particular relates to a direct current distribution power supply plug-in frame. Background Art

[0002] In the existing DC power distribution system, bullet-type circuit breakers are usually used as protection elements to ensure the stable supply of DC power. However, the traditional bullet-type circuit breaker power distribution system has some limitations. The DC positive and negative output cables usually come out from the top of the frame, which not only complicates the installation and maintenance of the cables, but also takes up valuable space inside the cabinet, affecting the overall layout efficiency and maintainability. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a DC power distribution power supply frame, which not only improves the convenience of cable installation and maintenance, but also optimizes the use of the internal space of the cabinet.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0005] A DC power distribution power supply frame, comprising:

[0006] shell;

[0007] A connector, mounted on the rear of the housing, having a first positive electrode and a first negative electrode;

[0008] A DC cable is arranged in the housing, extends from the front of the housing to the connector, and is connected to the first positive electrode and the first negative electrode;

[0009] A DC output terminal is mounted on the front of the housing and is provided with a second positive pole and a second negative pole;

[0010] A positive copper busbar assembly is installed in the housing, and two ends of the assembly are connected to the first positive electrode and the second positive electrode respectively;

[0011] The negative electrode copper bar assembly is also installed in the shell, and its two ends are respectively connected to the first negative electrode and the second negative electrode.

[0012] Furthermore, it also includes a cable bracket for fixing the DC cable, and the cable bracket is arranged at the front part of the shell.

[0013] Furthermore, it also includes a cable channel for accommodating the DC cable, the cable channel is arranged in the shell, and two ends of the cable channel are respectively connected to the cable bracket and the rear of the shell.

[0014] Furthermore, the positive copper bar assembly includes a first positive copper bar and a second positive copper bar connected together, the first positive copper bar is arranged at the front of the shell, extends along the width direction of the shell, and is connected to the second positive electrode and the second positive copper bar; one end of the second positive copper bar is connected to the first positive copper bar, and the other end is connected to the first positive electrode.

[0015] Furthermore, the negative copper bar assembly includes a first negative copper bar and a second negative copper bar connected together, the first negative copper bar is connected to the second negative electrode and the second negative copper bar; one end of the second negative copper bar is connected to the first negative copper bar, and the other end is connected to the first negative electrode.

[0016] Furthermore, the negative copper bar assembly also includes a bottom branch copper bar and a top branch copper bar, one end of the top branch copper bar is connected to the first negative copper bar, and the other end is provided with a top adapter hole for connecting with the circuit breaker; one end of the bottom branch copper bar is provided with a bottom adapter hole for connecting with the circuit breaker, and the other end is connected to the second negative copper bar.

[0017] Furthermore, the negative copper bar assembly also includes a branch copper bar bracket, which is fixedly installed in the shell, the bottom branch copper bar is fixedly installed at the bottom of the branch copper bar bracket, and the top branch copper bar is movably installed at the top of the branch copper bar bracket.

[0018] Furthermore, the negative electrode copper bar assembly also includes a contactor, one end of the contactor is connected to the bottom branch copper bar, and the other end of the contactor is connected to the second negative electrode copper bar.

[0019] Furthermore, the negative copper bar assembly also includes a shunt, which is arranged between the contactor and the second negative copper bar, with one end of the shunt connected to the contactor and the other end connected to the second negative copper bar.

[0020] Furthermore, it also includes a tray for installing components, and the tray is slidably installed on the front part of the shell.

[0021] Furthermore, a guide limit slot is provided on the shell, and the tray is slidably disposed in the guide limit slot.

[0022] Furthermore, it also includes a DC output terminal bracket, which is installed on the front part of the shell, and the DC output terminal is installed on the DC output terminal bracket.

[0023] Beneficial effects of the utility model:

[0024] Compared with the output cable outlet method of the conventional bullet-shaped circuit breaker distribution system, the utility model adopts the use of a circuit breaker (preferably a bullet-shaped circuit breaker) in conjunction with a DC output terminal, and realizes the DC positive and negative output cables to be outlet from the front of the housing, effectively avoiding occupying the internal space of the housing, which not only provides a larger operating space for cable installation, but also greatly facilitates the installation, management and maintenance of the output cables by customers, making the configuration of the output cables to the equipment load more flexible. The utility model not only improves the functionality and operational convenience of the DC power distribution system, but also significantly improves its flexibility and maintainability in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the front three-dimensional structure of a DC power distribution power supply frame of the utility model in a preferred embodiment;

[0026] Figure 2 It is a schematic diagram of the rear three-dimensional structure of a DC power distribution power supply frame of the utility model in a preferred embodiment;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the DC output terminal bracket and the DC output terminal of the utility model in a preferred embodiment;

[0028] Figure 4 It is a schematic diagram of the front three-dimensional structure of the DC power distribution power supply frame of the utility model after removing the upper cover;

[0029] Figure 5 It is a schematic diagram of the rear three-dimensional structure of the DC power distribution power supply frame of the utility model after removing the upper cover;

[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of a connector of the utility model in a preferred embodiment;

[0031] Figure 7 It is a three-dimensional structural schematic diagram of the connector of the utility model from another angle;

[0032] Figure 8 This is a schematic diagram of the connection state of the connector of the utility model in a preferred embodiment;

[0033] Fig. 9 A schematic diagram of a connection state of the connector of the utility model from another angle;

[0034] Fig.10 It is a schematic diagram of the rear three-dimensional structure of the bottom branch copper bar, the top branch copper bar and the branch copper bar bracket of the utility model;

[0035] Fig.11It is a schematic diagram of the front three-dimensional structure of the bottom branch copper bar, the top branch copper bar and the branch copper bar bracket of the utility model;

[0036] Fig.12 It is a schematic diagram of the three-dimensional structure of the branch copper busbar support, the bottom branch copper busbar and the top branch copper busbar of the utility model in a preferred embodiment;

[0037] Fig.13 It is a schematic diagram of the three-dimensional structure of the negative copper bar assembly of the utility model in a preferred embodiment;

[0038] Fig.14 It is a schematic diagram of the three-dimensional structure of the utility model after the tray is pulled out.

[0039] Reference numerals include:

[0040] 100—housing 110—upper cover 120—bottom shell

[0041] 130—branch copper bar bracket 131—long hole 132—copper bar slot

[0042] 133—Fixing hole 140—Tray 150—Cable bracket

[0043] 160—cable channel 170—DC output terminal bracket 171—mounting hole

[0044] 180—Guide limit slot 200—DC cable 300—Positive copper busbar assembly

[0045] 310—first positive copper bar 320—second positive copper bar 400—negative copper bar assembly

[0046] 410—Contactor 420—Shunter 430—Bottom branch copper bar

[0047] 431—bottom adapter hole 440—top branch copper bar 441—top adapter hole

[0048] 442—sliding hole 450—first negative copper bar 460—second negative copper bar

[0049] 600—DC output terminal 610—second positive electrode 620—second negative electrode

[0050] 630 - buckle 700 - connector 710 - first positive electrode

[0051] 720—First negative electrode DETAILED DESCRIPTION

[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0054] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] Please refer to Figure 1-Figure 3 , Figure 6 and Figure 7 , which is a preferred embodiment of the utility model, the DC power distribution power supply frame includes: a shell 100; a connector 700, which is installed at the rear of the shell 100 and is provided with a first positive electrode 710 and a first negative electrode 720; a DC cable 200, which is arranged in the shell 100, extends from the front of the shell 100 to the connector 700, and is connected with the first positive electrode 710 and the first negative electrode 720; a DC output terminal 600, which is installed at the front of the shell 100 and is provided with a second positive electrode 610 and a second negative electrode 620; a positive copper busbar assembly 300, which is installed in the shell 100, and its two ends are respectively connected with the first positive electrode 710 and the second positive electrode 610; a negative copper busbar assembly 400, which is also installed in the shell 100, and its two ends are respectively connected with the first negative electrode 720 and the second negative electrode 620.

[0057] Compared with the output cable outlet method of the conventional bullet-shaped circuit breaker distribution system, the utility model adopts a circuit breaker (preferably a bullet-shaped circuit breaker) in conjunction with the use of a DC output terminal 600, so that the DC positive and negative output cables are outlet from the front of the housing 100, effectively avoiding occupying the internal space of the housing 100, which not only provides a larger operating space for cable installation, but also greatly facilitates the customer's installation, management and maintenance of the output cables, making the configuration of the output cables to the equipment load more flexible. The utility model not only improves the functionality and operational convenience of the DC power distribution system, but also significantly improves its flexibility and maintainability in practical applications. The following is a further detailed introduction to each of the above components.

[0058] like Figure 1-Figure 4 As shown, the housing 100 includes an upper cover 110 and a bottom housing 120 that are buckled together. A cable bracket 150 and a DC output terminal bracket 170 are fixedly disposed at the front of the bottom housing 120. The cable bracket 150 is used to fix and install the DC cable 200. Figure 3 As shown, the DC output terminal bracket 170 is used to install one or more DC output terminals 600. The DC output terminal bracket 170 is provided with a plurality of mounting holes 171 for mounting the DC output terminals 600. The DC output terminal 600 is provided with a buckle 630, and the DC output terminal 600 is detachably mounted in the mounting hole 171 through the buckle 630.

[0059] like Figure 4 As shown, the housing 100 is further provided with a cable channel 160 for accommodating the DC cable 200. The cable channel 160 is in the shape of a long strip, and its two ends are respectively connected to the cable bracket 150 and the rear of the housing 100. The DC cable 200 passes through the cable bracket 150 and is then connected to the connector 700 through the cable channel 160. The DC power distribution power supply frame of the utility model can connect the DC cable 200 from the front to the connector 700 at the rear through the separately isolated cable channel 160, which is convenient for customers to manage cables.

[0060] like Figure 5 As shown, the connector 700 is mounted at the rear of the housing 100. Figure 6 and Figure 7 As shown, the connector 700 is provided with a first positive electrode 710 and a first negative electrode 720. Figure 3 The DC output terminal 600 is installed at the front of the housing 100 and is provided with a second positive electrode 610 and a second negative electrode 620. Figure 5 , Figure 8 and Fig. 9As shown, the first positive electrode 710 and the second positive electrode 610 are connected together through the positive electrode copper bar assembly 300; the first negative electrode 720 and the second negative electrode 620 are connected together through the negative electrode copper bar assembly 400.

[0061] like Figure 5 , Figure 8 and Fig. 9 As shown, the positive copper bar assembly 300 includes a first positive copper bar 310 and a second positive copper bar 320 connected together. Specifically, the first positive copper bar 310 is arranged at the front of the shell 100 and extends in the width direction of the shell 100. The first positive copper bar 310 is connected to the second positive pole 610 of the plurality of DC output terminals 600, and one end thereof is connected to the second positive copper bar 320. The second positive copper bar 320 extends in the depth direction of the shell 100, one end of the second positive copper bar 320 is connected to the first positive copper bar 310, and the other end is connected to the first positive pole 710 of the connector 700. The positive copper bar assembly 300 is connected to the second positive pole 610 of the DC output terminal 600 from the other side of the connector 700, and the positive DC current output is realized.

[0062] In traditional DC power distribution systems, the positive output cable usually needs to be installed with a separate positive copper busbar and come out from the top of the frame, which not only complicates the installation and maintenance of the cable, but also takes up valuable space inside the cabinet. However, this solution uses a 1RU bullet circuit breaker in conjunction with the front-outlet DC output terminal 600 to achieve the DC positive output cable coming out from the front of the frame, effectively avoiding the occupation of space inside the cabinet. This innovative outlet method not only provides a larger operating space for cable installation, but also greatly facilitates customers' installation, management and maintenance of output cables, making the process of configuring cables to equipment loads more flexible and efficient. The utility model not only improves the functionality and operational convenience of the DC power distribution system, but also significantly improves its flexibility and maintainability in practical applications.

[0063] like Figure 5 , Figure 8 and Fig. 9 As shown, in one embodiment of the present application, the negative copper bar assembly 400 includes a first negative copper bar 450 and a second negative copper bar 460 connected together. One end of the first negative copper bar 450 is connected to the second negative electrode 620 of the DC output terminal 600, and the other end is indirectly connected to the second negative copper bar 460. One end of the second negative copper bar 460 is indirectly connected to the first negative copper bar 450, and the other end is connected to the first negative electrode 720.

[0064] like Figure 5 , Figure 10-12 As shown, the negative electrode copper bar assembly 400 further includes a bottom branch copper bar 430 and a top branch copper bar 440. Figure 5 and Fig.10 As shown, one end of the bottom branch copper bar 430 is provided with a bottom adapter hole 431 for connecting with the circuit breaker, and the other end is connected with the second negative copper bar 460. Figure 5 and Fig.11 As shown, one end of the top branch copper bar 440 is connected to the first negative copper bar 450, and the other end is provided with a top adapter hole 441 for connecting with the circuit breaker. When the bullet-shaped circuit breaker is inserted into the top adapter hole 441 and the bottom adapter hole 431, the negative current conduction is completed. The number of the bottom branch copper bar 430 and the top branch copper bar 440 can be multiple, for example, five, which can provide five groups of independent DC output branches, each branch provides three groups of DC current output, which can meet diversified needs.

[0065] like Fig.12 As shown, a branch copper bar bracket 130 is fixedly provided in the middle of the bottom shell 120, which is used to fix and install the bottom branch copper bar 430 and the top branch copper bar 440. The branch copper bar bracket 130 is fixedly installed in the shell 100. The bottom branch copper bar 430 is fixedly installed at the bottom of the branch copper bar bracket 130. Specifically, as shown in FIG. Fig.10 As shown, a long hole 131 is provided at the bottom of the branch copper bar bracket 130, and the bottom branch copper bar 430 passes through the long hole 131, is supported by the bottom of the branch copper bar bracket 130, and is fixed to the branch copper bar bracket 130 with fasteners such as screws.

[0066] like Fig.11 and Fig.12 As shown, the top branch copper bar 440 is movably mounted on the top of the branch copper bar bracket 130. Specifically, a copper bar slot 132 is provided on the top of the branch copper bar bracket 130, and the top branch copper bar 440 is inserted into the copper bar slot 132 of the branch copper bar bracket 130. A fixing hole 133 is also provided on the branch copper bar bracket 130, and a sliding hole 442 is also provided on the top branch copper bar 440. The top branch copper bar 440 is fixed by fasteners such as pins passing through the sliding hole 442 and the fixing hole 133. The diameter of the sliding hole 442 is larger than the diameter of fasteners such as pins, and the top branch copper bar 440 is in an incompletely fixed state, with an up and down floating margin. The top branch copper bar 440 can be movably mounted on the top of the branch copper bar bracket 130, so that the bullet-shaped circuit breaker can be inserted into the bottom adapter hole 431 and the top adapter hole 441 to realize the conduction of the negative current.

[0067] like Figure 5 and Fig.13 As shown, in one embodiment of the present application, the negative copper bar assembly 400 further includes a contactor 410. One end of the contactor 410 is connected to the bottom branch copper bar 430, and the other end is connected to the second negative copper bar 460.

[0068] like Figure 5 and Fig.13 As shown, in another embodiment of the present application, the negative copper bar assembly 400 further includes a shunt 420. The shunt 420 is disposed between the contactor 410 and the second negative copper bar 460, one end of which is connected to the contactor 410, and the other end of which is connected to the second negative copper bar 460.

[0069] like Figure 5 and Fig.13 As shown, the negative current first connects to the shunt 420, the contactor 410, the bottom branch copper bar 430 and the top branch copper bar 440 through the second negative copper bar 460, and finally connects to the second negative pole 620 of the DC output terminal 600 through the first negative copper bar 450, so as to realize the output of negative DC current. In the conventional bullet power distribution system, the DC negative output usually connects the negative cable to the top branch copper bar and outputs the cable from the top of the plug-in frame, which is not easy to operate when installing and maintaining the cable, and occupies the internal space of the cabinet. Different from the output cable output method of the conventional bullet power distribution system, this solution uses a 1RU bullet circuit breaker in conjunction with the use of the DC output terminal 600. One end of the first negative copper bar 450 is fixedly connected to the top branch copper bar 440, and the other end is connected to the second negative pole 620 of the DC output terminal 600, so that the DC negative output cable can be output from the front of the plug-in frame without occupying the cabinet space. The cable installation operation space is large, which is convenient for customers to install, manage and maintain the output cable, and flexibly configure the output cable to the equipment load.

[0070] like Fig.14 As shown, the DC power distribution power supply frame also includes a tray 140 for installing fragile or critical components. The tray 140 is slidably installed on the front of the shell 100. Specifically, a guide limit slot 180 is provided on the shell 100, and the tray 140 is slidably set in the guide limit slot 180. The tray 140 is set on the right side of the frame, and the tray 140 is inserted into the bottom shell 120 along the guide limit slot 180 and is locked and fixed by fasteners such as screws. By releasing the fixing screws on the front of the tray 140, it can be pulled out and the fragile or critical components fixed on it can be maintained.

[0071] like Figure 1As shown, the DC input cable passes through the cable bracket 150 from the left side of the plug-in frame and is connected to the first positive pole 710 and the first negative pole 720 of the DC input connector 700 on the back of the plug-in frame. The positive copper bar assembly 300 and the negative copper bar assembly 400 are connected to the other side of the connector 700. The current is connected to the second positive pole 610 and the second negative pole 620 of the DC output terminal 600 through the positive copper bar assembly 300 and the negative copper bar assembly 400, wherein the positive current is directly connected to the second positive pole 610 of the DC output terminal 600 through the positive copper bar assembly 300 to realize positive current output; the negative current is connected to the contactor 410, the shunt 420, the bottom branch copper bar 430 and the top branch copper bar 440 through the negative copper bar assembly 400, and finally connected to the second negative pole 620 of the DC output terminal 600 to realize negative current output. The bottom branch copper bar 430 and the top branch copper bar 440 are provided with a bottom adapting hole 431 and a top adapting hole 441. When the bullet-shaped circuit breaker is inserted into the bottom adapting hole 431 and the top adapting hole 441, the negative current conduction is completed.

[0072] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. A DC power distribution power supply frame, characterized in that: include: Housing (100); A connector (700) is installed at the rear of the housing (100) and is provided with a first positive electrode (710) and a first negative electrode (720); A DC cable (200) is arranged in the housing (100), extends from the front of the housing (100) to the connector (700), and is connected to the first positive electrode (710) and the first negative electrode (720); A DC output terminal (600) is installed at the front of the housing (100) and is provided with a second positive electrode (610) and a second negative electrode (620); A positive copper bar assembly (300) is installed in the housing (100), and two ends thereof are respectively connected to the first positive electrode (710) and the second positive electrode (610); The negative electrode copper bar assembly (400) is also installed in the housing (100), and its two ends are respectively connected to the first negative electrode (720) and the second negative electrode (620).

2. The DC power distribution power supply frame according to claim 1, characterized in that: It also includes a cable bracket (150) for fixing the DC cable (200), and the cable bracket (150) is arranged at the front of the housing (100).

3. The DC power distribution power supply frame according to claim 2, characterized in that: It also includes a cable channel (160) for accommodating the DC cable (200); the cable channel (160) is arranged in the housing (100), and two ends of the cable channel (160) are respectively connected to the cable bracket (150) and the rear of the housing (100).

4. The DC power distribution power supply frame according to claim 1, characterized in that: The positive copper bar assembly (300) comprises a first positive copper bar (310) and a second positive copper bar (320) connected together; the first positive copper bar (310) is arranged at the front of the housing (100), extends along the width direction of the housing (100), and is connected to the second positive electrode (610) and the second positive copper bar (320); one end of the second positive copper bar (320) is connected to the first positive copper bar (310), and the other end is connected to the first positive electrode (710).

5. The DC power distribution power supply frame according to claim 1, characterized in that: The negative copper bar assembly (400) comprises a first negative copper bar (450) and a second negative copper bar (460) connected together, wherein the first negative copper bar (450) is connected to the second negative electrode (620) and the second negative copper bar (460); one end of the second negative copper bar (460) is connected to the first negative copper bar (450), and the other end is connected to the first negative electrode (720).

6. The DC power distribution power supply frame according to claim 5, characterized in that: The negative copper bar assembly (400) further comprises a bottom branch copper bar (430) and a top branch copper bar (440); one end of the top branch copper bar (440) is connected to the first negative copper bar (450), and the other end is provided with a top adapter hole (441) for connecting to a circuit breaker; one end of the bottom branch copper bar (430) is provided with a bottom adapter hole (431) for connecting to a circuit breaker, and the other end is connected to the second negative copper bar (460).

7. The DC power distribution power supply frame according to claim 6, characterized in that: The negative copper bar assembly (400) further comprises a branch copper bar bracket (130), wherein the branch copper bar bracket (130) is fixedly mounted in the housing (100), the bottom branch copper bar (430) is fixedly mounted at the bottom of the branch copper bar bracket (130), and the top branch copper bar (440) is movably mounted at the top of the branch copper bar bracket (130).

8. The DC power distribution power supply frame according to claim 6, characterized in that: The negative electrode copper busbar assembly (400) further comprises a contactor (410), one end of the contactor (410) being connected to the bottom branch copper busbar (430), and the other end of the contactor (410) being connected to the second negative electrode copper busbar (460).

9. The DC power distribution power supply frame according to claim 8, characterized in that: The negative copper busbar assembly (400) further comprises a shunt (420), which is arranged between the contactor (410) and the second negative copper busbar (460), one end of which is connected to the contactor (410), and the other end of which is connected to the second negative copper busbar (460).

10. The DC power distribution power supply frame according to any one of claims 1 to 9, characterized in that: It also includes a tray (140) for mounting components, and the tray (140) is slidably mounted on the front of the housing (100).

11. The DC power distribution power supply frame according to claim 10, characterized in that: The housing (100) is provided with a guide limit slot (180), and the tray (140) is slidably disposed in the guide limit slot (180).

12. The DC power distribution power supply frame according to any one of claims 1 to 9, characterized in that: It also includes a DC output terminal bracket (170), wherein the DC output terminal bracket (170) is mounted on the front of the housing (100), and the DC output terminal (600) is mounted on the DC output terminal bracket (170).

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