CN204615436U - An uninterruptible power supply cabinet - Google Patents

Abstract

The utility model discloses a kind of non intermittented power source machine cabinet, comprise the framework, door-plate, inner structural members, module and the element that form machine cabinet body, the inner space of described rack becomes multiple installation chamber for installation module, element and control circuit board by baffle for separating, described installation chamber comprise set gradually from top to bottom front lower portion component cavity, front middle part component cavity, upper element chamber, crown member chamber and with described front lower portion component cavity, front middle part component cavity before and after the rear lower component cavity that is arranged side by side; Described dividing plate offers the through hole for connecting up; Described rear lower component cavity and upper element chamber be provided with independently heat dissipation wind channel and be equipped independently fan realize heat radiation; The utility model achieves reasonable, the compact layout of interior of equipment cabinet power component and control circuit board and succinctly orderly electrical connection, reduces the overall physical dimensions of rack thus brings the decline of cost, and making the wiring of cable more succinct and smooth.

Description

An uninterruptible power supply cabinet

technical field

The utility model relates to an uninterruptible power supply cabinet, in particular to an internal structure composition of the uninterruptible power supply cabinet.

Background technique

The uninterruptible power supply cabinet designed based on the existing technology has low internal space utilization rate, large volume, life limit and vulnerable components (such as capacitors, control circuit boards, fans, power modules, etc.) The cable wiring is messy, the control circuit board and the components bearing high voltage are mostly located in the air duct and are easily affected by dust accumulation, which leads to an increase in the probability of failures such as short circuit, arcing, and component corrosion. These shortcomings make the current uninterruptible power supply cabinet bulky, Poor reliability and maintainability, high cost.

Utility model content

The purpose of this utility model is to propose an uninterruptible power supply cabinet which reduces the size of the uninterruptible power supply, reduces the cost and improves the reliability and maintainability by optimizing the structural layout of the internal components of the cabinet.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: an uninterruptible power supply cabinet, including a frame, a door panel, internal structural parts, modules and components constituting the main body of the cabinet. There are two installation chambers for installing modules, components and control circuit boards, the installation chambers include the front lower component cavity, the front middle component cavity, the middle upper component cavity, the top component cavity and all the components arranged sequentially from bottom to top. The front lower component cavity, the front middle component cavity and the rear lower component cavity are arranged side by side; the partition plate is provided with through holes for wiring.

In the utility model, a bus bar for realizing the electrical connection between the power element and the control circuit board is arranged between the front lower element chamber, the rear lower element chamber and the middle upper element chamber; the rear lower element chamber and the middle upper element The chamber is equipped with an independent heat dissipation air duct and is equipped with an independent fan to realize heat dissipation.

In the utility model, the front lower component cavity is provided with an uninterruptible power supply main circuit input switch, a bypass input switch, an output switch, a battery switch, a battery fuse and its mounting fixture, a user terminal block, and a lightning protection component , input electromagnetic compatibility circuit board and output electromagnetic compatibility circuit board; said front lower element cavity is also provided with a maintenance bypass switch and said maintenance bypass switch is installed on the front of said partition through a guide rail; said maintenance bypass switch is A maintenance bypass switch lock is provided, and the maintenance bypass switch lock points to and withstands the operating handle of the maintenance bypass switch when the uninterruptible power supply is in normal operation, which can effectively prevent accidents caused by personnel misoperation of the maintenance bypass switch. Uninterruptible power supply failure accident.

In the utility model, a first wire hole and a second wire hole for wiring are arranged on the partition, and a lightning protection component, an input EMC circuit board and an output EMC circuit board are installed on the back of the partition.

In the utility model, the lower part of the front lower element cavity is provided with a user distribution board for guiding and separating the AC input cable, battery input cable and AC output cable connected by the user, and a user distribution board for fixing the user distribution board. The user line inlet board; the user line inlet board is provided with a wire inlet hole, and the user line distribution board is provided with at least two wire inlet holes, and the wire inlet holes are equipped with wire protection sleeves.

In the present utility model, the front middle element cavity is provided with an output filter capacitor, a battery contactor and a parallel control circuit board, and a first tray for installing the output filter capacitor, battery contactor and parallel control circuit board; the A metal protective cover for electromagnetic shielding of the parallel control circuit board is arranged on the first tray.

In the present utility model, the rear lower component cavity includes a rectification reactor and an output transformer, and the rectification reactor is electrically connected to the main circuit input switch and the rectification thyristor module respectively, and the output transformer is respectively connected to the inverter IGBT module, the inverter The variable output thyristor power module and the output filter capacitor are electrically connected; there are partitions between the rear lower element chamber, the upper middle element chamber and the front lower element chamber; the first cooling fan group is arranged at the lower part of the rear lower element chamber , the upper part of the rear lower element chamber is provided with a second cooling fan group, and one group of fan groups is in the form of air suction, and the other group of fan groups is in the form of air intake, thereby forming forced heat dissipation in the rear lower element chamber Airflow for cooling.

In the present invention, an air inlet for dissipating heat from the rear lower element chamber is provided on the partition between the rear lower element chamber and the front lower element chamber.

In the utility model, the upper and middle element chambers are provided with a rectifier thyristor power module, a static switch thyristor power module, an inverter IGBT power module, a DC bus capacitor, a current detection circuit board, a drive circuit board and an absorption circuit board and fixed on The U-shaped guide rail groove on the frame, the rectifier thyristor power module, the static switch thyristor power module and the inverter IGBT power module are installed on the second tray, and the second tray is fixed in the U-shaped guide rail groove;

The rectifier thyristor power module is electrically connected to the rectifier reactor and the DC bus capacitor through the busbar and the cable; the static switch thyristor power module is electrically connected to the output transformer, the bypass input switch and the system output switch through the busbar and the cable respectively ; The IGBT snubber circuit board mounted on the inverter IGBT power module is electrically connected to the DC bus capacitor;

The upper and middle element chambers are also provided with a radiator for cooling the rectifier thyristor power module, static switch thyristor power module, and inverter IGBT power module, a heat dissipation air duct structure and a third heat dissipation fan group, and the rectifier thyristor power module, static switch thyristor power module and inverter IGBT power module are installed on the radiator, one end of the heat dissipation air duct structure is connected with the radiator and forms a whole with the radiator, and the heat dissipation air The other end of the duct structure is connected to the third heat dissipation fan group, the third heat dissipation fan group is arranged on the door panel, and the current detection circuit board is installed on both sides of the heat dissipation air duct structure.

In the utility model, the top element cavity is provided with a control box for installing a control circuit board, and the control box includes a top cover plate and a first control box tray and a second control box tray that can be disassembled separately.

In the utility model, the control box is provided with ventilation holes for realizing natural convection heat dissipation of the control circuit board.

The utility model divides the internal space of the uninterruptible power supply cabinet into a plurality of installation chambers for installing components and control circuit boards by using partitions, optimizes the space layout inside the cabinet, and realizes the power components and control circuit boards in the cabinet. Reasonable, compact layout and simple and orderly electrical connection reduce the overall size of the cabinet, thereby reducing the cost, and make the internal wiring of the cabinet more concise and smooth, and also enhance the power module components, capacitor components and control circuits. The maintainability of the board and the anti-interference ability and environmental adaptability of the control circuit board are improved.

Description of drawings

Fig. 1 is a schematic diagram of the front structure of the uninterruptible power supply cabinet in an embodiment of the present invention;

Fig. 2 is a side structural schematic diagram 1 of the uninterruptible power supply cabinet in an embodiment of the present invention;

Fig. 3 is a schematic diagram of the front structure of the front lower component cavity in an embodiment of the present invention;

Fig. 4 is a schematic diagram of the back structure of the front lower element cavity in an embodiment of the present invention;

Fig. 5 is the second schematic diagram of the side structure of the uninterruptible power supply cabinet in an embodiment of the present invention;

Fig. 6 is a schematic diagram of the installation position of the cooling fan group in an embodiment of the present invention;

Fig. 7 is a schematic structural view of the front middle element cavity in an embodiment of the present invention;

Fig. 8 is a schematic diagram of the side structure of the middle and upper element cavity in an embodiment of the present invention;

Fig. 9 is the second schematic diagram of the side structure of the middle and upper element chamber in an embodiment of the present invention;

Fig. 10 is a structural schematic diagram 1 of the top element cavity in an embodiment of the present invention;

Fig. 11 is a second structural schematic diagram of the top element cavity in an embodiment of the present invention.

Detailed ways

In order to illustrate the technical solution of the utility model more clearly, the technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the following descriptions are only some embodiments of the utility model. For those skilled in the art, other embodiments can also be obtained according to these embodiments without paying creative efforts.

Referring to the accompanying drawings, an uninterruptible power supply cabinet includes a frame 5 and a door panel 7 constituting the main body of the cabinet. The internal space of the cabinet is divided into a plurality of installation chambers for installing components and control circuit boards 405 by partitions 106. Referring to the figure 1 and Figure 2, the installation chamber includes the front lower element chamber 1, the front middle element chamber 2, the upper middle element chamber 3, the top element chamber 4, and the front lower element chamber 1, the front middle element chamber, which are arranged sequentially from bottom to top 2 rear and lower component chambers 6 arranged side by side; the partition plate 106 is provided with through holes for wiring. Preferably, a busbar for realizing the electrical connection between the modules, components and the control circuit board 405 is arranged between the front lower component cavity 1, the rear lower component cavity 6 and the middle and upper component cavity 3; the rear lower component cavity 6 and the middle and upper The element cavity 3 is provided with an independent heat dissipation air duct and equipped with an independent fan to realize heat dissipation.

Wherein, with reference to Fig. 3, the front lower component cavity 1 is used to place switches, fuses, user terminal blocks 108 and lightning protection and electromagnetic compatibility circuit boards; with reference to Fig. 7, the front middle component cavity 2 is used to place AC filter capacitor components and Parallel control circuit board 203 and battery contactor 201; with reference to Figure 5, the rear lower component cavity 6 is used to place the electromagnetic component module; with reference to Figure 8, the middle and upper component cavity 3 is used to place the power device module and the DC bus capacitor 306; FIG. 11 , the top component cavity 4 is used to place the system control circuit board 405 .

Specifically, referring to FIG. 3 , the front lower component chamber 1 is arranged on the front of the cabinet, and is mainly surrounded by a partition plate 106, a frame 5 and a door panel 7. The equipment installed in the front lower component chamber 1 mainly includes an uninterruptible power supply main circuit input switch, side road input switch, maintenance bypass switch 103, output switch, battery switch or battery fuse and its installation fixture, user terminal block 108, lightning protection component 112, input EMC circuit board 111 and output EMC circuit board 110 and Repair bypass switch lock 101. The above-mentioned switch is fixed on the front of the partition plate 106 of the front lower element chamber 1 through the guide rail 102 or specially designed parts. The maintenance bypass switch lock 101 is installed above the maintenance bypass switch 103. When the UPS is in normal operation, the maintenance bypass The switch lock 101 points to and withstands the operating handle of the maintenance bypass switch 103, which can effectively prevent uninterruptible power failure accidents caused by personnel misoperation of the maintenance bypass switch 103. Referring to FIG. 4 , the lightning protection component 112 , the input EMC circuit board 111 , and the output EMC circuit board 110 are placed on the back of the partition 106 . The first wire hole 105 and the second wire hole 107 on the upper part of the above-mentioned switch are located on the partition plate 106. The first wire hole 105 and the second wire hole 107 are specially used for switches, lightning protection components 112, EMC circuit board incoming and outgoing cable wiring, the above-mentioned electromagnetic components and related cables of the power module components and the lightning protection component 112 and the cables of the input EMC circuit board 111 and the output EMC circuit board 110 pass through the first wire hole 105 or The second wire passing hole 107 is connected with the wire inlet end of the above-mentioned switch. The cables at the outlet ends of the switch and the battery fuse are connected to the user connection terminal block 108 (row) located directly below the switch. In the utility model, the lightning protection component 112 and the electromagnetic compatibility circuit board are installed behind the partition 106, and are connected to the switch inlet terminal through the first wire hole 105 above the switch, so that many cables can be "invisible" on the partition The role of 106 makes the wiring in the cabinet simple and beautiful, and solves the problem of messy wiring on the front of the equipment because various single boards and lightning protection components 112 are placed on the same side of the switch in the prior art design. Referring to Fig. 3, on the dividing plate 106 directly below the user connection terminal block 108 (row), a user line inlet plate 104 and a user line breakout plate 109 are fixedly arranged, and the user line entry plate 104 is used to fix the above-mentioned user line breakout plate 109. There are two or more wire inlet holes on the above-mentioned user distribution board 109 and a wire cover is installed on the wire passing hole. The incoming board 104 is mainly used for separating the AC input cable, the battery input cable and the AC output cable connected by the user, so as to facilitate the internal wiring of the cabinet. In the utility model, the user inlet plate 104 is made of low-cost common sheet metal material (such as galvanized iron plate). Only one inlet hole is opened on the user inlet plate 104, and the purpose is to prevent the user's external cable from passing through two When there are two or more closed-type inlets, because the current around the inlet holes causes eddy current effects in the closed sheet metal material between the inlet holes, resulting in unnecessary heat generation and energy loss. The user distribution board 109 is made of non-magnetic materials (such as aluminum board or epoxy board, bakelite board, etc.). The utility model has the advantage that when more than two wire inlet holes need to be designed, in order to avoid the eddy current heating effect caused by the circulation between the wire inlet holes in the closed magnetic conductive sheet metal material, the conventional design is set in the user's The multiple wire inlet holes on the wire board 104 are transferred to the non-magnetic user distribution board 109. Through this design, the cost increase caused by the use of non-magnetic materials for the user wire inlet board 104 can be avoided, and the user can also avoid The mechanical strength of the user inlet board 104 is reduced due to the opening of multiple non-closed wire inlet holes in the wire inlet board 104 , while taking into account the cost, mechanical strength and line distribution function of the user wire inlet board 104 .

5 and 7, the front middle element chamber 2 is arranged above the front lower element chamber 1, and the uninterruptible power supply output filter capacitor 202, battery contactor 201 and parallel control circuit board 203 are mainly installed in the front middle element chamber 2, The output filter capacitor 202 is electrically connected to the output transformer 601 installed in the rear lower component chamber 6 through cables or busbars. Referring to FIG. 5 , because the distance to the output transformer 601 is short, the cable connection is simple and convenient, and the high-frequency current loop is short, which helps to improve the electromagnetic compatibility performance of the uninterruptible power supply. The front middle component cavity 2 is provided with a first tray 205 for installing the output filter capacitor 202, the battery contactor 201 and the parallel control circuit board 203, and the above output filter capacitor 202, the battery contactor 201 and the parallel control circuit board 203 Fixing on the first pallet 205 forms a modular assembly, which realizes the modular assembly of the assembly before the final assembly of the whole machine. This design simplifies the assembly and improves the production efficiency. Referring to Fig. 7, the first tray 205 in the front middle component cavity 2 is equipped with a metal protective cover 204 for forming electromagnetic shielding to the parallel control circuit board 203, so that the above parallel control circuit board 203 is installed on a separately designed metal The protective cover 204 is electromagnetically shielded from the electromagnetic elements installed in the middle and upper element cavity 3, which is beneficial to improve the reliability of the uninterruptible power supply. Among the components in the above-mentioned front middle component chamber 2, the output filter capacitor 202 is a life-span component, which needs regular maintenance and replacement, and the parallel control circuit board 203 needs to be operated and connected to the parallel signal cable at the operating site. The utility model places these components in In the front middle component chamber 2, only need to open the front inner door of the upper middle part component chamber 3, just can carry out the front maintenance to these components, greatly improves the convenience of maintenance.

Referring to Fig. 5, the rear lower element chamber 6 is arranged side by side with the front lower element chamber 1 and the front middle element chamber 2, and the rear lower element chamber 6 is mainly used for installing and placing the electromagnetic elements of the uninterruptible power supply, including the rectifying reactor 602 and the output transformer 601, the rectifier reactor 602 is electrically connected to the main circuit input switch of the front lower element chamber 1 and the rectifier thyristor module of the middle and upper element chamber 3, and the output transformer 601 is connected to the inverter IGBT module and the inverter output thyristor of the middle and upper element chamber 3 The power module is electrically connected to the output filter capacitor 202 of the front middle element cavity 2 . There are partitions 106 between the rear lower element chamber 6 where the rectifier reactor 602 and the output transformer 601 are located, the upper middle element chamber 3 and the front lower element chamber 1 of the cabinet, so that the air duct is relatively closed and independent. Referring to FIG. 6 , the electromagnetic elements in the rear lower element cavity 6 are dissipated through the first cooling fan group 604 arranged at the bottom of the rear lower element cavity 6 and the second cooling fan group 605 arranged at the upper part of the rear lower element cavity 6 , and, One group of fan groups is in the form of air suction, and the other group of fan groups is in the form of air intake, thereby forming a forced heat dissipation airflow in the rear lower element cavity 6 to dissipate heat; The hot air in the lower element cavity 6 is taken out of the cabinet, and the first heat dissipation fan group 604 adopts the mode of blowing into the cabinet to provide cold air for the heat dissipation of the electromagnetic components; The cooling fan group 605 uses air blowing to dissipate heat from the rear lower element cavity 6 . Referring to Fig. 5, there is a certain gap between the partition plate 106 between the rear lower element chamber 6 and the front lower element chamber 1, and the installation base plate of the rectifier reactor 602 and the output transformer 601 as the heat dissipation of the electromagnetic elements in the rear lower element chamber 6. An air inlet 603 , the air inlet 603 mainly provides a cold air channel for the heat dissipation of the rectifier reactor 602 . Referring to Fig. 4, at the same time, the first tray 205 of the front middle element chamber 2 is fully close to the coil of the output transformer 601 under the premise of meeting the requirements of the safety regulations in the utility model, so as to realize the purpose of providing an air duct for the heat dissipation of the coil of the output transformer 601. It can avoid that the cold air sent from the inlet at the bottom of the cabinet bypasses the heat dissipation air passage of the coil of the output transformer 601 and affects the heat dissipation effect. In the utility model, the design of the heat dissipation air passage for the electromagnetic element in the lower element chamber 6 of the cabinet is clearly designed, and the use of the fan is unique. Compared with the prior art, the utility model has the advantages of compact structure and high heat dissipation efficiency.

Referring to Fig. 8 and Fig. 9, the middle and upper element cavity 3 mainly houses the power module components of the uninterruptible power supply, including the rectifier thyristor power module 301, the static switch thyristor power module 312, the inverter IGBT power module 307, the DC bus capacitor 306, and the radiator 304, the heat dissipation air duct structural member 302, the current detection circuit board, the drive circuit board and the absorption circuit board 313 of the above-mentioned power module. The rectifying thyristor power module 301 is electrically connected to the rectifying reactor 602 and the DC bus capacitor 306 through bus bars and cables. The static switch thyristor power module 312 is electrically connected to the output transformer 601 , the bypass input switch, and the system output switch through busbars and cables. The IGBT snubber circuit board press-fitted on the inverter IGBT power module 307 is electrically connected to the DC bus capacitor 306 . All the power modules in the middle and upper element cavity 3 are installed on the radiator 304, and the radiator 304 is finally installed together with the cooling air duct structure 302 of the power module to form a whole. Referring to Fig. 6 and Fig. 10, a third heat dissipation fan group 314 is installed on the position corresponding to the cabinet door panel 7 and the heat dissipation air duct structural member 302, and the fans of the third heat dissipation fan group 314 adopt the form of drafting, and the third heat dissipation fan group 314 and the cooling air duct structure 302 are separate structures, that is, all power modules share the third cooling fan group 314, and since the third cooling fan group 314 is composed of multiple fans, the stability of the system is high. Referring to Fig. 7, the driving circuit board and absorbing circuit board 313 of the power module are installed on the vertical mounting surface at the rear end of the heat dissipation air duct structure 302, and a plurality of current detection circuit boards are installed on both sides of the heat dissipation air duct structure 302 respectively. The bus capacitor 306 is installed directly in front of the radiator 304 .

The above-mentioned power module components adopt modular design, integrating functions such as power conversion, driving, absorption, and signal detection, with compact structure layout and small footprint; The former modularization is produced separately, which reduces the workload of the final assembly and improves the production efficiency. Referring to FIG. 7 , the above-mentioned power components are finally integrally installed on a specially designed second tray 308 to form a whole. The second tray 308 is fixed in the specially designed U-shaped guide rail groove 309. When the whole machine is assembled, it is only necessary to align the second tray 308 with the entrance of the U-shaped guide rail groove 309 in front of the cabinet, then push it in and place the second The tray 308 can be locked and fixed on the front column of the cabinet frame 5 . Because the power module assembly is relatively heavy, the utility model realizes the overall installation or disassembly of the power module assembly through the second tray 308, which greatly reduces the difficulty of assembling the power module assembly during production and maintenance. The above-mentioned power module assembly adopts the heat dissipation air duct structural part 302 to form an independent air duct and is forced to dissipate heat by the third heat dissipation fan group 314. The structures are separated from each other, that is, all power modules share the third cooling fan group 314 . The third cooling fan group 314 is composed of a plurality of cooling fans. When any fan in the third cooling fan group 314 fails, it will not cause some units in the entire power module assembly to completely lose the power conversion capability. The lower is only the reduction of the heat dissipation ventilation of the power module assembly, which limits the output capacity of the power module assembly, and the uninterruptible power supply can still run at a derated level, so that it will not stop completely due to the failure of a fan in the third cooling fan group 314 Operation, compared with the design of the prior art, the reliability of the utility model is higher. The third heat dissipation fan group 314 adopts the form of drafting, and the driving circuit board and absorbing circuit board 313 of the above-mentioned power module are all installed on the rear side of the air inlet 603 of the radiator 304, that is, they are not in the air duct, and there are many and dense components. The circuit boards are installed vertically, and the installation position and installation form of the driving circuit board and the absorbing circuit board 313 of the above-mentioned power module are helpful to eliminate the influence of dust accumulation in the air duct on the driving circuit board and the absorbing circuit board 313 of the above-mentioned power module. Impact, improving the environmental adaptability and reliability of uninterruptible power supply. The current detection circuit board in the above power module assembly is installed on both sides of the air duct structure, and the current detection circuit board includes the first current detection circuit board 303 installed on one side of the heat dissipation air duct structure 302 and the The second current detection circuit board 310 and the third current detection circuit board 311 on the other side of the component 302. Referring to Fig. 6, the rectifier thyristor power module 301 is connected to the rectifier reactor 602, and the cable passes through the current sensor on the first current detection circuit board 303, and the thyristor power module of the bypass and output static switch is connected to the bypass input switch and the system The cables of the output switches pass through the second current detection circuit board 310 and the third current detection circuit board 311 respectively, the design and layout of the three current detection circuit boards play the role of fixed current sensors, and also pass through the three current sensor boards at the same time. Fixing indirectly limits the range of motion of the power cables, making the wiring of the power cables more concentrated, concise and smooth, and solving the problems of irregular fixing of current sensors and messy wiring of power cables in the prior art. The DC bus capacitor 306 in the above power module assembly is installed directly in front of the radiator 304 and close to the front end of the tray. Since the DC bus capacitor 306 is a life-limited component, it needs regular maintenance and replacement. The utility model relates to the DC bus capacitor 306 The layout can realize front maintenance when opening the inner door of the upper component chamber 3 in the cabinet, so that the maintainability is greatly improved.

10 and 11 , the top component cavity 4 is provided with a control box for installing a control circuit board 405 , the control box includes a top cover plate 403 and a first control box tray 401 and a second control box tray 402 that can be disassembled separately. The control box is a closed space surrounded by the top cover plate 403, the first control box tray 401, the second control box tray 402 and the surrounding cabinet frame 5, and various control circuit boards 405 of the uninterruptible power supply are collectively installed in the layout of the control box Make the wiring of the signal line more concentrated. Simultaneously, the control circuit board 405 is installed in a relatively closed metal space, so that the anti-electromagnetic interference capability of the control circuit board 405 is greatly improved. Preferably, the front and rear sides of the control box are provided with ventilation holes 404 for realizing natural convection heat dissipation of the control circuit board 405, which effectively controls and reduces the temperature rise of the control circuit board 405 and improves the reliability of the control circuit board 405. The control box consists of two parts, the first control box tray 401 and the second control box tray 402 arranged in front and back, and each part can be disassembled separately. The purpose of this split design is to remove the first control box tray 401 and/or the second The second control box tray 402 realizes maintenance and replacement of the power modules and related circuit boards in the power module assembly in the upper-middle component cavity 3 from the top of the cabinet. For example, the uninterruptible power supply in the prior art can only maintain the power module components from the side or the back. In actual installation, due to the limitation of external factors, multiple uninterruptible power supplies are usually installed side by side or close to the wall. , There is very little or no space left for rear maintenance and side maintenance. However, in the present utility model, the power module on the radiator 304 and the surrounding circuit boards can be maintained and replaced only by removing the second control box tray 402 of the control unit, which is extremely maintainable compared with the prior art. Big improvement.

The utility model divides the space structure of the uninterruptible power supply cabinet into five main equipment spaces, and optimizes the layout of the internal components of the uninterruptible power supply cabinet to solve the problem of low utilization rate of the internal space of the cabinet, large volume, main components and power. Module maintainability is poor, internal power cables and signal cables are messy, and the control circuit board 405 and components that bear high voltage are mostly located in the air duct, which is easily affected by dust accumulation, resulting in increased failure probability such as short circuit, arcing, and component corrosion. A series of problems, and the problems of uninterruptible power supply reliability, size, cost and maintainability caused by this series of problems. The structural features of the five element cavities in the utility model are summarized as follows,

Cabinet front lower component cavity 1

1. The lightning protection component 112, the input EMC circuit board 111 and the output EMC circuit board 110 are arranged on the back of the partition 106, and the design of two wire holes makes the layout of the cables hidden behind the partition 106, making the wiring simple and smooth , beautiful;

2. The maintenance bypass switch lock 101 is designed to prevent personnel from misoperating the maintenance bypass switch 103;

3. The separate design of the user inlet board 104 and the user outlet board 109, as well as the material selection of the user inlet board 104 and the user outlet board 109 can effectively prevent the heating problem caused by the eddy current effect, and also take into account the cost and the user Mechanical strength of the line inlet board 104 and the user distribution board 109 .

Component cavity 2 in the front middle of the cabinet

1. The layout of the output filter capacitor 202 makes the front maintenance very convenient, and the layout close to the output transformer 601 makes the output high-frequency current loop of the inverter short and the electromagnetic compatibility performance is good;

2. The design of the capacitor tray constructs the heat dissipation air passage of the output transformer 601, so as to prevent the cold wind from bypassing the heat dissipation air passage of the transformer coil and affecting the heat dissipation effect.

Cabinet rear lower component chamber 6

1. The first tray 205 is used to form an independent heat dissipation air duct for the output transformer 601 and the rectifier reactor 602; road.

Component cavity in the upper part of the cabinet 3

1. The modular design of the power module components makes the structure compact and occupies a small space. It can be produced separately before the final assembly of the whole machine, with high efficiency, reducing the difficulty and workload of final assembly, and improving production efficiency;

2. The design of the second tray 308 and U-shaped guide rail groove 309 makes it easy to install heavy power components;

3. The separate design of the third heat dissipation fan group 314 and the heat dissipation air duct structure 302 makes the third heat dissipation fan group 314 have a certain redundancy capability, even if one of the fans in the third heat dissipation fan group 314 fails, it will not cause uninterrupted The whole power supply stops running;

4. The exhaust design of the third cooling fan group 314 and the layout of each single board in the power module assembly behind the air inlet 603 of the radiator 304 can greatly reduce the impact of dust accumulation in the air duct on the circuit board

5. The front layout of the DC bus capacitor 306 makes the front maintenance easier;

6. The design and layout of the current detection circuit board makes the fixing of the current sensor more firm and regular, and the wiring of the power cable is more concentrated and smooth.

Cabinet Top Component Cavity 4

1. The centralized placement of the control circuit board 405 of the uninterruptible power supply makes the signal line wiring more concise and smooth, and the relatively closed metal control box enhances the anti-electromagnetic interference ability of the control circuit board 405;

2. The natural convection heat dissipation ventilation holes 404 opened at the front and back of the control box help to reduce the temperature rise of the control circuit board 405 inside the control box and enhance reliability;

3. The control box is divided into two parts, the first control box tray 401 and the second control box tray 402. The design realizes the maintenance of the power module and radiator 304 in the power module assembly from the top of the cabinet, which greatly improves the safety of the uninterruptible power supply cabinet. maintainability.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present utility model.

Claims (10)

1. a non intermittented power source machine cabinet, comprise the framework, door-plate, inner structural members, module and the element that form machine cabinet body, it is characterized in that, the inner space of described rack becomes multiple installation chamber for installation module, element and control circuit board by baffle for separating, described installation chamber comprise set gradually from top to bottom front lower portion component cavity, front middle part component cavity, upper element chamber, crown member chamber and with described front lower portion component cavity, front middle part component cavity before and after the rear lower component cavity that is arranged side by side; Described dividing plate offers the through hole for connecting up.

2. non intermittented power source machine cabinet as claimed in claim 1, it is characterized in that, described front lower portion component cavity is provided with main input switch, bypass input switch, output switch, cell switch, battery fuse and mounting fixing parts thereof, terminal block terminal base, lightning protection component, input electromagnetic compatibility circuit board and exports electromagnetic compatibility circuit board; Described front lower portion component cavity be also provided with maintenance bypass switch and described maintenance bypass switch by guide rails assembling in described membrane front face, described maintenance bypass switch is provided with maintenance bypass switch lock.

3. non intermittented power source machine cabinet as claimed in claim 2, is characterized in that, described dividing plate being provided with the first cable-through hole for connecting up and the second cable-through hole.

4. non intermittented power source machine cabinet as claimed in claim 1, it is characterized in that, the bottom of described front lower portion component cavity is provided with interchange input cable for guiding separate users to access, battery input cable and exchanges the subscriber branch line plate of output cable and the subscriber's drop plate for fixing described subscriber branch line plate; Described subscriber's drop plate offers an entrance hole, and described subscriber branch line plate offers at least two entrance holes, and described entrance hole is provided with wire bushing.

5. non intermittented power source machine cabinet as claimed in claim 1, described front middle part component cavity is provided with output filter capacitor, battery contactor, parallel operation control circuit board and the first pallet for installing output filter capacitor, battery contactor and parallel operation control circuit board; Described first pallet is provided with the protective cover for forming electromagnetic shielding to parallel operation control circuit board.

6. non intermittented power source machine cabinet as claimed in claim 1, it is characterized in that, described rear lower component cavity comprises commutating reactor and output transformer, described commutating reactor is electrically connected with main input switch and rectification thyristor module respectively, and described output transformer exports thyristor power model with inversion IGBT module, inversion respectively and output filter capacitor is electrically connected; All dividing plate is had between described rear lower component cavity and upper element chamber and front lower portion component cavity; The bottom of described rear lower component cavity is provided with the first radiator fan group, and the top of described rear lower component cavity is provided with the second radiator fan group, and wherein one group of fan group is Suction Form, and another group fan group is air intake form.

7. non intermittented power source machine cabinet as claimed in claim 1, is characterized in that, the dividing plate between described rear lower component cavity and front lower portion component cavity being provided with the air inlet for dispelling the heat for described rear lower component cavity.

8. non intermittented power source machine cabinet as claimed in claim 1, it is characterized in that, the U-shaped guide-track groove that described upper element chamber is provided with rectification thyristor power model, static switch thyristor power model, inversion IGBT power model, dc-link capacitance, current detection circuit plate, drive circuit board and absorbing circuit plate and is fixed on framework, described rectification thyristor power model, static switch thyristor power model and inversion IGBT power model are arranged on the second pallet, and this second pallet is fixed in described U-shaped guide-track groove;

Described rectification thyristor power model is electrically connected with commutating reactor and dc-link capacitance respectively by busbar and cable; Described static switch thyristor power model is electrically connected with output transformer, bypass input switch, system output switch respectively by busbar and cable; The IGBT absorbing circuit plate be fitted on inversion IGBT power model is electrically connected with dc-link capacitance;

Described upper element chamber be also provided with for give rectification thyristor power model, static switch thyristor power model, inversion IGBT power model carries out the radiator dispelled the heat, heat dissipation wind channel structure part and the 3rd radiator fan group, described rectification thyristor power model, static switch thyristor power model and inversion IGBT power model are arranged on described radiator, described heat dissipation wind channel structure part one end is connected with described radiator and forms an entirety with described radiator, the described heat dissipation wind channel structure part other end connects with the 3rd radiator fan group, described 3rd radiator fan group is arranged on described door-plate, described current detection circuit plate is arranged on the both sides of described heat dissipation wind channel structure part.

9. non intermittented power source machine cabinet as claimed in claim 1, it is characterized in that, described crown member chamber is provided with the control box for installing control circuit board, and described control box comprises lamina tecti and can the first control box pallet of dismounting and the second control box pallet separately.

10. non intermittented power source machine cabinet as claimed in claim 9, is characterized in that, described control box being provided with the ventilation hole for realizing control circuit board heat loss through convection.