No power outage device

Abstract

To provide an uninterruptible power source device which can cool power conversion modules with different output capacities at one time while suppressing change of the air amount to cool components other than the power conversion modules.SOLUTION: An uninterruptible power source device 100 includes a power conversion module 20, a reactor 52, and a housing 10. The housing 10 includes: a first section 10a in which plural types of power conversion modules 20 with different output capacities are arranged and the modules 20 can be cooled in common in such a manner that the first section is divided into sections so that flow passages of air from a fan 24 and a fan 25 are formed; and a second section 10b divided from the first section 10a, in which at least a reactor 52 is arranged and a flow passage of air from a fan 60 is formed.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an uninterruptible power supply device, and particularly to an uninterruptible power supply device that cools a power conversion unit.

Background Art

[0002] Conventionally, an uninterruptible power supply device that cools a power converter has been known (see, for example, Patent Document 1).

[0003] The uninterruptible power supply device described in Patent Document 1 has a power converter, a reactor, and a transformer. The inside of the cabinet body of the uninterruptible power supply device is partitioned into a front chamber and a rear chamber by a vertical partition wall. The power converter is housed in the front chamber. The reactor and the transformer are housed in the rear chamber. Further, the uninterruptible power supply device described in Patent Document 1 includes a cooling fan for the power converter and a cooling fan for the transformer. The cooling fan for the power converter exhausts the cooling air sucked into the air duct provided in the front chamber from the exhaust port provided on the top surface of the cabinet body. The cooling fan for the transformer exhausts the cooling air sucked into the rear chamber from the exhaust port provided on the top surface of the cabinet body. Further, in the uninterruptible power supply device described in Patent Document 1, an intake port is provided at the lower part of the door arranged on the front surface of the cabinet body. The air sucked in through this intake port is sucked into the front chamber and the rear chamber.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Although not described in Patent Document 1, in an uninterruptible power supply (UPS) like the one described in Patent Document 1, the amount of heat generated in the power converter changes when the output capacity of the power converter is changed. Therefore, when the output capacity of the power converter is changed, it is necessary to change the airflow of the cooling fan for the power converter. However, in Patent Document 1, the air drawn in from a common intake port is divided and drawn into the front chamber where the power converter is housed and the rear chamber where components other than the power converter, such as reactors, are housed. Therefore, if the airflow of the cooling fan for the power converter is changed in accordance with the output capacity of the power converter, the amount of air drawn into the rear chamber also changes, so it is necessary to change the airflow of the cooling fan for the transformer that draws air into the rear chamber as well. Consequently, when changing the output capacity of the power converter, it is necessary to readjust the airflow settings for the entire device, which is a burden on the operator. Therefore, it is desirable to cool power converter modules with different output capacities in common while suppressing changes in the airflow for cooling components other than the power converter (power conversion module).

[0006] This invention was made to solve the above-mentioned problems, and one of its objectives is to provide an uninterruptible power supply that can commonly cool power conversion modules with different output capacities while suppressing changes in the airflow for cooling components other than the power conversion modules. [Means for solving the problem]

[0007] To achieve the above objective, an uninterruptible power supply according to one aspect of this invention includes a power conversion module comprising: a power conversion unit that converts and outputs input power; an AC reactor connected at least to the output side of the power conversion unit; and a first cooling fan that cools the power conversion unit and the AC reactor; a DC reactor connected between a power storage unit that supplies DC power to the power conversion unit and the power conversion unit; a second cooling fan that cools at least the DC reactor; and the power conversion module and the DC reactor. , second cooling fanThe device comprises a housing in which a power conversion module is arranged, the housing being configured to accommodate multiple types of power conversion modules having different output capacities, and a first section being partitioned so as to form an airflow path for air flowing in by a first cooling fan, thereby ensuring that all of the multiple types of power conversion modules are cooled in common; and a second section being partitioned from the first section, in which at least a DC reactor is arranged, and an airflow path for air flowing in by a second cooling fan is formed.

[0008] In an uninterruptible power supply according to one aspect of this invention, as described above, the housing is configured to accommodate multiple types of power conversion modules with different output capacities, and is partitioned to form an airflow path for air drawn in by a first cooling fan, thereby cooling all of the multiple types of power conversion modules in common; and is partitioned from the first section, and contains at least a DC reactor, and forms an airflow path for air drawn in by a second cooling fan. This allows the airflow path formed in the first section of the housing to be partitioned from the airflow path formed in the second section, so that the components placed in the first and second sections can be cooled by air separately drawn into each of them. Therefore, when changing the output capacity of the power conversion modules placed in the first section, even if the airflow in the first section is changed by changing the airflow of the first cooling fan, it is possible to suppress changes in the airflow in the second section. As a result, power conversion modules with different output capacities can be cooled in common while suppressing changes in the airflow for cooling components other than the power conversion modules.

[0009] In the uninterruptible power supply according to the first aspect described above, preferably, a transformer is further provided, connected to the output side of the power conversion unit and located in a second compartment of the housing. The second compartment of the housing is configured to accommodate multiple types of transformers with different output capacities, and is partitioned in such a way that an airflow path for air flowing in by a second cooling fan is formed, so that all of the multiple types of transformers are cooled in common. As a result, when a transformer is located in the second compartment, since the second compartment is partitioned from the first compartment, the airflow path for cooling the transformer located in the second compartment can be partitioned from the first compartment. Therefore, when the output capacity of the transformer is changed, it is possible to suppress changes in the degree of cooling in the first compartment due to changes in the amount of heat generated by the transformer. As a result, it is possible to cool transformers with different output capacities in common while suppressing changes in the degree of cooling for the power conversion module.

[0010] In the uninterruptible power supply according to the first aspect described above, preferably, the power conversion unit is located above the AC reactor in the power conversion module, and the first cooling fan has a power conversion unit fan for cooling the power conversion unit and an AC reactor fan for cooling the AC reactor. Here, in the power conversion module, the amount of heat generated from the power conversion unit is smaller than the amount of heat generated from the AC reactor. Therefore, if the AC reactor and the power conversion unit are cooled together by a common cooling fan, it may result in supplying more cooling air than necessary to the power conversion unit, which generates less heat, or insufficient cooling air supply to the AC reactor, which generates more heat. In contrast, in the present invention, the first cooling fan has a power conversion unit fan for cooling the power conversion unit and an AC reactor fan for cooling the AC reactor. As a result, since the power conversion unit fan and the AC reactor fan are provided separately, the power conversion unit and the AC reactor can be cooled by air with different airflow volumes. Therefore, the power conversion unit and the AC reactor can be cooled by an appropriate airflow.

[0011] In this case, preferably, the fan for the power conversion unit and the fan for the AC reactor are located on the front side of the housing in the power conversion module, and the AC reactor fan has a larger airflow than the fan for the power conversion unit. As a result, since the fan for the power conversion unit and the fan for the AC reactor are located on the front side of the housing in the power conversion module, the airflow of the AC reactor fan that cools the AC reactor located on the lower side of the power conversion module can be made larger than the airflow of the fan for the power conversion unit that cools the power conversion unit located on the upper side. This allows the air that has passed through the power conversion module to circulate upwards on the rear side of the power conversion module. Therefore, heat inside the power conversion module can be efficiently discharged from the top of the housing.

[0012] In an uninterruptible power supply where the power conversion unit is located above the AC reactor in a power conversion module, preferably the power conversion module includes a plate-shaped top plate member that covers the top of the power conversion unit. As a result, since the top of the power conversion module is covered by the top plate member, it is possible to prevent foreign matter such as dust from entering from above the power conversion unit.

[0013] In the uninterruptible power supply according to the first aspect described above, preferably, the housing has a door on the front side and further comprises a display unit located in the door, the display unit being positioned towards one side in the left-right direction in the door, and the door has an air intake vent adjacent to the display unit and positioned towards the other side in the left-right direction to draw outside air into the first compartment. As a result, even when the position height of the display unit located in the door and the position height of the power conversion module inside the housing are approximately equal, the display unit and the air intake vent can be positioned in the door without changing their position height by positioning the display unit towards one side in the left-right direction and positioning the air intake vent in the door towards the other side. Therefore, it is possible to prevent the position height of the display unit from being too high or too low, and to prevent the distance between the power conversion module and the air intake vent from becoming too large. As a result, it is possible to prevent a decrease in the visibility of the display unit and to efficiently draw air into the housing for cooling the power conversion module.

[0014] In this case, preferably, the power conversion unit is positioned towards the other side in the left-right direction of the power conversion module. This allows the power conversion module to be positioned towards the other side in the left-right direction, similar to the intake vent that draws in outside air. Therefore, it is possible to suppress an increase in the separation distance between the power conversion module and the intake vent, and outside air can be efficiently introduced into the power conversion module. As a result, the power conversion module can be efficiently cooled.

[0015] In the uninterruptible power supply according to the first aspect described above, preferably, the first cooling fan is positioned on the front side of the housing in the power conversion module, and on the front side of the housing, it is positioned behind the frame member of the housing. This allows the first cooling fan to be positioned at a distance from the front of the housing, so that air can be efficiently drawn into the interior of the power conversion module compared to when the first cooling fan is positioned close to the front of the housing. Therefore, the power conversion module can be efficiently cooled by the first cooling fan.

[0016] In the uninterruptible power supply according to the first aspect described above, preferably, the first cooling fan is positioned on the front side of the housing in the power conversion module, and the housing includes a plate-shaped partition member that divides the rear side of the housing front to back so as to exhaust air upward on the rear side of the power conversion module, and the partition member has an inclined portion that extends diagonally from below to above the power conversion module as it approaches the rear side. As a result, because the partition member has an inclined portion that extends diagonally, air that has passed through the inside of the power conversion module can be circulated upward on the rear side of the power conversion module along the inclined portion. Therefore, heat inside the power conversion module can be efficiently discharged from the top of the housing.

[0017] In the uninterruptible power supply according to the first aspect described above, preferably, the power conversion module includes a first power conversion module and a second power conversion module, each including a power conversion unit, an AC reactor, and a first cooling fan. The first power conversion module is located in a first section of the housing, and the second power conversion module is located in a third section of the housing that is separated from the first and second sections. The third section is configured to accommodate multiple types of second power conversion modules with different output capacities, and is partitioned in such a way that an airflow path is formed for air flowing in by the first cooling fan of the second power conversion module, so that all of the multiple types of second power conversion modules are cooled in common, separately from the first section. As a result, when the power conversion module has a first power conversion module and a second power conversion module, the first power conversion module and the second power conversion module are located in mutually separated areas of the first and third sections, respectively, so that the first power conversion module and the second power conversion module can be arranged in a thermally independent state from each other. Therefore, changing the output capacity of either the first or second power conversion module can suppress any impact on the cooling performance of the other module. Consequently, when changing the output capacity of either the first or second power conversion module, it is not necessary to evaluate the cooling performance of the other module, thus reducing the effort required for evaluation.

[0018] In this case, preferably, the second power conversion module is arranged in the third section below the first power conversion module, and the housing has a front duct section in the first section that forms a flow path for exhausting air from the rear side of the first power conversion module upward to the housing, a rear duct section in the third section adjacent to the rear side of the front duct section that forms a flow path for exhausting air from the rear side of the second power conversion module upward to the housing, and a side duct section in the second section adjacent to either the left or right side of the front duct section and the rear duct section that forms a flow path for exhausting air upward to the housing. This allows for exhausting air upward to the housing while keeping the airflow paths in each of the first, second, and third sections independent of each other. Therefore, the components arranged in each of the first, second, and third sections can be effectively cooled while keeping them thermally independent of each other.

[0019] In the uninterruptible power supply according to the first aspect described above, preferably, the housing has a front duct portion in the first section that forms a flow path for exhausting air from the rear side of the power conversion module upwards to the housing, and a rear duct portion in the second section that forms a flow path for exhausting air upwards to the housing adjacent to the rear side of the front duct portion. This allows exhaust to be directed upwards to the housing while the flow paths in the first and second sections of the housing are independent of each other, so that the components arranged in the first and second sections can be effectively cooled while remaining thermally independent of each other. Furthermore, since the rear duct portion that exhausts air upwards in the second section is arranged adjacent to the rear side of the front duct portion that exhausts air upwards in the first section, it is possible to suppress an increase in the size of the housing in the left-right direction compared to when the front duct portion of the first section and the rear duct portion of the second section are adjacent to each other along the left-right direction. [Effects of the Invention]

[0020] According to the present invention, as described above, it is possible to commonly cool power conversion modules having different output capacities while suppressing a change in the amount of air for cooling components other than the power conversion module.

Brief Description of the Drawings

[0021] [Figure 1] It is a block diagram showing the overall configuration of the uninterruptible power supply device according to the first embodiment. [Figure 2] It is a circuit diagram showing the configuration of the uninterruptible power supply device of the first embodiment. [Figure 3] It is a perspective view showing the housing of the uninterruptible power supply device according to the first embodiment. [Figure 4] It is a perspective view schematically showing the internal arrangement of the housing. [Figure 5] It is a front view for explaining the arrangement of the power conversion unit in the power conversion module. [Figure 6] It is a top view for explaining the first section, the second section, and the third section of the housing. [Figure 7] It is a cross-sectional view schematically showing a cross-section taken along line VII-VII of FIG. 6. [Figure 8] It is a diagram for explaining the air flow path in the first section and the third section. [Figure 9] It is a cross-sectional view schematically showing a cross-section taken along line IX-IX of FIG. 6. [Figure 10] It is a block diagram showing the overall configuration of the uninterruptible power supply device according to the second embodiment. [Figure 11] It is a circuit diagram showing the configuration of the uninterruptible power supply device according to the second embodiment. [Figure 12] It is a perspective view showing the housing of the uninterruptible power supply device according to the second embodiment. [Figure 13] It is a perspective view schematically showing the internal arrangement of the housing according to the second embodiment. [Figure 14] It is a cross-sectional view schematically showing the internal arrangement of the housing according to the second embodiment.

Modes for Carrying Out the Invention

[0022] The following describes embodiments of the present invention based on the drawings.

[0023] [First Embodiment] The configuration of the uninterruptible power supply 100 according to the first embodiment will be described with reference to Figures 1 to 9.

[0024] (Configuration of an uninterruptible power supply) As shown in Figure 1, the uninterruptible power supply 100 according to the first embodiment comprises a housing 10, a power conversion module 20, a power conversion module 30, a transformer 40, a reactor 51, a reactor 52, and a fan 60. The uninterruptible power supply 100 also comprises a control unit 71, a display unit 72, a switch unit 80, and a terminal unit 90. The power conversion module 20 is an example of the "first power conversion module" and "power conversion module" in the claims. The power conversion module 30 is an example of the "second power conversion module" and "power conversion module" in the claims. The reactor 52 is an example of the "DC reactor" in the claims.

[0025] As shown in Figure 2, the uninterruptible power supply (UPS) 100 is configured to convert AC power from an external AC power source 101 (commercial power source) and output it to an external load 103 during normal operation when AC power is supplied normally from an external AC power source 101. In the event of an abnormality in the AC power source 101, such as a power outage (backup), the UPS 100 is configured to convert DC power from an external backup battery 102 into AC power by power conversion and output it to the load 103. In other words, the UPS 100 is an inverter-type UPS. The UPS 100 may also be configured as a constantly-on-demand commercial power supply system that outputs AC power from the AC power source 101 to the external load 103 without conversion during normal operation. The battery 102 is an example of the "energy storage unit" in the claims.

[0026] As shown in Figure 3, the housing 10 has a roughly rectangular parallelepiped shape. The housing 10 has a door 11 on the front side (X1 direction side). The housing 10 also has a top surface 12 on the upper side (Z1 direction side). The door 11 is provided with intake holes 11a and 11b. The top surface 12 is provided with exhaust holes 12a, 12b, and 12c. In the housing 10, outside air is taken in through the intake holes 11a and 11b, and internal air is discharged through the exhaust holes 12a, 12b, and 12c, thereby cooling the components located inside the housing 10.

[0027] As shown in Figure 1, the following components are arranged inside the housing 10: a power conversion module 20, a power conversion module 30, a transformer 40, a reactor 51, a reactor 52, a fan 60, a control unit 71, a switch unit 80, and a terminal unit 90. Details of the arrangement of each component inside the housing 10 will be described later.

[0028] As shown in Figures 1 and 2, the power conversion module 20 includes a power conversion unit 21, a reactor 22, a reactor 23, a fan 24, and a fan 25. Reactors 22 and 23 are examples of "AC reactors" as defined in the claims. Fan 24 is an example of a "first cooling fan" and a "fan for the power conversion unit" as defined in the claims. Fan 25 is an example of a "first cooling fan" and a "fan for the AC reactor" as defined in the claims.

[0029] The power conversion unit 21 converts the input power and outputs it. Specifically, the power conversion unit 21 converts the AC power supplied from the AC power source 101 and supplies the converted AC power to the load 103. The power conversion unit 21 also converts the DC power supplied from the battery 102 into AC power and supplies the converted AC power to the load 103. The power conversion unit 21 has a converter unit 21a, an inverter unit 21b, and a chopper unit 21c. The converter unit 21a has a rectifier circuit that converts the AC power input from the AC power source 101 into DC power. The DC power converted by the converter unit 21a is output to the inverter unit 21b. The inverter unit 21b converts the input DC power into AC power. The chopper unit 21c boosts the DC power input from the battery 102 and supplies it to the inverter unit 21b. The converter section 21a, inverter section 21b, and chopper section 21c of the power conversion unit 21 have switching elements such as IGBTs (Insulated Gate Bipolar Transistors) that perform power conversion operations. The power conversion unit 21 performs power conversion operations through control processing by the control unit 71, which will be described later.

[0030] Reactors 22 and 23 are electrically connected to the power conversion unit 21. Reactor 22 is connected to the input side of the power conversion unit 21. Reactor 23 is connected to the output side of the power conversion unit 21. Reactors 22 and 23 are AC reactors that suppress harmonics in AC power.

[0031] Fans 24 and 25 cool the power conversion unit 21, reactor 22, and reactor 23. Specifically, fan 24 cools the power conversion unit 21, and fan 25 cools reactors 22 and 23. The rotational speed of fans 24 and 25 is controlled by the control unit 71. Fan 25, which cools reactors 22 and 23, has a larger diameter than fan 24, which cools the power conversion unit 21. Furthermore, fan 25 has a greater airflow than fan 24.

[0032] As shown in Figure 4, the power conversion module 20 is equipped with three fans 24 and two fans 25. The size (diameter) of each of the two fans 25 is larger than the size (diameter) of each of the three fans 24. Furthermore, the total airflow of the two fans 25 is greater than the total airflow of the three fans 24.

[0033] As shown in Figures 1 and 2, the power conversion module 30 includes a power conversion unit 31, a reactor 32, a reactor 33, a fan 34, and a fan 35. Reactors 32 and 33 are examples of "AC reactors" in the claims. Fan 34 is an example of a "first cooling fan" and a "fan for the power conversion unit" in the claims. Fan 35 is an example of a "first cooling fan" and a "fan for the AC reactor" in the claims.

[0034] In the first embodiment, the configuration of each part of the power conversion module 30 is the same as that of each part of the power conversion module 20. That is, the power conversion unit 31, reactor 32, reactor 33, fan 34, and fan 35 are the same as the power conversion unit 21, reactor 22, reactor 23, fan 24, and fan 25, respectively. In detail, the power conversion unit 31 has a converter unit 31a, an inverter unit 31b, and a chopper unit 31c. The converter unit 31a, inverter unit 31b, and chopper unit 31c are the same as the converter unit 21a, inverter unit 21b, and chopper unit 21c. In the uninterruptible power supply 100, two power conversion modules, 20 and 30, which have a common configuration, are connected in parallel to each other. For example, each of the power conversion module 20 and 30 has an output capacity of 50 kVA. Therefore, the uninterruptible power supply 100 has an output capacity of 100 kVA.

[0035] The transformer 40 is connected to the output sides of the power conversion units 21 and 31. Specifically, the transformer 40 is connected to the output sides of the reactor 23 of the power conversion module 20 and the reactor 33 of the power conversion module 30. The transformer 40 transforms the input AC power and outputs it. In addition, the input side and output side of the transformer 40 are electrically isolated.

[0036] Reactor 51 is connected to the AC power input side of power conversion modules 20 and 30. Reactor 51 is connected between the AC power supply 101 and power conversion module 20. Reactor 52 is connected to the DC power input side of power conversion modules 20 and 30. That is, reactor 52 is connected between the battery 102 that supplies DC power to power conversion units 21 and 31 and each of the power conversion units 21 and 31.

[0037] Fan 60 cools the transformer 40, reactor 51, and reactor 52. Fan 60 is located on the top surface 12 of the housing 10 (see Figure 4). The rotation speed of fan 60 is controlled by the control unit 71. For example, three fans 60 are located on the top surface 12 of the housing 10.

[0038] The control unit 71 includes a PCB board. The control unit 71 includes a CPU (Central Processing Unit), ROM (Read Only Memory), and RAM (Random Access Memory), etc. The control unit 71 is, for example, a personal computer, a processor, or circuitry. The control unit 71 also includes non-volatile memory, a hard disk drive (HDD), or an SSD (Solid State Drive), etc. The control unit 71 also controls various parts of the uninterruptible power supply 100. For example, the control unit 71 controls the power conversion operation of the power conversion units 21 and 31, controls the rotation speed of fans 24 and 25, fans 34 and 35, and fan 60, and controls the display of the display unit 72.

[0039] The display unit 72 includes, for example, a liquid crystal display. Based on signals from the control unit 71, the display unit 72 displays, for example, an indication of the operating status of the uninterruptible power supply 100. The display unit 72 is located in the door unit 11.

[0040] As shown in Figure 3, the display unit 72 is positioned on the door unit 11, towards the Y2 direction, which is one side in the left-right direction. Also on the door unit 11, the air intake vent 11a for taking in outside air is positioned adjacent to the display unit 72, towards the Y1 direction, which is the other side in the left-right direction. In the Z direction, the display unit 72 is positioned at a height that is at the face level of a worker standing in front of the door unit 11, for example, to ensure visibility for the worker.

[0041] As shown in Figures 1 and 2, the switch unit 80 includes switches 81, 82, 83, and 84. Switch 81 is located between each of the power conversion modules 20 and 30 and the AC power supply 101. Specifically, switch 81 is connected to the AC power supply 101 side (input side) of the reactor 51. Switch 82 is located between each of the power conversion modules 20 and 30 and the battery 102. Specifically, switch 82 is connected to the battery 102 side (input side) of the reactor 52. Switch 83 is located between each of the power conversion modules 20 and 30 and the load 103. Specifically, switch 83 is located on the load 103 side (output side) of the transformer 40. Switches 81 to 83 include, for example, electromagnetic contactors. Switch 84 is connected to a bypass circuit that supplies AC power from the AC power supply 101 to the load 103 without going through the power conversion units 21 and 31. In other words, the uninterruptible power supply 100 is configured to switch between commercial power supply and inverter power supply by switching the conduction of switch 84. In switch 84, an electromagnetic contactor and a switching element are connected in parallel to each other. The switching element of switch 84 includes, for example, a thyristor. The switching operation of each part of the switch unit 80 is controlled based on a control signal from the control unit 71.

[0042] The terminal section 90 includes a plurality of connection terminals that connect to the outside of the uninterruptible power supply 100. Specifically, the terminal section 90 electrically connects the uninterruptible power supply 100 to an external AC power source 101, a battery 102, and a load 103.

[0043] (Arrangement of each part within the enclosure) As shown in Figure 1, the enclosure 10 is divided into four internal areas: a first section 10a, a second section 10b, a third section 10c, and a self-cooling section 10d. The first section 10a houses the power conversion module 20. The second section 10b houses the transformer 40, reactor 51, reactor 52, and fan 60. The third section 10c houses the power conversion module 30. The self-cooling section 10d houses the control unit 71, switch unit 80, and terminal unit 90. The first section 10a, the second section 10b, and the third section 10c are separated from each other; that is, the first section 10a, the second section 10b, and the third section 10c are thermally independent of each other.

[0044] As shown in Figures 4 and 7, the first section 10a where the power conversion module 20 is located and the third section 10c where the power conversion module 30 is located are positioned in the upper vertical (Z1 direction) region of the housing 10, and are positioned towards the other side in the left-right direction (Y1 direction). In the first section 10a, the power conversion module 20 is located on the front side (X1 direction). The power conversion unit 21 is located above the reactors 22 and 23 (Z1 direction) in the power conversion module 20. Similarly, in the third section 10c, the power conversion module 30 is located on the front side (X1 direction). The power conversion unit 31 is located above the reactors 32 and 33 (Z1 direction) in the power conversion module 30. The power conversion module 30 is located in the third section 10c, below the power conversion module 20 in the first section 10a. Note that Figure 7 shows an example where reactors 23 and 33 are located on the rear side of reactors 22 and 32, respectively. However, the arrangement of reactors 22 and 23 (reactors 32 and 33) may be reversed from the example in Figure 7, or they may be arranged adjacent to each other along the left-right direction rather than the front-to-back direction.

[0045] As shown in Figures 4 and 5, fans 24 and 25 are located on the front side of the housing 10, on the door 11 side (X1 direction side), within the power conversion module 20. Fans 24 and 25 draw in outside air through the intake vent 11a provided in the door 11 located on the front side of the housing 10. Fans 24 and 25 then circulate the drawn-in outside air through the inside of the power conversion module 20 toward the rear side (X2 direction side). Similarly, fans 34 and 35 are also located on the door 11 side (X1 direction side), drawing in outside air through the intake vent 11a and circulating the drawn-in outside air through the inside of the power conversion module 30 toward the rear side (X2 direction side). In other words, the intake vent 11a is configured to draw in outside air into the first compartment 10a and the third compartment 10c. Furthermore, in each of the power conversion modules 20 and 30, the substrates on which the power conversion units 21 and 31 are mounted are arranged to extend along the XY plane. Therefore, by introducing cooling air from the front to the back along the horizontal plane, the pressure loss of the circulating air due to the substrate can be reduced.

[0046] Furthermore, as shown in Figure 5, the power conversion unit 21 is positioned towards the other side in the left-right direction (Y1 direction side) of the power conversion module 20. Similarly, the power conversion unit 31 is positioned towards the other side in the left-right direction (Y1 direction side) of the power conversion module 30. In other words, the power conversion units 21 and 31 are positioned towards the Y1 direction side, which is the same side in the door portion 11 as the side where the air intake vent portion 11a is located.

[0047] As shown in Figures 6 to 8, an airflow path is formed in the first section 10a for air drawn in by fans 24 and 25. Similarly, an airflow path is formed in the third section 10c for air drawn in by fans 34 and 35. The intake port 11a is positioned to overlap fans 24 and 25 and fans 34 and 35 when viewed from the X1 direction, in order to supply sufficient outside air to both fans 24 and 25 and fans 34 and 35. In other words, even if the airflow rate of fans 24 and 25 is changed, the amount of air drawn in by fans 34 and 35 does not change. To put it another way, the first section 10a and the third section 10c are thermally independent of each other.

[0048] In the first compartment 10a, outside air drawn in through the intake port 11a of the door 11 passes through the power conversion module 20 in the X2 direction and is then exhausted upward (towards the Z1 direction) from the exhaust port 12a of the top surface 12. Similarly, in the third compartment 10c, outside air drawn in through the intake port 11a of the door 11 passes through the power conversion module 30 in the X2 direction and is then exhausted upward (towards the Z1 direction) from the exhaust port 12b of the top surface 12.

[0049] As shown in Figure 8, specifically, the housing 10 is provided with a partition member 13. The partition member 13 is a plate-shaped member that divides the rear side (X2 direction side) of the housing 10 front to back so as to exhaust air upward (Z1 direction side) on the rear side (X2 direction side) of the power conversion modules 20 and 30. The partition member 13 also has a slanted portion 13a that extends diagonally from below the power conversion module 20 upward as it approaches the rear side (X2 direction side). The partition member 13 is arranged in the housing 10 from the side on the Y1 direction side in the left-right direction (Y direction) to the partition member 17 (see Figures 4 and 6), which will be described later. On the front side (X1 direction side) of the housing 10, the partition member 13 divides the first section 10a and the third section 10c vertically (Z direction) along the XY plane (horizontal plane). Furthermore, the inclined portion 13a of the partition member 13 is arranged to extend with an oblique inclination from a direction along the XY plane (horizontal plane) to a direction along the YZ plane (vertical plane). The partition member 13 also has an inclined portion 13b on its upper vertical side (Z1 direction side). The inclined portion 13b is arranged to inclinate from the portion extending along the YZ plane (vertical plane) toward the front side (X1 direction side). The portion of the partition member 13 between the inclined portion 13a and the inclined portion 13b is arranged to be aligned with the YZ plane.

[0050] As shown in Figures 4, 6, and 8, duct sections 15a and 15c are formed on the rear side of the housing 10 by partitioning with partition member 13. Duct section 15a forms a flow path in the first section 10a that exhausts air from the rear side of the power conversion module 20 upwards to the housing 10. Duct section 15c forms a flow path in the third section 10c that exhausts air from the rear side of the power conversion module 30 upwards to the housing 10. Duct section 15a is an example of the "front side duct section" in the claims. Duct section 15c is an example of the "rear side duct section" in the claims.

[0051] Thus, the first section 10a and the third section 10c are partitioned vertically on the front side of the housing 10 so that the power conversion modules 20 and 30 are arranged vertically, and the duct sections 15a and 15c are partitioned front to back on the rear side of the housing 10 so that they are arranged front to back. Therefore, in the first section 10a, outside air drawn in from the intake port 11a by fans 24 and 25 flows from the front side to the rear side of the power conversion module 20, and then flows upward along the inclined surface 13a of the partition member 13. Since the airflow of fan 25 is greater than that of fan 24, the air that has passed through the power conversion module 20 is guided upward. The air that has passed through (cooled) the power conversion module 20 then passes upward in the duct section 15a and is exhausted from the exhaust port 12a on the top surface 12. In the third section 10c, outside air drawn in from the intake port 11a by fans 34 and 35 similarly passes through (cools) the power conversion module 30 from the front to the rear, then flows upward through the duct section 15c and is exhausted from the exhaust port 12b on the top surface 12. In the third section 10c as well, since the airflow of fan 35 is greater than that of fan 34, the air that has passed through the power conversion module 30 is guided upward.

[0052] As shown in Figure 8, the power conversion module 20 includes a top plate member 14. The top plate member 14 is a plate-shaped member that covers the top of the power conversion unit 21 in the power conversion module 20. A transformer for the power conversion unit (not shown) is also located on the top plate member 14. In the first section 10a, the top plate member 14 prevents the air exhausted from the back of the power conversion module 20 from being returned to the inside of the power conversion unit 21, and instead exhausts it through the exhaust holes 12a on the top surface 12.

[0053] Furthermore, in the power conversion module 20, fans 24 and 25 are positioned on the front side of the housing 10, but further back (towards the X2 direction) than the frame member 16 of the housing 10. That is, fans 24 and 25 are positioned at a distance from the door portion 11 in the X2 direction. The frame member 16 is, for example, a member extending in the Z direction at the four corners of the housing 10 (see Figure 4).

[0054] As shown in Figures 4, 6, and 9, an airflow path for air flowing in by the fan 60 is formed in the second section 10b. The second section 10b is partitioned from the first section 10a and the third section 10c by a partitioning member 17 on the upper side (Z1 direction side) of the housing 10. The partitioning member 17 is a plate-shaped member that follows the XZ plane and partitions the upper side of the housing 10 left and right. By being partitioned by the partitioning member 17, a duct section 15b is formed in the second section 10b so as to be adjacent to the side surface in the Y2 direction, which is either the left or right side of the duct section 15a of the first section 10a or the duct section 15c of the third section 10c. Specifically, the duct section 15b is provided in the upper vertical (Z1 direction) region of the housing 10, adjacent to the first section 10a and the third section 10c, which are located towards the other side in the left-right direction (Y1 direction), on the Y2 direction side. The duct section 15b forms a flow path for exhausting air upwards from the housing 10 on the Y2 direction side of the housing 10. Note that the duct section 15b is an example of the "side duct section" in the claims.

[0055] Furthermore, the second compartment 10b is separated from the self-cooling compartment 10d by a partition member 18 on the lower side (Z2 direction side) of the housing 10. The partition member 18 partitions the lower side of the housing 10 front to back along the YZ plane. The partition member 18 also has a portion on the upper side (Z1 direction side) that is aligned with the horizontal plane (XY plane). That is, the partition member 18 vertically partitions the duct section 15b and the self-cooling compartment 10d, which will be described later, on the upper side. In addition, a gap that allows air to flow is provided on the lower side (Z2 direction side) of the partition member 18. That is, the bottom surface of the housing 10 (Z2 direction side) and the end of the partition member 18 on the Z2 direction side are separated by a predetermined distance.

[0056] In the second section 10b, the transformer 40, reactor 51, and reactor 52 are arranged on the rear side (X2 direction side) of the section member 18. Reactors 51 and 52 are positioned above the transformer 40. Although Figures 4 and 9 show an example where reactor 52 is positioned adjacent to reactor 51 on its rear side, the arrangement of reactors 51 and 52 may be reversed from the examples in Figures 4 and 9, or they may be positioned adjacent to each other along the left-right direction instead of the front-back direction.

[0057] As shown in Figure 9, in the second compartment 10b, the air inside the housing 10 is exhausted to the outside by a fan 60 located on the top surface 12 of the housing 10. That is, in the second compartment 10b, outside air drawn in from the intake port 11b located below the door portion 11 of the housing 10 (on the Z1 side) flows into the rear side of the housing 10, passing below the partition member 18. The drawn-in outside air then circulates upward on the rear side of the partition member 18, cooling the transformer 40, reactor 51, and reactor 52. The air that has passed through (cooled) the transformer 40, reactor 51, and reactor 52 is then drawn upward by the fan 60, passing through the duct portion 15b on the Y2 side of the housing 10, and is exhausted from the exhaust port 12c.

[0058] As shown in Figures 4 and 7, the self-cooling compartment 10d is located on the lower vertical side (Z2 direction) of the housing 10, and is positioned towards the front side (X1 direction). That is, the self-cooling compartment 10d is located on the front side of the compartment member 18. The self-cooling compartment 10d is not equipped with a fan for intake air from outside the housing 10, nor a fan for exhaust air to the outside. The control unit 71, switch unit 80, and terminal unit 90 located in the self-cooling compartment 10d generate less heat than the components located in the first compartment 10a, second compartment 10b, and third compartment 10c, respectively. In the self-cooling compartment 10d, the control unit 71, switch unit 80, and terminal unit 90 are naturally cooled by convection of air within the area. Furthermore, the self-cooling compartment 10d is thermally independent from the first compartment 10a, second compartment 10b, and third compartment 10c, respectively. In other words, the self-cooling compartment 10d is configured so that air heated by the heat generated in the first compartment 10a, the second compartment 10b, and the third compartment 10c does not flow into it. In the self-cooling compartment 10d, the control unit 71, the switch unit 80, and the terminal unit 90 are arranged in this order from the upper side in the vertical direction (Z1 direction side).

[0059] (Change in output capacity) In the first embodiment, the first section 10a is configured to accommodate multiple types of power conversion modules 20 having different output capacities. The second section 10b is configured to accommodate multiple types of transformers 40, reactors 51 and 52 having different output capacities. The third section 10c is configured to accommodate multiple types of power conversion modules 30 having different output capacities.

[0060] Specifically, in the first section 10a, airflow paths are formed by fans 24 and 25, allowing all of the multiple types of power conversion modules 20 to be cooled in common. In the second section 10b, airflow paths are formed by fan 60, allowing all of the multiple types of transformers 40, reactors 51 and 52 to be cooled in common. In the third section 10c, airflow paths are formed by fans 34 and 35, allowing all of the multiple types of power conversion modules 30 to be cooled in common.

[0061] The uninterruptible power supply 100 is configured such that, for example, by having a common arrangement of fastening holes, components can be arranged in common even when the output capacity is changed in each of the first section 10a, the second section 10b, and the third section 10c. Furthermore, since the first section 10a, the second section 10b, and the third section 10c are each partitioned from one another, the airflow rate (air volume) of the cooling air in each of the first section 10a, the second section 10b, and the third section 10c is set according to the output capacity of the components arranged in each of the first section 10a, the second section 10b, and the third section 10c.

[0062] Furthermore, the power conversion module 20 located in the first section 10a and the power conversion module 30 located in the third section 10c are of the same type. That is, the power conversion module 20 located in the first section 10a is configured to be located in the third section 10c, and the power conversion module 30 located in the third section 10c is configured to be located in the first section 10a.

[0063] <Evaluation of cooling performance> In the uninterruptible power supply 100, the power conversion module 20 located in the first section 10a and the power conversion module 30 located in the third section 10c have a common configuration and equal output capacity. Therefore, when evaluating the cooling performance (degree of cooling) of the power conversion modules 20 and 30, the evaluation is performed on either one of the power conversion modules 20 or 30, while the evaluation of the other is omitted. For example, if the airflow of fans 24 and 25 is set considering the heat generated by the power conversion unit 21, reactor 22, and reactor 23 after evaluating the power conversion module 20, the airflow of fans 34 and 35 is set to the same airflow as fans 24 and 25 without evaluating the power conversion module 30.

[0064] In other words, in order to ensure that the cooling performance is the same in the first section 10a and the third section 10c, the airflow path in the first section 10a and the airflow path in the third section 10c are configured such that the pressure loss is equal to each other. Furthermore, the duct section 15a and the duct section 15c are configured such that the flow rate of air circulating inside them is approximately equal to each other.

[0065] Furthermore, in the control unit 71, switch unit 80, and terminal unit 90 located in the self-cooling compartment 10d, the cooling performance is evaluated at a relatively large output capacity, thereby omitting the evaluation of cooling performance at output capacities smaller than those evaluated. The uninterruptible power supply 100 is configured such that the first compartment 10a, the second compartment 10b, the third compartment 10c, and the self-cooling compartment 10d are thermally independent of each other, making it possible to omit the evaluation of cooling performance. In addition, the uninterruptible power supply 100 is configured such that the first compartment 10a, the second compartment 10b, the third compartment 10c, and the self-cooling compartment 10d are thermally independent of each other, making it possible to evaluate the cooling performance of each compartment individually.

[0066] [Effects of the First Embodiment] In the first embodiment, the following effects can be obtained.

[0067] In the first embodiment, as described above, the housing 10 is configured to accommodate multiple types of power conversion modules 20 with different output capacities, and includes a first section 10a where all of the multiple types of power conversion modules 20 are cooled in common, by being partitioned so that airflow paths are formed for air drawn in by fans 24 and 25 (first cooling fans), and a second section 10b which is partitioned from the first section 10a and has at least a reactor 52 (DC reactor) and where airflow paths are formed for air drawn in by fan 60 (second cooling fan). As a result, the airflow paths formed in the first section 10a and the airflow paths formed in the second section 10b of the housing 10 can be partitioned, so that the components arranged in the first section 10a and the second section 10b can be cooled by air separately drawn into each of them. Therefore, when changing the output capacity of the power conversion module 20 located in the first section 10a, even if the airflow in the first section 10a is changed by changing the airflow of fans 24 and 25, it is possible to suppress changes in the airflow in the second section 10b. As a result, power conversion modules 20 with different output capacities can be cooled in common while suppressing changes in the airflow for cooling components other than the power conversion module 20.

[0068] Furthermore, in the first embodiment, as described above, a transformer 40 is provided that is connected to the output side of the power conversion units 21 and 31 and located in the second section 10b of the housing 10. The second section 10b of the housing 10 is configured to accommodate multiple types of transformers 40 with different output capacities, and is partitioned in such a way that an airflow path is formed for air flowing in by the fan 60 (second cooling fan), so that all of the multiple types of transformers 40 are cooled in common. As a result, when a transformer 40 is located in the second section 10b, since the second section 10b is partitioned from the first section 10a, the airflow path for cooling the transformer 40 located in the second section 10b can be partitioned from the first section 10a. Therefore, when the output capacity of the transformer 40 is changed, it is possible to suppress changes in the degree of cooling in the first section 10a due to changes in the amount of heat generated by the transformer 40. As a result, it is possible to cool multiple transformers 40 with different output capacities in common while suppressing changes in the degree of cooling for the power conversion module 20.

[0069] Furthermore, in the first embodiment, as described above, the power conversion units 21 and 31 are arranged above the reactors 22 and 23, 32 and 33 (AC reactors) in the power conversion modules 20 and 30, and the fans 24, 25, 34 and 35 (first cooling fans) include fans 24 and 34 (fans for the power conversion unit) that cool the power conversion unit 21 (31) and fans 25 and 35 (fans for the AC reactors) that cool the reactors 22 and 23 (32 and 33). Here, in the power conversion module 20 (30), the amount of heat generated from the power conversion unit 21 (31) is smaller than the amount of heat generated from the reactors 22 and 23 (32 and 33). Therefore, when the reactors 22 and 23 (32 and 33) and the power conversion unit 21 (31) are cooled together by a common cooling fan, it becomes possible to supply more cooling air than necessary to the power conversion unit 21 (31), which generates less heat, or to supply insufficient cooling air to the reactors 22 and 23 (32 and 33), which generate more heat. In contrast, in the first embodiment, the uninterruptible power supply 100 has a fan 24 (34) for cooling the power conversion unit 21 (31) and a fan 25 (35) for cooling the reactors 22 and 23 (32 and 33). As a result, by providing the fan 24 (34) and the fan 25 (35) separately, the power conversion unit 21 (31) and the reactors 22 and 23 (32 and 33) can each be cooled by air at different airflow rates. Therefore, the power conversion unit 21 (31) and the reactors 22 and 23 (32 and 33) can be cooled by an appropriate airflow.

[0070] Furthermore, in the first embodiment, as described above, fans 24, 34 (fans for the power conversion unit) and fans 25, 35 (fans for the AC reactor) are located on the front side of the housing 10 in the power conversion module 20(30), and fans 25 and 35 have a larger airflow than fans 24 and 34. As a result, because fans 24, 34 and fans 25, 35 are located on the front side of the housing 10 in the power conversion modules 20 and 30, the airflow of fan 25(35) that cools the reactors 22, 23, 32, and 33 (AC reactors) located on the lower side of the power conversion module 20(30) can be made larger than the airflow of fan 24(34) that cools the power conversion unit 21(31) located on the upper side, thereby allowing the air that has passed through the power conversion module 20(30) to circulate upward on the rear side of the power conversion module 20(30). Therefore, the heat inside the power conversion module 20 (30) can be efficiently discharged from the top of the housing 10.

[0071] Furthermore, in the first embodiment, as described above, the power conversion module 20(30) includes a plate-shaped top plate member 14 that covers the top of the power conversion unit 21(31). As a result, the top of the power conversion module 20(30) is covered by the top plate member 14, which prevents foreign matter such as dust from entering from above the power conversion unit 21(31).

[0072] Furthermore, in the first embodiment, as described above, the housing 10 has a door portion 11 on the front side, and the uninterruptible power supply 100 includes a display unit 72 located on the door portion 11. The display unit 72 is positioned on one side of the door portion 11 in the left-right direction, and the door portion 11 has an air intake vent 11a positioned on the other side of the left-right direction adjacent to the display unit 72, allowing outside air to be drawn into the first compartment 10a. As a result, even when the positioning height of the display unit 72 located on the door portion 11 is approximately equal to the positioning height of the power conversion module 20(30) inside the housing 10, the display unit 72 and the air intake vent 11a can be positioned on the door portion 11 without changing their positioning height by positioning the display unit 72 on one side of the left-right direction and positioning the air intake vent 11a of the door portion 11 on the other side. Therefore, it is possible to prevent the display unit 72 from being positioned too high or too low, and to prevent the distance between the power conversion module 20(30) and the air intake vent 11a from becoming too large. As a result, it is possible to prevent a decrease in the visibility of the display unit 72, and to efficiently draw air into the housing 10 to cool the power conversion module 20(30).

[0073] Furthermore, in the first embodiment, as described above, the power conversion unit 21(31) is positioned towards the other side in the left-right direction of the power conversion module 20(30). This allows the power conversion module 20(30) to be positioned towards the other side in the left-right direction, similar to the intake port 11a that draws in outside air. Therefore, it is possible to suppress the separation distance between the power conversion module 20(30) and the intake port 11a from becoming large, so that outside air can be efficiently introduced into the power conversion module 20(30). As a result, the power conversion module 20(30) can be efficiently cooled.

[0074] Furthermore, in the first embodiment, as described above, the fans 24, 25, 34, and 35 (first cooling fans) are positioned on the front side of the housing 10 in the power conversion module 20(30), and are positioned on the rear side of the housing 10 relative to the frame member 16 of the housing 10. This allows the fans 24 and 25 (34 and 35) to be positioned at a distance from the front of the housing 10, enabling more efficient airflow into the power conversion module 20(30) compared to the case where the fans 24 and 25 (34 and 35) are positioned close to the front of the housing 10. As a result, the power conversion module 20(30) can be efficiently cooled by the fans 24 and 25 (34 and 35).

[0075] Furthermore, in the first embodiment, as described above, fans 24, 25, 34, and 35 (first cooling fans) are arranged on the front side of the housing 10 in the power conversion module 20(30). The housing 10 includes a plate-shaped partition member 13 that divides the rear side of the housing 10 into front and rear sections so as to exhaust air upward on the rear side of the power conversion module 20(30). The partition member 13 has an inclined portion 13a that extends diagonally from below to above the power conversion module 20(30) as it approaches the rear side. As a result, because the partition member 13 has an inclined portion 13a that extends diagonally, air that has passed through the inside of the power conversion module 20(30) can be circulated upward on the rear side of the power conversion module 20(30) along the inclined portion 13a. Therefore, heat inside the power conversion module 20(30) can be efficiently discharged from the top of the housing 10.

[0076] Furthermore, in the first embodiment, as described above, the uninterruptible power supply 100 includes a power conversion module 20 (first power conversion module) and a power conversion module 30 (second power conversion module), each including a power conversion unit 21 (31), reactors 22 and 23, 32 and 33 (AC reactors), and fans 24 and 25, 34 and 35 (first cooling fans). The power conversion module 20 is located in a first section 10a of the housing 10, and the power conversion module 30 is located in a third section 10c of the housing 10, which is separated from the first section 10a and the second section 10b. The third section 10c is configured to accommodate multiple types of power conversion modules 30 with different output capacities, and is partitioned in such a way that airflow paths are formed for air drawn in by the fans 34 and 35 of the power conversion modules 30, so that all of the multiple types of power conversion modules 30 are cooled in common, separately from the first section 10a. As a result, when power conversion modules 20 and 30 are present, they are arranged in mutually partitioned areas of the first section 10a and the third section 10c, respectively, allowing them to be arranged thermally independently of each other. Therefore, changing the output capacity of either power conversion module 20 or power conversion module 30 can suppress any impact on the cooling level of the other. Consequently, when changing the output capacity of either power conversion module 20 or power conversion module 30, there is no need to evaluate the cooling level of the other, thus reducing the effort required for evaluation.

[0077] Furthermore, in the first embodiment, as described above, the power conversion module 30 (second power conversion module) is arranged in the third section 10c below the power conversion module 20 (first power conversion module), and the housing 10 has a duct section 15a (front duct section) in the first section 10a that forms a flow path for exhausting from the rear side of the power conversion module 20 to the upper part of the housing 10, a duct section 15c (rear duct section) in the third section 10c that is adjacent to the rear side of the duct section 15a and forms a flow path for exhausting from the rear side of the power conversion module 30 to the upper part of the housing 10, and a duct section 15b (side duct section) in the second section 10b that is adjacent to either the left or right side of the duct section 15a and the duct section 15c and forms a flow path for exhausting to the upper part of the housing 10. This allows air to be exhausted upwards from the housing 10 while maintaining independent airflow paths in each of the first section 10a, the second section 10b, and the third section 10c. As a result, the components located in each of the first section 10a, the second section 10b, and the third section 10c can be effectively cooled while maintaining thermal independence from each other.

[0078] [Second Embodiment] Next, the configuration of the uninterruptible power supply 200 according to the second embodiment will be described with reference to Figures 10 to 14. Unlike the first embodiment, which had two power conversion modules 20 and 30, the second embodiment has one power conversion module 20. Components similar to those in the first embodiment are denoted by the same reference numerals and their description is omitted.

[0079] (Configuration of the uninterruptible power supply according to the second embodiment) As shown in Figure 10, the uninterruptible power supply 200 according to the second embodiment includes a housing 210. Inside the housing 210, a power conversion module 20, a transformer 40, a reactor 51, a reactor 52, a fan 60, a control unit 71, a switch unit 80, and a terminal unit 90 are arranged.

[0080] As shown in Figure 11, the uninterruptible power supply 200 differs from the uninterruptible power supply 100 of the first embodiment in that it is equipped with one power conversion module 20. The configuration of the power conversion module 20 is the same as in the first embodiment.

[0081] As shown in Figure 12, the housing 210 has a roughly rectangular parallelepiped shape. The housing 210 has a door portion 211 on the front side (X1 direction side). The housing 210 also has a top surface 212 on the upper side (Z1 direction side). The door portion 211 is provided with intake holes 211a and intake holes 211b. The top surface 212 is provided with exhaust holes 212a and exhaust holes 212b. Similar to the housing 10 of the first embodiment, in the housing 210, outside air is taken in through the intake holes 211a and intake holes 211b, and internal air is discharged through the exhaust holes 212a and exhaust holes 212b, thereby cooling the components located inside the housing 210.

[0082] As shown in Figures 10 and 13, the enclosure 210 is divided into three internal areas: a first section 10a, a second section 210b, and a self-cooling section 210d. The first section 10a houses the power conversion module 20, as in the first embodiment. The second section 210b houses the transformer 40, reactor 51, reactor 52, and fan 60, as in the second section 10b of the first embodiment. The self-cooling section 210d houses the control unit 71, switch unit 80, and terminal unit 90, as in the self-cooling section 10d of the first embodiment. The first section 10a and the second section 210b are separated from each other; that is, the first section 10a and the second section 210b are thermally independent of each other.

[0083] As shown in Figures 13 and 14, in the first compartment 10a, similar to the first embodiment, outside air drawn in from the intake port 211a by fans 24 and 25 flows from the front to the back of the power conversion module 20, and then flows upward along the compartment member 13. The air that has passed through (cooled) the power conversion module 20 then passes upward through the duct 15a and is exhausted from the exhaust port 212a on the top surface 212. The intake port 211a is positioned adjacent to the display unit 72 in the left-right direction (Y direction), similar to the intake port 11a in the first embodiment. That is, the intake port 211a is positioned towards the Y1 direction side of the door unit 211. In the power conversion module 20 of the first compartment 10a, similar to the first embodiment, the power conversion unit 21 is positioned towards the Y1 direction side of the door unit 211, similar to the side where the intake port 211a is located.

[0084] In the second embodiment, the second compartment 210b is provided on the rear side of the housing 210 such that it has a duct portion 215b on the rear side of the duct portion 15a of the first compartment 10a. Specifically, the second compartment 210b is partitioned from the self-cooling compartment 210d, which will be described later, by a partitioning member 218 on the lower side (Z2 direction side) of the housing 210. The partitioning member 218 extends to a position where its upper end reaches the first compartment 10a. In addition, a gap that allows air to flow is provided on the lower side (Z2 direction side) of the partitioning member 218. The second compartment 210b is provided so as to communicate from the bottom surface to the top surface 212 of the housing 10, spanning from the rear side of the partitioning member 218 to the rear side of the duct portion 15a of the first compartment 10a. The duct section 215b forms an exhaust flow path upward of the housing 210, adjacent to the rear side of the duct section 15a in the second section 210b. Note that the duct section 215b is an example of the "rear side duct section" in the claims.

[0085] In the second compartment 210b, similar to the second compartment 10b in the first embodiment, the transformer 40, reactor 51, and reactor 52 are arranged on the rear side of the partition member 218. In the second compartment 210b, the air inside the housing 210 is exhausted to the outside by a fan 60 located on the top surface 212 of the housing 210. That is, similar to the first embodiment, in the second compartment 210b, outside air drawn in from the intake hole 211b located below the door portion 211 of the housing 210 (on the Z1 direction side) flows into the rear side of the housing 210, passing below the partition member 218. The drawn-in outside air then circulates upward on the rear side of the partition member 218, cooling the transformer 40, reactor 51, and reactor 52. In the second embodiment, since the duct section 215b is provided across the entire rear surface, the air that has passed through (cooled) the transformer 40, reactor 51, and reactor 52 is drawn in by the fan 60 and exhausted upwards through the exhaust port section 212b.

[0086] The self-cooling compartment 210d, like the self-cooling compartment 10d in the first embodiment, is located on the lower vertical side (Z2 direction side) within the housing 210, and is positioned towards the front side (X1 direction side) of the compartment member 18. In the self-cooling compartment 210d, similar to the self-cooling compartment 10d, the control unit 71, the switch unit 80, and the terminal unit 90 are naturally cooled by air convection within the area.

[0087] Furthermore, the other configurations of the second embodiment are the same as those of the first embodiment.

[0088] [Effects of the second embodiment] In the second embodiment, the following effects can be obtained.

[0089] In the second embodiment, as described above, the housing 210 has a duct section 15a (front duct section) in the first section 10a that forms a flow path for exhausting air from the rear side of the power conversion module 20 upwards to the housing 210, and a duct section 215b (rear duct section) in the second section 210b that is adjacent to the rear side of the duct section 15a and forms a flow path for exhausting air upwards to the housing 210. As a result, in each of the first section 10a and the second section 210b of the housing 210, the flow paths can be made independent of each other while exhausting air upwards to the housing 210, so that the components arranged in each of the first section 10a and the second section 210b can be effectively cooled while being thermally independent of each other. Furthermore, since the duct section 215b that exhausts upward in the second section 210b is positioned adjacent to the rear side of the duct section 15a that exhausts upward in the first section 10a, it is possible to suppress an increase in the size of the housing 210 in the left-right direction compared to the case where the duct section 15a of the first section 10a and the duct section 215b of the second section 210b are adjacent to each other along the left-right direction. Other effects of the second embodiment are the same as those of the first embodiment.

[0090] [Differentiation] It should be noted that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims rather than by the description of the embodiments above, and further includes all modifications (exceptions) within the meaning and scope equivalent to the claims.

[0091] For example, in the first and second embodiments described above, an example was shown in which the transformer 40 is located in the second compartment 10b (210b) of the housing 10 (210), but the present invention is not limited thereto. For example, the transformer does not have to be located in the second compartment. That is, the uninterruptible power supply may be a transformerless, non-isolated type.

[0092] Furthermore, in the first and second embodiments described above, examples were shown in which fans 24 and 34 (fans for the power conversion unit) for cooling the power conversion unit 21 (31) and fans 25 and 35 (fans for the AC reactors) for cooling the reactors 22, 23, 32 and 33 (AC reactors) are provided separately in the power conversion module 20 (30), but the present invention is not limited to this. In the present invention, the power conversion unit and the AC reactor may be cooled by a common cooling fan in the power conversion module.

[0093] Furthermore, although the first embodiment described above shows an example in which a power conversion module 20 (first power conversion module) and a power conversion module 30 (second power conversion module) with the same output capacity are provided, the present invention is not limited to this. In the present invention, the first power conversion module and the second power conversion module may have output capacities of different sizes.

[0094] Furthermore, in the first and second embodiments described above, the display unit 72 is positioned to one side of the door unit 11(211) in the left-right direction, and the air intake vents 11a(211a) are positioned adjacent to the display unit 72 on the door unit 11(211). However, the present invention is not limited to these examples. In the present invention, air intake vents for drawing in outside air into the first compartment may be positioned adjacent to the display unit, both above and below it.

[0095] Furthermore, although the first embodiment described above shows an example in which the first section 10a and the third section 10c are configured to draw in outside air from a common intake port 11a, the present invention is not limited to this. In the present invention, an intake port for drawing in outside air may be provided in the third section separately from an intake port for drawing in outside air in the first section.

[0096] Furthermore, although the first embodiment described above shows an example in which the uninterruptible power supply 100 (200) is configured to be supplied with DC power from an external battery 102 (energy storage unit), the present invention is not limited to this. In the present invention, the uninterruptible power supply may be configured to include an internal energy storage unit. In that case, the energy storage unit may be placed in a self-cooling compartment separated from the first compartment, the second compartment, and the third compartment. [Explanation of symbols]

[0097] 10,210 cabinets 10a Section 1 10b, 210b Section 2 10c Section 3 11, 211 Door section 11a, 211a Intake port 13 Partition Members 13a Slope 14. Top plate component 15a Duct section (front side duct section) 15b Duct section (side duct section) 15c Duct section (rear side duct section) 16 Frame members 20 Power Conversion Modules (Power Conversion Module, First Power Conversion Module) 21, 31 Power conversion section 22, 23, 32, 33 Reactors (AC reactors) 24, 34 Fans (First Cooling Fan, Fan for Power Conversion Unit) 25, 35 Fan (First cooling fan, fan for AC reactor) 30 Power Conversion Modules (Power Conversion Module, Second Power Conversion Module) 40 transformers 52. Reactor (DC reactor) 60 Fan (Second Cooling Fan) 72 Display section 100, 200 uninterruptible power supply 101 AC power supply 102 load 215b Duct section (rear side duct section)

Claims

1. A power conversion module including a power conversion unit that converts and outputs input power, an AC reactor connected to at least the output side of the power conversion unit, and a first cooling fan that cools the power conversion unit and the AC reactor, A DC reactor is connected between the power storage unit that supplies DC power to the power conversion unit and the power conversion unit, At least a second cooling fan for cooling the DC reactor, The power conversion module, the DC reactor, and the second cooling fan are housed inside a housing, The aforementioned enclosure is The system is configured to accommodate multiple types of power conversion modules with different output capacities, and is partitioned so that an airflow path is formed for the air drawn in by the first cooling fan, thereby providing common cooling for all of the multiple types of power conversion modules. An uninterruptible power supply comprising a second compartment, which is separated from the first compartment and in which at least the DC reactor is located and an airflow path for air flowing in by the second cooling fan is formed.

2. The uninterruptible power supply according to claim 1, wherein the second compartment of the housing is configured to accommodate multiple types of transformers having different output capacities, and is partitioned in such a way that an airflow path is formed for air to flow in by the second cooling fan, thereby cooling all of the multiple types of transformers in common.

3. The power conversion unit is located above the AC reactor in the power conversion module. The uninterruptible power supply according to claim 1 or 2, wherein the first cooling fan comprises a power conversion fan for cooling the power conversion unit and an AC reactor fan for cooling the AC reactor.

4. The fan for the power conversion unit and the fan for the AC reactor are located on the front side of the housing in the power conversion module. The uninterruptible power supply according to claim 3, wherein the fan for the AC reactor has a greater airflow than the fan for the power conversion unit.

5. The uninterruptible power supply according to claim 3, wherein the power conversion module includes a plate-shaped top plate member that covers the top of the power conversion unit.

6. The aforementioned housing has a door on the front side, The door portion further comprises a display unit, The display unit is positioned on one side of the door section in the left-right direction. The uninterruptible power supply according to claim 1 or 2, wherein the door portion has an intake vent portion that is positioned to the other side in the left-right direction adjacent to the display portion and draws outside air into the first compartment.

7. The uninterruptible power supply according to claim 6, wherein the power conversion unit is positioned towards the other side in the left-right direction within the power conversion module.

8. The uninterruptible power supply according to claim 1 or 2, wherein the first cooling fan is located on the front side of the housing in the power conversion module, and is located on the front side of the housing, further back than the frame member of the housing.

9. The first cooling fan is located on the front side of the housing in the power conversion module. The housing includes a plate-shaped partitioning member that divides the rear side of the housing into front and rear sections so as to exhaust air upward on the rear side of the power conversion module. The uninterruptible power supply according to claim 1 or 2, wherein the partition member has a sloping portion that extends diagonally from below to above the power conversion module as it approaches the rear side.

10. The power conversion module includes a first power conversion module and a second power conversion module, each including the power conversion unit, the AC reactor, and the first cooling fan. The first power conversion module is located in the first section of the housing, The second power conversion module is located in a third section of the housing that is separated from the first and second sections. The uninterruptible power supply according to claim 1 or 2, wherein the third section is configured to accommodate a plurality of types of second power conversion modules having different output capacities, and is partitioned in such a way that a flow path for air flowing in by the first cooling fan of the second power conversion module is formed, so that all of the plurality of types of second power conversion modules are cooled in common separately from the first section.

11. The second power conversion module is arranged in the third section, below the first power conversion module, The aforementioned enclosure is The first compartment has a front duct portion that forms a flow path for exhausting air from the rear side of the first power conversion module upwards to the housing, The third section has a rear duct section adjacent to the rear side of the front duct section, which forms a flow path for exhausting air from the rear side of the second power conversion module upwards to the housing, The uninterruptible power supply according to claim 10, wherein the second section has a side duct portion that forms a flow path for exhausting air upwards to the housing, adjacent to either the left or right side of the front duct portion and the rear duct portion.

12. The aforementioned enclosure is The first section has a front duct portion that forms a flow path for exhausting air from the rear side of the power conversion module to the upper side of the housing, The uninterruptible power supply according to claim 1 or 2, wherein the second section has a rear duct portion that forms a flow path for exhausting air upwards to the housing, adjacent to the rear side of the front duct portion.

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