Uninterruptible power supply device

Abstract

An uninterruptible power supply device (100) is provided with: a housing (110) having a rectangular parallelepiped shape; a plurality of units (10, 20, 30) housed in the housing (110) in layers in the up-down direction; and a fan unit (120) having a plurality of fans arranged side by side on an upper surface of the housing (110). An opening (114, 116) for leading a wire into the housing (110) is formed in each of the upper surface and the lower surface of the housing (110).

Description

TECHNICAL FIELD

[0001] The present application relates to an uninterruptible power supply device. BACKGROUND

[0002] In Japanese Patent Application Publication No. 2010-98865 (Patent Literature 1), a power conversion device tray is disclosed, in which a plurality of functional units are housed in a cubicle-shaped tray main body. The plurality of functional units are arranged in a stacked manner in the tray main body in the up-down direction. An exit for leading out a connection line (power line, control line) connected to the outside is formed in a top plate of the tray main body. A wiring space for passing through the connection line is formed between the functional unit in the tray main body and a side panel of the tray main body.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2010-98865 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In the power conversion device described in Patent Literature 1, it is possible to lead in the wiring from the top plate of the tray main body into the tray main body, but it is not possible to lead in the wiring from the bottom plate of the tray main body into the tray main body. In order to lead in the wiring from the bottom plate, as an option, a structure can be adopted in which a lead-in tray is provided separately from the tray main body and the wiring is connected to a terminal through the lead-in tray. However, in this structure, since the lead-in tray is mounted on the tray main body, the power conversion device can be complicated and large-sized.

[0008] Alternatively, as a structure different from the above-described lead-in tray, a structure can be adopted in which terminals capable of coping with lead-in from both the upper surface and the lower surface are arranged on the back surface of the tray main body, or a structure is adopted in which, as in Patent Literature 1, wiring spaces capable of coping with lead-in from both the upper surface and the lower surface are provided on the side surface of the tray main body. However, in the structure in which the terminals are arranged on the back surface, it is necessary to secure a space for wiring work on the back surface of the tray main body. In the structure in which the wiring spaces are provided, as the number of wirings and the wire diameter increase, the wiring spaces need to be large-sized. As a result, in either structure, there is a problem that the installation area of the power conversion device becomes large.

[0009] The present application has been achieved in order to solve such a technical problem, and has an object to provide an uninterruptible power supply device capable of leading in the wiring from either of the upper surface and the lower surface of a housing in a simple and small-sized structure.

[0010] MEANS FOR SOLVING THE PROBLEMS

[0011] In one embodiment of the present application, an uninterruptible power supply device includes a housing having a rectangular parallelepiped shape; a plurality of units housed in the housing in a stacked manner in the vertical direction; and a fan unit having a plurality of fans arranged side by side on an upper surface of the housing. An opening for leading a wire into the housing is formed in each of the upper and lower surfaces of the housing.

[0012] Effects of Invention

[0013] According to the present application, an uninterruptible power supply device capable of leading a wire into either of the upper and lower surfaces of the housing in a simple and compact structure can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic external view showing a structure example of the uninterruptible power supply device of the present embodiment.

[0015] Figure 2 is a rear view of the uninterruptible power supply device shown in Figure 1 .

[0016] Figure 3 is a circuit block diagram showing a structure of the uninterruptible power supply device.

[0017] Figure 4 is a circuit block diagram showing a structure example of the UPS unit and the bypass unit.

[0018] Figure 5 is a view of the uninterruptible power supply device shown in Figure 1 from above.

[0019] Figure 6 is a view for explaining another example of the arrangement of the fan unit and the opening.

[0020] Figure 7 is a view for explaining another example of the arrangement of the fan unit and the opening.

[0021] Figure 8 is a schematic external view showing a structure example of the uninterruptible power supply device of the present embodiment. DETAILED DESCRIPTION

[0022] Hereinafter, an embodiment of the present application will be explained in detail with reference to the drawings. In addition, the same reference numerals are assigned to the same or equivalent portions in the drawings, and the explanation thereof will not be repeated.

[0023] Figure 1 is a schematic external view showing a structure example of the uninterruptible power supply device of the present embodiment. Figure 2 is a rear view of the uninterruptible power supply device shown in Figure 1 from above. Figure 2The internal structure of the uninterruptible power supply device in a state where the back cover is removed is shown.

[0024] The uninterruptible power supply device 100 of this embodiment supplies electric power to a load (not shown) by alternating-current electric power supplied from an alternating-current power source such as a commercial power source in normal times (normal times). In the case where the alternating-current power source is out of operation, the uninterruptible power supply device 100 supplies electric power to the load by direct-current electric power supplied from an electric storage device (not shown).

[0025] As shown in Figure 1 The uninterruptible power supply device 100 has a housing 110 of a disk shape (a rectangular parallelepiped shape), a plurality of units 10, 20, 30, and a fan unit 120. In the following description, the left-right direction when the housing 110 is viewed from the front side is set as the X-axis direction, the front-rear direction is set as the Y-axis direction, and the up-down direction is set as the Z-axis direction. In addition, the +X direction is a direction in which the right side is advanced in the X-axis direction, and the -X direction is a direction opposite to the +X direction. The +Y direction is a direction in which the back side is oriented from the front side of the uninterruptible power supply device 100, and the -Y direction is a direction opposite to the +Y direction. The +Z direction is a direction in which the upper side is advanced in the Z-axis direction, and the -Z direction is a direction opposite to the +Z direction.

[0026] The housing 110 has an upper surface 110A and a lower surface 110B. The lower surface 110B of the housing 110 is supported by a pair of leg portions 112. The housing 110 houses the plurality of units 10, 20, 30. The housing 110 has an opening portion 111 that is open to the -Y direction and a front cover (not shown) that covers the opening portion 111. The front cover is provided so as to be able to open and close the opening portion 111. A ventilation hole for introducing air outside the housing 110 into the housing 110 is formed in the front cover.

[0027] The plurality of units 10, 20, 30 have a substantially rectangular parallelepiped shape and are stacked at intervals from each other in the Z-axis direction. The plurality of units 10, 20, 30 are inserted into the inside of the housing 110 from the outside of the housing 110 through the opening portion 111. The plurality of units 10, 20, 30 are respectively provided so as to be able to be inserted and pulled out in the Y-axis direction, so that maintenance inspection and replacement with new products become easy.

[0028] The plurality of units 10, 20, 30 include a terminal unit 10, a plurality of UPS (Uninterruptible Power Supply) units 20, and a bypass unit 30. The terminal unit 10 houses a plurality of terminals for connecting the plurality of UPS units 20 and the bypass unit 30 in parallel between an alternating-current power source and a load. The terminal unit 10 is disposed above the plurality of UPS units 20 and the bypass unit 30. The UPS unit 20 corresponds to one embodiment of an "uninterruptible power supply unit". The number of the UPS units 20 is not limited to five. The number of the bypass unit 30 is not limited to one.

[0029] A vent 21 is formed on the front of the UPS unit 20, and a vent 22 is formed on the back. The UPS unit 20 has a built-in fan 23 for drawing air in from the front and exhausting air from the back. A vent 31 is formed on the front of the bypass unit 30, and a vent 32 is formed on the back. The bypass unit 30 has a built-in fan 33 for drawing air in from the front and exhausting air from the back. The structures of the UPS unit 20 and the bypass unit 30 will be described later. The number of fans built into each unit is not limited.

[0030] A fan unit 120 is disposed on the upper surface 110A of the housing 110. The fan unit 120 draws in air from inside the housing 110 and exhausts the drawn-in air to the outside of the housing 110. Thus, air is introduced into the housing 110 through the vents of the front cover, and this introduced air passes through the plurality of units 20, 30, thereby promoting heat dissipation in the plurality of units 20, 30. The heated air passing through the plurality of units 20, 30 is exhausted to the outside of the housing 110.

[0031] The fan unit 120 has multiple fans. These fans are arranged side-by-side on the upper surface 110A of the housing 110. Figure 1 In the example, fan unit 120 has 8 fans, but the number of fans is not limited to 8.

[0032] An opening 114 is also formed on the upper surface 110A of the housing 110. The opening 114 serves as an inlet for introducing the wiring 140 into the interior of the housing 110. The first end of the wiring 140 is connected to a terminal housed in the terminal unit 10 inside the housing 110. Although the second end of the wiring 140 is not shown in the figure, it is connected to an AC power source, a load, and an energy storage device.

[0033] The opening 114 is covered by the cover 115. The wiring 140 passes through the through hole formed in the cover 115 and is introduced into the housing 110. In addition, in order to prevent dust from entering the housing 110, the through hole is blocked by resin or the like while the wiring 140 is in the through state.

[0034] An opening 116 is also formed on the lower surface 110B of the housing 110. Like the opening 114, the opening 116 is used as an inlet for introducing the wiring 140 into the interior of the housing 110. The opening 116 is covered by a cover 117.

[0035] In the uninterruptible power supply device 100 of the present embodiment, an opening portion 114, 116 for introducing the wiring 140 into the housing 110 is formed in the upper surface 110A and the lower surface 110B of the housing 110, respectively. Thereby, either of the case where the wiring 140 is introduced from the upper surface 110A of the housing 110 and the case where the wiring 140 is introduced from the lower surface 110B of the housing 110 can be coped with.

[0036] Figure 1 A configuration example of the case where the wiring 140 is introduced from the upper surface 110A of the housing 110 is shown. In this case, the terminal unit 10 is arranged in the uppermost layer (the side closest to the opening portion 114) among the plurality of units 10, 20, 30. Thereby, the connection of the wiring 140 to the terminals can be made easy. In addition, such arrangement can be realized by dividing and unitizing the components constituting the uninterruptible power supply device 100 by each function.

[0037] Figure 3 is a circuit block diagram showing the configuration of the uninterruptible power supply device 100.

[0038] As shown in Figure 3 , the uninterruptible power supply device 100 is provided with an input terminal T11, a battery terminal T12, an output terminal T13, a plurality of UPS units 20, and a bypass unit 30. The input terminal T11 is connected to the alternating current power supply 1 and receives alternating current power of a commercial alternating current frequency. The output terminal T13 is connected to the load 3. The battery terminal T12 is connected to the battery 2. The battery 2 corresponds to one embodiment of the "power storage device". The plurality of UPS units 20 and the bypass unit 30 are connected in parallel between the input terminal T11 and the output terminal T13. The input terminal T11, the output terminal T13, and the battery terminal T12 are housed in the terminal unit 10.

[0039] Figure 4 is a circuit block diagram showing a configuration example of the UPS unit 20 and the bypass unit 30.

[0040] As shown in Figure 4 , the UPS unit 20 includes an input terminal T1, an output terminal T3, a battery terminal T2, switches S1 to S4, capacitors C1 to C4, reactors L1 to L3, a converter 5, an inverter 6, a bidirectional chopper 7, and a fan 23.

[0041] The terminals T1, T2, T3 are connected to the terminals T11, T12, T13, respectively. The switch S1 and the reactor L1 are connected in series between the input terminal T1 and an input node 5a of the converter 5. The capacitor Cl is connected between a node between the switch S1 and the reactor L1 and a reference voltage line. The switch S1 is normally on, and is turned off, for example, at the time of maintenance of the UPS unit 20. The capacitor Cl and the reactor L1 constitute an AC input filter (low-pass filter) which passes the AC power from the AC power source 1 through the converter 5, while suppressing leakage of a signal of a carrier frequency generated by the converter 5 to the AC power source 1 side.

[0042] The converter 5 converts the AC power from the AC power source 1 into DC power. The capacitor C4 is connected between an output node 5b of the converter 5 and the reference voltage line, to smooth the output voltage of the converter 5. The output node 5b of the converter 5, an input node 6a of the inverter 6, and a first node 7a of the bidirectional chopper 7 are connected to each other. The inverter 6 converts the DC power from the converter 5 or the bidirectional chopper 7 into AC power of a commercial frequency.

[0043] The reactor L2 and the switch S2 are connected in series between an output node 6b of the inverter 6 and the output terminal T3. The capacitor C2 is connected between a node between the reactor L2 and the switch S2 and the reference voltage line. The reactor L2 and the capacitor C2 constitute an AC output filter (low-pass filter) which passes the AC power from the inverter 6 through the load 3, while suppressing leakage of a signal of a carrier frequency generated by the inverter 6 to the load 3 side.

[0044] The switch S2 is turned on in an inverter power supply mode in which the AC power generated by the inverter 6 is supplied to the load 3, and is turned off in a bypass power supply mode in which the AC power from the AC power source 1 is supplied to the load 3 via the bypass unit 30. In addition, the switch S2 is turned off at the time of maintenance or at the time of failure of the UPS unit 20.

[0045] The switch S3 and the reactor L3 are connected in series between the battery terminal T2 and a second node 7b of the bidirectional chopper 7. The capacitor C3 is connected between a node between the switch S3 and the reactor L3 and the reference voltage line. The switch S3 is normally on, and is turned off, for example, at the time of maintenance of the UPS unit 20 or the battery 2. The capacitor C3 and the reactor L3 constitute a low-pass filter which passes DC power, while suppressing leakage of a signal of a carrier frequency generated by the bidirectional chopper 7 to the battery 2 side.

[0046] The bidirectional chopper 7 supplies the DC power generated by the converter 5 to the battery 2 at normal times when the AC power is supplied from the AC power source 1, and supplies the DC power of the battery 2 to the inverter 6 at the time of power failure when the supply of the AC power from the AC power source 1 is stopped.

[0047] The switch S4 is connected between the output terminal T3 and the fan 23. The switch S4 is normally on, and is turned off, for example, at the time of maintenance of the UPS unit 20.

[0048] Here, the operation of the UPS unit 20 will be explained simply. At the time of normal supply of the alternating current from the alternating current power source 1, the alternating current is converted into direct current by the converter 5. The direct current is converted into alternating current by the inverter 6 and supplied to the load 3, and stored in the battery 2 by the bidirectional chopper 7.

[0049] When the supply of the alternating current from the alternating current power source 1 is stopped due to a power failure, the operation of the converter 5 is stopped, and the direct current of the battery 2 is supplied to the inverter 6 by the bidirectional chopper 7, converted into alternating current by the inverter 6, and supplied to the load 3. Therefore, even in the case where a power failure occurs, the operation of the load 3 can be continued during the period in which the direct current is accumulated in the battery 2.

[0050] The bypass unit 30 includes an input terminal T4, an output terminal T5, switches S5, S6, and a fan 33.

[0051] The terminals T4, T5 are connected to the terminals T11, T13, respectively. The switch S5 is connected between the terminals T4, T5. The switch S5 is turned on at the time of the bypass power supply mode, and turned off at the time of the inverter power supply mode.

[0052] The switch S6 is connected between the output terminal T3 and the fan 33. The switch S6 is turned on at the time of the bypass power supply mode, and turned off at the time of the inverter power supply mode.

[0053] As explained above, the uninterruptible power supply device 100 is provided with a plurality of UPS units 20 and bypass units 30 connected in parallel between the alternating current power source 1 and the load 3. Therefore, the number of the UPS units 20 and the bypass units 30 connected in parallel can be adjusted according to the size of the load 3, and as a result, various loads can be coped with easily.

[0054] Further, the components constituting the uninterruptible power supply device 100 are divided into the UPS units 20, the bypass units 30, and the terminal unit 10, and thus the arrangement of the components in the housing 110 can be changed easily by changing the arrangement order in the Z-axis direction of the plurality of units. Thereby, the arrangement of the terminals can be changed easily in conformity with the introduction direction of the wiring 140, and thus either of the introduction of the wiring 140 from the upper surface 110A of the housing 110 and the introduction of the wiring 140 from the lower surface 110B can be coped with easily.

[0055] Figure 5 is a view of the uninterruptible power supply device 100 as viewed from above Figure 1 is a view of the uninterruptible power supply device 100 as viewed from above Figure 5As shown, a fan unit 120 is disposed on the upper surface 110A of the housing 110, and an opening 114 is formed therein. The opening 114 is covered by a cover 115.

[0056] The fan unit 120 has multiple fans 122. The multiple fans 122 are arranged side by side on the upper surface 110A. Each fan 122 has the same size as the fans 23, 33 built into the UPS unit 20 and the bypass unit 30. The number of fans 122 can be appropriately changed according to the airflow required for cooling the multiple units 20, 30.

[0057] exist Figure 5 In this example, the opening 114 is located on the front side, and the eight fans 122 are located on the rear side. By forming the fan unit 120 with multiple fans 122, the constraints on the arrangement of the opening 114 on the upper surface 110A can be reduced.

[0058] Figure 6 This is a diagram illustrating another example of the configuration of the fan unit 120 and the opening 114. Figure 6 The image shows a top view of the uninterruptible power supply device 100. The number of fans 122 included in the fan unit 120 is... Figure 5 same.

[0059] exist Figure 6 In this example, an opening 114 is formed in the central portion of the upper surface 110A of the housing 110. The fan unit is divided into two fan units 120, respectively disposed on the front side and the rear side of the opening 114. Each fan unit 120 includes four fans 122. The number of fans 122 included in the two fan units 120 may not be the same.

[0060] Figure 7 This is a diagram illustrating another example of the configuration of the fan unit 120 and the opening 114. Figure 7 The image shows a top view of the uninterruptible power supply device 100. The number of fans 122 included in the fan unit 120 is... Figure 5 Same. Figure 7 In this example, eight fans 122 are configured on the front side, and the opening 114 is configured on the rear side.

[0061] Here, as a comparative example, consider the case where the fan unit 120 consists of a large fan. In this case, it is required that a large fan be positioned on the upper surface 110A, and that an opening 114 be formed in the periphery of the fan in a manner that avoids the fan. The placement of the opening 114 may be constrained by the position of the fan.

[0062] In contrast, such as Figure 5 to Figure 7As shown, in the present embodiment, the fan unit 120 is configured by a plurality of small fans 122, whereby the degree of freedom in arrangement of the fan unit 120 can be increased while ensuring the amount of air supply required for cooling. As a result, the arrangement of the opening portion 114 is also less restricted, and thus the arrangement position of the opening portion 114 can be appropriately selected in accordance with the installation site of the uninterruptible power supply device 100, the workability of wiring work, and the like.

[0063] Figure 8 is a schematic external view showing an example of the structure of the uninterruptible power supply device of the present embodiment. Figure 8 The uninterruptible power supply device 100 shown in Figure 1 The uninterruptible power supply device 100 shown in Figure 8 An example of the structure when the wiring 140 is introduced from the lower surface 110B of the housing 110 is shown. In this case, the terminal unit 10 is arranged in the lowermost layer (the side closest to the opening portion 116) among the plurality of units 10, 20, 30. Thus, the connection of the wiring 140 to the terminals can be facilitated.

[0064] The opening portion 116 is covered by the cover portion 117. The wiring 140 passes through the through hole formed in the cover portion 117 and is introduced into the housing 110. The first end portion of the wiring 140 is connected to the terminals housed in the terminal unit 10 inside the housing 110. Although not shown, the second end portion of the wiring 140 is connected to the alternating current power source 1, the load 3, the battery 2, and the like. In addition, in order to suppress the intrusion of dust into the housing 110, the through hole is plugged with resin or the like in a state where the wiring 140 passes therethrough.

[0065] Here, if an example of the structure of Figure 1 is compared with an example of the structure of Figure 8 The arrangement order of the plurality of units 10, 20, 30 inside the housing 110 in the Z-axis direction is different. By arranging the terminal unit 10 close to the opening portion that becomes the introduction port of the wiring 140, the uninterruptible power supply device 100 can be electrically connected to the alternating current power source 1, the battery 2, and the load 3 without routing the wiring 140 inside the housing 110.

[0066] In the conventional device structure, for example, a wiring space is provided in the side surface of the housing, whereby the wiring can be introduced from the upper surface and the lower surface of the housing. On the other hand, the device can be large-sized. On the other hand, in the present embodiment, since it is not necessary to provide a wiring space, the housing can be made simple and small-sized.

[0067] It should be understood that the embodiments disclosed herein are illustrative only and not restrictive of the scope of the present application. The scope of the present application is not represented by the above description but by the claims, and is intended to include all modifications within the meaning and range of equivalency of the claims.

[0068] Reference Signs List

[0069] 1 AC power source, 2 battery, 3 load, 10 terminal unit, 20 UPS unit, 30 bypass unit, 100 uninterruptible power supply device, 110 housing, 110A upper surface, 110B lower surface, 112 leg portion, 111, 114, 116 opening portion, 115, 117 cover portion, 120 fan unit, 23, 33, 122 fan, T1, T11 input terminal, T2, T12 battery terminal, T3, T13 output terminal, S1-S6 switch, L1-L3 reactor, C1-C4 capacitor.

Claims

1. An uninterruptible power supply device, comprising: A shell with a rectangular parallelepiped shape; Multiple units having a cuboid shape and stacked in the vertical direction are housed within the housing; as well as The fan unit has multiple fans arranged side-by-side on the upper surface of the housing. Openings are formed on the upper and lower surfaces of the housing, respectively, for introducing wiring into the housing. The plurality of units include: Multiple uninterruptible power supply units; as well as Terminal units are used to connect the plurality of uninterruptible power supply units in parallel between the AC power source and the load. When the wiring is introduced from the opening located on the upper surface of the housing, the terminal unit is disposed on the uppermost layer of the plurality of units. The wiring is connected to the terminal unit via the opening. The terminal unit is positioned close to the opening that serves as the entry point for the wiring. The configuration of the terminal unit can be changed in accordance with the direction of the wiring.

2. An uninterruptible power supply device, comprising: A shell with a rectangular parallelepiped shape; Multiple units having a cuboid shape and stacked in the vertical direction are housed within the housing; as well as The fan unit has multiple fans arranged side-by-side on the upper surface of the housing. Openings are formed on the upper and lower surfaces of the housing, respectively, for introducing wiring into the housing. The plurality of units include: Multiple uninterruptible power supply units; as well as Terminal units are used to connect the plurality of uninterruptible power supply units in parallel between the AC power source and the load. When the wiring is introduced from the opening located on the lower surface of the housing, the terminal unit is disposed at the bottom layer of the plurality of units. The wiring is connected to the terminal unit via the opening. The terminal unit is positioned close to the opening that serves as the entry point for the wiring. The configuration of the terminal unit can be changed in accordance with the direction of the wiring.

3. The uninterruptible power supply device according to claim 1 or 2, The plurality of uninterruptible power supply units each include: The converter converts the AC power supplied from the AC power source into DC power. as well as The inverter, under normal conditions when AC power is supplied from the AC power source, converts the DC power generated by the converter into AC power and supplies it to the load; and during a power outage when AC power is stopped from being supplied from the AC power source, it converts the DC power stored in the energy storage device into AC power and supplies it to the load.

4. The uninterruptible power supply device according to claim 1 or 2, The plurality of uninterruptible power supply units each include: The front and back sides are formed with ventilation holes; as well as A fan for drawing in air from the front and expelling air from the rear.

5. The uninterruptible power supply device according to claim 3, The plurality of uninterruptible power supply units each include: The front and back sides are formed with ventilation holes; as well as A fan for drawing in air from the front and expelling air from the rear.

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