Uninterruptible power supply device and uninterruptible power supply system

Abstract

A fan unit (60) is disposed on an upper surface of the frame body (50) and includes a fan, a frame member (66), and a support member. The frame member (66) is disposed so as to surround the outer periphery of an opening portion formed in the upper surface (50A) of the frame body (50). The support member supports the fan above the opening portion in a state of being fixed to the frame member (66). A gap is formed between the lower end of a first surface (66A) of the frame member (66) and the upper surface (50A) of the frame body (50). A first blocking member (70) is connected so as to be slidable in the up-down direction with respect to the first surface (66A) of the frame member (66). The first blocking member (70) is configured to block the gap in a state of abutting against the upper surface (50A) of the frame body (50). At least one second blocking member (90) is configured to be inserted into the inside of the frame member through the gap in a state of being exposed from the gap, and to block the opening portion of the upper surface (50A) of the frame body (50).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an uninterruptible power supply device and an uninterruptible power supply system. BACKGROUND

[0002] An uninterruptible power supply device having a fan for discharging heat generated inside a frame to the outside is disclosed in Japanese Patent Application Publication No. 11-215734 (Patent Literature 1). In Patent Literature 1, the fan is mounted to a panel configured to be separable from the frame. The panel is fixed to the frame by screws. In the above-described structure, when the fan is replaced, the panel is detached from the frame by detaching the screws while supporting the panel. Thereafter, the replacement fan is fixed to the frame by screws.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 11-215734 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In the uninterruptible power supply device described in Patent Literature 1, when the fan is replaced, the inside of the frame is exposed due to detachment of the panel. In such a situation, it is possible that components such as screws detached from the panel fall into the inside of the frame. In addition, in Patent Literature 1, since the replacement of the fan is performed while the operation of the inverter is continued, the wiring components housed in the frame are in an electrified state when the panel is detached. Therefore, the worker is required to perform work in a situation in which the worker approaches the electrified wiring components. In such a case, the worker needs to perform work while paying attention not to come into contact with the wiring components, and thus it is possible that workability is reduced.

[0008] The present disclosure is proposed in order to solve such a problem, and an object of the present invention is to provide an uninterruptible power supply device capable of preventing components from falling into a frame and making work of detaching a fan from the frame easy.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] According to one aspect of the present disclosure, an uninterruptible power supply device has a housing having a rectangular parallelepiped shape, a plurality of electrical units housed in the housing, and a fan unit disposed on an upper surface of the housing. An opening portion is formed in the upper surface of the housing. The fan unit includes a fan, a frame member, and a support member. The frame member is disposed on the upper surface of the housing in a manner to surround a periphery of the opening portion, and has a rectangular outer shape. The support member supports the fan above the opening portion in a state of being fixed to the frame member. A gap is formed between a lower end of a first surface of the frame member and the upper surface of the housing. The uninterruptible power supply device further has a first blocking member and at least one second blocking member. The first blocking member is slidably connected to the first surface of the frame member in a vertical direction. The first blocking member is configured to block the gap in a state of abutting against the upper surface of the housing. The at least one second blocking member is configured to be inserted into an inside of the frame member through the gap to block the opening portion in a state where the first blocking member is slid upward to expose the gap.

[0011] Inventive Effects

[0012] According to the present disclosure, an uninterruptible power supply device can be provided, which can prevent components from falling into a housing and can facilitate work of detaching a fan from the housing. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is an appearance view showing a structure example of an uninterruptible power supply system of an embodiment.

[0014] Figure 2 is a circuit block diagram showing a structure of an uninterruptible power supply system.

[0015] Figure 3 is a circuit block diagram showing a structure example of a UPS module and a bypass module.

[0016] Figure 4 is a schematic appearance view showing a structure of a UPS module.

[0017] Figure 5 is a schematic appearance view showing a structure of a fan unit.

[0018] Figure 6 is a view for explaining a method of detaching a fan.

[0019] Figure 7 is a view for explaining a method of detaching a fan.

[0020] Figure 8 is an appearance view showing a structure example of a blocking plate.

[0021] Figure 9 is a view for explaining a method of detaching a fan.

[0022] Figure 10 is an appearance view showing the inside of the frame member.

[0023] Figure 11 is a view for explaining a method of disassembling the fan. DETAILED DESCRIPTION

[0024] Hereinafter, an embodiment of the present application will be described in detail with reference to the drawings. In addition, the same or similar parts in the drawings are designated by the same reference numerals, and their explanations will not be repeated in principle.

[0025] <Structure of Uninterruptible Power Supply System>

[0026] Figure 1 is an appearance view showing a structure example of the uninterruptible power supply system of the embodiment.

[0027] The uninterruptible power supply system 100 is connected between an alternating current power source (not shown) such as a commercial power source and a load (not shown). The uninterruptible power supply system 100 supplies electric power to the load by alternating current power supplied from the alternating current power source in a normal state (when the alternating current power source is normally operating). In the case where the alternating current power source is out of operation, the uninterruptible power supply system 100 supplies electric power to the load by direct current power supplied from a power storage device (not shown).

[0028] The uninterruptible power supply system 100 is a module type uninterruptible power supply system, and has a plurality of UPS modules 10 and a bypass module 20. The UPS module 10 corresponds to one embodiment of "uninterruptible power supply device". As described below, the uninterruptible power supply system 100 internally constructs a parallel circuit of the UPS modules 10 in a number corresponding to the capacity of the uninterruptible power supply system. In the case where power supply by the uninterruptible power supply system 100 requires N UPS modules 10, redundancy is realized by actually installing (N+1) UPS modules 10, and it is possible to improve the quality of power supply.

[0029] The plurality of UPS modules 10 and the bypass module 20 each have a frame body of a disc shape (cuboid shape). In the following description, a left-right direction (horizontal direction) when the frame body is viewed from the front side will be referred to as an X-axis direction, a front-rear direction will be referred to as a Y-axis direction, and an up-down direction will be referred to as a Z-axis direction. In addition, the +X direction is a direction in which the right side is advanced along 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 advanced from the front side of the uninterruptible power supply system 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 along the Z-axis direction, and the -Z direction is a direction opposite to the +Z direction.

[0030] Figure 2 is a circuit block diagram showing the structure of the uninterruptible power supply system 100.

[0031] AsFigure 2 As shown, the uninterruptible power supply system 100 has an input terminal T11, a battery terminal T12, an output terminal T13, multiple UPS modules 10, a bypass module 20, a maintenance bypass circuit 30, and switches S7 to S9.

[0032] Input terminal T11 is connected to AC power source 1 to receive AC power at commercial AC frequency. Output terminal T13 is connected to load 3. Battery terminal T12 is connected to battery 2. Battery 2 corresponds to one embodiment of an energy storage device. A capacitor can be connected to battery terminal T12 instead of battery 2.

[0033] Multiple UPS modules 10 and bypass modules 20 are connected in parallel between the input terminal T11 and the output terminal T13. Figure 3 This is a circuit block diagram illustrating a structural example of UPS module 10 and bypass module 20.

[0034] like Figure 3 As shown, the UPS module 10 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 62.

[0035] Terminals T1, T2, and T3 are connected to terminals T11, T12, and T13, respectively. Switch S1 and reactor L1 are connected in series between input terminal T1 and input node 5a of converter 5. Capacitor C1 is connected between the node between switch S1 and reactor L1 and the reference voltage line. Switch S1 is normally closed, but is opened during maintenance checks or malfunctions of UPS module 10. Capacitor C1 and reactor L1 constitute an AC input filter (low-pass filter) that allows AC power from AC power source 1 to pass through converter 5, suppressing leakage of the carrier frequency signal generated by converter 5 to the AC power source 1 side.

[0036] Converter 5 converts AC power from AC power source 1 into DC power. Capacitor C4 is connected between the output node 5b of converter 5 and the reference voltage line to smooth the output voltage of converter 5. The output node 5b of converter 5, the input node 6a of inverter 6, and the first node 7a of bidirectional chopper 7 are connected to each other. Inverter 6 converts DC power from converter 5 or bidirectional chopper 7 into AC power at commercial frequency.

[0037] An inductor L2 and a switch S2 are connected in series between an output node 6b of the inverter 6 and an output terminal T3. A capacitor C2 is connected between a node between the inductor L2 and the switch S2 and a line of a reference voltage. The inductor L2 and the capacitor C2 constitute an AC output filter (low-pass filter) that passes AC power from the inverter 6 through the load 3 and suppresses leakage of a signal of a carrier frequency generated by the inverter 6 to the load 3 side.

[0038] The switch S2 is turned on in an "inverter power supply mode" in which AC power generated by the inverter 6 is supplied to the load 3, and turned off in a "bypass power supply mode" in which AC power from the AC power source 1 is supplied to the load 3 via the bypass module 20. In addition, the switch S2 is turned off at the time of maintenance inspection of the UPS module 10 or at the time of failure.

[0039] A switch S3 and an inductor L3 are connected in series between the battery terminal T2 and a second node 7b of the bidirectional chopper 7. A capacitor C3 is connected between a node between the switch S3 and the inductor L3 and a line of a reference voltage. The switch S3 is turned on in a normal state and turned off, for example, at the time of maintenance inspection of the UPS module 10 or the battery 2. The capacitor C3 and the inductor L3 constitute a low-pass filter that passes DC power and suppresses leakage of a signal of a carrier frequency generated by the bidirectional chopper 7 to the battery 2 side.

[0040] The bidirectional chopper 7 supplies DC power generated by the converter 5 to the battery 2 in a normal state in which AC power is supplied from the AC power source 1, and supplies DC power of the battery 2 to the inverter 6 at the time of a power failure in which supply of AC power from the AC power source 1 is stopped.

[0041] A switch S4 is connected between the output terminal T3 and the fan 62. The switch S4 is turned on in a normal state and turned off, for example, at the time of maintenance inspection of the UPS module 10.

[0042] Here, the operation of the UPS module 10 is briefly described. In a normal state in which AC power is supplied from the AC power source 1, the AC power is converted into DC power by the converter 5. The DC power is converted into AC power by the inverter 6 and supplied to the load 3, and stored to the battery 2 by the bidirectional chopper 7.

[0043] If a power failure occurs and supply of AC power from the AC power source 1 is stopped, the operation of the converter 5 is stopped, DC power of the battery 2 is supplied to the inverter 6 by the bidirectional chopper 7, and converted into AC power 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 a period in which DC power is stored in the battery 2.

[0044] The bypass module 20 includes an input terminal T4, an output terminal T5, and a switch S5. 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 in the bypass power supply mode and turned off in the inverter power supply mode.

[0045] As described above, the uninterruptible power supply system 100 has a plurality of UPS modules 10 and the bypass module 20 connected in parallel between the alternating current power source 1 and the load 3. Therefore, the number of the UPS modules 10 and the bypass module 20 connected in parallel can be adjusted according to the size of the load 3, and as a result, various loads can be easily coped with.

[0046] The switch S7 is connected between the input terminal T11 and the input terminals T1, T4. The switch S8 is connected between the battery terminal T12 and the battery terminal T2. The switch S9 is connected between the output terminals T3, T5 and the output terminal T13. The switches S7-S9 are turned on in a normal state and turned off, for example, at the time of maintenance inspection of the uninterruptible power supply system 100.

[0047] The maintenance bypass circuit 30 includes an input terminal T6, an output terminal T7, and a switch S6. The terminals T6, T7 are connected to the terminals T11, T13, respectively. The switch S6 is connected between the terminals T6, T7. The switch S6 is turned off in a normal state and turned on, for example, at the time of maintenance inspection of the uninterruptible power supply system 100. In addition, although omitted from the illustration, the maintenance bypass circuit 30 is mounted as a peripheral device on the uninterruptible power supply system 100 shown in FIG. 1. Figure 1

[0048] <Structure of UPS module 10>

[0049] Next, the structure of the UPS module 10 will be described with reference to Figure 4 The structure of the UPS module 10 will be described.

[0050] Figure 4 is a schematic external view showing the structure of the UPS module 10.

[0051] As shown in Figure 4 , the UPS module 10 has a frame 50 of a disk shape (cuboid shape), a plurality of bus bars 54, and a fan unit 60. The frame 50 houses a plurality of electrical units such as the power converter, the capacitor, the reactor, and the wiring member shown in Figure 3 , which constitute the UPS module 10. Although the illustration is omitted, a part of the electrical units has a substantially cuboid shape and is stacked at intervals from each other in the Z-axis direction.

[0052] The plurality of bus bars 54 are connected to the terminals T1, T2, T3( Figure 3 ​) are drawn out to the outside of the frame 50 from the side surface in the X-axis direction (left-right direction) of the frame 50. The plurality of bus bars 54 are electrically connected to the plurality of bus bars 54 provided in other UPS modules 10 and a bypass module 20 (not shown).

[0053] An air vent hole 52 for introducing air from the outside of the frame 50 into the frame 50 is formed in the front surface of the frame 50. An opening portion (not shown) for discharging air in the frame 50 to the outside of the frame is formed in the upper surface 50A of the frame 50.

[0054] A fan unit 60 is disposed on the upper surface 50A of the frame 50. The fan unit 60 has a fan 62. The fan 62 is configured to suck air in the frame 50 through the opening portion 55 (refer to Figure 7 ) formed in the upper surface 50A of the frame 50 and discharge the sucked air to the outside of the frame 50. Thereby, air is introduced into the frame 50 through the air vent hole 52 of the front surface of the frame 50, and the introduced air passes through each of the electrical units, thereby promoting heat dissipation of each of the electrical units. Air that has increased in temperature by passing through the plurality of electrical units is discharged to the outside of the frame 50 by the fan 62 through the opening portion 55 (refer to Figure 7 ) of the upper surface 50A of the frame 50. In the example of Figure 4 , the fan unit 60 has one fan 62, but the number of fans 62 is not limited to one. For example, it can be configured to arrange a plurality of small fans on the upper surface 50A of the frame 50.

[0055] Structure of the fan unit 60

[0056] In the above-described UPS module 10, when the fan 62 is maintained and inspected or replaced with a new one, the fan 62 is detached from the frame 50. As a method of detaching the fan from the frame, for example, a structure is disclosed in Patent Literature 1 in which a panel on which the fan is fixed is fixed to the frame of the uninterruptible power supply device by a screw, and the panel is detached from the frame by detaching the screw while supporting the panel.

[0057] However, as shown in Figure 4 , in the configuration in which the fan unit 60 is mounted on the upper surface 50A of the frame 50, when the fan unit 60 is detached, if the fastening member 65 for fixing the fan unit 60 to the upper surface 50A is detached, the detached fastening member 65 can erroneously fall into the inside of the frame 50 from the opening portion 55 (refer to Figure 7 ) provided in the upper surface 50A of the frame 50.

[0058] Further, by detaching the fan unit 60, the electrical units such as the bus bar 54 are exposed from the opening 55 of the upper surface 50A of the frame 50. Therefore, in the use of the uninterruptible power supply system 100, the worker is required to perform the work in the state of approaching the electrical units to which the voltage is applied. In such a case, the worker needs to perform the work while paying attention not to come into contact with the electrical units, and thus there is a possibility that the workability is reduced.

[0059] Further, as a countermeasure against the falling of the fastening member 65 into the inside of the frame 50, a structure in which the opening 55 of the upper surface 50A of the frame 50 is covered with a screen is considered. However, the falling of the fastening member 65 is avoided by covering the opening 55 with the screen, but there is a possibility that the ventilation is hindered due to the screen, and thus the cooling performance of the electrical units is reduced.

[0060] Here, as described above, the uninterruptible power supply system 100 is a modular uninterruptible power supply system, and thus in the use of the uninterruptible power supply system 100, a part of the UPS modules 10 can be brought out of service for maintenance inspection or replacement. Therefore, in the work of maintenance inspection or replacement of the fan unit 60, it is also possible to consider that the corresponding UPS module 10 is brought out of service, and thus the electrical units are brought to the state in which the voltage is not applied.

[0061] However, as described above, since the bus bar 54 is electrically connected to the bus bars of the other UPS modules 10 and the bypass module 20, in order to bring the bus bar 54 to the state in which the voltage is not applied, the operation of the entire parallel circuit of the plurality of UPS modules 10 and the bypass module 20 needs to be stopped, not only the corresponding UPS module 10.

[0062] In this case, during the operation stop of the parallel circuit of the plurality of UPS modules 10 and the bypass module 20, the switches S7, S9 are opened, and the switch S6 of the maintenance bypass circuit 30 is closed, and thus the uninterruptible power supply system 100 can continue the power supply to the load 3 using the maintenance bypass circuit 30. However, the electric power from the alternating current power supply 1 is directly supplied to the load 3 via the switch S6, and thus there is a possibility that the power supply reliability is temporarily impaired.

[0063] In the present embodiment, the structure of a new fan unit 60 capable of eliminating such a concern is described. Further, the detachment method of the fan 62 at the fan unit 60 is described.

[0064] Figure 5 is a schematic external view showing the structure of the fan unit 60. As shown in Figure 5 , the fan unit 60 has the fan 62, the support member 64, the frame member 66, the terminal block case 68, and the blocking plate 70.

[0065] The support member 64 is formed into a flat plate with a rectangular shape when viewed from above, and a fan 62 is fixed to the opening formed in the central part of it.

[0066] The frame member 66 has a rectangular shape when viewed from above and is configured to support the outer periphery of the support member 64. The four corners of the support member 64 are fastened to the frame member 66 by fasteners 65 such as screws. The support member 64 is configured such that, when fixed to the frame member 66, an opening 55 (see reference) is formed on the upper surface 50A of the frame body 50. Figure 7 The fan 62 is supported above the fan.

[0067] Terminal block housing 68 houses the terminal block used to supply power to fan 62. Terminal block housing 68 is mounted on the front surface 66A of the four sides constituting the outer shape of frame member 66. Front surface 66A corresponds to one embodiment of "first surface".

[0068] The frame member 66 is fixed to the upper surface 50A of the frame body 50. The frame members 66 are disposed in a tight-fitting manner on the upper surface 50A of the frame body 50 in a way that prevents air leakage. However, a gap 80 is formed between the front surface 66A of the frame member 66 and the upper surface 50A of the frame body 50 (see reference). Figure 6 The gap 80 extends along the X-axis.

[0069] The sealing plate 70 is configured to seal the gap 80 formed between the front surface 66A of the frame member 66 and the upper surface 50A of the frame body 50. The sealing plate 70 corresponds to one embodiment of the "first sealing member". Specifically, the sealing plate 70 is made of a rectangular thin plate with its long side extending in the X-axis direction. A slit 72 extending in the Z-axis direction (vertical direction) is formed on the sealing plate 70. The number of slits 72 can be single or multiple.

[0070] The portion of the sealing plate 70 located at the slit 72 is secured to the front surface 66A of the frame member 66 by fasteners such as screws (not shown). Furthermore, by loosening these fasteners, the sealing plate 70 can slide along the slit 72 in the Z-axis direction on the front surface 66A of the frame member 66.

[0071] exist Figure 5 The diagram shows the sealing plate 70 sliding in the -Z axis direction (downward direction). The lower end of the sealing plate 70 abuts against the upper surface 50A of the frame 50, thereby sealing the gap 80. Conversely, by sliding the sealing plate 70 in the +Z axis direction (upward direction), the gap 80 is exposed (see reference). Figure 6 Normally, the gap 80 is blocked by the sealing plate 70. As described below, when the fan 62 is removed, the sealing plate 70 slides in the +Z axis direction, exposing the gap 80.

[0072] The sealing plate 70 has finned portions 74 that protrude vertically (in the -Y-axis direction) relative to the front surface 66A of the frame member 66. The finned portions 74 are formed by bending the end of the sealing plate 70 in the -Z-axis direction at a right angle relative to the front surface 66A. The finned portions 74 are flat plates extending in the X-axis direction (left-right direction). A plurality of through holes 76 are formed at intervals along the X-axis direction in the finned portions 74. Each through hole 76 extends in the thickness direction of the flat plate. Although not shown in the figure, each of the plurality of through holes 76 has a guide screw inserted into it.

[0073] An inlet 58 is formed on the upper surface 50A of the frame 50 for introducing a wiring component (not shown) into the interior of the frame 50. The wiring component is connected to a terminal housed inside the frame 50. The inlet 58 is covered by a cover 56. The wiring component is introduced into the frame 50 through a through hole formed in the cover 56. Furthermore, to prevent dust from entering the frame 50, the through hole is sealed with resin or the like while the wiring component is through. Figure 5 In this example, the inlet 58 is positioned on the upper surface 50A of the frame 50, closer to the front of the fan unit 60.

[0074] <How to disassemble Fan 62>

[0075] Next, disassemble Figure 5 The method of fan 62 at fan unit 60 shown will be explained. The operator can perform the following steps sequentially. Figure 6 , Figure 7 , Figure 9 as well as Figure 11 The process shown involves removing the fan 62 from the frame component 66. Furthermore, before removing the fan 62, the operation of the corresponding UPS module 10 is stopped, and the UPS module 10 is disconnected from the uninterruptible power supply system 100 by disconnecting the switches S1-S3 inside the UPS module 10.

[0076] First, refer to Figure 6 Loosen the fastening component (screw, etc.) inserted into the slit 72. The sealing plate 70 is secured to the front surface 66A of the frame member 66 by this fastening component. By loosening the fastening component, the sealing plate 70 is released from its fixation to the frame member 66. In this state, the sealing plate 70 slides along the slit 72 in the +Z axis direction (upward direction). As a result, the gap 80 between the front surface 66A of the frame member 66 and the upper surface 50A of the frame body 50 is exposed.

[0077] Next, as Figure 7 As shown, a sealing plate 90 is inserted into the interior of the frame component 66 through the exposed gap 80. Figure 7 (A) to Figure 7 (C) shows the sequence of inserting a sealing plate 90 into the interior of the frame component 66.

[0078] In addition, actually, the insertion of the blocking plate 90 is performed in a state where the fan 62 is fixed to the frame member 66, but in order to facilitate the explanation, the illustration of the fan 62 is omitted in Figure 7 , Figure 9 and Figure 11 . Further, in each drawing, the inlet 58 is illustrated, but the illustration of the wiring member and the cover 56 is omitted.

[0079] The blocking plate 90 is a member for blocking the opening portion 55 formed in the upper surface 50A of the frame body 50. The blocking plate 90 corresponds to one embodiment of the "second blocking member". Figure 8 is an appearance view showing a structural example of the blocking plate 90. As Figure 8 indicated, the blocking plate 90 has a blocking portion 92, a guide portion 94, and a handle portion 96.

[0080] The blocking portion 92 is formed of a thin plate having a rectangular shape. The thickness of the blocking portion 92 is shorter than the width in the Z-axis direction (the up-and-down direction) of the gap 80.

[0081] The guide portion 94 is provided to the first end portion 92A in the longitudinal direction of the blocking portion 92. The guide groove 95 is formed in the guide portion 94. As described below, the guide groove 95 has a function of guiding the guide screw inserted into the fin portion 74 of the blocking plate 70. The guide groove 95 is formed so as to extend in a direction perpendicular to the extending direction of the blocking portion 92. The handle portion 96 for the worker to hold is connected to the guide portion 94.

[0082] Returning to Figure 7 (A), in a state where the handle portion 96 is held, the blocking portion 92 of the blocking plate 90 is inserted into the gap 80. The blocking portion 92 is moved toward the +Y-axis direction (the direction toward the back surface). As shown in Figure 7 (B), the movement of the blocking portion 92 toward the +Y-axis direction is restricted by the stop member 67 provided to the inner circumferential surface of the frame member 66. Thereby, a part of the opening portion 55 of the upper surface 50A of the frame body 50 is blocked by the blocking portion 92.

[0083] At this time, the guide portion 94 of the blocking plate 90 is sandwiched in the Z-axis direction (the up-and-down direction) by the fin portion 74 of the blocking plate 70 and the upper surface 50A of the frame body 50. The shaft portion of the guide screw inserted into the through-hole 76 of the fin portion 74 is inserted into the guide groove 95 provided to the guide portion 94.

[0084] Next, as shown in Figure 7(C) shown in FIG. 9, the closure plate 90 is moved in the +X-axis direction (right direction) in a manner that the closure portion 92 of the closure plate 90 abuts against the end portion of the gap 80 in the +X-axis direction. At this time, the direction in which the closure plate 90 is moved is restricted in the X-axis direction by the guide screw of the guide groove 95 of the insertion guide portion 94.

[0085] Specifically, if the closure plate 90 is moved in the +X-axis direction, the shaft portions of the plurality of guide screws arranged at intervals in the X-axis direction are sequentially inserted into the guide groove 95 of the insertion guide portion 94. Each guide screw moves the guide groove 95 in the -X-axis direction (left direction). Thus, the direction in which the closure plate 90 is moved is restricted in the X-axis direction. Thereby, the closure plate 90 can be inhibited from moving in the Y-axis direction (front-rear direction).

[0086] In Figure 7 (C), if the first piece of the closure plate 90 abuts against the end portion of the gap 80 in the +X-axis direction, then the second piece of the closure plate 90 is inserted into the gap 80. The second piece of the closure plate 90 is moved in the +X-axis direction (right direction) in a manner that the closure portion 92 of the second piece of the closure plate 90 abuts against the closure portion 92 of the first piece of the closure plate 90 while holding the handle portion 96. At this time, similarly to the first piece of the closure plate 90, the direction in which the second piece of the closure plate 90 is moved is restricted in the X-axis direction.

[0087] In this way, by sequentially inserting the plurality of closure plates 90 and making them abut against the closure plates 90 adjacent in the X-axis direction, the entire opening portion 55 of the upper surface 50A of the frame body 50 is closed. In Figure 9 An example in which the entire opening portion 55 of the upper surface 50A of the frame body 50 is closed is shown in FIG. 10. In Figure 9 In the example shown in FIG. 9, by arranging three pieces of the closure plate 90 in the X-axis direction, the opening portion 55 is closed. Note that the number of pieces of the closure plate 90 is not limited. That is, the number of pieces of the closure plate 90 can be one or more.

[0088] As in the present embodiment, for the structure in which the insertion port 58 is arranged in front of the gap 80, since the wiring member exists in front of the gap 80, it is difficult to insert a single closure plate into the gap 80 to close the entire opening portion 55 at once. Therefore, the structure is configured to substantially divide a single closure plate into a plurality of closure plates 90, sequentially insert the divided closure plates 90 into the gap 80, and move the closure plates 90 in the +X-axis direction, thereby closing the entire opening portion 55 by the plurality of closure plates 90. Note that the number of pieces of the closure plate 90 and the direction in which each closure plate 90 is moved are not limited to the structure shown in FIG. 9, and can be appropriately changed according to the arrangement position of the insertion port 58 and the like. Figure 7

[0089] ​However, in this configuration, if the blocking plate 90 is moved in the X-axis direction (left-right direction), there is a possibility that the blocking plate 90 also moves in the Y-axis direction (front-rear direction). As a result, a part of the opening portion 55 can be exposed without being blocked by the blocking plate 90. The guide groove 95 of the guide portion 94 and the guide screw of the fin portion 74 function to suppress such movement of the blocking plate 90 in the Y-axis direction. Thus, the opening portion 55 can be completely blocked.

[0090] Figure 10 is an appearance view showing the inside of the frame member 66. As shown in Figure 10 (A) of the same, the locking member 67 is provided on the inner peripheral surface of the frame member 66 in a manner to oppose the gap 80. The locking member 67 extends in the X-axis direction (left-right direction). As described above, the locking member 67 restricts movement of the blocking portion 92 in the +Y-axis direction.

[0091] In Figure 10 (B), a part including the locking member 67 is shown in an enlarged manner. As shown in Figure 10 (B), the locking member 67 is configured to cover the second end portion 92B of the blocking portion 92 in the longitudinal direction. In a state where the second end portion 92B of the blocking portion 92 is locked by the locking member 67, the second end portion 92B is sandwiched by the locking member 67 in the Z-axis direction (up-down direction). Thus, it is possible to suppress floating of the second end portion 92B of the blocking portion 92.

[0092] In the above order, if the opening portion 55 of the upper surface 50A of the frame body 50 is blocked by the plurality of blocking plates 90, then the operation of detaching the fan 62 from the frame member 66 is performed. In this operation, as shown in Figure 11 , first, the cover portion 68A of the terminal plate box 68 is opened, and the fan 62 is electrically separated from the terminal plate 69.

[0093] Next, the fastening member 65 disposed at the four corners of the support member 64 that supports the fan 62 is detached from the support member 64. Thus, the fixation of the support member 64 to the frame member 66 is released, and the support member 64 can be separated from the frame member 66. Thus, the fan 62 can be detached from the fan unit 60 to perform maintenance inspection or replacement.

[0094] Further, after the maintenance inspection or replacement of the fan 62 is performed, the support member 64 is fixed to the frame member 66 again in an order opposite to the above order, and thus the UPS module 10 returns to the original state shown in Figure 5 . Specifically, first, the support member 64 is fixed to the frame member 66 by the fastening member 65, and the fan 62 is connected to the terminal plate 69. Next, the terminal plate 69 is connected to the terminal plate box 68, and the cover portion 68A of the terminal plate box 68 is closed. Figure 7The plurality of blocking plates 90 are pulled out from the gap 80 one by one in the reverse order of the order shown. Thereby, the opening portion 55 of the upper surface 50A of the frame body 50 is opened again. Finally, the blocking plate 70 is slid in the -Z axis direction (downward direction) along the front surface 66A of the frame member 66, thereby blocking the gap 80.

[0095] <Effects>

[0096] Next, the effects of the uninterruptible power supply system 100 of the present embodiment will be described.

[0097] According to the uninterruptible power supply system 100 of the present embodiment, the work of detaching the fan 62 from the fan unit 60 (refer to Figure 11 ) is performed in a state where the opening portion 55 of the upper surface 50A of the frame body 50 is blocked by the plurality of blocking plates 90. Therefore, it is possible to avoid that the member such as the fastening member 65 detached from the support member 64 falls into the inside of the frame body 50 by mistake.

[0098] In addition, since the electrical unit including the bus bar 54 housed into the frame body 50 from the opening portion 55 of the upper surface 50A of the frame body 50 is not exposed, it is possible to perform the work of detaching and mounting the fan 62 in a state where the electrical unit is completely separated. Therefore, for the worker, it is not necessary to pay attention to the contact with the electrical unit, and thus it is possible to make the work of maintenance inspection and replacement of the fan 62 easy.

[0099] Furthermore, even in a state where a voltage is applied to the bus bar 54 (charged state), it is possible to perform the work of detaching and mounting the fan 62, and thus in the work, it is possible to continue the power supply by the other UPS modules 10 while only the corresponding UPS module 10 is taken out of operation. Thereby, compared with a structure in which the operation of the plurality of UPS modules 10 and the bypass module 20 is stopped and the maintenance bypass circuit 30 is used to supply power to the load 3, it is possible to improve the power supply reliability.

[0100] <Other Structural Examples>

[0101] (1) In the above-described embodiment, a structure in which, in the fan unit 60, the gap 80 is formed between the front surface 66A of the frame member 66 and the upper surface 50A of the frame body 50, and the blocking plate 90 is inserted into the gap 80 from the front side of the frame body 50 is described, but the position where the gap 80 is formed is not limited thereto. For example, it can be configured as a structure in which the gap 80 is formed between the back surface of the frame member 66 and the upper surface 50A of the frame body 50. In this case, the blocking plate 70 is provided on the back surface of the frame member 66 and is configured to be slidable in the Z axis direction (up-down direction) in a manner of blocking the gap 80. The blocking plate 90 is inserted into the inside of the frame member 66 from the back side of the frame body 50 through the gap 80.

[0102] (2) In the above-described embodiment, the structure in which the plurality of blocking plates 90 are used to block the opening portions 55 of the upper surface 50A of the frame body 50 is described, but for a structure in which there is no wiring member or the like around the gap 80, a structure in which the opening portions 55 are blocked by one blocking plate 90 can also be provided. In this structure, the blocking plate 90 does not need to be moved in the X-axis direction (left-right direction), and thus the guide groove 95 at the blocking plate 90 and the fin portion 74 and the guide screw at the blocking plate 70 can be omitted.

[0103] (3) In the above-described embodiment, the structure in which the plurality of UPS modules 10 connected in parallel in the module-type uninterruptible power supply system 100 respectively apply the uninterruptible power supply device of the present disclosure is described, but the application of the present disclosure is not limited to the module-type uninterruptible power supply system. Thus, for example, the uninterruptible power supply device of the present disclosure can also be applied to an uninterruptible power supply device constituted by a single frame body.

[0104] It should be considered that the embodiments of the present disclosure are illustrative rather than limiting in all aspects. The technical scope of the present disclosure is not represented by the above description, but is shown by the claims, and is intended to include all modifications within the meaning and range equivalent to the claims.

[0105] Symbol explanation

[0106] 1 AC power supply, 2 battery, 3 load, 5 converter, 6 inverter, 7 bidirectional chopper, 10 UPS module, 20 bypass module, 30 maintenance bypass circuit, 50 frame body, 50A upper surface, 52 vent hole, 54 bus bar, 55 opening portion, 56, 68A cover portion, 58 introduction port, 60 fan unit, 62 fan, 64 support member, 65 fastening member, 66 frame member, 66A front surface, 67 locking member, 68 terminal block case, 69 terminal block, 70, 90 blocking plate, 72 slit, 74 fin portion, 76 through-hole, 80 gap, 92 blocking portion, 94 guide portion, 95 guide groove, 96 handle portion, 100 uninterruptible power supply system, C1-C4 capacitor, L1-L3 reactor, S1-S9 switch, T1, T4, T6, T11 input terminal, T2, T12 battery terminal, T3, T5, T7, T13 output terminal.

Claims

1. An uninterruptible power supply device, comprising: a housing having a rectangular parallelepiped shape; a plurality of electrical units housed in the housing; and a fan unit disposed on an upper surface of the housing, an opening portion is formed in the upper surface of the housing, the fan unit includes: a fan; a frame member disposed on the upper surface of the housing so as to surround a periphery of the opening portion, and having a rectangular outer shape; and a support member supporting the fan above the opening portion in a state of being fixed to the frame member, a gap is formed between a lower end of a first face of the frame member and the upper surface of the housing, the uninterruptible power supply device further comprises: a first blocking member slidably connected to the first face of the frame member in a vertical direction in a state of abutting against the upper surface of the housing, and configured to block the gap; and at least one second blocking member configured to be inserted into an inside of the frame member through the gap and block the opening portion in a state where the first blocking member is slid upward and the gap is exposed.

2. The uninterruptible power supply device according to claim 1, wherein the support member is fixed to the frame member by a fastening member.

3. The uninterruptible power supply device according to claim 1 or 2, wherein the at least one second blocking member includes: a flat plate-shaped blocking portion configured to block at least a portion of the opening portion; and a handle portion provided to a first end portion in an extending direction of the blocking portion, the uninterruptible power supply device further comprises a locking member provided to an inner periphery of the frame member, and gripping a second end portion in the extending direction of the blocking portion.

4. The uninterruptible power supply device according to claim 1 or 2, wherein the at least one second blocking member includes a plurality of second blocking members, the plurality of second blocking members are arranged in an extending direction of the gap, the plurality of second blocking members respectively include: a flat plate-shaped blocking portion configured to block a portion of the opening portion; a guide portion provided to a first end portion in an extending direction of the blocking portion; and a handle portion connected to the guide portion, the first blocking member includes: a flat plate-shaped fin portion protruding in a vertical direction with respect to the first face of the frame member, and formed with a plurality of through holes penetrating in a thickness direction; and a plurality of guide screws respectively inserted into the plurality of through holes, a guide groove for guiding the plurality of guide screws in the extending direction of the gap is formed in the guide portion.

5. The uninterruptible power supply device according to claim 1 or 2, wherein a slit extending in a vertical direction is formed in the first blocking member, the first blocking member is fixed to the first face of the frame member by a fastening member inserted into the slit.

6. An uninterruptible power supply system, comprising: an input terminal supplied with alternating current power from an alternating current power source; an output terminal outputting alternating current power to a load; and a plurality of uninterruptible power supply modules connected in parallel between the input terminal and the output terminal. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The plurality of uninterruptible power supply modules each include the uninterruptible power supply device of any one of claims 1 to 5.

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