Power conversion device and ventilation system

Abstract

The objective is to provide a power conversion device and ventilation system that allow for easy opening and closing of shutters. [Solution] The power converter of the embodiment comprises a pair of housings containing equipment, and a shutter interlocking mechanism that switches the open and closed state of a pair of openings provided on one side of the housings. The shutter interlocking mechanism comprises a pair of shutters that open and close the pair of openings by moving along the one side of the housing, and a single operating member that is operated to move in a crossing direction intersecting the direction of movement of the shutters. As the operating member moves in the crossing direction, the shutter interlocking mechanism switches between a first state in which the first opening of the pair of openings is open and the second opening is closed, and a second state in which the second opening is open and the first opening is closed.

Description

Technical Field

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[0001] Embodiments of the present invention relate to a power conversion device and a ventilation system.

Background Art

[0002] In the air conditioning management of a power conversion device, a configuration is known in which a plurality of power conversion devices are connected to a single air conditioner via a duct and collectively managed. When inspecting one of the power conversion devices whose air conditioning is collectively managed, in order to block the influence of air conditioning on other devices, it is necessary to close the shutter between the duct and the power conversion device to temporarily disconnect the device to be inspected from the air conditioner.

[0003] Particularly in a power conversion device having redundancy, there may be a pair of device bodies that can operate in different states in the operating state and the standby state (during inspection), and the redundancy of the power conversion device is ensured by integrally configuring these device bodies. In such a power conversion device, it is necessary to switch the shutter for each of the device body in the operating state and the device body in the standby state. Therefore, in the conventional power conversion device, the opening and closing operation of the shutter is time-consuming, and there is a risk that the workability during maintenance etc. may decrease.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem to be solved by the present invention is to provide a power conversion device and a ventilation system capable of easily performing the opening and closing operation of a shutter.

Means for Solving the Problems

[0006] The power converter of the embodiment comprises a pair of housings containing equipment, and a shutter interlocking mechanism that switches the open and closed states of a pair of openings provided on one side of the housings. The shutter interlocking mechanism comprises a pair of shutters that open and close the pair of openings by moving along the one side of the housing, and a single operating member that is operated to move in a crossing direction intersecting the direction of movement of the shutters. As the operating member moves in the crossing direction, the shutter interlocking mechanism switches between a first state in which the first opening of the pair of openings is open and the second opening is closed, and a second state in which the second opening is open and the first opening is closed. [Brief explanation of the drawing]

[0007] [Figure 1] External view of a ventilation system having a power conversion device according to an embodiment. [Figure 2] A plan view showing the first state of the power converter according to the embodiment. [Figure 3] A plan view showing the second state of the power converter of the embodiment. [Figure 4] Side view of the power conversion device according to the embodiment. [Figure 5] An enlarged perspective view illustrating the configuration of the shutter interlocking mechanism. [Figure 6] Enlarged view of section VI in Figure 3. [Modes for carrying out the invention]

[0008] The power conversion device 1 of this embodiment will be described below with reference to the drawings. The power conversion device 1 includes, for example, at least one of a converter that converts AC power to DC power and an inverter that converts DC power to AC power. The power conversion device 1 supplies the desired (AC) power to an AC motor, which is an example of a load.

[0009] Examples of the configuration of the power converter 1 are shown in Figures 1 to 4. Figure 1 is an external view of a ventilation system 10 having the power converter 1 of the embodiment. The ventilation system 10 includes a plurality of power converters 1 (three in the example in Figure 1), a duct 8, and a single air conditioning unit 7 that supplies air (e.g., cooling air) to the plurality of power converters 1.

[0010] The basic configuration of each power converter 1 is the same. Therefore, in the following description, only one power converter 1 will be described, and descriptions of other power converters 1 will be omitted, using the same reference numerals as this one power converter 1. In the following description, the surface of the power converter 1 to which the duct 8 is connected will be described as the top surface in the vertical direction. Where necessary, the vertical direction will be described as the Z-axis direction, the direction in which multiple power converters 1 are arranged side by side in the horizontal direction will be described as the Y-axis direction, and the direction perpendicular to the Z-axis and Y-axis will be described as the X-axis direction.

[0011] The power converter 1 has a pair of device bodies 2,2. The pair of device bodies 2,2 are configured to ensure redundancy as a power converter 1, for example, by operating when one device body 2A is stopped due to maintenance or the like, the other device body 2B operates. Each of the pair of device bodies 2,2 is jointly supplied with and shut off cooling air from the air conditioning unit 7 via a duct 8 by a shutter interlocking mechanism 5 located above it.

[0012] The air conditioning unit 7 is provided for each of the multiple power converters 1 and centrally manages the supply of air to the multiple power converters 1. The air conditioning unit 7 supplies regulated air to the multiple power converters 1. The duct 8 connects the air conditioning unit 7 to the pair of main unit bodies 2,2 in the power converter 1, respectively.

[0013] Figure 2 is a plan view showing the first state ST1 of the power converter 1 of the embodiment. Figure 3 is a plan view showing the second state ST2 of the power converter 1 of the embodiment. Figure 4 is a side view of the power converter 1 of the embodiment. Figure 4 is a view taken along arrow IV in Figure 3.

[0014] As shown in Figures 2 to 4, the power conversion device 1 comprises a pair of device bodies 2, 2 and a shutter interlocking mechanism 5. Each pair of device bodies 2,2 consists of a pair of housings 21,22, comprising a first housing 21 and a second housing 22, and a pair of openings 31,32 provided in each housing 21,22. Electrical equipment such as the converters described above are housed inside each housing 21,22. The first housing 21 and the second housing 22 are arranged side by side in the Y-axis direction along the direction in which the multiple power conversion devices 1 are arranged (see Figure 1). The first housing 21 is provided in the +Y-axis direction. The second housing 22 is provided in the -Y-axis direction relative to the first housing 21. On the side of the first housing 21 opposite to the second housing 22, a front door 27 is provided for an operator to access the inside of the first housing 21. An operator refers to, for example, a person who performs inspection or maintenance of the power conversion device 1. Similarly, on the side of the second housing 22 opposite to the first housing 21, a rear door 28 is provided for an operator to access the inside of the second housing 22. As shown in Figure 4, the front door 27 and the rear door 28 are each provided with a retaining member 25 for holding the operating member 50 of the shutter interlocking mechanism 5, which will be described in more detail later. The retaining member 25 extends upward from each door 27, 28.

[0015] As shown in Figures 2 and 3, openings 31 and 32 are provided on the upper surfaces 21a and 22a (one side of the claim) of each housing 21 and 22. In the following description, the opening provided in the first housing 21 may be referred to as the first opening 31, and the opening provided in the second housing 22 may be referred to as the second opening 32. Also, when the first opening 31 and the second opening 32 are not distinguished from each other, they may simply be referred to as openings 31 and 32. Each opening 31 and 32 connects the inside and outside of each housing 21 and 22, respectively. Air supplied from the air conditioning unit 7 via the duct 8 flows into the interior of the housings 21 and 22 through each opening 31 and 32.

[0016] The first opening 31 is provided on one side (-X-axis direction) in the X-axis direction of the upper surface 21a of the first housing 21. The first opening 31 has a size approximately half of the upper surface 21a of the first housing 21. The first opening 31 is formed in a rectangular shape in a plan view seen from above. The second opening 32 is provided on one side (-X-axis direction) in the X-axis direction of the upper surface 22a of the second housing 22. The second opening 32 has the same size as the first opening 31. The second opening 32 is formed in a rectangular shape in a plan view seen from above.

[0017] The shutter interlocking mechanism 5 is provided at the upper part of the pair of housings 21 and 22. The shutter interlocking mechanism 5 switches the open / closed states of the first opening 31 and the second opening 32 provided in the housings 21 and 22. The shutter interlocking mechanism 5 includes shutter covers 47 and 48 provided on the upper surfaces 21a and 22a of the respective housings 21 and 22, a pair of shutters 11 and 12 respectively corresponding to the openings 31 and 32, a single operation member 50 for operating the pair of shutters 11 and 12 simultaneously, first and second guide bars 15 and 16, and a plurality of rollers 51 and 52.

[0018] The shutter cover has a first shutter cover 47 and a second shutter cover 48. The first shutter cover 47 is attached adjacent to the upper surface 21a of the first housing 21. The second shutter cover 48 is attached adjacent to the upper surface 22a of the second housing 22.

[0019] The pair of shutters has a first shutter 11 and a second shutter 12. The first shutter 11 is provided on the upper surface of the first shutter cover 47 (i.e., the upper surface 21a of the first housing 21). The first shutter 11 is provided so as to be movable with respect to the first shutter cover 47. Rails or the like (not shown) for relatively moving the first shutter 11, for example, are provided along the X-axis direction on the first shutter cover 47. Thereby, the first shutter 11 is made movable only in the X-axis direction. The first shutter 11 is formed in a rectangular shape slightly larger than the first opening 31. The first shutter 11 switches between a closed state (see FIG. 3) in which the first opening 31 is covered and an open state (see FIG. 2) in which the first opening 31 is opened by moving along the X-axis direction on the upper surface 21a of the first housing 21.

[0020] The second shutter 12 is provided on the upper surface of the second shutter cover 48 (i.e., the upper surface 22a of the second housing 22). The second shutter 12 is provided so as to be movable with respect to the second shutter cover 48. Rails or the like (not shown) for relatively moving the second shutter 12, for example, are provided along the X-axis direction on the second shutter cover 48. Thereby, the second shutter 12 is made movable only in the X-axis direction. The second shutter 12 is formed in a rectangular shape slightly larger than the second opening 32. The second shutter 12 switches between a closed state (see FIG. 2) in which the second opening 32 is covered and an open state (see FIG. 3) in which the second opening 32 is opened by moving along the X-axis direction on the upper surface 22a of the second housing 22.

[0021] One operating member 50 is provided for the pair of housings 21, 22. The operating member 50 is parallel to the upper surfaces 21a, 22a of the housings 21, 22 and is provided at the central portions of the respective shutter covers 47, 48 in the X-axis direction. The operating member 50 extends along the Y-axis direction (the intersecting direction in the claims). The operating member 50 is operated in a direction intersecting the moving direction of the shutters 11, 12, that is, the Y-axis direction. By the operator moving the operating member 50 along the Y-axis direction, the first shutter 11 and the second shutter 12 can be simultaneously opened and closed. That is, the shutter interlocking mechanism 5 of the present embodiment is a manual duct shutter.

[0022] The shutter interlocking mechanism 5 of this embodiment switches between a first state ST1 (see Figure 2), in which the first opening 31 (one of the openings in the claim) of the pair of openings is opened and the second opening 32 (the other opening in the claim) is closed, and a second state ST2 (see Figure 3), in which the second opening 32 is opened and the first opening 31 is closed, by moving the single operating member 50 in the Y-axis direction. In other words, the shutter interlocking mechanism 5 is configured so that the pair of shutters can be moved simultaneously by operating the operating member 50.

[0023] The following will specifically describe the configuration of the shutter interlocking mechanism 5 for achieving the opening and closing operation of the shutter described above. Figure 5 is an enlarged perspective view illustrating the configuration of the shutter interlocking mechanism 5. Figure 5 shows an enlarged perspective view corresponding to section V in Figure 2. Figure 6 is an enlarged view of section VI in Figure 3. As shown in Figures 3 and 6, a first guide bar 15 is attached to the upper surface of the first shutter 11. In a plan view, the first guide bar 15 extends so as to be inclined with respect to the direction of movement of the first shutter 11 (X-axis direction) and the direction of movement of the operating member 50 (Y-axis direction). As an example, in this embodiment, in a plan view, the first guide bar 15 is positioned in the +Y-axis direction as it moves toward the +X-axis direction and is fixed to the upper surface of the first shutter 11 at an angle inclined at 45° with respect to the X-axis and Y-axis.

[0024] Furthermore, a pair of rollers 51, 51 are provided on the operating member 50 at positions corresponding to the first guide bar 15, so as to clamp the first guide bar 15 from both sides in its thickness direction (width direction perpendicular to the length direction of the guide bar 15 in a plan view). The rotation axis of each roller 51, 51 extends along the Z-axis direction and is attached to the operating member 50 at a predetermined interval in the Y-axis direction. The rotation axes of the rollers 51, 51 are fixed to the operating member 50, and the operating member 50 is movable only in the Y-axis direction. Therefore, as shown by the arrows in Figure 6, when the operating member 50 is moved in the -Y-axis direction, a force in the +X-axis direction is transmitted to the first guide bar 15 by contact between the roller 51 (in this case, the roller 51 on the +Y-axis side) and the first guide bar 15, and the first guide bar 15 and the first shutter 11 fixed thereto move in the +X-axis direction (see also Figure 2). Conversely, when the operating member 50 is moved in the +Y axis direction, a force in the -X axis direction is transmitted to the first guide bar 15 by contact between the roller 51 (in this case, the roller 51 on the -Y axis side) and the first guide bar 15, causing the first guide bar 15 and the first shutter 11 fixed thereto to move in the -X axis direction (see also Figure 3).

[0025] Similarly, as shown in Figures 2 and 5, a second guide bar 16 is attached to the upper surface of the second shutter 12. The second guide bar 16 extends inclined in plan view with respect to the direction of movement of the second shutter 12 (X-axis direction) and the direction of movement of the operating member 50 (Y-axis direction). As an example, in this embodiment, the second guide bar 16 is positioned in the +Y-axis direction as it moves toward the -X-axis direction in plan view, and is fixed to the upper surface of the second shutter 12 at an angle inclined at 45° with respect to the X-axis and Y-axis.

[0026] A pair of rollers 52, 52 are provided on the operating member 50 at a position corresponding to the second guide bar 16, so as to clamp the second guide bar 16 from both sides in its thickness direction (width direction perpendicular to the length direction of the guide bar 16 in a plan view). The rotation axis of each roller 52, 52 extends along the Z-axis direction and is attached to the operating member 50 at a predetermined interval in the Y-axis direction. Therefore, as shown in Figure 2, when the operating member 50 is moved in the -Y-axis direction, a force in the -X-axis direction is transmitted to the second guide bar 16 by contact between the roller 52 (in this case, the roller 52 on the +Y-axis side) and the second guide bar 16, causing the second guide bar 16 and the second shutter 12 fixed thereto to move in the -X-axis direction. Conversely, as shown in Figure 3, when the operating member 50 is moved in the +Y axis direction, a force in the +X axis direction is transmitted to the second guide bar 16 by contact between the roller 52 (in this case, the roller 52 on the -Y axis side) and the second guide bar 16, causing the second guide bar 16 and the second shutter 12 fixed thereto to move in the +X axis direction.

[0027] As shown in Figure 2, the shutter interlocking mechanism 5 of this embodiment can transition to a first state ST1 in which the first opening 31 is open and the second opening 32 is closed by moving a single operating member 50 in the -Y axis direction. Furthermore, as shown in Figure 3, it can transition to a second state ST2 in which the first opening 31 is closed and the second opening 32 is open by moving the single operating member 50 in the +Y axis direction.

[0028] As shown in Figure 4, the operating member 50 is held so as to be movable in the Y-axis direction by a retaining member 25 attached to each door 27, 28 of the power converter 1. The retaining member 25 is connected to each door 27, 28 to restrict the opening of each door 27, 28 provided on the housing. As an example of a configuration to restrict the opening of the doors 27, 28, for example, a predetermined key may be provided on the handle of the operating member 50, and this key may be configured to lock the opening of the door when it approaches the door (retaining member 25). As a result, when the operating member 50 is moved in the -Y-axis direction (first state ST1 shown in Figure 2), the front door 27 cannot be opened and the rear door 28 can be opened. Therefore, maintenance and inspection can be performed by opening the rear door 28 only when the opening 32 of the housing 22 is closed. On the other hand, when the operating member 50 is moved in the +Y-axis direction (second state ST2 shown in Figure 3), the front door 27 can be opened and closed and the rear door 28 cannot be opened. Therefore, only the housing 21 with the opening 31 closed can be opened to perform maintenance and inspection by opening the front door 27. The method of restricting the opening of doors 27 and 28 by the retaining member 25 is not limited to the method described above.

[0029] The power converter 1 may further include a limit switch 61 for detecting the open / closed state of each shutter 11, 12, and a display unit 62 for notifying the operator of the open / closed state of each shutter 11, 12. Examples of the display unit 62 include, for example, an image capable of displaying characters or symbols, or a lamp capable of distinguishing between the first and second states ST2 by differences in color. The method for detecting the open / closed state of the shutters 11 and 12 is not limited to the limit switch 61. The display unit 62 only needs to be able to display the first and second states ST2 to the operator in a way that allows them to distinguish between them, and is not limited to the above-described configuration. Instead of (or in addition to) the display unit 62, a speaker or the like that generates sound may be provided.

[0030] According to this embodiment, the power converter 1 comprises a pair of housings 21 and 22, each having openings 31 and 32, and a shutter interlocking mechanism 5. The shutter interlocking mechanism 5 includes a pair of shutters 11 and 12 that open and close the pair of openings 31 and 32 by moving along the upper surfaces 21a and 22a of the housings 21 and 22, and a single operating member 50 that is operated in a direction intersecting the direction of movement of the shutters 11 and 12. The shutter interlocking mechanism 5 switches between a first state ST1, in which the first opening 31 (one of the openings) is open and the second opening 32 (the other opening) is closed, and a second state ST2, in which the second opening 32 is open and the first opening 31 is closed, as the single operating member 50 moves. As a result, an operator can easily open and close the shutters 11 and 12 of multiple openings 31 and 32 by operating the operating member 50. Therefore, even if the power converter 1 has multiple openings, it is no longer necessary to perform switching work for each shutter, making maintenance of the power converter 1 easier. In addition, this ensures that the standby device body 2 (for example, device body 2B in Figure 1) is reliably isolated from the air conditioning system 7, reducing the influence of air conditioning on other power converters 1. Therefore, a power conversion device 1 can be provided that allows for easy opening and closing of shutters 11 and 12. Furthermore, compared to conventional technology, this reduces the effort required for opening and closing shutters 11 and 12 and improves work efficiency when performing inspection work, etc.

[0031] The shutter interlocking mechanism 5 moves a pair of shutters 11 and 12 simultaneously by moving the operating member 50. This allows for quick switching between the operating device body 2 (device body 2A in Figure 1) and the standby device body 2 (device body 2B in Figure 1). Therefore, the efficiency of tasks such as inspections can be improved.

[0032] The shutter interlocking mechanism 5 comprises guide bars 15 and 16 fixed to the shutters 11 and 12, and a pair of rollers 51 and 52 attached to the operating member 50 and gripping the guide bars 15 and 16. In a plan view, the guide bars 15 and 16 extend so as to be inclined with respect to the direction of movement of the shutters 11 and 12 (X-axis direction) and the direction of movement of the operating member 50 (Y-axis direction), respectively. With this simple configuration of inclined guide bars 15 and 16 and rollers 51 and 52, the force acting on the operating member 50 in the longitudinal direction (Y-axis direction) can be converted by 90° and transmitted to a force along the direction of movement of the shutters 11 and 12 (X-axis direction). Therefore, the opening and closing operation of the shutters 11 and 12 described above can be realized with this simple configuration, and the state of the shutters 11 and 12 (first state ST1 and second state ST2) can be easily switched.

[0033] The housings 21 and 22 have a holding member 25 that movably holds the operating member 50, and the holding member 25 is connected to the doors 27 and 28 provided on the housings 21 and 22 to restrict the opening of the doors 27 and 28. As a result, operation of the operating member 50 is required to open and close the doors 27 and 28, thus preventing accidental operation such as opening the door of the operating device body 2A during maintenance. Thus, the opening and closing of the shutters 11 and 12 can be easily performed, and the safety of the worker can be ensured.

[0034] The power converter 1 further includes a limit switch 61 for detecting the state of shutters 11 and 12, and a display unit 62 for informing the operator of the open / closed state of shutters 11 and 12. This allows the operator to easily know the open / closed state of shutters 11 and 12. Therefore, work efficiency during maintenance can be improved.

[0035] The ventilation system 10 comprises the power converter 1 described above, ducts 8 connected to each of the openings 31 and 32, and a single air conditioning unit 7 connected to the ducts 8 and supplying air to multiple device bodies 2, 2. This allows the air conditioning of multiple power converters 1 to be controlled by a single air conditioning unit 7. Therefore, the size of the ventilation system 10 can be kept down. In addition, since each power converter 1 has the shutter interlocking mechanism 5 described above, even when the air conditioning is controlled by a single air conditioning unit 7, the impact of air conditioning on other power converters 1 during inspection can be kept to a minimum. Therefore, a ventilation system 10 equipped with a power converter 1 that allows for easy opening and closing of shutters 11 and 12 can be provided.

[0036] The embodiments described above are presented as examples only and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents.

[0037] For example, in the above embodiment, the duct 8 was connected to the upper surfaces 21a and 22a of the housing 21 and 22 of the power converter 1, but the invention is not limited to this. For example, the duct 8 may be connected to a side surface of the housing 21 and 22 that is aligned vertically. In this case, the shutter interlocking mechanism 5 may also be provided on this side surface. Instead of rollers 51 and 52, sliding members or the like, formed to reduce the coefficient of friction at the contact point with guide bars 15 and 16, may be used.

[0038] The arrangement of the multiple power converters 1 is not limited to the arrangement in the embodiment described above. The direction in which the first housing 21 and the second housing 22 are arranged is not limited to the embodiment described above. A single power converter 1 may have three or more device bodies 2. [Explanation of Symbols]

[0039] 1...Power converter, 5...Shutter interlocking mechanism, 7...Air conditioning unit, 8...Duct, 10...Ventilation system, 11...First shutter (pair of shutters), 12...Second shutter (pair of shutters), 15...First guide bar (guide bar), 16...Second guide bar (guide bar), 21...First housing (pair of housings), 21a...Top surface (one side) of the first housing, 22...Second housing (pair of housings), 22a...Top surface (one side) of the second housing, 25...Holding member, 27...Front door (door), 28...Rear door (door), 31...First opening (pair of openings, one opening), 32...Second opening (pair of openings, the other opening), 50...Operating member, 51, 52...Pair of rollers, 61...Limit switch, 62...Display unit, ST1...First state, ST2...Second state

Claims

1. A pair of enclosures containing equipment inside, A shutter interlocking mechanism that switches the open / closed state of a pair of openings provided on one side of the housing, Equipped with, The aforementioned shutter interlocking mechanism is A pair of shutters that move along one side of the housing to open and close the pair of openings, A single operating member is operated to move in an intersecting direction that intersects the direction of movement of the shutter, It has, The shutter interlocking mechanism switches between a first state in which the first opening of the pair of openings is open and the second opening is closed, and a second state in which the second opening is open and the first opening is closed, as the operating member moves in the intersecting direction. Power converter.

2. The shutter interlocking mechanism moves a pair of shutters simultaneously. The power conversion device according to claim 1.

3. The aforementioned shutter interlocking mechanism is A guide bar fixed to the shutter, A pair of rollers attached to the operating member and positioned to sandwich the guide bar, Furthermore, The guide bar extends in a plan view so as to be inclined with respect to the direction of movement of the shutter and the direction of movement of the operating member, The power conversion device according to claim 1.

4. The housing has a holding member that movably holds the operating member, The retaining member is connected to the door so as to restrict the opening of the door provided on the housing. The power conversion device according to claim 1.

5. A limit switch for detecting the open / closed state of the shutter, A display unit that shows the open / closed state of the shutter, Furthermore, The power conversion device according to claim 1.

6. A power conversion device according to any one of claims 1 to 5, A duct connected to the opening of the power converter, A single air conditioning unit connected to the aforementioned duct and supplying air to a plurality of the aforementioned power converters, Equipped with, Ventilation system.

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