Power conversion equipment for railway vehicles

Abstract

To provide a power conversion device for a railway vehicle which suppresses cooling function degrading of a heat radiation part caused by a foreign object adhesion and a contamination.SOLUTION: A power conversion device 100 comprises: a power conversion unit 1 (2) which includes a power conversion part body 1a (2a) and a heat radiation part 1b (2a) for dissipating a heat in the power conversion part body 1a (2a); a unit fitting frame 3 to receive the power conversion unit 1 (2); and a sealed housing 10 which is installed in a railway vehicle 101 and stores the unit fitting frame 3 internally. The device is constituted to store the heat radiation part 1b (2a) in the sealed housing 10 by means of storing, in the housing 10, the unit fitting frame 3 in which the power conversion unit 1 (2) that includes a heat radiation part 1b (2a) is stored.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a power converter for railway vehicles, and more particularly to a power converter for railway vehicles configured so that a heat dissipation unit can be housed within a housing. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a power conversion device for a railway vehicle is known in which a heat dissipation unit is configured so as to be able to be housed within a housing (see, for example, Patent Document 1).

[0003] The above-mentioned Patent Document 1 discloses a power converter for railway vehicles, which includes a cooling device including a heat dissipation fin, a bottom plate frame on which the cooling device is placed, an upper frame provided so as to face the bottom plate frame, a side wall connecting the bottom plate frame and the upper frame, and a cooling device mounting frame on which the cooling device is mounted. The cooling device is mounted on the bottom plate frame having an opening at the bottom and attached to the cooling device mounting frame, and is stored in a space (inside the housing) surrounded by the upper frame, the side wall, the bottom plate frame, and the cooling device mounting frame. In addition, a punch hole is provided at the bottom of the cooling device as a passage hole for air to cool the heat dissipation fin of the cooling device. The power converter for railway vehicles described in Patent Document 1 is configured so that air for cooling the heat dissipation fin (heat dissipation section) is supplied from outside the housing to the space (inside the housing) surrounded by the upper frame, the side wall, the bottom plate frame, and the cooling device mounting frame through the punch hole at the bottom of the cooling device and the opening at the bottom of the bottom plate frame (housing) on ​​which the cooling device is placed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-196579 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the electric power converter for railway vehicles of the above-mentioned Patent Document 1, the space (inside the housing) surrounded by the upper frame, the side walls, the bottom plate frame, and the cooling device mounting frame is configured so that air for cooling the heat dissipation fins is supplied from outside the housing through a punch hole in the lower part of the cooling device and an opening in the lower part of the bottom plate frame (housing) on ​​which the cooling device is placed. However, the electric power converter for railway vehicles of the above-mentioned Patent Document 1 has a problem that, when air for cooling the heat dissipation fins is supplied from outside the housing, foreign matter enters from the outside together with the air. Therefore, there is a problem that the cooling function of the heat dissipation fins is reduced by the foreign matter that enters from the outside through the punch hole in the lower part of the cooling device and the opening in the lower part of the bottom plate frame (housing), and foreign matter adheres to and becomes dirty on the heat dissipation fins (heat dissipation section).

[0006] The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to provide a power conversion device for railway vehicles that can suppress a decrease in the cooling function of the heat dissipation section due to the adhesion of foreign matter and dirt. [Means for solving the problem]

[0007] In order to achieve the above object, a power conversion device for a railway vehicle according to one aspect of the present invention includes a power conversion unit including a power conversion section main body and a heat dissipation section for dissipating heat inside the power conversion section main body, a unit accommodating section that accommodates the entire power conversion unit including the heat dissipation section, and a sealed housing that is provided on the railway vehicle and accommodates the unit accommodating section therein. By accommodating the unit accommodating section that accommodates the power conversion unit including the heat dissipation section within the housing, the entire heat dissipation section is Without being exposed to the outside It is configured to be housed in a sealed housing.

[0008] In the power conversion device for railway vehicles according to the above aspect, as described above, the unit housing that houses the power conversion unit including the heat dissipation part is configured to be housed in the housing so that the heat dissipation part can be housed in the sealed housing. By housing the heat dissipation part of the power conversion unit in the sealed housing, it is possible to prevent the intrusion of foreign matter from outside the housing, which causes the adhesion of foreign matter and dirt. As a result, it is possible to suppress the deterioration of the cooling function of the heat dissipation part due to the adhesion of foreign matter and dirt.

[0009] In the power conversion device for railway vehicles according to the above aspect, preferably, the unit accommodating section is configured to be able to accommodate a plurality of power conversion units including a first power conversion unit and a second power conversion unit, the first power conversion unit includes a first heat dissipation section that is a heat dissipation section for dissipating heat inside the power conversion unit main body, and the second power conversion unit includes a second heat dissipation section that is a heat dissipation section for dissipating heat inside the power conversion unit main body. With this configuration, a plurality of power conversion units can be accommodated in the unit accommodating section, so that when the plurality of power conversion units are stored in the housing or when the plurality of power conversion units are removed from the housing, the plurality of power conversion units can be simultaneously stored or removed. As a result, an increase in the amount of work required when storing the plurality of power conversion units in the housing or when removing the plurality of power conversion units from the housing can be suppressed compared to when only one power conversion unit is stored in the unit accommodating section.

[0010] In this case, preferably, the device further includes a cooling fan configured to cool the heat dissipation section by circulating air inside the housing, and the first heat dissipation section and the second heat dissipation section are configured to be cooled by a common cooling fan. With this configuration, the air inside the sealed housing can be circulated by the cooling fan, so that the heat dissipation section can be cooled without taking in outside air. Also, by cooling the first heat dissipation section and the second heat dissipation section with a common cooling fan, an increase in the number of parts can be suppressed compared to a case where a cooling fan is provided corresponding to each of the first heat dissipation section and the second heat dissipation section.

[0011] In the above-mentioned configuration including a cooling fan, the first power conversion unit and the second power conversion unit are preferably configured to be accommodated in the unit accommodation section with the first heat dissipation section and the second heat dissipation section facing each other, and the first heat dissipation section and the second heat dissipation section are arranged to overlap with the cooling fan when viewed from a direction perpendicular to the bottom surface of the housing. With this configuration, the first heat dissipation section and the second heat dissipation section overlap with the cooling fan when viewed from a direction perpendicular to the bottom surface of the housing, so that both the first heat dissipation section and the second heat dissipation section can be easily cooled by cooling air blown from the common cooling fan.

[0012] In the above-mentioned configuration including a cooling fan, the unit accommodating section preferably has a first cooling opening through which the cooling air blown from the cooling fan passes, on the side of the unit accommodating section where the cooling fan is arranged. With this configuration, the first cooling opening through which the cooling air passes allows the cooling air blown from the cooling fan to be directed at the first heat dissipation section and the second heat dissipation section without being blocked by the unit accommodating section. As a result, the first heat dissipation section and the second heat dissipation section can be cooled more efficiently than when the unit accommodating section does not have the first cooling opening.

[0013] In this case, the cooling fan is preferably provided on the bottom side of the housing, the heat dissipation section includes heat dissipation fins, and the unit accommodating section is fastened and fixed to the housing, so that the first heat dissipation section, the first cooling opening, and the cooling fan are arranged to overlap when viewed from a direction perpendicular to the bottom surface of the housing. With this configuration, the unit accommodating section is fastened and fixed to the housing, so that the first heat dissipation section, the first cooling opening, and the cooling fan are arranged to overlap when viewed from a direction perpendicular to the bottom surface of the housing. Therefore, by simply fastening and fixing the unit accommodating section to the housing, the first heat dissipation section can be arranged at a position where the cooling air blown from the cooling fan hits the first heat dissipation section through the first cooling opening. As a result, the first heat dissipation section, the first cooling opening, and the cooling fan can be easily aligned. In addition, the cooling fan is provided on the bottom side of the housing, so that the cooling air can hit the first heat dissipation section and the second heat dissipation section from the bottom side of the housing. This allows air to circulate inside the sealed housing by utilizing the ascending air currents generated by the heat radiated from the first and second heat radiating sections, thereby more efficiently cooling the first and second heat radiating sections. Also, by including the heat radiating fins in the heat radiating section, the heat generating area of ​​the heat radiating section is increased compared to when the heat radiating section does not include heat radiating fins, thereby improving the efficiency of heat dissipation.

[0014] In the above-mentioned configuration in which the cooling fan is provided on the bottom side of the housing, preferably, the electronic device further includes an electronic device unit provided with an electronic device electrically connected to the power conversion unit, and the electronic device unit is arranged in the housing so as to face the cooling fan on the opposite side of the power conversion unit accommodated in the unit housing section, and has a second cooling opening through which the cooling air blown from the cooling fan passes. With this configuration, the electronic device unit has the second cooling opening through which the cooling air passes, so that the cooling air that has cooled the first heat dissipation section and the second heat dissipation section can be applied to the inner wall surface of the upper surface of the housing through the second cooling opening. As a result, even when the electronic device unit is arranged so as to face the cooling fan on the opposite side of the power conversion unit accommodated in the unit housing section in the housing, the heat taken from the first heat dissipation section and the second heat dissipation section by the cooling air can be dissipated from the housing compared to when the electronic device unit does not have the second cooling opening.

[0015] In the power conversion device for railway vehicles according to the above aspect, the unit accommodating section preferably has a shape formed by combining a plurality of frames, and is configured so that the frame portion of the unit accommodating section can be grasped when the power conversion unit is accommodated therein. With this configuration, an operator can grasp the frame portion of the unit accommodating section when the power conversion unit is accommodated therein, making it easier to accommodate the power conversion unit in the housing of the unit accommodating section in which the power conversion unit is accommodated, or to remove the power conversion unit from the housing of the unit accommodating section in which the power conversion unit is accommodated.

[0016] In this case, the unit accommodating section preferably includes a bottom surface portion provided at a position corresponding to the bottom surface of the first power conversion unit, and a support portion provided at a position corresponding to the bottom surface of the second power conversion unit and supporting wiring connected to the second power conversion unit. With this configuration, by supporting the wiring connected to the second power conversion unit with the support portion, it is possible to prevent the wiring connected to the second power conversion unit from being pinched between the housing and the unit accommodating section when storing the unit accommodating section in the housing or removing the unit accommodating section from the housing. Furthermore, by providing the bottom surface portion at a position corresponding to the bottom surface of the first power conversion unit in the unit accommodating section, it is possible to protect the first power conversion unit from impact from the bottom side.

[0017] In the above-mentioned configuration in which the unit accommodating section has a shape in which a plurality of frames are combined, the housing is preferably provided with a slide section for sliding the unit accommodating section housing the power conversion unit while the worker is holding the unit accommodating section inside the housing. With this configuration, the unit accommodating section held by the worker can be easily slid to the installation position of the unit accommodating section inside the housing by sliding the unit accommodating section held by the worker on the slide section.

[0018] In this case, the cooling fan is preferably arranged so as not to overlap with the sliding portion when viewed from a direction perpendicular to the bottom surface of the housing. This configuration can prevent the sliding portion from blocking the cooling air blown from the cooling fan, and therefore, the first heat dissipation portion and the second heat dissipation portion can be cooled more easily than when the cooling fan overlaps with the sliding portion when viewed from a direction perpendicular to the bottom surface of the housing. Effect of the Invention

[0019] According to the present invention, as described above, it is possible to provide a power conversion device for railway vehicles that is capable of suppressing a decrease in the cooling function of a heat dissipation section caused by adhesion of foreign matter and dirt. [Brief description of the drawings]

[0020] [Figure 1] 1 is a diagram showing a railway vehicle equipped with a power conversion device according to an embodiment of the present invention. [Diagram 2] 1 is a front view of a power conversion device provided on the underside of a railcar body according to an embodiment of the present invention. [Diagram 3] 1 is a side view of a power conversion device provided on the underside of a railcar body according to an embodiment of the present invention. [Figure 4] 1 is a top view of a power conversion device provided on the underside of a railcar body according to an embodiment of the present invention. [Diagram 5] 1 is a diagram for explaining the configuration of each part of a power conversion device according to an embodiment of the present invention; [Figure 6] 1 is a perspective view of a power conversion unit according to a power conversion device of an embodiment of the present invention; [Figure 7] FIG. 2 is a top view of the power conversion unit. [Figure 8] FIG. 2 is a rear view of the power conversion unit. [Figure 9] 1 is a perspective view of a unit mounting frame that houses a power conversion unit according to an embodiment of the present invention. [Figure 10] 1 is a perspective view of a unit mounting frame of a power conversion device according to an embodiment of the present invention; [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. [Figure 14] FIG. [Figure 15] FIG. [Figure 16] 10A and 10B are diagrams for explaining attachment of the power conversion unit to the unit mounting frame. [Figure 17] 4 is a side view of a unit mounting frame accommodating a power conversion unit. FIG. [Figure 18]1 is a perspective view showing a configuration of an electronic device unit, a sliding portion, and a cooling fan in a power conversion device according to an embodiment of the present invention; [Figure 19] 11A and 11B are diagrams for explaining the operation of storing and removing the unit mounting frame. [Figure 20] 11A and 11B are diagrams for explaining fastening and fixing of the unit mounting frame to the housing. [Figure 21] 13 is a diagram for explaining fastening of the unit mounting frame to the frame mounting portion of the housing. FIG. [Figure 22] 13 is a diagram for explaining the release of fastening between the unit mounting frame and the frame mounting portion of the housing. FIG. [Diagram 23] 4 is a schematic diagram seen from the side of the housing for explaining the arrangement of a cooling fan and a heat dissipation portion of a power conversion unit within the housing of the power conversion device of one embodiment of the present invention. FIG. [Figure 24] 13 is a schematic diagram seen from the bottom side of the housing to explain the arrangement of a cooling fan, a heat dissipation portion of the power conversion unit, and an opening of the unit mounting frame within the housing. FIG. [Diagram 25] 11 is a schematic diagram illustrating the arrangement of the cooling fans and the openings of the electronic device unit in the housing as viewed from the bottom side of the housing. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0022] 1 to 25, a configuration of a power converter 100 for a railway vehicle 101 according to one embodiment of the present invention will be described. The power converter 100 is an example of a "railroad vehicle power converter" in the claims.

[0023] A railcar 101 (see FIG. 1) is a vehicle that runs using power from an overhead line, and is provided with a power converter 100 on the underside 101a of the car body, which converts the power from the overhead line by switching semiconductor elements and controls the rotation of an induction motor that rotates the drive wheels while the vehicle is running. In the following description, the running direction of the railcar 101 is defined as the X direction, the direction of the sleepers perpendicular to the X direction is defined as the Y direction, and the up-down direction perpendicular to the XY plane is defined as the Z direction.

[0024] As shown in Figs. 2 to 4, the power conversion device 100 is disposed in a position surrounded by a plurality of other devices 102 such as air conditioners and control devices. As shown in Figs. 2 to 4, the power conversion device 100 is suspended and fixed to the underside 101a of a vehicle body. The power conversion device 100 includes a housing 10 to which a removable cover 11 is attached. The housing 10 is configured so that the interior is sealed by attaching the cover 11 to the front side (Y2 direction side) of the housing 10.

[0025] (Configuration inside the power conversion device housing) As shown in Fig. 5, the power conversion device 100 includes a power conversion unit 1, a power conversion unit 2, and a unit mounting frame 3 that houses the power conversion units 1 and 2 within a sealed housing 10. The power conversion unit 1 is an example of a "first power conversion unit" in the claims, and the power conversion unit 2 is an example of a "second power conversion unit" in the claims. The power conversion units 1 and 2 are also an example of a "multiple power conversion units" in the claims, and the unit mounting frame 3 is an example of a "unit housing section" in the claims.

[0026] The power converter 100 also includes a cooling fan 4 and an electronic device unit 5 (see FIG. 5).

[0027] The cooling fan 4 is provided on the bottom side (Z2 direction side) of the housing 10, and is configured to circulate air inside the housing 10 to cool the heat dissipation section 1b (see Figs. 6 to 10) of the power conversion unit 1 and the heat dissipation section 2b (see Fig. 9) of the power conversion unit 2. Note that the heat dissipation section 1b is an example of a "first heat dissipation section" in the claims, and the heat dissipation section 2b is an example of a "second heat dissipation section" in the claims.

[0028] The electronic device unit 5 is a unit in which electronic devices such as an EMC (ElectroMagnetic Compatibility) filter, fuses, and a power supply for a cooling fan (not shown) are provided. The electronic devices provided in the electronic device unit 5 are configured to be electrically connected to the power conversion units 1 and 2. The electronic device unit 5 is disposed on the inner wall surface of the upper surface of the housing so as to face the cooling fan 4 on the opposite side (Z1 direction side) of the power conversion units 1 and 2 housed in the unit mounting frame 3 from the cooling fan 4.

[0029] Additionally, a relay connector 6 and an I / F board 7 are disposed within the housing 10. The relay connector 6 is connected to the power conversion units 1 and 2 by wiring C (see FIG. 9) and is configured to electrically connect the power conversion units 1 and 2 to a main circuit and a control circuit. Additionally, the housing 10 is provided with a slide portion 12. Note that, in this embodiment, two unit mounting frames 3, each accommodating the power conversion units 1 and 2, are housed within the housing 10.

[0030] (Power conversion unit) The power conversion unit 1 includes a power conversion body 1a (see FIGS. 6 to 9) and a heat dissipation section 1b (see FIGS. 6 to 9) for dissipating heat inside the power conversion body 1a.

[0031] Moreover, the heat dissipation section 1b includes heat dissipation fins F1 (see Figs. 6 to 9) and fastening holes B1 (see Figs. 6 and 8). The heat dissipation section 1b is configured to dissipate heat inside the power conversion section main body 1a by the heat dissipation fins F1 and to be fastened and fixed to the unit mounting frame 3. The fastening holes B1 are provided at the four corners of the heat dissipation section 1b (see Figs. 6 and 8) in order to fasten and fix the heat dissipation section 1b.

[0032] Furthermore, like the power conversion unit 1, the power conversion unit 2 includes a power conversion main body 2a (see Figure 9) and a heat dissipation section 2b (see Figure 9) for dissipating heat inside the power conversion main body 2a, and the heat dissipation section 2b includes a heat dissipation fin F2 (see Figures 9 and 16) and a fastening hole section B2 (see Figure 16).

[0033] (Unit mounting frame) Next, the configuration of the unit mounting frame 3 will be described.

[0034] 9, the power conversion unit 1 and the power conversion unit 2 are mounted on the unit mounting frame 3 with the heat dissipation section 1b of the power conversion unit 1 and the heat dissipation section 2b of the power conversion unit 2 facing each other, and are configured to be housed within the unit mounting frame 3. The power conversion unit 1 and the power conversion unit 2 are mounted on the unit mounting frame 3 with the power conversion unit 1 and the power conversion unit 2 offset from each other in the vertical direction (Z direction).

[0035] The unit mounting frame 3 has a shape in which a plurality of frames are combined (see Figs. 9 and 10). Specifically, as shown in Fig. 10, the unit mounting frame 3 includes a lower surface portion 3a, an upper surface portion 3b, a support portion 3c, a side surface portion 3d, a side surface portion 3e, a mounting plate portion 3f, and a fixing portion 3g.

[0036] The lower surface portion 3a is provided at a position (see FIG. 9) corresponding to the lower surface (surface on the Z2 direction side) of the power conversion unit 1 when the power conversion unit 1 is attached. The upper surface portion 3b is provided at a position (see FIG. 9) corresponding to the upper surface (surface on the Z1 direction side) of the power conversion unit 2 when the power conversion unit 2 is attached. The lower surface portion 3a is formed so as to extend from the lower side (Z2 direction side) of the mounting plate portion 3f in the front direction (Y2 direction) (see FIGS. 11 to 13). The upper surface portion 3b is formed so as to extend from the upper side (Z1 direction side) of the mounting plate portion 3f in the back direction (Y1 direction) (see FIGS. 11 to 13).

[0037] The unit mounting frame 3 is provided with an opening A1 (see Figs. 9 and 10) that straddles the lower surface portion 3a and the mounting plate portion 3f, and an opening A2 (see Figs. 9 and 10) that straddles the upper surface portion 3b and the mounting plate portion 3f. The opening A1 is provided on the side of the unit mounting frame 3 where the cooling fan 4 is arranged (the Z2 direction side). The opening A1 is an example of a "first cooling opening" in the claims.

[0038] Further, the lower surface portion 3a is provided with fastening holes B3 for fastening the unit mounting frame 3 to the housing 10. The unit mounting frame 3 is configured so as to be fastened and fixed by screw members 93 (see FIG. 20) using fastening holes B4 (see FIG. 18) of a slide portion 12 inside the housing 10, which will be described later, and fastening holes B3 of the lower surface portion 3a.

[0039] Moreover, the support portion 3c has a substantially U-shape (see Figs. 9, 10, and 12), and is configured to support the wiring C (see Fig. 9) connected to the power conversion unit 2. The support portion 3c is provided at a position (see Fig. 9) corresponding to the lower surface (surface on the Z2 direction side) of the power conversion unit 2 when the power conversion unit 2 is attached. The support portion 3c is disposed (see Fig. 13) on the opposite side (Y1 direction side) to the lower surface portion 3a with respect to the mounting plate portion 3f in the direction in which the power conversion units 1 and 2 face each other (Y direction).

[0040] The side surface portion 3d is formed to extend in the front direction (Y2 direction) and the rear direction (Y1 direction) (see FIGS. 10 and 11) from one end (X2 direction side) of the mounting plate portion 3f in the direction (X direction) perpendicular to the side surfaces of the power conversion units 1 and 2. The side surface portion 3e is formed to extend in the front direction (Y2 direction) and the rear direction (Y1 direction) (see FIGS. 10 and 11) from the other end (X1 direction side) of the mounting plate portion 3f in the direction (X direction) perpendicular to the side surfaces of the power conversion units 1 and 2.

[0041] The side surface portion 3d is provided with openings A3 and A4 at positions corresponding to the side surface of the power conversion unit 1 when the power conversion unit 1 is attached (see FIG. 10), and is provided with an opening A5 at a position corresponding to the side surface of the power conversion unit 2 when the power conversion unit 2 is attached (see FIG. 10). The side surface portion 3e is provided with openings A6 and A7 at positions corresponding to the side surface of the power conversion unit 1 when the power conversion unit 1 is attached (see FIG. 10), and is provided with an opening A8 at a position corresponding to the side surface of the power conversion unit 2 when the power conversion unit 2 is attached (see FIG. 10). The side surface portions 3d and 3e are configured to cover the outer periphery of the side surface of the power conversion unit 1 at positions corresponding to the side surface of the power conversion unit 1 when viewed from a direction perpendicular to the side surface of the power conversion unit 1 (X direction) (see FIGS. 9 and 17). In addition, side portions 3d and 3e are configured to cover the upper side (Z1 direction side) of the side of the power conversion unit 2 at positions corresponding to the side of the power conversion unit 2 when viewed from a direction perpendicular to the side of the power conversion unit 2 (X direction) (see Figures 9 and 17).

[0042] The mounting plate portion 3f has a plate shape and has fastening holes B5 and B6 (see FIGS. 14 and 15) for fastening and fixing the power conversion units 1 and 2. The power conversion units 1 and 2 are configured to be fastened and fixed to the mounting plate portion 3f of the unit mounting frame 3 so as to sandwich the mounting plate portion 3f (see FIG. 16).

[0043] The fastening holes B5 are provided in four locations (see FIGS. 14 and 15) on the mounting plate 3f corresponding to the fastening holes B1 of the power conversion unit 1. The power conversion unit 1 is fastened to the unit mounting frame 3 with four screw members 91 using the fastening holes B1 and the fastening holes B5 of the mounting plate 3f (see FIG. 16).

[0044] The fastening holes B6 are provided in four locations (see FIGS. 14 and 15) on the mounting plate 3f corresponding to the fastening holes B2 of the power conversion unit 2. The power conversion unit 2 is fastened to the unit mounting frame 3 with four screw members 92 using the fastening holes B2 and the fastening holes B6 of the mounting plate 3f (see FIG. 16).

[0045] The fixing portion 3g is provided with fastening holes B7 (see FIG. 10) for fastening the unit mounting frame 3 to the housing 10. The fastening holes B7 are provided so as to straddle the fixing portion 3g and the upper surface portion 3b.

[0046] Furthermore, fastening hole B7 has a potbellied shape (see Figs. 14 and 15) formed by combining a portion on the upper side (Z1 direction side) where the hole width is narrower than the head of the screw member 94 (see Figs. 21 and 22) and a portion on the lower side (Z2 direction side) where the hole width is wider than the head of the screw member 94 (see Figs. 21 and 22). The unit mounting frame 3 is configured to be fastened to the housing 10 by the screw member 94 (see Figs. 20 to 22) using a frame mounting portion 13 (see Figs. 20 to 22) in the housing 10 described later and fastening hole B7 of the fixing portion 3g.

[0047] In addition, in a state where the power conversion unit 1 is attached (housed) in the unit mounting frame 3 (see FIG. 17), the ends of the lower surface portion 3a and the side surface portions 3d and 3e of the unit mounting frame 3 on the front side (Y2 direction side) are located closer to the front side (Y2 direction side) than the power conversion unit main body 1a of the power conversion unit 1. As a result, even if the unit mounting frame 3 is placed with the surface of the mounting plate portion 3f on which the power conversion unit 2 is attached facing upward (the surface on which the power conversion unit 1 is attached facing downward) in a state where the power conversion unit 1 is attached to the mounting plate portion 3f, the power conversion unit main body 1a of the power conversion unit 1 does not come into contact with the surface on which it is placed. Therefore, even in a state where the power conversion unit 1 is attached to the mounting plate portion 3f, the surface of the mounting plate portion 3f on which the power conversion unit 2 is attached can be faced upward, so that the power conversion unit 2 can be easily attached to or detached from the unit mounting frame 3 (mounting plate portion 3f).

[0048] In addition, the rear side (Y1 direction side) ends of the support portion 3c and the fixing portion 3g of the unit mounting frame 3 are located rearward (Y1 direction side) than the power conversion unit main body 2a of the power conversion unit 2. As a result, even if the unit mounting frame 3 is placed with the surface of the mounting plate portion 3f on which the power conversion unit 1 is attached facing upward (the surface on which the power conversion unit 2 is attached facing downward) with the power conversion unit 2 attached to the mounting plate portion 3f, the power conversion unit main body 2a of the power conversion unit 2 does not come into contact with the surface on which it is placed. Therefore, even when the power conversion unit 2 is attached to the mounting plate portion 3f, the surface of the mounting plate portion 3f on which the power conversion unit 1 is attached can be faced upward, so that the power conversion unit 2 can be easily attached to or detached from the unit mounting frame 3 (mounting plate portion 3f).

[0049] 18, a description will be given of the internal configuration of the housing 10 in a state where the unit mounting frame 3 accommodating the power conversion units 1 and 2 is removed. For simplification, the I / F board 7 is omitted.

[0050] In the housing 10, the cooling fan 4 is disposed so as not to overlap with the sliding portion 12 when viewed from a direction perpendicular to the bottom surface of the housing 10 (Z direction) (see FIG. 18).

[0051] The electronic equipment unit 5 has openings A9, A10, A11, A12, A13, A14, A15, and A16 (see FIG. 18) through which the cooling air blown from the cooling fan 4 passes, and is configured so that the cooling air blown from the cooling fan 4 hits the inner wall surface of the upper surface of the housing 10 from the bottom side (Z2 direction side) of the housing 10 toward the upper side (Z1 direction side) of the housing 10 through the openings A9, A10, A11, A12, A13, A14, A15, and A16 of the electronic equipment unit 5. The openings A9, A10, A11, A12, A13, A14, A15, and A16 are examples of "second cooling openings" in the claims.

[0052] Furthermore, the slide portion 12 has fastening holes B4 (see FIG. 18) for fastening and fixing the unit mounting frame 3 on the slide surface S1 along which the unit mounting frame 3 slides.

[0053] The side surface portions 3d and 3e of the unit mounting frame 3 are configured to be spaced apart (see FIG. 5) from the side surfaces of the power conversion units 1 and 2 on the side surfaces (X direction) of the power conversion units 1 and 2 when the power conversion units 1 and 2 are attached (housed) in the unit mounting frame 3. As a result, the side surface portions 3d and 3e (frame portions) of the unit mounting frame 3 are configured to be grippable by the worker 200 (see FIG. 19) when the power conversion units 1 and 2 are attached (housed).

[0054] The worker 200 can grasp the side portions 3d and 3e of the unit mounting frame 3 (see FIG. 19) so as to avoid the relay connector 6 (see FIG. 5), place the unit mounting frame 3 on the slide surface S1 (see FIG. 18 to FIG. 20) of the slide portion 12, and slide it.

[0055] As shown in FIG. 20 , the unit mounting frame 3 is configured to be fastened within the housing 10 by fastening the underside portion 3a of the unit mounting frame 3 to the slide portion 12 within the housing 10 with screw members 93, and fastening the fixing portion 3g of the unit mounting frame 3 to the frame mounting portion 13 within the housing 10 with screw members 94.

[0056] The housing 10 including the slide portion 12 and the unit mounting frame 3 are made of conductive materials such as aluminum. The power conversion units 1 and 2 mounted (housed) in the unit mounting frame 3 are configured to be earth-connected to the railcar 101 from the underside 101a of the railcar 101 (see FIG. 1) via the unit mounting frame 3, the slide portion 12 and the housing 10 main body.

[0057] Furthermore, since the fastening hole portion B7 of the fixing portion 3g of the unit mounting frame 3 has the above-mentioned daruma hole shape, the unit mounting frame 3 can be removed from the frame mounting portion 13 by loosening the screw member 94 from the fastened and fixed state (see Figure 21) and lifting the unit mounting frame 3 upward (in the Z1 direction) (see Figure 22) without removing the screw member 94 from the frame mounting portion 13 of the housing 10.

[0058] (Layout relative to cooling fan) Next, the arrangement of heat dissipation sections 1b and 2b, openings A1 and A2 of unit mounting frame 3, and openings A9, A10, A11, A12, A13, A14, A15, and A16 of electronic device unit 5 relative to cooling fan 4 will be described with reference to Figures 23 to 25.

[0059] 23, the unit mounting frame 3 is fastened to the housing 10, so that the heat dissipation section 1b, the opening A1, and the cooling fan 4 are arranged to overlap when viewed from a direction perpendicular to the bottom surface of the housing 10 (Z direction) (see FIG. 24). Also, the heat dissipation section 2b, the opening A2, and the cooling fan 4 are arranged to overlap when viewed from a direction perpendicular to the bottom surface of the housing 10 (Z direction) (see FIG. 24).

[0060] Furthermore, when viewed from a direction perpendicular to the bottom surface of the housing 10 (Z direction), the heat dissipation sections 1b and 2b are arranged to overlap with the cooling fan 4 (see Figures 23 and 24), so that the heat dissipation sections 1b and 2b can be cooled by the common cooling fan 4.

[0061] The cooling fan 4 arranged on one side (X1 direction side) in the direction (X direction) perpendicular to the side surfaces of the power conversion units 1 and 2 and the opening A9 are arranged to overlap when viewed from the direction (Z direction) perpendicular to the bottom surface of the housing 10 (see FIG. 25). Also, the cooling fan 4 arranged on the other side (X2 direction side) in the direction (X direction) perpendicular to the side surfaces of the power conversion units 1 and 2 and the openings A12, A13, and A14 are arranged to overlap when viewed from the direction (Z direction) perpendicular to the bottom surface of the housing 10 (see FIG. 25).

[0062] 23, the unit mounting frame 3 is fastened to the housing 10, so that the cooling air blown from the cooling fan 4 passes through the opening A1 provided in the lower surface 3a of the unit mounting frame 3. The cooling air blown from the cooling fan 4 cools the heat dissipation sections 1b and 2b, and passes through the opening A2 provided in the upper surface 3b of the unit mounting frame 3. The cooling air that has cooled the heat dissipation sections 1b and 2b passes through the openings A9, A10, A11, A12, A13, A14, A15, and A16 provided in the electronic device unit 5, hits the inner wall surface of the upper surface of the housing 10, and circulates within the housing 10.

[0063] (Effects of this embodiment) In this embodiment, the following effects can be obtained.

[0064] In this embodiment, as described above, the unit mounting frame 3 housing the power conversion unit 1 including the heat dissipation unit 1b and the power conversion unit 2 including the heat dissipation unit 2b is housed in the housing 10, so that the heat dissipation units 1b and 2b can be housed in the sealed housing 10. As a result, the heat dissipation unit 1b of the power conversion unit 1 and the heat dissipation unit 2b of the power conversion unit 2 are housed in the sealed housing 10, so that it is possible to prevent the intrusion of foreign matter from outside the housing 10, which may cause the adhesion of foreign matter and soiling. As a result, it is possible to suppress the deterioration of the cooling function of the heat dissipation units 1b and 2b due to the adhesion of foreign matter and soiling.

[0065] In the present embodiment, as described above, the unit mounting frame 3 is configured to be able to house the power conversion units 1 and 2. This allows the unit mounting frame 3 to house the power conversion units 1 and 2, so that when storing the power conversion units 1 and 2 in the housing 10 from within the housing 10 or when removing the power conversion units 1 and 2 from within the housing 10, the power conversion units 1 and 2 can be stored or removed simultaneously. As a result, compared to a case in which only one of the power conversion units 1 or 2 is housed in the unit mounting frame 3, an increase in the amount of work required when storing the power conversion units 1 and 2 in the housing 10 or removing the power conversion units 1 and 2 from within the housing 10 can be suppressed.

[0066] In this embodiment, as described above, the heat dissipation units 1b and 2b are configured to be cooled by a common cooling fan 4. This allows the air inside the sealed housing 10 to be circulated by the cooling fan 4, so that the heat dissipation units 1b and 2b can be cooled without taking in outside air. In addition, by cooling the heat dissipation units 1b and 2b by a common cooling fan 4, an increase in the number of parts can be suppressed compared to a case in which a cooling fan 4 is provided for each of the heat dissipation units 1b and 2b.

[0067] In this embodiment, as described above, the heat dissipation sections 1b and 2b are arranged to overlap with the cooling fan 4 when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction). As a result, the heat dissipation sections 1b and 2b overlap with the cooling fan 4 when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction), so that both the heat dissipation sections 1b and 2b can be easily cooled by the cooling air blown from the common cooling fan 4.

[0068] Furthermore, in this embodiment, as described above, the unit mounting frame 3 has an opening A1 through which the cooling air blown from the cooling fan 4 passes, on the side (Z2 direction side) of the unit mounting frame 3 where the cooling fan 4 is arranged. This allows the cooling air to be directed to the heat dissipation sections 1b and 2b by the opening A1 through which the cooling air passes, without being blocked by the unit mounting frame 3. As a result, the heat dissipation sections 1b and 2b can be cooled more efficiently than when the unit mounting frame 3 does not have the opening A1.

[0069] In this embodiment, as described above, the cooling fan 4 is provided on the bottom side (Z2 direction side) of the housing 10, the heat dissipation section 1b includes the heat dissipation fins F1, and the heat dissipation section 1b includes the heat dissipation fins F2. The unit mounting frame 3 is fastened and fixed to the housing 10, so that the heat dissipation section 1b, the opening A1, and the cooling fan 4 are arranged to overlap when viewed from a direction perpendicular to the bottom surface of the housing 10 (Z direction). Thus, by fastening and fixing the unit mounting frame 3 to the housing 10, the heat dissipation section 1b, the opening A1, and the cooling fan 4 are arranged to overlap when viewed from a direction perpendicular to the bottom surface of the housing 10 (Z direction), so that the heat dissipation section 1b can be arranged at a position where the cooling air blown from the cooling fan 4 hits it through the opening A1 simply by fastening and fixing the unit mounting frame 3 to the housing 10. As a result, the positioning of the heat dissipation section 1b, the opening A1, and the cooling fan 4 can be easily performed. Moreover, by providing the cooling fan 4 on the bottom side (Z2 direction side) of the housing 10, the cooling air can be blown from the bottom side (Z2 direction side) of the housing 10 to the heat dissipation sections 1b and 2b. This allows the air inside the sealed housing 10 to be circulated by utilizing the ascending air currents generated by the heat dissipated from the heat dissipation sections 1b and 2b, so that the heat dissipation sections 1b and 2b can be cooled more efficiently. Furthermore, by including the heat dissipation fins F1 and F2 in the heat dissipation section 1b, the electric heating area of ​​the heat dissipation sections 1b and 2b is increased compared to a case in which the heat dissipation section 1b does not include the heat dissipation fins F1 and the heat dissipation section 1b does not include the heat dissipation fins F2, so that the efficiency of heat dissipation can be improved.

[0070] In the present embodiment, as described above, the electronic device unit 5 has the opening A9 through which the cooling air blown from the cooling fan 4 passes. As a result, the electronic device unit 5 has the opening A9 through which the cooling air passes, and thus the cooling air that has cooled the heat dissipation units 1b and 2b can be applied to the inner wall surface of the upper surface of the housing 10 through the opening A9. As a result, even when the electronic device unit 5 is disposed so as to face the cooling fan 4 on the opposite side of the power conversion units 1 and 2 housed in the unit mounting frame 3 in the housing 10, the heat taken from the heat dissipation units 1b and 2b by the cooling air can be dissipated from the housing 10, compared to the case where the electronic device unit 5 does not have the opening A9.

[0071] Furthermore, in this embodiment, as described above, the unit mounting frame 3 has a shape in which a plurality of frames are combined, and is configured so that the frame portion of the unit mounting frame 3 can be grasped when the power conversion units 1 and 2 are housed therein. This allows the worker 200 to grasp the frame portion of the unit mounting frame 3 when the power conversion units 1 and 2 are housed therein, making it easier to store the unit mounting frame 3 to which the power conversion units 1 and 2 are attached (housed) in the housing 10, or to remove the unit mounting frame 3 to which the power conversion units 1 and 2 are attached (housed).

[0072] In this embodiment, as described above, the unit mounting frame 3 includes the lower surface portion 3a and the support portion 3c that supports the wiring C connected to the power conversion unit 2. Thus, by supporting the wiring C connected to the power conversion unit 2 by the support portion 3c, it is possible to prevent the wiring C connected to the power conversion unit 2 from being pinched between the housing 10 and the unit mounting frame 3 when the unit mounting frame 3 is stored in the housing 10 or when the unit mounting frame 3 is removed from the housing 10. Also, by providing the lower surface portion 3a at a position (position on the Z2 direction side) corresponding to the lower surface of the power conversion unit 1 of the unit mounting frame 3, it is possible to protect the power conversion unit 1 from impact from the lower surface side.

[0073] Furthermore, in this embodiment, as described above, the housing 10 is provided with the slide portion 12 for sliding the unit mounting frame 3, in a state where the worker 200 holds the unit mounting frame 3 housing the power conversion unit 1, inside the housing 10. This allows the unit mounting frame 3 held by the worker 200 to be easily slid to the mounting position of the unit mounting frame 3 inside the housing 10 by sliding the unit mounting frame 3 held by the worker 200 on the slide surface S1 of the slide portion 12.

[0074] In addition, in this embodiment, as described above, the cooling fan 4 is disposed so as not to overlap with the sliding portion 12 when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction). This makes it possible to prevent the sliding portion 12 from blocking the cooling air blown from the cooling fan 4, and therefore makes it easier to cool the heat dissipation portions 1b and 2b compared to a case in which the cooling fan 4 overlaps with the sliding portion 12 when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction).

[0075] [Variations] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims rather than the description of the above embodiments, and further includes all modifications (variations) within the meaning and scope of the claims.

[0076] For example, in the above embodiment, the housing 10 is configured to house two unit mounting frames 3 (unit housing parts) housing the power conversion unit 1 (first power conversion unit) and the power conversion unit 2 (second power conversion unit), but the present invention is not limited to this. For example, the housing may be configured to house one unit housing part or three or more unit housing parts.

[0077] In the above embodiment, the unit mounting frame 3 (unit accommodating section) is configured to be able to accommodate the power conversion unit 1 (first power conversion unit) and the power conversion unit 2 (second power conversion unit), but the present invention is not limited to this. In the present invention, the unit accommodating section may be configured to accommodate one power conversion unit, or may be configured to accommodate three or more power conversion units.

[0078] In the above embodiment, the heat dissipation section 1b (first heat dissipation section) and the heat dissipation section 2b (second heat dissipation section) are configured to be cooled by a common cooling fan 4, but the present invention is not limited to this. In the present invention, the first heat dissipation section and the second heat dissipation section may be configured to be cooled by separate cooling fans.

[0079] In the above embodiment, the heat dissipation section 1b (first heat dissipation section) and the heat dissipation section 2b (second heat dissipation section) are arranged to overlap with the cooling fan 4 when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction), but the present invention is not limited to this. In the present invention, only one of the first heat dissipation section or the second heat dissipation section may be arranged to overlap with the cooling fan when viewed from the direction perpendicular to the bottom surface of the housing. In the present invention, the first heat dissipation section and the second heat dissipation section may be arranged not to overlap with the cooling fan when viewed from the direction perpendicular to the bottom surface of the housing.

[0080] In the above embodiment, the electronic device unit 5 is disposed on the opposite side (Z1 direction side) of the cooling fan 4 with respect to the power conversion unit 1 (first power conversion unit) and the power conversion unit 2 (second power conversion unit) housed in the unit mounting frame 3 (unit housing section) in the housing 10, facing the cooling fan 4, and has an opening A9 (second cooling opening) through which the cooling air blown from the cooling fan 4 passes, but the present invention is not limited to this. In the present invention, the electronic device unit may be disposed at a position on the side of the unit housing section without providing the second cooling opening.

[0081] In the above embodiment, the unit mounting frame 3 (unit accommodating section) has a shape in which multiple frames are combined, and the frame portion of the unit mounting frame 3 is configured to be grippable when the power conversion unit 1 (first power conversion unit) and the power conversion unit 2 (second power conversion unit) are accommodated therein, but the present invention is not limited to this. In the present invention, the unit accommodating section may have a box shape that surrounds the side surfaces of the multiple power conversion units.

[0082] In the above embodiment, the support portion 3c is provided at a position corresponding to the lower surface (the surface on the Z2 direction side) of the power conversion unit 2 when the power conversion unit 2 (second power conversion unit) is attached, but the present invention is not limited to this. In the present invention, the support portion may be provided at a position corresponding to the upper surface of the second power conversion unit.

[0083] In the above embodiment, the cooling fan 4 is disposed so as not to overlap with the sliding portion 12 when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction), but the present invention is not limited to this. In the present invention, the cooling fan may be provided on the upper surface side of the housing opposite to the bottom surface side of the housing with respect to the sliding portion provided on the bottom surface side of the housing, and may be disposed so that the cooling fan and the sliding portion overlap when viewed from the direction perpendicular to the bottom surface of the housing. [Explanation of symbols]

[0084] 1 Power conversion unit (first power conversion unit) 1a Power conversion unit body 1b Heat radiation part (1st heat radiation part) 2 Power conversion unit (second power conversion unit) 2a Power conversion unit 2b Heat radiation part (second heat radiation part) 3 Unit mounting frame (unit housing) 3a Bottom part 3c Support part 4 Cooling Fan 5 Electronics Unit 10. Chassis 12 Slide section 100 Power conversion device (power conversion device for railway vehicles) 101 Railroad cars A1 opening (1st cooling opening) A9 opening (second cooling opening) A10 opening (second cooling opening) A11 opening (second cooling opening) A12 opening (second cooling opening) A13 opening (second cooling opening) A14 opening (second cooling opening) A15 opening (second cooling opening) A16 opening (second cooling opening) C Wiring (Wiring connected to the second power conversion unit) F1 Heat dissipation fin F2 Heat dissipation fin

Claims

1. a power conversion unit including a power conversion body and a heat dissipation part for dissipating heat inside the power conversion body; a unit housing portion that houses the entire power conversion unit including the heat dissipation portion; a sealed housing provided in the railway vehicle and housing the unit housing therein; A power conversion device for a railway vehicle, which is configured to be stored within the sealed housing without exposing the entire heat dissipation section to the outside, by storing the unit storage section, which houses the power conversion unit including the heat dissipation section, within the housing.

2. the unit accommodating section is configured to be able to accommodate a plurality of power conversion units including a first power conversion unit and a second power conversion unit, the first power conversion unit includes a first heat dissipation section that is the heat dissipation section for dissipating heat inside the power conversion body, 2. The power conversion device for a railway vehicle according to claim 1, wherein the second power conversion unit includes a second heat dissipation section that is the heat dissipation section for dissipating heat inside the power conversion section main body.

3. a cooling fan configured to circulate air within the housing to cool the heat dissipation portion; 3. The power conversion device for a railway vehicle according to claim 2, wherein the first heat dissipation portion and the second heat dissipation portion are configured to be cooled by a common cooling fan.

4. the first power conversion unit and the second power conversion unit are configured to be accommodated in the unit accommodating portion with the first heat dissipation portion and the second heat dissipation portion facing each other, 4. The power conversion device for a railway vehicle according to claim 3, wherein the first heat dissipation section and the second heat dissipation section are arranged to overlap with the cooling fan when viewed from a direction perpendicular to a bottom surface of the housing.

5. 5. The power conversion device for a railway vehicle according to claim 3, wherein the unit accommodating section has a first cooling opening, through which cooling air blown from the cooling fan passes, on a side of the unit accommodating section where the cooling fan is arranged.

6. The cooling fan is provided on the bottom side of the housing, The heat dissipation portion includes a heat dissipation fin, 6. The power conversion device for a railway vehicle as described in claim 5, wherein the unit accommodating portion is fastened and fixed to the housing, so that the first heat dissipation portion, the first cooling opening, and the cooling fan are arranged to overlap when viewed from a direction perpendicular to the bottom surface of the housing.

7. an electronic device unit provided with an electronic device electrically connected to the power conversion unit; 7. The power conversion device for a railway vehicle as described in claim 6, wherein the electronic equipment unit is arranged within the housing so as to face the cooling fan on the opposite side of the power conversion unit housed in the unit accommodating section from the cooling fan, and has a second cooling opening through which cooling air blown from the cooling fan passes.

8. The power conversion device for a railway vehicle according to any one of claims 4 to 7, wherein the unit accommodating section has a shape formed by combining a plurality of frames, and the frame portion of the unit accommodating section is configured to be graspable when the power conversion unit is accommodated therein.

9. 9. The power conversion device for a railway vehicle according to claim 8, wherein the unit accommodating portion includes a lower surface portion provided at a position corresponding to a lower surface of the first power conversion unit, and a support portion provided at a position corresponding to a lower surface of the second power conversion unit, the support portion supporting wiring connected to the second power conversion unit.

10. 10. The power conversion device for a railway vehicle according to claim 8 or 9, wherein the housing is provided with a sliding portion for slidingly moving the unit accommodating portion, in which the power conversion unit is housed, while an operator is gripping the unit accommodating portion inside the housing.

11. The power converter for a railway vehicle according to claim 10 , wherein the cooling fan is disposed so as not to overlap with the slide portion when viewed from a direction perpendicular to the bottom surface of the housing.

Images