JP2021172171A - Power conversion device for railway vehicle - Google Patents

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

The present invention relates to a power conversion device for a railroad vehicle, and more particularly to a power conversion device for a railroad vehicle in which a heat radiating portion is configured to be housed in a housing.

Conventionally, there is known a power conversion device for railway vehicles in which a heat radiating portion can be stored in a housing (see, for example, Patent Document 1).

In Patent Document 1, a cooling device including heat radiation fins, a bottom plate frame on which the cooling device is mounted, an upper frame provided so as to face the bottom plate frame, and a side wall connecting the bottom plate frame and the upper frame are provided. , A cooling device mounting frame to which a cooling device is mounted, and a power conversion device for a railroad vehicle are disclosed. The cooling device is mounted on the cooling device mounting frame in a state of being mounted on the bottom plate frame having an opening at the bottom, and is a space surrounded by the upper frame, the side wall, the bottom plate frame, and the cooling device mounting frame. It is stored in (inside the housing). Further, at the lower part of the cooling device, punch holes are provided as air passage holes for cooling the heat radiation fins of the cooling device. The electric power conversion device for a railroad vehicle described in Patent Document 1 has a punch hole in the lower part of the cooling device and an opening in the lower part of a bottom plate frame (housing) on which the cooling device is placed. , The space (inside the housing) surrounded by the side wall, the bottom plate frame, and the cooling device mounting frame is configured so that air for cooling the heat radiating fins (radiating part) is supplied from the outside of the housing. ..

JP-A-2009-196579

In the power conversion device for railway vehicles of Patent Document 1, in the space (inside the housing) surrounded by the upper frame, the side wall, the bottom plate frame, and the cooling device mounting frame, punch holes at the lower part of the cooling device are provided. Air for cooling the radiating fins is supplied from the outside of the housing through the opening at the bottom of the bottom plate frame (housing) on which the cooling device is placed. However, the electric power conversion device for railway vehicles of Patent Document 1 has a disadvantage that when air for cooling the heat radiation fins is supplied from the outside of the housing, foreign matter invades from the outside together with the air. Therefore, foreign matter that has entered from the outside through the punch holes at the bottom of the cooling device and the opening at the bottom of the bottom plate frame (housing) causes foreign matter to adhere to and stain the heat radiation fins (heat dissipation part). As a result, there is a problem that the cooling function of the heat radiation fins is lowered.

The present invention has been made to solve the above-mentioned problems, and one object of the present invention is a power conversion device for railway vehicles capable of suppressing deterioration of the cooling function of the heat radiating portion due to foreign matter adhesion and contamination. Is to provide.

In order to achieve the above object, the electric power conversion device for a railway vehicle according to one aspect of the present invention includes a power conversion unit including a power conversion unit main body and a heat dissipation unit for radiating heat inside the power conversion unit main body. , A unit accommodating unit for accommodating a power conversion unit and a sealed housing provided in a railroad vehicle for accommodating the unit accommodating unit inside, and accommodating a power conversion unit including a heat dissipation unit. By storing the power in the housing, the heat radiating part can be stored in the sealed housing.

In the electric power conversion device for railway vehicles according to the above one aspect, as described above, the unit accommodating portion containing the power conversion unit including the heat radiating portion is housed in the housing, so that the heat radiating portion is housed in the sealed housing. It is configured to be storable. As a result, the heat radiating portion of the power conversion unit is housed in the sealed housing, so that it is possible to prevent foreign matter from entering from the outside of the housing, which causes foreign matter to adhere and stain. As a result, it is possible to suppress deterioration of the cooling function of the heat radiating portion due to foreign matter adhesion and contamination.

In the electric power conversion device for railway vehicles according to the above one aspect, preferably, the unit accommodating unit is configured to be able to accommodate a plurality of electric power conversion units including the first electric power conversion unit and the second electric power conversion unit. 1 The power conversion unit includes a first heat dissipation unit that is a heat dissipation unit for radiating heat inside the power conversion unit main body, and a second power conversion unit is for radiating heat inside the power conversion unit main body. Includes a second heat dissipation unit, which is a heat dissipation unit. With this configuration, a plurality of power conversion units can be accommodated in the unit accommodating portion, so that when the plurality of power conversion units are housed in the housing or when the plurality of power conversion units are taken out from the housing. In addition, a plurality of power conversion units can be stored at the same time, or a plurality of power conversion units can be taken out at the same time. As a result, as compared with the case where only one power conversion unit is accommodated in the unit accommodating portion, the amount of work when accommodating a plurality of power conversion units in the housing or when taking out the plurality of power conversion units from the housing. Can be suppressed.

In this case, preferably, a cooling fan configured to cool the heat radiating unit by circulating the air in the housing is further provided, and the first heat radiating part and the second heat radiating part are provided by a common cooling fan. It is configured to be cooled. With this configuration, the air inside the sealed housing can be circulated by the cooling fan, so that the heat radiating portion can be cooled without taking in outside air. Further, by cooling the first heat radiating part and the second heat radiating part with a common cooling fan, the number of parts is increased as compared with the case where the cooling fan is provided corresponding to each of the first heat radiating part and the second heat radiating part. Can be suppressed.

In the configuration including the cooling fan, preferably, the first power conversion unit and the second power conversion unit are housed in the unit housing unit so that the first heat radiation unit and the second heat radiation unit face each other. It is configured so that the first heat radiating portion, the second heat radiating portion, and the cooling fan are arranged so as to overlap each other 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 and the cooling fan overlap when viewed from the direction perpendicular to the bottom surface of the housing, so that the cooling air blown from a common cooling fan can easily be used. Both the first heat radiating part and the second heat radiating part can be cooled.

In the configuration including the cooling fan, preferably, the unit accommodating portion has a first cooling opening through which the cooling air blown from the cooling fan passes on the side where the cooling fan of the unit accommodating portion is arranged. With this configuration, the first cooling opening through which the cooling air passes allows the cooling air to be sent from the cooling fan to the first heat radiating portion and the second heat radiating portion without being blocked by the unit accommodating portion. Can be applied to. As a result, the first heat radiating portion and the second heat radiating portion can be cooled more efficiently than when the unit accommodating portion does not have the first cooling opening.

In this case, preferably, the cooling fan is provided on the bottom surface side of the housing, the heat radiating portion includes the heat radiating fins, and the unit housing portion is fastened and fixed to the housing so as to be perpendicular to the bottom surface of the housing. The first heat radiating portion, the first cooling opening, and the cooling fan are arranged so as to overlap each other when viewed from various directions. With this configuration, by fastening and fixing the unit housing to the housing, the first heat dissipation unit, the first cooling opening, and the cooling fan overlap when viewed from the direction perpendicular to the bottom surface of the housing. Since it is arranged in, the first heat radiating portion can be arranged at a position where the cooling air blown from the cooling fan hits through the first cooling opening only by fastening and fixing the unit accommodating portion to the housing. can. As a result, the positioning of the first heat radiating portion, the first cooling opening, and the cooling fan can be easily performed. Further, since the cooling fan is provided on the bottom surface side of the housing, the cooling air can be applied to the first heat radiating portion and the second heat radiating portion from the bottom surface side of the housing. As a result, the air in the sealed housing can be circulated by utilizing the updraft generated by the heat radiated from the first heat radiating part and the second heat radiating part, so that the first heat radiating part can be more efficiently circulated. And the second heat dissipation part can be cooled. Further, since the heat radiating unit includes the heat radiating fins, the electric heating area of the heat radiating unit is expanded as compared with the case where the heat radiating unit does not include the heat radiating fins, so that the efficiency of heat dissipation can be improved.

In the configuration in which the cooling fan is provided on the bottom surface side of the housing, preferably, an electronic device unit provided with an electronic device electrically connected to the power conversion unit is provided, and the electronic device unit is provided in the unit accommodating portion. On the side opposite to the cooling fan with respect to the housed power conversion unit, a second cooling opening is provided in the housing so as to face the cooling fan and through which the cooling air blown from the cooling fan passes. Have. With this configuration, the electronic device unit has a second cooling opening through which the cooling air passes, so that the cooling air that has cooled the first heat radiating portion and the second heat radiating portion can be passed through the second cooling opening. It can be applied to the inner wall surface of the upper surface of the housing via. As a result, even when the electronic device unit is arranged so as to face the cooling fan on the side opposite to the cooling fan with respect to the power conversion unit housed in the unit accommodating portion in the housing, the electronic device unit is the first. 2. Compared with the case where the cooling opening is not provided, the heat taken from the first heat radiating portion and the second heat radiating portion by the cooling air can be radiated from the housing.

In the electric power conversion device for railway vehicles according to the above one aspect, preferably, the unit accommodating portion has a shape in which a plurality of frames are combined, and the frame of the unit accommodating portion is in a state where the electric power conversion unit is accommodated. The part is configured to be grippable. With this configuration, the operator can grip the frame portion of the unit accommodating portion while the power conversion unit is accommodated, so that the unit accommodating portion accommodating the power conversion unit can be stored in the housing. The work or the work of taking out the unit accommodating portion in which the power conversion unit is accommodated from the housing can be performed more easily.

In this case, preferably, the unit accommodating portion is provided at a position corresponding to the lower surface of the first power conversion unit and a lower surface portion corresponding to the lower surface of the second power conversion unit, and is provided in the second power conversion unit. Includes a support that supports the wires to be connected. With this configuration, by supporting the wiring connected to the second power conversion unit by the support portion, the unit accommodating portion can be stored in the housing or the unit accommodating unit can be taken out from the housing. At that time, it is possible to prevent the wiring connected to the second power conversion unit from being sandwiched between the housing and the unit accommodating portion. Further, by providing the lower surface portion at a position corresponding to the lower surface of the first power conversion unit of the unit accommodating portion, the first power conversion unit can be protected from the impact from the lower surface side.

In the configuration in which the unit accommodating portion has a shape in which a plurality of frames are combined, preferably, the housing is in a state where the operator grips the unit accommodating portion in which the power conversion unit is accommodated inside the housing. A slide portion for sliding the unit accommodating portion is provided. With this configuration, the unit accommodating portion gripped by the operator is slid on the sliding portion, so that the unit accommodating portion gripped by the operator is easily slid to the mounting position of the unit accommodating portion in the housing. be able to.

In this case, preferably, the cooling fan is arranged so as not to overlap the slide portion when viewed from the direction perpendicular to the bottom surface of the housing. With this configuration, it is possible to prevent the slide portion from blocking the cooling air blown from the cooling fan, so that when the cooling fan overlaps the slide portion when viewed from the direction perpendicular to the bottom surface of the housing. In comparison, the first heat radiating part and the second heat radiating part can be easily cooled.

According to the present invention, as described above, it is possible to provide a power conversion device for railway vehicles capable of suppressing deterioration of the cooling function of the heat radiating portion due to foreign matter adhesion and contamination.

It is a figure which showed the railroad vehicle which provided the electric power conversion apparatus by one Embodiment of this invention. It is a front view of the power conversion device provided on the lower surface of the vehicle body of the railroad vehicle according to one embodiment of the present invention. It is a side view of the power conversion device provided on the lower surface of the vehicle body of the railroad vehicle according to one embodiment of the present invention. It is a top view of the power conversion device provided on the lower surface of the vehicle body of the railroad vehicle according to the embodiment of the present invention. It is a figure for demonstrating the structure of each part of the power conversion apparatus by one Embodiment of this invention. It is a perspective view of the power conversion unit by the power conversion apparatus of one Embodiment of this invention. It is a top view of the power conversion unit. It is a rear view of the power conversion unit. It is a perspective view of the unit mounting frame which accommodated the power conversion unit by the power conversion apparatus of one Embodiment of this invention. It is a perspective view of the unit mounting frame by the power conversion apparatus of one Embodiment of this invention. It is a top view of the unit mounting frame. It is a bottom view of the unit mounting frame. It is a side view of a unit mounting frame. It is a front view of the unit mounting frame. It is a rear view of the unit mounting frame. It is a figure for demonstrating the mounting of a power conversion unit to a unit mounting frame. It is a side view of the unit mounting frame accommodating a power conversion unit. It is a perspective view which showed the structure of the electronic equipment unit, the slide part and the cooling fan by the power conversion apparatus of one Embodiment of this invention. It is a figure for demonstrating the storage work and the taking-out work of a unit mounting frame. It is a figure for demonstrating the fastening and fixing of a unit mounting frame to a housing. It is a figure for demonstrating the fastening and fixing of a unit mounting frame and a frame mounting part of a housing. It is a figure for demonstrating release of fastening and fixing of a unit mounting frame and a frame mounting part of a housing. It is a schematic view seen from the side surface side of the housing for demonstrating the arrangement of the cooling fan and the heat dissipation part of the power conversion unit in the housing by the power conversion apparatus of one Embodiment of this invention. It is a schematic view seen from the bottom side of the housing for demonstrating the arrangement of a cooling fan in a housing, a heat dissipation part of a power conversion unit, and an opening of a unit mounting frame. It is a schematic view seen from the bottom side of the housing for demonstrating the arrangement of the opening of a cooling fan and an electronic device unit in a housing.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

The configuration of the power conversion device 100 for the railway vehicle 101 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 25. The power conversion device 100 is an example of a "power conversion device for railroad vehicles" within the scope of the claims.

The railroad vehicle 101 (see FIG. 1) is a vehicle that travels by using the electric power from the overhead wire, and is an induction motor that converts the electric power from the overhead wire by switching of semiconductor elements to rotate the drive wheels during traveling. A power conversion device 100 that controls rotation is provided on the lower surface 101a of the vehicle body. Hereinafter, the traveling direction of the railway vehicle 101 will be the X direction, the sleeper direction orthogonal to the X direction will be the Y direction, and the vertical direction orthogonal to the XY plane will be the Z direction.

As shown in FIGS. 2 to 4, the power conversion device 100 is arranged at a position surrounded by a plurality of other devices 102 such as an air conditioner and a control device. Then, as shown in FIGS. 2 to 4, the power conversion device 100 is suspended and fixed to the lower surface 101a of the vehicle body. The power conversion device 100 includes a housing 10 to which a removable cover 11 is attached. The housing 10 is configured to seal the inside by attaching a cover 11 to the front side (Y2 direction side) of the housing 10.

(Configuration inside the housing of the power converter)
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 for accommodating the power conversion units 1 and 2 in a sealed housing 10. .. The power conversion unit 1 is an example of the "first power conversion unit" in the claims, and the power conversion unit 2 is an example of the "second power conversion unit" in the claims. Further, the power conversion unit 1 and the power conversion unit 2 are examples of "plurality of power conversion units" in the claims, and the unit mounting frame 3 is an example of "unit accommodating parts" in the claims. ..

Further, the power conversion device 100 includes a cooling fan 4 and an electronic device unit 5 (see FIG. 5).

The cooling fan 4 is provided on the bottom surface side (Z2 direction side) in the housing 10, and by circulating the air in the housing 10, the heat radiating portion 1b of the power conversion unit 1 (see FIGS. 6 to 10). ) And the heat radiating portion 2b (see FIG. 9) of the power conversion unit 2 are configured to be cooled. The heat radiation unit 1b is an example of the "first heat radiation unit" in the claims, and the heat radiation unit 2b is an example of the "second heat radiation unit" in the claims.

The electronic device unit 5 is a unit provided with electronic devices such as an EMC (ElectroMagnetic Compatibility) filter (not shown), a fuse, and a power supply for a cooling fan. Further, the electronic device provided in the electronic device unit 5 is configured to be electrically connected to the power conversion units 1 and 2. The electronic device unit 5 is located inside the upper surface of the housing so as to face the cooling fan 4 on the side opposite to the cooling fan 4 (Z1 direction side) with respect to the power conversion units 1 and 2 housed in the unit mounting frame 3. It is placed on the wall.

Further, the relay connector 6 and the I / F board 7 are arranged in 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 the main circuit and the control circuit. Further, the housing 10 is provided with a slide portion 12. In the present embodiment, two unit mounting frames 3 containing the power conversion units 1 and 2 are housed in the housing 10.

(Power conversion unit)
The power conversion unit 1 includes a power conversion unit main body 1a (see FIGS. 6 to 9) and a heat dissipation unit 1b (see FIGS. 6 to 9) for radiating heat inside the power conversion unit main body 1a.

Further, the heat radiating portion 1b includes a radiating fin F1 (see FIGS. 6 to 9) and a fastening hole portion B1 (see FIGS. 6 and 8). The heat radiating unit 1b is configured to dissipate heat inside the power conversion unit main body 1a by the heat radiating fin F1 and to be fastened and fixed to the unit mounting frame 3. The fastening hole B1 is provided at the four corners (see FIGS. 6 and 8) of the heat radiating portion 1b in order to fasten and fix the heat radiating portion 1b.

Further, the power conversion unit 2 includes a power conversion unit main body 2a (see FIG. 9) and a heat dissipation unit 2b (see FIG. 9) for radiating heat inside the power conversion unit main body 2a, similarly to the power conversion unit 1. The heat radiating portion 2b includes a heat radiating fin F2 (see FIGS. 9 and 16) and a fastening hole portion B2 (see FIG. 16).

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

As shown in FIG. 9, the power conversion unit 1 and the power conversion unit 2 are attached to the unit mounting frame 3 in a state where the heat radiation unit 1b of the power conversion unit 1 and the heat radiation unit 2b of the power conversion unit 2 face each other. It is configured to be housed in the unit mounting frame 3. Further, the power conversion unit 1 and the power conversion unit 2 are mounted on the unit mounting frame 3 in a state of being displaced from each other in the vertical direction (Z direction).

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 is fixed to the lower surface portion 3a, the upper surface portion 3b, the support portion 3c, the side surface portion 3d, the side surface portion 3e, and the mounting plate portion 3f. Includes 3 g and parts.

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

The unit mounting frame 3 is provided with an opening A1 (see FIGS. 9 and 10) so as to straddle the lower surface portion 3a and the mounting plate portion 3f, and also straddles the upper surface portion 3b and the mounting plate portion 3f. Is provided with an opening A2 (see FIGS. 9 and 10). The opening A1 is provided on the side (Z2 direction side) of the unit mounting frame 3 where the cooling fan 4 is arranged. The opening A1 is an example of the "first cooling opening" in the claims.

Further, the lower surface portion 3a is provided with a fastening hole portion B3 for fastening and fixing the unit mounting frame 3 to the housing 10. The unit mounting frame 3 uses a screw member 93 (see FIG. 20) using a fastening hole B4 (see FIG. 18) of the slide portion 12 in the housing 10 and a fastening hole B3 of the lower surface portion 3a, which will be described later. ), It is configured so that it can be fastened and fixed.

Further, 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. ing. The support portion 3c is provided at a position (see FIG. 9) corresponding to the lower surface (the 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 arranged on the side opposite to the lower surface portion 3a (Y1 direction side) with respect to the mounting plate portion 3f in the direction (Y direction) in which the power conversion unit 1 and the power conversion unit 2 face each other (see FIG. 13). ).

The side surface portion 3d has a front direction (Y2 direction) and a back surface direction (Y1 direction) from one end (X2 direction side) of the direction (X direction) orthogonal to the side surfaces of the power conversion units 1 and 2 of the mounting plate portion 3f. It is formed so as to extend to (see FIGS. 10 and 11). Further, the side surface portion 3e is in the front direction (Y2 direction) from the other end (X1 direction side) in the direction orthogonal to the side surfaces (X direction) of the power conversion units 1 and 2 of the mounting plate portion 3f of the mounting plate portion 3f. It is formed so as to extend in the back direction (Y1 direction) (see FIGS. 10 and 11).

When the power conversion unit 1 is attached to the side surface portion 3d, openings A3 and A4 are provided at positions corresponding to the side surfaces of the power conversion unit 1 (see FIG. 10), and when the power conversion unit 2 is attached. An opening A5 is provided at a position corresponding to the side surface of the power conversion unit 2 (see FIG. 10). Further, when the power conversion unit 1 is attached to the side surface portion 3e, openings A6 and A7 are provided at positions corresponding to the side surfaces of the power conversion unit 1 (see FIG. 10), and the power conversion unit 2 is attached. At that time, the opening A8 is provided at a position corresponding to the side surface of the power conversion unit 2 (see FIG. 10). The side surface portions 3d and 3e cover the outer periphery of the side surface of the power conversion unit 1 at a position corresponding to the side surface of the power conversion unit 1 when viewed from a direction (X direction) orthogonal to the side surface of the power conversion unit 1. (See FIG. 17). Further, the side surface portions 3d and 3e are located above the side surface of the power conversion unit 2 (Z1) when viewed from a direction (X direction) orthogonal to the side surface of the power conversion unit 2 at a position corresponding to the side surface of the power conversion unit 2. It is configured to cover the directional side) (see FIGS. 9 and 17).

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).

The fastening hole portions B5 are provided at four locations (see FIGS. 14 and 15) on the mounting plate portion 3f corresponding to the fastening hole portion B1 of the power conversion unit 1. The power conversion unit 1 is fastened and fixed to the unit mounting frame 3 by the four screw members 91 by using the fastening hole portion B1 and the fastening hole portion B5 of the mounting plate portion 3f (see FIG. 16).

The fastening hole portions B6 are provided at four locations (see FIGS. 14 and 15) on the mounting plate portion 3f corresponding to the fastening hole portion B2 of the power conversion unit 2. The power conversion unit 2 is fastened and fixed to the unit mounting frame 3 by the four screw members 92 by using the fastening hole portion B2 and the fastening hole portion B6 of the mounting plate portion 3f (see FIG. 16).

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

Further, the fastening hole portion B7 is provided on the upper side (Z1 direction side), and the hole width is narrower than the screw head of the screw member 94 (see FIGS. 21 and 22) and the lower side (Z2 direction side). ), And has a Dharma hole shape (see FIGS. 14 and 15) formed in combination with a portion of the screw member 94 (see FIGS. 21 and 22) having a hole wider than the screw head. The unit mounting frame 3 uses a frame mounting portion 13 (see FIGS. 20 to 22) in the housing 10 described later and a fastening hole portion B7 of the fixing portion 3g, and is a screw member 94 (FIGS. 20 to 22). Refer to), and it is configured so that it can be fastened and fixed to the housing 10.

Further, in a state where the power conversion unit 1 is mounted (accommodated) on the unit mounting frame 3 (see FIG. 17), the ends of the lower surface portion 3a, the side surface portions 3d and 3e of the unit mounting frame 3 on the front side (Y2 direction side). The unit is located on the front side (Y2 direction side) of the power conversion unit 1 of the power conversion unit 1 with respect to the power conversion unit main body 1a. As a result, with the power conversion unit 1 attached to the mounting plate portion 3f, the surface of the mounting plate portion 3f to which the power conversion unit 2 is attached faces upward (the surface to which the power conversion unit 1 is attached faces downward). Even if the unit mounting frame 3 is mounted, the power conversion unit main body 1a of the power conversion unit 1 does not come into contact with the mounted surface. Therefore, even when the power conversion unit 1 is attached to the mounting plate portion 3f, the surface of the mounting plate portion 3f to which the power conversion unit 2 is attached can be directed upward, so that the unit mounting frame 3 (mounting plate portion 3f) can be turned upward. The power conversion unit 2 can be easily attached to or detached from the power conversion unit 2.

Further, the end portions of the support portion 3c and the fixing portion 3g of the unit mounting frame 3 on the back side (Y1 direction side) are located on the back side (Y1 direction side) of the power conversion unit main body 2a of the power conversion unit 2. .. As a result, with the power conversion unit 2 attached to the mounting plate portion 3f, the surface of the mounting plate portion 3f to which the power conversion unit 1 is attached faces upward (the surface to which the power conversion unit 2 is attached faces downward). Even if the unit mounting frame 3 is mounted, the power conversion unit main body 2a of the power conversion unit 2 does not come into contact with the mounted surface. Therefore, even when the power conversion unit 2 is attached to the mounting plate portion 3f, the surface of the mounting plate portion 3f to which the power conversion unit 1 is attached can be directed upward, so that the unit mounting frame 3 (mounting plate portion 3f) can be turned upward. The power conversion unit 2 can be easily attached to or detached from the power conversion unit 2.

With reference to FIG. 18, the configuration inside the housing 10 in a state where the unit mounting frame 3 containing the power conversion units 1 and 2 is taken out will be described. The I / F substrate 7 is omitted for simplification.

In the housing 10, the cooling fan 4 is arranged so as not to overlap the slide portion 12 when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction) (see FIG. 18).

The electronic device 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 an electronic device. From the bottom surface side (Z2 direction side) of the housing 10 to the top surface side (Z1 direction side) of the housing 10 via the openings A9, A10, A11, A12, A13, A14, A15, and A16 of the unit 5. The cooling air blown from the cooling fan 4 is configured to hit the inner wall surface of the upper surface of the housing 10. The openings A9, A10, A11, A12, A13, A14, A15, and A16 are examples of "second cooling openings" within the scope of the claims.

Further, the slide portion 12 has a fastening hole portion B4 (see FIG. 18) for fastening and fixing the unit mounting frame 3 on the slide surface S1 for sliding and moving the unit mounting frame 3.

The side surface portions 3d and 3e of the unit mounting frame 3 have the power conversion units 1 and 2 mounted (accommodated) on the unit mounting frame 3 on the side surfaces (X direction) of the power conversion units 1 and 2. It is configured to be separated from the sides of 1 and 2 (see FIG. 5). As a result, the side surface portions 3d and 3e (frame portion) of the unit mounting frame 3 are configured to be more grippable by the operator 200 with the power conversion units 1 and 2 mounted (accommodated) (see FIG. 19). ing.

The operator 200 holds the side surface portions 3d and 3e of the unit mounting frame 3 so as to avoid the relay connector 6 (see FIG. 5), and slides the unit mounting frame 3 on the slide surface of the slide portion 12 (see FIG. 19). It can be placed on S1 (see FIGS. 18 to 20) and slid to move.

Then, as shown in FIG. 20, the unit mounting frame 3 fastens and fixes the lower surface portion 3a of the unit mounting frame 3 to the slide portion 12 in the housing 10 by the screw member 93 in the housing 10. At the same time, the fixing portion 3g of the unit mounting frame 3 is fastened and fixed to the frame mounting portion 13 in the housing 10 by the screw member 94, so that the fixing portion 3g can be fastened and fixed in the housing 10.

The housing 10 including the slide portion 12 and the unit mounting frame 3 are made of a conductive member such as an aluminum material. Then, the power conversion units 1 and 2 mounted (accommodated) on the unit mounting frame 3 pass through the unit mounting frame 3, the slide portion 12, and the main body of the housing 10 to the lower surface 101a of the vehicle body of the railway vehicle 101 (FIG. 1). (See) is configured to be grounded to the railcar 101.

Further, since the fastening hole B7 of the fixing portion 3g of the unit mounting frame 3 has the above-mentioned Dharma hole shape, the screw member 94 is loosened from the fastened and fixed state (see FIG. 21) to loosen the unit mounting frame 3. By lifting it upward (in the Z1 direction) (see FIG. 22), the unit mounting frame 3 can be removed from the frame mounting portion 13 without removing the screw member 94 from the frame mounting portion 13 of the housing 10.

(Arrangement for cooling fan)
Next, the cooling fans of the heat radiating portions 1b and 2b, the openings A1 and A2 of the unit mounting frame 3, and the openings A9, A10, A11, A12, A13, A14, A15, and A16 of the electronic device unit 5. The arrangement with respect to 4 will be described with reference to FIGS. 23 to 25.

By fastening and fixing the unit mounting frame 3 to the housing 10 at the position shown in FIG. 23, the heat radiating portion 1b and the opening A1 are viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction). The cooling fan 4 and the cooling fan 4 are arranged so as to overlap each other (see FIG. 24). Further, the heat radiating portion 2b, the opening A2, and the cooling fan 4 are arranged so as to overlap each other when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction) (see FIG. 24).

Further, since the heat radiating portion 1b, the radiating portion 2b, and the cooling fan 4 are arranged so as to overlap each other when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction) (see FIGS. 23 and 24). The heat radiating parts 1b and 2b can be cooled by a common cooling fan 4.

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

Further, the unit mounting frame 3 is fastened and fixed to the housing 10 at the position shown in FIG. 23, so that the opening A1 provided in the lower surface portion 3a of the unit mounting frame 3 is blown from the cooling fan 4. It is configured to allow cooling air to pass through. The cooling air blown from the cooling fan 4 cools the heat radiating portion 1b and the radiating portion 2b, and passes through the opening A2 provided in the upper surface portion 3b of the unit mounting frame 3. Then, the cooling air that has cooled the heat radiation unit 1b and the heat radiation unit 2b passes through the openings A9, A10, A11, A12, A13, A14, A15, and A16 provided in the electronic device unit 5, and the housing. It hits the inner wall surface of the upper surface of the 10 and circulates in the housing 10.

(Effect of this embodiment)
In this embodiment, the following effects can be obtained.

In the present embodiment, as described above, the unit mounting frame 3 in which the power conversion unit 1 including the heat radiating unit 1b and the power conversion unit 2 including the heat radiating unit 2b are housed is housed in the housing 10. 1b and 2b are configured to be housed in a sealed housing 10. As a result, the heat radiating part 1b of the power conversion unit 1 and the heat radiating part 2b of the power conversion unit 2 are housed in the sealed housing 10, which causes foreign matter to adhere and stain from the outside of the housing 10. Can be prevented from invading. As a result, it is possible to suppress deterioration of the cooling function of the heat radiating portions 1b and 2b due to foreign matter adhesion and contamination.

Further, in the present embodiment, as described above, the unit mounting frame 3 is configured to accommodate the power conversion units 1 and 2. As a result, the power conversion units 1 and 2 can be housed in the unit mounting frame 3, so that when the power conversion units 1 and 2 are housed in the housing 10 from inside the housing 10, or when the power conversion units 1 and 2 are housed in the housing 10, the power conversion unit 1 and When the 2 is taken out from the housing 10, the power conversion units 1 and 2 can be stored at the same time, or the power conversion units 1 and 2 can be taken out at the same time. As a result, when the power conversion units 1 and 2 are housed in the housing 10, or as compared with the case where only one of the power conversion unit 1 or the power conversion unit 2 is housed in the unit mounting frame 3. , It is possible to suppress an increase in the amount of work when taking out the power conversion units 1 and 2 from the inside of the housing 10.

Further, in the present embodiment, as described above, the heat radiating unit 1b and the heat radiating unit 2b are configured to be cooled by the common cooling fan 4. As a result, the air in the sealed housing 10 can be circulated by the cooling fan 4, so that the heat radiating portions 1b and 2b can be cooled without taking in outside air. Further, by cooling the heat radiating unit 1b and the heat radiating part 2b by the common cooling fan 4, the increase in the number of parts is suppressed as compared with the case where the cooling fan 4 is provided corresponding to each of the heat radiating part 1b and the heat radiating part 2b. can do.

Further, in the present embodiment, as described above, the heat radiating portion 1b, the radiating portion 2b, and the cooling fan 4 are arranged so as to overlap each other when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction). .. As a result, when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction), the heat radiation unit 1b, the heat radiation unit 2b, and the cooling fan 4 overlap each other, so that the cooling air is easily blown from the common cooling fan 4. It is possible to cool both the heat radiating unit 1b and the heat radiating unit 2b.

Further, in the present embodiment, as described above, the cooling air blown from the cooling fan 4 passes through the unit mounting frame 3 on the side where the cooling fan 4 of the unit mounting frame 3 is arranged (Z2 direction side). It has an opening A1. As a result, the cooling air blown from the cooling fan 4 can be applied to the heat radiating portion 1b and the radiating portion 2b without being blocked by the unit mounting frame 3 by the opening A1 through which the cooling air passes. As a result, the heat radiating portion 1b and the radiating portion 2b can be cooled more efficiently than when the unit mounting frame 3 does not have the opening A1.

Further, in the present embodiment, as described above, the cooling fan 4 is provided on the bottom surface side (Z2 direction side) of the housing 10, and the heat radiation unit 1b is the heat radiation fin F1 and the heat radiation unit 1b is the heat radiation fin F2. By fastening and fixing the unit mounting frame 3 to the housing 10, the heat radiating portion 1b, the opening A1, and the cooling fan 4 are separated from each other when viewed from the direction (Z direction) perpendicular to the bottom surface of the housing 10. They are arranged so that they overlap. As a result, the unit mounting frame 3 is fastened and fixed to the housing 10 so that the heat radiating portion 1b, the opening A1 and the cooling fan 4 overlap when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction). Therefore, the heat radiating portion 1b can be arranged at a position where the cooling air blown from the cooling fan 4 hits through the opening A1 only by fastening and fixing the unit mounting frame 3 to the housing 10. .. As a result, the position of the heat radiating portion 1b, the opening A1, and the cooling fan 4 can be easily aligned. Further, since the cooling fan 4 is provided on the bottom surface side (Z2 direction side) of the housing 10, the cooling air can be applied to the heat radiating portions 1b and 2b from the bottom surface side (Z2 direction side) of the housing 10. .. As a result, the air in the sealed housing 10 can be circulated by utilizing the updraft generated by the heat radiated from the heat radiating parts 1b and 2b, so that the heat radiating part 1b and the heat radiating part can be circulated more efficiently. 2b can be cooled. Further, since the heat radiation unit 1b includes the heat radiation fin F1 and the heat radiation unit 1b includes the heat radiation fin F2, the heat radiation unit 1b does not include the heat radiation fin F1 and the heat radiation unit 1b does not include the heat radiation fin F2. Since the electric heating areas of 1b and 2b are expanded, the efficiency of heat dissipation can be improved.

Further, in the present embodiment, as described above, the electronic device unit 5 has an opening A9 through which the cooling air blown from the cooling fan 4 passes. As a result, the electronic device unit 5 has an opening A9 through which the cooling air passes, so that the cooling air that has cooled the heat radiating portion 1b and the radiating portion 2b is passed through the opening A9 to the inner wall surface of the upper surface of the housing 10. Can be applied to. As a result, the electronic device unit 5 is arranged so as to face the cooling fan 4 on the side opposite to the cooling fan 4 with respect to the power conversion units 1 and 2 housed in the unit mounting frame 3 in the housing 10. Even in this case, the heat taken from the heat radiating unit 1b and the heat radiating part 2b by the cooling air can be dissipated from the housing 10 as compared with the case where the electronic device unit 5 does not have the opening A9.

Further, in the present embodiment, as described above, the unit mounting frame 3 has a shape in which a plurality of frames are combined, and the unit mounting frame 3 is accommodated in a state where the power conversion units 1 and 2 are housed. The frame portion is configured to be grippable. As a result, the worker 200 can grip the frame portion of the unit mounting frame 3 in the state where the power conversion units 1 and 2 are housed, so that the power conversion units 1 and 2 are mounted (housed). The work of storing the unit mounting frame 3 in the housing 10 or the work of taking out the unit mounting frame 3 to which the power conversion units 1 and 2 are mounted (accommodated) can be performed more easily.

Further, in the present embodiment, as described above, the unit mounting frame 3 includes a lower surface portion 3a and a support portion 3c that supports the wiring C connected to the power conversion unit 2. As a result, by supporting the wiring C connected to the power conversion unit 2 by the support portion 3c, the unit mounting frame 3 can be stored in the housing 10 or the unit mounting frame 3 can be stored in the housing 10. It is possible to prevent the wiring C connected to the power conversion unit 2 from being sandwiched between the housing 10 and the unit mounting frame 3 during the taking-out operation. Further, 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, the power conversion unit 1 can be protected from the impact from the lower surface side. ..

Further, in the present embodiment, as described above, in the housing 10, the unit mounting frame 3 is in a state where the operator 200 holds the unit mounting frame 3 in which the power conversion unit 1 is housed inside the housing 10. A slide portion 12 is provided for moving the slide. As a result, the unit mounting frame 3 gripped by the worker 200 is slid on the slide surface S1 of the slide portion 12, so that the unit mounting frame 3 gripped by the worker 200 is mounted on the unit mounting frame 3 in the housing 10. It can be easily slid to a position.

Further, in the present embodiment, as described above, the cooling fan 4 is arranged so as not to overlap the slide portion 12 when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction). As a result, it is possible to prevent the slide portion 12 from blocking the cooling air blown from the cooling fan 4, so that the cooling fan 4 slides when viewed from the direction (Z direction) perpendicular to the bottom surface of the housing 10. Compared with the case where it overlaps with 12, the heat radiating unit 1b and the heat radiating unit 2b can be easily cooled.

[Modification example]
The embodiments disclosed this time should be considered as exemplary in all respects and not restrictive. The scope of the present invention is shown not by the description of the above embodiment but by the scope of claims, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims.

For example, in the above embodiment, the housing 10 is a unit mounting frame 3 (unit accommodating portion) in which a power conversion unit 1 (first power conversion unit) and a power conversion unit 2 (second power conversion unit) are housed. Although an example of storing two is shown, the present invention is not limited to this. For example, the housing may be configured to accommodate one unit accommodating portion inside, or may be configured to accommodate three or more unit accommodating portions.

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

Further, in the above embodiment, an example is shown in which the heat radiation unit 1b (first heat radiation unit) and the heat radiation unit 2b (second heat radiation unit) are configured to be cooled by a common cooling fan 4. The present invention is not limited to this. In the present invention, the first heat radiating unit and the second heat radiating unit may be configured to be cooled by separate cooling fans.

Further, in the above embodiment, when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction), the heat radiating unit 1b (first heat radiating part), the heat radiating part 2b (second heat radiating part), and the cooling fan 4 are arranged. Although an example in which they are arranged so as to overlap each other is shown, the present invention is not limited to this. In the present invention, only one of the first heat radiating portion and the second heat radiating portion may be arranged so as to overlap the cooling fan when viewed from the direction perpendicular to the bottom surface of the housing. .. Further, in the present invention, the cooling fan may be configured so as not to overlap the first heat radiating portion and the second heat radiating portion when viewed from the direction perpendicular to the bottom surface of the housing.

Further, in the above embodiment, the electronic device unit 5 includes a power conversion unit 1 (first power conversion unit) and a power conversion unit 2 (second power conversion unit) housed in a unit mounting frame 3 (unit accommodating portion) in the housing 10. An opening A9 (second) that is arranged so as to face the cooling fan 4 on the side opposite to the cooling fan 4 (Z1 direction side) with respect to the power conversion unit) and through which the cooling air blown from the cooling fan 4 passes. Although an example having a cooling opening) is shown, the present invention is not limited to this. In the present invention, the electronic device unit may be arranged at a position on the side surface side of the unit accommodating portion without providing the second cooling opening.

Further, in the above embodiment, the unit mounting frame 3 (unit accommodating portion) has a shape in which a plurality of frames are combined, and the power conversion unit 1 (first power conversion unit) and the power conversion unit 2 (first power conversion unit). An example is shown in which the frame portion of the unit mounting frame 3 is configured to be grippable while the two power conversion units) are housed, but the present invention is not limited to this. In the present invention, the unit accommodating portion may have a box shape surrounding the side surfaces of a plurality of power conversion units.

Further, 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. However, 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.

Further, in the above embodiment, the cooling fan 4 is arranged so as not to overlap the slide portion 12 when viewed from the direction perpendicular to the bottom surface of the housing 10 (Z direction). Not limited to this. In the present invention, the cooling fan is provided on the upper surface side of the housing opposite to the bottom surface side of the housing with respect to the slide portion provided on the bottom surface side of the housing, from the direction perpendicular to the bottom surface of the housing. As you can see, the cooling fan and the slide portion may be arranged so as to overlap each other.

1 Power conversion unit (1st power conversion unit)
1a Power conversion unit body 1b Heat dissipation unit (first heat dissipation unit)
2 Power conversion unit (second power conversion unit)
2a Power conversion unit body 2b Heat dissipation unit (second heat dissipation unit)
3 Unit mounting frame (unit housing)
3a Bottom part 3c Support part 4 Cooling fan 5 Electronic equipment unit 10 Housing 12 Slide part 100 Power conversion device (power conversion device for railroad vehicles)
101 Railroad vehicle A1 opening (first 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 fins F2 heat dissipation fins

Claims (11)

A power conversion unit including a power conversion unit main body and a heat dissipation unit for radiating heat inside the power conversion unit main body, and
A unit accommodating unit accommodating the power conversion unit and
It is provided with a sealed housing provided in a railroad vehicle and accommodating the unit accommodating portion inside.
By storing the unit accommodating portion in which the power conversion unit including the heat radiating unit is housed in the housing, the electric power for a railway vehicle is configured so that the heat radiating unit can be stored in the sealed housing. Conversion device. The unit accommodating unit is configured 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 radiating unit, which is a heat radiating unit for radiating heat inside the main body of the power conversion unit.
The power conversion device for a railroad vehicle according to claim 1, wherein the second power conversion unit includes a second heat dissipation unit that is the heat dissipation unit for radiating heat inside the main body of the power conversion unit. A cooling fan configured to cool the heat radiating portion by circulating air in the housing is further provided.
The power conversion device for a railway vehicle according to claim 2, wherein the first heat radiating unit and the second heat radiating unit are configured to be cooled by a common cooling fan. The first power conversion unit and the second power conversion unit are configured so that the first heat radiating unit and the second heat radiating unit are housed in the unit accommodating unit so as to face each other.
The electric power conversion for a railway vehicle according to claim 3, wherein the first heat radiating portion, the second heat radiating portion, and the cooling fan are arranged so as to overlap each other when viewed from a direction perpendicular to the bottom surface of the housing. Device. The unit accommodating portion according to claim 3 or 4, wherein the unit accommodating portion has a first cooling opening through which the cooling air blown from the cooling fan passes on the side of the unit accommodating portion where the cooling fan is arranged. Power converter for railroad vehicles. The cooling fan is provided on the bottom surface side of the housing.
The heat radiating portion includes heat radiating fins.
By fastening and fixing the unit accommodating portion to the housing, the first heat radiating portion, the first cooling opening, and the cooling fan overlap with each other when viewed from a direction perpendicular to the bottom surface of the housing. The electric power conversion device for a railroad vehicle according to claim 5, which is arranged in such a manner. An electronic device unit provided with an electronic device electrically connected to the power conversion unit is further provided.
The electronic device unit is arranged in the housing so as to face the cooling fan on the side opposite to the cooling fan with respect to the power conversion unit housed in the unit accommodating portion, and the cooling fan. The power conversion device for a railroad vehicle according to claim 6, further comprising a second cooling opening through which the cooling air blown from is passed. 4. The unit accommodating portion has a shape in which a plurality of frames are combined, and the frame portion of the unit accommodating portion can be gripped while the power conversion unit is accommodated. The electric power conversion device for a railway vehicle according to any one of 7 to 7. The unit accommodating portion is provided at a position corresponding to the lower surface of the first power conversion unit and a lower surface portion corresponding to the lower surface of the second power conversion unit, and is connected to the second power conversion unit. The electric power conversion device for a railroad vehicle according to claim 8, which includes a support portion for supporting the wiring. The housing is provided with a slide portion for sliding the unit housing portion while the operator holds the unit housing portion in which the power conversion unit is housed inside the housing. Item 8. The electric power conversion device for a railway vehicle according to Item 8. The power conversion device for a railroad vehicle according to claim 10, wherein the cooling fan is arranged so as not to overlap the slide portion when viewed from a direction perpendicular to the bottom surface of the housing.

Images