JP6950249B2 - Power converter for railroad vehicles - Google Patents

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 provided with a plurality of heat dissipation fins that dissipate heat of a power conversion device main body mounted on the railroad vehicle during traveling.

Conventionally, there is known a power conversion device for a railroad vehicle provided with a plurality of heat dissipation fins that dissipate heat of a power conversion device main body mounted on the railroad vehicle during traveling (see, for example, Patent Document 1).

The above-mentioned Patent Document 1 discloses a power conversion device for a railroad vehicle provided with a plurality of coolers (radiating fins) used for the power conversion device for driving a vehicle installed under the floor of the railroad vehicle. In the electric power conversion device for railway vehicles described in Patent Document 1, a plurality of coolers are arranged on the side surface of the electric power conversion device main body along the traveling direction of the vehicle in the underfloor space of the vehicle. .. Further, in the underfloor space of the vehicle, opening / closing doors are provided so as to sandwich a plurality of coolers on both sides in the traveling direction of the vehicle. This opening / closing door is attached so as to be openable and closable so that it opens when the running wind becomes strong due to the running of the railway vehicle. With this configuration, when the running wind is strong, the running wind is vigorously taken in as fresh outside air (low temperature air) along the direction of the radiating fins by the cooler arranged on the upstream side (the windward side of the running wind). , It is discharged to the outside in a warmed state through a cooler arranged on the downstream side (leeward side). As a result, in Patent Document 1, the temperature rise of the running wind is suppressed.

Japanese Unexamined Patent Publication No. 2001-24124

However, in the electric power conversion device for railroad vehicles described in Patent Document 1, even when the opening / closing door is open, the traveling wind that has passed through the cooler on the upstream side is taken into the cooler on the downstream side as it is. , The air warmed by removing the heat of the cooler is taken into the adjacent cooler on the downstream side. In addition, since the upstream cooler and the downstream cooler are arranged adjacent to each other along the traveling direction, most of the traveling wind taken into the downstream cooler passes through the upstream cooler. It becomes warm air. Therefore, there is a problem that the cooling performance of the cooler on the downstream side is lowered, and it is difficult to sufficiently improve the cooling performance (heat dissipation performance) of the cooler as a whole.

The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to have each of the plurality of heat radiating fins while efficiently utilizing the fresh outside air when the vehicle is running. The purpose of the present invention is to provide a power conversion device for railway vehicles that can fully exhibit cooling performance (heat dissipation performance).

The electric power conversion device for a railroad vehicle according to one aspect of the present invention is provided so that a plurality of fin portions extend along the traveling direction of the railroad vehicle, and dissipates heat of the power conversion device main body mounted on the railroad vehicle. The first heat radiating fin and the first heat radiating fin are arranged at a predetermined interval in the traveling direction, and a plurality of fin portions are provided so as to extend along the traveling direction to dissipate heat of the power conversion device main body. Between the two heat radiating fins, the first heat radiating fin and the second heat radiating fin, one end or the vicinity thereof in the alignment direction in which the fin portions are aligned orthogonal to the traveling direction of the first heat radiating fin, and the second heat radiating fin. Is arranged so as to connect to the other end or the vicinity thereof in the above-mentioned alignment direction, and when the railway vehicle is traveling, the air passing through the first heat radiating fin along the traveling direction and the second heat radiating fin are directed in the traveling direction. A partition member configured to partition the air passing along the line is provided , and the partition member is arranged so as to cover one side in the alignment direction of the first heat radiation fins, and the first heat radiation is dissipated when the railway vehicle is traveling. A first portion and a second portion provided separately from the first heat radiating fin, which are configured to separate the air passing through the fins along the traveling direction from the air passing on one side in the alignment direction of the first heat radiating fins. It is arranged so as to cover the other side in the alignment direction of the heat radiation fins, and when the railway vehicle is traveling, the air passing through the second heat radiation fins along the travel direction and the air passing through the other side in the alignment direction of the second heat radiation fins. Includes a second portion provided separately from the second radiating fin, which is configured to partition .

As described above, the electric power conversion device for a railroad vehicle according to one aspect of the present invention has one end of the first heat radiation fin in the alignment direction or one end thereof between the first heat radiation fin and the second heat radiation fin. It is arranged so as to connect the vicinity and the other end of the second heat radiating fins in the alignment direction or the vicinity thereof, and when the railroad vehicle is traveling, the air passing through the first heat radiating fins along the traveling direction and the first (2) A partition member configured to partition the heat radiation fin from the air passing along the traveling direction is provided. As a result, for example, when a railroad vehicle is traveling with the first radiating fin at the head (upper wind side), heat exchange with the traveling wind (fresh outside air) having a relatively low temperature is performed by the first radiating fin. After the cooling performance of the first heat radiating fin is exhibited, relatively high temperature air (exhausted air) can be discharged to the outside by passing near the second heat radiating fin in the rear stage (downstream side) from the partition member. can. At the same time, the traveling wind that has passed in the vicinity of the first heat radiation fin can be supplied to the second heat radiation fin in the subsequent stage (downstream side). That is, heat exchange can be performed by fresh outside air in both the first heat radiation fin and the second heat radiation fin. As a result, the cooling performance (heat dissipation performance) of each of the first heat radiating fin and the second heat radiating fin can be sufficiently exhibited while efficiently utilizing the fresh outside air.

Further , the partition member is arranged so as to cover one side of the first heat radiating fin in the alignment direction, and the air passing through the first heat radiating fin along the traveling direction and the first heat radiating fin are described above when the railroad vehicle is traveling. The first portion configured to separate the air passing through one side in the alignment direction and the second heat radiation fin are arranged so as to cover the other side in the alignment direction, and the second heat radiation fin is arranged so as to cover the other side in the alignment direction. Includes a second portion configured to separate the air passing along the traveling direction from the air passing through the other side of the second radiating fins in the alignment direction. As a result , for example, when a railroad vehicle is traveling with the first heat radiation fin at the head (windward side), the air warmed through the first heat radiation fin by the first portion is transferred to the first heat radiation fin. It will not leak from one side in the alignment direction. Further, the second portion prevents the air warmed by passing through the first heat radiation fin from being taken into the second heat radiation fin from the other side in the alignment direction of the second heat radiation fin. Therefore, as compared with the case where the first portion and the second portion are not provided, the air passing through the first heat radiation fin and the air passing through the second heat radiation fin can be more reliably separated. As a result, heat exchange by fresh outside air can be efficiently performed in both the first heat radiation fin and the second heat radiation fin.

In the electric power conversion device for a railroad vehicle according to the above one aspect, preferably, the partition member is from one end of the first heat radiation fin in the alignment direction or its vicinity to the other side in the alignment direction of the second heat radiation fin. It is configured to extend linearly to or near the end. With this configuration, for example, unlike the case where a curved partition member is provided, it is possible to save the trouble of bending the partition member. As a result, a partition member for partitioning the air passing through the heat radiation fin on the upstream side and the air passing through the heat radiation fin on the downstream side can be easily provided.

In the electric power conversion device for a railway vehicle according to the above one aspect, preferably, it is provided on one side in the alignment direction separately from the partition member, and when the railway vehicle travels in the first direction, the vicinity of the first heat radiation fin is formed. The first air guiding member that guides the passed air to the second heat radiating fin and the partition member are provided on the other side in the alignment direction separately from the first radiating fin, and are provided in the vicinity of the second heat radiating fin when the railway vehicle travels in the second direction. A second air guiding member that guides the air that has passed through the above to the first heat radiation fin is further provided. With this configuration, by providing the first air guide member and the second air guide member separately from the partition member, fresh outside air is sent to the heat radiating fin on the downstream side as compared with the case where only the partition member is provided. It can be sent efficiently.

In a configuration in which the power conversion device for a railway vehicle includes a first wind guide member and a second wind guide member, preferably, at least a part of each of the first wind guide member and the second wind guide member is a partition member. They are arranged so as to face each other. According to this configuration, when the railway vehicle travels in the first direction, the traveling wind that has passed in the vicinity of the first heat radiating fin is formed by the partition member and the first air guiding member facing each other. Since it passes through, it is efficiently guided to the second heat radiation fin. Further, when the railway vehicle travels in the second direction, the traveling wind that has passed in the vicinity of the second heat radiation fin passes through the air passage formed by the partition member and the second wind guide member facing each other. It is efficiently guided to the first heat radiation fin. Therefore, the effect of guiding fresh outside air to the heat radiation fins on the downstream side can be improved.

In a configuration in which the power conversion device for a railroad vehicle includes a first wind guide member and a second wind guide member, preferably, the first wind guide member first dissipates heat to one side in the alignment direction of the first heat radiation fins. The second air guide member is arranged at a predetermined distance from the fins, and the second air guide member is arranged on the other side of the second heat radiating fin in the alignment direction at a predetermined distance from the second heat radiating fin. The second heat radiation fin side of the air guide member extends at least to a line segment connecting the ends of the first heat radiation fin and the second heat radiation fin on one side in the alignment direction in a plan view, and extends to the second guide. The first heat radiation fin side of the wind member extends at least on a line segment connecting the ends of the first heat radiation fin and the second heat radiation fin on the other side in the alignment direction in a plan view. According to this configuration, when the railway vehicle travels in the first direction, the traveling wind that has passed in the vicinity of the first heat radiating fin passes between the first heat radiating fin and the first air guiding member, and then the first Since the first heat radiation fin and the second heat radiation fin are bent and guided in the direction of the partition member (inside in the alignment direction), the running wind is easily guided to the second heat radiation fin. Further, when the railway vehicle travels in the second direction, the traveling wind that has passed in the vicinity of the second heat radiating fin passes between the second heat radiating fin and the second air guiding member, and then the second heat radiating fin and the second heat radiating fin. Since it is bent and guided in the direction of the partition member (inside in the above-mentioned alignment direction) with the 1 heat radiation fin, the running wind is easily guided to the 1st heat radiation fin. Therefore, the effect of guiding fresh outside air to the heat radiation fins on the downstream side can be further improved.

In the electric power conversion device for a railway vehicle according to the above one aspect, preferably, the first heat radiation fin and the second heat radiation fin are installed in the underfloor space of the railway vehicle, and each of the first heat radiation fin and the second heat radiation fin The plurality of fin portions provided extend downward toward the railroad vehicle. With this configuration, the first heat radiation fin and the second heat radiation fin that cool the power conversion device main body when there is sufficient space for installing the first heat radiation fin and the second heat radiation fin below the power conversion device main body. The first heat radiating fin and the second heat radiating fin capable of sufficiently exerting the cooling performance (radiation performance) of each of the heat radiating fins can be easily installed.

In the electric power conversion device for a railway vehicle according to the above one aspect, preferably, the first heat radiation fin and the second heat radiation fin are installed in the underfloor space of the railway vehicle, and each of the first heat radiation fin and the second heat radiation fin The plurality of fin portions provided extend toward the side of the railroad vehicle. With this configuration, when there is sufficient space for installing the first heat radiation fin and the second heat radiation fin on the side of the power conversion device main body, the first heat radiation fin and the first heat radiation fin that cool the power conversion device main body are cooled. The first heat radiation fin and the second heat radiation fin capable of sufficiently exerting the cooling performance (heat radiation performance) of each of the two heat radiation fins can be easily installed. Further, by providing the first heat radiation fin and the second heat radiation fin on the side of the power conversion device main body, the first heat radiation fin and the second heat radiation fin are exposed to the side of the railroad vehicle when the railroad vehicle is running. Become. As a result, it is possible to take in the running wind with less turbulence as compared with the case where the fresh outside air is taken in from under the railroad vehicle to which other devices are attached. And it can be easily taken in by the second heat radiation fin. As a result, the cooling performance (heat dissipation performance) of the cooling unit can be further improved.

In the configuration in which the plurality of fin portions extend toward the side of the railroad vehicle, preferably, the upper wind guide member of the first wind guide member or the second wind guide member faces downward of the rail car. It is attached to the surface where it was, and passes near the upper side of the first heat radiation fin and the second heat radiation fin by the first heat radiation fin or the second heat radiation fin, the downward facing surface of the railway vehicle, and the upper wind guide member. The air passage of the running wind is formed. With this configuration, a part of the upper wind guide member can be replaced by a surface facing downward of the railway vehicle, so that it is necessary as compared with the case where the surface facing downward of the railway vehicle cannot be substituted. The upper air guiding member can be made smaller. In addition, by using the surface of a railroad vehicle, which has a relatively higher mechanical strength than the plate-shaped wind guide member, as the wall of the air passage, the frequency of parts replacement due to aged deterioration of the wind guide member due to the running wind can be reduced. Can be reduced.

In the configuration in which the plurality of fin portions extend toward the side of the railroad vehicle, it is preferable to cover the opening formed on the side surface of the power conversion device main body for inspecting the inside of the power conversion device main body. A removable cover member is further provided, and the cover member is provided at a place where the partition member is installed. With this configuration, the inside of the power conversion device main body can be accessed from the installation location of the partition member by removing the partition plate and the cover member from the power conversion device main body. As a result, even in a power conversion device provided with a partition member for improving cooling performance, maintenance work of the power conversion device main body can be easily performed by accessing the inside of the power conversion device main body from the vicinity of the cooling unit. Can be done.

In the configuration in which the cover member is provided at the installation location of the partition member, the partition member is preferably formed integrally with the cover member. With this configuration, the partition member and the cover member can be easily removed from the main body of the power conversion device, so that maintenance work of the main body of the power conversion device can be easily performed.

In the electric power conversion device for a railroad vehicle according to the above one aspect, preferably, a line passing through the center of the first heat radiation fin in the alignment direction and along the traveling direction and a traveling direction passing through the center of the second heat radiation fin in the alignment direction. It is almost the same as the line along. In this way, even when the first heat radiating fin and the second heat radiating fin overlap in the traveling direction and it is difficult to supply fresh outside air to the downstream side, in the present invention, the first heat radiating by the partition member. Both the fins and the second heat radiation fins can exchange heat with fresh outside air.

According to the present invention, as described above, the cooling performance (heat dissipation performance) of each of the plurality of heat radiation fins can be sufficiently exhibited while efficiently utilizing the fresh outside air when the vehicle is running.

It is a side view which showed the railroad vehicle by 1st Embodiment of this invention. It is a perspective view which looked at the railroad vehicle by 1st Embodiment of this invention from diagonally below. It is a bottom view which showed the cooling structure of the power conversion apparatus by 1st Embodiment of this invention. It is a bottom view which showed the cooling structure of the power conversion apparatus by 1st modification of 1st Embodiment of this invention. It is a bottom view which showed the cooling structure of the power conversion apparatus by the 2nd modification of 1st Embodiment of this invention. It is a bottom view which showed the cooling structure of the power conversion apparatus by the 3rd modification of 1st Embodiment of this invention. It is a bottom view which showed the cooling structure of the power conversion apparatus by the 4th modification of 1st Embodiment of this invention. It is a bottom view which showed the cooling structure of the power conversion apparatus by the 5th modification of 1st Embodiment of this invention. It is a side view which showed the railroad vehicle by 2nd Embodiment of this invention. It is a perspective view which looked at the railroad vehicle according to 2nd Embodiment of this invention from diagonally below. It is a side view which showed the cooling structure of the power conversion apparatus by 2nd Embodiment of this invention. It is a side view which showed the cooling structure of the power conversion apparatus by 1st modification of 2nd Embodiment of this invention. It is a side view which showed the cooling structure of the power conversion apparatus by the 2nd modification of 2nd Embodiment of this invention. It is a side view which showed the cooling structure of the power conversion apparatus by the 2nd modification of 2nd Embodiment of this invention.

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

[First Embodiment]
First, the configuration of the power conversion device 100 for the railway vehicle 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. The power conversion device 100 is an example of a "power conversion device for railroad vehicles" within the scope of the claims. Hereinafter, the traveling direction of the railroad vehicle 10 will be the X-axis direction, the pillow direction orthogonal to the X-axis direction will be the Y-axis direction, and the vertical direction orthogonal to both the X-axis direction and the Y-axis direction will be the Z-axis direction. ..

As shown in FIGS. 1 and 2, the power conversion device 100 according to the first embodiment of the present invention is installed in the underfloor space 11a of the vehicle body 11 of the railway vehicle 10. Here, the schematic configuration of the railway vehicle 10 will be briefly described. As shown in FIG. 1, the railroad vehicle 10 rotates the drive wheels 13 by using the vehicle body 11, the pantograph 12 that receives (collects) the electric power supplied to the overhead wire 2, and the electric power from the overhead wire 2. It includes an induction motor 14 (shown by a broken line) and a plurality of other devices 15 such as an air conditioner and a control device. Then, the electric power conversion device 100 has a role of converting the electric power from the overhead wire 2 by switching of a semiconductor element (not shown) to control the rotation of the induction motor 14 when the railway vehicle 10 is traveling.

(Configuration of power converter)
The power conversion device 100 includes a semiconductor device 20 that performs power conversion, and a cooling unit 30 that dissipates heat generated from a semiconductor element in the semiconductor device 20 to the outside air. Further, as shown in FIG. 2, the power conversion device 100 is suspended and fixed to the lower surface 11b of the vehicle body 11 in the underfloor space 11a of the vehicle body 11. Further, the semiconductor device 20 is arranged on the lower surface 11b side (Z1 side) of the vehicle body 11, and the cooling unit 30 is arranged on the line 1 side (Z2 side). The cooling unit 30 includes heat radiation fins 31 on the X1 side and heat radiation fins 32 on the X2 side, which are arranged at predetermined intervals along the X-axis direction in which the vehicle body 11 extends. The semiconductor device 20 is an example of a “power conversion device main body” within the scope of the claims. Further, the heat radiation fins 31 and 32 are examples of the "first heat radiation fin" and the "second heat radiation fin" in the claims, respectively.

The heat radiating fins 31 and 32 include a plurality of fin portions 31a and 32a extending vertically downward (toward the line 1 side) from the lower surface of the semiconductor device 20 and extending in a thin plate shape along the X-axis direction, respectively. .. The plurality of fin portions 31a and the fin portions 32a each have a fin pitch P1 and are arranged adjacent to each other so as to be arranged in the Y-axis direction. That is, the plurality of fin portions 31a and 32a are arranged so as to be aligned in the Y-axis direction orthogonal to the traveling direction (X-axis direction), and extend downward (Z2 direction) of the railway vehicle 10. There is. The number of fin portions 31a is equal to the number of fin portions 32a, and the heat radiation fins 31 and 32 have the same structure as each other. In the following description, the Y-axis direction in which the plurality of fin portions 31a and 32a are arranged may be referred to as the "alignment direction".

Further, as shown in FIG. 3, the heat radiation fins 31 and 32 are on the Y1 side and Y2 with respect to the center line 90 extending in the traveling direction (X-axis direction) at the center of the alignment direction (Y-axis direction) in the semiconductor device 20. It has a symmetrical shape on the side. Further, the heat radiating fins 31 and 32 are arranged symmetrically on the X1 side and the X2 side with respect to the center line 91 extending in the alignment direction (Y-axis direction) at the center of the traveling direction (X-axis direction) of the semiconductor device 20. .. As a result, a space S having a predetermined distance in the traveling direction (X-axis direction) is formed between the heat radiating fins 31 and the heat radiating fins 32.

Then, as shown in FIG. 1, when the railroad vehicle 10 travels in the direction of the arrow X1, the air in the vicinity of the track 1 is relatively flowed in the direction of the arrow X2 and is blown to the cooling portion 30 of the underfloor space 11a. In this case, the traveling wind passes through the gap between the heat radiating fins 31 (plurality of fin portions 31a) and the heat radiating fins 32 (plurality of fin portions 32a) (see FIG. 2) extending in the X-axis direction in the direction of arrow X2. Further, when the railroad vehicle 10 travels in the direction of arrow X2, the traveling wind passes through the gap between the heat radiation fins 32 and the heat radiation fins 31 in the direction of arrow X1 as in the case of traveling in the direction of arrow X1. As a result, the heat of the cooling unit 30 is configured to be exhausted to the atmosphere. In the following description, the case where the rolling stock 10 is traveling in the direction of arrow X1 and the case where the rolling stock 10 is traveling in the direction of arrow X2 are "first directions" within the scope of the claims. And "second direction". Further, in the drawings, the flow of air passing through the heat radiation fins 31 and 32 is indicated by a white arrow, and the traveling wind and the exhaust air discharged from the heat radiation fins 31 and 32 are indicated by a chain line arrow. Note that when the railroad vehicle 10 travels in the second direction, the direction is opposite to that when the railroad vehicle 10 travels in the first direction. Therefore, only the case where the railroad vehicle 10 travels in the first direction is shown. It is omitted when the railroad vehicle 10 travels in the second direction.

Here, in the first embodiment, as shown in FIGS. 2 and 3, the power conversion device 100 passes through the air passing through the heat radiation fins 31 and the heat radiation fins 32 with respect to the heat radiation fins 31 and the heat radiation fins 32. A partition plate 50 arranged so as to partition the air to be used, and a baffle plate 60 and a baffle plate 70 arranged so as to face the partition plate 50 are installed. The partition plate 50 is an example of a "partition member" within the scope of the claims. Further, the baffle plates 60 and 70 are examples of the "first baffle member" and the "second baffle member" in the claims, respectively. The detailed configurations of the partition plate 50 and the baffle plates 60 and 70 will be described below.

(Detailed configuration of partition plate)
As shown in FIG. 2, the partition plate 50 is arranged so as to extend vertically downward (side of the line 1) from the lower surface (Z2 side) of the semiconductor device 20 like the heat radiation fins 31 and 32. Further, the partition plate 50 is formed so that the length in the vertical direction is substantially equal to or slightly higher than the heat radiation fins 31 and 32.

As shown in FIG. 3, the partition plate 50 is composed of a partition portion 51, a side plate portion 52, and a side plate portion 53. Further, the partition plate 50 is a plate-shaped member, and the partition portion 51, the side plate portion 52, and the side plate portion 53 are integrally formed. The partition portion 51 is arranged between the heat radiation fins 31 and the heat radiation fins 32 in the X-axis direction. The side plate portion 52 is arranged on one side (Y1 side) of the heat radiation fins 31 in the alignment direction. The side plate portion 53 is arranged on the other side (Y2 side) of the heat radiation fins 32 in the alignment direction. The side plate portions 52 and 53 are examples of the "first portion" and the "second portion" of the claims, respectively.

As shown in FIG. 3, the partition portion 51 has a Y1 side end portion of the heat radiation fin 31 on the X2 side surface 31c and a Y2 side end portion of the heat radiation fin 32 on the X1 side surface 32c in a plan view. They are arranged so as to be connected in a straight line. That is, the space S formed between the heat radiation fins 31 and the heat radiation fins 32 by the partition portion 51 is in contact with the surface 31c on the X2 side of the heat radiation fins 31 and is connected to the heat radiation fins 31 and the heat radiation fins 32. It is partitioned into a space S2 that is in contact with the surface 32c on the X2 side and is connected to the heat radiation fin 32. With this configuration, it is possible to separate the air passing through the heat radiating fins 31 along the traveling direction from the air passing through the heat radiating fins 32 along the traveling direction.

The side plate portion 52 is arranged along the side surface of the heat radiation fin 31 on the Y1 side. Further, the side plate portion 52 is arranged so that one end on the X2 side is continuous with the end on the X1 side of the partition portion 51, and the other end on the X1 side is in the X1 direction with respect to the surface 31d on the X1 side of the heat radiation fin 31. It is arranged so as to have a protruding portion 52a. That is, the side plate portion 52 is arranged so as to cover the side surface of the heat radiation fin 31 on the Y1 side. With this configuration, when the railway vehicle 10 is traveling, it is possible to separate the air passing through the heat radiating fins 31 along the traveling direction from the air passing through the Y1 side of the heat radiating fins 31.

The side plate portion 53 is arranged along the side surface of the heat radiation fin 32 on the Y2 side. Further, the side plate portion 53 is arranged so that one end on the X1 side is continuous with the end on the X2 side of the partition portion 51, and the other end on the X2 side is in the X2 direction with respect to the surface 32d on the X2 side of the heat radiation fin 32. It is arranged so as to have a protruding portion 53a. That is, the side plate portion 53 is arranged so as to cover the side surface of the heat radiation fin 32 on the Y2 side. With this configuration, when the railway vehicle 10 is traveling, it is possible to separate the air passing through the heat radiating fins 32 along the traveling direction from the air passing through the Y2 side of the heat radiating fins 32.

As described above, in the partition plate 50 of the first embodiment, the partition portion 51 is configured to partition the air passing through the heat radiating fins 31 and the air passing through the heat radiating fins 32 when the railway vehicle 10 is traveling. ing. As a result, when the railway vehicle 10 travels in the first direction, the exhaust air discharged from the heat radiating fins 31 is formed by the partition portion 51 between the heat radiating fins 31 and the heat radiating fins 32 as shown in FIG. After passing through the space S1, the heat radiation fin 32 is discharged to the outside while passing through the Y2 side. That is, the exhaust air warmed by the heat radiating fins 31 is not directly taken into the heat radiating fins 32. Further, when the railway vehicle 10 travels in the second direction, the exhaust air discharged from the heat radiating fins 32 passes through the space S2 formed by the partition portion 51 between the heat radiating fins 32 and the heat radiating fins 31, and then passes through the space S2. It is discharged to the outside while passing through the Y1 side of the heat radiation fin 31. That is, the exhaust air warmed by the heat radiating fins 32 is not directly taken into the heat radiating fins 31. Therefore, by configuring the partition plate 50 as in the first embodiment, it is possible to exchange heat with fresh outside air in any of the heat radiation fins 31 and 32.

Further, in the partition plate 50 of the first embodiment, the partition portion 51 has a Y1 side end portion on the X2 side surface 31c of the heat radiation fin 31 and a Y2 side end portion on the X1 side surface 32c of the heat radiation fin 32. And are arranged so as to be connected in a straight line in a plan view.

Further, in the partition plate 50 of the first embodiment, the side plate portion 52 separates the air passing through the heat radiating fins 31 along the traveling direction and the air passing through the Y1 side of the heat radiating fins 31 when the railway vehicle 10 is traveling. It is configured to partition. As a result, when the railway vehicle 10 travels in the first direction, the air passing through the heat radiating fins 31 does not leak from the Y1 side of the heat radiating fins 31. Therefore, as compared with the configuration without the side plate portion 52, it is surely prevented that the exhaust air warmed by the heat radiating fin 31 is mixed with the traveling wind (fresh outside air) that passes through the space S2 and is taken into the heat radiating fin 32. It is possible. Further, when the railway vehicle 10 travels in the second direction, the exhaust air warmed by the heat radiating fins 32 is not taken in from the Y1 side of the heat radiating fins 31 when passing through the Y1 side of the heat radiating fins 31. Therefore, as compared with the case where the side plate portion 52 is not provided, it is possible to more reliably partition the air passing through the heat radiating fins 31 and the air passing through the heat radiating fins 32.

Further, in the partition plate 50 of the first embodiment, the side plate portion 53 separates the air passing through the heat radiating fins 32 along the traveling direction and the air passing through the Y2 side of the heat radiating fins 32 when the railway vehicle 10 is traveling. It is configured to partition. As a result, when the railway vehicle 10 travels in the first direction, the exhaust air warmed by the heat radiation fins 31 is not taken in from the Y2 side of the heat radiation fins 32 when passing through the Y2 side of the heat radiation fins 32. .. Therefore, as compared with the configuration without the side plate portion 53, the exhaust air warmed by the heat radiating fins 31 is mixed with the traveling wind (fresh outside air) that passes in the vicinity of the heat radiating fins 31 and passes through the heat radiating fins 32. It can be reliably prevented. Further, when the railway vehicle 10 travels in the second direction, the air passing through the heat radiating fins 32 does not leak from the Y2 side of the heat radiating fins 32. Therefore, as compared with the case where the side plate portion 53 is not provided, it is possible to more reliably partition the air passing through the heat radiating fins 31 and the air passing through the heat radiating fins 32.

(Detailed configuration of the baffle plate)
As shown in FIGS. 2 and 3, the baffle plates 60 and 70 are provided separately from the partition plate 50 and are arranged so as to face the partition plate 50. Further, as shown in FIG. 2, the lengths of the baffle plates 60 and 70 in the vertical direction are substantially equal to or slightly higher than those of the heat radiation fins 31 and 32, similar to the partition plate 50. It is formed like this. Further, the baffle plates 60 and 70 are formed in a plate shape having a thickness substantially equal to that of the partition plate 50.

The baffle plate 60 is composed of a parallel portion 61 and an inclined portion 62. The parallel portion 61 is arranged so as to face the side plate portion 52 and the partition portion 51 on the X1 side with a predetermined interval on the Y1 side. The inclined portion 62 is arranged so as to face the partition portion 51 on the Y1 side with a predetermined interval.

The parallel portion 61 is arranged on the line segment 94 on the Y1 side of the line segment 92 connecting the ends on the Y1 side of the heat radiation fins 31 and 32 so as to be substantially parallel to the side plate portion 52 in a plan view. There is. Further, the parallel portion 61 is arranged so that the end portion on the X1 side is at the same position as the side plate portion 52 in the X-axis direction. Further, in the parallel portion 61, the end portion on the X2 side is arranged on the X2 side of the end portion on the X1 side of the partition portion 51 and on the X1 side of the center line 91. With this configuration, an air guide path A1 extending in the X-axis direction is formed between the side plate portion 52 on the Y1 side of the heat radiating fin 31 and the parallel portion 61 through which air passes when the railway vehicle 10 is traveling.

The inclined portion 62 is arranged so that the end portion on the X1 side is continuous with the end portion of the parallel portion 61. Further, the inclined portion 62 is arranged so that the end portion on the X2 side is on the line segment 92 and slightly on the X2 side (near the center between the heat radiation fin 31 and the heat radiation fin 32) with respect to the center line 91. ing. Further, the inclined portion 62 is arranged so that the end portion on the X1 side is between the surface 31c on the X2 side of the heat radiation fin 31 and the center line 91 and on the line segment 94. Further, the inclined portion 62 is arranged so as to be inclined from the Y1 side toward the Y2 direction from the X1 side toward the X2 direction. Further, the inclined portion 62 is arranged so that the end portion on the X2 side reaches the end portion on the Y1 side of the space S2 (on the line segment 92). With this configuration, the air duct A1 is connected to the space S2 at the end of the air duct A1 on the X2 side while changing the direction of the space S2.

The baffle plate 70 is composed of a parallel portion 71 and an inclined portion 72. The parallel portion 71 is arranged so as to face the side plate portion 53 and the partition portion 51 on the X2 side with a predetermined interval on the Y2 side. The inclined portion 72 is arranged so as to face the partition portion 51 on the Y2 side with a predetermined interval.

The parallel portion 71 is arranged on the line segment 95 on the Y2 side of the line segment 93 connecting the ends on the Y2 side of the heat radiation fins 31 and 32 so as to be substantially parallel to the side plate portion 53 in a plan view. There is. Further, the parallel portion 71 is arranged so that the end portion on the X2 side is at the same position as the side plate portion 53 in the X-axis direction. Further, the parallel portion 71 is arranged so that the end portion on the X1 side is on the X1 side of the end portion on the X2 side of the partition portion 51 and on the X2 side of the center line 91. With this configuration, an air guide path A2 extending in the X-axis direction is formed between the side plate portion 53 on the Y2 side of the heat radiating fin 32 and the parallel portion 71 through which air passes when the railway vehicle 10 is traveling.

The inclined portion 72 is arranged so that the end portion on the X2 side is continuous with the end portion of the parallel portion 71. Further, the inclined portion 72 is arranged so that the end portion on the X1 side is on the line segment 93 and slightly closer to the X1 side than the center line 91 (near the center between the heat radiation fin 31 and the heat radiation fin 32). ing. That is, the inclined portion 72 is arranged so that the end portion on the X2 side is between the surface 32c on the X1 side of the heat radiation fin 32 and the center line 91 and on the line segment 95. Further, the inclined portion 72 is arranged so as to go from the Y2 side to the Y1 side in the direction from the X2 side to the X1 side. Further, the inclined portion 72 is arranged so that the end portion on the X1 side reaches the end portion on the Y2 side of the space S1. With this configuration, the air guide path A2 is connected to the space S2 at the end of the air guide path A2 on the X1 side while changing the direction of the space S1.

As described above, the baffle plate 60 of the first embodiment is provided separately from the partition plate 50 and is arranged so as to face the partition plate 50. As a result, when the railway vehicle 10 travels in the first direction, the traveling wind (fresh outside air) that has passed through the Y1 side of the heat radiation fins 31 is guided to the heat radiation fins 32 by the baffle plate 60. Therefore, it is possible to efficiently send the traveling wind (fresh outside air) to the heat radiating fins 32 on the downstream side when the railway vehicle 10 travels in the first direction, as compared with the case where only the partition plate 50 is provided. ..

Further, in the baffle plate 60 of the first embodiment, the parallel portion 61 is arranged so as to face the side plate portion 52 on the Y1 side at a predetermined distance, and the inclined portion 62 is arranged on the partition portion 51. On the other hand, they are arranged so as to face each other on the Y1 side with a predetermined interval. As a result, when the railway vehicle 10 travels in the first direction, the traveling wind (fresh outside air) that has passed through the Y1 side of the heat radiating fin 31 is sent to the parallel portion 61 and the side plate portion 52 (and the inclined portion 62 and the partition portion 51). Since it passes through the air guide path A1 formed by (and), it is efficiently guided to the heat radiation fin 32. Therefore, when the railway vehicle 10 travels in the first direction, it is possible to improve the effect of guiding the traveling wind (fresh outside air) to the heat radiating fins 32 on the downstream side.

Further, in the baffle plate 60 of the first embodiment, the baffle path A1 is configured to be connected to the space S2 while changing the direction of the baffle path S2 at the end of the baffle path A1 on the X2 side. ing. As a result, when the railcar 10 travels in the first direction, the traveling wind (fresh outside air) that has passed through the Y1 side of the heat radiating fins 31 passes through the air guide path A1 (between the heat radiating fins 31 and the baffle plate 60). After passing through, the heat radiation fins 31 and the heat radiation fins 32 are bent and guided in the direction of the partition plate 50 (inside in the alignment direction), so that the traveling wind is easily guided to the heat radiation fins 31. Therefore, when the railway vehicle 10 travels in the first direction, the effect of guiding the traveling wind (fresh outside air) to the heat radiating fins 32 on the downstream side can be further improved.

Further, the baffle plate 70 of the first embodiment is provided separately from the partition plate 50 and is arranged so as to face the partition plate 50. As a result, when the railway vehicle 10 travels in the second direction, the traveling wind (fresh outside air) that has passed through the Y2 side of the heat radiation fins 32 is guided to the heat radiation fins 31 by the baffle plate 70. Therefore, it is possible to efficiently send the traveling wind (fresh outside air) to the heat radiating fin 31 on the downstream side when the railway vehicle 10 travels in the first direction, as compared with the case where only the partition plate 50 is provided. ..

Further, in the baffle plate 70 of the first embodiment, the parallel portion 71 is arranged so as to face the side plate portion 53 on the Y2 side at a predetermined interval, and the inclined portion 72 is arranged on the partition portion 51. On the other hand, they are arranged so as to face each other on the Y2 side with a predetermined interval. As a result, when the railway vehicle 10 travels in the second direction, the traveling wind (fresh outside air) that has passed through the Y2 side of the heat radiating fins 32 becomes the parallel portion 71, the side plate portion 53, and (and the inclined portion 72 and the partition portion 51). ), So that it is efficiently guided to the heat radiation fin 31. Therefore, when the railway vehicle 10 travels in the second direction, it is possible to improve the effect of guiding the traveling wind (fresh outside air) to the heat radiation fins 31 on the downstream side.

Further, in the baffle plate 70 of the first embodiment, the baffle path A2 is configured to be connected to the space S1 while changing the direction of the baffle path S1 at the end of the baffle path A2 on the X1 side. ing. As a result, when the railcar 10 travels in the second direction, the traveling wind (fresh outside air) that has passed through the Y2 side of the heat radiating fins 32 passes through the air guide path A2 (between the heat radiating fins 31 and the baffle plate 70). After passing through, the heat radiating fin 32 and the heat radiating fin 31 are bent and guided in the direction of the partition plate 50 (inside in the alignment direction), so that the traveling wind is easily guided to the heat radiating fin 32. Therefore, when the railway vehicle 10 travels in the second direction, the effect of guiding the traveling wind (fresh outside air) to the heat radiation fins 31 on the downstream side can be further improved.

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

In the first embodiment, as described above, in the power conversion device 100, between the heat radiation fins 31 and the heat radiation fins 32, the alignment direction (Y-axis direction) in which the fin portions 31a are aligned orthogonal to the traveling direction of the heat radiation fins 31. Is arranged so as to connect the end of one side (Y1 side) and the end of the heat radiation fin 32 on the other side (Y2 side) in the alignment direction, and travels on the heat radiation fin 31 when the railway vehicle 10 travels. A partition plate 50 configured to partition the air passing along the direction (X-axis direction) and the air passing along the traveling direction of the heat radiating fin 32 is provided. As a result, for example, when the railway vehicle 10 is traveling with the heat radiating fin 31 at the head (wind side), heat exchange with the traveling wind (fresh outside air) having a relatively low temperature is performed by the heat radiating fin 31 to dissipate heat. After the cooling performance of the fins 31 is exhibited, relatively high temperature air (exhausted air) can be discharged to the outside by passing near the heat radiating fins 32 in the subsequent stage (downstream side) of the partition plate 50. At the same time, the traveling wind that has passed in the vicinity of the heat radiating fins 31 can be supplied to the heat radiating fins 32 in the subsequent stage (downstream side). That is, heat exchange can be performed by fresh outside air in both the heat radiation fins 31 and the heat radiation fins 32. As a result, the cooling performance (heat dissipation performance) of each of the heat dissipation fins 31 and the heat dissipation fins 32 can be fully exhibited while efficiently utilizing the fresh outside air.

Further, in the first embodiment, the partition plate 50 is arranged so as to cover one side (Y1 side) of the heat radiating fins 31 in the alignment direction, and the heat radiating fins 31 are placed in the traveling direction (X-axis) when the railway vehicle 10 is traveling. The side plate portion 52 configured to separate the air passing along the direction) from the air passing through one side (Y1 side) of the heat radiation fins 32 in the alignment direction, and the other side of the heat radiation fins 32 in the alignment direction. Arranged so as to cover (Y2 side), when the railroad vehicle 10 is traveling, the air passing through the heat radiation fins 32 along the travel direction (X-axis direction) and the other side (Y2 side) of the heat radiation fins 32 in the alignment direction. Includes a side plate portion 53, which is configured to partition the air passing through. As a result, when the railway vehicle 10 is traveling with the heat radiating fins 31 at the head (windward side), the air warmed by the side plate portion 52 passing through the heat radiating fins 31 is in the alignment direction of the heat radiating fins 31. It will not leak from one side (Y1 side). Further, the side plate portion 53 prevents the air warmed by passing through the heat radiating fins 31 from being taken into the heat radiating fins 32 from the other side (Y2 side) of the heat radiating fins 32 in the alignment direction. Therefore, as compared with the case where the side plate portions 52 and 53 are not provided, the air passing through the heat radiating fins 31 and the air passing through the heat radiating fins 32 can be more reliably separated. As a result, heat exchange with fresh outside air can be efficiently performed in both the heat radiation fins 31 and the heat radiation fins 32.

Further, in the first embodiment, from the end of the heat radiation fin 31 on one side (Y1 side) in the alignment direction or its vicinity to the end of the heat radiation fin 32 on the other side (Y2 side) in the alignment direction or its vicinity. The partition plate 50 is configured so as to extend linearly. As a result, unlike the case where a curved partition plate is provided, for example, it is possible to save the trouble of bending the partition plate 50. As a result, the partition plate 50 that separates the air passing through the heat radiation fin on the upstream side and the air passing through the heat radiation fin on the downstream side can be easily provided.

Further, in the first embodiment, the power conversion device 100 is provided on one side (Y1 side) in the alignment direction separately from the partition plate 50, and when the railway vehicle 10 travels in the first direction (X1 direction). , The baffle plate 60 that guides the air that has passed in the vicinity of the heat radiating fin 31 to the heat radiating fin 32 and the partition plate 50 are provided on the other side (Y2 side) in the alignment direction separately from the second direction of the railway vehicle 10. Further provided is a baffle plate 70 that guides the air that has passed in the vicinity of the heat radiating fin 32 to the heat radiating fin 31 when traveling in the (X2 direction). As a result, when the railway vehicle 10 travels in the first direction (X1 direction), the traveling wind that has passed in the vicinity of the heat radiating fins 31 is guided to the heat radiating fins 32 by the partition plate 50 and the baffle plate 60. Further, when the railway vehicle 10 travels in the second direction (X2 direction), the traveling wind that has passed in the vicinity of the heat radiating fins 32 is guided to the heat radiating fins 31 by the partition plate 50 and the baffle plate 70. Therefore, by providing the baffle plate 60 and the baffle plate 70 separately from the partition plate 50, the effect of guiding fresh outside air to the heat radiating fin on the downstream side is improved as compared with the case where only the partition plate 50 is provided. be able to.

Further, in the first embodiment, the baffle plate 60 and the baffle plate 70 are arranged so that at least a part thereof faces the partition plate 50, respectively. As a result, when the railway vehicle 10 travels in the first direction (X1 direction), the traveling wind that has passed in the vicinity of the heat radiating fins 31 is formed by the partition plate 50 and the baffle plate 60 facing each other. Since it passes through the path A1, it is efficiently guided to the heat radiation fin 32. Further, when the railway vehicle 10 travels in the second direction (X2 direction), the traveling wind that has passed in the vicinity of the heat radiating fins 32 is formed by the partition plate 50 and the baffle plate 70 facing each other. Since it passes through A2, it is efficiently guided to the heat radiation fin 31. Therefore, the effect of guiding fresh outside air to the heat radiation fins on the downstream side can be further improved.

Further, in the first embodiment, the baffle plate 60 is arranged on one side (Y1 side) of the heat radiating fins 31 in the alignment direction at a predetermined distance from the heat radiating fins 31, and the baffle plate 70 is arranged. The heat radiating fins 32 are arranged on the other side (Y2 side) in the alignment direction at a predetermined distance from the heat radiating fins 32, and the heat radiating fins 32 side (X2 side) of the baffle plate 60 dissipate heat in a plan view. The fins 31 and the heat radiating fins 32 extend at least to the line segment 92 connecting the ends on one side (Y1 side) in the alignment direction, and the heat radiating fins 31 side (X1 side) of the baffle plate 70 are flat. Visually, it extends at least to the line segment 92 connecting the ends of the heat radiating fins 31 and the heat radiating fins 32 on the other side (Y2 side) in the alignment direction. As a result, when the railcar 10 travels in the first direction (X1 direction), the traveling wind that has passed in the vicinity of the heat radiating fins 31 is formed between the heat radiating fins 31 and the baffle plate 60. After passing through, the heat radiation fins 31 and the heat radiation fins 32 are bent and guided in the direction of the partition plate 50 (inside in the alignment direction, Y2 side), so that the running wind is easily guided to the heat radiation fins 32. .. Further, when the railcar 10 travels in the second direction (X2 direction), the traveling wind that has passed in the vicinity of the heat radiating fins 32 passes through the air guide path A2 formed between the heat radiating fins 32 and the baffle plate 70. After passing through, the heat radiating fin 32 and the heat radiating fin 31 are bent and guided in the direction of the partition plate 50 (inside in the alignment direction, Y1 side), so that the traveling wind is easily guided to the heat radiating fin 31. Therefore, the effect of guiding fresh outside air to the heat radiation fins on the downstream side can be further improved.

Further, in the first embodiment, the heat radiating fins 31 and the heat radiating fins 32 are installed in the underfloor space 11a of the railway vehicle 10, and a plurality of fin portions 31a and 32a provided in the heat radiating fins 31 and the heat radiating fins 32, respectively. Extends downward (Z2 direction) of the railroad vehicle 10. As a result, when there is sufficient space for installing the heat radiation fins 31 and the heat radiation fins 32 below the semiconductor device 20, the cooling performance (heat dissipation) of each of the heat radiation fins 31 and the heat radiation fins 32 for cooling the semiconductor device 20. The heat radiating fins 31 and the heat radiating fins 32 that can fully exhibit the performance) can be easily installed.

Further, in the first embodiment, a line passing through the center of the heat radiation fins 31 in the alignment direction and along the traveling direction (X-axis direction) and a traveling direction (X-axis direction) passing through the center of the heat radiation fins 32 in the alignment direction. The line along the line is substantially coincident with the center line 90. In this way, even when the heat radiating fins 31 and the heat radiating fins 32 overlap in the traveling direction (X-axis direction) and it is difficult for fresh outside air to be supplied to the downstream side, the heat radiating fins 31 are provided by the partition plate 50. Heat exchange with fresh outside air can be performed in any of the heat radiation fins 32 and the heat radiation fins 32.

(First modification)
Next, a first modification of the first embodiment will be described with reference to FIG. In the first modification of the first embodiment, an example in which the baffle plates 60 and 70 are not provided will be described. In the figure, the same reference numerals are given to the same configurations as those in the first embodiment.

The power conversion device of the first modification of the first embodiment has a configuration in which the baffle plates 60 and 70 are omitted from the configuration of the first embodiment. That is, as shown in FIG. 4, the power conversion device of the first modification of the first embodiment has the heat radiation fins 31 with respect to the set of heat radiation fins 31 and 32 of the cooling unit 30 when the railway vehicle 10 is traveling. The partition plate 50 is provided so as to partition the air passing along the traveling direction from the air passing along the traveling direction and the air passing through the heat radiating fin 32 along the traveling direction. Further, the partition plate 50 includes a side plate portion 52 configured to partition the air passing through the heat radiating fins 31 along the traveling direction and the air passing through the Y1 side of the heat radiating fins 31 when the railway vehicle 10 is traveling. A side plate portion 53 configured to partition the air passing through the heat radiating fins 32 along the traveling direction and the air passing through the Y2 side of the heat radiating fins 32 is provided. Therefore, in the power conversion device of the first modification of the first embodiment, it is possible to efficiently exchange heat with fresh outside air in any of the heat radiation fins 31 and 32 as in the first embodiment. .. Further, in the power conversion device of the first modification of the first embodiment, since the baffle plates 60 and 70 are not provided, it is possible to save the trouble of installing the baffle plates 60 and 70.

(Second modification)
Next, a second modification of the first embodiment will be described with reference to FIG. In the second modification of the first embodiment, an example in which the shape and arrangement of the baffle plate is different from that of the first embodiment will be described. In the figure, the same reference numerals are given to the same configurations as those in the first embodiment.

In the power conversion device of the second modification of the first embodiment, the baffle plate 260 and the baffle plate 270 which are different in shape and arrangement from the baffle plates 60 and 70 in the first embodiment are provided. The configuration other than the baffle plate is the same as that of the first embodiment. The details of the baffle plates 260 and 270 will be described below.

As shown in FIG. 5, the baffle plate 260 is provided separately from the partition plate 50 and is arranged so as to face the partition plate 50. Further, the baffle plate 260 includes an inclined portion 261 arranged so as to be separated by a predetermined interval on the Y1 side with respect to the partition portion 51. Further, the end portion of the baffle plate 260 on the X2 side is arranged at the end portion on the Y1 side of the surface 32c on the X1 side of the heat radiation fin 32. Further, the baffle plate 260 is arranged on the center line 91 at the end on the X1 side, at a predetermined distance on the Y1 side with respect to the line segment 92, and on the line segment 294 parallel to the line segment 92. There is. With this configuration, between the partition plate 50 and the baffle plate 260, air passing through the Y1 side of the heat radiating fin 31 when traveling in the first direction (X1 direction) of the railway vehicle 10 is passed through the heat radiating fin 32. An air guide path A21 connected to the space S2 is formed so as to guide in the direction of the surface 32c on the X1 side.

The baffle plate 270 is provided separately from the partition plate 50, and is arranged so as to face the partition plate 50. Further, the baffle plate 270 includes an inclined portion 271 arranged so as to be separated by a predetermined interval on the Y2 side with respect to the partition portion 51. Further, the end portion of the baffle plate 270 on the X1 side is arranged at the end portion on the Y2 side of the surface 31c on the X2 side of the heat radiation fin 31. Further, the baffle plate 270 is arranged on the center line 91 at the end on the X2 side, at a predetermined distance on the Y1 side with respect to the line segment 93, and on the line segment 295 parallel to the line segment 92. There is. With this configuration, between the partition plate 50 and the baffle plate 270, air passing through the Y2 side of the heat radiating fin 32 when traveling in the second direction (X2 direction) of the railway vehicle 10 is passed through the heat radiating fin 31. An air guide path A22 connected to the space S1 is formed so as to guide in the direction of the surface 32c on the X2 side.

As described above, in the power conversion device in the second modification of the first embodiment, the air guide plate 260 allows the air passing through the Y1 side of the heat radiating fin 31 to be passed through the railroad vehicle 10 in the first direction. It is configured to guide the heat radiation fin 32 in the direction of the surface 32c on the X1 side. Further, the baffle plate 270 is configured so that the air passing through the Y2 side of the heat radiation fin 32 is guided in the direction of the surface 31c on the X2 side of the heat radiation fin 31 when the railway vehicle 10 travels in the second direction. .. Therefore, also in the power conversion device in the second modification of the first embodiment, as in the first embodiment, when the railway vehicle 10 is traveling, the traveling wind (fresh outside air) is efficiently sent to the radiating fins on the downstream side. Can be guided. The effect of the partition plate 50 is the same as that of the first embodiment.

(Third modification example)
Next, a third modification of the first embodiment will be described with reference to FIG. In the third modification of the first embodiment, an example in which the shape and arrangement of the baffle plate are different from those of the first embodiment and the second modification of the first embodiment will be described. In the figure, the same reference numerals are given to the same configurations as those of the first embodiment and the second modification of the first embodiment.

In the power conversion device of the third modification of the first embodiment of the present invention, the baffle plate 360 and the baffle guide plate have a shape and arrangement slightly different from those of the baffle plates 260 and 270 in the second modification of the first embodiment. A plate 370 is provided. The configuration other than the baffle plate is the same as that of the first embodiment and the second modification of the first embodiment. The details of the baffle plates 360 and 370 will be described below.

As shown in FIG. 6, the baffle plate 360 extends in the X1 direction from the inclined portion 261 configured in the same manner as the second modification of the first embodiment and the end portion of the inclined portion 261 on the X1 side. A parallel portion 362 formed is provided. Specifically, the end of the parallel portion 362 on the X1 side is arranged on the line segment 294 near the center of the surface 31c on the X2 side of the heat radiation fin 31 and the center line 91. With this configuration, between the partition plate 50 and the baffle plate 360, air passing through the Y1 side of the heat radiating fin 31 when traveling in the first direction (X1 direction) of the railway vehicle 10 is passed through the heat radiating fin 32. An air guide path A31 connected to the space S2 is formed so as to guide in the direction of the surface 32c on the X1 side.

Further, the baffle plate 370 has an inclined portion 271 configured in the same manner as in the second modification of the first embodiment, and a parallel portion formed so as to extend in the X2 direction from the end portion of the inclined portion 271 on the X2 side. 372 and. Specifically, the parallel portion 372 has an end portion on the X2 side arranged on the line segment 295 near the center of the surface 32c on the X1 side of the heat radiation fin 32 and the center line 91. With this configuration, between the partition plate 50 and the baffle plate 370, air passing through the Y2 side of the heat radiating fin 32 when traveling in the second direction (X2 direction) of the railway vehicle 10 is passed through the heat radiating fin 31. An air guide path A32 connected to the space S2 is formed so as to guide in the direction of the surface 31c on the X2 side.

As described above, in the power conversion device in the third modification of the first embodiment, the baffle plate 360 allows the air passing through the Y1 side of the heat radiating fin 31 to be passed through the railroad vehicle 10 in the first direction. It is configured to guide the heat radiation fin 32 in the direction of the surface 32c on the X1 side. Further, the baffle plate 370 is configured so that the air passing through the Y2 side of the heat radiation fin 32 is guided in the direction of the surface 31c on the X2 side of the heat radiation fin 31 when the railway vehicle 10 travels in the second direction. .. Therefore, also in the power conversion device in the third modification of the first embodiment, as in the first embodiment and the second modification of the first embodiment, when the railway vehicle 10 is traveling, the heat radiation fins on the downstream side are released. The running wind (fresh outside air) can be efficiently guided to. The effect of the partition plate 50 is the same as that of the first embodiment.

(Fourth modification)
Next, a fourth modification of the first embodiment will be described with reference to FIG. 7. In the fourth modification of the first embodiment, the heat radiation fins so that the line 490 passing through the center of the heat radiation fins 31 in the alignment direction and the line 496 passing through the center of the heat radiation fins 32 in the alignment direction do not match in the alignment direction. An example in which 31 and 32 are arranged will be described. In the figure, the same reference numerals are given to the same configurations as those in the first embodiment.

In the fourth modification of the first embodiment, as shown in FIG. 7, the cooling unit 430 includes a line 490 passing through the center of the heat radiation fins 31 in the alignment direction and a line 496 passing through the center of the heat radiation fins 32 in the alignment direction. , Are arranged so that the heat radiation fins 31 and 32 do not match in the alignment direction. In this configuration, the partition plate 450 includes a partition portion 451 that is gently inclined with respect to the X-axis direction as compared with the first embodiment. As a result, the space S4 between the heat radiating fins 31 and the heat radiating fins 32 comes into contact with the space S41 which is in contact with the surface 31c on the X2 side of the heat radiating fins 31 and is connected to the heat radiating fins 31 and the surface 32c on the X1 side of the heat radiating fins 32. It is partitioned into a space S42 connected to the heat radiation fin 32. Even with this configuration, the partition plate 450 can partition the air passing through the heat radiating fins 31 and the air passing through the heat radiating fins 32, so that the same effect as that of the first embodiment can be obtained.

(Fifth modification)
Next, a fifth modification of the first embodiment will be described with reference to FIG. In the fifth modification of the first embodiment, an example in which the heat radiation fins 33 are provided in addition to the configuration of the first modification of the first embodiment will be described. In the figure, the same reference numerals are given to the same configurations as those of the first modification of the first embodiment.

In the fifth modification of the first embodiment, as shown in FIG. 8, the cooling unit 530 includes a heat radiation fin 31, a heat radiation fin 32, and a heat radiation fin 33. The heat radiation fin 33 includes the same number of fin portions 33a as the fin portions 31a and 32a, and has the same structure as the heat radiation fins 31 and 32. Further, between the heat radiating fins 32 and the heat radiating fins 33, a partition plate 550 configured in the same manner as the partition plate 50 for the heat radiating fins 31 and 32 is arranged. That is, the partition plate 550 is composed of a partition portion 551, a side plate portion 552, and a side plate portion 553. The space S5 formed between the heat radiation fins 32 and the heat radiation fins 33 by the partition plate 550 is a space S51 that is in contact with the surface 32d on the X2 side of the heat radiation fins 32 and is connected to the heat radiation fins 32, and X1 of the heat radiation fins 33. It is partitioned into a space S52 that is in contact with the side surface 33c and is connected to the heat radiation fin 33. The effect of the partition plate 550 provided between the heat radiation fins 32 and the heat radiation fins 33 is the same as the effect of the partition plate 50 provided between the heat radiation fins 31 and the heat radiation fins 32 in the first embodiment. Is.

[Second Embodiment]
Next, the second embodiment will be described with reference to FIGS. 9 to 11. In this second embodiment, an example will be described in which the heat radiation fins 631 and 632 having the same configuration as the heat radiation fins 31 and 32 of the first embodiment are provided so as to extend laterally to the semiconductor device 620. In the figure, the same reference numerals are given to the same configurations as those in the first embodiment.

As shown in FIGS. 9 and 10, the power conversion device 600 according to the second embodiment of the present invention includes a semiconductor device 620 and a cooling unit 630. Further, the cooling unit 630 is arranged on the side (Y2 side) of the semiconductor device 620 fixed on the lower surface 11b of the vehicle body 11. The cooling unit 630 includes heat radiation fins 631 on the X1 side and heat radiation fins 632 on the X2 side, which are arranged at predetermined intervals along the X-axis direction in which the vehicle body 11 extends. The heat radiating fins 631 and 632 include a plurality of fin portions 631a and 632a extending laterally (the side of the arrow Y2) from the side surface of the semiconductor device 620 and extending in a thin plate shape along the X-axis direction, respectively. .. Further, the plurality of fin portions 631a and 632a are arranged so as to be aligned in the Z-axis direction orthogonal to the traveling direction (X-axis direction), respectively. In the following description, the Z-axis direction in which the plurality of fin portions 631a and 632a are lined up may be referred to as the "alignment direction". The semiconductor device 620 is an example of the "power conversion device main body" in the claims. Further, the heat radiation fins 631 and 632 are examples of the "first heat radiation fin" and the "second heat radiation fin" in the claims, respectively.

As shown in FIG. 9, when the railroad vehicle 610 travels in the direction of the arrow X1, the air near the track 1 is relatively flowed in the direction of the arrow X2 and is blown to the cooling portion 630 of the underfloor space 11a. In this case, the traveling wind passes through the gap between the heat radiating fins 631 (plurality of fin portions 631a) and the heat radiating fins 632 (plurality of fin portions 632a) (see FIG. 10) extending in the X-axis direction in the direction of arrow X2. As a result, the heat of the cooling unit 630 is configured to be exhausted to the atmosphere. In the following description, the case where the rolling stock 610 is traveling in the direction of arrow X1 and the case where the rolling stock 610 is traveling in the direction of arrow X2 are "first directions" within the scope of the claims. And "second direction".

Here, in the second embodiment, as shown in FIGS. 10 and 11, the power conversion device 600 passes through the air passing through the heat radiation fins 631 and the heat radiation fins 632 with respect to the heat radiation fins 631 and the heat radiation fins 632. A partition plate 650 arranged so as to partition the air to be used, and a baffle plate 660 and a baffle plate 670 arranged so as to face the partition plate 650 are installed. The partition plate 650 is an example of a "partition member" within the scope of the claims. Further, the baffle plates 660 and 670 are examples of the "first baffle member" and the "second baffle member" in the claims, respectively.

As shown in FIG. 10, the partition plate 650 is arranged so as to extend from the side surface (Y2 side) of the semiconductor device 620 toward the side of the semiconductor device 620, similarly to the heat radiation fins 631 and 632. As shown in FIG. 11, the partition plate 650 is composed of a partition portion 651, a side plate portion 652, and a side plate portion 653. Further, in the partition plate 650, the partition portion 651, the side plate portion 652, and the side plate portion 653 are integrally formed. The partition portion 651 is arranged between the heat radiation fins 631 and the heat radiation fins 632 in the X-axis direction. The side plate portion 652 is arranged on one side (Z2 side) of the heat radiation fins 631 in the alignment direction. The side plate portion 653 is arranged on the other side (Z1 side) of the heat radiation fins 632 in the alignment direction. The side plate portions 652 and 653 are examples of the "first portion" and the "second portion" of the claims, respectively.

As shown in FIG. 11, the partition portion 651 has a Z2 side end portion of the heat radiation fin 631 on the X2 side surface 631c and a Z1 side end portion of the heat radiation fin 632 on the X1 side surface 632c in a side view. They are arranged so as to be connected in a straight line. That is, the space S60 formed between the heat radiation fins 631 and the heat radiation fins 632 by the partition portion 651 is in contact with the surface 631c on the X2 side of the heat radiation fins 631 and is connected to the heat radiation fins 631 and the heat radiation fins 632. It is partitioned into a space S62 that is in contact with the surface 632c on the X2 side and is connected to the heat radiation fin 632. With this configuration, it is possible to separate the air passing through the heat radiating fins 631 along the traveling direction from the air passing through the heat radiating fins 632 along the traveling direction.

The side plate portion 652 is arranged along the side surface of the heat radiation fin 631 on the Z2 side. Further, the side plate portion 652 is arranged so that one end on the X2 side is continuous with the end on the X1 side of the partition portion 651, and the other end on the X1 side is in the X1 direction with respect to the surface 631d on the X1 side of the heat radiation fin 631. It is arranged so as to protrude. That is, the side plate portion 652 is arranged so as to cover the lower surface of the heat radiation fin 631 on the Z2 side. With this configuration, when the railway vehicle 610 is traveling, it is possible to separate the air passing through the heat radiating fins 631 along the traveling direction from the air passing through the Z2 side of the heat radiating fins 631.

The side plate portion 653 is arranged along the side surface of the heat radiation fin 632 on the Z1 side. Further, the side plate portion 653 is arranged so that one end on the X1 side is continuous with the end on the X2 side of the partition portion 651, and the other end on the X2 side is in the X2 direction with respect to the surface 632d on the X2 side of the heat radiation fin 32. It is arranged so as to have a protrusion. That is, the side plate portion 653 is arranged so as to cover the upper surface of the heat radiation fin 632 on the Z1 side. With this configuration, when the railway vehicle 610 is traveling, it is possible to partition the air passing through the heat radiating fin 632 along the traveling direction and the air passing through the Z1 side of the heat radiating fin 632.

As described above, in the partition plate 650 of the second embodiment, the partition portion 651 is configured to partition the air passing through the heat radiating fins 631 and the air passing through the heat radiating fins 632 when the railway vehicle 610 is traveling. ing. As a result, when the railway vehicle 610 travels in the first direction, the exhaust air discharged from the heat radiation fins 631 is formed by a partition portion 651 between the heat radiation fins 631 and the heat radiation fins 632, as shown in FIG. After passing through the space S61, it is discharged to the outside while passing through the Z1 side of the heat radiation fin 632. That is, the exhaust air warmed by the radiating fins 631 is not directly taken into the radiating fins 632. Further, when the railway vehicle 610 travels in the second direction, the exhaust air discharged from the heat radiating fins 632 passes through the space S62 formed by the partition portion 651 between the heat radiating fins 632 and the heat radiating fins 631, and then passes through the space S62. It is discharged to the outside while passing through the Z2 side of the heat radiation fin 631. That is, the exhaust air warmed by the heat radiation fin 632 is not directly taken into the heat radiation fin 631. Therefore, by configuring the partition plate 650 as in the second embodiment, it is possible to exchange heat with fresh outside air in any of the heat radiation fins 631 and 632.

As shown in FIGS. 10 and 11, the baffle plates 660 and 670 are provided separately from the partition plate 650 and are arranged so as to face the partition plate 650.

The baffle plate 660 is composed of a parallel portion 661 and an inclined portion 662. An air guide path A61 extending in the X-axis direction is formed between the side plate portion 652 on the Z2 side of the heat radiation fin 631 and the parallel portion 661 through which air passes when the railway vehicle 610 is traveling. Further, the inclined portion 662 is arranged so as to be inclined from the Z2 side toward the Z1 direction from the X1 side toward the X2 direction. Then, the air guide path A61 is connected to the space S62 while changing the direction of the space S62 at the end of the air guide path A61 on the X2 side.

The baffle plate 670 is composed of a parallel portion 671 and an inclined portion 672. Then, between the side plate portion 653 on the Z1 side of the heat radiating fin 632 and the parallel portion 671, an air guide path A62 extending in the X-axis direction through which air passes during traveling of the railway vehicle 610 is formed. Further, the inclined portion 672 is arranged so as to go from the Z1 side to the Z2 side as it goes from the X2 side to the X1 side. Then, the air guide path A62 is connected to the space S62 while changing the direction of the space S61 at the end of the air guide path A62 on the X1 side.

As described above, the baffle plate 660 of the second embodiment is provided separately from the partition plate 650 and is arranged so as to face the partition plate 650. As a result, when the railway vehicle 610 travels in the first direction, the traveling wind (fresh outside air) that has passed through the Z2 side of the heat radiation fin 631 is guided to the heat radiation fin 632 by the baffle plate 660. Therefore, it is possible to efficiently send the traveling wind (fresh outside air) to the heat radiating fin 632 on the downstream side when the railway vehicle 610 travels in the first direction, as compared with the case where only the partition plate 650 is provided. ..

The other configurations of the power conversion device 600 are the same as those in the first embodiment.

(Effect of the second embodiment)
In the second embodiment, as described above, in the power conversion device 600, between the heat radiation fins 631 and the heat radiation fins 632, the alignment direction (Z-axis direction) in which the fin portions 631a are aligned perpendicular to the traveling direction of the heat radiation fins 631. Is arranged so as to connect the end on one side (Z2 side) and the end on the other side (Z1 side) of the heat radiation fins 632 in the alignment direction, and travels on the heat radiation fins 631 when the railroad vehicle 610 is running. A partition plate 650 configured to separate the air passing along the direction (X-axis direction) from the air passing along the traveling direction of the heat radiation fin 632 is provided. As a result, as in the first embodiment, the cooling performance (heat dissipation performance) of each of the heat dissipation fins 631 and the heat dissipation fins 632 can be fully exhibited while efficiently utilizing the fresh outside air.

Further, in the second embodiment, the heat radiating fins 631 and the heat radiating fins 632 are installed in the underfloor space 11a of the railway vehicle 610, and a plurality of fin portions 631a and 632a provided in each of the heat radiating fins 631 and the heat radiating fins 632a. Extends toward the side (Y2 direction) of the railroad vehicle 610. As a result, when there is sufficient space for installing the heat radiation fins 631 and the heat radiation fins 632 on the side of the semiconductor device 620, the cooling performance of each of the heat radiation fins 631 and the heat radiation fins 632 for cooling the semiconductor device 620 ( The heat radiating fins 631 and the heat radiating fins 632 that can sufficiently exhibit the heat radiating performance) can be easily installed. Further, by providing the heat radiation fins 631 and the heat radiation fins 632 on the side of the semiconductor device 620, the heat radiation fins 631 and the heat radiation fins 632 are exposed to the side of the railroad vehicle 610 when the railway vehicle 610 is traveling. As a result, it is possible to take in the running wind with less turbulence as compared with the case where the fresh outside air is taken in from under the railroad vehicle 610 to which other devices are attached. It can be easily taken in by 631 and the heat radiation fin 632. As a result, the cooling performance (heat dissipation performance) of the cooling unit 630 can be further improved.

The other effects of the second embodiment are the same as those of the first embodiment.

(First modification)
Next, a first modification of the second embodiment will be described with reference to FIG. In the first modification of the second embodiment, unlike the configuration of the second embodiment, the partition plate 650, the upper baffle plate 770, and the lower surface 11b of the railroad vehicle 610 extend in the X-axis direction. An example in which the air passage A72 is formed will be described. In the figure, the same reference numerals are given to the same configurations as those in the second embodiment.

In the power conversion device 700 of the first modification of the second embodiment, the baffle plate 770 is configured to partially substitute the lower surface of the railroad vehicle 610 instead of the baffle plate 670 of the second embodiment. It has. The baffle plate 770 is an example of the "second baffle member" and the "upper baffle member" in the claims.

The baffle plate 770 is composed of inclined portions 772 arranged so as to go from the Z2 side to the Z1 side in the direction from the X1 side to the X2 side. Further, the end portion of the inclined portion 772 on the X2 side is connected to the lower surface 11b of the railway vehicle 610. Then, the partition plate 650, the inclined portion 772, and the lower surface 11b of the railway vehicle 610 form an air guide path A72 extending in the X-axis direction through which air passes when the railway vehicle 610 is traveling. As a result, a part of the upper baffle plate 670 can be replaced by the downward facing surface (lower surface 11b) of the railroad vehicle 610. In comparison, the required upper baffle plate 670 can be made smaller. Further, by using the surface of the railroad vehicle 610, which has a relatively higher mechanical strength than the plate-shaped wind guide member, as the wall of the air passage, the frequency of parts replacement due to the aged deterioration of the wind guide member due to the running wind Can be reduced. The air guide path A72 is an example of a "running wind air path" within the scope of the claims. The effect of the partition plate 650 is the same as that of the second embodiment.

(Second modification)
Next, a second modification in the second embodiment will be described with reference to FIGS. 13 and 14. In the second modification of the second embodiment, in addition to the configuration of the second embodiment, an example in which the maintenance cover 21 detachable from the semiconductor device 820 is arranged at the installation location of the partition plate 850 will be described. In the figure, the same reference numerals are given to the same configurations as those in the second embodiment. The partition plate 850 is an example of a "partition member" within the scope of the claims. Further, the semiconductor device 820 is an example of the "power conversion device main body" within the scope of the claims. The maintenance cover 21 is an example of a "cover member" within the scope of the claims.

In the power conversion device 800 of the second modification of the second embodiment, as shown in FIG. 13, the air passing through the heat radiation fins 631 and the air passing through the heat radiation fins 632 are sent to the heat radiation fins 631 and the heat radiation fins 632. A partition plate 850 arranged so as to partition, a baffle plate 860 and a baffle plate 870 arranged so as to face the partition plate 850, and a maintenance cover 21 are installed. The baffle plate 860 and the baffle plate 870 are examples of the "first baffle member" and the "second baffle member" in the claims, respectively.

The partition plate 850 includes a partition portion 851 formed integrally with the maintenance cover 21 on the outer surface of the maintenance cover 21. The baffle plate 860 and the baffle plate 870 are inclined portion 662 and the baffle plate 670 of the baffle plate 660 of the second embodiment so as not to overlap with the maintenance cover 21 in the side view, respectively. It has an inclined portion 862 and an inclined portion 872, which are formed shorter than the portion 672, respectively.

The maintenance cover 21 is detachably provided so as to cover the opening 22 formed on the side surface of the semiconductor device 820. Then, as shown in FIG. 14, when the maintenance cover 21 is removed from the side surface of the semiconductor device 820, the opening 22 is exposed. At this time, the partition plate 850 integrally formed with the maintenance cover 21 is also removed from the side surface of the semiconductor device 820. By accessing the inside of the semiconductor device 820 from the opening 22, the user can perform maintenance work on the semiconductor device 820. The opening 22 is an example of an "opening" in the claims.

As described above, in the power conversion device 800 of the second modification of the second embodiment, the power conversion device 800 is detachably provided so as to cover the opening 22 formed on the side surface of the semiconductor device 820 for inspecting the inside of the semiconductor device 820. The maintenance cover 21 is further provided, and the maintenance cover 21 is provided at the installation location of the partition plate 850. Thereby, by removing the partition plate 850 and the maintenance cover 21 from the semiconductor device 820, the inside of the semiconductor device 820 can be accessed from the installation location of the partition plate 850. As a result, even in the power conversion device 800 provided with the partition plate 850 in order to improve the cooling performance, the maintenance work of the semiconductor device 820 can be easily performed by accessing the inside of the semiconductor device 820 from the vicinity of the cooling unit. Can be done.

Further, in the power conversion device 800 of the second modification of the second embodiment, the partition plate 850 is integrally formed with the maintenance cover 21. As a result, the partition plate 850 and the maintenance cover 21 can be easily removed from the semiconductor device 820, so that the maintenance work of the semiconductor device 820 can be easily performed. The effect of the partition plate 850 is the same as that of the second embodiment.

[Other variants]
The embodiments and variations disclosed this time should be considered to be exemplary and not restrictive in all respects. The scope of the present invention is shown by the scope of claims rather than the description of the above-described embodiments and modifications, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims.

In the first modification of the first embodiment, an example in which the baffle plates 60 and 70 are not provided is shown, but the present invention is not limited to this. In the present invention, the baffle plates 660 (680) and 670 (770, 870) may not be provided in the second embodiment and the modifications of the second embodiment.

Further, although the shapes and arrangements of the baffle plates 60 and 70 of the second modification and the third modification of the first embodiment are different from those of the first embodiment, the present invention is limited to this. No. In the present invention, it may be applied to the second embodiment and the modifications of the second embodiment.

Further, in the fourth modification of the first embodiment, an example is shown in which the line passing through the center of the heat radiation fins 31 in the alignment direction and the line passing through the center of the heat radiation fins 32 in the alignment direction are arranged so as not to coincide with each other. However, the present invention is not limited to this. In the present invention, the configuration in which the line passing through the center of the first heat radiation fins in the alignment direction and the line passing through the center of the second heat radiation fins in the alignment direction do not coincide with each other is the first embodiment and the first. It may be applied to the first to third and fifth modifications of the embodiment, the second embodiment, and the first and second modifications of the second embodiment.

Further, in the fifth modification of the first embodiment, an example including three heat radiation fins of a heat radiation fin 31, a heat radiation fin 32, and a heat radiation fin 33 is shown, but the present invention is not limited to this. .. In the present invention, the configuration in which the cooling unit is provided with the three heat radiation fins is the first embodiment, the first to fourth modifications of the first embodiment, the second embodiment, and the second embodiment. May be applied to the first and second variants of. Further, the number of heat radiation fins provided in the cooling unit is not limited to two or three, and may be four or more.

In the first embodiment, the modified example of the first embodiment, the second embodiment and the modified example of the second embodiment, the partition portions 51, 451 (651, 851) are the heat radiating fins 31 (631). A plan view of the end of the Y1 side (Z2 side) of the surface 31c (631c) on the X2 side and the end of the Y2 side (Z1 side) of the surface 32c (632c) of the heat radiation fin 32 (632) on the X1 side. (Side view) shows an example in which one is arranged so as to be connected in a straight line, but the present invention is not limited to this. In the present invention, for example, the partition portion may be configured as a partition plate so as to be connected in a zigzag shape or an arc shape composed of a plurality of line segments in a plan view (side view).

Further, in the first embodiment, the modified example of the first embodiment, the second embodiment and the modified example of the second embodiment, the partition portions 51, 451 (651, 851) are the heat radiation fins 31 (631). ) On the X2 side surface 31c (631c) on the Y1 side (Z2 side) and the end of the heat radiation fin 32 (632) on the X1 side surface 32c (632c) on the Y2 side (Z1 side). Although an example in which they are arranged so as to be connected is shown, the present invention is not limited to the case where the partition plate connects the end portion of the first heat radiation fin and the end portion of the second heat radiation fin. In the present invention, for example, the partition plate is provided in the vicinity of the end portion of the heat radiation fin 31 (631) on the X2 side 31c (631c) on the Y2 side (Z1 side) and the surface of the heat radiation fin 32 (632) on the X1 side. It may be configured to connect with the vicinity of the end portion on the Y1 side (Z2 side) of the 32c (632c).

In the second modification of the second embodiment, the partition plate 850 is integrally formed with the maintenance cover 21, and when the maintenance cover 21 is removed, the entire partition plate 850 is viewed from the side surface of the semiconductor device 820. Although the example of being removed is shown, the present invention is not limited to this. In the present invention, of the partition plate 850, only the portion that overlaps with the partition plate 850 may be removable. In this case, for example, by forming the partition portion 851 separately from the side plate portions 652 and 653, when the maintenance cover 21 is removed, only the partition portion 851 may be removed together with the maintenance cover 21. ..

In the second modification of the second embodiment, the partition plate 850 is integrally formed with the maintenance cover 21, but the present invention is not limited to this. In the present invention, not only the partition plate 850 but also the baffle plates 860 and 870 may be configured to be integrally formed with the maintenance cover 21. In this case, since it is not necessary to arrange the baffle plates 860 and 870 so as not to overlap with the maintenance cover 21 in the side view, increase the size of the baffle plates 860 and 870 or the maintenance cover 21. Is possible.

Further, in the second embodiment and the modified examples of the second embodiment, the heat radiation fins 631 and 632 are configured to be provided on one side (Y2 side) of the semiconductor devices 620 and 820. Not limited to. In the present invention, the heat radiation fins 631 and 632 may be provided on the other side (Y1 side) of the semiconductor devices 620 and 820. Further, it may be provided on both side surfaces of the semiconductor devices 620 and 820.

Further, in the first embodiment, the modified example of the first embodiment, the second embodiment and the modified example of the second embodiment, the heat radiation fins 31 (631), 32 (632) and 33 are used as semiconductor devices. Although it is configured to be provided on either the side surface or the lower surface of 20 (620, 820), the present invention is not limited to this. In the present invention, a plurality of heat radiation fins may be provided on both the side surface and the lower surface of the semiconductor device.

10,610 Railroad vehicles 20,620,820 Semiconductor devices (power conversion device body)
21 Maintenance cover (cover member)
22 Aperture (opening)
31,631 Heat dissipation fins (first heat dissipation fins)
31a, 32a, 33a, 631a, 632a Fin portions (plural fin portions)
32, 632 heat radiation fins (second heat radiation fins)
50, 450, 550, 650, 850 Partition plate (partition member)
52, 552, 652 side plate part (first part)
53, 553, 653 Side plate part (second part)
60, 260, 360, 660, 860 Wind guide plate (first wind guide member)
70,270,370,670,770,870 Baffle plate (second baffle member)
90 Center line 92 (Connects the ends of the heat radiation fin 31 and the heat radiation fin 32 on one side (Y1 side) in the sleeper direction) Line segment 93 (The heat radiation fin 31 and the heat radiation fin 32 on the other side (Y2 side) in the sleeper direction) ) Line segment 100, 600, 700, 800 Power converter (power converter for railroad vehicles)
770 baffle plate (upper baffle member)
A72 Wind guide (running wind)

Claims (11)

A first heat dissipation fin, which is provided so that a plurality of fin portions extend along the traveling direction of the railway vehicle and dissipates heat of the power conversion device main body mounted on the railway vehicle,
A second heat radiating fin is arranged at a predetermined distance in the traveling direction and is provided so that a plurality of fin portions extend along the traveling direction to dissipate heat from the power conversion device main body. With heat dissipation fins
Between the first heat radiating fin and the second heat radiating fin, one end or a vicinity thereof in the alignment direction in which the fin portions are aligned orthogonal to the traveling direction of the first heat radiating fin, and the second heat radiating fin. The fins are arranged so as to connect to the other end in the alignment direction or the vicinity thereof, and when the railroad vehicle travels, the air passing through the first heat radiation fin along the travel direction and the second heat radiation. A partition member configured to partition the air passing through the fin along the traveling direction is provided .
The partition member is arranged so as to cover one side of the first heat radiating fins in the alignment direction, and when the railway vehicle travels, the air passing through the first heat radiating fins along the traveling direction and the first one. A first portion provided separately from the first heat radiation fin, which is configured to partition the air passing through one side of the heat radiation fin in the alignment direction, and the other side of the second heat radiation fin in the alignment direction. Arranged so as to cover the railroad vehicle, the air passing through the second heat radiating fin along the traveling direction and the air passing through the other side of the second heat radiating fin in the alignment direction are separated from each other when the railroad vehicle is traveling. A power conversion device for a railroad vehicle , including a second portion configured separately from the second heat radiation fin. The partition member linearly extends from one end of the first heat radiation fin in the alignment direction or its vicinity to the other end of the second heat radiation fin in the alignment direction or its vicinity. The electric power conversion device for a railroad vehicle according to claim 1. Separately from the partition member, it is provided on one side in the alignment direction, and when traveling in the first direction of the traveling direction, air that has passed in the vicinity of the first heat radiation fin is guided to the second heat radiation fin. The first air guide member and
A second unit that is provided on the other side in the alignment direction separately from the partition member and guides air that has passed in the vicinity of the second heat radiation fin to the first heat radiation fin when traveling in the second direction of the travel direction. 2. The electric power conversion device for a railroad vehicle according to claim 1 or 2 , further comprising a wind guide member. The power conversion device for a railway vehicle according to claim 3 , wherein at least a part of the first wind guide member and the second wind guide member are arranged so as to face the partition member. The first air guide member is arranged on one side of the first heat radiating fin in the alignment direction at a predetermined distance from the first heat radiating fin.
The second air guide member is arranged on the other side of the second heat radiating fin in the alignment direction at a predetermined distance from the second heat radiating fin.
The second heat radiation fin side of the first air guide member extends at least to a line segment connecting the ends of the first heat radiation fin and the second heat radiation fin on one side in the alignment direction.
A claim that the first heat radiation fin side of the second air guide member extends at least on a line segment connecting the other end portions of the first heat radiation fin and the second heat radiation fin in the alignment direction. Item 3. The electric power conversion device for a railroad vehicle according to item 3 or 4. The first heat radiation fin and the second heat radiation fin are installed in the underfloor space of the railway vehicle, and the plurality of fin portions provided in each of the first heat radiation fin and the second heat radiation fin are described. The power conversion device for a railroad vehicle according to any one of claims 3 to 5 , which extends downward of the railroad vehicle. The first heat radiation fin and the second heat radiation fin are installed in the underfloor space of the railway vehicle, and the plurality of fin portions provided in each of the first heat radiation fin and the second heat radiation fin are described. The power conversion device for a railroad vehicle according to any one of claims 3 to 5 , which extends toward the side of the railroad vehicle. The first wind guide member or the upper wind guide member of the second wind guide member is attached to a surface facing downward of the railroad vehicle, and the first heat radiation fin or the second heat radiation fin and the second heat radiation fin. The claim that the downward-facing surface of the railroad vehicle and the upper wind guide member form an air passage for traveling wind passing near the upper side of the first heat radiation fin and the second heat radiation fin. 7. The electric power conversion device for railway vehicles according to 7. Further, a cover member provided detachably so as to cover an opening formed on the side surface of the power conversion device main body for inspecting the inside of the power conversion device main body is further provided.
The power conversion device for a railway vehicle according to claim 7 or 8 , wherein the cover member is provided at a location where the partition member is installed. The power conversion device for a railway vehicle according to claim 9 , wherein the partition member is integrally formed with the cover member. The line passing through the center of the first heat radiating fin in the alignment direction and along the traveling direction and the line passing through the center of the second heat radiating fin in the alignment direction and along the traveling direction are substantially the same. , The electric power conversion device for a railway vehicle according to any one of claims 1 to 10.

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