JPWO2017068873A1 - Transformer for vehicle - Google Patents

Abstract

An object of the present invention is to obtain a vehicular transformer that is effectively cooled by a traveling wind by reducing the position at which the traveling wind is taken in a stagnation area at the rear of the vehicle in the traveling direction of the peripheral device. A vehicular transformer 10 a according to the present invention has a winding 9 and is connected to a transformer body 12 connected to a pipe 11 through which a refrigerant circulates, an oil pump 13 that circulates the refrigerant through the pipe 11, and the pipe 11. A cooler 14a that cools the refrigerant, a first air intake port that takes in the traveling wind generated by the traveling of the vehicle, a first air supply port that feeds the traveling wind toward the cooler as cooling air, The intake air and the first air supply port are connected and the traveling wind is guided so that the air blowing direction is opposite to the traveling direction of the vehicle, and the guided traveling wind is discharged from the first air supply port as cooling air. And a first duct provided behind the transformer main body 12 and the cooler 14a in the traveling direction of the vehicle.

Description

  The present invention relates to a vehicular transformer, and more particularly to a vehicular transformer that cools refrigerant oil by using traveling wind generated by traveling of the vehicle.

  Devices such as air conditioners, power converters, controllers, and transformers mounted on vehicles generate a lot of heat during operation. As a cooling method for these devices, there are a forced air cooling method using an electric blower and a traveling wind self-cooling method using traveling wind generated by traveling of the vehicle.

  The running wind self-cooling method has been spreading in recent years from the viewpoint of energy saving and low noise compared to the forced air cooling method. Generally, the traveling wind self-cooling method has been adopted as a cooling method for equipment such as a vehicle transformer installed under the floor (see, for example, Patent Document 1). This is because, when the traveling wind self-cooling system is applied to, for example, a vehicle transformer installed under the floor, the vehicle transformer can be efficiently cooled for the reasons described below. In other words, in addition to the inflow of traveling wind from the side surface of the vehicle, the traveling wind reflected by the track surface is directed to the vehicle transformer installed on the floor lower surface between the vehicle floor underside and the track surface. It becomes. As a result, even if a large number of peripheral devices are arranged around the vehicular transformer, traveling wind having a high flow velocity flows into the periphery of the vehicular transformer cooler, and effective cooling can be achieved.

  On the other hand, for example, in low-floor vehicles that are popular in Europe, the installation space under the floor is small, so large-sized peripheral devices such as air conditioners, power converters, and controllers are installed on the roof of the vehicle along with the vehicle transformer. It is installed in. In order to cool the transformer for vehicles installed on the roof of such a vehicle, the forced air cooling system using the electric blower was used until now.

JP 2004-363253 A

  However, when the traveling wind self-cooling system is adopted for cooling the vehicle transformer, the peripheral device is installed in front of the vehicle in the traveling direction of the vehicle transformer. As a result, the stagnation region in which the wind with a low flow velocity flows behind the peripheral device in the traveling direction of the vehicle is generated. For this reason, depending on the arrangement of the peripheral device and the vehicle transformer, when the position where the vehicle transformer takes in the traveling wind is provided in the stagnation region, the traveling wind having a sufficient flow velocity is transmitted around the cooler of the vehicle transformer. There is a problem that sufficient cooling performance cannot be obtained with the traveling wind.

  The present invention has been made in order to solve the above-described problems. The purpose of the present invention is to determine that the position where the traveling wind is taken in the vehicular transformer is in the stagnation area at the rear in the traveling direction of the vehicle of the peripheral device. It is to obtain a transformer for a vehicle that is reduced and effectively cooled by traveling wind.

  The vehicle transformer according to the present invention has a winding body and a transformer body connected to a pipe through which refrigerant oil circulates, an oil pump that circulates refrigerant oil through the pipe, and a pipe connected to cool the refrigerant oil. A first air intake port that takes in the traveling wind generated by the traveling of the vehicle, a first air supply port that sends the traveling wind toward the cooler as cooling air, a first intake port, and a first air inlet The first connection is configured to guide the traveling wind so that the air blowing direction is opposite to the traveling direction of the vehicle and to discharge the guided traveling wind as cooling air from the first air feeding opening. And a first duct provided behind the transformer main body and the cooler in the traveling direction of the vehicle.

  In the vehicular transformer according to the present invention, it is possible to reduce the position where the driving wind of the vehicular transformer takes in the stagnation area in the rearward direction of the vehicle of the peripheral device, and to effectively cool by the driving wind. it can.

It is a top view which shows the rail vehicle which installed the transformer for vehicles concerning Embodiment 1 of this invention. It is a side view which shows the rail vehicle which installed the transformer for vehicles concerning Embodiment 1 of this invention. It is a top view which shows the structure of the transformer for vehicles which concerns on Embodiment 1 of this invention. It is a side view which shows the structure of the transformer for vehicles which concerns on Embodiment 1 of this invention. It is a cross-sectional schematic diagram of the AA cross section of FIG. 4 for showing the installation state on the roof of the vehicle transformer which concerns on Embodiment 1 of this invention. It is a perspective view which shows the external appearance of the cooler of the transformer for vehicles which concerns on Embodiment 1 of this invention. It is a perspective view for demonstrating the detailed shape of the duct of the transformer for vehicles which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the flow of the driving | running | working wind behind a peripheral device. It is a side view which shows a mode that the vehicle transformer which concerns on Embodiment 1 of this invention has been arrange | positioned on the roof of a vehicle. It is a top view of the vehicle for showing the flow field at the time of vehicle travel. It is a top view which shows the structure of the transformer for vehicles which concerns on Embodiment 2 of this invention. It is a side view which shows a mode that the vehicle transformer which concerns on Embodiment 2 of this invention has been arrange | positioned on the roof of a vehicle. It is a top view which shows the structure of the modification of the transformer for vehicles which concerns on Embodiment 2 of this invention. It is a perspective view which shows the duct in the case of the modification of the transformer for vehicles concerning Embodiment 2 of this invention. It is a side view which shows a mode that the modification of the transformer for vehicles which concerns on Embodiment 2 of this invention has been arrange | positioned on the roof of a vehicle.

  In the embodiment of the present invention, a railway vehicle will be described as an example of a vehicle. However, it goes without saying that the present invention can be applied to vehicles such as a streetcar and a bus in addition to the railcar.

Embodiment 1 FIG.
FIG. 1 is a top view showing an example of a railway vehicle in which a vehicular transformer 10a according to Embodiment 1 of the present invention is installed on a roof. FIG. 2 is a side view of the railway vehicle shown in FIG.

  In the following description, the vehicle length direction, which is the direction in which the vehicle moves, is defined as the X direction, the vehicle width direction is defined as the Y direction, and the vehicle height direction is defined as the Z direction. The description will be made assuming that the vehicle traveling direction is the -X direction, the direction from left to right when facing the vehicle traveling direction is the + Y direction, and the direction from the floor to the roof is the + Z direction.

  As shown in FIGS. 1 and 2, a vehicle transformer 10 a and a plurality of peripheral devices 3 are provided on the roof 2 of the vehicle 1. Two peripheral devices 3 are installed in front of the vehicle transformer in the traveling direction, and one peripheral device 3 is installed in the traveling direction rear of the vehicle transformer 10a. Here, the front in the traveling direction means the position in the −X direction, and the rear in the traveling direction means the position in the + X direction. The peripheral device 3 is, for example, a power converter, a controller, an air conditioner or the like. The roof top 2 is defined and described as showing the entire upper surface or a part of the upper surface of the vehicle 1. Needless to say, the configuration, number, and arrangement of the peripheral devices installed on the roof 2 are not limited to those described above.

  FIG. 3 is a top view showing the configuration of the vehicle transformer 10a according to the first embodiment. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. As shown in FIG. 3, the vehicle transformer 10 a includes a transformer body 12 having a housing. Inside the transformer body 12, a winding 9 is provided as a main heat source. A pipe 11 is connected to the transformer main body 12 to form a refrigerant oil circulation path. An oil pump 13 for forcibly circulating the refrigerant oil is installed at a position in the −X direction with respect to the transformer main body 12 in the middle of the pipe 11. Further, a conservator 15 that absorbs the thermal expansion amount of the refrigerant oil is installed at a position in the + X direction with respect to the transformer body 12. On both side surfaces of the transformer body 12 in the Y direction, coolers 14a for cooling the refrigerant oil by heat exchange with the traveling wind are installed. A duct 16a is provided at a position in the −X direction of the transformer main body 12 and the cooler 14a. A duct 16b is provided at a position in the + X direction of the transformer main body 12 and the cooler 14a. The duct 16a suppresses the traveling wind from flowing into the transformer body 12 from the position of the duct 16a in the -X direction. The duct 16b takes in the traveling wind generated by the traveling of the vehicle, and blows the traveling wind captured by changing the blowing direction inside the cooler 14a.

  Insulating oil is used as the refrigerant oil, and particularly for vehicles, highly flame-retardant silicone oil or ester oil with a low environmental impact at the time of disposal is used. The casing of the transformer body 12 is made of a metal such as steel or aluminum. In addition, the surface of the casing is coated with metal to prevent corrosion. An insulating member such as an insulating bush is installed at a portion of the transformer body 12 connected to the electric wire. The conservator 15 is for absorbing thermal expansion when the temperature of the refrigerant oil changes, and the capacity of the conservator 15 is set so as to sufficiently absorb this thermal expansion.

  FIG. 4 is a side view showing the configuration of the vehicle transformer 10a according to Embodiment 1 of the present invention. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. As shown in FIG. 4, the duct 16 a as the second duct is provided at a position in the −X direction with respect to the transformer main body 12. The duct 16b as the first duct is installed at a position in the + X direction with respect to the transformer main body 12. Furthermore, the duct 16a and the duct 16b are disposed so as to face each other with the transformer body 12 sandwiched in the X direction.

  FIG. 5 is a schematic cross-sectional view taken along the line AA of FIG. 4 for illustrating an installation state on the roof 2 of the vehicle transformer 10a according to the first embodiment of the present invention. FIG. 4 is a diagram showing the vehicular transformer 10a. In order to make the cross-sectional position easy to understand, the cross-sectional position is shown using FIG. That is, FIG. 5 shall show sectional drawing in the AA cross section containing the vehicle 1 in addition to the vehicle transformer 10a. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. The duct 16b is provided with an intake port 30 for taking in the traveling wind. A dotted line indicates the vehicle limit 17. The vehicle limit 17 is a limit range of the size of the cross section of the vehicle body of the railway vehicle, and is a limit value in the Y direction and the Z direction of the vehicle determined so that the railway vehicle can safely travel on the track. The upper space on the roof 2 of the vehicle limit 17 is formed so that the width in the Y direction on the upper side thereof becomes narrower toward the + Z direction because of the relationship with the track structure such as a tunnel. The height of the transformer body 12 in the + Z direction is lower than that of the duct 16b. For this reason, the air inlet 30 is opened from the transformer main body 12 in the + Z direction.

  FIG. 6 is a perspective view showing an appearance of cooler 14a of transformer for vehicle 10a according to the first embodiment of the present invention. The cooler 14a includes a plurality of inverted U-shaped cooling pipes 19a and 19b having different sizes. Here, a plurality of cooling pipes 19a and cooling pipes 19b having different sizes are arranged on the same plane. The cooling pipe 19a is provided in the outermost part of the cooler 14a. The cooler 14a is configured by arranging a plurality of cooling pipes 19a and cooling pipes 19b arranged on the same plane in the X direction. Each cooling pipe 19a and cooling pipe 19b are connected to the inlet header 18a and the outlet header 18b at both ends, respectively.

  The connection between the pipe 11 and the vehicular transformer 10a will be described with reference to FIGS. A pipe 11 is connected from the outlet of the transformer body 12 to the suction port of the oil pump 13, exits from the discharge port of the oil pump 13, and branches in the + Y direction and the −Y direction. Each of the branched pipes 11 extends in the + X direction and is connected to the inlet header 18a of the cooler 14a, exits from the outlet header 18b of each cooler 14a, extends in the + X direction, and then extends in the −Y direction and the + Y direction. It is connected to the inlet of the transformer body 12 via a branch with the beta 15. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  The cooling pipe 19 a provided on the outermost side of the cooler 14 a is formed with an inclined side in accordance with the shape of the vehicle limit 17. Moreover, the outermost surface 20 of the cooler 14a shown in FIG. 6 is a surface of the outer portion of the plurality of cooling pipes 19a. The outermost surface 20 of the cooler 14 a is provided along the vehicle limit 17. Although the cooling pipes 19a and 19b are illustrated as a plurality of cylindrical pipes in the figure, the cooling pipes 19a and 19b are not limited to this, and may be flat tubes or rectangular tubes, for example.

  By arranging the cooling pipes on both side surfaces in the Y direction of the transformer body, it is possible to configure a vehicular transformer with a good weight balance. Furthermore, since outside air can be efficiently taken into the cooler from the side surface in the Y direction when the vehicle is stopped, natural convection is promoted in the transformer body, and heat exchange performance when the vehicle is stopped is improved.

  FIG. 7 is a perspective view for explaining a detailed shape of duct 16b of vehicular transformer 10a according to the first embodiment of the present invention. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. The duct 16b has an intake port 30 for taking in the traveling wind 33 and an air supply port 31 for discharging the taken traveling wind 33 to the cooler 14a as cooling air 34. A recess 32 is formed in the lower portion of the duct 16b. Since the vehicle 1 is traveling in the −X direction, the traveling wind 33 flows in the + X direction.

  The intake port 30 and the air supply port 31 are provided so that the opening faces in the −X direction. The air inlet 30 and the air inlet 31 are smoothly connected by a connecting portion 35a formed inside the duct 16b. The air flow direction of the traveling wind 33 is changed by the connecting portion 35a. In other words, the traveling wind 33 directed in the + X direction is taken in at the intake port 30 and passes through the connecting portion 35a, so that it travels toward the outside of the vehicle and is guided in the -Z direction, and then in the air blowing direction in the opposite direction. As a result, it is sent out from the air inlet 31 as the cooling air 34 directed in the -X direction.

  A recess 32 is formed at the center lower portion of the duct 16b in the Y direction. The piping 11 can be communicated between the concave portion 32 formed in the duct 16b and the roof top 2 of the vehicle. Therefore, when the pipe 11 is arranged between the transformer main body 12 and the oil pump 13 and between the conservator 15 and the transformer main body 12, there is no need to arrange around the duct 16b. The overall length can be shortened.

  Further, the air supply port 31 is disposed at a position away from the intake port 30 in the + Y direction or the −Y direction, and is disposed at a position away from the −Z direction. That is, the air inlet 30 and the air inlet 31 are arranged at positions separated in the Y direction and the Z direction. As a result, it is possible to prevent the cooling air 34 and the traveling air 33 warmed by the cooler 14 a from being mixed at the intake port 30.

  The two air supply ports 31 provided in the duct 16b are provided to face the cooler 14a. These air supply ports 31 are arranged at a position in the + X direction with respect to the cooler 14a, and each face the cooler 14a. The traveling wind 33 taken in from the intake port 30 is guided by the connecting portion 35a so that the blowing direction of the traveling wind 33 is reversed. As a result, the air is blown from the air supply port 31 toward the cooler 14a facing the air supply port 31. In FIG. 7, the air flow directions of the traveling air 33 and the cooling air 34 are opposite. The traveling wind 33 taken from the position of the duct 16b in the + X direction can be blown as the cooling wind 34 to the cooler 14a provided at the position of the duct 16b in the -X direction.

  In addition, although the structure was demonstrated about the duct 16b, since it is the same structure also about the duct 16a and arrangement | positioning only differs, the description is abbreviate | omitted. Needless to say, the duct 16a and the duct 16b may have different structures. In this case, the shape of the duct can be changed according to the configuration of the peripheral device 3 of the vehicle, and the cooling performance can be further improved.

  FIG. 8 is an explanatory diagram showing the flow of the traveling wind 33 at the position of the peripheral device 3 in the + X direction. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. When the vehicle 1 travels in the −X direction, after the air flows on the upper surface of the peripheral device 3, the separated traveling wind 33 gradually approaches the roof 2 and finally adheres to the roof 2.

  In general, depending on the height of the peripheral device 3, a stagnation region is formed in the position of the peripheral device 3 in the + X direction. In this stagnation area, there is no fast wind flow. Therefore, when the vehicular transformer 10a is arranged in the stagnation region, the traveling wind cannot be sufficiently taken in, and the cooling performance is greatly reduced. In a general turbulent flow, assuming that the height of the peripheral device 3 is h, the run-up distance x required until the reattachment point at which the wind once peeled off by the peripheral device 3 reattaches is about the rearward direction of the peripheral device 3 in the traveling direction. 7h.

  The height h of the peripheral device 3 arranged on the roof 2 of the vehicle varies depending on the structure of the vehicle 1, but is 1 m at maximum due to the restriction of the vehicle limit 17. In this case, a running distance x of about 7 m at the maximum is required behind the peripheral device 3. However, in order to effectively use a limited area, a large number of peripheral devices 3 are often arranged on the roof 2, and the vehicle transformer 10 a is arranged while securing a distance in the + X direction with respect to the peripheral devices 3. It is difficult.

  FIG. 9 is a side view showing from the side how the vehicle transformer 10a according to Embodiment 1 of the present invention is arranged on the roof 2 of the vehicle. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. The traveling wind 33 flowing above the peripheral device 3 positioned in the −X direction of the vehicle transformer 10a passes over the duct 16a disposed at the position of the −X direction of the transformer body 12 and then peels off. Wake up.

  For example, the length of the transformer main body 12 in the X direction is 2.5 m, and the difference in height between the upper surface of the duct 16a and the upper surface of the transformer main body 12 shown in FIG. Suppose that it is about 30m. In this case, the separated traveling wind 33 reattaches to the duct 16b about 2 m behind. Therefore, the transformer main body 12 can take in the traveling air 33 having a sufficient flow velocity from the intake port 30 in the rearward direction of 2 m.

  FIG. 10 is a top view of the vehicle 1 for showing a flow field during vehicle travel. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. The cooling air 36 is warmed by heat exchange with the refrigerant oil by blowing the cooling air 34 onto the cooler. A peripheral device 3 is arranged on the roof 2 of the vehicle 1 so as to sandwich the vehicle transformer 10a in the X direction.

  The traveling wind 33 peeled off by the peripheral device 3 approaches the vehicle 1 as it goes in the + X direction, but the −16 direction of the cooler 14a is caused by the duct 16a provided at the position of the transformer body 12 in the −X direction. The traveling wind 33 does not flow into the area.

  The traveling wind 33 that has passed through the upper surface of the duct 16a gradually approaches the transformer main body 12 toward the + X direction and reattaches to the upper surface of the transformer main body 12. Since the high-speed traveling wind 33 flows on the upper surface of the transformer main body 12, the heat dissipation efficiency from the surface of the transformer main body 12 is improved.

  Further, the traveling wind 33 flowing on the surface of the transformer main body 12 is taken into the duct 16b in which an opening is provided at a position in the + X direction of the transformer main body 12. Inside the duct 16b, the intake port 30 and the air supply port 31 are communicated with each other by a connecting portion 35a. The traveling wind taken in by the air inlet 30 is sent out as cooling air 34 through the air inlets 31 disposed on both side surfaces of the transformer body 12 in the Y direction.

  The cooling air 34 discharged from the duct 16b exchanges heat with refrigerant oil in the cooler 14a. As shown in FIG. 6, the cooler 14a has a shape in which a plurality of cylindrical cooling pipes 19a and 19b are arranged along the X direction, so that the cooling air 34 that has entered the cooler 14a is + X from the cooler 14a. As it goes in the direction, it gradually diffuses from the gap between the cooling pipes 19a and 19b to the outside of the cooler 14a.

  As shown in FIG. 10, the cooling air 36 that has completed heat exchange with the refrigerant oil and diffused to the outside of the cooler 14a merges with the traveling wind 33 that flows in the + X direction around the cooler 14a, and in the + X direction. And flow. The intake port 30 of the duct 16b is not provided at a position in the + X direction of the cooler 14a. Therefore, the cooling air 36 diffused and exhausted from the cooler 14a is not taken into the duct 16b again, and the cooling air 34 having a low temperature is always sent to the cooler 14a.

  The intake port 30 of the duct 16a and the intake port 30 of the duct 16b face each other in the X direction. Similarly, the air supply port 31 of the duct 16a and the air supply port 31 of the duct 16b face each other in the X direction.

  Since the duct 16a and the duct 16b are arranged opposite to each other in the X direction with the transformer body 12 interposed therebetween, even if the traveling direction of the vehicle is changed, the cooling air is supplied to the cooler 14a in the same manner as before the traveling direction is changed. 34 can be supplied.

  In addition, since there is no shielding object in the + Z direction position of the transformer main body 12 and the cooler 14a, it is possible to ensure sufficient heat dissipation by generating natural convection even when the vehicle is stopped. It is.

  In the present invention, the case where the cooler is arranged on both sides of the transformer body in the Y direction has been described as an example. However, the present invention is not limited to this. In the case of a transformer for use, it goes without saying that the cooler may be disposed only on one side surface of the transformer body in the vehicle width direction.

  In the first embodiment, two ducts are provided, but it is needless to say that only one duct 16b may be provided at a position in the + X direction of the transformer main body 12. In this case, if the air inlet 30 of the duct 16b is provided behind the traveling direction of the vehicle 1 with respect to the position where the traveling wind peeled off by the peripheral device 3 ahead of the traveling direction of the vehicle 1 reattaches to the surface of the transformer body 12. Good. That is, the duct 16b may be provided behind the transformer body 12 and the cooler 14a in the traveling direction of the vehicle 1. In this case, the traveling wind 33 can be taken in at the intake port 30 outside the stagnation region, and the transformer body 12 can be effectively cooled.

Embodiment 2. FIG.
FIG. 11 is a top view showing a configuration of a vehicle transformer 10b according to the second embodiment of the present invention. The difference from the configuration of the vehicle transformer 10a according to the first embodiment shown in FIG. 3 is that auxiliary devices such as the oil pump 13 and the conservator 15 are provided between the duct 16a and the transformer body 12, and the duct 16b and the transformer. It is a point arranged between the main body 12. The cooler 14b has a configuration that is longer in the X direction than the cooler 14a according to the first embodiment. This is because the cover 37 a for covering the oil pump 13 and the cover 37 b for covering the conservator 15 are provided between the duct 16 a and the duct 16 b and the transformer main body 12. In the following description, the same or corresponding components as those of the vehicle transformer 10a of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 12 is a side view showing a state where the vehicular transformer 10b according to the second embodiment of the present invention is arranged on the roof 2 of the vehicle 1. FIG. The cover 37 a and the cover 37 b are provided so that the upper surfaces thereof are the same height as the upper surface of the transformer body 12. Moreover, it is desirable that the transformer main body 12, the cover 37a, and the cover 37b are provided close to each other in the X direction. In this case, the traveling wind 33 suppresses the flow into the area between the cover 37a and the cover 37b and the transformer body 12. As a result, a sufficient amount of traveling wind 33 can be taken in at the intake port 30. An auxiliary device is disposed between the duct 16a and the duct 16b. For this reason, it is possible to lengthen the flat part formed in the surface of the transformer main body 12 and the cover 37a which covers an auxiliary device, and the surface of the cover 37b by the length of an auxiliary device in the X direction. That is, since the run-up distance for reattachment of the traveling wind 33 can be extended, more traveling wind 33 can be taken in a limited area.

  One factor that increases the reattachment distance of the separated traveling wind 33 is a vertical vortex generated between the traveling wind 33 and the device. The longer the distance between the duct 16a and the duct 16b arranged relative to each other in the X direction with the transformer main body 12 in between, the reattachment of the separated traveling wind 33 is promoted. However, if the oil pump 13 and the conservator 15 having different heights are arranged in the middle, unnecessary vortices are generated on the surface, and the traveling wind 33 cannot be efficiently taken in at the intake port 30. Since the cover 37a and the cover 37b are provided such that their upper surfaces are at the same height as the upper surface of the transformer body 12, the generation of such vortices can be suppressed.

  FIG. 13 is a top view showing a configuration in the case of a modified example of the vehicle transformer according to the second embodiment of the present invention. FIG. 14 is a perspective view showing duct 16d of vehicular transformer 10c according to Embodiment 2 of the present invention. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted. In FIG. 14, a connecting portion 35 b that connects between the air inlet 30 and the air inlet 31 of the duct 16 d is provided. As shown in FIGS. 13 and 14, the duct 16 d has a longer length in the −X direction than the duct 16 b according to the first embodiment. Here, a portion of the duct 16d that is connected to the air supply port 31 of the connecting portion 35b extends in the −X direction. The duct 16c has the same configuration as that of the duct 16d, and only the arrangement is different, so that the description thereof is omitted. Needless to say, the duct 16c and the duct 16d may have different structures. In this case, the shape of the duct can be changed according to the configuration of the peripheral device 3 of the vehicle 1, and the cooling performance can be further improved.

  When the auxiliary device is disposed between the transformer main body 12 and the duct 16c and the duct 16d, the vehicle transformer is different from the vehicle transformer 10b having the cooler 14b extended in the X direction by the amount of the auxiliary device. 10c makes the part which continues to the air supply port 31 of the connection part 35b long. Instead of extending the cooler 14a, the portions of the duct 16c and the duct 16d that are connected to the air supply port 31 of the connecting portion 35b are extended. Therefore, the weight of the vehicle transformer 10c can be reduced.

  FIG. 15 is a side view showing a modification of the vehicular transformer according to the second embodiment of the present invention arranged on the roof 2 of the vehicle 1. As shown in FIG. 15, a cover 37c and a cover 37d having different shapes are provided instead of the cover 37a and the cover 37b. The cover 37c is formed so that the upper surface gradually becomes lower from the transformer main body 12 side toward the duct 16c side. Similarly, the cover 37d is formed so that the upper surface gradually becomes lower from the transformer body 12 side toward the duct 16d side. Therefore, in the vehicular transformer 10c, the intake port 30 of the duct 16c and the duct 16d can be formed larger, and more traveling wind 33 can be taken in.

  Moreover, the cover may be comprised with the board | plate material with a small aperture ratio like a punching metal. In this case, the punching metal having a small opening ratio can suppress the influence of the traveling wind 33 on the duct 16 from being guided, and the air warmed in the cover can be released to the outside of the cover, thereby improving the heat dissipation of the cover. be able to.

  In Embodiment 2, two ducts are provided, but it goes without saying that only one duct may be provided at a position in the + X direction of the transformer body. In this case, a duct 16d may be provided on the rear side in the traveling direction of the vehicle with respect to the position where the traveling wind peeled off by the peripheral device 3 ahead in the traveling direction of the vehicle reattaches to the surface of the transformer body 12. In this case, it is possible to take in the traveling wind outside the stagnation region at the intake port, and it is possible to effectively cool the transformer body.

  In the second embodiment, the duct having the same structure is provided so that the air inlet 30 and the air inlet 31 are opposed to the transformer body in the X direction. Thereby, even when the traveling direction of the vehicle is changed, the same cooling performance of the vehicular transformer as that before the traveling direction is changed can be obtained. The second embodiment of the present invention has been described above.

DESCRIPTION OF SYMBOLS 1 Vehicle, 2 roof top, 9 winding, 10a, 10b, 10c Transformer for vehicles, 11 Piping, 12 Transformer main body, 13 Oil pump, 14a, 14b Cooler, 15 Conservator, 16a, 16b, 16c, 16d Duct, 19a Cooling pipe, 20 Outermost surface, 30 Air inlet, 31 Air inlet, 32 Recess, 35a, 35b Connecting part, 37a, 37b, 37c, 37d Cover.

Claims (12)

A transformer body having windings and connected to piping through which refrigerant oil circulates;
An oil pump for circulating the refrigerant oil through the pipe;
A cooler connected to the pipe for cooling the refrigerant oil;
A first air intake port that takes in a traveling wind generated by traveling of the vehicle, a first air feeding port that feeds the traveling wind as cooling air toward the cooler, the first air intake port, and the first air inlet. The traveling air is guided so that the air blowing direction is opposite to the traveling direction of the vehicle, and the guided traveling air is used as the cooling air from the first air feeding port. A vehicular transformer comprising: a first connecting portion to be discharged; and a first duct provided behind the transformer main body and the cooler in a traveling direction of the vehicle. The vehicle transformer according to claim 1, wherein the transformer body, the oil pump, and the cooler are provided on a roof of the vehicle. The first air inlet and the first air inlet are provided at positions separated from each other in at least one of a vehicle width direction and a vehicle height direction. 2. The vehicle transformer according to 2. The first duct is disposed such that the upper surface of the transformer main body and the lower surface of the first air intake port are at the same height, and a recess capable of penetrating the pipe is provided on the lower surface. The vehicular transformer according to any one of claims 1 to 3. A second air inlet provided opposite to the first air inlet; a second air inlet provided opposite to the first air inlet; the second air inlet; A second connecting portion that connects the second air supply port, and includes a second duct provided forward in the traveling direction of the vehicle with respect to the transformer body and the cooler,
The second connecting portion guides the taken-in wind so that the blowing direction of the wind taken in at the second intake port is opposite to the cooler via the second air-feeding port. The vehicular transformer according to any one of claims 1 to 4, wherein the vehicular transformer is discharged. The second air inlet and the second air inlet are provided at positions separated from each other in at least one of a vehicle width direction and a vehicle height direction. Transformer for vehicles. The second duct is disposed so that the upper surface of the transformer main body and the lower surface of the second air inlet are at the same height, and a recess capable of penetrating the pipe is provided on the lower surface. The vehicular transformer according to claim 5 or 6. The vehicular transformer according to any one of claims 1 to 7, wherein a plurality of the coolers are provided on both side surfaces of the transformer main body in a vehicle width direction. . The cooler has a plurality of cooling pipes formed in an inverted U shape,
The vehicular transformer according to any one of claims 1 to 8, wherein an outermost surface, which is a surface of an outer portion of the plurality of cooling pipes, is formed along a vehicle limit. A conservator for absorbing the amount of thermal expansion of the refrigerant oil circulating in the pipe;
A cover covering each of the oil pump and the conservator;
The cover and the transformer main body are arranged in the same position in the vehicle height direction with respect to each other,
The said conservator and the said oil pump are provided in the side near the said transformer main body rather than the said 1st duct and the said 2nd duct. The any one of Claims 5-7 characterized by the above-mentioned. The transformer for vehicles as described in. The upper surface of the cover on the side close to the first duct and the second duct is formed lower than the upper surface of the cover on the side close to the transformer main body. Transformer for vehicles. The vehicle transformer according to claim 10 or 11, wherein the cover is made of a punching metal.

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