Outdoor unit for railroad vehicles and air conditioning device for railroad vehicles

Abstract

To provide a compact outdoor machine for a railroad vehicle capable of suppressing the generation of short circuit.SOLUTION: An outdoor machine 1 includes a housing 4 including an inlet port 6 and an exhaust port 5, a heat exchanger 8 arranged inside of the housing 4, and an electric fan 9 enforcing the inflow and outflow of air between the inside of the housing 4 and external environment. The outdoor machine 1 further includes a plurality of exhaust port louvers 11 on an air passage of the exhaust port 5. The mutual interval of the exhaust port louvers 11 in a portion closer to the inlet port 6 is made narrower than the mutual interval of the exhaust port louvers 11 in a portion apart from the inlet port 6.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an outdoor unit for a railway vehicle and an air conditioning device for a railway vehicle. [Background technology]

[0002] The outdoor unit of a railway vehicle air conditioning system installed in a railway vehicle includes a housing having an intake port and an exhaust port, a heat exchanger disposed inside the housing, and a blower that forces air in and out between the inside of the housing and the external environment.

[0003] In an outdoor unit having the above configuration, the phenomenon in which air discharged to the outside through the exhaust port is sucked into the intake port and flows back into the heat exchanger is called a short circuit. When a short circuit occurs, the efficiency of the outdoor unit decreases. Therefore, in an outdoor unit having the above configuration, it is desirable to position the intake port and the exhaust port sufficiently apart.

[0004] However, when designing a railway vehicle, the cross-sectional size of the railway vehicle must be within the vehicle clearance. In order to ensure the necessary passenger compartment volume within the cross-sectional size constraints imposed by the vehicle clearance, it is desirable for the outdoor unit to be small. On the other hand, in order to facilitate the flow of air in and out of the housing and improve the performance of the heat exchanger, it is desirable for the opening areas of the intake and exhaust ports to be large. Therefore, in outdoor units for railway vehicles, there is a problem in that it is difficult to arrange the intake and exhaust ports sufficiently apart.

[0005] Accordingly, several inventions have already been disclosed that aim to suppress the occurrence of short circuits in outdoor units for railway vehicles in which the air intake is adjacent to the air exhaust.

[0006] The outdoor unit for railcars described in Patent Document 1 has an exhaust port covered with an outlet duct that opens to the front and rear of the vehicle in the traveling direction. According to this invention, the air that leaves the exhaust port while the vehicle is running is mixed in the outlet duct with high-speed air that flows in from the opening at the front of the vehicle in the traveling direction, and is discharged from the opening at the rear of the vehicle in the traveling direction, and flows away to the rear of the vehicle in the traveling direction. Therefore, the air that leaves the exhaust port does not flow into the intake port located to the side of the exhaust port. As a result, the occurrence of a short circuit is suppressed.

[0007] The outdoor unit for railway vehicles described in Patent Document 2 reduces the occurrence of short circuits by blocking part of the exhaust port opening, thereby reducing the velocity component of the air flow emitted from the exhaust port toward the intake port. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Utility Model Application Publication No. 04-80752 [Patent Document 2] JP 2001-10489 A Summary of the Invention [Problem to be solved by the invention]

[0009] However, the invention described in Patent Document 1 has a problem in that the height of the outdoor unit is increased because the duct is placed on top of the housing of the outdoor unit, which limits the height of the vehicle body and results in a problem in that the spatial volume inside the vehicle cabin is reduced.

[0010] In the invention described in Patent Document 2, the area in which the exhaust port is located is limited to directly above the rotational plane of the blower blades, and there is an area in that area where the exhaust port cannot be located, which reduces the opening area of ​​the exhaust port, resulting in the problem that the exhaust of air is hindered.

[0011] The present disclosure has been made in consideration of the above problems, and provides a compact outdoor unit for railway vehicles that suppresses the occurrence of short circuits, and also provides an air conditioning system for railway vehicles that includes the outdoor unit for railway vehicles. [Means for solving the problem]

[0012] In order to achieve the above object, the present disclosure provides an outdoor unit for a railway vehicle, comprising a housing having an intake port and an exhaust port, a heat exchanger disposed inside the housing, It is an axial flow fan that is arranged facing the exhaust port and pushes the air inside the housing toward the outside environment. and a blower. The railcar outdoor unit according to the present disclosure guides air introduced from the external environment through an air intake port to a heat exchanger, and releases the air that has passed through the heat exchanger and completed heat exchange to the external environment through an exhaust port. Furthermore, the railcar outdoor unit according to the present disclosure has a radiator for radiating heat to the external environment through the exhaust port. Equipped with multiple exhaust louvers. In addition, in a cross-sectional shape obtained by cutting the outdoor unit for a railway vehicle along a plane perpendicular to the running direction of the said railway vehicle, The spacing between the vent louvers is It is wider at the center of the airflow blown out from the axial flow fan and narrows as it moves away from the center. Effect of the Invention

[0013] According to the present disclosure, a plurality of exhaust port louvers are provided on the air passage of the exhaust port, and the spacing between the exhaust port louvers at a portion closer to the intake port is narrower than the spacing between the exhaust port louvers at a portion farther from the intake port, thereby suppressing the occurrence of short circuits. According to the present disclosure, the exhaust port can be adjacent to the intake port, so that the outdoor unit can be configured compactly. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1A is a plan view showing the external shape of an outdoor unit according to a first embodiment of the present disclosure; FIG. 1B is a cross-sectional view showing the outdoor unit shown in FIG. 1A, cut along the plane indicated by line AA′ in FIG. 1A; and FIG. 1C is a cross-sectional view showing the outdoor unit shown in FIG. 1A, cut along the plane indicated by line BB′ in FIG. [Diagram 2] An enlarged cross-sectional view of the outdoor unit shown in FIG. 1(B). [Diagram 3] FIG. 1(B) is a cross-sectional view showing a cross-sectional shape of an outdoor unit according to a second embodiment of the present disclosure. [Figure 4] FIG. 1B is a cross-sectional view showing the cross-sectional shape of an outdoor unit according to a first modified example of the present disclosure. [Diagram 5] FIG. 1B is a cross-sectional view showing a cross-sectional shape of an outdoor unit according to a second modified example of the present disclosure. [Figure 6] FIG. 1C is a cross-sectional view showing a cross-sectional shape of an outdoor unit according to a third modified example of the present disclosure. [Figure 7] FIG. 1(C) is a cross-sectional view showing the cross-sectional shape of an outdoor unit according to a fourth modified example of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, configurations and operations of outdoor units for railway vehicles according to embodiments of the present disclosure and modifications thereof will be described in detail with reference to the drawings. Note that in each drawing, the same reference numerals are used to denote the same or equivalent parts.

[0016] (First embodiment) Fig. 1(A) is a plan view showing the external shape of an outdoor unit 1 according to a first embodiment of the present disclosure. Fig. 1(B) is a cross-sectional view showing the outdoor unit 1 cut along the plane indicated by line AA' in Fig. 1(A). Fig. 1(C) is a cross-sectional view showing the outdoor unit 1 cut along the plane indicated by line BB' in Fig. 1(B). Fig. 2 is a cross-sectional view of the outdoor unit showing an enlarged portion of Fig. 1(B).

[0017] The outdoor unit 1 is a component of an air conditioner for railroad cars (not shown) and is connected to an indoor unit (not shown). In other words, the outdoor unit 1 is an outdoor unit for railroad cars. A refrigerant fluid circulates between the outdoor unit 1 and the indoor unit, and heat is transported between them. When the air conditioner is operated in a cooling mode, the indoor unit absorbs heat from the air in the passenger compartment, carries it in a heat transfer fluid, and sends it to the outdoor unit 1. The outdoor unit 1 releases the heat carried by the air sent out from the indoor unit to the atmosphere, and then returns the heat transfer fluid to the indoor unit. When the air conditioner is operated in a heating mode, the outdoor unit 1 absorbs heat from the atmosphere, carries it in a heat transfer fluid, and sends it to the indoor unit. The indoor unit releases the heat carried by the air sent out from the outdoor unit 1 to the air in the passenger compartment, and then returns the heat transfer fluid to the outdoor unit 1.

[0018] As shown in Figs. 1(A) to (C), an outdoor unit 1 is mounted on the roof 2 of a railway vehicle (not shown). The outdoor unit 1 has a housing 4, and components of the outdoor unit 1, which will be described later, are located inside the housing 4 and are arranged symmetrically with respect to the center line 3 of the railway vehicle. In Figs. 1(A) and 1(C), the vertical direction of the drawings corresponds to the running direction of the railway vehicle. That is, in Figs. 1(A) and 1(C), the railway vehicle runs in the vertical direction of the drawings. In Fig. 1(B), the direction perpendicular to the paper surface corresponds to the running direction of the railway vehicle.

[0019] As shown in Fig. 1(A) and Fig. 1(B), the housing 4 is formed with an exhaust port 5 and an intake port 6. The exhaust port 5 is an opening for discharging air inside the housing 4 to the outside environment, and is disposed on the center line 3 of the railway vehicle. The intake port 6 is an opening for introducing air from the outside environment into the inside of the housing 4. The intake ports 6 are formed in two places, and are disposed symmetrically with respect to the center line 3 on both sides of the exhaust port 5. As shown in Fig. 1(A), the exhaust port 5 and the intake port 6 are covered with a cover 7. A large number of small holes 7a are formed in the cover 7, and air enters and leaves the housing 4 through the small holes 7a.

[0020] As shown in Fig. 1(B), two heat exchangers 8 and one electric fan 9 are disposed inside the housing 4. The electric fan 9 is disposed in an internal space 10 of the housing 4. The heat exchanger 8 is disposed midway along a flow path from the intake port 6 toward the internal space 10. The electric fan 9 is an example of a blower according to the present disclosure, and in this embodiment, it functions as an exhaust means that pushes air in the internal space 10 toward the exhaust port 5 and exhausts it to the external environment.

[0021] In Fig. 1(A), the outline of the rotation plane of electric fan 9 is shown by a dashed line. As shown in Fig. 1(A), the outline of exhaust port 5 in plan view is outside the outline of the rotation plane of electric fan 9. Thus, in outdoor unit 1, the area in which exhaust port 5 is located is not limited to directly above the rotation plane of electric fan 9.

[0022] When the electric fan 9 is operated to push the air inside the internal space 10 towards the exhaust port 5, the air pressure on the leeward side of the electric fan 9 becomes relatively lower than the external environment. Therefore, air from the external environment is sucked in through the intake port 6, passes through the heat exchanger 8 and flows into the internal space 10. While the air passes through the heat exchanger 8, heat exchange occurs between the air and the heat transfer fluid. The air that has completed the heat exchange and flowed into the internal space 10 is discharged through the exhaust port 5 to the external environment.

[0023] As shown in Fig. 1(B), a plurality of exhaust port louvers 11 are arranged parallel to one another on the air passage toward the exhaust port 5 inside the housing 4 and are fixed to the housing 4. As shown in Fig. 1(C), the exhaust port louvers 11 are elongated, rectangular flat plates and are arranged with their longitudinal direction parallel to the center line 3 of the railway vehicle (not shown).

[0024] In the cross-sectional shape shown in Fig. 1(B), the exhaust port louvers 11 hang down perpendicularly to the exhaust port 5. Therefore, the air discharged from the exhaust port 5 is guided by the exhaust port louvers 11 and flows vertically upward in Fig. 1(B).

[0025] 2, the spacing d1 between the exhaust port louvers 11 at both ends of the exhaust port 5, i.e., at the portions close to the intake port 6 of the exhaust port 5, is narrower than the spacing d2 between the exhaust port louvers 11 at the center of the exhaust port 5, i.e., at the portions farther from the intake port 6 of the exhaust port 5. In other words, the spacing between the exhaust port louvers 11 is wider at the portions farther from the intake port 6 and narrower at the portions close to the intake port 6.

[0026] In this way, the exhaust port louvers 11 are arranged more densely in the area close to the intake port 6 of the exhaust port 5 than in the area far from the intake port 6. Therefore, the air passing through the area close to the intake port 6 of the exhaust port 5 is strongly influenced by the exhaust port louvers 11 to guide the air vertically upward. Therefore, the generation of air flow from that area toward the intake port 6 is suppressed. As a result, the occurrence of short circuiting is suppressed.

[0027] On the other hand, in the center of the exhaust port 5, that is, in the area away from the intake port 6, it is difficult for a flow toward the intake port to occur, so the exhaust port louvers 11 are arranged relatively sparsely. Therefore, the flow resistance is small in this area, and the air is efficiently exhausted.

[0028] In this way, the exhaust port louvers 11 guide the air discharged from the exhaust port 5 in a direction away from the intake port 6. As a result, the occurrence of short circuits is suppressed.

[0029] (Second embodiment) Fig. 3 is a cross-sectional view showing the cross-sectional shape of the outdoor unit 1 according to the second embodiment of the present disclosure following Fig. 1(B). The basic configuration and operation of the outdoor unit 1 according to the second embodiment are common to the outdoor unit 1 according to the first embodiment. Therefore, a description of the basic configuration and operation of the outdoor unit 1 according to the second embodiment will be omitted.

[0030] The outdoor unit 1 according to the second embodiment is characterized in that, in the cross-sectional shape shown in FIG. 3, the exhaust port louvers 11 are inclined with respect to the exhaust port 5, and the direction of inclination is different between the left and right sides. That is, in FIG. 3, the upper end of the exhaust port louvers 11 arranged in the left half region of the exhaust port 5, that is, the end on the outlet side or downwind side, is inclined to the right side of the figure. In the left half region of the exhaust port 5, inclining the upper end of the exhaust port louvers 11 to the right side of the figure means that the upper end of the exhaust port louvers 11 is inclined in a direction away from the intake port 6 adjacent to the left side of the exhaust port 5. On the other hand, in FIG. 3, the upper end of the exhaust port louvers 11 arranged in the right half region of the exhaust port 5 is inclined to the left side of the figure. In the right half region of the exhaust port 5, inclining the upper end of the exhaust port louvers 11 to the left side of the figure means that the upper end of the exhaust port louvers 11 is inclined in a direction away from the intake port 6 adjacent to the right side of the exhaust port 5.

[0031] Thus, in the outdoor unit 1 according to the second embodiment, all of the exhaust port louvers 11 are attached to the housing 4 with their upper ends, i.e., the ends on the outlet side or downwind side, inclined in a direction away from the intake port 6. Therefore, as shown in Fig. 3, air passing between the exhaust port louvers 11 is guided in a direction away from the intake port 6. As a result, the generation of an air flow from the exhaust port 5 toward the intake port 6 is suppressed, and the occurrence of a short circuit is suppressed.

[0032] In the outdoor unit 1 according to the second embodiment, as in the outdoor unit 1 according to the first embodiment, the spacing between the exhaust port louvers 11 at the portion closer to the intake port 6 may be narrower than the spacing between the exhaust port louvers 11 at the portion farther from the intake port 6.

[0033] (First Modification) FIG. 4 is a cross-sectional view showing the cross-sectional shape of the outdoor unit 1 according to the first modified example of the present disclosure following FIG. 1(B). As shown in FIG. 4, the outdoor unit 1 according to the first modified example is characterized in that an intake port 6 is arranged in the center of the housing 4, and exhaust ports 5 are arranged on both sides of the intake port 6. The outdoor unit 1 according to the first modified example differs from the outdoor units 1 according to the first and second embodiments in this respect. In the outdoor unit 1 according to the first modified example, the electric fan 9 functions as an intake means for drawing air from the external environment into the internal space 10 of the housing 4. Therefore, in the outdoor unit 1 according to the first modified example, as shown in FIG. 4, the air from the external environment is drawn in by the electric fan 9 and flows into the internal space 10. The air that flows into the internal space 10 passes through the heat exchanger 8 and the exhaust port 5 and is discharged to the external environment.

[0034] The outdoor unit 1 according to the first modified example also has a plurality of exhaust port louvers 11. Then, as shown in Fig. 4, the intervals between the exhaust port louvers 11 at the positions closer to the intake port 6 of the exhaust port 5 are narrower than the intervals between the exhaust port louvers 11 at the positions farther from the intake port 6.

[0035] In this way, the exhaust port louvers 11 are arranged more densely in the area close to the intake port 6 of the exhaust port 5 than in the area far from the intake port 6. Therefore, the exhaust port louvers 11 strongly guide the air passing through the area close to the intake port 6 of the exhaust port 5 in a direction away from the intake port 6, thereby suppressing the occurrence of a short circuit. Note that in the area far from the intake port 6 of the exhaust port 5, it is difficult for a flow toward the intake port 6 to occur, so the exhaust port louvers 11 are arranged relatively sparsely. Therefore, the flow resistance is small in that area, and air is efficiently exhausted from that area.

[0036] (Second Modification) 5 is a cross-sectional view showing the cross-sectional shape of an outdoor unit 1 according to a second modified example of the present disclosure following FIG. 1(B). The basic configuration of the outdoor unit 1 according to the second modified example is common to the outdoor unit 1 according to the first modified example. That is, the outdoor unit 1 according to the second modified example is also characterized in that an intake port 6 is disposed in the center of the housing 4, and exhaust ports 5 are disposed on both sides of the intake port 6. Moreover, in the outdoor unit 1 according to the third modified example, the electric fan 9 functions as an intake fan that draws air from the external environment into the internal space 10 of the housing 4.

[0037] The outdoor unit 1 according to the second modified example also includes a plurality of exhaust port louvers 11. In FIG. 5, the upper end of the exhaust port louver 11 attached to the exhaust port 5 arranged on the left side of the intake port 6, i.e., the end on the outlet side or downwind side, is inclined to the left side of the figure. The upper end of the exhaust port louver 11 attached to the exhaust port 5 arranged on the right side of the intake port 6 is inclined to the right side of the figure. In this way, the upper ends of the exhaust port louvers 11 attached to the exhaust ports 5 arranged on the left and right of the intake port 6, i.e., the end on the outlet side or downwind side, are all inclined in a direction away from the intake port 6.

[0038] Therefore, in the outdoor unit 1 according to the second modification, the air that passes through the exhaust port louvers 11 and is discharged to the outside environment is guided in a direction away from the intake port 6. As a result, the occurrence of a short circuit is suppressed.

[0039] (Third Modification) FIG. 6 is a cross-sectional view showing the cross-sectional shape of the outdoor unit 1 according to the third modified example of the present disclosure following FIG. 1(C). In the first embodiment, an example was shown in which the exhaust port louver 11 is configured with a simple rectangular flat plate, but the exhaust port louver 11 is not limited to being configured with a simple rectangular flat plate. As shown in FIG. 6, the exhaust port louver 11 may have a shape in which a portion interfering with the fan blade 9a of the electric fan 9 is removed in accordance with the fan blade 9a. By removing the portion interfering with the fan blade 9a, the area of ​​the exhaust port louver 11 appearing in FIG. 6 can be enlarged in the portion not interfering with the fan blade 9a. In addition, the exhaust port louver 11 can be brought closer to the electric fan 9.

[0040] In this way, the outdoor unit 1 according to the third modified example has a larger area of ​​the exhaust port louver 11 than the outdoor unit 1 according to the first embodiment. Also, the exhaust port louver 11 is disposed close to the electric fan 9. Therefore, a force that guides the air passing through the exhaust port louver 11 vertically upward acts stronger than in the outdoor unit 1 according to the first embodiment. As a result, the occurrence of short circuiting is further suppressed.

[0041] (Fourth Modification) FIG. 7 is a cross-sectional view showing the cross-sectional shape of the outdoor unit 1 according to the fourth modified example of the present disclosure following FIG. 1(C). In the first embodiment and the third modified example, an example in which the exhaust port louver 11 is composed of one continuous flat plate in the length direction has been shown, but the exhaust port louver 11 is not limited to being composed of one continuous flat plate. As shown in FIG. 7, the exhaust port louver 11 may be divided into three flat plates 11a, 11b, and 11c in the length direction. In this way, by dividing the exhaust port louver 11 into a plurality of flat plates, the exhaust port louver 11 can be arranged while avoiding the portion that interferes with the fan blades 9a of the electric fan 9.

[0042] In the outdoor unit 1 according to the fourth modified example, the area of ​​the exhaust port louver 11 is also made larger than that of the outdoor unit 1 according to the first embodiment. Therefore, a force that guides the air passing through the exhaust port louver 11 vertically upward acts stronger than that of the outdoor unit 1 according to the first embodiment. As a result, the occurrence of short circuiting is further suppressed.

[0043] As described above, in the outdoor unit 1 according to the above embodiment and modified example, the flow of air discharged from the exhaust port 5 is guided in a direction away from the intake port 6 by the exhaust port louver 11, thereby suppressing the occurrence of short circuiting. As a result, the performance of the outdoor unit 1 is improved.

[0044] In addition, since the shape and dimensions of the exhaust port 5 are not limited by the shape and dimensions of the rotation surface of the electric fan 9, the shape and dimensions of the exhaust port 5 can be enlarged, thereby improving the performance of the outdoor unit 1.

[0045] In the outdoor unit 1 according to the above embodiment and modified examples, there are no components that protrude or are exposed to the outside of the housing 4, so that the outdoor unit 1 can be configured compactly.

[0046] However, the technical scope of the present disclosure is not limited to the above-mentioned embodiment and modified examples. The present disclosure can be freely applied, modified, or improved within the scope of the technical ideas described in the claims.

[0047] In the above embodiment and modified example, an example has been shown in which the outdoor unit 1 is installed on the roof 2 of a railway vehicle, but the outdoor unit according to the present disclosure is not limited to being installed on the roof of a railway vehicle. The outdoor unit according to the present disclosure may be installed under the floor of a railway vehicle.

[0048] In the above description, the longitudinal direction of the exhaust louvers is said to be "parallel" to the running direction of the railcar, but "parallel" is not limited to being parallel in the strict geometric sense. In this disclosure, it can be considered to be parallel as long as it does not disturb the air flow when the railcar is running. For example, an inclination of about ±5° is permissible. The exhaust louvers need only be designed to be arranged parallel to the running direction of the railcar. Machining errors are naturally permissible. Errors due to subsequent deformation are also permissible.

[0049] First of all, in the present disclosure, the exhaust port louvers are not limited to those whose longitudinal direction is arranged parallel to the running direction of the railcar. The exhaust port louvers do not have to be arranged whose longitudinal direction is parallel to the running direction of the railcar.

[0050] Further, in the above embodiment and modified examples, an example has been shown in which multiple exhaust port louvers 11 are arranged parallel to each other, but in the present disclosure, the multiple exhaust port louvers are not limited to being arranged parallel to each other.

[0051] In the above embodiment and modified examples, an example in which the outdoor unit 1 is provided with one exhaust port 5 and two intake ports 6, and an example in which the outdoor unit 1 is provided with two exhaust ports 5 and one intake port 6 have been shown, but the combination of the numbers of exhaust ports 5 and intake ports 6 provided in the outdoor unit 1 is not limited to these. The numbers of exhaust ports 5 and intake ports 6 can be freely selected.

[0052] In the above embodiment and modified examples, the outdoor unit 1 is provided with two heat exchangers 8, but the number of heat exchangers 8 provided in the outdoor unit 1 is not limited to two. The number of heat exchangers 8 provided in the outdoor unit 1 can be freely selected.

[0053] The number of exhaust port louvers 11 shown in each drawing is an example, and the number of exhaust port louvers 11 provided in the outdoor unit 1 is not limited to that shown in the drawings. The number of exhaust port louvers 11 provided in the outdoor unit 1 can be freely selected.

[0054] The shapes of the exhaust port louvers 11 shown in each drawing are examples, and the shape of the exhaust port louvers 11 provided in the outdoor unit 1 is not limited to those shown. The shape of the exhaust port louvers 11 provided in the outdoor unit 1 can be freely selected. In particular, the cross-sectional shape of the exhaust port louvers 11 is rectangular in Fig. 1(B) and Figs. 2 to 5, but the cross-sectional shape of the exhaust port louvers 11 is not limited to a rectangle. If the cross-sectional shape shown in Fig. 1(B) and Figs. 2 to 5 is wing-shaped, the flow resistance of the exhaust port 5 can be reduced.

[0055] The dimensions of the exhaust port louver 11, particularly the dimensions of the cross-sectional shape shown in Fig. 1(B) and Fig. 2 to 5, can be selected arbitrarily according to design constraints. In addition, by increasing the thickness of the exhaust port louver 11, i.e., the horizontal dimension of the cross-sectional shape shown in Fig. 1(B) and Fig. 2 to 5, the rigidity around the exhaust port 5 is improved. As a result, it becomes possible to increase the dimensions of the small holes 7a in the cover 7 and reduce the flow resistance of the exhaust port 5.

[0056] In the above embodiment and modified examples, the outdoor unit 1 is shown to have a housing 4 that is independent from the body of the railway vehicle, but the outdoor unit 1 is not limited to having an independent housing 4. All or part of the housing 4 may be part of the body of the railway vehicle. [Explanation of symbols]

[0057] 1 outdoor unit, 2 railroad car roof, 3 center line of railroad car, 4 housing, 5 exhaust port, 6 intake port, 7 cover, 7a small hole, 8 heat exchanger, 9 electric fan, 9a fan blade, 10 internal space, 11 exhaust port louver

Claims

1. A housing having an intake port and an exhaust port; a heat exchanger disposed inside the housing; an axial flow fan disposed inside the housing facing the exhaust port and configured to push air inside the housing toward an external environment, An outdoor unit for a railway vehicle, which introduces air from an external environment through the air intake port into the heat exchanger, and releases the air that has passed through the heat exchanger and completed heat exchange into the external environment through the air exhaust port, The exhaust port is provided with a plurality of exhaust port louvers arranged with a longitudinal direction parallel to a running direction of the railway vehicle, In a cross-sectional shape obtained by cutting the outdoor unit for a railway vehicle along a plane perpendicular to the running direction of the railway vehicle, The spacing between the exhaust port louvers is wider at the center of the airflow blown out from the axial flow fan and narrower as it moves away from the center. Outdoor unit for railway vehicles.

2. A housing having an intake port and an exhaust port; a heat exchanger disposed inside the housing; an axial flow fan disposed inside the housing facing the exhaust port and configured to push air inside the housing toward an external environment, An outdoor unit for a railway vehicle, which introduces air from an external environment through the air intake port into the heat exchanger, and releases the air that has passed through the heat exchanger and completed heat exchange into the external environment through the air exhaust port, The exhaust port is provided with a plurality of exhaust port louvers arranged with a longitudinal direction parallel to a running direction of the railway vehicle, In a cross-sectional shape obtained by cutting the outdoor unit for a railway vehicle along a plane perpendicular to the running direction of the railway vehicle, The outlet side ends of all the exhaust port louvers are inclined in a direction approaching the center of the air flow blown out from the axial flow fan. Outdoor unit for railway vehicles.

3. A housing having an intake port and an exhaust port; a heat exchanger disposed inside the housing; a blower for forcing air in and out between the inside of the housing and the outside environment, An outdoor unit for a railway vehicle, which introduces air from an external environment through the air intake port into the heat exchanger, and releases the air that has passed through the heat exchanger and completed heat exchange into the external environment through the air exhaust port, The exhaust port is provided with a plurality of exhaust port louvers arranged with a longitudinal direction parallel to a running direction of the railway vehicle, In a cross-sectional shape obtained by cutting the outdoor unit for a railway vehicle along a plane perpendicular to the running direction of the railway vehicle, The exhaust port louvers have an inclination that guides the flow of air discharged from the exhaust port in a direction away from the intake port, and the inclination of all the exhaust port louvers is made equal; Furthermore, the spacing between the exhaust port louvers in a portion closer to the intake port is narrower than the spacing between the exhaust port louvers in a portion farther from the intake port. Outdoor unit for railway vehicles.

4. A housing having an intake port and an exhaust port; a heat exchanger disposed inside the housing; a blower for forcing air between the interior of the enclosure and the external environment; A plurality of exhaust port louvers are provided on the air passage of the exhaust port, The distance between the exhaust louvers near the intake port is the distance between the exhaust port louvers is narrower than the distance between the exhaust port louvers at the other end of the exhaust port louvers, The exhaust port louver has a shape in which a portion interfering with a fan blade of the blower is removed. Outdoor unit for railway vehicles.

5. A housing having an intake port and an exhaust port; a heat exchanger disposed inside the housing; a blower for forcing air between the interior of the enclosure and the external environment; A plurality of exhaust port louvers are provided on the air passage of the exhaust port, The exhaust port louver has an outlet side end inclined in a direction away from the intake port, The exhaust port louver has a shape in which a portion interfering with a fan blade of the blower is removed. Outdoor unit for railway vehicles.

6. A housing having an intake port and an exhaust port; a heat exchanger disposed inside the housing; a blower for forcing air between the interior of the enclosure and the external environment; A plurality of exhaust port louvers are provided on the air passage of the exhaust port, The distance between the exhaust louvers near the intake port is the distance between the exhaust port louvers is narrower than the distance between the exhaust port louvers at the other end of the exhaust port louvers, The exhaust port louver is divided into a plurality of flat plates in the longitudinal direction, The plurality of flat plates are arranged so as to avoid a portion that would interfere with the fan blades of the blower. Outdoor unit for railway vehicles.

7. A housing having an intake port and an exhaust port; a heat exchanger disposed inside the housing; a blower for forcing air between the interior of the enclosure and the external environment; A plurality of exhaust port louvers are provided on the air passage of the exhaust port, The exhaust port louver has an outlet side end inclined in a direction away from the intake port, The exhaust port louver is divided into a plurality of flat plates in the longitudinal direction, The plurality of flat plates are arranged so as to avoid a portion that would interfere with the fan blades of the blower. Outdoor unit for railway vehicles.

8. A single exhaust port and two intake ports are provided, The exhaust port is disposed between the two intake ports. The outdoor unit for a railway vehicle according to any one of claims 1 to 7.

9. The exhaust port includes two exhaust ports and the intake port. The intake port is disposed between the two exhaust ports. The outdoor unit for a railway vehicle according to any one of claims 1 to 7.

10. A system including one of the blowers and two of the heat exchangers, The blower functions as an exhaust means for pushing air that flows from the outside of the housing through each of the two air intakes into the inside of the housing and has passed through the two heat exchangers toward the exhaust port. The outdoor unit for a railway vehicle according to any one of claims 1 to 7.

11. A system including one of the blowers and two of the heat exchangers, The blower functions as an intake means for sucking in air from outside the housing through the intake port, and the air flowing in from outside the housing through the intake port passes through each of the two heat exchangers and then is discharged to the outside of the housing. The outdoor unit for a railway vehicle according to claim 3.

12. The outline of the planar shape of the exhaust port is outside the outline of the rotation surface of the blower. The outdoor unit for a railway vehicle according to any one of claims 1 to 7.

13. A railway vehicle air-conditioning apparatus comprising the railway vehicle outdoor unit according to any one of claims 1 to 12.

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