JP6324463B2 - Railway vehicle air conditioner outdoor unit and railway vehicle air conditioner - Google Patents

Description

  The present invention relates to an outdoor unit of an air conditioner for a railway vehicle and an air conditioner for a railway vehicle that are mounted on the railway vehicle.

  An outdoor unit of an air conditioner for a railway vehicle is generally installed under the floor or ceiling of the vehicle. Such a conventional outdoor unit includes a heat exchanger that exchanges heat between the traveling wind of the vehicle and the refrigerant and discharges the heat-exchanged traveling wind. On the side surface of the vehicle, there are formed a communication port on the air channel inlet side and a communication port on the air channel outlet side that are opened obliquely with respect to the front-rear direction of the vehicle. Forming. The traveling wind that has flowed in from the communication port on the airway inlet side collides with a damper that blocks the communication port on the airway outlet side, and all the traveling wind that has flowed in from the communication port on the airway inlet side passes through the heat exchanger. The traveling wind that has passed through the heat exchanger is discharged out of the vehicle through an exhaust port formed in the vehicle side wall (for example, Patent Document 1).

JP-A-4-38264 (Claim 1, FIG. 1)

  In Patent Document 1, a damper is provided at a position that does not face the heat exchanger so as to completely close the communication port on the air channel outlet side. It is led to the heat exchanger after it collides with. Therefore, the speed of the wind flowing into the heat exchanger is increased on the air path outlet side, and the speed of the wind flowing into the heat exchanger is decreased on the air path inlet side. As described above, since the wind speed in the heat exchanger has a large distribution, the ability of the heat exchanger cannot be fully utilized.

  Further, in Patent Document 1, since the damper is provided so as to completely block the communication port on the airway outlet side, pebbles and dust contained in the wind may adhere to the heat exchanger and the damper, The heat exchanger may be clogged or the damper may become inoperable.

  The present invention has been made in order to solve the above-described problems. The present invention has been made to make the wind speed distribution more uniform than in the past, making use of the ability of the heat exchanger, and suppressing clogging of the heat exchanger and inoperability of the damper. An object of the present invention is to provide an outdoor unit for a railway vehicle air conditioner and a rail vehicle air conditioner.

An outdoor unit of an air conditioner for a railway vehicle according to the present invention is an air conditioner for a railway vehicle that is mounted on a railway vehicle having an air passage formed by an air passage wall along a side surface, a top surface, or a bottom surface. An outdoor unit, a housing having a suction port communicating with the air passage formed in a direction crossing a flow direction of the wind in the air passage during travel of the vehicle, and being housed in the housing, A heat exchanger disposed along a path, and at least one guide provided in the air path so as to face the heat exchanger and closing a part of the air path, wherein the guide is A center line of the heat exchanger extending in a direction orthogonal to the traveling direction of the vehicle is formed symmetrically with respect to the axis of symmetry, and in a direction orthogonal to the traveling direction of the vehicle on the heat exchanger side of the air passage wall. extend and, provided in plural along the air flow direction of the air passage It is those that.
Moreover, the outdoor unit of an air conditioner for a railway vehicle according to the present invention is an air conditioner for a railway vehicle that is mounted on a railway vehicle including an air passage formed by an air passage wall along a side surface, a top surface, or a bottom surface. An outdoor unit of the machine, wherein a suction port communicating with the air passage is formed in a direction crossing a flow direction of the wind in the air passage while the vehicle is running, and is accommodated in the housing, A heat exchanger disposed along the air passage, and at least one guide provided in the air passage so as to face the heat exchanger and blocking a part of the air passage, The heat exchanger is formed symmetrically about a center line of the heat exchanger extending in a direction orthogonal to the traveling direction of the vehicle and is orthogonal to the traveling direction of the vehicle on the heat exchanger side of the air passage wall. In the direction perpendicular to the air channel wall and fixed on the air channel wall. Those disposed to.

  According to the outdoor unit of a railway vehicle air conditioner and the rail vehicle air conditioner according to the present invention, a guide for closing a part of the air passage is provided at a position facing the heat exchanger, and flows into the air passage. A part of the traveling wind of the vehicle collides with the guide and flows into the heat exchanger. Thereby, the difference of the static pressure becomes large between the upstream side and the downstream side of the heat exchanger, and the traveling wind that has flowed into the air passage easily flows into the heat exchanger. Therefore, the wind speed distribution of the wind flowing into the heat exchanger can be made more uniform than before, and the ability of the heat exchanger can be utilized. Further, since pebbles and dust that have flowed into the air passage pass between the heat exchanger and the guide and are discharged from the air passage outlet, clogging in the heat exchanger and the inoperability of the damper can be suppressed.

It is a cross-sectional view which shows the air path structure of the outdoor unit of the vehicle air conditioner which concerns on Embodiment 1 of this invention. It is a cross-sectional view which shows the wind pressure in the air path of the outdoor unit of the conventional vehicle air conditioner. It is a cross-sectional view which shows the wind pressure in the wind path of the outdoor unit of the air conditioner for vehicles which concerns on Embodiment 1 of this invention. It is a cross-sectional view which shows the dimension of a guide among the air path structures of the outdoor unit of the air conditioner for vehicles which concerns on Embodiment 1 of this invention. It is a cross-sectional view which shows the air path structure of the outdoor unit of the vehicle air conditioner which concerns on Embodiment 1 of this invention, and is a modification of FIG. It is a perspective view which shows the air path formation position of the outdoor unit of the vehicle air conditioner which concerns on Embodiment 1 of this invention. It is a cross-sectional view which shows the air path structure of the outdoor unit of the air conditioner for vehicles which concerns on Embodiment 2 of this invention. It is a cross-sectional view which shows the air path structure of the outdoor unit of the vehicle air conditioner which concerns on Embodiment 2 of this invention, and is a modification of FIG. It is a cross-sectional view which shows the air path structure of the outdoor unit of the vehicle air conditioner which concerns on Embodiment 2 of this invention, and is a modification of FIG. It is a cross-sectional view which shows the air path structure of the outdoor unit of the air conditioner for vehicles which concerns on Embodiment 3 of this invention. It is a cross-sectional view which shows the air path structure of the outdoor unit of the vehicle air conditioner which concerns on Embodiment 3 of this invention, and is a modification of FIG. It is a cross-sectional view which shows the air path structure of the outdoor unit of the vehicle air conditioner which concerns on Embodiment 3 of this invention, and is a modification of FIG. It is a cross-sectional view which shows the air path structure of the outdoor unit of the air conditioner for vehicles which concerns on Embodiment 4 of this invention. It is sectional drawing which shows the air path structure of the outdoor unit of the conventional vehicle air conditioner.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing an air path structure of an outdoor unit 50 of an air conditioner for a vehicle according to Embodiment 1 of the present invention, and shows a lower structure of a vehicle body from the upper surface of the vehicle 100. Hereinafter, the structures of the vehicle 100 and the outdoor unit 50 will be described with reference to FIG.

  The vehicle 100 is provided with an outdoor unit 50, a vehicle side wall 3, an air passage 5, an air passage wall 6, an air passage inlet 9, and an air passage outlet 10.

The outdoor unit 50 includes a heat exchanger 1, a fan 2, a guide 7, a housing 20, a compressor (not shown), and the like, and is formed on the floor surface portion of the vehicle 100.
The heat exchanger 1 exchanges heat between the traveling wind of the vehicle 100 and the refrigerant and discharges the heat-exchanged traveling wind. The fan 2 blows air to the heat exchanger 1 when there is little wind flowing into the heat exchanger 1. The guide 7 is provided in the air path 5 (described later) facing the heat exchanger 1. The guide 7 closes a part of the air passage 5. The guide 7 has a substantially flat plate shape, for example. The housing 20 accommodates the heat exchanger 1 and the fan 2. A suction port 17 is formed in the wall surface of the housing 20. An exhaust port 8 is formed on the surface of the housing 20 facing the suction port 17. The suction port 17 is formed in a direction that crosses the flow direction of the wind in the air passage 5 while the vehicle 100 is traveling. The suction port 17 introduces a part of the wind that has flowed into the air passage 5 into the heat exchanger 1. The suction port 17 is formed in the vicinity of the heat exchanger 1. That is, the heat exchanger 1 is formed in a direction that crosses the flow direction of the wind in the air passage 5 while the vehicle 100 is traveling.

  The vehicle side wall 3 is provided on both side surfaces of the vehicle 100. The inclined wall surface 4 is formed on one side surface side of the vehicle side wall 3 so as to be inclined toward the inner side of the side surface portion. The air passage wall 6 is provided so as to face the heat exchanger 1 and constitutes a part of the side surface portion of the vehicle 100. The air passage 5 is provided along the side surface portion of the vehicle 100 between the inclined wall surface 4 and the air passage wall 6. The air passage inlet 9 is an opening through which a part of the traveling wind flows into the air passage 5 when the vehicle 100 travels in the traveling direction 11. The air passage outlet 10 is an opening through which a part of the traveling wind that flows into the air passage 5 flows out when the vehicle 100 travels in the traveling direction 11.

  The heat exchanger 1 may have any form. For example, various fins such as plate fins, corrugated fins, and wave fins can be employed as the fins. In addition, aluminum is generally used as the material for the fin, but any material may be used as long as it has a high thermal conductivity.

  Next, operations of the vehicle 100 and the outdoor unit 50 will be described. When the vehicle 100 travels in the traveling direction 11, traveling wind 12 is generated in a direction opposite to the traveling direction 11. The wind 14 which is a part of the traveling wind 12 flows into the air path 5 from the air path inlet 9, and a part of the wind 14 flows out of the air path outlet 10. A part of the wind 14 (the wind 14 that does not flow out of the air passage outlet 10) passes through the heat exchanger 1 and the fan 2 and is discharged from the exhaust port 8 to the outside of the vehicle. At this time, the wind 14 that flows into the heat exchanger 1 exchanges heat with the fins formed in the heat exchanger 1.

  For example, when the passenger compartment of the vehicle 100 is cooled, the heat in the passenger compartment is transported to the heat exchanger 1 via the refrigerant. Accordingly, during cooling, the temperature of the heat exchanger 1 is normally higher than the outside air temperature. In order to dissipate the heat in the cabin to the atmosphere, the wind is passed through the heat exchanger 1 to exchange heat with the air. In general, the larger the air volume and the smaller the wind speed distribution, the larger the heat exchange amount and the effect that the heat exchanger 1 can be made compact.

  The fan 2 is normally stopped, but when the vehicle 100 is traveling at a low speed, when the air volume guided to the heat exchanger 1 cannot be secured sufficiently, the fan 2 is operated to secure the air volume. Whether or not the air volume is secured is determined by detecting the temperature of the refrigerant on the outlet side of the heat exchanger 1 with a temperature sensor, for example, and the air volume is not secured unless the temperature is a desired temperature.

  Next, the guide 7 is provided by comparing the conventional example in which the guide 7 is not provided in the air passage 5 (FIG. 2) with the first embodiment in which the guide 7 is provided in the air passage 5 (FIG. 3). Thus, it will be explained that the wind speed distribution 15 becomes more uniform than in the prior art.

FIG. 2 is a cross-sectional view for explaining the wind pressure in the air passage 5 of the outdoor unit 50 of the conventional vehicle air conditioner.
The wind 14 that has flowed into the air path 5 flows substantially along the heat exchanger 1. Here, if the total pressure is P _TOTAL , the static pressure is P, the air density is ρ, and the wind speed is V, the total pressure of the sum of static pressure and dynamic pressure is P _TOTAL = P + (1/2) ρV ² It is represented by In general, the total pressure is close to atmospheric pressure. Since the static pressure P is P = P _TOTAL − (½) ρV ² , the static pressure P decreases as the wind speed V increases. That is, the static pressure in the air passage 5 becomes negative as the wind speed in the air passage 5 increases. On the other hand, the static pressure _{P 0} of the exhaust port 8 side, when the wind velocity flowing outside of the exhaust port 8 and _{V 0 P 0 = P} TOTAL - becomes (1/2) ρV ₀ ^2. The amount of wind passing through the heat exchanger 1 increases as the difference P−P ₀ = (½) ρ (V ₀ ² −V ² ) between the static pressures on the supply side and the exhaust side increases. That is, the amount of air flowing from the heat exchanger 1 toward the fan 2 decreases as the wind speed V in the air passage 5 increases.

  Next, the air path structure of the outdoor unit 50 of the vehicle air conditioner according to Embodiment 1 of the present invention will be described. In the air passage structure according to Embodiment 1 of the present invention, a substantially flat guide 7 is formed on the air passage wall 6 in a direction perpendicular to the air passage wall 6.

FIG. 3 is a cross-sectional view showing the wind pressure in the air passage 5 of the outdoor unit 50 of the vehicle air conditioner according to Embodiment 1 of the present invention. The wind 14 that has flowed into the air passage 5 flows substantially along the longitudinal direction of the heat exchanger 1. At this time, a part of the wind 14 collides with the guide 7 disposed in the air path 5 and the wind 14 stagnates, so that the wind speed V in that part becomes almost zero. That is, the static pressure P ′ is equal to the total pressure, and P ′ = P _TOTAL . The amount of wind passing through the heat exchanger 1 increases as the difference in static pressure P′−P ₀ = (1/2) ρV ₀ ² between the supply side and the exhaust side increases. More air volume can be obtained than without 7.

FIG. 4 is a cross-sectional view showing the dimensions of the guide 7 in the air path structure of the outdoor unit 50 of the vehicle air conditioner according to Embodiment 1 of the present invention. Volume of air as the width L _G of the guide 7 is large is guided to the heat exchanger 1 is increased. On the other hand, if the width L _G of the guide 7 is too large, many air 14 that has flowed into the air passage 5 collides with the guide 7. Therefore, since the speed of the wind flowing into the heat exchanger 1 near the guide 7 is increased, the wind speed distribution is increased. That is, since the wind speed distribution 15 is not uniform, the ability of the heat exchanger 1 may not be fully utilized. Further, pebbles and dust contained in the wind 14 flowing into the air passage 5 are likely to adhere to the heat exchanger 1, and the heat exchanger 1 may be clogged and the damper 13 may become inoperable. Therefore, generally the width L _G of the guide 7 is most desirable that the height of 1 / 4-3 / 4 of Kazerohaba L. Thereby, pebbles and dust that have flowed into the air passage 5 pass through the gap between the guide 7 and the heat exchanger 1 and are discharged from the air passage outlet 10.

  In addition, about the dimension and position of the guide 7, since an optimal value changes with an air path shape, a dimension, arrangement | positioning of the heat exchanger 1, etc., it should just determine suitably as long as the air path 5 is not obstruct | occluded. Further, the guide 7 is preferably attached with a strong material such as iron or aluminum so that it is not damaged, deformed or scattered by the traveling wind.

  When the vehicle 100 travels in the direction opposite to the travel direction 11, the wind 14 flows into the air path 5 from the air path outlet 10 side. Therefore, it is desirable that the mounting position of the guide 7 is provided so as to face the substantially central portion of the heat exchanger 1. Thereby, it is not necessary to change the position of the guide 7 according to the traveling direction of the vehicle 100.

  As described above, the outdoor unit 50 for a vehicle air conditioner according to Embodiment 1 of the present invention is provided with the guide 7 that closes a part of the air passage 5 at a position facing the heat exchanger 1. A part of the traveling wind of the vehicle 100 that has flowed in collides with the guide 7 and flows into the heat exchanger 1. As a result, the difference in static pressure between the upstream side and the downstream side of the heat exchanger 1 increases, and the traveling wind that has flowed into the air passage 5 easily flows into the heat exchanger 1. Therefore, the wind speed distribution 15 of the wind 14 flowing into the heat exchanger 1 can be made more uniform than before, and the ability of the heat exchanger 1 can be utilized. Further, since pebbles and dust that have flowed into the air passage 5 pass between the heat exchanger 1 and the guide 7 and are discharged from the air passage outlet 10, clogging of the heat exchanger 1 and inoperability of the damper are prevented. Can be suppressed.

  In addition, the outdoor unit 50 of the vehicle air conditioner according to the first embodiment secures the air volume of the wind 14 with the uniform wind speed distribution 15 and is supplied to the heat exchanger 1. 2 can be reduced. Therefore, the fan 2 can be reduced in size, and power consumption, noise, and vibration can be reduced.

  In the first embodiment of the present invention, the fan 2 is arranged on the downstream side of the heat exchanger 1 as shown in FIG. 1, but the fan 2 is heated as shown in FIG. It is good also as a structure arrange | positioned in the upstream of the exchanger 1. FIG. Also in this case, the heat exchanger 1 should just be provided along the air path 5. FIG.

  In Embodiment 1 of the present invention, the inclined wall surface 4, the air passage 5, and the air passage wall 6 are formed on the side surface of the vehicle, but the positions where the air passage 5 and the exhaust port 8 are formed are as follows: Even if the air conditioner is formed on the vehicle floor (not shown) due to restrictions on the mounting position of the indoor unit and the vehicle structure (for example, when the vehicle member is arranged on the vehicle side), Good. For example, as shown in FIG. 6, the air passage 5 may be formed on the vehicle floor and the exhaust port 8 may be formed on the vehicle side wall 3.

Embodiment 2. FIG.
FIG. 7 is a cross-sectional view showing the air path structure of the outdoor unit 50 of the vehicle air conditioner according to Embodiment 2 of the present invention. In the second embodiment, differences from the first embodiment will be mainly described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

  In the first embodiment, the guides 7 are arranged at one place in the air passage 5, but in the second embodiment, the guides 7 are arranged at a plurality of places along the air circulation direction. More specifically, the wind 14 introduced into the air passage 5 extends upstream, midstream, and downstream in the air passage 5 (in FIG. 7, the heat exchange is performed on the airflow wall 6 side on the upstream side and on the midstream side. Each of them collides with a plurality of guides 7 arranged on the air channel wall 6 side on the vessel 1 side and downstream side, and flows in the air channel 5 while meandering. At this time, the wind 14 is distributed by the guides 7 and guided to the heat exchanger 1. The wind speed distribution 15 indicates the speed distribution of the wind 14 in the air path 5.

  As described above, the outdoor unit 50 of the vehicle air conditioner according to Embodiment 2 of the present invention has a configuration in which the guides 7 are arranged on the upstream side, the center side, and the downstream side in the air passage 5, respectively. Thereby, as compared with the configuration of the first embodiment (the configuration in which only one guide 7 is provided in the air passage 5), the portion where the speed of the wind flowing into the heat exchanger 1 is increased is the plurality of guides 7. Therefore, the wind speed distribution 15 flowing into the heat exchanger 1 becomes more uniform as a whole. Therefore, the ability of the heat exchanger 1 can be further utilized. Further, since the pebbles and dust that have flowed into the air passage 5 pass between the heat exchanger 1 and the guide 7 and are discharged from the air passage outlet 10, the heat exchanger 1 is clogged and the damper is inoperable. Can be suppressed.

  Further, in the outdoor unit 50 for a vehicle air conditioner according to Embodiment 2 of the present invention, the air volume of the wind 14 with a uniform wind speed distribution 15 is ensured and supplied to the heat exchanger 1. Is no longer required to operate. Therefore, the fan 2 can be reduced in size, and power consumption, noise, and vibration can be reduced.

  In the second embodiment of the present invention, as shown in FIG. 7, an example is shown in which the guide 7 is formed so as to be in contact with the air passage wall 6 and the heat exchanger 1 (housing). The arrangement of the guide 7 may be appropriately determined as long as the amount of air guided to the heat exchanger 1 is large and the wind speed distribution 15 is small. For example, as illustrated in FIG. 8, the guide 7 may be fixedly supported by a separate method by using a structure that does not contact the air passage wall 6 or the heat exchanger 1.

  Moreover, in Embodiment 2 of this invention, although the heat exchanger 1 was arrange | positioned linearly, what is necessary is just the arrangement | positioning along the air path 5. FIG. For example, if the heat exchanger 1 is bent (heat exchangers 1a and 1b) as shown in FIG. 9, the heat exchange area of the heat exchanger facing the air passage 5 can be increased, and the wind 14 Since it becomes easy to enter the heat exchangers 1a and 1b, the heat exchange efficiency can be improved. Moreover, if it is set as the bending structure of the heat exchangers 1a and 1b, the heat exchanger required in order to ensure the same heat exchange area as the case where the heat exchanger 1 is linearly provided in the air path 5 is arrange | positioned. Since the space is small, the outdoor unit 50 can be made compact. In the first embodiment, the heat exchanger 1 may be bent.

  Further, in Embodiment 2 of the present invention, three guides 7 are arranged in the upstream, middle stream, and downstream in the air passage 5, but two guides 7 are arranged in the air passage 5. Alternatively, four or more guides 7 may be arranged in the air passage 5.

Embodiment 3 FIG.
FIG. 10 is a cross-sectional view showing the air path structure of the outdoor unit 50 of the vehicle air conditioner according to Embodiment 3 of the present invention. In the third embodiment, differences from the first and second embodiments will be mainly described, and the same parts as those in the first and second embodiments will be denoted by the same reference numerals and the description thereof will be omitted. It shall be.

  In the third embodiment, as shown in FIG. 10, the inclined portion 16 is inclined toward the heat exchanger 1 side from the upstream side to the downstream side in the air flow direction. In the third embodiment, it is assumed that the vehicle travels not only in the traveling direction 11 but also in the direction opposite to the traveling direction 11. For this reason, the guide 7 according to the third embodiment includes an inclined portion 16 that inclines toward the heat exchanger 1 from the upstream side to the downstream side in the air flow direction when the vehicle 100 travels in the traveling direction 11; When the vehicle 100 travels in a direction opposite to the travel direction 11, it is formed in a substantially mountain shape in plan view by an inclined portion 16 that inclines toward the heat exchanger 1 from the upstream side to the downstream side in the air flow direction. . The guide 7 has the inclined portion 16 when the guide 7 has a substantially flat plate shape as in the first and second embodiments of the present invention, the speed of the wind 14 flowing into the heat exchanger 1 is the guide 7. This is to avoid a tendency to locally increase at the position where the is placed.

  When the vehicle 100 travels in the arrow direction of the travel direction 11, the wind 14 flows into the air path 5 from the air path inlet 9 side. When the vehicle 100 travels in the direction opposite to the travel direction 11, the wind 14 flows into the air path 5 from the air path outlet 10 side. Therefore, it is desirable that the end portion of the guide 7 on the side of the heat exchanger 1 is provided so as to face the substantially central portion of the heat exchanger 1. Thereby, it is not necessary to change the position of the guide 7 according to the traveling direction of the vehicle 100.

  As described above, the outdoor unit 50 for a vehicle air conditioner according to Embodiment 3 of the present invention is configured to have the inclined portion 16 on the heat exchanger 1 side of the guide 7. Thereby, since the width of the air passage 5 is gradually narrowed with respect to the flow direction of the wind 14 in the air passage 5, the air speed to the heat exchanger 1 is gradually increased, and the capability of the heat exchanger 1 is further increased. You can make use of it. Further, since pebbles and dust that have flowed into the air passage 5 pass between the heat exchanger 1 and the guide 7 and are discharged from the air passage outlet 10, clogging of the heat exchanger 1 and inoperability of the damper are prevented. Can be suppressed. The guide 7 needs to be attached with a strong material such as iron or aluminum so as not to be damaged, deformed or scattered by the traveling wind.

  Further, the outdoor unit 50 of the vehicle air conditioner according to the third embodiment secures the air volume of the wind 14 with the uniform wind speed distribution 15 and supplies it to the heat exchanger 1, so that the fan 2 is operated. There is no need to let them. Therefore, the fan 2 can be reduced in size, and power consumption, noise, and vibration can be reduced.

  As in the first embodiment, the air passage 5 and the exhaust port 8 may be appropriately formed at positions where the vehicle floor surface and the like can be formed in addition to the vehicle side wall 3.

  When the vehicle 100 travels in the direction opposite to the travel direction 11, the wind 14 flows into the air path 5 from the air path outlet 10 side. Therefore, it is desirable that the end portion of the guide 7 on the heat exchanger side is provided so as to face the substantially central portion of the heat exchanger 1. This eliminates the need to change the shape of the end portion of the guide 7 on the heat exchanger side according to the traveling direction of the vehicle 100.

  Further, as described above, depending on the traveling direction of the vehicle 100, the wind 14 flows into the air path 5 from the air path inlet 9 side, and the wind 14 flows into the air path 5 from the air path outlet 10 side. There is a case to do. Therefore, even if the wind 14 flows from any side, the guide 7 is set as shown in FIG. 10 so as to suppress the local increase in the speed of the wind 14 flowing into the heat exchanger 1 (guide). 7 is formed by forming the inclined portion 16 so as to have a mountain shape, but is not limited thereto. For example, when the traveling direction of the vehicle 100 is only the arrow direction of the traveling direction 11 or the opposite direction of the traveling direction 11, only the direction from the upstream side to the downstream side of the air flow direction is the heat exchanger 1 side. It suffices to provide an inclined portion 16 that inclines in the direction.

  Moreover, although the inclination part 16 was set as the structure inclined linearly, it is not limited to this. For example, the inclined portion 16 can be appropriately employed, for example, inclined in a stepped shape or a curved shape.

FIG. 11 is a cross-sectional view showing an air path structure of the outdoor unit 50 of the vehicle air conditioner according to Embodiment 3 of the present invention, and the inclination angle of the guide 7 and the width of the guide 7 in FIG. 10 will be described. FIG. Air volume width L _G of the guide 7 is guided more to the heat exchanger 1 large increases, if the width L _G of the guide 7 is too large, a large distribution of velocity of wind 14 passing through the heat exchanger 1 is produced, heat The capacity of the exchanger 1 cannot be fully utilized. Furthermore, there is a problem that the pebbles and dust contained in the wind flowing into the air passage are all attached to the heat exchanger and the heat exchanger 1 is clogged. Therefore, generally the width _{L G} of the guide 7 is most preferably 1 / 4-3 / 4 of the height Kazerohaba L.

  The angle θ of the angle of the mountain-shaped guide 7 varies depending on the size of the air passage 5 and the width of the heat exchanger 1, but θ is preferably about 15 to 45 degrees, and the air passage 5 is blocked. As long as there is no, it is determined appropriately.

  Further, as shown in FIG. 12, the heat exchanger 1 may be bent (heat exchangers 1a and 1b). If comprised in this way, since the heat exchange area of the heat exchanger which faces the air path 5 can be enlarged, and the wind 14 becomes easy to enter into a heat exchanger, the improvement of heat exchange efficiency can be aimed at. Further, if the heat exchangers 1a and 1b are bent, there is a space for arranging the heat exchanger necessary to secure the same area as when the heat exchanger 1 is linearly provided in the air passage 5. Since it can be small, the outdoor unit 50 can be made compact.

Embodiment 4 FIG.
FIG. 13 is a cross-sectional view showing an air path structure of outdoor unit 50 of the vehicle air conditioner in the fourth embodiment. In the fourth embodiment, differences from the first to third embodiments will be mainly described, and the same parts as those in the first to third embodiments will be denoted by the same reference numerals and the description thereof will be omitted.

  In the first to third embodiments, the guide 7 is fixed to the heat exchanger 1 or the air passage wall 6, but in the fourth embodiment, the guide 7 is configured by a substantially flat plate that can rotate. The optimum shape and the optimum position of the guide 7 vary depending on the vehicle speed or the wind speed in the wind path 5. Therefore, the guide 7 is rotated by a controller (not shown) by changing the vehicle speed or the wind speed in the wind path 5 to change the angle α, and the air volume and the wind speed distribution 15 to the heat exchanger 1 are optimized.

  The optimum value of the angle α of the guide 7 varies depending on the size of the air passage 5 and the width of the heat exchanger 1. For example, when the wind speed in the air passage 5 is slow, the angle α of the guide 7 is set to nearly 90 degrees. On the other hand, when the wind speed is high, the angle α of the guide 7 is set to 15 to 45 degrees.

  Further, when the vehicle 100 travels in the opposite direction, the angle of the guide 7 is set so that the front end side of the slope faces the air passage inlet 9 side. At this time, for example, the traveling direction of the vehicle 100 is detected by a wind pressure sensor (not shown), and the angle of the guide 7 is controlled according to the detected value.

  When the vehicle 100 travels in the arrow direction of the travel direction 11, the wind 14 flows into the air path 5 from the air path inlet 9 side. When the vehicle 100 travels in the direction opposite to the travel direction 11, the wind 14 flows into the air path 5 from the air path outlet 10 side. Therefore, it is desirable that the mounting position of the guide 7 is provided so as to face the substantially central portion of the heat exchanger 1. Thereby, it is not necessary to change the position of the guide 7 according to the traveling direction of the vehicle 100.

  As described above, the outdoor unit 50 for a vehicle air conditioner according to Embodiment 4 of the present invention can be rotated about the fixed location by fixing one end of the guide 7 to the air passage wall 6. Configured. Thereby, since the air volume and the wind speed distribution 15 to the heat exchanger 1 can be optimized, the capability of the heat exchanger 1 can be further utilized. Further, since pebbles and dust that have flowed into the air passage 5 pass between the heat exchanger 1 and the guide 7 and are discharged from the air passage outlet 10, clogging of the heat exchanger 1 and inoperability of the damper are prevented. Can be suppressed.

  Further, in the outdoor unit 50 for a vehicle air conditioner according to Embodiment 4 of the present invention, since the air volume of the wind 14 with the uniform wind speed distribution 15 is secured and supplied to the heat exchanger 1, the fan 2 Is no longer required to operate. Therefore, the fan 2 can be reduced in size, and power consumption, noise, and vibration can be reduced.

  A plurality of guides 7 may be provided, and the angle of each guide 7 may be controlled by a controller (not shown) according to changes in the vehicle speed and the wind speed in the air passage 5. If comprised in this way, since the wind speed distribution 15 can be made more uniform similarly to Embodiment 2, the capability of the heat exchanger 1 can be improved further.

  Further, similarly to the first embodiment, the air passage inlet 9, the air passage outlet 10, the exhaust port 8, and the like may be appropriately formed at positions where the vehicle floor surface and the like can be formed in addition to the vehicle side wall 3.

Also, as in the first embodiment, it is desirable to generally comprise a width L _G of the guide 7 at 1 / 4-3 / 4 of the height of the air passage width L.

  1, 1a, 1b Heat exchanger, 2 fan, 3 vehicle side wall, 4 inclined wall surface, 5 air channel, 6 air channel wall, 7 guide, 8 exhaust port, 9 air channel inlet 10 air channel outlet, 11 travel direction, 12 Driving wind, 13 damper, 14 wind, 15 wind speed distribution, 16 slope, 17 suction port, 20 housing, 50 outdoor unit, 100 vehicle.

Claims (5)

An outdoor unit of an air conditioner for a railway vehicle that is mounted on a railway vehicle including an air passage formed by an air passage wall along a side surface, a top surface, or a bottom surface,
A housing formed with a suction port communicating with the air passage in a direction crossing a flow direction of the wind in the air passage during travel of the vehicle;
A heat exchanger housed in the housing and disposed along the air path;
At least one guide provided in the air path opposite to the heat exchanger and closing a part of the air path,
The guide is formed symmetrically with a center line of the heat exchanger extending in a direction orthogonal to the traveling direction of the vehicle as a symmetry axis, and the traveling direction of the vehicle on the heat exchanger side of the air passage wall. A plurality of outdoor units for an air conditioner for a railway vehicle , wherein a plurality of outdoor units are provided along an air flow direction in the air passage .   An outdoor unit of an air conditioner for a railway vehicle that is mounted on a railway vehicle including an air passage formed by an air passage wall along a side surface, a top surface, or a bottom surface,
  A housing formed with a suction port communicating with the air passage in a direction crossing a flow direction of the wind in the air passage during travel of the vehicle;
  A heat exchanger housed in the housing and disposed along the air path;
  At least one guide provided in the air path opposite to the heat exchanger and closing a part of the air path,
  The guide is formed symmetrically with a center line of the heat exchanger extending in a direction orthogonal to the traveling direction of the vehicle as a symmetry axis, and the traveling direction of the vehicle on the heat exchanger side of the air passage wall. Extending in a direction perpendicular to the air passage wall and fixed to the air passage wall in a direction perpendicular to the air passage wall.
  An outdoor unit of an air conditioner for a railway vehicle. The outdoor unit of an air conditioner for a railway vehicle according to claim 2 , wherein the guide is provided such that an end portion on the heat exchanger side faces a substantially central portion of the heat exchanger. . The outdoor unit of an air conditioner for a railway vehicle according to any one of claims 1 to 3, wherein the guide is formed in a flat plate shape. The outdoor unit as described in any one of Claims 1-4 is provided. The air conditioner for rail vehicles characterized by the above-mentioned.

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