JP2016088310A - Outdoor equipment of air conditioner for railway vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide outdoor equipment of an air conditioner for a railway vehicle being high in cooling efficiency, by increasing the cooling air volume, by reducing resistance of exhaust air in an exhaust port.SOLUTION: Outdoor equipment 1 of an air conditioner for a railway vehicle on the present invention comprises an intake port 4 and an exhaust port 3, a heat exchanger 8 for exchanging heat with air sucked in from the intake port 4 and an outdoor blower 7 arranged in an air duct up to the exhaust port 3 from the intake port 4 and discharging from the exhaust port 3 by sending the air to the heat exchanger 8 from the intake port 4. The exhaust port 3 comprises a plurality of exhaust port louvers 5a for arranging the lengthwise direction in parallel to the railway vehicle travel direction. The exhaust port louvers 5a are a shape of expanding in the vertical direction of a flow of exhaust air 13 for advancing in the flow direction of the exhaust air 13 toward the railway vehicle outside from the inside of the outdoor equipment 1 in a cross-sectional shape vertical to the railway vehicle travel direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an outdoor unit of an air conditioner for a railway vehicle.

  A railcar air conditioner is mounted on the roof or under the floor of a railcar, and in particular when mounted on the roof, it is arranged in a form protruding on the roof or embedded in the ceiling. Yes. The railway vehicle air conditioner includes an outdoor unit that takes in air outside the vehicle and exchanges heat with the refrigerant in the outdoor heat exchanger, an indoor unit that takes in air in the vehicle and exchanges heat with the refrigerant in the indoor heat exchanger, Have The outdoor unit has an outdoor unit cover on the vehicle exterior side, and the outdoor unit cover has an intake port that takes in air outside the vehicle and an exhaust port that discharges heat-exchanged air to the outside of the vehicle. A louver is disposed at the opening at the intake port and the exhaust port, and air can be taken in and out while preventing foreign matter from entering the interior of the outdoor unit from the opening. Moreover, it has the outdoor air blower for sending cooling air to a heat exchanger inside the outdoor unit of the air conditioner for rail vehicles.

  During the cooling operation, the outdoor unit of the air conditioner for a railway vehicle blows air taken from the intake port by the outdoor blower to the outdoor heat exchanger as cooling air, exchanges heat, and exhausts the heated air as exhaust air. Are discharged from. In the outdoor unit of an air conditioner for railway vehicles, the pressure loss of the cooling air at the exhaust port becomes high due to the influence of the traveling wind. Then, the proposal which increases the cooling air volume of the outdoor unit of an air conditioner by changing the exhaust port arrangement | positioning of an outdoor unit of an air conditioner and an exhaust port periphery shape is made.

  For example, as an outdoor unit of an air conditioner for a railway vehicle, an "outside section of the outer periphery of the exhaust port has a rounded cross section and has an exhaust port protruding from the surface of the vehicle body" has been proposed (for example, , See Patent Document 1).

  In addition, there has been proposed a type in which a movable louver is provided at the exhaust port, and the position of the louver is varied in accordance with the traveling direction of the vehicle (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 11-321644 (page 2-4, FIG. 2) JP-A-60-161215 (page 3, FIG. 7)

  Railway vehicles that are traveling at high speeds have an increased pressure loss of the exhaust air at the exhaust port of the outdoor unit of the rail vehicle air conditioner due to the influence of the traveling wind, the cooling air volume of the outdoor unit decreases, and the air conditioning for the rail vehicle. The cooling efficiency of the device is reduced. Therefore, in the railway vehicle air conditioner proposed in Patent Document 1, the end cross-sectional shape of the outer periphery of the edge of the exhaust port is rounded, and the exhaust port protrudes from the vehicle surface. However, since the exhaust port protrudes from the surface of the vehicle, there is a problem that it becomes a noise generation source.

  In the outdoor unit of a railway vehicle air conditioner proposed in Patent Document 2, a movable louver is arranged at the exhaust port to prevent a vortex from being generated due to wind passing over the exhaust port and to flow backward to the exhaust. Air can be prevented from flowing through the exhaust gas smoothly. However, since this movable louver protrudes from the vehicle surface, there is a problem that it becomes a noise generation source.

  The present invention has been made in order to solve the above-described problems. By reducing the pressure loss of exhaust air without increasing noise, the amount of cooling air is increased and the cooling efficiency is high. It aims at providing the outdoor unit of an air conditioning apparatus.

  An outdoor unit of an air conditioner for a railway vehicle according to the present invention includes an intake port and an exhaust port, a blower that takes in air outside the railway vehicle from the intake port, and discharges the air from the exhaust port to the outside of the railway vehicle, and the intake port A heat exchanger that exchanges heat with the air outside the railway vehicle taken in from, and the exhaust port includes a plurality of exhaust port louvers arranged in parallel with the traveling direction of the rail vehicle, and the exhaust The mouth louver has a shape in which a cross-sectional shape perpendicular to the traveling direction of the railway vehicle expands in a direction perpendicular to the flow of the exhaust air as the exhaust air flows to the outside of the railway vehicle.

  According to the outdoor unit of an air conditioner for a railway vehicle according to the present invention, the cross-sectional shape of the exhaust louver is made to have a shape with less resistance to the exhaust air, suppressing a decrease in the flow velocity of the exhaust air, and reducing the amount of cooling air even during traveling. The decrease can be suppressed. Thereby, the outdoor unit of the air conditioning apparatus for railway vehicles having high cooling efficiency without increasing noise can be obtained.

It is sectional drawing in alignment with the direction orthogonal to the vehicle running direction of the outdoor unit of the air conditioner for railway vehicles which concerns on Embodiment 1 of this invention. It is a perspective view of the exhaust port of the outdoor unit of the railway vehicle air conditioner according to Embodiment 1 of the present invention. It is a figure showing the cross-sectional shape of the louver of the comparative example. It is a figure showing the cross-sectional shape of the louver which concerns on Embodiment 1 of this invention. It is a figure showing the cross-sectional shape of the louver which concerns on Embodiment 2 of this invention. It is a 1st modification of the cross-sectional shape of the louver which concerns on Embodiment 2 of this invention. It is a 2nd modification of the cross-sectional shape of the louver which concerns on Embodiment 2 of this invention. It is a 3rd modification of the cross-sectional shape of the louver which concerns on Embodiment 2 of this invention. It is sectional drawing of the vehicle running direction of the air conditioning apparatus for railway vehicles which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings, the relationship of the size of each component may be different from the actual one.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view taken along a direction orthogonal to the vehicle traveling direction of the outdoor unit 1 of the railway vehicle air conditioner according to Embodiment 1 of the present invention. The air conditioner for a railway vehicle according to the present embodiment is arranged in a form protruding from the top surface of the vehicle body of the railway car, but may be arranged so as to be embedded in the vehicle ceiling, or the vehicle It may be placed under the floor. Moreover, the railway vehicle air conditioner according to the present embodiment includes an outdoor unit 1 and an indoor unit (not shown). The outdoor unit 1 includes an outdoor unit cover 2 that covers the outside of the vehicle, and the outdoor unit cover 2 is provided with an exhaust port 3 and an intake port 4. The exhaust port 3 is provided on the top surface of the outdoor unit cover 2, and an exhaust port louver 5 a is disposed at the opening of the exhaust port 3 in the vehicle traveling direction. There are a plurality of exhaust port louvers 5a, which are arranged in parallel with each other with a certain gap in the opening to prevent foreign matter from entering the outside of the outdoor unit 1 from the outside of the vehicle and exhaust air from the outdoor unit 1. 13 can pass. The intake port 4 is provided in the outdoor unit cover 2 so as to sandwich the exhaust port 3 in a direction perpendicular to the vehicle traveling direction, and the intake port louver is formed in the opening in a direction orthogonal to the vehicle traveling direction. (Not shown) is arranged. There are a plurality of air inlet louvers, which are arranged in parallel with each other with a certain gap in the opening, preventing foreign matter from entering the interior of the outdoor unit 1 from the outside of the vehicle and allowing air outside the vehicle to pass through. It is like that. Inside the outdoor unit 1, an outdoor blower 7 is disposed along the path from the intake port 4 to the exhaust port 3. The outdoor blower 7 takes in air outside the vehicle from the intake port 4, sends it to the heat exchanger 8 as cooling air 10, and discharges the heated air from the exhaust port 3 as exhaust air 13. In addition, as an advantageous configuration for increasing the cooling air volume of the outdoor unit 1, the exhaust port 3 is provided on the top surface of the outdoor unit cover 2 as in the present embodiment, but the position of the exhaust port 3 and the intake port It is also possible to change the position of 4 and to reverse the blowing direction of the outdoor blower 7. In addition, the air flow of the outdoor unit 1 includes both a mode in which air discharged from the outdoor blower 7 enters the heat exchanger 8 and a mode in which air enters the outdoor blower 7 after passing through the heat exchanger 8. Both of these forms are possible. In any case, the heat exchanger 8 is arranged so as to sandwich the outdoor blower 7, the outdoor blower 7 is rotated to generate an air flow, and air outside the vehicle is sent to the heat exchanger 8. Heat is exchanged with the refrigerant flowing in the heat exchanger 8. Further, when the outdoor unit 1 is embedded in the vehicle body of a railway vehicle, at least one of the exhaust port 3 and the intake port 4 is provided on the surface of the vehicle body, and those other than those arranged on the vehicle body surface are provided on the outdoor unit cover 2. Is also possible.

  FIG. 2 is a perspective view of the exhaust port 3 provided on the top surface of the outdoor unit cover 2. There is an opening portion of the exhaust port 3 on the top surface of the outdoor unit cover 2, and a plurality of exhaust port louvers 5a are arranged in the opening portion of the exhaust port 3 in parallel with the vehicle traveling direction. Further, the exhaust port louver 5 a is disposed so that the louver upper surface 6 is along the same plane as the outdoor unit cover 2. A white arrow shown in FIG. 2 indicates the vehicle traveling wind 12. When the railway vehicle travels at a high speed, the vehicle traveling wind 12 increases in speed, and the resistance of the exhaust wind 13 at the exhaust port 3 increases.

  FIG. 3 is a diagram illustrating a cross-sectional shape of the exhaust louver 50 according to the comparative example perpendicular to the vehicle traveling direction. The exhaust port louver 50 according to the comparative example has a cross-sectional shape in which two apexes adjacent to the long side of the rectangle are rounded, and exhausts the two corners and the sandwiched sides that are not rounded. It is opposed to the upstream direction of the wind 13. That is, the exhaust port louver 50 according to the comparative example has the plane vertically opposed toward the upstream direction of the exhaust air 13. Further, the arrangement of the exhaust louver 50 according to the comparative example is the same as that of the exhaust louver 5a shown in FIGS.

  FIG. 4 is a diagram showing a cross-sectional shape of exhaust port louver 5a according to the present embodiment along a direction orthogonal to the vehicle traveling direction. The cross-sectional shape of the exhaust port louver 5a according to the present embodiment is a semicircular shape, and the exhaust port louver 5a faces the midpoint of the semicircular arc in the upstream direction of the flow of the exhaust air 13. A louver upper surface 6 corresponding to a semicircular string is directed along the surface of the outdoor unit cover 2 from the outdoor unit 1 toward the outside of the vehicle. That is, the exhaust port louver 5a is the same as one of the shapes obtained by dividing the cylinder into two along the central axis of the cylinder, and the cylinder surface is opposed to the exhaust air 13 blown from the inside of the outdoor unit 1. Yes. Since the exhaust air 13 strikes the exhaust port louver 5a and is distributed and flows in two directions along the cylindrical surface, the exhaust resistance is smaller than that of the exhaust port louver 50 of the comparative example shown in FIG. For this reason, with respect to the comparative example, a decrease in the flow velocity of the exhaust air 13 can be suppressed, and an effect of suppressing a decrease in the amount of cooling air can be obtained. Further, since the exhaust louver 5a does not protrude from the outside of the vehicle, noise can be suppressed.

Embodiment 2. FIG.
An outdoor unit of a railway vehicle air conditioner in which the cross-sectional shape of the exhaust louver 5a is changed with respect to the first embodiment will be described.

  FIG. 5 is a view showing a cross-sectional shape of exhaust port louver 5b according to the present embodiment along a direction orthogonal to the vehicle traveling direction. The cross-sectional shape of the exhaust outlet louver 5b in the second embodiment is an equilateral triangle, and one of the apexes of the equilateral triangle is directed to the upstream direction of the exhaust air 13. A louver upper surface 6 corresponding to the opposite side of the apex of the equilateral triangle is directed toward the outside of the railway vehicle and is disposed along the surface of the outdoor unit cover 2. That is, the exhaust port louver 5b is a regular triangular prism, and one of the side ridge lines of the regular triangular prism is opposed to the exhaust air 13 blown from the inside of the outdoor unit 1. Since the exhaust air 13 hits the exhaust port louver 5b and is distributed in two directions along the two sides from the side ridge line of the triangular prism, the exhaust resistance is smaller than that of the exhaust port louver 50 of the comparative example shown in FIG. For this reason, with respect to the comparative example, a decrease in the flow velocity of the exhaust air 13 can be suppressed, and an effect of suppressing a decrease in the amount of cooling air can be obtained. When the air flow analysis is performed with the shape of the exhaust louver 5b according to the present embodiment, the pressure loss can be reduced by about 8% compared to the shape of the exhaust louver 50 according to the comparative example of FIG. done. Further, the exhaust louver 5b according to the present embodiment has no surface on which the exhaust air 13 collides perpendicularly to the exhaust louver 5b, so that the exhaust air louver 5b is compared with the exhaust louver 5a according to the first embodiment. The effect of reducing the noise generated by the above can be obtained.

  6 to 8 show modifications of the exhaust port louver 5b according to the present embodiment. In the present embodiment, the exhaust port louver 5b has a regular triangular cross-sectional shape, but is not limited thereto. For example, the cross-sectional shape of the exhaust louver 5b is an isosceles triangle such as the exhaust louver 5c shown in FIG. 6 (Modification 1), or a triangle such as the exhaust louver 5d shown in FIG. Can be replaced with an arc having two sides sandwiching the vertices thereof (Modification 2), and an exhaust louver 5e shown in FIG. 8 having an arc shape at the apex of the triangle (Modification 3). . That is, if the cross-sectional shape of the exhaust port louver is a shape that spreads in the vertical direction of the flow of the exhaust air 13 as it proceeds from the upstream side of the exhaust air 13 in the flow direction of the exhaust air 13, the comparative example shown in FIG. The effect of making the exhaust resistance smaller than that of the exhaust port louver 50 is obtained. Thereby, the fall of the flow velocity of the exhaust air 13 is suppressed with respect to a comparative example, and the effect that the reduction | decrease in the amount of cooling air is suppressed is acquired.

Embodiment 3.
The configuration of the outdoor unit 1 that reduces the resistance of the exhaust air 13 by changing the arrangement of the exhaust outlet louvers relative to the first and second embodiments will be described. In the present embodiment, the location indicated as the exhaust port louver 5 is, for example, the exhaust air 13 such as the exhaust port louver 5a according to the first embodiment or other modified examples (exhaust port louvers 5b to 5e). In order to reduce the exhaust resistance, the exhaust port louver can be replaced with an advantageous shape.

  FIG. 9 is a view in which the exhaust port 3 is cut in a cross section parallel to the vehicle traveling direction and perpendicular to the ground. A plurality of exhaust port louvers 5 are disposed at the opening of the exhaust port 3, and are disposed at a position lower than the surface of the outdoor unit cover 2 where the exhaust port 3 is opened, inside the outdoor unit 1. That is, there is a step between the outdoor unit cover 2 and the exhaust port louver 5 in the direction recessed in the outdoor unit 1. A hollow arrow along the surface of the outdoor unit cover 2 in FIG. The white arrow from the inside of the exhaust port in FIG. 9 shows the exhaust air 13 of the outdoor unit 1 of the air conditioner.

  By lowering the exhaust port louver 5 below the surface of the outdoor unit cover 2, the vehicle running wind 12 flowing along the outdoor unit cover 2 is separated from the outdoor unit cover 2 when reaching the step of the opening of the exhaust port 3. As a result, the pressure of the air around the opening of the exhaust port 3 decreases. For this reason, the resistance for exhausting the exhaust air 13 is less than when there is no step in the opening. Thereby, the fall of the flow velocity of the exhaust air 13 is suppressed with respect to a comparative example, and the effect that the reduction | decrease in the amount of cooling air is suppressed is acquired. Moreover, since the exhaust port louver 5 is not projected outside the vehicle, noise can be suppressed.

  When the exhaust port louver 5 of the present embodiment was used to form the exhaust port louver 5b of the second embodiment and the air flow analysis was performed, the louver upper surface 6 of the exhaust port louver 50 was disposed along the outdoor unit cover 2. Compared to the case (comparative example), the pressure loss could be reduced by about 10%.

  1 outdoor unit, 2 outdoor unit cover, 3 exhaust port, 4 intake port, 5 (according to Embodiment 3) exhaust port louver, 5a (according to Embodiment 1) exhaust port louver, 5b (according to Embodiment 2) Exhaust louvers, 5c Exhaust louvers, 5d (according to modification 1) Exhaust louvers, 5e (according to modification 2) Exhaust louvers, 6 Louver top surface, 7 Outdoor blower, 8 heat exchanger, 10 cooling air, 12 vehicle running air, 13 exhaust air, 50 (according to comparative example) exhaust louver.

Claims (5)

Intake and exhaust ports;
A blower that takes in air outside the railway vehicle from the intake port and exhausts it from the exhaust port to the outside of the railway vehicle;
A heat exchanger for exchanging heat with air outside the railway vehicle taken in from the intake port,
The exhaust port is
A plurality of exhaust louvers arranged in the longitudinal direction in parallel with the traveling direction of the railway vehicle,
The exhaust louver is
An outdoor unit for an air conditioner for a railway vehicle, wherein the cross-sectional shape perpendicular to the traveling direction of the railway vehicle is a shape that spreads in the vertical direction of the flow of exhaust air as the exhaust air flows to the outside of the railway vehicle. An outdoor unit cover that covers the outside of the railway vehicle
The outdoor unit cover accommodates the blower and the heat exchanger,
The outdoor unit of an air conditioner for a railway vehicle according to claim 1, wherein the intake port and the exhaust port are provided in the outdoor unit cover. The exhaust louver is
The outdoor unit for an air conditioner for a railway vehicle according to claim 1 or 2, wherein a cross-sectional shape perpendicular to the traveling direction of the railway vehicle is a semicircular shape, and the semicircular arc is opposed to a flow of exhaust air. The exhaust louver is
The cross-sectional shape perpendicular to the running direction of the railway vehicle is a triangle, one vertex of the triangle is opposed to the flow of exhaust air, and the opposite side of the vertex is arranged perpendicular to the flow of exhaust air. The outdoor unit of the air conditioning apparatus for railway vehicles as described.   The air conditioner for a railway vehicle according to any one of claims 1 to 4, wherein the exhaust port louver is disposed at a position that is lowered to an upstream side of the exhaust air from a surface where the exhaust port is opened. Outdoor unit.

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