JP2010069919A - Railroad vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To standardize system composition apparatus such as a heat exchanger and heating apparatus, to reduce the number of times of maintenance work, and to obtain a sufficient noise preventive effect. <P>SOLUTION: When passing thorough a circulating refrigerant heat exchanger 8, cooling water and cooling oil increased in temperature after finishing cooling action to a power conversion device 2 and a main transformer 3 is heat-exchanged with cooling air sent from an evaporator 11 side, and sent to the power conversion device 2 and the main transformer 3 again after being sufficiently cooled. At that time, the temperature of the cooling air sent out to the circulating refrigerant heat exchanger 8 side by rotations of a fan 15 can be kept at a predetermined temperature set in advance regardless of the external temperature of a vehicle 1. Therefore, regardless of weather environment in a local area in which the vehicle 1 is operated, a heat-exchanging function of the circulating refrigerant heat exchanger 8 can be kept at a fixed level. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a railway vehicle equipped with a heat exchange system.

  For railway vehicles such as AC electric vehicles that run on the basis of AC power from overhead wires, DC electric vehicles that run on the basis of DC power from overhead wires, or diesel vehicles that run on diesel engines, what is the power conversion efficiency or engine conversion efficiency? Even if it is improved to 100%, it cannot be made 100%, so there is a heat generating device that always generates heat loss, and the temperature rises severely due to this heat loss. And conventionally, various configurations or measures for suppressing the temperature rise of the heat generating device have been implemented or proposed.

  For example, in a recent AC electric vehicle that employs a converter / inverter system, water is used to cool the semiconductor elements of the power converter, or oil that serves the purpose of insulation is used to cool the main transformer. The temperature rise of the equipment is suppressed.

  Such a coolant such as cooling water or cooling oil rises in temperature while circulating in the refrigerant flow path, but if the temperature rises too much, it can no longer function as a refrigerant. It is necessary to provide a heat exchanger in the middle of the refrigerant flow path to efficiently cool the refrigerant. A heat exchange system that has been widely used in the past attempts to forcibly cool the refrigerant by taking outside air with a blower mounted on a vehicle and bringing the taken outside air into contact with the heat exchanger as cooling air. (For example, refer to Patent Document 1).

  FIG. 5 is an explanatory diagram of such a conventional system. A power converter 52 (heat generating device) is mounted in the machine room of the vehicle 51 (electric locomotive), and a circulating refrigerant flow path 53 passes through the power converter 52. The refrigerant flowing through the circulation refrigerant channel 53 is, for example, cooling water, and this cooling water is circulated by a water pump (not shown) provided in the power conversion device 52. The heat exchange part of the circulation refrigerant flow path 53 is disposed in a cooling device 54 having a fan 55.

  A blower 56 and an air compressor device 57 are also mounted in the machine room of the vehicle 51. The blower 56 is for cooling the main motor 58 (heat generating device) that drives the wheels 59, and the air compressor device 57 is for supplying air used for the air brake device of the train.

  Next, the operation of FIG. 5 will be described. When the vehicle 51 is driven, the internal temperature of the power conversion device 52 gradually increases due to the heat generating action of the heating elements, but the temperature rise at this time is suppressed by the cooling action of the cooling water flowing through the circulating refrigerant flow path 53. The

  The cooling water that has finished the cooling action moves to the heat exchanging portion disposed in the cooling device 54, but the temperature of the air has risen because the outside air introduced from the louver 60 is taken into the heat exchanging portion by the rotation of the fan 55. The cooling water is cooled by the introduced outside air.

Further, due to the rotation of the blower 56, the introduced outside air is taken in from the louver 61, and the cooling air is sent to the main motor 58. The air compressor device 57 sucks air in the machine room as cooling air for the air compressor and exhausts the air into the machine room. In addition, since the machine room is pressurized by the rotation of the blower 56 at this time, the pressurized exhaust is sent out of the vehicle 51.
WO 2007/031245 A1 International Publication

  As described above, the conventional system of FIG. 5 performs cooling by bringing the outside air taken in from the louvers 60 and 61 into direct contact with the heat exchanging unit in the cooling device 54, the main motor 58, and the like. Therefore, there is no particular problem if the outside air temperature is below a certain level, but sufficient cooling is no longer possible when the outside temperature reaches a certain high temperature. In addition, when the operation area of the vehicle 51 is a high altitude, the air density becomes small, so that sufficient cooling is impossible. That is, in the conventional system that uses the introduced outside air to cool directly, the cooling efficiency is greatly influenced by the weather environment outside the vehicle.

  Therefore, in the railway vehicle according to the conventional system, in order to be able to cope with various external weather environments, a plurality of types of specifications of the heat exchange device such as a cooling device are prepared, and a heating device such as a power conversion device or a main transformer is prepared. However, multiple types of specifications had to be prepared, and standardization of system components could not be achieved. Such a configuration requiring a plurality of types of specifications inevitably increases the cost of the entire system, and causes inconveniences such as delays in product delivery and design changes.

  Further, in the case of a system in which the air from the outside of the vehicle is brought into direct contact with the heat exchanging portion in the cooling device 54, the heat exchanging portion in the cooling device 54 is contaminated by dust contained in the air, and sufficient heat exchange is performed. If it becomes impossible, there is a risk that a failure may occur in the equipment in the vehicle, and in order to prevent the occurrence of such a failure, a maintenance work such as cleaning must be frequently performed.

  Furthermore, in the case of a diesel vehicle, if intake / exhaust is performed between the outside of the vehicle and the vehicle interior, and the vehicle interior is actively ventilated, the ventilation port (intake / exhaust port) must be increased. There was also a problem that noise countermeasures became difficult because the diesel engine sound leaked from the mouth.

  The present invention has been made in view of the above circumstances and enables standardization of system components such as a heat exchange device and a heat generating device. Further, the number of maintenance operations can be reduced, and a sufficient noise prevention effect can be obtained. The object is to provide a heat exchange system for railway vehicle equipment.

  As means for solving the above-mentioned problems, the invention according to claim 1 is provided in the circulating refrigerant flow path passing through the heat generating device mounted on the vehicle, and heat for circulating refrigerant for causing the circulating refrigerant to exchange heat. A circulating air flow path formed so as to pass through the exchanger and the circulating refrigerant heat exchanger and to be disconnected from the outside, and sends circulating air at a predetermined temperature to the circulating refrigerant heat exchanger Thus, a heat exchange system including an air conditioner for maintaining a heat exchange function for maintaining a heat exchange function of the heat exchanger for circulating refrigerant at a certain level is provided.

  According to a second aspect of the present invention, in the first aspect of the present invention, the circulating air is air having a higher specific gravity than the outside air, which is filled in the circulating air flow path in advance. .

  According to a third aspect of the present invention, in the first aspect of the invention, the heat exchange function maintaining air conditioner can send out either cold air based on a cooling function or warm air based on a heating function. It is characterized by being.

  According to a fourth aspect of the present invention, in the first aspect of the invention, the heat exchange function maintaining air conditioner includes two heat exchangers, a condenser and an evaporator, and one of the heat exchangers is the circulating air. It is attached in the flow path, and the other heat exchanger is attached in duct piping connected with the vehicle exterior.

  The invention according to claim 5 is the invention according to claim 1, wherein the heat generating device is disposed in a sealed container, and a branched flow path branched from the circulation air flow path is connected to the sealed container, A part of the air at a predetermined temperature from the heat exchange function holding air conditioner can be sent into the sealed container.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, an air flow path side opening / closing valve and a branch flow path side opening / closing valve are provided in the vicinity of each branch location of the circulation air flow path and the branch flow path, Further, the on-off valve control means for performing the on-off control of the on-off valve based on the detection of the temperature of the heat generating device or the detection of the temperature in the sealed container is provided.

  According to a seventh aspect of the present invention, in the first aspect of the present invention, an air discharge duct and an indoor air suction duct are connected to the circulation air flow path, and a predetermined temperature from the heat exchange function holding air conditioner is set. A part of the air is released into the vehicle interior, and the indoor air is taken in from the indoor air intake duct and sent to the heat exchange function holding air conditioner, so that the vehicle can be air-conditioned in the vehicle. It is characterized by that.

  The invention according to claim 8 is the invention according to claim 3, wherein the heat exchange function maintaining air conditioner has an air heater provided in the vicinity of the outside air inlet, and the warm air based on the heating function is generated. At the time of delivery, the air preheated by the air heater is introduced.

  According to a ninth aspect of the present invention, in the first aspect of the present invention, an outside air introduction passage and a cooling outside air discharge passage separated from the circulating air passage are installed, and the heat exchange function holding air conditioner is The air conditioner for maintaining heat exchange function is replaced by sending the circulating air to the heat exchanger for circulating refrigerant via the circulating air flow path by switching the flow path switching means. The outside air taken in from the outside air introduction flow path can be discharged into the vehicle compartment through the cooling outside air discharge flow path.

  According to the present invention, it is possible to standardize heat exchange devices and system components such as heat generating devices, and further reduce the number of maintenance operations and obtain a sufficient noise prevention effect.

  FIG. 1 is an explanatory diagram of a first embodiment of the present invention. In the present embodiment, a case where the railway vehicle is an AC electric vehicle will be described.

  A power converter 2 (which supplies power to the drive motor) and a main transformer device 3 (steps down the AC voltage from the overhead line), which are heat generating devices, are mounted in the vehicle 1. A circulating refrigerant flow path 5 passes through the power conversion device 2, and the cooling water flowing through the circulating refrigerant flow path 5 is circulated by the water pump 4. Similarly, the circulating refrigerant flow path 7 passes through the main transformer device 3, and the cooling oil flowing through the circulating refrigerant flow path 7 is circulated by the oil pump 6.

  A circulation refrigerant heat exchanger 8 configured by the heat exchange portions of the circulation refrigerant flow paths 5 and 7 is disposed in the middle of the circulation air flow path 9. A heat exchange function holding air conditioner 10 is disposed at a position facing the circulating refrigerant heat exchanger 8.

  The heat exchange function maintaining air conditioner 10 includes an evaporator 11, a condenser 12, a refrigerant flow path 13, a compressor 14, and fans 15 and 16. An evaporator 11 and a fan 15 are attached in the middle of the circulating air flow path 9. Further, a duct pipe 19 is provided between an outside air inlet 17 formed in the roof portion of the vehicle 1 and an exhaust outlet 18 formed in the lower part of the floor. And a fan 16 is attached.

  In the present embodiment, the circulation air flow path 9 is in a state of being completely blocked from the external space such as the interior of the vehicle 1 and the exterior of the vehicle 1. Accordingly, the flow path can be preliminarily filled with air having a greater specific gravity than the outside air as necessary. For example, if the circulating air flow path 9 is not completely cut off from the external space and the operation area of the vehicle 1 is highland, the flow path is filled with air having the same specific gravity as the outside air. There is a possibility that the heat exchange function of the circulating refrigerant heat exchanger 8 may be greatly reduced. However, as described above, if the air having a higher specific gravity than the outside air and good heat exchange efficiency is filled in a completely sealed state, the heat exchange function of the circulating refrigerant heat exchanger 8 can be maintained at a certain level. become able to.

  Next, the operation of FIG. 1 will be described. When the vehicle 1 starts running, the power conversion device 2 and the main transformer device 3 generate heat. However, since the cooling water and the cooling oil flow through the circulating refrigerant flow paths 5 and 7 by starting the water pump 4 and the oil pump 6, The temperature rise of these heat generating devices is suppressed.

  Further, while the vehicle 1 is traveling, the heat exchange function holding air conditioner 10 operates. That is, when the compressor 14 is started, in the condenser 12, the high-temperature and high-pressure refrigerant is cooled by the outside air introduced from the outside air introduction port 17 by the rotation of the fan 16. On the other hand, in the evaporator 11, the ambient temperature in the vicinity decreases due to the vaporization of the low-temperature and low-pressure refrigerant, so that the cooling air is sent out toward the circulating refrigerant heat exchanger 8 by the rotation of the fan 15.

  Therefore, the cooling water and the cooling oil that have finished the cooling operation for the power conversion device 2 and the main transformer device 3 and have risen in temperature are sent from the evaporator 11 side when passing through the circulating refrigerant heat exchanger 8. Since the heat is exchanged by the wind, it is sent to the power conversion device 2 and the main transformer device 3 again after being sufficiently cooled.

  At this time, the temperature of the cooling air sent to the circulating refrigerant heat exchanger 8 side by the rotation of the fan 15 can be maintained at a predetermined temperature set in advance regardless of the external temperature of the vehicle 1. Furthermore, the cooling air has a specific gravity greater than that of the outside air and has a good heat exchange efficiency. Therefore, regardless of the local weather environment in which the vehicle 1 operates, the heat exchange function of the circulating refrigerant heat exchanger 8 can be maintained at a certain level. Therefore, although the heat exchange function maintaining air conditioner 10 is required to have a capability according to the local weather environment, the heat exchanger 8 such as the power conversion device 2 and the main transformer device 3 and the heat exchanger 8 for the circulating refrigerant are used. The specification of can be standardized.

  The above-described first embodiment of FIG. 1 broadly encompasses the following aspects.

(1) The heat exchange function holding air conditioner 10 can send not only cold air based on the cooling function but also warm air based on the heating function into the circulating air flow path 9.
That is, in cold districts or the like, it is required to use the heat exchange function maintaining air conditioner 10 as a heater at the start of traveling of the vehicle 1 and send warm air to the circulating refrigerant heat exchanger 8. In this case, if the evaporator 11 and the condenser 12 are switched by switching a four-way valve (not shown in FIG. 1), the vehicle 1 can be started smoothly.
Then, when a certain amount of time has elapsed since the start of vehicle travel, the temperature of the cooling water and the cooling oil in the circulating refrigerant flow paths 5 and 7 rises above a certain level. May be switched to the air conditioner again so that cold air is sent to the heat exchanger 8 for circulating refrigerant.
When the heat exchange function holding air conditioner 10 is used as a heater, an air heater is attached in the vicinity of the outside air introduction port 17 so that the air heater is energized when the vehicle starts running. Can be demonstrated quickly.
(2) In the configuration of FIG. 1, the number of installed heat exchange function maintaining air conditioners 10 is one, but it is also possible to adopt a configuration in which two units, a cooling only machine and a heating only machine, are installed ( In that case, heat exchangers of two dedicated machines are attached in parallel, and the flow path switching in the circulating air flow path 9 and the duct pipe 19 is performed by appropriate switching means or on-off valves. Alternatively, when it is clear that the vehicle operation area is not a cold region and the heating function at the start of vehicle travel is almost unnecessary, it is possible to use only one cooling-only machine.
(3) Although the configuration of FIG. 1 is described in the case where the vehicle 1 is an AC electric vehicle, the configuration of the present embodiment can also be applied to the case where the vehicle 1 is a DC electric vehicle or a diesel vehicle. is there. However, in the case of a DC electric vehicle, the main transformer device 3 (and the oil pump 6 and the circulating refrigerant flow path 7) is unnecessary, and in the case of a diesel vehicle, the main transformer device 3 is replaced with a diesel engine.
(4) The heat exchange function holding air conditioner 10 in FIG. 1 maintains the heat exchange function of the circulating refrigerant heat exchanger 8 at a certain level by sending cooling air through the circulation air flow path 9. Although arranged for the purpose, the vehicle 1 can also be configured to ventilate the room.
For example, an outside air introduction channel separated from the circulating air channel 9 (a part of the duct pipe 19 is branched to guide outside air from the outside air inlet 17 to the evaporator 11) and a cooling outside air discharge channel (evaporation). A flow path for discharging the outside air cooled by the vessel 11 into the interior of the vehicle 1 and a flow for switching between the circulation air flow path 9, the external air introduction flow path, and the cooling external air discharge flow path. A path switching means is provided.
In normal times, as described above, the heat in the circulating refrigerant heat exchanger 8 is maintained at a constant level by sending the air in the circulating air passage 9 toward the circulating refrigerant heat exchanger 8. To do. However, when the heat exchange function of the heat exchanger 8 for the circulating refrigerant is at a sufficiently high level, the flow path switching means connects the flow path communicating with the evaporator 11 and the fan 15 from the circulating air flow path 9 side to the outside air. By switching to the introduction flow path and the cooling outdoor air discharge flow path side, the heat exchange function maintaining air conditioner 10 can be used for the ventilation of the interior of the vehicle 1.

  FIG. 2 is an explanatory diagram showing the main configuration of the second embodiment of the present invention. 2, only the power conversion device 2 (and the water pump 4 and the circulating refrigerant flow path 5) in FIG. 1 is shown for simplification of the drawing, and the main transformer device 3 (and the oil pump 6 and the circulating refrigerant flow path 7 are illustrated). ) Is omitted.

  In FIG. 2, the power conversion device 2 has a sealed container 20, and a semiconductor circuit 21 configured by an IGBT or other switching element, a CPU, and the like are controlled in the sealed container 20. Components such as the semiconductor circuit control device 22 and the reactor 23 are disposed. Among these components, the semiconductor circuit 21 suitable for cooling by the water cooling method is cooled by the cooling water flowing through the circulating refrigerant flow path 5.

  Then, branch flow paths 9 a and 9 b are branched from the position of the circulation air flow path 9 near the circulating refrigerant heat exchanger 8, and these branch flow paths 9 a and 9 b are connected to the sealed container 20. Therefore, the cooling air sent to the circulating air flow path 9 from the heat exchange function holding air conditioner 10 by the rotation of the fan 15 cools the cooling water flowing through the circulating refrigerant heat exchanger 8, but further, the branch flow path After being sent into the sealed container 20 through 9a, the semiconductor circuit 21, the semiconductor circuit control device 22, and the reactor 23 are cooled, and then sent again to the circulating air flow path 9 through the branch flow path 9b.

  In the configuration of FIG. 1, only the circulating refrigerant flow path 5 is the means for cooling the power conversion device 2, so the semiconductor circuit control device 22 and the reactor 23 that do not pass through the circulating refrigerant flow path 5 are not cooled. According to the configuration of FIG. 2, it is possible to cool all the components arranged in the sealed container 20 by branching a part of the air flowing through the circulation air flow path 9.

  In the configuration of FIG. 2, since the sealed container 20 communicates with the circulating air flow path 9 via the branch flow paths 9a and 9b, the internal temperature of the sealed container 20 can be maintained at a constant temperature. The specification of each device arranged in the container 20 can be made the standard design specification.

  Since the circulating air that enters and exits from the circulating air passage 9 via the branch passages 9a and 9b is clean air that does not contain dust or the like, there is a risk of causing damage to each device arranged in the sealed container 20. The maintenance effort will be reduced accordingly.

  FIG. 3 is an explanatory diagram showing the main configuration of the third embodiment of the present invention. This third embodiment can be said to be a modification of the second embodiment.

  In FIG. 3, air flow path side opening / closing valves 24a, 24b and branch flow path side opening / closing valves 25a, 25b are provided in the vicinity of the branch points of the circulation air flow path 9 and the branch flow paths 9a, 9b. And in the airtight container 20 of the power converter 2, the on-off valve control means 26 which performs on-off control of these on-off valves is provided. A detection temperature T1 from a temperature detector 27 attached to the semiconductor circuit 21 and a detection temperature T2 from an ambient temperature detection temperature detector 28 in the sealed container 20 are input to the on-off valve control means 26. The open / close valve control means 26 performs open / close control of the air flow path side open / close valves 24a, 24b and the branch flow path side open / close valves 25a, 25b based on these detected temperatures.

  For example, when the air flow path side opening / closing valves 24a, 24b are opened and the branch flow path side opening / closing valves 25a, 25b are closed, the heat exchange promotion function of the heat exchange function holding air conditioner 10 is the same as in FIG. .

  When all of the air flow path side opening / closing valves 24a, 24b and the branch flow path side opening / closing valves 25a, 25b are opened, the heat exchange promotion function of the heat exchange function holding air conditioner 10 is the same as in FIG.

  Furthermore, when the air flow path side opening / closing valves 24a, 24b are closed and the branch flow path side opening / closing valves 25a, 25b are opened, the heat exchange promoting function of the heat exchange function holding air conditioner 10 is the heat exchanger for circulating refrigerant. 8 does not act, but acts as a cooling action on all the components in the sealed container 20. Therefore, even when the cooling by the circulating refrigerant flow path 5 becomes impossible due to a failure of the water pump 4 or the like, the semiconductor circuit 21 is cooled to some extent by the cooling air from the branch flow paths 9a and 9b. Can be prevented from being damaged by the temperature rise.

  FIG. 4 is an explanatory diagram of the fourth embodiment of the present invention. In the present embodiment, a case where the railway vehicle is a diesel electric locomotive will be described.

  In FIG. 4, a power converter 32 and a diesel engine 33, which are heat generating devices, are mounted in a vehicle 31. The power conversion device 32 and the diesel engine 33 are cooled by each refrigerant in the circulation refrigerant flow paths 34 and 35 passing through the inside thereof.

  A circulation refrigerant heat exchanger 36 constituted by the heat exchange portions of the circulation refrigerant flow paths 34 and 35 is disposed in the middle of the circulation air flow path 37. A heat exchange function holding air conditioner 38 is disposed at a position facing the circulating refrigerant heat exchanger 36.

  The circulation refrigerant heat exchanger 36 is the same as the heat exchange function maintaining air conditioner 10 of FIG. 1, and an evaporator (not shown) is attached in the middle of the circulation air flow path 37. In addition, a duct pipe 41 is provided between the outside air inlet 39 formed in the roof portion of the vehicle 31 and the air outlet 40 formed in the lower part of the floor, and a condenser ( (Not shown) is attached.

  An air discharge duct 42 and an indoor air intake duct 43 are connected to the circulation air flow path 37. The air discharge duct 42 has a plurality of air discharge ports 42a, and a part of air having a predetermined temperature passing through the circulation air flow path 37 is discharged from the air discharge ports 42a into the vehicle compartment. . The indoor air intake duct 43 has an air intake port 43a. The indoor air intake duct 43a draws indoor air from the air intake port 43a and sends it out to the heat exchange function holding air conditioner 10. In the present embodiment, the air discharge duct 42 and the indoor air intake duct 43 are connected to the circulation air flow path 37 in this way, so that the vehicle is partially used by the air from the heat exchange function holding air conditioner 38. 31 indoor air-conditioning can also be performed.

  Next, the operation of FIG. 4 will be described. When the vehicle 31 starts to travel, the power conversion device 32 and the diesel engine 33 generate heat, but due to the action of the refrigerant flowing through the circulation refrigerant flow paths 34 and 35, the temperature rise of these heat generating devices is suppressed. The refrigerant whose temperature has risen after the cooling of the power conversion device 32 and the diesel engine 33 is finished is transferred to the heat exchanger 36 for circulating refrigerant disposed in the circulating air flow path 37. The air is efficiently cooled by air having a predetermined temperature.

  At this time, a part of the air at a predetermined temperature sent from the heat exchange function holding air conditioner 38 to the circulation air flow path 37 is branched into the air discharge duct 42 and discharged into the vehicle 31 from the air discharge port 42a. Is done. Therefore, the room temperature rise in the room is also suppressed. The indoor air is sucked from the air suction port 43a and sent to the heat exchange function holding air conditioner 38, cooled by the evaporator, and then sent again to the circulation air flow path 37 and the air discharge duct 42. The

  In the configuration of FIG. 4, the duct pipe 41 passes through between the outside air inlet 39 and the air outlet 40 of the vehicle 31, but the vehicle interior has a sealed structure that is shut off from the outside. The engine sound can be prevented from leaking to the outside, and the noise prevention effect can be greatly improved.

  Further, in the conventional system shown in FIG. 5, the cooling device 54 directly applies the outside air taken in from the louver 60 to the heat exchanging portion of the circulation refrigerant flow path 53. In such a configuration, the outside air is caused by dust in the outside air. In order to prevent the occurrence of equipment failure, frequent maintenance work is unavoidable, and noise is emitted from the louver 60 to the outside, so that the loud noise of diesel vehicles cannot be reduced sufficiently. . However, in the configuration of FIG. 4, the engine room of the vehicle 31 can be substantially sealed, so that frequent maintenance work is not required.

Explanatory drawing of the 1st Embodiment of this invention. Explanatory drawing which shows the principal part structure of the 2nd Embodiment of this invention. Explanatory drawing which shows the principal part structure of the 3rd Embodiment of this invention. Explanatory drawing of the 4th Embodiment of this invention. Explanatory drawing about a conventional system.

Explanation of symbols

1: Vehicle 2: Power conversion device 3: Main transformer device 4: Water pump 5: Circulating refrigerant channel 6: Oil pump 7: Circulating refrigerant channel 8: Heat exchanger 9 for circulating refrigerant: Circulating air channel 10: Heat exchange function holding air conditioner 11: Evaporator 12: Condenser 13: Refrigerant flow path 14: Compressor 15: Fan 16: Fan 17: Outside air inlet 18: Air outlet 19: Duct pipe 20: Sealed container 21: Semiconductor circuit 22: Semiconductor circuit controller 23: Reactor 9a, 9b: Branch flow path 24a, 24b: Air flow path side opening / closing valve 25a, 25b: Branch flow path side opening / closing valve 26: Open / close valve control means 27: Temperature detector 28: Temperature detector T1: Detected temperature T2: Detected temperature 31: Vehicle 32: Power conversion device 33: Diesel engine 34: Circulating refrigerant channel 35: Circulating refrigerant channel 36: Circulating refrigerant heat exchanger 37: Circulating air channel 38: Heat exchange Function maintenance Air conditioner 39: outside air inlet 40: air outlet 41: duct piping 42: air discharge duct 42a: air discharge port 43: indoor air intake duct 43a: air intake port 51: vehicle 52: power converter 53: circulation Refrigerant flow path 54: Cooling device 55: Fan 56: Blower 57: Air compressor device 58: Main motor 59: Wheel 60: Louver 61: Louver

Claims (9)

A circulating refrigerant heat exchanger provided in the middle of the circulating refrigerant flow path that passes through the heat generating device mounted on the vehicle, and for causing the circulating refrigerant to exchange heat;
By passing through the circulating refrigerant heat exchanger and in the middle of the circulating air flow path formed so as to be cut off from the outside, by sending circulating air at a predetermined temperature to the circulating refrigerant heat exchanger, A heat exchange function holding air conditioner for maintaining the heat exchange function of the heat exchanger for circulating refrigerant at a certain level;
A railway vehicle comprising a heat exchange system including The circulating air is air having a larger specific gravity than the outside air, which is filled in the circulating air flow path in advance.
The railway vehicle according to claim 1. The heat exchange function holding air conditioner is capable of sending out either cold air based on a cooling function or warm air based on a heating function.
The railway vehicle according to claim 1. The heat exchange function maintaining air conditioner has two heat exchangers, a condenser and an evaporator, and one heat exchanger is mounted in the circulating air flow path, and the other heat exchanger is located outside the vehicle. Installed in duct piping communicating with
The railway vehicle according to claim 1. The heat generating device is disposed in a sealed container, and a branch flow path branched from the circulation air flow path is connected to the sealed container, and one air of a predetermined temperature from the heat exchange function holding air conditioner is provided. The part can also be sent inside the sealed container.
The railway vehicle according to claim 1. An air flow path side open / close valve and a branch flow path side open / close valve are provided in the vicinity of each branch point of the circulation air flow path and the branch flow path, and the open / close control of the open / close valve is controlled in the sealed container to detect or seal the temperature of the heat generating device. Provided on-off valve control means to perform based on the detection of the temperature in the container,
The railway vehicle according to claim 5. An air discharge duct and an indoor air intake duct are connected to the circulation air flow path, and a part of air at a predetermined temperature from the heat exchange function maintaining air conditioner is discharged into the vehicle interior. By inhaling the air from the indoor air intake duct and sending it to the heat exchange function holding air conditioner, it was also possible for the indoor air conditioning of the vehicle,
The railway vehicle according to claim 1. The air conditioner for holding the heat exchange function has an air heater provided in the vicinity of the outside air introduction port, and introduces air preheated by the air heater when sending warm air based on the heating function. Is,
The railway vehicle according to claim 3. An outside air introduction passage and a cooling outside air discharge passage separated from the circulation air passage are installed, and the heat exchange function holding air conditioner has a passage switching means, and the heat exchange function holding air conditioner By switching the flow path switching means, the apparatus replaces the circulation air to the circulation refrigerant heat exchanger via the circulation air flow path, and replaces the outside air taken in from the outside air introduction flow path with the cooling outside air discharge flow. Can be discharged into the vehicle compartment via the road,
The railway vehicle according to claim 1.

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