JP2004009900A - Ventilating device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a load of an air conditioner in a vehicle provided with a ventilating device and an air conditioning device. <P>SOLUTION: Heat is exchanged by placing heat pipe heat exchangers 21, 22 in a place where air passes through an air supply fan 3 and its temperature is increases by adiabatic compression, in an air supply side passage, and placing a heat pipe type heat exchanger 23 of the heat pipe heat exchanger 21 in front of a place where exhaust 7 drawn from an inside of the vehicle 6 is inhaled by an exhaust fan 10 after cooling a motor 9, in an exhaust side passage. Thereby, an air temperature in the inside of the vehicle is approximately 26°C and is approximately 28°C after cooling the motor 9 even in a state where a temperature of fresh air (approximately higher than 40°C in a hottest summer) exceeds 40°C because of an increase of the temperature by the adiabatic compression by the air supply fan 3, and therefore, the load of the air conditioner is reduced by lowering a temperature on an air supply side to approximately 30°C by exchanging the heat in both by a heat pipe heat exchanger 20. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a ventilation device for a high-speed vehicle.
[0002]
[Prior art]
In a high-speed rail vehicle, especially in a tunnel, the pressure outside the vehicle fluctuates during traveling in a tunnel, and the fluctuation in the pressure outside the vehicle causes the inside pressure of the vehicle to change. The vehicle includes an air blower and an exhaust blower that discharges air inside the vehicle to the outside of the vehicle. The supply air blower and the exhaust blower are configured with a blower having a higher top pressure than the external pressure fluctuation, and the air supply and exhaust air volumes are made equal to eliminate the internal pressure fluctuation. This body is an airtight body. This ventilation device is disclosed, for example, in Japanese Patent Application Laid-Open No. 7-172308.
[0003]
In such a ventilation device, for example, as described in Japanese Patent No. 2675521, an air supply blower and an exhaust blower are provided at both ends of a shaft of a motor having a horizontal rotating shaft. Further, in order to cool the motor, the motor is surrounded by a case, and the motor is cooled by using exhaust air from inside the vehicle.
[0004]
By the way, since the top pressure of the ventilator's blower is high as described above, the temperature of the air passing through the blower is forced to rise due to adiabatic compression, and the fresh air taken from outside the vehicle becomes hot, increasing the load on the air conditioner. I was letting it. On the other hand, the air on the exhaust side has a high air specific gravity due to the arrival of a cold air-conditioned wind, resulting in an increase in the workload of the exhaust blower and an increase in power consumption.
[0005]
As for heat exchange, as disclosed in Japanese Patent Application Laid-Open No. 7-223538, heat is recovered by exchanging heat between the air inside the vehicle exhausted by a ventilator and the external air supplied by a total heat exchanger. A scheme has been proposed.
[0006]
As for heat exchange, as shown in JP-A-7-223538, heat is recovered by exchanging heat between the air in the vehicle exhausted by the ventilator and the external air supplied by a total heat exchanger. A scheme has been proposed.
[0007]
[Problems to be solved by the invention]
Since the top pressure of the ventilator blower is high as described above, the temperature of the air passing through the blower is forced to rise due to adiabatic compression, and the fresh air taken in from outside the vehicle becomes high temperature. Was increasing. On the other hand, the air on the exhaust side has a high air specific gravity due to the arrival of a cold air-conditioned wind, resulting in an increase in the workload of the exhaust blower and an increase in power consumption.
[0008]
On the other hand, the total heat exchanger that recovers waste heat has a problem in long-term reliability when mist-like rain is inhaled, such as when it is raining, because the material is easily weakened by moisture in the air. Also, when a train runs through a tunnel, a large pressure fluctuation occurs in the tunnel, so a differential pressure is generated between the supply and exhaust sides of the total heat exchanger, and the material of the total heat exchanger deteriorates due to fatigue. There was a problem of going. Further, over time, dust accumulates on the total heat exchanger, and as a result, the supplied air volume may exceed the exhaust air volume. This phenomenon promotes the pressure inside the vehicle to become higher than the atmospheric pressure, and thus hinders the opening and closing of the door.
[0009]
An object of the present invention is to provide a ventilation device that can reduce an air conditioning load.
[0010]
[Means for Solving the Problems]
The purpose is
In a vehicle ventilation system comprising an air supply blower for supplying air outside the vehicle into the vehicle and an exhaust air blower for discharging air inside the vehicle to the outside of the vehicle,
A heat pipe type heat exchanger having one end side in the discharge side air flow path of the air supply blower and the other end side in the suction side air flow path of the exhaust blower,
By configuring a ventilation system consisting of
Can be achieved.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. Fresh air outside the vehicle passes from the air supply inlet through the air supply duct 3b, the air supply blower 4, the heat exchanger section (referred to as the air supply side) 22 at one end of the heat pipe heat exchanger 20, and the air supply duct 3d. Enters the air conditioner 5. In the air conditioner 5, the air is heated or cooled, and is sent into the vehicle interior 6.
[0012]
Further, the air in the vehicle interior 6 enters the ventilation device through the exhaust duct 8b, cools the electric motor 9 in the exhaust duct 8c, and then heat exchangers (hereinafter referred to as the exhaust side) of the heat pipe heat exchanger 21 in the exhaust duct 8d. ) 23, passes through the exhaust blower 10, passes through the exhaust duct 8e, and is discharged from the vehicle 8f to the outside of the vehicle.
[0013]
As described above, the temperature of the air passing through the heat pipe heat exchangers 20 and 22 rises due to the adiabatic compression by the air supply blower 3, and thus exceeds 40 ° C. in a hot summer. On the other hand, in summer, the temperature of the air passing through the heat pipe type heat exchanger 23 of the heat pipe heat exchanger 20 draws the exhaust gas 7 of the vehicle interior 6 cooled by the air conditioner 5 to about 26 ° C. Is about 28 ° C. because of the cooled air.
[0014]
According to such a configuration, since the air passing through the ventilation device undergoes heat exchange in the heat pipe heat exchanger 20, the temperature of the air entering the air conditioner 5 in the above state is about 30 ° C. The temperature of the incoming air is about 40 ° C.
[0015]
For this reason, the load applied to the air conditioner can be reduced even in an extremely hot summer, and power consumption can be reduced. Further, the heat pipe heat exchanger 20 only circulates the refrigerant inside naturally, and does not require an operating object such as an air conditioner constituting a cycle for forcibly circulating the refrigerant, so that the power consumption of the ventilator increases. There is nothing.
[0016]
Further, since the temperature of the air entering the exhaust blower 10 rises from 26 to 28 ° C. to about 40 ° C., the air specific gravity is reduced by about 4%, and the power consumption of the electric motor 9 linked to the air specific gravity is also reduced. . As a result, the current of the electric motor 9 decreases, the heat generation inside the electric motor 9 also decreases, and the temperature rise inside the motor 9 decreases, so that the temperature of the lubricating oil of the bearing used in the electric motor 9 also decreases. The service life of the lubricating oil can be extended.
[0017]
In order to maximize the heat exchange between the heat pipe heat exchangers 20 and 22 and the heat pipe heat exchanger 23, the heat pipe heat exchanger 23 is preferably installed before the electric motor 9 is cooled. However, in the case of this installation, the temperature of the air in the exhaust duct 8c rises when passing through the heat pipe type heat exchanger 23, so that the motor 9 is cooled by high-temperature air. Tends to decrease. It is conceivable to install the heat pipe heat exchanger 23 of the heat pipe heat exchanger 21 on the discharge side of the exhaust blower 10 as well as on the air supply side, but the temperature rises due to adiabatic compression of the blower (about 26 ° C. The temperature is about 35 ° C. or more.) Therefore, the difference between the temperature and the temperature passing through the heat pipe heat exchanger 22 decreases, and the amount of heat to be exchanged decreases, so that the air in the heat pipe heat exchanger 22 cannot be sufficiently cooled. .
[0018]
From the above, considering the overall advantages and disadvantages, as shown in FIG. 1, the heat pipe type heat exchanger 23 is preferably provided in the exhaust duct 8 d passing through the electric motor 9.
[0019]
The arrangement of the heat pipe heat exchanger 20 will be described with reference to FIG. FIG. 2 is an installation state diagram of the ventilation device, in which the air supply blower 4 is located above the exhaust blower 10. The drive shaft of the electric motor 9 for driving the blowers 4 and 10 is along the vertical direction. The electric motor 9, the blowers 4, 10 and the like are installed in a box 30. The inside of the box 30 is partitioned, and the supply / exhaust ducts 3b, 3c, 8c, 8d are installed. The outlet 3e of the air supply duct 3c is below the air outlet of the blower 4, and the duct 3c is bent to the right. The duct 3c passes above the electric motor 9.
[0020]
The heat pipe heat exchanger 20 is bent in an L shape. One end (upper side) of the L shape, that is, the heat pipe heat exchanger 22 is in the duct 3c. The heat pipe type heat exchanger 23 at the other end (lower side) of the L shape is in the duct 8 d on the front surface of the electric motor 9.
[0021]
Although the axis of the ventilator is oriented vertically in FIG. 2, it may be oriented horizontally.
[0022]
The embodiment of FIGS. 3 and 4 will be described. This is a dust removing device for the heat pipe type heat exchanger 23. This heat exchanger is located in the exhaust duct of the cabin air. For this reason, the exhaust air contains purple smoke and fibrous dust generated from seats, particularly in the case of smoking vehicles. For this reason, there is a concern that dust will accumulate on the upstream side of the heat pipe type heat exchanger 23 provided in the exhaust passage of the ventilator over time. This phenomenon causes a decrease in the displacement, and as a result, the supply air amount exceeds the displacement amount, which causes an increase in the vehicle interior pressure. As a result, door opening and closing may be hindered.
[0023]
In this embodiment, this phenomenon is prevented, and a dust removing device including a propeller type impeller 46 and a brush 47 is mounted on the upstream side of the heat pipe type heat exchanger 23. . The brush 47 and the downstream side of the propeller 46 can be fixed by bonding. The brush 47 is in contact with the upstream end of the fin of the heat pipe type heat exchanger 23.
[0024]
The impeller 36 receiving the dynamic pressure of the exhaust air passing through the heat pipe type heat exchanger 23 rotates, and the brush 37 provided coaxially with the impeller 36 rotates together. As the brush 37 rotates, the upstream side surface of the heat pipe type heat exchanger 23 is always cleaned, so that it is possible to prevent the accumulation of dust on the heat pipe type heat exchanger 23.
[Brief description of the drawings]
FIG. 1 is a device configuration diagram of an embodiment of the present invention.
FIG. 2 is a layout diagram of a heat pipe heat exchanger.
FIG. 3 is a top view of the dust removing device of the heat pipe type heat exchanger.
FIG. 4 is a side view of a dust removal device provided in the heat pipe type heat exchanger of FIG.
[Explanation of symbols]
3b, 3c, 3d: air supply duct, 4: air supply blower, 5: air conditioner, 8b, 8c, 8d, 8e: exhaust duct, 9: electric motor, 10: exhaust air blower, 20, 22: heat pipe heat exchanger , 23 ... heat pipe type heat exchanger, 36 ... impeller, 37 ... brush.

Claims (3)

In a vehicle ventilation system comprising an air supply blower for supplying air outside the vehicle into the vehicle and an exhaust air blower for discharging air inside the vehicle to the outside of the vehicle,
A heat pipe type heat exchanger having one end side in the discharge side air flow path of the air supply blower and the other end side in the suction side air flow path of the exhaust blower,
Ventilation device for vehicles. The ventilation device according to claim 1,
At least one motor of the air supply blower and the exhaust blower is in the suction side air flow path of the exhaust blower,
The other end side of the heat pipe type heat exchanger is installed downstream of the electric motor in a flow direction of air in the suction side air flow path,
A vehicle ventilation device characterized by the above-mentioned. The ventilation device according to claim 1,
On the upstream side of the heat pipe type heat exchanger, a brush which is in contact with the upstream end of the heat pipe type heat exchanger and is rotated by the air passing through the heat pipe type heat exchanger is installed.
The ventilation device characterized by the above.

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