JP4543465B2 - Exhaust system for in-vehicle equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hybrid vehicle or the like that uses an electric motor (motor) and an internal combustion engine (engine) as drive sources in order to exhaust cooling air that cools an in-vehicle battery pack that is mounted as a drive source of the electric motor. In particular, the present invention relates to an exhaust device for an in-vehicle device that exhausts air used for air conditioning of the in-vehicle device.
[0002]
[Prior art]
In a hybrid vehicle using both an electric motor (motor) and an internal combustion engine (engine) as drive sources, an assembled battery combining a plurality of single cells is used as the drive source of the electric motor. Since such an assembled battery needs to be mounted in a limited space in an automobile, it needs to be compact and lightweight. For this reason, a rectangular battery module having a thin flat plate shape has been developed as a single battery. This battery module has a flat hollow rectangular parallelepiped battery case made of plastic, and the inside of the battery case is divided into a plurality of cells. In each cell, an electrolytic solution and an electrode body are accommodated.
[0003]
In such a battery module, an assembled battery obtained by stacking and integrating a plurality of battery modules in the thickness direction is housed in a battery housing case to form an in-vehicle battery pack, and is attached to an appropriate position on the body of the automobile.
[0004]
Each battery module generates heat due to an internal electrochemical reaction, and its temperature rises. Since the power generation efficiency decreases when the temperature of each battery module increases, for example, cooling air is supplied into the battery housing case to cool each battery module of the assembled battery provided in the battery housing case. Has been done.
[0005]
For example, in Japanese Patent Laid-Open No. 9-289701, a battery is accommodated by providing spaces below and above the assembled battery inside the battery accommodating case, and sucking air in the space above the assembled battery with an exhaust fan. The structure which attracts | sucks cooling air in the space below in a case is disclosed. The cooling air flowing into the battery housing case by the exhaust fan cools each battery module while passing between the battery modules in the assembled battery. And the cooling air which cooled each battery module is attracted | sucked by the exhaust fan from the upper part of a battery storage case, and is discharged | emitted outside the vehicle through an exhaust duct.
[0006]
Japanese Patent Laid-Open No. 10-306722 discloses a mode in which cooling air discharged from a battery housing case by an exhaust fan is discharged to the outside of the vehicle through an exhaust duct by a switching damper and a mode in which the cooling air is circulated into the vehicle interior. A configuration for switching is disclosed.
[0007]
[Problems to be solved by the invention]
As described above, when the cooling air discharged from the exhaust fan is switched between the mode in which the cooling air is circulated in the vehicle interior and the vehicle interior by the switching damper, if the direction of the cooling air is suddenly changed by the switching damper, a large noise is generated. May occur. In particular, immediately after the cooling air is discharged from the exhaust fan, the flow velocity of the cooling air is maximized, and if the direction of the cooling air is greatly changed, the possibility of generating large noise increases.
[0008]
The present invention solves such a problem, and an object of the present invention is to provide an exhaust device for an in-vehicle device that can reduce the generation of large noise even when the air-conditioning exhaust can be switched between outside and inside the vehicle. It is to provide.
[0009]
[Means for Solving the Problems]
An exhaust device for an in-vehicle device according to the present invention includes an exhaust fan that sucks air used for air conditioning of the in-vehicle device and exhausts the air from an exhaust unit, and guides the air exhausted from the exhaust fan to the outside of the vehicle. The exhaust duct is disposed between the exhaust fan and the exhaust fan and the exhaust duct, and the air exhausted from the exhaust fan by the valve body provided in the housing is disposed on the side of the housing. An exhaust switching unit adapted to be switched to the switching port and discharging the exhaust duct, and the exhaust duct is connected to the exhaust unit via the exhaust switching unit, and a housing of the exhaust switching unit includes an exhaust fan It is characterized in that it is inclined toward the side surface opposite to the side surface provided with the passenger compartment side switching port with respect to the axial direction in the exhaust section.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram illustrating an exhaust device for exhausting cooling air for cooling an in-vehicle battery pack as an example of an embodiment of an exhaust device for an in-vehicle device according to the present invention, and FIG. 2 is a side view thereof. The exhaust device cools an assembled battery 11 provided in an in-vehicle battery pack 10 mounted on an automobile with cooling air generated by an exhaust fan 20 and exhausts the cooling air by switching between the outside of the vehicle and the interior of the vehicle. It is supposed to be. The assembled battery 11 is housed in a battery housing case 12 in which a plurality of rectangular battery modules 11 a having a flat rectangular parallelepiped shape are integrally stacked in the thickness direction.
[0012]
The battery module has a plastic battery case, and the inside of the battery case is divided into, for example, six equal parts in the longitudinal direction to form six square cells. An electrolytic solution and an electrode body are accommodated in each square cell.
[0013]
Inside the battery housing case 12, an exhaust chamber 12 a and an intake chamber 12 b are respectively formed at the upper and lower portions above and below the assembled battery 11 accommodated. One end of the first exhaust duct 14 is connected to the upper exhaust chamber 12 a, and the other end of the first exhaust duct 14 is connected to the exhaust fan 15. One end of the intake duct 13 is connected to the intake chamber 12 b below the battery housing case 12. The intake duct 13 extends vertically upward and then bends horizontally, and the other end (tip) is provided with an intake port 13a that opens into the interior of the automobile.
[0014]
One end of the first exhaust duct 14 is connected to the battery housing case 12 so as to extend almost horizontally from the battery housing case 12, and the other end (tip) is connected to the exhaust fan 15. It is connected. The exhaust fan 15 is configured by providing an impeller (not shown) in a casing 15a. The casing 15a includes a cylindrical casing main body portion 15b and an exhaust portion 15c extending in a tangential direction of the casing main body portion 15b. The tip of the first exhaust duct 14 having one end connected to the in-vehicle battery pack 10 is connected to the axial center of the cylindrical casing body 15b in the casing 15a in a state along the axial direction. Yes.
[0015]
The exhaust part 15c of the casing 15a extends obliquely downward along the tangential direction of the casing main body part 15b, and is connected to the exhaust part 15c via the exhaust gas switching part 17 at one end of the second exhaust duct 16. Are connected. The other end of the second exhaust duct 16 is an exhaust port 16a that opens to the outside of the automobile.
[0016]
When the internal impeller rotates, the exhaust fan 15 sucks the air (cooling air) in the first exhaust duct 14 and causes the cooling air to flow into the casing body 15b of the casing 15a. The cooling air that has flowed into the casing body 15b flows along the peripheral surface of the casing body 15b, and is discharged to the second exhaust duct 16 through the exhaust portion 15c that communicates with the casing body 15b.
[0017]
As shown in FIG. 2, the exhaust switching valve 17 includes a housing 17a connected to the exhaust portion 15c of the exhaust fan 15, a passenger compartment switching port 17b provided on one surface of the housing 17a, and the passenger compartment switching. And a valve body 17c provided to open and close the opening 17b.
[0018]
The vehicle interior side switching port 17 b of the exhaust gas switching unit 17 is open on one side surface that is continuous with the outer peripheral surface of the casing body 15 b in the exhaust fan 15. The housing 17a of the exhaust gas switching unit 17 is inclined with respect to the side surface opposite to the side surface on which the vehicle interior side switching port 17b opens with respect to the axial center of the exhaust unit 15c in the exhaust fan 15.
[0019]
The valve body 17c has a flat plate shape that covers the passenger compartment side switching port 17b, and the side edge portion on the second exhaust duct 16 side is located on the side edge portion on the second exhaust duct 16 side in the passenger compartment side switching port 17b. It is attached so that it can rotate. And the side edge part by the side of the exhaust fan 15 in the valve body 17c rotates the inside of the housing 17a upwards, and the compartment side switching port 17b is open | released. In this case, since the housing 17a of the exhaust gas switching unit 17 is inclined with respect to the axial center of the exhaust unit 15c in the exhaust fan 15, as described above, the valve body 17c is switched to the vehicle compartment side switching port. When rotating so as to open 17b, the valve body 17c is substantially along the axial center of the exhaust part 15c, and the cooling air sent from the exhaust part 15c flows linearly along the valve body 17c. Thus, the vehicle passes through the passenger compartment side switching port 17b.
[0020]
In the cooling device for the in-vehicle battery pack 10 having such a configuration, when the exhaust fan 15 is driven, the air in the first exhaust duct 14 is sucked into the casing 15a of the exhaust fan 15 and the peripheral surface of the casing body 15b. And is discharged from the exhaust part 15 c to the exhaust gas switching part 17. When the valve body 17c in the exhaust switching unit 17 closes the passenger compartment switching port 17b, the cooling air flowing into the housing 17a of the exhaust switching unit 17 passes through the housing 17a of the exhaust switching unit 17, It is discharged to the second exhaust duct 16. As a result, the air in the exhaust chamber 12a is sucked into the first exhaust duct 14, the inside of the battery housing case 12 is decompressed, and the air in the vehicle interior is housed in the air intake chamber 12b via the air intake duct 13. Sucked into the case 12.
[0021]
Air (cooling air) sucked into the intake chamber 12b in the battery housing case 12 is diffused over the entire interior of the intake chamber 12b, passes between the battery modules 11a in the assembled battery 11, and enters the exhaust chamber 12a. Flow into. Thereby, each battery module 11a is each cooled. Cooling air in the exhaust chamber 12 a is sucked into the casing 15 a of the exhaust fan 15 through the exhaust duct 14.
[0022]
The cooling air that has flowed into the casing 15a of the exhaust fan 15 flows along the peripheral surface of the casing body 15b, flows into the second exhaust duct 16 through the exhaust 15c, and then is exhausted from the second exhaust duct 16. Released from the mouth to the outside of the car.
[0023]
On the other hand, when the valve body 17c of the exhaust gas switching unit 17 is rotated to open the exhaust gas switching port 17b of the housing 17a, the cooling air in the battery housing case 12 sucked by the exhaust fan 15 is converted into the casing body part. It flows along the outer peripheral surface of 15b and flows into the housing 17a of the exhaust gas switching part 17 from the exhaust part 15c. And it flows along the valve body 17c provided in the housing 17a, passes the vehicle interior side switching port 17c, and is discharged into the vehicle interior.
[0024]
In this case, the housing 17a of the exhaust switching unit 17 has an end on the second exhaust duct 16 side facing the side surface provided with the vehicle interior side switching port 17b with respect to the axial center of the exhaust unit 15c in the exhaust fan 15. Since the cooling air passing through the housing 17a and passing through the passenger compartment side switching port 17b is hardly changed, the exhaust fan is not inclined. The generation of noise due to the cooling air discharged from 15 to the passenger compartment side switching port 17b is remarkably reduced.
[0025]
In addition, the cooling air that flows into the housing 17a of the exhaust switching unit 17 from the exhaust unit 15c of the exhaust fan 15 and is exhausted from the passenger compartment side switching port 17b is approximately the axial center of the exhaust unit 15c in the exhaust fan 15. Due to the flow along the straight line, the generation of noise due to the cooling air discharged from the passenger compartment side switching port 17b is more reliably reduced.
[0026]
When the cooling air is discharged from the exhaust fan 15 to the second exhaust duct, the passenger compartment side switching port 17b is closed by the valve body 17c, and the cooling exhausted from the exhaust part 15c of the exhaust fan 15 is performed. The wind may cause noise when the flow direction is changed by the valve body 17c, but the generated noise is generated in the housing 17a in which the passenger compartment side switching port 17b in the exhaust switching unit 17 is closed by the valve body 17c. It occurs in the cabin and there is almost no problem for passengers in the passenger compartment.
[0027]
The housing 17a of the exhaust switching unit 17 guides the cooling air discharged from the exhaust unit 15c of the exhaust fan 15 almost linearly with respect to the passenger compartment switching port 17b by the valve body 17c so that the flow direction is almost the same. The housing 17a is inclined with respect to the axial center direction of the exhaust part 15c so as not to change. As a configuration in which the flow direction of the cooling air guided to the side switching port 17b is slightly changed, the change in the flow direction of the cooling air guided to the second exhaust duct 16 may be reduced.
[0028]
In the above-described embodiment, the device for exhausting the cooling air that has cooled the assembled battery in the in-vehicle battery pack has been described. However, the present invention is not limited to such a device and is used for air conditioning of various in-vehicle devices. The present invention can be applied to any apparatus that exhausts used air.
[0029]
【The invention's effect】
As described above, the exhaust device of the in-vehicle device according to the present invention has almost the flow direction when the air exhausted from the exhaust fan is switched to be exhausted from the passenger compartment side switching port by the exhaust switching unit. Since the guidance is provided without being changed, there is no possibility that a large noise is generated by the air discharged from the passenger compartment side switching port .
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an example of an embodiment of an exhaust device for an in-vehicle battery pack according to the present invention.
FIG. 2 is a partially broken side view showing an enlarged main part thereof.
FIG. 3 is a perspective view of the main part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Vehicle battery pack 11 Battery assembly 11a Battery module 12 Battery storage case 12a Exhaust chamber 12b Intake chamber 13 Intake duct 14 First exhaust duct 15 Exhaust fan 15a Casing 15b Casing body part 15c Exhaust part 16 Second exhaust duct 17 Exhaust switch part 17a Housing 17b On-vehicle side switching port 17c Valve element

Claims (1)

An exhaust fan that sucks in air used for air conditioning of in-vehicle equipment and exhausts it from the exhaust part,
An exhaust duct for guiding the air discharged from the exhaust fan to the outside of the vehicle;
It is arranged between the exhaust fan and the exhaust duct, and the air exhausted from the exhaust fan is switched to the vehicle compartment side switching port provided on the side surface of the housing by a valve body provided inside the housing. An exhaust gas switching unit adapted to discharge,
The exhaust duct is connected to the exhaust part via the exhaust switching part, and the housing of the exhaust switching part is provided with a cabin side switching port with respect to the axial direction of the exhaust part of the exhaust fan. An exhaust device for an in-vehicle device, wherein the exhaust device is inclined toward a side surface opposite to the side surface .

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