JP2006082803A - High tension electric component cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely cool an inverter and a battery. <P>SOLUTION: This high tension electric component cooling device 1 for cooling the battery 5 for supplying power to a travelling motor of an automobile through the inverter and for cooling the inverter with air inside a cabin is provided with an intake grille 4b exposed inside the cabin to lead the air, and the intake grille 4b has a plurality of intake openings 4c in the top surface and side surfaces thereof. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a high voltage electrical equipment cooling device that cools high voltage equipment (battery, inverter, etc.) of an automobile that runs only with a motor or an engine and an automobile.

In a vehicle that runs only by a motor or a vehicle that runs by an engine and a motor (hereinafter referred to as a hybrid vehicle), when the motor is fed from a battery of a DC power source, it is converted from DC to AC by an inverter. Then, when accumulating part of the engine output or the kinetic energy of the vehicle in the battery via the motor, AC is converted into DC by the inverter and stored (for example, see Patent Document 1).
JP 2001-163065 A

  By the way, although a battery and an inverter (hereinafter, these are collectively referred to as a high-piezoelectric equipment) generate heat during operation, the battery may have a low charge / discharge efficiency at a high temperature, and the inverter has a heat resistant temperature. If it exceeds this, damage may occur. If the capacity of the inverter is increased, the amount of heat generated can be reduced. However, the increase in capacity leads to an increase in size and weight of the inverter, which is not preferable for in-vehicle use, and the in-vehicle inverter is required to be as small as possible. . Along with this, cooling of the inverter is indispensable.

Therefore, in automobiles equipped with these high-voltage equipment, how to efficiently cool the high-voltage equipment in a limited mounting space is a major issue.
Accordingly, the present invention provides a high-piezoelectric equipment cooling device for automobiles that is small and lightweight and can efficiently cool high-piezoelectric equipment.

  In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a battery (for example, in an embodiment described later) that feeds power to an automobile driving motor via an inverter (for example, an inverter 7 in an embodiment described later) A high voltage electrical equipment cooling device (for example, a high voltage electrical equipment cooling device 1 in an embodiment to be described later) that cools the battery 5) and the inverter with air in the vehicle interior, and that is exposed to the vehicle interior and introduces air. (For example, an intake grill 4b in an embodiment described later), and the intake grill has a plurality of intake ports (for example, an intake port 4c in an embodiment described later) on its upper surface and side surface. It is an electrical equipment cooling device.

According to a second aspect of the present invention, in the first aspect of the invention, the high-voltage electrical equipment cooling device is provided on a rear side of a rear seat of an automobile (for example, a rear seat 2 in an embodiment described later), and the intake grill Is arranged on a rear tray (for example, a rear tray 4 in an embodiment to be described later) installed on the rear upper side of the rear seat.
The invention according to claim 3 is the invention according to claim 2, wherein the rear tray is provided with an opening (for example, an opening 4a in an embodiment to be described later), and the intake grill is installed in the opening. It is characterized by being.
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, the high-voltage electrical equipment cooling device is provided between the rear seat and a trunk room (for example, the trunk room 3 in an embodiment described later). An air exhaust port (for example, a cooling air outlet 41 in an embodiment described later) that is installed in between and exhausts the air introduced into the high piezoelectric device cooling device is provided on the trunk room side. Features.

  According to the first to fourth aspects of the present invention, even if an object is placed on the intake grille and the intake port on the upper surface of the intake grille may be blocked, the vehicle is removed from the intake port on the side surface of the intake grille. Since the indoor air can be introduced into the high piezoelectric device cooling device, the battery and the inverter can be reliably cooled.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a high voltage electrical equipment cooling apparatus for an automobile according to the present invention will be described with reference to the drawings of FIGS. The vehicle in this embodiment is a hybrid vehicle. In this hybrid vehicle, when an electric power is supplied from a DC power source battery to a motor, the inverter converts the DC to AC, and the engine output or vehicle motion When a part of energy is stored in the battery via the motor, AC is converted into DC by an inverter and stored. Further, since the DC voltage converted by the inverter is high voltage, a part thereof is stepped down by the DC / DC converter. The high voltage electrical equipment cooling device in this embodiment cools the battery, the inverter, and the DC / DC converter.

First, with reference to the schematic diagram of FIG. 1, an outline of the high-voltage electrical equipment cooling device 1 in this embodiment will be described. The high piezoelectric device cooling apparatus 1 includes an intake duct 10, a battery box 20, a heat sink case 30, an exhaust duct 40, an exterior box 50, and a fan 60.
The intake duct 10 has a cooling air inlet 11 that is opened and closed by a shutter 13. The battery box 20 has a box shape, and its upper opening 21 is connected to the lower opening 12 of the intake duct 10. A battery (not shown in FIG. 1) is mounted inside the battery box 20, and cooling air can be circulated. The heat sink case 30 also has a box shape, and its upper opening 32 b is connected to the lower opening 42 of the exhaust duct 40. A heat sink is provided inside the heat sink case 30 and cooling air can be circulated. An inverter and a DC / DC converter (both not shown in FIG. 1) are installed on the outer surface of the heat sink case 30. .

  The battery box 20, the heat sink case 30, the inverter and the DC / DC converter are surrounded by an outer box 50. The exterior box 50 is a sealed box having openings 53 and 54 in the upper part, and one opening 53 is connected in a sealed state to a connection portion between the lower opening 12 of the intake duct 10 and the upper opening 21 of the battery box 20. The other opening 54 is connected to a connecting portion between the lower opening 42 of the exhaust duct 40 and the upper opening 32b of the heat sink case 30 in a sealed state. Further, the internal space of the exterior box 50 allows the lower opening 22 of the battery box 20 and the lower opening 32 c of the heat sink case 30 to communicate with each other.

  The exhaust duct 40 has a cooling air outlet 41, and a fan 60 is provided at the cooling air outlet 41. The fan 60 and the shutter 13 operate in conjunction with each other. When the fan 60 is rotated, the shutter 13 is opened, and when the fan 60 is stopped, the shutter 13 is closed. The battery box 20, the heat sink case 30 and the exterior box 50 constitute an electrical box 70.

  In the high voltage electrical equipment cooling device 1 configured as described above, when the fan 60 is rotated, the shutter 13 is opened, and the cooling air is introduced into the intake duct 10 from the cooling air inlet 11. The cooling air introduced into the intake duct 10 is discharged from the intake duct 10 through the battery box 20 into the exterior box 50. The cooling air exchanges heat with the battery as it passes through the battery box 20, and as a result, the battery is cooled, and the cooling air rises slightly in temperature and is discharged into the exterior box 50. Since the battery management temperature is low, even if the temperature of the cooling air rises due to the cooling of the battery, the temperature is sufficiently low to cool the inverter and the DC / DC converter.

  The cooling air discharged into the exterior box 50 is introduced into the heat sink case 30 because the exterior box 50 is a sealed box. That is, the inside of the exterior box 50 becomes a cooling air passage 57 that guides the cooling air after cooling the battery to the inverter. The cooling air introduced into the heat sink case 30 is discharged into the exhaust duct 40 through the heat sink case 30, and further sucked into the fan 60 through the cooling air outlet 41 and discharged to the outside. The cooling air exchanges heat with the heat sink when passing through the heat sink case 30. Since the heat of the inverter and the DC / DC converter is transferred to the heat sink via the heat sink case 30, the inverter and the DC / DC converter are cooled by heat exchange between the cooling air and the heat sink.

  As described above, in this high piezoelectric device cooling device 1, the inverter and the DC / DC converter are cooled by the cooling air after the battery is cooled in consideration that the temperature of the inverter and the DC / DC converter is higher than the management temperature of the battery. Therefore, the battery, the inverter, and the DC / DC converter can be efficiently cooled with energy saving (less cooling energy). Further, since the battery, the inverter, and the DC / DC converter are collectively accommodated in one electrical box 70 and cooled by flowing cooling air therein, a plurality of cooling devices that individually cool each of them are provided. Can be small and light. Further, since the cooling air is forced to flow by the fan 60, the battery, the inverter and the DC / DC converter can be reliably cooled. In addition, since one fan 60 is sufficient, the apparatus can be reduced in size and weight.

Next, with reference to the drawings of FIGS. 2 to 10, the high-voltage electrical equipment cooling device in this embodiment will be described more specifically.
2 is an exploded perspective view of the high-voltage cooling device 1 as seen from the front side of the automobile, FIG. 3 is a cross-sectional view of the same, FIG. 4 is a front view of the same as seen from the front side of the automobile, and FIG. FIG. 6 is a rear view seen from the rear side of the automobile, FIG. 7 is a longitudinal sectional view of the battery housing portion, and FIG. 8 is an enlarged view of the main part of FIG. 9 is a longitudinal sectional view of the inverter housing portion, and FIG.

In this embodiment, as shown in FIG. 7 and FIG. 9, the high piezoelectric device cooling device 1 is installed between the rear seat 2 and the trunk room 3 of the automobile and slightly rearward along the rear surface of the rear seat 2. It is installed at an angle.
The high piezoelectric device cooling apparatus 1 includes an intake duct 10, a battery box 20, a heat sink case 30, an exhaust duct 40, an exterior box 50, and a fan 60.

The intake duct 10 and the exhaust duct 40 are formed of foamed polypropylene or the like that is lightweight and has high heat insulation properties.
As shown in FIG. 2 and FIG. 7, the intake duct 10 is provided with a cooling air inlet 11 at the upper end and a lower opening 12 that is horizontally longer than the cooling air inlet 11 and has a larger opening area.
The cooling air inlet 11 of the intake duct 10 is connected to an intake grill 4b installed in the opening 4a through an opening 4a formed in the rear tray 4 of the automobile. The intake grille 4b is provided with a large number of intake ports 4c on the upper surface and side surfaces of the portion exposed in the passenger compartment, and when an object is placed on the intake grille 4b and the upper intake port 4c is blocked. However, the vehicle interior air can be introduced into the intake duct 10 from the side intake port 4c.

  A shutter 13 is installed in the intake duct 10 and in the vicinity of the cooling air inlet 11. The shutter 13 made of EPDM rubber or the like is rotatably installed with the upper part as a fulcrum. Usually, the shutter 13 hangs down by its own weight, and as shown by a solid line in FIG. 7, a valve seat 14 provided in the middle of the intake duct 10. Sit down to close the cooling air flow path. When a negative pressure is generated on the downstream side of the shutter 13, the shutter 13 rotates upward and is separated from the valve seat 14 to open the cooling air flow path.

  As shown in FIGS. 2, 6 and 9, the exhaust duct 40 is provided with a cooling air outlet 41 at the upper rear and two lower openings 42 at the lower end. The cooling air outlet 41 is provided with a fan 60 for discharging the cooling air in the exhaust duct 40, and the cooling air discharged from the exhaust port 61 of the fan 60 is discharged to the trunk room 3 through a duct (not shown). The

The intake duct 10 and the exhaust duct 40 are connected by a battery box 20, a heat sink case 30, and an exterior box 50.
The battery box 20 is made of a material having high rigidity such as aluminum, and has a box shape having a plurality of upper openings 21 and lower openings 22 in the vertical direction as shown in FIGS. The internal space 23 of the battery box 20 is a passage through which cooling air flows, and is a storage space in which a large number of batteries 5 are mounted. The cooling air passes through the upper opening 21 and passes through the internal space 23 of the battery box 20. It flows into the interior of the battery 5 and passes between the batteries 5. At this time, heat exchange with the battery 5 is performed, and then the battery is discharged from the lower opening 22 to the outside of the battery box 20.

  In addition, a pair of left and right fixing bosses 24 and 25 project from the upper front side and the lower rear side of the battery box 20, respectively. As shown in FIGS. 7 and 8, the upper two fixing bosses 24, 24 are fixed to the rear tray 4 and its reinforcing member 4d with bolts 26a. On the other hand, as shown in FIGS. 6 and 7, the two lower fixing bosses 25, 25 are fixed to the pipe frame 6a installed in the trunk room 3 along the width direction of the vehicle body by bolts 26b. The pipe frame 6a is spanned and fixed between a pair of side frames 6b, 6b fixed to the left and right of the vehicle body floor 6 in the trunk room 3, and is arranged to float slightly above the vehicle body floor 6. . As a result, the battery box 20 is firmly supported by fixing the upper front side two places and the lower rear side two places to the body of the automobile.

The heat sink case 30 is made of a highly rigid material such as aluminum, and as shown in FIGS. 3, 9, and 10, two box-shaped cylinders 32, 32 extending vertically are arranged in parallel in the left-right direction. The main body 31 is integrally connected. The rear surface of the main body 31 is disposed on substantially the same surface as the rear surface of the battery box 20.
A mounting arm 33 extends forward from both ends on the upper front side of the main body 31, and the tip of the mounting arm 33 is bent upward to form a fixing flange 34. The front surface of the fixing flange 34 is substantially flush with the front surface of the upper fixing boss 24 in the battery box 20, and the fixing flange 34 is attached to the rear tray 4 and its reinforcing member 4d with bolts 35a. It is fixed. In addition, fixing bosses 36 are provided at both lower rear side ends of the main body 31, and the fixing bosses 36 are fixed to the pipe frame 6a with bolts 35b. As a result, the heat sink case 30 is firmly supported with the upper front side two places and the lower rear side two places fixed to the body of the automobile.

  The internal space 32a of each cylinder 32 is a passage through which cooling air flows. In addition, in the internal space 32 a of each cylinder 32, a large number of heat dissipation plates (heat sinks) 37 are provided that extend from the front inner wall surface of the cylinder 32 and extend in the vertical direction. Furthermore, a heat transfer pedestal 38 protrudes from a portion of the outer surface on the front side of the main body 31 where the heat radiating plate 37 of each cylindrical body 32 is provided. A mounting tray 39 that substantially covers the front side of 31 is fixed. The upper end of the mounting tray 39 is disposed inside the arm 33, and the lower end extends below the main body 31.

  As shown in FIGS. 3 and 5, the inverter 7 and the DC / DC converter 8 are attached to the attachment tray 39. The DC / DC converter 8 steps down the voltage converted from alternating current to direct current by the inverter 7. In FIG. 9, reference numeral 7 a denotes a hood that is attached to the inverter 7 and covers the inverter 7. The periphery of the hood 7a is fitted to the outside of the mounting tray 39, and the inverter 7 is surrounded by the mounting tray 39 and the hood 7a. The DC / DC converter 8 is also provided with a hood having the same function and structure. In the heat sink case 30 configured as described above, the heat generated by the inverter 7 and the DC / DC converter 8 is transferred to the heat radiating plate 37 via the mounting tray 39, the heat transfer base 38 and the cylindrical body 32. Then, heat exchange is performed between the cooling air flowing through the internal space 32 a of the cylindrical body 32 and the heat radiating plate 37.

  The exterior box 50 is made of thin metal and has a box shape, and the battery box 20, the heat sink case 30, the inverter 7, and the DC / DC converter 8 are accommodated therein. As shown in FIG. 2, the exterior box 50 includes a box-shaped main body 51 having an opening on the entire front side, and a cover plate 52 that closes the front-side opening of the main body 51. On the upper surface of the main body 51, an opening 53 having the same shape and size as the upper opening 21 is formed at a position corresponding to the upper opening 21 of the battery box 20 (see FIG. 8), and each cylinder 32 in the heat sink case 30 is formed. An opening 54 having the same shape and size as the upper opening 32b is formed at a position corresponding to the upper opening 32b (see FIG. 10).

  As shown in FIG. 10, the periphery of the opening 54 in the exterior box 50 is placed on the periphery of the upper opening 32 b of the cylindrical body 32 in the heat sink case 30 with the sealing material 55 a interposed therebetween. The peripheral edge of the lower opening 42 in the exhaust duct 40 is placed on the peripheral edge of the opening 54 with the sealing material 55b interposed therebetween, and the exhaust duct 40 is fastened to the heat sink case 30 with bolts 43. The upper opening 32b of the heat sink case 30, the opening 54 of the exterior box 50, and the lower opening 42 of the exhaust duct 40 are connected in a sealed state.

  On the other hand, as shown in FIG. 8, the periphery of the opening 53 in the exterior box 50 is placed on the periphery of the upper opening 21 in the battery box 20 with the sealing material 55 c interposed therebetween. On the periphery of 53, the periphery of the lower opening 12 in the intake duct 10 is placed with the sealing material 55d interposed therebetween, and the intake duct 10 is fixed to the battery box 20 by fixing means (not shown). The upper opening 21 of the battery box 20, the opening 53 of the exterior box 50, and the lower opening 12 of the intake duct 10 are connected in a sealed state.

  Further, a flange portion 51 a is provided at the periphery of the opening on the front side of the exterior box 50, and the periphery of the cover plate 52 is fixed to the flange portion 51 a by screws 56. The flange portion 51a is disposed on substantially the same plane as the front surface of the upper fixing boss 24 in the battery box 20 and the front surface of the fixing flange 34 of the mounting arm 33 in the heat sink case 30. Are provided with notches so as to avoid interference with the fixing boss 24 and the fixing flange 34.

  Inside the exterior box 50, the lower end of the battery box 20 is separated from the bottom of the inner surface of the exterior box 50 (see FIG. 7), the lower end of the mounting tray 39 installed in the heat sink case 30 and the main body of the heat sink case 30. The lower end of 31 is spaced apart from the bottom of the inner surface of the exterior box 50 (see FIG. 9). The sealed exterior box 50 has a cooling air passage 57 that communicates the lower opening 22 of the battery box 20 and the lower opening 32 c of the cylindrical body 32 in the heat sink case 30.

  As shown in FIGS. 7 and 9, the exterior box 50 includes a fastening portion between the fixing boss 25 on the lower side of the battery box 20 and the pipe frame 6a, and the fixing boss 36 and the pipe of the heat sink case 30. At the fastening portion with the frame 6a, they are sandwiched between them and fastened together. The lower flange portion 51a and the cover plate 52 of the exterior box 50 are fixed to a support frame 6c installed on the vehicle body floor 6 along the width direction by bolts 6d. Furthermore, as shown in FIG. 10, the exterior box 50 is sandwiched and fastened together at the fastening portion between the exhaust duct 40 and the heat sink case 30 by the bolts 43 described above. In this embodiment, the battery box 20, the heat sink case 30, and the exterior box 50 constitute an electrical box 70.

  In the high voltage electrical equipment cooling device 1 configured as described above, when the fan 60 is rotated, the inside of the intake duct 10 becomes negative pressure. Therefore, the shutter 13 is rotated upward to be separated from the valve seat 14 and the flow path of the cooling air Opens. As a result, vehicle interior air flows into the intake duct 10 as cooling air from the intake port 4c of the intake grill 4b, and further from the lower opening 12 of the intake duct 10 via the upper opening 21 of the battery box 20 to the battery box 20. It flows into the internal space 23 and flows downward between the batteries 5 in the internal space 23. At this time, the passenger compartment air (hereinafter referred to as cooling air) flowing through the internal space 23 exchanges heat with the battery 5. As a result, the battery 5 is cooled, and the cooling air is heated to slightly increase in temperature. However, since the management temperature of the battery 5 is low, even if the temperature of the cooling air rises due to heat exchange with the battery 5, the temperature rise is small, and the temperature is low enough to cool the inverter 7 and DC / DC converter 8. It is. The cooling air that has cooled the battery 5 is discharged from the lower opening 22 of the battery box 20 into the exterior box 50.

  Since the exterior box 50 is sealed and the flow path through which air can flow out is only the internal space 32a of both the cylindrical bodies 32 of the heat sink case 30, the cooling air discharged from the battery box 20 to the exterior box 50 is cooled. The air flows through the air passage 57 from the lower openings 32c of both the cylinders 32 to the internal space 32a of the cylinder 32, and rises through the space between the heat radiating plates 37. At this time, the cooling air flowing through the internal space 32a exchanges heat with the heat radiating plate 37. As a result, the heat radiating plate 37 is cooled, and the cooling air is heated to increase the temperature. By the way, since the heat generated in the inverter 7 and the DC / DC converter 8 is transferred to the heat radiating plates 37 in the both cylinders 32, the inverter 7 and the DC / DC converter 8 are cooled by cooling the heat radiating plates 37. It will be cooled.

  Then, the cooling air whose temperature has been raised by heat exchange with the heat radiating plate 37 is discharged from the upper openings 32b of the respective cylinders 32 in the heat sink case 30 through the lower openings 42 of the exhaust duct 40 into the exhaust duct 40, and The air is sucked into the fan 60 from the cooling air outlet 41 of the exhaust duct 40. Thereafter, the cooling air is discharged from the exhaust port 61 of the fan 60 into the trunk room 3 through a duct (not shown).

Thus, in this high piezoelectric device cooling device 1, the battery 5 having a low management temperature is first cooled with the cooling air, and the high-temperature inverter 7 and the DC / DC converter 8 are cooled with the cooling air after the battery 5 is cooled. Therefore, the battery 5, the inverter 7, and the DC / DC converter 8 can be efficiently cooled with energy saving (less cooling energy).
Further, since the battery 5, the inverter 7 and the DC / DC converter 8 are collectively housed in one electrical box 70 and cooled by flowing cooling air therein, a plurality of cooling devices for cooling each of them are provided. It can be made smaller and lighter than provided. Furthermore, since the cooling air is forced to flow by the fan 60, the battery 5, the inverter 7 and the DC / DC converter 8 can be reliably cooled. In addition, since one fan 60 is sufficient, the apparatus can be reduced in size and weight.

Further, since the cooling air introduced from the intake grille 4b is low-temperature vehicle interior air whose temperature is adjusted by air conditioning, the battery 5, the inverter 7, and the DC / DC converter 8 can be quickly and reliably cooled.
Further, when the fan 60 is not in operation, the shutter 13 closes the air flow path of the intake grill 4b and prevents the introduction of vehicle interior air from the cooling air inlet 11, so that direct sunlight is applied to the rear tray 4 while the vehicle is stopped. It is possible to prevent hot air in the passenger compartment whose temperature has risen due to contact with the electric box 70 from flowing into the electrical box 70, and to prevent the battery 5, the inverter 7, and the DC / DC converter 8 from rising in temperature.

  Further, since the heavy battery box 20 and the heat sink case 30 are independently fixed to the body of the automobile, the load of the battery box 20 and the heat sink case 30 is not applied to the exterior box 50. Therefore, the mechanical strength of the large-capacity exterior box 50 can be kept low, and the exterior box 50 can be reduced in weight.

[Other Embodiments]
The present invention is not limited to the embodiment described above.
For example, in the embodiment described above, the fan 60 is provided on the downstream side of the electrical box 70 so as to suck the cooling air. However, the fan 60 is installed on the upstream side of the electrical box 70 and the cooling air is supplied to the electrical box 70. You may make it pump.
In addition, although the automobile in the above-described embodiment is a hybrid automobile, the present invention can also be applied to an electric automobile that runs only with a motor.

It is the figure which showed typically one Embodiment of the high piezoelectric equipment cooling device of the motor vehicle based on this invention. It is the disassembled perspective view which looked at the high piezoelectric equipment cooling device in the said embodiment from the front side of the motor vehicle. It is a cross-sectional view of the high piezoelectric device cooling device in the embodiment. It is the front view which looked at the high piezoelectric equipment cooling device in the above-mentioned embodiment from the front side of a car. It is the front view which removed the partial structure of the high piezoelectric equipment cooling device in the said embodiment, and was seen from the front side of the motor vehicle. It is the rear view seen from the back side of the automobile of the high piezoelectric equipment cooling device in the embodiment. It is a longitudinal cross-sectional view in the battery accommodating part of the high voltage electrical equipment cooling device in the said embodiment. It is a principal part enlarged view of FIG. It is a longitudinal cross-sectional view in the inverter accommodating part of the high voltage electrical equipment cooling device in the said embodiment. It is a principal part enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 High piezoelectric equipment cooling device 2 Rear seat 3 Trunk room 4 Rear tray 4a Opening 4b Intake grill 4c Inlet 5 Battery 7 Inverter 41 Cooling air outlet (air outlet)

Claims (4)

A high voltage electrical equipment cooling device for cooling a battery for supplying electric power to a motor for traveling of an automobile via an inverter and the inverter with air in a passenger compartment,
A high-piezoelectric cooling device comprising an intake grille that is exposed to a vehicle interior and introduces air, the intake grille having a plurality of intake ports on an upper surface and a side surface thereof.   2. The high voltage electrical equipment cooling according to claim 1, wherein the high voltage electrical equipment cooling device is provided on a rear surface side of a rear seat of an automobile, and the intake grill is disposed on a rear tray installed on an upper rear side of the rear seat. apparatus.   3. The high voltage electrical equipment cooling device according to claim 2, wherein an opening is provided in the rear tray, and the intake grill is installed in the opening.   The high voltage electrical equipment cooling device is installed between the rear seat and the trunk room, and an air exhaust port for exhausting air introduced into the high voltage electrical equipment cooling device is provided on the trunk room side. The high piezoelectric device cooling device according to any one of claims 1 to 3.

Images