JP2010158991A - Arrangement structure of electric compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an arrangement structure of an electric compressor capable of preventing electric leakage caused by the damage of the electric compressor in a collision of a vehicle in which any electric leakage hardly occurs from an energization part of a traveling system. <P>SOLUTION: In the arrangement structure of the electric compressor 25, an electric motor 16 for traveling is installed in a motor room 12 in a vehicle, and a compression mechanism for compressing fluid, and the electric compressor 25 integrated with an electric motor for the compressor driving a compressor mechanism are arranged in the motor room 12. A PCU 17 for controlling the drive power of the electric motor 16 for traveling is provided on the electric motor 16 for traveling, and the electric compressor 25 is provided at the PCU 17. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an arrangement structure of an electric compressor mounted on an electric vehicle or a hybrid vehicle.

In general, in an automobile using an engine, which is an internal combustion engine, as a travel drive source, a compressor constituting a part of an air conditioner is disposed in an engine room provided in the vehicle.
In the case of a compressor that is mechanically driven by the power of the engine via power transmission means such as a belt and a pulley, the compressor is often directly attached to the engine.
On the other hand, an electric compressor driven by an electric motor may be mounted on a hybrid vehicle or an electric vehicle as part of an air conditioner.
The electric compressor is a compressor in which a compression mechanism that compresses fluid and an electric motor that drives the compression mechanism are integrated.

In a hybrid vehicle, an engine as an internal combustion engine and an electric motor are used as driving sources, and the engine and the electric motor are arranged in a motor room.
In a hybrid vehicle, an arrangement structure of an electric compressor in which the electric compressor is directly fixed to the engine may be employed.
In this case, the electric compressor is disposed at a position close to a side member constituting a part of the frame or the body in the motor room.

Furthermore, in the electric vehicle, a traveling electric motor as a traveling drive source is disposed in the motor room.
In the case of an electric vehicle, an arrangement structure of an electric compressor in which the electric compressor is fixed to the front part or the side part of the electric motor for traveling may be employed.
Also in this case, the electric compressor is disposed at a position close to the frame and the side member in the motor room.

On the other hand, Patent Document 1 describes a scroll-type electric compressor in which a compression mechanism that compresses fluid and an electric motor that drives the compression mechanism are integrated.
This electric compressor is directly attached to an engine as a drive source installed in the engine room.
An alternator is mechanically connected to the engine, and the electric compressor is driven by the supply of electric power generated by the alternator.
Patent Document 1 shows an arrangement structure of an electric compressor in which the electric compressor is arranged closer to the traveling direction of the engine room.
This electric compressor is disposed at a position close to the vehicle frame and side members.

JP 2002-339865 A

However, in the conventional arrangement structure of the electric compressor, when the vehicle collides with a fixed object or other vehicle on the ground, the electric compressor arranged at a position close to the frame or side member of the vehicle is near the center in the engine room. Compared to equipment placed in the, there is a high possibility of damage in the event of a collision.
There is a risk of leakage due to damage to the electric compressor at the time of a vehicle collision.
In order to protect the electric compressor, it may be possible to increase the strength of the housing of the electric compressor or install a protective material to protect the electric compressor. Increases the number of parts or the number of parts.

Incidentally, when a vehicle collides, a hybrid vehicle or an electric vehicle may be equipped with a power supply cutoff system that cuts off the power supplied from the battery to the traveling electric motor depending on the degree of the collision.
This system includes an acceleration sensor that detects the presence or absence of a collision.
When the acceleration sensor detects a detection value that is equal to or greater than a predetermined value set in advance, the in-vehicle computer detects a collision that may cause a leakage from a traveling system energization site such as a traveling electric motor or a power control unit that controls the traveling electric motor. Judge that it occurred.
Then, the in-vehicle computer cuts off the power supply from the battery to the traveling electric motor.
Although it is conceivable to apply such a power supply shut-off system to an electric compressor, if a power supply cut-off system dedicated to the electric compressor is provided, the production cost increases.
In addition, if the electric power supply cutoff system uses both the electric motor for traveling and the electric compressor, the electric power supply to the electric motor for driving is interrupted even in the case of a collision where there is no risk of electric leakage from the traveling system energization site. The inconvenience that it is done arises.

  An object of the present invention is made in view of the above-described problems, and prevents leakage due to damage to an electric compressor at the time of collision of a vehicle in which there is no risk of leakage from a traveling system energization site. It is in the provision of the arrangement structure of the electric compressor which can do.

In the present invention, an electric motor for driving is installed in a motor room of a vehicle as one of driving driving sources, and an electric motor in which a compression mechanism for compressing fluid and an electric motor for a compressor for driving the compression mechanism are integrated. In the electric compressor arrangement structure in which the compressor is arranged in the motor room, a power control unit that controls the driving electric power of the electric motor for traveling is provided on the electric motor for traveling, and the electric compressor is operated as the electric power. It is provided in the control part.
In addition, the case where the power control unit is provided on the traveling electric motor includes the case where the power control unit is provided directly on the upper part of the traveling electric motor and the case where it is provided on another member above the traveling electric motor. .

In the present invention, the power control unit is a part that handles a large amount of electric power compared to the electric power of the electric compressor, and the electric power control unit is more in the motor room at the time of a vehicle collision than the position where the conventional electric compressor is installed. Is set at a position where it is difficult to damage.
Further, since the power control unit is a part that handles a large amount of power compared to the power of the electric compressor, the strength of the power control unit is set larger than the strength of the electric compressor.
As a result, the electric compressor provided in the power control unit is less likely to be damaged in the event of a vehicle collision where there is no risk of leakage from the traveling system energization site, and this causes damage to the electric compressor. It is possible to prevent electrical leakage.

  According to the present invention, in the arrangement structure of the electric compressor, the power control unit includes a control unit main body having electronic components and a casing that covers the control unit main body, and the electric compressor includes the casing. It may be provided on the outer wall of the body.

  In this case, since the electric compressor can be attached to the outer wall of the housing simply by providing the mounting portion of the electric compressor on the outer wall of the housing, the mounting structure between the outer wall of the housing and the electric compressor is simple. become.

  According to the present invention, in the arrangement structure of the electric compressor, the power control unit includes a control unit main body having electronic components and a casing that covers the control unit main body, and the electric compressor includes the casing. It may be provided on the inner wall of the body.

In this case, the electric compressor is protected by the housing in the same manner as the control unit main body.
The electric compressor is not subject to the interference of members existing outside the housing at the time of a vehicle collision, where there is no risk of leakage from the running system energization site, and compared with the case where the electric compressor is provided on the outer wall of the housing Thus, the electric compressor can be more reliably prevented from being damaged.

  According to the present invention, there is provided an arrangement structure of an electric compressor capable of preventing electric leakage caused by damage to the electric compressor at the time of a vehicle collision in which electric leakage from a traveling system energization site is not likely to occur. Can do.

It is a schematic plan view which shows the arrangement structure of the electric compressor which concerns on 1st Embodiment. It is a schematic side view which shows the arrangement structure of the electric compressor which concerns on 1st Embodiment. It is a longitudinal section of the electric compressor concerning a 1st embodiment. It is a schematic side view which shows the arrangement structure of the electric compressor which concerns on 2nd Embodiment. It is a schematic plan view which shows the arrangement structure of the electric compressor which concerns on another example.

(First embodiment)
Hereinafter, an arrangement structure of an electric compressor according to the first embodiment will be described with reference to the drawings.
This embodiment demonstrates the hybrid vehicle to which the arrangement structure of the electric compressor which concerns on this invention is applied.
In the hybrid vehicle 10 shown in FIG. 1, a cabin 11 is provided near the center of the vehicle, and a motor room 12 is formed in front of the cabin 11.
The motor room 12 in the vehicle is a space formed by a frame (not shown) constituting the vehicle and a side member (not shown) which is a part of the body.

The motor room 12 includes an engine 14 as a travel drive source, a motor generator 15 as a generator, and a travel electric motor 16 as another travel drive source.
The engine 14, the motor generator 15, and the traveling electric motor 16 are installed in the motor room 12 in a horizontal orientation as an integrated power unit 13.

The engine 14 is a gasoline engine that is an internal combustion engine. In this embodiment, the engine 14 is disposed on the right side in the traveling direction in the motor room 12.
The power obtained by driving the engine 14 is transmitted to wheels (not shown) via a power transmission mechanism (not shown).

The motor generator 15 is connected to the engine 14, and the motor generator 15 is driven by the drive of the engine 14 to generate electric power.
The electric power obtained by the motor generator 15 is stored in a battery (not shown) as a secondary battery, used for driving the electric motor 16 for traveling, or used for driving other devices.
In this embodiment, the traveling electric motor 16 is disposed on the left side in the traveling direction in the motor room 12.
The traveling electric motor 16 is an electric motor that is driven by the electric power of the battery or the electric power obtained by the motor generator 15, and the rotational force of the traveling electric motor 16 is transmitted to the wheels via a power transmission mechanism (not shown). Is transmitted to.

A power control unit (hereinafter referred to as “PCU”) 17 as a power control unit for controlling driving power is provided on the traveling electric motor 16.
The PCU 17 includes a PCU main body as a control unit main body composed of electronic components such as a semiconductor and a substrate, and a PCU case 18 as a housing containing the PCU main body.
The PCU body mainly includes an inverter 19 that controls conversion from DC power to AC power of a battery, a battery voltage booster circuit 20 that boosts the battery voltage, and a voltage smoothing capacitor (capacitor) that reduces voltage fluctuation during power conversion. ) 21.
The inverter 19 is composed of a plurality of switching elements such as IGBTs.
The PCU body is coupled to a power cable (not shown) connected to a stator (not shown) of the traveling electric motor 16 and a power cable (not shown) connected to a battery.

The PCU case 18 is a box with a lid formed of an aluminum-based material, and the PCU case 18 is positioned near the rear of the upper portion of the traveling electric motor 16 so that the PCU case 18 has a vehicle frame and the traveling electric motor 16. It is fixed against.
The installation position of the PCU case 18 in the motor room 12 corresponds to a position where the possibility of damage to the PCU 17 is small compared to the position on the right side of the front part of the motor room 12 at the time of a collision in which the front part of the vehicle is damaged.
The collision that damages the front part of the vehicle includes a full-lap frontal collision and an offset frontal collision, a collision from an oblique direction with respect to the front of the vehicle (sometimes referred to as “slanting”), and a side surface with respect to the front of the vehicle. Including collisions.
Since the PCU body built in the PCU case 18 is covered with the PCU case 18, it is isolated and protected from the outside.
The strength of the PCU case 18 is set based on a vehicle collision test.
As shown in FIGS. 1 and 2, a mounting seat 22 to which the electric compressor 25 is fixed is formed on the rear surface 18A of the outer wall portion of the PCU case 18, and a screw hole (not shown) is formed in the mounting seat 22. Is formed.

In addition to the power unit 13, an air conditioner is disposed in the motor room 12.
The air conditioner includes an electric compressor 25, a condenser 26 as a condenser, a receiver 27, a cooling unit 28 including an expansion valve and an evaporator, and piping (not shown) connecting these devices 25 to 28. It is composed of
The high-temperature and high-pressure refrigerant compressed by the electric compressor 25 passes through the condenser 26 through the discharge side piping and is sent to the receiver 27.
The refrigerant (liquid refrigerant) liquefied in the condenser 26 and the receiver 27 is expanded by the expansion valve of the cooling unit 28, and the expanded refrigerant exchanges heat with the conditioned air in the evaporator.
The conditioned air is deprived of heat by heat exchange with the refrigerant, and the refrigerant having saturated vapor pressure after the heat exchange is sent to the electric compressor 25 through the piping on the suction side.
The electric compressor 25 compresses the sent refrigerant again.
Thus, the refrigerant circuit which a refrigerant | coolant circulates is comprised by piping of the refrigerant | coolant which connects each apparatus 25-28 which comprises an air conditioner, and each apparatus 25-28.

The electric compressor 25 according to this embodiment is a known electric compressor, specifically, a scroll-type electric compressor.
As shown in FIG. 3, the electric compressor 25 is a compressor in which a compression mechanism 36 that compresses a refrigerant as a fluid and a compressor electric motor 45 that drives the compression mechanism 36 are integrated.
The housing 30 of the electric compressor 25 is made of an aluminum metal material.
A plurality of boss portions 31, 32, 33 are formed in the housing 30.
A boss hole 31A is formed in the boss portion 31, and a fixing bolt (not shown) used for mounting the electric compressor 25 to the installation destination is inserted into the boss hole 31A.
Boss holes 32A and 33A corresponding to the other boss portions 32 and 33 are also formed.
In this embodiment, the electric compressor 25 is fixed to the mounting seat 22 on the rear surface 18 </ b> A of the outer wall portion of the PCU case 18.

A compression mechanism 36 and an electric motor 45 for the compressor are provided in the housing 30 of the electric compressor 25.
A suction port 34 is formed in the housing 30 on the compressor electric motor 45 side, and low-pressure refrigerant passes through the suction port 34.
A discharge port 35 is formed on the compression mechanism 36 side of the housing 30, and the compressed high-pressure refrigerant passes through the discharge port 35.
The compression mechanism 36 includes a fixed scroll 37 fixed in the housing 30 and a movable scroll 38 that rotates with respect to the fixed scroll 37.
A compression chamber 39 is formed between the fixed scroll 37 and the movable scroll 38.

A shaft support member 40 is provided between the compressor electric motor 45 and the movable scroll 38 in the housing 30.
The shaft support member 40 constitutes a part of the compression mechanism 36 and supports one end of the rotation shaft 47.
The other end of the rotation shaft 47 is pivotally supported by the housing 30.
A suction port 41 communicating with the compression chamber 39 is formed in the shaft support member 40, and the refrigerant taken into the housing 30 from the suction port 34 is introduced into the compression chamber 39 through the suction port 41.

The movable scroll 38 is provided on an eccentric shaft 48 provided on the rotating shaft 47 of the electric motor 45 for the compressor via a bearing 44.
The movable scroll 38 is turned by the rotation of the rotary shaft 47, and the volume of the compression chamber 39 is increased or decreased by the turning of the movable scroll 38.
The refrigerant is introduced into the compression chamber 39 by increasing the volume of the compression chamber 39, and the refrigerant in the compression chamber 39 is compressed by decreasing the volume of the compression chamber 39.
A discharge port 42 is formed at the center of the fixed scroll 37, and a discharge valve 43 that opens and closes the discharge port 42 is provided.
The compressed refrigerant gas is discharged from the discharge port 35 to the refrigerant circuit through the discharge port 42.

The compressor electric motor 45 is a motor driven by three-phase AC power.
The compressor electric motor 45 includes a stator 46 fixed in the housing 30 and a rotor 49 provided on the rotating shaft 47.
The compressor electric motor 45 is driven under the control of the compressor electric motor control unit 50 provided in the housing 30.
The compressor electric motor control unit 50 includes a control unit case 51 formed integrally with the housing 30, an inverter 52 installed in the control unit case 51, and a smoothing capacitor 53.

The control unit case 51 is a case that protects the inverter 52 and the smoothing capacitor 53, and is formed of the same aluminum material as the housing 30.
The inverter 52 is connected to the PCU 17 by wiring (not shown), and receives supply of electric power necessary for driving the electric compressor 25 from the PCU 18.
The inverter 52 converts the DC power supplied from the PCU 17 into AC power.
The inverter 52 is connected to the stator 46, and the rotor 49 is rotated by energizing the stator 46.
The inverter 52 includes a plurality of switching elements such as IGBTs.
The smoothing capacitor 53 is a capacitor that reduces voltage fluctuation during power conversion, and an electrolytic capacitor is used.

In the vehicle of this embodiment, an acceleration sensor (not shown) that detects the acceleration at the time of the collision of the vehicle and a determination that the collision has occurred when the detection value of the acceleration sensor is equal to or greater than a predetermined value set in advance. An in-vehicle computer (not shown).
If the detected value of the acceleration sensor is equal to or greater than a predetermined value, the in-vehicle computer cuts off the power supply from the battery to the traveling electric motor 16 as a collision that may cause a leakage from the traveling system energized portion such as the traveling electric motor 16 or the PCU 17. To do.

Next, the operation of the arrangement structure of the electric compressor 25 according to this embodiment will be described.
In this embodiment, an arrangement structure of an electric compressor in which the electric compressor 25 is fixed to the outer wall portion rear surface 18A of the PCU case 18 is adopted.
For example, when the vehicle collides with a ground installation or another vehicle, the vicinity of the motor room 12 at the front of the vehicle may be damaged.
In the case of a vehicle collision in which the vicinity of the motor room 12 in the front part of the vehicle is damaged, there is a risk of electric leakage from the traveling system energized part, and the detected value of the acceleration sensor at the time of the collision becomes a predetermined value or more. The power supply from the battery to the traveling electric motor 16 is cut off.
The power supply from the battery and the traveling electric motor 16 is cut off, and the power supply to the electric compressor 25 is also cut off.
In this case, leakage due to damage to the traveling electric motor 16 and the electric compressor 25 is avoided.

On the other hand, the detected value of the acceleration sensor is less than a predetermined value in a collision that does not cause a leakage from the traveling system energized part.
In this case, although the vicinity of the collision portion of the motor room 12 is damaged, no damage that leads to leakage of the traveling system energized portion occurs.
In particular, in the PCU 17 that receives power supply from the battery, the PCU body is installed in the PCU case 18, and the PCU body does not possibly interfere with external members at the time of a collision.
Further, since the PCU case 18 is installed at a position near the rear in the motor room 12 and away from the side member of the body, the possibility that the front part of the frame and the side member interfere with the PCU case 18 is low.

The electric compressor 25 is provided on the rear surface 18A of the outer wall portion of the PCU case 18 of the electric motor 16 for traveling that does not cause a leakage.
Since the PCU 17 is a part that handles a large amount of electric power compared to the electric power of the electric compressor 25, the strength of the PCU 17 is set larger than the strength of the electric compressor 25.
Further, like the PCU case 18, the electric compressor 25 is installed at a position near the rear in the motor room 12 and away from the side member of the body. Absorbs part of the impact.
For this reason, the impact transmitted to the PCU case 18 is reduced, and the possibility that the PCU case 18 interferes with other members is low.
As a result, there is almost no possibility that the electric compressor 25 is damaged in a collision that does not cause the electric leakage from the traveling system energized portion, and the electric leakage due to the damage of the electric compressor 25 is avoided.

This embodiment has the following effects.
(1) The PCU 17 is set at a position in the motor room 12 that is less likely to be damaged during a vehicle collision than a position where a conventional electric compressor is installed. Further, since the PCU 17 is a part that handles a large amount of electric power as compared with the electric power of the electric compressor 25, the strength of the PCU 17 is set larger than the strength of the electric compressor 25. As a result, the electric compressor 25 provided in the PCU 17 is less likely to be damaged compared to the conventional case at the time of a vehicle collision without fear of electric leakage from the traveling system energized portion, and the electric leakage caused by the electric compressor 25 being damaged. Can be prevented.
(2) The electric compressor 25 is provided on the rear surface 18A of the outer wall portion of the PCU case 18 that protects the PCU body. Therefore, the electric compressor 25 can be provided on the outer wall portion of the PCU case 18 simply by providing the mounting seat 22 on the outer wall portion of the PCU case 18, and the mounting structure between the outer wall rear surface 18A of the housing and the electric compressor 25 is provided. Be simple.
(3) Since the electric compressor 25 is provided on the rear surface 18A of the outer wall portion of the PCU case 18 that protects the PCU body, the electric compressor 25 is similar to the PCU body 18 protected by the PCU case 18. Protected according to the strength of. In a state where the PCU case 18 is not damaged, the electric compressor 25 is less likely to be damaged.

(4) Since the electric compressor 25 is provided on the rear surface 18 </ b> A of the outer wall portion of the PCU case 18, the electric compressor 25 is not easily damaged against a collision that damages the front portion of the vehicle. Further, since only the mounting seat 22 and the bolt hole are formed in the PCU case 18, compared with the case where the electric compressor 25 is provided inside the PCU case, the electric compression can be performed without significantly changing the shape of the PCU case. The machine 25 can be placed in the PCU case 18.
(5) When the electric compressor 25 is provided in the PCU case 18, the electric compressor 25 is less susceptible to the vibration and heat of the engine 14 than when the electric compressor 25 is installed in the engine 14. . Since vibration countermeasures and heat countermeasures for the electric compressor 25 can be reduced, for example, the electric compressor 25 can be reduced in weight and size. Further, the wiring connecting the electric compressor 25 and the PCU 17 can be shortened.
(6) When the electric compressor 25 is provided on the outer wall portion rear surface 18 </ b> A of the PCU case 18, the degree of freedom in handling the refrigerant pipe connected to the electric compressor 25 is high. Cooling of the PCU case 18 can be promoted by bringing a pipe through which a low-temperature refrigerant flows into contact with the PCU case 18 or attaching the housing 30 of the electric compressor 25 in direct contact with the PCU case 18.

(Second Embodiment)
Next, the arrangement structure of the electric compressor according to the second embodiment will be described.
In the arrangement structure of the electric compressor according to the second embodiment, the electric compressor is installed inside the PCU case.
Accordingly, since the difference between the second embodiment and the first embodiment is only the difference in the PCU, the description of the above-described embodiment will be omitted for the common configuration, and the above description will be omitted. The codes used in the above are used in common.

As shown in FIG. 4, the PCU 60 includes a PCU main body as a control unit main body composed of electronic components such as semiconductors and substrates, and a PCU case 61 as a housing in which the PCU main body is built.
The PCU main body is mainly composed of an inverter 62 that controls conversion from DC power to AC power of a battery, a battery voltage booster circuit 63 that boosts the battery voltage, and a voltage smoothing capacitor (capacitor) 64.
The inverter 62 includes a plurality of switching elements such as IGBTs.
The PCU body is connected to a power cable (not shown) connected to the stator of the traveling electric motor 16 and a power cable (not shown) connected to the battery.

The PCU case 61 is a box with a lid formed of an aluminum-based material, and the PCU case 61 is fixed to the frame and the traveling electric motor 16 so as to be located closer to the rear of the upper portion of the traveling electric motor 16. ing.
The PCU case 61 of this embodiment includes an internal space having a volume in which the electric compressor 25 can be housed in addition to the PCU body.
On the inner wall rear surface 61A of the PCU case 61, a mounting seat 65 for installing the electric compressor 25 is formed in addition to a mounting seat (not shown) of the PCU body.
A screw hole (not shown) is formed in the mounting seat 65, and a fixing bolt inserted through the boss portions 31 to 33 of the electric compressor 25 is screwed into the screw hole.
The electric compressor 25 is fixed to the rear surface 61A of the inner wall portion of the PCU case 61 with fixing bolts.
In this embodiment, the electric compressor 25 is provided on the rear wall 61A of the inner wall portion of the PCU case 61. However, as long as the inner wall portion of the PCU case 61 is provided, it may be provided on the front surface, right surface, left surface, bottom surface, and ceiling surface. .
Although not shown, the PCU case 61 is formed with a through hole through which a refrigerant pipe for suction and discharge is passed.

According to the arrangement structure of the electric compressor of this embodiment, since the electric compressor 25 is built in the PCU case 61, the strength of the PCU case 61 is improved without improving the strength of the electric compressor 25. Thus, the electric compressor 25 can be protected.
Further, by incorporating the PCU body and the electric compressor 25 in the PCU case 61, the control unit case 51 can be omitted from the electric compressor 25 if the inverter 62 and the capacitor 64 are protected by the PCU case 61. .

In addition, the arrangement structure of the electric compressor according to the first and second embodiments described above shows one embodiment of the present invention, and the present invention is limited to the first and second embodiments. Instead, various modifications can be made within the scope of the invention as described below.
In the first and second embodiments described above, examples of hybrid vehicles have been described, but the present invention can also be applied to electric vehicles. In the case of an electric vehicle, as shown in FIG. 5, a traveling electric motor 73 is installed in a motor room 72 in front of a passenger room 71 of the electric vehicle 70. The traveling electric motor 73 is provided with a PCU 74 as a power control unit on the rear side. The PCU 74 includes a PCU case 75 as a housing and a PCU body (an inverter, a battery voltage booster circuit, a smoothing capacitor, etc.) installed in the PCU case 75. The electric compressor 25 is provided on the outer wall rear surface 75 </ b> A of the PCU case 75. In this case, like the hybrid vehicle, the electric compressor 25 is less likely to be damaged than before. In addition to providing the electric compressor 25 on the outer wall portion of the PCU case 75, the electric compressor 25 may be provided in the PCU case 75.
In the first and second embodiments described above, the capacitor of the electric motor for traveling and the capacitor of the electric compressor are provided separately, but the circuit related to the capacitor may be shared and the capacitor may be shared. . In this case, it is possible to reduce the installation space of the capacitor and to omit and shorten the wiring.
In the first and second embodiments described above, the scroll type electric compressor is described as the electric compressor. However, the type and form of the compressor are not limited as long as the electric compressor is used. For example, a swash plate type electric compressor or a vane type electric compressor may be used.
In the above first embodiment, the electric compressor is provided on the rear surface of the outer wall portion of the PCU case. However, the electric compressor may be provided on the right surface of the outer wall portion on the motor generator side. Also in this case, substantially the same effect can be obtained as when the electric compressor is provided on the rear surface of the outer wall of the PCU case. When the electric compressor is provided on the outer wall portion of the PCU case, it is preferable that the electric compressor is provided on the outer wall portion where the electric compressor is hardly damaged at the time of a vehicle collision. A portion other than the front surface of the outer wall portion or the side surface of the outer wall portion closer to the vehicle frame and the side member is an outer wall portion where the electric compressor is hardly damaged.

DESCRIPTION OF SYMBOLS 10 Hybrid vehicle 12, 70 Motor room 13 Power unit 14 Engine 15 Motor generator 16, 73 Traveling electric motor 17, 60, 74 PCU
18, 61, 75 PCU cases 18A, 75A outer wall rear surface 19 inverter 20 battery voltage booster circuit 21 capacitor 25 electric compressor 31 boss portion 32 boss portion 33 boss portion 36 compression mechanism 45 electric motor 61A for compressor inner wall rear surface 62 inverter 70 electric car

Claims (3)

A traveling electric motor is installed as one of the traveling drive sources in the motor room in the vehicle,
In the arrangement structure of the electric compressor in which the electric compressor in which the compression mechanism that compresses the fluid and the electric motor for the compressor that drives the compression mechanism are integrated is arranged in the motor room,
A power control unit for controlling the driving power of the electric motor for traveling is provided on the electric motor for traveling;
An arrangement structure of an electric compressor, wherein the electric compressor is provided in the power control unit. The power control unit includes a control unit main body having electronic components, and a housing that covers the control unit main body,
The arrangement structure of the electric compressor according to claim 1, wherein the electric compressor is provided on an outer wall portion of the casing. The power control unit includes a control unit main body having electronic components, and a housing that covers the control unit main body,
The arrangement structure of the electric compressor according to claim 1, wherein the electric compressor is provided on an inner wall portion of the casing.