JP2021173161A - On-vehicle motor compressor - Google Patents

Abstract

To provide an on-vehicle motor compressor capable of protecting an invertor while suppressing damage to a communication connector during collision.SOLUTION: In an on-vehicle motor compressor 10, a communication connector 45 is protruded from an outer face 21b while penetrating through an invertor cover 20. The invertor cover 20 has a swollen part 25 swollen from the outer face 21b in the protrusion direction of the communication connector 45. A height H2 of the swollen part 25 in the protrusion direction of the communication connector 45 is greater than a height H3 of the communication connector 45. The swollen part 25 covers part of the communication connector 45 in the vicinity of the communication connector 45.SELECTED DRAWING: Figure 2

Description

The present invention relates to an in-vehicle electric compressor.

The in-vehicle electric compressor includes a compression unit that compresses a fluid, an electric motor that drives the compression unit, an inverter that drives the electric motor, and a housing that houses the compression unit, the electric motor, and the inverter.

The inverter is provided with a connector for communication with the outside in order to communicate with the upper ECU on the vehicle side. The communication connector is electrically connected to the low voltage circuit of the circuit board of the inverter via the low voltage wiring. Further, a high-voltage connector is electrically connected to the circuit board of the inverter via a high-voltage wiring that is electrically connected to the in-vehicle battery.

As shown in FIG. 5, for example, the in-vehicle electric compressor 90 described in Patent Document 1 includes an inverter accommodating portion 92 on the upper outer periphery of the motor housing main body 91 and a lid that closes the opening of the inverter accommodating portion 92. 93 is provided. An inverter circuit (not shown) is accommodated between the inverter accommodating portion 92 and the lid 93. Further, the in-vehicle electric compressor 90 is provided with a terminal block 94, which is a high-voltage connector, at the tip of a portion protruding from the upper part of the lid 93, and a control communication cable 95, which is a communication connector, is provided in the motor housing main body 91. Prepare for the side of.

Japanese Unexamined Patent Publication No. 2016-220424

However, in the in-vehicle electric compressor 90 of Patent Document 1, when the vehicle collides, the body deformed due to the collision and other parts arranged around the in-vehicle electric compressor 90 are the lid 93 and the terminal. There is a risk of collision with the cable of the base 94 and the control communication cable 95 or the connector portion at the tip of the cable. Further, when a vehicle collides, it is always desired to protect the inverter circuit by the lid 93.

An object of the present invention is to provide an in-vehicle electric compressor capable of suppressing damage to a communication connector at the time of a collision and protecting an inverter.

An in-vehicle electric compressor for solving the above problems includes a compression unit for compressing fluid, a rotating shaft, an electric motor for driving the compression unit, and a connector for communication with the outside, and the electric motor. It is made of metal that includes an inverter for controlling the inverter, a compression unit accommodating chamber for accommodating the compression unit, a motor accommodating chamber for accommodating the electric motor, and an inverter accommodating chamber for accommodating the inverter, and closes the opening of the inverter accommodating chamber. An in-vehicle electric compressor having a housing having an inverter cover, wherein the communication connector penetrates the inverter cover and projects from the outer surface of the inverter cover, and the inverter cover is the inverter. The height of the bulging portion from the outer surface of the inverter cover in the protruding direction of the communication connector is the height of the bulging portion with respect to the outer surface of the cover in the protruding direction of the communication connector. It is intended that the height of the communication connector is higher than the height of the communication connector from the outer surface of the cover, and the bulge covers at least a part of the communication connector in the vicinity of the communication connector.

According to this, for example, as compared with the case where the inverter cover does not have the bulging portion, the rigidity of the inverter cover can be increased by increasing the plate thickness of the inverter cover by the bulging portion. In addition, when a part of the body or other parts collide with the inverter cover along the protruding direction of the communication connector at the time of collision, the part of the body or other parts collide with the bulging part prior to the communication connector. It is easy to prevent a part of the body or other parts from colliding with the communication connector. Since the inverter cover has increased rigidity as described above, the inverter cover is prevented from being deformed by the collision, and the inverter housed in the inverter accommodating chamber can be protected from the collision.

Regarding the in-vehicle electric compressor, the inverter has a circuit board to which the communication connector is connected via low voltage wiring and a circuit board connected to the circuit board via high voltage wiring, rather than the communication connector. A high-voltage connector to which a high voltage is applied is provided, and the high-voltage connector penetrates the inverter cover and is exposed to the outside of the inverter cover, and is exposed from the outer surface of the inverter cover in the protruding direction. The height of the bulging portion may be higher than the height of the high voltage inverter.

According to this, when a part of the body or another part collides with the inverter cover along the protruding direction of the communication connector at the time of a collision, the part of the body or another part bulges ahead of the high voltage connector. It is easy to collide with the part, and it is possible to prevent a part of the body or other parts from colliding with the high voltage connector.

The in-vehicle electric compressor is provided with a through hole through which the high voltage wiring is inserted in the bulging portion, and the high voltage connector is directed from a part of the bulging portion in a direction different from the protruding direction. It is protruding.

According to this, the portion of the bulging portion located between the through hole and the communication connector can function as a shield for flowing noise from the high voltage wiring to the ground. Therefore, it is possible to suppress the emission of noise by the bulging portion, and it is possible to suppress the noise from reaching the communication connector.

Regarding the in-vehicle electric compressor, the high-voltage connector may have a connection port into which the vehicle-side connector is inserted and removed, and the connection port may be opened downward in the direction of gravity.
According to this, it is possible to suppress the invasion of foreign matter into the connection port.

Regarding an in-vehicle electric compressor, the circuit board has a high voltage region in which a high voltage circuit is formed and the high voltage connector is electrically connected, and a low voltage circuit is formed and the communication connector is electrically connected. The high-voltage wiring and the high-voltage connector overlap with the high-voltage region, and the low-voltage wiring and the communication connector are said to be low in the axial view of the rotating shaft. It may overlap with the voltage region.

According to this, the influence of the noise radiated from the high voltage circuit on the low voltage circuit can be further suppressed.
Regarding an in-vehicle electric compressor, the inverter cover has a peripheral wall that protrudes from the peripheral edge in a direction opposite to the protruding direction of the communication connector, and a part of the bulging portion is on the same surface as the outer peripheral surface of the peripheral wall. It may be located.

According to this, for example, as compared with the case where there is a step between a part of the bulging portion and the outer peripheral surface of the peripheral wall, the area of the portion connecting the bulging portion and the outer peripheral surface of the peripheral wall can be increased, and the rigidity can be increased. Can be enhanced.

For an in-vehicle electric compressor, the bulging portion may be arranged inside the outer peripheral surface of the peripheral wall in the axial direction of the rotating shaft.
According to this, the electric compressor does not become large in the configuration in which the bulging portion is provided on the inverter cover.

According to the present invention, damage to the communication connector at the time of collision can be suppressed and the inverter can be protected.

The perspective view which shows typically the vehicle-mounted electric compressor of an embodiment. The side view which shows the vehicle-mounted electric compressor of an embodiment. Sectional drawing which shows an inverter cover and an inverter. FIG. 6 is an axial view showing an in-vehicle electric compressor of the embodiment. The figure which shows the background technology.

Hereinafter, an embodiment embodying an in-vehicle electric compressor will be described with reference to FIGS. 1 to 4. In the in-vehicle electric compressor of the present embodiment, hydrogen discharged from a fuel cell that generates power by chemically reacting hydrogen as a fuel gas and oxygen contained in air as an oxidizing agent gas is circulated while being slightly compressed. It is used as a pump to supply the fuel cell again. The in-vehicle electric compressor of the present embodiment is mounted on a fuel cell vehicle as a vehicle powered by a fuel cell. In the following description, "front", "rear", "left", "right", "up", and "down" mean that the driver of the fuel cell vehicle faces forward (forward direction). It means "front", "rear", "left", "right", "top", and "bottom" when used as a reference. Further, the in-vehicle electric compressor is simply referred to as "electric compressor".

As shown in FIG. 1 or 2, the electric compressor 10 includes a compression unit accommodating part 11 and a compression unit 12 accommodating in the compression unit accommodating part 11. The compression unit accommodating part 11 has a bottomed cylinder shape including a suction port 11a and a discharge port 11b. The compression unit 12 slightly compresses hydrogen as a fluid sucked from the suction port 11a and discharges it from the discharge port 11b.

The electric compressor 10 includes an electric motor 13 for driving the compression unit 12 and a motor accommodating part 14 for accommodating the electric motor 13. The motor accommodating part 14 has a bottomed cylindrical shape. The rear end portion of the motor accommodating part 14 in the front-rear direction is attached to the compression portion accommodating part 11, and the front end portion of the motor accommodating part 14 in the front-rear direction is attached to the water jacket 16. The rear end of the motor accommodating part 14 is the bottom portion of the motor accommodating part 14. Then, the opening of the compression portion accommodating part 11 is closed by the rear end portion of the motor accommodating part 14, and the compression portion accommodating chamber S1 is defined between the compression portion accommodating part 11 and the rear end portion of the motor accommodating part 14. There is.

The rear end portion of the water jacket 16 in the front-rear direction is attached to the front end portion of the motor accommodating part 14. The opening at the front end of the motor accommodating part 14 is closed by the rear end of the water jacket 16, and the motor accommodating chamber S2 is defined between the motor accommodating part 14 and the water jacket 16. Further, the front end portion of the water jacket 16 in the front-rear direction is attached to the rear end portion of the inverter cover 20. The electric compressor 10 includes an inverter 30 that controls the electric motor 13 and an inverter cover 20 that defines an inverter storage chamber 19 in which the inverter 30 is housed.

The inverter cover 20 is attached to the front end portion of the water jacket 16. In the present embodiment, the compression unit accommodating part 11, the motor accommodating part 14, the water jacket 16, and the inverter cover 20 are integrated to form the housing H. An inverter accommodating chamber 19 is defined at the front end of the water jacket 16, and the opening of the inverter accommodating chamber 19 is closed by the inverter cover 20.

The electric motor 13 includes a rotating shaft 17. The electric motor 13 drives the compression unit 12. The rear end portion, which is one end portion of the rotating shaft 17, protrudes into the compression portion accommodating part 11. A compression portion 12 is provided at a portion of the rotating shaft 17 that protrudes into the compression portion accommodating part 11. The compression unit 12 is driven as the rotating shaft 17 rotates. The direction along the central axis L of the rotating shaft 17 is defined as the axial direction. The axial direction of the rotating shaft 17 coincides with the plate thickness direction of the water jacket 16 and coincides with the front-rear direction. Hereinafter, the axial direction and the plate thickness direction will be described as the front-rear direction.

The electric compressor 10 is arranged in the order of the compression unit accommodating part 11, the motor accommodating part 14, the water jacket 16, and the inverter cover 20 from the rear to the front in the front-rear direction. The compression unit accommodating part 11, the motor accommodating part 14, the water jacket 16, and the inverter cover 20 are made of metal. The electric compressor 10 is mounted on the fuel cell vehicle so that the central axis L of the rotating shaft 17 extends in the front-rear direction. Then, the electric compressor 10 is mounted on the fuel cell vehicle so that the inverter cover 20 is located at the front end. The housing H of the electric compressor 10 is electrically connected to the body of the fuel cell vehicle and is grounded.

Cooling water flows inside the water jacket 16. A cooling water introduction pipe 16a is provided at the upper right end side of the water jacket 16. The central axis of the introduction pipe 16a extends in the front-rear direction. A cooling water outlet pipe 16b is provided at the lower right end side of the water jacket 16. Then, the cooling water is introduced into the water jacket 16 from the introduction pipe 16a, and the cooling water flowing through the water jacket 16 is led out from the outlet pipe 16b to the outside of the water jacket 16. The inverter 30 is cooled by heat exchange between the cooling water flowing in the water jacket 16 and the inverter 30.

As shown in FIG. 3, a frame portion 18a projecting from the front end portion of the water jacket 16 in a substantially square cylinder shape toward the inverter cover 20 is provided. A storage recess 18b is defined inside the frame portion 18a of the water jacket 16.

As shown in FIG. 4, assuming that the view of the electric compressor 10 along the axial direction of the rotating shaft 17 is taken as an axial view, in the axial view of the electric compressor 10, the outer shape of the water jacket 16 is a frame portion. It is formed by the outer peripheral surface 18c of 18a and has a substantially quadrangular shape.

The inverter cover 20 is attached to the front end of the frame portion 18a of the water jacket 16. Here, as shown in FIG. 2, a virtual line in which the central axis L of the rotating shaft 17 is extended toward the inverter cover 20 is referred to as an extension line M. Since the extension line M is an extension line of the central axis L, it extends in the front-rear direction. The inverter cover 20 has a lid plate 21 having an inner surface 21a and an outer surface 21b orthogonal to the extension line M, and a peripheral wall 22 protruding from the peripheral edge of the lid plate 21 toward the water jacket 16 in the front-rear direction. In the axial view of the electric compressor 10, the outer shape of the inverter cover 20 is formed by the outer peripheral surface of the peripheral wall 22 and has a substantially quadrangular shape.

The inverter cover 20 has an accommodating portion 23 in a portion surrounded by the lid plate 21 and the peripheral wall 22. The inverter cover 20 and the water jacket 16 are attached in a state where the rear end surface of the peripheral wall 22 and the front end surface of the frame portion 18a are abutted against each other. An inverter accommodating chamber 19 is defined by an accommodating recess 18b and an accommodating portion 23 between the water jacket 16 and the inverter cover 20 in the front-rear direction.

The inverter 30 is housed in the inverter storage chamber 19. Therefore, in the electric compressor 10, the compression unit 12, the electric motor 13, the water jacket 16, and the inverter 30 are arranged side by side in this order from the rear to the front in the front-rear direction.

As shown in FIG. 3, in the lid plate 21, the surface facing the inverter accommodating chamber 19 is referred to as the inner surface 21a, and the surface exposed to the outside of the inverter cover 20 is referred to as the outer surface 21b. The inner surface 21a and the outer surface 21b are located at opposite positions with the lid plate 21 sandwiched in the front-rear direction. Further, the plate thickness direction of the lid plate 21 coincides with the front-rear direction. That is, the dimension from the inner surface 21a to the outer surface 21b in the front-rear direction is defined as the plate thickness.

The lid plate 21 has a lid main body 24 which is a portion of the first plate thickness D1 having the thinnest plate thickness and a bulging portion which is a portion of the second plate thickness D2 having a plate thickness thicker than the first plate thickness D1 and the thickest plate thickness D2. 25 and a connector support portion 26 which is a portion of a third plate thickness D3 whose plate thickness is thicker than the first plate thickness D1 and thinner than the bulging portion 25.

As shown in FIG. 1 or 4, in the axial view of the electric compressor 10, the bulging portion 25 has a substantially L shape and is arranged inside the outer peripheral surface of the peripheral wall 22 of the inverter cover 20. The bulging portion 25 has first to sixth standing surfaces 25a to 25f rising from the lid main body 24. The first upright surface 25a is a surface continuous with a part of the upper outer surface 22a as a part of the peripheral wall 22. Therefore, the first upright surface 25a is located on the same surface as the upper outer surface 22a which is a part of the outer peripheral surface of the peripheral wall 22. When the electric compressor 10 is viewed from above, the upper outer surface 22a and the first standing surface 25a are each rectangular.

The second upright surface 25b is a surface that extends downward from the right end of the first upright surface 25a in the left-right direction and rises from the lid main body 24. The third upright surface 25c is a surface that extends downward from the left end of the first upright surface 25a in the left-right direction and rises from the lid main body 24. The dimension of the second vertical surface 25b in the vertical direction is smaller than the dimension of the third vertical surface 25c in the vertical direction.

The fourth erection surface 25d is a surface that extends obliquely from the lower end of the second erection surface 25b toward the third erection surface 25c and rises from the lid main body 24. The fifth erection surface 25e is a surface that extends downward from the lower end of the fourth erection surface 25d and rises from the lid main body 24. The sixth upright surface 25f is a surface that connects the lower end of the third upright surface 25c and the lower end of the fifth upright surface 25e, extends in the left-right direction, and rises from the lid main body 24. The first to sixth erection surfaces 25a to 25f are all flat surfaces. Further, the bulging portion 25 includes a front end surface 25g which is a tip of the first to sixth upright surfaces 25a to 25f.

The electric compressor 10 includes a high-voltage connector 41 installed on the sixth vertical surface 25f of the bulging portion 25. That is, the high voltage connector 41 protrudes from a part of the bulging portion 25, penetrates the inverter cover 20, and is exposed to the outside of the lid plate 21. The vehicle-side connector 40 is inserted into and removed from the high-voltage connector 41.

The high voltage connector 41 has a square cylinder made of an insulating material. In the high voltage connector 41, the rear end surface in the front-rear direction is the first connector surface 41a, and the front end surface in the front-rear direction is the second connector surface 41b. Further, in the high voltage connector 41, the right end surface in the left-right direction is the third connector surface 41c, and the left end surface in the left-right direction is the fourth connector surface 41d.

As shown in FIG. 2, viewing the electric compressor 10 from the left end side or the right end side in the left-right direction is defined as a side view. Then, in the side view, the height H1 of the high voltage connector 41 is set from the outer surface 21b of the lid main body 24 on the lid plate 21 to the second connector surface 41b of the high voltage connector 41 along the front-rear direction, and the lid plate 21. The height H2 is from the outer surface 21b of the lid body 24 to the front end surface 25g of the bulging portion 25 along the front-rear direction. The height H2 of the bulging portion 25 is higher than the height H1 of the high voltage connector 41. That is, the second connector surface 41b of the high voltage connector 41 is located at a position recessed from the front end surface 25g of the bulging portion 25. Therefore, when viewed from the side of the electric compressor 10, the high voltage connector 41 does not protrude forward from the bulging portion 25.

As shown in FIG. 4, in the axial view of the electric compressor 10, the third connector surface 41c of the high voltage connector 41 is located inside the fifth erecting surface 25e of the bulging portion 25 and has a high voltage. The fourth connector surface 41d of the connector 41 is located inside the third vertical surface 25c of the bulging portion 25. Therefore, the high voltage connector 41 is located within the width of the bulging portion 25 and does not protrude from the bulging portion 25.

As shown in FIG. 1, the high voltage connector 41 has a connection port 42 into which the vehicle-side connector 40 is inserted / removed. The connection port 42 is surrounded by the lower ends of the first to fourth connector surfaces 41a to 41d. Therefore, the connection port 42 opens downward in the direction of gravity, and the insertion / removal direction of the vehicle-side connector 40 with respect to the connection port 42 is orthogonal to the front-rear direction.

As shown in FIG. 3, the bulging portion 25 is provided with a through hole 43 through which the high voltage wiring 44 is inserted. The first end of the deformable cable-shaped high-voltage wiring 44 is electrically connected to the high-voltage connector 41, and the second end of the high-voltage wiring 44 is electrically connected to the high-voltage circuit of the circuit board 31 described later. It is connected.

As shown in FIG. 1 or 4, the communication connector 45 penetrates the connector support portion 26 of the inverter cover 20 and projects. In the present embodiment, the protruding direction of the communication connector 45 with respect to the outer surface 21b of the lid main body 24 is the front-rear direction. That is, the protruding direction of the lid main body 24 from the outer surface 21b coincides with the bulging portion 25 and the communication connector 45.

Further, the protruding direction of the high voltage connector 41 from the bulging portion 25 is different from the protruding direction of the communication connector 45 from the outer surface 21b of the lid main body 24. That is, the high-voltage connector 41 protrudes downward from the sixth upright surface 25f, which is a part of the bulging portion 25, and is in the front-rear direction which is the protruding direction from the connector support portion 26 of the communication connector 45. It protrudes in different directions. In the above-mentioned inverter cover 20, the peripheral wall 22 protrudes from the lid plate 21 in the direction opposite to the protruding direction of the communication connector 45 from the lid plate 21.

The communication connector 45 is supported by the connector support portion 26. The connector support portion 26 has a quadrangular shape. The connector support portion 26 has a first side surface 26a located below the fourth standing surface 25d of the bulging portion 25 in the axial direction, and a second side surface 26b extending downward from the right end of the first side surface 26a in the left-right direction. A third side surface 26c extending downward from the left end of the first side surface 26a in the left-right direction, and a fourth side surface 26d connecting the lower ends of the second side surface 26b and the third side surface 26c. The first to fourth side surfaces 26a to 26d are all flat surfaces.

In the axial view of the electric compressor 10, the first side surface 26a of the connector support portion 26 faces the fourth erection surface 25d and the fifth erection surface 25e of the bulging portion 25 in the vertical direction. That is, the fourth erection surface 25d and the fifth erection surface 25e of the bulging portion 25 face the first side surface 26a in the direction orthogonal to the extension line M. The fourth erection surface 25d and the fifth erection surface 25e of the bulging portion 25 cover the first side surface 26a of the connector support portion 26.

A part of the third side surface 26c of the connector support portion 26 faces the fifth standing surface 25e of the bulging portion 25 in the left-right direction. That is, the fifth erection surface 25e of the bulging portion 25 faces the third side surface 26c in the direction orthogonal to the extension line M. The fifth erecting surface 25e of the bulging portion 25 covers the third side surface 26c of the connector supporting portion 26.

The electric compressor 10 includes a communication connector 45 supported by the connector support portion 26. Therefore, the communication connector 45 is exposed from the lid plate 21. The communication connector 45 is connected to the outside via a vehicle-side communication connector connected to a vehicle-side upper ECU.

The communication connector 45 has a square frame-shaped mounting portion 46 supported by the connector supporting portion 26, and a connector portion 47 protruding forward from the inner peripheral edge of the mounting portion 46 in a cylindrical shape. The mounting portion 46 is located within the frame of the connector supporting portion 26. That is, the peripheral edge of the mounting portion 46 is located inside the first to fourth side surfaces 26a to 26d of the connector supporting portion 26. The mounting portion 46 is fixed to the connector supporting portion 26 with bolts B. The fourth erection surface 25d and the fifth erection surface 25e of the bulging portion 25 described above cover a part of the communication connector 45 in the vicinity of the communication connector 45.

The tip of the connector portion 47 in the protruding direction from the mounting portion 46 is defined as the front end 47a of the connector portion 47. The position of the front end 47a of the connector portion 47 from the outer surface 21b of the lid main body 24 on the lid plate 21 along the front-rear direction is defined as the height H3 of the communication connector 45. In the side view of the electric compressor 10, the height H2 of the bulging portion 25 from the outer surface 21b of the lid main body 24 in the protruding direction of the communication connector 45 from the outer surface 21b of the lid main body 24 in the lid plate 21, that is, the front-rear direction is , The height H3 of the communication connector 45 from the outer surface 21b of the lid main body 24, and the height H1 of the high voltage connector 41. That is, in the side view of the electric compressor 10, the communication connector 45 is in a position recessed from the bulging portion 25 and the high voltage connector 41.

The communication connector 45 has a connection port 48 to which the vehicle-side communication connector is connected. The connection port 48 opens toward the front. The vehicle-side communication connector is inserted and removed from the connection port 48 in the front-rear direction.

As shown in FIG. 3, a low-voltage wiring passage 49 communicating with the communication connector 45 is provided inside the connector support portion 26. A low-voltage wiring 50 made of a bus bar module obtained by molding a plurality of bus bars with a resin is wired in the low-voltage wiring passage 49. The first end of the low voltage wiring 50 is electrically connected by being crimped and fixed to the communication connector 45. The second end of the low-voltage wiring 50 is electrically connected by being soldered to the pattern of the low-voltage circuit of the circuit board 31, which will be described later. Therefore, the inverter 30 includes a circuit board 31 in which the communication connector 45 is connected via the low voltage wiring 50, and a high voltage connector 41 in which the communication connector 45 is connected to the circuit board 31 via the high voltage wiring 44. ing. A higher voltage is applied to the high voltage connector 41 than to the communication connector 45.

As shown in FIG. 4, in the axial view of the electric compressor 10, the high voltage connector 41 and the communication connector 45 are arranged in a region surrounded by the outer peripheral surface of the peripheral wall 22 and the outer peripheral surface 18c of the water jacket 16. ing. That is, the high-voltage connector 41 and the communication connector 45 do not protrude from the inverter cover 20 and the water jacket 16 in all directions of up, down, left, and right as directions orthogonal to the extension line M.

As shown in FIG. 3 or 4, the circuit board 31 is housed in the inverter housing chamber 19. The substrate main surface 31a of the circuit board 31 has a high voltage region R1 in which a high voltage circuit is formed and the high voltage connector 41 is electrically connected, and a low voltage circuit is formed and the communication connector 45 is electrically connected. It includes a low voltage region R2 to be connected. The high-voltage circuit is a circuit for converting a DC voltage from a high-voltage power source into an AC voltage and applying the AC voltage as a drive voltage to the electric motor 13. The low-voltage circuit is a circuit for receiving a signal from a higher-level ECU on the vehicle side and outputting a signal for controlling the drive of the electric motor 13.

In the axial view of the electric compressor 10, the high voltage wiring 44 and the high voltage connector 41 overlap the high voltage region R1, and the low voltage wiring 50 and the communication connector 45 overlap the low voltage region R2.

In the axial view of the electric compressor 10, the fifth upright surface 25e of the bulging portion 25 is located near the boundary between the high voltage wiring 44 and the low voltage wiring 50. Therefore, the portion of the bulging portion 25 forming the fifth upright surface 25e is interposed between the high voltage wiring 44 and the low voltage wiring 50. Therefore, in the portion of the bulging portion 25 along the fifth vertical surface 25e, the noise from the high voltage wiring 44 flows to the ground, and the noise associated with the application of the voltage to the high voltage wiring 44 is a low voltage. It functions as a shield that prevents entry into the wiring 50.

Next, the operation and effect of the electric compressor 10 will be described.
(1) For example, as compared with the case where the lid plate 21 of the inverter cover 20 is composed of only the lid main body 24 having the first plate thickness D1, the lid plate 21 provided with the bulging portion 25 having the second plate thickness D2 is better. Rigidity can be increased. Then, when a part of the body or another part collides with the lid plate 21 of the inverter cover 20 at the time of a vehicle collision, the part of the body or the other part collides with the bulging portion 25 prior to the communication connector 45. It is easy to prevent a part of the body or other parts from colliding with the communication connector 45. Since the lid plate 21 is increased in rigidity by the bulging portion 25 as described above, the lid plate 21 is suppressed from being deformed by the collision, and the inverter 30 housed in the inverter accommodating chamber 19 is protected from the collision. can. As a result, in order to protect the inverter 30 in the event of a collision, a bulging portion 25 having a thickened lid plate 21 is provided, and by using the bulging portion 25, communication arranged on the lid plate 21 is performed. Damage to the connector 45 can also be suppressed.

(2) The height H2 of the bulging portion 25 is higher than the height H1 of the high voltage connector 41. Therefore, at the time of collision, a part of the body and other parts collide with the bulging portion 25 prior to the high voltage connector 41, so that the part of the body and other parts collide with the high voltage connector 41. It can be suppressed, and damage to the high voltage connector 41 can be suppressed.

(3) The inverter cover 20 is provided with a through hole 43 in the bulging portion 25, and the through hole 43 is provided inside the bulging portion 25 along the fifth standing surface 25e facing the communication connector 45. Therefore, the noise from the high voltage wiring 44 can flow to the ground by the portion of the bulging portion 25 located between the through hole 43 and the communication connector 45. As a result, it is possible to suppress the radiation of noise from the high voltage wiring 44, and it is possible to suppress the noise from reaching the communication connector 45.

(4) In the inverter cover 20, the upper outer surface 22a of the peripheral wall 22 and the first standing surface 25a of the bulging portion 25 are located on the same surface. For example, the area of the first erecting surface 25a can be increased as compared with the case where there is a step between the first erecting surface 25a of the bulging portion 25 and the outer peripheral surface of the peripheral wall 22, and the outer peripheral surface of the peripheral wall 22 can be increased. The rigidity of the bulging portion 25 at the connecting portion can be increased.

(5) In order to cause a part of the body or other parts to collide with the bulging portion 25 prior to the high voltage connector 41 at the time of collision, the height H1 of the high voltage connector 41 is set to the height of the bulging portion 25. It is lower than H2. In this configuration, the insertion / removal direction of the vehicle-side connector 40 with respect to the connection port 42 of the high-voltage connector 41 is a direction orthogonal to the extension line M, but the connection port 48 is opened downward in the direction of gravity. Therefore, in a configuration that can suppress damage to the high voltage connector 41 at the time of a collision, it is possible to suppress foreign matter from entering the high voltage connector 41 from the connection port 48.

(6) In the axial view of the electric compressor 10, the bulging portion 25 is arranged inside the outer peripheral surface of the peripheral wall 22 of the inverter cover 20. Therefore, in the configuration in which the bulging portion 25 is provided on the inverter cover 20, the electric compressor 10 does not become large in the vertical and horizontal directions.

(7) The high voltage connector 41 and the communication connector 45 are preferably arranged together on the lid plate 21 in view of the positional relationship with other parts around the electric compressor 10. When the high-voltage connector 41 and the communication connector 45 are arranged on the lid plate 21, the influence of noise due to the high-voltage wiring 44 electrically connected to the high-voltage connector 41 is suppressed from affecting the communication connector 45. There is a need. By providing the bulging portion 25 on the lid plate 21 and interposing it between the high voltage wiring 44 and the communication connector 45, the bulging portion 25 is used to exert a shielding function, and the rigidity of the lid plate 21 is also improved. Furthermore, damage to the communication connector 45 can be suppressed. Therefore, the bulging portion 25 does not simply increase the thickness of the lid plate 21, but protects the inverter 30 while exerting a shielding function by appropriately setting the position and height of the bulging portion 25. Furthermore, damage to the communication connector 45 can be suppressed.

(8) By making the height H2 of the bulging portion 25 higher than the height H1 of the high voltage connector 41, it is possible to prevent the high voltage connector 41 from short-circuiting with the body at the time of a collision. Therefore, it is not necessary to provide the electric compressor 10 with a protective cover for preventing the high voltage connector 41 and the body from being short-circuited in the event of a collision, and the number of parts of the electric compressor 10 can be reduced.

(9) By making the height H2 of the bulging portion 25 higher than the height H3 of the communication connector 45, it is possible to prevent the communication connector 45 from being damaged in the event of a collision. Therefore, it is possible to avoid being unable to receive the control signal from the upper ECU on the vehicle side to the electric compressor 10 at the time of a collision, and to circulate the hydrogen gas from the electric compressor 10 to the fuel cell at the time of a collision. ..

(10) The electric compressor 10 integrally includes a water jacket 16, and the high voltage connector 41 and the communication connector 45 do not protrude from the outer peripheral surface 18c of the water jacket 16 in all directions of up, down, left, and right. The outlet pipe 16b of the water jacket 16 is located below the high voltage connector 41 and the communication connector 45. Therefore, even if an impact from below the fuel cell vehicle is applied to the electric compressor 10, the water jacket 16, particularly the lead-out pipe 16b, can protect the high-voltage connector 41 and the communication connector 45.

(11) In the axial view of the electric compressor 10, the bulging portion 25 has a substantially L shape in which two surfaces, the fourth erection surface 25d and the fifth erection surface 25e, face the communication connector 45. Therefore, the bulging portion 25 can increase the rigidity of the bulging portion 25 as compared with the front view I shape.

(12) In the axial view of the electric compressor 10, the bulging portion 25 and the high voltage connector 41 overlap with the high voltage region R1. That is, the high voltage wiring 44 overlaps with the high voltage region R1. Further, the communication connector 45 overlaps with the low voltage region R2. Therefore, the influence of noise radiated from the high-voltage circuit on the low-voltage circuit can be further suppressed.

(13) Since the lid plate 21 is increased in rigidity by the bulging portion 25, the deformation and movement of the bus bar module due to the deformation of the lid plate 21 due to the collision are suppressed. Therefore, in the portion where the first end of the low voltage wiring 50 and the communication connector 45 are caulked and fixed, and the portion where the second end of the low voltage wiring 50 and the pattern of the low voltage circuit of the circuit board 31 are soldered. Damage and short circuit between the low voltage circuit and the high voltage circuit due to the bus bar can be suppressed.

This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
○ In the axial view of the electric compressor 10, for example, a part of the bulging portion 25 may protrude outside the outer peripheral surface of the peripheral wall 22 of the inverter cover 20.

If the insertion / removal direction of the vehicle-side connector 40 with respect to the connection port 42 is orthogonal to the extension line M, the direction in which the connection port 42 of the high voltage connector 41 opens may be other than below the gravity direction.

○ The first erecting surface 25a of the bulging portion 25 does not have to be located on the same surface as the upper outer surface 22a of the peripheral wall 22. For example, in the side view of the electric compressor 10, the first erecting surface 25a of the bulging portion 25 may be at a position lower than the upper outer surface 22a of the peripheral wall 22, or may be above the upper outer surface 22a. It may be located.

○ Any of the second to sixth erection surfaces 25b to 25f of the bulging portion 25 may be located on the same surface as the peripheral surface of the peripheral wall 22.
○ The front end surface 25 g of the bulge portion 25 and the first connector surface 41a of the high voltage connector 41 may be at the same height, or the first connector surface 41a is higher than the front end surface 25 g of the bulge portion 25. It may be in position.

○ The mounting direction of the electric compressor 10 may be appropriately changed, and the electric compressor 10 may be mounted so that the axial direction extends in the front-rear direction and the inverter cover 20 is mounted at the rear end. .. Alternatively, the inverter cover 20 may be mounted so as to be at the left end or the right end while being mounted so that the axial direction of the electric compressor 10 extends in the left-right direction.

○ The vehicle-side communication connector may be inserted / removed from the connection port 48 of the communication connector 45 in a direction orthogonal to the extension line M. In this case, the communication connector 45 is installed on any of the first to fourth side surfaces 26a to 26d of the connector support portion 26.

○ The frame portion 18a and the accommodating recess 18b of the water jacket 16 may not be provided. In this case, the inverter accommodating chamber 19 may be defined only by the front end surface of the water jacket 16 and the accommodating portion 23 of the inverter cover 20.

○ The electric compressor 10 may be used for refrigerant compression used for vehicle air conditioning.
○ The electric compressor 10 has a configuration including a compression unit 12, an electric motor 13, and an inverter 30, and the water jacket 16 may not be provided.

○ In the electric compressor 10, if the inverter cover 20 is located at the end in the axial direction, the arrangement order of the compression unit 12, the electric motor 13, and the water jacket 16 may be appropriately changed.

○ The in-vehicle electric compressor may be mounted on a vehicle other than a fuel cell vehicle, or may be mounted on an electric vehicle, a hybrid vehicle, or an industrial vehicle.

H ... Housing, H1 to H3 ... Height, R1 ... High voltage region, R2 ... Low voltage region, S1 ... Compressor accommodation chamber, S2 ... Motor accommodation chamber, 10 ... In-vehicle electric compressor, 12 ... Compressor, 13 ... Electric motor, 17 ... Rotating shaft, 19 ... Inverter accommodation chamber, 20 ... Inverter cover, 21b ... Outer surface, 22 ... Peripheral wall, 25 ... Protrusion, 30 ... Inverter, 31 ... Circuit board, 41 ... High voltage connector, 42 ... Connection port, 43 ... Through hole, 44 ... High voltage wiring, 45 ... Communication connector, 50 ... Low voltage wiring.

Claims (7)

A compression part that compresses the fluid,
An electric motor that has a rotating shaft and drives the compression unit,
An inverter that has a connector for communication with the outside and controls the electric motor,
A housing including a compression unit accommodating chamber for accommodating the compression unit, a motor accommodating chamber accommodating the electric motor, and an inverter accommodating chamber accommodating the inverter, and having a metal inverter cover for closing the opening of the inverter accommodating chamber. An in-vehicle electric compressor having
The communication connector penetrates the inverter cover and projects from the outer surface of the inverter cover.
The inverter cover has a bulging portion that bulges in the protruding direction of the communication connector with respect to the outer surface of the inverter cover.
The height of the bulging portion from the outer surface of the inverter cover in the protruding direction of the communication connector is higher than the height of the communication connector from the outer surface of the inverter cover.
An in-vehicle electric compressor, wherein the bulging portion covers at least a part of the communication connector in the vicinity of the communication connector. The inverter has a circuit board to which the communication connector is connected via a low voltage wiring and a high voltage to which the communication connector is connected to the circuit board via a high voltage wiring and a higher voltage is applied than the communication connector. A voltage connector is provided, and the high voltage connector penetrates the inverter cover and is exposed to the outside of the inverter cover, and the height of the bulging portion from the outer surface of the inverter cover in the protruding direction. Is the vehicle-mounted electric compressor according to claim 1, which is higher than the height of the high-voltage connector. According to claim 2, the bulging portion is provided with a through hole through which the high voltage wiring is inserted, and the high voltage connector protrudes from a part of the bulging portion in a direction different from the protruding direction. The described in-vehicle electric compressor. The vehicle-mounted electric compressor according to claim 3, wherein the high-voltage connector has a connection port into which a vehicle-side connector is inserted and removed, and the connection port opens downward in the direction of gravity. The circuit board has a high-voltage region in which a high-voltage circuit is formed and the high-voltage connector is electrically connected, and a low-voltage region in which a low-voltage circuit is formed and the communication connector is electrically connected. With
Claims 2 to claim that the high-voltage wiring and the high-voltage connector overlap with the high-voltage region, and the low-voltage wiring and the communication connector overlap with the low-voltage region in the axial view of the rotating shaft. The in-vehicle electric compressor according to any one of 4. The inverter cover includes a peripheral wall that protrudes from the peripheral edge in a direction opposite to the protruding direction of the communication connector, and a part of the bulging portion is located on the same surface as the outer peripheral surface of the peripheral wall. The vehicle-mounted electric compressor according to any one of claims 5. The vehicle-mounted electric compressor according to any one of claims 1 to 6, wherein the bulging portion is arranged inside the outer peripheral surface of the peripheral wall in the axial direction of the rotating shaft.

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