KR20160059984A - Electric compressor - Google Patents

Abstract

The present invention relates to an electric compressor. The electric compressor includes a housing, a motor component, a compression component, and an inverter device. The housing includes: a housing main body having the motor component and the compression component; and a cover fixed to the housing main body and having an accommodation chamber between the housing main body and the cover to accommodate the inverter device in the housing main body. The inverter device includes: two inner conductors wherein one ends thereof are electrically connected to an inverter circuit and the other ends are electrically connected to a power supply; and an electromagnetism noise removing member absorbing electromagnetism noise emitted from the at least two inner conductors by being enclosed by the two inner conductors. The power supply is installed on the outer side of the accommodation chamber, and the two inner conductors supply a direct current from the power supply to the inverter circuit.

Description

[0001] ELECTRIC COMPRESSOR [0002]

The present invention relates to an electric compressor.

Japanese Unexamined Patent Application Laid-Open Publication No. 2010-209788 discloses a motor-driven compressor mounted on a vehicle and including a housing, a motor component, a compression component, and an inverter device. The compression component is driven by the motor component to compress the refrigerant gas. The inverter device drives the motor parts. The motor component and the compression component are disposed in the housing. The receiving chamber is formed on the outer periphery of the housing to receive the inverter device therein.

The inverter device converts the direct current from the power source into an alternating current and supplies power to the motor part. The inverter device includes an inverter circuit, conductors provided to the inverter device, communication cables, and an electromagnetic noise removing member. The inner conductors are electrically connected to the inverter circuit and the power source in the receiving chamber. The communication cables are connected to the inverter circuit and also to the controls of the vehicle. An electromagnetic noise removing member is provided on the communication cables. Examples of noise canceling members include a ferrite core.

According to the motor-operated compressors of the above publications, the noise canceling member provided on the communication cables prevents or reduces electromagnetic noise radiated into the accommodating chamber through the communication cables.

In a motor-driven compressor mounted on a vehicle, a large amount of current is supplied from an electric power source to an inverter circuit through internal conductors, so that the electromagnetic noise radiated from the internal conductors becomes remarkably large, and the electromagnetic noise generated in other devices of the vehicle also becomes large.

In the conventional motor-operated compressors of the above cited publications, measures for protecting the communication cables from electromagnetic noise are taken by providing a noise canceling member, but no action is taken on internal conductors. Therefore, electromagnetic noise radiated from internal conductors can affect other devices in the vehicle, or electromagnetic noise from such other devices in the vehicle can cause the inverter circuit to stop.

A large-size noise removing device is required to sufficiently remove electromagnetic noise. In order to provide a large noise removing member in the motor-driven compressor, the size of the housing needs to be increased to provide a large accommodating space, which increases the size of the motor-driven compressor itself and hinders easy mounting of the motor-driven compressor on the vehicle.

The present invention made in view of the above-described circumstances relates to a motor-driven compressor which can be easily mounted and which can appropriately absorb electromagnetic noise emitted from at least internal conductors.

According to an aspect of the present invention, there is provided an electric compressor including a housing, a motor component, a compression component driven by the motor component and compressing the refrigerant gas, and an inverter device for driving the motor component. The housing includes a housing main body in which the motor parts and the compression parts are disposed, and a cover fixed to the housing main body to form an accommodating chamber between the housing main body and the inverter main body for accommodating the inverter device in the housing main body. The inverter device comprises an inverter circuit, two internal conductors, electrically connected to the inverter circuit at one end thereof, and electrically connectable to a power source at their other ends, the power source being provided outside the receiving chamber, The two internal conductors supplying the direct current, and the electromagnetic noise removing member absorbing the electromagnetic noise radiated from the at least two internal conductors. The cover includes a bottom wall spaced apart from the housing body and a peripheral wall extending from the bottom wall toward the housing body. The bottom wall has a protruding portion which protrudes from the housing main body to form a receiving space therein. Each of the two internal conductors includes an extension connected at one end thereof to the inverter circuit or at one end thereof for connection to a power supply, and a bent portion connected to the other end of the extension. The bend is located further away from the housing body than the extension and at least a portion of the bend is covered with an electromagnetic noise removal member. At least a part of the electromagnetic noise removing member is disposed in the receiving space.

Other aspects and advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention.

1 shows a motor-driven compressor according to a first embodiment of the present invention, in which a part of the motor-driven compressor is shown in a sectional view;
2 is an enlarged cross-sectional view of a power supply assembly of a motor-driven compressor according to a first embodiment of the present invention;
3 is an enlarged cross-sectional view of a motor-driven compressor according to a first embodiment taken along line III-III of FIG. 1;
4 is a partial sectional view showing an electric compressor as an embodiment for comparison with the first embodiment;
5 is a partial sectional view of a motor-driven compressor according to a second embodiment of the present invention;
6 is an enlarged cross-sectional view of a motor-driven compressor according to a second embodiment taken along line VI-VI of Fig. 5; Fig.
7 is a partial cross-sectional view of a motor-driven compressor according to a third embodiment of the present invention;
8 is an enlarged cross-sectional view of a motor-driven compressor according to a third embodiment taken along line VIII-VIII in FIG. 7;
9 is a partial sectional view of a motor-driven compressor according to a fourth embodiment of the present invention;
10 is a sectional view of still another embodiment of the cover of the motor-driven compressor according to the fourth embodiment;
11 is a sectional view of still another further embodiment of the cover of the motor-driven compressor according to the fourth embodiment;
12 is a partial sectional view of an electric compressor according to a fifth embodiment of the present invention.

The following will describe first to fifth embodiments of the present invention with reference to the accompanying drawings. The electric compressors of the embodiments are mounted on the vehicle and integrated into the refrigeration circuit of the air conditioning system of the vehicle.

First Embodiment

1, there is shown a motor-driven compressor according to a first embodiment of the present invention including a housing assembly 1, a motor component 3, a compression component 5, and an inverter device 7. The housing assembly 1 includes a first housing 1A, a second housing 1B, and a cover 9. The first housing 1A and the second housing 1B form the housing main body of the present invention.

The motor component 3 includes a stator 11, a rotor 13, and a drive shaft 15. The stator 11 is fixed to the inner peripheral surface of the second housing 1B and has a coil (not shown). The rotor 13 is disposed radially inward of the stator 11 and is fixedly mounted on the drive shaft 15 for rotation therewith.

The compression component 5 includes a fixed scroll fixed to the inner peripheral surface of the second housing 1A and a movable scroll disposed to face the fixed scroll and orbiting together with the rotation of the drive shaft 15. [ Scroll type. The fixed scroll and the movable scroll engage each other to form a compression chamber therebetween. The discharge chamber is formed between the stationary scroll and the first housing 1A. It should be noted that the fixed scroll, the movable scroll, the compression chamber, and the discharge chamber are not shown in Fig.

The first housing 1A includes a bottom wall 1C extending perpendicular to the axial direction of the drive shaft 15 and a peripheral wall 1D extending from the bottom wall 1C in the axial direction of the drive shaft 15. [ do. The bottom wall 1C and the peripheral wall 1D form a cylinder having an opening on the closed end and the opposite side of the bottom wall 1C. The bottom wall 1C has through it discharge holes (not shown) for providing fluid communication between the discharge chambers and the condensers (not shown) provided on the outside of the motor-driven compressors.

The second housing 1B includes a bottom wall 1E and a peripheral wall 1F extending from the bottom wall 1E in the axial direction of the drive shaft 15. [ The bottom wall 1E and the peripheral wall 1F form a cylinder having an opening on the closed end and the side facing the bottom wall 1E. With respect to the open end of the second housing 1B facing the bottom wall 1E, the first housing 1A is fixed at its open end. The peripheral wall 1F of the second housing 1B has through it a suction hole (not shown) which provides fluid communication between the outer evaporator and the second housing 1B in the refrigeration circuit.

The cover 9 has a cylindrical shape with a closed end. More specifically, the cover 9 includes a bottom wall 9A separated from the second housing 1B and a peripheral wall 9B extending from the bottom wall 9A toward the second housing 1B. The cover 9 is made of, for example, metal and is fixed to the end of its peripheral wall 9B with respect to the bottom wall 1E of the second housing 1B. The cover 9 and the bottom wall 1E of the second housing 1B form an accommodating chamber 16 for receiving the inverter device 7 therein. The feed port 17 is formed through the peripheral wall 9B of the cover 9. The position and orientation of the opening of the feed port 17 can be selectively configured.

The bottom wall 9A of the cover 9 has a protruding portion 90 projected away from the first and second housings 1A and 1B. Specifically, the protruding portion 90 is formed in a protruding shape so as to form the accommodation space 75 in the cover 9 by expanding the accommodating chamber 16. As shown in Fig. More specifically, according to the first embodiment, the bottom wall 9A of the cover 9 includes a flat portion 9C, a cover portion 90B formed in parallel with the flat portion 9C, and a flat portion 9C, And a connecting portion 90A integrally formed with the portion 90B and connecting the flat portion 9C and the covering portion 90B. Thus, the projecting portion 90 is formed by the connecting portion 90A and the covering portion 90B. Thus, the lid portion 90B closes the open end formed by the connecting portion 90A. The protruding portion 90 having such a configuration can be easily formed on the bottom wall 9A of the cover 9. [

In the motor-driven compressor according to the first embodiment, the protruding portion 90 is formed by bending a single metal sheet so as to form a recess corresponding to the protruding portion 90. The flat portion 9C, the connecting portion 90A and the covering portion 90B are provided separately and can be joined together by any means to form the protruding portion 90 of the cover 9. Alternatively, the protruding portion 90 may be formed by including the connecting portion 90A and the covering portion 90B as well as any other members.

The inverter device 7 includes an inverter circuit 71 and a power supply assembly 73 for supplying electric power to the inverter device 7 from an external power source. The inverter circuit 71 is attached to the bottom wall 1E of the second housing 1B and is accommodated in the accommodating chamber 16 with the inverter circuit 71 attached to the bottom wall 1E. The inverter circuit 71 includes a circuit board 710 and a plurality of semiconductors (not shown) arranged on the circuit board 710. The inverter circuit 71 includes a DC current (not shown) of a power source To an alternating current. The final alternating current converted by the inverter circuit 71 is supplied to the coil (not shown) provided in the stator 11 of the motor component 3 via the lead wire 72 or the like. The connector 71A is provided in the inverter circuit 71 to connect the inverter circuit 71 to the power supply assembly 73. [ The inverter circuit 71 may be connected to the power supply assembly 73 in a different manner. For example, the inverter circuit 71 and the power supply assembly 73 may be directly connected to each other.

The power supply assembly 73 is formed by integrating the resin isolator 31, the first and second bus bars 25 and 27, and the ferrite core 29 as the insulating member of the present invention. The first and second bus bars 25 and 27 correspond to the two internal conductors of the present invention. The ferrite core 29 corresponds to the electromagnetic noise removing member of the present invention.

As shown in Figures 2 and 3, the first and second bus bars 25 and 27 are formed of elongated flat plates. As shown in FIG. 2, the first bus bar 25 and the second bus bar 27 are disposed parallel to each other and extend along the flat portion 9C of the cover 9. The shape of the first and second bus bars 25 and 27 is not limited to a flat plate, but the cross section of the first and second bus bars 25 and 27 may be circular. Any other members other than the first and second bus bars 25 and 27 may be used as the two internal conductors.

As shown in Figures 1 and 2, the first and second bus bars 25 and 27 each have bends 250 and 270, respectively. Specifically, the first bus bar 25 includes a first flat portion 25A, a connecting portion 25B, a second flat portion 25C, a slope portion 25D, and a third flat portion 25E Each having opposed ends.

One end of the first flat portion 25A is connected to a power source (not shown) provided outside the accommodation chamber 16 in Fig. 1 through a lead wire (not shown), and one end of the third flat portion 25E is connected to a connector 71A. ≪ / RTI > It should be noted that one end of the third planar portion 25E may be connected to the inverter circuit 71 via any other conductive member. Thus, one end of the first flat portion 25A may be connected to the inverter circuit 71 and one end of the third flat portion 25E may be connected to the power supply via the lead wire.

The second flat portion 25C is formed so that the first and third flat portions 25A and 25E are spaced apart from the same distance from the first and second housings 1A and 1B by the first and second housings 1A and & RTI ID = 0.0 > 1B. ≪ / RTI > One end of the second flat portion 25C is connected to the other end of the first flat portion 25A which is not connected to the power source through the connecting portion 25B. The other end of the second flat portion 25C is connected to the other end of the third flat portion 25E through the slope portion 25D.

2, the bent portion 250 of the first bus bar 25 includes a first bent portion 250A and a second flat portion 25C having a connecting portion 25B and a second flat portion 25C, 25C and a second bent portion 250B having a slope-like portion 25D.

The first flat portion 25A and the third flat portion 25E correspond to the extension of the present invention and the second flat portion 25C corresponds to the discrete portion of the present invention and the slope portion 25D corresponds to the non- It should be noted that it corresponds to the connecting part of the invention.

The first bus bar 25 may be provided by forming a recess in a three-elongated flat plate. 1, the slope portion 25D is formed such that the distance between at least a portion of the slope portion 25D and the first and second housings 1A and 1B toward the second flat portion 25C .

2, similar to the first bus bar 25, the second bus bar 27 includes a first flat portion 27A corresponding to the first flat portion 25A, a second flat portion 27A corresponding to the connecting portion 25B , A second flat portion 27C corresponding to the second flat portion 25C, a slope portion 27D corresponding to the slope portion 25D, and a second bus bar 27B corresponding to the second flat portion 25C, And a third flat portion 27E corresponding to the third flat portion 25E of the second flat portion 25A. The second bus bar 27 includes a bent portion 270 having a first bent portion 270A corresponding to the first bent portion 250A and a second bent portion 270B corresponding to the second bent portion 250B, . Since the second bus bar 27 has substantially the same configuration as the first bus bar 25, detailed description thereof will be omitted.

2 and 3, the ferrite core 29 has the shape of a square tube having an insertion hole 29A therein. The first and second bus bars 25 and 27 are positioned such that the second flat portions 25C and 27C of the respective first and second bus bars 25 and 27 are positioned in the insertion hole 29A Through hole 29A. The second flat portions 25C and 27C passed through the insertion hole 29A are surrounded by the ferrite core 29. [ The flat portions 25C and 27C are formed on the inner surface of the ferrite core 29 forming the insertion hole 29A to prevent contact between the second planar portions 25C and 27C and the inner surface of the ferrite core 29 As shown in FIG. However, when the first and second bus bars 25 and 27 are made of a material with low magnetic permeability, such as an aluminum alloy, the second planar portions 25C and 27C form an insertion hole 29A The inner surface of ferrite core 29 may be disposed in contact with the inner surface of ferrite core 29.

As shown in Figure 2, the first and second bus bars 25 and 27 and the ferrite core 29 are connected to one ends of respective first planar portions 25A and 27A, Are covered with the resin isolator 31 except for one ends of the projections 25E and 27E. 3, the space between the second planar portions 25C and 27C in the power supply assembly 73 and the inner surface of the ferrite core 29 forming the insertion hole 29 is sealed by the resin isolator 31 ). However, the first and second bus bars 25 and 27 may be made of a material with low magnetic permeability, or a sufficient discrete distance may be formed between the second planar portions 25 and 27 and the ferrite core The space between the second planar portions 25 and 27 and the inner surface of the ferrite core 29 may not be filled with the resin isolator 31. [

By covering the first and second bus bars 25 and 27 and the ferrite core 29 with the resin isolator 31 as described above, the first assembly portion 73A, the second assembly portion 73B And the third assembly portion 73C are formed of the power supply assembly 73 as shown in Fig. The first assembly portion 73A includes first planar portions 25A and 27A and a resin isolator 31. The second assembly portion 73B includes connecting portions 25B and 27B, second flat portions 25C and 27C, sloped portions 25D and 27D, a ferrite core 29, and a resin isolator 31 ). The third assembly portion 73C includes third planar portions 25E and 27E and a resin isolator 31.

In the power supply assembly 73, as measured in the axial direction of the drive shaft 15, in a direction perpendicular to the extending direction of the first planar portions 25A and 27A and the third planar portions 25E and 27E The thickness of the second assembly portion 73B of the first assembly portion 73B of the first flat portion 25A and the second flat portion of the second flat portion 25B of the first flat portion 25B is substantially equal to the thickness of the first assembly portion 25B in the direction perpendicular to the extending direction of the first planar portions 25A and 27A and the third planar portions 25E and 27E (73A) and the third assembly portion (73C). Accordingly, the power supply assembly 73 has a protrusion in the second assembly portion 73B.

The power supply assembly 73 is set in the receiving chamber 16 in such a manner that a part of the second assembly portion 73B is received in the receiving space 75 and the first and second bus bars 25 and 27 are set in the first And one end of each of the first flat portions 25A and 27A of the second bus bars 25 and 27 are received in the accommodating chamber 16 in a state exposed from the feed port 17 . A part of the second assembly portion 73B is accommodated in the accommodation space 75 so that a part of the ferrite core 29 is disposed in the accommodation space 75. [ That is, a part of the ferrite core 29 is disposed in the accommodating space 75 in facing relation with the connecting portion 90A of the cover 9 and the covering portion 90B.

As described above, one ends of the third planar portions 25E and 27E are connected to the inverter circuit 71 through the connector 71A, and one ends of the first planar portions 25A and 27A are connected to the lead wires To the power supply. Therefore, the first and second bus bars 25 and 27 are electrically connected to the inverter circuit 71 and the power feeder, so that the DC current is supplied from the power feeder to the inverter circuit 71. [

The inverter circuit 71 supplies power to the coil provided in the stator 11 while converting the direct current from the power source to the alternating current so that the rotor 13 and the drive shaft 15 of the motor component 3, Is driven and rotated. The rotation of the rotor 13 and the drive shaft 15 causes the refrigerant gas to be sucked into the compression part 5 through the suction hole and compressed in the compression part 5 and to be discharged to the outside of the compression part 5 through the discharge hole To be discharged.

In the motor-driven compressor of the present embodiment in which the second flat portions 25C and 27C of the first and second bus bars 25 and 27 are surrounded by the ferrite core 29, respectively, The circuit 71 absorbs electromagnetic noise that is generated when it converts the DC power from the power source to AC power and that is emitted through the first bus bars 25 and 27. The ferrite core 29 also absorbs electromagnetic noise generated by other devices mounted on the vehicle. Furthermore, the inverter circuit 71 is not sensitive to the electromagnetic noise generated outside the inverter circuit 71.

The motor-driven compressor of this embodiment allows the use of the ferrite core 29 of a large size while preventing an increase in the size of the cover 9 itself.

The effects of the motor-driven compressor according to the first embodiment will be specifically described based on a comparison with the motor-driven compressor according to the comparative embodiment shown in Fig. In the description of the motor-driven compressor according to the comparative embodiment, only the differences from the motor-driven compressor according to the first embodiment will be dealt with, and the constituent components and configurations common to the motor-driven compressors according to the first embodiment and the comparative embodiment are the same And will not be described in detail. The motor-driven compressor according to the comparative embodiment has the cover 10. The cover 10 includes a bottom wall 10A and a peripheral wall 10B extending from the bottom wall 10A in the axial direction of the drive shaft 15 toward the second housing 1B. The bottom wall 10A does not have a protruding portion such as 90. [ That is, the bottom wall 10A is formed flat. Therefore, the cover 10 has no accommodation space therein, such as 75. [

The electric compressor according to the comparative embodiment uses the power supply assembly 74 in which the first and second bus bars 26 and 28 and the ferrite core 29 are covered with the resin isolator 31. The first and second bus bars 26 and 28 are arranged to extend in the radial direction of the drive shaft 15, but have no bends. One ends of the first and second bus bars 26 and 28 are connected to the power source via lead wires, for example, and the other ends thereof are connected to the inverter circuit 71 through the connector 71A. As measured in the axial direction of the drive shaft 15, the thickness of the feed assembly 74 is substantially constant.

The dimension of the peripheral wall 10B of the cover 10 in the axial direction of the drive shaft 15 is increased in order to accommodate the power supply assembly 74 in the receiving chamber 16 And this includes an increase in the size of the cover 10 itself. In the motor-driven compressor according to the comparative example, the distance between the surface of the inverter circuit 71 facing the power supply assembly 74 and the inner surface of the bottom wall 10A of the cover 10 is represented by L2.

4, the size of the ferrite core 29 needs to be reduced so as to provide the ferrite core 29 while maintaining the size of the cover 10. In the motor-driven compressor according to the comparative example to be mounted on the vehicle, however, a large current is supplied from the power source to the inverter circuit 71, and therefore such a miniaturized ferrite core 29 can not satisfactorily absorb electromagnetic noise.

In contrast, the electric compressor according to the first embodiment has the projecting portion 90 at the bottom wall 9A of its cover 9 and the first and second bus bars 25 and 27 at the curved portions 250 Connecting portions 25B and 27B, second flat portions 25C and 27C, and slope portions 25D and 27D, respectively, which form first and second flattened portions 270 and 270, respectively. In the power supply assembly 73, the thickness of the second assembly portion 73B in the axial direction of the drive shaft 15 is thicker than the thickness of the first assembly portion 73A and the third assembly portion 73C in the same direction . A part of the second assembly portion 73B of the power supply assembly 73 is accommodated in the accommodation space 75 formed in the projecting portion 90 of the cover 9. [

In the motor-driven compressor according to the first embodiment, the distance between the surface of the inverter circuit 71 facing the power supply assembly 73 and the inner surface of the cover portion 90B of the cover 9 is set to a distance L2 Corresponding. The distance between the surface of the inverter circuit 71 facing the power supply assembly 73 and the inner surface of the cover 9 excluding the projecting portion 90, that is, the inner surface of the flat portion 9C of the bottom wall 9A, L1, which is shorter than the above-mentioned distance L2 shown in Fig. More specifically, in the motor-driven compressor according to the first embodiment, a part of the cover 9 separated from the surface of the inverter circuit 71 facing the power supply assembly 73 by a distance L 2 is limited A ferrite core 29 having a size sufficiently large enough to absorb only electromagnetic noise as a result can be used while maintaining the size of the cover 9 and thus the size of the motor compressor itself.

Therefore, the motor-driven compressor according to the first embodiment provides easy mounting and can satisfactorily absorb electromagnetic noise radiated from at least the first and second bus bars 25 and 27.

Furthermore, in the motor-driven compressor according to the first embodiment, the power supply assembly 73 is formed by integrating the first and second bus bars 25 and 27 and the ferrite core 29 by the resin isolator 31 The first and second bus bars 25 and 27 are suitably insulated from the cover 9 by the resin isolator 31. In addition, the resin isolator 31 prevents the first and second bus bars 25 and 27 and the ferrite core 29 from being easily received in place in the receiving chamber 16 of the cover 9 Allow.

Furthermore, in the motor-driven compressor according to the first embodiment, the distance between the sloped portions 25D and 27D and the first and second housings 1A and 1B increases toward the second flat portion 25C, Shaped portions 25D and 27D are formed and the ferrite core 29 is connected to the first and second bus bars 25 and 27 through the ferrite core 29 from the third planar portions 25E and 27E side, And is disposed in the second flat portions 25C and 27C. Therefore, provision of the sloped portions 25D and 27D facilitates the placement of the ferrite core 29 in the second planar portions 25C and 27C.

Furthermore, in the motor-driven compressor according to the first embodiment, the cover 9 made of metal is also generated by the inverter circuit 71 and is supplied to the other devices of the vehicle from the first and second bus bars 25 and 27 Electromagnetic shielding that further reduces the influence of electromagnetic noise radiated from the outside of the cover 9 and also the influence of electromagnetic noise on the inverter circuit 71 from outside.

Second Embodiment

An electric compressor according to a second embodiment of the present invention will now be described with reference to Figs. 5 and 6. Fig. The motor-driven compressor according to the second embodiment has a ferrite core 290 corresponding to the ferrite core 29 of the first embodiment. The ferrite core 290 is different from the ferrite core 29 in that the ferrite core 290 is of the split type including the first ferrite core 35 and the second ferrite core 37. As shown in FIG. 6, the first and second ferrite cores 35 and 37 are each formed in a U-shaped cross section with recesses 35A and 37B, respectively. The recess 35A of the first ferrite core 35 and the recess 37B of the second ferrite core 37 are aligned with each other in such a manner as to surround the second flat portions 25C and 27C. The remaining constitution of the motor-driven compressor according to the second embodiment is substantially the same as the constitution of the first embodiment, and hence the constituent elements and the constructions common to the motor-driven compressors according to the first and second embodiments are denoted by the same reference numerals And detailed description thereof will be omitted.

In the motor-driven compressor according to the second embodiment, the first and second ferrite cores 35 and 37 surround the second planar portions 25C and 27C and the first and second bus bars 25 and 27, Need not always be inserted through the first and second ferrite cores 35 and 37, respectively. Therefore, in the motor-driven compressor according to the second embodiment, the ferrite core 290 can be provided more easily at the first and second bus bars 25 and 27. [ The effects described with reference to the first embodiment also apply to the second embodiment.

Third Embodiment

A motor-driven compressor according to a third embodiment of the present invention will now be described with reference to Figs. 7 and 8. Fig. The electric compressor according to the third embodiment has a ferrite core 39 instead of the ferrite core 29 of the first embodiment. As shown in Fig. 8, the ferrite core 39 is formed in a U-shaped cross section with a recess 39A. Specifically, the ferrite core 39 includes a flat portion 39B connecting the pair of spaced portions 39C and the spaced portions 39C to surround the second flat portions 25C and 27C. More specifically, the spaced apart portions 39C extend from the opposite ends of the flat portion 39B toward the cover portion 90B of the cover 9 and have ends that directly contact the inner surface of the cover portion 90B (390). The ferrite core 39 is formed such that the ends 390 of the spaced portions 39C no longer contact the inner surface of the lid portion 90B or the ends 390 of the spaced portions 39C of the ferrite core 39 It should be noted that the resin insulator 390 may be formed so as to be insulated with the resin isolator 31. The remaining configuration of the motor-driven compressor according to the third embodiment is substantially the same as that of the first embodiment, and therefore, components and configurations common to the motor-driven compressor according to the first and third embodiments are denoted by the same reference numerals And its detailed description will be omitted.

The motor-driven compressor according to the third embodiment also exhibits the same effects as those of the motor-driven compressor according to the second embodiment.

Fourth Embodiment

An electric compressor according to a fourth embodiment of the present invention will now be described with reference to Fig. The motor-driven compressor according to the fourth embodiment has a cover 41 corresponding to the cover 9 of the motor-driven compressor according to the first embodiment. The cover 41 includes a cover body 410 made of resin and a shield cover 411 made of metal.

As in the case of the cover 9, the cover body 410 includes a bottom wall 41A and a peripheral wall 41B. The bottom wall 41A includes a flat portion 41C. Similar to the cover 9 of the first embodiment, the cover body 410 also includes a protruding portion 90. The shielding cover 411 is formed to follow the outer contour of the cover body 410. The remaining constitution of the motor-driven compressor according to the fourth embodiment is substantially the same as the constitution of the first embodiment, and therefore the constituent elements and the constructions common to the motor-driven compressors according to the first and fourth embodiments are indicated by the same reference numerals And its detailed description will be omitted.

In the motor-driven compressor according to the fourth embodiment, the cover body 410 is made of resin, which helps reduce the weight of the motor-driven compressor. A shielding cover 411 attached to the outer surface of the cover body 410 provides electromagnetic shielding to the receiving chamber 16. The effects mentioned with reference to the first embodiment also apply to the fourth embodiment.

It should be noted that, as shown in Fig. 10, the shielding cover 411 can be formed by insert molding. 11, the shielding cover 411 may be provided on the inner surface of the cover body 410 or on the first and second bus bars 25 and 27 side of the cover body 410 have. In these cases, if the insulation between the first and second bus bars 25 and 27 and the shielding cover 411 is ensured by the cover body 410, the first and second bus bars 25 and < RTI ID = 0.0 > 26 and the ferrite core 29 do not necessarily have to be insulated with the resin isolator 31. Therefore, the motor compressor is prevented from increasing in size.

Fifth Embodiment

An electric compressor according to a fifth embodiment of the present invention will now be described with reference to Fig. The motor-driven compressor according to the fifth embodiment has first and second bus bars 51 and 53 corresponding to the first and second bus bars 25 and 27 of the first embodiment. The first and second bus bars 51 and 53 are configured such that the first and second bus bars 51 and 53 are spaced apart from the third planar portions and slope portions, such as 25E and 27E of the previous embodiments 25D, and 27D, respectively, in the motor compressors according to the first to fourth embodiments. One ends of the second planar portions 51C and 53C are connected to the inverter circuit 71 through the connector 71A. One ends of the first planar portions 51A and 53A of the first and second bus bars 51 and 53 are connected to a power source via a lead wire (not shown). The first planar portions 51A and 53A and the second planar portions 51C and 53C are connected to each other via the connection portions 51B and 53B, respectively. It should be noted that one ends of the first planar portions 51A and 53A may be connected to the inverter circuit 71 and one ends of the second planar portions 51C and 53C may be connected to the power source through the lead wires .

The first and second bus bars 51 and 53 each include bent portions 510 and 530 formed by the connecting portions 51B and 53B and the second flat portions 51C and 53C, respectively. The bent portions 510 and 530 separated by a greater distance from the first and second housings 1A and 1B than the first flat portions 51A and 53A correspond to the extensions of the present invention.

Furthermore, the power supply assembly 73 includes a first assembly portion 73A and a second assembly portion 73B. The first assembly portion 73A includes first planar portions 51A and 53A and a portion of the resin isolator 31. The second assembly portion 73B includes connecting portions 51B and 53B, second flat portions 51C and 53C, a ferrite core 29, and a portion of the resin isolator 31.

The electric compressor according to the fifth embodiment is a compressor in which the shape of the cover 9 is partially changed and the protruding portion of the cover 9 is used for the connecting portion 90A, the peripheral wall 9B, and the bent portions 510 and 530 Which is different from the electric compressor according to the first embodiment in that it includes a covering portion 90B covering the space.

As the compression component used in the electric compressor according to the present invention, a scroll type compression component, a swash plate type compression component, or a vane type compression component may be used.

As the electromagnetic noise removing member, a magnetic core, for example, a ferrite core and a dust core may be used.

The cover can be made of metal alone as well as a combination of metal and resin. The two internal conductors may be manufactured in a variety of shapes, for example, a plate shape, a rod shape, or any other shape.

In the motor-driven compressor according to the fifth embodiment, similarly to the first embodiment in which the power supply assembly 73 is housed in the accommodating chamber 16, a part of the second assembly portion 73B is accommodated in the accommodating space 16, And a part of the ferrite core 29 is disposed in the receiving space 75. [ The remaining constitution of the motor-driven compressor according to the fifth embodiment is substantially the same as that of the first embodiment, and hence the constituent elements and the constructions common to the motor-operated compressors according to the first and fifth embodiments are denoted by the same reference numerals And its detailed description will be omitted.

The motor-driven compressor according to the fifth embodiment also exhibits the same effects as those of the motor-driven compressor according to the first embodiment.

The present invention has been described with reference to the first to fifth embodiments. It should be understood, however, that the invention is not limited to the embodiments described above, but may be varied within the scope and spirit of the invention.

The components of the motor-driven compressor according to the first to fifth embodiments can thus be appropriately replaced with each other to produce the motor-driven compressor of the present invention. For example, the cover 41 of the motor-driven compressor according to the fourth embodiment can be applied as a cover for the motor-driven compressor according to the second embodiment.

The ferrite cores 29, 290 and 39 may not be covered with the resin isolator 31 when the cover 9 is made of a material having low magnetic permeability, for example, an aluminum alloy.

In the motor compressors according to the first to fifth embodiments, the power supply assembly 73 is configured such that one ends of the first flat portions 25A and 27A are disposed in the receiving chamber 16). However, the configuration of the power supply assembly 73 is not limited thereto, and one ends of the first planar portions 25A and 27B may be formed such that one ends of the first planar portions 25A and 27B are located outside the accommodating chamber 16 It may not be disposed in the feed port 17 as long as it can be connected to the provided power source.

In the motor compressors according to the first to fifth embodiments, the ends of the peripheral walls 9B and 41B of the covers 9 and 41 are respectively connected to the bottom wall 1E of the second housing 1B, Respectively. However, the covers 9 and 41 are not limited to such a configuration, and the covers 9 and 21 may be arranged so that any receiving chamber, such as 16, capable of receiving the inverter device 7 therein, ) And the housing assembly including the first and second housings 1A and 1B.

The covers 9 and 41 of the motor-driven compressors according to the first to fifth embodiments have a cylindrical shape with a closed end. However, the shapes of the covers 9 and 41 are not limited thereto, but the covers 9 and 41 may have the shape of a cube or a cuboid having a volume large enough to have the accommodating chamber 16 therein have.

In the motor compressors according to the first to fourth embodiments, the ferrite core 29 may be provided so as to be adjacent to and to surround the second planar portions 25C and 27C. Alternatively, the ferrite core 29 may be provided to adjoin and surround the connecting portions 25B and 27B or the sloped portions 25D and 27D. That is, the ferrite core 29 includes the ferrite core 29, the connecting portions 25B and 27B, the second flat portions 25C and 27C, and the sloped portions 25A and 25B that form the bent portions 250 and 270 25D, and 27D, respectively. The same applies to the electric compressor according to the fifth embodiment.

In the motor compressors according to the first to fourth embodiments, the connecting portions 25B and 27B, the second flat portions 25C and 27C of the respective first and second bus bars 25 and The slope portions 25D and 27D are formed to extend angularly with respect to their adjacent portions. According to the present invention, however, the first and second bus bars 25 and 27 may be formed as arcuate curves with respect to the bends 250 and 270. Similarly, the protruding portion 90 can be formed as a curve having no corner. The same applies to the electric compressor according to the fifth embodiment.

The present invention can be applied to an air conditioning apparatus in a vehicle or the like.

Claims (4)

1. An electric compressor comprising a housing, a motor component, a compression component driven by the motor component and compressing a refrigerant gas, and an inverter device for driving the motor component,
The housing includes a housing main body in which the motor part and the compression part are disposed, and a cover fixed to the housing main body to form an accommodating chamber between the housing main body and the housing main body for accommodating the inverter device in the housing main body ,
The inverter device includes:
Inverter circuit,
The inverter circuit being electrically connected to the inverter circuit at one of its ends and being electrically connectable to a power source at the other ends thereof, the power source being provided outside of the receiving chamber to supply a DC current , The two internal conductors supplying
And an electromagnetic noise removing member surrounding the two inner conductors to absorb electromagnetic noise emitted from at least the two inner conductors,
The cover
A bottom wall spaced apart from the housing main body, and
And a peripheral wall extending from the bottom wall toward the housing body,
The bottom wall has a protruding portion protruding from the housing main body to form a receiving space therein,
Each of the two internal conductors has a &
An extension, connected to the inverter circuit at one end thereof or connectable to the power supply at one end thereof,
And a bent portion connected to the other end of the extended portion,
Wherein the bent portion is disposed further away from the housing main body than the extending portion, at least a part of the bent portion is covered with the electromagnetic noise removing member,
And at least a part of the electromagnetic noise removing member is disposed in the accommodating space. The method according to claim 1,
Wherein the bottom wall includes a flat portion,
The projecting portion includes a cover portion formed parallel to the flat portion, and
And a connecting portion formed integrally with the flat portion and the cover portion and connecting the flat portion and the cover portion. 3. The method according to claim 1 or 2,
The two internal conductors and the electromagnetic noise removing member are covered with an insulating member to form an integral power supply assembly,
The feed assembly includes a first assembly portion having the extension and a portion of the insulating member and a second assembly portion having the bent portion, the electromagnetic noise removing member, and a portion of the insulating member,
Wherein a thickness of the second assembly portion in a direction perpendicular to an extending direction of the extending portion is thicker than a thickness of the first assembly portion in a direction perpendicular to the extending direction of the extending portion. 3. The method according to claim 1 or 2,
The bent portion being a spaced apart portion disposed at a distance apart from the extending portion, and
And a connecting portion connecting the spacing portion and the other end portion of the extending portion,
Wherein the connecting portion is formed such that a distance between at least a portion of the connecting portion and the housing body increases toward the spacing portion.

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