Electric compressor

Abstract

The invention provides an electric compressor. A reduction in positional accuracy of a mounting portion is prevented. An electric compressor (1) includes: an electric motor (10); a compression mechanism (20) driven by the electric motor (10); an inverter (30) that drives the electric motor (10); a housing (40) that houses the electric motor (10), the compression mechanism (20), and the inverter (30); and an attachment part (50) which is formed in the housing (40) and which attaches the housing (40) to a predetermined object (C). The housing (40) has a motor housing (41) that accommodates the electric motor (10), a compression mechanism housing (42) that accommodates the compression mechanism (20), and an inverter housing (43) that accommodates the inverter (30). The attachment part (50) is configured from a first attachment leg part (51) provided to the compression mechanism housing (42), and second attachment leg parts (52, 52) provided to the inverter housing (43).

Description

Technical Field

[0001] The present invention relates to an electric compressor mounted on a predetermined object such as a vehicle. Background Art

[0002] Patent document 1 discloses an electric compressor including an electric motor, a compression mechanism driven by the electric motor, an inverter driving the electric motor, and a housing (hereinafter referred to as a housing) for accommodating them. The electric compressor is mounted on a vehicle by means of a mounting portion consisting of a first mounting foot, a second mounting foot, and a third mounting foot. The first mounting foot and the second mounting foot are integrally provided with the peripheral wall of a motor housing in the housing, and the third mounting foot is provided on a cover on the inverter side of the housing. Moreover, in the electric compressor, the stator of the electric motor is generally installed inside the housing by shrink fitting. During the shrink fitting, the housing is heated.

[0003] Patent Document 1: Japanese Patent No. 6955220

[0004] However, in the electric compressor disclosed in Patent Document 1, since the first mounting leg and the second mounting leg are integrally provided with the motor housing, the first mounting leg and the second mounting leg are heated together with the motor housing during the shrink-fitting of the stator. As a result, there is a risk that the first mounting leg and the second mounting leg are deformed, resulting in a decrease in the position accuracy of the mounting portion caused by stator assembly. Summary of the invention

[0005] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an electric compressor having a structure capable of preventing a decrease in the position accuracy of a mounting portion caused by stator assembly.

[0006] The electric compressor of the present invention comprises: an electric motor; a compression mechanism driven by the electric motor; an inverter driving the electric motor; a housing accommodating the electric motor, the compression mechanism and the inverter; and a mounting portion formed on the housing for mounting the housing on a predetermined object. In the electric compressor, the housing has a motor housing accommodating the electric motor, a compression mechanism housing accommodating the compression mechanism and an inverter housing accommodating the inverter, and the mounting portion is composed of a first mounting leg provided on the compression mechanism housing and a second mounting leg provided on the inverter housing.

[0007] According to the present invention, it is possible to provide an electric compressor having a structure capable of preventing a decrease in the positional accuracy of a mounting portion caused by stator assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is an exploded perspective view of an electric compressor according to one embodiment of the present invention. Figure 2 It is a three-dimensional diagram of an electric compressor. Figure 3 This is a conceptual diagram for explaining an example of a state in which the electric compressor is mounted on an installation object. Figure 4 It is a cross-sectional view of the first mounting foot of the electric compressor. Figure 5 It is a cross-sectional view of the second mounting foot of the electric compressor. Figure 6 It is an enlarged perspective view of the first mounting leg portion including a modified example. Figure 7 It is an enlarged perspective view of the first mounting leg including another modified example. DETAILED DESCRIPTION

[0009] Hereinafter, embodiments of the electric compressor according to the present invention will be described with reference to the drawings.

[0010] Figure 1~Figure 3 1 is a diagram for explaining an electric compressor 1 according to an embodiment of the present invention. Specifically, Figure 1 is an exploded perspective view of the electric compressor 1. Figure 2 is a perspective view of the electric compressor 1, Figure 3 1 is a conceptual diagram for explaining an example of a state in which the electric compressor 1 is mounted on a predetermined object C. Figure 3 In the figure, a part is shown as a schematic cross-sectional view.

[0011] The electric compressor 1 is mounted on a vehicle as part of a vehicle air conditioning device, for example, and is used as a device for sucking, compressing, and ejecting a refrigerant for vehicle air conditioning. The electric compressor 1 is installed on a part of a vehicle body in an engine room of the vehicle, for example. That is, in the present embodiment, the object C to which the electric compressor 1 is installed is a part of the vehicle body.

[0012] Reference Figure 1 and Figure 2 The electric compressor 1 includes: an electric motor 10; a compression mechanism 20 driven by the electric motor 10; an inverter 30 driving the electric motor 10; a housing 40 accommodating the electric motor 10, the compression mechanism 20 and the inverter 30; and a mounting portion 50. That is, the electric compressor 1 is a so-called inverter-integrated electric compressor.

[0013] Reference Figure 3 The electric motor 10 includes a ring-shaped stator 11, a rotor 12, and a coil (not shown) wound around the stator 11. As the electric motor 10, for example, a three-phase AC motor is applied.

[0014] The stator 11 is formed in an annular shape and is composed of, for example, a plurality of silicon steel plates stacked on each other.

[0015] The rotor 12 is arranged radially inside the stator 11 and has a plurality of magnetic poles (not shown). The rotating shaft 10a is embedded in a through hole formed in the radial center of the rotor 12. The rotating shaft 10a is provided integrally with the rotor 12. Each end of the rotating shaft 10a in the long side direction is rotatably supported inside the housing 40. The rotor 12 is rotatably supported radially inside the stator 11 by means of the rotating shaft 10a. If a magnetic field is generated in the stator 11 by power supply from the inverter 30, a rotational force acts on the rotor 12, thereby driving the rotating shaft 10a to rotate. One end of the rotating shaft 10a is connected to the compression mechanism 20 in a manner that can drive the compression mechanism 20.

[0016] The compression mechanism 20 is driven by an electric motor to compress the refrigerant. The compression mechanism 20 and the electric motor 10 are arranged in series inside the housing 40. The compression mechanism 20 is not particularly limited, and is a scroll type compression mechanism having a fixed scroll and a movable scroll. In addition, the compression mechanism 20 is not limited to the scroll type, and a reciprocating type compression mechanism such as a reciprocating type in which a piston connected to a swing plate reciprocates can be adopted.

[0017] The inverter 30 converts a direct current from, for example, a battery (not shown) of a vehicle into an alternating current, and supplies the alternating current to the electric motor 10 .

[0018] The housing 40 constitutes the outer shell of the electric compressor 1. The electric motor 10, the compression mechanism 20 and the inverter 30 are accommodated in the housing 40. The housing 40 is formed with an inlet 40a and an outlet 40b connected to a refrigerant pipe (not shown) of the vehicle air conditioning device. The positions of the inlet 40a and the outlet 40b will be described later.

[0019] In the electric compressor 1, when the electric motor 10 is driven by the inverter 30, the electric motor 10 drives the compression mechanism 20 via its rotating shaft (output shaft) 10a. As a result, the electric compressor 1 sucks the refrigerant (low-pressure refrigerant) of the vehicle air conditioning device from the suction port 40a, compresses it by the compression mechanism 20, and discharges the compressed refrigerant (high-pressure refrigerant) from the discharge port 40b.

[0020] The mounting portion 50 is formed on the housing 40 and is used to mount the housing 40 on a predetermined object C (here, a vehicle body). The mounting portion 50 is formed integrally with the housing 40. The structure and position of the mounting portion 50 will be described later.

[0021] However, the stator 11 of the electric motor 10 is installed (embedded) in the housing 40 by shrink-fitting. During the shrink-fitting, the housing 40 (specifically, the motor housing 41 described later) is heated. Therefore, when the stator 11 is shrink-fitted (assembled), if the mounting portion 50 is heated together with the housing 40, there is a risk that the mounting portion 50 is deformed and the position accuracy of the mounting portion 50 is reduced due to the stator assembly. In this regard, the electric compressor 1 has a structure described below.

[0022] In the electric compressor 1, the housing 40 includes a motor housing 41 that accommodates the electric motor 10, a compression mechanism housing 42 that accommodates the compression mechanism 20, and an inverter housing 43 that accommodates the inverter 30. That is, the housing 40 can be separated into at least the motor housing 41, the compression mechanism housing 42, and the inverter housing 43. Each housing member (41, 42, 43) is mainly formed by casting, for example. And, the housing 40 is formed by integrally fastening each housing member (41, 42, 43) with a fastener such as a bolt.

[0023] In the present embodiment, the motor housing 41 is disposed between the compression mechanism housing 42 and the inverter housing 43. The motor housing 41 has, for example, a barrel portion 411, which is formed into a substantially cylindrical shape in a manner that surrounds the electric motor 10. One end face of the barrel portion 411 abuts against the compression mechanism housing 42, and the other end face of the barrel portion 411 abuts against the inverter housing 43. Furthermore, the suction port 40a is disposed at the inverter side end portion of the barrel portion 411 of the motor housing 41. Furthermore, the stator 11 of the electric motor 10 is assembled inside the barrel portion 411 of the motor housing 41 by heat mounting. During this heat mounting, only the motor housing 41 in the housing 40 is heated.

[0024] In the present embodiment, the compression mechanism housing 42 has a cylinder 421, which is formed into a substantially cylindrical shape in a manner surrounding the compression mechanism 20. One opening of the cylinder 421 is blocked. The end face of the opening side in the cylinder 421 of the compression mechanism housing 42 abuts against the end face of the cylinder 411 of the motor housing 41. The outer diameter of the cylinder 421 of the compression mechanism housing 42 is consistent with the outer diameter of the cylinder 411 of the motor housing 41.

[0025] In the present embodiment, the inverter housing 43 includes, for example, an inverter housing body 431 and an inverter cover 432. The inverter housing 43 is formed into a substantially box-shaped shape that is long in a direction perpendicular to the central axis X of the rotating shaft 10a of the electric motor 10. The inverter housing body 431 includes a bottom wall 431a fixed to the motor housing 41 and a side wall 431b extending from the edge of the bottom wall 431a. The bottom wall 431a is formed into a substantially rectangular shape when viewed from above, and the side wall 431b is formed into a substantially rectangular ring shape when viewed from above toward the bottom wall 431a. The inverter cover 432 is formed into a substantially rectangular flat plate shape when viewed from above. The inverter cover 432 is fixed to the inverter housing body 431 by bolts or the like in a manner that blocks the opening of the inverter housing body 431. The substrate constituting the inverter 30 is fixed to the bottom wall 431a of the inverter housing body 431.

[0026] In the present embodiment, the inverter housing 43 extends further toward the object C than the outer surfaces of the compression mechanism housing 42 and the outer surfaces of the motor housing 41. Specifically, when the inverter housing 43 is fixed to the motor housing 41, one end side portion of the inverter housing 43 in the long side direction extends (protrudes) further toward the object C than the outer surfaces of the compression mechanism housing 42 and the outer surfaces of the motor housing 41.

[0027] Reference Figure 3 In the present embodiment, the object C is located above the housing 40 , and the housing 40 is suspended below the object C via the mounting portion 50 . That is, the electric compressor 1 is suspended below the object C via the mounting portion 50 .

[0028] Next, the structure, position, shape, etc. of the mounting portion 50 will be described in detail.

[0029] The mounting portion 50 is composed of a first mounting foot 51 provided on the compression mechanism housing 42 and a second mounting foot 52 provided on the inverter housing 43. That is, the mounting portion 50 is composed of a plurality of mounting feet, a part of the plurality of mounting feet (the first mounting foot 51) is provided on the compression mechanism housing 42, and the remaining part of the plurality of mounting feet (the second mounting foot 52) ​​is provided on the inverter housing 43. Therefore, the plurality of mounting feet are provided on the housing portion of the housing 40 that is away from the motor housing 41.

[0030] Specifically, the first mounting leg 51 is provided at the top of the object C side in the cylinder 421 of the compression mechanism housing 42. The second mounting leg 52 is provided on the upper surface of the inverter housing 43, that is, the surface on the object C side in the side wall 431b of the inverter case main body 431. The first mounting leg 51 and the second mounting leg 52 extend linearly toward the object C, respectively.

[0031] In the present embodiment, the number (number of roots) of the first mounting leg 51 is one (one), and the number (number of roots) of the second mounting leg 52 is two (two). Therefore, in the present embodiment, the electric compressor 1 is suspended below the object C by means of three hangers (one first mounting leg 51 and two second mounting legs 52). Specifically, when the housing 40 is viewed from above, one first mounting leg 51 is arranged on the top of the cylinder 421 in a manner overlapping with the central axis X, and the two second mounting legs 52 are arranged on the upper surface of the side wall 431b of the inverter housing 43 so as to be separated from each other in a direction orthogonal to the central axis X. When the housing 40 is viewed from above, the central axis X is located between the two second mounting legs 52. Moreover, when the housing 40 is viewed from above, the center of gravity of the electric compressor 1 is located in the inner area of ​​the imaginary triangle formed by the one first mounting leg 51 and the two second mounting legs 52.

[0032] In this embodiment, a seat portion (511, 521) is formed at the top end of each of the first mounting leg portion 51 and the second mounting leg portion 52, and the seat portion (511, 521) has a seat surface (51a, 52a) that abuts against the object C. Internal threads (51b, 52b) are formed in the seat portion (511, 521). Moreover, the seat surface 51a of the seat portion 511 of the first mounting leg portion 51 and the seat surface 52a of the seat portion 521 of the second mounting leg portion 52 are located on the same imaginary plane P.

[0033] Specifically, each seat portion (511, 521) is formed in a disc shape, and each seat surface (51a, 52a) is, for example, a flat circular surface formed by the end surface of the seat portion (511, 521). Furthermore, the internal thread (51b, 52b) is formed downward from the seat surface (51a, 52a) to a predetermined depth.

[0034] A through hole (not shown) is formed in the object C, and the threaded portion of the bolt passing through the through hole is threadedly connected to the internal thread (51b, 52b). As a result, the seat portion 511 of the first mounting leg 51 and the seat portion 521 of the second mounting leg 52 are fastened to the object C. As a result, the housing 40 is mounted on the lower surface of the object C in a manner of being suspended below the object C by the three mounting legs (51, 52, 52).

[0035] In the present embodiment, the total length L1 of the first mounting leg 51 is longer than the total length L2 of the second mounting leg 52. Specifically, the first mounting leg 51 is formed to be longer than the second mounting leg 52 by a distance corresponding to the step in the vertical direction between the top of the cylinder 421 of the compression mechanism housing 42 and the upper surface of the inverter housing 43.

[0036] In this embodiment, the first mounting foot 51 has: the aforementioned seat 511; the foot body 512 formed in a columnar shape (here, a cylindrical shape); and a reinforcing rib 513 extending in the long side direction of the foot along the outer surface (outer peripheral surface) of the foot body 512. Similarly, the second mounting foot 52 has: the aforementioned seat 521; the foot body 522 formed in a columnar shape; and a reinforcing rib 523 extending in the long side direction of the foot along the outer peripheral surface of the foot body 522.

[0037] Figure 4 is a cross-sectional view of the first mounting foot 51, Figure 5 2 is a cross-sectional view of the second mounting leg portion 52 . Figure 4 and Figure 5 This is a cross-sectional view as viewed from the back side of the seat portion (511, 521) (the side opposite to the seat surface (51a, 52a)).

[0038] Specifically, refer to Figure 4 , the reinforcing rib 513 of the first mounting foot 51 has: a first rib 513a, extending in the long side direction of the foot along the motor housing side portion (top) of the outer surface (peripheral surface) of the foot body 512; and a second rib 513b and a third rib 513c that are orthogonal to the first rib 513a. That is, the first mounting foot 51 has a roughly T-shaped cross-section that directs the first rib 513a to the motor housing side. Moreover, the first rib 513a extends parallel to the center axis X at a position that overlaps with the center axis X when viewed in cross section, and the second rib 513b and the third rib 513c extend in a direction orthogonal to the center axis X. Refer to Figures 1 to 3 In the present embodiment, each rib (513a, 513b, 513c) of the first mounting foot 51 is formed in a manner that the ribs are further away from the outer surface of the foot body 512 toward the cylinder 421 of the compression mechanism housing 42. In detail, the edge of each rib (513a, 513b, 513c) is formed in an arc shape as a whole, and each rib (513a, 513b, 513c) has an arc-shaped profile (arc fillet). In addition, in the present embodiment, the base end (root) of the first rib 513a of the first mounting foot 51 is located closer to the foot body 512 side than the motor housing side end surface 421a in the cylinder 421.

[0039] Reference Figure 5, the reinforcing rib 523 of each second mounting foot 52 has: a fourth rib 523a, extending in the long side direction of the foot along the motor housing side portion (top) of the outer surface (peripheral surface) of the foot body 522; and a fifth rib 523b and a sixth rib 523c that are orthogonal to the fourth rib 523a. That is, each second mounting foot 52 has a roughly T-shaped cross-section that directs the fourth rib 523a toward the motor housing side. Moreover, the fourth rib 523a extends parallel to the center axis X, and the second rib 513b and the third rib 513c extend in a direction orthogonal to the center axis X. Refer to Figures 1 to 3 In the present embodiment, each rib (523a, 523b, 523c) of the second mounting leg 52 is formed so as to be further away from the outer surface of the leg body 522 toward the cylinder 421 of the compression mechanism housing 42. Specifically, in the second mounting leg 52, the edge of each rib (523a, 523b, 523c) is formed in an arc shape as a whole, and each rib (523a, 523b, 523c) has an arc-shaped profile (arc fillet).

[0040] As described above, in the electric compressor 1 of the present embodiment, the housing 40 includes the motor housing 41, the compression mechanism housing 42, and the inverter housing 43, and the mounting portion 50 is formed on the housing 40 for mounting the housing 40 on the object C, and the mounting portion 50 is composed of the first mounting leg 51 provided on the compression mechanism housing 42 and the second mounting leg 52 provided on the inverter housing 43. Therefore, the plurality of mounting legs (the first mounting portion 51 and the second mounting portion 52) constituting the mounting portion 50 are provided in the housing portion of the housing 40 that avoids the motor housing 41. That is, the mounting portion 50 is provided in the compression mechanism housing 42 and the inverter housing 43, which are housing portions separated from the motor housing 41 that is heated when the stator 11 is shrink-fitted. As a result, when the stator 11 is shrink-fitted, the mounting portion 50 is not heated together with the motor housing 41, and the position accuracy of the mounting portion 50 converges within the range of the desired required accuracy. Therefore, it is possible to prevent the position accuracy of the mounting portion 50 from being reduced due to the stator assembly. In this way, the electric compressor 1 has a structure that can prevent the position accuracy of the mounting portion 50 from being reduced due to the stator assembly.

[0041] Furthermore, since the inverter case 43 is fixed to the object C via the second mounting leg portions 52 , the inverter case 43 is stably supported. As a result, vibration of the circuit elements of the inverter 30 is suppressed.

[0042] In this embodiment, there is one first mounting leg 51 and two second mounting legs 52. Thus, the mounting portion 50 can stably mount the housing 40 on the object C with a simple structure by means of a three-point support structure formed by three mounting legs (51, 52, 52).

[0043] In the present embodiment, a seat portion (511, 521) is formed at the top end of each of the first mounting leg portion 51 and the second mounting leg portion 52, and the seat portion (511, 521) has a seat surface (51a, 52a) that abuts against the object C. An internal thread (51b, 52b) is formed on the seat portion (511, 521). Thus, the electric compressor 1 can be easily mounted on the object C by means of the mounting portion 50, simply by threading the threaded portion of a bolt extending from the object C side into the internal thread (51b, 52b).

[0044] In the present embodiment, the seat surface 51a of the seat portion 511 of the first mounting leg 51 and the seat surface 52a of the seat portion 521 of the second mounting leg 52 are located on the same imaginary plane P. Thus, when the mounting portion (fastening portion) of the object C to be mounted with respect to the electric compressor 1 is located on the same imaginary plane P, the electric compressor 1 can be easily mounted on the object C.

[0045] In the present embodiment, the total length L1 of the first mounting foot 51 is longer than the total length of the second mounting foot 52, and the first mounting foot 51 includes a foot body 512 and a reinforcing rib 513 extending in the long side direction of the foot along the outer surface of the foot body 512. Thus, in the case where the inverter housing 43 protrudes further toward the object C than the outer surface of the compression mechanism housing 42 and the outer surface of the motor housing 41, and the first mounting foot 51 has to be formed longer than the second mounting foot 52, the strength of the first mounting foot 51 is enhanced by the reinforcing rib 513. As a result, the electric compressor 1 is firmly mounted on the object C, and the durability against vibration can be improved.

[0046] In the present embodiment, the motor housing 41 is arranged between the compression mechanism housing 42 provided with the first mounting foot 51 and the inverter housing 43 provided with the second mounting foot 52. That is, the mounting portion 50 is separately arranged at the end of one side and the end of the other side in the long side direction of the electric compressor 1. Thus, the electric compressor 1 is supported (suspended) by supporting at both ends, thereby constructing a stable support structure of the electric compressor 1. In addition, the first mounting foot 51 has a foot body 512, a first rib 513a, a second rib 513b and a third rib 513c, and has a T-shaped cross-section as a whole. Thus, the strength of the first mounting foot 51, which is longer than the second mounting foot 52, can be more effectively improved, and the improvement of the durability performance against vibration can be more effectively achieved.

[0047] In the present embodiment, the ribs (513a, 513b, 513c) of the first mounting leg 51 are formed so as to be further away from the outer surface (outer peripheral surface) of the leg body 512 as they are closer to the cylinder 421 of the compression mechanism housing 42. As a result, stress concentration on the base of the first mounting leg 51 when vibration occurs can be reduced, and the strength of the base of the first mounting leg 51 can be improved, thereby significantly improving the durability against vibration. The same is true for the second mounting leg 52.

[0048] Hereinafter, a modification of the electric compressor 1 according to the present embodiment will be described.

[0049] Figure 6 1 is an enlarged perspective view for explaining a modified example of the first mounting leg 51. In the present embodiment, the base end portion of the first rib 513a of the first mounting leg 51 is located further away from the motor housing side end surface 421a of the cylinder 421 toward the leg body 512, but the present invention is not limited thereto. Figure 6 As shown, the motor housing side end surface 421 a may also extend into the cylinder portion 421 .

[0050] Specifically, refer to Figure 6 The first rib 513a of the first mounting foot 51 has a rib main body 513a1 and a rib root 513a2. The rib main body 513a1 is formed in a manner that the further it moves away from the outer surface (outer peripheral surface) of the foot main body 512 toward the barrel 421 of the compression mechanism housing 42. In detail, the edge of the rib main body 513a1 is formed in an arc shape, and the rib main body 513a1 has an arc-shaped profile (arc fillet). The rib root 513a2 is a portion constituting the base end portion of the first rib 513a. The rib root 513a2 connects the rib main body 513a1 and the outer surface of the barrel 421 of the compression mechanism housing 42, and extends from the outer surface (outer peripheral surface) of the foot main body 512 to the position of the motor housing side end surface 421a of the barrel 421. That is, the rib root portion 513a2 protrudes radially outward from the outer peripheral surface of the cylinder portion 421, and the rib main body portion 513a1 and the end of the rib root portion 513a2 extend continuously upward. As a result, the strength of the base end portion (root portion) of the first rib 513a as a whole is enhanced by the rib root portion 513a2 formed with the largest width, and the stress concentration at the rib root portion 513a2 (the base end portion of the first mounting leg 51) can be more effectively reduced. In particular, the stress (stress concentration) at the motor housing side end of the base end portion of the first rib 513a is significantly reduced.

[0051] In addition, although not shown in the figure, each rib (513a, 513b, 513c, 523a, 523b, 523c) may extend linearly in the vertical direction. Furthermore, the number of the first mounting leg 51 is not limited to one, but may be two or more, and the number of the second mounting leg 52 is not limited to two, but may be one or three or more.

[0052] Furthermore, there is a case where the mounting portion (fastening portion) of the object C to be mounted on the electric compressor 1 is not located on the same imaginary plane P. In this case, the total length L1 of the first mounting leg 51 and the total length L2 of the second mounting leg 52 are appropriately set according to the distance between the mounting portion of the object C and the compression mechanism housing 42, and the distance between the mounting portion and the inverter housing 43. There is also a case where the total length L1 of the first mounting leg 51 and the total length L2 of the second mounting leg 52 are approximately the same (refer to the enlarged perspective view for explaining another modified example). Figure 7 ), or the overall length L1 of the first mounting leg 51 is shorter than the overall length L2 of the second mounting leg 52 (not shown).

[0053] The description of the present embodiment is an example for explaining the present invention and does not limit the invention described in the claims. In addition, the configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made within the technical scope described in the claims. Description of Reference Numerals

[0054] 1 electric compressor, 10 electric motors, 20 compression mechanism, 30 Inverter, 40 housing, 41 Motor housing, 42 compression mechanism housing, 421 cylinder, 43 Inverter housing, 50 Installation Department, 51 first mounting foot, 51a seat surface, 51b internal thread, 511 seat, 512 foot body, 513 reinforcement rib, 513a first rib, 513b second rib, 513c third rib, 513a1 rib main body, 513a2 rib root, 52 second mounting foot, 52a seat surface, 52b internal thread, 521 seat, 522 foot body, 523 reinforcement rib, 523a the fourth rib, 523b the fifth rib, 523c the sixth rib, C object, L1 The total length of the first mounting foot, L2 The total length of the second mounting foot, P Imaginary plane.

Claims

1. An electric compressor, comprising: an electric motor; a compression mechanism driven by the electric motor; an inverter driving the electric motor; a housing accommodating the electric motor, the compression mechanism and the inverter; and a mounting portion formed on the housing for mounting the housing on a predetermined object, wherein the electric compressor is characterized in that: The housing includes a motor housing for accommodating the electric motor, a compression mechanism housing for accommodating the compression mechanism, and an inverter housing for accommodating the inverter. The mounting portion is composed of a first mounting leg portion provided on the compression mechanism housing and a second mounting leg portion provided on the inverter housing.

2. The electric compressor according to claim 1, characterized in that: The number of the first mounting foot is one, The number of the second mounting feet is two.

3. The electric compressor according to claim 1, characterized in that: A seat portion is formed at the top of each of the first mounting leg and the second mounting leg, and the seat portion has a seat surface that abuts against the object. An internal thread is formed on the seat portion, The seat surface of the first mounting leg and the seat surface of the second mounting leg are located on the same imaginary plane.

4. The electric compressor according to claim 1, characterized in that: The inverter housing protrudes further toward the object than the outer surface of the compression mechanism housing and the outer surface of the motor housing. The overall length of the first mounting foot is longer than the overall length of the second mounting foot, The first mounting foot has a foot body formed in a columnar shape and a reinforcing rib extending in a long side direction of the foot along an outer surface of the foot body.

5. The electric compressor according to claim 4, characterized in that: The motor housing is disposed between the compression mechanism housing and the inverter housing. The compression mechanism housing has a cylindrical portion surrounding the compression mechanism. The reinforcing rib of the first mounting leg includes: a first rib extending in the long side direction of the leg along a motor housing side portion of the outer surface of the leg body; and second and third ribs orthogonal to the first rib.

6. The electric compressor according to claim 5, characterized in that: The first rib, the second rib, and the third rib are formed so as to be separated from the outer surface of the leg body as they go toward the cylindrical portion of the compression mechanism housing.

7. The electric compressor according to claim 5, characterized in that: The first rib has: a rib body portion formed so as to be separated from an outer surface of the leg body as it moves toward the cylindrical portion of the compression mechanism housing; and The rib root portion connects the rib main body portion and the outer surface of the cylindrical portion of the compression mechanism housing, and extends from the outer surface of the leg body to a position of an end surface of the cylindrical portion on the motor housing side.

8. The electric compressor according to any one of claims 1 to 7, characterized in that: The object is located above the housing. The housing is suspended below the object via the mounting portion.

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