Electric compressor

Abstract

To provide an electric compressor that can restrain corrosion from progressing inside a housing.SOLUTION: An electric compressor 10 comprises: a compression part 30 for compressing fluid; an electric motor 40 for driving the compression part 30; an inverter 50 for driving the electric motor 40; a housing 20 housing the compression part 30, the electric motor 40, and the inverter 50; and a soundproof cover 60 covering the housing 20. The housing 20 comprises a first housing component 21, a second housing component 22, a third housing component 23, and a fourth housing component 24. The soundproof cover 60 comprises respective opposed parts 70, 80, and 90 opposed to the housing 20. The respective opposed parts 70, 80, and 90 are provided with groove parts 100 surrounding respective boundaries Bd1, Bd2, and Bd3 while separating from the respective boundaries Bd1, Bd2, and Bd3.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an electric compressor.

Background Art

[0002] An electric compressor includes a compression part, an electric motor, an inverter, and a cylindrical housing. The compression part compresses a fluid. The electric motor drives the compression part. The inverter drives the electric motor. The compression part, the electric motor, and the inverter are housed in the housing. The direction in which the axis of the housing extends is defined as the axial direction.

[0003] For example, in the electric compressor described in Patent Document 1, the housing has a plurality of housing components that can be divided in the axial direction. For example, the compressor for a refrigerator described in Patent Document 2 includes a soundproof cover that covers the outer peripheral surface of a casing as the housing.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] For the purpose of reducing the noise of the electric compressor described in Patent Document 1, it is conceivable to cover the housing with the soundproof cover described in Patent Document 2. By the way, the soundproof cover may be formed of an elastically deformable sound-absorbing material, for example, a urethane material. The soundproof cover formed of such a material is likely to absorb moisture in the surroundings.

[0006] For example, depending on the environment in which the electric compressor is used, a large amount of moisture is absorbed by the soundproof cover. Therefore, since the moisture absorbed by the soundproof cover stays near the housing, there is a risk that the corrosion of the housing will progress. In particular, when the moisture absorbed by the soundproof cover stays at the boundary between adjacent housing components, there is a risk that the corrosion of the housing will progress inside the housing.

Means for Solving the Problems

[0007] The electric compressor that solves the above problems includes a compression unit that compresses a fluid, an electric motor that drives the compression unit, an inverter that drives the electric motor, a housing that houses the compression unit, the electric motor, and the inverter, and a soundproof cover that covers the housing. The housing has a plurality of housing components. The soundproof cover has a facing portion that faces the housing, and a groove portion that surrounds the boundary while moving away from the boundary between adjacent housing components is provided in the facing portion.

[0008] According to the above configuration, the groove portion provided in the facing portion of the soundproof cover can separate the boundary between adjacent housing components and the soundproof cover. Therefore, it is difficult for the water absorbed by the soundproof cover to stay at the boundary between adjacent housing components. Therefore, it is possible to suppress the progress of corrosion inside the housing.

[0009] In the above electric compressor, it is preferable that the groove portion is continuously provided along the boundary. According to the above configuration, by continuously providing the groove portion along the boundary between adjacent housing components, it becomes easier to keep the interval between the boundary between adjacent housing components and the facing portion of the soundproof cover long in the direction in which the boundary extends. That is, it becomes easier to form a longer portion where the boundary between adjacent housing components and the facing portion of the soundproof cover are separated.

[0010] In the above electric compressor, the soundproof cover may have an opening formed so that a portion of the housing is exposed to the outside, and a partition wall separating the groove from the opening.

[0011] According to the above configuration, the partition wall prevents water from entering through the opening and reaching the groove. Therefore, even if an opening is formed in the soundproof cover, water is less likely to enter the groove. Therefore, even if an opening is formed in the soundproof cover, water is less likely to accumulate between the soundproof cover and the housing.

[0012] An electric compressor that solves the above problem comprises a compression section that compresses a fluid, an electric motor that drives the compression section, an inverter that drives the electric motor, a housing that accommodates the compression section, the electric motor, and the inverter, and a soundproof cover that covers the housing, wherein the housing is an electric compressor having a plurality of housing components, and the soundproof cover has an opposing portion that faces the housing and further comprises a spacing portion that keeps the opposing portion separated from the boundary between adjacent housing components.

[0013] According to the above configuration, the spacing portion can separate the boundary between adjacent housing components from the soundproof cover, which makes it difficult for water absorbed by the soundproof cover to remain at the boundary between adjacent housing components, thereby suppressing the progression of corrosion inside the housing.

[0014] In the above electric compressor, the spacing portion may be a rib integrally formed with the opposing portion. According to the above configuration, the spacing retaining portion is part of the soundproof cover. Therefore, when the housing is covered with the soundproof cover, the boundary between adjacent housing components can be separated from the opposing portion of the soundproof cover. Therefore, compared to when the spacing retaining portion is configured separately from the soundproof cover or the housing, it is easier to simply maintain the distance between the boundary between adjacent housing components and the opposing portion of the soundproof cover.

[0015] In the above-described electric compressor, the interval holding portion may be a rib integrally formed on at least one of the adjacent housing components that form the boundary. According to the above configuration, the interval holding portion is part of the housing component. Therefore, when the housing is covered with the soundproof cover, the soundproof cover is pushed by the rib formed on the housing component. Thus, by covering the housing with the soundproof cover, the boundary between the adjacent housing components and the opposing portion of the soundproof cover can be separated. Therefore, compared with the case where the interval holding portion is a separate configuration from the soundproof cover or the housing, it becomes easier to simply hold the interval between the boundary of the adjacent housing components and the opposing portion of the soundproof cover.

[0016] In the above-described electric compressor, the rib may be disposed at a position sandwiching the boundary. According to the above configuration, by disposing the rib at a position sandwiching the boundary between the adjacent housing components, it becomes easier to hold the interval between the boundary of the adjacent housing components and the opposing portion of the soundproof cover. Therefore, it is possible to further suppress the progress of corrosion inside the housing.

[0017] In the above-described electric compressor, the rib may continuously extend along the boundary. According to the above configuration, by continuously extending the rib along the boundary between the adjacent housing components, it becomes easier to hold the interval between the boundary of the adjacent housing components and the opposing portion of the soundproof cover long in the extending direction of the boundary. That is, it becomes easier to form a longer portion where the boundary between the adjacent housing components and the opposing portion of the soundproof cover are separated.

[0018] In the above-described electric compressor, the soundproof cover has an opening formed such that a part of the housing is exposed to the outside, and an opening rib integrally formed on the opposing portion and provided around the opening, and the opening rib may be connected to the rib.

[0019] According to the above configuration, even if an opening is formed in the soundproof cover, the water absorbed by the opening rib is guided to the rib. That is, the opening rib can control the flow of water entering the opening. Therefore, it is difficult for the water entering from the opening to reach the boundary of the adjacent housing structure. Accordingly, it is difficult for the water absorbed from the opening rib, and thus the water absorbed by the soundproof cover, to stay at the boundary of the adjacent housing structure.

[0020] In the above electric compressor, the opening may be formed such that a part of the boundary is exposed to the outside, and the opening rib may be arranged to contact a part of the boundary. According to the above configuration, a space is formed between the soundproof cover and the housing by the spacing holding portion. Water that has entered the space between the soundproof cover and the housing through the opening of the soundproof cover is absorbed by the opening rib when it reaches the opening rib. Therefore, even if an opening is formed in the soundproof cover, it is difficult for water to accumulate between the soundproof cover and the housing.

[0021] In the above electric compressor, the rib may be arranged at a position sandwiching the boundary, and the opening rib may be arranged to be integral with the two ribs sandwiching the boundary.

[0022] According to the above configuration, when water that has entered from the opening of the soundproof cover enters between the two ribs sandwiching the boundary, the entering water is blocked by the opening rib. For this reason, it becomes difficult for water to enter after the opening rib in the direction in which the boundary extends.

[0023] In the above electric compressor, the spacing holding portion is a rib integrally formed with the opposing portion, the rib is arranged at a position sandwiching the boundary and continuously extends along the boundary, the soundproof cover has an opening formed such that a part of the boundary is exposed to the outside, and an opening rib integrally formed with the opposing portion and arranged to contact a part of the boundary, and the opening rib may be integrally formed with the two ribs sandwiching the boundary.

[0024] According to the above configuration, when water enters through the opening of the soundproof cover and flows between two ribs that sandwich the boundary between adjacent housing components, the water is blocked by the opening rib, making it difficult for water to enter beyond the opening rib in the circumferential direction of the housing.

[0025] Furthermore, water absorbed by the opening rib penetrates not only into the opposing portion but also into the two ribs. In other words, water is less likely to remain in the opening rib. Therefore, even if the opening rib contacts the boundary between adjacent housing components, corrosion of the housing at the contacting portion is less likely to progress.

[0026] In the above-described electric compressor, the housing constituent body may include at least a first inverter chamber constituent body and a second inverter chamber constituent body that define an inverter chamber that accommodates the inverter, and the boundary may include at least a boundary between the first inverter chamber constituent body and the second inverter chamber constituent body.

[0027] According to the above configuration, corrosion is less likely to progress from the boundary between the first inverter chamber constituent and the second inverter chamber constituent to the inside of the housing, thereby preventing water from reaching the inverter and causing a short circuit or stopping the function of driving the electric motor. [Effects of the Invention]

[0028] According to this invention, the progression of corrosion inside the housing can be suppressed. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a cross-sectional view of a first embodiment of an electric compressor. [Diagram 2] 4 is an enlarged cross-sectional view showing a groove portion of a first opposing portion of the soundproof cover. FIG. [Figure 3] 10 is an enlarged cross-sectional view showing a groove portion of a second opposing portion of the soundproof cover. FIG. [Figure 4] 10 is an enlarged cross-sectional view showing a groove portion of a third opposing portion of the soundproof cover. FIG. [Figure 5] It is a perspective view of a second embodiment of an electric compressor. [Figure 6] It is a cross-sectional view taken along line 6-6 of FIG. 5. [Figure 7] It is an enlarged perspective view showing a partially enlarged third embodiment of an electric compressor. [Figure 8] It is a cross-sectional view taken along line 8-8 of FIG. 7. [Figure 9] It is a cross-sectional view taken along line 9-9 of FIG. 7. [Figure 10] It is an enlarged perspective view showing a partially enlarged modified example of an electric compressor.

Mode for Carrying Out the Invention

[0030] [First Embodiment] Hereinafter, a first embodiment in which an electric compressor is embodied will be described with reference to FIGS. 1 to 4. The electric compressor of this embodiment is used, for example, in a vehicle air conditioner.

[0031] <Electric Compressor> As shown in FIG. 1, the electric compressor 10 includes a cylindrical housing 20, a compression section 30, an electric motor 40, an inverter 50, and a soundproof cover 60.

[0032] The direction in which the axis m of the housing 20 extends is defined as the axial direction A. The direction orthogonal to the axis m of the housing 20 is defined as the radial direction B. The direction in which a circle drawn around the axis m of the housing 20 extends is defined as the circumferential direction C.

[0033] The compression section 30 compresses the refrigerant as a fluid. The compression section 30 is of a scroll type composed of a fixed scroll and a movable scroll (not shown). The electric motor 40 drives the compression section 30. The compression section 30 compresses the refrigerant sucked into the housing 20 as the electric motor 40 is driven.

[0034] The inverter 50 drives the electric motor 40. The housing 20 houses the compression unit 30, the electric motor 40, and the inverter 50. The compression unit 30, the electric motor 40, and the inverter 50 are arranged in this order in the axial direction A inside the housing 20. The soundproof cover 60 covers the housing 20.

[0035] <Housing> The housing 20 is made of metal. The housing 20 is, for example, made of aluminum. The housing 20 has a plurality of housing components arranged in the axial direction A. The plurality of housing components include a first housing component 21, a second housing component 22, a third housing component 23, and a fourth housing component 24.

[0036] The first housing component 21 has an end wall 21a and a peripheral wall 21b. The peripheral wall 21b is cylindrical. The peripheral wall 21b extends from the outer peripheral portion of the end wall 21a. The axis of the peripheral wall 21b coincides with the axis m of the housing 20. The peripheral wall 21b has an outer peripheral surface 21c. The end wall 21a has an outer surface 21d. The outer surface 21d is continuous with the outer peripheral surface 21c. The compression unit 30 and the electric motor 40 are housed in the first housing component 21.

[0037] A motor chamber S1 is formed inside the first housing component 21. The motor chamber S1 is a space surrounded by the end wall 21a and the peripheral wall 21b. The electric motor 40 is housed in the motor chamber S1. The refrigerant compressed by the compression unit 30 is inhaled into the motor chamber S1. The motor chamber S1 also serves as an intake chamber into which the refrigerant compressed by the compression unit 30 is inhaled.

[0038] The second housing component 22 has an end wall 22a and a peripheral wall 22b. The peripheral wall 22b is cylindrical. The peripheral wall 22b extends from the outer peripheral portion of the end wall 22a. The peripheral wall 22b has an outer peripheral surface 22c. The end wall 22a has an outer surface 22d. The outer surface 22d is continuous with the outer peripheral surface 22c.

[0039] The first housing component 21 and the second housing component 22 are connected in the axial direction A with a first seal member 101 sandwiched therebetween. An end 21e of the peripheral wall 21b located opposite the end wall 21a and an end 22e of the peripheral wall 22b located opposite the end wall 22a are butted against each other with the first seal member 101 sandwiched therebetween. The first seal member 101 is, for example, a gasket. The first housing component 21 and the second housing component 22 are fixed together with bolts (not shown).

[0040] A discharge chamber S2 is formed within the second housing component 22. The refrigerant compressed in the compression section 30 is discharged into the discharge chamber S2. The refrigerant discharged from the compression section 30 into the discharge chamber S2 is then discharged to the outside of the housing 20 through a discharge port (not shown). The first seal member 101 maintains the airtightness of the discharge chamber S2.

[0041] The third housing component 23 has an end wall 23a, a peripheral wall 23b, and a bottom wall 23g. The bottom wall 23g is plate-shaped. The peripheral wall 23b is cylindrical. The peripheral wall 23b extends from the outer periphery of the bottom wall 23g. The peripheral wall 23b has an outer peripheral surface 23c. The end wall 23a protrudes from a part of the bottom wall 23g toward the opposite side to the peripheral wall 23b. The end wall 23a and the bottom wall 23g have outer surfaces 23d. The outer surface 23d of the bottom wall 23g is continuous with the outer peripheral surface 23c.

[0042] The third housing component 23 and the first housing component 21 are connected in the axial direction A with a second seal member 102 sandwiched therebetween. An end wall 23a of the third housing component 23 and an end wall 21a of the first housing component 21 abut against each other with the second seal member 102 sandwiched therebetween. The second seal member 102 is a grommet.

[0043] A bottom wall 23g of the third housing component 23 has a shape that partially protrudes beyond the first housing component 21 in the radial direction B. An outer surface 23d of the bottom wall 23g of the third housing component 23 has an exposed surface 23e that protrudes from the first housing component 21 in the radial direction B. The third housing component 23 and the first housing component 21 are fixed together with bolts (not shown).

[0044] The fourth housing component 24 closes the opening of the peripheral wall 23b of the third housing component 23. The fourth housing component 24 and the third housing component 23 are connected in the axial direction A with a third seal member 103 sandwiched therebetween. The fourth housing component 24 and an end portion 23f of the peripheral wall 23b, located on the opposite side from the end wall 23a, are abutted against each other with the third seal member 103 sandwiched therebetween. The third seal member 103 is, for example, a gasket. The third housing component 23 and the fourth housing component 24 define an inverter chamber S3. The third seal member 103 maintains the airtightness of the inverter chamber S3. The inverter 50 is accommodated in the inverter chamber S3. The housing component includes at least the third housing component 23 as a first inverter chamber component and the fourth housing component 24 as a second inverter chamber component that define the inverter chamber S3. It is also possible to use the fourth housing component 24 as the first inverter chamber component and the third housing component 23 as the second inverter chamber component.

[0045] The inverter 50 is electrically connected to the electric motor 40 via a hermetic terminal 104. The hermetic terminal 104 penetrates the end wall 23a of the third housing component 23, the end wall 21a of the first housing component 21, and the second seal member 102. The hermetic terminal 104 is provided on the end walls 21a, 23a to maintain the airtightness of the motor chamber S1 and the inverter chamber S3. The second seal member 102 seals against water flowing from between the end walls 21a, 23a toward the hermetic terminal 104.

[0046] The fourth housing structure 24 has a first outer surface 24a and a second outer surface 24b. The first outer surface 24a is the outer peripheral surface of the fourth housing structure 24. The second outer surface 24b is a surface located on the side opposite to the third housing structure 23 in the axial direction A. The second outer surface 24b is continuous with the first outer surface 24a.

[0047] <Boundary of adjacent housing structures> The housing 20 has a first boundary Bd1, a second boundary Bd2, and a third boundary Bd3. Each of the boundaries Bd1, Bd2, Bd3 extends over the entire circumference in the circumferential direction C of the housing 20. Each of the boundaries Bd1, Bd2, Bd3 is annular. Each of the boundaries Bd1, Bd2, Bd3 is the boundary of adjacent housing structures.

[0048] The first boundary Bd1 is the boundary between the end 21e of the first housing structure 21 and the end 22e of the second housing structure 22. In the present embodiment, the first boundary Bd1 is the position where the first seal member 101 is provided.

[0049] The second boundary Bd2 is the boundary between the end wall 23a of the third housing structure 23 and the end wall 21a of the first housing structure 21. In the present embodiment, the second boundary Bd2 is the position where the second seal member 102 is provided.

[0050] The third boundary Bd3 is the boundary between the fourth housing structure 24 and the end 23f of the third housing structure 23. In the present embodiment, the third boundary Bd3 is the position where the third seal member 103 is provided. Each of the boundaries Bd1, Bd2, Bd3 includes at least the third boundary Bd3 between the third housing structure 23 as the first inverter chamber structure and the fourth housing structure 24 as the second inverter chamber structure.

[0051] <Soundproof cover> The soundproof cover 60 covers the outer surface 20a of the housing 20. The outer surface 20a of the housing 20 is formed by an outer surface 22d, an outer peripheral surface 22c, an outer peripheral surface 21c, an exposed surface 23e, an outer peripheral surface 23c, a first outer surface 24a, and a second outer surface 24b. The outer surface 20a of the housing 20 forms the outer shape of the housing 20. The soundproof cover 60 has a shape along the outer shape of the housing 20.

[0052] The soundproof cover 60 is formed of, for example, a resin material that can be elastically deformed. The soundproof cover 60 is formed of, for example, a urethane material. The soundproof cover 60 is composed of a first cover body and a second cover body (not shown). Note that the soundproof cover 60 may be formed of any material as long as it has a soundproof function. The soundproof cover 60 is not limited to a resin material such as a urethane material, and may be formed of non-woven fabric, ethylene propylene rubber cloth, glass wool, or the like. The soundproof cover 60 may be configured in a two-layer structure or a three-layer structure or more, such as being formed of urethane on the inside and a resin material other than urethane on the outside. Also, the number of cover bodies constituting the soundproof cover 60 may be three or more.

[0053] The soundproof cover 60 has a first opposing portion 70, a second opposing portion 80, and a third opposing portion 90. Each of the opposing portions 70, 80, 90 is an opposing portion that opposes the housing 20. The first opposing portion 70 opposes the first boundary Bd1 in the radial direction B. The second opposing portion 80 opposes the second boundary Bd2 in the radial direction B. The third opposing portion 90 opposes the third boundary Bd3 in the radial direction B. Groove portions 100 are provided at positions on each of the opposing portions 70, 80, 90 that oppose the respective boundaries Bd1, Bd2, Bd3.

[0054] As shown in FIGS. 2, 3, and 4, the groove portion 100 has at least a first spaced apart surface 100a and a second spaced apart surface 100b. The first spaced apart surface 100a is a surface provided at a position sandwiching each boundary Bd1, Bd2, and Bd3 in the axial direction A. The first spaced apart surface 100a intersects with the adjacent housing components that form each boundary Bd1, Bd2, and Bd3. The first spaced apart surface 100a is a surface extending in the radial direction B. In this embodiment, the first spaced apart surface 100a is annular in the circumferential direction C. Note that the first spaced apart surface 100a does not have to extend in the radial direction B. For example, the first spaced apart surface 100a may extend in a direction inclined with respect to the axial direction A.

[0055] The second separation surface 100b is a surface provided at a position away from each boundary Bd1, Bd2, Bd3 in the radial direction B. In this embodiment, the second separation surface 100b is continuous with the first separation surface 100a and is annular in the circumferential direction C. That is, the groove portion 100 surrounds each boundary Bd1, Bd2, Bd3 while being spaced away from each boundary Bd1, Bd2, Bd3. The groove portion 100 surrounds the entire circumference of each boundary Bd1, Bd2, Bd3. The groove portion 100 is provided continuously along each boundary Bd1, Bd2, Bd3.

[0056] [Operation of this embodiment] The operation of this embodiment will be described. In this embodiment, when the compression unit 30 and the electric motor 40 are driven, noise is generated through the housing 20. However, since the housing 20 is covered with the soundproof cover 60, the noise of the electric compressor 10 is reduced.

[0057] Furthermore, the grooves 100 provided in the opposing portions 70, 80, and 90 of the soundproof cover 60 can separate the boundaries Bd1, Bd2, and Bd3 from the soundproof cover 60. [Effects of this embodiment] The effects of this embodiment will be described.

[0058] (1-1) The groove portions 100 provided in the opposing portions 70, 80, 90 of the soundproof cover 60 can separate each boundary Bd1, Bd2, Bd3 from the soundproof cover 60. Therefore, the water absorbed by the soundproof cover 60 is less likely to stay at each boundary Bd1, Bd2, Bd3 of the adjacent housing components. Accordingly, it is possible to suppress the progress of corrosion inside the housing 20.

[0059] (1-2) The groove portions 100 are continuously provided along each boundary Bd1, Bd2, Bd3. Thereby, it becomes easier to keep the interval between each boundary Bd1, Bd2, Bd3 and each opposing portion 70, 80, 90 long in the direction in which each boundary Bd1, Bd2, Bd3 extends. That is, it becomes easier to form a longer separated portion between each boundary Bd1, Bd2, Bd3 and each opposing portion 70, 80, 90. Therefore, it is possible to further suppress the progress of corrosion inside the housing 20.

[0060] (1-3) The groove portion 100 of the third opposing portion 90 makes it difficult for corrosion to progress from the third boundary Bd3 into the housing 20. That is, it is difficult for corrosion to progress in the third seal member 103, the end portion 23f of the third housing component 23, and the fourth housing component 24. Therefore, it is possible to suppress leakage due to water reaching the inverter 50 and the stop of the function of driving the electric motor 40.

[0061] (1-4) The groove portion 100 of the first opposing portion 70 makes it difficult for corrosion to progress from the first boundary Bd1 into the housing 20. It is difficult for corrosion to progress in the first seal member 101, the end portion 21e of the first housing component 21, and the end portion 22e of the second housing component 22. Therefore, it is possible to suppress the leakage of the refrigerant from the discharge chamber S2 through the first boundary Bd1.

[0062] (1-5) The groove 100 of the second opposing portion 80 makes it difficult for corrosion to progress from the second boundary Bd2 to the inside of the housing 20. Corrosion of the second seal member 102, the end wall 21a of the first housing component 21, and the end wall 23a of the third housing component 23 is also difficult to progress. This makes it possible to prevent leakage of electricity from the airtight terminal 104. This in turn makes it possible to prevent leakage of electricity from the electric motor 40 and the inverter 50 and stoppage of the function of driving the electric motor 40.

[0063] (1-6) The groove 100 surrounds the entire periphery of each boundary Bd1, Bd2, Bd3. Because the soundproof cover 60 does not come into contact with each boundary Bd1, Bd2, Bd3, water does not remain at each boundary Bd1, Bd2, Bd3. This prevents corrosion of the housing 20 from progressing inward.

[0064] [Second embodiment] A second embodiment of an electric compressor will be described below with reference to Figures 5 and 6. The main difference between this embodiment and the first embodiment is that the configuration of the soundproof cover 60 has been changed. This difference will be described in detail, and the same components as those in the first embodiment will be denoted by the same reference numerals and will not be described in detail again.

[0065] <Soundproof cover> As shown in FIG. 5, the soundproof cover 60 has an opening 65. The opening 65 is formed by omitting a portion of the soundproof cover 60. The opening 65 is formed so as to expose a portion of the housing 20 to the outside. The opening 65 exposes a portion of the third boundary Bd3 to the outside. By forming the opening 65, a portion of the outer peripheral surface 23c and a portion of the exposed surface 23e of the third housing component 23 are exposed to the outside. By forming the opening 65, a portion of the first outer surface 24a and a portion of the second outer surface 24b of the fourth housing component 24 are exposed to the outside.

[0066] <Reasons for forming openings> When the electric compressor 10 is mounted on a vehicle, depending on the arrangement and shape of the other components mounted on the vehicle, it is necessary to avoid contact between the other components and the electric compressor 10. In order to avoid contact between the other components and the electric compressor 10, an opening 65 is formed in the soundproof cover 60.

[0067] <Relationship between openings and grooves> The relationship between the opening 65 and the groove 100 will be described below with reference to Fig. 6. Fig. 6 is a cross-sectional view taken along line 6-6 in Fig. 5 so that the surface of the end 23f of the third housing component 23 that comes into contact with the third seal member 103 can be seen from the front. Note that the groove 100 described below is the groove 100 of the third opposing portion 90.

[0068] As shown in FIG. 6 , the groove portion 100 extends continuously along the third boundary Bd3, as in the first embodiment. The groove portion 100 does not communicate with the opening 65. Specifically, the soundproof cover 60 has closing portions 66 at both ends of the groove portion 100 as partition walls that close the groove portion 100. The closing portions 66 separate the groove portion 100 from the opening 65. The closing portions 66 are formed integrally with the soundproof cover 60. The closing portions 66 span the first separating surface 100a. The closing portions 66 contact the outer peripheral surface 23c and the first outer surface 24a, as well as the third boundary Bd3.

[0069] [Operation of this embodiment] The operation of this embodiment will be described. Both ends of the groove 100 are closed by the closing portions 66. Furthermore, the groove 100 is not in communication with the opening 65 of the soundproof cover 60 due to the closing portions 66. Therefore, even if the opening 65 is formed in the soundproof cover 60, water is unlikely to enter the groove 100.

[0070] [Effects of this embodiment] In this embodiment, the same effects as those (1-1), (1-2), (1-3), (1-4), and (1-5) of the first embodiment can be achieved, and the following effects can also be achieved.

[0071] (2-1) Water that has entered through the opening 65 is less likely to reach the groove 100 due to the blocking portion 66. In this embodiment, the blocking portion 66 prevents the groove 100 from communicating with the opening 65. Therefore, even if the opening 65 is formed in the soundproof cover 60, water is less likely to accumulate between the soundproof cover 60 and the housing 20.

[0072] (2-2) Even if water adheres to the third boundary Bd3 exposed to the outside by the opening 65, the third seal member 103 makes it difficult for the water to enter the housing 20. Furthermore, even if water adheres to the third boundary Bd3, the water easily flows along the outer peripheral surface 23c of the third housing component 23 and the first outer surface 24a of the fourth housing component 24. Therefore, even if the opening 65 makes it easier for water to adhere to the third boundary Bd3, the water is unlikely to remain at the third boundary Bd3. This makes it possible to suppress the progression of corrosion inside the housing 20. Furthermore, it is possible to at least prevent leakage of electricity caused by water reaching the inverter 50.

[0073] [Third embodiment] A third embodiment of an electric compressor will be described below with reference to Figures 7, 8, and 9. The same components as those in the first and second embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. Figure 9 is a cross-sectional view taken along line 9-9 in Figure 7 so that the surface of the end 23f of the third housing component 23 that comes into contact with the third seal member 103 can be seen from the front.

[0074] <Soundproof cover> As shown in FIG. 7, the soundproof cover 60 of this embodiment has basically the same configuration as the soundproof cover 60 of the second embodiment.

[0075] The soundproof cover 60 of this embodiment does not have the groove portion 100 provided in the third opposing portion 90 of the soundproof cover 60 of the first and second embodiments. The electric compressor 10 has two ribs 201 as spacing portions. Each rib 201 is integrally formed with the third opposing portion 90. The two ribs 201 are aligned in the axial direction A. The ribs 201 are disposed at positions sandwiching the third boundary Bd3. One of the two ribs 201 is in contact with the outer peripheral surface 23c of the third housing component 23. The remaining one of the two ribs 201 is in contact with the first outer surface 24a of the fourth housing component 24. Thus, each rib 201 keeps the third opposing portion 90 and the third boundary Bd3 apart.

[0076] 9, the rib 201 extends continuously along the third boundary Bd3. The rib 201 extends continuously such that a first end 201a of the rib 201 is connected to the opening 65, and a second end 201b of the rib 201 is connected to the opening 65. A space Sp surrounded by the two ribs 201 and the third opposing portion 90 extends continuously along the third boundary Bd3. The space Sp communicates with the opening 65.

[0077] As shown in FIGS. 8 and 9, the soundproof cover 60 has two opening ribs 202. Each opening rib 202 is integrally formed with the third opposing portion 90. Each opening rib 202 is arranged so as to contact the third boundary Bd3. Each opening rib 202 is provided around the opening 65 in the space Sp. Each opening rib 202 is arranged so as to be integral with the two ribs 201 that sandwich the third boundary Bd3. The opening rib 202 is formed integrally with the two ribs 201 that sandwich the third boundary Bd3. In other words, the opening rib 202 blocks the vicinity of the opening 65 in the space Sp.

[0078] [Operation of this embodiment] The operation of this embodiment will be described. In the present embodiment, the third boundary Bd3 of the adjacent housing structures and the soundproof cover 60 can be separated by the respective ribs 201 as the spacing maintaining portions. Therefore, the water absorbed by the soundproof cover 60 is less likely to stay at the third boundary Bd3.

[0079] Also, the water that enters the space Sp through the opening 65 of the soundproof cover 60 is absorbed by the opening rib 202 when it reaches the opening rib 202. The water absorbed by the opening rib 202 penetrates toward the third facing portion 90.

[0080] [Effects of the Present Embodiment] In the present embodiment, the same effects as those of (1-4), (1-5), and (2-2) of the first and second embodiments are achieved, and the following effects can be obtained.

[0081] (3-1) The third boundary Bd3 of the adjacent housing structures and the soundproof cover 60 can be separated by the rib 201. Therefore, the progress of corrosion inside the housing 20 can be suppressed.

[0082] (3-2) Each rib 201 as the spacing maintaining portion is part of the soundproof cover 60. Therefore, when the housing 20 is covered with the soundproof cover 60, the third boundary Bd3 and the third facing portion 90 of the soundproof cover 60 can be separated. Therefore, compared with the case where the spacing maintaining portion has a separate configuration from the soundproof cover 60 or the housing 20, it becomes easier to simply maintain the spacing between the third boundary Bd3 and the third facing portion 90 of the soundproof cover 60.

[0083] (3-3) The rib 201 is arranged at a position sandwiching the third boundary Bd3 in the axial direction A. Such a rib 201 makes it easier to maintain the spacing between the third boundary Bd3 and the third facing portion 90 of the soundproof cover 60. Therefore, the progress of corrosion inside the housing 20 can be further suppressed.

[0084] (3-4) By the rib 201 continuously extending along the third boundary Bd3, it becomes easier to maintain a long interval between the third boundary Bd3 and the third opposing portion 90 of the soundproof cover 60 in the direction in which the third boundary Bd3 extends. That is, it becomes easier to form a longer section where the third boundary Bd3 and the third opposing portion 90 of the soundproof cover 60 are separated. Therefore, the progress of corrosion inside the housing 20 can be more effectively suppressed.

[0085] (3-5) An opening rib 202 is provided around the opening 65. Then, the opening rib 202 is connected to the rib 201. Even if the opening 65 is formed in the soundproof cover 60, the water absorbed by the opening rib 202 is guided to the rib 201. That is, the flow of water entering the opening 65 can be controlled by the opening rib 202. Therefore, it is difficult for the water entering from the opening 65 to reach the third boundary Bd3. Consequently, it becomes difficult for the water absorbed by the opening rib 202, and thus the water absorbed by the soundproof cover 60, to remain at the third boundary Bd3.

[0086] (3-6) When the water entering the space Sp through the opening 65 reaches the opening rib 202, it is absorbed by the opening rib 202. For this reason, even if the opening 65 is formed in the soundproof cover 60, it is difficult for water to accumulate between the soundproof cover 60 and the housing 20.

[0087] (3-7) The opening rib 202 is arranged to be integrated with the two ribs 201 sandwiching the third boundary Bd3. For this reason, if water entering from the opening 65 enters between the two ribs 201 sandwiching the third boundary Bd3, the water is blocked by the opening rib 202. In the circumferential direction C of the housing 20, it becomes difficult for water to enter after the opening rib 202.

[0088] (3-8) The opening rib 202 is integrally formed with two ribs 201 sandwiching the third boundary Bd3. Therefore, when water that has entered from the opening 65 enters between the two ribs 201 sandwiching the third boundary Bd3, the water is blocked by the opening rib 202. Then, the water absorbed by the opening rib 202 not only penetrates into the third opposing portion 90 but also penetrates into each rib 201. That is, it becomes difficult for water to stay in the opening rib 202. Therefore, even if the opening rib 202 is in contact with the third boundary Bd3, corrosion of the housing 20 at the portion where the opening rib 202 is in contact progresses less easily.

[0089] [Modification Example] In addition, each of the above embodiments can be implemented with the following modifications. The above embodiments and the following modification examples can be implemented in combination with each other as long as they do not technically conflict with each other.

[0090] ○ In the first and second embodiments, the groove portion 100 may be provided in at least one of the opposing portions 70, 80, 90. That is, if there is a groove portion 100 surrounding at least one of the boundaries Bd1, Bd2, Bd3, it is possible to at least suppress the progress of corrosion inside the housing 20. Note that at least one of the opposing portions 70, 80, 90 includes only the first opposing portion 70, only the second opposing portion 80, only the third opposing portion 90, combinations of two of the opposing portions 70, 80, 90, and all of the opposing portions 70, 80, 90.

[0091] [[ID=...]] ○ In the second embodiment, the portion exposed to the outside by the opening 65 may be, for example, only a part of the outer peripheral surface 23c of the third housing component 23 and a part of the first outer surface 24a of the fourth housing component 24.

[0092] ○ In the second embodiment, the soundproof cover 60 may have an opening 65 formed so that a part of the first boundary Bd1 is exposed. In this case, when the opening 65 is formed, a part of the outer peripheral surface 21c of the first housing component 21 and a part of the outer peripheral surface 22c of the second housing component 22 are exposed to the outside.

[0093] The soundproof cover 60 may have an opening 65 formed such that a part of the second boundary Bd2 is exposed. In this case, when the opening 65 is formed, a part of the outer peripheral surface 21c of the first housing structure 21 and the outer surface 23d of the third housing structure 23 are exposed to the outside. The number of openings 65 formed in the soundproof cover 60 may be appropriately changed. The number of openings 65 may be appropriately changed, for example, according to the number of contact points with other members mounted on the mounting object such as a vehicle.

[0094] ○ In the second embodiment, the soundproof cover 60 may have an opening 65 that does not expose any of the first boundary Bd1, the second boundary Bd2, and the third boundary Bd3. In this case, by preventing the opening 65 from communicating with the groove 100, even if the opening 65 is formed in the soundproof cover 60, it is difficult for water to enter the groove 100 from the opening 65. Therefore, it is difficult for the water that has entered from the opening 65 to stay at each of the boundaries Bd1, Bd2, and Bd3 of the adjacent housing structures.

[0095] In this modification example, the configuration for preventing the opening 65 from communicating with the groove 100 is a partition wall of the soundproof cover 60. When the soundproof cover 60 and the housing 20 are in close contact between the groove 100 and the opening 65, a part of the soundproof cover 60 located between the groove 100 and the opening 65 serves as a partition wall. Also, when there is a slight gap between the soundproof cover 60 and the housing 20 between the groove 100 and the opening 65, it is advisable to newly add a partition wall that protrudes from the soundproof cover 60 toward the housing 20. Thereby, it is difficult for the water that has entered from the opening 65 to reach the groove 100 due to the partition wall. That is, even if the opening 65 is formed in the soundproof cover 60, it is difficult for water to enter the groove 100. Therefore, even if the opening 65 is formed in the soundproof cover 60, it is difficult for water to accumulate between the soundproof cover 60 and the housing 20.

[0096] In the second embodiment, the blocking portions 66 may be provided midway along the groove portions 100, rather than at either end of the groove portions 100. In the above modified example, the blocking portions 66 may be provided at the locations where the openings 65 are formed, so that the groove portions 100 do not communicate with the openings 65.

[0097] In the third embodiment, the opening rib 202 does not have to be integrally formed with the two ribs 201. For example, the opening rib 202 may or may not be in contact with the two ribs 201. It is sufficient that the opening rib 202 is in contact with the third boundary Bd3.

[0098] In the third embodiment, the opening rib 202 does not have to be provided around the opening 65. For example, the opening rib 202 may be provided so as to close any position in the space Sp.

[0099] In the third embodiment, the opening 65 of the soundproof cover 60 may be omitted. In this case, the shape of the two ribs 201 may be modified so that they are annular around the entire circumference of the third boundary Bd3. Note that when the two ribs 201 are formed in an annular shape, the opening rib 202 may be omitted.

[0100] In the third embodiment, one of the two ribs 201 may be omitted. In this case, the one rib 201 may separate the third boundary Bd3 from the third opposing portion 90. However, the one rib 201 is in contact with the vicinity of the third boundary Bd3 to ensure that the third boundary Bd3 and the third opposing portion 90 are separated from each other.

[0101] ○ In the third embodiment, the groove portion 100 may be omitted from the first opposing portion 70, and the two ribs 201 may be integrally formed on the first opposing portion 70. Then, the first opposing portion 70 and the first boundary Bd1 may be separated by the two ribs 201 provided on the first opposing portion 70. When the opening 65 is formed so that the first boundary Bd1 is exposed to the outside, an opening rib 202 integrally formed on the first opposing portion 70 is added. And the opening rib 202 integrally formed on the first opposing portion 70 is brought into contact with the first boundary Bd1. In this modified example as well, similar to the above-described modified example, one of the two ribs 201 may be omitted.

[0102] ○ In the third embodiment, the groove portion 100 may be omitted from the second opposing portion 80, and the two ribs 201 may be integrally formed on the second opposing portion 80. Then, the second opposing portion 80 and the second boundary Bd2 may be separated by the two ribs 201 provided on the second opposing portion 80. When the opening 65 is formed so that the second boundary Bd2 is exposed to the outside, an opening rib 202 integrally formed on the second opposing portion 80 is added. And the opening rib 202 integrally formed on the second opposing portion 80 is brought into contact with the second boundary Bd2. In this modified example as well, similar to the above-described modified example, one of the two ribs 201 may be omitted.

[0103] ○ In the third embodiment, the rib 201 extends continuously along the third boundary Bd3, but is not limited thereto. For example, the rib 201 may be arranged intermittently along the third boundary Bd3. In this case, the interval between the adjacent ribs 201 along the third boundary Bd3 may be set such that the space Sp between the third opposing portion 90 and the third boundary Bd3 is provided continuously along the third boundary Bd3. Note that the rib 201 may be arranged intermittently along the third boundary Bd3, and the space Sp may also be arranged intermittently along the third boundary Bd3.

[0104] ○ In the third embodiment and the above-described modification example, the rib 201 may be provided on at least one of the opposing portions 70, 80, and 90. That is, it is sufficient if at least one of the first opposing portion 70 and the first boundary Bd1, the second opposing portion 80 and the second boundary Bd2, and the third opposing portion 90 and the third boundary Bd3 can be separated by the rib 201.

[0105] ○ In the third embodiment and the above-described modification example, the soundproof cover 60 may have an opening 65 that does not expose any of the first boundary Bd1, the second boundary Bd2, and the third boundary Bd3. Even in this case, an opening rib 202 is provided around the opening 65. Then, the opening rib 202 is connected to the rib 201. Thereby, even if the opening 65 is formed in the soundproof cover 60, the water absorbed by the opening rib 202 is guided to the rib 201. That is, the flow of water entering the opening 65 can be controlled by the opening rib 202. Therefore, it is difficult for the water that has entered from the opening 65 to reach the boundaries Bd1, Bd2, and Bd3. Therefore, it is less likely for the water absorbed by the opening rib 202, and thus the water absorbed by the soundproof cover 60, to stay at the boundaries Bd1, Bd2, and Bd3.

[0106] Note that in this modification example, the opening rib 202 does not have to be connected to the rib 201. The arrangement and shape of the opening rib 202 may be appropriately changed as long as it can control the flow of water entering the opening 65.

[0107] ○ In the third embodiment, the arrangement of the rib 201 may be changed as follows. As shown in FIG. 10, it may be changed such that two ribs 201 of the soundproof cover 60 are omitted, and two ribs 201 as a spacing holding part are provided on the housing 20. One of the two ribs 201 is integrally formed with the third housing component 23. The remaining one of the two ribs 201 is integrally formed with the fourth housing component 24. That is, the rib 201 is integrally formed with the adjacent housing components that form the third boundary Bd3. One of the two ribs 201 protrudes from the outer peripheral surface 23c of the third housing component 23 toward the third opposing part 90. The remaining one of the two ribs 201 protrudes from the first outer surface 24a of the fourth housing component 24 toward the third opposing part 90.

[0108] In this modification example, the two ribs 201 may be provided continuously along the third boundary Bd3, or may be arranged intermittently along the third boundary Bd3. And the space Sp may also be provided continuously along the third boundary Bd3, or may be provided intermittently along the third boundary Bd3.

[0109] By changing in this way, the rib 201 is made a part of the third housing component 23 and the fourth housing component 24. Therefore, when the housing 20 is covered with the soundproof cover 60, the soundproof cover 60 is pushed by the rib 201 formed on the third housing component 23 and the fourth housing component 24. For this reason, by covering the housing 20 with the soundproof cover 60, the third boundary Bd3 and the third opposing part 90 of the soundproof cover 60 can be separated. Thus, compared with the case where the spacing holding part is a separate configuration from the soundproof cover 60 or the housing 20, it becomes easier to simply hold the interval between the third boundary Bd3 and the third opposing part 90 of the soundproof cover 60.

[0110] In the above modified example, assuming that the housing 20 is provided with a rib 201, if an opening 65 is formed in the soundproof cover 60, the opening rib 202 may be arranged so as to contact the two ribs 201. That is, the opening rib 202 may be arranged so as to be integral with the two ribs 201. Note that one of the two ribs 201 in this modified example may be omitted. That is, it is sufficient that the rib 201 is integrally formed with at least one of the adjacent housing components that form the third boundary Bd3.

[0111] In the above modified example, the rib 201 integrally formed with the housing 20 may be integrally formed with at least one of the adjacent housing components that form the first boundary Bd1 or the second boundary Bd2. Note that the arrangement of the rib 201 integrally formed with the housing 20 may be changed as appropriate, as long as it can separate at least one of the first opposing portion 70 and the first boundary Bd1, the second opposing portion 80 and the second boundary Bd2, and the third opposing portion 90 and the third boundary Bd3.

[0112] In the third embodiment and the above-described modified examples, the rib 201 is used as the spacing portion, but the spacing portion may be a separate member from the soundproof cover 60 and the housing 20. There are no particular limitations on the shape and arrangement of the separate member as long as the spacing portion can separate at least one of the first opposing portion 70 and the first boundary Bd1, the second opposing portion 80 and the second boundary Bd2, and the third opposing portion 90 and the third boundary Bd3.

[0113] In each of the above embodiments, the sealing members 101, 102, 103 may be omitted. In this case, the first boundary Bd1 is formed at a position where the end 21e of the first housing component 21 and the end 22e of the second housing component 22 abut each other. The second boundary Bd2 is formed at a position where the end wall 23a of the third housing component 23 and the end wall 21a of the first housing component 21 abut each other. The third boundary Bd3 is formed at a position where the fourth housing component 24 and the end 23f of the third housing component 23 abut each other.

[0114] ○ In each of the above embodiments, the first housing structure 21 and the third housing structure 23 may be integrally formed. In this case, since the second boundary Bd2 is omitted, the groove portion 100 included in the second opposing portion 80 in the first and second embodiments is omitted. Further, in the above modification, the rib 201 that separates the second opposing portion 80 and the second boundary Bd2, and a separate member as a spacing holding portion are omitted.

[0115] ○ In each of the above embodiments, the compression portion 30 is not limited to a scroll type, and may be, for example, a piston type, a vane type, or the like. ○ In each of the above embodiments, the electric compressor 10 may be mounted on a fuel cell vehicle and compress air as a fluid supplied to the fuel cell by the compression portion 30.

Description of Reference Numerals

[0116] 10... Electric compressor, 20... Housing, 21... First housing structure as a housing structure, 22... Second housing structure as a housing structure, 23... Third housing structure as a housing structure and a first inverter chamber structure, 24... Fourth housing structure as a housing structure and a second inverter chamber structure, 30... Compression portion, 40... Electric motor, 50... Inverter, 60... Sound insulation cover, 65... Opening, 70... First opposing portion as an opposing portion, 80... Second opposing portion as an opposing portion, 90... Third opposing portion as an opposing portion, 100... Groove portion, 201... Rib as a spacing holding portion, 202... Opening rib, Bd1... First boundary as a boundary, Bd2... Second boundary as a boundary, Bd3... Third boundary as a boundary, m... Axis of the housing, A... Axial direction, S3... Inverter chamber.

Claims

1. A compression unit that compresses a fluid, An electric motor that drives the compression unit, An inverter that drives the electric motor, A housing that houses the compression unit, the electric motor, and the inverter, A soundproof cover that covers the housing, and is characterized in that: The housing is an electric compressor having a plurality of housing components, The soundproof cover has a facing portion facing the housing, The facing portion is provided with a groove portion that surrounds the boundary while being away from the boundary between adjacent housing components, An electric compressor, characterized in that the entire surface of the groove portion is separated from the boundary.

2. The electric compressor according to Claim 1, wherein the groove portion is continuously provided along the boundary.

3. A compression unit that compresses a fluid, An electric motor that drives the compression unit, An inverter that drives the electric motor, A housing that houses the compression unit, the electric motor, and the inverter, A soundproof cover that covers the housing, and is characterized in that: The housing is an electric compressor having a plurality of housing components, The soundproof cover has a facing portion facing the housing, The facing portion is provided with a groove portion that surrounds the boundary while being away from the boundary between adjacent housing components, The soundproof cover Has an opening formed so that a part of the housing is exposed to the outside, And a partition wall that partitions the groove portion and the opening, and is characterized in that.

4. The housing component includes at least a first inverter chamber component and a second inverter chamber component that partition an inverter chamber that houses the inverter, The electric compressor according to any one of Claims 1 to 3, wherein the boundary includes at least a boundary between the first inverter chamber component and the second inverter chamber component.

Images