Electric Compressor

Abstract

To provide an electric compressor capable of actively draining water reaching an integral hinge.SOLUTION: An electric compressor 10 includes a compression portion, an electric motor, a housing 20, and a noise insulation cover 70. The noise insulation cover 70 has an integral hinge 73 for connecting a first cover portion and a second cover portion. The integral hinge 73 forms a flowing water passage RW in a state of covering the housing 20 by the first cover portion and the second cover portion. The integral hinge 73 forms the flowing water passage RW extending in an extension direction of the integral hinge in a state of covering the housing 20 by the first cover portion and the second cover portion. The integral hinge 73 has: a through hole H73e as a draining portion for draining the water flowing in the flowing water passage RW to the outside of the integral hinge 73; and a bottom 73d of a long groove portion 73c as an inclination portion for guiding the water flowing in the flowing water passage RW to the through hole H73e.SELECTED DRAWING: Figure 5

Description

[Technical field]

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

[0002] The electric compressor includes a compression section, an electric motor, and a housing. The compression section compresses a fluid. The electric motor drives the compression section. The housing accommodates the compression section and the electric motor.

[0003] In order to reduce noise generated from the electric compressor, it is possible to cover the housing with a soundproof cover as described in Patent Document 1. The soundproof cover has two cover parts and an integral hinge that connects the two cover parts. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2021-170086 A Summary of the Invention [Problem to be solved by the invention]

[0005] When the housing of the electric compressor is covered with a soundproof cover, the integral hinge may be disposed vertically downward. In this case, if water enters the soundproof cover, the water travels down the housing before reaching the integral hinge. In other words, water is likely to accumulate in the integral hinge. If water accumulates in the integral hinge, there is a risk that corrosion of the housing located around the integral hinge will be accelerated. As a result, the durability of the electric compressor will deteriorate. [Means for solving the problem]

[0006] An electric compressor that solves the above problem includes a compression section that compresses a fluid, an electric motor that drives the compression section, a housing that accommodates the compression section and the electric motor, and a soundproof cover that covers the housing, wherein the soundproof cover has a first cover section and a second cover section, and an integral hinge that is integrally formed with the first cover section and the second cover section and connects the first cover section and the second cover section, wherein the integral hinge forms a flow passage extending in the extension direction of the integral hinge when the housing is covered by the first cover section and the second cover section, and has a drain section that drains water flowing in the flow passage to the outside of the integral hinge, and an inclined section that guides the water flowing in the flow passage to the drain section.

[0007] According to the above configuration, when the integral hinge is positioned vertically downward, water that has entered the soundproof cover flows through the housing and then reaches the integral hinge that forms the water flow passage. The water that has reached the integral hinge is guided by the inclined portion to the drainage section, and then drained from the drainage section to the outside of the integral hinge. This allows the water that has reached the integral hinge to be actively drained. As a result, a problem in which water accumulates in the integral hinge and promotes corrosion of the housing located around the integral hinge is avoided. As a result, the durability of the electric compressor can be improved.

[0008] In the above electric compressor, the drainage portion may be a through hole provided in the inclined portion. According to the above configuration, by forming the drainage portion as a through hole, water that has reached the integral hinge can be easily guided to the outside of the integral hinge.

[0009] In the above electric compressor, the integral hinge may have a first opening that opens the water flow passage toward the housing, and second openings located at both ends of the first opening that connect the water flow passage with the outside of the integral hinge, and the drainage section may be the second openings.

[0010] According to the above configuration, the first opening makes it easier to guide water from the housing side to the integral hinge that forms the water flow passage. Then, the water that reaches the integral hinge is guided to the second opening by the inclined portion, and then drained from the second opening to the outside of the integral hinge. Therefore, water that reaches the integral hinge can be drained without adding a new configuration to the integral hinge as a drainage portion. Therefore, active drainage can be achieved without increasing the number of steps for processing the soundproof cover.

[0011] In the above electric compressor, the integral hinge has a first opening that opens the water flow passage toward the housing, and second openings located at both ends of the first opening and connecting the water flow passage with the outside of the integral hinge, and the inclined portion is preferably formed by widening the opening of one of the second openings relative to the opening of the other of the second openings.

[0012] According to the above-mentioned configuration, the first opening makes it easier to guide water from the housing side to the integral hinge forming the water flow passage. Then, the water that reaches the integral hinge is guided to the drainage section by the inclined section, and then drained from the drainage section to the outside of the integral hinge.

[0013] The inclined portion is formed by widening the opening of one of the second openings relative to the opening of the other second opening. This allows the direction of water flow to be set to one direction. This makes it easier to control the flow of water that reaches the integral hinge. This makes it easier to control the drainage of water that reaches the integral hinge. Effect of the Invention

[0014] According to the present invention, the durability of the electric compressor can be improved. [Brief description of the drawings]

[0015] [Figure 1] 2 is a schematic diagram of the electric compressor showing a state before the housing is covered with a soundproof cover. FIG. [Diagram 2] 1 is a schematic diagram illustrating a first embodiment of an electric compressor with a housing covered with a soundproof cover. [Diagram 3] FIG. 2 is a schematic diagram showing a configuration of a soundproof cover. [Figure 4] 4 is a cross-sectional view taken along line 4-4 in FIG. 2. [Diagram 5] 5 is a cross-sectional view taken along line 5-5 in FIG. 4. [Figure 6] FIG. 11 is a cross-sectional view showing a configuration of an integral hinge in a second embodiment of the electric compressor. [Figure 7] FIG. 11 is a cross-sectional view showing a configuration of an integral hinge in a third embodiment of the electric compressor. [Figure 8] FIG. 11 is a perspective view of a soundproof cover in a fourth embodiment of the electric compressor. [Figure 9] FIG. 13 is a cross-sectional view showing a configuration of an integral hinge in a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] [First embodiment] A first embodiment of an electric compressor will now be described with reference to Figures 1 to 5. The electric compressor of this embodiment is used in, for example, a vehicle air conditioner.

[0017] <Configuration of electric compressor> As shown in Fig. 1 and Fig. 2, the electric compressor 10 includes a housing 20 and a soundproof cover 70. As shown in Fig. 1, the housing 20 is cylindrical. The housing 20 is made of metal. The housing 20 is made of aluminum, for example. The direction in which the axis m of the housing 20 extends is defined as an axial direction A. The direction perpendicular to the axis m of the housing 20 is defined as a radial direction B.

[0018] The electric compressor 10 includes a compression section 30 that compresses a refrigerant as a fluid, an electric motor 40 that drives the compression section 30, and an inverter 50 that drives the electric motor 40. The housing 20 accommodates the compression section 30, the electric motor 40, and the inverter 50. The compression section 30, the electric motor 40, and the inverter 50 are arranged in this order in the axial direction A of the housing 20. The electric motor 40 is driven by power supplied from the inverter 50. The compression section 30 is a scroll type composed of a fixed scroll and a movable scroll (not shown). The compression section 30 compresses the refrigerant sucked into the housing 20 as the electric motor 40 is driven.

[0019] <Housing configuration> The housing 20 has a first housing portion 21 and a second housing portion 22. The first housing portion 21 is cylindrical. The first housing portion 21 houses the compression portion 30 and the electric motor 40. The second housing portion 22 houses the inverter 50. The axis of the first housing portion 21 coincides with the axis m of the housing 20. The first housing portion 21 is continuous with the second housing portion 22 in the axial direction A. The axial direction A of the housing 20 indicates the direction in which the axis of the first housing portion 21 extends. The radial direction B of the housing 20 indicates the direction perpendicular to the axis of the first housing portion 21.

[0020] The housing 20 has a cylindrical suction wall 23 and a cylindrical discharge wall 24. The suction wall 23 is provided on the outer peripheral surface 21a of the first accommodating portion 21. The suction wall 23 protrudes from the outer peripheral surface 21a of the first accommodating portion 21. The suction wall 23 is disposed between the electric motor 40 and the inverter 50 in the axial direction A. The suction wall 23 is provided with a suction port Pin that communicates with the inside of the first accommodating portion 21. As the electric motor 40 is driven, the refrigerant compressed in the compression portion 30 is sucked into the inside of the first accommodating portion 21 from the suction port Pin.

[0021] The discharge wall portion 24 protrudes from the outer peripheral surface 21a of the first accommodating portion 21. The discharge wall portion 24 protrudes from the outer peripheral surface 21a in the same direction as the suction wall portion 23. The discharge wall portion 24 is disposed at the same position as the compression section 30 in the axial direction A. The discharge wall portion 24 is provided with a discharge port Pout that communicates with the interior of the first accommodating portion 21. The discharge port Pout communicates with the compression section 30. The refrigerant compressed in the compression section 30 is discharged from the discharge port Pout to the outside of the first accommodating portion 21.

[0022] <Soundproof cover configuration> 2 and 3, the soundproof cover 70 is made of an elastically deformable sound absorbing material. More specifically, the soundproof cover 70 has a two-layer structure in which a sound insulating material (not shown) is arranged on the outer periphery of the sound absorbing material. For example, the sound absorbing material is made of a urethane material, and the sound insulating material is made of a resin material that is harder than the sound absorbing material. The soundproof cover 70 has a first cover portion 71, a second cover portion 72, and an integral hinge 73.

[0023] The first cover part 71 and the second cover part 72 each have an accommodating recess 70a that conforms to the outer shape of the housing 20. The first cover part 71 has a first open end surface S1 that surrounds the accommodating recess 70a. The second cover part 72 has a second open end surface S2 that surrounds the accommodating recess 70a.

[0024] An insertion hole H72a is provided in the second cover portion 72. The suction wall portion 23 is inserted into the insertion hole H72a. The second cover portion 72 has an insertion portion 72a. The insertion portion 72a is a surface that forms the insertion hole H72a.

[0025] The soundproof cover 70 is provided with an insertion hole H70b. The discharge wall portion 24 is inserted into the insertion hole H70b. The soundproof cover 70 has a discharge wall portion insertion portion 70b. The discharge wall portion insertion portion 70b is a surface that forms the insertion hole H70b. The discharge wall portion insertion portion 70b is formed by a U-shaped first forming surface 71a formed on the first cover portion 71 and a U-shaped second forming surface 72b formed on the second cover portion 72.

[0026] The above-mentioned positions of the suction wall portion 23 and the discharge wall portion 24 are merely examples and may take various forms. Therefore, the positions of the insertion hole H72a through which the suction wall portion 23 is inserted and the insertion hole H70b through which the discharge wall portion 24 is inserted are also appropriately changed in accordance with the positions of the suction wall portion 23 and the discharge wall portion 24.

[0027] The integral hinge 73 is integrally formed with the first cover portion 71 and the second cover portion 72. The integral hinge 73 connects the first cover portion 71 and the second cover portion 72 together.

[0028] <First cover part and second cover part separated> Hereinafter, the configuration of the soundproof cover 70 will be described on the assumption that the first cover portion 71 and the second cover portion 72 are separated in the radial direction B.

[0029] As shown in FIG. 3, the integral hinge 73 is flat. The integral hinge 73 has a first surface 73a and a second surface 73b. The first surface 73a and the second surface 73b are flat surfaces located in the thickness direction of the integral hinge 73. The first surface 73a faces the same direction as the first opening end surface S1 and the second opening end surface S2. In this embodiment, the direction perpendicular to both the axial direction A and the thickness direction of the integral hinge 73 is defined as the width direction of the integral hinge 73. In the width direction of the integral hinge 73, the widths of the first surface 73a and the second surface 73b are constant.

[0030] The first cover portion 71 has a first cutout portion 71b. The first cutout portion 71b is provided so as to cut out a part of the first cover portion 71 including the first opening end surface S1. The second cover portion 72 has a second cutout portion 72c. The second cutout portion 72c is provided so as to cut out a part of the second cover portion 72 including the second opening end surface S2. The first cutout portion 71b and the second cutout portion 72c are provided at positions corresponding to the integral hinge 73. In the thickness direction of the integral hinge 73, the positions of the bottoms of the first cutout portion 71b and the second cutout portion 72c are the same as the first surface 73a of the integral hinge 73.

[0031] The integral hinge 73 has a long groove portion 73c and a through hole H73e. The long groove portion 73c is provided in the first surface 73a. The long groove portion 73c is disposed in the center of the first surface 73a in the width direction of the integral hinge 73. The long groove portion 73c extends over the entire length of the first surface 73a in the axial direction A. The long groove portion 73c is a surface that forms a groove having a depth in the thickness direction of the integral hinge 73.

[0032] The long groove portion 73c of the present embodiment has a bottom 73d. The bottom 73d of the long groove portion 73c is linear. The bottom 73d extends such that the depth of the bottom 73d gradually increases from the first end T1 toward the second end T2 of the integral hinge 73. The bottom 73d is disposed at the center of the integral hinge 73 in the width direction of the integral hinge 73.

[0033] The through hole H73e penetrates the integral hinge 73 in the thickness direction thereof. The through hole H73e is provided in the bottom 73d of the long groove portion 73c. ​​The through hole H73e is provided in the vicinity of the second end T2 of the integral hinge 73.

[0034] <State in which the housing is covered with the first cover part and the second cover part> The configuration of the soundproof cover 70 will be described below, assuming that the housing 20 is covered with the first cover portion 71 and the second cover portion 72.

[0035] As shown in FIG. 2, the first opening end surface S1 of the first cover portion 71 and the second opening end surface S2 of the second cover portion 72 are butted against each other in the radial direction B. As shown in FIG. 2 and FIG. 4, the integral hinge 73 is bent so as to protrude outward from the soundproof cover 70 when the first opening end face S1 and the second opening end face S2 are butted against each other. The integral hinge 73 is bent in the width direction with the bottom 73d of the long groove portion 73c as a reference. The first surface 73a of the integral hinge 73 is curved so that parts of the surfaces face each other without contacting each other. The second surface 73b of the integral hinge 73 is curved so that parts of the surfaces face opposite each other. The integral hinge 73 returns to a flat plate shape when the first cover portion 71 and the second cover portion 72 are separated. Therefore, the integral hinge 73 is elastically deformable in response to the contact and separation of the first cover portion 71 and the second cover portion 72.

[0036] The integral hinge 73 is located on the opposite side to the discharge wall portion insertion portion 70b. The integral hinge 73 protrudes in the direction opposite to the direction in which the suction wall portion 23 and the discharge wall portion 24 protrude.

[0037] As shown in Fig. 2 and Fig. 4, the first cutout portion 71b and the second cutout portion 72c are located on the opposite side to the discharge wall portion insertion portion 70b. The soundproof cover 70 has a communication hole H70c defined by the first cutout portion 71b and the second cutout portion 72c. The communication hole H70c communicates with the interiors of the first cover portion 71 and the second cover portion 72. The soundproof cover 70 has a communication portion 70c which is a surface defining the communication hole H70c. The communication portion 70c is defined by the first cutout portion 71b and the second cutout portion 72c.

[0038] The integral hinge 73 forms a flowing water passage RW. The flowing water passage RW is a space formed by parts of the first surfaces 73a of the integral hinges 73 facing each other without touching each other. The flowing water passage RW extends in the extension direction of the integral hinge 73. The extension direction of the integral hinge 73 is the direction in which the boundary between the first cover part 71 and the second cover part 72 extends when the first opening end face S1 and the second opening end face S2 are butted against each other.

[0039] The integral hinge 73 forms a water flow passage RW that extends in the extending direction of the integral hinge 73 in a state in which the first cover portion 71 and the second cover portion 72 cover the housing 20.

[0040] The integral hinge 73 has a first opening 81. The first opening 81 is formed by a portion of the first surface 73a that faces without contacting each other. The first opening 81 opens toward the housing 20. The first opening 81 communicates with the flow passage RW. The first opening 81 communicates with the communication portion 70c. The integral hinge 73 has the first opening 81 that opens the flow passage RW toward the housing 20.

[0041] 5, the integral hinge 73 has a second opening 82. The second opening 82 is located on both ends of the first opening 81 in the extension direction of the integral hinge 73. The second opening 82 communicates the water flow passage RW with the outside of the integral hinge 73.

[0042] The second opening 82 is formed at the first end T1 and the second end T2 of the integral hinge 73. The opening 82a of one of the second openings 82 is formed by a curved edge located at the second end T2 of the first surface 73a and an edge of the long groove portion 73c located at the second end T2. The opening 82b of the other of the second openings 82 is formed by a curved edge located at the first end T1 of the first surface 73a and an edge of the long groove portion 73c located at the first end T1. The opening 82a of one of the second openings 82 is wider than the opening 82b of the other of the second openings 82. Therefore, the bottom 73d of the long groove portion 73c is formed by widening the opening 82a of one of the second openings 82 relative to the opening 82b of the other of the second openings 82. The integral hinge 73 has second openings 82 located at both ends of the first opening 81 and communicating the flow passage RW with the outside of the integral hinge 73.

[0043] As shown in FIG. 4 and FIG. 5, the bottom 73d of the long groove portion 73c formed in the integral hinge 73 faces the housing 20 via the first opening 81 and the communication portion 70c. The bottom 73d of the long groove portion 73c extends so as to gradually move away from the housing 20 in the radial direction B from the first end T1 toward the second end T2. The bottom 73d of the long groove portion 73c is inclined with respect to the axial direction A. The bottom 73d is an inclined portion that guides water flowing through the water flow passage RW to the through hole H73e after water has entered the soundproof cover 70. The through hole H73e is a drainage portion that discharges the water flowing through the water flow passage RW to the outside of the integral hinge 73. The bottom 73d may be an inclined surface.

[0044] The portion of the bottom 73d of the long groove portion 73c that is located at the second end T2 of the integral hinge 73 is the end of the inclined portion that is farthest from the housing 20 in the radial direction B. Therefore, the through hole H73e is provided in the vicinity of the end of the inclined portion.

[0045] [Operation of this embodiment] The operation of this embodiment will now 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 70, the noise of the electric compressor 10 is reduced.

[0046] 4 and 5, for example, when the integral hinge 73 is positioned below in the vertical direction Vd, water that has entered the soundproof cover 70 flows along the housing 20 and then reaches the integral hinge 73 that forms the flowing water passage RW. The first opening 81 makes it easier to guide water from the housing 20 side to the integral hinge 73 that forms the flowing water passage RW. The water that has entered the flowing water passage RW is guided to the through hole H73e by the bottom 73d of the long groove portion 73c, and then drained from the through hole H73e to the outside of the integral hinge 73.

[0047] [Effects of this embodiment] The effects of this embodiment will be described. (1-1) The bottom 73d of the long groove portion 73c and the through hole H73e can actively drain water that has reached the integral hinge 73. As a result, it is possible to avoid a problem in which water accumulates in the integral hinge 73, accelerating corrosion of the housing 20 located around the integral hinge 73. As a result, it is possible to improve the durability of the electric compressor 10.

[0048] (1-2) By forming the drainage portion as the through hole H73e, water that reaches the integral hinge 73 can be easily guided to the outside of the integral hinge 73. (1-3) The bottom 73d of the long groove portion 73c is formed by widening the opening 82a of one of the second openings 82 relative to the opening 82b of the other second opening 82. This allows the direction in which water flows to be determined in one direction. This makes it easier to control the flow of water that reaches the integral hinge 73. This makes it easier to control the drainage of water that reaches the integral hinge 73.

[0049] (1-4) Bottom 73d of long groove 73c has a certain inclination, which makes it possible to promote drainage of water that has reached integral hinge 73 while allowing bottom 73d of long groove 73c to have a simple structure.

[0050] [Second embodiment] A second embodiment of the electric compressor will be described below with reference to Fig. 6. The main difference between the first embodiment and the second embodiment is that the configuration of the long groove portion 73c and the arrangement of the through holes H73e are changed. This 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.

[0051] <Structure of the bottom of the long groove and arrangement of the through holes> As shown in FIG. 6, the center of the bottom 73d of the long groove portion 73c in the axial direction A is defined as a central portion 73f. The bottom 73d has a first inclined portion 73g and a second inclined portion 73h. The first inclined portion 73g extends so as to gradually move away from the housing 20 in the radial direction B from the first end T1 toward the central portion 73f. The first inclined portion 73g is linear. The first inclined portion 73g is inclined with respect to the axial direction A. The second inclined portion 73h extends so as to gradually move away from the housing 20 in the radial direction B from the second end T2 toward the central portion 73f. The second inclined portion 73h is linear. The second inclined portion 73h is inclined with respect to the axial direction A. That is, the bottom 73d extends so as to gradually move away from the housing 20 in the radial direction B. The through hole H73e is provided in the central portion 73f of the bottom 73d. The first inclined portion 73g and the second inclined portion 73h may be inclined surfaces.

[0052] [Actions and Effects of the Present Embodiment] According to the present embodiment, the same functions as those of the first embodiment are achieved, and the same effects as those of (1-1), (1-2), and (1-4) of the first embodiment are achieved.

[0053] [Third embodiment] Hereinafter, a third embodiment of an electric compressor will be described with reference to Fig. 7. The main difference between the third embodiment and the first embodiment is that the configuration of the long groove portion 73c and the number and arrangement of the through holes H73e are changed. This point will be described in detail, and the same components as those in the first embodiment will be denoted by the same reference numerals and detailed description will be omitted.

[0054] <Structure of the bottom of the long groove, and the number and arrangement of the through holes> As shown in FIG. 7, the center of the bottom 73d of the long groove portion 73c in the axial direction A is defined as a central portion 73f. The bottom 73d has a first inclined portion 73i and a second inclined portion 73j. The first inclined portion 73g extends from the central portion 73f toward the first end T1 so as to gradually move away from the housing 20 in the radial direction B. The first inclined portion 73i is linear. The first inclined portion 73i is inclined with respect to the axial direction A. The second inclined portion 73j extends from the central portion 73f toward the second end T2 so as to gradually move away from the housing 20 in the radial direction B. The second inclined portion 73j is linear. The second inclined portion 73j is inclined with respect to the axial direction A. That is, the bottom 73d extends so as to gradually move away from the housing 20 in the radial direction B.

[0055] In this embodiment, two through holes H73e are employed. One through hole H73e is provided in the first inclined portion 73i. One through hole H73e is provided in the vicinity of the first end T1. The remaining through hole H73e is provided in the second inclined portion 73j. The remaining through hole H73e is provided in the vicinity of the second end T2.

[0056] The portions of the bottom 73d of the long groove portion 73c located at the first end T1 and the second end T2 are the ends of the inclined portion farthest from the housing 20 in the radial direction B. Therefore, the two through holes H73e are provided near the ends of the inclined portion. The first inclined portion 73i and the second inclined portion 73j may be inclined surfaces.

[0057] [Actions and Effects of the Present Embodiment] According to the present embodiment, the same functions as those of the first embodiment are achieved, and the same effects as those of (1-1), (1-2), and (1-4) of the first embodiment are achieved.

[0058] [Fourth embodiment] Hereinafter, a fourth embodiment of an electric compressor will be described with reference to Fig. 8 and Fig. 9. The main difference between the first embodiment and the fourth embodiment is that the configuration of the integral hinge is 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 detailed description will be omitted.

[0059] <First cover part and second cover part separated> Hereinafter, on the assumption that the first cover portion 71 and the second cover portion 72 are separated in the radial direction B, the configuration of the integral hinge 73 will be described.

[0060] As shown in Fig. 8, unlike the first embodiment, the integral hinge 73 does not include the long groove portion 73c. ​​In the width direction of the integral hinge 73, the width of the first surface 73a and the second surface 73b increases from the first end T1 toward the second end T2. In the width direction of the integral hinge 73, a virtual line extending in the axial direction A through the center of the first surface 73a is defined as a folding line VL. The through hole H73e is disposed on the folding line VL. The through hole H73e is provided in the vicinity of the second end T2.

[0061] <State in which the housing is covered with the first cover part and the second cover part> The configuration of the integral hinge 73 will be described below, assuming that the housing 20 is covered with the first cover portion 71 and the second cover portion 72.

[0062] 8 and 9, the integral hinge 73 is folded in its width direction with respect to a folding line VL. The position of the folding line VL on the first surface 73a is defined as a bottom 73k.

[0063] 9, the bottom 73k of the integral hinge 73 extends so as to gradually move away from the housing 20 in the radial direction B from the first end T1 toward the second end T2. The bottom 73k extends from the first end T1 toward the second end T2 at a constant inclination with respect to the axial direction A. The bottom 73k of the integral hinge 73 is inclined with respect to the axial direction A.

[0064] The opening 82a of one of the second openings 82 is formed by a curved edge located at the second end T2 of the first surface 73a. The opening 82b of the other of the second openings 82 is formed by a curved edge located at the first end T1 of the first surface 73a. The opening 82a of one of the second openings 82 is wider than the opening 82b of the other of the second openings 82. Therefore, the bottom 73k of the integral hinge 73 is formed by widening the opening 82a of one of the second openings 82 relative to the opening 82b of the other of the second openings 82.

[0065] The bottom 73k of the integral hinge 73 faces the housing 20 via the first opening 81 and the communication portion 70c. The bottom 73k of the integral hinge 73 extends so as to gradually move away from the housing 20 in the radial direction B from the first end T1 toward the second end T2. The bottom 73k of the integral hinge 73 is inclined with respect to the axial direction A. The bottom 73k is an inclined portion that guides water flowing through the water flow passage RW to the through hole H73e after water has entered the soundproof cover 70. The bottom 73k may be an inclined surface.

[0066] The portion of the bottom 73k of the integral hinge 73 that is located at the second end T2 of the integral hinge 73 is the end of the inclined portion that is farthest from the housing 20 in the radial direction B. Therefore, the through hole H73e is provided in the vicinity of the end of the opposing portion.

[0067] [Operation of this embodiment] The operation of this embodiment will now be described. 9, for example, when the integral hinge 73 is positioned below the vertical direction Vd, water that has entered the soundproof cover 70 reaches the integral hinge 73 that forms the flowing water passage RW after flowing through the housing 20. The water that has entered the flowing water passage RW is guided by the bottom 73k of the integral hinge 73 to the through hole H73e, and then drained from the through hole H73e to the outside of the integral hinge 73.

[0068] [Effects of this embodiment] The effects of this embodiment will be described. (4-1) The bottom 73k of the integral hinge 73 and the through hole H73e can actively drain water that has reached the integral hinge 73.

[0069] (4-2) The bottom 73k of the integral hinge 73 has a certain inclination. Therefore, the bottom 73k of the integral hinge 73 can be simply configured, and the drainage of water that has reached the integral hinge 73 can be promoted.

[0070] (4-3) By forming the drainage portion as the through hole H73e, water that reaches the integral hinge 73 can be easily guided to the outside of the integral hinge 73. (4-4) In each of the above embodiments, it was necessary to form bottom 73d as an inclined portion by changing the depth of the groove formed by long groove portion 73c in axial direction A. However, in this embodiment, bottom 73k as an inclined portion can be formed by changing the width of integral hinge 73. That is, processing of integral hinge 73 is simplified.

[0071] [Example of change] The above-described embodiments can be modified as follows: The above-described embodiments and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0072] In the first and fourth embodiments, a cutout portion formed by cutting out a part of the first end T1 may be used as a drainage portion instead of the through hole H73e. In the third embodiment, instead of the through hole H73e, a cutout portion formed by cutting out a part of each of the first end T1 and the second end T2 may be used as a drainage portion.

[0073] In the first and fourth embodiments, the through hole H73e may be omitted. In such a modification, water flowing through the bottom 73d of the long groove portion 73c or the bottom 73k of the integral hinge 73 is drained from the second opening 82 located at the second end T2 of the integral hinge 73. In other words, the second opening 82 located at the second end T2 may serve as a drainage portion.

[0074] Furthermore, in the third embodiment, the through hole H73e may be omitted. In such a modification, the water flowing through the bottom 73d of the long groove portion 73c is drained to the outside of the integral hinge 73 from the second opening 82 located at the first end T1 and the second end T2 of the integral hinge 73. That is, the second opening 82 located at each of the first end T1 and the second end T2 may serve as a drainage portion.

[0075] By making the above-mentioned changes, water that has reached integral hinge 73 can be drained without adding a new configuration as a drainage section to integral hinge 73. Therefore, active drainage can be achieved without increasing the number of steps for processing soundproof cover 70.

[0076] In the first embodiment, the bottom 73d of the long groove portion 73c may extend linearly so as to gradually move away from the housing 20 in the radial direction B from the second end T2 toward the first end T1. In such a modification, the through hole H73e may be provided near the first end T1 of the integral hinge 73. The part of the bottom 73d of the long groove portion 73c located at the first end T1 of the integral hinge 73 is the end of the inclined portion farthest from the housing 20 in the radial direction B. Therefore, the through hole H73e may be provided near the end of the inclined portion. Note that in this modification, the through hole H73e may be omitted. In this case, the second opening 82 located at the first end T1 serves as a drainage portion.

[0077] In the first embodiment and the above modified examples, the bottom 73d of the long groove portion 73c may be curved. Also, the bottom 73d may be a curved surface. In the second and third embodiments, the first inclined portions 73g, 73i may be curved. The first inclined portions 73g, 73i may be a curved surface. The second inclined portions 73h, 73j may be curved. The second inclined portions 73h, 73j may be a curved surface. That is, in this modified example, the bottom 73d as the inclined portion may be gradually separated from the housing 20 in the radial direction B.

[0078] In the first embodiment, the long groove portion 73c may be omitted. In such a modification, for example, the thickness of the integral hinge 73 may be gradually thinner from the first end T1 toward the second end T2. When the integral hinge 73 is bent, the portion of the first surface 73a facing the housing 20 extends away from the housing 20 from the first end T1 toward the second end T2. Therefore, the portion of the first surface 73a facing the housing 20 may be an inclined portion. The thickness of the integral hinge 73 may be gradually thinner from the second end T2 toward the first end T1.

[0079] In the second embodiment, the long groove portion 73c may be omitted. In such a modification, for example, the thickness of the integral hinge 73 may be gradually thinner from the first end T1 toward the central portion 73f. Similarly, the thickness of the integral hinge 73 may be gradually thinner from the second end T2 toward the central portion 73f.

[0080] In the third embodiment, the long groove portion 73c may be omitted. In such a modification, for example, the thickness of the integral hinge 73 may be gradually thinner from the central portion 73f toward the first end T1. Similarly, the thickness of the integral hinge 73 may be gradually thinner from the central portion 73f toward the second end T2.

[0081] In the fourth embodiment, the width of the first surface 73a and the second surface 73b in the width direction of the integral hinge 73 may be increased from the second end T2 to the first end T1. When modified in this manner, the bottom 73k of the integral hinge 73 extends so as to gradually move away from the housing 20 in the radial direction B from the second end T2 to the first end T1. The bottom 73k extends from the second end T2 to the first end T1 at a constant inclination with respect to the axial direction A. The bottom 73k of the integral hinge 73 is inclined with respect to the axial direction A.

[0082] The portion of the bottom 73k of the integral hinge 73 that is located at the first end T1 of the integral hinge 73 is the end of the inclined portion that is farthest from the housing 20 in the radial direction B. That is, the through hole H73e may be provided in the vicinity of the first end T1. Note that in this modified example, the through hole H73e may be omitted. In such a modification, water flowing through the bottom 73k of the integral hinge 73 is drained from the second opening 82 located at the first end T1 of the integral hinge 73. That is, the second opening 82 located at the first end T1 may be used as a drainage portion.

[0083] In the fourth embodiment, the thickness of the integral hinge 73 may be gradually reduced from the first end T1 to the second end T2. By making such a change, the bottom 73k of the integral hinge 73 can be inclined more with respect to the axial direction A.

[0084] In the above-described embodiments and modifications, the number of integral hinges 73 is not limited to one, and two or more integral hinges 73 may be used. When a plurality of integral hinges 73 are used, any of the integral hinges 73 described in the above-described embodiments and modifications may be used.

[0085] In each of the above embodiments, it is assumed that the first cover portion 71 and the second cover portion 72 are separated in the radial direction B. In the thickness direction of the integral hinge 73, the positions of the bottoms of the first cutout portion 71b and the second cutout portion 72c may be shifted from the position of the first surface 73a of the integral hinge 73. However, it is preferable that the positions are shifted so that the first opening 81 and the water flow passage RW are formed when the housing 20 is covered by the first cover portion 71 and the second cover portion 72.

[0086] In each of the above embodiments, the first cutout portion 71b of the first cover portion 71 and the second cutout portion 72c of the second cover portion 72 may be omitted to omit the communication portion 70c. In this case, the first opening 81 is provided at a position facing the boundary between the first opening end face S1 and the second opening end face S2. The boundary between the first opening end face S1 and the second opening end face S2 is not strictly sealed, and a small gap is formed. For this reason, it can be said that the first opening 81 opens toward the housing 20 through the boundary between the first opening end face S1 and the second opening end face S2. Therefore, even if the communication portion 70c is omitted, it can be said that the first opening 81 opens the flow passage RW toward the housing 20.

[0087] In each of the above-described embodiments, the soundproof cover 70 is not limited to a two-layer structure of a sound absorbing material and a sound insulating material, but may be a single layer structure of a sound absorbing material alone, or a three-layer structure or more. In each of the above-described embodiments, the compression section 30 is not limited to a scroll type and may be, for example, a piston type or a vane type.

[0088] In each of the above-described embodiments, the electric compressor 10 may be mounted on a fuel cell vehicle, and the compression unit 30 may compress air as a fluid to be supplied to the fuel cell. [Explanation of symbols]

[0089] 10...electric compressor, 20...housing, 30...compression section, 40...electric motor, 70...soundproof cover, 71...first cover section, 72...second cover section, 73...integral hinge, 73d, 73k...bottom as inclined section, H73e...through hole as drainage section, RW...flow passage, 81...first opening, 82...second opening, 82a...opening of one second opening, 82b...opening of the other second opening, m...axis.

Claims

1. A compression section that compresses the fluid; an electric motor that drives the compression unit; a housing that accommodates the compression unit and the electric motor; A soundproof cover that covers the housing, The soundproof cover is A first cover portion and a second cover portion; an integral hinge that is integrally formed with the first cover portion and the second cover portion and connects the first cover portion and the second cover portion, The integral hinge comprises: a water passage extending in an extending direction of the integral hinge is formed in a state in which the housing is covered with the first cover portion and the second cover portion; a drainage portion that drains water flowing through the water flow passage to the outside of the integral hinge; and an inclined portion that guides water flowing through the water flow passage to the drain portion.

2. The electric compressor according to claim 1 , wherein the drainage portion is a through hole provided in the inclined portion.

3. The integral hinge comprises: a first opening portion that opens the water flow passage toward the housing; a second opening located at both ends of the first opening and communicating the water flow passage with the outside of the integral hinge; The electric compressor according to claim 1 , wherein the drainage portion is the second opening portion.

4. The integral hinge comprises: a first opening portion that opens the water flow passage toward the housing; a second opening located at both ends of the first opening and communicating the water flow passage with the outside of the integral hinge; The electric compressor according to any one of claims 1 to 3, wherein the inclined portion is formed by widening an opening of one of the second openings relative to an opening of the other of the second openings.

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