JPWO2013172189A1 - Electric compressor - Google Patents

Abstract

The housing includes a compression mechanism 3 and an electric motor 4 that drives the compression mechanism 3, and the electric motor 4 includes a stator 21 that is formed by winding a coil around a stator core 24 fixed in the housing 2. And a rotor 22 fixed to the drive shaft 10 and rotatably disposed inside the stator 21. The fluid to be compressed is guided to the compression mechanism 3 through the motor housing space 12 a in which the motor 4 is housed. In the configuration, a fluid introduction passage 31 extending along the axial direction of the drive shaft 10 is formed between the housing 2 and the stator core 24, and the suction port 30 for introducing the fluid to be compressed is used as the stator core 24 of the housing 2. It is provided at a location facing the outer peripheral surface of the fluid and is connected to the fluid introduction passage 31. [Selection] Figure 1

Description

  The present invention relates to an electric compressor that includes a compression mechanism and an electric motor that drives the compression mechanism in a housing, and guides a fluid to be compressed to the compression mechanism through an electric motor housing space in which the electric motor is accommodated.

As an electric compressor provided with a compression mechanism and an electric motor for driving the compression mechanism in the housing, for example, those shown in the following Patent Documents 1 to 3 are known.
Among these, Patent Document 1 (Japanese Patent Laid-Open No. 2000-291557) and Patent Document 2 (Japanese Patent Laid-Open No. 2005-291004) disclose an electric compressor for refrigerant compression in which a compression mechanism and an electric motor are integrated. The housing is connected to the discharge housing, the intermediate housing, and the suction housing in the axial direction by bolts, a partition wall is provided in the suction housing, and a suction port is formed on a side surface closer to the intermediate housing than the partition wall. A space sealed by a lid member is formed outside the partition wall, a drive circuit in which the control circuit and the inverter are integrated is accommodated in this space, and the drive circuit is provided in the vicinity of the suction port. The structure which cools the switching element which comprises the inverter with refrigerant gas is disclosed.

  Patent Document 3 (Japanese Patent Application Laid-Open No. 2008-184959) discloses an electric compressor having a compression mechanism (compression unit) and an electric motor that drives the compression mechanism in the housing, and between the housing and the stator core. A plurality of refrigerant flow paths in which the refrigerant flows in the axial direction are arranged side by side in the rotation direction, and one of the plurality of refrigerant flow paths is arranged to face the drive circuit through the housing. The other refrigerant flow path is closed by a restraining member disposed between one end side in the axial direction of the housing and the stator core, so that the refrigerant sucked from the refrigerant suction port does not flow to the other refrigerant flow path, and the housing A configuration is disclosed in which the drive circuit is sufficiently cooled while ensuring the pressure resistance strength of the housing by reducing the bias in the stress distribution in the rotational direction between the stator and the stator core.

JP 2000-291557 A JP 2005-291004 A JP 2008-184959 A

However, in the configurations of Patent Documents 1 and 2, since the suction port is arranged on the outer peripheral wall between the motor and the drive circuit in the vicinity of the drive circuit in order to cool the drive circuit with the suction refrigerant, The electric compressor has a disadvantage that it is not possible to meet the demand for miniaturization because the length in the axial direction is long because it is necessary to secure the allowance for forming the suction port between the electric motor and the drive circuit. Further, in order to cool the drive circuit, the suction port must be arranged as close as possible to the drive circuit, and the formation position of the suction port, the layout of the refrigerant path, and the like are limited.
The present invention has been made in view of such circumstances, and an electric compressor capable of reducing the size by reducing the axial dimension and increasing the degree of freedom of the intake port formation position and the refrigerant path layout is provided. The main challenge is to provide it. Another object of the present invention is to sufficiently cool the drive circuit without providing the suction port in the vicinity of the drive circuit.

  In order to achieve the above object, an electric compressor according to the present invention includes a compression mechanism and an electric motor for driving the compression mechanism in a housing, and the electric motor is coiled on a stator core fixed in the housing. And a rotor that is fixedly mounted on a drive shaft and rotatably disposed inside the stator. In the configuration leading to the compression mechanism through the space, a suction port for introducing the fluid to be compressed is formed by forming a fluid introduction passage extending along the axial direction of the drive shaft between the housing and the stator core. The housing is provided at a location facing the outer peripheral surface of the stator core and connected to the fluid introduction passage.

  Therefore, according to the configuration as described above, a fluid introduction passage extending along the axial direction of the drive shaft is formed between the housing and the stator core, and the suction port for introducing the fluid to be compressed is provided in the stator core. Since it is connected to the fluid introduction passage at the location facing the outer peripheral surface, it is not necessary to secure the allowance for forming the suction port between the drive circuit and the motor, and the axial dimension of the housing is shortened to reduce the size of the electric compressor. It is possible to reduce the size.

  In addition, since it is possible to form the suction port at any position in the axial direction as long as it faces the outer peripheral surface of the stator core, the flexibility of the suction port formation position and the layout of the refrigerant path can be increased. It becomes possible to raise.

Further, in the configuration described above, the flow of the fluid to be compressed that flows in the fluid introduction passage from the suction port toward the compression mechanism is suppressed between the suction port and the compression mechanism in the axial direction of the drive shaft. It is advisable to provide a restraining mechanism.
In such a configuration, the fluid to be compressed that has flowed from the suction port once flows to the side opposite to the compression mechanism, and then can flow to the compression mechanism side through the gap between the stator coils and the gap between the stator and the rotor. The cooling of the coil can be promoted.

As an aspect of such a suppression mechanism,
(i) The compression mechanism side opening end of the fluid introduction passage is restricted or closed by a part of the housing,
(ii) A portion that narrows or closes the cross section of the passage closer to the compression mechanism than the suction port of the fluid introduction passage,
(iii) On the side of the compression mechanism with respect to the fluid introduction passage, one that restricts or closes the downstream side of the fluid introduction passage by a bobbin provided at the coil end is conceivable.

In addition, a gap extending along the axial direction of the drive shaft is formed between the housing and the stator core at a position different from the fluid introduction passage, and a fluid to be compressed is partially formed in the gap. You may make it provide the suppression mechanism which suppresses the flow of this.
In such a configuration, the gap extending along the axial direction of the drive shaft is formed between the housing and the stator core at a position different from the fluid introduction passage in the circumferential direction of the stator core. When assembled by press-fitting into the housing, it is possible to alleviate the uneven distribution of stress generated in the housing (stress concentration at a specific location of the housing). In addition, a suppression mechanism that suppresses the flow of the fluid to be compressed is provided in the gap, so that the flow of the fluid to be compressed through the gap is suppressed, and the sucked fluid to be sucked is passed between the coils or between the rotor and the stator. It is possible to actively circulate in the gap between the rotor and the stator, and it is possible to promote cooling of the rotor and the stator.

  Here, in the case where an inverter housing space that houses an inverter board that drives and controls the electric motor is integrally provided in the electric compressor, the inverter housing space is formed in an axial direction opposite to the side of the housing on which the compression mechanism is provided. It is good to provide in an edge part or along the outer peripheral wall of the said housing.

  In the former configuration, the fluid to be compressed flowing from the suction port also flows to the axial end opposite to the side where the compression mechanism is provided via the fluid introduction passage, so that the inverter is connected to the shaft opposite to the compression mechanism. Even when it is provided at the direction end, the inverter can be efficiently cooled. In particular, if a configuration is provided in which the suppression mechanism that suppresses the flow of the compressed fluid that flows from the suction port toward the compression mechanism in the fluid introduction passage is employed, most or all of the compressed fluid that flows in from the suction port is compressed by the compression mechanism. Thus, the cooling of the inverter board can be further promoted.

  In the latter configuration, the fluid to be compressed flowing from the suction port flows or fills the fluid introduction passage and the gap in the axial direction along the outer peripheral wall of the housing. Even if it is provided, the inverter can be efficiently cooled. In particular, if the inverter accommodating space is provided along the fluid introduction passage on the radially outer side of the fluid introduction passage, the inverter can be cooled by the refrigerant immediately after flowing into the fluid introduction passage from the suction port.

  The passage cross-sectional area of the fluid introduction passage may be larger than the passage cross-sectional area of the gap. In order to alleviate the uneven distribution of stress generated in the housing when the stator core is assembled, the gap may be a slight gap, but the fluid introduction passage constitutes the inflow path of the fluid to be compressed. By securing a large value, it becomes possible to avoid an increase in passage resistance. Further, by reducing the passage cross section of the gap (by reducing the gap), the compressor can be downsized.

As described above, according to the present invention, the fluid introduction passage extending along the axial direction of the drive shaft is formed between the housing and the stator core, and the suction port for introducing the fluid to be compressed is provided in the housing. Since it is provided at a location facing the outer peripheral surface of the stator core and connected to the fluid introduction passage, the axial dimension of the housing can be shortened, and the electric compressor can be miniaturized.
Further, by providing a configuration for providing a suppression mechanism for suppressing the flow of the fluid to be compressed flowing from the suction port toward the compression mechanism side between the suction port and the compression mechanism in the axial direction of the drive shaft. It is possible to guide the fluid to be compressed flowing in from the suction port to the compression mechanism side through the gap between the stator coil and the gap between the stator and the rotor after once flowing to the opposite side of the compression mechanism, thereby promoting the cooling of the stator. It becomes possible.

  Here, a gap extending along the axial direction of the drive shaft is formed between the housing and the stator core at a position different from the fluid introduction passage, and a part of the gap is compressed. By providing a suppression mechanism that suppresses the flow of fluid, it is possible to alleviate the uneven distribution of stress generated in the housing when the stator core is assembled, and even if a gap is provided, go here The compressed fluid sucked from the suction port can be passed through the gap between the coils and the gap between the rotor and the stator, and the cooling of the rotor and the stator can be promoted. It becomes possible.

  Further, according to the above-described configuration, even when the inverter accommodating space that accommodates the inverter board that controls the drive of the electric motor is provided at the axial end opposite to the side where the compression mechanism of the housing is provided, Even when it is provided along the outer peripheral wall of the housing, the inverter can be efficiently cooled.

  By forming the passage cross-sectional area of the fluid introduction passage larger than the passage cross-sectional area of the gap, it becomes possible to avoid an increase in the passage resistance of the fluid introduction passage while facilitating assembly when the stator core is press-fitted. By reducing the gap cross section, the radial dimension of the housing can be suppressed, and the electric compressor can be downsized.

FIG. 1 is a cross-sectional view showing a configuration example of an electric compressor according to the present invention, in which an inverter accommodating space for accommodating an inverter board is provided at an axial end on the opposite side of the housing on which the compression mechanism is provided. A configuration example is shown. FIG. 2 is a cross-sectional view taken along a line (AA line) of the suction port of the electric compressor of FIG. FIG. 3 is a partially cutaway perspective view showing the motor accommodating portion side of the electric compressor according to the present invention. FIG. 4 is a diagram illustrating an example of a suppression mechanism. FIG. 4A illustrates a configuration in which the compression mechanism side opening end of the fluid introduction passage is restricted or closed by a part of the housing (the end surface of the stator on the compression mechanism side). FIG. 4B is a cross-sectional view showing a configuration in which the opening end of the fluid introduction passage is narrowed or closed close to or in contact with the housing, and FIG. 4B is a passage at a portion closer to the compression mechanism than the suction port of the fluid introduction passage. FIG. 4C is a cross-sectional view showing a configuration for narrowing or closing the cross section, and FIG. 4C shows a fluid introduction by bringing a bobbin provided at the coil end closer to or in contact with the inner wall of the housing on the compression mechanism side of the fluid introduction passage. It is sectional drawing which shows the structure which restrict | squeezes or obstruct | occludes the downstream of a channel | path. FIG. 5 is a diagram illustrating an example in which a suppression mechanism (protrusion protruding from the housing) that suppresses the flow of the fluid to be compressed is provided in a part of a gap formed between the housing and the stator core. FIG. 6 is a cross-sectional view showing a configuration example of the electric compressor according to the present invention, and shows a configuration example in which an inverter accommodating space for accommodating the inverter board is provided along the outer peripheral wall of the housing.

  Hereinafter, a configuration example of an electric compressor according to the present invention will be described with reference to the drawings.

  1 to 3 show an electric compressor 1 suitable for a refrigeration cycle using a refrigerant as a working fluid. In this electric compressor 1, a compression mechanism 3 is arranged on the right side in the figure in a housing 2 made of an aluminum alloy, and an electric motor 4 for driving the compression mechanism is arranged on the left side in the figure. . In FIG. 1, the left side in the drawing is the front side of the compressor, and the right side in the drawing is the rear side of the compressor.

  In the housing 2, a compression mechanism housing member 2 a that houses the compression mechanism 3, a motor housing member 2 b that houses a motor 4 that drives the compression mechanism 3, a control circuit that controls driving of the motor 4, and an inverter are integrated. An inverter housing member 2c that houses a substrate (not shown) on which the drive circuit is mounted is fastened in the axial direction with fastening bolts 5.

A partition wall 8 formed integrally with a shaft support portion 8a is provided on the side of the motor housing housing member 2b that faces the compression mechanism housing housing member 2a, and is opposed to the motor housing housing member 2b of the inverter housing housing member 2c. A partition wall 9 in which a shaft support portion 9a is integrally formed is provided on the side to be supported, and the drive shaft 10 is rotatably supported by the shaft support portions 8a and 9a of the partition walls 8 and 9 via bearings 11 and 12, respectively. Yes. Due to the partition walls 8 and 9 formed in the motor housing housing member 2b and the inverter housing housing member 2c, the interior of the housing 2 is a compression mechanism housing space (not shown) for housing the compression mechanism 3 from the rear, and the motor. 4 is defined in an electric motor housing space 12a for housing 4 and an inverter housing space 12b for housing an inverter circuit board.
In this example, the inverter accommodating space 12 b is formed by closing the open end of the inverter accommodating housing member 2 c with the lid 7.

  The compression mechanism 3 is, for example, a known scroll type having a fixed scroll member and an orbiting scroll member disposed opposite thereto, a disc-shaped end plate fixed to a housing, and the end plate A cylindrical outer peripheral wall that is provided along the outer edge of the outer peripheral wall and is erected forward, and a spiral spiral that extends forward from the end plate inside the outer peripheral wall. A fixed scroll member having a wall, a disc-shaped end plate, and a spiral-shaped spiral wall standing rearward from the end plate, and a boss formed on the back surface of the end plate An orbiting scroll member connected to an eccentric shaft provided at a rear end portion of the drive shaft and supported so as to be capable of revolving around the axis of the drive shaft, and a fixed scroll member and an orbiting scroll member, Each spiral wall The engagement is obtained by defining a compression chamber in a space surrounded by the end plates and the spiral wall of the fixed scroll member and the end plate and the spiral wall of the orbiting scroll member.

  Between the outer peripheral wall of the fixed scroll member and the outermost peripheral portion of the spiral wall of the orbiting scroll member, a refrigerant inlet for sucking in a refrigerant introduced from a suction port described later through the motor housing space 12a is formed. A discharge port for discharging the refrigerant gas compressed in the compression chamber is formed in the approximate center of the end plate of the fixed scroll member.

  Therefore, when the rotor 22 rotates and the drive shaft 10 rotates, the orbiting scroll member revolves around the axis of the drive shaft 10, and the compression chamber gradually increases in volume from the outer peripheral side to the center side of the spiral walls of both scroll members. The refrigerant gas is compressed while moving to a small size, and the compressed refrigerant gas is discharged through a discharge port formed in the end plate of the fixed scroll member.

  On the other hand, the stator 21 and the rotor 22 which comprise the electric motor 4 are accommodated in the electric motor accommodation space 12a formed in the part ahead of the partition wall 8 in the housing 2. FIG. The stator 21 includes a cylindrical stator core 24 and a coil 25 (shown by a broken line in FIG. 2) wound around the stator core 24, and is fixed to the inner surface of the housing 2 (electric motor housing member 2b). The drive shaft 10 is fixed with a rotor 22 in which a magnet is accommodated inside the stator 21. The rotor 22 is rotated by the rotating magnetic force formed by the stator 21 to rotate the drive shaft 10. Reference numeral 28 denotes a bobbin attached to an axial end (coil end) of the coil 25.

  A suction port 30 for sucking refrigerant gas is formed on a side surface of the housing 2 (motor housing member 2b) facing the motor housing space 12a, and the refrigerant (compressed fluid) is housed in the motor via the suction port 30. It flows into the space 12a and is guided to the compression mechanism through the motor housing space 12a.

  The stator core 24 is press-fitted into the housing 2 and fixed, and the position of the stator core 24 in the axial direction is fixed by positioning an end face against a step portion 26 formed in the housing. A fluid introduction passage 31 extending along the axial direction of the drive shaft 10 is formed between the housing 2 (electric motor housing member 2b) and the stator 21 (stator core 24). The fluid introduction passage 31 is extended over the entire axial length of the rotor 22, and the inner peripheral wall of the housing 2 is recessed to form a passage between the stator core 24.

  A suction port 30 for introducing the fluid to be compressed is provided at a location facing the outer peripheral surface of the stator core 24 of the housing 2 (electric motor housing member 2b) and connected to the fluid introduction passage 31. In this example, the suction port 30 extends in the radial direction of the stator 21, more specifically, extends upward immediately above the stator and is connected perpendicularly to the fluid introduction passage 31. . In this example, the fluid introduction passage 31 is formed in a portion near the compression mechanism (near the end surface of the stator core 24 on the compression mechanism side) in the portion of the housing that faces the outer peripheral surface of the stator core 24.

Further, a gap 41 extending along the axial direction of the drive shaft is formed between the housing and the stator core at a position different from the fluid introduction passage 31 in the circumferential direction. A plurality of (for example, five) gaps 41 are formed at substantially equal intervals in the circumferential direction. In this example, the inner circumferential wall of the housing is recessed to form a gap with the stator core 24. Yes.
A groove portion 42 is formed in the portion where the fluid introduction passage 31 is formed and the portion where each gap 41 is formed, and the fastening bolt 5 extending in the axial direction through the outer peripheral surface of the stator core 24 is passed. Yes.

  The step portion 26 formed on the inner wall of the housing for positioning the axial direction of the stator core is formed over substantially the entire circumference, and as shown in FIG. 4A, the compression mechanism side opening of the fluid introduction passage 31 is formed. The end is closed by the step portion 26. The first suppression mechanism that suppresses the flow of the refrigerant flowing through the fluid introduction passage 31 from the suction port 30 toward the compressor hole by the stepped portion 26 is the suction port 30 and the compression mechanism 3 in the axial direction of the drive shaft 10. And is configured between.

In addition, the gap 41 is provided with a second suppression mechanism that suppresses the flow of the fluid to be compressed that flows through the gap 41. As shown in FIG. 5, for example, the second suppression mechanism is provided with a protrusion 43 that protrudes toward the stator core side on the inner surface of the housing, and the protrusion 43 is brought close to the stator core 24, or It is configured by contacting the stator core 24. The portion where the protrusion 43 is provided may be a portion of the gap 41 closer to the compression mechanism, a portion closer to the inverter device, or a substantially central portion.
In this example, the passage sectional area of the fluid introduction passage 31 is set larger than the passage sectional area of each gap 41.

  Therefore, the interior of the housing 2 communicates with the space before and after the stator 21 via the gap between the stator core 24 and the rotor 22 and the gap between the coils 25 wound around the stator core 24. And the housing 2 (the motor housing member 2b), the space between the stator 21 and the space before and after the stator 21, and the gap between the coils and between the stator 21 and the rotor 22, from the suction port 30. A suction path that guides the introduced refrigerant to the compression mechanism 3 is formed in the motor housing space 12 a that houses the motor 4.

  In the above configuration, the refrigerant that has flowed into the motor housing space 12a via the suction port 30 enters the fluid introduction passage 31. The end portion on the compression mechanism side of the fluid introduction passage 31 is blocked by the step portion 26 of the housing 2. Since the first suppression mechanism for suppressing the flow of the refrigerant flowing through the fluid introduction passage 31 from the suction port 30 toward the compression mechanism side is provided, the refrigerant that has flowed from the suction port 30 It flows toward the inverter side (the side opposite to the compression mechanism side) and is guided to the space between the stator core 21 and the partition wall 9 (the space in front of the stator 21). Then, it flows along the inverter accommodating space 12b (along the partition wall 9), moves to the compressor side through the gap between the coils and the gap between the stator 21 and the rotor 22, and the compression mechanism It is led into the compression mechanism from a refrigerant inlet (not shown).

  Therefore, even when the suction port 30 is provided at a location facing the outer peripheral surface of the stator core 24, the refrigerant can be reliably guided to the compression mechanism 3 through the gaps between the coils and between the stator 21 and the rotor 22. It becomes possible to cool 21 effectively. Further, since it is not necessary to provide the suction port 30 on the outer periphery of the housing between the stator 21 and the partition wall 9 in order to cool the inverter, the axial dimension between them can be shortened. It is possible to reduce the size.

  Further, since the gap 41 is provided, it is possible to alleviate the uneven distribution of stress generated in the housing 2 when the stator core 24 is assembled by being press-fitted into the housing 2, and when the gap 41 is provided. However, since the flow of the refrigerant to the gap 41 is suppressed by the second suppression mechanism (the protrusion 43), the refrigerant introduced between the stator core 24 and the partition wall 9 is between the coils or between the stator 21 and the rotor. Therefore, the cooling of the stator 21 is not impaired.

  In the above-described configuration example, the compression mechanism side end surface of the stator core 24 is brought into contact with the step portion 26 of the housing 2, and the compressor side opening end of the refrigerant introduction passage 31 is closed by the step portion 26. However, it is not always necessary to close the compressor-side opening end of the refrigerant introduction passage 31, and the stepped portion 26 is brought close to the compressor-side opening end of the refrigerant introduction passage 31 so that the refrigerant flows. You may make it comprise a 1st suppression mechanism by forming the state which is hard to flow.

  Further, as shown in FIG. 4B, the first suppression mechanism is provided with, for example, a protrusion 27 that protrudes inward from the inner wall of the housing 2, and is closer to the compression mechanism than the suction port 30 of the fluid introduction passage 31. 4C, the bobbin 28 provided at the coil end on the compression mechanism side with respect to the fluid introduction passage 31 has a housing as shown in FIG. 4C. It may be configured by narrowing or closing the downstream side of the fluid introduction passage 31 by being close to or abutting the inner wall of the fluid.

  Further, with respect to the second suppression mechanism, it is also possible to adopt the configuration shown in FIGS. 4A to 4C in the same manner as the first suppression mechanism, instead of the protrusion 43 protruding from the inner surface of the housing. .

In the above configuration, the inverter accommodating space 12b is provided at the axial end of the housing 2 opposite to the side where the compression mechanism 3 is provided. However, as shown in FIG. An inverter housing space 12 b that houses an inverter board that controls the drive of the motor 4 may be provided along the outer peripheral wall of the housing 2. In this example, it is provided along the passage on the outside in the radial direction of the fluid introduction passage 31 (in the drawing, immediately above the fluid introduction passage 31).
Even in such a configuration, the inverter can be cooled by the refrigerant flowing through the motor housing space 12a that houses the motor 4 (particularly, by the refrigerant flowing through the fluid introduction passage 31 between the housing 2 and the stator core 24). Become.

DESCRIPTION OF SYMBOLS 1 Electric compressor 2 Housing 2b Motor accommodating housing member 3 Compression mechanism 4 Electric motor 12a Electric motor accommodating space 12b Inverter accommodating space 21 Stator 22 Rotor 24 Stator core 25 Coil 26 Stepped part 30 Suction port 31 Fluid introduction passage 41 Gap

Claims (6)

The housing includes a compression mechanism and an electric motor that drives the compression mechanism. The electric motor is fixedly mounted on a stator formed by winding a coil around a stator core fixed in the housing, and a drive shaft. An electric compressor that has a rotor rotatably disposed inside the stator and guides the fluid to be compressed to the compression mechanism through a motor housing space in which the motor is housed.
Forming a fluid introduction passage extending along the axial direction of the drive shaft between the housing and the stator core;
An electric compressor characterized in that a suction port for introducing the fluid to be compressed is provided at a location facing the outer peripheral surface of the stator core of the housing and connected to the fluid introduction passage.   A suppression mechanism is provided between the suction port and the compression mechanism in the axial direction of the drive shaft to suppress the flow of the fluid to be compressed flowing through the fluid introduction passage from the suction port toward the compression mechanism. The electric compressor according to claim 1. A gap extending along the axial direction of the drive shaft is formed between the housing and the stator core at a position different from the fluid introduction passage,
The electric compressor according to claim 1, wherein a suppression mechanism for suppressing a flow of the fluid to be compressed is provided in a part of the gap.   The inverter housing space that houses an inverter board that drives and controls the electric motor is provided at an axial end of the housing opposite to the side on which the compression mechanism is provided. The electric compressor described in 1.   The electric compressor according to any one of claims 1 to 3, wherein an inverter accommodating space that accommodates an inverter board that drives and controls the electric motor is provided along an outer peripheral wall of the housing.   The compressor according to any one of claims 1 to 5, wherein a passage sectional area of the fluid introduction passage is larger than a passage sectional area of the gap.

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