JP2004027847A - Electric compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric compressor capable of achieving high durability and efficiency using an inexpensive structure that is advantageous as a structure for using carbon dioxide refrigerant. <P>SOLUTION: In the electric compressor, a swash pate 23 having a fixed inclination angle has its rotational movement converted into the oscillating movement of an oscillating plate 24 which oscillates as it is restrained from rotating about its axis, and each piston 21 is driven by the oscillation of the oscillating plate 24, so a structure without sliding parts based on rotation of the swash plate 23 can be provided while enhancing durability. Thus, a high-efficiency compression capability based on pistons can be achieved and the inexpensive structure can achieve high durability and efficiency. The structure is significantly advantageous as a structure for using carbon dioxide refrigerant. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric compressor used for a vehicle air conditioner using a carbon dioxide refrigerant.
[0002]
[Prior art]
Generally, as this type of electric compressor, for example, as described in Japanese Patent Application Laid-Open No. 2000-291557, one of a pair of spiral members is caused to perform a predetermined turning motion while facing the other spiral member. In addition to a so-called scroll type compressor that compresses a refrigerant, a piston having an outer diameter smaller than the inner diameter of the cylinder is turned along the inner peripheral surface of the cylinder as described in, for example, JP-A-2000-291557. There is known a so-called rolling piston type in which a refrigerant is compressed by moving.
[0003]
[Problems to be solved by the invention]
However, when a carbon dioxide refrigerant is used, the pressure becomes higher than that of a conventional CFC gas or HFC gas. Therefore, there is a problem that the rotary type compressor as described above cannot maintain a sufficient sealing property of the compression chamber. there were.
[0004]
Therefore, as a piston-type compressor capable of ensuring the sealing performance of the compression chamber even under high pressure conditions, for example, as described in Japanese Patent Application Laid-Open No. 2001-304127, the rotation of a motor is controlled by a reciprocating motion of a piston by an inclined plate. There is known one that is converted to. However, in order to obtain high pressure, it is necessary to rotate the inclined plate at high speed.However, in the structure using the inclined plate, since the inclined plate rotates while contacting the shoe on the piston side, the sliding portion of the shoe and the inclined plate There was a problem in durability under high load conditions and severe lubrication conditions. For this reason, when a refrigeration circuit using a carbon dioxide refrigerant is put into practical use, there is a problem that the cost is increased, for example, by using high-strength and expensive main parts for increasing the durability of the compressor. there were.
[0005]
The present invention has been made in view of the above-mentioned problems, and an object thereof is to achieve high durability and high efficiency with an inexpensive structure, which is advantageous as a structure for using a carbon dioxide refrigerant. To provide a simple electric compressor.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a plurality of cylinders arranged in a circumferential direction on one end side of a compressor body, a plurality of pistons reciprocating in each cylinder, An electric compressor having a drive shaft for driving the motor and a motor for rotating the drive shaft, and each piston is reciprocated in the axial direction of the drive shaft to suck and discharge the refrigerant. Each piston is connected via an inclined member having an inclined surface forming a predetermined fixed inclination angle with respect to the drive shaft and rotating integrally with the drive shaft, and a connecting member having a universal joint at a predetermined position in the circumferential direction. A swing member that reciprocates each piston by swinging while being restricted from rotating along the inclined surface of the rotating inclined member, wherein a carbon dioxide refrigerant is used as the refrigerant. .
[0007]
Accordingly, when the drive shaft is rotated by the motor, the inclined member is rotated, and the swinging member is swung along the inclined surface of the inclined member while its rotation is restricted, and the connection of each piston connected to the swinging member is performed. Since the members are sequentially displaced in the axial direction of the drive shaft and each piston reciprocates, there is no sliding portion due to the rotation of the inclined member, high load using carbon dioxide refrigerant and poor use conditions with poor lubrication conditions In this case, a highly durable structure is obtained.
[0008]
According to a second aspect of the present invention, in the electric compressor according to the first aspect, a refrigerant suction chamber for housing a refrigerant drawn into each cylinder and a refrigerant discharged from each cylinder are provided at one end of the compressor body. In addition to providing a discharge chamber, the refrigerant suction chamber is formed at the center of one end of the compressor body, and the refrigerant discharge chamber is formed annularly around the refrigerant suction chamber.
[0009]
Accordingly, in addition to the operation of the first aspect, the refrigerant discharge chamber is formed in an annular shape around the refrigerant suction chamber, so that the refrigerant discharge chamber is formed at the center on one end side of the compressor body. The surface area of the discharge chamber becomes smaller, and the total force of the refrigerant applied to the wall surface of the compressor body becomes smaller.
[0010]
According to a third aspect of the present invention, in the electric compressor according to the first or second aspect, a refrigerant suction port is provided at the other end of the compressor main body, and the refrigerant sucked from the refrigerant suction port flows through the inside of the compressor main body. From each cylinder.
[0011]
Thus, in addition to the function of the first or second aspect, the refrigerant sucked into the other end of the compressor body is drawn into the cylinder after flowing through the movable part and the sliding part in the compressor body. Therefore, the movable portion and the sliding portion are lubricated by the refrigerant mixed with the lubricating oil. Further, the pulsation of the suction-side refrigerant is attenuated by the buffering action when the refrigerant flows through the movable part and the sliding part.
[0012]
According to a fourth aspect, in the electric compressor according to the first, second, or third aspect, the inclined member is provided at one end of the drive shaft, and the motor is arranged at the other end of the drive shaft. The support is made only by at least one bearing arranged on the other end side of the inclined member.
[0013]
Accordingly, in addition to the operation of the first, second, or third aspect, the drive shaft is supported only by the bearing disposed on the other end side of the inclined member. Does not require any components to support the drive shaft.
[0014]
According to a fifth aspect of the present invention, in the electric compressor according to the fourth aspect, the first housing disposed on the piston, the swinging member, and the inclined member side, and the second housing disposed on the motor side. And an intermediate plate having a bearing for the drive shaft is provided between the housings.
[0015]
Accordingly, in addition to the function of the fourth aspect, the intermediate plate provided between the housings can support the thrust force of the inclined member and the radial force of the drive shaft with high strength.
[0016]
According to a sixth aspect of the present invention, in the electric compressor according to the first, second or third aspect, the inclined member is provided so that one end of the drive shaft penetrates, and the motor is disposed at the other end of the drive shaft. The other end of the drive shaft is supported by a bearing, and one end of the drive shaft is provided with support means for rotatably supporting one end of the drive shaft and swingably supporting a swing member.
[0017]
Accordingly, in addition to the operation of the first, second, or third aspect, the one end side of the drive shaft is rotatably supported by the support means, and the swing member is swingably supported by the support means. There is no need to provide a dedicated bearing for supporting one end of the shaft.
[0018]
According to a seventh aspect of the present invention, in the electric compressor according to the sixth aspect, the support means includes a sphere having one end of a drive shaft connected thereto and slidably engaged with a center portion of the swinging member, and a slidable sphere. And a sphere support member that freely supports the sphere support member.
[0019]
Thus, in addition to the function of claim 6, the sphere of the drive shaft is rotatably supported by the sphere support member, and the swing member is swingably supported by the sphere. The movement and the swing of the swing member are achieved by a common sphere.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 3 show an embodiment of the present invention. FIG. 1 is a side sectional view of an electric compressor, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. It is sectional drawing in the BB line arrow direction.
[0021]
This electric compressor includes a compressor main body 10 that sucks and discharges a refrigerant, a compression unit 20 that compresses the refrigerant sucked into the compressor main body 10, and a motor 30 that drives the compression unit 20.
[0022]
The compressor body 10 is formed in a cylindrical shape, and is disposed on a first housing 11 formed on the compression section 20 side, a second housing 12 formed on the motor 30 side, and on one end side of the first housing 11. A cylinder head 13, a valve plate 14 disposed between the first housing 11 and the cylinder head 13, and an intermediate plate 15 disposed between the housings 11.
[0023]
The first housing 11 has a plurality of cylinders 11 a arranged at equal intervals in the circumferential direction on one end side, and one end of each cylinder 11 a is opened on one end surface side of the first housing 11. The first housing 11 has a plurality of refrigerant passages 11b penetrating one end thereof, and each refrigerant passage 11b is disposed between each cylinder 11a. The first housing 11 has an opening at the other end, and is connected to one end of the second housing 12 by a bolt 11c via an intermediate plate 15.
[0024]
The second housing 12 has an opening at one end, and a refrigerant inlet 12a at the other end.
[0025]
The cylinder head 13 is attached to one end of the first housing 11 via a valve plate 14, and a refrigerant suction chamber 13 a that opens toward the valve plate 14 is provided at the center of the cylinder head 13. An annular refrigerant discharge chamber 13b opening toward the valve plate 14 is provided around the refrigerant suction chamber 13a, and the refrigerant discharge chamber 13b communicates with a refrigerant discharge port 13c provided on a side surface of the cylinder head 13.
[0026]
The valve plate 14 is provided with a plurality of refrigerant suction ports 14a and discharge ports 14b respectively communicating with the cylinders 11a, and each of the refrigerant suction ports 14a communicates with the refrigerant suction chamber 13a of the cylinder head 13, respectively. 14b communicates with the refrigerant discharge chamber 13b. A plate-shaped suction valve 14c and a discharge valve 14d for opening and closing the refrigerant suction port 14a and the discharge port 14b, respectively, are attached to the valve plate 14. Each of the refrigerant suction port 14a and the discharge port 14b is elastically deformed by the valve 14c, 14d. Is opened and closed. A through hole 14e is provided at the center of the valve plate 14, and a plurality of communication holes 14f communicating with the respective refrigerant passages 11b of the first housing 11 are provided around the through hole 14e.
[0027]
The intermediate plate 15 is formed to have a size to cover the openings of the housings 11 and 12, and is attached such that the peripheral end is sandwiched between the end surfaces of the housings 11 and 12. The intermediate plate 15 has a plurality of communication holes 15a communicating with the housings 11 and 12, and a bearing 15b formed of a roller bearing is provided at the center thereof.
[0028]
The compression unit 20 swings by a plurality of pistons 21 provided in each of the cylinders 11a, a drive shaft 22 rotated by the motor 30, an inclined plate 23 rotated by the drive shaft 22, and a rotation of the inclined plate 23. Each of the pistons 21 is connected to the rocking plate 24 via a plurality of piston rods 25 forming a connecting member.
[0029]
Each piston 21 has a piston ring 21a attached to a peripheral surface on one end side, and a spherical connecting portion 21b for connecting a piston rod 25 on the other end side.
[0030]
The drive shaft 22 extends in the first and second housings 11 and 12, and has one end disposed in the first housing 11 and a roller bearing provided on the other end of the second housing 12. Two positions in the axial direction are rotatably supported by the bearing 22a and the bearing 15b of the intermediate plate 15.
[0031]
The inclined plate 23 is attached to one end of the drive shaft 22 and rotates integrally with the drive shaft 22. An inclined surface 23a is formed at one end of the inclined plate 23 at a predetermined inclination angle with respect to the rotation axis of the drive shaft 22, and the inclination angle is fixed to, for example, 15 °. A roller bearing 23b is provided between the other end surface of the inclined plate 23 and the intermediate plate 15.
[0032]
The oscillating plate 24 is arranged on the inclined surface 23a side of the inclined plate 23, and is inclined along the inclined surface 23a. In this case, the swing plate 24 allows the rotation of the inclined plate 23 with respect to the swing plate 24 by a roller bearing 24a disposed between the swing plate 24 and the inclined surface 23a. A sphere 26 that supports the swing plate 24 so as to be able to swing is provided at one end of the swing plate 24. That is, an engagement member 27 that engages with the sphere 26 is attached to the center of the swing plate 24, and the engagement member 27 slidably receives the sphere 26 on a substantially hemispherical spherical portion. Further, the first housing 11 is provided with a sphere support member 28 that engages with the sphere 26, and the sphere support member 28 slidably receives the sphere 26 on a substantially hemispherical spherical portion. That is, the swing plate 24 is supported by the support member 28 via the sphere 26, and swings while rotating along the spherical surface of the sphere 26. Further, the sphere support member 28 is provided with a communication hole 28b that communicates the spherical portion supporting the sphere 26 with the through hole 14e of the valve plate 14. The engaging member 27 and the sphere support member 28 of the rocking plate 24 are provided with gears 27a and 28a that mesh with each other, and the rotation of the rocking plate 24 is regulated by the meshing of the gears 27a and 28a. Further, the swing plate 24 is provided with a plurality of spherical connecting portions 24b for connecting the respective piston rods 25, and the connecting portions 24b are arranged at equal intervals in the circumferential direction.
[0033]
Each piston rod 25 has a spherical connecting portion 25a at each end, a connecting portion 25a at one end is slidably connected to a connecting portion 21b of the piston 21, and a connecting portion 25a at the other end is a swing plate 24. Is slidably connected to the connecting portion 24d. That is, the connecting portions 21b, 24d, and 25a form a universal joint.
[0034]
The motor 30 includes a stator 31 fixed to the inner peripheral surface of the second housing 12, a rotor 32 composed of a permanent magnet rotating inside the stator 31, and an exciting coil wound around a plurality of locations in the circumferential direction of the stator 31. The rotor 32 is attached to the other end of the drive shaft 22 so as to rotate integrally therewith. That is, the motor 30 is a three-phase AC brushless motor.
[0035]
In the electric compressor configured as described above, when the drive shaft 22 is rotated by the motor 30, the inclined plate 23 is rotated, and the swing plate 24 swings along the inclined surface 23a of the inclined plate 23. At this time, the swing plate 24 swings about the sphere 26 while its rotation is restricted by the gears 27a and 28a. Accordingly, each piston rod 25 connected to the swing plate 24 is sequentially displaced in the axial direction of the drive shaft 22, and each piston 21 reciprocates in each cylinder 11a with a predetermined phase difference. Further, the reciprocating motion of each piston 21 causes the refrigerant in the refrigerant suction chamber 13a to be sucked into each cylinder 11a and discharged to the refrigerant discharge chamber 13b. At this time, the refrigerant drawn into the compressor body 10 from the refrigerant suction port 12a of the second housing 12 passes through the gap of the motor 30 and passes through the communication holes 15a of the intermediate plate 15 and the bearing 15b. The refrigerant flows into the first housing 11 and is sucked into the refrigerant suction chamber 13a through the refrigerant passages 11b of the first housing 11 and the communication holes 28a of the sphere support member 28. In this case, since lubricating oil is mixed with the refrigerant, lubrication is performed not only on the movable parts such as the motor 30 and the bearing 15b, but also on the sliding parts of the sphere 26. Although a little, the refrigerant also flows between the cylinders 11a and the pistons 21 to lubricate them.
[0036]
The electric compressor is used for a refrigeration circuit using a carbon dioxide refrigerant in a vehicle air conditioner. In this case, the pressure of the carbon dioxide refrigerant in the refrigeration cycle is about 10 times higher than that of the CFC refrigerant (R134a).
[0037]
As described above, according to the electric compressor of the present embodiment, the rotational movement of the inclined plate 23 having the predetermined fixed inclination angle is converted into the swing movement of the swing plate 24 that swings while the rotation is restricted. Since each of the pistons 21 is driven by the swinging of the swinging plate 24, a structure having no sliding portion due to the rotation of the inclined plate 23 can be provided, and high load and lubrication conditions using carbon dioxide refrigerant can be obtained. It is possible to improve the durability even under severe use conditions of poor quality. Therefore, high efficiency compression performance by the piston type can be obtained, and high durability and high efficiency can be realized by an inexpensive structure, which is extremely advantageous as a structure for using a carbon dioxide refrigerant.
[0038]
Further, the refrigerant drawn into the compressor body 10 flows through the movable parts such as the motor 30 and the bearing 15a, as well as the sliding part of the sphere 26, and then is drawn into the refrigerant suction chamber 13a of the cylinder head 13. As a result, it is possible to reliably lubricate each movable portion and sliding portion with a refrigerant mixed with lubricating oil, and to achieve high durability even under severe lubrication conditions when using a carbon dioxide refrigerant. Can be. In this case, the pulsation of the suction-side refrigerant can be attenuated by the buffering action when the refrigerant flows through the movable portion and the sliding portion, and therefore, the suction pressure that is likely to be generated in the reciprocating compressor as in the present embodiment. Pulsation can be greatly reduced, and a refrigeration cycle with extremely low noise can be realized.
[0039]
Further, since the refrigerant suction chamber 13a is formed in the center of the cylinder head 13, and the high pressure refrigerant discharge chamber 13b is formed annularly around the refrigerant suction chamber 13a, the refrigerant discharge chamber 13b is formed in the center of the cylinder head 13. The surface area of the refrigerant discharge chamber 13b can be reduced as compared with the case where it is formed, and the force as the total pressure of the refrigerant applied to the wall surface of the compressor body 10 can be reduced. Therefore, even a low-strength structure can be used, and the weight and cost can be reduced.
[0040]
In addition, the inclined plate 23 is attached to one end of the drive shaft 22, a motor 30 is arranged on the other end of the drive shaft 22, and only the bearings 15 b and 22 a are arranged on the other end of the inclined plate 23. Since the support is provided, no component for supporting the drive shaft 22 is required at one end of the drive shaft 22, that is, at one end of the inclined plate 23, so that the assemblability can be improved and the structure can be simplified. it can. For example, the pistons 21 and the rocking plate 24 are assembled on the first housing 11 side, and the motor 30, the drive shaft 22 on which the inclined plate 23 is mounted, and the intermediate plate 15 are assembled on the second housing 12 side. After that, if these assemblies are connected to each other with bolts 11c, the assembling work can be performed extremely easily.
[0041]
In this case, since the intermediate plate 15 having the bearing 15b of the drive shaft 22 is provided between the housings 11 and 12, the thrust force of the inclined plate 23 and the radial force of the drive shaft 22 are reliably fixed between the housings 11 and 12. This can be received by the provided intermediate plate 15, and the durability can be improved. Since the drive shaft 22 can be supported by the intermediate plate 15 with high strength, the bearing 22a at the other end of the drive shaft 22 can be omitted.
[0042]
FIG. 4 is a side sectional view of an electric compressor showing another embodiment of the present invention. In this embodiment, the configurations of a drive shaft, an inclined plate, and a sphere are different from those of the above embodiment. Note that the same components as those in the above embodiment will be described with the same reference numerals.
[0043]
That is, in the present embodiment, the inclined plate 40 is provided so that one end of the drive shaft 41 penetrates, the other end of the drive shaft 41 is supported by the bearing 41 a, and the sphere 42 provided on one end of the drive shaft 41 is used. One end of the drive shaft 41 is rotatably supported, and the inclined plate 40 is swingably supported. Further, in this embodiment, a configuration corresponding to the intermediate plate 15 of the above embodiment is not provided, and the housings 11 and 12 are directly connected to each other.
[0044]
The inclined plate 40 has an inclined surface 40a having a predetermined fixed inclination angle on one end side, as in the above-described embodiment. One end of the drive shaft 41 penetrates through the center of the inclined plate 40, and the inclined plate 40 rotates integrally with the drive shaft 41.
[0045]
As the bearing 41a for supporting the other end of the drive shaft 41, an angular ball bearing for simultaneously restricting the axial and radial movement of the drive shaft 41 is used, but may be constituted by a thrust and a journal bearing. .
[0046]
The sphere 42 is slidably supported by the sphere support member 28 as in the above embodiment. In this case, the sphere 42 has a hole into which one end of the drive shaft 41 is inserted, and is connected to one end of the drive shaft 41.
[0047]
According to the present embodiment, one end of the drive shaft 41 is rotatably supported by the sphere 42 and the sphere support member 28, and the swing plate 24 is swingably supported by the sphere 42. There is no need to provide a dedicated bearing or an intermediate plate for supporting one end of the shaft 41, and the number of parts can be reduced.
[0048]
In this case, the support means for supporting one end side of the drive shaft 41 is composed of a sphere 42 slidably engaged with the center of the rocking plate 40 and a sphere support member 28 slidably supporting the sphere 42. Since one end of the drive shaft 41 is connected to the sphere 42, the rotation of the drive shaft 41 and the swing of the swing plate 40 can be achieved by the common sphere 42, and the one end of the drive shaft 41 The support mechanism can be simplified and downsized.
[0049]
【The invention's effect】
As described above, according to the electric compressor of the first aspect, since it is possible to have a structure that does not have a sliding portion due to the rotation of the inclined member, a high load using carbon dioxide refrigerant and poor lubrication conditions are severe. The durability can be improved even under use conditions. Therefore, high efficiency compression performance by the piston type can be obtained, and high durability and high efficiency can be realized by an inexpensive structure, which is extremely advantageous as a structure for using a carbon dioxide refrigerant.
[0050]
According to the electric compressor of the second aspect, in addition to the effect of the first aspect, the force as the total sum of the pressure of the refrigerant applied to the wall surface of the compressor body can be reduced, so that the compressor has a low strength structure. However, it can be used, and the weight and cost can be reduced.
The durability can be further improved.
[0051]
According to the electric compressor of the third aspect, in addition to the effect of the first or second aspect, the movable portion and the sliding portion in the compressor main body can be reliably lubricated. Even under severe lubrication conditions, high durability can be realized. In addition, since the pulsation of the suction side refrigerant can be attenuated, the suction pressure pulsation that is likely to occur in the reciprocating compressor can be significantly reduced, and a refrigeration cycle with extremely low noise can be realized.
[0052]
According to the electric compressor of the fourth aspect, in addition to the effects of the first, second, or third aspect, a component for supporting the drive shaft at one end of the inclined member is not required, so that the assemblability can be improved. The structure can be simplified.
[0053]
According to the electric compressor of the fifth aspect, in addition to the effect of the fourth aspect, the thrust force of the inclined member and the radial force of the drive shaft can be received by the intermediate plate securely fixed between the housings. Thus, the durability can be improved. In this case, since the drive shaft can be supported by the intermediate plate with high strength, the drive shaft can be supported only by the intermediate plate, and the structure can be further simplified by omitting other bearings. .
[0054]
According to the electric compressor of the sixth aspect, in addition to the effects of the first, second, or third aspect, it is not necessary to provide a dedicated bearing for supporting one end of the drive shaft, so that the number of parts can be reduced. it can.
[0055]
According to the electric compressor of the seventh aspect, in addition to the effect of the sixth aspect, the rotation of the drive shaft and the swing of the swing member can be achieved by using the sphere of the common support means. In addition, the mechanism for supporting the drive shaft can be simplified and downsized.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an electric compressor showing one embodiment of the present invention. FIG. 2 is a sectional view taken along line AA of FIG. 1. FIG. 3 is a sectional view taken along line BB of FIG. FIG. 4 is a cross-sectional side view of an electric compressor showing another embodiment of the present invention.
DESCRIPTION OF SYMBOLS 10 ... Compressor main body, 11 ... 1st housing, 12 ... 2nd housing, 15 ... Intermediate plate, 15b ... Bearing, 11a ... Cylinder, 13a ... Refrigerant suction chamber, 13b ... Refrigerant discharge chamber, 21 ... Piston, 22 ... drive shaft, 22a ... bearing, 23 ... inclined plate, 24 ... rocking plate, 26 ... sphere, 28 ... sphere support member, 30 ... motor, 40 ... inclined plate, 41 ... drive shaft, 41a ... bearing, 42 ... sphere .

Claims (7)

A plurality of cylinders arranged in a circumferential direction on one end side of the compressor body, a plurality of pistons reciprocating in each cylinder, a drive shaft for driving each piston, and a motor for rotating the drive shaft are provided. In an electric compressor in which each piston is reciprocated in the axial direction of the drive shaft to suck and discharge the refrigerant,
An inclined member having an inclined surface that forms a predetermined fixed inclination angle with respect to the drive shaft at one end, and that rotates integrally with the drive shaft,
A swing member that is connected to each piston via a connecting member having a universal joint at a predetermined position in a circumferential direction, and that reciprocates each piston by swinging while restricting rotation along an inclined surface of a rotating inclined member. With
An electric compressor, wherein a carbon dioxide refrigerant is used as the refrigerant. On one end side of the compressor main body, a refrigerant suction chamber that stores refrigerant sucked into each cylinder and a refrigerant discharge chamber where refrigerant is discharged from each cylinder are provided.
2. The electric compressor according to claim 1, wherein the refrigerant suction chamber is formed at a central portion on one end side of the compressor main body, and the refrigerant discharge chamber is formed in an annular shape around the refrigerant suction chamber. A refrigerant suction port is provided at the other end of the compressor main body, and refrigerant sucked from the refrigerant suction port flows through the compressor main body and is then sucked into each cylinder. 3. The electric compressor according to 1 or 2. The tilt member is provided at one end of a drive shaft, and the motor is arranged at the other end of the drive shaft,
4. The electric compressor according to claim 1, wherein the drive shaft is supported by only at least one bearing disposed on the other end side of the inclined member. A first housing disposed on the piston, the swing member and the inclined member side, and a second housing disposed on the motor side;
The electric compressor according to claim 4, wherein an intermediate plate having a bearing for the drive shaft is provided between the housings. While providing the inclined member so that one end side of the drive shaft penetrates, the motor is disposed on the other end side of the drive shaft,
While supporting the other end of the drive shaft with a bearing,
4. The electric compression device according to claim 1, wherein one end of the drive shaft is provided with support means for rotatably supporting one end of the drive shaft and swingably supporting a swing member. Machine. The support means includes a sphere to which one end of a drive shaft is connected and slidably engages with a center portion of the swinging member, and a sphere support member which slidably supports the sphere. The electric compressor according to claim 6.

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