JP6722877B2 - Scroll compressor - Google Patents

Description

The present disclosure relates to a scroll compressor used for a vehicle air conditioner or the like.

For example, a scroll compressor is used as a compressor used for a vehicle air conditioner. The scroll compressor has a fixed scroll and a revolving scroll each having a spiral partition wall. A compression chamber is formed between these scrolls. The fixed scroll is housed in a closed container and is fixed to the closed container. On the other hand, the orbiting scroll is supported by the drive shaft so as to be able to orbit around a predetermined axis. Therefore, when the internal pressure of the compression chamber rises, the orbiting scroll may be pushed by the pressure. Then, the gap between the fixed scroll forming the compression chamber and the orbiting scroll increases, so that gas leakage during compression increases and compression efficiency decreases.

On the other hand, a technique has been proposed in which high-pressure gas in the compression chamber is supplied to the back pressure side of the orbiting scroll (for example, Patent Document 1). Specifically, there is disclosed a compression chamber in which a communication hole is provided so as to connect the compression chamber side and the opposite side to the orbiting scroll. In Patent Document 1, with such a configuration, the back pressure of the orbiting scroll is appropriately maintained, and the friction loss between the fixed scroll and the orbiting scroll is reduced.

Further, in the scroll compressor, the fixed scroll and the orbiting scroll come into sliding contact with each other at high speed during operation. Therefore, the surface of the orbiting scroll is plated with a hard material to prevent seizure (for example, Patent Document 2).

JP, 6-213175, A JP-A-2-283884

However, when the orbiting scroll is plated with a hard material, the surface of the orbiting scroll is covered with the hard material. Therefore, it is difficult to perforate after the plating process, and it is difficult to form the communication hole as in Patent Document 1. Further, if the holes are pierced, burrs are formed at the openings, so post-treatment for removing burrs is required. On the other hand, if the order is changed and the plating process is performed after perforation, the openings may become smaller or blocked. Therefore, this method also requires post-treatment to form an appropriate opening.

The present disclosure does not require post-processing for burr generation, blockage of an opening, and the like even when the orbiting scroll is plated with a hard material, and can provide an appropriate back pressure to the orbiting scroll. Provide a compressor.

The scroll compressor according to the present disclosure has a fixed scroll, an orbiting scroll, a drive shaft, a bearing portion, and a communication passage. The fixed scroll has a first surface provided with a spiral first partition wall and a second surface opposite to the first surface. The orbiting scroll has a spiral second partition wall that meshes with the first partition wall to form a compression chamber, and faces the first surface of the fixed scroll. The drive shaft orbits the orbiting scroll. The bearing portion supports this drive shaft. A back pressure chamber surrounded by the orbiting scroll and the bearing portion is provided on the opposite side of the orbiting scroll from the compression chamber. The inlet of the communication passage is opened toward the compression chamber by the fixed scroll, and the outlet is opened toward the back pressure chamber at the bearing.

According to the present disclosure, the inlet of the communication passage is formed in the fixed scroll that is not plated. Therefore, even if the orbiting scroll is plated with a hard material, it is possible to apply an appropriate back pressure to the orbiting scroll without the need for post-processing for burr generation, blockage of the opening, and the like.

FIG. 1 is a sectional view showing a configuration of a scroll compressor according to an embodiment of the present disclosure. FIG. 2 is an enlarged sectional view showing a part of the compressor shown in FIG. FIG. 3 is a cross-sectional view showing a configuration of a scroll compressor according to a modified example of the embodiment of the present disclosure. FIG. 4 is a cross-sectional view showing a part of the compressor shown in FIG. 3 in an enlarged manner.

Hereinafter, an embodiment of the present disclosure will be described by taking a case where it is applied to a scroll compressor used for an air conditioner of a vehicle as an example.

FIG. 1 is a cross-sectional view showing a configuration of a scroll compressor (hereinafter, compressor) 100 according to an embodiment of the present disclosure. The compressor 100 includes a closed container 1, and an electric element 2 and a compression element 3 housed in the closed container 1. The closed container 1 has a substantially cylindrical shape and is horizontally placed so that its axis A is substantially horizontal.

The closed container 1 has a cylindrical main container 10, a first end closing part 11, and a second end closing part 12. Both ends (first end, second end) in the axial direction of the main container 10 are open. The first end closing portion 11 closes the opening at the first end of the main container 10. The second end closing portion 12 closes the opening at the second end of the main container 10. The first end closing part 11 is provided with a suction port 13 for taking in an external refrigerant, and the second end closing part 12 is provided with a discharge port 14 for sending out the refrigerant to the outside. The compressor 100 compresses the low-pressure refrigerant, which is taken into the closed container 1 through the suction port 13 from the outside, by the compression element 3 driven by the electric element 2, and sends the high-pressure refrigerant to the outside through the discharge port 14.

In the following description, with respect to the main container 10, the side on which the first end closing portion 11 is provided is the “first end side”, and the side on which the second end closing portion 12 is provided is the “second end”. It may be referred to as "end side".

Next, the electric element 2 will be described. The electric element 2 has a drive shaft 20, a bearing portion 21, a rotor 22, and a stator 23. The drive shaft 20 has a main shaft 25 and an eccentric shaft 26 provided at one end of the main shaft 25. The bearing portion 21 is internally fitted and provided in the main container 10 near the center in the direction of the axis A. The bearing portion 21 has a substantially disk-shaped partition wall 28 and a cylindrical wall 29. The partition wall 28 divides the internal space of the main container 10 into two parts (first end side and second end side) along the axis A direction. The cylindrical wall 29 extends from the outer peripheral portion of the partition wall 28 toward the first end.

A main shaft support portion 30 having a large diameter hole is provided in the center of the partition wall 28, and a bearing 31 such as a radial ball bearing is provided in the large diameter hole. On the other hand, a secondary shaft support portion 32 having a small diameter hole is provided at the second end of the main container 10, and a bearing 33 such as a radial ball bearing is also provided in this small diameter hole. Then, one end of the main shaft 25 of the drive shaft 20 is supported by a bearing 31 of the main shaft support portion 30, and the other end is supported by a bearing 33 of the auxiliary shaft support portion 32. With such a structure, the main shaft 25 is rotatably provided so that the axial center thereof coincides with the axial center A of the main container 10.

A pump 35 that is driven by the rotation of the drive shaft 20 is provided on the side of the auxiliary shaft support 32 opposite to the main shaft support 30 in order to pump up the lubricating oil in the closed container 1 and send it to the proper place. In addition, a suction passage 36 that connects the inner bottom portion (liquid storage portion) of the closed container 1 and the pump chamber of the pump 35 is formed in the second end blocking portion 12. Further, the drive shaft 20 has an oil supply passage 37 formed along the axis thereof.

Therefore, when the pump 35 is driven, the lubricating oil stored in the inner bottom portion of the closed container 1 is sucked up through the suction passage 36, and a part of the lubricating oil is supplied to the bearing 33 of the auxiliary shaft support portion 32. The supplied lubricating oil lubricates the bearing 33. The remaining lubricating oil is sent out through the oil supply passage 37 and supplied to the bearing 31 of the main shaft support portion 30 and a bearing 66 described later to lubricate them.

The rotor 22 is, for example, formed into a cylindrical shape by laminating a plurality of disk-shaped magnetic bodies having a central hole, and is externally fitted to the drive shaft 20. Further, a permanent magnet is housed in the laminated body of magnetic materials, and the rotor 22 has magnetism due to the permanent magnet. The stator 23 is formed in a tubular shape as a whole by arranging a plurality of coils, around which a conductive wire is wound, in a circular shape so as to surround the outer periphery of the rotor 22. The stator 23 is supported by an annular member 39, and the annular member 39 is fixed to the inner wall portion of the main container 10 with bolts or the like.

In the electric element 2, when a magnetic field is formed by energizing the stator 23, an attractive force or a repulsive force is generated between the rotor 22 and the stator 23, and the drive shaft 20 rotates in a predetermined direction together with the rotor 22. .. By the rotation of the drive shaft 20, refueling is performed as described above and the compression element 3 is driven.

Next, the compression element 3 will be described. The compression element 3 has a fixed scroll 50 and an orbiting scroll 60. The fixed scroll 50 and the orbiting scroll 60 are housed in the space between the first end blocking portion 11 and the bearing portion 21 in the closed container 1.

The fixed scroll 50 has a substantially disk-shaped fixed substrate (first substrate) 51, and the orbiting scroll 60 has a substantially disk-shaped orbiting substrate (second substrate) 61. The fixed substrate 51 and the swivel substrate 61 face each other.

A cylindrical outer peripheral wall 52 is provided upright on the surface of the fixed substrate 51 facing the swivel substrate 61 (the surface on the second end side or the first surface) so as to surround the outer peripheral portion. Further, a spiral-shaped fixed partition wall (first partition wall) 53 is erected inside the outer peripheral wall 52. The tip end surface of the outer peripheral wall 52 is in contact with the tip end surface of the tubular wall 29 of the bearing portion 21 so as to face it, and is fixed to the bearing portion 21 with a bolt or the like. In this state, a space is formed between the bearing portion 21 and the fixed scroll 50. The orbiting scroll 60 is arranged in this space.

The orbiting scroll 60 includes an orbiting base plate 61, a shaft support portion 62, and an orbiting partition wall (second partition wall) 63. The shaft support portion 62 has a recess 65 and a bearing 66 such as a radial ball bearing. The recessed portion 65 is formed in the central portion of the surface (first end side surface or first surface) of the swivel substrate 61 facing the fixed substrate 51. The bearing 66 is provided in the recess 65. The shaft support portion 62 rotatably supports the eccentric shaft 26 of the drive shaft 20 with a bearing 66. The orbiting partition wall 63 is erected on the surface of the orbiting base plate 61 facing the fixed base plate 51 so as to mesh with the fixed partition wall 53 of the fixed scroll 50. The space between the fixed scroll 50 and the orbiting scroll 60 forms the compression chamber 70.

When the main shaft 25 rotates about the axis A, the orbiting scroll 60 orbits (revolves) along with the eccentric shaft 26 along a circular orbit (revolution orbit) about the axis A. Then, when the orbiting scroll 60 orbits, the refrigerant in the compression chamber 70 is compressed. A rotation restraint member 67 such as an Oldham ring is provided between the bearing portion 21 and the orbiting scroll 60 so that the orbiting scroll 60 does not rotate during orbiting.

On the other hand, a suction passage 71 is provided between the first end blocking portion 11 and the fixed substrate 51. More specifically, the suction passage 71 is provided in a region from the central portion (the portion intersecting the axis A) of the first end blocking portion 11 to the vicinity of the suction port 13. The inlet of the suction passage 71 communicates with the suction port 13 of the closed container 1, and the outlet thereof extends from a through hole (not shown) formed in the fixed substrate 51 to the compression chamber 70 (a low-pressure chamber in the compression chamber 70). It is in communication.

In the fixed substrate 51, a discharge chamber 73 is provided on a surface (a surface on the first end side or a second surface) opposite to the first surface facing the swivel substrate 61. The discharge chamber 73 is formed inside the cover 72 by covering a part of the second surface with a plate-shaped cover 72. The discharge chamber 73 communicates with the compression chamber 70 (a high-pressure chamber in the compression chamber 70) through a discharge hole 74 formed through the central portion of the fixed substrate 51. A reed valve 75 that closes the discharge hole 74 is provided in the discharge chamber 73. The reed valve 75 is formed so as to open when the pressure inside the compression chamber 70 reaches a predetermined pressure or higher. The discharge chamber 73 projects into the suction passage 71. With this structure, the size of the compressor 100 in the direction along the axis A is reduced.

The discharge chamber 73 also communicates with a space formed between the first end blocking portion 11 and the fixed scroll 50. Further, this space communicates with the discharge port 14 of the closed container 1 through a gap between the main container 10 and the fixed scroll 50 and a gap between the main container 10 and the bearing portion 21. Therefore, when the electric element 2 is driven, the refrigerant gas is taken in from the suction port 13 (see arrow AR1), guided through the suction passage 71, and compressed in the compression chamber 70. The high-pressure refrigerant gas is discharged from the discharge hole 74 into the discharge chamber 73, and is discharged to the outside from the discharge port 14 through the space inside the closed container 1 (see arrow AR2).

Next, a drive circuit for driving the electric element 2 will be described.

A casing 80 is provided on the first end side (outside) of the first end closing portion 11. In detail, a space is formed between the first end blocking portion 11 and the casing 80. In this space, a circuit board 81 on which the drive circuit is mounted is housed and attached. This drive circuit includes an IPM (Intelligent Power Module) having a switching element. Since the heat generation density of the IPM is high, the IPM can be regarded as the heating element 82.

On the other hand, in the first end closing portion 11, a plurality of fins are provided on the wall surface (the surface facing the cover 72) on the second end side of the wall portion forming the suction passage 71 to form the air cooling portion 83. .. Then, the heating element 82 is in thermal contact with a position corresponding to the air cooling portion 83 on the wall surface of the wall portion of the first end blocking portion 11 on the first end side (the surface opposite to the surface facing the cover 72 ). It is provided. Therefore, the heating element 82 is cooled by the relatively low temperature refrigerant gas passing through the suction passage 71.

A through hole 84 is formed in the first end blocking portion 11 in the vicinity of the end portion on the side opposite to the suction port 13. The sealed terminal 85 attached to the circuit board 81 seals the through hole 84 and is fitted to the first end blocking portion 11. The sealed terminal 85 has a conductive terminal 86 connected to the drive circuit. The conductive terminal 86 is electrically connected to a cluster terminal (not shown) included in the cluster block 87 arranged on the second end side (inner side) of the first end blocking portion 11. The cluster terminal is connected to the power supply line 88 that communicates with the stator 23 of the electric element 2.

Next, the back pressure supply passage (communication passage) 91 provided for setting the pressure of the back pressure chamber 90 to an appropriate value will be described. On the side of the orbiting scroll 60 opposite to the compression chamber 70, a back pressure chamber 90 is formed as a space surrounded by the bearing portion 21 and the orbiting scroll 60. By appropriately maintaining the pressure of the back pressure chamber 90 during the operation of the compressor 100, the orbiting scroll 60 can be brought into contact with the fixed scroll 50 at an appropriate pressure. As a result, the operating efficiency of the compressor 100 can be improved.

FIG. 2 is a cross-sectional view showing a part of the compressor 100 in an enlarged manner. The compressor 100 is provided with a back pressure supply passage 91 for adjusting the pressure of the back pressure chamber 90 to an appropriate value. The inlet 92 of the back pressure supply passage 91 is opened toward the compression chamber 70 at the fixed scroll 50, and the outlet 93 is opened toward the back pressure chamber 90 at the bearing portion 21.

More specifically, the inlet 92 is open at the tip end surface of the fixed partition wall 53 of the fixed scroll 50. More specifically, the inlet 92 is the front end surface of the wall portion of the fixed partition wall 53 that defines the high pressure chamber that communicates with the discharge hole 74 in the compression chamber 70, and faces the first surface of the swirl base plate 61. It has an opening on the surface.

The back pressure supply passage 91 has a first communication passage 91a, a second communication passage 91b, a third communication passage 91c, a fourth communication passage 91d, and a fifth communication passage 91e.

The first communication passage 91 a extends from the inlet 92 toward the first end side inside the fixed partition wall 53 and reaches the fixed substrate 51. The second communication passage 91b extends from the downstream end of the first communication passage 91a to the outer peripheral portion inside the fixed substrate 51. The third communication passage 91c extends from the downstream end of the second communication passage 91b to the wall surface on the second end side through the outer peripheral wall 52 of the fixed scroll 50.

The fourth communication passage 91d extends from the wall surface on the first end side, which is in contact with the outer peripheral wall 52 of the fixed scroll 50, to the second end side in the tubular wall 29 of the bearing portion 21. The upstream end of the fourth communication passage 91d communicates with the downstream end of the third communication passage 91c. The fifth communication passage 91e extends from the downstream end of the fourth communication passage 91d toward the first end side so as to approach the axis A. The downstream end of the fifth communication passage 91e serves as the outlet 93.

In the compressor 100 configured as described above, when electric power is supplied to the stator 23 and the electric element 2 is rotationally driven, the orbiting scroll 60 revolves around the axis A along with the rotation of the drive shaft 20. To do. Then, the refrigerant gas sucked from the suction port 13 and taken into the compression chamber 70 is compressed. The compressed refrigerant gas is discharged from the discharge hole 74 into the discharge chamber 73, passes through the internal space of the closed container 1, and is discharged to the outside through the discharge port 14.

During this time, when the internal pressure of the compression chamber 70 is less than the predetermined value, the fixed scroll 50 and the orbiting scroll 60 maintain an appropriate distance, and the inlet 92 of the back pressure supply passage 91 is on the first end side of the orbiting base plate 61. It is closed by the main surface (first surface). On the other hand, when the internal pressure of the compression chamber 70 becomes a predetermined value or more, the orbiting scroll 60 slightly moves (separates) from the fixed scroll 50 to the second end side. Then, the inlet 92 is opened, and a part of the high-pressure refrigerant gas in the compression chamber 70 is supplied to the back pressure chamber 90 through the back pressure supply passage 91. As a result, the internal pressure of the back pressure chamber 90 increases, the orbiting scroll 60 is pushed back toward the first end side again, and the fixed scroll 50 and the orbiting scroll 60 are maintained at an appropriate distance.

In the compressor 100, the orbiting scroll 60 does not have the back pressure supply passage 91. Therefore, even when the orbiting scroll 60 is plated with a hard material to prevent seizure, the back pressure supply passage 91 can be formed relatively easily.

The configurations of the compressor and the back pressure supply passage are not limited to those shown in FIGS. 1 and 2. Next, another configuration (modification) of the compressor and the back pressure supply passage will be described. FIG. 3 is a cross-sectional view showing a configuration of a scroll compressor 200 according to a modification of the embodiment of the present disclosure, and FIG. 4 is a cross-sectional view showing a part of the compressor 200 in an enlarged manner. 3 and 4, components similar to those of the compressor 100 are designated by the same reference numerals, and description thereof may be omitted.

The bearing portion 121 of the compressor 200 has a substantially disk-shaped partition wall 128 and a cylindrical wall 129. Similar to the partition wall 28 of the compressor 100, the partition wall 128 separates the internal space of the main container 10 into two parts (first end side and second end side) along the axial center A direction. The cylindrical wall 129 extends from the outer peripheral portion of the partition wall 128 toward the first end. However, the tubular wall 129 is longer than the tubular wall 29 of the compressor 100 in the axial center A direction. The tip end surface of the cylindrical wall 129 on the first end side is in contact with the outer peripheral portion of the wall surface on the second end side of the first end closing portion 111.

The fixed scroll 150 of the compressor 200 has a smaller radial dimension than the fixed scroll 50 of the compressor 100, and is provided so as to be fitted into the cylindrical wall 129 of the bearing portion 121.

A suction passage 171 is formed between the central portion of the first end blocking portion 111 and the fixed base plate 151 of the fixed scroll 150. Further, in the fixed substrate 151, a discharge chamber 173 is provided on a surface (a surface on the first end side or a second surface) opposite to the first surface facing the swivel substrate 61. The discharge chamber 173 is formed inside the cover 172 by covering a part of the second surface with a plate-shaped cover 172. The discharge chamber 173 projects into the suction passage 171.

Further, in the first end blocking portion 111, a plurality of fins are provided on the wall surface (the surface facing the cover 172) on the second end side of the wall portion forming the suction passage 171 to form the air cooling portion 183. .. On the other hand, the circuit board 181 is housed in the space between the first end blocking portion 111 and the casing 80. A heating element 182 is provided on the circuit board 181 at a position corresponding to the air cooling unit 183.

The back pressure supply passage 191 of the compressor 200 penetrates the fixed base plate 151 of the fixed scroll 150, extends toward the outer peripheral side of the first end blocking portion 111, and passes through the tubular wall 129 of the bearing portion 121. It has been extended. The back pressure supply passage 191 will be described more specifically with reference to FIG.

The inlet 192 of the back pressure supply passage 191 is open at the front end surface of the fixed partition wall 153 of the fixed scroll 150. That is, similarly to the compressor 100, the inlet 192 is a tip end surface of a wall portion of the fixed partition wall 153 that defines a high pressure chamber that communicates with the discharge hole 174 (see FIG. 3) in the compression chamber 170. The opening is formed in the surface of the substrate 61 facing the first surface.

The back pressure supply passage 191 includes a first communication passage 191a, a second communication passage 191b, a third communication passage 191d, a fourth communication passage 191e, a fifth communication passage 191f, and a sixth communication passage 191g. Have The first communication passage 191 a extends from the inlet 192 toward the first end side inside the fixed partition wall 153 and reaches the fixed substrate 151. The second communication passage 191b penetrates from the downstream end of the first communication passage 191a toward the first end side while going outward in the fixed substrate 151. A recess 191c is formed on the wall surface (the surface facing the fixed substrate 151) on the second end side of the first end blocking portion 111. The downstream end of the second communication passage 191b opens toward the recess 191c.

The third communication passage 191d and the subsequent fourth communication passage 191e are provided in the first end blocking portion 111. The upstream end of the third communication passage 191d opens into the recess 191c. The third communication passage 191d extends outward from the recess 191c toward the first end in the first end blocking portion 111, and communicates with the upstream end of the fourth communication passage 191e. The fourth communication passage 191e extends parallel to the axis A. The downstream end of the fourth communication passage 191e is a wall surface on the second end side of the first end blocking portion 111, and is open on a surface that abuts the cylindrical wall 129 of the bearing portion 121.

In the tubular wall 129, the fifth communication passage 191f extends in parallel to the axis A from the tip end surface on the first end side that abuts the first end blocking portion 111 to the second end side. Therefore, the upstream end of the fifth communication passage 191f communicates with the downstream end of the fourth communication passage 191e. The sixth communication passage 191g extends from the downstream end of the fifth communication passage 191f toward the first end side so as to approach the axis A. The downstream end of the sixth communication passage 191g serves as an outlet 193.

The compressor 200 operates similarly to the compressor 100. Then, when the internal pressure of the compression chamber 170 exceeds a predetermined value, the orbiting scroll 60 slightly moves (separates) from the fixed scroll 150 toward the second end side. Then, the inlet 192 is opened, and a part of the high-pressure refrigerant gas in the compression chamber 170 is supplied to the back pressure chamber 190 through the back pressure supply passage 191. As a result, the internal pressure of the back pressure chamber 190 is increased, the orbiting scroll 60 is pushed back to the first end again, and the fixed scroll 150 and the orbiting scroll 60 are maintained at an appropriate distance.

As described above, in the compressors 100 and 200, the communication passage having the inlet opening to the compression chamber by the fixed scroll and the outlet opening to the back pressure chamber at the bearing portion is provided. With this configuration, even when the orbiting scroll is plated with a hard material, it is possible to apply an appropriate back pressure to the orbiting scroll without the need for post-processing for burr generation or blockage of the opening. it can. That is, the orbiting scroll may have a plating layer made of a hard material on the surface. The plated layer may be harder than the orbiting scroll body. For example, when the orbiting scroll body is made of aluminum, the plating layer may be formed by an electrodeposition dispersion plating method based on a nickel sulfamate bath containing phosphorus.

In the above-described embodiment and its modification, the compressor in which the electric element, the compression element, and the drive circuit are arranged in this order from the second end side (right side) in the axial center A direction has been described, but the drive circuit, the electric element, and It is also applicable to a compressor in which the compression elements are arranged in order and the discharge port and the suction port are reversed.

Further, although the compressor including the electric element and the drive circuit has been described in the above-described embodiment and its modification, the present invention is also applicable to a compressor not including them. As an example of a compressor that does not have an electric element and a drive circuit, there is a configuration in which a pulley or a gear that is mechanically connected to an engine is attached to the drive shaft instead of the electric element.

As described above, the scroll compressor according to the present disclosure has the fixed scroll, the orbiting scroll, the drive shaft, the bearing portion, and the communication passage. The fixed scroll has a first surface provided with a spiral first partition wall and a second surface opposite to the first surface. The orbiting scroll has a spiral second partition wall that meshes with the first partition wall to form a compression chamber, and faces the first surface of the fixed scroll. The drive shaft orbits the orbiting scroll. The bearing portion supports this drive shaft. A back pressure chamber surrounded by the orbiting scroll and the bearing portion is provided on the opposite side of the orbiting scroll from the compression chamber. The inlet of the communication passage is opened toward the compression chamber by the fixed scroll, and the outlet is opened toward the back pressure chamber at the bearing.

Further, the fixed scroll may further include a first substrate on which the first partition wall is erected, and the orbiting scroll may further include a second substrate on which the second partition wall is erected. Further, the inlet of the communication passage may be formed at a portion of the end of the first partition wall of the fixed scroll facing the second substrate of the orbiting scroll.

Further, the fixed scroll may further include a first substrate on which the first partition wall is erected, and an outer peripheral wall erected on an outer peripheral portion of the first substrate. On the other hand, the bearing portion may include a shaft support portion that supports the drive shaft, and a cylindrical wall that surrounds the shaft support portion and has a cylindrical shape that abuts against an end portion of the outer peripheral wall of the fixed scroll. The communication passage may be provided through the first substrate and the outer peripheral wall of the fixed scroll and further through the tubular wall of the bearing portion.

Furthermore, the scroll compressor may further include a closed container. This closed container includes a main container and a closing part. The main container has a cylindrical shape and houses the fixed scroll, the orbiting scroll, and the bearing portion. An opening is provided at one end of the main container. The closing portion closes the opening of the main container so as to cover the second surface of the fixed scroll. The fixed scroll may further include a first substrate on which the first partition wall is erected. The bearing part has a shaft support part and a cylindrical wall. The shaft support supports the drive shaft. The cylindrical wall has a cylindrical shape so as to surround the shaft supporting portion, and has an end portion that is fitted onto the fixed scroll and abuts on the closed portion. Further, the communication passage may be provided so as to pass through the first substrate of the fixed scroll, pass through the closed portion, and further pass through the tubular wall of the bearing portion.

While the present disclosure has been fully described in connection with the embodiments with reference to the accompanying drawings, various variations and modifications will be apparent to those skilled in the art. It is to be understood that such variations and modifications are included within the scope of the present disclosure as defined by the appended claims.

INDUSTRIAL APPLICABILITY The present invention can be applied to, for example, a scroll compressor used for an air conditioner of a vehicle such as an automobile.

1 Airtight Container 2 Electric Element 3 Compression Element 10 Main Container 11, 111 First End Closure (Closing)
12 2nd end block part 13 Suction port 14 Discharge port 20 Drive shaft 21,121 Bearing part 22 Rotor 23 Stator 25 Main shaft 26 Eccentric shaft 28,128 Partition wall 29,129 Cylindrical wall 30 Main shaft support part (shaft support part)
31, 33, 66 Bearing 32 Sub-shaft support 35 Pump 36 Suction passage 37 Oil supply passage 39 Annular member 50, 150 Fixed scroll 51, 151 Fixed substrate (first substrate)
52 Peripheral walls 53, 153 Fixed partition wall (first partition wall)
60 orbiting scroll 61 orbiting substrate (second substrate)
62 Shaft support 63 Revolving partition wall (second partition wall)
65 recessed part 67 rotation restraint member 70,170 compression chamber 71,171 suction passage 72,172 cover 73,173 discharge chamber 74,174 discharge hole 75 reed valve 80 casing 81,181 circuit board 82,182 heating element 83,183 air cooling part 84 Through Hole 85 Sealed Terminal 86 Conductive Terminal 87 Cluster Block 88 Power Supply Line 90, 190 Back Pressure Chamber 91, 191 Back Pressure Supply Path (Communication Path)
91a, 191a First communication passage 91b, 191b Second communication passage 91c, 191d Third communication passage 91d, 191e Fourth communication passage 91e, 191f Fifth communication passage 92, 192 Inlet 93, 193 Outlet 100, 200 Scroll compressor (Compressor)
191c recess 191g sixth communication passage

Claims (2)

A fixed scroll having a first surface provided with a spiral first partition wall, and a second surface opposite to the first surface;
An orbiting scroll that has a spiral second partition wall that meshes with the first partition wall to form a compression chamber, and that faces the first surface of the fixed scroll;
A drive shaft for orbiting the orbiting scroll,
A bearing portion that supports the drive shaft,
A back pressure chamber surrounded by the orbiting scroll and the bearing portion is provided on the opposite side of the orbiting scroll from the compression chamber,
A communication passage connecting the entrance and the exit is provided,
The inlet is opened toward the compression chamber by the fixed scroll,
The outlet is opened toward the back pressure chamber at the bearing portion ,
A main container having a cylindrical shape to accommodate the fixed scroll, the orbiting scroll, and the bearing portion, and an opening provided at one end,
Further comprising a closed container having a closing portion that closes the opening of the main container so as to cover the second surface of the fixed scroll,
The fixed scroll further includes a first substrate on which the first partition wall is erected,
The bearing portion is
A shaft support portion that supports the drive shaft,
A cylindrical wall having a cylindrical shape surrounding the shaft support portion and having an end portion that is externally fitted to the fixed scroll and directly abuts the closed portion,
The communication passage is provided so as to pass through the first substrate of the fixed scroll, pass through the closing portion, and further directly pass through the tubular wall of the bearing portion from the closing portion .
Scroll compressor. The fixed scroll further includes a first substrate on which the first partition wall is erected,
The orbiting scroll further includes a second substrate on which the second partition wall is erected,
The inlet is provided at an end of the first partition wall of the fixed scroll at a portion of the orbiting scroll that faces the second substrate.
The scroll compressor according to claim 1.

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