JP2023078810A - scroll compressor - Google Patents

Abstract

To provide a scroll compressor capable of improving operation efficiency.SOLUTION: A scroll compressor 10 includes: a fixed scroll 21; a movable scroll 20 disposed turnably to the fixed scroll 21; a compression space 43 formed as a clearance between the fixed scroll 21 and the movable scroll 20; a shaft 18 for applying driving force to the movable scroll 20; and a casing 11. A bearing 50 is disposed between the casing 11 and an end portion of the shaft 18. The bearing 50 has an inner ring portion 501 and an outer ring portion 502. On an inner surface of the casing 11, a bearing fixing portion 51 to which an outer peripheral portion of the outer ring portion 502 is fitted, is formed. An opening portion 52 is formed by opening a part of the bearing fixing portion 51.SELECTED DRAWING: Figure 4

Description

The present invention relates to scroll compressors.

In a general scroll compressor, a fixed scroll is fixed to a scroll body, and a movable scroll is rotatably combined with the fixed scroll. When the scroll compressor is operated, the orbiting scroll orbits around the orbital center as the rotation axis, and the fluid introduced from the periphery of the scroll compressor between the fixed scroll and the orbiting scroll is compressed between the two. while moving toward the center. The fluid reaching the center is supplied outside the system in a compressed state. A scroll compressor having such a configuration is described in Patent Document 1, for example.

Japanese Patent No. 4635660

However, the scroll compressor having the general configuration described above has room for improvement from the viewpoint of operating efficiency.

Specifically, in the scroll compressor described above, the movable scroll is turned by the rotational force of the shaft. Both ends of the shaft are supported by the casing of the scroll compressor via bearings. Here, in order to rotate the bearings well, it is necessary to supply lubricating oil to the bearings, but the inside of the casing is a closed space. Therefore, it is not easy to sufficiently supply oil to the bearings, and if the supply of oil to the bearings is insufficient, there is a problem that the rotational resistance of the bearings increases and the energy consumed by the scroll compressor increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a scroll compressor capable of enhancing operating efficiency.

A scroll compressor according to the present invention includes a fixed scroll, an orbiting scroll arranged to be orbitable with respect to the fixed scroll, a compression space formed as a gap between the fixed scroll and the orbiting scroll, and the orbiting scroll. a shaft that provides driving force and a casing, a bearing interposed between the casing and an end of the shaft, the bearing having an inner ring portion and an outer ring portion; The inner surface of the casing is formed with a bearing fixing portion in which the outer peripheral portion of the outer ring portion is fitted, and the opening is formed by opening a part of the bearing fixing portion.

Moreover, in the scroll compressor of the present invention, the opening is formed in a side portion of the bearing fixing portion.

Further, in the scroll compressor of the present invention, a recessed portion is formed by recessing a portion of the inner surface of the casing where the opening is formed.

Further, in the scroll compressor of the present invention, the concave portion is formed continuously from the inner side of the bearing fixing portion to the outer side of the bearing fixing portion.

Further, in the scroll compressor of the present invention, the bearing fixing portion has an inner portion and an extension portion, the inner portion is formed inside the bearing fixing portion, and the extension portion and extend to the outside of the bearing fixing portion via the opening.

Further, in the scroll compressor of the present invention, the inner portion has a substantially circular shape, the outer diameter of the inner portion is larger than the outer diameter of the inner ring portion of the bearing, and the outer diameter of the outer ring portion of the bearing is larger than that of the bearing. It is characterized by being smaller than the inner diameter.

Further, in the scroll compressor of the present invention, an intake port for taking refrigerant into the casing is formed above the bearing fixing portion.

Further, in the scroll compressor of the present invention, an inner hole is formed inside the shaft, one end of the inner hole faces the inside of the bearing fixing portion, and the other end of the inner hole faces the bearing fixing portion. It is characterized in that it is arranged in the vicinity of a turning mechanism that drives the movable scroll.

A scroll compressor according to the present invention includes a fixed scroll, an orbiting scroll arranged to be orbitable with respect to the fixed scroll, a compression space formed as a gap between the fixed scroll and the orbiting scroll, and the orbiting scroll. a shaft that provides driving force and a casing, a bearing interposed between the casing and an end of the shaft, the bearing having an inner ring portion and an outer ring portion; The inner surface of the casing is formed with a bearing fixing portion in which the outer peripheral portion of the outer ring portion is fitted, and the opening is formed by opening a part of the bearing fixing portion. According to the scroll compressor of the present invention, it is possible to provide a scroll compressor with improved operating efficiency. Specifically, by forming an opening in the bearing fixing portion, the lubricating oil enters the inside of the bearing fixing portion via the opening. Therefore, the lubricating oil that has entered is well supplied to the bearings, and the shaft can be well rotated through the bearings. By doing so, it is possible to reduce the energy consumed when the scroll compressor is operated.

Moreover, in the scroll compressor of the present invention, the opening is formed in a side portion of the bearing fixing portion. According to the scroll compressor of the present invention, since the opening is formed in the side portion of the bearing fixing portion, an appropriate amount of lubricating oil can enter through the opening.

Further, in the scroll compressor of the present invention, a recessed portion is formed by recessing a portion of the inner surface of the casing where the opening is formed. According to the scroll compressor of the present invention, by forming the concave portion corresponding to the portion where the opening portion is formed, it becomes easier for the lubricating oil to enter through the concave portion.

Further, in the scroll compressor of the present invention, the concave portion is formed continuously from the inner side of the bearing fixing portion to the outer side of the bearing fixing portion. According to the scroll compressor of the present invention, lubricating oil can more easily enter the bearing fixing portion via the recessed portion.

Further, in the scroll compressor of the present invention, the bearing fixing portion has an inner portion and an extension portion, the inner portion is formed inside the bearing fixing portion, and the extension portion and extend to the outside of the bearing fixing portion via the opening. According to the scroll compressor of the present invention, lubricating oil can be effectively supplied to the bearing via the inner portion and the extension portion.

Further, in the scroll compressor of the present invention, the inner portion has a substantially circular shape, the outer diameter of the inner portion is larger than the outer diameter of the inner ring portion of the bearing, and the outer diameter of the outer ring portion of the bearing is larger than that of the bearing. It is characterized by being smaller than the inner diameter. According to the scroll compressor of the present invention, lubricating oil can be well supplied between the outer ring portion and the inner ring portion of the bearing through the inner portion of the concave portion.

Further, in the scroll compressor of the present invention, an intake port for taking refrigerant into the casing is formed above the bearing fixing portion. According to the scroll compressor of the present invention, since the intake port for taking the refrigerant into the casing is formed above the bearing fixing portion, the refrigerant containing the lubricating oil can be more preferably It can be supplied for bearings.

Further, in the scroll compressor of the present invention, an inner hole is formed inside the shaft, one end of the inner hole faces the inside of the bearing fixing portion, and the other end of the inner hole faces the bearing fixing portion. It is characterized in that it is arranged in the vicinity of a turning mechanism that drives the movable scroll. ADVANTAGE OF THE INVENTION According to the scroll compressor of this invention, the refrigerant|coolant containing lubricating oil can be supplied to a turning mechanism via a movable scroll.

It is a perspective view showing a scroll compressor concerning an embodiment of the present invention. It is a sectional view showing a scroll compressor concerning an embodiment of the present invention. It is an exploded perspective view showing a scroll compressor concerning an embodiment of the present invention. 1 is an enlarged exploded perspective view of a scroll compressor according to an embodiment of the present invention; FIG. 1 is an enlarged exploded perspective view showing a scroll compressor according to an embodiment of the present invention; FIG. It is a perspective view showing a shaft of a scroll compressor concerning an embodiment of the present invention.

Hereinafter, the scroll compressor 10 of this embodiment will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals, and overlapping descriptions are omitted. In the following description, up, down, front, back, left, and right directions are used as appropriate, but the front indicates the upstream side of the fluid flow inside the scroll compressor 10, the rear indicates the opposite side to the front, and the left and right indicate scroll compression. Left and right are shown when the aircraft 10 is viewed from the front.

A configuration of a scroll compressor 10 according to the present embodiment will be described with reference to FIG. FIG. 1 is a perspective view showing the entire scroll compressor 10. As shown in FIG.

In the scroll compressor 10 , each member functioning as the scroll compressor 10 is housed inside a casing 11 . An intake port 13 is formed at the front upper end of the casing 11 , and an exhaust port 14 is formed at the rear upper end of the casing 11 . The intake port 13 is provided inside the casing 11 with refrigerant before compression. The compressed refrigerant is discharged outside the casing 11 through the exhaust port 14 .

The casing 11 has a casing portion 111, a casing portion 112, a casing portion 113, and a casing portion 114 from the front. The casing part 111 constitutes the front end part of the casing 11 and is a substantially cylindrical member that opens rearward. The casing part 112 is a substantially cylindrical member, in which a motor 16, which will be described later, is housed. The casing part 113 is a substantially cylindrical member, and a part of the scroll mechanism is formed inside it. The casing part 114 is a substantially lid-shaped member that constitutes the rear end of the casing 11 . The casing portions 111 to 114 are made of metal such as aluminum. Casing part 111 to casing part 114 are fastened together by a fastening mechanism not shown here.

The function of the scroll compressor 10 is to compress the refrigerant (fluid) introduced from the inlet 13 by orbiting the movable scroll 20, which will be described later, with the driving force of the built-in motor 16, and exhaust the compressed refrigerant. It is to discharge to the outside from the mouth 14. - 特許庁The scroll compressor 10 is connected to a condenser, expansion means, and evaporator (not shown) through refrigerant pipes to form a vapor compression refrigeration cycle. This vapor compression refrigeration cycle is used, for example, as an air conditioner for cooling or heating the interior of a vehicle.

As the refrigerant introduced into the scroll compressor 10, for example, a mixed fluid of refrigerant and refrigerating machine oil is used. By doing so, the refrigerating machine oil, which is a lubricating oil, is spread over each component of the scroll compressor 10 to reduce the friction of each component, thereby improving the energy efficiency of the scroll compressor 10. can.

FIG. 2 is a cross-sectional view showing the scroll compressor 10, corresponding to the AA section line in FIG. In FIG. 2 , arrows indicate the flow of refrigerant inside the scroll compressor 10 .

Inside the casing 11, an inverter board 15, a motor 16, a turning mechanism 23, a movable scroll 20 and a fixed scroll 21 are arranged from the front side. A discharge port 24 is formed by passing through substantially the central portion of the fixed scroll 21 . The discharge port 24 is covered with a valve body 25 from behind. When the refrigerant is compressed between the movable scroll 20 and the fixed scroll 21, the pressure causes the valve element 25 to open.

An inverter board 15 is formed in a storage space 33 formed in the front end portion of the casing 11 . The inverter board 15 has an inverter formed of conductive paths and circuit elements on the surface of a substantially circular board. The inverter includes, for example, a converter circuit that converts input commercial AC power into DC power, and an inverter circuit that converts the DC power into AC power of a predetermined frequency. The inverter board 15 supplies AC power of a predetermined frequency to the motor 16 described above.

A partition wall 32 is formed on the rear side of the storage space 33 . An introduction space 30 is formed on the front side of the partition wall 32 .

An inlet 13 is formed by partially opening the upper portion of the casing 11 and protruding the opening in a cylindrical shape to the side.

A motor 16 having a substantially cylindrical outer shape is housed inside the casing portion 112 . A gap is formed between the inner side surface of the casing portion 112 and the outer side surface of the motor 16 to allow the circulation of the coolant.

The shaft 18 is a substantially cylindrical steel rod, and its middle portion is inserted inside the motor 16 . The motor 16 comprises a stator 37 fixed to the inner wall of the casing portion 112 and a rotor 36 connected to the shaft 18 so as not to rotate relative to it. The driving force of the motor 16 causes the shaft 18 to rotate. The front end of shaft 18 is rotatably supported by bearings 50 . A rear end portion of the shaft 18 is connected to the orbiting scroll 20 via a bearing 49 . Further, the rear end portion of shaft 18 is connected to inner housing 19 via bearing 48 .

The inner housing 19 is arranged on the front side of the motor 16 . By partially opening the internal housing 19 , a communication port 28 is formed to allow communication between the front side space and the rear side space of the internal housing 19 and to circulate the coolant.

The turning mechanism 23 is arranged on the front side of the internal housing 19 . The turning mechanism 23 is a mechanism for turning the movable scroll 20 .

The movable scroll 20 is arranged on the rear side of the internal housing 19 and is turned by the turning mechanism 23 described above.

The fixed scroll 21 is fixed to the inner wall of the casing portion 113 . As the orbiting scroll 20 revolves with respect to the fixed scroll 21 , the refrigerant is compressed in the compression space 43 formed between the orbiting scroll 20 and the fixed scroll 21 . The compressed refrigerant is discharged rearward from the discharge port 24 described above.

The casing part 114 covers the fixed scroll 21 from behind. Casing portion 114 is also referred to as a rear case. The casing part 114 is fastened to the casing part 112 together with the casing part 113 forming the fixed scroll 21 via fastening means such as bolts. An exhaust port 14 is formed in the upper portion of the casing portion 114 to communicate the internal space of the casing 11 with the outside. The exhaust port 14 protrudes in a substantially cylindrical shape. Compressed refrigerant compressed by orbiting the movable scroll 20 with respect to the fixed scroll 21 is discharged to the outside through the exhaust port 14 . The refrigerant discharged from the exhaust port 14 is sent to a condenser not shown here.

The operation of the scroll compressor 10 will be explained. First, an inverter circuit incorporated in the inverter board 15 converts power supplied from an external power supply into AC power of a predetermined frequency. The motor 16 is supplied with this AC power and rotates in a predetermined direction at a predetermined speed. Motor 16 rotates shaft 18 .

Refrigerant introduced into the casing 11 from the rear portion of the intake port 13 is introduced into the introduction space 30, advances rearward, and passes through the gap between the outer side surface of the motor 16 and the inner side surface of the casing 11. , to the circulation space 35 formed behind the motor 16 .

The refrigerant introduced into the circulation space 35 is introduced into the compression space 43 via the communication port 28 . Thereafter, the orbiting mechanism 23 converts the rotational motion of the shaft 18 into orbiting motion, causing the orbiting scroll 20 to orbit. After that, the sufficiently compressed refrigerant moves from the discharge port 24 with the valve body 25 opened to the discharge space 34 and is discharged to the outside through the discharge port 14 .

FIG. 3 is an exploded perspective view showing the scroll compressor 10. FIG. Here, casing section 112, casing section 113, casing section 114, and casing section 111 are shown separated from each other.

The bearing fixing portion 51 is a part of the central portion of the inner main surface of the casing portion 111 that partially protrudes rearward in a wall shape. A bearing 50 is fitted in the bearing fixing portion 51 .

FIG. 4 is an exploded perspective view showing the casing part 111 and the bearing 50 separated from each other.

The bearing 50 has an inner ring portion 501 , an outer ring portion 502 and rolling elements 503 . The inner ring portion 501 is a substantially annular member, and the aforementioned shaft 18 is fitted therein. The inner ring portion 501 and the aforementioned shaft 18 are connected so as not to rotate relative to each other. The outer ring portion 502 is a substantially annular member and is fitted into the bearing fixing portion 51 so as not to rotate relative to each other. The outer diameter of the outer ring portion 502 is substantially the same as the inner diameter of the bearing fixing portion 51 . The rolling elements 503 are, for example, steel balls, and are arranged between the inner ring portion 501 and the outer ring portion 502 at substantially equal intervals.

When the scroll compressor 10 is used, the inner ring portion 501 rotates at high speed together with the shaft 18 (not shown). The rolling element 503 rotates while revolving between the inner ring portion 501 and the outer ring portion 502 . Outer ring portion 502 does not rotate.

An intake port 13 is formed above the bearing fixing portion 51 to take the refrigerant into the casing 11 . With this configuration, the refrigerant taken in from the intake port 13 can be sprayed onto the bearing fixing portion 51 during operation of the scroll compressor 10 . Therefore, the lubricating oil contained in the coolant can be well supplied to the bearing 50 incorporated in the bearing fixing portion 51 .

FIG. 5 is an exploded perspective view showing only the bearing fixing portion 51 and the bearing 50 extracted.

As described above, the bearing fixing portion 51 is a wall-like portion projecting rearward from the main surface of the casing portion 111 . Furthermore, the bearing fixing portion 51 has a substantially annular shape as a whole, and an opening portion 52 is formed by partially removing the left end portion.

Since the openings 52 are formed, refrigerant containing lubricating oil enters the bearing 50 side through the openings 52 during operation of the scroll compressor 10 . Therefore, the operation of the bearing 50 can be made smooth, and wear of the bearing 50 can be suppressed.

In addition, since the opening 52 is formed at the side end of the bearing fixing portion 51 , the refrigerant is actively introduced and discharged via the opening 52 . Therefore, during operation of the scroll compressor 10, the friction of the bearing 50 can be reduced, and the bearing 50 can be effectively cooled.

The recessed portion 53 is a main surface of the casing portion 111 and is a portion formed by recessing a portion in which the opening portion 52 is formed. By forming the concave portion 53 , a gap is formed between the front surface of the bearing 50 and the main surface of the casing portion 111 .

The concave portion 53 has an inner portion 531 and an extension portion 532 . Inner portion 531 and extension 532 form a continuous concave region.

The inner portion 531 is formed in a circular or substantially circular shape inside the bearing fixing portion 51 . Here, the outer diameter of the inner ring portion 501 of the bearing 50 is L10, the inner diameter of the outer ring portion 502 is L11, and the outer diameter of the inner portion 531 is L12. In this case, L12 is larger than L10 and smaller than L11. In other words, the outer edge of the inner portion 531 is positioned between the outer edge of the inner ring portion 501 and the inner edge of the outer ring portion 502 . Therefore, lubricating oil can be well supplied between the inner ring portion 501 and the outer ring portion 502 via the inner portion 531, the rolling elements 503 can be rotated well, and the rotational resistance of the bearing 50 can be reduced.

The extending portion 532 is a recessed portion that is continuous with the inner portion 531 and extends to the outside of the bearing fixing portion 51 via the opening 52 of the bearing fixing portion 51 . The longitudinal width of the outer end of the extending portion 532 is longer than the longitudinal width of the opening 52 . By doing so, a large amount of coolant containing lubricating oil can be supplied to the inner portion 531 via the extended portion 532 .

Further, the front surface of the outer ring portion 502 is in contact with the outer peripheral flat portion 54 formed on the bearing fixing portion 51 . The outer peripheral flat portion 54 is a flat surface formed between the inner edge portion of the bearing fixing portion 51 and the outer edge portion of the inner portion 531 .

6 is a perspective view showing the shaft 18. FIG.

An inner hole portion 39 and an inner hole portion 40 are formed inside the shaft 18 .

The inner hole portion 39 is formed from the front end of the shaft 18, extends in the front-rear direction, and terminates near the rear end. The inner hole portion 39 is a substantially cylindrical hole portion. The front end of the inner hole portion 39 faces the inner portion 531 shown in FIG.

The inner hole portion 40 extends from near the rear end of the inner hole portion 39 to a side surface near the rear end of the shaft 18 . The inner hole portion 40 slopes radially outward toward the rear. The inner hole portion 40 is a substantially cylindrical hole portion. Two inner holes 40 are formed. The rear end of inner bore 40 is located between bearings 48 and 49 shown in FIG. Here, the inner holes 40 are arranged symmetrically with respect to the central axis of the shaft 18 .

A phenomenon in which a coolant containing lubricating oil flows through the shaft 18 will be described. Referring to FIG. 5 , coolant enters inside bearing fixing portion 51 via extension portion 532 and inner portion 531 . Part of the entering coolant enters the inner hole portion 39 shown in FIG. 6 from the front to the rear. The coolant that has reached the rear end of the inner hole portion 39 enters the inner hole portion 40 . The coolant then enters the space formed between the bearings 48 and 49 shown in FIG. The lubricating oil contained in the refrigerant is supplied to the bearings 48, 49 and the turning mechanism 23 to reduce the frictional resistance of these components.

The above-described embodiment can provide the following main effects.

With reference to FIG. 5 , by forming an opening 52 in the bearing fixing portion 51 , lubricating oil enters the bearing fixing portion 51 via the opening 52 . Therefore, the lubricating oil that has entered is well supplied to the bearings 50 , and the shaft 18 can be well rotated via the bearings 50 . By doing so, the energy consumed when the scroll compressor 10 is operated can be reduced.

With reference to FIG. 5 , an appropriate amount of lubricating oil can enter through opening 52 by forming opening 52 in the side portion of bearing fixing portion 51 .

Further, by forming the concave portion 53 corresponding to the portion where the opening portion 52 is formed, it becomes easier for the lubricating oil to enter through the concave portion 53 .

Furthermore, the lubricating oil can easily enter the bearing fixing portion 51 via the portion of the concave portion 53 that straddles the bearing fixing portion 51 .

Furthermore, lubricating oil can be effectively supplied to the bearing 50 via the extended portion 532 and the inner portion 531 of the concave portion 53 .

Furthermore, since the outer edge of the inner portion 531 is arranged between the inner ring portion 501 and the outer ring portion 502, lubricating oil can be well supplied between the outer ring portion 502 and the inner ring portion 501 of the bearing 50. can be done.

Referring to FIG. 4, an intake port 13 for taking the refrigerant into the casing 11 is formed above the bearing fixing portion 51, so that the refrigerant containing lubricating oil can be more preferably supplied to the bearing fixing portion 51 and the It can be supplied to bearing 50 .

Referring to FIG. 6, coolant containing lubricating oil can be supplied to swirl mechanism 23 via inner hole 39 and inner hole 40 formed inside shaft 18 .

Although the embodiments of the present invention have been described above, the present invention is not limited to these, and modifications can be made without departing from the gist of the present invention. Moreover, each form described above can be combined with each other.

10 Scroll Compressor 11 Casing 111 Casing Part 112 Casing Part 113 Casing Part 114 Casing Part 13 Inlet 14 Exhaust Port 15 Inverter Board 16 Motor 18 Shaft 19 Internal Housing 20 Orbiting Scroll 21 Fixed Scroll 23 Turning Mechanism 24 Discharge Port 25 Valve 28 Communication port 30 Introduction space 32 Partition wall 33 Storage space 34 Discharge space 35 Circulation space 36 Rotor 37 Stator 39 Inner hole 40 Inner hole 43 Compression space 48 Bearing 49 Bearing 50 Bearing 501 Inner ring 502 Outer ring 503 Rolling element 51 Bearing fixing portion 52 Opening 53 Concave portion 531 Inner portion 532 Extension portion 54 Outer peripheral flat portion

A scroll compressor according to the present invention includes a fixed scroll, an orbiting scroll arranged to be orbitable with respect to the fixed scroll, a compression space formed as a gap between the fixed scroll and the orbiting scroll, and the orbiting scroll. a shaft that provides driving force and a casing, a bearing interposed between the casing and an end of the shaft, the bearing having an inner ring portion and an outer ring portion; The inner surface of the casing is formed with a bearing fixing portion in which the outer peripheral portion of the outer ring portion is fitted, and an opening is formed by opening a part of the bearing fixing portion , the inner surface of the casing, A concave portion is formed by forming a concave portion in which the opening is formed, the concave portion having an inner portion and an extension portion, the inner portion being formed inside the bearing fixing portion. The extending portion is continuous with the inner portion and extends to the outside of the bearing fixing portion via the opening, and the width of the extending portion along the circumferential direction outside the bearing fixing portion is By forming the opening in the bearing fixing portion longer than the width of the opening along the direction, lubricating oil enters the inside of the bearing fixing portion via the opening. do.

A scroll compressor according to the present invention includes a fixed scroll, an orbiting scroll arranged to be orbitable with respect to the fixed scroll, a compression space formed as a gap between the fixed scroll and the orbiting scroll, and the orbiting scroll. a shaft that provides driving force and a casing, a bearing interposed between the casing and an end of the shaft, the bearing having an inner ring portion and an outer ring portion; The inner surface of the casing is formed with a bearing fixing portion in which the outer peripheral portion of the outer ring portion is fitted, and an opening is formed by opening a part of the bearing fixing portion , the inner surface of the casing, A concave portion is formed by forming a concave portion in which the opening is formed, the concave portion having an inner portion and an extension portion, the inner portion being formed inside the bearing fixing portion. The extending portion is continuous with the inner portion and extends to the outside of the bearing fixing portion via the opening, and the width of the extending portion along the circumferential direction outside the bearing fixing portion is By forming the opening in the bearing fixing portion longer than the width of the opening along the direction, lubricating oil enters the inside of the bearing fixing portion via the opening. do. According to the scroll compressor of the present invention, it is possible to provide a scroll compressor with improved operating efficiency. Specifically, by forming an opening in the bearing fixing portion, the lubricating oil enters the inside of the bearing fixing portion via the opening. Therefore, the lubricating oil that has entered is well supplied to the bearings, and the shaft can be well rotated through the bearings. By doing so, it is possible to reduce the energy consumed when the scroll compressor is operated.

Claims (8)

a fixed scroll, an orbiting scroll arranged to be orbitable with respect to the fixed scroll, a compression space formed as a gap between the fixed scroll and the orbiting scroll, a shaft for applying a driving force to the orbiting scroll, a casing and
A bearing is interposed between the casing and the end of the shaft,
The bearing has an inner ring portion and an outer ring portion,
A bearing fixing portion is formed on the inner surface of the casing, in which the outer peripheral portion of the outer ring portion is fitted,
A scroll compressor, wherein an opening is formed by opening a part of the bearing fixing portion. 2. The scroll compressor according to claim 1, wherein the opening is formed in a lateral portion of the bearing fixing portion. 3. The scroll compressor according to claim 1, wherein a recessed portion is formed by forming a recessed portion of the inner surface of the casing where the opening is formed. 4. The scroll compressor according to claim 3, wherein the concave portion is continuously formed from the inner side of the bearing fixing portion to the outer side of the bearing fixing portion. the bearing fixing portion has an inner portion and an extension portion;
The inner part is formed inside the bearing fixing part,
5. The scroll compressor according to claim 3, wherein the extending portion is continuous with the inner portion and extends to the outside of the bearing fixing portion via the opening. The inner portion has a substantially circular shape,
6. The scroll compressor according to claim 5, wherein the outer diameter of the inner portion is larger than the outer diameter of the inner ring portion of the bearing and smaller than the inner diameter of the outer ring portion of the bearing. 7. The scroll compressor according to any one of claims 1 to 6, wherein an intake port for taking refrigerant into the casing is formed above the bearing fixing portion. An inner hole is formed inside the shaft,
one end of the inner hole faces the inside of the bearing fixing portion,
8. The scroll compressor according to any one of claims 1 to 7, wherein the other end of the inner hole portion is arranged in the vicinity of a turning mechanism that drives the orbiting scroll.

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