JPH10318165A - Scroll compressor, and freezer-refrigerator and freezing and air-conditioning unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable scroll compressor which can exhibit high lubricity even through alternate coolant by efficiently supplying oil to slidable parts. SOLUTION: In this scroll compressor, an orbiting scroll 5 and a stationary scroll 4 having spiral laps are meshed with each other in a hermetic container 1 so as to constitute a compressor which is supported by a frame 8, and an Oldham's ring 10 for turning the orbiting scroll 5 without removing the same about its axis, is interposed between the compressor and the frame 8. In this arrangement, an Oldham's ring sliding part including a key groove 8a formed in the frame 8 and a key 10b formed on the Oldham's ring 10 is formed in an oil feed passage 19 for supplying oil into an oil sump defined in the bottom part of the hermetic container 1 so as to efficiently supply oil to the Oldham's ring sliding part in order to enhance the lubricity of the slidable surfaces, thereby it is possible to enhance the compressible function and a slidable reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor for compressing a refrigerant, and more particularly to a refrigerator / refrigerator and a refrigerator / air conditioner using the scroll compressor.

[0002]

2. Description of the Related Art In recent years, as a compressor used for freezing / refrigeration or freezing / air conditioning, a scroll compressor for compressing a fluid by using an orbiting scroll is often used instead of a conventional reciprocating compressor. It has become.

In a scroll compressor as a compressor for such a refrigerant, a keyway for engaging a key provided on an Oldham ring is usually provided in a frame supporting the orbiting scroll. It supports the revolving motion of the orbiting scroll. Conventionally, lubrication of the sliding part of the Oldham ring on the frame side is performed by using a differential pressure or a pump to supply oil used for lubrication of the slewing bearing from an oil reservoir provided at the bottom of the compressor to an oil supply hole of the main shaft. The lubricating oil is splashed by a balance weight during the rotational movement, so that the lubricating oil depends only on the lubricating oil supplied through the lubrication hole of the main shaft. I was

Further, in the prior art, in order to more positively supply the oil in the compressor, for example, Japanese Unexamined Patent Publication No.
As described in Japanese Patent No. 994, in a compressor of a low pressure chamber type, an oil chamber is provided on a high pressure side in a closed vessel, and oil accumulated in the oil chamber is supplied by utilizing a pressure difference from a pressure on a high pressure side. The structure is already known. Further, in a high pressure chamber type compressor having a back pressure chamber of an intermediate pressure, an oil reservoir is provided at the bottom of the back pressure chamber as described in Japanese Patent Application Laid-Open No. 58-160582, and the oil accumulates in the oil reservoir. There is also known a structure in which the oil is provided in a balance weight and is sprung up into a mist by centrifugal force by an oil supply passage.

[0005]

However, according to the above prior art, first, in the above-mentioned low pressure chamber type compressor, an oil reservoir is provided on the high pressure side to supply oil by a differential pressure. The oil reservoir only catches the oil adhering to the inner wall of the chamber, etc., and does not have any other means for actively storing the oil. Therefore, the oil reservoir is not always in a state in which the oil reservoir can be supplied. There is a problem.
Further, if the oil reservoir is depleted of oil and the oil passage is not filled with oil, the sealing effect of the pressure due to the oil flow path resistance is lost, and it is difficult to maintain the intermediate pressure in the back pressure chamber. There were also problems.

In the above-described conventional high-pressure chamber type compressor, oil is supplied to the sliding portion of the Oldham ring by using oil used for lubricating the slewing bearing by using a differential pressure or a pump. In this case, the oil was supplied from an oil reservoir provided at the bottom of the compressor through an oil supply hole of the main shaft, and was supplied by splashing the oil with a balance weight during the rotational movement. There was a problem that it was difficult to refuel under operating conditions where the number of revolutions was low. Moreover, in the above technology, a method of actively lubricating the sliding surfaces of the Oldham ring key and the key groove on the frame side is not employed, and the method depends only on splashing from the balance weight. If the room is not filled with mist-like oil, the oil does not reach the sliding surface. Therefore, at the moment such as when the compressor is started, the sliding surface between the Oldham ring key and the frame side keyway is not immediately lubricated,
There is a problem that frictional resistance increases and wear is accelerated.

On the other hand, from the viewpoint of refrigerant, CFCs conventionally used as working fluids for refrigerators / refrigerators and air conditioners are used.
12. It is pointed out that HCFC22, etc., destroys the ozone layer in the stratosphere because it has chlorine in its molecule.
It has become a social problem. As an alternative refrigerant to these conventional refrigerants, HFC134a which does not have chlorine in the molecule at present is available.
So-called HFC-based refrigerants such as R410A and R407C are considered to be promising. However, these alternative refrigerants lose the lubricating effect of chlorine as an extreme pressure additive, unlike conventional refrigerants. From this, it is pointed out that in the refrigerating cycle including the refrigerating / refrigerator and air conditioning equipment, the lubrication state of the compressor is becoming more severe, and the performance and reliability of the refrigerating cycle are reduced due to the increase in friction and wear. Is done.

In view of the above problems, an object of the present invention is to provide a lubricating environment in which the lubrication environment is severe, that is, even when an alternative refrigerant which cannot provide a lubricating effect by itself is used, as described above. Problems such as friction, wear, and lubrication at the contact portion between the Oldham ring and the frame of the scroll compressor can be solved, thereby providing a scroll compressor having high compression performance and high sliding reliability. By using such a scroll compressor, a refrigeration system that can maintain high reliability even with an alternative refrigerant
An object of the present invention is to provide a refrigerator and refrigeration / air-conditioning equipment.

In the present invention, the freezer / refrigerator is a concept including a refrigerator, a freezer, or a refrigerator provided with a freezer, and the freezer / air conditioner is a concept including various air conditioners provided with a refrigeration cycle. is there.

[0010]

According to the present invention, in order to achieve the above object, a compressor section formed by combining a orbiting scroll having a spiral wrap and a fixed scroll, In a scroll compressor provided with a frame that supports the orbiting scroll and an Oldham ring that is provided between the compressor unit and the frame and that drives the orbiting scroll to rotate without rotating, the scroll compressor further includes: There is provided a scroll compressor provided with an oil supply path for supplying oil from an oil reservoir formed at the bottom of the hermetic container to an Oldham ring sliding portion for preventing rotation of the orbiting scroll.

According to the present invention, in the above scroll compressor, the Oldham ring sliding portion includes a key formed on the back surface of the orbiting scroll and a keyway formed on the frame.

According to the present invention, in the scroll compressor described above, the oil supply passage is provided between an oil reservoir formed at the bottom of the closed container and a key groove of the frame forming an Oldham ring sliding portion. There is communication between them.

Further, according to the present invention, in the scroll compressor described above, a valve which opens in one direction to allow oil to flow from the oil reservoir only in the direction of the Oldham ring sliding portion to a part of the oil supply path. Was provided.

According to the present invention, in the above-described scroll compressor, a check valve for preventing oil from flowing from the sliding portion of the Oldham ring toward the oil reservoir is provided in a part of the oil supply path. Provided.

According to the present invention, in the above-described scroll compressor, the oil supply path is formed by one pipe.

According to the present invention, in the above-described scroll compressor, a part of the oil supply passage is formed by a hole formed in a wall surface of the closed container.

Further, according to the present invention, there is provided a refrigerator / refrigerator for compressing a refrigerant circulating inside a refrigeration cycle using the above-mentioned scroll compressor.

In addition, according to the present invention, there is provided a refrigeration / air-conditioning apparatus for compressing a refrigerant circulating inside a refrigeration cycle using the above-described scroll compressor.

[0019]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. First,
FIG. 1 is a longitudinal sectional view of a vertical scroll compressor according to a first embodiment of the present invention. In this cross section,
The vertical scroll compressor has a compressor unit 2 and an electric motor unit 3 housed in a closed container 1. The compressor unit 2 is a so-called scroll compressor, and a compression chamber is formed by engaging the fixed scroll 4 with the orbiting scroll 5. The fixed scroll 4 constituting the scroll compressor includes a disk-shaped end plate 4a and a spirally formed wrap 4b formed on the end plate 4a.
A discharge port 6 is provided at a central portion thereof, and a suction port 7 is provided at an outer peripheral portion thereof.

On the other hand, similarly to the fixed scroll 4, the orbiting scroll 5 also has a disk-shaped end plate 5a, a wrap 5b formed in a spiral shape from the end plate, and a non-wrap surface of the end plate. And a boss 5c formed.

The frame 8 has a bearing at the center thereof, and the bearing 9 rotatably supports the main shaft 9. An eccentric shaft 9b is attached to the tip of the main shaft 9, and the eccentric shaft 9b
Is inserted into a boss 5c formed on the lower surface of the orbiting scroll 5 so as to give the orbiting scroll 5 a turning motion as the main shaft 9 rotates.

Above the frame 8, the fixed scroll 4 is fixed by bolts (not shown), while the orbiting scroll 5 is attached to the Oldham ring 1
Thus, the orbiting scroll 5 can make a revolving motion with respect to the fixed scroll 4 without rotating.

Further, the motor portion 3 is directly connected to the lower portion of the main shaft 9 so that the rotation of the motor portion 3 is performed via the main shaft 9 and the eccentric shaft 9b at the tip thereof.
The orbiting scroll 5 is caused to orbit with respect to the fixed scroll 4 without rotating, thereby compressing the refrigerant. Further, a suction pipe 11 (in which suction pressure acts) for introducing compressed refrigerant is connected to a suction port of the fixed scroll 4, while a discharge port 6 of the fixed scroll 4 is connected to the suction port of the fixed scroll 4. Is connected to a lower chamber via a passage (not shown), and further to a discharge pipe 13 (discharge pressure acts) penetrating through the sealed container 1.

On the other hand, an intermediate pressure between the suction pressure and the discharge pressure acts on a space (back pressure chamber) 14 surrounded by the back surface of the orbiting scroll 5 and the frame 8. In addition,
The gas in the middle of the compression inside the scroll compressor of the compression unit 2 is guided into the back pressure chamber at the intermediate pressure through a fine hole (back pressure hole) 15 provided in the end plate 5 a of the orbiting scroll 5. This gas acts on the back of the orbiting scroll 5. Then, the orbiting scroll 5 is pressed against the fixed scroll 4 by the action of the gas from the rear surface, thereby sealing the compression chambers and sealing the outer mirror plate surfaces of both scroll members.

Next, the oil in the oil reservoir 16 formed at the bottom of the closed container 1 is discharged from the oil reservoir 16 by the pressure difference between the discharge pressure in the closed container 1 and the pressure in the back pressure chamber 14. A lubrication pipe 17 protruding from the main shaft 9 and a lubrication hole 9a
After that, oil is supplied to sliding parts such as bearings of the above mechanism. The oil discharged from the sliding parts such as the bearings passes through the back pressure chamber 14 and is discharged from the back pressure hole 15 through the inside of the scroll compressor. Then, the discharged oil and gas pass through a passage or a guide (not shown) and pass through the closed container 1.
Flows to the electric motor section 3 along the inner wall surface. Further, the oil separated at the coil end 3a of the electric motor portion 3 flows down to the oil reservoir 16 below, while the compressed gas flows along the inner wall of the closed vessel 1 and is discharged from the discharge pipe 13. .

Here, the Oldham ring sliding portion forming the rotation preventing mechanism, which is a feature of the present invention, includes the keyway (not shown) of the orbiting scroll 5 and the Oldham ring 1.
0 Oldham key (not shown) and the frame 8
Keyway 8a and key 10 on the opposite side of Oldham ring 10
b, and the Oldham key linearly reciprocates with respect to these key grooves.

In the scroll compressor of the present invention having the above-described structure, oil is supplied to the sliding portion of the Oldham ring by the oil supply passage 1 provided along the inner wall of the closed casing 1.
9, the oil in the oil reservoir 16 is formed by the pressure difference between the discharge pressure in the closed container 1 and the intermediate pressure in the back pressure chamber 14. The oil supply passage 19 is provided between the oil sump 16 and the key groove 8a on the frame 8 side as shown in the drawing, and communicates with each other. As a result, the key 10b of the Oldham ring and its frame It is possible to supply oil directly from the oil reservoir 16 to the sliding portion with the key groove 8a on the 8 side. Therefore, a delay in refueling can be reduced even immediately after the start of the compressor, thereby enabling effective lubrication.

Next, FIG. 2 shows a cross section of a second embodiment when the present invention is applied to a horizontal scroll compressor. This figure shows a horizontal cross section, and is a view in which the lower half of the scroll compressor is viewed from above by the horizontal cross section. FIG. 3 is a view showing a vertical section of an Oldham ring portion on the frame 8 side of the horizontal scroll compressor according to the second embodiment, and is a sectional view taken along the line AA in FIG. is there.

As apparent from these figures, the horizontal scroll compressor according to the second embodiment also has
The oil supply passage 19 is provided in the oil reservoir 1 formed in the lower half of the closed container 1.
6 and the keyway 8a on the side of the frame 8 are provided so as to communicate with each other, as in the first embodiment. Therefore, the key 10b of the Oldham ring 10 and the Oldham keyway 8 on the
The effect of lubrication on the sliding portion a is the same as in the vertical scroll compressor according to the first embodiment shown in FIG.

Next, a scroll compressor according to still another embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. In the following description of embodiments, an example in which the present invention is implemented in a vertical scroll compressor will be described. However, the present invention is not limited to the vertical scroll compressor, but all of them are the vertical scroll compressor shown in FIG. 1 and the horizontal scroll compressor shown in FIGS. Similar to the relationship with the compressor, the same can be applied to a horizontal scroll compressor, and the same effect can be obtained when the invention is applied to a horizontal scroll compressor. .

FIG. 4 shows a compressor of the same type as the scroll compressor shown in FIG. Note that, in FIG. 4 as well, the same reference numerals as those in FIG.
Detailed description is omitted. In the scroll compressor according to the third embodiment, the oil supply path 19
The oil reservoir 16 of the closed container 1 and the keyway 8a of the frame side 8 are provided so as to communicate with each other as described above.
A valve 20 that opens only in one direction is provided so that it flows only in the direction of the keyway 8a on the frame 8 side.

The valve 20 which opens only in one direction is, for example, as shown in FIG. 5 (A), a thin metal plate 201 is hinged to the lower end of the oil supply passage 19 only in one direction by a hinge 202. It is configured so as to be rotatable or, as shown in FIG. 5B, a flexible plate 203 made of plastic or the like is attached to the lower end of the oil supply passage 19.

According to the valve 20 which opens only in one direction,
For example, even when the pressure difference between the oil reservoir 16 and the back pressure chamber disappears due to the stoppage of the compressor, the oil supply passage 19 is operated during the operation of the compressor.
The oil filling the inside is prevented from returning to the oil sump 16, so that the oil supply passage 19 is always filled with the oil even when the compressor is stopped. Therefore, even if the differential pressure is slightly applied immediately after the compressor is restarted, the sliding portion between the key 10b of the Oldham ring 10 and the key groove 8a on the frame 8 side can be immediately supplied with oil.

In the embodiment shown in FIG. 4,
In the description, the valve 20 that opens only in one direction is provided at the oil supply path entrance (lower end) on the oil reservoir 16 side in the oil supply path 19. However, the valve 20 is not limited to the above-described position, and may be provided in another portion of the oil supply path 19, and in that case, the effect is not changed.

Next, FIG. 6 shows another embodiment in which the present invention is applied to a compressor of the same type as the scroll compressor also shown in FIG. Here, the same reference numerals as those in FIG. 1 indicate the same components, and the detailed description thereof will be omitted. In the scroll compressor according to the fourth embodiment, the oil supply path 19 is provided between the oil reservoir 16 of the sealed container 1 and the key groove 8a on the frame 8 side, and the oil supply path 19 is further provided. The oil supply passage 19 is provided with a check valve 21 for preventing the oil from flowing back from the side of the key groove 8a on the frame 8 side toward the oil reservoir 16 instead of the valve 20 that opens only in one direction in FIG. I have. The structure of this check valve is shown in FIG.
4 and the valve 20 of FIG. 4 is replaced with the valve 2 of FIG.
This is equivalent to moving to position 1.

According to this configuration, by providing the check valve 21, the pressure difference between the oil sump 16 and the back pressure chamber due to the operating condition of the compressor or the stoppage of the compressor is provided in the same manner as described above. Even when the oil is exhausted, the oil filling the oil supply path 19 is prevented from flowing back to the oil reservoir 16, so that the oil supply path 19 is always filled with oil. Therefore, just after the compressor is restarted, the sliding pressure between the key 10b of the Oldham ring 10 and the key groove 8a on the frame 8 can be supplied only by a slight pressure difference. Is the same as described above.

FIG. 7 shows an embodiment applied to a compressor of the same type as the scroll compressor shown in FIG. In each of the above embodiments, the oil supply passage 19 is not limited to an integral pipe,
Although this can be formed to include, for example, a plurality of pipes, grooves, and the like, in the fifth embodiment, the oil supply path 19 is formed by the oil reservoir 16 of the closed casing 1 and the key groove 8a on the frame 8 side. It is formed by an integral pipe which communicates between them. As described above, by forming the oil supply passage 19 by an integral pipe, similar to the above, quick oil supply is possible even with a small differential pressure such as immediately after the start of the compressor. Therefore, it is possible to reduce the flow resistance in the oil supply passage 19 and reduce the cross-sectional area thereof.

It should be noted that the oil supply passage 19 composed of the integral pipe is used.
Can be used as a tube, but instead of this, for example, a Teflon tube or a tube made of an organic material coated with a refrigerant corrosion-resistant coating may be used. .

Further, in the same manner as in the embodiment shown in FIG. 4 or FIG.
By providing the valve 20 or the check valve 21 that opens only in one direction in a part of the nozzle 9, the oil supply delay time can be further reduced, which is effective.
In this case as well, the effect of the valve 20 or the check valve 21 which opens only in one direction is not changed even if it is provided in any part of the oil supply path 19. It may be provided in any part such as the entrance (lower end) and outlet (upper end) of the 19 or an intermediate portion.

Next, FIG. 8 shows another embodiment in which the present invention is applied to a compressor of the same type as the scroll compressor also shown in FIG. 1 described above. The same reference numerals as 1 denote the same components, and a detailed description thereof will be omitted. In the sixth embodiment, each of the oil supply passages 19 is constituted by one straight pipe, and the lower end thereof is disposed in the oil reservoir 16 and the upper end thereof is formed in the frame 8. At the end of the keyway 8a formed at
It is designed to communicate between them. According to such a configuration, the oil supply passage 19 is more easily manufactured as compared with the case where the oil supply passage 19 is formed by the integral pipe, and therefore, it is particularly effective in reducing the production cost of the compressor. .

FIG. 9 also shows another embodiment in which the present invention is applied to a compressor of the same type as the scroll compressor also shown in FIG. 1 described above. The same reference numerals denote the same components, and a detailed description thereof will be omitted. In the seventh embodiment, the oil supply passage 19 is formed by providing a through hole in the outer wall of the chamber forming the closed container 1. The oil supply passage 19 and the frame are formed by the oil supply passage 19. 8 and the keyway 8a formed therein are communicated in the same manner as described above. However, according to the form in which the oil supply passage 19 is formed by providing the through hole in the outer wall of the chamber as described above, unlike the structure in which the pipes for forming the oil supply passage 19 are individually attached as described above, Since the oil supply passage 19 can be formed integrally with the outer wall of the chamber, the vibration of the pipe due to the vibration during operation of the compressor and the generation of noise accompanying the pipe, and the pipe due to the vibration during the operation of the compressor, etc. Damage and natural vibration can be prevented.

Finally, FIG. 10 also shows another embodiment in which the present invention is applied to a compressor of the same type as the scroll compressor also shown in FIG. 1 described above. The same reference numerals as 1 denote the same components, and a detailed description thereof will be omitted. In the eighth embodiment, as in the embodiment shown in FIG. 8, each of the oil supply passages 19 is constituted by a single straight pipe, and the lower end thereof is provided in the oil sump 16. The upper end is arranged at the end of the key groove 8a formed in the frame 8 so as to communicate therewith. However, as is clear from the drawing, the present embodiment Then, the portion of the hole in the tube, namely,
The inside diameter of the oil supply passage in the pipe is set to be larger than the inside diameter of the oil supply passage in the portion of the key groove 8 a formed in the frame 8. As described above, by forming the key groove 8a in the frame 8 as a thin narrowed portion, the flow resistance of the oil in a part of the oil supply path 19 is increased as compared with the other parts.

As described above, by providing the throttle portion in a part of the oil supply passage 19, the oil to be supplied from the oil supply passage 19 to the sliding portion between the key 10b of the Oldham ring 10 and the key groove 8a on the frame 8 side. Can be optimally limited.
As a result, it is possible to prevent the excessive oil supply from causing a resistance to the movement of the Oldham ring 10, thereby eliminating an increase in mechanical loss.

Even when there is no differential pressure such as when the compressor is stopped, the flow resistance is large, so that the backflow of oil can be prevented, and the oil supply path can always be filled with oil. for that reason,
Even without using the valve 20 or the check valve 21 as described above, it is possible to quickly refuel the compressor immediately after the start thereof, and to improve the performance of the compressor. It is also effective in terms of manufacturing costs.
In addition, the position of the throttle portion provided in a part of the oil supply path is provided in the hole portion on the key groove 8a side of the frame 8 in FIG. 9 described above, however, the position is limited only to the above. Other than, for example, refueling channel 1
No matter where it is installed, its effect remains unchanged.
9 may be provided in the tube.

Further, the scroll compressor according to each of the above-described embodiments is provided with the HFC 134a, R410A, R407A having no chlorine in the refrigerant molecule from the suction pipe 11 thereof.
Even when a so-called HFC-based alternative refrigerant such as C is used, since the refrigerant in the compressor is well lubricated, the performance of the refrigeration cycle due to friction and wear at the sliding and contact portions between the Oldham ring and the frame. This can be compressed to a desired pressure and supplied from the discharge pipe 13 without lowering the reliability. Therefore, it can be used for various refrigerators and refrigerators and refrigerators and air conditioners, and can be used for compressing the refrigerant flowing in the refrigerator cycle.

[0046]

As described above in detail, according to the present invention, even in an alternative refrigerant environment where the lubrication state is severe, the sliding portion between the Oldham ring and the Oldham keyway of the frame in the scroll compressor can be used. The lubrication was improved significantly, especially immediately after the compressor was started, to improve the lubrication condition, thereby providing a scroll compressor with improved compression performance and sliding reliability. By using the refrigeration / refrigerator and the refrigeration / air conditioning equipment, it is possible to provide a refrigeration cycle having high compression performance and high reliability.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a vertical scroll compressor having an oil supply path to a sliding portion according to a first embodiment of the present invention.

FIG. 2 is a horizontal sectional view of a horizontal scroll compressor having an oil supply path to a sliding portion according to a second embodiment of the present invention.

FIG. 3 is an AA cross-sectional view of the horizontal scroll compressor according to the second embodiment shown in FIG. 2;

FIG. 4 is a longitudinal sectional view of a scroll compressor having an oil supply path to a sliding portion and a valve according to a third embodiment of the present invention.

FIG. 5 is a structural explanatory view showing an example of the structure of the valve of the scroll compressor according to the third embodiment of the present invention shown in FIG. 4;

FIG. 6 is a vertical sectional view of a scroll compressor having an oil supply path to a sliding portion and a check valve according to a fourth embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view of a scroll compressor according to a fifth embodiment of the present invention, in which an oil supply path to a sliding portion is formed by a pipe.

FIG. 8 is a vertical cross-sectional view of a scroll compressor according to a sixth embodiment of the present invention, in which an oil supply path to a sliding portion is formed by a pipe and a hole.

FIG. 9 is a vertical cross-sectional view of a scroll compressor according to a seventh embodiment of the present invention, in which an oil supply passage to a sliding portion is formed by holes.

FIG. 10 is a longitudinal sectional view of a scroll compressor according to an eighth embodiment of the present invention, in which an oil supply path to a sliding portion is formed by a hole having a throttle portion in a part thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Compressor part 3 Motor part 4 Fixed scroll 5 Orbiting scroll 8 Frame 8a Keyway on the frame side 9 Main shaft 9a Oil supply hole 10 Oldham ring 10b Key (on the opposite side of Oldham ring) 16 Compressor bottom oil sump 18 Balance Weight 19 Oil supply path 20 Valve 21 Check valve

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigekazu Nozawa 390 Muramatsu, Shimizu-shi, Shizuoka Pref.Hitachi, Ltd.Air Conditioning Systems Division (72) Inventor Koichi Sekiguchi 800, Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Hitachi, Ltd. Inside the factory cooling and heating division

Claims (10)

[Claims] 1. A compressor section formed by combining a orbiting scroll having a spiral wrap and a fixed scroll, a frame supporting the orbiting scroll of the compression mechanism, and a section between the compressor section and the frame. Provided in
In a scroll compressor provided with an Oldham ring for orbiting the orbiting scroll without rotating, the oil in an oil reservoir formed at the bottom of the closed container is used to prevent rotation of the orbiting scroll. Compressor provided with an oil supply passage for supplying to a sliding portion of an Oldham ring for use in the scroll compressor. 2. The scroll compressor according to claim 1, wherein the Oldham ring sliding portion includes a keyway formed in the frame and a key formed in the Oldham ring. Compressor. 3. The scroll compressor according to claim 2, wherein the oil supply passage is provided between an oil reservoir formed at a bottom of the closed container and a key groove of the frame forming an Oldham ring sliding portion. A scroll compressor characterized by communicating with a scroll compressor. 4. The scroll compressor according to claim 1, wherein a valve that opens in one direction is provided in a part of the oil supply path to allow oil to flow only from the oil reservoir to the Oldham ring sliding portion. A scroll compressor characterized by being provided. 5. The scroll compressor according to claim 1, wherein a check valve is provided in a part of the oil supply passage to prevent oil from flowing from the sliding portion of the Oldham ring toward the oil reservoir. A scroll compressor. 6. The scroll compressor according to claim 1, wherein the oil supply path is formed by a single pipe. 7. The scroll compressor according to claim 1, wherein a part of the oil supply path is formed by a hole formed in a wall surface of the closed container. 8. The scroll compressor according to claim 1, wherein a throttle portion is provided in a part of said oil supply path. 9. A refrigerator / refrigerator using the scroll compressor according to claim 1 to compress a refrigerant circulating inside a refrigeration cycle. 10. A refrigeration / air-conditioning apparatus for compressing a refrigerant circulating inside a refrigeration cycle using the scroll compressor according to claim 1.