JPH07259755A - Scroll type compressor - Google Patents

Abstract

PURPOSE:To prevent the occurrence of wear of an Oldham's ring owing to the increase of a load occasioned by the use of a low lubricity halogenized carbonization compound system mixture refrigerant and the improvement of performance of a compressor and to improve durability, in a scroll type compressor, especially a slide member, used in a freezing refrigerating device and an air-conditioner. CONSTITUTION:A scroll type compressor comprises a revolving scroll and a fixed scroll which have a spiral lap standing-upright on an end plate and are geared with each other; a block fixing the fixed scroll; and an Oldham's ring 1 being a rotation preventing mechanism to effect revolving movement through prevention of rotation of the revolving scroll. The Oldham's ring 1 has an aluminum alloy cast 1c in which preform 1b of ceramic fibers is cast.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type compressor used for a refrigerating machine, an air conditioner or the like, and more particularly to improvement of a sliding member.

[0002]

2. Description of the Related Art In recent years, scroll type compressors used in freezers and refrigeration units and air conditioners have been used under severer conditions due to higher performance and higher performance, and improvement in durability is desired.

On the other hand, difluorodichloromethane (hereinafter referred to as CFC12), which is a refrigerant containing chlorine in its molecule, has been used conventionally due to environmental problems such as ozone depletion and global warming.
Or difluorochloromethane (hereinafter referred to as HCFC22) or the like, a refrigerant containing no chlorine in the molecule 1.1.1.
2 Tetrafluoroethane (hereinafter referred to as HFC134a), refrigerant difluoromethane (hereinafter referred to as HFC32), refrigerant pentafluoroethane (hereinafter referred to as HFC125), refrigerant 1.1.2 trifluoroethane (hereinafter referred to as H)
The change to a mixed refrigerant of two or more types such as FC143a) is being considered. However, any of the HFC-based mixed refrigerants that do not contain chlorine in the molecule have poor lubrication performance and it is necessary to improve the characteristics of the sliding member of the compressor.

A conventional refrigerant HCF will now be described with reference to the drawings.
The scroll compressor for C22 and a part of its sliding member will be described.

17 and 18 show the structure of a conventional scroll compressor. 20 is a scroll type compressor. Reference numeral 21 is a closed casing, 22 is an electric motor part, and a block 23, a fixed scroll 24,
A machine unit main body 27 including an orbiting scroll 25 and an Oldham ring 26 is fixed.

The fixed scroll 24 is composed of an end plate 24a and an involute which is upright on the end plate 24a or a flap 24b having a uniform thickness of a curved line similar to the involute, and is fixed to the block 23 by the end plate 24a.

Further, the orbiting scroll 25 is upright on the end plate 25a and the end plate 25a, and the wrap 2 of the fixed scroll 24 is provided.
The end plate 25a is constrained by an Oldham ring 26 which is a rotation preventing mechanism.

The fixed scroll 24 and the orbiting scroll 25 are the winding end 24 of each wrap 24b, 25b.
b'and 25b 'are fitted together with a certain angle shift.

28 is a discharge hole, 29 is a suction hole, the discharge hole 28 is at the center of the involute of the fixed scroll 24, and the suction hole 29 is the end plate 24a of the fixed scroll 24.
The suction hole 29 provided at the outer edge of the suction port 29 communicates with the suction chamber 29a. Reference numeral 20 denotes a protrusion provided on the surface of the orbiting scroll 25 opposite to the wrap 25b, which is concentric with the center of the involute of the wrap 25b. 31 is block 23
The shaft 30 is supported by the machine part main body 27, and the protrusion 30 of the orbiting scroll 25 is housed in a boss portion 31a that is eccentric from the shaft center. There is.

Reference numeral 21b is an oil supply passage, and the boss portion 31
a is communicated with the lower part of the closed casing 21. Reference numeral 32 denotes a space formed on the back surface of the orbiting scroll 25 and communicates with the suction chamber 29a through a clearance A between the end plates 24a and 25b.

Reference numeral 23 is a compression chamber, and 34 is an orbiting scroll 2.
5 is a thrust holding mechanism (for example, a ball bearing or the like) that comes into contact with the end plate 25a on the side opposite to the lap side. Reference numeral 35 is a suction pipe communicating with the suction hole 29, and 36 is a discharge pipe.

Next, the compression mechanism of the scroll compressor will be described. The rotational movement of the shaft 31 accompanying the rotation of the electric motor portion 22 is transmitted to the orbiting scroll 25 via the boss portion 21a and the protrusion portion 30, but the orbiting scroll 25 does not rotate by the action of the rotation preventing mechanism 26 and does not rotate. A turning motion is performed with the center of the involute of 24 as the turning center.

At this time, the wrap 2 of the orbiting scroll 25
When the winding end end 5b 'of 5b is in contact with the wrap 24b of the fixed scroll 24 and the winding end end 24b' of the wrap 24b of the fixed scroll 24 is in contact with the wrap 25b of the orbiting scroll 25, the suction is completed, and the orbiting scroll is completed. The pressure in the compression space 33 increases as the two contact points between the lap 24b and the lap 25b approach the center of the involute along with the revolution movement of the lap 25.

By the compression mechanism of this scroll compressor,
The refrigerant sucked from the suction pipe 35 through the suction hole 29 is compressed and once discharged into the closed casing 21 through the discharge hole 28, and then discharged through a discharge pipe 36 to a cooling system (not shown). It

In this compression stroke, the fixed scroll 2
4, and the end plates 24a, 25a and the laps 24b, 25b of the orbiting scroll 25 are deformed by pressure load and heat load.

Further, the end plate 25a of the orbiting scroll 25
Is an anti-rotation mechanism, the Oldham ring 26, the fixed scroll end plate 24a, and the fixed scroll wrap 24b.
The projection 30 comes into contact with and slides on the tip of the boss 2
Sliding in contact with 1a. Further, the end plate 24a of the fixed scroll 24 is the end plate 25b of the orbiting scroll 25 and the wrap 2.
It slides in contact with the tip of 5a.

As a material for the orbiting scroll 25, a ferrous metal such as conventional cast iron is generally used. Further, cast iron was used as the material of the Oldham ring 26 which is the rotation preventing mechanism, and the Lube bright treatment was applied to improve wear resistance.

[0018]

However, in the above-mentioned structure, the sliding members are worn and compressed due to the increase in load due to the use of the HFC mixed refrigerant having low lubricity and the improvement in the performance of the compressor. There was a problem that the durability of the machine could not be maintained. In particular, the Oldham ring in the conventional example is a HFC with poor lubricity even though it has been subjected to Luberite treatment.
When it is used as a system mixed refrigerant, the Luberite process disappears in a relatively short period of time, and the wear of the cast iron of the base material significantly progresses.

When ester-based refrigerating machine oil having a high compatibility with the HFC-based mixed refrigerant is used, the organic acid, which is a hydrolyzate of the refrigerating machine oil, and the abrasion powder of the metal sliding portion are combined, so-called metal soap is formed. It is generated and easily adheres to the inner wall surface of the cooling system pipe, which becomes a factor to hinder the flow of the refrigerant.

For example, an overload test for a short period (100 hours) was conducted using the scroll compressor described above. As a refrigerant,
Two kinds of mixed refrigerants of HFC134a and HFC32 were used, and two kinds of mixed oil of ester simple substance oil corresponding to VG56, ether type oil and mineral oil were used as refrigerating machine oil. As a result of the test, the Oldham ring, which is one of the sliding members, for both the single oil and the mixed oil was abraded by 2000 μm or more. Further, black foreign matter was generated in both oils.
In particular, the foreign matter generated in the ester-based simple oil is a carboxylic acid metal salt that is a reaction product of the ester-based oil and iron powder, which causes an increase in the flow resistance of the system piping.

In view of the above problems, the present invention proposes a sliding member which uses an HFC-based mixed refrigerant and which avoids wear of the Oldham ring and the orbiting scroll for a scroll type compressor with a heavy load, and compresses it. It improves the durability of the machine.

[0022]

In order to solve the above-mentioned problems, a scroll compressor of the present invention comprises a refrigerant in which two or more kinds of chlorine-free halogenated carbon compounds are combined, and an ether oil dissolved in the refrigerant. Or a glycol-based oil or an ester-based oil alone or a refrigerating machine oil consisting of a mixed oil of a mineral oil or an alkylbenzene-based oil that does not dissolve in a refrigerant and an oil that dissolves in the refrigerant is used. Of two orbiting scrolls and fixed scrolls that have spiral wraps that engage with each other, a block that fixes the fixed scrolls, and an Oldham ring that is a rotation prevention mechanism that prevents rotation of the orbiting scrolls and causes a rotation motion. The Aldham ring has a compression element that is It is obtained by the chloride alloy castings.

The Oldham ring is an aluminum alloy casting in which a nickel-based metal foam is cast as a reinforcing material.

A preform of a ceramic fiber or a nickel-based metal foam cast as a reinforcing material for the Oldham ring is located on the Oldham ring protrusion.

Further, the surface of the Oldham ring is subjected to electroless nickel composite plating or electroless cobalt-phosphorus surface treatment as a self-lubricating surface treatment.

Further, the surface of the Oldham ring is subjected to an electroless cobalt-phosphorus surface treatment as a self-lubricating surface treatment, and the key groove of the orbiting scroll, which is a sliding counterpart, is a nickel-based metal foam cast aluminum. It is an alloy casting.

Further, the protrusion of the Oldham ring is molded into a convex arc shape, and the surface thereof is subjected to a chrome nitride treatment as a self-lubricating surface treatment, and an orbiting scroll which is a sliding counterpart of the protrusion of the Oldham ring. The key groove is molded into a concave arc shape.

Also, an oil groove is provided in the horizontal direction on the side surface of the protrusion of the Oldham ring. Further, a large number of parallel oil grooves are provided in the oblique direction on the side surface of the protrusion of the Oldham ring.

[0029]

The present invention has the above-described structure to strengthen the key groove of the Oldham ring or the orbiting scroll which is a sliding counterpart, and to eliminate oil shortage, thereby preventing the Oldham ring from being worn and improving the durability of the scroll compressor. It improves the sex.

Further, the present invention has the above-mentioned structure.
It is possible to suppress the generation of iron-based abrasion powder and prevent the formation of a carboxylic acid metal salt that is a reaction product of an ester-based oil and iron powder, and solve the problem of an increase in flow resistance of system piping.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

1 and 2 show an Oldham ring of a scroll type compressor which is a first embodiment of the present invention.

Reference numeral 1 is an Oldham ring made of an aluminum alloy casting. Reference numeral 1a is a protrusion provided on the Oldham ring 1 and slides on the key groove of the orbiting scroll. Reference numeral 1b is a reinforcing material made of a ceramic fiber preform cast in an aluminum alloy casting by a high pressure casting method.
1c is a surface layer of an aluminum alloy casting.

The operation of the scroll compressor constructed as described above will be described with reference to the drawings.

The rotational movement of the shaft 31 accompanying the rotation of the electric motor portion 22 is transmitted to the orbiting scroll 25 via the boss portion 31a and the protrusion portion 30. The action of the Oldham ring 1 as a rotation preventing mechanism causes the orbiting scroll 25 to rotate. Rotates about the center of the involute of the fixed scroll 24 without rotating on its own axis.

Then, the compression space 33 formed by the orbiting scroll 25 and the fixed scroll 24 becomes smaller, and the pressure of the refrigerant rises. At this time, the Oldham ring 1 violently slides on the orbiting scroll 25.

However, since the Oldham ring 1 of the present invention has the reinforcing material 1b made of a preform of ceramic fiber, it does not wear even by vigorous sliding.

As described above, according to this embodiment, since the Oldham ring 1 is an aluminum alloy casting in which a preform of ceramic fiber is cast as a reinforcing material, it is possible to prevent abrasion even under severe sliding. .

The second embodiment of the present invention will be described below with reference to the drawings. 3 and 4 show an Oldham ring of a scroll type compressor which is a second embodiment of the present invention.

Reference numeral 2 is an Oldham ring made of cast aluminum alloy. Reference numeral 2a is a protrusion provided on the Oldham ring 2 and slides on the key groove of the orbiting scroll. Reference numeral 2b is a reinforcing material made of a nickel-based metal foam cast in an aluminum alloy casting by a high pressure casting method. 2c is a surface layer of the aluminum alloy casting.

The operation of the scroll type compressor configured as described above will be described with reference to the drawings.

The rotational movement of the shaft 31 due to the rotation of the electric motor portion 22 is transmitted to the orbiting scroll 25 via the boss portion 31a and the protrusion portion 30. The action of the Oldham ring 2 as a rotation preventing mechanism causes the orbiting scroll 25 to rotate. Rotates about the center of the involute of the fixed scroll 24 without rotating on its own axis. Then, the compression space 33 formed by the orbiting scroll 25 and the fixed scroll 24.
Becomes smaller and the pressure of the refrigerant rises. At this time, the Oldham ring 2 slides violently on the orbiting scroll 25.

However, since the Oldham ring 2 of the present invention has the reinforcing material 2b made of nickel metal foam,
No wear occurs even with vigorous sliding.

As described above, according to this embodiment, since the Oldham ring 2 is an aluminum alloy casting in which a nickel-based metal foam is cast as a reinforcing material, it is possible to prevent abrasion even under severe sliding. . Further, since the nickel-based metal foam easily damps vibration, it also has an effect of preventing vibration noise.

The third embodiment of the present invention will be described below with reference to the drawings. 5 and 6 show an Oldham ring of a scroll compressor which is a third embodiment of the present invention.

Reference numeral 3 is an Oldham ring made of an aluminum alloy casting. Reference numeral 3a is a protrusion provided on the Oldham ring 3 and slides on the key groove of the orbiting scroll. 3b
Is a reinforcing material composed of a nickel-based metal foam or a ceramic fiber preform cast by a high-pressure casting method on the projection of an aluminum alloy casting. 3c is an aluminum alloy casting.

The operation of the scroll compressor constructed as described above will be described with reference to the drawings.

The rotational motion of the shaft 31 accompanying the rotation of the electric motor portion 22 is transmitted to the orbiting scroll 25 via the boss portion 31a and the protrusion portion 30. The action of the Oldham ring 3, which is a rotation preventing mechanism, causes the orbiting scroll 25 to rotate. Rotates about the center of the involute of the fixed scroll 24 without rotating on its own axis.

Then, the compression space 33 formed by the orbiting scroll 25 and the fixed scroll 24 becomes smaller, and the pressure of the refrigerant rises. At this time, the Oldham ring 3 violently slides on the orbiting scroll 25.

However, since the Oldham ring 3 of the present invention has the reinforcing member 3b made of a nickel metal foam or ceramic fiber preform on the protrusion 3a, it does not wear even when it is violently slid.

As described above, according to this embodiment, since the Oldham ring 3 is an aluminum alloy casting in which a nickel-based metal foam or a preform of ceramic fiber is cast as a reinforcing material, the Oldham ring 3 is worn even under severe sliding. Can be prevented. In addition, a reinforcing material 3b made of a nickel metal foam or a ceramic fiber preform only on the protrusion 3a.
Since it is cast into, it has high moldability.

A fourth embodiment of the present invention will be described below with reference to the drawings. 7 and 8 show an Oldham ring of a scroll type compressor which is a fourth embodiment of the present invention.

Numeral 4 is an Oldham ring made of cast iron. 4a
Is a protrusion provided on the Oldham ring 4 and slides on the key groove of the orbiting scroll. Reference numeral 4b is electroless nickel composite plating or electroless cobalt-phosphorus surface treatment formed on the protrusions of cast iron by electroless plating. 3c is cast iron.

The operation of the scroll type compressor configured as described above will be described with reference to the drawings.

The rotational movement of the shaft 31 due to the rotation of the electric motor portion 22 is transmitted to the orbiting scroll 25 via the boss portion 31a and the protrusion portion 30. The action of the Oldham ring 4 as a rotation preventing mechanism causes the orbiting scroll 25 to rotate. Rotates about the center of the involute of the fixed scroll 24 without rotating on its own axis.

Then, the compression space 33 formed by the orbiting scroll 25 and the fixed scroll 24 becomes smaller, and the pressure of the refrigerant rises. At this time, the Oldham ring 4 slides violently on the orbiting scroll 25.

However, since the Oldham ring 4 of the present invention is subjected to the electroless nickel composite plating or the electroless cobalt-phosphorus surface treatment as the self-lubricating surface treatment, the Oldham ring 4 does not wear even when it is violently slid.

As described above, according to this embodiment, since the Oldham ring 4 is subjected to the electroless nickel composite plating or the electroless cobalt-phosphorus surface treatment, it is possible to prevent the abrasion even under the severe sliding. . Further, the electroless nickel composite plating and the electroless cobalt-phosphorus surface treatment have an advantage that the surface roughness after the treatment is not rough and no post-processing is required.

The fifth embodiment of the present invention will be described below with reference to the drawings. 9 and 10 show an Oldham ring of a scroll type compressor which is a fifth embodiment of the present invention.

Reference numeral 5 is an Oldham ring made of cast iron. 5a
Is a protrusion provided on the Oldham ring 5 and slides on the key groove of the orbiting scroll. 5b is an electroless cobalt-phosphorus-based surface treatment formed on the protrusions of cast iron by electroless surface treatment. 5c is cast iron as a base material.

The operation of the scroll type compressor configured as described above will be described with reference to the drawings. The rotational movement of the shaft 31 accompanying the rotation of the electric motor section 22 is
1a, transmitted to the orbiting scroll 25 via the protrusion 30, but the action of the Oldham ring 5 as a rotation preventing mechanism causes the orbiting scroll 25 to orbit around the center of the involute of the fixed scroll 24 as the orbiting center without rotating. .

Then, the compression space 33 formed by the orbiting scroll 25 and the fixed scroll 24 becomes smaller, and the pressure of the refrigerant rises. At this time, the Oldham ring 5 slides violently on the orbiting scroll 25.

However, since the Oldham ring 5 of the present invention is subjected to the electroless cobalt-phosphorus surface treatment as the self-lubricating surface treatment, the Oldham ring 5 does not wear even when it is violently slid.

As described above, according to this embodiment, since the Oldham ring 5 is subjected to the electroless cobalt-phosphorus surface treatment, it is possible to prevent the abrasion even under the severe sliding. Further, since the orbiting scroll is made of lightweight aluminum, which is approximately 1/3 of cast iron, the load on the load bearing surface is reduced, sliding loss is reduced, input is reduced, and efficiency is improved. Further, since the orbiting scroll is provided with the foam metal body, it is easy to damp vibrations, and it is needless to say that it also has the effect of preventing vibration noise.

The sixth embodiment of the present invention will be described below with reference to the drawings. 11 and 12 show the sixth embodiment of the present invention.
The Oldham ring of the scroll compressor which is the Example of this is shown.

Reference numeral 6 is an Oldham ring made of cast iron. 6a
Is a protrusion provided on the Oldham ring 6 and slides on the key groove of the orbiting scroll. 6b is a convex arcuate sliding portion formed on the projection of cast iron. 6c is a chrome nitride treatment formed on the surface of the sliding portion 6b by a metal spraying method or the like. 6d is a base material cast iron.

The operation of the scroll compressor constructed as above will be described with reference to the drawings. The rotational movement of the shaft 31 accompanying the rotation of the electric motor section 22 is
1a, transmitted to the orbiting scroll 25 via the protrusions 30, but the action of the Oldham ring 6 which is a rotation preventing mechanism causes the orbiting scroll 25 to orbit around the center of the involute of the fixed scroll 24 as the orbiting center without rotating. .

Then, the compression space 33 formed by the orbiting scroll 25 and the fixed scroll 24 becomes smaller, and the pressure of the refrigerant rises. At this time, the Oldham ring 6 violently slides on the orbiting scroll 25.

However, since the Oldham ring 6 of the present invention is subjected to the chrome nitride treatment as the self-lubricating surface treatment, it is not worn even by vigorous sliding.

As described above, according to this embodiment, since the Oldham ring 6 is subjected to the chrome nitride treatment,
Wear can be prevented even under vigorous sliding. Also,
Since the chrome nitride treatment is performed on the arcuate sliding portion 6b having no edge portion, a uniform coating is formed and abnormal wear from the edge portion can be prevented.

The seventh embodiment of the present invention will be described below with reference to the drawings. 13 and 14 show the seventh embodiment of the present invention.
The Oldham ring of the scroll compressor which is the Example of this is shown.

Reference numeral 7 is an Oldham ring made of cast iron. 7a
Is a protrusion provided on the Oldham ring 7 and slides on the key groove of the orbiting scroll. Reference numeral 7b is an oil groove provided horizontally on the side surface of the projection of the cast iron. 7c is a cast iron base material. After providing the oil groove 7b, the Oldham ring 7 may be subjected to electroless nickel composite plating by the electroless plating method, electroless cobalt-phosphorus surface treatment, and chromium nitride treatment by the metal spraying method. .

The operation of the scroll type compressor configured as described above will be described with reference to the drawings.

The rotational movement of the shaft 31 due to the rotation of the electric motor portion 22 is transmitted to the orbiting scroll 25 via the boss portion 31a and the protrusion portion 30. The action of the Oldham ring 7 as a rotation preventing mechanism causes the orbiting scroll 25 to rotate. Rotates about the center of the involute of the fixed scroll 24 without rotating on its own axis.

Then, the compression space 33 formed by the orbiting scroll 25 and the fixed scroll 24 becomes smaller, and the pressure of the refrigerant rises. At this time, the Oldham ring 7 violently slides on the orbiting scroll 25.

However, in the Oldham ring 7 of the present invention, the refrigerating machine oil is constantly supplied to the protrusions 7a by the oil grooves horizontally provided on the side faces of the protrusions of cast iron, and therefore wear is caused even by vigorous sliding. Absent.

As described above, according to the present embodiment, since the oil groove is provided in the horizontal direction on the side surface of the protruding portion 7a of the Oldham ring 7, it is possible to prevent the abrasion even under the severe sliding. In addition, since the oil groove is formed in the horizontal direction, machining is easy and the manufacturing cost can be reduced.

The eighth embodiment of the present invention will be described below with reference to the drawings. 15 and 16 show the eighth aspect of the present invention.
The Oldham ring of the scroll compressor which is the Example of this is shown. 8 is an Oldham ring made of cast iron. Reference numeral 8a is a protrusion provided on the Oldham ring 8 and slides on the key groove of the orbiting scroll. Reference numeral 8b is a large number of oil grooves provided obliquely in parallel on the side surface of the projection of the cast iron. 8c is a base material cast iron. After providing the oil groove 8b, the Oldham ring 8 may be subjected to electroless nickel composite plating by the electroless plating method, electroless cobalt-phosphorus surface treatment, and chromium nitride treatment by the metal spraying method. .

The operation of the scroll type compressor configured as described above will be described with reference to the drawings.

The rotational movement of the shaft 31 accompanying the rotation of the electric motor portion 22 is transmitted to the orbiting scroll 25 via the boss portion 31a and the protrusion portion 30. The action of the Oldham ring 8 as a rotation preventing mechanism causes the orbiting scroll 25 to rotate. Rotates about the center of the involute of the fixed scroll 24 without rotating on its own axis.

Then, the compression space 33 formed by the orbiting scroll 25 and the fixed scroll 24 becomes smaller, and the pressure of the refrigerant rises. At this time, the Oldham ring 8 slides violently on the orbiting scroll 25.

However, in the Oldham ring 8 of the present invention, the refrigerating machine oil is constantly supplied to the protrusions 8a by the large number of oil grooves 8b provided obliquely in parallel on the side faces of the protrusions of cast iron, so that it is violently slid. No wear is caused by movement. Further, even when the scroll compressor stops due to the large number of oil grooves 8b, sufficient refrigerating machine oil can be retained, so that wear does not occur even in an unstable oil supply state at the initial stage of startup.

As described above, according to the present embodiment, since a large number of oil grooves are provided obliquely on the side surface of the projection 8a of the Oldham ring 8, it is possible to prevent abrasion even under severe sliding. Further, since a large number of oil grooves are formed, it is possible to shorten the time required for mechanization without requiring precision in machining each groove.

Further, a short-term (100 hours) overload test was conducted using a scroll type compressor in which the above sliding member was changed. Two kinds of mixed refrigerants of HFC134a and HFC32 were used as the refrigerant, and ester oil corresponding to VG56 was used as the refrigerating machine oil. As described above, the test results show that when the conventional refrigerating machine oil and the conventional sliding member are combined, the sliding member is 20
While abrasion of more than 00 micrometer was generated, both the conventional refrigerating machine oil and the sliding member of the present invention had abrasion of 50 micrometer or less, and can be said to have sufficient durability. Further, according to the examination result of the present invention, no black foreign matter was generated. That is, the carboxylic acid metal salt that is a reaction product of the ester oil and the iron powder is not generated, and the flow resistance of the system pipe is not increased.

[0085]

As described above, the scroll compressor according to the present embodiment includes a refrigerant in which two or more kinds of chlorine-free halogenated carbon compounds are combined, and an ether-based oil, a glycol-based oil, or an ester dissolved in the refrigerant. A refrigerating machine oil consisting of a mixed oil of a mineral oil or an alkylbenzene-based oil that is insoluble in the refrigerant alone or an oil that is insoluble in the refrigerant is used, and a spiral wrap standing upright on the end plate is used as a component of the compressor. A compression element including two orbiting scrolls and a fixed scroll that are engaged with each other, a block that fixes the fixed scroll, and an Oldham ring that is a rotation preventing mechanism that prevents the orbiting scroll from rotating and performs a rotating motion. As a reinforcing material for the Oldham ring, an aluminum alloy casting in which a ceramic fiber preform is cast is also used. It is.

The Oldham ring is an aluminum alloy casting in which a ceramic fiber preform is cast as a reinforcing material.

The Oldham ring is an aluminum alloy casting in which a metal foam is cast as a reinforcing material.

A preform of ceramic fiber or a metal foam cast as a reinforcing material for the Oldham ring is located at the Oldham ring protrusion.

The surface of the Oldham ring is subjected to electroless nickel composite plating or electroless cobalt-phosphorus surface treatment as a self-lubricating surface treatment.

Further, the surface of the Oldham ring is subjected to an electroless cobalt-phosphorus surface treatment as a self-lubricating surface treatment, and the key groove of the orbiting scroll, which is a sliding counterpart, is made of a nickel-based metal foam cast aluminum. It is an alloy casting.

Further, the protrusion of the Oldham ring is molded into an arc shape, and the surface thereof is subjected to chrome nitride treatment as a self-lubricating surface treatment, and the key groove of the orbiting scroll which is a sliding counterpart of the protrusion of the Oldham ring is formed. Is molded into an arc shape.

Further, a molten metal groove is provided horizontally on the side surface of the protrusion of the Oldham ring. Further, a large number of parallel oil grooves are provided in the oblique direction on the side surface of the protrusion of the Oldham ring.

Further, a large number of parallel oil grooves are provided in the oblique direction on the side surface of the protrusion of the Oldham ring.

These constituent elements prevent wear of the Oldham ring and improve the durability of the scroll compressor. Further, it is possible to suppress the generation of iron-based abrasion powder, prevent the generation of a carboxylic acid metal salt that is a reaction product of the iron powder and oil, and solve the problem of an increase in flow resistance of the system piping.

[Brief description of drawings]

FIG. 1 is a front view of an Oldham ring in a first embodiment of a scroll compressor according to the present invention.

FIG. 2 is a sectional view of the Oldham ring of FIG. 1 taken along the line AB.

FIG. 3 is a front view of an Oldham ring in a second embodiment of the scroll compressor according to the present invention.

FIG. 4 is a sectional view of the Oldham ring of FIG. 3 taken along the line C-D.

FIG. 5 is a front view of an Oldham ring in a third embodiment of the scroll compressor of the present invention.

6 is a sectional view of the Oldham ring of FIG.

FIG. 7 is a front view of an Oldham ring in a fourth embodiment of the scroll compressor according to the present invention.

8 is a sectional view of the Oldham ring of FIG.

FIG. 9 is a front view of an Oldham ring in a fifth embodiment of the scroll compressor according to the present invention.

10 is a sectional view of the Oldham ring of FIG.

FIG. 11 is a front view of an Oldham ring in a sixth embodiment of the scroll compressor according to the present invention.

FIG. 12 is a sectional view of the Oldham ring of FIG. 11.

FIG. 13 is a front view of an Oldham ring in a seventh embodiment of the scroll compressor of the present invention.

14 is a sectional view of the Oldham ring of FIG.

FIG. 15 is a front view of an Oldham ring in an eighth embodiment of the scroll compressor of the present invention.

16 is a sectional view of the Oldham ring of FIG.

FIG. 17 is a cross-sectional view of a scroll type compressor in a conventional example.

FIG. 18 is an enlarged view of a main part of an orbiting scroll and a fixed scroll in a conventional example.

[Explanation of symbols]

 1,2,3,4,5,6,7,8 Oldham ring 20 Scroll type compressor

Front page continuation (72) Inventor Takanori Ishida 3-22 Takada Hondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerating Machinery Co., Ltd.

Claims (9)

[Claims] 1. A refrigerant containing a combination of two or more halogenated carbon compounds containing no chlorine, an ether oil, a glycol oil or an ester oil soluble in the refrigerant alone or a mineral oil or an alkylbenzene oil insoluble in the refrigerant. A refrigerating machine oil consisting of a mixed oil of oil and oil that dissolves in the refrigerant is used, and two mutually engaging orbiting scrolls and fixed scrolls having spiral wraps that stand upright on the end plate and the fixed scroll are fixed. A scroll-type compressor comprising a block and an Oldham ring, which is a rotation preventing mechanism for preventing the orbiting scroll from rotating and performing a rotating motion. 2. The scroll compressor according to claim 1, wherein the Oldham ring is an aluminum alloy casting in which a preform of ceramic fiber is cast as a reinforcing material. 3. The scroll compressor according to claim 1, wherein the Oldham ring is an aluminum alloy casting in which a metal foam is cast as a reinforcing material. 4. The scroll type compressor according to claim 1, wherein a preform of ceramic fiber or a metal foam cast as a reinforcing material of the Oldham ring is located at the Oldham ring protrusion. 5. The surface of the Oldham ring is subjected to electroless nickel composite plating or electroless cobalt-phosphorus surface treatment as a self-lubricating surface treatment.
The scroll compressor described. 6. An electroless cobalt-phosphorus surface treatment is applied to the surface of the Oldham ring as a self-lubricating surface treatment,
2. The scroll type compressor according to claim 1, wherein the key groove of the orbiting scroll which is a sliding counterpart is an aluminum alloy casting in which nickel-based foam metal is cast. 7. A keyway of an orbiting scroll, which is a sliding counterpart of the Oldham ring protrusion, is formed by forming the protrusion of the Oldham ring into an arc shape, and subjecting its surface to chrome nitride treatment as a self-lubricating surface treatment. The scroll-type compressor according to claim 1, wherein the scroll compressor is molded into an arc shape. 8. The scroll compressor according to claim 1, wherein an oil groove is provided in a horizontal direction on a side surface of the protrusion of the Oldham ring. 9. The scroll compressor according to claim 1, wherein a large number of parallel oil grooves are provided in a diagonal direction on the side surface of the protrusion of the Oldham ring.