JPH05340364A - Scroll compressor - Google Patents

Abstract

PURPOSE:To provide a scroll compressor having little mechanical loss and excellent durability. CONSTITUTION:A fixed scroll 1 and turning scroll 2 are both made of an Al alloy, or one of them is made of an iron system material in combination. Then are combined with each other to constitute a scroll compressor having a surface layer of an anode oxide layer impregnated with metal or resin on the surface of the Al alloy. Thus, coefficient of friction between the fixed scroll and turning scroll and leakage of compressed gas are reduced, the durability is improved by the excellent antiwear property, and the efficiency is improved to contribute to energy saving.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a highly durable scroll compressor using novel fixed and orbiting scrolls.

[0002]

2. Description of the Related Art Conventionally, cast iron and cast material of Al--Si alloy containing 10 to 25% by weight of Si and sintered material have been used for fixed and orbiting scroll materials of scroll compressors. However, there is a problem that efficiency is lowered because the wear resistance is insufficient between the fixed scroll and the orbiting scroll using these alloys. Various proposals have been made to improve these. For example, in Japanese Patent Laid-Open No. 621985/1987, a seal member is forcibly fitted into a scroll groove to prevent wear and prevent leakage of compressed refrigerant, thereby improving efficiency. When an Al-based alloy is used as the orbiting scroll member, the weight is lighter than that of an iron-based scroll member, the centrifugal force due to high-speed rotation is reduced, the load on the bearing is reduced, and the performance is improved. However, the Al-based alloy alone is inferior in wear characteristics, and it is necessary to perform alumite treatment as a surface treatment, but since the treated layer is Al ₂ O ₃ , it has a drawback that it is hard in initial conformability and wears the mating material. Therefore, there is a demand for the development of a scroll member that is more resistant to seizure and wear than before.

[0003]

As described above, in the prior art, the consideration of operating conditions under high speed and high load in which the friction surface serves as boundary lubrication was insufficient. That is, since the anodizing treatment on the Al-based alloy is porous and the surface has holes in the hard Al ₂ O ₃ , it has a sharp edge and under high load, the soft Al-based alloy of the mating material Abnormal wear occurs when cutting cast iron, which is an iron-based material. Also, since the friction coefficient is high,
Since mechanical loss and energy loss increase, there is a problem of reduced efficiency.

An object of the present invention is to provide a fixed and orbiting scroll member having excellent friction and wear characteristics and a scroll compressor having high durability.

[0005]

According to the present invention, in an Al-based alloy homogenous combination, or in an Al-based alloy and an iron-based material combination, in the case of an Al-based alloy homogenous combination, one or both of the above treatments is performed. , Performance can be improved. Similarly, when combined with an iron-based material, the performance can be improved by subjecting the Al-based alloy to the above treatment.

That is, in the scroll compressor, the fixed scroll of the fixed member and the orbiting scroll of the movable member, which have spiral-shaped blades (called the wrap) on a flat plate (called the end plate), and the phase of both wraps are 180 degrees. The two wraps are combined so as to be in contact with each other with a shift, and both wraps have an involute curve, and four orbital scrolls and fixed scrolls simultaneously form four crescent-shaped closed spaces.
The orbiting scroll is capable of advancing and sucking the refrigerant continuously by performing an orbiting motion while maintaining an orbiting radius set so that the wraps come into contact with each other. However, if the leakage during compression is not reduced, it causes a decrease in efficiency, but the wear resistance of the wrap tips of the orbiting and fixed scrolls has a great influence on the efficiency. Therefore, it is important to reduce wear by optimally combining both orbiting and fixed scroll members.

In order to achieve the above object, the present invention comprises an orbiting scroll and a fixed scroll made of an Al-based alloy, or one of them is combined with an iron-based material as an Al-based alloy. The alloy is provided with a surface layer impregnated with a metal or a resin in the voids in the anodized layer to improve initial conformability and wear resistance. The Al-based alloy according to the present invention is, by weight, Si 1 to 45%, III
A molten alloy or a sintered alloy composed of 0.1 to 20% of a group element, 0.01 to 5% of at least one of IVa group element and Va group element, and the balance Al is used.

[0008]

In the scroll compressor of the present invention, the orbiting and stationary scrolls are made of an Al alloy, an anodized layer is formed, the surface is modified to prevent the Al base from being exposed, and the surface is hardened. This is a scroll compressor in which a metal or a resin is impregnated into the voids of the anodized layer to eliminate the voids, thereby improving initial conformability and wear resistance.

The surface treatment method for the Al-based alloy applied to the present invention is to form an anodized layer having voids of the order of Å by anodization, mix chlorides to be impregnated in the electrolytic solution, and ionize by electrolysis to produce voids. It is filled by the method of impregnating the inside. Further, when the treatment is performed by the electrolytic method, by applying a bias voltage to the object to be treated, the ionized impregnated material is forcibly drawn into the cavity, so that it is possible to fill from the bottom of the cavity to the inlet. The substance to be impregnated is preferably a metal or an acrylic resin, and the atom diameter of the metal to be impregnated is preferably 4Å or less.

Next, the impregnation method will be described. The method is anodic oxidation by immersing the object to be treated in an acidic electrolytic solution containing a low-polymerization acrylic composition that is polymerized at the anode, connecting it to the anode of a DC power supply circuit, and applying a constant current with the aluminum electrode as the cathode. A surface layer is obtained in which the voids in the layer are impregnated with acrylic resin. The film thickness can be freely controlled by adjusting the processing time. Next, when impregnating a metal, an acidic first composition containing the low-polymerization acrylic composition described above is used.
In the electrolytic solution of 1), after forming the anodized layer in which the acrylic resin is impregnated in the voids in the anodized layer of the previous period, in the acidic second electrolytic solution containing chloride to be impregnated, the object to be treated and the carbon are By connecting the electrodes to an AC power source and applying a voltage of several tens of V, the acrylic resin impregnated into the voids in the anodized layer is melted and the impregnated metal is replaced. The anodized layer impregnated with the resin and metal thus obtained has excellent adhesiveness, does not cause cracks during sliding friction, and has excellent sliding properties without peeling. The impregnated metal is preferably silver, gold, etc., which have excellent sliding properties. The thickness of the metal-impregnated anodic oxide layer is preferably 60 μm or less, and if it is more than 60 μm, the temperature rise of the friction surface during sliding causes cracks, which is not preferable. Although it depends on the method of use, it is preferably 5 to 10 μm when processed by scrolling. When the orbiting and fixed scrolls are made of the same type of Al-based alloy, any scroll may be treated, and even if either scroll is treated, abrasion resistance can be sufficiently improved. Furthermore, when an iron-based material is combined with either the orbiting or the fixed scroll, sufficient performance can be improved even if one of the Al-based alloys is subjected to the above-mentioned treatment and combined.

As a strengthening component of the Al-based alloy according to the present invention, a combination of a Group IIIa element, particularly Ce of a rare earth element and at least one of Group IVa and Va elements, especially Zr, improves strength and toughness. Most effective.

Particularly, in the present invention, high strength and wear resistance Al-S
In the i-based sintered alloy, Si improves the wear resistance, but if it is less than 1% by weight, this effect is not sufficient and high strength cannot be obtained. On the other hand, when it is 45% by weight or more, the wear resistance is excellent, but the formability and plastic workability are remarkably lowered.

The Al-based alloy according to the present invention can be divided into several stages according to the requirements of strength and wear resistance depending on the amount of Si contained. Each amount of Si is divided into the following stages,
Used as required for strength and wear resistance. (1) 1-6
%, (2) 6% to 12% or less, (3) 12% to 18
% Or less, (4) more than 18% and 30% or less, (5) more than 30% and 45% or less.

Further, Cu, Mg, Fe, Mn, Co, W and Mo which will be described later can be contained on the basis of these Si amounts.

Group IIIa elements are effective for improving strength,
Outside the range of 0.1 to 20% by weight, the effect of improving the strength is insufficient. Further, the total amount with Si is preferably 65% by weight or less, and if it exceeds 65% by weight, the plastic workability of the alloy is significantly deteriorated. Particularly, 0.5 to 10% is preferable, and 1 to 5 is more preferable.
% Is preferred.

Group IIIa elements include Sc, Y and lanthanide groups (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd,
Tb, Dy, Ho, Er, Tm, Yb, Lu) and actinides (Ac, Th, Pa, U, Np, Pu, Am,
Cm, Bk, Cf, Es, Fm, Md, No), and at least one of these elements can be used. Of these elements, the rare earth elements are particularly preferable, and most of the Si particles in the solidification from the molten metal have a grain size of 1 μm.
It has a function of forming in an extremely small state of m or less. Among rare earth elements, misch metal (about 5
It is particularly preferred to use an alloy of 0% La and about 50% Ce).

It should be noted that P and alkali metals (Li, Na, K, Rb, Cs, and Fr) are considered to be effective as elements substituting for the group IIIa with similar contents.

Group IVa elements (Ti, Zr, Hf) and Va
The group element (V, Nb, Ta) is contained in an amount of 0.01% or more in order to finely form Si grains when solidifying from an Al alloy containing Si from a molten metal in combination with the group IIIa element. However, even if it exceeds 5%, no further effect is observed, and the ductility is lowered, so it is made 5% or less. Particularly, 0.1 to 3% is preferable, and 0.5 to 2% is more preferable. Group IVa elements are preferred, and Zr is particularly preferred.

The combination of the IIIa group element with the IVa group and the Va group allows fine formation of Si grains during solidification of a Si-containing Al alloy from a molten metal, and also causes S grains in the sintering process.
The effect of suppressing the growth of i grains was observed, and the number distribution of Si grains was 50 to 80% in number ratio of 1 μm or less, 15 to 30% in grain size of 1 to 2.5 μm, 2.5. ~ 5 μm
5 to 20%, and 5 to 10 μm can be 5% or less. Then, these elements are formed as an alloy powder in a chrysanthemum pattern structure that is thought to be formed by the concentration of these elements in the surroundings of the Si particles, which suppresses the growth of the Si particles during solidification and sintering. At the same time, it seems that the cleavage fracture of Si grains is eliminated and ductility is enhanced.

Particularly, Si particles having a particle size of 1 μm or less are 60 to 80%, and particles having a particle size of 1 to 2.5 μm are 22 to 30.
%, 2.5 to 5 μm is 7 to 15%, 5 to 10 μm
2% or less is preferable. By making the Si grains finer, high ductility is obtained and moldability is also improved. Further, even in the fractured surface after the bending test, the fractured surface of Si is small and a dented fractured surface can be obtained.

The chrysanthemum pattern around the Si grains of the Al alloy powder is obtained by the combination of the above-mentioned elements and the amount of Si, and IIIa
The amount of group elements is larger than the amounts of group IVa and group Va elements,
It can be obtained by setting the amounts of the IVa group and the Va group to 0.20 or less of the Si amount.

A combination of the above-mentioned IIIa group element with IVa group and Va group elements and 2 × 10 under vacuum or as oxygen partial pressure.
^By degassing and / or sintering at 350 ° C. or higher in a non-oxidizing atmosphere of ⁻³ mmHg or less, the oxygen content in the alloy can be reduced to 0.15% or less. Thereby high ductility is obtained.

The above aluminum powder alloy is produced by the air and nitrogen or argon gas atomizer method. In the case of alloy components added to supersaturation, this is S in the casting method.
The i-particles become coarse, which adversely affects strength and wear resistance. Therefore, the atomizing method is an appropriate manufacturing method for finely dispersing Si particles. A billet obtained by compression-molding such an amiminium powder alloy by cold isostatic pressing (CIP) is subjected to solid-phase sintering at a temperature of 460 to 500 ° C. in an inert gas such as vacuum, nitrogen, or argon for densification. However, even if solid-phase sintering is performed, voids remain inside and have internal defects.
At 4.5 tons / cm ² or more, especially 5 to 9 tons / cm ² to re-compress and densify by hot type compression. The sintered alloy obtained by such a manufacturing process becomes a stable precipitate or an intermetallic compound from a metastable precipitate dissolved in supersaturation, and even if it receives a thermal history at a temperature lower than the recompression heating temperature. Strain deformation is less likely to occur because the precipitate does not re-dissolve or precipitate. However, in order to obtain higher strength, the sintered alloy is preferably subjected to solution treatment by heating at 400 to 520 ° C. and then water cooling, and 100 to 200 ° C., particularly 150 to 200 ° C.
Strengthening can be achieved by the age hardening treatment. Particularly, the aging treatment is preferably performed on an alloy containing Cu and Mg.

The alloy powder is preferably solidified at a cooling rate of 50 ° C./sec or more. The particle size of the powder is preferably 350 mesh or less, and particularly preferably 30 μm or less.

The forming process before sintering is preferably 2.5 ton / cm ² or more, and particularly preferably 3 to 5 ton / cm ² .

Cu and Mg are added as 0.1% or more each as an age hardening element for precipitating an intermetallic compound by aging treatment and improving the strength of the matrix. On the other hand, if it exceeds 5%, the toughness decreases, so it should be 5% or less. Therefore, Cu is 0.1-5 wt% and Mg
In the range of 0.1 to 5% by weight, the hardness of the matrix is the highest and the strength is improved. In particular, Cu2-5%, Mg0.
1 to 1% is preferable. If the oxygen content in the alloy is 0.15% or less, Cu can be contained up to 10%.

Further, for the alloy containing Cu and Mg in order to improve strength and heat resistance, it is selected from Fe of 2.0% or less, Mn of 1.5% or less and Co of 1.5% or less. It is possible to contain at least one kind or two kinds or more. These elements form an intermetallic compound with Al to improve alloy strength and heat resistance. However, the content of each of these elements is preferably 0.01% or more. On the contrary, if the content of each of these elements exceeds the above range, the alloy strength decreases and the alloy becomes brittle. Especially, Fe0.1 ~
1.0% and Mn 0.1-1.0% are preferable.

In the compressor scroll having spiral teeth on the pedestal, the teeth are formed substantially at right angles to the pedestal, and the curvature of the root of the pedestal and the end corners of the teeth. Has a curvature of 0.1 to 0.5 mm, and preferably has an elongation at room temperature of 1% or more, and particularly an elongation percentage of 2% or more. The wall thickness can be set to 1 to 5 mm, and the thickness can be set to 0.015 to 0.05 mm for a scroll outer diameter of 1 mm. In particular, it is preferable that the outer diameter is 1 mm and the wall thickness is 0.02 to 0.04 mm. The height of the teeth is 0 per 1 mm of the outer diameter of the scroll.
The thickness is preferably 1 to 0.3 mm, particularly 0.15 to 0.25 mm.

[0029]

【Example】

Example 1 As an Al-based alloy base material, the chemical composition (% by weight) shown in Table 1
B390, JISAC8A or ADC12 equivalent material, and rapidly solidified powder containing 15% or 25% of Si having the chemical composition shown in Table 2 are used as a solution using a sintered alloy produced by the sintering hot forging method. After the treatment, aging treatment was performed at 160 ° C. for 10 hours to prepare a disc-shaped wear test piece having a diameter of 30 mm and a height of 15 mm.

[0030]

[Table 1]

[0031]

[Table 2]

These samples were connected to the anode of a DC constant power supply circuit, the aluminum electrode was used as the cathode, and the electrolytic solution (sulfuric acid:
180 g / l, dissolved aluminum: 5 g / l, nickel sulfate: 5 g / l, acrylic resin composition: 14 g / l, balance: water) while maintaining the electrolyte at 5 ° C., about 1.5 A / d
A constant current having a current density of m ² was applied to produce a test piece in which the anodized layer was impregnated with acrylic resin. Next, this test piece was treated with sulfuric acid: 0.4 g / l, boric acid: 25 g / l, and silver salt: 15 g.
While maintaining the electrolytic solution at 10 ° C, connect the test piece and the carbon electrode to an AC power source in an electrolytic solution of 1 / l aqueous solution.
Electrolysis was performed at a voltage of 0 V, and the acrylic resin impregnated in the anodized layer was eluted and replaced with a metal to deposit and impregnate silver in the voids to obtain a test piece. Next, as a test method, a pressure vessel was attached to a Suzuki abrasion tester, and a fixed piece (fixed scroll material side) and a movable piece (orbiting scroll material side) in the pressure vessel were attached and tested. Test condition is sliding speed: 4m /
s, seizure test, surface pressure: 10 kg / cm ² , test time: 20
The seizure surface pressure was determined while the load was increased stepwise by holding for minutes. The amount of wear was measured by reducing the surface pressure: 20 kg / cm ² and the test time: 8 hours, and the friction coefficient was compared by using the data obtained in the wear test. Next, the atmospheric conditions were: lubricating oil: synthetic oil for refrigerator, CFC: R22, and mixing ratio of lubricating oil and refrigerant was 3: 7.

FIG. 1 shows the results of the friction and wear test. As is clear from FIG. 1, the seizure surface pressure of the cast iron homogenous combination of the comparative materials is 170 to 180 kg / cm ² , and the Al alloy (B39
0) When the same kind and anodization are combined, 120 to 13
Indicates 0 kg / cm ² . Further, the amount of wear is large, and in particular, the combination of an Al alloy and an anodized Al alloy is characterized in that the untreated wear of the Al alloy increases. The friction coefficient is 0.060 to 0.060 in the same kind of cast iron, but it is as high as 0.085 to 0.105 in the combination of Al alloys. In comparison with these, the seizure surface pressure is 210 to 24 in the present invention.
It shows 0 kg / cm ² , the wear amount is smaller than that of the comparative material, and the friction coefficient is as low as 0.037 to 0.042, showing that the combination is excellent. Therefore, when applied to a real machine,
It has less mechanical loss than conventional combinations and can contribute to energy saving.

The above Al sintered alloy was manufactured as follows. As the powder, the molten metal was rapidly cooled by the gas atomizing method using air to produce each alloy powder. A powder having a particle size of 350 mesh or less was used. The powder of each composition range was 3.6 ton / cm using the cold isostatic pressing method (CIP).
^It was molded under a pressure of ^2, the sintering temperature was 480 ° C., and the sintering time was 120 minutes. 7 after sintering at 350 ° C
After regeneration pressure molding at ton / cm ² , the solution treatment was maintained at 490 ° C. for 30 minutes and then cooled with water. After that, aging treatment was performed at 160 ° C. for 20 hours. Sintering was performed in a vacuum of 10 ⁻³ mmHg.

The sintered alloys obtained were used for tensile tests,
Test pieces for bending test (thickness 5 mm, width 20 mm, length 40 mm) and impact test were processed, and tensile test, three-point support bending test and 5 kg Charpy impact test were performed. The Al-Si-Ce based sintered alloy according to the present invention has a tensile strength equal to or higher than that of the alloy containing no Zr and Ce, and the impact value is 25% Si.
And a ^{39kg-m / cm 2 0.82kg-} m / cm 2 or more with respect to the bending strength was 90 kg / mm ² or more with respect to 72kg / mm ^2.

Since the surface treatment temperature is low, the deformation is small,
Since the surface roughness was small, there was no need for post-processing.

Embodiment 2 FIG. 2 is a sectional view of a main part of a scroll compressor for a room air conditioner. The compression mechanism of this scroll compressor is composed of a fixed scroll 1, an orbiting scroll 2, an Oldham ring 4, a crankshaft 3, a main bearing 5 and an auxiliary bearing 5, and the crankshaft is press-fitted into a rotor 7 of a motor.

When the crankshaft 3 rotates, it is driven by the orbiting scroll 2 via the Oldham ring 4. Spiral blades (called wrap) on a flat plate (called end plate)
The fixed scroll 1 and the orbiting scroll 2 having the above are combined by shifting the phases of both wraps by 180 degrees. Both laps are involute curves, and four orbiting scrolls 2 and fixed scrolls 1 simultaneously form four crescent-shaped closed spaces (compression chambers). These closed spaces are larger at the outer circumference and smaller at the center, and have a suction chamber at the outer circumference and a discharge port at the center of the fixed scroll 1. The orbiting scroll 2 compresses gas by orbiting and rotating clockwise while maintaining the orbiting radius set so that the wraps come into contact with each other. However, if wear occurs between the fixed scroll 1 and the orbiting scroll 2 during compression, the compressed gas leaks, causing a drop in efficiency. Cast iron (FC25) as the fixed scroll material of the present invention and 25Si shown in Table 2
-Al alloy and an Al alloy impregnated with anodic oxidation + silver, and orbiting scroll materials of 25Si-Al alloy and Al alloy impregnated with anodic oxidation + silver were combined and mounted, and an actual machine test was conducted. The test conditions were: rotation speed: 5200 rpm, discharge gas pressure:
30 kg / cm ² , test time: 500 hr, lubricating oil: synthetic oil for refrigerator, refrigerant: R22. For comparison, the same test was performed on a combination of fixed scroll: cast iron and orbiting scroll: cast iron (Luberite). Table 3 shows the amount of wear of the fixed and orbiting scroll wrap tips after the test. From these results, it was revealed that the material combination of the present invention has a smaller amount of wear than the comparative material and is a good combination.

[0039]

[Table 3]

25Si-A for fixed and orbiting scroll material
The same test was carried out for the case where the anodic oxide layer was impregnated with resin by using the 1-alloy, but the abrasion amount was larger than that of the case where the anodic oxide layer was impregnated with metal. However, less results were obtained than the comparative material.

Example 3 The compressor shown in FIG. 2 is used for home or commercial use, 80 to 130 mmφ for domestic use and 200 to 300 mm for commercial use.
A φ scroll is used.

The orbiting scroll 1 and the fixed scroll 2 shown in FIG. 2 were manufactured from the 25% Si-Al sintered alloy shown in Example 2. 70 ~ powder less than 100 mesh
80% mold molding, degassing in vacuum at 480 ° C, 40
Sinter forging was performed to 95% or more at 0 ° C., then upset forging was performed at 400 ° C., and scroll molding was performed at 400 ° C. with a die. The height of the teeth was 15 mm and the thickness was 2.7 mm. The diameter of the orbiting scroll was about 80 mm, and the teeth were almost straight without taper. The curvature of the root of the tooth was set to 0.5 mm. Then, similarly, solution heat treatment (490 ° C ×
After water cooling for 30 minutes and aging treatment (160 ° C. × 20 hours), the product was finished by machining. The fixed scroll is slightly larger than the orbiting scroll, and they rotate and come into contact with each other with a slight gap and slide. Even in the fixed scroll, the curvature of the root of the tooth portion was set to 0.5 mm. The gap is 1
It became 0 to 20 μm. Tooth thickness is 0.03 per 1 mm outer diameter
It has 4 mm, and it is 0.18 mm per 1 mm of tooth height. The height of the teeth is 0.19 mm per 1 mm of the outer diameter of the scroll. Both scrolls thus obtained were subjected to a process of anodic oxidation using silver tetrafluoride instead of the acrylic resin on the entire surface in the same manner as in Example 1 and then impregnating with silver.
The thickness of the oxide film was about 40 μm.

By using this sintered alloy, the formability at high temperature was extremely good, the swelling at the center of the tooth portion of the scroll was good, and the entire tooth portion could be formed. The particle size distribution of Si particles was the same as described above. Further, it has been found that by using the alloy of the present invention, its ductility is high, so that there is no problem even if the curvature of the rising portion of the tooth portion is small, and as a result, highly efficient compression can be obtained. The intermetallic compounds could not be clearly distinguished by a microscope. In particular, the initial familiarity between the two is good, and in the room air conditioner, it is possible to perform a quick start by using an inverter and to generate hot air within 2 minutes. The amount of wear was smaller than that of the Al sintered alloy shown in Example 2.

[0044]

According to the present invention, the amount of wear between fixed and orbiting scroll parts is extremely small, leakage is small, and efficiency is improved. Further, the friction coefficient is small and the durability is remarkably improved, so that compression with high energy saving can be obtained.

[Brief description of drawings]

FIG. 1 is a bar graph showing the results of wear amount and friction coefficient by a wear test.

FIG. 2 is a cross-sectional view of a scroll compressor.

[Explanation of symbols]

1 ... Fixed scroll, 2 ... Orbiting scroll, 3 ... Crank shaft, 4 ... Oldham ring, 5 ... Main bearing, 6 ... Sub bearing,
7 ... rotor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Chizaki 4026 Kuji Town, Hitachi City, Ibaraki Prefecture Hitachi Research Laboratory, Hitachi Co., Ltd. (72) Inventor Keiichi Nakamura, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd., Production Engineering Laboratory, Hitachi, Ltd. Kyowa Industry Co., Ltd.

Claims (10)

[Claims] 1. A compressor provided with a fixed scroll and an orbiting scroll, wherein the scroll is composed of an Al-based alloy of the same kind or an iron-based material, and an anode is provided on at least an outer peripheral surface of the scroll composed of the Al-based alloy. A scroll compressor in which an oxide layer is formed, and a metal and a synthetic resin are filled in the voids in the anodized layer. 2. The scroll compressor according to claim 1, wherein the anodized layer is formed by an acidic first electrolytic solution containing a low polymerization acrylic resin composition. 3. The anodized layer according to claim 1 or 2, wherein the anodized layer is electrolyzed with a second electrolytic solution containing a metal salt, and a part or all of the resin filled in the voids in the anodized layer is metalized. Scroll compressor impregnated with replacement. 4. The scroll compressor according to claim 1, wherein the anodized layer contains a solid lubricant. 5. The method according to claim 1, wherein the A
A scroll compressor, wherein the thickness of the anodized layer of the 1-based alloy member is 60 μm or less. 6. A scroll compressor according to claim 1, wherein an acrylic resin or ethylene tetrafluoride (PTFE) is embedded in the voids of the anodized layer. 7. The method according to claim 1, wherein the A
The scroll compressor, wherein the anodic oxide layer formed on the l-based alloy has voids filled with silver. 8. A scroll compressor according to claim 1, wherein an atomic radius of the metal in the anodized layer is 4Å or less. 9. A scroll compressor according to claim 1, wherein the solid lubricant comprises at least one of molybdenum disulfide, tungsten disulfide, boron boride and graphite. 10. The A according to claim 1,
The l-based alloy is, by weight, 1 to 45% Si, and a Group IIIa element 0.1.
-20%, at least one IVa group element and Va group element at 0.01 to 5%, and the balance being a molten alloy or a sintered alloy substantially consisting of Al. A scroll compressor.