Scroll compressor and refrigerating device

Abstract

To reduce the weight of a turning scroll without significantly changing the design of a scroll compressor, and reduce vibration occurring during the operation of the scroll compressor.SOLUTION: A scroll compressor (10) comprises a fixed scroll (40), and a turning scroll (50). The turning scroll (50) is a single member. The material of the turning scroll (50) is an aluminum composite material containing an aluminum alloy, and a reinforcing material made of ceramics.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a scroll compressor and a refrigeration device. [Background technology]

[0002] Patent Document 1 discloses a scroll compressor. The scroll compressor includes a fixed scroll and an orbiting scroll. The fixed scroll and the orbiting scroll form a compression chamber. The orbiting scroll is connected to an electric motor via a drive shaft. The orbiting scroll is driven to revolve by the electric motor. The rotation of the orbiting scroll is regulated by an Oldham coupling. The scroll compressor draws a gas to be compressed (such as a gas refrigerant or air) into the compression chamber and compresses it by revolving the orbiting scroll. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-124219 Summary of the Invention [Problem to be solved by the invention]

[0004] The fixed scroll and the orbiting scroll are typically made of iron-based materials such as carbon steel and cast iron. Reducing the mass of the orbiting scroll is an effective way to reduce the vibrations that occur during operation of the scroll compressor. One possible way to reduce the mass of the orbiting scroll is to change the material of the orbiting scroll from an iron-based material to an aluminum alloy, which has a lower density than iron-based materials.

[0005] However, the strength of iron-based materials and aluminum alloys differs significantly, so changing the material of the orbiting scroll from an iron-based material to an aluminum alloy requires a significant change in the shape (wall thickness, etc.) of the orbiting scroll.

[0006] Furthermore, the linear expansion coefficients of iron-based materials and aluminum alloys are significantly different. Therefore, if the fixed scroll remains made of iron-based material, the clearance between the fixed scroll and the orbiting scroll must be increased. If the clearance between the fixed scroll and the orbiting scroll is increased, measures to prevent gas leakage from the compression chamber (for example, the addition of a tip seal) will be necessary.

[0007] An object of the present disclosure is to reduce the weight of the orbiting scroll without significantly changing the design of the scroll compressor, and to reduce vibrations that occur during operation of the scroll compressor. [Means for solving the problem]

[0008] A first aspect of the present disclosure is a scroll compressor (10) including a fixed scroll (40) and an orbiting scroll (50), wherein the orbiting scroll (50) is a single member and is made of an aluminum composite material containing an aluminum alloy and a reinforcing material made of ceramics.

[0009] In the first aspect, an aluminum composite material is used as the material for the orbiting scroll (50). The aluminum composite material contains an aluminum alloy and a ceramic reinforcing material. The aluminum composite material has a higher strength and a lower linear expansion coefficient than an aluminum alloy. Therefore, compared to an aluminum alloy, the aluminum composite material is closer to an iron-based material in both strength and linear expansion coefficient. This allows the weight of the orbiting scroll (50) to be reduced without significantly changing the design of the scroll compressor (10), thereby reducing vibrations that occur during operation of the scroll compressor (10).

[0010] A second aspect of the present disclosure is the first aspect, wherein the orbiting scroll (50) has an oxide coating (57) formed by anodizing.

[0011] In the second aspect, the orbiting scroll (50) is subjected to anodizing, and as a result, an oxide film (57) is formed on the orbiting scroll (50). This improves the sliding properties between the orbiting scroll (50) and other components, and reduces the possibility of problems such as seizure of the orbiting scroll (50).

[0012] A third aspect of the present disclosure is the first or second aspect, wherein the aluminum composite material contains aluminum borate as the reinforcing material.

[0013] In the third embodiment, the aluminum composite material that is the material of the orbiting scroll (50) contains an aluminum alloy and aluminum borate that is a reinforcing material.

[0014] A fourth aspect of the present disclosure is the aluminum composite material according to the first or second aspect, wherein the aluminum composite material contains silicon carbide as the reinforcing material.

[0015] In the fourth embodiment, the aluminum composite material that is the material of the orbiting scroll (50) contains an aluminum alloy and silicon carbide that is a reinforcing material.

[0016] A fifth aspect of the present disclosure is any one of the first to fourth aspects, further comprising an Oldham coupling (60) that restricts the rotation of the orbiting scroll (50), and the Oldham coupling (60) is made of an iron-based material containing iron as a main component.

[0017] In the fifth embodiment, the Oldham coupling (60) is made of an iron-based material.

[0018] A sixth aspect of the present disclosure is any one of the first to fourth aspects, further comprising an Oldham coupling (60) that restricts rotation of the orbiting scroll, wherein the Oldham coupling (60) is made of aluminum or an aluminum alloy, and the Oldham coupling (60) has a plating layer (64) formed by electroless nickel plating surface treatment.

[0019] In the sixth aspect, the Oldham coupling (60) is made of aluminum or an aluminum alloy. Therefore, the mass of the Oldham coupling (60) is reduced compared to when the Oldham coupling (60) is made of an iron-based material, and vibrations occurring during operation of the scroll compressor (10) are reduced. Furthermore, the Oldham coupling (60) is subjected to electroless nickel plating surface treatment, and as a result, a plating layer (64) is formed on the Oldham coupling (60). Therefore, sliding performance between the Oldham coupling (60) and the orbiting scroll (50) is improved, and the possibility of problems such as seizure of the Oldham coupling (60) is reduced.

[0020] A seventh aspect of the present disclosure is any one of the first to sixth aspects, wherein the fixed scroll (40) is made of an iron-based material containing iron as a main component.

[0021] In the seventh aspect, an iron-based material is used as the material of the fixed scroll (40). The aluminum composite material, which is the material of the orbiting scroll (50), has a linear expansion coefficient closer to that of an iron-based material than that of an aluminum alloy. Therefore, the clearance between the orbiting scroll (50) and the fixed scroll (40) can be made to the same extent as when the orbiting scroll (50) is made of an iron-based material. As a result, the sealing between the orbiting scroll (50) and the fixed scroll (40) can be ensured without taking any new measures, and the performance of the scroll compressor (10) can be maintained.

[0022] An eighth aspect of the present disclosure is a refrigeration system (100) including a refrigerant circuit (110) that circulates a refrigerant to perform a refrigeration cycle, and the scroll compressor (10) of any one of the first to seventh aspects is provided in the refrigerant circuit (110).

[0023] In an eighth aspect, any one of the first to seventh scroll compressors (10) is provided in a refrigerant circuit (110) of a refrigeration system (100). [Brief explanation of the drawings]

[0024] [Figure 1]FIG. 1 is a piping diagram showing the configuration of an air conditioner according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view showing a vertical section of the scroll compressor according to the embodiment. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III of FIG. [Figure 4] FIG. 4 is a perspective view of an orbiting scroll of the scroll compressor. [Figure 5] FIG. 5 is a cross-sectional view showing a part of a cross section of the orbiting scroll. [Figure 6] FIG. 6 is a perspective view of an Oldham coupling of a scroll compressor. [Figure 7] FIG. 7 is a cross-sectional view showing a part of a cross section of an Oldham coupling. DETAILED DESCRIPTION OF THE INVENTION

[0025] An embodiment will be described below. The embodiment is an air conditioner (100) including a scroll compressor (10). The air conditioner (100) is a refrigeration system that operates in a refrigeration cycle.

[0026] -Air conditioner- As shown in Fig. 1, the air conditioner (100) includes an outdoor unit (120) and an indoor unit (130). The outdoor unit (120) and the indoor unit (130) are connected to each other via a pair of communication pipes (111). In the air conditioner (100), the outdoor unit (120), the indoor unit (130), and the communication pipe (111) form a refrigerant circuit (110) that performs a vapor compression refrigeration cycle.

[0027] <Outdoor unit> The outdoor unit (120) is installed outdoors and includes a scroll compressor (10), a four-way switching valve (122), an outdoor heat exchanger (123), an outdoor fan (125), an expansion valve (124), a liquid-side shut-off valve (126), and a gas-side shut-off valve (127).

[0028] The scroll compressor (10) is a hermetic compressor. The scroll compressor (10) draws in and compresses low-pressure refrigerant, and discharges the compressed, high-pressure refrigerant (high-pressure refrigerant). Details of the scroll compressor (10) will be described later.

[0029] The four-way switching valve (122) is a valve for switching the flow of refrigerant in the refrigerant circuit (110). The four-way switching valve (122) is switched between a first state shown by a solid line in FIG. 1 and a second state shown by a dashed line in FIG. 2. The outdoor heat exchanger (123) is a heat exchanger that exchanges heat between the refrigerant and outdoor air. The outdoor heat exchanger (123) is, for example, a fin-and-tube heat exchanger. The outdoor fan (125) is a fan that supplies outdoor air to the outdoor heat exchanger (123). The expansion valve (124) is an electrically operated expansion valve with a variable opening.

[0030] <Indoor unit> The indoor unit (130) is installed in a room that is a space to be air-conditioned. The indoor unit (130) includes an indoor heat exchanger (132) and an indoor fan (131). The indoor heat exchanger (132) is a heat exchanger that exchanges heat between a refrigerant and indoor air. The indoor heat exchanger (132) is, for example, a fin-and-tube heat exchanger. The indoor fan (131) is a fan that supplies indoor air to the indoor heat exchanger (132).

[0031] <Driving operation> The air conditioner (100) selectively performs cooling operation and heating operation.

[0032] In the cooling operation, the four-way selector valve (122) is set to the first state, and the refrigerant circulates in the refrigerant circuit (110). In the refrigerant circuit (110), the outdoor heat exchanger (123) functions as a radiator, and the indoor heat exchanger (132) functions as an evaporator. The indoor unit (130) cools air drawn in from the indoor space in the indoor heat exchanger (132) and blows the cooled air into the indoor space.

[0033] In the heating operation, the four-way selector valve (122) is set to the second state, and the refrigerant circulates in the refrigerant circuit (110). In the refrigerant circuit (110), the indoor heat exchanger (132) functions as a radiator, and the outdoor heat exchanger (123) functions as an evaporator. The indoor unit (130) heats air drawn in from the indoor space in the indoor heat exchanger (132) and blows the heated air into the indoor space.

[0034] -Overall configuration of scroll compressor- 2, the scroll compressor (10) is a hermetic compressor in which a compression mechanism (30) and an electric motor (20) are housed in a casing (11) that is a hermetic container. The scroll compressor (10) of this embodiment draws in and compresses refrigerant in a refrigerant circuit (110).

[0035] The casing (11) is a cylindrical pressure vessel with closed ends. The casing (11) is installed with its axial direction aligned vertically. An intake pipe (12) is provided at the upper end of the casing (11) for introducing refrigerant from the refrigerant circuit (110) into the compression mechanism (30). The casing (11) also has a discharge pipe (13) for discharging the refrigerant from the casing (11) to the outside. Lubricating oil for lubricating the compression mechanism (30) and other components is stored at the bottom of the casing (11).

[0036] The electric motor (20) is disposed inside the casing (11) below the compression mechanism (30). The electric motor (20) and the compression mechanism (30) are connected by a drive shaft (25). The electric motor (20) includes a stator (21) and a rotor (22). The stator (21) of the electric motor (20) is fixed to the casing (11). The rotor (22) of the electric motor (20) is attached to the drive shaft (25).

[0037] The drive shaft (25) includes a main shaft portion (26) and an eccentric shaft portion (27). The main shaft portion (26) has an axial center that coincides with the axial center of the drive shaft (25). The rotor (22) of the electric motor (20) is attached to the main shaft portion (26). An upper portion of the rotor (22) of the main shaft portion (26) is supported by a bearing portion (36) of the compression mechanism (30) (described later), and a lower portion of the rotor (22) is supported by a lower bearing member (15) (described later). The eccentric shaft portion (27) is formed in a relatively short shaft shape and protrudes from the upper end of the main shaft portion (26). The axial center of the eccentric shaft portion (27) is substantially parallel to the axial center of the main shaft portion (26) and is eccentric with respect to the axial center of the main shaft portion (26).

[0038] A lower bearing member 15 is provided in the lower portion of the casing 11. The lower bearing member 15 is fixed to the casing 11. The lower bearing member 15 constitutes a journal bearing that rotatably supports the main shaft portion 26 of the drive shaft 25.

[0039] -Compression mechanism configuration- The compression mechanism (30) includes a housing (35), a fixed scroll (40), an orbiting scroll (50), and an Oldham coupling (60). The housing (35) is fixed to the casing (11). The fixed scroll (40) is disposed on the upper surface of the housing (35). The orbiting scroll (50) is disposed between the fixed scroll (40) and the housing (35).

[0040] <housing> The housing (35) is a thick, disk-shaped member with a recess in the center. The housing (35) is also formed with a bearing portion (36). The bearing portion (36) is a cylindrical portion that protrudes downward. The bearing portion (36) constitutes a journal bearing that rotatably supports the main shaft portion (26) of the drive shaft (25).

[0041] Although not shown, a keyway is formed in the housing 35. This keyway is a recessed groove that opens to the top surface of the housing 35. A fixed-side key 63 of the Oldham coupling 60, which will be described later, fits into the keyway of the housing 35.

[0042] The housing 35 is made of an iron-based material containing iron as a main component, such as FC250.

[0043] Fixed Scroll 2 and 3, the fixed scroll (40) includes a fixed end plate (41), a fixed wrap (42), and an outer circumferential wall (43). In the fixed scroll (40), the fixed end plate (41), the fixed wrap (42), and the outer circumferential wall (43) are integrally formed and inseparable. The fixed end plate (41), the fixed wrap (42), and the outer circumferential wall (43) are made of the same material.

[0044] The fixed side wrap 42 is formed in the shape of a spiral wall that describes an involute curve, and protrudes from the front surface (the lower surface in FIG. 1 ) of the fixed side end plate 41. The outer peripheral wall 43 is formed so as to surround the outer periphery of the fixed side wrap 42, and protrudes from the front surface of the fixed side end plate 41. The tip surface of the fixed side wrap 42 and the tip surface of the outer peripheral wall 43 are approximately flush with each other.

[0045] The compression mechanism (30) of this embodiment has an asymmetric wrap structure in which the fixed-side wrap (42) is longer than the orbiting-side wrap (54) of the orbiting scroll (50), which will be described later. As indicated by the two-dot chain line in Fig. 2, the outermost portion of the fixed-side wrap (42) is integrated with the outer peripheral wall portion (43).

[0046] The fixed scroll (40) is made of an iron-based material containing iron as a main component, such as FC250.

[0047] The fixed scroll 40 may be subjected to a surface treatment for improving wear resistance. Examples of such surface treatments include manganese phosphate treatment to form an oxide film, dimple treatment to form fine irregularities on the sliding surface, laser hardening to increase surface hardness, and surface treatment to form a solid lubricating film.

[0048] <Rotating Scroll> As shown in FIGS. 2 to 4, the orbiting scroll (50) includes an orbiting-side end plate (51), an orbiting-side wrap (54), and a boss (55). The orbiting scroll (50) is a single member. Therefore, the orbiting-side end plate (51), the orbiting-side wrap (54), and the boss (55) are integrally formed and cannot be separated. The orbiting-side end plate (51), the orbiting-side wrap (54), and the boss (55) are made of the same material.

[0049] The orbiting-side head plate portion (51) is formed in a generally circular, flat plate shape. The orbiting-side head plate portion (51) has a front surface (52) (upper surface in FIG. 2) and a back surface (53) (lower surface in FIG. 2). The orbiting-side wrap (54) is formed in the shape of a spiral wall that describes an involute curve and protrudes from the front surface (52) of the orbiting-side head plate portion (51). The boss portion (55) is formed in a cylindrical shape and is disposed in the center of the back surface (53) of the orbiting-side head plate portion (51). The eccentric shaft portion (27) of the drive shaft (25) is inserted into the boss portion (55).

[0050] A keyway 56 is formed in the orbiting-side end plate 51 of the orbiting scroll 50. The keyway 56 is a recessed groove that opens to the back surface 53 of the orbiting-side end plate 51. The keyways 56 are arranged one on each side of the center of the orbiting-side end plate 51 at positions facing each other. An orbiting-side key 62 of an Oldham coupling 60, which will be described later, is fitted into the keyway 56.

[0051] The orbiting scroll 50 is made of an aluminum composite material and is formed by cutting a workpiece made of the aluminum composite material.

[0052] The aluminum composite material from which the orbiting scroll 50 is made contains an aluminum alloy and a ceramic reinforcing material. This aluminum composite material is formed by supplying a molten aluminum alloy matrix material to the ceramic reinforcing material and then impregnating the matrix material into the reinforcing material under high pressure. The aluminum composite material from which the orbiting scroll 50 is made in this embodiment contains aluminum borate as the reinforcing material.

[0053] As shown in Fig. 5, the orbiting scroll (50) has an oxide film (57). The oxide film (57) is formed by subjecting the orbiting scroll (50) to anodizing. The oxide film (57) is formed on the orbiting scroll (50) in order to improve sliding properties with other components.

[0054] In this embodiment, the entire surface of the orbiting scroll (50) is covered with the oxide film (57). However, the oxide film (57) may be formed so as to cover only a portion of the surface of the orbiting scroll (50). For example, the oxide film (57) may be formed only on the portion of the orbiting scroll (50) that slides against other components (the fixed scroll (40) and / or the Oldham coupling (60)).

[0055] Oldham coupling As shown in Figure 6, the Oldham coupling (60) includes one ring portion (61), a pair of orbiting keys (62), and a pair of fixed-side keys (63). The Oldham coupling (60) is a single member. Therefore, the orbiting keys (62) and the fixed-side keys (63) are formed integrally with the ring portion (61) and are inseparable from the ring portion (61). The ring portion (61), the orbiting keys (62), and the fixed-side keys (63) are made of the same material.

[0056] The ring portion (61) is formed in a generally annular shape. The ring portion (61) has a first surface (61a) and a second surface (61b). The first surface (61a) and the second surface (61b) are each flat surfaces that are perpendicular to the central axis of the ring portion (61). The first surface (61a) and the second surface (61b) of the ring portion (61) are substantially parallel to each other.

[0057] The turning-side key (62) is a small rectangular parallelepiped piece extending in the radial direction of the ring portion (61). The turning-side key (62) is formed so as to protrude from the first surface (61a) of the ring portion (61). The pair of turning-side keys (62) are arranged on a line passing through the center of the ring portion (61) and face each other across the central axis of the ring portion (61).

[0058] The fixed-side keys (63) are small rectangular parallelepiped pieces extending in the radial direction of the ring portion (61). The fixed-side keys (63) are formed so as to protrude from the second surface (61b) of the ring portion (61). The pair of fixed-side keys (63) are arranged on a line passing through the center of the ring portion (61) and face each other across the central axis of the ring portion (61). The positions of the pair of fixed-side keys (63) are shifted by 90° in the circumferential direction of the ring portion (61) from the positions of the pair of turning-side keys (62).

[0059] The Oldham coupling (60) is disposed between the orbiting scroll (50) and the housing (35) and restricts the rotation of the orbiting scroll (50). The orbiting-side key (62) of the Oldham coupling (60) fits into a key groove (56) formed in the orbiting-side end plate portion (51) of the orbiting scroll (50) and slides against the side wall surface of the key groove (56). The fixed-side key (63) of the Oldham coupling (60) fits into a key groove formed in the housing (35) and slides against the side wall surface of the key groove.

[0060] The Oldham coupling 60 is made of aluminum or an aluminum alloy, and an example of the material for the Oldham coupling 60 is a high-silicon aluminum alloy.

[0061] As shown in Fig. 7, the Oldham coupling 60 has a plated layer 64. This plated layer 64 is formed by subjecting the Oldham coupling 60 to electroless nickel plating surface treatment. This plated layer 64 is formed on the Oldham coupling 60 for the purpose of improving sliding properties with other components.

[0062] In the present embodiment, the entire surface of the Oldham coupling 60 is covered with the plating layer 64. However, the plating layer 64 may be formed so as to cover only a portion of the surface of the Oldham coupling 60. For example, the plating layer 64 may be formed only on the portion of the Oldham coupling 60 that slides against other components (the orbiting scroll 50 and / or the housing 35).

[0063] (Compression chamber, etc.) 2 and 3, the orbiting-side wrap (54) of the orbiting scroll (50) meshes with the fixed-side wrap (42) of the fixed scroll (40). In the compression mechanism (30), a compression chamber (31) is formed that is surrounded by the fixed-side end plate (41) and the fixed-side wrap (42) of the fixed scroll (40) and the orbiting-side end plate (51) and the orbiting-side wrap (54) of the orbiting scroll (50).

[0064] An intake port (44) is formed in the outer peripheral wall (43) of the fixed scroll (40). The downstream end of the intake pipe (12) is connected to the intake port (44). A discharge port (45) is formed in the center of the fixed end plate (41) of the fixed scroll (40) and passes through the fixed end plate (41).

[0065] A high-pressure chamber (46) is formed in the center of the back surface (top surface in FIG. 2) of the fixed-side end plate portion (41). The high-pressure chamber (46) is a space that communicates with the discharge port (45). The high-pressure chamber (46) communicates with the space below the housing (35) in the casing (11) via a passage (not shown).

[0066] -Operation of scroll compressor- In the scroll compressor (10), the orbiting scroll (50) of the compression mechanism (30) is driven by the electric motor (20) to revolve. The orbiting scroll (50) of this embodiment revolves clockwise in FIG.

[0067] When the orbiting scroll (50) moves, the refrigerant that has flowed from the suction pipe (12) into the suction port (44) is sucked into the compression chamber (31). When the orbiting scroll (50) moves, the volume of the compression chamber (31) decreases accordingly, and the refrigerant in the compression chamber (31) is compressed. The compressed refrigerant is discharged from the compression chamber (31) through the discharge port (45) into the high-pressure chamber (46). The refrigerant that has flowed into the high-pressure chamber (46) flows into the space below the housing (35) in the casing (11) and then flows out of the casing (11) through the discharge pipe (13).

[0068] -Features of the embodiment (1)- In the scroll compressor (10) of this embodiment, an aluminum composite material is used as the material for the orbiting scroll (50). The aluminum composite material contains an aluminum alloy and a ceramic reinforcing material. In particular, the aluminum composite material used for the orbiting scroll (50) of this embodiment contains aluminum borate as a reinforcing material.

[0069] The aluminum composite material that is the material of the orbiting scroll (50) of this embodiment has a density comparable to that of an aluminum alloy, but has a higher strength and a lower coefficient of linear expansion than an aluminum alloy.

[0070] In particular, the strength of the aluminum composite material used for the orbiting scroll (50) of this embodiment is relatively similar to that of the iron-based material used for the fixed scroll (40). Therefore, the design values ​​for the dimensions of the orbiting scroll (50), such as the thickness and height of the orbiting-side wrap (54) and the thickness of the orbiting-side end plate (51), can be made the same as those of a typical orbiting scroll made of an iron-based material.

[0071] In addition, when comparing the linear expansion coefficients of the aluminum composite material, which is the material of the orbiting scroll (50) of this embodiment, and the iron-based material, which is the material of the fixed scroll (40), the two are relatively close to each other. Therefore, the design value of the clearance between the orbiting scroll (50) and the fixed scroll (40) can be reduced to the same level as when the orbiting scroll is made of an iron-based material, and the airtightness of the compression chamber (31) can be ensured without adding a tip seal.

[0072] Therefore, according to this embodiment, the weight of the orbiting scroll (50) can be reduced without significantly changing the design of the scroll compressor (10), and vibrations occurring during operation of the scroll compressor (10) can be reduced.

[0073] -Features of the embodiment (2)- In the scroll compressor (10) of this embodiment, the orbiting scroll (50) has an oxide film (57) formed by anodizing. The Oldham coupling (60) has a plating layer (64) formed by electroless nickel plating. Therefore, according to this embodiment, when an aluminum composite material is used as the orbiting scroll (50), it is possible to reduce the possibility of problems such as seizure between components of the scroll compressor (10), thereby improving the reliability of the scroll compressor (10).

[0074] -Modification 1 of the embodiment- In the scroll compressor (10) of this embodiment, the aluminum composite material from which the orbiting scroll (50) is made contains a ceramic reinforcing material. The ceramic used as the reinforcing material is not limited to aluminum borate. For example, the aluminum composite material from which the orbiting scroll (50) is made may contain silicon carbide as a reinforcing material. Furthermore, the aluminum composite material from which the orbiting scroll (50) is made may contain multiple types of ceramics as reinforcing materials.

[0075] -Modification 2 of the embodiment- In the scroll compressor (10) of this embodiment, the Oldham coupling (60) may be made of an iron-based material containing iron as a main component, such as FC250.

[0076] The Oldham coupling 60 may be subjected to a surface treatment for the purpose of improving wear resistance. Examples of such surface treatments include manganese phosphate treatment to form an oxide film, dimple treatment to form fine irregularities on the sliding surface, laser hardening to increase surface hardness, and surface treatment to form a solid lubricating film.

[0077] -Modification 3 of the embodiment- The refrigeration system in which the scroll compressor (10) of the present embodiment is provided is not limited to the air conditioner (100). The refrigeration system in which the scroll compressor (10) of the present embodiment is provided may be a refrigerator that cools the air inside a refrigerator or a reefer container, or a chiller that cools a heat medium such as water.

[0078] Although the embodiments and modifications have been described above, it will be understood that various modifications in form and detail are possible without departing from the spirit and scope of the claims. Furthermore, elements of the above embodiments, modifications, and other embodiments may be combined or substituted as appropriate. Furthermore, the terms "first," "second," etc. in the specification and claims are used to distinguish between terms to which these terms are attached, and do not limit the number or order of those terms. [Industrial Applicability]

[0079] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for scroll compressors and refrigeration devices. [Explanation of symbols]

[0080] 10 Scroll compressor 40 Fixed Scroll 50 Swivel Scroll 57 Oxide film 60 Oldham coupling 64 plating layer 100 Air conditioners (refrigeration units) 110 Refrigerant circuit

Claims

1. A scroll compressor (10) including a fixed scroll (40) and an orbiting scroll (50), The orbiting scroll (50) is a single member, The material of the orbiting scroll (50) is an aluminum composite material containing an aluminum alloy and a ceramic reinforcing material. Scroll compressor.

2. The orbiting scroll (50) has an oxide film (57) formed by anodizing. The scroll compressor according to claim 1 .

3. The aluminum composite material contains aluminum borate as the reinforcing material. The scroll compressor according to claim 1 or 2.

4. The aluminum composite material contains silicon carbide as the reinforcing material. The scroll compressor according to claim 3.

5. an Oldham coupling (60) that restricts the rotation of the orbiting scroll (50); The material of the Oldham coupling (60) is an iron-based material whose main component is iron. The scroll compressor according to claim 1 or 2.

6. an Oldham coupling (60) that restricts the rotation of the orbiting scroll; The material of the Oldham coupling (60) is aluminum or an aluminum alloy, The Oldham coupling (60) has a plating layer (64) formed by electroless nickel plating surface treatment. The scroll compressor according to claim 1 or 2.

7. The fixed scroll (40) is made of an iron-based material containing iron as a main component. The scroll compressor according to claim 1 or 2.

8. a refrigerant circuit (110) that circulates a refrigerant to perform a refrigeration cycle; The scroll compressor (10) according to claim 1 or 2 is provided in the refrigerant circuit (110). Refrigeration equipment.

Images