Compressor and refrigeration device

Abstract

A compressor (10) comprises a first member (101) and a second member (102) that slides on the first member (101). The material of the first member (101) is: an aluminum composite material containing an aluminum alloy and a reinforcing material made of aluminum borate; or an aluminum alloy containing silicon. A resin coating (100) is formed on the sliding surface of the second member (102) that slides on the first member (101). The resin coating (100) is mainly composed of a fluororesin and a polyamide-imide resin.

Description

Compressor and Refrigeration Device

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

[0002] Patent Document 1 discloses a scroll compressor including a fixed scroll and a movable scroll (swing scroll). The movable scroll is disposed between the fixed scroll and the housing and supported by the housing. When the movable scroll is rotationally driven, refrigerant is sucked into the compression chamber and compressed.

[0003] Japanese Patent Application Laid-Open No. 2019-124219

[0004] By the way, in order to reduce vibrations generated during the operation of the compressor, it is conceivable to change the material of the first member (for example, the movable scroll), which is a movable member, from an iron-based material to an aluminum alloy to reduce the mass of the first member.

[0005] However, when the second member (for example, the housing as a support member) that slides with the first member is made of an iron-based material, the sliding surface of the first member may wear because the strength of the iron-based material and the aluminum alloy is significantly different.

[0006] An object of the present disclosure is to reduce the weight of the first member and ensure the strength of the first member.

[0007] A first aspect of the present disclosure is a compressor including a first member (101) and a second member (102) that slides with the first member (101). The material of the first member (101) is an aluminum composite material containing an aluminum alloy and a reinforcing material made of aluminum borate, or an aluminum alloy containing silicon. A resin film (100) is formed on the sliding surface of the second member (102) with the first member (101). The resin film (100) mainly contains a fluororesin and a polyamideimide resin.

[0008] In the first embodiment, by making the material of the first member (101) an aluminum composite material containing an aluminum alloy and a reinforcing material made of aluminum borate, or an aluminum alloy containing silicon, the weight of the first member (101) can be reduced while ensuring the strength of the first member (101).

[0009] A second aspect of the present disclosure is the compressor of the first aspect, wherein the material of the first member (101) is the aluminum alloy containing silicon, and the silicon component ratio contained in the aluminum alloy is 10% by mass or more and 20% by mass or less.

[0010] In the second embodiment, the sliding properties of the sliding surface can be improved by setting the silicon content ratio in the aluminum alloy to 10% by mass or more and 20% by mass or less.

[0011] A third aspect of the present disclosure is a compressor according to the first or second aspect, wherein the material of the first member (101) is the aluminum alloy containing silicon, and the resin coating (100) is such that the component ratio of the polyamide-imide resin in the main component of the resin coating (100) is 40% by mass or more and 45% by mass or less.

[0012] In the third embodiment, by setting the component ratio of polyamide-imide resin in the main component of the resin coating (100) to 40% by mass or more, it is possible to suppress deterioration of the adhesion of the resin coating (100) to the second member (102).

[0013] Furthermore, by setting the component ratio of polyamide-imide resin in the main component of the resin coating (100) to 45% by mass or less, it is possible to suppress the deterioration of the sliding surface's lubricity due to a decrease in the component ratio of fluororesin. In addition, it is possible to suppress the increase in wear of the first member (101) due to the hardness of the resin coating (100) becoming higher than that of the first member (101).

[0014] A fourth aspect of the present disclosure is the compressor of the first aspect, wherein the material of the first member (101) is the aluminum composite material, and the resin coating (100) is such that the component ratio of the polyamide-imide resin in the main component of the resin coating (100) is 40% by mass or more and 50% by mass or less.

[0015] In the fourth embodiment, by setting the component ratio of polyamide-imide resin in the main component of the resin coating (100) to 40% by mass or more, it is possible to suppress deterioration of the adhesion of the resin coating (100) to the second member (102).

[0016] Furthermore, by setting the component ratio of polyamide-imide resin in the main component of the resin coating (100) to 50% by mass or less, it is possible to suppress the deterioration of the sliding surface's lubricity due to a decrease in the component ratio of fluororesin. In addition, it is possible to suppress the increase in wear of the first member (101) due to the hardness of the resin coating (100) becoming higher than that of the first member (101).

[0017] A fifth aspect of the present disclosure is a compressor according to any one of the first to fourth aspects, wherein the fluororesin comprises polytetrafluoroethylene and a tetrafluoroethylene-hexafluoropropylene copolymer resin, wherein the mass proportion of the tetrafluoroethylene-hexafluoropropylene copolymer resin is greater than the mass proportion of the polytetrafluoroethylene.

[0018] In the fifth embodiment, the quality of the fluororesin can be stabilized by making the mass ratio of the tetrafluoroethylene-hexafluoropropylene copolymer resin greater than the mass ratio of polytetrafluoroethylene.

[0019] A sixth aspect of the present disclosure is a compressor of any one of the first to fifth aspects, comprising: a fixed scroll (55) having a fixed-side lap (58); a movable scroll (50) having a movable-side lap (52) that engages with the fixed-side lap (58); and a support member (46) that supports the movable scroll (50) and the thrust load from the movable scroll (50), wherein the first member (101) is the movable scroll (50), the second member (102) is the support member (46), and the resin coating (100) is formed on the sliding surface of the support member (46).

[0020] In the sixth embodiment, the weight of the movable scroll (50) can be reduced while ensuring the strength of the movable scroll (50). Furthermore, by forming a resin coating (100) on the sliding surface of the support member (46), the sliding properties of the sliding surface of the support member (46) can be ensured, thereby improving the reliability of the sliding surface.

[0021] A seventh aspect of this disclosure is a refrigeration system comprising a compressor (10) of any one of the first to sixth aspects.

[0022] In a seventh embodiment, a refrigeration system equipped with a compressor (10) can be provided.

[0023] Figure 1 is a refrigerant circuit diagram showing the configuration of the refrigeration system of this embodiment 1. Figure 2 is a longitudinal cross-sectional view showing the configuration of the scroll compressor. Figure 3 is a side cross-sectional view showing the configuration of the thrust ring. Figure 4 is a graph showing the relationship between the polyamide-imide content and the adhesion of the resin coating to the thrust ring made of iron-based material. Figure 5 is a graph showing the relationship between the polyamide-imide content and the wear depth of the aluminum composite material. Figure 6 is a graph showing the relationship between the polyamide-imide content and the wear depth of the high-silicon aluminum alloy in this embodiment 2.

[0024] <Embodiment 1> As shown in Figure 1, the scroll compressor (10) is installed in the refrigeration device (1). The refrigeration device (1) has a refrigerant circuit (1a) filled with refrigerant. The refrigerant circuit (1a) has a scroll compressor (10), a heat sink (3), a pressure reducing mechanism (4), and an evaporator (5). The pressure reducing mechanism (4) is, for example, an expansion valve. The refrigerant circuit (1a) performs a vapor compression type refrigeration cycle.

[0025] The refrigeration system (1) is an air conditioning system. The air conditioning system may be a cooling-only unit, a heating-only unit, or an air conditioning system that switches between cooling and heating. In this case, the air conditioning system has a switching mechanism (e.g., a four-way switching valve) that switches the direction of refrigerant circulation. The refrigeration system (1) may also be a water heater, a chiller unit, a cooling system that cools the air inside a storage area, etc. The cooling system cools the air inside a refrigerator, freezer, container, etc.

[0026] As shown in Figure 2, the scroll compressor (10) includes a casing (11). The casing (11) is formed as a vertically elongated, cylindrical, sealed container. Inside the casing (11), from bottom to top, are arranged in the following order: a lower bearing member (30), an electric motor (35), and a compression mechanism (40). Inside the casing (11) is a drive shaft (20) that extends in the vertical direction.

[0027] The interior of the casing (11) is divided into a first chamber (12) and a second chamber (13) by the fixed scroll (55) of the compression mechanism (40). The first chamber (12) is the space above the fixed scroll (55). The second chamber (13) is the space below the fixed scroll (55).

[0028] An intake pipe (14) is attached to the body of the casing (11). The intake pipe (14) communicates with the second chamber (13) of the casing (11). A discharge pipe (15) is attached to the upper end of the casing (11). The discharge pipe (15) communicates with the first chamber (12) of the casing (11).

[0029] The drive shaft (20) has a main shaft portion (21), a flange portion (22), and an eccentric portion (23). The main shaft portion (21) penetrates the housing (41) of the compression mechanism (40). An upper bearing (42) is provided in the housing (41). The main shaft portion (21) is supported by the housing (41) via the upper bearing (42).

[0030] The flange portion (22) is provided at the upper end of the main shaft portion (21). The flange portion (22) is formed in the shape of a disc with a larger diameter than the main shaft portion (21). The eccentric portion (23) protrudes upward from the upper surface of the flange portion (22). The eccentric portion (23) is formed in the shape of a cylinder with a smaller diameter than the main shaft portion (21). The axis of the eccentric portion (23) is eccentric with respect to the axis of the main shaft portion (21).

[0031] A vertically extending oil supply passage (24) is formed inside the drive shaft (20). An oil supply pump (not shown) is provided at the lower end of the main shaft portion (21). Oil stored at the bottom of the casing (11) is drawn up by the oil supply pump and sent to the oil supply passage (24). The oil that has passed through the oil supply passage (24) is supplied to the compression mechanism (40), etc.

[0032] A slide bush (25) is attached to the drive shaft (20). The slide bush (25) is placed on the flange portion (22). The slide bush (25) has a cylindrical portion (26) and a balance weight portion (27). The eccentric portion (23) of the drive shaft (20) is rotatably inserted into the cylindrical portion (26).

[0033] The lower bearing member (30) is positioned in the second chamber (13) of the casing (11). The lower bearing member (30) is fixed to the housing (41) by bolts (32). The lower bearing member (30) rotatably supports the main shaft portion (21) of the drive shaft (20) via the lower bearing (31).

[0034] The electric motor (35) has a stator (36) and a rotor (37). The stator (36) is fixed to the housing (41) together with a lower bearing member (30) by bolts (32). The rotor (37) is fixed to the main shaft portion (21) of the drive shaft (20).

[0035] The compression mechanism (40) includes a fixed scroll (55), a housing (41), a movable scroll (50) as a first member (101), and a thrust ring (46) as a second member (102). In the compression mechanism (40), a compression chamber (45) is formed by engaging the fixed-side wrap (58) of the fixed scroll (55) with the movable-side wrap (52) of the movable scroll (50).

[0036] The fixed scroll (55) has a fixed-side flat plate portion (56), an edge portion (57), and a fixed-side wrap (58).

[0037] The fixed-side flat plate portion (56) is formed in a slightly thick disc shape. A discharge port (59) is formed in the center of the fixed-side flat plate portion (56). The discharge port (59) penetrates the fixed-side flat plate portion (56). The discharge port (59) connects the compression chamber (45) and the first chamber (12).

[0038] The edge portion (57) is formed in a wall-like shape that extends downward from the peripheral edge portion of the fixed-side flat plate portion (56). The lower end of the edge portion (57) abuts against the housing (41).

[0039] The fixed scroll (55) is secured to the housing (41) by bolts (44). The edge (57) of the fixed scroll (55) is in close contact with the casing (11), thereby dividing the inside of the casing (11) into a first chamber (12) and a second chamber (13).

[0040] The fixed-side wrap (58) is erected on the lower side of the fixed-side flat plate portion (56). The fixed-side wrap (58) is formed integrally with the fixed-side flat plate portion (56). The fixed-side wrap (58) is formed in the shape of a spiral wall with a constant height.

[0041] The movable scroll (50) has a movable flat plate portion (51), a movable lap (52), and a protruding portion (53). The movable flat plate portion (51) is formed in the shape of a slightly thick disc. The protruding portion (53) is formed in the shape of a cylinder.

[0042] The movable side wrap (52) is erected on the upper side of the movable side flat plate (51). The movable side wrap (52) is formed integrally with the movable side flat plate (51). The movable side wrap (52) is formed in the shape of a spiral wall with a constant height. By interlocking the movable side wrap (52) and the fixed side wrap (58), a compression chamber (45) is formed.

[0043] The protruding portion (53) is positioned approximately in the center of the lower surface of the movable flat plate portion (51). The cylindrical portion (26) of the slide bush (25) is inserted into the protruding portion (53). In other words, the movable scroll (50) engages with the eccentric portion (23) of the drive shaft (20) via the slide bush (25).

[0044] The material of the movable scroll (50) is an aluminum composite material containing an aluminum alloy and a reinforcing material made of aluminum borate. The aluminum composite material is formed, for example, by supplying a matrix material, which is a molten aluminum alloy, to a reinforcing material made of ceramics and impregnating the reinforcing material with the matrix material under high pressure.

[0045] The movable scroll (50) is placed on the housing (41) via the thrust ring (46). As shown in FIG. 3, the thrust ring (46) is formed in a ring shape with flat upper and lower surfaces.

[0046] The thrust ring (46) constitutes a support member that supports the thrust load from the movable scroll (50). The thrust ring (46) is made of, for example, an iron-based material such as carbon steel or cast iron.

[0047] The thrust ring (46) has a stepped portion (47) and an engagement hole (48). The stepped portion (47) is formed by recessing the inner peripheral edge portion on the lower surface of the thrust ring (46). A plurality of engagement holes (48) are formed at intervals in the circumferential direction on the lower surface of the thrust ring (46).

[0048] On the upper surface of the thrust ring (46), the outer peripheral edge portion and the inner peripheral edge portion are chamfered. A resin coating (100) is formed on the sliding surface (the upper surface in FIG. 2) of the thrust ring (46) with respect to the movable scroll (50). The resin coating (100) will be described later.

[0049] The thrust ring (46) is placed on the upper surface of the housing (41) (see FIG. 2). In this state, the protrusion (49) protruding from the upper surface of the housing (41) is fitted into the stepped portion (47) and the engagement hole (48) of the thrust ring (46).

[0050] The thrust ring (46) is disposed between the movable-side flat plate portion (51) of the movable scroll (50) and the housing (41). The upper surface of the thrust ring (46) on which the resin coating (100) is formed serves as a sliding surface that slides against the lower surface of the movable-side flat plate portion (51).

[0051] -Operation- The operation of the scroll compressor (10) will be described below. As shown in Figure 2, the movable scroll (50) is rotated by rotating the drive shaft (20) with the electric motor (35).

[0052] The low-pressure gaseous refrigerant drawn into the scroll compressor (10) flows through the suction pipe (14) into the second chamber (13) of the casing (11). The gaseous refrigerant is drawn into the compression chamber (45) from the outer periphery of the movable side wrap (52) and the fixed side wrap (58).

[0053] As the movable scroll (50) rotates, the volume of the enclosed compression chamber (45) decreases, and the gaseous refrigerant inside the compression chamber (45) is compressed. The compressed, high-pressure gaseous refrigerant then flows into the first chamber (12) through the discharge port (59), and is subsequently discharged from the scroll compressor (10) through the discharge pipe (15).

[0054] Thus, in the compression mechanism (40), the refrigerant in the compression chamber (45) is compressed, and the gas pressure in the compression chamber (45) increases accordingly. As a result, a load acts on the movable scroll (50) in a direction that pulls it away from the fixed scroll (55), i.e., a downward thrust load (axial load). The downward thrust load from the movable scroll (50) is supported by a thrust ring (46) that is mounted on the housing (41) and slides against the movable scroll (50).

[0055] <Composition of the resin coating> In this embodiment, in order to reduce vibrations that occur during the operation of the scroll compressor (10), the movable scroll (50) is made of an aluminum composite material to reduce the mass of the movable scroll (50).

[0056] However, if the thrust ring (46) that slides against the movable scroll (50) is made of an iron-based material, the sliding surface of the movable scroll (50) may wear down because the strength of the iron-based material and the aluminum composite material differ significantly.

[0057] Therefore, in this embodiment, a resin coating (100) is formed on the sliding surface of the thrust ring (46). This ensures the smoothness of the sliding surface of the thrust ring (46) and improves the reliability of the sliding surface between the movable scroll (50) and the thrust ring (46).

[0058] The resin coating (100) is formed on the upper surface of the thrust ring (46) by, for example, a coating step of applying a resin material to the upper surface of the thrust ring (46), a firing step of heating the thrust ring (46) to which the resin material has been applied, and a polishing step of lapping the surface of the coating.

[0059] The resin coating (100) is mainly composed of fluororesin and polyamide-imide resin. By utilizing the properties of polyamide-imide resin, which has excellent impact resistance, a resin coating (100) that is highly impact-resistant and resistant to peeling can be formed on the sliding surface of the thrust ring (46). In addition, since polyamide-imide resin also has the property of high hardness, the resin coating (100) is relatively hard and resistant to wear.

[0060] The resin coating (100) has a component ratio of polyamide-imide resin in its main components of the resin coating (100) of 40% by mass or more and 50% by mass or less. In other words, the main components of the resin coating (100) consist of fluororesin at 50% by mass or more and 60% by mass or less, and polyamide-imide resin at 40% by mass or more and 50% by mass or less.

[0061] Here, fluororesin is used to improve the lubricity of the sliding surface. Polyamide-imide resin is used to improve the adhesion of the resin coating (100) to the substrate thrust ring (46) and to improve the hardness of the coating.

[0062] In the graph in Figure 4, the horizontal axis represents the component ratio (content) of polyamide-imide resin in the main component of the resin coating (100). The vertical axis represents the adhesion of the resin coating (100) to the iron-based material thrust ring (46) which is the base material.

[0063] As can be seen from the graph in Figure 4, when the polyamide-imide content is 40% by mass or more, the adhesion of the resin coating (100) to the thrust ring (46) is stable. In other words, the resin coating (100) is less likely to peel off from the thrust ring (46).

[0064] Therefore, in this embodiment, the component ratio of polyamide-imide resin in the main component of the resin coating (100) is set to 40% by mass or more.

[0065] Furthermore, in the graph of Figure 5, the horizontal axis shows the component ratio (content) of polyamide-imide resin in the main component of the resin coating (100). The vertical axis shows the wear depth of the aluminum composite material, which is the material of the movable scroll (50).

[0066] As can be seen from the graph in Figure 5, the wear depth of the aluminum composite material increases sharply when the polyamide-imide content is 50% by mass or more.

[0067] Specifically, as the proportion of polyamide-imide resin increases, the proportion of fluororesin decreases, and the friction-reducing effect of fluororesin diminishes. As a result, the coefficient of friction increases rapidly, and the wear depth of the aluminum composite material also increases rapidly.

[0068] Furthermore, the hardness of the aluminum composite material is lower than that of the iron-based material. This difference in material hardness becomes even greater when the movable scroll (50) and thrust ring (46) slide against each other and generate heat during the operation of the scroll compressor (10). As a result, the hardness of the resin coating (100) becomes greater than that of the aluminum composite material, leading to increased wear on the aluminum composite material.

[0069] Therefore, in this embodiment, the component ratio of polyamide-imide resin in the main component of the resin coating (100) is set to 50% by mass or less.

[0070] In this way, by setting the component ratio of polyamide-imide resin in the main component of the resin coating (100) to 40% by mass or more and 50% by mass or less, the adhesion of the resin coating (100) to the thrust ring (46) is stabilized, making the resin coating (100) less likely to peel off, and the wear depth of the movable scroll (50) made of aluminum composite material can be reduced.

[0071] Here, the fluororesin in the main component of the resin coating (100) includes polytetrafluoroethylene (PTFE) and tetrafluoroethylene-hexafluoropropylene copolymer resin (FEP). In the fluororesin, the mass proportion of tetrafluoroethylene-hexafluoropropylene copolymer resin is greater than the mass proportion of polytetrafluoroethylene.

[0072] The resin coating (100) contains, in addition to its main components of fluororesin and polyamide-imide resin, pigments such as carbon as colorants and other additives.

[0073] The amount of such additives added is set to such an extent that it does not adversely affect the performance of the resin coating (100) or its adhesion to the thrust ring (46). For example, the amount of carbon as an additive should be set to 3% by mass or less of the fluororesin. Preferably, it should be set to 1% by mass or less, and more preferably 0.5% by mass or less.

[0074] -Effects of Embodiment 1- According to this embodiment, by making the material of the first member (101) an aluminum composite material containing an aluminum alloy and a reinforcing material made of aluminum borate, it is possible to reduce the weight of the first member (101) while ensuring the strength of the first member (101).

[0075] Furthermore, by forming a resin coating (100) on the sliding surface of the second member (102), the sliding properties of the sliding surface of the second member (102) can be ensured, thereby improving the reliability of the sliding surface.

[0076] According to this embodiment, by setting the component ratio of polyamide-imide resin in the main component of the resin coating (100) to 40% by mass or more, it is possible to suppress deterioration of the adhesion of the resin coating (100) to the second member (102).

[0077] Furthermore, by setting the component ratio of polyamide-imide resin in the main component of the resin coating (100) to 50% by mass or less, it is possible to suppress the deterioration of the sliding surface's lubricity due to a decrease in the component ratio of fluororesin. In addition, it is possible to suppress the increase in wear of the first member (101) due to the hardness of the resin coating (100) becoming higher than that of the first member (101).

[0078] According to this embodiment, the quality of the fluororesin can be stabilized by making the mass ratio of the tetrafluoroethylene-hexafluoropropylene copolymer resin greater than the mass ratio of polytetrafluoroethylene.

[0079] According to this embodiment, the weight of the movable scroll (50) can be reduced while ensuring the strength of the movable scroll (50). Furthermore, by forming a resin coating (100) on the sliding surface of the support member (46), the sliding properties of the sliding surface of the support member (46) can be ensured, thereby improving the reliability of the sliding surface.

[0080] According to this embodiment, a refrigeration system equipped with a compressor (10) can be provided.

[0081] <Embodiment 2> Hereinafter, the same reference numerals will be used for parts that are the same as in Embodiment 1, and only the differences will be described.

[0082] In the first embodiment described above, as shown in Figure 2, the material of the movable scroll (50) as the first member (101) was an aluminum composite material containing an aluminum alloy and a reinforcing material made of aluminum borate. In contrast, in the second embodiment, the material of the movable scroll (50) as the first member (101) was an aluminum alloy containing silicon.

[0083] Here, the silicon content in the aluminum alloy is 10% by mass or more and 20% by mass or less. Preferably, the silicon content in the aluminum alloy is 12% by mass or more and 15% by mass or less.

[0084] Furthermore, if the material of the first member (101) is an aluminum alloy containing silicon, the resin coating (100) has a component ratio of polyamide-imide resin in its main component that is 40% by mass or more and 45% by mass or less.

[0085] Here, the resin coating (100) is mainly composed of fluororesin and polyamide-imide resin. In other words, the main components of the resin coating (100) are fluororesin at a concentration of 55% by mass or more and 60% by mass or less, and polyamide-imide resin at a concentration of 40% by mass or more and 45% by mass or less.

[0086] In the graph of Figure 6, the horizontal axis shows the component ratio (content) of polyamide-imide resin in the main component of the resin coating (100). The vertical axis shows the wear depth of the silicon-containing aluminum alloy, which is the material of the movable scroll (50). In the graph of Figure 6, the wear depth of an aluminum composite material is shown as a dashed line as a comparative example. In the following explanation, the silicon-containing aluminum alloy will be referred to as high-silicon aluminum alloy.

[0087] As can be seen from the graph in Figure 6, the wear depth of the high-silicon aluminum alloy increases sharply when the polyamide-imide content is 45% by mass or more.

[0088] Specifically, as the proportion of polyamide-imide resin increases, the proportion of fluororesin decreases, and the friction-reducing effect of fluororesin diminishes. As a result, the coefficient of friction increases rapidly, and the wear depth of the high-silicon aluminum alloy also increases rapidly.

[0089] Furthermore, the hardness of high-silicon aluminum alloy is lower than that of iron-based materials. This difference in material hardness becomes even greater when the movable scroll (50) and thrust ring (46) slide against each other and generate heat during the operation of the scroll compressor (10). As a result, the hardness of the resin coating (100) becomes greater than that of the high-silicon aluminum alloy, leading to increased wear on the high-silicon aluminum alloy.

[0090] Therefore, in this embodiment, the component ratio of polyamide-imide resin in the main component of the resin coating (100) is set to 45% by mass or less.

[0091] In this way, by setting the component ratio of polyamide-imide resin in the main component of the resin coating (100) to 40% by mass or more and 45% by mass or less, the adhesion of the resin coating (100) to the thrust ring (46) is stabilized, making the resin coating (100) less likely to peel off, and the wear depth of the movable scroll (50) made of high-silicon aluminum alloy can be reduced.

[0092] -Effects of Embodiment 2- According to this embodiment, by setting the silicon component ratio in the aluminum alloy to 10% by mass or more and 20% by mass or less, the lubricity of the sliding surface can be improved.

[0093] According to this embodiment, by setting the component ratio of polyamide-imide resin in the main component of the resin coating (100) to 40% by mass or more, it is possible to suppress deterioration of the adhesion of the resin coating (100) to the second member (102).

[0094] Furthermore, by setting the component ratio of polyamide-imide resin in the main component of the resin coating (100) to 45% by mass or less, it is possible to suppress the deterioration of the sliding surface's lubricity due to a decrease in the component ratio of fluororesin. In addition, it is possible to suppress the increase in wear of the first member (101) due to the hardness of the resin coating (100) becoming higher than that of the first member (101).

[0095] 《Other Embodiments》 In this embodiment, a thrust ring (46) is provided, and the thrust load from the movable scroll (50) is supported by the thrust ring (46). However, the embodiment is not limited to this configuration.

[0096] For example, the thrust load from the movable scroll (50) may be directly supported by the housing (41) without providing a thrust ring (46). In this case, the resin coating (100) may be formed on the upper surface of the housing (41) on the portion that slides against the movable side flat plate portion (51) of the movable scroll (50).

[0097] Furthermore, although a resin coating (100) is formed on the upper surface of the thrust ring (46) in this embodiment, the invention is not limited to this form, and a resin coating (100) may be formed on the sliding surface between the movable scroll (50) and the fixed scroll (55).

[0098] For example, a resin coating (100) may be formed on the portion of the fixed-side wrap (58) of the fixed scroll (55) that slides against the movable-side flat plate portion (51) of the movable scroll (50).

[0099] Although embodiments and modifications have been described above, it will be understood that various changes in form and details are possible without departing from the spirit and scope of the claims. Furthermore, elements of the embodiments, modifications, and other embodiments described above may be combined or substituted as appropriate. In addition, the designations "first," "second," "third," etc. in the specification and claims are used to distinguish the phrases to which these designations are attached, and do not limit the number or order of such phrases.

[0100] As explained above, this disclosure is useful for compressors and refrigeration equipment.

[0101] 1 Refrigeration unit 10 Compressor 46 Thrust ring (support member) 50 Movable scroll 52 Movable side wrap 55 Fixed scroll 58 Fixed side wrap 100 Resin coating 101 First member 102 Second member

Claims

1. A compressor comprising a first member (101) and a second member (102) that slides with the first member (101), wherein the material of the first member (101) is an aluminum composite material containing an aluminum alloy and a reinforcing material made of aluminum borate, or an aluminum alloy containing silicon, and a resin coating (100) is formed on the sliding surface of the second member (102) with the first member (101), and the resin coating (100) mainly consists of a fluororesin and a polyamide-imide resin.

2. The compressor according to claim 1, wherein, in the case where the material of the first member (101) is the aluminum alloy containing silicon, the component ratio of silicon contained in the aluminum alloy is 10% by mass or more and 20% by mass or less.

3. In the compressor according to claim 1 or 2, if the material of the first member (101) is the aluminum alloy containing silicon, the resin coating (100) is a compressor in which the component ratio of the polyamide-imide resin in the main component of the resin coating (100) is 40% by mass or more and 45% by mass or less.

4. The compressor according to claim 1, wherein the material of the first member (101) is the aluminum composite material, and the resin coating (100) is such that the component ratio of the polyamide-imide resin in the main component of the resin coating (100) is 40% by mass or more and 50% by mass or less.

5. A compressor according to any one of claims 1 to 4, wherein the fluororesin comprises polytetrafluoroethylene and a tetrafluoroethylene-hexafluoropropylene copolymer resin, and the mass proportion of the tetrafluoroethylene-hexafluoropropylene copolymer resin is greater than the mass proportion of the polytetrafluoroethylene.

6. A compressor according to any one of claims 1 to 5, comprising: a fixed scroll (55) having a fixed side wrap (58); a movable scroll (50) having a movable side wrap (52) that engages with the fixed side wrap (58); and a support member (46) that supports the movable scroll (50) and the thrust load from the movable scroll (50), wherein the first member (101) is the movable scroll (50), the second member (102) is the support member (46), and the resin coating (100) is formed on the sliding surface of the support member (46).

7. A refrigeration apparatus comprising any one compressor (10) according to claims 1 to 6.

Images