Scroll compressor

Abstract

This scroll compressor comprises: a housing; a frame; a fixed scroll; an orbiting scroll including a boss part; an eccentric part that can be inserted into the boss part; a shaft including an oil flow path; a bearing member which can be coupled to the shaft, rotates together with the shaft, and includes a boss accommodation groove into which the boss part can be inserted; a first bearing between the frame and the bearing member; and a second bearing which is between the boss part and the eccentric part, and which is disposed such that at least a portion thereof overlaps the first bearing in the radial direction of the first bearing. The frame includes an oil discharge path by which the oil in the boss accommodation groove is discharged through the side surface of the frame, wherein the oil discharge path is formed to pass through at least a portion of the frame on the basis that the eccentric part is inserted into the boss part.

Description

Scroll compressor

[0001] The present disclosure relates to a scroll compressor.

[0002] A scroll compressor is a compressor that includes a fixed scroll having a fixed wrap and a rotary scroll having a rotary wrap corresponding to the wrap of the fixed scroll, and forms a compression chamber that moves continuously between the fixed wrap and the rotary wrap while the rotary scroll rotates relative to the fixed scroll to suck in and compress refrigerant.

[0003] Since these scroll compressors perform suction, compression, and discharge continuously, they have superior advantages over other types of compressors in terms of vibration and noise generated during operation.

[0004] Scroll compressors can be used in various technical fields and products. For example, scroll compressors can be used as compressors in air conditioners.

[0005] One aspect of the present disclosure provides a scroll compressor with improved efficiency by reducing flow loss caused by oil contacting a rotating structure.

[0006] One aspect of the present disclosure provides a scroll compressor with improved efficiency by improving the oil discharge path.

[0007] The technical problems to be solved in this document are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this invention belongs from the description below.

[0008] A scroll compressor according to the present disclosure comprises a housing, a frame fixed to the inside of the housing, a fixed scroll that can be fixed to the inside of the housing and coupled to the frame, a pivoting scroll that is arranged to pivot relative to the fixed scroll and includes a boss portion, an eccentric portion that can be inserted into the boss portion to transmit rotational force to the boss portion, a shaft that includes an oil passage, a bearing member that can be coupled to the shaft and is arranged to rotate together with the shaft, the bearing member that includes a boss receiving groove into which the boss portion can be inserted, a first bearing that rotatably supports the bearing member between the frame and the bearing member, and a second bearing that rotatably supports the eccentric portion between the boss portion and the eccentric portion, wherein the second bearing is arranged such that at least a portion overlaps with the first bearing in the radial direction of the first bearing. The frame includes an oil discharge passage that allows oil from the boss receiving groove to be discharged to the side of the frame, and the oil discharge passage is formed by penetrating at least a portion of the frame based on the eccentric portion being inserted into the boss portion.

[0009] FIG. 1 is a perspective view of a scroll compressor according to one embodiment.

[0010] FIG. 2 is a cross-sectional view of a scroll compressor according to one embodiment.

[0011] Figure 3 illustrates an enlarged view of A in Figure 2.

[0012] FIG. 4 illustrates a disassembled view of a part of a scroll compressor according to one embodiment.

[0013] FIG. 5 is a bottom perspective view of a frame in a scroll compressor according to one embodiment.

[0014] FIG. 6 is a drawing showing an enlarged view of a portion of the inside of the housing in a scroll compressor according to one embodiment.

[0015] FIG. 7 is a cross-sectional view of a scroll compressor according to one embodiment.

[0016] Figure 8 illustrates an enlarged view of B in Figure 7.

[0017] FIG. 9 is a cross-sectional view of a scroll compressor according to one embodiment.

[0018] Figure 10 illustrates an enlarged view of C in Figure 9.

[0019] The embodiments described in this specification and the configurations illustrated in the drawings are merely preferred examples of the disclosed invention, and various modifications that may replace the embodiments and drawings of this specification may exist at the time of filing this application.

[0020] Additionally, the same reference numerals or symbols presented in each drawing of this specification represent parts or components that perform substantially the same function.

[0021] Additionally, the singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0022] Additionally, in this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0023] Additionally, the terms "part," "module," and "component" may be implemented in hardware or software. Depending on the embodiments, a plurality of "parts," "modules," and "components" may be implemented as a single component, or a single "part," "module," or "component" may include a plurality of components.

[0024] Furthermore, the terms used in this specification are for describing embodiments and are not intended to limit or / or restrict the disclosed invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0025] Additionally, terms including ordinal numbers, such as "first," "second," etc., used herein may be used to describe various components, but said components are not limited by said terms, and said terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" includes a combination of a plurality of related described items or any one of a plurality of related described items.

[0026] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0027] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0028] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0029] Meanwhile, terms such as "up-and-down direction" and "front-and-back direction" used in the following description are defined based on the drawings, and the shape and position of each component are not limited by these terms.

[0030] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0031] FIG. 1 is a perspective view of a scroll compressor according to one embodiment.

[0032] Referring to FIG. 1, the scroll compressor (1) may include a housing (10). The housing (10) may form the exterior of the scroll compressor (1). The housing (10) may be referred to by other terms such as casing, case, or body.

[0033] The housing (10) may form a sealed space inside. The housing (10) may be formed as a sealed container. The housing (10) may include a refrigerant inlet into which a refrigerant inlet pipe (14) is inserted or connected. The housing (10) may include a refrigerant outlet into which a refrigerant outlet pipe (15) is inserted or connected. Refrigerant may flow into the housing (10) through the refrigerant inlet pipe (14). Refrigerant inside the housing (10) may be discharged to the outside of the housing (10) through the refrigerant outlet pipe (15).

[0034] According to one embodiment, a scroll compressor (1) may be installed in an outdoor unit of an air conditioner. The scroll compressor (1) may form a refrigeration cycle together with a condenser, an expansion valve, and an evaporator. A refrigerant inlet pipe (14) may be connected to an evaporator, and a refrigerant outlet pipe (15) may be connected to a condenser.

[0035] The housing (10) may include a cylindrical main body (11) with an open top and bottom surface, and an upper cap (12) and a lower cap (13) mounted respectively on the upper and lower parts of the main body (11) to seal the interior of the main body (11). The connection between the main body (11), the upper cap (12), and the lower cap (13) may be sealed so that the interior of the housing (10) is sealed.

[0036] Low temperature and low pressure refrigerant can be introduced through the refrigerant inlet pipe (14). The refrigerant can be introduced into the housing (10) through the refrigerant inlet pipe (14).

[0037] High-temperature and high-pressure refrigerant compressed by the compression part of the scroll compressor (1) can be discharged through the refrigerant discharge pipe (15). The refrigerant can be discharged outside the housing (10) through the refrigerant discharge pipe (15).

[0038] A base (16) supporting the housing (10) may be provided at the bottom of the housing (10). The base (16) may be coupled to the lower cap (13). The scroll compressor (1) may be installed vertically with respect to the bottom surface or support surface by means of the base (16).

[0039] FIG. 2 is a cross-sectional view of a scroll compressor according to one embodiment. FIG. 3 is an enlarged view of A in FIG. 2. FIG. 4 shows an exploded view of a part of the configuration of a scroll compressor according to one embodiment. FIG. 5 is a bottom perspective view of a frame in a scroll compressor according to one embodiment. FIG. 6 is an enlarged view of a part of the interior of a housing in a scroll compressor according to one embodiment.

[0040] Referring to FIGS. 2 to 6, a scroll compressor (1) according to one embodiment may include a housing (10), a frame (20), a fixed scroll (30), a pivot scroll (40), a shaft (50), and a driving motor (70).

[0041] The housing (10) forms the exterior of the scroll compressor (1) and may be a sealed container with a roughly cylindrical shape. A refrigerant inlet pipe (14) and a refrigerant outlet pipe (15) may each be connected to the housing (10).

[0042] The housing (10) can be formed by combining a main body (11), an upper cap (12), and a lower cap (13). Except for the inflow and outflow of refrigerant through the refrigerant inflow pipe (14) and the refrigerant outflow pipe (15), the interior of the housing (10) can be sealed. In other words, the interior of the housing (10) is sealed so that refrigerant can be introduced into the housing (10) only through the refrigerant inflow pipe (14) and refrigerant can be discharged outside the housing (10) only through the refrigerant outflow pipe (15).

[0043] A sump (17) for storing oil may be formed in the lower part of the housing (10). The sump (17) may refer to at least a portion of the lower space inside the housing (10). The oil stored in the sump (17) may be supplied to each bearing through the oil passage (53) described later.

[0044] The frame (20) may be installed inside the housing (10). The frame (20) may be installed to be fixed inside the housing (10). The frame (20) may be provided to support a fixed scroll (30) and a pivot scroll (40). The frame (20) may support the fixed scroll (30) so that the fixed scroll (30) is fixed inside the housing (10). The frame (20) may support the pivot scroll (40) so that the pivot scroll (40) can pivot relative to the frame (20) and the fixed scroll (30). A frame hole (21) may be formed in the frame (20) to allow a bearing member (60) to be inserted. The frame hole (21) may be formed by penetrating the center of the frame (20) in a vertical direction. The frame (20) may rotatably support the bearing member (60) so that the bearing member (60) rotates within the frame hole (21).

[0045] The fixed scroll (30) can be installed to be fixed inside the housing (10). The fixed scroll (30) can be fixed inside the housing (10) by being coupled to the frame (20). In other words, after the frame (20) is installed to be fixed inside the housing (10), the fixed scroll (30) can be coupled to the frame (20) fixed inside the housing (10). Through this, the fixed scroll (30) can be fixed inside the housing (10).

[0046] A fixed scroll (30) may be installed on the upper side of the frame (20). When the fixed scroll (30) is coupled to the frame (20), the lower surface of the fixed scroll (30) may be positioned to contact the upper surface of the frame (20). The fixed scroll (30) may be coupled to the frame (20) through a fastening member. For example, the fixed scroll (30) may be coupled to the frame (20) through a plurality of bolts spaced apart along the circumferential direction of the fixed scroll (30).

[0047] The fixed scroll (30) may include a wrap receiving portion (31), a flange portion (32) protruding radially along the perimeter of the wrap receiving portion (31), and a fixed wrap (34) provided in the internal space (33) of the wrap receiving portion (31). The wrap receiving portion (31) may have a container shape with at least a portion of its lower surface open. The internal space (33) may refer to the space inside the open lower surface of the wrap receiving portion (31).

[0048] The fixed wrap (34) may be formed by extending vertically downward from the upper surface (33a) of the internal space (33) of the wrap receiving portion (31). The fixed wrap (34) may be formed to have a spiral shape when viewed from below the fixed scroll (30). The height of the fixed wrap (34) may be provided at a constant level along the spiral shape. The height of the fixed wrap (34) may refer to the length in the vertical direction of the fixed wrap (34). The fixed wrap (34) may form a compression chamber (35) together with the pivot wrap (42) to be described later.

[0049] The pivot scroll (40) may be positioned below the fixed scroll (30). The pivot scroll (40) may be positioned above the frame (20). The pivot scroll (40) may be positioned in the space formed between the frame (20) and the fixed scroll (30). The pivot scroll (40) may be arranged to pivot relative to the frame (20) and the fixed scroll (30). The pivot scroll (40) may be supported by the thrust surface (22) of the frame (20).

[0050] The rotating scroll (40) may include a disc-shaped plate (41), a rotating wrap (42) formed protruding from one side of the plate (41), and a boss portion (43) formed protruding from the other side of the plate (41).

[0051] The plate (41) may be formed in the shape of a disc. The upper surface of the plate (41), which is provided to contact the fixed wrap (34) of the fixed scroll (30), may be formed as a mirror surface to minimize friction with the fixed wrap (34).

[0052] The pivot wrap (42) may be formed by extending vertically upward from the upper surface of the plate (41) or protruding upward. The pivot wrap (42) may be formed in a spiral shape. The pivot wrap (42) may be formed to have a spiral shape when viewed from above the pivot scroll (40). The height of the pivot wrap (42) may be provided at a constant level along the spiral shape. The height of the pivot wrap (42) may refer to the length in the vertical direction of the pivot wrap (42). The pivot wrap (42) may be formed to interlock with the fixed wrap (34). The upper surface of the plate (41), the pivot wrap (42), the fixed wrap (34), and the internal space (33) of the fixed scroll (30) may form a compression chamber (35). The plate (41) forming the compression chamber (35), the pivoting wrap (42), the fixed wrap (34), and the internal space (33) are collectively referred to as the compression section.

[0053] The fixed wrap (34) and the rotating wrap (42) can be accommodated in the wrap receiving portion (31) of the fixed scroll (30). In the internal space (33) of the wrap receiving portion (31), the fixed wrap (34) of the fixed scroll (30) and the rotating wrap (42) of the rotating scroll (40) can be engaged to form a compression chamber (35). The compression chamber (35) can be configured so that its volume gradually decreases due to the rotating movement of the rotating scroll (40). As a result, the refrigerant introduced into the compression chamber (35) can be compressed by the rotating movement of the rotating scroll (40).

[0054] The boss portion (43) may be formed by extending vertically downward from the lower surface of the plate (41) or protruding. The boss portion (43) may be formed at the center of the lower surface of the plate (41). A shaft (50) may be inserted into the internal space (43a) of the boss portion (43). More specifically, an eccentric portion (52) of the shaft (50) may be inserted into the internal space (43a) of the boss portion (43).

[0055] The lower surface of the plate (41) on which the boss portion (43) is formed can be supported by the thrust surface (22) of the frame (20). The lower surface of the plate (41) supported by the thrust surface (22) of the frame (20) can be formed as a mirror surface to minimize friction with the thrust surface (22).

[0056] The interlocked fixed wrap (34) and the pivoting wrap (42) can form a plurality of compression pockets. When the pivoting scroll (40) pivots, the plurality of compression pockets move toward the center of the wrap receiving portion (31), compressing the refrigerant introduced into the inlet of the fixed scroll (30) and discharging it through the outlet of the fixed scroll (30).

[0057] An Oldham ring (44) may be provided between the rotating scroll (40) and the frame (20) to prevent the rotating scroll (40) from rotating. The Oldham ring (44) prevents the rotating scroll (40) from rotating, thereby allowing the rotating scroll (40) to rotate relative to the frame (20) without rotating.

[0058] The pivot scroll (40) can pivot by means of a shaft (50). An eccentric portion (52) formed at the upper end of the shaft (50) can be coupled to a boss portion (43) of the pivot scroll (40). As the shaft (50) rotates by means of a drive motor (70), the pivot scroll (40) can pivot.

[0059] The drive motor (70) may include a stator (71) and a rotor (72). The stator (71) may be fixed to the inner surface of the housing (10). The rotor (72) may be rotatably provided inside the stator (71).

[0060] The shaft (50) can be inserted into the hollow of the rotor (72) such that at least a portion of the shaft (50) penetrates the rotor (72). The shaft (50) can be coupled to the rotor (72) to rotate together with the rotor (72). When the rotor (72) rotates by operating the drive motor (70), the shaft (50) can rotate together with the rotor (72).

[0061] The shaft (50) may include a main shaft (51) that is fitted into the rotor (72) and an eccentric part (52) provided on the upper part of the main shaft (51). The main shaft (51) of the shaft (50) may be fitted into the rotor (72) so as to rotate together with the rotor (72). The central axis of the main shaft (51) and the central axis of the eccentric part (52) may be spaced apart from each other. The central axis of the eccentric part (52) may be spaced horizontally from the central axis of the main shaft (51).

[0062] A bearing member (60) may be inserted into the main shaft (51) of the shaft (50). The bearing member (60) may be coupled to the upper side of the main shaft (51). The bearing member (60) may be coupled to the main shaft (51) of the shaft (50) so as to rotate together with the shaft (50).

[0063] The bearing member (60) may be provided to be rotatable inside the frame hole (21). A first bearing (73) that rotatably supports the bearing member (60) may be provided inside the frame hole (21). The first bearing (73) may be installed inside the frame hole (21) to rotatably support the bearing member (60). By means of the first bearing (73), the bearing member (60) and the shaft (50) may rotate relative to the frame (20) inside the frame hole (21). For example, the first bearing (73) may include bearing metal.

[0064] A bearing member (60) can be coupled to the upper side of a shaft (50). The bearing member (60) can be coupled to the main axis (51) of the shaft (50) to rotate together with the shaft (50). The bearing member (60) can be coupled to the main axis (51) of the shaft (50) by means of press fitting or welding. For example, the bearing member (60) can be coupled to the main axis (51) of the shaft (50) by means of hot pressing or press fitting.

[0065] The bearing member (60) may include a boss receiving groove (61) provided to accommodate a boss portion (43). The boss receiving groove (61) may be formed by recessing at least a portion of the upper surface of the bearing member (60) downward. Within the boss receiving groove (61), the boss portion (43) of the pivot scroll (40) may pivot together with the eccentric portion (52) of the shaft (50). The boss receiving groove (61) may accommodate oil. The boss receiving groove (61) may be provided to accommodate oil supplied through an oil passage (53) provided in the shaft (50). The boss receiving groove (61) may be referred to as an oil pocket.

[0066] The bearing member (60) may include a balance member (63). The balance member (63) may be provided below the boss receiving groove (61). The balance member (63) can compensate for the center of gravity of the shaft (50) being eccentric due to the eccentric member (52) provided on the upper part of the shaft (50). To this end, the balance member (63) may be positioned facing the opposite side of the eccentric member (52). For example, if the eccentric member (52) is positioned so as to be offset toward one side from the center of the shaft (50), the balance member (63) may be positioned so as to be offset toward the other side from the center of the shaft (50). By providing the balance member (63), vibrations generated during rotation of the shaft (50) and the bearing member (60) can be reduced.

[0067] The eccentric portion (52) may form the upper portion of the shaft (50). The eccentric portion (52) may be formed by protruding vertically upward from the upper surface of the main shaft (51). The eccentric portion (52) may be inserted into the boss portion (43) of the pivot scroll (40). A second bearing (74) may be installed between the eccentric portion (52) of the shaft (50) and the boss portion (43) of the pivot scroll (40). The second bearing (74) may be provided between the eccentric portion (52) and the boss portion (43) to rotatably support the eccentric portion (52). The second bearing (74) may support the eccentric portion (52) to rotate relative to the boss portion (43) inside the boss portion (43). For example, the second bearing (74) may include bearing metal.

[0068] In the scroll compressor (1) according to the present disclosure, at least a portion of the first bearing (73) may be positioned to overlap the second bearing (74) in the radial direction of the first bearing (73). Alternatively, at least a portion of the second bearing (74) may be positioned to overlap the first bearing (73) in the radial direction of the second bearing (74). For example, the top of the first bearing (73) may be positioned radially outward of the second bearing (74), and the top of the first bearing (73) may be positioned above the bottom of the second bearing (74). The bottom of the second bearing (74) may be positioned radially inward of the first bearing (73), and the bottom of the second bearing (74) may be positioned below the top of the first bearing (73).

[0069] In a structure where the first and second bearings are spaced apart in the vertical direction, the shaft is subjected to a relatively large eccentric load, which increases the load applied to the second bearing. As the load applied to the second bearing increases, friction losses between the boss of the slewing scroll and the eccentric portion of the shaft increase, and the efficiency of the compressor decreases. Furthermore, compressor noise increases, bearing reliability decreases, and the length of the compressor also increases because the frame has a structure that is elongated in the axial direction.

[0070] As described above, in the scroll compressor (1) according to the present disclosure, the first bearing (73) and the second bearing (74) are arranged to overlap in the radial direction of the shaft (50), thereby reducing the eccentric load received by the second bearing (74), and reducing friction loss in the first bearing (73) and noise of the scroll compressor (1). In addition, the reliability of the first bearing (73) and the second bearing (74) can be increased, and the scroll compressor (1) can be miniaturized.

[0071] The lower portion of the main shaft (51) can be rotatably supported by a lower frame (76) installed in the housing (10). The lower frame (76) can be fixed to the lower part inside the housing (10). The lower frame (76) can be spaced apart from the frame (20) in an up-and-down or vertical direction. The lower frame (76) can be positioned below the frame (20) so as to be spaced apart from the frame (20).

[0072] A lower frame hole (76a) may be formed in the lower frame (76) to allow the main shaft (51) of the shaft (50) to be inserted. The lower frame hole (76a) may be formed by penetrating the center of the lower frame (76) in a vertical direction. A third bearing (75) may be provided inside the lower frame hole (76a) to rotatably support the lower part of the main shaft (51). The third bearing (75) may rotatably support the main shaft (51) so that the main shaft (51) rotates relative to the lower frame (76) within the lower frame hole (76a). For example, the third bearing (75) may include bearing metal.

[0073] The upper part of the shaft (50) can be supported by the frame (20), and the lower part of the shaft (50) can be supported by the lower frame (76). More specifically, the bearing member (60) coupled to the upper part of the main shaft (51) can be rotatably supported by a first bearing (73) provided inside the frame hole (21), and the lower part of the main shaft (51) can be rotatably supported by a third bearing (75) provided inside the lower frame hole (76a).

[0074] The shaft (50) may include an oil passage (53) that supplies oil from the sump (17) to at least one of the first bearing (73), the second bearing (74), and the third bearing (75). The oil passage (53) may be formed by penetrating the shaft (50) in the direction in which the shaft (50) extends. The direction in which the shaft (50) extends may point in the up-down direction, the vertical direction, or the direction of the rotation axis of the shaft (50).

[0075] The oil passage (53) can be formed by penetrating the main shaft (51) and the eccentric portion (52) of the shaft (50). An outlet (54) of the oil passage (53) can be formed on the top or upper surface of the eccentric portion (52). An inlet (55) of the oil passage (53) can be formed on the bottom or lower surface of the main shaft (51).

[0076] In the oil passage (53), oil can move from bottom to top due to a pressure difference. Thus, oil from the sump (17) can be introduced into the oil passage (53) through an inlet (55) located at the bottom of the oil passage (53), move upward, and then be discharged through an outlet (54) located at the top of the oil passage (53). At least a portion of the oil discharged through the outlet (54) of the oil passage (53) can be supplied to the second bearing (74). The oil supplied to the second bearing (74) can move downward by gravity and be received in the boss receiving groove (61).

[0077] A portion of the oil moving upward along the oil passage (53) can be supplied to the third bearing (75). The shaft (50) may include a third bearing passage (53c) that supplies at least a portion of the oil from the oil passage (53) to the third bearing (75).

[0078] The third bearing passage (53c) can connect the oil passage (53) and the side of the main shaft (51) located inside the third bearing (75). Through the third bearing passage (53c), a portion of the oil in the oil passage (53) can be discharged to the side of the main shaft (51) located inside the third bearing (75). Accordingly, oil can be supplied to the third bearing (75).

[0079] A portion of the oil moving upward along the oil passage (53) may be supplied to the second bearing (74). The shaft (50) may include a second bearing passage (53b) that supplies at least a portion of the oil of the oil passage (53) to the second bearing (74).

[0080] The second bearing passage (53b) can connect the side of the eccentric portion (52) located inside the oil passage (53) and the second bearing (74). The second bearing passage (53b) can connect the side of the second bearing (74) and the side of the shaft (50) that overlaps the second bearing (74) radially from one side of the oil passage (53). Through the second bearing passage (53b), a portion of the oil in the oil passage (53) can be discharged to the side of the eccentric portion (52) located inside the second bearing (74). Accordingly, oil can be supplied to the second bearing (74).

[0081] According to one embodiment, a portion of the oil received in the boss receiving groove (61) can be supplied to the first bearing (73) through the oil passage (53). The bearing member (60) may include a first bearing passage (62) that supplies at least a portion of the oil received in the boss receiving groove (61) to the first bearing (73).

[0082] Oil discharged to the upper surface of the eccentric part (52) through the outlet (54) of the oil passage (53) can move to the boss receiving groove (61) and be received in the boss receiving groove (61). Oil supplied to the second bearing (74) through the second bearing passage (53b) can move downward by gravity and be received in the boss receiving groove (61).

[0083] The first bearing passage (62) can be formed by penetrating the inner surface of the bearing member (60) forming the boss receiving groove (61) and the outer surface of the bearing member (60) forming the boss receiving groove (61). In other words, the first bearing passage (62) can connect the inner side of the bearing member (60) forming the boss receiving groove (61) and the outer side of the bearing member (60) where the first bearing (73) is placed. Through the first bearing passage (62), at least a portion of the oil contained in the boss receiving groove (61) can be discharged to the side of the bearing member (60) located on the inner side of the first bearing (73). The first bearing passage (62) can supply oil to the first bearing (73) by discharging the oil contained in the boss receiving groove (61) to the side of the bearing member (60).

[0084] According to the present disclosure, the scroll compressor (1) may include an oil discharge channel (23) for discharging oil received in an oil pocket or boss receiving groove (61) to the side of the frame (20).

[0085] Referring to FIG. 3, the oil discharge channel (23) can be formed by penetrating the inner surface of the frame (20) where the first bearing (73) is installed and the outer surface of the frame (20). The oil discharge channel (23) can discharge oil from the boss receiving groove (61) or oil pocket to the side of the frame (20).

[0086] When the oil contained in the boss receiving groove (61) fills the boss receiving groove (61), the oil inside the boss receiving groove (61) can flow into the oil discharge passage (23) by passing through the upper surface of the bearing member (60) and the upper surface of the first bearing (73). The oil flowing into the oil discharge passage (23) can move laterally along the oil discharge passage (23) and be discharged to the side of the frame (20).

[0087] The oil discharge channel (23) may include an inlet (23a) formed by recessing at least a portion of the inner side of the frame (20) radially outward from the frame (20). Due to the inlet (23a), a space may be formed between the first bearing (73) and the inner side of the frame (20). Since the first bearing (73) is heat-pressed or press-pressed onto the inner side of the frame (20), no space is formed between the first bearing (73) and the inner side of the frame (20) on which the first bearing (73) is mounted. By providing an inlet (23a) in which at least a portion of the inner side of the frame (20) is recessed, a space may be formed between the first bearing (73) and the inlet (23a), and oil may flow into this space. In other words, the inlet (23a) of the oil discharge channel (23) can form a space where oil can flow between the first bearing (73) and the inner side of the frame (20).

[0088] The oil discharge channel (23) may include a connecting portion (23b) that guides the oil introduced into the inlet portion (23a) to the outer side of the frame (20). According to one embodiment, as shown in FIG. 3, the connecting portion (23b) may connect the bottom of the inlet portion (23a) and the outer side of the frame (20) in a horizontal direction. The diameter of the connecting portion (23b) may be formed to be smaller than the width or height of the inlet portion (23a). The width of the inlet portion (23a) may refer to the length of the inlet portion (23a) in the horizontal direction. The height of the inlet portion (23a) may refer to the length of the inlet portion (23a) in the vertical direction.

[0089] The oil discharge channel (23) may include a discharge section (23c). The inlet section (23a) may be connected to one end of the connecting section (23b), and the discharge section (23c) may be connected to the other end of the connecting section (23b). The discharge section (23c) may be formed by recessing at least a portion of the outer side of the frame (20) into the radial inner side of the frame (20).

[0090] The discharge portion (23c), like the inlet portion (23b), can form a space through which oil can be discharged. The frame (20) can be heat-pressed or press-pressed into the main body (11) so as to be fixed inside the main body (11) of the housing (10). When the frame (20) is fixed inside the main body (11), no space is formed between the inner surface of the main body (11) and the outer side of the frame (20). By providing a discharge portion (23c) in which at least a portion of the outer side of the frame (20) is recessed, a space can be formed between the outer side of the frame (20) and the inner surface of the main body (11), and oil can be discharged into this space. In other words, the discharge portion (23c) of the oil discharge channel (23) can form a space through which oil can be discharged between the outer side of the frame (20) and the inner side of the main body (11).

[0091] As described above, the oil discharge channel (23) may include an inlet section (23a) that forms a space between the first bearing (73) and the inner side of the frame (20) so that oil from the boss receiving groove (61) flows into the inner side of the frame (20), a connecting section (23b) that guides the oil flowing into the inlet section (23a) to the outer side of the frame (20), and a discharge section (23c) that forms a space to discharge the oil discharged through the connecting section (23b) between the outer side of the frame (20) and the inner side of the main body (11). The oil received in the boss receiving groove (61) may flow into the inlet section (23a) by passing the upper surface of the boss receiving groove (61) and the upper surface of the first bearing (73). The oil flowing into the inlet section (23a) may move to the discharge section (23c) along the connecting section (23b). The oil discharged through the discharge section (23c) can move downward by gravity and be stored again in the sump (17).

[0092] According to the present disclosure, the scroll compressor (1) can reduce flow loss caused by oil coming into contact with a rotating structure by including an oil discharge passage (23). By reducing flow loss, the efficiency of the scroll compressor (1) can be improved.

[0093] If an oil discharge channel (23) for discharging oil to the outer side of the frame (20) is not provided, the oil stored in the boss receiving groove (61) is supplied to the first bearing (73) and then falls down below the first bearing (73) due to gravity. Although the oil that falls down below the first bearing (73) is eventually recovered into the sump (17), it comes into contact with the balance portion (63) of the bearing member (60) or the rotor (72) of the drive motor (70) during the process of moving to the sump (17). Energy loss of the rotating structure may occur during the process in which the oil comes into contact with or collides with the rotating structure inside the housing (10) including the balance portion (63) and the rotor (72).

[0094] The scroll compressor (1) according to the present disclosure can reduce the amount of oil discharged below the first bearing (73) by discharging at least a portion of the oil stored in the boss receiving groove (61) through the oil discharge passage (23). By reducing the amount of oil discharged below the first bearing (73), the energy loss caused by the collision between the rotating structure and the oil can be reduced.

[0095] According to the present disclosure, the scroll compressor (1) may include a guide member (80) provided to guide oil discharged through an oil discharge passage (23). The guide member (80) may be positioned below the discharge portion (23c).

[0096] Referring to FIGS. 3 and 6, the guide member (80) may include a first guide member (81) positioned below the discharge member (23c) and located radially inward of the main body (11) than the discharge member (23c), and a second guide member (82) connected to the lower end of the first guide member (81) and extending obliquely from the lower end of the first guide member (81) toward the radially outward side of the main body (11). The guide member (80) may further include a third guide member (83) connected to the lower end of the second guide member (82). The third guide member (83) may extend approximately vertically.

[0097] The guide member (80) can guide the oil so that the oil discharged through the oil discharge channel (23) does not flow into the inside of the drive motor (70). As described above, if the oil flows into the inside of the drive motor (70) and comes into contact with the rotating structure, energy loss may occur. The guide member (80) can guide the oil so that the oil discharged through the oil discharge channel (23) does not move toward the rotor (72) of the drive motor (70).

[0098] Referring to FIG. 5, the inlet (23a) of the frame (20) may have a cross-sectional shape that is approximately an arc or a semicircle. For example, the inlet (23a) may be formed through cutting. The inlet (23a) may be formed by cutting at least a portion of the inner side of the frame (20) by a rotating structure. Due to the nature of this cutting process, the cross-sectional shape of the inlet (23a) formed through the cutting process may be an arc or a semicircle. However, it is not limited thereto. The inlet (23a) may have various processes and various cross-sectional shapes.

[0099] FIG. 7 is a cross-sectional view of a scroll compressor according to one embodiment. FIG. 8 is an enlarged view of B in FIG. 7.

[0100] Referring to FIGS. 7 and 8, a scroll compressor (1) according to one embodiment may include an oil discharge channel (24) that is inclined downward toward the radial outer side of the frame (20). Since the inlet (24a) and the discharge (24c) are identical to the inlet (23a) and discharge (23c) described above, a redundant description is omitted.

[0101] Referring to FIGS. 7 and 8, the oil discharge channel (24) may include a connecting portion (24b) that extends downwardly inclined toward the radial outer side of the frame (20). Since the connecting portion (24b) is provided to be downwardly inclined, the oil inside the connecting portion (24b) can move relatively quickly along the connecting portion (24b) by gravity.

[0102] FIG. 9 is a cross-sectional view of a scroll compressor according to one embodiment. FIG. 10 is an enlarged view of C of FIG. 9.

[0103] Referring to FIGS. 9 and 10, an oil discharge passage (25) of a scroll compressor (1) according to one embodiment may include a first passage (25a, 25c) formed by penetrating the frame (20) in a first direction, and a second passage (25b) extending in a second direction within the frame (20). A stopper (26) may be provided in the first passage (25a, 25c) to block at least a portion of the first passage (25a, 25c). The first direction may point in a diagonal direction. The second direction may point in a horizontal direction. The first direction may point in a downwardly inclined direction toward the radial outer side of the frame (20).

[0104] According to one embodiment, the oil discharge channel (25) may include a first channel (25a, 25c) formed by penetrating the frame (20) in a diagonal direction, and a second channel (25b) extending horizontally within the frame (20).

[0105] The first flow path (25a, 25c) can penetrate the frame (20) so as to slope downward toward the radial outer side of the frame (20). One end of the first flow path (25a, 25c) can be connected to the first bearing (73). Specifically, one end of the first flow path (25a, 25c) can be connected to the upper surface of the first bearing (73).

[0106] The other end of the first flow path (25a, 25c) may be connected to the lower surface of the frame (20). A stopper (26) may be provided in an area adjacent to the other end of the first flow path (25a, 25c) so that oil is not discharged through the other end of the first flow path (25a, 25c). With the stopper (26) provided, oil may not be discharged through the other end of the first flow path (25a, 25c) connected to the lower surface of the frame (20).

[0107] The second Euro (25b) may extend horizontally within the frame (20). One side of the second Euro (25b) may be connected to the first Euro (25a, 25c). The other side of the second Euro (25b) may be connected to the discharge section (25d). Since the discharge section (25d) is identical to the discharge section (23c) described above, a redundant description is omitted.

[0108] Oil flowing from the boss receiving groove (61) through the upper surface of the first bearing (73) into the first flow path (25a, 25c) can move to the discharge section (25d) via the second flow path (25b). As described above, since a stopper (26) is provided in the first flow path (25a, 25c), the oil flowing into the first flow path (25a, 25c) is not discharged to the lower surface of the frame (20) but moves along the second flow path (25b) and can be discharged to the discharge section (25d) provided on the outer side of the frame (20).

[0109] For example, a first flow path (25a, 25c) and a second flow path (25b) can be formed in the frame (20) through a process of machining bolt holes. Since bolt holes can be formed in the frame (20) relatively easily using various tools, the first flow path (25a, 25c) and the second flow path (25b) can be easily formed in the frame (20). A stopper (26) provided to block the first flow path (25a, 25c) on the first flow path (25a, 25c) may be, for example, part or all of a fastening member having screw threads formed on its outer surface.

[0110] A scroll compressor according to one embodiment comprises a housing, a frame fixed to the inside of the housing, a fixed scroll that can be fixed to the inside of the housing and coupled to the frame, a pivoting scroll that is arranged to pivot relative to the fixed scroll and includes a boss portion, an eccentric portion that can be inserted into the boss portion to transmit rotational force to the boss portion, a shaft that includes an oil passage, a bearing member that can be coupled to the shaft and is arranged to rotate together with the shaft, the bearing member that includes a boss receiving groove into which the boss portion can be inserted, a first bearing that rotatably supports the bearing member between the frame and the bearing member, and a second bearing that rotatably supports the eccentric portion between the boss portion and the eccentric portion, wherein the second bearing is arranged such that at least a portion overlaps with the first bearing in the radial direction of the first bearing. The frame includes an oil discharge passage that allows oil from the boss receiving groove to be discharged to the side of the frame, and the oil discharge passage is formed by penetrating at least a portion of the frame based on the eccentric portion being inserted into the boss portion.

[0111] A sump for storing oil may be formed in the lower part of the above housing.

[0112] The above oil passage may extend from the lower surface of the shaft to the upper surface of the shaft to guide the oil of the sump to the upper surface of the shaft.

[0113] The bearing member may further include a first bearing passage arranged to supply oil to the first bearing.

[0114] The first bearing channel can connect the inner side of the bearing member forming the boss receiving groove and the outer side of the bearing member arranged to contact the first bearing.

[0115] The shaft may further include a second bearing passage arranged to supply oil to the second bearing.

[0116] The second bearing passage can connect one side of the oil passage and the side of the eccentric portion arranged to contact the second bearing.

[0117] The above oil discharge channel may include an inlet forming a space between the first bearing and the frame so that oil from the boss receiving groove flows into the space between the first bearing and the inner side of the frame.

[0118] The above-mentioned inlet may be formed such that at least a portion of the inner side of the frame is recessed outward in the radial direction.

[0119] The cross-sectional shape of the above-mentioned inlet may be a semicircle or an arc.

[0120] The above oil discharge channel may further include a connecting portion connecting the inlet portion and the outer side of the frame to guide the oil from the inlet portion to the outer side of the frame.

[0121] The above oil discharge channel may further include a discharge section that forms a space between the outer side of the frame and the inner side of the housing to discharge oil introduced to one side of the connection section through the inlet section between the inner side of the main body and the outer side of the frame.

[0122] The above discharge portion may be formed such that at least a portion of the outer side of the frame is recessed inward in the radial direction of the frame.

[0123] The above connecting portion may be formed by penetrating the frame in the radial direction of the frame to connect one side of the inlet portion and one side of the outlet portion.

[0124] The above connecting portion may be formed by penetrating the frame to connect one side of the inlet portion and one side of the outlet portion.

[0125] The above connecting portion may be provided to slope downward as it extends radially outward from the frame.

[0126] The scroll compressor may further include a guide member positioned below the frame to guide the oil discharged through the oil discharge passage to the radially outer side of the frame.

[0127] The above guide member may further include a first guide portion disposed below the oil discharge channel and arranged to be located radially inward of the frame than the oil discharge channel.

[0128] The above guide member may further include a second guide member that is connected to the lower end of the first guide member and is arranged to be inclined downward from the lower end of the first guide member toward the radial outer side of the frame.

[0129] The guide member may further include a third guide member that is connected to the lower end of the second guide member and extends vertically from the lower end of the second guide member.

[0130] According to the concept of the present disclosure, a scroll compressor with improved efficiency can be provided by reducing flow loss caused by oil contacting a rotating structure.

[0131] According to the concept of the present disclosure, a scroll compressor with improved efficiency can be provided by improving the oil discharge path.

[0132] Specific embodiments have been illustrated and described above. However, the invention is not limited to the embodiments described above, and those skilled in the art may make various modifications without departing from the essence of the technical concept of the invention as described in the following claims.

Claims

1. Housing; A frame fixed to the inside of the above housing; A fixed scroll that can be fixed to the inside of the housing and coupled to the frame; A pivot scroll arranged to pivot relative to the above fixed scroll and including a boss portion; A shaft including an eccentric portion insertable into the boss portion to transmit rotational force to the boss portion, and an oil passage; A bearing member capable of being coupled to the shaft and arranged to rotate together with the shaft, comprising a boss receiving groove into which the boss portion can be inserted; A first bearing that rotatably supports the bearing member between the frame and the bearing member; and A second bearing that rotatably supports the eccentric portion between the boss portion and the eccentric portion, wherein the second bearing is arranged such that at least a portion overlaps with the first bearing in the radial direction of the first bearing; comprising The above frame includes an oil discharge channel that allows oil from the boss receiving groove to be discharged to the side of the frame, and the oil discharge channel is formed by penetrating at least a portion of the frame based on the eccentric portion being inserted into the boss portion.

2. In Paragraph 1, A sump is formed in the lower part of the above housing to store oil, and The above oil passage is a scroll compressor extending from the lower surface of the shaft to the upper surface of the shaft to guide the oil of the sump to the upper surface of the shaft.

3. In Paragraph 1, The above bearing member further includes a first bearing passage arranged to supply oil to the first bearing, and A scroll compressor in which the first bearing path connects the inner side of a bearing member forming the boss receiving groove and the outer side of the bearing member arranged to contact the first bearing.

4. In Paragraph 3, The shaft further includes a second bearing passage arranged to supply oil to the second bearing, and A scroll compressor in which the second bearing passage connects one side of the oil passage and the side of the eccentric portion arranged to contact the second bearing.

5. In Paragraph 1, The above oil discharge path is, A scroll compressor comprising an inlet portion that forms a space between the first bearing and the frame so that oil from the boss receiving groove flows into the space between the first bearing and the inner side of the frame.

6. In Paragraph 5, The above-mentioned inlet is formed such that at least a portion of the inner side of the frame is recessed outward in the radial direction of the frame, and A scroll compressor in which the cross-sectional shape of the inlet is a semicircle or an arc.

7. In Paragraph 5, The above oil discharge path is, A scroll compressor further comprising a connecting portion connecting the inlet portion and the outer side of the frame to guide the oil from the inlet portion to the outer side of the frame.

8. In Paragraph 7, The above oil discharge path is, A scroll compressor further comprising a discharge portion that forms a space between the outer side of the frame and the inner side of the housing, so as to discharge oil introduced to one side of the connection portion through the inlet portion between the inner side of the housing and the outer side of the frame.

9. In Paragraph 8, The above discharge portion is a scroll compressor formed by indenting at least a portion of the outer side of the frame inwardly in the radial direction.

10. In Paragraph 8, The above connecting portion is a scroll compressor formed by penetrating the frame in the radial direction to connect one side of the inlet portion and one side of the outlet portion.

11. In Paragraph 8, The above connecting portion is formed by penetrating the frame to connect one side of the inlet portion and one side of the outlet portion, and The above-mentioned connecting portion is a scroll compressor that is inclined downward as it extends radially outward from the frame.

12. In Paragraph 1, A scroll compressor further comprising: a guide member disposed below the frame to guide oil discharged through the oil discharge channel to the radially outer side of the frame.

13. In Paragraph 12, The above guide member is, A scroll compressor further comprising a first guide portion positioned below the oil discharge passage and arranged to be located radially inward of the frame than the oil discharge passage.

14. In Paragraph 13, The above guide member is, A scroll compressor further comprising a second guide portion connected to the lower end of the first guide portion and arranged to be inclined downward from the lower end of the first guide portion toward the radial outer side of the frame.

15. In Paragraph 14, The above guide member is, A scroll compressor further comprising a third guide section connected to the lower end of the second guide section and extending vertically from the lower end of the second guide section.

Images