Compressor

Abstract

This compressor comprises: a housing; a driving unit provided inside the housing to generate power; a compression unit provided inside the housing to compress a refrigerant; and a shaft provided to transmit the power generated by the driving unit to the compression unit. The shaft comprises: a shaft body including an oil flow path; a suction hole formed at the lower end of the shaft body and provided to suck oil accommodated in the housing into the oil flow path; a discharge hole formed to discharge the oil flowing along the oil flow path toward the outer circumferential surface of the shaft body; and a filter unit inserted into the discharge hole to filter foreign substances from the oil.

Description

compressor

[0001] The present disclosure relates to a compressor used in air conditioners, etc.

[0002] A compressor is a mechanical device that receives power from a power generation device, such as an electric motor or turbine, and compresses air, refrigerants, or various other working gases to increase their pressure. Compressors are widely used in home appliances, such as refrigerators, air conditioners, and clothes dryers, as well as across various industries.

[0003] Types of compressors include reciprocating compressors, scroll compressors, and rotary compressors. In a reciprocating compressor, a compression space is formed between the piston and the cylinder for the intake and discharge of working gas, and the piston compresses the working gas by performing a linear reciprocating motion inside the cylinder. In a scroll compressor, a compression space is formed between the rotary scroll and the stationary scroll for the intake and discharge of working gas, and the rotary scroll compresses the working gas as it rotates along the stationary scroll. In a rotary compressor, a compression space is formed between the cylinder and the eccentrically rotating rolling piston for the intake and discharge of working gas, and the rolling piston compresses the working gas as it rotates eccentrically along the inner wall of the cylinder.

[0004] The compressor includes a compression section where the compression of the refrigerant is performed, and a driving section that provides power for the compression of the refrigerant.

[0005] Inside the compressor, oil circulates to act as a lubricant, reducing friction between rotating members.

[0006] One aspect of the present disclosure may provide a compressor comprising a filter portion inserted into a discharge hole of a shaft.

[0007] One aspect of the present disclosure may provide a compressor comprising a filter portion inserted into a suction hole of a shaft.

[0008] One aspect of the present disclosure may provide a compressor comprising a separate filter section provided around the suction hole of a shaft.

[0009] 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.

[0010] A compressor according to one embodiment comprises a housing, a driving unit provided inside the housing to generate power, a compression unit provided inside the housing to perform compression of a refrigerant, and a shaft provided to transmit power generated by the driving unit to the compression unit, wherein the shaft comprises a shaft body including an oil passage, a suction hole formed at the lower end of the shaft body and provided to suck oil contained in the housing into the oil passage, a discharge hole provided to discharge oil flowing along the oil passage toward the outer surface of the shaft body, and a filter unit inserted into the discharge hole to filter foreign substances in the oil.

[0011] A compressor according to one embodiment includes a shaft comprising a housing and an oil passage, wherein the shaft includes a suction hole provided to draw oil into the oil passage and a plurality of discharge holes formed on the outer surface of the shaft body to discharge oil within the oil passage, and a filter portion including a porous filter is inserted into at least one of the discharge hole and the suction hole.

[0012] FIG. 1 is an axial cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0013] FIG. 2 is a drawing for explaining the flow of oil in a compressor according to one embodiment of the present disclosure.

[0014] FIG. 3 illustrates a shaft according to one embodiment of the present disclosure.

[0015] Figure 4 is a cross-sectional view of the shaft shown in Figure 3.

[0016] FIG. 5 illustrates the process of inserting a filter portion into a discharge hole according to one embodiment of the present disclosure.

[0017] FIG. 6 illustrates a filter portion inserted into an exhaust hole according to one embodiment of the present disclosure.

[0018] FIG. 7 illustrates a filter portion including a sleeve according to one embodiment of the present disclosure.

[0019] FIG. 8 illustrates a filter portion inserted into a discharge hole according to one embodiment of the present disclosure.

[0020] FIG. 9 illustrates a filter portion including a sleeve according to one embodiment of the present disclosure.

[0021] FIG. 10 illustrates the process of inserting a filter portion into a discharge hole according to one embodiment of the present disclosure.

[0022] FIG. 11 illustrates the process of inserting a first filter section and a second filter section into a discharge hole and an oil cap according to one embodiment of the present disclosure.

[0023] FIG. 12 illustrates a filter portion inserted into an oil cap according to one embodiment of the present disclosure.

[0024] FIG. 13 illustrates a filter section including a magnet according to one embodiment of the present disclosure.

[0025] FIG. 14 illustrates a shaft and a filter cap according to one embodiment of the present disclosure.

[0026] FIG. 15 illustrates a filter cap provided around a suction hole according to one embodiment of the present disclosure.

[0027] FIG. 16 illustrates a third filter portion provided around a suction hole according to one embodiment of the present disclosure.

[0028] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0029] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0030] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0031] 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.

[0032] The term "and / or" includes a combination of multiple related described components or any of the multiple related described components.

[0033] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in other aspects (e.g., importance or order).

[0034] 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.

[0035] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0036] 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.

[0037] 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.

[0038] Hereinafter, a clothing processing device according to various embodiments will be described in detail with reference to the attached drawings.

[0039] FIG. 1 is an axial cross-sectional view of a compressor according to one embodiment of the present disclosure.

[0040] Referring to FIG. 1, a compressor (1) according to one embodiment of the present disclosure may include a compression unit (20) configured to compress a refrigerant, a driving unit (30) provided to provide power to the compression unit (20), and a housing (10) that accommodates the compression unit (20) and the driving unit (30).

[0041] The housing (10) can form the exterior of the compressor (1). Inside the housing (10), a receiving space can be formed to accommodate the compression unit (20) and the driving unit (30). Oil can be stored in the lower inner part of the housing (10) to reduce friction between the various components of the compressor (1) and to cool the components.

[0042] The housing (10) can be connected to the accumulator (2) by the compressor inlet pipe (4). The refrigerant in the accumulator (2) can be introduced into the compression chamber (22) in the cylinder (21) through the cylinder inlet pipe (4).

[0043] A compressor discharge pipe (5) may be connected to the discharge portion (3) of the housing (10). The compressor discharge pipe (5) may be provided to guide the refrigerant compressed inside the housing (10) to be discharged outside the housing (10).

[0044] The driving unit (30) can convert electromagnetic force into mechanical rotational force. The driving unit (30) may include a stator (31) fixed to the housing (10) and a rotor (32) having magnetism and capable of rotating relative to the stator (31) by means of electromagnetic force.

[0045] The compressor (1) may include a shaft (40) configured to transmit power generated in the drive unit (30) to the compression unit (20). The shaft (40) may be fixed to the rotor (32) and configured to rotate together with the rotor (32).

[0046] The shaft (40) may include an oil passage (45). Oil may be supplied from the suction hole (49) at the bottom of the shaft (40) to the top of the shaft (40) through the oil passage (45).

[0047] The compression unit (20) may include a cylinder (21) including a compression chamber (22). The compression chamber (22) may be provided inside the cylinder (21). The compression unit (20) may include a rolling piston (23) rotatably provided inside the cylinder (21). The rolling piston (23) may be provided to compress the refrigerant in the compression chamber (22) as it rotates inside the cylinder (21). The rolling piston (23) may be provided to rotate by receiving power from a shaft (40).

[0048] The cylinders (21) of the compression section (20) may be provided in multiple numbers and may be spaced apart along the direction of the rotation axis (47). The cylinders (21) may include an upper cylinder and a lower cylinder, and a mid plate (26) that partitions the space between the upper cylinder and the lower cylinder may be provided between the upper cylinder and the lower cylinder.

[0049] The shock absorber (100) may be provided on the upper part of the drive unit (30). The shock absorber (100) may include a body (110), a bearing part (120), a rim part (130), and a hole (140). The shock absorber (100) may be placed on the upper part of the housing (10). The shock absorber (100) may be coupled to the inner side of the housing (10). The rim part (130) of the shock absorber (100) may be pressed into the inner surface of the housing (10).

[0050] A bearing portion (120) may be provided on the lower surface (111) of the shock absorber (100). The bearing portion (120) may include a contact projection (121) formed by protruding from the lower surface (111) of the shock absorber (100). The contact projection (121) of the bearing portion (120) may contact the shaft (40) to rotatably support the shaft (40). The contact projection (121) of the bearing portion (120) may be inserted into an oil passage (45) at the top of the shaft (40).

[0051] A contact end (122) may be formed at the end of the bearing portion (120). The surface of the contact end (122) may be tapered in a direction that approaches the rotation axis (47) as it goes downward. The surface of the contact end (122) may come into contact with the inner upper surface of the shaft (40). The inner surface (41b) of the upper surface of the shaft (40) may be tapered at a predetermined angle to correspond to the surface of the contact end (122). A surface to be supported (44) may be formed at the upper surface of the inner surface (41b) of the shaft (40) at a position corresponding to the outer surface of the contact end (122) that supports the shaft.

[0052] The gap formed between the surface to be supported (44) at the top of the shaft (40) and the outer surface of the contact end (122) can be formed to be approximately tens of micrometers. A gap of approximately tens of micrometers can be formed on the surface to be supported (44). Oil can be placed in the gap formed on the surface to be supported (44). A lubricating film can be formed between the contact end (122) and the surface to be supported (44).

[0053] A separate fluid channel (not shown) may be formed on the upper part of the shaft (40). The separate fluid channel (not shown) may refer to a gap formed between the bearing part (120) and the upper part of the shaft (40). The separate fluid channel (not shown) may have a fluid channel area of ​​approximately several micrometers to tens of micrometers. The separate fluid channel (not shown) may refer to a lubricating film formed on the surface to be supported (44).

[0054] A lubricating film may be formed by oil passing through a separate passage (not shown), and the lubricating film may refer to oil located inside the separate passage (not shown). Friction between the bearing portion (120) and the upper end of the shaft (40) may be reduced by the lubricating film.

[0055] The bearing portion (120) can control the amount of oil discharged through a gap formed on the supported surface (44). The gap formed on the supported surface (44) can be widened or narrowed by wear on the contact end (122) and the upper end of the shaft (40).

[0056] A hole (140) for the compressed refrigerant gas to pass through may be provided in the periphery of the upper surface (112) of the body (110) of the buffer (100). The hole (140) may be formed to penetrate the upper surface (112) in a direction parallel to the rotation axis (47). Multiple holes (140) may be formed.

[0057] A body filter (150) capable of filtering vaporized oil may be provided on the upper surface (112) of the body (110).

[0058] FIG. 2 is a drawing for explaining the flow of oil in a compressor according to one embodiment of the present disclosure.

[0059] Referring to FIG. 2, oil that acts as a lubricant can be stored in the inner lower part of the housing to reduce friction between the rotating members of the compressor.

[0060] An oil passage (45) can be formed in the shaft (40) that penetrates the upper and lower ends of the shaft (40). The oil passage (45) can be formed with a predetermined diameter centered on the rotation axis (47) of the shaft (40). Oil stored in the lower part of the housing (10) can pass through the shaft (40) and move to the upper space of the drive unit (30) through the oil passage (45).

[0061] A suction hole (49) may be provided at the bottom of the shaft (40) so as to be in communication with the oil passage (45) and to allow oil to flow into the oil passage (45). The suction hole (49) may be provided to penetrate the compression section (20). Oil stored in the lower part of the housing (10) may flow into the oil passage (45) through the suction hole (49).

[0062] A pump (46) for guiding the movement of oil may be provided at the lower part of the shaft (40). The pump (46) may be provided inside the oil passage (45) and may be positioned directly above the suction hole (49). The pump (46) may be provided in a roughly threaded shape.

[0063] The pump (46) may be fixed to the inside of the shaft (40) and arranged to rotate together with the rotation of the shaft (40). As the pump (46) rotates, oil introduced through the suction hole (49) may move to the upper part of the shaft (40). Oil introduced to the lower part of the shaft (40) may rise along the incline of the rotating pump (46).

[0064] The shaft (40) may include a plurality of discharge holes (48). Some of the oil moving to the upper part of the shaft (40) within the oil passage (45) may be discharged through the discharge holes (48). A filter part (50) inserted into the discharge holes (48) can filter out foreign substances in the oil. More details regarding this will be described later.

[0065] The compressor (1) can supply lubricating oil to the bearing part (120) through the oil passage (45). The supplied lubricating oil can be guided to the outside of the shaft (40) by passing through a lubricating film located on the surface to be supported (44). The outside of the shaft (40) is the upper space of the driving part (30), and may refer to the space provided between the buffer (100) and the driving part (30).

[0066] The amount of oil discharged can be controlled through a separate flow path (not shown). The pressure of the oil passing through the separate flow path (not shown) can be reduced.

[0067] The oil moved through the oil passage (45) can be supplied to the bearing part (120) through a separate passage (not shown). The oil can be guided to the outside of the shaft (40) by passing through the separate passage (not shown).

[0068] Oil discharged to the outside of the shaft (40) through a separate Euro (not shown) can be guided to the lower side of the housing (10). The oil can descend by gravity. The oil can move along the inner wall surface of the housing (10) or through the space provided between the components of the drive unit (30). For example, the stator (31) and rotor (32) of the drive unit (30) can be spaced apart with an air layer of approximately tens of micrometers between them.

[0069] The oil guided to the lower side of the housing (10) may be included in the oil stored in the lower side of the housing (10). The oil discharged through a separate passage (not shown) at the top of the shaft (40) may be stored again in the lower side of the housing (10). The oil supplied to the lubricating film may be stored again in the lower side of the housing (10). The oil in the lower side of the housing (10) may be guided to reach the lower side of the housing (10) again through the oil passage (45) and a separate passage (not shown). An oil circulation system may be provided inside the housing (10).

[0070] FIG. 3 illustrates a shaft according to one embodiment of the present disclosure. FIG. 4 is a cross-sectional view of the shaft illustrated in FIG. 3. FIG. 5 illustrates the process of inserting a filter portion into a discharge hole according to one embodiment of the present disclosure.

[0071] Referring to FIGS. 3 to 5, the shaft (40) may include an oil passage (45). Specifically, an oil passage (45) extending in the direction of the rotation axis (47) within the shaft body (41) may be arranged.

[0072] As previously described, the shaft (40) may include a suction hole (49) and an exhaust hole (48). The suction hole (49) may be formed at the lower end of the shaft body (41). Specifically, the suction hole (49) may be formed at the lower end of the oil cap (43). The suction hole (49) can draw oil contained in the housing (10) into the oil passage (45). As previously described, the oil drawn in through the suction hole (49) can circulate inside the housing (10).

[0073] A discharge hole (48) may be provided between the outer surface (41a) of the shaft body (41) and the oil passage (45). As previously described, oil introduced through the suction hole (49) can be moved to the upper part of the shaft (40) through a pump (46) provided inside the shaft body (41). Some of the oil moving to the upper part of the shaft (40) within the oil passage (45) may be discharged through the discharge hole (48). For example, the discharge hole (48) may be provided to discharge oil flowing along the oil passage (45) toward the outer surface (41a) of the shaft body (41). The shaft (40) may include a plurality of discharge holes (48).

[0074] A filter section (50) may be inserted into the discharge hole (48) to filter foreign substances in the oil. The filter section (50) may be provided in a shape corresponding to the discharge hole (48). The filter section (50) may be provided in multiple numbers corresponding to multiple discharge holes (48). In FIGS. 6 to 10 below, an enlarged cross-sectional view of part A shown in FIG. 4 is shown, and details will be described later.

[0075] FIG. 6 illustrates a filter portion inserted into an exhaust hole according to one embodiment of the present disclosure.

[0076] Referring to FIG. 6, a filter unit (50) according to one embodiment of the present disclosure may include a porous filter (51). The porous filter (51) can filter foreign substances in the oil flowing along the oil passage (45). The pore size of the porous filter (51) may be provided to be 60 to 200 μm. A porous filter (51) provided to be 60 to 200 μm can allow the oil to flow smoothly. A porous filter (51) provided to be 60 to 200 μm can filter foreign substances larger than 60 to 200 μm. However, the size and shape of the porous filter (51) are not limited to this embodiment.

[0077] The filter section (50) may include a metal or ceramic material. A filter section (50) including a metal material can exhibit stable filtering performance even in high temperature and high pressure lubrication environments. A filter section (50) including a ceramic material can exhibit stable filtering performance even when in contact with various components or corrosive substances contained in the oil. However, the material of the filter section (50) is not limited to these embodiments.

[0078] FIG. 7 illustrates a filter portion including a sleeve according to one embodiment of the present disclosure.

[0079] Referring to FIG. 7, a filter portion (50) according to one embodiment of the present disclosure may include a sleeve (52). The sleeve (52) may be provided on the outer surface of a porous filter (51). The sleeve (52) may accommodate the porous filter (51) and be pressed into the discharge hole (48). The sleeve (52) may include a plastic or rubber material. The plastic or rubber material of the sleeve (52) may strengthen the adhesion force when the filter portion (50) is inserted into the discharge hole (48). The plastic or rubber material of the sleeve (52) may minimize the risk of damage to the filter portion (50) when inserting and removing the filter portion (50) from the discharge hole (48). However, the material of the sleeve (52) is not limited to this embodiment.

[0080] When the compressor (1) is driven, as the shaft (40) rotates, centrifugal force may be generated toward the outer surface (41a) of the shaft body (41) on the filter part (50) inserted into the discharge hole (48). For example, centrifugal force may be generated toward the outer surface (41a) of the shaft body (41) on the filter part (50), causing the filter part (50) to come out of the discharge hole (48).

[0081] A toothed portion (53) may be provided on the outer surface of the sleeve (52). Multiple toothed portions (53) may be provided on the outer surface of the sleeve (52). The shape of the toothed portion (53) may be provided to be inclined downward in the direction toward the oil passage (45). Specifically, the shape of the toothed portion (53) is provided to be inclined downward in the direction toward the oil passage (45), thereby allowing the filter portion (50) to be easily inserted into the discharge hole (48) and improving the fixing force of the filter portion (50) inserted into the discharge hole (48). As described above, even if centrifugal force is generated toward the outer surface (41a) of the shaft body (41) while the shaft (40) rotates, the filter portion (50) can be fixed to the discharge hole (48) by the toothed portion (53) provided on the outer surface of the sleeve (52) included in the filter portion (50). However, the shape of the toothed portion (53) is not limited to this embodiment.

[0082] FIG. 8 illustrates a filter portion inserted into an exhaust hole according to one embodiment of the present disclosure. FIG. 9 illustrates a filter portion including a sleeve according to one embodiment of the present disclosure.

[0083] Referring to FIGS. 8 and 9, a portion of the filter portion (50) according to one embodiment of the present disclosure may be provided to protrude into the interior of the oil passage (45). The portion of the filter portion (50) protruding into the interior of the oil passage (45) can prevent foreign substances in the oil from stagnating or accumulating inside the oil passage (45). The portion of the filter portion (50) protruding into the interior of the oil passage (45) can maintain a constant flow of oil occurring inside the oil passage (45). For example, when the filter portion (50) protrudes into the interior of the oil passage (45), foreign substances in the oil are gradually filtered from inside the oil passage (45) through the protruding filter portion (50), thereby reducing changes in the oil flow rate before and after filtering, allowing the oil to flow stably.

[0084] A sleeve (52) according to one embodiment of the present disclosure may include a projection (54) provided to fix the filter portion (50) to the discharge hole (48). Specifically, projections protruding in the direction of the rotation axis (47) may be provided at both ends of the sleeve (52). A plurality of projections may be provided in the sleeve (52). A projection (54) provided at one end of the sleeve (52) may be placed inside the oil passage (45) and fixed to the inner surface of the oil passage (45). A projection (54) provided at the other end of the sleeve (52) may be fixed to the outer surface (41a) of the shaft body (41). For example, the projections (54) provided at both ends of the sleeve (52) may prevent the filter portion (50) inserted into the discharge hole (48) from moving toward the outer surface (41a) of the shaft body (41). For example, protrusions (54) provided at both ends of the sleeve (52) can prevent the filter part (50) inserted into the discharge hole (48) from moving toward the oil passage (45). However, the shape of the protrusions (54) is not limited to this embodiment.

[0085] FIG. 10 illustrates the process of inserting a filter portion into a discharge hole according to one embodiment of the present disclosure.

[0086] Referring to FIG. 10, one surface (55) of a filter portion (50) according to one embodiment of the present disclosure may be provided in a conical or tapered shape. Specifically, when the filter portion (50) is inserted into the discharge hole (48), the one surface (55) that is inserted first may be provided in a conical or tapered shape. A filter portion (50) having one surface (55) provided in a conical or tapered shape can be easily inserted into the discharge hole (48). The one surface (55) provided in a conical or tapered shape of the filter portion (50) can effectively reduce friction and resistance that occur when the filter portion (50) is inserted into the discharge hole (48). However, the shape of one surface (55) of the filter portion (50) is not limited to this embodiment.

[0087] FIG. 11 illustrates the process of inserting a first filter section and a second filter section into a discharge hole and an oil cap according to one embodiment of the present disclosure. FIG. 12 illustrates a filter section inserted into an oil cap according to one embodiment of the present disclosure. FIG. 13 illustrates a filter section including a magnet according to one embodiment of the present disclosure.

[0088] Referring to FIGS. 11 to 13, a compressor (2) according to one embodiment of the present disclosure will be described. In describing the compressor (2) shown in FIGS. 11 to 13, the same reference numerals are assigned to components identical to the compressor (1) shown in FIGS. 1 to 10, and detailed descriptions may be omitted.

[0089] Referring to FIGS. 11 to 13, a compressor (2) according to one embodiment of the present disclosure may include a first filter section (50) inserted into a discharge hole (48) and a second filter section (60) inserted into an oil cap (43). As previously described, a suction hole (49) may be formed at the lower end of a shaft body (41). Specifically, a suction hole (49) may be formed at the lower end of an oil cap (43) positioned at the lower end of a shaft body (41). As previously described, oil that flows into the interior of an oil passage (45) through the suction hole (49) provided at the lower end of the oil cap (43) may move to the upper end of a shaft (40a) through a pump (246).

[0090] The filter portion (50) inserted into the aforementioned discharge hole (48) may correspond to the first filter portion (50) of the compressor (2) according to one embodiment of the present disclosure. The compressor (2) may further include the first filter portion (50) and a second filter portion (60) inserted into the oil cap (43). Specifically, the second filter portion (60) may be provided on the upper part of the oil cap (43). The second filter portion (60) may be provided in a shape corresponding to the shape of the oil cap (43). However, unlike that shown in FIG. 11, the compressor (2) according to one embodiment of the present disclosure may include only the second filter portion (60) excluding the first filter portion (50).

[0091] The second filter section (60) may include a porous filter (61). The porous filter (61) can capture foreign substances contained in the oil before the oil flows into the oil passage (45). The pore size of the porous filter (61) may be provided to be 60 to 200 μm. The porous filter (61) provided to be 60 to 200 μm can allow the oil to flow smoothly. The porous filter (61) provided to be 60 to 200 μm can filter foreign substances larger than 60 to 200 μm. However, the size and shape of the porous filter (61) are not limited to this embodiment.

[0092] The second filter section (60) may include a magnet (62). A magnet (62) may be provided inside the second filter section (60). The magnet (62) included in the second filter section (60) can prevent magnetic foreign substances in the oil from entering the oil passage (45). For example, the magnet (62) included in the second filter section (60) can prevent magnetic foreign substances in the oil from entering the oil passage (45) by capturing them inside the oil cap (43). The magnet (62) may be placed in the center of the second filter section (60). The magnet (62) may be provided in a cylindrical shape. However, the position and shape of the magnet (62) placed inside the second filter section (60) are not limited to this embodiment.

[0093] FIG. 14 illustrates a shaft and a filter cap according to one embodiment of the present disclosure. FIG. 15 illustrates a filter cap provided around a suction hole according to one embodiment of the present disclosure. FIG. 16 illustrates a third filter portion provided around a suction hole according to one embodiment of the present disclosure.

[0094] Referring to FIGS. 14 to 16, a compressor (3) according to one embodiment of the present disclosure will be described. In describing the compressor (3) shown in FIGS. 14 to 16, the same reference numerals are assigned to components identical to the compressor (1) shown in FIGS. 1 to 10, and detailed descriptions may be omitted.

[0095] Referring to FIGS. 14 and 15, a compressor (3) according to one embodiment of the present disclosure may include a filter cap (80) provided around a suction hole (49). Specifically, a third filter section (70) may be provided around an oil cap (43) and may be provided in a form that surrounds the suction hole (49). A portion of the suction hole (49) and the oil cap (43) may be inserted into the interior of the filter cap (80). For example, the filter cap (80) can prevent foreign substances in the oil from entering the oil passage (45) before the oil in the housing (10) flows into the suction hole (49).

[0096] The filter cap (80) may include an outer rib (81) and an inner rib (82). The outer rib (81) may be formed in a curved shape that is bent toward the upper direction of the oil cap (43). The outer rib (81) may be formed integrally on the upper edge of the filter cap (80). The outer rib (81) is positioned on the outside of the filter cap (80) to prevent foreign substances in the oil from entering the interior of the filter cap (80). However, the shape of the outer rib (81) is not limited to this embodiment.

[0097] The inner rib (82) may be provided in a curved shape that is bent toward the upper direction of the oil cap (43). The inner rib (82) may be positioned on the inner side of the filter cap (80). One end of the inner rib (82) may be provided to contact the oil cap (43). The inner rib (82) may be provided in multiple numbers. The multiple inner ribs (82) can prevent foreign matter in the oil, which is larger than the space between adjacent inner ribs (82), from entering the filter cap (80). One end of the inner rib (82) may be provided to contact the surface of the oil cap (43) to prevent oil from leaking out. One end of the inner rib (82) is formed to be in close contact with the surface of the oil cap (43), so that when the shaft (40a) is inserted into the filter cap (80), the filter cap (80) can be more stably fixed to the shaft (40a). However, the shape of the inner rib (82) is not limited to this embodiment. Unlike that shown in FIG. 14 and FIG. 15, the shaft (40b) of the compressor (3) according to the embodiment of the present disclosure may further include the aforementioned first filter section (50).

[0098] Referring to FIG. 16, a compressor (3) according to one embodiment of the present disclosure may further include a third filter section (70) provided around the suction hole (49). Specifically, the third filter section (70) may be provided around the oil cap (43) and may be provided in a form that surrounds the suction hole (49). A portion of the suction hole (49) and the oil cap (43) may be inserted into the interior of the third filter section (70). For example, the third filter section (70) can prevent foreign substances in the oil from entering the oil passage (45) before the oil in the housing (10) flows into the suction hole (49).

[0099] The third filter section (70) may include a porous filter (71). The porous filter (71) can capture foreign substances contained in the oil before the oil flows into the oil passage (45). The pore size of the porous filter (71) may be provided to be 60 to 200 μm. The porous filter (71) provided to be 60 to 200 μm can allow the oil to flow smoothly. The porous filter (71) provided to be 60 to 200 μm can filter foreign substances larger than 60 to 200 μm. However, the size and shape of the porous filter (71) are not limited to this embodiment. Unlike what is shown in FIG. 16, the shaft (40b) of the compressor (3) according to the embodiment of the present disclosure may further include the aforementioned first filter section (50) and second filter section (60).

[0100] A compressor according to one embodiment comprises a housing, a driving unit provided inside the housing to generate power, a compression unit provided inside the housing to perform compression of a refrigerant, and a shaft provided to transmit power generated by the driving unit to the compression unit, wherein the shaft comprises a shaft body including an oil passage, a suction hole formed at the lower end of the shaft body and provided to suck oil contained in the housing into the oil passage, a discharge hole provided to discharge oil flowing along the oil passage toward the outer surface of the shaft body, and a filter unit inserted into the discharge hole to filter foreign substances in the oil.

[0101] The above filter unit may include a porous filter.

[0102] The above filter part may include a metal or ceramic material.

[0103] A part of the above filter section may be provided to protrude into the interior of the oil passage.

[0104] The filter portion may further include a sleeve provided on the outer surface of the porous filter to accommodate the porous filter and press-fit into the discharge hole.

[0105] The sleeve may include a projection provided to fix the filter portion to the discharge hole.

[0106] A toothed portion may be provided on the outer surface of the above sleeve.

[0107] The above sleeve may include plastic or rubber material.

[0108] One side of the filter portion may be provided in a conical or tapered shape so as to be easily inserted into the discharge hole.

[0109] The above filter unit is a first filter unit and may further include a second filter unit inserted into an oil cap including the suction hole to filter foreign substances in the oil.

[0110] The second filter section above may include a porous filter.

[0111] The second filter unit may include a magnet.

[0112] It may further include a third filter section provided around the suction hole to prevent foreign substances in the oil from entering the oil passage.

[0113] The above third filter section may include a porous filter.

[0114] It may further include a filter cap provided around the suction hole to prevent foreign substances in the oil from entering the oil passage.

[0115] A compressor according to one embodiment includes a shaft comprising a housing and an oil passage, wherein the shaft includes a suction hole provided to draw oil into the oil passage and a plurality of discharge holes formed on the outer surface of the shaft body to discharge oil within the oil passage, and a filter portion including a porous filter may be inserted into at least one of the discharge hole and the suction hole.

[0116] The above filter portion may include a sleeve provided on the outer surface of the porous filter.

[0117] The sleeve may include protrusions provided at both ends of the sleeve or serrated portions provided on the outer surface of the sleeve.

[0118] The above filter part may be provided in a conical or tapered shape.

[0119] It may further include a filter cap provided around the suction hole to prevent foreign substances in the oil from entering the oil passage.

[0120] According to the concept of the present disclosure, foreign substances in the lubricating oil can be effectively removed by inserting a filter portion into the intake hole or the exhaust hole.

[0121] According to the concept of the present disclosure, a structure for inserting a filter part into a discharge hole can be applied to various compressors without additional processing, thereby improving the productivity of the compressor.

[0122] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs.

[0123] 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 driving unit provided inside the above housing to generate power; A compression section provided inside the above housing for performing compression of the refrigerant; and It includes a shaft arranged to transmit power generated in the above-mentioned drive unit to the compression unit, and The above shaft is, Shaft body including an oil passage; A suction hole formed at the lower end of the shaft body and provided to suck oil contained in the housing into the oil passage; A discharge hole provided to discharge oil flowing along the above oil passage toward the outer surface of the shaft body; and A compressor including a filter section inserted into the discharge hole to filter foreign substances in the oil.

2. In Paragraph 1, The above filter section is a compressor including a porous filter.

3. In Paragraph 1, The above filter section is a compressor comprising a metal or ceramic material.

4. In Paragraph 1, A compressor in which a part of the above filter section is arranged to protrude into the interior of the above oil passage.

5. In Paragraph 2, The above filter section further includes a sleeve provided on the outer surface of the porous filter to accommodate the porous filter and pressed into the discharge hole.

6. In Paragraph 5, The above sleeve is a compressor comprising a projection provided so that the filter portion is fixed to the discharge hole.

7. In Paragraph 5, A compressor having a toothed portion provided on the outer surface of the sleeve.

8. In Paragraph 5, The above sleeve is a compressor comprising plastic or rubber material.

9. In Paragraph 1, A compressor in which one surface of the filter portion is provided in a conical or tapered shape so as to be easily inserted into the discharge hole.

10. In Paragraph 1, The above filter section is a first filter section, and A compressor further comprising a second filter section inserted into an oil cap including the above-mentioned suction hole to filter foreign substances in the oil.

11. In Paragraph 10, The above second filter section is a compressor including a porous filter.

12. In Paragraph 10, The above second filter section is a compressor including a magnet.

13. In Paragraph 1, A compressor further comprising a third filter section provided around the suction hole to prevent foreign substances in the oil from entering the oil passage.

14. In Paragraph 13, The above third filter section is a compressor including a porous filter.

15. In Paragraph 1, A compressor further comprising a filter cap provided around the suction hole to prevent foreign substances in the oil from entering the oil passage.

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