Hermetic compressor and refrigerator having same

Abstract

This refrigerator comprises a cold air supply device for supplying cold air to a storage compartment, the cold air supply device including a compressor. The compressor may include a compression unit, a motor unit, a crankshaft, and a connecting rod. The compression unit compresses a refrigerant by the reciprocating motion of a piston. The crankshaft has one end that is connected to the motor unit and is rotated thereby. A crank pin eccentric with respect to the rotational shaft is provided at the other end of the crankshaft. The connecting rod connects the crank pin with the piston to convert the rotational motion of the crankshaft into the reciprocating motion of the piston. A first opening through which lubricating oil is discharged and a scattering unit that collects and scatters the lubricating oil discharged from the first opening by centrifugal force are provided at an end of the crank pin.

Description

Hermetic compressor and refrigerator equipped with same

[0001] The present disclosure relates to a hermetic compressor and a refrigerator having the same.

[0002] A hermetic compressor disclosed in Japanese Patent Laid-Open No. 60-252178 comprises a casing, a compression device disposed in an upper region within the casing, and an electric motor disposed in a lower region within the casing. A crank pin is provided at an end of a shaft extending upward from the electric motor. A piston of the compression device is connected to the crank pin by a connecting rod. An opening is provided on the crank pin for spraying lubricating oil. A cylindrical portion rotatably surrounding the crank pin is provided at one end of the connecting rod, and a skirt portion that is diagonally expanded radially outwardly is provided at the upper end of the cylindrical portion. Lubricating oil coming out from the opening of the crank pin strikes the inner inclined surface of the skirt portion.

[0003] According to one aspect of the present disclosure, a refrigerator includes a main body having at least one storage compartment, and a cold air supply device including a compressor for supplying cold air to the storage compartment. The compressor may include a compression unit, an electric motor, a crank shaft, and a connecting rod. The compression unit compresses a refrigerant by reciprocating movement of a piston. The electric motor rotates the crank shaft. One end of the crank shaft is connected to the electric motor. A crank pin eccentric with respect to a rotational axis is provided at the other end of the crank shaft. The connecting rod connects the crank pin and the piston to convert the rotational motion of the crank shaft into the reciprocating motion of the piston. A first opening through which lubricating oil is discharged is provided at an end of the crank pin, and a scattering unit is provided for collecting and scattering the lubricating oil discharged from the first opening by centrifugal force.

[0004] A compressor according to one aspect of the present disclosure may include a compression unit, a transmission unit, a crankshaft, and a connecting rod. The compression unit compresses refrigerant by reciprocating movement of a piston. The transmission unit rotates the crankshaft. One end of the crankshaft is connected to the transmission unit. A crank pin eccentric with respect to a rotational axis is provided at the other end of the crankshaft. The connecting rod connects the crank pin and the piston to convert the rotational motion of the crankshaft into the reciprocating motion of the piston. A first opening through which lubricating oil is discharged is provided at an end of the crank pin, and a scattering unit is provided for collecting and scattering the lubricating oil discharged from the first opening by centrifugal force.

[0005] FIG. 1 is a schematic cross-sectional view of a hermetic compressor according to one embodiment of the present disclosure.

[0006] FIG. 2 is a schematic perspective view showing an attachment mounted on a crank pin according to one embodiment of the present disclosure.

[0007] Figure 3 is a top view of a hermetic compressor according to one embodiment of the present disclosure, showing a state in which the piston is positioned at the bottom dead center.

[0008] FIG. 4 is a top view of a hermetic compressor according to one embodiment of the present disclosure, showing a state where the piston is positioned at top dead center.

[0009] FIG. 5 is a schematic top view of a hermetic compressor according to one embodiment of the present disclosure, showing a case where the piston is at the bottom dead center position.

[0010] FIG. 6 is a schematic top view of a hermetic compressor according to one embodiment of the present disclosure, showing a case where the piston is at the top dead center.

[0011] FIG. 7 is a schematic perspective view showing a notch formed in a crank pin in a hermetic compressor according to one embodiment of the present disclosure.

[0012] FIG. 8 is a schematic perspective view showing a balance weight mounted on a crank pin in a hermetic compressor according to one embodiment of the present disclosure, wherein a flying part is provided.

[0013] Figure 9 is a schematic diagram of a refrigerator according to one embodiment of the present disclosure.

[0014] It should be understood that the various embodiments of the present disclosure and the terminology used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, but rather to encompass various modifications, equivalents, and / or substitutes of the embodiments.

[0015] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0016] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0017] In this disclosure, each of the phrases "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.

[0018] The term "and / or" includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0019] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not qualify the components in any other respect (e.g., importance or order).

[0020] In addition, terms such as 'front', 'rear', 'top', 'bottom', 'side', 'left', 'right', 'upper', and 'lower' used in the present disclosure are defined based on the drawings, and the shape and position of each component are not limited by these terms.

[0021] Terms such as "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the present disclosure, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0022] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0023] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0024] A refrigerator is equipped with a cold air supply device for supplying cold air to a storage compartment. The cold air supply device can generate cold air through a refrigeration cycle that includes the processes of compression, condensation, expansion, and evaporation of a refrigerant. The cold air supply device may include a refrigeration cycle device having a compressor, a condenser, an expansion device, and an evaporator capable of driving the refrigeration cycle. The compressor is disposed between the evaporator and the condenser. The compressor compresses refrigerant introduced from the evaporator and discharges it to the condenser. The compressor includes a compression device and a motor for driving the compression device. The compression device may be a reciprocating compression device including a piston. The compressor may have a structure that sprays lubricating oil through a crank pin eccentrically provided at one end of the motor's rotational shaft. In this case, the spraying of the lubricating oil depends on the rotational speed of the motor's rotational shaft. If the motor is operated at a low speed, the lubricating oil may become difficult to spray. This holds true even if a skirt portion that expands outward is disposed at the end of the crank pin, as in the prior art.

[0025] The present disclosure aims to provide a hermetic compressor having a structure that allows lubricant to easily disperse even during low-speed operation, and a refrigerator employing the compressor. However, the technical challenges to be achieved by the present disclosure are not limited to the technical challenges mentioned above, and other technical challenges not mentioned will be clearly understood by those skilled in the art to which the present disclosure pertains, based on the description below.

[0026] FIG. 1 is a schematic cross-sectional view of a hermetic compressor (1) according to one embodiment of the present disclosure. Referring to FIG. 1, the hermetic compressor (1) may include a compression device (compression unit) (20) and a drive motor (electric unit) (30). The hermetic compressor (1) may include a sealed container (10) forming a sealed space therein. The compression device (20) and the drive motor (30) may be installed within the sealed space. The compression device (20) is driven by the drive motor (30) to compress a refrigerant.

[0027] The compression device (20) may be a reciprocating compression device. The compression device (20) may be provided with a frame (21), a cylinder (22), and a compression chamber (23). The compression device (20) may further be provided with a piston (24), a cylinder head (25), and a valve device (26). The compression device (compression unit) (20) is installed in an upper region within a sealed container (10) and compresses the refrigerant by the reciprocating movement of the piston (24).

[0028] The cylinder (22) can be formed integrally with the frame (21). A piston (24) is accommodated in the cylinder (22) through an open end of the cylinder (22). The piston (24) closes the open end of the cylinder (22). A cylinder head (25) is coupled to the other end of the cylinder (22). The cylinder head (25) seals the other end of the cylinder (22). A compression chamber (23) is formed between the piston (24) and the cylinder head (25) inside the cylinder (22). The piston (24) can be linearly reciprocated within the cylinder (22). As the piston (24) linearly reciprocates, the volume of the compression chamber (23) changes, and the refrigerant is sucked into the compression chamber (23), compressed, and discharged from the compression chamber (23).

[0029] The cylinder head (25) may have a refrigerant suction chamber (251) and a refrigerant discharge chamber (252). The refrigerant is sucked into the compression chamber (23) through the refrigerant suction chamber (251) via a suction pipe (not shown). The refrigerant is discharged from the compression chamber (23) through the refrigerant discharge chamber (252) via a discharge pipe (not shown). Although not shown in the drawing, the suction pipe and the discharge pipe may be arranged on one side of the sealed container (10). The suction pipe leads the refrigerant from the evaporator (not shown) of the refrigeration cycle to the sealed container (10). The discharge pipe leads the refrigerant from the sealed container (10) to the condenser (not shown) of the refrigeration cycle.

[0030] A valve device (26) is interposed between the cylinder (22) and the cylinder head (25). The valve device (26) controls the flow of refrigerant sucked into the compression chamber (23) from the refrigerant suction chamber (251). The valve device (26) also controls the flow of refrigerant discharged from the compression chamber (23) to the refrigerant discharge chamber (252).

[0031] The drive motor (30) has a stator (31) and a rotor (32). The stator (31) is fixed to the frame (21) so as to face the compression device (20). The stator (31) forms a magnetic field. The rotor (32) is installed on the outside of the stator (31) so as to be rotatable while being spaced apart from the stator (31). The rotor (32) rotates by electromagnetic interaction with the stator (31).

[0032] The drive motor (30) causes the piston (24) to reciprocate linearly so that the compression device (20) compresses the refrigerant. To this end, the drive motor (30) rotates the crankshaft (33), and the rotational motion of the crankshaft (33) is converted into the linear reciprocating motion of the piston (24) by the crank pin (34) and the connecting rod (28).

[0033] The drive motor (30) is connected to a crankshaft (33), and the crankshaft (33) is connected to a compression device (20). The crankshaft (33) is inserted into a hollow portion (27) formed in the center of the frame (21) and is rotatably supported therein. One end (e.g., a lower end) (331) of the crankshaft (33) is coupled to a bottom end (321) of the rotor (32) so that the crankshaft (33) rotates together with the rotor (32). The other end (e.g., an upper end) (332) of the crankshaft (33) protrudes upward from the frame (21). A crank pin (34) is provided on the protruding other end (332) of the crankshaft (33). The crank pin (34) is eccentric with respect to the rotation axis (Z) of the crankshaft (33). Therefore, when the rotor (32) rotates, the crank pin (34) rotates eccentrically around the rotation axis (Z) of the crank shaft (33). The connecting rod (28) converts the eccentric rotational motion of the crank pin (34) into a linear reciprocating motion of the piston (24). The crank pin (34) is connected to the connecting rod (28), and the connecting rod (28) is connected to the piston (24).

[0034] When current is applied to the drive motor (30) of the hermetic compressor (1), the stator (31) generates a magnetic field, and the rotor (32) rotates by electromagnetic interaction with the stator (31). Accordingly, the crank pin (34) of the crankshaft (33) rotates eccentrically around the rotation axis (Z) of the crankshaft (33). The eccentric rotation of the crank pin (34) is converted into a linear reciprocating motion of the piston (24) inside the compression chamber (23) through the connecting rod (28). The linear reciprocating motion of the piston (24) generates a pressure difference between the inside and the outside of the compression chamber (23). As the piston (24) moves away from the cylinder head (25), the volume of the compression chamber (23) increases. Refrigerant introduced into the refrigerant suction chamber (251) through the suction pipe from the evaporator of the refrigeration cycle is sucked into the compression chamber (23). As the piston (24) approaches the cylinder head (25), the volume of the compression chamber (23) decreases and the refrigerant is compressed within the compression chamber (23). The compressed refrigerant is discharged from the compression chamber (23) to the refrigerant discharge chamber (252), and the discharged refrigerant is discharged from the refrigerant discharge chamber (252) to the condenser of the refrigeration cycle through a discharge pipe.

[0035] In a hermetic compressor (1), lubricating oil (hereinafter simply referred to as “oil”) is supplied to the moving parts of the compression device (20) and the drive motor (30) for lubrication and cooling. Lubrication and cooling of the moving parts are performed to prevent wear due to excessive friction between the moving parts. For this purpose, an oil storage space (11) in which a predetermined amount of oil is stored is provided at the bottom of the hermetic container (10).

[0036] A pump, for example, a viscous pump (36), which sucks up oil from an oil storage space (11) is installed at the bottom of the crankshaft (33). The viscous pump (36) may have a cylindrical shape with grooves formed on its outer periphery. The viscous pump (36) sucks up oil from the oil storage space (11) by the viscosity of the oil that comes into contact with the grooves. Since Fig. 1 is a cross-sectional view, only the portion of the grooves that intersect the cut surface is shown.

[0037] Here, the lubrication and cooling of the moving part between the cylinder (22) and the piston (24) will be described. For the lubrication and cooling of the moving part, an oil passage (35) is provided in the crankshaft (33). The oil passage (35) is a passage that guides oil from the oil storage space (11) to the crank pin (34). A pump, for example, a centrifugal pump (37), which guides the oil from the oil storage space (11) to the moving part may be installed in the crankshaft (33). The centrifugal pump (37) guides the oil from the oil storage space (11) to the moving part by using centrifugal force caused by the rotation of the crankshaft (33). The centrifugal pump (37) may include a spirally formed groove portion that is inclined upward in the opposite direction to the rotational direction of the crankshaft (33). Since Fig. 1 is a cross-sectional view, only the portion of the spirally formed groove portion of the centrifugal pump (37) that intersects the cross-section is shown. The upper end of the centrifugal pump (37) communicates with the lower end of the oil passage (35), and the lower end of the centrifugal pump (37) communicates with the upper end of the viscous pump (36). The viscous pump (36) provides a path for pumping oil from the oil storage space (11) and guiding it to the centrifugal pump (37). Accordingly, the oil flows through the centrifugal pump (37) into the oil passage (35) by the centrifugal force of the crankshaft (33). The oil flows from the oil passage (35) to the crank pin (34). Furthermore, the oil is sprayed from the first opening (341) of the crank pin (34) to the moving part to cool and lubricate the moving part.

[0038] In this way, in a reciprocating compressor such as a hermetic compressor (1), oil is supplied to the outer periphery of the piston (24). Specifically, oil is supplied to the outer periphery of the piston (24) by spraying oil from the first opening (341) at the upper portion of the crank pin (34).

[0039] In order to save energy, the rotation speed of the crankshaft (33) may need to be reduced. When the rotation speed of the crankshaft (33) is reduced, the centrifugal force decreases, making it difficult for the oil to scatter. Considering this, according to an exemplary embodiment of the present disclosure, a scattering member is provided to collect and scatter the oil discharged from the first opening (341) of the crank pin (34). The scattering member may be provided directly on the crank pin (34), or may be provided on an additional member that is integrally provided with the crank pin (34) or is mounted as a separate member. The additional member may be an additional member for the purpose of scattering the oil. The additional member may be an additional member for a purpose other than the purpose of scattering the oil.

[0040] As one embodiment, an attachment (40) is provided as an additional member for the purpose of scattering oil on the upper portion of the crank pin (34). A scattering portion, for example, a protrusion (401), for scattering oil is provided at at least one location on the outer periphery of the attachment (40). The attachment (40) may be integral with the crank pin (34), or may be mounted on the upper portion of the crank pin (34) as a separate member.

[0041] Fig. 2 is a schematic perspective view showing a state in which an attachment (40) is mounted on a crank pin (34). Referring to Fig. 2, the outer diameter of the attachment (40) may be larger than the outer diameter of the crank pin (34). The attachment (40) may have a second opening (402) and a protrusion (401). The second opening (402) of the attachment (40) has a larger diameter than the first opening (341) of the crank pin (34) and is in communication with the first opening (341) of the crank pin (34). The upper end of the crank pin (34) is inserted into the second opening (402) of the attachment (40). In the present embodiment, the second opening (402) of the attachment (40) is aligned vertically with the first opening (341) of the crank pin (34). The protrusion (401) may be provided to protrude radially outward at one or more locations on the outer circumference (403) of the second opening (402) of the attachment (40). The second opening (402) is partially extended radially outward by the protrusion (401). The protrusion (401) may have a so-called injection port shape (or beak shape). The protrusion (401) may be provided, for example, at an eccentric vertex of the outer circumference (403) of the second opening (402).

[0042] According to the attachment (40) having a protrusion (401) in the shape of an injection port, oil supplied to the crank pin (34) is collected on the protrusion (401) by centrifugal force. The outer diameter of the outermost end of the protrusion (401) is larger than the outer diameter of the crank pin (34). Therefore, the oil is sprayed by a large centrifugal force from a portion having a larger outer diameter than the first opening (341) of the crank pin (34). Therefore, since the oil is more likely to spray even during low-speed operation, lubrication and cooling of a moving part, for example, a sliding part between a piston (24) and a cylinder (22), are facilitated, and the reliability of the moving part can be improved.

[0043] As illustrated in FIG. 2, the protrusion (401) may have a first side portion (4011) and a second side portion (4012). The first side portion (401) and the second side portion (402) may be formed to define opposite sides of a truncated cone-shaped injection port, respectively.

[0044] Although not shown in the drawing, instead of the protrusion (401), a notch (not shown) may be formed on the outer periphery (403) of the second opening (402) of the attachment (40) as a non-mounted portion. The notch may be, for example, a V-shaped concave shape downward on the outer periphery (403) of the second opening (402) of the attachment (40) (see the shape of the notch (411) shown in FIG. 7). In addition, the number of protrusions (401) or notches may be two or more. Two or more protrusions (401) or notches may be provided on a portion of the outer periphery (403) of the second opening (402) of the attachment (40), for example, near the eccentric vertex.

[0045] Oil is sprayed outward from the eccentric vertex of the crank pin (34) with respect to the rotation axis (Z) of the crank shaft (33) (hereinafter referred to as “eccentric vertex”). Here, the eccentric vertex is the point at which the outer diameter becomes maximum when the crank pin (34) rotates around the rotation axis (Z). In other words, the eccentric vertex is the point at which the distance from the rotation axis (Z) of the crank shaft (33) is the maximum among the points on the outer periphery of the crank pin (34). The centrifugal force increases as the eccentric radius increases. Therefore, it is efficient for oil spray to provide the protrusion (401) of the attachment (40) at the position of the eccentric vertex.

[0046] Although the crank pin (34) and the attachment (40) presented as an additional member are generally described herein as separate components that may or may not be integral with each other, this is not required and other embodiments are possible. For example, in some embodiments, the crank pin (34) and the attachment (40) are provided as a crank pin assembly. In these or other cases, the crank pin assembly may include the crank pin (34), the attachment (40), a first opening (341) through which lubricant is discharged, a second opening, and a fly portion (i.e., a protrusion (401)).

[0047] FIG. 3 is a top view of a hermetic compressor (1) according to one embodiment of the present disclosure, showing a state in which the piston (24) is positioned at the bottom dead center. FIG. 4 is a top view of a hermetic compressor (1) according to one embodiment of the present disclosure, showing a state in which the piston (24) is positioned at the top dead center. The protrusion (401) of the attachment (40) always faces radially outward of a circle (C) centered on the rotation axis (Z). For example, in the state of FIG. 3, the protrusion (401) of the attachment (40) faces the opposite side of the piston (24) in the radial direction of the circle (C). In the state of FIG. 4, the protrusion (401) of the attachment (40) faces the piston (24) side in the radial direction of the circle (C). That is, the protrusion (401) of the attachment (40) always faces the direction of the centrifugal force generated when the crank pin (34) rotates around the rotation axis (Z).

[0048] In a reciprocating compressor, the current minimum rotation speed of the crankshaft (33) can be lowered to a lower target minimum rotation speed from the viewpoint of energy saving.

[0049] According to the experiment, when the attachment (40) is not applied, the oil is sprayed to the piston (24) at the current minimum rotation speed. However, the oil spray limit is reached at a predetermined speed (a predetermined rotation speed between the current minimum rotation speed and the target minimum rotation speed) that is faster than the target minimum rotation speed. At the target minimum rotation speed, the oil is in a discharge state (a state in which the oil does not spray and flows out from the first opening (341) of the crank pin (34)) and does not reach the piston (24).

[0050] In this regard, when an attachment (40) as shown in Fig. 2 is applied, oil is sprayed from the protrusion (401) even at a predetermined rotation speed that is slower than the target minimum rotation speed. And, at the target minimum rotation speed, the oil is sprayed and sufficiently reaches the sliding part between the piston (24) and the cylinder (22).

[0051] When the piston (24) is at the bottom dead center position as shown in Fig. 3, the piston (24) is most exposed outside the cylinder (22). The crank pin (34) is positioned radially opposite the piston (24) with respect to the rotation axis (Z). In this case, the oil spray direction is outward from the eccentric apex of the crank pin (34) and in the opposite direction of the piston (24). Therefore, the sprayed oil does not face the piston (24).

[0052] As shown in Fig. 4, when the piston (24) is at the top dead center, the oil is sprayed toward the piston (24). However, in this case, the piston (24) is most deeply inserted into the cylinder (22). Therefore, the sprayed oil is caught on the edge portion (221) of the crank pin (34) side of the cylinder (22). In the state shown in Fig. 4, when the crank pin (34) rotates further, the piston (24) begins to be exposed from the cylinder (22), and the oil flows from the edge portion (221) and reaches the piston (24) exposed to the outside of the cylinder (22). That is, the sprayed oil reaches the piston (24) as the crank pin (34) rotates, although delayed. However, shortening the time from when the oil is sprayed until the piston (24) is exposed to the outside makes it easier for the oil to reach the piston (24).

[0053] Taking this into account, the position of the protrusion (401) of the attachment (40) can be slightly shifted from the eccentric apex of the crank pin (34) in the opposite direction of the rotational direction of the crank shaft (33).

[0054] FIG. 5 is a schematic top view of a hermetic compressor (1) according to one embodiment of the present disclosure, showing a case where the piston (24) is at the bottom dead center. FIG. 6 is a schematic top view of a hermetic compressor (1) according to one embodiment of the present disclosure, showing a case where the piston (24) is at the top dead center. Referring to FIGS. 5 and 6, each position of the protrusion (401) with respect to the center of the crank pin (34) is misaligned in the opposite direction to the rotational direction of the crankshaft (33) compared to the embodiment illustrated in FIGS. 3 and 4. Specifically, each position of the protrusion (401) is misaligned by an angle (θ) in the opposite direction to the rotational direction of the crankshaft (33) from the eccentric vertex (EC). Here, when the angle (θ) is within a predetermined angle, oil splashes from the protrusion (401) due to viscosity. On the other hand, when the angle (θ) exceeds the predetermined angle, oil splashes from the eccentric vertex (EC). Therefore, the angle (θ) may be an angle that does not impair the oil's scattering performance.

[0055] In an alternative embodiment, the base of the protrusion (401) adjacent to the crank pin (34) may be aligned with the eccentric vertex of the crank pin (34) and the end of the protrusion (401) away from the crank pin (34) may be offset from the eccentric vertex of the crank pin (34) similar to the configuration illustrated in FIG. 5. In this or other cases, the protrusion (401) may be cantilevered more toward one side than the other or may be tapered more toward one side.

[0056] A notch (411) may be formed on the crank pin (34). Fig. 7 is a schematic perspective view showing a state in which a notch (411) is formed on the crank pin (34) in the compressor (1) according to one embodiment of the present disclosure. Referring to Fig. 7, a notch, for example, a notch (411), is formed at one location on the outer periphery (343) of the first opening (341) of the crank pin (34). The notch (411) may be formed concavely in a V shape downward from the upper end of the outer periphery (343) of the first opening (341) of the crank pin (34). The notch (411) may be formed at the position of the eccentric vertex of the outer periphery (343) of the first opening (341) of the crank pin (34). Although not shown in the drawing, as described for the protrusion (401) in FIGS. 5 and 6, the notch (411) may be provided at a position that is offset from the position of the eccentric apex of the crank pin (34) in the opposite direction of rotation of the crank shaft (33).

[0057] By providing a notch (411) at one location on the outer circumference of the crank pin (34), oil can easily gather in the notch (411) by centrifugal force, and the oil can easily fly out from the notch (411). In addition, there is an advantage in that costs can be reduced because additional components such as an attachment (40) become unnecessary.

[0058] The number of notches (411) is not limited to one and may be two or more. In this case, the crank pin (34) may be provided with two or more notches (411) in a portion of the outer circumference (343), for example, near the position of the eccentric peak.

[0059] The scattering member may be provided on the crank pin (34) instead of the attachment (40), or on another additional member that is installed for purposes other than oil scattering. For example, a balance weight may be installed on the crank pin (34). The balance weight is a weight for suppressing vibrations that occur during rotation due to weight imbalance of the crank shaft (33). In one embodiment, the scattering member may be provided on the balance weight.

[0060] FIG. 8 is a schematic perspective view showing a state in which a balance weight (42) mounted on a crank pin (34) is provided with a flying part in a compressor (1) according to one embodiment of the present disclosure. Referring to FIG. 8, a second opening (422) is provided in the balance weight (42). The upper end of the crank pin (34) is inserted into the second opening (422), so that the balance weight (42) can be fixed to the crank pin (34). The second opening (422) communicates with the first opening (341) of the crank pin (34). The upper end of the outer periphery (423) of the second opening (422) may protrude slightly beyond the upper end of the crank pin (34). A notch (421) is formed at one location of the outer periphery (423) of the second opening (422). The notch (421) may be formed, for example, in a V-shape downward from the upper end of the outer circumference (423) of the second opening (422). The notch (421) may be formed at the position of the eccentric apex of the second opening (422) of the balance weight (42). The notch (421) may also be provided at a position that is offset from the position of the eccentric apex of the second opening (422) of the balance weight (42) in the opposite direction of the rotational direction of the crank shaft (33).

[0061] By providing a notch (421) at one location of the outer circumference (423) of the second opening (422) of the balance weight (42) in this way, oil can easily gather in the notch (421) by centrifugal force, and the oil can easily scatter from the notch (421). In addition, since the scattering part is formed on a member added for a purpose other than scattering oil (for example, for the purpose of preventing vibration due to weight imbalance), oil scattering can be facilitated without increasing the number of parts of the compressor (1).

[0062] The number of notches (421) is not limited to one and may be two or more. In this case, two or more notches (421) may be provided in a portion of the outer circumference (423) of the second opening (422), for example, near the position of the eccentric vertex. In addition, although not shown in the drawing, instead of the notches (421), one or more protrusions (401) as shown in FIG. 2 may be provided as a non-slip portion on the outer circumference (423) of the second opening (422).

[0063] FIG. 9 is a schematic diagram of a refrigerator according to one embodiment of the present disclosure. Referring to FIG. 9, the refrigerator may include a main body (1000) having at least one storage compartment (1001) and a cold air supply device (1002) that supplies cold air (cold heat) to the storage compartment (1001). The cold air supply device (1002) may include the compressor (1) described above.

[0064] For example, the main body (1000) may include an inner case, an outer case disposed on the outside of the inner case, and an insulating material provided between the inner cases and the outer cases. The "inner case" may include at least one of a case, a plate, a panel, or a liner forming a storage compartment. The inner case may be formed as a single body, or may be formed by assembling a plurality of plates. The "outer case" may form the exterior of the main body (1000), and may be coupled to the outside of the inner case so that an insulating material is disposed between the inner cases and the outer cases.

[0065] "Insulation" can insulate the interior and exterior of a storage room so that the temperature inside the storage room can be maintained at a set temperature without being affected by the external environment. In one embodiment, the insulation can include foam insulation. The foam insulation can be formed by injecting and foaming urethane foam, a mixture of polyurethane and a foaming agent, between the inner and outer layers.

[0066] In one embodiment, the insulation may include a vacuum insulation material in addition to the foam insulation, or the insulation may consist solely of the vacuum insulation material instead of the foam insulation. The vacuum insulation material may include a core material and an outer shell material that accommodates the core material and seals the interior under a vacuum or near-vacuum pressure. However, the insulation material is not limited to the foam insulation or vacuum insulation material described above, and may include various materials that can be used for insulation.

[0067] The storage room (1001) may include a space defined by an inner wall. The storage room (1001) may further include an inner wall defining a space corresponding to the storage room (1001). Various items such as food, medicine, and cosmetics may be stored in the storage room (1001), and the storage room (1001) may be formed so that at least one side is open for taking items in and out.

[0068] A refrigerator may include one or more storage compartments (1001). When two or more storage compartments (1001) are formed in the refrigerator, each storage compartment (1001) may have a different purpose and may be maintained at a different temperature. To this end, each storage compartment (1001) may be separated from each other by a partition wall containing insulating material.

[0069] The storage room (1001) may be provided to be maintained at an appropriate temperature range depending on the intended use, and may include a "refrigerator," a "freezer," or a "variable temperature room" that are distinguished depending on the intended use and / or temperature range. The refrigerator may be maintained at an appropriate temperature for refrigerating items, and the freezer may be maintained at an appropriate temperature for freezing items. "Refrigeration" may mean cooling items to a temperature that does not freeze them, and for example, the refrigerator may be maintained at a temperature ranging from 0 degrees Celsius to +7 degrees Celsius. "Freezing" may mean cooling items to freeze them or keep them in a frozen state, and for example, the freezer may be maintained at a temperature ranging from -20 degrees Celsius to -1 degree Celsius. The variable temperature room may be used as either a refrigerator or a freezer, at the user's choice or regardless.

[0070] The storage room (1001) may be called by various names, such as “refrigerator,” “freezer,” and “variable temperature room,” as well as “vegetable room,” “fresh room,” “cooling room,” and “ice room,” and the terms “refrigerator,” “freezer,” and “variable temperature room” used hereinafter should be understood to encompass the storage room (1001) having the corresponding purpose and temperature range.

[0071] According to one embodiment, the refrigerator may include at least one door (1003) configured to open and close an open side of a storage compartment (1001). The door (1003) may be provided to open and close each of one or more storage compartments (1001), or one door (1003) may be provided to open and close a plurality of storage compartments (1001). The door (1003) may be installed on the front of the main body (1000) in a rotatable or slidable manner.

[0072] The door (1003) may be configured to seal the storage compartment when the door (1003) is closed. The door (1003) may include insulation, similar to the body, to insulate the storage compartment when the door (1003) is closed.

[0073] According to one embodiment, the door (1003) may include a door outer panel forming the front of the door (1003), a door inner panel forming the back of the door (1003) and facing the storage compartment (1001), an upper cap, a lower cap, and door insulation provided inside these.

[0074] The edge of the door inner panel may be provided with a gasket that seals the storage compartment (1001) by being pressed against the front of the main body (1000) when the door (1003) is closed. The door inner panel may include a dyke that protrudes rearward to accommodate a door basket for storing items.

[0075] According to one embodiment, the door (1003) may include a door body and a front panel detachably coupled to the front side of the door body and forming the front of the door (1003). The door body may include a door outer panel forming the front of the door body, a door inner panel forming the rear of the door body and facing the storage compartment, an upper cap, a lower cap, and a door insulation material provided inside these.

[0076] The refrigerator can be classified into a French door type, a side-by-side type, a bottom mounted freezer (BMF), a top mounted freezer (TMF), or a single-door refrigerator depending on the arrangement of the door (1003) and the storage compartment (1001).

[0077] In one embodiment, the refrigerator may include a cold air supply device (1002) configured to supply cold air to the storage compartment (1001). The cold air supply device (1002) may include a machine, mechanism, electronic device, and / or a system combining these that can generate cold air and guide the cold air to cool the storage compartment (1001). In one embodiment, the cold air supply device may generate cold air through a refrigeration cycle that includes compression, condensation, expansion, and evaporation processes of a refrigerant. To this end, the cold air supply device may include a refrigeration cycle device having a compressor (Fig. 1: 1) capable of driving the refrigeration cycle, a condenser, an expansion device, and an evaporator.

[0078] According to one embodiment, the refrigerator may include a machine room in which at least some components belonging to a cold air supply device (1002) are arranged. The "machine room" may be arranged to be partitioned and insulated from the storage room (1001) to prevent heat generated from the components arranged in the machine room from being transferred to the storage room (1001). The interior of the machine room may be configured to communicate with the exterior of the main body (1000) to dissipate heat from the components arranged inside the machine room.

[0079] In one embodiment, the refrigerator may include a dispenser provided on the door to provide water and / or ice. The dispenser may be provided on the door so that it is accessible to a user without having to open the door.

[0080] In one embodiment, a refrigerator may include an ice-making device configured to produce ice. The ice-making device may include an ice-making tray configured to store water, an ice-separating device configured to separate ice from the ice-making tray, and an ice bucket configured to store ice produced in the ice-making tray.

[0081] According to one embodiment, the refrigerator may include a control unit (1004) for controlling the refrigerator.

[0082] The control unit (1004) may include a memory (1006) that stores or memorizes a program and / or data for controlling the refrigerator, and a processor (1005) that outputs a control signal for controlling a cold air supply device, etc. according to the program and / or data stored in the memory (1006).

[0083] The memory (1006) stores or records various information, data, commands, programs, etc. necessary for the operation of the refrigerator. The memory (1006) can store temporary data generated during the process of generating control signals for controlling components included in the refrigerator. The memory (1006) may include at least one of volatile memory and non-volatile memory, or a combination thereof.

[0084] The processor (1005) controls the overall operation of the refrigerator. The processor (1005) can control components of the refrigerator by executing a program stored in the memory (1006). The processor (1005) may include a separate NPU that performs the operation of an artificial intelligence model. In addition, the processor (1005) may include a central processing unit, a graphics processor (GPU), etc. The processor (1005) may generate a control signal for controlling the operation of the cold air supply device (1002). For example, the processor (1005) may receive temperature information of the storage compartment (1001) from a temperature sensor and generate a cooling control signal for controlling the operation of the cold air supply device (1002) based on the temperature information of the storage compartment (1001).

[0085] In addition, the processor (1005) can process user input of the user interface and control the operation of the user interface according to the program and / or data stored / stored in the memory (1006). The user interface can be provided using an input interface and an output interface. The processor (1005) can receive user input from the user interface. In addition, the processor (1005) can transmit a display control signal and image data for displaying an image on the user interface in response to the user input to the user interface.

[0086] The processor (1005) and memory (1006) may be provided as a single unit or separately. The processor (1005) may include one or more processors. For example, the processor (1005) may include a main processor and at least one sub-processor. The memory (1006) may include one or more memories.

[0087] According to one embodiment, the refrigerator may include a processor (1005) and a memory (1006) that control all components included in the refrigerator, and may include multiple processors and multiple memories that individually control the components of the refrigerator. For example, the refrigerator may include a processor and a memory that control the operation of a cold air supply device (1002) based on the output of a temperature sensor. Additionally, the refrigerator may separately include a processor and a memory that control the operation of a user interface based on user input.

[0088] The communication module can communicate with external devices, such as servers, mobile devices, and other home appliances, via a nearby access point (AP). The AP can connect the local area network (LAN) to which the refrigerator or user device is connected to the wide area network (WAN) to which the server is connected. The refrigerator or user device can then connect to the server via the WAN.

[0089] The input interface may include keys, a touchscreen, a microphone, etc. The input interface may receive user input and transmit it to the processor.

[0090] The output interface may include a display, a speaker, etc. The output interface may output various notifications, messages, information, etc. generated by the processor.

[0091] The present disclosure provides a compressor capable of stably supplying lubricating oil to a moving part even when the crank shaft of the compressor rotates at low speed, and a refrigerator employing the same.

[0092] A refrigerator according to one aspect of the present disclosure includes a main body having at least one storage compartment, and a cold air supply device including a compressor for supplying cold air to the storage compartment. The compressor may include a compression unit for compressing a refrigerant by reciprocating movement of a piston, an electric unit, a crankshaft having one end connected to the electric unit and rotating, and a crank pin provided at the other end that is eccentric with respect to a rotational axis, and a connecting rod for connecting the crank pin and the piston to convert the rotational motion of the crankshaft into the reciprocating motion of the piston. A first opening for discharging lubricant and a scattering unit for collecting and scattering lubricant discharged from the first opening by centrifugal force are provided at an end of the crank pin.

[0093] According to this configuration, the lubricating oil discharged from the first opening by centrifugal force is collected in the scattering section and then scatters from the scattering section, so that the lubricating oil can be easily scattered even when the crankshaft rotates at low speed.

[0094] As an example, the scattering member may be provided at a position corresponding to an eccentric peak of the outer circumference of the first opening. Accordingly, a strong centrifugal force is applied at the eccentric peak, so that the lubricant can be effectively scattered.

[0095] In one embodiment, the flywheel may be provided at a position offset from the eccentric apex of the outer circumference of the first opening in the direction opposite to the rotational direction of the crankshaft. This allows lubricating oil to be supplied to the piston within a short period of time after the piston begins to move from the top dead center to the bottom dead center.

[0096] As an example, a plurality of the above-described non-mounted portions may be provided near positions corresponding to the eccentric vertices of the outer circumference of the first opening.

[0097] As an example, the flying part may include a notch formed in a V shape on the outer periphery of the first opening. This eliminates the need for a separate additional component for lubricant flying, thereby reducing costs.

[0098] As an example, the fly member may be provided on an additional member mounted on the end of the crank pin. This may enhance the degree of freedom in the shape, size, etc. of the fly member.

[0099] As an example, the additional member may be an additional member for scattering the lubricant, or may be an additional member for a purpose other than scattering the lubricant.

[0100] As one embodiment, the additional member may have a second opening into which the end of the crank pin is inserted and which is in communication with the first opening of the crank pin. The flying member may have a beak shape that protrudes radially outward from the outer periphery of the second opening, and may also include a notch that is concavely formed in a V shape on the outer periphery of the second opening.

[0101] A compressor according to one aspect of the present disclosure may include a compression unit that compresses a refrigerant by reciprocating movement of a piston, an electric unit, a crankshaft having one end connected to the electric unit and rotating and a crank pin provided at the other end that is eccentric with respect to a rotational axis, and a connecting rod that connects the crank pin and the piston to convert the rotational motion of the crankshaft into the reciprocating motion of the piston. A first opening through which lubricating oil is discharged is provided at an end of the crank pin, and a scattering unit is provided for collecting and scattering lubricating oil discharged from the first opening by centrifugal force.

[0102] As an example, the non-mounted portion may be provided at a position corresponding to an eccentric peak of the outer circumference of the first opening.

[0103] As an example, the non-mounted portion may be provided at a position that is offset in the opposite direction of the rotational direction of the crank shaft from a position corresponding to an eccentric peak of the outer circumference of the first opening.

[0104] As an example, the non-mounted portion may have a beak shape that protrudes outward in a radial direction from the outer periphery of the first opening.

[0105] As one embodiment, the compressor may include an additional member mounted to the end of the crank pin, the additional member having a second opening into which the end of the crank pin is inserted and communicating with the first opening of the crank pin. The flying member may be provided on the additional member.

[0106] The technical effects to be achieved in this document are not limited to the technical effects mentioned above, and other technical effects not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present disclosure pertains from the description of this document.

[0107] As described above, although the compressor of the present disclosure and the refrigerator employing the same have been described through limited embodiments and drawings, the present disclosure is not limited to the above-described embodiments, and various modifications are possible within a scope that does not deviate from the spirit thereof.

Claims

1. A main body (1000) having at least one storage room (1001); It includes a cold air supply device (1002) including a compressor (1) for supplying cold air (cold heat) to the above storage room (1001); The above compressor (1) is, A compression unit (20) that compresses the refrigerant by reciprocating movement of the piston (24); Electric part (30); and A crankshaft (33) having one end connected to the above-mentioned electric part and rotating, and having a crank pin (34) eccentric with respect to the rotation axis (Z) provided at the other end; It includes a connecting rod (28) that connects the crank pin and the piston to convert the rotational motion of the crank shaft into the reciprocating motion of the piston; A refrigerator having a first opening (341) through which lubricating oil is discharged at the end of the crank pin and a scattering portion for collecting and scattering the lubricating oil discharged from the first opening by centrifugal force.

2. In paragraph 1, A refrigerator in which the above-mentioned flying part is provided at a position corresponding to the eccentric vertex (EC) of the outer circumference (343) of the above-mentioned first opening (341).

3. In paragraph 1, A refrigerator in which the flywheel is provided at a position that is offset in the opposite direction of the rotational direction of the crankshaft from a position corresponding to the eccentric peak (EC) of the outer circumference of the first opening.

4. In paragraph 1, A refrigerator in which a plurality of the above-mentioned non-mounted parts are provided near a position corresponding to an eccentric vertex (EC) of the outer circumference (343) of the above-mentioned first opening.

5. In any one of paragraphs 1 to 4, A refrigerator in which the above-mentioned part includes a notch formed in a V shape on the outer periphery of the first opening of the above-mentioned crank pin.

6. In any one of paragraphs 1 to 4, A refrigerator in which the above-mentioned non-mounted part is provided on an additional member (40, 42) mounted on the end of the above-mentioned crank pin.

7. In paragraph 6, A refrigerator in which the above-mentioned additional member (40) is an additional member for scattering the lubricant.

8. In paragraph 6, A refrigerator in which the above-mentioned additional member (42) is an additional member for a purpose other than scattering the lubricant.

9. In any one of paragraphs 6 to 8, The above additional member (40) has a second opening (402) into which the end of the crank pin is inserted and which is connected to the first opening of the crank pin. A refrigerator in which the above-mentioned flying part is in the shape of a bird's beak protruding outward in a radial direction from the outer circumference (403) of the second opening (402).

10. In any one of paragraphs 6 to 8, The above-mentioned additional member has a second opening (422) into which the end of the above-mentioned crank pin is inserted and which is connected to the first opening of the above-mentioned crank pin, A refrigerator in which the above-mentioned non-mounted portion includes a notch formed in a V shape on the outer periphery (423) of the second opening.

11. Compression unit (20) that compresses refrigerant by reciprocating movement of piston (24); Electric part (30); and A crankshaft (33) having one end connected to the above-mentioned electric part and rotating, and having a crank pin (34) eccentric with respect to the rotation axis (Z) provided at the other end; It includes a connecting rod (28) that connects the crank pin and the piston to convert the rotational motion of the crank shaft into the reciprocating motion of the piston; A compressor having a first opening (341) through which lubricating oil is discharged at the end of the crank pin and a scattering section for collecting and scattering the lubricating oil discharged from the first opening by centrifugal force.

12. In paragraph 11, A compressor in which the above-mentioned flying part is provided at a position corresponding to the eccentric peak (EC) of the outer circumference (343) of the above-mentioned first opening (341).

13. In paragraph 11, A compressor in which the fly section is provided at a position that is offset in the opposite direction of the rotational direction of the crank shaft from a position corresponding to the eccentric peak (EC) of the outer circumference of the first opening.

14. In any one of paragraphs 11 to 13, A compressor in which the above-mentioned flying part is in the shape of a bird's beak protruding outward in a radial direction from the outer periphery (343) of the first opening (341).

15. In any one of paragraphs 11 to 14, An additional member is provided, wherein the end of the crank pin is inserted and has a second opening (402) that is connected to the first opening of the crank pin, and is mounted on the end of the crank pin; The above-mentioned non-mounted part is a compressor provided in the additional member (40, 42).

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