Compressor

Abstract

This compressor comprises: a cylinder including a chamber; a roller provided in the chamber and configured to compress a refrigerant in the chamber, the roller including a roller body, which can move, inside the chamber, along the inner surface of the cylinder, and a vane part, which extends from the roller body toward the cylinder, at least partially partitions the chamber to form an inlet chamber, in which the refrigerant can be accommodated, and a compression chamber, in which the refrigerant can be compressed, and moves along a radial direction of the roller body on the basis of the movement of the roller body; a bushing which is provided in the cylinder, can rotate relative to the cylinder, and covers at least a portion of the vane part, wherein the bushing supports the movement of the vane part along the radial direction; and a bushing cover which surrounds the bushing and can rotate along the rotational direction of the bushing.

Description

compressor

[0001] The present disclosure relates to a compressor having an improved structure.

[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. Types of compressors include reciprocating compressors, scroll compressors, and rotary compressors.

[0003] A reciprocating compressor compresses the working gas by forming a compression space between the piston and the cylinder where the working gas is drawn in and discharged, allowing the piston to reciprocate in a straight line inside the cylinder.

[0004] A scroll compressor compresses the working gas as the rotating scroll rotates along the stationary scroll by forming a compression space between the rotating scroll and the stationary scroll where the working gas is drawn in and discharged.

[0005] A rotary compressor compresses the working gas as the rolling piston rotates eccentrically along the inner wall of the cylinder by forming a compression space between the eccentrically rotating rolling piston and the cylinder, where the working gas is drawn in and discharged.

[0006] One aspect of the present disclosure provides a compressor having improved performance and reliability.

[0007] One aspect of the present disclosure provides a compressor capable of reducing friction loss occurring in a bushing coupled to a vane.

[0008] 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.

[0009] According to the present disclosure, a compressor comprises a cylinder including a chamber provided therein; a roller provided within the chamber and provided to compress a refrigerant received in the chamber, the roller comprising a roller body movable along an inner surface of the cylinder in the chamber; a roller extending from the roller body toward the cylinder and including a vane portion movable along the radial direction of the roller body to form an inlet chamber capable of receiving refrigerant and a compression chamber capable of compressing refrigerant, and extending at least partially partitioning the chamber to form an inlet chamber capable of receiving refrigerant and a compression chamber capable of compressing refrigerant based on the movement of the roller body; a bushing provided within the cylinder, rotatable with respect to the cylinder, and covering at least a portion of the vane portion, the bushing supporting the movement of the vane portion along the radial direction; and a bushing cover covering an outer surface of the bushing and rotatable along the rotational direction of the bushing, wherein the roller, the bushing, and the bushing cover support the movement of the bushing along the radial direction of the vane portion as the roller body moves along the inner surface, and the size of the inlet chamber is increased to move the refrigerant into the chamber, and the refrigerant moved into the chamber To compress, the size of the above compression chamber is reduced.

[0010] A compressor according to the concept of the present disclosure comprises: a cylinder having a cylinder chamber provided therein; a roller provided to compress a refrigerant contained in the cylinder chamber, the roller comprising a roller body provided to move along the inner surface of the cylinder in the cylinder chamber and a vane portion extending from the roller body toward the cylinder to partition the cylinder chamber; a bushing rotatably coupled to the cylinder and provided to have at least a portion of the vane portion inserted therein, the bushing comprising a first cover portion provided to cover one side of the vane portion, a second cover portion provided to cover another side provided opposite to the one side of the vane portion, and a connecting portion connecting the first cover portion and the second cover portion; and a bushing cover disposed between the cylinder and the bushing and provided to surround the outer surface of each of the first cover portion, the second cover portion, and the connecting portion.

[0011] A compressor according to the concept of the present disclosure comprises a cylinder, a plate provided on one side of the cylinder and forming a cylinder chamber together with the cylinder, a roller provided to compress a refrigerant contained in the cylinder chamber, the roller comprising a roller body provided to move along the inner surface of the cylinder in the cylinder chamber and a vane portion extending from the roller body toward the cylinder to partition the cylinder chamber, a bushing rotatably coupled to the cylinder and provided to cover at least a portion of the vane portion, and a bushing cover provided to surround the outer surface of the bushing and coupled to the cylinder and the plate, respectively.

[0012] FIG. 1 is a cross-sectional view of a compressor and an accumulator according to one embodiment.

[0013] FIG. 2 is a perspective view illustrating a partial configuration of a compressor according to one embodiment.

[0014] FIG. 3 is a perspective view illustrating a partial configuration of a compressor according to one embodiment.

[0015] Figure 4 is an exploded view showing a disassembled part of the compressor shown in Figure 2.

[0016] Figure 5 is an exploded view showing a disassembled part of the compressor shown in Figure 3.

[0017] Figure 6 is a cross-sectional view along the line A-A' shown in Figure 2.

[0018] Figure 7 is a cross-sectional view along the line B-B' shown in Figure 2.

[0019] FIG. 8 is a perspective view illustrating a partial configuration of a compressor according to one embodiment.

[0020] Figure 9 is an exploded view showing a disassembled part of the compressor shown in Figure 8.

[0021] FIG. 10 is a perspective view illustrating a bushing cover according to one embodiment.

[0022] FIG. 11 is a perspective view illustrating a partial configuration of a compressor according to one embodiment.

[0023] FIG. 12 is a perspective view illustrating the combined appearance of a roller, a bushing, and a bushing cover according to one embodiment.

[0024] FIG. 13 is a side view illustrating the combined appearance of a roller, a bushing, and a bushing cover according to one embodiment.

[0025] FIG. 14 is a cross-sectional view along the DD' line shown in FIG. 11.

[0026] Figure 15 is an enlarged view of area E shown in Figure 14.

[0027] FIG. 16 is a cross-sectional view showing the roller shown in FIG. 14 moving along the inner wall of the cylinder.

[0028] Figure 17 is an enlarged view of the G area shown in Figure 16.

[0029] Figure 18 is a drawing showing the superposition of the F region shown in Figure 15 and the H region shown in Figure 17.

[0030] FIG. 19 is a cross-sectional view showing the roller shown in FIG. 16 moving along the inner wall of the cylinder.

[0031] FIG. 20 is an enlarged view of area I shown in FIG. 19.

[0032] FIG. 21 is a cross-sectional view along the CC' line indicated in FIG. 8.

[0033] Figure 22 is an enlarged view of the J region shown in Figure 21.

[0034] FIG. 23 is a perspective view illustrating a combined mid plate, bushing, and bushing cover according to one embodiment.

[0035] FIG. 24 is a plan view illustrating the combined appearance of a mid plate, a bushing, and a bushing cover according to one embodiment.

[0036] Figure 25 is an enlarged view of the K region shown in Figure 24.

[0037] FIG. 26 is a perspective view illustrating a bushing cover according to one embodiment.

[0038] FIG. 27 is a perspective view illustrating the combined appearance of a mid plate, a bushing, and a bushing cover according to one embodiment.

[0039] FIG. 28 is a plan view illustrating the combined appearance of a mid plate, a bushing, and a bushing cover according to one embodiment.

[0040] FIG. 29 is an enlarged view of the L area shown in FIG. 28.

[0041] The various embodiments of the present disclosure and the terms used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0042] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0043] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0044] In the present disclosure, 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.

[0045] The term “and / or” includes a combination of multiple related described components or any of the multiple related described components.

[0046] 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).

[0047] Additionally, terms such as 'front,' 'rear,' 'top,' 'bottom,' 'side,' 'left,' 'right,' 'top,' and 'bottom' used in this disclosure are defined based on the drawings, and the shape and location of each component are not limited by these terms.

[0048] 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 disclosure, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0049] 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.

[0050] 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.

[0051] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0052] FIG. 1 is a cross-sectional view of a compressor and an accumulator according to one embodiment.

[0053] Referring to FIG. 1, a compressor (1) according to one embodiment of the present disclosure may include a compression unit (including components such as a cylinder (100) and a roller (200)) configured to compress a refrigerant, a driving motor (20) provided to provide power to the compression unit, and a housing (10) that accommodates the compression unit and the driving motor (20).

[0054] The housing (10) can form the exterior of the compressor (1). The housing (10) can form a receiving space (S) for accommodating components of the compressor (1). For example, the receiving space (S) can accommodate a compressor and a drive motor (20), etc.

[0055] The housing (10) may be provided to receive oil. In other words, the housing (10) may be provided to store oil. The oil can reduce friction between the various components of the compressor (1). Additionally, the oil can lubricate the various components of the compressor (1).

[0056] The housing (10) may include a refrigerant inlet (11) and a refrigerant outlet (12). The refrigerant inlet (11) may be provided to allow refrigerant to flow from outside the housing (10) into the housing (10). The refrigerant outlet (12) may be provided to allow refrigerant to be discharged from inside the housing (10) to outside the housing (10).

[0057] The refrigerant inlet section (11) may be provided in multiple numbers. For example, if the compressor (1) includes an upper cylinder (100a) and a lower cylinder (100b), the refrigerant inlet section (11) may include a first refrigerant inlet section (11a) connected to the upper cylinder (100a) and a second refrigerant inlet section (11b) connected to the lower cylinder (100b).

[0058] A compressor inlet pipe (PI) may be connected to the refrigerant inlet (11) of the housing (10). The compressor inlet pipe (PI) may be provided to guide refrigerant flowing from outside the housing (10) into the housing (10) through the refrigerant inlet (11).

[0059] The housing (10) may be connected to the accumulator (2) by a compressor inlet pipe (PI). The accumulator (2) may be configured to separate the liquid refrigerant from the refrigerant gas and supply the refrigerant gas from which the liquid refrigerant has been separated to the compressor (1). The compressor inlet pipe (PI) may be configured to guide the refrigerant supplied from the accumulator (2) into the housing (10).

[0060] The compressor inlet pipe (PI) may be provided in multiple numbers. For example, if the compressor (1) includes an upper cylinder (100a) and a lower cylinder (100b), the compressor inlet pipe (PI) may include an upper cylinder inlet pipe (PI1) connected to the upper cylinder (100a) and a lower cylinder inlet pipe (PI2) connected to the lower cylinder (100b). The upper cylinder inlet pipe (PI1) may be connected to a first refrigerant inlet section (11a), and the lower cylinder inlet pipe (PI2) may be connected to a second refrigerant inlet section (11b).

[0061] A compressor discharge pipe (PO) may be connected to the refrigerant discharge section (12) of the housing (10). The compressor discharge pipe (PO) may be provided to guide the refrigerant discharged from inside the housing (10) to outside the housing (10) through the refrigerant discharge section (12).

[0062] For example, the refrigerant inlet (11) may be provided at the bottom of the housing (10), and the compressor inlet pipe (PI) may be connected to the bottom of the housing (10). For example, the refrigerant outlet (12) may be provided at the top of the housing (10), and the compressor outlet pipe (PO) may be connected to the top of the housing (10).

[0063] The housing (10) may include a base (13), a side frame (14), and a top cover (15). The base (13) may form the lower exterior of the housing (10). The side frame (14) may form the side wall of the housing (10). The top cover (15) may form the upper exterior of the housing (10). At least a portion of the base (13), the side frame (14), and the top cover (15) may be detachably joined. At least a portion of the base (13), the side frame (14), and the top cover (15) may be formed integrally.

[0064] The drive motor (20) may be configured to generate power. Specifically, the drive motor (20) may generate rotational force. The drive motor (20) may convert electromagnetic force into mechanical rotational force. For example, the drive motor (20) may be placed on the compression section.

[0065] The drive motor (20) may include a stator (21) fixed to the housing (10) and a rotor (22) rotatable to the stator (21). The stator (21) may include a stator core and a coil wound around the stator core. The rotor (22) may include a plurality of magnets.

[0066] In the drawings, an inner rotor type drive motor (20) is illustrated in which the rotor (22) is positioned inside the stator (21), but the present disclosure is not limited thereto. The drive motor (20) may also be an outer rotor type in which the rotor (22) is positioned outside the stator (21). As long as the drive motor (20) can generate power, there is no restriction on the type of drive motor (20).

[0067] The compressor (1) may include a rotating shaft (30). The rotating shaft (30) may be provided to transmit power generated by the drive motor (20) to the compression section. The rotating shaft (30) may be provided to connect the drive motor (20) and the compression section.

[0068] The rotating shaft (30) can be connected to the rotor (22). The rotating shaft (30) can be fixed to the rotor (22) and arranged to rotate together with the rotor (22).

[0069] The rotating shaft (30) can be extended along the vertical direction (V). For example, the rotating shaft (30) can be extended along the up-down direction. For example, the rotating shaft (30) can be extended along the direction of gravity. For example, the rotating shaft (30) can be extended along the height direction of the compressor (1).

[0070] The rotating shaft (30) may be provided to penetrate the components of the compression section. For example, the rotating shaft (30) may be provided to penetrate the muffler (600), cylinder cover (500), cylinder (100), and roller (200) described later in an approximately vertical direction (V). For example, the rotating shaft (30) may be provided to penetrate the upper muffler (600a), upper cylinder cover (500a), upper cylinder (100a), upper roller (200a), mid plate (50), lower cylinder (100b), lower roller (200b), lower cylinder cover (500b), and lower muffler (600b) described later in an approximately vertical direction (V).

[0071] Additionally, the rotating shaft (30) may be provided to penetrate the central portion of the cylinder chamber (110) to be described later. In other words, the central axis of the rotating shaft (30) may be the same as the central axis of the cylinder chamber (110) to be described later. For example, the rotating shaft (30) may penetrate the central portion of the upper cylinder chamber (110a) and the central portion of the lower cylinder chamber (110b) to be described later, respectively.

[0072] The compressor (1) may include a cam (40). The cam (40) may be provided on the outer surface of the rotating shaft (30). The center axis of the cam (40) may be eccentric from the center axis of the rotating shaft (30). The cam (40) may be provided to transmit the rotational force of the rotating shaft (30) to the compression section.

[0073] The compressor (1) may include at least one cylinder (100), at least one roller (200), at least one cylinder cover (500), at least one muffler (600), and at least one cam (40), as well as a bushing (300) and a bushing cover (400) to be described later. In the drawings, an embodiment is shown in which each of the cylinder (100), roller (200), bushing (300), bushing cover (400), cylinder cover (500), muffler (600), and cam (40) is provided in two. However, the present disclosure is not limited thereto. For example, the compressor (1) may include one cylinder (100), one roller (200), one bushing (300), one bushing cover (400), one cylinder cover (500), one muffler (600), and one cam (40). Additionally, the compressor (1) may include three or more cylinders (100), three or more rollers (200), three or more bushings (300), three or more bushing covers (400), three or more cylinder covers (500), three or more mufflers (600), and three or more cams (40).

[0074] Meanwhile, the expressions "upper ~" and "lower ~" may be used to distinguish between multiple components included in the compressor (1). In the components where the expression "upper ~" is used, the reference numeral 'a' may be added, and in the components where the expression "lower ~" is used, the reference numeral 'b' may be added. For example, if the compressor (1) includes two cylinders (100), the cylinder positioned relatively higher among the two cylinders may be referred to as the upper cylinder (100a), and the cylinder positioned relatively lower among the two cylinders may be referred to as the lower cylinder (100b). If there is no need to distinguish between multiple components included in the compressor (1), the expressions "upper ~" and "lower ~" may not be used. As an example, the description of the cylinder (100) may be a description common to both the upper cylinder (100a) and the lower cylinder (100b). In addition, the above description may be applied not only to the cylinder (100), but also to the roller (200), bushing (300), bushing cover (400), cylinder cover (500), muffler (600), and cam (40).

[0075] In other words, the description for the cylinder (100) can be applied to the upper cylinder (100a) and the lower cylinder (100b), respectively. The description for the roller (200) can be applied to the upper roller (200a) and the lower roller (200b), respectively. The description for the bushing (300) can be applied to the upper bushing (300a) and the lower bushing (300b), respectively. The description for the bushing cover (400) can be applied to the upper bushing cover (400a) and the lower bushing cover (500b), respectively. The description for the cylinder cover (500) can be applied to the upper cylinder cover (500a) and the lower cylinder cover (500b), respectively. The description for the muffler (600) can be applied to the upper muffler (600a) and the lower muffler (600b), respectively. The description of the cam (40) can be applied to the upper cam (40a) and the lower cam (40b), respectively.

[0076] FIG. 2 is a perspective view illustrating a partial configuration of a compressor according to one embodiment. FIG. 3 is a perspective view illustrating a partial configuration of a compressor according to one embodiment. FIG. 4 is an exploded view illustrating a partial configuration of the compressor shown in FIG. 2. FIG. 5 is an exploded view illustrating a partial configuration of the compressor shown in FIG. 3. FIG. 6 is a cross-sectional view along the line A-A' indicated in FIG. 2. FIG. 7 is a cross-sectional view along the line B-B' indicated in FIG. 2.

[0077] Hereinafter, some components of the compressor (1) will be described with reference to FIGS. 1 to 7. Specifically, an embodiment will be described in which each of the cylinder (100), roller (200), bushing (300), bushing cover (400), cylinder cover (500), muffler (600), and cam (40) is two. However, as described above, the present disclosure is not limited to such embodiments.

[0078] The compressor (1) may include at least one cylinder (100).

[0079] The cylinder (100) may include a cylinder chamber (110). The cylinder chamber (110) may be provided inside the cylinder (100). For example, the cylinder (100) may have a ring shape, and the cylinder chamber (110) may be formed in the inner part of the ring shape of the cylinder (100).

[0080] The cylinder chamber (110) may be provided to receive a refrigerant. Specifically, the cylinder chamber (110) may be provided to receive a refrigerant supplied from an accumulator (2). The refrigerant received in the cylinder chamber (110) may be compressed. Specifically, the cylinder chamber (110) may include an inlet chamber (111) into which the refrigerant is introduced and a compression chamber (112) into which the introduced refrigerant is compressed.

[0081] The cylinder (100) may include an inlet hole (120) into which refrigerant is introduced. The inlet hole (120) may be connected to a refrigerant inlet section (11) and a compressor inlet pipe (PI). That is, the refrigerant supplied to the compressor inlet pipe (PI) may sequentially pass through the refrigerant inlet section (11) and the inlet hole (120) to flow into the cylinder chamber (110).

[0082] The inlet hole (120) can be in communication with the cylinder chamber (110). Specifically, the inlet hole (120) can be in communication with the inlet chamber (111) of the cylinder chamber (110).

[0083] For example, the compressor (1) may include an upper cylinder (100a) and a lower cylinder (100b). The upper cylinder (100a) may be positioned above the lower cylinder (100b). In other words, the lower cylinder (100b) may be positioned below the upper cylinder (100a).

[0084] The upper cylinder (100a) may include an upper cylinder chamber (110a). The upper cylinder chamber (110a) may include an upper inlet chamber (111a) into which refrigerant is introduced and an upper compression chamber (112a) into which the introduced refrigerant is compressed. For example, the upper cylinder chamber (110a) may be a space enclosed by the inner surface of the upper cylinder (100a), the upper cylinder cover (500a), and the mid plate (50).

[0085] The upper cylinder (100a) may include an upper inlet hole (120a) into which refrigerant is introduced. The upper inlet hole (120a) may be connected to a first refrigerant inlet section (11a) and an upper cylinder inlet pipe (PI1). The upper inlet hole (120a) may be in communication with an upper cylinder chamber (110a). Specifically, the upper inlet hole (120a) may be in communication with an upper inlet chamber (111a).

[0086] The lower cylinder (100b) may include a lower cylinder chamber (110b). The lower cylinder chamber (110b) may include a lower inlet chamber (111b) into which refrigerant is introduced and a lower compression chamber (112b) into which the introduced refrigerant is compressed. For example, the lower cylinder chamber (110b) may be a space enclosed by the inner surface of the lower cylinder (100b), the lower cylinder cover (500b), and the mid plate (50).

[0087] The lower cylinder (100b) may include a lower inlet hole (120b) into which refrigerant is introduced. The lower inlet hole (120b) may be connected to a second refrigerant inlet section (11b) and a lower cylinder inlet pipe (PI2). The lower inlet hole (120b) may be in communication with the lower cylinder chamber (110b). Specifically, the lower inlet hole (120b) may be in communication with the lower inlet chamber (111b).

[0088] The compressor (1) may include a mid plate (50). The mid plate (50) may be provided on one side of the cylinder (100). For example, the mid plate (50) may be provided between the upper cylinder (100a) and the lower cylinder (100b). The mid plate (50) may form a cylinder chamber (110) together with the cylinder (100) and the cylinder cover (500).

[0089] The mid plate (50) may be positioned below the upper cylinder (100a) to cover the lower side of the upper cylinder chamber (110a). The mid plate (50) may be positioned above the lower cylinder (100b) to cover the upper side of the lower cylinder chamber (110b). The mid plate (50) may be provided to partition the upper cylinder chamber (110a) and the lower cylinder chamber (110b).

[0090] The mid plate (50) may be coupled to the upper cylinder (100a) and / or the lower cylinder (100b). For example, the mid plate (50) may be screw-coupled to the upper cylinder (100a) and / or the lower cylinder (100b). However, the present disclosure is not limited to the examples described above, and the mid plate (50) may be coupled to the upper cylinder (100a) and / or the lower cylinder (100b) through various known coupling methods.

[0091] The compressor (1) may include at least one roller (200). The number of rollers (200) may correspond to the number of cylinders (100).

[0092] At least a portion of the roller (200) may be provided in the cylinder chamber (110). The roller (200) may be provided to compress the refrigerant contained in the cylinder chamber (110).

[0093] The roller (200) may include a roller body (210). The roller body (210) may be provided inside a cylinder chamber (110).

[0094] The roller body (210) can be coupled with a cam (40). Specifically, a space for accommodating the cam (40) may be provided on the inner side of the roller body (210). For example, the roller body (210) may have a roughly ring shape. Through this configuration, the roller body (210) can receive rotational force from the rotation shaft (30).

[0095] As described above, the center axis of the cam (40) may be eccentric from the center axis of the rotating shaft (30). Additionally, since the center axis of the rotating shaft (30) may be the same as the center axis of the cylinder chamber (110), the center axis of the cam (40) may be eccentric from the center axis of the cylinder chamber (110). Due to this configuration, as the rotating shaft (30) rotates, the roller body (210) can move along the inner surface of the cylinder (100). Specifically, the outer surface of the roller body (210) can move along the inner surface of the cylinder (100) while in contact with the inner surface of the cylinder (100).

[0096] The roller body (210) may be configured to compress the refrigerant contained in the cylinder chamber (110). Specifically, the roller body (210) may compress the refrigerant contained in the cylinder chamber (110) as it moves along the inner surface of the cylinder (100).

[0097] The roller (200) may include a vane portion (220). The roller body (210) and the vane portion (220) may be formed integrally.

[0098] The vane portion (220) may extend from the roller body (210) toward the cylinder (100). With this configuration, the vane portion (220) may partition the cylinder chamber (110). Specifically, the vane portion (220) may partition the cylinder chamber (110) into an inlet chamber (111) into which the refrigerant is introduced and a compression chamber (112) into which the refrigerant is compressed.

[0099] For example, the compressor (1) may include an upper roller (200a) and a lower roller (200b). The upper roller (200a) may be placed on the mid plate (50). The lower roller (200b) may be placed below the mid plate (50).

[0100] At least a portion of the upper roller (200a) may be provided in the upper cylinder chamber (110a). The upper roller (200a) may be provided to compress the refrigerant contained in the upper cylinder chamber (110a).

[0101] The upper roller (200a) may include an upper roller body (210a). The upper roller body (210a) may be provided inside the upper cylinder chamber (110a).

[0102] The upper roller body (210a) can be combined with the upper cam (40a). Through this configuration, the upper roller body (210a) can receive rotational force from the rotating shaft (30). As the rotating shaft (30) rotates, the upper roller body (210a) can move along the inner surface of the upper cylinder (100a).

[0103] The upper roller (200a) may include an upper vane portion (220a). The upper roller body (210a) and the upper vane portion (220a) may be formed integrally.

[0104] The upper vane portion (220a) may extend from the upper roller body (210a) toward the upper cylinder (100a). With this configuration, the upper vane portion (220a) may partition the upper cylinder chamber (110a). Specifically, the upper vane portion (220a) may partition the upper cylinder chamber (110a) into an upper inlet chamber (111a) into which the refrigerant is introduced and an upper compression chamber (112a) into which the refrigerant is compressed.

[0105] At least a portion of the lower roller (200b) may be provided in the lower cylinder chamber (110b). The lower roller (200b) may be provided to compress the refrigerant contained in the lower cylinder chamber (110b).

[0106] The lower roller (200b) may include a lower roller body (210b). The lower roller body (210b) may be provided inside the lower cylinder chamber (110b).

[0107] The lower roller body (210b) can be coupled with the lower cam (40b). Through this configuration, the lower roller body (210b) can receive rotational force from the rotating shaft (30). As the rotating shaft (30) rotates, the lower roller body (210b) can move along the inner surface of the lower cylinder (100b).

[0108] The lower roller (200b) may include a lower vane portion (220b). The lower roller body (210b) and the lower vane portion (220b) may be formed integrally.

[0109] The lower vane portion (220b) may extend from the lower roller body (210b) toward the lower cylinder (100b). With this configuration, the lower vane portion (220b) may partition the lower cylinder chamber (110b). Specifically, the lower vane portion (220b) may partition the lower cylinder chamber (110b) into a lower inlet chamber (111b) into which refrigerant is introduced and a lower compression chamber (112b) into which refrigerant is compressed.

[0110] The compressor (1) may include at least one bushing (300). The number of bushings (300) may correspond to the number of rollers (200).

[0111] The bushing (300) can be rotatably coupled to the cylinder (100). The bushing (300) can be provided to cover at least a portion of the vane portion (220).

[0112] The bushing (300) can guide the movement and / or rotation of the vane portion (220). The bushing (300) can reduce friction loss that may occur between the vane portion (220) and surrounding components. Further details regarding this will be described later.

[0113] For example, the compressor (1) may include an upper bushing (300a) and a lower bushing (300b). The upper bushing (300a) may be placed on the mid plate (50). The lower bushing (300b) may be placed below the mid plate (50).

[0114] The upper bushing (300a) can be rotatably coupled to the upper cylinder (100a). The upper bushing (300a) can be provided to cover at least a portion of the upper vane (220a).

[0115] The lower bushing (300b) can be rotatably coupled to the lower cylinder (100b). The lower bushing (300b) can be provided to cover at least a portion of the lower vane portion (220b).

[0116] The compressor (1) may include at least one bushing cover (400). The number of bushing covers (400) may correspond to the number of bushings (300).

[0117] The bushing cover (400) can cover the bushing (300). The bushing cover (400) can be provided to wrap around the outer surface of the bushing (300). The bushing cover (400) can be placed between the cylinder (100) and the bushing (300).

[0118] For example, the compressor (1) may include an upper bushing cover (400a) and a lower bushing cover (400b). The upper bushing cover (400a) may be placed over the mid plate (50). The lower bushing cover (400b) may be placed under the mid plate (50).

[0119] The upper bushing cover (400a) can cover the upper bushing (300a). The upper bushing cover (400a) can be provided to wrap around the outer surface of the upper bushing (300a). The upper bushing cover (400a) can be positioned between the upper cylinder (100a) and the upper bushing (300a).

[0120] The lower bushing cover (400b) can cover the lower bushing (300b). The lower bushing cover (400b) can be provided to wrap around the outer surface of the lower bushing (300b). The lower bushing cover (400b) can be placed between the lower cylinder (100b) and the lower bushing (300b).

[0121] The compressor (1) may include a rotating shaft (30). The rotating shaft (30) may extend along the vertical direction (V). The rotating shaft (30) may be provided to penetrate the components of the compression section.

[0122] The rotating shaft (30) may include a shaft body (31). A hollow space in which an oil passage (32) is formed may be provided inside the shaft body (31). The oil passage (32) may extend along the longitudinal direction of the shaft body (31). In other words, the oil passage (32) may extend along the approximately vertical direction (V).

[0123] The rotating shaft (30) may include an oil suction hole (33). The oil suction hole (33) may be provided to suck oil contained in the housing (10).

[0124] The oil suction hole (33) may be provided at the lower end of the shaft body (31). In other words, the oil suction hole (33) may be provided at one end of the oil passage (32). The oil suction hole (33) may be open toward the bottom of the housing (10).

[0125] For example, the rotating shaft (30) may include a paddle (35) provided inside the shaft body (31) and a pickup member (36) provided in the oil suction hole (33) to suck oil contained in the housing (10). However, the present disclosure is not limited to the above-described example, and the rotating shaft (30) may suck oil through various known methods.

[0126] The rotating shaft (30) may include an oil discharge hole (34). The oil discharge hole (34) may be provided to discharge oil flowing along the oil passage (32).

[0127] The oil discharge hole (34) can connect the oil passage (32) and the outer surface of the shaft body (31). The oil discharged through the oil discharge hole (34) can flow between the various components of the compression section.

[0128] The oil discharge holes (34) may be provided in multiple numbers. The multiple oil discharge holes (34) may be spaced apart along the longitudinal direction of the oil passage (32). For example, the multiple oil discharge holes (34) may be spaced apart along the approximately vertical direction (V). However, the present disclosure is not limited thereto. According to an embodiment, the rotating shaft (30) may include only one oil discharge hole (34).

[0129] The compressor (1) may include at least one cam (40). The number of cams (40) may correspond to the number of cylinders (100). The number of cams (40) may correspond to the number of rollers (200).

[0130] The cam (40) may be provided on the outer surface of the rotating shaft (30). The center axis of the cam (40) may be eccentric from the center axis of the rotating shaft (30).

[0131] The cam (40) can be coupled with the roller body (210). For example, most of the outer surface of the cam (40) can come into contact with most of the inner surface of the roller body (210). As the rotating shaft (30) and the cam (40) rotate, the roller body (210) can move along the inner surface of the cylinder (100).

[0132] Although the cam (40) has been described above as being a separate component from the rotating shaft (30), the cam (40) may be provided as a component of the rotating shaft (30). That is, the rotating shaft (30) may include the cam (40).

[0133] For example, the compressor (1) may include an upper cam (40a) and a lower cam (40b). The upper cam (40a) may be positioned above the mid plate (50). The lower cam (40b) may be positioned below the mid plate (50).

[0134] The upper cam (40a) may be provided on the outer surface of the rotating shaft (30). The center axis of the upper cam (40a) may be eccentric from the center axis of the rotating shaft (30).

[0135] The upper cam (40a) can be coupled with the upper roller body (210a). For example, most of the outer surface of the upper cam (40a) can come into contact with most of the inner surface of the upper roller body (210a). As the rotating shaft (30) and the upper cam (40a) rotate, the upper roller body (210a) can move along the inner surface of the upper cylinder (100a).

[0136] The lower cam (40b) may be provided on the outer surface of the rotating shaft (30). The center axis of the lower cam (40b) may be eccentric from the center axis of the rotating shaft (30).

[0137] The lower cam (40b) can be coupled with the lower roller body (210b). For example, most of the outer surface of the lower cam (40b) can come into contact with most of the inner surface of the lower roller body (210b). As the rotating shaft (30) and the lower cam (40b) rotate, the lower roller body (210b) can move along the inner surface of the lower cylinder (100b).

[0138] The upper cam (40a) and the lower cam (40b) can be eccentrically positioned in opposite directions with respect to the central axis of the rotating shaft (30). Accordingly, the phase when the refrigerant in the upper cylinder chamber (110a) is compressed by the upper roller (200a) and the phase when the refrigerant in the lower cylinder chamber (110b) is compressed by the lower roller (200b) can be opposite to each other.

[0139] The compressor (1) may include at least one cylinder cover (500). The number of cylinder covers (500) may correspond to the number of cylinders (100).

[0140] A cylinder cover (500) may be provided on one side of the cylinder (100). The cylinder cover (500) may be provided to cover at least a portion of the cylinder chamber (110). The cylinder cover (500) may form the cylinder chamber (110) together with the cylinder (100) and the mid plate (50).

[0141] The cylinder cover (500) may include a cover body (510). The cover body (510) may be coupled to the cylinder (100).

[0142] The cover body (510) may include a connection hole (511). The connection hole (511) may connect the interior of the cylinder chamber (110) and the muffler (600) to be described later. The refrigerant compressed in the cylinder chamber (110) may flow to the muffler (600) through the connection hole (511).

[0143] The cylinder cover (500) may include a support member (520). The support member (520) may be provided to support the rotating shaft (30). The support member (520) may extend from the cover body (510). For example, the support member (520) may be provided to surround a portion of the outer surface of the rotating shaft (30). For example, the support member (520) may function as a bearing that rotatably supports the rotating shaft (30).

[0144] For example, the compressor (1) may include an upper cylinder cover (500a) and a lower cylinder cover (500b). The upper cylinder cover (500a) may be placed over the upper cylinder (100a) and the upper roller (200a). The lower cylinder cover (500b) may be placed under the lower cylinder (100b) and the lower roller (200b).

[0145] An upper cylinder cover (500a) may be provided on the upper side of the upper cylinder (100a). The upper cylinder cover (500a) may be provided to cover the upper side of the upper cylinder chamber (110a). The upper cylinder cover (500a) may form the upper cylinder chamber (110a) together with the upper cylinder (100a) and the mid plate (50).

[0146] The upper cylinder cover (500a) may include an upper cover body (510a). The upper cover body (510a) may be coupled to the upper cylinder (100a).

[0147] The upper cover body (510a) may include an upper connection hole (511a). The upper connection hole (511a) may connect the upper cylinder chamber (110a) and the interior of the upper muffler (600a) to be described later. The refrigerant compressed in the upper cylinder chamber (110a) may flow to the upper muffler (600a) through the upper connection hole (511a).

[0148] The upper cylinder cover (500a) may include an upper support member (520a). The upper support member (520a) may be provided to support a rotating shaft (30). The upper support member (520a) may extend upward from the upper cover body (510a).

[0149] A lower cylinder cover (500b) may be provided on the lower side of the lower cylinder (100b). The lower cylinder cover (500b) may be provided to cover the lower side of the lower cylinder chamber (110b). The lower cylinder cover (500b) may form the lower cylinder chamber (110b) together with the lower cylinder (100b) and the mid plate (50).

[0150] The lower cylinder cover (500b) may include a lower cover body (510b). The lower cover body (510b) may be coupled to the lower cylinder (100b).

[0151] The lower cover body (510b) may include a lower connection hole (511b). The lower connection hole (511b) may connect the lower cylinder chamber (110b) and the interior of the lower muffler (600b) to be described later. The refrigerant compressed in the lower cylinder chamber (110b) may flow to the lower muffler (600b) through the lower connection hole (511b).

[0152] The lower cylinder cover (500b) may include a lower support member (520b). The lower support member (520b) may be provided to support a rotating shaft (30). The lower support member (520b) may extend downward from the lower cover body (510b).

[0153] The compressor (1) may include at least one valve (700). For example, the number of valves (700) may correspond to the number of cylinders (100).

[0154] The valve (700) may be provided to open and close the connection hole (511) of the cylinder cover (500). The valve (700) may be provided to allow or block the flow of refrigerant. Specifically, the valve (700) may allow the flow of refrigerant based on the pressure of the refrigerant being above a certain level, and block the flow of refrigerant based on the pressure of the refrigerant being below a certain level.

[0155] For example, the compressor (1) may include an upper valve (700a) and a lower valve (700b). The upper valve (700a) may be positioned above the upper cylinder cover (500a). The lower valve (700b) may be positioned below the lower cylinder cover (500b).

[0156] An upper valve (700a) may be provided to open and close an upper connection hole (511a) of an upper cylinder cover (500a). The upper valve (700a) may open the upper connection hole (511a) based on the pressure of the refrigerant in the upper cylinder chamber (110a) being above a certain level. The upper valve (700a) may close the upper connection hole (511a) based on the pressure of the refrigerant in the upper cylinder chamber (110a) being below a certain level.

[0157] A lower valve (700b) may be provided to open and close a lower connection hole (511b) of a lower cylinder cover (500b). The lower valve (700b) may open the lower connection hole (511b) based on the pressure of the refrigerant in the lower cylinder chamber (110b) being above a certain level. The lower valve (700b) may close the lower connection hole (511b) based on the pressure of the refrigerant in the lower cylinder chamber (110b) being below a certain level.

[0158] The compressor (1) may include at least one muffler (600). The number of mufflers (600) may correspond to the number of cylinders (100). The number of mufflers (600) may correspond to the number of cylinder covers (500).

[0159] The muffler (600) can cover at least a portion of the cylinder cover (500). The muffler (600) can be coupled to the cylinder cover (500) and / or the cylinder (100).

[0160] The muffler (600) may be provided to reduce noise generated when the refrigerant compressed in the cylinder chamber (110) passes through the cylinder (100). The muffler (600) may be provided to receive the refrigerant flowing out from the cylinder cover (500).

[0161] For example, the compressor (1) may include an upper muffler (600a) and a lower muffler (600b). The upper muffler (600a) may be placed over the upper cylinder cover (500a). The lower muffler (600b) may be placed under the lower cylinder cover (500b).

[0162] The upper muffler (600a) can cover the upper cylinder cover (500a). The upper muffler (600a) can be coupled to the upper cylinder cover (500a) and / or the upper cylinder (100a).

[0163] The upper muffler (600a) can reduce noise generated when the refrigerant compressed in the upper cylinder chamber (110a) passes through the upper cylinder (100a). The upper muffler (600a) can be provided to receive the refrigerant flowing out from the upper cylinder cover (500a).

[0164] The upper muffler (600a) may include a discharge hole (610) for discharging refrigerant. Refrigerant within the upper muffler (600a) may be discharged to the outside of the compression section through the discharge hole (610). Additionally, refrigerant within the lower muffler (600b) may also flow into the upper muffler (600a) and then be discharged to the outside of the compression section through the discharge hole (610). Further details regarding this will be described later.

[0165] The lower muffler (600b) can cover the lower cylinder cover (500b). The lower muffler (600b) can be coupled to the lower cylinder cover (500b) and / or the lower cylinder (100b).

[0166] The lower muffler (600b) can reduce noise generated when the refrigerant compressed in the lower cylinder chamber (110b) passes through the lower cylinder (100b). The lower muffler (600b) can be provided to receive the refrigerant leaking from the lower cylinder cover (500b).

[0167] Hereinafter, an example of refrigerant flow is described with reference to FIGS. 6 and FIGS. 7. In FIGS. 6 and FIGS. 7, the refrigerant flow is indicated by a dashed arrow.

[0168] Refrigerant can be supplied from an accumulator (2, see FIG. 1) to a compression section. The refrigerant supplied to the compression section can be introduced into an upper cylinder chamber (110a) through a first refrigerant inlet (11a, see FIG. 1) and an upper inlet hole (120a, see FIG. 2). An upper roller (200a) can compress the refrigerant inside the upper cylinder chamber (110a). When the pressure of the compressed refrigerant is above a certain level, an upper valve (700a) can open an upper connection hole (511a). The compressed refrigerant can be introduced into an upper muffler (600a) through the opened upper connection hole (511a).

[0169] The refrigerant introduced into the upper muffler (600a) can be discharged from the compression section through the discharge hole (610, see FIG. 2) of the upper muffler (600a).

[0170] Refrigerant can be supplied from an accumulator (2, see FIG. 1) to a compression section. The refrigerant supplied to the compression section can be introduced into a lower cylinder chamber (110b) through a second refrigerant inlet (11b, see FIG. 1) and a lower inlet hole (120b, see FIG. 2). A lower roller (200b) can compress the refrigerant inside the lower cylinder chamber (110b). When the pressure of the compressed refrigerant is above a certain level, a lower valve (700b) can open a lower connection hole (511b). The compressed refrigerant can be introduced into a lower muffler (600b) through the opened lower connection hole (511b).

[0171] The refrigerant in the lower muffler (600b) can flow into the upper muffler (600a) along the connecting passage (90). The connecting passage (90) can be formed by overlapping the hole (502) formed in the lower cylinder cover (500b), the hole (102) formed in the lower cylinder (100b), the hole (51) formed in the mid plate (50), the hole (101) formed in the upper cylinder (100a), and the hole (501) formed in the upper cylinder cover (500a) (see FIG. 4). The refrigerant introduced into the upper muffler (600a) through the connecting passage (90) can be discharged through the discharge hole (610, see FIG. 2) of the upper muffler (600a).

[0172] Below, we will examine the bushing (300), bushing cover (400), and surrounding components in more detail. As previously mentioned, the description of the bushing (300) can be applied to the upper bushing (300a) and the lower bushing (300b) respectively, and the description of the bushing cover (400) can be applied to the upper bushing cover (400a) and the lower bushing cover (500b) respectively.

[0173] FIG. 8 is a perspective view illustrating a partial configuration of a compressor according to one embodiment. FIG. 9 is an exploded view illustrating a partial configuration of the compressor illustrated in FIG. 8. FIG. 10 is a perspective view illustrating a bushing cover according to one embodiment. FIG. 11 is a perspective view illustrating a partial configuration of a compressor according to one embodiment.

[0174] Referring to FIGS. 8 through 11, the compressor (1) may include a rotating shaft (30) and a cam (40). The rotating shaft (30) may extend along the vertical direction (V), and the cam (40) may be provided on the outer surface of the rotating shaft (30). Power generated by the drive motor (20, see FIG. 1) may be transmitted to the compression section through the rotating shaft (30) and the cam (40).

[0175] The compressor (1) may include a cylinder (100) and a mid plate (50). A cylinder chamber (110) in which a refrigerant is received may be provided inside the cylinder (100). The mid plate (50) may form the cylinder chamber (110) together with the cylinder (100). The cylinder (100) and the mid plate (50) may be combined with each other.

[0176] The rotating shaft (30) can pass through the cylinder (100) and the mid plate (50). At least a portion of the rotating shaft (30) and the cam (40) can be provided within the cylinder chamber (110).

[0177] The cylinder (100) may include a cylinder groove (130). The cylinder groove (130) may be formed by being recessed into the inner surface of the cylinder (100). The cylinder groove (130) may be provided to accommodate at least a portion of the vane portion (220), a bushing (300), and a bushing cover (400).

[0178] Specifically, the cylinder groove (130) may form a bushing receiving space (131) for receiving a bushing (300) and a bushing cover (400), and a vane receiving space (132) for receiving at least a portion of a vane (220). The bushing receiving space (131) may be provided inside the vane receiving space (132). Each of the bushing receiving space (131) and the vane receiving space (132) may be formed in a roughly cylindrical shape.

[0179] The mid plate (50) may include a cover insertion groove (52). It may be arranged so that at least a portion of the bushing cover (400) is inserted into the cover insertion groove (52). More details regarding this will be described later.

[0180] The compressor (1) may include a roller (200). The roller (200) may include a roller body (210) and a vane portion (220).

[0181] The roller body (210) can be coupled with the cam (40) inside the cylinder chamber (110). Through this configuration, the roller body (210) can receive rotational force from the rotating shaft (30). Additionally, since the center axis of the cam (40) can be eccentric from the center axis of the cylinder chamber (110), the roller body (210) can move along the inner surface of the cylinder (100) as the rotating shaft (30) rotates. Specifically, the outer surface of the roller body (210) can move along the inner surface of the cylinder (100) while in contact with the inner surface of the cylinder (100).

[0182] The vane portion (220) may extend from the roller body (210) toward the cylinder (100). With this configuration, the vane portion (220) may partition the cylinder chamber (110). Specifically, the vane portion (220) may partition the cylinder chamber (110) into an inlet chamber (111) into which the refrigerant is introduced and a compression chamber (112) into which the refrigerant is compressed.

[0183] As the roller body (210) moves along the inner surface of the cylinder (100), the vane portion (220) may move and / or rotate relative to the cylinder (100). For example, the vane portion (220) may move along the radial direction of the roller body (210). For example, the vane portion (220) may rotate along the circumferential direction of the roller body (210) relative to the cylinder (100). For example, the vane portion (220) may move relative to the cylinder (100) and rotate relative to the cylinder (100) at the same time.

[0184] The vane portion (220) may include a first vane body (221) and a second vane body (222). The first vane body (221) may protrude radially from the roller body (210). The second vane body (222) may protrude radially from the first vane body (221) to the roller body (210). Specifically, the second vane body (222) may protrude radially from one end of the first vane body (221) along the radial direction of the roller body (210) to the roller body (210).

[0185] The length of the first vane body (221) extending in the vertical direction (V) may be longer than the length of the second vane body (222) extending in the vertical direction (V). That is, the first vane body (221) and the second vane body (222) may be arranged with a step difference from each other.

[0186] The compressor (1) may include a bushing (300). The bushing (300) may be coupled to the cylinder (100). Specifically, the bushing (300) may be received in the bushing receiving space (131) of the cylinder (100). The bushing (300) may be coupled to the vane portion (220).

[0187] The bushing (300) can guide the movement of the vane portion (220). In other words, the bushing (300) can support the vane portion (220) so that it can move. Specifically, the bushing (300) can support the vane portion (220) so that it can move along the radial direction of the roller body (210).

[0188] The bushing (300) can be rotatably coupled to the cylinder (100). That is, the bushing (300) can be rotatably provided with respect to the cylinder (100). Specifically, the bushing (300) can be provided to rotate about a rotation axis (A2) provided parallel to the center axis (A1) of the roller body (210) (see FIG. 11). For example, the bushing (300) can be provided to rotate about a rotation axis (A2) extending in the vertical direction (V).

[0189] The bushing (300) can guide the rotation of the vane portion (220). The bushing (300) can rotate together with the vane portion (220) relative to the cylinder (100). Additionally, since the vane portion (220) is arranged to rotate as the roller body (210) moves along the inner wall of the cylinder (100), the bushing (300) can also be arranged to rotate as the roller body (210) moves along the inner wall of the cylinder (100).

[0190] According to the concept of the present disclosure, the bushing (300) can guide the movement and / or rotation of the vane portion (220). Through this configuration, the bushing (300) can facilitate the movement and / or rotation of the roller (200). Accordingly, the bushing (300) can reduce friction loss that may occur between the vane portion (220) and surrounding components (cylinder (100), mid plate (50), cylinder cover (500), etc.).

[0191] The bushing (300) may be provided to cover at least a portion of the vane portion (220). Specifically, the bushing (300) may include a first cover portion (310) provided to cover one side (228) of the vane portion (220), a second cover portion (320) provided to cover the other side (229) provided opposite to the one side (228) of the vane portion (220), and a connecting portion (330) connecting the first cover portion (310) and the second cover portion (320). That is, the first cover portion (310) provided to cover one side (228) of the vane portion (220) and the second cover portion (320) provided to cover the other side of the vane portion (220) may be formed integrally by the connecting portion (330).

[0192] The bushing (300) may be provided so that at least a portion of the vane portion (220) is inserted. Specifically, the bushing (300) may include a bushing groove (340) provided so that at least a portion of the vane portion (220) is inserted. The bushing groove (340) may be formed by a first cover portion (310), a second cover portion (320), and a connecting portion (330).

[0193] For example, the bushing (300) may be provided to cover the first vane body (221) of the vane portion (220). That is, the bushing groove (340) may be provided so that the first vane body (221) is inserted therein. The bushing groove (340) may be formed in a shape corresponding to the first vane body (221). As the roller body (210) moves along the inner surface of the cylinder (100), the entire portion of the first vane body (221) may be inserted into the bushing groove (340), or only a portion of the first vane body (221) may be inserted into the bushing groove (340).

[0194] The bushing (300) may be provided so that the vane portion (220) passes through it. Specifically, the bushing (300) may include a bushing opening (350) provided so that one end of the vane portion (220) passes through it.

[0195] The bushing opening (350) can be connected to the bushing groove (340). Specifically, the bushing opening (350) can be formed by opening in the connecting portion (330). Through this configuration, at least a portion of the vane portion (220) can pass through the bushing groove (340) and the bushing opening (350) sequentially to penetrate the bushing (300).

[0196] The bushing opening (350) may be provided on the opposite side of the entrance of the bushing groove (340). Specifically, the entrance of the bushing groove (340) may face the cylinder chamber (110), and the bushing opening (350) may face the vane receiving space (132).

[0197] For example, the bushing opening (350) may be provided so that the second vane body (222) passes through it. As the roller body (210) moves along the inner surface of the cylinder (100), the second vane body (222) may move while maintaining a state of passing through the bushing opening (350). Accordingly, at least a portion of the second vane body (222) may be provided on the outside of the bushing (300). In other words, at least a portion of the second vane body (222) may be provided in the vane receiving space (132).

[0198] The compressor (1) may include a bushing cover (400). The bushing cover (400) may cover a bushing (300). The bushing cover (400) may be a floating bushing (400) and may be referred to as a floating bushing (400).

[0199] The bushing cover (400) can be coupled to the cylinder (100). Specifically, the bushing cover (400) can be received in the bushing receiving space (131) of the cylinder (100). The bushing cover (400) can be provided on the outside of the bushing (300). In other words, the bushing (300) can be provided on the inside of the bushing cover (400).

[0200] The bushing cover (400) can be coupled to the mid plate (50). Specifically, at least a portion of the bushing cover (400) can be inserted into the cover insertion groove (52) of the mid plate (50). Further details regarding this will be described later.

[0201] The bushing cover (400) may be provided to cover the outer surface of the bushing (300). Specifically, the bushing cover (400) may be provided to cover the outer surface of each of the first cover portion (310), the second cover portion (320), and the connecting portion (330) of the bushing (300).

[0202] A bushing cover (400) may be positioned between the cylinder (100) and the bushing (300). Specifically, the bushing cover (400) may extend along the circumferential direction of the bushing (300) between the cylinder (100) and the bushing (300). Through this configuration, the outer surface of the bushing (300) may come into contact with the inner surface of the bushing cover (400), and the outer surface of the bushing cover (400) may come into contact with the cylinder (100).

[0203] The bushing cover (400) may include an opening (410). The opening (410) may be formed between one end (401) of the bushing cover (400) along the circumferential direction of the bushing (300) and the other end (402) of the bushing cover (400) provided on the opposite side of the one end (401) of the bushing cover (400). The opening (410) may be provided so that the vane portion (220) passes through it.

[0204] The opening (410) may be provided at a position corresponding to the entrance of the bushing groove (340). Accordingly, at least a portion of the vane (220) may penetrate the opening (410) and be inserted into the bushing groove (340).

[0205] The bushing cover (400) may be provided so that the vane portion (220) passes through it. Specifically, the bushing cover (400) may include a cover opening (420) provided so that one end of the vane portion (220) passes through it.

[0206] The cover opening (420) may be formed at a position corresponding to the bushing opening (350). Through this configuration, at least a portion of the vane (220) may pass through the opening (410), the bushing groove (340), the bushing opening (350), and the cover opening (420) in sequence to penetrate the bushing (300).

[0207] The cover opening (420) may be provided on the opposite side of the opening (410). Specifically, the opening (410) may face the cylinder chamber (110), and the cover opening (420) may face the vane receiving space (132).

[0208] For example, the cover opening (420) may be provided so that the second vane body (222) passes through it. When the roller body (210) moves along the inner surface of the cylinder (100), the second vane body (222) may move while maintaining the state of passing through the cover opening (420). Accordingly, at least a portion of the second vane body (222) may be provided on the outside of the bushing cover (400). In other words, at least a portion of the second vane body (222) may be provided in the vane receiving space (132).

[0209] The bushing cover (400) can be rotatably coupled to the cylinder (100) and the mid plate (50). The bushing cover (400) can be rotatably provided between the cylinder (100) and the bushing (300).

[0210] The bushing cover (400) may be provided to be rotatable along the rotational direction of the bushing (300). That is, the bushing cover (400) may be provided to rotate about the same rotational axis (A2) as the bushing (300) (see FIG. 11). Specifically, the bushing cover (400) may be provided to rotate about a rotational axis (A2) that is provided parallel to the center axis (A1) of the roller body (210). For example, the bushing cover (400) may be provided to rotate about a rotational axis (A2) that extends in the vertical direction (V).

[0211] The bushing cover (400) may be arranged to rotate as the bushing (300) rotates. Specifically, since the bushing cover (400) and the bushing (300) are arranged to come into surface contact with each other, the bushing (300) can rotate to induce rotation of the bushing cover (400). Additionally, since the bushing (300) is arranged to rotate as the roller body (210) moves along the inner wall of the cylinder (100), the bushing cover (400) may be arranged to rotate as the roller body (210) moves along the inner wall of the cylinder (100).

[0212] The angular velocity of the bushing cover (400) may be slower than the angular velocity of the bushing (300). Specifically, the angular velocity at which the bushing cover (400) rotates as the roller body (210) moves along the inner wall of the cylinder (100) may be slower than the angular velocity at which the bushing (300) rotates as the roller body (210) moves along the inner wall of the cylinder (100).

[0213] Generally, the friction loss generated as the bushing (300) rotates may be proportional to the angular velocity of the bushing (300) and the diameter of the bushing (300). In this case, the angular velocity of the bushing (300) may be a relative velocity with respect to the configuration in contact with the outer surface of the bushing (300).

[0214] According to the concept of the present disclosure, the bushing cover (400) is provided to surround the outer surface of the bushing (300) and can rotate at an angular velocity slower than that of the bushing (300) along the rotational direction of the bushing (300). Accordingly, the angular velocity of the bushing (300) relative to the bushing cover (400) may be slower than the angular velocity relative to the cylinder (100) of the bushing (300). As described above, since the friction loss generated as the bushing (300) rotates is proportional to the angular velocity of the bushing (300), the friction loss generated by the bushing (300) can be further reduced.

[0215] Additionally, by placing the bushing (300) and the bushing cover (400) together in the bushing receiving space (131) in which the bushing (300) is received, the size of the bushing (300) can be formed smaller. In other words, by placing the bushing (300) and the bushing cover (400) together in the bushing receiving space (131), the diameter of the bushing (300) can be formed shorter. As described above, since the friction loss generated as the bushing (300) rotates is proportional to the diameter of the bushing (300), the friction loss generated by the bushing (300) can be further reduced.

[0216] That is, by providing a bushing cover (400) between the cylinder (100) and the bushing (300), the friction loss that occurs as the bushing (300) rotates can be further reduced. Accordingly, the compression efficiency of the compression section can be improved, and the failure rate of the compression section can be reduced. In other words, the compression efficiency of the compressor (1) can be improved, and the failure rate of the compressor (1) can be reduced. That is, the performance and reliability of the compressor (1) can be further improved.

[0217] Oil may be provided between the cylinder (100) and the bushing cover (400) and between the bushing (300) and the bushing cover (400). Specifically, oil may be contained within the housing (10, see FIG. 1), and said oil may be supplied between the cylinder (100) and the bushing cover (400) and between the bushing (300) and the bushing cover (400) through the oil passage (32, see FIG. 6 and FIG. 7). The oil may reduce friction between the cylinder (100) and the bushing cover (400) and between the bushing (300) and the bushing cover (400). Accordingly, friction loss occurring as the bushing (300) and the bushing cover (400) rotate may be further reduced.

[0218] Oil may be provided between the mid plate (50) and the bushing (300), between the mid plate (50) and the bushing cover (400), between the cylinder cover (500) and the bushing (300), and between the cylinder cover (500) and the bushing cover (400). The oil can reduce friction between the mid plate (50) and the bushing (300), between the mid plate (50) and the bushing cover (400), between the cylinder cover (500) and the bushing (300), and between the cylinder cover (500) and the bushing cover (400). Accordingly, friction loss occurring as the bushing (300) and the bushing cover (400) rotate can be further reduced.

[0219] The hardness of the bushing cover (400) may be greater than the hardness of the cylinder (100) and less than the hardness of the bushing (300). That is, the bushing cover (400) may have a hardness greater than that of the cylinder (100), and the bushing (300) may have a hardness greater than that of the bushing cover (400). As described above, the bushing cover (400) generates friction loss by rotating relatively slowly, and the bushing (300) generates friction loss by rotating relatively quickly; therefore, due to the difference in hardness as described above, the total amount of friction loss generated by each component can be further reduced.

[0220] The bushing cover (400) may include a material having a relatively low coefficient of friction. Through this configuration, the bushing cover (400) can rotate more smoothly between the cylinder (100) and the bushing (300). Accordingly, friction loss occurring as the bushing (300) and the bushing cover (400) rotate can be further reduced.

[0221] The bushing cover (400) may include a material having relatively low thermal conductivity. In other words, the bushing cover (400) may include a material having relatively high thermal insulation performance. For example, the bushing cover (400) may include a Peek (Polyether ether ketone) material.

[0222] As the bushing (300) and the bushing cover (400) rotate, frictional heat may be generated between the cylinder (100), the bushing (300), and the bushing cover (400). When frictional heat is transferred into the cylinder chamber (110), the temperature of the refrigerant may increase, and consequently, the volume of the refrigerant may increase. If the volume of the refrigerant inside the cylinder chamber (110) increases, the total amount of refrigerant that can be accommodated inside the cylinder chamber (110) may decrease. Therefore, there is a possibility that the volumetric efficiency and compression efficiency of the compression section may be reduced.

[0223] According to the concept of the present disclosure, the bushing cover (400) comprises a material having relatively low thermal conductivity, thereby reducing the transfer of frictional heat generated between the cylinder (100), the bushing (300), and the bushing cover (400) into the cylinder chamber (110). Through this configuration, the volumetric efficiency and compression efficiency of the compression section can be further improved.

[0224] FIG. 12 is a perspective view illustrating the combined appearance of a roller, a bushing, and a bushing cover according to one embodiment. FIG. 13 is a side view illustrating the combined appearance of a roller, a bushing, and a bushing cover according to one embodiment.

[0225] Referring to FIGS. 11 to 13, the vane portion (220) of the roller (200) can be combined with a bushing (300) and a bushing cover (400). For example, the vane portion (220) can be combined with the bushing (300) and the bushing cover (400) by first combining the bushing (300) and the bushing cover (400) and then combining the bushing (300) and the bushing cover (400) simultaneously with the vane portion (220). However, the assembly method of the vane portion (220), the bushing (300), and the bushing cover (400) is not limited to this.

[0226] The vane portion (220) may be provided to penetrate the bushing (300) and the bushing cover (400), respectively. Specifically, the second vane body (222) of the vane portion (220) may be provided to penetrate the bushing opening (350) of the bushing (300) and the cover opening (420) of the bushing cover (400), respectively. Accordingly, at least a portion of the second vane body (222) may be provided on the outside of the bushing (300).

[0227] The cover opening (350) may extend in a first direction (D1) to which the rotation axis (A2) of the bushing (300) and the bushing cover (400) extends. The cover opening (350) may extend in a second direction (D2) that intersects the first direction (D1). For example, the first direction (D1) and the second direction (D2) may be orthogonal to each other. For example, the shape of the cover opening (350) may be approximately rectangular.

[0228] As described above, the bushing (300) can rotate together with the vane portion (220). Specifically, the bushing (300) can rotate together with the vane portion (220) about the rotation axis (A2). Additionally, the bushing cover (400) can also rotate about the rotation axis (A2). At this time, since the rotation axis (A2) can extend in a first direction (D1) and the second direction (D2) can intersect with the first direction (D1), as the bushing (300), the vane portion (220), and the bushing cover (400) rotate about the rotation axis (A2), the vane portion (220) and the cover opening (420) can move in the second direction (D2).

[0229] As described above, the bushing cover (400) can rotate more slowly than the bushing (300). That is, the bushing cover (400) can rotate more slowly than the bushing (300) and the vane portion (220). Accordingly, as the bushing cover (400) rotates, the speed at which the cover opening (420) moves along the second direction (D2) can be slower than the speed at which the vane portion (220) moves along the second direction (D2) as the bushing (300) rotates.

[0230] According to the concept of the present disclosure, the length (L1) through which the cover opening (420) is opened with respect to the second direction (D2) may be longer than the thickness (L2) of one end of the vane portion (220). In other words, the length (L1) through which the cover opening (420) is opened with respect to the second direction (D2) may be longer than the thickness (L2) of the second vane body (222). Through this configuration, the vane portion (220) can rotate sufficiently while penetrating the cover opening (420), and interference between the vane portion (220) and the bushing cover (400) can be prevented.

[0231] Below, with reference to FIGS. 14 to 20, we will examine the compression process of the refrigerant by the roller body (210), the movement and rotation method of the vane part (220) accompanying it, and the rotation method of the bushing (300) and the bushing cover (400).

[0232] FIG. 14 is a cross-sectional view along the line DD' shown in FIG. 11. FIG. 15 is an enlarged view of area E shown in FIG. 14. FIG. 16 is a cross-sectional view showing the roller shown in FIG. 14 moving along the inner wall of the cylinder. FIG. 17 is an enlarged view of area G shown in FIG. 16.

[0233] Referring to FIGS. 14 to 17, the refrigerant supplied to the cylinder (100) can be introduced into the cylinder chamber (110) through the inlet hole (120). Specifically, the refrigerant can be introduced into the inlet chamber (111).

[0234] Due to the pressure of the refrigerant flowing into the inlet chamber (111), the roller body (210) of the roller (200) can move along the inner surface of the cylinder (100). For example, based on FIGS. 14 and FIGS. 16, the roller body (210) can move clockwise along the inner surface of the cylinder (100).

[0235] As the roller body (210) moves along the inner surface of the cylinder (100), the refrigerant contained in the compression chamber (112) can be compressed. When the pressure of the refrigerant compressed in the compression chamber (112) rises above a certain level, the valve (700) can open the connection hole (511) of the cylinder cover (500). Accordingly, the refrigerant compressed in the compression chamber (112) can be discharged to the outside of the cylinder (100) through the connection hole (511). (See FIG. 6)

[0236] As the roller body (210) moves along the inner surface of the cylinder (100), the vane portion (220) can rotate and move. For example, the vane portion (220) can move radially along the roller body (210) while passing through the bushing (300). For example, based on FIGS. 15 and 17, the vane portion (220) can rotate clockwise together with the bushing (300).

[0237] The bushing cover (400) can rotate as the bushing (300) rotates. For example, based on FIGS. 15 and FIGS. 17, the bushing cover (400) can rotate clockwise together with the bushing (300).

[0238] Figure 18 is a drawing showing the superposition of the F region shown in Figure 15 and the H region shown in Figure 17.

[0239] Referring to FIGS. 15, 17 and 18, as the roller body (210) moves along the inner surface of the cylinder (100), the bushing (300) and the bushing cover (400) can rotate together clockwise. For example, the bushing (300) can rotate by a first angle (X1), and the bushing cover (400) can rotate by a second angle (X2) smaller than the first angle (X1).

[0240] As described above, the angular velocity of the bushing cover (400) may be slower than the angular velocity of the bushing (300). That is, the angular displacement formed by the bushing cover (400) rotating for a certain period of time may be smaller than the angular displacement formed by the bushing (300) rotating for the same period of time. For example, the second angle (X2) may be smaller than the first angle (X1).

[0241] FIG. 19 is a cross-sectional view showing the roller shown in FIG. 16 moving along the inner wall of the cylinder. FIG. 20 is an enlarged view of area I shown in FIG. 19.

[0242] Referring to FIGS. 16, 17, 19 and 20, the roller body (210) of the roller (200) can move along the inner surface of the cylinder (100) due to the pressure of the refrigerant flowing into the inlet chamber (111). For example, based on FIGS. 16 and 19, the roller body (210) can move clockwise along the inner surface of the cylinder (100).

[0243] As the roller body (210) moves along the inner surface of the cylinder (100), the refrigerant contained in the compression chamber (112) shown in FIG. 16 can be completely discharged through the connection hole (511). Afterward, the valve (700) can close the connection hole (511) of the cylinder cover (500).

[0244] As the roller body (210) moves along the inner surface of the cylinder (100), the inlet chamber (111) shown in FIG. 16 can be converted into the compression chamber (112) shown in FIG. 19, and a new inlet chamber (111) shown in FIG. 19 can be formed again. The refrigerant supplied to the cylinder (100) can be introduced into the new inlet chamber (111), and accordingly, the roller body (210) can continue to move along the inner surface of the cylinder (100).

[0245] As the roller body (210) moves along the inner surface of the cylinder (100), the vane portion (220) can rotate and move. For example, the vane portion (220) can move radially or oppositely to the radial direction of the roller body (210) while passing through the bushing (300). For example, based on FIGS. 17 and FIGS. 20, the vane portion (220) can rotate counterclockwise together with the bushing (300).

[0246] The bushing cover (400) can rotate as the bushing (300) rotates. For example, based on FIGS. 17 and FIGS. 20, the bushing cover (400) can rotate clockwise together with the bushing (300). Even in this case, the angular velocity of the bushing cover (400) may be slower than the angular velocity of the bushing (300).

[0247] FIG. 21 is a cross-sectional view along the CC' line indicated in FIG. 8. FIG. 22 is an enlarged view of the J area indicated in FIG. 21.

[0248] Referring to FIGS. 21 and 22, the bushing cover (400) can be coupled to the mid plate (50). Specifically, the bushing cover (400) can be rotatably coupled to the mid plate (50).

[0249] At least a portion of the bushing cover (400) can be inserted into the cover insertion groove (52) of the mid plate (50). For example, one end of the bushing cover (400) can be inserted into the cover insertion groove (52) of the mid plate (50).

[0250] The cover insertion groove (52) can be formed by being recessed on one side of the mid plate (50). The cover insertion groove (52) can be formed at a position corresponding to the bushing cover (400).

[0251] Referring to FIGS. 4 and 5, the mid plate (50) may include an upper cover insertion groove (52a) and a lower cover insertion groove (52b).

[0252] The upper cover insertion groove (52a) may be provided so that at least a portion of the upper bushing cover (400a) is inserted. For example, the upper cover insertion groove (52a) may be provided so that the lower end of the upper bushing cover (400a) is inserted.

[0253] The upper cover insertion groove (52a) may be formed on the upper surface of the mid plate (50). The upper cover insertion groove (52a) may be formed at a position corresponding to the upper bushing cover (400a).

[0254] The lower cover insertion groove (52b) may be provided so that at least a portion of the lower bushing cover (400b) is inserted. For example, the lower cover insertion groove (52b) may be provided so that the upper end of the lower bushing cover (400b) is inserted.

[0255] The lower cover insertion groove (52b) may be formed on the lower surface of the mid plate (50). The lower cover insertion groove (52b) may be formed at a position corresponding to the lower bushing cover (400b).

[0256] FIG. 23 is a perspective view illustrating a combined mid plate, bushing, and bushing cover according to one embodiment. FIG. 24 is a plan view illustrating a combined mid plate, bushing, and bushing cover according to one embodiment. FIG. 25 is an enlarged view of the K area indicated in FIG. 24.

[0257] Referring to FIGS. 23 to 25, the cover insertion groove (52) may extend along the circumferential direction of the bushing (300). In other words, the cover insertion groove (52) may extend along the circumferential direction of the bushing cover (400). In other words, the bushing cover (400) may extend along the circumferential direction of the bushing (300), and the cover insertion groove (52) may extend along the direction in which the bushing cover (400) extends.

[0258] The bushing cover (400) may be arranged to rotate while inserted into the cover insertion groove (52). Specifically, the bushing cover (400) may rotate about a rotation axis (A2, see FIG. 11) while inserted into the cover insertion groove (52).

[0259] The cover insertion groove (52) may be provided to limit the rotation of the bushing cover (400). In other words, the cover insertion groove (52) may be provided to prevent the bushing cover (400) from rotating beyond a certain angle.

[0260] Referring to FIG. 15, one end of the cover insertion groove (52) along the circumferential direction of the bushing (300) may be provided on the outside of the cylinder chamber (110). Through this configuration, the cover insertion groove (52) can prevent at least a portion of the bushing cover (400) from being inserted into the cylinder chamber (110) as the bushing cover (400) rotates. At this time, the cylinder chamber (110) may be a space formed by the inner surface of the cylinder (100) and may be a space distinct from the cylinder groove (130).

[0261] When a part of the bushing cover (400) is inserted into the cylinder chamber (110), there is a possibility that the roller body (210), which moves along the inner wall of the cylinder (100), may collide with the bushing cover (400). If the roller body (210) collides with the bushing cover (400), significant damage may occur to both the roller body (210) and the bushing cover (400).

[0262] According to the concept of the present disclosure, one end of the cover insertion groove (52) along the circumferential direction of the bushing (300) is provided on the outside of the cylinder chamber (110), thereby preventing damage caused by collision between the roller body (210) and the bushing cover (400).

[0263] Referring to FIGS. 23 to 25, the cover insertion groove (52) may include a first insertion groove (52c) and a second insertion groove (52d). The first insertion groove (52c) may be provided to allow insertion of one end (401) of the bushing cover (400) and a portion extending from the one end (401). The second insertion groove (52d) may be provided to allow insertion of the other end (402) of the bushing cover (400) and a portion extending from the other end (402).

[0264] Each of the first insertion groove (52c) and the second insertion groove (52d) may extend along the circumferential direction of the bushing (300). Each of the first insertion groove (52c) and the second insertion groove (52d) may be provided to restrict the rotation of the bushing cover (400). One end of the first insertion groove (52c) and one end of the second insertion groove (52d) along the circumferential direction of the bushing (300) may each be provided on the outside of the cylinder chamber (110).

[0265] Although not illustrated in the drawings, the bushing cover (400) may be rotatably coupled with the cylinder cover (500, see FIG. 4 and FIG. 5). In this case, the cylinder cover (500) may include a cover insertion groove provided to allow at least a portion of the bushing cover (400) to be inserted. For example, one end of the bushing cover (400) may be inserted into the cover insertion groove (52) of the mid plate (50), and the other end provided on the opposite side of the one end of the bushing cover (400) may be inserted into the cover insertion groove of the cylinder cover (500).

[0266] FIG. 26 is a perspective view illustrating a bushing cover according to one embodiment. FIG. 27 is a perspective view illustrating a combined mid plate, bushing, and bushing cover according to one embodiment. FIG. 28 is a plan view illustrating a combined mid plate, bushing, and bushing cover according to one embodiment. FIG. 29 is an enlarged view of the L area indicated in FIG. 28.

[0267] Hereinafter, a bushing cover (400') according to one embodiment of the present disclosure will be described with reference to FIGS. 26 to 29. In describing the bushing cover (400'), the same reference numerals are assigned to components substantially identical to those shown in FIGS. 1 to 25, and detailed descriptions may be omitted.

[0268] Referring to FIGS. 26 through 29, the compressor (1) may include a bushing cover (400'). At least a portion of the bushing cover (400') may cover the bushing (300). At least a portion of the bushing cover (400') may be arranged to surround the outer surface of the bushing (300).

[0269] The bushing cover (400') may include a cover body (430'). The cover body (430') may cover the bushing (300). The cover body (430') may be provided to surround the outer surface of the bushing (300).

[0270] The bushing cover (400') may include an opening (410'). The opening (410') may be formed between one end (431') of the cover body (430') along the circumferential direction of the bushing (300) and the other end (432') of the cover body (430') provided on the opposite side of the one end (431') of the cover body (430').

[0271] The bushing cover (400') may include a cover opening (420'). The cover opening (420') may be provided in the cover body (430'). The cover opening (420') may be provided on the opposite side of the opening (410').

[0272] The bushing cover (400') may include a protrusion (440'). The protrusion (440') may protrude from the cover body (430'). Specifically, the protrusion (440') may protrude from the cover body (430') along the direction in which the rotation axis (A2, see FIG. 11) of the bushing (300) extends. In other words, the protrusion (440') may protrude from the cover body (430') along the direction in which the rotation axis of the bushing cover (400') extends.

[0273] The protrusion (440') may include a first protrusion (441') and a second protrusion (442'). The first protrusion (441') may protrude in one direction from the cover body (430'), and the second protrusion (442') may protrude in a direction opposite to that direction from the cover body (430'). For example, based on FIG. 26, the first protrusion (441') may protrude upward from the cover body (430'), and the second protrusion (442') may protrude downward from the cover body (430').

[0274] The protrusion (440') may protrude from the portion where the cover opening (420') is provided. For example, the first protrusion (441') and the second protrusion (442') may each protrude from the portion where the cover opening (420') is provided. Due to this configuration, the cover opening (420') may be provided between the first protrusion (441') and the second protrusion (442').

[0275] According to the concept of the present disclosure, the rigidity of the portion surrounding the cover opening (420') can be reinforced by forming a protrusion (440') that protrudes from the portion where the cover opening (420') is provided. For example, based on FIG. 26, the first protrusion (441') is formed to protrude upward from the portion where the cover opening (420') is provided, so that the upper portion of the cover opening (420') can be made relatively thicker, and accordingly, the rigidity of the upper portion of the cover opening (420') can be reinforced. For example, based on FIG. 26, the second protrusion (442') is formed to protrude downward from the portion where the cover opening (420') is provided, so that the lower portion of the cover opening (420') can be made relatively thicker, and accordingly, the rigidity of the lower portion of the cover opening (420') can be reinforced. That is, the rigidity of the bushing cover (400') can be reinforced through the above-described structure.

[0276] The corners formed between the cover body (430') and the protrusion (440') of the bushing cover (400') can be provided in a rounded shape. For example, the corners formed between the cover body (430') and the first protrusion (441') and the corners formed between the cover body (430') and the second protrusion (442') can each be provided in a rounded shape. Through this configuration, the rigidity of the portion surrounding the cover opening (420') can be reinforced. That is, the rigidity of the bushing cover (400') can be reinforced through the above-described structure.

[0277] The bushing cover (400') can be coupled to the mid plate (50'). Specifically, the bushing cover (400') can be rotatably coupled to the mid plate (50').

[0278] At least a portion of the bushing cover (400') can be inserted into the cover insertion groove (52') of the mid plate (50'). For example, one end of the bushing cover (400') can be inserted into the cover insertion groove (52') of the mid plate (50').

[0279] Specifically, at least a portion of the second protrusion (442') can be inserted into the cover insertion groove (52') of the mid plate (50'). For example, based on FIG. 27, the lower end of the second protrusion (442') can be inserted into the cover insertion groove (52') of the mid plate (50').

[0280] The cover insertion groove (52') may be formed by being recessed on one side of the mid plate (50'). For example, based on FIG. 27, the cover insertion groove (52') may be formed by being recessed on the upper surface of the mid plate (50'). The cover insertion groove (52') may be formed at a position corresponding to the bushing cover (400').

[0281] The cover insertion groove (52') may extend along the circumferential direction of the bushing (300). The bushing cover (400') may be arranged to rotate while inserted into the cover insertion groove (52'). The cover insertion groove (52') may be arranged to restrict the rotation of the bushing cover (400').

[0282] The cover insertion groove (52') may include a first insertion groove (52c') and a second insertion groove (52d'). The first insertion groove (52c') may be provided so that one end (4421') of the second protrusion (442') is inserted. The second insertion groove (52d') may be provided so that the other end (4421') of the second protrusion (442') is inserted.

[0283] Each of the first insertion groove (52c') and the second insertion groove (52d') may extend along the circumferential direction of the bushing (300). Each of the first insertion groove (52c') and the second insertion groove (52d') may be provided to restrict the rotation of the bushing cover (400').

[0284] Specifically, the first insertion groove (52c') and the second insertion groove (52d') can each limit the rotation of the bushing cover (400') by limiting the rotation of the second protrusion (442'). At this time, the length of the second protrusion (442') extending along the circumferential direction of the bushing (300) may be shorter than the length of the cover body (430') extending along the circumferential direction of the bushing (300). Therefore, the length of the first insertion groove (52c') and the second insertion groove (52d') each extending along the circumferential direction of the bushing (300) may be relatively short. For example, the length of each of the first insertion groove (52c') and the second insertion groove (52d') extending along the circumferential direction of the bushing (300) may be shorter than the length of each of the first insertion groove (52c) and the second insertion groove (52d) extending along the circumferential direction of the bushing (300) as illustrated in FIGS. 22 to 24.

[0285] Although not shown in the drawings, the bushing cover (400') may be rotatably coupled with the cylinder cover (500, see FIG. 4 and FIG. 5). In this case, the cylinder cover (500) may include a cover insertion groove provided to allow at least a portion of the first protrusion (441') to be inserted.

[0286] In the present disclosure, an embodiment has been described in which the bushing cover (400') includes both the first protrusion (441') and the second protrusion (442'). However, the bushing cover (400') is not required to include both the first protrusion (441') and the second protrusion (442'). For example, the bushing cover (400') may include only one of the first protrusion (441') and the second protrusion (442').

[0287] A compressor (1) according to one embodiment comprises a cylinder (100) including a chamber (110) provided inside, and a roller (200) provided to compress a refrigerant contained in the chamber (110), wherein the roller (200) comprises a roller body (210) movable along the inner surface of the cylinder (100) in the chamber (110), and a vane portion (220) extending from the roller body (210) toward the cylinder (100) and forming an inlet chamber (111) capable of containing the refrigerant and a compression chamber (112) capable of compressing the refrigerant, and wherein the roller (200) comprises a vane portion (220) movable along the radial direction of the roller body (210) based on the movement of the roller body (210), and a bushing (300) provided within the cylinder (100), rotatable with respect to the cylinder (100), and covering at least a portion of the vane portion (220), wherein the vane portion (220) moves along the radial direction The apparatus includes a supporting bushing (300) and a bushing cover (400, 400') that surrounds the outer surface of the bushing (300) and is rotatable along the rotational direction of the bushing (300), and the roller (200), the bushing (300), and the bushing cover (400, 400') are configured such that as the roller body (210) moves along the inner surface, the bushing (300) supports movement along the radial direction of the vane portion (220), the size of the inlet chamber (111) increases to move the refrigerant to the chamber (110), and the size of the compression chamber (112) decreases to compress the refrigerant moved into the chamber (110).

[0288] The bushing cover (400, 400') may extend along the circumferential direction of the bushing (300) between the cylinder (100) and the bushing (300).

[0289] The bushing cover (400) may include an opening (410) formed between a first end (401) of the bushing cover (400) and a second end (402) of the bushing cover (400) provided on the opposite side of the first end (401) along the circumferential direction of the bushing (300), and provided to allow the vane portion (220) to pass through.

[0290] The bushing (300) may be rotatable with respect to a rotation axis (A2) parallel to the center axis (A1) of the roller body (210). The bushing cover (400, 400') may be rotatable with respect to the rotation axis (A2).

[0291] Each of the above bushing (300) and the above bushing cover (400, 400') may be arranged to rotate as the roller body (210) moves along the inner surface.

[0292] When the roller body (210) moves along the inner surface, the angular velocity at which the bushing cover (400, 400') rotates may be slower than the angular velocity at which the bushing (300) rotates.

[0293] The compressor (1) may further include a plate (50, 50') provided on one side of the cylinder (100) to form the chamber (110) together with the cylinder (100), and including an insertion groove (52, 52') provided to insert at least a part of the bushing cover (400, 400').

[0294] The above insertion groove (52, 52') can be extended along the circumferential direction of the bushing (300).

[0295] The bushing cover (400, 400') may be arranged to rotate while inserted into the insertion groove (52, 52'). At least one end of the insertion groove (52, 52') along the circumferential direction of the bushing (300) may be provided on the outside of the chamber (110).

[0296] The vane portion (220) may include a first vane body (221) that protrudes radially from the roller body (210) and is covered by the bushing (300), and a second vane body (222) that protrudes radially from the first vane body (221) and extends to the outside of the bushing (300). The bushing (300) may include a bushing opening (350) provided to allow the second vane body (222) to pass through. The bushing cover (400, 400') may include a cover opening (420, 420') provided to allow the second vane body (222) to pass through.

[0297] The above cover opening (420, 420') may be extended along a first direction (D1) in which the rotation axis (A2) of the bushing cover (400, 400) extends and a second direction (D2) intersecting the first direction (D1). The length (L1) of the cover opening (420, 420') along the second direction (D2) may be longer than the thickness (L2) of the second vane body (222) along the second direction (D2).

[0298] Oil may be contained between the cylinder (100) and the bushing cover (400, 400) and between the bushing (300) and the bushing cover (400, 400).

[0299] The hardness of the bushing cover (400, 400) may be greater than the hardness of the cylinder (100) and smaller than the hardness of the bushing (300).

[0300] The bushing cover (400') may further include a cover body (430') having the cover opening (420'), and a protrusion (440') that protrudes from the cover body (430') along the direction in which the rotation axis (A2) of the bushing (300) extends.

[0301] The compressor (1) may further include a plate (50') provided on one side of the cylinder (100) to form the chamber (110) together with the cylinder (100). The plate (50') may include an insertion groove (52') provided to allow at least a portion of the protrusion (440') to be inserted.

[0302] A compressor (1) according to one embodiment comprises a cylinder (100) having a cylinder chamber (110) provided inside, a roller (200) provided to compress a refrigerant contained in the cylinder chamber (110), a roller body (210) provided to move along the inner surface of the cylinder (100) in the cylinder chamber (110), and a vane portion (220) extending from the roller body (210) toward the cylinder (100) to partition the cylinder chamber (110), a bushing (300) rotatably coupled to the cylinder (100) and provided to have at least a portion of the vane portion (220) inserted therein, a first cover portion (310) provided to cover one side of the vane portion (220), a second cover portion (320) provided to cover another side (229) provided opposite to one side (228) of the vane portion (220), and the first It includes a bushing (300) comprising a connecting portion (330) connecting a cover portion (310) and a second cover portion (320), and a bushing cover (400, 400') disposed between the cylinder (100) and the bushing (300) and arranged to surround the outer surface of each of the first cover portion (310), the second cover portion (320), and the connecting portion (330).

[0303] The bushing (300) may further include a bushing groove (340) formed by the first cover portion (310), the second cover portion (320), and the connecting portion (330), and a bushing opening (350) connected to the bushing groove (340) and provided so that one end of the vane portion (220) passes through. The bushing cover (400, 400') may include a cover opening (420, 420') formed at a position corresponding to the bushing opening (350) and provided so that one end of the vane portion (220) passes through.

[0304] The above cover opening (420, 420') may be extended along a first direction (D1) in which the rotation axis (A2) of the bushing (300) extends and a second direction (D2) intersecting the first direction (D1). With respect to the second direction (D2), the length (L1) in which the cover opening (420, 420') is opened may be longer than the thickness (L2) of one end of the vane portion (220).

[0305] A compressor (1) according to one embodiment comprises a cylinder (100), a plate (50, 50') provided on one side of the cylinder (100) and forming a cylinder chamber (110) together with the cylinder (100), and a roller (200) provided to compress a refrigerant contained in the cylinder chamber (110), the roller (200) comprising a roller body (210) provided to move along the inner surface of the cylinder (100) in the cylinder chamber (110) and a vane portion (220) extending from the roller body (210) toward the cylinder (100) to partition the cylinder chamber (110); a bushing (300) rotatably coupled to the cylinder (100) and provided to cover at least a portion of the vane portion (220); and a bushing provided to surround the outer surface of the bushing (300) and coupled to each of the cylinder (100) and the plate (50, 50'). Includes a cover (400, 400').

[0306] The above plate (50, 50') may include an insertion groove (52, 52') provided so that at least a portion of the bushing cover (400, 400') is inserted.

[0307] According to the concept of the present disclosure, a bushing cover may be provided on the outer side of the bushing coupled to the vane. Accordingly, friction loss occurring in the bushing may be reduced.

[0308] According to the concept of the present disclosure, by reducing friction losses occurring in the bushing, the compression efficiency of the compressor can be improved and the failure rate of the compressor can be reduced. In other words, the performance and reliability of the compressor can be further improved.

[0309] 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 from the description below.

[0310] 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. A cylinder including a chamber provided inside; A roller provided within the chamber and configured to compress a refrigerant contained in the chamber, comprising: a roller body movable along the inner surface of the cylinder in the chamber; and a vane extending from the roller body toward the cylinder, which at least partially partitions the chamber to form an inlet chamber capable of receiving the refrigerant and a compression chamber capable of compressing the refrigerant, and which is movable along the radial direction of the roller body based on the movement of the roller body. A bushing provided within the cylinder, rotatable with respect to the cylinder, and covering at least a portion of the vane portion, supporting the movement of the vane portion along the radial direction; and It includes a bushing cover that surrounds the outer surface of the bushing and is rotatable along the rotational direction of the bushing, A compressor in which the roller, the bushing, and the bushing cover are arranged such that, as the roller body moves along the inner surface, the bushing supports movement along the radial direction of the vane portion, the size of the inlet chamber is increased to move the refrigerant into the chamber, and the size of the compression chamber is decreased to compress the refrigerant moved into the chamber.

2. In Paragraph 1, The above bushing cover is a compressor that extends along the circumferential direction of the bushing between the cylinder and the bushing.

3. In Paragraph 2, The above bushing cover is, A compressor comprising an opening provided between a first stage of the bushing cover and a second stage of the bushing cover provided on the opposite side of the first stage along the circumferential direction, wherein the vane portion is provided to pass through.

4. In Paragraph 1, The above bushing is rotatable about a rotation axis parallel to the center axis of the roller body, and The above bushing cover is a compressor rotatable about the above rotation axis.

5. In Paragraph 4, A compressor in which the bushing and the bushing cover, respectively, are arranged to rotate as the roller body moves along the inner surface.

6. In Paragraph 5, A compressor in which, when the roller body moves along the inner surface, the angular velocity at which the bushing cover rotates is slower than the angular velocity at which the bushing rotates.

7. In Paragraph 4, A compressor further comprising a plate provided on one side of the cylinder to form the chamber together with the cylinder, the plate including an insertion groove into which at least a portion of the bushing cover is inserted.

8. In Paragraph 7, The above insertion groove is a compressor that extends along the circumferential direction of the bushing.

9. In Paragraph 8, The above bushing cover is arranged to rotate while inserted into the insertion groove, and A compressor in which at least one end of the insertion groove along the circumferential direction of the bushing is provided on the outside of the chamber.

10. In Paragraph 1, The above vane part is, A first vane body protruding radially from the roller body and covered by the bushing; and It includes a second vane body that protrudes radially from the first vane body and extends to the outside of the bushing, The above bushing includes a bushing opening provided for the second vane body to pass through, and The above bushing cover is a compressor comprising a cover opening through which the second vane body passes.

11. In Paragraph 10, The above cover opening extends along a first direction in which the rotation axis of the bushing cover extends and a second direction intersecting the first direction, and A compressor in which the length of the cover opening according to the second direction is longer than the thickness of the second vane body according to the second direction.

12. In Paragraph 1, A compressor capable of accommodating oil between the cylinder and the bushing cover and between the bushing and the bushing cover.

13. In Paragraph 1, A compressor in which the hardness of the bushing cover is greater than the hardness of the cylinder and smaller than the hardness of the bushing.

14. In Paragraph 10, The above bushing cover is, A cover body having the above-mentioned cover opening; and A compressor further comprising a protrusion that protrudes along the direction in which the rotation axis of the bushing extends from the cover body.

15. In Paragraph 14, It further includes a plate provided on one side of the cylinder to form the chamber together with the cylinder, and The above plate is, A compressor comprising an insertion groove into which at least a portion of the above-mentioned protrusion is inserted.

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