Linear compressor

Abstract

The present invention relates to a linear compressor. A linear compressor according to an embodiment of the present invention may comprise: a cylinder into which a reciprocating piston is inserted and which forms a space that is compressed by the piston; a discharge valve provided so as to be movable in order to open or close the compression space; a valve spring elastically supporting the discharge valve; and a spring bracket supporting the valve spring and having a portion supported by the cylinder. This configuration enables vibration and noise generated in the discharge valve to be reduced.

Description

Linear compressor

[0001] The present invention relates to a linear compressor.

[0002] In a reciprocating compressor, a compression space for compressing the working gas is formed between the piston and the cylinder, and the piston compresses the refrigerant introduced into the compression space as it moves in a straight line back and forth inside the cylinder.

[0003] Recently, among the aforementioned reciprocating compressors, many linear compressors have been developed that are simple in structure and can improve compression efficiency without mechanical losses occurring when converting the motor's rotational motion into linear motion, by directly connecting the piston to a drive motor that performs reciprocating linear motion.

[0004] Generally, a linear compressor is configured such that a piston moves in a reciprocating linear motion inside a cylinder driven by a linear motor within a sealed shell, drawing in and compressing refrigerant, and then discharging it. The high-temperature refrigerant compressed in the compression space of the cylinder can flow toward the discharge cover via a discharge valve.

[0005] According to conventional linear compressors, there was a problem in that a tapping sound was generated when the discharge valve struck the cylinder during the opening and closing process of the discharge valve, and the generated tapping sound was transmitted to the outside of the compressor through the discharge cover.

[0006] In addition, there was a problem in that the support structure for supporting the discharge valve on the discharge cover side was complex, making manufacturing difficult, and vibration occurred between the multiple parts constituting the support structure, resulting in additional noise.

[0007] Information on prior art related to linear compressors is as follows.

[0008] Korean Registered Patent Publication No. 10-2357601 (January 26, 2022), Title of Invention: Linear Compressor

[0009] The present invention aims to provide a linear compressor capable of preventing tossing sounds generated at the discharge valve from being transmitted to the outside of the compressor through the discharge cover by improving the structure of the discharge valve assembly.

[0010] The present invention aims to provide a linear compressor capable of reducing noise by improving the structure of a valve spring supporting a discharge valve and a spring bracket supporting the valve spring, thereby reducing vibrations generated in the discharge valve at the valve spring and the spring bracket.

[0011] In particular, the purpose is to provide a linear compressor in which the spring bracket is formed by injection molding of the valve spring, thereby enabling a robust support structure for the valve spring and the spring bracket.

[0012] In addition, the above spring bracket is intended to provide a linear compressor that can be composed of a material that facilitates vibration reduction and has excellent heat resistance.

[0013] The present invention aims to provide a linear compressor capable of reducing vibration between parts compared to a structure composed of multiple parts by simply implementing a structure that supports a discharge valve.

[0014] The present invention aims to provide a linear compressor in which the discharge valve assembly can be firmly supported on a discharge cover or surrounding structure through a press-fit method, and vibrations generated in the discharge valve can be easily damped.

[0015] In particular, the spring bracket constituting the discharge valve assembly is made of rubber material and aims to provide a linear compressor that can be easily deformed during press-fitting.

[0016] The present invention aims to provide a linear compressor that facilitates press-fitting by deformation of the spring bracket and maintains damping force when the discharge valve assembly is pressed into a discharge cover or surrounding structure by implementing a weight reduction structure in the spring bracket supporting the valve spring.

[0017] The present invention aims to provide a linear compressor capable of preventing leakage of discharged refrigerant when the discharge valve is closed, by including a first part that is pressed into the cylinder when the spring bracket is seated in the cylinder.

[0018] In particular, the first part comprises a plurality of support members that are pressed into the cylinder, and the plurality of support members are spaced apart from each other to provide a deformation space for the first part and to provide a linear compressor capable of maintaining a damping force.

[0019] The present invention aims to provide a linear compressor that can secure a space for the spring bracket to deform when the spring bracket is pressed into the cylinder, by including a second portion of the spring bracket spaced apart from the cylinder by a set gap.

[0020] A linear compressor according to an embodiment of the present invention may include a cylinder into which a reciprocating piston is inserted and which forms a space to be compressed by said piston, a discharge valve movably provided for opening or closing said compression space, a valve spring elastically supporting said discharge valve, and a spring bracket having a portion that supports said valve spring and is supported by said cylinder. With this configuration, vibration and noise generated at the discharge valve can be reduced.

[0021] The above spring bracket includes a first part that is pressed into the cylinder, thereby preventing leakage of gas discharged through the discharge valve.

[0022] The first part above includes a plurality of support members that are pressed into the cylinder, and the plurality of support members are spaced apart from each other to provide a deformation space for the first part and maintain a damping force.

[0023] The spring bracket includes a second portion spaced apart from the cylinder by a set gap, providing a space in which the spring bracket can be deformed when pressed into the cylinder.

[0024] The device further includes a discharge cover having a discharge chamber through which refrigerant discharged through the open discharge valve flows, and the spring bracket can be supported on the discharge cover.

[0025] The above spring bracket may include a third part that is pressed into the discharge cover.

[0026] The press-fit member into which the third part is pressed into the discharge cover can form a set press-fit member. Accordingly, if the press-fit member is too small, the phenomenon of the spring bracket separating from the discharge cover can be prevented, and if the press-fit member is too large, assembly defects can be prevented or the damping force through the spring bracket can be reduced.

[0027] The above spring bracket can be made of a rubber material that is easy to press-fit, effectively reduces vibration, and has excellent heat resistance. For example, the above spring bracket can be made of fluoroelastomer (FKM) material.

[0028] The above spring bracket can be injection molded into the above valve spring.

[0029] The above-mentioned cylinder further includes a sealing bracket supported on a flange, and the spring bracket may include a fourth portion supported on the sealing bracket.

[0030] The above fourth part can be pressed into the sealing bracket.

[0031] The first part and the fourth part may be positioned adjacent to the area where the discharge valve strikes the cylinder. Accordingly, the spring bracket can easily reduce noise generated from the discharge valve through the first part pressed into the cylinder and the fourth part pressed into the sealing bracket.

[0032] The above spring bracket includes a portion (edge ​​support portion) that supports the edge of the valve spring, and the edge support portion is configured to have a thickness greater than the thickness of the valve spring so as to maintain the damping force of the spring bracket and be advantageous in high-temperature environments.

[0033] The above-mentioned rim support includes a shear support member that supports the axial front end of the valve spring and a rear end support member that supports the axial rear end, and at least one of the shear support member and the rear end support member may have a thickness greater than or equal to the thickness of the valve spring.

[0034] In one aspect of the present invention, a linear compressor may include a cylinder into which a piston reciprocating in the axial direction is inserted and which forms a compression space; a discharge valve for discharging refrigerant compressed in the compression space; a discharge cover for forming a discharge chamber for the refrigerant discharged through the discharge valve; and a valve spring that elastically supports the discharge valve.

[0035] The above linear compressor may include a spring bracket comprising an inner surface supporting the valve spring, an outer surface supported by the discharge cover, and an end portion seated on the cylinder.

[0036] The inner surface, outer surface, and cylinder support of the above spring bracket may be integrally formed.

[0037] The above spring bracket includes a first wall including the outer surface and a second wall including the inner surface, and the axial length of the second wall may be formed to be longer than the axial length of the first wall.

[0038] The first wall is configured to surround at least a portion of the second wall, and the spring bracket includes a projection provided in a stepped portion between the first wall and the second wall, and the projection may be positioned to be supported on the discharge cover.

[0039] The above-mentioned protrusions include a plurality of protrusions arranged in the circumferential direction of the spring bracket, and a space portion may be formed between the plurality of protrusions to provide a deformation space for the spring bracket.

[0040] The end seated on the cylinder above can form the end of the second wall above.

[0041] The outer surface of the above spring bracket can be pressed into the discharge cover having a first press-fit member.

[0042] The end of the above spring bracket may include a cylinder support that is pressed into the cylinder having a second press-fit member.

[0043] The cylinder support member includes a first support member and a second support member spaced apart from each other to be pressed into the cylinder, and a support groove may be formed between the first and second support members to provide a deformation space upon pressing.

[0044] The above cylinder includes a cylinder body extending axially for the insertion of the piston and a cylinder flange extending radially from the cylinder body, and the cylinder support can be pressed into a first flange provided on the cylinder flange.

[0045] The cylinder flange may further include a second flange formed with a step relative to the first flange, and a sealing bracket that is pressed into the second flange having a third press-fit member.

[0046] The inner surface of the spring bracket may be spaced apart from the cylinder by a gap (G1) set.

[0047] The cylinder includes an end portion forming a contact surface to which the discharge valve contacts and an outer surface of the cylinder connecting the end portion of the cylinder and the first jaw, and the inner surface of the spring bracket may be spaced apart from the outer surface of the cylinder by the set gap (G1).

[0048] The valve spring comprises a projection coupling portion to which a projection of the discharge valve is coupled, and a plurality of spring extension portions extending in a spiral shape from a plurality of points of the projection coupling portion, and the inner surface of the spring bracket may include a spring coupling portion into which the plurality of spring extension portions are inserted.

[0049] The above spring bracket includes a first spring support and a second spring support that support both axial ends of the valve spring, and at least one of the first and second spring support may have an axial thickness (t2, t3) greater than the axial thickness (t1) of the valve spring.

[0050] The above spring bracket can be injection molded onto the valve spring.

[0051] In another aspect of the present invention, a linear compressor comprises: a cylinder including a cylinder body into which a piston reciprocating in the axial direction is inserted and a cylinder flange extending radially from the cylinder body; a discharge valve for discharging refrigerant compressed in the compression space of the cylinder; a discharge cover forming a discharge chamber for the refrigerant discharged through the discharge valve; a valve spring elastically supporting the discharge valve; and a spring bracket supporting the valve spring, wherein the spring bracket may include an outer surface portion that is pressed into the discharge cover having a first press-fit portion.

[0052] The above spring bracket may include a first wall that forms the outer surface of the spring bracket and forms the maximum diameter of the spring bracket.

[0053] The spring bracket includes a second wall having an inner surface portion to which the valve spring is coupled, which forms a diameter smaller than that of the first wall, and the inner surface portion may be spaced apart from the cylinder body by a set gap.

[0054] The second wall may include a cylinder support provided at the end of the second wall and pressed into the cylinder flange with a second press-fit member.

[0055] The cylinder further includes a sealing bracket that surrounds at least a portion of the cylinder flange, and the spring bracket may include a plurality of protrusions arranged circumferentially, having a support surface that rests on the sealing bracket.

[0056] The above spring bracket may be made of a rubber material to enable press-fitting.

[0057] In another aspect of the present invention, a linear compressor may include a cylinder into which a piston reciprocating in the axial direction is inserted and which forms a compression space; a discharge valve for discharging refrigerant compressed in the compression space; a discharge cover for forming a discharge chamber for the refrigerant discharged through the discharge valve; a valve spring that elastically supports the discharge valve; and a spring bracket comprising an inner surface supporting the valve spring, an outer surface supported by the discharge cover, and an end portion seated on the cylinder.

[0058] The inner surface of the spring bracket can be positioned apart from the cylinder by a gap set thereon.

[0059] The cylinder includes a cylinder body extending in the axial direction and a cylinder flange extending radially from the cylinder body, and the inner surface of the spring bracket may be spaced apart from the circumferential surface of the cylinder flange by the set gap.

[0060] The above spring bracket includes a first wall forming the outer surface and a second wall forming the inner surface having a diameter smaller than that of the first wall, and the end seated on the cylinder may form the end of the second wall.

[0061] The outer surface of the above spring bracket can be pressed into the above discharge cover.

[0062] The end of the above spring bracket can be pressed into the above cylinder.

[0063] According to an embodiment of the present invention, by improving the structure of the discharge valve assembly, the tossing sound generated at the discharge valve can be prevented from being transmitted to the outside of the compressor through the discharge cover.

[0064] According to an embodiment of the present invention, by improving the structure of a valve spring supporting a discharge valve and a spring bracket supporting the valve spring, vibrations generated in the discharge valve are reduced in the valve spring and the spring bracket, thereby reducing noise.

[0065] In particular, the above spring bracket is formed by an injection molding method for the valve spring, so that a robust support structure for the valve spring and the spring bracket can be achieved.

[0066] In addition, the above spring bracket is made of a material that facilitates vibration reduction and has excellent heat resistance, which can reduce noise on the discharge valve side and be advantageous in high-temperature environments on the discharge cover side.

[0067] According to an embodiment of the present invention, by simply implementing a structure that supports a discharge valve, vibration between parts can be reduced compared to a structure composed of multiple parts.

[0068] According to an embodiment of the present invention, a discharge valve assembly can be firmly supported on a discharge cover or surrounding structure through a press-fit method, and vibrations generated in the discharge valve can be easily damped.

[0069] In particular, the spring bracket constituting the discharge valve assembly is made of rubber material and can be easily deformed during press-fitting.

[0070] According to an embodiment of the present invention, a weight reduction structure is implemented in a spring bracket supporting a valve spring, so that when a discharge valve assembly is pressed into a discharge cover or surrounding structure, the pressing is facilitated by the deformation of the spring bracket and the damping force can be maintained.

[0071] According to an embodiment of the present invention, when the spring bracket is seated in the cylinder, a first portion is pressed into the cylinder, thereby preventing leakage of the discharged refrigerant when the discharge valve is closed.

[0072] In particular, the first part includes a plurality of support members that are pressed into the cylinder, and the plurality of support members are spaced apart from each other to provide a deformation space for the first part and maintain a damping force.

[0073] According to an embodiment of the present invention, the spring bracket includes a second portion spaced apart from the cylinder by a set gap, thereby securing a space for the spring bracket to deform when the spring bracket is pressed into the cylinder.

[0074] FIG. 1 is a cross-sectional view of a linear compressor according to an embodiment of the present invention.

[0075] FIG. 2 is an exploded perspective view showing the configuration of a discharge cover assembly and a discharge valve assembly according to an embodiment of the present invention.

[0076] FIG. 3 is an exploded perspective view showing the configuration of a cylinder and a frame according to an embodiment of the present invention.

[0077] FIG. 4 is a cross-sectional view showing a discharge valve assembly and its surrounding configuration according to an embodiment of the present invention.

[0078] Figure 5 is a cross-sectional view taken along 5-5 of Figure 1.

[0079] FIG. 6 is a front exploded perspective view showing the configuration of a discharge valve assembly according to an embodiment of the present invention.

[0080] FIG. 7 is a rear exploded perspective view showing the configuration of a discharge valve assembly according to an embodiment of the present invention.

[0081] FIG. 8 is a bottom view showing the configuration of a valve support device according to an embodiment of the present invention.

[0082] Figure 9 is a cross-sectional view taken along 9-9 of Figure 6.

[0083] Figure 10 is a cross-sectional view taken along 10-10 of Figure 6.

[0084] FIG. 11 is a perspective view showing a damping member installed on a first discharge cover according to an embodiment of the present invention.

[0085] FIG. 12 is a lower perspective view of a first discharge cover according to an embodiment of the present invention.

[0086] FIG. 13 is an upper perspective view of a damping member according to an embodiment of the present invention.

[0087] FIG. 14 is an upper perspective view of a second discharge cover according to an embodiment of the present invention.

[0088] FIG. 15 is a lower perspective view of a second discharge cover according to an embodiment of the present invention.

[0089] FIG. 16 is an upper perspective view of a third discharge cover according to an embodiment of the present invention.

[0090] FIG. 17 is a drawing showing an enlarged view of section A of FIG. 5, showing the discharge valve assembly pressed into the discharge cover and sealing bracket.

[0091] FIG. 18 is a drawing showing the arrangement of the discharge valve assembly and cylinder by enlarging section "A" of FIG. 5.

[0092] FIG. 19 is a cross-sectional view showing the appearance of a refrigerant flowing through the discharge chamber of a discharge cover assembly according to an embodiment of the present invention.

[0093] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0094] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended only to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms. Where it is stated that a component is "connected," "combined," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but that another component may also be "connected," "combined," or "connected" between each component.

[0095] FIG. 1 is a cross-sectional view of a linear compressor according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing the configuration of a discharge cover assembly and a discharge valve assembly according to an embodiment of the present invention, FIG. 3 is an exploded perspective view showing the configuration of a cylinder and a frame according to an embodiment of the present invention, FIG. 4 is a cross-sectional view showing a discharge valve assembly and its surrounding configuration according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view cut along 5-5 of FIG. 1.

[0096] Referring to FIGS. 1 to 5, a linear compressor (10) according to an embodiment of the present invention may include a shell (11) and a first shell cover (12) and a second shell cover (13) coupled to both sides of the shell (11). In a broad sense, the first shell cover (12) and the second shell cover (13) may be understood as components of the shell (11).

[0097] The shell (11) has a roughly cylindrical shape and can be arranged in a horizontally lying position or in an axially lying position. Based on FIG. 1, the shell (11) is extended horizontally and may have a somewhat lower height in the radial direction.

[0098] Since the linear compressor (10) can have a low height, for example, when the linear compressor (10) is installed on the base of the machine room of a refrigerator, there is an advantage that the height of the machine room can be reduced.

[0099] The above linear compressor (10) may include a plurality of pipes that are provided in the shell (11) or shell cover (12, 13) and can suck in, discharge, or inject refrigerant.

[0100] The plurality of pipes may include a suction pipe (14) that allows the refrigerant to be sucked into the interior of the linear compressor (10). The suction pipe (14) may be connected to the first shell cover (12). The refrigerant may be sucked into the interior of the linear compressor (10) along the axial direction through the suction pipe (14).

[0101] The plurality of pipes may further include a discharge pipe (not shown) for allowing compressed refrigerant to be discharged from the linear compressor (10) and a process pipe (not shown) for replenishing refrigerant to the linear compressor (10). For example, the discharge pipe and the process pipe may be connected to the outer surface of the shell (11).

[0102] Support devices (20, 90) that support the main body of the linear compressor (10) may be included on both sides of the shell (11). The support devices (20, 90) may include a first support device (20) that is coupled to the first shell cover (12) and elastically supports the main body of the linear compressor (10).

[0103] Here, the main body of the compressor refers to a component provided inside the shell (11), and may include, for example, a drive unit that moves back and forth and a support unit that supports the drive unit. The drive unit may include a piston (70), a permanent magnet (45), a supporter (33), and an intake muffler (25), etc. And, the support unit may include a resonant spring (30), a rear cover (31), a stator cover (32), a first support device (20), and a second support device (90), etc.

[0104] The first support device (20) may include a support bracket (21a) communicating with the suction pipe (14) and a support spring (21b) coupled to the support bracket (21a) and supported by the rear cover (31).

[0105] The above support device (20, 90) may include a second support device (90) that is coupled to the shell (11) and supports the discharge cover assembly.

[0106] The above linear compressor (10) may include a frame (50) provided inside the compressor shell (11) and a cylinder (60) inserted inside the frame (50).

[0107] The frame (50) is understood as a configuration for fixing the cylinder (60). For example, the cylinder (60) may be pressed into the inside of the frame (50). The cylinder (60) and the frame (50) may be made of a metal material, for example, aluminum or an aluminum alloy.

[0108] The frame (50) is positioned to surround the cylinder (60). That is, the cylinder (60) can be positioned to be received inside the frame (50).

[0109] The above frame (50) has a hollow cylindrical shape and includes a frame body (51) that extends axially to allow the cylinder (60) to be inserted, and a frame flange (52) that extends radially outward from the front portion of the frame body (51).

[0110] Defines the direction.

[0111] "Axial direction" can be understood as the direction in which the piston (70) reciprocates, i.e., the up-and-down direction in FIG. 5. Among the "axial directions," the direction from the piston (70) toward the compression space (P) of the cylinder (60), i.e., the direction in which the refrigerant flows, is defined as "forward," and the opposite direction is defined as "rear." When the piston (70) moves forward, the compression space (P) is reduced, and when it moves rearward, the compression space (P) can be expanded.

[0112] On the other hand, "radial direction" is a direction perpendicular to the direction in which the piston (70) reciprocates, and can be understood as the horizontal direction of FIG. 5.

[0113] The above frame (50) may include a frame ledge (53) formed in the boundary area between the frame body (51) and the frame flange (52). The frame ledge (53) may include a support surface facing forward so as to support the rear end of the cylinder flange (62). The frame ledge (53) may extend in a circumferential direction to have a ring shape.

[0114] A cylinder sealing member (82) may be provided between the frame (50) and the cylinder (60). By means of the cylinder sealing member (82), the adhesion force may be increased during the press-fitting process between the frame (50) and the cylinder (60).

[0115] The cylinder sealing member (82) has a ring shape and can be installed on the inner surface of the frame (50) where the cylinder flange (62) of the cylinder (60) is seated, that is, on the frame jaw (53).

[0116] The above frame (50) may have a bearing channel (58) formed therein that extends axially from the frame flange (52) toward the frame body (51). A refrigerant acting as a gas bearing among the compressed discharge gas may flow through the bearing channel (58).

[0117] The refrigerant acting as the gas bearing is supplied between the cylinder body (61) and the piston (70) of the cylinder (60) to cause the piston (70) to float inside the cylinder (60).

[0118] The above-mentioned frame flange (52) may include fastening holes (55, 56) into which a predetermined fastening member is coupled for fastening the frame (50) and surrounding parts. A plurality of the fastening holes (55, 56) may each be arranged in the outer circumference of the frame flange (52).

[0119] The above fastening holes (55, 56) may include a first fastening hole (55) to which a predetermined fastening member is coupled for fastening the third discharge cover (300) and the frame (50). A plurality of the first fastening holes (55) may be spaced apart in the circumferential direction. For example, three first fastening holes (55) may be formed.

[0120] The above fastening holes (55, 56) may include a second fastening hole (56) to which a fastening member for fastening the frame (50) and the stator cover (32) is coupled. A plurality of the second fastening holes (56) may be spaced apart in the circumferential direction. For example, three of the second fastening holes (56) may be formed.

[0121] Since the plurality of first and second fastening holes (55, 56) are evenly arranged in the circumferential direction of the frame flange (52), the frame (50) is supported at three points by surrounding parts, namely the stator cover (32) and the third discharge cover (300), and can be stably joined.

[0122] The above frame flange (52) may include a terminal insertion part (57) that provides an extraction path for the terminal portion of the motor assembly (41, 43, 45). The terminal insertion part (57) is formed such that at least a portion of the frame flange (52) is cut in the front-rear direction, and a plurality of them may be provided and arranged in the circumferential direction.

[0123] The above cylinder (60) may include a cylinder body (61) extending in the axial direction and a cylinder flange (62) provided on the outer front side of the cylinder body (61).

[0124] The above cylinder body (61) has a cylindrical shape defined with respect to an axial central axis so that a piston (70) can be inserted, and can be inserted into the interior of the above frame body (51).

[0125] The cylinder flange (62) may be configured to extend in a circumferential direction to have a ring shape. The cylinder flange (62) may include a stepped projection to support surrounding parts.

[0126] In detail, the cylinder flange (62) may include a first flange (63) that supports the discharge valve assembly (400). The first flange (63) may include a first support surface facing forward to support the rear end of the discharge valve assembly (400). For example, the first flange (63) may have a ring shape extending in the circumferential direction.

[0127] The cylinder flange (62) may include a second flange (64) that supports the sealing bracket (85). The second flange (64) may include a second support surface facing forward to support the rear end of the sealing bracket (85). For example, the second flange (64) may have a ring shape extending in the circumferential direction.

[0128] The second jaw (64) may be located behind the first jaw (63).

[0129] The outer diameter of the second jaw (64) can be formed to be larger than the outer diameter of the first jaw (63).

[0130] The above linear compressor (10) includes a piston (70) that moves in a reciprocating linear motion inside the cylinder (60). The piston (70) can move in an axial direction.

[0131] The above linear compressor (10) may further include a suction muffler (25) coupled to the piston (70) to reduce noise generated from the refrigerant sucked in through the suction pipe (14).

[0132] The refrigerant sucked in through the suction pipe (14) flows into the interior of the piston (70) via the suction muffler (25). For example, as the refrigerant passes through the suction muffler (25), the flow noise of the refrigerant can be reduced. The suction muffler (25) may be composed of a plurality of mufflers combined.

[0133] The above linear compressor (10) may include a motor assembly (41, 43, 45) as a linear motor that provides driving force to the piston (70).

[0134] The motor assembly may include an outer stator (41) fixed to the frame (50) and arranged to surround the cylinder (60), an inner stator (43) spaced apart from the inner side of the outer stator (41), and a permanent magnet (45) located in the space between the outer stator (41) and the inner stator (43).

[0135] A stator cover (32) is provided on one side of the outer stator (41). That is, one side of the outer stator (41) is supported by the frame (50), and the other side can be supported by the stator cover (32).

[0136] The permanent magnet (45) can move in a linear reciprocating motion due to the mutual electromagnetic force with the outer stator (41) and the inner stator (43). The permanent magnet (45) may be composed of a single magnet having one pole or may be composed of a plurality of magnets having three poles combined.

[0137] The above permanent magnet (45) can be installed in a magnet frame (46). The magnet frame (46) has a roughly cylindrical shape and can be positioned to be inserted into the space between the outer stator (41) and the inner stator (43).

[0138] The magnet frame (46) is coupled to the piston (70), and when the permanent magnet (45) reciprocates, the piston (70) can reciprocate in the axial direction together with the permanent magnet (45).

[0139] The above linear compressor (10) may further include a supporter (33) that supports the piston (70). The supporter (33) is coupled to the rear side of the piston (70), and the muffler (25) may be positioned to pass through the inside thereof. The piston (70), the magnet frame (46), and the supporter (33) may be connected by a fastening member.

[0140] The linear compressor (10) may further include a rear cover (31) that is coupled to the stator cover (32), extends rearward, and is supported by a first support device (20). The rear cover (31) may be spring-supported by the supporter (33).

[0141] The rear cover (31) may include a plurality of support legs that are coupled to the rear of the stator cover (32).

[0142] The above linear compressor (10) further includes an inlet guide part (23) that is coupled to the rear cover (31) and guides the inflow of refrigerant into the intake muffler (25).

[0143] The above linear compressor (10) may further include a plurality of resonant springs (30) each having an adjusted natural frequency so that the piston (70) can resonate.

[0144] The plurality of resonant springs (30) may include a plurality of first resonant springs supported between the supporter (33) and the stator cover (32) and a plurality of second resonant springs supported between the supporter (33) and the rear cover (31). Through the action of the plurality of resonant springs (30), stable movement of the drive unit reciprocating inside the linear compressor (10) is performed, and vibration or noise generation due to the movement of the drive unit can be reduced.

[0145] A compression space (P) in which refrigerant is compressed by the piston (70) may be formed inside the cylinder (60). An intake port (71a) for introducing refrigerant into the compression space (P) is formed on the front portion (71) of the piston (70), and an intake valve (75) for selectively opening the intake port (71a) may be provided in front of the intake port (71a).

[0146] The above suction port (71a) may be provided in multiple numbers. The multiple suction ports (71a) are spaced apart in the circumferential direction of the piston (70), and the refrigerant flowing inside the piston (70) is introduced into the compression space (P) through the multiple suction ports (71a).

[0147] The suction valve (75) may be coupled to the front of the piston (70) by a fastening member (78), such as a screw or bolt. The piston (70) may include a fastening hole (71b) into which the fastening member (78) is inserted. For example, the fastening hole (71b) may be formed approximately in the center of the piston (70).

[0148] In front of the compression space (P), a discharge cover assembly (100, 200, 300) forming a discharge space for the refrigerant discharged from the compression space (P) may be provided. The discharge cover assembly (100, 200, 300) may be positioned in front of the frame (50).

[0149] The above discharge cover assembly may include a first discharge cover (100) and a second discharge cover (200) supported on the front of the frame (50). The first discharge cover (100) may be positioned inside the second discharge cover (200).

[0150] For example, the first discharge cover (100) can be press-fitted and fixed to the second discharge cover (200). The cover flange (150) of the first discharge cover (100) can be press-fitted into the inner surface of the cover flange (250) of the second discharge cover (200).

[0151] For convenience of explanation, the above cover flange (150) may be named "first cover flange" and the above second discharge cover (250) may be named "second cover flange".

[0152] In detail, the cover flange (150) of the first discharge cover (100) can be pressed into the inner circumferential portion (253, see FIG. 15) and the jaw (255, see FIG. 15) of the cover flange (250) of the second discharge cover (200).

[0153] The first discharge cover (100) is pressed into the second discharge cover (200), thereby enabling a secure fixation of the first and second discharge covers (100, 200).

[0154] The internal space of the first discharge cover (100) and the internal space of the second discharge cover (200) can form a discharge path (also referred to as a "discharge room") for the refrigerant discharged from the compression space (P). For example, the refrigerant discharged from the compression space (P) can flow through the internal space of the first discharge cover (100), be discharged from the first discharge cover (100), and flow into the internal space of the second discharge cover (200).

[0155] The refrigerant flowing through the discharge chamber of the first discharge cover (100) and the discharge chamber of the second discharge cover (200) may be in a high-temperature gaseous state. The high-temperature heat may be transferred to the frame (50) supporting the first and second discharge covers (100, 200).

[0156] If high-temperature heat is excessively transferred to the frame (50), the transferred heat becomes a factor that raises the temperature (suction temperature) of the refrigerant sucked into the compression space (P) of the cylinder.

[0157] If the above suction temperature increases, the volume of refrigerant per unit mass, that is, the specific volume of the refrigerant, increases, causing a decrease in volumetric efficiency, and consequently, a problem may arise in which the compression efficiency of the compressor decreases.

[0158] To prevent such problems, the first discharge cover (100) and the second discharge cover (200) according to an embodiment of the present invention may be composed of a material having a low heat transfer coefficient. The material having a low heat transfer coefficient may be a non-metallic material.

[0159] The first discharge cover (100) and the second discharge cover (200) may include plastic.

[0160] The first discharge cover (100) and the second discharge cover (200) may be made of the same plastic material, for example, polyamide (PA66) as a type of heat-resistant engineering plastic.

[0161] By making the first discharge cover (100) of the above-mentioned first discharge cover (100) of a plastic material, the amount of high-temperature heat within the first discharge cover (100) that is directly transferred to the frame (50) supporting the first discharge cover (100) or transferred to the second discharge cover (200) that is press-fitted to the first discharge cover (100) can be reduced.

[0162] By making the second discharge cover (200) of the above-mentioned second discharge cover (200) of a plastic material, the amount of high-temperature heat within the second discharge cover (200) that is directly transferred to the frame (50) supporting the second discharge cover (200) or transferred to the first discharge cover (100) that is press-fitted to the second discharge cover (200) can be reduced.

[0163] Ultimately, it is possible to prevent excessive transfer of high-temperature heat from the refrigerant present in the discharge chamber within the first and second discharge covers (100, 200) to the frame (50). Accordingly, the suction temperature of the refrigerant can be reduced and the compression efficiency of the compressor can be improved.

[0164] Since the first and second discharge covers (100, 200) are made of a relatively lightweight plastic material, there is a possibility that vibration and noise may occur in the first and second discharge covers (100, 200) due to the high-pressure refrigerant discharged from the compression space (P).

[0165] To prevent such problems, the discharge cover assembly according to the present embodiment may include a damping member (180) for reducing vibration of the first and second covers (100, 200).

[0166] The damping member (180) may be composed of a deformable material. For example, the damping member (180) may be composed of a rubber material. The damping member (180) may be composed of a rubber material having heat resistance capable of withstanding the high temperature of the discharged gas.

[0167] The damping member (180) is mounted in the recess (140, see FIG. 11) of the first discharge cover (100), and the inner wall (238, see FIG. 15) of the second discharge cover (200) may be configured to support or press the damping member (180). For example, the inner wall (238) may be coupled to the damping member (180) in a direction in which the damping member (180) is inserted into the recess (140).

[0168] The damping member (180) can offset the magnitude of vibration and noise transmitted from one of the first and second discharge covers (100, 200) to the other. In particular, when the discharge valve (410) is turned on and off, the effect of reducing the magnitude of the valve tapping sound that is frictionally applied to the cylinder (60) can be expected.

[0169] In a structure in which the damping member (180) is mounted on the recess (140) of the first discharge cover (100), the recess (140) and the damping member (180) form a flow path through which refrigerant flows, and the flow path can be understood as defining a pulsation path to reduce pulsation that occurs when high-pressure discharge gas flows.

[0170] In other words, the internal space of the above-mentioned recess (140) may include a first area where the damping member (180) is installed and a second area forming a flow path through which the discharge gas flows.

[0171] The above discharge cover assembly may include a third discharge cover (300) that supports the second discharge cover (200).

[0172] The third discharge cover (300) may have a roughly ring shape and be positioned to surround the rear portion of the second discharge cover (200). The third discharge cover (300) may support the cover flange (250) of the second discharge cover (200).

[0173] The third discharge cover (300) can be supported on the front of the frame (50).

[0174] The third discharge cover (300) is fastened to the frame flange (52) by a fastening member (not shown), and the front surface of the frame flange (52) can come into surface contact with the rear surface of the third discharge cover (300).

[0175] A cover fastening hole (335) may be formed in the third discharge cover (300) at a position corresponding to the frame fastening hole (55). The fastening member may be fastened to the first fastening hole (55) of the frame (50) and the cover fastening hole (335) to fix the frame (50) and the third discharge cover (300).

[0176] The third discharge cover (300) may be made of a material different from the first discharge cover (100) and the second discharge cover (200). The third discharge cover (300) may be made of a material having greater strength than the first discharge cover (100) and the second discharge cover (200).

[0177] The third discharge cover (300) may be made of a metal material, for example, aluminum. Since the third discharge cover (300) is connected to the frame (50) by the fastening member, a failure in connection may occur if the amount of deformation increases due to high heat. Therefore, the third discharge cover (300) may be made of a metal material so that the amount of thermal deformation is not large.

[0178] A frame sealing member (81) capable of increasing bonding strength and preventing leakage of refrigerant may be provided at the portion where the second discharge cover (200) and the frame (50) are in surface contact.

[0179] The above-mentioned frame sealing member (81) has a ring shape and can be installed between the rear surface of the second discharge cover (200) and the front surface of the frame (50). For example, the above-mentioned frame sealing member (81) can be installed between the front surface of the frame flange (52) and the cover flange (250) of the second discharge cover (200).

[0180] The linear compressor (10) may include a discharge valve assembly (400). The discharge valve assembly (400) may include a discharge valve (410) and a spring assembly (420) that provides elastic force to the discharge valve (410) in a direction that brings it into close contact with the front end of the cylinder (60). The spring assembly (420) may be named a "valve support device" in that it supports the discharge valve (410).

[0181] The above spring assembly (420) may include a valve spring (430) composed of a leaf spring and a spring bracket (450) that surrounds the edge of the valve spring (430) to support the valve spring (430).

[0182] The discharge valve (410) is coupled to the central part of the valve spring (430). When the discharge valve (410) is opened, the refrigerant compressed in the compression space (P) of the cylinder (60) is discharged and flows into the internal space of the first discharge cover (100). At this time, the valve spring (430) can be deformed in a direction that opens the discharge valve (410).

[0183] When the discharge of the refrigerant is completed, the discharge valve (450) can be closed by the restoring force of the valve spring (430).

[0184] The rim portion of the spring bracket (450) can be seated on the inner surface of the first discharge cover (100). The rear end of the spring bracket (450) can be seated on the first flange (63) of the cylinder flange (62).

[0185] A sealing bracket (85) may be installed around the front end of the cylinder (60). For example, the sealing bracket (85) may have a ring shape or a hollow cylindrical shape and may be positioned to surround at least a portion of the cylinder flange (62).

[0186] The sealing bracket (85) is seated on the second flange (64) of the cylinder flange (62) and can be supported on the rear surface of the spring bracket (450). For example, the sealing bracket (85) can be supported on the projection (480, see FIG. 6) of the spring bracket (450).

[0187] A bracket sealing member (83) may be provided between the sealing bracket (85) and the second flange (64) of the cylinder flange (62). The bracket sealing member (83) is provided on the contact surface between the sealing bracket (85) and the cylinder flange (62) and can prevent refrigerant from leaking through the space between the cylinder (60) and the spring assembly (420). The bracket sealing member (83) may have a ring shape.

[0188] In this embodiment, the sealing bracket (85) is described as being provided as a separate part and assembled to the cylinder flange (62); however, alternatively, the sealing bracket may be integrated into the cylinder flange and form a part of the cylinder flange. That is, in a broad sense, the sealing bracket (85) may form a part of the cylinder (60).

[0189] FIG. 6 is a front exploded perspective view showing the configuration of a discharge valve assembly according to an embodiment of the present invention, FIG. 7 is a rear exploded perspective view showing the configuration of a discharge valve assembly according to an embodiment of the present invention, FIG. 8 is a bottom view showing the configuration of a valve support device according to an embodiment of the present invention, FIG. 9 is a cross-sectional view taken along 9-9 of FIG. 6, and FIG. 10 is a cross-sectional view taken along 10-10 of FIG. 6.

[0190] Referring to FIGS. 6 to 10, a discharge valve assembly (410) according to an embodiment of the present invention may include a discharge valve (410) that selectively opens and closes the compression space (P) of the cylinder (60).

[0191] Here, the compression space (P) is understood as a space formed between the intake valve (75) and the discharge valve (410). The intake valve (75) may be formed on one side of the compression space (P), and the discharge valve (410) may be provided on the other side of the compression space (P), that is, on the opposite side of the intake valve (76).

[0192] The above discharge valve (410) can be opened when the pressure of the compression space (P) exceeds the discharge pressure, thereby allowing the refrigerant to flow into the discharge chamber of the first discharge cover (100).

[0193] The discharge valve (410) may include a valve body (411) that selectively contacts the cylinder (60). The valve body (411) may, for example, have the shape of a disc. The valve body (411) may include a rear portion (412) that contacts the front end of the cylinder (60).

[0194] The valve body (411) may include an avoidance groove (413) that is recessed forward from the rear portion (412). The avoidance groove (413) is understood as an "interference prevention groove" that prevents at least a portion of the piston (70) from interfering with the discharge valve (410) during the process in which the piston (70) moves forward to compress the refrigerant. Here, at least a portion of the piston (70) may include a fastening member (78) for fastening the suction valve (75) to the piston (70).

[0195] The discharge valve (410) may include a spring coupling portion that protrudes forward from the valve body (411) and is coupled to the valve spring (430). The spring coupling portion may include an insertion projection (415) that protrudes forward from the center of the valve body (411).

[0196] The insertion projection (415) may be coupled to a projection coupling portion (435) provided on the valve spring (430). The projection coupling portion (435) may include an insertion hole (437) into which the insertion projection (415) is inserted.

[0197] The cross-sectional shapes of the insertion projection (415) and the insertion hole (437) have corresponding shapes, for example, they may have a non-circular shape. Accordingly, when the discharge valve (410) performs an opening and closing action while the insertion projection (415) is inserted into the insertion hole (437), the phenomenon of the discharge valve (410) rotating on its own can be prevented.

[0198] Ultimately, the effect is that the discharge valve (410) can be prevented from behaving unstably and the wear of the discharge valve (410) caused by the unstably behaving unstably can be reduced.

[0199] The insertion projection (415) may include the groove (417). The groove (417) may be configured to be recessed from the front to the rear of the insertion projection (415).

[0200] The above-mentioned groove (417) is understood to realize a weight reduction structure of the discharge valve (410), and the weight reduction structure can reduce the weight of the discharge valve (410) and improve the responsiveness of the discharge valve (410).

[0201] The insertion projection (415) may include a plurality of outer portions (415a) extending in a circumferential direction with a curvature set with respect to the center of the insertion projection (415). The plurality of outer portions (415a) are spaced apart from each other in a circumferential direction and may have an arc shape with respect to the center of the insertion projection (415). For example, the plurality of outer portions (415a) may include three outer portions.

[0202] The insertion projection (415) may include a plurality of projection jaws (416a, 416b, 416c) that connect the plurality of outer portions (415a) to each other. The plurality of projection jaws (416a, 416b, 416c) may be arranged in a circumferential direction with respect to the center of the insertion projection (415).

[0203] The plurality of protrusions (416a, 416b, 416c) may be configured to have a shape or curvature different from that of the plurality of outer periphery portions (415a). For example, the plurality of protrusions (416a, 416b, 416c) may have a shape that is recessed from both ends of the outer periphery portion (415a) in a direction approaching the center of the insertion protrusion (415).

[0204] The above plurality of protruding jaws (416a, 416b, 416c) may include a first protruding jaw (416a), a second protruding jaw (416b), and a third protruding jaw (416c).

[0205] By configuring the outer surface of the insertion projection (415) including the plurality of outer periphery portions (415a) and the plurality of projection jaws (416a, 416b, 416c), the insertion projection (415) may have a non-circular shape.

[0206] The valve spring (430) is coupled to the front of the discharge valve (410) to enable elastic movement of the discharge valve (410). The valve spring (430) includes a plate spring and, for example, may have the shape of a roughly disc.

[0207] The valve spring (430) may include a projection coupling portion (435) that forms an insertion hole (437) for coupling with the insertion projection (415) of the discharge valve (410). The projection coupling portion (435) may be formed approximately in the center of the valve spring (430).

[0208] The above-mentioned protrusion coupling portion (435) may include a plurality of fitting portions (435a) that extend in a circumferential direction with respect to the center of the insertion hole (437) corresponding to a plurality of outer portions (415a) of the discharge valve (410). The plurality of fitting portions (435a) are spaced apart from each other in a circumferential direction and may have an arc shape with respect to the center of the insertion hole (437). For example, the plurality of fitting portions (435a) may include three outer portions.

[0209] The above-mentioned projection coupling portion (435) may include a plurality of jaw support portions (436a, 436b, 436c) that connect the plurality of fitting portions (435a) to each other and have shapes corresponding to the plurality of projection jaws (416a, 416b, 416c). The plurality of jaw support portions (436a, 436b, 436c) may be arranged in a circumferential direction with respect to the center of the insertion hole (437).

[0210] The plurality of jaw support portions (436a, 436b, 436c) may be configured to have a shape or curvature different from that of the plurality of fitting portions (435a). For example, the plurality of jaw support portions (436a, 436b, 436c) may have a shape that is recessed at both ends of the fitting portion (435a) in a direction approaching the center of the insertion hole (435).

[0211] The above plurality of jaw support members (436a, 436b, 436c) may include a first jaw support member (436a), a second jaw support member (436b), and a third jaw support member (436c).

[0212] By configuring the inner surface of the projection coupling part (435) including the plurality of fitting parts (435a) and the plurality of jaw support parts (436a, 436b, 436c), the projection coupling part (435) may have a non-circular shape.

[0213] The valve spring (430) may include a plurality of spring extensions (438a, 438b, 438c) that extend in a swirl or spiral shape at a plurality of points of the projection coupling portion (435).

[0214] The plurality of spring extension parts (438a, 438b, 438c) may include a first spring extension part (438a) extending from a first point of the projection coupling part (435). The first point may be a point connecting the first fitting part and the first jaw support part (436a) among the plurality of fitting parts (435a).

[0215] The plurality of spring extension parts (438a, 438b, 438c) may include a second spring extension part (438b) extending from a second point of the projection coupling part (435). The second point may be a point connecting the second fitting part and the second jaw support part (436b) among the plurality of fitting parts (435a).

[0216] The plurality of spring extension parts (438a, 438b, 438c) may include a third spring extension part (438c) extending from a third point of the projection coupling part (435). The third point may be a point connecting the third fitting part and the third jaw support part (436c) among the plurality of fitting parts (435a).

[0217] The plurality of spring extensions (438a, 438b, 438c) extend from the projection coupling portion (435) in the direction of the outer circumference of the valve spring (430) and can be coupled to the spring bracket (450). For example, the plurality of spring extensions (438a, 438b, 438c) can be coupled to the inner circumference of the spring bracket (450).

[0218] A space (439) may be formed between the plurality of spring extension parts (438a, 438b, 438c). The refrigerant discharged from the discharge valve (410) through the space (439) may flow to the discharge outlet of the first discharge cover (100).

[0219] The spring bracket (450) can be injection molded onto the valve spring (430). That is, the spring bracket (450) can be injection molded onto the valve spring (430) in one step without the need to provide multiple parts to support the valve spring (430), thereby reducing material costs and simplifying the assembly process of the spring assembly (420).

[0220] The spring bracket (450) may be made of a deformable material so as to be in close contact with the first discharge cover (100), the cylinder (60), and the sealing bracket (85) during the installation process of the valve assembly (420).

[0221] The spring bracket (450) is press-fitted and fixed to the first discharge cover (100), the cylinder (60), and the sealing bracket (85) to reduce vibration and noise generated from the discharge valve (410).

[0222] The spring bracket (450) may be made of a rubber material. For example, the spring bracket (450) may be made of a fluororubber (FKM) material.

[0223] The spring bracket (450) may be configured to support the rim portion of the valve spring (430). The spring bracket (450) may include a first wall (460) that forms the outer surface of the spring bracket (450) and is pressed into the first discharge cover (100).

[0224] The spring bracket (450) may include a second wall (470) that forms the inner surface of the spring bracket (450) and is pressed into the cylinder (60). The plurality of spring extensions (438a, 438b, 438c) may be inserted and fixed into the second wall (470).

[0225] The first wall (460) may be configured to surround the second wall (470) at the front portion of the second wall (470). Accordingly, the outer diameter of the first wall (460) may be formed to be larger than the outer diameter of the second wall (470). The spring bracket (450) may include a stepped portion equal to the difference between the outer diameter of the first wall (460) and the outer diameter of the second wall (470).

[0226] The axial length of the second wall (470) can be formed to be longer than the axial length of the first wall (460).

[0227] The first wall (460) may include an outer surface portion (461) that forms a part of the outer surface of the spring bracket (450). The outer surface portion (461) includes a surface that extends in the circumferential direction of the spring bracket (450) and may form the largest outer diameter of the spring bracket (450).

[0228] The first wall (460) may include a stepped portion (462) forming the rear end of the first wall (460). The stepped portion (462) may form a step corresponding to the difference between the outer diameter of the first wall (460) and the outer diameter of the second wall (470).

[0229] A projection (480) may be provided on the stepped portion of the spring bracket (450). That is, the projection (480) may be provided on the outer surface of the second wall (470) and may be connected to the stepped portion (462) of the first wall (460). For example, the projection (480) may extend rearward from the stepped portion (462) and be connected to the outer surface of the second wall (470).

[0230] The above protrusions (480) are provided in multiple numbers, and the multiple protrusions (480) may be spaced apart in the circumferential direction with respect to the center of the valve spring (430).

[0231] The above-mentioned protrusion (480) may include a surface that is pressed into the sealing bracket (85). The surface that is pressed into the above-mentioned protrusion (480) constitutes a supporting surface (481) of the above-mentioned protrusion (480), and the supporting surface (481) may form the rear surface of the above-mentioned protrusion (480).

[0232] Between the plurality of protrusions (480), a reduction portion (485) may be formed to provide a deformation space for the spring bracket (450) during the process of pressing the spring bracket (450). Through the reduction portion (485), the spring bracket (450) can be easily pressed into a surrounding structure and the damping force for vibration reduction can be improved.

[0233] For example, a slimming portion (485) is formed between the first protrusion (480a) and the second protrusion (480b), and the slimming portion (485) can be understood as a space between the first and second protrusions (480a, 480b).

[0234] In addition, the weight of the spring bracket (450) is reduced by the above-mentioned weight reduction part (485), and the amount of vibration and noise generated from the discharge valve (410) and cylinder (60) transmitted to surrounding structures through the light spring bracket (450) can be reduced.

[0235] The second wall (470) may include a first inner surface portion (471) to which the valve spring (430) is coupled. The first inner surface portion (471) extends in the circumferential direction of the spring bracket (450) and may include a plurality of spring coupling portions to which the plurality of spring extension portions (438a, 438b, 438c) are coupled.

[0236] For example, the first inner surface portion (471) may include a first coupling portion (471a) to which the first spring extension portion (438a) is coupled, a second coupling portion (471b) to which the second spring extension portion (438b) is coupled, and a third coupling portion (471c) to which the third spring extension portion (438c) is coupled.

[0237] The first coupling part (471a), the second coupling part (471b), and the third coupling part (471c) may be spaced apart from each other in the circumferential direction of the first inner circumferential part (471).

[0238] The second wall (470) may include a second inner surface portion (472) that forms an internal space in which at least a portion of the discharge valve (410) is located. The second inner surface portion (472) may extend in the circumferential direction of the spring bracket (450).

[0239] The axial length (front-back direction) of the second inner surface portion (472) may be greater than the axial length (front-back direction) of the first inner surface portion (471).

[0240] The inner diameter of the second inner surface portion (472) may be larger than the inner diameter of the first inner surface portion (471). The second wall (470) may include a stepped portion equal to the difference between the inner diameter of the second inner surface portion (472) and the outer diameter of the first inner surface portion (471).

[0241] In detail, the second wall (470) may include an inner ridge (473) connecting the first inner surface portion (471) and the second inner surface portion (472). The inner ridge (473) has a ring shape, and the difference between the inner diameter of the second inner surface portion (472) and the outer diameter of the first inner surface portion (471) may form the radial width of the inner ridge (473).

[0242] The inner jaw (473) can be extended from the rear end of the first inner surface portion (471) and connected to the front end of the second inner surface portion (472).

[0243] The second wall (470) may be supported by the cylinder (60). Specifically, the second wall (470) may include a cylinder support portion (475) that contacts the cylinder (60). For example, the cylinder support portion (475) may be pressed into the first jaw (63) of the cylinder (60).

[0244] The above cylinder support (475) is formed at the rear end of the second wall (470) and can have a ring shape by extending in the circumferential direction.

[0245] The cylinder support member (475) may include a press-fit surface that contacts the first flange (63). As the cylinder support member (475) presses into the first flange (63), the refrigerant flowing through the internal space of the spring bracket (450) may be prevented from leaking to the outside of the cylinder (60).

[0246] The cylinder support member (475) may include a plurality of support members (475a, 475b) that contact the first jaw (63). Each of the plurality of support members (475a, 475b) may include a first support member (475a) and a second support member (475b) that extend in a circumferential direction.

[0247] The first and second support members (475a, 475b) are spaced apart from each other, and the cylinder support member (475) can form a support groove (475c) that is recessed between the first and second support members (475a, 475b). The support groove (475c) may have the shape of a recessed groove in the circumferential direction corresponding to the shape of the first and second support members (475a, 475b).

[0248] The support groove (475c) can improve the press-fit performance by providing a deformation space for the first and second support members (475a, 475b) when the first and second support members (475a, 475b) are pressed into the first jaw (63). As the press-fitting of the first and second support members (475a, 475b) is easy, the damping performance of the spring bracket (450) can be improved.

[0249] Referring to FIGS. 9 and 10, the valve spring (430) can be inserted into the spring bracket (450). For example, at least a portion of the valve spring (430) can be inserted into the second wall (470).

[0250] In order for the spring bracket (450) to perform damping against vibration in response to the opening and closing action of the discharge valve (410) and the deformation of the valve spring (430), the spring bracket (450) may have a thickness set in the axial direction of the valve spring (430).

[0251] The axial thickness of the above valve spring (430) can form a first thickness (t1).

[0252] The thickness of the portion of the spring bracket (450) into which the valve spring (430) is inserted can form a second thickness (t2) and a third thickness (t3).

[0253] In detail, the second thickness (t2) may form the thickness of a portion of the second wall (470) that supports the front end of the valve spring (430). The portion forming the second thickness (t2) may form the first spring support portion (476a). The second thickness (t2) may form a thickness equal to or greater than the first thickness (t1).

[0254] The third thickness (t3) may form the thickness of another part of the second wall (470) that supports the rear end of the valve spring (430). The part forming the third thickness (t3) may form the second spring support part (476b). The third thickness (t3) may form a thickness equal to or greater than the first thickness (t1).

[0255] For example, the second thickness (t2) and the third thickness (t3) may be substantially the same.

[0256] In this way, the thickness (t2, t3) of the first and second spring support parts (476a, 476b) is formed to be greater than or equal to the thickness (t1) of the valve spring (430), thereby allowing the damping performance of the spring bracket (450) to be maintained well even in a high-temperature environment where the discharge gas flows.

[0257] FIG. 11 is a perspective view showing a damping member installed on a first discharge cover according to an embodiment of the present invention, FIG. 12 is a lower perspective view of the first discharge cover according to an embodiment of the present invention, and FIG. 13 is an upper perspective view of the damping member according to an embodiment of the present invention.

[0258] Referring to FIGS. 11 to 13, a first discharge cover (100) according to an embodiment of the present invention may include a cover body (110) forming a discharge chamber and a cover flange (150) provided at the rear end of the cover body (110) and supported by the frame (50).

[0259] The above cover body (110) may be configured to have a cap shape to form a discharge chamber for the refrigerant discharged from the discharge valve (410).

[0260] The above cover body (110) may include a cylindrical outer wall (111). The outer wall (111) may include a first part (111a) forming a front portion and a second part (111b) connected to the cover flange (150). The first and second parts (111a, 111b) may be arranged in an axial direction.

[0261] The first part (111a) and the second part (111b) may be extended in a rounded manner in the circumferential direction to have a cylindrical shape.

[0262] The outer wall of the cover body (110) may be formed with a step. Specifically, the outer wall of the cover body (110) may include a step portion (111c) connecting the first part (111a) and the second part (111b).

[0263] The stepped portion (111c) may be connected to the second part (111b) by extending radially outward from the end of the first part (111a). Due to the stepped portion (111c), the outer diameter of the second part (111b) may be formed to be larger than the outer diameter of the first part (111a).

[0264] The above step portion (111c) may be configured to correspond to the rear end of the recess (140) of the first discharge cover (100), that is, the position where the bottom surface (140a, see FIG. 19) is formed. That is, the recess (140) is not formed in the second part (111b), and the first part (111a) may be formed thicker than the second part (111b) so that it is not deformed or damaged during the press-fitting process with the second discharge cover (200).

[0265] The first discharge cover (100) may include a front wall (120) forming the front of the first discharge cover (100). The front wall (120) may be positioned radially inward of the outer wall. For convenience of explanation, the front wall (120), the outer wall (111), and the inner wall (130) may be named the first to third walls in order.

[0266] The above front wall (120) can form a discharge hole (123) that transmits the discharge gas present in the internal space of the first discharge cover (100), i.e., the discharge chamber, to the outside of the first discharge cover (100).

[0267] The first discharge cover (100) may include a discharge guide (126) that protrudes from the front wall (120) in a direction toward the discharge valve (410). The discharge guide (126) may form the discharge hole (123). That is, the discharge hole (123) may be formed by penetrating from the discharge guide (126) to the front wall (120).

[0268] The first discharge cover (100) may include an inner wall (130) extending toward the rear from the edge of the front wall (120). The inner wall (130) may be extended in a rounded manner in the circumferential direction to have a cylindrical shape.

[0269] The front wall (120), the inner wall (130), and the discharge guide (126) can define a discharge chamber within the first discharge cover (100).

[0270] A recess (140) may be formed between the outer walls (111a, 111b, 111c) and the inner wall (130). The recess (140) is formed to have a ring shape along the perimeter of the inner wall (130) and may be configured to be recessed from the front end of the first discharge cover (100) toward the rear. The bottom surface (140a) of the recess (140) may be formed at a height corresponding to the stepped portion (111c) of the outer wall.

[0271] The above-mentioned recess (140) may be formed along the circumference of the discharge hole (123) formed in the center of the first discharge cover (100). Specifically, the discharge hole (123) may be formed in the center of the front wall (120), and the recess (140) may be formed along the outer circumference of the front wall (120).

[0272] The radial width of the above-mentioned recess (140) is understood as the distance between the inner wall (130) and the first part (111a), and can be formed smaller than the width of the discharge chamber (A1, see FIG. 19) of the first discharge cover (100) and the width of the discharge chambers (A2, A3) of the second discharge cover (200).

[0273] The above-mentioned depression (140) can form a flow path for the discharged gas. The discharged gas exhibits a pulsation phenomenon in which the pressure or flow rate changes periodically, and noise may be generated by the pulsation.

[0274] In this embodiment, the flow path of the discharged gas can be formed roundly through the ring-shaped recess (140) and the length of the flow path can be formed long to reduce pulsation.

[0275] Additionally, the recess (140) is formed between the first discharge chamber (A2, see FIG. 19) and the second discharge chamber (A3, see FIG. 19) of the second discharge cover (200) based on the refrigerant flow, and the cross-sectional area of ​​the recess (140) may be formed to be smaller than the cross-sectional area of ​​the first discharge chamber (A2) and the cross-sectional area of ​​the second discharge chamber (A3).

[0276] Accordingly, as the discharge gas flows from the first discharge chamber (A2), which has a relatively large cross-sectional area, to the recess (140), which has a small cross-sectional area, and then to the second discharge chamber (A3), which has a large cross-sectional area, the pulsating noise can be reduced.

[0277] The linear compressor (10) further includes a loop pipe (290, see FIG. 14) as a configuration for reducing pulsation. The loop pipe (290) is a pulsation pipe extending from the discharge cover assembly to the discharge pipe of the shell (11) and may be made of a flexible material to reduce pulsation noise.

[0278] The recess (140) of the first discharge cover (100) can be understood to form an additional pulsating pipe in addition to the loop pipe (290), and to form a pulsating flow path inside the recess (140).

[0279] A damping member (180) may be installed in the first discharge cover (100). The damping member (180) is inserted into the recess (140) and can cover the open front portion of the recess (140).

[0280] With the damping member (180) inserted into the recess (140), the rear end of the damping member (180) may be spaced apart from the rear end of the recess (140), i.e., the bottom surface (140a). The space between the rear end of the recess (140) and the rear end of the damping member (180) may form a pulsating flow path through which discharge gas flows.

[0281] The refrigerant discharged to the outside of the first discharge cover (100) through the discharge hole (123) can flow into the flow path within the recess (140). The first discharge cover (100) may include a configuration for guiding the refrigerant to flow into the interior of the recess (140).

[0282] In detail, the first discharge cover (100) may include a recess (125) that is recessed radially inward from the inner wall (130), that is, in a direction approaching the discharge hole (123). The recess (125) may be formed from the front wall (120) to the bottom surface (140a) of the recess (140).

[0283] As the above recess (125) is formed radially inward, the radial width of the area of ​​the recess (140) where the recess (125) is formed among the ring-shaped recess (140) may be larger than the radial width of other areas.

[0284] The discharge gas discharged from the discharge hole (123) flows into the recess (125) through the recess (125) and can flow circumferentially at the rear of the damping member (180). The recess (125) can be understood as the inlet of a pulsating flow path formed within the recess (140).

[0285] The first discharge cover (100) may include a configuration for guiding the discharge of refrigerant within the recess (140) to the outside. Specifically, the first discharge cover (100) may include a protrusion (113) that protrudes radially outward from the outer wall, that is, in a direction away from the discharge hole (123).

[0286] The back surface of the above protrusion (113) can be understood as forming a recess (113a) that is recessed from the inner circumference of the outer wall. The recess (113a) may be formed from the front end of the recess (140) to the bottom surface (140a) of the recess (140). The recess (125) may be named "first recess" and the recess (113a) may be named "second recess".

[0287] As the above protrusion (113) is formed radially outward, the radial width of the area of ​​the recess (140) in which the recess (113a) is formed among the ring-shaped recess (140) may be larger than the radial width of other areas.

[0288] The discharge gas flowing through the pulsating flow path within the recess (140) can be discharged from the recess (140) through the recess (113a). The recess (113a) can be understood as an outlet of the pulsating flow path formed within the recess (140).

[0289] The above recess (113a) can be connected to the second discharge chamber (A3, see FIG. 19) of the second discharge cover (200).

[0290] The center of the first discharge cover (100) may be formed at the center of the discharge hole (123). The first recess (125a) and the second recess (113a) may be formed opposite each other with respect to the center.

[0291] The discharge gas discharged from the discharge hole (123) flows into the recess (140) through the first recess (125) and flows in a clockwise and counterclockwise direction and can be discharged from the recess (140) at the second recess (113a).

[0292] The first recess (125) may be named the "inlet" of the pulsating channel formed in the recess (140) of the first discharge cover (100), and the second recess (113a) may be named the "outlet" of the pulsating channel.

[0293] At least a portion of the second discharge cover (200), for example, an inner wall (238, see FIG. 15), may be coupled to the damping member (180). The inner wall (238) may have a ring shape corresponding to the damping member (180).

[0294] By combining the inner wall (238) and the damping member (180), the internal space of the second discharge cover (200) can be divided into a plurality of discharge chambers (A2, A3, see FIG. 19).

[0295] That is, the refrigerant in the first discharge chamber (A2) of the second discharge cover (200) flows into the recess (140) through the first recess (125), and is discharged from the recess (140) through the second recess (113a) and flows into the second discharge chamber (A3) of the second discharge cover (200).

[0296] The second discharge chamber (A3) of the second discharge cover (200) can be arranged to surround the first discharge chamber (A2) of the second discharge cover (200).

[0297] The first discharge cover (100) may include ribs for reinforcing the strength of the discharge cover made of plastic material. Specifically, the first discharge cover (100) may include an inner surface where reinforcing ribs (135) are installed. The inner surface of the first discharge cover (100) may be understood as a wall surface defining the discharge room.

[0298] The reinforcing rib (135) can be configured to protrude from the inner surface of the first discharge cover (100).

[0299] The reinforcing rib (135) may include a first portion (135a) that is connected to the discharge guide (126) and extends along the rear surface of the front wall (120). The first portion (135a) may extend radially.

[0300] The reinforcing rib (135) may include a second portion (135b) extending along the inner wall (130) from the rear of the front wall (120). The second portion (135b) is connected to the first portion (135a) and may extend axially (rearward).

[0301] By the configuration of the first part (135a) and the second part (135b), the reinforcing rib (135) can be configured to be bent or rounded.

[0302] The above reinforcing ribs (135) are provided in multiple numbers, and the multiple reinforcing ribs (135) may be spaced apart in the circumferential direction. The multiple reinforcing ribs (135) may act as flow resistance bodies for the discharge gas flowing in the internal space of the first discharge cover (100) to reduce the magnitude of the pulsation.

[0303] The first discharge cover (100) may include a connecting rib (136) connecting the outer wall (111a, 111b, 111c) and the inner wall (130). For example, the connecting rib (136) may connect the rear end of the inner wall (130) and the inner surface of the second part (111b).

[0304] The above connecting ribs (136) are provided in multiple numbers, and the multiple connecting ribs (136) may be spaced apart in the circumferential direction. The multiple connecting ribs (136) may be connected to the multiple reinforcing ribs (135). The connecting ribs (136) can be understood as forming at least a portion of the reinforcing ribs (135).

[0305] The above connecting rib (136) may be positioned further back than the bottom surface (140a) of the above recess (140).

[0306] The inner surface of the first discharge cover (100) may have a stepped configuration by means of the outer walls (111a, 111b, 111c), the inner wall (130), and the connecting rib (136).

[0307] In detail, the axial length of the outer wall (111a, 111b, 111c) may be formed to be longer than the axial length of the inner wall (130). Additionally, the connecting rib (136) may extend radially outward from the rear end of the inner wall (130) and be connected to the inner circumference of the outer wall.

[0308] With this configuration, the inner surface of the first discharge cover (100) is configured to be stepped, and the discharge valve assembly (190) can be supported on the stepped inner surface of the first discharge cover (100).

[0309] The front edge of the discharge valve assembly (400) is supported by the connecting rib (136), and the outer surface of the discharge valve assembly (400) can be supported on the inner surface of the outer wall (111a, 111b, 111c). Of course, the size of the discharge valve assembly (400) will be configured to be sized to fit the stepped inner surface of the first discharge cover (100).

[0310] The first discharge cover (100) may include a groove (132) that provides a deformation space of the first discharge cover (100) during the process in which the discharge valve assembly (400) is pressed into the first discharge cover (100). The groove (132) may be formed at the rear end of the inner wall (130). A plurality of the protruding grooves (132) may be formed spaced apart in the circumferential direction of the inner wall (130).

[0311] The cover flange (150) may extend radially outward from the rear end of the cover body (110) to have a radius larger than that of the cover body (110). The cover flange (150) may have a roughly ring shape.

[0312] The rear end of the cover flange (150) may form a support surface (151) that contacts the frame (50). A reduction portion (152) may be formed at the rear end of the cover flange (150). The reduction portion (152) may be formed by indenting at least a part of the cover flange (150).

[0313] The above-mentioned weight loss portions (152) are formed in multiple numbers, and the multiple weight loss portions (152) are formed spaced apart in the circumferential direction, and the supporting surface (151) may be formed between the multiple weight loss portions (152).

[0314] By forming the above-mentioned weight reduction portion (152), the contact area between the first discharge cover (100) and the frame (50) can be reduced, and accordingly, the amount of heat transferred from the first discharge cover (100) to the frame (50) can be reduced.

[0315] The above cover flange (150) may include a recessed bearing groove (155) to guide at least a portion of the discharge gas refrigerant into the bearing channel (58). The bearing groove (155) is recessed from the outer surface of the cover flange (150) so as to be refrigerant-fluidly connected to the bearing channel (58).

[0316] For example, at least some of the refrigerant among the discharge gas present in the internal space of the second discharge cover (200) can flow into the bearing channel (58) through the bearing groove (155).

[0317] Referring to FIG. 13, the damping member (180) may be provided in one of the areas where the first discharge cover (100) and the second discharge cover (200) are combined. In particular, the damping member (180) may be provided in a partition wall that divides the internal space of the second discharge cover (200) into two or more discharge rooms.

[0318] For example, the above partition wall may include an inner wall (238) provided in the second discharge cover (200).

[0319] The damping member (180) may have a ring shape with an empty interior to form a hollow portion (186).

[0320] The damping member (180) may be configured to be inserted into a recess (140) formed in the first discharge cover (180). Specifically, the damping member (180) may include a first part (181) that forms a groove (184) into which the inner wall (238) is inserted.

[0321] The first part (181) may include a ring-shaped inner surface portion (182) and a ring-shaped outer surface portion (183) surrounding the inner surface portion (182).

[0322] The first part (181) may include a groove (184) formed between the inner surface portion (182) and the outer surface portion (183). The groove (184) has a width in the radial direction and may have an inner wall (238) of the second discharge cover (200) inserted into it. For example, the inner wall (238) may be pressed into the groove (184).

[0323] The front end of the above-mentioned groove (184) is open, and the inner surface of the above-mentioned groove (184) can be defined by the inner surface portion (182), the outer surface portion (183), and the bottom surface of the above-mentioned groove (184).

[0324] When the inner wall (238) is joined to the groove (184), the inner surface portion (182) and the outer surface portion (183) may be deformed in a direction that reduces their thickness. That is, the inner wall (238) and the damping member (180) may be press-fitted so that a predetermined press-fit zone is formed.

[0325] The damping member (180) may include a second part (185) that is connected to the rear end of the first part (181) and extends backward.

[0326] The second part (185) extends rearward from approximately the center of the rear end of the first part (181) and may be formed with a step relative to the first part (181). The first part (181) and the second part (185) may have an approximately Y shape.

[0327] The second part (185) can extend into the recess (140) of the first discharge cover (100). The rear end of the second part (185) can form the rear end of the damping member (180).

[0328] The damping member (180) can reduce vibrations occurring between the first discharge cover (100) and the second discharge cover (200).

[0329] In addition, as described above, the damping member (180) can reduce the pulsating noise of the discharged gas by being inserted into the recess (140) of the first discharge cover (100) and defining a part of the pulsating flow path formed in the recess (140).

[0330] FIG. 14 is an upper perspective view of a second discharge cover according to an embodiment of the present invention, and FIG. 15 is a lower perspective view of a second discharge cover according to an embodiment of the present invention.

[0331] Referring to FIGS. 14 and 15, the second discharge cover (200) according to an embodiment of the present invention forms an internal space that accommodates the first discharge cover (100), and the internal space may include a flow path for the refrigerant discharged from the discharge valve (410).

[0332] The second discharge cover (200) may include a cover body (210) that forms a discharge chamber for the refrigerant and a cover flange (250) provided at the rear end of the cover body (210) and supported by the frame (50).

[0333] The above cover body (210) may be configured to have a cap shape to form a discharge chamber for the refrigerant discharged from the discharge valve (410).

[0334] The above cover body (210) may include an outer wall (220, 230). The outer wall may include a first part (220) connected to the cover flange (250). The first part (220) may have a cylindrical shape by extending in a rounded manner in the circumferential direction.

[0335] The above outer wall may include a second part (230) extending forward from the front portion of the first part (220). The second part (230) may extend axially from the first part (220).

[0336] The second part (230) can be formed stepwise from the first part (220).

[0337] The size of the second part (230) may be formed to be smaller than the size of the first part (220). For example, the outer diameter or inner diameter of the second part (230) may be formed to be smaller than the outer diameter or inner diameter of the first part (220).

[0338] The second discharge cover (200) may further include a protrusion (233) extending radially outward from the second part (230). The protrusion (233) is connected to the first part (220) and may extend axially to the cover flange (250).

[0339] The above protrusion (233) may include a discharge hole (280) for discharging refrigerant from the discharge chamber of the second discharge cover (200).

[0340] The discharge hole (280) is formed on the side of the protrusion (233) and may be in communication with the internal space (discharge room) of the second discharge cover (200). The discharge hole (280) may be formed by being recessed from the side of the protrusion (233) and penetrating to the shear wall (228) of the first part (220).

[0341] A loop pipe (290) connected to a discharge pipe provided in the shell (11) of the linear compressor (10) may be connected to the discharge port (280). The refrigerant discharged from the discharge port (280) may flow to the discharge pipe through the loop pipe (290).

[0342] The loop pipe (290) is made of a flexible material and can be formed to be relatively long. The loop pipe (290) is connected to the discharge hole (280) and can extend along the outer surface of the second discharge cover (200).

[0343] The second discharge cover (200) may include a recess (235) that guides the extended position of the loop pipe (290). The recess (235) may be configured, for example, to have a shape that is recessed into the outer surface of the second part (230).

[0344] The above-mentioned loop pipe (290) can perform the function of reducing the pulsation of the discharge gas. That is, the above-mentioned loop pipe (290) can function as a pulsation reduction passage (pulsation pipe) that reduces the pulsation of the discharge gas together with the recessed portion (140) of the above-mentioned first discharge cover (100).

[0345] The above protrusion (233) may include a plurality of grooves (234a, 234b). The plurality of grooves (234a, 234b) may allow for a reduction in the contact area with the frame (50) in order to reduce the amount of heat transferred from the high-temperature discharge gas to the frame (50).

[0346] In addition, the plurality of grooves (234a, 234b) may allow for an increase in the heat dissipation area to increase the amount of heat dissipated from the second discharge cover (200).

[0347] The plurality of grooves (234a, 234b) may include a first groove (234a) that is recessed from the outermost radial surface of the protrusion (233). The first groove (234a) may include a plurality of grooves that are formed axially from the second part (230) to the rear end of the second discharge cover (200) and are aligned in the circumferential direction. By the first groove (234a), the heat dissipation area of ​​the protrusion (233) may be increased.

[0348] The plurality of grooves (234a, 234b) may include a second groove (234b) formed on a contact surface (234c) that contacts the frame (50). The contact surface (234c) forms the rear end of the protrusion (233) and can be supported by the frame (50).

[0349] The second groove portion (234b) may include a plurality of grooves that are recessed forward from the contact surface (234c). The plurality of grooves of the second groove portion (234b) may be aligned in a circumferential direction.

[0350] The second discharge cover (200) may include a third part (240) extending forward from the second part (230). The third part (240) may protrude in a direction extending from the second part (230) toward the second shell cover (13). The third part (240) may be located adjacent to the second shell cover (13).

[0351] The above linear compressor (10) may include a cap member (285, see FIG. 5) to prevent noise that occurs when the second discharge cover (200) and the second shell cover (13) come into contact. The cap member (285) may be made of, for example, rubber material to absorb shock that may occur between the second discharge cover (200) and the second shell cover (13).

[0352] The third part (240) may include a first coupling hole (241) into which the cap member (285) is coupled. A protrusion of the cap member (285) is inserted into the first coupling hole (241), thereby facilitating the coupling of the second discharge cover (200) and the cap member (285). The first coupling hole (241) may, for example, be formed at the front end of the third part (240).

[0353] The third part (240) may include a second coupling hole (242) that is coupled to the second support device (90). The second coupling hole (242) is formed on the outer surface of the third part (240), and at least a portion of the second support device (90) may be coupled to the second coupling hole (242) to support the discharge cover assembly.

[0354] The cover flange (250) forms the rear end of the second discharge cover (200) and may have an outer diameter and an inner diameter larger than that of the discharge body (210). For example, the cover flange (250) may have a ring shape.

[0355] The above cover flange (250) may include a contact surface (251) that contacts the frame (50). The contact surface (251) may form a rear end of the cover flange (250) and extend along the outer circumference of the cover flange (250) to have a ring shape.

[0356] The above cover flange (250) may include an outer surface portion (252) that forms the exterior of the cover flange (250) and defines the outer diameter of the cover flange (250), and an inner surface portion (253) that supports the first discharge cover (100) and defines the inner diameter of the cover flange (250).

[0357] The above cover flange (250) may include a projection (255) extending radially inward from the inner circumferential portion (253). The projection (255) may define a step difference between the cover body (210) and the cover flange (250).

[0358] The inner surface portion (253) and the jaw (255) can support the cover flange (150) of the first discharge cover (100). For example, the first discharge cover (100) is pressed into the inner side of the second discharge cover (200), and the inner surface portion (253) and the jaw (255) can provide a press-fit surface of the first discharge cover (100).

[0359] The second discharge cover (200) may include an inner wall (238) protruding from the inner surface of the outer wall (220, 230). The inner wall (238) may be configured to extend rearward from the rear end of the second part (230).

[0360] The inner wall (238) can extend from the second part (230) toward the recess (140) of the first discharge cover (100).

[0361] The inner wall (238) has a ring shape and may have a size corresponding to the recess (140) so that it can be inserted into the recess (140) of the first discharge cover (100).

[0362] The inner wall (238) can be inserted into the groove (184) of the damping member (180).

[0363] By connecting the inner wall (238) to the first discharge cover (100) through the damping member (180), vibration and noise generated from the second discharge cover (200) and the first discharge cover (100) can be reduced.

[0364] The inner wall (238) can divide the internal discharge space (discharge room) of the second discharge cover (200) into a first discharge room (A2, see FIG. 19) and a second discharge room (A3, see FIG. 19). The first discharge room (A2) forms an inner discharge room of the inner wall (238), and the second discharge room (A3) forms an outer discharge room of the inner wall (238).

[0365] The second discharge chamber (A3) is arranged to surround the first discharge chamber (A2), and the refrigerant of the first discharge chamber (A2) can flow into the recess (140) of the first discharge cover (100) and be discharged into the second discharge chamber (A3). That is, the second discharge chamber (A3) can form a downstream flow path of the first discharge chamber (A2).

[0366] The second discharge cover (200) may include reinforcing ribs (227, 237) to reinforce the strength of the cover made of a non-metallic material. The reinforcing ribs (227, 237) are provided in the discharge chamber of the second discharge cover (200) and act as a flow resistance for the refrigerant, thereby reducing the discharge pulsation of the refrigerant.

[0367] The above reinforcing ribs (227, 237) may include a first reinforcing rib (227) provided on the inner surface of the first part (220). The first reinforcing rib (227) may include a first portion (227a) protruding from the inner circumference of the first part (220). The first portion (227a) may extend in the axial direction.

[0368] The first reinforcing rib (227) may include a second part (227b) that is bent from the first part (227a) and extends radially. The second part (227b) may be placed in an area connecting the first part (220) and the second part (230).

[0369] For example, the first part (220) includes a shear wall (228) that defines a step with respect to the second part (230), and the second part (227b) may be provided on the inner surface of the shear wall (228) of the first part (220).

[0370] The first reinforcing ribs (227) are provided in multiple numbers, and the multiple first reinforcing ribs (227) may be spaced apart from each other in the circumferential direction of the first part (220). By arranging the multiple first reinforcing ribs (227), strength reinforcement in the axial and radial directions of the first part (220) can be achieved.

[0371] In addition, the plurality of first reinforcing ribs (227) can act as flow resistance for the refrigerant flowing through the second discharge chamber (A3, see FIG. 19) to reduce the pulsating noise of the refrigerant.

[0372] The above reinforcing ribs (227, 237) may include a second reinforcing rib (237) provided on the inner surface of the second part (230). The second reinforcing rib (237) may include a first portion (237a) protruding from the inner circumference of the second part (230). The first portion (237a) may extend in the axial direction.

[0373] The second reinforcing rib (237) may include a second part (237b) that is bent from the first part (237a) and extends radially. The second part (237b) may be placed in an area connecting the second part (230) and the third part (240).

[0374] For example, the second part (230) includes a shear wall (236) that defines a step with respect to the third part (240), and the second part (237b) may be provided on the inner surface of the shear wall (236) of the second part (230).

[0375] The above second reinforcing ribs (237) are provided in multiple numbers, and the multiple second reinforcing ribs (237) may be spaced apart from each other in the circumferential direction of the second part (230). By arranging the multiple second reinforcing ribs (237), strength reinforcement in the axial and radial directions of the second part (230) can be achieved.

[0376] In addition, the plurality of second reinforcing ribs (237) can act as flow resistance for the refrigerant flowing through the first discharge chamber (A2, see FIG. 19) to reduce the pulsating noise of the refrigerant.

[0377] The third part (240) may include a weight reduction section (245). The weight reduction section (245) may include a recessed portion that is recessed forward from the rear end of the third part (240). By the weight reduction section (245), the weight of the third part (240) is reduced, and the amount of vibration of the second discharge cover (200) can be reduced.

[0378] FIG. 16 is an upper perspective view of a third discharge cover according to an embodiment of the present invention.

[0379] Referring to FIG. 16, a discharge cover assembly according to an embodiment of the present invention may include a third discharge cover (300) supported on a frame (50). The third discharge cover (300) may support the second discharge cover (200) on the frame (50).

[0380] The third discharge cover (300) may have a ring shape to include a portion that surrounds the outer circumference of the second discharge cover (200).

[0381] The third discharge cover (300) may include a cover body (310) that defines an insertion space (312) into which at least a portion of the second discharge cover (200) is inserted. The cover body (310) may have a roughly ring shape.

[0382] The above cover body (310) may be configured to contact or support the outer surface of the second discharge cover (200). The above cover body (310) may include an inner surface portion (311) that surrounds the cover flange (250) of the second discharge cover (200).

[0383] The inner surface portion (311) extends in the axial direction, and the axial length of the inner surface portion (311) may correspond, for example, to the axial length of the cover flange (250) of the second discharge cover (200).

[0384] The above cover body (310) may include a projection (313) that extends radially inward from the inner circumferential portion (311) to support the front portion of the cover flange (250). The projection (313) may form a supporting surface of the second discharge cover (200) together with the inner circumferential portion (311).

[0385] The above third discharge cover (300) can be fastened to the frame (50) by means of a fastening member, for example, a screw.

[0386] The third discharge cover (300) may include a cover flange (330) extending radially outward from the cover body (310). The cover flange (330) may include a support surface supported by the frame (50).

[0387] The above cover flange (330) may include a fastening hole (335) for fastening with the frame (50). The fastening hole (335) is formed by penetrating the cover flange (330), and the fastening member may be fastened to the frame (50) by penetrating the fastening hole (335).

[0388] The above cover flanges (330) are provided in multiple numbers, and the third discharge cover (300) can be firmly fixed to the frame (50) through the multiple cover flanges (330). For example, the multiple cover flanges (330) may include three cover flanges, but the number of cover flanges (330) is not limited thereto.

[0389] The third discharge cover (300) may include a protrusion support member (340) that supports a protrusion (233) of the second discharge cover (200). The protrusion support member (340) may be configured to protrude radially outward from the cover body (310) to accommodate at least a portion of the protrusion (233).

[0390] The above third discharge cover (300) may include a terminal cover portion (351) that covers a terminal portion (not shown). The terminal portion is provided on the outer stator (41) and can be understood as a configuration that guides a power line to be drawn out to the outside of the outer stator (41).

[0391] The terminal cover portion (351) may be configured to extend radially outward from the cover body (310) and cover the front end of the terminal portion.

[0392] The third discharge cover (300) may include a cover bracket (353) that protrudes radially outward from the cover body (310) and is located opposite the terminal cover portion (351) with respect to the center of the third discharge cover (300).

[0393] By means of the cover bracket (353), the center of gravity of the third discharge cover (300) can be prevented from shifting toward the terminal cover part (351).

[0394] The third discharge cover (300) may be made of a material different from that of the first and second discharge covers (100, 200).

[0395] The third discharge cover (300) may be made of a material that is heavier and has higher strength than the first and second discharge covers (100, 200).

[0396] The third discharge cover (300) may be made of a metal material. For example, the third discharge cover (300) may be made of aluminum.

[0397] In order to reduce the amount of heat transferred from the third discharge cover (300) to the frame (50), if the third discharge cover (300) is made of a non-metallic material like the first and second discharge covers (100, 200), thermal shrinkage may occur due to the high-temperature discharge gas, and a problem arises in that a failure in fastening between the third discharge cover (300) and the frame (50) occurs due to the thermal shrinkage.

[0398] Accordingly, in this embodiment, the third discharge cover (300) connected to the frame (50) is made of a metal material with a low thermal deformation rate, thereby reducing the failure rate of connection to the frame (50).

[0399] FIG. 17 is a drawing showing the discharge valve assembly pressed into the discharge cover and sealing bracket by enlarging part A of FIG. 5, and FIG. 18 is a drawing showing the arrangement of the discharge valve assembly and the cylinder by enlarging part "A" of FIG. 5.

[0400] First, referring to FIG. 13, a valve assembly (420) according to an embodiment of the present invention may come into contact with a first discharge cover (100). For example, the valve assembly (420) may be pressed into the first discharge cover (100).

[0401] In detail, the outer surface of the spring bracket (450) of the valve assembly (420) can be pressed into the inner surface of the first discharge cover (100).

[0402] The first wall (460) provided in the spring bracket (450) can be pressed into the inner surface of the first discharge cover (100). The inner surface of the first discharge cover (100) into which the first wall (460) is pressed may include the inner surface of the first cover flange (150) of the first discharge cover (100). That is, the inner surface of the first cover flange (150) may form the press-fit surface of the spring bracket (450).

[0403] The projection (480) provided on the spring bracket (450) can be pressed into the inner surface of the first cover flange (150).

[0404] It can be understood that the first wall (460) includes a "first press-fit surface" for the first discharge cover (100), and the projection (480) includes a "second press-fit surface" for the first discharge cover (100).

[0405] The above spring bracket (450) is a first press-fit member (f) on the inner circumference of the first cover flange (150). t1 It can be pressed in while forming ). Specifically, the first wall (460) and the projection (480) are the first press-fit section (f t1 It can be pressed into the first cover flange (150) while forming ).

[0406] The above first insertion band (f t1 ) can be formed to a level such that the spring bracket (450) can be easily pressed into the first discharge cover (100). For example, the first press-fit member (f t1 ) can be formed in a range of about 0.2 to 0.4 mm.

[0407] The above first insertion band (f t1 By forming the press-fit member at an appropriate level, problems such as poor assembly of the spring bracket (450) or weakened damping performance for vibration reduction can be prevented if the press-fit member is too large. Also, problems such as the spring bracket (450) separating from the first discharge cover (100) can be prevented if the press-fit member is too small.

[0408] The above spring bracket (450) can be pressed into the above sealing bracket (85).

[0409] In detail, the projection (480) of the spring bracket (450) can be pressed into the sealing bracket (85). For example, the support surface (481) formed at the rear end of the projection (480) can be pressed into the front end of the sealing bracket (85).

[0410] The above spring bracket (450) is a second press-fit member (f) to the above sealing bracket (85). t2 It can be pressed in while forming ). Specifically, the projection (480) is the second press-fit section (f t2 It can be pressed into the sealing bracket (85) while forming ).

[0411] The above second insertion band (f t2 ) can be formed to a level such that the spring bracket (450) can be easily pressed into the sealing bracket (85). For example, the second press-fit member (f t2 ) can be formed in a range of about 0.2 to 0.6 mm.

[0412] The above second insertion band (f t2 By forming it at an appropriate level, the elasticity of the valve spring (430) can be prevented from decreasing (change in elastic modulus) due to the reaction force transmitted by the spring bracket (450) to the valve spring (430).

[0413] The outer surface of the spring bracket (450) is pressed into the first discharge cover (100), and the rearward-facing surface of the spring bracket (450) is pressed into the sealing bracket (85), thereby allowing the spring bracket (450) to be firmly fixed to the surrounding structure and maintain good damping performance.

[0414] In particular, the outer surface of the protrusion (480) is pressed into the first discharge cover (100), and the rear surface of the protrusion (480) can be easily pressed into the sealing bracket (85).

[0415] Next, referring to FIG. 18, the spring bracket (450) can be pressed into the cylinder (60). Specifically, the cylinder support (475) provided on the second wall (470) of the spring bracket (450) can be pressed into the cylinder (60). For example, the cylinder support (475) can be pressed into the first jaw (63) of the cylinder (60).

[0416] The first and second support parts (475a, 475b) of the cylinder support part (475) are pressed into the first jaw (63) while spaced apart from each other, and during the pressing process, the support groove (475c) between the first and second support parts (475a, 475b) provides a deformation space for the cylinder support part (475), so easy pressing can be achieved. Ultimately, the damping performance of the spring bracket (450) can be improved.

[0417] The cylinder support part (475) is a third press-fit section (f) to the cylinder (60). t3 It can be pressed in while forming ). The third press-fit zone (f t3 ) can be formed to a level where the spring bracket (450) can be easily pressed into the cylinder (60). For example, the third press-fit member (f t3 ) can be formed in a range of about 0.5 to 0.55 mm.

[0418] The above third insertion band (f t3 By forming ) at an appropriate level, it is possible to prevent the discharged refrigerant from leaking through the space between the spring bracket (450) and the cylinder (60).

[0419] For convenience of explanation, the first part of the spring bracket (450) that is pressed into the first discharge cover (100) with a first press-fit member may be named the "first press-fit part," the second part of the spring bracket (450) that is pressed into the sealing bracket (85) with a second press-fit member may be named the "second press-fit part," and the third part that is pressed into the cylinder (60) with a third press-fit member may be named the "third press-fit part." Of course, the order of the "first to third press-fit parts" may be defined differently depending on the order in which they are referred to.

[0420] The spring bracket (450) may be installed with a predetermined gap (G1) over at least a portion of the cylinder (60). Specifically, the second inner circumferential portion (472) of the second wall (470) may be installed to form the gap (G1) over the outer surface of the cylinder (60).

[0421] The cylinder (60) may include a contact surface (61a) that repeatedly contacts the rear portion (412) of the discharge valve (410) when the opening and closing operation of the discharge valve (410) is performed. The contact surface (61a) may form the front portion of the cylinder (60).

[0422] The cylinder (60) may include a cylinder outer surface (61b) connecting the contact surface (61a) and the first jaw (63). The cylinder outer surface (61b) extends in a circumferential direction and can face the second inner surface (472) of the second wall (470) of the spring bracket (450).

[0423] The outer surface of the cylinder (61b) may be positioned apart from the second inner surface portion (472) by the gap (G1). For example, the gap (G1) may be formed in a range of, for example, 0.2 to 0.6 mm.

[0424] By forming the gap (G1), the amount of deformation that occurs when the spring bracket (450) is pressed into the first discharge cover (100) and the sealing bracket (85) can be absorbed. That is, the gap (G1) provides a space where deformation of the spring bracket (450) can occur.

[0425] In addition, if the amount of indentation into the surrounding structure of the spring bracket (450) becomes too large, it may limit the reduction of vibration generated in the discharge valve (410). Therefore, there is an advantage in that the amount of vibration can be reduced by forming a gap (G1) between the spring bracket (450) and the cylinder (60).

[0426] FIG. 19 is a cross-sectional view showing the appearance of a refrigerant flowing through the discharge chamber of a discharge cover assembly according to an embodiment of the present invention.

[0427] Referring to FIG. 19, a discharge valve assembly (400) according to an embodiment of the present invention may include a discharge valve (410) that opens and closes a compression space (P) of a cylinder (60), a valve spring (430) that elastically supports the discharge valve (410), and a spring bracket (450) that supports the valve spring (430) on a first discharge cover (410), a sealing bracket (85), and a cylinder (60).

[0428] When the pressure of the compression space (P) exceeds the set pressure, the discharge valve (410) moves to open the compression space (P), and accordingly, the valve spring (430) can be deformed.

[0429] The above discharge cover assembly (100, 200, 300) may include a discharge chamber through which high-pressure discharge gas discharged from the discharge valve (410) flows.

[0430] The above discharge chamber may include a first discharge chamber (A1) formed in the internal space of the first discharge cover (100). The first discharge chamber (A1) may be formed to face the discharge valve (410) as an internal space defined by the inner wall (130) of the first discharge cover (100).

[0431] When the discharge valve (410) is opened, the first discharge chamber (A1) is connected to the compression space (P), and the refrigerant compressed in the compression space (P) can flow into the first discharge chamber (A1).

[0432] The refrigerant in the first discharge chamber (A1) is discharged from the first discharge cover (100) through the discharge hole (123) of the first discharge cover (100), and the discharged refrigerant can flow to the first discharge chamber (A2) of the second discharge cover (200).

[0433] The first discharge chamber (A2) above can be understood as one area among the discharge chambers formed in the internal space of the second discharge cover (200), and as the inner space of the inner wall (238) of the second discharge cover (200).

[0434] The inner wall (238) is inserted into the recess (140) of the first discharge cover (100), and a damping member (180) is interposed in the area where the inner wall (238) and the recess (140) are joined, thereby reducing vibration and noise generated in the first and second covers (100, 200).

[0435] The inner wall (238) can be understood as a partition wall that divides the discharge chamber of the second discharge cover (200) into a first discharge chamber (A2) and a second discharge chamber (A3). The second discharge chamber (A3) can be understood as an outer space of the inner wall (238).

[0436] For convenience of explanation, the first discharge chamber (A1) of the first discharge cover (100) and the first and second discharge chambers (A2, A3) of the second discharge cover (200) may be named, in order, the first discharge chamber (A1), the second discharge chamber (A2), and the third discharge chamber (A3).

[0437] The refrigerant of the second discharge chamber (A2) can flow into the recess (140) of the first discharge cover (100) through the inlet of the pulsating passage formed in the recess (140), that is, the first recess (125). Since the second discharge chamber (A2) and the third discharge chamber (A3) are separated from each other by the inner wall (238) being coupled to the recess (140), the refrigerant of the second discharge chamber (A2) may be restricted from flowing directly into the third discharge chamber (A3).

[0438] The refrigerant introduced into the recess (140) can flow along the ring shape of the recess (140) and be discharged from the recess (140) through the second recess (113a) formed on the opposite side of the first recess (125). The second recess (113a) can function as an outlet for the pulsating flow path.

[0439] The refrigerant can reduce the pulsating noise generated from the discharged refrigerant by flowing through a pulsating path formed along the shape of the recess (140).

[0440] The second recess (113a) can be connected to the outer space of the inner wall (238), that is, the third discharge chamber (A3). Accordingly, the refrigerant discharged from the second recess (113a) can flow into the third discharge chamber (A3).

[0441] The third discharge chamber (A3) can be connected to the discharge hole (280) of the second discharge cover (200). Accordingly, the refrigerant of the third discharge chamber (A3) can be discharged to the outside of the second discharge cover (200) through the discharge hole (280) and discharged to the discharge pipe of the shell (11) through the loop pipe (290).

[0442] When the compression space (P) of the cylinder (60) becomes below the set pressure, the discharge valve (410) can move to close the compression space (P) by the restoring force of the valve spring (430).

[0443] The opening and closing action of the compression space (P) of the discharge valve (410) can be repeated, and during this process, a tapping sound and vibration may occur in the cylinder (60) of the discharge valve (410). The tapping sound and vibration can be reduced by a spring bracket (450) that has a simple structure and is firmly press-fitted and fixed to the surrounding structure.

[0444] A linear compressor according to an embodiment of the present invention can prevent tossing sounds generated at the discharge valve from being transmitted to the outside of the compressor through the discharge cover by improving the structure of the discharge valve assembly. Therefore, industrial applicability is significant.

Claims

1. A cylinder into which a piston that reciprocates in the axial direction is inserted and which forms a compression space; A discharge valve for discharging the refrigerant compressed in the above compression space; A discharge cover forming a discharge chamber for the refrigerant discharged through the above discharge valve; A valve spring that elastically supports the discharge valve; and A spring bracket comprising an inner surface supporting the valve spring, an outer surface supported by the discharge cover, and an end portion seated on the cylinder, A linear compressor characterized in that the inner surface, outer surface, and end of the spring bracket are integrally formed.

2. In Paragraph 1, A linear compressor wherein the spring bracket comprises a first wall including the outer surface and a second wall including the inner surface, and the axial length of the second wall is formed to be longer than the axial length of the first wall.

3. In Paragraph 2, The first wall is configured to surround at least a portion of the second wall, and The above spring bracket includes a projection provided in a stepped portion between the first wall and the second wall, and the projection is positioned to be supported on the discharge cover.

4. In Paragraph 3, A linear compressor comprising a plurality of protrusions arranged in the circumferential direction of the spring bracket, and a space formed between the plurality of protrusions to provide a deformation space for the spring bracket.

5. In Paragraph 2, A linear compressor in which the end seated on the cylinder forms the end of the second wall.

6. In Paragraph 1, The outer surface of the above spring bracket has a first press-fit member and is a linear compressor that is press-fitted into the discharge cover.

7. In Paragraph 1, A linear compressor comprising a cylinder support that is pressed into the cylinder, having a second press-fit member, at the end of the spring bracket.

8. In Paragraph 7, A linear compressor having a cylinder support member that includes a first support member and a second support member spaced apart from each other to be pressed into the cylinder, and a support groove formed between the first and second support members to provide a deformation space upon pressing.

9. In Paragraph 7, The cylinder comprises a cylinder body extending axially for insertion of the piston and a cylinder flange extending radially from the cylinder body, and The above cylinder support is a linear compressor that is pressed into a first flange provided on the cylinder flange.

10. In Paragraph 9, A linear compressor comprising a cylinder flange having a second flange formed with a step relative to the first flange, and further comprising a sealing bracket pressed into the second flange having a third press-fit member.

11. In Paragraph 1, A linear compressor in which the inner surface of the spring bracket is spaced apart from the cylinder by a gap (G1) set thereon.

12. In Paragraph 11, The above cylinder includes an end forming a contact surface to which the discharge valve contacts, and an outer surface of the cylinder connecting the end of the cylinder and the first jaw. A linear compressor in which the inner surface of the spring bracket is spaced apart from the outer surface of the cylinder by the set gap (G1).

13. In Paragraph 1, The above valve spring includes a projection coupling portion to which a projection of the discharge valve is coupled, and a plurality of spring extension portions extending in a spiral shape from a plurality of points of the projection coupling portion. A linear compressor in which the inner surface of the above spring bracket includes a spring coupling portion into which the plurality of spring extension portions are inserted.

14. In Paragraph 1, The above spring bracket includes a first spring support and a second spring support that support both axial ends of the valve spring, and A linear compressor in which at least one of the first and second spring support members has an axial thickness (t2, t3) that is larger than the axial thickness (t1) of the valve spring.

15. In Paragraph 1, The above spring bracket is a linear compressor injection-molded onto the valve spring.

16. A cylinder comprising a cylinder body into which a piston reciprocating in the axial direction is inserted, and a cylinder flange extending radially from the cylinder body; A discharge valve for discharging the refrigerant compressed in the compression space of the above cylinder; A discharge cover forming a discharge chamber for the refrigerant discharged through the above discharge valve; A valve spring that elastically supports the discharge valve; and It includes a spring bracket that supports the above valve spring, and The above spring bracket is a linear compressor comprising an outer surface portion that is pressed into the discharge cover having a first press-fit section.

17. In Paragraph 16, The above spring bracket is a linear compressor comprising a first wall that forms the outer surface of the spring bracket and forms the maximum diameter of the spring bracket.

18. In Paragraph 16, The spring bracket comprises a second wall having an inner surface portion to which the valve spring is coupled, which forms a diameter smaller than that of the first wall. A linear compressor in which the inner surface portion is spaced apart from the cylinder body by a set gap.

19. In Paragraph 18, The above second wall is, A linear compressor comprising a cylinder support member provided at the end of the second wall and pressed into the cylinder flange having a second press-fit member.

20. In Paragraph 16, The above cylinder further includes a sealing bracket that surrounds at least a portion of the cylinder flange, and The above spring bracket is, A linear compressor having a supporting surface that rests on the sealing bracket and comprising a plurality of protrusions arranged in a circumferential direction.

21. In Paragraph 1, The above spring bracket is a linear compressor made of rubber material to enable press-fitting.

22. A cylinder into which a piston that reciprocates in the axial direction is inserted and which forms a compression space; A discharge valve for discharging the refrigerant compressed in the above compression space; A discharge cover forming a discharge chamber for the refrigerant discharged through the above discharge valve; A valve spring that elastically supports the discharge valve; and A spring bracket comprising an inner surface supporting the valve spring, an outer surface supported by the discharge cover, and an end portion seated on the cylinder, A linear compressor in which the inner surface of the spring bracket is spaced apart from the cylinder by a set gap.

23. In Paragraph 22, The above cylinder includes a cylinder body extending in the axial direction and a cylinder flange extending radially from the cylinder body, and A linear compressor in which the inner surface of the spring bracket is spaced apart from the circumferential surface of the cylinder flange by the set gap.

24. In Paragraph 22, The above spring bracket includes a first wall forming the outer surface and a second wall forming the inner surface having a diameter smaller than that of the first wall, and A linear compressor in which the end seated on the cylinder forms the end of the second wall.

25. In Paragraph 22, The outer surface of the above spring bracket is a linear compressor that is pressed into the above discharge cover.

26. In Paragraph 22, The end of the above spring bracket is a linear compressor that is pressed into the above cylinder.

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