Linear compressor

Abstract

The present invention relates to a linear compressor. A linear compressor according to an embodiment of the present invention comprises: a shell; a terminal coupled to an outer circumferential surface of the shell; a terminal bracket installed on the outer circumferential surface of the shell so as to surround the terminal; and a terminal cover mounted on the terminal bracket to cover the terminal, wherein the terminal cover comprises a hook that restrains at least a portion of the terminal bracket.

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.

[0005] The high-temperature refrigerant compressed in the compression space of the cylinder can flow toward the discharge cover via the discharge valve. The discharge cover is coupled to a frame supporting the cylinder and can form a discharge chamber through which the high-temperature discharge gas flows.

[0006] Meanwhile, a terminal that transmits external power to the motor assembly is installed on the outer surface of the shell of the linear compressor. On the outer side of the terminal, a terminal bracket that protects the terminal from external impacts and the like, and a terminal cover that prevents the terminal from being exposed to the outside are installed.

[0007] (Patent Document 1) Korean Registered Patent Publication 10-2357601 (January 26, 2022), Title of Invention: Linear Compressor

[0008] The present invention aims to provide a linear compressor capable of reducing the amount of heat transfer from the discharge cover to the frame and preventing the suction temperature of the refrigerant from rising excessively by improving the thermal insulation structure of the discharge cover.

[0009] The present invention aims to provide a linear compressor capable of lowering the temperature of a discharge cover by configuring the discharge cover, through which high-temperature discharge gas flows, with a material having a low heat transfer coefficient.

[0010] The present invention aims to provide a linear compressor capable of preventing high-temperature heat from being transferred to a frame connected to a discharge cover by lowering the temperature of the discharge cover.

[0011] The present invention aims to provide a linear compressor capable of reducing the amount of heat transferred to the frame by configuring some of the discharge covers forming the discharge chamber among a plurality of discharge covers with a non-metallic material having a low heat transfer coefficient, and preventing defects in the connection between the discharge cover and the frame caused by thermal shrinkage by configuring other discharge covers connected to the frame with a metal material.

[0012] The present invention aims to provide a linear compressor capable of reducing the magnitude of vibration or noise generated during the refrigerant discharge process by stacking a plurality of discharge covers and firmly fixing the plurality of discharge covers.

[0013] The present invention aims to provide a linear compressor in which a plurality of discharge covers can be securely fixed without separate fastening members by press-fitting and fixing them.

[0014] The present invention aims to provide a linear compressor that enables a robust fixation between a terminal cover and a terminal bracket without the need for separate fastening members by press-fitting the terminal cover to the terminal bracket.

[0015] A linear compressor according to an embodiment of the present invention for solving the above problem comprises: a shell; a terminal coupled to the outer surface of the shell; a terminal bracket installed to surround the terminal on the outer surface of the shell; and a terminal cover mounted on the terminal bracket to cover the terminal, wherein the terminal cover comprises a hook that restrains at least a portion of the terminal bracket.

[0016] The terminal cover comprises a cover base portion and a cover side portion that is bent and extends from the edge of the cover base portion, wherein the cover side portion comprises a first side portion having the hook formed thereon and a second side portion positioned opposite to the first side portion, and the second side portion may include a fixing projection that protrudes toward the first side portion and restrains at least a portion of the terminal bracket.

[0017] The terminal bracket comprises a bracket base portion and a first bracket side portion that is bent and extended from one end of the bracket base portion, wherein the first bracket side portion includes a bracket restraint groove formed by being recessed on the outer surface, and the fixing projection is inserted into the bracket restraint groove to restrict the movement of the terminal cover relative to the terminal bracket.

[0018] The terminal cover includes a hook space formed between the cover base portion and the hook, wherein the other end located opposite to the one end of the bracket base portion can be received and restrained in the hook space.

[0019] The terminal cover further includes a first guide rib that protrudes from one side of the cover base portion and is spaced apart opposite the second side portion to form a first mounting groove, wherein the first bracket side portion is inserted into the first mounting groove to restrict the movement of the terminal cover relative to the terminal bracket.

[0020] The above-mentioned fixed projection is positioned on one side of the first guide rib, so that the bracket restraint groove can be positioned outside the first mounting groove.

[0021] The terminal bracket further includes a second bracket side portion that is bent and extended from the other end of the bracket base portion and extends in a direction intersecting the first bracket side portion, wherein the cover side portion further includes a third side portion that is bent and extended from one side of the second side portion toward the first side portion, and the terminal cover further includes a second guide rib that protrudes from one surface of the cover base portion and is spaced apart opposite the third side portion to form a second mounting groove, wherein the second bracket side portion is inserted into the second mounting groove to restrict the movement of the terminal cover relative to the terminal bracket.

[0022] The first guide rib and the second guide rib can be extended in a direction that intersects each other.

[0023] The terminal bracket further includes a first bracket protrusion that is bent and protrudes from an end located opposite to the second bracket side portion at the bracket base portion, and the cover side portion further includes a fourth side portion that is bent and extended from one side of the first side portion toward the second side portion, and the fourth side portion is supported by the first bracket protrusion so as to restrict the movement of the terminal cover relative to the terminal bracket.

[0024] The terminal bracket further includes a second bracket protrusion formed protruding between the first bracket protrusion and the first bracket side portion at the bracket base portion, wherein the terminal cover includes a cover receiving portion recessed and disposed on one side of the cover base portion, and a protruding rib formed protruding between the cover base portion and the cover receiving portion, wherein the protruding rib is supported by the second bracket protrusion to restrict the movement of the terminal cover relative to the terminal bracket.

[0025] The above-mentioned first bracket side portion may further include a side protrusion formed protruding from the inner surface at a portion corresponding to the bracket restraint groove.

[0026] The above bracket base portion may include a bracket opening into which the terminal is inserted.

[0027] The bracket base portion includes a plurality of bracket fastening holes through which a fastening member for screw fastening to the outer surface of the shell passes, and the plurality of bracket fastening holes may be arranged to surround the bracket opening.

[0028] The shell forms an internal space and further includes a main body disposed within the internal space, wherein the main body includes: a discharge cover assembly that supports a discharge valve and forms a discharge chamber for refrigerant discharged through the discharge valve; a frame that supports the discharge cover and is made of a metal material; and a cylinder that is supported inside the frame and into which a piston that reciprocates in the axial direction is inserted, wherein the discharge cover assembly includes a first discharge cover that forms a first discharge chamber for refrigerant discharged through the discharge valve, and a second discharge cover that is coupled to the first discharge cover and forms a discharge chamber for refrigerant discharged from the first discharge chamber, wherein the first discharge cover and the second discharge cover are each supported to be in contact with the frame and may be made of a non-metal material.

[0029] The first discharge cover comprises a discharge hole for discharging refrigerant into the first discharge chamber; and a recessed portion into which the refrigerant discharged from the discharge hole is introduced and to which the second discharge cover is coupled. The second discharge cover comprises an outer wall forming a space into which the first discharge cover is inserted, and an inner wall protruding from the inner surface of the outer wall and coupled to the first discharge cover. The discharge chamber of the second discharge cover may include a second discharge chamber that defines an inner discharge chamber of the inner wall and is connected to the first discharge chamber, and a third discharge chamber that defines an outer discharge chamber of the inner wall.

[0030] According to an embodiment of the present invention, the compression efficiency of the compressor can be improved by improving the thermal insulation structure of the discharge cover to reduce the amount of heat transfer from the discharge cover to the frame and preventing the suction temperature of the refrigerant from rising excessively.

[0031] According to an embodiment of the present invention, by configuring the discharge cover through which high-temperature discharge gas flows with a material having a low heat transfer coefficient, the temperature of the discharge cover can be effectively lowered.

[0032] According to an embodiment of the present invention, by lowering the temperature of the discharge cover, high-temperature heat can be prevented from being transferred to the frame connected to the discharge cover.

[0033] According to an embodiment of the present invention, some of the discharge covers forming the discharge chamber among a plurality of discharge covers are composed of a non-metallic material having a low heat transfer coefficient, thereby reducing the amount of heat transferred to the frame.

[0034] In addition, by making the other discharge cover connected to the frame out of a metal material, it is possible to prevent defects in the connection between the discharge cover and the frame caused by thermal shrinkage.

[0035] According to an embodiment of the present invention, by stacking a plurality of discharge covers and firmly fixing the plurality of discharge covers, the magnitude of vibration or noise generated during the refrigerant discharge process can be reduced.

[0036] According to an embodiment of the present invention, by press-fitting and fixing a plurality of discharge covers, a robust fixation between discharge covers can be achieved without a separate fastening member.

[0037] According to an embodiment of the present invention, by press-fitting and fixing the terminal cover to the terminal bracket, a secure fixation between the terminal cover and the terminal bracket can be achieved without a separate fastening member.

[0038] According to an embodiment of the present invention, accurate alignment between the terminal cover and the terminal bracket can be easily achieved without a separate fastening member through a structure in which the terminal cover and the terminal bracket are fitted, supported, or restrained to each other in multiple parts.

[0039] FIG. 1 is a perspective view of a linear compressor according to an embodiment of the present invention.

[0040] Figure 2 is a cross-sectional view taken along 2-2 of Figure 1.

[0041] Figure 3 is a cross-sectional view taken along 3-3 of Figure 2.

[0042] FIG. 4 is a cross-sectional view showing the configuration of a discharge cover assembly according to an embodiment of the present invention.

[0043] FIG. 5 is an exploded perspective view of the shell, terminal bracket, and terminal cover of a linear compressor according to an embodiment of the present invention.

[0044] FIG. 6 is a front perspective view of a terminal cover according to an embodiment of the present invention.

[0045] FIG. 7 is a rear perspective view of a terminal cover according to an embodiment of the present invention.

[0046] FIG. 8 is an upper perspective view of a terminal bracket according to an embodiment of the present invention.

[0047] FIG. 9 is a lower perspective view of a terminal bracket according to an embodiment of the present invention.

[0048] FIG. 10 is a rear view of a structure in which a terminal cover and a terminal bracket are combined according to an embodiment of the present invention.

[0049] Figure 11 is a cross-sectional view taken along 11-11 of Figure 10.

[0050] Fig. 12 is a cross-sectional view taken along 12-12 of Fig. 10.

[0051] Figure 13 is a cross-sectional view taken along 13-13 of Figure 10.

[0052] 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.

[0053] 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.

[0054] FIG. 1 is a perspective view of a linear compressor according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along 2-2 of FIG. 1. FIG. 3 is a cross-sectional view taken along 3-3 of FIG. 2. FIG. 4 is a cross-sectional view showing the configuration of a discharge cover assembly according to an embodiment of the present invention.

[0055] Referring to FIGS. 1 to 4, 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). For example, the first shell cover (12) may be coupled to the side where the refrigerant is sucked in, and the second shell cover (13) may be coupled to the side where the refrigerant is discharged. In a broad sense, the first shell cover (12) and the second shell cover (13) may be understood as components of the shell (11).

[0056] The shell (11) has a roughly cylindrical shape and can be arranged in a horizontally lying or axially lying configuration. Based on FIG. 2, the shell (11) is extended horizontally and may have a somewhat lower height in the radial direction.

[0057] For example, the linear compressor (10) can have a low height. Therefore, when the linear compressor (10) is installed on the base of the refrigerator's machine room, there is an advantage in that the height of the machine room can be reduced.

[0058] The linear compressor (10) is provided in a shell (11) or shell cover (12, 13) and may include a plurality of pipes (14, 15, 16) capable of sucking, discharging, or injecting refrigerant.

[0059] A plurality of pipes (14, 15, 16) may include a suction pipe (14) that allows the refrigerant to be drawn 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 drawn into the interior of the linear compressor (10) along the axial direction through the suction pipe (14).

[0060] A plurality of pipes (14, 15, 16) may further include a discharge pipe (15) for allowing compressed refrigerant to be discharged from the linear compressor (10) and a process pipe (16) for replenishing refrigerant to the linear compressor (10). For example, the discharge pipe (15) and the process pipe (16) may be connected to the outer surface of the shell (11).

[0061] The linear compressor (10) may include a plurality of support legs (17) coupled to the outer surface of the shell (11). The linear compressor (10) may be fixed to a surface to be seated through the plurality of support legs (17). For example, the plurality of support legs (17) may be coupled to the lower surface of the shell (11) and fixed to the surface to be seated through a fastening member.

[0062] The linear compressor (10) may include a terminal cover (80) coupled to the outer surface of the shell (11). The terminal cover (80) may be provided to prevent exposure by covering a terminal (see '18' in FIG. 5) coupled to the outer surface of the shell (11) to transmit external power to the motor assembly (41, 43, 45). The mounting structure of the terminal cover (80) for the shell (11) will be described later with reference to FIGS. 5 through 13.

[0063] The linear compressor (10) may further include support devices (20, 90) that are positioned on both sides of the shell (11) and support the main body of the linear compressor (10). 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), and a second support device (21) that is coupled to the second shell cover (13) and supports the discharge cover assembly (100, 200, 300).

[0064] Here, the main body of the linear compressor (10) may refer to a component provided inside the shell (11). For example, the main body may include a drive unit that reciprocates 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. 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 (21), etc.

[0065] 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).

[0066] The linear compressor (10) may include a frame (50) provided inside the compressor shell (11) and a cylinder (60) inserted inside the frame (50). The cylinder (60) and the frame (50) may be made of a metal material, for example, aluminum or an aluminum alloy.

[0067] The linear compressor (10) may include a piston (70) that moves in a reciprocating linear motion inside a cylinder (60). The piston (70) may be configured to move in an axial direction.

[0068] The 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).

[0069] The refrigerant sucked in through the suction pipe (14) can flow 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 multiple mufflers combined.

[0070] The linear compressor (10) may include a motor assembly (41, 43, 45) as a linear motor that provides driving force to the piston (70).

[0071] The motor assembly (41, 43, 45) 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).

[0072] 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 a frame (50), and the other side can be supported by a stator cover (32).

[0073] The permanent magnet (45) can move in a linear reciprocating motion by means of 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.

[0074] A permanent magnet (45) can be installed in a magnet frame (46). The magnet frame (46) can be inserted and positioned in the space between the outer stator (41) and the inner stator (43). For example, the magnet frame (46) may have a roughly cylindrical shape.

[0075] The magnet frame (46) can be coupled to the piston (70). Thus, when the permanent magnet (45) reciprocates, the piston (70) can reciprocate axially together with the permanent magnet (45).

[0076] The 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 a 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.

[0077] The linear compressor (10) may 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 a supporter (33).

[0078] The linear compressor (10) may include an inlet guide (23) that is coupled to the rear cover (31) and guides the inflow of refrigerant into the intake muffler (25). At least a portion of the inlet guide (23) may be inserted into the inside of the intake muffler (25).

[0079] The linear compressor (10) may further include a plurality of resonant springs (30) each having a controlled natural frequency so that the piston (70) can resonate.

[0080] A 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.

[0081] The frame (50) can secure the cylinder (60). For example, the cylinder (60) can be pressed into the inside of the frame (50). The frame (50) can be positioned to surround the cylinder (60).

[0082] The frame (50) may include a frame body (51) having a hollow cylindrical shape and forming a space into which a cylinder (60) is inserted, and a frame flange (52) extending radially from the front portion of the frame body (51).

[0083] A cylinder sealing member (502) may be provided between the frame (50) and the cylinder (60). By means of the cylinder sealing member (502), the sealing force may be increased during the press-fitting process between the frame (50) and the cylinder (60). The cylinder sealing member (502) has a ring shape and may be installed on the inner surface of the frame (50) where the flange (62) of the cylinder (60) is seated.

[0084] A bearing channel (58) may be formed in the frame (50) extending from the frame flange (52) toward the frame body (51). The bearing channel (58) may be extended at an angle with respect to the axial direction of the linear compressor (10). A refrigerant acting as a gas bearing among the compressed discharge gas may flow in the bearing channel (58). The refrigerant acting as a gas bearing is supplied between the cylinder body (61) of the cylinder (60) and the piston (70) to cause the piston (70) to float inside the cylinder (60).

[0085] Defines the direction.

[0086] "Axial direction" can be understood as the direction in which the piston (70) reciprocates, i.e., the up-and-down direction in FIG. 3. In the "axial direction," 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.

[0087] 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. 3.

[0088] Inside the cylinder (60), a compression space (P) in which the refrigerant is compressed by the piston (70) may be formed. An intake port for introducing the refrigerant into the compression space (P) is formed at the front of the piston (70), and an intake valve (75) for selectively opening the intake port may be provided in front of the intake port.

[0089] The above suction port may be provided in multiple numbers. The multiple suction ports are spaced apart in the circumferential direction of the piston (70), and refrigerant is introduced into the compression space (P) through the multiple suction ports. The suction valve (75) may be connected to the front of the piston (70) by a fastening member (78), such as a screw or a bolt.

[0090] 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).

[0091] The discharge cover assembly (100, 200, 300) 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).

[0092] 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). By press-fitting the first discharge cover (100) into the second discharge cover (200), the first and second discharge covers (100, 200) can be firmly fixed.

[0093] 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 called 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).

[0094] The refrigerant flowing through the discharge chamber of the first discharge cover (100) and the discharge chamber of the second discharge cover (200) can be in a high-temperature gaseous state. The high-temperature heat can be transferred to the frame (50) supporting the first and second discharge covers (100, 200).

[0095] If high-temperature heat is excessively transferred to the frame (50), that heat becomes a factor that causes the temperature (suction temperature) of the refrigerant sucked into the compression space (P) of the cylinder to rise. When the suction temperature rises, the volume of the refrigerant per unit mass, that is, the specific volume of the refrigerant, increases, causing the volumetric efficiency to decrease, and consequently, a problem may arise in which the compression efficiency of the compressor decreases.

[0096] 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.

[0097] The first discharge cover (100) and the second discharge cover (200) may include plastic. The first discharge cover (100) and the second discharge cover (200) may be composed of the same plastic material, for example, polyamide (PA66) as a type of heat-resistant engineering plastic.

[0098] Since the first and second discharge covers (100, 200) are made of plastic material, the amount of high-temperature heat within the first and second discharge covers (100, 200) that is directly transferred to the frame (50) or transferred between the first and second discharge covers (100, 200) can be reduced. Accordingly, the suction temperature of the refrigerant can be reduced and the compression efficiency of the compressor can be improved.

[0099] Meanwhile, 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). To prevent such problems, the discharge cover assembly (100, 200, 300) according to the present embodiment may include a damping member (180) for reducing vibration of the first and second discharge covers (100, 200).

[0100] The damping member (180) is mounted in the recess (140) of the first discharge cover (100), and the inner wall (238) of the second discharge cover (200) may be configured to support or press the damping member (180). 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 cover.

[0101] By a structure in which a damping member (180) is mounted in a recess (140) of the first discharge cover (100), the recess (140) and the damping member (180) can form a flow path through which refrigerant flows. The flow path can be understood as defining a pulsation path to reduce pulsation that occurs when high-pressure discharge gas flows.

[0102] The linear compressor (10) may include a cap member (285) coupled to the front end of the third part (240) of the second discharge cover (200). For example, the cap member (285) is made of rubber material to prevent noise generated when the second discharge cover (200) comes into contact with the second shell cover (13) and to absorb shock that may occur between the second discharge cover (200) and the second shell cover (13).

[0103] The discharge cover assembly (100, 200, 300) may further include a third discharge cover (300) that supports the second discharge cover (200).

[0104] 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). The third discharge cover (300) may be supported on the front of the frame (50).

[0105] 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) may come into surface contact with the rear surface of the third discharge cover (300). For example, a frame fastening hole (55) into which the fastening member is inserted may be formed in the frame flange (52). Multiple frame fastening holes (55) may be formed. 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 frame fastening hole (55) and the cover fastening hole (335) to fix the frame (50) and the third discharge cover (300).

[0106] 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).

[0107] For example, 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 a fastening member, a failure in connection may occur if the amount of deformation increases due to high heat. Therefore, 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 to reduce the failure rate of connection to the frame (50).

[0108] A frame sealing member (501) capable of increasing bonding strength and preventing refrigerant leakage may be provided at the portion where the second discharge cover (200) and the frame (50) are in surface contact. The frame sealing member (501) has a ring shape and may be installed between the rear surface of the second discharge cover (200) and the front surface of the frame (50).

[0109] The discharge cover assembly (100, 200, 300) may further include a discharge valve assembly (190). The discharge valve assembly (190) may include a discharge valve (191) and a spring assembly (193, 195) that provides elastic force in a direction in which the discharge valve (191) is pressed against the front end of the cylinder (60).

[0110] The spring assembly (193, 195) may include a valve spring (193) composed of a leaf spring and a spring bracket (195) that surrounds the edge of the valve spring (193) to support the valve spring (193).

[0111] The discharge valve (191) can be coupled to the central part of the valve spring (193). When the discharge valve (191) is opened, the refrigerant compressed in the compression space (P) of the cylinder (60) can be discharged and flow into the internal space of the first discharge cover (100). When the discharge of the refrigerant is completed, the discharge valve (191) can be closed by the restoring force of the valve spring (193).

[0112] The spring bracket (195) can be seated on the inner surface of the first discharge cover (100).

[0113] A sealing bracket (197) may be installed around the front portion of the cylinder (60). For example, the sealing bracket (197) may have a ring shape. The sealing bracket (197) may be seated on the front flange of the cylinder (60) and supported on the rear of the spring bracket (195).

[0114] A bracket sealing member (503) may be provided between the sealing bracket (197) and the flange of the cylinder (60). The bracket sealing member (503) is provided on the contact surface between the sealing bracket (197) and the flange of the cylinder (60), and can prevent refrigerant from leaking through the space between the cylinder (60) and the spring assembly (193, 195).

[0115] Below, the flow of refrigerant flowing inside the discharge cover assembly (100, 200, 300) is described.

[0116] The discharge cover assembly (100, 200, 300) may include a discharge chamber (A1, A2, A3) through which high-pressure discharge gas discharged from the discharge valve (191) flows.

[0117] The discharge chambers (A1, A2, A3) 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 (191) as an internal space defined by the inner wall (130) of the first discharge cover (100).

[0118] When the discharge valve (191) 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).

[0119] 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).

[0120] The first discharge chamber (A2) can be understood as one of the discharge chambers (A2, A3) 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).

[0121] 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 discharge covers (100, 200).

[0122] The inner wall (238) can be understood as a partition wall that divides the discharge chambers (A2, A3) of the second discharge cover (200) into the first discharge chamber (A2) and the second discharge chamber (A3). The second discharge chamber (A3) can be understood as the outer space of the inner wall (238).

[0123] 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 referred to in order as the first discharge chamber (A1), the second discharge chamber (A2), and the third discharge chamber (A3).

[0124] 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 joined to the recess (140), the refrigerant of the second discharge chamber (A2) may be restricted from flowing directly into the third discharge chamber (A3).

[0125] 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.

[0126] The pulsating noise generated from the discharged refrigerant can be reduced by the refrigerant flowing through a pulsating path formed along the shape of the recess (140).

[0127] The second recess (113a) can be connected to the outer space of the inner wall (238), that is, the third discharge chamber (A3). Therefore, the refrigerant discharged from the second recess (113a) can flow into the third discharge chamber (A3).

[0128] The third discharge chamber (A3) can be connected to the discharge port (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 port (280) and discharged to the discharge pipe (15) of the shell (11) through the loop pipe (290).

[0129] Hereinafter, a terminal cover (80) and a terminal bracket (90) installed on the outer surface of a shell (11) will be described with reference to FIGS. 5 to 13.

[0130] FIG. 5 is an exploded perspective view of the shell, terminal bracket, and terminal cover of a linear compressor according to an embodiment of the present invention.

[0131] Referring to FIG. 5, a linear compressor (10) according to an embodiment of the present invention may include a terminal (18) coupled to the outer surface of a shell (11). The terminal (18) can be understood as a configuration that transmits external power to the motor assembly (41, 43, 45) of the linear compressor (10). For example, the terminal (18) may be connected to the lead wire of a coil included in the outer stator (41).

[0132] Although not shown, a power connection part (not shown) may be coupled to the terminal (18). The power connection part may include a terminal connection part connected to the terminal (18), an overload protector (OLP), a plurality of wires extending from the terminal connection part and the overload protector, and a holder for organizing the plurality of wires.

[0133] A terminal bracket (90) may be installed on the outer side of the terminal (18). The terminal bracket (90) may be positioned to surround the terminal (18). For example, the terminal bracket (90) may be fixed to the outer surface of the shell (11) through a fastening member (not shown). The terminal bracket (90) may perform the function of protecting the terminal (18) from external impacts, etc.

[0134] A terminal cover (80) may be installed on the outer side of the terminal bracket (90). As described above, the terminal cover (80) can cover and protect the terminal (18) and the overload protection device that are coupled to the outer surface of the shell (11). For example, the terminal cover (80) may be mounted and fixed to the terminal bracket (90) without a separate fastening member.

[0135] Hereinafter, the detailed structure of the terminal cover (80) will be described with reference to FIGS. 6 and FIGS. 7.

[0136] FIG. 6 is a front perspective view of a terminal cover according to an embodiment of the present invention. FIG. 7 is a rear perspective view of a terminal cover according to an embodiment of the present invention.

[0137] A terminal cover (80) according to an embodiment of the present invention may include a cover base portion (81) forming a front surface, an OLP receiving portion (82) in which the overload prevention device is received, and a cover side portion (83) that is bent and extended from the edges of the cover base portion (81) and the OLP receiving portion (82).

[0138] The cover base portion (81) can form the front surface of the terminal cover (80). The cover base portion (81) can cover the terminal (18) coupled to the outer surface of the shell (11) to prevent exposure. Additionally, the cover base portion (81) can cover a part of the power connection portion that supplies external power to the terminal (18). For example, the cover base portion (81) can cover the terminal connection portion of the power connection portion.

[0139] A fixing part (811) protruding from the inner center may be formed on the cover base part (81). The fixing part (811) protrudes toward the inner side of the cover base part (81) to prevent the terminal connection part of the power connection part from being separated from the terminal (18). For example, when the terminal cover (80) is coupled to the terminal bracket (90), the fixing part (811) may come into contact with the terminal connection part.

[0140] On one side of the cover base portion (81), an OLP receiving portion (82) in which the overload protection device is received may be provided. The OLP receiving portion (82) may be formed in a shape corresponding to the shape of the overload protection device received therein. For example, the OLP receiving portion (82) may have an open cylindrical shape. The OLP receiving portion (82) may have a structure that is recessed to one side of the cover base portion (81).

[0141] The terminal cover (80) may further include protruding ribs (821, 822) arranged around the OLP receiving portion (82). For example, the protruding ribs (821, 822) may include a first protruding rib (821) formed between the cover base portion (81) and the OLP receiving portion (82), and a second protruding rib (822) formed on the inner side of the fifth cover side portion (835) spaced apart from the first protruding rib (821). A first guide groove (82a) through which a wire connected to the overload protection device passes may be formed between the first protruding rib (821) and the second protruding rib (822).

[0142] The cover base portion (81) and the OLP receiving portion (82) can be arranged surrounded by the cover side portion (83). That is, the cover side portion (83) can form a side along the perimeter of the terminal cover (80).

[0143] First, for the sake of convenience of explanation, the up-and-down direction is defined as the first direction based on FIGS. 7 and FIGS. 10, and the left-and-right direction intersecting the first direction is defined as the second direction.

[0144] The cover side portion (83) may include a first cover side portion (831) formed by bending from one end of the first direction of the cover base portion (81), a second cover side portion (832) formed by bending from one end of the second direction intersecting the first direction of the cover base portion (81), a third cover side portion (833) formed by bending from the other end of the first direction of the cover base portion (81), a fourth cover side portion (834) formed by bending from the other end of the second direction of the cover base portion (81), and a fifth cover side portion (835) formed surrounding the OLP receiving portion (82).

[0145] One side of the first cover side portion (831) may be connected to the second cover side portion (832), and the other side may be connected to the fifth cover side portion (835). The first cover side portion (831) may be positioned on the opposite side facing the third cover side portion (833).

[0146] One side of the second cover side portion (832) may be connected to the first cover side portion (831), and the other side may be connected to the third cover side portion (833). The second cover side portion (832) may be positioned on the opposite side facing the fourth cover side portion (834) and the fifth cover side portion (835).

[0147] One side of the third cover side portion (833) may be connected to the second cover side portion (832), and the other side may be connected to the fourth cover side portion (834). The third cover side portion (833) may include a second guide groove (833a) that is recessed toward the cover base portion (81).

[0148] One side of the fourth cover side portion (834) may be connected to the fifth cover side portion (835), and the other side may be connected to the third cover side portion (833). The fourth cover side portion (834) may include a third guide groove (834a) that is recessed toward the cover base portion (81). For example, the holder for organizing the plurality of wires may be mounted in the third guide groove (834a).

[0149] A terminal cover (80) according to an embodiment of the present invention may further include a hook (84) protruding inward from a third cover side portion (833) of a cover side portion (83). The hook (84) may be formed to protrude toward a first cover side portion (831) from an inner end of the third cover side portion (833). The hook (84) may be spaced apart from the cover base portion (81). For example, a hook space (84a) in which a restraining object is placed may be formed between the hook (84) and the cover base portion (81). As will be described later, the hook (84) may be formed to mount the terminal cover (80) to a terminal bracket (90).

[0150] A terminal cover (80) according to an embodiment of the present invention may further include a cover protrusion (85) protruding outward from a second cover side portion (832) of a cover side portion (83). The cover protrusion (85) may be provided to secure the terminal cover (80) to a terminal bracket (90). Through the cover protrusion (85), the terminal cover (80) may be screw-fastened to the terminal bracket (90).

[0151] The cover protrusion (85) may include a cover fastening portion (851) extending outward from the cover base portion (81) and a reinforcing rib (852) bent from the second cover side portion (832) and extending outward. The reinforcing rib (852) may be formed by bending from the cover fastening portion (851). That is, the cover fastening portion (851) and the reinforcing rib (852) may extend in a direction that intersects each other.

[0152] The cover fastening portion (851) may include a first fastening hole (85a) into which a fastening member, such as a screw, is fastened. A fastening member that is fastened by passing through the second fastening hole ('932a' in FIG. 8) of the terminal bracket (90) may be fastened by passing through the first fastening hole (85a).

[0153] However, not limited thereto, in other embodiments, the cover protrusion (85) on the terminal cover (80) may be omitted.

[0154] A terminal cover (80) according to an embodiment of the present invention may further include a guide rib (87) protruding from one side of a cover base portion (81). The guide rib (87) may include a first guide rib (871) spaced apart from a first cover side portion (831) and a second guide rib (872) spaced apart from a second cover side portion (832).

[0155] The first guide rib (871) may be spaced apart from the first cover side portion (831). For example, a first mounting groove (871a) may be formed between the first guide rib (871) and the first cover side portion (831).

[0156] The second guide rib (872) may be spaced apart from the second cover side portion (832). For example, a second mounting groove (872a) may be formed between the second guide rib (872) and the second cover side portion (832).

[0157] The first guide rib (871) and the second guide rib (872) can extend in different directions. Accordingly, a mating member extending in a different direction can be inserted into the first mounting groove (871a) and the second mounting groove (872a) to form a secure mounting.

[0158] A terminal cover (80) according to an embodiment of the present invention may further include a fixing projection (88) protruding inward from a first cover side portion (831) of a cover side portion (83). The fixing projection (88) may be formed to protrude from the first cover side portion (831) toward a third cover side portion (833). The fixing projection (88) may be disposed on one side of a first guide rib (871). As will be described later, the fixing projection (88) may be formed to mount the terminal cover (80) to a terminal bracket (90).

[0159] Hereinafter, the detailed structure of the terminal bracket (90) will be described with reference to FIGS. 8 and FIGS. 9.

[0160] FIG. 8 is an upper perspective view of a terminal bracket according to an embodiment of the present invention. FIG. 9 is a lower perspective view of a terminal bracket according to an embodiment of the present invention.

[0161] Referring to FIGS. 8 and 9, a terminal bracket (90) according to an embodiment of the present invention may include a bracket base portion (91) forming a front surface, a first bracket side portion (92) formed by bending from one end of the first direction of the bracket base portion (91), and a second bracket side portion (93) formed by bending from one end of the second direction intersecting the first direction of the bracket base portion (91).

[0162] The bracket base portion (91) can form the front surface of the terminal bracket (90). The bracket base portion (91) can be positioned to surround the terminal (18) coupled to the outer surface of the shell (11).

[0163] The bracket base portion (91) may include a bracket opening (91a) formed by opening in the central portion. A terminal (18) may be disposed through the bracket opening (91a). That is, the bracket opening (91a) may be formed in a shape corresponding to the exposed portion of the terminal (18).

[0164] The bracket base portion (91) may include bracket mounting holes (91b) arranged around the bracket opening (91a). The bracket mounting holes (91b) may be formed in multiple numbers. The multiple bracket mounting holes (91b) may be arranged to surround the bracket opening (91a). A fastening member may be inserted into the bracket mounting holes (91b).

[0165] For example, a fastening hole (not shown) may be formed in the shell (11) at a position corresponding to the bracket mounting hole (91b). The fastening hole formed in the shell (11) may be formed in a number corresponding to the bracket mounting hole (91b) formed in the bracket base part (91). The fastening member may be fastened to the bracket mounting hole (91b) and the fastening hole of the shell (11) to fix the terminal bracket (90) to the outer surface of the shell (11).

[0166] The first bracket side portion (92) may be formed by bending from one end of the first direction of the bracket base portion (91). The first bracket side portion (92) may be formed by extending along one end of the first direction of the bracket base portion (91). For example, the first bracket side portion (92) may include an inner surface positioned toward the bracket base portion (91) and an outer surface formed on the opposite side of the inner surface.

[0167] A bracket restraint groove (92a) may be formed on the outer surface of the first bracket side portion (92). The bracket restraint groove (92a) may be formed by being recessed toward the inner side of the first bracket side portion (92). As will be described later, a fixing projection (88) of the terminal cover (80) may be received and restrained in the bracket restraint groove (92a). For example, the bracket restraint groove (92a) may be formed in a shape corresponding to the fixing projection (88) of the terminal cover (80).

[0168] A side protrusion (92b) may be formed on the inner surface of the first bracket side portion (92). The side protrusion (92b) can be understood as a configuration protruding to form a bracket restraint groove (92a) on the outer surface within a limited thickness of the first bracket side portion (92). That is, by forming a side protrusion (92b) on the inner surface of the first bracket side portion (92), the bracket restraint groove (92a) can be formed on the outer surface while simultaneously minimizing the thickness. Through this, the first bracket side portion (92) can be easily inserted into the first mounting groove (871a) and securely mounted.

[0169] The second bracket side portion (93) may be formed by bending from one end of the second direction of the bracket base portion (91). The second bracket side portion (93) may be formed by extending along one end of the second direction of the bracket base portion (91).

[0170] For example, the second bracket side portion (93) may include a bracket rib (931) formed by bending from one end of the second direction of the bracket base portion (91), and a bracket fastening portion (932) formed by bending outward from the end of the bracket rib (931). That is, the bracket rib (931) and the bracket fastening portion (932) may extend in directions that intersect each other.

[0171] The bracket fastening portion (932) may include a second fastening hole (932a) into which a fastening member, such as a screw, is fastened. A fastening member that is fastened by passing through the first fastening hole (85a) of the terminal cover (80) may be fastened by passing through the second fastening hole (932a).

[0172] However, not limited thereto, as in other embodiments, the bracket fastening part (932) in the terminal bracket (90) may be omitted.

[0173] The terminal bracket (90) may further include a first bracket protrusion (94) formed by bending from the other end of the first direction of the bracket base portion (91). The first bracket protrusion (94) may be extended by bending in an inclined direction from the other end of the first direction of the bracket base portion (91). For example, the first bracket protrusion (94) may include a third fastening hole (94a). The first bracket protrusion (94) may be positioned on the opposite side facing the first bracket side portion (92).

[0174] The terminal bracket (90) may further include a second bracket protrusion (95) formed by bending from the second direction other end of the bracket base portion (91). The second bracket protrusion (95) may be positioned between the first bracket side portion (92) and the first bracket protrusion (94). The second bracket protrusion (95) may be positioned on the opposite side facing the second bracket side portion (93).

[0175] The terminal bracket (90) may further include a third bracket protrusion (96) formed by protruding from the other end of the second direction of the bracket base portion (91). The third bracket protrusion (96) may be formed by protruding from the other end of the second direction of the bracket base portion (91) toward the other side of the second direction. For example, the third bracket protrusion (96) may be positioned between the first bracket side portion (92) and the second bracket protrusion (95).

[0176] Hereinafter, the mounting structure between the terminal cover (80) and the terminal bracket (90) will be described with reference to FIGS. 10 to 13.

[0177] FIG. 10 is a rear view of a structure in which a terminal cover and a terminal bracket are combined according to an embodiment of the present invention. FIG. 11 is a cross-sectional view taken along 11-11 of FIG. 10. FIG. 12 is a cross-sectional view taken along 12-12 of FIG. 10. FIG. 13 is a cross-sectional view taken along 13-13 of FIG. 10.

[0178] Referring to FIGS. 10 to 13, the terminal cover (80) can be mounted on the terminal bracket (90). The terminal cover (80) and the terminal bracket (90) can be firmly mounted to each other without separate fastening members through a structure in which they are joined, supported, or restrained to each other in multiple parts.

[0179] First, the hook (84) included in the terminal cover (80) can restrain the bracket base portion (91). For example, the other end of the bracket base portion (91) in the first direction can be inserted into the hook space (84a) formed by the hook (84) included in the terminal cover (80). Accordingly, the movement of the terminal cover (80) in the forward and backward directions can be restricted.

[0180] Additionally, a fixing projection (88) protruding inward from the first cover side portion (831) of the terminal cover (80) can restrain the first bracket side portion (92) of the terminal bracket (90). For example, the fixing projection (88) of the terminal cover (80) can be inserted into a bracket restraining groove (92a) formed on the outer surface of the first bracket side portion (92) of the terminal bracket (90) to restrain the first bracket side portion (92). That is, the fixing projection (88) of the terminal cover (80) is inserted into the bracket restraining groove (92a) of the first bracket side portion (92) so that the movement of the terminal cover (80) in the forward and backward directions can be restricted.

[0181] Additionally, the bracket restraint groove (92a) of the first bracket side portion (92) may be formed in a shape corresponding to the fixing projection (88) of the terminal cover (80). Accordingly, when the fixing projection (88) of the terminal cover (80) is inserted into the bracket restraint groove (92a) of the first bracket side portion (92), the movement of the fixing projection (88) in the second direction may be restricted. In other words, the horizontal movement of the terminal cover (80) may be restricted by inserting the fixing projection (88) into the bracket restraint groove (92a).

[0182] Meanwhile, since the fixing projection (88) is positioned on one side of the first guide rib (871), the bracket restraint groove (92a) may be positioned on the outside of the first mounting groove (871a). That is, the bracket restraint groove (92a) may be formed in the part of the first bracket side portion (92) that is not inserted into the first mounting groove (871a). Accordingly, when the fixing projection (88) is inserted into the bracket restraint groove (92a) and restrained, the first bracket side portion (92) is inserted into the first mounting groove (871a), allowing the terminal cover (80) to be mounted more securely to the terminal bracket (90).

[0183] The first bracket side portion (92) of the terminal bracket (90) can be inserted into a first mounting groove (871a) formed between the first guide rib (871) and the first cover side portion (831) of the terminal cover (80). By inserting the first bracket side portion (92) into the first mounting groove (871a), the movement of the first bracket side portion (92) in the first direction can be restricted. In other words, by inserting the first bracket side portion (92) into the first mounting groove (871a), the horizontal movement of the terminal cover (80) can be restricted.

[0184] The bracket rib (931) of the terminal bracket (90) can be inserted into a second mounting groove (872a) formed between the second guide rib (872) and the second cover side portion (832) of the terminal cover (80). By inserting the bracket rib (931) into the second mounting groove (872a), the movement of the bracket rib (931) in the second direction can be restricted. In other words, by inserting the bracket rib (931) into the second mounting groove (872a), the horizontal movement of the terminal cover (80) can be restricted.

[0185] The bracket fastening portion (932) of the terminal bracket (90) may be supported by the cover protrusion (85) of the terminal cover (80). For example, the front of the bracket fastening portion (932) may be supported by the cover fastening portion (851), and one end of the bracket fastening portion (932) may be supported by a reinforcing rib (852).

[0186] In other words, the cover fastening portion (851) of the terminal cover (80) is supported by the front surface of the bracket fastening portion (932), and the reinforcing rib (852) can be supported by one end of the bracket fastening portion (932). The bent-shaped cover protrusion (85) is supported by the bracket fastening portion (932), so that the terminal cover (80) can be easily aligned to the mounting position on the terminal bracket (90).

[0187] The second bracket protrusion (95) of the terminal bracket (90) can be supported by the fourth cover side portion (834) of the terminal cover (80). Since the fourth cover side portion (834) of the terminal cover (80) is supported by the second bracket protrusion (95), the movement of the fourth cover side portion (834) in the second direction can be restricted. In other words, since the fourth cover side portion (834) is supported by the second bracket protrusion (95), the horizontal movement of the terminal cover (80) can be restricted. In particular, since the fourth cover side portion (834) is supported by the second bracket protrusion (95) while the bracket rib (931) of the terminal bracket (90) is inserted into the second mounting groove (872a) of the terminal cover (80), the mounting position of the terminal cover (80) can be easily aligned with respect to the terminal bracket (90).

[0188] Additionally, the second bracket protrusion (95) may be configured to support and guide the wire connected to the overload protection device passing through the first guide groove (82a) of the terminal cover (80). Additionally, the second bracket protrusion (95) may be configured to separate the wire extending toward the OLP receiving portion (82) to be connected to the overload protection device and the wire extending outward through the third guide groove (834a). For example, the wire extending from the cover base portion (81) toward the OLP receiving portion (82) may be placed on one side of the second bracket protrusion (95), and the wire extending outward from the cover base portion (81) through the third guide groove (834a) may be placed on the other side of the second bracket protrusion (95). Thus, multiple wires extending from the terminal (18) can be easily managed.

[0189] The third bracket protrusion (96) of the terminal bracket (90) can be supported by the first protruding rib (821) of the terminal cover (80). Since the first protruding rib (821) of the terminal cover (80) is supported by the third bracket protrusion (96), the movement of the first protruding rib (821) in the first direction can be restricted. In other words, since the first protruding rib (821) is supported by the third bracket protrusion (96), the vertical movement of the terminal cover (80) can be restricted. In particular, since the first protruding rib (821) is supported by the third bracket protrusion (96) while the first bracket side portion (92) of the terminal bracket (90) is inserted into the first mounting groove (871a) of the terminal cover (80), the terminal cover (80) can be easily aligned with the mounting position of the terminal bracket (90).

[0190] According to an embodiment of the present invention, by press-fitting the terminal cover (80) to the terminal bracket (90), a secure fixation between the terminal cover (80) and the terminal bracket (90) can be achieved without a separate fastening member.

[0191] According to an embodiment of the present invention, the terminal cover (80) and the terminal bracket (90) can be easily aligned accurately without a separate fastening member through a structure in which they are joined, supported, or restrained to each other in a plurality of parts.

[0192] According to an embodiment of the present invention, the compression efficiency of a compressor can be improved by improving the thermal insulation structure of the discharge cover to reduce the amount of heat transfer from the discharge cover to the frame and preventing the suction temperature of the refrigerant from rising excessively, and thus industrial applicability is recognized.

[0193] According to an embodiment of the present invention, by configuring a discharge cover through which high-temperature discharge gas flows with a material having a low heat transfer coefficient, the temperature of the discharge cover can be effectively lowered, and thus industrial applicability is recognized.

[0194] According to an embodiment of the present invention, by lowering the temperature of the discharge cover, it is possible to prevent high-temperature heat from being transferred to the frame connected to the discharge cover, and thus industrial applicability is recognized.

[0195] According to an embodiment of the present invention, some of the discharge covers forming the discharge chamber among a plurality of discharge covers are composed of a non-metallic material having a low heat transfer coefficient, thereby reducing the amount of heat transferred to the frame, and thus industrial applicability is recognized.

[0196] In addition, since the other discharge cover connected to the frame is made of a metal material, it is possible to prevent defects in the connection between the discharge cover and the frame caused by thermal shrinkage, thus industrial applicability is recognized.

[0197] According to an embodiment of the present invention, by configuring a plurality of discharge covers by stacking them and firmly fixing the plurality of discharge covers, the magnitude of vibration or noise generated during the refrigerant discharge process can be reduced, and thus industrial applicability is recognized.

[0198] According to an embodiment of the present invention, by press-fitting and fixing a plurality of discharge covers, a robust fixation between discharge covers can be achieved without a separate fastening member, and thus industrial applicability is recognized.

[0199] According to an embodiment of the present invention, by press-fitting and fixing the terminal cover to the terminal bracket, a secure fixation between the terminal cover and the terminal bracket can be achieved without a separate fastening member, and thus industrial applicability is recognized.

[0200] According to an embodiment of the present invention, the terminal cover and the terminal bracket can be easily aligned accurately without a separate fastening member through a structure in which they are fitted, supported, or restrained to each other in multiple parts, and thus industrial applicability is recognized.

Claims

1. Shell; A terminal coupled to the outer surface of the above shell; A terminal bracket installed around the terminal on the outer surface of the shell; and It includes a terminal cover mounted on the terminal bracket and covering the terminal, The above terminal cover is a linear compressor comprising a hook that restrains at least a portion of the terminal bracket.

2. In Paragraph 1, The above terminal cover is, Cover base part, and It includes a cover side portion that is folded and extended from the edge of the cover base portion, The above-mentioned cover side portion is, The first side portion having the above-mentioned hook formed thereon, and It includes a second side portion positioned opposite to the first side portion, A linear compressor comprising a fixing projection that protrudes toward the first side portion and restrains at least a portion of the terminal bracket.

3. In Paragraph 2, The above terminal bracket is, Bracket base part, and It includes a first bracket side portion that is bent and extended from one end of the bracket base portion, The above-mentioned first bracket side portion includes a bracket restraint groove formed by being recessed on the outer surface, and A linear compressor in which the fixing projection is inserted into the bracket restraint groove to restrict the movement of the terminal cover relative to the terminal bracket.

4. In Paragraph 3, The above terminal cover is, It includes a hook space formed between the above-mentioned cover base part and the above-mentioned hook, wherein In the above hook space, A linear compressor in which the other end located opposite to the one end of the bracket base portion is received and restrained.

5. In Paragraph 3, The above terminal cover is, It further includes a first guide rib that protrudes from one side of the cover base portion and is spaced apart opposite the second side portion to form a first mounting groove, A linear compressor in which a side portion of the first bracket is inserted into the first mounting groove to restrict the movement of the terminal cover relative to the terminal bracket.

6. In Paragraph 5, The above fixed projection is disposed on one side of the first guide rib, The above bracket restraint groove is a linear compressor disposed outside the above first mounting groove.

7. In Paragraph 5, The above terminal bracket is, It further includes a second bracket side portion that is bent and extended from the other end of the bracket base portion and extends in a direction intersecting the first bracket side portion, The above-mentioned cover side portion is, It further includes a third side portion that is bent and extended from one side of the second side portion toward the first side portion, The above terminal cover is, It further includes a second guide rib that protrudes from one side of the cover base portion and is spaced apart opposite the third side portion to form a second mounting groove, A linear compressor in which the second bracket side portion is inserted into the second mounting groove to restrict the movement of the terminal cover relative to the terminal bracket.

8. In Paragraph 7, A linear compressor in which the first guide rib and the second guide rib extend in directions intersecting each other.

9. In Paragraph 7, The above terminal bracket is, It further includes a first bracket protrusion that is bent and protrudes from an end located opposite to the second bracket side portion at the bracket base portion, The above-mentioned cover side portion is, It further includes a fourth side portion that is bent and extended from one side of the first side portion toward the second side portion, A linear compressor in which the fourth side portion is supported by the first bracket protrusion to restrict the flow of the terminal cover relative to the terminal bracket.

10. In Paragraph 9, The above terminal bracket is, The bracket base portion further includes a second bracket protrusion formed protruding between the first bracket protrusion and the first bracket side portion, wherein The above terminal cover is, A cover receiving portion disposed by being recessed on one side of the above-mentioned cover base portion, and It includes a protruding rib formed protruding between the cover base portion and the cover receiving portion, A linear compressor in which the above-mentioned protruding rib is supported by the above-mentioned second bracket protrusion to restrict the flow of the terminal cover relative to the terminal bracket.

11. In Paragraph 3, The above-mentioned first bracket side portion is, A linear compressor further comprising a side protrusion formed protruding from a portion corresponding to the bracket restraint groove on the inner surface.

12. In Paragraph 3, The above bracket base part is, A linear compressor including a bracket opening into which the above terminal is inserted.

13. In Paragraph 12, The above bracket base part is, The shell includes a plurality of bracket fastening holes through which a fastening member for screw fastening passes on the outer surface of the shell, A linear compressor in which the plurality of bracket fastening holes are arranged to surround the bracket opening.

14. In Paragraph 1, The above shell forms an internal space, and It further includes a main body disposed within the above internal space, The above main body is, A discharge cover assembly that supports a discharge valve and forms a discharge chamber for the refrigerant discharged through the discharge valve; A frame that supports the discharge cover and is made of a metal material; and It includes a cylinder into which a piston that reciprocates in the axial direction is inserted, which is supported inside the above frame, and The above discharge cover assembly is, A first discharge cover forming a first discharge chamber for the refrigerant discharged through the above discharge valve, and It includes a second discharge cover coupled to the first discharge cover and forming a discharge chamber for the refrigerant discharged from the first discharge chamber, and The first discharge cover and the second discharge cover are, A linear compressor, each supported to be in contact with the frame and made of a non-metallic material.

15. In Paragraph 14, The above-mentioned first discharge cover is, A discharge hole for discharging refrigerant to the first discharge chamber; and It includes a recessed portion into which the refrigerant discharged from the above discharge hole is introduced and the second discharge cover is coupled, The above second discharge cover is, An outer wall forming a space into which the first discharge cover is inserted, and It includes an inner wall that protrudes from the inner surface of the outer wall and is coupled to the first discharge cover, The discharge chamber of the second discharge cover above is, Defines an inner discharge chamber of the inner wall and a second discharge chamber connected to the first discharge chamber, and A linear compressor comprising a third discharge chamber defining an outer discharge chamber of the inner wall.

Images