KR20200098291A - Linear compressor - Google Patents

Abstract

The present invention relates to a linear compressor capable of strongly fixing a filter member installed in a cylinder. The linear compressor according to an embodiment of the present invention includes: a piston reciprocating in an axial direction; a cylinder installed to receive the piston; a gas inflow passage recessed radially inward from the outer peripheral surface of the cylinder; a seating groove further recessed radially inward in the gas inflow passage; a filter member disposed in the gas inflow passage; and a filter fixing member inserted into the seating groove and pressing the filter member to the inside of the cylinder. Also, other embodiments are possible.

Description

Linear compressor {Linear compressor}

The present invention relates to a linear compressor.

In general, a compressor is a mechanical device that increases pressure by receiving power from a power generating device such as an electric motor or a turbine and compressing air, refrigerant, or other various operating gases, and is widely used throughout the home appliance or industry. Is being used.

Such compressors may be classified into a reciprocating compressor, a rotary compressor, and a scroll compressor.

In the reciprocating compressor, a compression space for compressing a working gas is formed between a piston and a cylinder, and the piston compresses the refrigerant introduced into the compression space while linearly reciprocating within the cylinder.

Recently, among the reciprocating compressors, a piston is directly connected to a driving motor for reciprocating linear motion, so that compression efficiency can be improved without mechanical loss due to motion conversion, and a linear compressor having a simple structure has been developed.

Prior literature Korean Patent Laid-Open Publication No. 10-2016-0000324 (January 4, 2016) discloses a linear compressor.

The linear compressor disclosed in the prior literature discloses a gas bearing technology for performing a bearing function by supplying a refrigerant gas to a space between a cylinder and a piston. The refrigerant gas flows toward the outer circumferential surface of the piston through an orifice formed in the cylinder to perform a bearing function for the piston reciprocating.

On the other hand, in order to improve the compression efficiency of the linear compressor, it is necessary to minimize the consumption flow rate of refrigerant gas used as a gas bearing. In order to reduce the consumption flow rate of such refrigerant gas, the diameter or number of orifices formed in the cylinder must be reduced.If the diameter of the orifice is reduced or the number of orifices is reduced, the orifice is clogged, which greatly affects compressor reliability.

That is, when the diameter of the orifice of the cylinder is small or the number of orifices is small, there is a problem that clogging occurs due to oil or a mixture of oil and dust, and thus the function of the gas bearing is significantly reduced.

In order to solve this problem, the prior literature uses a filter member of a sediment filter type by winding a thread formed of a polyethylene terephtahalate (PET) material around a gas inlet passage formed on the outer peripheral surface of a cylinder.

However, in this case, when the filter is exposed to the operating conditions of the compressor in which the pressure and temperature rapidly change for a long time, there is a problem that the filtering performance decreases as time passes due to a decrease in the tension of the filter. If the filtering performance is significantly deteriorated, there is a problem that the orifice is clogged by an oil or dust mixture.

Korean Patent Publication No. 10-2016-0000324 (January 4, 2016)

The present invention has been proposed to improve the above problems, and an object of the present invention is to provide a linear compressor capable of strongly fixing a filter member installed in a cylinder.

Another object of the present invention is to provide a linear compressor capable of maintaining the tension of the filter by pressing the filter member into the cylinder even when the compressor is operated for a long time.

Another object of the present invention is to provide a linear compressor in which a filter fixing member can be mounted and separated by a simple structure.

A linear compressor according to an embodiment of the present invention for achieving the above object includes a piston reciprocating in an axial direction and a cylinder accommodating the piston. The cylinder has a gas inlet passage that is recessed radially inward from the outer circumferential surface, and a seating groove that is further recessed radially inward from the gas inlet passage.

At this time, a filter member is disposed in the gas inlet passage, and a filter fixing member for pressing the filter member into the cylinder is inserted into the seating groove, so that a part of the filter member is in close contact with the bottom surface of the seating groove. Can be pressurized.

By such a filter fixing member, the filter member can be firmly fixed to the cylinder, and a phenomenon of being separated or idle from the inside of the cylinder is prevented. In addition, since the filter fixing member presses a part of the filter member into the cylinder, even if the compressor is operated for a long time, the tension of the filter member is maintained, thereby minimizing deterioration of filter performance.

In addition, the gas inlet passage may extend along a circumferential direction of the cylinder, and the filter member may be installed by being wound along the gas inlet passage in a circumferential direction. In this case, the seating groove may be formed by being further recessed in the axial direction in the gas inflow passage.

According to an embodiment, in the filter fixing member, a cover portion accommodated in the seating groove and covering a part of the filter member, a first seating portion extending from the cover portion and seated inside the seating groove, and A second seating portion extending from the cover portion and seated inside the seating groove may be included.

In this case, the first seating portion may extend from one end of the cover portion to the inside of the seating groove, and the second seating portion may extend from the other end of the cover portion to the inside of the seating groove. In this case, a part of the filter member may be disposed between the first mounting portion and the second mounting portion. Accordingly, the filter fixing member may be strongly inserted into the cylinder.

In addition, each of the first and second seating portions includes a first surface forming a plane and a second surface forming a curved surface, and each first surface is disposed to face each other, and each The two sides can be convexly rounded toward opposite directions.

Here, the filter member may include a thread formed of polyethylene terephtahalate (PET) material. In addition, the filter fixing member may be formed of an engineering plastic material.

According to another embodiment, the filter fixing member is accommodated in the seating groove, and the cover portion covering a part of the filter member and both ends of the cover portion are formed to be rounded, respectively, and the seating portions inserted into both sides of the seating groove Can be included.

According to another embodiment, the filter fixing member may include a plate seated in the seating groove and an extension portion extending upward from the plate and plastically deformed to cover a part of the filter member.

In this case, the plate may be in close contact with the bottom surface of the seating groove, and the extension portion may be in close contact with the inner surface of the seating groove. The extension part may be formed to have the same width as that of the plate.

In addition, the extension part includes a first extension part extending upward from one end of the plate and a second extension part extending upward from the other end of the plate, and the first extension part and the second extension part, It may be plastically deformed in a direction closer to each other to be in close contact with the filter member.

According to the linear compressor according to the present invention having the configuration as described above has the following effects.

First, by providing a filter fixing member that holds the filter member installed in the cylinder, there is an advantage that the filter member is prevented from being separated from the cylinder or being idle.

In particular, since the filter fixing member can pressurize the filter member from the outside of the cylinder to the inside, even if the tension of the seal filter is weakened by the long operation of the compressor, the tension of the seal filter can be maintained and the filter performance is maintained accordingly. Can be.

Second, since the filter fixing member is easily mounted in a seating groove that is further recessed radially inward in the gas inflow passage in which the filter member is installed, the filter member can be mounted and separated by a simple structure.

Third, a part of the filter fixing member is seated in the seating groove, and the other part is plastically deformed to fix the filter member, so there is an advantage in that the installation freedom of the filter fixing member is high.

1 is a perspective view of a linear compressor according to a first embodiment of the present invention.
2 is an exploded perspective view of a compressor main body accommodated in a shell of a linear compressor according to a first embodiment of the present invention.
3 is a view showing a cross section taken along IV-IV' of FIG. 1;
4 is a perspective view of a cylinder according to a first embodiment of the present invention.
5 is a view showing a state in which the filter member is disposed in the seating groove of the cylinder according to the first embodiment of the present invention.
6 is a view showing a cross section taken along line II-II' of FIG. 5;
7 is a perspective view of a filter fixing member according to a first embodiment of the present invention.
8 is a view showing a state in which the filter fixing member according to the first embodiment of the present invention is disposed in the mounting groove of the cylinder.
9 is a view showing a cross-section taken along line III-III' of FIG.
10 is a perspective view of a filter fixing member according to a second embodiment of the present invention.
11 is a cross-sectional view showing a state in which a filter fixing member according to a second embodiment of the present invention is disposed in a mounting groove of a cylinder.
12 is a perspective view of a cylinder according to a third embodiment of the present invention.
13 is a perspective view of a filter fixing member according to a third embodiment of the present invention.
14A is a cross-sectional view taken along VI-VI' of FIG. 12;
14B is a cross-sectional view showing a filter fixing member disposed in a mounting groove of a cylinder in FIG. 14A.
14C is a cross-sectional view showing a filter member disposed in a seating groove in FIG. 14B.
14D is a cross-sectional view showing a state in which the filter member is fixed by the filter fixing member in FIG. 14C.
15 is a perspective view of a filter fixing member according to a fourth embodiment of the present invention.
16A is a cross-sectional view showing a mounting groove of a cylinder according to a fourth embodiment of the present invention.
16B is a cross-sectional view showing a filter fixing member disposed in a seating groove in FIG. 16A.
16C is a cross-sectional view showing a filter member disposed in a seating groove in FIG. 16B.
16D is a cross-sectional view showing a state in which the filter member is fixed by the filter fixing member in FIG. 16C.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with an understanding of the embodiment of the present invention, a detailed description thereof will be omitted.

In addition, in describing the constituent elements of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

1 is a perspective view of a linear compressor according to a first embodiment of the present invention.

Referring to FIG. 1, a linear compressor 10 according to a first embodiment of the present invention includes a shell 101 and shell covers 102 and 103 coupled to the shell 101. In a broader sense, the shell covers 102 and 103 can be understood as one configuration of the shell 101.

A leg 50 may be coupled to the lower side of the shell 101. The leg 50 may be coupled to a base of a product on which the linear compressor 10 is installed. For example, the product may include a refrigerator, and the base may include a machine room base of the refrigerator. As another example, the product may include an outdoor unit of an air conditioner, and the base may include a base of the outdoor unit.

The shell 101 has a substantially cylindrical shape, and may be laid in a horizontal direction or laid in an axial direction. Referring to FIG. 1, the shell 101 extends long in the horizontal direction and may have a slightly lower height in the radial direction. That is, since the linear compressor 10 may have a low height, for example, when the linear compressor 10 is installed on a machine room base of a refrigerator, there is an advantage of reducing the height of the machine room.

On the outer surface of the shell 101, a terminal 108 may be installed. The terminal 108 is understood as a configuration for transferring external power to the motor assembly 140 (refer to FIG. 3) of the linear compressor. In particular, the terminal 108 may be connected to the lead wire of the coil 141c (see FIG. 3).

Outside of the terminal 108, a bracket 109 is installed. The bracket 109 may include a plurality of brackets surrounding the terminal 108. The bracket 109 may perform a function of protecting the terminal 108 from an external impact.

Both sides of the shell 101 are configured to be opened. The shell covers 102 and 103 may be coupled to both sides of the opened shell 101. Specifically, the shell covers 102 and 103 include a first shell cover 102 coupled to an opened side of the shell 101 and a second shell cover coupled to the opened other side of the shell 101 (103) is included. By the shell covers 102 and 103, the inner space of the shell 101 may be sealed.

Referring to FIG. 1, the first shell cover 102 may be located on the right side of the linear compressor 10, and the second shell cover 103 may be located on the left side of the linear compressor 10. . In other words, the first and second shell covers 102 and 103 may be disposed to face each other.

The linear compressor 10 further includes a plurality of pipes 104, 105, and 106 which are provided in the shell 101 or the shell covers 102 and 103 to suck, discharge, or inject a refrigerant.

In the plurality of pipes 104, 105, 106, a suction pipe 104 through which refrigerant is sucked into the linear compressor 10, a discharge pipe 105 through which compressed refrigerant is discharged from the linear compressor 10, and A process pipe 106 for replenishing the refrigerant to the linear compressor 10 is included.

For example, the suction pipe 104 may be coupled to the first shell cover 102. The refrigerant may be sucked into the linear compressor 10 along the axial direction through the suction pipe 104.

The discharge pipe 105 may be coupled to the outer peripheral surface of the shell 101. The refrigerant sucked through the suction pipe 104 may be compressed while flowing in the axial direction. In addition, the compressed refrigerant may be discharged through the discharge pipe 105. The discharge pipe 105 may be disposed closer to the second shell cover 103 than the first shell cover 102.

The process pipe 106 may be coupled to the outer peripheral surface of the shell 101. An operator may inject a refrigerant into the linear compressor 10 through the process pipe 106.

The process pipe 106 may be coupled to the shell 101 at a different height from the discharge pipe 105 in order to avoid interference with the discharge pipe 105. The height is understood as the distance in the vertical direction (or radial direction) from the leg 50. Since the discharge pipe 105 and the process pipe 106 are coupled to the outer circumferential surface of the shell 101 at different heights, operation convenience can be achieved.

At least a portion of the second shell cover 103 may be positioned adjacent to an inner circumferential surface of the shell 101 corresponding to a point where the process pipe 106 is coupled. In other words, at least a portion of the second shell cover 103 may act as a resistance of the refrigerant injected through the process pipe 106.

Accordingly, in terms of the flow path of the refrigerant, the size of the flow path of the refrigerant flowing through the process pipe 106 is reduced by the second shell cover 103 while entering the inner space of the shell 101, and passes through it. And is formed to grow again. In this process, the pressure of the refrigerant is reduced, so that the refrigerant can be vaporized, and in this process, the oil contained in the refrigerant can be separated. Accordingly, as the refrigerant from which oil is separated flows into the piston 130 (refer to FIG. 3), the compression performance of the refrigerant may be improved. The oil can be understood as the hydraulic oil present in the cooling system.

On the inner side of the first shell cover 102, a cover support portion 102a (see FIG. 3) is provided. A second support device 185 to be described later may be coupled to the cover support part 102a. The cover support part 102a and the second support device 185 may be understood as a device supporting the main body of the linear compressor 10.

Here, the main body of the linear compressor 10 refers to a component provided inside the shell 101, and may include, for example, a driving unit for reciprocating motion and a support unit supporting the driving unit.

Components such as a piston 130, a magnet 146, a supporter 137, and a muffler 150 to be described later may be included in the driving unit. In addition, the support may include components such as resonance springs 176a and 176b, rear cover 170, stator cover 149, a first support device 165 and a second support device 185 to be described later. .

A stopper 102b (refer to FIG. 3) may be provided on the inner side of the first shell cover 102. The stopper 102b prevents the body of the linear compressor 10, in particular, the motor assembly 140 from colliding with the shell 101 and being damaged due to vibration or shock generated during transport of the linear compressor 10 It is understood as a constitution.

The stopper 102b is located adjacent to the rear cover 170, which will be described later, so that when shaking occurs in the linear compressor 10, the rear cover 170 interferes with the stopper 102b, so that the motor assembly It is possible to prevent the transmission of the impact to the 140.

The inner circumferential surface of the shell 101 may be provided with a spring fastening portion 101a (see FIG. 3 ). For example, the spring fastening part 101a may be disposed at a position adjacent to the second shell cover 103. The spring fastening portion 101a may be coupled to the first support spring 166 of the first support device 165 to be described later. As the spring fastening portion 101a and the first support device 165 are coupled, the main body of the compressor can be stably supported inside the shell 101.

FIG. 2 is an exploded perspective view of a compressor body accommodated in a shell of a linear compressor according to a first embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line IV-IV' of FIG. 1.

2 and 3, the linear compressor 10 according to the first embodiment of the present invention includes a cylinder 120 provided inside the shell 101, and a reciprocating straight line inside the cylinder 120. A motor assembly 140 is included as a moving piston 130 and a linear motor that provides a driving force to the piston 130. When the motor assembly 140 is driven, the piston 130 may reciprocate in the axial direction.

Further, the linear compressor 10 further includes a suction muffler 150 coupled to the piston 130 and for reducing noise generated from the refrigerant sucked through the suction pipe 104. The refrigerant sucked through the suction pipe 104 flows into the piston 130 through the suction muffler 150. For example, while the refrigerant passes through the suction muffler 150, flow noise of the refrigerant may be reduced.

The suction muffler 150 includes a plurality of mufflers 151, 152, and 153. The plurality of mufflers includes a first muffler 151, a second muffler 152 and a third muffler 153 coupled to each other.

The first muffler 151 is located inside the piston 130, and the second muffler 152 is coupled to the rear side of the first muffler 151. In addition, the third muffler 153 may accommodate the second muffler 152 therein and may extend to the rear of the first muffler 151. From the viewpoint of the flow direction of the refrigerant, the refrigerant sucked through the suction pipe 104 may pass through the third muffler 153, the second muffler 152 and the first muffler 151 in order. In this process, the flow noise of the refrigerant can be reduced.

The suction muffler 150 further includes a muffler filter 155. The muffler filter 155 may be located at an interface where the first muffler 151 and the second muffler 152 are coupled. For example, the muffler filter 155 may have a circular shape, and an outer periphery of the muffler filter 155 may be supported between the first and second mufflers 151 and 152.

Hereinafter, the direction is defined.

The term "axial direction" may be understood as a direction in which the piston 130 reciprocates, that is, a transverse direction in FIG. 3. In the "axial direction", the direction from the suction pipe 104 toward the compression space P, that is, the direction in which the refrigerant flows is referred to as "front", and the opposite direction is defined as "rear". When the piston 130 moves forward, the compression space P may be compressed.

On the other hand, the "radial direction" is a direction perpendicular to the direction in which the piston 130 reciprocates, and can be understood as the vertical direction of FIG. 3.

The piston 130 includes a piston body 131 having a substantially cylindrical shape and a piston flange 132 extending radially from the piston body 131. The piston body 131 reciprocates within the cylinder 120, and the piston flange 132 reciprocates outside the cylinder 120.

The cylinder 120 includes a cylinder body 121 extending in the axial direction and a cylinder flange 122 provided outside the front portion of the cylinder body 121. In addition, the cylinder 120 is configured to accommodate at least a portion of the first muffler 151 and at least a portion of the piston body 131.

In the cylinder body 121, a gas inlet passage 123 (see FIG. 4) through which at least some of the refrigerants discharged through the discharge valve 161 to be described later flows is formed. The gas inlet passage 123 is formed on the outer peripheral surface of the cylinder body 121.

The gas inlet passage 123 is formed by being recessed radially inward from the outer peripheral surface of the cylinder body 121. The gas inlet passage 123 may extend in the circumferential direction of the cylinder body 121. A plurality of gas inflow passages 123 may be disposed apart from the outer peripheral surface of the cylinder body 121 in the axial direction.

A filter member 127 (refer to FIG. 5) to be described later is disposed in the gas inflow passage 123. The filter member 127 may be installed by being wound inwardly along the gas inflow passage 123.

In addition, a filter fixing member 200 (see FIG. 8) for fixing the filter member 127 is provided in the gas inflow passage 123. The filter fixing member 200 may be inserted at any point inside the gas inflow passage 123 to fix the filter member 127.

In addition, a compression space P in which the refrigerant is compressed by the piston 130 is formed inside the cylinder 120. In addition, a suction hole 133 for introducing a refrigerant into the compression space P is formed in the front portion of the piston body 131, and the suction hole 133 is selectively disposed in front of the suction hole 133. Inlet valve 135 is provided to open to the door.

In addition, a fastening hole through which a predetermined fastening member is coupled is formed in the front portion of the piston body 131. In detail, the fastening hole is located at the center of the front portion of the piston body 131, and a plurality of suction holes 133 are formed to surround the fastening hole. In addition, the fastening member passes through the suction valve 135 and is coupled to the fastening hole to fix the suction valve 135 to the front surface of the piston body 131.

In front of the compression space (P), a discharge cover (160) forming a discharge space (160a) of the refrigerant discharged from the compression space (P) and coupled to the discharge cover (160), the compression space (P) Discharge valve assemblies 161 and 163 for selectively discharging the refrigerant compressed in the are provided. The discharge space 160a includes a plurality of spaces partitioned by an inner wall of the discharge cover 160. The plurality of space portions are disposed in a front-rear direction and may communicate with each other.

The discharge valve assemblies 161 and 163 are opened when the pressure of the compression space P is equal to or higher than the discharge pressure, and the discharge valve 161 for introducing the refrigerant into the discharge space 160a of the discharge cover 160 and the A spring assembly 163 is provided between the discharge valve 161 and the discharge cover 160 to provide an elastic force in the axial direction.

The spring assembly 163 includes a valve spring 163a and a spring support part 163b for supporting the valve spring 163a to the discharge cover 160. For example, a leaf spring may be included in the valve spring 163a. In addition, the spring support part 163b may be injection-molded integrally with the valve spring 163a by an injection process.

The discharge valve 161 is coupled to the valve spring 163a, and a rear part or a rear surface of the discharge valve 161 is positioned to be supported on the front surface of the cylinder 120. When the discharge valve 161 is supported on the front surface of the cylinder 120, the compression space P is maintained in a closed state, and when the discharge valve 161 is separated from the front surface of the cylinder 120, the compression The space P is opened so that the compressed refrigerant inside the compressed space P may be discharged.

Accordingly, the compression space P is understood as a space formed between the intake valve 135 and the discharge valve 161. In addition, the suction valve 135 is formed on one side of the compression space P, and the discharge valve 161 is on the other side of the compression space P, that is, on the opposite side of the suction valve 135 Can be provided.

In the course of the piston 130 reciprocating and linear movement inside the cylinder 120, when the pressure in the compression space P is lower than the discharge pressure and less than the suction pressure, the suction valve 135 is opened and the refrigerant is It is sucked into the compression space (P). On the other hand, when the pressure in the compression space P is greater than or equal to the suction pressure, the refrigerant in the compression space P is compressed while the suction valve 135 is closed.

In addition, when the pressure in the compression space P is greater than or equal to the discharge pressure, the valve spring 163a deforms forward to open the discharge valve 161, and the refrigerant is discharged from the compression space P. , Is discharged to the discharge space (160a). When the discharge of the refrigerant is completed, the valve spring 163a provides a restoring force to the discharge valve 161 so that the discharge valve 161 is closed.

Meanwhile, the linear compressor 10 further includes a cover pipe 162a coupled to the discharge cover 160 and discharging the refrigerant flowing through the discharge space 160a of the discharge cover 160. For example, the cover pipe 162a may be made of a metal material.

Further, the linear compressor 10 further includes a loop pipe 162b coupled to the cover pipe 162a and transferring the refrigerant flowing through the cover pipe 162a to the discharge pipe 105. One side of the roof pipe 162b may be coupled to the cover pipe 162a, and the other side of the roof pipe 162b may be coupled to the discharge pipe 105.

The roof pipe 162b is made of a flexible material, and may be formed relatively long. In addition, the roof pipe 162b extends roundly along the inner circumferential surface of the shell 101 from the cover pipe 162a, and may be coupled to the discharge pipe 105. For example, the roof pipe 162b may have a wound shape.

The linear compressor 10 further includes a frame 110. The frame 110 is understood as a configuration for fixing the cylinder 120. For example, the cylinder 120 may be press-fit into the inside of the frame 110 (壓入, press fitting). In addition, the cylinder 120 and the frame 110 may be made of aluminum or aluminum alloy.

The frame 110 includes a frame body 111 having a substantially cylindrical shape and a frame flange 112 extending from the frame body 111 in a radial direction. The frame body 111 is disposed to surround the cylinder 120. That is, the cylinder 120 may be positioned to be received inside the frame body 111. In addition, the frame flange 112 may be coupled to the discharge cover 160.

In addition, a gas hole 114 for flowing at least a portion of the refrigerant discharged through the discharge valve 161 toward the cylinder 120 is formed in the frame 110. The gas hole 114 is formed to communicate with the frame flange 112 and the frame body 111.

In addition, a filter for filtering foreign substances among the refrigerant introduced into the gas hole 114 is disposed on the frame flange 112. The filter may be installed by being press-fit into an inner space formed in the frame flange 112.

The motor assembly 140 includes an outer stator 141, an inner stator 148 disposed to be spaced apart from the inner stator 141, and a space between the outer stator 141 and the inner stator 148. A magnet 146 located is included.

The magnet 146 may linearly reciprocate by mutual electromagnetic force between the outer stator 141 and the inner stator 148. Further, the magnet 146 may be configured as a single magnet having one pole, or may be configured by combining a plurality of magnets having three poles.

The inner stator 148 is fixed to the outer periphery of the frame body 111. In addition, the inner stator 148 is configured by stacking a plurality of laminations from the outside of the frame body 111 in the radial direction.

The outer stator 141 includes coil winding bodies 141b, 141c and 141d and a stator core 141a. The coil winding body includes a bobbin 141b and a coil 141c wound in the circumferential direction of the bobbin.

In addition, the coil winding body further includes a terminal part 141d for guiding the power line connected to the coil 141c to be drawn out or exposed to the outside of the outer stator 141. The terminal portion 141d may extend through the frame flange 112.

The stator core 141a includes a plurality of core blocks configured by stacking a plurality of laminations in a circumferential direction. The plurality of core blocks may be disposed to surround at least a portion of the coil winding bodies 141b and 141c.

A stator cover 149 is provided on one side of the outer stator 141. In this case, one side of the outer stator 141 may be supported by the frame flange 112 and the other side may be supported by the stator cover 149. In summary, the frame flange 112, the outer stator 141, and the stator cover 149 are sequentially positioned in the axial direction.

In addition, the linear compressor 10 further includes a cover fastening member 149a for fastening the stator cover 149 and the frame flange 112. The cover fastening member 149a passes through the stator cover 149 and extends forward toward the frame flange 112 and may be coupled to the frame flange 112.

In addition, the linear compressor 10 further includes a rear cover 170 coupled to the stator cover 149 and extending rearward, and supported by a second support device 185.

In detail, the rear cover 170 includes three support legs, and the three support legs may be coupled to the rear surface of the stator cover 149. A spacer 181 may be interposed between the three support legs and the rear surface of the stator cover 149. By adjusting the thickness of the spacer 181, a distance from the stator cover 149 to the rear end of the rear cover 170 may be determined.

In addition, the linear compressor 10 further includes an inlet guide part 156 coupled to the rear cover 170 to guide the refrigerant inflow into the suction muffler 150. At least a portion of the inlet guide part 156 may be inserted into the suction muffler 150.

In addition, the linear compressor 10 further includes a plurality of resonance springs 176a and 176b whose natural frequencies are adjusted so that the piston 130 can perform a resonance motion. By the action of the plurality of resonance springs 176a and 176b, a stable movement of the driving unit reciprocating within the linear compressor 10 is performed, and generation of vibration or noise caused by the movement of the driving unit may be reduced.

Further, the linear compressor 10 further includes a first supporting device 165 coupled to the discharge cover 160 and supporting one side of the main body of the compressor 10. The first support device 165 is disposed adjacent to the second shell cover 103 to elastically support the main body of the compressor 10. Specifically, the first support device 165 includes a first support spring 166. The first support spring 166 may be coupled to the spring fastening portion 101a.

In addition, the linear compressor 10 further includes a second support device 185 coupled to the rear cover 170 and supporting the other side of the main body of the compressor 10. The second support device 185 may be coupled to the first shell cover 102 to elastically support the main body of the compressor 10. Specifically, the second support device 185 includes a second support spring 186. The second support spring 186 may be coupled to the cover support part 102a.

In addition, the linear compressor 10 includes a plurality of sealing members for increasing the coupling force between the frame 110 and parts around the frame 110. The plurality of sealing members may have a ring shape.

Specifically, the plurality of sealing members includes a first sealing member 127 provided at a portion where the frame 110 and the discharge cover 160 are coupled. In addition, the plurality of sealing members, the second and third sealing members (128, 129a) provided in the portion where the frame 110 and the cylinder 120 are coupled, and the frame 110 and the inner stator 148 A fourth sealing member 129b provided in the portion to which the is coupled is further included.

Hereinafter, a filter fixing member according to the present invention will be described in detail with reference to the drawings.

4 is a perspective view of a cylinder according to a first embodiment of the present invention, FIG. 5 is a view showing a state in which a filter member is disposed in a seating groove of the cylinder according to the first embodiment of the present invention, and FIG. 6 is It is a diagram showing a cross section cut along II-II' of.

4 to 6, the linear compressor 10 includes a cylinder 120 and a filter member 127 wound around the outer circumferential surface of the cylinder 120.

The cylinder 120 includes a cylinder body 121 and a cylinder flange 122 provided outside the front portion of the cylinder body 121.

The cylinder body 121 may be elongated in a horizontal direction or an axial direction, and may have a hollow cylindrical shape. Both ends of the cylinder body 121 are opened, and a predetermined internal space is formed. In addition, the piston 130 is disposed inside the cylinder body 121, and the frame 110 is disposed outside the cylinder body 121.

In addition, the cylinder 120 further includes a gas inlet passage 123.

The gas inflow passage 123 is a space through which some of the refrigerant flows into the cylinder 120. In this embodiment, some of the refrigerant discharged through the discharge valve 161 flows into the gas hole 114 formed in the frame 110, and the refrigerant introduced into the gas hole 114 flows into the gas. The outer circumferential surface of the cylinder 120 may flow along the flow path 123.

Specifically, the gas inlet passage 123 is recessed radially inward from the outer peripheral surface of the cylinder body 121. That is, the gas inlet passage 123 may extend from an outer peripheral surface of the cylinder body 121 toward an inner peripheral surface.

In addition, the gas inlet passage 123 may extend in the circumferential direction of the cylinder body 121. For example, the gas inlet passage 123 may be formed in a circular strip shape on the outer circumferential surface of the cylinder body 121.

Here, the gas inlet passage 123 may have a predetermined first width W1 and may be formed to be recessed to a first depth D1. The "width" may mean a length extending in the axial direction of the cylinder 120. The "depth" may mean a length extending in the radial direction of the cylinder 12.

A plurality of gas inflow passages 123 may be disposed apart from the outer peripheral surface of the cylinder body 121 in the axial direction. In this embodiment, two gas inlet passages 123 are formed on the outer circumferential surface of the cylinder body 121, but the present invention is not limited thereto. For example, the number of gas inlet passages 123 may be provided on the outer circumferential surface of the cylinder body 121 in a single number or three or more.

A filter member 127 to be described later is disposed in the gas inflow passage 123. The filter member 127 may be wound and installed inside the gas inlet passage 123.

In addition, the cylinder 120 further includes a gas inlet 124 penetrating from the gas inlet passage 123 to the inner circumferential surface of the cylinder 120.

The gas inlet 124 is understood as a passage through which the refrigerant flowing through the gas inlet passage 123 flows into the cylinder 120. The gas inlet 124 penetrates from the inner surface of the gas inlet passage 123 toward the inside of the cylinder 120. For example, the gas inlet 124 may be formed to penetrate from an inner bottom surface of the gas inlet passage 123 to an inner peripheral surface of the cylinder 120.

In addition, a plurality of gas inlets 124 may be formed to be spaced apart from each other along the circumferential direction of the gas inlet passage 123. Accordingly, the refrigerant introduced into the gas inlet passage 123 flows along the circumferential surface of the gas inlet passage 123 and then flows evenly into the cylinder 120 through the gas inlet port 124. I can.

In addition, the cylinder 120 further includes a seating groove 125 in which a filter fixing member 200 to be described later is seated.

The seating groove 125 is formed by being further recessed in the radial direction of the cylinder 120 in the gas inflow passage 123. In addition, the seating groove 125 may be formed to extend further in the axial direction from the gas inlet passage 123.

That is, the seating groove 125 may have a second width W2 that is greater than the first width W1 and may be formed by being recessed to a second depth D2 that is greater than the first depth D1.

With this configuration, when the filter member 127 is disposed inside the gas inlet passage 123, the bottom surface 125a of the mounting groove 125 and the mounting surface 127a of the filter member 127 Can be spaced apart. That is, the bottom surface 125a of the mounting groove 125 and the mounting surface 127a of the filter member 127 may be spaced apart by a predetermined distance L1 in the radial direction of the cylinder 120.

The seating groove 125 is a portion in which the filter fixing member 200, which will be described later, is seated. A part of the filter member 127 is placed in the seating groove 125, and the filter fixing member 200 may fix a part of the filter member 127.

In addition, a plurality of seating grooves 125 may be disposed inside the gas inlet passage 123. For example, a plurality of seating grooves 125 may be spaced apart from each other in the gas inlet passage 123 along the circumferential direction.

In this case, the plurality of seating grooves 125 may be disposed between the plurality of gas holes 124 formed along the circumferential direction of the cylinder 120. For example, the seating groove 125 and the gas hole 124 may be alternately disposed.

Accordingly, since a plurality of filter fixing members 200 may be provided along the circumferential direction of the gas inflow passage 123, the filter member 127 may be firmly fixed to the cylinder 120.

The filter member 127 is provided by being wound on the inside of the gas inflow passage 123. The filter member 127 includes a thread formed of a polyethylene terephtahalate (PET) material. The filter member 127 may be understood as a “thread filter”. In addition, the filter member 127 may be wound a plurality of times along the gas inlet passage 123 to be used as a precipitation filter.

The filter member 127 is provided in close contact with the inner surface of the gas inflow passage 123. In addition, a part of the filter member 127 may be exposed by a seating groove 125 formed in the gas inflow passage 123. That is, a part of the filter member 127 may be spaced apart from the inner surface or the bottom surface 125a of the mounting groove 125.

7 is a perspective view of a filter fixing member according to a first embodiment of the present invention, and FIG. 8 is a view showing a state in which the filter fixing member according to the first embodiment of the present invention is disposed in a mounting groove of a cylinder, and FIG. 9 Is a diagram showing a cross-section taken along III-III' of FIG. 8.

7 to 9, the linear compressor 10 further includes a filter fixing member 200 that fixes the filter member 127 to the cylinder 120.

The filter fixing member 200 is a member that is seated in the mounting groove 125 formed in the cylinder 120 to fix the filter member 127. At least one filter fixing member 200 may be provided in the gas inflow passage 123 to fix the filter member 127.

In this embodiment, the filter fixing member 200 may be formed of a metal material or an engineering plastic material.

Specifically, the filter fixing member 200 includes a cover part 210 that is accommodated in the seating groove 125 and covers the filter member 127, and the seating portions 220 and 230 that are seated in the seating groove 125. ) Is included.

The cover part 210 is elongated in the axial direction and may be formed in a rod shape, for example. The cover part 210 is disposed to shield at least a part of the seating groove 125.

In this case, the cover part 210 may be disposed in the seating groove 125 to pressurize the filter member 127 to be in close contact with the inside of the cylinder 120. That is, when the filter fixing member 200 is seated in the seating groove 125, the cover part 210 and the filter member 127 may contact.

The seating portions 220 and 230 extend from both ends of the cover portion 210 and are seated on the inner side of the seating groove 125. The seating portions 220 and 230 may extend in the same direction from the cover portion 210 and may have a symmetrical structure.

Specifically, the seating portions 220 and 230 have a first seating portion 220 extending radially inward of the cylinder 120 from one end of the cover portion 210 and the other end of the cover portion 210 A second seating portion 230 extending radially inwardly from the cylinder 120 is included.

That is, the first seating portion 220 and the second seating portion 230 may be understood as extending from the cover portion 210 toward the seating groove 125.

The first and second seating portions 220 and 230 are in close contact with the inner surface of the seating groove 125. The first and second seating portions 220 and 230 are inserted into the seating groove 125 so that the cover portion 210 presses the filter member 127.

That is, when the first and second seating portions 220 and 2230 are inserted into the seating groove 125, the cover portion 210 presses the filter member 127 to the inside of the cylinder 120, A part of the filter member 127 may be pressed into the seating groove 125. Accordingly, the filter member 127 may be strongly supported by the cylinder 120 and tension may be maintained.

In addition, the filter member 127 may be pressurized by the cover part 210 while being pressed into the outer circumferential surface of the cylinder 120, that is, inside the gas inlet passage 123. In this case, a part of the filter member 127 exposed to the inside of the seating groove 125 may be in close contact with the inside of the seating groove 125 by pressing the cover part 210.

That is, a portion of the filter member 127 may contact the bottom surface 125a of the mounting groove 125. With this configuration, the filter member 127 may be prevented from being separated from the cylinder 120 or being idle.

In addition, the first and second seating portions 220 and 230 may have a semicircular shape.

In this embodiment, the first seating portion 220 and the second seating portion 230 may be formed in a semi-cylindrical shape having a symmetrical structure. That is, the first seating portion 220 extends to have a semicircular cross-section in front of the cover portion 210, and the second seating portion 230 is a semi-circular cross-section from the rear of the cover portion 210 Is extended to have

At this time, the first mounting portion 220 includes a first surface 220a forming a plane and a second surface 220b forming a curved surface, and the second mounting portion 230 forms a plane. A first surface 230a and a second surface 230b forming a curved surface may be included.

In addition, the first surfaces 220a and 230a of the first and second seating portions 220 and 230 are disposed to face each other, and the second surfaces 220b and 230b of the first and second seating portions 220 and 230 are It can be convexly rounded in the opposite direction.

Meanwhile, in the present embodiment, the first and second seating portions 220 and 230 are described as being formed in a semicircular or semi-cylindrical shape, but the present invention is not limited thereto.

For example, the first and second seating portions 220 and 230 may be formed in a hexahedral or polyhedral shape. That is, in various embodiments, the first and second seating portions 220 and 230 may be formed to extend in a hexahedral or polyhedral shape from both ends of the cover part 210, respectively. In this case, the shape of the seating groove 125 may be formed to correspond to the shape of the first and second seating portions 220 and 230.

10 is a perspective view of a filter fixing member according to a second embodiment of the present invention, and FIG. 11 is a cross-sectional view showing a state in which the filter fixing member according to the second embodiment of the present invention is disposed in a mounting groove of a cylinder.

This embodiment is the same as the first embodiment in other parts, except that there is a difference in the structure of the filter fixing member. Therefore, hereinafter, only characteristic parts of the present embodiment will be described, and the same parts as those of the first embodiment will be used.

10 and 11, the linear compressor 10 according to the second embodiment includes a cylinder 120, a filter member 127 wound around the outer circumferential surface of the cylinder 120, and the filter member 127. It includes a filter fixing member 300 to fix.

Since the cylinder 120 and the filter member 127 are the same as the first embodiment described above, detailed descriptions of the cylinder 120 and the filter member 127 will be omitted.

The filter fixing member 300 is seated in the mounting groove 125 formed in the cylinder 120 to fix the filter member 127. At least one filter fixing member 300 may be provided in the gas inflow passage 123 to fix the filter member 127.

Specifically, the filter fixing member 300 includes a cover part 310 that covers a part of the filter member 127, and is formed on both sides of the cover part 310 and is inserted into the mounting groove 125. Parts 320 and 330 are included.

The cover part 310 is elongated in the axial direction and may be formed in a rod shape, for example. The cover part 310 is disposed to shield at least a part of the seating groove 125.

In this case, the cover part 310 may be disposed in the seating groove 125 and pressurize the filter member 127 to be in close contact with the inside of the cylinder 120. That is, when the filter fixing member 300 is seated in the seating groove 125, the cover part 310 and the filter member 127 may contact each other.

The seating portions 320 and 330 are respectively extended from both ends of the cover portion 310 and inserted into the inner surface of the seating groove 125.

In particular, the seating portions 320 and 330 are formed to have a rounded outer side at both ends of the cover portion 310. The seating portions 320 and 330 have a structure symmetrical to each other, and may be formed in a fan shape as an example.

Specifically, the seating portions 320 and 330 have a first seating portion 320 formed to be rounded at one end of the cover portion 310, and a second seating portion 320 formed to be rounded at the other end of the cover portion 310. A seating portion 330 is included.

The first and second seating portions 320 and 330 are portions that are in close contact with the inner surface of the seating groove 125. The first and second seating portions 320 and 330 are inserted into both inner surfaces of the seating groove 125 so that the cover portion 310 presses the filter member 127.

In this case, the filter member 127 may be pressurized by the cover part 310 while being press-fitted into the gas inlet passage 123. Then, a part of the filter member 127 exposed to the inside of the seating groove 125 is in close contact with the inside of the seating groove 125 by the pressure of the cover part 310, whereby the filter member The tension of (127) can be maintained.

With this configuration, the filter member 127 may be prevented from being separated from the cylinder 120 or being idle.

12 is a perspective view of a cylinder according to a third embodiment of the present invention, and FIG. 13 is a perspective view of a filter fixing member according to a third embodiment of the present invention.

This embodiment is the same as the first embodiment in other parts, except that there is a difference in the structure of the filter fixing member. Therefore, hereinafter, only characteristic parts of the present embodiment will be described, and the same parts as those of the first embodiment will be used.

12 and 13, the linear compressor 10 according to the third embodiment includes a cylinder 1200, a filter member 1270 wound around the outer circumferential surface of the cylinder 1200, and the filter member 1270. A filter fixing member 400 for fixing is included.

Since the cylinder 1200 and the filter member 1270 are very similar to the first embodiment described above, detailed descriptions of the cylinder 1200 and the filter member 1270 will be omitted.

The filter fixing member 400 is seated in a mounting groove 1250 formed in the cylinder 1200 to fix the filter member 1270. At least one filter fixing member 400 may be provided in a gas inflow passage 1230 formed in the cylinder 1200 to fix the filter member 1270.

Specifically, the filter fixing member 400 includes a plate 410 seated in the seating groove 1250 and a pair of extension portions 420 and 430 formed on both sides of the plate 410.

In this case, the plate 410 and/or the pair of extension portions 420 and 430 may be formed of a material capable of plastic deformation. For example, the filter fixing member 400 may be integrally formed of a plastic material capable of plastic deformation.

The plate 410 is mounted on the inner side of the mounting groove 1250 and, for example, may have a rectangular shape. The plate 410 may have an area corresponding to the bottom surface of the seating groove 1250. Accordingly, the plate 410 may be disposed to cover all of the bottom surface of the seating groove 1250.

The pair of extension portions 420 and 430 are respectively extended from both ends of the plate 410 and disposed on the inner side of the seating groove 1250.

In particular, the pair of extension portions 420 and 430 may extend radially outward of the cylinder 1200 from both ends of the plate 410. For example, the pair of extension parts 420 and 430 may extend at an angle perpendicular to the plate 410 at both ends of the plate 410.

Specifically, the pair of extension portions 420 and 430 include a first extension portion 420 formed vertically at one end of the plate 410, and a second extension portion 420 formed vertically at the other end of the plate 410. An extension 430 is included.

The first and second extension parts 420 and 430 are in close contact with the inner surface of the seating groove 1250. The first and second extension parts 420 and 430 may be plastically deformed after being inserted into the seating groove 1250 to press the filter member 1270.

Hereinafter, a method of installing a filter fixing member according to a fourth embodiment will be described in detail with reference to the drawings.

14A is a cross-sectional view taken along VI-VI' of FIG. 12, FIG. 14B is a cross-sectional view showing a filter fixing member disposed in a seating groove of a cylinder in FIG. 14A, and FIG. 14C is a filter in a seating groove in FIG. 14B. A cross-sectional view showing the arrangement of the member, and FIG. 14D is a cross-sectional view showing a state in which the filter member is fixed by the filter fixing member in FIG. 14C.

First, as shown in FIGS. 14A and 14B, the filter fixing member 400 is mounted in the mounting groove 1250 of the cylinder 1200. In this case, the filter fixing member 400 may be press-fitted into the seating groove 1250 to be fixed.

When the filter fixing member 400 is mounted in the mounting groove 1250, the plate 410 of the filter fixing member 400 may cover all the bottom surfaces of the mounting groove 1250. Further, the extension portions 420 and 430 of the filter fixing member 400 may be in close contact with both inner surfaces of the mounting groove 1250, respectively.

Next, as shown in FIG. 14C, the filter member 1270 is disposed in the gas inlet passage 1230 formed in the cylinder 1200.

Specifically, the filter member 1270 is wound and installed in a circumferential direction along the gas inlet passage 1230. Then, a part of the filter member 1270 is exposed by the seating groove 1250. In other words, a portion of the filter member 1270 is placed in a state spaced apart from the bottom surface of the seating groove 1250.

In this case, a part of the filter member 1270 is disposed inside the filter fixing member 400. That is, a portion of the filter member 1270 may be disposed above the plate 410 or outside the radial direction.

When the installation of the filter member 1270 is completed, both sides of the filter fixing member 400 are pressed or bent to press the filter member 1270.

Specifically, the pair of extension portions 420 and 430 of the filter fixing member 400 are bent in an inward direction or in a direction closer to each other. Then, the pair of extension parts 420 and 430 may be bent in a direction in close contact with the filter member 1270 through plastic deformation.

That is, by pressing the upper portion of the filter member 1270 located inside the filter fixing member 400 by the pair of extension parts 420 and 430, the filter member 1270 may be fixed. Accordingly, the filter member 1270 may be strongly fixed to the cylinder 1200 by being in close contact with the outer surface of the plate 410 and being pressed by the pair of extension parts 420 and 430. By this configuration, the tension of the filter member 1270 is maintained, and a phenomenon in which the filter member 1270 is separated from the cylinder 1200 to the outside or turned away can be prevented.

15 is a perspective view of a filter fixing member according to a fourth embodiment of the present invention, FIG. 16A is a cross-sectional view showing a seating groove of a cylinder according to a fourth embodiment of the present invention, and FIG. 16B is a filter in the seating groove in FIG. 16A. A cross-sectional view showing a state in which the fixing member is disposed, FIG. 16C is a cross-sectional view showing a state in which the filter member is disposed in the seating groove in FIG. 16B, and FIG. 16D is a diagram illustrating a state in which the filter member is fixed by the filter fixing member in FIG. It is a cross-sectional view.

This embodiment is the same as the third embodiment in other parts, except that there is a difference in the structure of the filter fixing member. Therefore, hereinafter, only characteristic parts of the present embodiment will be described, and the same parts as those of the third embodiment will be used.

15 and 16, the linear compressor 10 according to the fourth embodiment includes a cylinder 1200, a filter member 1270 wound around the outer circumferential surface of the cylinder 1200, and the filter member 1270. A filter fixing member 500 to be fixed is included.

Since the cylinder 1200 and the filter member 1270 are the same as in the third embodiment described above, detailed descriptions of the cylinder 1200 and the filter member 1270 will be omitted.

The filter fixing member 500 is seated in a mounting groove 1250 formed in the cylinder 1200 to fix the filter member 1270. At least one filter fixing member 500 may be provided in the gas inflow passage 1230 formed in the cylinder 1200 to fix the filter member 1270.

Specifically, the filter fixing member 500 includes a plate 510 that is seated inside the seating groove 1250 and an extension part 520 extending from the plate 510 to one side.

In this case, the plate 510 and/or the extension part 520 may be formed of a material capable of plastic deformation. For example, the filter fixing member 500 may be integrally formed of a plastic material capable of plastic deformation.

The plate 510 is seated in the mounting groove 1250 and, for example, may have a rectangular shape. The plate 510 may have an area corresponding to the bottom surface of the mounting groove 1250. Accordingly, the plate 510 may be disposed to cover all of the bottom surface of the seating groove 1250.

The extension part 520 extends upward from the end of the plate 510 and is disposed on the inner surface of the seating groove 1250.

In particular, the extension part 520 may extend radially outward of the cylinder 1200 from one end of the plate 510. For example, the extension part 520 may extend in a direction perpendicular to the plate 510 at one end of the plate 510. In this case, the width of the extension part 520 may be formed equal to the width of the plate 510.

The extension part 520 is a portion that is in close contact with the inner surface of the seating groove 1250. The extension part 520 may be plastically deformed after being inserted into the seating groove 1250 to press the filter member 1270.

Hereinafter, a method of installing a filter fixing member according to a fourth embodiment will be described in detail with reference to the drawings.

First, as shown in FIGS. 16A and 16B, the filter fixing member 500 is mounted in the mounting groove 1250 of the cylinder 1200. In this case, the plate 510 of the filter fixing member 500 may be press-fitted into the seating groove 1250 to be fixed.

When the filter fixing member 500 is mounted in the mounting groove 1250, the plate 510 of the filter fixing member 500 may cover all the bottom surfaces of the mounting groove 1250. In addition, the extension part 520 of the filter fixing member 500 may be in close contact with the inner surface of the mounting groove 1250.

Next, as shown in FIG. 16C, the filter member 1270 is installed in the gas inlet passage 1230 formed in the cylinder 1200.

Specifically, the filter member 1270 is wound and installed in a circumferential direction along the inside of the gas inlet passage 1230. Then, a part of the filter member 1270 is exposed by the seating groove 1250. In other words, a portion of the filter member 1270 is placed in a state spaced apart from the bottom surface of the seating groove 1250.

In this case, a part of the filter member 1270 is disposed inside the filter fixing member 500. That is, a portion of the filter member 1270 may be disposed above the plate 510 or outside the radial direction.

When the installation of the filter member 1270 is completed, one side of the filter fixing member 500 is pressed to press the filter member 1270.

Specifically, the extension portion 520 of the filter fixing member 500 is bent in an inward direction or in a direction folded to the plate 510. Then, the extension part 520 may be bent in a direction in close contact with the filter member 1270 through plastic deformation.

The extension part 520 fixes the filter member 1270 by pressing a part of the filter member 1270 located inside the filter fixing member 500. Accordingly, the filter member 1270 may be strongly fixed to the cylinder 1200 by being in close contact with the outer surface of the plate 510 and being pressed by the extension part 520. Accordingly, the tension of the filter member 1270 is maintained, and a phenomenon in which the filter member 1270 is separated from the cylinder 1200 to the outside or is not idle can be prevented.

Claims (15)

A piston reciprocating in the axial direction;
A cylinder installed to receive the piston;
A gas inlet passage recessed radially inward from the outer peripheral surface of the cylinder;
A seating groove further recessed radially inward in the gas inlet passage;
A filter member disposed in the gas inlet passage; And
A linear compressor that is inserted into the seating groove and includes a filter fixing member that presses the filter member into the cylinder. The method of claim 1,
The filter fixing member is a linear compressor that presses a part of the filter member to be in close contact with the bottom surface of the seating groove. The method of claim 1,
The gas inflow passage extends along the circumferential direction of the cylinder,
The filter member is installed by being wound in a circumferential direction along the gas inlet passage. The method of claim 3,
The seating groove is formed by being further depressed in the axial direction in the gas inlet passage. The method of claim 4,
In the filter fixing member,
A cover part accommodated in the seating groove and covering a part of the filter member;
A first seating portion extending from the cover portion and seated inside the seating groove; And
A linear compressor extending from the cover portion and including a second seating portion seated in the seating groove. The method of claim 5,
The first seating portion extends from one end of the cover portion to the inside of the seating groove,
The second seating portion is a linear compressor extending from the other end of the cover portion to the inside of the seating groove. The method of claim 5,
A linear compressor in which a portion of the filter member is disposed between the first seating portion and the second seating portion. The method of claim 6,
Each of the first seating portion and the second seating portion includes a first surface forming a plane and a second surface forming a curved surface,
Each of the first surfaces are disposed to face each other, and each second surface is convexly rounded toward opposite directions. The method of claim 1,
A linear compressor including a thread formed of a polyethylene terephtahalate (PET) material in the filter member. The method of claim 1,
The filter fixing member is a linear compressor formed of an engineering plastic material. The method of claim 4,
In the filter fixing member,
A cover part accommodated in the seating groove and covering a part of the filter member; And
Both ends of the cover portion are formed to be rounded, respectively, the linear compressor comprising a seating portion inserted into both sides of the seating groove. The method of claim 4,
In the filter fixing member,
A plate seated on the inside of the seating groove; And
A linear compressor including an extension part extending upward from the plate and plastically deformed to cover a part of the filter member. The method of claim 12,
The plate is in close contact with the bottom surface of the seating groove,
The extension part is a linear compressor that is in close contact with the inner surface of the seating groove. The method of claim 12,
The linear compressor is formed to have the same width as that of the plate. The method of claim 12,
In the extension,
A first extension part extending upward from one end of the plate; And
Includes a second extension extending upward from the other end of the plate,
The first extension part and the second extension part are plastically deformed in a direction closer to each other and are in close contact with the filter member.

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