KR101990142B1 - Linear compressor - Google Patents

Abstract

The present invention relates to a linear compressor. According to an embodiment of the present invention, the linear compressor comprises: a shell; a compressor main body disposed in the shell; and a damping member disposed between the shell and the compressor main body. The damping member comprises: a first surface having a first contact part coming in contact with an inner surface of the shell; and a second surface having a second contact part coming in contact with an outer surface of the compressor main body and facing the first surface.

Description

[0001] Linear compressor [0002]

The present invention relates to a linear compressor.

Generally, a compressor is a mechanical device that receives power from a power generating device such as an electric motor or a turbine to increase pressure by compressing air, refrigerant or various other operating gases. .

These compressors are roughly divided into a reciprocating compressor, a rotary compressor, and a scroll compressor according to a compression method of a working fluid.

In the reciprocating compressor, a compression space in which an operating gas is sucked or discharged is formed between a piston and a cylinder, and the piston linearly reciprocates within the cylinder to compress the refrigerant.

In addition, the rotary compressor has a compression space in which a working gas is sucked or discharged between a roller and a cylinder that are eccentrically rotated, and the roller compresses the refrigerant while eccentrically rotating along the inner wall of the cylinder.

In addition, the scroll compressor has a compression space formed between an orbiting scroll and a fixed scroll to suck or discharge an operation gas, and the orbiting scroll rotates along the fixed scroll to compress the refrigerant.

In recent years, a linear compressor has been developed in which the piston is directly connected to a driving motor that reciprocates linearly in the reciprocating compressor, and the compression efficiency can be improved without mechanical loss due to motion switching, and is configured with a simple structure.

Normally, in a linear compressor, a piston is linearly reciprocated in a cylinder by a linear motor in a closed shell, and sucks the refrigerant, compresses it, and then discharges it.

The linear motor includes a stator and a mover or rotor. The stator includes an inner stator and an outer stator, and a coil for generating an induction magnetic field is provided on one of the inner stator and the outer stator.

And the mover is driven to reciprocate linearly in accordance with the direction of the magnetic flux generated when a current flows through the coil. As the mover is driven in the state of being connected to the piston, the piston reciprocates linearly in the cylinder while sucking the refrigerant, compressing the refrigerant, and discharging the refrigerant.

Regarding a conventional linear compressor, the present applicant has been registered by applying a patent application (hereinafter referred to as a prior art document).

[Prior Art]

1. Application No. 10-2014-0078762, filed on June 26, 2014, entitled " Linear compressor

2. Application No. 10-2014-0091881, filed on July 21, 2014, entitled " Linear compressor

As described in the above-mentioned [Prior Art], the linear compressor is generally disposed apart from the shell forming the outer appearance of the compressor body including the reciprocating linear motion actuator. In detail, a leaf spring for supporting the compressor main body is provided inside the shell to separate the compressor main body from the shell.

However, such a disposition causes a problem that a spacing space is generated and the compressor becomes large in size as a whole. Also, as the size of the compressor increases, the size of the installation space must be relatively large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a miniaturized and simplified linear compressor.

It is another object of the present invention to provide a linear compressor in which vibration by a driving unit is prevented from being transmitted to a shell, thereby reducing noise.

In particular, it is an object of the present invention to provide a linear compressor in which a plurality of damping members are provided between a compressor main body including the drive unit and the shell, and noise transmitted to the shell from the compressor main body is reduced.

According to an aspect of the present invention, a linear compressor includes a shell, a compressor body disposed inside the shell, and a damping member disposed between the shell and the compressor body, wherein the damping member has a first A first surface having a contact portion, and a second surface having a second contact portion in contact with an outer surface of the compressor body, the second surface being opposed to the first surface.

The damping member may be formed such that the first surface and the second surface are bent in at least one curvature. Particularly, the damping member is provided in a rod-like shape having a cross section in a direction perpendicular to the first surface and the second surface, and the cross section of the damping member may be formed into a shape bent at least at one curvature.

At this time. The minimum distance between the first surface and the second surface may be less than the minimum distance between the inner surface of the shell and the outer surface of the compressor body. As the minimum distance between the inner surface of the shell and the outer surface of the compressor body changes, the at least one curvature can be changed.

For example, the damping member may be formed with a plurality of concavities and convexities that bend the first surface and the second surface. The plurality of concave-convex portions may include a first concave-convex portion forming the first contact portion and a second concave-convex portion forming the second contact portion. At this time, a plurality of the first irregular portion and the second irregular portion may be provided, and they may be arranged to be crossed with each other.

Also, for example, the first contact portion of the damping member may be located on one side of the damping member, and the second contact portion may be located on the other side of the damping member. The damping member may further include a bending portion formed between the first contact portion and the second contact portion and bending the first surface and the second surface to one side. At this time, the area of the first contact portion may be smaller than the area of the second contact portion.

The damping member may include a first damping member disposed between the shell and the compressor body in a radial direction perpendicular to the axial direction, And a second damping member disposed between the shell and the compressor body in the direction of the first damping member.

At this time, the first damping member may extend in the axial direction, and a plurality of the first damping members may be disposed in the circumferential direction of the compressor main body. The second damping member may extend in the radial direction, and a plurality of the second damping members may be disposed in the circumferential direction of the compressor body. Further, the damping member may further include a ring-shaped connecting portion connecting the plurality of second damping members.

According to the present invention, since the distance between the compressor body and the shell is kept relatively small, the overall size of the compressor can be reduced and the configuration can be simplified.

Accordingly, the number of components, manufacturing cost, and manufacturing time can be reduced, and the degree of freedom of installation is increased.

Further, since the damping member is provided between the compressor main body and the shell, there is an advantage that the vibration transmitted to the shell due to the driving of the compressor main body can be reduced.

Particularly, the damping member is disposed in the radial direction and the axial direction between the compressor main body and the shell, respectively, so that vibration can be more effectively reduced.

In addition, since the damping member is formed in a curved shape having at least one curvature, the at least one curvature changes according to the vibration and the vibration can be relatively easily reduced.

1 is a schematic view illustrating an internal configuration of a linear compressor according to an embodiment of the present invention.
Fig. 2 is a view showing part A of Fig. 1. Fig.
3 is a view illustrating a first damping member installed in a linear compressor according to an embodiment of the present invention.
Fig. 4 is a view showing part B of Fig. 1. Fig.
5 is a view illustrating a second damping member installed in a linear compressor according to an embodiment of the present invention.
6 is a view showing a comparison of noise between a linear compressor and a conventional linear compressor according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

1 is a schematic view illustrating an internal configuration of a linear compressor according to an embodiment of the present invention.

Referring to FIG. 1, a linear compressor 10 according to an embodiment of the present invention may include a shell 101 forming an outer shape and having an inner space. At least one side of the shell 101 may be configured to be open. In FIG. 1, one side is shown as an open structure, but this is an example, and the shell 101 can be opened on both sides.

Further, on one side of the opened shell 101, a shell cover 102 can be coupled. In a broad sense, the shell cover 102 can be understood as a constitution of the shell 101. By the shell cover 102, the inner space of the shell 101 can be sealed.

A structure (not shown) may be provided on the outer side of the shell 101 so as to be coupled to the base of the product in 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 the air conditioner, and the base may include a base of the outdoor unit.

The linear compressor 10 further includes a pipe provided in the shell 101 or the shell cover 101 and capable of sucking, discharging or injecting refrigerant. The pipe includes a suction pipe (104) for allowing refrigerant to be sucked into the linear compressor (10). Further, a discharge pipe (not shown) may be included to allow the compressed refrigerant to be discharged from the linear compressor 10.

For example, the suction pipe 104 may be coupled to the shell cover 102. The refrigerant can be sucked into the linear compressor (10) along the axial direction through the suction pipe (104). In this case, the axial direction can be understood as a lateral direction in FIG. 1, and corresponds to a direction in which a driving unit described later rotates.

In addition, the refrigerant sucked through the suction pipe 104 can be compressed while flowing in the axial direction. The compressed refrigerant can be discharged through the discharge pipe. At this time, the inner space of the shell 101 is filled with the refrigerant sucked through the refrigerant sucked through the suction pipe 104, so that the suction pressure can be formed.

In addition, a compressor body 100 is provided inside the shell 101. Here, the compressor main body 100 refers to various components including a driving unit provided inside the shell 101. [ FIG. 1 is a schematic view of the linear compressor 10, and the compressor body 100 may further include various devices.

The compressor main body 100 is provided with a cylinder 120 provided in the shell 101, a piston 130 reciprocally linearly moving in the cylinder 120, The motor assembly 140 is included as a linear motor. When the motor assembly 140 is driven, the piston 130 may reciprocate in the axial direction.

The compressor 10 further includes a suction muffler 135 connected to the piston 130 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 135. For example, in the course of the refrigerant passing through the suction muffler 135, the flow noise of the refrigerant can be reduced.

Hereinafter, the directions are defined for convenience of explanation.

The term "axial direction" can be understood as a direction in which the piston 130 reciprocates, that is, a lateral direction in FIG. The direction from the suction pipe 104 to the compression space P described later, that is, the direction in which the refrigerant flows, is referred to as "forward ", and the opposite direction is defined as" rear " . For example, when the piston 130 moves forward, the compression space P can be compressed.

On the other hand, "radial direction" can be understood as a direction perpendicular to the direction in which the piston 130 reciprocates, and in the longitudinal direction of Fig.

A compression space P in which the refrigerant is compressed by the piston 130 is formed in the cylinder 120. A suction hole (not shown) for introducing a refrigerant into the compression space P is formed in a front portion of the piston 130. A suction valve (not shown) for opening and closing the suction hole is provided in front of the suction hole (132) is provided.

In addition, the compressor 10 includes a discharge cover 150 and a discharge valve 152. The discharge cover 150 is disposed in front of the compression space P to form a discharge space 151 for the refrigerant discharged from the compression space P. [ The discharge space 151 includes a plurality of spaces defined by inner walls of the discharge cover 150. The plurality of space portions are arranged in the front-rear direction and can communicate with each other.

The discharge valve 152 is coupled to the discharge cover 150 and selectively discharges refrigerant compressed in the compression space P. In particular, the discharge valve 152 is opened when the pressure in the compression space P is equal to or higher than the discharge pressure, and the refrigerant can be introduced into the discharge space 151.

Further, a spring assembly (not shown) may be further provided between the discharge valve 152 and the discharge cover 150 to provide an elastic force to the discharge valve 152 in the axial direction. Due to the elastic force, the discharge valve 152 is closed so that the refrigerant can be prevented from flowing into the discharge space 151.

In addition, the rear portion or the rear surface of the discharge valve 152 is positioned so as to be supported on the front surface of the cylinder 120. When the discharge valve 152 is supported on the front surface of the cylinder 120, the compression space P is maintained in a closed state. When the discharge valve 152 is separated from the front surface of the cylinder 120, The space P is opened so that the compressed refrigerant in the compression space P can be discharged.

Therefore, the compression space P is understood as a space formed between the suction valve 132 and the discharge valve 152. That is, the suction valve 132 is disposed on one side of the compression space P, and the discharge valve 152 is disposed on the other side of the compression space P.

When the pressure in the compression space P is lower than the discharge pressure and the suction pressure is lower than the suction pressure in the reciprocating linear motion of the piston 130 in the cylinder 120, the suction valve 132 is opened, And sucked into the compression space (P). On the other hand, when the pressure in the compression space P becomes equal to or higher than the suction pressure, the refrigerant in the compression space P is compressed while the suction valve 132 is closed.

On the other hand, when the pressure in the compression space P becomes equal to or higher than the discharge pressure, the discharge valve 152 is opened, and the refrigerant is discharged from the compression space P and discharged to the discharge space 151. When the discharge of the refrigerant is completed, the discharge valve 152 is returned to close the compression space P.

The linear compressor 10 may further include a discharge guide pipe (not shown) coupled to the discharge cover 150 and discharging the refrigerant flowing into the discharge space 151. The refrigerant discharged from the discharge space 151 may flow along the discharge guide pipe (not shown) and then be discharged to the outside of the shell 101 through the discharge pipe described above.

In addition, some of the refrigerant gas discharged into the discharge space 151 may be supplied between the cylinder 120 and the piston 130. This refrigerant gas is understood to be a refrigerant used as a gas bearing of the linear compressor 10.

The motor assembly 140 includes a stator 142, a magnet 144 mounted on the stator 142, and a mover 146 moving with respect to the stator 142.

The stator 142 includes an inner stator 142a and an outer stator 142b coupled to the outside of the inner stator 142a in the radial direction. The inner stator 142a and the outer stator 142b may be made of a magnetic material or a conductive material.

A coil 143 may be wound between the inner stator 142a and the outer stator 142b. For example, the coil 143 may be coupled to the inner stator 142a while the outer stator 142b is wound on the inner stator 142a. Alternatively, the coil 143 may be previously wound in a ring shape so that the outer stator 142b may be engaged with the inner stator 142a while surrounding the inner stator 142a.

The magnet 144 may be installed on at least one of the outer circumferential surface of the inner stator 142a or the inner circumferential surface of the outer stator 142b. 1, the magnet 144 is installed on the outer stator 142b, but this is merely an example.

At this time, the magnet 144 may have a plurality of arc-shaped cross-sections when viewed from the axial direction. The plurality of magnets 144 may be disposed on the outer circumferential surface of the inner stator 142a or on the inner circumferential surface of the outer stator 144b in the circumferential direction. In addition, the magnet 144 may be formed such that different magnetic poles are arranged in the axial direction.

The mover 146 includes a connection portion 146a connected to the piston 130 and a movable core 146b installed at the connection portion 146a.

The connection portion 146a supports the movable core 146b and connects the piston 130 and the movable core 146b. At this time, a part of the connection portion 146a may be positioned between the stator 142. [ For example, at least a part of the connection portion 146a may be formed in a cylindrical shape.

The movable core 146b may be disposed on the connection portion 146a so as to face the magnet 144. [ The movable core 146a is made of a magnetic material and reciprocates with respect to the stator 142 and the magnet 144. [

Since the piston 130 and the mover 146b are connected by the connecting portion 146a, the piston 130 can reciprocate as the movable core 146b reciprocates. The piston 130 and the mover 146, which reciprocate in the axial direction, may be referred to as a driver.

In detail, when the mover 146 reciprocates with respect to the stator 142 and the magnet 144, the piston 130 inserted into the cylinder 120 moves to the movable core 146b And reciprocates in the axial direction together. The piston 130 and the mover 146 reciprocating in the axial direction can be referred to as a driving portion.

The structure of the driving unit and the compressor body 100 are illustrative and may be provided in various forms.

The linear compressor according to an embodiment of the present invention includes a damping member 200 disposed between the shell 101 and the compressor body 100. The damping member 200 is disposed such that the shell 101 and the compressor body 100 are positioned adjacent to each other, unlike a support device generally used in a linear compressor.

As shown in FIG. 1, the damping member 200 is provided in a plate shape having a predetermined thickness.

Specifically, the damping member 200 is provided with a first surface (see FIGS. 2 and 4, see 210a and 220a) having a first contact portion (see FIGS. 2 and 4, 212a and 222a) in contact with the inner surface of the shell 101, And a second side (see FIGS. 2 and 4, 210b and 220b) having a second contact portion (see FIGS. 2 and 4, 212b and 222b) in contact with the outer surface of the compressor body 100.

At this time, the second surfaces 210b and 220b correspond to the surfaces facing the first surfaces 210a and 220a. It is also understood that the first contact portions 212a and 222a and the second contact portions 212b and 222b correspond to the first faces 210a and 220a and the second faces 210b and 220b, have.

The minimum distance, that is, the vertical distance between the first surfaces 210a and 220a and the second surfaces 210b and 220b corresponds to the thickness of the damping member 200. The first surface 210a and the second surface 210b of the damping member 200 may be perpendicular to the first and second surfaces 210b and 220b.

Further, the damping member 200 is provided in a rod shape as a whole. That is, the first surfaces 210a and 220a and the second surfaces 210b and 220b may have a substantially rectangular shape extending in one direction.

At this time, the damping member 200 is formed such that the first surfaces 210a and 220a and the second surfaces 210b and 220b are bent at at least one curvature. That is, the end surface of the damping member 200 may be formed into a shape bent at least at one curvature.

The minimum distance between the first surfaces 210a and 220a and the second surfaces 210b and 220b may be smaller than the minimum distance between the inner surface of the shell 101 and the outer surface of the compressor body 100. That is, the thickness of the damping member 200 is smaller than the minimum distance between the inner surface of the shell 101 and the outer surface of the compressor body 100.

With this structure, it is possible to prevent the vibration generated due to the operation of the driving unit included in the compressor body 100 from being transmitted to the shell 101. In detail, the minimum distance between the inner surface of the shell 101 and the outer surface of the compressor body 100 can be changed by the vibration generated as the drive unit is operated.

The curvature of the damping member 200 located between the inner surface of the shell 101 and the outer surface of the compressor body 100 can be changed. That is, when the minimum distance between the inner surface of the shell 101 and the outer surface of the compressor body 100 becomes small, the first surfaces 210a and 220a of the damping member 200 and the second surfaces 210b, 220b are deformed so that the curvature is reduced.

When the minimum distance between the inner surface of the shell 101 and the outer surface of the compressor body 100 is increased, the first surfaces 210a and 220a of the damping member 200 and the second surfaces 210b and 220b The external force is removed and the curvature is increased. The vibration can be reduced in accordance with a change in the curvature of the damping member 200, that is, a change in shape.

The damping member 200 may be made of a material having a predetermined elasticity so that the shape of the damping member 200 can be changed.

The damping member 200 includes a first damping member 210 disposed between the shell 101 and the compressor body 100 in the radial direction and a second damping member 210 disposed between the shell 101 and the compressor 100 in the axial direction. And a second damping member 220 disposed between the main body 100.

The damping member 200 may have various shapes, and the first damping member 210 and the second damping member 220 may have different shapes. However, in an exemplary shape, the first damping member 210 and the second damping member 220 may have the same shape or various shapes not described in the drawings.

Hereinafter, exemplary shapes of the first damping member 210 and the second damping member 220 will be described in detail.

FIG. 2 is a view showing part A of FIG. 1, and FIG. 3 is a view showing a first damping member installed in a linear compressor according to an embodiment of the present invention.

2 and 3, the first damping member 210 is provided with a first surface 210a having a first contact portion 212a and a second contact portion 212b, And a second surface 210b facing the surface 210a.

Specifically, the first contact portion 212a contacts the inner surface of the shell 101, that is, the inner surface of the shell 101 in the radial direction. The second contact portion 212b is in contact with the outer surface of the compressor body 100, that is, the outer surface of the compressor body 100 in the radial direction. In particular, the second contact portion 212b may contact the outer surface of the outer stator 142b, which corresponds to the outermost radial direction of the compressor body 100.

At this time, the first damping member 210 is formed with a plurality of concave-convex portions 214a and 214b for bending the first surface 210a and the second surface 210b. The plurality of concavities and convexities include a first concavo-convex portion 214a for forming the first contact portion 212a and a second concavo-convex portion 214b for forming the second contact portion 212b.

That is, the first concavo-convex portion 214a is formed to be convex toward the shell 101 so as to form the first contact portion 212a contacting the shell 101. [ The second concavo-convex portion 214b is formed to be convex toward the compressor body 100 to form the second contact portion 212b contacting the compressor body 100. [

In addition, a plurality of the first concave-convex portion 214a and the second concave-convex portion 214b may be provided, and they may be disposed to intersect with each other. That is, a plurality of the first contact portions 212a and the second contact portions 212b are provided and are disposed to be intersecting with each other. The number of the first contact portions 212a and the second contact portions 212b may vary depending on the design.

The first damping member 210 is formed in an axially extending rod shape. 3, the first damping member 210 and the compressor body 100 have a length corresponding to the axial length of the compressor body 100. However, this is merely an example.

For example, the first damping member 210 may extend axially shorter than the axial length of the compressor body 100. In addition, a plurality of first damping members 210 may be disposed in a state of being spaced apart from or in contact with the axial direction of the compressor body 100.

Also, a plurality of the first damping members 210 may be disposed in the circumferential direction of the compressor body 100. At this time, the plurality of first damping members 210 may be disposed at equal intervals along the radial outer surface of the compressor body 100.

Referring to FIG. 3, the first damping members 210 are provided corresponding to the number of the six stator 142. That is, one first damping member 210 is provided on each of the outer stator 142b. The first damping member 210 may be provided in various numbers. However, three or more of the first damping members 210 may be provided for effective vibration prevention.

Also, the first damping member 210 may be disposed in the circumferential center of each outer stator 142b. The first damping member 210 may be at least partly coupled to the outside of the compressor body 100 or may be coupled to the inside of the shell 101 to be fixed at a predetermined position.

FIG. 4 is a view showing part B of FIG. 1, and FIG. 5 is a view showing a second damping member installed in a linear compressor according to an embodiment of the present invention.

4 and 5, the second damping member 220 is provided with a first surface 220a having a first contact portion 222a and a second contact portion 222b, And a second surface 220b facing the surface 220a.

Specifically, the first contact portion 222a contacts the inner upper surface of the shell 101, that is, the inner surface of the shell 101 in the axial direction. The second contact portion 212b is in contact with the outer upper surface of the compressor body 100, that is, the outer surface of the compressor body 100 in the axial direction. In particular, the second contact portion 212b may contact the upper surface of the outer stator 142b, which corresponds to the outermost axial direction of the compressor body 100.

At this time, the first contact portion 222a may be positioned on one side of the second damping member 220, and the second contact portion 222b may be located on the other side of the second damping member 220. Referring to FIG. 4, the second contact portion 222b is located radially inward of the first contact portion 222a.

The second damping member 220 may be formed between the first contact portion 222a and the second contact portion 222b to bend the first surface 220a and the second surface 220b to one side (Not shown). The bending portion 224 may be formed closer to the second contact portion 222b than the first contact portion 222a.

Accordingly, the area of the first contact portion 222a may be smaller than the area of the second contact portion 222b. In particular, the first contact portion 222a is provided in a line, and the first surface 220a and the shell 101 can be in line contact. On the other hand, the second contact portion 222b is provided as a surface, and the second surface 220b and the compressor body 100 can be in surface contact with each other.

The second damping member 220 is formed into a rod shape extending in the radial direction. In FIG. 5, one second damping member 220 is shown as being extended shorter than the upper surface of the outer stator 142b, but this is merely an example.

Also, a plurality of the second damping members 220 may be disposed in the circumferential direction of the compressor body 100. At this time, the plurality of second damping members 220 may be disposed at equal intervals along the axially outer upper surface of the compressor body 100.

Referring to FIG. 5, the number of the second damping members 220 is six, corresponding to the number of the six stator 142. That is, one second damping member 220 is provided on each outer stator 142b. The second damping member 220 may be provided in various numbers. However, three or more of the second damping members 220 may be provided for effective vibration prevention.

In addition, the second damping member 220 may be disposed in the circumferential center of each of the outer stator 142b. The second damping member 220 may be at least partly coupled to the outside of the compressor body 100 or may be coupled to the inside of the shell 101 and fixed at a predetermined position.

The damping member 200 may further include a connection portion 230 connecting the plurality of second damping members 220. The connection part 230 is formed in a ring shape centering on the central axis of the compressor body 100 and may be coupled to one end of the plurality of second damping members 200.

Accordingly, the second damping member 220 can be fixed at a predetermined position as the connection portion 230 is coupled to the shell 101 or the compressor body 100. The shape of the connecting portion 230 is not limited thereto.

6 is a view showing a comparison of noise between a linear compressor and a conventional linear compressor according to an embodiment of the present invention.

In the graph of FIG. 6, the x-axis represents the frequency and the y-axis represents the frequency response function (FRF), which corresponds to the vibration level. This is experimental and can vary depending on the design.

The solid line shows the vibration by the linear compressor of the present invention, and the dotted line shows the vibration by the conventional linear compressor. At this time, the conventional linear compressor corresponds to the compressor designed to secure the minimum distance between the shell and the compressor body like the compressor of the present invention.

That is, FIG. 6 corresponds to the graph shown by comparing the case where the damping member is present and the case where there is no damping member. Referring to FIG. 6, it can be seen that the vibration level is greatly reduced at most frequencies.

Accordingly, it is possible to design the compressor such that the vibration generated in the driving portion by the damping member is reduced, and the shell and the compressor main body are separated by the minimum distance. Thus, a more compact and simplified compressor can be provided.

10: Linear compressor 100: Compressor main body
101: shell 200: damping member
210: first damping member 220: second damping member
210a, 220a: first surface 210b, 220b: second surface
212a, 222a: first contact portion 212b, 222b: second contact portion

Claims (15)

Shell;
A compressor body disposed inside the shell; And
And a damping member disposed between the shell and the compressor body,
In the damping member,
A first surface having a first contact portion in contact with an inner surface of the shell;
And a second surface opposite to the first surface, the second surface having a second contact portion in contact with an outer surface of the compressor body,
Wherein the damping member is formed such that the first surface and the second surface are curved in at least one curvature. delete The method according to claim 1,
Wherein the damping member is provided in a bar shape having a section in a direction perpendicular to the first surface and the second surface,
Wherein a cross section of the damping member is formed in at least one curved shape. The method according to claim 1,
Wherein a minimum distance between said first surface and said second surface is smaller than a minimum distance between an inner surface of said shell and an outer surface of said compressor body. The method of claim 3,
As the minimum distance between the inner surface of the shell and the outer surface of the compressor body changes,
Wherein the at least one curvature is changed. The method according to claim 1,
Wherein the damping member is provided with a plurality of concavo-convex portions in which the first surface and the second surface are bent. The method according to claim 6,
Wherein the plurality of concavo-
A first irregular portion forming the first contact portion; And
And a second uneven portion forming the second contact portion. 8. The method of claim 7,
Wherein a plurality of the first concavo-convex part and the second concavo-convex part are provided, and are arranged to be crossed with each other. The method according to claim 1,
Wherein the first contact portion is located on one side of the damping member and the second contact portion is located on the other side of the damping member. 10. The method of claim 9,
Wherein the damping member further includes a bending portion formed between the first contact portion and the second contact portion and bending the first surface and the second surface to one side. 10. The method of claim 9,
And the area of the first contact portion is smaller than the area of the second contact portion. The method according to claim 1,
Wherein the compressor body includes a driving part reciprocating in an axial direction,
In the damping member,
A first damping member disposed between the shell and the compressor body in a radial direction perpendicular to the axial direction,
And a second damping member disposed between the shell and the compressor body in the axial direction. 13. The method of claim 12,
Wherein the first damping member is formed to extend in the axial direction, and a plurality of the first damping members are disposed in the circumferential direction of the compressor main body. 13. The method of claim 12,
Wherein the second damping member is formed to extend in the radial direction, and a plurality of the second damping members are disposed in the circumferential direction of the compressor main body. 15. The method of claim 14,
Wherein the damping member further includes a ring-shaped connecting portion connecting the plurality of second damping members.

Images