KR20180040791A - Linear compressor - Google Patents

Abstract

The present invention relates to a linear compressor. The linear compressor according to one aspect of the present invention comprises: a shell; a shell cover covering the shell; a compressor main body accommodated at the inside of the shell, and compressing a refrigerant; a support device connected to the compressor main body and supporting the compressor main body; and a stopper fixed to the shell cover and limiting movement of the support device, wherein the stopper comprises: a stopper body fixed to the shell cover; and a dynamic vibration reducer extended from the stopper body and reducing vibration of the shell cover by self-vibration.

Description

[0001] Linear compressor [0002]

The present invention relates to a linear compressor.

The cooling system is a system that generates cool air by circulating a coolant, and repeats the process of compressing, condensing, expanding, and evaporating the coolant. To this end, the cooling system includes a compressor, a condenser, an expansion device and an evaporator. The cooling system may be installed in a refrigerator or an air conditioner as a household appliance.

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. .

Such a compressor is broadly classified into a reciprocating compressor that compresses the refrigerant while linearly reciprocating the piston inside the cylinder so as to form a compression space in which a working gas is sucked and discharged between the piston and the cylinder. A rotary compressor for compressing the refrigerant while the roller is eccentrically rotated along the inner wall of the cylinder and a compression space for sucking and discharging the working gas between the roller and the cylinder, a scroll compressor in which a compression space in which an operating gas is sucked and discharged is formed between a fixed scroll and a fixed scroll and the orbiting scroll rotates along the fixed scroll to compress the refrigerant.

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

Normally, the linear compressor is configured to suck and compress the refrigerant while discharging the refrigerant while moving the piston in the sealed shell by reciprocating linear motion within the cylinder by the linear motor.

The linear motor is configured such that a permanent magnet is positioned between an inner stator and an outer stator, and the permanent magnet is driven to linearly reciprocate by the mutual electromagnetic force between the permanent magnet and the inner (or outer) stator. As the permanent magnet is driven in the state of being connected to the piston, the piston linearly reciprocates in the cylinder, sucks the refrigerant, compresses the refrigerant, and discharges the refrigerant.

Korean Patent Laid-Open No. 10-2016-0009306 (Laid-open date 2016.01.24), which is a prior art document, discloses a linear compressor and a refrigerator including the same.

The linear compressor includes a suction portion, a discharge portion, a compressor casing, a compressor body, and a body support portion.

The main body supporting portion is provided at both ends of the compressor body for supporting the compressor body in the compressor casing.

The body support portion includes a leaf spring. The plate spring is mounted perpendicular to the axial direction of the compressor main body. In this case, due to the characteristics of the leaf spring, a large lateral stiffness (rigidity in a direction perpendicular to the axial direction of the compressor main body) and small longitudinal stiffness Rigidity).

However, according to the prior art, since the leaf spring is fixed directly to the compressor casing, the vibration of the compressor body is transmitted to the compressor casing by the leaf spring. Accordingly, there is a problem that the compressor casing vibrates and noise due to the vibration of the compressor casing is generated.

Further, since the noise on the discharge side of the linear compressor is larger than the noise on the suction side, since the second cover provided on the discharge side of the linear compressor directly contacts the base shell, noise due to vibration of the second cover is generated there is a problem.

In the prior art, the compressor main body is spaced apart from each cover in a state where the compressor is stopped, but the compressor main body collides with one of the covers by the axial movement of the compressor main body in the course of the compressor being transported.

At this time, when the impact amount of the compressor main body and the cover is large, the plate spring is deformed. In the case of the prior art, since the structure for reducing the moving distance of the compressor body in the axial direction is not provided, the amount of electric power of the compressor body and the cover increases as the axial movement distance of the compressor body increases, The spring is likely to be deformed.

An object of the present invention is to provide a linear compressor in which vibration noise of a shell cover is reduced.

It is another object of the present invention to provide a linear compressor in which deformation of a leaf spring for supporting a compressor main body can be prevented by restricting axial movement of the compressor main body within a certain range during a transportation process or an operation process of the compressor main body have.

According to an aspect of the present invention, there is provided a linear compressor including: a shell; A shell cover covering the shell; A compressor body accommodated in the shell, the compressor body for compressing the refrigerant; A supporting device connected to the compressor body to support the compressor body; And a stopper fixed to the shell cover and restricting movement of the support device.

The stopper includes a stopper body fixed to the shell cover, and a dynamic damper extending from the stopper body to reduce the vibration of the shell cover by self oscillation.

The dynamic damper may vibrate while being elastically deformed with respect to the stopper body.

In order to enable vibration of the dynamic damper, the dynamic damper may include a first portion having a first width and a second portion extending from the first portion and having a second width larger than the first width .

The thickness of the dynamic damper may be set smaller than the first width and the second width.

The stopper body may include a fixing portion fixed to the shell cover and a restriction portion extending from the fixing portion toward the compressor body.

The restricting portion may be formed in a cylindrical shape.

The first portion may extend in a direction parallel to the fixed portion at a position spaced apart from the shell cover in the restricting portion.

The fixing portion may be welded to the shell cover by three or more points.

The shell cover may include a cover body and a contact portion extending in a direction away from the compressor body at the cover body and contacting the inner circumferential surface of the shell.

At least a portion of the cover body may be positioned within the shell while the contact portion is in contact with the shell.

The cover body may include a first depressed portion that is recessed in a direction away from the compressor body and a second depressed portion that is recessed in a direction away from the compressor body in the first depressed portion.

The stopper body may be fixed to the second depression.

And the plurality of dynamic damper units may be disposed symmetrically with respect to the center of the stopper body.

The stopper may include a cylindrical restriction portion, and the support device may include a contact member capable of contacting the restriction portion.

The contact member may include a circumferential portion formed at a diameter different from the diameter of the restriction portion and spaced apart from the restriction portion.

The supporting device may include a leaf spring, and the stopper may further include a fixing part fixed to the shell cover.

The restricting portion may extend from the fixing portion toward the compressor main body, and the peripheral portion may contact the fixing portion when the compressor main body vibrates in the axial direction while being separated from the fixing portion.

The support device may include a spring connection portion connecting the leaf spring to the compressor main body. The contact member can be fastened to the spring connection portion by a fastening member.

The shell cover may include a depressed portion for preventing the dynamic damper from colliding with the dynamic damper during the vibration of the dynamic damper.

The shell cover is a cover adjacent to the discharge side of the compressor main body.

A linear compressor according to another aspect comprises: a shell; A compressor body accommodated in the shell, the compressor body for compressing the refrigerant; A shell cover covering the shell on the discharge side of the compressor main body; A fixed body fixed to the shell cover; And a dynamic damper that vibrates in a radial direction of the compressor body at a position spaced apart from the shell cover of the fixed body and vibrates to reduce vibration of the shell cover.

According to the proposed invention, the axial vibration of the shell cover is reduced due to vibration of the dynamic damper during operation of the linear compressor, thereby changing the frequency band in which the maximum noise value exists, thereby reducing the maximum noise value at a specific frequency.

Further, even if the compressor body is vibrated in the radial direction in the process of transporting the linear compressor, the movement of the compressor body in the radial direction by the stopper is restricted, so that the motor assembly is prevented from colliding with the shell, It can be prevented from being broken.

In addition, since the linear compressor includes the stopper for restricting the axial movement of the compressor main body, breakage due to excessive deformation of the leaf spring for supporting the compressor main body can be prevented.

1 is an external perspective view showing a configuration of a linear compressor according to an embodiment of the present invention;
2 is an exploded perspective view of a shell and a shell cover of a linear compressor according to an embodiment of the present invention;
3 is an exploded perspective view of internal components of a linear compressor according to an embodiment of the present invention.
4 is a cross-sectional view taken along line I-I 'of FIG.
FIGS. 5 and 6 are exploded perspective views showing a discharge side support device according to an embodiment of the present invention, and FIG. 7 is a sectional view showing a state in which a discharge side support device according to an embodiment of the present invention is coupled to a discharge cover.
8 is a view showing a state where the stopper according to the embodiment of the present invention is fixed to the second shell cover.
9 is a plan view of a stopper according to an embodiment of the present invention.
10 is a sectional view of a discharge side support device according to an embodiment of the present invention.
11 is a graph showing the degree of noise according to the presence or absence of the dynamic damper.
12 is a sectional view showing a state in which the discharge side support device of the present invention is fixed to the shell;

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;

FIG. 1 is an external perspective view showing a configuration of a linear compressor according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a shell and a shell cover of a linear compressor according to an embodiment of the present invention.

1 and 2, a linear compressor 10 according to an embodiment of the present invention may include a shell 101 and a shell cover 102, 103 coupled to the shell 101. In a broad sense, the shell covers 102 and 103 can be understood as one configuration of the shell 101. [

Accordingly, the shell 101 and the shell covers 102 and 103 are collectively referred to as a compressor casing.

On the lower side of the shell 101, the legs 50 can be engaged. The legs 50 may be coupled to the base of the product on which the linear compressor 10 is installed. For example, the article 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 shell 101 has a substantially cylindrical shape, and may be disposed to lie in the lateral direction or to lie in the axial direction. 1, the shell 101 may be elongated in the transverse direction and may have a somewhat lower height in the radial direction. That is, since the linear compressor 10 can have a low height, when the linear compressor 10 is installed in the machine room base of the refrigerator, the height of the machine room can be reduced.

A terminal 108 may be provided on the outer surface of the shell 101. The terminal 108 may deliver external power to the motor 140 (see FIG. 3) of the linear compressor 10. The terminal 108 may be connected to the lead of the coil 141c (see FIG. 3).

On the outside of the terminal 108, a bracket 109 is provided. The bracket 109 may function to protect the terminal 108 from an external impact or the like.

Both sides of the shell 101 are configured to be open. On both sides of the opened shell 101, the shell covers 102 and 103 can be coupled. In detail, the shell covers 102 and 103 include a first shell cover 102 coupled to one side of the shell 101 that is opened, and a second shell cover 102 coupled to the other side of the shell 101, (103). By the shell covers 102 and 103, the inner space of the shell 101 can be sealed.

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

The linear compressor 10 may further include a plurality of pipes 104, 105, and 106 which are provided in the shell 101 or the shell covers 102 and 103 and capable of sucking, have.

The plurality of pipes (104, 105, and 106) includes a suction pipe (104) for allowing the refrigerant to be sucked into the linear compressor (10), a discharge pipe for discharging the compressed refrigerant from the linear compressor (105).

In addition, the plurality of pipes 104, 105, and 106 may include a process pipe 106 for replenishing refrigerant to the linear compressor 10.

For example, the suction pipe 104 may be coupled to the first shell cover 102. The refrigerant can 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 shell 101. 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 105.

The process pipe 106 may be coupled to the outer circumferential surface of the shell 101. The operator can inject the 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 than the discharge pipe 105 to avoid interference with the discharge pipe 105. The height is understood as a distance in a vertical direction (or a radial direction) from the legs 50. The discharge pipe 105 and the process pipe 106 are coupled to the outer circumferential surface of the shell 101 at different heights, thereby improving work convenience.

On the inner surface of the first shell cover 102, a plurality of stoppers 500 may be provided. The plurality of stoppers 500 prevent the compressor body 100, particularly the motor 140, from being damaged by vibrations or shocks generated during transportation of the linear compressor 10.

FIG. 3 is an exploded perspective view of internal components of a linear compressor according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line I-I 'of FIG.

3 and 4, a linear compressor 10 according to an embodiment of the present invention includes a compressor main body 100 and a main body 100 of the compressor 100. The main body 100 includes the shell 101 and the shell covers 102 and 103, And one or more support devices (200, 300) for supporting one or more of the two or more support devices.

For example, the at least one support device 200, 300 may support the compressor body 100 such that the compressor body 100 is spaced apart from the shell 101.

The compressor main body 100 includes a cylinder 120 provided in the shell 101, a piston 130 linearly reciprocating in the cylinder 120, and a driving force And a motor 140 for driving the motor. When the motor 140 is driven, the piston 130 can reciprocate in the axial direction.

The compressor main body 100 may further include a suction muffler 150 coupled to the piston 130 to reduce 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, in the course of the refrigerant passing through the suction muffler 150, the flow noise of the refrigerant can be reduced.

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

The first muffler 151 is positioned inside the piston 130 and the second muffler 152 is coupled to the rear side of the first muffler 151. The third muffler 153 accommodates 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 can 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 may further include a muffler filter 155. The muffler filter 155 may be positioned at an interface between the first muffler 151 and the second muffler 152. For example, the muffler filter 155 may have a circular shape, and an outer peripheral portion of the muffler filter 155 may be supported between the first and second mufflers 151 and 152.

Define the direction.

The term "axial direction" can be understood as a direction in which the piston 130 reciprocates, that is, a lateral direction in FIG.

Of these "axial directions", 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 "forward" and the opposite direction is defined as "rearward".

On the other hand, the term "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.

The axis of the compressor main body means the axial center line of the piston 130. [ The axial center line of the piston 130 passes through the first and second shell covers 102 and 103.

The piston 130 may include a piston body 131 formed in a substantially cylindrical shape and a piston flange portion 132 extending in a radial direction from the piston body 131. The piston body 131 reciprocates within the cylinder 120 and the piston flange 132 can reciprocate outside the cylinder 120.

The cylinder 120 may receive at least a portion of the first muffler 151 and at least a portion of the piston body 131.

A compression space P in which the refrigerant is compressed by the piston 130 is formed in the cylinder 120. A suction hole 133 for introducing a refrigerant into the compression space P is formed in a front portion of the piston body 131. A suction hole 133 is formed in front of the suction hole 133, A suction valve 135 is provided. At a substantially central portion of the suction valve 135, a fastening hole to which a predetermined fastening member is coupled is formed.

A discharge cover 160 which forms a discharge space 160a of the refrigerant discharged from the compression space P and a discharge cover 160 which is coupled to the discharge cover 160 and is disposed in front of the compression space P, There is provided a discharge valve assembly 161, 163 for selectively discharging the compressed refrigerant. The discharge space 160a may include a plurality of spaces defined by inner walls of the discharge cover 160. [ The plurality of space portions are arranged in the front-rear direction and can communicate with each other.

The discharge valve assemblies 161 and 163 are provided with a discharge valve 161 that opens when the pressure in the compression space P becomes equal to or higher than the discharge pressure and causes the refrigerant to flow into the discharge space of the discharge cover 160, And a spring assembly 163 provided between the discharge cover 161 and the discharge cover 160 to provide an elastic force in the axial direction.

The spring assembly 163 may include a valve spring 163a and a spring support portion 163b for supporting the valve spring 163a on the discharge cover 160. [ For example, the valve spring 163a may include a leaf spring. The spring support portion 163b may be integrally injection-molded into the valve spring 163a by an injection process.

The discharge valve 161 is coupled to the valve spring 163a and a rear portion or a rear surface of the discharge valve 161 is positioned to be capable of supporting 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. When the discharge valve 161 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.

The compression space (P) is a space formed between the suction valve (135) and the discharge valve (161). The suction valve 135 is provided at one side of the compression space P and the discharge valve 161 can be provided at the other side of the compression space P, have.

When the pressure in the compression space P becomes lower than the discharge pressure and becomes lower than the suction pressure in the course of reciprocating linear motion of the piston 130 in the cylinder 120, the suction valve 135 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 135 is closed.

On the other hand, when the pressure in the compression space P becomes equal to or higher than the discharge pressure, the valve spring 163a is deformed forward to open the discharge valve 161, and the refrigerant is discharged from the compression space P , And is discharged to the discharge space of the discharge cover (160). 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.

The compressor main body 100 may further include 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.

The compressor main body 100 may further include a loop pipe 162b coupled to the cover pipe 162a and transmitting the refrigerant flowing through the cover pipe 162a to the discharge pipe 105 have. One side of the loop pipe 162b may be coupled to the cover pipe 162a and the other side may be coupled to the discharge pipe 105. [

The loop pipe 162b is made of a flexible material. The loop pipe 162b may extend roundly from the cover pipe 162a along the inner circumferential surface of the shell 101 and may be coupled to the discharge pipe 105. [ For example, the loop pipe 162b may be disposed in a coiled form.

The compressor body 100 may further include a frame 110. The frame 110 fixes the cylinder 120. For example, the cylinder 120 may be press-fitted into the inside of the frame 110.

The frame 110 is disposed to surround the cylinder 120. That is, the cylinder 120 may be positioned to be received inside the frame 110. The discharge cover 160 may be coupled to the front surface of the frame 110 by fastening members.

The compressor main body 100 may further include a motor 140.

The motor 140 includes an outer stator 141 fixed to the frame 110 so as to surround the cylinder 120 and an inner stator 148 spaced inward from the outer stator 141, And a permanent magnet 146 positioned in the space between the outer stator 141 and the inner stator 148.

The permanent magnets 146 can reciprocate linearly by mutual electromagnetic forces with the outer stator 141 and the inner stator 148. The permanent magnets 146 may be formed of a single magnet having one pole or a plurality of magnets having three poles.

The permanent magnet 146 may be installed on the magnet frame 138. The magnet frame 138 has a substantially cylindrical shape and may be arranged to be inserted into a space between the outer stator 141 and the inner stator 148.

 4, the magnet frame 138 is coupled to the piston flange portion 132, extends in the outer radial direction, and can be bent forward. The permanent magnet 146 may be installed at a front portion of the magnet frame 138. When the permanent magnet 146 reciprocates, the piston 130 can reciprocate axially together with the permanent magnet 146.

The outer stator 141 may include a coil winding body 141b, 141c and 141d and a stator core 141a. The coil windings 141b, 141c and 141d may include a bobbin 141b and a coil 141c wound around the bobbin in the circumferential direction. The coil windings 141b, 141c and 141d may further include a terminal portion 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 have.

The stator core 141a may include a plurality of core blocks in which a plurality of laminations are stacked in a circumferential direction. The plurality of core blocks may be disposed so as to surround at least a part of the coil winding body 141b, 141c.

A stator cover 149 is provided at one side of the outer stator 141. That is, one side of the outer stator 141 may be supported by the frame 110 and the other side may be supported by the stator cover 149.

The linear compressor 10 may further include a cover fastening member 149a for fastening the stator cover 149 and the frame 110 together. The cover fastening member 149a may extend forward toward the frame 110 through the stator cover 149 and may be coupled to the frame 110. [

That is, when one side of the motor is supported by the frame 110 and the other side is supported by the stator cover 149, the cover fastening member 149a is engaged with the stator cover 149 and the frame 110, .

Therefore, in the present invention, the frame 110 and the stator cover 149 that support the motor 140 and the motor 140 may collectively be referred to as a "motor assembly".

Further, since the frame 110 and the stator cover 149 support the motor 140, they can be referred to as a "motor support portion ".

The inner stator 148 is fixed to the outer periphery of the frame 110. The inner stator 148 is formed by laminating a plurality of laminations in the circumferential direction from the outside of the frame 110.

The compressor main body 100 may further include a supporter 137 for supporting the piston 130. The supporter 137 is coupled to the rear side of the piston 130 and the muffler 150 passes through the inside of the supporter 137. The piston flange portion 132, the magnet frame 138, and the supporter 137 may be fastened by a fastening member.

To the supporter 137, a balance weight 179 may be combined. The weight of the balance weight 179 may be determined based on the operating frequency range of the compressor main body 100.

The compressor body 100 may further include a back cover 170 coupled to the stator cover 149 and extending rearward.

In detail, the back cover 170 may be coupled to the rear surface of the stator cover 149. A spacer 181 may be interposed between the back cover 170 and the rear surface of the stator cover 149. The distance from the stator cover 149 to the rear end of the back cover 170 can be determined by adjusting the thickness of the spacer 181. The back cover 170 may be spring-supported to the supporter 137.

The compressor main body 100 may further include an inlet guide unit 156 coupled to the back cover 170 and guiding the inflow of the refrigerant into the muffler 150. At least a portion of the inflow guide portion 156 may be inserted into the suction muffler 150.

The compressor main body 100 may further include a plurality of resonance springs 176a and 176b whose natural frequencies are adjusted so that the piston 130 can resonate.

The plurality of resonance springs 176a and 176b includes a first resonance spring 176a supported between the supporter 137 and the stator cover 149 and a second resonance spring 176b between the supporter 137 and the back cover 170 And a second resonant spring 176b supported. By the action of the plurality of resonance springs 176a and 176b, stable movement of the movable part reciprocating in the linear compressor 10 is performed, and generation of vibration or noise due to the movement of the movable part can be reduced.

The compressor main body 100 may further include a plurality of sealing members 127 and 128 for increasing a coupling force between the frame 110 and components around the frame 110. [

The plurality of sealing members 127 and 128 may include a first sealing member 127 provided at a portion where the frame 110 and the discharge cover 160 are coupled. The plurality of sealing members 127 and 128 may further include a second sealing member 128 provided at a portion where the frame 110 and the cylinder 120 are coupled.

The first and second sealing members 127 and 128 may have a ring shape.

The at least one support device 200, 300 may include a suction side support device 200 coupled to one side of the compressor body 100. The suction side support device 220 may be located at a portion where the refrigerant is sucked in the compressor body 100.

The at least one support device 200, 300 may include a discharge side support device 300 coupled to the other side of the compressor body 100. The discharge side support device 220 may be located at a portion where the refrigerant is discharged from the compressor body 100.

The axial vibration and the radial vibration of the compressor body 100 are absorbed by the suction side support device and the discharge side support devices 200 and 300 so that the compressor body 100 is moved to the shell 101 or the shell cover 102, 103, respectively.

FIGS. 5 and 6 are exploded perspective views showing a discharge side support device according to an embodiment of the present invention, and FIG. 7 is a sectional view showing a state in which a discharge side support device according to an embodiment of the present invention is coupled to a discharge cover.

FIG. 8 is a view showing a state where the stopper according to the embodiment of the present invention is fixed to the second shell cover, FIG. 9 is a plan view of the stopper according to the embodiment of the present invention, Sectional view of the discharge side support device.

11 is a graph showing the degree of noise according to the presence or absence of the dynamic damper.

5 to 11, the discharge side support device 300 may be coupled to the shell 101 in a state of being connected to the compressor main body 100.

The discharge side support device 300 may include a leaf spring 310.

According to the present embodiment, as the discharge side support device 300 includes the leaf spring 310 and is coupled to the shell 101, the crushing of the compressor body 100 can be reduced. The collapse of the compressor body 100 can be prevented so that the compressor body 100 can be prevented from colliding with the shell 101 during the operation of the compressor body 100. [

The discharge side support device 300 may further include a spring connection part 320 connected to the leaf spring 310. The spring connection portion 320 may be coupled to the discharge cover 160.

The discharge cover 160 may include a cover protrusion 166 to which the spring connection portion 320 is coupled. The cover protrusion 166 may be integrally formed with the discharge cover 160 or may be coupled to the discharge cover 160.

The discharge side support device 300 may further include a fastening member 330 for fastening the spring connection part 320 to the cover projection part 166.

Specifically, the cover protrusion 166 may include an insertion portion 167 for insertion into the spring connection portion 320.

The insertion portion 167 and the spring connection portion 320 may be formed such that the relative rotation of the cover projection portion 166 and the spring connection portion 320 is prevented when the insertion portion 167 is inserted into the spring connection portion 320. [ The protrusion 322 may be provided on one of the inner circumferential surfaces 321 of the protrusion 321 and the protrusion receiving groove 169 may be provided on the other.

7 shows that the protrusion 322 is provided on the inner circumferential surface 321 of the spring connection part 320 and the protrusion receiving groove 169 is formed in the insertion part 167. [

The fastening member 330 may be fastened to the insertion portion 167 of the cover protrusion 166 inserted into the spring connection portion 320.

The spring connection portion 320 may be integrally formed with the leaf spring 310 by inserting injection. The spring connection part 320 may be formed of a rubber material for vibration absorption.

The spring connecting portion 320 is inserted into the leaf spring 310 to prevent the spring connecting portion 320 from being separated from the leaf spring 310 in the axial direction of the compressor main body 100, The spring connection portion 320 includes a first portion 323 contacting the first surface of the leaf spring 310 and a second portion 323 contacting the second surface of the leaf spring 310 opposite to the first surface, 2 portion 324 and a third portion 325 connecting the first portion 323 and the second portion 324 in the space defined by the inner circumferential surface 316 of the leaf spring 310 .

The diameter of the first portion 323 and the diameter of the second portion 324 is greater than the diameter of the inner peripheral surface 316 of the leaf spring 310.

The leaf spring 310 may include an outer rim 311, an inner rim 315 and a spiral connection portion 319 connecting the outer rim 311 and the inner rim 315.

The inner rim 315 is formed with injection molding so that the spring connecting portion 320 is prevented from rotating with respect to the leaf spring 310 in a state where the spring connecting portion 320 is inserted into the leaf spring 310, One or more holes 317 through which the resin liquid can be filled can be formed.

The outer rim 315 is provided with a plurality of fixing portions 312 extending radially outward.

The discharge side support device 300 may further include a contact member 340 fastened to the spring connection portion 320 by the fastening member 330.

The contact member 340 may include a fastening portion 342 fastened to the spring connection portion 320 and a circumferential portion 344 extending from the fastening portion 342 toward the second shell cover 103 have. The peripheral portion 344 is not limited, but may be formed in a cylindrical shape.

In the second shell cover 103, axial movement of the compressor body 100 is restricted during axial vibration of the compressor body 100 to prevent deformation of the leaf spring 310, The stopper 400 may be fixed to prevent the compressor body 100 from colliding with the shell 101 when the compressor 100 vibrates in the radial direction.

For example, the stopper 400 may be fixed to the second shell cover 103 by welding. At this time, the stopper 400 may be welded at three or more points to be stably fixed to the second shell cover 103. The stopper 400 may be made of a sheet metal.

The second shell cover 103 may include a cover body 103b and a contact portion 103a extending in the axial direction of the compressor body 100 around the cover body 103b.

The contact portion 103a is in contact with the inner circumferential surface of the shell 101 and at least a part of the cover body 103b is in contact with the inner circumferential surface of the shell 101 when the contact portion 103a is in contact with the inner circumferential surface of the shell 101, And can be located in the inner space. That is, the contact portion 103a may extend in a direction away from the compressor body 100 in the cover body 103b.

The axial length of the linear compressor 10 may be limited depending on the installation position of the linear compressor 10. When the second shell cover 103 is located inside the shell 103 as in the present invention, The axial length of the linear compressor 10 can be prevented from increasing.

The volume of the inner space of the shell 101 may be reduced if the second shell cover 103 is located inside the shell 101. In order to reduce the volume of the shell 101, The body 103b includes a first depression 103c which is recessed in a direction away from the compressor body 100 in the cover body 103b (outward direction of the shell), and a second depression 103c in the first depression 103c, And a second depression 103d that is further recessed away from the main body 100. [ The stopper 400 may be welded to the second depression 103d.

The stopper 400 may include a stopper body. The stopper body may be formed in a cylindrical shape, for example. The stopper body may include a fixing part 402 fixed to the second shell cover 103 and a restricting part 404 extending from the fixing part 402. In the present invention, since the stopper body is a portion fixed to the second shell cover 103, the stopper body may be called a fixed body.

The restrictor 404 may extend toward the compressor body 100. For example, the restriction portion 404 may be formed in a cylindrical shape. The inner diameter of the limiting portion 404 may be larger than the outer diameter of the peripheral portion 344 of the contact member 340.

The peripheral portion 344 of the contact member 340 can be received in the region formed by the restriction portion 404 and the peripheral surface of the peripheral portion 344 of the contact member 340 can be received by the stopper 400 The restricting portion 404 may be formed on the inner circumferential surface.

When the compressor body 100 vibrates in the radial direction during the operation of the compressor body 100, the outer circumferential surface of the circumferential portion 344 of the contact member 340 contacts the limiting portion 404 of the stopper 400, So that the compressor body 100 can be prevented from colliding with the shell 101 because the radial movement of the compressor body 100 is limited.

The circumferential portion 344 of the contact member 340 is spaced apart from the fixing portion 402 in the operation stop state of the compressor main body 100. [ When the compressor body 100 vibrates in the axial direction during the operation of the compressor main body 100, the peripheral portion 344 of the contact member 340 contacts the fixed portion 402 of the stopper 400, The movement of the compressor body 100 in the axial direction can be restricted.

Meanwhile, when the linear compressor 10 is operated, the second shell cover 103 may vibrate in the axial direction of the compressor body 100 to generate noise. At this time, the larger the vibration amount of the second shell cover 103, the more the noise is increased.

Therefore, in order to minimize the vibration of the second shell cover 103, the stopper 400 may further include a dynamic vibration absorber 405 (dynamic vibration absorber).

The vibration damper 405 vibrates when vibration is transmitted from the shell 101 to the second shell cover 103, thereby minimizing vibration of the second shell cover 103 itself.

The dynamic damper 405 may extend in the radial direction of the compressor body 100 in the limiting portion 404. That is, the dynamic damper 405 may extend in a direction parallel to the fixed portion 402.

Then, a plurality of dynamic damper 405 can be extended from the restricting portion 404. At this time, in order to minimize the vibration of each of the plurality of dynamic absorbers 405 causing the vibration of the second shell cover 103, the plurality of dynamic absorbers 405 may be arranged to be symmetrical.

At this time, the dynamic absorber 405 is configured to prevent vibration of the dynamic damper 405 and prevent the dynamic damper 405 from contacting the second shell cover 103, And may extend from the restricting portion 404 in a spaced apart position.

The dynamic damper 405 includes a first portion 406 extending from the restricting portion 404 and having a first width and a second portion 406 extending from the first portion 406 to the extending direction of the first portion 406 And a second portion 407 extending in the same direction and having a second width greater than the first width.

The thickness of each of the first portion 406 and the second portion 407 is set to be smaller than the first width.

Therefore, the dynamic damper 405 can be vibrated while being elastically deformed with respect to the stopper body by the width difference and the thickness of the first portion 405 and the second portion 406.

At this time, since the second portion 407 actually acts as a mass in terms of natural frequency, the width of the second portion 407 can be varied to reduce the noise frequency of a specific band.

Referring to FIG. 11, when the stopper is not provided with the dynamic damper, the maximum noise value in a specific frequency band can be remarkably reduced by providing the dynamic damper on the stopper.

That is, as the dynamic damper 405 vibrates, the axial vibration of the second shell cover 103 is reduced to change the frequency band in which the maximum noise value exists, thereby reducing the maximum noise value at a specific frequency. Of course, noise may be generated due to the vibration of the dynamic damper 405 itself, but the noise added by the vibration of the dynamic damper 405 may be reduced due to the reduction of the vibration amount of the second shell cover 103 Lt; / RTI >

In addition, when the vibration of the second shell cover 103 is reduced, the radial vibration of the second shell cover 103 is reduced, so that the noise due to the radial vibration of the second shell cover 103 can be reduced.

According to the present invention, since the dynamic damper 405 is integrally formed with the stopper 400, there is an advantage that it is unnecessary to manufacture and install the dynamic damper 405.

At this time, even when the dynamic damper 405 vibrates, the first dam 103c is formed in the cover body 103b, so that in the vibration process of the dynamic damper 405, It is possible to prevent collision with the first end 103b.

12 is a cross-sectional view showing a state in which the discharge side support device of the present invention is fixed to the shell.

Referring to FIG. 12, the shell 101 may be provided with a fixing bracket 440 to which a fastening bolt 360 for fixing the discharge side support device 300 is fastened.

The fixing bracket 440 includes a shell fixing surface 441 fixed to the shell 101 and a bolt fixing surface 442 bent in the fixing surface 441 and extending in the radial direction of the compressor main body 100, . ≪ / RTI >

A fastening hole 444 for fastening the fastening bolt 360 is formed on the bolt fastening surface 442.

A buffer portion 380 may be coupled to the plate spring 310 to prevent the radial vibration of the compressor body 100 from being transmitted to the fastening bolts 360. At this time, the buffer part 380 may be formed integrally with the leaf spring 310 by inserting injection.

The buffer part 380 may be provided with a through hole 382 through which the fastening bolts 360 pass.

The fastening bolt 442 includes a cylindrical body 361, a fastening portion 363 extending from the end of the body 361 and fastened to the bolt fastening surface 442, And a head 365 projecting from the outer circumferential surface.

The diameter of the coupling portion 363 is smaller than the diameter of the body 361. The fastening portion 363 of the fastening bolt 442 is fastened to the bolt fastening surface 442 in a state of passing through the buffering portion 380. Then, the body 361 presses the bolt engagement surface 442.

Accordingly, the coupling portion 363 is not engaged with the buffer portion 380, and the body 361 maintains contact with the buffer portion 380.

Therefore, when the radial vibration of the compressor main body 100 is transmitted to the cushioning portion 380, the cushioning portion 380 sufficiently absorbs the vibration, ) Can be minimized.

A washer 370 may be interposed between the head 365 of the fastening bolt 360 and the buffer part 380.

10: Linear compressor 100: Compressor main body
101: shell 102: first shell cover
103: Second shell cover 300: Discharge side support device
400: stopper 402:
404: Restrictor 405: Dynamic damper

Claims (14)

Shell;
A shell cover covering the shell;
A compressor body accommodated in the shell, the compressor body for compressing the refrigerant;
A supporting device connected to the compressor body to support the compressor body; And
A stopper fixed to the shell cover and restricting movement of the support device,
The stopper includes a stopper body fixed to the shell cover,
And a dynamic damper extending from the stopper body for reducing vibration of the shell cover by self vibration. The method according to claim 1,
The dynamic damper including a first portion having a first width and a second portion extending in the first portion and having a second width greater than the first width. 3. The method of claim 2,
The stopper body includes a fixing part fixed to the shell cover,
And a restricting portion extending from the fixing portion toward the compressor main body,
And the first portion extends in a direction parallel to the fixed portion at a position spaced apart from the shell cover in the restricting portion. The method of claim 3,
Wherein the fixing portion is welded to at least three points of the shell cover. The method according to claim 1,
The shell cover includes a cover body,
And a contact portion extending from the cover body in a direction away from the compressor body and contacting the inner circumferential surface of the shell,
Wherein at least a portion of the cover body is positioned within the shell with the contact portion in contact with the shell. 6. The method of claim 5,
Wherein the cover body includes a first depression that is recessed in a direction away from the compressor body,
And a second depression recessed in a direction away from the compressor body at the first depression,
And the stopper body is fixed to the second depression. The method according to claim 1,
Wherein the plurality of dynamic damper devices are disposed symmetrically with respect to the center of the stopper body. The method according to claim 1,
Wherein the stopper includes a cylindrical restriction portion,
Wherein the supporting device includes a contact member capable of contacting the restricting portion,
And the contact member includes a circumferential portion formed at a diameter different from the diameter of the restriction portion and spaced apart from the restriction portion. 9. The method of claim 8,
Wherein the support device comprises a leaf spring,
Wherein the stopper further comprises a fixing part fixed to the shell cover,
Wherein the restricting portion extends from the fixing portion toward the compressor body,
And the circumferential portion can be in contact with the fixed portion during axial vibration of the compressor body in a state of being separated from the fixed portion. 10. The method of claim 9,
Wherein the support device includes a spring connection portion connecting the leaf spring to the compressor main body,
And the contact member is fastened to the spring connection portion by a fastening member. The method according to claim 1,
Wherein the shell cover includes a depression for preventing the dynamic damper from colliding with the dynamic damper during a vibration process thereof. The method according to claim 1,
Wherein the shell cover is a cover adjacent to the discharge side of the compressor body. Shell;
A compressor body accommodated in the shell, the compressor body for compressing the refrigerant;
A shell cover covering the shell on the discharge side of the compressor main body;
A fixed body fixed to the shell cover; And
And a dynamic damper which vibrates in a radial direction of the compressor body at a position spaced apart from the shell cover of the fixed body and vibrates to reduce vibration of the shell cover. 14. The method of claim 13,
The dynamic damper including a first portion having a first width and a second portion extending in the first portion and having a second width greater than the first width.

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