KR102253942B1 - Linear compressor and linear motor - Google Patents

Abstract

The present invention relates to a linear motor.
A linear motor according to an aspect includes: a first stator; A second stator disposed to be spaced apart from the first stator; And a permanent magnet movably disposed between the first stator and the second stator, wherein the first stator includes: a bobbin on which a coil is wound, and an insulating sheet surrounding the coil and the bobbin together; And a stator core surrounding the outside of the bobbin and the insulating sheet.

Description

Linear compressor and linear motor

The present specification relates to a linear compressor and a linear motor.

In general, a compressor is a mechanical device that receives power from a power generating device such as an electric motor or turbine and compresses air, refrigerant or other various operating gases to increase the pressure. It is widely used throughout.

If these compressors are classified largely, a reciprocating compressor that compresses the refrigerant while the piston linearly reciprocates inside the cylinder by forming a compression space through which the working gas is sucked and discharged between the piston and the cylinder. ), and a compression space in which working gas is sucked and discharged between the eccentrically rotated roller and the cylinder is formed, and the roller is rotated eccentrically along the inner wall of the cylinder to compress the refrigerant, and a rotary compressor and orbiting scroll A compressed space through which the working gas is sucked and discharged is formed between the scroll and the fixed scroll, and the orbiting scroll may be divided into a scroll compressor that compresses the refrigerant while rotating along the fixed scroll.

Recently, among the reciprocating compressors, in particular, linear compressors having a simple structure have been developed that can improve compression efficiency without mechanical loss due to motion conversion by allowing a piston to reciprocate linear motion.

In general, a linear compressor is configured to suck a refrigerant, compress it, and discharge it while a piston moves in a reciprocating linear motion inside a cylinder by a linear motor in a sealed shell.

Korean Patent Publication No. 2003-0066146 (published on Aug. 09, 2003), which is a prior document, discloses a stator of a linear motor.

The linear motor includes an inner stator, an outer stator, and a bobbin on which a coil is wound. And, the bobbin is coupled to the outer stator.

In a state in which the bobbin is coupled to the outer stator, the outermost layer of the coil and the outer stator are spaced apart. The distance between the outermost layer of the coil and the outer stator is an insulation distance.

However, when there is an insulation distance between the outermost layer of the coil and the outer, as in a conventional linear motor, the number of windings of the coil wound around the bobbin decreases, resulting in a low motor output.

An object of the present invention is to provide a linear motor and a linear compressor in which the number of windings of a coil can be increased.

A linear motor according to an aspect includes: a first stator; A second stator disposed to be spaced apart from the first stator; And a permanent magnet disposed between the first stator and the second stator, wherein the first stator is insulated with a plurality of insulating layers, and at least one of the plurality of insulating layers is polyamide-imide, A coil comprising at least one selected from the group consisting of polyimide, polyethylene naphthalate, polyester imide, polyamide, and polyphenylene sulfide; The coil is wound in multiple layers, and as an insulating material, selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, polyethylene naphthalate, polyamide-imide, and polyimide. A bobbin including at least one type; An insulating sheet surrounding the coil and the bobbin together; And a stator core surrounding the outside of the bobbin and the insulating sheet.

In addition, the bobbin includes a first portion disposed in a direction parallel to a moving direction of the permanent magnet, and a second portion and a third portion bent and extended at both ends of the first portion, and the insulating sheet is A distance between an end portion of the insulating sheet and the first portion in a state surrounding the second portion or the third portion may be smaller than a distance between the outermost layer of the coil and the first portion.

In addition, the second portion includes a first surface contacting the coil, a second surface opposite to the first surface, and a first connection surface connecting the first surface and the second surface, The insulating sheet may contact the second surface.

In addition, the third portion includes a third surface contacting the coil, a fourth surface opposite to the third surface, and a second connection surface connecting the third surface and the fourth surface, The insulating sheet may contact the fourth surface.

In addition, a contact area between the insulating sheet and the second surface or the fourth surface may be greater than a contact area between the insulating sheet and the first connection surface or the second connection surface.

In addition, the stator core may include a protrusion for pressing the insulating sheet toward the bobbin to fix the insulating sheet to the bobbin.

In addition, the protrusion may press the insulating sheet toward the second surface or the fourth surface.

In addition, the stator core includes a first core portion extending in a direction parallel to a moving direction of the permanent magnet, and a second core portion extending in a direction crossing the moving direction of the permanent magnet, and the second core portion It may include a coupling portion to be coupled to the bobbin.

In addition, the coupling portion may extend from the second core portion toward the bobbin.

In addition, the insulating sheet includes at least one selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, polyethylene naphthalate, polyamide-imide, and polyimide. can do.

A linear compressor according to another aspect includes a cylinder; A piston capable of reciprocating in the axial direction inside the cylinder; And a linear motor providing power to the piston, wherein the linear motor includes: a first stator; A second stator disposed to be spaced apart from the first stator; And a permanent magnet disposed between the first stator and the second stator, wherein the first stator is insulated with a plurality of insulating layers, and at least one of the plurality of insulating layers is polyamide-imide, poly A coil including at least one selected from the group consisting of imide, polyethylene naphthalate, polyester imide, polyamide, and polyphenylene sulfide; The coil is wound, and at least one selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, polyethylene naphthalate, polyamide-imide, and polyimide as insulating material Bobbin comprising a; A stator core surrounding the outside of the bobbin; And an insulating sheet disposed between the bobbin and the stator core and surrounding the bobbin and the coil.

In addition, the insulating sheet includes a first sheet portion in contact with the coil, and a second sheet portion and a third sheet portion extending in a direction crossing the moving direction of the permanent magnet on both sides of the first sheet portion, The second seat portion and the third seat portion may wrap the bobbin.

In addition, the stator core may include a protrusion for pressing at least one of the second sheet portion and the third sheet portion of the insulating sheet toward the bobbin.

In addition, the stator core may include one or more coupling portions to be coupled to the bobbin.

The linear motor according to another aspect is insulated with a plurality of insulating layers, but at least one of the plurality of insulating layers is polyamide-imide, polyimide, polyethylene naphthalate, polyester imide, polyamide and poly A coil including at least one type selected from the group consisting of phenylene sulfide; The coil is wound in multiple layers, and as an insulating material, selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, polyethylene naphthalate, polyamide-imide, and polyimide. A bobbin including at least one type; An insulating sheet surrounding the coil and the bobbin together; And a stator core surrounding the outer side of the bobbin and the insulating sheet, wherein the bobbin includes a first portion disposed in a direction parallel to a moving direction of the permanent magnet, and a second portion bent and extended from the first portion. Including, wherein the second portion includes a first surface in contact with the coil, a second surface opposite to the first surface, and a connection surface connecting the first surface and the second surface, A contact area between the insulating sheet and the second surface is larger than a contact area between the insulating sheet and the connection surface.

According to the proposed invention, since an insulating sheet having a thin thickness surrounds the bobbin on which the coil is wound, the insulation distance between the coil and the stator core can be reduced, and accordingly, the number of windings of the coil wound on the bobbin can be increased. I can. Accordingly, there is an advantage in that a temperature increase due to an overwork can be prevented and motor efficiency can be improved when the motor is operated.

In addition, since the insulating sheet is coupled to the bobbin by applying heat to the insulating sheet while the insulating sheet is wrapped around the bobbin, there is an advantage that a process for joining the insulating sheet is simplified.

1 is a cross-sectional view showing the configuration of a linear compressor according to an embodiment of the present invention
2 is a schematic cross-sectional view of a linear motor according to an embodiment of the present invention.
3 is a perspective view of a bobbin according to an embodiment of the present invention.
4 is a view showing a state in which an insulating sheet is wrapped around a bobbin according to an embodiment of the present invention
5 is a view showing a state in which the insulating sheet is coupled to the bobbin according to an embodiment of the present invention.

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, when it is determined that a detailed description of a related known configuration or function interferes with an understanding of an embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are for distinguishing the constituent element from other constituent elements, and the nature, order, or order of the constituent element is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the 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 cross-sectional view showing the configuration of a linear compressor according to an embodiment of the present invention, Figure 2 is a cross-sectional view schematically showing a linear motor according to an embodiment of the present invention, and Figure 3 is an embodiment of the present invention. It is a perspective view of the bobbin along.

1 to 3, the linear compressor 100 according to an embodiment of the present invention includes a shell 101 having a substantially cylindrical shape, and a first cover 102 coupled to one side of the shell 101. And a second cover 103 coupled to the other side.

For example, the linear compressor 100 may be installed on the product while lying in the horizontal direction, the first cover 102 is on the right side of the shell 101, the second cover 103 is the It may be located on the left side of the shell 101.

In a broader sense, the first cover 102 and the second cover 103 can be understood as one configuration of the shell 101.

The linear compressor 100 imparts driving force to the cylinder 120 provided inside the shell 101, the piston 130 and the piston 130 reciprocating and linearly moving inside the cylinder 120 It may further include a linear motor 200.

When the linear motor 200 is driven, the piston 130 may reciprocate at high speed. The operating frequency of the linear compressor 100 according to the present embodiment is approximately 100 Hz.

In detail, the linear compressor 100 may further include a suction unit 104 through which refrigerant is introduced and a discharge unit 105 through which the refrigerant compressed in the cylinder 120 is discharged.

The suction unit 104 may be coupled to the first cover 102, and the discharge unit 105 may be coupled to the second cover 103.

The refrigerant sucked through the suction part 104 flows into the piston 130 through the suction muffler 150. In the process of passing the refrigerant through the suction muffler 150, noise may be reduced. The suction muffler 150 may include a first muffler 151 and a second muffler 153 coupled to the first muffler 151. At least a portion of the suction muffler 150 may be located inside the piston 130.

The piston 130 may include a piston body 131 having 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 portion 132 may reciprocate outside the cylinder 120.

The piston 130 may be made of a non-magnetic aluminum material (aluminum or aluminum alloy). Since the piston 130 is made of an aluminum material, the magnetic flux generated by the linear motor 200 is transmitted to the piston 130 to prevent leakage to the outside of the piston 130. In addition, the piston 130, although not limited, may be formed by a forging method.

Meanwhile, the cylinder 120 may be made of a non-magnetic aluminum material (aluminum or aluminum alloy). In addition, the material composition ratio of the cylinder 120 and the piston 130, that is, the type and composition ratio may be the same.

Since the cylinder 120 is made of an aluminum material, the magnetic flux generated by the linear motor 200 is transmitted to the cylinder 120 to prevent leakage to the outside of the cylinder 120. In addition, the cylinder 120, although not limited, may be formed by an extrusion rod processing method.

In addition, since the piston 130 and the cylinder 120 are made of the same material (aluminum), the coefficients of thermal expansion are the same. During the operation of the linear compressor 100, a high temperature (approximately 100°C) environment is created inside the shell 100. Since the piston 130 and the cylinder 120 have the same coefficient of thermal expansion, the piston 130 And the cylinder 120 can be thermally deformed by the same amount.

As a result, since the piston 130 and the cylinder 120 are thermally deformed in different sizes or directions, it is possible to prevent interference with the cylinder 120 between movements of the piston and 130.

The cylinder 120 may accommodate at least a portion of the suction muffler 150 and at least a portion of the piston 130.

Inside the cylinder 120, a compression space P in which the refrigerant is compressed by the piston 130 may be formed. In addition, a suction hole 133 for introducing a refrigerant into the compression space P is formed in a front portion of the piston 130, and the suction hole 133 is selectively disposed in front of the suction hole 133. An opening intake valve 135 is provided. A fastening hole through which a predetermined fastening member is coupled may be formed in an approximately central portion of the suction valve 135.

In front of the compression space P, a discharge cover 160 forming a discharge space or discharge flow path of the refrigerant discharged from the compression space P and the discharge cover 160 is coupled to the compressed space P Discharge valve assemblies 161, 162, and 163 for selectively discharging the refrigerant compressed in may be provided.

The discharge valve assembly (161, 162, 163) is opened when the pressure of the compression space (P) is equal to or higher than the discharge pressure, and a discharge valve (161) for introducing the refrigerant into the discharge space of the discharge cover (160), A valve spring 162 provided between the discharge valve 161 and the discharge cover 160 to provide an elastic force in the axial direction, and a stopper 163 for limiting the amount of deformation of the valve spring 162 may be included. .

Here, the compression space P is a space formed between the suction valve 135 and the discharge valve 161. In addition, the suction valve 135 may be disposed on one side of the compression space P, and the discharge valve 161 may be disposed on the other side of the compression space P, that is, on the opposite side of the suction valve 135. have. In addition, the discharge valve 161 may be movably disposed at a front end of the cylinder 120.

In addition, the "axial direction" may be understood as a direction in which the piston 130 reciprocates or a direction in which the "permanent magnet" reciprocates.

In the "axial direction", a direction from the suction part 104 toward the discharge part 105, that is, a direction in which the refrigerant flows, is defined as "front", and the opposite direction is defined as "rear".

On the other hand, "radial direction" may be understood as a direction perpendicular to the direction in which the piston 130 reciprocates.

The stopper 163 may be seated on the discharge cover 160, and the valve spring 162 may be seated at the rear of the stopper 163. In addition, the discharge valve 161 is coupled to the valve spring 162, and the rear or rear portion of the discharge valve 161 is positioned to be supported on the front surface of the cylinder 120.

The valve spring 162 may include, for example, a plate spring.

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 sucked into the compression space (P). On the other hand, when the pressure in the compression space P is 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) is greater than or equal to the discharge pressure, the valve spring 162 is deformed to open the discharge valve 161, and the refrigerant is discharged from the compression space (P) to be discharged. It is discharged to the discharge space of the cover 160.

In addition, the refrigerant flowing through the discharge space of the discharge cover 160 flows into the roof pipe 165. The roof pipe 165 is coupled to the discharge cover 160 and extends to the discharge part 105, and guides the compressed refrigerant in the discharge space to the discharge part 105. For example, the roof pipe 178 has a shape wound in a predetermined direction and extends roundly, and is coupled to the discharge part 105.

The linear compressor 100 may further include a frame 110 coupled to the outside of the cylinder 120. The frame 110 is configured to fix the cylinder 120 and may be fastened to the cylinder 120 by a separate fastening member. The frame 110 is disposed to surround the cylinder 120. That is, the cylinder 120 may be accommodated inside the frame 110. In addition, the discharge cover 160 may be coupled to the front surface of the frame 110.

On the other hand, at least some of the gas refrigerant of the high-pressure gas refrigerant discharged through the open discharge valve 161 is directed toward the outer circumferential surface of the cylinder 120 through the space where the cylinder 120 and the frame 110 are combined. It can be fluid.

In addition, the refrigerant is introduced into the cylinder 120 through the nozzle unit 123 formed in the cylinder 120. The introduced refrigerant may flow into the space between the piston 130 and the cylinder 120 so that the outer circumferential surface of the piston 130 is spaced apart from the inner circumferential surface of the cylinder 120. Accordingly, the introduced refrigerant may function as a “gas bearing” that reduces friction with the cylinder 120 during the reciprocating movement of the piston 130.

The linear motor 200 includes a first stator 210 disposed to surround the cylinder 120, a second stator 250 disposed spaced apart from the first stator 210, and the second stator 250 A permanent magnet 260 positioned in a space between the first stator 210 and the second stator 250 may be included.

In the present specification, one of the first stator 210 and the second stator 250 may be an outer stator, and the other may be an inner stator.

In FIG. 1, for example, the first stator 210 is an outer stator, and the second stator 250 is an inner stator.

The permanent magnet 260 may linearly reciprocate by mutual electromagnetic force between the first stator 210 and the second stator 250. In addition, the permanent magnet 260 may be composed of a single magnet having one pole or a magnet having three poles. In addition, a plurality of permanent magnets 260 may be provided outside the second stator 250.

The permanent magnet 260 may be coupled to the piston 130 by a connection member 138. In detail, the connecting member 138 may be coupled to the piston flange portion 132 to extend by bending toward the permanent magnet 260. As the permanent magnet 260 reciprocates, the piston 130 may reciprocate in the axial direction together with the permanent magnet 260 by the connection member 138.

In addition, the linear motor 200 may further include a fixing member 262 for fixing the permanent magnet 260 to the connection member 138. The fixing member 262 may be formed by mixing glass fiber or carbon fiber and resin. The fixing member 262 is provided to surround the inner and outer sides of the permanent magnet 260, so that the permanent magnet 260 and the connection member 138 may be firmly maintained in a coupled state.

The first stator 210 includes a coil winding body 240 and 249, a plurality of stator cores 211 and 212 installed at regular intervals in a circumferential direction of the coil winding body 240 and 249, and the coil An insulating sheet 248 disposed between the winding bodies 240 and 249 and the plurality of stator cores 211 and 212 may be included.

The coil winding bodies 240 and 249 may include a bobbin 240 and a coil 249 wound in a circumferential direction of the bobbin 240. The cross section of the coil 249 may have a polygonal shape, and for example, may have a hexagonal shape.

The coil 249 may be covered with one or a plurality of insulating layers.

At least one insulating layer selected from the group consisting of polyamide-imide, polyimide, polyethylene naphthalate, polyester imide, polyamide, and polyphenylene sulfide is the one or more insulating layers of the one layer or the plurality of insulating layers. It can contain one type.

The insulating sheet 248 may have a film-like shape, for example.

The insulating sheet 248 includes at least one selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, polyethylene naphthalate, polyamide-imide, and polyimide. Can include.

The insulating sheet 248 may be contracted by supply of heat. Although not limited, the thickness of the insulating sheet 248 may be 0.3 mm or less.

The bobbin 240 may be formed of an insulating material. The bobbin 240 includes at least one selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, polyethylene naphthalate, polyamide-imide, and polyimide. can do.

The bobbin 240 includes the first part 241, a second part 242 bent at one side of the first part 241, and a third part bent at the other side of the first part 242 (243) may be included.

Some or all of the first part 241 may be disposed in a direction parallel to the moving direction of the permanent magnet 260. That is, some or all of the first portion 241 may extend in a direction parallel to the axial direction.

In addition, the second portion 242 and the third portion 243 may be disposed in a direction perpendicular to a moving direction of the permanent magnet 260. That is, the second portion 242 and the third portion 243 may extend in a direction perpendicular to the axial direction.

The coil 249 may be wound multiple times in a region formed by the first to third portions 241, 242, and 243.

The insulating sheet 248 may wrap the coil 249 and the bobbin 240 together. The insulating sheet 248 may contact the coil 249 and the bobbin 240.

The insulating sheet 248 may contact a plurality of surfaces of the second portion 242 of the bobbin 240. In addition, the insulating sheet 248 may contact a plurality of surfaces of the third portion 243 of the bobbin 240.

The second part 242 includes a first surface 242a contacting the coil 249, a second surface 242b facing the first surface 242a, and the first surface 242a. It may include a first connection surface 242c connecting the second surface 242b.

For example, the first and second surfaces 242a and 242b may extend in a direction crossing the moving direction of the permanent magnet 260.

In addition, the third portion 243 includes a third surface 243a contacting the coil 249, a fourth surface 243b facing the third surface 243a, and the third surface 243a. ) And a second connection surface 243c connecting the fourth surface 243b.

For example, the third and fourth surfaces 243a and 243b may extend in a direction crossing the moving direction of the permanent magnet 260.

Here, the second surface 242b, the fourth surface 243b, and the first and second connection surfaces 242c and 243c are outer surfaces of the bobbin 240.

The insulating sheet 248 may contact the second surface 242b, the fourth surface 243b, and the first and second connection surfaces 242c and 243c.

The insulating sheet 248 is in a direction crossing the moving direction of the permanent magnet 260 at both sides of the first sheet portion 248a in contact with the coil 249 and the first sheet portion 248a. It may include a second seat portion 248b and a third seat portion 248c extending.

The second seat portion 248a and the third seat portion 248c surround the bobbin 240.

For example, the second seat portion 248b may contact the second surface 242b of the second portion 242, and the third seat portion 248c is It can be in contact with the four sides 243b.

In this case, the contact area between the insulating sheet 248 and the second surface 242b of the second part 242 or the fourth surface 243b of the third part 243 is the insulating sheet 248 and the It is larger than the contact area of the connection surfaces 242c and 243c.

In the state where the insulating sheet 248 covers the second portion 242 or the third portion 243 of the bobbin 240, the end of the insulating sheet 248 (that is, the second sheet portion 248b) Alternatively, the distance between the end of the third seat portion 248c and the first portion 241 of the bobbin 240 is smaller than the distance between the outermost layer of the coil 249 and the first portion 241.

According to the present embodiment, since the insulating sheet 248 having a thin thickness surrounds the coil winding bodies 240 and 249, the insulating distance between the coil 249 and the stator cores 211 and 212 can be reduced. Accordingly, the number of windings of the coil 249 wound around the bobbin can be increased.

Accordingly, there is an advantage in that a temperature increase due to an overwork can be prevented and motor efficiency can be improved when the motor is operated.

In addition, since the insulating sheet 248 contacts the second surface 242b, the fourth surface 243b, and the connection surfaces 242c and 243c of the bobbin 240, insulation performance can be sufficiently secured.

Each of the plurality of stator cores 211 and 212 may include a first core block 211 and a second core block 212 coupled to the first core block 211. Each of the first core block 211 and the second core block 212 may be configured by stacking a plurality of laminations in a circumferential direction.

At least one of the plurality of stator cores 211 and 212 may include a protrusion 213 for pressing the insulating sheet 248 toward the bobbin to fix the insulating sheet 248 to the bobbin 240. have. For example, each of the first core block 211 and the second core block 212 may include the protrusion 213.

The protrusion 213 attaches the insulating sheet 248 to the second surface 242b of the second portion 242 of the bobbin 240 or the fourth surface of the third portion 243 of the bobbin 240 ( It can be pressurized to the 243b) side.

Each of the first core block 211 and the second core block 212 includes a first core portion 211a, 212a extending in a direction parallel to a moving direction of the permanent magnet 260, and the first core portion ( Second core portions 211b and 212b that are bent at 211a and 212a and extend in a direction crossing the moving direction of the permanent magnet 260 may be included.

In addition, the protrusion 213 may be provided on the second core portions 211b and 212b. A cross-sectional area of the protrusion 213 may decrease from the second core portions 211b and 212b toward the bobbin 240.

At this time, a plurality of protrusions 213 are disposed to be spaced apart in a circumferential direction to the second core portions 211b and 212b, or the one protrusion 213 is a circumferential direction of the second core portions 211b and 212b. It can be formed as long as a certain length.

At least one of the plurality of stator cores 211 and 212 may include a coupling portion 214 for coupling with the bobbin 240.

The coupling part 214 may extend toward the bobbin 240 from the second core parts 211b and 212b, for example. In addition, the coupling portion 214 may have a cross-sectional area of the second core portion 211b and 212b that decreases toward the bobbin 240, for example.

In this case, a plurality of coupling portions 214 are disposed to be spaced apart from each other in the circumferential direction on the second core portions 211a and 212a, or the one coupling portion 214 is formed of the second core portions 211a and 212a. It can be formed by a certain length in the circumferential direction.

The bobbin 240 may further include a partition part 247 for partitioning the plurality of stator cores 211 and 212.

In addition, the bobbin 240 may include a coupling mechanism 244 for coupling a terminal portion (not shown) of the coil 249.

The coupling mechanism 244 may be formed in the second portion 242 or the third portion 243. In FIG. 3, for example, it is shown that the coupling mechanism 244 is formed in the second portion 242 of the bobbin 240.

The coupling mechanism 244 includes an extension portion 245 extending in the axial direction from the bobbin 240, and extending in the radial direction of the bobbin 240 from the extension portion 245, and the terminal portion is coupled. It may include a coupling portion 246.

In this embodiment, a structure in which the terminal portion of the coil 249 is coupled to the coupling portion 246 may be implemented by a known technique, and thus a detailed description thereof will be omitted.

Hereinafter, the assembly process of the first stator will be described.

4 is a view showing a state in which an insulating sheet is wrapped around a bobbin according to an embodiment of the present invention, and FIG. 5 is a view showing a state in which the insulating sheet according to an embodiment of the present invention is coupled to the bobbin.

2 to 5, for assembling the first stator 210, a bobbin 240, an insulating sheet 248, and a plurality of stator cores are respectively provided.

Then, the coil 249 is wound around the bobbin 240. In addition, the insulating sheet 248 is wrapped around the bobbin 240 on which the coil 249 is wound.

The insulating sheet 248 may be manufactured in a cylindrical shape, for example. In this case, a part of the bobbin 240 may be accommodated in the insulating sheet 248.

The length of the insulating sheet 248 in the axial direction is greater than the distance between the second portion 242 and the third portion 243 of the bobbin 240.

In addition, one end of the insulating sheet 248 contacts the coupling part 246 while surrounding the bobbin 240. Accordingly, the coupling part 246 serves to determine the position of the insulating sheet 248 while the insulating sheet 248 is wrapped around the bobbin 240.

Alternatively, the insulating sheet 248 may be manufactured in a thin plate shape to wrap the bobbin 240 in the circumferential direction. Of course, even in this case, the length of the insulating sheet 248 in the axial direction may be greater than the distance between the second portion 242 and the third portion 243 of the bobbin 240.

When heat or hot air is provided to the insulating sheet 248 while the insulating sheet 248 covers the bobbin 240, the insulating sheet 248 is heat-shrunk to surround the bobbin 240, and the coil ( 249).

For example, the insulating sheet 248 may simultaneously wrap the second portion 242 and the third portion 243 of the bobbin 240.

Then, when the plurality of stator cores 211 and 212 are coupled to the bobbin 240, the assembly of the first stator 210 is completed. In this case, a state in which the insulating sheet 248 is coupled to the bobbin 240 may be stably maintained by the protrusions 213 provided on the stator cores 211 and 212.

According to the present invention, since the insulation sheet 248 is coupled to the bobbin 240 by applying heat to the insulation sheet 248 while the insulation sheet 248 is wrapped around the bobbin 240, the insulation There is an advantage in that the process for bonding the sheets 248 is simplified.

Meanwhile, the linear compressor 100 includes a supporter 137 supporting the piston 130 and a back cover 170 that is spaced apart from one side of the supporter 137 and is spring-coupled to the supporter 137. It may contain more.

The supporter 137 may be coupled to the piston flange portion 132 and the connection member 138 by a predetermined fastening member.

In front of the back cover 170, a suction guide part 155 is coupled. The suction guide part 155 guides the refrigerant sucked through the suction part 104 to flow into the suction muffler 150.

The linear compressor 100 may further include a plurality of springs 176 whose natural frequencies are adjusted so that the piston 130 can perform resonant motion.

The plurality of springs 176 include a first spring supported between the supporter 137 and the stator cover 270 and a second spring supported between the supporter 137 and the back cover 170 can do.

The linear compressor 100 may further include leaf springs 172 and 174 provided on both sides of the shell 101 so that the internal components of the compressor 100 are supported by the shell 101.

The leaf springs 172 and 174 may include a first leaf spring 172 coupled to the first cover 102 and a second leaf spring 174 coupled to the second cover 103. . For example, the first plate spring 172 may be fitted into a portion where the shell 101 and the first cover 102 are coupled, and the second plate spring 174 is 2 The cover 103 may be arranged to be fitted to a portion to which it is coupled.

Although the structure of the first stator, which is an outer stator, has been described above, it should be noted that, unlike this, the inner stator may be formed in the same structure as the first stator described above.

6 is a schematic view of a linear compressor according to another embodiment of the present invention.

This embodiment is the same as the previous embodiment with respect to the structure of the linear motor, but there is a difference in the lubrication method between the piston and the cylinder. Therefore, hereinafter, only characteristic parts of the present embodiment will be described.

Referring to FIG. 6, the linear compressor 300 according to the present embodiment may include a cylinder 320, a piston 330, a linear motor 400, and an oil supply device 360.

A predetermined oil may be stored in a shell forming the outer shape of the linear compressor 300. In addition, the oil supply device 360 for pumping oil may be provided under the shell. The oil supply device 360 may be operated by vibration generated as the piston 330 reciprocates and linearly moves to pump oil upward.

The linear compressor 300 may further include an oil supply pipe 365 for guiding the flow of oil from the oil supply device 360. The oil supply pipe 365 may extend from the oil supply device 360 to a space between the cylinder 320 and the piston 330.

The oil pumped from the oil supply device 360 is supplied to the space between the cylinder 320 and the piston 330 via the oil supply pipe 365 to perform cooling and lubrication.

In the above, even if all the constituent elements constituting the embodiments of the present invention have been described as being combined into one or operating in combination, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all of the constituent elements may be selectively combined and operated in one or more. In addition, terms such as "include", "consist of" or "have" described above mean that the corresponding component may be present unless otherwise stated, excluding other components. It should not be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art, unless otherwise defined, to which the present invention belongs. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related technology, and are not interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: linear compressor 110: frame
120: cylinder 130: piston
200: linear motor 210: first stator
240: bobbin 248: insulation sheet
249: coil 250: second stator
260: permanent magnet

Claims (15)

A first stator;
A second stator disposed to be spaced apart from the first stator; And
Including a permanent magnet disposed between the first stator and the second stator,
The first stator,
Insulated with a plurality of insulating layers, wherein at least one of the plurality of insulating layers is polyamide-imide, polyimide, polyethylene naphthalate, polyester imide, polyamide, and polyphenylene sulfide. A coil including at least one selected type;
The coil is wound in multiple layers, and as an insulating material, selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, polyethylene naphthalate, polyamide-imide, and polyimide. A bobbin including at least one type;
An insulating sheet surrounding the coil and the bobbin together; And
Including a stator core surrounding the outside of the bobbin and the insulating sheet,
The bobbin,
A first portion disposed in a direction parallel to the moving direction of the permanent magnet,
And a second portion bent and extended from the first portion,
The insulating sheet, a first sheet portion in contact with the coil,
And a second sheet part extending in a direction crossing the moving direction of the permanent magnet from the first sheet part and contacting the second part from the outside of the second part,
The stator core includes a first core portion extending in a direction parallel to a moving direction of the permanent magnet,
And a second core part extending in a direction crossing the moving direction of the permanent magnet and contacting a part of the second sheet part and the second part,
The second core part,
A protrusion for pressing the second sheet portion of the insulating sheet toward the second portion of the bobbin in order to fix the insulating sheet to the bobbin;
A linear motor extending toward the bobbin and including a coupling portion for coupling with a part of the second portion of the bobbin. The method of claim 1,
The second part is bent and extended at one end of the first part,
The bobbin further includes a third portion bent and extended from the other end of the first portion,
In a state in which the insulating sheet covers the second portion or the third portion, a distance between an end portion of the insulating sheet and the first portion is smaller than a distance between an outermost layer of the coil and the first portion. The method of claim 2,
The second portion, the first surface in contact with the coil,
A second surface opposite to the first surface,
Comprising a first connection surface connecting the first surface and the second surface,
The insulating sheet is a linear motor contacting the second surface. The method of claim 3,
The third part is a third surface in contact with the coil,
A fourth side opposite to the third side,
It includes a second connection surface connecting the third surface and the fourth surface,
The insulating sheet is a linear motor in contact with the fourth surface. The method of claim 4,
A linear motor having a contact area between the insulating sheet and the second surface or the fourth surface is greater than a contact area between the insulating sheet and the first connection surface or the second connection surface. The method of claim 4,
In the second core part,
A protrusion for pressing the third sheet portion of the insulating sheet toward the third portion of the bobbin to fix the insulating sheet to the bobbin;
A linear motor that extends toward the bobbin and includes a coupling portion for coupling with a third portion of the bobbin. The method of claim 6,
The protrusion is a linear motor for pressing the insulating sheet toward the second surface or the fourth surface. The method of claim 1,
The protrusion or the coupling portion is a linear motor having a cross-sectional area that decreases from the second core portion toward the bobbin. The method of claim 1,
A plurality of the protrusions or coupling portions are provided,
The plurality of protrusions or coupling portions are arranged to be spaced apart from each other in the circumferential direction of the second core portion, or are arranged to extend in the circumferential direction of the second core portion. The method of claim 1,
The insulating sheet is a linear comprising at least one selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, polyethylene naphthalate, polyamide-imide, and polyimide. motor. cylinder;
A piston capable of reciprocating in the axial direction inside the cylinder; And
Including a linear motor for providing power to the piston,
The linear motor,
A first stator;
A second stator disposed to be spaced apart from the first stator; And
Including a permanent magnet disposed between the first stator and the second stator,
The first stator,
Insulated with a plurality of insulating layers, wherein at least one of the plurality of insulating layers is polyamide-imide, polyimide, polyethylene naphthalate, polyester imide, polyamide, and polyphenylene sulfide. A coil including at least one selected type;
The coil is wound, and at least one selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, polyethylene naphthalate, polyamide-imide, and polyimide as insulating material Bobbin comprising a;
A stator core surrounding the outside of the bobbin; And
It is disposed between the bobbin and the stator core, and includes an insulating sheet surrounding the bobbin and the coil,
The bobbin includes a first portion disposed in a direction parallel to the moving direction of the permanent magnet,
Including a second portion bent and extended from the first portion,
The insulating sheet, a first sheet portion in contact with the coil,
A second seat portion extending in a direction crossing the moving direction of the permanent magnet from the first seat portion and contacting the second portion outside the second portion,
The stator core includes a first core portion extending in a direction parallel to a moving direction of the permanent magnet,
And a second core part extending in a direction crossing the moving direction of the permanent magnet and contacting a part of the second seat part and the second part,
The second core portion, a protrusion for pressing the second sheet portion of the insulating sheet toward the second portion of the bobbin to fix the insulating sheet to the bobbin,
A linear compressor comprising a coupling portion extending toward the bobbin and coupled to a portion of the second portion of the bobbin. The method of claim 11,
The second seat portion extends in a direction crossing the moving direction of the permanent magnet from one side of the first seat portion,
The insulating sheet,
Further comprising a third seat portion extending in a direction crossing the moving direction of the permanent magnet from the other side of the first seat portion,
The second seat portion and the third seat portion is a linear compressor surrounding the bobbin. The method of claim 12,
The second core portion of the stator core further comprises a protrusion for pressing the third sheet portion of the insulating sheet toward the bobbin. delete delete

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