US20060078443A1 - Linear compressor - Google Patents
Linear compressor Download PDFInfo
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- US20060078443A1 US20060078443A1 US11/165,380 US16538005A US2006078443A1 US 20060078443 A1 US20060078443 A1 US 20060078443A1 US 16538005 A US16538005 A US 16538005A US 2006078443 A1 US2006078443 A1 US 2006078443A1
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- Prior art keywords
- back cover
- initial value
- value control
- piston
- nut
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
- F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
Definitions
- An inlet 3 for inhaling fluid penetrates one end of the hermetic casing 2 , and a linear compression part is held by a main damper 4 and a subsidiary damper 5 set in the hermetic casing 2 , so as to absorb a shock.
- connection device is protruded in the stator cover toward the back cover, which is a bolt having a screw thread.
- the initial value control device is the initial value control nut combined with the bolt.
- the releasing protection device is a releasing protection nut combined with the bolt which is combined with the initial value control nut.
- the linear compressor comprises the stator cover fastened to the linear motor, the back cover positioned at a regular interval from the stator cover, the piston which linearly reciprocates by the linear motor, the spring supporting member mounted between the stator cover and the back cover, so as to gear with the piston, the main spring mounted between the spring supporting member and the back cover to elastically hold linear reciprocation of the piston, the bolt equipped in the stator cover to penetrate the spring supporting member and the back cover, the main nut positioned in the main spring to be combined with the bolt, and the subsidiary nut combined with the bolt in the back of the back cover.
- FIG. 3 is a lateral view of an initial value control device and a releasing protection device, according to the 1 st embodiment of the present invention
- the linear compression part is suspended by a main damper 52 and a subsidiary damper 53 in the hermetic casing 50 , so as to absorb a shock.
- the cylinder block 55 is located in a front of the outer stator 61 , and a stator cover 77 for covering the outer stator 61 is set in a rear of the outer stator 61 .
- the back cover 57 is spaced apart from the stator cover 77 by predetermined distance.
- the initial value control nut 83 pushes the 1 st main spring 80 through the back cover 57 .
- connection device One end of the connection device is fastened to the stator cover 77 , and the other is protruded toward the back cover 57 , which is the bolt 90 having the screw thread in its circumference.
- a spacer may be used for the initial value control device, which allows the spring supporting member 78 to be parted from the back cover 57 by predetermined distance.
- the linear compressor comprises the stator cover 77 fastened to the linear motor 60 , the back cover 57 spaced apart from the stator cover 77 by predetermined distance, the piston 58 which linearly reciprocates by the linear motor 60 , the spring supporting member 78 installed between the stator cover 77 and the back cover 57 , so as to gear with the piston 58 , the 1 st main spring 80 mounted between the spring supporting member 78 and the back cover 57 to elastically support linear reciprocation of the piston 58 , the connection device equipped in the stator cover 77 to penetrate the spring supporting member 78 and the back cover 57 , the initial value control device combined with the connection device and equipped in the 1 st main spring 80 , so as to control the initial position of the piston 58 , and the fixing device which allows the connection device and the back cover 57 to be fastened to each other in the rear of the back cover 57 .
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Disclosed herein is a linear compressor. In the present invention, an initial value control nut for controlling an initial position of a piston and a releasing protection nut for preventing the initial value control nut from releasing are combined in a bolt of a stator cover as a double nut method. The initial value control nut and the releasing protection nut are wound in the opposite direction. Therefore, it can prevent the initial value control nut from releasing, and can prevent the linear compressor from breaking down, thus improving the durability and the reliability.
Description
- 1. Field of the Invention
- The present invention relates to a linear compressor, more particularly, wherein an initial value control nut is prevented from releasing, which controls an initial position of a piston. Thus, the linear compressor has an effect on improving the durability and the reliability.
- 2. Description of the Related Art
- Generally, a linear compressor is a machine to inhale, to compress, and to discharge fluid by linearly reciprocating a piston within a cylinder, by device of linear driving force of a linear motor.
-
FIG. 1 shows the linear compressor, in accordance with the prior art. - The conventional linear compressor comprises a hermetic casing 2, and a linear compression part positioned in the hermetic casing 2 to compress fluid(see
FIG. 1 ). - An inlet 3 for inhaling fluid penetrates one end of the hermetic casing 2, and a linear compression part is held by a main damper 4 and a
subsidiary damper 5 set in the hermetic casing 2, so as to absorb a shock. - The linear compression part includes a
cylinder block 7 having thecylinder 6, a back cover 9 provided with aninhale pipe 8, thepiston 10 which moves back and forth within thecylinder 6, thelinear motor 20 which drives thepiston 10, and anexhale part 30 placed in a front of thecylinder 6 to discharge fluid compressed in thecylinder 6. - The
exhale part 30 is connected to an exhale pipe 31 which guides fluid drained from the cylinder to the outside of the hermetic casing. - The
linear motor 20 is divided by a stationary part and a movable part. The stationary part includes anouter stator 21, aninner stator 22, and acoil 23 with a magnetic field. The movable part includes amagnet 24 that linearly reciprocates by magnetic force around thecoil 23, and amagnet frame 25 which the magnet 14 is fastened to. - The
cylinder block 7 is located in a front of theouter stator 21, and astator cover 26 is set in its rear. - The
piston 10 receives linear driving force from themagnet 24, and linearly reciprocates within thecylinder 6. It is in the shape of a cylinder, which is open at its rear. An inhale passage where fluid is entered is provided therein. Aflange 11 is provided in its rear, so as to be fastened to themagnet frame 25. - In a rear of the
magnet frame 25, aspring supporting member 27 is placed to gear with themagnet frame 25. Thespring supporting member 27 has a main spring for elastically supporting linear reciprocation of thepiston 10. - The
spring supporting member 27 is disposed between thestator cover 26 and the back cover 9, being fastened to themagnet frame 25. The main spring includes a 1stmain spring 28 between thespring supporting member 27 and the back cover 9, and a 2ndmain spring 29 between thespring supporting member 27 and thestator cover 26. - A
bolt 32 protruded toward the back cover 9 is equipped in thestator cover 26, so as to penetrate thespring supporting member 27 and the back cover 9. - The
spring supporting member 27 and the back cover 9 respectively have a through hole to make thebolt 32 penetrate. After thebolt 32 penetrates thespring supporting member 27 and the back cover 9, it is combined with an initialvalue control nut 33 in a rear of the back cover 9, which controls an initial position of thepiston 10. - The conventional linear compressor with the above construction operates in the following sequence.
- In operation of the
linear motor 20, themagnet 24 linearly reciprocates, its linear driving force is delivered to thepiston 10 through themagnet frame 25. Thepiston 10 moves back and forth within thecylinder 6. - When the
piston 10 linearly reciprocates within thecylinder 6, fluid within the hermetic casing 2 is inhaled into theinhale pipe 8 of the back cover 9, is compressed in thecylinder 6 by thepiston 10, and is discharged to the outside of the hermetic casing 2 through theexhale part 30 and the exhale pipe 31. - The
piston 10 is supported by the 1stmain spring 28 and the 2ndmain spring 29, when thepiston 10 moves back and forth. - When the
piston 10 is assembled to move back and forth within thecylinder 6, thepiston 10 should occupy its initial position appropriately. The initial position of thepiston 10 is controlled, after inserting thespring supporting member 27, the 1stmain spring 28 and the back cover 9, in regular order, into thebolt 32, and combining with the initialvalue control nut 33 in the rear of the back cover 9. - The back cover 9 pushes the 1st
main spring 28, depending on an extent that the initialvalue control nut 33 is wound. As thespring supporting member 27 is transferred by the elasticity of the 1stmain spring 28, the position of thepiston 10 combined with thespring supporting member 27 is controlled. - However, in the conventional linear compressor, the initial
value control nut 33 is easily released by a vibration and the shock. When the initialvalue control nut 33 becomes released, thepiston 10 changes its initial position, resulting in influencing on compressibility. Furthermore, a separation of the initialvalue control nut 33 brings a mishap to the linear compressor. - In order to prevent the initial
value control nut 33 from releasing, the initialvalue control nut 33 is combined with thebolt 32, and is fixed bywelding 34. In that case, a restriction still remains that the initialvalue control nut 33 comes to released, caused by the trouble in welding. - Accordingly, it is an aspect of the present invention to provide a linear compressor, wherein an initial value control nut for controlling an initial position of a piston is not released, so that the initial position of the piston is not changed, thereby enhancing not only compressibility but also the durability and the reliability.
- The foregoing and other aspects are achieved by providing the linear compressor, based on the present invention, which comprises a stator cover fastened to a linear motor, a back cover positioned at a regular interval from the stator cover, the piston which linearly reciprocates by the linear motor, a spring supporting member mounted between the stator cover and the back cover, so as to gear with the piston, a main spring mounted between the spring supporting member and the back cover to elastically hold linear reciprocation of the piston, a connection device equipped in the stator cover to penetrate the spring supporting member and the back cover, an initial value control device combined with the connection device in a back of the back cover, so as to control the initial position of the piston, and a releasing protection device combined with the connection device, so as to prevent the initial value control device from releasing.
- The connection device is protruded in the stator cover toward the back cover, which is a bolt having a screw thread. The initial value control device is the initial value control nut combined with the bolt. The releasing protection device is a releasing protection nut combined with the bolt which is combined with the initial value control nut.
- Either the initial value control nut or the releasing protection nut is a right screw and the rest is a left screw.
- The bolt includes a rod which penetrates the spring supporting member, a main screw prolonged from the rod and provided with the screw thread to combine with the initial value control nut, and a subsidiary screw prolonged from the main screw and provided with the screw thread to combine with the releasing protection nut.
- The main screw and the subsidiary screw have a different diameter.
- According to an aspect of the present invention, the linear compressor comprises the stator cover fastened to the linear motor, the back cover positioned at a regular interval from the stator cover, the piston which linearly reciprocates by the linear motor, the spring supporting member mounted between the stator cover and the back cover, so as to gear with the piston, the main spring mounted between the spring supporting member and the back cover to elastically hold linear reciprocation of the piston, the connection device equipped in the stator cover to penetrate the spring supporting member and the back cover, the initial value control device combined with the connection device between the main spring and the back cover, so as to control the initial position of the piston, and a fixing device which allows the connection device and the back cover to be fastened to each other in the back of the back cover.
- The connection device is protruded in the stator cover toward the back cover, which is the bolt having the screw thread. The fixing device is a lock nut combined with the bolt in the back of the back cover.
- The initial value control device is the initial value control nut combined with the bolt, between the main spring and a front of the back cover.
- The initial value control nut includes a connection portion combined with the bolt, and a sheet portion radially protruded in the connection portion to support the main spring.
- According to an aspect of the present invention, the linear compressor comprises the stator cover fastened to the linear motor, the back cover positioned at a regular interval from the stator cover, the piston which linearly reciprocates by the linear motor, the spring supporting member mounted between the stator cover and the back cover, so as to gear with the piston, the main spring mounted between the spring supporting member and the back cover to elastically hold linear reciprocation of the piston, the bolt equipped in the stator cover to penetrate the spring supporting member and the back cover, the main nut positioned in the main spring to be combined with the bolt, and the subsidiary nut combined with the bolt in the back of the back cover.
- In the linear compressor of the present invention having the above-mentioned construction, the initial value control nut which controls the initial position of the piston and the releasing protection nut which prevents the initial value control nut from releasing are combined in the bolt of the stator cover as a double nut method, so that it is capable of preventing the initial value control nut from releasing, and of preventing the linear compressor from being out of order. Thus, the durability and the reliability of the linear compressor are enhanced.
- As either the initial value control nut or the releasing protection nut is the right screw, and the rest is the left screw, the initial value control nut and the releasing protection nut are wound in the opposite direction, thus enlarging an effect of preventing the initial value control nut from releasing.
- An inside diameter of the releasing protection nut is smaller than that of the initial value control nut, thus enlarging the effect of preventing the initial value control nut from releasing.
- The linear compressor of the present invention having the above-mentioned construction comprises the initial value control nut which controls the initial position of the piston between the main spring and the back cover, and the lock nut fastened to the bolt of the stator cover and the back cover in the back of the back cover. The initial value control nut and the lock nut are combined as the double nut method, therefore it prevents the initial value control nut from releasing, and enhances the durability and the reliability.
- After the initial position of the piston is adjusted by the initial value control nut, the back cover is installed in the bolt by the nut. Hereby, an installation of the back cover becomes easy.
- These and other objects and advantages of the present invention will become apparent and more readily appreciated from the following description of the embodiments of the invention, taken in conjunction with the accompanying drawings of which:
-
FIG. 1 is a sectional view of a linear compressor, according to the prior art; -
FIG. 2 is a sectional view of the linear compressor, according to a 1st embodiment of the present invention; -
FIG. 3 is a lateral view of an initial value control device and a releasing protection device, according to the 1st embodiment of the present invention; -
FIG. 4 is an enlarged sectional view of the initial value control device and the releasing protection device, according to the 1st embodiment of the present invention; -
FIG. 5 is a lateral view of a connection device, according to the 1st embodiment of the present invention; -
FIG. 6 is a lateral view of the initial value control device and a fixing device of the linear compressor, according to a 2nd embodiment of the present invention; -
FIG. 7 is an enlarged sectional view of the initial value control device and the fixing device, according to the 2nd embodiment of the present invention; -
FIG. 8 is a lateral view of the initial value control device and the fixing device of the linear compressor, according to a 3rd embodiment of the present invention. - Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.
-
FIG. 2 shows a linear compressor, according to a 1st embodiment of the present invention,FIGS. 3 and 4 show an initial value control device and a releasing protection device, according to the 1st embodiment of the present invention, andFIG. 5 shows a connection device, according to the 1st embodiment of the present invention. - As referring to FIGS. 2 to 5, the linear compressor, in accordance with the 1st embodiment of the present invention comprises a
hermetic casing 50, and a linear compression part positioned in thehermetic casing 50 to compress fluid. - One end of the
hermetic casing 50, aninlet 51 for inhaling fluid is installed through. The linear compression part is suspended by amain damper 52 and asubsidiary damper 53 in thehermetic casing 50, so as to absorb a shock. - The linear compression part includes a
cylinder block 55 provided with acylinder 54, aback cover 57 provided with aninhale pipe 56 facing theinlet 51, apiston 58 which moves back and forth in thecylinder 54, alinear motor 60 which generates driving force to make thepiston 58 linearly reciprocate, and an exhale part positioned in a front of thecylinder 54, so as to discharge fluid compressed in thecylinder 54. - The
linear motor 60 is divided by a stationary part and a movable part. The stationary part includes anouter stator 61, aninner stator 62, and acoil 63 with a magnetic field. The movable part includes amagnet 64 which linearly reciprocates by magnetic force around thecoil 63, and amagnetic frame 65 fastened to themagnet 64. - The
piston 58 is fastened to themagnet frame 65, in order to deliver linear driving force of themagnet 64 to thepiston 58. One end of thepiston 58 is inserted into thecylinder 54, and the other is fastened to themagnet frame 65. - The
piston 58 is in the shape of a cylinder, which is open at its rear. Aninhale passage 59 where fluid is entered is provided therein. Aflange 66 is provided in its rear, so as to be fastened to a front of themagnet frame 65. - In a front of the
piston 58, aninhale port 67 for making fluid inhale into a compression chamber of thecylinder 54 is formed, and aninhale valve 68 for opening and closing theinhale port 67 is installed. - The exhale part includes an
inner exhale cover 70 fastened to thecylinder block 55 and provided with an exhale hole, anexhale valve 71 supported in the inner exhale cover 70 by a spring to open and close the compression chamber of thecylinder 54, and an outer exhale cover 72 positioned at a regular interval from the outside of theinner exhale cover 70. Anexhale pipe 73 is connected to the outer exhale cover 72, which guides fluid drained from thecylinder 54 to the outside of thehermetic casing 50. - A
muffler 74 for reducing a noise is installed between a rear of thepiston 58 and theinhale pipe 56 of theback cover 57. Themuffler 74 includes amuffler body 75 placed in the rear of thepiston 58, and anentry pipe 76 prolonged from the muffler body to be inserted into thepiston 58. - The
cylinder block 55 is located in a front of theouter stator 61, and astator cover 77 for covering theouter stator 61 is set in a rear of theouter stator 61. Theback cover 57 is spaced apart from thestator cover 77 by predetermined distance. - A
spring supporting member 78 is installed between thestator cover 77 and theback cover 57, in order to gear with thepiston 58 and themagnet frame 65. Thespring supporting member 78 is combined with a back of themagnet frame 65. - The
spring supporting member 78 has a main spring to elastically hold linear reciprocation of thepiston 58. - The main spring includes a 1st
main spring 80 arranged between thespring supporting member 78 and theback cover 57, and a 2ndmain spring 81 arranged between thespring supporting member 78 and thestator cover 77. The 1stmain spring 80 is disposed in upper and lower sides of thehermetic casing 50, while the 2ndmain spring 81 is disposed in right and left sides of thehermetic casing 50. - The connection device is equipped in the
stator cover 77, which penetrates thespring supporting member 78 and theback cover 57, and allows thestator cover 77 to combine with thespring supporting member 78 and theback cover 57. - One end of the connection device is fastened to the
stator cover 77, and the other is protruded toward theback cover 57, which is abolt 82 having a screw thread in its circumference. - A through hole is formed in the
spring supporting member 78, where thebolt 82 is penetrated, so as to slide a front and rear direction in thebolt 82 by gearing with thepiston 58, when thepiston 58 moves back and forth. - In a rear of the
back cover 57, there are the initial value control device combined with thebolt 82 for controlling an initial position of thepiston 58, and the releasing protection device combined with thebolt 82 for preventing the initial value control device from releasing. - The initial value control device is an initial
value control nut 83 combined with thebolt 82, and the releasing protection device is a releasingprotection nut 84 combined with thebolt 82 which is combined with the initialvalue control nut 83. - As shown in
FIG. 5 , either the initialvalue control nut 83 or the releasingprotection nut 84 is a right screw, and the rest is a left screw. An example that the initialvalue control nut 83 is the right screw that is combined in a right direction in rotating, and the releasingprotection nut 84 is the left screw that is combined in a left direction in rotating is described below. - The
bolt 82 includes arod 85 which penetrates thespring supporting member 78, amain screw 86 prolonged from therod 85 and provided with the screw thread, so as to combine with the initialvalue control nut 83, and asubsidiary screw 87 prolonged from themain screw 86 and provided with the screw thread, so as to combine with the releasingprotection nut 84. - The
main screw 86 has the screw thread to be wound in the right direction, and thesubsidiary screw 87 has the screw thread to be wound in the left direction. - As shown in
FIG. 5 , themain screw 86 and thesubsidiary screw 87 have a different diameter. The diameter of thesubsidiary screw 87 is desirable to be smaller than that of themain screw 86. - An inside diameter of the initial value control nut and the releasing
protection nut 84 are respectively faced to an outside diameter of themain screw 86 and thesubsidiary screw 87. - A process of the linear compressor, according to the 1st embodiment of the present invention is described in the following.
- When the
linear motor 60 is in operation, themagnet 64 linearly reciprocates, and its linear motion is transmitted to thepiston 58 through themagnet frame 65. Thepiston 58 linearly reciprocates within thecylinder 54. - When the
piston 58 linearly reciprocates within thecylinder 54, fluid in thehermetic casing 50 is inhaled into theinhale pipe 56 of theback cover 57, is compressed in thecylinder 54 by thepiston 58, and is discharged to the outside of thehermetic casing 50 through the inner and the outer exhale cover 70, 72 and theexhale pipe 73. - When the
piston 58 moves backward, thespring supporting member 78 moves backward together with thepiston 58, and the 1stmain spring 80 becomes compressed. When thepiston 58 moves forward, thespring supporting member 78 moves forward, and the 2ndmain spring 81 becomes compressed. - Linear reciprocation of the
piston 58 is elastically held by the elasticity of the 1st and the 2ndmain spring - A method of adjusting the initial position of the
piston 58 is as follows. - After the
spring supporting member 78, the 1stmain spring 80 and theback cover 57, in regular order, are inserted into thebolt 82 fastened to thestator cover 77, the initialvalue control nut 83 is combined with themain screw 86 of thebolt 82 in the rear of theback cover 57. - As the initial
value control nut 83 is combined with themain screw 86 of thebolt 82, the initialvalue control nut 83 pushes the 1stmain spring 80 through theback cover 57. - While the
spring supporting member 78 combined to gear with thepiston 58 is moved by the elasticity of the 1stmain spring 80, the initial position of thepiston 58 is decided. - According to an extent that the initial
value control nut 83 is combined with thebolt 82, the initial position of thepiston 58 is controlled. - After the initial position of the
piston 58 is adjusted, the releasingprotection nut 84 is combined with thesubsidiary screw 87 of thebolt 82. - The initial
value control nut 83 and the releasingprotection nut 84 are combined in thebolt 82 as a double nut method, and the initialvalue control nut 83 and the releasingprotection nut 84 are wound in the opposite direction. Thus, it can prevent the initialvalue control nut 83 from releasing. - In describing a 2nd embodiment of the present invention, the identical reference number is conferred upon the same construction with the 1st embodiment of the present invention, referring to
FIG. 2 , and a detailed explanation is omitted. -
FIGS. 6 and 7 show the initial value control device and a fixing device of the linear compressor, according to the 2nd embodiment. - As referring to
FIGS. 6 and 7 , the linear compressor, according to the 2nd embodiment of the present invention comprises thestator cover 77 fastened to thelinear motor 60, theback cover 57 spaced apart from thestator cover 77 by predetermined distance, thepiston 58 which linearly reciprocates by thelinear motor 60, thespring supporting member 78 installed between thestator cover 77 and theback cover 57, so as to gear with thepiston 58, the 1stmain spring 80 mounted between thespring supporting member 78 and theback cover 57 to elastically support linear reciprocation of thepiston 58, the connection device equipped in thestator cover 77 to penetrate thespring supporting member 78 and theback cover 57, the initial value control device combined with the connection device between the 1stmain spring 80 and theback cover 57, so as to control the initial position of thepiston 58, and the fixing device which allows the connection device and theback cover 57 to be fastened to each other in the rear of theback cover 57. - The 2nd
main spring 81 is further comprised, which elastically holds linear reciprocation of thepiston 58, by being installed between thespring supporting member 78 and thestator cover 77. - One end of the connection device is fastened to the
stator cover 77, and the other is protruded toward theback cover 57, which is thebolt 90 having the screw thread in its circumference. - The initial value control device is the initial
value control nut 93 combined with thebolt 90, between the 1stmain spring 80 and a front of theback cover 57. - The initial
value control nut 93 includes aconnection portion 94 having the screw thread in its circumference, so as to combine thebolt 90, and asheet portion 95 radially protruded in theconnection portion 94, so as to support the 1st main spring. - The fixing device is a
lock nut 96 combined with thebolt 90 which penetrates theback cover 57 in the rear of theback cover 57. - The
bolt 90 includes therod 91 penetrating thespring supporting member 78, ascrew 92 prolonged from therod 91 and provided with the screw thread to combine with the initial value control nut and the lock nut. - The method of adjusting the initial position of the piston in the linear compressor, according to the 2nd embodiment of the present invention is as follows.
- After the
spring supporting member 78 and the 1stmain spring 80, in regular order, are inserted into thebolt 90 fastened to thestator cover 77, the initialvalue control nut 93 is combined with thebolt 90. - As the initial
value control nut 93 is combined with thebolt 90, the initialvalue control nut 93 pushes the 1stmain spring 80. While thespring supporting member 78 combined to gear with thepiston 58 is moved by the elasticity of the 1stmain spring 80, the initial position of thepiston 58 is decided. - The
spring supporting member 78 has a regular interval from theback cover 57 by the initialvalue control nut 93, the initial position of thepiston 58 combined with thespring supporting member 78 is decided. - Thereafter, the
back cover 57 is set in thebolt 90, and thelock nut 96 is combined with thebolt 90 in the rear of theback cover 57. - As the initial
value control nut 93 and thelock nut 96 are combined in thebolt 90 as the double nut method, it can prevent the initialvalue control nut 93 from releasing by mutual pushing power between the initialvalue control nut 93 and thelock nut 96. - Without defining the above embodiment, a spacer may be used for the initial value control device, which allows the
spring supporting member 78 to be parted from theback cover 57 by predetermined distance. - In describing a 3rd embodiment of the present invention, the identical reference number is conferred upon the same construction with the 1st embodiment of the present invention, referring to
FIG. 2 , and a detailed explanation is omitted. -
FIG. 8 shows the initial value control device and the fixing device of the linear compressor, according to the 3rd embodiment. - As shown in
FIG. 8 , the linear compressor, according to the 3rd embodiment of the present invention comprises thestator cover 77 fastened to thelinear motor 60, theback cover 57 spaced apart from thestator cover 77 by predetermined distance, thepiston 58 which linearly reciprocates by thelinear motor 60, thespring supporting member 78 installed between thestator cover 77 and theback cover 57, so as to gear with thepiston 58, the 1stmain spring 80 mounted between thespring supporting member 78 and theback cover 57 to elastically support linear reciprocation of thepiston 58, the connection device equipped in thestator cover 77 to penetrate thespring supporting member 78 and theback cover 57, the initial value control device combined with the connection device and equipped in the 1stmain spring 80, so as to control the initial position of thepiston 58, and the fixing device which allows the connection device and theback cover 57 to be fastened to each other in the rear of theback cover 57. - The 2nd
main spring 81 is further comprised, which elastically holds linear reciprocation of thepiston 58, by being installed between thespring supporting member 78 and thestator cover 77. - One end of the connection device is fastened to the
stator cover 77, and the other is protruded toward theback cover 57, which is thebolt 100 having the screw thread in its circumference. - The outside diameter of the initial value control device is smaller than the inside diameter of the 1st
main spring 80, and the initial value control device is the initialvalue control nut 103 combined with thebolt 100. - The fixing device is the
lock nut 104 combined with thebolt 100 in the rear of theback cover 57. - The
bolt 100 includes therod 101 penetrating thespring supporting member 78, thescrew 102 prolonged from therod 101 and provided with the screw thread to be combined with the initialvalue control nut 103 and thelock nut 104. - The method of adjusting the initial position of the piston in the linear compressor, according to the 3rd embodiment of the present invention is as follows.
- After the
spring supporting member 78 and the 1stmain spring 80, in regular order, are inserted into thebolt 100 fastened to thestator cover 77, the initialvalue control nut 103 is combined with thebolt 100. - When the
back cover 57 is inserted into thebolt 100 combined with the initialvalue control nut 103, the 1st main spring is supported by theback cover 57. - An assembling position of the
back cover 57 is decided, depending on the extent that the initialvalue control nut 103 is combined with thebolt 100, and theback cover 57 pushes the 1stmain spring 80. Thespring supporting member 78 is moved, and the initial position of thepiston 58 is decided. - Thereafter, the
lock nut 104 is combined with thebolt 100 that penetrates theback cover 57, releasing is protected by mutual pushing power of the initialvalue control nut 103 and thelock nut 104 in the front and the rear of theback cover 57. Furthermore, an initial position of theback cover 57 is firmly fixed. - The operational effects of the linear compressor, according to the present invention are described in the following.
- As apparent from the above description, in the linear compressor of the present invention, the initial value control nut for controlling the initial position of the piston and the releasing protection nut for preventing the initial value control nut from releasing are combined in the bolt of the stator cover as the double nut method, so that it is possible to prevent the initial value control nut from releasing, and to prevent the linear compressor from breaking down, thereby enhancing the durability and the reliability.
- As apparent from the above description, either the initial value control nut or the releasing protection nut is the right screw, and the rest is the left screw. Furthermore, the initial value control nut and the releasing protection nut are wound in the opposite direction, resulting in enlarging an effect of preventing the initial value control nut from releasing.
- As apparent from the above description, the inside diameter of the initial value control nut is smaller than that of the releasing protection nut, resulting in enlarging the effect of preventing the initial value control nut from releasing.
- As apparent from the above description, the linear compressor, in accordance with the present invention comprises the initial value control nut for controlling the initial position of the piston between the main spring and the back cover, and the lock nut for fastening the bolt of the stator cover and the back cover in the rear of the back cover, the initial value control nut and the lock nut are combined as the double nut method. With this configuration, it can prevent the initial value control nut from releasing, and can prevent the linear compressor from breaking down, thus improving the durability and the reliability.
- As apparent from the above description, the back cover is mounted in the bolt by the nut, after the initial position of the piston is adjusted by the initial value control nut. The back cover can be easily installed.
- Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in this embodiment without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
- The present disclosure relates to subject matter contained in Korean Application Nos. 10-2004-0081694, filed on Oct. 13, 2004, and 10-2004-0088791, filed on Nov. 3, 2004, the contents of which are herein expressly incorporated by reference in their entireties.
Claims (20)
1. A linear compressor comprising:
a stator cover fastened to a linear motor;
a back cover spaced apart from the stator cover by predetermined distance;
a piston which linearly reciprocates by the linear motor;
a spring supporting member installed between the stator cover and the back cover, so as to gear with the piston;
a main spring mounted between the spring supporting member and the back cover to elastically hold linear reciprocation of the piston;
a connection device equipped in the stator cover to penetrate the spring supporting member and the back cover;
an initial value control device combined with the connection device in a rear of the back cover, so as to control an initial position of the piston; and
a releasing protection device combined with the connection device, so as to prevent the initial value control device from releasing.
2. The linear compressor as set forth in claim 1 , wherein the connection device is a bolt protruded in the stator cover toward the back cover and provided with a screw thread.
3. The linear compressor as set forth in claim 2 , wherein the initial value control device is an initial value control nut combined with the bolt by screwing.
4. The linear compressor as set forth in claim 3 , wherein the releasing protection device is a releasing protection nut combined with the bolt by screwing, said bolt being combined with the initial value control nut.
5. The linear compressor as set forth in claim 4 , wherein either the initial value control nut or the releasing protection nut is a right screw, and the rest is a left screw.
6. The linear compressor as set forth in claim 4 , wherein the bolt includes a rod penetrating the spring supporting member, a main screw prolonged from the rod and provided with the screw thread to combine with the initial value control nut, and a subsidiary screw prolonged from the main screw and provided with the screw thread to combine with the releasing protection nut.
7. The linear compressor as set forth in claim 6 , wherein the main screw and the subsidiary screw have a different diameter.
8. The linear compressor as set forth in claim 7 , wherein the main spring further includes a spring arranged between the spring supporting member and the stator cover to elastically support linear reciprocation of the piston.
9. A linear compressor comprising:
a stator cover fastened to a linear motor;
a back cover spaced apart from the stator cover by predetermined distance;
a piston which linearly reciprocates by the linear motor;
a spring supporting member installed between the stator cover and the back cover, so as to gear with the piston;
a main spring mounted between the spring supporting member and the back cover to elastically hold linear reciprocation of the piston;
a connection device equipped in the stator cover to penetrate the spring supporting member and the back cover;
an initial value control device combined with the connection device between the main spring and the back cover, so as to control an initial position of the piston; and
a fixing device which allows the connection device and the back cover to be fastened to each other in a rear of the back cover.
10. The linear compressor as set forth in claim 9 , wherein the connection device is a bolt protruded in the stator cover toward the back cover and provided with a screw thread.
11. The linear compressor as set forth in claim 10 , wherein the fixing device is a lock nut combined with the bolt in the rear of the back cover.
12. The linear compressor as set forth in claim 11 , wherein the initial value control device is an initial value control nut combined with the bolt by screwing, between the main spring and a front of the back cover.
13. The linear compressor as set forth in claim 12 , wherein the initial value control nut includes a connection portion combined with the bolt, and a sheet portion radially protruded in the connection portion to support the main spring.
14. The linear compressor as set forth in claim 13 , wherein the bolt includes a rod penetrating the spring supporting member, a screw prolonged from the rod and provided with the screw thread to combine with the initial value control nut and the lock nut.
15. The linear compressor as set forth in claim 14 , wherein the main spring further includes a spring arranged between the spring supporting member and the stator cover to elastically support linear reciprocation of the piston.
16. A linear compressor comprising:
a stator cover fastened to a linear motor;
a back cover spaced apart from the stator cover by predetermined distance;
a piston which linearly reciprocates by the linear motor;
a spring supporting member installed between the stator cover and the back cover, so as to gear with the piston;
a main spring mounted between the spring supporting member and the back cover to elastically hold linear reciprocation of the piston;
a connection device equipped in the stator cover to penetrate the spring supporting member and the back cover;
an initial value control device combined with the connection device by being placed in the main spring, so as to control an initial position of the piston; and
a fixing device which allows the connection device and the back cover to be fastened to each other in a rear of the back cover.
17. The linear compressor as set forth in claim 16 , wherein the connection device is a bolt protruded in the stator cover toward the back cover and provided with a screw thread.
18. The linear compressor as set forth in claim 17 , wherein an outside diameter of the initial value control device is smaller than an inside diameter of the main spring, said initial value control device being an initial value control nut combined with the bolt by screwing.
19. The linear compressor as set forth in claim 18 , wherein the fixing device is a lock nut combined with the bolt in the rear of the back cover.
20. The linear compressor as set forth in claim 19 , wherein the main spring further includes a spring arranged between the spring supporting member and the stator cover to elastically support linear reciprocation of the piston.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020040081694A KR100579581B1 (en) | 2004-10-13 | 2004-10-13 | Linear compressor |
KR2004-81694 | 2004-10-13 | ||
KR1020040088791A KR100579585B1 (en) | 2004-11-03 | 2004-11-03 | Linear compressor |
KR2004-88791 | 2004-11-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060078443A1 true US20060078443A1 (en) | 2006-04-13 |
Family
ID=36145542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/165,380 Abandoned US20060078443A1 (en) | 2004-10-13 | 2005-06-24 | Linear compressor |
Country Status (1)
Country | Link |
---|---|
US (1) | US20060078443A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007046610A1 (en) * | 2005-10-18 | 2007-04-26 | Lg Electronics Inc. | Linear compressor |
US20090288810A1 (en) * | 2008-05-21 | 2009-11-26 | Asia Vital Components Co., Ltd. | Heat Radiating Fin |
EP2176550A2 (en) * | 2007-07-27 | 2010-04-21 | LG Electronics, Inc. | Linear compressor |
EP2207961A1 (en) * | 2007-10-24 | 2010-07-21 | LG Electronics, Inc. | Linear compressor |
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US2222823A (en) * | 1938-03-10 | 1940-11-26 | Fluidpoise Mfg Company Inc | Pumping apparatus |
US4319992A (en) * | 1980-10-28 | 1982-03-16 | Midwestern Industries, Inc. | Material separating machine |
US4724675A (en) * | 1985-02-20 | 1988-02-16 | Bendix France | Control device for a twin master cylinder |
US20040245863A1 (en) * | 2003-06-04 | 2004-12-09 | Lg Electronics Inc. | Outer stator for linear compressor motors |
-
2005
- 2005-06-24 US US11/165,380 patent/US20060078443A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2222823A (en) * | 1938-03-10 | 1940-11-26 | Fluidpoise Mfg Company Inc | Pumping apparatus |
US4319992A (en) * | 1980-10-28 | 1982-03-16 | Midwestern Industries, Inc. | Material separating machine |
US4724675A (en) * | 1985-02-20 | 1988-02-16 | Bendix France | Control device for a twin master cylinder |
US20040245863A1 (en) * | 2003-06-04 | 2004-12-09 | Lg Electronics Inc. | Outer stator for linear compressor motors |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007046610A1 (en) * | 2005-10-18 | 2007-04-26 | Lg Electronics Inc. | Linear compressor |
EP2176550A2 (en) * | 2007-07-27 | 2010-04-21 | LG Electronics, Inc. | Linear compressor |
CN101952590A (en) * | 2007-07-27 | 2011-01-19 | Lg电子株式会社 | Linear compressor |
EP2176550A4 (en) * | 2007-07-27 | 2012-02-15 | Lg Electronics Inc | Linear compressor |
US8561521B2 (en) | 2007-07-27 | 2013-10-22 | Lg Electronics Inc. | Linear compressor |
EP2207961A1 (en) * | 2007-10-24 | 2010-07-21 | LG Electronics, Inc. | Linear compressor |
EP2207961A4 (en) * | 2007-10-24 | 2010-12-01 | Lg Electronics Inc | Linear compressor |
US20110194957A1 (en) * | 2007-10-24 | 2011-08-11 | Yang-Jun Kang | Linear compressor |
US8496453B2 (en) * | 2007-10-24 | 2013-07-30 | Lg Electronics Inc. | Linear compressor |
US20090288810A1 (en) * | 2008-05-21 | 2009-11-26 | Asia Vital Components Co., Ltd. | Heat Radiating Fin |
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