EP1785626B1 - Linear compressor - Google Patents

Linear compressor Download PDF

Info

Publication number
EP1785626B1
EP1785626B1 EP06017242A EP06017242A EP1785626B1 EP 1785626 B1 EP1785626 B1 EP 1785626B1 EP 06017242 A EP06017242 A EP 06017242A EP 06017242 A EP06017242 A EP 06017242A EP 1785626 B1 EP1785626 B1 EP 1785626B1
Authority
EP
European Patent Office
Prior art keywords
piston
suction valve
suction
path
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP06017242A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1785626A1 (en
Inventor
Hong Hee Park
Seon Woong Hwang
Ki Chul Choi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1785626A1 publication Critical patent/EP1785626A1/en
Application granted granted Critical
Publication of EP1785626B1 publication Critical patent/EP1785626B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0016—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons with valve arranged in the piston

Definitions

  • the present invention relates to a linear compressor, and more particularly, to a linear compressor in which a suction valve performs opening/closing operations as it moves relative to a piston by an inertial force when the piston reciprocally moves.
  • a linear compressor is an apparatus configured in such a fashion that a piston reciprocally moves in a cylinder upon receiving a reciprocating drive force of a linear motor, to compress working-fluid received in the cylinder, for example, refrigerant.
  • the linear compressor is mainly used in refrigerators, etc.
  • FIG. 1 is a sectional view illustrating a conventional linear compressor.
  • FIG. 2 is a view of important parts of the conventional linear compressor, illustrating the advance movement of a piston.
  • FIG. 3 is a view of important parts of the conventional linear compressor, illustrating the retraction movement of the piston.
  • the conventional linear compressor comprises a shell 2 forming the outer appearance of the compressor, a cylinder block 4 and a back cover 6 which are arranged in the shell 2, and a compression unit provided between the cylinder block 4 and the back cover 6.
  • the compression unit serves to compress working-fluid by a desired compression ratio.
  • the shell 2 is provided with a fluid suction pipe 8 and a fluid discharge pipe 9, such that the working-fluid to be compressed is sucked into the compression unit from the outside of the shell 2, and then, is again discharged out of the shell 2 after being compressed in the compression unit.
  • the compression unit includes a cylinder 10 having a compression chamber 11 in which the working-fluid, having passed through the fluid suction pipe 8, is compressed, a piston 20 to compress the working-fluid received in the compression chamber 11 of the cylinder 10 while performing reciprocating movements in the cylinder 10, and a linear motor 30 to reciprocally move the piston 20.
  • the cylinder 10 is provided with a discharge valve assembly 12, such that the working-fluid, compressed in the compression chamber 11 of the cylinder 10, is discharged into the fluid discharge pipe 9 in accordance with the operation of the discharge valve assembly 12.
  • the piston 20 is internally formed with a suction path 21 for allowing the working-fluid, having passed through the fluid suction pipe 8, to be sucked into the cylinder 10. Also, the piston 20 has a suction valve 22 to open or close the suction path 21.
  • the suction valve 22 is an elastic member fastened to the piston 20 by means of a bolt.
  • the suction valve 22 is designed to be opened or closed as it is elastically deformed in accordance with a pressure difference between the suction path 21 of the piston 20 and the interior of the cylinder 10.
  • the linear motor 30 basically includes a stator 32, and a mover 34.
  • the mover 34 is adapted to reciprocally move while electromagnetically interacting with the stator 32.
  • the mover 34 is connected to the piston 20.
  • the compression unit further includes a main spring assembly 40 for providing the piston 20 with an elastic force in a reciprocating movement direction of the piston 20.
  • the main spring assembly 40 allows vibrations of the piston 20 to some extent when the piston 20 reciprocally moves.
  • the main spring assembly 40 consists of a first main spring 42 located between the back cover 6 and the piston 20, and a second main spring 44 located between the cylinder 10 and the linear motor 30 to be supported by the cylinder block 4 and the piston 20.
  • the piston 20 reciprocally moves in the cylinder 10 upon receiving the drive force of the linear motor 30. Then, the first and second main springs 42 and 44 are repeatedly compressed and tensioned in accordance with the reciprocating movements of the piston 20, thereby serving to allow vibrations of the piston 20 to some extent while causing the discharge valve assembly 12 and the suction valve 22 to be repeatedly opened or closed.
  • the working-fluid is sucked into the compression chamber 11 of the cylinder 10 through the fluid suction pipe 8, such that it is compressed to a high-pressure state by the piston 20 in the compression chamber 11 of the cylinder 10. Subsequently, the compressed working-fluid is discharged from the cylinder 10 through the discharge valve assembly 12, to be discharged out of the shell 2 through the fluid discharge pipe 9.
  • a problem of the above-described conventional linear compressor is that the suction valve 22 of the linear compressor is adapted to use an elastic force thereof, and therefore, may exhibit different elastic strains in accordance with a pressure difference between the suction path 21 of the piston 20 and the interior of the cylinder 10. This makes it impossible for the linear compressor to achieve improved constant compression efficiency, and results in deterioration of reliability.
  • the suction valve 22 using an elastic force may exhibit excessive elastic deformation as shown in FIG. 3 when a pressure difference between the suction path 21 of the piston 20 and the interior of the cylinder 10 is large or liquid phase working-fluid is introduced into the cylinder 10. Accordingly, there is a high risk in that the suction valve 22 may be plastically deformed or damaged due to an increased stress. Furthermore, the suction valve 22 suffers from deterioration of durability with the lapse of time, and consequently has a poor response property.
  • Another problem of the conventional linear compressor is that, when the bolt is used to fasten the suction valve 22 to the piston 20, a bolt head inevitably protrudes into the compression chamber 11 of the cylinder 10, increasing the dead volume of the compression chamber 11 of the cylinder 10. This results in deterioration of compression efficiency. Also, if the bolt head directly collides with the discharge valve assembly 12, the bolt head may be severely damaged, and excessive vibration and noise may be generated.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a linear compressor in which a suction valve performs opening/closing operations as it moves relative to a piston by an inertial force, rather than an elastic force, when the piston reciprocally moves, whereby the suction valve can always exhibit an even opening/closing stroke, achieving several advantageous effects, for example, improved constant compression efficiency, little risk of deformation or damage, high response and durability, and minimized vibration and noise.
  • the objects of the present invention are achieved by the features of the claims.
  • a linear compressor comprises: a piston adapted to reciprocally move in a cylinder, the piston being internally formed with a suction path; and a suction valve inserted in the suction path of the piston to move relative to the suction path, the suction valve performing opening/closing operations as it moves relative to the piston when the piston reciprocally moves.
  • a suction valve is adapted to open or close the suction path of the piston as it moves relative to the suction path when the piston reciprocally moves, the suction valve including: a suction valve body formed with an elongated slot extending in a reciprocating movement direction of the piston; and a suction valve guide pin fitted through the piston and the slot of the suction valve body to move relative to the suction valve body while being fixed to the piston.
  • the suction valve body has a head portion disposed to protrude out of the suction path of the piston; and a body portion configured to move into or out of the suction path of the piston, the body portion being configured to have approximately the same diameter as a diameter of the suction path of the piston, and the body portion having holes for allowing the passage of working-fluid.
  • the holes of the body portion may be integrally formed with a slot of the suction valve body.
  • the piston may be also formed with a suction valve recess such that the suction valve is completely inserted into the piston.
  • the piston may be also formed with a suction valve recess such that the suction valve is completely inserted into the piston, the suction valve recess being configured to gradually widen away from the suction path of the piston toward a distal end of the piston.
  • the piston may be also formed with a suction valve recess such that the suction valve is completely inserted into the piston, the suction valve recess having an inclined region where it comes into contact with the suction valve; and the suction valve has an inclined surface to come into surface contact with the inclined region of the suction valve recess when the suction valve is inserted into the suction valve recess.
  • a linear compressor comprising: a piston adapted to reciprocally move in a cylinder, the piston being internally formed with a suction path; and a suction valve adapted to open or close the suction path of the piston as it moves relative to the suction path when the piston reciprocally moves, the suction valve including: a suction valve body formed with an elongated slot extending in a reciprocating movement direction of the piston; and a suction valve guide pin fitted through the piston and the slot of the suction valve body to move relative to the suction valve body while being fixed to the piston, wherein: the piston is also formed with a suction valve recess such that the suction valve is completely inserted into the piston, the suction valve recess having an inclined region where it comes into contact with the suction valve; and the suction valve has an inclined surface to come into surface contact with the inclined region of the suction valve recess when the suction valve is inserted into the suction valve rece
  • the suction valve is inserted in the suction path of the piston to move relative to the suction path, thereby performing opening/closing operations as it moves relative to the piston by an inertial force when the piston reciprocally moves, whereby the suction valve always exhibits an even opening/closing stroke, and therefore, can achieve various advantageous effects, such as for example, improved constant compression efficiency, little deformation or damage due to excessive stress applied to the suction valve, an improvement in response and durability, and minimized vibration and noise caused by the opening/closing operations of the suction valve.
  • the piston is formed with the suction valve recess such that the suction valve is completely inserted into the piston when the suction valve closes the suction path of the piston, the dead volume of the cylinder chamber of the cylinder can be more effectively eliminated, and there is no risk of interference between the suction valve and a discharge valve assembly.
  • the head portion of the suction valve can come into surface contact with the suction valve recess of the piston, whereby the suction valve can smoothly move into or out of the suction valve recess of the piston, and in particular, the head portion of the suction valve can achieve an improved stiffness.
  • FIG. 4 is a sectional view illustrating a linear compressor according to a first example.
  • FIG. 5 is an exploded perspective view illustrating a suction valve and a piston included in the linear compressor according to the first example.
  • FIGS. 6 to 9 are views illustrating, in this sequence, an initially retracted state, a completely retracted state, an initially advanced state, and a completely advanced state of the piston of the linear compressor according to the first example.
  • the linear compressor according to the first example comprises a shell 50 configured to allow introduction and discharge of working fluid, a cylinder block 60 and a back cover 62 arranged in the shell 50, and a compression unit P provided between the cylinder block 60 and the back cover 62.
  • the working-fluid, introduced into the shell 50 is compressed by a desired compression ratio while passing through the compression unit P, thereby being discharged in a high-pressure state.
  • a fluid suction pipe 52 is connected to the shell 50 such that the working-fluid is sucked into the shell 50 from an external station.
  • a fluid discharge pipe 54 is connected to the shell 50 such that the compressed working-fluid, discharged from the compression unit P, is guided out of the shell 50.
  • a damper 56 is mounted in the shell 50 to elastically support the compression unit P.
  • a lubricating oil pumping device 58 is arranged in the shell 50 to pump lubricating oil G in the bottom of the shell 50 to the compression unit P.
  • the back cover 62 is located closer to the fluid suction pipe 52 than the cylinder block 60.
  • a muffler (not shown) is mounted to the back cover 62 to reduce the noise of the working-fluid generated when the working-fluid passes through the fluid suction pipe 52.
  • the compression unit P includes a linear motor 90 to generate a reciprocating drive force, a cylinder 70 fixedly mounted to the cylinder block 60, the cylinder 70 internally defining a compression chamber 71 for the compression of the working-fluid, a piston 80 which performs reciprocating movements in the cylinder 70 using the reciprocating drive force of the linear motor 90 to compress the working-fluid received in the compression chamber 71 of the cylinder 70, and first and second resonance springs 110 and 112 to allow vibrations of the piston 80 to some extent in a reciprocating movement direction of the piston 80 when the piston 80 reciprocally moves.
  • the linear motor 90 is located around the cylinder 70, and is supported by the cylinder block 60 and the back cover 62.
  • the linear motor 90 basically consists of a mover connected to the piston 80 to work in conjunction with the piston 80, and a stator adapted to electromagnetically interact with the mover for inducing reciprocating movements of the mover.
  • the mover includes a magnet 92 arranged inside the stator in a reciprocally movable manner, and a magnet frame 94 for the fixation of the magnet 92, the magnet frame 94 being connected to the piston 80 to work in conjunction with the piston 80.
  • the magnet frame 94 serves to transmit the reciprocating drive force of the linear motor 90 to the piston 80.
  • the stator includes an outer core 95 located on the outer circumference of the mover, a coil 96 provided in the outer core 95 to generate a magnetic field, and an inner core 97 located on the inner circumference of the mover.
  • the cylinder 70 has a cylindrical structure having open front and rear ends.
  • the piston 80 is inserted into the open rear end of the cylinder 70. After being compressed in the compression chamber 71 of the cylinder 70, the working-fluid is discharged from the open front end of the cylinder 70.
  • the open front end of the cylinder 70 is covered with the discharge valve assembly 75, such that the working-fluid, compressed in the compression chamber 71 of the cylinder 70, is discharged into the fluid discharge pipe 54.
  • the discharge valve assembly 75 includes a valve cover 76 mounted to cover the open front end of the cylinder 70 while being connected to the fluid discharge pipe 54, a discharge valve body 77 mounted to reciprocally move in front of the open front end of the cylinder 70 within the discharge valve cover 76, and a discharge valve spring 78 to elastically support the discharge valve body 77.
  • the discharge valve cover 76 may have a dual structure. Specifically, the discharge valve cover 76 includes an inner cover 76b having a discharge hole 76a for the discharge of the working-fluid, and an outer cover 76c located at the outside of the inner cover 76b to surround the inner cover 76b, the outer cover 76c being connected to the fluid discharge pipe 54.
  • a suction path 81 is formed in the piston 80 to extend longitudinally throughout the interior of the piston 80, such that the suction path 81 is connected to both the fluid suction pipe 52 and the compression chamber 71 of the cylinder 70.
  • the suction path 81 of the piston 80 is designed to be selectively connected to the compression chamber 71 of the cylinder 70 by the suction valve 84, which performs opening/closing operations in accordance with the reciprocating movements of the piston 80.
  • the suction valve 84 is disposed in the suction path 81 of the piston 80 such that it is movable relative to the suction path 81.
  • the suction valve 84 is able to perform opening/closing operations as it moves relative to the piston 80 by an inertial force when the piston 80 reciprocally moves.
  • the suction valve 84 includes a suction valve body 85 inserted in the suction path 81 of the piston 80 to move relative to the suction path 81, the suction valve body 85 having an elongated slot 85' extending in the reciprocating movement direction of the piston 80, and a suction valve guide pin 86 fitted through the piston 80 and the slot 85' of the suction valve body 85 to move relative to the slot 85' while being fixed to the piston 80.
  • the suction valve body 85 has a head portion 85a disposed to protrude out of the suction path 81 of the piston 80, and a body portion 85b inserted in the suction path 81 of the piston 80 to move into or out of the suction path 81.
  • the head portion 85a of the suction valve body 85 may take the form of a disk having a diameter smaller than a diameter of the piston 80, but larger than a diameter of the suction path 81 of the piston 80.
  • the head portion 85a of the suction valve body 85 has a flat outer surface 85a' at an opposite side of the piston 80, to ensure even compression of the working-fluid in the compression chamber 71 of the cylinder 70.
  • the body portion 85b of the suction valve body 85 may have a D-cut shape, in order to allow the working-fluid to pass through a space between the body portion 85b of the suction valve body 85 and the suction path 81 of the piston 80 when the suction valve 84 moves to open the suction path 81 of the piston 80.
  • the body portion 85b of the suction valve body 85 has a partially cut-away cross sectional shape of a circle having approximately the same size as the suction path 81 of the piston 80.
  • the slot 85' is formed in the body portion 85b of the suction valve body 85, such that the suction valve guide pin 86 is fitted through the slot 85' to move relative to the slot 85'.
  • one end of the slot 85' toward the head portion 85a of the suction valve body 85 is a top dead point, and the opposite end of the slot 85' is a bottom dead point.
  • the suction valve guide pin 86 has a rod shape having a diameter smaller than a length of the slot 85' of the suction valve 84.
  • the suction valve guide pin 86 may be arranged in the piston 80 in a radial direction of the piston 80.
  • the suction valve guide pin 86 may be press fitted to the piston 80.
  • the suction valve guide pin 86 may have approximately the same length as a diameter of the piston 80 such that opposite ends thereof straddle the piston 80.
  • the suction valve 84 is configured such that it can be completely inserted in the piston 80 when it is desired to close the suction path 81 of the piston 80.
  • a suction valve recess 87 is formed in a front end region of the piston 80 to be connected to the suction path 81 of the piston 80, such that the head portion 85a of the suction valve body 85 is inserted in the suction valve recess 87.
  • the suction valve recess 87 may be formed in the piston 80 such that it gradually widens from the suction path 81 of the piston 80 toward a front distal end of the piston 80.
  • the magnet 92 reciprocally moves along with the magnet frame 94 via the electromagnetic interaction of both the stator and the mover.
  • the resulting reciprocating drive force of the linear motor 90 is transmitted to the piston 80 that is connected to the magnet frame 94.
  • the piston 80 reciprocally moves in the cylinder 70 upon receiving the drive force of the linear motor 90.
  • the first and second main springs 110 and 112 are repeatedly compressed and tensioned, causing the suction, compression, discharge of the working-fluid to be repeated in this sequence.
  • the suction valve 84 shows a relative movement to the piston 80 by an inertial force, thereby being protruded from the piston 80 into the compression chamber 71 of the cylinder 70.
  • the suction valve 84 is completely inserted in the piston 80, and thus, the suction valve guide pin 86 of the suction valve 84 is located at the top dead point of the slot 85' of the suction valve 84 (See. FIG. 4 ).
  • the suction valve guide pin 86 moves along the slot 85' of the suction valve 84 from the top dead point to the bottom dead point of the slot 85'.
  • the suction valve 84 shows a relative movement to the piston 80 by an inertial force, thereby being inserted into the piston 80.
  • the piston 80 begins to advance into the compression chamber 71 of the cylinder 70, as shown in FIG. 8 , the piston 80 approaches the suction valve 84, and simultaneously, the suction valve 84 retracts toward the piston 80 by the pressure of the working-fluid in the compression chamber 71 of the cylinder 70. Thereby, the suction valve 84 is rapidly inserted into the piston 80, thereby closing the suction path 81 of the piston 80.
  • the suction valve guide pin 86 moves along the slot 85' of the suction valve 84 from the bottom dead point to the top dead point of the slot 85'. If the piston 80 continuously advances after the suction valve guide pin 86 reaches the top dead point of the slot 85' of the suction valve 84, the suction valve 84 advances along with the piston 80.
  • suction valve 84 is continuously inserted in the piston 80 by the pressure of the working-fluid in the compression chamber 71 of the cylinder 70.
  • the discharge valve assembly 75 opens the compression chamber 71 of the cylinder 70 in accordance with the force equilibrium relationship between the pressure of the working-fluid in the compression chamber 71 of the cylinder 70 and the discharge valve spring 78 of the discharge valve assembly 75.
  • the working-fluid, compressed in the compression chamber 71 of the cylinder 70, is discharged out of the shell 50 by passing through the discharge cover 76 and the fluid discharge pipe 54 in this sequence.
  • FIGS. 10 and 11 are configuration views of important parts of a linear compressor according to a second example, FIG. 10 illustrating a retracted state of a piston included in the linear compressor, and FIG. 11 illustrating an advanced state of the piston.
  • the linear compressor according to the second example employs a suction valve 150, which includes a suction valve body 152 inserted in a suction path 161 of a piston 160 to move relative to the suction path 161, the suction valve body 152 having an elongated slot 150' extending in a reciprocating movement direction of the piston 160, and a suction valve guide pin 154 fitted through the piston 160 and the slot 150' of the suction valve body 152 to move relative to the slot 150' while being fixed to the piston 160.
  • a suction valve 150 which includes a suction valve body 152 inserted in a suction path 161 of a piston 160 to move relative to the suction path 161, the suction valve body 152 having an elongated slot 150' extending in a reciprocating movement direction of the piston 160, and a suction valve guide pin 154 fitted through the piston 160 and the slot 150' of the suction valve body 152 to move relative to the slot 150' while being fixed to the piston 160.
  • the suction valve body 152 may be divided into a head portion 152a disposed to protrude out of the suction path 161 of the piston 160, and a body portion 152b configured to have a diameter smaller than a diameter of the suction path 161 of the piston 160 to move into or out of the suction path 161.
  • the suction valve 150 may further include a guide for allowing the center of the suction valve 150 to continuously align with the center of the piston 160 during a relative movement between the suction valve 150 and the piston 160.
  • FIGS. 12 and 13 are configuration views of important parts of a linear compressor according to the present invention, FIG. 12 illustrating a retracted state of a piston included in the linear compressor, and FIG. 13 illustrating an advanced state of the piston.
  • the linear compressor according to the invention employs a suction valve 200, which includes a suction valve body 202 inserted in a suction path 211 of a piston 210 to move relative to the suction path 211, the suction valve body 202 having an elongated slot 200' extending in a reciprocating movement direction of the piston 210, and a suction valve guide pin 204 fitted through the piston 210 and the slot 200' of the suction valve body 202 to move relative to the slot 200' while being fixed to the piston 210.
  • a suction valve 200 which includes a suction valve body 202 inserted in a suction path 211 of a piston 210 to move relative to the suction path 211, the suction valve body 202 having an elongated slot 200' extending in a reciprocating movement direction of the piston 210, and a suction valve guide pin 204 fitted through the piston 210 and the slot 200' of the suction valve body 202 to move relative to the slot 200' while being fixed to the piston 210.
  • the suction valve body 202 is divided into a head portion 202a disposed to protrude out of the suction path 201 of the piston 210, and a body portion 202b configured to have approximately the same diameter as a diameter of the suction path 211 of the piston 210 to move into or out of the suction path 211, the body portion 202b having holes 202c for the passage of the working-fluid in the suction path 211 of the piston 210.
  • the body portion 202b of the suction valve body 202 internally defines a path 202d, which connects the holes 202c of the suction valve body 202 to the suction path 211 of the piston 210.
  • the holes 202c of the suction valve body 202 may be integrally formed with the slot 200' of the suction valve 200.
  • FIGS. 14 and 15 are configuration views of important parts of a linear compressor according to a third example, FIG. 14 illustrating a retracted state of a piston included in the linear compressor, and FIG. 15 illustrating an advanced state of the piston.
  • the linear compressor according to the third example includes a suction valve 250, which includes a suction valve body 252 inserted in a suction path 261 of a piston 260 to move relative to the suction path 261, the suction valve body 252 having an elongated slot 250' extending in a reciprocating movement direction of the piston 260, and a suction valve guide pin 254 fitted through the piston 260 and the slot 250' of the suction valve body 252 to move relative to the suction valve body 252 while being fixed to the piston 260.
  • the piston 260 is formed in a front end region thereof with a suction valve recess 262 to be connected to the suction path 261 of the piston 260, such that a head portion 252a of the suction valve body 252 is inserted in the suction valve recess 262.
  • the suction valve recess 262 of the piston 260 may have an inclined structure on at least the region where the piston 260 comes into contact with the suction valve 250. Specifically, the suction valve recess 262 of the piston 260 may gradually widen away from the suction path 261 of the piston 260 toward a front distal end of the piston 260.
  • the suction valve body 252 may be divided into the head portion 252a disposed to protrude out of the suction path 261 of the piston 260, and a body portion 252b having a D-cut shape and adapted to move into or out of the suction path 261 of the piston 260.
  • the head portion 252a of the suction valve body 252 has an inclined outer surface, such that the head portion 252a comes into surface contact with the suction valve recess 262 of the piston 160 when it is completely inserted into the suction valve recess 262 of the piston 260.
  • the present invention provides a linear compressor having the following several advantages.
  • the linear compressor of the present invention is configured in such a fashion that a suction valve is inserted in a suction path of a piston to move relative to the suction path, thereby performing opening/closing operations as it moves relative to the piston by an inertial force when the piston reciprocally moves.
  • the suction valve configured as stated above can always exhibit an even opening/closing stroke, and therefore, can achieve various advantageous effects, such as for example, improved constant compression efficiency, little deformation or damage due to excessive stress applied to the suction valve, an improvement in response and durability, and minimized vibration and noise caused by the opening/closing operations of the suction valve.
  • a suction valve guide pin is provided in the piston in a radial direction of the piston, to couple the suction valve to the piston.
  • the use of the suction valve guide pin has the effects of minimizing the dead volume of a compression chamber of a cylinder, enabling the suction valve to be easily mounted to the piston even if the piston has a small diameter, and reducing the flow resistance of working-fluid due to the existence of the suction valve.
  • the piston is formed with a suction valve recess such that the suction valve is completely inserted into the piston when the suction valve closes the suction path of the piston. This more effectively eliminates the dead volume of the cylinder chamber of the cylinder, and can prevent interference between the suction valve and a discharge valve assembly.
  • the head portion of the suction valve can come into surface contact with the suction valve recess of the piston, whereby the suction valve can smoothly move into or out of the suction valve recess of the piston, and in particular, the head portion of the suction valve can achieve an improved stiffness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP06017242A 2005-11-14 2006-08-18 Linear compressor Expired - Fee Related EP1785626B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20050108699 2005-11-14

Publications (2)

Publication Number Publication Date
EP1785626A1 EP1785626A1 (en) 2007-05-16
EP1785626B1 true EP1785626B1 (en) 2010-10-13

Family

ID=37692607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06017242A Expired - Fee Related EP1785626B1 (en) 2005-11-14 2006-08-18 Linear compressor

Country Status (5)

Country Link
US (1) US20070110600A1 (zh)
EP (1) EP1785626B1 (zh)
JP (1) JP5073989B2 (zh)
CN (1) CN1966979A (zh)
DE (1) DE602006017489D1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018123258B3 (de) * 2018-09-21 2020-03-26 Karlsruher Institut für Technologie Kolben, Kolbenverdichter und Pumpe

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100677290B1 (ko) * 2005-12-30 2007-02-02 엘지전자 주식회사 왕복동식 압축기의 운전제어장치 및 방법
DE102007034296A1 (de) * 2007-07-24 2009-01-29 BSH Bosch und Siemens Hausgeräte GmbH Linearverdichter
CN102025240A (zh) * 2011-01-04 2011-04-20 中国电子科技集团公司第二十一研究所 斯特林制冷机用直线电机结构
BRPI1103355A2 (pt) * 2011-07-04 2013-07-23 Whirlpool Sa dispositivo adaptador para compressor linear, e compressor provido do referido dispositivo
BRPI1103647A2 (pt) * 2011-07-07 2013-07-02 Whirlpool Sa disposiÇço entre componentes de compressor linear
BRPI1103447A2 (pt) * 2011-07-19 2013-07-09 Whirlpool Sa feixe de molas para compressor e compressor provido de feixe de molas
BRPI1104172A2 (pt) * 2011-08-31 2015-10-13 Whirlpool Sa compressor linear baseado em mecanismo oscilatório ressonante
CN104251196B (zh) 2013-06-28 2016-10-05 Lg电子株式会社 线性压缩机
CN203906210U (zh) 2013-06-28 2014-10-29 Lg电子株式会社 线性压缩机
CN203835658U (zh) * 2013-06-28 2014-09-17 Lg电子株式会社 线性压缩机
CN104251193A (zh) 2013-06-28 2014-12-31 Lg电子株式会社 线性压缩机
CN204126840U (zh) 2013-06-28 2015-01-28 Lg电子株式会社 线性压缩机
CN203770066U (zh) 2013-06-28 2014-08-13 Lg电子株式会社 线性压缩机
JP6145880B2 (ja) * 2013-10-30 2017-06-14 理想科学工業株式会社 超音波放射素子
US9841012B2 (en) * 2014-02-10 2017-12-12 Haier Us Appliance Solutions, Inc. Linear compressor
US9322401B2 (en) * 2014-02-10 2016-04-26 General Electric Company Linear compressor
US9145878B1 (en) * 2014-07-11 2015-09-29 Marvin Ray McKenzie Oscillating linear compressor
KR20180017790A (ko) * 2016-08-11 2018-02-21 엘지전자 주식회사 리니어 압축기
KR102056322B1 (ko) * 2018-06-29 2019-12-16 엘지전자 주식회사 리니어 압축기
US11885325B2 (en) 2020-11-12 2024-01-30 Haier Us Appliance Solutions, Inc. Valve assembly for a reciprocating compressor

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US307862A (en) * 1884-11-11 Dredths to fred w
US1109154A (en) * 1913-04-11 1914-09-01 Thomas Motive Power Company Air-compressor.
US1294014A (en) * 1917-10-12 1919-02-11 Arthur Eggleton Worster Pump.
US1484527A (en) * 1921-05-07 1924-02-19 Pace Jefferson Davis Well-drilling bit
US1808745A (en) * 1930-01-09 1931-06-09 Bledsoe George Washington Pump
US3175758A (en) * 1962-04-30 1965-03-30 Lennox Ind Inc Compressor construction with inertial suction valve
US5266015A (en) * 1992-02-13 1993-11-30 Tecumseh Products Company Compressor suction and discharge valve assembly
JP3058412B2 (ja) * 1997-12-30 2000-07-04 エルジー電子株式会社 リニア圧縮機の吐出バルブ装置
DE10190607B4 (de) * 2000-02-17 2007-12-06 Lg Electronics Inc. Ansauggasventilvorrichtung eines Kolbenverdichters
KR100442379B1 (ko) * 2001-10-15 2004-07-30 엘지전자 주식회사 왕복동식 압축기의 가스 흡입장치
KR100400579B1 (ko) * 2001-10-30 2003-10-08 엘지전자 주식회사 흡입밸브 조립체
KR100446770B1 (ko) * 2002-01-03 2004-09-01 엘지전자 주식회사 왕복동식 압축기의 가스 흡입장치
KR20040022787A (ko) * 2002-09-07 2004-03-18 엘지전자 주식회사 왕복동식 압축기의 가스 흡입장치
KR100565485B1 (ko) * 2003-06-04 2006-03-30 엘지전자 주식회사 리니어 압축기
KR100550536B1 (ko) * 2003-06-04 2006-02-10 엘지전자 주식회사 리니어 압축기

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018123258B3 (de) * 2018-09-21 2020-03-26 Karlsruher Institut für Technologie Kolben, Kolbenverdichter und Pumpe

Also Published As

Publication number Publication date
US20070110600A1 (en) 2007-05-17
CN1966979A (zh) 2007-05-23
JP2007138920A (ja) 2007-06-07
DE602006017489D1 (de) 2010-11-25
EP1785626A1 (en) 2007-05-16
JP5073989B2 (ja) 2012-11-14

Similar Documents

Publication Publication Date Title
EP1785626B1 (en) Linear compressor
US7748967B2 (en) Linear compressor
US7748963B2 (en) Linear compressor
US7566206B2 (en) Linear compressor for multi-stage compression
US7922463B2 (en) Linear compressor
US6733245B2 (en) Piston support structure of reciprocating compressor
US20070009370A1 (en) Linear compressor
JP2006132522A (ja) リニア圧縮機
US20060257275A1 (en) Linear compressor and lubricating oil pump thereof
US10119530B2 (en) Reciprocating compressor
KR101990401B1 (ko) 리니어 압축기
US20070104597A1 (en) Linear compressor
KR20030059630A (ko) 왕복동식 압축기의 가스 흡입장치
KR101480239B1 (ko) 리니어 압축기
KR20060033586A (ko) 리니어 압축기의 흡입부
KR100383173B1 (ko) 압축기용 흡입밸브의 고정장치
KR101480184B1 (ko) 리니어 압축기
KR100455193B1 (ko) 왕복동식 압축기의 소음 저감 장치
KR100332817B1 (ko) 리니어 압축기의 피스톤 구조
KR100624718B1 (ko) 리니어 압축기의 흡입부
KR100404110B1 (ko) 리니어 압축기의 피스톤 충돌방지장치
US20050053479A1 (en) Compressor
KR100660690B1 (ko) 리니어 압축기용 냉매토출구조
KR20050038708A (ko) 리니어 압축기
WO2008082122A2 (en) Linear compressor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20060915

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20080104

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 602006017489

Country of ref document: DE

Date of ref document: 20101125

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20110714

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602006017489

Country of ref document: DE

Effective date: 20110714

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Owner name: INTELLECTUAL DISCOVERY CO., LTD., KR

Effective date: 20130619

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006017489

Country of ref document: DE

Representative=s name: BARDEHLE PAGENBERG PARTNERSCHAFT PATENTANWAELT, DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20130808 AND 20130814

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006017489

Country of ref document: DE

Representative=s name: BARDEHLE PAGENBERG PARTNERSCHAFT PATENTANWAELT, DE

Effective date: 20130820

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006017489

Country of ref document: DE

Representative=s name: BARDEHLE PAGENBERG PARTNERSCHAFT MBB PATENTANW, DE

Effective date: 20130820

Ref country code: DE

Ref legal event code: R081

Ref document number: 602006017489

Country of ref document: DE

Owner name: INTELLECTUAL DISCOVERY CO., LTD., KR

Free format text: FORMER OWNER: LG ELECTRONICS INC., SEOUL, KR

Effective date: 20130820

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20130725

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20130729

Year of fee payment: 8

Ref country code: FR

Payment date: 20130725

Year of fee payment: 8

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602006017489

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140818

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602006017489

Country of ref document: DE

Effective date: 20150303

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20150430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140818

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150303

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140901