WO2011007912A2 - Compresseur alternatif - Google Patents

Compresseur alternatif Download PDF

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Publication number
WO2011007912A2
WO2011007912A2 PCT/KR2009/003953 KR2009003953W WO2011007912A2 WO 2011007912 A2 WO2011007912 A2 WO 2011007912A2 KR 2009003953 W KR2009003953 W KR 2009003953W WO 2011007912 A2 WO2011007912 A2 WO 2011007912A2
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
piston
crankshaft
reciprocating
connecting rod
Prior art date
Application number
PCT/KR2009/003953
Other languages
English (en)
Korean (ko)
Other versions
WO2011007912A3 (fr
WO2011007912A9 (fr
Inventor
박경준
김영환
Original Assignee
(주)엘지전자
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 (주)엘지전자 filed Critical (주)엘지전자
Priority to PCT/KR2009/003953 priority Critical patent/WO2011007912A2/fr
Publication of WO2011007912A2 publication Critical patent/WO2011007912A2/fr
Publication of WO2011007912A3 publication Critical patent/WO2011007912A3/fr
Publication of WO2011007912A9 publication Critical patent/WO2011007912A9/fr

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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
    • 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
    • F04B39/0094—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 crankshaft
    • 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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0414—Cams
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/16—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by adjusting the capacity of dead spaces of working chambers
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/006—Crankshafts

Definitions

  • the present invention relates to a compressor, and more particularly to a reciprocating compressor that changes the operation mode of the compressor by leaking or blocking some refrigerant in the compression space.
  • Compressors are devices that convert mechanical energy into compressive energy of a compressive fluid.
  • the compressor may be classified into a reciprocating type, a rotary type, and a scroll type according to a compression method for the fluid.
  • the reciprocating compressor is provided with a drive motor for generating a rotational force inside the hermetic container and a compression unit for compressing a refrigerant that is a compressive fluid by receiving power from the drive motor.
  • the compression unit compresses the refrigerant while the piston connected to the crankshaft by the connecting rod reciprocates in the cylinder.
  • a variable displacement reciprocating compressor has been introduced to adjust the compression capacity according to the size of the refrigeration load.
  • a double displacement reciprocating compressor is known.
  • the double displacement reciprocating compressor (hereinafter, abbreviated as "double displacement compressor") is a method of performing a power operation and a saving operation while the stroke distance of the piston is changed according to the rotational direction of the crankshaft.
  • the operation mode of the compressor is limited to two, so that the operation mode of the compressor is not diversified accordingly, and accordingly, there was a limit in implementing various operation modes of the refrigerator employing the compressor.
  • an object of the present invention is to provide a reciprocating compressor that can control the operation mode of the compressor while reducing the dead volume by making the top dead center position of the piston the same during power operation and saving operation.
  • Another object of the present invention is to provide a reciprocating compressor which can vary the operation mode of a compressor and a refrigerator employing the compressor.
  • a sealed container having a sealed inner space;
  • a drive motor installed in the inner space of the sealed container and having a crank shaft;
  • a connecting rod coupled to the eccentric portion of the crankshaft to convert the rotational motion of the drive motor into a linear motion;
  • a piston coupled to the connecting rod to compress the refrigerant while reciprocating in the compression space of the cylinder;
  • a sleeve coupled between the crankshaft and the connecting rod, wherein at least one exhaust hole is formed in the cylinder such that a part of the refrigerant compressed in the compression space of the cylinder leaks into the inner space of the sealed container.
  • the cylinder is provided with a reciprocating compressor provided with a mode switching unit for selectively opening and closing the exhaust hole.
  • the drive motor is made of a motor that rotates in both directions, when rotating in one direction of the crankshaft while the sleeve and the connecting rod is constrained to each other while performing a turning motion, while the other direction of the crankshaft rotation At the time, the sleeve and the connecting rod are not restrained from each other, and are made to operate in power while independently rotating.
  • the connecting rod and the sleeve When the crank shaft is rotated in one direction, the connecting rod and the sleeve are constrained to each other, and the eccentric portion of the crank shaft and the sleeve serve as bearing surfaces, while the crank shaft is rotated in another direction.
  • the eccentric portion and the sleeve is constrained from each other, and the stroke between the connecting rod and the sleeve is a bearing surface for power operation to include; may include.
  • the stroke variable end is installed between the eccentric portion of the crankshaft and the sleeve to restrain or release the sleeve according to the rotational direction of the crankshaft, and is installed between the sleeve and the connecting rod so that the latching unit is the sleeve.
  • the restraint is released while the sleeve is released from the latching unit may be made of a sleeve restraining unit restrained.
  • the position of the top dead center of the piston in the power operation and the saving operation of the compressor by using a plurality of latching units can be controlled to be the same between the piston and the discharge valve during the saving operation.
  • FIG. 1 is a longitudinal sectional view showing a reciprocating compressor of the present invention
  • FIG. 2 is an exploded perspective view showing a mode switching unit in the compressor according to FIG. 1;
  • FIG. 3 is a schematic view showing the position of the exhaust hole in the compressor according to FIG.
  • FIG. 4 is an experimental graph of the exhaust hole of the compressor according to FIG.
  • 5 and 6 are longitudinal cross-sectional views showing a power mode and a saving mode, respectively, in the compressor according to FIG. 2;
  • FIG. 7 is a perspective view showing a double capacity reciprocating compressor to which the present invention mode switching unit is applied;
  • FIG. 8 to 10 are plan views showing a power mode, a first saving mode and a second saving mode, respectively, in the compressor according to FIG. 7.
  • the dual displacement compressor according to the present invention includes a drive motor 10 installed inside the sealed container 1 and rotating in both directions, and installed above the drive motor 10. It is composed of a compression unit 20 for compressing the refrigerant by receiving the rotational force of the drive motor 10.
  • the drive motor 10 is a fixed speed motor or an inverter motor rotating in one direction or in both directions, and a stator 11 supported by the frame 2 and elastically installed in the sealed container 1, and the stator 11.
  • Rotor 12 is rotatably installed in the inner side of, and the crank shaft 13 is coupled to the center of the rotor 12 to transmit the rotational force to the compression unit 20.
  • the compression unit 20 is a sleeve 21 is rotatably coupled to the eccentric portion of the crank shaft 13, the radial movement is coupled to the outer peripheral surface of the sleeve 21, the rotational movement of the crank shaft 13
  • Connecting rod 22 converting the linear motion into a linear motion
  • the piston 23 coupled to the other end of the connecting rod 22, and the piston 23 is linearly compressed to compress the refrigerant while reciprocating in the radial direction
  • the sleeve 21 has an outer circumferential surface and an inner circumferential surface formed in a cylindrical shape so that a shaft hole (unsigned) penetrates in the axial direction so as to be rotatably coupled to an eccentric portion of the crank shaft 13.
  • the sleeve 21 may be formed in the form of an eccentric cylinder whose axis center coincides with the center of rotation, i.e., the center of the sleeve 21 is eccentric with respect to the center of rotation. May be
  • One end of the piston 23 is blocked and formed into a hollow cylindrical shape, and the connecting rod 22 is rotatably coupled to the inside thereof.
  • the cylinder 24 has a compression space V1 linearly formed therein so that the piston 23 linearly reciprocates, and generally at the tip of the cylinder 24.
  • the valve assembly 25 which consists of a suction valve and a discharge valve is combined.
  • the cylinder 24 has an exhaust hole 24a formed in a radial direction thereof, that is, a direction substantially orthogonal to the direction in which the piston 23 reciprocates in the compression space V1.
  • a valve groove 24b is formed so as to intersect in a direction orthogonal to 24a so that the valve portion 32 of the mode switching unit 30 to be described later is slid.
  • one side of the cylinder 24 is provided with a mode switching unit 30 for determining the operation mode of the compressor while selectively opening and closing the exhaust hole (24a) while moving in the reciprocating direction of the piston (23).
  • the exhaust hole 24a is formed such that its inner end penetrates through the inner circumferential surface of the compression space V1 while its outer end communicates with the inner space of the hermetic container 1.
  • the exhaust hole 24a is a position where a proper amount of refrigerant is leaked during the compression stroke of the piston 23 while the refrigerant is not excessively sucked from the inner space of the sealed container 1 during the suction stroke, for example, FIGS. 3 and FIG.
  • the value A obtained by dividing the distance B from the centerline of the exhaust hole 24a to the top dead center of the piston 23 by the reciprocating distance S of the piston is in a range of 0.7 ⁇ A ⁇ 1.0. It may be desirable to be formed at a position to be.
  • exhaust hole 24a may be formed, a plurality of exhaust holes 24a may be formed along the circumferential direction in some cases.
  • the plurality of exhaust holes may be formed on the same circumference, but in some cases, the amount of refrigerant leakage in the compression space V1 and the internal space of the sealed container 1 It may be formed on different circumferences in consideration of the refrigerant suction amount.
  • the mode switching unit 30 is usually made of a solenoid valve that can selectively open and close the exhaust hole 24a while forming an electromagnet according to power supply.
  • it consists of a drive part 31 which forms an electromagnet, and the valve part 32 which opens and closes the said exhaust hole 24a while reciprocating in the valve groove 24b of the said cylinder 24 by the drive part 31.
  • the mode switching unit 30 opens the exhaust hole 24a when power is not supplied to the mode switching unit 30 in consideration of a characteristic in which the refrigerator to which the compressor is applied is operated, except for starting.
  • it is preferably configured to close the exhaust hole 24a when power is supplied.
  • reference numeral 26 denotes a discharge cover
  • V2 denotes a discharge space
  • the double capacity compressor of the present invention as described above is operated as follows.
  • the present embodiment varies the reciprocating distance of the piston. Even if the stroke variable stage is provided to vary the capacity of the compressor to leak a portion of the refrigerant to be compressed in the compression space to further vary the capacity of the compressor.
  • the dual displacement compressor uses a constant speed motor or an inverter motor in which the driving motor 10 is capable of forward rotation and reverse rotation.
  • the sleeve 121 is coupled to the eccentric portion of the crankshaft 13 is an eccentric sleeve is used that is formed axially and eccentrically the center of rotation.
  • a latching unit 140 is installed between the eccentric portion of the crankshaft 13 and the sleeve 121 so that the sleeve 121 is restrained or released from the crankshaft 13 according to the operation mode of the compressor.
  • a sleeve constraining unit 150 is installed between the sleeve 121 and the connecting rod 122 to restrain or release the sleeve 121 and the connecting rod 122 according to the operation mode of the compressor.
  • the latching unit 140 is a latching pin 141 is installed on the eccentric portion of the crankshaft 13, the latching pin 141 is coupled to the sleeve 121 in accordance with the rotation direction of the crankshaft 13
  • the pin stopper 142 is fastened or restrained by) and the pin spring 143 which elastically supports the latching pin 141 in a direction that is always drawn out.
  • the pin stopper 142 of the pin stopper 142 so that the latching pin 141 is caught in the locking end during the power operation while sliding through the inner peripheral surface of the opposite end of the locking end during the saving operation.
  • the entire inner circumferential surface may be formed in a combination of two or more circles.
  • the pin stopper 142 may be formed in one circle on the inner circumferential surface thereof.
  • it is preferable that the pin stopper 142 is disposed so that its inner circumferential surface is eccentric with respect to the center of the eccentric portion of the crankshaft 13 because it can selectively restrain the latching pin 141 according to the operation mode. .
  • the pin stopper 142 can be fastened only to the latching end to which the latching pin 141 is caught, so that the number of bolts can sufficiently withstand the load when the latching pin 141 is caught to the locking end. Consideration should be given to size.
  • the sleeve constraining unit 150 includes first magnets 151 coupled to the sleeve, and second magnets coupled to the connecting rod 122 with a gap between the outer circumferential surfaces of the first magnets 151. 152).
  • the first magnets 151 and the second magnets 152 are formed such that the positive and negative poles appear at least one or more times within one period of the electric angle.
  • the fields 151 and the second magnets 152 may be made of permanent magnets, but may be made of electromagnets in some cases.
  • first magnets 151 and the second magnets 152 are permanent magnets
  • the first magnets 151 and the second magnets 152 are arranged radially in plural along the circumferential direction.
  • the first magnets 151 and the second magnets 152 are preferably arranged such that inner and outer circumferential surfaces of the first magnets 151 and the second magnets 152 have different polarities to form closed loops.
  • the first magnets 151 and the second magnets 152 have the same arc angle, and the first magnets 151 and the second magnets 152 each have a circumferential direction.
  • the cylinder 124 has a compression space linearly formed therein so that the piston 123 reciprocates linearly, and the cylinder 124 has a normal suction valve and a discharge valve.
  • the valve assembly (not shown) is coupled.
  • the cylinder 124 has an exhaust hole 124a formed in a radial direction thereof, that is, a direction substantially orthogonal to the direction in which the piston 123 reciprocates in the compression space, and the exhaust hole 124a. Crossed in a direction orthogonal to the valve groove 124b is formed so that the valve portion 132 of the mode switching unit 130 to be described later to the sliding movement.
  • a mode switching unit 130 is installed at one side of the cylinder 124 to determine the operation mode of the compressor while selectively opening and closing the exhaust hole 124a while moving in the reciprocating direction of the piston 123.
  • the exhaust hole 124a and the like formed in the cylinder 124 may be formed in the same manner as in the above-described embodiment.
  • the mode switching unit 130 can also be configured and combined in the same manner as the above-described embodiment. A detailed description thereof will be omitted since it may refer to the above-described embodiment.
  • the reciprocating compressor of the present invention as described above is operated as follows.
  • the crank shaft 13 rotates counterclockwise, and the latching pin 141 provided in the eccentric portion of the crank shaft 13.
  • the pin spring 143 is supported and protrudes in a radial direction, and the latching pin 141 is caught by the locking end of the pin stopper 142.
  • the latching pin 141 is caught by the locking end of the pin stopper 142 and the crankshaft 13 and the sleeve 121 are integrally tied and rotated to force the sleeve 121 and the connecting rod.
  • the reference numeral 122 performs a sliding movement between the first magnet 151 and the second magnet 152 to overcome the magnetic force.
  • crankshaft 13 and the sleeve 121 are rotated together with the maximum amount of eccentricity, and the piston 123 reciprocates by twice the total amount of eccentricity of the total amount of the eccentricity of the eccentric portion and the eccentricity of the sleeve. Maximum freezing capacity will occur.
  • the piston 123 reciprocates by twice the amount of eccentricity of the eccentric portion, and the compressor generates a minimum freezing capacity.
  • the connecting rod 122 is fixed in a position where the reciprocating distance of the piston 123 is shorter than the reciprocating distance at the time of power operation, but the sleeve 121 is eccentric with respect to the piston 123.
  • the top dead center of the piston 123 is moved to a point almost the same as the top dead center at the time of power operation.
  • the valve unit 132 of the mode switching unit 130 when power is applied to the mode switching unit 130 while the compressor is in power operation, the valve unit 132 of the mode switching unit 130 exhausts the cylinder 124.
  • the coolant sucked into the compression space V1 by blocking the hole 124a is compressed by the reciprocating motion of the piston 123 and discharged into the discharge space V2 of the discharge cover 26.
  • the valve unit 132 of the mode switching unit 130 opens the exhaust hole 123a to allow the refrigerant to be sucked into the compression space V1.
  • the capacity of the compressor may be adjusted by adjusting the position, number, and size of the exhaust holes 124a to reduce the amount of refrigerant discharged. That is, in this mode, the capacity of the compressor can be made smaller than the capacity between the power operation mode and the first saving operation mode or the first saving operation mode. This is called a second saving operation.
  • the reciprocating compressor of the present invention can be used in a domestic refrigerator as well as an industrial refrigeration apparatus that can vary the cold power.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Abstract

La présente invention concerne un compresseur alternatif comprenant une unité de verrouillage qui utilise une force magnétique par l'intermédiaire de laquelle un piston est entraîné par va-et-vient à une valeur correspondant à deux fois la valeur totale excentrique obtenue par ajout d'une valeur excentrique d'une partie excentrique à une valeur excentrique d'un manchon excentrique dans un mode actif, pendant que le piston est entraîné par va-et-vient à une valeur égale à deux fois la valeur excentrique de la portion excentrique dans un mode économie d'énergie. Le piston peut avoir un point mort supérieur identique en mode actif et en mode économie d'énergie du compresseur, ce qui permet d'obtenir une réduction du volume mort entre le piston et une soupape de décharge et d'augmenter un taux variable d'une capacité de refroidissement du compresseur en mode économie d'énergie.
PCT/KR2009/003953 2009-07-17 2009-07-17 Compresseur alternatif WO2011007912A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2009/003953 WO2011007912A2 (fr) 2009-07-17 2009-07-17 Compresseur alternatif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2009/003953 WO2011007912A2 (fr) 2009-07-17 2009-07-17 Compresseur alternatif

Publications (3)

Publication Number Publication Date
WO2011007912A2 true WO2011007912A2 (fr) 2011-01-20
WO2011007912A3 WO2011007912A3 (fr) 2011-03-31
WO2011007912A9 WO2011007912A9 (fr) 2011-06-03

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ID=43449923

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2009/003953 WO2011007912A2 (fr) 2009-07-17 2009-07-17 Compresseur alternatif

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WO (1) WO2011007912A2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003064857A2 (fr) * 2002-01-29 2003-08-07 Bristol Compressors, Inc. Compresseurs conçus pour produire une modulation de capacite automatique et systeme d'echange thermique les renfermant
WO2008096999A1 (fr) * 2007-02-06 2008-08-14 Lg Electronics Inc. Compresseur décrivant un mouvement de va-et-vient

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003064857A2 (fr) * 2002-01-29 2003-08-07 Bristol Compressors, Inc. Compresseurs conçus pour produire une modulation de capacite automatique et systeme d'echange thermique les renfermant
WO2008096999A1 (fr) * 2007-02-06 2008-08-14 Lg Electronics Inc. Compresseur décrivant un mouvement de va-et-vient

Also Published As

Publication number Publication date
WO2011007912A3 (fr) 2011-03-31
WO2011007912A9 (fr) 2011-06-03

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