EP2148988A1 - Verdichter und ölversorgungskonstruktion dafür - Google Patents

Verdichter und ölversorgungskonstruktion dafür

Info

Publication number
EP2148988A1
EP2148988A1 EP08753174A EP08753174A EP2148988A1 EP 2148988 A1 EP2148988 A1 EP 2148988A1 EP 08753174 A EP08753174 A EP 08753174A EP 08753174 A EP08753174 A EP 08753174A EP 2148988 A1 EP2148988 A1 EP 2148988A1
Authority
EP
European Patent Office
Prior art keywords
oil
orbiting scroll
main frame
hole
groove
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.)
Withdrawn
Application number
EP08753174A
Other languages
English (en)
French (fr)
Other versions
EP2148988A4 (de
Inventor
Byung-Kil Yoo
Myung-Kyun Kiem
Chul-Su Jung
Byeong-Chul Lee
Se-Heon 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 EP2148988A1 publication Critical patent/EP2148988A1/de
Publication of EP2148988A4 publication Critical patent/EP2148988A4/de
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • 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
    • F04B39/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0253—Details concerning the base
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation

Definitions

  • FIG. 1 is a sectional view of a compressor having an oil supplying structure according to an embodiment
  • FIG. 2 is a sectional view showing a modification of an oil hole of an oil supplying structure according to an embodiment
  • FIGS. 3 to 6 are sectional and planar views showing modifications of an oil hole of an oil supplying structure according to embodiments
  • FIG. 7 is a planar view showing an oil groove of an oil supplying structure according to an embodiment
  • FIG. 8 is a sectional view showing a compressor having an oil supplying structure according to an embodiment being operated
  • FIG. 9 is a sectional view of a compressor having an oil supplying structure according to another embodiment
  • FIG. 10 is a sectional view of a compressor having an oil supplying structure according to another embodiment
  • FIGS. 20-22 are exemplary installations of a compressor having an oil supplying device according to embodiments disclosed herein. Mode for the Invention
  • a compressor is a device for compressing gas by converting electric energy into kinetic energy.
  • the compressor may include a driving force generating device that generates a driving force, and a compression device that compresses gas by receiving a driving force generated from the driving force generating device.
  • Compressors are divided into several types, including a rotary compressor, a reciprocating compressor, and a scroll compressor, according to a compression mechanism for compressing gas.
  • a rotational force generated by a motor is transmitted to an orbiting scroll through a rotational shaft.
  • the orbiting scroll performs an orbiting motion by being engaged with a fixed scroll, and a plurality of compression chambers or pockets are formed by a wrap of the fixed scroll and a wrap of the orbiting scroll.
  • a volume thereof is changed to suck, compress, and discharge gas.
  • Oil contained in a casing is pumped along an oil passage disposed in the rotational shaft, and is supplied between a rear surface of the orbiting scroll and a bearing surface of a main frame that supports the rear surface of the orbiting scroll. Then, the oil returns to the lower surface of the casing.
  • FIG. 1 is a sectional view of a compressor having an oil feeding or supplying structure according to an embodiment.
  • the compressor 1 may include a casing 10, a main frame 20 and a sub frame 30 disposed in the casing 10 with a predetermined gap therebetween, and a driving motor M disposed between the main frame20 and the sub frame 30.
  • a suction pipe 11 and a discharge pipe 12 may be respectively, coupled to the casing 10, and oil may be contained in the casing 10.
  • the main frame 20 may include a shaft insertion hole 22 formed in a frame body 21 and having a predetermined shape, that receives a rotational shaft 70, a boss insertion groove 23 which may extend from the shaft insertion hole 22 on an upper surface of the frame body 21 and having an inner diameter larger than that of the shaft insertion hole 22, a bearing surface 24 formed on an upper surface of the frame body 21, and an oil groove 25, which may have a ring shape and be formed at the bearing surface 24 with a predetermined width and depth.
  • a fixed scroll 40 may be coupled to an inside of the casing 10 with a predetermined gap from the main frame 20.
  • an orbiting scroll 50 may be coupled between the fixed scroll 40 and the main frame 20 so as to perform an orbiting motion.
  • An Oldham s ring 60 that prevents the orbiting scroll 50 from rotating on its axis may be coupled between the main frame 20 and the orbiting scroll 50.
  • the fixed scroll 40 may include a body portion 41 having a predetermined shape, a wrap 42 formed on one surface of the body portion 41 in an involute curve having a predetermined height and thickness, a discharge hole 43 formed at a center of the body portion 41, and an inlet 44 formed at one side of the body portion 41.
  • the orbiting scroll 50 may include a disc portion 51 having a predetermined thickness and area, a wrap 52 formed on one surface of the disc portion 51 in an involute curve having a predetermined thickness and height, and a boss portion 53 formed on another surface of the disc portion 51 with a predetermined height.
  • a lower surface of the disc portion 51 may form a bearing surface 54, and a shaft insertion hole 55 having a predetermined outer diameter and depth may be formed in the boss portion 53.
  • One or more oil hole 56 may be formed in the disc portion 51 of the orbiting scroll
  • the oil hole(s) 56 may be positioned at an inlet of a compression portion, which may include compression pockets or chambers formed by a wrap 42 of the fixed scroll 40 and a wrap 52 of the orbiting scroll 50.
  • the oil hole 56 may be disposed to be adjacent to an end of the wrap 52 protruding from the disc portion 51 of the orbiting scroll 50 on a same extending line.
  • the oil hole 56 may be formed to contact the end of the wrap 52.
  • the oil hole 56 may be disposed to be adjacent to the end of the wrap 52 so as to facilitate processing.
  • An inner diameter of the oil hole 56 may be less than a thickness of the wrap 52 of the orbiting scroll 50.
  • the oil hole 56 may be formed to be perpendicular to the disc portion 51, and may have a constant inner diameter. Or, as shown in FIG. 2, the oil hole 56 may be formed to be inclined from the disc portion 51.
  • the oil hole 45 may have an inner diameter of, for example, 2.0-3.5 mm.
  • the long recess portion 56B may be formed so as to be adjacent to an end of the wrap 52 of the orbiting scroll 50 formed on the upper surface of the disc portion 51 on a same extending line. Also, as shown in FIG. 6, the long recess portion 56B may be formed so as to be inclined from the end of the wrap 52.
  • An oil groove 26 that communications with the oil hole 56 may be formed in the bearing surface 24 of the main frame 20 that supports a lower surface of the disc portion 51 of the orbiting scroll 50. As shown in FIG. 7, the oil groove 26 may be disposed at one side of an orbiting path of the oil hole 56 which is moved by the orbiting motion of the orbiting scroll 50.
  • the oil groove 26 may have a square shape. However, the oil groove 26 may be formed to have various shapes besides a square shape, such as ring-shaped. Further, the oil groove 26 may have a depth of 3.5-4.5 mm.
  • the wrap 52 of the orbiting scroll 50 may be engaged with the wrap 42 of the fixed scroll 40, and the boss portion 53 may be inserted into the boss insertion groove 23 of the main frame 20.
  • the bearing surface of the disc portion 51 may be supported by the bearing surface 24 of the main frame 20.
  • the ring-shaped oil groove 25 formed in the main frame 20 may serve as the oil groove 26. In such a case, the oil groove 26 need not be additionally formed in the main frame 20.
  • a rotational shaft 70 that transmits a rotational force generated by the driving motor M to the orbiting scroll 50 may be coupled to the driving motor M.
  • the rotational shaft 70 may include a shaft portion 71 having a predetermined length, an eccentric portion 72 extending from the shaft portion 71, and an oil passage 73 penetratingly formed in the shaft portion 71 and the eccentric portion 72.
  • the shaft portion 71 of the rotational shaft 70 may be forcibly inserted into a rotor of the driving motor M, and may be penetratingly inserted into the main frame 20. Also, the eccentric portion 72 may be inserted into the shaft insert hole 55 of the boss portion 53 of the orbiting scroll 50. An end of the rotational shaft 70 may be submerged into oil contained in the casing 10.
  • Unexplained reference numeral B denotes a bush
  • 100 denotes an oil feeder mounted on the rotational shaft 70
  • 110 denotes a balance weight.
  • the driving motor M When power is supplied to the compressor, the driving motor M is operated to generate a rotational force. As the rotational shaft 70 rotates by receiving the rotational force generated by the driving motor M, the orbiting scroll 50 coupled to the eccentric portion 72 orbits centering around the rotational shaft 70 due to the Oldham s ring 60. As the orbiting scroll 50 performs the orbiting motion, the wrap 52 of the orbiting scroll 50 engaged with the wrap 42 of the fixed scroll 40 form a plurality of compression pockets or chambers P which move towards a center of the orbiting scroll 50. As a volume of the compression pockets or chambers P is changed, gas is sucked, compressed, and then is discharged through the discharge hole 43 of the fixed scroll 40. Gas sucked into the casing 10 through the suction pipe 11 is sucked into the compression pockets or chambers P through a suction passage formed by the inlet 44 of the fixed scroll 40 and the orbiting scroll 50.
  • Some of the oil supplied between the bearing surface 54 of the disc portion 51 of the orbiting scroll and the bearing surface 24 of the main frame 20 is introduced into the compression portion formed by the wrap 52 of the orbiting scroll 50 and the wrap 42 of the fixed scroll 40, that is, the compression pockets or chambers P, through the oil hole 56 penetratingly formed at the disc portion 51 of the orbiting scroll 50.
  • a pressure leakage between a high pressure compression pocket or chamber P and a low pressure compression pocket or chamber P may be prevented by an oil sealing.
  • friction generated at a contact surface between the orbiting scroll 50 and the fixed scroll 40 may be prevented.
  • an oil supplying performance to the compression pockets P through the oil hole 56 may be enhanced since gas sucked into the compression pockets P formed by the wrap 52 of the orbiting scroll 50 and the wrap 42 of the fixed scroll 40 flows.
  • oil filled in the oil groove 26 may be introduced into the oil hole 56, and then introduced into the compression pockets P.
  • the oil groove 26 enhances an oil supplying performance to the compression pockets P.
  • the oil supplying performance to the compression pockets P may be more enhanced when the compressor is operated at a low speed.
  • FIG. 9 is a sectional view of a compressor having an oil supplying structure according to another embodiment.
  • the compressor of FIG. 9 may include a casing 10, a main frame 20, a fixed scroll 40, an orbiting scroll 50, a rotational shaft 70, and a driving motor M, in which an oil passage 27 through which oil is supplied to a bearing surface 24 of the main frame 20 or a bearing surface 54 of the orbiting scroll 50 may be provided at one side of the main frame 20.
  • the compressor of this embodiment has the same structure as the aforementioned compressor except for the main frame 20.
  • the main frame 20 may include a shaft insertion hole 22 formed at a frame body 21 having a predetermined shape, that receives the rotational shaft 70, a boss insertion groove 23 extending from the shaft insertion hole 22 on an upper surface of the frame body 21 and having an inner diameter larger than that of the shaft insertion hole 22 and a predetermined depth, a bearing surface 24 formed on an upper surface of the frame body 21, and an oil groove 25, which may have a ring shape, formed in the bearing surface 24 with a predetermined width and depth.
  • the oil passage 27 may be penetratingly formed in the boss insertion groove 23 and the bearing surface 24 of the main frame 20 so that oil stored in the boss insertion groove 23 may be introduced between a disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 that supports the disc portion 51.
  • the oil passage 27 may be inclined from the bearing surface 24 of the main frame 20, and may be a linear hole.
  • An amount of oil supplied between the bearing surface 54 of the disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 may be increased since some of the oil filled in the boss insertion groove 23 may be supplied therebetween through the oil passage 27. Some of the oil supplied between the bearing surface 54 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 may be sucked into the compression pockets P together with gas.
  • FIG. 10 is a sectional view of a compressor having an oil supplying structure according to another embodiment.
  • the compressor of FIG. 10 may include a casing 10, a main frame 20, a fixed scroll 40, an orbiting scroll 50, a rotational shaft 70, and a driving motor M.
  • An oil hole 56 through which oil may be introduced to the compression portion while the orbiting scroll 50 performs an orbiting motion may be penetratingly formed at a disc portion 51 of the orbiting scroll 50, and an oil passage 27 through which oil may be supplied to the oil hole 56 may be penetratingly formed at one side of the main frame 20.
  • the compressor of this embodiment has the same structure as the aforementioned compressors except for the main frame 20 and the orbiting scroll 50.
  • the orbiting scroll 50 may include a disc portion 51 having a predetermined thickness and area, a wrap 52 formed on one surface of the disc portion 51 in an involute curve having a predetermined thickness and height, and a boss portion 53 formed on another surface of the disc portion 51 with a predetermined height.
  • a shaft insertion hole 55 having a predetermined outer diameter and depth may be formed in the boss portion 53.
  • the oil hole 56 may be formed at the disc portion 51 of the orbiting scroll 50.
  • the oil hole 56 may be positioned at an inlet of a compression portion formed by the wrap 42 of the fixed scroll 40 and the wrap 52 of the orbiting scroll 50. That is, the oil hole 56 may be disposed to be adjacent to an end of the wrap 52 protruding from the disc portion 51 of the orbiting scroll 50 on a same extending line.
  • the oil hole 56 may be formed to contact the end of the wrap 52. However, the oil hole 56 may be disposed to be adjacent to the end of the wrap 52 so as to facilitate processing.
  • a structure of the oil hole 56 of the orbiting scroll 50 of this embodiment is the same as the structure of the embodiment of FIG. 1.
  • the main frame 20 may include a shaft insertion hole 22 formed at a frame body 21 and having a predetermined shape, that receives the rotational shaft 70, a boss insertion groove 23 extending from the shaft insertion hole 22 on an upper surface of the frame body 21, which may have an inner diameter larger than that of the shaft insertion hole 22, and having a predetermined depth, a bearing surface 24 formed on an upper surface of the frame body 21, and an oil groove 25, which may have a ring shape and be formed at the bearing surface 24 with a predetermined width and depth.
  • the ring- shaped oil groove may not be provided according to a structure of the compressor.
  • the oil passage 27 of the main frame 20 may be penetratingly formed at the boss insertion groove 23 and the bearing surface 24 of the main frame 20 so that oil stored in the boss insertion groove 23 may be introduced between a disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 that supports the disc portion 51.
  • the oil groove 25, which may have a predetermined area and may communicate with the oil hole 56 may be formed at the bearing surface 24 of the main frame 20.
  • the oil groove 26 may be disposed at one side of an orbiting path of the oil hole which is moved by an orbiting motion of the orbiting scroll 50.
  • the oil passage 27 may communicate with the oil groove 26.
  • the oil groove 26 may have the same shape as the oil groove of the embodiment of FIG. 1.
  • the oil passage 27 of the main frame 20 may be a linear hole penetratingly formed in the boss insertion groove 23 and the bearing surface that supports the disc portion 51 of the orbiting scroll 50.
  • a longitudinal direction of the oil passage 27 may be inclined from a center of the boss insertion groove 23 of the main frame 20.
  • the oil passage 27 may be formed with an inclination angle so that oil stored in the boss insertion groove 23 may be effectively discharged when the boss portion 53 of the orbiting scroll 50 performs a circular motion.
  • the oil passage 27 of the main frame 20 may include a first through hole 27A that linearly penetrates an inner circumferential wall of the boss insertion groove 23 of the main frame 20 and an outer surface of the main frame 20 and a second through hole 27B that linearly penetrates the first through hole 27A and the bearing surface 24 of the main frame 20.
  • a cover 27C that covers the first through hole 27A may be disposed on an outer surface of the main frame of the first through hole 27A, thereby facilitating a processing of the oil passage 27.
  • an oil discharge passage 28 through which oil inside the boss insertion groove 23 may be discharged may be disposed at one side of the main frame 20.
  • An inlet of the oil discharge passage 28 disposed on an inner circumferential wall of the boss insertion groove 23 may be positioned above an inlet of the oil passage 27 disposed on an inner circumferential wall of the boss insertion groove 23.
  • the oil discharge passage 28 may include a first passage 28A that penetrates an inner circumferential wall of the boss insertion groove 23 and an outer circumferential surface of the main frame 20, and a second passage 28B disposed on the outer circumferential surface of the main frame 20 in a vertical direction so as to communicate with the first passage 28A.
  • the oil discharge passage 28 may serve to discharge oil excessively contained at the boss insertion groove 23 to a lower surface of the casing 10.
  • An oil controlling portion that controls an amount of oil introduced into the compression portion through the oil passage 27 may be disposed in the oil passage 27.
  • the oil controlling portion may include a small pipe portion 27D, and an expanded pipe portion 27E having an inner diameter larger than that of the small pipe portion 27D.
  • a supplementary path 27F through which oil flows may be formed at an inner edge of a stepped surface formed by a difference of inner diameters of the small pipe portion 27D and the expanded pipe 27E.
  • a stopper 120 having a through hole 121 therein may be coupled to the expanded pipe portion 27E of the oil passage 27.
  • An opening/closing ball 130 that opens and closes the through hole 121 of the stopper 120 may be inserted into the expanded pipe portion 27E.
  • the opening/closing ball 130 may be moved according to a flow rate of oil inside the expanded pipe portion 27E.
  • a spring 140 that elastically supports the opening/ closing ball 130 may be inserted into the expanded pipe portion 27E.
  • the stopper 120 may be formed to have a predetermined length and a circular sectional shape corresponding to a sectional surface of the expanded pipe portion 27E.
  • the through hole 121 may be formed in the stopper 120, and a supporting surface that supports the spring 140 may be provided on an inner circumferential wall of the through hole 121.
  • the opening/closing ball 130 may be spherical in shape.
  • a maximum diameter of the opening/closing ball 130 may be smaller than an inner diameter of the expanded pipe portion 27E, but may be larger than an inner diameter of the through hole 121 of the stopper 120.
  • the spring 140 may be a coil spring. In such a case, one side of the coil spring may be supported by the supporting surface of the stopper 120, and another side supported by the opening/closing ball 130.
  • the oil con- trolling portion may be operated so that the oil contained in the boss insertion groove 23 of the main frame 20 may be supplied to the oil hole 56 of the orbiting scroll 50 via the small pipe portion 27D, the supplementary path 27F, the through hole 121 of the stopper, and the expanded pipe portion 27E. Since the boss portion 53 of the orbiting scroll 50 that performs a circular motion in the boss insertion groove 23 of the main frame 20 may have a slow rotational speed, a small amount of oil may be pumped to the oil passage 27. Accordingly, the opening/closing ball 130 may be supported by the stepped surface by an elastic force of the spring 140, thereby opening the through hole 121 of the stopper 120.
  • the oil controlling portion may serve to smoothly supply oil to the compression portion when the compressor is rotated at a low speed, and to prevent oil from being excessively supplied to the compression portion when the compressor is rotated at a high speed. More specifically, when the compressor is rotated at a low speed, the oil controlling portion may be operated so that oil contained in the boss insertion groove 23 of the main frame 20 may be supplied to the oil hole 56 of the orbiting scroll through the oil passage 27. On the other hand, when the compressor is rotated at a high speed, the oil controlling portion may be operated so that the oil contained in the boss insertion groove 23 of the main frame 20 may not be supplied to the oil hole 56 of the orbiting scroll through the oil passage 27.
  • FIG. 17 is a sectional view of an oil controlling portion according to another embodiment.
  • the oil controlling portion of this embodiment may include a stopper 150 having a through hole 151 therein, and fixedly coupled to an expanded pipe portion 27K of a vertical passage 27G of the oil passage 27, an opening/closing 160 disposed at the expanded pipe portion 27K and moving according to a flow rate of oil, that opens and closes the through hole 121 of the stopper, and a spring 170 coupled to the stopper 150 for elastically supporting the opening/closing ball 160.
  • the oil passage 27 may include a slant passage 27H that penetrates an inner circumferential wall of the boss insertion groove 23 of the main frame 20 and the bearing surface 24 of the main frame 20, and a vertical passage 27G that penetrates the bearing surface 24 of the main frame 20 and a lower surface of a body portion 21 of the main frame 20.
  • the vertical passage 27G and the slant passage 27H may be connected to the bearing surface 24 of the main frame 20.
  • a common hole 27M having a predetermined area and depth may be formed at the connection part. The common hole 27M may serve as the oil groove.
  • the expanded pipe portion 27K may be formed at the vertical passage 27G.
  • a stepped surface may be formed at a starting part of the expanded pipe portion 27K.
  • the stopper 150 may be coupled to the expanded pipe portion 27K with a predetermined gap from the stepped surface.
  • the opening/closing ball 160 which may be spherical in shape, may be disposed between the stopper 150 and the stepped surface.
  • the spring 170 may be a coil spring.
  • one side of the coil spring may be supported by the stepped surface, and another side thereof supported by the opening/closing ball 160.
  • the opening/closing ball 160 closes the through hole 151 of the stopper 150 by receiving an elastic force of the coil spring.
  • the oil controlling portion when the compressor is operated at a low speed, the oil controlling portion may be operated so that oil contained in the boss insertion groove 23 of the main frame 20 may be supplied to the oil hole 56 of the orbiting scroll through the slant passage 27H. Since a small amount of oil may be pumped to the slant passage 27H from the boss insertion groove 23, a pressure of oil inside the common hole 27M is low. Accordingly, the opening/closing ball 160 may block the vertical passage 27G by an elastic force of the spring 170.
  • the oil controlling portion may be applied to the oil supplying structure of FIG. 9.
  • oil inside the casing 10 may be pumped through the oil passage 73 formed in the rotational shaft 70 as the rotational shaft 70 rotates.
  • the oil may be filled in the boss insertion groove 23, and then supplied between the bearing surface 54 of the disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 through the oil passage 27 of the main frame 20 as the boss portion 53 of the orbiting scroll 50 performs a circular motion in the boss insertion groove 23.
  • the oil contained in the boss insertion groove 23 may be introduced between the bearing surface 54 of the disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 as the boss portion 53 of the orbiting scroll 50 rotates.
  • the oil supplied between the bearing surface 54 of the disc portion 51 of the orbiting scroll 50 and the bearing surface 24 of the main frame 20 may be introduced into the compression portion formed by the wrap 52 of the orbiting scroll 50 and the wrap 42 of the fixed scroll, that is, the compression pockets P through the oil hole 56 of the orbiting scroll 50 as the orbiting scroll 50 performs an orbiting motion.
  • the oil hole 56 of the orbiting scroll 50 may communicate with the oil groove 26 formed at the bearing surface 24 of the main frame 20. Accordingly, oil filled in the oil groove 26 may be introduced into the oil hole 56, and then is introduced into the compression pockets P.
  • the oil groove 26 may enhance an oil supplying performance to the compression pockets P.
  • the oil supplying performance to the compression pockets P may be more enhanced when the compressor is operated at a low speed.
  • oil may be prevented from being excessively supplied to the compression pockets P formed by the wrap 52 of the orbiting scroll 50 and the wrap 42 of the fixed scroll while the compressor is operated at a high speed.
  • the oil feeding structure for a compressor may further include an oil storing portion disposed outside the compression pockets P, and an oil passage penetratingly formed at the disc portion 51 of the orbiting scroll 50, to supply oil stored in the oil storing portion into the compression pockets P as the orbiting scroll 50 performs an orbiting motion.
  • the compressor and oil supplying structure therefor according to embodiments disclosed herein has numerous applications. Such applications may include, for example, air conditioning and refrigeration applications.
  • Such exemplary application is shown in FIG. 20, in which compressor 710 having an oil supplying structure according to embodiments disclosed herein is installed in a refrigerator/ freezer 700. Installation and functionality of a compressor in a refrigerator is discussed in detail in U.S. Patent Nos. 7,082,776, 6,955,064, 7,114,345, 7,055,338 and 6,772,601, the entirety of which are incorporated herein by reference.
  • FIG. 21 Another such exemplary application is shown in FIG. 21, in which a compressor 810 having an oil supplying structure according to embodiments disclosed herein is installed in an outdoor unit of an air conditioner 800. Installation and functionality of a compressor in a refrigerator is discussed in detail in U.S. Patent Nos. 7,121,106, 6,868,681, 5,775,120, 6,374,492, 6,962,058, 6,951,628 and 5,947,373, the entirety of which are incorporated herein by reference.
  • FIG. 22 Another such exemplary application is shown in FIG. 22, in which a compressor 910 having an oil supplying structure according to embodiments disclosed herein is installed in a single, integrated air conditioning until 900. Installation and functionality of a compressor in a refrigerator is discussed in detail in U.S. Patent Nos. 7,032,404, 6,412,298, 7,036,331, 6,588,228, 6,182,460, and 5,775,123, the entirety of which are incorporated herein by reference.
  • Embodiments disclosed herein provide an oil feeding or supplying structure for a compressor capable of smoothly supplying oil into a compression portion (compression pockets) formed by a wrap of a fixed scroll and a wrap of an orbiting scroll.
  • an oil feeding or supplying structure for a compressor that includes a fixed scroll, an orbiting scroll engaged with the fixed scroll to form a compression portion and a frame having a bearing surface to support the orbiting scroll, and a boss insertion groove to insert a boss portion of the orbiting scroll.
  • An oil hole through which oil may be introduced to the compression portion may be penetratingly formed at a disc portion of the orbiting scroll.
  • an oil feeding or supplying structure for a compressor that includes a fixed scroll, an orbiting scroll engaged with the fixed scroll to form a compression portion and a frame having a bearing surface to support the orbiting scroll and a boss insertion groove to insert a boss portion of the orbiting scroll.
  • An oil passage through which oil stored in the boss insertion groove may be introduced between a disc portion of the orbiting scroll and the bearing surface of the frame may be penetratingly formed at the boss insertion groove and the bearing surface of the frame.
  • an oil feeding structure for a compressor that includes a fixed scroll, an orbiting scroll engaged with the fixed scroll to form a compression portion, and a frame having a bearing surface to support the orbiting scroll and a boss insertion groove to insert a boss portion of the orbiting scroll.
  • An oil hole through which oil may be introduced to the compression portion may be penetratingly formed at a disc portion of the orbiting scroll, and an oil passage through which oil may be supplied to the oil hole may be penetratingly formed at one side of the frame.
  • any reference in this specification to one embodiment, or example embodiment, etc. means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention.
  • the appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
EP08753174A 2007-04-25 2008-04-25 Verdichter und ölversorgungskonstruktion dafür Withdrawn EP2148988A4 (de)

Applications Claiming Priority (2)

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KR1020070040529A KR100882481B1 (ko) 2007-04-25 2007-04-25 스크롤 압축기의 오일 공급구조
PCT/KR2008/002353 WO2008133445A1 (en) 2007-04-25 2008-04-25 Compressor and oil supplying structure therefor

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EP2148988A1 true EP2148988A1 (de) 2010-02-03
EP2148988A4 EP2148988A4 (de) 2011-11-16

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JP5006444B2 (ja) 2012-08-22
JP2010525240A (ja) 2010-07-22
CN101663485A (zh) 2010-03-03
US20080267803A1 (en) 2008-10-30
WO2008133445A1 (en) 2008-11-06
EP2148988A4 (de) 2011-11-16
KR20080095695A (ko) 2008-10-29
KR100882481B1 (ko) 2009-02-06

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