EP4443005A1 - Compresseur rotatif et appareil ménager le comprenant - Google Patents

Compresseur rotatif et appareil ménager le comprenant Download PDF

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Publication number
EP4443005A1
EP4443005A1 EP23824080.8A EP23824080A EP4443005A1 EP 4443005 A1 EP4443005 A1 EP 4443005A1 EP 23824080 A EP23824080 A EP 23824080A EP 4443005 A1 EP4443005 A1 EP 4443005A1
Authority
EP
European Patent Office
Prior art keywords
oil
rotary shaft
cylinder
discharge hole
length region
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.)
Pending
Application number
EP23824080.8A
Other languages
German (de)
English (en)
Other versions
EP4443005A4 (fr
Inventor
Joonhyung Kim
Munseong KWON
Jaewoo Park
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
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
Priority claimed from KR1020220074443A external-priority patent/KR20230173540A/ko
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP4443005A1 publication Critical patent/EP4443005A1/fr
Publication of EP4443005A4 publication Critical patent/EP4443005A4/fr
Pending legal-status Critical Current

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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
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • 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
    • F04C23/001—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 of similar working principle
    • 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
    • F04C29/023—Lubricant distribution through a hollow driving shaft
    • 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
    • F04C29/025—Lubrication; Lubricant separation using a lubricant pump
    • 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
    • F04C29/028—Means for improving or restricting lubricant flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • F04D29/061—Lubrication especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/181—Axial flow rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/02—Compressor arrangements of motor-compressor units
    • F25B31/026—Compressor arrangements of motor-compressor units with compressor of rotary type
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F04C2230/604—Mounting devices for pumps or compressors
    • 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
    • F04C2240/00—Components
    • F04C2240/10—Stators
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • 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
    • F04C2240/00—Components
    • F04C2240/60—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/10—Stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/60—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication

Definitions

  • Apparatuses and methods consistent with the disclosure relate to a rotary compressor in which upper and lower regions of an oil paddle are twisted in different directions to increase an oil supply rate, and a home appliance including the same.
  • a compressor is a mechanical device that increases pressure by compressing air, a refrigerant, or other various working gases using a motor or turbine.
  • the compressor may be used in various ways throughout the industry, and may convert a low-pressure refrigerant into a high-pressure refrigerant and transfer the high-pressure refrigerant to a condenser.
  • Compressors are largely divided into a reciprocating compressor in which a compression space for absorbing or discharging a working gas is provided between a piston and a cylinder to allow the piston to compress a refrigerant while making a linear reciprocating motion within the cylinder, a scroll compressor in which a compression space for absorbing or discharging a working gas is provided between an orbiting scroll and a fixed scroll to allow the orbiting scroll to compress a refrigerant while rotating about the fixed scroll, and a rotary compressor in which a compression space for absorbing or discharging a working gas is provided between a rolling piston rotating eccentrically and a cylinder to allow the rolling piston to compress a refrigerant while eccentrically rotating along an inner wall of the cylinder.
  • an oil paddle twisted only in one direction is inside a rotary shaft to be rotated together with the rotary shaft so as to raise or transmit oil stored in a case.
  • the oil raised by the oil paddle is sprayed toward the outside of the rotary shaft through an oil hole defined in the rotary shaft, to perform lubrication and sealing operations.
  • a gas hole is defined in an upper part of the rotary shaft to remove a refrigerant from the inside of the rotary shaft when the compressor is initially started, the oil raised by the oil paddle may unintentionally leak to the outside through the gas hole.
  • the disclosure provides a rotary compressor in which upper and lower regions of an oil paddle are twisted (e.g., fixed in a twisted configuration relative to a rotation axis) in different directions to increase an oil supply rate, and a home appliance including the same.
  • a rotary compressor includes a case configured to store oil, a cylinder disposed inside the case, having an inner space, and including a rolling piston configured to rotate with eccentricity in the inner space and a vane configured to divide the inner space into a suction chamber and a compression chamber while in contact with the rolling piston, a rotary shaft configured to rotate in a first direction while being coupled to the rolling piston, and including an oil channel space formed in the rotary shaft in a longitudinal direction, an oil hole for communication of the oil channel space with the outside, and a gas hole above the oil hole, and an oil paddle accommodated in the oil channel space to be rotated together with the rotary shaft, in which the oil paddle includes a first region twisted in a second direction opposite to the first direction to raise the oil, and a second region located above the first region and twisted in the first direction to lower the oil.
  • the first region may be twisted in the second direction from a lower end to an upper end, and the second region may be twisted in the first direction from a lower end to an upper end.
  • the rotary shaft may rotate about a central axis in the longitudinal direction, the first region may be twisted in the second direction with respect to the central axis, and the second region may be twisted in the first direction with respect to the central axis.
  • the lower end of the second region may be located above the oil hole.
  • the upper end of the first region may be located below the oil hole.
  • the oil paddle may include a third region located between the first and second regions and having a flat plate shape.
  • a plurality of oil holes may be provided in a longitudinal direction of the rotary shaft, and the cylinder may be located below an uppermost oil hole among the plurality of oil holes.
  • the rotary compressor may further include a flange member configured to close the inner space of the cylinder, and the gas hole may be located above the flange member.
  • the oil hole and the gas hole may be formed in a radial direction of the oil channel space.
  • a lower end of the rotary shaft may be disposed adjacent to a lower surface of the case to be immersed in the oil.
  • At least one of the upper end or the lower end of the first region may have a flat plate shape.
  • At least one of the upper end or the lower end of the second region may have a flat plate shape.
  • the cylinder may include a first cylinder and a second cylinder that are disposed vertically, and the rotary compressor may further include a middle plate between the first and second cylinders, and a flange member configured to close the inner space of the cylinder and including a first flange above the first cylinder and a second flange below the second cylinder.
  • a home appliance controls a temperature through the exchange of heat with the outside using a refrigerant and includes a rotary compressor, in which the rotary compressor includes a case configured to store oil, a cylinder disposed inside the case, having an inner space, and including a rolling piston configured to rotate with eccentricity in the inner space and a vane configured to divide the inner space into a suction chamber and a compression chamber while in contact with the rolling piston, a rotary shaft configured to rotate in a first direction while being coupled to the rolling piston, and including an oil channel space formed in the rotary shaft in a longitudinal direction, an oil hole configured to communicate the oil channel space with the outside, and a gas hole above the oil hole, and an oil paddle accommodated in the oil channel space to be rotated together with the rotary shaft, where the oil paddle includes a first region twisted in a second direction opposite to the first direction to raise the oil, and a second region located above the first region and twisted in the first direction to lower the oil.
  • the home appliance may be an air conditioner, a refrigerator, or a freezer.
  • FIG. 1 is a perspective side view of a rotary compressor 1 according to an embodiment of the disclosure.
  • FIG. 2 is a cross-sectional view of a rotary compressor 1 according to an embodiment of the disclosure.
  • FIG. 3 is a perspective view of a driving part 30 (e.g., otherwise referred to as a driver or a compressor driver) and a compressing part 40 (e.g., otherwise referred to as a compressor) according to an embodiment of the disclosure.
  • FIG. 4 is an exploded perspective view of a driving part 30 and a compressing part 40 according to an embodiment of the disclosure.
  • a freeze cycle includes four strokes of compression, condensation, expansion, and evaporation, and the four strokes of compression, condensation, expansion, and evaporation occur as a refrigerant is circulated through a rotary compressor 1, a condenser 2 (e.g., COND), an expansion valve 3, and an evaporator 4 (e.g., EVAP).
  • a condenser 2 e.g., COND
  • an expansion valve 3 e.g., EVAP
  • the rotary compressor 1 compresses and discharges a refrigerant gas at a relatively high temperature and under a relatively high pressure (e.g., a high-temperature and high-pressure refrigerant gas) and the high-temperature and high-pressure refrigerant gas discharged from the rotary compressor 1 is introduced into the condenser 2.
  • a relatively high pressure e.g., a high-temperature and high-pressure refrigerant gas
  • the condenser 2 condenses the refrigerant gas which is compressed by the rotary compressor 1, into a liquid form during a condensation process (e.g., a condensed refrigerant gas), and heat as a byproduct is emitted to the outside during the condensation process.
  • a condensation process e.g., a condensed refrigerant gas
  • the expansion valve 3 expands the condensed high-temperature and high-pressure refrigerant gas, in (or into) a low-pressure state (e.g., an expanded refrigerant gas or low-pressure expanded refrigerant).
  • the evaporator 4 achieves a refrigerating effect through the exchange of heat with an object which is to be cooled, using evaporative latent heat while evaporating the expanded refrigerant gas in an evaporation process, to transfer the evaporated refrigerant gas, which is evaporated in a low-temperature and low-pressure state, back to the rotary compressor 1.
  • the rotary compressor 1 may be disposed in an indoor space, and a temperature of air in the indoor space may be controlled using the refrigerating through the above-described cycle.
  • One or more embodiment includes a home appliance controlling a temperature (e.g., an internal temperature of the appliance, a temperature of an internal material, etc.) through heat exchange using a refrigerant.
  • a home appliance equipped with such a cooling cycle described above using a refrigerant may be an air conditioner, a refrigerator, or a freezer.
  • embodiments are not limited thereto and are applicable to various types of home appliances equipped with a cooling cycle.
  • the rotary compressor 1 may include refrigerant inlets 12a and 12b connected to the evaporator 4 to introduce a refrigerant from the evaporator 4, and a refrigerant outlet 11 connected to the condenser 2 to discharge a refrigerant compressed at high temperature and under high pressure from the rotary compressor 1.
  • the rotary compressor 1 may further include a case 10 that forms an exterior appearance of the rotary compressor 1, a compressing part 40 included in the case 10 to compress the refrigerant introduced into the case 10 through the refrigerant inlets 12a and 12b, and a driving part 30 connected to the compressing part 40 to drive the compressing part 40.
  • the refrigerant inlets 12a and 12b may branch from an accumulator 20 and be connected to a first cylinder 43 and a second cylinder 45, respectively.
  • the case 10 may be sealed to divide the case 10 into the inside (e.g., an interior or inner space) and the outside (e.g., an exterior or external space) and discharge a refrigerant compressed by the compressing part 40 only through the refrigerant outlet 11.
  • the case 10 may be formed in various shapes in cross-section as necessary. Oil O may be stored in a bottom of the case 10.
  • the accumulator 20 may be disposed between each of the refrigerant inlets 12a and 12b of the rotary compressor 1, and the evaporator 4, respectively.
  • the accumulator 20 may temporarily store a part (or portion of the low-temperature and low-pressure refrigerant supplied from the evaporator 4, which does not change into a gas and is in a liquid form, to prevent the refrigerant, which is in the liquid form, flowing into the rotary compressor 1. That is, only the refrigerant that is in the liquid form remains in the accumulator 20, and the refrigerant that is a gaseous state may be introduced into the rotary compressor 1.
  • the driving part 30 may include a stator 31 fixed on an inner side of the case 10 and a rotor 32 which is rotatably installed inside the stator 31 to be rotatable.
  • a rotary shaft 100 may be provided inside the rotor 32 to be rotatable together with the rotor 32.
  • the rotary shaft 100 may be coupled to the compressing part 40 to rotate rolling pistons P1 and P2 of the compressing part 40 so as to compress a refrigerant introduced into the compressing part 40.
  • the driving part 30 may be connected to the compressing part 40, through the rotary shaft 100, to transmit power to the compressing part 40.
  • the compressing part 40 may include an upper muffler 41, flange members 42 and 46, cylinders 43 and 45, a middle plate 44, and a lower muffler 47.
  • the rotary compressor 1 may have various dimensions along different directions. Referring to FIGS. 1 and 2 , for example, a vertical direction may define a first direction, a horizontal direction in FIG. 1 may define a second direction, and a horizontal direction in FIG. 2 may define a third direction, where the first to third directions cross each other.
  • the cylinders 43 and 45 may include a first cylinder 43 and a second cylinder 45 that are disposed vertically.
  • the middle plate 44 may be disposed between the first and second cylinders 43 and 45 along the vertical (or height) direction of the rotary compressor 1.
  • the flange members 42 and 46 may include a first flange member 42 on the first cylinder 43 and a second flange member 46 below the second cylinder 45 to close an inner space 43c of the cylinder 43 and an inner space 45c of the cylinder 45.
  • the inner space 43c of the first cylinder 43 may be closed by the first flange member 42 and the middle plate 44 together with each other to define an enclosed space.
  • the inner space 45c of the second cylinder 45 may be closed by the second flange member 46 and the middle plate 44 together with each other.
  • the flange member as one or more of the flange members 42 and 46, with or without the middle plate 44, is inside the case 10 and encloses the inner space of the cylinder.
  • the gas discharge hole is above the flange member, along the longitudinal direction.
  • the first flange member 42 may include a valve member 42a on an upper side thereof to selectively discharge the refrigerant compressed in the first cylinder 43.
  • the second flange member 46 may include a valve member (not shown) on a lower side thereof to selectively discharge the refrigerant compressed in the second cylinder 45.
  • the rotary compressor 1 according to an embodiment of the disclosure is illustrated as a double cylinder structure but is not limited thereto and may have a single cylinder structure.
  • the first and second cylinders 43 and 45 may be disposed inside the case 10, may respectively have the inner spaces 43c and 45s, and respectively include the rolling pistons P1 and P2 that rotate with eccentricity in the inner spaces 43c and 45c, and vanes 43b and 45b that are in contact with the rolling pistons P1 and P2 to divide each of the inner spaces 43c and 45c into a suction chamber and a compression chamber.
  • the first and second cylinders 43 and 45 may respectively include intakes 43a and 45a for communication with the outside (e.g., outside of the compressing part 40), and the inner spaces 43c and 45c, respectively.
  • the rolling pistons P1 and P2 are formed in a cylindrical shape, and eccentric parts 131 and 132 coupled to the rotary shaft 100 may be disposed in the rolling pistons P1 and P2, respectively. As the rotary shaft 100 rotates, the eccentric parts 131 and 132 are moved to cause the rolling pistons P1 and P2 to be moved while being rotated.
  • the rolling pistons P1 and P2 of the first and second cylinders 43 and 45 may be rotated eccentrically to be 180 degrees out of phase with each other in the circumferential direction of the rotary shaft 100.
  • the inner spaces 43c and 45c of the first and second cylinders 43 and 45 are spaces in which a refrigerant is suctioned and compressed and may have a cylindrical shape but the shapes in cross-section or in three-dimension thereof may vary depending on the shapes of the rolling pistons P1 and P2.
  • the first and second cylinders 43 and 45 may include elastic members (not shown) for continuously pressing (e.g., biasing) the vanes 43b and 45b toward the rolling pistons P1 and P2. Accordingly, even when the rolling pistons P1 and P2 are moved while being rotated in the inner spaces 43c and 45c due to the rotation of the rotary shaft 100, the vanes 43b and 45b may be in continuous contact with the rolling pistons P1 and P2 due to the elastic members. Thus, when the rolling piston P1 and P2 are moved while being rotated, the inner spaces 43c and 45c of the first and second cylinder 43 and 45 may be divided into a suction chamber and a compression chamber.
  • the suction chamber of the first cylinder 43 may be connected to the intake 43a, and a refrigerant introduced through the intake 43a may be stored in the suction chamber.
  • the compression chamber of the second cylinder 45 is a space in which the introduced refrigerant is compressed by a turning movement of the rolling piston P2, and the volume thereof may repeatedly increase or decrease (e.g., one of increase and decrease) due to the turning movement of the rolling piston P2.
  • the upper muffler 41 may cover an upper surface of the first flange member 42.
  • the lower muffler 47 may cover a lower surface of the second flange member 46. Accordingly, the noise of a refrigerant gas discharged from the flange members 42 and 46 may decrease.
  • the rotary shaft 100 may rotate in a first rotation direction R1 of FIG. 5 while being coupled to the rolling pistons P1 and P2.
  • the rotary shaft 100 may include or define an oil channel space 101 formed therein in a longitudinal direction, an oil hole 110 for communication of the oil channel space 101 with an outside of the rotary shaft 100, and a gas hole 120 above the oil hole 110.
  • a lower end 102 of the rotary shaft 100 may be located adj acent to or corresponding to a lower surface 10a of the case 10, to be immersed in the oil O.
  • the case 10 stores the oil O
  • each of the rotary shaft 100 and the case 10 includes a lower end furthest from the gas discharge hole (e.g., the gas hole 120), and the lower end of the rotary shaft 100 is immersed in the oil O which is stored in the case 10, at the lower end of the case 10.
  • the rotary compressor 1 may include an oil paddle 200 accommodated in the oil channel space 101 to be rotated with the rotary shaft 100 (e.g., rotatable together with rotation of the rotary shaft 100).
  • the oil O When the rotary shaft 100 rotates, the oil O may be raised along the oil channel space 101 by the oil paddle 200, in a vertical flow direction from the lower surface 10a toward the refrigerant outlet 11, and sprayed toward the components of the compressing part 40 such as in a radial direction, through the oil hole 110 as an oil discharge hole. Accordingly, the components of the compressing part 40 may be lubricated with the oil O (e.g., the radially-sprayed oil) and gaps between the components may be sealed with the oil O, thus preventing the refrigerant from being unintentionally discharged.
  • the oil O e.g., the radially-sprayed oil
  • the oil channel space 101 of the rotary shaft 100 is filled with a refrigerant gas and thus the refrigerant gas may interfere with the flow of the oil O before the rotary compressor 1 is started.
  • the refrigerant gas in the oil channel space 101 may be removed by being discharged to the outside of the rotary shaft 100 through the gas hole 120 as a gas discharge hole. That is, the gas hole 120 may be defined by portions of the rotary shaft 100 and be in communication (e.g., fluid communication) with the oil channel space 101 and an outside of the rotary shaft 100.
  • the gas of the refrigerant which is compressed by the rotary compressor 1 is moveable along the oil channel space 101, the rotation of the rotary shaft 100 in the first rotation direction further includes the gas of the refrigerant which is in the oil channel space 101 being moved in the oil channel space 101 and discharged through the gas discharge hole of the rotary shaft 100.
  • the oil hole 110 and the gas hole 120 may be formed to extend in a radial direction of the oil channel space 101, that is, have a major dimension in the radial direction.
  • the oil hole 110 and the gas hole 120 may be formed horizontally.
  • the major dimension of one or more of the oil hole 110 and the gas hole 120 may be minimal when defined along the horizontal direction.
  • a plurality of oil holes 110 may be defined (or formed) in (or along) a longitudinal direction of the rotary shaft 100.
  • the plurality of oil holes 110 may be arranged along the vertical direction of the rotary shaft 100.
  • the cylinders 43 and 45 may be provided below an uppermost oil hole 110a among the plurality of oil holes 110. That is, the uppermost oil hole 110a may be located above the cylinders 43 and 45.
  • the rotary shaft 100 further defines the oil discharge hole (e.g., the oil hole 110) in plural including a plurality of oil holes 110 arranged along the longitudinal direction, and an uppermost oil hole 110a which is closest to the gas discharge hole among the plurality of oil holes 110, and the cylinder (e.g., one or more of the cylinders 43 and 45) is below the uppermost oil hole 110a.
  • the oil discharge hole e.g., the oil hole 110
  • the oil hole 110 in plural including a plurality of oil holes 110 arranged along the longitudinal direction, and an uppermost oil hole 110a which is closest to the gas discharge hole among the plurality of oil holes 110, and the cylinder (e.g., one or more of the cylinders 43 and 45) is below the uppermost oil hole 110a.
  • the gas hole 120 may be located above the flange members 42 and 46. Specifically, the gas hole 120 may be located above the first flange member 42 and formed horizontally from the oil channel space 101 and extended toward the driving part 30.
  • FIG. 5 is an exploded perspective view of a rotary shaft 100 and an oil paddle 200 according to an embodiment of the disclosure.
  • FIG. 6 is a cross-sectional view of a rotary shaft 100 and an oil paddle 200 according to an embodiment of the disclosure.
  • the oil paddle 200 may include a first region 210 and a second region 220 in the longitudinal direction.
  • the first region 210 may extend from the second region 220, along the length of the oil paddle 200, to define a first length region of the oil paddle 200.
  • the oil paddle 200 may include a flat plate which is twisted about a rotation axis, at more than one location along the length of the oil paddle 200, to define a second length region of the oil paddle 200.
  • the first region 210 may be twisted in a second rotation direction R2 opposite to the first rotation direction R1 such that rotation of the oil paddle 200 raises the oil O in a direction from the compressing part 40 to the driving part 30 in a direction along the height of the rotary compressor 1.
  • the oil O stored in the oil channel space 101 may be raised by contact with an outer surface of the first region 210 that is being rotated in the first rotation direction R1 together with rotation of the rotary shaft 100 since the flat plate profile of the oil paddle 200 is fixedly twisted in the second rotation direction R2 at the first region 210.
  • the second region 220 as an upper end region of the oil paddle 200 may be located above the first region 210 and fixedly twisted in the first rotation direction R1 to affect a lowering of the oil O. That is, the oil O stored in the oil channel space 101 may be lowered by contact with an outer surface of the second region 220 that is being rotated in the first rotation direction R1 together with rotation of the rotary shaft 100, since the flat plate profile of the oil paddle 200 is fixedly twisted in the first rotation direction R1 at the second region 220.
  • a location of the first region 210 of the oil paddle 200 corresponds to a location of the oil hole 110, along a length (or height) of the oil channel space 101. Accordingly, the oil O may be easily raised to a height corresponding to the first region 210 and discharged to the outside through the oil hole 110, together with a downward force D may be applied to the oil O due to the second region 220, thereby preventing the oil O from unintentionally leaking through the gas hole 120.
  • rotation of the rotary shaft 100 in the first rotation direction includes the first length region (e.g., the first region 210) of the oil paddle 200 transferring the oil O along the oil channel space 101 and in the longitudinal direction, toward the gas discharge hole, together with the second length region (e.g., the second region 220) of the rotary shaft 100 transferring the oil O along the oil channel space 101 and in the longitudinal direction, away from the gas discharge hole.
  • first length region e.g., the first region 210
  • second length region e.g., the second region 220
  • an oil supply rate may increase, since the discharge pressure of the oil O increases sharply in a region to an upward force U to be applied to the first region 210 and a downward force D to be applied to the second region 220 are applied simultaneously.
  • the first region 210 may be fixedly twisted in the second rotation direction R2, from a lower end 212 to an upper end 211.
  • the second region 220 may be fixedly twisted in the first rotation direction R1, from a lower end 222 to an upper end 221. That is, each of the first length region and the second length region includes both a lower end furthest from the gas discharge hole and an upper end closest to the gas discharge hole.
  • the rotary shaft 100 may rotate about a central axis A as a rotation axis extended in the longitudinal direction.
  • the first region 210 may be fixedly twisted in the second rotation direction R2 with respect to the central axis A, and the second region 220 may be fixedly twisted in the first rotation direction R1 with respect to the central axis A.
  • the lower end 222 of the second region 220 may be located above the oil hole 110. Accordingly, the oil O may be easily raised to a height at which the oil hole 110 is located by an upward force U applied by the first region 210.
  • the upper end 211 of the first region 210 may be located below the uppermost oil hole 110a. Accordingly, the oil O cannot be easily raised to a height at which the gas hole 120 is located due to a downward force D applied by the second region 220.
  • the oil paddle 200 may include a third region 230 (e.g., a third length region) located between the first and second regions 210 and 220 and having a flat plate shape.
  • the oil paddle 200 may be flat (e.g., untwisted at the third region 230). Referring to FIG. 5 , for example, a width in a radial direction of the oil paddle 200 at the first region 210 may be greater than a width in the radial direction of the second region 220 and/or the third region 230.
  • the third region 230 may indicate the lower end 222 of the second region 220.
  • the position of the second region 220 may be adjusted using the length of the third region 230 in a length direction of the oil paddle 200.
  • a height of the second region 220 from bottom end of the oil channel space 101 may be raised (e.g., positioned further from the bottom end) by increasing the length of the third region 230 or lowered (e.g., positioned closer to the bottom end) by reducing the length of the third region 230.
  • the third region 230 may be a length portion of the oil paddle 200 at which a fixed rotation direction of length portions of the oil paddle 200 is changed.
  • an upper length portion (e.g., the second region 220) of the oil paddle 200 has a first fixed rotation direction (e.g., the same as the first rotation direction R1), together with the lower length portion (e.g., the first region 210) having a second fixed rotation opposite to the first fixed rotation direction (e.g., the second rotation direction R2)
  • the upper end 211 and the lower end 212 may be opposing ends of the first region 210.
  • the upper end 221 and the lower end 222 may be opposing ends of the second region 220.
  • the upper end 221 and the lower end 212 may each be a distal end among opposing ends of the oil paddle 200.
  • At least one of the upper end 211 or the lower end 212 of the first region 210 may have a flat plate shape or be fixedly untwisted relative to a middle portion fixedly twisted between the opposing ends thereof.
  • At least one of the upper end 221 or the lower end 222 of the second region 220 may have a flat plate shape . Accordingly, the upper end 211 of the first region 210 and the lower end 222 of the second region 220 may be easily combined with each other.
  • the oil channel space 101 further defines a first channel length corresponding to the cylinder (e.g., a portion of the oil channel space 101 which corresponds to the first region 210), and a second channel length which is connected to the first channel length, and extends further than an upper end of the cylinder and toward the gas discharge hole 120 of the rotary shaft 100 (e.g., a portion of the oil channel space 101 which corresponds to the second region 220).
  • the oil paddle 200 which is in the oil channel space 101 includes the first length region of the oil paddle 200 corresponding to the first channel length, and the second length region of the oil paddle 200 corresponding to the second channel length.
  • the lower end 212 of the first region 210 may be fixed flat, the upper end 211 of the first region 210 may be twisted in the second rotation direction R2, the lower end 222 of the second region 220 may be fixed flat, the upper end 221 of the second region 220 may be twisted in the first rotation direction R1, and the upper end 211 of the first region 210 and the lower end 222 of the second region 220 which are flat may be combined with each other to define the third region 230. Accordingly, the oil paddle 200 twisted in different directions at different locations along the length of the oil paddle 200 may be manufactured.
  • the method of manufacturing or providing the oil paddle 200 is not limited thereto and the oil paddle 200 may be manufactured by fixing a middle part of one flat plate such as at the third region 230, and twisting an upper end section (e.g., at the second region 220) and a lower end section (e.g., at the first region 210) of the flat panel in the same direction.
  • a home appliance includes a rotary compressor 1 which compresses a gas of the refrigerant, where the rotary compressor 1 includes a case 10 extended in a longitudinal direction, a cylinder which is inside the case 10 and is lubricated by oil O, the cylinder defining an inner space of the cylinder, and including a rolling piston which rotates eccentrically within the inner space of the cylinder, a rotary shaft 100 which extends along the inner space of the cylinder, is coupled to the rolling piston and rotates in a first rotation direction, the rotary shaft defining an oil channel space 101 of the rotary shaft 100 which extends along the longitudinal direction and along which the oil O moves, together with along the oil channel space an oil discharge hole 110 of the rotary shaft 100 which corresponds to the cylinder and fluidly connects the oil channel space 101 with outside of the rotary shaft 100, and a gas discharge hole of the rotary shaft 100 which is above the cylinder and fluidly connects the oil channel space 101 with the outside the rotary shaft 100, and an oil paddle 200 which
  • the oil paddle 200 includes a first length region twisted in a second rotation direction opposite to the first rotation direction, and a second length region which is closer to the gas discharge hole 120 than the first length region and twisted in the same direction as the rotation of the rotary shaft 100.
  • rotation of the rotary shaft 100 in the first rotation direction includes the first length region of the oil paddle 200 transferring the oil O along the oil channel space 101 and in the longitudinal direction, toward the gas discharge hole 120, together with the second length region of the rotary shaft 100 transferring the oil O along the oil channel space 101 and in the longitudinal direction, away from the gas discharge hole 120.
  • the gas of the refrigerant is moveable along the oil channel space 101
  • the rotation of the rotary shaft 100 in the first rotation direction further includes the oil paddle 200 moving the gas of the refrigerant within the oil channel space 101 and discharging the gas of the refrigerant which is moved, to outside the rotary shaft 100, through the gas discharge hole 120 of the rotary shaft 100.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP23824080.8A 2022-06-17 2023-04-28 Compresseur rotatif et appareil ménager le comprenant Pending EP4443005A4 (fr)

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KR1020220074443A KR20230173540A (ko) 2022-06-17 2022-06-17 로터리 압축기 및 이를 포함하는 가전기기
PCT/KR2023/005881 WO2023243854A1 (fr) 2022-06-17 2023-04-28 Compresseur rotatif et appareil ménager le comprenant

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EP4443005A4 (fr) * 2022-06-17 2025-05-28 Samsung Electronics Co., Ltd. Compresseur rotatif et appareil ménager le comprenant

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US12055325B2 (en) 2024-08-06

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