EP3415765B1 - Compresseur à spirales - Google Patents

Compresseur à spirales Download PDF

Info

Publication number
EP3415765B1
EP3415765B1 EP18171091.4A EP18171091A EP3415765B1 EP 3415765 B1 EP3415765 B1 EP 3415765B1 EP 18171091 A EP18171091 A EP 18171091A EP 3415765 B1 EP3415765 B1 EP 3415765B1
Authority
EP
European Patent Office
Prior art keywords
bypass
scroll
compression
wrap
bypass holes
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.)
Active
Application number
EP18171091.4A
Other languages
German (de)
English (en)
Other versions
EP3415765A1 (fr
Inventor
Yongkyu Choi
Cheolhwan Kim
Sangbaek Park
Taekyoung Kim
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 EP3415765A1 publication Critical patent/EP3415765A1/fr
Application granted granted Critical
Publication of EP3415765B1 publication Critical patent/EP3415765B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • 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
    • 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
    • F04C18/0261—Details of the ports, e.g. location, number, geometry
    • 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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/18—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the volume of the working chamber
    • F04C28/22—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • 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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C28/26—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • 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
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/46—Conditions in the working chamber
    • 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

Definitions

  • the present disclosure relates to a scroll compressor, and more particularly, to a bypass hole for bypassing a part of refrigerant compressed prior to discharge.
  • the scroll compressor is a compressor forming a compression chamber made of a suction chamber, an intermediate pressure chamber, and a discharge chamber between both scrolls while performing a relative orbiting motion in engagement with a plurality of scrolls.
  • Such a scroll compressor may obtain a relatively high compression ratio as compared with other types of compressors while smoothly connecting suction, compression, and discharge strokes of refrigerant, thereby obtaining stable torque. Therefore, the scroll compressor is widely used for compressing refrigerant in an air conditioner or the like.
  • a high-efficiency scroll compressor having a lower eccentric load and an operation speed at 180 Hz or higher has been introduced.
  • the behavior characteristics of the scroll compressor may be determined by the shape of a fixed wrap and an orbiting wrap.
  • the fixed wrap and the orbiting wrap may have any shape, but usually have a form of an involute curve that can be easily processed.
  • the involute curve denotes a curve corresponding to a trajectory drawn by an end of thread when the thread wound around a base circle having an arbitrary radius is released.
  • a thickness of the wrap is constant and a capacity change rate may be also constant, and therefore, a number of turns of the wrap should be increased to obtain a high compression ratio, but in this case, it has a drawback in which a size of the compressor also increases.
  • the orbiting scroll is typically formed on one lateral surface of a circular disk-shaped end plate and the orbiting wrap, and a boss portion is formed on a rear surface that is not formed with the orbiting wrap and connected to a rotation shaft for orbitally driving the orbiting scroll.
  • Such a shape may form an orbiting wrap over a substantially overall area of the end plate, thereby decreasing a diameter of the end plate portion for obtaining the same compression ratio.
  • an action point to which a repulsive force of refrigerant is applied and an action point to which a reaction force for cancelling out the repulsive force is applied are separated from each other in a vertical direction, thereby causing a problem of increasing vibration or noise while the behavior of the orbiting scroll becomes unstable during the operation process.
  • a bypass hole may be formed in the middle of the compression chamber similarly to a typical scroll compressor to discharge a part of refrigerant to be compressed in advance.
  • a discharge port may be formed at a position eccentric from the center of the orbiting scroll, thereby causing a difference in flow rate of refrigerant while compression gradients (volume reduction gradients) of both compression chambers become different from each other.
  • a compression chamber hereinafter, referred to as a second compression chamber or a B pocket
  • a first compression chamber or a A pocket a compression chamber having a longer compression path length
  • a speed of refrigerant in the second compression chamber may become higher than the speed of refrigerant in the first compression chamber. Accordingly, over compression may occur in the second compression chamber as compared to the first compression chamber, thereby reducing the overall efficiency of the compressor.
  • bypass holes belonging to both compression chambers may be formed to have the same cross-sectional area at the same rotation angle position, and therefore, a difference in compression gradient with respect to both compression chambers cannot be solved.
  • over-compression loss may occur in a compression chamber having a larger compression gradient (i.e., second compression chamber) as described above, thereby causing a problem of reducing the overall compression efficiency of the entire compressor.
  • WO 2014/189240 A1 and JP 2001 200795 A discloses scroll compression having bypass holes to prevent over-compression at compression chambers.
  • An object of the present disclosure is to provide a scroll compressor capable of minimizing over-compression loss in a compression chamber having a large compression gradient when compression gradients (or volume reduction gradients) of both compression chambers are different from each other.
  • Another object of the present disclosure is to provide a scroll compressor capable of reducing a compression gradient difference between both compression chambers when compression gradients (or volume reduction slopes) of both compression chambers are different from each other.
  • an overall cross-sectional area of the first bypass holes may be formed to be the same as that of the second bypass holes across the entire range of a rotation angle along the first wrap with respect to an axial center of the rotating shaft.
  • an overall cross-sectional area of the second bypass holes may be formed to be larger than an overall cross-sectional area of the first bypass holes.
  • a number of the first bypass holes may be formed to be the same as a number of the second bypass holes across the entire range of a rotation angle along the first wrap with respect to an axial center of the rotating shaft.
  • a number of the second bypass holes may be formed to be larger than that of the first bypass holes within the range.
  • the discharge port may include a first discharge port communicating with the first compression chamber; and a second discharge port communicating with the second compression chamber.
  • each bypass portion has the same number of bypass holes.
  • each bypass portion has the same cross-sectional area of bypass holes.
  • a number of bypass holes corresponding to the at least one second bypass hole is formed to be larger than a number of bypass holes corresponding to the at least one first bypass hole.
  • a total cross-sectional area of the bypass holes corresponding to the at least one second bypass hole is formed to be larger than that of the bypass holes corresponding to the at least one first bypass hole.
  • the frame is provided below the drive motor, and the first scroll is provided below the frame.
  • the frame has a first shaft receiving hole formed in an axial direction
  • the second scroll has a rotation shaft coupling portion formed at an inner end portion of the second wrap in the axial direction
  • the first scroll has a second shaft receiving hole formed in the axial direction.
  • a scroll compressor may be divided into a low pressure type in which a suction pipe is communicated with an internal space of a casing constituting a low pressure portion and a high pressure type in which a suction pipe is directly communicated with the compression chamber. Accordingly, in the low pressure type, a drive unit is provided in a suction space which is a low pressure portion, however, in the high pressure type, a drive unit is provided in a discharge space which is a high pressure portion.
  • Such a scroll compressor may be divided into an upper compression type and a lower compression type according to the positions of the drive unit and the compression unit, and it is referred to as an upper compression type when the compression unit is located above the drive unit, and referred to as a lower compression type when the compression unit is located below the drive unit.
  • a scroll compressor of a type in which a rotating shaft overlaps with an orbiting wrap on the same plane in a lower compression type scroll compressor will be described as a representative example.
  • This type of scroll compressor is known to be suitable for application to refrigeration cycles under high temperature and high compression ratio conditions.
  • FIG. 1 is a longitudinal sectional view illustrating a lower compression type scroll compressor according to the present disclosure
  • FIG. 2 is a cross-sectional view illustrating a compression unit in FIG. 1
  • FIG. 3 is a front view illustrating a part of a rotating shaft for explaining a sliding portion in FIG. 1
  • FIG. 4 is a longitudinal sectional view for explaining the oil supply passage between a back pressure chamber and a compression chamber in FIG. 1 .
  • a lower compression type scroll compressor may be provided with a motor drive unit 20 having a drive motor within a casing 10 to generate a rotational force, and provided with a compression unit 30 having a predetermined space (hereinafter, referred to as an intermediate space) 10a below the motor drive unit 20 to receive rotational force of the motor drive unit 20 and compress refrigerant.
  • a motor drive unit 20 having a drive motor within a casing 10 to generate a rotational force
  • a compression unit 30 having a predetermined space (hereinafter, referred to as an intermediate space) 10a below the motor drive unit 20 to receive rotational force of the motor drive unit 20 and compress refrigerant.
  • the casing 10 may include a cylindrical shell 11 constituting a sealed container, an upper shell 12 covering an upper portion of the cylindrical shell 11 to constitute a sealed container together, and a lower shell 13 covering a lower portion of the cylindrical shell 11 to constitute a sealed container together as well as forming an oil storage space 10c.
  • the refrigerant suction pipe 15 may pass through a lateral surface of the cylindrical shell 11 and directly communicate with a suction chamber of the compression unit 30, and a refrigerant discharge pipe 16 communicating with an upper space 10b of the casing 10 may be provided at an upper portion of the upper space 12.
  • the refrigerant discharge pipe 16 may correspond to a passage through which compressed refrigerant discharged to the upper space 10b of the casing 10 from the compression unit 30 is discharged to the outside, and the refrigerant discharge pipe 16 may be inserted up to the middle of the upper space 10b of the casing 10 to allow the upper space 10b to form a kind of oil separation space.
  • an oil separator (not shown) for separating oil mixed with refrigerant may be connected to the refrigerant suction pipe 15 at an inside of the casing 10 or within the upper space 10b including the upper space 10b.
  • the motor drive unit 20 may include a stator 21 and a rotor 22 rotating at an inside of the stator 21.
  • the stator 21 is formed with teeth and slots forming a plurality of coil winding portions (not shown) along a circumferential direction on an inner circumferential surface thereof, and a coil 25 is wound therearound, and a gap between an inner circumferential surface of the stator 21 and an outer circumferential surface of the rotor 22 and the coil winding portions are combined to form a second refrigerant passage (P G2 ).
  • a plurality of D-cut faces 21a are formed on an outer circumferential surface of the stator 21 along a circumferential direction, and D-cut face 21a may be formed with a first oil passage (P O1 ) to allow oil to pass between an inner circumferential surface of the cylindrical shell 11 and the D-cut face 21a.
  • P O1 first oil passage
  • P O2 second oil passage
  • a frame 31 constituting the compression unit 30 may be fixedly coupled to an inner circumferential surface of the casing 10 at a predetermined distance below the stator 21.
  • the outer circumferential surface of the frame 31 may be shrink-fitted or welded and fixedly coupled to an inner circumferential surface of the cylindrical shell 11.
  • annular frame sidewall portion (first sidewall portion) 311 is formed at an edge of the frame 31, and a plurality of communication grooves 311b are formed along a circumferential direction on an outer circumferential surface of the first sidewall portion 311.
  • a first shaft receiving portion 312 for supporting a main bearing portion 51 of a rotating shaft 50 which will be described later is formed in the center of the frame 31, and a first shaft receiving hole 312a may be formed in an axial direction on the first shaft receiving portion such that the upper plate 51 of the 50 of the rotating shaft 50 is rotatably inserted and supported in a radial direction.
  • a fixed scroll hereinafter, referred to as a first scroll
  • a second scroll eccentrically connected to the rotating shaft 50 interposed therebetween.
  • the first scroll 32 may be fixedly coupled to the frame 31, but may also be movably coupled in an axial direction.
  • the first scroll 32 has a fixed plate portion (hereinafter, referred to as a first plate portion 321) formed in a substantially disc shape, and a scroll sidewall portion (hereinafter, referred to as a second sidewall portion) 322 coupled to a lower edge of the frame 31 may be formed at an edge of the first plate portion 321.
  • a fixed plate portion hereinafter, referred to as a first plate portion 321
  • a scroll sidewall portion hereinafter, referred to as a second sidewall portion 322 coupled to a lower edge of the frame 31 may be formed at an edge of the first plate portion 321.
  • a suction port 324 through which the refrigerant suction pipe 15 communicates with the suction chamber may be formed in one side of the second sidewall portion 322, and a discharge port 325a, 325b communicating with a discharge chamber to discharge compressed refrigerant may be formed at a central portion of the first plate portion 321. Only one of the discharge ports 325a, 325b may be formed to communicate with both a first compression chamber (V1) and a second compression chamber (V2) which will be described later, but a plurality of discharge ports 325a, 325b may be also formed to independently communicate with compression chambers (V1, V2), respectively.
  • the foregoing communication groove 322b is formed on an outer circumferential surface of the second sidewall portion 322, and the communication groove 322b together with the communication groove 311b of the first sidewall portion 311 forms a second oil passage (P O2 ) for guiding oil to the lower space 10c.
  • a discharge cover 34 for guiding refrigerant discharged from the compression chamber (V) to a refrigerant passage which will be described later may be coupled to a lower side of the first scroll 32.
  • An inner space of the discharge cover 34 may be formed to receive an inlet of the first refrigerant passage (P G1 ) for guiding refrigerant discharged from the compression chamber (V) through the discharge port 325a, 325b to an upper space 10b of the casing 10, more particularly, a space between the motor drive unit 20 and the compression unit 30 while at the same receiving the discharge port 325a, 325b.
  • the first refrigerant passage (P G1 ) may be formed to sequentially pass through the second sidewall portion 322 of the fixed scroll 32 and the first sidewall portion 311 of the frame 31 from an inside of the passage separation unit 40, namely, the side of the rotating shaft 50, which is an inside based on the passage separation unit 40.
  • the foregoing second oil passage (P O2 ) is formed at an outside of the passage separation unit 40 to communicate with the first oil passage (P O1 ).
  • a fixed wrap (hereinafter, referred to as a first wrap) 323 constituting the compression chamber (V) in engagement with an orbiting wrap (hereinafter, referred to as a second wrap) which will be described later may be formed on an upper surface of the first plate portion 321.
  • the first wrap 323 will be described later together with the second wrap 332.
  • a second shaft receiving portion 326 for supporting a sub-bearing portion 52 of the rotating shaft 50 which will be described later may be formed at the center of the first plate portion 321, and a second bearing hole 326a penetrated in an axial direction to support the sub-bearing portion 52 in a radial direction may be formed on the second shaft receiving portion 326.
  • an orbiting plate portion (hereinafter, referred to as second plate portion) 331 may be formed in a substantially disc shape.
  • a second wrap 332 constituting a compression chamber in engagement with the first wrap 331 may be formed on a lower surface of the second plate portion 331.
  • the second wrap 332 may be formed in an involute shape together with the first wrap 323, but may be formed in various other shapes.
  • the second wrap 332 may have a shape in which a plurality of arcs having different diameters and origin points are connected, and the outermost curve may be formed in a substantially elliptical shape having a long axis and a short axis.
  • the first wrap 323 may be formed in a similar manner.
  • a rotating shaft coupling portion 333 constituting an inner end portion of second wrap 332 to which the eccentric portion 53 of the rotating shaft 50 which will be described later is inserted and coupled may be formed in a penetrating manner in an axial direction.
  • An outer circumferential portion of the rotating shaft coupling portion 333 is connected to the second wrap 332 to form the compression chamber (V) together with the first wrap 322 during the compression process.
  • the rotating shaft coupling portion 333 may be formed at a height overlapping with the second wrap 332 on the same plane, and the eccentric portion 53 of the rotating shaft 50 may be formed at a height overlapping with the second wraps 332 on the same plane.
  • the rotating shaft coupling portion 333 is formed with a concave portion 335 engaged with a protrusion portion 328 of the first wrap 323 which will be described later at an outer circumferential portion opposed to an inner end portion of the first wrap 323.
  • One side of the concave portion 335 is formed with an increasing portion 335a configured to increase a thickness thereof from an inner circumferential portion to an outer circumferential portion of the rotating shaft coupling portion 333 at an upstream side along the formation direction of the compression chamber (V). It may increase a compression path of the first compression chamber (V1) immediately before discharge, and consequently a compression ratio of the first compression chamber (V1) may be increased close to a pressure ratio of the second compression chamber (V2).
  • the first compression chamber (V1) is a compression chamber formed between an inner surface of the first wrap 323 and an outer surface of the second wrap 332, and will be described later separately from the second compression chamber (V2).
  • the other side of the concave portion 335 is formed with an arc compression surface 335b having an arc shape.
  • a diameter of the arc compression surface 335b is determined by a thickness of an inner end portion of the first wrap 323 (i.e., a thickness of the discharge end) and an orbiting radius of the second wrap 332, and when a thickness of an inner end portion of the first wrap 323 increases, a diameter of the arc compression surface 335b increases.
  • a thickness of the second wrap around the arc compression surface 335b may be increased to ensure durability, and the compression path may be lengthened to increase a compression ratio of the second compression chamber (V2) to that extent.
  • a protrusion portion 328 protruded to the side of an outer circumferential portion of the rotating shaft coupling portion 333 may be formed adjacent to an inner end portion (suction end or starting end) of the first wrap 323 corresponding to the rotation shaft coupling portion 333, the protrusion portion 328 may be formed with a contact portion 328a protruded from the protrusion portion and engaged with the concave portion 335.
  • an inner end portion of the first wrap 323 may be formed to have a larger thickness than other portions.
  • the compression chamber (V) is formed between the first plate portion 321 and the first wrap 323, and between the second wrap 332 and the second plate portion 331, and a suction chamber, an intermediate pressure chamber, and a discharge chamber may be sequentially formed along the proceeding direction of the wrap.
  • the compression chamber (V) includes a first compression chamber (V1) formed between an inner surface of the first wrap 323 and an outer surface of the second wrap 332, and a second compression chamber (V2) formed between an outer surface and an inner surface of the second wrap 332.
  • the first compression chamber (V1) includes a compression chamber formed between two contact points (P11, P12) generated by bringing an inner surface of the first wrap 323 into contact with an outer surface of the second wrap 332, and the second compression chamber (V2) includes a compression chamber formed between two contact points (P21, P22) formed by bringing an outer surface of the first wrap 323 into contact with an inner surface of the second wrap 332.
  • the first compression chamber (V1) immediately before discharge has an angle of ⁇ ⁇ 360° immediately before starting discharge, and a distance (I) between normal vectors at the two contact points (P11, P12) also has a value larger than zero.
  • the first compression chamber immediately before discharge may have a smaller volume as compared to a case where the first compression chamber has a fixed wrap and an orbiting wrap formed with an involute curve, it may be possible to enhance both a compression ratio of the first compression chamber (V1) and a compression ratio of the second compression chamber (V2) without increasing a size of the first wrap 323 and the second wrap 332.
  • the second scroll 33 may be orbitally provided between the frame 31 and the fixed scroll 32.
  • An oldham ring 35 for preventing the rotation of the second scroll 33 may be provided between an upper surface of the second scroll 33 and a lower surface of the frame 31, and a sealing member 36 for forming a back pressure chamber (S1) may be provided at an inner side than the oldham ring 35.
  • an intermediate pressure space is formed by the oil supply hole 321a provided in the second scroll 32 at an outer side of the sealing member 36.
  • the intermediate pressure space is communicated with the intermediate compression chamber (V) to perform the role of a back pressure chamber as refrigerant at an intermediate pressure is filled thereinto. Therefore, a back pressure chamber formed at an inner side with respect to the sealing member 36 may be referred to as a first back pressure chamber (S1), and an intermediate pressure space formed at an outside may be referred to as a second back pressure chamber (S2).
  • the back pressure chamber (S1) is a space formed by a lower surface of the frame 31 and a upper surface of the second scroll 33 around the sealing member 36, and the back pressure chamber (S1) will be described again along with the sealing member which will be described later.
  • the passage separation unit 40 is provided in the intermediate space 10a, which is a via space formed between a lower surface of the motor drive unit 20 and an upper surface of the compression unit 30, to perform the role of preventing refrigerant discharged from the compression unit 30 from interfering with oil moving from the upper space 10b of the motor drive unit 20 which is an oil separation space to the lower space 10c of the compression unit 30 which is an oil storage space.
  • the passage separation unit 40 includes a passage guide for separating the first space 10a into a space through which refrigerant flows (hereinafter, referred to as a refrigerant flow space) and a space through which oil flows (hereinafter, referred to as an oil flow space).
  • the passage guide may separate the first space 10a into the refrigerant flow space and the oil flow space by the passage guide itself, but according to circumstances, a plurality of passage guides may be combined to perform the role of a passage guide.
  • the passage separation unit includes a first passage guide 410 provided in the frame 31 and extended upward and a second passage guide 420 provided in the stator 21 and extended downward.
  • the first passage guide 410 and the second passage guide 420 may be overlapped in an axial direction to divide the intermediate space 10a into the refrigerant flow space and the oil flow space.
  • first passage guide 410 may be formed in an annular shape and fixedly coupled to an upper surface of the frame 31, and the second passage guide 420 may be inserted into the stator 21 and extended from an insulator for insulating winding coils.
  • the first passage guide 410 includes a first annular wall portion 411 extended upward from the outside, a second annular wall portion 412 extended upward from the inside, and an annular surface portion 413 extended in a radial direction to connect between the first annular wall portion 411 and the second annular wall portion 412.
  • the first annular wall portion 411 may be formed higher than the second annular wall portion 412, and a coolant through hole may be formed on the annular surface portion 413 to allow a coolant hole communicated from the compression unit 30 to the intermediate space 10a to communicate therewith.
  • a balance weight 26 is located at an inside of the second annular wall portion 412, namely, in a rotational shaft direction, and the balance weight 26 is engaged with the rotor 22 or the rotating shaft 50 to rotate. At this time, refrigerant may be stirred while the balance weight 26 rotates, but the refrigerant may be prevented from moving toward the balance weight 26 by the second annular wall portion 412 to suppress the refrigerant from being stirred by the balance weight.
  • the second flow guide 420 may include a first extension portion 421 extended downward from an outside of the insulator and a second extension portion 422 extended downward from an inside of the insulator.
  • the first extension portion 421 is formed to overlap with the first annular wall portion 411 in an axial direction to perform the role of dividing a space into the refrigerant flow space and the oil flow space.
  • the second extension portion 422 may be not formed as necessary, but may preferably be formed not to overlap with the second annular wall portion 412 in an axial direction or formed at a sufficient distance in a radial direction to sufficiently flow refrigerant even if it does not overlap therewith.
  • an upper portion of the rotating shaft 50 is press-fitted and coupled to the center of the rotor 22 while a lower portion thereof is coupled to the compression unit 30 to be supported in a radial direction.
  • the rotating shaft 50 transfers a rotational force of the motor drive unit 20 to the orbiting scroll 33 of the compression unit 30.
  • the second scroll 33 eccentrically coupled to the rotating shaft 50 performs an orbiting movement with respect to the first scroll 32.
  • a main bearing portion (hereinafter, referred to as a first bearing portion) 51 may be formed at a lower half portion of the rotating shaft 50 to be inserted into the first shaft receiving hole 312a of the frame 31 and supported in a radial direction
  • a sub-bearing portion (hereinafter, referred to as a second bearing portion) 52 may be formed at a lower side of the first bearing portion 51 to be inserted into the second shaft receiving hole 326a of the first scroll 32 and supported in a radial direction.
  • the eccentric portion 53 may be formed between the first bearing portion 51 and the second bearing portion 52 to be inserted into the rotating shaft coupling portion 333 and coupled thereto.
  • the first bearing portion 51 and the second bearing portion 52 may be coaxially formed to have the same axial center, and the eccentric portion 53 may be eccentrically formed in a radial direction with respect to the first bearing portion 51 or the second bearing portion 52.
  • the second bearing portion 52 may be eccentrically formed with respect to the first bearing portion 51.
  • the eccentric portion 53 should be formed in such a manner that its outer diameter is smaller than an outer diameter of the first bearing portion 51 and larger than an outer diameter of the second bearing portion 52 to be advantageous in coupling the rotating shaft 50 to the respective shaft receiving holes 312a, 326a through the rotating shaft coupling portion 333.
  • the rotation shaft 50 may be inserted and coupled thereto even when an outer diameter of the second bearing portion 52 is not formed to be smaller than an outer diameter of the eccentric portion 53.
  • an oil supply passage 50a for supplying oil to each bearing portion and the eccentric portion may be formed along an axial direction within the rotating shaft 50.
  • the oil supply passage 50a may be formed from a lower end of the rotating shaft 50 to substantially a lower end or a middle height of the stator 21 or a position higher than an upper end of the first bearing portion 31 by grooving as the compression unit 30 is located below the motor drive unit 20.
  • it may be formed by penetrating the rotating shaft 50 in an axial direction.
  • an oil feeder 60 for pumping oil filled in the lower space 10c may be coupled to a lower end of the rotating shaft 50, namely, a lower end of the second bearing portion 52.
  • the oil feeder 60 may include an oil supply pipe 61 inserted and coupled to the oil supply passage 50a of the rotating shaft 50 and a blocking member 62 for receiving the oil supply pipe 61 to block the intrusion of foreign matter.
  • the oil supply pipe 61 may be located to pass through the discharge cover 34 and immerse in the oil of the lower space 10c.
  • a sliding portion oil supply passage (F1) connected to the oil supply passage 50a to supply oil to each sliding portion is formed on each bearing portion 51, 52 and the eccentric portion 53 of the rotating shaft 50.
  • the sliding portion oil supply passage (F1) includes a plurality of oil supply holes 511, 521, 531 penetrated from the oil supply passage 50a toward an outer circumferential surface of the rotating shaft 50, and a plurality of oil supply grooves 512, 522, 532 communicated with the oil supply holes 511, 521, 531, respectively, to lubricate each bearing portions 51, 52 and the eccentric portion 53.
  • a first oil supply hole 511 and a first oil supply groove 512 are formed in the first bearing portion 51, and a second oil supply hole 521 and a second oil supply groove 522 are formed in the second bearing portion 52, and a third oil supply hole 531 and a third oil supply groove 532 are formed in the eccentric portion 53, respectively.
  • the first oil supply groove 512, the second oil supply groove 522, and the third oil supply groove 532 are respectively formed in an elongated manner in an axial or oblique direction.
  • first connection groove 541 and a second connection groove 541 formed in an annular shape, respectively, may be formed between the first bearing portion 51 and the eccentric portion 53 and between the eccentric portion 53 and the second bearing portion 52, respectively.
  • a lower end of the first oil supply groove 512 is communicated with the first connection groove 541, and an upper end of the second oil supply groove 522 is connected to the second connection groove 542. Accordingly, a part of oil that lubricates the first bearing portion 51 through the first oil supply groove 512 flows down to be collected into the first connection groove 541, and this oil flows into the first back pressure chamber (S1) to form a back pressure of the discharge pressure.
  • the oil that lubricates the second bearing portion 52 through the second oil supply groove 522 and the oil that lubricates the eccentric portion 53 through the third oil supply groove 532 are collected into the second connection groove 542, and introduced into the compression unit 30 through a space between a front end surface of the rotating shaft coupling portion 333 and the first plate section 321.
  • a small amount of oil sucked up in an upper direction of the first bearing portion 51 flows out of a bearing surface thereof at an upper end of the first shaft receiving portion 312 of the frame 31 and flows down to an upper surface 31a of the frame 31 along the first shaft receiving portion 312, and then is collected to the lower space 10c through the oil passages (P O1 , P O2 ) successively formed on an outer circumferential surface of the frame 31 (or a groove communicated from the upper surface to the outer circumferential surface) and an outer circumferential surface of the first scroll 32.
  • oil discharged from the compression chamber (V) to the upper space 10b of the casing 10 together with refrigerant is separated from refrigerant in the upper space 10b of the casing 10 and collected into the lower space 10c through the first oil passage (P O1 ) formed on an outer circumferential surface of the motor drive unit 20 and the second oil passage (P O2 ) formed on an outer circumferential surface of the compression unit 30.
  • a passage separation unit 40 is provided between the drive unit 20 and the compression unit 30 to allow oil to move to the lower space 10c and allow refrigerant to move to the upper space 10b, respectively, through different passages (P O1 , P O2 ) (P G1 , P G2 ) in such a manner that oil separated from refrigerant in the upper space 10b and moved to the lower space 10c is not interfered and remixed with refrigerant discharged from the compression unit 20 and moved to the upper space 10b.
  • the second scroll 33 is formed with a compression chamber oil supply passage (F2) for supplying oil sucked up through the oil supply passage 50a to the compression chamber (V).
  • the compression chamber oil supply passage (F2) is connected to the above-described sliding portion oil supply passage (F1).
  • the compression chamber oil supply passage (F2) may include a first oil supply passage 371 communicating between the oil supply passage 50a and the second back pressure chamber (S2) constituting an intermediate pressure space, and a second oil supply passage 372 communicating with the intermediate pressure chamber of the compression chamber (V).
  • the compression chamber oil supply passage may be formed to communicate directly from the oil supply passage 50a to the intermediate pressure chamber without passing through the second back pressure chamber (S2).
  • a refrigerant passage for communicating the second back pressure chamber (S2) with the intermediate pressure chamber (V) should be separately provided, and an oil passage for supplying oil to the oldham ring 35 located in the second back pressure chamber (S2) should be separately provided. Due to this, a number of passages may increase to complicate processing.
  • the oil supply passage 50a is communicated with the second back pressure chamber (S2) and the second back pressure chamber (S2) is communicated with the intermediate pressure chamber (V).
  • the first oil supply passage 371 is formed with a first orbiting passage portion 371a formed from a lower surface of the second plate portion 331 to the middle in a thickness direction, and a second orbiting passage portion 371b is formed from the first orbiting passage portion 371a to an outer circumferential surface of the second plate portion 331, and a third orbiting passage portion 371c penetrated from the second orbiting passage portion 371b to an upper surface of the second plate portion 331.
  • the first orbital passage portion 371a is formed at a position belonging to the first back pressure chamber (S1)
  • the third orbital passage portion 371c is formed at a position belonging to the second back pressure chamber (S2).
  • a pressure reducing rod 375 is inserted into the second orbital passage portion 371b to reduce a pressure of oil moving from the first back pressure chamber (S1) to the second back pressure chamber (S2) through the first oil supply passage 371.
  • a cross-sectional area of the second orbital passage portion 371b excluding the pressure reducing rod 375 is formed to be smaller than that of the first orbital passage portion 371a or the third orbital passage portion 371c.
  • a fourth orbital passage portion 371d may be formed from an end portion of the third orbital passage portion 371c toward an outer circumferential surface of the second plate portion 331.
  • the fourth orbital passage portion 371d may be formed as a groove on an upper surface of the second plate portion 331 or may be formed as a hole within the second plate portion 331 as illustrated in FIG. 4 .
  • the second oil supply passage 372 is formed with a first fixed passage portion 372a in a thickness direction on an upper surface of the second sidewall portion 322, and formed with a second fixed passage portion 372b in a radial direction from the first fixed passage portion 372a, and formed with a third fixed passage portion 372c communicating from the second fixed passage portion 372b to the intermediate pressure chamber (V).
  • reference numeral 70 is an accumulator.
  • a lower compression type scroll compressor according to the present embodiment operates as follows.
  • refrigerant supplied from an outside of the casing 10 through the refrigerant suction pipe 15 is introduced into the compression chamber (V), and compressed and discharged to an inner space of the discharge cover 34 through the discharge port 325a, 325b as a volume of the compression chamber (V) is reduced by the orbiting movement of the orbiting scroll 33.
  • refrigerant discharged to the inner space of the discharge cover 34 is circulated into an inner space of the discharge cover 34 and moved to a space between the frame 31 and the stator 21 after noise is reduced, and the refrigerant is moved to an upper space of the motor drive unit 20 through a gap between the stator 21 and the rotor 22.
  • oil that lubricates the first bearing portion 51 through the first oil supply hole 511 and the first oil supply groove 512 is collected into the first connection groove 51 between the first bearing portion 51 and the eccentric portion 53, and this oil flows into the first back pressure chamber (S1).
  • This oil forms a substantial discharge pressure
  • a pressure of the first back pressure chamber (S1) also forms a substantial discharge pressure. Therefore, the center portion side of the second scroll 33 may be supported in an axial direction by the discharge pressure.
  • the oil of the first back pressure chamber (S1) is moved to the second back pressure chamber (S2) through the first oil supply passage 371 by a pressure difference from the second back pressure chamber (S2).
  • a pressure reducing rod 375 is provided in the second orbiting passage portion 371b constituting the first oil supply passage 371, and thus an oil pressure toward the second back pressure chamber (S2) is reduced to an intermediate pressure.
  • oil moving to the second back pressure chamber (intermediate pressure space) (S2) supports an edge portion of the second scroll 33 while at the same time moving to the intermediate pressure chamber (V) through the second oil supply passage 372 according to a pressure difference from the intermediate pressure chamber (V).
  • a pressure of the intermediate pressure chamber (V) becomes higher than that of the second back pressure chamber (S2) during the operation of the compressor, refrigerant moves from the intermediate pressure chamber (V) to the second back pressure chamber (S2) through the second oil supply passage 372.
  • the second oil supply passage 372 performs the role of a passage through which the refrigerant and the oil alternatively move according to a difference between a pressure of the second back pressure chamber (S2) and a pressure of the intermediate pressure chamber (V).
  • the scroll compressor may form bypass holes in the middle of each compression chamber to bypass liquid refrigerant in advance or bypass a part of gas refrigerant to be compressed, thereby preventing the over compression from occurring.
  • a compression path of the first compression chamber is formed to be relatively larger than that of the second compression chamber. Accordingly, in the second compression chamber having a relatively smaller compression path, a flow rate of refrigerant may increase, thereby generating larger over compression than in the first compression chamber.
  • the sizes and positions of bypass holes formed in the first compression chamber and the second compression chamber, respectively are symmetrically formed, and thus there is a limitation in effectively reducing over-compression loss.
  • the sizes and positions of bypass holes formed in the first compression chamber and the second compression chamber may be formed differently according to a compression gradient of each compression chamber to effectively reduce over-compression loss in a compression chamber having a larger compression gradient, thereby enhancing the efficiency of the compressor.
  • FIG. 5 is a schematic view illustrating a volume diagram for a first compression chamber and a second compression chamber in a typical axial through scroll compressor.
  • a volume of the first compression chamber (V1) is gradually reduced from a compression start angle to a discharge complete angle
  • a volume of the second compression chamber (V2) is gradually reduced from a compression start angle to an approximate discharge start time similarly to a gradient of the first compression chamber (V1), but drastically reduced with a larger gradient than that of the first compression chamber (V1) from the an approximate discharge start angle to the discharge complete angle.
  • a volume of the second compression chamber (V2) is smaller than that of the first compression chamber (V1) but reduced with a larger gradient from the vicinity of the approximate discharge start angle. Accordingly, it may be seen that a pressure inversely proportional to a volume may be drastically increased in the second compression chamber (V2) as compared to the first compression chamber (V1), and larger over-compression loss may occur in the second compression chamber (V2) as compared to the first compression chamber (V1).
  • a Plurality of bypass holes is formed along the respective paths of the first compression chamber (V1) and the second compression chamber (V2), and an overall cross-sectional area of the plurality of second bypass holes belonging to the second compression chamber (V2) is formed to be larger than that of the plurality of first bypass holes belonging to the first compression chamber (V1) in a range from a specific angle ( ⁇ ) at which the foregoing discharge start angle or volume is drastically reduced to increase the compression gradient up to a discharge complete angle.
  • an inner diameter of the bypass hole belonging to the second compression chamber (V2) may be formed to be larger or a number of the bypass hole may be increased as compared to that of the bypass hole belonging to the first compression chamber (V1).
  • first bypass hole and the second bypass hole may be formed in substantially the same size at substantially the same angle (or number) along the respective compression paths of the first compression chamber (V1) and the second compression chamber (V2) from a suction complete angle to the foregoing specific angle ( ⁇ ).
  • a second bypass hole (it may be referred to as a "group” or “bypass portion") of the second compression chamber (V2) may be located subsequent to the foregoing specific angle ( ⁇ ) with respect to a suction end which is an outer end of the first wrap.
  • the second bypass hole may be formed to have a larger cross-sectional area than the first bypass hole in a range from the specific angle ( ⁇ ) to the discharge complete angle.
  • an overall cross-sectional area of the first bypass hole and an overall cross-sectional area of the second bypass hole are formed to be the same, but as described above, the overall cross-sectional area of the first bypass hole is formed larger than that of the second bypass hole in a range from the suction complete angle to the specific angle ( ⁇ ). Accordingly, in a range from the specific angle ( ⁇ ) to the discharge complete angle, an overall cross-sectional area of the second bypass hole may be formed to be larger than that of the first bypass hole in an opposite manner to the range described above.
  • FIG. 6 is a plan view illustrating an embodiment of a first scroll to which the bypass hole according to the present embodiment is applied.
  • bypass holes may be formed at three points at intervals of an arbitrary rotation angle along the compression path of each of the compression chambers (V1, V2), and three holes 381a, 381b, 381c, 382a, 382b, 382c may be formed at each point, and thus total nine bypass holes may be formed in the first compression chamber (V1) and the second compression chamber (V2), respectively.
  • bypass holes 381a, 381b, 381c formed at each point may be referred to as a bypass hole group, and when bypass holes groups located away from a bypass hole group close to each discharge port 325a, 325b around the each discharge port 325a, 325b are referred to as a first group (BP11) of the first compression chamber, a first group (BP21) of the second compression chamber, a second group (BP12) of the first compression chamber and a second group (BP22) of the second compression chamber, and a third group (BP13) of the first compression chamber and a third group (BP23) of the second compression chamber, respectively, and a rotation angular interval between the first groups (BP11, BP21) and the second groups (BP12, BP22) is defined as a first inner interval (G11) and a first outer interval (G21) and a rotation angular interval between the second groups (BP12, BP 22) and the third groups (BP13, BP23) is defined as a second inner interval
  • first bypass holes 381a, 381b, 381c only the first group (BP11) may correspond to bypass holes for discharge, and the second group (BP12) and the third group (BP13) may correspond to bypass holes for discharging liquid refrigerant.
  • the first group (BP21) and the second group (BP22) may correspond to bypass holes for discharge, and only the third group (BP23) may correspond to the bypass holes for discharging liquid refrigerant.
  • an overall cross-sectional area of the second bypass hole (or the second bypass hole group) may be formed to be larger in a range from the foregoing specific angle ( ⁇ ) to the discharge complete angle (0°), thereby effectively reducing over-compression loss occurring in a relatively large scale in the second compression chamber (V2).
  • FIGS. 7A and 7B are compression diagrams in which a pressure change for the second compression chamber in a lower compression scroll compressor provided with a bypass hole illustrated in FIG. 6 is compared with the related art, wherein FIG. 7A and FIG. 7B illustrate the related art and the present embodiment, respectively.
  • over-compression loss in the second compression chamber (V2) may be significantly reduced as illustrated in FIG. 7B while over-compressed refrigerant is bypassed in a short period of time.
  • an overall cross-sectional area of the second bypass hole belonging to the second compression chamber (V2) having a large compression gradient between the first compression chamber (V1) and the second compression chamber (V2) may be formed to be larger that of the first bypass hole belonging to the first compression chamber (V1) having a smaller compression gradient, thereby preventing over compression in the second compression chamber (V2) to enhance the overall efficiency of the compressor.
  • bypass holes may be formed in the same manner as in the above-described embodiment, but a size or number of bypass holes may be formed differently, thereby effectively reducing the over-compression loss for the second compression chamber having a large compression gradient.
  • FIGS. 8 through 11 are views illustrating those embodiments.
  • a size (d2) of each second bypass hole belonging to the first group (or first bypass portion) 382c adjacent to adjacent to the second compression chamber side discharge port (hereinafter, referred to as a second discharge port) 325b and/or the second group (or second bypass passage) 382b among the second bypass holes 382a, 382b, 382c may be formed to be larger than a size (d1) of each first bypass hole belonging to the first group (or the first bypass portion) 381c adjacent to the first compression chamber side discharge port (hereinafter, referred to as a first discharge port) 325a among the first bypass holes 381a, 381b, 381c.
  • an overall cross-sectional area of the second passage holes 382a, 382b, 382c belonging to the second compression chamber (V2) is formed to be larger than that of the first bypass holes 381a, 381b, 381c belonging to the first compression chamber (V1), and thus even if a compression gradient of the second compression chamber (V2) is relatively larger than that of the first compression chamber (V1), an amount of refrigerant bypassed in the second compression chamber (V2) becomes larger than that bypassed in the first compression chamber (V1).
  • over-compression loss in the second compression chamber having a relatively larger compression loss may be effectively reduced to enhance the overall efficiency of the compressor.
  • a number of the bypass holes 382b, 382c belonging to the first group and/or the second group among the second bypass holes within a range from the foregoing specific angle ( ⁇ ) to the discharge complete angle may be formed to be larger than that of the bypass holes 381c belonging to the first group among the first bypass holes.
  • a size of the first bypass hole 381c and a size of the second bypass hole 382b, 382c may be the same, but as in the above embodiment of FIG. 8 , a size (d2) of the second bypass hole 382b, 382c may be formed to be larger than a size (d1) of the first bypass hole 381c.
  • the size (d1) of the first bypass hole 381c may be formed to be larger than the size (d2) of the second bypass hole 382b 382c, but in this case, an overall cross-sectional area of the second bypass hole 382b, 382c should be formed to be larger than that of the first bypass hole 381c to reduce over-compression loss in the second compression chamber (V2).
  • an effect of reducing over-compression loss in the second compression chamber (V2) while forming an overall cross-sectional area of the second bypass holes 382b, 382c to be larger than that of the first bypass hole 381a is the same as in the above-described embodiments.
  • an overall cross-sectional area of the second bypass hole may be increased while appropriately maintaining a size of the bypass hole, namely, not to be larger than a thickness of the wrap, and thus the present embodiment may be advantageous in terms of processing as compared to the embodiment of FIG. 8 .
  • first bypass hole 381c and two second bypass holes 382b, 382c are formed within the above range as illustrated in FIG. 10
  • a number of bypass holes in the first compression chamber (V1) and the second compression chamber (V2) may be formed to be different from each other.
  • the present embodiment may form three bypass holes in a long hole shape by connecting three or more bypass holes to one another instead of successively forming the three bypass holes at regular intervals.
  • it may be possible to form a larger bypass hole in the same area to prevent over compression loss and reduce a passage resistance at the discharge port, thereby further increasing compression efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Claims (12)

  1. Compresseur à spirales, comprenant :
    un carter (10) définissant un espace intérieur ;
    un moteur d'entraînement (20) prévu dans l'espace intérieur du carter ;
    un arbre rotatif (50) raccordé au moteur d'entraînement ;
    un châssis (31) prévu sur un coté du moteur d'entraînement ;
    une première spirale (32) prévue sur un côté du châssis, ladite première spirale présentant une première partie de plaque (321) et une première volute (323) formée sur une surface latérale de la première partie de plaque, un orifice de refoulement (325) prévu adjacent à une partie d'extrémité latérale centrale de la première volute, et une pluralité de premiers trous de dérivation (381) et une pluralité de deuxièmes trous de dérivation (382) formés respectivement autour d'une surface intérieure de la première volute et autour d'une surface extérieure de la première volute, la pluralité de premiers trous de dérivation et la pluralité de deuxièmes trous de dérivation étant formées à intervalles dans la direction de formation de la première volute ; et
    une deuxième spirale (33) prévue entre le châssis et la première spirale, ladite deuxième spirale présentant une deuxième partie de plaque (331) et une deuxième volute (332) en contact avec la première volute et formée sur une surface latérale de la deuxième partie de plaque, l'arbre rotatif étant raccordé excentriquement à la deuxième volute pour chevaucher la deuxième volute dans la direction radiale ;
    où une paire de chambres de compression comprenant une première chambre de compression (V1) et une deuxième chambre de compression (V2) est formée entre la deuxième spirale et la première spirale, la deuxième spirale effectuant un déplacement orbital par rapport à la première spirale, la pluralité de premiers trous de dérivation (381) et la pluralité de deuxièmes trous de dérivation (382) communiquant respectivement avec la première chambre de compression (V1) et la deuxième chambre de compression (V2), et un gradient de compression de la deuxième chambre de compression (V2) étant supérieur à celui de la première chambre de compression (V1),
    où la surface de section transversale totale de la pluralité de deuxièmes trous de dérivation est supérieure à la surface de section transversale totale de la pluralité de premiers trous de dérivation dans une plage d'angle de rotation de 180 degrés le long de la première volute depuis une extrémité intérieure de la première volute par rapport au centre axial (O) de l'arbre rotatif,
    caractérisé en ce que, lorsque la pluralité de premiers trous de dérivation (381) correspond à plusieurs trous de dérivation définis en tant que premières parties de dérivation (381a, 381b, 381c) et la pluralité de deuxièmes trous de dérivation (382) correspond à plusieurs trous de dérivation définis en tant que deuxièmes parties de dérivation (382a, 382b, 382c), un intervalle entre une partie de dérivation (381c) la plus proche de l'orifice de refoulement et une partie de dérivation (381b) voisine, adjacente à la partie de dérivation (381c) parmi les premières parties de dérivation est défini en tant que premier intervalle intérieur (G11), et un intervalle entre une partie de dérivation (382c) la plus proche de l'orifice de refoulement et une partie de dérivation (382b) voisine, adjacente à la partie de dérivation (382c) parmi les deuxièmes parties de dérivation (382a, 382b, 382c) est défini en tant que premier intervalle extérieur (G21),
    le premier intervalle extérieur (G21) étant prévu inférieur au premier intervalle intérieur (G11).
  2. Compresseur à spirales selon la revendication 1, où la surface de section transversale totale de la pluralité de premiers trous de dérivation est prévue identique à celle de la pluralité de deuxièmes trous de dérivation sur toute la plage d'un angle de rotation le long de la première volute par rapport au centre axial (O) de l'arbre rotatif.
  3. Compresseur à spirales selon la revendication 1, où la surface de section transversale totale de la pluralité de deuxièmes trous de dérivation est prévue supérieure à la surface de section transversale totale de la pluralité de premiers trous de dérivation sur toute la plage d'un angle de rotation le long de la première volute par rapport au centre axial (O) de l'arbre rotatif.
  4. Compresseur à spirales selon la revendication 1, la revendication 2 ou la revendication 3, où la pluralité de premiers trous de dérivation est égale en nombre à la pluralité de deuxièmes trous de dérivation.
  5. Compresseur à spirales selon la revendication 1, la revendication 2 ou la revendication 3, où la pluralité de deuxièmes trous de dérivation est prévue supérieure en nombre à la pluralité de premiers trous de dérivation à l'intérieur de la plage.
  6. Compresseur à spirales selon l'une des revendications 1 à 5, où l'orifice de refoulement comprend :
    un premier orifice de refoulement (325a) communiquant avec la première chambre de compression ; et
    un deuxième orifice de refoulement (325b) communiquant avec la deuxième chambre de compression.
  7. Compresseur à spirales selon la revendication 6, où au moins deux trous de dérivation prévus adjacents et successifs constituent chaque partie de dérivation, et
    où chaque partie de dérivation a un nombre identique de trous de dérivation.
  8. Compresseur à spirales selon la revendication 6, où au moins deux trous de dérivation prévus adjacents et successifs constituent chaque partie de dérivation, et
    où chaque partie de dérivation a une surface de section transversale de trous de dérivation identique.
  9. Compresseur à spirales selon la revendication 6, où les trous de dérivation correspondant audit au moins un deuxième trou de dérivation sont prévus en nombre supérieur aux trous de dérivation correspondant audit au moins un premier trou de dérivation.
  10. Compresseur à spirales selon la revendication 7, où la surface de section transversale totale des trous de dérivation correspondant audit au moins un deuxième trou de dérivation est prévue supérieure à celles des trous de dérivation correspondant audit au moins un premier trou de dérivation.
  11. Compresseur à spirales selon l'une des revendications précédentes, où le châssis est disposé sous le moteur d'entraînement, et la première spirale est disposée sous le châssis.
  12. Compresseur à spirales selon la revendication 1, où le châssis (31) présente un premier trou de réception d'arbre (312a) formé dans la direction axiale, la deuxième spirale (33) présente une partie de raccordement (333) d'arbre rotatif formée à une partie d'extrémité intérieure de la deuxième volute (332) dans la direction axiale, et la première spirale (32) présente un deuxième trou de réception d'arbre (326a) formé dans la direction axiale.
EP18171091.4A 2017-06-14 2018-05-07 Compresseur à spirales Active EP3415765B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020170074856A KR102379671B1 (ko) 2017-06-14 2017-06-14 스크롤 압축기

Publications (2)

Publication Number Publication Date
EP3415765A1 EP3415765A1 (fr) 2018-12-19
EP3415765B1 true EP3415765B1 (fr) 2021-04-14

Family

ID=62134126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18171091.4A Active EP3415765B1 (fr) 2017-06-14 2018-05-07 Compresseur à spirales

Country Status (4)

Country Link
EP (1) EP3415765B1 (fr)
KR (1) KR102379671B1 (fr)
CN (1) CN110741163B (fr)
WO (1) WO2018230827A1 (fr)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY119499A (en) * 1995-12-05 2005-06-30 Matsushita Electric Ind Co Ltd Scroll compressor having bypass valves
JPH09217690A (ja) * 1996-02-14 1997-08-19 Matsushita Electric Ind Co Ltd スクロール気体圧縮機
JP3591101B2 (ja) * 1995-12-19 2004-11-17 ダイキン工業株式会社 スクロール形流体機械
JP3942784B2 (ja) * 2000-01-17 2007-07-11 松下電器産業株式会社 スクロール圧縮機
US7278832B2 (en) * 2004-01-07 2007-10-09 Carrier Corporation Scroll compressor with enlarged vapor injection port area
EP2307728B1 (fr) * 2008-05-30 2016-08-10 Emerson Climate Technologies, Inc. Compresseur possédant un ensemble de réglage de sortie avec actionnement des pistons
US7976296B2 (en) * 2008-12-03 2011-07-12 Emerson Climate Technologies, Inc. Scroll compressor having capacity modulation system
KR101056882B1 (ko) * 2009-01-07 2011-08-12 엘지전자 주식회사 스크롤 압축기
JP5621461B2 (ja) * 2009-10-14 2014-11-12 パナソニック株式会社 スクロール圧縮機
JP5396235B2 (ja) * 2009-10-26 2014-01-22 日立アプライアンス株式会社 スクロール圧縮機
GB2503718B (en) * 2012-07-05 2014-06-18 Edwards Ltd Scroll pump
KR102056371B1 (ko) * 2013-05-21 2019-12-16 엘지전자 주식회사 스크롤 압축기
KR102241201B1 (ko) * 2014-08-13 2021-04-16 엘지전자 주식회사 스크롤 압축기

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
KR20180136210A (ko) 2018-12-24
CN110741163B (zh) 2022-04-26
WO2018230827A1 (fr) 2018-12-20
CN110741163A (zh) 2020-01-31
KR102379671B1 (ko) 2022-03-28
EP3415765A1 (fr) 2018-12-19

Similar Documents

Publication Publication Date Title
US10132314B2 (en) Scroll compressor
US11739752B2 (en) Scroll compressor with bypass portions
KR102365394B1 (ko) 스크롤 압축기
US10815994B2 (en) Mutual rotating scroll compressor
KR102245438B1 (ko) 스크롤 압축기
KR102338126B1 (ko) 스크롤 압축기
EP3553318B1 (fr) Compresseur à spirales
CN107313930B (zh) 涡旋式压缩机
KR20090043989A (ko) 스크롤 압축기
US11015596B2 (en) Scroll compressor sealing
WO2015194119A1 (fr) Compresseur à spirales
EP3415765B1 (fr) Compresseur à spirales
KR102318124B1 (ko) 스크롤 압축기
JP4512479B2 (ja) スクロール圧縮機
KR102303544B1 (ko) 스크롤 압축기
KR102338129B1 (ko) 스크롤 압축기
CN219795558U (zh) 涡旋式压缩机
EP4321756A1 (fr) Compresseur à spirales
KR102492951B1 (ko) 올담링을 구비한 압축기
KR102330187B1 (ko) 스파이럴 오일 그루브 구조가 구비된 압축기

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

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

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20180607

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20201123

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602018015404

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1382617

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210515

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1382617

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210414

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20210414

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

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210714

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

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

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210715

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210814

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210816

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210714

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602018015404

Country of ref document: DE

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: CH

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

Effective date: 20210531

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: LU

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

Effective date: 20210507

Ref country code: LI

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

Effective date: 20210531

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210531

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed

Effective date: 20220117

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

Ref country code: IE

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

Effective date: 20210507

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

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210814

Ref country code: FR

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

Effective date: 20210614

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

Ref country code: BE

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

Effective date: 20210531

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

Effective date: 20220507

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

Ref country code: GB

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

Effective date: 20220507

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

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414

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

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20180507

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

Ref country code: DE

Payment date: 20230405

Year of fee payment: 6

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

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210414