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EP3597923B1 - Rotary compressor - Google Patents

Rotary compressor Download PDF

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Publication number
EP3597923B1
EP3597923B1 EP18767860.2A EP18767860A EP3597923B1 EP 3597923 B1 EP3597923 B1 EP 3597923B1 EP 18767860 A EP18767860 A EP 18767860A EP 3597923 B1 EP3597923 B1 EP 3597923B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
passage
suction
compression chamber
suction passage
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
EP18767860.2A
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German (de)
English (en)
French (fr)
Other versions
EP3597923A4 (en
EP3597923A1 (en
Inventor
Takeo Hayashi
Chihiro ENDOU
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of EP3597923A1 publication Critical patent/EP3597923A1/en
Publication of EP3597923A4 publication Critical patent/EP3597923A4/en
Application granted granted Critical
Publication of EP3597923B1 publication Critical patent/EP3597923B1/en
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    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/102—Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure
    • 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
    • F04C18/32—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 both the movement defined in group F04C18/02 and relative reciprocation between the co-operating 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
    • 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
    • F04C2240/80—Other components
    • F04C2240/806—Pipes for fluids; Fittings therefor
    • 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
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet
    • F04C2250/101—Geometry of the inlet or outlet of the inlet
    • 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
    • F04C2250/00—Geometry
    • F04C2250/20—Geometry of the rotor
    • 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
    • F04C2250/00—Geometry
    • F04C2250/30—Geometry of the stator
    • 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
    • F04C2270/17—Tolerance; Play; Gap

Definitions

  • the present invention relates to a rotary compressor used for an air conditioner, for example.
  • Japanese Unexamined Patent Publication No. 2016-118142 discloses a 2-cylinder rotary compressor which includes an upper cylinder and a lower cylinder and is configured to compress refrigerant in a compression chamber formed in each of the cylinders.
  • An accumulator is attached adjacent to the compressor.
  • the accumulator is connected to two suction pipes. One of the two suction pipes is connected to the upper cylinder whereas the other one of the suction pipes is connected to the lower cylinder.
  • the refrigerant is supplied from the accumulator through the respective suction pipes.
  • a piston having a roller is provided in the compression chamber formed in each of the upper cylinder and the lower cylinder.
  • the compression chamber is divided by the piston into a low-pressure chamber into which the refrigerant is introduced and a high-pressure chamber in which the refrigerant is compressed.
  • an external device such as an accumulator for supplying refrigerant is preferably downsized, too. It is, however, difficult to downsize the accumulator when two suction pipes are connected to the accumulator.
  • the accumulator may be downsized by connecting the 2-cylinder rotary compressor to the accumulator by a single suction pipe. This arrangement, however, is disadvantageous in that suction resistance may be increased by the branching of the suction pipe, and hence the compressor efficiency may be deteriorated.
  • An object of the present invention is to provide a rotary compressor which can be downsized and is able to suppress the deterioration of compressor efficiency.
  • a rotary compressor of the present invention is a rotary compressor comprising a compression mechanism and a driving mechanism including a drive shaft driving the compression mechanism, the compression mechanism and a driving mechanism being housed in the rotary compressor.
  • the compression mechanism includes: a plurality of cylinders in which compression chambers are formed, respectively, the cylinders being aligned in the axial direction of the drive shaft so that the drive shaft is inside the compression chambers; a plurality of end plates provided at both ends of the cylinders in the axial direction to define the compression chambers; and a plurality of pistons provided in the respective compression chambers and driven by the drive shaft.
  • the cylinders includes a first cylinder and a second cylinder adjacent to the first cylinder via one of the end plates.
  • a suction passage including a first passage and a second passage branched from the first passage is formed in the rotary compressor, the first passage supplies the compression chamber of the first cylinder with refrigerant from an external device via a suction pipe, and the second passage supplies the compression chamber of the second cylinder with the refrigerant.
  • the surface area of a region facing the suction passage in the second cylinder is smaller than the surface area of a region facing the suction passage in the first cylinder.
  • a difference between the height of the second cylinder in the axial direction and the height in the axial direction of the piston provided in the compression chamber of the second cylinder is smaller than a difference between the height of the first cylinder in the axial direction and the height in the axial direction of the piston provided in the compression chamber of the first cylinder.
  • the external device may be an accumulator or a device which is provided between an accumulator and the rotary compressor of the present invention.
  • the first passage may be arranged so that the first passage passes through the first cylinder but does not pass through the second cylinder, and the second passage is branched from the first passage may be the first cylinder and may pass through both the first cylinder and the second cylinder.
  • the first cylinder may be configured to be inserted by the suction pipe so that a leading end of the suction pipe is in the first cylinder.
  • an end plate arranged on the opposite side of the second cylinder with respect to the first cylinder may be configured to be inserted by the suction pipe so that a leading end of the suction pipe is in the end plate.
  • a difference between the height of the cylinder in the axial direction and the height in the axial direction of the piston provided in the compression chamber of the cylinder decreases as the surface area of a region facing the suction passage in the cylinder decreases.
  • a relation 3.9 ⁇ 0.0001 ⁇ (Hc-Hp)/Hc-1.4 ⁇ 0.0001 ⁇ As/(Hc ⁇ Ls) ⁇ 6.7 ⁇ 0.0001 is satisfied where the height of the cylinder in the axial direction is denoted as He (mm), the height in the axial direction of the piston provided in the compression chamber in the cylinder is denoted as Hp (mm), the surface area of a region facing the suction passage in the cylinder is denoted as As (mm 2 ), and the length of the suction passage in the cylinder in a direction orthogonal to the axial direction is denoted as Ls (mm).
  • a suction passage is formed in the rotary compressor of the present invention, and the suction passage includes a first passage through which refrigerant is supplied to the compression chamber of the first cylinder and a second passage which is branched from the first passage and through which the refrigerant is supplied to the compression chamber of the second cylinder.
  • the surface area of a region facing the suction passage in the second cylinder is smaller than the surface area of a region facing the suction passage in the first cylinder. For this reason, as compared to the first cylinder, the decrease in temperature of the refrigerant at around the region facing the suction passage in the cylinder is small in the second cylinder.
  • the difference between the height of the cylinder and the height of the piston i.e., the gap between the end face of the piston in the axial direction and the end face of the end plate in the axial direction
  • the difference between the height of the cylinder and the height of the piston is arranged to be small in the second cylinder as compared to the first cylinder, with the result that oil leakage from the inner periphery of the piston to the compression chamber is suppressed, and the volume efficiency and the indicated efficiency are thereby improved for the second cylinder.
  • the compressor 1 of the present embodiment is a 2-cylinder rotary compressor which includes a closed container 2 and further includes a driving mechanism 3 and a compression mechanism 4 which are housed in the closed container 2.
  • the closed container 2 is a cylindrical container which is closed at both upper and lower ends.
  • An accumulator 5 is attached adjacent to the closed container 2.
  • the accumulator 5 is connected to the compression mechanism 4 by a single suction pipe 6 through which refrigerant is introduced.
  • An outlet tube 7 is provided at an upper part of the closed container 2 to discharge the refrigerant compressed by the compression mechanism 4. Lubricating oil is stored at a bottom portion of the closed container 2.
  • the compressor 1 is, for example, incorporated in a refrigerating cycle in an air conditioner, and is configured to compress refrigerant supplied from the suction pipe 6 and discharge the refrigerant from the outlet tube 7.
  • the refrigerant used in the compressor 1 is, for example, R32 or R410A.
  • the compressor 1 is oriented as shown in FIG. 1 , i.e., is oriented such that the axial direction (which is identical with the axial direction of a later-described drive shaft 3b) of the compressor 1 is parallel to the up-down direction.
  • the driving mechanism 3 is provided to drive the compression mechanism 4, and is constituted by a motor 3a which is a driving source and the drive shaft 3b attached to the motor 3a.
  • the motor 3a includes a substantially annular stator 3aa fixed to the inner circumferential surface of the closed container 2 and a substantially annular rotor 3ab provided radially inside the stator 3aa with an air gap being formed between the stator and the rotor.
  • the rotor 3ab includes a magnet (not shown) whereas the stator 3aa includes a coil (not shown).
  • the drive shaft 3b is fixed to the inner circumferential surface of the rotor 3ab, and rotates on its axis together with the rotor 3ab so as to drive the compression mechanism 4.
  • the drive shaft 3b has eccentric portions 3c and 3d which are in a later-described compression chamber 31 and in a later-described compression chamber 51, respectively (see FIG. 2A, FIG. 2B , and FIG. 3 ).
  • Each of the eccentric portions 3c and 3d is cylindrical in shape, and has a central axis which is eccentric from the rotation center of the drive shaft 3b.
  • pistons 32 and 52 of the compression mechanism 4 are attached, respectively.
  • an oil supply passage (not shown) is formed inside a substantially lower half of the drive shaft 3b.
  • the oil supply passage extends along the up-down direction and is branched at several parts in radial directions of the drive shaft 3b.
  • a helical-blade-shaped pump member (not shown) is attached to the lower end of the drive shaft 3b to suck the lubricating oil into the oil supply passage in accordance with the rotation of the drive shaft 3b.
  • the lubricating oil sucked from the lower end of the drive shaft 3b by the pump member is discharged from a side face of the drive shaft 3b and is supplied to slide members of the compression mechanism 4, such as the compression chambers 31 and 51, for example.
  • the compression mechanism 4 includes upper mufflers 10a and 10b, an upper head 20 (end plate), an upper cylinder 30 (cylinder), a middle plate 40 (end plate ), a lower cylinder 50 (cylinder), a lower head 60 (end plate), and a lower muffler 70. These members are provided in this order from top to bottom, along the axial direction of the drive shaft 3b.
  • the upper cylinder 30 is a substantially circular plate.
  • the compression chamber 31 is formed as a circular hole penetrating the upper cylinder 30 in the axial direction of the drive shaft 3b.
  • the piston 32 is provided in the compression chamber 31.
  • the piston 32 is constituted by an annular roller 32a and a blade 32b which extends radially outward from the outer circumferential surface of the roller 32a.
  • the roller 32a is attached to be rotatable relative to the outer circumferential surface of the eccentric portion 3c and is provided in the compression chamber 31.
  • a lateral passage 30a which extends in the radial direction of the upper cylinder 30 is formed as a suction passage for introducing refrigerant into the compression chamber 31.
  • a radially inner end portion of the lateral passage 30a is open at the compression chamber 31, whereas a radially outer end portion of the lateral passage 30a is open at the outer circumferential surface of the upper cylinder 30.
  • the suction pipe 6 is inserted into the lateral passage 30a from the radially outer end portion of the lateral passage 30a, and a leading end of the suction pipe 6 is at around the center of the lateral passage 30a.
  • a vertical passage 30b which extends vertically downward from the lateral passage 30a is formed as a suction passage for introducing refrigerant into the compression chamber 51.
  • the vertical passage 30b is branched from a part of the lateral passage 30a, which is between the radially inner end portion of the lateral passage 30a and the leading end of the suction pipe 6.
  • the vertical passage 30b extends vertically downward and is open at the bottom surface of the upper cylinder 30.
  • a blade accommodation portion 33 is formed in the upper cylinder 30.
  • This portion 33 is a recess formed radially outward from the circumferential wall surface of the compression chamber 31.
  • a pair of bushes 34 are housed in the blade accommodation portion 33 to oppose each other in the circumferential direction of the upper cylinder 30.
  • Each bush 34 is a half of a substantially cylindrical member.
  • the pair of bushes 34 are swingable in the blade accommodation portion 33 while the blade 32b is provided between them. Between the pair of bushes 34, the blade 32b is movable in the radial direction of the upper cylinder 30.
  • the compression chamber 31 is divided into a low-pressure chamber and a high-pressure chamber by the blade 32b.
  • the upper head 20 is provided to be in contact with the upper end face of the upper cylinder 30.
  • the compression chamber 31 is defined on account of the closure of the upper end of the compression chamber 31 by the upper head 20.
  • the upper head 20 is substantially annular in shape, and the drive shaft 3b is rotatably inserted at a central portion of the upper head 20.
  • the upper head 20 is fixed to the inner circumferential surface of the closed container 2 by welding, for example.
  • the upper mufflers 10a and 10b are provided above the upper head 20. Between the upper head 20 and the upper muffler 10b and between the upper muffler 10a and the upper muffler 10b, an upper muffler space is formed. This upper muffler space is provided for the purpose of reducing noise due to the discharge of the refrigerant.
  • a discharge hole 35 is formed in the upper head 20 to cause the compression chamber 31 to communicate with the upper muffler space so that the refrigerant compressed in the compression chamber 31 is discharged to the upper muffler space.
  • the discharge hole 35 is closed by a plate-shaped discharge valve (not shown) .
  • the discharge valve is elastically deformed when the pressure in the compression chamber 31 becomes equal to or higher than a predetermined pressure, with the result that the discharge hole 35 is opened.
  • the middle plate 40 is a circular plate and is provided to be in contact with the lower end face of the upper cylinder 30 and the upper end face of the lower cylinder 50 as shown in FIG. 1 . As shown in FIG. 3 , the middle plate 40 closes the lower end of the compression chamber 31 of the upper cylinder 30 to define the compression chamber 31 and closes the upper end of the compression chamber 51 of the lower cylinder 50 to define the compression chamber 51.
  • a vertical passage 40a connected to the vertical passage 30b of the upper cylinder 30 is formed as a suction passage for introducing the refrigerant into the compression chamber 51.
  • the vertical passage 40a connects the vertical passage 30b of the upper cylinder 30 to a later-described lateral passage 50a of the lower cylinder 50.
  • the lower cylinder 50 which is adjacent to the upper cylinder 30 via the middle plate 40 is a substantially circular plate in the same manner as the upper cylinder 30.
  • the compression chamber 51 is formed as a circular hole penetrating the lower cylinder 50 in the axial direction of the drive shaft 3b.
  • the piston 52 is provided in the compression chamber 51.
  • the piston 52 is constituted by an annular roller 52a and a blade 52b which extends radially outward from the outer circumferential surface of the roller 52a.
  • the roller 52a is attached to be rotatable relative to the outer circumferential surface of the eccentric portion 3d and is provided in the compression chamber 51.
  • a lateral passage 50a which extends in the radial direction of the lower cylinder 50 is formed as a suction passage for introducing the refrigerant into the compression chamber 51.
  • the lateral passage 50a is a cutout formed in the top surface of the lower cylinder 50.
  • a radially inner end portion of the lateral passage 50a is open at the compression chamber 51.
  • a radially outer end portion of the lateral passage 50a is closed by the wall surface of the lower cylinder 50 in the radial direction and is open upward.
  • the radially outer end portion of the lateral passage 50a is connected to the vertical passage 40a of the middle plate 40 at the upward opening. Except at the opening, the lateral passage 50a is closed by the bottom surface of the middle plate 40.
  • a blade accommodation portion 53 is formed in the lower cylinder 50.
  • This portion 53 is a recess formed radially outward from the circumferential wall surface of the compression chamber 51.
  • a pair of bushes 54 are housed in the blade accommodation portion 53 to oppose each other in the circumferential direction of the lower cylinder 50.
  • Each bush 54 is a half of a substantially cylindrical member.
  • the pair of bushes 54 are swingable in the blade accommodation portion 53 while the blade 52b is provided between them. Between the pair of bushes 54, the blade 52b is movable in the radial direction of the lower cylinder 50.
  • the compression chamber 51 is divided into a low-pressure chamber and a high-pressure chamber by the blade 52b.
  • the lower head 60 is provided to be in contact with the lower end face of the lower cylinder 50.
  • the compression chamber 51 is defined on account of the closure of the lower end of the compression chamber 51 by the lower head 60.
  • the lower head 60 is substantially annular in shape, and the drive shaft 3b is rotatably inserted at a central portion of the lower head 60.
  • the lower muffler 70 is provided below the lower head 60.
  • a lower muffler space is formed between the lower head 60 and the lower muffler 70. This lower muffler space is provided for the purpose of reducing noise due to the discharge of the refrigerant.
  • a discharge hole 55 is formed in the lower head 60 to cause the compression chamber 51 to communicate with the lower muffler space so that the refrigerant compressed in the compression chamber 51 is discharged to the lower muffler space.
  • the discharge hole 55 is closed by a plate-shaped discharge valve (not shown) .
  • the discharge valve is elastically deformed when the pressure in the compression chamber 51 becomes equal to or higher than a predetermined pressure, with the result that the discharge hole 55 is opened.
  • the lower muffler space communicates with the upper muffler space via the through holes formed in the lower head 60, the lower cylinder 50, the middle plate 40, the upper cylinder 30, and the upper head 20,
  • a suction passage including an upper suction passage (first passage) and a lower suction passage (second passage) branched from the upper suction passage (first passage) is formed in the rotary compressor 1 of the present embodiment.
  • the upper suction passage supplies the compression chamber 31 of the upper cylinder 30 with refrigerant.
  • the upper suction passage supplies the compression chamber 51 of the lower cylinder 50 with the refrigerant.
  • the upper suction passage is a part of the lateral passage 30a formed in the upper cylinder 30 and is a horizontal passage from the leading end of the suction pipe 6 to the compression chamber 31.
  • the upper suction passage passes through the upper cylinder 30 but does not pass through the lower cylinder 50.
  • the lower suction passage is constituted by the vertical passage 30b formed in the upper cylinder 30, the vertical passage 40a formed in the middle plate 40, and the lateral passage 50a formed in the lower cylinder 50 (see FIG. 3 ).
  • the lower suction passage passes through both of the upper cylinder 30 and the lower cylinder 50.
  • a horizontal passage from the leading end of the suction pipe 6 to the compression chamber 31 in the lateral passage 30a (not including a part from the leading end of the suction pipe 6 to the radially outer end portion of the lateral passage 30a of the lateral passage 30a) and the vertical passage 30b constitute the suction passage.
  • the lateral passage 50a constitutes the suction passage in the lower cylinder 50.
  • the surface area of a region facing the suction passage in the lower cylinder 50 is smaller than the surface area of a region facing the suction passage in the upper cylinder 30.
  • the surface area of a region facing a suction passage in a cylinder indicates the surface area of the inner circumferential surface of a wall of the cylinder, which constitutes the suction passage, i.e., the surface area of a wall surface of the cylinder, where the refrigerant sucked from the accumulator 5 passes through.
  • the surface area of the region facing the suction passage in the upper cylinder 30 is equal to the total of the surface area of the region facing the horizontal passage from the leading end of the suction pipe 6 to the compression chamber 31 in the lateral passage 30a and the surface area of the region facing the vertical passage 30b, and the surface area of the region facing the suction passage in the lower cylinder 50 is equal to the surface area of the region facing the lateral passage 50a.
  • the difference between the height A3 of the lower cylinder 50 and the height A4 of the piston 52 in the compression chamber 51 of the lower cylinder 50 is smaller than the difference between the height A1 of the upper cylinder 30 and the height A2 of the piston 32 in the compression chamber 31 of the upper cylinder 30 (A3-A4 ⁇ A1-A2).
  • the difference between the height A1 of the upper cylinder 30 and the height A2 of the piston 32 and the difference between the height A3 of the lower cylinder 50 and the height A4 of the piston 52 are those when the compressor 1 is not driven (i.e., at normal temperature).
  • a suction passage including an upper suction passage and a lower suction passage branched from the upper suction passage is formed in the rotary compressor 1 of the present embodiment.
  • the upper suction passage supplies the compression chamber 31 of the upper cylinder 30 with refrigerant.
  • the suction pipe 6 is connected to the compression chamber 31.
  • the lower suction passage supplies the compression chamber 51 of the lower cylinder 50 with the refrigerant.
  • the surface area of a region facing the suction passage in the lower cylinder 50 is smaller than the surface area of a region facing the suction passage in the upper cylinder 30. For this reason, as compared to the upper cylinder 30, the decrease in temperature of the refrigerant at around the region facing the suction passage in the cylinder is small in the lower cylinder 50.
  • the upper suction passage (first passage) passes through the upper cylinder 30 but does not pass through the lower cylinder 50
  • the lower suction passage (second passage) is branched from the upper suction passage in the upper cylinder 30 and passes through both the upper cylinder 30 and the lower cylinder 50.
  • the upper cylinder 30 is configured to be inserted by the suction pipe 6 so that the leading end of the suction pipe 6 is provided inside the upper cylinder 30.
  • the passage for the refrigerant from the leading end of the suction pipe 6 to the compression chamber 31 of the upper cylinder 30 is constituted solely of the linear lateral passage 30a, with the result that the increase in suction resistance is suppressed.
  • a driving mechanism 3 and a compression mechanism 104 are housed.
  • a lateral passage 120a extending in the radial direction of the upper head 120 and a vertical passage 120b extending vertically downward from the lateral passage 120a are formed in the upper head 120 which opposes a lower cylinder 50 over an upper cylinder 130, as a suction passage for introducing refrigerant into a compression chamber 31 of the upper cylinder 130.
  • a radially inner end portion of the lateral passage 120a is closed by the wall surface of the upper head 120 in the radial direction and is open downward.
  • the radially inner end portion of the lateral passage 120a is connected to a lateral passage 130a of the upper cylinder 130 at the downward opening.
  • a radially outer end portion of the lateral passage 120a is open at the outer circumferential surface of the upper head 120.
  • the suction pipe 6 is inserted into the lateral passage 120a, and a leading end of the suction pipe 6 is at around the center of the lateral passage 120a.
  • the lateral passage 130a which extends in the radial direction of the upper cylinder 130 is formed as a suction passage for introducing the refrigerant into the compression chamber 31 of the upper cylinder 130.
  • the lateral passage 130a is a cutout formed in the top surface of the upper cylinder 130.
  • a radially inner end portion of the lateral passage 130a is open at the compression chamber 31.
  • a radially outer end portion of the lateral passage 130a is closed by the wall surface of the upper cylinder 130 in the radial direction and is open upward.
  • the radially outer end portion of the lateral passage 130a is connected to the vertical passage 120b of the upper head 120 at the upward opening.
  • a vertical passage 130b which extends vertically downward from the lateral passage 130a is formed as a suction passage for introducing the refrigerant into the compression chamber 51 of a lower cylinder 150.
  • the vertical passage 130b is branched from the lateral passage 130a, extends vertically downward, and is open at the bottom surface of the upper cylinder 130.
  • a vertical passage 40a connected to the vertical passage 130b of the upper cylinder 130 is formed as a suction passage for introducing the refrigerant into the compression chamber 51 of the lower cylinder 50.
  • the vertical passage 40a connects the vertical passage 130b of the upper cylinder 130 to a later-described lateral passage 50a of the lower cylinder 50.
  • a lateral passage 50a which extends in the radial direction of the lower cylinder 50 is formed as a suction passage for introducing the refrigerant into the compression chamber 51.
  • the lateral passage 50a is a cutout formed in the top surface of the lower cylinder 50.
  • a radially inner end portion of the lateral passage 50a is open at the compression chamber 51.
  • a radially outer end portion of the lateral passage 50a is closed by the wall surface of the lower cylinder 50 in the radial direction and is open upward.
  • the radially outer end portion of the lateral passage 50a is connected to the vertical passage 40a of the middle plate 40 at the upward opening. Except at the opening, the lateral passage 50a is closed by the bottom surface of the middle plate 40.
  • a suction passage including an upper suction passage (first passage) and a lower suction passage (second passage) branched from the upper suction passage (first passage) is formed in the rotary compressor 101 of the present embodiment.
  • the upper suction passage supplies the compression chamber 31 of the upper cylinder 130 with refrigerant.
  • the lower suction passage supplies the compression chamber 51 of the lower cylinder 50 with the refrigerant.
  • the upper suction passage is constituted by (i) a horizontal passage from the leading end of the suction pipe 6 to the radially inner end portion of the lateral passage 50a and the vertical passage 120b in the lateral passage 120a, which are formed in the upper head 120 and (ii) the lateral passage 130a formed in the upper cylinder 130.
  • the lower suction passage is constituted by the vertical passage 130b formed in the upper cylinder 130, the vertical passage 40a formed in the middle plate 40, and the lateral passage 50a formed in the lower cylinder 50 (see FIG. 6 ).
  • the lateral passage 130a and the vertical passage 130b constitute the suction passage in the upper cylinder 130.
  • the lateral passage 50a constitutes the suction passage in the lower cylinder 50.
  • the surface area of a region facing the suction passage in the lower cylinder 50 is smaller than the surface area of a region facing the suction passage in the upper cylinder 130.
  • the decrease in temperature of the refrigerant at around the region facing the suction passage is small as compared to the upper cylinder 130.
  • a difference in temperature between the lower cylinder 50 and the piston 52 provided in the compression chamber 51 of the lower cylinder 50 is small, with the result that a difference in amount of dimensional change between the lower cylinder 50 and the piston 52 at thermal expansion is small.
  • the difference between the height A3 of the lower cylinder 50 and the height A4 of the piston 52 in the compression chamber 51 of the lower cylinder 50 is smaller than the difference between the height A1 of the upper cylinder 130 and the height A2 of the piston 32 in the compression chamber 31 of the upper cylinder 130 (A3-A4 ⁇ A1-A2).
  • the difference between the height A1 of the upper cylinder 130 and the height A2 of the piston 32 and the difference between the height A3 of the lower cylinder 50 and the height A4 of the piston 52 are those when the compressor 101 is not driven (i. e., at normal temperature).
  • a suction passage including an upper suction passage and a lower suction passage branched from the upper suction passage is formed in the rotary compressor 101 of the present embodiment.
  • the upper suction passage supplies the compression chamber 31 of the upper cylinder 130 with refrigerant.
  • the upper suction passage supplies the compression chamber 51 of the lower cylinder 50 with the refrigerant.
  • the surface area of a region facing the suction passage in the lower cylinder 50 is smaller than the surface area of a region facing the suction passage in the upper cylinder 130. For this reason, as compared to the upper cylinder 130, the decrease in temperature of the refrigerant at around the region facing the suction passage in the cylinder is small in the lower cylinder 50.
  • the upper suction passage (first passage) passes through the upper cylinder 130 but does not pass through the lower cylinder 50
  • the lower suction passage (second passage) is branched from the upper suction passage in the upper cylinder 130 and passes through both the upper cylinder 130 and the lower cylinder 50.
  • the upper head 120 as an end plate, arranged on the opposite side of the lower cylinder 50 with respect to the upper cylinder 130 is configured to be inserted by the suction pipe 6 so that the leading end of the suction pipe 6 is in the upper head 120.
  • the upper suction passage has one portion where the traveling direction of the refrigerant changes from vertical to horizontal in the upper cylinder 130
  • the lower suction passage has one portion where the traveling direction of the refrigerant changes from vertical to horizontal in the lower cylinder 50.
  • the upper suction passage and the lower suction passage are therefore unlikely to be significantly different from each other in terms of suction resistance.
  • the compressor 201 of Third Embodiment is different from the compressor of First Embodiment in that a lower cylinder 250 is configured to be inserted by a suction pipe 6 of an accumulator 5.
  • a lower cylinder 250 is configured to be inserted by a suction pipe 6 of an accumulator 5.
  • structures identical with those of First Embodiment are denoted by the same reference symbols and may not be explained.
  • a driving mechanism 3 and a compression mechanism 204 are housed.
  • a lateral passage 250a which extends in the radial direction of the lower cylinder 250 is formed as a suction passage for introducing refrigerant into the compression chamber 51 of the lower cylinder 250.
  • a radially inner end portion of the lateral passage 250a is open at the compression chamber 51, whereas a radially outer end portion of the lateral passage 250a is open at the outer circumferential surface of the lower cylinder 250.
  • the suction pipe 6 is inserted into the lateral passage 250a from the radially outer end portion of the lateral passage 250a, and a leading end of the suction pipe 6 is at around the center of the lateral passage 250a.
  • a vertical passage 250b which extends vertically upward from the lateral passage 250a is formed as a suction passage for introducing the refrigerant into the compression chamber 31 of an upper cylinder 230.
  • the vertical passage 250b is branched from a part of the lateral passage 250a, which is between the radially inner end portion of the lateral passage 250a and the leading end of the suction pipe 6.
  • the vertical passage 250b extends vertically upward and is open at the top surface of the lower cylinder 250.
  • a vertical passage 250c extending vertically downward from the lateral passage 250a is formed in the lower cylinder 250.
  • the vertical passage 250c is branched from a part of the lateral passage 250a, which is between the radially inner end portion of the lateral passage 250a and the leading end of the suction pipe 6 (i.e., a part vertically overlapping the vertical passage 250b).
  • the vertical passage 250c extends vertically downward and is open at the bottom surface of the lower cylinder 250. This opening is closed by the lower head 60.
  • a vertical passage 240a connected to the vertical passage 250b of the lower cylinder 250 is formed as a suction passage for introducing the refrigerant into the compression chamber 31.
  • the vertical passage 240a connects the vertical passage 250b of the lower cylinder 250 to a later-described lateral passage 230a of the upper cylinder 230.
  • the lateral passage 230a which extends in the radial direction of the upper cylinder 230 is formed as a suction passage for introducing the refrigerant into the compression chamber 31.
  • the lateral passage 230a is a cutout formed in the bottom surface of the upper cylinder 230.
  • a radially inner end portion of the lateral passage 230a is open at the compression chamber 31.
  • a radially outer end portion of the lateral passage 230a is closed by the wall surface of the upper cylinder 230 in the radial direction and is open downward.
  • the radially outer end portion of the lateral passage 230a is connected to the vertical passage 240a of the middle plate 240 at the downward opening. Except at the opening, the lateral passage 230a is closed by the top surface of the middle plate 240.
  • a suction passage including an lower suction passage (first passage) and a upper suction passage (second passage) branched from the lower suction passage (first passage) is formed in the rotary compressor 201 of the present embodiment.
  • the lower suction passage supplies the compression chamber 51 of the lower cylinder 250 with refrigerant.
  • the upper suction passage supplies the compression chamber 31 of the upper cylinder 230 with the refrigerant.
  • the lower suction passage is a horizontal passage from the leading end of the suction pipe 6 to the compression chamber 51 in the lateral passage 250a formed in the lower cylinder 250
  • the upper suction passage is constituted by the vertical passage 250b formed in the lower cylinder 250, the vertical passage 240a formed in the middle plate 240, and the lateral passage 230a formed in the upper cylinder 230.
  • a horizontal passage from the leading end of the suction pipe 6 to the compression chamber 51 in the lateral passage 250a (not including a part from the leading end of the suction pipe 6 to the radially outer end portion of the lateral passage 250a of the lateral passage 250a) and the vertical passage 250b constitute the suction passage.
  • the lateral passage 230a constitutes the suction passage in the upper cylinder 230.
  • the surface area of a region facing the suction passage in the upper cylinder 230 is smaller than the surface area of a region facing the suction passage in the lower cylinder 250.
  • the decrease in temperature of the refrigerant at around the region facing the suction passage is small as compared to the lower cylinder 250.
  • a difference in temperature between the upper cylinder 230 and the piston 32 provided in the compression chamber 31 of the upper cylinder 230 is small, with the result that a difference in amount of dimensional change between the upper cylinder 230 and the piston 32 at thermal expansion is small.
  • the difference between the height A1 of the upper cylinder 230 and the height A2 of the piston 32 in the compression chamber 31 of the upper cylinder 230 is smaller than the difference between the height A3 of the lower cylinder 250 and the height A4 of the piston 52 in the compression chamber 51 of the lower cylinder 250 (A1-A2 ⁇ A3-A4).
  • the difference between the height A3 of the lower cylinder 250 and the height A4 of the piston 52 and the difference between the height A1 of the upper cylinder 230 and the height A2 of the piston 32 are those when the compressor 201 is not driven (i.e., at normal temperature).
  • a suction passage including an lower suction passage and a upper suction passage branched from the lower suction passage is formed in the rotary compressor 201 of the present embodiment.
  • the lower suction passage supplies the compression chamber 51 of the lower cylinder 250 with refrigerant.
  • the upper suction passage supplies the compression chamber 31 of the upper cylinder 230 with the refrigerant.
  • the surface area of a region facing the suction passage in the upper cylinder 230 is smaller than the surface area of a region facing the suction passage in the lower cylinder 250. For this reason, as compared to the lower cylinder 250, the decrease in temperature of the refrigerant at around the region facing the suction passage in the cylinder is small in the upper cylinder 230.
  • the lower suction passage (first passage) passes through the lower cylinder 250 but does not pass through the upper cylinder 230
  • the upper suction passage (second passage) is branched from the lower suction passage in the lower cylinder 250 and passes through both the lower cylinder 250 and the upper cylinder 230.
  • the lower cylinder 250 is configured to be inserted by the suction pipe 6 so that the leading end of the suction pipe 6 is provided inside the lower cylinder 250.
  • the passage for the refrigerant from the leading end of the suction pipe 6 to the compression chamber 51 of the lower cylinder 250 is constituted solely of the linear lateral passage 250a, with the result that the increase in suction resistance is suppressed.
  • the difference between the height of the cylinder and the height of the piston is arranged to be small in the second cylinder as compared to the first cylinder, with the result that oil leakage from the inner periphery of the piston to the compression chamber is suppressed and the compressor efficiency is thereby improved.
  • seizure due to sliding friction between the piston and the end plate tends to occur and the reliability is decreased.
  • the difference between the height of the cylinder and the height of the piston is large, the reliability is improved as seizure due to sliding friction between the piston and the end plate is less likely to occur, but the compressor efficiency is deteriorated.
  • the inventors of present invention conducted a verification test by using plural rotary compressors (including those of different types) in order to prove whether allowable compressor efficiency was obtained while the reliability was ensured.
  • the following variables were used: the height He (mm) of a cylinder in the axial direction of a drive shaft; the height Hp (mm) of a piston provided in a compression chamber formed in the cylinder, in the axial direction; the surface area As (mm 2 ) of a region facing a suction passage in the cylinder; and the length Ls (mm) of the suction passage in the cylinder.
  • the length Ls is the length of the suction passage in a plane orthogonal to the axial direction of the drive shaft, and is equivalent to the length in the radial direction of the cylinder in the embodiments above. Examples of the length Ls are indicated as L1 and L2 in FIG. 3 , FIG. 6 , and FIG. 8 .
  • FIG. 9 is a graph showing the results of the test.
  • the parameter on the vertical axis indicates (difference in height between cylinder and piston (Hc-Hp) / height He of cylinder), i.e., a rate of change of the cylinder height with respect to temperature variation.
  • the parameter on the horizontal axis indicates (surface area As of region facing suction passage in cylinder / cylinder height Hp ⁇ length Ls of suction passage in longitudinal direction), i.e., likelihood of temperature variation of the cylinder.
  • the temperature at around the region facing the suction passage in the cylinder varies in accordance with the balance of the surface area As of the region, the cylinder height Hp, and the length Ls of the suction passage in the longitudinal direction.
  • an approximate line A which is depicted as a linear line is a limit line indicating the minimum performance in terms of compressor efficiency. Allowable compressor efficiency is obtained in a region below the approximate line A.
  • an approximate line B which is depicted as a linear line with the same inclination as the approximate line A is a limit line indicating minimum reliability (with no seizure) . Seizure does not occur in a region above the approximate line B.
  • the first cylinder may be a lower cylinder 50 and the second cylinder may be an upper cylinder 30.
  • the surface area of a region facing the suction passage in the upper cylinder 30 may be smaller than the surface area of a region facing the suction passage in the lower cylinder 50.
  • the first cylinder may be a lower cylinder 50 and the second cylinder may be an upper cylinder 130.
  • the surface area of a region facing the suction passage in the upper cylinder 130 may be smaller than the surface area of a region facing the suction passage in the lower cylinder 50.
  • the first cylinder may be an upper cylinder 230 and the second cylinder may be a lower cylinder 250.
  • the surface area of a region facing the suction passage in the lower cylinder 250 may be smaller than the surface area of a region facing the suction passage in the upper cylinder 230.
  • the arrangements (e.g., layout and cross-sectional shape) of the suction passage may be different from those described in First to Third Embodiments.
  • the lateral passages 30a, 50a, 130a, 230a, and 250a extend in the radial direction of the cylinder, these lateral passages may extend in any directions in the plane orthogonal to the axial direction of the drive shaft, on condition that they communicate with the compression chamber.
  • the accumulator fixed to the rotary compressor of the present invention is taken as an example of the external device, the external device is not limited to this.
  • the external device may be an accumulator not fixed to the rotary compressor of the present invention or a device (e.g., an evaporator) which is not an accumulator, for example.
  • roller and the blade of the piston are integrated, the roller and the blade may be independent from each other.
  • the rotary compressor may include three or more cylinders.
  • the difference between the height of a cylinder in the axial direction of a drive shaft and the height of a piston provided in a compression chamber of the cylinder in the axial direction preferably decreases as the surface area of a region facing a suction passage in the cylinder decreases.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Supercharger (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
EP18767860.2A 2017-03-17 2018-03-16 Rotary compressor Active EP3597923B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017052710 2017-03-17
PCT/JP2018/010583 WO2018169072A1 (ja) 2017-03-17 2018-03-16 ロータリ圧縮機

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EP3597923A1 EP3597923A1 (en) 2020-01-22
EP3597923A4 EP3597923A4 (en) 2021-01-20
EP3597923B1 true EP3597923B1 (en) 2023-05-31

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JP7539372B2 (ja) * 2019-04-25 2024-08-23 三菱重工サーマルシステムズ株式会社 ロータリ圧縮機
CN110848140A (zh) * 2019-11-27 2020-02-28 广东美芝制冷设备有限公司 压缩机吸气结构、压缩机及制冷制热设备
DE102020117343A1 (de) * 2020-07-01 2022-01-05 Weinmann Emergency Medical Technology Gmbh + Co. Kg Pumpvorrichtung, Vorrichtung zur Beatmung sowie Verfahren zur Bereitstellung eines Atemgases
JP7570854B2 (ja) * 2020-09-07 2024-10-22 瀋陽中航機電三洋制冷設備有限公司 回転圧縮機
JP2024145222A (ja) * 2023-03-31 2024-10-15 ダイキン工業株式会社 ２シリンダロータリー圧縮機

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JPS6176790A (ja) * 1984-09-19 1986-04-19 Sanyo Electric Co Ltd ロ−タリ圧縮機の組立方法
JPS62195483A (ja) * 1986-02-21 1987-08-28 Toshiba Corp ２シリンダ形ロ−タリコンプレツサ
JPH02218884A (ja) * 1989-02-21 1990-08-31 Toshiba Corp 多シリンダ圧縮機
JP2001132673A (ja) * 1999-11-04 2001-05-18 Matsushita Electric Ind Co Ltd 密閉型ロータリー圧縮機
KR20030051086A (ko) * 2001-12-20 2003-06-25 주식회사 엘지이아이 회전식 트윈 압축기의 흡입장치
JP2005207306A (ja) * 2004-01-22 2005-08-04 Mitsubishi Electric Corp ２気筒回転圧縮機
JP2009062929A (ja) * 2007-09-07 2009-03-26 Toshiba Carrier Corp 回転式圧縮機及び冷凍サイクル装置
CN102644597B (zh) * 2011-02-16 2014-09-24 广东美芝制冷设备有限公司 双缸式旋转压缩机
JP6112104B2 (ja) 2014-12-19 2017-04-12 株式会社富士通ゼネラル ロータリ圧縮機

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MY195534A (en) 2023-01-31
CN110418892A (zh) 2019-11-05
EP3597923A4 (en) 2021-01-20
JPWO2018169072A1 (ja) 2019-12-12
JP6787480B2 (ja) 2020-11-18
ES2953629T3 (es) 2023-11-14
CN110418892B (zh) 2021-07-06
EP3597923A1 (en) 2020-01-22
WO2018169072A1 (ja) 2018-09-20

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