EP2733306B1 - Compressor having rotary compression mechanism with a muffler cover - Google Patents
Compressor having rotary compression mechanism with a muffler cover Download PDFInfo
- Publication number
- EP2733306B1 EP2733306B1 EP13190098.7A EP13190098A EP2733306B1 EP 2733306 B1 EP2733306 B1 EP 2733306B1 EP 13190098 A EP13190098 A EP 13190098A EP 2733306 B1 EP2733306 B1 EP 2733306B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compression mechanism
- rotary compression
- refrigerant
- cylinder
- boss
- 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
Links
- 230000006835 compression Effects 0.000 title claims description 51
- 238000007906 compression Methods 0.000 title claims description 51
- 239000003507 refrigerant Substances 0.000 claims description 71
- 230000002093 peripheral effect Effects 0.000 claims description 37
- 239000000314 lubricant Substances 0.000 claims description 22
- 239000003921 oil Substances 0.000 description 28
- 239000000463 material Substances 0.000 description 10
- 239000003595 mist Substances 0.000 description 9
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
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- 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
- F01C21/007—General arrangements of parts; Frames and supporting elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
-
- 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
- F04C29/06—Silencing
- F04C29/065—Noise dampening volumes, e.g. muffler chambers
-
- 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
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/005—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 dissimilar working principle
Definitions
- the present invention relates to a compressor having a rotary compression mechanism.
- rotary compressors are used for compressing refrigerant gas in refrigerant circuits, for example.
- PTL1 1 discloses a technique that provides a muffler disposed so as to cover a feed port formed at a head of a bearing of a rotary compression mechanism, and a netted material disposed in the cover of the muffler so as to collect mists of the lubricant oil contained in the refrigerant with this netted material in the muffler.
- a technique is also disclosed for providing dual covers outside the muffler, and disposing the netted material between these covers.
- PTL2 discloses a compressor according to the preamble of claim 1.
- Patent Literature 1 has a disadvantage in necessity of installing the netted material between the covers, which is tedious and time-consuming working for installing this.
- An object of the present invention which has been made in order to solve the problems according to the conventional art, is to provide a compressor that has a rotary compression mechanism with a simple structure, facilitates assembly of the compressor, and is capable of collecting lubricant oil in refrigerant with lower cost.
- a compressor having a rotary compression mechanism includes in a housing a rotary compression mechanism for compressing gas, and a driving unit for driving the rotary compression mechanism, wherein the rotary compression mechanism includes: a cylinder having a cylindrical inner surface; a crankshaft extending through the cylinder, being rotationally driven around a central axis of the cylinder by the driving unit, and having an eccentric axial portion eccentric to the central axis of the cylinder in the cylinder; plate members for covering apertures at both end portions of the cylinder; a discharge port formed in at least one of the plate members, and communicating with an inside of the cylinder; a boss in a cylindrical shape integrally disposed with the plate member in which the discharge port is formed, and rotatably supporting the crankshaft that extends through the boss; a muffler cover whose outer periphery abuts against the plate member, and whose inner periphery opposes an outer peripheral surface of the boss so as to form a muffler chamber into which refriger
- the collecting member Since the collecting member is placed in the peripheral groove in the boss, the collecting member can be securely positioned, and placed at the refrigerant outlet between the inner periphery of the muffler cover and the outer periphery of the boss. At this time, no special components are required for installing the collecting member, which attains a simple structure with less components.
- communicating passages may be formed between the outer periphery of the muffler cover and the plate member so as to communicate with an inside and an outside of the muffler chamber, and each communicating passage may have a bent or curved portion between an inner end portion of the muffler chamber and an outer end portion of the muffler chamber.
- each communicating passage has a bent or curved portion at a middle position of the communicating passage, which hinders the lubricant oil from flowing outside the muffler chamber, and thus pressure loss is secured so as to easily maintain a high refrigerant pressure in the muffler chamber.
- the compressor having a rotary compression mechanism further includes: a scroll compression mechanism including a fixed scroll fixed to the housing; and an orbit scroll eccentrically orbiting relative to the fixed scroll through the crankshaft.
- the compressor including the rotary mechanism of the present invention has a simple structure, facilitates assembly, and is capable of collecting lubricant oil in refrigerant with lower cost.
- a compressor 1 is disposed in a refrigerant circuit of an air conditioner, such as a room air conditioner and a package air conditioner, so as to compress refrigerant gas flowing through this refrigerant circuit.
- an air conditioner such as a room air conditioner and a package air conditioner
- the compressor 1 includes a housing 2 of a substantially cylindrical sealed vessel whose both ends are closed, and the housing 2 is disposed with its axis line substantially vertical.
- This housing 2 stores a rotary compression mechanism 3 for compressing refrigerant gas supplied from the refrigerant circuit, and a driving unit 4 for driving the rotary compression mechanism 3.
- This rotary compression mechanism 3 is disposed in a lower portion of the housing 2, and the driving unit 4 is disposed above the rotary compression mechanism 3.
- Refrigerant piping P1 of the refrigerant circuit is externally introduced into the housing 2 at its lower side surface, and the refrigerant gas in the refrigerant circuit is supplied to the rotary compression mechanism 3 through the refrigerant piping P1.
- An oil reserving chamber (not shown) is disposed at a bottom of the housing 2, and lubricant oil for use in lubrication of the rotary compression mechanism 3 or the like is reserved in this oil reserving chamber.
- the rotary compression mechanism 3 compresses the refrigerant gas supplied from the refrigerant piping P1 into a high-pressure compressed gas, and thereafter feeds this gas into the housing 2.
- Refrigerant piping P3 is externally introduced through a ceiling of the housing 2 so as to feed the compressed gas temporarily reserved in the housing 2 downstream of the refrigerant circuit through the refrigerant piping P3.
- the rotary compression mechanism 3 includes a cylinder 11 having a cylindrical inner surface 12.
- the cylinder 11 is disposed such that the cylindrical inner surface 12 substantially becomes coaxial to the housing 2.
- a cylindrical rotor 14 having a smaller diameter than that of the cylindrical inner surface 12 is disposed inside the cylinder 11 with its axis line substantially horizontal to the axis line of the cylindrical inner surface 12.
- Plural pairs of the cylinders 11 and the rotors 14 may be arranged with intervals in the central axial direction of the housing 2.
- a crankshaft 16 having an axis line coaxial with the cylinder 11 is inserted through the cylinder 11 and the rotor 14.
- the crankshaft 16 is supported at its upper end portion by the driving unit 4, and is rotationally driven around its axis line by the driving unit 4.
- the driving unit 4 is constituted by an electric motor having a rotor for holding the upper end portion of the crankshaft 16. The driving unit 4 rotates this rotor so as to rotationally drive the crankshaft 16.
- the driving unit 4 includes a rotor 21 that is fit over the crankshaft 16, and a stator 22 that is disposed on the outer periphery of the rotor 21.
- the rotor 21 includes a core (referred to as a "rotor core") 23 formed by laminating plural thin silicon steel plates having a predetermined shape.
- An axial hole 24 is formed in the core rotor 23 along its central axis line, and the crankshaft 16 is pressed into this axial hole 24.
- Plural through holes (referred to as “passages”, hereinafter) 25 extending in the vertical direction along the axial hole 24 are formed in the rotor core 23. The lower ends of these passages 25 are formed to be open ends.
- a disk-like oil separating plate 28 is attached at an upper end face 23a of the rotor core 23 so as to cover this upper end face 23a.
- the stator 22 includes a core (referred to as a "stator core”, hereinafter) 30 formed by laminating plural thin silicon steel plates having a predetermined shape, and a coil end 31 wound around teeth of the stator core 30.
- the stator core 30 is pressed into (shrinkage-fitted into) the housing 2.
- An eccentric axial portion 17 having a substantially cylindrical shape is disposed in a region of the crankshaft 16 which is inserted in the cylinder 11.
- the crankshaft 16 is rotationally driven around its axis line so that the rotor 14 is eccentrically rotated along the cylindrical inner surface 12 of the cylinder 11.
- crankshaft 16 is supported at its lower end by an end bearing 40 so as to be rotatable around the axis line.
- the end bearing 40 includes a lower bearing bracket 41 disposed at the lower portion of the cylinder 11, and an upper bearing bracket 60 disposed at the upper portion of the cylinder 11.
- the lower bearing bracket 41 has a disk-like lower plate (plate member) 43 that abuts against a lower face of the cylinder 11.
- a shaft hole 44 is formed to extend through the central portion of the lower bearing bracket 41, and the crankshaft 16 is rotatably supported through this shaft hole 44 via a bearing (not shown).
- a refrigerant discharge port 45 is formed to extend through the lower plate 43 from the upper face to the lower face of the lower plate 43 at a position facing the cylindrical inner surface 12 of the cylinder 11.
- the lower face of the lower plate 43 is provided with a boss 46 extending downward at the central portion of the lower face of the lower plate 43, and an outer peripheral wall 47 extending downward at the outer periphery of the lower face of the lower plate 43; and a tubular groove 48 is formed to continuously extend in the peripheral direction between the boss 46 and the outer peripheral wall 47.
- a refrigerant discharge port 45 is formed to face this groove 48.
- the lower bearing bracket 41 is clamped to the cylinder 11 with bolts 55 at plural positions in the peripheral direction of the outer periphery of the lower bearing bracket 41.
- An end plate 49 is fixed below the lower plate 43, and this end plate 49 and a plate 51 are so disposed as to cover the groove 48, thereby forming an annular lower muffler chamber M1.
- the refrigerant discharged from the hole of the port 45 flows through a communicating hole 101 formed in the lower plate 43, the cylinder 11, and the upper bearing bracket 60 to an upper muffler chamber M2 described later.
- the refrigerant is mixed with refrigerant discharged from a hole of a port 65, and flows from a refrigerant outlet 69 into the compressor. Hence, it is configured that the compressed refrigerant always flows through a netted material 80 in the muffler.
- the end plate 49 shields the shaft hole 44.
- a lubricant oil flow passage 49a that sucks the lubricant oil from the oil reserving chamber at the bottom of the housing 2, and supplies the lubricant oil to the crankshaft 16 in the shaft hole 44 is formed to extend through this end plate 49.
- an upper bearing bracket 60 includes a disk-like upper plate (plate member) 61 that abuts against the upper face of the cylinder 11, and a boss 62 extending upward from the upper plate 61.
- a shaft hole 63 is formed to extend through the central portion of the upper bearing bracket 60, and the crankshaft 16 is rotatably supported through this shaft hole 63 via a bearing (not shown).
- a refrigerant discharge port (discharge port) 65 is formed to extend from the upper face to the lower face of the upper plate 61 at its position facing the cylindrical inner surface 12 of the cylinder 11.
- a peripheral groove 66 having a given height in the vertical direction, and continuously extending in the peripheral direction is formed in an outer peripheral surface 62a of the boss 62.
- a muffler cover 70 in a dome shape is provided on the upper face of the upper plate 61.
- the muffler cover 70 has a dome shape whose diameter is gradually reduced upward from an outer periphery 70a thereof, and an aperture 71 is formed on a top end (inner periphery) 70b of the muffler cover 70.
- the outer periphery of the muffler cover 70 abuts against the upper face of the upper plate 61, and in this state, the muffler cover 70 along with the upper plate 61 are clamped to the cylinder 11 with bolts 67 at plural positions of the outer periphery in the peripheral direction of the muffler cover 70.
- a muffler chamber (muffler chamber) M2 continuously extending around the boss 62 in the peripheral direction is defined by the muffler cover 70, the upper plate 61, and the boss 62.
- the aperture 71 is formed by a cylindrical portion 72 extending upward.
- the cylindrical portion 72 is disposed to be opposite to the peripheral groove 66 with a distance from the outer periphery of the peripheral groove 66 in a state that the muffler cover 70 is fixed to the upper plate 61. In this manner, an annular gap is generated between the top end 70b of the muffler cover 70 and the boss 62, and this gap serves as the refrigerant outlet 69 for the refrigerant flowing from the muffler chamber M2.
- a mist collecting member (collecting member) 80 made of a steel wool, netted, or porous material is placed in the peripheral groove 66, and is installed between the peripheral groove 66 and the cylindrical portion 72 of the muffler cover 70.
- the mist collecting member 80 may be previously formed in a cylindrical shape, and is then placed in the peripheral groove 66, or the mist collecting member 80 may be previously formed in a web or tape shape, for example, and is then wound around the peripheral groove 66 in the peripheral direction.
- a metallic plate 75 is disposed between the upper plate 61 and the muffler cover 70, for example.
- This plate 75 is provided at its outer periphery with communicating passages 76 interconnecting the upper muffler chamber M2 and a space outside the outer periphery of the upper bearing bracket 60.
- Each communicating passage 76 is preferably formed to have a cross sectional area as small as possible so as to generate pressure loss. Hence, in the present embodiment, each communicating passage 76 is formed in a groove shape in a side surface of the plate 75.
- the refrigerant gas supplied from the refrigerant piping P1 into the cylinder 11 is compressed by the rotor 14 eccentrically rotating in the cylinder 11.
- the compressed refrigerant is fed from the lower refrigerant discharge port 45 into the lower muffler chamber M1, and from the upper refrigerant discharge port 65 into the upper muffler chamber M2, and is then fed from the lower muffler chamber M1 and from the upper muffler M2 into the housing 2.
- Lubricant oil sucked up from the oil reserving chamber at the bottom of the housing 2 through the lubricant oil flow passage 49a is mixed in the refrigerant that is fed into the lower muffler chamber M1 and the upper muffler chamber M2 in order to lubricate the movable portions of the rotary compression mechanism 3.
- the refrigerant fed in the housing 2 flows through the passages 25 formed in the rotor core 23, and is fed through the refrigerant piping P3 at the ceiling portion of the housing 2 downstream of the refrigerant circuit.
- the refrigerant containing the lubricant oil fed from the refrigerant discharge port 65 into the upper muffler chamber M2 flows through the mist collecting member 80 disposed at the refrigerant outlet 69 between the cylindrical portion 72 of the muffler cover 70 and the boss 62, and is fed into the housing 2.
- the lubricant oil contained in the refrigerant is collected when it flows through the mist collecting member 80, thereby feeding only the refrigerant into the housing 2.
- the collected lubricant oil flows down on the upper plate 61 by the gravity, and is pressed with gas pressure of the refrigerant in the upper muffler chamber M2, through the communicating passages 76 at the outer periphery of the plate 75 into the housing 2, and then falls down in the oil reserving chamber at the bottom of the housing 2.
- the mist collecting member 80 disposed at the refrigerant outlet 69 communicating from the upper muffler chamber M2 can collect the lubricant oil contained in the refrigerant.
- the mist collection member 80 is placed in the peripheral groove 66 formed in the boss 62, and is held between the boss 62 and the cylindrical portion 72 of the muffler cover 70.
- the compressor 1 can be configured to have a simple structure with less components, to be easily assembled, and to be capable of securely collecting the lubricant oil at low cost.
- each communicating passage 78 is preferably configured to have a bent portion 78c or a curved portion between an inner end portion 78a of the muffler chamber M2 and an outer end portion 78b of the muffler chamber M2.
- the communicating passage 78 shown in Fig. 4 is formed to be cranked, for example.
- This configuration hinders the lubricant oil from flowing through the communicating passage 78 to the outside of the muffler chamber M2, thereby securing pressure loss at this portion so as to maintain a high refrigerant pressure in the muffler chamber M2.
- the gasket 77 made of a softer material than that of the plate 75 facilitates fine machining on each communicating passage 78 having such a bent portion.
- the gasket 77 may have a thinner thickness than that of the plate 75. Accordingly, the cross sectional area of each communicating passage 78 can be smaller, and the cranked bent portion thereof can prevent pressure leakage of the refrigerant in the upper muffler chamber M2.
- through holes 79 may be formed in the upper plate 61 in such a manner that each through hole 79 extends through the upper plate 61, one end of the through hole 79 is open to an upper face 61a of the upper plate 61, and the other end thereof is open to an outer peripheral surface 61b of the upper plate 61.
- a compressor 100 having the rotary compression mechanism of the present invention may include a scroll compression mechanism 90 at the upper end portion of the crankshaft 16 in addition to the aforementioned configuration.
- the scroll compression mechanism 90 includes an orbit scroll 91 disposed at the upper end portion of the crankshaft 16, and a fixed scroll 92 fixed to the housing 2.
- the orbit scroll 91 and the fixed scroll 92 include a disk-like end plate 93 and a disk-like end plate 95, respectively, and also includes a scroll gear 94 and a scroll gear 96 that are integrally formed with an end plate 93 and an end plate 95, respectively.
- This scroll compression mechanism 90 compresses the refrigerant between the scroll gears 94 and 96 that are meshed with each other.
- This compressor 100 includes the rotary compression mechanism 3 having the same configuration as aforementioned configuration at low stage, and includes the scroll compression mechanism 90 at high stage so as to compress the refrigerant at two stages.
- the rotary compression mechanism 3 having the same configuration as aforementioned configuration can also attain the same advantageous effects.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
- The present invention relates to a compressor having a rotary compression mechanism.
- In air conditioners, such as room air conditioners and packaged air conditioners, rotary compressors are used for compressing refrigerant gas in refrigerant circuits, for example.
- There have recently been used so-called "scrotary" two-stage compressors each having a rotary compression mechanism at low stage, and a scroll compression mechanism at high stage.
- In these compressors each having a rotary compression mechanism, it is required to reduce sliding resistance at a sliding portion between a cylinder disposed in a casing of the compressor and a piston eccentrically disposed to a crankshaft extending through the cylinder, and also to reduce sliding resistance at a bearing or the like for rotatably supporting the crankshaft. Hence, refrigerant containing lubricant oil is fed into the rotary compression mechanism of the rotary compressor.
- Lubricant oil mixed in the refrigerant should be prevented from flowing into a refrigerating circuit outside the casing.
PTL1 1 discloses a technique that provides a muffler disposed so as to cover a feed port formed at a head of a bearing of a rotary compression mechanism, and a netted material disposed in the cover of the muffler so as to collect mists of the lubricant oil contained in the refrigerant with this netted material in the muffler. A technique is also disclosed for providing dual covers outside the muffler, and disposing the netted material between these covers. - PTL2 discloses a compressor according to the preamble of
claim 1. -
- {PTL 1}
Japanese Unexamined Patent Application, Publication No.4-134196 Fig. 1 andFig. 4 ) - {PTL2]
International Patent Application, publication No.WO2006/112168 - Unfortunately, the configuration of
Patent Literature 1 has a disadvantage in necessity of installing the netted material between the covers, which is tedious and time-consuming working for installing this. - In addition, there is another disadvantage in configuration of providing the dual covers outside the muffler, and installing the netted material between the two covers, which makes the structure complicated, and thus the number of components becomes increased, which causes increase in cost.
- An object of the present invention, which has been made in order to solve the problems according to the conventional art, is to provide a compressor that has a rotary compression mechanism with a simple structure, facilitates assembly of the compressor, and is capable of collecting lubricant oil in refrigerant with lower cost.
- A compressor having a rotary compression mechanism according to the present invention includes in a housing a rotary compression mechanism for compressing gas, and a driving unit for driving the rotary compression mechanism, wherein the rotary compression mechanism includes: a cylinder having a cylindrical inner surface; a crankshaft extending through the cylinder, being rotationally driven around a central axis of the cylinder by the driving unit, and having an eccentric axial portion eccentric to the central axis of the cylinder in the cylinder; plate members for covering apertures at both end portions of the cylinder; a discharge port formed in at least one of the plate members, and communicating with an inside of the cylinder; a boss in a cylindrical shape integrally disposed with the plate member in which the discharge port is formed, and rotatably supporting the crankshaft that extends through the boss; a muffler cover whose outer periphery abuts against the plate member, and whose inner periphery opposes an outer peripheral surface of the boss so as to form a muffler chamber into which refrigerant is fed from the cylinder through the discharge port; a refrigerant outlet formed between the inner periphery of the muffler cover and the outer peripheral surface of the boss, the refrigerant outlet feeding the refrigerant from the muffler chamber into the housing; and a collecting member disposed at the refrigerant outlet so as to collect lubricant oil contained in the refrigerant, a peripheral groove is formed in the boss such that the peripheral groove continuously extends in a peripheral direction of the boss at a position opposing the inner periphery of the muffler cover, and the collecting member is placed in the peripheral groove, and is disposed between the inner periphery of the muffler cover and the outer peripheral surface of the boss.
- Since the collecting member is placed in the peripheral groove in the boss, the collecting member can be securely positioned, and placed at the refrigerant outlet between the inner periphery of the muffler cover and the outer periphery of the boss. At this time, no special components are required for installing the collecting member, which attains a simple structure with less components.
- In the above configuration, communicating passages may be formed between the outer periphery of the muffler cover and the plate member so as to communicate with an inside and an outside of the muffler chamber, and each communicating passage may have a bent or curved portion between an inner end portion of the muffler chamber and an outer end portion of the muffler chamber.
- Accordingly, the lubricant oil collected from the refrigerant through the collecting member can be fed from the inside of the muffler through the communicating passages into an inner space of the housing outside the muffler chamber. At this time, each communicating passage has a bent or curved portion at a middle position of the communicating passage, which hinders the lubricant oil from flowing outside the muffler chamber, and thus pressure loss is secured so as to easily maintain a high refrigerant pressure in the muffler chamber.
- In any one of the above configurations, the compressor having a rotary compression mechanism further includes: a scroll compression mechanism including a fixed scroll fixed to the housing; and an orbit scroll eccentrically orbiting relative to the fixed scroll through the crankshaft.
- The compressor including the rotary mechanism of the present invention has a simple structure, facilitates assembly, and is capable of collecting lubricant oil in refrigerant with lower cost.
-
- {
Fig. 1} Fig. 1 is an elevational cross section view of a compressor having a rotary compression mechanism of the present invention; - {
Fig. 2} Fig. 2 is a partially enlarged cross section view of the compressor having the rotary compression mechanism of the present invention; - {
Fig. 3} Figs. 3 are drawings showing an important part of the compressor having the rotary compression mechanism of the present invention,Fig. 3 (a) is a cross section view taken along line a-a ofFig. 3(b), and Fig. 3(b) is a plane cross section view ofFig. 3 (a) ; - {
Fig. 4} Figs. 4 are drawings showing another example of a communicating passage formed in the compressor having the rotary compression mechanism of the present invention,Fig. 4(a) is a cross section view taken along line a-a ofFig. 4(b), and Fig. 4(b) is a plane cross section view ofFig. 4 (a) ; {Fig. 5} Fig. 5 is an elevational cross section view showing further another example of the communicating passage formed in the compressor having the rotary compression mechanism of the present invention; and - {
Fig. 6} Fig. 6 is a drawing showing another example of the compressor having the rotary compression mechanism of the present invention, and is an elevational cross section view of the compressor having the rotary compression mechanism of the present invention, in which a rotary compression mechanism is disposed at low stage, and a scroll compression mechanism is disposed at high stage. - Hereinafter, description will be provided on the embodiment of the present invention with reference to drawings.
- As shown in
Fig. 1 , acompressor 1 according to the present embodiment is disposed in a refrigerant circuit of an air conditioner, such as a room air conditioner and a package air conditioner, so as to compress refrigerant gas flowing through this refrigerant circuit. - The
compressor 1 includes ahousing 2 of a substantially cylindrical sealed vessel whose both ends are closed, and thehousing 2 is disposed with its axis line substantially vertical. - This
housing 2 stores arotary compression mechanism 3 for compressing refrigerant gas supplied from the refrigerant circuit, and adriving unit 4 for driving therotary compression mechanism 3. Thisrotary compression mechanism 3 is disposed in a lower portion of thehousing 2, and thedriving unit 4 is disposed above therotary compression mechanism 3. - Refrigerant piping P1 of the refrigerant circuit is externally introduced into the
housing 2 at its lower side surface, and the refrigerant gas in the refrigerant circuit is supplied to therotary compression mechanism 3 through the refrigerant piping P1. - An oil reserving chamber (not shown) is disposed at a bottom of the
housing 2, and lubricant oil for use in lubrication of therotary compression mechanism 3 or the like is reserved in this oil reserving chamber. - The
rotary compression mechanism 3 compresses the refrigerant gas supplied from the refrigerant piping P1 into a high-pressure compressed gas, and thereafter feeds this gas into thehousing 2. - Refrigerant piping P3 is externally introduced through a ceiling of the
housing 2 so as to feed the compressed gas temporarily reserved in thehousing 2 downstream of the refrigerant circuit through the refrigerant piping P3. - The
rotary compression mechanism 3 includes acylinder 11 having a cylindricalinner surface 12. Thecylinder 11 is disposed such that the cylindricalinner surface 12 substantially becomes coaxial to thehousing 2. Acylindrical rotor 14 having a smaller diameter than that of the cylindricalinner surface 12 is disposed inside thecylinder 11 with its axis line substantially horizontal to the axis line of the cylindricalinner surface 12. - Plural pairs of the
cylinders 11 and therotors 14 may be arranged with intervals in the central axial direction of thehousing 2. - A
crankshaft 16 having an axis line coaxial with thecylinder 11 is inserted through thecylinder 11 and therotor 14. Thecrankshaft 16 is supported at its upper end portion by thedriving unit 4, and is rotationally driven around its axis line by thedriving unit 4. In the present embodiment, thedriving unit 4 is constituted by an electric motor having a rotor for holding the upper end portion of thecrankshaft 16. Thedriving unit 4 rotates this rotor so as to rotationally drive thecrankshaft 16. - The
driving unit 4 includes arotor 21 that is fit over thecrankshaft 16, and astator 22 that is disposed on the outer periphery of therotor 21. - The
rotor 21 includes a core (referred to as a "rotor core") 23 formed by laminating plural thin silicon steel plates having a predetermined shape. Anaxial hole 24 is formed in thecore rotor 23 along its central axis line, and thecrankshaft 16 is pressed into thisaxial hole 24. Plural through holes (referred to as "passages", hereinafter) 25 extending in the vertical direction along theaxial hole 24 are formed in therotor core 23. The lower ends of thesepassages 25 are formed to be open ends. - In addition, a disk-like
oil separating plate 28 is attached at anupper end face 23a of therotor core 23 so as to cover thisupper end face 23a. - The
stator 22 includes a core (referred to as a "stator core", hereinafter) 30 formed by laminating plural thin silicon steel plates having a predetermined shape, and acoil end 31 wound around teeth of thestator core 30. Thestator core 30 is pressed into (shrinkage-fitted into) thehousing 2. - An eccentric
axial portion 17 having a substantially cylindrical shape is disposed in a region of thecrankshaft 16 which is inserted in thecylinder 11. Thecrankshaft 16 is rotationally driven around its axis line so that therotor 14 is eccentrically rotated along the cylindricalinner surface 12 of thecylinder 11. - The
crankshaft 16 is supported at its lower end by an end bearing 40 so as to be rotatable around the axis line. - As shown in
Fig. 1 andFig. 2 , the end bearing 40 includes alower bearing bracket 41 disposed at the lower portion of thecylinder 11, and anupper bearing bracket 60 disposed at the upper portion of thecylinder 11. - The
lower bearing bracket 41 has a disk-like lower plate (plate member) 43 that abuts against a lower face of thecylinder 11. Ashaft hole 44 is formed to extend through the central portion of thelower bearing bracket 41, and thecrankshaft 16 is rotatably supported through thisshaft hole 44 via a bearing (not shown). - A
refrigerant discharge port 45 is formed to extend through thelower plate 43 from the upper face to the lower face of thelower plate 43 at a position facing the cylindricalinner surface 12 of thecylinder 11. - In addition, the lower face of the
lower plate 43 is provided with aboss 46 extending downward at the central portion of the lower face of thelower plate 43, and an outerperipheral wall 47 extending downward at the outer periphery of the lower face of thelower plate 43; and atubular groove 48 is formed to continuously extend in the peripheral direction between theboss 46 and the outerperipheral wall 47. Arefrigerant discharge port 45 is formed to face thisgroove 48. - The
lower bearing bracket 41 is clamped to thecylinder 11 withbolts 55 at plural positions in the peripheral direction of the outer periphery of thelower bearing bracket 41. - An
end plate 49 is fixed below thelower plate 43, and thisend plate 49 and aplate 51 are so disposed as to cover thegroove 48, thereby forming an annular lower muffler chamber M1. The refrigerant discharged from the hole of theport 45 flows through a communicatinghole 101 formed in thelower plate 43, thecylinder 11, and theupper bearing bracket 60 to an upper muffler chamber M2 described later. The refrigerant is mixed with refrigerant discharged from a hole of aport 65, and flows from arefrigerant outlet 69 into the compressor. Hence, it is configured that the compressed refrigerant always flows through a nettedmaterial 80 in the muffler. - The
end plate 49 shields theshaft hole 44. A lubricantoil flow passage 49a that sucks the lubricant oil from the oil reserving chamber at the bottom of thehousing 2, and supplies the lubricant oil to thecrankshaft 16 in theshaft hole 44 is formed to extend through thisend plate 49. - As shown in
Fig. 2 andFig. 3 , anupper bearing bracket 60 includes a disk-like upper plate (plate member) 61 that abuts against the upper face of thecylinder 11, and aboss 62 extending upward from theupper plate 61. Ashaft hole 63 is formed to extend through the central portion of theupper bearing bracket 60, and thecrankshaft 16 is rotatably supported through thisshaft hole 63 via a bearing (not shown). - A refrigerant discharge port (discharge port) 65 is formed to extend from the upper face to the lower face of the
upper plate 61 at its position facing the cylindricalinner surface 12 of thecylinder 11. - A
peripheral groove 66 having a given height in the vertical direction, and continuously extending in the peripheral direction is formed in an outerperipheral surface 62a of theboss 62. - A
muffler cover 70 in a dome shape is provided on the upper face of theupper plate 61. Themuffler cover 70 has a dome shape whose diameter is gradually reduced upward from anouter periphery 70a thereof, and anaperture 71 is formed on a top end (inner periphery) 70b of themuffler cover 70. The outer periphery of themuffler cover 70 abuts against the upper face of theupper plate 61, and in this state, themuffler cover 70 along with theupper plate 61 are clamped to thecylinder 11 withbolts 67 at plural positions of the outer periphery in the peripheral direction of themuffler cover 70. - A muffler chamber (muffler chamber) M2 continuously extending around the
boss 62 in the peripheral direction is defined by themuffler cover 70, theupper plate 61, and theboss 62. - The
aperture 71 is formed by acylindrical portion 72 extending upward. Thecylindrical portion 72 is disposed to be opposite to theperipheral groove 66 with a distance from the outer periphery of theperipheral groove 66 in a state that themuffler cover 70 is fixed to theupper plate 61. In this manner, an annular gap is generated between thetop end 70b of themuffler cover 70 and theboss 62, and this gap serves as therefrigerant outlet 69 for the refrigerant flowing from the muffler chamber M2. - A mist collecting member (collecting member) 80 made of a steel wool, netted, or porous material is placed in the
peripheral groove 66, and is installed between theperipheral groove 66 and thecylindrical portion 72 of themuffler cover 70. - The
mist collecting member 80 may be previously formed in a cylindrical shape, and is then placed in theperipheral groove 66, or themist collecting member 80 may be previously formed in a web or tape shape, for example, and is then wound around theperipheral groove 66 in the peripheral direction. - As shown in
Fig. 3 , ametallic plate 75 is disposed between theupper plate 61 and themuffler cover 70, for example. Thisplate 75 is provided at its outer periphery with communicatingpassages 76 interconnecting the upper muffler chamber M2 and a space outside the outer periphery of theupper bearing bracket 60. - Each communicating
passage 76 is preferably formed to have a cross sectional area as small as possible so as to generate pressure loss. Hence, in the present embodiment, each communicatingpassage 76 is formed in a groove shape in a side surface of theplate 75. - In the above
rotary compression mechanism 3, the refrigerant gas supplied from the refrigerant piping P1 into thecylinder 11 is compressed by therotor 14 eccentrically rotating in thecylinder 11. The compressed refrigerant is fed from the lowerrefrigerant discharge port 45 into the lower muffler chamber M1, and from the upperrefrigerant discharge port 65 into the upper muffler chamber M2, and is then fed from the lower muffler chamber M1 and from the upper muffler M2 into thehousing 2. Lubricant oil sucked up from the oil reserving chamber at the bottom of thehousing 2 through the lubricantoil flow passage 49a is mixed in the refrigerant that is fed into the lower muffler chamber M1 and the upper muffler chamber M2 in order to lubricate the movable portions of therotary compression mechanism 3. - The refrigerant fed in the
housing 2 flows through thepassages 25 formed in therotor core 23, and is fed through the refrigerant piping P3 at the ceiling portion of thehousing 2 downstream of the refrigerant circuit. - In the upper muffler chamber M2, the refrigerant containing the lubricant oil fed from the
refrigerant discharge port 65 into the upper muffler chamber M2 flows through themist collecting member 80 disposed at therefrigerant outlet 69 between thecylindrical portion 72 of themuffler cover 70 and theboss 62, and is fed into thehousing 2. The lubricant oil contained in the refrigerant is collected when it flows through themist collecting member 80, thereby feeding only the refrigerant into thehousing 2. - The collected lubricant oil flows down on the
upper plate 61 by the gravity, and is pressed with gas pressure of the refrigerant in the upper muffler chamber M2, through the communicatingpassages 76 at the outer periphery of theplate 75 into thehousing 2, and then falls down in the oil reserving chamber at the bottom of thehousing 2. - In the above configuration, the
mist collecting member 80 disposed at therefrigerant outlet 69 communicating from the upper muffler chamber M2 can collect the lubricant oil contained in the refrigerant. Themist collection member 80 is placed in theperipheral groove 66 formed in theboss 62, and is held between theboss 62 and thecylindrical portion 72 of themuffler cover 70. Hence, at the time of assembling the compressor, it is possible to readily and securely position and install themist collecting member 80 at the feeding portion between thecylindrical portion 72 of themuffler cover 70 and theboss 62. Accordingly, thecompressor 1 can be configured to have a simple structure with less components, to be easily assembled, and to be capable of securely collecting the lubricant oil at low cost. - The
plate 75 having the communicatingpassages 76 is disposed in the above configuration; and instead of using thisplate 75, agasket 77 made of a softer material than that of theplate 75, such as a rubber material, a cork material, cupper, and aluminum, may be used as shown inFig. 4 . In this case, each communicatingpassage 78 is preferably configured to have abent portion 78c or a curved portion between aninner end portion 78a of the muffler chamber M2 and anouter end portion 78b of the muffler chamber M2. The communicatingpassage 78 shown inFig. 4 is formed to be cranked, for example. - This configuration hinders the lubricant oil from flowing through the communicating
passage 78 to the outside of the muffler chamber M2, thereby securing pressure loss at this portion so as to maintain a high refrigerant pressure in the muffler chamber M2. - The
gasket 77 made of a softer material than that of theplate 75 facilitates fine machining on each communicatingpassage 78 having such a bent portion. - The
gasket 77 may have a thinner thickness than that of theplate 75. Accordingly, the cross sectional area of each communicatingpassage 78 can be smaller, and the cranked bent portion thereof can prevent pressure leakage of the refrigerant in the upper muffler chamber M2. - As shown in
Fig. 5 , instead of using the communicatingpassages holes 79 may be formed in theupper plate 61 in such a manner that each throughhole 79 extends through theupper plate 61, one end of the throughhole 79 is open to anupper face 61a of theupper plate 61, and the other end thereof is open to an outerperipheral surface 61b of theupper plate 61. - Instead of these holes, there may be provided at portions opposing the
upper plate 61 cut-out portions, grooves, or recessed portions that communicate with the inside and the outside of the muffler chamber M2. - As shown in
Fig. 6 , acompressor 100 having the rotary compression mechanism of the present invention may include ascroll compression mechanism 90 at the upper end portion of thecrankshaft 16 in addition to the aforementioned configuration. Thescroll compression mechanism 90 includes anorbit scroll 91 disposed at the upper end portion of thecrankshaft 16, and a fixedscroll 92 fixed to thehousing 2. Theorbit scroll 91 and the fixedscroll 92 include a disk-like end plate 93 and a disk-like end plate 95, respectively, and also includes ascroll gear 94 and ascroll gear 96 that are integrally formed with anend plate 93 and anend plate 95, respectively. Thisscroll compression mechanism 90 compresses the refrigerant between the scroll gears 94 and 96 that are meshed with each other. - This
compressor 100 includes therotary compression mechanism 3 having the same configuration as aforementioned configuration at low stage, and includes thescroll compression mechanism 90 at high stage so as to compress the refrigerant at two stages. - In the
compressor 100 having such a configuration, therotary compression mechanism 3 having the same configuration as aforementioned configuration can also attain the same advantageous effects. -
- 1
- Compressor
- 2
- Housing
- 3
- Rotary compression mechanism
- 4
- Driving unit
- 11
- Cylinder
- 12
- Cylindrical inner surface
- 13
- Separator
- 14
- Rotor
- 16
- Crankshaft
- 17
- Eccentric axial portion
- 21
- Rotor
- 22
- Stator
- 23
- Rotor core
- 24
- Axial hole
- 25
- Passage
- 28
- Oil separating plate
- 30
- Stator core
- 40
- End bearing
- 41
- Lower bearing bracket
- 43
- Lower plate (plate member)
- 44
- Shaft hole
- 45
- Refrigerant discharge port
- 46
- Boss
- 47
- Outer peripheral wall
- 48
- Groove
- 49
- End plate
- 49a
- Lubricant oil flow passage
- 51
- Plate
- 60
- Upper bearing bracket
- 61
- Upper plate (Plate member)
- 61a
- Upper face
- 61b
- Outer peripheral surface
- 62
- Boss
- 62a
- Outer peripheral surface
- 63
- Shaft hole
- 65
- Refrigerant discharge port (Discharge port)
- 66
- Peripheral groove
- 67
- Bolt
- 69
- Refrigerant outlet
- 70
- Muffler cover
- 70a
- Outer periphery
- 70b
- Top end (inner periphery)
- 71
- Aperture
- 72
- Cylindrical portion
- 75
- Plate
- 76
- Communicating passage
- 77
- Gasket
- 78
- Communicating passage
- 78a
- End portion
- 78b
- End portion
- 78c
- Bent portion
- 79
- Through hole
- 80
- Mist collecting member (Collecting member)
- 90
- Scroll compression mechanism
- 91
- Orbit scroll
- 92
- Fixed scroll
- 100
- Compressor
- 101
- Communicating hole
- M1
- Lower muffler chamber
- M2
- Upper muffler chamber (muffler chamber)
Claims (4)
- A compressor having a rotary compression mechanism (3) including in a housing (2) the rotary compression mechanism (3) for compressing gas, and a driving unit (4) for driving the rotary compression mechanism,
the rotary compression mechanism (3) comprising:a cylinder (11) having a cylindrical inner surface (12);a crankshaft (16) extending through the cylinder, being rotationally driven around a central axis of the cylinder by the driving unit, and having an eccentric axial portion (17) eccentric to the central axis of the cylinder;plate members (43, 61) for covering apertures at both end portions of the cylinder;a discharge port (45, 65) formed in at least one of the plate members, and communicating with an inside of the cylinder;a boss (46, 62) in a cylindrical shape integrally disposed with the plate member in which the discharge port is formed, and rotatably supporting the crankshaft that extends through the boss;a muffler cover (70) whose outer periphery abuts against the plate member, and whose inner periphery (70b) opposes an outer peripheral surface of the boss so as to form a muffler chamber into which refrigerant is fed from the cylinder through the discharge port;a refrigerant outlet (69) formed between the inner periphery (70b) of the muffler cover (70) and the outer peripheral surface of the boss, the refrigerant outlet feeding the refrigerant from the muffler chamber into the housing;characterized in that the rotary compression mechanism (3) further comprises a collecting member (80) disposed at the refrigerant outlet (69) so as to collect lubricant oil contained in the refrigerant,a peripheral groove (66) is formed in the boss (62) such that the peripheral groove continuously extends in a peripheral direction of the boss at a position opposing the inner periphery of the muffler cover, andthe collecting member (80) is placed in the peripheral groove (66), and is disposed between the inner periphery (70b) of the muffler cover and the outer peripheral surface of the boss (62). - The compressor having a rotary compression mechanism according to claim 1, wherein
communicating passages (76) are formed between the outer periphery (70a) of the muffler cover (70) and the plate member (61) so as to communicate with an inside and an outside of the muffler chamber. - The compressor having a rotary compression mechanism according to claim 2, wherein
each communicating passage (76) has a bent or curved portion (78c) between an inner end portion of the muffler chamber and an outer end portion of the muffler chamber. - The compressor having a rotary compression mechanism according to any one of claim 1 to claim 3, further comprising
a scroll compression mechanism (90) including: a fixed scroll (92) fixed to the housing; and an orbit scroll (91) eccentrically orbiting relative to the fixed scroll through the crankshaft (16).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012254479A JP6109542B2 (en) | 2012-11-20 | 2012-11-20 | Compressor having rotary compression mechanism |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2733306A2 EP2733306A2 (en) | 2014-05-21 |
EP2733306A3 EP2733306A3 (en) | 2017-07-05 |
EP2733306B1 true EP2733306B1 (en) | 2018-12-19 |
Family
ID=49485566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13190098.7A Active EP2733306B1 (en) | 2012-11-20 | 2013-10-24 | Compressor having rotary compression mechanism with a muffler cover |
Country Status (2)
Country | Link |
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EP (1) | EP2733306B1 (en) |
JP (1) | JP6109542B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2017141343A1 (en) * | 2016-02-16 | 2017-08-24 | 三菱電機株式会社 | Compressor |
CN107605739B (en) * | 2017-10-23 | 2023-10-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Flange assembly, compressor and air conditioner |
KR102406171B1 (en) * | 2017-11-09 | 2022-06-10 | 삼성전자주식회사 | Compressor |
CN108087273B (en) * | 2017-11-30 | 2020-02-07 | 珠海格力电器股份有限公司 | Compressor and air conditioner with same |
CN110296080A (en) * | 2019-07-24 | 2019-10-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump assembly and compressor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6133996U (en) * | 1984-07-31 | 1986-03-01 | ダイキン工業株式会社 | compressor |
JPH04134196A (en) | 1990-09-27 | 1992-05-08 | Daikin Ind Ltd | Hermetic compressor |
JP3027486B2 (en) * | 1993-02-10 | 2000-04-04 | 松下冷機株式会社 | Refrigeration equipment and refrigerant compressor |
JP2006283592A (en) * | 2005-03-31 | 2006-10-19 | Daikin Ind Ltd | Fluid machine |
JP5232595B2 (en) * | 2008-10-24 | 2013-07-10 | 三菱重工業株式会社 | Multistage compressor |
-
2012
- 2012-11-20 JP JP2012254479A patent/JP6109542B2/en active Active
-
2013
- 2013-10-24 EP EP13190098.7A patent/EP2733306B1/en active Active
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Also Published As
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EP2733306A2 (en) | 2014-05-21 |
JP2014101811A (en) | 2014-06-05 |
JP6109542B2 (en) | 2017-04-05 |
EP2733306A3 (en) | 2017-07-05 |
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