EP2441959A1 - Compresseur à spirales - Google Patents
Compresseur à spirales Download PDFInfo
- Publication number
- EP2441959A1 EP2441959A1 EP11184562A EP11184562A EP2441959A1 EP 2441959 A1 EP2441959 A1 EP 2441959A1 EP 11184562 A EP11184562 A EP 11184562A EP 11184562 A EP11184562 A EP 11184562A EP 2441959 A1 EP2441959 A1 EP 2441959A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- scroll compressor
- fluid
- wall
- fluid channel
- scroll
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract description 105
- 230000006835 compression Effects 0.000 claims abstract description 55
- 238000007906 compression Methods 0.000 claims abstract description 55
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 9
- 239000001569 carbon dioxide Substances 0.000 claims description 9
- 230000006866 deterioration Effects 0.000 description 16
- 230000000994 depressogenic effect Effects 0.000 description 8
- 239000003507 refrigerant Substances 0.000 description 5
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- 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
- 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
Definitions
- the present invention relates to a scroll compressor.
- a scroll compressor compresses fluid in a compression chamber by combining spiral walls of a fixed scroll and an orbiting scroll while shifting phases of the walls, and causing the orbiting scroll to revolve, and gradually decreasing the volume of a pair of compression chambers formed between the respective walls.
- an external wall is formed integrally with a fixed scroll so as to surround the periphery of a wall of a fixed scroll.
- the scroll compressor includes a fluid channel for introducing fluid into the compression chamber, the fluid channel penetrating the external wall.
- the fluid channel is formed by being notched in the external wall, and is provided to form a pair corresponding to respective compression chambers, and face each other with a center of an involute base circle of the spiral wall being put therebetween. Furthermore, an opening of the fluid channel is directed towards the center of the base circle.
- Patent Literature 1 Japanese Patent Application Laid-open No. 2007-255191
- the present invention has been achieved to solve the above problems, and an object of the present invention is to provide a scroll compressor that can improve the strength of a fixed scroll thereof and can suppress deterioration of the compression performance thereof.
- a scroll compressor includes a fixed scroll in which a spiral wall is provided on an inner face of an end plate, an external wall is provided integrally with the end plate so as to surround a periphery of the wall, and a pair of fluid channels penetrating the external wall is provided.
- the fluid channel is arranged such that a centerline thereof deviates from a center of an involute base circle of the wall.
- the centerline of the fluid channel is a normal passing through a center of a straight line connecting the closest (narrowest) parts of both opposing side wall faces of the fluid channels.
- the direction of the opening of the fluid channel is formed to be deviated from the center of the base circle. That is, the direction of the fluid channel (the flow direction of the fluid) is not arranged linearly with the center of the base circle being put therebetween. Therefore, the external wall in which the fluid channel is not formed provides additional strength, thereby avoiding a situation in which the fixed scroll bends. Consequently, any damage or compression leakage does not occur. As a result, the strength of the fixed scroll can be improved, and deterioration of the compression performance of the scroll compressor can be suppressed.
- an opening of the fluid channel is arranged towards an intake of a compression chamber constituted by the wall.
- the fluid channel is formed with the direction thereof (the flow direction of the fluid) being directed towards the intake of the compression chamber. Therefore, the fluid flows towards the intake of the compression chamber, along with the direction of the fluid channel, thereby reducing a flow pressure loss. As a result, deterioration of the compression performance of the scroll compressor can be further suppressed.
- opposing side wall faces of the fluid channel are provided parallel to each other.
- the fluid flows smoothly towards the fluid channel and the flow pressure loss can be reduced.
- deterioration of the compression performance of the scroll compressor can be further suppressed.
- respective centerlines of the respective fluid channels are provided parallel to each other.
- the direction of the opening of each fluid channel is formed to be deviated from each other and the direction of the fluid channel (the flow direction of the fluid) is not arranged linearly with the center of the base circle being put therebetween. Therefore, the external wall in which the fluid channel is not formed provides additional strength, thereby avoiding a situation in which the fixed scroll bends. Consequently, any damage or compression leakage does not occur. As a result, the strength of the fixed scroll can be improved, and deterioration of the compression performance of the scroll compressor can be suppressed.
- the centerlines of the fluid channels are provided parallel to a tangent to an external end of the wall.
- the direction (the flow direction of the fluid) of the fluid channel is formed linearly towards the intake of the compression chamber. Therefore, the fluid flows linearly towards the intake of the compression chamber along with the direction of the fluid channel, and the flow pressure loss can be reduced most effectively. As a result, deterioration of the compression performance of the scroll compressor can be most suppressed.
- a gap between opposing side wall faces of the fluid channels is formed to become wider towards inside of the external wall.
- an opening width of the fluid channel is formed larger than an opening width of the intake of the compression chamber, constituted by the walls.
- carbon dioxide is used as fluid to be compressed.
- carbon dioxide to a fluorocarbon refrigerant is preferable because it has less negative influence on the environment. Furthermore, because carbon dioxide provides a pressure about three times as high as that of a fluorocarbon refrigerant, it is required to improve the strength of a fixed scroll, and thus carbon dioxide is preferable for the scroll compressor according to the present invention.
- the strength of the fixed scroll of the scroll compressor can be improved and deterioration of the compression performance thereof can be suppressed.
- FIG. 1 is a schematic cross-sectional view of a scroll compressor according to an embodiment of the present invention.
- a scroll compressor 1 includes a housing 2, a fixed scroll 3, an orbiting scroll 4, and a rotating shaft 5.
- the housing 2 is a sealed container having the fixed scroll 3, the orbiting scroll 4 or the like arranged therein.
- a discharger cover 7, a suction pipe (not shown), a discharge pipe 8, and a frame 9 are provided in the housing 2.
- the discharger cover 7 separates the inside of the housing 2 into a high-pressure chamber HR and a low-pressure chamber LR.
- the suction pipe guides fluid from outside into the low-pressure chamber LR.
- the discharge pipe 8 guides fluid from the high-pressure chamber HR to outside.
- the frame 9 supports the fixed scroll 3 and the orbiting scroll 4.
- the rotating shaft 5 transmits a rotating and driving force of a motor (not shown) provided in a lower part inside the housing 2 to the orbiting scroll 4.
- the rotating shaft 5 is rotatably supported substantially vertically in the housing 2.
- An eccentric pin 5a that drives the orbiting scroll 4 to revolve is provided at an upper end of the rotating shaft 5.
- the eccentric pin 5a is a columnar portion extending upward from an end face of the rotating shaft 5 at a position decentered from the center of rotation of the rotating shaft 5 in the end face thereof by a revolution radius r of the orbiting scroll 4.
- the fixed scroll 3 and the orbiting scroll 4 compress fluid having flown into the low-pressure chamber LR of the housing 2, and discharge the fluid to the high-pressure chamber HR.
- the fixed scroll 3 is fixed to the frame 9 in the housing 2, and a spiral fixed-side wall 32 is formed on an inner face (the lower face in FIG. 1 ) of a fixed-side end plate 31.
- a discharge hole 33 is formed in the middle of the fixed-side end plate 31. The discharge hole 33 communicates with an opening 7a provided in the discharger cover 7, and is opened or closed together with the opening 7a by a discharge reed valve V provided in the discharge cover 7.
- the orbiting scroll 4 includes a spiral movable-side wall 42 formed on an inner face (the upper face in FIG. 1 ) of a movable-side end plate 41 facing the inner face of the fixed-side end plate 31.
- a compression chamber P partitioned by the respective end plates 31 and 41 and the respective walls 32 and 42 is formed.
- the orbiting scroll 4 includes a boss 43 formed on an external face (the lower face in FIG. 1 ) of the movable-side end plate 41, into which the eccentric pin 5a provided at the upper end of the rotating shaft 5 is inserted.
- the orbiting scroll 4 is revolved, while rotation thereof is blocked by an annular rotation blocking member 44 arranged between the frame 9 fixed to the housing 2 and the orbiting scroll 4 at the underneath thereof.
- FIGS. 2 to 5 are cross-sectional views along a line I-I in FIG. 1 .
- the fixed scroll 3 includes an external wall 34 formed integrally with the end plate 31 to surround the periphery of the spiral wall 32.
- the fixed scroll 3 according to the present embodiment includes a depressed portion 35 constituting the compression chamber P in a central part of the inner face of the end plate 31, and the wall 32 is formed in the depressed portion 35.
- the wall 42 of the orbiting scroll 4 is inserted into the depressed portion 35.
- the external wall 34 is formed to include a stepped portion around the depressed portion 35.
- Bolts 10 (see FIG. 1 ) for fixing the fixed scroll 3 to the frame 9 penetrate the external wall 34.
- a pair of fluid channels 36 penetrating the external wall 34 is formed in the external wall 34.
- the fluid channel 36 is formed by being notched from outside of the external wall 34 to the depressed portion 35, so as to introduce fluid into the compression chamber P.
- a centerline S of the fluid channel 36 is arranged to be deviated from a center O of an involute base circle.
- the centerline S of the fluid channel 36 is a normal passing through a center of a straight line A connecting the closest (narrowest) parts of both of the opposing side wall faces 36a of the fluid channel 36.
- FIG. 2 depicts an embodiment in which both of the side wall faces 36a of the fluid channel 36 are formed parallel to each other.
- FIG. 3 depicts an embodiment in which both of the side wall faces 36a of the fluid channel 36 are not parallel to each other, and at least one of the side wall faces 36a is inclined so that an opening width is enlarged towards the inside (towards the compression chamber P).
- the centerline S is arranged to be deviated from the center O of the involute base circle of the wall 32.
- the centerline S corresponds to a flow direction of fluid passing through the fluid channel 36. Because the centerline S of the fluid channel 36 is arranged to be deviated from the center O of the involute base circle of the wall 32, the direction of the opening of the fluid channel 36 is formed to be deviated from the center O of the base circle.
- the direction of the fluid channel 36 (the flow direction of fluid) is not arranged linearly with the center O of the base circle being put therebetween. Therefore, the external wall 34 where the fluid channel 36 is not formed and the stepped portion around the depressed portion 35 provide additional strength, thereby avoiding a situation in which the fixed scroll 3 bends. Consequently, excessive contact between the ends of the walls 32 and 42 of the respective scrolls 3 and 4 or insufficient contact therebetween does not occur, and thus any damage of the scrolls 3 and 4 or compression leakage does not occur. As a result, according to the scroll compressor 1 of the present embodiment, the strength of the fixed scroll 3 can be improved, and deterioration of the compression performance of the scroll compressor can be suppressed.
- the fluid channel 36 is arranged with the opening being directed towards an intake of the compression chamber P constituted by the walls 32 and 42.
- the fluid channel 36 is formed so that the side wall faces 36a extend towards the intake of the compression chamber P.
- the intake of the compression chamber P is formed inside of external ends of the walls 32 and 42. That is, the fluid channel 36 is formed with the direction thereof (the flow direction of fluid) being directed towards the intake of the compression chamber P. Therefore, the fluid flows towards the intake of the compression chamber P along with the direction of the fluid channel 36, thereby decreasing the flow pressure loss. As a result, deterioration of the compression performance of the scroll compressor can be further suppressed.
- the opposing side wall faces 36a are provided parallel to each other. Therefore, fluid flows smoothly towards the fluid channel 36, thereby decreasing the flow pressure loss. As a result, deterioration of the compression performance of the scroll compressor can be further suppressed.
- respective centerlines S of the fluid channels 36 are provided parallel to each other. That is, because the directions of the openings of the respective fluid channels 36 are formed to be deviated from each other, the direction of the fluid channel 36 (the flow direction of fluid) is not arranged linearly with the center O of the base circle being put therebetween. Therefore, the external wall 34 where the fluid channel 36 is not formed and the stepped portion around the depressed portion 35 provide additional strength, thereby avoiding a situation in which the fixed scroll 3 bends. Consequently, excessive contact between the ends of the walls 32 and 42 of the respective scrolls 3 and 4 or insufficient contact therebetween does not occur, and thus any damage of the scrolls 3 and 4 or compression leakage does not occur. As a result, according to the scroll compressor 1 of the present embodiment, the strength of the fixed scroll 3 can be improved, and deterioration of the compression performance of the scroll compressor can be suppressed.
- the centerlines S of the fluid channels 36 are provided parallel to a tangent T to the external ends of the walls 32 and 42. That is, the fluid channel 36 is formed linearly with the direction thereof (the flow direction of fluid) being directed towards the intake of the compression chamber P. Therefore, because the fluid flows towards the intake of the compression chamber P along with the direction of the fluid channel 36, the flow pressure loss can be reduced most effectively. As a result, deterioration of the compression performance of the scroll compressor can be most suppressed.
- the fluid channel 36 is formed such that a gap between the opposing side wall faces 36a becomes wider towards the inside of the external wall 34 (towards the compression chamber P). Consequently, the resistance of fluid immediately after passing through the fluid channel 36 is reduced, thereby reducing the flow pressure loss. As a result, deterioration of the compression performance of the scroll compressor can be further suppressed.
- an opening width A of the fluid channel 36 is formed larger than an opening width B of the intake of the compression chamber P, which is constituted by the walls 32 and 42. Consequently, fluid can be reliably introduced into the intake. As a result, deterioration of the compression performance of the scroll compressor can be further suppressed.
- the opening width A of the fluid channel 36 is the closest (narrowest) part of both opposing side wall faces 36a of the fluid channel 36, and corresponds to a length of the straight line A connecting both of the side wall faces 36a.
- the scroll compressor 1 according to the present embodiment is suitable for using carbon dioxide as its fluid (refrigerant).
- Carbon dioxide is preferable for the fluorocarbon refrigerant because it causes less negative influence on the environment.
- carbon dioxide provides a pressure about three times as high as that of the fluorocarbon refrigerant, it is required to improve the strength of the fixed scroll, and thus carbon dioxide is preferable for the scroll compressor 1 according to the present embodiment.
- the scroll compressor according to the present invention is suitable for improving the strength of the fixed scroll thereof and suppressing the compression performance thereof.
- Reference Signs List
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010229779A JP5622514B2 (ja) | 2010-10-12 | 2010-10-12 | スクロール圧縮機 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2441959A1 true EP2441959A1 (fr) | 2012-04-18 |
EP2441959B1 EP2441959B1 (fr) | 2017-03-01 |
Family
ID=44759573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11184562.4A Active EP2441959B1 (fr) | 2010-10-12 | 2011-10-10 | Compresseur à spirales |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2441959B1 (fr) |
JP (1) | JP5622514B2 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6116333B2 (ja) * | 2013-04-22 | 2017-04-19 | 三菱電機株式会社 | スクロール圧縮機 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614643A1 (de) * | 1985-05-16 | 1986-11-20 | Mitsubishi Denki K.K., Tokio/Tokyo | Stroemungsmaschine der spiralbauart |
US6364643B1 (en) * | 2000-11-10 | 2002-04-02 | Scroll Technologies | Scroll compressor with dual suction passages which merge into suction path |
US20060245967A1 (en) * | 2005-05-02 | 2006-11-02 | Anil Gopinathan | Suction baffle for scroll compressors |
JP2007255191A (ja) | 2006-03-20 | 2007-10-04 | Mitsubishi Heavy Ind Ltd | スクロール圧縮機 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07269474A (ja) * | 1994-03-29 | 1995-10-17 | Sanyo Electric Co Ltd | 密閉型圧縮機 |
JP2005240636A (ja) * | 2004-02-25 | 2005-09-08 | Mitsubishi Heavy Ind Ltd | 横置きスクロール圧縮機 |
JP2008002287A (ja) * | 2006-06-20 | 2008-01-10 | Matsushita Electric Ind Co Ltd | スクロール圧縮機 |
JP2010048226A (ja) * | 2008-08-25 | 2010-03-04 | Sanden Corp | スクロール型流体機械 |
-
2010
- 2010-10-12 JP JP2010229779A patent/JP5622514B2/ja active Active
-
2011
- 2011-10-10 EP EP11184562.4A patent/EP2441959B1/fr active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614643A1 (de) * | 1985-05-16 | 1986-11-20 | Mitsubishi Denki K.K., Tokio/Tokyo | Stroemungsmaschine der spiralbauart |
US6364643B1 (en) * | 2000-11-10 | 2002-04-02 | Scroll Technologies | Scroll compressor with dual suction passages which merge into suction path |
US20060245967A1 (en) * | 2005-05-02 | 2006-11-02 | Anil Gopinathan | Suction baffle for scroll compressors |
JP2007255191A (ja) | 2006-03-20 | 2007-10-04 | Mitsubishi Heavy Ind Ltd | スクロール圧縮機 |
Also Published As
Publication number | Publication date |
---|---|
JP5622514B2 (ja) | 2014-11-12 |
EP2441959B1 (fr) | 2017-03-01 |
JP2012082754A (ja) | 2012-04-26 |
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