CA1305688C - Scroll type compressor - Google Patents
Scroll type compressorInfo
- Publication number
- CA1305688C CA1305688C CA000561812A CA561812A CA1305688C CA 1305688 C CA1305688 C CA 1305688C CA 000561812 A CA000561812 A CA 000561812A CA 561812 A CA561812 A CA 561812A CA 1305688 C CA1305688 C CA 1305688C
- Authority
- CA
- Canada
- Prior art keywords
- shell
- center block
- housing
- scroll
- hermetically sealed
- 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.)
- Expired - Lifetime
Links
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
-
- 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
-
- 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
- F04C2240/00—Components
- F04C2240/60—Shafts
- F04C2240/603—Shafts with internal channels for fluid distribution, e.g. hollow shaft
Abstract
ABSTRACT OF THE DISCLOSURE
An hermetic type scroll compressor is disclosed which includes first and second cup shaped casings and a center block therebetween.
The first cup shaped casing is provided with a fixed scroll affixed within the first cup shaped casing, orbiting scroll interfitted at an angular and radial offset with the fixed scroll, rotation preventing device disposed between the orbiting scroll and the center block. The second cup shaped casing is provided with a drive mechanism. The first cup shaped casing and the second cup shaped casing are releasably and hermetically secured through the center block thereby enabling disassembly, reassembly and independent inspection of the hermetic type scroll compressor components.
An hermetic type scroll compressor is disclosed which includes first and second cup shaped casings and a center block therebetween.
The first cup shaped casing is provided with a fixed scroll affixed within the first cup shaped casing, orbiting scroll interfitted at an angular and radial offset with the fixed scroll, rotation preventing device disposed between the orbiting scroll and the center block. The second cup shaped casing is provided with a drive mechanism. The first cup shaped casing and the second cup shaped casing are releasably and hermetically secured through the center block thereby enabling disassembly, reassembly and independent inspection of the hermetic type scroll compressor components.
Description
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SCROLL TYPE COMPRESSOR
BACKGROUND OF THE INVENTION
This invention relates to a scroll type compressor and more particularly, to a motor driven scroll compressor having the compres-sion and drive mechanisms within a hermetically sealed container.
Scroll type fluid displacement apparatus are well known in the prior art. For example, U.S. Patent No. 801,182 issued to Creux dis-clo~ses such an apparatus which includes two scrolls, each having a circular end plate and a spiroidal or involute spiral element. The scrolls are maintained angularly and radially offset so that both spiral elements interfit to form a plurality OI line contacts between their spiral curved surfaces to thereby seal off and define at least one pair of fluid pockets. The relative orbital rnotion of the two scrolls shifts the line contacts along the spiral curved surfaces and~ as a result, the volume of the fluid pockets increases or decreases, dependent on the dlrection of ~he orbital motion. Thus, a scroll type fluid displacement apparatus may be used to compress, expand or pump fluids.
Furthermore, U.S. Patent No. 4,560,330 for example, discloses such a h0rmetic type scroll compressor which includes a fixed scroll, orbiting scroll, rotation preventing device and driving mechanism in one sealed container.
In this hermetic type scroll compressor, the essentially insepa-rable container is sealed by welding or other means so that leakage of refrigerant gas from the container is completely prevented.
While the above mentioned hermetic type scroll compressor prevents leakage of refrigerant gas from the container, this hermetic type SCFOll compressor can hardly be disassembled and reassembled for inspection, and repa~r or exchange of parts.
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'~ 2 SUMMARY OF THE INVENTION
It is an object of an aspect of this invention to improve hermetic scroll compressor container to facilitate disassembling and reassembliny of a hermetic type scroll compressor by releasably and hermetically securing a first casing and a second casing through the center block to form the. hermetically sealed container.
It is an object of an aspect of this invention to improve hermetic type scroll compressor manufacturing and maintenance efficiencies by assembling a first housin~ and a second housing of a hermetic type scroll compressor separately so that the first housing, second housing and components therein can be disassembled, reassembled and inspected independently.
It is an object of an aspect of this invention to provide a releasably hermetic securing mechanism which also provides alignment means for aligning appropriate components within the first casing with appropriate components within the second casing.
Various aspects of the invention are as follows:
In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a ~irst wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pock~ts, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion whereby khe volume of the fluid pockets changes during orbital motion to compress the fluid in the pockets, the improvement comprising:
:~3~
~ 2a said housing including a first shell, a separate second shell ancl a center block, said center block being formed as a single piece element having a peripheral portion extending around the periphery of the compressor and an interior portion for rotatably supporting a portion of said drive mechanism, said peripheral portion including fastening means for releasably and hermetically securing said first shell to a ~irst side of said peripheral portion of said center block and said second shell to a second side of said peripheral portion of said center block, at least a portion of said fastening means securing one of said first and second shells to said center block element being disposed within the other of said first and second she:Lls.
In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate Prom which a first wrap extends into the interior of said housing, an orbiting sc-roll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contac-ts which define at least one pair of sealed off fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion whereby the volume of the fluid pockets changes during orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first shell, a separate second shell and a center block, said center block having a peripheral portion extending around the periphery of the compressor and an .' ~ 2b interior portion located inwardly of the peripheral portion, said first shell being releasably and hermetically secured to a first side of said peripheral portion of said center block, said second shell begin releasably and hermetically secured to a second side of said peripheral portion of said canter block, a portion of said rotation preventing means being connected to a first side of said ~0 interior portion of said center block, one end portion of said drive shaft being rotatably supported in a second opposite side of said interior portion of said center block, a rear bearing support block releasably connected to said second side of said interior portion of said center block, the other end portion of said drive shaft being supported by said rear bearing support block.
In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality o~ line contacts which de~ine at least one pair of sealed off fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting s~.roll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion whereby the volume of tha fluid pockets changes during orbital motion to comprass the fluid in the pocXets, the improvement comprising:
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~ 2c said housing includ:ing a first shell and a separate second shell, said first shell having a first center block disposed therein, said first center bloc~ having a peripheral portion extending around the periphery of the compressor and radially beyond said first shell, said first shell being releasably and hermetically secured to a first side of said peripheral portion of said first center block, said second shell including a second center block dispo~ed therein for supporting said driving mechanism, said second shell being releasably and hermetically secured to a second side of said peripheral portion of said first center block.
In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extencls, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair o~ sealed off fluid pockets, a driving mechanism including a motor su~ported in said housing, said driving mechanism bei.ng operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion thereof/ whereby the volume of the fluid pockets changes during said orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first casing, a separate second casing and a center block, said first casing housing said fixed scroll, said orbiting scroll and said rotation preventing means, said second casing housing said driving mechanism which further includes a drive shaft;
A~
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~ 2d said center block supporting said driving mechanism and orbiting scroll, said center block including a peripheral portion extending radially beyond said first casing and around the periphery of the housing, said first casing being releasably and hermetically secured to a flrst side of said peripheral portion and said second casing being releasably and hermetically secured to a second side of said peripheral portion in a manner such that a portion of said center block peripheral portion forms part of the housing outer surface.
In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior o~ said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality o~ line contacts which define at least one pair of sealed of~ fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to e~fect the orbital motion o~
said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion thereof~ whereby the volume of the fluid pockets changes during said orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first casing and a second casing, said first casing housing said fixed scroll, said orbiting scroll and said rotation preventing means, said second casing housing said driving mechanism which ~urther includes a drive sha~t, wherein said first and second casings are releasably secured to a first center block to form sa.id hermetically sealed housing;
. .
13~561 38 ~ 2e said first center block being disposed within said first casing, said first center block having a front surface and a rear surface, said rear surface being connected to a portion of said rotation preventing means;
a second center block being disposed within said second casing and rotatably supporting one end of said drive shaft, said second center block having a front surface facing said first center block front surface; and alignment means formed on engagi.ng portions of said facing surfaces of said first and second center blocks for aligning said drive shaft with said orbiting scroll.
In a s¢roll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly di~posed within said housing and having an end plate from which a first wrap axtends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap ~xtends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pockets, a driving ; mechanism including a motor supported in said housing, said driving mechanism being operatively connected to ~: said orbiting scroll to effect the orbital motion of ~:~ said orbiting scroll, rotation preventing means for ; : preventing the rotation of sald orbiting scroll during orbital motion whereby the volume of the fluid pockets changes during orbital motion to compress the fluid in : the pockets, the improvement comprising-said housing including a first shell, a separate second shell and a center hlock, said : center block comprising a first block and a second : 35 separate block, said first block having a peripheral portion extending around the periphery of the compressor, said peripheral portion ~''''~ .
~ ' ' ' , .
`
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including fastening means for releasably and hermetically securing said first shell to a first side of said peripheral portion of said center block and said second shell to a second side of a peripheral portion of said center block, at least a portion o* said fastening means securing one of said first and second shells to said peripheral portion of the center ~lock being disposed within the other of said ~irst and second shells, said second block having an interior portion of rotatably supporting a portion of said drive mechanism.
A hermetic type scroll compressor, according to one embodiment of this invention, includes first and second cup shaped casings and a center block therebetween. A
fixed scroll is fixedly disposed in the first cup shaped casing and has a circular en~ plate from which a first wrap extends. An orbiting scroll has a circular end plate from which a second wrap extends. The first and second wraps interfit at an angular and radial offset to form a plurality of line contacts to define at least one pair of sealed off fluid pockets. A rotation pr~venting device is disposed between the orbiting ~croll and the center block which is connected to the first and second cup shaped casings. A driving mechanism having a motor driven drive shaft is disposed in the second cup shaped casing and operatively connects to the orbiting scroll to effect the orbital motion of the orbiting scroll by rotation of a drive shaft while rotation of the orbiting scroll is prevented by a rotation preventing device. As a result, the fluid pockets shift along the spiral curved surfaces of the wraps which change the volume of the fluid pockets.
According to an aspect of the present invention, the first housing having the first cup shaped casing, fixed scroll, orbiting scroll and rotation ",~.
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preventing device is built on the center block. The second housing having ~he drive shaft, motor and second cup shaped casing is also built on the center block. The first cup shaped casing and the second ¢up shaped casing are releasably and hermetically secured to each other through the center block.
Further objects, features and other aspects of this invention will be understood from the detailed description of the preferred embodiment of this invention with reference to the annexed drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a vertical longitudinal sectional view of a hermetic type scroll compressor in accordance with one embodiment of this inven~ion.
Figure 2 is a vertical longitudinal sectional view of a hermetic type scroll compressor in accordance with another embodiment of this invention.
DETAILED DESCRIPTION OF THE PREFE:RRED EMBODIMENT
Figure 1 depicts a hermetic type scroll refrigerant compressor 1 in accordance with a first embodiment of the present invention.
Compressor 1 includes first cup shaped casing 10, second cup shaped casing 20 and center block 30 which is a~tached to first cup shaped casing 10 and second cup shaped casing 20. Opening or bore 31 is formed in the center of center bloc~ 30 for receiving drive shaft 11.
Radial projection 301 is formed in the inner peripheral surface of opening 31. Drive shaft 11 is rotatably supported in opening 31 by bearing 33. Bearing 33 firmly fits in opening 31. Outer ring 33a of bearing 33 is s~opped at a rear end surface of radial projection 301.
Nut 34 is screwed on drive shaft 11 and faces one end surface of inner ring 33b of bearing 33. Flange 111 loca~ed at one end of drive shaft 11 faces the other end surface of inner ring 33b of bearing 33. Axial motion of drive shaft 11 is thereby prevented by flange 111 and nut 34. Rotor 40a of motor 40 surrounds drive shaft 11. Rotor 40a may be firmly inserted over drive shaft 11.
F~xed scroll 50 includes circular end plate 51 and wrap or spiral elements 52 affixed to or extending from one end surface of end plate i~L3~
51. Fixed scroll 50 is fixed within the inner chamber of fi~t cup shaped casing 10 by screws 11 screwed into end plate 51 irom outside of first cup shaped casing 10. Seal ring llb is located between an inner surface of screw flange lla and the outer end surface of first cup shaped casing 10 to seal the connection therebetween. Circular end plate 51 of fixed scroll 50 partitions the inner chamber of first cup shaped casing 10 into two chambers, such as front chamber 1 and rear chamber 19.
Orbiting scroll 60 is disposed at the rear end side of center block 30 through later mentioned rotation preventing/thrust bearing device 45. Orbiting scroll 60 includes circular end plate 61 and wrap or spiral element 62 affixed to or extending from one end surface of circular end plate 61. Annular projection 16 is formed opposite the surface of circular end plate 61 from which spiral element 62 extends.
Bearing 16d is disposed within the inner peripheral wall of the annular projection lB.
~ 3ushing 115 is attached to one end of drive shaft 11 at a radial offset through pin member 115b. Bushing 115 is inserted into annular projection 16 of orbiting scroll 60. Orbiting scroll 60 is rotatably sup-ported by bushing 115 through bearing 16d placed on the outer periph-eral surface of bushing 115.
Rotation preventing/thrust bearing device 45 is placed between the rear end surface of center block 30 and the end surface of circu-lar end plate 61. Rotation preventing/thrust bearing device 45 includes fixed ring ~51 attached on the axial end surface of annular projection 302 which is formed in the rear end surface of center block 30, orbiting ring 452 attached on the end surface of circular end plate 61, and a plurality of bearing elements, such as balls 453, placed between pockets 451a, 452a îormed by rings 451, 452. The rotation of orbiting scroll 60 during orbital motion is prevented by the interaction of balls 453 with rings 451, 452. Also, the axial thrust load from orbiting scroll 60 is supported on center block 30 through balls 453.
While orbiting scroll 60 orbits, the rotation of orbiting scroll 60 is prevented by rotation preventing/thrust bearing device 45.
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In this situation, spiral element 62 of orbiting scroll 60 interfits spiral element 52 of fixed scroll 50 at an annular offset of 180 and at a predetermined radial offset. Spiral elements 62 and 52 define at least one pair of seale~ off fluid pockets between their interfitting surfaces.
Radial projection 303 formed in the outer peripheral surface of center block 30 is fixed to the axial end surface of first cup shaped casing 10 by screws 12. Seal ring 12a is disposed within circumferen-tial groove 12b of annular projection 302 to form a seal between the inner wall of îirst cup shaped casing 10 and the outer peripheral sur-face of annular projection 302.
The other end of drive shaft 11 is also rotatably supported by supporting block (rear bearing unit) 70 through bearing 71. Stator 40b of motor 40 is held firmly between center block 30 and rear bearing unit ~0. Rear bearing unit ~Q is fixed to center block 30 by screws 13 screwed into center block 30 from the rear end of rear bearing unit 70. Therefore, stator 40b is held firmly between center block 30 and rear bearing unit 70. The inner peripheral surface of stator 40b and the outer peripheral surface of rotor 40a face each other.
Rear bearing unit 7n and motor 40 are covered by second cup shaped casing 20. Flange 21a formed at opening end 21 of second cup shaped casing 20 is fixed to radial projection 303 of center block 30 by screws 14. Seal ring 14a ~s disposed within a circular groove 14b of flange 21a to form a seal between the front end surface of radial pro-jection 303 and an axial end surface of flange 21a.
Wires 411 from stator 40h are connected with terminals 412a.
Terminals 412a are connected to an external electrical source (not shown) through a switch (also not sho~rn). Hermetic seal base 412 is insulated from terminaLis 412a and fixed to projection 413 which is formed on side surface of second cup shaped casing 20 by screws 414.
Seal ring 414a is disposed within a circular groove 414b of projection 413 to form a seal between the rear end surface of hermetic seal base 412 and the axial end surface of projection 413.
By turning on the motor 40, a magnetic field of stator 40b is generated so that rotor 40a begins rotation, thereby rotating drive shaft 11. This rotation is transferred to orbiting scroll 60 through bushing 115. Orbiting scroll 60 begins orbital motion due to rotation prevention/thrust bearing device 45O Refrigerant gas is introduced to inner chamber 25 of second cup shaped casing 21 through inlet port 20c which is formed at the side wall of second cup shaped casing 20, and flows through front chamber 18 of first cup shaped casing 10 through bearing 33 and then through rotation preventing/thrust bear-ing device 45. The refrigerant gas in the front chamber is taken into the sealed fluid pockets between the fixed scroll and orbiting scroll, then moves ~oward the cen~er of the spiral wraps during the orbital motion of the orbiting scroll with a resultant volume reduction and compression, and is discharged to rear chamber 19 as through hole 56 and one-way valve 56c. Discharged gas in the rear chamber then flows to an external fluid circuit (not shown) through outlet port 10c.
Referring to Figure 2, hermetic type scroll refrigerant com-pressor 1 is shown in accordance wi-th another embodiment of the present invention. The same construction is accorded like numerals as that shown in Figure 1. The description of that constructions is substantially omitted to simplify the description herein.
Orbiting scroll 60 interfits fixed scroll 50. Annular projection 16 is formed opposite the surface of circular end plate 61 from which spiral element 62 is extended. Bearing 16d is disposed within the inner peripheral wall of the annular projection 16. A first center block 310 having central opening or bore 311 is disposed adjacent to rotation preventing/thrust bearing device 45. The first center block 310 is releasably and hermetically secured fixed to an axial end sur-face of first cup shaped casing 10 by screws 12. Seal ring 12a is dis-posed within a circumferential groove 12b of annular projection 312 formed at the rear end surface of the center block 310 to form a seal between the inner wall of the first cup shaped casing 10 and the outer peripheral surface of annular projection 312. A first housing 100 includes the first center block 310 and the first cup shaped casing 10 having fixed scroll 50, orbiting scroll 60 and rotation preventing/
thrust bearing device 45 therein. ( ompression mechanism section 110 ~3~61~
comprises a first center block 310 and the construction to the right thereof as shown in Figure ~.
Second center block 320 rotatably supports drive shaft 11 in center block central opening or bore 321 through bearing 33. One end of drive shaft 11 is rotatably supported by rear bearing unit 70 through bearing 71. Stator 40b of motor 40 is held between the sec-ond center block 320 and rear bearing unit 70. Rear bearing unit 70 is releasably secured to the second center block 320 by screws 13. Thus, driving mechanisrn section 120 is to the left of first center block 310 as shown in Figure 2.
The second center block 320 is positioned firmly within second cup shaped casing 20 and against ridge 323 formed in the inner wall of the second cup shaped casing 20. A second housing 200 includes the driving mechanism section 120 and the second cup shaped casing 20.
Bushing 115 is attached to one end of drive shaft 11 at a radial offset through pin member 115b.
The first housing 100 and the second housing 200 are`fitted together so that bushing 115 is inserted into annular projection 16 of circular end plate 61. Drive shaft 11 is attached to orbiting scroll at a radial offset. Flange 21a formed at opening end 21 of second cup shaped casing 20 is releasably and hermetically secured to radial pro-jection 313 of first center block 310 by screws 14 and seal ring 14a.
Seal ring 14a iS disposed within a circular groove 14b of flange 21a to form a seal between the front end surface of radial projection 313 and the axial end surface of flange 21a. Annular projection 322 and the recess defined by projection 312 form an alignment mechanism for aligning drive shaft 11 with the orbiting scroll when first housing 100 and second housing 200 engage first center block 310. As a result, hermetically sealed compressor housing 400 is formed.
~ Ithough ill~;trative embodiments of the invention have been described in detail with respect to the accompanying drawings, it is to be understood that the invention is not limited to those precise embodiments, and that varioLs changes and modifications may be effected therein by one skilled in the art without departing from the scope of the invention.
SCROLL TYPE COMPRESSOR
BACKGROUND OF THE INVENTION
This invention relates to a scroll type compressor and more particularly, to a motor driven scroll compressor having the compres-sion and drive mechanisms within a hermetically sealed container.
Scroll type fluid displacement apparatus are well known in the prior art. For example, U.S. Patent No. 801,182 issued to Creux dis-clo~ses such an apparatus which includes two scrolls, each having a circular end plate and a spiroidal or involute spiral element. The scrolls are maintained angularly and radially offset so that both spiral elements interfit to form a plurality OI line contacts between their spiral curved surfaces to thereby seal off and define at least one pair of fluid pockets. The relative orbital rnotion of the two scrolls shifts the line contacts along the spiral curved surfaces and~ as a result, the volume of the fluid pockets increases or decreases, dependent on the dlrection of ~he orbital motion. Thus, a scroll type fluid displacement apparatus may be used to compress, expand or pump fluids.
Furthermore, U.S. Patent No. 4,560,330 for example, discloses such a h0rmetic type scroll compressor which includes a fixed scroll, orbiting scroll, rotation preventing device and driving mechanism in one sealed container.
In this hermetic type scroll compressor, the essentially insepa-rable container is sealed by welding or other means so that leakage of refrigerant gas from the container is completely prevented.
While the above mentioned hermetic type scroll compressor prevents leakage of refrigerant gas from the container, this hermetic type SCFOll compressor can hardly be disassembled and reassembled for inspection, and repa~r or exchange of parts.
~3)~ 6~
'~ 2 SUMMARY OF THE INVENTION
It is an object of an aspect of this invention to improve hermetic scroll compressor container to facilitate disassembling and reassembliny of a hermetic type scroll compressor by releasably and hermetically securing a first casing and a second casing through the center block to form the. hermetically sealed container.
It is an object of an aspect of this invention to improve hermetic type scroll compressor manufacturing and maintenance efficiencies by assembling a first housin~ and a second housing of a hermetic type scroll compressor separately so that the first housing, second housing and components therein can be disassembled, reassembled and inspected independently.
It is an object of an aspect of this invention to provide a releasably hermetic securing mechanism which also provides alignment means for aligning appropriate components within the first casing with appropriate components within the second casing.
Various aspects of the invention are as follows:
In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a ~irst wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pock~ts, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion whereby khe volume of the fluid pockets changes during orbital motion to compress the fluid in the pockets, the improvement comprising:
:~3~
~ 2a said housing including a first shell, a separate second shell ancl a center block, said center block being formed as a single piece element having a peripheral portion extending around the periphery of the compressor and an interior portion for rotatably supporting a portion of said drive mechanism, said peripheral portion including fastening means for releasably and hermetically securing said first shell to a ~irst side of said peripheral portion of said center block and said second shell to a second side of said peripheral portion of said center block, at least a portion of said fastening means securing one of said first and second shells to said center block element being disposed within the other of said first and second she:Lls.
In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate Prom which a first wrap extends into the interior of said housing, an orbiting sc-roll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contac-ts which define at least one pair of sealed off fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion whereby the volume of the fluid pockets changes during orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first shell, a separate second shell and a center block, said center block having a peripheral portion extending around the periphery of the compressor and an .' ~ 2b interior portion located inwardly of the peripheral portion, said first shell being releasably and hermetically secured to a first side of said peripheral portion of said center block, said second shell begin releasably and hermetically secured to a second side of said peripheral portion of said canter block, a portion of said rotation preventing means being connected to a first side of said ~0 interior portion of said center block, one end portion of said drive shaft being rotatably supported in a second opposite side of said interior portion of said center block, a rear bearing support block releasably connected to said second side of said interior portion of said center block, the other end portion of said drive shaft being supported by said rear bearing support block.
In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality o~ line contacts which de~ine at least one pair of sealed off fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting s~.roll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion whereby the volume of tha fluid pockets changes during orbital motion to comprass the fluid in the pocXets, the improvement comprising:
~3~
~ 2c said housing includ:ing a first shell and a separate second shell, said first shell having a first center block disposed therein, said first center bloc~ having a peripheral portion extending around the periphery of the compressor and radially beyond said first shell, said first shell being releasably and hermetically secured to a first side of said peripheral portion of said first center block, said second shell including a second center block dispo~ed therein for supporting said driving mechanism, said second shell being releasably and hermetically secured to a second side of said peripheral portion of said first center block.
In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extencls, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair o~ sealed off fluid pockets, a driving mechanism including a motor su~ported in said housing, said driving mechanism bei.ng operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion thereof/ whereby the volume of the fluid pockets changes during said orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first casing, a separate second casing and a center block, said first casing housing said fixed scroll, said orbiting scroll and said rotation preventing means, said second casing housing said driving mechanism which further includes a drive shaft;
A~
~(3 5~6~
~ 2d said center block supporting said driving mechanism and orbiting scroll, said center block including a peripheral portion extending radially beyond said first casing and around the periphery of the housing, said first casing being releasably and hermetically secured to a flrst side of said peripheral portion and said second casing being releasably and hermetically secured to a second side of said peripheral portion in a manner such that a portion of said center block peripheral portion forms part of the housing outer surface.
In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior o~ said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality o~ line contacts which define at least one pair of sealed of~ fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to e~fect the orbital motion o~
said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion thereof~ whereby the volume of the fluid pockets changes during said orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first casing and a second casing, said first casing housing said fixed scroll, said orbiting scroll and said rotation preventing means, said second casing housing said driving mechanism which ~urther includes a drive sha~t, wherein said first and second casings are releasably secured to a first center block to form sa.id hermetically sealed housing;
. .
13~561 38 ~ 2e said first center block being disposed within said first casing, said first center block having a front surface and a rear surface, said rear surface being connected to a portion of said rotation preventing means;
a second center block being disposed within said second casing and rotatably supporting one end of said drive shaft, said second center block having a front surface facing said first center block front surface; and alignment means formed on engagi.ng portions of said facing surfaces of said first and second center blocks for aligning said drive shaft with said orbiting scroll.
In a s¢roll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly di~posed within said housing and having an end plate from which a first wrap axtends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap ~xtends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pockets, a driving ; mechanism including a motor supported in said housing, said driving mechanism being operatively connected to ~: said orbiting scroll to effect the orbital motion of ~:~ said orbiting scroll, rotation preventing means for ; : preventing the rotation of sald orbiting scroll during orbital motion whereby the volume of the fluid pockets changes during orbital motion to compress the fluid in : the pockets, the improvement comprising-said housing including a first shell, a separate second shell and a center hlock, said : center block comprising a first block and a second : 35 separate block, said first block having a peripheral portion extending around the periphery of the compressor, said peripheral portion ~''''~ .
~ ' ' ' , .
`
~L3~S~
including fastening means for releasably and hermetically securing said first shell to a first side of said peripheral portion of said center block and said second shell to a second side of a peripheral portion of said center block, at least a portion o* said fastening means securing one of said first and second shells to said peripheral portion of the center ~lock being disposed within the other of said ~irst and second shells, said second block having an interior portion of rotatably supporting a portion of said drive mechanism.
A hermetic type scroll compressor, according to one embodiment of this invention, includes first and second cup shaped casings and a center block therebetween. A
fixed scroll is fixedly disposed in the first cup shaped casing and has a circular en~ plate from which a first wrap extends. An orbiting scroll has a circular end plate from which a second wrap extends. The first and second wraps interfit at an angular and radial offset to form a plurality of line contacts to define at least one pair of sealed off fluid pockets. A rotation pr~venting device is disposed between the orbiting ~croll and the center block which is connected to the first and second cup shaped casings. A driving mechanism having a motor driven drive shaft is disposed in the second cup shaped casing and operatively connects to the orbiting scroll to effect the orbital motion of the orbiting scroll by rotation of a drive shaft while rotation of the orbiting scroll is prevented by a rotation preventing device. As a result, the fluid pockets shift along the spiral curved surfaces of the wraps which change the volume of the fluid pockets.
According to an aspect of the present invention, the first housing having the first cup shaped casing, fixed scroll, orbiting scroll and rotation ",~.
~5~
preventing device is built on the center block. The second housing having ~he drive shaft, motor and second cup shaped casing is also built on the center block. The first cup shaped casing and the second ¢up shaped casing are releasably and hermetically secured to each other through the center block.
Further objects, features and other aspects of this invention will be understood from the detailed description of the preferred embodiment of this invention with reference to the annexed drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a vertical longitudinal sectional view of a hermetic type scroll compressor in accordance with one embodiment of this inven~ion.
Figure 2 is a vertical longitudinal sectional view of a hermetic type scroll compressor in accordance with another embodiment of this invention.
DETAILED DESCRIPTION OF THE PREFE:RRED EMBODIMENT
Figure 1 depicts a hermetic type scroll refrigerant compressor 1 in accordance with a first embodiment of the present invention.
Compressor 1 includes first cup shaped casing 10, second cup shaped casing 20 and center block 30 which is a~tached to first cup shaped casing 10 and second cup shaped casing 20. Opening or bore 31 is formed in the center of center bloc~ 30 for receiving drive shaft 11.
Radial projection 301 is formed in the inner peripheral surface of opening 31. Drive shaft 11 is rotatably supported in opening 31 by bearing 33. Bearing 33 firmly fits in opening 31. Outer ring 33a of bearing 33 is s~opped at a rear end surface of radial projection 301.
Nut 34 is screwed on drive shaft 11 and faces one end surface of inner ring 33b of bearing 33. Flange 111 loca~ed at one end of drive shaft 11 faces the other end surface of inner ring 33b of bearing 33. Axial motion of drive shaft 11 is thereby prevented by flange 111 and nut 34. Rotor 40a of motor 40 surrounds drive shaft 11. Rotor 40a may be firmly inserted over drive shaft 11.
F~xed scroll 50 includes circular end plate 51 and wrap or spiral elements 52 affixed to or extending from one end surface of end plate i~L3~
51. Fixed scroll 50 is fixed within the inner chamber of fi~t cup shaped casing 10 by screws 11 screwed into end plate 51 irom outside of first cup shaped casing 10. Seal ring llb is located between an inner surface of screw flange lla and the outer end surface of first cup shaped casing 10 to seal the connection therebetween. Circular end plate 51 of fixed scroll 50 partitions the inner chamber of first cup shaped casing 10 into two chambers, such as front chamber 1 and rear chamber 19.
Orbiting scroll 60 is disposed at the rear end side of center block 30 through later mentioned rotation preventing/thrust bearing device 45. Orbiting scroll 60 includes circular end plate 61 and wrap or spiral element 62 affixed to or extending from one end surface of circular end plate 61. Annular projection 16 is formed opposite the surface of circular end plate 61 from which spiral element 62 extends.
Bearing 16d is disposed within the inner peripheral wall of the annular projection lB.
~ 3ushing 115 is attached to one end of drive shaft 11 at a radial offset through pin member 115b. Bushing 115 is inserted into annular projection 16 of orbiting scroll 60. Orbiting scroll 60 is rotatably sup-ported by bushing 115 through bearing 16d placed on the outer periph-eral surface of bushing 115.
Rotation preventing/thrust bearing device 45 is placed between the rear end surface of center block 30 and the end surface of circu-lar end plate 61. Rotation preventing/thrust bearing device 45 includes fixed ring ~51 attached on the axial end surface of annular projection 302 which is formed in the rear end surface of center block 30, orbiting ring 452 attached on the end surface of circular end plate 61, and a plurality of bearing elements, such as balls 453, placed between pockets 451a, 452a îormed by rings 451, 452. The rotation of orbiting scroll 60 during orbital motion is prevented by the interaction of balls 453 with rings 451, 452. Also, the axial thrust load from orbiting scroll 60 is supported on center block 30 through balls 453.
While orbiting scroll 60 orbits, the rotation of orbiting scroll 60 is prevented by rotation preventing/thrust bearing device 45.
~L3~
In this situation, spiral element 62 of orbiting scroll 60 interfits spiral element 52 of fixed scroll 50 at an annular offset of 180 and at a predetermined radial offset. Spiral elements 62 and 52 define at least one pair of seale~ off fluid pockets between their interfitting surfaces.
Radial projection 303 formed in the outer peripheral surface of center block 30 is fixed to the axial end surface of first cup shaped casing 10 by screws 12. Seal ring 12a is disposed within circumferen-tial groove 12b of annular projection 302 to form a seal between the inner wall of îirst cup shaped casing 10 and the outer peripheral sur-face of annular projection 302.
The other end of drive shaft 11 is also rotatably supported by supporting block (rear bearing unit) 70 through bearing 71. Stator 40b of motor 40 is held firmly between center block 30 and rear bearing unit ~0. Rear bearing unit ~Q is fixed to center block 30 by screws 13 screwed into center block 30 from the rear end of rear bearing unit 70. Therefore, stator 40b is held firmly between center block 30 and rear bearing unit 70. The inner peripheral surface of stator 40b and the outer peripheral surface of rotor 40a face each other.
Rear bearing unit 7n and motor 40 are covered by second cup shaped casing 20. Flange 21a formed at opening end 21 of second cup shaped casing 20 is fixed to radial projection 303 of center block 30 by screws 14. Seal ring 14a ~s disposed within a circular groove 14b of flange 21a to form a seal between the front end surface of radial pro-jection 303 and an axial end surface of flange 21a.
Wires 411 from stator 40h are connected with terminals 412a.
Terminals 412a are connected to an external electrical source (not shown) through a switch (also not sho~rn). Hermetic seal base 412 is insulated from terminaLis 412a and fixed to projection 413 which is formed on side surface of second cup shaped casing 20 by screws 414.
Seal ring 414a is disposed within a circular groove 414b of projection 413 to form a seal between the rear end surface of hermetic seal base 412 and the axial end surface of projection 413.
By turning on the motor 40, a magnetic field of stator 40b is generated so that rotor 40a begins rotation, thereby rotating drive shaft 11. This rotation is transferred to orbiting scroll 60 through bushing 115. Orbiting scroll 60 begins orbital motion due to rotation prevention/thrust bearing device 45O Refrigerant gas is introduced to inner chamber 25 of second cup shaped casing 21 through inlet port 20c which is formed at the side wall of second cup shaped casing 20, and flows through front chamber 18 of first cup shaped casing 10 through bearing 33 and then through rotation preventing/thrust bear-ing device 45. The refrigerant gas in the front chamber is taken into the sealed fluid pockets between the fixed scroll and orbiting scroll, then moves ~oward the cen~er of the spiral wraps during the orbital motion of the orbiting scroll with a resultant volume reduction and compression, and is discharged to rear chamber 19 as through hole 56 and one-way valve 56c. Discharged gas in the rear chamber then flows to an external fluid circuit (not shown) through outlet port 10c.
Referring to Figure 2, hermetic type scroll refrigerant com-pressor 1 is shown in accordance wi-th another embodiment of the present invention. The same construction is accorded like numerals as that shown in Figure 1. The description of that constructions is substantially omitted to simplify the description herein.
Orbiting scroll 60 interfits fixed scroll 50. Annular projection 16 is formed opposite the surface of circular end plate 61 from which spiral element 62 is extended. Bearing 16d is disposed within the inner peripheral wall of the annular projection 16. A first center block 310 having central opening or bore 311 is disposed adjacent to rotation preventing/thrust bearing device 45. The first center block 310 is releasably and hermetically secured fixed to an axial end sur-face of first cup shaped casing 10 by screws 12. Seal ring 12a is dis-posed within a circumferential groove 12b of annular projection 312 formed at the rear end surface of the center block 310 to form a seal between the inner wall of the first cup shaped casing 10 and the outer peripheral surface of annular projection 312. A first housing 100 includes the first center block 310 and the first cup shaped casing 10 having fixed scroll 50, orbiting scroll 60 and rotation preventing/
thrust bearing device 45 therein. ( ompression mechanism section 110 ~3~61~
comprises a first center block 310 and the construction to the right thereof as shown in Figure ~.
Second center block 320 rotatably supports drive shaft 11 in center block central opening or bore 321 through bearing 33. One end of drive shaft 11 is rotatably supported by rear bearing unit 70 through bearing 71. Stator 40b of motor 40 is held between the sec-ond center block 320 and rear bearing unit 70. Rear bearing unit 70 is releasably secured to the second center block 320 by screws 13. Thus, driving mechanisrn section 120 is to the left of first center block 310 as shown in Figure 2.
The second center block 320 is positioned firmly within second cup shaped casing 20 and against ridge 323 formed in the inner wall of the second cup shaped casing 20. A second housing 200 includes the driving mechanism section 120 and the second cup shaped casing 20.
Bushing 115 is attached to one end of drive shaft 11 at a radial offset through pin member 115b.
The first housing 100 and the second housing 200 are`fitted together so that bushing 115 is inserted into annular projection 16 of circular end plate 61. Drive shaft 11 is attached to orbiting scroll at a radial offset. Flange 21a formed at opening end 21 of second cup shaped casing 20 is releasably and hermetically secured to radial pro-jection 313 of first center block 310 by screws 14 and seal ring 14a.
Seal ring 14a iS disposed within a circular groove 14b of flange 21a to form a seal between the front end surface of radial projection 313 and the axial end surface of flange 21a. Annular projection 322 and the recess defined by projection 312 form an alignment mechanism for aligning drive shaft 11 with the orbiting scroll when first housing 100 and second housing 200 engage first center block 310. As a result, hermetically sealed compressor housing 400 is formed.
~ Ithough ill~;trative embodiments of the invention have been described in detail with respect to the accompanying drawings, it is to be understood that the invention is not limited to those precise embodiments, and that varioLs changes and modifications may be effected therein by one skilled in the art without departing from the scope of the invention.
Claims (35)
1. In a scroll type compressor with a hermatically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion whereby the volume of the fluid pockets changes during orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first shell, a separate second shell and a center block, said center block being formed as a single piece element having a peripheral portion extending around the periphery of the compressor and an interior portion for rotatably supporting a portion of said drive mechanism, said peripheral portion including fastening means for releasably and hermetically securing said first shell to a first side of said peripheral portion of said center block and said second shell to a second side of said peripheral portion of said center block, at least a portion of said fastening means securing one of said first and second shells to said center block element being disposed within the other of said first and second shells.
said housing including a first shell, a separate second shell and a center block, said center block being formed as a single piece element having a peripheral portion extending around the periphery of the compressor and an interior portion for rotatably supporting a portion of said drive mechanism, said peripheral portion including fastening means for releasably and hermetically securing said first shell to a first side of said peripheral portion of said center block and said second shell to a second side of said peripheral portion of said center block, at least a portion of said fastening means securing one of said first and second shells to said center block element being disposed within the other of said first and second shells.
2. The hermetically sealed scroll type compressor of Claim 1 wherein said scrolls are surrounded by said first shell and said motor including a rotor and stator is surrounded by the second shell.
3. The hermetically sealed scroll type compressor of Claim 2 further comprising said fixed scroll being releasably and hermetically secured to the first shell.
4. The hermetically sealed scroll type compressor of any of Claims 1, 2 or 3 wherein each shell is cup shaped.
5. The hermetically sealed scroll type compressor of Claim 1 wherein at least a portion of said fastening means securing said first shell to said center block is disposed within said second shell.
6. In a scroll type compressor with a hermetically sealed housing the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion whereby the volume of the fluid pockets changes during orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first shell, a separate second shell and a center block, said center block having a peripheral portion extending around the periphery of the compressor and an interior portion located inwardly of the peripheral portion, said first shell being releasably and hermetically secured to a first side of said peripheral portion of said center block, said second shell begin releasably and hermetically secured to a second side of said peripheral portion of said center block, a portion of said rotation preventing means being connected to a first side of said interior portion of said center block, one end portion of said drive shaft being rotatably supported in a second opposite side of said interior portion of said center block, a rear bearing support block releasably connected to said second side of said interior portion of said center block, the other end portion of said drive shaft being supported by said rear bearing support block.
said housing including a first shell, a separate second shell and a center block, said center block having a peripheral portion extending around the periphery of the compressor and an interior portion located inwardly of the peripheral portion, said first shell being releasably and hermetically secured to a first side of said peripheral portion of said center block, said second shell begin releasably and hermetically secured to a second side of said peripheral portion of said center block, a portion of said rotation preventing means being connected to a first side of said interior portion of said center block, one end portion of said drive shaft being rotatably supported in a second opposite side of said interior portion of said center block, a rear bearing support block releasably connected to said second side of said interior portion of said center block, the other end portion of said drive shaft being supported by said rear bearing support block.
7. The hermetically sealed scroll type compressor of Claim 6 wherein said center block is formed as a single piece element.
8. The hermetically sealed scroll type compressor of Claim 6 wherein said center block is formed of a first block and a second separate block, said first block including said peripheral portion and said first side of said interior portion of said center block, and said second block including said second side of said interior portion of said center block.
9. The hermetically sealed scroll type compressor of Claim 8 wherein said second block includes an annular projection, said first block includes an annular portion having an annular recess in the wall thereof, said recess having an abutment surface substantially normal to the drive shaft center line, the annular projection and recess cooperating to form an alignment means for aligning said drive shaft with the orbiting scroll.
10. The hermetically sealed scroll type compressor of Claim 9 wherein the first block and second block each have a surface which extends radially outwardly from said first block annular portion and said second block annular projection respectively, and each surface is frustoconical.
11. The hermetically sealed scroll type compressor of Claim 6 wherein said scrolls are surrounded by said first shell and said motor including a rotor and a stator are surrounded by said second shell.
12. The hermetically sealed scroll type compressor of Claim 11 wherein said fixed scroll is releasably and hermetically secured to said first shell.
13. The hermetically sealed scroll type compressor according to any of Claims 6, 7, 8 or 9 wherein the improvement further comprises each shell being cup shaped.
14. The hermetically sealed scroll type compressor of Claim 9 wherein said annular projection and annular portion are concentrically disposed about said drive shaft.
15. The hermetically sealed scroll type compressor of Claim 10 wherein said annular projection and annular portion are concentrically disposed about said drive shaft.
16. In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion whereby the volume of the fluid pockets changes during orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first shell and a separate second shell, said first shell having a first center block disposed therein, said first center block having a peripheral portion extending around the periphery of the compressor and radially beyond said first shell, said first shell being releasably and hermetically secured to a first side of said peripheral portion of said first center block, said second shell including a second center block disposed therein for supporting said driving mechanism, said second shell being releasably and hermetically secured to a second side of said peripheral portion of said first center block.
said housing including a first shell and a separate second shell, said first shell having a first center block disposed therein, said first center block having a peripheral portion extending around the periphery of the compressor and radially beyond said first shell, said first shell being releasably and hermetically secured to a first side of said peripheral portion of said first center block, said second shell including a second center block disposed therein for supporting said driving mechanism, said second shell being releasably and hermetically secured to a second side of said peripheral portion of said first center block.
17. In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion thereof, whereby the volume of the fluid pockets changes during said orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first casing, a separate second casing and a center block, said first casing housing said fixed scroll, said orbiting scroll and said rotation preventing means, said second casing housing said driving mechanism which further includes a drive shaft;
said center block supporting said driving mechanism and orbiting scroll, said center block including a peripheral portion extending radially beyond said first casing and around the periphery of the housing, said first casing being releasably and hermetically secured to a first side of said peripheral portion and said second casing being releasably and hermetically secured to a second side of said peripheral portion in a manner such that a portion of said center block peripheral portion forms part of the housing outer surface.
said housing including a first casing, a separate second casing and a center block, said first casing housing said fixed scroll, said orbiting scroll and said rotation preventing means, said second casing housing said driving mechanism which further includes a drive shaft;
said center block supporting said driving mechanism and orbiting scroll, said center block including a peripheral portion extending radially beyond said first casing and around the periphery of the housing, said first casing being releasably and hermetically secured to a first side of said peripheral portion and said second casing being releasably and hermetically secured to a second side of said peripheral portion in a manner such that a portion of said center block peripheral portion forms part of the housing outer surface.
18. In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion thereof, whereby the volume of the fluid pockets changes during said orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first casing and a second casing, said first casing housing said fixed scroll, said orbiting scroll and said rotation preventing means, said second casing housing said driving mechanism which further includes a drive shaft, wherein said first and second casings are releasably secured to a first center block to form said hermetically sealed housing;
said first center block being disposed within said first casing, said first center block having a front surface and a rear surface, said rear surface being connected to a portion of said rotation preventing means;
a second center block being disposed within said second casing and rotatably supporting one end of said drive shaft, said second center block having a front surface facing said first center block front surface; and alignment means formed on engaging portions of said facing surfaces of said first and second center blocks for aligning said drive shaft with said orbiting scroll.
said housing including a first casing and a second casing, said first casing housing said fixed scroll, said orbiting scroll and said rotation preventing means, said second casing housing said driving mechanism which further includes a drive shaft, wherein said first and second casings are releasably secured to a first center block to form said hermetically sealed housing;
said first center block being disposed within said first casing, said first center block having a front surface and a rear surface, said rear surface being connected to a portion of said rotation preventing means;
a second center block being disposed within said second casing and rotatably supporting one end of said drive shaft, said second center block having a front surface facing said first center block front surface; and alignment means formed on engaging portions of said facing surfaces of said first and second center blocks for aligning said drive shaft with said orbiting scroll.
19. The hermetically sealed scroll type compressor of Claim 18 wherein said alignment means comprises an annular recess formed at an inner portion of said first center block and an annular projection formed on said second center block.
20. The hermetically sealed scroll type compressor of Claim 19 wherein said annular recess includes an abutment surface for preventing said annular projection from penetrating beyond said first center block within said first casing, said abutment surface being substantially normal to the center line of said drive shaft.
21. The hermetically sealed scroll compressor of Claim 19 wherein said alignment means further comprises a guide surface formed on said front surface of said first center block for guiding said second center block therealong and toward said annular recess, said guide surface extending radially outwardly from said annular recess.
22. The hermetically sealed scroll compressor of Claim 21 wherein said guide surface is frustoconical.
23. The hermetically sealed scroll compressor of Claim 22 wherein said front surface of said second center block comprises a frustoconical portion extending radially outwardly from said annular projection.
24. The hermetically sealed scroll compressor of Claim 18 wherein said first center block is releasably secured to said first casing.
25. In a scroll type compressor with a hermetically sealed housing, the compressor comprising a fixed scroll fixedly disposed within said housing and having an end plate from which a first wrap extends into the interior of said housing, an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pockets, a driving mechanism including a motor supported in said housing, said driving mechanism being operatively connected to said orbiting scroll to effect the orbital motion of said orbiting scroll, rotation preventing means for preventing the rotation of said orbiting scroll during orbital motion whereby the volume of the fluid pockets changes during orbital motion to compress the fluid in the pockets, the improvement comprising:
said housing including a first shell, a separate second shell and a center block, said center block comprising a first block and a second separate block, said first block having a peripheral portion extending around the periphery of the compressor, said peripheral portion including fastening means for releasably and hermetically securing said first shell to a first side of said peripheral portion of said center block and said second shell to a second side of a peripheral portion of said center block, at least a portion of said fastening means securing one of said first and second shells to said peripheral portion of the center block being disposed within the other of said first and second shells, said second block having an interior portion for rotatably supporting a portion of said drive mechanism.
said housing including a first shell, a separate second shell and a center block, said center block comprising a first block and a second separate block, said first block having a peripheral portion extending around the periphery of the compressor, said peripheral portion including fastening means for releasably and hermetically securing said first shell to a first side of said peripheral portion of said center block and said second shell to a second side of a peripheral portion of said center block, at least a portion of said fastening means securing one of said first and second shells to said peripheral portion of the center block being disposed within the other of said first and second shells, said second block having an interior portion for rotatably supporting a portion of said drive mechanism.
26. The hermetically sealed scroll type compressor of Claim 25 wherein said scrolls are surrounded by said first shell and said motor including a rotor and stator is surrounded by the second shell.
27. The hermetically sealed scroll type compressor of Claim 26 further comprising said fixed scroll being releasably and hermetically secured to the first shell.
28. The hermetically sealed scroll type compressor of Claim 27 wherein each shell is cup shaped.
29. The hermetically sealed scroll type compressor of Claim 26 wherein each shell is cup shaped.
30. The hermetically sealed scroll type compressor of Claim 25 wherein each shell is cup shaped.
31. The hermetically sealed scroll type compressor of Claim 25 wherein at least a portion of said fastening means securing said first shell to said center block is disposed within said second shell and radially inwardly from the inner wall thereof.
32. The hermetically sealed scroll type compressor of Claim 7 wherein said scrolls are surrounded by said first shell and said motor including a rotor and a stator are surrounded by said second shell.
33. The hermetically sealed scroll type compressor of Claim 8 wherein said scrolls are surrounded by said first shell and said motor including a rotor and a stator are surrounded by said second shell.
34. The hermetically sealed scroll type compressor of Claim 9 wherein said scrolls are surrounded by said first shell and said motor including a rotor and a stator are surrounded by said second shell.
35. The hermetically sealed scroll type compressor of any of Claims 32, 33 or 34 wherein said fixed scroll is releasably and hermetically secured to said first shell.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-67355 | 1987-03-20 | ||
| JP62-67354 | 1987-03-20 | ||
| JP62067354A JPS63235682A (en) | 1987-03-20 | 1987-03-20 | Scroll type fluid device |
| JP62067355A JPS63235683A (en) | 1987-03-20 | 1987-03-20 | Scroll type fluid device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1305688C true CA1305688C (en) | 1992-07-28 |
Family
ID=26408551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000561812A Expired - Lifetime CA1305688C (en) | 1987-03-20 | 1988-03-18 | Scroll type compressor |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0283045B1 (en) |
| KR (1) | KR960014085B1 (en) |
| CN (1) | CN1011811B (en) |
| AU (1) | AU607745B2 (en) |
| CA (1) | CA1305688C (en) |
| DE (1) | DE3863799D1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01182586A (en) * | 1988-01-14 | 1989-07-20 | Sanden Corp | Enclosed scroll compressor |
| JP3078369B2 (en) * | 1991-10-24 | 2000-08-21 | サンデン株式会社 | Compressor |
| JPH05113187A (en) * | 1991-10-24 | 1993-05-07 | Sanden Corp | Compressor |
| JPH08193580A (en) * | 1994-11-17 | 1996-07-30 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
| US6350111B1 (en) * | 2000-08-15 | 2002-02-26 | Copeland Corporation | Scroll machine with ported orbiting scroll member |
| JP5592838B2 (en) | 2011-06-13 | 2014-09-17 | サンデン株式会社 | Fluid machinery |
| CN102330679B (en) * | 2011-09-16 | 2013-08-14 | 大连三洋压缩机有限公司 | Demountable type scroll compressor |
| US9879678B2 (en) * | 2013-03-27 | 2018-01-30 | Johnson Controls-Hitachi Air Conditioning Technology (Hong Kong) Limited | Scroll compressor |
| US11656003B2 (en) | 2019-03-11 | 2023-05-23 | Emerson Climate Technologies, Inc. | Climate-control system having valve assembly |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2331878A (en) * | 1939-05-25 | 1943-10-19 | Wentworth And Hull | Vane pump |
| US3311293A (en) * | 1965-08-06 | 1967-03-28 | Gast Mfg Corp | Integral vacuum pump and air compressor |
| US4065279A (en) * | 1976-09-13 | 1977-12-27 | Arthur D. Little, Inc. | Scroll-type apparatus with hydrodynamic thrust bearing |
| US4314796A (en) * | 1978-09-04 | 1982-02-09 | Sankyo Electric Company Limited | Scroll-type compressor with thrust bearing lubricating and bypass means |
| JPS55109793A (en) * | 1979-02-17 | 1980-08-23 | Sanden Corp | Displacement type fluid compressor |
| US4552518A (en) * | 1984-02-21 | 1985-11-12 | American Standard Inc. | Scroll machine with discharge passage through orbiting scroll plate and associated lubrication system |
-
1988
- 1988-03-18 AU AU13258/88A patent/AU607745B2/en not_active Ceased
- 1988-03-18 DE DE8888104390T patent/DE3863799D1/en not_active Expired - Lifetime
- 1988-03-18 EP EP88104390A patent/EP0283045B1/en not_active Expired - Lifetime
- 1988-03-18 CA CA000561812A patent/CA1305688C/en not_active Expired - Lifetime
- 1988-03-19 KR KR1019880002949A patent/KR960014085B1/en not_active IP Right Cessation
- 1988-03-31 CN CN88102057A patent/CN1011811B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| KR960014085B1 (en) | 1996-10-12 |
| AU1325888A (en) | 1988-09-22 |
| EP0283045A2 (en) | 1988-09-21 |
| AU607745B2 (en) | 1991-03-14 |
| KR880011473A (en) | 1988-10-28 |
| CN88102057A (en) | 1988-10-05 |
| CN1011811B (en) | 1991-02-27 |
| EP0283045B1 (en) | 1991-07-24 |
| EP0283045A3 (en) | 1989-06-14 |
| DE3863799D1 (en) | 1991-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |