(11.)Puhlication number
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`2003007400
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`(43)Date of publication of application
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`03.04.2003
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`(51)Int.£§l.
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`F04C 18/02
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`FfléC 29i04
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`(2 1)Application number
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`2001-2953478
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`(22)Date of filing
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`71)Applicant
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`(72)Inventor
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`2709.200 1
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`Hl’l‘ACHi LTD
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`OSHIMA element
`
`KOYAMA MASSAKl
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`(54)SCROLL COMPRESSOR
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`(57lAhstract
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`PROBLEM TO BE SQLVEDi ”To provide a scroll compressor with superior efficiency by
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`reducing the unbalance of discharge starting pressure generated at injection, and
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`reducing discharge pressure loss.
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`SOLU’l‘lONZ The discharge starting timing of a compression space A and the discharge
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`starting timing of a compression space 8 are made different. The minimum sealed
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`volume immediately before the discharge starting of the compression space A and the
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`minimum sealed volume immediately before the discharge starting of the compression
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`space B are made different. The compression starting timing of the compression space A
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`and the compression starting timing of the compression space B are made different. The
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`maximum sealed volume of the compression space A and the maximum sealed volume of
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`the compression space E are made different. The timing of separating a lap outside
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`surface winding starting part of a turning scroll from a lap inside surface ofa fixed scroll
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`and the timing of separating a lap outside surface winding start
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`* NOTICES *
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`JPO and EN??? are not responsible for any
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`damages caused by the use of this translation.
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`1.’l‘his document has been translated by computer. So the translation may not
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`reflect the original precisely.
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`25““ shows the word which can not be translated,
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`Sin the drawings, any words are not translated.
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`CLAIMS
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`

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`lClaimfsll
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`lClaim lllt has a turning scroll and a fixed scroll which have a spiral lap on each base
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`plate, By carrying out each lap inside, combining it and circling to the aforementioned
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`fixed scroll in the state where the aforementioned turning scroll had rotation prevented,
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`Compression space (A) formed in a lap outer side surface of the aforementioned turning
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`scroll, and a lap inner side surface of the aforementioned fixed scroll, And compression
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`space CB)- formed in a lap inner side surface of the aforementioned turning scroll, and a
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`lap outer side surface of the aforementioned fixed scroll, it is what decreases each volume,
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`compresses gas and has a discharge port of this compressed gas in at least 1 side of the
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`aforementioned turning scroll or the aforementioned fixed scroll, A scroll, compressor,
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`wherein a discharge starting time of the aforementioned compression space (A) differs
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`from a discharge starting time of the aforementioned compression space (B) in a scroll
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`compressor which has an injection hole which injects a refrigerant or an oil into the
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`aforementioned compression space in the aforementioned fixed scroll,
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`lClaim Ellt has a turning scroll and a fixed scroll which have a spiral lap on each base
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`plate, By carrying out each lap inside, combining it and circling to the aforementioned
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`fixed scroll in the state where the aforementioned turning scroll had rotation prevented,
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`Compression space (Al formed in a lap outer side surface of the aforementioned turning
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`scroll, and a lap inner side surface of the aforementioned fixed scroll, And compression
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`space (B) formed in a lap inner side surface of the aforementioned turning scroll, and a
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`lap outer side surface of the aforementioned fixed scroll, It. is what decreases each volume,
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`compresses gas and has a discharge port of this compressed gas in at least 1 side of the
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`aforementioned turning scroll or the aforementioned fixed scroll, 1: scroll compressor,
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`wherein minimum sealed volume in front of discharge starting of the aforementioned
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`compression space (A) differs from minimum sealed volume in front of discharge starting
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`of the aforementioned compression space (E) in a scroll compressor which has an
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`injection hole which injects a refrigerant or an oil into the aforementitmed compression
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`space in the aforementioned fixed scroll.
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`lClaim SlA scroll compressor of a Claims 1:2 description, wherein a compression start
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`period of the aforementioned compression space (A) differs from a compression start
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`period of the aforementioned compression space (8).
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`lClaim 4lA scroll compressor of a Claims 1-2 description, wherein maximum sealed
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`volume of the aforementioned compression space (A) differs from maximum sealed
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`volume of the aforementioned compression space (8).
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`lC-laim ElA means by which a discharge starting time of the aforementioned compression
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`space (A) differs from a discharge starting time of the aforementioned compression space
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`

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`(B), Or a means by which minimum sealed volume in front of discharge starting of the
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`aforementioned compression space (A) differs from minimum sealed, volume in front of
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`discharge starting of the aforementioned compression space (E), A scroll compressor of a
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`Claims 1-4 description which is that a time when a lap outer side sur Tace winding start
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`part of the aforementioned turning scroll separates from a lap inner side surface of the
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`aforementioned fixed scroll differs from a time when a lap outer side surface winding
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`start part of the aforementioned fixed scroll separates from a lap inner side surface of
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`the aforementioned turning scroll.
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`lClaim filA means by which a discharge starting time of the aforementioned compression
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`space (A) differs from a discharge starting time of the aforementioned compression space
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`(E), Or a scroll compressor of a Claims 1-4 description by a means by which one side of
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`the aforementioned compression space (A) and (B) carries out the communication start
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`of a means by which minimum sealed volume in front of discharge starting of the
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`aforementioned compression space (A) differs from minimum sealed volume in front of
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`discharge starting of the aforementioned compression space (B) heyond another side in
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`a discharge port.
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`DETAILED DESCRIPTION
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`EDetailed Description of the lnventionl
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`[sect]
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`lr‘ield of the lnventionlln the present invention, a scroll compressor is started and it is
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`related with a scroll compressor suitable although efficient-izing and high-reliability-
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`ization is attained especially.
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`’llherefore, it is used for an air conditioner, a freezer, a refrigerator, etc.
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`{0002]
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`lDescription of the Prior ArtlAs technology about the injection of a scroll compressor,
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`there is a JP H3 - 156186A, for exam ple.
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`lOOOSlThis prior art is compression space (A) formed in the lap outer side surface of a
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`turning scroll, and the lap inner side surface of a fixed scroll. And injection is carried out
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`to the compression space of both of compression space (3) formed in the lap inner side
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`surface of a turning scroll, and the lap outer side surface of a fixed scroll by one injection
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`hole.
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`leec4i
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`lProblem to be solved by the inventionlAlthough there is an advantage that the above-
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`mentioned conventional technology can be managed with one injection piping, since the
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`times when an injection hole carries out an opening to each compression space differ the
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`

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`pressures of each compression space at the time of carrying out an opening differ, and
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`the amounts of injections also differ. Therefore, the pressures in the minimum sealed
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`volume in front of discharge starting ofeach compression space differed, and the problem
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`that it became a factor of degradation, such as fault compression and insufficient
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`compression, occurred.
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`l0005lln the Prior art, the problem that a discharge pressure loss increased occurred by
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`the increase in a discharge flow amount by injection.
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`lflflflfil’l‘here is the object of this invention in reducing the imbalance of the pressure at
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`the time of the discharge starting which occurs when injection is carried out, and
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`reducing a discharge pressure loss, and providing an efficient scroll compressor.
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`{coon
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`[Means for solving prohlcmlln order to solve an aforementioned problem, the composition
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`concerning the scroll compressor of the present invention is as follows,
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`lOOGBllt has the turning scroll and fixed scroll which have a spiral lap on each base plate,
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`By ;arrying out each lap inside, combining it and circling to the aforementioned fixed
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`scroll in the state where the aforementioned turning scroll had rotation prevented, The
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`compression space (A) formed in the lap outer side surface of the aforementioned turning
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`scroll, and the lap inner side surface of the aforementioned fixed scroll, And the
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`compression space (E) formed in the lap inner side surface of the aforementioned turning
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`scroll, and the lap outer side surface of the aforementioned fixed scroll, it is what
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`decreases each volume, compresses gas and has a discharge port of this compressed gas
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`in at least 1 side of the aforementioned turning scroll or the aforementioned fixed scrill,
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`it is made for the discharge starting time of the aforementioned compression space (A)
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`to differ from the discharge starting time of the aforementioned compression space ('8)
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`in the scroll compressor which has an injection hole which injects a refrigerant or an oil
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`into the aforementioned compression space in the aforementioned fixed scroll. it is made
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`for the minimum sealed volume in front of the discharge starting of the athrementioned
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`compression space (A) to differ from the minimum sealed volume in front of the discharge
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`starting of the aforementioned compression space (E),
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`lflfllellt is made for the compression start period of the aforementioned compression
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`space (A) to differ from the compression start period of the aforementioned compression
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`space (E),
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`l0310llt is made for the maximum sealed volume of the aforementioned compression
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`space (A) to differ from the maximum scaled volume of the aforementioned compression
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`space (B).
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`lOOllllt is made for the time when the lap outer side surface winding start part of the
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`

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`aforementioned turningr scroll separates from the lap inner side surface of the
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`aforementioned fixed scroll to differ from the time when the lap outer side surface
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`winding start part of the aforementioned fixed scroll separates from the lap inner side
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`surface of the aforementioned turning scroll.
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`ltltl12l0ne side of the aforementioned compression space (A) and (B) is made to carry out
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`a communication start in a discharge port beyond another side.
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`lllllljilBy each of aboye'mentioned technical meanses, the imbalance of the pressure at
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`the time of the discharge starting which occurs when injection is carried out can be
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`reduced, and a discharge pressure loss can be reduced, and an efficient scroll compressor
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`can be provided.
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`loom}
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`[Mode for carryingr out the inventionlHereinafter; each Example of the present invention
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`is described with reference to the Fig.8 to Fig.1. First, the general entire configuration
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`of a scroll compressor is described with reference to the Fig.2 to Fig.1. Fig.1 shows
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`drawing of longitudinal section of the scroll compressor concerning the first Example of
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`the present invention including relation with an example of a refrigerating cycle. Fig.2
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`is the explanatory View in the scroll compressor of Fig.1 which combined the lap of the
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`turning scroll with the fixed scroll, As for the scroll compressor shown in Fig.1, the
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`electric motor part is stored by a compression mechanism part and the lower part in the
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`upper part in the well-closed container 1. The compression mechanism part is using the
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`fixed scroll 2, the turning scroll 3, the frame 4, the crankshaft 5, and Gldham ring 8 as
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`the main components. The suction pipe 1 O linked to an external cycle is pressed fit in the
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`suction opening 11 of the fixed scroll 2. The fixed scroll 2 has the injection hole 14, and
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`is connected to the external cycle by the injection pipe 16. 17 is a check valve ofinjectien.
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`l0015lAn electric motor part consists of the stator 8 and the rotor 9, the stator 8 is fixed
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`by sh ‘inkage fit etc, in the well-closed container 1, and the rotor 9 is fixed to the
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`crankshaft 5 by press fit etc. The outer peripheral part of the frame 4 is fixed to the well-
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`closed container 1, and possesses the hearing which receives rotation of the crankshaft
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`5. The fixed scroll 2 is concluded, by the frame 4 with the bolt 21.
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`lflfllfil'l‘he fixed scroll 2 consists of spiral lap 2b which stands straight on the base plate
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`2a and this base plate 2a, and the turning scroll 3, it consists of the spiral lap 3b which
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`stands straight on the base plate 3a and this base plate 3a, and. respectively lap part 2b
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`and 3b are turned inside each other, are combined, and the compression space A and B
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`is formed. The eccentric part 5a. of the crankshaft 5 is rota ably inserted in the boss part
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`of the turning scroll 3, and Oldham ring 6 is slidahly arranged by the slot 3c of the base
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`plate 3a section, and the slot (not shown) of the frame 4, and is functioning on them as a
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`

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`revolving preventing means of the turning scroll 3. 7 is a hearing which supports the
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`lower part of the crankshaft 5.
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`lOOi’i/‘lA general working effect of such a scroll compressor is described. The rotor 9
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`receives rotational force by the stator 8, the crankshaft 5 rotates it, and eccentric rotation
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`(revolution) of the turning scroll 3 is carried out, without rotating by working effect of
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`Oldham ring 6. it is gradually compressed by volume reduction of the compression space
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`A and B, a pressure rises, and the refrigerant gas inhaled from the suction opening ll of
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`the fixed scroll 2 through the suction pipe 10 by revolution of the turningr scroll 3 is
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`emitted into the well-closed container 1 from the discharge opening 13. The emitted
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`refrigerant gas cools an electric motor part, and is supplied to an external cycle from. the
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`discharge pipes 18.
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`lOQlSlNext, the first Example of the present invention is described with reference to the
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`Fig.5 to Fig.3 in accordance with Fig.1 and Fig.2. Fig.3 is the figure which describes
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`operation of the compression space A and B in the scroll compressor of Fig.1. Fig.4 is the
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`figure showing the form of the lap winding start part of the turning scroll in the scroll
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`compressor of Fig.1. The state in which the compression space A and B carries out a
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`compression start, (b), and (c) (a) of Fig.3, The compression space A and B shows the
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`state in which the injection hole 14 is carrying out the opening to the compression space
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`A and B, respectively, (d), and (e), respectively, and the state in front of discharge starting
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`by revolution of the turning scroll .3, The volume of the compression space A and B
`U)
`(C), (d), and (c), and each pressure rise . However, since
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`decreases in order of (a), (b),
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`discharge starting of the compression space A is carried out by (d), it has shifted to the
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`discharging stroke in (e), and since it is not compression space any longer, the sign A is
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`not descrihed. As shown in Fig.4, the winding start part of the lap Sh ofa turning scroll
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`is made into the form where the slash part was deleted, and in this example, the
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`compression space A is made to carry out discharge starting ahead of the compression
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`space E. Namely, the time when the outer side surface winding start part of the lap 8h
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`of a turning scroll separates from the inner side surface of lap 2b of a fixed scroll, The
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`outer side surface winding start part of lap 2b of a fixed scroll carries out earlier than
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`the time to separate from the inner side surface of the lap 8h ofa turning scroll, and the
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`compression space A is made to carry out discharge starting ahead of the compression
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`space E. The minimum sealed volume in front of the discharge starting of the
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`compression space A and B differs, as shown in Fig.3 (d) and (e). Although the
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`compression space A carries out discharge starting because the outer side surface
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`winding start part of the lap 3b of a turning scroll separates from the inner side surface
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`of lap 21) of a fixed scroll, and the outer side surface of the lap 3b of a turning scroll
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`

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`intersects the discharge port 13 after that in this example, The Compression space A may
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`be mad e to carry out discharge starting becaause the outer side surfses of thelap 21b of a
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`turningscroll intersects the discharge port 13 by the position of the discharge po1t 13,
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`or change of a size.
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`ltltllillThe pressure variation of the compression space A and R in this example is
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`described with reference to Fig.5. By carrying out
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`injection,
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`the pressure of the
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`compression space A and .8 becomes higher than the case where he has no injection.
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`Although the injection hole opening section to the compression space A an d B is.
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`substantially the same, since the direction of the compression space A carries out
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`injection at the time of a pressure lower than the compression space B, there are many
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`amounts of injections and a pressure becomes high. Since discharge starting is
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`simultaneous in a Prior art and minimum scaled volume is the same, lotthe discharge
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`starting state.suitable for the compression space 3,1 e., the state where neither fault
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`compression nor insuf1cient compression has the compression space l3, (pressure
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`variation shown in efgd of Fig.5), Although the compression space A serves as fault
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`compression (abchgd of Fig.5) or
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`the compression space B serves as insufficient
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`compression (eficgd of Fig. 5) also in the state of the discharge starting suitabl-e for the
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`compression space A (abcd of Fig.5), in this example, since the minimum sealed volume
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`of the ct1mpression space13A with a large pressure buildup by injection was enlarged f1om
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`the compression space B,
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`the pressure at the time of discharge starting becomes
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`equivalent, and the compression space A and B can reduce fault compression and
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`insufficient compression like abcd of Fig.5, and efgd. Since the discharge starting time
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`of the compression space A and B was changed, discharged gas flow rate is equalized and
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`reduction of a discharge pressure loss can be aimed at rather than discharging
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`“ multaneously.
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`lQQZOlNext, the second Example of the present inventionis described with reference to
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`the Fig.8 to Fig.6. Fig.8 is the explanatory View in the second Example of the. present
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`invention which combined the lap of the turningscroll W1th the iixed scrroll Fig.7 is‘-the
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`figure which describes operation of the compression space A and B in the scroll
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`compressor ofF1g1.8 l11g. 8is an indicator diaga am which d escrilies the pressure ya:ia tion
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`of the compression space A and B in the scroll compressor of Fig.6.
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`ltltlle”Fig 6 has extended the winding finish oi thesinner side suiriace of lap 2b eta fixed
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`scroll about 180 degree to Fig.2. Since the winding start part of the lap 3b of a turning
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`scroll is largely deleted rather than Fig.2 so that it may mention below, the form of the
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`winding start part of the position of the discharge port iii, a size, and lap 2b of a fixed
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`roll differs from Fig.2
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`

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`{0022:The state in which th e ((impression space A and B carries out a compression start,
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`respectively, (c), and (d) (a) of Fig.7, and (h), The compression space A and B shows the
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`state in which the injection hole is carrying out the opening to the compression space A
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`and B, r 1spectively, (e), and (f), r 1spectively, and the state in front of discharge starting
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`by revolution of the turning scroll
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`.3, The volume of the compression space A and l3
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`decreasesin order of (antb), (c) d), (e), and (f), and each pressure rises. However, since
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`the compression space B carries out a compression start by (h), it is not describing the
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`sign B by is). Since discharge starting of the compression space A is carried out by (e), it
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`has shifted to the discharging stroke in (f), and since it is not compression space any
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`longer, the sign Ais not described in this example, as shown in Fig 7(a) and (h), the
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`compression start periods of the compression space A an d B differ 1— the compression
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`space A and B -- each maximum sealed volume which carries out a compression start
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`differs, The winding start part of the lap ills of a turning scroll is largely deleted rather
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`than Figxl, and the compressionsspace A11s made to carry out discharge starting rather
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`than l1ig 3 early more nearly further than the compression space B so that 111g 3 and
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`Fig.7 may be compared and understood Namely, the time when the outer side surface
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`winding start part of the lap 3h of a turning scroll separates from the inner side surface
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`of lap 2h ofa fixed scroll, it carries out early more nearly further than the time when the
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`outer side surface winding start part of lap 211 of a fixed scroll separates from the inner
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`sidesurfate of the lap 3b of a turning scroll, and the compression space A is made to
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`carry out discharge starting early more nearly further than the compression space E.
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`Therefore, discharge starting times differ largely rather than the Example of Fig 3, an
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`it ca11 aim at reduction of a discharge pressure loss now more effectively,
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`liltl23l in this example, like a first Example, the outer side surface winding start part of
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`the lap 3b of a turning scroll, Although the compression space A carries out discharge
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`starting by separating from theinner side surface oflap 2b of a fixed scroll and the o1--1ter
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`side surface of thel ap311 of a tin ning scroll intersects the discharge port 13 after that,
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`Since the time when the outer side surface winding start part ofUhe'1a 3b of a turning
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`scroll separates from the inner side surface of lap 2b of a fixed scroll is earlier than a
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`first Example, the winding start part form ofthe position of the discharge port 13, a size,
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`and lap 2b of a fixed scroll differs from the first Example. Also in this example, the
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`compression space A may be made to carry out discharge starting because the outer side
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`surface of the lap 3b of a turning scroll intersects the discharge port 13 by the position
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`of the discharge port 13, or change ofa size.
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`ltlflfiéll’l‘he pressure variation of the compression space A and B in this example is
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`described with reference to Fig18. Since the compression space A carries out a
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`

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`compression start earlier than the compression space B, the pressure at the time of
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`injection becomes close to the pressure at the time of the injection of the compression
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`space E rather than the case of Fig.5. Therefore, although the balance of the amount of
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`injections becomes good, When discharge starting is made simultaneous like a prior art,
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`ln the discharge starting state suitable For the compression space R, i.e., the state where
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`neither fault compression nor insufficient compression has the compression space E,
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`(pressure variation shown in efgd of Fig.8), Although the compression space A serves as
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`fault compression (abchgd of Fig.8) or the compression space B serves as insufficient
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`compression (eficgd of Fig.8) also in the state of the discharge starting suitable for the
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`compression space A (abcd of Fig.8), in this example, from a first Example, further, since
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`the minimum sealed volume of the compression space A with large maximum sealed
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`volume at the time of an early and compression start was enlarged from the minimum
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`sealed volume of the compression space B, a compression start period, The pressure at
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`the time of discharge starting becomes equivt lent, and the compression space A and B
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`:an reduce fault compression and insufficient compression. like abcd of Fig.8, and efgd.
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`ltlil25lln this example, rather than a first Example, the discharge starting times of the
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`compression space A and B differ largely, and it can aim at reduction of a discharge
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`pressure loss more effectively.
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`[GGZGlAlthough the injection hole carried out the opening to the compression space A and
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`B alternately by one and the case where between periods of dilation was substantially
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`the same was shown in the above lst and the second Example, An injection hole carries
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`at an opening to the compression space A and B alternately, and even when between
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`periods of dilation is not the same, Even when one injection hole carries out an opening
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`only to compression space el‘ one of the two, and even when a plurality oi'injeetion holes
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`carry out an opening to the compression space A and B, respectively and between periods
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`of dilation is not the same, by changing a discharge starting time, Or by changing
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`minimum sealed volume, reduction oi" the pressure unbalance at the time of discharge
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`starting and reduction of a discharge pressure loss can be aimed at. A plurality of
`(I)
`injection holes carry out an opening to the compre sion space A and B, respectively, and
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`even when between periods ol’ dilation is the period, reduction oi" a discharge pressure
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`loss can be aimed at.
`
`U)
`ltlcl27llt may not be 180 degree although the compres ion start period was changed abou
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`L"?
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`180 degree in the 2nd Example of the above.
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`{DOESlAlthough not described in detail in the above lst and the second Example,
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`selection of a discharge starting time, minimum sealed volume, a compression start
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`period, and maxi um sealed volume is still better to take into consideration leakage of
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`

`

`the gas from the crevice between the iixcd seroiis and turning scroiis by the pressure
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`differentia1 of each compression spnce.
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`100291
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`[Effect of the 1nvention1AAs described1n deta11ssahove, arcording to the present invention,
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`the iinha1ance of the pressure at the time of the discharge starting which occurs when
`r
`injection is carried out can he reduced, and a discharge pressure 1oss can be reduced, and
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`an efficient scroii compressor ca n he provided.
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`DESCRIPTION OF DRAWINGS
`
`[Brief Description of the Drawings1
`
`A 11718, 11 Drawing of 1o ngitudi-1na section 01 the scro11 compressor concerning the!first
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`131x3mp1e oi" the present invention is shown including reiation with en exampie of” a
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`refrigerating cycie.
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`A 1F1G. 21 it is the expianatory View in the scroii compressor of Fig.1 which combined
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`the lap of the turning scroii with the fixed scr J11,
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`A 1F1G 31 1t is the fi gure which describes operation ofhe compression space A and B in
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`the ero111 coniresir
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`roi11‘11;; 1.
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`A 1F1G. 41 It is the8figure showing the form of the hp Winding start part 01" the turning
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`scroii in the scroii compressor of Fig.1,
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`A {Fifi}. 51 it is an indicator diagram which describes the pressure variation oi" the
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`compressionspar,ce A and B in thescroi1 compressor of Fig. 1
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`A 1F1G. 61 1t is the expianatory View in the second Exampie of the present invention
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`which combined the lap of the turning scroli with the fixed scro11.
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`A 1191611 71 it is the figure which describes operation of the compression space A and 13 in
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`the scrL111 compress roi 11‘11;; 6.
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`A 1F1G. 81 1t is an indicator diagram which describes the pressure variation of the
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`compression space A and B in the scri11 compressor of Figfi.
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`1131xpianations of1etters or niimeraisi
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`A B -- compression space, 1 -- we‘d-closed container, 2 —- fixed scro11, 3 -- turning scroii, 23
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`and Se -- a base piste, Zh, .1111de -- a hip and 3c ".11s'0t and 1 -- a frame -- 5 -- crankshaft,
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`5 a " eccentric part 5 " {)1dham ring '7' " heai111g, 8 a<1tor 9 “' rotor, 10 " suction pipe,
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`11 -- suction opening, 13 " discharge opening, 1/1 -- injection hole, 16 -- injection pipe, 1'7
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`-- check veive, 18 -- discharge pipes, 21 -- hoit
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`

`

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