CN1727680A

CN1727680A - Vortex compressor

Info

Publication number: CN1727680A
Application number: CNA2005100873193A
Authority: CN
Inventors: 渡边义实; 后藤和彦; 松本康臣
Original assignee: Aisin Seiki Co Ltd; Sanden Corp
Current assignee: Sanden Corp; Aisin Corp
Priority date: 2004-07-28
Filing date: 2005-07-28
Publication date: 2006-02-01
Anticipated expiration: 2025-07-28
Also published as: KR20060048832A; JP4494111B2; KR100697169B1; CN100416102C; JP2006037867A

Abstract

The aim of the invention is to improve the compression ratio of a scroll compressor and decrease a power loss due to supercompression. A fixed scroll and a moving scroll on which spiral laps are erected on the inner surfaces of end plates and, respectively, are combined together and compression chambers moved to the central side as a volume is decreased are formed between the two laps. An inner peripheral surface of one lap consists of a first part composed of a part of an inner spiral surface slidably contacting with an outer peripheral surface of the other lap; a recessed circular arc-shaped second part continuously connected to the first part and slidably contacting with a small circular face at the tip on the central side of the other lap; a fourth part positioned further on the outside in a radial direction than the extension face of the second part and connected to a small circular arc face; and a third part discontinuously connected to the second part and rapidly outwardly separated from the extension face of the second part and connected to the fourth part.

Description

Scroll compressor

Technical field

The present invention relates to a kind of scroll compressor, relate in particular to a kind of scroll compressor of the power loss that has improved compression ratio and reduced to cause by overcompression.

Background technique

As the scroll compressor of the power loss that has reduced to cause, have and a kind ofly open in the 2000-120565 communique (patent documentation 1) technology that discloses the Japan Patent spy by overcompression.It is a kind of following scroll compressor: promptly, be a kind of make to have at central part erect the fixed eddy plate that is provided with the vortex shape clinch that forms by involute curve on the end plate of tap hole, and with the opposed end plate of this fixed eddy plate on erect the rotation whirlpool be provided with the vortex shape clinch that forms by involute curve and coil and be meshed, thereby constitute respectively scroll compressor by a plurality of a pair of pressing chambers of forming, it constitutes: the beginning of each whirlpool dish clinch is revolved part, revolve the external arc that a little is connected sleekly by the clinch front end and the beginning of outside involute curve, and revolve the interior circular arc that a little is connected discontinuously with the beginning of inboard involute and form, and the central point of external arc is arranged at by the beginning of outside involute curve and revolves in the wiring of basic circle a little, and external arc and the contact of interior circular arc then are arranged on the straight line of central point of the central point that is connected external arc and interior circular arc.Can obtain following effect according to this formation: promptly, can enlarge each pressing chamber and be communicated with gas passageway afterwards with the central compartment that is formed with tap hole, reduce the power loss of following the overcompression that causes by discharging resistance, thereby reduce the increase of compressor input, improve compressor efficiency.

[patent documentation 1] Japan Patent spy opens the 2000-120565 communique

(paragraph [0006], paragraph [0015], Fig. 2～Fig. 4)

Yet, in the conventional art that comprises patent documentation 1, exist following problem: promptly, want to improve under the situation of compression ratio at the cylinder diameter that does not increase scroll compressor, be necessary the vortex of whirlpool dish is extended to center side and the starting point of vortex is shifted to an earlier date, but so, the central compartment will narrow down, and be difficult to guarantee the area that is communicated with between each pressing chamber and the central compartment, and the reduction effect of discharging resistance will become insufficient, and the power loss that is caused by overcompression will increase.In addition, if for guaranteeing that each pressing chamber enlarges interior circular arc with the area that is communicated with between the central compartment, then can produce the less thick of whirlpool dish clinch center side front end, and cause the problem of the strength deficiency of this part.

Below utilize Figure 10 of expression patent documentation 1 conventional art before, this problem is described in further details.This scroll compressor is formed by a pair of fixed side whirlpool dish clinch 1 and movable side whirlpool dish clinch 2, and is assembled into movable side clinch 2 not rotations, and with respect to 1 rotation of fixed side clinch.The inner peripheral surface 1b of fixed side clinch 1 is with movably the outer circumferential face 2a of side clinch 2 and the inner peripheral surface 2b of movable side clinch 2 and the outer circumferential face 1a of fixed side clinch 1 connect mutually in many places, between them, form a plurality of pressing chamber T1, T2 respectively, and at central part, between the inner peripheral surface 2b of the inner peripheral surface 1b of fixed side clinch 1 and movable side clinch 2, form the T3 of central compartment, be formed with tap hole 5 in the T3 of central compartment upper shed at the end plate (omitting diagram) of fixed side clinch 1.

Fixed side clinch 1 is made up of outer circumferential face 1a, inner peripheral surface 1b and the roundlet cambered surface 1c that connects the center side front end of these two side face 1a, 1b continuously.Outer circumferential face 1a is with the round 1d of the double dot dash line part as the involute of basic circle, and becomes the beginning with the tie point Q1 of roundlet cambered surface 1c and revolve a little.Inner peripheral surface 1b, by being vortex face 1b1 with the common round 1d of outer circumferential face 1a as the part of the involute of basic circle and being connected this vortex face 1b1 continuously and the short plane 1b2 of roundlet cambered surface 1c forms, and revolve a little with the beginning that the tie point Q2 of plane 1b2 becomes vortex face 1b1.The shape of movable side clinch 2 and the shape of fixed side clinch 1 are basic identical.

As shown in figure 10, if movable side clinch 2 not rotations, and with respect to 1 rotation of fixed side clinch, then the center Q4 of the roundlet cambered surface 2c of movable side clinch 2 is the center with central axis O1 just, with the radius rotation identical with turning radius, accompany therewith, two pressing chamber T1, move to center side when the T2 volume reduces gradually, and compression is enclosed in its gas inside.Arrive the position of double dot dash line 2A when movable side clinch 2, and after the beginning of its outer circumferential face 2a revolves the closing position Q5 of inner peripheral surface 1b that a some Q1 arrives fixed side clinch 1, shown in double dot dash line 2B, 2C, movable side clinch 2 breaks away from the inner peripheral surface 1b of fixed side clinch 1, thus, through the access that between the roundlet cambered surface 2c of this inner peripheral surface 1b and movable side clinch 2, forms, and in each pressing chamber T1, T2 compressed gas, be fed in the T3 of central compartment.Dotted line c among Fig. 8 represents the variation characteristic of the connection area of this access with respect to the angle of rotation of movable side clinch 2.Shown in this dotted line c, be communicated with area between the roundlet cambered surface 2c of the inner peripheral surface 1b of fixed side clinch 1 and movable side clinch 2, in slowly increase of closing position Q5 place beginning.So just, exist following problem: promptly since begin to discharge between back each pressing chamber T1, T2 and the T3 of central compartment to be communicated with area insufficient, thereby the gas in each pressing chamber T1, T2 pressing chamber will be by overcompression, thus the generation power loss.

In this external scroll compressor shown in Figure 10, do not want to improve under the situation of compression ratio not increasing cylinder diameter, be necessary to make the beginning of outer circumferential face 1a, the 2a of each

whirlpool dish

1,2 to revolve a Q1 near basic circle 1d, and outer circumferential face 1a, 2a are extended to center side, and the closing position Q5 of inner

peripheral surface

1b, 2b is moved to center side.Yet so just exist following problem: promptly, the T3 of central compartment will narrow down, and revolve after a Q1 crosses closing position Q5 in the beginning, and the access between each pressing chamber T1, T2 and the T3 of central compartment will be difficult to guarantee, and will be increased by the power loss that overcompression causes.

To this, in patent documentation 1, owing to be provided with the beginning of the inboard involute of clinch and revolve the interior circular arc that point (the closing position Q5 that is equivalent to Figure 10) is connected discontinuously, and should in circular arc more be positioned at the outside than the prolongation that revolves a little from the beginning further towards the inboard involute of basic circle, thereby be rotated at rotation whirlpool dish, and the beginning of outside involute curve revolves near the closing position that has a little surpassed inboard involute i.e. beginning and revolves under a little the state, the beginning of outside involute curve revolve a little and the interior circular arc of inboard involute between the gap, will be greater than this gap of the prior art before this of circular arc in not being provided with, thus above-mentioned effect can be obtained.Yet, in the technology of above-mentioned patent documentation 1, for fully guaranteeing to discharge the gas passageway area after the beginning, thereby fully prevent overcompression, be necessary to make the thickness of the central side front end of clinch, be far smaller than the thickness that revolves a little more forward clinch than the beginning of inboard involute, thereby considering under the situation of durability, the intensity of this central side front end is just not enough, the power that causes with the slip of the other side's side whirlpool dish and by pressurized gas etc. and cause the danger of damage just to strengthen.

In addition, improve compression ratio as desiring not increase cylinder diameter, then same with prior art shown in Figure 10, be necessary to make the beginning of clinch outside involute to revolve point (beginning that is equivalent to Figure 10 is revolved a Q1), and beginning of inboard involute revolved a little move to center side near center side.Yet so, the central compartment will narrow down, access between each pressing chamber and the central compartment will be difficult to guarantee, if for overcome this point make with the beginning of involute revolve the interior circular arc that a little is connected discontinuously further be positioned at the outside, then the thickness of clinch central side front end causes the dangerous of damage further to increase to this front end further attenuation.

Summary of the invention

The objective of the invention is to, inner peripheral surface formation and the concaved circular cambered surface that the front end of another clinch of relative its rotation connects slidably at clinch solve above-mentioned each problem thus.

For this reason, scroll compressor of the present invention, make at the inner face of fixed side end plate and erect the fixed eddy plate that is provided with vortex shape fixed side clinch, but with erect the movable orbiting scroll that is provided with the movable side clinch of vortex shape at the inner face of movable side end panel and can make up rotatably mutually, so that outer circumferential face of one of two clinchs and another inner peripheral surface connect slidably, thereby between these two clinchs, form at least one pair of pressing chamber, but this pressing chamber is accompanied by movable orbiting scroll when reducing gradually with respect to the rotation volume of fixed eddy plate to the central compartment of the central part that is formed at two clinchs one side shifting, and, in the outer circumferential face and inner peripheral surface of each clinch, at least its part is formed by outer vortex face and inside vortex face, and the center side front end that connects them via the roundlet cambered surface, this scroll compressor is characterised in that: the inner peripheral surface of the clinch of one of two whirlpool dishes of rotation is by forming with the bottom mutually, that is: first portion, its part by the inside vortex face that the outer circumferential face with another clinch connects slidably forms; The second portion that concave circular arc is planar, it is connected continuously with this first portion, and connects slidably with the little arc surface of another clinch center side front end; The 4th part, it is positioned at the outside than the more close radial direction of elongated surfaces of this second portion arc surface, and is connected with the roundlet cambered surface; Third part, it is connected discontinuously with second portion, and sharply stretches out and be connected with the 4th part from the elongated surfaces of the arc surface of this second portion.

Above-mentioned scroll compressor preferably constitutes, the outer circumferential face of each clinch that forms by outer vortex face, revolve a little in the beginning of vortex and to be connected continuously with little arc surface, the first portion of each clinch inner peripheral surface, since forming in a side opposite near first closing position with central authorities, this first closing position is the position of revolving the inside vortex face that a little begins to leave clinch with respect to the outer circumferential face of another clinch of this clinch rotation in the beginning, the second portion of inner peripheral surface, with with the rotating center axis at the roundlet cambered surface center of another clinch center side front end arc surface as the center, be connected continuously with center side and form near beginning first closing position of first portion, the 4th part is formed by the part of inside vortex face, and third part is the concave arc surface that is connected with the 4th partial continuous.

Above-mentioned scroll compressor preferably constitutes, the 4th part, a part that replaces by the inside vortex face forms, but concave arc surface, this concave arc surface is positioned at than the more close radial direction of inside vortex face inboard in roundlet cambered surface side, and is positioned at than the more close radial direction of the inside vortex face outside in third part one side.

Above-mentioned scroll compressor preferably constitutes, inner face at each whirlpool dish end plate, part at the periphery of removing the tap hole that is formed at the end plate central part and each clinch, form the shallow recess of depositing, be provided with wearing strip in this deposits recess, to deposit concave depth identical or thicker slightly than it with this for its thickness.

As mentioned above, according to the present invention, mutually the inner peripheral surface of the clinch of one of two whirlpools dishes of rotation is by forming with the bottom, that is: first portion, and its part by the inside vortex face that the outer circumferential face with another clinch connects slidably forms; The second portion that concave circular arc is planar, it is connected continuously with this first portion, and connects slidably with the little arc surface of another clinch center side front end; The 4th part, it is positioned at the outside than the more close radial direction of elongated surfaces of this second portion arc surface, and is connected with the roundlet cambered surface; Third part, it is connected discontinuously with second portion, and sharply stretch out and be connected with the 4th part from the elongated surfaces of the arc surface of this second portion, therefore, even the little arc surface of the center side front end of another clinch leaves the inside vortex face of the clinch of one of two whirlpool dishes of mutual rotation, this little arc surface also can connect slidably with the planar second portion of the concave circular arc of a clinch, and pressing chamber is not communicated with the central compartment, surpass until little arc surface till the attachment portion of second portion and third part, after little arc surface surpasses this attachment portion, just begin to be communicated with.Promptly, because the little arc surface of another clinch leaves the center side front end of the position of a clinch inner peripheral surface near two clinchs, thereby compression ratio improves, and owing to third part is connected discontinuously with second portion, and sharply stretch out from the elongated surfaces of this arc surface, thereby the area that is communicated with between pressing chamber and the central compartment just sharply increases, so can reduce the power loss that caused by overcompression.In addition since the beginning that needn't change the outer vortex face of existing clinch outer circumferential face revolve a little, thereby the central compartment does not narrow down, so the thickness of central side front end that needn't the attenuate clinch, and the sorrow of the reduction in strength of this front end not.

The outer circumferential face of each clinch that is formed by outer vortex face revolves a little in the beginning of vortex and to be connected continuously with little arc surface; The first portion of each clinch inner peripheral surface, since forming in a side opposite with central authorities near first closing position, this first closing position is the position of revolving the inside vortex face that a little begins to leave clinch with respect to the outer circumferential face of another clinch of this clinch rotation in the beginning; The second portion of inner peripheral surface with the rotating center axis at the roundlet cambered surface center of another clinch center side front end arc surface as the center, is connected continuously with center side and forms near beginning first closing position of first portion; The 4th part is formed by the part of inside vortex face; Third part is the concave arc surface that is connected with the 4th partial continuous, according to invention as described above, the third part of the inner peripheral surface of each clinch is connected with the 4th partial continuous ground, and the whole concave arc surface that forms slyness, and the gas that flow in the central compartment from the access that forms is carried out slick and sly guiding between the little arc surface of the third part of the inner peripheral surface of a clinch and another clinch center side front end, thereby, whole effects in foregoing invention, also can reduce the energy loss that causes by air whirl.

The 4th part, replacement is formed by the part of inside vortex face, but form by concave arc surface, this concave arc surface is positioned at than the more close radial direction of inside vortex face inboard in roundlet cambered surface side, and be positioned at than the more close radial direction of the inside vortex face outside in third part one side, according to invention as described above, the little arc surface of another clinch front end surpasses after the attachment portion of the second portion of an inner peripheral surface and third part, access area between pressing chamber and the central compartment and pushing the speed just greater than above-mentioned two kinds of occasions, thereby can further reduce the power loss that causes by overcompression, and owing to the thickness of clinch front end increases, thereby can further improve the intensity of this front end.

Inner face at each whirlpool dish end plate, part at the periphery of removing the tap hole that is formed at the end plate central part and each clinch, form the shallow recess of depositing, in depositing recess, this is provided with wearing strip, to deposit concave depth identical or thicker slightly than it with this for its thickness, according to invention as described above, can reduce the gap between the end face of the movable side clinch that tap hole periphery that end plate inner face at whirlpool dish is not provided with wearing strip and another whirlpool coils.The existence in this gap becomes the reason that produces following situation, that is: before a roundlet cambered surface of clinch arrives the attachment portion of another second portion and third part, the central compartment will be communicated with pressing chamber, gas in the central compartment is adverse current in the pressing chamber that does not reach the regulation delivery pressure as yet just, yet, according to invention as described above,, can reduce the power loss of the scroll compressor that causes because of such adverse current by reducing the gap.

Description of drawings

Fig. 1 is the explanatory drawing of the whirlpool dish central part shape of scroll compressor the 1st mode of execution that the present invention relates to.

Fig. 2 is the front section view of the 1st mode of execution central part shown in Figure 1.

Fig. 3 is the 3-3 sectional view of Fig. 2.

Fig. 4 is the explanatory drawing of the whirlpool dish central part shape of scroll compressor the 2nd mode of execution that the present invention relates to.

Fig. 5 is the front section view of the 2nd mode of execution central part shown in Figure 4.

Fig. 6 is the 6-6 sectional view of Fig. 5.

Fig. 7 is the amplification view along the 7-7 line of Fig. 5.

But Fig. 8 is communicated with the figure of area with respect to the variation characteristic of the angle of rotation of movable orbiting scroll between expression pressing chamber and the central compartment.

Fig. 9 is the accompanying drawing that is equivalent to Fig. 7 in prior art one example.

Figure 10 is the explanatory drawing of prior art mesoscale eddies compressor one example.

Symbol description:

10... fixed eddy plate 11... fixed side end plate 11a... inner face

11b... deposit recess 12... fixed side clinch 12a... outer circumferential face

12b... the inner peripheral surface 12b1... 12b2... of first portion second portion

12b3... the little arc surface of third part 12b4... the 4th part 12c...

14... arc surface 15... tap hole 18... wearing strip

But 20... the movable side end panel 21a... inner face of movable orbiting scroll 21...

21b... deposit the movable side clinch of recess 22... 22a... outer circumferential face

22b... inner peripheral surface 22c... roundlet cambered surface 28... wearing strip

H1... outer vortex face (outer involute surface) H2... inside vortex face (interior involute surface)

O1... the central axis P1... beginning is revolved a P1 P4... center

P5... the first closing position S1, S2... pressing chamber S3... central compartment

Embodiment

At first, according to Fig. 1～Fig. 3, the 1st mode of execution of the scroll compressor that the present invention relates to is described.Mainly as shown in Figures 2 and 3, the scroll compressor of present embodiment, but by fixed side end plate 11 and within it face 11a erect the vortex shape fixed side clinch 12 formed fixed eddy plates 10 that are provided with and movable side end panel 21 and within it face 21a erect the movable side clinch 22 formed movable orbiting scrolls 20 of vortex shape that are provided with and form.But movable orbiting scroll 20 is assembled into: the peripheral part of the inner face 21a of this movable side end panel 21 and the upper-end surface of erectting the side perisporium (omitting diagram) that is provided with in the whole periphery of fixed side end plate 11, airtight and connect with being free to slide, and not rotation ground is with respect to fixed eddy plate 10 rotations.These two

whirlpool dishes

10,20 are combined into: the inner peripheral surface 12b of fixed side clinch 12 and the outer circumferential face 22a of movable side clinch 22 can connect in many places with sliding over each other, and between them, form a plurality of first pressing chamber S1, and the inner peripheral surface 22b of the outer circumferential face 12a of fixed side clinch 12 and movable side clinch 22 can connect in many places with sliding over each other, and forms a plurality of second pressing chamber S2 between them.But these two pressing chamber S1, S2 are accompanied by the rotation of movable orbiting scroll 20 relative fixed whirlpools dish 10, move to central side when volume reduces gradually, and compression is closed in its gas inside.

At the central part that is in two

clinchs

12,22 between two

end plates

11,21, between two inner

peripheral surface

12b, 22b, form the S3 of central compartment, and on the fixed side end plate 11 that joins with the S3 of this central compartment, but on the spin axis direction of movable orbiting scroll 20, connect and be formed with the circular row that has a circular spot-facing 15a of portion in inner face 11a side and portal 15.At the outlet side of tap hole 15, be provided with the leaf valve 17 of allowing the gas outflow but stoping inflow.In addition, on the inner face 21a of the movable side end panel 21 of joining with the S3 of central compartment, only be formed with the spot-facing portion 25a same with the 15a of spot-facing portion.

Next with reference to Fig. 1, the shape of each

clinch

12,22 is described.Although following illustrated be the shape of fixed side clinch 12, under the occasion of symmetric figure whirlpool dish, the shape of two

clinchs

12,22 is identical.Fixed side clinch 12, form by outer circumferential face 12a, inner peripheral surface 12b and the roundlet cambered surface 12c that connects the center side front end of this both 12a, 12b, outer circumferential face 12a and inner peripheral surface 12b, outer involute surface (outer vortex face) H1 and interior involute surface (inside vortex face) H2 by shared basic circle H forms basically.The outer involute surface H1 of outer circumferential face 12a revolves a P1 since the beginning, and the prolongation of the basic circle H of the outer involute surface H1 of arrival that is omitted is represented in double dot dash line.Outer circumferential face 12a the beginning revolve a P1 and roundlet cambered surface 12c continuously (sleekly) be connected.

The inner peripheral surface 12b of fixed side clinch 12 is by from the lateral center side and the continuous 12b1 of first portion, second portion 12b2, third part 12b3, the 4th part 12b4 and the 5th part 12b5 forms.The 12b1 of first portion of the inner peripheral surface 12b of fixed side clinch 12 is the part of interior involute surface H2, be formed on a side opposite with central authorities since the first closing position P5, this first closing position P5 for respect to fixed side clinch 12 to the outer circumferential face 22a of the movable side clinch 22 of direction of action rotation this beginning revolve a P1 leave in the position of involute surface H2.The second portion 12b2 of inner peripheral surface 12b, with with the central axis O1 of the rotational circle 13 of the roundlet cambered surface 22c center P 4 of movable side clinch 22 center side front ends arc surface 14 as radius centered r1, the first closing position P5 from the 12b1 of first portion, connect continuously and form to center side, and arrive the second closing position P6.The radius r 1 of second portion 12b2 is the radius of rotational circle 13 of center P 4 of roundlet cambered surface 22c and the radius sum of roundlet cambered surface 22c.Owing to adopt above-mentioned formation, thereby, after crossing the first closing position P5, still connect slidably with this second portion 12b2 with respect to the roundlet cambered surface 22c of movable side clinch 22 front ends of fixed side clinch 12 rotations.

The 4th part 12b4, by the extending portion of the 12b1 of first portion promptly in the part of involute surface H2 form, thereby begin to stretch out from the elongated surfaces of the arc surface 14 of second portion 12b2.Third part 12b3 is a kind of concaved circular cambered surface, this concaved circular cambered surface is provided with big angle and is connected discontinuously with second portion 12b2 at the second closing position P6, and sharply stretches out and be connected continuously with the 4th part 12b4 from the elongated surfaces of the arc surface 14 of second portion 12b2.The 5th part 12b5 is the short plane that is connected continuously with the 4th part 12b4 and roundlet cambered surface 12c.The 4th part 12b4 is not limited to concaved circular cambered surface, also can be suitable concave arc surface.In addition, the 5th part 12b5 is not limited to the plane, also can be mild concave arc surface, perhaps, also can omit the 5th part 12b5, and the 4th part 12b4 directly is connected with roundlet cambered surface 12c.In addition, promptly on the second closing position P6, the radius of a little can be set also at the joint of second portion 12b2 and third part 12b3.

The 15a of spot-facing portion of tap hole 15, on the inner face 11a of the fixed side end plate 11 that joins with the S3 of central compartment, form, but watch rounded from the spin axis direction of movable orbiting scroll 20, it surrounds tap hole 15, and eccentric and form to the first closing position P5 direction of the interior involute surface H2 of the fixed side clinch 12 of fixed side end plate 11, and the degree of depth is certain.The 15a of this spot-facing portion is shown in the double dot dash line 22A of Fig. 2, under near revolving the first closing position P5 of inner peripheral surface 12b that a P1 is positioned at clinch 12 in the beginning of the outer circumferential face 22a of clinch 22 the state, be not communicated with pressing chamber S1, but shown in double dot dash line 22B, if roundlet cambered surface 22c crosses the second closing position P6, just be communicated with pressing chamber S1, but also can pass through the 15a of this spot-facing portion, and pressing chamber S1 is communicated with the S3 of central compartment.The formed spot-facing 25a of portion is not except having tap hole on the movable side end panel 21, and its position relation with respect to movable side clinch 22 is identical with the 15a of spot-facing portion.

In the 1st mode of execution of above-mentioned formation, as shown in Figure 2, but if movable orbiting scroll 20 not rotations, and with respect to fixed eddy plate 10 rotations, then the center P 4 of the roundlet cambered surface 22c of movable side clinch 22 is rotated along the rotational circle 13 that with central axis O1 is the center, accompanies two pressing chamber S1, S2 therewith, move to center side when volume reduces gradually, and be compressed in the gas of its enclose inside.The position that surpasses double dot dash line 22A when movable side clinch 22, and after its beginning revolves the first closing position P5 of interior involute surface H2 of fixed side clinch 12 that a P1 crossed the closing position Q5 that is equivalent to prior art shown in Figure 10, the roundlet cambered surface 22c of movable side clinch 22 still connects slidably with the second portion 12b2 of the inner peripheral surface 12b of fixed side clinch 12, thereby the gas in the pressing chamber S1 is compressed.Like this, after movably the roundlet cambered surface 22c of side clinch 22 arrives the second closing position P6 of the inner peripheral surface 12b of fixed side clinch 12, shown in double dot dash line 22C, the roundlet cambered surface 22c of movable side clinch 22 just breaks away from from the inner peripheral surface 12b of fixed side clinch 12, thus, compressed gas in pressing chamber S1 just by being formed at the access between this inner peripheral surface 12b and the roundlet cambered surface 22c, is fed in the S3 of central compartment.

Equally, after revolving the first closing position P5 of interior involute surface H2 that a P1 crosses movable side clinch 22 in the beginning of fixed side clinch 12, gas in the pressing chamber S2 also is compressed, and when the roundlet cambered surface 12c of fixed side clinch 12 moves along the second portion 22b2 of movable side clinch 22, and after arriving the second closing position P6, access between the inner peripheral surface 22b by being formed at this movable side clinch 22 and the roundlet cambered surface 12c of fixed side clinch 12 is fed in the S3 of central compartment.The dot and dash line a of Fig. 8, be illustrated in form between each inner

peripheral surface

12b, 22b and roundlet cambered surface 22c, the 12c and be communicated with pressing chamber S1, S2 and the S3 of central compartment access be communicated with the variation characteristic of area with respect to the angle of rotation of movable side clinch 22.As shown in Figure 8, the variation characteristic c of the connection area of prior art shown in Figure 10 is, begin to be communicated with from closing position Q5, and be communicated with area and slowly increase, relative therewith, the connection area variation characteristic a of the 1st mode of execution is, although begin to be communicated with from the second closing position P6 that is later than closing position Q5 (=the first closing position P5), sharply increase but be communicated with area, and the increase that is communicated with area approach saturated near, caught up with the variation characteristic c of the connection area of prior art.The connection area variation characteristic a of the 1st mode of execution sharply increases and the reason of catching up with the variation characteristic c of prior art is: the 4th part 12b4 of inner peripheral surface 12b by the extending portion of the 12b1 of first portion promptly in the part of involute surface H2 form, third part 12b3 comes to be connected discontinuously with second portion 12b2 with wide-angle at the second closing position P6, and sharply stretches out from the elongated surfaces of the arc surface 14 of second portion 12b2.

As mentioned above, according to the 1st mode of execution, at each inner

peripheral surface

12b, 22b and roundlet cambered surface 22c, form between the 12c and connection pressing chamber S1, the variation characteristic a that is communicated with area of S2 and the S3 of central compartment, compare with the variation characteristic c of the connection area of prior art shown in Figure 10, be communicated with the initial position to be equivalent to the differential seat angle of the first closing position P5 and the second closing position P6, come near two

clinchs

12,22 center side front end, thereby compression ratio improves, and pressing chamber S1, S2 sharply increases with the area that is communicated with between the S3 of central compartment, so can reduce the power loss that caused by overcompression.In addition, revolve a P1 owing to needn't change the beginning of the outer involute surface H1 of existing

clinch

12,22 outer circumferential face 12a, thereby the S3 of central compartment do not narrow down, thus the thickness of central side front end that needn't the attenuate clinch, and the sorrow anxiety of the reduction in strength of this front end.In addition, owing to only need to change the length of second portion 12b2,22b2, just variable compression ratio, thereby this change is also carried out easily.In this external the 1st mode of execution, the third part 12b3 of the inner peripheral surface 12b of each

clinch

12,22 is connected continuously with the 4th part 12b4, and the whole concave arc surface that forms slyness, and by this concave arc surface, to access by between the roundlet cambered surface 22c of the third part 12b3 of the inner peripheral surface 12b of a clinch 12 and another clinch 22, forming, carry out slick and sly guiding and flow into gas in the S3 of central compartment, thereby can reduce the energy loss that causes by eddy current from pressing chamber S1, S2.

And, in the 1st mode of execution, owing to be provided with the 15a of spot-facing portion, 25a, thereby, with begin almost simultaneously by being communicated with between the pressing chamber S1, the S2 that form at the access that forms between above-mentioned each inner

peripheral surface

12b, 22b and roundlet cambered surface 22c, the 12c and the S3 of central compartment, being communicated with also between pressing chamber S1, the S2 that is formed by the 15a of spot-facing portion, 25a and the S3 of central compartment begins.

Next, with reference to Fig. 4～Fig. 7, the 2nd mode of execution of the scroll compressor that the present invention relates to is described.The difference of the 2nd mode of execution and the 1st mode of execution only is: on inner face 11a, the 21a of the

end plate

11,21 of each

whirlpool dish

10,20, be provided for preventing and with the wearing

strip

18,28 of the wearing and tearing between end face 12d, the 22d of its clinch that connects 12,22, and the 4th part 12b4 of inner peripheral surface 12b, the 22b of each

clinch

12,22, the shape of 22b4 have been changed, and changed the shape of the 15a of spot-facing portion, 25a, other formation is all identical, thereby mainly this difference is described.

As Fig. 5～shown in Figure 7, in the 2nd mode of execution, on the fixed side end plate 11 that joins with the S3 of central compartment, but on the spin axis direction of movable orbiting scroll 20, connect and be formed on the circular row that inner face 11a has the 15b of spot-facing portion and portal 15, be provided with leaf valve 17 at the outlet side of tap hole 15.But the 15b of spot-facing portion watches from the spin axis direction of movable orbiting scroll 20 and is long-round-shape, the periphery of its both sides and tap hole 15 is joined, and extend in parallel to first closing position P5 (with reference to Fig. 4) direction of the interior involute surface H2 of fixed side clinch 12, the circular arc of front end be positioned at the first closing position P5 slightly in the inner part.At the inner face 21a of movable side end panel 21, only form and the same 25b of spot-facing portion of the 15b of spot-facing portion.

Inner face 11a at fixed side end plate 11, in a part of removing tap hole 15 is the part of periphery and the fixed side clinch 12 of the 15b of spot-facing portion, form the shallow recess 11b that deposits, inner face 21a in movable side end panel 21, in the part of the periphery of removing the 25b of spot-facing portion and movable side clinch 22, be formed with the shallow recess 21b that deposits.In respectively depositing

recess

11b, 21b, the vortex

shape wearing strip

18,28 identical with its degree of depth or that form than its thick slightly thin plate (is the iron plate of 0.3mm such as thickness) by thickness is set, and itself and the bottom surface of respectively depositing

recess

11b, 21b bond.For preventing turnup, the front end 18a of these wearing

strip

18,28 center side (wearing strip 28 sides are omitted diagram) can not form pointed, and it is sizable circular-arc to be necessary to form radius, therefore, inner face 11a, the 21a of near the fixed

side end plate

11,21 it can't

help wearing strip

18,28 to cover in suitable scope.At end face 12d, the 22d of each

clinch

12,22, be provided with the sealed

department

19,29 that connects with wearing

strip

18,28.

As shown in Figure 4, the 4th part 12b4 of the inner peripheral surface 12b of fixed side clinch 12, it is near the part with the concaved circular cambered surface K of the radius r 2 of radius r 1 same degree of second portion 12b2 of having that the central axis O1 of second portion 12b2, has central axis O2, the 4th part 12b4 is in roundlet cambered surface 12c side, be positioned at position than the more close radial direction of inside vortex face H2 inboard, and in third part 12b3 side, be positioned at the position than the more close radial direction of the inside vortex face H2 outside, the end of concaved circular cambered surface K arrives the first closing position P5.Third part 12b3 and the 1st mode of execution are same, at the second closing position P6 big angle is set, and be connected discontinuously with second portion 12b2, and sharply stretch out from the elongated surfaces of the arc surface 14 of second portion 12b2, and be connected continuously with the 4th part 12b4.The third part 12b3 of the 2nd mode of execution, as mentioned above, because the 4th part 12b4 is in third part 12b3 side, be positioned at position than the more close radial direction of the inside vortex face H2 outside, thereby the 4th part 12b4 side of this third part 12b3, the 4th part 12b4 than the 1st mode of execution more stretches out from the elongated surfaces of second portion 12b2, and is positioned at the position than the more close radial direction of the involute surface H2 outside.Owing to adopt this formation, thereby the roundlet cambered surface 22c of movable side clinch 22 front ends surpasses after the attachment portion of the second portion 12b2 of inner peripheral surface 12b of fixed side clinch 12 and third part 12b3, the area of the access between pressing chamber S1, S2 and the S3 of central compartment and pushing the speed is bigger than the situation of the 1st mode of execution.In addition, the 4th part 12b4 is positioned at the position than the more close radial direction of inside vortex face H2 inboard in roundlet cambered surface 12c side, and like this, the thickness I of fixed side clinch 12 front ends is just greater than the 1st mode of execution.In addition, the 4th part 12b4 so long as following concave arc surface get final product, this concave arc surface is in roundlet cambered surface 12c side, be positioned at position than the more close radial direction of inside vortex face H2 inboard, and in third part 12b3 side, be positioned at position, and to there is no need must be a part by the concaved circular cambered surface of the first closing position P5 than the more close radial direction of the inside vortex face H2 outside.

In the 2nd mode of execution of above-mentioned formation, same with the 1st mode of execution, if but movable orbiting scroll 20 is with respect to fixed eddy plate 10 rotations, two pressing chamber S1 then, when reducing gradually, moves the S2 volume to center side, and the gas of portion's sealing within it is compressed, if the roundlet cambered surface 12c (22c) of a clinch 12 (22) crosses the second closing position P6 of the inner peripheral surface 22b (12b) of another clinch 22 (12), then the roundlet cambered surface 12c (22c) of a clinch 12 (22) just leaves the inner peripheral surface 22b (12b) of another clinch 22 (12), and at pressing chamber S1, compressed gas is fed in the S3 of central compartment just by being formed at the access between this inner peripheral surface 22b (12b) and the roundlet cambered surface 12c (22c) in the S2.

In the 2nd mode of execution, as mentioned above, among the inner peripheral surface 12b of fixed side clinch 12, the 4th part 12b4 side of third part 12b3, compare with the 4th part 12b4 of the 1st mode of execution, more stretch out from the elongated surfaces of second portion 12b2, and be positioned at than the position outside the more close radial direction of involute surface H2, too for movable side clinch 22.Therefore, the roundlet cambered surface 12c (22c) of clinch 12 (22) front ends surpasses after the attachment portion of second portion 22b2 (12b2) and third part 22b3 (12b3) of inner peripheral surface 22b (12b) of another clinch 22 (12), the area of the access between pressing chamber S1, S2 and the S3 of central compartment and pushing the speed shown in the double dot dash line b of Fig. 8, occasion greater than the 1st mode of execution, thereby, can further reduce the power loss that causes by overcompression.In addition, the 4th part 12b4 is positioned at the position than the more close radial direction of inside vortex face H2 inboard in roundlet cambered surface 12c side, and like this, the thickness I of fixed side clinch 12 front ends just increases, and therefore can further improve the intensity of this front end.

In addition, in the 2nd mode of execution,, be provided with the wearing

strip

18,28 of the wearing and tearing that prevent

inner face

11a, 21a shallow the depositing in recess 11b, the 21b that inner face 11a, the 21a of each

end plate

11,21 form.In the scroll compressor that is provided with such wearing strip 18, usually on the inner face 11c of end plate 11,21 (movable side end panel 21 sides are omitted diagram), wearing

strip

18,28 directly bonds, and between the inner face 11c of the surface of each wearing

strip

18,28 and each

end plate

11,21, the ladder that produces the thickness of slab that is equivalent to wearing

strip

18,28 is poor.Under such occasion, as be equivalent to along the amplification view of the part of the 7-7 line of Fig. 5 promptly shown in Figure 9, near the outside of wearing strip 18 front end 18a and in the scope that do not covered by wearing strip 18 of the inner face 11c of end plate 11, inner face 11c and and the end face 22d of its opposed movable side clinch 22 between, produce the gap e ' of the thickness that is equivalent to wearing strip 18.Before the roundlet cambered surface 22c of movable side clinch 22 arrives the second closing position P6 of fixed side clinch 12, as shown in Figure 9, the S3 of central compartment is communicated with by this gap e ' with pressing chamber S1, gas in the S3 of central compartment is adverse current in the pressing chamber S1 that does not reach the regulation delivery pressure as yet just, equally, by the same gap that produces between the end face 12d of the inner face of movable side end panel 21 and fixed side clinch 12, the interior gas of the S3 of central compartment is adverse current in pressing chamber S2 also.The gas of this adverse current is compressed in pressing chamber S1, S2 once more, like this, just exists the problem that produces power loss.Yet in the above-described 2nd embodiment, at each

end plate

11,21 inner face 11a, on the 21a, removing the 15b of spot-facing portion, the periphery of 25b and

clinch

12,22 part, form the shallow recess 11b that deposits, 21b, and respectively depositing recess 11b, in the 21b, it is identical with its degree of depth or than the wearing strip 18 of its thick slightly thin plate to be provided with thickness, 28, and itself and respectively deposit recess 11b, the bottom surface bonding of 21b, thereby it is promptly shown in Figure 7 as the 7-7 sectional view of Fig. 5, even at wearing strip 18, near and the end plate 11 in the outside of 28 front end 18a, in the scope that 21 inner face 11c is not covered by wearing strip 18, at

end plate

11,21 inner face 11c and clinch opposed 12 with it, 22 end face 12d, the gap e that produces between the 22d compares with above-mentioned gap e ', only dwindles to be equivalent to deposit recess 11b, the degree of depth of 21b.Like this, just reduce to the gas flow in pressing chamber S1, the S2 by gap e adverse current from the S3 of central compartment, thereby can reduce the power loss of scroll compressor.

In addition, at end plate 11, wearing strip 18 directly bonds on 21 the inner face, in 28 the structure, being compressed gas or penetrating into liquid in the S3 of central compartment when stopping in the S3 of central compartment, can enter into this wearing strip 18, the inside one side of 28 front ends, and cause this front end to float, front end after this come-up is by

clinch

12,22

end face

12d, 22d and suppress end plate 11 repeatedly, 21 inner face, and the breakage that generation is caused by fatigue, yet according at each

end plate

11,21 inner face 11a, the last formed shallow recess 11b that deposits of 21a, be provided with wearing strip 18 in the 21b, 28 structure, because the liquid that is compressed gas or penetrates in the S3 of central compartment when stopping in the S3 of central compartment enters into wearing strip 18, the possibility of the inside one side of 28 front ends reduces, thereby the generation possibility of the above-mentioned breakage that is caused by fatigue just reduces.

In the respective embodiments described above, for making a pair of

clinch

12,22 have same shape in fact, and the occasion that coil in the symmetric form whirlpool that is provided with the phase difference of 180 degree is illustrated, but the invention is not restricted to this, also revolve position and whole occasion of revolving the asymmetric whirlpool dish of position applicable to length that has changed each

clinch

12,22 or beginning.

Claims

1. scroll compressor, make at the inner face of fixed side end plate and erect the fixed eddy plate that is provided with vortex shape fixed side clinch, but with erect the movable orbiting scroll that is provided with the movable side clinch of vortex shape at the inner face of movable side end panel and can make up rotatably mutually, so that outer circumferential face of one of above-mentioned two clinchs and another inner peripheral surface connect slidably, thereby between these two clinchs, form at least one pair of pressing chamber, but this pressing chamber is accompanied by above-mentioned movable orbiting scroll when reducing gradually with respect to the rotation volume of said fixing whirlpool dish to the central compartment of the central part that is formed at above-mentioned two clinchs one side shifting, and, in the outer circumferential face and inner peripheral surface of above-mentioned each clinch, at least its part is formed by outer vortex face and inside vortex face, and via their center side front end of roundlet cambered surface connection, this scroll compressor is characterised in that:

Mutually the inner peripheral surface of the above-mentioned clinch of one of above-mentioned two whirlpools dish of rotation is by forming with the bottom, that is: first portion, and its part by the above-mentioned inside vortex face that the outer circumferential face with another above-mentioned clinch connects slidably forms; The second portion that concave circular arc is planar, it is connected continuously with this first portion, and connects slidably with the above-mentioned little arc surface of above-mentioned another clinch center side front end; The 4th part, it is positioned at the outside than the more close radial direction of elongated surfaces of this second portion arc surface, and is connected with above-mentioned roundlet cambered surface; Third part, it is connected discontinuously with above-mentioned second portion, and sharply stretches out and be connected with above-mentioned the 4th part from the elongated surfaces of the arc surface of this second portion.

2. scroll compressor according to claim 1 is characterized in that:

The outer circumferential face of above-mentioned each clinch that is formed by above-mentioned outer vortex face revolves a little in the beginning of vortex and to be connected continuously with above-mentioned little arc surface,

The above-mentioned first portion of above-mentioned each clinch inner peripheral surface, since forming in a side opposite near first closing position with central authorities, this first closing position is the position of revolving the inside vortex face that a little begins to leave above-mentioned clinch with respect to the outer circumferential face of another above-mentioned clinch of this clinch rotation in the above-mentioned beginning

The second portion of above-mentioned inner peripheral surface, with with the rotating center axis at the above-mentioned roundlet cambered surface center of above-mentioned another clinch center side front end arc surface as the center, be connected continuously with center side and form near beginning first closing position of above-mentioned first portion

Above-mentioned the 4th part is formed by the part of above-mentioned inside vortex face,

Above-mentioned third part is the concave arc surface that is connected with above-mentioned the 4th partial continuous.

3. scroll compressor according to claim 2 is characterized in that:

Above-mentioned the 4th part, replacement is formed by the part of above-mentioned inside vortex face, but concave arc surface, this concave arc surface is positioned at than the more close radial direction of above-mentioned inside vortex face inboard in above-mentioned roundlet cambered surface side, and is positioned at than the more close radial direction of the above-mentioned inside vortex face outside in above-mentioned third part one side.

4. according to any described scroll compressor of claim 1～claim 3, it is characterized in that:

Inner face at above-mentioned each whirlpool dish end plate, part at the periphery of removing the tap hole that is formed at above-mentioned end plate central part and above-mentioned each clinch, form the shallow recess of depositing, be provided with wearing strip in this deposits recess, to deposit concave depth identical or thicker slightly than it with this for its thickness.