CN101354033A

CN101354033A - Scroll compressor

Info

Publication number: CN101354033A
Application number: CNA2008101451900A
Authority: CN
Inventors: 鶸田晃; 二上义幸; 赤泽辉行; 饭田登; 泽井清; 新宅秀信; 森本敬
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2003-06-17
Filing date: 2004-06-15
Publication date: 2009-01-28
Also published as: JP2005009332A; CN101354034A; CN101354035B; JP4505196B2; CN1823226A; CN1823226B; CN101354035A; CN101354034B

Abstract

The present invention relates to a scroll compressor. A first clearance (15) in the thrust direction between the blade bottom of a stationary end plate (2b) and the blade top of an orbiting wrap portion (4a) and a second clearance (16) in the thrust direction between the blade bottom of an orbiting end plate (4b) and a stationary wrap portion (2a) are formed in shapes where the clearances progressively increase from the outer periphery side to the inner periphery side. Also, the first clearance (15) is set larger than the second clearance (16). As a result, contact surface pressure of each wrap portion (2a, 4a) is kept low in heat distortion. Further, contact pressure between the blade top of a stationary scroll part (2) and the blade bottom of an orbiting scroll part (4) is uniformly kept, so that load applied to each scroll part (2, 4) is uniformly received by a thrust surface.

Description

Scroll compressor

The application of this division is based on application number and is " 200480020054.9 ", the applying date the dividing an application for the Chinese patent application of " scroll compressor " that be on June 15th, 2004, denomination of invention.

Technical field

The present invention relates to a kind of scroll compressor, this scroll compressor makes fixed scroll member and rotary vortex rotary part engagement, forms pressing chamber, by rotatablely moving of rotary vortex rotary part, pressing chamber simultaneously changes volume, and one side moves, in view of the above, carry out suction, compression and the discharge of refrigeration agent.

Background technique

In the past, as the hermetic compressor of freezing air conditioner, reciprocating type, rotator type, eddy type are arranged, various forms all is to use in refrigerating and air conditioning field home-use, professional usefulness.Now, carried out the exploitation of performance feature separately at cost, aspect of performance etc.

Wherein, compressing mechanism and motor drive mechanism are accommodated in compressor in the container to have realized that so-called hermetic compressor soundproof and easy to maintenance is representative, scroll compressor and rotor compressor become main flow.Scroll compressor generally is to make fixed scroll member and the rotary vortex rotary part engagement that erects the scroll portion of scroll from runner plate, between both sides, form pressing chamber, make rotary vortex rotary part when the basic upper edge circular orbit that carries out the rotation restriction by the rotation limting mechanism rotates, pressing chamber simultaneously changes volume and simultaneously moves, in view of the above, suck, compress, discharge, machine oil by lubricated usefulness, to the back pressure that the peripheral part and the scroll portion back side of rotary vortex rotary part applies regulation, avoid rotary vortex rotary part to leave fixed scroll member and overturning-free.

Above-mentioned scroll compressor in the past as shown in figure 17, will be by fixing 2a of scroll portion (calling the 2a of scroll portion in the following text) and the fixing fixed scroll member 2 that constitutes of runner plate 2b (calling runner plate 2b in the following text) and mesh by the rotary vortex rotary part 4 that rotation scroll 4a of portion (calling the 4a of scroll portion in the following text) and rotation runner plate 4b (calling runner plate 4b in the following text) constitute, between both sides, form pressing chamber 5, make rotary vortex rotary part 4 when the basic upper edge circular orbit that carries out the rotation restriction by rotation limting mechanism 22 rotates, pressing chamber 5 one sides change volume and simultaneously move, in view of the above, carry out the suction of refrigeration agent, compression and discharge.

That is, refrigeration agent is sucked by suction pipe 1, through the suction space 3 of fixed scroll member 2, is enclosed in formed pressing chamber 5 between fixed scroll member 2 and the rotary vortex rotary part 4, and towards the center, one side reduces volume and simultaneously is compressed, and is discharged from by exhaust port 6.

At this moment, produce the heat of compression because be formed in the pressing chamber 5 between fixed scroll member 2 and the rotary vortex rotary part 4 owing to carrying out compression, so become high temperature owing to this heat makes each scroll element 2,4.Like this, because the pressure in each pressing chamber 5 raises to pressing chamber 5 pressure of central side gradually from the pressing chamber 5 of most peripheral side, so on each 2a of scroll portion, 4a, produce from the temperature gradient of most peripheral side towards central side.That is, the pressing chamber 5 of central side (interior all sides) is than the pressing chamber 5 temperature height of most peripheral side.Because this temperature rises, each 2a of scroll portion, 4a thermal expansion particularly are positioned at the distolateral thermal expansion greatly of week of each 2a of scroll portion, 4a of the center side that becomes high temperature.Therefore, when each 2a of scroll portion, 4a thermal expansion, the gap size when the thrust direction gap ratio at the bottom of the crown of each 2a of scroll portion, 4a and the tooth of each

runner plate

2b, 4b is assembled is little, and the crown of each 2a of scroll portion, 4a contacts with at the bottom of the tooth of each runner plate 2b, 4b.Have again,, might damage each

runner plate

2b, 4b and each 2a of scroll portion, 4a if surface of contact voltage rise height then produces adhesion mutually.

Therefore, for example in the scroll compressor of in patent documentation 1, putting down in writing, the scroll portion of its rotary vortex rotary part or fixed scroll member constitutes, adjustment from the bottom of the tooth of runner plate to the height dimension of crown, under assembled state, be formed on interior all sides between at the bottom of the crown of each scroll portion and the other side's the tooth and be maximum thrust direction gap.

In addition, in the rotary compressor that patent documentation 2 is put down in writing, result based on the temperature distribution of the tooth face of the scroll portion that measures, with the crown of the scroll portion of at least one side in rotary vortex rotary part or the fixed scroll member or form make and the other side's tooth at the bottom of between the thrust direction gap in interior all sides for maximum, or form and make this thrust direction gap in a plurality of phase change.

In addition, in the scroll compressor of in patent documentation 3, putting down in writing, too as shown in figure 17, the refrigerant gas that sucks from suction pipe 1 passes through the suction space 3 of the fixed scroll member 2 that is made of 2a of scroll portion and runner plate 2b, enclosed can with the pressing chamber 5 of rotary vortex rotary part 4 engagements that constitute by 4a of scroll portion and runner plate 4b in, towards the center of fixed scroll member 2, one side reduces volume, one side is compressed, and is discharged from by exhaust port 6.

Be rotated scroll element 4 and be installed in that slip spacer ring 17 on the annular slot of bearing part 7 surrounds and the back pressure chamber 8 that forms, be set to middle pressure the between head pressure and the suction pressure, control by back pressure regulating mechanism 9, make this centre press to certain pressure.In addition, 17 slips of slip spacer ring are at the inner face 4d of rotary vortex rotary part 4.

Back pressure regulating mechanism 9 from the inside of back pressure chamber 8 by fixed scroll member 2 with suck the access 10 that space 3 is communicated with valve 11 be set, if the pressure ratio setting pressure height of back pressure chamber 8, then valve 11 is opened, the machine oil of back pressure chamber 8 is supplied with to sucking space 3, made and maintain certain middle pressure in the back pressure chamber 8.In addition, to suck the machine oil supplied with in space 3 along with rotatablely move one in the same way pressing chamber 5 move, play the effect of leaking between the pressing chamber 5 of preventing.Apply above-mentioned middle power at the back side of rotary vortex rotary part 4, suppress on-stream generation overturning.If overturning, then fixed scroll member 2 is separated with rotary vortex rotary part 4, produces in this part and leaks.

Constitute the fixed scroll member 2 of scroll compressor and the material of rotary vortex rotary part 4, both all use the iron class based on cast iron, and perhaps fixed scroll member 2 is used the iron class, and rotary vortex rotary part 4 uses the aluminium class.

(patent documentation 1)

The spy opens clear 58-67902 communique

(patent documentation 2)

Te Kaiping 07-197891 communique

(patent documentation 3)

The spy opens the 2001-280252 communique

But, in formation as described above, do not consider the fixed scroll member that causes because of pressure and the distortion of rotary vortex rotary part, under the situation or situation of high loaded process as refrigeration agent use carbon dioxide, contact pressure at the bottom of the crown of fixed scroll member and the tooth of rotary vortex rotary part is unequal, there is the possibility that produces adhesion and inordinate wear, has the compression efficiency as compressor, the problem that durability reduces.

Therefore, the present invention is exactly in view of above-mentioned problem in the past, is purpose so that a kind of scroll compressor to be provided, and this scroll compressor is simple and seeks low-cost configuration, has high efficiency and high reliability simultaneously.

In addition, under the situation that carbon dioxide is used as refrigeration agent, the head pressure of compressor with freon is compared as the compressor in the past of refrigeration agent, on high-tension side pressure greatly about 7-10 doubly more than.Therefore, if pay the back pressure that rotary vortex rotary part only can not leave fixed scroll member, then rotary vortex rotary part is pressed against on the fixed scroll member powerfully, produces the inordinate wear or the sintering of slide part, causes performance to reduce because of input increases.

In addition, in the system that becomes the many refrigeration agents of big capacity, when the violent transition operation of returning of liquid refrigerant, because the liquid refrigerant of the carbon dioxide that cleaning is high, exist on the thrust face of rotary vortex rotary part and to produce that lubricant oil interrupts or temperature rises, be starting point, cause the possibility of sintering with the aluminium surface.

In addition, using identical metal, the iron type materials of thermal expansion coefficient, form under the situation of two scroll elements, because the proportion of rotary vortex rotary part increases, so the centrifugal force during running increases, its result is, the bearing part load increases, and slippage loss also increases.Particularly when running up because centrifugal force is very big, so on main shaft and bearing part sharp wear.In addition,, need carry out machining critically, but,, be difficult to improve producibility so its processing is extremely difficult because the machinability of iron type materials is low to attachment face and slip surface in order to improve the precision of scroll portion.

In addition, each pressing chamber produces the heat of compression owing to carrying out compression, because should heat, each scroll element becomes high temperature.Like this, the pressure in each pressing chamber raises to the pressure chamber of central side successively from the pressing chamber of most peripheral side, produces temperature gradient in each scroll portion from most peripheral side direction central side.That is, the pressing chamber of central side (interior all sides) is than the pressing chamber temperature height of most peripheral side.Because of this temperature rises, each scroll portion thermal expansion particularly is positioned at all sides thermal expansion greatly of each scroll portion of the center side that becomes high temperature.Therefore, when the thermal expansion of each scroll portion, the gap size of the gap of the thrust direction at the bottom of the tooth face of each scroll portion and the tooth of each runner plate during than assembling is little, and the tooth face of each scroll portion contacts with at the bottom of the tooth of each runner plate.If surface of contact is pressed further and is raise, then exist to produce adhesion mutually, the possibility that each runner plate and each scroll portion sustain damage exists the compression efficiency as compressor, the problem that durability reduces.Particularly on fixed scroll member, use iron type materials, on rotary vortex rotary part, use aluminium class material, use the metal of different thermal expansion coefficient and under the situation about forming, this problem will display significantly.

In addition, the performance that produces for fear of the existence because of the thrust direction gap reduces, and be provided with on any one party of rotary vortex rotary part and fixed scroll member or two sides under the situation of end envelope, exist because of the end sealing-in and touch the increase that produces slippage loss and the spare part number increases and because the increase of process engineering makes the problem of producibility reduction.

Therefore, other purposes of the present invention provide a kind of scroll compressor, and this scroll compressor has high efficiency and high reliability under the situation that carbon dioxide is used as refrigeration agent.

Have again, in patent documentation 2 described scroll compressors, considered each pressing chamber that between fixed scroll member and rotary vortex rotary part, forms, be to make each scroll portion thermal expansion, and do not consider head pressure and the fixed scroll member that pressure difference caused of suction pressure and the distortion of rotary vortex rotary part because of compressor by carrying out the heat of compression that compression produces.The housing section of the capacity eccentric bearing in rotary vortex rotary part particularly, the thickness of the runner plate of rotary vortex rotary part is little, because the pressure reduction of head pressure and suction pressure, distortion to the fixed scroll member side becomes big, at the bottom of the tooth of rotation vortex and the crown of fixed scroll because not comprehensive engagement, increase, produce adhesion mutually and surface of contact is pressed, have the compression efficiency as compressor, the problem that durability reduces.

Therefore, other purposes of the present invention provide a kind of scroll compressor, and this scroll compressor is considered the pressure distortion of the housing section of the capacity eccentric bearing in the rotation vortex, has realized high reliability and the high efficiency that begins from start of run.

Summary of the invention

Scroll compressor based on first mode of execution of the present invention, the fixedly scroll portion of scroll and the rotation scroll portion of scroll are meshed and the formation pressing chamber, the fixedly scroll portion of described scroll erects from the fixedly runner plate of fixed scroll member, and the rotation scroll portion of described scroll erects from the rotation runner plate of rotary vortex rotary part; Make rotary vortex rotary part carry out the basic upper edge circular orbit rotation of rotation restriction by the rotation limting mechanism, the volume that one side continuously changes pressing chamber simultaneously sucks, compression, discharging refrigerant, second gap of the thrust direction between the crown of at the bottom of the tooth of fixing runner plate and at the bottom of the tooth of first gap of the thrust direction between the crown of rotation scroll portion and rotation runner plate and fixing scroll portion is formed the shape that increases gradually from the inside all sides of outer circumferential side, first gap is formed greater than second gap.

According to present embodiment, because first gap and second gap increase gradually from the inside all sides of outer circumferential side, so can guarantee to be out of shape the surface of contact pressure of each the scroll portion that causes than the lowland because of thermal expansion, even simultaneously because head pressure, fixed scroll member is deformed into convex form downwards, also because first gap bigger than second gap absorbs the amount of this pressure distortion, so can be maintained fixed contact pressure at the bottom of the tooth of the crown of scroll element and rotary vortex rotary part equably.Therefore, can not produce adhesion or inordinate wear, the scroll compressor of having guaranteed high reliability can be provided.

Second mode of execution of the present invention is in the scroll compressor based on first mode of execution, and the height that changes rotation scroll portion forms first gap, and the thickness that changes the rotation runner plate forms second gap.

According to present embodiment, make first gap and second gap become the shape that increases gradually from the inside all sides of outer circumferential side, and make first gap bigger than second gap, just make simple low cost become possibility.In view of the above, eliminated adhesion that causes because of thermal distortion or pressure distortion etc., the scroll compressor with high reliability can be provided.

The 3rd mode of execution of the present invention is in the scroll compressor based on first mode of execution, and the height that changes rotation scroll portion forms first gap, and changing fixedly, the height of scroll portion forms second gap.

The 4th mode of execution of the present invention is in the scroll compressor based on first mode of execution, and the change fixedly thickness of runner plate forms first gap, and the thickness that changes the rotation runner plate forms second gap.

The 5th mode of execution of the present invention is in the scroll compressor based on first mode of execution, and the change fixedly thickness of runner plate forms first gap, and changing fixedly, the height of scroll portion forms second gap.

The 6th mode of execution of the present invention is in the scroll compressor based on first to the 5th mode of execution, uses carbon dioxide as refrigeration agent, and the thickness that makes the rotation runner plate is less than 3.0 times of the height of rotation scroll portion.

According to present embodiment, press and suck the pressure reduction of pressing with respect to the discharge under the situation of using carbon dioxide coolant, the rotary vortex rotary part that the thickness by making runner plate and the height of scroll portion become appropriate relation flexibly is out of shape, guaranteed the contact pressure at the bottom of the tooth of the crown of fixed scroll member and rotary vortex rotary part more equably, thereby can not produce adhesion or inordinate wear, the scroll compressor of having guaranteed high reliability can be provided.

The 7th mode of execution of the present invention is in the scroll compressor based on first to the 5th mode of execution, uses HFC class or HCFC class refrigeration agent as refrigeration agent, and the thickness that makes the rotation runner plate is less than 1.0 times of the height of rotation scroll portion.

According to present embodiment, press and suck the pressure reduction of pressing with respect to the discharge under the situation of using HFC class or HCFC class refrigeration agent, the rotary vortex rotary part that the thickness by making runner plate and the height of scroll portion become appropriate relation flexibly is out of shape, guaranteed the contact pressure at the bottom of the tooth of the crown of fixed scroll member and rotary vortex rotary part more equably, thereby can not produce adhesion or inordinate wear, the scroll compressor of having guaranteed high reliability can be provided.

The 8th mode of execution of the present invention is in the scroll compressor based on first to the 5th mode of execution, uses HC class refrigeration agent as refrigeration agent, and the thickness that makes the rotation runner plate is less than 0.6 times of the height of rotation scroll portion.

According to present embodiment, press and suck the pressure reduction of pressing with respect to the discharge under the situation of using HC class refrigeration agent, the rotary vortex rotary part that the thickness by making runner plate and the height of scroll portion become appropriate relation flexibly is out of shape, guaranteed the contact pressure at the bottom of the tooth of the crown of fixed scroll member and rotary vortex rotary part more equably, thereby can not produce adhesion or inordinate wear, the scroll compressor of having guaranteed high reliability can be provided.

Scroll compressor based on the 9th mode of execution of the present invention, the fixedly scroll portion of scroll and the rotation scroll portion of scroll are meshed and the formation pressing chamber, the fixedly scroll portion of described scroll erects from the fixedly runner plate of fixed scroll member, and the rotation scroll portion of described scroll erects from the rotation runner plate of rotary vortex rotary part; Make rotary vortex rotary part carry out the basic upper edge circular orbit rotation of rotation restriction by the rotation limting mechanism, the volume that one side continuously changes pressing chamber simultaneously sucks, compression, discharging refrigerant, use carbon dioxide as refrigeration agent, form fixed scroll member with the ferrous metal material, form rotary vortex rotary part with the aluminium metalloid material, rotary vortex rotary part is carried out surface treatment, for at the bottom of the tooth that makes fixing runner plate and first gap of the thrust direction between the crown of rotation scroll portion increases from the inside all sides of outer circumferential side, the crown of rotation scroll portion is tilted.

According to present embodiment, because fixed scroll member forms with iron type materials, rotary vortex rotary part forms with aluminium class material, rotary vortex rotary part is implemented surface treatment, so in the High Pressure Difference running of using carbon dioxide as refrigeration agent, even pressed against at the bottom of the tooth of rotation runner plate on the crown of fixing scroll portion powerfully, can not produce sintering ground and turn round by having the surface treatment inhibition inordinate wear of hardened layer yet.In addition, according to present embodiment, even in the system that becomes the many refrigeration agents of big capacity, liquid refrigerant return the running of violent transient state the time, also can not can produce because of the high carbon dioxide liquid cryogen of cleaning lubricant oil that cause, on the thrust face of rotary vortex rotary part and cut off or turn round because of the occurrence temperature sintering that causes that rises.In addition, according to present embodiment, because rotary vortex rotary part forms with aluminium class material, thus the centrifugal force of the drive portion can reduce to run up the time, and can excellent in te pins of durability, can reduce slippage loss.In addition, according to present embodiment, for at the bottom of the tooth that makes fixing runner plate and first gap of the thrust direction between the crown of rotation scroll portion increases from the inside all sides of outer circumferential side, tilt by the crown that makes rotation scroll portion, even for the heat of compression of the high temperature that in compression process, produces, also can prevent contact at the crown of the central part of the scroll portion of rotary vortex rotary part at central part.

The tenth mode of execution of the present invention is in the scroll compressor based on the 9th mode of execution, and the minimum constructive height that makes the rotation scroll portion of interior all sides is more than or equal to 99.6% of the maximum height of the rotation scroll portion of outer circumferential side, but less than 100%.

According to present embodiment, can simultaneously reduce from the leakage loss of the tooth face of each scroll portion, one side prevents the adhesion etc. of the tooth face of each scroll portion, and the leak suppressing that will begin from crown is in inferior limit, can make the performance that improves compressor and guarantees reliability and deposit.

Scroll compressor based on the 11 mode of execution of the present invention, the fixedly scroll portion of scroll and the rotation scroll portion of scroll are meshed and the formation pressing chamber, the fixedly scroll portion of described scroll erects from the fixedly runner plate of fixed scroll member, and the rotation scroll portion of described scroll erects from the rotation runner plate of rotary vortex rotary part; Make rotary vortex rotary part carry out the basic upper edge circular orbit rotation of rotation restriction by the rotation limting mechanism, the volume that one side continuously changes pressing chamber simultaneously sucks, compression, discharging refrigerant, use carbon dioxide as refrigeration agent, form fixed scroll member with the ferrous metal material, form rotary vortex rotary part with the aluminium metalloid material, carry out surface treatment beyond the crown to rotation scroll portion.

According to present embodiment,, also can prevent contact at the crown of the central part of the scroll portion of rotary vortex rotary part even for the heat of compression of the high temperature that in compression process, produces at central part.Even also have hypothesis under the situation of the crown contact of the central part of scroll portion, because crown is not carried out surface treatment yet, on-stream can not take place that the crown of fixed scroll member is adjusted on sintering ground and fixedly at the bottom of the tooth of runner plate between the gap of thrust direction, so do not need processing, just can make compressor performance raising and reliability and deposit, so can seek cost degradation.

The 12 mode of execution of the present invention is in the scroll compressor based on the 9th to the 11 mode of execution, for at the bottom of the tooth that makes the rotation runner plate and fixing second gap of the thrust direction between the crown of scroll portion increases from the inside all sides of outer circumferential side, and make the tooth slanted floor of rotation runner plate.

According to present embodiment, under the High Pressure Difference running of using carbon dioxide as refrigeration agent, fixed scroll member prevents that by pressure-strain or temperature strain the crown of the scrollwork scroll of fixed scroll member from touching at the bottom of the tooth of rotation runner plate, can seek high reliability.

The 13 mode of execution of the present invention is in the scroll compressor based on the 9th to the 11 mode of execution, as surface treatment, carries out that pellumina is handled, PVD handles and nickel plating phosphorus any one in handling.

According to present embodiment, even under the High Pressure Difference of carbon dioxide coolant, use the still remaining surface treatment overlay film that has because of the wearing and tearing of the overlay film with hardened layer that slide to produce are long-time less even have, can sintering, can seek high reliability.

The 14 mode of execution of the present invention is in the scroll compressor based on the 9th to the 11 mode of execution, to carrying out the surface-treated part, carries out grinding disposing, polishing treatment or barreling and handles.

According to present embodiment, by reducing the roughness that surface treatment causes, can seek to utilize and reduce the performance that slippage loss brings and improve, particularly can seek the high efficiency when turning round since the initial stage.

Scroll compressor based on the 15 mode of execution of the present invention, make the fixed scroll member and the rotary vortex rotary part engagement that erect the scroll portion of scroll from runner plate, between both sides, form pressing chamber, make rotary vortex rotary part when the basic upper edge circular orbit that carries out the rotation restriction by the rotation limting mechanism rotates, pressing chamber simultaneously changes volume and simultaneously moves, in view of the above, suck, compression, discharge, for at the bottom of the tooth that makes rotary vortex rotary part and second gap of the thrust direction between the crown of fixed scroll member increases from the inside all sides of outer circumferential side, and inclination is set, and, in order to make this second gap impartial and for maximum, and form at the bottom of the tooth of rotation vortex and the crown of fixed scroll in the scope of the housing section of the capacity eccentric bearing that is equivalent to rotary vortex rotary part at least.

According to present embodiment, even housing section at the little capacity eccentric bearing of the thickness of the runner plate that rotates vortex, under the situation of the pressure distortion that the pressure reduction of generation head pressure and suction pressure causes, also because at the bottom of the tooth of rotation vortex and the crown of fixed scroll be not comprehensive engagement, but contact equably, so can realize high reliability and the high efficiency when turning round since the initial stage.

The 16 mode of execution of the present invention is in the scroll compressor based on the 15 mode of execution, for second gap is increased from the inside all sides of outer circumferential side, form the plane of inclination that becomes depression with respect to fixed scroll at the bottom of the tooth of rotation vortex from the inside all sides of outer circumferential side, and, at the bottom of the tooth of the rotation vortex of the housing section of the capacity eccentric bearing that is equivalent to rotary vortex rotary part at least, be set to the par of maximum recess.

According to present embodiment, even housing section at the little capacity eccentric bearing of the thickness of the runner plate that rotates vortex, under the situation of the pressure distortion that the pressure reduction of generation head pressure and suction pressure causes, also because have the shape of the tooth bottom pressure distortion of having considered the rotation vortex, so at the bottom of the tooth of rotation vortex and the crown of fixed scroll be not comprehensive engagement, but contact equably just can realize high reliability and the high efficiency when turning round since the initial stage.

The 17 mode of execution of the present invention is in the scroll compressor based on the 15 mode of execution, crown in fixed scroll member, from the mode that the inside all sides of outer circumferential side reduce the plane of inclination is set with the scroll height, and, the height that the scroll portion of fixed scroll is set is the par of minimum constructive height size, and is relative at the bottom of the tooth of the scroll portion of this fixed scroll and the rotation vortex of the housing section of the capacity eccentric bearing that is equivalent to rotary vortex rotary part at least.

According to present embodiment, even housing section at the little capacity eccentric bearing of the thickness of the runner plate that rotates vortex, under the situation of the pressure distortion that the pressure reduction of generation head pressure and suction pressure causes, also because have the shape of the crown pressure distortion of having considered fixed scroll, so at the bottom of the tooth of rotation vortex and the crown of fixed scroll be not comprehensive engagement, but contact equably just can realize high reliability and the high efficiency when turning round since the initial stage.

The 18 mode of execution of the present invention is in the scroll compressor based on the 15 to the 17 mode of execution, for first gap of the thrust direction between at the bottom of the tooth of the crown that makes rotary vortex rotary part and fixed scroll member increases from the inside all sides of outer circumferential side, on the crown of rotary vortex rotary part, inclination is set.

According to present embodiment, because in compression process, become high temperature, so can prevent the situation that the crown of central part increases and contacts owing to thermal expansion owing to producing the heat of compression at central part.

The 19 mode of execution of the present invention is in the scroll compressor based on the 15 to the 17 mode of execution, for first gap of the thrust direction between at the bottom of the tooth of the crown that makes rotary vortex rotary part and fixed scroll member increases from the inside all sides of outer circumferential side, at the bottom of the tooth of fixed scroll member, inclination is set.

The 20 mode of execution of the present invention is in the scroll compressor based on the 15 to the 18 mode of execution, to rotary vortex rotary part, as surface treatment, carries out that pellumina is handled, PVD handles and nickel plating phosphorus any one in handling.

According to present embodiment, can suppress inordinate wear by surface treatment with hardened layer, can not turn round on sintering ground.In addition, even the liquid refrigerant in the system that becomes the many refrigeration agents of big capacity return the running of violent transient state the time, even lubricant oil cuts off or temperature rises because liquid refrigerant produces on the thrust face of rotation vortex, can sintering yet, can guarantee high reliability.

The 21 mode of execution of the present invention is in the scroll compressor based on the 15 to the 19 mode of execution, and refrigeration agent is a high-pressure refrigerant, for example carbon dioxide.

According to present embodiment, refrigeration agent is a carbon dioxide, even the tooth bottom pressure distortion of rotation vortex also can prevent adhesion and inordinate wear effectively.

Description of drawings

Fig. 1 is the longitudinal section of expression based on the scroll compressor of the first embodiment of the present invention.

Fig. 2 is the amplification view of the compression mechanical part of scroll compressor shown in Figure 1.

Fig. 3 is the general profile chart of the compression mechanical part of scroll compressor shown in Figure 1.

Fig. 4 is the longitudinal section of expression based on the scroll compressor of the third embodiment of the present invention.

Fig. 5 is the major component sectional view of the compression mechanical part of scroll compressor shown in Figure 4.

Fig. 6 is the plan view of the rotary vortex rotary part of scroll compressor shown in Figure 4.

Fig. 7 is the side view cutaway drawing of the rotary vortex rotary part of scroll compressor shown in Figure 4.

Fig. 8 is the chart of height ratio that is illustrated in the rotation scroll portion of the rotary vortex rotary part in the scroll compressor shown in Figure 4.

Fig. 9 is the major component sectional view of expression based on the scroll compressor of the fourth embodiment of the present invention.

Figure 10 is the major component sectional view of expression based on the scroll compressor of the fifth embodiment of the present invention.

Figure 11 is the major component sectional view of expression based on the scroll compressor of the sixth embodiment of the present invention.

Figure 12 is the plan view of the rotary vortex rotary part of scroll compressor shown in Figure 11.

Figure 13 is the chart of the tooth Bottom Shape of the rotary vortex rotary part after the high loaded process that is illustrated in the scroll compressor shown in Figure 11.

Figure 14 is the major component sectional view of expression based on the scroll compressor of the seventh embodiment of the present invention.

Figure 15 is the major component sectional view of expression based on the scroll compressor of the eighth embodiment of the present invention.

Figure 16 is the major component sectional view of expression based on the scroll compressor of the ninth embodiment of the present invention.

Figure 17 is a longitudinal section of representing scroll compressor in the past.

Embodiment

Below, with reference to accompanying drawing, the scroll compressor based on one embodiment of the present of invention is described.

(embodiment 1)

Fig. 1 is the longitudinal section of expression based on the scroll compressor of the first embodiment of the present invention.In addition, in the figure in first embodiment's shown in the scroll compressor, for the identical formation of scroll compressor function in the past shown in Figure 17, mark identical symbol.

The scroll compressor of present embodiment has compression mechanical part and mechanism portion in seal container 20.Compression mechanical part is configured in the top in the seal container 20, and mechanism portion is configured in the below of compression mechanical part.Suction pipe 1 and discharge tube 21 are set on the top of seal container 20.Bottom in seal container 20 has the oil vessel 29 that retains lubricant oil.

Compression mechanical part is made of fixed scroll member 2 and rotary vortex rotary part 4, and the engagement of two parts forms a plurality of pressing chambers 5.Promptly, fixed scroll member 2 is that the fixedly scroll 2a of portion of scroll (calling the 2a of scroll portion in the following text) is erected and constitutes from fixing runner plate 2b (calling runner plate 2b in the following text), and rotary vortex rotary part 4 is that the rotation scroll 4a of portion of scroll (calling the 4a of scroll portion in the following text) is erected and constitutes from rotation runner plate 4b (calling runner plate 4b in the following text).Pressing chamber 5 is to be meshed and formed by 2a of scroll portion and the 4a of scroll portion between runner plate 2b and runner plate 4b.

Rotary vortex rotary part 4 is limited its rotation by rotation limting mechanism 22, rotates along circular orbit.Pressing chamber 5 is by the spinning movement of this rotary vortex rotary part 4, and one side changes volume and simultaneously moves.In addition, constitute the back pressure that applies regulation by the back side, make rotary vortex rotary part 4 can not leave fixed scroll member 2 and overturning the peripheral part of rotary vortex rotary part 4 and scroll portion.

In addition, mechanism portion is made of with the rotor 26 that can be supported on the inboard of stator 25 stator 25 of the inboard that is fixed on seal container 20 with rotating freely.And axle 13 is inlaid on the rotor 26, and this 13 is by bearing part 7 and remains on the structure that the ball bearing 28 on the auxiliary bearing parts 27 supports.

Like this, the refrigeration agent that sucks by suction pipe 1 is through the suction space 3 of fixed scroll member 2, enclosed in the pressing chamber 5 that forms by fixed scroll member 2 and rotary vortex rotary part 4 engagements, center towards fixed scroll member 2, one side reduces volume, one side is compressed, and is discharged in the upper space 32 in the compression container 20 by exhaust port 6.In addition, the inside of the baffler 14 of covering exhaust port 6 is parts of upper space 32.

In addition, the back pressure chamber 8 that is formed with bearing part 7 encirclements by fixed scroll member 2 must always have the back pressure that rotary vortex rotary part 4 is not separated with fixed scroll member 2.Back pressure regulating mechanism 9 is that the back pressure with rotary vortex rotary part 4 always remains on certain mechanism, constitutes on the inside of back pressure chamber 8 by fixed scroll member 2 and access 10 that suction space 3 is communicated with, and valve 11 is set.

If the pressure ratio setting pressure height of back pressure chamber 8, then valve 11 is opened, and the lubricant oil of back pressure chamber 8 is supplied with to sucking space 3, will maintain certain middle pressure in the back pressure chamber.Be applied in above-mentioned middle the pressure at the back side of rotary vortex rotary part 4, suppress on-stream overturning.Supply to the lubricant oil that sucks space 3 along with the rotatablely moving of rotary vortex rotary part 4, move, play the effect of the leakage of refrigerant that prevents 5 of pressing chambers to pressing chamber 5.

In addition, remain in lubricant oil in the oil vessel 29, be imported into the upper end portion of axle 13 by oil pump 31 by being formed at the path 23 of axle 13 inside.Be directed to oil lubrication axle 13 and the slip surface 33 between the rotation vortex 4 and the slip surface 34 between axle 13 and the bearing part 7 of the upper end portion of axle 13.In addition, the access 24 of the inside of the part of lubricant oil by being arranged on rotary vortex rotary part 4 after by restriction 12 decompressions that are installed on this access 24, supplies to back pressure chamber 8.Press when the pressure of back pressure chamber 8 is higher than to set, when valve 11 was opened, the lubricant oil that is deposited in back pressure chamber 8 was waved effect as the lubricated and sealing machine fry dried food ingredients of engagement slip surface by to sucking space 3 or pressing chamber 5 is supplied with.

Have again,, the formation and the action thereof of the scroll compressor of relevant present embodiment are described with reference to the amplification view of compression mechanical part shown in Figure 2 and general profile chart shown in Figure 3.

In compression mechanical part shown in Figure 2, at the bottom of the tooth of the runner plate 2a of fixed scroll member 2 and first gap 15 of the thrust direction between the crown of the 4a of scroll portion of rotary vortex rotary part 4 is in order to increase gradually from the inside all sides of outer circumferential side, be change rotary vortex rotary part 4 the 4a of scroll portion height and form.In addition, at the bottom of the tooth of the runner plate 4b of rotary vortex rotary part 4 and second gap 16 of the thrust direction between the crown of the 2a of scroll portion of fixed scroll member 2 is in order to increase gradually from the inside all sides of outer circumferential side, be change rotary vortex rotary part 4 runner plate 4b thickness and form.

For example, in the general profile chart of compression mechanical part shown in Figure 3, the height (is the height dimension H of the 4a of scroll portion of benchmark with tooth bottom surface 4c shown in Figure 3) that makes the 4a of scroll portion of rotary vortex rotary part 4 is from H1, order according to H2, H3, H4, reduce variation from the inside all offset sections of outer circumferential side ground, form first gap 15.In addition, the thickness (is the thickness size t of the runner plate 4b of benchmark with inner face 4d shown in Figure 3) that makes the runner plate 4b of rotary vortex rotary part 4 is from t1, according to the order of t2, t3, by making tooth bottom surface 4c depression, reduce variation from the inside all offset sections of outer circumferential side ground, form second gap 16.

Like this, first gap 15 forms greatlyyer than second gap 16.In addition, in fixed scroll member shown in Figure 32, the height dimension H0 of the 2a of scroll portion and the thickness size t0 of runner plate 2b constitute necessarily.

When the running of the scroll compressor of above-mentioned formation, the pressure of pressing chamber 5 rises to head pressure from suction pressure, at the upper space 32 that is arranged in across the opposition side of the pressing chamber 5 of the runner plate 2a of fixed scroll member 2, has the refrigerant gas of head pressure.Therefore, because utilize thrust face to keep periphery, so pass through the pressure difference of compression volume side and upper space 32 sides, fixed scroll member 2 is crooked to the direction of compression volume with convex form.In addition, because because compression produces the heat of compression in the pressing chamber 5 that is formed between fixed scroll member 2 and the rotary vortex rotary part 4, so because this heat, each 2a of scroll portion, 4a become high temperature.Like this, the pressure in each pressing chamber 5 raises to pressing chamber 5 pressure of central side successively because of the pressing chamber 5 from the most peripheral side, so produce the temperature gradient towards central part on each 2a of scroll portion, 4a.That is, the pressing chamber 5 of central side (interior all sides) is than the pressing chamber 5 temperature height of most peripheral side.Because this temperature rises, each 2a of scroll portion, 4a thermal expansion particularly are positioned at each 2a of scroll portion, the 4a thermal expansion greatly of the central side that becomes high temperature.

Scroll compressor according to present embodiment, because form first gap 15 significantly with respect to second gap 16, so even fixed scroll member 2 is subjected to above-mentioned pressure distortion, compared with at the bottom of the tooth of runner plate 2b with the contacting of the crown of the 4a of scroll portion, contact earlier with the crown of the 2a of scroll portion and the thrust face of periphery at the bottom of the tooth of runner plate 4b.

Promptly, because for the excessive thrust that under the situation of high loaded process etc., produces, first gaps 15 bigger than second gap 16 absorb the amount of the distortion that produces because of this thrust, so the contact pressure at the bottom of the tooth of the runner plate 4b of the crown of the 2a of scroll portion of fixed scroll member 2 and rotary vortex rotary part 4 can be remained equalization.Therefore, can not produce adhesion and inordinate wear.In addition, because first gap 15 forms significantly with respect to second gap 16, so, also can keep the surface of contact of the crown of each 2a of scroll portion, 4a to press than the lowland even be subjected to the influence of thermal expansion.Therefore, can not produce adhesion and inordinate wear, the scroll compressor of having guaranteed high reliability can be provided.

In addition, above-mentioned first embodiment's formation is the height that changes the scroll 4a of portion, form the shape in first gap 15, change the thickness of runner plate 4b simultaneously, form the shape in second gap 16, like this, just make the minimizing degree of height dimension of the 4a of scroll portion bigger, but also can be following each such structure than the minimizing degree of the thickness size of runner plate 4b.

For example, also can be for first gap 15 is increased gradually from the inside all sides of outer circumferential side, and change rotary vortex rotary part 4 the 4a of scroll portion height and form, simultaneously, for second gap 16 is increased gradually from the inside all sides of outer circumferential side, and change fixed scroll member 2 the 2a of scroll portion height and form.In addition, under the situation of this formation, the thickness size of the thickness size of runner plate 2b and runner plate 4b constitutes necessarily.

In addition, also can be for first gap 15 is increased gradually from the inside all sides of outer circumferential side, and change fixed scroll member 2 runner plate 2b thickness and form, simultaneously, for second gap 16 is increased gradually from the inside all sides of outer circumferential side, and change rotary vortex rotary part 2 runner plate 2b thickness and form.In addition, under the situation of this formation, the height dimension of the height dimension of the 2a of scroll portion and the 4a of scroll portion constitutes necessarily.

Have again, also can be for first gap 15 is increased gradually from the inside all sides of outer circumferential side, and change fixed scroll member 2 runner plate 2b thickness and form, simultaneously, for second gap 16 is increased gradually from the inside all sides of outer circumferential side, and change fixed scroll member 2 the 2a of scroll portion height and form.In addition, under the situation of this formation, the height dimension of the 4a of scroll portion and the thickness size of runner plate 4b constitute necessarily.

(embodiment 2)

Then, just describe based on the scroll compressor of the second embodiment of the present invention.This second embodiment's scroll compressor is compared with first embodiment's formation, its difference is, in order to use carbon dioxide as refrigeration agent, the scroll portion height of setting rotary vortex rotary part is different with the formation of runner plate thickness, because other formation is identical with first embodiment, so use first embodiment's accompanying drawing to describe.

Promptly, using as refrigeration agent under the situation of carbon dioxide, the running pressure of compressor is compared very high with the situation of using freon refrigerant in the past, even when steady running, head pressure also rises to the 10MPa degree, and suction pressure rises to the 4MPa degree.At this moment, pressing chamber 5 sides and back pressure chamber 8 sides at the runner plate 4b of rotary vortex rotary part 4 produce very big pressure reduction.

Here, in the thickness t of the runner plate 4b that makes rotary vortex rotary part shown in Figure 34 height H, surpass under 3.0 times of thick situations, with respect to making the crooked power (above-mentioned pressure reduction) of rotary vortex rotary part 4 with respect to the 4a of scroll portion, can guarantee sufficient rigidity, rotary vortex rotary part 4 can be out of shape.But, if indeformable fully, then contact unevenly at the bottom of the tooth of the crown of fixed scroll member 2 and rotary vortex rotary part 4, there is the situation that causes adhesion and inordinate wear.

Therefore, in the scroll compressor of present embodiment, the thickness t of the runner plate 4b of rotary vortex rotary part 4 is constituted height H with respect to the 4a of scroll portion, for more than or equal to 1.0 times, smaller or equal to 3.0 times thickness.In this case, by above-mentioned pressure difference, rotary vortex rotary part 4 flexibly is out of shape.

In other words, with respect to the pressure reduction that uses under the carbon dioxide coolant situation, rotary vortex rotary part 4 moderately is out of shape, by first gap 15 and second gap 16, be maintained fixed the contact pressure at the bottom of the tooth of the crown of scroll element 2 and rotary vortex rotary part 4 more equably, can not produce adhesion and inordinate wear, the scroll compressor of having guaranteed high reliability can be provided.

In addition, under the situation of the refrigeration agent that uses HFC class or HCFC class as refrigeration agent, be that thickness t with the runner plate 4b of rotary vortex rotary part 4 constitutes the height H with respect to the 4a of scroll portion, for more than or equal to 0.3 times, smaller or equal to 1.0 times thickness.In this case, with respect to and pressure difference that produce corresponding with the refrigeration agent of HFC class or HCFC class, rotary vortex rotary part 4 flexibly is out of shape.Therefore,, be maintained fixed the contact pressure at the bottom of the tooth of the crown of scroll element 2 and rotary vortex rotary part 4 more equably, can not produce adhesion and inordinate wear, the scroll compressor of having guaranteed high reliability can be provided by first gap 15 and second gap 16.

In addition, under the situation of the refrigeration agent that uses the HC class as refrigeration agent, be that thickness t with the runner plate 4b of rotary vortex rotary part 4 constitutes the height H with respect to the 4a of scroll portion, for more than or equal to 0.2 times, smaller or equal to 0.6 times thickness.In this case, also be with respect to the corresponding pressure difference of the refrigeration agent of HC class, rotary vortex rotary part 4 flexibly is out of shape, by first gap 15 and second gap 16, be maintained fixed the contact pressure at the bottom of the tooth of the crown of scroll element 2 and rotary vortex rotary part 4 more equably, can not produce adhesion and inordinate wear, the scroll compressor of having guaranteed high reliability can be provided.

In addition, in the above-described embodiments, material to fixed scroll member 2 and rotary vortex rotary part 4 has been omitted explanation, for example, use Fe class material as fixed scroll member 2, use Al class material as rotary vortex rotary part 4, under the situation that the different metal different by thermal expansion coefficient constitutes, can obtain more significant effect.

(embodiment 3)

Then, the scroll compressor based on the third embodiment of the present invention is described.Fig. 4 is the longitudinal section of expression based on the scroll compressor of the third embodiment of the present invention, Fig. 5 is the major component sectional view of the compression mechanical part of scroll compressor shown in Figure 4, Fig. 6 is the plan view of the rotary vortex rotary part of scroll compressor shown in Figure 4, Fig. 7 is the side view cutaway drawing of the rotary vortex rotary part of scroll compressor shown in Figure 4, and Fig. 8 is the chart of height ratio of rotation scroll portion of the rotary vortex rotary part of expression scroll compressor shown in Figure 4.In addition, for the identical formation of scroll compressor function in the past shown in Figure 17, mark identical symbol, also have too from following the 4th embodiment to the ten embodiments.

The scroll compressor of present embodiment is to have compression mechanical part and mechanism portion in seal container 20.Compression mechanical part is configured in the top in the seal container 20, and mechanism portion is configured in the below of compression mechanical part.Suction pipe 1 and discharge tube 21 are set on the top of seal container 20.Bottom in seal container 20 has the oil vessel 29 that retains lubricant oil.

Compression mechanical part is made of fixed scroll member 2 and rotary vortex rotary part 4, and the engagement of two parts forms a plurality of pressing chambers 5.That is, fixed scroll member 2 is that the 2a of scroll portion of scroll is erected and constitutes from runner plate 2b, and rotary vortex rotary part 4 is that the 4a of scroll portion of scroll is erected and constitutes from runner plate 4b.Pressing chamber 5 is between runner plate 2b and runner plate 4b, is meshed and is formed by 2a of scroll portion and the 4a of scroll portion.

Rotary vortex rotary part 4 is limited its rotation by rotation limting mechanism 22, rotates along circular orbit.Pressing chamber 5 is by the spinning movement of this rotary vortex rotary part 4, and one side changes volume and simultaneously moves.

On the inner face 4d of rotary vortex rotary part 4, back pressure chamber 8 is set.In this back pressure chamber 8, configuration slip spacer ring 17 is divided into two back pressure chamber 8 by this slip spacer ring 14 on the annular groove that is arranged on the bearing part 7.The head pressure of high pressure is acted on a side's of being cut apart by slip spacer ring 17 the medial region 8b.In addition, the intermediate pressure from suction pressure to the regulation between the head pressure is acted on the opposing party's the exterior lateral area 8a.Rotary vortex rotary part 4 is pressed on the fixed scroll 2 by the pressure applied thrust of these back pressure chambers 8 with being stabilized, reduces to leak, and stably carries out the circular orbit motion simultaneously.

The scroll compressor of present embodiment is to form fixed scroll member 2 by the ferrous metal material, forms rotary vortex rotary part 4 by the aluminium metalloid material, and rotary vortex rotary part 4 is carried out surface treatment, forms hardened layer.As surface treatment, carry out that pellumina is handled, PVD handles, nickel plating phosphorus any one in handling.

In addition, rotary vortex rotary part 4 carries out grinding disposing, polishing treatment or barreling and handles after surface treatment.Because grinding disposing, polishing treatment or barreling are handled, by reducing based on the surface-treated roughness, reduce surface friction drag, improve the reliability of the slip surface of rotary vortex rotary part 4, seek simultaneously to improve, particularly can seek the high efficiency when turning round since the initial stage by reducing the performance that slippage loss brings.

According to above-mentioned formation, using as refrigeration agent under the situation of carbon dioxide, the head pressure of compressor up to freon as about 7-10 of the high side pressure of the freeze cycle in the past of refrigeration agent doubly more than, only make rotary vortex rotary part 4 can not leave the back pressure of fixed scroll member 2 if pay, then rotary vortex rotary part 4 is pressed against on the fixed scroll member 2 powerfully, but by the hardened layer that produces by the surface treatment that is implemented on the rotary vortex rotary part 4, can not produce sintering, obtain the high scroll compressor of reliability.In addition, in the system that becomes the many refrigeration agents of big capacity, though when the transient state running of starting and defrosting etc., generation is returned to the liquid tempestuously of scroll compressor, because this liquid returns, lubricant oil is washed by liquid refrigerant, it is harsh that lubricating status becomes, but by the hardened layer that produces because of this surface treatment, can not cause sintering, making runs up becomes possibility.

In addition, under the normal temperature state,, and inclination is set at the crown of the 4a of scroll portion at the bottom of the tooth of the runner plate 2b that makes fixed scroll member 2 and first gap 15 of the thrust direction between the crown of the 4a of scroll portion of rotary vortex rotary part 4 increases from the inside all side B of outer circumferential side A.

Use Fig. 8, the inclination ratio of the crown of the 4a of this scroll portion is described.

Fig. 8 is the figure of crown height that is illustrated in the 4a of scroll portion of the rotary vortex rotary part 4 after the high loaded process.In addition, in Fig. 8, be use with the height of the 4a of scroll portion of outer circumferential side A as under 100 the situation, recently representing at the height of each locational scroll 4a of portion.

Rotary vortex rotary part 4 becomes high temperature owing to the heat of compression that produces along with becoming central part in compression process, because of thermal expansion is out of shape, simultaneously, because of High Pressure Difference is out of shape.Therefore, contact at the bottom of the tooth for crown and the runner plate 2b of fixed scroll 2 of the 4a of scroll portion that do not make rotation vortex 4, and all sides are the inclination of minimum constructive height in the crown of the 4a of scroll portion is provided with.In addition, if the minimum tooth cusp height that makes the 4a of scroll portion smaller or equal to 99.6% of maximum tooth cusp height, then from the leakage increase of crown, reduces performance.Therefore, in preferably making the minimum tooth cusp height of the 4a of scroll portion of all sides for more than or equal at 99.6% of the maximum tooth cusp height of the 4a of scroll portion of outer circumferential side, but less than 100%.

(embodiment 4)

Then, just describe based on the scroll compressor of the fourth embodiment of the present invention.Fig. 9 is the major component sectional view of expression based on the scroll compressor of the fourth embodiment of the present invention.In addition, in the scroll compressor of present embodiment, except that at the bottom of the tooth of the runner plate 4b of rotary vortex rotary part 4, owing to be identical formation with above-mentioned the 3rd embodiment, so omit its explanation.

In the present embodiment, for at the bottom of the tooth of the runner plate 4b that makes rotary vortex rotary part 4 and second gap 16 of the thrust direction between the crown of the 2a of scroll portion of fixed scroll member 2 increases from the inside all sides of outer circumferential side, and at the bottom of the tooth of the runner plate 4b of rotary vortex rotary part 4, inclination is set.According to this formation, under the High Pressure Difference running when using carbon dioxide as refrigeration agent, pressure-strain and temperature strain by fixed scroll member 2, contact partly at the bottom of the tooth of the crown that prevents the 2a of scroll portion and the runner plate 4b of rotation vortex 4, owing to being bears impartial face pressure to constitute, so can seek high reliability.

In addition, in the above-described embodiments, utilize each embodiment, illustrated in the situation that inclination is set on the crown of the 4a of scroll portion and the situation of inclination is set at the bottom of the tooth of runner plate 4b, but also can at the bottom of the tooth of the crown of the 4a of scroll portion and runner plate 4b, inclination be set all.

(embodiment 5)

Then, just describe based on the scroll compressor of the fifth embodiment of the present invention.Figure 10 is the major component sectional view of expression based on the scroll compressor of the fifth embodiment of the present invention.

In the scroll compressor of present embodiment, be at the bottom of the tooth of the crown of the 4a of scroll portion and runner plate 4b, inclination not to be set, constitute but carry out surface-treated beyond the crown to the 4a of scroll portion of rotation vortex 4.Except that this constitutes, because all the formation with embodiment 3 is identical, so omit its explanation.

According to present embodiment, even cause under the situation of thermal expansion or the caused pressure distortion of High Pressure Difference in the heat of compression that produces owing to the central part in compression process, because the crown of the 4a of scroll portion is not had the surface treatment of hardened layer, so can not produce sintering yet.Promptly, running by the stipulated time, so that the mode that the thrust direction gap between at the bottom of the tooth of the runner plate 2b of the crown of the 2a of scroll portion of fixed scroll member 2 and fixed scroll member 2 coincide, the 4a of scroll portion of rotary vortex rotary part 4 is owing to wearing and tearing are adjusted, so do not need in advance the crown of the 4a of scroll portion of rotary vortex rotary part 4 is made the processing of its inclination, owing to making the performance raising and the reliability of compressor and depositing, so can seek cost degradation.

In addition, substitute above-mentioned crown inclination is set, at the bottom of the tooth of runner plate 2b, inclination is set, can certainly obtain identical effect at the 4a of scroll portion.

In addition, substitute at the bottom of the tooth of runner plate 4b inclination is set, inclination is set, can certainly obtain identical effect at the crown of the 2a of scroll portion.

(embodiment 6)

Then, just describe based on the scroll compressor of the sixth embodiment of the present invention.Figure 11 is the major component sectional view of expression based on the scroll compressor of the sixth embodiment of the present invention, and Figure 12 is the plan view of the rotary vortex rotary part of scroll compressor shown in Figure 11.In addition, the formation of the scroll compressor of present embodiment since with above-mentioned the 3rd embodiment be roughly the same formation, so only describe and the explanation of omitting other with regard to the major component of each scroll element.Like this, also be same to formation from the 7th to the tenth following embodiment.

As shown in the figure, in order to increase from the inside all side of outer circumferential side, and at the bottom of the tooth of the runner plate 4b of rotary vortex rotary part 4, inclination is set at the bottom of the tooth of the runner plate 4b that makes rotary vortex rotary part 4 under the normal temperature state and second gap 16 of the thrust direction between the crown of the 2a of scroll portion of fixed scroll member 2.In addition, in the housing section 37 of the capacity eccentric bearing 36 shown in the oblique line portion of Figure 12, at the bottom of the tooth of the runner plate 4b of rotary vortex rotary part 4, par 38 is set.

An example for this inclination gives the account in greater detail.Figure 13 is the chart of the tooth Bottom Shape of the rotary vortex rotary part after the high loaded process that is illustrated in the scroll compressor shown in Figure 11.At the bottom of the tooth of the runner plate 4b of rotary vortex rotary part 4 because be urged on fixed scroll member, owing to produced pressure distortion, so become the such shape of figure by applying high pressure to runner plate back side portion.Particularly in the housing section 37 of the capacity eccentric bearing 36 of rotary vortex rotary part 4, because runner plate thickness is the thinnest, thus since pressure distortion, the par with minimum runner plate thickness 38 that formation figure is such.

Therefore, be arranged to the crown of the 2a of scroll portion of fixed scroll member 2 at the bottom of the tooth of the runner plate 4b of rotary vortex rotary part 4 and scheme identical shape, press so that bear impartial face.

According to above-mentioned formation, in the housing section 37 of the little capacity eccentric bearing 36 of the thickness of the runner plate 4b of rotary vortex rotary part 4, even under the situation of the pressure distortion that the pressure reduction that produces because of head pressure and suction pressure causes, also because at the bottom of the tooth of the runner plate 4b of rotary vortex rotary part 4 and the crown of the 2a of scroll portion of fixed scroll member 2 be not comprehensive engagement, but contact equably, so can realize high reliability and the high efficiency when turning round since the initial stage.

(embodiment 7)

Then, just describe based on the scroll compressor of the seventh embodiment of the present invention.Figure 14 is the major component sectional view of expression based on the scroll compressor of the seventh embodiment of the present invention.

As shown in figure 14, on the crown of the 2a of scroll portion of fixed scroll member 2, from the mode that the inside all sides of outer circumferential side reduce inclination is set with the scroll height, and in the scope relative with the housing section 37 of the capacity eccentric bearing 36 of rotary vortex rotary part 4, the height of the crown of the 2a of scroll portion by fixed scroll member 2 is set is the par 38 of minimum constructive height size, also same effect can be arranged certainly.

(embodiment 8)

Then, just describe based on the scroll compressor of the eighth embodiment of the present invention.Figure 15 is the major component sectional view of expression based on the scroll compressor of the eighth embodiment of the present invention.

As shown in the figure, for first gap 15 of the thrust direction between at the bottom of the tooth of the runner plate 2b of the crown of the 4a of scroll portion that makes rotary vortex rotary part 4 under the normal temperature state and fixed scroll member 2 increases from the inside all sides of outer circumferential side, and on the crown of the 4a of scroll portion of rotary vortex rotary part 4, inclination is set.

In compression process, because become high temperature by producing the heat of compression at central part, so the crown of the 4a of scroll portion of rotary vortex rotary part 4 raises because of thermal expansion along with becoming central part, but for first gap 15 that makes thrust direction increases from the inside all sides of outer circumferential side, because the crown at the 4a of scroll portion of rotary vortex rotary part 4 is provided with inclination, so can not contact, just can realize reliability and the high efficiency when turning round since the initial stage with at the bottom of the tooth of the runner plate 2b of fixed scroll member 2.

(embodiment 9)

Then, just describe based on the scroll compressor of the ninth embodiment of the present invention.Figure 16 is the major component sectional view of expression based on the scroll compressor of the ninth embodiment of the present invention.

As shown in figure 16, for first gap 15 of the thrust direction between at the bottom of the tooth of the runner plate 2b of the crown of the 4a of scroll portion that makes rotary vortex rotary part 4 and fixed scroll member 2 increases from the inside all sides of outer circumferential side, by at the bottom of the tooth of the runner plate 2b of fixed scroll member 2, inclination being set, also same effect can be arranged certainly.

(embodiment 10)

Then, just describe based on the scroll compressor of the tenth embodiment of the present invention (not shown go out).

In the scroll compressor of present embodiment, fixed scroll member 2 is formed by iron type materials, and rotary vortex rotary part 4 is to carry out surface treatment on aluminium class material, forms hardened layer in its surface.As this surface treatment, implement pellumina processing, PVD processing, the processing of nickel plating phosphorus etc.

According to above-mentioned formation, the head pressure height of compressor, only make rotary vortex rotary part 4 can not leave the back pressure of fixed scroll member 2 if pay, then rotary vortex rotary part 4 is pressed against on the fixed scroll member 2 powerfully, but by the formed hardened layer of surface treatment that rotary vortex rotary part 4 is carried out, just can obtain not can sintering, the scroll compressor that reliability is high.In addition, in the system that becomes the many refrigeration agents of big capacity, though when the transient state running of starting or defrosting etc., generation is returned to the liquid tempestuously of scroll compressor, because this liquid is returned, lubricant oil is washed by liquid refrigerant, it is harsh that lubricating status becomes, but the hardened layer that forms by this surface treatment just can sintering, and making runs up becomes possibility.

In addition, at refrigeration agent is high-pressure refrigerant, for example under the situation of carbon dioxide, the head pressure of compressor is than high more than about 7-10 times as the on high-tension side pressure of the freeze cycle in the past of refrigeration agent with freon, but in the present invention, the temperature strain and the pressure distortion of rotary vortex rotary part 4 and fixed scroll member 2 have been considered, owing to be not to contact partly, press but be subjected to uniform face, so can realize high reliability and the high efficiency scroll compressor that begins from start of run.

The effect of invention

The present invention is with at the bottom of the tooth of fixing runner plate and the thrust direction between the crown of rotation scroll section First gap and the tooth of rotation runner plate at the bottom of and the fixing thrust direction between the crown of scroll section Second gap forms the shape that increases gradually from the inside all sides of outer circumferential side, and with first gap Form greater than second gap. According to the present invention because first gap and second gap from outside In the week side direction all sides increase gradually, so can guarantee to cause because of thermal expansion distortion than the lowland The contact-making surface of each scroll section is pressed, even simultaneously owing to discharge pressure, fixed scroll member becomes downwards Shape is convex form, also because first gap bigger than second gap absorbs the amount of this pressure distortion, So can keep equably connecing at the bottom of the tooth of the crown of fixed scroll member and rotary vortex rotary part Touch pressure. Therefore, can not produce adhesion or inordinate wear, can provide and guarantee high reliability Scroll compressor.

In addition, the present invention is that the height that changes rotation scroll section forms first gap, changes rotation The thickness of runner plate forms second gap. According to the present invention, first gap and second gap are become Be the shape that increases gradually from the inside all sides of outer circumferential side, and make first Gap-Ratios, second gap big, Just make simple low cost become possibility. Accordingly, eliminated because of thermal deformation or pressure distortion and made The adhesions that become etc. can provide the scroll compressor with high reliability.

In addition, the present invention is that the height that changes rotation scroll section forms first gap, changes fixing The height of scroll section forms second gap. According to the present invention, make first gap and second gap Become the shape that increases gradually from the inside all sides of outer circumferential side, and make first Gap-Ratios, second gap Greatly, just make simple low cost become possibility. Accordingly, eliminated because of thermal deformation or pressure distortion And the adhesion that causes etc. can provide the scroll compressor with high reliability.

In addition, the present invention changes fixedly that the thickness of runner plate forms first gap, the change revolving mirror The thickness of plate forms second gap. According to the present invention, first gap and second gap are become The shape that increases gradually from the inside all sides of outer circumferential side, and make first Gap-Ratios, second gap big, Just make simple low cost become possibility. Accordingly, eliminated because of thermal deformation or pressure distortion and made The adhesions that become etc. can provide the scroll compressor with high reliability.

In addition, the present invention changes fixedly that the thickness of runner plate forms first gap, changes fixing the volume The height of body forms second gap. According to the present invention, first gap and second gap are become Be the shape that increases gradually from the inside all sides of outer circumferential side, and make first Gap-Ratios, second gap big, Just make simple low cost become possibility. Accordingly, eliminated because of thermal deformation or pressure distortion and made The adhesions that become etc. can provide the scroll compressor with high reliability.

In addition, the present invention uses carbon dioxide as cold-producing medium, makes the thickness of rotation runner plate little In 3.0 times of the height that rotates scroll section. According to the present invention, with respect to the carbon dioxide system of use Discharge in the situation of cryogen is pressed and is sucked the pressure reduction of pressing, by thickness and the scroll section that makes runner plate The height rotary vortex rotary part that becomes appropriate relation flexibly be out of shape, guarantee more equably Contact at the bottom of the tooth of the crown of fixed scroll member and rotary vortex rotary part, thereby can not Produce adhesion or inordinate wear, the scroll compressor of having guaranteed high reliability can be provided.

In addition, the present invention uses HFC class or HCFC class cold-producing medium as cold-producing medium, The thickness that makes the rotation runner plate is less than 1.0 times of the height of rotation scroll section. According to the present invention, phase Press and suck for the discharge in the situation of using HFC class or HCFC class cold-producing medium and press Pressure reduction, the thickness by making runner plate and the height of scroll section become the rotation whirlpool of appropriate relation Revolve parts and flexibly be out of shape, guaranteed more equably crown and the rotation vortex of fixed scroll member Contact at the bottom of the tooth of parts, thus can not produce adhesion or inordinate wear, can provide true Protected the scroll compressor of high reliability.

In addition, the present invention uses HC class cold-producing medium as cold-producing medium, makes the thick of rotation runner plate Degree is less than 0.6 times of the height that rotates scroll section. According to the present invention, with respect to using the HC class Discharge in the situation of cold-producing medium is pressed and is sucked the pressure reduction of pressing, by thickness and the scroll that makes runner plate The rotary vortex rotary part that the height of section becomes appropriate relation flexibly is out of shape, and is more equably true Protected the contact at the bottom of the tooth of the crown of fixed scroll member and rotary vortex rotary part, thereby not Can produce adhesion or inordinate wear, the scroll compressor of having guaranteed high reliability can be provided.

In addition, the present invention forms fixed scroll member with the ferrous metal material, uses the aluminium metalloid Material forms rotary vortex rotary part, rotary vortex rotary part is carried out surface treatment, for making fixed mirror At the bottom of the tooth of plate and first gap of the thrust direction between the crown of rotation scroll section from outer circumferential side to Interior all sides increase, and the crown of rotation scroll section is tilted, and accordingly, are using two as cold-producing medium In the High Pressure Difference running of carbonoxide, even pressed against fixing volume at the bottom of the tooth of rotation runner plate powerfully On the crown of body, also can suppress inordinate wear by the surface treatment with hardened layer, no Producing sintering ground turns round.

In addition, according to the present invention, even in the system that becomes the many cold-producing mediums of big capacity, Liquid refrigerant return tempestuously the transient state running time, also can not can produce because of cleaning high Lubricating oil that the carbon dioxide liquid cryogen causes, on the thrust face of rotary vortex rotary part is cut Sintering disconnected or that cause because of the occurrence temperature rising turns round. In addition, because the rotation scroll portion Part forms with aluminium class material, thus the centrifugal force of the drive division in the time of can reducing to run up, And can excellent in te pins of durability, can reduce slippage loss.

Have again, according to the present invention, at the bottom of the tooth that makes fixing runner plate and the crown of rotation scroll section Between first gap of thrust direction increase from the inside all side of outer circumferential side, by making the rotation vortex The crown of scroll section tilt, even for the high temperature that in compression process, produces at central part The heat of compression also can prevent the contact at the crown of the central part of the scroll section of rotary vortex rotary part.

In addition, the present invention be make the minimum constructive height of the rotation scroll section of interior all sides for more than or equal to outside 99.6% of the maximum height of the rotation scroll section of all sides, but less than 100%, accordingly, can One side reduces from the leakage loss of the face of tooth of each scroll section, and one side prevents the crown of each scroll section The adhesions of face etc. will be suppressed at from the leakage that crown begins Min., can improve simultaneously pressure The performance of contracting machine and guarantee reliability.

In addition, the present invention uses carbon dioxide as cold-producing medium, forms with the ferrous metal material Fixed scroll member forms rotary vortex rotary part with the aluminium metalloid material, to rotation scroll section Carry out surface treatment beyond the crown, accordingly, even in compression process, producing at central part The heat of compression of high temperature, also can prevent the tooth at the central part of the scroll section of rotary vortex rotary part The contact of point. That is, even hypothesis is in the situation of the crown contact of the central part of scroll section, also Because the crown to rotation scroll section does not carry out surface treatment, on-stream can sintering and transfer Solidating decide the crown of scroll element and fixedly at the bottom of the tooth of runner plate between the gap of thrust direction, institute With do not need processing, just can make compressor performance raising and reliability and deposit, so can To seek cost degradation.

In addition, the present invention is at the bottom of the tooth that makes the rotation runner plate and fixedly between the crown of scroll section Second gap of thrust direction increases from the inside all sides of outer circumferential side, and inclines at the bottom of making the tooth that rotates runner plate Tiltedly, accordingly, under the High Pressure Difference running of using carbon dioxide as cold-producing medium, fixed scroll section Part prevents the crown contact of the scroll section of fixed scroll member by pressure-strain or temperature strain At the bottom of the tooth of rotation runner plate, can seek high reliability.

In addition, the present invention is as surface treatment, carry out that pellumina is processed, PVD process with And in processing any one of nickel plating phosphorus, accordingly, even at the high pressure of carbon dioxide coolant Difference is lower, and the wearing and tearing of the overlay film with hardened layer that produces because sliding reduce, even long-time the use Still remaining have a surface treatment overlay film, can sintering, can seek high reliability.

In addition, the present invention is to carrying out the surface-treated part, and carrying out milled processed, polishing Process or the barreling processing, accordingly, the roughness that causes by reducing surface treatment can be worked for Ask and utilize to reduce the performance that slippage loss brings and improve, in the time of particularly can seeking to turn round from the initial stage The high efficiency of beginning.

In addition, the present invention is in scroll compressor, by making rotation vortex and fixing whirlpool What revolve is shaped as the most appropriateization, just can make at the bottom of the tooth of rotation vortex and the crown of fixed scroll equal Contact evenly, realize high reliability and the high efficiency when turning round since the initial stage.

The possibility of utilizing on the industry

According to the present invention, particularly in the situation that carbon dioxide is used as cold-producing medium, A kind of scroll compressor with high efficiency and high reliability can be provided. Like this, based on That scroll compressor of the present invention can be used as is home-use, the freezing air conditioner of professional usefulness airtight The type compressor utilizes. In addition, the action fluid is not limited in cold-producing medium, also goes for The vortex flow of the rotating compressor of air vortex, vavuum pump, oilless (oil free) compressor, Scrawl decompressor etc. The purposes of body machinery.

Claims

1. scroll compressor, the fixedly scroll portion of scroll and the rotation scroll portion of scroll are meshed and the formation pressing chamber, the fixedly scroll portion of described scroll erects from the fixedly runner plate of fixed scroll member, and the rotation scroll portion of described scroll erects from the rotation runner plate of rotary vortex rotary part; Make above-mentioned rotary vortex rotary part carry out the basic upper edge circular orbit rotation of rotation restriction by the rotation limting mechanism, the volume that one side continuously changes above-mentioned pressing chamber simultaneously sucks, compression, discharging refrigerant, it is characterized in that,

Use carbon dioxide as refrigeration agent,

Form the said fixing scroll element with the ferrous metal material, form above-mentioned rotary vortex rotary part with the aluminium metalloid material,

Above-mentioned rotary vortex rotary part is carried out surface treatment,

For at the bottom of the tooth that makes the said fixing runner plate and first gap of the thrust direction between the crown of above-mentioned rotation scroll portion increases from the inside all sides of outer circumferential side, the crown of above-mentioned rotation scroll portion is tilted.

2. scroll compressor as claimed in claim 1 is characterized in that, in making the minimum constructive height of the above-mentioned rotation scroll portion of all sides for more than or equal to 99.6% of the maximum height of the above-mentioned rotation scroll portion of outer circumferential side, but less than 100%.

3. scroll compressor as claimed in claim 1 or 2, it is characterized in that, for at the bottom of the tooth that makes above-mentioned rotation runner plate and second gap of the thrust direction between the crown of said fixing scroll portion increases from the inside all sides of outer circumferential side, and make the tooth slanted floor of above-mentioned rotation runner plate.

4. scroll compressor as claimed in claim 1 or 2 is characterized in that, as above-mentioned surface treatment, carries out that pellumina is handled, PVD handles and nickel plating phosphorus any one in handling.

5. scroll compressor as claimed in claim 1 or 2 is characterized in that, to carrying out above-mentioned surface-treated part, carries out grinding disposing, polishing treatment or barreling and handles.