CN103270307B - There is the scroll compressor of split type fixed eddy plate - Google Patents
There is the scroll compressor of split type fixed eddy plate Download PDFInfo
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- CN103270307B CN103270307B CN201180060621.3A CN201180060621A CN103270307B CN 103270307 B CN103270307 B CN 103270307B CN 201180060621 A CN201180060621 A CN 201180060621A CN 103270307 B CN103270307 B CN 103270307B
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- fixed scroll
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
- F04C18/0253—Details concerning the base
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
There is a scroll compressor for split type fixed eddy plate, comprising: housing; Fixed scroll supporting element, is arranged in described housing; Fixed scroll, is connected to fixed scroll supporting element and rotation is circumferentially limited; Around movable orbiting scroll, be constructed by and engage with fixed scroll and form pressing chamber; And main frame, install in the housing, and be constructed to support around movable orbiting scroll.
Description
Technical field
The present invention relates to the scroll compressor with split type fixed eddy plate, particularly relate to the scroll compressor that can perform squeeze operation while perform the moving motion relative to fixed eddy plate around movable orbiting scroll.
Background technique
Generally speaking, scroll compressor is the compressor that volume by changing the pressing chamber that a pair whirlpool facing with each other dish is formed carrys out compression refrigerant gas.Due to this scroll compressor and reciprocal compressor or rotary compressor phase specific efficiency higher, vibrate lower, noise is less, size is less and weight is lighter, is thus widely used in air-conditioning.
According to method refrigeration agent being supplied to pressing chamber, this scroll compressor can be divided into low-pressure type and high pressure type.More specifically, low-pressure type scroll compressor is constructed such that refrigeration agent is sucked in pressing chamber by the inner space of housing indirectly.Here, the inner space of housing is divided into suction space and emission quotas.On the other hand, high-pressure type scroll compressor is constructed such that refrigeration agent is not directly inhaled into pressing chamber via the inner space of housing, and is discharged into the inner space of housing.Here, the inner space of housing is implemented as emission quotas.
Also according to the encapsulating method of pressing chamber, scroll compressor can be divided into end sealing type and back-pressure sealing type.More specifically, end sealing type is configured so that when compressor operation, and the apex seal that the scrollwork end of a whirlpool dish is installed moves up and is attached to the end plate of relative whirlpool dish.On the other hand, back-pressure sealing type is constructed such that to form back pressure chamber in the rear surface of a whirlpool dish, and along with the oil or refrigeration agent with intermediate pressure is introduced into this back pressure chamber, whirlpool dish attaches to relative whirlpool dish because of the effect of the pressure in back pressure chamber.Usually, end sealing type is applied to low-pressure type scroll compressor, and back pressure type is applied to high pressure type scroll compressor.
A side of fixed eddy plate is provided with fixed scroll, and this fixed scroll engages with the moving scrollwork around movable orbiting scroll.Because the end plate be integrally formed with fixed scroll is connected to the main frame in order to support around movable orbiting scroll, therefore fixed scroll engages with main frame.
Summary of the invention
Technical problem
Fixed scroll forms pressing chamber by engaging with moving scrollwork.In order to make to minimize with the frictional loss of moving scrollwork, fixed scroll needs the shape with accurately processing.Fixed scroll as final products obtains by accurately processing the semifinished product first manufactured by die casting.Complicated manufacturing process and high manufacture cost can be caused like this.
In addition, depend on the difformity of fixed scroll and moving scrollwork, compression volume, compression ratio etc. all dissimilate.Therefore, as long as compressor has different capacity and shape, new fixed scroll just must be designed to manufacture.Like this, (expending) plenty of time can be caused when Design and manufacture fixed scroll.
Technological scheme
Therefore, the solution of the present invention is to provide a kind of scroll compressor with split type fixed scroll, the fixed scroll of this scroll compressor can easily manufacture, and when this fixed scroll is applied to different compressors, one or more parts of this fixed scroll are general.
In order to realize these and other advantage, and according to object of the present invention, comprise as herein institute specializes a kind of scroll compressor also broadly described: housing; Fixed scroll supporting element is in the housing installed; Fixed scroll, is connected to fixed scroll supporting element, is limited to make the rotation circumferentially of this fixed scroll; Moving scrollwork, is constructed by and engages with fixed scroll and form pressing chamber; And main frame, install in the housing, and be constructed to support around movable orbiting scroll.
The fixed scroll engaged with moving scrollwork can be divided into two-part: fixed scroll and fixed scroll supporting element.By multiple fixed scroll is installed to a fixed scroll supporting element, one or more parts of fixed scroll can be common to the various compressors with different capabilities or structure.In addition, because need the fixed scroll of accurately processing can separate with fixed scroll supporting element, so when fixed scroll is by overall processing, the comparable housing of fixed scroll is more easily processed.
Here, fixed scroll can be fixed scrollwork supports support can move towards moving scrollwork.Can allow like this to compensate by mobile fixed scroll the tolerance that the gap location between fixed scroll and moving scrollwork exists.
Fixed scroll and fixed scroll supporting element are coupled to each other by any mode, such as, by using key or fixing pin.Key or fixing pin can form in the wherein one of fixed scroll and fixed scroll supporting element.Fixed scroll and fixed scroll supporting element can be enable so easily to be coupled to each other, and not to need excessive pressure or coupling force.
All can be provided with floss hole in fixed scroll supporting element and fixed scroll, compressed fluid is discharged by this floss hole.Due to the structure that fixed scroll and fixed scroll supporting element are separated from each other, the fluid compressed by the gap between fixed scroll and fixed scroll supporting element may be revealed.For preventing this leakage, Sealing can be plugged between fixed scroll and fixed scroll supporting element.Here, Sealing can be arranged to the floss hole around fixed scroll.
According to the Operation Conditions of compressor, the pressure being applied to suction side may be very low.In this case, anti-vacuum system may be needed to prevent suction pressure too low.Usually, the pressure being applied to suction side may increase owing to making emission quotas and suction space interact with each other.For this reason, fixed scroll etc. can be provided with discharge pressure path.For the ease of processing, fixed eddy plate can be divided into two parts, and discharge pressure path can form interface between the two sections.More specifically, be separated with one of fixed scroll with fixed scroll supporting element when the Sealing pressure reduction that can be configured between suction side with waste side is greater than predefined value, be introduced into suction side to enable the fluid of waste side.
Once the outer circumferential face at fixed scroll and the interface between movable orbiting scroll is set to suction side, i.e. low voltage side, even if so fixed scroll or fixed scroll supporting element are not additionally processed, also the high-pressure liquid along the interface motion between fixed scroll and fixed scroll supporting element can be introduced this suction side.
Also can be divided into two parts as fixed eddy plate around movable orbiting scroll.More specifically, can comprise around movable orbiting scroll the moving scrollwork that engages with fixed eddy plate and supported by main frame and support the moving scrollwork supporting element of moving scrollwork, can move towards moving scrollwork.More specifically, fixed scroll and moving scrollwork can be constructed to removable vertically.Can allow so successfully to compensate larger machining tolerance or assembling tolerance, and the increasing number of the parts that dissimilar compression function is general can be made.
The back pressure chamber communicated with pressing chamber can be formed between moving scrollwork with moving scrollwork supporting element.This back pressure chamber can be formed between scroll wraps and base portion, and can be embodied as the other space of separating with another space in compressor.The upper surface of back pressure chamber can be limited by scroll wraps, and its lower surface can be limited by base portion.Pressure in back pressure chamber can put on scroll wraps and base portion respectively.But, because base portion is supported by main frame, so only have scroll wraps can be moved to fixed eddy plate by the pressure of back pressure chamber.
Seal arrangement for sealing back pressure chamber can be plugged between scroll wraps and base portion.O type ring can be used as seal arrangement.
The back pressure hole being formed and back pressure chamber and pressing chamber are communicated with each other can be worn in scroll wraps.The length of back pressure hole can be enable so shorter.Therefore, the minimization of loss of back pressure can be made, and back pressure hole can be made easily to process.
Fixed scroll supporting element directly can be connected to main frame, or can be fixed to the inner wall surface of housing.In the later case, the fixed eddy plate supporting element being used for supporting fixed scroll supporting element vertically can be formed on main frame.Because fixed scroll supporting element is determined by fixed eddy plate supporting element relative to the relative position of main frame, so fixed scroll supporting element and main frame are by shrink-fit or weld and other fixtures need not be used to be fixed to housing.Whole packaging technology can be simplified like this.Or, can only by fixed scroll supporting element by shrink-fit or the inner wall surface being welded and fixed housing.
According to another aspect of the present invention, a kind of scroll compressor comprises: housing; Main frame is in the housing installed; Axle, is rotatably installed to main frame; Around movable orbiting scroll, be configured to carry out moving motion by axle; And fixed eddy plate, fixed scroll is connected to this fixed eddy plate, make by with to engage around movable orbiting scroll and the fixed scroll forming pressing chamber can move towards around movable orbiting scroll.
Beneficial effect
Scroll compressor of the present invention can have following advantages.
First, because fixed eddy plate is divided into two parts, so this fixed eddy plate can be more easily processed.
Secondly, this fixed scroll supporting element or fixed scroll can be common to dissimilar compressor.
By the detailed description hereafter provided, further Applicable scope of the present invention will become more remarkable.It is to be understood however that, although these are described in detail and specific example illustrates the preferred embodiments of the present invention, but it only illustratively provides, because to those skilled in the art, from detailed description hereafter, it should be apparent for being in the various change in the spirit and scope of the present invention and changing.
Accompanying drawing explanation
Present specification comprises accompanying drawing to provide a further understanding of the present invention, and these accompanying drawings are combined in specification and form a part for specification, shows multiple one exemplary embodiment and is used for explaining principle of the present invention together with text description.
In the drawings:
Fig. 1 is the sectional view of the internal structure of the scroll compressor illustrated according to the first embodiment of the present invention;
Fig. 2 is the zoomed-in view of the Partial Resection of the press part of Fig. 1;
Fig. 3 is the three-dimensional exploded view of the fixed eddy plate of the Fig. 1 watched from upside;
Fig. 4 is the three-dimensional exploded view of the fixed eddy plate of the Fig. 1 watched from downside;
Fig. 5 is the three-dimensional exploded view around movable orbiting scroll of Fig. 1;
Fig. 6 is the amplification view around movable orbiting scroll of Fig. 1;
Fig. 7 A to 7C is the planimetric map of the operation process of the scroll compressor of the Fig. 1 schematically shown according to the first embodiment of the present invention;
Fig. 8 is the chart of the different thrust of the position of the back pressure hole around movable orbiting scroll illustrated according to Fig. 1; And
Fig. 9 is the zoomed-in view of the Partial Resection of the press part of scroll compressor according to a second embodiment of the present invention.
Embodiment
Multiple one exemplary embodiment is described in detail now with reference to accompanying drawing.In order to reference the description of accompanying drawing concise and to the point for the purpose of, identical or equivalent parts represent with identical reference character, and no longer will repeat it and describe.
Hereinafter, the preferred embodiment according to scroll compressor of the present invention is described with reference to the accompanying drawings in more detail.
Fig. 1 is the sectional view of the internal structure of the scroll compressor illustrated according to the first embodiment of the present invention, Fig. 2 is the zoomed-in view of the Partial Resection of the press part of Fig. 1, and Fig. 3 and Fig. 4 is respectively from the three-dimensional exploded view of the fixed eddy plate of Fig. 1 of the upper side and lower side viewing.
As shown in Figures 1 to 4, scroll compressor of the present invention comprises housing 1, and the inner space of housing 1 is divided into suction space 11(low voltage side) and emission quotas 12(high pressure side).Be configured to the suction space 11 being installed in housing 1 for generation of the drive motor 2 of rotating force.Main frame 3 is fixedly mounted between the suction space 11 of housing 1 and emission quotas 12.Fixed eddy plate 4 is fixedly mounted on the upper surface of main frame 3.Be connected to being installed between main frame 3 and fixed eddy plate around movable orbiting scroll 5 of the crankshaft 23 of drive motor 2 prejudicially.The pressing chamber (P) of a pair continuous moving is jointly formed around movable orbiting scroll 5 and fixed eddy plate 4.Fixed eddy plate 4 is installed in and between movable orbiting scroll 5 for preventing the cross slip-ring rotated around movable orbiting scroll 5.
Suction pipe 13 is connected to the suction space 11 of housing 1 to be communicated with it, and discharge pipe 14 is connected to the emission quotas 12 of housing 1 to be communicated with it.
Although not shown in the figures, housing establishes Packed emission quotas, and the exhaust chamber that this emission quotas is fixedly coupled to fixed eddy plate 4 is divided into suction space (low voltage side) and emission quotas (high pressure side).Or the inner space of housing can be separated end plate (not shown) by height-low pressure and be divided into suction space and emission quotas, and height-low pressure is separated the upper surface that end plate is fixed to fixed eddy plate, and attaches to the inner peripheral surface of housing.
Fixed eddy plate 4 is made up of with the fixed scroll 42 of the bottom surface being connected to end plate 41 end plate 41 being fixed to main frame 3.Fixed scroll 42 forms involute shape, will illustrate after a while with the moving scrollwork 52(around movable orbiting scroll 5) together with form pressing chamber (P).The outer circumferential face of the end plate 41 of fixed eddy plate 4 forms suction port (not shown), the suction space 11 of housing 1 is communicated with pressing chamber (P).Form floss hole 44 at the central part of the end plate 41 of fixed eddy plate 4, communicate with pressing chamber (P) to make the emission quotas 12 of housing 1.Unaccounted reference character 7 represents subframe, and 8 represent escape cock, and 21 represent stator, and 22 represent rotor.
In the present invention, refrigeration agent is introduced into the low voltage side sucking space 11(housing 1 by suction pipe 13 from outside).Then, the low pressure refrigerant sucked in space 11 is introduced into fixed eddy plate 4 by the suction port of fixed eddy plate 4, then moves to the central part around movable orbiting scroll and fixed eddy plate.Then, refrigeration agent is compressed, and then is discharged into the emission quotas 12 of housing by the floss hole 44 of fixed eddy plate 4.These processes are repeatedly performed.
With reference to Fig. 3 and Fig. 4, the bottom surface of end plate 41 is formed with space portion, inserts wherein for fixed scroll 42.A pair keyed portion 41a is formed at the outer circumferential face of this space portion.Fixed scroll 42 forms pair of keys shape insertion part 42a to make it towards keyed portion 41a.End plate and fixed scroll can be coupled to each other in the mode of key connecting, and fixed scroll can be moved towards main frame.Here, keyed portion is integrally formed at end plate place.But, the present invention is not limited thereto.More specifically, keyed portion can be integrally formed at fixed scroll place, or can be implemented as another component separated with end plate and fixed scroll.
The outer circumferential face of end plate 41 is formed four the leg 41b extended towards main frame 3.Each leg 41b is provided with Bolt Connection opening, and the leg 31 of main frame 3 is formed as towards leg 41b.Once Bolt Connection opening received by the state second line of a couplet that bolt contacts the leg 31 of main frame 3 at the leg 41b of end plate 41, then end plate and main frame are coupled to each other.Because main frame 3 is connected to housing 1 in the stationary state, so the end plate 41 being connected to main frame 3 is also connected to housing 1 in the stationary state.
End plate and main frame are spirally connected each other under the state be separated from each other with intended distance by leg.Accuracy to size can be improved like this.In addition, fixed scroll is installed into and can removes from end plate.Like this, even if make the distance between end plate and main frame not be in default scope due to machining tolerance, also can allow successfully to compensate tolerance etc.
Be formed with through hole 41c, 42b respectively to form floss hole 44 at the central part of end plate and the central part of fixed scroll, high-pressure refrigerant is discharged through this floss hole.Be fixed to the outer circumferential face of the through hole 42b of fixed scroll 42 with inserted mode as the O type ring 43 of seal arrangement.
As previously mentioned, fixed scroll is installed into and can removes from end plate 41.Therefore, compressed refrigeration agent not only can be discharged into floss hole 44, and can be discharged into the interface between end plate and fixed scroll.In order to prevent the leakage of compressed refrigerant, O type ring 43 can be installed as previously described.
Here, the width of O type ring 43 is controlled as and prevents suction side to have vacuum state.More specifically, when causing the low on fuel in compressor among the vaporizer, condenser etc. that are present in refrigeration compression cycle device due to a large amount of oil, operate under the state that compressor is blocked by valve in refrigerant path.Oil can be allowed like this to stay in refrigerant path, vaporizer or condenser, and be collected in compressor.In these processes, the pressure drop of the suction side caused due to the lack of refrigerant of suction side need be avoided.
Once the width of O type ring 43 is properly controlled, then, when the pressure reduction of suction side and waste side is less than preset level (normal state), O type ring 43 is by the clearance seal between end plate and fixed scroll.Can prevent high-pressure refrigerant from leaking like this.Pressure reduction between suction side and waste side is higher than (that is, when the hypotony of suction side) during presetting level, and the pressure (with reference to Fig. 1) being applied to the bottom surface of fixed scroll is lower.Therefore, fixed scroll moves to main frame, makes the upper surface of O type ring 43 be separated with end plate 41 thus.High-pressure refrigerant can be made like this to be introduced in suction side along the interface between fixed scroll and end plate.Therefore, without the need to using other path that discharge pressure is introduced suction side, the hypotony of suction side can just be avoided.
Of the present invention in movable orbiting scroll 5, scroll wraps and end plate can as formation integral with one another in the prior art.But, as shown in Figure 5 and Figure 6, be of the present inventionly constructed to scroll wraps and end plate are separated from each other around movable orbiting scroll 5.More specifically, to be of the present inventionly made up of the scroll wraps 50 engaged with fixed scroll 42 and the base portion 60 that is connected to scroll wraps 50 around movable orbiting scroll 5.The scrollwork flange 54 that scroll wraps 50 comprises moving scrollwork 52 and is integrally formed with moving scrollwork 52, this moving scrollwork 52 forms pressing chamber by engaging with fixed scroll 42.Scrollwork flange 54 is formed as dish type, and forms the keyed portion 56 being connected to base portion 60 in the both sides of the bottom surface of scrollwork flange 54.
Base portion 60 receives scroll wraps 50 at the state second line of a couplet of the bottom surface towards scrollwork flange 54.More specifically, base portion 60 base flange 64 that comprises the dish type being formed as similar scrollwork flange 54 and be formed in base flange 64 bottom surface on and be connected to the boss part 68 of crankshaft 23.
The Liang Ge edge of the upper surface of base flange 64 forms the keyhole being connected to keyed portion 56 respectively.When keyed portion inserts keyhole, scroll wraps 50 can move relative to the direction of base portion 60 along crankshaft, but can not move along the radial direction of base portion or circumference.Scroll wraps 50 motion is vertically subject to the restriction in the gap between fixed eddy plate and main frame 3.Therefore, keyed portion 56 keeps the state inserting keyhole 66.More specifically, by keyed portion is inserted keyhole, scroll wraps 50 and base portion 60 are reliably connected each other, without using being spirally connected or welding.
For the bottom surface preventing the cross slip-ring 6 rotated around movable orbiting scroll 5 to be connected to base portion 60.More specifically, cross slip-ring 6 is provided with the ring part 6a contacted with the bottom surface of base flange 64.There is 180(degree each other) a pair first protuberance 6b of phase difference are formed in the both sides of the bottom surface of ring part 6a.First protuberance 6b inserts in the first protuberance groove 3a of main frame 3.There is 180(degree each other) a pair second protuberance 6c of phase difference are formed in the both sides of the upper surface of ring part 6a.Second protuberance 6c be inserted into be formed in base flange 64 bottom surface on the second protuberance groove 64a.
Based on these structures, even if the rotating force of crankshaft 23 is passed to base portion 60, base portion 60 carries out moving motion also can be prevented from the state rotated in the effect because of cross slip-ring 6 under.And, be connected to base portion 60 so that the scroll wraps 50 with radially limited motion also carries out moving motion together with base portion 60.
Form back pressure chamber 62 at the middle part of the upper surface of base flange 64, the inner space of this back pressure chamber is separated by O type ring 62a.With reference to Fig. 4, back pressure chamber 62 is arranged between the bottom surface of scrollwork flange 54 and the upper surface of base flange 64.To insert and the inner space of back pressure chamber 62 and low voltage side 11 cut off by the O type ring 62a being fixed to base flange 64.Base flange 64 wears and is formed with back pressure hole 64a, the inner space of back pressure chamber 62 communicates with each other via this back pressure hole and pressing chamber.
When suck and compressed refrigerant time, be introduced in back pressure chamber via back pressure hole 54a by a part for the refrigeration agent compressed in pressing chamber.Because the internal pressure of back pressure chamber is higher than the peripheral pressure of base flange 64, so base portion 60 moves vertically from scroll wraps 50.Can make like this can carry out seal operation between the bottom surface of fixed eddy plate and moving scrollwork 52.
Here, the internal pressure of back pressure chamber can be determined according to the position of back pressure hole.More specifically, when back pressure hole is shifted near when the central part of the moving scrollwork 52 of movable orbiting scroll, the internal pressure of back pressure chamber increases.On the other hand, when back pressure hole moves towards the outside of the moving scrollwork 52 around movable orbiting scroll, the internal pressure of back pressure chamber reduces.
Fig. 7 A to 7C schematically shows the planimetric map by according to the moving scrollwork of the first embodiment of the present invention and the process of fixed scroll compressed refrigerant.Here, solid line corresponds to the center line of fixed scroll 42, and dotted line corresponds to the center line of moving scrollwork 52.Fig. 7 C illustrates the operation starting discharge process when the pressure of pressing chamber reaches discharge pressure.As previously mentioned, the pressure in the pressing chamber formed by moving scrollwork and fixed scroll changes continuously during compression process.Therefore, in a compression cycle, the also consecutive variations of the pressure on any point of moving scrollwork.
Such as, during compression process when back pressure hole is in the some place being applied in discharge pressure, the pressure identical with discharge pressure is applied to back pressure chamber.In the case, due to excessive back pressure, the thrust between the bottom surface of fixed eddy plate and moving scrollwork is comparatively large, therefore causes large loss due to friction.In addition, according to the difference of amount of compressive load being applied to compressor, discharge pressure dissimilates.Therefore, when back pressure hole be positioned at apply point " a " place of discharge pressure time, according to the difference of load, thrust is dissimilated.The performance of compressor can be affected like this.More specifically, point " a " is in the scope at discharge beginning angle.
Point " b " represents the position of the discharge pressure of applying one scheduled time, applies the intermediate pressure between suction pressure and discharge pressure in all the other time.Therefore, when back pressure hole is formed in point " b " place, suitable back pressure can be obtained.In addition, even if discharge pressure is changed due to reasons such as load variations, also this discharge pressure can be compensated to a certain extent due to this intermediate pressure.The impact of the performance because load changes on compressor can be reduced like this.It is in the scope of 180 ° that the present inventor has confirmed that point " b " is in the involute phase difference starting angle with the discharge of moving scrollwork.
The position of intermediate pressure is only applied during point " c " represents compression process.When forming back pressure hole at point " c " place, back pressure is too low, makes the sealability being difficult to realize.Refrigrant leakage can be caused like this.
Fig. 8 illustrates when back pressure hole is positioned at point " a " and point " b " place, the figure of each thrust under low load, overload, High Pressure Difference and high pressure ratio condition.
With reference to Fig. 8, when back pressure hole is positioned at point " a " place, under the condition of low load, produce excessive thrust, the thrust under corresponding condition has large deviation each other.On the other hand, when back pressure hole is positioned at point " b ", produce less thrust under low load conditions, the thrust under corresponding condition has little deviation each other.
The end plate of fixed eddy plate is non-essential is fixed to housing 1 in an indirect way by main frame.That is, the end plate of fixed eddy plate can directly be connected to housing 1.Fig. 9 shows according to a second embodiment of the present invention, and the end plate of fixed eddy plate is directly connected to housing.Except press part, the parts of the second embodiment are identical with the parts of the first embodiment, therefore by the description thereof will be omitted.
With reference to Fig. 9, as in the first embodiment, the fixed eddy plate 110 of the second embodiment is divided into two parts: end plate 112 and fixed scroll 114.The central part of end plate 112 and the central part of fixed scroll 114 form floss hole 44.O type ring 116 to be inserted in fixed scroll 114 so that around this floss hole, prevents high-pressure refrigerant from leaking thus.When the end plate 11 of fixed scroll 114 is coupled to each other by sleeve bolt, fixed scroll 114 can move towards around movable orbiting scroll, but can not radially move with circumference.
Be made up of scroll wraps 122 and base portion 124 around movable orbiting scroll 120, scroll wraps 122 engages with fixed scroll 114 and forms pressing chamber, and base portion 124 supports scroll wraps 122 can move towards fixed scroll 114.
Scroll wraps 122 and base portion 124 are coupled to each other by keyed portion 126, and the O type ring 128 for the formation of back pressure chamber inserts and is fixed to the central part of base portion 124.
Cross slip-ring 6 is connected to the bottom surface of fixed eddy plate 120, thus prevents moving whirlpool disc spins.
Main frame 130 is positioned on the rear surface of movable orbiting scroll, and has the post 132 that three end plates 112 towards fixed eddy plate extend.The quantity of post 132 is not with being limited shown in scheming.The bottom surface of end plate 112 is arranged on the upper end of post 132, and in the rank portion 134 that the upper end that fixed scroll 114 is arranged on adjacent posts 132 is formed.Here, the distance between the upper end of rank portion 134 and post 132 is greater than the thickness of fixed scroll.Scrollwork previous-next can be enable like this to move and obtain rim space.
End plate 112 is arranged on the upper end of post 132, and is fixed by welding to housing 1.That is, post 132 supports end plate 12, make its compressor assembled and operation while be in exact position.Such end plate just can be fixed to exact position without the need to using other fixture.In addition, even if the height of these posts is inconsistent, or there is tolerance on the position of end plate, but because fixed scroll or scroll wraps can move up and down, the tolerance therefore existed also can be compensated.Therefore, do not need accurately to control the gap between end plate and main frame.
Because post 132 prevents end plate 112 to move downward, and end plate 112 is fixed to housing 1, and therefore these posts can have little thickness.Can allow like this to obtain the compression volume wider than the first embodiment under housing 1 has the condition of same external diameter.More specifically, in a first embodiment, because leg is bolted to main frame, so leg must have the thickness being greater than predetermined value, therefore, it is possible to obtain the processing space of the opening that is spirally connected and can coupling force be kept.Compression volume can be caused like this to reduce.On the other hand, in a second embodiment, by reducing the thickness of post, compression volume is increased.
In addition, because the outer surface of post is consistent with the outer surface of end plate, so be arranged on the state on post at end plate under, post and end plate are fixed to housing by shrink-fit simultaneously.According to the method, main frame and end plate are connected to housing by single operation.Whole assembling process can be simplified like this.
Fixed eddy plate with around the wherein one of movable orbiting scroll, or fixed eddy plate and can as being integrally formed with main frame in the prior art around movable orbiting scroll, and fixed eddy plate can be supported by multiple post.When fixed eddy plate is with when being integrally formed with main frame around one of movable orbiting scroll, machining tolerance can be compensated while fixed eddy plate with another movement in movable orbiting scroll.Or, when fixed eddy plate with when being all integrally formed with main frame around movable orbiting scroll, due to when adopting back pressure method, can move up and down by back pressure around movable orbiting scroll, therefore can compensate machining tolerance.
Previous embodiment and advantage are only exemplary, should not be interpreted as limitation of the present invention.The content of institute's teaching can be easily applied to the device of other types.This specification is intended to annotate, and the scope of unrestricted claims.Many replacement schemes, change and modification will be apparent to those skilled in the art.Multiple features of one exemplary embodiment described herein, structure, method and other characteristics can variously carry out combining to obtain other and/or alternative one exemplary embodiment.
Because these features some forms can be implemented and not deviate from its characteristic, so it is also to be understood that, if not be otherwise noted, above-described embodiment is all not limited to any details in aforementioned specification, and be construed broadly in the scope that should limit at following claims, so all modification in the spirit and scope falling into claims or in the equivalent of these spirit and scope and change all ought to contain by following claims.
Claims (12)
1. a scroll compressor, comprising:
Housing, it is divided into suction space and emission quotas;
Fixed scroll supporting element, is arranged in described housing;
Fixed scroll, is connected to described fixed scroll supporting element, is limited by this fixed scroll supporting element to make the rotation circumferentially of this fixed scroll;
Around movable orbiting scroll, be constructed by and engage with described fixed scroll and form pressing chamber; And
Main frame, is arranged in described housing, and is constructed to around movable orbiting scroll described in support,
Wherein on the bottom surface of this fixed scroll supporting element, be formed with space portion, described fixed scroll inserts this space portion can move vertically, and
Wherein said fixed scroll in the space portion of described fixed scroll supporting element circumferentially limit by key.
2. scroll compressor as claimed in claim 1, the inner peripheral surface of wherein said space portion is communicated to described emission quotas, and the outer circumferential face of described space portion is communicated to described suction space.
3. scroll compressor as claimed in claim 1, wherein forms a pair keyed portion on described space portion, and
Described fixed scroll forms pair of keys shape insert port to make it towards described keyed portion.
4. scroll compressor as claimed in claim 3, wherein said key and described fixed scroll or described fixed scroll supporting element are integrally formed.
5. scroll compressor as claimed in claim 1, wherein between described fixed scroll and described fixed scroll supporting element, plug a Sealing, and described Sealing is arranged to surround the floss hole of described fixed scroll.
6. scroll compressor as claimed in claim 5, when pressure reduction wherein between suction side and waste side is greater than presetting level, one of them with described fixed scroll supporting element of described Sealing and described fixed scroll is separated, and makes the fluid of described waste side be introduced into described suction side.
7. scroll compressor as claimed in claim 6, wherein said suction side is implemented as the outer circumferential face at described fixed scroll and described interface between movable orbiting scroll.
8. scroll compressor as claimed in claim 1, wherein saidly comprises around movable orbiting scroll:
Moving scrollwork, engages with described fixed scroll; And
Moving scrollwork supporting element, is supported by described main frame, and is constructed to support described moving scrollwork and can moves towards described fixed scroll to make described moving scrollwork.
9. scroll compressor as claimed in claim 8, wherein forms the back pressure chamber communicated with described pressing chamber between described moving scrollwork with described moving scrollwork supporting element.
10. scroll compressor as claimed in claim 9, is wherein inserted with the seal arrangement sealing described back pressure chamber between described moving scrollwork and described moving scrollwork supporting element.
11. scroll compressors as claimed in claim 10, wherein on described moving scrollwork, be formed with back pressure hole to penetrate mode, described back pressure chamber and described pressing chamber are communicated with each other by this back pressure hole.
12. scroll compressors as claimed in claim 1, wherein said fixed scroll supporting element is fixed to the inner wall surface of described housing, and
Fixed eddy plate supporting element is formed with, in order to support described fixed scroll supporting element vertically at described main frame place.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2011-0002844 | 2011-01-11 | ||
| KR1020110002844A KR101803872B1 (en) | 2011-01-11 | 2011-01-11 | Scroll compressor with split type fixed scroll |
| PCT/KR2011/009615 WO2012096444A1 (en) | 2011-01-11 | 2011-12-14 | Scroll compressor with split type fixed scroll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103270307A CN103270307A (en) | 2013-08-28 |
| CN103270307B true CN103270307B (en) | 2016-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180060621.3A Active CN103270307B (en) | 2011-01-11 | 2011-12-14 | There is the scroll compressor of split type fixed eddy plate |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101803872B1 (en) |
| CN (1) | CN103270307B (en) |
| WO (1) | WO2012096444A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443377A (en) | 2014-06-10 | 2016-03-30 | 丹佛斯（天津）有限公司 | Scroll compressor |
| CN105443388B (en) | 2014-06-10 | 2018-09-04 | 丹佛斯（天津）有限公司 | Rack and screw compressor for screw compressor |
| CN114278561B (en) * | 2021-12-24 | 2023-11-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Fixed scroll and scroll compressor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133401A (en) * | 1993-08-30 | 1996-10-16 | 三菱重工株式会社 | Vortex type fluid machinery |
| CN1383472A (en) * | 2000-06-22 | 2002-12-04 | 三菱重工业株式会社 | Scrawl compressor |
| CN1420967A (en) * | 2000-12-22 | 2003-05-28 | 毕彻制冷机有限公司 | Compressor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200145355Y1 (en) * | 1996-12-19 | 1999-06-15 | 윤종용 | Scroll compressor |
| KR100208096B1 (en) * | 1997-07-29 | 1999-07-15 | 윤종용 | Frame manufacturing method of a scroll compressor |
| KR200194851Y1 (en) * | 1997-12-17 | 2000-09-01 | 전주범 | Noise decreasing device of scroll compressor |
-
2011
- 2011-01-11 KR KR1020110002844A patent/KR101803872B1/en active IP Right Grant
- 2011-12-14 WO PCT/KR2011/009615 patent/WO2012096444A1/en active Application Filing
- 2011-12-14 CN CN201180060621.3A patent/CN103270307B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133401A (en) * | 1993-08-30 | 1996-10-16 | 三菱重工株式会社 | Vortex type fluid machinery |
| CN1383472A (en) * | 2000-06-22 | 2002-12-04 | 三菱重工业株式会社 | Scrawl compressor |
| CN1420967A (en) * | 2000-12-22 | 2003-05-28 | 毕彻制冷机有限公司 | Compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120081486A (en) | 2012-07-19 |
| CN103270307A (en) | 2013-08-28 |
| KR101803872B1 (en) | 2017-12-04 |
| WO2012096444A1 (en) | 2012-07-19 |
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