CN103459850A

CN103459850A - Scroll compressor

Info

Publication number: CN103459850A
Application number: CN2011800695429A
Authority: CN
Inventors: 林哲广; 饭塚敏; 昆努; 阿久泽克城; 相田健二; 清川保则; 杉本和禧
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 2011-03-24
Filing date: 2011-09-26
Publication date: 2013-12-18
Also published as: JP5914810B2; JPWO2012127719A1; WO2012127719A1

Abstract

[Problem] To provide a scroll compressor capable of supplying more oil to secure the minimum oil supply quantity necessary even during low-speed rotation. [Solution] A scroll compressor includes: a communication passage (51) formed in a moving scroll (25), which discharges oil from a high-pressure portion in a casing to a space between panels of a fixed scroll (23) and the moving scroll (25); and a communication hole (53) formed in the communication passage (51) of the panel section of the moving scroll (25), the communication hole (53) approaching the vicinity of the entrance of a low-pressure portion (27A) of a compression chamber surrounded by wraps of both the fixed scroll (23) and the moving scroll (25), and extending to and opening at the panel surface. A narrow oil groove is formed in the fixed scroll (23) and supplies oil to the compression chamber. In the panel of the fixed scroll (23) approaching the wall surface portion of the moving scroll (25), an oil receiving hole (231) is formed in the oil groove, with the oil receiving hole (231) constantly overlapping and communicating with the communication hole (53) as the moving scroll (25) revolves so as to orbit on the top surface of the fixed scroll (23).

Description

Scroll compressor

Technical field

The present invention relates to scroll compressor, relate in particular to the scroll compressor of the lubricant oil deficiency produced in the time of can preventing the slow-speed of revolution in frequency variator machine etc.

Background technique

In the past, as an example of the compressor of compressed refrigerant in refrigeration cycle, for example, known had a kind of scroll compressor.Scroll compressor is to possess compressing mechanism in casing, and this compressing mechanism has: but outstanding fixed scroll and the orbiter that is provided with intermeshing Vorticose scrollwork.Fixed scroll is fixed on casing, but orbiter is connected the eccentric axial portion of live axle.And, can rotation but orbiter is only revolved round the sun with respect to fixed scroll, thus, make to be formed on the volume reducing of the pressing chamber between two scrollworks, and section is compressed within it to refrigeration agent.

In addition, in this compressor, a kind of following structure has been proposed, this compressor comprises: but to the oil circuit of the engaging piece supplying lubricating oil of low pressure one side of fixed scroll and orbiter, dispose the flow restriction parts in this oil circuit, these flow restriction parts have the main body (for example, with reference to patent documentation 1) that periphery is formed with the helical path.

But, in the flow restriction parts such, permissible flow can depend on the size of the helical path be formed on the main body periphery, so the requirement on machining accuracy of helical path is high, and the problem that exists processing to become difficult.Therefore, proposed a kind ofly to require hardly machining accuracy, and can realize with low cost the scroll compressor (for example, with reference to patent documentation 2) of the flow restriction of lubricant oil.

, as shown in Figure 8 and Figure 9, in this scroll compressor 100, but high pressure opening 111D and intercommunicating pore 112 be in orbiter 110 upper sheds, the end of this high pressure opening 111D extends with straight line shape its inside the time open facing outward, and is communicated with the high-voltage section 121 in seal container 120; Low voltage section 130 upper sheds of this intercommunicating pore 112 in scroll, this scroll compressor 100 comprises: lubricant oil is supplied to the communication path 113 of the low voltage section 130 in scroll from high-voltage section 121.In addition, the reference character in figure 122 means: but be embedded into the eccentric axial portion of the live axle in the lug boss 115 of orbiter 110 with the state that can rotate.

On communication path 113, be formed with an end lower hole 113A open facing outward, and be formed with patchhole 113B, this patchhole 113B is positioned at the position of the prescribed depth of this time hole 113A.And, on communication path 113, be inserted with pin parts 140 and make it and the inner end butt of lower hole 113A, the diameter of these pin parts 140 is slightly less than the patchhole 113B of this communication path 113, for these pin parts 140 are pressed against to the inner end side, seal an end of this communication path 113 by screw component 141.

In the scroll compressor 100 formed like this, the mobile of lubricant oil described, from the high-voltage section 121 in the compressor 100 in high pressure conditions, but the communication path 113 via orbiter 110, and indoor towards the low voltage section in low-pressure state 130 of pressing chamber, supplied with the appropriate lubrication oil corresponding with differential pressure, but this pressing chamber is formed by orbiter 110 and fixed scroll 150 both sides' 114,151 of scrollworks.Particularly, in Fig. 8, the high-voltage section 121 that lubrication oil is interior from compressor 100, but communication path 113 and intercommunicating pore 112 via orbiter 110 sides, and by the oil groove 152 shown in Fig. 9 (A), thereby be fed into the surface of contact of two scroll 110,150 etc., this oil groove 152 is to carve in a narrow margin the lower surface of the scrollwork 151 that is located at fixed scroll 150.

The prior art document

Patent documentation

Patent documentation 1: TOHKEMY 2004-60532 communique

Patent documentation 2: TOHKEMY 2010-190168 communique

Summary of the invention

Yet, as shown in Fig. 9 (B), but when the relative position that the intercommunicating pore 112 of the roundlet shape of orbiter 110 sides of carrying out circular movement overlaps with the oil groove 152 of the stria shape of fixed scroll 150, but only be lubricated with oil 150 actions of supplying with from above-mentioned orbiter 110 to fixed scroll.In addition,, mean respectively the reference position (initial position) of intercommunicating pore 112 with 112A here; With 112B meaned the to revolve round the sun positions of 90 degree; With 112C meaned the to revolve round the sun positions of 180 degree; With 112D meaned the to revolve round the sun positions of 270 degree.Therefore, in the compressor 100 formed like this, due to intercommunicating pore 112, with respect to the size of oil groove 152 or around the difference that concerns of radius etc., so cannot treat different things as the same, but as a rule, not generally continuous fuel feeding action, but the action of desultory fuel feeding.

About such compressor, proposed and developed following compressor: according to the temperature variation of the various devices such as the refrigerating machine be connected with this compressor or air-conditioning, the rotating speed of the motor of pump is corresponding with load and the compressor etc. (below, be generically and collectively referred to as " variable speed type compressor ") of the corresponding and stage of development change type of the compressor of continually varying frequency conversion type or rotating speed and load occurs.In such variable speed type compressor, move as follows: when High Rotation Speed, fuel delivery increases, and fuel delivery reduces when low speed rotation.

Yet, about the relation of motor rotary speed and essential lubricants capacity, in general, when rotating speed reduces, the delivery volume of the lubricant oil of time per unit also reduces.Therefore, in the oil feeding mechanism of said structure, although along with the reduction of motor rotary speed, the essential fuel delivery of lubricant oil also reduces, but for example when the net time amount of fuel feeding action, with the net time amount of not fuel feeding action, compare when too short lubricant oil deficiency while causing the running under above-mentioned low speed rotation.

Like this, when causing lubricant oil not enough, but the frictional force in the contact segment of fixed scroll and orbiter increases.Due to such situation, in the compressor with the pump that is provided with above-mentioned oil feeding mechanism, just require to develop following compressor: when its low-speed running, can supply with minimal essential lubricant oil, in other words, even when the low speed rotation of motor, also can guarantee reliably minimal essential fuel delivery.

Therefore, In view of the foregoing, the purpose of this invention is to provide a kind of scroll compressor, it can interruptedly not be lubricated oily supply all the time, even also can guarantee reliably the essential fuel delivery of minimum limit when low speed rotation.

For achieving the above object, can provide following scroll compressor.

(1) scroll compressor of the present invention comprises: the fixed scroll that is fixed on casing inside; But and with the orbiter of described fixed scroll engagement,

But on any one party of described fixed scroll and orbiter, there is communication path, but described communication path is between minute surface for the surface that makes oil from the high-voltage section of described casing inside be discharged to each end plate of fixed scroll and orbiter, and there is intercommunicating pore on described communication path, but but described intercommunicating pore is adjacent with the low voltage section by orbiter and the formed pressing chamber of orbiter, and opening is until arrive minute surface

But on any the opposing party of fixed scroll and orbiter, have to the oil groove of the shape in a narrow margin of described pressing chamber fuel feeding,

Described scroll compressor is characterised in that,

But on any one party of described fixed scroll and orbiter, and be provided with and be subject to oilhole on described oil groove, but when orbiter along the minute surface of fixed scroll around and while revolving round the sun action, the described oilhole that is subject to overlaps all the time with the position of described intercommunicating pore and is communicated with described intercommunicating pore.

(2) in the scroll compressor of above-mentioned (1), it is characterized in that, in the described mode that is subject to oilhole to carry out the Zone Full split shed of the described circumference inside when mobile on the circumference centered by assigned position at described intercommunicating pore; Perhaps with described be subject to oilhole at the Zone Full that comprises described circumference inside the mode at interior wider border circular areas split shed, but dig out the described oilhole that is subject on the header portion of any one party of fixed scroll and orbiter.

(3) in addition, scroll compressor of the present invention comprises: the fixed scroll that is fixed on casing inside; But and with the orbiter of described fixed scroll engagement,

But the inside at orbiter has communication path, but described communication path is between minute surface for the surface that makes oil from the high-voltage section of described casing inside be discharged to each end plate of fixed scroll and orbiter, but and there is intercommunicating pore on the communication path of the header portion of described orbiter, but adjacent near the entrance of the low voltage section of described intercommunicating pore and the pressing chamber that surrounded by fixed scroll and these both sides' of orbiter scrollwork, and opening is until arrive minute surface

On described fixed scroll, have to the oil groove of the shape in a narrow margin of described pressing chamber fuel feeding,

Described scroll compressor is characterised in that,

But on described fixed scroll, adjacent with the minute surface part of described orbiter header portion, and be provided with and be subject to oilhole on described oil groove, but when orbiter along the circumferential ring of the specified diameter of the minute surface of fixed scroll around and while revolving round the sun action, the described oilhole that is subject to overlaps all the time with the position of described intercommunicating pore and is communicated with described intercommunicating pore.

(4) in the scroll compressor of above-mentioned (3), it is characterized in that, but with described be subject to oilhole at intercommunicating pore along with thereby the mode of the Zone Full split shed of the described circumference inside of circumference while moving is carried out in the revolution of described orbiter action; Perhaps with described be subject to oilhole at the Zone Full that comprises described circumference inside the mode at interior wider border circular areas split shed, dig out the described oilhole that is subject on fixed scroll.

(5) in the scroll compressor arbitrarily in above-mentioned (1)～(4), it is characterized in that,

Described intercommunicating pore and be subject to the opening of oilhole to be positive toroidal,

But, when the groove width of the described oil groove radius that is d, intercommunicating pore is the displacement amount of r orbiter while carrying out around action while being Δ S, the described outside dimension D of the opening of oilhole that is subject to meets following relation,

ΔS＋2r≦D

Wherein, r: the radius size of intercommunicating pore;

D: the outside dimension that is subject to oilhole;

Δ S: but displacement amount when orbiter carries out around action.

(6) in the scroll compressor arbitrarily in above-mentioned (1)～(5), it is characterized in that, described scroll compressor is to utilize the frequency conversion control of turning round.

The effect of invention

According to the scroll compressor of above-mentioned (1), even when being turned round with low speed rotation, also owing to can interruptedly not being lubricated all the time oily supply, so can guarantee reliably minimal essential fuel delivery.Thus, the wearing and tearing that produce due to the friction that can suppress along with contact segment, so there is following advantage: through for a long time, also can improve durability for a long time, even and also can improve reliability when being turned round with low speed rotation.

According to the scroll compressor of above-mentioned (2), but thereby due to can be by the header portion of any one party of fixed scroll and orbiter, dig out the simple circle with prescribed level and form and be subject to oilhole, so also obtained the such effect of easy processing.

According to the scroll compressor of above-mentioned (3), even when being turned round with low speed rotation, also owing to can interruptedly not being lubricated all the time oily supply, so can guarantee reliably minimal essential fuel delivery.Thus, the wearing and tearing that produce due to the friction that can suppress along with contact segment, so there is following advantage: through for a long time, also can improve durability for a long time, even and also can improve reliability when being turned round with low speed rotation.

According to the scroll compressor of above-mentioned (4), thus due to can be by the header portion of fixed scroll, dig out the simple circle with prescribed level and form and be subject to oilhole, so also obtained the such effect of easy processing.

According to the scroll compressor of above-mentioned (5), owing to can being formulated the openings of sizes that is subject to oilhole, so can quantitatively and exactly form and be subject to oilhole.

According to the scroll compressor of above-mentioned (6), even with the low speed rotation action of turning round, also can carry out smooth and easy and reliably this running action.

The accompanying drawing explanation

Fig. 1 means the longitudinal section of the scroll compressor of an embodiment of the invention.

Fig. 2 is the longitudinal section at other positions in this scroll compressor.

Fig. 3 is the sectional view along the III-III line of Fig. 1.

Fig. 4 is the sectional view along the IV-IV line of Fig. 1.

But Fig. 5 mean one embodiment of the present invention scroll compressor fixed scroll oil groove and be subject to the orbiter in oilhole intercommunicating pore around the action explanatory drawing.

But Fig. 6 be schematically mean one embodiment of the present invention scroll compressor orbiter around the action explanatory drawing.

Fig. 7 is the sectional view along the VII-VII line of Fig. 4.

Fig. 8 is in the communication path of the Watch with magnifier fixed scroll that is shown in scroll compressor in the past, insert the sectional view of the state of pin parts.

Fig. 9 (A) means the worm's eye view of the state when mirrored sides of the fixed scroll from the compressor shown in Fig. 8 is observed, and Fig. 9 (B) has amplified the explanatory drawing of key position in order to be illustrated in the relative position relation that is subject to oilhole and intercommunicating pore in its α section.

Embodiment

Below, with reference to accompanying drawing, explain embodiments of the present invention.

Fig. 1 means the figure of the scroll compressor in internal high pressure 1 of embodiment of the present invention, this compressor 1 with for refrigerant circulation the refrigerant circuit that carries out outside the diagram of refrigeration cycle running action, be connected, and carry out compressed refrigerant by VFC.

This compressor 1 has: the casing 3 of lengthwise airtight dome cylindraceous.This casing 3 is to be configured to pressurized container by chassis body 5, bowl-shape upper cover 7 and bowl-shape lower cover 9, and the inside of this casing 3 becomes cavity, and this chassis body 5 is the main parts cylindraceous with the axis extended along the vertical direction; This bowl-shape upper cover 7 is welded airtightly and is bonded on integratedly the upper end portion of chassis body 5, and has the convex surface projected upwards; This bowl-shape lower cover 9 is welded airtightly and is bonded on integratedly the underpart of chassis body 5, and has outstanding convex surface downwards.

In the inside of casing 3, contain for the scroll compression body 11 of compressed refrigerant and the drive motor 13 that is configured in the below of this scroll compression body 11.Scroll compression body 11 is connected by live axle 15 with drive motor 13, and this live axle 15 is configured in casing 3 in the mode of extending along the vertical direction.In addition, between scroll compression body 11 and drive motor 13, being formed with clearance space is high-pressure space 17.

But scroll compression body 11 comprises frame 21, fixed scroll 23 and orbiter 25, this frame 21 is storage members that the round-ended cylinder shape is roughly arranged of opening to upside; This fixed scroll 23 is close to the upper surface that is configured in this frame 21; But should be configured between these fixed scrolls 23 and frame 21 by orbiter 25, and mesh with fixed scroll 23.Along whole circumferencial direction, all being pressed into and being fixed on chassis body 5 in the outer circumferential face of frame 21.In addition, be divided into the high-pressure space 17 of frame 21 belows and the 29，Ge space,

discharge space

17,29 of frame 21 tops in casing 3 and be communicated with via pod 71, this pod 71 carries out longitudinal extension and forms on the periphery of frame 21 and fixed scroll 23.

Drive motor 13 comprises: the stator 13A that is fixed on the ring-type on the internal face of casing 3; And the rotor 13B formed in this stator 13A inboard in the mode rotated freely.This motor 13 consists of the d.c. motor of VFC mode, on rotor 13B, but drives the orbiter 25 that is connected with scroll compression body 11 via live axle 15.

The lower space 91 of the below of drive motor 13 is retained as high pressure, and the inner bottom part at the lower cover 9 suitable with its underpart, stored oil.In live axle 15, be formed with the fuel supply path 15B as the part of high pressure oil feed unit, but this fuel supply path 15B is communicated with the grease chamber 52 at the back side of orbiter 25.In the lower end of live axle 15, be connected with the pick-up part outside diagram, this pick-up part is for picking up the oil in the inner bottom part storage of lower cover 9.This oil after picking up is via the fuel supply path 15B of live axle 15, thereby but is fed into the grease chamber 52 at the back side of orbiter 25 1 sides.And, but from this grease chamber 52 via being arranged on communication path described later 51 orbiter 25 and intercommunicating pore 53(with reference to Fig. 7), thereby be fed to being subject in oilhole 231 of fixed scroll 23 1 sides, and be fed into each sliding parts of scroll compression body 11 and pressing chamber 27 (with reference to Fig. 3) from oil groove 23D.

On frame 21, be formed with supporting body 21A and the 21B of radial bearing section, this supporting body 21A rotates for the eccentric axial portion 15A that makes live axle 15; The 21B of this radial bearing section extends from the lower surface mediad below of this supporting body 21A.In addition, also be provided with radial bearing hole 21C on frame 21, this radial bearing hole 21C connects the lower end surface of the 21B of radial bearing section and supports between the bottom surface of body 21A, and the upper end portion of live axle 15 can embed in the 21C of this radial bearing hole and by its supporting rotatably.In addition, near the periphery edge of the lower face side of this supporting body 21A, along the inner peripheral surface of chassis body 5, vertically be provided with laminal oil trap 24, this oil trap 24 invades discharge tube 33 for preventing lubricant oil.

The refrigeration agent of refrigerant circuit is imported to the suction pipe 31(of scroll compression body 11 with reference to Fig. 2) by airtight perforation and be fixed on the upper cover 7 of casing 3, in addition, for making refrigeration agents in casing 3 be discharged to discharge tube 33 outside casing 3 by airtight perforation and be fixed on chassis body 5.Suction pipe 31 extends along the vertical direction in discharging space 29, and the inner end of suction pipe 31 connects the fixed scroll 23 of scroll compression body 11 and is communicated with pressing chamber 27, by this suction pipe 31, refrigeration agent is drawn in pressing chamber 27.

As shown in Figure 3, fixed scroll 23 consists of end plate 23A and scrollwork 23B, and this scrollwork 23B is formed on the lower surface of this end plate 23A and is vortex shape (involute shape).In addition, but at the upper surface with orbiter 25, be on the minute surface 230 of the fixed scroll 23 faced of minute surface 250, especially at the lower surface of the scrollwork 23B of refrigerant inlet side, there is oil groove 23D and be subject to oilhole 231 for what accept that oil discharges, this oil groove 23D be along the lower surface of this scrollwork 23B carve establish and be shape in a narrow margin; This is subject to oilhole 231 is, under the state overlapping in the part with this oil groove 23D, to dig out prescribed depth and form.

As shown in Figure 3 and Figure 5, the oilhole 231 that is subject to of present embodiment is arranged to have the positive toroidal of the D outer diameter of regulation by opening, and the D outer diameter of this regulation is greater than the groove width d of oil groove 23D.This is subject to the outside dimension D of the opening of oilhole 231, but the revolution of being stipulated than orbiter 25 action, the displacement amount Δ S during around action are larger, and meets following formula,

ΔS＋2r≦D ···（1）

Wherein, r: the radius size of intercommunicating pore 53

D: the outside dimension that is subject to oilhole 231

Δ S: but displacement amount when orbiter 25 carries out around action.

Here, for example as shown in Figure 6, " displacement amount Δ S " refers to, but the minute surface 230 at orbiter 25 with respect to fixed scroll 23 does not carry out under the constant state of rotation action and posture, but orbiter 25 on the circumference of specified diameter around and when action of revolving round the sun, along with this revolution action, but the far point that orbiter 25 is gone up in any direction (for example, the position of reference character 25-1 in this figure) and near point (for example, the position of reference character 25-2 in this figure) distance between, that is to say, displacement amount Δ S refers to side-play amount.In addition, in this Fig. 6, in order easily to understand side-play amount, schematically be illustrated, but, with respect to the profile of orbiter 25, described very turgidly side-play amount, but in fact, but side-play amount is far smaller than the boundary dimension of orbiter 25.

For this around action, but about any particle of orbiter 25, all move equally and be subjected to displacement.Therefore, as shown in Figure 5, but about the intercommunicating pore 53 of orbiter 25 described later, also centered by the assigned position O of the minute surface part of fixed scroll 23, and with same diameter D, with respect to fixed scroll 23, carry out relatively to action, that is to say that carrying out circumference moves.Therefore, but about the P(of each point arbitrarily of the intercommunicating pore 53 of minute surface 250 openings at orbiter 25, each position of reference character 53A～53D), go up all the only distance between mobile far point and near point in any direction.That is to say, its side-play amount is same consistent with displacement amount Δ S.

On the other hand, as shown in Figure 4, but orbiter 25 by end plate 25A and scrollwork 25B, formed, this scrollwork 25B is formed on the upper surface of this end plate 25A and is vortex shape (involute shape).And, but the scrollwork 23B of fixed scroll 23 is intermeshing with the scrollwork 25B of orbiter 25, thus, but, between fixed scroll 23 and orbiter 25, by two

scrollwork

23B, 25B, forms a plurality of pressing chamber 27(with reference to Fig. 1,2).

But, in orbiter 25, as shown in Figure 7, flow restriction parts (pin parts) 55 are inserted in communication path 51 described later.These pin parts 55 consist of the first pin 55A and the second pin 55B, in the lower hole 51A of the inboard of this first pin 55A embedding communication path 51; This second pin 55B and this first pin 55A butt, and in the patchhole 51B of the nearside of embedding communication path 51.For the second pin 55B and the first pin 55A integrally are pressed into to the inner end side, the screw component with hexagon ring that diagram is outer is screwed to interior threaded hole 51C, and screw component is for sealing the end (left end of Fig. 7) of patchhole 51B.In addition, screw component is fixed by binder etc. in mode that can not be loosening.

But orbiter 25 is by euclidean Ring 61 scroll 23 supporting that is fixed, but on the central part of the lower surface of the end plate 25A of orbiter 25, the outstanding lug boss 25C that is provided with the round-ended cylinder shape.On the other hand, in the upper end of live axle 15, be provided with eccentric axial portion 15A, but this eccentric axial portion 15A is embedded in the lug boss 25C of orbiter 25 in the mode that can rotate.

In addition, as shown in Figure 7, but, on the end plate 25A of orbiter 25, be formed with communication path 51, an end of this communication path 51 is open facing outward, and extend with straight line shape its inside.This communication path 51 is formed with the lower hole 51A of end communication path open facing outward.In this time hole 51A, implement fraising processing until reach the position of prescribed depth from an end, thereby form the patchhole 51B with prescribed depth.In addition, in the ingress of patchhole 51B, be provided with interior threaded hole 51C.The other end of communication path 51 (high pressure opening) but grease chamber's (high-voltage section in seal container) 52 at 51D and the back side of above-mentioned orbiter 25 be communicated with.In addition, intercommunicating pore 53 is in the inner peripheral surface upper shed of the inlet side of communication path 51, and the opening of this intercommunicating pore 53 is radius r and is positive toroidal.

But this intercommunicating pore 53 is along near the header portion of the orbiter 25 adjacent entrance of the low voltage section 27A of thickness direction, perforation and the pressing chamber of fixed scroll 23, but this intercommunicating pore 53 in the header portion upper shed of this orbiter 25 until arrive minute surface.In addition, as shown in Fig. 5 and Fig. 7, this intercommunicating pore 53 is via the pressing chamber 27(low voltage section 27A that is subject to oilhole 231 and the outside of fixed scroll 23) be communicated with, the pressing chamber 27 in this outside is formed between two scrollwork 23B, the 25B of two

scroll

23,25.

And then, on the live axle 15 of the 21B of radial bearing section of frame 21 downside, be provided with counterweight part 16, but this counterweight part 16 for and orbiter 25 or eccentric axial portion 15A etc. between obtain dynamic balancing, when by counterweight part 16, obtaining the balance of weight, live axle 15 rotation, but make thus orbiter 25 be revolved round the sun and can rotation.And, but along with the revolution of this orbiter 25, pressing chamber 27 is by the volume between two

scrollwork

23B, 25B is shunk to center, compresses the refrigeration agent sucked by suction pipe 31.

Central part at fixed scroll 23 is provided with tap hole 23C, and the gas refrigerant of discharging from this tap hole 23C is discharged to via expulsion valve 22 and discharges space 29.And this gas refrigerant is via the pod 71 on each periphery that is arranged on frame 21 and fixed scroll 23, thereby flow out in the space in the outside in the high-pressure space 17 of frame 21 belows, oil trap 24.This high-pressure refrigerant is finally via the discharge tube 33 be arranged on chassis body 5, thereby is discharged to outside casing 3.

Running action to this scroll compressor 1 describes.

When drive motor 13 drives, rotor 13B, with respect to stator 13A rotation, thus, makes live axle 15 rotations.When live axle 15 rotation, but at the orbiter 25 of scroll compression body 11, with respect to the posture of fixed scroll 23, keep under constant state, can rotation but orbiter 25 is only revolved round the sun.Thus, the refrigeration agent of low pressure, via suction pipe 31, attracted to pressing chamber 27 from the peripheral side of pressing chamber 27, and the refrigeration agent of this low pressure is compressed along with the volume-variation of pressing chamber 27.

Refrigeration agent after compressed just becomes high pressure, and be discharged to via expulsion valve 22 from pressing chamber 27 and discharge space 29, and via pod 71 set on each periphery at frame 21 and fixed scroll 23, thereby flow out to the outside of oil trap 24 of high-pressure space 17 sides of frame 21 belows.And, thereby this high-pressure refrigerant is discharged to outside casing 3 via discharge tube set on chassis body 5 33.Be discharged to the refrigeration agent outside casing 3, after being circulated in having omitted illustrated refrigerant circuit, thereby it is compressed again via suction pipe 31, to be inhaled into compressor 1, repeatedly carries out the circulation of refrigeration agent.

Below, the mobile of lubricant oil described.

The lubricant oil that the inner bottom part of the lower cover 9 in casing 3 stores is picked up by not shown pick-up part, this pick-up part is arranged on the lower end of the live axle 15 shown in Fig. 1,2, this lubricant oil is via the fuel supply path 15B of live axle 15, thereby but is fed into the grease chamber 52 of the high pressure conditions at orbiter 25 back sides.In addition, this lubricant oil is from the grease chamber 52 shown in Fig. 7, but via the communication path 51, the intercommunicating pore 53 that are arranged on orbiter 25, thereby and utilize differential pressure to be transported to be subject to oilhole 231, and then be transported to oil groove 23D(with reference to Fig. 3), then be fed into each sliding parts and the pressing chamber 27 of scroll compression body 11, this is subject to minute surface 230 upper sheds of oilhole 231 between two scroll, and this two scroll forms the pressing chamber 27 of the low-pressure state of fixed scroll 23 sides that are communicated with all the time with this intercommunicating pore 53.

In addition, the oil in for example being fed into pressing chamber 27, when two scroll central parts move to the pressing chamber of high pressure, along with flowing of the refrigeration agent of compressed high pressure conditions herein, discharge space 29 thereby be discharged to via expulsion valve 22.Like this, with be discharged to the lubricant oil of discharging space 29 together with the refrigeration agent of high pressure conditions via expulsion valve 22, thereby via pod 71, flow out in the high-pressure space 17 of below of frame 21, this pod 71 is arranged on each periphery of frame 21 and fixed scroll 23.And, although this oil is by casing inner wall section or motor part gap, thereby be stored in the inner bottom part of the lower cover 9 suitable with the underpart of lower space 91, but in this case, owing to being provided with laminal oil trap 24 or cup 26 etc. in high-pressure space 17, so can prevent that this oil from invading discharge tube 33, and can make this oil be recovered to the inner bottom part of lower cover 9.

Below, especially for distinctive structure of the present invention, be subject to oilhole 231, its effect is described.

When making scroll compressor 1 running, for example as shown in Figure 6, but the minute surface 230 at orbiter 25 with respect to fixed scroll 23 does not carry out the rotation action and keeps under the constant state of posture, but orbiter 25 carries out circular movement, i.e. revolution motion on the circumference of specified diameter.

Yet, in the structure in the past shown in Fig. 9 (B), but revolve round the sun when action when orbiter 25, along with this revolution action, even any particle place of going up in any direction, all distance between mobile far point and near point only.That is to say, only displacement offset Δ S.Therefore, for example at an arbitrary position, but the very little intercommunicating pore 112 of orbiter side at a time just becomes overlapping position relationship with the very thin oil groove 152 of fixed scroll side.Yet, but although and the relative size relation between the oil groove 152 of the stria shape of the very little intercommunicating pore 112 of basis orbiter side and fixed scroll side, but between aperture and stria, in general, under in a flash, but by the orbiter side around movement, and the situation that makes intercommunicating pore 112 break away from from the oil groove 152 of fixed scroll side is more.

But, in the present embodiment, as shown in Figure 3 and Figure 5, but with on the part of the oil groove 23D in the stria shape, for the mode of the prescribed level that covered of the Zone Full around action of the intercommunicating pore 53 to orbiter 25 sides, that is to say, the relation of above-mentioned to meet (1) formula is dug out the very large oilhole 231 that is subject to, and is made this be subject to minute surface 230 upper sheds of oilhole 231 in fixed scroll 23 sides on the minute surface 230 of fixed scroll 23 sides.And this is communicated with oil groove 23D by oilhole 231.

Thus, even but in the situation that orbiter 25 carry out around the action, as shown in Figure 5, but the intercommunicating pore 53 of orbiter 25 sides also in for example at a time around the initial position (reference position using it as phase angle.) 53A is upper, but through after Δ t of small time arbitrarily, this intercommunicating pore 53, on the position 53B of 90 degree phase angles that staggered from initial position, and carries out circular arc with the translation state and moves under this posture.Yet, even at this position 53B, intercommunicating pore 53 and also coincided with the upper and lower with overlapping state fully by oilhole 231.Therefore, to intercommunicating pore 53 with can not be cut off by transferring oil in oilhole 231.

Equally, about the position 53C of 180 degree phase angles that staggered from initial position, further the staggered position 53D of 270 degree, intercommunicating pore 53 also carries out circular arc in posture under constant translation state and moves.Therefore, even at these positions 53C, 53D, intercommunicating pore 53 and also coincided with the upper and lower with overlapping state fully by oilhole 231.Therefore, to intercommunicating pore 53, with being subject in oilhole 231, carry lubricant oil can not be cut off.In addition, in these action specifications, although understand the relativeness of the discontinuous time at intervals of the 90 degree phase places that often stagger, but continuous dislocation occurs in this relative position with the small time lag.Therefore, even at any time, intercommunicating pore 53 and all coincided with the upper and lower with overlapping state fully by oilhole 231, to intercommunicating pore 53 with can not be cut off by transferring oil in oilhole 231.

Therefore, according to present embodiment, but be fed into the oil in the grease chamber 52 of high pressure conditions at orbiter 25 back sides via the fuel supply path 15B of live axle 15, but from grease chamber 52 via the communication path 51, the intercommunicating pore 53 that are arranged on orbiter 25, but thereby and being subject in oilhole 231 of fixed scroll 23 sides of utilizing differential pressure to be transported to be communicated with all the time with the intercommunicating pore 53 of orbiter 25, and then be transported to oil groove 23D.

Yet, even in the situation that drive motor 13 with slow-speed of revolution running, due at intercommunicating pore 53 be subject to the state in being communicated with all the time between oilhole 231, so, to the oil of the supply such as between the scrollwork of two scroll, can not interrupt.Therefore, owing to can supplying with to both sides' contact position the lubricant oil of q.s, so can avoid the increase of the surface friction drag that causes because of the lubricant oil deficiency or the faults such as wearing and tearing of the both sides' that cause because of friction contact position.

In addition, the invention is not restricted to above-mentioned mode of execution, in the scope of the purport that does not break away from claims record, can implement various distortion.

For example, in the present invention, although but can form and be subject to oilhole in the orbiter side, but with as the present embodiment, in the fixed scroll side, form and compared by the situation of oilhole, only carry out around action, it is complicated that the shape in its hole just becomes, and need to increase machining period.In addition, in the present invention, be not limited to vertical as the present embodiment scroll compressor, certainly can also utilize horizontal scroll compressor.

In addition, the scroll compressor of present embodiment utilizes VFC to carry out work, but also can adopt running control of thermostatic type etc. etc.

In addition, can also comprise and there are the oily unit of returning of appropriate configuration or oily separating mechanism etc., it is for when the High Rotation Speed of drive motor, and oil is fed into via communication path, intercommunicating pore from the high-pressure section of casing inside the too much situation of the oil supply amount of low voltage section of pressing chamber and can makes this oil return.

The explanation of reference character

1: scroll compressor

11: scroll compression body

13: drive motor

13A: stator

13B: rotor

15: live axle

15A: eccentric axial portion

15B: fuel supply path

16: counterweight part

17: high-pressure space

21: frame

21A: supporting body

21B: radial bearing section

21C: radial bearing hole

22: expulsion valve

23: fixed scroll

23A: end plate

23B: scrollwork

23C: tap hole

23D: oil groove

230,250: minute surface

231: be subject to oilhole

24: oil trap

25: but orbiter

25A: end plate

25C: lug boss

27: pressing chamber

27A: low voltage section

29: discharge space

3: casing

31: suction pipe

33: discharge tube

5: chassis body

51: communication path

51A: lower hole

51B: patchhole

51C: interior threaded hole

52: grease chamber (high-voltage section in seal container)

53: intercommunicating pore

55: flow restriction parts (pin parts)

55A: the first pin

55B: the second pin

61: euclidean Ring

7: upper cover

71: pod

9: lower cover

91: lower space

Claims

1. a scroll compressor, comprising: the fixed scroll that is fixed on casing inside; But and with the orbiter of described fixed scroll engagement,

Described scroll compressor is characterised in that,

2. scroll compressor as claimed in claim 1, is characterized in that,

In the described mode that is subject to oilhole to carry out the Zone Full split shed of the described circumference inside when mobile on the circumference centered by assigned position at described intercommunicating pore; Perhaps with described be subject to oilhole at the Zone Full that comprises described circumference inside the mode at interior wider border circular areas split shed, but dig out the described oilhole that is subject on the header portion of any one party of fixed scroll and orbiter.

3. a scroll compressor, comprising: the fixed scroll that is fixed on casing inside; But and with the orbiter of described fixed scroll engagement,

Described scroll compressor is characterised in that,

4. scroll compressor as claimed in claim 3, is characterized in that,

With described be subject to oilhole at intercommunicating pore along with but thereby the mode of the Zone Full split shed of the described circumference inside of circumference while moving is carried out in the revolution of described orbiter action; Perhaps with described be subject to oilhole at the Zone Full that comprises described circumference inside the mode at interior wider border circular areas split shed, dig out the described oilhole that is subject on fixed scroll.

5. scroll compressor as described as any one in claim 1 to 4, is characterized in that,

ΔS＋2r≦D

Wherein, r: the radius size of intercommunicating pore;

D: the outside dimension that is subject to oilhole;

Δ S: but displacement amount when orbiter carries out around action.

6. scroll compressor as described as any one in claim 1 to 5, is characterized in that, described scroll compressor is to utilize the frequency conversion control of turning round.