CN1946939A

CN1946939A - Rotating fluid machine

Info

Publication number: CN1946939A
Application number: CNA2005800125167A
Authority: CN
Inventors: 增田正典
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2004-04-23
Filing date: 2005-04-20
Publication date: 2007-04-11
Anticipated expiration: 2025-04-20
Also published as: CN100447422C

Abstract

A rotating fluid machine is constructed such that an annular piston (22) is received inside annular cylinder chambers (C1, C2) of a cylinder (21) to form an outer cylinder chamber (C1) and an inner cylinder chamber (C2), that the cylinder (21) and the annular piston (22) relatively perform eccentric rotating motion, and that the rotating fluid machine has an eccentrically rotating piston mechanism (20) in which the cylinder chambers (C1, C2) are partitioned into first chambers (C1-Hp, C2-Hp) and second chambers (C1-Lp, C2-Lp). In order to prevent seizure and wear of the blade (23) and the annular piston (22) during operation and to prevent gas leakage between the first chambers (C1-Hp, C2-Hp) and the second chambers (C1-Lp, C2-Lp), the blade (23) and the annular piston (22) are relatively movably connected by an oscillation bush (27), and sliding surfaces (P1, P2) are provided on the blade (23), at sections at which the blade (23) is in contact with the annular piston (22) and the oscillation bush (27).

Description

Rotary type fluid machine

Technical field

The present invention relates to a kind of rotary type fluid machine, be particularly related to a kind of rotary type fluid machine with eccentric rotary-type piston mechanism, the rotary-type piston mechanism of this off-centre constitutes, internal configurations in the cylinder chamber of the ring-type that cylinder had has the annular piston that this cylinder chamber is divided into outside cylinder chamber and inboard cylinder chamber, and cylinder and annular piston relatively carry out off-centre and rotatablely move.

Background technique

In the past, as possessing annular piston carries out the eccentric rotary-type piston mechanism that off-centre rotatablely moves in the inside of the cylinder chamber of ring-type rotary type fluid machine, the volume-variation that existence follows the off-centre of annular piston to rotatablely move by cylinder chamber is come the compressor (for example, with reference to patent documentation 1) of compressed refrigerant.Shown in Figure 16 and Figure 17 (the XVII-XVII sectional drawing of Figure 16: omit hatching), in this compressor 100, in the housing 110 of closed type, take in the motor (not shown) of compressing mechanism (eccentric rotary-type piston mechanism) 120 and this compressing mechanism 120 of driving.

Above-mentioned compressor structure 120 has: the cylinder 121 with the C1 of cylinder chamber, C2 of ring-type; With the annular piston 122 that is configured among the C1 of this cylinder chamber, the C2.Above-mentioned cylinder 121 possesses the outside cylinder 124 and the inboard cylinder 125 of configuration concentrically with respect to one another, is formed with the above-mentioned C1 of cylinder chamber, C2 between outside cylinder 124 and inboard cylinder 125.

Above-mentioned cylinder 121 is fixed on the housing 110.In addition, the piston pedestal (piston base) 160 that annular piston 122 constitutes by circle is connected with the eccentric part 133a of the live axle 133 that is connected in motor, and carries out off-centre with respect to the center of this live axle 133 and rotatablely move.

Above-mentioned annular piston 122 constitutes while keeping following state to carry out off-centre and rotatablely moves, promptly, the outer circumferential face of this annular piston 122 a bit contact in fact that (so-called " contact in fact " is meant following state with the inner peripheral surface of outside cylinder 124, promptly, though tightly there is the small gap of the degree that oil film occurs, but the problem that can exist refrigeration agent from this gap, to leak not), simultaneously, differ on 180 ° the position a bit the contacting in fact of the inner peripheral surface of above-mentioned annular piston 122 therewith with the outer circumferential face of inboard cylinder 125 in phase place.Its result is formed with the outside C1 of cylinder chamber in the outside of annular piston 122, be formed with the inboard C2 of cylinder chamber in the inboard of annular piston 122.

Dispose outside blade 123A in the outside of above-mentioned annular piston 122,, dispose inboard blade 123B outside on the elongation line of lateral lobe sheet 123A in the inboard of above-mentioned annular piston 122.Outside blade 123A is subjected to the active force towards the radially inner side of annular piston 122, thereby the interior Zhou Duan of this outside blade 123A is crimped on the outer circumferential face of this annular piston 122.In addition, inboard blade 123B is subjected to the radial outside active force towards annular piston 122, thereby outer circumference end that should inboard blade 123B is crimped on the inner peripheral surface of this annular piston 122.

Outside blade 123A is divided into two with the C1 of outside cylinder chamber, and inboard blade 123B is divided into two with the inboard C2 of cylinder chamber.Specifically, above-mentioned outside blade 123A is divided into hyperbaric chamber (first Room) C1-Hp and low pressure chamber (second Room) C1-Lp with the C1 of outside cylinder chamber, and inboard blade 123B is divided into hyperbaric chamber (first Room) C2-Hp and low pressure chamber (second Room) C2-Lp with the inboard C2 of cylinder chamber.In outside cylinder 124, outside lateral lobe sheet 123A near be formed with suction port 141, this suction port 141 is communicated to the outside C1 of cylinder chamber from being located at suction pipe 114 on the above-mentioned housing 110.In addition, on annular piston 122, be formed with through hole 143 near this suction port 141, low pressure chamber C1-Lp, the C2-Lp of C1 of outside cylinder chamber and the inboard C2 of cylinder chamber communicates with each other by this through hole 143.In addition, exhaust port (not shown) is set on above-mentioned compressor structure 120, hyperbaric chamber C1-Hp, the C2-Hp that this exhaust port makes above-mentioned two C1 of cylinder chamber, C2 is communicated with high-pressure space S in the housing 110.

In addition, in this embodiment,, only allow annular piston 122 to carry out off-centre and rotatablely move (revolution), stop mechanism as rotation and be provided with crosshead (Oldham) mechanism 161 in the rotation that stops annular piston 122.

In this compressing mechanism 120, follow the rotation of live axle 133 when above-mentioned annular piston 122 and carry out off-centre when rotatablely moving, alternate repetition carries out the expansion of volume and dwindles respectively in C1 of outside cylinder chamber and the inboard C2 of cylinder chamber.And then, when the volume of each C1 of cylinder chamber, C2 enlarges, carry out in the C1 of cylinder chamber, C2, sucking the suction stroke of refrigeration agent from suction port 141, when volume dwindles, carry out the compression stroke of compressed refrigerant in each C1 of cylinder chamber, C2 and the discharge stroke that refrigeration agent is discharged from each C1 of cylinder chamber, C2 high-pressure space S in housing 110 by exhaust port.The high-pressure refrigerant that is expelled to the high-pressure space S of housing 110 flows out to the condenser of refrigerant circuit by the discharge tube 115 that is located on this housing 110.

On the other hand, as shown in figure 18, the example after the structure of Figure 17 carried out partial alteration is disclosed also in above-mentioned patent documentation 1.In this compressing mechanism 120, annular piston 122 is disconnected at a place, form C type shape, blade 123 passes this disconnection position and contacts with the inner peripheral surface of outside cylinder 124 and the outer circumferential face of inboard cylinder 125.The parts with above-mentioned blade 123 contacts of the inner peripheral surface of outside cylinder 124 form with the radius of curvature identical with the outer circumferential face of inboard cylinder 125.In addition, rotatablely move (revolution) and not rotation in order to make annular piston 122 carry out off-centre, and not shown cross axle mechanism is set around inboard cylinder 125.Suction stroke, compression stroke and discharge stroke that off-centre by annular piston 122 rotatablely moves and carries out refrigeration agent, this point is identical with the example of Figure 16 and Figure 17.

Patent documentation 1: Japanese kokai publication hei 6-288358 communique

Yet, in Figure 16, structure shown in Figure 17,

blade

123A, 123B carry out line with annular piston 122 and contact, in the structure shown in Figure 18, blade 123 carries out line with cylinder 124,125 and contacts, so when annular piston 122 carries out off-centre when rotatablely moving in the running, the load that contacting part is subjected to is bigger, this contacting part might wear and tear or sintering.

In addition, because parts carry out the line contact each other like this, so also there is the shortcoming of the sealing difference of contacting part.Therefore, in said structure, in C1 of outside cylinder chamber and the inboard C2 of cylinder chamber, refrigeration agent all can leak to low pressure chamber C1-Lp, C2-Lp from hyperbaric chamber C1-Hp, C2-Hp, and compression efficiency is reduced.

In addition, though in above-mentioned example, compressor has been described as fluid machinery, but at above-mentioned fluid machinery is under the situation of decompressor or pump, blade (123A, 123B) (123) also might wear and tear with the contacting part of annular piston 122, and gas also might leak between the first Room C1-Hp, C2-Hp and the second Room C1-Lp, C2-Lp.

Summary of the invention

The present invention proposes in view of such problem points, its purpose is to provide a kind of rotary type fluid machine, this rotary type fluid machine has eccentric rotary-type piston mechanism, the rotary-type piston mechanism of this off-centre constitutes, internal configurations in the cylinder chamber of the ring-type that cylinder had has the annular piston that this cylinder chamber is divided into outside cylinder chamber and inboard cylinder chamber, and cylinder and annular piston relatively carry out off-centre and rotatablely move, and then this cylinder chamber is divided into first Room and second Room by blade, in this rotary type fluid machine, the sintering of blade and annular piston and wearing and tearing in the time of can preventing to turn round, and can prevent that gas from leaking between first Room and second Room.

The structure that the present invention is achieved as follows promptly, is movably coupled together blade 23 and annular piston 22 mutually by connected element (swing lining) 27, makes parts carry out the face contact at connection part each other thus.

Specifically, first invention is a prerequisite with following rotary type fluid machine, that is, this rotary type fluid machine possesses:

Eccentric rotary-type piston mechanism 20, the rotary-type piston mechanism 20 of described off-centre has: cylinder 21, this cylinder 21 has the C1 of cylinder chamber, the C2 of ring-type; Annular piston 22, this annular piston 22 is accommodated among the C1 of cylinder chamber, the C2 prejudicially with respect to this cylinder 21, and the C1 of cylinder chamber, C2 are divided into outside C1 of cylinder chamber and the inboard C2 of cylinder chamber; And blade 23, this blade 23 is configured among the above-mentioned C1 of cylinder chamber, the C2, and each C1 of cylinder chamber, C2 are divided into the first Room C1-Hp, C2-Hp and the second Room C1-Lp, C2-Lp, and cylinder 21 and annular piston 22 relatively carry out off-centre and rotatablely move;

Drive the driving mechanism 30 of the rotary-type piston mechanism 20 of this off-centre; With

Take in the housing 10 of the rotary-type piston mechanism 20 of this off-centre.

In addition, this rotary type fluid machine is characterised in that, above-mentioned blade 23 is located at cylinder 21, and described rotary type fluid machine possesses connected element 27, this connected element 27 movably couples together above-mentioned annular piston 22 and blade 23 mutually, and above-mentioned connected element 27 possesses: with respect to the first slip surface P1 of annular piston 22; With the second slip surface P2 with respect to blade 23.In addition, said in the said structure " ring-type " not only comprises just round ring-type, also comprises oval and avette ring-type.

In this first invention, under the situation of the rotary-type piston mechanism 20 of off-centre as compressing mechanism, when this compressing mechanism was driven, cylinder 21 and annular piston 22 relatively carried out off-centre and rotatablely move.Carrying out this off-centre when rotatablely moving, annular piston 22 and blade 23 are relatively swung with predetermined oscillation center, and on the face direction of this blade 23 advance and retreat relatively.In addition, gas is inhaled among the C1 of this cylinder chamber, the C2 when the volume of the C1 of cylinder chamber, C2 enlarges, and this gas is compressed when the volume of the C1 of this cylinder chamber, C2 dwindles.

In this invention, when blade 23 and annular piston 22 moved (relative wobbling action and advance and retreat action) by connected element 27, connected element 27 utilizes slip surface P1, P2 and annular piston 22 and blade 23, and both carried out face in fact and contact.In addition, because parts utilize slip surface P1, P2 to carry out face contact each other, so can reduce to act on the load of the average unit area of this contact position.

Second invention is in the rotary type fluid machine of first invention, it is characterized in that, annular piston 22 forms the C type shape of the part disconnection of annulus, blade 23 constitutes, wall from the wall of interior all sides of the C1 of cylinder chamber, the C2 of ring-type to outer circumferential side runs through the disconnection position of annular piston 22 and extends, connected element 27 is swing linings 27, has: above-mentioned blade 23 is held in the blade groove 28 that can advance and retreat; With the circular-arc outer circumferential face of swinging the disconnection position that remains in above-mentioned annular piston 22 freely.

In this second invention, when driving eccentric rotary-type piston mechanism 20, blade 23 carries out face contact advance and retreat simultaneously in the blade groove 28 of swing lining 27, and this swing lining 27 carries out the face contact and swings simultaneously at the disconnection position of annular piston 22.Thus, connected element 27 is contacted with annular piston 22 with blade 23 reliable ground, can reduce to act on the load of the average unit area of this contact position in addition reliably.

The 3rd invention is characterized in that in the rotary type fluid machine of second invention diameter dimension of the circular-arc outer circumferential face of swing lining 27 is greater than the wall thickness dimension of annular piston 22.In this case, so-called " wall thickness dimension of annular piston 22 " is meant radius size poor of the radius size of outer circumferential face of annular piston 22 and inner peripheral surface.

At this, be positioned at Fig. 4 (A) of bottom dead center position and be positioned at shown in Fig. 4 (B) of top dead center position as annular piston 22, if the diameter dimension D of swing lining 27 equates with the wall thickness dimension T of annular piston 22, then, notch 22a need be set on annular piston 22 in order not hinder the action (with reference to the imaginary line of Fig. 4 (A)) of carrying out the blade 23 of off-centre when rotatablely moving at annular piston 22.In this case, become invalid volume Ds among the above-mentioned notch 22a, even finish as the compression stroke among hyperbaric chamber C1-Hp, the C2-Hp of first Room, pressurized gas are not discharged yet and are remained among the above-mentioned notch 22a.Its result, remain among this invalid volume Ds pressurized gas the beginning below suction stroke the time bleed as low pressure chamber C1-Lp, the C2-Lp of second Room in and reexpand, thereby cause decrease in efficiency.

On the other hand, in above-mentioned the 3rd invention, be positioned at Fig. 5 (A) of bottom dead center position and be positioned at shown in Fig. 5 (B) of top dead center position as annular piston 22, make the wall thickness dimension T of the diameter dimension D of swing lining 27, therefore only just can reduce invalid volume Ds by on swing lining 27, chamfered section 27a being set greater than annular piston 22.

The 4th invention is characterized in that in the rotary type fluid machine of second invention, the oscillation center of swing lining 27 to than the center of the wall thickness of annular piston 22 more by the displacement of radially inner side.

At this, be positioned at Fig. 6 (A) of bottom dead center position and be positioned at shown in Fig. 6 (B) of top dead center position as annular piston 22, the center of swinging lining 27 is consistent with the center of the wall thickness of annular piston 22 when making, and when using the swing lining 27 of the symmetric form that has identical chamfered section 27a in both sides, produce invalid volume Ds in the inboard of annular piston 22, expansion-loss becomes problem again.Conversely speaking, if under the center situation consistent that makes swing lining 27, reduce expansion-loss again, then need the swing lining 27 of the asymmetrical shape that assembling work bothers with the center of the wall thickness of annular piston 22.

Relative therewith, in the 4th invention, be positioned at Fig. 7 (A) of bottom dead center position and be positioned at shown in Fig. 7 (B) of top dead center position as annular piston 22, the middle mind-set of swing lining 27 is more leaned on the displacement of radially inner side than the center of the wall thickness of annular piston 22, even therefore under the situation of the swing lining 27 that uses symmetric form, can not produce invalid volume Ds yet, thereby can reduce expansion-loss more simply.

In the rotary type fluid machine of arbitrary invention of the 5th invention in first to fourth invention, it is characterized in that annular piston 22 is fixed on the housing 10, on the other hand, cylinder 21 is connected on the driving mechanism 30.

In the 5th invention, the cylinder 21 with the C1 of cylinder chamber, C2 becomes movable side, and the annular piston 22 in the C1 of cylinder chamber, the C2 becomes fixed side.Therefore, advance and retreat on one side with respect to annular piston 22 swings that the position is fixed by connected element 27 on one side with cylinder 21 incorporate blades 23, thereby carry out the action of eccentric rotary-type piston mechanism 20.When this moved, same with above-mentioned each invention, connected element 27 carried out face with annular piston 22 with blade 23 and contacts.

In the rotary type fluid machine of arbitrary invention of the 6th invention in first to fourth invention, it is characterized in that cylinder 21 is fixed on the housing 10, on the other hand, annular piston 22 is connected on the driving mechanism 30.

In the 6th invention, the cylinder 21 with the C1 of cylinder chamber, C2 becomes fixed side, and the annular piston 22 in the C1 of cylinder chamber, the C2 becomes movable side.Therefore, annular piston 22 on one side by connected element 27 with respect to and blade 23 swings that position be fixed integrated advance and retreat on one side with cylinder 21, thereby carry out the action of eccentric rotary-type piston mechanism 20.When this moved, same with above-mentioned each invention, connected element 27 carried out face with annular piston 22 with blade 23 and contacts.

In the rotary type fluid machine of arbitrary invention of the 7th invention in first to fourth invention, it is characterized in that cylinder 21 possesses: the outside cylinder 24 and the inboard cylinder 25 that form the C1 of cylinder chamber, C2; And the end plate 26 that is connected with the axial end portion of outside cylinder 24 and inboard cylinder 25, outside cylinder 24, inboard cylinder 25 and end plate 26 are integrated.

In the 7th invention, owing to use outside cylinder 24 and inboard cylinder 25 to pass through end plate 26 and incorporate cylinder 21, so the intensity enhancing of cylinder 21.

The 8th invention is characterized in that in the rotary type fluid machine of the 7th invention described rotary type fluid machine possesses the end face that dwindles annular piston 22 and the compliant mechanism 29 of the axial clearance between the end plate 26.

In the 8th invention,, can reduce this gap by above-mentioned compliant mechanism 29 because of the high-pressure of the gas in the C1 of cylinder chamber, the C2 may produce axial clearance between the end face of annular piston 22 and end plate 26.Therefore, gas is difficult for leaking from this axial clearance.

In the rotary type fluid machine of arbitrary invention of the 9th invention in first to fourth invention, it is characterized in that cylinder 21 possesses outside cylinder 24 and the inboard cylinder 25 that forms the C1 of cylinder chamber, C2, outside cylinder 24, inboard cylinder 25 and blade 23 are integrated.

In the 9th invention, owing to use outside cylinder 24 and inboard cylinder 25 to pass through blade 23 and incorporate cylinder, so can simplify the structure of cylinder 21.

In the rotary type fluid machine of arbitrary invention of the tenth invention in first to fourth invention, it is characterized in that, driving mechanism 30 possesses motor 30 and the live axle 33 that is connected with this motor 30, above-mentioned live axle 33 possesses the eccentric part 33a from rotating center off-centre, this eccentric part 33a is connected with cylinder 21 or annular piston 22, and the axial two side portions of the eccentric part 33a of above-mentioned live axle 33 remains on the housing 10 by the 16a of bearing portion, 17a.

In the tenth invention, the eccentric part 33a and the cylinder 21 that drive the live axle 33 of eccentric rotary-type piston mechanism 20 are connected with movable side in the annular piston 22, the axial two side portions of eccentric part 33a remains on state on the housing 10 by the 16a of bearing portion, 17a under, live axle 33 is rotated, so action that should the rotary-type piston mechanism 20 of off-centre is stable.

In the rotary type fluid machine of arbitrary invention of the 11 invention in first to fourth invention, it is characterized in that the suction angle at the end of the inboard C2 of cylinder chamber that is formed on the C1 of outside cylinder chamber in the outside of annular piston 22 and the inboard that is formed on this annular piston 22 is different.At this, so-called " suction angle at the end " is meant the angle of the annular piston 22 (perhaps cylinder 21) that suction stroke finishes in the C1 of cylinder chamber, C2, in other words, is the angle that compression stroke begins.

In addition, the 12 invention is characterized in that the suction angle at the end of the C1 of outside cylinder chamber is greater than the suction angle at the end of the inboard C2 of cylinder chamber in the rotary type fluid machine of the 11 invention.

In these the 11, the 12 inventions, by making the outside C1 of cylinder chamber different with the suction angle at the end of the inboard C2 of cylinder chamber, particularly make the suction angle at the end of the suction angle at the end of the outside C1 of cylinder chamber greater than the inboard C2 of cylinder chamber, the minimum cylinder volume of C1 of cylinder chamber and the inboard C2 of cylinder chamber is poor outside can reducing.Under the bigger situation of the difference of this minimum cylinder volume, because the amplitude of the cogging among the C1 of outside cylinder chamber and the amplitude of the cogging among the C2 of outside cylinder chamber is poor, and might produce some vibrations, but in the 11, the 12 invention, the difference of the amplitude of the cogging among the C1 of cylinder chamber of the outside and the amplitude of the cogging among the C2 of outside cylinder chamber reduces, and makes the action of mechanism 20 stable thus.

In the rotary type fluid machine of arbitrary invention of the 13 invention in first to fourth invention, it is characterized in that, be provided with adiabatic space S3 in the periphery of the rotary-type piston mechanism 20 of off-centre.Here said adiabatic space S3 for example is the space that low-pressure gas is detained.

In the 13 invention, for example be under the situation of compressing mechanism 20 at the rotary-type piston mechanism 20 of off-centre, can make the heat of the high-pressure space S2 in the housing 10 be difficult for being passed to the low pressure refrigerant that is drawn in this compressing mechanism 20.

In the rotary type fluid machine of arbitrary invention of the 14 invention in the first to the 13 invention, it is characterized in that eccentric rotary-type piston mechanism 20 is to suck the also compressing mechanism of pressurized gas.

In the 14 invention, under the situation of the rotary-type piston mechanism 20 of off-centre, can prevent the wearing and tearing and the sintering of decline, annular piston 22 and the blade 23 of the compression efficiency that gas leakage causes as compressing mechanism 20.

The 15 invention is in the rotary type fluid machine of the 14 invention, it is characterized in that, driving mechanism 30 is made of the motor of drive compression mechanism 20, housing 10 constitutes takes in above-mentioned compressor structure 20 and motor 30, is formed with in above-mentioned housing 10: the low-voltage space S1 that is communicated with the suction side of compressing mechanism 20; With the high-pressure space S2 that is communicated with the discharge side of this compressing mechanism 20, above-mentioned motor 30 is disposed at above-mentioned low-voltage space S1.

In the 15 invention, behind the low-voltage space S1 in sucking gas inflow housing 10, be inhaled in the compressing mechanism 20.Be drawn into gas in the compressing mechanism 20 by 20 compressions of this compressing mechanism and become high pressure, among the high-pressure space S2 during flowing out to housing 10 after, from housing 10 discharges.In this invention because motor 30 is disposed at low-voltage space S1, so suck gas stream cross motor 30 around.

The effect of invention

According to above-mentioned first invention, when the rotary-type piston mechanism 20 of off-centre moves, because connected element 27 utilizes slip surface P1, P2 to carry out face in fact with annular piston 22 and blade 23 to contact, so can reduce to act on the load of the average unit area of this contact position.Therefore, when blade 23 and annular piston 22 slide by connected element 27 in the running, the not easy to wear or sintering of contacting part.In addition, connected element 27 utilizes slip surface P1, P2 to carry out face with annular piston 22 with blade 23 and contacts, and can prevent also that thus gas from leaking between the first Room C1-Hp, C2-Hp and the second Room C1-Lp, C2-Lp.

In addition, according to this first invention, if blade 23 and cylinder 21 are made as one, then also have such advantage, that is, when the rotary-type piston mechanism 20 of off-centre moves, be difficult for the unusual concentrated load of effect, concentrate thereby be difficult for producing stress, therefore can improve the reliability of mechanism.

According to above-mentioned second invention, owing to use swing lining 27 as connected element 27, this swing lining 27 has: above-mentioned blade 23 is held in the blade groove 28 that can advance and retreat; Remain in the circular-arc outer circumferential face at disconnection position of above-mentioned annular piston 22 freely with swing, thus the gas leakage can prevent to turn round reliably the time, the wearing and tearing and the sintering of parts, and can prevent that the structure of joint from complicating.Therefore, can also prevent that the maximization of locking mechanism and cost increase.

According to above-mentioned the 3rd invention, the diameter dimension D of the circular-arc outer circumferential face by making swing lining 27 is greater than the wall thickness dimension T of annular piston 22, thereby only just can reduce invalid volume Ds by on swing lining 27, chamfered section 27a being set, so can be, thereby improve the efficient of running with the expansion-loss again of simple structure decrease under the situation that the rotary-type piston mechanism 20 of off-centre is compressing mechanisms.Therefore, according to the 3rd invention, in second invention that annular piston 22 and blade 23 is coupled together by swing lining 27, swing lining 27 can form structure excellent especially aspect the efficient of the rotary-type piston mechanism 20 of off-centre.

According to above-mentioned the 4th invention, oscillation center by making swing lining 27 to than the center of the wall thickness of annular piston 22 more by the displacement of radially inner side, even thereby under the situation of the swing lining 27 that uses symmetric form, also can reduce expansion-loss again, institute is so that the efficient raising of running.Therefore, same with the 3rd invention according to the 4th invention, in second invention that annular piston 22 and blade 23 is coupled together by swing lining 27, swing lining 27 can form structure excellent especially aspect the efficient of the rotary-type piston mechanism 20 of off-centre.

In addition, in order to reduce expansion-loss again, can use the swing lining 27 of symmetric form and do not use the swing lining 27 of asymmetrical shape, so also can avoid the mistake assembling of mechanism.

According to above-mentioned the 5th invention, be that movable side, annular piston 22 are that connected element 27 contacts with 23 in annular piston 22 and blade in the structure of fixed side at cylinder 21, cylinder 22 moves with respect to annular piston 22 simultaneously.Therefore, in the movable structure of cylinder 21, can prevent the wearing and tearing and the sintering of gas leakage, parts.

According to above-mentioned the 6th invention, be fixed side at cylinder 21, annular piston 22 is in the structure of movable side, and connected element 27 contacts with 23 in annular piston 22 and blade, and annular piston 22 moves with respect to cylinder 21 simultaneously.Therefore, in the movable structure of annular piston 22, can prevent the wearing and tearing and the sintering of gas leakage, parts.

According to above-mentioned the 7th invention, owing to use outside cylinder 24 and inboard cylinder 25 to pass through end plate 26 and incorporate cylinder 21, so the intensity enhancing of cylinder 21.Therefore has the advantage of the high-intensity mechanism 20 of easy design.

According to above-mentioned the 8th invention, dwindle compliant mechanism 29 by setting, thereby make gas be difficult for leaking from this axial clearance in issuable axial clearance between the end face of annular piston 22 and the end plate 26, so can the high running of implementation efficiency.

According to above-mentioned the 9th invention, owing to use outside cylinder 24 and inboard cylinder 25 to pass through blade 23 and incorporate cylinder, so can simplify the structure of cylinder 21.Therefore can carry out compact design.

According to above-mentioned the tenth invention, the eccentric part 33a of the live axle 33 that the rotary-type piston mechanism 20 of off-centre is driven and cylinder 21 are connected with movable side in the annular piston 22, the axial two side portions of eccentric part 33a remains on state on the housing 10 by the 16a of bearing portion, 17a under, live axle 33 is rotated, make the action of the rotary-type piston mechanism 20 of this off-centre stable thus, thereby improve the reliability of mechanism 20.

According to above-mentioned the 11 invention owing to make the outside C1 of cylinder chamber different with the suction angle at the end of the inboard C2 of cylinder chamber, so can be in the C1 of outside cylinder chamber and the inboard C2 of cylinder chamber the ratio of adjusting minimum cylinder volume.

According to above-mentioned the 12 invention, suction angle at the end by making the outside C1 of cylinder chamber is greater than the suction angle at the end of the inboard C2 of cylinder chamber, the minimum cylinder volume of C1 of cylinder chamber and the inboard C2 of cylinder chamber is poor outside can reducing, so the amplitude of the cogging outside can reducing among the C1 of cylinder chamber and the amplitude of the cogging among the C2 of outside cylinder chamber is poor, make the action of mechanism 20 stable thus.

According to above-mentioned the 13 invention, by periphery adiabatic space S3 is set at the rotary-type piston mechanism 20 of off-centre, at the rotary-type piston mechanism 20 of off-centre for example is under the situation of compressing mechanism 20, can make the heat of the high-pressure space S2 in the housing 10 be difficult for being passed to the low pressure refrigerant that is drawn in this compressing mechanism 20, therefore can prevent to cause performance to reduce because of sucking thermal loss.

According to above-mentioned the 14 invention, under the situation of the rotary-type piston mechanism 20 of off-centre, can prevent the wearing and tearing and the sintering of decline, annular piston 22 and the blade 23 of the compression efficiency that gas leakage causes reliably as compressing mechanism.

According to above-mentioned the 15 invention, in housing 10, be formed with: the low-voltage space S1 that is communicated with the suction side of compressing mechanism 20; With the high-pressure space S2 that is communicated with the discharge side of this compressing mechanism 20, above-mentioned motor 30 is disposed at above-mentioned low-voltage space S1.

At this, in the past, the space in housing became in the compressor of so-called high pressure dome (dome) shape of high pressure, when big capacity compressor commercialization, thus the problem that exists motor performance deficiency reliability to reduce.Its reason is, if the external diameter of motor is D, axial length is L, because the output and the D2 * L of motor are proportional, the surface area of motor is general proportional with D * L, thus if improve output, then with respect to the output heating value of increase pro rata, area of heat transfer (surface area) reduces, thereby causes cooling not enough.

On the other hand, also motor configurations can be cooled off by low-pressure gas in low-voltage space, if but only with motor configurations in low-voltage space, then owing to gas refrigerant is directly discharged to the outside of compressor from compressing mechanism, so discharge under the state of the oil droplet that in not separating discharge gas, is contained.In addition, there is such problem, that is, the efficient of heat exchanger reduced, perhaps oil separator need be set in addition for fear of the increase of the circulating load of oil by increasing the circulating load of oil in refrigerant circuit.

Relative therewith, in above-mentioned the 15 invention, in housing 10, be formed with: the low-voltage space S1 that is communicated with the suction side of compressing mechanism 20; With the high-pressure space S2 that is communicated with the discharge side of this compressing mechanism 20, above-mentioned motor 30 is disposed at above-mentioned low-voltage space S1, make thus the suction gas stream that sucks in the compressing mechanism 30 cross motor 30 around, so at this moment can cool off efficiently to motor 30.In addition, because the high-pressure space S2 that is communicated with the discharge side of compressing mechanism 20 is set, become the structure that discharge gases such as refrigeration agent are discharged by this high-pressure space S2 from compressing mechanism 20 in housing.Therefore, just discharge the back from compressing mechanism 20 and contain a large amount of lubricant oil even discharge gas, lubricant oil also can be separated in high-pressure space S2.Therefore, the lubricant oil from the discharge gas that compressor 1 is discharged is separated, so can reduce the circulating load of the oil in the refrigerant circuit, also can eliminate the low on fuel of compressor 1, and also not need oil separator for the low on fuel of eliminating compressor 1.

Description of drawings

Fig. 1 is the sectional arrangement drawing of the rotary compressor of embodiments of the present invention one.

Fig. 2 is the drawing in side sectional elevation of the action of expression compressing mechanism.

Fig. 3 is the sectional arrangement drawing of rotary compressor of first variation of mode of execution one.

Fig. 4 is the structural drawing of comparative example of swing lining of second variation of mode of execution one.

Fig. 5 is the structural drawing of swing lining of second variation of mode of execution one.

Fig. 6 is the structural drawing of comparative example of swing lining of the 3rd variation of mode of execution one.

Fig. 7 is the structural drawing of swing lining of the 3rd variation of mode of execution one.

Fig. 8 is the sectional arrangement drawing of the rotary compressor of mode of execution two.

Fig. 9 is the sectional arrangement drawing of the rotary compressor of mode of execution three.

Figure 10 is the sectional arrangement drawing of the rotary compressor of mode of execution four.

Figure 11 is the drawing in side sectional elevation of compressing mechanism of the rotary compressor of expression mode of execution five.

Figure 12 is the sectional arrangement drawing of the rotary compressor of mode of execution six.

Figure 13 is the sectional arrangement drawing of the rotary compressor of mode of execution seven.

Figure 14 is the structural drawing of the variation of expression swing lining.

Figure 15 is the structural drawing of other variation of expression swing lining.

Figure 16 is the partial longitudinal section of the rotary compressor of prior art.

Figure 17 is the sectional drawing along the XVII-XVII line of Figure 16.

Figure 18 is the sectional drawing of the variation of expression Figure 17.

Symbol description

1 compressor; 10 housings; 16 upper cases; 17 lower cases; 16a bearing portion; 17a bearing portion; 20 compressing mechanisms (eccentric rotary-type piston mechanism); 21 cylinders; 22 annular pistons; 23 blades; 24 outside cylinders; 25 inboard cylinders; 26 end plates; 27 swing linings (connected element); 27A discharges the side lining; 27B suction side lining; 28 blade grooves; 29 seal rings (compliant mechanism); 30 motor (driving mechanism); 33 live axles; The 33a eccentric part; C1 cylinder chamber (outside cylinder chamber); C2 cylinder chamber (inboard cylinder chamber); C1-Hp hyperbaric chamber (first Room, pressing chamber); C2-Hp hyperbaric chamber (first Room, pressing chamber); C1-Lp low pressure chamber (second Room, suction chamber); C2-Lp low pressure chamber (second Room, suction chamber); P1 first slip surface; P2 second slip surface; The S3 adiabatic space.

Embodiment

Below, with reference to the accompanying drawings embodiments of the present invention are elaborated.

" working of an invention mode one "

Present embodiment relates to rotary compressor.As shown in Figure 1, this compressor 1 constitutes totally-enclosed type, has taken in compressing mechanism (eccentric rotary-type piston mechanism) 20 and motor (driving mechanism) 30 in the housing 10 of this compressor 1.Above-mentioned compressor 1 for example is used for compressing the refrigeration agent that sucks from vaporizer at the refrigerant circuit of air bells conditioner, then this refrigeration agent is discharged to condenser.

Housing 10 is made of body cylindraceous portion 11, the upper end plate 12 of upper end portion that is fixed on this body portion 11 and the lower end plate 13 that is fixed on the underpart of body portion 11.On upper end plate 12, be provided with the suction pipe 14 that connects this end plate 12, in body portion 11, be provided with the discharge tube 15 of this body portion 11 of perforation.

Above-mentioned compressor structure 20 is formed between the upper case 16 and lower case 17 that is fixed in housing 10.This compressing mechanism 20 has: cylinder 21, and this cylinder 21 has the C1 of cylinder chamber, the C2 of ring-type; Annular piston 22, this annular piston 22 are configured in the C1 of this cylinder chamber, the C2; And blade 23, as shown in Figure 2, this blade 23 is divided into the C1 of cylinder chamber, C2 as hyperbaric chamber (pressing chamber) C1-Hp, the C2-Hp of first Room with as low pressure chamber (suction chamber) C1-Lp, the C2-Lp of second Room.Cylinder 21 and annular piston 22 constitute and relatively carry out off-centre and rotatablely move.In this mode of execution one, the cylinder 21 with the C1 of cylinder chamber, C2 is movable sides, and the annular piston 22 that is configured in the C1 of cylinder chamber, the C2 is fixed side.

Motor 30 possesses stator 31 and rotor 32.Stator 31 is configured in the below of compressing mechanism 20, and is fixed in the body portion 11 of housing 10.Be connected with live axle 33 on rotor 32, this live axle 33 constitutes with rotor 32 rotations.Live axle 33 connects the above-mentioned C1 of cylinder chamber, C2 at above-below direction.

In above-mentioned live axle 33, be provided with the fuel feeding road (omitting diagram) of extending vertically in the inside of this live axle 33.In addition, be provided with oil feed pump 34 in the underpart of live axle 33.And above-mentioned fuel feeding road extends to compressing mechanism 20 upward from this oil feed pump 34.According to this structure, the lubricant oil that will be stored in the bottom in the housing 10 by this oil feed pump 34 is supplied to the slide part of compressing mechanism 20 by above-mentioned fuel feeding road.

On live axle 33, be formed with eccentric part 33a in the part that is arranged in the C1 of cylinder chamber, C2.Eccentric part 33a forms the diameter of diameter greater than the top and the bottom of this eccentric part 33a, and from the eccentric prearranging quatity in the axle center of live axle 33.

Above-mentioned cylinder 21 possesses outside cylinder 24 and inboard cylinder 25.The underpart of outside cylinder 24 and inboard cylinder 25 is coupled together by end plate 26, thereby outside cylinder 24 and inboard cylinder 25 become one.In addition, above-mentioned inboard cylinder 25 is inlaid on the eccentric part 33a of live axle 33 sliding freely.

Above-mentioned annular piston 22 forms as one with upper case 16.In addition, on upper case 16 and lower case 17, be formed with the 16a of bearing portion, the 17a that is used to support above-mentioned live axle 33 respectively.Like this, the compressor 1 of present embodiment becomes following perforation axle construction, that is, above-mentioned live axle 33 connects the above-mentioned C1 of cylinder chamber, C2 at above-below direction, and the axial two side portions of eccentric part 33a remains in housing 10 by the 16a of bearing portion, 17a.

Above-mentioned compressor structure 20 possesses swing lining 27 as the connected element that annular piston 22 and blade 23 are movably coupled together mutually.Annular piston 22 forms the C type shape of the part disconnection of annulus.Above-mentioned blade 23 is fixed in outside cylinder 24 and inboard cylinder 25, and constitute, on the radial line of the C1 of cylinder chamber, C2, the wall (inner peripheral surface of outside cylinder 24) from the wall (outer circumferential face of inboard cylinder 25) of interior all sides of the C1 of cylinder chamber, C2 to outer circumferential side runs through the disconnection position of annular piston 22 and extends.In addition, swing lining 27 utilizes the disconnection position of annular piston 22 that this annular piston 22 is coupled together with blade 23.In addition, as shown in Figure 2, blade 23 can form as one with outside cylinder 24 and inboard cylinder 25, also can be used as independent parts and is installed on two cylinders 24,25.In addition, blade 23 also can be mounted on the length direction of this blade 23 and move.

The inner peripheral surface of outside cylinder 24 and the outer circumferential face of inboard cylinder 25 are the barrel surface that dispose concentrically with respect to one another, are formed with the above-mentioned C1 of cylinder chamber, C2 between them.The diameter of the outer circumferential face of above-mentioned annular piston 22 forms the diameter less than the inner peripheral surface of outside cylinder 24, and the diameter of the inner peripheral surface of above-mentioned annular piston 22 forms the diameter greater than the outer circumferential face of inboard cylinder 25.Thus, between the inner peripheral surface of the outer circumferential face of annular piston 22 and outside cylinder 24, be formed with the outside C1 of cylinder chamber, between the outer circumferential face of the inner peripheral surface of annular piston 22 and inboard cylinder 25, be formed with the inboard C2 of cylinder chamber.

In addition, annular piston 22 and cylinder 21 the inner peripheral surface of the outer circumferential face of annular piston 22 and outside cylinder 24 on one point in fact state of contact (though tightly there is the gap of micron order, but the state that can not have the problem that refrigeration agent leaks from this gap), differ at phase place and this contact on 180 ° the position, the inner peripheral surface of annular piston 22 contacts in fact on one point with the outer circumferential face of inboard cylinder 25.

Above-mentioned swing lining 27 is made of following part: the discharge side lining 27A that is positioned at hyperbaric chamber C1-Hp, C2-Hp side with respect to blade 23; With the suction side lining 27B that is positioned at low pressure chamber C1-Lp, C2-Lp side with respect to blade 23.Discharge side lining 27A and suction side lining 27B and form same shape, their section shape all is roughly semicircle, and discharges side lining 27A and suction side lining 27B disposes in tabular surface mode respect to one another.In addition, the space between the opposing side of two

lining

27A, 27B constitutes blade groove 28.

Blade 23 is inserted in this blade groove 28, the tabular surface (the second slip surface P2: with reference to Fig. 2 (C)) of swing lining 27A, 27B carries out face in fact with blade 23 and contacts, and circular-arc outer circumferential face (the first slip surface P1) carries out face in fact with annular piston 22 and contacts.Swing lining 27A, 27B constitute, and under the state that blade 23 is clipped in the blade groove 28, blade 23 is advanced and retreat in blade groove 28 along the face direction of this blade 23.Simultaneously, swing lining 27A, 27B constitutes and blade 23 integratedly with respect to annular piston 22 swings.Therefore, above-mentioned swing lining 27 constitutes, and above-mentioned blade 23 and annular piston 22 can be oscillation center and swing relatively with this central point of swinging lining 27, and above-mentioned blade 23 can be with respect to the face direction advance and retreat of annular piston 22 at this blade 23.

In addition, though illustrated that in this embodiment two lining 27A, 27B divide the example that is arranged, two lining 27A, 27B also can be at locally-attached integrative-structure.

In above structure, when live axle 33 rotations, in outside cylinder 24 and inboard cylinder 25, blade 23 is advanced and retreat in blade groove 28, and the central point with swing lining 27 is that oscillation center ground is swung simultaneously.By this wobbling action, the point of contact of annular piston 22 and cylinder 21 (A) figure from Fig. 2 moves successively to (D) figure.At this moment, above-mentioned outside cylinder 24 and inboard cylinder 25 still do not carry out rotation around live axle 33 revolution.

On upper case 16, be formed with suction port 41 at the lower position of suction pipe 14.This suction port 41 is crossed over the suction space 42 of the periphery that is formed on outside cylinder 24 and is formed the slotted hole shape from the inboard C2 of cylinder chamber.This suction port 41 is along this upper case 16 of axial perforation of upper case 16, and low pressure chamber C1-Lp, C2-Lp and the suction space 42 of the C1 of cylinder chamber, C2 is communicated with the superjacent air space (low-voltage space S1) of upper case 16.In addition, in outside cylinder 24, be formed with above-mentioned suction space 42 and the through hole 43 that the low pressure chamber C1-Lp of the C1 of outside cylinder chamber is communicated with, in annular piston 22, be formed with the through hole 44 that the low pressure chamber C1-Lp with the C1 of outside cylinder chamber is communicated with the low pressure chamber C2-Lp of the inboard C2 of cylinder chamber.

In addition, for above-mentioned outside cylinder 24 and annular piston 22, the upper end portion at position that can they are corresponding with above-mentioned suction port 41 is carried out chamfering like that and is formed wedge shape shown in the dotted line among Fig. 1.Like this, can carry out the suction of refrigeration agent efficiently to low pressure chamber C1-Lp, C2-Lp.

On upper case 16, be formed with exhaust port 45,46.These

exhaust ports

45,46 are respectively along this upper case 16 of axial perforation of upper case 16.The lower end of exhaust port 45 is with the mode opening towards the hyperbaric chamber C1-Hp of the C1 of outside cylinder chamber, and the lower end of exhaust port 46 is with the mode opening towards the hyperbaric chamber C2-Hp of the inboard C2 of cylinder chamber.On the other hand, the upper end of these

exhaust ports

45,46 is communicated with discharge space 49 by the expulsion valve (needle spring plate valve) 47,48 that opens and closes this

exhaust port

45,46.

This discharge space 49 is formed between upper case 16 and the cover plate 18.Be formed with discharge route 49a in upper case 16 and lower case 17, this discharge route 49a is communicated to the following side space (high-pressure space S2) of lower case 17 from discharge space 49.

On the other hand, on above-mentioned lower case 17, be provided with seal ring 29.Sealing circle 29 is filled among the annular slot 17b of lower case 17, and is crimped on the lower surface of end plate 26 of cylinder 21.In addition, on the surface of contact of cylinder 21 and lower case 17, the lubricant oil of high pressure is imported the radially inner side part of seal ring 29.Such by the above, above-mentioned seal ring 29 constitutes compliant mechanisms, and this compliant mechanism utilizes the pressure of above-mentioned lubricant oil to dwindle axial clearance between the end plate 26 of the lower end surface of annular piston 22 and cylinder 21.

The running action

Below, the running action of this compressor 1 is described.

When starting motor 30, the rotation of rotor 32 is passed to the outside cylinder 24 and the inboard cylinder 25 of compressing mechanism 20 by live axle 33.Like this, blade 23 moves back and forth between swing lining 27A, 27B (advance and retreat action), and blade 23 becomes one, and carries out wobbling action with respect to annular piston 22 with swing lining 27A, 27B.At this moment, swing lining 27A, 27B utilize slip surface P1, P2 to carry out face in fact with annular piston 22 and blade 23 and contact.In addition, outside cylinder 24 and inboard cylinder 25 revolve round the sun in respect to annular piston 22 swings, thus the compressed action that compressing mechanism 20 is scheduled to.

Specifically, in the C1 of outside cylinder chamber, under the state of Fig. 2 (D), the volume of low pressure chamber C1-Lp is almost minimum, live axle 33 from this state to figure right side rotation and to the change of state of Fig. 2 (A), Fig. 2 (B), Fig. 2 (C), thereupon, the volume of this low pressure chamber C1-Lp increases, at this moment, refrigeration agent is inhaled among this low pressure chamber C1-Lp by suction pipe 14, low-voltage space S1 and suction port 41.At this moment, refrigeration agent not only directly is drawn into the low pressure chamber C1-Lp from suction port 41, and the part of this refrigeration agent enters from suction port 41 and suck the space 42, and is inhaled into the low pressure chamber C1-Lp by through hole 43 from sucking space 42.

When becoming the state of Fig. 2 (D) once more when live axle 33 rotations, refrigeration agent finishes to the suction of above-mentioned low pressure chamber C1-Lp.In addition, this low pressure chamber C1-Lp becomes the hyperbaric chamber C1-Hp of compressed refrigerant specifically, and forms new low pressure chamber C1-Lp across blade 23.When live axle 33 continues rotation, in above-mentioned low pressure chamber C1-Lp, carry out the suction of refrigeration agent repeatedly, on the other hand, the volume of hyperbaric chamber C1-Hp reduces, and refrigeration agent is compressed in the C1-Hp of this hyperbaric chamber.When the pressure of hyperbaric chamber C1-Hp reaches predetermined value and reaches setting value with the pressure reduction of discharging space 49, high-pressure refrigerant by this hyperbaric chamber C1-Hp is opened expulsion valve 47, thereby high-pressure refrigerant flows out to high-pressure space S2 by discharge route 49a from discharging space 49.

In the inboard C2 of cylinder chamber, under the state of Fig. 2 (B), the volume of low pressure chamber C2-Lp is almost minimum, live axle 33 from this state to figure right side rotation and to the change of state of Fig. 2 (C), Fig. 2 (D), Fig. 2 (A), thereupon, the volume of this low pressure chamber C2-Lp increases, and at this moment, refrigeration agent is inhaled among this low pressure chamber C2-Lp by suction pipe 14, low-voltage space S1 and suction port 41.At this moment, refrigeration agent not only directly is inhaled into the low pressure chamber C2-Lp from suction port 41, and the part of this refrigeration agent enters from suction port 41 and sucks space 42, and from suck the low pressure chamber C2-Lp that low pressure chamber C1-Lp and the through hole 44 of space 42 by through hole 43, outside cylinder chamber be inhaled into the inboard C2 of cylinder chamber.

When revolving, live axle 33 turns around and when becoming the state of Fig. 2 (B) once more, refrigeration agent finishes to the suction of above-mentioned low pressure chamber C2-Lp.In addition, this low pressure chamber C2-Lp becomes the hyperbaric chamber C2-Hp of compressed refrigerant specifically, and forms new low pressure chamber C2-Lp across blade 23.When live axle 33 continues rotation, in above-mentioned low pressure chamber C2-Lp, carry out the suction of refrigeration agent repeatedly, on the other hand, the volume of hyperbaric chamber C2-Hp reduces, and refrigeration agent is compressed in the C2-Hp of this hyperbaric chamber.When the pressure of hyperbaric chamber C2-Hp reaches predetermined value and reaches setting value with the pressure reduction of discharging space 49, high-pressure refrigerant by this hyperbaric chamber C2-Hp is opened expulsion valve 48, thereby high-pressure refrigerant flows out to high-pressure space S2 by discharge route 49a from discharging space 49.

In C1 of outside cylinder chamber and the inboard C2 of cylinder chamber, be compressed like this and discharge from discharge tube 15, in refrigerant circuit,, be inhaled into once more in the compressor 1 through behind condensation stroke, expansion stroke and the evaporation stroke to the high-pressure refrigerant that high-pressure space S2 flows out.

The effect of mode of execution one

In this mode of execution one, swing lining 27 is set as the connected element that connects annular piston 22 and blade 23, this swing lining 27 constitutes and utilizes slip surface P1, P2 to carry out face in fact with annular piston 22 and blade 23 to contact, so can prevent that annular piston 22 and blade 23 wear and tear in the running, perhaps their contacting part sintering.

In addition, because swing lining 27 is set like this, makes swing lining 27 carry out face with blade 23 and contact, so the sealing of contacting part is also excellent with annular piston 22.Therefore, in C1 of outside cylinder chamber and the inboard C2 of cylinder chamber, can both prevent that refrigeration agent from leaking and making compression efficiency decline from hyperbaric chamber C1-Hp, C2-Hp to low pressure chamber C1-Lp, C2-Lp.

In addition, compressor 1 according to this mode of execution, owing to follow the cogging of the compressed action among the C1 of cylinder chamber of the outside and follow the phase difference of the cogging of the compressed action among the inboard C2 of cylinder chamber to stagger 180 °, so compare with the compressor of single cylinder type, the amplitude of the torque curve of total diminishes.If this amplitude is big then the vibration or the noise of compressor 1 just become problem, but also can prevent such problem in the present embodiment.In addition, owing to be the little structure of noise, so do not need soundproof material yet, thus the effect that reduces cost also had.

In addition, at the overlapping two cylinder type compressors in the past of compressing mechanism secondary (for example, with reference to TOHKEMY 2000-161276 communique) in, complex structure, cost is also high, but in the compressor 1 of this mode of execution, can obtain and the above-mentioned pair of performance that the cylinder machine is identical by two C1 of cylinder chamber, C2 that are located in the compressing mechanism 20, and can simplified structure, can also suppress cost.In addition, in this embodiment, compare, can shorten the span (span) between the bearing,, stablize thereby move so the amount of deflection of live axle reduces with two cylinder machines that the compressing mechanism secondary is overlapping.

In addition, structure according to this mode of execution, producing under the situation of liquid return to compressor 1 because of the variation of operating condition vaporizer from refrigerant circuit, if the high-pressure abnormal ascending of hyperbaric chamber C1-Hp, the C2-Hp of the C1 of cylinder chamber, C2 then is shifted cylinder 21 downwards by seal ring 29 distortion.Thus, liquid refrigerant is leaked, so also can prevent liquid compression to low pressure chamber C1-Lp, C2-Lp from hyperbaric chamber C1-Hp, C2-Hp.Its result, the possibility that compressing mechanism 20 breaks down reduces, thereby reliability is improved.

In addition, according to this mode of execution one, because blade 23 is arranged to one with cylinder 21, and the two ends of blade 23 remain in cylinder 21, so on-stream being difficult for applies unusual concentrated load to blade 23, concentrate thereby be difficult for producing stress.Therefore, slide part is difficult for sustaining damage, and puts from this, and the reliability of mechanism also is improved.

In addition, in the existing structure shown in Figure 14～Figure 16, use cross axle mechanism to make annular piston 22 not stop mechanism from transferring only to carry out eccentric rotation of rotating as being used to, in present embodiment one, by swing lining 27 annular piston 22 and blade 23 being coupled together itself just becomes the rotation of annular piston and stops mechanism, do not need special-purpose rotation to stop mechanism, so can carry out compact design.

The variation of mode of execution one

(first variation)

Fig. 3 represents first variation of mode of execution one.

This variation is not use end plate 26 to constitute the example of cylinder 21.Specifically, cylinder 21 is outside cylinder 24, inboard cylinder 25 and blade 23 incorporate cylinders.In addition, in this embodiment, the seal ring 29 shown in Fig. 1 is not set.

If constitute like this, then can further simplify the structure of cylinder 21, can realize the miniaturization of compressing mechanism 20.

In addition, because other formations, effect are identical with mode of execution one with effect, so the omission specific description.

(second variation)

Second variation is that the diameter dimension D of circular-arc outer circumferential face of swing lining 27 is greater than the example of the wall thickness dimension T of annular piston 22.In this case, so-called " wall thickness dimension of annular piston 22 " is meant radius size poor of the radius size of outer circumferential face of annular piston 22 and inner peripheral surface.

At this, shown in Fig. 4 (B) of this comparative example when as Fig. 4 (A) of the comparative example when representing that annular piston 22 is positioned at bottom dead center position and expression annular piston 22 is positioned at top dead center position, if the diameter dimension D of swing lining 27 is identical with the wall thickness dimension T of annular piston 22, then, notch 22a need be set on annular piston 22 in order not hinder the action (with reference to the imaginary line of Fig. 4 (A)) of carrying out the blade 23 of off-centre when rotatablely moving at annular piston 22.In this case, the space among the above-mentioned notch 22a becomes invalid volume Ds, even the compression stroke among hyperbaric chamber C1-Hp, the C2-Hp finishes, pressurized gas are not discharged yet and remained among the above-mentioned notch 22a.Its result remains among bleed when pressurized gas suction stroke below among this invalid volume Ds begins low pressure chamber C1-Lp, the C2-Lp and reexpands, thereby causes decrease in efficiency.

On the other hand, in this variation, be positioned at Fig. 5 (A) of bottom dead center position and be positioned at shown in Fig. 5 (B) of top dead center position as annular piston 22, make the wall thickness dimension T of the diameter dimension D of swing lining 27, so only just can reduce invalid volume Ds on annular piston 22 by chamfered section 27a is set greater than annular piston 22.Therefore, can reduce eccentric rotary-type piston mechanism 20, thereby improve the efficient of running as the expansion-loss again under the situation of compressing mechanism.

Like this, according to second variation, under situation about annular piston 22 and blade 23 being coupled together by swing lining 27, swing lining 27 can form structure excellent especially aspect the efficient of compressing mechanism 20.

(the 3rd variation)

The 3rd variation be the oscillation center that makes swing lining 27 to than the center of the wall thickness of annular piston 22 more by the example of the displacement of radially inner side.

At this, shown in Fig. 6 (B) of this comparative example when as Fig. 6 (A) of the comparative example when representing that annular piston 22 is positioned at bottom dead center position and expression annular piston 22 is positioned at top dead center position, if make the center of swing lining 27 consistent with the center of the wall thickness of annular piston 22, and use the swing lining 27 that has the symmetric form of identical chamfered section 27a in both sides, then produce invalid volume Ds in the inboard of annular piston 22, expansion-loss becomes problem again.On the contrary, if under the center situation consistent that makes swing lining 27, reduce expansion-loss again, then need only to reduce the swing lining 27 of asymmetrical shape above-mentioned chamfered section 27a, that assembling work bothers of the inboard of annular piston 22 with the center of the wall thickness of annular piston 22.

Relative therewith, in this variation, be positioned at Fig. 7 (A) of bottom dead center position and be positioned at shown in Fig. 7 (B) of top dead center position as annular piston 22, make the middle mind-set of swing lining 27 more lean on the displacement of radially inner side, so even under the situation of the swing lining 27 that uses symmetric form, also can produce invalid volume Ds hardly than the center of the wall thickness of annular piston 22.Thus, can reduce expansion-loss more simply, thereby improve the efficient of running.

Like this, identical with second embodiment according to the 3rd variation, under situation about annular piston 22 and blade 23 being coupled together by swing lining 27, swing lining 27 can form formation excellent especially aspect the efficient of compressing mechanism 20.

In addition, even do not use the swing lining 27 of asymmetrical shape, and the swing lining 27 of use symmetric form also can reduce expansion-loss again, so also can avoid the mistake assembling of mechanism simply.That is, under the situation of the swing lining 27 that uses asymmetrical shape, might because installation towards mistake and miss assembling, but in this embodiment, owing to use the swing lining 27 of object shapes,, also do not need to be used to prevent the operation of the trouble of assembling by mistake so there is not the mistake assembling.

" working of an invention mode two "

Embodiments of the present invention two example different that be compressing mechanisms 20 with the configuration of motor 30 in housing 10 and mode of execution one.

As shown in Figure 8, in this mode of execution two, compressing mechanism 20 is configured in bottom in the housing 10, motor 30 is configured in top.Compressing mechanism 20 is formed between the upper case 16 and lower case 17 of the bottom of being fixed in housing 10, and annular piston 22 forms as one with upper case 16.Outside cylinder 24, inboard cylinder 25 and end plate 26 form as one, and inboard cylinder 25 is entrenched on the eccentric part 33a of live axle 33 sliding freely, thereby cylinder 21 is remained between upper case 16 and the lower case 17.In addition, on upper case 16 and lower case 17, be formed with the 16a of bearing portion, the 17a of supporting driving shaft 33 respectively.

In the body portion 11 of above-mentioned housing 10, be provided with suction pipe 14, on upper end plate 12, be provided with discharge tube 15.In addition, be formed with in upper case 16: suck space 42, this sucks space 42 and is communicated with above-mentioned suction pipe 14 by suction port 41; With suction passage 42a, this suction passage 42a sucks space 42 from this and is communicated with the low pressure chamber C1-Lp of the C1 of outside cylinder chamber and the low pressure chamber C2-Lp of the inboard C2 of cylinder chamber.In addition, suck the through hole 43 that passes through outside cylinder 24 in space 42 and be communicated with, and be communicated with the low pressure chamber C2-Lp of the inboard C2 of cylinder chamber by the through hole 44 of annular piston 22 with the low pressure chamber C1-Lp of the C1 of outside cylinder chamber.

On upper body 16, be provided with the exhaust port 45 of the outside C1 of cylinder chamber and the exhaust port 46 of the inboard C2 of cylinder chamber, expulsion valve 47 is installed on exhaust port 45, expulsion valve 48 is installed on exhaust port 46.

On upper body 16, be provided with the discharge cap (noise reduction parts) that covers these exhaust ports 45,46.Between this discharge cap 50 and upper body 16, be formed with and discharge space 49.The spatial communication of the opening 50a of the central part of this discharge space 49 by being located at discharge cap 50 and the top of this discharge cap 50.

In this mode of execution two, other structures are identical with mode of execution one.Therefore, for the structure except that above-mentioned, omit specific description at this.

In this mode of execution two, also identical with above-mentioned mode of execution one, swing lining 27 is set as the connected elements that connect annular pistons 22 and blade 23, this swing lining 27 constitutes and utilizes slip surface P1, P2 to carry out face in fact with annular piston 22 and blade 23 to contact.Therefore, can prevent that annular piston 22 and blade 23 wear and tear in the running, perhaps their contacting part sintering.

In addition,, swing lining 27 contacts, so also identical on the excellent this point of sealing of contacting part with mode of execution one because carrying out face with annular piston 22 with blade 23.Therefore, in C1 of outside cylinder chamber and the inboard C2 of cylinder chamber, can both prevent that refrigeration agent from leaking and making compression efficiency decline from hyperbaric chamber C1-Hp, C2-Hp to low pressure chamber C1-Lp, C2-Lp.

In addition, can realize low vibrationization and low noiseization and cost reduction by the amplitude of the torque curve that reduces to add up to, and compare with existing pair of cylinder machine, simplification that can implementation structure also prevents liquid compression etc., can obtain the effect identical with mode of execution one.

In addition, in this embodiment, compressing mechanism 20 is configured in bottom in the housing 10, thereby the sliding position that makes mechanism is near oil groove, so also have the advantage that is lubricated easily.

" working of an invention mode three "

Embodiments of the present invention three are the different examples of partial structurtes and the mode of execution one of compressing mechanism 20.

In this mode of execution three, as shown in Figure 9, make the upper and lower relation of compressing mechanism 20 self opposite, and changed suction structure with mode of execution one.Specifically, by with end plate 26 upper end of outside cylinder 24 and inboard cylinder 25 being coupled together and cylinder 21 being constituted one.In addition, annular piston 22 forms as one with lower case 17.Seal ring 29 is filled among the annular slot 16b that is formed at upper case 16, and is crimped on the upper surface of end plate 26 of cylinder 21.

Suction pipe 14 is horizontally set at the body portion 11 of housing 10, is formed with the suction port 41 that is communicated with this suction pipe 14 on lower case 17.In addition, on lower case 17, be formed with: the suction space 42 that is communicated with suction port 41; With suction passage 42a, this suction passage 42a sucks space 42 from this and is communicated with the low pressure chamber C1-Lp of the C1 of outside cylinder chamber and the low pressure chamber C2-Lp of the inboard C2 of cylinder chamber.This suction space 42 is communicated with the low pressure chamber C1-Lp of the C1 of outside cylinder chamber by the through hole 43 of outside cylinder 24, and is communicated with the low pressure chamber C2-Lp of the inboard C2 of cylinder chamber by the through hole 44 of annular piston 22.

Exhaust port

45,46 is located on the lower case 17.In addition, on the exhaust port 45 of the C1 of outside cylinder chamber, expulsion valve 47 is installed, on the exhaust port 46 of the inboard C2 of cylinder chamber, expulsion valve 48 is installed.In addition, be provided with cover plate 18, between this lower case 17 and cover plate 18, be formed with and discharge space 49 at the lower surface of lower case 17.This is discharged space 49 and is communicated with the high-pressure space S2 of the below of compressing mechanism 20 by not shown discharge route.

Other structures are identical with above-mentioned mode of execution one.

In this mode of execution three, identical with the respective embodiments described above, swing lining 27 is set as the connected elements that connect annular pistons 22 and blade 23, this swing lining 27 constitutes and utilizes slip surface P1, P2 to carry out face in fact with annular piston 22 and blade 23 to contact.Therefore, can prevent that annular piston 22 and blade 23 wear and tear in the running, perhaps their contacting part sintering.

In addition,, swing lining 27 contacts, so also identical on the excellent this point of sealing of contacting part with the respective embodiments described above because carrying out face with annular piston 22 with blade 23.Therefore, in C1 of outside cylinder chamber and the inboard C2 of cylinder chamber, can both prevent that refrigeration agent from leaking and making compression efficiency decline from hyperbaric chamber C1-Hp, C2-Hp to low pressure chamber C1-Lp, C2-Lp.

In addition, can realize low vibrationization and low noiseization and cost reduction by the amplitude of the torque curve that reduces to add up to, and compare with existing pair of cylinder machine, simplification that can implementation structure also prevents liquid compression etc., can obtain the effect identical with the respective embodiments described above.

" working of an invention mode four "

With respect in the mode of execution 1～3 annular piston 22 being formed fixed side, cylinder 21 is formed the example of movable side, embodiments of the present invention four are that cylinder 21 is formed fixed side, annular piston 22 formed the example of movable side.

As shown in figure 10, identical with mode of execution one in this mode of execution four, compressing mechanism 20 is configured in the top in the housing 10.Identical with the respective embodiments described above, this compressing mechanism 20 is formed between upper case 16 and the lower case 17.

On the other hand, different with the respective embodiments described above, outside cylinder 24 and inboard cylinder 25 are set on upper case 16.These outside cylinders 24 and inboard cylinders 25 and upper case 16 are integrated and constitute cylinder 21.

Between upper case 16 and lower case 17, maintain annular piston 22.This annular piston 22 is integrated with end plate 26.At axle sleeve (hub) 26a that is provided with on this end plate 26 on the eccentric part 33a that is entrenched in live axle 33 sliding freely.Therefore, in this structure, when live axle 33 rotations, annular piston 22 carries out off-centre and rotatablely moves in the C1 of cylinder chamber, C2.In addition, identical with the respective embodiments described above, blade 23 is integrated with cylinder 21.

Be formed with on upper case 16: the low-voltage space S1 of the top of suction port 41, this suction port 41 compressing mechanism 20 in the housing 10 is communicated with C1 of outside cylinder chamber and the inboard C2 of cylinder chamber; And the exhaust port 46 of the exhaust port 45 of the C1 of outside cylinder chamber and the inboard C2 of cylinder chamber.In addition, between above-mentioned axle sleeve 26a and inboard cylinder 25, be formed with the suction space 42 that is communicated with above-mentioned suction port 41, in inboard cylinder 25, be formed with through hole 44, in annular piston 22, be formed with through hole 43.In addition, can be in the upper end portion of annular piston 22 and inboard cylinder 25, to position shown in dotted line like that the carry out chamfering corresponding with suction port 41.

Above compressing mechanism 20, be provided with cover plate 18, between upper body 16 and cover plate 18, be formed with and discharge space 49.This discharge space is communicated with the high-pressure space S2 of the below of compressing mechanism 20 by the discharge route 49a that is formed at upper case 16 and lower case 17.

In this mode of execution four, also identical with the respective embodiments described above, swing lining 27 is set as the connected elements that connect annular pistons 22 and blade 23, this swing lining 27 constitutes and utilizes slip surface P1, P2 to carry out face in fact with annular piston 22 and blade 23 to contact.Therefore, can prevent that annular piston 22 and blade 23 wear and tear in the running, perhaps their contacting part sintering.

" working of an invention mode five "

Embodiments of the present invention five are at the outside in the outside that is formed at annular piston 22 C1 of cylinder chamber and are formed among the inboard C2 of cylinder chamber of inboard of this annular piston 22, suck the different example of angle at the end.

In this mode of execution five, as suction structure, Fig. 8 and as shown in Figure 9 as already explained, with refrigeration agent from the suction pipe 14 of the body portion 11 that laterally is installed in housing 10 with suck space 42, by the through hole 43 of outside cylinder 24 and the through hole 44 of inboard cylinder 25, be sucked among outside C1 of cylinder chamber and the inboard C2 of cylinder chamber.

In addition, as shown in figure 11, has following structure, promptly, the through hole 43 of outside cylinder 24 is compared with the through hole 44 of inboard cylinder 25, on Zhou Fangxiang, be formed in the wideer scope, and the end position of the suction stroke in the C1 of outside cylinder chamber (initial position of compression stroke) is than slow in the inboard C2 of cylinder chamber.That is, the suction angle at the end of the C2 of outside cylinder chamber is greater than the suction angle at the end of the inboard C1 of cylinder chamber.

If constitute like this, then compare with the respective embodiments described above, can reduce the minimum cylinder volume of the outside C1 of cylinder chamber.Thus, can reduce to be positioned at volume volume poor of minimum cylinder volume and the inboard C2 of cylinder chamber of all sides that are positioned at this annular piston 22 of the C1 of outside cylinder chamber of the outer circumferential side of annular piston 22.Therefore, the amplitude of the cogging of the compressed action outside following among the C1 of cylinder chamber reduces with the difference of the amplitude of the cogging of following the compressed action among the inboard C2 of cylinder chamber, so can make whole cogging become littler than the respective embodiments described above.Therefore, can further improve the advantage of low vibrationization, low noiseization.

In addition, also can obtain other effects identical with the respective embodiments described above.

" working of an invention mode six "

Embodiments of the present invention six are the examples that are provided with adiabatic space S3 in the periphery of compressing mechanism 20.

Specifically, as shown in figure 12, the through hole 43 that is formed at outside cylinder 24 in the above-mentioned mode of execution one (Fig. 1) is not set and is formed at the through hole 44 of annular piston 22, but make the adiabatic space S3 of the space on every side of outside cylinder 24 as low pressure.That is, in this mode of execution six, the suction space 42 that makes mode of execution one is as adiabatic space S3 that low pressure refrigerant was detained and play a role.

Other structures are identical with mode of execution one.

If constitute like this, then the heat of high-pressure space S2 is difficult for being passed to the low pressure refrigerant that sucks in the compressing mechanism 20, therefore can prevent to cause performance to reduce because of sucking thermal loss.

" working of an invention mode seven "

As shown in figure 13, embodiments of the present invention seven are that space with the below of the compressing mechanism 20 of the inside of housing 10 is as low-voltage space S1, with the space of the top of this compressing mechanism 20 example as high-pressure space S2.Below, the difference of main explanation and mode of execution one.

In this compressor 1, the suction pipe 14 in that the body portion 11 of housing 10 is provided with this body portion 11 of perforation is provided with the discharge tube 15 that connects this end plate 12 on upper end plate 12.

In addition, the underpart of above-mentioned live axle 33 is supported by bearing part 19.

About compressing mechanism 20, suction structure, exhaust structure and compliant mechanism are different with mode of execution one.

At first, the suction port of opening in the space (low-voltage space S1) that is formed with on the lower case 17 below compressing mechanism 20 41.In addition, on upper case 16, be formed with: the suction space 42 that is communicated with suction port 41; With suction passage 42a, this suction passage 42a sucks space 42 from this and is communicated with the low pressure chamber C1-Lp of the C1 of outside cylinder chamber and the low pressure chamber C2-Lp of the inboard C2 of cylinder chamber.In outside cylinder 24, be formed with the through hole 43 that above-mentioned suction space 42 is communicated with the low pressure chamber C1-Lp of the C1 of outside cylinder chamber, be formed with the through hole 44 that is communicated with the low pressure chamber C2-Lp of the inboard C2 of cylinder chamber of low pressure chamber C1-Lp that makes the outside C1 of cylinder chamber in annular piston 22, this point is identical with above-mentioned mode of execution one.

In addition, identical with above-mentioned mode of execution one, on upper case 16, be formed with exhaust port 45,46.These

exhaust ports

exhaust port

45,46.

This discharge space 49 is formed between upper case 16 and the cover plate 18.Discharge space 49 above compressing mechanism 20 on Zhou Fangxiang continuous space, and be communicated with the high-pressure space S2 of the top of this cover plate 18 by the opening 18a of cover plate 18.The lower end of above-mentioned discharge tube 15 is opened to this high-pressure space S2.

In above-mentioned annular piston 22, be formed with the piston side high pressure introduction channel 36a that connects from the upper-end surface of this annular piston 22 to the lower end surface, in the end plate 26 of cylinder 21, be formed with the cylinder side high pressure introduction channel 36b that connects from the upper-end surface of this end plate 26 to the lower end surface.Form big footpath by the lower end that makes piston side high pressure introduction channel 36a, and this piston side high pressure introduction channel 36a and cylinder side high pressure introduction channel 36b also are interconnected, thereby the high-pressure in above-mentioned discharge space 49 is directed into the surface of contact of lower case 17 and end plate 26 in the action of compressing mechanism 20.

On lower case 17, be provided with: the inner seal circle 29a that is positioned at the radially inner side of cylinder side high pressure introduction channel 36b; Outside seal ring 29b with the radial outside that is positioned at cylinder side high pressure introduction channel 36b.These seal rings 29a, 29b are filled among annular slot 17b, the 17c of lower case 17.Thus, constitute compliant mechanism, this compliant mechanism utilizes the pressure between two seal ring 29a, the 29b to dwindle the axial clearance that may produce between cylinder 21 and annular piston 22.

The return tube (drainback passage) 37 of up/down perforation upper case 16 and lower case 17 is set on the other hand.This return tube 37 is made of capillary tube.The discharge gas of discharging, contain lubricant oil, but this lubricant oil separates with refrigeration agent in above-mentioned high-pressure space S1, and store upper surface in upper body 16 from compressing mechanism 20.Then, by the pressure reduction between above-mentioned high-pressure space S2 and the low-voltage space S1, make this lubricant oil turn back to the bottom of housing 10 by return tube 37.

In this embodiment, be drawn into refrigeration agent in the low-voltage space S1 of housing 10 from suction pipe 14 by suction port 41 with after sucking space 42, branch into path by suction passage 42a and the path by through

hole

43,44, be inhaled into then among the C1 of cylinder chamber, the C2.After refrigeration agent was compressed in compressing mechanism 20, the opening 18a from discharge space 49 by cover plate 18 flowed out to high-pressure space S2.

Be compressed mechanism's 20 compressions like this and discharge to the outside of housing 10 from discharge tube 15 to the high-pressure refrigerant that high-pressure space S2 flows out then, in refrigerant circuit,, be inhaled into once more in the compressor 1 through after condensation stroke, expansion stroke and the evaporation stroke.In addition, the lubricant oil that is contained from the refrigeration agent that compressing mechanism 20 is discharged separates with refrigeration agent in high-pressure space S2, and splashes into low-voltage space S1 by return tube 37, turns back to the oil groove of the bottom of housing 10 then.

In this embodiment, be low-voltage space S1 owing to make the below of compressing mechanism 20, and motor 30 is configured among this low-voltage space S1, so can utilize low-pressure gas that motor 30 is cooled off effectively.Therefore,, also can suppress the decreased performance of motor 30, so the efficient of running is improved even under the situation that makes compressor 1 high capacity.

In addition, owing to after flowing into high-pressure space S2, discharge, in this high-pressure space S2, can separate and discharge the lubricant oil that is contained in the gas from discharge tube 15 from the discharge gas of compressing mechanism 30.In addition, this lubricant oil is back in the oil groove in the housing 10 by return tube 37.Therefore, can prevent that the circulating load of the oil in the refrigerant circuit from increasing, can prevent the lubricant oil deficiency of the inside of compressor 1 conversely speaking.In addition, do not need special-purpose oil separator to prevent the lubricant oil deficiency of compressor 1.

In addition, form two spaces owing to clip compressing mechanism 20 in housing 10, one as low-voltage space S1, and another is as high-pressure space S2, so can low-voltage space S1 and high-pressure space S2 be set with simple structure.Therefore, can prevent the structure complicated and the maximization of compressor 1.

In addition, owing to below compressing mechanism 20, form low-voltage space S1, above compressing mechanism 20, form high-pressure space S2, so, even when in refrigerant circuit, producing liquid return because of the variation of operating condition, thus since liquid refrigerant be not inhaled in the compressing mechanism 20 and also can not prevent liquid compression.

In other words, structure according to this mode of execution, even producing under the situation of liquid return to compressor 1 because of the variation of operating condition vaporizer from refrigerant circuit, because refrigeration agent temporarily is directed among the low-voltage space S1, so liquid is just separated from the gas herein, thereby can only gas be drawn among the C1 of cylinder chamber, the C2.Therefore, compressor 1 has the function of accumulator (accumulator), so do not need to be provided with in addition the structural element of accumulator as refrigerant circuit.

" other mode of executions "

The present invention also can have following structure about above-mentioned mode of execution.

For example, can constitute swing lining 27A, 27B as shown in Figure 14.In this embodiment, discharge side lining 27A and form width dimensions different shape mutually with suction side lining 27B.Specifically, (radius R 1 of the circular-arc outer circumferential face of discharge side lining 27A and the radius R 2 of the circular-arc outer circumferential face of suction side lining 27B are identical sizes) departed from respect to the middle mind-set suction side of blade 23 in the center of the circular-arc outer circumferential face of swing lining 27A, 27B, and the width of suction side lining 27B forms greater than the width of discharging side lining 27A.This is based on following reason.

At first, all be low-voltage space all the time as the low pressure chamber C1-Lp of the C1 of outside cylinder chamber of the surrounding space of suction side lining 27B and the low pressure chamber C2-Lp of the inboard C2 of cylinder chamber, between two space C1-Lp and C2-Lp, produce pressure difference hardly.On the other hand, pressure as the hyperbaric chamber C2-Hp of the hyperbaric chamber C1-Hp of the C1 of outside cylinder chamber of the surrounding space of discharging side lining 27A and the inboard C2 of cylinder chamber all changes to high pressure from low pressure, so produce sizable pressure difference between two space C1-Hp and C2-Hp.Therefore, high pressure side lining 27A is subjected to the pressure up or down among the figure, and thus, effect has load on the circular-arc surface of contact of this high pressure side lining 27A and annular piston 22.Therefore, under the bigger situation of high pressure side lining 27A, the load of above-mentioned surface of contact is bigger, but in this embodiment, because the width of high pressure side lining 27A is less, so can suppress the load of this surface of contact.

In addition, can constitute swing lining 27A, 27B as shown in Figure 15.In this embodiment, the center of blade 23 is consistent with the center of the circular-arc outer circumferential face of swing lining 27A, 27B, but the radius R 1 of circular-arc outer circumferential face of discharging side lining 27A is different with the radius R 2 of the circular-arc outer circumferential face of suction side lining 27B.That is, the radius R 2 of the circular-arc outer circumferential face by making suction side lining 27B is greater than the radius R 1 of the circular-arc outer circumferential face of discharging side lining 27A, thereby the width that makes suction side lining 27B is greater than the width of discharging side lining 27A.Like this, since same as described above, can the load of inhibitory action on the circular-arc surface of contact of high pressure side lining 27A and annular piston 22.

On the other hand, in the respective embodiments described above, the C type shape that disconnects in a part that annular piston 22 is formed annulus also runs through in the structure at this disconnection position blade 23, by swing lining 27 annular piston 22 and blade 23 are coupled together, but on the contrary, also can be in annular piston 22 being formed annulus, blade 23 being split up into two structure, annular piston 22 and blade 23 are movably coupled together mutually, and make annular piston 22 carry out face at this connection part to contact with blade 23.In this case, at the position of carrying out the face contact, also be difficult for producing wearing and tearing, sintering and gas leakage.

In addition, in the respective embodiments described above, blade 23 is configured to be positioned on the radial line of the C1 of cylinder chamber, C2, but blade 23 also can be configured to partly tilt with respect to the radial line of the C1 of cylinder chamber, C2.

In addition, in the respective embodiments described above, the situation of compressor as fluid machinery of the present invention has been described, but the present invention also can be applied to gases such as high-pressure refrigerant are imported in the cylinder chamber and produce the decompressor of the driving force of running shaft by the expansion of this gas, also can be applied to pump.

In addition, driving mechanism 30 not necessarily is accommodated in the inside of housing 10, also can compressing mechanism (eccentric rotary-type piston mechanism) 20 be driven from the outside of housing 10.

In addition, above-mentioned mode of execution is preferred illustration in essence, does not limit the scope of the present invention, its application thing or its purposes.

As mentioned above, the present invention is very useful for rotary type fluid machine, this rotary type fluid machine has eccentric rotary-type piston mechanism, the rotary-type piston mechanism of this off-centre constitutes, internal configurations at cylinder 21 the has C1 of cylinder chamber, the C2 of ring-type has the annular piston 22 that the C1 of this cylinder chamber, C2 is divided into outside C1 of cylinder chamber and the inboard C2 of cylinder chamber, and cylinder 21 and annular piston 22 relatively carry out off-centre and rotatablely move, and the C1 of this cylinder chamber, C2 are divided into the first Room C1-Hp, C2-Hp and the second Room C1-Lp, C2-Lp by blade 23 in addition.

Claims

1, a kind of rotary type fluid machine, this rotary type fluid machine possesses:

Eccentric rotary-type piston mechanism (20), the rotary-type piston mechanism of described off-centre (20) has: cylinder (21), this cylinder (21) have the cylinder chamber (C1, C2) of ring-type; Annular piston (22), this annular piston (22) is accommodated in the cylinder chamber (C1, C2) prejudicially with respect to this cylinder (21), and cylinder chamber (C1, C2) is divided into outside cylinder chamber (C1) and inboard cylinder chamber (C2); And blade (23), this blade (23) is configured in the above-mentioned cylinder chamber (C1, C2), and each cylinder chamber (C1, C2) is divided into first Room (C1-Hp, C2-Hp) and second Room (C1-Lp, C2-Lp), and cylinder (21) and annular piston (22) relatively carry out off-centre and rotatablely move;

Drive the driving mechanism (30) of the rotary-type piston mechanism of this off-centre (20); With

Take in the housing (10) of the rotary-type piston mechanism of this off-centre (20);

It is characterized in that,

Above-mentioned blade (23) is located at cylinder (21),

Described rotary type fluid machine possesses connected element (27), and this connected element (27) movably couples together above-mentioned annular piston (22) and blade (23) mutually,

Above-mentioned connected element (27) possesses: with respect to first slip surface (P1) of annular piston (22); With second slip surface (P2) with respect to blade (23).

2, rotary type fluid machine according to claim 1 is characterized in that,

Annular piston (22) forms the C type shape of the part disconnection of annulus,

Blade (23) constitutes, and the wall from the wall of interior all sides of the cylinder chamber (C1, C2) of ring-type to outer circumferential side runs through the disconnection position of annular piston (22) and extends,

Connected element (27) is a swing lining (27), has: above-mentioned blade (23) is held in the blade groove (28) that can advance and retreat; With the circular-arc outer circumferential face of swinging the disconnection position that remains in above-mentioned annular piston (22) freely.

3, rotary type fluid machine according to claim 2 is characterized in that,

The diameter dimension of the circular-arc outer circumferential face of swing lining (27) is greater than the wall thickness dimension of annular piston (22).

4, rotary type fluid machine according to claim 2 is characterized in that,

The oscillation center of swing lining (27) to than the center of the wall thickness of annular piston (22) more by the displacement of radially inner side.

5, rotary type fluid machine according to claim 1 is characterized in that,

Annular piston (22) is fixed on the housing (10), on the other hand,

Cylinder (21) is connected on the driving mechanism (30).

6, rotary type fluid machine according to claim 1 is characterized in that,

Cylinder (21) is fixed on the housing (10), on the other hand,

Annular piston (22) is connected on the driving mechanism (30).

7, rotary type fluid machine according to claim 1 is characterized in that,

Cylinder (21) possesses: the outside cylinder (24) and the inboard cylinder (25) that form cylinder chamber (C1, C2);

And the end plate (26) that is connected with the axial end portion of outside cylinder (24) and inboard cylinder (25),

Outside cylinder (24), inboard cylinder (25) and end plate (26) are integrated.

8, rotary type fluid machine according to claim 7 is characterized in that,

Described rotary type fluid machine possesses the end face that dwindles annular piston (22) and the compliant mechanism (29) of the axial clearance between the end plate (26).

9, rotary type fluid machine according to claim 1 is characterized in that,

Cylinder (21) possesses the outside cylinder (24) and the inboard cylinder (25) of formation cylinder chamber (C1, C2), and outside cylinder (24), inboard cylinder (25) and blade (23) are integrated.

10, rotary type fluid machine according to claim 1 is characterized in that,

Driving mechanism (30) possesses motor (30) and the live axle (33) that is connected with this motor (30),

Above-mentioned live axle (33) possesses the eccentric part (33a) from rotating center off-centre, and this eccentric part (33a) is connected with cylinder (21) or annular piston (22),

The axial two side portions of the eccentric part (33a) of above-mentioned live axle (33) remains on the housing (10) by bearing portion (16a, 17a).

11, rotary type fluid machine according to claim 1 is characterized in that,

The suction angle at the end of inboard cylinder chamber (C2) that is formed on the outside cylinder chamber (C1) in the outside of annular piston (22) and the inboard that is formed on this annular piston (22) is different.

12, rotary type fluid machine according to claim 11 is characterized in that,

The suction angle at the end of outside cylinder chamber (C1) is greater than the suction angle at the end of inboard cylinder chamber (C2).

13, rotary type fluid machine according to claim 1 is characterized in that,

Periphery at the rotary-type piston mechanism of off-centre (20) is provided with adiabatic space (S3).

14, rotary type fluid machine according to claim 1 is characterized in that,

Eccentric rotary-type piston mechanism (20) is to suck the also compressing mechanism of compressed fluid.

15, rotary type fluid machine according to claim 14 is characterized in that,

Driving mechanism (30) is made of the motor of drive compression mechanism (20),

Housing (10) constitutes takes in above-mentioned compressor structure (20) and motor (30),

In above-mentioned housing (10), be formed with: the low-voltage space (S1) that is communicated with the suction side of compressing mechanism (20); The high-pressure space (S2) that is communicated with discharge side with this compressing mechanism (20),

Above-mentioned motor (30) is disposed at above-mentioned low-voltage space (S1).