CN1329658C

CN1329658C - Double-volume compressor

Info

Publication number: CN1329658C
Application number: CNB021291454A
Authority: CN
Inventors: 金钟奉; 金碁柱
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2002-08-19
Filing date: 2002-08-19
Publication date: 2007-08-01
Anticipated expiration: 2022-08-19
Also published as: CN1477308A

Abstract

The present invention relates to a double-volume compressor which comprises a power part, a compression part, a crank pin, an eccentric sleeve barrel and a fixing component, wherein the power part is composed of a motor and a crank shaft inserted into the motor; the compression part is composed of a cylinder, a piston and a connecting rod; the crank pin is positioned on the upper end of the crank shaft and eccentrically formed; the eccentric sleeve barrel has an inner periphery surface and an outer periphery surface, the inner periphery surface of the eccentric sleeve barrel is combined with the outer periphery surface in a rotating mode, the outer periphery surface of the eccentric sleeve barrel is combined with the tail end of the connecting rod in a rotating mode, and the eccentric sleeve barrel is rearranged according to the rotation direction of the motor so as to change the effective offset between the crank pin and the connecting rod; the fixing component is positioned in the crank pin and used for fixing the eccentric sleeve barrel to the crank pin when the motor rotates clockwise or counterclockwise. In the present invention, the crank pin is combined with the eccentric sleeve barrel by the fixing component inserted into the eccentric sleeve barrel so as to prevent the relative motion between the crank pin and the eccentric sleeve; thus, the present invention can reduce the frictional loss and enhance the efficiency of the compressor; in addition, the present invention eliminates the noise generated in the relative rotation process and prolongs the service life of all the components.

Description

Double-volume compressor

Technical field

The present invention relates to a kind of compressor, particularly relate to a kind of double-volume compressor that can change the compressor compresses capacity as required.

Background technique

Double-volume compressor is a kind of sense of rotation according to motor and bent axle, utilizes to link to each other with the crank pin of bent axle and rotatable eccentric adjusting sleeve changes the reciprocal compressor of piston stroke and compression volume.Double-volume compressor can be regulated compression volume according to required payload.Therefore needing many devices of compression working fluid, especially on the household electric appliance of use refrigerating circulation systems such as refrigerator, be widely used.

U. S. Patent the 4th, 236 discloses a kind of double-volume compressor of this spline structure No. 874.Fig. 1 is a prior art double-volume compressor structure transverse sectional view.Fig. 2 is a double-volume compressor working state sketch among Fig. 1.As shown in Figure 1, the critical piece of double-volume compressor comprise the piston 7, bent axle 1 of cylinder 8 inside, with the eccentric crank pin 3 that forms of the center 1a of bent axle 1, be combined in the eccentric hoop 4 on the crank pin 3 and be connected eccentric hoop 4 and the connecting rod 6 of piston 7.Eccentric hoop 4 and connecting rod 6 all are that the center 3a with crank pin 3 is that rotating center is rotated.A certain section is provided with the release areas 9 with certain-length on the surface of contact of crank pin 3 and eccentric hoop 4.Be provided with the pin 5 of connecting crank pin 3 and eccentric hoop 4 in the release areas 9.As shown in Figure 2, along with the different offsets of the state of eccentric hoop 4 will change, therefore with regard to the stroke distances of adjusting piston 7.Need under the big load condition, bent axle 1 is rotated in a clockwise direction, and when needing little load, 1 on bent axle rotates in the counterclockwise direction.A among Fig. 2 represents that piston 7 in the clockwise direction rotation is positioned at the state of upper dead center, B among Fig. 2 represents that piston 7 in the clockwise direction rotation is positioned at the state of lower dead centre, in both cases because of offset reaches maximum, thereby stroke distances Lmax also reaches maximum value.And the C among Fig. 2 represents that piston 7 in the rotation counterclockwise is positioned at the state of lower dead centre, piston 7 was positioned at the state of upper dead center during D among Fig. 2 represented counterclockwise to rotate, in both cases because of offset reaches minimum, so stroke distances Lmin also reaches minimum value.But, in above-mentioned working procedure, when crank pin 3 and eccentric hoop 4 when the center of bent axle 1 1a relatively rotates, on crank pin 3 and eccentric hoop 4 centrifugal action is just arranged, the action of centrifugal force direction is the elongation line between the center of gravity 4a of the center 1a of elongation line between the center 3a of the center 1a of bent axle 1 and crank pin 3 and bent axle 1 and eccentric hoop 4.Because action of centrifugal force direction difference, A, B state among the C among Fig. 2, D state and Fig. 2 will be different.Under C in Fig. 2, the D state, forced direction separately is inconsistent, thereby producing the local moment that perpendicular distance d between the center 3a that size equals the direction of centrifugal force and crank pin 3 multiply by centrifugal force on the eccentric hoop 4, and the action direction of this moment is identical with the sense of rotation of bent axle 1.Because crank pin 3 and eccentric hoop 4 are to be separated from each other and parts in relative rotation, so this moment applies rotating force along the sense of rotation of bent axle 1, pushes from crank pin 3 and eccentric hoop 4 thereby will sell 5.Therefore, as shown in phantom in Figure 3, crank pin 3 and eccentric hoop 4 can move to sense of rotation, and in the clockwise direction in the rotary course, the P of the swelling pressure again through working fluid in the compression process exhaust casing also can promote eccentric hoop 4, make eccentric hoop 4 rotate and cause eccentric hoop 4 and crank pin 3 to relatively rotate to the sense of rotation of bent axle 1, the working procedure of compressor will instability like this, and can not get the desired compression effect.In fact, a fail crank pin 3 and eccentric hoop 4 of pin 5 is completely fixed, and therefore above-mentioned relatively rotating take place thereupon.And when changing the sense of rotation of compressor, pin 5 will roll in release areas 9, therefore shortens owing to the heavy wear on each surface of contact causes its life-span thereupon.

U. S. Patent the 4th, 479 also discloses a kind of double-volume compressor that utilizes crank pin, eccentric cam and pin No. 419.Pin is to be fixed on the eccentric cam, and its track that can form on the crank pin when the compressor sense of rotation changes moves.The situation with No. the 4th, 479,419, above-mentioned U. S. Patent is the same, and pin can not retrain crank pin and eccentric cam fully, therefore relatively rotates thereupon, makes the working procedure instability of compressor, and can not get the desired compression effect.

Summary of the invention

In order to address the above problem, the object of the present invention is to provide a kind of certain offset of also keeping during any direction rotation changing compression volume, thereby double-volume compressor that can stable operation.

In order to achieve the above object, double-volume compressor of the present invention comprises by clockwise rotating the motor that also can rotate counterclockwise and being inserted into the power part that the bent axle on the motor is formed; The press part of forming by piston that is provided with in cylinder, the cylinder and the connecting rod that links to each other with piston; Be arranged in the upper end portion of bent axle and depart from the crank pin that is formed centrally of bent axle; Have with the outer circumferential face of crank pin can rotate the inner peripheral surface that combines and and the end of connecting rod rotate the outer circumferential face of combination, and rearrange according to the sense of rotation of motor, change between crank pin and the connecting rod the effectively eccentric adjusting sleeve of offset thus; Be positioned at crank pin, at motor clockwise direction or the fixed component that counterclockwise eccentric adjusting sleeve and crank pin is completely fixed in the rotation process.

Described crank pin comprises that the fixed component that can place mobile fixed component lays portion.

At crank pin is under the real axis situation, and the shape that fixed component is laid portion is the through hole that the radial direction along real axis type crank pin forms; At crank pin is under the hollow shaft situation, and the shape that fixed component is laid portion is a pair of placed hole that opposite position forms in the crank pin wall body; And the fixed component portion of laying of hollow type crank pin also comprises the groove that extends to the upside end from crank pin wall body institute fixed position.

Described eccentric adjusting sleeve comprises two grooves that radially extend to outer circumferential face from inner peripheral surface respectively, and two grooves are arranged on the elongation line of process crank pin center and eccentric adjusting sleeve center of gravity accordingly.

Integral body was positioned at crank pin when described fixed component was static, and at least a portion is projected into the crank pin outside in the course of the work, and then coincide with eccentric adjusting sleeve; The length of fixed component is less than the diameter of crank pin, and its end surface shape is a kind of in the polygonals such as circular, quadrilateral or Hexagon.

Described fixed component is for being projected into the straight line type pin of crank pin outside along the action of centrifugal force direction in real axis type crank pin.

Described fixed component comprises first protuberance that can be projected into the crank pin outside in the course of the work along the action of centrifugal force direction; In the reverse formation of first protuberance, and be positioned at second protuberance of placed hole in the course of the work all the time; With the length that can limit second protuberance, thereby prevent that second protuberance is projected into the stop component of crank pin outside.

Should be consistent on the described stop component with the inner peripheral surface of crank pin with the surface of contact of crank pin.

Described double-volume compressor also comprises the elastic member that allows outstanding fixed component reset into crank pin inside when work stops.

When using the fixed component of straight line type pin, elastic member is inserted in the groove of eccentric adjusting sleeve, perhaps be inserted on first protuberance of fixed component.

Double-volume compressor of the present invention is to utilize the fixed component that is inserted in the eccentric adjusting sleeve that crank pin and eccentric adjusting sleeve are combined, thereby can prevent the relative movement between crank pin and the eccentric adjusting sleeve, the loss of can not only reducing friction, and the efficient of compressor is improved, and noise that produces when having eliminated relative rotation and the life-span that has prolonged each component parts.The present invention is simple in structure, and assembling is easy, so can enhance productivity.

Description of drawings

Below in conjunction with the drawings and specific embodiments double-volume compressor of the present invention is elaborated.Identical structure is used identical title and identical symbol.

Fig. 1 is a prior art double-volume compressor structure transverse sectional view.

Fig. 2 is a double-volume compressor working state sketch among Fig. 1.

Fig. 3 is the process sketch that relatively rotates between crank pin in the double-volume compressor work of prior art and the eccentric adjusting sleeve.

Fig. 4 is a double-volume compressor structure longitudinal sectional view of the present invention.

Fig. 5 a is a double-volume compressor part-structure longitudinal sectional view in the first embodiment of the invention.

Fig. 5 b is a double-volume compressor part-structure transverse sectional view in the first embodiment of the invention.

Fig. 6 a and Fig. 6 b are part-structure working state transverse sectional view when the bent axle clockwise direction rotates in the first embodiment of the invention.

Fig. 7 a and Fig. 7 b are part-structure working state transverse sectional view when bent axle counterclockwise rotates in the first embodiment of the invention.

Fig. 8 a is a part-structure longitudinal sectional view among double-volume compressor second embodiment of the present invention.

Fig. 8 b is a part-structure transverse sectional view among double-volume compressor second embodiment of the present invention.

Fig. 9 a is a crank pin stereogram among double-volume compressor second embodiment of the present invention.

Fig. 9 b is a crank pin deformation state stereogram among Fig. 9 a.

Figure 10 is the fixed component deformation state transverse sectional view that is arranged in the crank pin.

Figure 11 a and Figure 11 b are part-structure working state transverse sectional view when the bent axle clockwise direction rotates in the second embodiment of the invention.

Figure 12 a and Figure 12 b are part-structure working state transverse sectional view when bent axle counterclockwise rotates in the second embodiment of the invention.

Embodiment

As shown in Figure 4, double-volume compressor of the present invention is divided into the power part 20 that is positioned at the compressor bottom and produces and transmit required drive substantially; Be positioned at the upside of power part 20, and utilize the power that is provided to come the press part 30 of compression working fluid; With can be connected power part 20 and press part 30 and can change the journey variable portion 40 of press part 30 compression volumes in the course of the work.In order to prevent the leakage of refrigerant, parts such as power part 20 and press part 30 all are sealed in the container 11.The inside of container 11 is equipped with the elastic support 12 of a plurality of supporting members.And, also being provided with refrigerant suction pipe 13 and refrigerant discharge tube 15 on the special position of container 11, refrigerant suction pipe 13 and refrigerant discharge tube 15 are with the internal communication of container 11.Power part 20 is arranged on the downside of support 12, and it is by producing rotating force with external power supply and comprising stator 21 and the motor of rotor 22 and bent axle 23 constitute.Motor can rotate in a clockwise direction also and can rotate in a counter-clockwise direction.For the bottom of transmitting power crankshaft 23 is inserted into the inside of rotor 22, and each drive portion that offers compressor for the lubricant oil that the compressor downside is placed is provided with structures such as oilhole or oil groove.Press part 30 is arranged on the support 12 of power part 20 upsides.Press part 30 is to be made of devices such as the suction of the driving component of the mechanical motion for compression refrigerant and auxiliary drive member and expulsion valves.And the cylinder 32 of driving component and formation compression volume also comprises together in order to suck/compression refrigerant and the piston that moves back and forth in the inside of cylinder 32 31 and transmit the connecting rod 33 of to-and-fro motion required drives for piston 31.The valve that constitutes by associated components such as cylinder head 34 and top covers 35 can be cylinder 32 refrigerant is provided and will compress after refrigerant discharge.Journey variable portion 40 is included in the eccentric crank pin that forms in bent axle upper end portion; Be installed between crank pin outer circumferential face and the connecting rod and rotatable eccentric adjusting sleeve; But and the fixed component of relative fixed crank pin and eccentric adjusting sleeve.That is, in the present invention, movably fixed component is installed in the crank pin, and its last branch can be projected into the outside of crank pin because of action of centrifugal force in the course of the work and be inserted in the eccentric adjusting sleeve.When motor rotated clockwise or counterclockwise, respective change can take place in the position of eccentric adjusting sleeve, thereby changes the compression volume of compressor.

Embodiment 1

Fig. 5 a is a double-volume compressor part-structure longitudinal sectional view in the first embodiment of the invention.Fig. 5 b is a double-volume compressor part-structure transverse sectional view in the first embodiment of the invention.Shown in Fig. 5 a, Fig. 5 b, the double-volume compressor in the first embodiment of the invention comprises having the crank pin 110 that fixed component is laid portion 111; Be installed in crank pin 110 outsides, and be provided with the rotatable eccentric adjusting sleeve 120 of a pair of groove 121,122; Be placed on fixed component and lay fixed component 130 in the portion 111.Crank pin 110 is real axis, and its underpart is provided with oil circuit 112 and oil supply hole 113.Fixed component lay portion 111 via the center 110a of real axis type crank pin 110 along extend radially, and then formed the through hole that can place fixed component 130.Simultaneously, move flexibly, should make fixed component lay the slightly larger in diameter of portion 111 in the diameter of fixed component 130 for making fixed component 130.Oil circuit 112 1 ends link to each other with the bent axle 23 outside oil grooves that form, and the other end communicates with oil supply hole 113.In the course of the work, the lubricant oil that is stored in compressor bottom enters into the surface of contact between each parts successively through oil groove and oil circuit 112, thereby can prevent the wearing and tearing between each parts, and compressor is worked more neatly.And, lubricant oil directly can be provided between crank pin 110 and the eccentric adjusting sleeve 120 by oil supply hole 113.And crank pin 110 can make lubricant oil disperse aloft like this, thereby can offer each drive portion equably than eccentric adjusting sleeve 120 height.The inner peripheral surface of eccentric adjusting sleeve 120 is that the outer circumferential face with crank pin 110 is rotatably assorted, and its outer circumferential face then combines with the end of rotating connecting rod 33.The a pair of groove the 121, the 122nd of eccentric adjusting sleeve 120 prolongs certain depth to outer circumferential face along radial direction from inner circumferential surface and forms.That is, via opposite position on the center 110a elongation line of the center of gravity of eccentric adjusting sleeve 120 self and crank pin 110 and be provided with a pair of groove 121,122, that is to say that groove 121,122 correspondences are arranged on the maximum ga(u)ge portion and the minimum thickness portion of eccentric adjusting sleeve 120.So in the course of the work, crank pin 110 can be fixed, therefore can keep correct maximum and minimum offset by groove 121,122 and fixed component 130.The more important thing is that correctly insert for making fixed component 130, groove 121,122 and fixed component are laid portion 111 and will be alignd.Fixed component 130 in the present embodiment has and can be placed on fixed component and lay linear structure in the portion 111.When changing the compressor sense of rotation, in order to change the rotation on every side that offset eccentric adjusting sleeve 120 is centered around crank pin 110.In order not hinder eccentric adjusting sleeve 120 rotations, the length of fixed component 130 is less than the diameter of crank pin 110, and any end of fixed component 130 can not protrude in the outer circumferential face of crank pin 110 when working procedure stopped like this.And in the present invention, the end face of fixed component 130 is circular, and it also can be made into shapes such as quadrilateral or Hexagon, as long as can insert a pair of groove 121,122.Because of having said structure, fixed component 130 is positioned at crank pin 110 when static, then contact in the course of the work with eccentric adjusting sleeve 120, promptly, at least its part is projected into the outside of crank pin 110, thereby and some the contacting in a pair of groove 121,122, and its outstanding length is brought in restriction by the sealing of groove 121,122.And the first embodiment of the present invention also comprises the elastic member 140 that is arranged in a pair of groove 121,122, and these parts can reset into outstanding fixed component 130 inside of crank pin 110 when work stops.

Fig. 6 a and Fig. 6 b are part-structure working state transverse sectional view when the bent axle clockwise direction rotates in the first embodiment of the invention.Fig. 7 a and Fig. 7 b are part-structure working state transverse sectional view when bent axle counterclockwise rotates in the first embodiment of the invention.Shown in Fig. 6 a be the rotation of bent axle 23 beginning clockwise directions the time relative position between fixed component 130 and the eccentric adjusting sleeve 120.When bent axle 23 begins to rotate, eccentric adjusting sleeve 120 between crank pin 110 and the connecting rod 33 is rotation thereupon also, when rotating speed reaches certain value, fixed component 130 just can break away from the constraint of eccentric adjusting sleeve 120 inner peripheral surfaces, then shown in Fig. 6 b, along the action direction of centrifugal force F, promptly move along the elongation line between crankshaft center 23a and the crank pin center 110a.Therefore, fixed component 130 just is inserted in the heavy wall side channel 121, and crank pin 110 and eccentric adjusting sleeve 120 can coincide fully mutually as a result.So, rotate for clockwise direction, the external force P that produces because of expanding again of working fluid after the compression process or other power all are to transmit by connecting rod 33, thereby this fixed component can prevent the relative rotation between crank pin 110 and the eccentric adjusting sleeve 120 effectively, and can also prevent owing to producing the rotation that occurs relative crank pin 110 under the local running torque situation on the eccentric adjusting sleeve 120.Moreover, shown in Fig. 6 b, solid line among the figure is partly represented the upper dead center state, and dotted portion is represented the lower dead centre state, this is the maximum eccentricity amount of eccentric adjusting sleeve 120 under the clockwise direction rotation situation, at this moment, piston moves back and forth with maximum length of stroke Lmax, thereby makes compressor reach the maximum compression capacity.In addition, need a period of time of pausing before bent axle 23 rotation counterclockwise, this moment, elastic force can be bigger than centrifugal force, so elastic member 140 will elastic return, thereby the fixed component that makes fixed component 130 be returned to crank pin 110 is laid in the portion 111.Then, bent axle 23 and the crank pin 110 beginnings rotation counterclockwise that becomes one with it, this moment, eccentric adjusting sleeve 120 will carry out the counter clockwise direction motion between crank pin 110 and connecting rod 33, thereby was arranged in the state shown in Fig. 7 a.Situation when rotating with above-mentioned clockwise direction is identical, when rotating speed reaches certain value, shown in Fig. 7 b, because of the effect fixed component 130 of centrifugal force F will be given prominence to, thereby matches with thin-walled side channel 122.Therefore form the state of fixing by fixed component 130 between crank pin 110 and the eccentric adjusting sleeve 120.Thereby for rotation counterclockwise, even working fluid is to exert pressure P or have other power of piston in compression process, this fixed component can both prevent the relative movement between crank pin 110 and the eccentric adjusting sleeve 120.And this moment shown in Fig. 7 b, counterclockwise eccentric adjusting sleeve 120 will have minimum offset under the rotation situation, thus the compression volume minimum of compressor.

Embodiment 2

Fig. 8 a is a part-structure longitudinal sectional view among double-volume compressor second embodiment of the present invention.Fig. 8 b is a part-structure transverse sectional view among double-volume compressor second embodiment of the present invention.Fig. 9 a is a crank pin stereogram among double-volume compressor second embodiment of the present invention.Fig. 9 b is a crank pin deformation state stereogram among Fig. 9 a.Figure 10 is the fixed component deformation state transverse sectional view that is arranged in the crank pin.As Fig. 8 a, Fig. 8 b, Fig. 9 a, Fig. 9 b and shown in Figure 10, the double-volume compressor in the second embodiment of the invention comprises having the crank pin 210 that fixed component is laid portion 211; Be installed in crank pin 210 outsides, and be provided with the rotatable eccentric adjusting sleeve 220 of a pair of groove 221,222; Be placed on fixed component and lay fixed component 230 in the portion 211.Crank pin 210 parts are hollow shafts, corresponding a pair of placed hole 211a, the 211b of being provided with on its wall body.The bottom of crank pin 210 also is provided with oil circuit 212 and the oil supply hole 213 identical with embodiment 1.Placed

hole

211a, 211b are positioned on the elongation line between crankshaft center 23a and crank pin center 210a, and are positioned at same plane.Thus, two ends can insert respectively fixed component 230 in placed hole 211a, the 211b can be subjected to along himself length direction and act on crankshaft center 23a and crank pin center 210a between the influence of centrifugal force on the elongation line.And fixed component 230 can move in fixed component is laid portion 211.Placed

hole

211a, 211b are the through hole shapes.And shown in Fig. 9 b, at least one is the mounting groove 211d that extends to institute's fixed position from the upper end of crank pin 210 wall bodies among placed hole 211a, the 211b, and fixed component 230 just can easily be put into hollow type crank pin 210 like this.And place fixed component 230 for greater safety, formed the 211c of position portion at the end of mounting groove 211d.Eccentric adjusting sleeve 220 is provided with a pair of groove 221,222 that inserts fixed component 230.Eccentric adjusting sleeve 220 is identical with eccentric adjusting sleeve 120 among the embodiment 1.Shown in Fig. 8 b, fixed component 230 comprises first protuberance 231 that can be projected into crank pin 210 outsides in the course of the work; Be positioned at the reverse extending line of first protuberance 231, and be positioned at second protuberance 232 of crank pin 210 in the course of the work all the time; With the stop component 233 that can limit second protuberance, 232 outstanding length.In fact, in order to be subjected to action of centrifugal force to greatest extent, first protuberance 231 is arranged in the crank pin 210 away from the center 23a of bent axle 23.Comparatively speaking, the center 23a adjacency of second protuberance 232 and bent axle 23.Promptly lay the portion 211 from fixed component under first protuberance 231 centrifugal action that can in rotary course, produce and be projected into the outside, and then be inserted in the groove 221,222 any.Work is that outstanding fixed component 230 is restored when stopping, and on first protuberance 231 elastic member 240 has been installed.In fact elastic member 240 is between stop component 233 and crank pin 210 inwalls.And in order not hinder the rotation of the eccentric adjusting sleeve 220 that can change offset, the outer circumferential face that its end was not projected into crank pin 210 when the length of first protuberance 231 should be arranged to work and stop is for well.In addition, for fixed component 230 is not broken away from from crank pin 210 and the working state of compressor irrelevant, second protuberance 232 is positioned at placed hole 211a all the time.Therefore, stop component 233 can limit the length of second protuberance 232 that is projected into crank pin 210 outsides, and the inwall of elastic member 240 and crank pin 210 together elasticity support to move stop component 233 to the central direction of crank pin 210 thereby can limit second protuberance 232.As shown in figure 10, stop component 233 also can comprise the accommodation section 233b with corresponding to surface of contact 233a of the inner peripheral surface of crank pin 210 and elastic member 240.Surface of contact 233a and accommodation section 233b can make the working stability of fixed component 230.And stop component 233 can also be integrally formed with fixed component 230.

Figure 11 a and Figure 11 b are part-structure working state transverse sectional view when the bent axle clockwise direction rotates in the second embodiment of the invention.Figure 12 a and Figure 12 b are part-structure working state transverse sectional view when bent axle counterclockwise rotates in the second embodiment of the invention.Shown in Figure 11 a, Figure 11 b, Figure 12 a and Figure 12 b, when bent axle 23 beginning clockwise direction rotations, centrifugal force F will act on the fixed component 230.When rotating speed reaches certain value, centrifugal force F will overcome the elastic force of elastic member 240, therefore, eccentric adjusting sleeve 220 is arranged in the state shown in Figure 11 a, first protuberance 231 on the fixed component 230 just can be broken away from the constraint of eccentric adjusting sleeve 220 inner peripheral surfaces, shown in Figure 11 b, be inserted in the heavy wall side channel 221 then.When counterclockwise rotating, shown in Figure 12 a and Figure 12 b, via the rotary course identical with clockwise direction, first protuberance 231 is inserted in the thin-walled side channel 222.In addition, during the conversion sense of rotation, because of elastic force is bigger than centrifugal force, thereby elastic member 240 can be pushed stop component 233 to the inwall of crank pin 210, and the fixed component that makes the protuberance 231 of winning reset into crank pin 210 is laid in the portion 211.Therefore, crank pin 210 and eccentric adjusting sleeve 220 can interfix fully.Therefore, for rotating clockwise or counterclockwise, even working fluid exists for piston applied pressure P or other power in the compression process, compressor of the present invention can both prevent the relative movement between crank pin 210 and the eccentric adjusting sleeve 220, the relative movement in the time of also preventing from simultaneously to produce local running torque in eccentric adjusting sleeve 220 between crank pin 210 and the eccentric adjusting sleeve 220.Can both keep minimum and maximum compression volume under the compressor arbitrary operational state of the present invention like this, and can stably work.

Claims

1, a kind of double-volume compressor comprises by clockwise rotating the motor that also can rotate counterclockwise and being inserted into the power part (20) that the bent axle (23) on the motor is formed; The press part of forming by piston (31) that is provided with in the cylinder (32), cylinder (32) and the connecting rod (33) that links to each other with piston (31) (30); Be positioned at the upper end portion of bent axle (23) and depart from the crank pin (110) that the center (23a) of bent axle (23) forms; Have with the outer circumferential face of crank pin (110) can rotate the inner peripheral surface that combines and and the outer circumferential face of the end rotation combination of connecting rod (33), and rearrange according to the sense of rotation of motor, change between crank pin (110) and the connecting rod (33) the effectively eccentric adjusting sleeve (120) of offset thus; It is characterized in that: described double-volume compressor also comprises and is positioned at crank pin (110), at motor clockwise direction or the fixed component (130) that counterclockwise eccentric adjusting sleeve (120) and crank pin (110) is completely fixed in the rotation process.

2, double-volume compressor according to claim 1 is characterized in that: described crank pin (110) comprises that the fixed component that can place mobile fixed component (130) lays portion (111).

3, double-volume compressor according to claim 2 is characterized in that: at crank pin (110) is under the real axis situation, and the shape that fixed component is laid portion (111) is the through hole that the radial direction along real axis type crank pin (110) forms.

4, double-volume compressor according to claim 2, it is characterized in that: at crank pin (210) is under the hollow shaft situation, and the shape that fixed component is laid portion (211) is a pair of placed hole (211a, 211b) that opposite position forms in crank pin (210) wall body.

5, double-volume compressor according to claim 4 is characterized in that: the fixed component of described hollow type crank pin (210) is laid portion (211) and is also comprised the groove (211d) that extends to the upside end from crank pin (210) wall body institute fixed position.

6, double-volume compressor according to claim 1 is characterized in that: described eccentric adjusting sleeve (220) comprises two grooves (221,222) that radially extend to outer circumferential face from inner peripheral surface respectively.

7, double-volume compressor according to claim 6 is characterized in that: described two grooves (221,222) are arranged on the elongation line of process crank pin (210) center (210a) and eccentric adjusting sleeve (220) center of gravity (220a) accordingly.

8, double-volume compressor according to claim 1, it is characterized in that: integral body was positioned at crank pin (110) when described fixed component (130) was static, and at least a portion is projected into crank pin (110) outside in the course of the work, and then and eccentric adjusting sleeve (120) coincide.

9, double-volume compressor according to claim 8 is characterized in that: the length of described fixed component (130) is less than the diameter of crank pin (110).

10, double-volume compressor according to claim 8 is characterized in that: the end surface shape of described fixed component (130) is a kind of in the polygonals such as circular, quadrilateral or Hexagon.

11, double-volume compressor according to claim 8 is characterized in that: described fixed component (130) is for being projected into the outside straight line type pin of crank pin (110) along the action of centrifugal force direction in real axis type crank pin (110).

12, double-volume compressor according to claim 8 is characterized in that: described fixed component (230) comprises in the course of the work can be projected into outside first protuberance (231) of crank pin (210) along the action of centrifugal force direction; In the reverse formation of first protuberance (231), and be positioned at second protuberance (232) of placed hole (211a) in the course of the work all the time; With the length that can limit second protuberance (232), thereby prevent that second protuberance (232) is projected into the outside stop component (233) of crank pin (210).

13, double-volume compressor according to claim 12 is characterized in that: described stop component (233) upward should be consistent with the inner peripheral surface of crank pin (210) with the surface of contact of crank pin (210).

14, double-volume compressor according to claim 1 is characterized in that: described double-volume compressor also comprises allows outstanding fixed component (230) reset into the inner elastic member (240) of crank pin (210) when work stops.

15, double-volume compressor according to claim 14 is characterized in that: when using the fixed component (130) of straight line type pin, elastic member (140) are inserted in the groove (121,122) of eccentric adjusting sleeve (120).

16, double-volume compressor according to claim 14 is characterized in that: described elastic member (240) is inserted on first protuberance (231) of fixed component (230).