CN103925218A - Cylinder body of double-cylinder compressor and double-cylinder compressor possessing cylinder body - Google Patents

Abstract

The invention provides a cylinder body of a double-cylinder compressor and the double-cylinder compressor possessing the cylinder body. The double-cylinder compressor comprises a cylinder part arranged on the cylinder body, the cylinder part comprises a first cylinder and a second cylinder mutually communicated via a connection part; the first cylinder and the second cylinder are arranged transversely on the cylinder body; one side of the connection part is provided with a first cylinder air suction opening and a second cylinder air suction opening, and the other side of the connection part is provided with a first cylinder air exhausting opening and a second cylinder air exhausting opening. According to the provided double-cylinder compressor cylinder body, two cylinders are arranged on the same cylinder body, the cylinders are communicated with each other via the connection part provided with a slide block groove, the air suction and exhausting openings of the two cylinders are all arranged on the connection part, so that the height of a pump body of the double-cylinder compressor is effectively reduced, and the pump body structure is substantially simplified. Based on the cylinder body with the structure, the assembling precision requirement in industry is reduced and the production efficiency is high. The compressor based on the structure runs stably.

Description

A kind of cylinder body of duplex cylinder compressor and there is its duplex cylinder compressor

Technical field

The present invention relates to compressor field, more particularly, relate to a kind of cylinder body and duplex cylinder compressor of duplex cylinder compressor.

Background technique

Compressor is a kind of pressurized air that is used for, and the machinery that improves gas pressure or carry gas, is widely used in refrigeration industry.

Duplex cylinder compressor is widely used at refrigeration industry greatly because of decrement, it is two-layer up and down that but traditional double cylinder compressor pump body structure is divided into, comprise upper and lower air cylinders and corresponding eccentric part up and down with it, upper lower roller, and the slide plate up and down of separation suction air cavity, traditional double cylinder compressor as described in Figure 1, restriction due to pump body structure, when assembling need to keep upper flange 1 ', upper eccentric part 2 ', upper cylinder 3 ', central diaphragm 5 ', lower eccentric part 6 ', lower cylinder 7 ' and lower flange 8 ' concentricity, pump body structure Complex Assembly technology difficulty is large, and the compressor after assembling is because the upper and lower compressor of pump body structure is stacked, make pump housing height higher, be unfavorable for the miniaturization of compressor and the simplification of structure, to bent axle 4 ' amount of deflection require high.Simultaneously because pump housing height is higher, can not be effectively when compressor low cruise on press part be lubricated, upper press part easily weares and teares, and affects the service life of compressor.

Summary of the invention

In view of this, what the present invention will solve is that volume is large in order to overcome traditional double cylinder compressor complex structure, and assembly precision requires high and assembly technology complicated technical problem, and cylinder body and the duplex cylinder compressor of the duplex cylinder compressor that a kind of volume simple in structure is little is provided.

High in order to solve the pump housing of duplex cylinder compressor, assembling difficulty the invention provides greatly a kind of cylinder body of duplex cylinder compressor, comprises the cylinder portion arranging on described cylinder body, and described cylinder portion comprises the first cylinder and the second cylinder being interconnected by joint; Described the first cylinder and described the second cylinder are laterally arranged on cylinder body; The both sides of described joint offer respectively the first cylinder intakeport, the second cylinder intakeport and the first cylinder exhaust port, the second cylinder exhaust port.

Further, described joint comprises the first joint and the second joint, described the first joint is the cylinder body between the first cylinder upper end and the second cylinder upper end, the second joint is the cylinder body of described the first cylinder lower end and described the second cylinder lower end, the first cylinder intakeport, the second cylinder intakeport are arranged on the second joint, and the first cylinder exhaust port, the second cylinder exhaust port are arranged on the first joint.

Further, in order to simplify housing structure, described the first cylinder intakeport is communicated with described the second cylinder intakeport.

Large in order to solve duplex cylinder compressor volume, assembling difficulty, efficiency of assembling is low, pump body structure is complicated, the problem of fluctuation of service, another aspect of the present invention provides a kind of duplex cylinder compressor, comprises that the described pump housing comprises for holding the housing of the pump housing and motor: fixing upper flange, cylinder body and the lower flange of lamination successively; The cylinder portion being arranged on described cylinder body comprises the first cylinder and the second cylinder being interconnected by joint; Described the first cylinder and described the second cylinder are laterally arranged on cylinder body; The both sides of described joint offer respectively the first cylinder intakeport, the second cylinder intakeport and the first cylinder exhaust port, the second cylinder exhaust port; In described the first cylinder, roller is connected with described motor by bent axle; In described the second cylinder, roller is connected with roller in described the first cylinder by the slide plate being arranged in described joint.

Further, be provided with for holding the slide block slot of slide block on described joint, described slide block is clamped in described slide plate both sides.

Further, in described slide plate and described the first cylinder, in roller and the second cylinder, roller is made into integration.

Further, on the end face of described slide plate, be provided with the grease channel being communicated with the oil supply hole being arranged on described bent axle.

Further, described the first cylinder intakeport is communicated with described the second cylinder intakeport.

Further, described the first cylinder intakeport, the second cylinder intakeport and the first cylinder exhaust port, the second cylinder exhaust port are all arranged on described joint near the edge of slide plate.

Further, in described the second cylinder, roller is hollow cylinder.

Further, take the bent axle center of circle sets up system of coordinates as coordinate center, described bent axle is under motor drives, drive roller in described the first cylinder in the first cylinder, to rotate under the effect of crankshaft eccentric portion, by with described the first cylinder in the fixing described slide plate of roller drive the roller in described the second cylinder to rotate in the second cylinder;

In described the first cylinder, roller center of circle movement locus is:

x＝ecosθ

y＝esinθ

In described the first cylinder, roller cylindrical track is:

x＝(e+r)cosθ

y＝(e+r)sinθ

In described the second cylinder, roller center of circle movement locus is:

$x^{\′}=e\cos \mathrm{\θ}-L(\frac{L}{2}+e\cos \mathrm{\θ})/\mathrm{sqrt}[{(\frac{L}{2}+e\cos \mathrm{\θ})}^2+{\left(e\sin \mathrm{\θ}\right)}^2]$

$y^{\′}=e\sin \mathrm{\θ}-\mathrm{Le}\sin \mathrm{\θ}/\mathrm{sqrt}[{(\frac{L}{2}+e\cos \mathrm{\θ})}^2+{\left(e\sin \mathrm{\θ}\right)}^2]$

In described the second cylinder, roller cylindrical movement locus is:

$x^{\′}=(e+r)\cos \mathrm{\θ}-L(\frac{L}{2}+(e+r)\cos \mathrm{\θ})/\mathrm{sqrt}[{(\frac{L}{2}+e+r)\cos \mathrm{\θ})}^2+{\left((e+r)\sin \mathrm{\θ}\right)}^2]$

$y^{\′}=(e+r)\sin \mathrm{\θ}-L(e+r)\sin \mathrm{\θ}/\mathrm{sqrt}[{(\frac{L}{2}+(e+r)\cos \mathrm{\θ})}^2+{\left((e+r)\sin \mathrm{\θ}\right)}^2]$

In above-mentioned formula: θ is the central angle that in described the first cylinder, roller turns over, the offset that e is described eccentric part, r is roller exradius in the first cylinder, L is the distance between the roller center of circle in the interior roller center of circle of the first cylinder and the second cylinder.

From above-mentioned technological scheme, can find out, duplex cylinder compressor cylinder body provided by the invention, by on the same cylinder body of being arranged on of two cylinder one, each cylinder is communicated with by being provided with the joint of slide block slot, the suction and exhaust ports of each cylinder is all arranged on joint, effectively reduce the height of double cylinder compressor pump body, the structure of the pump housing is simplified greatly.Cylinder body based on this structure, industrially reduces assembly precision requirement, and assembling difficulty is little, and manufacturing efficiency is high.

Duplex cylinder compressor provided by the invention, is arranged on the technological scheme of cylinder body by twin-tub Integral parallel, effectively reduce the height of the pump housing, for the miniaturization of compressor provides larger space.Because cylinder height of the present invention reduces more than at least 60% than traditional compressor, when the compressor slow-speed of revolution, lubricant oil all can each working cylinder of effective supply simultaneously.Two cylinders in the present invention are arranged side by side, and 180 ° of roller phase phase differences in roller and the second cylinder in when operation the first cylinder make in the horizontal direction stressed all the time in state of equilibrium of twin-tub, have reduced thus the vibration in compressor operating.Improved compressor operating stability.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the pump body structure schematic diagram of traditional double cylinder compressor;

Fig. 2 a is the cylinder body plan view of duplex cylinder compressor of the present invention;

Fig. 2 b is the cylinder body stereogram of duplex cylinder compressor of the present invention;

Fig. 3 is the structural front view of duplex cylinder compressor of the present invention;

Fig. 4 is double cylinder compressor pump body structure explosive view of the present invention;

Fig. 5 is the roller structure stereogram of duplex cylinder compressor of the present invention;

Fig. 6 a is the upper flange structural front view of duplex cylinder compressor of the present invention;

Fig. 6 b is the upper flange structural perspective of duplex cylinder compressor of the present invention;

Fig. 7 is the movement locus schematic diagram of duplex cylinder compressor of the present invention during in central angle θ=0 °;

The movement locus schematic diagram that Fig. 8 is duplex cylinder compressor of the present invention when 90 ° of central angle θ >; And

Fig. 9 when adopting crank drive from the force analysis schematic diagram of dynamic air cylinder.

Embodiment

Below in conjunction with accompanying drawing, technological scheme of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment who obtains under creative work prerequisite, belong to the scope of protection of the invention.

Fig. 2 a, 2b shows the upper housing structure that twin-tub of the present invention is arranged on a cylinder body, in order to make the pump body structure of duplex cylinder compressor more simple, solution Pump Body Parts is various, complex structure, assemble difficult technical problem, the cylinder body of duplex cylinder compressor of the present invention comprises the cylinder portion being arranged on described cylinder body 1, and described cylinder portion comprises the first cylinder 2 and the second cylinder 3 being interconnected by joint 50; Different from first, second cylinder stacked of the traditional double rotor compressor pump housing, the first cylinder 2 of the present invention is laterally arranged on cylinder body 1 with described the second cylinder 3; The both sides of described joint 50 offer respectively the first cylinder intakeport 24, the second cylinder intakeport 32 and the first cylinder exhaust port 25, the second cylinder exhaust port 33.The suction and exhaust ports of the first cylinder and the second cylinder is all arranged on joint 50, because joint is the structure of protruding, after the suction and exhaust ports of above-mentioned two cylinders is arranged on such structure, be convenient on the one hand the processing of cylinder body, on the other hand, can effectively reduce exhaust cross gap, can guarantee that compressor is in efficient compressive state.

For can clearer explanation the first cylinder intakeport 24, the second cylinder intakeport 32 and the first cylinder exhaust port 25, the setting position of the second cylinder exhaust port 33 on cylinder body 1 joint 50, described joint 50 comprises the first joint 501 and the second joint 502, described the first joint 501 is the cylinder body between the first cylinder 2 upper ends and the second cylinder 3 upper ends, the second joint 502 is the cylinder body of described the first cylinder 2 lower ends and described the second cylinder 3 lower ends, the first cylinder intakeport 24, the second cylinder intakeport 32 is arranged on the second joint 502, the first cylinder exhaust port 25, the second cylinder exhaust port 33 is arranged on the first joint 501.The noun of locality in above-mentioned cylinder is upper and lower just for the setting on cylinder body 1 of the first joint 501 and the second joint 502 has been described, the change of cylinder body 1 overall viewing angle, causing the above-mentioned noun of locality to be limited with contingent change can not cause improperly and limit this structure.

For cylinder body 1 structure of above-mentioned compressor, described the first cylinder intakeport 24 is communicated with described the second cylinder intakeport 32.Suction port 11 and the first cylinder intakeport 24, the second cylinder intakeport 32 form Y type passage, the gas entering from suction port 11, and the Y shape runner forming via the first cylinder intakeport 24 and the second cylinder intakeport 32 enters compression chamber.The intakeport of above-mentioned connection is further simplified housing structure, owing to need to not offering independently air inlet runner at each cylinder, is not only conducive to the processing of cylinder body, more can guarantee the intensity of cylinder body.

Fig. 3 shows the plan view of double cylinder compressor pump body structure of the present invention, Fig. 4 shows double cylinder compressor pump body structure explosive view of the present invention, large in order to solve duplex cylinder compressor volume, assembling difficulty, efficiency of assembling is low, pump body structure is complicated, the problem of fluctuation of service, another aspect of the present invention provides a kind of duplex cylinder compressor, comprise that housing for holding the pump housing and motor is (because motor is identical with existing compressor with housing, not shown in the drawings at this housing and motor), the described pump housing comprises: the fixing upper flange 8 of lamination successively, cylinder body 1 and lower flange 9, the cylinder portion being arranged on described cylinder body 1 comprises the first cylinder 2 and the second cylinder 3 being interconnected by joint 50, described the first cylinder 2 is laterally arranged on cylinder body 1 with described the second cylinder 3, the both sides of described joint 50 offer respectively the first cylinder intakeport 24, the second cylinder intakeport 32 and the first cylinder exhaust port 25, the second cylinder exhaust port 33, the interior roller 21 of described the first cylinder 2 is connected with described motor by bent axle 23, in described the second cylinder, roller 31 is connected with roller 21 in described the first cylinder by the slide plate 5 being arranged in described joint 50.

Above-mentioned compressor pump body structure, obviously there is the advantage that described duplex cylinder compressor cylinder body has, do not repeat them here with the useful technique effect being brought by above-mentioned cylinder body 1, two-spool compressor in the present invention, slide plate 5 is fixedly connected with described the second cylinder 3 with described the first cylinder 2, in the first cylinder, roller 21 passes through crank-driven, it drives roller 31 motions in the second cylinder as active cylinder by slide plate 5 transferring power, the second cylinder 3 conducts are from dynamic air cylinder, do not need to arrange the transmission of power things such as extra crank or bent axle, in order to illustrate that the present invention passes through the useful technique effect of slide plate transferring power, Fig. 9 shows the force analysis figure that needs additionally to realize by crank-connecting rod transmission of power scheme of the present invention, known by force analysis, by crankshaft-link rod, drive driven cylinder moving, there is certain angle in effectively stressed and moving direction, cause thus power loss larger, and then affect compressor efficiency.Reviewing the present invention adopts slide plate 5 to drive from the i.e. structural drawing of the second cylinder 3 of dynamic air cylinder, due to 180 ° of the phase phase differences at the volley of the first cylinder 2 and the second cylinder 3, be subject to force direction identical with moving direction, the power transmitting by slide plate 5 all acts on the second cylinder 3, power loss is little, and compressor efficiency is naturally high.

The present invention is connected the first cylinder 2 by slide plate 5 with the second cylinder 3, saved the slide plate in traditional compressor, and the slide plate 5 in of the present invention serves as the slide plate of the first cylinder 2 and the second cylinder 3 simultaneously.Not only further simplified the pump body structure of compressor, effectively utilize the space of cylinder body 1, and slide plate 5 both played transferring power and driven from the i.e. effect of the second cylinder 3 motions of dynamic air cylinder, the effect that can replace again the slide plate of the first cylinder 2 and the second cylinder 3 to separate the one or two cylinder working chamber.

For compressor of the present invention, in order to make the motion of slide plate 5 more smooth and easy, resistance is less, is provided with for holding the slide block slot 51 of slide block 41 on described joint 50, and described slide block 41 is clamped in described slide plate 5 both sides.Under the effect of slide block 41, slide plate 5 transmission the second cylinder 3 resistances are less, also can prevent from collaborating between the first cylinder 2 and the second cylinder 3, reduce leakage losses.

Based on the first cylinder 2 of the present invention and the second cylinder 3, pass through the needs of slide plate 5 transferring power, as the preferred embodiments of the present invention, described slide plate 5 is made into integration with the interior roller 21 of described the first cylinder and the interior roller 31 of the second cylinder.Also can select between slide plate 5 and the first cylinder 2 and the second cylinder 3 mode that can realize carry-over moment such as to be connected by hinged, pivot joint, ball bearing realizes.The present embodiment within connecting described slide plate 5 and described the first cylinder in roller 21 and the second cylinder roller 31 be made into integration as preferred Placement of the present invention and do not form the improper restriction to this programme Placement.

Lubricated most important to the performance impact of compressor, in conjunction with special construction of the present invention, in order to make effectively lubricating between the first cylinder 2, the second cylinder 3 and all parts thereof, the present invention is by being provided with the grease channel 51 being communicated with the oil supply hole being arranged on described bent axle 23 on the end face at described slide plate 5.The lubricant oil that will come on pump from bent axle 23 pump oil passages (because crank pump oil structure is same as the prior art, not repeating them here, with reference to prior art) causes the second cylinder 3 it is lubricated.Same, lubricant oil can form oil film when being lubricated between slide plate 5 and slide block 41, further prevents collaborating between the first cylinder 2 and the second cylinder 3.

Described the first cylinder intakeport 24 in the present invention is communicated with described the second cylinder intakeport 32.Set-up mode is with identical to the mode described in the description of cylinder body herein, and concrete something in common is referring to the elaboration to the first cylinder intakeport 24 and the second cylinder intakeport 32 above.

The setting position of suction and exhaust ports directly affects the clearance volume of compressor, clearance volume determines effective decrement of compressor and then affects efficiency, and described the first cylinder intakeport 24 of the present invention, the second cylinder intakeport 32 and the first cylinder exhaust port 25, the second cylinder exhaust port 33 are all arranged on described joint 50 near the edge of slide plate 5.The first cylinder intakeport 24 and the first cylinder exhaust port 25 are arranged on the edge of slide plate 5 both sides joints 50, have effectively reduced the clearance volume of the first cylinder 2; The second cylinder intakeport 32 is identical with the setting position of the second cylinder exhaust port 33 on joint 50, and same also have an above-mentioned useful technique effect.

Fig. 6 a, 6b show the structure that exhaust port is set on upper flange, the exhaust control structure of compressor is described in conjunction with Fig. 4, gas after compression need to be discharged the pump housing, compressor in the present invention offers respectively and two gas discharge outlets 82 corresponding on cylinder body 1 on upper flange 8, exhaust valve plate 102 covers on exhaust port 82, lift limiting board 103 is fixed on exhaust valve plate 103 on upper flange 8 by screw 104, forms exhaust controlling component, and the exhaust of compressor is controlled.

Inventor is through further research discovery, and in the second cylinder, the structure of roller 31 is more remarkable on the efficiency impact of compressor, and in described the second cylinder in the present invention, roller 31 is hollow cylinder.As shown in Figure 5, roller 31 lighter weight in the second cylinder of hollow cylinder, save material on the one hand, reduce on the other hand the i.e. i.e. inertia of the second cylinder 3 of driven transmission cylinder of the first cylinder 2 of cylinder initiatively, reduce energy loss, improve efficiency.

Fig. 7, Fig. 8 show the movement locus of compressor of the present invention; The present invention's the first cylinder 2 drives the second cylinder 3 runnings through slide plate 5, the movement locus of rational the first cylinder 2 and the second cylinder 3 can make compressor operating more stable, research through invention is found, the bent axle center of circle O of take sets up system of coordinates as coordinate center, referring to Fig. 7, Fig. 8, by following equation, limiting the movement locus of the first cylinder 2 and the second cylinder 3, can be that compressor operating is stable.Described bent axle is under motor drives, drive roller 21 2 rotations in the first cylinder under the effect of crankshaft eccentric portion 22 in described the first cylinder, by with described the first cylinder in the fixing described slide plate 5 of roller 21 drive roller 31 3 rotations in the second cylinder in described the second cylinder;

In described the first cylinder, roller 21 center of circle O movement locus are GO:

x＝ecosθ

y＝esinθ

In described the first cylinder, roller 21 cylindrical tracks are G1:

x＝(e+r)cosθ

y＝(e+r)sinθ

In described the second cylinder, roller 31 center of circle O ' movement locus are G0 ':

$x^{\′}=e\cos \mathrm{\θ}-L(\frac{L}{2}+e\cos \mathrm{\θ})/\mathrm{sqrt}[{(\frac{L}{2}+e\cos \mathrm{\θ})}^2+{\left(e\sin \mathrm{\θ}\right)}^2]$

$y^{\′}=e\sin \mathrm{\θ}-\mathrm{Le}\sin \mathrm{\θ}/\mathrm{sqrt}[{(\frac{L}{2}+e\cos \mathrm{\θ})}^2+{\left(e\sin \mathrm{\θ}\right)}^2]$

In described the second cylinder, roller 31 cylindrical movement locus are G2:

$x^{\′}=(e+r)\cos \mathrm{\θ}-L(\frac{L}{2}+(e+r)\cos \mathrm{\θ})/\mathrm{sqrt}[{(\frac{L}{2}+e+r)\cos \mathrm{\θ})}^2+{\left((e+r)\sin \mathrm{\θ}\right)}^2]$

$y^{\′}=(e+r)\sin \mathrm{\θ}-L(e+r)\sin \mathrm{\θ}/\mathrm{sqrt}[{(\frac{L}{2}+(e+r)\cos \mathrm{\θ})}^2+{\left((e+r)\sin \mathrm{\θ}\right)}^2]$

In above-mentioned formula: θ is the central angle that in described the first cylinder, roller 31 turns over, e is the offset of described eccentric part 22, r is roller 21 exradius in the first cylinder, and L is the distance between roller 31 center of circle O ' in interior roller 21 center of circle O of the first cylinder and the second cylinder.

In sum:

The cylinder body of duplex cylinder compressor provided by the invention and the new structure with its duplex cylinder compressor, by be arranged side by side the first cylinder 2 and the second cylinder 3 on a cylinder body 1, effectively reduce the height of the pump housing, reduction along with pump housing height, the adapt integral type roller (comprising that roller 31 in roller 21 in the first cylinder, the second cylinder, slide plate 5 form) of design of the present invention has substituted cleverly the slide plate of compressor and has played transferring power, has greatly simplified pump body structure.Even if the grease channel 51 arranging on slide plate 5 also can to the second cylinder 3 and assembly be lubricated and form oil film between slide plate 5 and joint 50 place's slide blocks 41 when low speed, prevent collaborating of compressor; And the first cylinder intakeport 24, the first cylinder exhaust port 25, the second cylinder intakepories 32 and the second cylinder exhaust port 33 design attitudes are chosen in joint 50 edges, reduced clearance volume, further improved the efficiency of compressor; Restriction by the first cylinder 2 and the second cylinder 3 regulations, makes compressor operating of the present invention more stable.

In this specification, technological scheme emphasis is described inventive point, and all the other parts same as the prior art, referring to prior art.

Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To these embodiments' multiple modification, will be apparent for those skilled in the art, General Principle as defined herein can be in the situation that do not depart from the spirit or scope of the embodiment of the present invention, realization in other embodiments.Therefore, the embodiment of the present invention will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. a cylinder body for duplex cylinder compressor, comprises the cylinder portion being arranged on described cylinder body, it is characterized in that, described cylinder portion comprises the first cylinder and the second cylinder being interconnected by joint; Described the first cylinder and described the second cylinder are laterally arranged on cylinder body; The both sides of described joint offer respectively the first cylinder intakeport, the second cylinder intakeport and the first cylinder exhaust port, the second cylinder exhaust port.

2. the cylinder body of duplex cylinder compressor according to claim 1, it is characterized in that, described joint comprises the first joint and the second joint, described the first joint is the cylinder body between the first cylinder upper end and the second cylinder upper end, the second joint is the cylinder body of described the first cylinder lower end and described the second cylinder lower end, the first cylinder intakeport, the second cylinder intakeport are arranged on the second joint, and the first cylinder exhaust port, the second cylinder exhaust port are arranged on the first joint.

3. the cylinder body of duplex cylinder compressor according to claim 1, is characterized in that, described the first cylinder intakeport is communicated with described the second cylinder intakeport.

4. a duplex cylinder compressor, comprises for holding the housing of the pump housing and motor, it is characterized in that, the described pump housing comprises: fixing upper flange, cylinder body and the lower flange of lamination successively; The cylinder portion being arranged on described cylinder body comprises the first cylinder and the second cylinder being interconnected by joint; Described the first cylinder and described the second cylinder are laterally arranged on described cylinder body; The both sides of described joint offer respectively the first cylinder intakeport, the second cylinder intakeport and the first cylinder exhaust port, the second cylinder exhaust port; In described the first cylinder, roller is connected with described motor by bent axle; In described the second cylinder, roller is connected with roller in described the first cylinder by the slide plate being arranged in described joint.

5. duplex cylinder compressor according to claim 4, is characterized in that, is provided with for holding the slide block slot of slide block on described joint, and described slide block is clamped in described slide plate both sides.

6. duplex cylinder compressor according to claim 4, is characterized in that, in described slide plate and described the first cylinder, in roller and the second cylinder, roller is made into integration.

7. duplex cylinder compressor according to claim 4, is characterized in that, is provided with the grease channel being communicated with the oil supply hole being arranged on described bent axle on the end face of described slide plate.

8. duplex cylinder compressor according to claim 4, is characterized in that, described the first cylinder intakeport is communicated with described the second cylinder intakeport.

9. duplex cylinder compressor according to claim 4, is characterized in that, described the first cylinder intakeport, the second cylinder intakeport and the first cylinder exhaust port, the second cylinder exhaust port are all arranged on described joint near the edge of slide plate.

10. according to the duplex cylinder compressor described in claim 4 to 9 any one, it is characterized in that, take the bent axle center of circle sets up system of coordinates as coordinate center, described bent axle is under motor drives, drive roller in described the first cylinder in the first cylinder, to rotate under the effect of crankshaft eccentric portion, by with described the first cylinder in the fixing described slide plate of roller drive roller in described the second cylinder to rotate in the second cylinder;

In described the first cylinder, roller center of circle movement locus is:

x＝ecosθ

y＝esinθ

In described the first cylinder, roller cylindrical track is:

x＝(e+r)cosθ

y＝(e+r)sinθ

In described the second cylinder, roller center of circle movement locus is:

$x^{\′}=e\cos \mathrm{\θ}-L(\frac{L}{2}+e\cos \mathrm{\θ})/\mathrm{sqrt}[{(\frac{L}{2}+e\cos \mathrm{\θ})}^2+{\left(e\sin \mathrm{\θ}\right)}^2]$

$y^{\′}=e\sin \mathrm{\θ}-\mathrm{Le}\sin \mathrm{\θ}/\mathrm{sqrt}[{(\frac{L}{2}+e\cos \mathrm{\θ})}^2+{\left(e\sin \mathrm{\θ}\right)}^2]$

In described the second cylinder, roller cylindrical movement locus is:

$x^{\′}=(e+r)\cos \mathrm{\θ}-L(\frac{L}{2}+(e+r)\cos \mathrm{\θ})/\mathrm{sqrt}[{(\frac{L}{2}+e+r)\cos \mathrm{\θ})}^2+{\left((e+r)\sin \mathrm{\θ}\right)}^2]$

$y^{\′}=(e+r)\sin \mathrm{\θ}-L(e+r)\sin \mathrm{\θ}/\mathrm{sqrt}[{(\frac{L}{2}+(e+r)\cos \mathrm{\θ})}^2+{\left((e+r)\sin \mathrm{\θ}\right)}^2]$

In above-mentioned formula: θ is the central angle that in described the first cylinder, roller turns over, the offset that e is described eccentric part, r is roller exradius in the first cylinder, L is the distance between the roller center of circle in the interior roller center of circle of the first cylinder and the second cylinder.