CN101278125B

CN101278125B - Variable capacity compressor

Info

Publication number: CN101278125B
Application number: CN2006800365945A
Authority: CN
Inventors: 朴成俊
Original assignee: Samsung Gwangju Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2005-10-07
Filing date: 2006-09-18
Publication date: 2010-06-09
Anticipated expiration: 2026-09-18
Also published as: WO2007043754A1; KR20070039193A; KR101161124B1; CN101278125A

Abstract

A variable capacity compressor for supply an appropriate amount of oil to frictional areas of a rotary shaft(40) or compression unit(20) regardless of a variation in the rotating speed of the rotary shaft. The compressor includes the refrigerant compression unit and a drive unit(30) disposed in a hermetic container(10) having an oil storage space(11), the rotary shaft having an end extending to the oil storage space, an oil flow path(42) formed in the rotary shaft, an oil pickup member(60) secured to the lower end of the rotary shaft to pick up and move the oil into the oil flow path by centrifugal force of the rotary shaft, and pickup blades(71b and 72b) provided in the oil pickup member. The number of the pickup blades that actually perform an oil pumping operation while being immersed in the oil is variable in inverse proportion to the rotating speed of the rotary shaft.

Description

Variable displacement compressor

Technical field

The present invention relates to a kind of variable displacement compressor, more particularly, relate to the oil supply structure that a kind of friction area that is used to running shaft and compression unit is lubricated.

Background technique

Recently, the variable displacement compressor that can change its refrigerant compression capability has been widely used in the refrigeration cycle of air-conditioning or refrigerator, to carry out the optimum refrigerating operation that satisfies the demands and reduce energy consumption by its variable refrigeration capacity.

Consider the general structure of conventional variable capacity compressor, as shown in Figure 1, conventional variable capacity compressor comprises: seal container 1, the outward appearance of qualification compressor; Compression unit 2 is arranged in the seal container 1, is used for compressed refrigerant; Driver element 3 is arranged in the seal container 1, is used to provide compressed refrigerant needed power; Running shaft 4 interconnects driver element 3 and compression unit 2, arrives compression unit 2 with the transmission of power with driver element 3.Variable displacement compressor is applied to the voltage of driver element 3 or the rotational speed that frequency changes running shaft 4 by adjustment, thereby realizes the change of refrigerant compression capability.

Seal container 1 its different position is provided with and is used for refrigeration agent being incorporated into the refrigerant suction pipe 1a in the seal container 1 from the outside and being used for refrigerant compressed in the seal container 1 is directed to outside refrigeration agent discharge pipe 1b.

Compression unit 2 comprises: cylinder block 2a has the refrigeration agent pressing chamber 2a-1 that territory, lateral areas within it limits; Piston 2b is installed among the pressing chamber 2a-1, is used to carry out straight reciprocating motion; Cylinder head 2c is attached on the cylinder block 2a, and with airtight pressing chamber 2a-1 hermetically, cylinder head opens wide towards pressing chamber 2a-1, and portion limits refrigeration agent suction chamber 2c-1 spaced apart from each other and refrigerant discharge chamber 2c-2 within it; Control valve unit 2d is arranged between pressing chamber 2a-1 and the cylinder head 2c, is used to control from refrigeration agent suction chamber 2c-1 be introduced in pressing chamber 2a-1 or be discharged into the flowing of refrigeration agent of refrigerant discharge chamber 2c-2 from pressing chamber 2a-1.

Driver element 3 comprises: stator 3a, install around the lower end of cylinder block 2a; Rotor 3b is positioned at stator 3a, with by rotating with the electrical interaction of stator 3a.Running shaft 4 is pressed onto the middle part of rotor 3b, and along with rotor 3b rotation.

Cylinder block 2a center is installed with through hole 2a-2, thereby the top of running shaft 4 is passed from this through hole 2a-2.Above through hole 2a-2, running shaft 4 has formation eccentric part 4a in the top.The eccentric part 4a of running shaft 4 is connected to piston 2b by connecting rod 2e, thereby the off-centre of eccentric part 4a rotatablely moves and is converted into the straight reciprocating motion of piston 2b.The lower end of running shaft 4 gives prominence to and extends to the bottom section of seal container 1 downwards from rotor 3b.

By above-mentioned structure, if running shaft 4 by the electrical interaction between stator 3a and the rotor 3b along with rotor 3b rotates together, then the piston 2b of eccentric part 4a that is connected to running shaft 4 by connecting rod 2e is in the to-and-fro motion of pressing chamber 2a-1 cathetus, thereby makes the refrigeration agent that is directed in the seal container 1 by suction pipe 1a be admitted among the pressing chamber 2a-1 by refrigeration agent suction chamber 2c-1.After being compressed in pressing chamber 2a-1, refrigeration agent is discharged among the refrigerant discharge chamber 2c-2 subsequently and is directed into discharge pipe 1b, thereby is discharged into the outside of seal container 1.Along with above-described process is repeated to carry out, can realize the compression of refrigeration agent.In this case, when the voltage that is applied to driver element 3 by adjustment and frequency changed the rotational speed of running shaft 4, the refrigerant compression capability of compressor can be adjusted thereupon.

Simultaneously, the oil storage space 1c that is used for the oil of storing predetermined amount is limited at the bottom section of seal container 1, running shaft 4 inside are formed with oil flow path 4b, and described oil flow path 4b is transported to the oil among the oil storage space 1c friction area of running shaft 4 or compression unit 2.The oil pick device is set at the lower end of running shaft 4, is used to make oil storage space 1c to be communicated with oil flow path 4b, and described oily pick device picks up the oil among the oil storage space 1c and it is moved towards oil flow path 4b by the rotary manipulation of running shaft 4.

Described oily pick device comprises the oily pick-up member 5 of near cylindrical and is constructed to be press fit into picking up board 6 in the oily pick-up member 5, thereby described oily pick-up member 5 has the open upper that the lower end that is press fit into running shaft 4 combines with running shaft 4, and the lower end that is formed centrally oil supply hole 5a therein.

Picking up board 6 has plate shape main body 6a and is positioned at a pair of pickup blades 6b of the lower end of main body 6a.Two pickup blades 6b are positioned at the opposite side of main body 6a with respect to the center cut of the lower end that is formed on main body 6a.Pickup blades 6b is relatively crooked on the sense of rotation of running shaft 4.

Therefore, if running shaft 4 rotations are to carry out the squeeze operation of refrigeration agent, then pass through the centrifugal force of running shaft 4, the oil that is stored among the oil storage space 1c is upwards sucked along oily pick-up member 5 and oil flow path 4b successively, thereby the friction area that makes oil be transported to running shaft 4 or compression unit 2 is lubricated.In this case, each pickup blades 6b of picking up board 6 upwards pumps into oil under being immersed in the oil level surface, thereby is used to assist the pick-up operation of oil.

Yet for above-described conventional variable capacity compressor, the oil mass that is provided to the friction area of running shaft 4 or compression unit 2 by oily pick device greatly depends on because the variation of the centrifugal force that the difference of the rotational speed of running shaft 4 causes.Therefore, when making running shaft 4 high speed rotating, may upwards pump into the oil of volume, cause, cause pump oil noise simultaneously owing to the power consumption that pumps into action need increases too much in order to increase the refrigeration agent discharge amount.On the contrary, when making running shaft 4 low speed rotation for the discharge amount that reduces refrigeration agent, the oil mass that pumps into may be not enough, the feasible effectively lubricating that can not realize running shaft 4 or compression unit 2.

Summary of the invention

Technical problem

Therefore, studied the present invention in order to address the above problem, the object of the present invention is to provide a kind of variable displacement compressor, described variable displacement compressor can be provided to an amount of oil the friction area of running shaft or compression unit, and no matter the variation of the rotational speed of running shaft how.

Technological scheme

According to an aspect of the present invention, can realize above-mentioned and other purpose by a kind of variable displacement compressor is provided, described variable displacement compressor comprises: seal container has the oil storage space that limits at its bottom section; Compression unit is arranged in the seal container, is used for compressed refrigerant; Driver element is arranged in the seal container, is used to provide the power of compressed refrigerant needs; Running shaft interconnects driver element and compression unit, thereby the transmission of power of driver element is arrived compression unit, and the lower end of described running shaft extends in the oil storage space, and the rotational speed of described running shaft can change according to refrigerant compression capacity; The oil flow path is formed in the running shaft, is used for the oil of oil storage space is directed to the friction area of compression unit and running shaft; Cylindrical oily pick-up member is installed to the lower end of running shaft, is used to make oil storage space to be communicated with the oil flow path, picks up the oil of oil storage space and oil is moved in the oil flow path with the centrifugal force by running shaft; A plurality of pickup blades are arranged in the oily pick-up member, are used to assist pump oil operation, the actual quantity of carrying out the pickup blades in the oil that the operation of pump oil is immersed in oil storage space simultaneously can with the inversely proportional variation of the rotational speed of running shaft.

Pickup blades can comprise a plurality of pickup blade group, and described a plurality of pickup blade group are arranged as multistage along the axial direction of running shaft.

Pickup blade group can comprise first pickup blade group of bottom and second pickup blade group on top.

Variable displacement compressor also can comprise the picking up board that is pressed onto in the oily pick-up member, and pickup blades is formed on the picking up board, and described picking up board can comprise: first picking up board has first pickup blade group that is formed on its lower end; Second picking up board has second pickup blade group that forms its lower end, and described second picking up board is positioned at first picking up board top.

The removably combination mutually of first picking up board and second picking up board.

First picking up board and second picking up board can have mutually the same shape and size.

To partly set forth other aspect of the present invention and/or advantage in the following description, part in addition will be obvious by this description, perhaps understand by implementing the present invention.

Beneficial effect

The invention provides a kind of variable displacement compressor, wherein, being used in being arranged on oily pick-up member assisted a plurality of pickup blades of pump oil operation, selected actual carry out in the oil that the operation of pump oil is immersed in oil storage space simultaneously pickup blades quantity can with the inversely proportional variation of the rotational speed of running shaft.This has no matter how the variation of the rotational speed of running shaft makes all that an amount of oil is supplied to the beneficial effect of the friction area of running shaft and compression unit.

Description of drawings

By the detailed description of carrying out below in conjunction with accompanying drawing, above and other objects of the present invention, characteristics and other advantage easier quilt that will become is understood, wherein:

Fig. 1 is the sectional view of the general structure of schematically illustrated conventional variable capacity compressor;

Fig. 2 is the sectional view of the general structure of schematically illustrated variable displacement compressor according to a preferred embodiment of the invention;

Fig. 3 is the perspective exploded view of the oily pick device of Fig. 2, the figure shows separated oily pick-up member and picking up board;

Fig. 4 is the perspective view of the oily pick device of Fig. 2, the figure shows the oily pick-up member and the picking up board that mutually combine;

Fig. 5 is mounted in the sectional view according to the amplification of the oily pick device in the variable displacement compressor of the embodiment of the invention, the figure shows the halted state of running shaft;

Fig. 6 is mounted in the sectional view according to the amplification of the oily pick device in the variable displacement compressor of the embodiment of the invention, the figure shows the high speed rotating state of running shaft;

Fig. 7 is mounted in the sectional view according to the amplification of the oily pick device in the variable displacement compressor of the embodiment of the invention, the figure shows the low speed rotation state of running shaft.

Embodiment

To describe embodiments of the invention in detail, in the accompanying drawing shown in its example, wherein, identical label is represented identical parts all the time.Embodiment is described below with reference to the accompanying drawings to explain the present invention.

With reference to the Fig. 2 that shows variable displacement compressor according to a preferred embodiment of the invention, described variable displacement compressor comprises: seal container 10, and the outward appearance of qualification compressor has oil storage space 11 at its bottom section; Compression unit 20 is arranged in the seal container 10, is used for compressed refrigerant; Driver element 30 is arranged in the seal container 10, is used to provide compressed refrigerant needed power; Running shaft 40 interconnects driver element 30 and compression unit 20, arrives compression unit 20 with the transmission of power with driver element 30.

Running shaft 40 has by adjustment and is applied to the voltage of driver element 30 or frequency and the rotational speed that can change.As a result, the variable rotational speed of running shaft 40 makes the refrigerant compression capability of compression unit 20 change.Seal container 10 is provided with at its diverse location place and is used for refrigeration agent refrigerant suction pipe of 10 12 and be used for seal container 10 refrigerant compressed are directed to outside refrigeration agent discharge pipe 13 from the exterior guiding to the seal container.

Compression unit 20 comprises: cylinder block 21 has the refrigeration agent pressing chamber 21a that is formed in its medial region; Piston 22 is installed among the pressing chamber 21a, is used to carry out straight reciprocating motion; Cylinder head 23 is attached on the cylinder block 21, is used for airtight hermetically pressing chamber 21a, and cylinder head 23 opens wide towards pressing chamber 21a, and portion limits refrigeration agent suction chamber 23a spaced apart from each other and refrigerant discharge chamber 23b within it; Control valve unit 24 is arranged between pressing chamber 21a and the cylinder head 23, is used to control from refrigeration agent suction chamber 23a be introduced in pressing chamber 21a or be discharged into the flowing of refrigeration agent of refrigerant discharge chamber 23b from pressing chamber 21a.

Driver element 30 comprises: stator 31, install around the lower end of cylinder block 21; Rotor 32 is positioned at stator 31, is used for by rotating with the electrical interaction of stator 31.Running shaft 40 is pressed onto the middle part of rotor 32, is used for along with rotor 32 rotations.

Cylinder block 21 centers are installed with through hole 21b, thereby the top of running shaft 40 passes therethrough.Above through hole 21b, running shaft 40 has formation eccentric part 41 in the top.The eccentric part 41 of running shaft 40 is connected to piston 22 by connecting rod 25, thereby the off-centre of eccentric part 41 rotatablely moves and is converted into the straight reciprocating motion of piston 22.The lower end of running shaft 40 gives prominence to and extends to the oil storage space 11 of seal container 10 downwards from rotor 32.

By above-mentioned structure, if make running shaft 40 along with rotor 32 rotates together by the electrical interaction between stator 31 and the rotor 32, then the piston 22 that is connected to running shaft 4 by connecting rod 25 is in the to-and-fro motion of pressing chamber 21a cathetus, thereby makes the refrigeration agent that is directed in the seal container 10 by suction pipe 12 be transported among the pressing chamber 21a by refrigeration agent suction chamber 23a.After being compressed in pressing chamber 21a, refrigeration agent is discharged among the refrigerant discharge chamber 23b, is directed into discharge pipe 13 then, thereby is discharged into the outside of seal container 10.Along with above-described process is repeated to carry out, can realize the compression of refrigeration agent.In this case, along with voltage that is applied to driver element 30 by adjustment and frequency change the rotational speed of running shaft 40, the refrigerant compression capability of compressor can be adjusted.

In the compression process of refrigeration agent, the friction area that is fed to running shaft 40 and compression unit 20 for the oil that will be in the oil storage space 11 stores is to be lubricated, and the inside of running shaft 40 is formed with the oil flow path 42 that is used for the oil of oil storage space 11 is directed to the friction area of running shaft 40 or compression unit 20.Oil pick device 50 is arranged on the lower end of running shaft 40, is used to make oil storage space 11 and oil flow path 42 to be communicated with, and picks up the oil in the oil storage space 11 and oil is moved towards oil flow path 42 by the rotary manipulation of running shaft 40.

Oil flow path 42 comprises: the first oil flow path 42a is limited at the lower end that is arranged in through hole 21b below of running shaft 40; The second oil flow path 42b, be communicated with the first oil flow path 42a, be formed on the top of running shaft 40 in the through hole 21b, and be communicated with the outer surface of running shaft 40, in the through hole 21b and the slit between the running shaft 40 that supply oil to cylinder block 21 by the hole that in running shaft 40, penetrates; The 3rd oil flow path 42c is communicated with the second oil flow path 42b, is formed in the eccentric part 41, is used for to compression unit 20 supply oil.After in turn by each

oil flow path

42a, 42b and 42c, oil turns back to oil storage space 11, thereby is repeated to be fed to oil flow path 42.

Oil pick device 50 comprises the oily pick-up member 60 of near cylindrical, and described oily pick-up member 60 has: the upper end of opening wide, and described unlimited upper end is press-fited and is attached to the lower end of running shaft 40, to be communicated with the first oil flow path 42a; Be formed with the lower end of oil supply hole 61 at the center, described lower end is immersed in the oil that stores in the oil storage space 11.

Therefore, if running shaft 40 rotations are to carry out the refrigeration agent squeeze operation, the centrifugal force of oil by running shaft 40 that then is stored in the oil storage space 11 is upwards sucked along oily pick-up member 60 and oil flow path 42 in turn, thereby the friction area that is transported to running shaft 40 and compression unit 20 is lubricated.

Oil pick device 50 also comprises the picking up board 70 that is constructed to be press fit in the oily pick-up member 60.In the variable displacement compressor according to present embodiment, picking up board 70 has a plurality of

pickup blades

71b and 72b, and described

pickup blades

71b and 72b are constructed to the oil in the oil storage space 11 is upwards pumped into towards oil flow path 42.In a plurality of

pickup blades

71b and 72b, the actual oily quantity of operating the selected pickup blades in the oil that is immersed into simultaneously in the oil storage space 11 of pump of carrying out can change inversely with the rotational speed of running shaft 40.

The be inversely proportional to reason that changes of the quantity that makes the pickup blades 71b of actual execution pump oil operation and 72b and the rotational speed of running shaft 40 is for an amount of oil is fed in the friction area of running shaft 40 or compression unit 20, and the variation of the rotational speed that changes regardless of the refrigerant compression capacity according to compressor of running shaft 40 how.

More particularly, as shown in Figure 3 and Figure 4, picking up board 70 comprises a pair of picking up board: first picking up board 71 of bottom and second picking up board 72 on top.First picking up board 71 comprises the first main body 71a of plate shape and is formed on a pair of first pickup blades 71b of the lower end of the first main body 71a.Similarly, second picking up board 72 comprises the second main body 72a and a pair of second pickup blades 72b that is formed on the lower end of the second main body 72a of plate shape.

The center of the lower end of the first main body 71a and the second main body 72a is formed with otch 71c and 72c respectively, thereby the first pickup blades 71b is positioned at the relative both sides of otch 71c, and it is relatively crooked on the sense of rotation of running shaft 40, the second pickup blades 72b is positioned at the relative both sides of otch 72c, and relatively crooked on the sense of rotation of running shaft 40.The first main body 71a middle part in the top is formed with insertion groove 71d in addition, thereby the otch 72c of the second main body 72a combines with insertion groove 71d downwards.

By above-mentioned structure, if after being installed to first picking up board 71 in the upper end insertion groove 71d that is inserted into the first main body 71a by lower end otch 72c and with second picking up board 72 with the second main body 72a, first picking up board 71 and second picking up board 72 are press fit in the oily pick-up member 60, then a pair of pickup blades 71b limits first group 80 that is positioned at lower area in oily pick-up member 60, a pair of second pickup blades 72b limits second group 90 that is positioned at upper area in oily pick-up member 60.First group 80 and second groups 90 that obtain have multi-layer structure on the axial direction of running shaft 40.

First group 80 the first pickup blades 71b has different height each other with second group 90 the second pickup blades 72b, and the height on the oil level surface of the oil storage space 11 that consideration changes along with the variation of the rotational speed of running shaft 40 is determined the diverse location between the first pickup blades 71b and the second pickup blades 72b.

Specifically, if running shaft 40 high speed rotating, then running shaft 40 produces big centrifugal force, thereby the oil mass that is upwards sucked along oily pick-up member 60 and oil flow path is increased, the result, and the oil level surface of oil storage space 11 reduces.On the contrary, if running shaft 40 low speed rotation are to reduce compression volume, then running shaft 40 produces little centrifugal force, therefore, the feasible oil mass that will be in turn upwards sucked along oily pick-up member 60 and oil flow path reduces, the result, and the oil level surface in the oil storage space 11 raises.Consider that first group 80 the first pickup blades 71b is set to be immersed in all the time in the oil of oil storage space 11 according to the height on the oil level surface of the variation of the rotational speed of running shaft 40.Second group 90 the second pickup blades 72b is set to be immersed in the oil of oil storage space 11 when running shaft 40 low speed rotation, but when running shaft 40 high speed rotating, is positioned on the oil level surface of oil storage space 11.

Now, the oil supply structure that will explain picking up board 70 based on the high speed rotating and the low speed rotation of running shaft 40 with above-mentioned structure.

At first, if the running shaft under the halted state 40 beginning high speed rotating to realize significantly improving of refrigerant compression capability, then the centrifugal force of running shaft 40 increases, thereby makes in turn the oil mass that is upwards sucked along oily pick-up member 60 and oil flow path 42 increase.As a result, the oil level surface that is stored in the oil storage space 11 significantly reduces, as shown in Figure 6.Under this state that reduces on oil level surface, second group 90 the second pickup blades 72b is positioned on the oil level surface, only first group 80 the first pickup blades 71b in the oil that is immersed in oil storage space 11 in rotation.

Therefore, the oil mass that the centrifugal force by running shaft 40 pumps into increases, and reduces by the oil mass that picking up board 70 pumps into.Therefore, even in the high speed rotating scope of running shaft 40, can prevent also that the oil of volume was provided to running shaft 40 or compression unit 20.

In addition, if running shaft 40 low speed rotation are to reduce refrigerant compression capacity, then the centrifugal force of running shaft 40 reduces, and therefore, makes in turn along oily pick-up member 60 and the upwards oil mass minimizing of suction of oil flow path 42.As a result, the horizontal surface of the oil that stores in the oil storage space 11 raises, as shown in Figure 7.Under the state that raises on oil level surface, first group 80 all pickup blades 71b and second group 90 pickup blades 72b in the oil that is immersed in oil storage space 11 in rotation.

Therefore, the oil mass that the centrifugal force by running shaft 40 pumps into reduces, and increases by the oil mass that pickup blades 70 pumps into.Therefore, even in the low speed rotation scope of running shaft 40, also can be so that the oil of capacity is fed in the friction area of running shaft 40 or compression unit 20 effectively.

In the present embodiment, first picking up board 71 and second picking up board 72 are set to be separated from each other and removably mutually combine.Therefore, be understandable that if any is damaged in first picking up board 71 and second picking up board 72, then the variable displacement compressor of present embodiment can easily be changed that of damage, and does not need all pickup blades 70 are all removed.

In addition, it should be noted that first picking up board 71 and second picking up board 72 have mutually the same shape and size.Therefore, the second main body 72a of second picking up board 72 can form insertion groove 72d in the mode identical with first picking up board 71.First picking up board 71 and both identical shaped and sizes of second picking up board 72 make win picking up board 71 and second picking up board 72 can be general, and can realize the raising of the productivity of variable displacement compressor.

Utilizability on the industry

Be clear that by foregoing description, the invention provides a kind of variable displacement compressor, wherein, in a plurality of pickup blades that are arranged on the oily pick-up member that is used for assisting the operation of pump oil, be selected in being immersed in the oil of oil storage space the oily pickup blades of operating of actual executions pump quantity can with the inversely proportional variation of the rotational speed of running shaft.This has no matter how the variation of the rotational speed of running shaft can both make that an amount of oil is supplied to the effect of the friction area of running shaft and compression unit.

Although for the preferred embodiments of the present invention that disclose of illustrative purpose,, it should be appreciated by those skilled in the art that under situation about not departing from the scope of the present invention with spirit, can make and add and replace, scope of the present invention is open by claim.

Claims

1. variable displacement compressor comprises:

Seal container has the oil storage space at the sealing container bottom area limiting;

Compression unit is arranged in the seal container, is used for compressed refrigerant;

Driver element is arranged in the seal container, is used to provide the power of compressed refrigerant needs;

Running shaft interconnects driver element and compression unit, thereby the transmission of power of driver element is arrived compression unit, and the lower end of described running shaft extends to oil storage space, and the rotational speed of running shaft changes according to refrigerant compression capacity;

The oil flow path is formed in the running shaft, is used for the oil of oil storage space is directed to the friction area of compression unit and running shaft;

Cylindrical oily pick-up member is installed to the lower end of running shaft, is used to make oil storage space and oil flow path to be communicated with, and picks up the oil in the oil storage space and the oil in the oil storage space is moved in the oil flow path with the centrifugal force by running shaft;

A plurality of pickup blades are arranged in the oily pick-up member, are used to assist the oily operation of pump, and the actual pump oil of carrying out is operated the quantity of the pickup blades in the oil that is immersed in oil storage space simultaneously and the inversely proportional variation of rotational speed of running shaft,

Wherein, pickup blades comprises a plurality of pickup blade group, and described a plurality of pickup blade group are arranged as multistage along the axial direction of running shaft.

2. compressor as claimed in claim 1, wherein, pickup blade group comprises first pickup blade group of bottom and second pickup blade group on top.

3. compressor as claimed in claim 2 also comprises:

Picking up board is pressed onto in the oily pick-up member, and described pickup blades is formed on the picking up board,

Wherein, picking up board comprises: first picking up board has first pickup blade group that is formed on its lower end; Second picking up board has second pickup blade group that is formed on its lower end, and described second picking up board is positioned at first picking up board top.

4. compressor as claimed in claim 3, wherein, first picking up board and second picking up board removably mutually combine.

5. compressor as claimed in claim 4, wherein, first picking up board and second picking up board have mutually the same shape and size.