CN1201111A - Refrigerating compressor - Google Patents

Abstract

Disclosed is a refrigeration compressor, wherein a first cylinder head is fixed on one end-face of a cylinder body through a valve disk, a second cylinder head is fixed on the other end-face of the cylinder body, a first high-pressure chamber is arranged in the first cylinder head, and high-pressure refrigerating gas is supplied into the first high-pressure chamber from a compression chamber of the cylinder. A crankcase is arranged in the second cylinder head, and a second high-pressure chamber connected with the first high-pressure chamber is arranged in the cylinder. High-pressure refrigerating gas in the second high-pressure chamber is discharged out of the compressor through an exhaust port. An oil separation part separates oil from the high-pressure refrigerating gas flowing into the second high-pressure chamber, and the separated oil is supplied into the crankcase through a communicating channel.

Description

Refrigeration compressor

The present invention relates to a kind of refrigeration compressor, more specifically, the external peripheral surface that relates to a kind of cylinder block is provided with the refrigeration compressor of a hyperbaric chamber with the pulsation that reduces the refrigeration air-flow.

Fig. 1 illustrates a kind of layout of general plan of common Wobble plate compressor (refrigeration compressor).

Above-mentioned compressor has a cylinder block 101 that has several cylinder-bore 106, and described cylinder-bore 106 is passed cylinder block 101 around transmission shaft 105 vertically by the predetermined circle spacing.This cylinder block 101 have one by valve disc 102 be fixed on the back cylinder head 103 ear end face, this back cylinder head 103 form by an exhaust chamber 112 and an induction chamber 113.

Cylinder block 101 has a front-end face that is fixed on the preceding cylinder head 104, and preceding cylinder head 104 has a crankcase 108 of admitting swing disc 110.

Back cylinder head 103, cylinder block 101 and preceding cylinder head 104 are longitudinally tightened up by a plurality of through bolt (not shown) and form as a whole assembly.

The external peripheral surface of cylinder block 101 is provided with a hyperbaric chamber 122 that is used to reduce the high pressure of refrigeration air-flow, make a groove 101a on the external peripheral surface of above-mentioned cylinder block 101, a lid 160 is fixed on the edge of opening of above-mentioned groove 101a by a seal ring 153.

Hyperbaric chamber 122 is made of the inner wall surface of lid 160 and the groove 101a of cylinder block 101.Hyperbaric chamber 122 is communicated with exhaust chamber 112 by a communication channel 134 and the outward extending inclined hole 135 of radial axis that favours transmission shaft 105 from exhaust chamber 112 edges that is parallel to the direction extension of transmission shaft 105.

Valve disc 102 has the refrigerant outlet 116 that is used for being communicated with respectively a corresponding cylinder-bore 106 and exhaust chamber 112 and is used for being communicated with respectively the refrigerant inlet 115 of a corresponding cylinder-bore 106 and induction chamber 113.

Refrigerant outlet 116 is fixed to the outlet valve 117 opening and closing rear side end face of valve disc 102 on it with valve retainer 118 by rivet 119 by corresponding one respectively.

A pilot hole 127 is arranged near rivet 119, be used for being communicated with exhaust chamber 112 and the receiving hole 125 that is arranged in the cylinder block 101 by throttle orifice 126.

By pilot hole 127 and throttle orifice 126 the high pressure cooling gas in the exhaust chamber 112 is fed to bearing receiving hole 125, and then is fed to crankcase 108 from bearing receiving hole 125 by bearing receiving hole 128.As a result, just oil contained in the cooling gas is fed to thrust bearing 145,146, radial bearing 147,148, waits.

The refrigeration air-flow that is transported to exhaust chamber 112 from pressing chamber expands exhaust chamber.The flow velocity that flows out the cooling gas of exhaust chamber 112 is subjected to the restriction of inclined hole 135 and communication channel 134.Cooling gas reexpands when flowing into hyperbaric chamber 122, and is last, and the flow velocity of cooling gas then, is discharged from outside the compressor by relief opening 123 restrictions.Therefore reduced the pulsation that the refrigeration air-flow flows and produced in compressor.

But, the problem of this structure is, because refrigeration air-flow speed when flowing into exhaust chamber 112 and hyperbaric chamber 122 reduces, so contained a part of gaseous state oil will separate with cooling gas in the cooling gas, and accumulates in the bottom of staying exhaust chamber 112 and hyperbaric chamber 122 in other words.

Especially in hyperbaric chamber 122, because the structure of compressor is that cooling gas is upwards discharged outside the hyperbaric chamber 122, so refrigeration air-flow speed after the inner wall surface of collision lid 160 slows down.Therefore, because the difference of proportion between oil and the cooling gas, oil separates with cooling gas easily and accumulates in the bottom in hyperbaric chamber 122.

As a result, contained oil mass reduces gradually in the cooling gas that flows in compressor, just can not fully cool off at last and lubricated thrust bearing 145, radial bearing 148 etc.When compressor is in minimum quantity delivered in other words under the operating mode of the high speed low-load of minimum transmission power when (this moment, the flow velocity of cooling gas was little), above-mentioned situation takes place especially easily.

The purpose of this invention is to provide a kind of reliable refrigeration compressor, this compressor structure can be supplied with enough oil to the thrust bearing in the compressor, radial bearing etc., also is like this even be under the operating mode (this moment, the cooling gas flow was little) of high speed low-load at compressor.

In order to achieve the above object, the present invention proposes a kind of refrigeration compressor, and it contains: a cylinder block; A valve disc; First cylinder head on end face that is fixed to above-mentioned cylinder block by above-mentioned valve disc; Second cylinder head on other end that is fixed to cylinder block; One is arranged on first cylinder head pressing chamber interior and in cylinder block and imports first hyperbaric chamber of high pressure cooling gas to its; A crankcase that is located in second cylinder head; One is arranged in the cylinder block and second hyperbaric chamber that is connected with first hyperbaric chamber; With a relief opening, the high pressure cooling gas in second hyperbaric chamber drains into outside the compressor by this relief opening.

Above-mentioned refrigeration compressor is characterised in that and contains:

One is used to make the oily oily separation member that separates with the high pressure cooling gas that flows into second hyperbaric chamber; With

Oil that will separate with the high pressure cooling gas in second hyperbaric chamber by it is fed to the communication channel in the crankcase.

According to above-mentioned this refrigeration compressor, contained oil or oiling agent separates itself and cooling gas by the above-mentioned oily separation member that is arranged in second hyperbaric chamber in the cooling gas, and accumulate in the bottom in second hyperbaric chamber, then, the oil that to assemble by communication passage flows back in the crankcase, so can increase the oil mass that infeeds crankcase, thereby make thrust bearing, radial bearing in the crankcase have enough oil to be lubricated.

Second hyperbaric chamber preferably contain one on the external peripheral surface that is arranged on cylinder block groove and the lid on edge of opening that is fixed on this groove, above-mentioned oily separation member is a plate, this plate contains at least one and penetrates its open-work, and is placed between above-mentioned groove and the lid.

According to this most preferred embodiment, the flow of cooling gas penetrates the above-mentioned open-work that is inserted in the plate between groove and the lid by at least one and controls.Therefore the pulsation of the cooling gas that produces in the gap that can further reduce to form between groove inwall and the plate.And refrigeration air-flow speed behind the collision plate slows down, and oil contained in the cooling gas is separated from cooling gas owing to the difference of proportion between oil and the cooling gas.

Above-mentioned communication channel preferably is provided with throttle mechanism.

Refrigeration compressor preferably has one and places another end face of cylinder block and the sealing gasket between second cylinder head, and communication channel preferably contains the first passage and the open-work that passes above-mentioned sealing gasket that extend to the other end of cylinder block from second hyperbaric chamber.

Above-mentioned open-work is a throttle orifice preferably, and forms throttle mechanism by this throttle orifice.

In addition, first passage also can be a path open-work, and forms throttle mechanism by this path open-work.

Refrigeration compressor preferably has one and places the other end of cylinder head and the sealing gasket between second cylinder head, communication channel preferably contains a first passage that extends to the other end of cylinder block from second hyperbaric chamber, first open-work that passes sealing gasket, the second channel of a peripheral wall that extends through second cylinder head (this peripheral wall forms crankcase) and one pass second open-work that above-mentioned peripheral wall extends to crankcase from second channel.

Second open-work is a path hole preferably, and constitutes throttle mechanism by this path hole.

According to this most preferred embodiment, owing to be provided with throttle mechanism in preceding cylinder head, oil can infeed crankcase near thrust bearing and radial bearing, and this just might prevent above-mentioned burning in of bearing reliably.

In addition, refrigeration compressor preferably contains a transmission shaft that passes crankcase, passes above-mentioned peripheral wall the good axis tilt with respect to transmission shaft of path Kongzui.

According to this most preferred embodiment, owing to process the path hole by required angle of inclination, thus can be to the desired area fuel feeding of crankcase with lubricated radial bearing and thrust bearing, this is further lubricating efficiency of raising compressor just.

Refrigeration compressor preferably has a transmission shaft that passes crankcase, with rotatable parts (these rotatable parts comprise at least one bearing) that are installed on the transmission shaft, second channel preferably passes peripheral wall and extends to the position roughly corresponding with the position of at least one bearing.

The position that the path Kongzui departs from the sense of rotation of rotatable parts fortunately feeds crankcase.

The several holes that at least one open-work of above-mentioned plate preferably processes on the whole position relative with the opening of groove.

Above-mentioned plate is preferably on its annular portion relative with the edge of opening of groove a carinate protuberance is set.

According to this most preferred embodiment, can save seal ring used in the prior art, therefore also just do not need to process the operation of the groove that matches with seal ring.

To understand more above-mentioned purpose, feature and advantage of the present invention from the detailed description of carrying out below in conjunction with accompanying drawing with other, in the accompanying drawing:

Fig. 1 is the longitudinal section of the general structure of common refrigeration compressor (Wobble plate compressor);

Fig. 2 is the longitudinal section of the general structure of the refrigeration compressor (Wobble plate compressor) by first embodiment of the invention;

Fig. 3 is the amplification view of the major component of Fig. 2 compressor;

The planimetric map of the baffle plate that Fig. 4 A is in Fig. 3 to be seen;

Fig. 4 B is the sectional view of baffle plate;

Fig. 5 is the planimetric map of the sealing gasket seen in Fig. 2;

Fig. 6 is a kind of amplification view of major component of Wobble plate compressor of remodeling;

Fig. 7 is the amplification view of the major component of another kind of Wobble plate compressor of retrofiting; With

Fig. 8 is the amplification view of the major component of the refrigeration compressor (Wobble plate compressor) according to second embodiment of the invention.

Describe the present invention in detail referring to the accompanying drawing that most preferred embodiment is shown below.

Fig. 2 illustrates the general structure of the Wobble plate compressor (refrigeration compressor) by first embodiment of the invention, and Fig. 3 illustrates the enlarged view of the major component of above-mentioned compressor, and Fig. 4 A is the planimetric map of baffle plate, and Fig. 4 B is the sectional view of baffle plate, and Fig. 5 is the planimetric map of sealing gasket.

Above-mentioned Wobble plate compressor has a cylinder block 1, and an end face of this cylinder block 1 is fixed on the cylinder head 3 of back by valve disc 2, and its another end face then is fixed on the preceding cylinder head 4 by sealing gasket 80.

Back cylinder head 3, cylinder block 1 and preceding cylinder head 4 are fixed tightly in together along the longitudinal direction by a plurality of through bolt (not shown) that pass them, constitute an entire combination part.

Cylinder block 1 has 5 cylinder-bore 6 of axially passing it by the predetermined circle spacing around transmission shaft 5, and each cylinder-bore 6 has one and places its inner piston 7 slidably.

The external peripheral surface of cylinder block 1 is provided with a hyperbaric chamber (second hyperbaric chamber) 22.On the external peripheral surface of cylinder block 1, make a groove 1a, on the edge of opening 1b of this groove 1a, be fixed with a lid (cover piece) 60 by a baffle plate (oily separation member) 50.

The groove 1a of the inner wall surface of lid 60 and cylinder block 1 constitutes hyperbaric chamber 22.Cooling gas is discharged outside the hyperbaric chamber 22 by relief opening 23, and sends into a condenser (not shown) that is connected with the front surface of radiator (not shown).

Also as a sealing gasket, it is made by the cold rolled sheet/lath of certain-length baffle plate 50, and its shape is identical with the cross section of the groove 1a at the edge that has opening and this opening of formation.Have annular carinate protuberance 51 and a plurality of open-work 52 that a circumferential section relative with edge 1b that gone out by mold pressing forms on the baffle plate 50, this open-work 52 all is positioned at (see figure 4) on the position relative with the opening of groove 1a on the baffle plate.The passage that these open-works 52 flow through as cooling gas.

Baffle plate 50 is fixed on the edge 1b by two bolt (not shown) that pass open-work 53 with lid 60.This baffle plate 50 is divided into a following hyperbaric chamber 22A and a last hyperbaric chamber 22B with the inner space in hyperbaric chamber 22.

Groove 1a has a rear sidewall that has the passage 31 that is connected with the passage 34 of formation in the back cylinder head 3 by pipe joint 70.Between pipe joint 70 and cylinder block 1, insert a seal ring 71, make between them to seal, and between pipe joint 70 and back cylinder head 3, also insert a seal ring 72, make between them to seal.

12 and induction chambers 13 around this exhaust chamber 12 of an exhaust chamber (first hyperbaric chamber) are set in the back cylinder head 3.Exhaust chamber 12 is connected with passage 34 by an inclined hole 35, and this inclined hole 35 extends radially outwardly along the direction that with the axis tilt of transmission shaft 5 but does not intersect with induction chamber 13 from exhaust chamber 12.

Valve disc 2 has a plurality of refrigerant outlets hole 16 and a plurality of refrigerant inlet hole 15, each above-mentioned exit orifice 16 is used for being communicated with respectively corresponding plenum chambers 91 and exhaust chambers 12 spaced by corresponding predetermined circle, each cylinder-bore 6 interior formation, and 15 above-mentioned of each inlet holes are used for being communicated with respectively by spaced corresponding plenum chamber 91 of corresponding predetermined circle and induction chamber 13.

Refrigerant outlet hole 16 is fixed on the outlet valve 17 respectively opening and closing rear side end face of valve disc 2 on by rivet 19 with valve retainer 18 by corresponding one.

On the other hand, refrigerant inlet hole 15 by corresponding one by rivet 19 21 opening and closing respectively of the Aspirating valves on the side end face before outlet valve 17 and valve retainer 18 are fixed on valve disc 2.

A pilot hole 27 is set near rivet 19, is used for being communicated with exhaust chamber 12 and the cylinder block 1 interior receiving hole 25 that forms by throttle orifice 26.

By above-mentioned pilot hole 27 and throttle orifice 26 the high pressure cooling gas in the exhaust chamber 12 is infeeded bearing receiving hole 25, and then infeed in the crankcase 8 by bearing receiving hole 28 from bearing receiving hole 25.

In addition, groove 1a is connected with crankcase 8 by communication channel 32, this communication channel 32 is by the passage 32A of bottom and a passage 32B who forms on side end face after the preceding cylinder head 4 form insertion sealing gasket 80 between passage 32A and 32B in other words under the front panel that passes groove 1a.

Sealing gasket 80 makes and forms sealing between cylinder block 1 and the preceding cylinder head 4, spills from crankcase 8 to prevent G﹠O.

Sealing gasket 80 is ring parts 81 roughly that the cold rolled sheet of certain-length/lath punching press and perforation are formed, as shown in Figure 5.This ring part 81 has an aperture 83 and a plurality of open-work 82 that passes bolt.Above-mentioned aperture 83 is arranged on the middle part that is positioned at communication channel 32 in other words, as a throttle orifice between mutually different hyperbaric chamber 22 of pressure and crankcase 8.

In crankcase 8, admit a thrust flange 41, a power wheel hub 42 and a swing disc 10.

Thrust flange 41 is rigidly fixed on the transmission shaft 5, and is rotatably supported in by bearing 43 on the inwall of preceding cylinder head 4.

Power wheel hub 42 is installed in rotation on the transmission shaft 5 by hinge ball 9, is connected with thrust flange 41 by linking mechanism 49 again simultaneously.

Swing disc 10 is installed on the power wheel hub 42 by thrust bearing 45 and radial bearing 48, so swing disc 10 can be carried out oscillating motion.

In addition, swing disc 10 is connected with each piston 7 by connecting rod 11, and piston 7 moves in a corresponding cylinder-bore 6 in reciprocating mode according to the axial runout of swing disc 10.The angle of inclination of swing disc 10 changes with the pressure in the crankcase.

The following describes the work of the Wobble plate compressor of said structure.

When the moment of torsion of motor (not shown) is delivered to when making it to rotate on the transmission shaft 5, thrust flange 41 and power wheel hub 42 just rotate with transmission shaft 5, thereby make swing disc 10 do axial oscillating motion.The axial oscillating motion of swing disc 10 causes that the piston 7 in each cylinder-bore 6 is reciprocating, thereby the volume corresponding to the pressing chamber 91 in the cylinder-bore 6 of this piston 7 is changed.When the Volume Changes of pressing chamber 91, suction, compression and the conveying of cooling gas just take place in succession, therefore, just transfer out the corresponding high pressure cooling gas in angle of inclination of gas flow and swing disc 10.

When an outlet valve 17 was opened, by compression cooling gas was just delivered to exhaust chamber 12 by a corresponding refrigerant outlet hole 16 in pressing chamber 91.Then, hyperbaric chamber 22A under the cooling gas in exhaust chamber 12 flows into by inclined hole 35 and passage 34 and 31.Cooling gas flows into down, and the flow velocity of hyperbaric chamber 22A is subjected to inclined hole 35 and passage 34 and 31 restrictions.

Cooling gas flows into by the baffle plate 50 that has open-work 52 and goes up hyperbaric chamber 22B, and the open-work 52 that forms on the above-mentioned baffle plate 50 is used to limit cooling gas and flows into the flow velocity of going up hyperbaric chamber 22B.Therefore, can significantly reduce the pulsation of refrigeration air-flow in following hyperbaric chamber 22A and the last hyperbaric chamber 22B.

Flow into the refrigeration air-flow impingement baffles 50 of hyperbaric chamber 22A down.As a result, the refrigeration air-flow is decelerated, just contained oil 90 drips and accumulate in the bottom in hyperbaric chamber 22, shown in Fig. 2 and 3 because cooling gas is separated from cooling gas with oily 90 difference of specific gravity in the cooling gas.

And, owing to flow into the upward inner wall surface 60a of the refrigeration airflow strikes lid 60 of hyperbaric chamber 22B, the refrigeration air-flow is slowed down, and oil is separated from cooling gas by open-work 52.These oil of separating also accumulate in the bottom in hyperbaric chamber 22 after dripping by open-work 52.

Pressure in the crankcase 8 is lower than the pressure in the hyperbaric chamber 22, so the oil 90 that accumulates in 22 bottoms, hyperbaric chamber just flows in the crankcase 8 by the communication channel 32 that has aperture 83, and delivers to thrust bearing 45, radial bearing 48 etc. and locate.

According to first embodiment, because separate and accumulate in the oil 90 of 22 bottoms, hyperbaric chamber is back in the crankcase 8 by the communication channel 32 that has aperture 83 from cooling gas by baffle plate 50, so increased the oil mass that infeeds crankcase 8, this has just guaranteed the sufficient fuel feeding 90 to thrust bearing 45, radial bearing 48 etc., thereby prevent bearing 45 and 48 seizes, even compressor is under the operating mode (at this moment, the cooling gas flow velocity is little) of the high speed low-load of quantity delivered minimum, also is like this.And, owing to hyperbaric chamber 22 is separated in two by baffle plate 50, so can further reduce the pulsation of refrigeration air-flow.Moreover also the baffle plate 50 as sealing gasket has the carinate protuberance 51 that is used for sealed high pressure chamber 22, thus can save seal ring used in the prior art 153, thereby also just do not need to process the operation of the groove that matches with seal ring 153.

Fig. 6 illustrates the enlarged view of major component of the remodeling of first embodiment's Wobble plate compressor.Represent with identical label with the corresponding component of the foregoing description, and no longer be illustrated.

In the compressor of this remodeling, passage 132A makes an aperture as throttle orifice.No longer need to process the aperture that passes sealing gasket 180 183, so the internal diameter of aperture 183 is greater than the internal diameter of passage 132A as throttle orifice.

Above-mentioned remodeling compression function obtains and the same effect of above-mentioned first embodiment.

Fig. 7 illustrates the enlarged view according to the major component of the Wobble plate compressor of first embodiment's another kind remodeling.Represent with identical label with corresponding component in the compressor of the foregoing description, and no longer be illustrated.

In the compressor of this remodeling, passage 132B by one with respect to the axis tilt of transmission shaft 5 pass before cylinder head 40 peripheral wall, be positioned at as the path inclined hole 84 of a throttle orifice and one before after the cylinder head 4 on the side wall, be used to be communicated with the aperture 183 that passes sealing gasket 180 and form with the hole 85 of above-mentioned inclined hole 84.

This remodeling compressor also has the effect same with first embodiment, and, compare with first embodiment, owing in this remodeling compressor, be provided with the inclined hole that has suitable angle of inclination with respect to the axis of transmission shaft 5, so might be lubricated to radial bearing in the crankcase 8 48 and a large amount of oil of thrust bearing 45 supplies, this has just further improved the lubricating efficiency of compressor.

Fig. 8 illustrates the enlarged view of the Wobble plate compressor major component of second embodiment of the invention, represents it with the corresponding component of first embodiment's compressor with identical label, and no longer is illustrated.

As shown in Figure 8, in a second embodiment, on the outer circle wall of preceding cylinder head 204, be provided with a passage 32C along the axis (not shown) direction of transmission shaft in other words vertically, so that be connected with passage 32A by the open-work 283 that penetrates sealing gasket 180.And, on the inner peripheral wall of preceding cylinder head 4, be provided with the throttle orifice 86 of an inclination, be connected between the front end that this hole 86 makes passage 32C and the crankcase 8, so that to desired area fuel feeding 90 in the crankcase 8.

Near thrust bearing 45 (see figure 2)s and radial bearing, the throttle orifice 86 of inclination is set according to the mode of the axial direction that departs from transmission shaft 5, this structure can make oil 90 be easy to sneak into the rotation of crankcase 8 internal cause power wheel hubs 42 grades and in the cooling gas that the forms stream, thereby stiffening element is lubricated.

In the compressor of said structure, the inner wall surface of the refrigeration airflow strikes exhaust chamber 12 of input exhaust chamber 12, thus air-flow is slowed down.Cooling gas in the exhaust chamber 12 contains the oil that some is separated from itself, these gases flow into hyperbaric chamber 22 then, cooling gas is proceeded oil and is separated in second hyperbaric chamber 22, flow out compressor by relief opening 23 then and enter in the condenser (not shown).

The oil of separating the cooling gas in hyperbaric chamber 22 90 is delivered in the crankcase 8 by the communication channel of being made up of passage 32A and 32C and inclined hole 85.

This second embodiment has the effect same with first embodiment.

And, Wobble plate compressor according to second embodiment, the oil 90 that cooling gas from the hyperbaric chamber in 22 are separated can be fed to crankcase 8 by near the inclined holes 85 that are positioned at thrust bearing 45 and the radial bearing 48, this has just guaranteed that thrust bearing 45,46, radial bearing 47,48 etc. can be cooled off fully and lubricate, thereby preventing these burning in of bearing, also is like this even compressor is under the operating mode (this moment cooling gas flow velocity low) of the minimum high speed low-load of quantity delivered.

Especially, when compressor was worked under the operating mode of high speed low-load, thrust bearing 45 will bear a big load, so present embodiment is in that to prevent that thrust bearing 45 from taking place aspect the seizes more more effective than first embodiment.

Though in above-mentioned two embodiments, baffle plate 50 has the whole middle body that the open-work 52 that flows through for cooling gas is set,, this is not restrictive, but can only require that baffle plate 50 has an open-work at least.

In addition, though the situation that the present invention is used for Wobble plate compressor is described in the above-described embodiments,, this is not restrictive, but the present invention can be used for other various types of refrigeration compressors.

Persons skilled in the art can be clearer, and recited above is most preferred embodiment of the present invention, can carry out various changes and remodeling under the situation that does not deviate from the spirit and scope of the present invention.

Claims (14)

1. a refrigeration compressor contains: a cylinder block; A valve disc; First cylinder head on end face that is fixed on above-mentioned cylinder block by this valve disc; Second cylinder head on another end face that is fixed on above-mentioned cylinder block; First hyperbaric chamber that is arranged in above-mentioned first cylinder head, the high pressure cooling gas is fed in this first hyperbaric chamber from the pressing chamber in the above-mentioned cylinder block; A crankcase that is arranged in above-mentioned second cylinder head; One is arranged in the above-mentioned cylinder block and second hyperbaric chamber that is communicated with above-mentioned first hyperbaric chamber; With a relief opening, the above-mentioned high pressure cooling gas in above-mentioned second hyperbaric chamber is discharged outside the above-mentioned compressor by this relief opening.

It is characterized in that above-mentioned compressor also comprises:

One is used for separating fuel-displaced oily separation member from the above-mentioned high pressure cooling gas that flows in above-mentioned second hyperbaric chamber; With

Isolated oil flows through and infeeds communication channel in the above-mentioned crankcase the above-mentioned above-mentioned pressurized gas in above-mentioned second hyperbaric chamber of confession.

2. according to the refrigeration compressor of claim 1, it is characterized in that, the second above-mentioned hyperbaric chamber is contained one at the groove that forms on the external peripheral surface of above-mentioned cylinder block and a lid that is fixed on this slot opening edge, above-mentioned oily separation member be one contain at least one pass its open-work and be inserted in above-mentioned groove and above-mentioned lid between plate.

3. according to the refrigeration compressor of claim 2, it is characterized in that above-mentioned communication channel has a throttle mechanism.

4. according to the refrigeration compressor of claim 3, it is characterized in that, it contains one and is inserted in above-mentioned another end face of above-mentioned cylinder block and the sealing gasket between above-mentioned second cylinder head, its feature is that also above-mentioned communication channel contains the first passage and the open-work that passes above-mentioned sealing gasket that extend to above-mentioned another end face of above-mentioned cylinder block from the second above-mentioned hyperbaric chamber.

5. according to the refrigeration compressor of claim 4, it is characterized in that above-mentioned open-work is a throttle orifice, and constitute above-mentioned throttle mechanism by this throttle orifice.

6. according to the refrigeration compressor of claim 4, it is characterized in that above-mentioned first passage is a path open-work, and constitute above-mentioned throttle mechanism by this path open-work.

7. according to the refrigeration compressor of claim 3, it is characterized in that, it contains one and is inserted in the above-mentioned other end of above-mentioned cylinder block and the sealing gasket between above-mentioned second cylinder head, its feature is that also above-mentioned communication channel contains: a first passage that extends to the above-mentioned other end of above-mentioned cylinder block from above-mentioned second hyperbaric chamber; First open-work that passes above-mentioned sealing gasket; A second channel that passes the peripheral wall of above-mentioned second cylinder head, described peripheral wall has formed above-mentioned crankcase; Pass second open-work that above-mentioned peripheral wall extends to above-mentioned crankcase with one from above-mentioned second channel.

8. according to the refrigeration compressor of claim 7, it is characterized in that the second above-mentioned open-work is a kind of path hole, and constitute above-mentioned throttle mechanism by this path hole.

9. refrigeration compressor according to Claim 8 is characterized in that, it contains a transmission shaft that passes above-mentioned crankcase, and its feature also is, above-mentioned path hole with respect to the axis tilt of above-mentioned transmission shaft pass above-mentioned peripheral wall.

10. refrigeration compressor according to Claim 8, it is characterized in that, it contains a transmission shaft that passes above-mentioned crankcase, with a rotating component that is installed on this transmission shaft, this rotating component contains at least one bearing, its feature also is, above-mentioned second channel passes above-mentioned peripheral wall and extends to a roughly corresponding position, position with above-mentioned at least one bearing.

11. the refrigeration compressor according to claim 10 is characterized in that, above-mentioned path hole is communicated with above-mentioned crankcase at the position of the sense of rotation that departs from above-mentioned rotating component.

12. the refrigeration compressor according to claim 3 is characterized in that, above-mentioned at least one open-work on the above-mentioned plate is arranged on above-mentioned plate facing to the hole on the whole position of the above-mentioned opening of above-mentioned groove.

13. the refrigeration compressor according to claim 3 is characterized in that, above-mentioned plate has a carinate protuberance on its annular position relative with the above-mentioned edge of the opening of above-mentioned groove.

14. the refrigeration compressor according to claim 12 is characterized in that, above-mentioned plate has a carinate protuberance on its annular position relative with the edge of the opening of above-mentioned groove.

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