JP2014118923A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor which can reduce the number of part items and an installation space of an oil component separation mechanism.SOLUTION: The compressor comprises: a housing for accommodating a compression mechanism which compresses a refrigerant gas including a lubricant by sucking it therein, and has a suction chamber 35 and a discharge chamber 36; a valve plate 32 having a discharge port 39; a discharge valve 41; a retainer forming plate 42 fixed to the valve plate 32 in the discharge chamber 36 and having a retainer 43; an oil component separation mechanism for separating the lubricant from the discharged refrigerant gas; and a discharge port communicating with the discharge chamber 36. The oil component separation mechanism has: a fastening member for fixing the retainer forming plate 42 to the valve plate 32; an annular partitioning wall 56 surrounding the circumference of a discharge-side region located at the discharge chamber 36 side of the fastening member; an oil component separation space 57 which is partitioned from the discharge chamber 36 by the retainer forming plate 42 and the annular partitioning wall 56, and communicates with the discharge port 51; and a communication passage 58 for making the discharge chamber 36 and the oil component separation space 57 communicate with each other.

Description

  The present invention relates to a compressor, and more particularly to a compressor having an oil separation mechanism for separating lubricating oil contained in a refrigerant.

As a conventional compressor, for example, a compressor disclosed in Patent Document 1 is known.
The compressor includes a compression mechanism that sucks and compresses gas containing lubricating oil, a discharge chamber that communicates with the compression mechanism, a housing that houses the compression mechanism and the discharge chamber and has a discharge port, a discharge chamber, and a discharge port. And a centrifuge for separating the lubricating oil from the gas.
A centrifugal separator for a compressor in Patent Document 1 includes a slit formed in a discharge chamber surrounding wall, an inner cylinder and an outer cylinder, and an annular lubricating oil separation chamber formed between the inner cylinder and the outer cylinder. And a cylinder whose one end is closed.
An opening that is directed tangentially to the lubricating oil separation chamber is formed in the outer cylinder of the cylindrical body, and the cylindrical end portion on the closed end side of the lubricating oil separation chamber is directed downstream with respect to the gas flow. And is press-fitted and fixed in the communication passage.
The outer cylinder extends from the discharge chamber surrounding wall with a gap and along the slit, the gap communicates with the inner cylinder, the opening formed in the outer cylinder faces a part of the slit, and the inner cylinder It communicates with the separation chamber and the discharge port.

  According to the compressor disclosed in Patent Document 1, since the lubricating oil is separated from the gas not only by a centrifugal force but also by a collision, the lubricating oil separation function is improved as compared with a compressor that performs only the centrifugal separation. Yes.

JP 2004-293543 A

  However, in the compressor disclosed in Patent Document 1, the inner cylinder and the outer cylinder included in the centrifugal separator are dedicated parts for centrifugal separation of the lubricating oil, which increases the number of parts of the compressor and increases the number of parts in the housing. However, there is a problem that an installation space for the inner cylinder and the outer cylinder is required.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a compressor capable of reducing the number of parts and the installation space for an oil separation mechanism.

  In order to solve the above problems, the present invention provides a compression mechanism that sucks and compresses a refrigerant gas containing lubricating oil, a housing including a suction chamber and a discharge chamber, and a housing formed in the housing, A discharge port that communicates, a valve plate that includes a discharge port that communicates the compression mechanism and the discharge chamber, a reed discharge valve that opens and closes the discharge port, and is fixed to the valve plate in the discharge chamber, A compressor including a retainer forming plate having a retainer that regulates the curvature of a discharge valve, and an oil separation mechanism that is installed in the housing and separates lubricating oil from refrigerant gas discharged from the discharge chamber. The discharge chamber is formed on the center side of the housing, the suction chamber is formed on the outer peripheral side of the discharge chamber in the housing, and the oil separation mechanism fixes the retainer forming plate to the valve plate. That a fastening member, is formed in the housing, characterized in that it is constituted by an annular partition walls forming an oil separation space portion surrounds the fastening member in the ejection chamber.

In the present invention, the refrigerant gas containing the lubricating oil discharged into the discharge chamber is introduced into the oil separation space, flows around the discharge side portion of the fastening member along the annular partition, and becomes the refrigerant gas in the oil separation space. The contained lubricating oil is separated.
The refrigerant gas from which the lubricating oil is separated may be introduced into the discharge port, and the separated lubricating oil may be returned to the suction chamber.
According to the present invention, the retainer forming plate and the discharge side portion of the fastening member can function as a part of the oil separation mechanism, so that the number of parts can be reduced and the installation space for the oil separation mechanism can be reduced.

In the above compressor, the fastening member surrounded by the annular partition may be formed in a polygonal column.
In this case, since the discharge side portion of the fastening member is a polygonal column, the refrigerant gas collides with the corner portion of the discharge portion, and the effect of this collision promotes the separation of the lubricating oil from the refrigerant gas.
As a result, the lubricating oil can be efficiently separated from the refrigerant gas.

Further, in the above-described compressor, the annular partition is provided with a communication path that connects the inner periphery and the outer periphery of the annular partition, and the communication path is provided at an end portion of the annular partition on the retainer forming plate side. It is good also as a structure which is a through-hole provided in the recessed groove formed and / or the said annular partition.
In this case, since the refrigerant gas containing the lubricating oil in the discharge chamber passes through the communication path, introduction of the refrigerant gas containing the lubricating oil into the oil separation space is further promoted, and the lubricating oil is more efficiently used in the oil separation space. Can be separated.
Moreover, when the refrigerant gas containing the lubricating oil in the discharge chamber passes through the communication path, a flow of the refrigerant gas in the radial direction with respect to the oil separation space can be generated, and the oil separation capability is improved.

Further, in the above compressor, an inner wall surface of the annular partition wall is formed by a circumferential surface, and the communication path is tangent to the circumferential surface so as to promote the swirling of the refrigerant gas in the oil separation space. It is good also as a structure currently formed so that the said refrigerant | coolant gas may be guide | induced to the said oil separation space part from a direction.
In this case, since the refrigerant gas containing the lubricating oil in the discharge chamber passes through the communication path, a flow of the refrigerant gas in one direction around the fastening member of the oil separation space is formed. Lubricating oil can be more efficiently separated.

In the compressor, the retainer forming plate and the annular partition may be separated from each other.
In this case, there is no physical influence on the retainer forming plate or the retainer such as the annular partition wall pressing the retainer forming plate. For this reason, an offset load does not act on the retainer forming plate, the retainer posture is maintained appropriately, and the curvature of the discharge valve can be appropriately regulated by the retainer, and the airtightness between the housing and the valve plate is prevented from being lowered. Can do.

  ADVANTAGE OF THE INVENTION According to this invention, the compressor which can reduce the number of parts and the installation space of an oil separation mechanism can be provided.

1 is a longitudinal sectional view of a variable capacity swash plate compressor according to a first embodiment. It is an AA arrow directional view in FIG. It is an enlarged view which expands and shows the principal part of a variable capacity | capacitance type swash plate type compressor. FIG. 3 is an enlarged vertical cross-sectional view of an essential part of FIG. 2. It is an enlarged vertical sectional view showing an enlarged main part of a variable capacity swash plate compressor according to a second embodiment.

(First embodiment)
Hereinafter, a variable capacity swash plate compressor as a compressor according to a first embodiment will be described with reference to the drawings.
A variable capacity swash plate compressor (hereinafter referred to as “compressor”) shown in FIG. 1 is a vehicle air-conditioning compressor mounted on a vehicle.
In FIG. 1, the left side is the front and the right side is the rear.

In the compressor shown in FIG. 1, a front housing 12 is joined to the front end of the cylinder block 11, and a rear housing 13 is joined to the rear end of the cylinder block 11.
The cylinder block 11, the front housing 12 and the rear housing 13 are connected to each other by a plurality of through bolts (only one is shown in FIG. 1) 14.
The cylinder block 11 is formed with bolt through holes (not shown) through which the through bolts 14 are inserted, and the front housing 12 is formed with bolt through holes 15.
The rear housing 13 is formed with a bolt hole (not shown) having a female screw, and the male screw portion of the through bolt 14 is screwed into the bolt hole.
The cylinder block 11, the front housing 12, and the rear housing 13 are elements constituting the entire housing of the compressor.

A control pressure chamber 16 is formed in the front housing 12 by joining the front housing 12 and the cylinder block 11.
A shaft hole 17 is formed in the cylinder block 11.
A drive shaft 18 is inserted through the shaft hole 17, and the drive shaft 18 is rotatably supported by the cylinder block 11 via a radial bearing 19.
A shaft hole 20 is formed in the front housing 12, and a drive shaft 18 is inserted through the shaft hole 20.
The drive shaft 18 is rotatably supported by the front housing 12 via a radial bearing 21.

A shaft sealing device 22 is provided in the shaft hole 20, and a lip seal mainly made of a rubber material is used for the shaft sealing device 22.
The shaft seal device 22 has a function of preventing leakage of refrigerant gas and lubricating oil from the shaft hole 20.
The drive shaft 18 is operatively connected to an engine 23 as an external drive source mounted on the vehicle, and is rotationally driven by receiving power transmission from the engine 23.
The compressor of this embodiment employs a configuration in which the power of the engine 23 is always transmitted to the drive shaft 18, and is a clutchless type compressor.
In this embodiment, a clutchless type compressor is used, but a compressor that receives power transmission from an external drive source via a clutch may be used.

A rotation support 24 is fixed to the drive shaft 18, and the rotation support 24 can rotate integrally with the drive shaft 18.
A thrust bearing 25 that receives a load in the axial direction of the drive shaft 18 is interposed between the rotary support 24 and the inner wall surface of the front housing 12.
A swash plate 26 is supported on the rotary support 24.
The swash plate 26 is fitted to the drive shaft 18 at a set inclination angle, is tiltable in the axial direction of the drive shaft 18, and is supported so as to be slidable in the axial direction with respect to the drive shaft 18. Yes.
A hinge mechanism 27 is interposed between the rotary support 24 and the swash plate 26.
The hinge mechanism 27 allows the swash plate 26 to tilt with respect to the rotary support 24 and connects the drive shaft 18 to the swash plate 26 so that torque can be transmitted.

The cylinder block 11 is formed with a plurality of cylinder bores 28 (only two are shown in FIG. 1).
A single-headed piston 29 is accommodated in each cylinder bore 28 so as to be capable of reciprocating.
Each piston 29 is anchored to the outer periphery of the swash plate 26 via a shoe 30.
Between the cylinder block 11 and the rear housing 13, a suction valve forming plate 31, a valve plate 32 and a discharge valve forming plate 33 are interposed.
A compression chamber 34 surrounded by a piston 29 and a valve plate 32 is defined on the back side of the cylinder bore 28 (rear side in FIG. 1).
In the present embodiment, the rotary support 24, the swash plate 26, the hinge mechanism 27, the cylinder bore 28, the piston 29, and the compression chamber 34 mainly constitute a compression mechanism.

A suction valve forming plate 31, a valve plate 32 and a discharge valve forming plate 33 are interposed between the cylinder block 11 and the rear housing 13, so that a suction chamber 35 and a discharge chamber 36 are formed inside the rear housing 13. A compartment is formed.
The discharge chamber 36 is formed on the center side of the rear housing 13, and the suction chamber 35 is formed on the outer peripheral side of the discharge chamber 36 in the rear housing 13.
As shown in FIGS. 1 and 2, a partition wall 37 formed in the rear housing 13 separates the suction chamber 35 and the discharge chamber 36.

The valve plate 32 is formed with a suction port 38 that communicates the suction chamber 35 and the compression chamber 34, and a discharge port 39 that communicates the discharge chamber 36 and the compression chamber 34.
The suction port 38 and the discharge port 39 are respectively formed corresponding to the number of cylinder bores 28.
The suction valve forming plate 31 is formed with suction valves 40 that open and close the suction ports 38, and the suction valves 40 are formed corresponding to the number of suction ports 38.
The discharge valve forming plate 33 is formed with discharge valves 41 for opening and closing the discharge ports 39, and the discharge valves 41 are formed corresponding to the number of discharge ports 39.
The suction valve 40 and the discharge valve 41 are lead type on-off valves that can be bent by elastic deformation.

As shown in FIGS. 1 and 3, a retainer forming plate 42 is fixed to the valve plate 32 by bolts 44 and nuts 45 as fastening members in the discharge chamber 36 on the rear housing side of the discharge valve forming plate 33. .
As shown in FIGS. 2 and 4, the retainer forming plate 42 includes a plurality of retainers 43 corresponding to the number of discharge valves 41.
The retainer 43 regulates the curvature of the discharge valve 41 and regulates the maximum opening degree of the discharge valve 41.
2 and 4, the retainer forming plate 42 is indicated by a virtual line for convenience of explanation.

As shown in FIG. 3, the bolt 44 is a hexagonal bolt having a hexagonal column head 46 and a shaft portion 47 having a male screw, and the nut 45 is a hexagonal hexagonal nut having a female screw corresponding to the male screw of the bolt 44. It is.
In the present embodiment, the head portion 46 of the bolt 44 is located on the rear housing 13 side, and the shaft portion 47 having a male screw penetrates the retainer forming plate 42, the discharge valve forming plate 33, the valve plate 32, and the suction valve forming plate 31. Thus, it reaches the cylinder block 11 side.
In the present embodiment, the head portion 46 of the bolt 44 corresponds to the discharge side portion of the fastening member located on the rear housing 13 side.
A nut 45 is fastened to the shaft portion 47, and the retainer forming plate 42 is fixed to the valve plate 32 by fastening the bolt 44 and the nut 45.

As shown in FIG. 1, the rear housing 13 is formed with a suction port 49 connected to the external refrigerant circuit 48, and the suction port 49 and the suction chamber 35 are communicated with each other through a suction passage 50.
A discharge port 51 connected to the external refrigerant circuit 48 is formed in the rear housing 13, and the discharge port 51 and the discharge chamber 36 are communicated with each other by a discharge passage 52.

The refrigerant circuit (refrigeration cycle) of the vehicle air conditioner includes a compressor as a part of the refrigerant circuit, and an external refrigerant circuit 48 connected to the discharge chamber 36 and the suction chamber 35 of the compressor.
For example, carbon dioxide or chlorofluorocarbon is used as the refrigerant.
The external refrigerant circuit 48 includes a heat exchanger 53, an expansion valve 54, and a heat exchanger 55 in order from the discharge chamber 36 side.

As shown in FIGS. 2 to 4, the rear housing 13 is formed with an annular partition wall 56 in addition to the partition wall 37.
The annular partition wall 56 is a cylindrical partition wall that surrounds the head 46 of the bolt 44 and protrudes toward the retainer forming plate 42 side.
An oil separation space 57 is defined by the retainer forming plate 42 and the annular partition 56 so as to be separated from the discharge chamber 36.
The annular partition 56 surrounds the head 46 of the bolt 44 in the discharge chamber 36 to form an oil separation space 57.
The inner wall surface of the annular partition wall 56 is formed by a circumferential surface centering on the axis P of the bolt so that the refrigerant gas easily turns along the annular partition wall 56 in the oil separation space 57.
As shown in FIG. 3, the tip of the annular partition wall 56 is close to the retainer forming plate 42 but does not contact the retainer forming plate 42.
That is, the retainer forming plate 42 and the annular partition wall 56 are separated from each other.
The reason why the retainer forming plate 42 and the annular partition 56 are separated from each other is not to allow the refrigerant gas to pass through the oil separation space 57 but to the retainer forming plate 42 and the retainer 43 due to the contact between the annular partition 56 and the retainer forming plate 42. This is to avoid physical influences.

The annular partition wall 56 is formed with four communication passages 58 that connect the discharge chamber 36 and the oil separation space 57.
The communication path 58 of the present embodiment is configured by a concave groove that is recessed at the end of the annular partition wall 56 on the retainer forming plate 42 side, and communicates the inner periphery and the outer periphery of the annular partition wall 56.
In the present embodiment, the communication passage 58 is formed in a tangential direction with respect to the inner wall surface of the annular partition wall 56.
Each communication path 58 is formed in the annular partition wall 56 so that the refrigerant gas can easily turn in one direction along the annular partition wall 56 in the oil separation space 57.
The oil separation space 57 communicates with the discharge port 51, and a check valve 59 that prevents the backflow of the refrigerant gas from the discharge port 51 is provided in the discharge passage 52 between the oil separation space 57 and the discharge port 51. Is provided.

In the present embodiment, the head portion 46 of the bolt 44 is located in the oil separation space 57, and the refrigerant gas introduced by the communication passage 58 turns around the head portion 46 of the bolt 44 in one direction. The oil separation space 57 is formed so as to flow toward the check valve 59 and then toward the check valve 59.
Thus, in the present embodiment, the retainer forming plate 42, the head portion 46 of the bolt 44, the annular partition wall 56, the communication passage 58, and the oil separation space 57 constitute an oil separation mechanism, and the refrigerant is separated in the oil separation space 57. Lubricating oil contained in the gas is separated.

By the way, the cylinder block 11 is formed with an extraction passage (not shown) for communicating the control pressure chamber 16 and the suction chamber 35.
The extraction passage is a passage for discharging the refrigerant gas in the control pressure chamber 16 to the suction chamber 35.
In the present embodiment, an air supply passage 60 that communicates between the oil separation space 57 and the control pressure chamber 16 is formed across the cylinder block 11 and the rear housing 13.
The supply passage 60 is a passage for supplying refrigerant gas having a discharge pressure to the control pressure chamber 16.
In the rear housing 13, a capacity control valve 61 is disposed in the supply passage 60.
The air supply passage 60 that connects the oil separation space 57 and the control pressure chamber 16 not only supplies the refrigerant gas at the discharge pressure to the control pressure chamber 16 but also supplies the lubricating oil separated in the oil separation space 57. It also functions as an oil passage that supplies the control pressure chamber 16.

By adjusting the opening of the capacity control valve 61, the amount of high-pressure refrigerant gas introduced into the control pressure chamber 16 through the air supply passage 60 and the refrigerant derived from the control pressure chamber 16 through the extraction passage The balance with the derived amount of gas is controlled, and the pressure in the control pressure chamber 16 is determined.
In accordance with the pressure in the control pressure chamber 16, the difference from the pressure in the cylinder bore 28 via the piston 29 is changed, and the inclination angle of the swash plate 26 with respect to the drive shaft 18 is changed.
As a result, the compressor can change the stroke of the piston 29, that is, the discharge capacity of the refrigerant gas.

A swash plate 26 shown by a two-dot chain line in FIG.
A swash plate 26 shown by a solid line in FIG. 1 shows a state of a minimum inclination angle.

Next, the operation of the compressor according to the embodiment of the present invention will be described.
Based on the reciprocating motion of the piston 29 accompanying the rotational motion of the drive shaft 18, the refrigerant gas in the suction chamber 35 is guided from the suction port of the valve plate 32 into the cylinder bore 28 by opening the suction valve 40.
The refrigerant gas introduced into the cylinder bore 28 is compressed and discharged to the discharge chamber 36 by opening the discharge valve 41.

During the operation of the compressor, the opening degree of the capacity control valve 61 is changed, so that the amount of refrigerant gas introduced from the discharge chamber 36 to the control pressure chamber 16 and the control pressure chamber 16 through the extraction passage to the suction chamber 35 are changed. The balance with the derived amount of refrigerant gas is controlled.
By controlling the balance between the amount of refrigerant gas introduced into the control pressure chamber 16 and the amount of refrigerant gas derived from the control pressure chamber 16, the pressure in the control pressure chamber 16 is determined.
When the opening of the capacity control valve 61 is changed and the pressure in the control pressure chamber 16 is changed, the pressure difference between the control pressure chamber 16 and the cylinder bore 28 via the piston 29 is changed, and the inclination angle of the swash plate 26 is changed. To do.
The stroke of the piston 29 is changed by changing the inclination angle of the swash plate 26, and the discharge capacity of the compressor is changed in accordance with the change of the stroke of the piston 29.

For example, when the pressure in the control pressure chamber 16 is lowered, the inclination angle of the swash plate 26 with respect to the plane perpendicular to the axial direction of the drive shaft 18 increases, and the stroke of the piston 29 increases.
As the stroke of the piston 29 increases, the discharge capacity of the compressor increases.
Conversely, when the pressure in the control pressure chamber 16 is increased, the inclination angle of the swash plate 26 decreases, the stroke of the piston 29 decreases, and the discharge capacity decreases.

By the way, during operation of the compressor, the refrigerant gas discharged into the discharge chamber 36 contains mist-like lubricating oil.
The oil separation mechanism of the compressor in the present embodiment separates the lubricating oil from the refrigerant gas at the discharge pressure in the oil separation space 57.
The refrigerant gas discharged into the discharge chamber 36 passes through the four communication paths 58, and the flow of the refrigerant gas passing through the communication path 58 becomes a flow toward the tangential direction of the inner wall surface of the annular partition wall 56 in the oil separation space 57. be introduced.
The refrigerant gas introduced into the oil separation space 57 turns around the head 46 of the bolt 44 in one direction along the inner wall surface of the annular partition wall 56 in the oil separation space 57.
Thereafter, the refrigerant gas is introduced from the oil separation space 57 to the check valve 59 and transferred from the discharge port 51 to the external refrigerant circuit 48 through the discharge passage 52 from the check valve 59.

When the refrigerant gas containing mist-like lubricating oil turns around the head portion 46 of the bolt 44 in the oil separation space 57, the refrigerant gas flows along the inner wall surface of the annular partition wall 56 and the outer peripheral surface of the head portion 46 of the bolt 44. The lubricating oil is separated from the refrigerant gas by the effect of centrifugation.
In addition, the refrigerant gas containing the lubricating oil collides with the corner of the head 46 of the bolt 44 in the oil separation space 57, and the separation of the lubricating oil is promoted by the effect of this collision.
The lubricating oil separated by the oil separation mechanism passes through the air supply passage 60 and is supplied to the control pressure chamber 16 via the capacity control valve 61.

The compressor according to the present embodiment has the following effects.
(1) Since the retainer forming plate 42 and the head portion 46 of the bolt 44 can function as part of the oil separation mechanism, an additional member for the oil separation mechanism is not required, and the number of parts can be reduced. it can. Further, the installation space for the oil separation mechanism in the rear housing 13 can be reduced. In particular, the size of the rear housing 13 in the front-rear direction (axial direction of the drive shaft) can be set small.
(2) Since the head 46 of the bolt 44 located in the oil separation space 57 is a hexagonal column, the refrigerant gas collides with a corner of the head 46 of the bolt 44 and is included in the refrigerant gas due to the effect of this collision. The separation of the lubricating oil is promoted. As a result, the lubricating oil can be efficiently separated from the refrigerant gas.

(3) Since the refrigerant gas containing the lubricating oil in the discharge chamber 36 passes through the communication path 58, the introduction of the refrigerant gas containing the lubricating oil into the oil separation space 57 is further promoted, and the lubricating oil is generated in the oil separation space 57. Can be separated more efficiently. Further, since the communication direction of the communication passage 58 coincides with the tangential direction of the inner peripheral surface of the annular partition wall 56, a refrigerant gas flow in one direction in the oil separation space portion 57 is formed. Thus, the lubricating oil can be separated more efficiently.
(4) Since the annular partition wall 56 is not in contact with the retainer forming plate 42, there is no physical influence on the retainer forming plate 42 and the retainer 43 such that the annular partition wall 56 presses the retainer forming plate 42. For this reason, an unbalanced load does not act on the retainer forming plate 42, and the retainer 43 can be kept in a proper posture and the bend of the discharge valve 41 can be appropriately regulated by the retainer 43. Further, when the housings are fastened by the through bolts 14, the fastening force of the through bolts 14 is not transmitted to the annular partition wall 56 and the retainer forming plate 42, so that the airtightness between the rear housing 13 and the valve plate 32 is reduced. And the valve plate 32 can be prevented from being deteriorated in airtightness.

(5) The air supply passage 60 communicating the oil separation space 57 and the control pressure chamber 16 can function as an oil passage in addition to supplying the refrigerant gas to the control pressure chamber 16. In the compressor, a series of oil circulation circuits including the discharge chamber 36, the oil separation space 57, the air supply passage 60, the control pressure chamber 16, the suction chamber 35, and the compression chamber 34 can be configured. Further, in order to separate the lubricating oil from the refrigerant gas at the discharge pressure, the refrigerant gas after the separation of the lubricating oil is transferred to the external refrigerant circuit 48, thereby effectively preventing a reduction in heat exchange efficiency in the external refrigerant circuit 48 due to the lubricating oil. can do.

(Second Embodiment)
Next, a compressor according to the second embodiment will be described.
The compressor of the present embodiment is a variable capacity swash plate compressor (hereinafter referred to as “compressor”), and is a vehicle air-conditioning compressor mounted on a vehicle.
In this embodiment, it differs from 1st Embodiment by the point which installed the nut in the oil separation space part in a compressor.
Since the basic configuration of the compressor according to the present embodiment is the same as that of the first embodiment, the description of the first embodiment is used and common reference numerals are used.

As shown in FIG. 5, in this embodiment, the retainer forming plate 42 is fixed to the valve plate 32 by bolts 44 and nuts 45.
In this embodiment, the shaft portion 47 of the bolt 44 penetrates the suction valve forming plate 31, the valve plate 32, the discharge valve forming plate 33, and the retainer forming plate 42 from the cylinder block 11 side, and the tip of the shaft portion 47 is the oil separation space portion. Projects to 57.
A nut 45 is fastened to the tip of the shaft portion 47 protruding into the oil separation space portion 57, and the tip portion of the shaft portion 47 slightly protrudes from the nut 45.
Therefore, in this embodiment, the discharge side portion of the fastening member is mainly the nut 45.
The oil separation mechanism according to the present embodiment includes the retainer forming plate 42, the nut 45, the annular partition wall 56, the communication path 58, and the oil separation space 57.
The oil separation mechanism separates the lubricating oil contained in the refrigerant gas in the oil separation space 57.
The compressor of this embodiment has the same effects as the effects of the first embodiment and (1) to (5).

  The above embodiment shows an embodiment of the present invention, and the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the invention as described below. Is possible.

In the above embodiment, a hexagonal bolt or a hexagonal nut is used as the fastening member. However, the fastening member may be a bolt having a polygonal column head other than a hexagon or a polygonal column nut.
In the above embodiment, the annular partition provided with four communication paths is illustrated, but the number of communication paths formed in the annular partition is not particularly limited. For example, one or more communication paths may be provided, or three communication paths may be provided or five may be provided.
In the above embodiment, a 6-cylinder compressor is illustrated, but the number of cylinders of the compressor is not particularly limited. Further, the compressor is not limited to a variable displacement swash plate compressor, but may be a fixed displacement swash plate compressor or a wobble variable displacement compressor. Further, the compressor is not limited to a compressor for vehicle air conditioning.
○ In the above embodiment, a check valve is provided downstream of the oil separation mechanism in the refrigerant gas flow path of the rear housing, but it is not essential to provide the check valve in the rear housing, and the check valve is omitted. The compressor of the structure to be used may be sufficient.
○ In the above embodiment, the communication direction of the communication path is configured to coincide with the tangential direction of the circumferential surface. However, the communication path is not limited to this configuration, and at least the refrigerant gas in the discharge chamber can be introduced into the oil separation space. The communication path in which the communication direction that can be easily introduced into the oil separation space is set is preferable.
In the above embodiment, the communication path is configured by the concave groove formed in the end portion of the annular partition wall. For example, a through hole may be provided in the annular partition wall, and the through hole may be used as a communication path. In the case of the communication path by the through hole, the same function as that of the communication path by the concave groove can be achieved.
○ In the above embodiment, bolts and nuts are used as fastening members. However, in addition to the fastening members, washers (flat washers, spring washers, etc.) may be used. It may be a bolt (nut) or a flanged bolt (nut).

11 Cylinder block 12 Front housing 13 Rear housing 16 Control pressure chamber 18 Drive shaft 24 Rotating support 26 Swash plate 27 Hinge mechanism 28 Cylinder bore 29 Piston 32 Valve plate 35 Suction chamber 36 Discharge chamber 38 Suction port 39 Suction port 40 Suction valve 41 Suction Valve 42 Retainer forming plate 43 Retainer 44 Bolt 45 Nut 46 Head 51 Discharge port 56 Annular partition wall 57 Oil separation space 58 Communication path 59 Check valve 61 Capacity control valve P Shaft

Claims (5)

A compression mechanism that sucks and compresses refrigerant gas containing lubricating oil;
A housing with a suction chamber and a discharge chamber;
A discharge port formed in the housing and communicating with the discharge chamber;
A valve plate having a discharge port communicating with the compression mechanism and the discharge chamber;
A reed discharge valve that opens and closes the discharge port;
A retainer forming plate provided with a retainer that is fixed to the valve plate in the discharge chamber and regulates the curvature of the discharge valve;
An oil separation mechanism that is installed in the housing and separates lubricating oil from the refrigerant gas discharged from the discharge chamber,
The discharge chamber is formed on the center side of the housing,
The suction chamber is formed on the outer peripheral side of the discharge chamber in the housing,
The oil separation mechanism is
A fastening member for fixing the retainer forming plate to the valve plate;
A compressor comprising: an annular partition wall formed in the housing and surrounding the fastening member in the discharge chamber to form an oil separation space.   The compressor according to claim 1, wherein the fastening member surrounded by the annular partition is formed in a polygonal column. The annular partition is provided with a communication path that connects the inner periphery and the outer periphery of the annular partition,
3. The compressor according to claim 1, wherein the communication path is a concave groove provided at an end portion of the annular partition wall on a retainer forming plate side and / or a through hole provided in the annular partition wall. . The inner wall surface of the annular partition is formed by a circumferential surface,
The communication path is formed so that the refrigerant gas is guided to the oil separation space portion from a tangential direction of the circumferential surface in order to promote the turning of the refrigerant gas in the oil separation space portion. 4. The compressor according to claim 3, wherein   The compressor according to any one of claims 1 to 4, wherein the retainer forming plate and the annular partition are separated from each other.

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