JP4611079B2 - Compressor - Google Patents

Description

  The present invention relates to a compressor.

  Generally, lubricating oil is used in a compressor applied to an air conditioner or the like in order to smoothly slide its internal mechanism. However, it is known that in order to improve the heat exchange efficiency, it is preferable not to allow the lubricating oil to flow into the heat exchanger because the lubricating oil reduces the heat exchange efficiency in the heat exchanger.

Therefore, various methods have been proposed for separating the lubricating oil from the refrigerant discharged from the compressor and returning the separated lubricating oil to the compressor. Among them, the refrigerant mixed in the refrigerant discharged from the compression mechanism in the compressor is proposed. 2. Description of the Related Art An oil separation chamber that separates lubricating oil is provided in a rear housing (discharge chamber side) (see, for example, Patent Documents 1 and 2).
JP-A-4-153596 JP-A-11-153596

  In the above-mentioned Patent Document 1, a centrifugal oil separation chamber having a gas outlet pipe is provided in the rear housing, and the separated lubricating oil falls in the rear housing and enters an oil reservoir chamber below the rear housing. A stored configuration is disclosed. According to this configuration, the lubricating oil is separated from the refrigerant as the refrigerant containing the lubricating oil flows downward while turning between the oil separation chamber and the gas outlet pipe. The refrigerant from which the lubricating oil has been separated flows upward in the gas outlet pipe and is discharged from the compressor. The separated lubricating oil is stored in the oil reservoir chamber and can be used again for lubricating the compressor.

  However, in the above configuration, the coolant flowing downward while turning may disturb the liquid level of the lubricating oil stored in the oil sump chamber and cause the lubricating oil to scatter. Since the lubricating oil is supplied to the sliding portion of the compressor through an oil supply path in which an opening is formed below the stored oil level, in this case, it becomes difficult to guide the lubricating oil to the sliding portion in the compressor, There was a risk that the durability of the compressor would decrease due to lack of lubricating oil. In addition, the high-pressure refrigerant discharged from the compression mechanism is likely to enter the oil supply path, and the high-pressure refrigerant that has entered may flow into the suction portion or the compression mechanism, and the performance of the compressor may be reduced. .

In addition, as shown in Patent Document 2 described above, a partition member is provided in the rear housing, and a high-pressure refrigerant discharged from the compression mechanism flows in, and a discharge cavity having an oil separation chamber and the separated lubricating oil are stored. There is also known a technique in which an oil reservoir chamber is formed by separating it vertically.
According to this configuration, since the oil separation chamber and the oil reservoir chamber are separately formed in the rear housing, the volume of the discharge cavity is small. When the volume of the discharge cavity is reduced, it is difficult to reduce the discharge pressure pulsation (hereinafter referred to as discharge pulsation) generated by intermittent discharge of the refrigerant from the compression mechanism.

  Furthermore, for example, when the compressor is started from a state where the liquid refrigerant is stored in the discharge cavity under a predetermined condition, the liquid refrigerant is less likely to flow out of the discharge cavity than the gas refrigerant, and is thus an incompressible fluid. There was a risk that the pressure would rise excessively in the discharge cavity, the compression mechanism, and the like. In particular, when the volume of the discharge cavity is small, liquid refrigerant is likely to be stored in the discharge cavity, so that excessive pressure is easily generated in the discharge cavity and the durability of the compressor is lowered.

  The present invention has been made to solve the above problems, and provides a compressor capable of reducing discharge pulsation and preventing excessive pressure generation, durability deterioration, and performance deterioration. For the purpose.

In order to achieve the above object, the present invention provides the following means.
A compressor according to the present invention includes a housing having a space therein, a compression mechanism that is disposed in the housing and compresses a fluid taken in the space, and is disposed in the housing and is discharged from the compression mechanism. A discharge chamber into which the fluid flows, an oil separation portion that is disposed in the discharge chamber and separates the lubricating oil mixed in the fluid discharged from the compression mechanism from the fluid, and is formed separately from the discharge chamber, An oil reservoir chamber that stores the lubricating oil separated by the oil separation chamber, and an oil supply unit that supplies the lubricating oil stored in the oil reservoir chamber to the compression mechanism, A communication path that connects the discharge chamber and the oil reservoir chamber is provided, and the communication path is configured so that a part of the fluid discharged from the compression mechanism flows through the communication path. To do.

  According to the present invention, a part of the volume in the oil reservoir chamber can be used as the discharge chamber by allowing the discharge chamber and the oil reservoir chamber to communicate with each other through the communication passage and allowing a fluid as a gas to flow therethrough. Therefore, a part of the volume in the oil reservoir chamber in addition to the discharge chamber can be used for suppressing the discharge pulsation, and the discharge pulsation can be easily suppressed.

Since the fluid flowing through the communication path is a part of the fluid discharged from the compression mechanism, the flow rate of the fluid flowing into the oil separation unit can be reduced. Therefore, the flow velocity of the fluid flowing into the oil reservoir chamber can be reduced, the oil level of the stored lubricating oil can be made difficult to be disturbed, and the lubricating oil can be prevented from scattering.
In addition, since disturbance of the oil level can be prevented, it is possible to prevent the oil supply unit from inhibiting the intake of the lubricating oil. As a result, the lubricating oil can be stably supplied to the compression mechanism, and the deterioration of the compressor durability can be prevented. In addition, the discharged fluid can be prevented from being taken into the oil supply unit, and the discharged fluid can be prevented from flowing into the compression mechanism or the like. Therefore, it is possible to prevent the performance of the compressor from deteriorating.

Since the discharge chamber and the oil reservoir chamber communicate with each other, for example, when the compressor sucks the liquid fluid liquefied under predetermined conditions, a part of the liquid fluid discharged into the discharge chamber flows into the oil reservoir chamber be able to.
Therefore, the generation of excessive pressure in the compression mechanism or the like caused by the liquid fluid filling the discharge chamber can be delayed, and the liquid fluid can flow out from the discharge chamber to the outside during the delay. This can prevent the deterioration of the durability of the compressor.

Moreover, in the said invention, it is desirable for the said communicating path to communicate with the said oil reservoir chamber above the oil level of the stored lubricating oil.
According to the present invention, since the communication path communicates with the oil reservoir chamber above the oil level of the stored lubricating oil, the oil reservoir chamber is compared with the case where the communication passage communicates within the stored lubricating oil. It is possible to prevent the oil surface from being disturbed by the fluid flowing into the tank.

Furthermore, in the said invention, it is desirable for the said oil reservoir chamber to provide the wall part in the position which interrupts | blocks the flow of the fluid which flows in from the said communicating path.
According to the present invention, since the wall portion is provided at a position that blocks the flow of the fluid flowing in from the communication path, the oil level in the vicinity region can be pushed down and the oil level in other regions can be pushed up. That is, by causing the fluid flowing in from the communication path to collide with the wall portion, the dynamic pressure of the fluid is converted into static pressure, and the oil pressure in the vicinity of the wall portion is pushed down by the static pressure, and the oil surface in other regions Can be pushed up.
Moreover, the area | region where an oil level is pushed up can be formed in the arrangement position of the said oil supply part by arrange | positioning a wall part in a predetermined position.

In the above invention, it is desirable that the communication path is formed between the housing and the compression mechanism.
According to the present invention, the communication path can be formed without increasing the number of processing steps by forming the communication path between the housing and the compression mechanism. That is, when the communication path is formed as a gap between the contact surfaces of the housing and the compression mechanism, for example, the communication path can be easily formed as compared with a method of forming a through hole that connects the discharge chamber and the oil reservoir chamber. it can.

In the said invention, it is desirable that the opening part in the said oil reservoir chamber of the said oil supply part is provided in the position most distant from the oil surface of the said lubricating oil.
According to the present invention, by providing the opening at a position farthest from the oil surface, it is possible to make it difficult for fluid to be taken into the oil supply unit.

In the above invention, it is desirable that the fluid flows into the oil sump chamber from at least two directions.
According to the present invention, the fluid level of the stored lubricating oil can be controlled to a predetermined shape by flowing fluid into the oil reservoir chamber from at least two directions. That is, the oil level in the vicinity area where the fluid flows is pushed down by the fluid, and the oil level in the other areas is pushed up. Therefore, for example, the oil level in the region where the oil supply unit is disposed can be pushed up, and fluid can be prevented from being taken into the oil supply unit.

According to the compressor of the present invention, by forming the communication path, a part of the volume in the oil reservoir chamber can be used in addition to the discharge chamber to suppress the discharge pulsation, and the discharge pulsation can be easily suppressed. There is an effect.
Since a part of the fluid discharged from the compression mechanism is circulated through the communication path, the oil level of the stored lubricating oil can be hardly disturbed, and the lubricating oil can be prevented from scattering. Therefore, the lubricating oil can be stably supplied to the compression mechanism, and the effect that the durability of the compressor can be prevented from being lowered can be achieved. Moreover, since it can prevent that the said discharged fluid is taken in into an oil supply part, there exists an effect that the performance fall of a compressor can be prevented.

[First Embodiment]
Hereinafter, a compressor according to a first embodiment of the present invention (hereinafter referred to as a “scroll type compressor”) will be described with reference to FIGS. 1 to 7.
FIG. 1 is a cross-sectional view illustrating the configuration of the scroll compressor according to the present embodiment.
As shown in FIG. 1, a scroll compressor (compressor) 10 according to this embodiment includes a housing 11 having a sealed space (space) m therein, and is disposed in the housing 11 and is taken into the sealed space m. The main elements are a scroll compression mechanism (compression mechanism) 12 that compresses the refrigerant gas (fluid), a rotary shaft 13 that drives the scroll compression mechanism 12, and a drive unit that drives the scroll compression mechanism 12 to revolve. It is configured.

  The housing 11 is composed of a front housing 14 and a rear housing 15, which are combined and fixed with a plurality of bolts (not shown) so that a sealed space m is formed inside. It has become. A sealing O-ring 16 that keeps the sealed state of the sealed space m is disposed at a joint portion between the front housing 14 and the rear housing 15.

Further, a thrust plate 14 a that matches the end surface is provided on the end surface of the front housing 14.
A suction port (not shown) for sucking refrigerant gas is formed on the front side of the rear housing 15 so as to communicate with the sealed space m, and a discharge cavity, which will be described later, is formed on the rear side of the rear housing 15. 17, a discharge port 15a (see FIG. 2) for discharging the compressed refrigerant gas is formed.

The scroll compression mechanism 12 is generally composed of a fixed scroll 21 and a turning scroll 22.
The fixed scroll 21 includes a fixed end plate 21a and a spiral wall body 21b erected on the inner surface thereof, and a discharge port 21c is formed at the center of the fixed end plate 21a. The discharge port 21c is opened and closed by a discharge valve (not shown) attached to the rear surface (back surface) of the fixed end plate 21a via a bolt (not shown).
A lubricating oil supply path (oil supply section) 23 that connects the bottom of the oil reservoir chamber 18 and the suction side bottom of the sealed space m is formed at the lower end of the fixed scroll 21. In the upstream end portion, a filter 24 and a flow rate adjusting spiral pin 25 are arranged from the upstream side.

The orbiting scroll 22 includes an orbiting end plate 22a and a spiral wall body 22b standing on the inner surface thereof. An eccentric bush 31 is rotatably fitted in a boss 22c erected on the outer surface of the swivel end plate 22a via a needle bearing 32, and the rotary shaft 13 is inserted into a hole formed in the eccentric bush 31. An eccentric pin 13a that protrudes from the end is fitted. A plurality of compression chambers C are formed by causing the fixed scroll 21 and the orbiting scroll 22 to be eccentric from each other by a predetermined distance and engaged with each other while shifting the angle by 180 degrees.
An Oldham ring (rotation prevention mechanism) 33 is provided between the orbiting scroll 22 and the front housing 14, and the orbiting scroll 22 does not rotate around the eccentric bush 31 when the rotating shaft 13 is rotated. It is like that. Therefore, when the rotary shaft 13 is rotated, the orbiting scroll 22 does not rotate but only performs a revolving orbiting motion. Further, the eccentric bush 31 is provided with a balance weight 34 so as to cancel the centrifugal force accompanying the revolution of the orbiting scroll 22.

The rotating shaft 13 is a rotor shaft that rotates about its axis by a driving mechanism (not shown) such as an engine or an electric motor, and the above-described eccentric pin 13a having an eccentric axis is projected from the tip thereof. The rotating shaft 13 is supported by a first bearing 35 and a second bearing 36 provided on the front housing 14 side so as to be rotatable around the axis.
The driving force from the engine, the electric motor, or the like is transmitted or not transmitted to the rotary shaft 13 via an electromagnetic clutch (not shown).
In addition, a single sealing O-ring 37 that keeps the sealed space m sealed is disposed at the joint between the fixed scroll 21 and the rear housing 15.

Next, the structure of the vicinity of the discharge cavity, the oil sump chamber, and the communication path, which is a feature of the present invention, will be described.
FIG. 2 is a cross-sectional view taken along the line AA ′ for explaining the configuration of the rear housing and the configuration of the oil separation chamber in FIG. 1.
In the space between the rear housing 15 and the fixed scroll 21, as shown in FIGS. 1 and 2, a discharge cavity (discharge chamber) 17 into which refrigerant including lubricating oil R discharged from the scroll compression mechanism 12 flows, and An oil reservoir chamber 18 in which the lubricating oil R separated from the refrigerant is stored is formed.
The discharge cavity 17 and the oil reservoir chamber 18 are separated from each other by a partition rib 17 a formed in the rear housing 15 and a partition wall 21 d formed in the fixed scroll 21.

  As shown in FIG. 2, an oil separation chamber 41 formed in a substantially cylindrical shape for separating the lubricating oil R from the refrigerant containing the lubricating oil R is arranged in the discharge cavity 17. At the upper end of the oil separation chamber 41, a discharge port 15a for discharging the compressed refrigerant to the outside of the scroll compressor 10 is formed. At the lower end of the oil separation chamber 41, the oil reservoir chamber 18 is opened and separated. An oil discharge hole 43 for supplying the lubricating oil R to the oil reservoir chamber 18 is formed.

  An inflow hole 45 is formed in the side wall of the oil separation chamber 41 so that the inside and the discharge cavity 17 communicate with each other. The refrigerant flow flowing in from the inflow hole 45 swirls along the inner wall surface of the oil separation chamber 41, separates the lubricating oil contained in the refrigerant by centrifugation, and then the end of the inner cylinder disposed in the separation chamber 41. The refrigerant from which oil has been removed from the opening of the part is led out in the direction of the axis L1.

FIG. 3 is a cross-sectional view taken along the line BB ′ for explaining the configuration of the rear housing, the fixed scroll, and the communication path of FIG. 1.
As shown in FIGS. 1 to 3, the rear housing 15 and the fixed scroll 21 are coupled by a bolt 47, and a housing seat surface that contacts the fixed scroll 21 around a hole 49 through which the bolt 47 of the rear housing 15 passes. 15 f is formed, and the scroll seat surface 21 f is formed at a position facing the housing seat surface 15 f in the fixed scroll 21. When the fixed scroll 21 is fixed to the rear housing 15, the seat surfaces 15 f and 21 f are brought into contact with each other, and the partition rib 17 a formed on the rear housing 15 and the partition formed on the fixed scroll 21 as described above. The discharge cavity 17 and the oil reservoir chamber 18 are separated from each other by the wall 21d.

FIG. 4 is a cross-sectional view taken along the line C-C-C 'illustrating the configuration of the communication path in FIG. FIG. 5 is a partially enlarged view illustrating the configuration of the communication passage in the discharge cavity region of FIG. FIG. 6 is a partially enlarged view for explaining the configuration of the communication path in the oil sump chamber region of FIG. 4. FIG. 7 is a partially enlarged C-O-D ′ sectional view for explaining the configuration of the communication path in the seating surface forming region of FIG. 4.
A substantially annular communication path 51 is formed between the inner peripheral surface of the rear housing 15 and the outer peripheral surface of the fixed scroll 21 as shown in FIGS. The communication path 51 is formed closer to the discharge cavity 17 and the oil reservoir chamber 18 (rear) than the groove 37 a in which the O-ring 37 is disposed, and is formed to communicate with the discharge cavity 17 and the oil reservoir chamber 18.

Specifically, the rear housing 15 is formed with a housing inclined surface portion 51a in which the diameter of the inner peripheral surface decreases from the vicinity of the region where the groove 37a is formed toward the rear (left direction in FIG. 4). Similarly, the scroll 21 is also formed with a scroll slope portion 51b in which the diameter of the outer peripheral surface is reduced. The communication path 51 is formed by shifting the formation positions of these slope portions 51a and 51b in the front-rear direction (left-right direction in FIG. 4).
In the region behind the formation region of the communication passage 51, the outer peripheral surface diameter of the fixed scroll 21 is formed smaller than the inner peripheral surface diameter of the rear housing 15, and the communication passage 51 and the discharge cavity 17 communicate with each other. The oil sump chamber 18 is in communication.

In the region where the seating surfaces 15f and 21f are formed, as shown in FIGS. 3 and 7, the inner peripheral surface diameter of the rear housing 15 is formed smaller than the other regions, and is substantially in contact with the outer peripheral surface of the fixed scroll 21. It is formed to do. Therefore, in the region where the seat surfaces 15f and 21f are formed, the communication passage 51 has a smaller passage area than the other regions.

Here, in this embodiment, the partition walls of the discharge cavity 17 and the oil sump chamber 18, which are partition walls constituted by the rear housing seat surface 15 f, the partition rib 17 a, the fixed scroll seat surface 21 f and the partition wall 21 d, are shown in FIG. A communication path 51 as shown in FIG. In addition, the flow path area of the communication path 51 in a present Example is set to about 1-10 mm < ² >.

Next, the operation of the scroll compressor described above will be described.
In the scroll compressor 10, as shown in FIG. 1, when an electromagnetic clutch is engaged, a rotational driving force from an engine, an electric motor or the like is transmitted to the rotary shaft 13, and this rotational driving force is transmitted to an eccentric pin 13a, an eccentric shaft. This is transmitted to the orbiting scroll 22 of the scroll compression mechanism 12 via the bush 31 and the boss 22c. The orbiting scroll 22 is prevented from rotating by the Oldham ring 33 and is driven to perform a revolving orbiting motion on a circular orbit having a revolving orbiting radius as a radius.

  When the orbiting scroll 22 is driven to revolve orbit, the refrigerant gas enters the sealed space m of the housing 11 through the intake port and is sucked into the compression chamber C of the scroll compression mechanism 12. Then, as the volume of the compression chamber C decreases due to the revolving orbiting motion of the orbiting scroll 33, the refrigerant gas reaches the center while being compressed, and the compressed refrigerant containing the lubricating oil R is discharged from the discharge port 21 c to the discharge cavity 17. Is done.

As shown in FIGS. 1 and 2, the discharged compressed refrigerant flows into the oil separation chamber 41 from the inflow hole 45, and moves downward (downward in FIG. 2) along the inner peripheral surface of the oil separation chamber 41. Can be swirled in a spiral. Lubricating oil R contained in the refrigerant is separated from the refrigerant by centrifugal force due to swirling and falls downward while swirling along the inner wall of the oil separation chamber 41. The separated lubricating oil R flows into the oil reservoir chamber 18 through the oil discharge hole 43.
On the other hand, the refrigerant from which the lubricating oil R has been separated in the oil separation chamber 41 is discharged from the discharge port 15 a formed at the upper end of the oil separation chamber 41, changing the flow direction from below to above.

Here, a part of the refrigerant including the lubricating oil R discharged into the discharge cavity 17 passes through the communication path 51 and flows into the oil reservoir chamber 18. Generally, since the discharge port 21c of the scroll compression mechanism 12 is opened in the discharge cavity 17, the pressure is high, and the oil sump chamber 18 is low pressure through the lubricating oil supply passage 23 that functions as a throttle. The pressure in the oil reservoir chamber 18 communicates with the suction side and is intermediate between the high pressure and the low pressure.
Due to the pressure difference between the discharge cavity 17 and the oil reservoir chamber 18, the refrigerant in the discharge cavity 17 flows into the oil reservoir chamber 18 through the communication path 51.
On the contrary, when the pressure in the oil sump chamber 18 becomes higher than the pressure in the discharge cavity 17, the refrigerant in the oil sump chamber 18 flows into the discharge cavity 17 through the communication path 51. . That is, the communication passage 51 also functions as a gas vent hole in the oil reservoir chamber 18.

  As shown in FIG. 3, the refrigerant flows into the oil reservoir chamber 18 from the left and right ends of the oil reservoir chamber 18. The inflowing refrigerant is sprayed onto the oil surface of the lubricating oil R stored in the oil reservoir chamber 18, and the oil surface in the sprayed region is pushed downward. On the other hand, in the other substantially central region, the oil level is blown up and pushed upward.

  According to the above configuration, the oil reservoir chamber 18 can be used as the discharge cavity 17 by allowing the discharge cavity 17 and the oil reservoir chamber 18 to communicate with each other through the communication passage 51 and allowing the refrigerant that is a gas to flow in both directions. Can be used. Therefore, the volume of the oil reservoir chamber 18 can be used in addition to the discharge cavity 17 to suppress the discharge pulsation, and the discharge pulsation can be easily suppressed.

Since the refrigerant flowing through the communication passage 51 is a part of the refrigerant discharged from the scroll compression mechanism 12, the flow rate of the refrigerant flowing into the oil reservoir chamber 18 can be limited, and the oil level of the stored lubricating oil R can be reduced. It can be made difficult to disturb, and the lubricating oil R can be prevented from scattering.
Therefore, the intake of the lubricating oil R through the lubricating oil supply passage 23 is not hindered, and the lubricating oil R can be stably supplied to the scroll compression mechanism 12, thereby preventing a decrease in the durability of the scroll compressor 10. it can. In addition, the discharged refrigerant can be prevented from being taken into the lubricating oil supply passage 23, and the discharged refrigerant can be prevented from flowing into the suction side of the sealed space m. Therefore, it is possible to prevent the performance of the scroll compressor 10 from being deteriorated.
Moreover, since the flow rate of the refrigerant flowing into the oil separation chamber 41 can be reduced and the flow velocity can be reduced, it is possible to prevent the oil level of the stored lubricating oil R from being disturbed.

Since the discharge cavity 17 and the oil reservoir chamber 18 communicate with each other, when the scroll compressor 10 sucks the liquid refrigerant liquefied under predetermined conditions, a part of the liquid refrigerant discharged into the discharge cavity 17 is oiled. It can flow into the reservoir chamber 18.
Therefore, it is possible to delay the generation of excessive pressure in the scroll compression mechanism 12 and the like due to the liquid refrigerant filling the discharge cavity 17, and to allow the liquid refrigerant to flow out from the discharge cavity 17 during the delay. Generation of a large pressure can be prevented, and a decrease in the durability of the scroll compressor 10 can be prevented.

  Since the position at which the refrigerant flows into the oil reservoir chamber 18 from the communication path 51 is above the oil level of the stored lubricating oil R, the refrigerant is more in comparison with the case where the refrigerant flows into the stored lubricating oil R. The oil level can be prevented from being disturbed, and the lubricating oil R can be prevented from scattering.

  By forming the communication path 51 between the rear housing 15 and the fixed scroll 21, the communication path 51 can be formed without increasing the number of processing steps. That is, when the communication path 51 is formed as a gap between the inner peripheral surface of the rear housing 15 and the outer peripheral surface of the fixed scroll 21, for example, compared to a method of forming a through hole that connects the discharge cavity 17 and the oil reservoir chamber 18. The communication path 51 can be easily formed.

By flowing the refrigerant from the left and right ends of the oil reservoir chamber 18, it is possible to control the oil surface of the stored lubricating oil R so that the oil surface in the substantially central region protrudes upward. That is, the oil level is pushed down by the refrigerant in the left and right end regions. On the other hand, the oil level in the substantially central region is pushed upward.
Therefore, it is possible to prevent the oil level of the lubricating oil R from being pushed up in the region where the lubricating oil supply path 23 is disposed, and the refrigerant to be taken into the lubricating oil supply path 23.

  Conversely, the lubricating oil supply path 23 may be disposed in a region where the oil level of the lubricating oil R is pushed up, and in this case also, the refrigerant is prevented from being taken into the lubricating oil supply path 23. Can do.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
The basic configuration of the scroll compressor of this embodiment is the same as that of the first embodiment, but the configuration of the oil sump chamber is different from that of the first embodiment. Therefore, in this embodiment, only the configuration around the oil sump chamber will be described with reference to FIGS. 8 and 9, and description of scroll compressor steel and the like will be omitted.
FIG. 8 is a cross-sectional view illustrating the configuration of the scroll compressor according to the present embodiment.
In addition, the same code | symbol is attached | subjected to the component same as 1st Embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 8, a scroll compressor (compressor) 110 according to the present embodiment includes a housing 11 having a sealed space m therein, a scroll compression mechanism 12 that compresses refrigerant gas (fluid), and the scroll compression. The rotary shaft 13 that drives the mechanism 12 and a drive unit that drives the scroll compression mechanism 12 to revolve are schematically configured.

FIG. 9 is a cross-sectional view taken along the line EE ′ for explaining the configuration of the oil sump chamber of FIG. 8.
As shown in FIGS. 8 and 9, the space between the rear housing 15 and the fixed scroll 21 is separated from the discharge cavity 17 into which the refrigerant containing the lubricating oil R discharged from the scroll compression mechanism 12 flows, and from the refrigerant. An oil reservoir chamber 18 in which the lubricating oil R is stored is formed.
A baffle plate (wall portion) 113 is disposed above the left and right ends of the oil sump chamber 18 as shown in FIG. The baffle plate 113 is disposed at a position that blocks the flow of the refrigerant flowing from the discharge cavity 17 through the communication path 51 into the oil reservoir chamber 18.

Next, the operation of the scroll compressor described above will be described.
Since the operation of sucking, compressing and discharging the refrigerant and the operation of separating the lubricating oil from the refrigerant in the scroll compressor 110 are the same as those in the first embodiment, the description thereof is omitted.

Here, a part of the refrigerant including the lubricating oil R discharged into the discharge cavity 17 is accumulated in the oil through the communication passage 51 due to the pressure difference between the discharge cavity 17 and the oil reservoir chamber 18, as shown in FIG. It flows into the chamber 18. The refrigerant that has flowed into the oil reservoir chamber 18 collides with the baffle plate 113, and its dynamic pressure is converted into a static pressure.
The oil level of the lubricating oil R in the vicinity of the baffle plate 113 is pushed downward by the converted static pressure. On the other hand, the oil level in the substantially central region is pushed upward.
The refrigerant that collides with the baffle plate 113 is a refrigerant that includes the lubricating oil R discharged from the fixed scroll 21. The lubricating oil R contained in the refrigerant collides with the baffle plate 113 and is separated from the refrigerant.

  According to the above configuration, since the baffle plate 113 is provided at a position where the flow of the refrigerant flowing into the oil reservoir chamber 18 is blocked, the oil level of the lubricating oil R in the vicinity region thereof is pushed down, and the oil in the other substantially central region. The surface can be pushed up. Therefore, it is possible to prevent the oil level of the lubricating oil R from being pushed up in the region where the lubricating oil supply path 23 is disposed, and the refrigerant to be taken into the lubricating oil supply path 23.

  By causing the refrigerant containing the lubricating oil R to collide with the baffle plate 113, it is possible to prevent the refrigerant from being directly sprayed onto the oil surface of the lubricating oil R, and to prevent the oil surface from being disturbed. Moreover, the lubricating oil R can be separated from the refrigerant by colliding the refrigerant.

  As described above, the communication path 51 may be configured so that the refrigerant flows from the left and right ends of the oil sump chamber 18, or the communication path 51 is configured so that the refrigerant flows from either the left or right. Alternatively, the communication path 51 may be configured so that the refrigerant flows from three or more locations. In this case, it is desirable to determine the position of the lubricating oil supply path 23 so that the gap between the oil surface of the lubricating oil R and the lubricating oil supply path 23 is the widest.

  The communication passage 51 described above may be formed by enlarging the inner peripheral surface diameter of the rear housing 15, or may be formed by reducing the outer peripheral surface diameter of the fixed scroll 21, and is not particularly limited. Absent. For example, a groove-shaped communication path may be provided directly in the rear housing partition 17a or the fixed scroll partition 21d. Further, as described above, the openings of the communication passage 51 and the discharge cavity 17 and the openings of the communication passage 51 and the oil sump chamber 18 may be provided in all regions other than the seating surface, or only in a partial region. It may be formed and is not particularly limited. In the case where the opening is formed only in a partial region of the oil reservoir chamber, it is desirable that the opening be formed above the oil surface of the lubricating oil R stored.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the scroll type compressor is described as being applied to an open type scroll type compressor. However, the invention is applicable not only to an open type but also to a semi-hermetic type or a hermetic type scroll type compressor. You can also.

In addition, the scroll compressor of the present invention can be a stationary scroll compressor as well as a vehicle-mounted scroll compressor as described above.
Furthermore, the compressor is not limited to the scroll type compressor as described above, and may be a swash plate compressor, a reciprocating compressor, or the like.
Furthermore, the compressor is not limited to the horizontal type as described above, but may be a vertical type.

It is sectional drawing explaining the structure of the scroll compressor which concerns on the 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line AA ′ for explaining the configuration of the rear housing and the configuration of an oil separation chamber in FIG. 1. FIG. 3 is a cross-sectional view taken along the line BB ′ for explaining the configuration of the rear housing, fixed scroll, and communication path of FIG. 1. FIG. 4 is a cross-sectional view taken along the line C-C-C ′ illustrating the configuration of the communication path in FIG. 3. It is the elements on larger scale explaining the structure of the communicating path in the discharge cavity area | region of FIG. FIG. 5 is a partially enlarged view illustrating a configuration of a communication path in the oil sump chamber region of FIG. 4. FIG. 5 is a partially enlarged C-O-D ′ partial enlarged cross-sectional view for explaining the configuration of the communication path in the seat surface formation region of FIG. 4. It is sectional drawing explaining the structure of the scroll compressor which concerns on the 2nd Embodiment of this invention. FIG. 9 is a cross-sectional view taken along the line EE ′ for explaining the configuration of the oil sump chamber in FIG. 8.

Explanation of symbols

10,110 Scroll type compressor (compressor)
11 Housing 12 Scroll compression mechanism (compression mechanism)
14 Front housing 15 Rear housing 17 Discharge cavity (discharge chamber)
18 Oil reservoir chamber 23 Lubricating oil supply path (oil supply section)
41 Oil separation chamber 51 Communication path 113 Baffle plate (wall)
m Sealed space (space)
R Lubricating oil

Claims (6)

A housing having a space inside;
A compression mechanism disposed in the housing and compressing the fluid taken in the space;
A discharge chamber disposed in the housing and into which the fluid discharged from the compression mechanism flows;
An oil separation unit that is disposed in the discharge chamber and separates the lubricating oil mixed in the fluid discharged from the compression mechanism from the fluid;
An oil reservoir chamber that is formed separately from the discharge chamber and stores the lubricating oil separated by the oil separation chamber;
An oil supply unit that supplies the lubricating oil stored in the oil reservoir to the compression mechanism,
A communication passage is provided for communicating the discharge chamber and the oil reservoir chamber;
The compressor characterized in that the communication passage is configured so that a part of the fluid discharged from the compression mechanism flows through the communication passage.   The compressor according to claim 1, wherein the communication path communicates with the oil reservoir chamber above an oil level of the stored lubricating oil.   3. The compressor according to claim 1, wherein a wall portion is provided in the oil reservoir chamber at a position where the flow of fluid flowing in from the communication passage is blocked.   The compressor according to any one of claims 1 to 3, wherein the communication path is formed between the housing and the compression mechanism.   The compressor according to any one of claims 1 to 4, wherein an opening in the oil reservoir chamber of the oil supply section is provided at a position farthest from the oil surface of the lubricating oil.   The compressor according to any one of claims 1 to 5, wherein the fluid flows into the oil reservoir chamber from at least two directions.

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