JP6074620B2 - Compressor - Google Patents

Description

  The present invention relates to a compressor provided with an oil separation mechanism that separates oil from refrigerant gas discharged from the compression mechanism.

  2. Description of the Related Art Conventionally, a compressor used for an air conditioner, a cooling device, and the like generally includes a compression mechanism section and an electric motor section that drives a rear portion of the compressor in a casing, and compresses the refrigerant gas returned from the refrigeration cycle. It plays a role of compressing and feeding to the refrigeration cycle. Generally, the refrigerant gas compressed by the compression mechanism unit once flows around the motor to cool the motor unit, and then is sent to a refrigeration cycle from a discharge pipe provided in the casing (for example, Patent Documents). 1). That is, the refrigerant gas compressed by the compression mechanism is discharged from the discharge port to the discharge space. Thereafter, the refrigerant gas passes through a passage provided on the outer periphery of the frame and is discharged to the upper part of the motor space between the compression mechanism unit and the motor unit. A part of the refrigerant gas is discharged from the discharge pipe after cooling the electric motor unit. Further, the other refrigerant gas communicates with the upper and lower motor spaces of the motor unit by a passage formed between the motor unit and the inner wall of the casing, cools the motor unit, and then rotates the rotor of the motor unit. And through the gap between the stator and the motor space at the top of the motor section, and discharged from the discharge pipe.

JP-A-5-44667

  However, in the conventional configuration, the high-temperature and high-pressure refrigerant gas compressed by the compression mechanism portion flows through the electric motor portion, so that the electric motor portion is heated by the refrigerant gas and causes a reduction in efficiency of the electric motor portion. It was. Also, through the passage provided on the outer periphery of the frame, the high-temperature discharge gas flows through the lower part of the compression mechanism unit, so the compression mechanism unit is heated, and in particular, the refrigerant gas in the low temperature state returned from the refrigeration cycle, Heat is received in the process of being sent to the compression chamber through the suction path. Therefore, at the time of actually entering the compression chamber, the refrigerant gas expands and has a problem of causing a reduction in the circulation amount. Furthermore, when a lot of oil is contained in the refrigerant discharged from the discharge pipe, there is a problem that the cycle performance is deteriorated.

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a compressor that realizes high efficiency of the motor unit, improvement of volumetric efficiency, and low oil circulation. .

  In order to solve the above-described conventional problems, a compressor according to the present invention includes a cylindrical space that swirls refrigerant gas, an inflow portion that flows refrigerant gas discharged from the compression mechanism into the cylindrical space, and a cylindrical space. A plurality of oil separation mechanisms are provided in one container space, each of which includes a delivery port for sending refrigerant gas from which oil has been separated and a discharge port for discharging separated oil and part of the refrigerant gas from the cylindrical space. In addition, an opening / closing valve is provided in at least one inflow portion of the oil separation mechanism.

According to the present invention, most of the high-temperature and high-pressure refrigerant gas that is compressed by the compression mechanism and delivered from the oil separation mechanism is led to the one container inner space and discharged from the discharge pipe. Therefore, since most of the high-temperature and high-pressure refrigerant gas does not pass through the electric motor part, the electric motor part is not heated by the refrigerant gas, and the efficiency of the electric motor part can be improved.

  In addition, according to the present invention, most of the high-temperature and high-pressure refrigerant gas can be guided to the one container inner space, so that the heating of the compression mechanism portion in contact with the other container inner space can be suppressed. Heating can be suppressed and high volumetric efficiency in the compression chamber can be obtained.

  Further, according to the present invention, the oil separated by the oil separation mechanism is discharged together with the refrigerant gas to the other container space, so that the oil hardly stays in the cylindrical space. Accordingly, the separated oil is blown up in the cylindrical space by the swirling refrigerant gas, and is not sent together with the refrigerant gas from the delivery port, so that stable oil separation can be performed. Furthermore, since the oil is not retained in the cylindrical space, the cylindrical space can be made small.

  Further, according to the present invention, oil and refrigerant gas can be efficiently separated in a wide range of operation from low speed operation to high speed operation of the compressor.

The longitudinal cross-sectional view of the compressor by embodiment of this invention FIG. 1 is an enlarged cross-sectional view of the main part of the compression mechanism during low-speed operation in FIG. FIG. 1 is an enlarged cross-sectional view of the main part of the compression mechanism during high-speed operation in FIG.

  According to a first aspect of the present invention, an airtight container includes a compression mechanism portion that compresses the refrigerant gas and an electric motor portion that drives the compression mechanism portion. A compressor that is divided into a container inner space, provided with a discharge pipe that discharges refrigerant gas from one container inner space to the outside of the sealed container, and an electric motor part is disposed in the other container inner space, and is discharged from the compression mechanism part. Provided with a plurality of oil separation mechanism parts for separating oil from the refrigerant gas to be supplied, the oil separation mechanism part turning into a cylindrical space for turning the refrigerant gas, and an inflow for flowing the refrigerant gas discharged from the compression mechanism part into the cylindrical space A cylindrical outlet, a delivery port for sending refrigerant gas from which oil has been separated from the cylindrical space to one of the container spaces, and a portion of the separated oil and refrigerant gas that is arranged opposite to the delivery port. Has an outlet to discharge from Oil (type X), a cylindrical space for swirling the refrigerant gas, an inflow portion for flowing the refrigerant gas discharged from the compression mechanism into the cylindrical space, and oil from the cylindrical space into one container space A delivery port for sending the separated refrigerant gas, a discharge port that is disposed opposite the delivery port and discharges the separated oil and a part of the refrigerant gas from the cylindrical space, and is provided with an opening / closing valve at the inflow portion It is composed of two types of oil separation mechanism portions of the type (type Y).

According to this configuration, most of the high-temperature and high-pressure refrigerant gas that is compressed by the compression mechanism and delivered from the oil separation mechanism is led to the one container inner space and discharged from the discharge pipe. Therefore, since most of the high-temperature and high-pressure refrigerant gas does not pass through the electric motor part, the electric motor part is not heated by the refrigerant gas, and the efficiency of the electric motor part can be improved. Further, according to this configuration, most of the high-temperature and high-pressure refrigerant gas can be guided to the one container inner space, so that the heating of the compression mechanism portion in contact with the other container inner space can be suppressed. Heating can be suppressed and high volumetric efficiency in the compression chamber can be obtained. Further, according to this configuration, the oil separated by the oil separation mechanism is discharged together with the refrigerant gas from the discharge port located at the position facing the delivery port, so that the oil is mostly retained in the cylindrical space. No. Accordingly, the separated oil is blown up in the cylindrical space by the swirling refrigerant gas, and is not sent together with the refrigerant gas from the delivery port, so that stable oil separation can be performed. Furthermore, since the oil is not retained in the cylindrical space, the cylindrical space can be made small. Further, according to this configuration, oil and refrigerant gas can be efficiently separated in a wide range of operation from low speed operation to high speed operation of the compressor.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a compressor according to Embodiment 1 of the present invention. As shown in FIG. 1, the compressor according to the present embodiment includes a compression mechanism unit 10 that compresses refrigerant gas and an electric motor unit 20 that drives the compression mechanism unit 10 in the sealed container 1. The inside of the sealed container 1 is divided into one container inner space 31 and the other container inner space 32 by the compression mechanism unit 10, and these container inner spaces 31, 32 are communication paths provided on the outer periphery of the compression mechanism unit 10. Connected at 46. The electric motor unit 20 is disposed in the other container space 32.

  The other container space 32 is divided into a compression mechanism side space 33 and an oil storage side space 34 by the electric motor unit 20. The oil storage section 2 is arranged in the oil storage space 34. A suction tube 3 and a discharge tube 4 are fixed to the sealed container 1 by welding. The suction pipe 3 and the discharge pipe 4 lead to the outside of the sealed container 1 and are connected to members constituting the refrigeration cycle. The suction pipe 3 introduces a refrigerant gas from the outside of the sealed container 1, and the discharge pipe 4 guides the refrigerant gas from one container inner space 31 to the outside of the sealed container 1. The main bearing member 11 is fixed in the sealed container 1 by welding or shrink fitting, and supports the shaft 5. A fixed scroll 12 is bolted to the main bearing member 11. The orbiting scroll 13 that meshes with the fixed scroll 12 is sandwiched between the main bearing member 11 and the fixed scroll 12. The main bearing member 11, the fixed scroll 12, and the orbiting scroll 13 constitute a scroll-type compression mechanism unit 10.

  Between the orbiting scroll 13 and the main bearing member 11, a rotation restraint mechanism 14 such as an Oldham ring is provided. The rotation restraint mechanism 14 prevents the orbiting scroll 13 from rotating, and guides the orbiting scroll 13 to make a circular orbital motion. The orbiting scroll 13 is eccentrically driven by an eccentric shaft portion 5 a provided at the upper end of the shaft 5. By this eccentric drive, the compression chamber 15 formed between the fixed scroll 12 and the orbiting scroll 13 moves from the outer periphery toward the center, and compresses with a reduced volume.

  A suction path (not shown) is formed between the suction pipe 3 and the compression chamber 15. The suction path is provided in the fixed scroll 12. A discharge port 17 of the compression mechanism unit 10 is formed at the center of the fixed scroll 12. A reed valve 18 is provided at the discharge port 17.

  A muffler 19 that covers the discharge port 17 and the reed valve 18 is provided on one container inner space 31 side of the fixed scroll 12. The muffler 19 isolates the discharge port 17 from one container inner space 31.

The refrigerant gas is sucked into the compression chamber 15 from the suction pipe 3 through the suction path. The refrigerant gas compressed in the compression chamber 15 is discharged into the muffler 19 from the discharge port 17. The reed valve 18 is pushed open when the refrigerant gas is discharged from the discharge port 17. A pump 6 is provided at the lower end of the shaft 5. The suction port of the pump 6 is disposed in the oil storage part 2 provided at the bottom of the sealed container 1. The pump 6 is driven by the shaft 5. Therefore, the oil in the oil storage section 2 can be reliably sucked up regardless of the pressure condition and the operating speed, and no oil runs out at the sliding section. The oil sucked up by the pump 6 is supplied to the compression mechanism 10 through an oil supply hole 7 formed in the shaft 5. If foreign matter is removed from the oil using an oil filter before or after the oil is sucked up by the pump 6, foreign matter can be prevented from being mixed into the compression mechanism unit 10, and further reliability can be improved.

  The pressure of the oil guided to the compression mechanism unit 10 is substantially the same as the discharge pressure of the refrigerant gas discharged from the discharge port 17 and also serves as a back pressure source for the orbiting scroll 13. As a result, the orbiting scroll 13 operates stably without leaving the fixed scroll 12 or hitting it. Further, part of the oil enters the fitting portion between the eccentric shaft portion 5a and the orbiting scroll 13 and the bearing portion 8 between the shaft 5 and the main bearing member 11 so as to obtain a clearance by the supply pressure and the own weight. Then, it is lubricated, then falls and returns to the oil storage section 2.

  A path 7 a is formed in the orbiting scroll 13, one end of the path 7 a opens to the high pressure region 35, and the other end of the path 7 a opens to the back pressure chamber 36. The rotation restraint mechanism 14 is disposed in the back pressure chamber 36. Accordingly, part of the oil supplied to the high pressure region 35 enters the back pressure chamber 36 through the path 7a. The oil that has entered the back pressure chamber 36 lubricates the thrust sliding portion and the sliding portion of the rotation restraint mechanism 14 and applies back pressure to the orbiting scroll 13 in the back pressure chamber 36.

  Next, the oil separation mechanism of the compressor according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 2 is an enlarged cross-sectional view of a main part of the compression mechanism portion at the time of low speed operation of FIG. 1, and FIG.

  The compressor according to the present embodiment is provided with two types of oil separation mechanisms 40X and 40Y that separate oil from the refrigerant gas discharged from the compression mechanism 10. The oil separation mechanism section 40X communicates the cylindrical space 41 that turns the refrigerant gas, the inflow section 42 that connects the inside of the muffler 19 and the cylindrical space 41, and the cylindrical space 41 and one of the container spaces 31. It has the delivery port 43 and the discharge port 44 which connects the cylindrical space 41 and the communicating path 46. The cylindrical space 41 includes a cylindrical recess 19a formed in the muffler 19 and a lid 19b that covers the cylindrical recess 19a. The inflow portion 42 includes an inflow groove 19 c formed in the muffler 19 and a lid 19 b, and preferably the opening of the inflow portion 42 is formed on the inner peripheral surface of the upper end of the cylindrical space 41. The inflow portion 42 causes the refrigerant gas discharged from the compression mechanism portion 10 to flow into the cylindrical space 41 from the muffler 19. The inflow portion 42 opens in the tangential direction with respect to the cylindrical space 41.

  The delivery port 43 is formed on the upper end side of the cylindrical space 41 and is formed at least on the side of the in-container space 31 relative to the inflow portion 42. The delivery port 43 is preferably formed in the lid 19 b on the upper end side of the cylindrical space 41. And the delivery port 43 sends out the refrigerant gas which isolate | separated oil from the cylindrical space 41 to the one container inner space 31.

  The discharge port 44 is formed on the lower end side of the cylindrical space 41 and is formed at least on the other container inner space 32 side than the inflow portion 42. The discharge port 44 is preferably formed on the lower end surface of the cylindrical space 41. The discharge port 44 discharges the separated oil and a part of the refrigerant gas from the cylindrical space 41 to the compression mechanism side space 33.

In the present embodiment, a cylindrical space 41 is formed by providing a cylindrical recess 19a on the upper surface side of the muffler 19 and covering it with a lid 19b. Further, an inflow groove 19c that opens in a tangential direction is formed in the cylindrical space 41 on the upper surface side of the muffler 19, and the inflow portion 42 is configured by covering this with a lid 19b. Further, the delivery port 43 is constituted by a hole formed in the lid 19 b, and this hole is arranged in the opening of the cylindrical space 41. Further, the discharge port 44 is configured by a hole formed in the muffler 19 on the lower end side of the cylindrical space 41, and this hole is disposed in the opening of the cylindrical space 41. The discharge port 44 communicates with a discharge groove 19 d provided on the lower surface side of the muffler 19. This groove forms a discharge passage 47 with the end surface on the side opposite to the wrap of the fixed scroll 12. The discharge passage 47 is constituted by a notch 10a on the outer peripheral side of the compression mechanism section 10 and the inner wall of the sealed container 1, and one container inner space 3
An opening is formed in a communication passage 46 that communicates the first and the other container internal space 32.

  The basic configuration of the oil separation mechanism 40Y is the same as that of the oil separation mechanism X, except that an on-off valve 42a is provided in the middle of the inflow portion 42. Hereinafter, the operation of the oil separation mechanisms 40X and 40Y during low-speed operation according to the present embodiment will be described with reference to FIG.

  The refrigerant gas discharged into the muffler 19 is guided to the cylindrical space 41 through the inflow portion 42 of the oil separation mechanism portion 40X provided on the upper surface side of the muffler 19. On the other hand, the refrigerant gas does not flow into the cylindrical space 41 of the oil separation mechanism 40Y. This is because the on / off valve 42a is kept closed because the differential pressure between the pressure in the muffler 19 and the pressure in the container space 31 is small during low speed operation. Since the inflow portion 42 opens in a tangential direction with respect to the cylindrical space 41, the refrigerant gas delivered from the inflow portion 42 flows along the inner wall surface of the cylindrical space 41, and the inner periphery of the cylindrical space 41. A swirling flow is generated on the surface. This swirling flow is a flow toward the discharge port 44.

  The refrigerant gas contains oil supplied to the compression mechanism unit 10, and while the refrigerant gas is swirling, the oil having a high specific gravity adheres to the inner wall of the cylindrical space 41 by centrifugal force, and the refrigerant gas and To separate. The swirl flow generated on the inner peripheral surface of the cylindrical space 41 turns back after reaching the discharge port 44 or in the vicinity of the discharge port 44 and changes to an upward flow passing through the center of the cylindrical space 41. The refrigerant gas from which the oil has been separated by the centrifugal force reaches the delivery port 43 by the upward flow and is sent to the one container inner space 31. The refrigerant gas sent out to one container inner space 31 is sent out from the discharge pipe 4 provided in the one container inner space 31 to the outside of the sealed container 1 and supplied to the refrigeration cycle.

  The oil separated in the cylindrical space 41 is sent together with a small amount of refrigerant gas from the discharge port 44 through the discharge passage 47 to the communication passage 46 on the outer peripheral side of the compression mechanism unit 10. The oil sent out to the communication path 46 on the outer peripheral side of the compression mechanism unit 10 becomes a collision body on the inner wall of the hermetic container 1, and the oil is further separated from a small amount of refrigerant gas by the collision. The separated oil travels along the inner wall of the sealed container 1 and reaches the oil storage section 2 through its other container space 32 by its own weight. On the other hand, the refrigerant gas sent out to the communication path 46 on the outer peripheral side of the compression mechanism section 10 rises along the inner wall of the sealed container 1 and passes through the one container inner space 31 from the discharge pipe 4 to the outside of the sealed container 1. Sent out.

  Next, the operation of the oil separation mechanisms 40X and 40Y during high speed operation according to the present embodiment will be described with reference to FIG. The refrigerant gas discharged into the muffler 19 is guided to the cylindrical space 41 through the inflow portion 42 of the oil separation mechanism portion 40X provided on the upper surface side of the muffler 19. Further, the refrigerant gas is also introduced into the cylindrical space 41 of the oil separation mechanism 40Y. This is because the opening / closing valve 42a is kept open because the differential pressure between the pressure in the muffler 19 and the pressure in the container space 31 increases during high-speed operation.

  Since the inflow portions 42 of the oil separation mechanism portions 40X and 40Y open in the tangential direction with respect to the cylindrical space 41, the refrigerant gas delivered from the inflow portion 42 flows along the inner wall surface of the cylindrical space 41. A swirling flow is generated on the inner peripheral surface of the cylindrical space 41. This swirling flow is a flow toward the discharge port 44. Here, since the refrigerant gas is guided to both of the oil separation mechanisms 40X and 40Y during high-speed operation, each swirl flow can maintain an optimum speed for oil separation.

  The refrigerant gas contains oil supplied to the compression mechanism unit 10, and while the refrigerant gas is swirling, the oil having a high specific gravity adheres to the inner wall of the cylindrical space 41 by centrifugal force, and the refrigerant gas and To separate. The swirl flow generated on the inner peripheral surface of the cylindrical space 41 turns back after reaching the discharge port 44 or in the vicinity of the discharge port 44 and changes to an upward flow passing through the center of the cylindrical space 41.

The refrigerant gas from which the oil has been separated by the centrifugal force reaches the delivery port 43 by the upward flow and is sent to the one container inner space 31. The refrigerant gas sent out to one container inner space 31 is sent out from the discharge pipe 4 provided in the one container inner space 31 to the outside of the sealed container 1 and supplied to the refrigeration cycle. The oil separated in the cylindrical space 41 is sent together with a small amount of refrigerant gas from the discharge port 44 through the discharge passage 47 to the communication passage 46 on the outer peripheral side of the compression mechanism unit 10. The oil sent out to the communication path 46 on the outer peripheral side of the compression mechanism unit 10 becomes a collision body on the inner wall of the hermetic container 1, and the oil is further separated from a small amount of refrigerant gas by the collision. The separated oil travels along the inner wall of the sealed container 1 and reaches the oil storage section 2 through its other container space 32 by its own weight. On the other hand, the refrigerant gas sent out to the communication path 46 on the outer peripheral side of the compression mechanism section 10 rises along the inner wall of the sealed container 1 and passes through the one container inner space 31 from the discharge pipe 4 to the outside of the sealed container 1. Sent out.

  In the oil separation mechanism portions 40X and 40Y according to the present embodiment, the outlet 43 is formed on the one container inner space 31 side with respect to the inflow portion 42, and the outlet 44 is disposed on the other container inner space 32 side with respect to the inflow portion 42. As a result, a swirling flow is generated on the inner peripheral surface of the cylindrical space 41 between the inlet 42 and the outlet 44, and between the outlet 44 and the outlet 43, A flow in the opposite direction to the swirling flow is generated at the center. Therefore, as the discharge port 44 moves away from the inflow portion 42, the number of revolutions of the refrigerant gas increases and the oil separation effect increases. Further, since the swirling refrigerant gas passes through the central portion of the swirling flow, the delivery port 43 only needs to be on the side opposite to the discharge port from the inflow portion 42. That is, the effect of oil swirl separation can be enhanced by increasing the distance between the inflow portion 42 and the discharge port 44 as much as possible.

  Also, the oil separation mechanism sections 40X and 40Y according to the present embodiment discharge the oil together with the refrigerant gas from the discharge port 44 without storing the separated oil in the container inner space 32. The swirl flow generated on the surface is guided to the discharge port 44. If the discharge port 44 is not formed in the cylindrical space 41 and the oil is stored in the cylindrical space 41, the flow that pulls to the outside from the discharge port 44 does not occur, so the swirl flow disappears before reaching the oil surface. If it reaches the oil level, it will roll up the oil. Moreover, in order to exhibit the oil separation function without forming the discharge port 44 in the cylindrical space 41, it is necessary to form a space sufficient to store oil. However, as in the oil separation mechanism portions 40X and 40Y according to the present embodiment, by discharging the oil together with the refrigerant gas from the discharge port 44, the swirl flow can be guided to the discharge port 44 and the oil is not wound up. .

  According to the present embodiment, most of the high-temperature and high-pressure refrigerant gas compressed by the compression mechanism unit 10 and delivered from the oil separation mechanism units 40X and 40Y is guided to the one container inner space 31 and discharged from the discharge pipe 4. It is discharged from. Therefore, most of the high-temperature and high-pressure refrigerant gas does not pass through the electric motor unit 20, so that the electric motor unit 20 is not heated by the refrigerant gas, and the electric motor unit 20 can be highly efficient. In addition, according to the present embodiment, most of the high-temperature and high-pressure refrigerant gas is guided to the one container inner space 31, so that the heating of the compression mechanism unit 10 in contact with the other container inner space 32 can be suppressed. In addition, heating of the suction refrigerant gas can be suppressed, and high volumetric efficiency in the compression chamber can be obtained.

Further, according to the present embodiment, the oil separated by the oil separation mechanism portions 40X and 40Y is discharged together with the refrigerant gas to the other container space 32, so that the oil stays in the cylindrical space 41. There is almost no. Therefore, the separated oil is blown up in the cylindrical space 41 by the swirling refrigerant gas and is not sent together with the refrigerant gas from the delivery port 43, so that stable oil separation can be performed. Further, since the oil is not retained in the cylindrical space 41, the cylindrical space 41 can be made small. Moreover, according to this Embodiment, since the oil storage part 2 is arrange | positioned in the oil storage side space 34 and oil is not stored in the compression mechanism side space 33, the airtight container 1 can be reduced in size. Further, according to the present embodiment, the muffler 19 that isolates the discharge port 17 of the compression mechanism unit 10 from the one container inner space 31 is disposed, and the muffler 1 is provided by the inflow portion 42.
9 and the cylindrical space 41 communicate with each other, the refrigerant gas compressed by the compression mechanism unit 10 can be reliably guided to the oil separation mechanism units 40X and 40Y. That is, since all the refrigerant gas passes through the oil separation mechanism 40, the oil can be efficiently separated from the refrigerant gas. Further, since most of the high-temperature refrigerant gas discharged from the discharge port 17 is discharged from the discharge pipe 4 to the outside of the sealed container 1 without passing through the other container inner space 32, the electric motor unit 20 and the compression mechanism The heating of the part 10 can be suppressed. Further, according to the present embodiment, since the cylindrical space 41 is formed in the fixed scroll 12 and the main bearing member 11, the path through which the refrigerant gas flows from the discharge port 17 to the discharge pipe 4 can be configured to be short and sealed. The container 1 can be reduced in size.

  Further, according to the present embodiment, since the refrigerant gas is guided only to the oil separation mechanism 40X during the low speed operation of the compressor, the rotation of the refrigerant gas in the cylindrical space 41 is ensured at a speed sufficient for oil separation. In addition, since the refrigerant gas is guided to both of the oil separation mechanisms 40X and 40Y during high-speed operation of the compressor, the rotation of the refrigerant gas in the cylindrical space 41 can be suppressed to a speed necessary for oil separation. As a result, oil separation can be effectively performed in a wide range from low speed operation to high speed operation of the compressor.

  The present invention can be applied to a compressor having a compression mechanism section and an electric motor section in a sealed container such as a scroll compressor and a rotary compressor, and is particularly suitable for a compressor using a high-temperature refrigerant.

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Oil storage part 4 Discharge pipe 10 Compression mechanism part 11 Main bearing member 12 Fixed scroll 17 Discharge port 19 Muffler 20 Electric motor part 33 Compression mechanism side space 34 Oil storage side space 40 Oil separation mechanism part 40X Oil separation mechanism part 40Y Oil separation mechanism 41 Cylindrical space 42 Inflow part 42a On-off valve 43 Outlet 44 Discharge port 46 Communication path 47 Discharge path

Claims (1)

A compression mechanism that compresses the refrigerant gas, and an electric motor that drives the compression mechanism are provided in a sealed container.
By the compression mechanism portion, the inside of the sealed container is divided into one container inner space and the other container inner space, and a communication path that connects these container inner spaces is provided in the outer peripheral portion of the compression mechanism portion,
A compressor in which a discharge pipe for discharging the refrigerant gas from the one container inner space to the outside of the sealed container is provided, and the electric motor unit is disposed in the other container inner space;
A plurality of oil separation mechanism portions for separating oil from the refrigerant gas discharged from the compression mechanism portion,
The first oil separation mechanism is
A cylindrical space for swirling the refrigerant gas;
An inflow portion for allowing the refrigerant gas discharged from the compression mechanism portion to flow into the cylindrical space;
A delivery port for sending out the refrigerant gas from which the oil is separated from the cylindrical space to the one container inner space;
It is arranged to face the delivery port, and is composed of a discharge port for discharging the separated oil and a part of the refrigerant gas from the cylindrical space,
The second oil separation mechanism is
A cylindrical space for swirling the refrigerant gas;
An inflow portion for allowing the refrigerant gas discharged from the compression mechanism portion to flow into the cylindrical space;
An on-off valve for opening and closing the inflow part;
A delivery port for sending out the refrigerant gas from which the oil is separated from the cylindrical space to the one container inner space;
A compressor that is disposed to face the delivery port and is configured by a discharge port that discharges the separated oil and a part of the refrigerant gas from the cylindrical space.