JPWO2020170886A1 - Sealed compressor - Google Patents

Abstract

Sealed compression including a closed container (1), an electric motor, a compression mechanism, a suction pipe (6) for sucking the refrigerant, and a discharge pipe for discharging the refrigerant compressed by the compression mechanism to the outside. It is a machine. The compression mechanism portion has a fixed scroll, a swivel scroll, a refrigerant suction port, a rotating shaft, a bearing member (11), and a lubricating oil passage for supplying lubricating oil to the sliding portion. The bearing member (11) has a plurality of projecting pieces (11a, 11b, 11c, 11d) extending in the outer peripheral direction, and has an oil drainage passage (27) for discharging lubricating oil and an oil drainage pipe (28). Have. The oil drainage passage (27) and the oil drainage pipe (28) are recesses between the plurality of projecting pieces (11a, 11b, 11c, 11d) initially located in the rotational direction of the motor portion from the refrigerant suction port. (17a, 17b, 17c, 17d). The oil drain pipe (28) opens near the upper end of the motor portion facing the space portion of the closed container (1).

Description

The present disclosure relates to a closed compressor used in a cooling device such as an air conditioner and a refrigerator, and a refrigerating device such as a heat pump type hot water supply device.

Conventionally, a closed compressor used in a cooling device, a hot water supply device, or the like compresses the refrigerant gas returned from the refrigerating cycle by a compression mechanism unit and sends it to the refrigerating cycle. At that time, lubricating oil is supplied to the compression mechanism portion, and the sliding portion is lubricated. The oil that lubricates the sliding portion is discharged into the compressor and returns to the oil storage portion at the bottom of the compressor.

Refrigerant gas is in a turbulent state inside the closed compressor. Therefore, the amount of lubricating oil mixed with the refrigerant gas and flowing out to the refrigeration cycle together with the compressed refrigerant increases.

Therefore, in order to reduce the amount of lubricating oil flowing into the refrigeration cycle, the conventional sealed compressor discharges the lubricating oil from the compression mechanism to the lower part of the electric motor via the oil drain pipe, and the bottom of the compressor. It is configured to return to the oil storage section (see, for example, Patent Document 1).

FIG. 6 is a cross-sectional view showing the configuration of the closed compressor described in Patent Document 1.

The closed compressor shown in FIG. 6 is a high pressure closed compressor. Oil lubricates the meshing portion between the fixed scroll 101 and the swivel scroll 102 and the sliding portion such as the portion between the rotating shaft 103 and the bearing member 104 of the compression mechanism portion 100. The oil is supplied via the oil passage 106 in the rotating shaft 103 that drives the swivel scroll 102.

The lubricating oil after lubricating each sliding portion of the compression mechanism portion 100 is discharged into the closed container 108 through the oil drain passage 107 provided in the bearing member 104.

An oil drain pipe 109 is connected to the oil drain passage 107. The oil drain pipe 109 is passed through one of the notch recesses 112 provided on the outer periphery of the stator 111 of the motor unit 110. As a result, the oil returns to the oil storage unit 113 at the bottom of the compressor below the motor unit 110.

With such a configuration, the oil discharged from the oil drain passage 107 is discharged into the space 114 between the compression mechanism 100 and the motor 110 in the closed container 108, and turbulent flow in the space 114. It is possible to suppress mixing with the refrigerant. Therefore, the amount of lubricating oil flowing out from the discharge pipe 115 to the refrigeration cycle can be reduced.

Such a configuration is also applied to a low-pressure sealed compressor, and the amount of lubricating oil flowing out to the refrigeration cycle is reduced.

Japanese Unexamined Patent Publication No. 2006-132419

However, in the conventional closed compressor configuration, it is necessary to increase the shape of the notch recess on the outer peripheral portion of the stator of the motor portion in order to provide the oil drain pipe. This causes a decrease in motor efficiency.

On the other hand, in order to avoid a decrease in the efficiency of the motor, it is assumed that the lubricating oil is discharged directly from the oil drain passage provided in the bearing member into the space between the compression mechanism portion and the motor portion. Then, as described above, the amount of lubricating oil mixed with the refrigerant gas and flowing out to the refrigeration cycle together with the refrigerant increases in the space portion.

As described above, in the conventional compressor configuration, it is difficult to reduce the outflow amount of the lubricating oil and increase the efficiency of the compressor without causing a decrease in the efficiency of the motor unit.

The present disclosure provides a highly efficient sealed compressor that reduces the outflow of lubricating oil without causing a decrease in the efficiency of the motor.

In the present disclosure, a closed container having an oil storage portion for storing lubricating oil, an electric motor portion provided in the closed container, a compression mechanism portion arranged above the electric motor portion via a space portion, and the above-mentioned A sealed compressor provided with a suction pipe that sucks the refrigerant into the space between the motor and the compression mechanism, and a discharge pipe that discharges the refrigerant compressed by the compression mechanism to the outside. be.

The compression mechanism portion has a fixed scroll, a barrel portion, and a swirl scroll that meshes with the fixed scroll to form a compression chamber, and the refrigerant sucked into the space portion is sucked into the compression chamber. In addition, a refrigerant suction port provided on the fixed scroll and a rotating shaft having an eccentric shaft portion and fitting the eccentric shaft portion to the shaft cylinder portion of the swivel scroll to swivel drive the swivel scroll. I have.

The compression mechanism portion is a first of a bearing member having a bearing portion that supports the fixed scroll and the swivel scroll and rotatably supports the rotating shaft, and a bearing portion of the bearing member and the rotating shaft. Lubrication that supplies the lubricating oil from the oil storage portion to the fitting portion and the sliding portion including the second fitting portion between the shaft cylinder portion of the swivel scroll and the eccentric shaft portion of the rotating shaft. It is equipped with an oil passage.

The bearing member has a plurality of projecting pieces extending in the outer peripheral direction, an oil drainage passage for discharging the lubricating oil after lubricating the sliding portion, and an oil drainage pipe connected to the oil drainage passage. , It is fixed to the inner peripheral surface of the closed container.

The oil drain passage and the oil drain pipe are provided in a recess between the plurality of protruding pieces that are first located in the rotational direction of the motor portion from the refrigerant suction port of the fixed scroll.

The oil drain pipe opens in the vicinity of the upper end of the motor portion facing the space portion of the closed container.

With such a configuration, it is not necessary to pass the oil drain pipe through the notch recess on the outer peripheral portion of the stator of the motor portion, and it is not necessary to increase the shape of the notch recess on the outer peripheral portion of the stator, so that the efficiency of the motor is reduced. Can be prevented.

Further, the lubricating oil is directly discharged from the oil drain pipe to the upper end of the motor section, that is, the space between the motor section and the compression mechanism section, but the position where the lubricating oil is discharged is the rotor of the motor section. It is the most upstream side of the refrigerant flow that swirls with the rotation of.

Then, the refrigerant mixed with the lubricating oil from the oil drain pipe expands in a plurality of recesses between the protruding pieces of the bearing member until it becomes a swirling flow and reaches the refrigerant suction port of the fixed scroll. And disturb the flow. The lubricating oil in the refrigerant efficiently adheres to the inner peripheral surface of the closed container, the coil end of the motor portion, and the like, and separates them. Therefore, the amount of lubricating oil discharged to the outside can be reduced. That is, the outflow amount of the lubricating oil can be reduced without causing a decrease in the efficiency of the electric motor.

According to the present disclosure, as described above, the outflow amount of the lubricating oil can be reduced without causing a decrease in the efficiency of the motor, so that a highly efficient sealed compressor can be provided.

FIG. 1 is a side sectional view of the closed compressor according to the first embodiment of the present disclosure. FIG. 2 is an enlarged cross-sectional view showing a main part of the sealed compressor. FIG. 3 is a plan view showing the inside of the sealed compressor as viewed from above the fixed scroll. FIG. 4 is a plan view showing the inside of the sealed compressor as viewed from above the bearing member. FIG. 5 is an enlarged cross-sectional view showing a main part of the closed compressor according to the second embodiment of the present disclosure. FIG. 6 is a cross-sectional view showing the configuration of the closed compressor described in Patent Document 1.

In the present disclosure, a closed container having an oil storage portion for storing lubricating oil, an electric motor portion provided in the closed container, a compression mechanism portion arranged above the electric motor portion via a space portion, and the above-mentioned A sealed compressor provided with a suction pipe that sucks the refrigerant into the space between the motor and the compression mechanism, and a discharge pipe that discharges the refrigerant compressed by the compression mechanism to the outside. be.

The compression mechanism portion has a fixed scroll, a barrel portion, and a swirl scroll that meshes with the fixed scroll to form a compression chamber, and the refrigerant sucked into the space portion is sucked into the compression chamber. In addition, a refrigerant suction port provided on the fixed scroll and a rotating shaft having an eccentric shaft portion and fitting the eccentric shaft portion to the shaft cylinder portion of the swivel scroll to swivel drive the swivel scroll. I have.

The compression mechanism portion is a first of a bearing member having a bearing portion that supports the fixed scroll and the swivel scroll and rotatably supports the rotating shaft, and a bearing portion of the bearing member and the rotating shaft. Lubrication that supplies the lubricating oil from the oil storage portion to the fitting portion and the sliding portion including the second fitting portion between the shaft cylinder portion of the swivel scroll and the eccentric shaft portion of the rotating shaft. It is equipped with an oil passage.

The bearing member has a plurality of projecting pieces extending in the outer peripheral direction, an oil drainage passage for discharging the lubricating oil after lubricating the sliding portion, and an oil drainage pipe connected to the oil drainage passage. , It is fixed to the inner peripheral surface of the closed container.

The oil drain passage and the oil drain pipe are provided in a recess between the plurality of protruding pieces that are first located in the rotational direction of the motor portion from the refrigerant suction port of the fixed scroll.

The oil drain pipe opens in the vicinity of the upper end of the motor portion facing the space portion of the closed container.

As a result, it is not necessary to pass the oil drain pipe through the notch recess on the outer peripheral portion of the stator of the motor portion, and it is not necessary to increase the shape of the notch recess on the outer peripheral portion of the stator, thereby preventing a decrease in the efficiency of the motor. be able to.

Further, the lubricating oil is directly discharged from the oil drain pipe to the upper end of the motor section, that is, the space between the motor section and the compression mechanism section, but the position where the lubricating oil is discharged is the rotor of the motor section. It is the most upstream side of the refrigerant flow that swirls with the rotation of. Then, the refrigerant mixed with the lubricating oil from the oil drain pipe becomes a swirling flow and reaches a plurality of concave portions formed between the protruding pieces of the bearing member until it reaches the refrigerant suction port of the fixed scroll. Contact the place.

Therefore, the refrigerant mixed with the lubricating oil from the oil drain pipe swirls in the space between the motor unit and the compression mechanism unit, and is a protruding piece of the bearing member until it reaches the refrigerant suction port of the fixed scroll. It expands at multiple recesses between the parts and disturbs the flow. The refrigerant mixed with the lubricating oil efficiently adheres to the inner peripheral surface of the closed container facing the recessed portion, the coil end of the motor portion, and the like, and is separated into the refrigerant and the lubricating oil. As a result, it is possible to reduce the amount of lubricating oil that is sucked into the compression chamber from the refrigerant suction port while being mixed with the refrigerant, compressed, and discharged to the outside.

In this way, it is possible to reduce the outflow amount of the lubricating oil and realize a highly efficient sealed compressor without causing a decrease in the efficiency of the electric motor.

Further, the opening of the oil drain pipe may be located near the coil end of the motor unit.

As a result, the lubricating oil discharged from the oil drain pipe can be efficiently adhered to the coil end and removed. Therefore, it is possible to more effectively suppress the amount of circulation discharged to the outside and realize a highly efficient sealed compressor.

Further, the opening of the oil drain pipe may be located in the vicinity of the end face of the stator, below the coil end of the electric portion.

As a result, the lubricating oil from the oil drain pipe is further discharged to a place that is not easily affected by the swirling refrigerant flow generated in the space portion between the motor portion and the compression mechanism portion. Therefore, the amount of lubricating oil mixed in the refrigerant can be effectively suppressed, the amount of lubricating oil discharged to the outside can be further effectively reduced, and a highly efficient sealed compressor can be realized.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The present disclosure is not limited by these embodiments.

(First Embodiment)
FIG. 1 is a side sectional view of the closed-type compressor according to the first embodiment of the present disclosure, and FIG. 2 is an enlarged cross-sectional view showing a main part of the closed-type compressor. 3 is a plan view showing the inside of the closed type compressor when viewed from above the fixed scroll, and FIG. 4 is a plan view showing the inside of the closed type compressor when viewed from above the bearing member.

As shown in FIG. 1, in the closed compressor 50 of the present embodiment, the closed container 1, the electric motor unit 2 provided in the closed container 1, and the space portion 3 above the electric motor unit 2 are arranged. It is provided with a compression mechanism unit 4 that has been modified. The compression mechanism unit 4 is driven by the rotating shaft 5 of the motor unit 2.

The closed container 1 is provided with a suction pipe 6 (see FIGS. 3 and 4) for sucking the refrigerant from the refrigeration cycle in the space 3 between the motor unit 2 and the compression mechanism unit 4. A discharge pipe 7 for discharging the compressed refrigerant during the refrigeration cycle is provided in the space above the compression mechanism unit 4. An oil storage portion 8 for holding lubricating oil is formed on the bottom of the closed container 1.

The motor unit 2 is composed of a stator 9 and a rotor 10.

The stator 9 is fixed to the inner peripheral surface of the closed container 1 by shrink fitting, welding, or the like. The rotor 10 is fixed to the rotating shaft 5 and rotates together with the rotating shaft 5. A plurality of notch recesses 9a for returning the lubricating oil to the oil storage portion 8 are formed on the outer periphery of the stator 9 at equal intervals when viewed in the direction of the rotation axis.

The compression mechanism portion 4 includes a bearing member 11 fixed in the closed container 1, a fixed scroll 12 arranged on the bearing member 11, and a swivel scroll 13 arranged below the fixed scroll 12.

As shown in FIG. 2, the fixed swirl wrap 12a of the fixed scroll 12 and the swirl swirl wrap 13a of the swirl scroll 13 are in mesh with each other, and a compression chamber 14 is formed between them.

As shown in FIG. 3, a refrigerant suction port 15 is provided at an appropriate position on the outer circumference of the fixed scroll 12, in this example, a portion facing the suction pipe 6. The sealed compressor 50 is a low-pressure sealed compressor in which the low-pressure refrigerant in the space 3 sucked from the suction pipe 6 is sucked into the compression chamber 14.

The opening of the suction pipe 6 is provided with a cover 16 that covers the front surface, the upper surface, and both side surfaces of the opening. The refrigerant is sucked into the space 3 through the opening on the lower surface of the cover 16. The refrigerant is sucked into the compression chamber 14 from the refrigerant suction port 15 while swirling in the space 3 as the rotor 10 and the like of the motor unit 2 rotate.

Further, as shown in FIG. 4, the bearing member 11 is provided with a plurality of projecting piece portions 11a, 11b, 11c, 11d extending in the outer peripheral direction, and each projecting piece portion is inside the closed container 1 in the X portion. It is welded and fixed to the peripheral surface.

A plurality of recesses 17a, 17b, 17c, 17d facing the space 3 in which the low-pressure refrigerant sucked from the suction pipe 6 swirls are formed between the plurality of projecting piece portions 11a, 11b, 11c, 11d, respectively. Has been done. One of the plurality of recesses 17a, 17b, 17c, 17d, in this example, the suction pipe 6 opens in the recess 17d, and the refrigerant suction port 15 of the fixed scroll 12 faces the recess 17d. It is configured.

As shown in FIG. 2, the bearing member 11 for fixing the fixed scroll 12 of the compression mechanism portion 4 pivotally supports the rotating shaft 5 by the bearing portion 19. The bearing member 11 loosely fits the axle tube portion 21 formed on the bottom surface of the swivel scroll 13 to the boss portion 20 above the bearing portion 19, and supports the swivel scroll 13 in a state in which the swivel scroll can be swiveled.

The eccentric shaft portion 5a at the upper end of the rotating shaft 5 pivotally supported by the bearing member 11 is fitted to the barrel portion 21 of the swivel scroll 13. With such a configuration, the rotating shaft 5 is configured to rotate the rotating scroll 13 that is restrained to rotate.

Due to the turning motion of the turning scroll 13, the compression chamber 14 formed between the fixed scroll 12 and the turning scroll 13 moves from the outer peripheral side toward the central portion while reducing the volume. Along with this, the refrigerant gas is sucked from the space 3 through the refrigerant suction port 15, closed in the compression chamber 14, and then compressed. The refrigerant gas that has reached a predetermined pressure pushes up the valve 23 from the discharge port 22 at the center of the fixed scroll 12, is discharged into the high-pressure space 24, and is sent out from the discharge pipe 7 to the refrigeration cycle.

On the other hand, as shown in FIG. 1, a centrifugal pump 25 is provided at the lower end of the rotary shaft 5 that swivels and drives the swivel scroll 13. The suction port of the centrifugal pump 25 is arranged so as to be present in the lubricating oil of the oil storage unit 8.

The centrifugal pump 25 operates at the same time as the operation of the compressor to move the lubricating oil of the oil storage unit 8 provided at the bottom of the closed container 1 upward along the paddle 30 from the suction port by the rotation of the rotating shaft 5. Pump up. The centrifugal pump 25 applies lubricating oil to the bearing member 11 through the lubricating oil passage 26 penetrating the inside of the rotating shaft 5, the fitting portion between the bearing portion 19 and the rotating shaft 5 of the bearing member 11, and the eccentric shaft portion 5a. Is supplied to a sliding portion such as a fitting portion with the shaft cylinder portion 21 of the swivel scroll 13. The lubricating oil that lubricates the sliding portion is discharged from the boss portion 20 of the bearing member 11 to the oil storage portion 8.

Hereinafter, the discharge configuration of the lubricating oil will be described with reference to FIGS. 2 to 4.

The boss portion 20 of the bearing member 11 is lubricated with a sliding portion such as a bearing portion 19 of the bearing member 11 and a fitting portion between the eccentric shaft portion 5a of the rotating shaft 5 and the barrel portion 21 of the swivel scroll 13. An oil drainage passage 27 for discharging the subsequent oil is provided.

The oil drainage passage 27 is a space portion 3 between the motor portion 2 and the compression mechanism portion 4, and is opened in a recess 17a formed between the protruding piece portions 11a and 11b of the bearing member 11. It is provided. An oil drain pipe 28 bent downward in a substantially L shape is connected to the oil drain passage 27 toward the oil storage portion 8.

The oil drainage passage 27 and the oil drainage pipe 28 are the first recesses 17a as shown in FIG. 4 with respect to the rotation direction of the rotor 10 of the motor unit 2 from the refrigerant suction port 15 provided in the fixed scroll 12. It is provided so as to be located in. That is, the oil drain passage 27 and the oil drain pipe 28 are provided so as to be located in the recess 17a between the protruding pieces 11a and 11b. As shown in FIG. 2, the oil drain pipe 28 opens in the vicinity of the coil end 29 of the motor unit 2 facing the space 3 between the motor unit 2 and the compression mechanism unit 4.

The operation and effect of the sealed compressor 50 configured as described above will be described below.

The refrigerant sucked from the suction pipe 6 into the space 3 of the closed container 1 swirls around the space 3 and is sucked into the compression chamber 14 from the refrigerant suction port 15 of the fixed scroll 12 and compressed. Then, the refrigerant pushes up the valve 23, is discharged into the upper space in the closed container 1, and is sent out from the discharge pipe 7 to the external refrigeration cycle.

On the other hand, the fitting portion between the bearing portion 19 and the rotating shaft 5 of the bearing member 11 of the compression mechanism portion 4 for compressing the refrigerant, the fitting portion between the barrel portion 21 of the swivel scroll 13 and the eccentric shaft portion 5a, and the like. Oil is supplied to the sliding portion of the rotary shaft 5 via the lubricating oil passage 26 of the rotating shaft 5.

The oil after lubricating the sliding portion is a space portion between the motor portion 2 and the compression mechanism portion 4 via the boss portion 20 of the bearing member 11, the oil drain passage 27, and the oil drain pipe 28. It is discharged near the coil end 29 of the motor unit 2 facing No. 3. Then, the oil returns to the oil storage portion 8 at the bottom of the closed container 1 via the notch recess 9a or the like provided on the outer periphery of the stator 9 of the motor portion 2.

In the present embodiment, it is not necessary to increase the shape of the notch recess 9a on the outer peripheral portion of the stator 9 in order to pass the oil drain pipe 28, and it is possible to prevent a decrease in motor efficiency.

According to the above configuration, the lubricating oil is directly discharged from the oil drain pipe 28 to the upper end portion of the motor portion 2, that is, the space portion 3 between the motor portion 2 and the compression mechanism portion 4. However, the position where the lubricating oil is discharged is the most upstream side of the flow of the refrigerant that swirls with the rotation of the rotor 10 of the motor unit 2. Therefore, the distance until the refrigerant mixed with the lubricating oil discharged from the oil drain pipe 28 becomes a swirling flow and reaches the refrigerant suction port 15 of the fixed scroll 12 becomes long. Further, a plurality of recesses 17b, 17c, 17d formed between the protruding pieces 11a, 11b of the bearing member 11 until the refrigerant in the lubricating oil mixed state reaches the refrigerant suction port 15 of the fixed scroll 12. Exists.

Therefore, the refrigerant mixed with the lubricating oil from the oil drain pipe 28 swivels in the space 3 between the motor unit 2 and the compression mechanism unit 4 until it reaches the refrigerant suction port 15 of the fixed scroll 12. , The volume expands in a plurality of recesses 17b, 17c, 17d and disturbs the flow. The refrigerant mixed with the lubricating oil efficiently adheres to the inner peripheral surface of the closed container 1 and the coil end 29 of the motor unit 2 facing the plurality of recesses 17b, 17c, 17d, and the lubricating oil. And the refrigerant are separated. Therefore, it is possible to reduce the amount of lubricating oil that is sucked into the compression chamber 14 from the refrigerant suction port 15 while being mixed with the refrigerant, compressed, and discharged to the outside.

According to the sealed compressor 50 of the present embodiment, the outflow amount of the lubricating oil can be reduced without causing a decrease in the efficiency of the motor unit 2, and a highly efficient compressor can be realized.

According to the present embodiment, the oil drain pipe 28 is open in the vicinity of the coil end 29 of the motor unit 2. As a result, the lubricating oil released from the oil drain pipe 28 can be efficiently attached to the coil end 29 and separated from the refrigerant. Therefore, the circulation amount of the lubricating oil discharged to the outside can be suppressed more effectively, and a highly efficient sealed compressor can be realized. Further, since the tip of the oil drain pipe 28 is opened in the vicinity of the coil end 29 of the motor unit 2, assembly can be facilitated and productivity can be improved.

(Second Embodiment)
FIG. 5 is an enlarged cross-sectional view showing a main part of the closed compressor according to the second embodiment of the present disclosure.

The sealed compressor 150 of the present embodiment is configured by opening the oil drain pipe 128 in the vicinity of the end face of the stator 9 below the coil end 29 of the motor unit 2.

As a result, the lubricating oil from the oil drain pipe 128 is discharged to a place that is not easily affected by the swirling refrigerant flow generated in the space 3 between the motor unit 2 and the compression mechanism unit 4, and thus is mixed in the refrigerant. The amount of lubricating oil can be effectively suppressed. Therefore, the amount of lubricating oil flowing out to the outside can be further effectively reduced, and a highly efficient sealed compressor can be realized.

Other configurations, actions and effects are the same as those in the first embodiment, and the same parts are designated by the same numbers and the description thereof will be omitted.

Although the sealed compressor according to the present disclosure has been described above using the embodiments, the present disclosure is not limited to these.

For example, the bearing member 11 is provided with four recesses 17a, 17b, 17c, and 17d, but the present invention is not limited to this configuration. The number of recesses may be less than or greater than four.

Further, an example is shown in which all of the protruding piece portions 11a, 11b, 11c, 11d forming the recesses 17a, 17b, 17c, 17d are fixed to the inner peripheral surface of the closed container 1 by shrink fitting or welding. However, it is not limited to this configuration. When a large number of protruding piece portions 11a, 11b, 11c, 11d are provided, only a part of the protruding piece portions may be used and fixed to the inner peripheral surface of the closed container 1.

As described above, the embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present disclosure is indicated by the scope of claims, not the description described above, and is intended to include all modifications within the meaning and scope of the claims.

According to the present disclosure, the outflow amount of lubricating oil can be reduced without causing a decrease in the efficiency of the motor, so that a highly efficient sealed compressor can be realized. Therefore, it can be widely used in various devices using a refrigeration cycle and is useful.

1 Airtight container 2 Motor part 3 Space part 4 Compression mechanism part 5 Rotor shaft 5a Eccentric shaft part 6 Suction pipe 7 Discharge pipe 8 Oil storage part 9 Fixture 9a Notch recess 10 Rotor 11 Bearing member 11a, 11b, 11c, 11d One part 12 Fixed scroll 12a Fixed swirl wrap 13 Swirling scroll 13a Swirling swirl wrap 14 Compression chamber 15 Coolant suction port 16 Cover 17a, 17b, 17c, 17d Recess 19 Bearing part 20 Boss part 21 Shaft cylinder part 22 Discharge port 23 Valve 24 High pressure space 25 Centrifugal pump 26 Lubricating oil passage 27 Oil drain passage 28,128 Oil drain pipe 29 Coil end 30 Paddle 50,150 Sealed compressor

Claims (3)

A closed container with an oil storage unit for storing lubricating oil,
The motor unit provided in the closed container and
A compression mechanism portion arranged above the motor portion via a space portion, and a compression mechanism portion.
A suction pipe that sucks the refrigerant into the space between the motor and the compression mechanism.
A sealed compressor provided with a discharge pipe that discharges the refrigerant compressed by the compression mechanism to the outside.
The compression mechanism unit
Fixed scroll and
A swivel scroll that has a barrel and meshes with the fixed scroll to form a compression chamber.
A refrigerant suction port provided in the fixed scroll so that the refrigerant sucked into the space is sucked into the compression chamber.
A rotary shaft having an eccentric shaft portion and fitting the eccentric shaft portion to the shaft cylinder portion of the swivel scroll to swivel drive the swivel scroll.
A bearing member having a bearing portion that supports the fixed scroll and the swivel scroll and rotatably supports the rotating shaft.
Sliding including a first fitting portion between the bearing portion of the bearing member and the rotating shaft, and a second fitting portion between the barrel portion of the swivel scroll and the eccentric shaft portion of the rotating shaft. The section has a lubricating oil passage for supplying the lubricating oil from the oil storage section.
The bearing member has a plurality of projecting pieces extending in the outer peripheral direction, an oil drainage passage for discharging the lubricating oil after lubricating the sliding portion, and an oil drainage pipe connected to the oil drainage passage. , It is fixed to the inner peripheral surface of the closed container,
The oil drain passage and the oil drain pipe are provided in a recess between the plurality of protruding pieces that are first located in the rotational direction of the motor portion from the refrigerant suction port of the fixed scroll.
The oil drain pipe is a closed compressor that faces the space of the closed container and opens near the upper end of the motor. The closed compressor according to claim 1, wherein the oil drain pipe opens in the vicinity of the coil end of the motor portion. The closed compressor according to claim 1, wherein the oil drain pipe opens in the vicinity of the end face of the stator below the coil end of the motor portion.

Images