JP2020133429A - Compressor - Google Patents

Abstract

To provide a compressor capable of reducing an oil discharge amount to the outside of a sealed container, and suppressing deterioration in operation efficiency of the compressor resulting from oil.SOLUTION: A compressor comprises a sealed container and a rotary compression mechanism that is housed in the sealed container and repeats a refrigerant suction stroke and a compression stroke. The rotary compression mechanism has: a compression unit that has a compression chamber for compressing a refrigerant, a suction port for sucking the refrigerant into the compression chamber, and a blowout port for discharging the refrigerant compressed in the compression chamber; and an oil release mechanism unit that has a release part connecting the compression chamber and the internal space of the sealed container, and releases oil supplied into the compression chamber to the internal space by opening and closing the release part. The oil release mechanism unit opens the release part at predetermined timing at least in the compression stroke.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a compressor.

Conventionally, in a compressor used for applications such as air conditioning or freezing, a rotary compression mechanism having a cylinder, a roller, and a vane is provided. For example, in the rotary compression mechanism described in Patent Document 1, a configuration is disclosed in which a communication portion for allowing liquid to escape into a closed container is formed in a vane slot when the vane is separated from a roller due to liquid compression or the like inside a cylinder. Has been done.

Japanese Unexamined Patent Publication No. 2013-130061

By the way, oil is supplied to the compression chamber of the cylinder for internal lubrication and sealing, but in the compressor, the differential pressure between the closed container and the compression chamber becomes large, so the oil enters the compression chamber through the gap. The supply will also increase. As a result, there arises a problem that the oil supply to the compression chamber becomes excessive and the amount of oil discharged to the outside of the closed container increases. Further, when the oil supply to the compression chamber becomes excessive, the discharged oil becomes a passage resistance of the refrigerant, which causes a problem that the operating efficiency of the compressor is lowered.

An object of the present disclosure is to provide a compressor capable of reducing the amount of oil discharged to the outside of a closed container and suppressing a decrease in operating efficiency of the compressor due to oil.

The compressor according to the present disclosure is
A compressor including a closed container and a rotary compression mechanism housed in the closed container and repeatedly performing a refrigerant suction stroke and a compression stroke.
The rotary compression mechanism
A compression chamber for compressing the refrigerant, a suction port for sucking the refrigerant into the compression chamber, and a compression unit having a discharge port for discharging the refrigerant compressed in the compression chamber.
An oil release mechanism unit that has a release portion that communicates the compression chamber and the internal space of the closed container, and releases the oil supplied to the compression chamber to the internal space by opening and closing the release portion.
Have,
The oil release mechanism releases the release at least at a predetermined timing in the compression stroke.

According to the present disclosure, it is possible to reduce the amount of oil discharged to the outside of the closed container and suppress the decrease in the operating efficiency of the compressor due to the oil.

It is a vertical cross-sectional view which shows one aspect of the compressor which concerns on embodiment of this disclosure. It is sectional drawing of the rotary compression mechanism. It is a top view of a cylinder. It is a top view of the upper support member. It is a top view of the lower support member. It is an enlarged view of the release groove portion when the release groove is opened with respect to a compression chamber. It is a figure for demonstrating the suction stroke and the flow of a compression stroke of a rotary compression mechanism. It is a figure for demonstrating the suction stroke and the flow of a compression stroke of a rotary compression mechanism. It is a figure for demonstrating the suction stroke and the flow of a compression stroke of a rotary compression mechanism. It is a figure for demonstrating the suction stroke and the flow of a compression stroke of a rotary compression mechanism. It is a figure for demonstrating the suction stroke and the flow of a compression stroke of a rotary compression mechanism. It is a figure for demonstrating the suction stroke and the flow of a compression stroke of a rotary compression mechanism. It is a figure for demonstrating the suction stroke and the flow of a compression stroke of a rotary compression mechanism. It is a figure which shows the change of pressure with respect to the rotation angle of a high pressure chamber side in a compression stroke.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing an aspect of the compressor 1 according to the embodiment of the present disclosure.

As shown in FIG. 1, the compressor 1 is a single-stage rotary compressor, and has a closed container 10, an electric motor 20, and a rotary compression mechanism 30.

The closed container 10 has a main body portion 11, a lid portion 12, and a bottom portion 13. The main body 11 has a cylindrical shape, and houses the electric motor 20 and the rotational compression mechanism 30 inside. An introduction pipe 14 for introducing a refrigerant (for example, carbon dioxide) is provided near the lower end of the closed container 10. A discharge pipe 15 for discharging the compressed refrigerant to the outside of the machine is provided near the upper end of the closed container 10.

The lid portion 12 is provided so as to close the upper opening of the main body portion 11, and a terminal 16 for supplying electric power to the electric motor 20 is attached to the upper surface thereof.

The bottom portion 13 is provided so as to close the lower opening of the main body portion 11, and is configured to be able to store oil (for example, PAG (polyalkylene glycol)) inside.

The electric motor 20 is, for example, a DC motor, and is provided in the upper space of the main body 11. The electric motor 20 has a stator 21 and a rotor 22. The stator 21 has an annular shape and is provided along the inner peripheral surface of the main body 11.

The rotor 22 is provided inside the stator 21 and has a rotating shaft 23. The rotating shaft 23 is provided on the rotor 22 so as to pass through the center of the rotor 22, and extends in the vertical direction from the main body 11 to the bottom 13 of the closed container 10.

An oil pickup is provided at the lower end of the rotating shaft 23. The oil pickup is press-fitted and attached to the rotating shaft 23, and is configured to be able to suck up oil. The oil pickup sucks up the oil stored in the bottom 13 of the closed container 10 by the centrifugal force generated by the rotation of the rotating shaft 23.

The sucked up oil is supplied to a sliding portion of the rotary shaft 23 with the rotary compression mechanism 30 or the like through an oil supply hole formed in the oil pickup.

The rotational compression mechanism 30 is provided in the lower space of the main body 11, and as shown in FIG. 2, the cylinder 31, the roller 32, the vane 33, the urging member 34, the upper support member 35, and the lower portion It has a side support member 36.

The cylinder 31 has a cylindrical shape, and is integrally fixed to the upper support member 35 and the lower support member 36 between the upper support member 35 and the lower support member 36. As shown in FIG. 3, the cylinder 31 has a compression chamber 31A, a suction port 31B, a discharge port 31C, and a vane slot 31D. The cylinder 31 corresponds to the "compressed portion" of the present disclosure.

The compression chamber 31A is a portion for compressing the refrigerant, and is formed in a circular shape. The rotating shaft 23 of the electric motor 20 described above is passed through the compression chamber 31A.

The suction port 31B, the discharge port 31C, and the vane slot 31D communicate with each other at different positions on the inner peripheral surface of the compression chamber 31A.

The suction port 31B is a portion for sucking the refrigerant into the compression chamber 31A. The discharge port 31C is a portion for discharging the compressed refrigerant in the compression chamber 31A.

The vane slot 31D is configured to accommodate the vane 33 and the urging member 34. The vane slot 31D is provided at a position sandwiched between the suction port 31B and the discharge port 31C. In other words, the suction port 31B, the vane slot 31D, and the discharge port 31C are arranged in this order from the upstream side in the clockwise direction in FIG.

Returning to FIG. 2, the roller 32 is arranged in the compression chamber 31A (see FIG. 3) of the cylinder 31. The roller 32 is fitted into the eccentric portion provided on the rotating shaft 23, so that the roller 32 rotates eccentrically while contacting the inner peripheral surface of the cylinder 31. The roller 32 corresponds to the "rotating member" of the present disclosure.

The vane 33 is a member extending in a predetermined direction and is provided in the vane slot 31D. The vane 33 is provided so as to constantly press the roller 32 in a predetermined direction by being urged by an urging member 34 provided on the back side of the vane slot 31D.

By providing the vane 33 in this way, the eccentric rotation of the roller 32 causes the tip of the vane 33 to move back and forth into the compression chamber 31A while contacting the roller 32. When the vane 33 advances into the compression chamber 31A, the roller 32 in contact with the inner peripheral surface of the compression chamber 31A of the cylinder 31 and the vane 33 in contact with the roller 32 cause the inside of the compression chamber 31A to have a high pressure chamber and a low pressure chamber. It is divided into. The vane 33 corresponds to the "partition member" of the present disclosure.

Further, when the roller 32 comes into contact with the inner peripheral surface near the vane slot 31D, the vane 33 is pushed into the roller 32 and retracts into the vane slot 31D. The vane slot 31D corresponds to the "evacuation chamber" of the present disclosure.

The upper support member 35 and the lower support member 36 are fixed to the main body portion 11 (see also FIG. 1). The upper support member 35 is arranged so as to close the upper opening of the compression chamber 31A of the cylinder 31, and constitutes the top wall of the compression chamber 31A. As shown in FIG. 4, the upper support member 35 has a suction passage 35A, a discharge passage 35B, and a shaft hole 35C. The upper support member 35 corresponds to the "second wall member" of the present disclosure.

The suction passage 35A is a passage for sucking the refrigerant into the compression chamber 31A, and is configured so that the introduction pipe 14 described above can be inserted (see also FIG. 1). The suction passage 35A is provided at a position of the upper support member 35 corresponding to the suction port 31B of the cylinder 31 described above, and communicates with the compression chamber 31A via the suction port 31B.

The discharge passage 35B is a passage for discharging the refrigerant from the compression chamber 31A to the closed container 10. The discharge passage 35B is provided at a position corresponding to the discharge port 31C of the cylinder 31 on the upper support member 35, and communicates the compression chamber 31A and the internal space of the closed container 10 via the discharge port 31C. The discharge passage 35B corresponds to the "continuous passage" of the present disclosure.

The shaft hole 35C is a hole that rotatably supports the rotary shaft 23 of the electric motor 20 described above, and is formed in the central portion of the upper support member 35.

Returning to FIG. 2, the lower support member 36 is arranged so as to close the lower opening of the compression chamber 31A of the cylinder 31, and constitutes the bottom wall of the compression chamber 31A. As shown in FIG. 5, the lower support member 36 has a shaft hole 36A and a release groove 36B. The lower support member 36 corresponds to the "first wall member" of the present disclosure. The release groove 36B corresponds to the "release portion" of the present disclosure.

The shaft hole 36A is a hole that rotatably supports the rotary shaft 23 of the electric motor 20 described above, and is formed in the central portion of the lower support member 36.

The release groove 36B is a groove for releasing the oil supplied into the compression chamber 31A via the rotating shaft 23 or the like into the closed container 10. The release groove 36B is provided at a position corresponding to the vane slot 31D of the cylinder 31 described above in the lower support member 36. In other words, the release groove 36B is arranged at a position overlapping the vane 33 of the lower support member 36 when viewed from the axial direction (vertical direction) of the roller 32. More specifically, the release groove 36B is located on the discharge port 31C side with respect to the contact point between the roller 32 and the vane 33.

The release groove 36B extends from the end of the lower support member 36 in the extending direction of the vane 33 to a position corresponding to the compression chamber 31A. As shown in FIG. 6, the position corresponding to the compression chamber 31A is the position on the compression chamber 31A side of the tip of the vane 33 when the vane 33 is in the most retracted retracted position in the vane slot 31D.

That is, the release groove 36B is configured to be opened to the compression chamber 31A when the vane 33 is retracted into the vane slot 31D (see B shown in FIG. 6). Specifically, the release groove 36B is opened to the compression chamber 31A when the rotation angle of the roller 32 is within a predetermined range, and is closed to the compression chamber 31A outside the predetermined range. The rollers 32, vanes 33, and lower support member 36 correspond to the "oil release mechanism" of the present disclosure.

In the present embodiment, the predetermined range is a range of ± 12 degrees with respect to the rotation angle of the roller 32 when the vane 33 is in the retracted position. In other words, assuming that the rotation angle of the roller 32 at the retracted position of the vane 33 is 0 degrees, the rotation angle of the roller 32 of the release groove 36B is 0 degrees to 12 degrees (see FIGS. 7 and 8) and 348 degrees to 348 degrees. At 360 degrees (see FIGS. 12, 13 and 1), the compression chamber 31A is open.

In other words, the release groove 36B has a timing (rotation angle) when the roller 32 deviates by a predetermined angle (12 degrees) to the upstream side in the rotation direction with respect to the position of the roller 32 when the vane 33 moves to the retracted position. (When is 348 degrees), it is released. The timing when the roller 32 is deviated by 12 degrees to the upstream side in the rotation direction corresponds to the “predetermined timing” of the present disclosure. Note that FIG. 6 shows a state when the rotation angle of the roller 32 is 354 degrees.

In the rotary compression mechanism 30 configured in this way, the refrigerant from the introduction pipe 14 is supplied into the compression chamber 31A of the cylinder 31 via the suction passage 35A of the upper support member 35.

The refrigerant supplied into the compression chamber 31A moves from the low compression chamber side to the high compression chamber side due to the eccentric rotation of the roller 32, and is discharged into the closed container 10 through the discharge port 31C of the cylinder 31. After that, it is discharged from the discharge pipe 15 to the outside of the machine.

Next, the flow of oil release using the release groove 36B in the present embodiment will be described.

In the rotary compression mechanism 30, the suction stroke of sucking the refrigerant and the compression stroke of compressing the sucked refrigerant (including the stroke of discharging the refrigerant) are repeatedly performed as described above. These suction strokes and compression strokes are performed while the roller 32 makes one round in the compression chamber 31A.

First, the inhalation process will be described with reference to FIGS. 7 to 13. The position of the roller 32 shown in FIG. 7 is the position of the roller 32 (the above-mentioned retracted position) when the vane 33 is most retracted into the vane slot 31D by the roller 32.

Specifically, the position of the roller 32 shown in FIG. 7 is a position when the center of the roller 32 is located on a line passing through the midpoint of the width of the vane slot 31D and the center of the compression chamber 31A. When the roller 32 is in this position, the vane 33 retracts into the vane slot 31D, so that the inside of the compression chamber 31A is not partitioned by the vane 33. In the following description, it is assumed that the rotation angle of the roller 32 is 0 degrees (360 degrees) at the position shown in FIG.

As shown in FIG. 8, the roller 32 rotates counterclockwise from the position shown in FIG. 7 and moves to a position corresponding to the suction port 31B, which is a position where the rotation angle is deviated by 12 degrees. At this time, the suction port 31B is closed by the roller 32.

Then, as shown in FIG. 9, when the roller 32 further rotates in the counterclockwise direction, the suction port 31B opens. At this time, the suction of the refrigerant is started in the region on the suction port 31B side in the compression chamber 31A partitioned by the roller 32 and the vane 33. FIG. 9 shows a position where the rotation angle deviates from the position shown in FIG. 7 by 90 degrees.

Then, as shown in FIGS. 10 to 13, when the roller 32 further rotates in the counterclockwise direction, the region of the compression chamber 31A on the side where the suction port 31B is opened gradually expands.

FIG. 10 is a position where the rotation angle is deviated by 180 degrees from the position shown in FIG. FIG. 11 shows a position where the rotation angle deviates from the position shown in FIG. 7 by 270 degrees. FIG. 12 is a position where the rotation angle deviates from the position shown in FIG. 7 by 348 degrees. FIG. 13 is a position where the rotation angle deviates from the position shown in FIG. 7 by 354 degrees.

The region where the suction port 31B side is opened in the suction stroke corresponds to the low pressure chamber side of the high pressure chamber and the low pressure chamber partitioned by the vane 33. In the latter half of the suction stroke, the discharge port 31C is also opened in the region, but since the pressure in the region is lower than that in the closed container 10, the refrigerant is not discharged from the discharge port 31C into the closed container 10.

Then, when the roller 32 moves to the position shown in FIG. 8, that is, the position where the roller 32 closes the suction port 31B, the suction port 31B is closed and the suction stroke is completed. In addition, during the suction stroke, the compression stroke is simultaneously performed in the region on the discharge port 31C side partitioned by the vane 33.

Next, the compression stroke will be described with reference to FIGS. 7 to 13. When the roller 32 rotates counterclockwise from the position shown in FIG. 7, as shown in FIGS. 8 to 12, the region on the discharge port 31C side in the compression chamber 31A partitioned by the roller 32 and the vane 33 becomes It gradually narrows.

As a result, the pressure in the region gradually increases. That is, the region in the compression stroke corresponds to the high pressure chamber side of the high pressure chamber and the low pressure chamber partitioned by the vane 33.

The pressure change on the high pressure chamber side in the compression stroke changes as shown in FIG. 14, for example. The horizontal axis in FIG. 14 indicates the deviation of the rotation angle of the roller 32 with respect to the position shown in FIG.

As shown in FIG. 14, the pressure in the high pressure chamber gradually increases from the rotation angle of 12 degrees, which is the timing when the suction port 31B is closed, and when the rotation angle is around 180 degrees, as shown in FIG. It exceeds the pressure of the closed container 10.

Therefore, the refrigerant is discharged from this timing to the position shown in FIG. 7 through the discharge port 31C until the roller 32 returns. In the present embodiment, the rotation angle of the roller 32 from about 180 degrees to 360 degrees (0 degrees) is a discharge region in the compression stroke in which the pressure in the compression chamber 31A exceeds the pressure in the closed container 10.

Then, when the roller 32 returns to the position shown in FIG. 7, when the vane 33 moves to the retracted position in the vane slot 31D, the pressure in the compression chamber 31A drops and the compression stroke ends. That is, the vane 33 moves to the retracted position at the timing when the compression stroke ends due to the rotation of the roller 32.

After that, the roller 32 rotates and the suction stroke is started again. During the compression stroke, the suction stroke is performed at the same time in the region on the suction port 31B side partitioned by the vane 33.

By the way, oil is supplied into the compression chamber 31A of the cylinder 31, but since the pressure fluctuates in the compression chamber 31A as described above, the differential pressure between the closed container 10 and the compression chamber 31A becomes large. In some cases. Therefore, oil is supplied into the compression chamber 31A through the gaps between the members of the rotary compression mechanism 30, so that the oil supply into the compression chamber 31A may become excessive.

In the compression stroke, the pressure in the compression chamber 31A becomes higher than the pressure in the closed container 10, so that oil is discharged from the compression chamber 31A together with the refrigerant.

In the present embodiment, the release groove 36B is opened with respect to the compression chamber 31A when the rotation angle of the roller 32 in FIGS. 12, 13 and 7 in the compression stroke is in the range of 348 degrees to 360 degrees.

In other words, the roller 32 and the vane 33 open the release groove 36B at a predetermined timing in which the rotation angle of the roller 32 is 348 degrees in the compression stroke. As a result, the oil can be released from the compression chamber 31A through the release groove 36B.

Further, in the case of the configuration without the release groove 36B, the oil is discharged together with the refrigerant from the discharge port 31C. Therefore, if the oil supply into the compression chamber 31A becomes excessive, the amount of oil discharged to the outside of the closed container 10 increases. The problem of increasing the number arises. Further, in the case of the configuration without the release groove 36B, the influence of the oil moved to the discharge port 31C side causes a passage resistance in the discharge path of the refrigerant, which causes a problem that the operating efficiency of the compressor 1 is lowered.

On the other hand, in the present embodiment, since the oil can be released through the release groove 36B, the amount of oil discharged to the outside of the closed container 10 can be reduced. Further, as the oil discharge amount is reduced, the passage resistance in the refrigerant discharge path can be reduced, and by extension, overcompression due to the presence of oil can be prevented and the decrease in the operating efficiency of the compressor 1 can be suppressed. it can.

Further, in the present embodiment, the release groove 36B is opened even when the rotation angle of the roller 32 is in the range of 348 degrees to 360 degrees and 0 degrees to 12 degrees. In other words, the roller 32 and the vane 33 close the release groove 36B from the opening of the release groove 36B in the compression stroke to the start timing of the next suction stroke.

Therefore, it is possible to prevent the refrigerant sucked into the compression chamber 31A from leaking to the outside of the cylinder 31 through the release groove 36B in the suction stroke.

Further, when the rotation angle of the roller 32 becomes 0 degrees (360 degrees), the inside of the compression chamber 31A is not partitioned by the vanes 33, so that the pressure of the entire compression chamber 31A decreases (see FIG. 14).

Therefore, even if the release groove 36B is opened in a minute time after the end timing of the compression stroke, it is possible to prevent the refrigerant sucked into the compression chamber 31A from leaking to the outside of the cylinder 31 through the release groove 36B. it can.

Further, in the compression stroke, since the release groove 36B is opened only at the timing just before the end of the compression stroke, it is possible to prevent the oil from being released too much.

Further, since the release hole 36B is provided separately from the discharge port 31C, it is possible to easily separate the discharged refrigerant and the released oil.

Specifically, since the release groove 36B is provided in the lower support member 36, it is possible to easily guide the oil to the release groove 36B by utilizing the weight of the oil itself. As a result, it is possible to easily separate the discharged refrigerant and the released oil.

Further, since the release groove 36B has a groove shape, it is possible to prevent the oil from returning too much into the closed container 10 by utilizing the passage resistance in the groove.

Further, since the release groove 36B is located on the discharge port 31C side with respect to the contact point between the roller 32 and the vane 33, the release groove 36B is opened on the high pressure chamber side in the compression stroke. As a result, the oil can be easily released to the outside of the cylinder 31.

In the above embodiment, the roller 32, the vane 33, and the lower support member 36 are exemplified as the oil release mechanism portion, but the present disclosure is not limited to this. For example, the oil release mechanism portion is other than the roller 32, the vane 33, and the lower support member 36, such as a mechanism having a shutter member capable of opening and closing the release portion communicating with the compression chamber regardless of the movement of the roller 32 and the vane 33. It may be a mechanism.

Further, in the above embodiment, the release groove 36B having a groove shape is illustrated as the release portion, but the present disclosure is not limited to this, and for example, a hole-shaped release portion may be used.

Further, in the above embodiment, the release groove 36B is provided in the lower support member 36, but the present disclosure is not limited to this, and the release groove 36B may be provided in the upper support member 35.

Further, in the above embodiment, the timing at which the rotation angle of the roller 32 becomes 348 degrees is set as a predetermined timing, but the present disclosure is not limited to this, and is different as long as the timing includes the discharge region in the compression stroke. It may be the timing of. That is, the predetermined angle may be an angle other than 12 degrees.

Further, in the above embodiment, as a predetermined position, a retracted position in which the vane 33 is most retracted in the vane slot 31D with respect to the compression chamber 31A is illustrated, but the present disclosure is not limited to this, and other than the above retracted position. It may be in the position of.

Further, in the above embodiment, the release groove 36B is opened between the compression stroke and the start timing of the next suction stroke, but the present disclosure is not limited to this, and the release is limited to the compression stroke. The groove 36B may be open.

Further, in the above embodiment, a single-stage rotary compressor is exemplified as the compressor, but the present disclosure is not limited to this, and for example, a multi-stage rotary compressor may be used.

In addition, the above-described embodiments are merely examples of embodiment of the present disclosure, and the technical scope of the present disclosure should not be construed in a limited manner by these. That is, the present disclosure can be implemented in various forms without departing from its gist or its main features.

The compressor of the present disclosure is useful as a compressor capable of reducing the amount of oil discharged to the outside of a closed container and suppressing a decrease in operating efficiency of the compressor due to oil.

1 Compressor 10 Closed container 11 Main body 12 Lid 13 Bottom 14 Introduction pipe 15 Discharge pipe 16 Terminal 20 Electric motor 21 Stator 22 Rotor 23 Rotating shaft 30 Rotating compression mechanism 31 Cylinder 31A Compression chamber 31B Suction port 31C Discharge port 31D Vane slot 32 Roller 33 vane 34 urging member 35 upper support member 35A suction passage 35B discharge passage 35C shaft hole 36 lower support member 36A shaft hole 36B release groove

Claims (9)

A compressor including a closed container and a rotary compression mechanism housed in the closed container and repeatedly performing a refrigerant suction stroke and a compression stroke.
The rotary compression mechanism
A compression chamber for compressing the refrigerant, a suction port for sucking the refrigerant into the compression chamber, and a compression unit having a discharge port for discharging the refrigerant compressed in the compression chamber.
An oil release mechanism unit that has a release portion that communicates the compression chamber and the internal space of the closed container, and releases the oil supplied to the compression chamber to the internal space by opening and closing the release portion.
Have,
The oil release mechanism releases the release at least at a predetermined timing in the compression stroke.
Compressor. The oil release mechanism is
A rotating member that rotates eccentrically while contacting the inner peripheral surface of the compression chamber,
A partition member that advances and retreats between the evacuation chamber communicating with the compression chamber and the compression chamber in the compression unit while contacting the rotating member, and partitions the compression chamber into a high pressure chamber and a low pressure chamber.
A first wall member constituting one of the top wall and the bottom wall of the compression chamber,
Have,
The release part
It is arranged at a position overlapping the partition member in the first wall member when viewed from the axial direction of the rotating member.
It is opened and closed by the movement of the partition member accompanying the rotation of the rotating member.
The compressor according to claim 1. The release portion is configured to be released at the timing when the partition member is retracted into the evacuation chamber by the rotating member.
The compressor according to claim 2. The partition member moves to a predetermined position at the timing when the compression stroke ends due to the rotation of the rotating member.
The release portion is configured to be opened to the compression chamber from the predetermined timing to at least the timing at which the compression stroke ends.
The compressor according to claim 3. The predetermined timing is a timing when the rotating member deviates from the position of the rotating member when the partition member moves to the retracted position by a predetermined angle on the upstream side in the rotation direction.
The compressor according to claim 4. A second wall member constituting the other of the top wall and the bottom wall of the compression chamber is provided.
The second wall member has a connecting passage that communicates the discharge port and the internal space of the closed container.
The compressor according to any one of claims 2 to 5. The first wall member is located below the compression portion.
The compressor according to claim 6. The release portion has a groove shape.
The compressor according to any one of claims 1 to 7. The oil release mechanism portion closes the release portion after opening the release portion in the compression stroke and before the start timing of the next suction stroke.
The compressor according to any one of claims 1 to 8.

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