JP2008038766A - Compressor - Google Patents

Abstract

Disclosed is a compressor that can be easily sintered at low cost.
A cylinder chamber 22 is partitioned into a refrigerant gas suction chamber 23 and a refrigerant gas discharge chamber 24 by a roller 27 and a blade 28 integrally attached to the roller 27. The roller 27 is provided with a silencing chamber 70 and a communication passage 80 that opens into the cylinder chamber 22 and communicates the silencing chamber 70 with the cylinder chamber 22. Therefore, if the silencing chamber 70 and the communication passage 80 are to be formed without machining, the roller 27 needs to be manufactured by sintering, but the roller 27 is smaller than the cylinder 21. Therefore, as compared with the sintering of the cylinder 21, the roller 27 is easily sintered. At the same time, the amount of expensive sintered material used can be reduced.
[Selection] Figure 2

Description

  The present invention relates to a compressor used in, for example, an air conditioner or a refrigerator.

  Conventionally, as a compressor, a cylinder having a cylinder chamber, a roller that moves around the central axis of the cylinder chamber along the inner surface of the cylinder chamber, and a cylinder chamber that is integrally attached to the roller and the cylinder chamber together with the roller Is provided with a blade that partitions the refrigerant gas into a refrigerant gas suction chamber and a refrigerant gas discharge chamber (see JP 2002-213355 A).

The cylinder and the end plate portion attached to the opening end of the cylinder are provided with a sound deadening chamber and a communication passage that opens to the cylinder chamber and communicates the sound deadening chamber with the cylinder chamber.
JP 2002-213355 A

  However, in the conventional compressor, since the silencer chamber and the communication passage are provided in the cylinder and the end plate portion, if the silencer chamber and the communication passage are to be formed without machining, Since it is necessary to manufacture the cylinder and the end plate part by sintering, and the cylinder and the end plate part are larger parts than the roller, the cylinder and the end plate part are sintered. Larger sintering equipment is needed and difficult to make the roller by sintering. At the same time, a large amount of expensive sintered material was used.

  Therefore, the manufacture of the cylinder and the end plate portion is difficult and expensive, and the manufacture of the compressor is difficult and expensive.

  Therefore, an object of the present invention is to provide a compressor that can be easily sintered and can be manufactured easily and inexpensively.

In order to solve the above problems, the compressor of the present invention is:
A cylinder having a cylinder chamber; a roller that moves around the central axis of the cylinder chamber along the inner surface of the cylinder chamber; and the cylinder chamber that is integrally attached to the roller and that serves as a refrigerant gas suction chamber together with the roller. A blade that partitions the refrigerant gas discharge chamber;
The roller is provided with a silencing chamber and a communication passage that opens into the cylinder chamber and communicates the silencing chamber with the cylinder chamber.

  According to the compressor of the present invention, the roller is provided with the silencing chamber and the communication passage that opens into the cylinder chamber and communicates the silencing chamber with the cylinder chamber. When trying to form the communication path without machining, it is necessary to manufacture the roller by sintering, but the roller is in comparison with the cylinder or the end plate attached to the open end of the cylinder. Because of its small size, the roller can be easily sintered as compared with the cylinder and the end plate. At the same time, the amount of expensive sintered material used can be reduced. Therefore, the roller can be easily and inexpensively manufactured, and the compressor can be easily and inexpensively manufactured.

  Moreover, in the compressor of one Embodiment, while the said communication channel opens only in the surrounding surface and end surface of the said roller, the said noise reduction chamber is opened only in the end surface of the said roller.

  According to the compressor of this embodiment, the communication path opens only on the peripheral surface and end surface of the roller, whereas the silencer chamber opens only on the end surface of the roller. The silencing chamber and the communication passage can be easily formed, and the roller can be manufactured more easily.

  Moreover, in the compressor of one Embodiment, while the said communicating path opens only in the surrounding surface of the said roller, the said noise reduction chamber is opened only in the end surface of the said roller.

  According to the compressor of this embodiment, the communication passage is opened only on the peripheral surface of the roller, while the silencer chamber is opened only on the end surface of the roller, thereby increasing the rigidity of the roller. Can do.

  Moreover, in the compressor of one Embodiment, the said silencing chamber and the said communicating path are integrally formed in one space, and this space is opened only to the surrounding surface of the said roller.

  According to the compressor of this embodiment, the silencer chamber and the communication passage are integrally formed as one space, and this space is opened only on the peripheral surface of the roller. The above-mentioned roller can be manufactured more easily.

  Moreover, in the compressor of one Embodiment, the said roller consists of a sintered material.

  According to the compressor of this embodiment, since the roller is made of a sintered material, the noise reduction chamber and the communication passage can be formed at a time together with the roller.

  Further, in the compressor according to an embodiment, the opening of the communication passage to the cylinder chamber is configured to suck refrigerant gas in the cylinder chamber from the center line of the blade as viewed from the center axis of the cylinder chamber. On the side.

  According to the compressor of this embodiment, the opening to the cylinder chamber of the communication passage is more suctioned of refrigerant gas in the cylinder chamber than the center line of the blade as viewed from the direction of the central axis of the cylinder chamber. Therefore, the compression rate of the refrigerant gas compressed in the discharge chamber and confined in the silencer chamber can be reduced. Therefore, when the refrigerant gas in the muffler chamber is re-expanded in the suction chamber, the expansion rate of the refrigerant gas in the suction chamber is small, so that the compression loss can be reduced.

  Moreover, in the compressor of one Embodiment, the said communicating path is opening in the lowest end part of the said muffling chamber.

  According to the compressor of this embodiment, since the communication passage opens at the lowermost end portion of the silencer chamber, the silencer chamber lubricates the roller peripheral surface and the roller end surface, and the discharge passage. The chamber and the suction chamber are sealed with the roller outer peripheral surface and the roller end surface, and there is no dent in which lubricating oil is collected for sealing the roller inner peripheral surface side space and the cylinder chamber with the roller end surface. Therefore, every time the refrigerant gas compressed in the discharge chamber is re-expanded from the muffler chamber to the suction chamber, the lubricating oil in the muffler chamber is discharged together with the re-expanded refrigerant gas. The lubricating oil does not collect in the silencer chamber, and the volume of the silencer chamber can be maintained.

  Moreover, in the compressor of one Embodiment, the refrigerant gas in the said airtight container is a carbon dioxide.

  According to the compressor of this embodiment, since the refrigerant gas in the closed container is carbon dioxide, a high-pressure refrigerant gas is used, but the pulsation of the refrigerant gas generated by being compressed in the cylinder chamber is The noise reduction chamber can eliminate the noise and vibration of the compressor due to pulsation.

  According to the compressor of the present invention, the roller is provided with the silencer chamber and the communication passage that opens into the cylinder chamber and communicates the silencer chamber with the cylinder chamber. Consolidation is easy and the compressor can be manufactured easily and inexpensively.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

(First embodiment)
FIG. 1 is a longitudinal sectional view showing a first embodiment of a compressor according to the present invention. The compressor includes a hermetic container 1, a compression element 2 disposed in the hermetic container 1, and a motor 3 that is disposed in the hermetic container 1 and drives the compression element 2 via a shaft 12. I have.

  This compressor is a so-called vertical high-pressure dome type rotary compressor, in which the compression element 2 is placed down and the motor 3 is placed up in the sealed container 1. That is, the compressor is arranged such that the axis 12a of the shaft 12 is in the vertical direction. The rotor 6 of the motor 3 drives the compression element 2 via the shaft 12.

  The compression element 2 sucks refrigerant gas from the accumulator 10 through the suction pipe 11. The refrigerant gas is obtained by controlling a condenser, an expansion mechanism, and an evaporator (not shown) that constitute an air conditioner as an example of a refrigeration system together with the compressor. This refrigerant is, for example, carbon dioxide, R410A, or R22.

  The compressor discharges the compressed high-temperature and high-pressure refrigerant gas from the compression element 2 to fill the inside of the hermetic container 1, and passes the gap between the stator 5 and the rotor 6 of the motor 3 through the motor. 3 is cooled, and then discharged from the discharge pipe 13 provided on the upper side of the motor 3 to the outside.

  An oil reservoir 9 in which lubricating oil is stored is formed in the lower portion of the high-pressure region in the closed container 1. This lubricating oil moves from the oil reservoir portion 9 through an oil passage (not shown) provided in the shaft 12 to a sliding portion such as the bearing of the compression element 2 or the motor 3. Lubricate the sliding part. This lubricating oil is, for example, a polyalkylene glycol oil (such as polyethylene glycol or polypropylene glycol), an ether oil, an ester oil, or a mineral oil. The oil passage is, for example, a spiral groove provided on the outer peripheral surface of the shaft 12 or a hole provided in the shaft 12.

  The motor 3 includes the rotor 6 and the stator 5 disposed on the radially outer side of the rotor 6 via an air gap.

  The rotor 6 includes a rotor core 610 and a plurality of magnets embedded in the rotor core 610. The rotor core 610 has a cylindrical shape and is made of, for example, laminated electromagnetic steel plates. The shaft 12 is attached to the central hole of the rotor core 610. The magnet is a flat permanent magnet. The plurality of magnets are arranged at equally spaced center angles in the circumferential direction of the rotor core 610.

  The stator 5 includes a stator core 510 and a coil 520 wound around the stator core 510. The stator core 510 is composed of a plurality of laminated steel plates, and is fitted into the sealed container 1 by press fitting or shrink fitting. The rotor 6 is rotated together with the shaft 12 by an electromagnetic force generated in the stator 5 by passing a current through the coil 520.

  The compression element 2 includes a cylinder 21 that is attached to the inner surface of the sealed container 1, and an upper end plate portion 50 and a lower end plate portion 60 that are attached to the upper and lower open ends of the cylinder 21. Prepare. A cylinder chamber 22 is formed by the cylinder 21, the upper end plate portion 50, and the lower end plate portion 60.

  The upper end plate portion 50 includes a disc-shaped main body portion 51 and a boss portion 52 provided upward in the center of the main body portion 51. The main body 51 and the boss 52 are inserted through the shaft 12.

  The main body 51 is provided with a discharge port 51 a communicating with the cylinder chamber 22. A discharge valve 31 is attached to the main body 51 so as to be located on the opposite side of the main body 51 from the cylinder 21. The discharge valve 31 is, for example, a reed valve, and opens and closes the discharge port 51a.

  A cup-type muffler cover 40 is attached to the main body 51 so as to cover the discharge valve 31 on the side opposite to the cylinder 21. The muffler cover 40 is fixed to the main body 51 by a fixing member 35 (such as a bolt). The muffler cover 40 is inserted through the boss portion 52.

  A muffler chamber 42 is formed by the muffler cover 40 and the upper end plate portion 50. The muffler chamber 42 and the cylinder chamber 22 communicate with each other via the discharge port 51a.

  The muffler cover 40 has a hole 43. The hole 43 communicates the muffler chamber 42 with the outside of the muffler cover 40.

  The lower end plate portion 60 includes a disc-shaped main body portion 61 and a boss portion 62 provided downward in the center of the main body portion 61. The main body 61 and the boss 62 are inserted through the shaft 12.

  In short, one end portion of the shaft 12 is supported by the upper end plate portion 50 and the lower end plate portion 60. That is, the shaft 12 is cantilevered. One end portion (support end side) of the shaft 12 enters the cylinder chamber 22.

  An eccentric pin 26 is provided on the support end side of the shaft 12 so as to be positioned in the cylinder chamber 22 on the compression element 2 side. The eccentric pin 26 is fitted to the roller 27. The roller 27 is disposed so as to be able to revolve in the cylinder chamber 22, and performs a compression action by the revolving motion of the roller 27.

  Next, the compression action of the cylinder chamber 22 will be described.

  As shown in FIG. 2, the cylinder chamber 22 is partitioned by a blade 28 provided integrally with the roller 27. That is, in the chamber on the right side of the blade 28, the suction pipe 11 opens on the inner surface of the cylinder chamber 22 to form a suction chamber (low pressure chamber) 23. On the other hand, in the chamber on the left side of the blade 28, the discharge port 51 a (shown in FIG. 1) opens on the inner surface of the cylinder chamber 22 to form a discharge chamber (high pressure chamber) 24.

  Semi-cylindrical bushes 25, 25 are in close contact with both surfaces of the blade 28 for sealing. The blade 28 and the bushes 25, 25 are lubricated with the lubricating oil.

  Then, the eccentric pin 26 rotates eccentrically with the shaft 12, and the roller 27 fitted to the eccentric pin 26 contacts the outer peripheral surface of the roller 27 with the inner peripheral surface of the cylinder chamber 22, Revolve. That is, the roller 27 revolves around the central axis 12 a of the shaft 12 along the inner surface of the cylinder chamber 22.

  As the roller 27 revolves in the cylinder chamber 22, the blade 28 advances and retreats with both side surfaces of the blade 28 being held by the bushes 25, 25. Then, a low-pressure refrigerant gas is sucked into the suction chamber 23 from the suction pipe 11 and compressed to a high pressure in the discharge chamber 24, and then the high-pressure refrigerant gas is discharged from the discharge port 51a (shown in FIG. 1). Discharge.

  Thereafter, as shown in FIG. 1, the refrigerant gas discharged from the discharge port 51 a is discharged to the outside of the muffler cover 40 through the muffler chamber 52.

  As shown in FIGS. 2 and 3, between the outer peripheral surface of the roller 27 and the inner peripheral surface of the cylinder chamber 22, there is a seal separating the lubrication and the high and low pressures of the suction chamber 23 and the discharge chamber 24. The above-mentioned lubricating oil that also serves as is interposed. Further, between the end surface of the roller 27 and the end plate portions 50 and 60, lubrication, a seal separating the high and low pressures of the suction chamber 23 and the discharge chamber 24, an inner peripheral surface of the roller 27, The lubricating oil serving as a seal that separates the roller inner space 100 formed by the eccentric pin 26 and the end plate portions 50 and 60 from the cylinder chamber 22 is interposed.

  The roller 27 is provided with a silencing chamber 70 and a communication passage 80 that opens into the cylinder chamber 22 and communicates the silencing chamber 70 with the cylinder chamber 22. Since the gap between the end surface of the roller 27 and the end plate portions 50 and 60 is sealed by the lubricating oil, the sound deadening chamber 70 and the communication passage 80 do not communicate with the roller inner space 100, The pressure difference between the silencer chamber 70 and the communication passage 80 and the roller inner space 100 can be maintained. The roller 27 is made of a sintered material.

  The communication passage 80 is formed in a groove shape that opens only on the peripheral surface and the upper end surface of the roller 27 and extends in the radial direction of the roller 27. The silencing chamber 70 is formed in a substantially cylindrical shape that opens only in the upper end surface of the roller 27 and extends in the thickness direction of the roller 27. The communication passage 80 is connected to the upper end of the sound deadening chamber 70. The bottom of the muffler chamber 70 is located deeper than the bottom of the communication passage 80.

  The opening of the communication passage 80 to the cylinder chamber 22 is closer to the refrigerant gas suction side of the cylinder chamber 22 than the center line 28a of the blade 28 when viewed from the direction of the center axis 22a of the cylinder chamber 22 (that is, , On the suction chamber 23 side).

  Here, when the compressor operates, pulsation occurs in the refrigerant gas compressed in the cylinder chamber 22. This pulsation is a cause of compressor noise and vibration. However, the cylinder chamber 22 communicates with the muffler chamber 70 via the communication passage 80.

  Therefore, the pulsation generated in the refrigerant gas compressed in the cylinder chamber 22 is guided to the sound deadening chamber 70 through the communication passage 80. That is, since the opening of the upper end surface of the roller 27 in the silencing chamber 70 and the opening of the upper end surface of the roller 27 of the communication passage 80 are closed by the upper end plate portion 50, the pulsation is reduced. The sound deadening chamber 70 can be reliably guided. As a result, the silencing effect of the silencing chamber 70 is sufficiently exhibited, and noise and vibration due to the pulsation of the refrigerant gas are effectively reduced.

  According to the compressor configured as described above, the roller 27 is provided with the silencing chamber 70 and the communication passage 80 that opens into the cylinder chamber 22 and communicates the silencing chamber 70 with the cylinder chamber 22. Therefore, if the silencing chamber 70 and the communication passage 80 are to be formed without machining, the roller 27 needs to be manufactured by sintering. However, the roller 27 may be the cylinder 21 or the end plate portion. Compared to the sintering of the cylinder 21 and the end plate portions 50 and 60, the roller 27 is easily sintered as compared with 50 and 60. At the same time, the amount of expensive sintered material used can be reduced. Therefore, the roller 27 can be manufactured easily and inexpensively, and the compressor can be manufactured easily and inexpensively.

  Further, this compressor is a so-called swing compressor, and the roller 27 does not rotate, and the relative contact position between the cylinder 21 and the roller 27 does not always change. Therefore, the silencing chamber 70 and the communication passage are not changed. Even if 80 is provided on the roller 27, each time the roller 27 revolves in the cylinder chamber 22, the communication passage 80 is always opened to the suction chamber 23 at the same position. The characteristic does not change.

  Further, the communication passage 80 opens only on the peripheral surface and end surface of the roller 27, while the silencing chamber 70 opens only on the end surface of the roller 27. The formation of the communication passage 80 is facilitated, and the roller 27 can be manufactured more easily.

  In addition, since the roller 27 is made of a sintered material, the silencer chamber 70 and the communication passage 80 can be formed together with the roller 27 at a time. In addition, the sound deadening chamber 70 can be formed in a more complicated shape than by machining. That is, the silencing chamber 70 can be formed into an appropriate shape corresponding to the vibration characteristics of the compressor, and the silencing effect can be improved.

  The opening of the communication passage 80 to the cylinder chamber 22 is closer to the refrigerant gas suction side of the cylinder chamber 22 than the center line 28a of the blade 28 when viewed from the center axis 22a of the cylinder chamber 22. Therefore, the compression rate of the refrigerant gas compressed in the discharge chamber 24 and confined in the silencer chamber 70 can be reduced. Therefore, when the refrigerant gas in the muffler chamber 70 is re-expanded in the suction chamber 23, the expansion rate of the refrigerant gas in the suction chamber 23 is small, so that the compression loss can be reduced.

  Further, when the refrigerant gas in the sealed container 1 is carbon dioxide, a high-pressure refrigerant gas is used, but the pulsation of the refrigerant gas generated by being compressed in the cylinder chamber 22 is extinguished by the silencing chamber 70. And noise and vibration of the compressor due to pulsation can be reliably reduced.

(Second Embodiment)
4A and 4B show a second embodiment of the compressor of the present invention. The difference from the first embodiment (FIGS. 2 and 3) will be described. In the second embodiment, the shape of the roller is different.

  In the roller 127 of the second embodiment, the communication passage 81 opens only on the peripheral surface and the upper end surface of the roller 127, while the muffler chamber 71 opens only on the upper end surface of the roller 127.

  The communication passage 81 is formed in a groove shape extending in the radial direction of the roller 127. The silencing chamber 71 is formed in a substantially cylindrical shape extending in the thickness direction of the roller 127. The bottom of the sound deadening chamber 71 is at the same height as the bottom of the communication passage 81.

  Therefore, the silencing chamber 71 and the communication passage 81 can be more easily formed by sintering, and the roller 127 can be manufactured more easily.

  The relative positions of the muffler chamber 71 and the communication passage 81 with respect to the blade 128 are the same as those in the first embodiment.

(Third embodiment)
5A and 5B show a third embodiment of the compressor of the present invention. The difference from the second embodiment (FIGS. 4A and 4B) will be described. In the third embodiment, the roller shape is different.

  In the roller 227 of the third embodiment, the silencing chamber 72 and the communication passage 82 having the same shapes as the silencing chamber 71 and the communication passage 81 of the second embodiment are respectively provided on the upper and lower end surfaces of the roller 227. Is provided.

Therefore, the volume can be increased as compared with the case where the silencing chamber 72 and the communication passage 82 are provided on one end surface of the roller 227, and noise and vibration caused by the pulsation of the refrigerant gas can be further reduced. Further, if the silencer chamber 72 and the communication passage 82 on the upper and lower end surfaces of the roller 227 have the same shape, the sliding characteristics of the upper and lower end surfaces of the roller 227 can be made the same.
The relative positions of the sound deadening chamber 72 and the communication passage 82 with respect to the blade 228 are the same as those in the second embodiment. The relative positions of the silencing chamber 72 and the communication passage 82 with respect to the blade 228 may be different from each other in the positional relationship between the upper and lower silencing chambers 72 and the communication passage 82.

(Fourth embodiment)
6A and 6B show a fourth embodiment of the compressor of the present invention. The difference from the first embodiment (FIGS. 2 and 3) will be described. In the fourth embodiment, the roller shape is different.

  In the roller 327 of the fourth embodiment, the communication passage 83 opens only in the circumferential surface of the roller 327 at the center position in the width direction of the roller 327, while the sound deadening chamber 73 is only in the upper end surface of the roller 327. It is open.

  The communication path 83 is formed in a substantially cylindrical shape extending in the radial direction of the roller 327. The silencing chamber 73 is formed in a substantially cylindrical shape extending in the thickness direction of the roller 327. The communication passage 83 is connected to the lower end of the muffler chamber 73. The bottom of the sound deadening chamber 73 is at the same height as the bottom of the communication passage 83.

  Therefore, the rigidity of the roller 327 can be increased. The relative positions of the muffler chamber 73 and the communication passage 83 with respect to the blade 328 are the same as those in the first embodiment.

(Fifth embodiment)
7A and 7B show a fifth embodiment of the compressor of the present invention. The difference from the fourth embodiment (FIGS. 6A and 6B) will be described. In the fifth embodiment, the shape of the roller is different.

  In the roller 427 of the fifth embodiment, the sound deadening chamber 74 opens only in the upper and lower end surfaces of the roller 427, and the communication passage 84 communicates with the central portion in the height direction of the sound deadening chamber 74.

  Therefore, the volume can be increased as compared with the case where the sound deadening chamber 74 passes through only one end face of the roller 427, and noise and vibration caused by the pulsation of the refrigerant gas can be further reduced. The silencing chamber 74 penetrating the upper and lower end surfaces of the roller 427 can have the same shape, and the sliding characteristics of the upper and lower end surfaces of the roller 427 can be the same. The relative positions of the sound deadening chamber 74 and the communication passage 84 with respect to the blade 428 are the same as those in the fourth embodiment.

(Sixth embodiment)
8A and 8B show a sixth embodiment of the compressor of the present invention. The difference from the first embodiment (FIGS. 2 and 3) will be described. In the sixth embodiment, the shape of the roller is different.

  In the roller 527 of the sixth embodiment, the sound deadening chamber 75 and the communication passage 85 are integrally formed by one space 90, and this space 90 is opened only on the peripheral surface of the roller 527. . The shape of the space 90 is a substantially prismatic shape.

Therefore, the rigidity of the roller 527 can be increased and the roller 527 can be manufactured more easily. The relative positions of the sound deadening chamber 75 and the communication passage 85 with respect to the blade 528 are the same as those in the first embodiment.
Here, in each of the second to fourth embodiments (FIGS. 4A, 4B to 6A, 6B), the communication passages 81, 82, 83 are the lowermost ends of the muffle chambers 71, 72, 73, respectively. Is open.
Accordingly, the sound deadening chambers 71, 72, 73 are lubricated on the peripheral surfaces of the rollers 127, 227, 327 and the end surfaces of the rollers 127, 227, 327, and the discharge chamber 24 and the suction chamber 23 are connected to the roller 127. , 227, 327 and the outer surfaces of the rollers 127, 227, 327, and the inner surfaces of the rollers 127, 227, 327 and the cylinder chamber 22 are sealed by the end surfaces of the rollers 127, 227, 327. There is no dent for lubricating oil to accumulate. For this reason, every time the refrigerant gas compressed in the discharge chamber 24 is re-expanded from the silence chambers 71, 72, 73 to the suction chamber 23, the lubricating oil in the silence chambers 71, 72, 73 is Since the refrigerant gas is discharged together with the re-expanded refrigerant gas, the lubricating oil does not accumulate in the muffler chambers 71, 72, 73, and the volume of the muffler chambers 71, 72, 73 can be maintained.
Similarly, in the fifth embodiment (FIGS. 7A and 7B), the communication passage 84 may be opened at the lowermost end portion of the sound deadening chamber 74.

  In addition, this invention is not limited to the above-mentioned embodiment. For example, the roller is not limited to a sintered material. For example, the roller may be made of a casting, and the communication passage and the muffler chamber may be made of a mold or may be made by machining. The communication passage and the silencing chamber may be designed as a Helmholtz resonance silencer. However, since there is a volume reduction due to the lubricating oil present in the communication passage and the silencing chamber, the target refrigeration system What is necessary is just to confirm by a test etc. and to adjust the shape of the said communication channel | path and the said silencing room so that it may have a silencing effect with the resonance frequency designed on condition.

  The opening of the communication passage to the cylinder chamber may be closer to the refrigerant gas discharge side of the cylinder chamber than the center line of the blade, as viewed from the direction of the central axis of the cylinder chamber. The relative position of the communication passage and the muffler chamber with respect to the blade is arbitrary. Moreover, the shapes of the communication passage and the sound deadening chamber are free.

  Further, a two-cylinder type having two cylinder chambers may be used as the compression element. Further, the compression element may be arranged on the upper side and the motor may be arranged on the lower side. The compressor may be a so-called low-pressure dome type compressor in which the sealed container is filled with the refrigerant before being compressed by the compression element. Further, the compressor may be a horizontal compressor arranged so that the axis 12a of the shaft 12 is in the horizontal direction.

It is a longitudinal section showing a 1st embodiment of a compressor of the present invention. It is a top view of a compression element. It is a longitudinal cross-sectional view of the principal part expansion of a compression element. It is a top view of a roller while showing a 2nd embodiment of a compressor of the present invention. It is a longitudinal cross-sectional view of a roller. It is a top view of a roller while showing a 3rd embodiment of the compressor of the present invention. It is a longitudinal cross-sectional view of a roller. It is a top view of a roller while showing a 4th embodiment of a compressor of the present invention. It is a longitudinal cross-sectional view of a roller. It is a top view of a roller while showing a 5th embodiment of a compressor of the present invention. It is a longitudinal cross-sectional view of a roller. It is a top view of a roller while showing a 6th embodiment of a compressor of the present invention. It is a longitudinal cross-sectional view of a roller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Compression element 3 Motor 12 Shaft 21 Cylinder 22 Cylinder chamber 22a Central axis 23 Suction chamber 24 Discharge chamber 27,127,227,327,427,527 Roller 28,128,228,328,428,528 Blade 28a Center Line 50 (Upper) End plate 60 (Lower) End plate 70, 71, 72, 73, 74, 75 Silence chamber 80, 81, 82, 83, 84, 85 Communication passage 90 Space 100 Roller inner space

Claims (8)

A cylinder (21) having a cylinder chamber (22);
Rollers (27, 127, 227, 327, 427, 527) that move around the central axis (22a) of the cylinder chamber (22) along the inner surface of the cylinder chamber (22);
The cylinder chamber (22) is attached to the rollers (27, 127, 227, 327, 427, 527) together with the rollers (27, 127, 227, 327, 427, 527) and the refrigerant gas suction chamber ( 23) and a blade (28, 128, 228, 328, 428, 528) for partitioning into a refrigerant gas discharge chamber (24),
In the rollers (27, 127, 227, 327, 427, 527),
Silencer (70, 71, 72, 73, 74, 75);
A communication passage (80, 81, 82, 83, 84, 85) that opens into the cylinder chamber (22) and communicates the silencer chamber (70, 71, 72, 73, 74, 75) with the cylinder chamber (22). ). The compressor according to claim 1,
The communication passage (80, 81, 82) opens only on the peripheral surface and end surface of the roller (27, 127, 227),
The compressor is characterized in that the sound deadening chamber (70, 71, 72) is opened only on an end face of the roller (27, 127, 227). The compressor according to claim 1,
The communication path (83, 84) opens only on the peripheral surface of the roller (327, 427),
The compressor is characterized in that the silencing chamber (73, 74) is opened only on the end face of the roller (327, 427). The compressor according to claim 1,
The silencing chamber (75) and the communication passage (85) are integrally formed in one space (90),
The compressor is characterized in that the space (90) is opened only on the peripheral surface of the roller (527). The compressor according to claim 1,
The compressor characterized in that the rollers (27, 127, 227, 327, 427, 527) are made of a sintered material. The compressor according to claim 1,
An opening of the communication passage (80, 81, 82, 83, 84, 85) to the cylinder chamber (22) is seen from the direction of the central axis (22a) of the cylinder chamber (22). , 128, 228, 328, 428, 528) on the refrigerant gas suction side of the cylinder chamber (22) with respect to the center line (28a). The compressor according to claim 1,
The compressor characterized in that the communication passage (81, 82, 83) is opened at the lowermost end portion of the muffler chamber (71, 72, 73). The compressor according to claim 1,
The compressor characterized in that the refrigerant gas in the sealed container (1) is carbon dioxide.

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