JP4663293B2 - Compressor - Google Patents

Description

  The present invention is a hermetic compressor that compresses and discharges a fluid such as a refrigerant gas, and particularly has a compression member that rotates concentrically with a rotating shaft to compress the refrigerant gas or the like in a cylinder. It is about.

  Various types of compressors have been known in the past. Among them, a rotary compressor (rotary compressor) has a drive element and a compression element arranged in a hermetic container, and an electric motor in the drive element. The stator is energized to rotate the shaft of the rotor, the rotation shaft mounted on the rotor rotates the roller eccentrically in the cylinder of the compression element, and the vane that is always in contact with the outer peripheral surface of the roller causes the inside of the cylinder to It is divided into a low-pressure chamber and a high-pressure chamber. The refrigerant gas gas sucked into the low-pressure chamber is compressed and discharged into the sealed container, and the high-pressure refrigerant gas is discharged from the sealed container and supplied to the refrigerant circuit. (For example, Patent Document 1).

  In the conventional rotary compressor described above, an eccentric disc portion eccentric to the rotary shaft is provided in the vicinity of the end of the rotary shaft pivotally attached to the rotor of the drive element, and a roller is freely rotatable on the outer periphery of the eccentric disc portion. It is arranged. When the rotating shaft rotates as described above, the roller slides and rotates along the inner circumferential surface of the circular space (compression space) of the cylinder with the eccentric rotation of the eccentric disk portion, and the refrigerant gas in the cylinder is discharged. It is compressed while moving from the low pressure chamber to the high pressure chamber.

  In the rotary compressor having such a structure, an eccentric disk portion must be formed on the rotation shaft, and a roller must be rotatably provided on the outer periphery of the eccentric disk portion. In addition, the number of parts increases, which is one of the causes of cost increase. Further, since the roller rotates eccentrically via the eccentric disk portion, vibration and torque fluctuation tend to increase.

  In order to prevent deterioration in workability, increase in parts, and increase in vibration and torque fluctuation in the conventional rotary compressor, the combination of the eccentric disk portion and the roller of the rotary shaft is not used, but concentric with the rotary shaft. There is known a compressor in which a compression member is attached to a shaft and the refrigerant gas sucked by compressing the compression member in a compression space of a cylinder can be compressed (for example, Patent Document 2).

The compressor provided with a compression member that rotates concentrically with the rotation shaft uses an inclined plate as the compression member. In order to compress the refrigerant gas on both sides of the inclined plate, the suction refrigerant gas is introduced into the compression space of the cylinder. It is necessary to provide two intake paths each for leading the intake path and for discharging the compressed refrigerant gas. Therefore, since the high pressure chamber and the low pressure chamber are adjacent to each other above and below the compression member, the difference between the high pressure and the low pressure becomes large, resulting in a problem of efficiency deterioration due to refrigerant leakage. In order to prevent this, the present applicant has developed a compressor in which the compression member is formed of a relatively thick member and the refrigerant gas is compressed on one side, and a patent application has been filed earlier (Japanese Patent Application 2004). -003142).
JP-A-6-307363 Japanese Patent Application No. 2004-003142

  The compressor according to the above-mentioned prior application can compress the refrigerant gas by providing a substantially cylindrical compression member on the concentric shaft with respect to the rotation shaft of the drive mechanism and forming an inclined surface on the upper surface of the compression member. In this way, the stator of the drive element is energized to rotate the rotor, and the compression member is rotated concentrically within the cylinder of the compression element by the rotation shaft pivotally attached to the rotor, and the inclined surface of the compression member is The cylinder is divided into a low-pressure chamber and a high-pressure chamber through vanes that are always in contact. The refrigerant gas sucked into the low-pressure chamber is compressed and discharged into the sealed container. Is discharged and supplied to the refrigerant circuit.

  In the compressor according to the prior application, the compression element is fixed to the hermetic container and supports the shaft that passes through the rotation shaft fixed to the rotor of the drive element, and is fixed to the support member to form a compression space. Cylinder and concentric shaft fixed to the rotating shaft, rotate in the compression space of the cylinder, and return to the top dead center through the bottom dead center that becomes the lowest from the top dead center when one surface makes a round around the rotating shaft. A compression member formed on a wave-shaped inclined surface, and a vane slot provided on the support member via a spring, and a tip is always in contact with the inclined surface of the compression member so that the inside of the compression space is a low pressure chamber and a high pressure chamber. And vanes.

  The vane attached to the vane slot of the support member via a spring has a substantially rectangular plate shape, the inner end thereof is in contact with the rotary shaft, and the outer end is an inner portion forming a compression space of the cylinder. The lower end moves up and down along the vane slot while contacting the peripheral wall and contacting the inclined surface of the compression member. Oil is supplied to the contact portion between the inner end portion of the vane and the rotary shaft to be sealed, but a slight gap may be formed there. When a slight gap is generated between the inner end of the vane and the rotating shaft, there is a problem that the refrigerant gas compressed in the compression space of the cylinder leaks and the compression performance is lowered. Further, there is a problem that wear of the sliding portion increases due to contact between the inner end portion of the vane and the rotating shaft.

  The present invention has been made to solve such a problem, and suppresses leakage of refrigerant gas during compression from a slight gap between the inner end portion of the vane in the compression element and the rotating shaft. Another object of the present invention is to provide a compressor in which the wear of the sliding portion between the vane and the rotating shaft is eliminated.

In order to achieve the above object, according to the compressor of claim 1 of the present invention, a driving element and a compression element driven by the driving element are disposed in a hermetic container, and the compression element includes the sealing element. A support member fixed to the container and supported by a rotary shaft fixed to the rotor of the drive element, and a cylinder fixed to the support member to form a compression space; a concentric shaft fixed to the rotation shaft; rotating within the compression space of the cylinder, is formed on the inclined surface of a substantially sinusoidal back to top dead center the upper surface through the bottom dead center becomes the lowest from the top dead center becomes highest when around about said rotation axis And a compression member in which a radial line passing through the center of the upper surface is horizontal, and a vane slot provided in the support member, and is always biased downward by a spring , and a lower end edge is inclined of the compression member. sliding on the surface And so that always abuts a vane for dividing the compression space into a low pressure chamber and a high pressure chamber, a suction fluid into the low-pressure chamber by the compressor to be discharged from the high pressure chamber is compressed by the compression member A non-rotating cylindrical roller is fitted to the lower portion of the rotating shaft so as to be movable up and down along the rotating shaft, and the vane has an outer edge facing the inner peripheral surface of the cylinder. The lower edge of the outer edge is located at the outer peripheral edge of the upper surface of the compression member and faces the upper surface of the compression member, and the inner edge of the vane facing the outer peripheral surface of the roller is The lower end of the roller is integrated with the outer peripheral surface of the roller, and is integrated with the outer peripheral surface of the roller from the lower end up to a predetermined height position. The lower end extends from the lower end of the outer edge to the lower end of the inner edge. The side edges are straight and the outer peripheral surface of the roller By being orthogonally against, across the radial extent of the upper surface extending to the inner periphery from the outer peripheral edge of the upper surface of said compression member is in contact, characterized in that.

A compressor according to a second aspect of the present invention is the compressor according to the first aspect, wherein a reduced diameter portion is provided at a lower portion of the rotating shaft, an attachment portion is provided at a lower end of the reduced diameter portion, and a central portion of the upper surface of the compression member is provided. A recessed portion having the same inner diameter as the shaft hole of the support member is provided, and a receiving portion is provided on the bottom surface of the recessed portion, and the mounting portion is locked to the receiving portion, so that the rotating shaft is attached to the compression member. The roller passes through a gap formed between the reduced diameter portion of the rotating shaft and the recessed portion of the compression member, and a gap generated between the reduced diameter portion of the rotating shaft and the shaft hole of the support member. It moves up and down along the reduced diameter portion of the rotating shaft.

  A compressor according to a third aspect of the present invention is the compressor according to the first or second aspect, wherein the roller has an inner diameter larger than an outer diameter or a reduced diameter portion of the rotating shaft, and is smaller than the rotating shaft or the reduced diameter portion. It moves up and down without contact.

  According to the first aspect of the present invention, a non-rotating cylindrical roller is fitted to the lower portion of the rotating shaft so as to be movable up and down along the rotating shaft, and this roller is integrally fixed to the inner end of the vane. Therefore, a roller is interposed between the inner end of the vane and the rotating shaft, and no gap is generated between the inner end of the vane and the rotating shaft and between the inner end of the vane and the roller. . Thereby, it can suppress that the refrigerant gas compressed in the compression space of a cylinder leaks, and can improve the compression performance of a compressor. Further, wear of the sliding portion between the vane and the rotating shaft can be eliminated.

According to the second aspect of the present invention, the reduced diameter portion is provided at the lower portion of the rotating shaft, and the attachment portion provided at the lower end of the reduced diameter portion is the same as the shaft hole of the support member provided at the center of the upper surface of the compression member. A clearance formed between the reduced diameter portion of the rotating shaft and the recessed portion of the compression member, by which the rotating shaft can be easily attached to the compression member by being locked to the receiving portion of the recessed portion having an inner diameter , In addition, the roller can move up and down along the reduced diameter portion of the rotating shaft through a gap formed between the reduced diameter portion of the rotating shaft and the shaft hole of the support member. As a result, the assembly of the roller to the rotating shaft can be facilitated, and a gap for the roller to move up and down can be easily formed.

  According to the third aspect of the invention, the roller has an inner diameter larger than the outer diameter of the rotary shaft or the reduced diameter portion, and moves up and down in a non-contact manner with respect to the rotary shaft or the reduced diameter portion, thereby preventing wear. Resistance to vertical movement of the roller can be suppressed. Thereby, the smooth and reliable movement of the vane can be ensured, and the compression performance of the compressor can be further improved.

  Next, an embodiment of a compressor according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an embodiment of a compressor according to the present invention, and is a schematic longitudinal sectional view in a state where a vane is pushed up. FIG. 2 shows an embodiment of the compressor according to the present invention, and is a schematic longitudinal sectional view in a state where the vane is pushed down. FIG. 3 is a schematic cross-sectional view of the compressor according to the embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an iron sealed container, which includes a cylindrical body portion 1a, a cap portion 1b welded to the upper end of the body portion 1a, and a bottom portion 1c welded to the lower end of the body portion 1a. It is configured. A driving element 2 is arranged in the upper part of the sealed container 1, and a compression element 3 driven by the driving element 2 is arranged in the lower part.

  The drive element 2 includes an electric motor that includes a stator 4 fixed to the inner wall of the body 1 a of the hermetic container 1 and a rotor 6 disposed inside the stator 4. The upper end of the rotating shaft 5 is attached to the part. A plurality of terminals 2a are mounted on the cap portion 1b of the hermetic container 1 via mounting members 2b. These terminals 2a and the stator 4 are connected by internal lead wires (not shown), and the terminals 2a are externally connected. An external lead wire (not shown) from the power source is connected to energize the stator 4. In addition, between the outer peripheral part of the stator 4 of the driving element 2 and the body part 1a of the sealed container 1, a plurality of gaps 10 that communicate the upper and lower space parts are formed.

  The compression element 3 includes a support member 7 fixed to the inner wall of the body portion 1 a of the sealed container 1, a cylinder 8 attached by bolts (not shown) under the support member 7, and the cylinder 8. Compressed member 9 (referred to as a swash member in the present embodiment), a substantially rectangular plate-like vane 11 mounted on the support member 7 so as to be movable up and down, and a notch 8b of the cylinder 8 (FIG. 3). It is comprised from the discharge valve 12 etc. which were attached to the side surface.

  The support member 7 is composed of an upper member R and a lower member S. A protrusion 13 serving as a main bearing portion is formed in a concentric columnar shape at the center of the upper surface of the upper member R, and a concentric columnar shape is formed in the center of the lower surface. A recessed portion 15 is formed by being recessed in the direction, and the upper end portion of the lower member S is fitted and fixed to the recessed portion 15. The upper member R is provided with an upper shaft hole 7a penetrating from the upper surface of the protruding portion 13 to the bottom surface of the recessed portion 15, and the lower member S is provided with a lower shaft hole 7b penetrating from the upper surface to the lower surface. The shaft hole 7b is coaxial with the upper shaft hole 7a and has the same inner diameter and communicates therewith.

  As shown in FIG. 2, the upper member R and the lower member S are provided with a vane slot 16 and a spring mounting hole 17 communicating in the vertical direction, and the vane 11 moves up and down via a coil spring 18. It is installed as possible. The coil spring 18 is inserted into the spring mounting hole 17, the lower end is fixed to the upper end portion of the vane 11, and the upper end is fixed to the spring receiving portion 14 above the spring mounting hole 17 to constantly bias the vane 11 downward. is doing. The inner end of the vane slot 16 opens into the upper shaft hole 7a and the lower shaft hole 7b. A cylindrical roller 19 (see FIG. 4) is integrally fixed to the inner end of the vane 11.

  Further, the upper member R of the support member 7 is provided with a pipe connection port 7c as shown in FIG. 1, and the end of the suction pipe 20 attached to the trunk portion 1a of the sealed container 1 is connected to the pipe connection port 7c. Connection is fixed. The pipe connection port 7c communicates with a passage 7d formed inside the upper member R, and this passage 7d communicates with a suction port 7e provided through the lower member S.

  The rotary shaft 5 is rotatably inserted into the upper shaft hole 7a and the lower shaft hole 7b of the support member 7, and has a reduced diameter portion 5a formed at a lower diameter than the outer diameter of the upper portion at the lower portion. The roller 19 is fitted in the portion 5a. The inner diameter of the roller 19 is approximately equal to the outer diameter of the reduced diameter portion 5a, and the outer diameter of the roller 19 is set to be approximately equal to the inner diameter of the upper shaft hole 7a and the lower shaft hole 7b. Accordingly, when the vane 11 moves up and down, the roller 19 moves up and down along the reduced diameter portion 5 a of the rotating shaft 5 together with the vane 11. Also, as shown in FIG. 4, a mounting portion 5b is provided at the lower end of the reduced diameter portion 5a of the rotating shaft 5, and the mounting portion 5b is engaged with a receiving portion 9e provided on the swash member 9 to rotate. The lower end portion of the shaft 5 can be attached to the swash member 9.

  As shown in FIG. 1, the cylinder 8 is provided with a space penetrating vertically in the central portion, and the upper end portion of the space is closed by fitting the lower member S of the support member 7 and the lower end of the space. The portion is closed by a cover plate member 21 fixed to the lower surface of the cylinder 8 to form a compression space 22. A suction port 7e of the lower member S is opened in the compression space 22, and the refrigerant gas supplied from the suction pipe 20 is sucked into the compression space 22 from the suction port 7e through the passage 7d of the support member 7. It is.

  As shown in FIG. 3, the lower end edge of the lower member S of the support member 7 is provided with a discharge port 7 f that passes from the lower surface side to the outer peripheral surface side, and the lower surface side of the discharge port 7 f is in the compression space 22. Opened, the outer peripheral surface side communicates with a passage 8 a provided in the cylinder 8, and the passage 8 a opens in a notch 8 b of the cylinder 8. The discharge valve 12 is attached to the side surface of the notch 8 b of the cylinder 8, and the passage 8 a is opened and closed by the discharge valve 12. As a result, the high-pressure refrigerant gas compressed in the compression space 22 passes through the passage 8a of the cylinder 8 from the discharge port 7f of the lower member S in the support member 7, opens the discharge valve 12, and is discharged toward the notch 8b. .

  Although not shown, the upper member R of the support member 7 is provided with a cutout portion corresponding to the cutout portion 8b of the cylinder 8, and a through hole is provided through the cutout portion into the sealed container 1. Yes. As a result, the high-pressure refrigerant gas discharged to the notch 8b of the cylinder 8 is discharged into the sealed container 1 through the notch and the through hole of the upper member R.

  The swash member 9 is rotatably arranged in the compression space 22 of the cylinder 8 and has a substantially cylindrical shape as a whole as shown in FIG. 5, and is opposed to the thick portion 9a on one side. The upper surface 9c along the circumferential direction is formed as a continuous inclined surface that is high at the thick portion 9a and low at the thin portion 9b. The swash member 9 is provided with a recessed portion 9d having the same inner diameter as the upper shaft hole 7a and the lower shaft hole 7b of the support member 7 at the center of the upper surface 9c, and the rotating shaft 5 is formed on the bottom surface of the recessed portion 9d. A receiving portion 9e for locking the mounting portion 5b is provided. As a result, the roller 19 can enter the gap formed between the reduced diameter portion 5 a of the rotating shaft 5 and the recessed portion 9 d of the swash member 9, and as a result, the roller 19 has the entire length of the reduced diameter portion 5 a of the rotating shaft 5. Can move up and down.

  As shown in FIGS. 1 and 2, the swash member 9 has a cylindrical protrusion 9f provided at the center of the lower surface thereof rotatably fitted in a shaft hole 21a provided in the cover plate member 21, Thereby, the auxiliary bearing part of the rotating shaft 5 is comprised. Further, an oil pump 23 is attached to the lower end portion of the protruding portion 9f of the swash member 9.

  6A to 6C are side views in which the rotation angle of the swash member 9 is changed. The upper surface 9c of the swash member 9 has a substantially sinusoidal shape that returns from the highest dead center P to the highest dead center Q through the lowest dead center Q when it goes around the rotation axis 5 in the circumferential direction. Yes. Further, the longitudinal section of the upper surface 9c passing through the rotary shaft 5 is all horizontal (see FIGS. 1 and 2) at any angle of 360 degrees, and the upper surface 9c and the lower member S of the support member 7 A space between the lower surface is the compression space 22.

  The top dead center P of the swash member 9 is movably opposed to the lower surface of the lower member S of the support member 7 via a slight clearance. This clearance is sealed by the oil sealed in the sealed container 1. As shown in FIG. 6, the vane 11 has a lower end formed in an R-shaped cross section and is always in contact with the upper surface 9c of the swash member 9, thereby dividing the compression space 22 in the cylinder 8 into a low pressure chamber and a high pressure chamber. The coil spring 18 biases the vane 11 downward to hold the lower end ridge line portion of the vane 11 so as not to be separated from the upper surface 9 c of the swash member 9, and the vane 11 extends along the vane slot 16 of the support member 7. To control the smooth up and down movement.

  Further, a minute clearance is formed between the outer peripheral surface of the swash member 9 and the inner wall surface of the cylinder 8 constituting the sealed space 22, so that the swash member 9 is rotatable. The clearance between the outer peripheral surface of the swash member 9 and the inner wall surface of the cylinder 8 is also sealed with oil. This is for suppressing the leakage of the refrigerant gas. A concave groove 9g for fitting the seal member is provided along the circumferential direction on the outer peripheral surface of the swash member 9, and the lower surface side of the swash member 9 corresponds to the thick portion 9b. An appropriately sized recess 9h (FIGS. 1 and 2) is provided. The concave portion 9h reduces the weight of the thick portion 9b, thereby suppressing fluctuations in the rotational torque of the swash member 9.

  As shown in FIGS. 1 and 2, a discharge pipe 24 is attached to the upper end of the cap portion 1 b in the sealed container 1. As described above, the high-pressure refrigerant gas discharged into the sealed container 1 from the through hole of the support member 7 passes through a slight gap between the stator 4 and the rotor 6 in the drive element 2 and is an upper part in the sealed container 1. It flows into the region and is discharged from the discharge pipe 24 to the outside. The high-pressure refrigerant gas discharged from the discharge pipe 24 is supplied to a refrigerant circuit (not shown), and the refrigerant gas circulated through the refrigerant circuit and having a low pressure is returned from the suction pipe 20 to the compressor.

  The inner bottom of the sealed container 1 is an oil reservoir 25, and the oil in the oil reservoir 25 is pumped up by the oil pump 23. The pumped-up oil rises along the axial through hole formed in the rotating shaft 5 due to the centrifugal force generated by the concentric shaft rotation of the swash member 9 and the rotating shaft 5, and is provided at the main part of the rotating shaft 5. Is supplied to the clearance of the compression element 3 through the oil hole (not shown). Further, a predetermined amount of carbon dioxide, R134a, or HC-based refrigerant gas is sealed in the sealed container 1, for example.

  The operation of the compressor according to the present invention configured as described above will be described. In this compressor, when the coil of the stator 4 of the drive element 2 is energized, the rotor 6 rotates. The rotation of the rotor 6 is transmitted to the swash member 9 through the rotating shaft 5, and the swash member 9 rotates in the compression space 22 of the cylinder 8. Here, the top dead center P of the upper surface 9c of the swash member 9 is on the discharge side with the vane 11 as a boundary, and the space surrounded by the cylinder 8, the support member 7, the swash member 9, and the vane 11 on the suction side (low pressure chamber) It is assumed that the refrigerant gas is sucked in through the suction pipe 20, the passage 7d of the support member 7 and the suction port 7e.

  When the swash member 9 rotates from this state, the volume of the low pressure chamber is reduced by the inclination of the upper surface 9c of the swash member 9 from the stage where the top dead center P passes the vane 11 and the suction port 7e, and the high pressure chamber is reduced. The refrigerant gas is compressed. The compressed high-pressure refrigerant gas is discharged from the discharge port 7f until the top dead center P passes through the discharge port 7f of the support member 7. After the top dead center P passes through the suction port 7e of the support member 7, the volume of the low-pressure chamber increases on the suction side, so that the refrigerant gas is sucked into the low-pressure chamber. Such an operation is repeatedly performed to compress the refrigerant gas.

  In the refrigerant gas compression operation, the vane 11 is reciprocated in the vertical direction while being in close contact with the upper surface 9 c of the swash member 9. FIG. 1 shows a state in which the vane 11 is pushed up to the maximum by the top dead center P of the swash member 9. At this time, the vane 11 enters the vane slot 16 of the support member 7, and the ridge line portion at the lower end is The upper end of the roller 19, which is positioned substantially within the lower surface of the lower member S and lifted together with the vane 11, is positioned substantially at the uppermost position of the reduced diameter portion 5 a of the rotating shaft 5. FIG. 2 shows a state in which the vane 11 is pushed down to the maximum by the coil spring 18 with respect to the bottom dead center Q of the swash member 9. At this time, the vane 11 protrudes from the vane slot 16 of the support member 7 and protrudes from the lower edge ridge line. The lower end portion of the roller 19 that is in close contact with the bottom dead center Q and descends together with the vane 11 is located substantially at the bottom surface of the recessed portion 9 d of the swash member 9.

  Since the oil pumped up from the oil reservoir 25 is supplied to the upper shaft hole 7a and the lower shaft hole 7b of the support member 7 from the oil hole (not shown) of the rotating shaft 5, the rotating shaft 5 and the upper shaft hole 7a. The minute clearance between the outer diameter of the roller 19 and the minute clearance between the reduced diameter portion 5a and the inner wall surface of the roller 19 and the minute clearance between the outer wall surface of the roller 19 and the lower shaft hole 7b are sealed with oil. Further, since the roller 19 is integrally fixed to the inner end portion of the vane 11, there is no gap between the roller 19 and the vane 11. Thereby, the leakage of the refrigerant gas compressed in the compression space 22 of the cylinder 8 can be suppressed, and the compression performance of the compressor can be improved. In addition, it is possible to eliminate the wear of the sliding portion between the vane 11 and the rotary shaft 5 that has occurred in the past.

  In the relationship between the roller 19 and the reduced diameter portion 5a, if the inner diameter of the roller 19 is formed larger than the outer diameter of the reduced diameter portion 5a, or the outer diameter of the reduced diameter portion 5a is smaller than the inner diameter of the roller 19, The roller 19 is not in contact with the reduced diameter portion 5a. Accordingly, the roller 19 that moves up and down together with the vane 11 is non-rotating and non-contacting with respect to the reduced diameter portion 5a, so that it is possible to prevent wear and to suppress resistance to the vertical movement of the roller 19. As a result, the smooth and reliable movement of the vane 11 can be ensured, and the compression performance of the compressor can be further improved.

  The high-pressure refrigerant gas compressed in the compression space 22 of the cylinder 8 passes through the passage 8a of the cylinder 8 from the discharge port 7f of the lower member S in the support member 7 as described above, opens the discharge valve 12 and opens the cylinder 8 It is discharged to the side of the notch 8b, and then discharged into the sealed container 1 through the notch and the through hole of the support member 7. The high-pressure refrigerant gas discharged into the hermetic container 1 passes through a slight gap between the stator 4 and the rotor 6 of the drive element 2, moves to the upper region in the hermetic container 1, and is separated from the oil. It is discharged from and supplied to the refrigerant circuit. On the other hand, the oil separated from the high-pressure refrigerant gas flows down from the gap 10 formed between the sealed container 1 and the stator 4 and returns to the oil reservoir 25 in the inner bottom portion of the sealed container 1.

  In the above embodiment, the reduced diameter portion 5a is formed in the lower portion of the rotating shaft 5 and the roller 19 moves up and down along the reduced diameter portion 5a. However, the present invention is limited to this. It is also possible to implement with a rotating shaft that does not form a reduced diameter portion. In that case, since the outer diameter of the roller becomes larger, the inner diameter of the shaft hole provided in the support member is partially enlarged according to the outer diameter, and the inner diameter of the recessed portion provided in the swash member is also changed. Thus, the roller may be configured to move up and down along the lower end of the rotating shaft. Moreover, in the said embodiment, although the supporting member 7 was comprised from the upper member R and the lower member S, it is also possible to implement using an integral supporting member, without dividing | segmenting into the upper member R and the lower member S. is there.

  The compressor according to the present invention can exhibit a sufficient compression function while being small in size and simple in structure. As described above, the swash member 9 is provided with the concave groove 9g on the outer peripheral surface, and it is possible to sufficiently secure a seal with the inner wall surface of the compression space 20 by fitting the seal member into the concave groove 9g. it can. Thereby, further suppression of refrigerant gas leakage can be expected, and operation with high compression efficiency is possible. Further, since the thick portion 9a of the swash member 9 serves as a flywheel, torque fluctuation is also reduced.

  In the above embodiment, since the cover plate member 21 has the shaft hole 21a that becomes the sub-bearing portion of the rotating shaft 5, it is not necessary to separately provide a supporting member for the sub-bearing of the rotating shaft 5, and the number of parts can be reduced. Further downsizing becomes possible.

  In the above embodiment, the compressor used for the refrigerant circuit of the refrigerator to compress the refrigerant gas has been described. However, the present invention is not limited to this, and the present invention is also effective for an air compressor that sucks and compresses air, for example. Can be applied to.

  Especially this invention can be optimally utilized as a compressor for compressing refrigerant gas and supplying it to refrigerant circuits, such as a refrigerator.

1 is a schematic longitudinal sectional view showing a compressor according to an embodiment of the present invention in a state where a vane is pushed up. 1 is a schematic longitudinal sectional view showing a compressor according to an embodiment of the present invention in a state where a vane is pushed down. 1 is a schematic cross-sectional view showing an embodiment of a compressor according to the present invention. It is an exploded fracture perspective view of an important section in an embodiment of a compressor concerning the present invention. It is a perspective view of a swash member in an embodiment of a compressor concerning the present invention. It is the side view which changed the rotation angle of the swash member in embodiment of the compressor which concerns on this invention, (a) is the side view seen from the thin part side, (b) is the intermediate position of a thin part and a thick part The side view seen from (c) is the side view seen from the thick part side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Drive element 3 Compression element 4 Stator 5 Rotating shaft 5a Reduced diameter part 5b Mounting part 6 Rotor 7 Support member 7a Upper shaft hole 7b Lower shaft hole 8 Cylinder 9 Swash member (compression member)
9d recessed portion 9e receiving portion 10 gap 11 vane 12 discharge valve 13 projecting portion 14 spring receiving portion 15 recessed portion 16 vane slot 17 spring mounting hole 18 coil spring 19 roller 20 suction pipe 21 cover plate member 22 compression space 23 oil pump 24 discharge piping 25 Oil sump

Claims (3)

A drive element and a compression element driven by the drive element are arranged in the sealed container,
The compression element includes a support member for rotatably supporting by penetrating the rotary shaft fixed to the rotor of the drive element is fixed to the closed container, and a cylinder for forming a compression space and is fixed to the support member, the rotary shaft A substantially sinusoidal wave shape that rotates in the compression space of the cylinder and is concentrically fixed to the upper surface, and returns to the top dead center through the bottom dead center that becomes the lowest from the top dead center when the upper surface makes a round around the rotational axis. A compression member having a horizontal radial line passing through the center of the upper surface, and a vane slot provided in the support member. The lower end is always urged downward by a spring . A vane that constantly abuts so that an edge slides on the inclined surface of the compression member and divides the compression space into a low pressure chamber and a high pressure chamber;
A compressor that compresses the fluid sucked into the low-pressure chamber by the compression member and discharges the fluid from the high-pressure chamber;
A non-rotating cylindrical roller is fitted to the lower portion of the rotating shaft so as to be movable up and down along the rotating shaft,
The vane is
The outer edge facing the inner circumferential surface of the cylinder faces so as to slide on the inner circumferential surface of the cylinder,
The lower end of the outer edge faces the outer peripheral edge of the upper surface of the compression member so as to slide with the upper surface,
The inner edge of the vane facing the outer peripheral surface of the roller has a lower end integrated with the outer peripheral surface of the roller, and is integrated with the outer peripheral surface of the roller from the lower end to a predetermined height position,
The lower edge from the lower end of the outer edge to the lower end of the inner edge is straight and perpendicular to the outer peripheral surface of the roller, so that the outer peripheral edge of the upper surface of the compression member is changed to the inner peripheral edge. Abutting over the radius range of the top surface,
A compressor characterized by that. A reduced diameter portion is provided at the lower portion of the rotating shaft, and an attachment portion is provided at the lower end of the reduced diameter portion,
In addition to providing a concave portion having the same inner diameter as the shaft hole of the support member at the center of the upper surface of the compression member, a receiving portion is provided on the bottom surface of the concave portion,
The rotating shaft is pivotally attached to the compression member by locking the mounting portion to the receiving portion,
The roller rotates through a gap formed between the reduced diameter portion of the rotating shaft and the recessed portion of the compression member, and a gap generated between the reduced diameter portion of the rotating shaft and the shaft hole of the support member. The compressor according to claim 1, wherein the compressor moves up and down along a reduced diameter portion of the shaft. 3. The roller according to claim 1, wherein an inner diameter of the roller is larger than an outer diameter of the rotating shaft or the reduced diameter portion, and moves up and down in a non-contact manner with respect to the rotating shaft or the reduced diameter portion. Compressor.

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