JP2006104948A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor for easily performing precision finishing processing, by easily processing a vane slot and a spring installing hole in a support member of a compression element in the compressor. <P>SOLUTION: The vane slot 16 and the spring installing hole 17 for installing a vane 11, are penetratingly arranged in the support member 7 integrally formed with a main bearing part 13. A cover member 15 for blocking up an opening of the vane slot 16 and the spring installing hole 17 generated on an upper surface of the support member 7 and a slit-like cutout part (unillustrated) generated in a part of the main bearing part 13, is installed in and fixed to the support member 7, to restrain leakage of refrigerant gas. A spring receiving part is arranged on the under surface side of the cover member 15, and an upper end part of a coil spring 18 is fixed, and this coil spring 18 is installed in the spring installing hole 17. The substantially rectangular plate-like vane 11 is fixed to a lower end part of the coil spring 18, and the vane 11 is vertically movably installed in the vane slot 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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 are known as compressors. Among them, a rotary compressor (rotary compressor) has a drive element and a compression element arranged in a sealed container, and the stator of the drive element is energized. Then, the rotor is axially rotated, the roller is eccentrically rotated in the cylinder of the compression element by the rotation shaft attached to the rotor, and the inside of the cylinder is separated from the low pressure chamber by the vane that is always in contact with the outer peripheral surface of the roller. It is divided into a high-pressure chamber, and the refrigerant 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. There is (for example, Patent Document 1).

  In the conventional rotary compressor, an eccentric disk portion is provided in the vicinity of the end of the rotating shaft that is pivotally attached to the rotor of the drive element, and a roller is rotatably disposed on the outer periphery of the eccentric disk portion. When the rotating shaft rotates as described above, the roller rotates eccentrically in the compression space of the cylinder along with the eccentric rotation of the eccentric disk portion, and compresses while moving the refrigerant gas in the cylinder from the low pressure chamber to the high pressure chamber. To do.

  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).

In the compressor provided with a compression member that rotates concentrically with the rotation shaft, an inclined plate is used as the compression member, and the refrigerant gas is guided to the compression space of the cylinder in order to compress the refrigerant gas on both sides of the inclined plate. Two suction paths and two discharge paths for discharging the compressed refrigerant gas must be provided. With such a structure, since the high pressure chamber and the low pressure chamber are adjacent to each other above and below the inclined plate in the entire area of the cylinder, the difference between the high pressure and the low pressure becomes large, and the efficiency deterioration due to refrigerant gas leakage becomes a problem. 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 No. 2004). -003142).
JP-A-6-307363 Japanese Patent Application No. 2004-003142

  In the compressor according to the above prior application, a substantially cylindrical compression member is provided on the concentric shaft with respect to the rotating shaft, and a specially shaped inclined surface is formed on the upper surface of the compression member so that the refrigerant gas can be compressed. Thus, the rotor of the drive element is energized to rotate the rotor, the rotation shaft mounted on the rotor rotates the compression member concentrically within the cylinder of the compression element, and is constantly applied to the inclined surface of the compression member. The inside of the cylinder is divided into a low pressure chamber and a high pressure chamber through vanes that are in contact with each other. The refrigerant 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. To be supplied to the refrigerant circuit.

  Schematically explaining the configuration of the compressor according to this prior application, the compression element is fixed to a hermetic container and is supported by a support member that is pivotally supported by a rotary shaft fixed to a rotor of a drive element, and is fixed to the support member. The cylinder that forms the compression space and the shaft that is fixed concentrically to the rotation shaft and rotates in the compression space of the cylinder and goes up from the highest dead center to the lowest dead center when one surface makes a round around the rotation axis. A compression member formed on a substantially sinusoidal inclined surface that returns to the dead center, and a vane slot provided in the support member is mounted via a coil spring, and the tip always contacts the inclined surface of the compression member so that the inside of the compression space Is provided with a vane for classifying the chamber into a low pressure chamber and a high pressure chamber.

  However, the support member must be provided with a vane slot for mounting the vane and a spring mounting hole for mounting the spring in a region from the lower surface of the support member to a position slightly below the upper surface of the support member. There was a problem that it was troublesome and it was difficult to finish them precisely.

  The present invention has been made to solve the above-described problem. A compressor capable of easily processing a vane slot and a spring mounting hole in a support member and easily performing precision finishing is provided. The purpose is to provide.

  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 arranged in a sealed container, and the compression element is the sealed container. A support member that is fixed to the rotor of the drive element and is supported by the rotation shaft. The cylinder is fixed to the support member to form a compression space, and the cylinder is coaxially fixed to the rotation shaft. A compression member formed on a substantially sinusoidal inclined surface that rotates in the compression space and returns to the top dead center through the bottom dead center that becomes the lowest when one surface makes a round around the rotation axis. And a vane that is attached to a vane slot provided in the support member via a spring and whose tip always contacts the inclined surface of the compression member to divide the compression space into a low pressure chamber and a high pressure chamber, Inhalation into the low pressure chamber A compressor that compresses the fluid by the compression member and discharges it from the high-pressure chamber, wherein the support member is integrally formed with a main bearing portion that supports the rotating shaft, and the vane slot penetrates the support member. It is characterized by being provided.

  According to a second aspect of the compressor of the present invention, in the compressor according to the first aspect, the vane slot is provided through the support member in the vertical direction, and the lid member that closes the upper end opening is used as the support member. It is characterized by being fixed.

  According to a third aspect of the compressor of the present invention, in the compressor of the second aspect, a spring receiving portion is provided on the lower surface side of the lid member, and an upper end of the spring is attached to the spring receiving portion. The vane is attached to the lower end.

  According to the first aspect of the present invention, since the vane slot is provided so as to penetrate the support member, the processing of the vane slot is facilitated compared to the case where the vane slot is provided without being penetrated, and the vane slot is easily and precisely set. It can be finished.

  According to the second aspect of the present invention, the vane slot is provided so as to penetrate the support member in the vertical direction, and the lid member that closes the upper end of the support member is attached and fixed to the support member, so that the refrigerant gas leaks from the vane slot. The vane back pressure space can be formed. Thereby, it becomes possible to improve the compression efficiency of refrigerant gas.

  According to the third aspect of the invention, the spring receiving portion is provided on the lower surface side of the lid member, the upper end of the spring is attached to the spring receiving portion, and the vane is attached to the lower end of the spring. Mounting can be performed easily. Further, it is not necessary to provide a mechanism for attaching the upper end of the spring to the support member, and further processing can be facilitated.

  Next, an embodiment of a compressor according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic longitudinal sectional view showing an embodiment of a compressor according to the present invention. FIG. 2 is a schematic longitudinal sectional view passing through a vane in the compressor according to the embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of the compressor according to the embodiment of the present invention. In each figure, reference numeral 1 denotes a sealed container, which is constructed by welding a cap-shaped iron covering member to the upper end of a bottomed cylindrical iron container. However, the compression elements 3 driven by the drive elements 2 are respectively arranged in the lower part.

  The drive element 2 includes an electric motor including a stator 4 fixed to the inner wall of the hermetic container 1 and a rotor 6 disposed inside the stator 4. The upper end portion of the shaft 5 is attached to the shaft. Between the outer peripheral part of the stator 4 of the driving element 2 and the sealed container 1, a plurality of gaps 10 communicating the upper and lower spaces are formed at a plurality of locations. Although not shown, a terminal is attached to the iron covering member of the sealed container 1 via an attachment member, and the terminal and the stator 4 are connected by an internal lead wire. Then, an external lead wire from an external power source is connected to the terminal so that the stator 4 is energized.

  The compression element 3 includes a support member 7 fixed to the inner wall of the sealed container 1, a cylinder 8 attached by bolts (not shown) below the support member 7, and a compression member disposed in the cylinder 8. 9 (referred to as a swash member in the present embodiment), a vane 11 attached to the support member 7 so as to be movable up and down, and a discharge valve 12 attached to the side surface of the notch 8b (FIG. 3) of the cylinder 8. Etc. Further, the center portion of the upper surface of the support member 7 protrudes upward in a concentric column shape and the main bearing portion 13 of the rotating shaft 6 is integrally formed, and the center portion of the lower surface protrudes downward in a concentric column shape and the protrusion portion 14 is integrally formed. The lower surface 14a is a smooth surface.

  The support member 7 is provided with a vane slot 16 and a spring mounting hole 17 located at the center of the vane slot 16. In the present embodiment, the vane slot 16 and the spring mounting hole 17 are formed so as to penetrate from the lower surface 14 a of the projecting portion 14 of the support member 7 to the upper surface 13 a of the main bearing portion 13 of the support member 7. At this time, a part of the main bearing portion 13 has a slit-shaped notch portion 13b formed by the end portion of the vane slot 16 as shown in FIG. The spring mounting hole 17 does not cut out the main bearing portion 13, and the upper end of the spring mounting hole 17 opens on the upper surface of the support member 7. As described above, the vane slot 16 and the spring mounting hole 17 are easily processed by providing the support member 7 so as to penetrate therethrough, and it is also easy to finish precisely.

  5 (a) and 5 (b) show a lid member 15 that closes the upper end opening of the vane slot 16 and the spring mounting hole 17 provided in the support member 7. The lid member 15 includes a horizontal plate piece 15a, The horizontal plate piece 15a is composed of a vertical plate piece 15b erected at the center of one side end portion. The horizontal plate piece 15 a is formed in a curved surface in which the end surface 15 c on the vertical plate piece 15 b side contacts the outer peripheral surface of the main bearing portion 13, and the inner end surface 15 d of the vertical plate piece 15 b is in contact with the outer peripheral surface of the main bearing portion 13. The outer end surface 15 e is formed in a curved surface having the same curvature radius as the inner peripheral surface of the main bearing portion 13. The width of the vertical plate piece 15b (distance between the opposite side surfaces) is substantially equal to the width of the slit-shaped notch 13b in the main bearing portion 13, and the thickness of the vertical plate piece 15b (distance between the opposite curved surfaces) is the main bearing. The height of the vertical plate piece 15 b is substantially equal to the height of the main bearing portion 13.

  When the vertical plate piece 15b is inserted into the slit-shaped notch 13b of the main bearing portion 13 as shown by phantom lines in FIG. 4, the lid member 15 is fitted in close contact, and the end surface 15c of the horizontal plate piece 15a is the main shaft. The upper end opening portion of the vane slot 16 and the spring mounting hole 17 is completely covered with the horizontal plate piece 15a and the vertical plate piece 15b while being in close contact with the outer peripheral surface of the receiving portion 13 (see FIG. 2). In this state, the lid member 15 is fixed to the support member 7. As a fixing means for the support member 7, a stopper such as welding or a bolt can be employed. Thereby, leakage of the refrigerant gas can be suppressed.

  As shown in FIG. 5B, a spring receiving portion 15f is provided on the lower surface side of the lid member 15. The upper end portion of the coil spring 18 is attached to the spring receiving portion 15f, and the lower end portion of the coil spring 18 is Fix to the upper end of the vane 11. Thus, the vane 11 is mounted along the vane slot 16 via the coil spring 18 so as to be movable up and down.

  The compression element 3 will be described in detail. As shown in FIG. 1, the central portion of the cylinder 8 is recessed downward, and a compression space 20 is formed in the recessed portion 19. Further, a sub-bearing portion 21 is formed in an open state at the center of the lower surface of the recessed portion 19 of the cylinder 8. In addition, as shown in FIG. 7, the space which penetrates from the upper surface to the lower surface is provided in the central portion of the cylinder 8, the cover plate member 25 is attached to the lower surface of the cylinder 8 to constitute the compression space 20, and the cover plate member. A shaft hole 25a serving as a sub-bearing portion may be provided at the center of the shaft 25 so that the lower end portion of the rotating shaft 5 is rotatably supported.

  In addition, a pipe connection port 7a and a passage 7b and a suction port 7c communicating with the pipe connection port 7a are provided inside the support member 7, and the end of the suction port 7c opens into the compression space 20. . Furthermore, the end of the suction pipe 22 attached to the sealed container 1 is connected and fixed to the pipe connection port 7 a of the support member 7. Thereby, the refrigerant gas supplied from the suction pipe 22 is sucked into the compression space 20 from the suction port 7 c through the passage 7 b of the support member 7.

  As shown in FIG. 3, the lower end edge of the protrusion 14 in the support member 7 is provided with a discharge port 7d that passes from the lower surface 14a side of the protrusion 14 to the outer peripheral surface side. It opens into the compression space 20, and the outer peripheral surface side of the discharge port 7 d communicates with a passage 8 a provided inside the cylinder 8. The passage 8a of the cylinder 8 opens into the notch 8b 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. Thereby, the high-pressure refrigerant gas compressed in the compression space 20 is discharged from the discharge port 7 c of the support member 7 through the passage 8 a of the cylinder 8 to the notch 8 b side of the cylinder 8 through the discharge valve 12.

  The vane 11 is formed in a substantially rectangular plate shape, and is positioned between the suction port 7c and the discharge port 7d opened in the compression space 20, as shown in FIG. The space 20 is divided into a low pressure chamber and a high pressure chamber.

  As shown in FIG. 1, a swash member 9 is integrally provided at the lower portion of the rotary shaft 5 and is disposed in the compression space 20 of the cylinder 8. The swash member 9 has a substantially cylindrical shape concentric with the rotating shaft 5 as an overall shape, and FIGS. 6A and 6B show side views of the rotating shaft 5 including the swash member 9, respectively. . The swash member 9 has a thick part 9a on one side and a thin part 9b on the other side opposite thereto, and the upper surface 9c along the circumferential direction is high at the thick part 9a and low at the thin part 9b. It is formed on a continuous inclined surface. That is, the upper surface 9c of the swash member 9 has a substantially sine wave 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. Presents. The cross-sectional shape of the upper surface 9c passing through the rotating shaft 5 is parallel to the lower surface 14a of the protruding portion 14 of the support member 7 at any angle of 360 degrees with respect to the rotating shaft 5, and the upper surface 9c The space between the lower surface 14 a of the protruding portion 14 is the compression space 20.

  The top dead center P of the swash member 9 is movably opposed to the lower surface 14a of the protrusion 14 of the support member 7 through a slight clearance. This clearance is sealed by the oil enclosed in the sealed container 1. Further, the lower end of the vane 11 has an R-shaped cross section, and is always in contact with the upper surface 9c of the swash member 9. The coil spring 18 always presses the vane 11 downward to hold the lower end of the vane 11 so as not to be separated from the upper surface 9c of the swash member 9, and the vane 11 smoothly moves along the vane slot 16 of the support member 7. Acts to control vertical movement.

  Further, a minute clearance is formed between the outer peripheral surface of the swash member 9 and the inner wall surface of the recessed portion 19 in the cylinder 8, 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 recessed portion 19 is also sealed with oil. Thereby, leakage of the refrigerant gas can be suppressed.

  As shown in FIGS. 1 and 2, a discharge pipe 23 is attached to the upper end of the sealed container 1. The high-pressure refrigerant gas compressed in the compression space 20 of the cylinder 8 as described above is discharged into the space R (see FIG. 3) surrounded by the notch 8b of the cylinder 8 and the sealed container 1 via the discharge valve 12. Is done. The high-pressure refrigerant gas discharged into the space R is sealed through a notch (not shown) of the support member 7 located on the notch 8b of the cylinder 8 and a through hole (not shown) communicating with the notch. It is discharged into the container 1. The high-pressure refrigerant gas discharged into the hermetic container 1 flows into the upper region in the hermetic container 1 through a slight gap between the stator 4 and the rotor 6 of the driving element 2, and is discharged from the discharge pipe 23 to the outside. Discharged. The high-pressure refrigerant gas discharged from the discharge pipe 23 is supplied to a refrigerant circuit (not shown), and the refrigerant gas circulated through this refrigerant circuit and having a low pressure is returned from the suction pipe 22 to the compressor.

  An oil reservoir 24 is formed on the inner bottom of the sealed container 1, and the oil in the oil reservoir 24 is supplied to a required portion of the compression element 3 via the rotary shaft 5. Furthermore, a predetermined amount of, for example, carbon dioxide, R134a, or HC refrigerant gas is sealed in the sealed container 1.

  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 via the rotating shaft 5, whereby the swash member 9 rotates concentrically with the rotating shaft 5 in the cylinder 8. When 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, the cylinder 8, the support member 7, the swash member 9 and the vane 11 on the suction port 7c side with the vane 11 as a boundary. The refrigerant gas is sucked into the space (low pressure chamber) surrounded by the suction pipe 22, the passage 7b of the support member 7, and the suction port 7c.

  When the swash member 9 is rotated 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 7c, and the high pressure chamber is reduced. The refrigerant gas is compressed. Thus, the high-pressure refrigerant gas in the high-pressure chamber is discharged from the discharge port 7d until the top dead center P passes through the discharge port 7d of the support member 7. When the top dead center P passes through the suction port 7c of the support member 7, the volume of the low-pressure chamber increases, so that the refrigerant gas is sucked into the low-pressure chamber from the suction port 7c.

  The high-pressure refrigerant gas discharged from the high-pressure chamber to the discharge port 7d of the support member 7 passes through the passage 8a of the cylinder 8 and is discharged into the space (space R) of the notch 8b through the discharge valve 12, as described above. Subsequently, it discharges in the airtight container 1 through the notch part and through-hole of the supporting member 7. FIG. The high-pressure refrigerant gas discharged into the sealed container 1 passes through the gap between the drive elements 2 and reaches the upper region in the sealed container 1, where it is separated from the oil, discharged from the discharge pipe 23, and supplied to the refrigerant circuit. Is done. 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 24.

  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 has the continuous thick portion 9a and the thin portion 9b, and its upper surface 9c is inclined in a substantially sinusoidal shape, so that it corresponds to the high pressure chamber of the cylinder 8. In the thick portion 9a, the seal dimension between the inner wall surface of the compression space 20 can be sufficiently ensured. Thereby, generation | occurrence | production of the refrigerant | coolant gas leak between the swash member 9 and the cylinder 8 can be prevented now effectively, and the driving | operation with high compression efficiency is attained. Further, since the swash member 9 serves as a flywheel, torque fluctuation is reduced.

  In the above embodiment, when the cylinder 8 has the sub-bearing portion 21, it is not necessary to separately provide a sub-bearing support member for the rotating shaft 5, and the number of parts can be reduced and further miniaturization can be achieved. . Further, since the vane slot 16 and the spring mounting hole 17 for mounting the vane 11 on the support member 7 are provided, there is no need to provide a vane mounting mechanism in the cylinder 8 that requires high processing accuracy, and the workability is improved. The Furthermore, if the swash member 9 is formed integrally with the rotating shaft 5 as in the above embodiment, a member for attaching the swash member 9 to the rotating shaft 5 becomes unnecessary, and the number of parts can be further reduced.

  In the above embodiment, the compressor used by being incorporated in the refrigerant circuit of the refrigerator has been described. However, the present invention is not limited to this, and the present invention is effectively applied to, for example, an air compressor that sucks and compresses air. Can do.

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

It is a schematic longitudinal cross-sectional view which shows embodiment of the compressor which concerns on this invention. It is a schematic longitudinal cross-sectional view which passes along the location of the vane in embodiment of the compressor which concerns on this invention. It is a schematic cross-sectional view in the embodiment of the compressor concerning the present invention. It is a schematic cross-sectional top view which shows the state which provided the vane slot and the spring mounting hole in the support member in embodiment of the compressor based on this invention. The cover member in embodiment of the compressor which concerns on this invention is shown, (a) is the perspective view, (b) is a center longitudinal cross-sectional view. (A), (b) is a side view of the rotating shaft containing the swash member in embodiment of the compressor based on this invention. It is a one part schematic longitudinal cross-sectional view in other embodiment of the compressor based on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Drive element 3 Compression element 4 Stator 5 Rotating shaft 6 Rotor 7 Support member 8 Cylinder 9 Swash member (compression member)
DESCRIPTION OF SYMBOLS 11 Vane 12 Discharge valve 13 Main bearing part 13b Slit-like notch part 14 Protrusion part 15 Cover member 15f Spring receiving part 16 Vane slot 17 Spring mounting hole 18 Coil spring 19 Recessed part 20 Compression space 21 Sub bearing part 22 Suction piping 23 Discharge piping 24 Oil sump 25 Cover plate member

Claims (3)

  A driving element and a compression element driven by the driving element are arranged in the hermetic container, and the compression element is fixed to the hermetic container and is supported by penetrating a rotating shaft fixed to the rotor of the driving element. A member, a cylinder which is fixed to the support member to form a compression space, and which is coaxially fixed to the rotation shaft and rotates in the compression space of the cylinder so that one surface makes one turn around the rotation shaft. A compression member formed on a substantially sinusoidal inclined surface that returns to the top dead center through a bottom dead center that is lowest from the dead center, and a tip that is attached to a vane slot provided in the support member via a spring. A vane that constantly contacts the inclined surface of the compression member and divides the compression space into a low pressure chamber and a high pressure chamber, and compresses the fluid sucked into the low pressure chamber by the compression member and discharges the fluid from the high pressure chamber; Pressure A machine, wherein the support member main bearing portion for supporting the rotary shaft is formed integrally with the compressor in which the vane slot is characterized in that provided through the support member.   The compressor according to claim 1, wherein the vane slot is provided so as to penetrate the support member in the vertical direction, and a lid member that closes an upper end opening of the vane slot is fixed to the support member.   The compressor according to claim 2, wherein a spring receiving portion is provided on a lower surface side of the lid member, and an upper end of the spring is attached to the spring receiving portion, and the vane is attached to a lower end of the spring.

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