JP7012843B2 - Sealed compressor and manufacturing method of sealed compressor - Google Patents

Description

The present invention relates to a closed type compressor used in a refrigerating cycle such as an air conditioner, a refrigerator or a refrigerator, and a method for manufacturing a closed type compressor.

Conventional closed compressors include rotary compressors that compress refrigerant by combining a rotating piston and cylinder. In this rotary compressor, a piston is housed in a cylinder, and a vane urged by a spring abuts on the piston to form a compression chamber in the cylinder. The spring that urges the vane is housed in a spring insertion hole formed in the cylinder, and the spring is held by the cylinder. However, in the configuration where the spring is held by the cylinder, the distance between the back of the vane and the closed container is narrow. Therefore, when the vane reaches the top dead center of the reciprocating motion, the total length of the spring reaches almost the close contact length of the spring, the stress generated in the spring becomes large, and the spring may be fatigued and fractured. Therefore, in order to reduce the stress generated in the spring, a closed type compressor in which the spring attachment interval is lengthened by providing a protruding container in the closed container has been proposed (for example, Patent Document 1). In recent years, the stroke volume of closed-type compressors has expanded, and the expansion and contraction allowance of the spring that slides the vane is limited. Therefore, it is becoming more important to secure the expansion and contraction allowance of the spring that slides the vane. ing.

Japanese Unexamined Patent Publication No. 63-16189

The closed type compressor of Patent Document 1 has a configuration in which a protruding container protruding from the closed container is provided and a spring is arranged in the protruding container. However, in the closed compressor of Patent Document 1, if the assembly accuracy between the closed container and the cylinder is poor, the positional relationship between the spring and the vane may be displaced, and for example, the spring may be twisted when the spring expands or contracts. The spring may not expand and contract as designed.

The present invention solves the above-mentioned problems, and secures the expansion / contraction allowance of the spring that slides the vane used in the sealed compressor, and secures the accuracy of the positional relationship between the spring and the vane. A method for manufacturing a type compressor and a closed type compressor is obtained.

The closed type compressor according to the present invention is in contact with a closed container, a hollow cylinder housed in the closed container, a rolling piston that rotates eccentrically along the inner peripheral wall of the cylinder, and an outer peripheral wall of the rolling piston, and the cylinder. A vane that divides the inner space into a suction chamber and a compression chamber, a spring that urges the vane to the placement side of the rolling piston, and a hollow portion that protrudes from the closed container and accommodates the spring, and the spring expands and contracts. A tubular spring guide that defines the direction and is directly fixed to the closed container so as to protrude from the closed container, forming a closed space together with the closed container, accommodating the spring guide inside, and with the spring guide. It comprises a protruding container that forms a space between them , the cylinder is formed with an insertion hole into which a spring is inserted, and the spring guide has one end fixed to the cylinder and a hollow portion inserted. It communicates with the hole, the other end is closed by the bottom lid, and the spring is located between the back end of the vane located on the opposite side of the rolling piston and the bottom lid. Is what you are doing.

The closed compressor according to the present invention has a cylindrical spring guide that protrudes from the closed container, forms a hollow portion for accommodating the spring, and defines the expansion / contraction direction of the spring. One end of this spring guide is fixed to the cylinder, the hollow portion and the insertion hole of the spring formed in the cylinder communicate with each other, and the other end is closed by the bottom lid portion. .. The spring is arranged between the rear end of the vane located on the opposite side of the rolling piston and the bottom lid. Therefore, in the closed compressor, the spring is arranged between the back end of the vane and the bottom lid of the spring guide protruding from the closed container, so that the spring is placed between the back end of the vane and the closed container. It is possible to secure the expansion and contraction allowance of the spring rather than being arranged in. Further, in the closed type compressor, by fixing the spring guide directly to the cylinder, the holding part of the spring with respect to the cylinder is only the spring guide, and the position accuracy between the spring and the vane can be ensured.

It is a vertical sectional view of the closed type compressor which concerns on Embodiment 1 of this invention. FIG. 3 is a schematic cross-sectional view taken along the line AA of the upper cylinder in the compression mechanism portion of FIG. It is a flow chart which shows the manufacturing process of the closed type compressor of FIG. FIG. 3 is a schematic cross-sectional view of a modified example of the protruding container shown in FIG. It is a vertical sectional view of the closed type compressor which concerns on Embodiment 2 of this invention.

Hereinafter, the closed type compressor 100 and the closed type compressor 110 according to the embodiment of the present invention will be described with reference to the drawings and the like. In the following drawings including FIG. 1, the relative dimensional relationships and shapes of the constituent members may differ from the actual ones. Further, in the following drawings, those having the same reference numerals are the same or equivalent thereof, and this shall be common to the entire text of the specification. In addition, terms that indicate directions (for example, "top", "bottom", "right", "left", "front", "rear", etc.) are used as appropriate for ease of understanding, but these notations are used. For convenience of explanation, it is described as such, and does not limit the arrangement and orientation of the device or component.

Embodiment 1.
[Sealed compressor 100]
FIG. 1 is a vertical cross-sectional view of the closed compressor 100 according to the first embodiment of the present invention. The closed compressor 100 is one of the elements constituting the refrigerating cycle used in, for example, an air conditioner, a refrigerator, a refrigerator, a vending machine, a water heater, and the like. The closed type compressor 100 is a twin rotary type compressor that constitutes two compression chambers. The closed compressor 100 has a closed container 10 and an electric mechanism unit 20 and a compression mechanism unit 30 housed inside the closed container 10. Further, the closed type compressor 100 has an accumulator 13 outside the closed container 10, and has a suction pipe 11 for connecting the closed container 10 and the accumulator 13. Further, the closed compressor 100 has a protruding container 50 for accommodating a spring 36 for urging a vane 35, which will be described later.

(Sealed container 10)
The closed container 10 constitutes the outer shell of the closed compressor 100. The closed container 10 is composed of a substantially cylindrical middle container 10a, an upper container 10b that closes the upper opening of the middle container 10a, and a lower container 10c that closes the lower opening of the middle container 10a. In the closed container 10, the upper container 10b is fitted in the upper opening of the middle container 10a, and the lower container 10c is fitted in the lower opening of the middle container 10a to maintain the closed state. A suction pipe 11 to which the accumulator 13 is attached is connected to the middle container 10a, and a discharge pipe 12 is connected to the upper container 10b. The suction pipe 11 is a connecting pipe for sending the gas refrigerant (low temperature and low pressure) sucked through the accumulator 13 into the compression mechanism unit 30. The discharge pipe 12 is a connection pipe for discharging the gas refrigerant (high temperature and high pressure) in the closed container 10 compressed by the compression mechanism unit 30 to the outside of the closed container 10. The closed container 10 is arranged on the pedestal 14, and the lower container 10c is fixed to the pedestal 14. In the sealed compressor 100, the pedestal 14 is fixed to the installation location by bolts or the like in a normal installation state.

(Electric mechanism unit 20)
The electric mechanism unit 20 generates a rotary motion for rotating the rotary shaft 32 inside the closed container 10. The electric mechanism portion 20 is arranged above the compression mechanism portion 30 in the closed container 10. The electric mechanism portion 20 includes a stator 21 fixed to the inner peripheral wall of the central container 10a, and a rotor 22 rotatably fitted to the inner peripheral side of the stator 21. The stator 21 is fixed to the inner container 10a of the closed container 10 by various fixing methods such as shrink fitting and welding. A rotating shaft 32 extending downward is fixed to the center of the rotor 22. The stator 21 rotates the rotor 22 by electric power supplied from the outside of the closed compressor 100.

(Compression mechanism unit 30)
The compression mechanism unit 30 is housed in the closed container 10 and compresses the refrigerant flowing into the closed container 10. The compression mechanism portion 30 is arranged below the electric mechanism portion 20 and is fixed to the central container 10a. The compression mechanism portion 30 has a cylinder 31 having a substantially cylindrical shape. The compression mechanism portion 30 further includes a rotating shaft 32, a rolling piston 33, a vane 35, a spring 36, an upper bearing 38, a lower bearing 39, a partition plate 37, a spring guide 40, and a projecting container 50. It is equipped with.

The closed compressor 100 has at least one hollow cylinder 31 housed in the closed container 10 in the compression mechanism unit 30. The closed compressor 100 may have a plurality of cylinders 31 as shown in FIG. That is, as shown in FIG. 1, the compression mechanism unit 30 may be composed of a plurality of cylinders 31 of the upper cylinder 31A and the lower cylinder 31B. The cylinder 31 is a general term for a plurality of cylinders such as an upper cylinder 31A and a lower cylinder 31B. In the closed container 10, the substantially cylindrical upper cylinder 31A is arranged above the substantially cylindrical lower cylinder 31B. An upper bearing 38 is arranged in contact with the upper end surface of the upper cylinder 31A on the upper portion of the upper cylinder 31A, and the upper bearing 38 closes the upper end surface of the upper cylinder 31A. A lower bearing 39 is arranged in contact with the lower end surface of the lower cylinder 31B at the lower portion of the lower cylinder 31B, and the lower bearing 39 closes the lower end surface of the lower cylinder 31B. The partition plate 37 is arranged between the upper cylinder 31A and the lower cylinder 31B, and closes the lower end surface of the upper cylinder 31A and the upper end surface of the lower cylinder 31B.

FIG. 2 is a schematic cross-sectional view taken along the line AA of the upper cylinder 31A in the compression mechanism portion 30 of FIG. However, FIG. 2 shows the AA line cross section rotated 90 degrees counterclockwise. Hereinafter, the configuration of the compression mechanism unit 30 will be further described with reference to FIGS. 2 and 1. The relationship between the rolling piston 33, the vane 35, and the spring 36 in the upper cylinder 31A, and the relationship between the rolling piston 33, the vane 35, and the spring 36 in the lower cylinder 31B are the same. Therefore, in the following description, the upper cylinder 31A and the lower cylinder 31B will not be described separately, but will be described using the cylinder 31, which is a general term for the upper cylinder 31A and the lower cylinder 31B. Further, in FIG. 2, the illustration of the eccentric portion 32a arranged in the cylinder 31 is omitted.

As shown in FIG. 2, the cylinder 31 has a peripheral wall portion 31b formed in a cylindrical shape, and a cylinder chamber 31d concentric with the rotation shaft 32 is formed by the inner peripheral wall portion 31b1 of the peripheral wall portion 31b. A rolling piston 33 is arranged inside the peripheral wall portion 31b, and the inner peripheral wall 31b1 of the peripheral wall portion 31b faces the outer peripheral wall 33a of the rolling piston 33 formed in a cylindrical shape. A vane groove 31e is formed in the peripheral wall portion 31b of the cylinder 31 in the radial direction from the inner peripheral wall 31b1 toward the outer peripheral wall 31f side. A vane 35 is slidably arranged in the vane groove 31e. The cylinder chamber 31d is divided into a suction chamber 31d1 leading to the suction hole 34 and a compression chamber 31d2 leading to the discharge hole 34B by the vane 35. That is, the cylinder 31 is formed in a cylindrical shape, and the cylinder chamber 31d constituting the suction chamber 31d1 and the compression chamber 31d2 is formed in the space surrounded by the inner peripheral wall 31b1 of the cylinder 31.

In the peripheral wall portion 31b of the cylinder 31, an insertion hole 31g into which the spring 36 is inserted is formed between the vane groove 31e and the outer peripheral wall 31f of the cylinder 31 along the radial direction of the cylinder 31. A spring 36 that urges the vane 35 to the arrangement side of the rolling piston 33 is inserted into the insertion hole 31g from the outer peripheral wall 31f side. The insertion hole 31g includes an outer peripheral side insertion hole 31g2 formed on the outer peripheral wall 31f side of the cylinder 31 and an inner peripheral side insertion hole 31g1 formed on the inner peripheral wall 31b1 side of the cylinder 31, that is, the vane groove 31e side. Have. The cross-sectional shapes of the outer peripheral side insertion hole 31g2 and the inner peripheral side insertion hole 31g1 are both circular. When the diameter of the outer peripheral side insertion hole 31g2 is φD and the diameter of the inner peripheral side insertion hole 31g1 is φd, φd is smaller than φD (φd <φD). That is, the insertion hole 31g has a plurality of portions having different diameters in the central axis direction of the insertion hole 31g from the outer peripheral wall 31f side of the cylinder 31 toward the inner peripheral wall 31b1 side. The insertion hole 31g is formed between the outer peripheral wall 31f and the vane groove 31e with a diameter as small as the vane groove 31e side. The central axis of the outer peripheral side insertion hole 31g2 and the central axis of the inner peripheral side insertion hole 31g1 are coaxial, and both central axes intersect with the central axis C of the rotation shaft 32 extending perpendicularly to the paper surface.

The peripheral wall portion 31b of the cylinder 31 is formed with suction holes 34 and discharge holes 34B arranged on both sides of the vane groove 31e in the circumferential direction. A suction pipe 11A is connected to the suction hole 34 of the upper cylinder 31A, and a suction pipe 11B is connected to the suction hole 34 of the lower cylinder 31B. The above-mentioned suction pipe 11 is a general term for the suction pipe 11A and the suction pipe 11B. The discharge hole 34B is formed from the inner peripheral wall 31b1 of the cylinder 31 toward the outer side in the radial direction, and communicates with the space inside the closed container 10 through the discharge hole (not shown) formed in the upper bearing 38. There is.

As shown in FIG. 1, the rotating shaft 32 has an eccentric portion 32a eccentric in one radial direction on one end side in the axial direction. Further, the rotating shaft 32 is fixed by inserting the other end side in the axial direction into the central portion of the rotor 22 of the electric mechanism portion 20. The rotary shaft 32 is rotatably supported by the upper bearing 38 and the lower bearing 39, and rotates together with the rotor 22.

As shown in FIGS. 1 and 2, the closed compressor 100 has a rolling piston 33 in the compression mechanism portion 30 that rotates eccentrically along the inner peripheral wall 31b1 of the cylinder 31. The rolling piston 33 is located at a position eccentric with respect to the central axis C of the rotating shaft 32, and is mounted on the eccentric portion 32a of the rotating shaft 32 in the cylinder chamber 31d so as to rotate with the rotating shaft 32. The rolling piston 33 rotates eccentrically in the cylinder chamber 31d due to the rotation of the rotating shaft 32.

As shown in FIGS. 1 and 2, the closed compressor 100 contacts the outer peripheral wall 33a of the rolling piston 33 in the compression mechanism portion 30, and divides the space inside the cylinder 31 into a suction chamber 31d1 and a compression chamber 31d2. Has a vane 35 to be used. The tip portion 35a of the vane 35 comes into contact with the outer peripheral wall 33a of the rolling piston 33 due to the urging force of the spring 36. The vane 35 is slidably in contact with the outer peripheral wall 33a of the rolling piston 33.

As shown in FIGS. 1 and 2, the closed compressor 100 has a spring 36 that urges the vane 35 to the arrangement side of the rolling piston 33 in the compression mechanism portion 30. As shown in FIG. 2, the spring 36 is arranged at the rear end portion 35b of the vane 35 located on the opposite side of the rolling piston 33 in the radial direction of the cylinder 31. Further, the spring 36 is housed in a spring guide 40, which will be described later. The spring 36 is slidably arranged in the hollow portion 40e of the spring guide 40. The spring 36 is a compression coil spring that is compressed and utilizes a reaction force, and is a cylindrical coil spring. The spring 36 is preferably a cylindrical coil spring, but is not limited to the cylindrical coil spring. Since the spring 36 is guided by the spring guide 40, it is desirable that the spring 36 has the same outer diameter of the coil in the free length direction of the spring 36. Therefore, for example, if the spring guide 40 has an elliptical shape in a vertical cross section, an elliptical coil spring may be used for the spring 36. One end 36b of the spring 36 in the free length direction is fixed to the bottom lid 40c of the spring guide 40, and the other end 36a is attached to the back end 35b of the vane 35. That is, the spring 36 is arranged between the back surface side end portion 35b of the vane 35 located on the opposite side of the rolling piston 33 and the bottom lid portion 40c of the spring guide 40.

As shown in FIGS. 1 and 2, the closed compressor 100 projects from the closed container 10 and forms a hollow portion 40e for accommodating the spring 36 in the compression mechanism portion 30, and defines the expansion / contraction direction of the spring 36. It has a cylindrical spring guide 40 to be used. The spring guide 40 is a cylindrical member that houses the spring 36 inside. One end 40a of the spring guide 40 is inserted into an insertion hole 31g formed in the outer peripheral wall 31f of the cylinder 31 and fixed to the cylinder 31. More specifically, the spring guide 40 has one end 40a inserted into the outer peripheral side insertion hole 31g2 of the insertion hole 31g and fixed to the cylinder 31. A spring guide 40 is fixed to each of the plurality of cylinders 31 of the upper cylinder 31A and the lower cylinder 31B. The end surface of the end portion 40a of the spring guide 40 is arranged so as to face the stepped surface between the outer peripheral side insertion hole 31g2 and the inner peripheral side insertion hole 31g1 of the insertion hole 31g. The spring guide 40 is, for example, press-fitted into and fixed to the outer peripheral side insertion hole 31g2 of the cylinder 31. More specifically, for example, the seal tube 31h is press-fitted into the outer peripheral side insertion hole 31g2 of the cylinder 31. The seal tube 31h is a cylindrical tube. The outer diameter of the seal tube 31h is larger than the inner diameter of the outer peripheral side insertion hole 31g2 before the seal tube 31h is press-fitted into the outer peripheral side insertion hole 31g2. Further, the end portion 40a of the spring guide 40 is press-fitted into the seal tube 31h. The outer diameter of the spring guide 40 is larger than the inner diameter of the seal pipe 31h before the spring guide 40 is press-fitted into the seal pipe 31h. When the spring guide 40 is fixed to the cylinder 31, the hollow portion 40e of the spring guide 40 and the inner peripheral side insertion hole 31g1 of the insertion hole 31g formed in the cylinder 31 communicate with each other. At this time, it is desirable that the inner diameter of the hollow portion 40e and the inner diameter of the inner peripheral side insertion hole 31g1 match. The bottom lid portion 40c of the spring guide 40 is arranged at the other end portion 40b, and the opening of the hollow portion 40e on the end portion 40b side is closed by the bottom lid portion 40c. The spring guide 40 is housed in the projecting container 50.

The spring guide 40 has an inner wall along the outer diameter of the coil of the spring 36. The spring guide 40 may have, for example, an inner wall having a circular cross-sectional shape if the spring 36 is a cylindrical coil spring, and may have an elliptical cross-sectional inner wall if the spring 36 is an elliptical coil spring. The spring guide 40 regulates the radial movement of the spring 36 so that the deviation of the axis of the spring 36 does not become large. Since the spring guide 40 regulates the radial movement of the spring 36, it is desirable that the inner diameter of the spring guide 40 is formed to be slightly larger than the outer diameter of the coil of the spring 36. That is, it is desirable that the distance between the inner wall of the spring guide 40 and the outer diameter of the coil of the spring 36 is small. The spring 36 can be prevented from twisting by being guided by the inner wall of the spring guide 40 during expansion and contraction.

Since the vane 35 arranged in the vane groove 31e slides along the inner wall of the cylinder 31, the more parts that hold the spring 36 with respect to the cylinder 31, the more between the spring 36 and the vane 35. It becomes difficult to secure the position accuracy. By directly fixing the spring guide 40 to the cylinder 31, the only component that holds the spring 36 with respect to the cylinder 31 is the spring guide 40, and the positional accuracy between the spring 36 and the vane 35 can be ensured.

As shown in FIG. 1, a through hole having a diameter at least the size of the outer diameter of the spring guide 40 is formed in the inner container 10a of the closed container 10 so that the spring guide 40 and the upper cylinder 31A can be joined. ing. Similarly, the inner container 10a of the closed container 10 is formed with a through hole having a diameter at least the size of the outer diameter of the spring guide 40 so that the spring guide 40 and the lower cylinder 31B can be joined. Alternatively, even if one through hole is formed in the inner container 10a of the closed container 10 so that the spring guide 40 and the upper cylinder 31A can be joined and the spring guide 40 and the lower cylinder 31B can be joined. good.

As shown in FIGS. 1 and 2, the closed compressor 100 protrudes from the closed container 10 and is joined to the closed container 10 to form a closed space together with the closed container 10 and houses the spring guide 40 inside. It has a protruding container 50. The projecting container 50 has a tubular portion 51 and a projecting container lid 52. The tubular portion 51 is a member formed in a cylindrical shape for accommodating the spring guide 40 in the hollow portion 50e. One end 50a of the tubular portion 51 of the projecting container 50 is fixed to the middle container 10a of the closed container 10. Further, the tubular portion 51 of the projecting container 50 has a projecting container lid 52 arranged at the other end 50b. The protruding container lid 52 closes the end portion 50b of the tubular portion 51 located on the side opposite to the side to be fixed to the closed container 10. In the tubular portion 51, the opening of the hollow portion 50e on the end portion 50b side is closed by the protruding container lid 52.

As shown in FIG. 1, the projecting container 50 accommodates the spring guide 40 fixed to the lower cylinder 31B as well as the spring guide 40 fixed to the lower cylinder 31A in the hollow portion 50e of the tubular portion 51. That is, the projecting container 50 accommodates a plurality of spring guides 40, which are a spring guide 40 fixed to the upper cylinder 31A and a spring guide 40 fixed to the lower cylinder 31B, in one projecting container 50. In the projecting container 50, the internal space surrounded by the tubular portion 51, the projecting container lid 52, the cylinder 31, and the spring guide 40 is a closed space. Alternatively, in the projecting container 50, the internal space surrounded by the tubular portion 51, the projecting container lid 52, the cylinder 31, the spring guide 40, and the central container 10a is a closed space.

FIG. 3 is a flow chart showing a manufacturing process of the sealed compressor 100 of FIG. It is desirable that the projecting container 50 is attached to the closed container 10 in the following order. When the step of attaching the protruding container 50 to the closed container 10 is started, a joining step of joining the cylindrical portion 51 formed in a cylindrical shape protruding from the closed container 10 to the middle container 10a of the closed container 10 constituting the outer shell is performed. (Step S1). Next, a cylinder fixing step of fixing the hollow cylinder 31 in which the rolling piston 33 is housed in the inner container 10a of the closed container 10 is performed (step S2). Next, a vane placement step of arranging the vane 35 in the vane groove 31e formed in the cylinder 31 is performed (step S3). Next, a cylindrical spring guide 40 that defines the expansion / contraction direction of the spring 36 that urges the vane 35 to the arrangement side of the rolling piston 33 is inserted from the hollow portion 50e of the tubular portion 51 and fixed to the cylinder 31. Perform the fixing step (step S4). Next, a spring mounting step is performed in which the spring 36 is inserted into the spring guide 40, one end of the spring 36 is brought into contact with the vane 35, and the other end is fixed to the bottom lid portion 40c of the spring guide 40 (step S5). Finally, a closing step of sealing the inside of the tubular portion 51 by joining the end portion 50b located on the side opposite to the side fixed to the closed container 10 of the tubular portion 51 and the protruding container lid 52 is performed ( Step S6). By going through the steps S1 to S6, the step of attaching the protruding container 50 to the closed container 10 is completed. By attaching the projecting container 50 to the closed container 10 as described above, thermal distortion of the spring guide 40 and the spring 36 can be prevented, and the inside of the projecting container 50 can be sealed.

In the joining step (step S1), the tubular portion 51 of the protruding container 50 and the middle container 10a of the closed container 10 can be joined by resistance welding by using the protruding container 50 as an iron member. In the closing step (step S6), for example, the tubular portion 51 made of an iron member and the protruding container lid 52 made of an iron member are joined by resistance welding. Alternatively, in the closing step (step S6), for example, the protruding container lid 52 is made of a copper member or a copper-plated iron member, so that the tubular portion 51 and the protruding container lid 52 are joined by brazing. .. Brazing is performed by a low heat input joining method such as high frequency brazing.

FIG. 4 is a schematic cross-sectional view of a modified example of the projecting container 50 shown in FIG. As shown in FIG. 4, the tubular portion 51 can be composed of a structure divided into two, a front tubular portion 51a and a rear tubular portion 51b. The front cylindrical portion 51a and the rear tubular portion 51b are tubular members that accommodate the spring guide 40 in the hollow portion 50e. One end 50a of the front cylindrical portion 51a of the projecting container 50 is fixed to the middle container 10a of the closed container 10, and the end 50d of the rear tubular portion 51b is fitted to the other end 50c. It is combined and connected. The thickness of the peripheral wall of the front cylindrical portion 51a becomes thinner toward the end portion 50a, and the front tubular portion 51a is formed in a tapered shape. One end 50b of the rear tubular portion 51b of the projecting container 50 is fitted and connected to the end 50c of the front tubular portion 51a, and the projecting container lid 52 is arranged at the other end 50b. ing. In the rear cylindrical portion 51b of the projecting container 50, the opening of the hollow portion 50e on the end portion 50b side is closed by the projecting container lid 52.

In the joining step (step S1), by using the front tubular portion 51a as an iron member, the front tubular portion 51a of the protruding container 50 and the middle container 10a of the closed container 10 can be joined by resistance welding. In the closing step (step S6), the rear tubular portion 51b of the projecting container 50 and the projecting container lid 52 can be joined by brazing by forming the rear tubular portion 51b and the projecting container lid 52 into copper members. can. As a brazing method for joining the rear tubular portion 51b and the protruding container lid 52, for example, high frequency brazing, gas brazing, or the like is used. The front cylindrical portion 51a and the rear tubular portion 51b can be joined, for example, by brazing in a furnace or the like by using the front tubular portion 51a as an iron member and the rear tubular portion 51b as a copper member. .. In addition, either one or both of the rear tubular portion 51b and the protruding container lid 52 is made of an iron member, and the iron member is copper-plated so that both the rear tubular portion 51b and the protruding container lid 52 can be used. The strength of the projecting container 50 can be increased as compared with the case where the member is made of copper. Further, when both the rear tubular portion 51b and the protruding container lid 52 are made of iron, the rear tubular portion 51b and the protruding container lid 52 can be joined by resistance welding.

[Operation of closed compressor 100]
Next, the operation of the closed type compressor 100 will be described with reference to FIGS. 1 and 2. In the closed compressor 100, when the rotating shaft 32 is rotated by the drive of the electric mechanism unit 20, the rolling piston 33 in the cylinder 31 also rotates together with the rotating shaft 32. The rolling piston 33 rotates eccentrically, and the vane 35 slidably abutting the rolling piston 33 moves as a piston due to the rotation of the rolling piston 33. At this time, the gas refrigerant enters the cylinder chamber 31d surrounded by the inner peripheral wall 31b1 of the cylinder 31, the rolling piston 33 and the vane 35 from the suction hole 34 of the compression mechanism portion 30 via the suction pipe 11. Then, the gas refrigerant in the cylinder chamber 31d is compressed as the volume in the compression chamber 31d2 becomes smaller as the rolling piston 33 rotates.

In the compression step of the compression mechanism portion 30, the tip portion 35a of the vane 35 is in contact with the outer peripheral wall 33a of the rolling piston 33 due to the urging force of the spring 36. Then, the vane 35 slides in the vane groove 31e in the radial direction of the cylinder 31 with the eccentric rotation of the rolling piston 33. At this time, the spring 36 expands and contracts along the inner wall of the spring guide 40, and the expansion and contraction direction of the spring 36 is guided by the inner wall of the spring guide 40.

The gas refrigerant compressed in the compression chamber 31d2 is discharged into the internal space of the closed container 10 from a discharge port (not shown) provided in the upper bearing 38. The gas refrigerant orbiting the internal space of the closed container 10 passes through a gas hole (not shown) provided in the rotor 22 and a gap between the stator 21 and the rotor 22, respectively, in the closed container. It reaches the upper part of the inside of the 10 and is discharged from the discharge pipe 12 into the refrigerant circuit outside the closed container 10.

As described above, the closed type compressor 100 protrudes from the closed container 10 and has a cylindrical spring guide 40 that forms a hollow portion 40e for accommodating the spring 36 and defines the expansion / contraction direction of the spring 36. In this spring guide 40, one end 40a is fixed to the cylinder 31, and the hollow portion 40e and the insertion hole 31g of the spring 36 formed in the cylinder 31 communicate with each other, and the other end 40b communicates with each other. It is closed by the bottom lid portion 40c. The spring 36 is arranged between the rear end portion 35b of the vane 35 located on the opposite side of the rolling piston 33 and the bottom lid portion 40c of the spring guide 40 protruding from the closed container 10. The spring 36 of the closed type compressor 100 is sealed with the back side end portion 35b by being arranged between the back side end portion 35b of the vane 35 and the bottom lid portion 40c of the spring guide 40 protruding from the closed container 10. It is possible to secure an expansion / contraction allowance as compared with the case where it is arranged between the container 10 and the container 10. Further, in the closed type compressor 100, by directly fixing the spring guide 40 to the cylinder 31, the holding part between the cylinder 31 and the spring 36 is only the spring guide 40, and the position between the spring 36 and the vane 35. Accuracy can be ensured.

Further, the sealed compressor 100 has a plurality of cylinders 31, a plurality of spring guides 40 are fixed to each of the plurality of cylinders 31, and the projecting container 50 accommodates the plurality of spring guides 40. Since the projecting container 50 accommodates a plurality of spring guides 40, the joining step (step S1) may be performed once, and the closed compressor 100 is compared with the case where the joining step is provided for each spring guide 40. The manufacturing process can be simplified.

Further, the protruding container 50 closes the tubular portion 51 formed in a cylindrical shape and fixed to the closed container 10 and the end portion 50b of the tubular portion 51 located on the opposite side to the side fixed to the closed container 10. It has a protruding container lid 52 and a lid 52. The spring guide 40 and the spring 36 are attached from the tubular portion 51 fixed to the closed container 10, and then the tubular portion 51 is closed by the protruding container lid 52 to prevent thermal distortion of the spring guide 40 and the spring 36. The inside of the protruding container 50 can be sealed.

Further, the tubular portion 51 has a front tubular portion 51a fixed to the closed container and a rear tubular portion 51b that is fitted with the front tubular portion 51a and in which the protruding container lid 52 is arranged. By dividing the tubular portion 51, the length of the wall in the axial direction is shortened, and the operator can perform the joining step (step S1), the cylinder fixing step (step S2), the spring guide fixing step (step S4), and the spring. Work becomes easier in each step of the mounting step (step S5).

Further, the manufacturing method of the sealed compressor 100 includes a joining step (step S1), a cylinder fixing step (step S2), a vane placement step (step S3), a spring guide fixing step (step S4), and a spring mounting. It has a step (step S5) and a closing step (step S6). By attaching the projecting container 50 to the closed container 10 as described above, the operator can prevent thermal distortion of the spring guide 40 and the spring 36 and seal the inside of the projecting container 50.

Further, in the manufacturing method of the closed type compressor 100, in the closing step (step S6), the tubular portion 51 made of an iron member and the protruding container lid 52 made of an iron member are joined by resistance welding. .. Alternatively, in the closing step (step S6), the tubular portion 51 and the protruding container lid 52 are joined by brazing. By joining the tubular portion 51 and the protruding container lid 52 by a low heat input joining method, thermal distortion of the spring guide 40 and the spring 36 can be prevented, and the inside of the protruding container 50 can be sealed.

Embodiment 2.
FIG. 5 is a vertical sectional view of the sealed compressor 110 according to the second embodiment of the present invention. Parts having the same configuration as the closed compressor 100 of FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be omitted. Items not particularly described in the closed compressor 110 according to the second embodiment are the same as those of the closed compressor 100 according to the first embodiment of the invention, and the same functions and configurations are described using the same reference numerals. I will do it.

In the closed type compressor 100 according to the first embodiment, the number of protruding containers 50 fixed to the central container 10a is always one regardless of the number of cylinders 31 arranged in the closed container 10. On the other hand, in the closed type compressor 110 according to the second embodiment, the number of protruding containers 50 fixed to the central container 10a changes according to the number of cylinders 31 arranged in the closed container 10. Is. That is, the closed compressor 110 has a plurality of projecting containers 50 having the same number as the number of the plurality of cylinders 31. Each of the plurality of projecting containers 50 accommodates one spring guide 40. For example, as shown in FIG. 5, in the closed type compressor 110 according to the second embodiment, when the number of cylinders 31 arranged in the closed container 10 is two, the upper cylinder 31A and the lower cylinder 31B, the middle portion. The number of projecting containers 50 fixed to the container 10a is also two. In the two projecting containers 50, the spring guide 40 fixed to the upper cylinder 31A is housed in one projecting container 50, and the spring guide 40 fixed to the lower cylinder 31B is housed in the other projecting container 50. It is contained.

As described above, the sealed compressor 110 has a plurality of cylinders 31, and a plurality of spring guides 40 are fixed to the plurality of cylinders 31, respectively. The closed compressor 110 has a plurality of projecting containers 50 having the same number as the number of the plurality of cylinders 31, and each of the plurality of projecting containers 50 accommodates one spring guide 40. By accommodating one spring guide 40 in each of the plurality of projecting containers 50, for example, even if the fixing positions of the cylinders 31 of the plurality of spring guides 40 are different in the circumferential direction, a closed space is provided for each spring 36. Can be formed.

The embodiment of the present invention is not limited to the above-described first and second embodiments, and various modifications can be made. For example, the closed compressor 100 and the closed compressor 110 have described a twin rotary compressor having two cylinders 31, but the closed compressor 100 and the closed compressor 110 have one cylinder 31. It may be a single rotary type compressor. Further, in the closed type compressor 100, the cross-sectional shape of the insertion hole 31g is formed in a circular shape, but for example, the insertion hole 31g may be formed in an elliptical shape, an oval shape, or a polygonal shape. In this case, the cross-sectional shape of the spring guide 40 formed in a cylindrical shape is formed into an elliptical shape, an oval shape, or a polygonal shape according to the cross-sectional shape of the insertion hole 31 g.

10 Closed container, 10a middle container, 10b upper container, 10c lower container, 11 suction pipe, 11A suction pipe, 11B suction pipe, 12 discharge pipe, 13 accumulator, 14 pedestal, 20 electric mechanism, 21 stator, 22 rotor , 30 compression mechanism, 31 cylinder, 31A upper cylinder, 31B lower cylinder, 31b peripheral wall, 31b1 inner peripheral wall, 31d cylinder chamber, 31d1 suction chamber, 31d2 compression chamber, 31e vane groove, 31f outer wall, 31g insertion hole, 31g1 Inner circumference side insertion hole, 31g2 Outer circumference side insertion hole, 31h seal tube, 32 rotation shaft, 32a eccentric part, 33 rolling piston, 33a outer peripheral wall, 34 suction hole, 34B discharge hole, 35 vane, 35a tip part, 35b back side End, 36 spring, 36a end, 36b end, 37 partition plate, 38 upper bearing, 39 lower bearing, 40 spring guide, 40a end, 40b end, 40c bottom lid, 40e hollow, 50 protruding container , 50a end, 50b end, 50c end, 50d end, 50e hollow part, 51 tubular part, 51a front tubular part, 51b rear tubular part, 52 protruding container lid, 100 sealed compressor, 110 Sealed compressor.

Claims (8)

With a closed container
The hollow cylinder housed in the closed container and
A rolling piston that rotates eccentrically along the inner peripheral wall of the cylinder,
A vane that comes into contact with the outer peripheral wall of the rolling piston and divides the space inside the cylinder into a suction chamber and a compression chamber.
A spring that urges the vane to the placement side of the rolling piston,
A cylindrical spring guide that protrudes from the closed container and forms a hollow portion for accommodating the spring and defines the expansion / contraction direction of the spring.
It is directly fixed to the closed container so as to protrude from the closed container, forms a closed space together with the closed container, accommodates the spring guide inside, and forms a space between the spring guide and the spring guide. With a protruding container,
Equipped with
The cylinder is formed with an insertion hole into which the spring is inserted.
One end of the spring guide is fixed to the cylinder, the hollow portion communicates with the insertion hole, and the other end is closed by the bottom lid portion.
The spring is a closed compressor arranged between the rear end of the vane located on the opposite side of the rolling piston and the bottom lid. Has multiple cylinders
A plurality of the spring guides are fixed to the plurality of cylinders, respectively.
The closed compressor according to claim 1, wherein the protruding container accommodates a plurality of the spring guides. Has multiple cylinders
A plurality of the spring guides are fixed to the plurality of cylinders, respectively.
Having a plurality of the projecting containers as many as the number of the plurality of cylinders,
The closed compressor according to claim 1, wherein the plurality of projecting containers each house one spring guide. The protruding container is
A cylindrical portion formed in a cylindrical shape and fixed to the closed container,
A protruding container lid that closes the end of the cylindrical portion located on the side opposite to the side to be fixed to the closed container,
The sealed compressor according to any one of claims 1 to 3. The cylindrical portion is
The front cylindrical part fixed to the closed container and
With the rear tubular portion fitted to the front tubular portion and on which the protruding container lid is arranged,
The sealed compressor according to claim 4. A joining step of joining a cylindrical portion formed in a cylindrical shape protruding from the closed container to a closed container constituting the outer shell.
A cylinder fixing process for fixing a hollow cylinder in which a rolling piston is housed in the closed container,
The vane placement step of arranging the vanes in the vane grooves formed in the cylinder, and
A spring guide fixing step of inserting a cylindrical spring guide that defines the expansion / contraction direction of the spring that urges the vane to the arrangement side of the rolling piston from the hollow portion of the tubular portion and fixing the vane to the cylinder.
A spring mounting process in which the spring is inserted into the spring guide, one end of the spring is brought into contact with the vane, and the other end is fixed to the spring guide.
A closing step of joining the end of the tubular portion located on the side opposite to the side fixed to the closed container and the protruding container lid to seal the inside of the tubular portion.
A method for manufacturing a closed compressor having. In the closing step,
The method for manufacturing a closed compressor according to claim 6, wherein the cylindrical portion made of an iron member and the protruding container lid made of an iron member are joined by resistance welding. In the closing step,
The method for manufacturing a closed compressor according to claim 6, wherein the tubular portion and the protruding container lid are joined by brazing.

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