WO2021100168A1 - Sealed compressor, refrigeration cycle device, and sealed-compressor manufacturing method - Google Patents

Abstract

Provided is a sealed compressor having: a sealed container; a hollow cylinder that is accommodated inside the sealed container; a rolling piston that eccentrically rotates along an inner circumferential wall of the cylinder; a vane that reciprocates, in a vane groove provided on the cylinder, in a radial direction of the cylinder; and a spring that biases the vane toward the side where the rolling piston is disposed. The sealed compressor further includes: a protruding container which is provided so as to protrude toward the opposite side from the cylinder with respect to the sealed container in the radial direction of the cylinder, and one end of which is bonded to the sealed container to communicate with the inside of the sealed container and form a closed space; and a spring guide which is disposed in the closed space of the protruding container and inside which the spring is fixed. An insertion hole is formed in an outer circumferential wall of the cylinder, and one end of the spring guide is inserted into the insertion hole of the cylinder and is fixed therein.

Description

Manufacturing method of closed compressor, refrigeration cycle device and closed compressor

The present invention relates to a method for manufacturing a closed compressor, a refrigerating cycle device, and a closed compressor used in an air conditioner, a refrigerator, a refrigerator, or the like.

The closed compressor has an annular cylinder housed in a closed container, a rolling piston that rotates eccentrically in the cylinder, and a vane that reciprocates in a vane groove provided in the cylinder. The vane is urged by a spring so that the tip of the vane is constantly in contact with the rolling piston, and the space inside the cylinder is divided into a low pressure space and a high pressure space. Then, the rolling piston moves eccentrically in the cylinder, so that the volume of the low-pressure space is reduced to become a high-pressure space, and the refrigerant sucked into the cylinder is compressed.

In this type of closed compressor, the spring that urges the vane is housed in the spring insertion hole formed in the cylinder and held in the cylinder. In such a configuration in which the spring is held in the cylinder, the length of the spring is restricted by the distance between the end surface on the rear end side of the vane and the inner peripheral surface of the closed container, and cannot be made longer than that. Therefore, when the vane moves to the rearmost top dead center position of the reciprocating motion, the total length of the spring reaches the close contact length at which the spring contracts to the maximum, the stress generated in the spring increases, and the spring is damaged by fatigue. There is a risk of doing.

Therefore, there is a technique in which a space for accommodating the spring is secured outside the closed container to eliminate restrictions on the length of the spring and prevent fatigue damage due to excessive stress on the spring (see, for example, Patent Document 1). ..

Japanese Unexamined Patent Publication No. 63-16189

The closed compressor of Patent Document 1 has a configuration in which a protruding container protruding from the closed container in the radial direction of the cylinder to the opposite side of the cylinder is joined to the closed container, and a spring is arranged directly in the protruding container. is there. In the case of this configuration, if the assembly accuracy of the closed container and the cylinder is poor, the positional relationship between the protruding container and the cylinder joined to the closed container deviates from the regular position. The springs are required to be arranged along a direction orthogonal to the central axis of the cylinder. However, if the positional relationship between the protruding container and the cylinder deviates from the regular position, the positional relationship between the vane whose position is determined based on the cylinder and the spring whose position is determined based on the protruding container also deviates from the regular position. There was a problem that it would end up.

The present invention solves the above-mentioned problems, and provides a method for manufacturing a closed compressor, a refrigerating cycle device, and a closed compressor capable of ensuring the accuracy of the positional relationship between the spring and the vane. To do.

The closed compressor according to the present invention has 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 a cylinder in a vane groove provided in the cylinder. A vane that reciprocates in the radial direction of the cylinder, a spring that urges the vane to the placement side of the rolling piston, and a vane that protrudes from the closed container to the opposite side of the cylinder in the radial direction of the cylinder, and one of them is provided in the closed container. The outer wall of the cylinder is provided with a protruding container whose ends are joined to communicate with the inside of the closed container to form a closed space, and a spring guide which is arranged in the closed space of the protruding container and has a spring fixed inside. An insertion hole is formed in the spring guide, and one end of the spring guide is inserted into the insertion hole of the cylinder and fixed.

According to the present invention, since the spring guide is directly fixed to the cylinder, the positional accuracy between the spring fixed in the spring guide and the vane arranged in the vane groove of the cylinder can be ensured.

It is a schematic vertical sectional view of the closed type compressor which concerns on Embodiment 1. FIG. FIG. 5 is a schematic cross-sectional view taken along the line AA of FIG. FIG. 5 is a schematic cross-sectional view showing a structural example 1 of a contact portion between a protruding container and a closed container of the closed compressor according to the first embodiment. It is sectional drawing which shows the structural example 2 of the contact part between the projecting container and the closed container of the closed type compressor which concerns on Embodiment 1. FIG. FIG. 5 is a schematic cross-sectional view showing a structural example 3 of a contact portion between a protruding container and a closed container of the closed compressor according to the first embodiment. It is a flow chart which shows the manufacturing process of the closed type compressor which concerns on Embodiment 1. FIG. It is sectional drawing of the modified example of the protruding container of the closed type compressor which concerns on Embodiment 1. FIG. It is a schematic vertical sectional view of the closed type compressor which concerns on Embodiment 2. FIG. It is a figure which shows the refrigerant circuit of the refrigerating cycle apparatus which concerns on Embodiment 3.

Hereinafter, the closed type compressor 100 and the closed type compressor 110 according to the embodiment will be described with reference to 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 indicating directions, such as "top", "bottom", "front", and "back", are appropriately used for ease of understanding, but these notations are described as such for convenience of explanation. It does not limit the arrangement and orientation of the device or component.

Embodiment 1.
[Sealed compressor 100]
FIG. 1 is a schematic vertical sectional view of the sealed compressor according to the first embodiment. FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG. However, FIG. 2 shows the AA line cross section rotated 90 degrees counterclockwise.
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, an electric mechanism portion 20 housed inside the closed container 10, and a compression mechanism portion 30. 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 that accommodates a spring 36 that urges a vane 35, which will be described later, and forms a closed space 50e that communicates with the closed container 10.

(Sealed container 10)
The closed container 10 constitutes the outer shell of the closed compressor 100, and is made of an iron member. The closed container 10 includes 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 into the opening above the middle container 10a, and the lower container 10c is fitted into the opening below the middle container 10a to maintain the closed state. The closed container 10 is arranged on the pedestal 14, and the lower container 10c is fixed to the pedestal 14. The sealed compressor 100 is installed with the pedestal 14 fixed at the installation location by bolts or the like.

A suction pipe 11 to which the accumulator 13 is attached is connected to the central container 10a. A discharge pipe 12 is connected to the upper container 10b. The suction pipe 11 is a connecting pipe for sending the low-temperature low-pressure gas refrigerant sucked through the accumulator 13 into the compression mechanism unit 30. The discharge pipe 12 is a connecting pipe for discharging the high-temperature and high-pressure gas refrigerant in the closed container 10 compressed by the compression mechanism unit 30 to the outside of the closed container 10.

(Electric mechanism unit 20)
The electric mechanism unit 20 rotates the rotating shaft 32 inside the closed container 10. The electric mechanism unit 20 is arranged above the compression mechanism unit 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 central container 10a of the closed container 10 by various fixing methods such as shrink fitting or welding. A rotating shaft 32 is fixed to the center of the rotor 22. The rotating shaft 32 extends downward from the electric mechanism portion 20. The stator 21 rotates the rotor 22 by electric power supplied from the outside of the closed compressor 100.

(Compression mechanism 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 unit 30 includes two compression mechanisms arranged in the axial direction of the rotating shaft 32, an upper bearing 38, a lower bearing 39, and a partition plate 37. Each compression mechanism includes a hollow cylinder 31, a rolling piston 33, a vane 35, a spring 36, and a tubular spring guide 40 in which the spring 36 is housed. The two spring guides 40 are arranged in the protruding container 50. The protruding container 50 is provided in the closed container 10 so as to project from the closed container 10 in the radial direction of the cylinder 31 to the opposite side of the cylinder 31. Hereinafter, the cylinder 31 of the upper compression mechanism is referred to as an upper cylinder 31A, and the cylinder 31 of the lower compression mechanism is referred to as a lower cylinder 31B.

In the closed container 10, the upper cylinder 31A is arranged above the 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 end surface of the upper cylinder 31A is closed by the upper bearing 38. 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 end surface of the lower cylinder 31B is closed by the lower bearing 39. 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.

Each of the upper cylinder 31A and the lower cylinder 31B is formed with suction holes 34 and discharge holes 34B on both sides of the vane groove 31e in the circumferential direction, as shown in FIG. 2 to be described later. A suction pipe 11A is connected to the suction hole 34 of the upper cylinder 31A. 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 31b of the cylinder 31 toward the outer side in the radial direction, and communicates with the space inside the closed container 10 through a discharge hole (not shown) formed in the upper bearing 38. There is.

The rotating shaft 32 has an eccentric portion 32a eccentric in one direction in the 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 rotating shaft 32 is rotatably supported by the upper bearing 38 and the lower bearing 39, and rotates together with the rotor 22.

The spring guide 40 is provided so as to project outward from the closed container 10, and the spring 36 is housed and fixed inside. The spring guide 40 is provided corresponding to each of the upper cylinder 31A and the lower cylinder 31B, and each of them is housed in the projecting container 50 together.

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, the spring 36, and the spring guide 40 in the upper cylinder 31A, and the relationship between the rolling piston 33, the vane 35, the spring 36, and the spring guide 40 in the lower cylinder 31B. Is the same as. Therefore, in the following description, the upper cylinder 31A and the lower cylinder 31B will not be described separately, but will be described using a 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 is formed to be hollow. The cylinder 31 has a cylinder chamber 31d concentric with the rotating shaft 32 inside. A rolling piston 33 is arranged in the cylinder chamber 31d. The inner peripheral wall 31b of the cylinder 31 faces the outer peripheral wall 33a of the rolling piston 33 formed in a cylindrical shape.

The rolling piston 33 is formed in a cylindrical shape. The rolling piston 33 is located at an eccentric position with respect to the central axis C of the rotating shaft 32. The rolling piston 33 is mounted on the eccentric portion 32a of the rotating shaft 32 in the cylinder chamber 31d so as to rotate together with the rotating shaft 32. The rolling piston 33 eccentrically rotates along the inner peripheral wall 31b of the cylinder 31 due to the rotation of the rotating shaft 32.

The cylinder 31 is formed with a vane groove 31e that communicates with the cylinder chamber 31d and extends in the radial direction. In the vane groove 31e, the vane 35 is arranged so as to be able to advance and retreat in the cylinder radial direction. A vane 35 is slidably arranged in the vane groove 31e. An insertion hole 31g communicating with the vane groove 31e is formed on the outer side of the vane groove 31e in the cylinder radial direction. The insertion hole 31g is formed so as to extend from the vane groove 31e to the outer peripheral wall 31f of the cylinder 31.

A spring 36 is inserted into the insertion hole 31g from the outer peripheral wall 31f side and arranged. The spring 36 urges the vane 35 arranged in the vane groove 31e to the arrangement side of the rolling piston 33, and brings the tip portion 35a of the vane 35 into contact with the rolling piston 33. The vane 35 is pressed inward in the radial direction of the cylinder by the urging force of the spring 36, so that the tip portion 35a of the vane 35 is always in contact with the rolling piston 33. When the tip portion 35a of the vane 35 comes into contact with the rolling piston 33, the inside of 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. The vane 35 reciprocates in the vane groove 31e with the tip portion 35a in contact with the outer peripheral wall 33a of the rolling piston 33 as the rolling piston 33 in the cylinder chamber 31d rotates eccentrically.

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 31b 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 to the inner peripheral wall 31b side of the cylinder 31. The insertion hole 31g is formed between the outer peripheral wall 31f of the cylinder 31 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 rotating shaft 32 extending perpendicularly to the paper surface.

The spring 36 is arranged in the spring guide 40. The spring 36 is arranged along a direction orthogonal to the central axis C of the cylinder 31. In the spring 36, one end 36a in the length direction is attached to the back end 35b of the vane 35, and the other end 36b is fixed to the bottom lid 40c described later of the spring guide 40. That is, the spring 36 is arranged between the rear end portion 35b of the vane 35 and the bottom lid portion 40c of the spring guide 40.

The spring 36 is a compression coil spring that compresses and utilizes the 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.

Further, the spring 36 may have the same coil outer diameter or different coil outer diameters in the length direction. As a configuration in which the coil outer diameter of the spring 36 is different, for example, a configuration in which the diameter of the other end portion 36b of the spring 36 is formed to be larger than that of the other portions can be considered. When the spring 36 has a large-diameter portion and a small-diameter portion in this way, the spring 36 may be fixed in the spring guide 40 at the large-diameter portion. For example, the spring 36 may be fixed in the spring guide 40 by providing a circumferential groove on the inner peripheral surface of the spring guide 40 and fitting a large diameter portion into the groove. In this way, when the spring 36 is fixed in the spring guide 40 with a large diameter portion, the bottom lid portion 40c for holding the spring 36 in the spring guide 40 becomes unnecessary. Therefore, the bottom lid portion 40c may be omitted.

The spring guide 40 is a tubular member, and one end 40a is inserted into and fixed to an insertion hole 31g provided in the cylinder 31, and the other end 40b is a through hole provided in the closed container 10. It projects to the outside of the closed container 10 through 10d. The other end 40b of the spring guide 40 is closed by the bottom lid 40c.

The spring guide 40 defines the expansion / contraction direction of the spring 36 and guides the expansion / contraction operation. Further, 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. Therefore, it is desirable that the distance between the inner wall of the spring guide 40 and the coil outer mold of the spring 36 is small. Therefore, the spring guide 40 has an inner wall along the outer diameter of the coil of the spring 36. For example, if the spring 36 is a cylindrical coil spring, the spring guide 40 has an inner wall having a circular cross-sectional shape, and if the spring 36 is an elliptical coil spring, the spring guide 40 has an inner wall having an elliptical cross-sectional shape.

The protruding container 50 has a tubular tubular portion 51 having both ends open and a protruding container lid 52. One end 50a of the tubular portion 51 is joined to a through hole 10d formed in the central container 10a of the closed container 10, and the tubular portion 51 communicates with the inside of the closed container 10. The other end 50b of the tubular portion 51 is closed by a protruding container lid 52. In this way, the protruding container 50 communicates with the inside of the closed container 10, and the other end 50b of the tubular portion 51 is closed by the protruding container lid 52 to form a closed space 50e. The spring guide 40 is accommodated in the closed space 50e. In the following, the end portion of the protruding container 50 on the joint side with the closed container 10 will be referred to as one end portion 50a using a reference numeral attached to the tubular portion 51.

By the way, in the conventional closed type compressor, the spring is directly arranged in the protruding container provided so as to project from the closed container in the radial direction of the cylinder to the opposite side of the cylinder. The protruding container is joined to the closed container, and more specifically, the protruding container is joined to the closed container along the direction orthogonal to the central axis of the closed container. Since the protruding container is joined to the closed container in this way, if the assembly accuracy between the closed container and the cylinder is poor, the positional relationship between the protruding container joined to the closed container and the cylinder deviates from the normal positional relationship.

Ideally, the cylinder 31 is fixed in the closed container 10 so that the central axis of the cylinder 31 coincides with the central axis of the closed container 10. Ideally, the spring 36 is arranged along the direction orthogonal to the central axis of the cylinder 31. However, if the assembly accuracy is poor, such as when the central axis of the cylinder 31 is tilted so as not to coincide with the central axis of the closed container 10, the protruding container 50 is tilted with respect to the direction orthogonal to the central axis of the cylinder 31. It becomes a state. Therefore, if the structure is such that the spring 36 is directly arranged in the projecting container 50, the spring 36 also tilts from the direction orthogonal to the central axis of the cylinder 31. Then, the positional relationship between the spring 36 and the vane 35 deviates from the normal positional relationship. If the positional relationship between the spring 36 and the vane 35 is deviated, for example, when the spring 36 expands and contracts, the spring 36 may be twisted, and the spring 36 may not expand and contract as designed.

On the other hand, in the first embodiment, a spring guide 40 is separately provided in the projecting container 50, and the spring 36 is arranged in the spring guide 40. Then, the spring guide 40 is directly fixed to the cylinder 31. That is, the spring 36 is installed with reference to the cylinder 31. Therefore, even if the central axis of the cylinder 31 is tilted with respect to the central axis of the closed container 10 at the time of manufacturing, the spring 36 is not affected by the tilt and is orthogonal to the central axis of the cylinder 31. Can be installed with high accuracy. Therefore, the positional accuracy of the spring 36 and the vane 35 can be ensured. As a result, it is possible to suppress a situation in which the spring 36 is twisted when the spring 36 expands and contracts, and the spring 36 can be operated stably.

Next, the structure for fixing the spring guide 40 to the cylinder 31 will be described.
One end 40a of the spring guide 40 is press-fitted into the outer peripheral side insertion hole 31g2 of the insertion hole 31g formed in the outer peripheral wall 31f of the cylinder 31 by using a seal tube 31h described later and fixed to the cylinder 31. There is. The seal tube 31h is a cylindrical tube. The spring guide 40 and the seal pipe 31h have the following dimensional relationship in the state before press fitting. That is, the outer diameter of the spring guide 40 is smaller than the inner diameter of the seal tube 31h. The outer diameter of the seal tube 31h is larger than the inner diameter of the outer peripheral side insertion hole 31g2. Then, the seal tube 31h is press-fitted between the outer peripheral surface of one end 40a of the spring guide 40 inserted into the outer peripheral side insertion hole 31g2 and the inner peripheral surface of the outer peripheral side insertion hole 31g2, and the spring guide 40 is pressed. Is press-fitted and fixed to the cylinder 31.

When the spring guide 40 is fixed to the cylinder 31, the inside 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. The inner diameter of the spring guide 40 and the inner diameter of the inner peripheral side insertion hole 31g1 are the same, and the spring guide 40 is a cylinder so that the central axis of the spring guide 40 and the central axis of the inner peripheral side insertion hole 31g1 coincide with each other. It is fixed to 31.

When fixing the spring 36 to the cylinder 31, if a plurality of parts are used, it becomes difficult to secure the positional accuracy between the spring 36 and the vane 35 as the number of parts increases. On the other hand, in the first embodiment, since the only component required for fixing the spring 36 to the cylinder 31 is the spring guide 40, the positional accuracy between the spring 36 and the vane 35 can be ensured.

Next, a method of joining one end 50a of the protruding container 50 to the middle container 10a of the closed container 10 will be described.
A through hole 10d is formed in the inner container 10a of the closed container 10, and one end 50a of the projecting container 50 is joined to the through hole 10d. Since the contact portion between one end 50a of the protruding container 50 and the middle container 10a of the closed container 10 is a curved surface, a gap is likely to occur, and defects such as blow holes occur in the joining method by brazing or fusion welding. Easy to do. Therefore, resistance welding is desirable for the method of joining one end 50a of the protruding container 50 to the middle container 10a of the closed container 10. Resistance welding is a welding method that enables efficient welding in a short time, and is characterized in that it is not easily affected by heat because it is welded in a short time. When resistance welding is used, the protruding container 50 is made of an iron member like the closed container 10.

When one end 50a of the protruding container 50 is resistance welded to the middle container 10a of the closed container 10, the contact width between the one end 50a of the protruding container 50 and the middle container 10a of the closed container 10 should be reduced. Is desirable. When this contact width is small, the electric resistance increases, the joint temperature tends to rise even at a low current, and the joint becomes easy. Therefore, in the first embodiment, one end 50a of the protruding container 50 adopts the structure shown in FIG. 3 or 4 below as a structure for reducing the contact width with the middle container 10a of the closed container 10. ..

FIG. 3 is a schematic cross-sectional view showing a structural example 1 of a contact portion between a protruding container and a closed container of the closed compressor according to the first embodiment.
As shown in FIG. 3, one end 50a of the protruding container 50 has a tapered shape as the wall thickness decreases toward the closed container 10.

FIG. 4 is a schematic cross-sectional view showing a structural example 2 of a contact portion between the protruding container and the closed container of the closed compressor according to the first embodiment.
As shown in FIG. 4, one end 50a of the protruding container 50 has a part of the end surface 50aa located inside the through hole 10d of the closed container 10 when viewed in the direction of the axis 53 of the protruding container 50. .. As a result, the end surface 50aa of one end 50a of the tubular portion 51 of the protruding container 50 does not come into full contact with the closed container 10.

With the above configuration, the contact width between one end 50a of the protruding container 50 and the middle container 10a of the closed container 10 can be reduced, and joining by resistance welding becomes easy.

Further, the joining of one end 50a of the protruding container 50 and the closed container 10 can be performed by brazing or fusion welding in addition to resistance welding. The following FIG. 5 shows an example of the structure of the contact portion between the projecting container 50 and the closed container 10 when joining by brazing or fusion welding.

FIG. 5 is a schematic cross-sectional view showing a structural example 3 of a contact portion between the protruding container and the closed container of the closed compressor according to the first embodiment.
As shown in FIG. 5, the inner container 10a of the closed container 10 projects around the through hole 10d to which the protruding container 50 is joined with respect to the closed container 10 in the radial direction of the cylinder 31 on the opposite side of the cylinder 31. Has a curved collar 10e. The projecting container 50 is joined by brazing or fusion welding with one end 50a of the tubular portion 51 inserted inside the collar 10e. That is, one end 50a of the tubular portion 51 is joined to the inner peripheral surface 10ea of the collar 10e by brazing or fusion welding. Although not shown, one end 50a of the tubular portion 51 may be expanded outward, and the expanded portion may be joined to the inner wall surface 10aa of the closed container 10. Further, one end 50a of the tubular portion 51 may be joined to both the inner peripheral surface 10ea of the collar 10e and the inner wall surface 10aa of the closed container 10.

By providing the collar 10e around the through hole 10d to which the projecting container 50 is joined in this way, it is possible to secure the contact distance between one end 50a of the tubular portion 51 and the collar 10e. .. Therefore, even if a joining method by brazing or fusion welding is used, defects such as blow holes are less likely to occur, and good joining can be performed.

[Manufacturing method of sealed compressor 100]
Next, a method of manufacturing the main part of the sealed compressor will be described.

FIG. 6 is a flow chart showing a manufacturing process of the sealed compressor according to the first embodiment. It is desirable that the protruding container 50 is attached to the closed container 10 in the following order. To attach the protruding container 50 to the closed container 10, first, a joining step of joining one end 50a of the tubular portion 51 of the protruding container 50 to the central container 10a of the closed container 10 is performed (step S1). In the joining step (step S1), the above-mentioned resistance welding is used.

Next, a cylinder fixing step of fixing the cylinder 31 in the central container 10a of the closed container 10 is performed (step S2). The sealed compressor 100 of FIG. 1 has a plurality of compression mechanisms. Therefore, in the cylinder fixing step, an integral body in which the upper bearing 38, the two cylinders 31, the partition plate 37, the lower bearing 39, and the rotating shaft 32 having the two rolling pistons 33 are combined is sealed. It is inserted into the container 10 and the two cylinders 31 are fixed to the inner peripheral surface of the middle container 10a. Each cylinder 31 is fixed to the central container 10a at a position where the insertion hole 31g faces the through hole 10d of the closed container 10.

Next, a vane placement step of arranging the vane 35 from the other end 50b of the tubular portion 51 of the projecting container 50 to the vane groove 31e of the cylinder 31 is performed (step S3). Next, a spring guide fixing step of inserting the spring guide 40 from the other end 50b of the tubular portion 51 and fixing it to the cylinder 31 is performed (step S4). Next, the spring 36 is inserted into the spring guide 40, one end of the spring 36 on the tip end side in the insertion direction is attached to the back surface side end portion 35b of the vane 35, and the other end portion 36b is fixed to the bottom lid portion 40c of the spring guide 40. Perform the spring mounting process (step S5). Finally, a closing step is performed in which the protruding container lid 52 is joined to the other end 50b of the tubular portion 51 to seal the inside of the tubular portion 51 (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, and the inside of the protruding container 50 can be sealed.

In the above manufacturing method, since the protruding container 50 is joined to the closed container 10 at the first stage, thermal distortion of the spring guide 40 and the spring 36 can be prevented. That is, when the step of joining the protruding container 50 to the closed container 10 is performed after incorporating the spring guide 40 and the spring 36 into the closed container 10, the heat at the time of joining may be transferred to the spring guide 40 and the spring 36. is there. However, in the first embodiment, the spring guide 40 and the spring 36 are thermally distorted by performing the step of joining the protruding container 50 to the closed container 10 before incorporating the spring guide 40 and the spring 36 into the closed container 10. Can be prevented.

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 or fusion welding. Alternatively, in the closing step (step S6), for example, by making the protruding container lid 52 a copper member or a copper-plated iron member, the tubular portion 51 and the protruding container lid 52 may be joined by brazing. it can. Brazing is performed by a low heat input joining method such as high frequency brazing.

FIG. 7 is a schematic cross-sectional view of a modified example of the protruding container of the closed compressor according to the first embodiment.
The tubular portion 51 may be composed of one component as shown in FIGS. 1 to 5, or as shown in FIG. 7, for example, with the front tubular portion 51a divided in the axial 53 direction at the central portion. It may be composed of two parts with a rear tubular portion 51b. The front tubular portion 51a and the rear tubular portion 51b are tubular members that accommodate the spring guide 40 inside.

One end 51a of the front tubular portion 51a is joined to the middle container 10a of the closed container 10, and one end 51ba of the rear tubular portion 51b is joined to the other end 51ab. There is. The front tubular portion 51a becomes thinner toward one end portion 51a and is formed in a tapered shape. In the rear tubular portion 51b, one end 51ba is joined to the other end 51ab of the front tubular portion 51a, and the protruding container lid 52 is joined to the other end 51bb. The protruding container 50 of the modified example is sealed by closing the other end portion 51bb of the rear tubular portion 51b with the protruding container lid 52.

When the tubular portion 51 is divided in this way, the front tubular portion 51a and the rear tubular portion 51b can be made of different materials. Further, by using the following manufacturing method, it is possible to improve workability.

The flow of attaching the protruding container 50 to the closed container 10 shown in FIG. 7 is the same as that in FIG. Since the tubular portion 51 is divided into a front tubular portion 51a and a rear tubular portion 51b, in the joining step (step S1), the front tubular portion 51a and the closed container 10 are first joined. By making the front tubular portion 51a an iron member like the closed container 10, the front tubular portion 51a of the protruding container 50 and the closed container 10 can be joined by resistance welding. Here, since the tubular portion 51 is divided into two and only the front tubular portion 51a is joined to the middle container 10a of the closed container 10, the length in the shaft 53 direction is longer than that in the undivided configuration. Is shortened, and the operator can easily perform the joining work.

Then, the cylinder fixing step (step S2), the spring guide fixing step (step S4), and the spring mounting step (step S5) are performed. Also in each of these steps, the length in the axis 53 direction is shorter than that in the configuration in which the tubular portion 51 is not divided, so that the operator can easily perform the work. Then, the rear tubular portion 51b is joined to the front tubular portion 51a, and subsequently, the closing step (step S6) is performed.

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. it can. Examples of the brazing method for joining the rear tubular portion 51b and the protruding container lid 52 include high-frequency brazing, gas brazing, and the like. 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 or fusion welding. When 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 subjected to copper plating treatment, the rear tubular portion 51b and the protruding container lid 52 are used. The strength of the projecting container 50 can be increased as compared with the case where both of the members are made of copper.

Further, here, the front tubular portion 51a of the protruding container 50 is joined to the closed container 10, and after the spring mounting step (step S5) is completed, the rear tubular portion 51b is joined to the front tubular portion 51a. The next process order may be used. That is, the front tubular portion 51a may be joined to the rear tubular portion 51b to form the tubular portion 51, and then the front tubular portion 51a may be joined to the closed container 10. When the front tubular portion 51a is made of an iron member and the rear tubular portion 51b is made of a copper member, for example, the front tubular portion 51a and the rear tubular portion 51b are joined by brazing in a furnace or the like to join the tubular portion 51. Can be configured.

[Operation of closed compressor 100]
Next, the operation of the closed 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 in the cylinder chamber 31d, and the vane 35 in which the tip portion 35a abuts on the rolling piston 33 reciprocates due to the rotation of the rolling piston 33. At this time, the gas refrigerant enters the cylinder chamber 31d from the suction hole 34 of the compression mechanism unit 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 this compression step, 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 moves forward and backward in the vane groove 31e 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 compressor 100 of the first embodiment eccentrically rotates along the closed container 10, the hollow cylinder 31 housed in the closed container 10, and the inner peripheral wall 31b of the cylinder 31. A rolling piston 33, a vane 35 that reciprocates in the vane groove 31e provided in the cylinder 31 in the radial direction of the cylinder 31, and a spring 36 that urges the vane 35 to the arrangement side of the rolling piston 33 are provided. The closed compressor 100 further
In the radial direction of the cylinder 31, it is provided so as to project from the closed container 10 on the side opposite to the cylinder 31, and one end 40a is joined to the closed container 10 to communicate with the inside of the closed container 10 to form a closed space 50e. A protruding container 50 to be formed and a spring guide 40 arranged in the closed space 50e of the protruding container 50 and to which the spring 36 is fixed inside are provided. An insertion hole 31g is formed in the outer peripheral wall 31f of the cylinder 31, and one end 40a of the spring guide 40 is inserted into the insertion hole 31g of the cylinder 31 and fixed.

In this way, a spring guide 40 is separately provided in the projecting container 50, and the spring guide 40 is directly fixed to the cylinder 31. As a result, the positional accuracy of the spring 36 and the vane 35 can be ensured as compared with the configuration in which the spring 36 is housed in the protruding container 50 joined to the closed container 10. Further, since the structure is such that the spring guide 40 is directly fixed to the cylinder 31, the only component for incorporating the spring 36 into the cylinder 31 is the spring guide 40. From this point as well, the positional accuracy of the spring 36 and the vane 35 can be ensured. Further, since the spring 36 is housed in the projecting container 50, the space for arranging the spring 36 is expanded by the amount of the projecting container 50, and the expansion / contraction allowance of the spring 36 can be secured as compared with the configuration in which the projecting container 50 is not provided.

The sealed compressor 100 of the first embodiment has a plurality of cylinders 31, and a plurality of spring guides 40 are fixed to the plurality of cylinders 31, and the projecting container 50 has a plurality of spring guides 40. Contain all together.

In this way, by configuring the projecting container 50 to house the plurality of spring guides 40 together, the closed compressor is compared with the configuration in which each of the plurality of spring guides 40 is housed in the separate projecting containers 50. The manufacturing process of 100 can be simplified. That is, if each of the plurality of spring guides 40 is housed in separate projecting containers 50, a joining step (step S1) of joining the projecting containers 50 to the closed container 10 is required for each spring guide 40. On the other hand, if the projecting container 50 is configured to house a plurality of spring guides 40 together, the joining step (step S1) can be performed only once.

One end 50a of the protruding container 50 becomes thinner toward the closed container 10 and is formed in a tapered shape. Alternatively, the closed container 10 has a through hole 10d to which one end 50a of the protruding container 50 is joined, and the end surface 50aa of the one end 50a of the protruding container 50 is viewed in the axial direction of the protruding container 50. , A part of it is located inside the through hole 10d of the closed container 10 and does not come into full contact with the closed container 10.

As a result, the contact width when joining one end 50a of the protruding container 50 and the closed container 10 can be reduced, and the joining by resistance welding becomes easy.

The closed container 10 is a collar in which the circumference of the through hole 10d to which one end 50a of the protruding container 50 is joined is curved so as to project from the closed container 10 to the opposite side of the cylinder 31 in the radial direction of the cylinder 31. Having 10e, the protruding container 50 is joined to one or both of the inner peripheral surface 10ea of the collar 10e and the inner wall surface 10aa of the closed container 10.

As a result, the contact distance between one end 50a of the projecting container 50 and the collar 10e can be secured, and the joining by brazing or fusion welding can be performed satisfactorily.

The protruding container 50 is formed in a tubular shape, and has a tubular portion 51 to which one end 50a is joined to the closed container 10 and a protruding container lid 52 that closes the other end 50b of the tubular portion 51. Have.

As described above, the projecting container 50 is composed of the tubular portion 51 and the projecting container lid 52 that closes the other end portion 50b of the tubular portion 51, so that the closed space 50e can be formed.

The tubular portion 51 of the protruding container 50 is composed of two parts divided in the axial direction of the tubular portion 51.

By having the structure in which the tubular portion 51 is divided in this way, the length in the axis 53 direction is shortened. Therefore, in each of the joining step (step S1), the cylinder fixing step (step S2), the spring guide fixing step (step S4), and the spring mounting step (step S5) at the time of manufacturing, the operator can easily work. ..

Further, the manufacturing method of the closed type compressor 100 includes a joining step of joining one end 50a of the tubular portion 51 to the through hole 10d of the closed container 10 so as to protrude from the closed container 10, and a rolling piston 33. It has a cylinder fixing step of fixing the hollow cylinder 31 in which the is housed in the closed container 10. The method for manufacturing the closed compressor 100 further includes a vane placement step of arranging the vane 35 in the vane groove 31e formed in the cylinder 31, and inserting the tubular spring guide 40 from the other end 50b of the tubular portion 51. It has a spring guide fixing step of fixing to the cylinder 31. Further, in the method of manufacturing the closed compressor 100, a spring 36 that urges the vane 35 on the arrangement side of the rolling piston 33 is inserted into the spring guide 40, one end portion 36a of the spring 36 is brought into contact with the vane 35, and the other end. It has a spring mounting step of fixing the portion 36b to the spring guide 40, and a closing step of joining the protruding container lid 52 to the other end portion 50b of the tubular portion 51 to seal the inside of the tubular portion 51.

In this way, by joining the protruding container 50 to the closed container 10 before incorporating the spring guide 40 and the spring 36 into the closed container 10, thermal distortion of the spring guide 40 and the spring 36 is prevented, and the protruding container is prevented. The inside of 50 can be sealed.

Further, in the manufacturing method of the closed type compressor 100, in the closing step (step S6), the tubular portion 51 and the protruding container lid 52 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. Alternatively, in the closing step (step S6), the tubular portion 51 and the protruding container lid 52 are joined by fusion welding.

By joining the tubular portion 51 and the projecting container lid 52 by a low heat input joining method in this way, 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. ..

Embodiment 2.
[Sealed compressor 110]
FIG. 8 is a schematic vertical sectional view of the sealed compressor according to the second embodiment. Parts having the same configuration as the closed compressor 100 of FIGS. 1 to 7 are designated by the same reference numerals. 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, and the same functions and configurations are described by using the same reference numerals. To do.

In the closed compressor 100 according to the first embodiment, the number of protruding containers 50 was always one regardless of the number of cylinders 31 arranged in the closed container 10. On the other hand, in the closed compressor 110 according to the second embodiment, the number of protruding containers 50 changes according to the number of cylinders 31 arranged in the closed container 10. That is, the closed compressor 110 has the same number of protruding containers 50 as the number of cylinders 31.

Then, each protruding container 50 houses one spring guide 40. For example, as shown in FIG. 8, the closed compressor 110 according to the second embodiment has two cylinders 31 arranged in the closed container 10. In this case, the number of protruding containers 50 joined to the central container 10a is also two. A spring guide 40 fixed to the upper cylinder 31A is housed in one of the two protruding containers 50, and a spring fixed to the lower cylinder 31B is housed in the other protruding container 50. The guide 40 is housed.

Two through holes 10d1 and 10d2 are formed in the inner container 10a of the closed container 10 corresponding to the two spring guides 40. Each one end 40a of each spring guide 40 is press-fitted and fixed to the outer peripheral side insertion hole 31g2 of the insertion hole 31g of the cylinder 31 through the through holes 10d1 and 10d2 as in the first embodiment. Further, each protruding container 50 is joined to the through holes 10d1 and 10d2 of the inner container 10a of the closed container 10 by resistance welding, brazing, fusion welding or the like in the same manner as in the first embodiment to form a closed space 50e. doing.

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. 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.

Thereby, for example, even if the fixed positions of the plurality of spring guides 40 with the cylinders 31 are different in the circumferential direction, the sealed space 50e can be formed for each spring guide 40.

The embodiment of the present invention is not limited to the above-described first to second embodiments, and various modifications can be made as follows.

For example, in the above, the sealed compressor 100 is a twin rotary compressor having two cylinders 31, but it may be a single rotary compressor having one cylinder 31.

Further, the cross-sectional shape of the insertion hole 31g formed in the cylinder 31 is not limited to a circular shape, and may be formed into, for example, an insertion shape, an oval shape, or a polygonal shape. When the cross-sectional shape of the insertion hole 31g is an insertion shape, an oval shape, or a polygonal shape, the cross-sectional shape of the spring guide 40 is formed into an elliptical shape, an oval shape, or a polygonal shape according to the cross-sectional shape of the insertion hole 31g. ..

Embodiment 3.
FIG. 9 is a diagram showing a refrigerant circuit of the refrigeration cycle device according to the third embodiment.
The refrigeration cycle device 60 includes a closed compressor 61, a condenser 62, an expansion valve 63 as a decompression device, and an evaporator 64. The closed compressor 61 is composed of the closed compressor 100 of the first embodiment or the closed compressor 110 of the second embodiment. The gas refrigerant discharged from the closed compressor 61 flows into the condenser 62, exchanges heat with the air passing through the condenser 62, and flows out as a high-pressure liquid refrigerant. The high-pressure liquid refrigerant flowing out of the condenser 62 is depressurized by the expansion valve 63 to become a low-pressure gas-liquid two-phase refrigerant, which flows into the evaporator 64. The low-pressure gas-liquid two-phase refrigerant flowing into the evaporator 64 exchanges heat with the air passing through the evaporator 64 to become a low-pressure gas refrigerant, which is again sucked into the closed compressor 61.

The refrigeration cycle apparatus 60 configured in this way includes, as the closed compressor 61, the closed compressor 100 of the first embodiment or the closed compressor 110 of the second embodiment, thereby providing a stable vane 35 and a stable vane 35. The operation of the spring 36 can be obtained. This makes it possible to configure a highly reliable refrigeration cycle device 60.

The refrigerating cycle device 60 can be applied to an air conditioner, a refrigerator, a refrigerator, or the like.

10 closed container, 10a middle container, 10aa inner wall surface, 10b upper container, 10c lower container, 10d through hole, 10d1 through hole, 10d2 through hole, 10e collar, 10ea inner peripheral surface, 11 suction tube, 11A suction tube, 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 inner wall, 31d cylinder chamber, 31d1 Suction chamber, 31d2 compression chamber, 31e vane groove, 31f outer wall, 31g insertion hole, 31g1 inner peripheral side insertion hole, 31g2 outer peripheral side insertion hole, 31h seal tube, 32 rotation shaft, 32a eccentric part, 33 rolling piston, 33a outer circumference Wall, 34 suction hole, 34B discharge hole, 35 vane, 35a tip, 35b back side end, 36 spring, 36a one end, 36b other end, 37 partition plate, 38 upper bearing, 39 lower bearing, 40 spring guide , 40a one end, 40b the other end, 40c bottom lid, 50 protruding container, 50a one end, 50aa end face, 50b the other end, 50e sealed space, 51 tubular part, 51a front tubular Part, 51aa one end, 51ab the other end, 51b rear tubular part, 51ba one end, 51bb the other end, 52 protruding container lid, 53 shaft, 60 refrigeration cycle device, 61 sealed compressor , 62 Condenser, 63 Expansion valve, 64 Evaporator, 100 Sealed compressor, 110 Sealed compressor, C central axis.

Claims (13)

1. With a closed container
   A 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 reciprocates in the radial direction of the cylinder in the vane groove provided in the cylinder, and
   A spring that urges the vane to the placement side of the rolling piston,
   It is provided so as to project from the closed container on the side opposite to the cylinder in the radial direction of the cylinder, and one end thereof is joined to the closed container to communicate with the inside of the closed container to form a closed space. With a protruding container,
   A spring guide, which is arranged in the closed space of the protruding container and in which the spring is fixed, is provided.
   An insertion hole is formed in the outer peripheral wall of the cylinder.
   The spring guide is a closed compressor in which one end thereof is inserted and fixed in the insertion hole of the cylinder.
2. Has multiple cylinders
   A plurality of the spring guides are fixed to the plurality of the cylinders.
   The closed compressor according to claim 1, wherein the protruding container collectively accommodates a plurality of the spring guides.
3. Has multiple cylinders
   A plurality of the spring guides are fixed to the plurality of the cylinders.
   Having a plurality of said projectiles as many as the number of the plurality of cylinders
   The closed compressor according to claim 1, wherein each of the plurality of protruding containers houses one spring guide.
4. The closed compressor according to any one of claims 1 to 3, wherein the one end of the protruding container becomes thinner toward the closed container and is formed in a tapered shape.
5. The closed container has a through hole to which the one end of the protruding container is joined.
   A part of the end surface of the one end of the protruding container is located inside the through hole of the closed container when viewed in the axial direction of the protruding container, and does not come into full contact with the closed container. The sealed compressor according to any one of claims 3.
6. The closed container has a collar in which the circumference of the through hole to which the one end of the protruding container is joined is curved so as to project from the closed container to the opposite side of the cylinder in the radial direction of the cylinder. Have and
   The closed compressor according to any one of claims 1 to 3, wherein the protruding container is joined to one or both of the inner peripheral surface of the collar and the inner wall surface of the closed container.
7. The protruding container is
   A tubular portion formed in a tubular shape and one end of which is joined to the closed container,
   A protruding container lid that closes the other end of the tubular portion,
   The closed compressor according to any one of claims 1 to 6.
8. The tubular portion of the protruding container is
   The sealed compressor according to claim 7, which is composed of two parts divided in the axial direction of the tubular portion.
9. A refrigeration cycle apparatus provided with the sealed compressor according to any one of claims 1 to 8.
10. A joining step of joining one end of a tubular portion having both ends opened so as to protrude from the closed container into the through hole of the closed container.
    A cylinder fixing process for fixing a hollow cylinder in which a rolling piston is housed in the closed container,
    A vane placement step of arranging vanes in the vane groove formed in the cylinder, and
    A spring guide fixing step of inserting a tubular spring guide from the other end of the tubular portion and fixing it to the cylinder,
    A spring mounting step of inserting a spring that urges the vane to the arrangement side of the rolling piston into the spring guide, bringing one end of the spring into contact with the vane, and fixing the other end to the spring guide.
    A closing step of joining a protruding container lid to the other end of the tubular portion to seal the inside of the tubular portion.
    A method for manufacturing a closed compressor having.
11. In the closing step
    The method for manufacturing a closed compressor according to claim 10, wherein the tubular portion and the protruding container lid are joined by resistance welding.
12. In the closing step
    The method for manufacturing a closed compressor according to claim 10, wherein the tubular portion and the protruding container lid are joined by brazing.
13. In the closing step
    The method for manufacturing a closed compressor according to claim 10, wherein the tubular portion and the protruding container lid are joined by fusion welding.

Images