WO2019234881A1

WO2019234881A1 - Sealed compressor and manufacturing method for sealed compressor

Info

Publication number: WO2019234881A1
Application number: PCT/JP2018/021831
Authority: WO
Inventors: 夏紀井垣; 康之赤堀
Original assignee: 三菱電機株式会社
Priority date: 2018-06-07
Filing date: 2018-06-07
Publication date: 2019-12-12
Also published as: KR102427373B1; JPWO2019234881A1; CZ309180B6; CN112204260A; KR20210002651A; JP7012843B2; CZ2020626A3; CN112204260B

Abstract

This sealed compressor comprises: a sealed container; a hollow cylinder accommodated in the sealed container; a rolling piston that eccentrically rotates; a vane that divides the space within the cylinder into an intake chamber and a compression chamber; a spring that biases the vane toward the side where the rolling piston is disposed; a cylindrical spring guide that protrudes from the sealed container, forms a hollow portion that accommodates the spring, and defines the extension/compression direction of the spring; and a protruding container that protrudes from the sealed container, forms a sealed space together with the sealed container, and accommodates the spring guide therein. An insertion hole into which the spring is inserted is formed in the cylinder, one end portion of the spring guide is fixed to the cylinder and the hollow portion is in communication with the insertion hole, the other end portion of the spring guide is closed off by a bottom lid portion, and the spring is disposed between the rear-side end portion of the vane, which is positioned at the side opposite to the rolling piston, and the bottom lid portion.

Description

Hermetic compressor and method for manufacturing hermetic compressor

The present invention relates to a hermetic compressor used in a refrigeration cycle such as an air conditioner, a refrigerator, or a refrigerator, and a method for manufacturing the hermetic compressor.

Conventional rotary compressors include a rotary compressor that compresses refrigerant by a combination of a rotating piston and cylinder. In this rotary compressor, a piston is accommodated in a cylinder, and a vane biased by a spring abuts the piston to form a compression chamber in the cylinder. The spring for biasing 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 in which the spring is held by the cylinder, the distance between the back surface of the vane and the sealed 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 contact length of the spring, and the stress generated in the spring becomes large, and the spring may be damaged by fatigue. Thus, in order to reduce the stress generated in the spring, a hermetic compressor has been proposed in which a protruding container is provided in the hermetic container so that the spring mounting interval is increased (for example, Patent Document 1). In recent years, the stroke volume of hermetic compressors has increased, and the expansion / contraction allowance of the spring that slides the vane is limited. Therefore, it is increasingly important to secure the expansion / contraction allowance of the spring that slides the vane. ing.

Japanese Unexamined Patent Publication No. 63-16189

The hermetic compressor of Patent Document 1 has a configuration in which a projecting container protruding from an airtight container is provided, and a spring is disposed in the projecting container. However, in the hermetic compressor of Patent Document 1, if the assembly accuracy between the hermetic container and the cylinder is poor, the positional relationship between the spring and the vane is shifted, and for example, the spring may be twisted when the spring is expanded or contracted. There is a possibility that the spring does not expand and contract as designed.

The present invention solves the above-described problems, and hermetically seals to ensure the accuracy of the positional relationship between the spring and the vane while securing the expansion / contraction allowance of the spring that slides the vane used in the hermetic compressor. A mold compressor and a method for manufacturing a hermetic compressor are obtained.

A hermetic compressor according to the present invention includes a hermetic container, a hollow cylinder accommodated in the hermetic container, a rolling piston that rotates eccentrically along the inner peripheral wall of the cylinder, and an outer peripheral wall of the rolling piston, A vane that divides the inner space into a suction chamber and a compression chamber, a spring that biases the vane toward the arrangement side of the rolling piston, and a hollow portion that protrudes from the sealed container and accommodates the spring, and expands and contracts the spring A cylindrical spring guide that defines the direction, a protruding container that protrudes from the sealed container, forms a sealed space together with the sealed container, and houses the spring guide therein, and a spring is inserted into the cylinder An insertion hole is formed, and the spring guide has one end fixed to the cylinder and the hollow part is connected to the insertion hole. The other end is closed by the bottom lid, and the spring is arranged between the back end of the vane located on the opposite side of the rolling piston and the bottom lid It is.

The hermetic compressor according to the present invention has a cylindrical spring guide that protrudes from the hermetic container, forms a hollow portion that accommodates the spring, and defines the expansion and contraction direction of the spring. In this spring guide, one end 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. . And the spring is arrange | positioned between the back side edge part of the vane located in the opposite side to a rolling piston, and a bottom cover part. Therefore, the hermetic compressor is configured such that the spring is disposed between the rear side end portion of the vane and the bottom cover portion of the spring guide protruding from the sealed container, so that the gap between the rear side end portion of the vane and the sealed container is provided. The expansion / contraction allowance of the spring can be secured as compared with the arrangement of the spring. Further, in the hermetic compressor, by directly fixing the spring guide to the cylinder, the spring holding part with respect to the cylinder becomes only the spring guide, and the positional accuracy between the spring and the vane can be ensured.

It is a longitudinal cross-sectional view of the hermetic type compressor concerning Embodiment 1 of the present invention. FIG. 2 is a schematic cross-sectional view taken along line AA of the upper cylinder in the compression mechanism portion of FIG. 1. It is a flowchart which shows the manufacturing process of the hermetic compressor of FIG. It is a cross-sectional schematic diagram of the modification of the protrusion container shown in FIG. It is a longitudinal cross-sectional view of the hermetic compressor which concerns on Embodiment 2 of this invention.

Hereinafter, the hermetic compressor 100 and the hermetic compressor 110 according to the embodiment of the present invention will be described with reference to the drawings. In the following drawings including FIG. 1, the relative dimensional relationship and shape of each component may be different from actual ones. In the following drawings, the same reference numerals denote the same or corresponding parts, and this is common throughout the entire specification. In addition, in order to facilitate understanding, terms representing directions (for example, “up”, “down”, “right”, “left”, “front”, “back”, etc.) are used as appropriate. For convenience of explanation, it is only described as such, and does not limit the arrangement and orientation of the apparatus or components.

Embodiment 1 FIG.
[Sealed compressor 100]
FIG. 1 is a longitudinal sectional view of a hermetic compressor 100 according to Embodiment 1 of the present invention. The hermetic compressor 100 is one of elements constituting a refrigeration cycle used in, for example, an air conditioner, a refrigerator, a refrigerator, a vending machine, a water heater, and the like. The hermetic compressor 100 is a twin rotary type compressor having two compression chambers. The hermetic compressor 100 includes a hermetic container 10, and an electric mechanism unit 20 and a compression mechanism unit 30 housed in the hermetic container 10. The hermetic compressor 100 has an accumulator 13 outside the hermetic container 10 and a suction pipe 11 that connects the hermetic container 10 and the accumulator 13. Further, the hermetic compressor 100 includes a protruding container 50 that houses a spring 36 that biases a vane 35 described later.

(Sealed container 10)
The hermetic container 10 constitutes an outer shell of the hermetic compressor 100. The hermetic 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 sealed 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, so that the sealed state is maintained. A suction pipe 11 attached with an accumulator 13 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 connection pipe for sending a gas refrigerant (low temperature and low pressure) sucked through the accumulator 13 into the compression mechanism 30. The discharge pipe 12 is a connection pipe for discharging the gas refrigerant (high temperature and high pressure) in the sealed container 10 compressed by the compression mechanism unit 30 to the outside of the sealed container 10. The sealed container 10 is disposed on the pedestal 14, and the lower container 10 c is fixed to the pedestal 14. In the hermetic compressor 100, the pedestal 14 is fixed to the installation location with bolts or the like in a normal installation state.

(Electric mechanism 20)
The electric mechanism unit 20 generates a rotary motion that rotates the rotary shaft 32 inside the sealed container 10. The electric mechanism unit 20 is disposed above the compression mechanism unit 30 in the sealed container 10. The electric mechanism unit 20 includes a stator 21 fixed to the inner peripheral wall of the middle container 10 a and a rotor 22 that is rotatably fitted to the inner peripheral side of the stator 21. The stator 21 is fixed to the middle container 10a of the sealed container 10 by various fixing methods such as shrink fitting and welding. A rotating shaft 32 that extends 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 hermetic compressor 100.

(Compression mechanism 30)
The compression mechanism unit 30 is accommodated in the sealed container 10 and compresses the refrigerant flowing into the sealed container 10. The compression mechanism part 30 is arrange | positioned under the electric mechanism part 20, and is being fixed to the middle container 10a. The compression mechanism unit 30 has a substantially cylindrical cylinder 31. The compression mechanism 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 protruding container 50. It has.

The hermetic compressor 100 has at least one hollow cylinder 31 accommodated in the hermetic container 10 in the compression mechanism unit 30. The hermetic compressor 100 may have a plurality of cylinders 31 as shown in FIG. That is, the compression mechanism unit 30 may be composed of a plurality of cylinders 31 including an upper cylinder 31A and a lower cylinder 31B as shown in FIG. 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 sealed container 10, the substantially cylindrical upper cylinder 31A is disposed above the substantially cylindrical lower cylinder 31B. An upper bearing 38 is disposed on the upper cylinder 31A in contact with the upper end surface of the upper cylinder 31A, and the upper bearing 38 closes the upper end surface of the upper cylinder 31A. Under the lower cylinder 31B, a lower bearing 39 is disposed in contact with the lower end surface 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 disposed 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 line AA of the upper cylinder 31A in the compression mechanism 30 of FIG. However, FIG. 2 shows a cross section taken along line AA rotated 90 degrees counterclockwise. Hereinafter, the configuration of the compression mechanism 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 is the same as the relationship between the rolling piston 33, the vane 35, and the spring 36 in the lower cylinder 31B. 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 that is a generic name of the upper cylinder 31A and the lower cylinder 31B. In FIG. 2, illustration of the eccentric portion 32 a disposed in the cylinder 31 is omitted.

As shown in FIG. 2, the cylinder 31 has a cylindrical peripheral wall portion 31b, and a cylinder chamber 31d concentric with the rotating shaft 32 is formed by the inner peripheral wall 31b1 of the peripheral wall portion 31b. The rolling piston 33 is disposed 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 disposed in the vane groove 31e. The cylinder chamber 31d is divided by a vane 35 into a suction chamber 31d1 that communicates with the suction hole 34 and a compression chamber 31d2 that communicates with the discharge hole 34B. 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 a space surrounded by the inner peripheral wall 31b1 of the cylinder 31.

In the peripheral wall portion 31 b of the cylinder 31, an insertion hole 31 g into which the spring 36 is inserted is formed along the radial direction of the cylinder 31 between the vane groove 31 e and the outer peripheral wall 31 f of the cylinder 31. A spring 36 for urging the vane 35 toward 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, on 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 circumferential insertion hole 31g2 is φD and the diameter of the inner circumferential insertion hole 31g1 is φd, φd is smaller than φD (φd <φD). That is, the insertion hole 31g has a plurality of portions with 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 smaller diameter toward the vane groove 31e. The central axis of the outer circumferential side insertion hole 31g2 and the central axis of the inner circumferential side insertion hole 31g1 are coaxial, and both the central axes intersect with the central axis C of the rotating shaft 32 extending perpendicular to the paper surface.

In the peripheral wall portion 31b of the cylinder 31, a suction hole 34 and a discharge hole 34B are formed on both sides of the vane groove 31e in the circumferential direction. The suction pipe 11A is connected to the suction hole 34 of the upper cylinder 31A, and the suction pipe 11B is connected to the suction hole 34 of the lower cylinder 31B. The above-described suction pipe 11 is a general term for the suction pipe 11A and the suction pipe 11B. The discharge hole 34B is formed radially outward from the inner peripheral wall 31b1 of the cylinder 31, and communicates with the space in the sealed container 10 through a discharge hole (not shown) formed in the upper bearing 38. Yes.

As shown in FIG. 1, the rotary shaft 32 has an eccentric portion 32 a eccentric in one radial direction on one end side in the axial direction. In addition, the other end side of the rotating shaft 32 in the axial direction is inserted and fixed to the central portion of the rotor 22 of the electric mechanism unit 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.

1 and 2, the hermetic compressor 100 includes a rolling piston 33 that rotates eccentrically along the inner peripheral wall 31 b 1 of the cylinder 31 in the compression mechanism 30. The rolling piston 33 is located at an eccentric position 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 together with the rotating shaft 32. The rolling piston 33 rotates eccentrically in the cylinder chamber 31d by the rotation of the rotating shaft 32.

As shown in FIGS. 1 and 2, the hermetic compressor 100 is in contact with the outer peripheral wall 33a of the rolling piston 33 in the compression mechanism 30, and the space in the cylinder 31 is divided into a suction chamber 31d1 and a compression chamber 31d2. The vane 35 is provided. The tip portion 35 a of the vane 35 is brought into contact with the outer peripheral wall 33 a of the rolling piston 33 by the urging force of the spring 36. A 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 hermetic compressor 100 includes a spring 36 that biases the vane 35 toward the arrangement side of the rolling piston 33 in the compression mechanism 30. As shown in FIG. 2, the spring 36 is disposed at a rear side end portion 35 b of the vane 35 located on the opposite side of the rolling piston 33 in the radial direction of the cylinder 31. The spring 36 is housed in a spring guide 40 described later. The spring 36 is slidably disposed in the hollow portion 40 e of the spring guide 40. The spring 36 is a compression coil spring that uses a reaction force by being compressed, and is a cylindrical coil spring. The spring 36 is preferably a cylindrical coil spring, but is not limited to a cylindrical coil spring. Since the spring 36 is guided by the spring guide 40, a spring having the same coil outer diameter in the free length direction of the spring 36 is desirable. Therefore, for example, if the spring guide 40 has an elliptical cross section, an elliptic coil spring may be used as the spring 36. One end 36 b in the free length direction of the spring 36 is fixed to the bottom cover 40 c of the spring guide 40, and the other end 36 a is attached to the rear side end 35 b of the vane 35. In other words, the spring 36 is disposed between the rear side end portion 35 b of the vane 35 located on the opposite side of the rolling piston 33 and the bottom lid portion 40 c of the spring guide 40.

As shown in FIGS. 1 and 2, the hermetic compressor 100 forms a hollow portion 40 e that protrudes from the hermetic container 10 and accommodates the spring 36 in the compression mechanism 30, and defines the expansion and contraction direction of the spring 36. A cylindrical spring guide 40 is provided. The spring guide 40 is a cylindrical member that houses the spring 36 therein. One end 40 a of the spring guide 40 is fixed to the cylinder 31 by being inserted into an insertion hole 31 g formed in the outer peripheral wall 31 f of the cylinder 31. More specifically, one end 40a of the spring guide 40 is fixed to the cylinder 31 by being inserted into the outer peripheral side insertion hole 31g2 of the insertion hole 31g. Spring guides 40 are fixed to the plurality of cylinders 31 of the upper cylinder 31A and the lower cylinder 31B, respectively. The end surface of the end portion 40a of the spring guide 40 is disposed so as to face the step 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 the outer peripheral side insertion hole 31g2 of the cylinder 31 and fixed. More specifically, for example, the seal tube 31h is press-fitted into the outer circumferential 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 insertion hole 31g2 before the seal tube 31h is press-fitted into the outer peripheral insertion hole 31g2. Further, the end 40a of the spring guide 40 is press-fitted into the seal tube 31h. The outer diameter of the spring guide 40 is thicker than the inner diameter of the seal tube 31h before the spring guide 40 is press-fitted into the seal tube 31h. When the spring guide 40 is fixed to the cylinder 31, the hollow portion 40e of the spring guide 40 and the inner circumferential 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 insertion hole 31g1 coincide with each other. The spring guide 40 is provided with a bottom lid portion 40c 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 accommodated in the protruding 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 section if the spring 36 is a cylindrical coil spring, and may have an inner wall having an elliptical cross section if the spring 36 is an elliptic coil spring. The spring guide 40 regulates the movement of the spring 36 in the radial direction so that the axial displacement of the spring 36 does not increase. Since the spring guide 40 regulates the radial movement of the spring 36, a shape in which the inner diameter of the spring guide 40 is slightly larger than the coil outer diameter of the spring 36 is desirable. That is, it is desirable that the distance between the inner wall of the spring guide 40 and the coil outer diameter of the spring 36 is small. The spring 36 can be prevented from being twisted by being guided by the inner wall of the spring guide 40 during expansion and contraction.

Since the vane 35 disposed in the vane groove 31 e slides along the inner wall of the cylinder 31, the number of parts that hold the spring 36 relative to the cylinder 31 increases as the number of parts that hold the spring 36 increases. It becomes difficult to ensure the position accuracy. By directly fixing the spring guide 40 to the cylinder 31, the part that holds the spring 36 with respect to the cylinder 31 is only 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 as large as the outer diameter of the spring guide 40 is formed in the middle container 10a of the sealed container 10 so that the spring guide 40 and the upper cylinder 31A can be joined. ing. Similarly, a through hole having a diameter of at least the outer diameter of the spring guide 40 is formed in the middle container 10a of the sealed container 10 so that the spring guide 40 and the lower cylinder 31B can be joined. Alternatively, even if one through hole is formed in the middle container 10a of the sealed container 10 so that the spring guide 40 and the upper cylinder 31A can be joined, and so that the spring guide 40 and the lower cylinder 31B can be joined. Good.

As shown in FIGS. 1 and 2, the hermetic compressor 100 protrudes from the hermetic container 10 and is joined to the hermetic container 10 to form a hermetic space together with the hermetic container 10, and the spring guide 40 is accommodated therein. A protruding container 50 is provided. The protruding container 50 includes a cylindrical portion 51 and a protruding container lid 52. The cylindrical part 51 is a member formed in a cylindrical shape that houses the spring guide 40 in the hollow part 50e. One end 50 a of the cylindrical portion 51 of the protruding container 50 is fixed to the middle container 10 a of the sealed container 10. The cylindrical portion 51 of the protruding container 50 is provided with a protruding container lid 52 at the other end 50b. The protruding container lid 52 closes the end 50b located on the opposite side of the cylindrical part 51 from the side fixed to the sealed container 10. In the cylindrical part 51, the opening of the hollow part 50 e on the end part 50 b side is closed by the protruding container lid 52.

As shown in FIG. 1, the protruding container 50 accommodates the spring guide 40 fixed to the upper cylinder 31 A and the spring guide 40 fixed to the lower cylinder 31 B in the hollow part 50 e of the cylindrical part 51. That is, the protruding container 50 accommodates a plurality of spring guides 40, that is, a spring guide 40 fixed to the upper cylinder 31 A and a spring guide 40 fixed to the lower cylinder 31 B in one protruding container 50. In the protruding container 50, an internal space surrounded by the cylindrical portion 51, the protruding container lid 52, the cylinder 31, and the spring guide 40 is a sealed space. Alternatively, in the protruding container 50, an internal space surrounded by the cylindrical portion 51, the protruding container lid 52, the cylinder 31, the spring guide 40, and the middle container 10a is a sealed space.

FIG. 3 is a flowchart showing a manufacturing process of the hermetic compressor 100 of FIG. The protruding container 50 is preferably attached to the sealed container 10 in the following order. When the process of attaching the projecting container 50 to the sealed container 10 is started, a joining process of joining the tubular part 51 formed in a tubular shape projecting from the sealed container 10 to the middle container 10a of the sealed container 10 constituting the outer shell. Perform (step S1). Next, a cylinder fixing step of fixing the hollow cylinder 31 in which the rolling piston 33 is accommodated in the middle container 10a of the sealed container 10 is performed (step S2). Next, the vane arrangement | positioning process which arrange | positions the vane 35 in the vane groove | channel 31e formed in the cylinder 31 is performed (step S3). Next, a spring guide 40 is inserted into the hollow portion 50e of the tubular portion 51 and fixed to the cylinder 31 by inserting a tubular spring guide 40 that defines the expansion and contraction direction of the spring 36 that biases the vane 35 toward the arrangement side of the rolling piston 33. A fixing process is performed (step S4). Next, the spring 36 is inserted into the spring guide 40, and a spring attachment process is performed in which 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 of the tubular portion 51 on the side opposite to the side fixed to the sealed container 10 and the protruding container lid 52 is performed ( Step S6). Through the steps S1 to S6, the process of attaching the protruding container 50 to the sealed container 10 is completed. By attaching the protruding container 50 to the sealed container 10 as described above, 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.

In the joining step (step S1), the cylindrical portion 51 of the projecting container 50 and the middle container 10a of the sealed container 10 can be joined by resistance welding by using the projecting container 50 as an iron member. In the closing step (step S6), for example, the cylindrical 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 cylindrical portion 51 and the protruding container lid 52 are joined by brazing. . The 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 protruding container 50 shown in FIG. As shown in FIG. 4, the cylindrical part 51 can be comprised from the structure divided | segmented into two, the front cylindrical part 51a and the rear cylindrical part 51b. The front cylindrical portion 51a and the rear cylindrical portion 51b are cylindrical members that house the spring guide 40 in the hollow portion 50e. One end 50a of the front cylindrical portion 51a of the protruding container 50 is fixed to the middle container 10a of the sealed container 10, and the end 50d of the rear cylindrical portion 51b is fitted to the other end 50c. Are connected together. The front cylindrical portion 51a is formed in a tapered shape with the peripheral wall becoming thinner toward the end portion 50a. The rear cylindrical portion 51b of the protruding container 50 has one end portion 50b fitted and connected to the end portion 50c of the front cylindrical portion 51a, and a protruding container lid 52 is disposed on the other end portion 50b. ing. In the rear cylindrical portion 51 b of the protruding container 50, the opening of the hollow portion 50 e on the end 50 b side is closed by the protruding container lid 52.

In the joining step (step S1), the front tubular part 51a is made of an iron member, so that the front tubular part 51a of the protruding container 50 and the middle container 10a of the sealed container 10 can be joined by resistance welding. In the closing step (step S6), the rear cylindrical portion 51b and the protruding container lid 52 of the protruding container 50 can be joined by brazing by using the rear cylindrical portion 51b and the protruding container lid 52 as a copper member. it can. Examples of the brazing method for joining the rear cylindrical portion 51b and the protruding container lid 52 include high-frequency brazing or gas brazing. The front cylindrical portion 51a and the rear cylindrical portion 51b can be joined by brazing in a furnace, for example, by using the front cylindrical portion 51a as an iron member and the rear cylindrical portion 51b as a copper member. . Note that either or both of the rear cylindrical portion 51b and the protruding container lid 52 are made of iron members, and both the rear cylindrical portion 51b and the protruding container lid 52 are formed by subjecting the iron members to copper plating. The strength of the protruding container 50 can be increased as compared with the case of using a copper member. Further, when both the rear cylindrical portion 51b and the protruding container lid 52 are made of iron members, the rear cylindrical portion 51b and the protruding container lid 52 can be joined by resistance welding.

[Operation of hermetic compressor 100]
Next, the operation of the hermetic compressor 100 will be described with reference to FIGS. 1 and 2. In the hermetic compressor 100, when the rotating shaft 32 is rotated by driving the electric mechanism unit 20, the rolling piston 33 in the cylinder 31 is also rotated together with the rotating shaft 32. The rolling piston 33 rotates eccentrically, and the vane 35 slidably in contact with the rolling piston 33 moves as the rolling piston 33 rotates. At this time, the gas refrigerant enters the cylinder chamber 31 d surrounded by the inner peripheral wall 31 b 1 of the cylinder 31, the rolling piston 33, and the vane 35 from the suction hole 34 of the compression mechanism 30 through the suction pipe 11. The gas refrigerant in the cylinder chamber 31d is compressed as the volume in the compression chamber 31d2 decreases as the rolling piston 33 rotates.

In the compression process in the compression mechanism portion 30, the tip portion 35 a of the vane 35 is in contact with the outer peripheral wall 33 a of the rolling piston 33 by the urging force of the spring 36. The vane 35 slides in the radial direction of the cylinder 31 in the vane groove 31e as the rolling piston 33 rotates eccentrically. At this time, the spring 36 expands and contracts along the inner wall of the spring guide 40, and the expansion / 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 from the discharge port (not shown) provided in the upper bearing 38 to the internal space of the sealed container 10. The gas refrigerant circulating in the inner space of the sealed 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. 10 reaches the upper part in 10 and is discharged from the discharge pipe 12 into the refrigerant circuit outside the sealed container 10.

As described above, the hermetic compressor 100 has a cylindrical spring guide 40 that protrudes from the hermetic container 10, forms a hollow portion 40 e that accommodates the spring 36, and defines the expansion and contraction direction of the spring 36. In the spring guide 40, one end 40a is fixed to the cylinder 31, 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 is connected to the spring guide 40. It is closed by the bottom lid 40c. The spring 36 is disposed between the rear side end portion 35 b of the vane 35 located on the opposite side of the rolling piston 33 and the bottom lid portion 40 c of the spring guide 40 protruding from the sealed container 10. The spring 36 of the hermetic compressor 100 is disposed between the rear side end portion 35b of the vane 35 and the bottom lid portion 40c of the spring guide 40 protruding from the hermetic container 10, so that the rear side end portion 35b and the rear side end portion 35b are sealed. The expansion / contraction allowance can be ensured as compared with the arrangement between the container 10 and the container 10. In the hermetic compressor 100, the spring guide 40 is directly fixed to the cylinder 31, so that the holding part between the cylinder 31 and the spring 36 becomes only the spring guide 40, and the position between the spring 36 and the vane 35. Accuracy can be ensured.

Further, the hermetic compressor 100 has a plurality of cylinders 31, and a plurality of spring guides 40 are fixed to the plurality of cylinders 31, respectively, and the protruding container 50 accommodates the plurality of spring guides 40. The protruding container 50 accommodates the plurality of spring guides 40, so that the joining step (step S 1) has only to be performed once. Compared with the case where the joining step is provided for each spring guide 40, The manufacturing process can be simplified.

The protruding container 50 has a cylindrical part 51 formed in a cylindrical shape and fixed to the sealed container 10, and an end part 50 b located on the opposite side of the cylindrical part 51 from the side fixed to the sealed container 10. And a protruding container lid 52. The spring guide 40 and the spring 36 are attached from the cylindrical portion 51 fixed to the sealed container 10, and then the cylindrical portion 51 is closed with the protruding container lid 52, thereby preventing thermal distortion of the spring guide 40 and the spring 36. Then, the inside of the protruding container 50 can be sealed.

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

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

Moreover, in the manufacturing method of the hermetic compressor 100, in the closing step (step S6), the cylindrical 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 cylindrical portion 51 and the protruding container lid 52 are joined by brazing. By joining the cylindrical portion 51 and the protruding container lid 52 by a low heat input bonding 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.
FIG. 5 is a longitudinal sectional view of hermetic compressor 110 according to the second embodiment of the present invention. Parts having the same configuration as the hermetic compressor 100 of FIGS. 1 to 4 are denoted by the same reference numerals and description thereof is omitted. Items not particularly described in the hermetic compressor 110 according to the second embodiment are the same as those of the hermetic 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 hermetic compressor 100 according to the first embodiment, the number of protruding containers 50 fixed to the middle container 10a is always one regardless of the number of cylinders 31 arranged in the hermetic container 10. On the other hand, in the hermetic compressor 110 according to the second embodiment, the number of protruding containers 50 fixed to the middle container 10a changes according to the number of cylinders 31 arranged in the sealed container 10. It is. In other words, the hermetic compressor 110 includes the same number of protruding containers 50 as the number of the plurality of cylinders 31. Each of the plurality of protruding containers 50 accommodates one spring guide 40. For example, as shown in FIG. 5, the hermetic compressor 110 according to the second embodiment has a central part when the number of cylinders 31 arranged in the hermetic container 10 is two, that is, an upper cylinder 31A and a lower cylinder 31B. The number of the protruding containers 50 fixed to the container 10a is also two. In the two protruding containers 50, a spring guide 40 fixed to the upper cylinder 31A is accommodated in one protruding container 50, and a spring guide 40 fixed to the lower cylinder 31B is stored in the other protruding container 50. Contained.

As described above, the hermetic 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 hermetic compressor 110 has the same number of protruding containers 50 as the plurality of cylinders 31, and each of the protruding containers 50 accommodates one spring guide 40. Each of the plurality of protruding containers 50 accommodates one spring guide 40, so that, 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 sealed space is provided for each spring 36. Can be formed.

The embodiment of the present invention is not limited to the above-described Embodiments 1 and 2, and various modifications can be added. For example, the hermetic compressor 100 and the hermetic compressor 110 have been described with respect to the twin rotary type compressor having two cylinders 31, but the hermetic compressor 100 and the hermetic compressor 110 have one cylinder 31. A single rotary type compressor may be used. In addition, in the hermetic compressor 100, the insertion hole 31g has a circular cross-sectional shape, but the insertion hole 31g may be formed in an elliptical shape, an oval shape, or a polygonal shape, for example. In this case, the cross-sectional shape of the spring guide 40 formed in a cylindrical shape is formed in an elliptical shape, an oval shape, or a polygonal shape in accordance with the cross-sectional shape of the insertion hole 31g.

10 sealed 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 section, 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 peripheral wall, 31g insertion hole, 31g1 Inner peripheral side insertion hole, 31g2, outer peripheral side insertion hole, 31h seal tube, 32 rotary shaft, 32a eccentric part, 33 rolling piston, 33a outer peripheral wall, 34 suction hole, 34B discharge hole, 35 vane, 35a tip, 35b rear side End, 36 sp , 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, 50d hollow, 51 cylindrical, 51a front cylindrical, 51b rear cylindrical, 52 protruding container lid, 100 hermetic compressor, 110 hermetic compressor .

Claims

A sealed container;
A hollow cylinder housed in the sealed container;
A rolling piston that rotates eccentrically along the inner peripheral wall of the cylinder;
A vane that contacts an outer peripheral wall of the rolling piston and divides a space in the cylinder into a suction chamber and a compression chamber;
A spring that biases the vane toward the arrangement side of the rolling piston;
A cylindrical spring guide that protrudes from the sealed container, forms a hollow portion that houses the spring, and defines the expansion and contraction direction of the spring;
A protruding container that protrudes from the sealed container, forms a sealed space together with the sealed container, and houses the spring guide therein;
With
The cylinder has an insertion hole into which the spring is inserted,
The spring guide has one end fixed to the cylinder and the hollow part communicating with the insertion hole, and the other end is closed by a bottom cover part,
The spring is a hermetic compressor that is disposed between a rear side end portion of the vane located on the opposite side of the rolling piston and the bottom lid portion.
Having a plurality of said cylinders;
A plurality of the spring guides are respectively fixed to the plurality of cylinders,
The hermetic compressor according to claim 1, wherein the protruding container accommodates a plurality of the spring guides.
Having a plurality of said cylinders;
A plurality of the spring guides are respectively fixed to the plurality of cylinders,
Having the same number of the protruding containers as the number of the plurality of cylinders;
The hermetic compressor according to claim 1, wherein each of the plurality of projecting containers accommodates one spring guide.
The protruding container is
A cylindrical portion formed in a cylindrical shape and fixed to the sealed container;
A protruding container lid that closes an end portion of the cylindrical portion located on the side opposite to the side fixed to the sealed container;
The hermetic compressor according to any one of claims 1 to 3, wherein:
The cylindrical part is
A front cylindrical portion fixed to the sealed container;
A rear cylindrical portion that is fitted with the front cylindrical portion and in which the protruding container lid is disposed,
The hermetic compressor according to claim 4, comprising:
A joining step of joining a cylindrical portion formed in a cylindrical shape protruding from the sealed container to the sealed container constituting the outer shell;
A cylinder fixing step of fixing a hollow cylinder in which the rolling piston is accommodated in the sealed container;
A vane disposing step of disposing a vane in a vane groove formed in the cylinder;
A spring guide fixing step of inserting a cylindrical spring guide that defines the expansion and contraction direction of a spring that biases the vane toward the arrangement side of the rolling piston from the hollow portion of the cylindrical portion and fixing the cylinder to the cylinder;
A spring mounting step of inserting the spring into the spring guide, abutting one end of the spring against the vane and fixing the other end to the spring guide;
A closing step of sealing the inside of the tubular portion by joining an end portion located on the opposite side to the side of the tubular portion fixed to the sealed container, and a protruding container lid;
The manufacturing method of the hermetic compressor which has.
In the closing step,
The method for manufacturing a hermetic 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 hermetic compressor according to claim 6, wherein the cylindrical portion and the protruding container lid are joined by brazing.