CN114667394A - Sealed compressor, refrigeration cycle device, and method for manufacturing sealed compressor - Google Patents
Sealed compressor, refrigeration cycle device, and method for manufacturing sealed compressor Download PDFInfo
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- CN114667394A CN114667394A CN201980102197.0A CN201980102197A CN114667394A CN 114667394 A CN114667394 A CN 114667394A CN 201980102197 A CN201980102197 A CN 201980102197A CN 114667394 A CN114667394 A CN 114667394A
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- container
- cylinder
- spring
- hermetic compressor
- protruding
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- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 21
- 238000005057 refrigeration Methods 0.000 title claims description 13
- 238000003780 insertion Methods 0.000 claims abstract description 46
- 230000037431 insertion Effects 0.000 claims abstract description 46
- 230000002093 peripheral effect Effects 0.000 claims abstract description 42
- 238000005304 joining Methods 0.000 claims description 38
- 238000003466 welding Methods 0.000 claims description 28
- 238000005219 brazing Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 description 27
- 230000006835 compression Effects 0.000 description 24
- 238000007906 compression Methods 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 239000003507 refrigerant Substances 0.000 description 17
- 229910052742 iron Inorganic materials 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2230/00—Manufacture
- F04C2230/20—Manufacture essentially without removing material
- F04C2230/23—Manufacture essentially without removing material by permanently joining parts together
- F04C2230/231—Manufacture essentially without removing material by permanently joining parts together by welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
Abstract
The hermetic compressor of the present invention comprises: a closed container; a hollow cylinder housed in the closed container; a rotary piston eccentrically rotating along an inner circumferential wall of the cylinder; a vane reciprocating in a vane groove provided in a cylinder in a radial direction of the cylinder; and a spring that biases the vane toward the side where the rotary piston is disposed. The hermetic compressor further includes: a protruding container which is provided in a radial direction of the cylinder so as to protrude from the closed container to a side opposite to the cylinder, and one end of which is engaged with the closed container and communicates with the inside of the closed container, thereby forming a closed space; and a spring guide which is disposed in the closed space of the protrusion container and in which a spring is fixed. An insertion hole is formed in the outer peripheral wall of the cylinder, and one end of the spring guide is inserted into and fixed to the insertion hole of the cylinder.
Description
Technical Field
The present invention relates to a hermetic compressor used in an air conditioner, a refrigerator, a freezer, or the like, a refrigeration cycle device, and a method for manufacturing a hermetic compressor.
Background
The hermetic compressor comprises: an annular cylinder housed in the closed container; a rotary piston that eccentrically rotates within the cylinder; and a vane reciprocating in a vane groove provided in the cylinder. The vane is urged by a spring so that the tip of the vane always abuts against the rotary piston, thereby partitioning the space inside the cylinder into a low-pressure space and a high-pressure space. Then, the rotary piston eccentrically moves in the cylinder, thereby reducing the volume of the low-pressure space to a high-pressure space, and compressing the refrigerant sucked into the cylinder.
In such a hermetic compressor, a spring for biasing the vane is housed in a spring insertion hole formed in the cylinder and is held in the cylinder. In the structure in which the spring is held in the cylinder in this manner, 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 casing, and cannot be further increased. Therefore, when the vane moves to the rearmost top dead center position of the reciprocating motion, the total length of the spring reaches the contact length at which the spring contracts to the maximum, and stress generated in the spring increases, which may cause fatigue damage of the spring.
Therefore, there are techniques as follows: a space for housing the spring is secured outside the sealed container, and the restriction on the length of the spring is eliminated to prevent fatigue damage due to excessive stress on the spring (see, for example, patent document 1).
Patent document 1: japanese patent laid-open publication No. 63-16189
The sealed compression mechanism of patent document 1 is configured such that a protruding container protruding in the radial direction of the cylinder from the sealed container to the opposite side of the cylinder is joined to the sealed container, and a spring is directly disposed in the protruding container. In this configuration, if the assembly accuracy of the sealed container and the cylinder is poor, the positional relationship between the protruding container joined to the sealed container and the cylinder is deviated from a proper position. The spring is required to be disposed in a direction perpendicular to the central axis of the cylinder. However, if the positional relationship between the protruding container and the cylinder deviates from the normal position, the positional relationship between the vane positioned with reference to the cylinder and the spring positioned with reference to the protruding container also has a problem of deviating from the normal position.
Disclosure of Invention
The present invention solves the above problems, and provides a sealed compressor, a refrigeration cycle device, and a method for manufacturing a sealed compressor, which can ensure the accuracy of the positional relationship between a spring and a vane.
The hermetic compressor according to the present invention includes: a closed container; a hollow cylinder housed in the closed container; a rotary piston eccentrically rotating along an inner circumferential wall of the cylinder; a vane reciprocating in a vane groove provided in the cylinder in a radial direction of the cylinder; a spring that urges the vane toward the side where the rotary piston is disposed; a protruding container which is provided in a radial direction of the cylinder so as to protrude from the closed container to a side opposite to the cylinder, and one end of which is engaged with the closed container and communicates with the inside of the closed container, thereby forming a closed space; and a spring guide disposed in the closed space of the protruding container and fixing the spring therein, wherein an insertion hole is formed in an outer circumferential wall of the cylinder, and one end of the spring guide is inserted into and fixed to the insertion hole of the cylinder.
According to the present invention, since the spring guide is directly fixed to the cylinder, the positional accuracy of the spring fixed to the spring guide and the vane disposed in the vane groove of the cylinder can be ensured.
Drawings
Fig. 1 is a schematic longitudinal sectional view of a hermetic compressor according to embodiment 1.
Fig. 2 is a schematic cross-sectional view taken along line a-a of fig. 1.
Fig. 3 is a schematic cross-sectional view showing structural example 1 of a contact portion between a protruding container and a closed container of the hermetic compressor according to embodiment 1.
Fig. 4 is a schematic cross-sectional view showing structural example 2 of a contact portion between the protruding container and the closed container in the hermetic compressor according to embodiment 1.
Fig. 5 is a schematic cross-sectional view showing structural example 3 of a contact portion between a protruding container and a closed container of the hermetic compressor according to embodiment 1.
Fig. 6 is a flowchart showing a manufacturing process of the hermetic compressor according to embodiment 1.
Fig. 7 is a schematic cross-sectional view showing a modification of the protruding container of the hermetic compressor according to embodiment 1.
Fig. 8 is a schematic vertical sectional view of the hermetic compressor according to embodiment 2.
Fig. 9 is a diagram showing a refrigerant circuit of the refrigeration cycle apparatus according to embodiment 3.
Detailed Description
The hermetic compressor 100, the hermetic compressor 110, and the like according to the embodiment will be described below with reference to the drawings. In the following drawings including fig. 1, the relative dimensional relationships, shapes, and the like of the respective components may be different from those in reality. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and this is common throughout the specification. For the sake of easy understanding, terms indicating directions such as "upper", "lower", "front", "rear", and the like are used as appropriate, and these terms are described for convenience of description only, and do not limit the arrangement and orientation of the devices or the components.
Embodiment 1.
[ hermetic compressor 100]
Fig. 1 is a schematic longitudinal sectional view of a hermetic compressor according to embodiment 1. Fig. 2 is a schematic sectional view taken along line a-a of fig. 1. Fig. 2 shows a state where the cross section of the line a-a is rotated 90 degrees counterclockwise.
(closed vessel 10)
The sealed container 10 constitutes an outer shell of the hermetic compressor 100 and is made of an iron member. The closed casing 10 includes a substantially cylindrical middle casing 10a, an upper casing 10b closing an opening in an upper portion of the middle casing 10a, and a lower casing 10c closing an opening in a lower portion of the middle casing 10a. The closed casing 10 is held in a closed state by fitting the upper casing 10b into an upper opening of the intermediate casing 10a and fitting the lower casing 10c into a lower opening of the intermediate casing 10a. The closed casing 10 is disposed on the base 14, and the lower casing 10c is fixed to the base 14. Hermetic compressor 100 has base 14 fixed to an installation site by bolts or the like.
A suction pipe 11 to which an accumulator 13 is attached is connected to the middle tank 10a. A discharge pipe 12 is connected to the upper vessel 10b. The suction pipe 11 is a connection pipe for sending the low-temperature and low-pressure gas refrigerant sucked through the accumulators 1 and 3 into the compression mechanism 30. The discharge pipe 12 is a connection pipe for discharging the high-temperature and high-pressure gas refrigerant in the closed casing 10 compressed by the compression mechanism 30 to the outside of the closed casing 10.
(electric mechanism section 20)
The electric mechanism 20 rotates the rotary shaft 32 inside the sealed container 10. The electric mechanism 20 is disposed above the compression mechanism 30 in the closed casing 10. The electric mechanism 20 includes a stator 21 fixed to the inner peripheral wall of the intermediate container 10a, and a rotor 22 rotatably fitted to the inner peripheral side of the stator 21. The stator 21 is fixed to the middle container 10a of the closed container 10 by various fixing methods such as shrink fitting and welding. A rotation shaft 32 is fixed to a center portion of the rotor 22. The rotation shaft 32 extends downward from the electric mechanism section 20. Stator 21 rotates rotor 22 by electric power supplied from the outside of hermetic compressor 100.
(compression mechanism 30)
The compression mechanism 30 is housed in the closed casing 10, and compresses the refrigerant flowing into the closed casing 10. The compression mechanism 30 is disposed below the electric mechanism 20 and fixed to the middle tank 10a. The compression mechanism unit 30 includes two compression mechanisms disposed in the axial direction of the rotary shaft 32, an upper bearing 38, a lower bearing 39, and a partition plate 37. Each compression mechanism includes a hollow cylinder 31, a rotary piston 33, a vane 35, a spring 36, and a cylindrical spring guide 40 in which the spring 36 is accommodated. Two spring guides 40 are arranged in the protruding container 50. The protruding container 50 is provided in the closed casing 10 so as to protrude from the closed casing 10 in the radial direction of the cylinder 31 on the side opposite to the cylinder 31. Hereinafter, the upper cylinder 31 of the compression mechanism is referred to as an upper cylinder 31A, and the lower cylinder 31 of the compression mechanism is referred to as a lower cylinder 31B.
In the closed casing 10, the upper cylinder 31A is disposed above the lower cylinder 31B. The upper bearing 38 is disposed above the upper cylinder 31A so as to contact the upper end surface of the upper cylinder 31A, and the upper end surface of the upper cylinder 31A is closed by the upper bearing 38. In the lower portion of the lower cylinder 31B, a lower bearing 39 is disposed so as to contact the lower end surface 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 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.
As shown in fig. 2, which will be described later, the upper cylinder 31A and the lower cylinder 31B are formed with suction holes 34 and discharge holes 34B on both sides thereof with vane grooves 31e interposed therebetween in the circumferential direction. The suction pipe 11A is connected to the suction hole 34 of the upper cylinder 31A. The suction pipe 11B is connected to the suction port 34 of the lower cylinder 31B. The suction pipe 11 is a generic name of the suction pipe 11A and the suction pipe 11B. The discharge hole 34B is formed radially outward from the inner peripheral wall 31B of the cylinder 31, and communicates with the space in the closed casing 10 via a discharge hole (not shown) formed in the upper bearing 38.
The rotary shaft 32 has an eccentric portion 32a eccentric in one radial direction at one end in the axial direction. The other end portion side in the axial direction of the rotating shaft 32 is inserted into and fixed to the center portion of the rotor 22 of the electric mechanism 20. The rotary shaft 32 is rotatably supported by an upper bearing 38 and a lower bearing 39, and rotates together with the rotor 22.
The spring guide 40 is provided to protrude from the hermetic container 10 to the outside, and houses and fixes the spring 36 therein. The spring guides 40 are provided corresponding to the upper cylinder 31A and the lower cylinder 31B, respectively, and are collectively accommodated in the protrusion container 50.
The structure of the compression mechanism 30 will be further described below with reference to fig. 2 and 1. The relationship among the rotary piston 33, the vane 35, the spring 36, and the spring guide 40 in the upper cylinder 31A is the same as the relationship among the rotary piston 33, the vane 35, the spring 36, and the spring guide 40 in the lower cylinder 31B. Therefore, in the following description, the upper cylinder 31A and the lower cylinder 31B will not be described separately, and the cylinder 31 will be described as a general term for the upper cylinder 31A and the lower cylinder 31B. In fig. 2, the eccentric portion 32a disposed in the cylinder 31 is not shown.
As shown in fig. 2, the cylinder 31 is formed to be hollow. The cylinder 31 has a cylinder chamber 31d therein concentric with the rotary shaft 32. A rotary piston 33 is disposed in the cylinder chamber 31d. The inner peripheral wall 31b of the cylinder 31 faces an outer peripheral wall 33a formed in the cylindrical rotary piston 33.
The rotary piston 33 is formed in a cylindrical shape. The rotary piston 33 is located eccentrically with respect to the center axis C of the rotary shaft 32. The rotary piston 33 is attached to the eccentric portion 32a of the rotary shaft 32 in the cylinder chamber 31d so as to be rotatable together with the rotary shaft 32. The rotary piston 33 eccentrically rotates along the inner circumferential wall 31b of the cylinder 31 by the rotation of the rotary shaft 32.
The cylinder 31 has a vane groove 31e that communicates with the cylinder chamber 31d and extends in the radial direction. In the vane groove 31e, a vane 35 is disposed so as to be movable forward and backward in the cylinder radial direction. The vane 35 is slidably disposed in the vane groove 31e. An insertion hole 31g communicating with the vane groove 31e is formed on the cylinder radial direction outer side of the vane groove 31e. The insertion hole 31g is formed to extend from the vane groove 31e to the outer peripheral wall 31f of the cylinder 31.
In the insertion hole 31g, a spring 36 is inserted and disposed from the outer peripheral wall 31f side. The spring 36 biases the vane 35 disposed in the vane groove 31e toward the disposition side of the rotary piston 33, and brings the tip end portion 35a of the vane 35 into contact with the rotary piston 33. The vane 35 is pressed inward in the cylinder radial direction by the urging force of the spring 36, and thereby the tip portion 35a of the vane 35 is always in contact with the rotary piston 33. As the tip end 35a of the vane 35 abuts against the rotary piston 33 in this way, the interior of the cylinder chamber 31d is divided into a suction chamber 31d1 communicating with the suction port 34 and a compression chamber 31d2 communicating with the discharge port 34B. The vane 35 reciprocates in the vane groove 31e with the distal end portion 35a in contact with the outer peripheral wall 33a of the rotary piston 33 as the rotary piston 33 rotates eccentrically in the cylinder chamber 31d.
The insertion hole 31g has 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, on the vane groove 31e side. The outer peripheral insertion hole 31g2 and the inner peripheral insertion hole 31g1 are circular in cross-sectional shape. When the diameter of the outer peripheral side insertion hole 31g2 is set to φ D and the diameter of the inner peripheral side insertion hole 31g1 is set to φ D, φ D is smaller than φ D (φ D < φ D). That is, the insertion hole 31g has a plurality of portions having different diameters in the central axial direction of the insertion hole 31g from the outer circumferential wall 31f side toward the inner circumferential 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 so as to have a diameter smaller toward the vane groove 31e. The central axis of the outer peripheral insertion hole 31g2 is coaxial with the central axis of the inner peripheral insertion hole 31g1, and both the central axes intersect with the central axis C of the rotary shaft 32 extending perpendicular to the paper surface.
The spring 36 is disposed within the spring guide 40. The spring 36 is disposed in a direction perpendicular to the central axis C of the cylinder 31. One end 36a of the spring 36 in the longitudinal direction is attached to the rear surface side end 35b of the blade 35, and the other end 36b is fixed to a bottom cover portion 40c of the spring guide 40, which will be described later. That is, the spring 36 is disposed between the back-side end 35b of the vane 35 and the bottom cover 40c of the spring guide 40.
The spring 36 is a compression coil spring that is compressed to utilize a reaction force, and is a cylindrical coil spring. The spring 36 is preferably a cylindrical coil spring, but is not limited to a cylindrical coil spring.
The outer diameter of the coil of the spring 36 may be the same or different over the longitudinal direction. As a structure in which the coil outer diameters of the springs 36 are different, for example, a structure in which the diameter of the other end portion 36b of the spring 36 is larger than the diameter of the other portion may be considered. In the case where the spring 36 is configured to have a large diameter portion and a small diameter portion as described above, the spring 36 may be configured to be fixed in the spring guide 40 through the large diameter portion. For example, the spring 36 may be fixed in the spring guide 40 by providing a circumferential groove in the inner peripheral surface of the spring guide 40 and fitting the large-diameter portion into the groove. In this way, when the spring 36 is fixed in the spring guide 40 by the large diameter portion, the bottom cover portion 40c for holding the spring 36 in the spring guide 40 is not required. Therefore, the bottom lid portion 40c may be omitted.
The spring guide 40 is a tubular member, and has one end 40a inserted and fixed into an insertion hole 31g provided in the cylinder 31 and the other end 40b protruding outside the sealed container 10 through a through hole 10d provided in the sealed container 10. The other end 40b of the spring guide 40 is closed by a bottom cover 40c.
The spring guide 40 defines the telescopic direction of the spring 36 and guides the telescopic action thereof. In addition, the spring guide 40 restricts the radial movement of the spring 36 so that the shaft offset of the spring 36 does not become large. Accordingly, it is preferred that the inner wall of the spring guide 40 be spaced less from the helical shape of the spring 36. Thus, the spring guide 40 has an inner wall along the outer diameter of the coil of the spring 36. The spring guide 40 has an inner wall having a circular cross-sectional shape if the spring 36 is a cylindrical coil spring, and has an inner wall having an elliptical cross-sectional shape if the spring 36 is an elliptical coil spring, for example.
The protruding container 50 has a cylindrical portion 51 having both ends open, and a protruding container lid 52. One end 50a of the cylindrical portion 51 is joined to a through hole 10d formed in the middle container 10a of the closed container 10, and the cylindrical portion 51 communicates with the inside of the closed container 10. The other end 50b of the cylindrical portion 51 is closed by a protruding container lid 52. Thus, the protruding container 50 communicates with the inside of the closed container 10, and the other end 50b of the cylindrical portion 51 is closed by the protruding container lid 52, thereby forming a closed space 50e. The spring guide 40 is accommodated in the closed space 50e. Hereinafter, the end of the protruding container 50 on the side of joining with the closed casing 10 will be referred to as one end 50a using the reference numeral given to the cylindrical portion 51.
However, in the conventional hermetic compressor, the spring is directly disposed in the protruding container, and the protruding container is provided so as to protrude from the hermetic container in a radial direction of the cylinder toward a side opposite to the cylinder. The protruding container is joined to the closed casing, and more specifically, is joined to the closed casing so as to extend along a direction orthogonal to the central axis of the closed casing. In this way, since the protruding container is joined to the closed container, when the assembly accuracy of 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.
The cylinder 31 is preferably fixed in the closed casing 10 so that the central axis of the cylinder 31 coincides with the central axis of the closed casing 10. Further, it is preferable that the spring 36 is disposed along a direction orthogonal to the central axis of the cylinder 31. However, if the assembly accuracy is poor, for example, the central axis of the cylinder 31 and the central axis of the closed casing 10 are not aligned but are disposed obliquely, the protruding casing 50 is in a state of being inclined with respect to the direction orthogonal to the central axis of the cylinder 31. Therefore, if the spring 36 is directly disposed in the protruding container 50, the spring 36 is also inclined from the direction perpendicular 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 blade 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.
In contrast, in embodiment 1, a spring guide 40 is separately provided in the protruding container 50, and the spring 36 is disposed in the spring guide 40. The spring guide 40 is directly fixed to the cylinder 31. That is, the spring 36 is provided with reference to the cylinder 31. Therefore, even if the center axis of the cylinder 31 is inclined with respect to the center axis of the closed casing 10 during the manufacturing, the spring 36 can be accurately installed in the direction perpendicular to the center axis of the cylinder 31 without being affected by the inclination. Therefore, the positional accuracy of the spring 36 and the blade 35 can be ensured. This can suppress the spring 36 from twisting or the like during expansion and contraction of the spring 36, and can stabilize the operation of the spring 36.
Next, a fixing structure of the spring guide 40 to the cylinder 31 will be described.
The one end 40a of the spring guide 40 is fixed to the cylinder 31 by using a seal pipe 31h described later and press-fitting it into an outer peripheral side insertion hole 31g2 of an insertion hole 31g formed in the outer peripheral wall 31f of the cylinder 31. The sealing tube 31h is a cylindrical tube. The spring guide 40 and the seal tube 31h have the following dimensional relationship in a 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. The seal pipe 31h is press-fitted between the outer peripheral surface of the 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 press-fitted and fixed to the cylinder 31.
In a state where the spring guide 40 is fixed to the cylinder 31, the inside of the spring guide 40 communicates with an inner peripheral side insertion hole 31g1 formed in an insertion hole 31g of the cylinder 31. The inner diameter of the spring guide 40 is the same as the inner diameter of the inner peripheral insertion hole 31g1, and the spring guide 40 is fixed to the cylinder 31 such that the center axis of the spring guide 40 coincides with the center axis of the inner peripheral insertion hole 31g1.
In the case of a configuration in which a plurality of members are used to fix the spring 36 to the cylinder 31, it becomes difficult to ensure the positional accuracy of the spring 36 and the vane 35 as the number of members increases. In contrast, in embodiment 1, since only the spring guide 40 is required to fix the spring 36 to the cylinder 31, the positional accuracy of the spring 36 and the vane 35 can be ensured.
Next, a method of joining the one end portion 50a of the protrusion container 50 to the middle container 10a of the closed container 10 will be described.
A through hole 10d is formed in the middle container 10a of the closed container 10, and one end 50a of the protruding container 50 is joined to the through hole 10d. Since the contact portion between the one end portion 50a of the protrusion container 50 and the middle container 10a of the closed container 10 is a curved surface, a gap is likely to be generated, and defects such as blowholes are likely to be generated in the joining method by soldering or welding. Therefore, resistance welding is preferable for the method of joining the one end portion 50a of the protrusion container 50 with the middle container 10a of the hermetic container 10. Resistance welding is a welding method capable of efficiently welding in a short time, and is characterized in that welding is performed in a short time and thus is not easily affected by heat. When resistance welding is used, the protrusion container 50 is made of an iron member, as in the case of the closed container 10.
In the case where one end portion 50a of the protrusion container 50 is resistance-welded to the middle container 10a of the hermetic container 10, it is preferable to reduce the contact width of the one end portion 50a of the protrusion container 50 with the middle container 10a of the hermetic container 10. When the contact width is small, the resistance increases, and the temperature of the joint portion is likely to increase even at a low current, thereby facilitating the joining. Therefore, in embodiment 1, the structure of fig. 3 or 4 below is adopted as the structure of the one end portion 50a of the protruding container 50 to reduce the contact width with the intermediate container 10a of the closed container 10.
Fig. 3 is a schematic cross-sectional view showing structural example 1 of a contact portion between a protruding container and a closed container of the hermetic compressor according to embodiment 1.
As shown in fig. 3, one end portion 50a of the protrusion container 50 has a tapered shape, and the wall thickness thereof becomes thinner toward the closed container 10.
Fig. 4 is a schematic cross-sectional view showing structural example 2 of a contact portion between a protruding container and a closed container of the hermetic compressor according to embodiment 1.
As shown in fig. 4, when the one end 50a of the protruding container 50 is viewed in the direction of the axis 53 of the protruding container 50, a part of the end surface 50aa is positioned inside the through hole 10d of the closed casing 10. Thus, the end face 50aa of the one end 50a of the cylindrical portion 51 of the protrusion container 50 is not in contact with the entire surface of the closed container 10.
With the above configuration, the contact width between the one end portion 50a of the protruding container 50 and the middle container 10a of the closed container 10 can be reduced, and the joining by resistance welding can be facilitated.
The joining of the one end 50a of the protruding container 50 to the sealed container 10 may be performed by brazing or welding, in addition to resistance welding. An example of the structure of the contact portion between the protruding container 50 and the closed casing 10 when the joining is performed by brazing or welding is shown in fig. 5 below.
Fig. 5 is a schematic cross-sectional view showing structural example 3 of a contact portion between a protruding container and a closed container of the hermetic compressor according to embodiment 1.
As shown in fig. 5, the middle container 10a of the closed container 10 has a ring 10e, and the ring 10e is bent so that the periphery of the through hole 10d to which the protruding container 50 is joined protrudes in the radial direction of the cylinder 31 to the opposite side of the cylinder 31 with respect to the closed container 10. The protruding container 50 is inserted with one end 50a of the cylindrical portion 51 inside the annular ring 10e, and joined by brazing or welding. That is, one end 50a of the cylindrical portion 51 is joined to the inner peripheral surface 10ea of the annular ring 10e by brazing or welding. Although not shown, one end 50a of the cylindrical portion 51 may be expanded outward, and the expanded portion may be joined to the inner wall surface 10aa of the closed casing 10. One end 50a of the cylindrical portion 51 may be joined to both the inner circumferential surface 10ea of the annular ring 10e and the inner wall surface 10aa of the closed casing 10.
By providing the annular ring 10e around the through hole 10d to which the protruding container 50 is joined, the contact distance between the one end 50a of the cylindrical portion 51 and the annular ring 10e can be ensured. Therefore, even if a joining method by brazing or welding is used, defects such as blowholes are less likely to occur, and joining can be performed satisfactorily.
[ method for manufacturing hermetic compressor 100]
Next, a method of manufacturing a main portion of the hermetic compressor will be described.
Fig. 6 is a flowchart showing a manufacturing process of the hermetic compressor according to embodiment 1. The protruding container 50 is preferably attached to the closed casing 10 in the following order. In mounting the protrusion container 50 to the closed container 10, first, a joining step of joining the one end portion 50a of the cylindrical portion 51 of the protrusion container 50 to the middle container 10a of the closed container 10 is performed (step S1). In the joining step (step S1), the resistance welding described above is used.
Next, a cylinder fixing step of fixing the cylinder 31 in the middle part container 10a of the closed casing 10 is performed (step S2). Further, the hermetic compressor 100 of fig. 1 has a plurality of compression mechanisms. Therefore, in the cylinder fixing step, the integrated body in which the upper bearing 38, the two cylinders 31, the partition plate 37, the lower bearing 39, and the rotary shaft 32 including the two rotary pistons 33 are combined is inserted into the closed casing 10, and the two cylinders 31 are fixed to the inner peripheral surface of the intermediate casing 10a. Each cylinder 31 is fixed to the intermediate container 10a at a position where the insertion hole 31g faces the through hole 10d of the closed container 10.
Next, a blade disposing step of disposing the blades 35 in the blade grooves 31e of the cylinder 31 from the other end 50b of the cylindrical portion 51 of the protrusion container 50 is performed (step S3). Next, a spring guide fixing step of inserting and fixing the spring guide 40 from the other end 50b of the cylindrical portion 51 into the cylinder 31 is performed (step S4). Next, a spring mounting step is performed in which the spring 36 is inserted into the spring guide 40, one end of the spring 36 on the insertion direction front end side is mounted to the rear surface side end portion 35b of the blade 35, and the other end 36b is fixed to the bottom cover portion 40c of the spring guide 40 (step S5). Finally, a closing step of joining the protruding container lid 52 to the other end 50b of the cylindrical portion 51 to close the inside of the cylindrical portion 51 is performed (step S6).
By performing the steps from step S1 to step S6, the step of attaching the protruding container 50 to the closed casing 10 is completed, and the inside of the protruding container 50 can be closed.
In the above manufacturing method, since the protruding container 50 is joined to the closed casing 10 at the initial stage, thermal deformation of the spring guide 40 and the spring 36 can be prevented. That is, when the process of joining the protrusion container 50 and the closed container 10 is performed after the spring guide 40 and the spring 36 are attached to the closed container 10, heat during the joining may be transmitted to the spring guide 40 and the spring 36. However, in embodiment 1, the thermal deformation of the spring guide 40 and the spring 36 can be prevented by performing the step of joining the protruding container 50 to the closed casing 10 before the spring guide 40 and the spring 36 are attached to the closed casing 10.
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 or fusion welding. Alternatively, in the closing step (step S6), the cylindrical portion 51 and the protruding container lid 52 may be joined by brazing, for example, by making the protruding container lid 52 a copper member or a copper-plated iron member. 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 modification of the protruding container of the hermetic compressor according to embodiment 1.
As shown in fig. 1 to 5, the cylindrical portion 51 may be formed of one member, and as shown in fig. 7, for example, two members, a front cylindrical portion 51a and a rear cylindrical portion 51b, which are divided in the direction of the shaft 53 at the center portion, may be formed. The front cylindrical portion 51a and the rear cylindrical portion 51b are cylindrical members that house the spring guide 40 inside.
One end portion 51aa of the front cylindrical portion 51a is joined to the middle container 10a of the closed container 10, and one end portion 51ba of the rear cylindrical portion 51b is joined to the other end portion 51ab. The front cylindrical portion 51a is formed in a tapered shape, and the thickness thereof becomes thinner toward the one end portion 51aa. In the rear cylindrical portion 51b, one end portion 51ba is joined to the other end portion 51ab of the front cylindrical portion 51a, and a protruding container lid 52 is joined to the other end portion 51bb. The protruding container 50 of the modified example is sealed by the protruding container lid 52 closing the other end 51bb of the rear cylindrical portion 51b.
In the case of the configuration in which the cylindrical portion 51 is divided in this way, the front cylindrical portion 51a and the rear cylindrical portion 51b may be formed of materials different from each other. In addition, the workability can be improved by using the following production method.
The flow of mounting the protrusion container 50 to the closed casing 10 shown in fig. 7 is the same as that shown in fig. 6. Since the cylindrical portion 51 is divided into the front cylindrical portion 51a and the rear cylindrical portion 51b, in the joining step (step S1), the front cylindrical portion 51a is first joined to the closed casing 10. By making the front cylindrical portion 51a an iron member as in the case of the closed casing 10, the front cylindrical portion 51a of the protruding casing 50 can be joined to the closed casing 10 by resistance welding. Here, since the cylindrical portion 51 is divided into two parts and only the front cylindrical portion 51a is joined to the middle container 10a of the closed container 10, the length in the axial direction 53 is shorter than that in the case of the undivided structure, and therefore, the joining work is easy for the operator.
Then, a cylinder fixing process (step S2), a spring guide fixing process (step S4), and a spring mounting process (step S5) are performed. In each of these steps, the length in the direction of the shaft 53 is shorter than that in the structure in which the cylindrical portion 51 is not divided, and thus the operator can easily perform the work. Then, the rear cylindrical portion 51b is joined to the front cylindrical portion 51a, and then a sealing step is performed (step S6).
In the closing step (step S6), the rear cylindrical portion 51b of the protruding container 50 and the protruding container lid 52 can be joined by brazing by forming the rear cylindrical portion 51b and the protruding container lid 52 as copper members. As a brazing method for joining the rear cylindrical portion 51b and the protruding container lid 52, for example, high-frequency brazing, gas brazing, or the like is available. In addition, when both the rear cylindrical portion 51b and the protruding container lid 52 are formed of iron, the rear cylindrical portion 51b and the protruding container lid 52 can be joined by resistance welding or fusion welding. In addition, when one or both of the rear cylindrical portion 51b and the protruding container lid 52 are formed of an iron member and the iron member is subjected to a copper plating process, the strength of the protruding container 50 can be improved as compared with the case where both of the rear cylindrical portion 51b and the protruding container lid 52 are formed of a copper member.
Note that, here, the front cylindrical 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 cylindrical portion 51b is joined to the front cylindrical portion 51a, but the following steps may be performed. That is, after the rear cylindrical portion 51b is joined to the front cylindrical portion 51a to form the cylindrical portion 51, the front cylindrical portion 51a is joined to the closed casing 10. When the front cylindrical portion 51a is made of iron and the rear cylindrical portion 51b is made of copper, the cylindrical portion 51 can be configured by joining the front cylindrical portion 51a and the rear cylindrical portion 51b by, for example, furnace brazing.
[ operation of hermetic compressor 100]
Next, the operation of hermetic compressor 100 will be described with reference to fig. 1 and 2. When the rotary shaft 32 is rotated by the driving of the electric mechanism section 20, the rotary piston 33 in the cylinder 31 also rotates together with the rotary shaft 32 in the hermetic compressor 100. The rotary piston 33 eccentrically rotates in the cylinder chamber 31d, and the vane 35 having the tip end portion 35a in contact with the rotary piston 33 reciprocates by the rotation of the rotary piston 33. At this time, the gas refrigerant enters the cylinder chamber 31d from the suction port 34 of the compression mechanism 30 through the suction pipe 11. Then, as the rotary piston 33 rotates, the volume in the compression chamber 31d2 decreases, and the gas refrigerant in the cylinder chamber 31d is compressed.
In this compression step, the tip end 35a of the vane 35 abuts against the outer peripheral wall 33a of the rotary piston 33 by the biasing force of the spring 36. The vane 35 moves forward and backward in the vane groove 31e in accordance with the eccentric rotation of the rotary piston 33. At this time, the spring 36 is elastically deformed along the inner wall of the spring guide 40, and the elastic 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 casing 10 from a discharge port (not shown) provided in the upper bearing 38. The gas refrigerant circulating through the internal space of the closed casing 10 passes through the air holes (not shown) provided in the rotor 22 and the gap between the stator 21 and the rotor 22 to reach the upper portion of the inside of the closed casing 10, and is discharged from the discharge pipe 12 into the refrigerant circuit outside the closed casing 10.
As described above, hermetic compressor 100 according to embodiment 1 includes: a closed container 10; a hollow cylinder 31 housed in the closed casing 10; a rotary piston 33 that eccentrically rotates along the inner circumferential wall 31b of the cylinder 31; a vane 35 that reciprocates in a radial direction of the cylinder 31 in a vane groove 31e provided in the cylinder 31; and a spring 36 that biases the vane 35 toward the side where the rotary piston 33 is disposed. Hermetic compressor 100 further includes: a protruding container 50 that protrudes in the radial direction of the cylinder 31 on the opposite side of the cylinder 31 with respect to the sealed container 10, and has one end 40a that is joined to the sealed container 10 and communicates with the inside of the sealed container 10 to form a sealed space 50 e; and a spring guide 40 disposed in the sealed space 50e of the protrusion container 50 and having a spring 36 fixed therein. 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 and fixed to the insertion hole 31g of the cylinder 31.
In this way, the spring guide 40 is separately provided in the protrusion container 50, and the spring guide 40 is directly fixed to the cylinder 31. This ensures the positional accuracy of the spring 36 and the blade 35, as compared with a structure in which the spring 36 is housed in the protruding container 50 joined to the closed casing 10. Since the spring guide 40 is directly fixed to the cylinder 31, the spring guide 40 is the only member for attaching the spring 36 to the cylinder 31. From this point, the positional accuracy of the spring 36 and the blade 35 can be ensured. Further, since the spring 36 is accommodated in the protruding container 50, the arrangement space of the spring 36 is enlarged by the protruding container 50, and the expansion/contraction margin of the spring 36 can be secured as compared with a structure in which the protruding container 50 is not provided.
The hermetic compressor 100 according to embodiment 1 includes a plurality of cylinders 31, a plurality of spring guides 40 are fixed to the plurality of cylinders 31, and the plurality of spring guides 40 are collectively housed in the protruding container 50.
By configuring to collectively accommodate the plurality of spring guides 40 in the protruding container 50 in this manner, the manufacturing process of the hermetic compressor 100 can be simplified as compared with a configuration in which the plurality of spring guides 40 are individually accommodated in different protruding containers 50. That is, if the plurality of spring guides 40 are respectively housed in different protruding containers 50, a joining step of joining the protruding container 50 and the closed casing 10 is required for each spring guide 40 (step S1). In contrast, if the plurality of spring guides 40 are collectively housed in the projecting container 50, the joining step (step S1) may be performed once.
One end 50a of the protrusion container 50 is formed in a tapered shape, and the wall thickness thereof becomes thinner toward the closed container 10. Alternatively, the closed casing 10 has a through hole 10d to which the one end 50a of the protruding casing 50 is joined, and an end surface 50aa of the one end 50a of the protruding casing 50 is partially located inside the through hole 10d of the closed casing 10 when viewed in the axial direction of the protruding casing 50, and does not contact the entire surface of the closed casing 10.
This can reduce the contact width when joining the one end 50a of the protruding container 50 to the closed casing 10, and facilitate the joining by resistance welding.
The closed casing 10 has a ring 10e, the periphery of a through hole 10d to which one end 50a of the protruding casing 50 is joined is bent in a radial direction of the cylinder 31 so as to protrude toward a side opposite to the cylinder 31 with respect to the closed casing 10, and the protruding casing 50 is joined to one or both of an inner peripheral surface 10ea of the ring 10e and an inner wall surface 10aa of the closed casing 10.
This ensures a contact distance between the one end 50a of the protruding container 50 and the annular ring 10e, and enables favorable joining by brazing or welding.
The protruding container 50 has: a cylindrical portion 51 formed in a cylindrical shape, one end portion 50a of which is joined to the closed casing 10; and a protruding container lid 52 that closes the other end 50b of the cylindrical portion 51.
In this way, the protruding container 50 is constituted by the cylindrical portion 51 and the protruding container lid 52 that closes the other end 50b of the cylindrical portion 51, and the closed space 50e can be formed.
The cylindrical portion 51 of the protrusion container 50 is formed of two members divided in the axial direction of the cylindrical portion 51.
By having the structure in which the cylindrical portion 51 is divided in this way, the length in the axial direction 53 is shortened. Therefore, the worker can easily perform the work 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 method of manufacturing hermetic compressor 100 includes: a joining step of joining one end 50a of the cylindrical portion 51 to the through hole 10d of the sealed container 10 so as to protrude from the sealed container 10; and a cylinder fixing step of fixing the hollow cylinder 31 accommodating the rotary piston 33 in the closed casing 10. The method of manufacturing hermetic compressor 100 further includes: a vane disposing step of disposing the vanes 35 in the vane grooves 31e formed in the cylinder 31; and a spring guide fixing step of inserting and fixing the cylindrical spring guide 40 from the other end 50b of the cylindrical portion 51 to the cylinder 31. The method of manufacturing hermetic compressor 100 further includes: a spring mounting step of inserting the spring 36 that biases the vane 35 toward the arrangement side of the rotary piston 33 into the spring guide 40, bringing one end 36a of the spring 36 into contact with the vane 35, and fixing the other end 36b to the spring guide 40; and a closing step of joining the protruding container lid 52 to the other end 50b of the cylindrical portion 51 to close the inside of the cylindrical portion 51.
In this way, by joining the protrusion container 50 to the closed container 10 before the spring guide 40 and the spring 36 are attached to the closed container 10, the protrusion container 50 can be sealed while preventing thermal deformation of the spring guide 40 and the spring 36.
In the manufacturing method of the sealed compressor 100, in the sealing step (step S6), the cylindrical portion 51 and the protruding container lid 52 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. Alternatively, in the closing step (step S6), the cylindrical portion 51 and the protruding container lid 52 are joined by welding.
In this way, by joining the cylindrical portion 51 and the protruding container lid 52 by a joining method with low heat input, thermal deformation 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.
[ hermetic compressor 110]
Fig. 8 is a schematic vertical sectional view of the hermetic compressor according to embodiment 2. Parts having the same configuration as hermetic compressor 100 of fig. 1 to 7 are denoted by the same reference numerals. Items not specifically described in the hermetic compressor 110 according to embodiment 2 are described with the same reference numerals as those of the hermetic compressor 100 according to embodiment 1, and the same functions and structures are described.
In the hermetic compressor 100 according to embodiment 1, the number of the projecting containers 50 is always one regardless of the number of the cylinders 31 disposed in the hermetic container 10. In contrast, in the hermetic compressor 110 according to embodiment 2, the number of the projecting containers 50 varies depending on the number of the cylinders 31 disposed in the hermetic container 10. That is, the hermetic compressor 110 has the same number of protruding containers 50 as the number of cylinders 31.
Each of the projecting containers 50 accommodates one spring guide 40. For example, as shown in fig. 8, in the hermetic compressor 110 according to embodiment 2, the number of cylinders 31 disposed in the hermetic container 10 is two. In this case, the number of the protruding containers 50 engaged with the middle container 10a is also two. Of the two projecting containers 50, one projecting container 50 accommodates the spring guide 40 fixed to the upper cylinder 31A, and the other projecting container 50 accommodates the spring guide 40 fixed to the lower cylinder 31B.
Two through holes 10d1 and 10d2 are formed in the middle container 10a of the closed casing 10 so as to correspond to the two spring guides 40. One end 40a of each spring guide 40 is press-fitted into an outer peripheral insertion hole 31g2 of an insertion hole 31g of the cylinder 31 through each through hole 10d1, 10d2, as in embodiment 1. Further, each protruding container 50 is joined to each through hole 10d1 and 10d2 of the middle container 10a of the closed container 10 by resistance welding, brazing, welding, or the like, as in embodiment 1, thereby forming a closed space 50e.
As described above, the hermetic compressor 110 includes the plurality of cylinders 31, and the plurality of spring guides 40 are fixed to the plurality of cylinders 31. Further, the hermetic compressor 110 has a plurality of projecting containers 50 as many as the plurality of cylinders 31, and each of the plurality of projecting containers 50 accommodates one spring guide 40.
Thus, for example, even if the plurality of spring guides 40 have a configuration in which their respective fixing positions to the cylinder 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 embodiments 1 to 2, and various modifications can be made as follows.
For example, although the hermetic compressor 100 is a double-rotation type compressor having two cylinders 31 in the above description, it may be a single-rotation type compressor having one cylinder 31.
The cross-sectional shape of the insertion hole 31g formed in the cylinder 31 is not limited to a circular shape, and may be, for example, an insertion shape, an oblong shape, or a polygonal shape. In the case where the sectional shape of the insertion hole 31g is formed in an insertion shape, an oval shape, or a polygon shape, the sectional shape of the spring guide 40 is formed in an oval shape, or a polygon shape matching the sectional shape of the insertion hole 31g.
Embodiment 3.
Fig. 9 is a diagram showing a refrigerant circuit of the refrigeration cycle apparatus according to embodiment 3.
The refrigeration cycle device 60 includes a hermetic compressor 61, a condenser 62, an expansion valve 63 as a decompression device, and an evaporator 64. The hermetic compressor 61 is constituted by the hermetic compressor 100 of embodiment 1 or the hermetic compressor 110 of embodiment 2. The gas refrigerant discharged from the hermetic compressor 61 flows into the condenser 62, exchanges heat with air passing through the condenser 62 to become a high-pressure liquid refrigerant, and flows out. The high-pressure liquid refrigerant flowing out of the condenser 62 is decompressed by the expansion valve 63 to become a low-pressure gas-liquid two-phase refrigerant, and 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, and is again sucked into the hermetic compressor 61.
The refrigeration cycle device 60 configured as described above includes the sealed compressor 100 according to embodiment 1 or the sealed compressor 110 according to embodiment 2 as the sealed compressor 61, and thereby obtains stable operation of the vane 35 and the spring 36. This makes it possible to construct the refrigeration cycle device 60 with high reliability.
The refrigeration cycle apparatus 60 can be applied to an air conditioner, a refrigerator, a freezer, or the like.
Description of the reference numerals
Sealing the container; a middle container; inner wall surface; an upper vessel; a lower container; a through hole; 10d1.. 10d2.. a through hole; a loop; 10ea.. A suction tube; a suction tube; a suction tube; a discharge tube; an energy storage; a stand; an electric mechanism portion; a stator; a rotor; a compression mechanism portion; a cylinder body; an upper cylinder; 31b.. a lower cylinder; 31b.. an inner circumferential wall; a cylinder chamber; 31d1.. a suction chamber; a compression chamber; a vane slot; a peripheral wall; an insertion hole; 31g1.. inner peripheral side insertion hole; 31g2.. outer circumference side insertion hole; sealing the tube; a rotating shaft; an eccentric portion; a rotary piston; a peripheral wall; a suction hole; a discharge hole; a leaf; a front end portion; a back side end; a spring; an end portion; another end; a divider plate; an upper bearing; a lower bearing; a spring guide; one end; the other end; a bottom cover portion; projecting the container; one end portion; an end face; the other end; sealing the space; a cylindrical portion; a front cylindrical portion; one end portion; 51ab... the other end; a rear cylindrical portion; 51ba... one end; the other end; projecting a container lid; 53.. a shaft; a refrigeration cycle apparatus; 61.. hermetic compressor; a condenser; 63.. an expansion valve; an evaporator; a hermetic compressor; a hermetic compressor; a central axis.
Claims (13)
1. A hermetic compressor is characterized by comprising:
a closed container;
a hollow cylinder housed in the closed container;
a rotary piston that eccentrically rotates along an inner circumferential wall of the cylinder block;
a vane reciprocating in a vane groove provided in the cylinder in a radial direction of the cylinder;
a spring that urges the vane toward a side where the rotary piston is disposed;
a protruding container that protrudes in a radial direction of the cylinder toward a side opposite to the cylinder with respect to the closed container, and that has one end portion that is joined to the closed container and communicates with an inside of the closed container to form a closed space; and
a spring guide disposed in the sealed space of the protruding container and having the spring fixed therein,
an insertion hole is formed in an outer circumferential wall of the cylinder body,
the one end portion of the spring guide is inserted into and fixed to the insertion hole of the cylinder.
2. The hermetic compressor according to claim 1,
the hermetic compressor has a plurality of the cylinder blocks,
a plurality of the spring guides are fixed to a plurality of the cylinders,
the protruding container collectively accommodates a plurality of the spring guides.
3. The hermetic compressor according to claim 1,
the hermetic compressor has a plurality of the cylinder blocks,
a plurality of the spring guides are fixed to a plurality of the cylinders,
a plurality of said protruded containers having the same number as the number of said plurality of cylinders,
a plurality of the protruding receptacles each receive one of the spring guides.
4. The hermetic compressor according to any one of claims 1 to 3,
the one end portion of the protruding container is formed in a tapered shape, and the wall thickness thereof becomes thinner toward the closed container.
5. The hermetic compressor according to any one of claims 1 to 3,
the closed container has a through hole to which the one end of the protruding container is joined,
an end surface of the one end portion of the protruding container is partially located inside the through hole of the closed container without being in full contact with the closed container when viewed in an axial direction of the protruding container.
6. The hermetic compressor according to any one of claims 1 to 3,
the closed casing has a ring which bends a periphery of a through hole to which the one end of the protruding casing is joined so as to protrude in a radial direction of the cylinder toward a side opposite to the cylinder with respect to the closed casing,
the protruding container is joined to one or both of an inner peripheral surface of the annular ring and an inner wall surface of the closed container.
7. The hermetic compressor according to any one of claims 1 to 6,
the protruding container has:
a cylindrical portion formed in a cylindrical shape, one end portion of which is joined to the closed container; and
and a protruding container lid that closes the other end of the cylindrical portion.
8. The hermetic compressor according to claim 7,
the cylindrical portion of the protruding container is formed of two members divided in an axial direction of the cylindrical portion.
9. A refrigeration cycle apparatus, characterized in that,
a hermetic compressor according to any one of claims 1 to 8.
10. A method for manufacturing a hermetic compressor is characterized by comprising the following steps:
a joining step of joining one end of a cylindrical portion having both ends open to a through hole of a sealed container so as to protrude from the sealed container;
a cylinder fixing step of fixing a hollow cylinder accommodating a rotary piston in the closed container;
a vane disposing step of disposing vanes in vane grooves formed in the cylinder;
a spring guide fixing step of inserting a cylindrical spring guide from the other end of the cylindrical portion and fixing the spring guide to the cylinder,
a spring mounting step of inserting a spring that biases the vane toward the disposition side of the rotary piston into the spring guide, bringing one end portion of the spring into contact with the vane, and fixing the other end portion to the spring guide; and
and a sealing step of sealing the inside of the cylindrical portion by joining the protruding container lid to the other end portion of the cylindrical portion.
11. The manufacturing method of hermetic compressor according to claim 10, wherein the hermetic compressor further comprises a hermetic compressor having a hermetic compressor body,
in the closing step, the cylindrical portion and the protruding container lid are joined by resistance welding.
12. The manufacturing method of hermetic compressor according to claim 10, wherein the hermetic compressor further comprises a hermetic compressor having a hermetic compressor body,
in the closing step, the cylindrical portion and the protruding container lid are joined by brazing.
13. The manufacturing method of hermetic compressor according to claim 10, wherein the hermetic compressor further comprises a hermetic compressor having a hermetic compressor body,
in the closing step, the cylindrical portion and the protruding container lid are welded together.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2019/045600 WO2021100168A1 (en) | 2019-11-21 | 2019-11-21 | Sealed compressor, refrigeration cycle device, and sealed-compressor manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114667394A true CN114667394A (en) | 2022-06-24 |
Family
ID=75980478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980102197.0A Pending CN114667394A (en) | 2019-11-21 | 2019-11-21 | Sealed compressor, refrigeration cycle device, and method for manufacturing sealed compressor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7162757B2 (en) |
| CN (1) | CN114667394A (en) |
| CZ (1) | CZ2022180A3 (en) |
| WO (1) | WO2021100168A1 (en) |
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- 2019-11-21 CN CN201980102197.0A patent/CN114667394A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7162757B2 (en) | 2022-10-28 |
| CZ2022180A3 (en) | 2022-05-25 |
| WO2021100168A1 (en) | 2021-05-27 |
| JPWO2021100168A1 (en) | 2021-05-27 |
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