KR102427373B1 - Hermetic compressor and manufacturing method of hermetic compressor - Google Patents

Abstract

A hermetic compressor includes a hermetic container, a hollow cylinder accommodated in the hermetic container, a rolling piston rotating eccentrically, a vane dividing the space in the cylinder into a suction chamber and a compression chamber, a spring biasing the vane toward the arrangement side of the rolling piston, and an airtight container It protrudes from and forms a hollow part for accommodating the spring, and a cylindrical spring guide that defines the direction of expansion and contraction of the spring, protrudes from the sealed container, and forms a closed space at the same time as the sealed container, and the spring guide inside A protruding container for accommodating is provided, the cylinder is formed with an insertion hole into which a spring is inserted, and the spring guide has one end fixed to the cylinder and a hollow portion communicating with the insertion hole, the other end having a bottom It is closed by the cover part, and the spring is arrange|positioned between the back side end of the vane located on the opposite side to the rolling piston, and the bottom cover part.

Description

Hermetic compressor and manufacturing method of hermetic compressor

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

A conventional hermetic compressor includes a rotary compressor that compresses a refrigerant by a combination of a rotating piston and a cylinder. In this rotary compressor, a piston is accommodated in a cylinder, a vane urged by a spring contacts the piston, and constitutes a compression chamber in the cylinder. The spring biasing the vane is accommodated 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 gap between the vane back surface and the sealed container is narrow. Therefore, when the vane reaches the top dead center of the reciprocating motion, the entire length of the spring almost reaches the close contact length of the spring, the stress generated in the spring increases, and there is a fear that the spring may be fatigued. Then, in order to reduce the stress which generate|occur|produces in a spring, the hermetic type compressor which made the attachment space|interval of a spring long by providing a protruding container in an airtight container is proposed (for example, patent document 1). In addition, recently, the stroke volume of the hermetic compressor has been expanded, and since the expansion and contraction allowance of the spring for sliding the vane is limited, it is increasingly difficult to secure the expansion and contraction allowance of the spring for sliding the vane. is becoming important.

Japanese Patent Laid-Open No. 63-16189

The hermetic compressor of Patent Document 1 has a configuration in which a protruding container protruding from the hermetic container is provided, and a spring is disposed in the protruding container. However, in the hermetic compressor of Patent Document 1, if the assembling precision of the hermetic container and the cylinder is poor, the positional relationship between the spring and the vane may shift, for example, there is a risk that the spring may be twisted when the spring is expanded or contracted. There is a possibility that it will not expand and contract as designed.

The present invention is to solve the above problems, a hermetic compressor that secures the accuracy of the positional relationship between the spring and the vane while securing the elastic band of the spring for sliding the vanes used in the hermetic compressor, and a manufacturing method of the hermetic compressor will get

The hermetic compressor according to the present invention includes a hermetic container, a hollow cylinder accommodated in the hermetic container, a rolling piston eccentrically rotating along an inner peripheral wall of the cylinder, and an outer peripheral wall of the rolling piston in contact with A cylinder that forms a vane dividing the 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, and a hollow part that protrudes from the airtight container and accommodates the spring, and defines the direction of expansion and contraction of the spring A spring guide in the shape of a spring guide, protruding from the sealed container, forming a sealed space at the same time as the sealed container, having a protruding container for accommodating the spring guide therein, the cylinder is formed with an insertion hole into which the spring is inserted, As for the spring guide, one end is fixed to the cylinder, the hollow part communicates with the insertion hole, the other end is closed by the bottom cover part, and the spring is It is arrange|positioned between the back side edge part and a bottom cover part.

The hermetic compressor according to the present invention has a cylindrical spring guide that protrudes from the hermetically sealed container, forms a hollow part for accommodating the spring, and defines the expansion and contraction direction of the spring. One end of this spring guide is fixed to the cylinder, the hollow part and the spring insertion hole formed in the cylinder communicate with each other, and the other end is closed by the bottom cover part. The spring is disposed between the rear end of the vane positioned on the opposite side to the rolling piston and the bottom cover. Therefore, in the hermetic compressor, the spring is disposed between the rear end of the vane and the bottom cover portion of the spring guide protruding from the sealed container, so that the spring expandable and contractible rather than disposed between the rear end of the vane and the sealed container. can be obtained Further, in the hermetic compressor, by directly fixing the spring guide to the cylinder, the retaining part of the spring with respect to the cylinder becomes only the spring guide, and the positional accuracy between the spring and the vane can be secured.

1 is a longitudinal sectional view of a hermetic compressor according to 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 of Fig. 1;
3 is a flowchart illustrating a manufacturing process of the hermetic compressor of FIG. 1 .
Fig. 4 is a schematic cross-sectional view of a modified example of the protruding container shown in Fig. 2 .
5 is a longitudinal sectional view of a hermetic compressor according to Embodiment 2 of the present invention.

Hereinafter, the hermetic compressor 100 and the hermetic compressor 110 according to an embodiment of the present invention will be described with reference to drawings and the like. In addition, in the following drawings including FIG. 1, the relationship of the relative dimension of each structural member, a shape, etc. may differ from an actual thing. In addition, in the following drawings, the thing which attached|subjected the same code|symbol is the same or it corresponds to this, and it shall be common in the whole text of this specification. In addition, in order to facilitate understanding, terms indicating a direction (for example, "top", "bottom", "right", "left", "before", "after", etc.) are appropriately used, but their notation is explained For the sake of convenience, it is only described as such, and does not limit the arrangement and orientation of the device or component.

Embodiment 1

[hermetic compressor (100)]

1 is a longitudinal sectional view of a hermetic compressor 100 according to Embodiment 1 of the present invention. The hermetic compressor 100 is, for example, one of the elements constituting a refrigeration cycle used in an air conditioner, a refrigerator, a refrigerator, a vending machine, a hot water heater, and the like. The hermetic compressor 100 is a twin rotary compressor comprising two compression chambers. The hermetic compressor 100 has a hermetic container 10 , and a transmission mechanism portion 20 and a compression mechanism portion 30 accommodated in the hermetic container 10 . In addition, the hermetic compressor 100 has an accumulator 13 outside the hermetic container 10 , and has a suction pipe 11 connecting the hermetic container 10 and the accumulator 13 . In addition, the hermetic compressor 100 has a protruding container 50 for accommodating a spring 36 that biases a vane 35, which will be described later.

(closed container (10))

The hermetic container 10 constitutes the exterior of the hermetic compressor 100 . The hermetically sealed container 10 has a substantially cylindrical central container 10a, an upper container 10b that closes the upper opening of the central container 10a, and a lower container that closes the lower opening of the central container 10a ( 10c). In the sealed container 10, the upper container 10b is fitted into the upper opening of the central container 10a, and the lower container 10c is inserted into the lower opening of the central container 10a, so that the sealed state is maintained. The suction pipe 11 is connected to the central container 10a via the accumulator 13, and the discharge pipe 12 is connected to the upper container 10b. The suction pipe 11 is a connection pipe for feeding the gas refrigerant (low temperature and low pressure) sucked through the accumulator 13 into the compression mechanism unit 30 . The discharge pipe 12 is a connection pipe for discharging the gas refrigerant (high temperature and high pressure) in the sealed container 10 compressed by the compression mechanism part 30 to the outside of the sealed container 10 . The sealed container 10 is disposed on the pedestal 14 , and the lower container 10c is fixed to the pedestal 14 . In the hermetic compressor 100 , the pedestal 14 is fixed to the installation site by bolts or the like in a normal installation state.

(Electric mechanism part 20)

The electric mechanism part 20 generates the rotational motion which rotates the rotating shaft 32 in the inside of the sealed container 10. As shown in FIG. The transmission mechanism part 20 is arrange|positioned above the compression mechanism part 30 in the sealed container 10. The transmission mechanism part 20 is provided with the stator 21 fixed to the inner peripheral wall of the central container 10a, and the rotor 22 rotatably fitted to the inner peripheral side of the stator 21. As shown in FIG. The stator 21 is being fixed to the central container 10a of the sealed container 10 by various fixing methods, such as shrink-fitting and welding, for example. A rotating shaft 32 extending downward is fixed to the central portion 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 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 below the transmission mechanism part 20, and is being fixed to the central container 10a. The compression mechanism portion 30 has a cylinder 31 having a substantially cylindrical shape. The compression mechanism 30 also 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 .

The hermetic compressor (100) has at least one hollow cylinder (31) accommodated in the hermetic container (10) in the compression mechanism (30). As shown in FIG. 1 , the hermetic compressor 100 may have a plurality of cylinders 31 . That is, as shown in FIG. 1, the compression mechanism part 30 may be comprised with the some cylinder 31 of the upper cylinder 31A and the lower cylinder 31B. The cylinder 31 is a generic term for a plurality of cylinders such as the upper cylinder 31A and the lower cylinder 31B. In the sealed container 10, the substantially cylindrical upper cylinder 31A is arrange|positioned above the substantially cylindrical lower cylinder 31B. In the upper part of the upper cylinder 31A, an upper bearing 38 is disposed in contact with the upper end surface of the upper cylinder 31A, and the upper bearing 38 obstructs the upper end surface of the upper cylinder 31A. In the lower part of 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 blocks 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 A-A of the upper cylinder 31A in the compression mechanism portion 30 of FIG. 1 . However, Fig. 2 shows the cross section of the line A-A in a state rotated by 90 degrees counterclockwise. Hereinafter, the structure of the compression mechanism part 30 is further demonstrated using FIG.2 and FIG.1. In addition, the relationship between the rolling piston 33, the vane 35, and the spring 36 in the upper cylinder 31A, and the rolling piston 33 and the vane 35 in the lower cylinder 31B. And the relationship between the spring 36 is the same. Therefore, in the following description, the upper cylinder 31A and the lower cylinder 31B are not explained separately, but the cylinder 31 which is a generic name of the upper cylinder 31A and the lower cylinder 31B is demonstrated. In addition, illustration of the eccentric part 32a arrange|positioned in the cylinder 31 is abbreviate|omitted in FIG.

As shown in Fig. 2, the cylinder 31 has a peripheral wall section 31b formed in a cylindrical shape, and a cylinder chamber 31d concentric with the rotation shaft 32 is formed on the inner peripheral wall of the peripheral wall section 31b. (31b1) is formed. A rolling piston 33 is disposed inside the circumferential wall portion 31b, and the inner circumferential wall 31b1 of the circumferential wall portion 31b faces the outer circumferential wall 33a of the rolling piston 33 formed in a cylindrical shape. In the circumferential wall portion 31b of the cylinder 31, a vane groove 31e is formed in a radial direction from the inner circumferential wall 31b1 to the outer circumferential wall 31f side. In this vane groove 31e, a vane 35 is slidably disposed. The cylinder chamber 31d is divided by a vane 35 into a suction chamber 31d1 passing through the suction hole 34 and a compression chamber 31d2 passing through 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 . do.

In the circumferential wall portion 31b of the cylinder 31, between the vane groove 31e and the outer circumferential wall 31f of the cylinder 31, an insertion hole 31g into which the spring 36 is inserted is provided. formed along the radial direction of A spring 36 for biasing 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 has an outer peripheral side insertion hole 31g2 formed on the outer peripheral wall 31f side of the cylinder 31, and an inner peripheral wall 31b1 side of the cylinder 31, that is, formed on the vane groove 31e side. It has an inner peripheral side insertion hole 31g1. The cross-sectional shapes of the outer peripheral side insertion hole 31g2 and the inner peripheral side insertion hole 31g1 are both circular. When the diameter of the outer peripheral side insertion hole 31g2 is φD and the diameter of the inner peripheral side insertion hole 31g1 is φd, φd is smaller than φD (φd < φD). That is, the insertion hole 31g faces the inner peripheral wall 31b1 side from the outer peripheral wall 31f side of the cylinder 31, and has a plurality of portions having different diameters in the central axial direction of the insertion hole 31g. 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 side. The central axis of the outer peripheral side insertion hole 31g2 and the central axis of the inner peripheral side insertion hole 31g1 are coaxial, and both central axes intersect the central axis C of the rotating shaft 32 extending perpendicularly to the paper surface.

In the circumferential wall portion 31b of the cylinder 31, suction holes 34 and discharge holes 34B are formed on both sides with a vane groove 31e therebetween 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. In addition, the suction pipe 11 mentioned above 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 31b1 of the cylinder 31, and through the discharge hole (not shown) formed in the upper bearing 38, the space in the sealed container 10 and is connected

As shown in FIG. 1, the rotating shaft 32 has the eccentric part 32a eccentric in one radial direction on the one end side of an axial direction. In addition, as for the rotating shaft 32, the other end side of the axial direction is inserted and fixed in the center of the rotor 22 of the transmission mechanism part 20. As shown in FIG. The rotating shaft 32 is rotatably supported by an upper bearing 38 and a lower bearing 39 , and rotates simultaneously with the rotor 22 .

The hermetic compressor 100 has, in the compression mechanism part 30, the rolling piston 33 which rotates eccentrically along the inner peripheral wall 31b1 of the cylinder 31, as shown in FIG.1 and FIG.2. The rolling piston 33 is in an eccentric position with respect to the central axis C of the rotating shaft 32, and the eccentric portion 32a of the rotating shaft 32 in the cylinder chamber 31d so as to rotate simultaneously with the rotating shaft 32. is mounted on 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 part 30, and the space in the cylinder 31 is absorbed into the suction chamber ( 31d1) and a vane 35 divided into a compression chamber 31d2. The tip portion 35a of the vane 35 is brought into contact with the outer peripheral wall 33a of the rolling piston 33 by the biasing 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 has, in the compression mechanism part 30 , a spring 36 urging the vane 35 to the side where the rolling piston 33 is disposed. As shown in FIG. 2 , the spring 36 is disposed at the rear end 35b of the vane 35 located on the opposite side to the rolling piston 33 in the radial direction of the cylinder 31 . In addition, the spring 36 is accommodated in a spring guide 40 to be described later. The spring 36 is slidably disposed in the hollow portion 40e of the spring guide 40 . The spring 36 is a compression coil spring using a reaction force by compression, and is a cylindrical coil spring. In addition, although the spring 36 is preferably a cylindrical coil spring, it is not limited to a cylindrical coil spring. Since the spring 36 is guided by the spring guide 40, in the free longitudinal direction of the spring 36, a spring having the same coil outer diameter is preferable. Therefore, for example, if the spring guide 40 has a vertical cross section and is an elliptical shape, an elliptical coil spring may be used for the spring 36 . As for the spring 36, one end 36b in the free longitudinal direction is fixed to the bottom cover portion 40c of the spring guide 40, and the other end 36a is the rear end 35b of the vane 35. ) is mounted on That is, the spring 36 is disposed between the rear end 35b of the vane 35 located on the opposite side to the rolling piston 33 and the bottom cover portion 40c of the spring guide 40 .

As shown in FIGS. 1 and 2, the hermetic compressor 100 protrudes from the hermetic container 10 in the compression mechanism part 30 and forms a hollow part 40e for accommodating the spring 36, , has a cylindrical spring guide 40 that defines the expansion and contraction direction of the spring 36 . The spring guide 40 is a cylindrical member for accommodating the spring 36 therein. One end 40a of the spring guide 40 is inserted into an insertion hole 31g formed in the outer peripheral wall 31f of the cylinder 31 and is fixed to the cylinder 31 . More specifically, one end 40a of the spring guide 40 is inserted into the outer peripheral side insertion hole 31g2 of the insertion hole 31g and is fixed to the cylinder 31 . A spring guide 40 is 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 to face the stepped surfaces of 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 press-fitted into the outer peripheral side insertion hole 31g2 of the cylinder 31, and is fixed, for example. More specifically, for example, the sealing tube 31h is press-fitted into the outer peripheral side insertion hole 31g2 of the cylinder 31 . The seal tube 31h is a cylindrical tube. The outer diameter of the sealing tube 31h is larger than the inner diameter of the outer peripheral side insertion hole 31g2 in the state before the sealing tube 31h is press-fitted into the outer peripheral side insertion hole 31g2. Further, the end portion 40a of the spring guide 40 is press-fitted into the seal tube 31h. The outer diameter of the spring guide 40 is larger than the inner diameter of the seal tube 31h in a state 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 communicates with the inner peripheral side insertion hole 31g1 of the insertion hole 31g formed in the cylinder 31 . At this time, it is preferable that the inner diameter of the hollow part 40e and the inner diameter of the inner peripheral side insertion hole 31g1 coincide. The spring guide 40 has a bottom cover portion 40c disposed at the other end 40b, and the opening of the hollow portion 40e on the end 40b side is closed by the bottom cover portion 40c. . This spring guide 40 is accommodated in the protruding container 50 .

The spring guide 40 has an inner wall along the coil outer diameter of the spring 36 . The spring guide 40 may have, for example, an inner wall having a circular cross-sectional shape if the spring 36 is a cylindrical coil spring, and may have an inner wall having an elliptical cross-sectional shape if the spring 36 is an elliptical coil spring. The spring guide 40 regulates the movement in the radial direction of the spring 36 so that the shift of the axis of the spring 36 does not become large. Since the spring guide 40 regulates the movement of the spring 36 in the radial direction, it is preferable to have a shape in which the inner diameter of the spring guide 40 is slightly larger than the outer diameter of the coil of the spring 36 . That is, it is preferable that the interval between the inner wall of the spring guide 40 and the outer diameter of the coil of the spring 36 is smaller. The spring 36 can prevent torsion by being guided to the inner wall of the spring guide 40 during expansion and contraction.

Since the vane 35 disposed in the vane groove 31e slides along the inner wall of the cylinder 31, as the number of parts holding the spring 36 with respect to the cylinder 31 increases, the spring 36 and It becomes difficult to ensure the positional accuracy between the vanes 35. By directly fixing the spring guide 40 to the cylinder 31 , the component that holds the spring 36 with respect to the cylinder 31 becomes only the spring guide 40 , and between the spring 36 and the vane 35 . position accuracy can be ensured.

As shown in Figure 1, in order to bond the spring guide 40 and the upper cylinder 31A, the central container 10a of the sealed container 10 has a diameter of at least the size of the outer diameter of the spring guide 40. A through hole having a through hole is formed. Similarly, a through hole having a diameter equal to the outer diameter of the spring guide 40 at least is formed in the central container 10a of the closed container 10 so that the spring guide 40 and the lower cylinder 31B can be joined. has been Alternatively, in order to bond the spring guide 40 and the upper cylinder 31A, and to bond the spring guide 40 and the lower cylinder 31B to the central container 10a of the sealed container 10, One through hole may be formed.

As shown in FIGS. 1 and 2 , the hermetic compressor 100 protrudes from the hermetic container 10 , is joined to the hermetic container 10 , and forms a closed space at the same time as the hermetic container 10 , and It has a protruding container (50) for accommodating the spring guide (40). The protruding container 50 has a cylindrical portion 51 and a protruding container cover 52 . The cylindrical portion 51 is a member formed in a cylindrical shape for accommodating the spring guide 40 in the hollow portion 50e. One end 50a of the cylindrical portion 51 of the protruding container 50 is being fixed to the central container 10a of the sealed container 10 . In addition, the protruding container cover 52 is arrange|positioned at the other end 50b of the cylindrical part 51 of the protruding container 50. As shown in FIG. The protruding container lid 52 closes the end 50b located on the opposite side to the sealed container 10 and the fixed side of the cylindrical portion 51 . As for the cylindrical part 51, the opening of the hollow part 50e on the side of the edge part 50b is blocked by the protruding container lid 52. As shown in FIG.

As shown in FIG. 1, the protruding container 50 has a spring guide 40 fixed to the upper cylinder 31A and a spring guide 40 fixed to the lower cylinder 31B also has a cylindrical portion 51. It is accommodated in the hollow part (50e) of. That is, the protruding container 50 includes a plurality of spring guides 40 of the spring guide 40 fixed to the upper cylinder 31A and the spring guide 40 fixed to the lower cylinder 31B into one protruding container ( 50) to be accommodated. In the protruding container 50 , the inner space surrounded by the cylindrical portion 51 , the protruding container cover 52 , the cylinder 31 and the spring guide 40 is an enclosed space. Alternatively, the protruding container 50 has an inner space surrounded by the cylindrical portion 51 , the protruding container cover 52 , the cylinder 31 , the spring guide 40 , and the central container 10a as a closed space. has been

3 is a flowchart illustrating a manufacturing process of the hermetic compressor 100 of FIG. 1 . The mounting of the protruding container 50 to the sealed container 10 is preferably performed in the following order. When the mounting process of the protruding container 50 to the sealed container 10 is started, the cylindrical portion ( 51) is performed (step S1). Next, the cylinder fixing process of fixing the hollow cylinder 31 in which the rolling piston 33 is accommodated in the central container 10a of the sealed container 10 is performed (step S2). Next, a vane arranging process of arranging the vanes 35 in the vane grooves 31e formed in the cylinder 31 is executed (step S3). Next, from the hollow portion 50e of the cylindrical portion 51, the cylindrical spring guide 40 defining the expansion and contraction direction of the spring 36 that biases the vane 35 toward the arrangement side of the rolling piston 33 The spring guide fixing process of inserting and fixing to the cylinder 31 is performed (step S4). Next, the spring 36 is inserted into the spring guide 40 , and one end of the spring 36 is brought into contact with the vane 35 to fix the other end to the bottom cover portion 40c of the spring guide 40 . The process is executed (step S5). Finally, sealing the inside of the cylindrical portion 51 by bonding the end 50b located on the opposite side to the side on which the sealed container 10 of the cylindrical portion 51 is mounted, and the protruding container cover 52 . The occlusion process is executed (step S6). By going through the processes of steps S1 to S6, the process of attaching the protruding container 50 to the sealed container 10 is completed. By carrying out the mounting of the protruding container 50 to the sealed container 10 as described above, thermal strain of the spring guide 40 and the spring 36 is prevented, and the inside of the protruding container 50 is removed. can be sealed.

In the joining process (step S1), the cylindrical part 51 of the protruding container 50 and the central container 10a of the sealed container 10 are resistance welded by making the protruding container 50 an iron member. can be joined by In the closing process (step S6), the cylindrical part 51 comprised from the iron member, and the protruding container lid 52 comprised from the iron member are joined by resistance welding, for example. Alternatively, in the closing step (step S6), for example, the protruding container cover 52 is made of a copper member or a copper-plated iron member, whereby the cylindrical portion 51 and the protruding container cover 52 are formed. ) are joined by brazing. Brazing is performed, for example, 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. 2 . As shown in FIG. 4, the cylindrical part 51 can be comprised in the structure divided into 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 for accommodating the spring guide 40 in the hollow portion 50e. As for the front cylindrical part 51a of the protruding container 50, one end 50a is fixed to the central container 10a of the sealed container 10, and the rear cylindrical part is fixed to the other end 50c. The end 50d of 51b is fitted and connected. The front cylindrical part 51a is formed in the shape where the thickness of the peripheral wall becomes thin toward the edge part 50a, and the front-end|tip is thin. As for the rear cylindrical part 51b of the protruding container 50, one end 50b is fitted and connected with the end 50c of the front cylindrical part 51a, and the other end 50b is connected. A protruding container lid 52 is disposed. As for the rear cylindrical part 51b of the protruding container 50, the opening of the hollow part 50e on the side of the edge part 50b is blocked by the protruding container lid 52. As shown in FIG.

In the joining process (step S1), by making the front cylindrical part 51a an iron member, the front cylindrical part 51a of the protruding container 50 and the central container 10a of the sealed container 10 are , can be joined by resistance welding. In the closing step (step S6), the rear cylindrical portion 51b and the projecting container lid 52 of the projecting container 50 have the rear cylindrical portion 51b and the projecting container cover 52 as a copper member. It can be joined by brazing. As a brazing method for joining the rear cylindrical part 51b and the protruding container lid 52, there are high frequency brazing or gas brazing, for example. The front cylindrical part 51a and the rear cylindrical part 51b use the front cylindrical part 51a as an iron member and the rear cylindrical part 51b as a copper member, for example, It can be joined by soldering (furnace brazing) or the like. In addition, either or both of the rear cylindrical portion 51b and the protruding container lid 52 are made of an iron member, and copper plating is applied to the iron member, thereby protruding from the rear cylindrical portion 51b. The intensity|strength of the protruding container 50 can be raised compared with the case where both sides of the container lid 52 are made into a copper member. In addition, when both the rear cylindrical part 51b and the protruding container lid 52 are made into an iron member, the rear cylindrical part 51b and the protruding container lid 52 can also be joined by resistance welding.

[Operation of the 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 the driving of the electric mechanism unit 20 , the rolling piston 33 in the cylinder 31 also rotates simultaneously with the rotating shaft 32 . The rolling piston 33 rotates eccentrically, and the vane 35 slidably contacted to the rolling piston 33 moves by the rotation of the rolling piston 33 . At this time, the gas refrigerant passes through the suction pipe 11 from the suction hole 34 of the compression mechanism part 30 to the cylinder chamber surrounded by the inner peripheral wall 31b1 of the cylinder 31, the rolling piston 33, and the vanes 35. (31d) enters. Then, the gas refrigerant in the cylinder chamber 31d is compressed as the volume in the compression chamber 31d2 decreases with the rotation of the rolling piston 33 .

In the compression step of the compression mechanism portion 30 , the tip portion 35a of the vane 35 is in contact with the outer peripheral wall 33a of the rolling piston 33 by the biasing force of the spring 36 . And, the vane 35 slides in the radial direction of the cylinder 31 in the vane groove 31e with the eccentric rotation of the rolling piston 33 . At this time, the spring 36 is elastically deformed along the inner wall of the spring guide 40 , and the extension 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 inner space of the sealed container 10 from a discharge port (not shown) provided in the upper bearing 38 . 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. It 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 protrudes from the hermetic container 10 , and forms a hollow portion 40e accommodating the spring 36 , and a cylindrical spring guide defining the expansion and contraction direction of the spring 36 . (40). The spring guide 40 has one end 40a fixed to the cylinder 31, and the hollow portion 40e and the insertion hole 31g of the spring 36 formed in the cylinder 31 communicate with each other. , the other end 40b is closed by the bottom cover portion 40c. In addition, the spring 36 includes the rear end 35b of the vane 35 positioned on the opposite side to the rolling piston 33 and the bottom cover portion 40c of the spring guide 40 protruding from the sealed container 10 . ) are placed between The spring 36 of the hermetic compressor 100 is disposed between the rear end 35b of the vane 35 and the bottom cover portion 40c of the spring guide 40 protruding from the hermetic container 10 . Accordingly, it is possible to secure an expansion and contraction band rather than being disposed between the rear end portion 35b and the sealed container 10 . Further, in the hermetic compressor 100, by directly fixing the spring guide 40 to the cylinder 31, the holding part between the cylinder 31 and the spring 36 becomes only the spring guide 40, and the spring ( 36) and the positional accuracy between the vane 35 can be secured.

In addition, the hermetic compressor 100 has a plurality of cylinders 31 , and a plurality of spring guides 40 are respectively fixed to the plurality of cylinders 31 , and the protruding container 50 includes a plurality of spring guides 40 . ) is accepted. By accommodating the plurality of spring guides 40 in the protruding container 50, the bonding process (step S1) only needs to be performed once, and compared with the case where the bonding process is provided for each spring guide 40, the hermetic compressor ( 100) can simplify the manufacturing process.

In addition, the protruding container 50 is formed in a cylindrical shape and is located on the opposite side to the cylindrical part 51 fixed to the sealed container 10 and the sealed container 10 and the fixed side of the cylindrical part 51 . It has a protruding container cover 52 that closes the end 50b. By attaching the spring guide 40 and the spring 36 from the cylindrical portion 51 fixed to the sealed container 10, and then closing the cylindrical portion 51 with the protruding container cover 52, It is possible to prevent thermal deformation of the spring guide 40 and the spring 36 , and seal the inside of the protruding container 50 .

Further, the tubular portion 51 includes a front tubular portion 51a fixed to an airtight container, and a rear tubular portion 51b fitted with the front tubular portion 51a, in which the protruding container lid 52 is disposed. has When the cylindrical portion 51 is divided, the length of the wall in the axial direction is shortened, and the operator performs the joining step (step S1), the cylinder fixing step (step S2), the spring guide fixing step (step S4), and the spring mounting step. It becomes easy to work in each process of (step S5).

In addition, the manufacturing method of the hermetic compressor 100 includes a joining process (step S1), a cylinder fixing process (step S2), a vane arrangement process (step S3), a spring guide fixing process (step S4), and a spring mounting process (Step S5) and a blocking process (Step S6). The operator prevents thermal deformation of the spring guide 40 and the spring 36 by performing the attachment of the protruding container 50 to the hermetic container 10 as described above, and seals the inside of the protruding container 50 . can do.

In the method for manufacturing 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 the 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. When the cylindrical portion 51 and the protruding container cover 52 are joined by a low heat input joining method, thermal deformation of the spring guide 40 and the spring 36 is prevented, and the protruding container 50 is can be sealed.

Embodiment 2

5 is a longitudinal cross-sectional view of the hermetic compressor 110 according to Embodiment 2 of the present invention. Parts having the same configuration as those of the hermetic compressor 100 of FIGS. 1 to 4 are given the same reference numerals and a description thereof will be omitted. Items not specifically described in the hermetic compressor 110 according to the second embodiment are the same as in the hermetic compressor 100 according to the first embodiment of the present invention, and the same functions and configurations are described using the same reference numerals. do.

In the hermetic compressor 100 according to the first embodiment, the number of the protruding containers 50 fixed to the central container 10a is always one regardless of the number of cylinders 31 arranged in the hermetic container 10 . In contrast, in the hermetic compressor 110 according to the second embodiment, the number of protruding containers 50 fixed to the central container 10a changes according to the number of cylinders 31 arranged in the hermetic container 10 . . That is, the hermetic compressor 110 has a plurality of protruding containers 50 equal to the number of the plurality of cylinders 31 . And, each of the plurality of protruding containers 50 accommodates one spring guide 40 . For example, as shown in FIG. 5 , in the hermetic compressor 110 according to the second embodiment, the number of cylinders 31 arranged in the hermetic container 10 is that of the upper cylinder 31A and the lower cylinder 31B. In the case of two, the number of the protruding containers 50 fixed to the central container 10a is also two. And, in the two protruding containers 50 , the spring guide 40 fixed to the upper cylinder 31A is accommodated in one of the protruding containers 50 , and the lower cylinder is accommodated in the other protruding container 50 . A spring guide 40 fixed to 31B is accommodated.

As described above, the hermetic compressor 110 has a plurality of cylinders 31 , and a plurality of spring guides 40 are respectively fixed to the plurality of cylinders 31 . And, the hermetic compressor 110 has a plurality of protruding containers 50 equal to the number of the plurality of cylinders 31 , and each of the plurality of protruding containers 50 accommodates one spring guide 40 . do. By accommodating one spring guide 40 in each of the plurality of protruding containers 50, for example, even if the fixing positions of the cylinders 31 of the plurality of spring guides 40 are different in the circumferential direction, respectively. , it is possible to form a closed space for each spring (36).

In addition, embodiment of this invention is not limited to the said Embodiment 1-2, A various change can be added. For example, in the hermetic compressor 100 and the hermetic compressor 110, the cylinder 31 described two twin rotary compressors, but the hermetic compressor 100 and the hermetic compressor 110 are one cylinder. A single rotary compressor having (31) may be used. In the hermetic compressor 100, the insertion hole 31g has a circular cross-sectional shape, but the insertion hole 31g has, for example, an elliptical shape, an oval shape, or a polygonal shape. may be formed. 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, and a polygonal shape according to the cross-sectional shape of the insertion hole 31g.

10: airtight container 10a: central container
10b: upper container 10c: lower container
11: suction pipe 11A: suction pipe
11B: suction pipe 12: discharge pipe
13: accumulator 14: pedestal
20: electric mechanism 21: stator
22: rotor 30: compression mechanism
31: cylinder 31A: upper cylinder
31B: lower cylinder 31b: peripheral wall part
31b1: inner peripheral wall 31d: cylinder chamber
31d1: suction chamber 31d2: compression chamber
31e: vane groove 31f: outer wall
31g: insertion hole 31g1: inner peripheral side insertion hole
31g2: outer peripheral side insertion hole 31h: seal tube
32: axis of rotation 32a: eccentric
33: rolling piston 33a: outer peripheral wall
34: suction hole 34B: discharge hole
35: vane 35a: tip
35b: rear end 36: spring
36a: end 36b: end
37: partition plate 38: upper bearing
39: lower bearing 40: spring guide
40a: end 40b: end
40c: bottom cover part 40e: hollow part
50: projecting container 50a: end
50b: end 50c: end
50d: end 50e: hollow
51: cylindrical portion 51a: front cylindrical portion
51b: rear cylindrical portion 52: projecting container cover
100: hermetic compressor 110: hermetic compressor

Claims (8)

sealed container,
a hollow cylinder accommodated in the sealed container;
a rolling piston eccentrically rotating along an inner peripheral wall of the cylinder;
a vane in contact with an outer peripheral wall of the rolling piston and dividing a space in the cylinder into a suction chamber and a compression chamber;
a spring for biasing the vane toward the arrangement side of the rolling piston;
A cylindrical spring guide that protrudes from the airtight container and forms a hollow portion for accommodating the spring, and defines the expansion and contraction direction of the spring;
A protruding container that is directly fixed to the sealed container so as to protrude from the sealed container, forms a closed space with the sealed container, accommodates the spring guide therein, and forms a space between the spring guide provided,
An insertion hole into which the spring is inserted is formed in the cylinder,
In the spring guide, one end is fixed to the cylinder, the hollow portion communicates with the insertion hole, and the other end is closed by the bottom cover portion,
The spring is disposed between the rear end of the vane positioned on the opposite side to the rolling piston and the bottom cover portion.
hermetic compressor. The method of claim 1,
having a plurality of said cylinders,
A plurality of the spring guides are fixed to each of the plurality of cylinders,
The protruding container is configured to accommodate a plurality of the spring guides.
hermetic compressor. The method of claim 1,
having a plurality of said cylinders,
A plurality of the spring guides are fixed to each of the plurality of cylinders,
a plurality of said protruding vessels equal to the number of said plurality of cylinders;
A plurality of the protruding container each accommodates one of the spring guides
hermetic compressor. 4. The method according to any one of claims 1 to 3,
The protruding container,
A cylindrical portion formed in a cylindrical shape and fixed to the sealed container;
and a protruding container cover for closing the end located on the opposite side to the side to which the tubular portion is fixed to the sealed container.
hermetic compressor. 5. The method of claim 4,
The cylindrical part,
And a front cylindrical portion to be fixed to the sealed container,
It is fitted with the front cylindrical portion and has a rear cylindrical portion on which the protruding container cover is disposed.
hermetic compressor. A bonding step of bonding a cylindrical portion formed in a cylindrical shape protruding from the hermetically sealed container to a closed container constituting the outer periphery;
A cylinder fixing process of fixing the hollow cylinder in which the rolling piston is accommodated in the sealed container;
A vane arrangement process of arranging vanes in the vane grooves formed in the cylinder;
A spring guide fixing step of inserting a cylindrical spring guide defining an expansion and contraction direction of the spring that biases the vane toward the arrangement side of the rolling piston from the hollow portion of the cylindrical portion and fixing to the cylinder;
a spring mounting process of inserting the spring into the spring guide, bringing one end of the spring into contact with the vane, and fixing the other end to the spring guide;
and a closing step of sealing the inside of the cylindrical portion by joining an end positioned on the opposite side to the side fixed to the sealed container of the cylindrical portion and a protruding container cover.
A method for manufacturing a hermetic compressor. 7. The method of claim 6,
In the occlusion process,
The cylindrical portion made of an iron member and the protruding container cover made of an iron member are joined by resistance welding.
A method for manufacturing a hermetic compressor. 7. The method of claim 6,
In the occlusion process,
The tubular portion and the protruding container cover are joined by brazing.
A method for manufacturing a hermetic compressor.

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