CN115243821B

CN115243821B - Method for manufacturing hermetic compressor

Info

Publication number: CN115243821B
Application number: CN202080093836.4A
Authority: CN
Inventors: 井垣夏纪; 赤堀康之
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2023-09-22
Anticipated expiration: 2040-02-28
Also published as: CN115243821A; WO2021171583A1; JP7209894B2; JPWO2021171583A1

Abstract

A method for manufacturing a hermetic compressor having a hermetic container which has a container body (31) and a protruding container (35) protruding from the container body to the outside. When the container body and the protruding container are connected, the container body and the protruding container are held between a first electrode (61) in contact with the protruding container and a second electrode (62) in contact with the container body, and electricity is caused to flow between the first electrode and the second electrode in a state in which an electricity-conducting auxiliary jig (50) made of a material having higher conductivity than the protruding container is brought into contact with the outer peripheral portion of the protruding container, whereby the container body and the protruding container are connected by resistance welding.

Description

Method for manufacturing hermetic compressor

Technical Field

The present disclosure relates to a method for manufacturing a hermetic compressor in which a spring for pushing a vane is housed in a hermetic container.

Background

The compression mechanism of the hermetic rotary compressor comprises: a cylinder body having a space formed therein, the space being a compression chamber; a vane slidably provided in a groove formed in the cylinder and partitioning a space formed in the cylinder; and a spring that urges the blade toward the space. In addition, the hermetic rotary compressor accommodates a compression mechanism in a hermetic container. Conventionally, a closed container includes a container body having a substantially cylindrical shape. In addition, in the conventional hermetic rotary compressor, a cylinder, a vane, and a spring are accommodated in a container body.

In recent years, as the stroke volume of a hermetic rotary compressor increases, the space for installing a spring becomes smaller, and it is sometimes difficult to secure the expansion and contraction margin of the spring. Accordingly, in a conventional hermetic rotary compressor, a hermetic container is proposed that includes a protruding container, and a part of a spring is accommodated in the protruding container (for example, refer to patent document 1). Specifically, the protruding container is welded to the container body and protrudes outward of the container body. The container body accommodates a cylinder and a vane. In addition, a part of the spring is accommodated in the container body, and the remaining part is accommodated in the protruding container. This ensures a larger installation space for the spring and a margin for expansion and contraction of the spring, as compared with a case where the spring is accommodated only in the container body.

Patent document 1: japanese patent laid-open No. 63-16189

When the container body and the protruding container of the sealed container are connected by resistance welding, the container body and the protruding container are sandwiched between a pair of electrodes and pressurized, and in this state, electricity is caused to flow between the pair of electrodes, whereby the contact portion between the container body and the protruding container is welded. However, since the distance between the pair of electrodes sandwiching the container body and the protruding container becomes longer, the current at the contact portion of the container body and the protruding container decreases. Therefore, in the conventional hermetic compressor including the hermetic container having the protruding container, when the container body and the protruding container are connected by resistance welding, a welding failure may occur at the contact portion between the container body and the protruding container. As a result, in the conventional hermetic compressor including the hermetic container having the protruding container, there is a problem that the air tightness of the connection portion between the container body and the protruding container is lowered, and the refrigerant leaks from the connection portion between the container body and the protruding container.

Disclosure of Invention

The present disclosure has been made to solve the above-described problems, and an object of the present disclosure is to provide a method for manufacturing a hermetic compressor that can suppress a decrease in the air tightness of a connection portion between a container body and a protruding container as compared with the conventional one.

In the method for manufacturing a hermetic compressor of the present disclosure, the hermetic compressor includes a hermetic container that accommodates: a cylinder body having a space formed therein, the space being a compression chamber, a vane slidably provided in a groove formed in the cylinder body and partitioning the space, and a spring for pressing the vane toward the space, wherein the closed container comprises: a container body that accommodates the cylinder and the vane; and a protruding container welded to the container body, protruding to the outside of the container body, and accommodating a part of the spring, wherein the container body and the protruding container are sandwiched between a first electrode in contact with the protruding container and a second electrode in contact with the container body, and wherein electricity is caused to flow between the first electrode and the second electrode in a state in which an electricity-conducting auxiliary jig made of a material having higher conductivity than the protruding container is brought into contact with the outer peripheral portion of the protruding container, and wherein the container body and the protruding container are connected by resistance welding.

In the method for manufacturing a hermetic compressor of the present disclosure, electricity flowing between the first electrode and the container body mainly flows in the auxiliary energizing jig in a range where the auxiliary energizing jig made of a material having higher conductivity than the protruding container is provided. The electricity flowing between the first electrode and the container body flows through the protruding container in a range where the energizing auxiliary jig is not provided. Therefore, in the method for manufacturing the hermetic compressor of the present disclosure, the length of the path flowing only in the protruding container can be reduced in the electrical path flowing between the first electrode and the container body. Therefore, in the method for manufacturing a hermetic compressor of the present disclosure, it is possible to suppress a decrease in current at the contact portion between the container body and the protruding container, as compared with the conventional case. Therefore, in the method for manufacturing a hermetic compressor of the present disclosure, it is possible to suppress occurrence of welding failure at the contact portion between the container body and the protruding container as compared with the conventional one, and it is possible to suppress lowering of the air tightness of the connection portion between the container body and the protruding container as compared with the conventional one.

Drawings

Fig. 1 is a longitudinal sectional view showing a hermetic compressor according to the present embodiment.

Fig. 2 is a cross-sectional view showing the sealed container according to the present embodiment.

Fig. 3 is a diagram for explaining a method of connecting a container body and a protruding container by conventional resistance welding.

Fig. 4 is a flowchart for explaining a method of connecting a container body and a protruding container by resistance welding according to the present embodiment.

Fig. 5 is a view showing a state in which the energizing auxiliary jig is attached to the protruding container of the hermetic compressor of the present embodiment.

Fig. 6 is a cross-sectional view A-A of fig. 5.

Fig. 7 is a diagram for explaining a method of connecting a container body and a protruding container by resistance welding according to the present embodiment.

Detailed Description

Description of the embodiments

Fig. 1 is a longitudinal sectional view showing a hermetic compressor according to the present embodiment. Fig. 2 is a cross-sectional view showing the sealed container according to the present embodiment. Fig. 2 is a view of the hermetic compressor 100 cut at the position of the compression mechanism 20.

The hermetic compressor 100 of the present embodiment is a rotary compressor, and includes a motor 1, a compression mechanism 20, and a drive shaft 10. The drive shaft 10 connects the motor 1 to the compression mechanism 20. The hermetic compressor 100 of the present embodiment includes a hermetic container 30. The motor 1, the compression mechanism 20, and the drive shaft 10 are housed in a sealed container 30.

The motor 1 includes: a stator 2 fixed to the closed casing 30, and a rotor 3 rotated by a magnetic force generated by the stator 2.

The drive shaft 10 is connected to the rotor 3 of the motor 1 and the compression mechanism 20, and transmits the driving force of the motor 1 to the compression mechanism 20. The drive shaft 10 includes a main shaft portion 11 and an eccentric portion 12 provided in a middle portion of the main shaft portion 11. The main shaft portion 11 and the eccentric portion 12 are each cylindrical. The center axis of the eccentric portion 12 is eccentric with respect to the center axis of the main shaft portion 11. That is, when the main shaft 11 rotates, the eccentric portion 12 eccentrically rotates. The main shaft portion 11 is fixed to the rotor 3 of the motor 1. A rotary piston 22 having a cylindrical shape is slidably attached to the outer peripheral portion of the eccentric portion 12. The rotary piston 22 is a component of the compression mechanism 20.

The compression mechanism 20 compresses the low-pressure refrigerant sucked into the compression mechanism 20 by the driving force of the motor 1 transmitted from the drive shaft 10, and discharges the high-pressure refrigerant into the closed casing 30. The compression mechanism 20 includes a cylinder 21, a rotary piston 22, a vane 23, a first bearing 24, a second bearing 25, and a spring 26.

The cylinder 21 has a space formed therein, which becomes a compression chamber 21a. Specifically, the space formed inside the cylinder 21 is partitioned by the vane 23, and a part thereof becomes the compression chamber 21a and a part thereof becomes the suction chamber 21b. The space formed inside the cylinder 21 has a cylindrical shape. The central axis of the space is coaxial with the central axis of the main shaft 11 of the drive shaft 10. In addition, a rotary piston 22 is disposed in this space. Accordingly, the eccentric portion 12 and the rotary piston 22 eccentrically rotate with respect to the central axis of the space formed in the cylinder 21 by the rotation of the drive shaft 10. Further, an upper opening portion of a space formed in the cylinder 21 is closed by the first bearing portion 24. The lower opening of the space formed in the cylinder 21 is closed by the second bearing 25. The first bearing portion 24 and the second bearing portion 25 rotatably support the main shaft portion 11 of the drive shaft 10.

Further, a groove 21c is formed in the cylinder 21 along the radial direction of the cylinder 21. One end of the groove 21c communicates with a space formed in the cylinder 21. The other end of the groove 21c is open to the outer peripheral portion of the cylinder 21. The vane 23 is slidably provided in the groove 21c.

A spring 26 is provided on the end 23a side of the vane 23. The end 26a of the spring 26 is fixed. Specifically, in the present embodiment, the end 26a of the spring 26 is accommodated in, for example, a circular tube-shaped spring guide 27. Also, an end 26a of the spring 26 is fixed to the spring guide 27. In addition, the spring guide 27 is fixed to the outer peripheral portion of the cylinder 21. In addition, the end 26b abuts against the end 23a of the vane 23 in a state where the spring 26 is compressed from the natural length. That is, the spring 26 urges the vane 23 toward the rotary piston 22. In other words, the spring 26 urges the vane 23 toward the space formed inside the cylinder 21.

Thus, even if the eccentric portion 12 and the rotary piston 22 eccentrically rotate in the space formed in the cylinder 21, the end 23b of the vane 23 can always be brought into contact with the outer peripheral surface of the rotary piston 22. That is, even if the eccentric portion 12 and the rotary piston 22 eccentrically rotate in the space formed inside the cylinder 21, the space formed inside the cylinder 21 can be always partitioned into the suction chamber 21b and the compression chamber 21a by the vane 23.

Further, a suction port 21d communicating with the suction chamber 21b is formed in the cylinder 21. One end of the suction pipe 40 is connected to the suction port 21d. The other end of the suction pipe 40 is connected to an accumulator 41 that functions to suppress the refrigerant sound. Further, a discharge port 21e communicating with the compression chamber 21a is formed in the cylinder 21. The discharge port 21e also communicates with the inside of the sealed container 30 via a discharge port, not shown, formed in the first bearing portion 24.

When the rotary piston 22 eccentrically rotates in the cylinder 21, the volume of the suction chamber 21b increases. Thus, the low-pressure refrigerant flows from outside the hermetic compressor 100 into the suction chamber 21b through the accumulator 41, the suction pipe 40, and the suction port 21d. When the rotary piston 22 further eccentrically rotates in the cylinder 21, the suction chamber 21b and the suction port 21d do not communicate with each other. At this time, the space as the suction chamber 21b becomes the compression chamber 21a.

On the other hand, when the rotary piston 22 eccentrically rotates in the cylinder 21, the volume of the compression chamber 21a is reduced. Thereby, the refrigerant in the compression chamber 21a is compressed to become a high-pressure refrigerant, and is discharged into the closed casing 30 through the discharge port 21e and a discharge port, not shown, of the first bearing portion 24. The high-pressure refrigerant discharged into the hermetic container 30 flows out of the hermetic compressor 100 through the discharge pipe 39 communicating with the interior of the hermetic container 30. When the rotary piston 22 further eccentrically rotates in the cylinder 21, the compression chamber 21a and the discharge port 21e do not communicate with each other. At this time, the space as the compression chamber 21a becomes the suction chamber 21b.

The sealed container 30 of the present embodiment includes a container body 31 and a protruding container 35. The container body 31 has a substantially cylindrical shape. In the present embodiment, the container body 31 is constituted by an upper container 32, a middle container 33, and a lower container 34. The intermediate container 33 is a member having a substantially circular tube shape. The upper container 32 is a member that closes an upper opening portion of the middle container 33. The lower container 34 is a member closing the lower opening of the middle container 33.

The protruding container 35 includes a main body 36 having a substantially circular tube shape. The protruding container 35 is configured such that an end 36a of the main body 36 is welded to the container main body 31 and protrudes outward of the container main body 31. In the present embodiment, the end 36a of the main body 36 of the protruding container 35 is welded to the intermediate container 33. The intermediate container 33 has a through hole 33a formed at a position facing the end 36a of the main body 36 of the protruding container 35. Accordingly, the inside of the container body 31 and the inside of the protruding container 35 communicate with each other through the through hole 33a. In addition, an end 36b of the main body 36 of the protruding container 35 is closed by a cover 38. Thereby, the inside of the closed container 30 constituted by the container body 31 and the protruding container 35 becomes a closed space. In the present embodiment, the protruding container 35 includes a flange 37 protruding outside the body 36 at an end 36b of the body 36.

Here, as shown in fig. 2, the cylinder 21, the vane 23, and the like of the compression mechanism 20 are accommodated in the container body 31. On the other hand, the spring 26 and a part of the spring guide 27 pass through the through hole 33a and protrude from the container body 31. The spring 26 and the portion of the spring guide 27 protruding from the container body 31 are disposed inside the protruding container 35. That is, a part of the spring 26 is accommodated in the protruding container 35.

In the case of expanding the stroke volume of the hermetic compressor 100, it is necessary to increase the volumes of the compression chamber 21a and the suction chamber 21b formed in the cylinder 21. Therefore, when the stroke volume of the hermetic compressor 100 is increased, if the springs 26 are all arranged in the container body 31, it may be difficult to ensure the expansion and contraction margin of the springs 26. However, by housing a part of the spring 26 in the protruding container 35, even when the stroke volume of the hermetic compressor 100 is enlarged, a large installation space of the spring 26 can be ensured, and the expansion and contraction margin of the spring 26 can be ensured.

Next, a method for manufacturing the hermetic compressor 100 will be described. Specifically, a method for manufacturing the closed casing 30 will be described. In the present embodiment, the container body 31 and the protruding container 35 are formed of steel. The container body 31 and the protruding container 35 are connected by resistance welding. Here, when the container body 31 and the protruding container 35 are connected by conventional resistance welding, a welding failure may occur at a contact portion between the container body 31 and the protruding container 35. As a result, when the container body 31 and the protruding container 35 are connected by conventional resistance welding, the gas tightness of the connection portion between the container body 31 and the protruding container 35 may be reduced, and the refrigerant may leak from the connection portion between the container body 31 and the protruding container 35. On the other hand, by connecting the container body 31 and the protruding container 35 by resistance welding as shown in the present embodiment, it is possible to suppress occurrence of welding failure at the contact portion between the container body 31 and the protruding container 35 as compared with the conventional case, and it is possible to suppress lowering of the air tightness of the connection portion between the container body 31 and the protruding container 35 as compared with the conventional case. In order to facilitate understanding of the effect, a method of connecting the container body 31 and the protruding container 35 by conventional resistance welding will be described below. Then, a method of connecting the container body 31 and the protruding container 35 by resistance welding according to the present embodiment will be described.

Fig. 3 is a diagram for explaining a method of connecting a container body and a protruding container by conventional resistance welding. In addition, arrows of broken lines shown in fig. 3 indicate the flow of electricity.

In the case of connecting the container body 31 and the protruding container 35 by conventional resistance welding, the container body 31 and the protruding container 35 are sandwiched between the first electrode 61 in contact with the end 36b of the protruding container 35 and the second electrode 62 in contact with the container body 31. That is, the container body 31 and the protruding container 35 are pressurized by the first electrode 61 and the second electrode 62. Then, in this state, electricity is caused to flow between the first electrode 61 and the second electrode 62.

At this time, in the case where the container body 31 and the protruding container 35 are connected by conventional resistance welding, the distance between the first electrode 61 and the second electrode 62 increases, and thus the current at the contact portion between the container body 31 and the protruding container 35 decreases. Therefore, in the case of connecting the container body 31 and the protruding container 35 by conventional resistance welding, a welding failure may occur at the contact portion between the container body 31 and the protruding container 35. As a result, in the case where the container body 31 and the protruding container 35 are connected by conventional resistance welding, the gas tightness of the connection portion between the container body 31 and the protruding container 35 may be reduced, and the refrigerant may leak from the connection portion between the container body 31 and the protruding container 35. In addition, if the voltage between the first electrode 61 and the second electrode 62 is increased in order to increase the current at the contact portion between the container body 31 and the protruding container 35, the temperature of the protruding container 35 may excessively rise, and the protruding container 35 may be deformed. Therefore, in the present embodiment, the container body 31 and the protruding container 35 are connected by resistance welding as described below.

Fig. 4 is a flowchart for explaining a method of connecting a container body and a protruding container by resistance welding according to the present embodiment. Fig. 5 is a view showing a state in which the energizing auxiliary jig is attached to the protruding container of the hermetic compressor of the present embodiment. Fig. 6 is a cross-sectional view A-A of fig. 5. Fig. 7 is a diagram for explaining a method of connecting a container body and a protruding container by resistance welding according to the present embodiment. In addition, the dashed arrows shown in fig. 7 indicate the flow of electricity.

In the present embodiment, when the container body 31 and the protruding container 35 are connected by resistance welding, the energization auxiliary jig mounting step shown as step S1 in fig. 4 is performed. In the energization auxiliary jig mounting step, as shown in fig. 5 and 6, the energization auxiliary jig 50 is mounted on the protruding container 35, and the energization auxiliary jig 50 is brought into contact with the outer peripheral portion of the protruding container 35. More specifically, the energizing auxiliary jig 50 is in contact with the outer peripheral portion of the main body portion 36 of the protruding container 35. The energizing auxiliary jig 50 is formed of a material having higher conductivity than the protruding container 35. That is, the energizing auxiliary jig 50 is formed of a material that is easier to energize than the protruding container 35. In the present embodiment, the energizing auxiliary jig 50 is formed of a copper alloy such as chrome copper alloy.

In the present embodiment, as described above, the flange 37 is provided at the end 36b of the protruding container 35. In other words, the protruding container 35 has the flange 37 at the end 36b which is the end on the side contacting the first electrode 61. The energizing auxiliary jig 50 contacts the flange 37 in addition to the outer peripheral portion of the protruding container 35.

Here, the energizing auxiliary jig 50 of the present embodiment includes a first jig 51 and a second jig 52. The first clamp 51 is formed with a first concave portion 51a that contacts the outer peripheral portion of the main body portion 36 of the protruding container 35. As described above, the main body 36 has a substantially circular tube shape. Accordingly, the cross-sectional shape of the first concave portion 51a is substantially circular-arc-shaped corresponding to the shape of the outer peripheral portion of the main body portion 36. Further, a second concave portion 52a is formed in the second clamp 52 so as to be in contact with the outer peripheral portion of the main body portion 36 of the protruding container 35. The cross-sectional shape of the second concave portion 52a is also substantially circular-arc-shaped corresponding to the shape of the outer peripheral portion of the main body 36, similarly to the cross-sectional shape of the first concave portion 51a. The current-carrying auxiliary jig 50 of the present embodiment is configured such that the main body portion 36 of the protruding container 35 is held between the first jig 51 and the second jig 52, and the current-carrying auxiliary jig 50 is in contact with the outer peripheral portion of the main body portion 36 of the protruding container 35. By configuring the energizing auxiliary jig 50 in this way, the energizing auxiliary jig 50 can be easily brought into contact with the outer peripheral portion of the main body portion 36 of the protruding container 35. The fixing method of the first clamp 51 and the second clamp 52 for clamping the main body 36 of the protruding container 35 is arbitrary. For example, the first jig 51 and the second jig 52 may be fixed using a belt or may be fixed using a clamp.

As shown in fig. 4, step S2 following step S1 is a welding member setting process. In the welding member setting step, as shown in fig. 7, the protruding container 35 and the container body 31 are set between the first electrode 61 in contact with the end 36b of the protruding container 35 and the second electrode 62 in contact with the container body 31. In addition, the energization assistance jig mounting step of step S1 may be performed after the welding member mounting step of step S2. As shown in fig. 4, step S3 following step S1 and step S2 is a pressurizing step. In the pressurizing step, as shown in fig. 7, the container body 31 and the protruding container 35 are sandwiched between the first electrode 61 and the second electrode 62, and the container body 31 and the protruding container 35 are pressurized by the first electrode 61 and the second electrode 62.

As shown in fig. 4, step S4 after step S3 is an energization process. In the power-on step, as shown in fig. 7, the container main body 31 and the protruding container 35 are pressurized by the first electrode 61 and the second electrode 62, and the power is caused to flow between the first electrode 61 and the second electrode 62. Thereby, resistance welding is performed at the contact portion between the container body 31 and the protruding container 35. That is, in the present embodiment, the container body 31 and the protruding container 35 are sandwiched between the first electrode 61 and the second electrode 62, and in a state where the energizing auxiliary jig 50 is brought into contact with the outer peripheral portion of the protruding container 35, electricity is caused to flow between the first electrode 61 and the second electrode 62, and the container body 31 and the protruding container 35 are connected by resistance welding.

As in the present embodiment, by resistance welding the container body 31 to the protruding container 35, the electricity flowing between the first electrode 61 and the container body 31 flows mainly through the auxiliary energizing jig 50 in a range where the auxiliary energizing jig 50 made of a material having higher conductivity than the protruding container 35 is provided. The electricity flowing between the first electrode 61 and the container body 31 flows through the protruding container 35 in a range where the energizing auxiliary jig 50 is not provided. Therefore, by resistance welding the container body 31 and the protruding container 35 as in the present embodiment, the length of the path flowing only through the protruding container 35 can be reduced in the electrical path flowing between the first electrode 61 and the container body 31. Therefore, by resistance welding the container body 31 and the protruding container 35 as in the present embodiment, it is possible to suppress a decrease in current at the contact portion between the container body 31 and the protruding container 35 as compared with the conventional case. Therefore, by resistance welding the container body 31 and the protruding container 35 as in the present embodiment, it is possible to suppress occurrence of welding failure at the contact portion between the container body 31 and the protruding container 35 as compared with the conventional case, and to suppress lowering of the air tightness of the connection portion between the container body 31 and the protruding container 35 as compared with the conventional case.

In the present embodiment, the container body 31 and the protruding container 35 are sandwiched between the first electrode 61 and the second electrode 62, and in a state where the current-carrying auxiliary jig 50 is brought into contact with the outer peripheral portion of the protruding container 35 and the flange 37, electricity is caused to flow between the first electrode 61 and the second electrode 62, and the container body 31 and the protruding container 35 are connected by resistance welding. Therefore, electricity flowing between the first electrode 61 and the container body 31 easily flows into the energizing auxiliary jig 50 through the flange 37. As a result, it is possible to further suppress occurrence of welding failure at the contact portion between the container body 31 and the protruding container 35, and to further suppress a decrease in the air tightness of the connection portion between the container body 31 and the protruding container 35.

As described above, the hermetic compressor 100 of the present embodiment includes the hermetic container 30 in which the cylinder 21, the vane 23, and the spring 26 are housed. A space serving as a compression chamber 21a is formed inside the cylinder 21. The vane 23 is slidably provided in a groove 21c formed in the cylinder 21, and divides a space formed in the cylinder 21. The spring 26 urges the vane 23 toward a space formed inside the cylinder 21. The closed container 30 includes a container body 31 and a protruding container 35. The cylinder 21 and the vane 23 are accommodated in the container body 31. The protruding container 35 is welded to the container body 31 and protrudes outward of the container body 31. A part of the spring 26 is housed in the protruding container 35.

In the present embodiment, the container body 31 and the protruding container 35 are sandwiched by the first electrode 61 in contact with the protruding container 35 and the second electrode 62 in contact with the container body 31. Then, in a state where the energizing auxiliary jig 50 made of a material having higher conductivity than the protruding container 35 is brought into contact with the outer peripheral portion of the protruding container 35, electricity is caused to flow between the first electrode 61 and the second electrode 62, and the container main body 31 and the protruding container 35 are connected by resistance welding. By resistance welding the container body 31 and the protruding container 35 as in the present embodiment, as described above, it is possible to suppress occurrence of welding failure at the contact portion between the container body 31 and the protruding container 35 as compared with the conventional one, and to suppress lowering of the air tightness of the connection portion between the container body 31 and the protruding container 35 as compared with the conventional one.

Description of the reference numerals

A motor; a stator; rotor; drive shaft; main shaft; eccentric part; compression mechanism; cylinder block; compression chamber; inhalation chamber; grooves; suction inlet; discharge port; rotary piston; leaves; end part; end part; a first bearing portion; second bearing part; spring; end part; end part; spring guide; sealing the container; container body; upper container; a middle container; through holes; lower container; protruding container; main body; end part; end part; flange; cover; discharge tube; 40. an intake tube; an energy storage; energizing the auxiliary clamp; 51. first clamp; first recess; second clamp; second recess; 61. a first electrode; 62. a second electrode; a hermetic compressor.

Claims

1. A method for manufacturing a hermetic compressor is characterized in that,

the hermetic compressor includes a hermetic container accommodating: a cylinder body having a space formed therein as a compression chamber, a vane slidably provided in a groove formed in the cylinder body and partitioning the space, and a spring pressing the vane toward the space,

the sealed container is provided with:

a container body that accommodates the cylinder and the vane; and

a protruding container welded to the container body and protruding to the outside of the container body and accommodating a part of the spring,

clamping the container body and the protruding container with a first electrode in contact with the protruding container and a second electrode in contact with the container body,

in a state where an energizing auxiliary jig made of a material having higher conductivity than the protruding container is brought into contact with the outer peripheral portion of the protruding container, electricity is caused to flow between the first electrode and the second electrode,

the container body and the protruding container are connected by resistance welding.

2. The method for manufacturing a hermetic compressor according to claim 1, wherein,

the energization auxiliary clamp is provided with:

a first jig formed with a first recess in contact with the outer peripheral portion of the protruding container; and

a second jig formed with a second concave portion in contact with the outer peripheral portion of the protruding container,

the protruding container is held by the first jig and the second jig, and the energizing auxiliary jig is brought into contact with the outer peripheral portion of the protruding container.

3. A method for manufacturing a hermetic compressor according to claim 1 or 2, wherein,

the protruding container has a flange at an end portion of one side contacting the first electrode,

in a state where the energizing auxiliary jig is brought into contact with the outer peripheral portion of the protruding container and the flange, a current is caused to flow between the first electrode and the second electrode,

4. A method for manufacturing a hermetic compressor according to claim 1 or 2, wherein,

the energizing auxiliary fixture is formed of a copper alloy.