CN115243821A

CN115243821A - Method for manufacturing hermetic compressor

Info

Publication number: CN115243821A
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: 2022-10-25
Anticipated expiration: 2040-02-28
Also published as: CN115243821B; JP7209894B2; JPWO2021171583A1; WO2021171583A1

Abstract

A method for manufacturing a hermetic compressor provided with a hermetic container having a container body (31) and a protruding container (35) protruding from the container body to the outside. When the container body and the projecting container are connected, the container body and the projecting container are sandwiched by a first electrode (61) in contact with the projecting container and a second electrode (62) in contact with the container body, and electricity is flowed between the first electrode and the second electrode in a state where an auxiliary energization jig (50) made of a material having higher conductivity than the projecting container is in contact with an outer peripheral portion of the projecting container, and the container body and the projecting 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 pressing a blade is housed in a hermetic container.

Background

The compression mechanism of the hermetic rotary compressor includes: a cylinder in which a space serving as a compression chamber is formed; a vane slidably provided in a groove formed in the cylinder and partitioning a space formed in the cylinder; and a spring urging the blade toward the space. In addition, the hermetic rotary compressor houses a compression mechanism in a hermetic container. Conventionally, a closed container includes a substantially cylindrical container body. In the conventional hermetic rotary compressor, the cylinder, the vane, and the spring are accommodated in the container body.

In recent years, as the stroke volume of a hermetic rotary compressor increases, the installation space for the spring becomes smaller, and it is sometimes difficult to secure the expansion/contraction margin of the spring. In view of this, in a conventional hermetic rotary compressor, it has been proposed that a hermetic container includes a protruding container, and a part of a spring is accommodated in the protruding container (see, for example, patent document 1). Specifically, the protruding container is welded to the container body and protrudes outward of the container body. A cylinder and a blade are housed in a container body. In addition, a part of the spring is accommodated in the container body, and the remaining part is accommodated in the protruding container. Thus, as compared with the case where the spring is housed only in the container body, the spring can be housed in a larger space, and the spring can be extended and contracted with a larger margin.

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

When the container body and the protruding container of the closed container are connected by resistance welding, the container body and the protruding container are sandwiched between a pair of electrodes and pressurized, and electricity is flowed between the pair of electrodes in this state, thereby welding a contact portion between the container body and the protruding container. However, since the distance between the pair of electrodes sandwiching the container body and the protruding container becomes long, the current at the contact portion between the container body and the protruding container is reduced. Therefore, in a conventional hermetic compressor including a hermetic container having a protruding container, when the container main body and the protruding container are connected by resistance welding, a welding failure may occur at a contact portion between the container main 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 airtightness of the connection portion between the container main body and the protruding container is reduced, and the refrigerant leaks from the connection portion between the container main 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 capable of suppressing a decrease in airtightness of a connecting portion between a container main body and a protruding container as compared with a conventional method.

In the method of manufacturing a hermetic compressor of the present disclosure, the hermetic compressor includes a hermetic container that accommodates: a cylinder having a space formed therein to be a compression chamber, a vane slidably provided in a groove formed in the cylinder and partitioning the space, and a spring for pressing the vane toward the space, the hermetic container comprising: a container main body that accommodates the cylinder and the blade; and a protruding container welded to the container body and protruding outward of the container body, the protruding container accommodating a part of the spring, the container body and the protruding container being sandwiched between a first electrode in contact with the protruding container and a second electrode in contact with the container body, and electricity is flowed between the first electrode and the second electrode in a state where an auxiliary energization jig made of a material having higher electrical conductivity than the protruding container is in contact with an outer peripheral portion of the protruding container, and the container body and the protruding container are connected by resistance welding.

In the method of manufacturing the hermetic compressor according to the present disclosure, the electricity flowing between the first electrode and the container main body mainly flows through the auxiliary energization jig in a range where the auxiliary energization jig made of a material having a 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 auxiliary energization jig is not provided. Therefore, the method of manufacturing the hermetic compressor of the present disclosure can reduce the length of the path flowing only in the protruding container in the path of electricity flowing between the first electrode and the container main body. Therefore, in the method of manufacturing the hermetic compressor of the present disclosure, it is possible to suppress a decrease in current at a contact portion between the container body and the protruding container, as compared with the conventional case. Therefore, in the method of manufacturing the hermetic compressor of the present disclosure, it is possible to suppress occurrence of a welding failure in a contact portion between the container main body and the protruding container as compared with the conventional art, and to suppress a decrease in airtightness of a connecting portion between the container main body and the protruding container as compared with the conventional art.

Drawings

Fig. 1 is a vertical sectional view showing a hermetic compressor of the present embodiment.

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

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

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

Fig. 5 is a view showing a state where an auxiliary energization jig is attached to the protruding container of the hermetic compressor of the present embodiment.

Fig. 6 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 5.

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

Detailed Description

Description of the preferred embodiment

Fig. 1 is a vertical sectional view showing a hermetic compressor of the present embodiment. Fig. 2 is a cross-sectional view showing the sealed container of the present embodiment. Fig. 2 is a diagram showing 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 and 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 the closed casing 30.

The motor 1 includes: a stator 2 fixed to the sealed container 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 at a middle portion of the main shaft portion 11. The main shaft portion 11 and the eccentric portion 12 each have a cylindrical shape. The central axis of the eccentric portion 12 is eccentric with respect to the central axis of the main shaft portion 11. That is, when the main shaft portion 11 rotates, the eccentric portion 12 eccentrically rotates. The main shaft portion 11 is fixed to the rotor 3 of the motor 1. A cylindrical rotary piston 22 is slidably attached to an 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 serving as a compression chamber 21a formed therein. Specifically, the space formed inside the cylinder 21 is partitioned by the vane 23, and a part of the space becomes the compression chamber 21a and a part of the space becomes the suction chamber 21b. The space formed inside the cylinder 21 has a cylindrical shape. The central axis of the space is arranged coaxially with the central axis of the main shaft portion 11 of the drive shaft 10. In addition, a rotary piston 22 is disposed in the space. Therefore, when the drive shaft 10 rotates, the eccentric portion 12 and the rotary piston 22 rotate eccentrically with respect to the central axis of the space formed in the cylinder 21. An upper opening of the space formed inside the cylinder 21 is closed by the first bearing portion 24. The lower opening of the space formed inside 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, the cylinder 21 is formed with a groove 21c formed along the radial direction of the cylinder 21. One end of the groove 21c communicates with a space formed inside the cylinder 21. The other end of the groove 21c opens to the outer periphery 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 blade 23. The end 26a of the spring 26 is fixed. Specifically, in the present embodiment, the end portion 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. Further, the spring guide 27 is fixed to the outer peripheral portion of the cylinder 21. In addition, in the state in which the spring 26 is compressed from the natural length, the end 26b abuts on the end 23a of the blade 23. 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 inside 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, the cylinder 21 is provided with a suction port 21d communicating with the suction chamber 21b. 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 refrigerant noise. Further, the cylinder 21 is formed with a discharge port 21e communicating with the compression chamber 21a. 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. As a result, the low-pressure refrigerant flows from the outside of hermetic compressor 100 into suction chamber 21b through accumulator 41, suction pipe 40, and suction port 21d. When the rotary piston 22 further eccentrically rotates in the cylinder 21, the suction chamber 21b and the suction port 21d are not communicated with each other. At this time, a 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 decreases. Thereby, the refrigerant in the compression chamber 21a is compressed into a high-pressure refrigerant, and is discharged into the sealed container 30 through the discharge port 21e and the discharge port, not shown, of the first bearing portion 24. The high-pressure refrigerant discharged into the sealed container 30 flows out of the hermetic compressor 100 through the discharge pipe 39 communicating with the inside of the sealed container 30. When the rotary piston 22 further eccentrically rotates in the cylinder 21, the compression chamber 21a and the discharge port 21e are not communicated with each other. At this time, a space as the compression chamber 21a becomes the suction chamber 21b.

The closed 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 configured by the upper container 32, the middle container 33, and the lower container 34. The intermediate container 33 is a member having a substantially circular tube shape. The upper container 32 is a member for closing the upper opening of the intermediate container 33. The lower container 34 is a member that closes 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 body portion 36 is welded to the container main body 31 and protrudes outward from the container main body 31. In the present embodiment, the end portion 36a of the main body portion 36 of the protrusion container 35 is welded to the middle container 33. The middle container 33 has a through hole 33a formed at a position facing the end 36a of the body portion 36 of the protruding container 35. Therefore, the inside of the container main body 31 and the inside of the protruding container 35 communicate with each other through the through hole 33a. Further, the end 36b of the body portion 36 of the protruding container 35 is closed by a cover 38. Thus, the inside of the closed casing 30 constituted by the casing main body 31 and the protruding casing 35 becomes a closed space. In the present embodiment, the protruding container 35 includes a flange 37 protruding outward of 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 housed 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 spring guide 27 are disposed in the protruding container 35 at portions protruding from the container body 31. That is, a part of the spring 26 is housed in the protrusion container 35.

When the stroke volume of hermetic compressor 100 is increased, the volumes of compression chamber 21a and suction chamber 21b formed in cylinder 21 need to be increased. Therefore, when the stroke volume of hermetic compressor 100 is increased, it may be difficult to secure the expansion/contraction margin of spring 26 if it is desired to dispose all of spring 26 in container main body 31. 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 increased, the installation space of the spring 26 can be secured to be large, and the expansion/contraction margin of the spring 26 can be secured.

Next, a method of manufacturing 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 a steel material. 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 airtightness 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 described in the present embodiment, it is possible to suppress the occurrence of a 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 the decrease in airtightness at the connection portion between the container body 31 and the protruding container 35 as compared with the conventional case. In order to make it easier to understand this effect, first, a method of connecting the container main body 31 and the protruding container 35 by conventional resistance welding will be described below. Next, a method of connecting the container main 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 main body and a protruding container by conventional resistance welding. In addition, the arrows of the broken lines shown in fig. 3 indicate the flow of electricity.

In the case of connecting the container main body 31 and the protruding container 35 by conventional resistance welding, the container main body 31 and the protruding container 35 are sandwiched by the first electrode 61 contacting the end 36b of the protruding container 35 and the second electrode 62 contacting the container main body 31. That is, the container main 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, when the container main 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 becomes long, and thus the current at the contact portion between the container main body 31 and the protruding container 35 is reduced. Therefore, 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 airtightness 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, in order to increase the current at the contact portion between the container main body 31 and the protruding container 35, if the voltage between the first electrode 61 and the second electrode 62 is increased, the temperature of the protruding container 35 may be excessively increased, 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 main body and a protruding container by resistance welding according to the present embodiment. Fig. 5 is a view showing a state where an auxiliary energization jig is attached to a protruding container of the hermetic compressor according to the present embodiment. Fig. 6 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 5. Fig. 7 is a diagram for explaining a method of connecting the container body and the protruding container by resistance welding according to the present embodiment. In addition, the dotted arrows shown in fig. 7 indicate the flow of electricity.

In the present embodiment, when the container main body 31 and the protruding container 35 are connected by resistance welding, an auxiliary jig mounting step shown as step S1 in fig. 4 is performed. In the energization assisting jig mounting step, as shown in fig. 5 and 6, the energization assisting jig 50 is mounted on the protruding container 35, and the energization assisting jig 50 is brought into contact with the outer peripheral portion of the protruding container 35. More specifically, the auxiliary energization jig 50 is in contact with the outer peripheral portion of the main body portion 36 of the protruding container 35. The auxiliary energization jig 50 is made of a material having higher conductivity than the protruding container 35. That is, the auxiliary energization jig 50 is formed of a material that is easier to be energized than the protruding container 35. In the present embodiment, the energization assisting jig 50 is formed of a copper alloy such as a chromium 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 includes the flange 37 at the end 36b that is the end on the side contacting the first electrode 61. The auxiliary energization jig 50 is in contact with the flange 37 in addition to the outer peripheral portion of the protruding container 35.

Here, the auxiliary energization jig 50 of the present embodiment includes a first jig 51 and a second jig 52. The first jig 51 is formed with a first recess 51a that contacts the outer peripheral portion of the main body portion 36 of the protruding container 35. As described above, the main body portion 36 has a substantially circular tube shape. Therefore, the cross-sectional shape of the first concave portion 51a is substantially arc-shaped in accordance with the shape of the outer peripheral portion of the body portion 36. In addition, a second recess 52a that contacts the outer peripheral portion of the body portion 36 of the protruding container 35 is formed in the second jig 52. The cross-sectional shape of the second recess 52a is also substantially arc-shaped corresponding to the shape of the outer peripheral portion of the body portion 36, as is the cross-sectional shape of the first recess 51a. The auxiliary energization jig 50 of the present embodiment is configured such that the main body 36 of the protruding container 35 is sandwiched between the first jig 51 and the second jig 52, and the auxiliary energization jig 50 is in contact with the outer peripheral portion of the main body 36 of the protruding container 35. By configuring the auxiliary energization jig 50 in this manner, the auxiliary energization 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 first holder 51 and the second holder 52 for holding the body 36 of the protrusion container 35 may be fixed by any method. For example, the first jig 51 and the second jig 52 may be fixed using a tape or may be fixed using a clamping member.

As shown in fig. 4, step S2 after step S1 is a welding component 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 that is in contact with the end portion 36b of the protruding container 35 and the second electrode 62 that is in contact with the container body 31. Further, the energization assisting jig mounting step of step S1 may be performed after the welding member setting step of step S2. As shown in fig. 4, step S1 and step S3 subsequent to step S2 are pressurizing steps. 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 step. In the energization step, as shown in fig. 7, electricity is flowed between the first electrode 61 and the second electrode 62 in a state where the container main body 31 and the protruding container 35 are pressurized by the first electrode 61 and the second electrode 62. Thereby, the contact portion between the container body 31 and the protruding container 35 is resistance-welded. That is, in the present embodiment, the container main body 31 and the protruding container 35 are sandwiched between the first electrode 61 and the second electrode 62, and electricity is flowed between the first electrode 61 and the second electrode 62 in a state where the energization assisting jig 50 is brought into contact with the outer peripheral portion of the protruding container 35, whereby the container main body 31 and the protruding container 35 are connected by resistance welding.

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

In the present embodiment, the vessel body 31 and the protruding vessel 35 are sandwiched between the first electrode 61 and the second electrode 62, and electricity is flowed between the first electrode 61 and the second electrode 62 in a state where the energization assisting jig 50 is brought into contact with the outer peripheral portion of the protruding vessel 35 and the flange 37, thereby connecting the vessel body 31 and the protruding vessel 35 by resistance welding. Therefore, the electricity flowing between the first electrode 61 and the container body 31 easily flows into the auxiliary energization jig 50 through the flange 37. As a result, it is possible to further suppress the occurrence of a welding failure at the contact portion between the container main body 31 and the protruding container 35, and to further suppress the deterioration of airtightness at the connection portion between the container main 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 accommodated. 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 partitions a space formed inside 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 housed in the container body 31. The protruding container 35 is welded to the container body 31 and protrudes outside the container body 31. A part of the spring 26 is accommodated 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 auxiliary energization 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 made 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. 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 the occurrence of a welding failure at the contact portion between the container body 31 and the protruding container 35 as compared with the conventional art, and to suppress the reduction in airtightness at the connection portion between the container body 31 and the protruding container 35 as compared with the conventional art.

Description of the reference numerals

An electric motor; a stator; a rotor; 10.. A drive shaft; a main shaft portion; an eccentric portion; a compression mechanism portion; a cylinder body; a compression chamber; a suction chamber; a slot; a suction inlet; a discharge port; rotating a piston; a leaf; an end portion; 23b.. End portion; a first bearing portion; a second bearing portion; a spring; an end portion; an end portion; a spring guide; sealing the container; a container body; an upper container; a middle container; a through hole; a lower container; projecting the container; a main body portion; an end portion; 36b.. End; a flange; a cover; a discharge tube; a suction tube; an energy storage; energizing an auxiliary fixture; a first clamp; a first recess; a second clamp; a second recess; a first electrode; 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 having a space formed therein as a compression chamber, a vane slidably provided in a groove formed in the cylinder and partitioning the space, and a spring for urging the vane toward the space,

the closed container includes:

a container main body that accommodates the cylinder and the blade; and

a protruding container welded to the container body and protruding outward of the container body and accommodating a portion 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,

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

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

2. The manufacturing method of hermetic compressor according to claim 1, characterized in that,

the auxiliary energizing jig includes:

a first jig formed with a first recess that contacts the outer peripheral portion of the protruding container; and

a second jig formed with a second recess that contacts the outer peripheral portion of the protruding container,

the protruding container is clamped by the first clamp and the second clamp, and the auxiliary energization clamp is brought into contact with the outer peripheral portion of the protruding container.

3. The manufacturing method of the hermetic compressor according to claim 1 or 2,

the protruding container is provided with a flange at an end portion on a side contacting the first electrode,

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

and connecting the closed container and the protruding container through resistance welding.

4. The method of manufacturing a hermetic compressor according to any one of claims 1 to 3, wherein the hermetic compressor further comprises a hermetic compressor having a hermetic compressor casing,

the energization assisting jig is formed of a copper alloy.