JP3846040B2 - Hermetic compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hermetic compressor used as a refrigerant compressor or an air compressor for refrigeration and air conditioning.
[0002]
[Prior art]
Conventionally, in this type of refrigerant compressor, as shown in FIG. 10, a compression mechanism 105 and a compression mechanism 105 are driven inside a sealed container 104 including an upper end plate 101, a body portion 102, and a lower end plate 103. An electric motor 106 is fixed. The electric power of the electric motor 106 is supplied from an external power source (not shown) through a power terminal 110 having a conductive pin 109 insulated by a glass seal 108 on a cap-shaped metal body 107 hermetically welded to the hermetic container 104. The
[0003]
The refrigerant is sucked into the compression mechanism 105 from the suction pipe 111 connected to the refrigeration cycle (not shown), compressed, becomes high pressure, discharged into the sealed container 104, and returned from the discharge pipe 112 to the refrigeration cycle (not shown). Therefore, the inside of the hermetic container of this type of compressor is filled with a high-pressure refrigerant.
[0004]
Conventionally, HCFC22 has been used as a refrigerant for such a compressor, but since it may cause the ozone layer to be destroyed by atmospheric release, it is decided to eliminate it in the future. Several alternative HFC refrigerants are candidates for HCFC22, but R407C, which is a mixed refrigerant of HFC125, HFC32, and HFC134a, and R410A, which is a mixed refrigerant of HFC125 and HFC32, is listed as a promising candidate. In R407C, the discharge pressure is almost the same as R22, but in R410A, the discharge pressure is about 1.7 times that of R22.
[0005]
When such an alternative refrigerant having a large discharge pressure is used in a high-pressure closed compressor whose discharge pressure is set by the sealed container, the pressure resistance of the sealed container 104 must be increased.
[0006]
In the above conventional configuration, as the pressure inside the sealed container 104 increases, the upper end plate 101 and the lower end plate 103 bulge outward and gradually become spherical. Since the power terminal 110 is welded and fixed to the flat portion of the upper end plate 101, the deformation causes the cap-shaped metal body 107 of the power terminal 110 to be stressed and deformed, the glass seal 108 is broken, and the high-temperature and high-pressure refrigerant leaks to the outside. To do. In the conventional structure, this part is the weakest part of pressure resistance, and in order to increase the pressure resistance of the whole sealed container, it is necessary to reinforce the pressure resistance of this part.
[0007]
In addition, since the tensile stress is applied to the joint portion between the sealed container 104 and the refrigerant connection pipe such as the suction pipe 111 and the discharge pipe 112 due to the high pressure inside the sealed container 104, the joint portion is located next to the portion of the power supply terminal 110 where the pressure strength is weak. is there.
[0008]
In this hermetic compressor, a means of welding the ring-shaped metal body 113 around the power supply terminal 110 or the discharge pipe 112 is considered for the purpose of providing a hermetic container having a pressure resistance that can withstand a high-pressure alternative refrigerant. It has been.
[0009]
[Problems to be solved by the invention]
However, in the above-described means of welding the ring-shaped metal body 113 to a portion having a weak pressure resistance, water drops due to rain, condensation, etc. tend to accumulate in the gap between the cap-shaped metal body 107 and the ring-shaped metal body 113, and the cap-shaped metal Rust is generated in the body 107 and the upper end plate 101, and the pressure strength is reduced.
[0010]
Further, since the ring-shaped metal body has to improve the pressure strength and must be welded, a special shape is required, and there is no established manufacturing means yet.
[0011]
The present invention solves such a problem, and prevents the occurrence of rust due to water accumulation due to rain, condensation, etc. in the power supply terminal part and the refrigerant connection pipe part, and locally reinforces the sealed container. The purpose is to improve the reliability of the hermetic compressor and to reduce the cost of the hermetic compressor.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a member for improving the rigidity of a sealed container that is welded so as to surround a welded part of a power supply terminal or a welded part of a refrigerant connection pipe that is hermetically welded to a sealed container of a hermetic compressor. An arc-shaped metal body with a notch in the arc-shaped metal body that makes it easy to remove water droplets due to rain, condensation, etc., and prevents rusting. In order to improve the reliability of the compressor by locally reinforcing weak areas, and to reduce the cost of the hermetic compressor by adopting a more efficient arc-shaped metal body manufacturing method. is there.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The present invention can employ the configurations described in each claim as an embodiment, but in order to make the present invention easier to understand, the operation of the configuration of each claim will be described. That is, the invention described in claim 1 includes a welded portion of a power supply terminal that is sealed and welded to a sealed container of a hermetic compressor, and a member that improves the rigidity of the sealed container is welded to the sealed container. An arc-shaped metal body that improves the rigidity of the outer periphery of the welded portion of the power supply terminal even when the part where the power-supply terminal is welded is deformed due to the configuration in which the member to be improved is an arc-shaped metal body. Suppresses deformation of the power terminal, prevents cracking of the insulation seal of the power terminal, improves pressure resistance, and drops of water collected due to rain or condensation between the power terminal and the arc-shaped metal body Can be easily removed from the cut-out portion of the arc-shaped metal body, preventing the occurrence of rust, and improving the reliability of the compressor.
[0014]
According to the second aspect of the present invention, the pressure-resistant strength of the connecting portion of the refrigerant connecting pipe connecting the inside and the outside of the sealed container and entering and exiting the refrigerant is improved, and the member for improving the rigidity is an arc-shaped metal body. As a result, water droplets accumulated due to rain, condensation, or the like between the refrigerant connection pipe and the arc-shaped metal body can be easily removed from the cutout portion of the arc-shaped metal body, and the reliability of the compressor can be improved. Further, since the refrigerant connection pipe is generally welded by copper brazing, the assembly can be facilitated by brazing nearby arc-shaped metal bodies at the same time.
[0015]
According to the third aspect of the present invention, the arc-shaped metal body is welded to the inside of the hermetic container, and by welding the inner side, the protection cover of the power terminal and the power supply lead wire that are configured outside the hermetic container are obstructed. In other words, there is no portion where water droplets accumulate due to rain or condensation between the power terminal or the refrigerant connection tube and the arc-shaped metal body, and the problem of rust generation due to the accumulated water can be solved.
[0016]
The inventions of claims 4 and 5 are the one in which the arc-shaped metal body is welded to the outside of the sealed container, or is welded integrally with the protective frame body of the power terminal, and the arc-shaped metal body is the terminal of the terminal to the sealed container. It does not interfere with the operation during welding. Moreover, it can be welded integrally with the protective frame and is easy to assemble.
[0017]
According to the sixth aspect of the present invention, the arc-shaped metal body is welded integrally with the refrigerant connection pipe, and is easy to assemble. Conventionally, only the refrigerant connection pipe is brazed and welded to the upper end plate. On the other hand, since both the refrigerant connection pipe and the arc-shaped metal body are brazed and welded, the brazed area is increased and the pressure resistance can be improved.
[0018]
Each of the inventions according to claims 7, 8, and 9 is a specific means for welding the arc-shaped metal body to the sealed container, and is provided with a linear or dot-like protrusion at a weld joint with the sealed container, or a ring By subjecting the small width to resistance welding as it is, almost the entire surface is welded and fixed to the sealed container, and deformation of the welded portion can effectively suppress deformation of the power supply terminal. In the case of resistance welding, it is preferable to reduce the width of the arc-shaped metal body in order to increase the current density.
[0019]
In the invention according to claim 10, the welding means for welding the arc-shaped metal body to the sealed container or the refrigerant connection pipe is brazed welding, and assembling can be simplified.
[0020]
Each of the inventions according to claims 11, 12, 13, 14, and 15 shows a specific means for manufacturing the arc-shaped metal body, and the material is obtained by manufacturing the arc-shaped metal body by bending a metal wire. It can be used without waste. Moreover, when performing a press work or a forging process, while being able to achieve efficiency of manufacture, the tensile strength of an arc-shaped metal body can be improved and the pressure resistance strength of an airtight container can be improved. Further, when performing fine blanking, the projections necessary for resistance welding can be easily and accurately added, and the production efficiency can be improved. Furthermore, when cutting, the accuracy of the arc-shaped metal body can be improved, and uniform welding strength can be ensured over the entire circumference of the arc-shaped metal body.
[0021]
The invention according to claim 16 is the one in which a plurality of arc-shaped metal bodies are welded to the sealed container so as to surround the power supply terminal or the refrigerant connection pipe, and the cost is reduced by minimizing the material cost. Since there are a plurality of notches around the refrigerant connection pipe, it is very easy to remove water droplets due to rain or condensation, and the reliability of the compressor can be improved by preventing rust.
[0022]
The invention according to claim 17 is capable of minimizing the cost of parts by making the member for improving the rigidity of the sealed container into a polygonal straight bar member and welding it to a weak part of the sealed container. The pressure strength can be ensured, and water drops due to rain, condensation, etc. are difficult to accumulate, and the reliability of the compressor can be improved.
[0023]
As described in the eighteenth aspect of the present invention, the above invention is more effective when implemented with HFC32, which is a high-pressure refrigerant, or a mixed refrigerant containing the same.
[0024]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0025]
FIG. 1 is a longitudinal sectional view of a hermetic compressor according to an embodiment of the present invention. The hermetic compressor in this figure is provided with a compression mechanism 5 and an electric motor 6 for driving the compression mechanism 5 in a hermetic container 4 composed of an upper end plate 1, a cylindrical body 2, and a lower end plate 3. It has become the composition. Although details of the compression mechanism are not shown, it may be a rotary type or a scroll type. The electric power of the electric motor 6 is supplied from an external power source (not shown) through a power terminal 8 that is hermetically welded to a hole 7 formed in the upper end plate 1 of the sealed container 4.
[0026]
The refrigerant is sucked in from the suction pipe 9 connected to the refrigeration cycle (not shown), compressed by the compression mechanism 5, becomes high pressure, is discharged into the sealed container 4, and is returned from the discharge pipe 10 to the refrigeration cycle (not shown). Therefore, in the present embodiment, the inside of the hermetic container 4 is filled with a high-pressure refrigerant, and has a so-called high-pressure compressor configuration.
[0027]
The power supply terminal 8 has a conductive pin 13 that is insulated by an insulating seal 12 such as glass on the cap-shaped metal body 11. The lower part of the cap-shaped metal body 11 forms a skirt portion 14 that spreads in a skirt shape, and is airtightly welded to the hole 7 formed in the flat portion of the upper end plate 1 at the skirt portion 14. An arcuate metal body having a cutout portion Ga that improves the deformation rigidity of the hermetic container 4 on the outside of the cap-shaped metal body 11 of the power supply terminal 8 outside the hermetic container 4 and is easy to remove water droplets and is easy to manufacture. 15 is welded. Further, an arcuate metal body 15 a having a notch Gb is welded to a portion where the discharge pipe 10 is welded to the upper end plate 1.
[0028]
Example 1
The case where the arcuate metal body 15 or the arcuate metal body 15b having a burring is welded around the power supply terminal 8 will be described in detail as Example 1 with reference to FIGS.
[0029]
A method for assembling the arc-shaped metal body 15 and the power terminal 8 to the upper end plate 1 will be described. A hole 7 slightly larger than the outer diameter of the cap-shaped metal body 11 is formed in the flat portion 16 where the flatness of the upper end plate 1 is provided with relatively high flatness. The arc-shaped metal body 15 is welded and fixed to the outer periphery of the hole 7 by resistance welding. That is, the contact portion 17 where the arcuate metal body 15 comes into contact with the hermetic container 4 is brought out with a relatively high degree of flatness, is brought into close contact with the flat portion 16 of the upper end plate 1 uniformly, and a current is applied to perform resistance welding.
[0030]
Next, the pressure resistance evaluation of the sealed container of Example 1 will be described. The pressure resistance of the airtight container 4 of the refrigerant compressor is generally required not to be destroyed when a hydrostatic pressure of 3 to 5 times the design pressure (maximum pressure during operation) is applied. When the hydrostatic pressure of 3 to 5 times the design pressure is gradually applied to the inside of the sealed container 4 in the embodiment of the present invention, the sealed container 4 gradually expands, and in particular, the upper end plate 1 swells in a spherical shape. At this time, when the arcuate metal body 15 is not present, the skirt portion 14 of the power supply terminal 8 that is welded and fixed to the flat portion 16 also becomes a part of the spherical surface and is pushed inward with a strong force. With this force and the internal hydrostatic pressure, the insulating seal 12 also spreads outward and becomes spherical, so that a large force is applied to the insulating material such as glass, and the insulating material such as glass breaks and leaks. Therefore, the ring-shaped metal body 113 shown in FIG. 10 is welded and fixed to the flat portion 16 of the sealed container 4 to suppress deformation, and the skirt portion 14 of the power supply terminal 8 is pushed inward with a strong force. A method of suppressing the cracks and preventing the insulating seal 12 from cracking has been considered. Even in the case where the arc-shaped metal body 15 is used instead of the ring-shaped metal body in the present embodiment, the pressure resistance of the hermetic compressor is almost the same, and in particular, the upper end plate 1 is notched from the center to the farthest part. In the case where the portion Ga is provided, the stress generated in the notch Ga is minimized, and the influence of the decrease in the pressure strength due to the notch Ga is minimized. Accordingly, the removal of water droplets accumulated between the power supply terminal 8 and the arc-shaped metal body 15 can be easily performed by the cutout portion Ga, thereby improving the reliability of the product, and at the same time the pressure including the HFC 32 such as R410A. An airtight container with sufficient pressure resistance even for a high refrigerant can be realized.
[0031]
In the above description, resistance welding was described as the welding method, but brazing welding or the like in which the welded portion of the arc-shaped metal body 15 and the flat portion 16 of the sealed container 4 has an arc shape may be used. Further, the arc-shaped metal body 15 is not limited to one C-shaped ring, and a plurality of arc-shaped metal bodies or a plurality of linear metal bodies may be disposed surrounding the welded portion of the power terminal. It works to improve the deformation rigidity of the sealed container, and the same effect can be obtained. Can do. In order to prevent deformation of the hermetic container 4 from exerting a large force on the insulating seal 12 of the power terminal 8, the length of the welded portion is desirably 1/4 or more of the entire circumference, and the rigidity reinforcing member is 2/3 of the entire circumference. The above is desirable.
[0032]
In the first embodiment, the arc-shaped metal body 15 is welded to the outside of the sealed container 4, but may be welded to the inside of the sealed container 4 as shown in FIG. In this case, the inner diameter of the arcuate metal body 15 must be larger than the outer diameter of the power supply terminal 8. Further, the function of removing water droplets by the notch Ga of the arc-shaped metal body 15 becomes meaningless, but it is sufficiently effective for simplifying and reinforcing the manufacture of the arc-shaped metal body 15. Further, the shape of the arc-shaped metal body 15 may be an arc-shaped metal body 15b having a burring as shown in FIGS.
[0033]
Next, means for producing the arc-shaped metal body will be described. Since the ring-shaped metal body, which is an existing rigid reinforcing member, does not have a notch portion, it has to rely on cutting or the like, and the material removal is very poor. On the other hand, in the arc-shaped metal body, it can be manufactured by winding the drawn wire like a spring and cutting it, or by cutting it sequentially while winding the wire, The material can be used without waste, and the production can be simplified and the cost of parts can be reduced. In particular, when a wire having a round cross section is used, the welded portion can be made linear, not only can a sufficient welding strength be secured, but an existing mass-produced wire can be used. Moreover, in either case of an arc-shaped metal body or a ring-shaped metal body, it can be manufactured by pressing or forging. Further, by using the fine blanking method for providing the linear welded portion, it can be manufactured at high speed and with high accuracy, and mass production can be performed while sufficiently securing the pressure strength.
[0034]
(Example 2)
7 and 8 show an embodiment in which the refrigerant of the present invention is taken in and out, that is, an arc-shaped metal body is arranged in a refrigerant connection pipe such as the suction pipe 9 or the discharge pipe 10. A discharge pipe 10, which is one of refrigerant connection pipes for taking in and out the refrigerant from the hermetic container 4, is welded and fixed to the upper end plate 1, and an arcuate metal body 15 a is welded to the outer periphery of the welded part. When pressure is applied to the inside of the sealed container 4, the upper end plate 1 is deformed into a spherical shape. When there is no arcuate metal body 15a, tensile stress concentrates on the brazed portion 19 of the hole connecting the discharge pipe 10 and the sealed container 4, and breaks, but even if the upper end plate 1 is deformed in this configuration, Since the deformation in the vicinity of the welded portion of the discharge pipe 10 is suppressed and the tensile stress is relieved, the conventional function of preventing the high pressure refrigerant from leaking to the outside by breaking the brazing portion 19 and improving the pressure resistance Can be fully satisfied. Furthermore, due to the effect of the cutout portion Gb of the arc-shaped metal body 15a, water drops due to rain, condensation, etc. can be removed, and by simplifying the manufacturing method of the arc-shaped metal body 15a as described above, Cost can be reduced.
[0035]
In the embodiment shown in FIG. 7, the arc-shaped metal body 15a is welded to the outside of the sealed container 4, but it may be welded to the inside of the sealed container 4 as shown in FIG. The shape of the arcuate metal body 15a may be an arcuate metal body 15c having a burring as shown in FIGS. 9 (a) and 9 (b). In addition, since the refrigerant connection pipe is generally welded by copper brazing, assembly can be facilitated by brazing nearby arc-shaped metal bodies 15a at the same time.
[0036]
In the invention described above, when the hermetic container 4 is constituted by the body 2, the upper end plate 1, and the lower end plate 3, and when the power terminal 8 and the refrigerant connection pipe are welded to the upper end plate 1, the upper end plate 1 is greatly deformed. It is valid. Furthermore, it is more effective when used for a high pressure mixed refrigerant such as HFC32, which is a high pressure refrigerant, or R410A including the high pressure refrigerant.
[0037]
【The invention's effect】
As is apparent from the above description, according to the inventions of claims 1 to 6, the rigidity of the sealed container is increased by surrounding the welded portion of the power supply terminal or the refrigerant connection pipe that is sealed and welded to the sealed container of the hermetic compressor. In the case where the member to be improved is welded to the sealed container, the member to improve the rigidity is an arc-shaped metal body, the inside of the sealed container becomes high pressure, and the end plate of the sealed container in which the power supply terminal or the refrigerant connection pipe is welded Even if deformation occurs, a member that improves the rigidity of the outer periphery of the power terminal welded part or the refrigerant connection pipe welded part suppresses the deformation of the power terminal or refrigerant connection pipe, and the power terminal insulation seal or the refrigerant connection pipe welded part cracks. In addition to improving the pressure resistance, water droplets accumulated due to rain, condensation, etc. between the power terminal or the refrigerant connection tube and the arc-shaped metal body can be prevented. Is easily removed from the notch portion of the arcuate metal body, to prevent rust, you are possible to improve the reliability of the hermetic compressor.
[0038]
According to the inventions of claims 7, 8, and 9, the power terminal is connected even if the entire surface is welded and fixed to the hermetic container by resistance welding of the arc-shaped metal body to the hermetic container, and there are some notches. Alternatively, the deformation of the refrigerant connection pipe can be effectively suppressed, and a hermetic compressor having a high pressure resistance can be realized.
[0039]
According to the tenth aspect of the invention, the welding method of the arc-shaped metal body to the sealed container or the refrigerant connection pipe is brazed welding, and assembling can be simplified.
[0040]
According to invention of Claim 11 and 12,13,14,15, an arc-shaped metal body can be manufactured by processing a metal wire, and can use material without waste. In addition, by performing press working and forging, it is possible to improve the production efficiency, improve the tensile strength of the arc-shaped metal body, and improve the pressure resistance of the sealed container. By performing the fine blanking process, the projections necessary for resistance welding can be easily and accurately added, and the production efficiency can be improved. Furthermore, by performing the cutting process, the accuracy of the arc-shaped metal body can be improved, and uniform welding strength can be ensured over the entire circumference of the arc-shaped metal body.
[0041]
According to the sixteenth aspect of the present invention, a plurality of arc-shaped metal bodies are welded to the sealed container so as to surround the power supply terminal or the refrigerant connection pipe, and the cost is reduced by minimizing the material cost. Since there are multiple notches around the terminal or around the refrigerant connection pipe, it is very easy to remove water droplets due to rain or condensation, and to improve the reliability of the compressor by preventing rust. Can do.
[0042]
According to the seventeenth aspect of the present invention, the member for improving the rigidity of the sealed container is a polygonal straight bar member, and is welded to a weak portion of the upper end plate, thereby minimizing the component cost. In addition, the pressure strength can be ensured, and water droplets due to rain, condensation, etc. are hardly collected, and the reliability of the compressor can be improved.
[0043]
According to the invention described in claim 18, the invention described in any one of claims 1 to 17 is more effective when implemented with HFC32 which is a high-pressure refrigerant or a refrigerant including the same.
[Brief description of the drawings]
1A is a longitudinal sectional view of a hermetic compressor according to an embodiment of the present invention, FIG. 2B is a top view thereof, and FIG. 2A is a circle outside a sealed container near a power supply terminal according to the first embodiment of the present invention. Fig. 3B is a top view of the main part provided with the arc-shaped metal body. Fig. 3A is a cross-sectional view of the arc-shaped metal body provided with linear protrusions in Example 1 of the present invention. FIG. 4 is a longitudinal sectional view of a main part in which an arc-shaped metal body is provided inside a sealed container near a power terminal in Embodiment 1 of the present invention. FIG. 5 is an outside of the sealed container near a power terminal in Embodiment 1 of the present invention. FIG. 6 is a vertical cross-sectional view of a main part provided with an arc-shaped metal body having a burring in FIG. 6; FIG. 7 is a discharge pipe that is a refrigerant connection pipe in Embodiment 2 of the present invention. FIG. 8 is a longitudinal sectional view of a main part in which an arc-shaped metal body is provided on the outer side of the airtight container. FIG. FIG. 9A is a longitudinal sectional view of a main part in which an arc-shaped metal body having a burring is provided on the outside of a sealed container near a discharge pipe which is a refrigerant connection pipe in Embodiment 2 of the present invention. 10 is a longitudinal cross-sectional view of a main part provided with an arc-shaped metal body having a burring inside a hermetic container. FIG. 10A is a vertical cross-sectional view of a conventional hermetic compressor. FIG.
DESCRIPTION OF SYMBOLS 1 Upper end plate 2 Trunk part 4 Airtight container 5 Compression mechanism 6 Electric motor 7 Hole 8 Power supply terminal 10 Discharge pipe (refrigerant connection pipe)
11 Cap-shaped metal body 12 Insulating seal 13 Conductive pins 15, 15a Arc-shaped metal bodies 15b, 15c Arc-shaped metal body 18 with burring 18 Linear protrusion 19 Brazed portion Ga, Gb Notch

Claims (18)

An electric motor and a compression mechanism that is driven by the electric motor are disposed inside the closed container, and a power terminal that is hermetically welded to the sealed container is provided to supply power from the outside of the sealed container, and the power terminal is a cap A metal member, a conductive pin, an insulating seal that insulates the cap-shaped metal member and the conductive pin, surrounds a welded portion between the sealed container and the power terminal, and seals a member that improves the deformation rigidity of the sealed container. A hermetic compressor welded to a container, wherein the member for improving the deformation rigidity is an arc-shaped metal body. An electric motor and a compression mechanism driven by the electric motor are arranged inside the sealed container, and a refrigerant connection pipe that connects the inside and outside of the sealed container and through which a refrigerant passes is fixed by welding to the sealed container, and an outer periphery of the welded portion A hermetic compressor in which a member for improving deformation rigidity is welded, wherein the member for improving deformation rigidity is an arc-shaped metal body. The hermetic compressor according to claim 1 or 2, wherein the arc-shaped metal body is welded to the inside of the hermetic container. The hermetic compressor according to claim 1 or 2, wherein the arc-shaped metal body is welded to the outside of the hermetic container. The hermetic compressor according to claim 1, wherein the arc-shaped metal body is welded integrally with the protective frame of the power terminal. The hermetic compressor according to claim 2, wherein the arc-shaped metal body is welded integrally with the refrigerant connection pipe. The hermetic compressor according to any one of claims 1 to 6, wherein the arc-shaped metal body is resistance-welded to the hermetic container. The hermetic compressor according to claim 7, wherein the arc-shaped metal body has a width of 4 mm or less, and is resistance-welded without providing a protrusion at a welded joint with the hermetic container. 8. The hermetic compressor according to claim 7, wherein a linear or dot-like projection is provided at a welded joint between the arc-shaped metal body and the hermetic container and resistance welding is performed. The hermetic compressor according to claim 6, wherein the refrigerant connection pipe and the arc-shaped metal body are fixed to the hermetic container by brazing welding. The hermetic compressor according to any one of claims 1 to 10, wherein the arc-shaped metal body is manufactured by bending a wire. The hermetic compressor according to any one of claims 1 to 10, wherein the arc-shaped metal body is manufactured by pressing. The hermetic compressor according to any one of claims 1 to 10, wherein the arc-shaped metal body is manufactured by fine blanking. The hermetic compressor according to any one of claims 1 to 10, wherein the arc-shaped metal body is manufactured by forging. The hermetic compressor according to any one of claims 1 to 10, wherein the arc-shaped metal body is manufactured by cutting out a ring-shaped metal body manufactured by cutting. The hermetic compressor according to any one of claims 1 to 15, wherein a plurality of arc-shaped metal bodies are welded so as to surround a power supply terminal or a refrigerant connection pipe. The hermetic compressor according to any one of claims 1 to 16, wherein the arc-shaped metal body has a polygonal shape. The hermetic compressor according to any one of claims 1 to 17, wherein HFC32 or a mixed refrigerant including the HFC32 is used as the refrigerant.

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