Embodiments described herein relate generally to a horizontal compressor and a refrigeration cycle system including the compressor.
Horizontal compressors each include a pair of first legs and a second leg, in which the pair of first legs support a hermetic container in a horizontal attitude on an installation surface, the container storing a compression mechanism unit and an electric motor unit, and the second leg is used to stand the hermetic container in a manufacturing process of the horizontal compressor. The first legs are spatially arranged in the axial direction of the hermetic container. The second leg is arranged at one end of the hermetic container located on the side of the compression mechanism unit and is adjacent to one of the first legs near the compression mechanism unit.
Such a configuration inevitably increases the number of components of the horizontal compressor due to the first legs and second leg near the compression mechanism unit that have different and independent components and further increases labor-hours required for mounting the legs to the hermetic container.
As a measure against this, horizontal compressors are conventionally known, each of which includes a second leg located at one end of a hermetic container, the second leg being integrally provided with a support piece bent to face an installation surface when supporting the hermetic container in a horizontal attitude.
This type of horizontal compressor has an integrated structure in which the second leg has both of a function of supporting the hermetic container in a horizontal attitude and a function of standing the hermetic container. Thus, it becomes possible to omit a first leg adjacent to the second leg, and it becomes possible to reduce the number of components of the horizontal compressor and reduce the labor-hours required for assembling the horizontal compressor.
Incidentally, in the horizontal compressor, a joint port that communicates with a cylinder chamber of the compression mechanism unit is arranged in an outer peripheral surface of the hermetic container. The joint port protrudes outward from the hermetic container, at a position corresponding to the compression mechanism unit, and the joint port is connected to an accumulator attached to the hermetic container via a refrigerant return pipe. The refrigerant return pipe is fixed to an opening end of the joint port by means such as brazing.
However, in the conventional horizontal compressor in which the second leg has both of the function of supporting the hermetic container in a horizontal attitude and the function of standing the hermetic container, the support piece expands from the second leg to the joint port. Accordingly, an end of the support piece is located immediately in front of the joint port, and the interval between the end of the support piece and the joint port is very small.
Therefore, for brazing the refrigerant return pipe to the joint port, the support piece may hinder the brazing, and it is undeniable that the productivity of the horizontal compressor is diminished.
In general, according to one embodiment, a horizontal compressor comprises a cylindrical hermetic container, a compression mechanism unit, an electric motor unit, a first leg, a second leg, an accumulator, and a joint port. The compression mechanism unit is housed in the hermetic container to compress a refrigerant. The electric motor unit is housed in the hermetic container so as to be aligned with the compression mechanism unit in an axial direction of the hermetic container, and drives the compression mechanism unit. The first leg is fixed to the hermetic container at a position near the electric motor unit to support the hermetic container in a horizontal attitude on an installation surface. The second leg is fixed to an end of the hermetic container located on the side of the compression mechanism unit to support the hermetic container in a horizontal attitude on the installation surface. The accumulator is attached to the hermetic container, between the first leg and the second leg. The joint port is provided in the hermetic container to join a refrigerant return pipe. The refrigerant return pipe guides a refrigerant in the accumulator to the compression mechanism unit. The second leg includes a first support portion of plate shape that faces the installation surface to support the hermetic container in a horizontal attitude, and a second support portion of plate shape that supports the hermetic container standing in a vertical attitude. The first support portion extends in a direction away from the joint port relative to the second support portion.
The first embodiment will be described below with reference to
Specifically, as illustrated in
When the air conditioner 1 operates in a cooling mode, the four-way valve 3 is switched so that the first port 3a communicates with the second port 3b and the third port 3c communicates with the fourth port 3d. When the operation of the air conditioner 1 is started in the cooling mode, a high-temperature and high-pressure gas-phase refrigerant obtained by compression by the horizontal compressor 2 is discharged to the circulation circuit 7. The discharged gas-phase refrigerant is guided to the outdoor heat exchanger 4 that functions as a radiator (condenser), via the four-way valve 3.
The gas-phase refrigerant guided to the outdoor heat exchanger 4 is condensed by heat exchange with air and changes into a high-pressure liquid-phase refrigerant. The high-pressure liquid-phase refrigerant is decompressed in the process of passing through the expansion device 5 and changes to a low-pressure gas-liquid refrigerant. The gas-liquid refrigerant is guided to the indoor heat exchanger 6 that functions as a heat absorber (evaporator) and is heat-exchanged with air in the process of passing through the indoor heat exchanger 6.
Therefore, the gas-liquid refrigerant is vaporized by absorbing heat from air and changes into a low-temperature and low-pressure gas-phase refrigerant. The air passing through the indoor heat exchanger 6 is cooled by latent heat of vaporization of the liquid-phase refrigerant, becomes cool air, and the cool air is sent to a place to be air-conditioned (cooled).
The low-temperature and low-pressure gas-phase refrigerant that has passed through the indoor heat exchanger 6 is guided to the accumulator 8 via the four-way valve 3. When the refrigerant contains the liquid-phase refrigerant that has not vaporized, the refrigerant is separated into a liquid-phase refrigerant and a gas-phase refrigerant in the accumulator 8. The low-temperature and low-pressure gas-phase refrigerant separated from the liquid-phase refrigerant is sucked from the accumulator 8 into the horizontal compressor 2 and compressed again into a high-temperature and high-pressure gas-phase refrigerant by the horizontal compressor 2, and the high-temperature and high-pressure gas-phase refrigerant is discharged to the circulation circuit 7.
On the other hand, when the air conditioner 1 operates in a heating mode, the four-way valve 3 is switched so that the first port 3a communicates with the third port 3c and the second port 3b communicates with the fourth port 3d. When the operation of the air conditioner 1 is started in the heating mode, a high-temperature and high-pressure gas-phase refrigerant discharged from the horizontal compressor 2 is guided to the indoor heat exchanger 6 via the four-way valve 3 and is heat-exchanged with air passing through the indoor heat exchanger 6. In other words, the indoor heat exchanger 6 functions as a condenser.
Therefore, the gas-phase refrigerant passing through the indoor heat exchanger 6 is condensed by heat exchange with air and changes into a high-pressure liquid-phase refrigerant. The air passing through the indoor heat exchanger 6 is heated by heat exchange with the gas-phase refrigerant, becomes hot air, and the hot air is sent to a place to be air-conditioned (heated).
The high-temperature liquid-phase refrigerant that has passed through the indoor heat exchanger 6 is guided to the expansion device 5, decompressed in the process of passing through the expansion device 5, and changes into a low-pressure gas-liquid refrigerant. The gas-liquid refrigerant is guided to the outdoor heat exchanger 4 that functions as an evaporator, vaporized by heat exchange with air herein, and changes into a low-temperature and low-pressure gas-phase refrigerant. The low-temperature and low-pressure gas-phase refrigerant that has passed through the outdoor heat exchanger 4 is sucked into the horizontal compressor 2 via the four-way valve 3 and accumulator 8.
Next, a specific configuration of the horizontal compressor 2 used for the air conditioner 1 will be described with reference to
The hermetic container 10 according to the present embodiment is divided into two elements of a container body 10a and a lid member 10b. The container body 10a includes a cylindrical outer peripheral wall 10c, and one axial end of the container body 10a is integrally closed by a bottom plate portion 10d. The bottom plate portion 10d is continuous with the outer peripheral wall 10c and is curved in a spherical shape so as to protrude axially from the container body 10a. Furthermore, the container body 10a includes a circular opening end 10e at the other end opposite to the bottom plate portion 10d.
The lid member 10b is fitted to the opening end 10e of the container body 10a, shield-welding is carried out on the entire circumference of the opening end 10e, and the lid member 10b is fixed to the container body 10a. Therefore, the opening end 10e of the container body 10a is airtightly closed by the lid member 10b.
As illustrated in
The electric motor unit 12 is an element that drives the compression mechanism unit 11, and the electric motor unit 12 is connected to the compression mechanism unit 11 via a rotary shaft 13. The electric motor unit 12 is housed in the container body 10a at a position near the lid member 10b relative to the compression mechanism unit 11. Therefore, the compression mechanism unit 11 and the electric motor unit 12 are aligned in an axial direction of the hermetic container 10.
As illustrated in
The joint port 16 is an element configured to guide a gas-phase refrigerant from the accumulator 8 to the cylinder chamber of the compression mechanism unit 11, and the joint port 16 protrudes from an outer peripheral surface of the container body 10a at a position corresponding to the compression mechanism unit 11. As illustrated in
Furthermore, in the hermetic container 10 according to the present embodiment, a lubricant pipe 17 is mounted to the center of the lid member 10b. The lubricant pipe 17 is an element that is used to seal lubricant inside the hermetic container 10, and the lubricant pipe 17 is located, for example, on a center line O1 of the hermetic container 10 in a coaxial manner.
As illustrated in
A suction pipe 18 that constitutes part of the circulation circuit 7 is connected to one end of the accumulator 8. The suction pipe 18 is connected to the fourth port 3d of the four-way valve 3. Furthermore, a refrigerant return pipe 19 that constitutes part of the circulation circuit 7 is connected to the other end of the accumulator 8. The refrigerant return pipe 19 extends between the other end of the accumulator 8 and the joint port 16 of the hermetic container 10 and has a downstream end in a refrigerant flow direction that is fixed to an opening end of the joint port 16 by means such as brazing.
As illustrated in
The first leg 21 is an integrally formed member obtained by subjecting a metal sheet material, such as cold-rolled sheet steel or hot-rolled sheet steel, to sheet metal pressing, and the first leg 21 has an elongated shape. The first leg 21 is fixed to a holder 23 secured to the outer peripheral wall 10c of the container body 10a, by means such as screwing. According to this embodiment, the first leg 21 extends in a direction orthogonal to the center line O1 of the hermetic container 10, near the opening end 10e of the container body 10a corresponding to the electric motor unit 12.
Therefore, the first leg 21 has a first end portion 21a and a second end portion 21b that are separated in a radial direction of the hermetic container 10. The first end portion 21a and the second end portion 21b have a flat shape facing the installation surface G, and mounting holes 24 are defined in the first end portion 21a and the second end portion 21b.
The second leg 22 is an integrally formed member obtained by subjecting a metal sheet material, such as cold-rolled sheet steel or hot-rolled sheet steel, to sheet metal pressing, and the second leg 22 is located at an end of the hermetic container 10 corresponding to the compression mechanism unit 11.
More specifically, as illustrated in
The base portion 26 is fixed to the bottom plate portion 10d of the container body 10a by means such as welding. By the fixing, the base portion 26 is held in an attitude orthogonal to the center line O1 of the hermetic container 10, and the outer periphery of the base portion 26 expands around the hermetic container 10.
According to the present embodiment, the outer periphery of the base portion 26 is defined by a first to fourth outer peripheral edges 26a, 26b, 26c, and 26d. The first outer peripheral edge 26a extends radially from the hermetic container 10 at a position adjacent to the joint port 16. The second outer peripheral edge 26b is located on the opposite side from the first outer peripheral edge 26a across the hermetic container 10, and extends radially from the hermetic container 10, parallel to the first outer peripheral edge 26a. The third outer peripheral edge 26c linearly connects one end of the first outer peripheral edge 26a and one end of the second outer peripheral edge 26b. The fourth outer peripheral edge 26d linearly connects the other end of the first outer peripheral edge 26a and the other end of the second outer peripheral edge 26b.
As best illustrated in
In other words, the first support portion 30 extends in a direction orthogonal to the center line O1 of the hermetic container 10 so as to be parallel to the first leg 21 and extends from the first outer peripheral edge 26a of the base portion 26 in a direction away from the joint port 16. Therefore, as illustrated in
Furthermore, the first support portion 30 has a first end portion 30a and a second end portion 30b that are separated in a radial direction of the hermetic container 10. The first end portion 30a and the second end portion 30b are formed into a flat shape and located on the same plane as the first end portion 21a and the second end portion 21b of the first leg 21. A mounting hole 32 is defined in each of the first end portion 30a and the second end portion 30b.
According to the present embodiment, the first support portion 30 has a bent portion 33 that is located between the first end portion 30a and the second end portion 30b. The bent portion 33 is an element configured to reinforce the first support portion 30, and the bent portion 33 has a shape that is integrally bent in a direction away from the hermetic container 10.
The second support portion 31 is an element that is used in the process of manufacturing the horizontal compressor 2, for example, to support the hermetic container 10 in a standing attitude on a transport pallet 35 placed on a factory floor F, and in the present embodiment, the outer periphery of the base portion 26 also serves as the second support portion 31. Therefore, the first support portion 30 and the second support portion 31 have an integrated structure in which the first support portion 30 and the second support portion 31 are maintained in an orthogonal positional relationship.
First to third fitting holes 36a, 36b, and 36c are defined in the second support portion 31. The first to third fitting holes 36a, 36b, and 36c are elements into which three support pins 37 protruding upward from the transport pallet 35 are removably fitted to support the hermetic container 10 in a standing attitude. Fitting the tips of the support pins 37 into the first to third fitting holes 36a, 36b, and 36c fixedly determines the position of the hermetic container 10 with respect to the transport pallet 35.
According to the present embodiment, as illustrated in
In other words, the second fitting hole 36b and the third fitting hole 36c are provided at positions not immediately above the center line O1 of the hermetic container 10 while the hermetic container 10 is in a horizontal attitude. When the center of the second fitting hole 36b and the center of the third fitting hole 36c are joined by a straight line X1, the straight line X1 extends laterally so as to be parallel to the installation surface G.
As illustrated in
A reinforcing rib 38 is formed integrally with the second to fourth outer peripheral edges 26b, 26c, and 26d of the base portion 26. The reinforcing rib 38 is formed by bending the second to fourth outer peripheral edges 26b, 26c, and 26d of the base portion 26 backward at a right angle in a direction away from the first leg 21. The reinforcing rib 38 is continuous with the first end portion 30a and second end portion 30b of the first support portion 30, and the bending has a bending height increasing toward the first end portion 30a and the second end portion 30b. Therefore, the reinforcing rib 38 extends between the first support portion 30 and the second support portion 31.
On the other hand, in the final stage of assembling the horizontal compressor 2, injection of lubricant from the lubricant pipe 17 into the hermetic container 10 and start-up check are performed. From the viewpoint of manufacturability and quality assurance of the horizontal compressor 2, it is preferable to perform injection of lubricant and start-up check on the hermetic container 10 in a vertical standing attitude.
In the present embodiment, the base portion 26 of the second leg 22 also functions as the second support portion 31, and the first to third fitting holes 36a, 36b, and 36c are defined in the second support portion 31. Therefore, in order to stand the hermetic container 10, the tips of the support pins 37 protruding upward from the transport pallet 35 positioned horizontally are fitted into the first to third fitting holes 36a, 36b, and 36c.
Thus, as illustrated in
According to the first embodiment, the second leg 22 fixed to the bottom plate portion 10d of the hermetic container 10 integrally includes the first support portion 30 that is used to install the hermetic container 10 in a horizontal attitude on the installation surface G, and the second support portion 31 that is used to stand the hermetic container 10 on the transport pallet 35.
Accordingly, the second leg 22 has an integrated structure with both of the function of supporting the hermetic container 10 in a horizontal attitude and the function of standing the hermetic container 10. Therefore, the horizontal compressor 2 can be provided that is reduced in the number of components and labor-hours for assembling and thereby cost-effective, in comparison with a horizontal compressor that includes separate elements to perform the two functions.
Moreover, according to the present embodiment, the first support portion 30 of the second leg 22 extends in a direction away from the joint port 16 of the hermetic container 10, ensuring the sufficient space S between the joint port 16 and the first support portion 30. Therefore, in brazing the refrigerant return pipe 19 to the joint port 16, even if the second leg 22 is already welded to the hermetic container 10, the first support portion 30 of the second leg 22 does not hinder the brazing, improving workability in assembling the horizontal compressor 2.
In addition, the first support portion 30 does not hinder covering the refrigerant return pipe 19 or joint port 16 with a heat insulating material, facilitating attaching the heat insulating material to the refrigerant return pipe 19 or the joint port 16.
Furthermore, the second leg 22 includes the reinforcing rib 38 extending between the first support portion 30 and the second support portion 31, and the reinforcing rib 38 is continuous with the second outer peripheral edge 26b, third outer peripheral edge 26c, and fourth outer peripheral edge 26d of the base portion 26. Therefore, the strength and rigidity of the first support portion 30 that is bent at a right angle from the base portion 26 are improved, supporting the horizontal compressor 2 in a stable attitude on the installation surface G.
Furthermore, the reinforcing rib 38 surrounds the base portion 26 that also functions as the second support portion 31 in cooperation with the first support portion 30, improving the strength and rigidity of the base portion 26. Therefore, when the horizontal compressor 2 is stood on the transport pallet 35, the support pins 37 of the transport pallet 35 can be firmly received by the base portion 26. Thus, the horizontal compressor 2 can be stood in a stable attitude on the transport pallet 35.
According to the present embodiment, as illustrated in
Thus, the second fitting hole 36b or third fitting hole 36c is located at a position not immediately above the center line O1 of the hermetic container 10, preventing the second fitting hole 36b or the third fitting hole 36c from greatly expanding above the hermetic container 10 in a horizontal attitude.
In addition, the straight line X1 joining the center of the second fitting hole 36b and the center of the third fitting hole 36c extends laterally so as to be parallel to the installation surface G, thus, reducing, as much as possible, a height dimension from the second outer peripheral edge 26b located at the upper edge of the base portion 26 to the installation surface G while the hermetic container 10 is in a horizontal attitude.
In other words, when the horizontal compressor 2 is installed in a horizontal attitude on the installation surface G, an expansion height of the second leg 22 with respect to the installation surface G can be minimized. Therefore, although the second leg 22 has both of the function of supporting the hermetic container 10 in a horizontal attitude and the function of standing the hermetic container 10, the second leg 22 can be made compact.
According to the present embodiment, the pitch L1 between the mounting holes 24 of the first leg 21 and the pitch L3 between the mounting holes 32 of the first support portion 30 of the second leg 22 are larger than the pitch L2 between the second fitting hole 36b and the third fitting hole 36c. Therefore, it is possible to sufficiently secure an arrangement interval of the vibration dampers 40 fitted into the mounting holes 24 and 32, supporting the horizontal compressor 2 in a stable attitude on the installation surface G.
Furthermore, the second fitting hole 36b and the third fitting hole 36c are elements that are used to temporarily stand the hermetic container 10 in the manufacturing process of the horizontal compressor 2, and the pitch L2 between the second fitting hole 36b and the third fitting hole 36c may be smaller than the pitch L3 between the mounting holes 32 without any particular problem.
At the same time, by making the pitch L2 between the second fitting hole 36b and the third fitting hole 36c smaller than the pitch L3 between the mounting holes 32, the whole length of the second outer peripheral edge 26b of the base portion 26 can be reduced, and this advantageously contributes to compactification of the second leg 22.
As best illustrated in
Furthermore, a base portion 26 forming the second support portion 31 includes a peripheral wall 51 bent backward at a right angle from second to fourth outer peripheral edges 26b, 26c, and 26d. The peripheral wall 51 protrudes in a direction away from the hermetic container 10 while the hermetic container 10 is stood. The peripheral wall 51 includes an end edge 52 that is located on the same plane as the front end edges 50 of the first support portion 30.
The peripheral wall 51 has a pair of clearance portions 53a and 53b that are cutouts opening in the end edge 52. Due to the presence of the clearance portions 53a and 53b, the end edge 52 is spatially divided into portions separated from each other in the circumferential direction of the hermetic container 10. In the peripheral wall 51, an intermediate portion 55 located between the clearance portions 53a and 53b is located on the opposite side from the first support portion 30 across the hermetic container 10.
Furthermore, a reinforcing rib 56 is formed in the intermediate portion 55 of the peripheral wall 51. The reinforcing rib 56 is configured by, for example, partially bending the intermediate portion 55 of the peripheral wall 51 in a direction away from the first support portion 30.
In addition, in the present embodiment, the third outer peripheral edge 26c and the fourth outer peripheral edge 26d of the base portion 26 each have a portion that is continuous with the first support portion 30, and the portions incline in directions away from each other. Therefore, the base portion 26 includes a pair of expanded portions 57a and 57b that are expanded radially from the hermetic container 10 at positions near the first support portion 30, and a pitch L1 between mounting holes 32 of the first support portion 30 is extended by the lengths of the expanded portions 57a and 57b, as compared with that in the first embodiment.
Furthermore, a pair of through-holes 58a and 58b are defined in the expanded portions 57a and 57b of the base portion 26 for weight reduction. The through-holes 58a and 58b are separately arranged on both sides of the hermetic container 10.
According to the second embodiment, the front end edges 50 of the first support portion 30 and the end edge 52 of the peripheral wall 51 of the base portion 26 are located on the same plane. Therefore, as illustrated in
This makes it possible to temporarily place the hermetic container 10 in a standing attitude on the factory floor F by using the front end edges 50 of the first support portion 30 and the end edge 52 of the peripheral wall 51. Thus, an extremely advantageous structure is provided, for example, to temporarily stand the hermetic container 10 before placing on the transport pallet 35, in the final stage of assembling the horizontal compressor 2.
Moreover, the end edge 52 of the peripheral wall 51 is spatially divided from the front end edges 50 by the clearance portions 53a and 53b in the circumferential direction of the hermetic container 10. Therefore, the end edge 52 will abut on the floor F at three positions along the circumferential direction of the hermetic container 10, suppressing rattling or wobbling of the hermetic container 10 stood on the floor F.
Furthermore, the intermediate portion 55 of the peripheral wall 51 is reinforced by the reinforcing ribs 56, and thus, the strength and rigidity of the intermediate portion 55 can be sufficiently ensured, and the hermetic container 10 can be firmly supported by the intermediate portion 55 of the peripheral wall 51.
At the same time, the presence of the reinforcing ribs 56 makes it possible to reduce the thickness of the peripheral wall 51 and further the base portion 26, thereby reducing the weight of the second leg 22.
As illustrated in
The first lid 61 that has a substantially hemispherical shape is fitted to one opening end 60b of the container body 60, shield-welding is carried out on the entire circumference of the opening end 60b, and the first lid 61 is fixed to the container body 60. Therefore, the one opening end 60b of the container body 60 is airtightly closed by the first lid 61. The first lid 61 protrudes from the one opening end 60b of the container body 60 to the outside of the container body 60, and a circumferentially continuous weld bead 63 is formed at a boundary between the first lid 61 and the container body 60.
The second lid 62 that has a substantially hemispherical shape is fitted to the other opening end 60c of the container body 60, shield-welding is carried out on the entire circumference of the opening end 60c, and the second lid 62 is fixed to the container body 60. Therefore, the other opening end 60c of the container body 60 is airtightly closed by the second lid 62. The second lid 62 protrudes from the other opening end 60c of the container body 60 to the outside of the container body 60, and a circumferentially continuous weld bead 64 is formed at a boundary between the second lid 62 and the container body 60. The weld beads 63 and 64 can be also referred to as welded portions.
According to the present embodiment, a second leg 22 that has both of a function of supporting the hermetic container 10 in a horizontal attitude and a function of standing the hermetic container 10 is fixed to an outer peripheral surface of the second lid 62 by means such as welding.
As illustrated in
On the other hand, a first leg 21 is located in the vicinity of the weld bead 63 on the side of the first lid 61, but the first leg 21 only extends radially from the hermetic container 10. Therefore, as illustrated in
Incidentally, the work of welding the container body 60, the first lid 61, and the second lid 62 is manually carried out by an operator. In this case, for example, a fitting error that occurs at a fitting portion between the opening end 60b of the container body 60 and the first lid 61, a fitting error that occurs at a fitting portion between the opening end 60c of the container body 60 and the second lid 62, a work mistake during welding work, or the like may cause a welding defect, such as a blowhole or a pit, at welded portions of the container body 60, the first lid 61, and the second lid 62.
When a welding defect occurs, repair work using a welding electrode is required after completion of all welding steps for the hermetic container 10. The repair work is performed manually by the operator with the hermetic container 10 standing.
Welding defects are highly likely to occur at a welding start point of shield-welding or at a welding end point overlapping the welding start point. In particular, if a welding defect is found in the hermetic container 10 after welding the second leg 22 to the hermetic container 10, the second leg 22 may hinder, making it difficult or impossible to apply the welding electrode to a position where the welding defect occurs, depending on the shape or size of the second leg 22.
According to the present embodiment, wide open space is provided around the weld bead 63, at a welded position between the container body 60 and the first lid 61. Therefore, no matter where the welding start point and the welding end point of the shield-welding are located in the circumferential direction of the hermetic container 10, it is possible to apply the welding electrode to the welding start point or the welding end point of the shield-welding where a welding defect occurs, for repair work.
On the other hand, when the hermetic container 10 is viewed in an axial direction, the first outer peripheral edge 26a, the third outer peripheral edge 26c, and the fourth outer peripheral edge 26d of the base portion 26 greatly expand relative to the second lid 62 in a direction orthogonal to the center line O1 of the hermetic container 10, in the vicinity of a welded portion between the container body 60 and the second lid 62.
Therefore, when the welding electrode is applied to a position where a welding defect occurs, from a side of the second lid 62, the base portion 26 hinders, making it difficult or impossible to apply the welding electrode to the weld bead 64, at positions corresponding to the first outer peripheral edge 26a, the third outer peripheral edge 26c, and the fourth outer peripheral edge 26d of the base portion 26.
In the present embodiment, when the hermetic container 10 is viewed in the axial direction, the second outer peripheral edge 26b of the base portion 26 does not expand radially outward from the hermetic container 10 relative to the weld bead 64, and in the vicinity of the second outer peripheral edge 26b of the base portion 26, wide open space is maintained around the weld bead 64. Therefore, in the present embodiment, as illustrated in
This configuration enables application of the welding electrode within a range of a predetermined angle α with respect to the weld bead 64, even when a welding defect at the welding start point E of the shield-welding is found after welding the second leg 22 to the hermetic container 10. The predetermined angle α is preferably 30° to 60°, and it is particularly preferable to apply the welding electrode to the weld bead 64 at an angle of 45°.
Therefore, it is possible to readily perform repair work for the welding defect without hindrance by the base portion 26.
In the third embodiment, the welding start point E is located in the vicinity of the second outer peripheral edge 26b of the base portion 26 that does not expand radially outward from the hermetic container 10, but the welding start point E of the shield-welding may be located in the vicinity of a portion of the base portion 26 that has a minimum amount of radially outward expansion from the hermetic container 10.
While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the inventions.
This application is a Continuation Application of PCT Application No. PCT/JP2017/046463, filed Dec. 25, 2017, the entire contents of which are incorporated herein by reference.
Number | Name | Date | Kind |
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20040057849 | Skinner | Mar 2004 | A1 |
20050129559 | Hasegawa | Jun 2005 | A1 |
20070077161 | Roller | Apr 2007 | A1 |
20070116582 | Skinner | May 2007 | A1 |
Number | Date | Country |
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1 770 281 | Apr 2007 | EP |
2004026985 | Jan 2004 | JP |
2005-83269 | Mar 2005 | JP |
WO 2004-011809 | Feb 2004 | WO |
Entry |
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English Machine Translation of JP 2004-26985 (Year: 2004). |
Microfilm of the specification and drawings annexed to the request of Japanese Utility Model Application No. 126503/1983 (Laid-open No. 34194/1985), issued Mar. 8, 1985 to Mitsubishi Electronics Corp. |
Microfilm of the specification and drawings annexed to the request of Japanese Utility Model Application No. 11959/1979 (Laid-open No. 112191/1980), issued Aug. 7, 1980 to Mitsubishi Electronics Corp. |
International Search Report dated Mar. 13, 2018 in connection with PCT International Application No. PCT/JP2017/046463. |
Written Opinion (form PCT/ISA/237) dated Mar. 13, 2018 in connection with PCT International Application No. PCT/JP2017/046463. |
European search report dated Jun. 16, 2021 in corresponding European Patent Application No. 17 93 6810.5. |
Number | Date | Country | |
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20200318639 A1 | Oct 2020 | US |
Number | Date | Country | |
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Parent | PCT/JP2017/046463 | Dec 2017 | US |
Child | 16904372 | US |