JP2010150973A - Method for manufacturing compressor, and compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a compressor manufacturing process, and to provide a compressor which is pipe-connected to a distortion-free sealed casing. <P>SOLUTION: This method for manufacturing the compressor having joint pipes 5, 8 holding inlet tubes 4, 7 connected to the pipes 3, 6 for supplying a refrigerant from the outside of the sealed casing 10 into a cylinder chamber, and a reinforcing member 9 for fixing the joint pipes 5, 8 to the sealed casing 10, includes: a welding step of fixing the reinforcing member 9 to the sealed casing 10 by projection welding; a first brazing step of fixing the joint pipes 5, 8 to the reinforcing member 9 by brazing; and a second brazing step of arranging one ends of the inlet tubes 4, 7 in the inlet holes 33a, 36a of a front cylinder 33 and a rear cylinder 36, and fixing the other ends thereof to the joint pipes 5, 8 by brazing. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a compressor including a reinforcing member for fixing a joint pipe to a hermetic casing, and a compressor.

A conventional rotary compressor includes a cylinder having a suction hole communicating with a cylinder chamber, a sealed casing that houses the cylinder, a joint pipe that holds an inlet tube, and a reinforcing pipe for fixing the joint pipe to the sealed casing. And a member. The inlet tube is connected to a pipe for supplying a refrigerant from the outside of the sealed casing to the cylinder chamber. As shown in FIG. 10, the manufacturing method for manufacturing the compressor described above includes a first tube expansion step (S21) for adjusting the shape of the sealed casing, and a hole for forming a hole for attaching the reinforcing member in the sealed casing. An opening step (S22), a welding step (S23) for fixing the reinforcing member to the sealed casing by arc welding, a second pipe expanding step (S24) for adjusting the shape of the sealed casing, and the joint pipe as a reinforcing member. First brazing step (S25) for fixing by brazing, brazing the pipe with respect to the inlet tube, placing one end of the inlet tube in the suction hole of the cylinder, and brazing the other end with respect to the joint pipe In general, the compressor is completed (S27) by the second brazing step (S26). And. Here, in the welding step (S23), the reinforcing member is often fixed to the sealed casing by arc welding (see, for example, Patent Document 1).
JP-A-7-117042

  However, in the compressor manufacturing method described above, since arc welding with a large heat input is used in the welding step (S23), the hermetic casing is greatly distorted. As a result, the hole between the joint pipe and the suction hole of the cylinder There is a problem in that the center of the inlet tube is displaced and one end of the inlet tube that has been inserted through the hole of the joint pipe cannot be inserted into the suction hole of the cylinder. For this reason, a second pipe expansion step (S24) is provided after the welding step (S23), and a pipe expansion step is required to adjust the shape of the sealed casing so that the center of the hole of the joint pipe and the suction hole of the cylinder are aligned.

  Therefore, the present invention has been made to solve the above-described problems, and a compressor manufacturing method capable of simplifying the manufacturing process and piping connection to a hermetic casing without distortion. It aims at providing the compressor which can be performed.

  According to a first aspect of the present invention, there is provided a compressor manufacturing method comprising: a cylinder having a suction hole that communicates with a cylinder chamber; a sealed casing that houses the cylinder; and a refrigerant that is supplied from the outside of the sealed casing to the cylinder chamber. A method of manufacturing a compressor comprising: a joint pipe that holds an inlet tube connected to a pipe for piping; and a reinforcing member for fixing the joint pipe to the hermetic casing, wherein the reinforcing member is A welding step of fixing the airtight casing by projection welding, a first brazing step of fixing the joint pipe to the reinforcing member by brazing, and one end of the inlet tube in the suction hole of the cylinder And a second brazing step of fixing the other end to the joint pipe by brazing.

  In this compressor manufacturing method, in the welding process, the reinforcing member is fixed to the hermetic casing by projection welding, which has a smaller amount of heat input than arc welding. Therefore, compared with the case where the reinforcing member is fixed to the sealed casing by arc welding, the sealed casing is hardly distorted. Therefore, it is possible to suppress the center of the joint pipe hole and the cylinder suction hole from being shifted in the welding process. Moreover, the compressor which improved the compressive strength of the location where the reinforcement member was fixed in the airtight casing can be manufactured.

  A compressor manufacturing method according to a second invention is a compressor manufacturing method according to the first invention, wherein the first brazing step is performed before the welding step. .

  In this compressor manufacturing method, the joint pipe is fixed to the reinforcing member before being fixed to the hermetic casing by brazing. Therefore, compared with the case where the joint pipe is fixed to the reinforcing member after being fixed to the hermetic casing by brazing, the heat capacity required for the brazing operation is reduced, and the working efficiency is improved. .

  A compressor according to a third aspect of the present invention includes a cylinder having a suction hole communicating with a cylinder chamber, a sealed casing that accommodates the cylinder therein, and a pipe for supplying refrigerant to the cylinder chamber from the outside of the sealed casing And a reinforcing member for fixing the joint tube to the hermetic casing, the reinforcing member being attached to the hermetic casing. The joint pipe is fixed to the reinforcing member by brazing, and one end of the inlet tube is disposed in the suction hole of the cylinder and the other end is the joint pipe. It is characterized by being fixed by brazing.

  In this compressor, the reinforcing member is fixed to the hermetic casing by projection welding, which has a smaller heat input than arc welding. Therefore, compared with the case where the reinforcing member is fixed to the sealed casing by arc welding, the sealed casing is hardly distorted. Therefore, it is possible to suppress the center of the joint pipe hole and the cylinder suction hole from being shifted in the welding process. Moreover, the pressure strength of the location where the reinforcing member is fixed in the hermetic casing can be improved.

  As described above, according to the present invention, the following effects can be obtained.

  In the first invention, in the welding process, the reinforcing member is fixed to the hermetic casing by projection welding having a smaller heat input than arc welding. Therefore, compared with the case where the reinforcing member is fixed to the sealed casing by arc welding, the sealed casing is hardly distorted. Therefore, it is possible to suppress the center of the joint pipe hole and the cylinder suction hole from being shifted in the welding process. Moreover, the compressor which improved the compressive strength of the location where the reinforcement member was fixed in the airtight casing can be manufactured.

  In the second invention, the joint pipe is fixed to the reinforcing member before being fixed to the sealed casing by brazing. Therefore, compared with the case where the joint pipe is fixed to the reinforcing member after being fixed to the hermetic casing by brazing, the heat capacity required for the brazing operation is reduced, and the working efficiency is improved. .

  In the third invention, the reinforcing member is fixed to the hermetic casing by projection welding having a smaller heat input than arc welding. Therefore, compared with the case where the reinforcing member is fixed to the sealed casing by arc welding, the sealed casing is hardly distorted. Therefore, it is possible to suppress the center of the joint pipe hole and the cylinder suction hole from being shifted in the welding process. Moreover, the pressure strength of the location where the reinforcing member is fixed in the hermetic casing can be improved.

(First embodiment)
Hereinafter, a rotary compressor and a manufacturing method thereof according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a rotary compressor according to the first embodiment of the present invention. FIG. 2 is an enlarged view of a portion surrounded by an alternate long and short dash line in the rotary compressor of FIG.

  The rotary compressor 1 compresses the compressed refrigerant from which moisture introduced from the accumulator 2 has been removed, and discharges the compressed refrigerant from the discharge passage 11 disposed at the upper end portion thereof.

  As shown in FIG. 1, the rotary compressor 1 includes a hermetic casing 10, and a drive mechanism 20 and a compression mechanism 30 that are disposed in the hermetic casing 10. The rotary compressor 1 is a so-called high-pressure dome type compressor, and a compression mechanism 30 is disposed below the drive mechanism 20 in the sealed casing 10. In addition, lubricating oil 40 supplied to each sliding portion of the compression mechanism 30 is stored in the lower portion of the hermetic casing 10.

  The drive mechanism 20 is provided to drive the compression mechanism 30 and includes a motor 21 serving as a drive source and a shaft 22 attached to the motor 21.

  The motor 21 includes a rotor 21a and a stator 21b disposed on the radially outer side of the rotor 21a via an air gap. A shaft 22 is rotatably attached to the rotor 21a. And the rotor 21a has the rotor main body which consists of a laminated | stacked electromagnetic steel plate, and the magnet embed | buried under this rotor main body. The stator 21b has a stator main body made of iron and a coil wound around the stator main body. The motor 21 rotates the rotor 21 a together with the shaft 22 by electromagnetic force generated in the stator 21 b by passing an electric current through the coil.

  The shaft 22 rotates with the rotor 21a described above to rotate the roller 34 and the roller 37 of the compression mechanism 30. The shaft 22 is provided with an eccentric portion 22a so as to be positioned in a cylinder chamber B1 of the front cylinder 33 described later, and is provided with an eccentric portion 22b so as to be positioned in a cylinder chamber B2 of the rear cylinder 36. . Rollers 34 and 37 are attached to these eccentric portions 22a and 22b, respectively. Accordingly, as the shaft 22 rotates, the roller 34 attached to the eccentric portion 22a rotates in the cylinder chamber B1, and the roller 37 attached to the eccentric portion 22b rotates in the cylinder chamber B2. The eccentric portion 22a and the eccentric portion 22b are disposed at positions shifted by 180 ° in the rotation direction of the shaft 22.

  On the other hand, the compression mechanism 30 is provided to compress the refrigerant sucked from the accumulator 2 through the pipe 3 and the pipe 6. The refrigerant discharged by the compression mechanism 30 passes through the air gap between the stator 21b and the rotor 21a of the drive mechanism 20, cools the drive mechanism 20, and is then discharged from the discharge passage 11. The compression mechanism 30 includes a front muffler 31, a front head 32, a front cylinder 33, a middle plate 35, a rear cylinder 36, and a downward direction along the rotation axis of the shaft 22 of the drive mechanism 20. A rear head 38 and a rear muffler 39 are provided.

  The front muffler 31 forms a muffler space A1 between the front head 32 and the noise due to the refrigerant discharge. The front muffler 31 is attached so as to cover the front head 32. The front muffler 31 is fastened and fixed by a front head 32 and bolts 41. Then, the bolt 41 is fastened to the screw hole of the front cylinder 33 via the front muffler 31 and the front head 32. Further, the front muffler 31 is formed with a discharge hole (not shown) through which the compressed refrigerant is discharged from the muffler space A1.

  The front head 32 is disposed on the upper side of the front cylinder 33 and closes an opening above the cylinder chamber B1 of the front cylinder 33. The front head 32 has a bearing hole into which the shaft 22 is inserted. The front head 32 is provided with a discharge port (not shown) through which the refrigerant compressed by the rotational drive of the roller 34 in the cylinder chamber B1 of the front cylinder 33 is discharged. The refrigerant discharged from the discharge port is discharged from a discharge hole formed in the front muffler 31 through the above-described muffler space A1. Further, a discharge valve (not shown) that opens and closes the outlet of the discharge port and a pressing member (not shown) that restricts the opening of the discharge valve are provided in the valve storage chamber.

  The front cylinder 33 is provided with a cylinder chamber B1 in which a roller 34 that moves eccentrically with the rotation of the shaft 22 is disposed. The cylinder chamber B1 and the muffler space A1 are communicated with each other via the discharge port (not shown). Therefore, the refrigerant compressed by the eccentric motion of the roller 34 attached to the eccentric portion 22a of the shaft 22 is guided from the cylinder chamber B1 to the muffler space A1 through the discharge port. Further, as shown in FIG. 2, the front cylinder 33 has a suction hole 33a communicating with the cylinder chamber B1. One end of the inlet tube 4 is press-fitted into the suction hole 33a. The other end of the inlet tube 4 is connected to a pipe 3 for supplying a refrigerant from the outside of the sealed casing 10 to the cylinder chamber B1 by a brazing material R1. The inlet tube 4 is connected to the joint pipe 5 by a brazing material. Fixed by R1. The joint pipe 5 is fixed to a reinforcing member 9 fixed to the hermetic casing 10 by a brazing material R3. The reinforcing member 9 is fixed to the hole 10a formed in the sealed casing 10 by projection welding.

  The middle plate 35 is disposed between the front cylinder 33 and the rear cylinder 36. Then, the opening below the cylinder chamber B1 of the front cylinder 33 is closed, and the opening above the cylinder chamber B2 of the rear cylinder 36 is closed.

  The rear cylinder 36 is provided with a cylinder chamber B <b> 2 in which a roller 37 that moves eccentrically with the rotation of the shaft 22 is disposed. The cylinder chamber B2 and a muffler space A2 described later are communicated with each other via a discharge port (not shown). Therefore, the refrigerant compressed by the eccentric movement of the roller 37 attached to the eccentric portion 22b of the shaft 22 is guided from the cylinder chamber B2 to the muffler space A2 through the discharge port. Further, as shown in FIG. 2, the rear cylinder 36 has a suction hole 36a that communicates with the cylinder chamber B2. One end of the inlet tube 7 is press-fitted into the suction hole 36a. The other end of the inlet tube 7 is connected to a pipe 6 for supplying a refrigerant from the outside of the sealed casing 10 to the cylinder chamber B2 by a brazing material R4. The inlet tube 7 is connected to the joint pipe 8 by a brazing material R4. Fixed. The joint pipe 8 is fixed to a reinforcing member 9 fixed to the hermetic casing 10 by a brazing material R6.

  The rear head 38 is disposed below the rear cylinder 36 and closes the opening below the cylinder chamber B2 of the rear cylinder 36. The rear head 38 has a bearing hole into which the shaft 22 is inserted. The rear head 38 is provided with a discharge port (not shown) through which the refrigerant compressed by the rotational drive of the roller 37 in the cylinder chamber B2 of the rear cylinder 36 is discharged. The refrigerant discharged from the discharge port passes through holes (not shown) formed in the rear head 38, the rear cylinder 36, the middle plate 35, the front cylinder 33, and the front head 32 through a muffler space A2 described later. And is discharged into the muffler space A1 of the front muffler 31. The rear head 38 is attached with a discharge valve (not shown) that opens and closes the outlet of the discharge port. The rear head 38 is provided with a plurality of fastening holes through which the bolts 42 can pass.

  The muffler space A2 is formed between the rear muffler 39 and the rear head 38 to reduce noise associated with refrigerant discharge. Then, the two bolts 42 are tightened in the screw holes of the front cylinder 33 through the two through holes formed in the rear muffler 39, the rear head 38, the rear cylinder 36, and the middle plate 35. On the other hand, the rear muffler 39 is fixed.

  Next, the manufacturing method of the rotary compressor 1 mentioned above is demonstrated with reference to FIGS. FIG. 3 is a diagram for explaining the procedure of the manufacturing method of the rotary compressor of FIG. 4 is a diagram illustrating the welding process of FIG. 3, FIG. 5 is a diagram illustrating the first brazing process of FIG. 3, and FIG. 6 is a diagram illustrating the second brazing process of FIG. It is a figure explaining.

  In the manufacturing method of the rotary compressor 1, as shown in FIG. 3, first, the shape of the sealed casing 10 is adjusted in the pipe expansion step (S1). Thereafter, a hole 10a for attaching the reinforcing member 9 is formed in the hermetic casing 10 in the drilling step (S2). Next, the reinforcing member 9 is fixed to the sealed casing 10 by projection welding in the welding step (S3). In this welding step (S3), as shown in FIG. 4A, the reinforcing member 9 is disposed so as to fit into the hole 10a from the inner side of the sealed casing 10 (left side in FIG. 4A). Then, the side surface of the reinforcing member 9 and the inner peripheral surface of the hole 10a of the sealed casing 10 are joined by projection welding, so that the reinforcing member 9 is attached to the sealed casing 10 as shown in FIG. Fixed.

  Next, in the first brazing step (S4), the joint pipes 5 and 8 are fixed to the reinforcing member 9 by brazing materials R3 and R6, respectively. In this first brazing step (S4), as shown in FIG. 5A, the joint pipes 5 and 8 are connected to the reinforcing member 9 2 from the outside of the reinforcing member 9 (the right side in FIG. 5A). It arrange | positions so that it may fit with respect to one recessed part. Then, the joint pipes 5 and 8 are fixed to the reinforcing member 9 by brazing materials R3 and R6, respectively, as shown in FIG. 5 (b).

  Next, in the second brazing step (S5), after components such as the front cylinder 33, the rear cylinder 36, and the motor 21 are assembled in the hermetic casing 10, the pipe 3 is brazed to the inlet tube 4. In addition to being connected by R1, the inlet tube 4 is fixed to the joint pipe 5 by the brazing material R1, the pipe 6 is connected to the inlet tube 7 by the brazing material R4, and the inlet tube 7 is connected to the joint pipe 8 by the brazing material. Fixed by R4. In this second brazing step (S5), as shown in FIGS. 6 (a) and 6 (b), one end of each of the inlet tubes 4, 7 is connected to the suction holes 33a of the front cylinder 33 and the rear cylinder 36, After the pipes 3 and 6 are inserted into the other ends of the inlet tubes 4 and 7, the pipes 3 and 6, the inlet tubes 4 and 7, and the joint pipes 5 and 8 are respectively brazed. Fixed. The rotary compressor 1 is completed through the above steps (S6).

[Features of Manufacturing Method of Rotary Compressor 1 of First Embodiment]
The manufacturing method of the rotary compressor 1 of the first embodiment has the following characteristics.

  In the manufacturing method of the rotary compressor 1 of this embodiment, in the welding process, the reinforcing member 9 is fixed to the sealed casing 10 by projection welding in which the heat input is smaller than that of arc welding. Therefore, compared with the case where the reinforcing member 9 is fixed to the sealed casing 10 by arc welding, the sealed casing 10 is hardly distorted. Therefore, in the welding process, the centers of the holes of the joint pipes 5 and 8 and the suction hole 33a of the front cylinder 33 and the suction hole 36a of the rear cylinder 36 are not shifted, and it is not necessary to provide a pipe expansion process after the welding process. . Thereby, the manufacturing process of a compressor is simplified. Moreover, the compressor which improved the pressure strength of the location where the member 9 for reinforcement in the airtight casing 10 was fixed can be manufactured.

(Second Embodiment)
Next, the manufacturing method of the rotary compressor 1 which concerns on 2nd Embodiment of this invention is demonstrated with reference to FIGS. FIG. 7 is a diagram for explaining the procedure of the method for manufacturing the rotary compressor according to the second embodiment of the present invention. FIG. 8 is a diagram for explaining the first brazing process in FIG. 7, and FIG. 9 is a diagram for explaining the welding process in FIG. The second embodiment is different from the first embodiment in which the first brazing process is performed after the welding process in that the first brazing process is performed before the welding process. In addition, in 2nd Embodiment, since it is the same as that of 1st Embodiment except the order of a 1st brazing process and a welding process, the same number as 1st Embodiment is attached | subjected and the description is abbreviate | omitted.

  In the manufacturing method of the rotary compressor 1, as shown in FIG. 7, first, the shape of the hermetic casing 10 is adjusted in the tube expansion step (S11). Thereafter, a hole 10a for attaching the reinforcing member 9 is formed in the hermetic casing 10 in the drilling step (S12). Next, in the first brazing step (S13), the joint pipes 5 and 8 are fixed to the reinforcing member 9 by brazing materials R3 and R6, respectively. In this first brazing step (S13), as shown in FIG. 8 (a), the joint pipes 5 and 8 are moved from the outside of the reinforcing member 9 (on the right side in FIG. 8 (a)) to the two recessed portions. It arrange | positions so that it may mutually fit. The joint pipes 5 and 8 are fixed to the reinforcing member 9 by brazing materials R3 and R6, respectively, as shown in FIG. 8B.

  Next, in the welding step (S14), the reinforcing member 9 is fixed to the sealed casing 10 by projection welding. In this welding step (S14), as shown in FIG. 9A, the reinforcing member 9 is disposed so as to fit into the hole 10a from the inner side of the sealed casing 10 (left side in FIG. 9A). Then, the side surface of the reinforcing member 9 and the inner peripheral surface of the hole 10a of the sealed casing 10 are joined by projection welding, so that the reinforcing member 9 is attached to the sealed casing 10 as shown in FIG. Fixed.

  Next, in the second brazing step (S 15), after the parts such as the front cylinder 33, the rear cylinder 36, and the motor 21 are assembled in the hermetic casing 10, the pipe 3 is brazed to the inlet tube 4. In addition to being connected by R1, the inlet tube 4 is fixed to the joint pipe 5 by the brazing material R1, the pipe 6 is connected to the inlet tube 7 by the brazing material R4, and the inlet tube 7 is connected to the joint pipe 8 by the brazing material. Fixed by R4. In the second brazing step (S15), one end of each of the inlet tubes 4 and 7 is press-fitted into the suction holes 33a and 36a of the front cylinder 33 and the rear cylinder 36, and the pipes 3 and 6 are connected to the inlet tubes 4 and 7 respectively. Then, the pipes 3 and 6, the inlet tubes 4 and 7, and the joint pipes 5 and 8 are respectively fixed by brazing. The rotary compressor 1 is completed through the above steps (S16).

[Features of Manufacturing Method of Rotary Compressor 1 of Second Embodiment]
The manufacturing method of the rotary compressor 1 of the second embodiment has the following characteristics.

  In the manufacturing method of the rotary compressor 1 of this embodiment, the same effect as 1st Embodiment is acquired. Further, the joint pipes 5 and 8 are fixed to the reinforcing member 9 before being fixed to the hermetic casing 10 by brazing. Therefore, compared to the case where the joint pipes 5 and 8 are fixed to the reinforcing member 9 after being fixed to the hermetic casing 10 by brazing, the heat capacity required for the brazing operation is reduced, Work efficiency is improved.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not only by the above description of the embodiments but also by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, the method for manufacturing a compressor applied to the rotary compressor 1 has been described.

  Further, in the above-described embodiment, the example applied to the two-cylinder type compressor including the front cylinder 33 and the rear cylinder 36 has been described. However, the present invention is not limited to this and can be applied to a one-cylinder type compressor. is there.

  By using the present invention, it is possible to provide a compressor that is simplified in the manufacturing process of the compressor and connected to the hermetic casing without distortion by piping.

It is a schematic block diagram of the rotary compressor which concerns on 1st Embodiment of this invention. It is an enlarged view of the part enclosed with the dashed-dotted line of the rotary compressor of FIG. It is a figure explaining the procedure of the manufacturing method of the rotary compressor of FIG. It is a figure explaining the welding process of FIG. It is a figure explaining the 1st brazing process of FIG. It is a figure explaining the 2nd brazing process of FIG. It is a figure explaining the procedure of the manufacturing method of the rotary compressor which concerns on 2nd Embodiment of this invention. It is a figure explaining the 1st brazing process of FIG. It is a figure explaining the welding process of FIG. It is a figure explaining the procedure of the manufacturing method of the conventional rotary compressor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotary compressor 3, 6 Piping 4, 7 Inlet tube 5, 8 Joint pipe 9 Reinforcing member 10 Sealed casing 33, 36 Cylinder 33a, 36a Suction hole B1, B2 Cylinder chamber

Claims (3)

Cylinders (33, 36) having suction holes (33a, 36a) communicating with the cylinder chambers (B1, B2), a sealed casing (10) for accommodating the cylinders (33, 36) therein, and the sealed casing ( 10) joint pipes (5, 8) for holding inlet tubes (4, 7) connected to pipes (3, 6) for supplying refrigerant to the cylinder chambers (B1, B2) from the outside, A method for producing a compressor (1) comprising a reinforcing member (9) for fixing joint pipes (5, 8) to the closed casing (10),
A welding step of fixing the reinforcing member (9) to the sealed casing (10) by projection welding;
A first brazing step of fixing the joint pipe (5, 8) to the reinforcing member (9) by brazing;
A second end in which one end of the inlet tube (4, 7) is disposed in the suction hole (33a, 36a) of the cylinder (33, 36) and the other end is fixed to the joint pipe (5, 8) by brazing. A method for manufacturing a compressor, comprising: a brazing process.   The method for manufacturing a compressor according to claim 1, wherein the first brazing step is performed before the welding step. Cylinders (33, 36) having suction holes (33a, 36a) communicating with the cylinder chambers (B1, B2), a sealed casing (10) for accommodating the cylinders (33, 36) therein, and the sealed casing ( 10) joint pipes (5, 8) for holding inlet tubes (4, 7) connected to pipes (3, 6) for supplying refrigerant to the cylinder chambers (B1, B2) from the outside, A compressor (1) comprising a reinforcing member (9) for fixing joint pipes (5, 8) to the closed casing (10),
The reinforcing member (9) is fixed to the hermetic casing (10) by projection welding,
The joint pipe (5, 8) is fixed to the reinforcing member (9) by brazing,
One end of the inlet tube (4, 7) is disposed in the suction hole (33a, 36a) of the cylinder (33, 36) and the other end is fixed to the joint pipe (5, 8) by brazing. A compressor characterized by that.

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