JP2022167023A - compressor - Google Patents

Abstract

To provide a compressor which enables improvement of assemblability.SOLUTION: A compressor includes: a cylindrical housing extending in an axial direction and having an opening on a side surface; a suction pipe which suctions a refrigerant into the housing; and a discharge pipe which discharges the refrigerant compressed by a scroll compression part in the housing to the outside of the housing. The discharge pipe includes a discharge pipe body which penetrates through the opening, extends from the inside of the housing to the outside of the housing in a radial direction of the housing, and has a straight pipe shape. An inner peripheral surface of the opening and an opening facing part, which faces the inner peripheral surface, of an outer peripheral surface of the discharge pipe body are spaced apart from each other.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to compressors.

For example, Patent Document 1 discloses a fixed scroll fixed in a cylindrical housing, an orbiting scroll that revolves around the fixed scroll in the housing, and a compression chamber formed between the fixed scroll and the orbiting scroll. and a discharge pipe for discharging the refrigerant compressed in the above to the outside of the housing. In this compressor, a dome-shaped discharge cover is provided in the housing so as to cover the compressor. The discharge pipe extends in a direction perpendicular to the axis of the housing, and is provided to pass through the top cover and discharge cover of the housing.

Japanese Patent No. 5285455

However, in the compressor disclosed in Patent Document 1, during assembly, the discharge pipe must pass through the hole formed in the top cover of the housing and the tubular portion provided in the discharge cover. For this reason, when the top cover is attached, it is difficult to insert (press fit) the discharge pipe unless the hole in the top cover and the cylindrical portion of the discharge cover are positioned coaxially with high accuracy. may become.

The present disclosure has been made to solve the above problems, and an object of the present disclosure is to provide a compressor capable of improving the ease of assembly.

In order to solve the above problems, a compressor according to the present disclosure includes a cylindrical housing extending in an axial direction and having an opening on a side surface, a suction pipe for sucking refrigerant into the housing, a scroll compressor in the housing, a discharge pipe for discharging the refrigerant compressed at the portion to the outside of the housing, the discharge pipe passing through the opening and extending in a radial direction of the housing from the inside of the housing toward the outside of the housing. A tubular discharge pipe main body is provided, and the inner peripheral surface of the opening is separated from the opening facing portion of the outer peripheral surface of the discharge pipe main body that faces the inner peripheral surface.

According to the compressor of the present disclosure, assemblability can be improved. In addition, the discharge pipe, which is exposed to high temperature and high pressure, has no residual stress associated with bending or other processing, which is advantageous in terms of pressure resistance.

1 is a cross-sectional view of a compressor according to an embodiment of the present disclosure; FIG. 3 is an enlarged cross-sectional view showing the configuration of a discharge pipe of the compressor according to the embodiment of the present disclosure; FIG.

<Embodiment>
(compressor configuration)
A compressor according to an embodiment of the present disclosure will be described below with reference to FIGS. 1 and 2. FIG.
As shown in FIG. 1 , the compressor 10 compresses the refrigerant sucked into the housing 11 through the suction pipe 18 and discharges it out of the housing 11 through the discharge pipe 50 .
The compressor 10 has a scroll compression section 30 inside the housing 11 .
The compressor 10 may include a scroll compression section 30 and a rotary compression section 20 within the housing 11 .
In this embodiment, the compressor 10 is a hermetic two-stage compressor including a scroll compression section 30 and a rotary compression section 20 .
The compressor 10 compresses, for example, carbon dioxide (CO ₂ ) as a refrigerant.
The compressor 10 may compress refrigerants other than carbon dioxide.

The compressor 10 includes a housing 11 , a rotary shaft 15 , a rotary compression section 20 , a scroll compression section 30 , an electric motor 40 , a suction pipe 18 and a discharge pipe 50 .

(Housing configuration)
A housing 11 forms the outer shell of the compressor 10 .
The housing 11 extends in the axial direction Da.
The housing 11 may be provided with the axial direction Da along the vertical direction.
The housing 11 may be formed in a cylindrical shape as a whole.
The housing 11 includes a housing body 12, a top cover 13, and a bottom cover 14.
The housing 11 defines an internal space 11S extending in the axial direction Da.

The housing body 12 is formed in a cylindrical shape extending in the axial direction Da.
A suction pipe connection opening 12 h is formed in the lower portion of the housing body 12 . A suction pipe 18 is connected to the suction pipe connection opening 12h.
The suction pipe 18 draws refrigerant into the housing 11 .
The suction pipe 18 sucks refrigerant from outside the housing 11 .
Refrigerant sucked into the housing 11 from the suction pipe 18 is compressed in two stages by the rotary compression section 20 and the scroll compression section 30 .

The top cover 13 is provided on top of the housing body 12 .
The top cover 13 closes the opening on one side of the housing body 12 in the axial direction Da.
For example, the top cover 13 integrally has a cylindrical portion 13a and a curved portion 13b.
The tubular portion 13a is formed in a cylindrical shape extending in the axial direction Da.
A lower end of the tubular portion 13 a is joined to an upper end of the housing body 12 .
The curved portion 13b is provided continuously with the upper end of the cylindrical portion 13a.
The curved portion 13b is curved to be convex upward.
The curved portion 13b closes the upper portion of the tubular portion 13a.

The top cover 13 has an opening 19 .
The opening 19 is formed, for example, in the cylindrical portion 13a.
The opening 19 penetrates the cylindrical portion 13a in the radial direction Dr. That is, the housing 11 has an opening 19 on its side.

The bottom cover 14 is provided below the housing body 12 .
The bottom cover 14 closes the opening on the other side of the housing body 12 in the axial direction Da.
A base member 16 is provided below the bottom cover 14 .
The base member 16 extends outward in a radial direction Dr intersecting the axial direction Da in the housing 11 .
When the compressor 10 is installed on a predetermined mounting target, the base member 16 is fixed to the predetermined mounting target.

(Structure of rotating shaft)
The rotating shaft 15 is accommodated within the housing 11 .
The rotating shaft 15 extends in the axial direction Da within the housing 11 .
The rotating shaft 15 is supported by a bearing 17A and a bearing 17B so as to be rotatable about an axis along the axial direction Da.
The bearings 17A and 17B are spaced apart from each other in the axial direction Da.
The bearing 17A is provided on one side (upper side) of the rotating shaft 15 in the axial direction Da.
The bearing 17A is fixed to the inner surface of the housing body 12. As shown in FIG.
The bearing 17B is provided on the other side (lower side) of the rotating shaft 15 in the axial direction Da.
The bearing 17B is bolted to the cylinder 23 that constitutes the rotary compression section 20 .

(Structure of Rotary Compressor)
The rotary compression part 20 is provided at the bottom inside the housing 11 .
The rotary compression section 20 is arranged below the electric motor 40 .
The rotary compression section 20 has a piston rotor 22 and a cylinder 23 .

The piston rotor 22 is provided at the other end of the rotating shaft 15 on the other side in the axial direction Da.
The piston rotor 22 is provided eccentrically with respect to the central axis of the rotating shaft 15 in the radial direction Dr.
The piston rotor 22 rotates eccentrically with respect to the central axis of the rotating shaft 15 as the rotating shaft 15 rotates.
Cylinder 23 accommodates piston rotor 22 therein.
The piston rotor 22 rotates eccentrically within the cylinder 23 .

The rotary compression section 20 introduces into the cylinder 23 the refrigerant sucked from the suction pipe 18 which will be described later.
The rotary compression section 20 compresses the refrigerant by rotating the piston rotor 22 within the cylinder 23 .
The rotary compressor 20 discharges the compressed refrigerant into the internal space 11S of the housing 11 having an intermediate pressure through a discharge hole (not shown).

(Structure of scroll compression section)
The scroll compression part 30 is provided in the upper part inside the housing 11 .
The scroll compression section 30 is arranged above the electric motor 40 .
The scroll compression section 30 has a fixed scroll 31 and an orbiting scroll 32 .

The fixed scroll 31 is fixed to the upper surface of the bearing 17A.
The fixed scroll 31 has a spiral fixed wrap 31r protruding downward.

The orbiting scroll 32 is arranged below the fixed scroll 31 so as to face the fixed scroll 31 .
The orbiting scroll 32 is provided eccentrically in the radial direction Dr at one end (upper end) of the rotating shaft 15 in the axial direction Da. As a result, the orbiting scroll 32 rotates eccentrically as the rotating shaft 15 rotates.
The orbiting scroll 32 revolves around the fixed scroll 31 .

The orbiting scroll 32 has an orbiting wrap 32r protruding upward.
The orbiting wrap 32r of the orbiting scroll 32 meshes with the fixed wrap 31r of the fixed scroll 31. As shown in FIG.
A compression chamber 34 is formed between the orbiting wrap 32 r of the orbiting scroll 32 and the fixed wrap 31 r of the fixed scroll 31 .

The scroll compression portion 30 sucks refrigerant into the compression chamber 34 from the internal space 11S through a suction hole (not shown). The refrigerant sucked into the compression chamber 34 is compressed by the orbiting scroll 32 that revolves around the fixed scroll 31 . The compressed refrigerant is discharged to the upper side of fixed scroll 31 through discharge holes 35 formed in fixed scroll 31 .

A discharge cover 39 is provided above the fixed scroll 31 .
The discharge cover 39 is housed in the upper part inside the housing 11 .
The discharge cover 39 is arranged between the top cover 13 and the scroll compression section 30 .
The discharge cover 39 is fixed to the fixed scroll 31 with bolts or the like.

A discharge space 39S is formed between the discharge cover 39 and the fixed scroll 31 .
The ejection space 39S is a space separated from the internal space 11S and does not communicate with the internal space 11S.
The high-pressure refrigerant compressed by the scroll compression portion 30 is discharged from the discharge hole 35 into the discharge space 39S. That is, the discharge space 39S forms a high pressure area H. As shown in FIG.

(Configuration of electric motor)
The electric motor 40 is arranged in the middle portion in the vertical direction inside the housing 11 .
The electric motor 40 has a rotor 41 and a stator 42 .
The rotor 41 is fixed to the outer surface of the rotating shaft 15 .
The rotor 41 is arranged between the bearings 17A and 17B in the axial direction Da.

The stator 42 is arranged outside the rotor 41 in the radial direction Dr so as to surround the outer surface of the rotor 41 .
The stator 42 is fixed to the inner surface of the housing body 12 of the housing 11 .
The stator 42 is connected to a power supply via wiring (not shown).
The electric motor 40 rotates the rotating shaft 15 with electric power from the power supply.

(Structure of discharge pipe)
The discharge pipe 50 discharges the refrigerant compressed by the scroll compression portion 30 inside the housing 11 to the outside of the housing 11 .
In this embodiment, the discharge pipe 50 discharges the high-pressure refrigerant compressed in two stages by the rotary compression section 20 and the scroll compression section 30 to the outside of the housing 11 .
The discharge pipe 50 is arranged above the housing 11 .
The discharge pipe 50 penetrates through the top cover 13 and the discharge cover 39 .
One end of the discharge pipe 50 communicates with the discharge space 39S.
The other end of the discharge pipe 50 opens toward the outside of the housing 11 .

As shown in FIG. 2 , the discharge pipe 50 includes a discharge pipe main body 51 and an outer pipe 52 .
The discharge pipe main body 51 has a straight tubular shape extending through the opening 19 and extending in the radial direction Dr of the housing 11 from the inside of the housing 11 toward the outside of the housing 11 .
A base end portion 51 b of the discharge pipe main body 51 is fixed to a through hole 39 h formed in the discharge cover 39 .
For example, the base end portion 51b of the discharge pipe main body 51 may be press-fitted into the through hole 39h, for example.
For example, the base end portion 51b of the discharge pipe main body 51 may be joined to the through hole 39h by brazing or welding.
A distal end portion 51 s of the discharge pipe main body 51 protrudes outward in the radial direction Dr from the outer surface of the housing 11 .

The outer diameter of the outer peripheral surface 51g of the discharge pipe main body 51 is smaller than the inner diameter of the opening 19 by a predetermined dimension.
Of the outer peripheral surface 51g of the discharge pipe main body 51, an opening facing portion 51d facing the inner peripheral surface 19f of the opening 19 and the inner peripheral surface 19f of the opening 19 are separated.
The opening facing portion 51d of the discharge pipe main body 51 and the inner peripheral surface 19f of the opening 19 are separated from each other by a predetermined distance in the pipe radial direction of the discharge pipe main body 51 .

One end 52 a of the outer tube 52 is fixed to the opening 19 .
For example, one end 52 a of the outer tube 52 may be press-fitted into the opening 19 .
For example, one end 52a of the outer tube 52 may be joined to the opening 19 by brazing, welding, or the like.
The outer tube 52 has a straight tubular shape extending outward in the radial direction Dr from the housing 11 .
The outer diameter of the discharge pipe main body 51 is smaller than the inner diameter of the outer pipe 52 .
A discharge pipe main body 51 is inserted inside the outer pipe 52 .
The distal end portion 51s of the discharge pipe main body 51 is arranged at the same position in the radial direction Dr of the housing 11 as the distal end 52s of the outer tube 52, or is arranged radially inside the housing 11 from the distal end 52s. That is, the distal end portion 51 s of the discharge pipe main body 51 does not protrude outward in the radial direction Dr of the housing 11 with respect to the distal end 52 s of the outer pipe 52 .

The outer tube 52 and the discharge tube main body 51 may be joined by brazing, for example.
As a result, the brazing material W is interposed between the inner surface of the outer tube 52 and the outer peripheral surface 51g of the discharge tube body 51 .
The brazing filler metal W is provided continuously from at least the distal end portion 51s of the discharge pipe main body 51 to the opening facing portion 51d.

Thus, the discharge pipe main body 51 is fixed to the through hole 39h of the discharge cover 39 at the base end 51b and to the opening 19 via the outer pipe 52 at the front end 51s.
An intermediate portion of the discharge pipe main body 51 is exposed in a space 11m between the housing 11 and the discharge cover 39 .

For example, the connecting pipe member 53 may be connected to the inner side of the distal end portion 51s of the discharge pipe main body 51 .
For example, the connection pipe member 53 may be inserted inside the distal end portion 51 s of the discharge pipe main body 51 .
For example, the connecting pipe member 53 may be press-fitted into the distal end portion 51 s of the discharge pipe body 51 .
For example, the connection pipe member 53 may be joined to the tip portion 51s of the discharge pipe body 51 by brazing or welding.
The connecting pipe member 53 is connected to an external pipe to the compressor 10 .
A portion of the connection pipe member 53 protrudes further outward in the radial direction Dr of the housing 11 than the distal end portion 51 s of the discharge pipe main body 51 .
The connection pipe member 53 has an enlarged diameter portion 53d at a portion that protrudes outward in the radial direction Dr of the housing 11 from the distal end portion 51s of the discharge pipe main body 51 .
An external pipe can be connected to the expanded diameter portion 53d.
The connection pipe member 53 is thicker than the discharge pipe main body 51 .

When the compressor 10 is assembled, for example, the discharge pipe 50 as described above is first installed by an operator through the opening 19 into the through hole 39 h of the discharge cover 39 . At this time, the outer tube 52 is not attached to the opening 19 . The inner diameter of the opening 19 is larger than the outer diameter of the discharge pipe main body 51 . Therefore, the inner peripheral surface 19f of the opening 19 and the opening facing portion 51d of the outer peripheral surface 51g of the discharge pipe main body 51 facing the inner peripheral surface 19f of the opening 19 are separated from each other in the pipe radial direction of the discharge pipe main body 51. . Therefore, the operator can easily attach the discharge pipe main body 51 to the through hole 39 h of the discharge cover 39 through the opening 19 .
After that, the operator attaches the outer tube 52 to the opening 19 .
Further, the operator joins the outer pipe 52 and the discharge pipe main body 51 by brazing.
For example, the operator may then connect the connecting pipe member 53 to the distal end portion 51 s of the discharge pipe main body 51 .

(Action and effect)
According to the compressor 10 of this embodiment, the discharge pipe 50 passes through the opening 19 provided on the side surface of the housing 11 . The inner peripheral surface 19f of the opening 19 and the opening facing portion 51d of the discharge pipe main body 51 are separated from each other. In such a configuration, the discharge pipe 50 can be easily inserted into the opening 19 by fixing the discharge pipe 50 to the opening 19 after passing the discharge pipe 50 through the opening 19 . Therefore, the assemblability of the compressor 10 can be improved. In addition, even when compared with the structure in which the discharge pipe is axially inserted from the upper surface of the housing 11 and then bent in the radial direction, the discharge pipe exposed to high temperature and high pressure has residual stress associated with bending and other processing. It does not occur and is advantageous in terms of withstand voltage.

Further, according to one example of the present embodiment, the outer diameter of the outer peripheral surface 51g is smaller than the inner diameter of the inner peripheral surface 19f. As a result, the inner peripheral surface 19f of the opening 19 and the opening facing portion 51d of the outer peripheral surface 51g of the discharge pipe main body 51 facing the inner peripheral surface 19f of the opening 19 are separated, and the gap between the opening 19 and the discharge pipe main body 51 is separated. A gap can be formed in the

Further, according to one example of the present embodiment, the discharge pipe 50 further includes an outer pipe 52 whose one end is fixed to the opening 19 and extends radially outside of the housing 11 in the direction Dr.
According to such a configuration, the discharge pipe main body 51 is inserted inside the outer pipe 52 . Outside the outer peripheral surface 51 g of the housing 11 in the radial direction Dr, the discharge pipe 50 has a double structure in which an outer pipe 52 is provided outside the discharge pipe main body 51 . As a result, the thickness of the discharge pipe 50 including the discharge pipe main body 51 and the outer pipe 52 can be increased, and the pressure resistance of the discharge pipe 50 outside the housing 11 in the radial direction Dr can be increased.
Also, one end of the outer tube 52 is fixed, and the discharge tube main body 51 is positioned inside it. As a result, part of the gap between the inner peripheral surface 19f of the opening 19 and the opening facing portion 51d of the outer peripheral surface 51g of the discharge pipe main body 51 facing the inner peripheral surface 19f of the opening 19 is formed into a rigid outer surface. It can be formed (filled) with tube 52 . As a result, the discharge pipe main body 51 can be made more rigid with respect to the opening 19 than a structure in which the gap between the inner peripheral surface 19f of the opening 19 and the opening facing portion 51d of the discharge pipe main body 51 is filled with, for example, a sealing material. can be fixed. As a result, concentration of stress on the discharge pipe main body 51 can be suppressed.
Further, by providing the outer pipe 52, the gap between the inner peripheral surface 19f of the opening 19 and the opening facing portion 51d of the discharge pipe main body 51 can be made larger. Thereby, the inner diameter of the opening 19 can be made larger than the outer diameter of the discharge pipe main body 51 . Therefore, the operator can more easily insert the discharge pipe main body 51 into the opening 19 when assembling the compressor 10 .
In addition, by joining the outer tube 52 and the discharge pipe main body 51 at the portion where the discharge pipe main body 51 is inserted inside the outer pipe 52, the joint region between the outer pipe 52 and the discharge pipe main body 51 can be discharged. A long length can be secured in the extension direction of the pipe body 51 . Therefore, the discharge pipe main body 51 is firmly joined to the housing 11 via the outer pipe 52 .

Further, according to one example of this embodiment, the compressor 10 has a brazing material W interposed between the outer pipe 52 and the discharge pipe main body 51 .
As a result, the outer tube 52 and the discharge tube main body 51 can be firmly joined.
In addition, by closing the gap between the outer tube 52 and the discharge pipe main body 51 with the brazing filler metal W, the sealing performance and pressure resistance of the gap between the outer pipe 52 and the discharge pipe main body 51 can be improved compared to the structure where the gap between the outer pipe 52 and the discharge pipe main body 51 is closed with a sealing material or the like. can increase

Further, according to one example of the present embodiment, the brazing material W is provided at least from the distal end portion 51s of the discharge pipe main body 51 to the opening facing portion 51d of the discharge pipe main body 51 .
As a result, it is possible to secure a long joining region along the extending direction of the discharge pipe main body 51 where the outer pipe 52 and the discharge pipe main body 51 are joined by brazing. Therefore, the discharge pipe main body 51 is firmly fixed.

Further, according to one example of the present embodiment, the distal end portion 51s of the discharge pipe main body 51 is arranged at the same position in the radial direction Dr of the housing 11 or inside the radial direction Dr of the housing 11 with respect to the distal end portion 52s of the outer pipe 52. ing.
As a result, the tip portion 51 s of the discharge pipe main body 51 does not protrude from the tip 52 s of the outer tube 52 to the outside in the radial direction Dr of the housing 11 . As a result, the discharge pipe main body 51 has a double structure in which the outer pipe 52 is provided outside the discharge pipe main body 51 at a portion radially outside the housing 11 in the Dr direction, thereby ensuring high pressure resistance. can.

Further, according to one example of this embodiment, the intermediate portion of the discharge pipe main body 51 is exposed in the space 11m between the housing 11 and the discharge cover 39 .
Inside the housing 11 , a discharge space 39</b>S facing the scroll compression portion 30 inside the discharge cover 39 becomes a high-pressure region H having a higher pressure than the atmosphere outside the housing 11 . In the housing 11, a space 11m between the housing 11 and the discharge cover 39 is an intermediate pressure region having a higher pressure than the atmosphere outside the housing 11 and a lower pressure than the discharge space 39S inside the discharge cover 39. Become M. That is, the intermediate portion of the discharge pipe main body 51 is exposed to the intermediate pressure region M between the inner surface of the housing 11 and the outer peripheral surface of the discharge cover 39 . Therefore, it is not necessary to expose the discharge pipe main body 51 to the high pressure region H, and the wall thickness thereof can be reduced.

Further, according to one example of the present embodiment, the compressor 10 is connected to the discharge pipe main body 51 on the side of the distal end portion 51 s of the connection pipe member 53 that is thicker than the discharge pipe main body 51 .
In this manner, an external pipe can be connected to the connecting pipe member 53 connected to the distal end portion 51s of the discharge pipe main body 51 . A high-pressure refrigerant discharged from the housing 11 flows through the connecting pipe member 53 . For this reason, the connecting pipe member 53 is a portion that protrudes outward in the radial direction Dr of the housing 11 from the distal end portion 51s of the discharge pipe main body 51, and connects the inside of the connecting pipe member 53 through which the high-pressure refrigerant flows and the portion exposed to the atmosphere. The differential pressure with the outside of the pipe member 53 increases. By making the wall thickness of the connection pipe member 53 larger than that of the discharge pipe main body 51, the pressure resistance of the connection pipe member 53 can be ensured.

Further, according to one example of the present embodiment, the compressor 10 compresses the refrigerant in two stages with the rotary compression section 20 and the scroll compression section 30 .
Thereby, the compressor 10 constitutes a two-stage compressor. The pressure of the refrigerant discharged from the compressor 10 having such a configuration is high. For this reason, the efficiency of the compressor 10 is enhanced by providing the discharge pipe 50 having high pressure resistance while improving the ease of assembly with the configuration as described above.

Further, according to one example of this embodiment, the refrigerant is carbon dioxide.
Thus, when the refrigerant to be compressed is carbon dioxide, the compressor 10 is required to have high pressure resistance. In contrast, the compressor 10 having the configuration described above is particularly suitable.

<Appendix>
For example, the compressor 10 described in the embodiment is understood as follows.

(1) The compressor 10 according to the first aspect includes a cylindrical housing 11 extending in the axial direction Da and having an opening 19 on the side surface, a suction pipe 18 for sucking refrigerant into the housing 11, and the housing 11. a discharge pipe 50 for discharging the refrigerant compressed by the inner scroll compression portion 30 to the outside of the housing 11 , the discharge pipe 50 passing through the opening 19 from inside the housing 11 to outside the housing 11 . A straight pipe-shaped discharge pipe main body 51 extending in the radial direction Dr of the housing 11 is provided, facing the inner peripheral surface 19f of the inner peripheral surface 19f of the opening 19 and the outer peripheral surface 51g of the discharge pipe main body 51. and the opening facing portion 51d are separated from each other.

In this compressor 10 , the discharge pipe 50 passes through an opening 19 provided on the side surface of the housing 11 . The inner peripheral surface 19f of the opening 19 and the opening facing portion 51d of the outer peripheral surface 51g of the discharge pipe main body 51 facing the inner peripheral surface 19f of the opening 19 are separated from each other. In such a configuration, the discharge pipe 50 can be easily inserted into the opening 19 by fixing the discharge pipe 50 to the opening 19 after passing the discharge pipe 50 through the opening 19 . Therefore, the assemblability of the compressor 10 can be improved.

(2) A compressor 10 according to a second aspect is the compressor 10 of (1), in which the outer diameter of the outer peripheral surface 51g is smaller than the inner diameter of the inner peripheral surface 19f.

By making the outer diameter of the outer peripheral surface 51g of the discharge pipe main body 51 smaller than the inner diameter of the inner peripheral surface 19f of the opening 19 in this way, the inner peripheral surface 19f of the opening 19 and the outer peripheral surface 51g of the discharge pipe main body 51 Of these, the opening facing portion 51d facing the inner peripheral surface 19f of the opening 19 can be separated.

(3) A compressor 10 according to a third aspect is the compressor 10 of (1) or (2), wherein the discharge pipe 50 is
An outer tube 52 having one end fixed to the opening 19 and extending outward in the radial direction Dr of the housing 11 and having the discharge tube main body 51 inserted therein is further provided.

According to such a configuration, the discharge pipe main body 51 is inserted inside the outer pipe 52 . Outside the outer peripheral surface 51 g of the housing 11 in the radial direction Dr, a double structure is formed in which the outer pipe 52 is provided outside the discharge pipe main body 51 . As a result, the thickness of the discharge pipe 50 including the discharge pipe main body 51 and the outer pipe 52 can be increased, and the pressure resistance of the discharge pipe 50 outside the housing 11 in the radial direction Dr can be increased.
One end of the outer pipe 52 is fixed, and the discharge pipe main body 51 is positioned inside thereof. A part of the gap between the opening facing portion 51d facing the surface 19f can be formed (filled) with the outer tube 52 made of a rigid body. As a result, compared to a structure in which the gap between the inner peripheral surface 19f of the opening 19 and the opening facing portion 51d of the outer peripheral surface 51g of the discharge pipe main body 51 facing the inner peripheral surface 19f of the opening 19 is filled with, for example, a sealing material. , the discharge pipe main body 51 can be more firmly fixed to the opening 19 . As a result, concentration of stress on the discharge pipe main body 51 can be suppressed.
Further, by providing the outer pipe 52, the gap between the inner peripheral surface 19f of the opening 19 and the opening facing portion 51d of the outer peripheral surface 51g of the discharge pipe main body 51 facing the inner peripheral surface 19f of the opening 19 can be made larger. can do. Thereby, the inner diameter of the opening 19 can be made larger than the outer diameter of the discharge pipe main body 51 . Therefore, it becomes easier to insert the discharge pipe main body 51 into the opening 19 when assembling the compressor 10 .
In addition, by joining the outer tube 52 and the discharge pipe main body 51 at the portion where the discharge pipe main body 51 is inserted inside the outer pipe 52, the joint region between the outer pipe 52 and the discharge pipe main body 51 can be discharged. A long length can be secured in the extension direction of the pipe body 51 . Therefore, the discharge pipe main body 51 is firmly joined to the housing 11 via the outer pipe 52 .

(4) A compressor 10 according to a fourth aspect is the compressor 10 of (3), in which the outer diameter of the discharge pipe main body 51 is smaller than the inner diameter of the outer pipe 52, and the inner diameter of the outer pipe 52 is A brazing material W is interposed between the peripheral surface 19f and the outer peripheral surface 51g of the discharge pipe main body 51. As shown in FIG.

Thus, by interposing the brazing material W between the inner peripheral surface of the outer tube 52 and the outer peripheral surface 51g of the discharge pipe body 51, the outer tube 52 and the discharge pipe body 51 can be firmly joined. can be done.
In addition, by closing the gap between the outer tube 52 and the discharge pipe main body 51 with the brazing filler metal W, the sealing performance and pressure resistance of the gap between the outer pipe 52 and the discharge pipe main body 51 can be improved compared to the structure where the gap between the outer pipe 52 and the discharge pipe main body 51 is closed with a sealing material or the like. can increase

(5) The compressor 10 according to the fifth aspect is the compressor 10 of (4), in which the brazing material W extends from at least the tip portion 51s of the discharge pipe main body 51 to the outer periphery of the discharge pipe main body 51. It is provided up to an opening facing portion 51d where the surface 51g and the inner peripheral surface 19f of the opening 19 face each other.

As a result, it is possible to secure a long joining region along the extending direction of the discharge pipe main body 51 where the outer pipe 52 and the discharge pipe main body 51 are joined by brazing. Therefore, the discharge pipe main body 51 is firmly fixed.

(6) A compressor 10 according to a sixth aspect is the compressor 10 according to any one of (3) to (5), in which the distal end portion 51s of the discharge pipe main body 51 is the distal end portion of the outer pipe 52. 52 s in the same position in the radial direction Dr of the housing 11 or on the inner side in the radial direction Dr of the housing 11 .

As a result, the tip portion 51 s of the discharge pipe main body 51 does not protrude from the tip 52 s of the outer tube 52 to the outside in the radial direction Dr of the housing 11 . As a result, the discharge pipe main body 51 has a double structure in which the outer pipe 52 is provided outside the discharge pipe main body 51 at a portion radially outside the housing 11 in the Dr direction, thereby ensuring high pressure resistance. can.

(7) A compressor 10 according to a seventh aspect is the compressor 10 according to any one of (1) to (6), wherein the base end portion 51b of the discharge pipe main body 51 is located inside the housing 11. It is fixed to a through hole 39h formed in a discharge cover 39 that covers the provided scroll compression portion 30, and an intermediate portion of the discharge pipe main body 51 is exposed to a space 11m between the housing 11 and the discharge cover 39. is doing.

As a result, the portion of the housing 11 facing the scroll compression portion 30 inside the discharge cover 39 becomes a high pressure region H compared to the atmosphere outside the housing 11 . In the housing 11 , a space 11 m between the housing 11 and the discharge cover 39 serves as an intermediate pressure region M having a higher pressure than the atmosphere outside the housing 11 and a lower pressure than the inside of the discharge cover 39 . That is, the intermediate portion of the discharge pipe main body 51 is exposed to the intermediate pressure region M between the inner surface of the housing 11 and the outer peripheral surface of the discharge cover 39 . Therefore, it is not necessary to expose the discharge pipe main body 51 to the high pressure region H, and the wall thickness thereof can be reduced.

(8) A compressor 10 according to an eighth aspect is the compressor 10 according to any one of (1) to (7), wherein an external pipe is provided inside the tip portion 51s of the discharge pipe main body 51. The connecting pipe member 53 to be connected is connected,
The connection pipe member 53 is thicker than the discharge pipe main body 51 .

In this manner, an external pipe can be connected to the connecting pipe member 53 connected to the distal end portion 51s of the discharge pipe main body 51 . A high-pressure refrigerant discharged from the housing 11 flows through the connecting pipe member 53 . For this reason, the connecting pipe member 53 is a portion that protrudes outward in the radial direction Dr of the housing 11 from the distal end portion 51s of the discharge pipe main body 51, and connects the inside of the connecting pipe member 53 through which the high-pressure refrigerant flows and the portion exposed to the atmosphere. The differential pressure with the outside of the pipe member 53 increases. By making the wall thickness of the connection pipe member 53 larger than that of the discharge pipe main body 51, the pressure resistance of the connection pipe member 53 can be ensured.

(9) A compressor 10 according to a ninth aspect is the compressor 10 according to any one of (1) to (8), in which the orbiting scroll 32 of the scroll compression section 30 is provided at one end, and the housing 11, a rotating shaft 15 extending in the axial direction Da, and a rotary compression portion 20 having a piston rotor 22 provided at the other end of the rotating shaft 15. The sucked refrigerant is compressed in two stages by the rotary compression section 20 and the scroll compression section 30 .

Thus, the compressor 10 constitutes a two-stage compressor in which the rotary compression section 20 and the scroll compression section 30 compress the refrigerant in two stages. The pressure of the refrigerant discharged from the compressor 10 having such a configuration is high. For this reason, the efficiency of the compressor 10 is enhanced by providing the discharge pipe 50 having high pressure resistance while improving the ease of assembly with the configuration as described above.

(10) A compressor 10 according to a tenth aspect is the compressor 10 according to any one of (1) to (9), wherein the refrigerant is carbon dioxide.

Thus, when the refrigerant to be compressed is carbon dioxide, the compressor 10 is required to have high pressure resistance. In contrast, the compressor 10 having the configuration described above is particularly suitable.

DESCRIPTION OF SYMBOLS 10... Compressor 11... Housing 11S... Internal space 11m... Space 12... Housing main body 12h... Suction pipe connection opening 13... Top cover 13a... Cylindrical part 13b... Curved part 14... Bottom cover 15... Rotating shaft 16... Base member 17A , 17B... Bearing 18... Intake pipe 19... Opening 19f... Inner peripheral surface 20... Rotary compression part 22... Piston rotor 23... Cylinder 30... Scroll compression part 31... Fixed scroll 32... Orbiting scroll 34... Compression chamber 35... Discharge hole 39 Discharge cover 39S Discharge space 39h Through hole 40 Electric motor 41 Rotor 42 Stator 50 Discharge pipe 51 Discharge pipe main body 51b Base end portion 51d Opening facing portion 51g Outer peripheral surface 51s Tip end portion 52 Outer tube 52a One end 52s Tip 53 Connection tube member 53d Expanded diameter portion Da Axial direction Dr Radial direction H High pressure region M Intermediate pressure region W Brazing material

Claims (10)

a cylindrical housing extending in the axial direction and having an opening in the side;
a suction pipe for sucking refrigerant into the housing;
a discharge pipe for discharging the refrigerant compressed by the scroll compression part in the housing to the outside of the housing,
The discharge pipe is
a straight discharge pipe body penetrating through the opening and extending in a radial direction of the housing from inside the housing toward outside the housing;
A compressor in which an inner peripheral surface of the opening is separated from an opening facing portion of the outer peripheral surface of the discharge pipe main body that faces the inner peripheral surface. The compressor according to claim 1, wherein the outer diameter of the outer peripheral surface is smaller than the inner diameter of the inner peripheral surface. The discharge pipe is
3. The compressor according to claim 1, further comprising an outer pipe having one end fixed to said opening, extending radially outward of said housing, and having said discharge pipe main body inserted therein. The outer diameter of the discharge pipe body is smaller than the inner diameter of the outer pipe,
The compressor according to claim 3, wherein a brazing material is interposed between the inner peripheral surface of the outer pipe and the outer peripheral surface of the discharge pipe main body. 5. The compressor according to claim 4, wherein the brazing material is provided at least from the distal end portion of the discharge pipe main body to an opening facing portion where the outer peripheral surface of the discharge pipe main body and the inner peripheral surface of the opening face each other. 6. The tip end portion of the discharge pipe main body is arranged at the same position in the radial direction of the housing with respect to the tip end portion of the outer tube, or arranged radially inside the housing. compressor. a base end portion of the discharge pipe main body is fixed to a through hole formed in a discharge cover that covers the scroll compression portion provided in the housing;
The compressor according to any one of claims 1 to 6, wherein an intermediate portion of the discharge pipe main body is exposed in a space between the housing and the discharge cover. A connection pipe member to which an external pipe is connected is connected to the inside of the tip portion of the discharge pipe main body,
The compressor according to any one of claims 1 to 7, wherein the connection pipe member has a greater wall thickness than the discharge pipe main body. a rotating shaft provided with the orbiting scroll of the scroll compressing portion at one end and extending in the axial direction within the housing;
a rotary compression unit having a piston rotor provided at the other end of the rotating shaft,
The compressor according to any one of claims 1 to 8, wherein the refrigerant sucked into the housing from the suction pipe is compressed in two stages by the rotary compression section and the scroll compression section. 10. A compressor according to any preceding claim, wherein the refrigerant is carbon dioxide.

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