WO2016016917A1

WO2016016917A1 - Scroll compressor

Info

Publication number: WO2016016917A1
Application number: PCT/JP2014/069773
Authority: WO
Inventors: 幸野　雄; 柳瀬　裕一
Original assignee: 日立アプライアンス株式会社
Priority date: 2014-07-28
Filing date: 2014-07-28
Publication date: 2016-02-04

Abstract

This scroll compressor is provided with: a compression mechanism which comprises an orbiting scroll and a fixed scroll that meshes with the orbiting scroll to form a compression chamber; a frame which is positioned on the side of the orbiting scroll opposite of the fixed scroll, which is attached to the fixed scroll such that the frame and the fixed scroll together sandwich the orbiting scroll, and on which a primary bearing is formed; and a frame auxiliary member which is mechanically fastened from the bottom of the frame and is welded at the outer periphery to an airtight container. Since the scroll compressor is provided with a frame auxiliary member which is mechanically fastened from the bottom of the frame and is welded at the outer periphery to the airtight container, even when using an aluminum material in the compression mechanism, it is possible both to fix the compression mechanism to the airtight container and to suppress welding deformation of the compression mechanism.

Description

Scroll compressor

The present invention relates to a scroll compressor.

In refrigeration air conditioners, there is an increasing trend to change to refrigerants with low global warming potential (GWP). R32, R290, R1234ze etc. are mentioned as a candidate as a substitute refrigerant | coolant of R410A used with an air conditioner. When these candidate refrigerants are compared with R410A, R32 has a smaller molecular weight and increased leakage loss. Also, R290 and R1234ze have low capacity, and the displacement volume of the compressor must be increased. As a solution to such a problem, it is effective to reduce the displacement volume of the compressor and operate at high speed. However, when the scroll compressor is operated at a high speed, the crankshaft is bent due to the centrifugal force generated by the orbiting scroll and the motor, leading to a decrease in bearing reliability and an increase in vibration noise.

In order to avoid such a phenomenon, it is necessary to use a lightweight material such as aluminum for the orbiting scroll. However, when an aluminum material is used only for the orbiting scroll and a conventional iron-based material is used for the fixed scroll and the frame, the efficiency inside the compressor is reduced due to the gap in the compressor being enlarged due to the difference in the linear expansion coefficient. Therefore, it is desirable that the orbiting scroll, the fixed scroll and the frame are made of the same material.

On the other hand, a hermetic type is widely used as a compressor for refrigerating and air-conditioning. In this hermetic compressor, a compression mechanism and an electric motor are housed in a hermetic container, and the hermetic container and the compression mechanism are often fixed by tack welding. For example, there is Patent Document 1 regarding tack welding of such a sealed container and a compression mechanism.

JP 2003-239873 A

Sealed scroll compressors are generally tack welded between the sealed container and the frame, but if the compression mechanism is made of an aluminum material in order to cope with high speed, it is not possible to tack weld the sealed container and the frame. Have difficulty.

Patent Document 1 is not a technique for solving the problem of material welding, but in order to eliminate deformation of the frame due to tack welding, a support frame dedicated to tack welding is newly provided, and this support frame and the sealed container are tack welded. To do. In the configuration of Patent Document 1, since the support frame and the hermetic container are tack welded, if the support frame is made of an iron-based material, the hermetic container and the compression mechanism part are not attached to the support frame even if an aluminum material is used for the compression mechanism part. It can be fixed via. However, since the support frame is fastened with the fixed scroll and the bolt, when aluminum material is used for the compression mechanism, there is a possibility that the deformation of the fixed scroll may be restricted due to the difference in the linear expansion coefficient between the support frame and the fixed scroll. is there. When the deformation of the fixed scroll is constrained, a difference occurs in the amount of deformation with the orbiting scroll and the frame, and the gap inside the compressor is enlarged, and the efficiency is lowered.

The problem to be solved by the present invention is to enable the hermetic container and the compression mechanism part to be fixed even if an aluminum material is used for the compression mechanism part, and to suppress deformation of the compression mechanism part due to tack welding.

The scroll compressor of the present invention includes a hermetic container, a swivel base plate, a spiral swirl wrap standing on the swivel base plate, and a swirl formed on the opposite side of the swirl base plate. A compression mechanism unit comprising a orbiting scroll having a bearing, a fixed base plate, and a spiral fixed lap standing on the fixed base plate, and a fixed scroll that meshes with the orbiting scroll to form a compression chamber. And is located on the opposite side of the fixed scroll of the orbiting scroll, is attached to the fixed scroll so as to sandwich the orbiting scroll with the fixed scroll, and is mechanically fastened from below the frame on which the main bearing is formed, The outer peripheral portion is supported by a frame auxiliary member welded and fixed to the hermetic container, an electric motor portion that drives the compression mechanism portion, a slewing bearing, and a main bearing. A crankshaft that transmits the rotational force of the motor part to the compression mechanism part, an oil reservoir part that is located at the bottom of the sealed container and stores lubricating oil, and a discharge pipe that discharges the refrigerant compressed in the compression chamber outside the sealed container And comprising.

According to the present invention, even when an aluminum-based material is used for the compression mechanism portion, the sealed container and the compression mechanism portion can be fixed, and welding deformation of the compression mechanism portion can be suppressed.

1 is a longitudinal sectional view of a scroll compressor according to a first embodiment. Explanatory drawing of the oil supply structure of 1st Embodiment Explanatory drawing of the flow of the gas refrigerant of a 1st embodiment Main bearing cover perspective view of the first embodiment AA sectional view of FIG. The figure which showed the tack welding position of 2nd Embodiment Longitudinal sectional view of the scroll compressor of the third embodiment Explanatory drawing of the oil supply structure of 3rd Embodiment Explanatory drawing of the flow of the gas refrigerant of a 3rd embodiment Explanatory drawing of the oil supply structure of 4th Embodiment and the flow of a gas refrigerant Explanatory drawing of the oil supply structure of 5th Embodiment and the flow of a gas refrigerant Main bearing cover perspective view of the fifth embodiment

The scroll compressor of the present invention includes a hermetic container, a swivel base plate, a spiral swirl wrap standing on the swivel base plate, and a swirl formed on the opposite side of the swirl base plate. A compression mechanism unit comprising a orbiting scroll having a bearing, a fixed base plate, and a spiral fixed lap standing on the fixed base plate, and a fixed scroll that meshes with the orbiting scroll to form a compression chamber. And is mounted on the fixed scroll so that the orbiting scroll is sandwiched between the fixed scroll and the fixed scroll, and the frame including the main bearing is mechanically fastened from below the frame, and the outer peripheral portion is It is supported by a sealed container and a frame auxiliary member that is fixed by welding, an electric motor unit that drives the compression mechanism unit, a slewing bearing, and a main bearing. A crankshaft that transmits force to the compression mechanism, an oil reservoir that is located at the bottom of the sealed container and stores lubricating oil, and a discharge pipe that discharges the refrigerant compressed by the compression mechanism outside the sealed container. Prepare. According to the scroll compressor of the present invention, since the frame auxiliary member is mechanically fastened from below the frame and the outer peripheral part is welded and fixed to the sealed container, the sealed container can be used even if an aluminum-based material is used for the compression mechanism. And the compression mechanism portion can be fixed, and welding deformation of the compression mechanism portion can also be suppressed.

First, the first embodiment of the present invention will be described with reference to FIGS. 1 is a longitudinal sectional view of a scroll compressor, FIG. 2 is an explanatory view of an oil supply structure, FIG. 3 is an explanatory view of a flow of gas refrigerant, FIG. 4 is a perspective view of a main bearing cover, and FIG. FIG.

The scroll compressor 1 houses a compression mechanism unit 3 and an electric motor unit 4 that drives the compression mechanism unit 3 in a sealed container 2.

The sealed container 2 is configured by welding a lid chamber 2b and a bottom chamber 2c up and down to a cylindrical case 2a. A compression mechanism unit 3 is disposed at the upper part of the sealed container 2, and an electric motor unit 4 is disposed at the lower part. The lid chamber 2b is provided with a suction pipe 2d, and the case 2a is provided with a discharge pipe 2e.

The compression mechanism unit 3 includes a fixed scroll 5, a turning scroll 6, and a frame 9 that is fastened to the fixed scroll 5 with a bolt or the like and supports the turning scroll 6.

The orbiting scroll 6 is rotatably disposed opposite to the fixed scroll 5, and the suction chamber 10 and the compression chamber 11 are formed by the fixed scroll 5 and the orbiting scroll 6.

The frame 9 includes a main bearing 9a that rotatably supports the crankshaft 7. An orbiting bearing 6 a is provided on the lower surface side of the orbiting scroll 6, and an eccentric portion 7 b of the crankshaft 7 is connected thereto.

The Oldham ring 12 is disposed between the lower surface side of the orbiting scroll 6 and the frame 9. The Oldham ring 12 is mounted in a groove formed on the lower surface side of the orbiting scroll 6 and a groove formed in the frame 9. The Oldham ring 12 causes the orbiting scroll 6 to revolve by receiving the eccentric rotation of the eccentric portion 7b of the crankshaft 7 without rotating.

The stator 4a of the electric motor unit 4 is fixed to the sealed container 2 by press fitting, welding or the like. The rotor 4b is rotatably disposed in the stator 4a, and the crankshaft 7 is fixed to the rotor 4b.

There is an oil storage chamber below the motor unit 4, and the lubricating oil 13 for lubricating the sliding part is stored.

The crankshaft 7 includes a main shaft 7a and an eccentric portion 7b, and is supported by a main bearing 9a and a lower bearing 14 provided on the frame 9. The eccentric portion 7 b is formed integrally with the main shaft 7 a of the crankshaft 7 so as to be eccentric, and is fitted to the orbiting bearing 6 a provided on the back surface of the orbiting scroll 6. The crankshaft 7 is driven by the electric motor unit 4, and the eccentric part 7 b rotates eccentrically with respect to the main shaft 7 a, thereby causing the orbiting scroll 6 to rotate. A positive displacement oil pump 15 connected to the crankshaft 7 is installed below the lower bearing 14, and the lubricating oil 13 is supplied to the oil supply passage 7c by the rotational movement of the crankshaft 7.

The main bearing cover 8 (frame auxiliary member 8) that receives the lubricating oil 13 that lubricates the main bearing 9a is attached to the lower side of the main bearing 9a of the frame 9. As shown in FIG. 4, the main bearing cover 8 has a circular opening through which the crankshaft 7 penetrates at the center, and is made of an annular iron-based material when viewed from the crankshaft direction. The sealed container 2 and the main bearing cover 8 are tack welded at the welded portion 8a and fixed by the molten tack welded portion 17. The main bearing cover 8 is mechanically fastened and fixed to the lower part of the frame 9 with bolts or the like. As a result, the sealed container 2 and the compression mechanism 3 are fixed via the main bearing cover 8.

The flow of the lubricating oil 13 will be described with reference to FIG. The lubricating oil 13 supplied to the oil supply passage 7c by the oil supply pump 15 goes to the upper end of the crankshaft 7, and lubricates the swing bearing 6a and the main bearing 9a. Thereafter, the lubricating oil 13 is guided to a space formed by the frame 9 and the main bearing cover 8 and returned from the oil drain pipe 16 to the oil storage chamber.

Next, the flow of the gas refrigerant inside the sealed container 2 will be described with reference to FIG. The gas refrigerant discharged from the discharge port 5a flows into the space between the frame 9 and the stator 4a through the fixed scroll 5 and the outer

peripheral grooves

5b and 9b of the frame 9. As shown in FIG. 4, a gas passage 8b is formed in the annular surface of the main bearing cover 8 so as to penetrate from the frame 9 side to the stator 4a side, and the gas refrigerant flowing into the space passes through the gas passage 8b. Then, it is discharged from the discharge pipe 2e to the outside of the sealed container 2.

FIG. 5 shows a cross-sectional view taken along the line AA in FIG. As shown in FIG. 4, the main bearing cover 8 is provided with a welded portion 8 a having a diameter substantially the same as the inner diameter of the sealed container 2. The hermetic container 2 and the main bearing cover 8 are tack welded by the welded portion 8a and fixed by the molten tack welded portion 17. Here, although tack welding 17 is made into four places, the same effect is acquired even if it is less than four places from welding strength and welding space.

Although the structure of the first embodiment of the present invention has been described above, the effects are summarized below.

As explained in the background art, it is necessary to reduce the size and speed of the compressor in order to cope with the characteristics of low GWP R32, R290, and R1234ze. In order to increase the size and speed, it is necessary to make the compression mechanism portion 3 of an aluminum alloy or a magnesium alloy to reduce the weight, but it is difficult to fix the compression mechanism portion 3 and the sealed container 2 by welding.

In order to solve this problem, in this embodiment, a ferrous material is used for the main bearing cover 8 fixed to the frame 9, and a welded portion 8a for tack welding is provided on the outer peripheral portion. By adopting such a configuration, the welded portion 8a and the sealed container 2 can be tack-welded. Therefore, even if an aluminum alloy or the like is used for the compression mechanism unit 3, the sealed container 2 and the compression mechanism unit 3 are provided with the main bearing cover 8. It becomes possible to fix through.

Also, the end plate portion 6b of the orbiting scroll 6 is sandwiched between the fixed scroll 6 and the frame 9 with a 10 μm gap, and when the frame 9 is tack welded, this gap changes due to welding deformation. The deformation mode varies depending on the part shape, welding conditions, and the like. For example, if the deformation is performed in a direction in which the gap is widened, the orbiting scroll 6 is easily tilted, and the gap at the tip of the scroll wrap is widened, leading to an increase in leakage loss. On the contrary, if it deform | transforms in the direction which becomes small, the sliding loss of the end plate part 6b will increase. With respect to this problem, in the present invention, since the structure is such that the main bearing cover 8 is tack welded, such deformation of the frame can be suppressed.

Further, the main bearing cover 8 is fastened and fixed to the frame 9 with bolts or the like. However, since the gas passage 8b is provided, the gas passage 8b has a flexible structure even when tack-welded to the main bearing cover 8, and the frame. The propagation of deformation to 9 can be reduced.

Next, a second embodiment will be described with reference to FIG. The basic structure is the same as that of the first embodiment, and detailed description thereof is omitted.

The difference of the second embodiment from the first embodiment is the position of the tack welded portion 17. In the second embodiment, the position of the tack welded portion 17 is made to coincide with the center position of the main bearing 9a in the axial direction (shown by a one-dot chain line). As described above, in this embodiment, the position of the tack welded portion 17 is made coincident with the axial center of the main bearing 9a. Therefore, the moment applied to the tack welded portion 17 by the bearing load of the main bearing 9a can be reduced, and vibration and noise are reduced. it can.

Next, a third embodiment will be described with reference to FIGS. FIG. 7 is a longitudinal sectional view of the scroll compressor of the third embodiment, FIG. 8 is an explanatory view of an oil supply structure of the third embodiment, and FIG. 9 is an explanatory view of the flow of the gas refrigerant of the third embodiment. The basic structure is the same as that in each of the above embodiments, and detailed description thereof is omitted.

The third embodiment differs from the first embodiment in the oil supply structure. In the present embodiment, the lubricating oil 13 is supplied to each sliding portion by the differential pressure between the back pressure chamber 18 provided on the back surface of the orbiting scroll 6 and the oil storage chamber that is the discharge pressure atmosphere. The pressure in the back pressure chamber 18 is such as a back pressure control valve having a check valve structure conventionally used as a back pressure control mechanism of a scroll compressor, an intermediate hole communicating the compression chamber and the back pressure chamber in the middle of compression, or the like. Thus, the pressure is controlled between the discharge pressure and the suction pressure.

The oil supply structure of the third embodiment will be described with reference to FIG. An oil supply pipe 19 is provided at the lower end of the crankshaft 7, and the lubricating oil 13 is supplied from the oil supply pipe 19 to the oil supply passage 7 c using the differential pressure between the oil storage chamber and the back pressure chamber 18. Part of the lubricating oil 13 flowing through the oil supply passage 7c is supplied to the main bearing 9a from the lateral hole 7d, and the remaining lubricating oil 13 is supplied to the swivel bearing 6a. The lubricating oil 13 supplied to the slewing bearing 6 a and the main bearing 9 a merges again at the thrust receiving surface 7 e of the crankshaft 7 and flows into the back pressure chamber 18.

The seal bearing 20 (frame auxiliary member 20) is mechanically fastened to the frame 9 with bolts or the like below the main bearing 9a. The seal bearing 20 serves to seal the main bearing 9a from the sealed container 2 so that the gas refrigerant in the sealed container 2 does not flow into the main bearing 9a and cause poor lubrication.

Further, a welded portion 20a facing the inner diameter of the sealed container 2 is provided on the outer periphery of the seal bearing 20, and the welded portion 20a is tack welded to the sealed container 2.

peripheral grooves

5b and 9b of the frame 9. A gas passage 20b is formed in the seal bearing 20, and the gas refrigerant flowing into the space is discharged from the discharge vessel 2e to the outside through the gas passage 20b.

The structure of the third embodiment of the present invention has been described above, but the effects are summarized below.

As described in the operation and effect of the first embodiment, in order to reduce the size and speed, it is necessary to configure the compression mechanism portion 3 with an aluminum alloy, a magnesium alloy, or the like to reduce the weight. It becomes difficult to fix the welding to the sealed container 2.

In order to solve this problem, the present invention uses a ferrous material for the seal bearing 20 fixed to the frame 9 and provides a welded portion 20a for tack welding on the outer peripheral portion. By adopting such a configuration, the welded portion 20a and the sealed container 2 can be tack-welded. Therefore, even if an aluminum alloy or the like is used for the compression mechanism portion 3, the sealed container 2 and the compression mechanism portion 3 are connected to the seal bearing 20. It becomes possible to fix through.

Also, the end plate portion 6b of the orbiting scroll 6 is sandwiched between the fixed scroll 6 and the frame 9 with a 10 μm gap, and when the frame 9 is tack welded, this gap changes due to welding deformation. The deformation mode varies depending on the part shape, welding conditions, and the like. For example, if the deformation is performed in a direction in which the gap is increased, the orbiting scroll 6 is easily tilted, and the gap at the tip of the scroll wrap is enlarged, leading to an increase in leakage loss. On the contrary, if it deform | transforms in the direction which becomes small, the sliding loss of the end plate part 6b will increase. In this embodiment, since tack welding is performed on the seal bearing 20 in this embodiment, such deformation of the frame can be suppressed.

Further, since the seal bearing 20 is provided with the gas passage 20b, the frame 9 has a flexible structure even when tack-welded to the seal bearing 20 and is fastened to the seal bearing 20 with bolts or the like. The propagation of deformation to can be reduced.

Next, a fourth embodiment will be described with reference to FIG. FIG. 10 is an explanatory diagram of the oil supply structure and the flow of the gas refrigerant according to the fourth embodiment. Here, the broken line is the flow of the lubricating oil, and the solid line is the flow of the gas refrigerant. The basic structure is the same as that in each of the above embodiments, and detailed description thereof is omitted.

The difference between the fourth embodiment and the first embodiment is the flow of the gas refrigerant in the sealed container 2. A back pressure chamber 18 is provided on the frame 9 side of the orbiting scroll 6. The pressure in the back pressure chamber 18 is controlled to an intermediate pressure between the discharge pressure and the suction pressure by a back pressure control mechanism (not shown) conventionally used in a scroll compressor.

A seal ring 21 is provided on the lower end surface of the orbiting scroll 6 and partitions the back pressure chamber 18 and the space around the crankshaft 7 from the seal ring 21. A groove (not shown) for supplying a part of the lubricating oil 13 lubricating the orbiting bearing 6 a to the back pressure chamber 18 is provided on the lower end surface of the orbiting scroll 6. The lubricating oil 13 supplied to the back pressure chamber 18 is then supplied to the suction chamber 10. In the compression stroke, the lubricating oil 13 supplied to the suction chamber 10 seals a minute gap in the compression chamber 11 and is discharged from the discharge port 5a together with the gas refrigerant. For this reason, the gas refrigerant discharged from the discharge port 5a contains the lubricating oil 13 used for sealing the gap in the compression chamber 11 at a rate of 5 to 10 wt% with respect to the circulation amount of the gas refrigerant.

The oil-rich gas refrigerant discharged from the discharge port 5a flows into the space between the frame 9 and the stator 4a through the fixed scroll 5 and the outer

peripheral grooves

5b and 9b of the frame 9. A cylindrical partition plate 8c connected to the main bearing cover 8 is disposed below the main bearing cover 8 and between the gas passage 8b of the main bearing cover 8 and the discharge pipe 2e. The gas refrigerant is guided from the space between the frame 9 and the stator 4a to the motor unit 4 side through the gas passage 8b. However, the gas refrigerant does not flow to the discharge pipe 2e by the partition plate 8c, and the stator 4a and the rotor 4b. Flows to the oil storage chamber. Here, the lubricating oil 13 is returned to the oil storage chamber, and only the gas refrigerant flows out of the discharge pipe 2e through the core cut 4c of the stator 4a.

As described above, in the fourth embodiment, the oil-rich gas refrigerant guided to the space between the compression mechanism unit 6 and the motor unit 4 is discharged from the discharge pipe by the gas passage 8b and the partition plate 8c of the main bearing cover 8. Since it can flow to the oil storage chamber side without interfering with 2e, the amount of oil flowing out from the discharge pipe 2e can be reduced.

Next, a fifth embodiment will be described with reference to FIGS. FIG. 11 is an explanatory view of the oil supply structure and the flow of the gas refrigerant of the fifth embodiment, and FIG. 12 is a perspective view of the main bearing cover of the fifth embodiment. Here, the broken line is the flow of the lubricating oil, and the solid line is the flow of the gas refrigerant. The basic structure is the same as that in each of the above embodiments, and detailed description thereof is omitted.

peripheral grooves

5b and 9b of the frame 9. The gas refrigerant passes through the outer peripheral groove 8d of the main bearing cover 8 and is guided to the electric motor unit 4 side, and flows from the outer space of the partition plate 8c to the oil storage chamber through the core cut 4c. Here, the lubricating oil 13 is returned to the oil storage chamber, and only the gas refrigerant passes between the stator 4a and the rotor 4b and is guided to the inner space of the partition plate 8c. The discharge pipe 2e is inserted from the discharge pipe insertion hole 8e of the main bearing cover 8 and communicates with the inner space of the partition plate 8c (the inlet of the discharge pipe 2e passes through the partition plate 8c and is located in the inner space). The gas refrigerant led to the inner space flows out from the discharge pipe 2e.

As described above, in the fifth embodiment, the oil-rich gas refrigerant guided to the space between the frame 9 and the stator 4a interferes with the discharge pipe 2e by the outer peripheral groove 8d and the partition plate 8c of the main bearing cover 8. Therefore, the amount of oil flowing out from the discharge pipe 2e can be reduced.

DESCRIPTION OF SYMBOLS 1 Scroll compressor 2 Sealed container 2a Case

2b Cover chamber

2c Bottom chamber

2d Suction pipe 2e Discharge pipe 3 Compression mechanism part 4 Electric motor part 4a Stator 4b Rotor 4c Core cut 5 Fixed scroll 5a Discharge port 5b Outer peripheral groove 6 Orbiting scroll 6a Orbiting bearing 6b End plate part 7 Crankshaft 7a Main shaft 7b Eccentric part 7c Oil supply passage 7d Horizontal hole 7e Thrust receiving surface 8 Main bearing cover (frame auxiliary member)
8a welded portion 8b gas passage 8c partition plate 8d outer peripheral groove 8e discharge pipe insertion hole 9 frame 9a main bearing 9b outer peripheral groove 10 suction chamber 11 compression chamber 12 Oldham ring 13 lubricating oil 14 lower bearing 15 oil pump 16 exhaust oil pipe 17 tack welding Part 18 Back pressure chamber 19 Oil supply pipe 20 Seal bearing (frame auxiliary member)
20a welded portion 20b gas passage 21 seal ring

Claims

A sealed container;
In the sealed container,
An orbiting scroll having an orbiting base plate, a spiral orbiting wrap standing on the orbiting base plate, and an orbiting bearing formed on the opposite side of the orbiting base plate from the orbiting wrap; and
A fixed scroll having a fixed base plate and a spiral fixed wrap standing on the fixed base plate, and meshing with the orbiting scroll to form a compression chamber;
A compression mechanism comprising:
A frame that is located on the opposite side of the fixed scroll of the orbiting scroll, is attached to the fixed scroll so as to sandwich the orbiting scroll with the fixed scroll, and includes a main bearing;
A frame auxiliary member that is mechanically fastened from below the frame and whose outer peripheral portion is fixed to the sealed container by welding;
An electric motor that drives the compression mechanism;
A crankshaft that is supported by the slewing bearing and the main bearing, and that transmits the rotational force of the electric motor unit to the compression mechanism unit;
An oil reservoir that is located at the bottom of the sealed container and stores lubricating oil;
A discharge pipe for discharging the refrigerant compressed by the compression mechanism section outside the sealed container;
A scroll compressor characterized by comprising:
In claim 1,
The scroll compressor, wherein the orbiting scroll, the fixed scroll, and the frame are made of an aluminum alloy or a magnesium alloy, and the frame auxiliary member is made of an iron-based material.
In claim 1 or 2,
The frame auxiliary member partitions the compressor part space in which the compression mechanism part is arranged and the motor part space in which the electric motor part is arranged, and the frame auxiliary member includes the compressor part space and the electric motor part space. A scroll compressor characterized in that it has a communication passage that communicates with the compressor.
In claim 3,
A space between the frame auxiliary member and the electric motor part, which is disposed below the frame auxiliary member, and a crankshaft side space located on the crankshaft side and a closed vessel side space located on the closed vessel side Has a partition plate,
The refrigerant compressed by the compression mechanism is discharged from the discharge pipe from the communication path via the inner space, the oil reservoir, and the outer space.
In claim 3,
The communication path is formed in an outer peripheral portion of the frame auxiliary member,
A space between the electric motor unit and the frame auxiliary member, which is disposed below the frame auxiliary member, and a crankshaft side space located on the crankshaft side and a closed vessel side space located on the closed vessel side Has a partition plate,
A refrigerant inlet of the discharge pipe opens into the inner space;
The refrigerant compressed by the compression mechanism is discharged from the discharge pipe from the communication path via the outer space, the oil reservoir, and the inner space.