JP2002349461A - Hermetically closed scroll compressor for helium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent abnormal vibration of an injection pipe, and to reduce oil rise quantity and noise in a hermetically closed scroll compressor for helium. SOLUTION: An oil plate comprises an imperforate collision plate functioning part disposed in a half circumferential part functioning so as to prevent gas flow from reaching the oil level of an oil sump and a perforated discharge oil passage functioning part having a sufficient oil discharging function disposed in a half circumferential part on the opposite side of the former half circumferential part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed type scroll compressor for helium used in a refrigeration cycle, and is suitable for a helium compressor for a cryopump device in an ultra-high vacuum field using helium gas as a working gas. The present invention relates to a sealed helium scroll compressor.

[0002]

2. Description of the Related Art A conventional hermetic scroll compressor for helium employs a so-called high-pressure chamber system in which the inside of a sealed container is maintained at a high pressure. Among those employed, for example, JP-A-61-11279
As disclosed in Japanese Patent Application Publication No. 4 (1999) -2002, there is a configuration in which lubricating oil stored in the bottom of a closed container is once guided to the outside of the container and injected again into the compressor section of the scroll compressor via an oil cooler. .

[0003]

However, the prior art described above may have the following problems depending on the structure of the cycle piping of the helium compressor unit. FIG. 11 shows a prior art bottom chamber structure. As shown in FIG. 11, the oil suction pipe 30a of the oil outlet 30
In some cases, a phenomenon that helium gas easily accumulates in the upper portion of the helium. This is because the helium gas passing vertically through the status outer peripheral passage 25b at the outer edge of the electric motor stator 3a by the dozen or more rectangular passages 46c evenly provided on the outer peripheral portion of the oil plate 46 according to the prior art. It has been experimentally found that the problem is caused by passing through the passage 46c, being below the oil plate 46, and accumulating there. Moreover, as shown in FIG. 11, it was found that the oil level of the oil reservoir in the bottom chamber was pushed down by the wind pressure of the gas flow.

Therefore, helium gas is mixed into the lubricating oil 24 from the suction port of the oil suction pipe section 30a of the oil outlet section 30 described above. as a result,
Because gas is intermittently mixed into the injection pipe,
The problem that an unpleasant abnormal sound is generated together with the abnormal vibration and the noise level becomes high even for the compressor unit may occur when the oil injection amount is large.

The oil plate 46 shown in FIGS. 9 and 10 of the prior art has a proper structure in the case of an air-conditioning scroll compressor, but has a closed helium scroll through which a large amount of injection oil passes. In the case of a compressor, the passage 46
a, 46b, and 46c, the entire passage area is small
Oil accumulates on the upper surface, and consequently promotes the gas accumulation phenomenon and the oil rising phenomenon of the sealed container itself.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to prevent abnormal vibration of an injection pipe in a closed type helium scroll compressor.
An object of the present invention is to provide an oil-filled hermetic helium scroll compressor capable of reducing noise and improving the reliability and quality of the scroll compressor.

[0007]

Means for Solving the Problems To achieve the above object, a closed type helium scroll compressor according to the present invention is characterized by what is described in the claims. In particular, the hermetic scroll compressor for helium according to the invention of claim 1 as an independent claim,
Inside the closed container, a compressor unit comprising a combination of a fixed scroll, an orbiting scroll and a frame, and an electric motor unit comprising a stator and a rotor for driving the compressor unit are housed and arranged. An oil injection mechanism for cooling the working helium gas is provided, and an outer space inside the sealed container from which the compressed helium gas is discharged and a helium gas discharge pipe mounted outside the frame of the compressor unit are provided inside the closed container above the electric motor. A frame outer peripheral passage communicating with the middle space is provided, and the outer space of the stator of the electric motor unit communicates with the inner space of the closed container and the lower space of the closed container below the motor, and one is connected to the frame outer peripheral passage. A plurality of opposed stator outer peripheral passages are provided, while an oil plate covering an oil reservoir is provided at the bottom of the closed vessel, and the oil reservoir is connected to a rotating shaft that supplies lubricating oil to each bearing. An oil outlet having an oil suction pipe, immersed in the oil reservoir in the body of the bottom cap, and discharging a lubricating oil integrally formed with an oil connection part serving as a connection port between the oil suction pipe part and an external pipe; In the hermetic helium scroll compressor provided with a portion, the oil plate is a non-perforated collision plate function portion provided in a half-peripheral portion functioning to prevent the flow of the gas to the oil surface of the oil reservoir. And a perforated discharge oil passage function portion having a sufficient oil discharge function provided on a half circumference portion opposite to the half circumference portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a longitudinal sectional view and a lubrication system diagram of an oil-filled hermetic helium scroll compressor according to the present invention. FIG. 2 is a sectional view taken along line CC of FIG. This embodiment will be described with reference to FIGS.

In FIG. 1, a scroll compressor unit is accommodated in the upper part of the closed container 2 and a motor unit 3 is accommodated in the lower part. The inside of the sealed container 2 is divided by a frame 11 into a discharge chamber 1a, which is an upper space in the sealed container, and a motor room 1b, which is a middle space in the sealed container.

The scroll compressor section includes a fixed scroll 5
And the orbiting scroll 6 are meshed with each other to form a compression chamber 8 which is a closed space. The fixed scroll 5 is composed of a disk-shaped end plate 5a and a wrap 5b standing upright and formed into an involute curve or a curve similar thereto.
A suction port 14 is provided at an outer peripheral portion, and a discharge port 10 is provided at a central portion.

As shown in FIG. 1, the working gas is helium gas, and an oil injection pipe 31 for cooling the working helium gas is provided in the end plate portion 5a of the fixed scroll 5 through the closed vessel 2. The orbiting scroll 22 is connected to the oil injection port 22, and the opening of the oil injection port 22 faces the tooth surface of the wrap 6 b of the orbiting scroll 6.

The orbiting scroll 6 has a disk-shaped end plate 6a.
And a wrap 6b standing upright and having the same shape as the wrap of the fixed scroll, and a boss 6c formed on the opposite wrap surface of the end plate. The frame 11 has bearings 26 and 27 formed in the center, and these bearings 2 and 27 are formed.
The rotating shaft 15 is supported by the shafts 6 and 27, and the eccentric shaft 15a at the tip of the rotating shaft 15 is inserted into the boss 6c so as to be capable of turning.

The fixed scroll 5 is fixed to the frame 11 by a plurality of bolts, and the orbiting scroll 6 is supported on the frame 11 by an Oldham mechanism 12 comprising an Oldham ring and an Oldham key. The scroll 5 is configured to make a revolving motion without rotating.

An electric motor shaft 15b is integrally connected to the lower part of the rotating shaft 15, and the electric motor unit 3 is directly connected thereto. A vertical suction pipe 17 is connected to the suction port 14 of the fixed scroll 5 so as to penetrate the sealed container 2, and the discharge chamber 1 a in which the discharge port 10 is open is connected to the electric motor via frame outer peripheral passages 18 a and 18 b. It communicates with the chamber 1b. A discharge pipe 20 penetrating through the closed casing 2 is provided in the motor room 1b. The upper and lower portions of the motor room 1b are
, a plurality of stator outer peripheral passages 25 between the motor stator 3a and the motor rotor 3b.
And through a gap.

Reference numerals 9a and 9b denote balance weights and auxiliary weights for canceling the centrifugal force generated by the orbiting movement of the orbiting scroll 6. Further, between the suction pipe 17 and the fixed scroll 5, an O-ring 21 for sealing the high pressure portion and the low pressure portion is provided.

As shown in FIG. 1, a space 23 (hereinafter referred to as a back pressure chamber) surrounded by a scroll compressor section and a frame 11 is formed on the back surface of the end plate of the orbiting scroll 6. An intermediate pressure between the suction pressure and the discharge pressure is introduced into the back pressure chamber 23 through the fine holes 6d formed in the end plate of the orbiting scroll, and an axial force for pressing the orbiting scroll 6 against the fixed scroll 5 is applied. Have given.

The lubricating oil 24 is stored in an oil reservoir at the bottom of the closed container 2. The lubricating oil 24 is generated by a differential pressure between the high pressure in the closed container 2 and the intermediate pressure in the back pressure chamber 23. After being sucked up by the oil wicking pipe 13, the oil is lifted up in the central hole 50 in the rotary shaft 15 and supplied to the slewing bearing 32, and from the auxiliary bearing 26 to the main bearing 27, which is a cylindrical roller bearing, through the horizontal hole 51. Is done. The oil supplied to each of the bearing portions 26, 27, 32 passes through the back pressure chamber 23 and the compression chamber 8 of the scroll wrap.
And mixed with the compressed gas, and then discharged together with the discharge gas into the discharge chamber 1a. 40 is the lubricating oil 2
4 shows an oil plate disposed on the oil surface of No. 4;

An oil outlet 30 is provided at the bottom of the hermetically sealed container 2 for taking out the lubricating oil 24 at the bottom outside the container.
An oil outlet portion 30 is provided in the body portion of the bottom cap. The oil outlet portion 30 has an oil joint portion 30b serving as a connection port between the oil suction pipe portion 30a and an external pipe. Non-perforated collision plate function part 40 provided on a half-peripheral part that functions so as to prevent the flow of gas in 1c
b and a perforated oil passage function having a sufficient oil drainage function provided on a half-peripheral portion opposite to the half-peripheral portion for returning the injection oil flowing into the space 1c below the motor chamber to the bottom chamber oil reservoir. An oil plate 40 having both functions of the portions 40a, 40c, and 40d is provided. In the case of FIG. 1, the left half circumference is the collision plate function part 40b, and the right half circumference is the discharge oil passage function part 4b.
0a, 40c, and 40d.

An oil injection pipe 31 for injecting oil into the compression chamber 8 in the middle of the compression of the scroll compressor section is provided at the upper part of the closed casing 2. The oil injection pipe 31 communicates with the compression chamber 8 via an oil injection port 22 formed in the end plate 5 a of the fixed scroll 5.

The oil outlet 30 and the oil injection pipe 31 are connected via an oil pipe 36 a and a throttle 60 with an oil cooler 33 interposed.

With the above configuration, when the motor shaft 15b directly connected to the motor rotor 3b rotates and the eccentric shaft 15a rotates eccentrically, the orbiting scroll 6 makes a revolving motion via the revolving bearing 32. Due to this swirling motion, the compression chamber 8 gradually moves to the center and the volume decreases.

The working gas enters the suction chamber 5f from the suction pipe 17 via the suction port 14, and the lubricating oil 24 that has lubricated the bearings 26, 27 and 32 is supplied to the frame chamber 11f on the outer peripheral portion of the orbiting scroll end plate of the orbiting scroll 6. Flows into the suction chamber 5f through a small gap or the like and mixes with the working gas. The working gas containing the lubricating oil 24 via the bearings 26, 27 and 32 and the lubricating oil 24 injected from the oil injection port 22 is compressed in the compression chamber 8 and discharged from the discharge port 10 to the discharge chamber 1a. To the outer peripheral passages 18a, 18
b to the motor room 1b. The solid arrows indicate the flow of the helium gas as the working gas, and the broken arrows indicate the flow of the lubricating oil 24.

The helium gas and the lubricating oil 24 flow from the narrow frame outer peripheral passages 18a and 18b to the motor room 1b in a wide space.
The main flow passes through the stator outer peripheral passage 25b at the outer edge of the motor stator 3a in the vertical direction, and reaches the oil plate 41 of the present invention. On the other hand, the flow direction of the mixed flow colliding with the upper surface of the motor stator 3a changes, and in the process, a part of the oil contained in the gas is separated, and the working gas is discharged from the discharge pipe 2
Outflow into 0.

On the other hand, the lubricating oil 24 flows down through the gap at the outer periphery of the motor rotor and stays at the bottom of the closed casing 2. The lubricating oil 24 stored at the bottom of the closed container 2 has the oil level kept horizontal and the discharge pressure in the closed container 2 without mixing helium gas and the pressure of the compression chamber 8 related to the oil injection port 22 and the pressure. The oil suction pipe section 30a of the oil outlet section 30
From the oil outlet 30. The lubricating oil 24 that has flowed into the oil outlet 30 reaches the oil cooler 33 through the oil injection pipe 36, and after being appropriately cooled here,
The oil is injected into the compression chamber 8 through the oil pipe 36a, the oil injection pipes 36b and 31 and the oil injection port 22.

The lubricating oil 24 injected into the compression chamber 8 has a function of cooling the working gas in the compression chamber 8 and lubricating a sliding portion such as a scroll wrap tip. And
After being compressed together with the working gas, the lubricating oil 24 is discharged from the discharge port 10 to the discharge chamber 1a, separated from the working gas in the electric motor chamber 1b, and accumulates at the bottom of the closed casing 2 as described above. Oil is supplied to the bearings 26, 27, and 32 via an oil suction pipe 13 and an oil supply passage in the rotary shaft 15 by a differential pressure between the pressure in the sealed container 2 and the intermediate pressure in the back pressure chamber 23. Done.

The operation of the present invention will be described with reference to FIGS. In FIG. 3, the assembly is performed such that the end S point of the oil plate 41 matches the center end R point of the frame outer peripheral passages 18a and 18b in FIG. Oil plate 4
1 is assembled so that the point S of the end coincides with the point Q of the center end of the stator outer peripheral passage 25b in FIG.

In FIG. 5, a narrow frame outer peripheral passage 18 is shown.
The main flow of the lubricating oil 24 and the gas that has flowed into the motor chamber 1b in the wide space from a and 18b passes through the stator outer peripheral passage 25b at the outer edge of the motor stator 3a in the vertical direction and reaches the oil plate 41 of the present invention. Therefore, the helium gas flow first collides with the collision plate function portion 41b which prevents the oil surface from being stirred by the gas flow in the space 1c below the electric motor, and changes its direction in the horizontal direction. At this time, the lubricating oil 24 in the gas is separated.

Next, the injection oil of the lubricating oil 24 flowing into the space 1c below the motor chamber is dropped downward at the large and small holes of the discharge oil passage function portions 41a, 41c and 41d for returning the oil to the bottom chamber oil reservoir. I do. The oil plate 41 has a structure of an annular reinforcing rib 41p (see FIG. 4) for increasing rigidity in order to manufacture a thin plate of about 1 mm by press molding using a die. As shown in FIG.
The collision plate function portion 41b is provided on a half-peripheral portion, and the discharge oil passage function portions 41a, 41c, and 41d are provided on the opposite half-periphery portion. .

For this reason, as shown in FIG. 5, the phenomenon that the oil accumulates on the upper side of the oil plate 41 is eliminated, and the disadvantage that the oil accumulates there in the conventional example is eliminated. Even if the oil level is lowered and is below the oil plate 41 near the oil plate 41, the oil level is maintained horizontally and uniformly.
The helium gas does not enter the lubricating oil 24 from the inflow port of the oil suction pipe section 30a.

In FIG. 5, the body 2 of the bottom cap 2c is shown.
u, an oil outlet 30 is provided, which is formed integrally with an oil joint 30b serving as a connection port between the oil suction pipe 30a and the oil injection pipe 36, and the oil suction pipe 30a faces upward as shown in FIG. The oil suction port is located at a position above the lowermost end of the oil suction pipe 13 provided at the lower end of the rotary shaft 15 for supplying oil to the swing bearing portion 32 and the auxiliary bearing portion 26 at the lower end of the frame 11. is there.

The embodiment shown in FIG. 1 and FIG.
0, the oil suction port of the oil suction pipe portion 30a facing upward
Even if the rotation axis 15 is inclined about 10 degrees with respect to the vertical axis,
In the embodiment characterized in that the oil suction pipe 13 provided at the lower end of the rotary shaft 15 is located at a position higher than the lowermost end of the oil suction pipe 13, there is an effect that it is possible to prevent running out of oil supply to the bearing portion. .

FIG. 6 is a sectional view taken along the line DD of FIG. FIG.
, Between the lower end of the motor section 3 and the oil outlet section 30,
An oil plate 41 is provided on the inner wall surface of the sealed container 2 of the compressor.
FIG. 6 shows the positional relationship between the position of the stator outer peripheral passage 25b provided on the outer peripheral portion of the motor stator 3a and the oil plate 41. The stator outer peripheral passages 25a, 25c, 25
d mainly serves as a passage for the helium gas flowing upward.

In the case of a helium compressor through which a large amount of injection oil passes, a passage 46 for air conditioning is used.
2 to 2.5 times larger than the total passage area of a, 46b, 46c
This doubles the passage area. In the case of the helium compressor, the helium gas does not dissolve in the lubricating oil 24 unlike the refrigerant Freon 22, so that the lubricating oil 24 is not diluted by the refrigerant, and the oil viscosity increases several times. Therefore, in order to return the lubricating oil 24a (see FIG. 11) accumulated on the oil plate 46 to the bottom chamber portion, it is necessary to secure a large passage area in order to greatly reduce the passage resistance. Specifically, it is practical to set the discharge oil passage area of the oil plate 41 to the following ratio.

Zs = 0.25 to 0.35 (1) where, Zs is the total discharge oil passage area Bs (cm ² ) of the oil plate.
(= B) of the compressor and the stroke volume Vth (cm ³ / rev) of the compressor
s / Vth) The total passage area ratio of the passages 46a, 46b, 46c for air conditioning is Zs = 0.07 to 0.1 or less.

The oil plate 4 shown in FIG.
In order to greatly reduce the passage resistance for returning the lubricating oil 24a collected on the bottom 6 to the bottom chamber, the oil plates 40 and 41 are provided between the lower end of the motor and the oil outlet 30 in the casing 2b of the compressor. It is also characterized in that the discharge oil passage area Bs of the oil plates 40, 41 is set to be at least twice the total area of the stator outer peripheral passage 25 provided on the outer peripheral portion of the motor stator 3a.

FIGS. 7 and 8 show another embodiment of the oil plate 42. FIG. As shown in both figures, the oil plate structure has the above-mentioned collision plate function part only at a substantially half circumference. The above-described discharge oil passage function part has a plate structure cut away, and the adverse effect of the oil level stirring effect due to the gas flow can be suppressed to a smaller extent. Also in this structure, the operation and effect of the present invention can be obtained.

[0038]

According to the present invention, the following effects can be obtained. (1) The helium gas is prevented from being mixed into the lubricating oil from the inlet of the oil suction pipe at the oil outlet, the abnormal vibration of the injection pipe is eliminated, and accidents such as cracks in the pipe can be prevented. (2) Unpleasant abnormal noise is eliminated, the noise of the compressor unit as a whole is reduced, and the quality of the product is improved. (3) Since the oil level in the bottom chamber is always kept horizontal, the phenomenon of running out of oil supply to the bearing is eliminated, and the reliability of the compressor can be improved. (4) In the case of a helium compressor through which a large amount of injection oil passes, the passage area of the oil plate is sufficiently ensured, and the effect of reducing the oil rise of the sealed container itself can be obtained.

From the above, it is possible to provide an oil-filled hermetically sealed helium scroll compressor in which the reliability and quality of the helium scroll compressor are improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an oil-filled hermetic helium scroll compressor according to the present invention, and a lubrication system diagram.

FIG. 2 is a sectional view taken along line CC of FIG.

FIG. 3 is a plan view showing an embodiment of an oil plate.

FIG. 4 is a longitudinal sectional view of an embodiment of an oil plate.

FIG. 5 is an enlarged partial longitudinal sectional view of an oil outlet portion and a peripheral portion of an oil plate in FIG. 1;

FIG. 6 is a sectional view taken along line DD of FIG. 1, showing a positional relationship between an oil plate and an electric motor stator.

FIG. 7 is a plan view showing another embodiment of the oil plate.

FIG. 8 is a longitudinal sectional view of another embodiment of the oil plate.

FIG. 9 is a plan view showing a conventional oil plate structure.

FIG. 10 is a longitudinal sectional view showing a conventional oil plate structure.

FIG. 11 is an enlarged partial longitudinal sectional view of a peripheral portion of an oil outlet in a state where an oil level of a bottom chamber is inclined by a conventional oil plate structure.

[Explanation of symbols]

1a: discharge chamber 1b: electric motor room 1c: space below the electric motor 2 ... airtight container 2b ... side wall 2c ... bottom cap 2u ... body part 3: electric motor part 3a ... electric motor stator 3b ... electric motor rotor 5 ... fixed scroll 5a ... mirror plate 5b ... Lapping 5f Suction chamber 6 Revolving scroll 6a End plate 6b Lapping 6c Boss 6d Pore 8 Compression chamber 9a Balance weight 9b Sub weight 10 Discharge port 11 Frame 11f Frame chamber 12 Oldham mechanism DESCRIPTION OF SYMBOLS 13 ... Oil suction pipe 14 ... Suction port 15 ... Rotating shaft 15a ... Eccentric shaft 15b ... Electric motor shaft 17 ... Suction pipe 18a, 18b ... Frame outer peripheral passage 20 ... Discharge pipe 21 ... O-ring 22 ... Oil injection port 23 ... Back Pressure chambers 24, 24a: lubricating oils 25, 25a, 25b, 25c, 25d: stator outer peripheral passages 26: auxiliary bearings 27: main shaft Reference Signs List 30: Oil outlet part 30a: Oil suction pipe part 30b: Oil joint part 31: Oil injection pipe 32: Swivel bearing 33: Oil cooler 36, 36b: Oil injection pipe 36a: Oil pipe 40, 41, 42, 46: Oil Plates 40a, 40c, 40d: Exhaust oil passage function 40b: Impact plate function 41a, 41c, 41d: Exhaust oil passage function 41b: Impact plate function 41p: Reinforcement ribs 46a, 46b, 46c: Passage 50: Central hole 51 ... side hole 60 ... throttle

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasushi Izu, 390 Muramatsu, Shimizu-shi, Shizuoka Pref.Hitachi Air Conditioning Systems Co., Ltd. Shimizu Production Headquarters F-term (reference) 3H029 AA02 AA14 AB04 BB05 BB35 CC02 CC09 CC16 CC23 CC33 CC44 3H039 AA03 AA06 BB02 BB16 CC01 CC12 CC27 CC33 CC35 CC42

Claims (5)

[Claims] 1. A compressor unit comprising a fixed scroll, an orbiting scroll and a frame in a closed container,
An electric motor unit comprising a stator and a rotor for driving the compressor unit is housed and disposed, and the compressor unit is provided with an oil injection mechanism for cooling working helium gas, and is provided outside a frame of the compressor unit. A frame outer peripheral passage communicating the upper space in the sealed container from which the compressed helium gas is discharged and the inner space in the sealed container on the upper side of the electric motor to which the discharge pipe for the helium gas is attached, and the outer periphery of the stator of the electric motor portion, The middle space in the closed vessel communicates with the lower space in the closed vessel below the motor, one of which is provided with a plurality of stator outer circumferential paths facing the frame outer circumferential path, while the bottom of the closed vessel is covered with an oil reservoir. An oil plate is provided, having an oil suction pipe connected to a rotating shaft that supplies lubricating oil to each bearing portion in the oil reservoir,
For a sealed type helium, which is provided with an oil outlet that is immersed in the oil reservoir and is provided with an oil joint unit that serves as a connection port between an oil suction pipe unit and an external pipe, in a body portion of a bottom cap. In the scroll compressor, the oil plate has a non-perforated collision plate function portion provided on a semi-circumferential portion functioning to prevent the flow of the gas to the oil surface of the oil reservoir, and a side opposite to the semi-circular portion. A hermetic scroll compressor for helium, comprising: a perforated drain oil passage function part having a sufficient oil drain function provided on a half-peripheral part of the scroll compressor. 2. The exhaust oil passage function part of the oil plate has a total discharge oil passage area of Bs (cm ² ), and a compressor has a stroke volume of Vs.
2. The hermetic helium scroll compressor according to claim 1, wherein Zs = 0.25 to 0.35 when th (cm ³ / rev) and Zs = Bs / Vth. 3. The hermetic helium scroll compressor according to claim 1, wherein said oil plate has a semicircular structure having a collision plate function portion formed substantially only in a half circumference. 4. The exhaust oil passage function part of the oil plate has a total exhaust oil passage area set to be at least twice the total area of the stator outer peripheral passage. A scroll compressor for hermetically sealed helium as described in the above. 5. The oil suction pipe of claim 1, wherein the oil suction port of the oil suction pipe facing upwardly of the oil outlet is inclined with respect to a vertical axis direction of about 10 degrees. The hermetic helium scroll compressor according to any one of claims 1 to 4, wherein the hermetic scroll compressor is located at a position above the lower end portion.