JPH10274178A - Scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll compressor to be manufactured at a low cost, facilitate arrangement, provide given cooling operation of an electric motor, reduce the generation of noise and vibration, and perform quiet operation. SOLUTION: A cylindrical inner shell 14 is mounted by a support member 15 in a closed container 1, and a compressor 2 is arranged closer to the upper part of a closed container 1 in the inner shell 14. An electric motor 6 is provided to drive the compressor 2 closer to the lower part of the closed container 1 in the inner shell 14. Further, a suction pipe 12 is arranged at the closed container 1 and arranged in a position situated facing a suction hole 19 opened to the inner shell 14. This constitution effects inflow of most of sucked gas to the inner shell 14 through the suction hole 19 and the inner shell 14 is supported by a support member 15 to suppress the generation of noise and vibration. Further, mixture of lubrication oil in gas is prevented from occurring and further, there is no need to extend downward the suction pipe 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor used as a compressor for an air conditioner, a refrigerator and the like.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a longitudinal sectional view showing a conventional scroll compressor disclosed in Japanese Patent Publication No. In the drawing, reference numeral 1 denotes a sealed container having a cylindrical shape and a longitudinal shape, that is, a cylindrical axis line arranged in an upright state;
Is a compression mechanism, which is constituted by a fixed scroll 3 having plate-shaped spiral teeth and an orbiting scroll 4 provided near the upper part in the closed container 1. Reference numeral 5 denotes a bearing fixed in the closed container 1 for pivoting the orbiting scroll 4.

[0003] Reference numeral 6 denotes an electric motor provided on the anti-compression mechanism 2 side in the closed casing 1, that is, near the lower portion of the closed casing 1, and drives the orbiting scroll 4 by an output shaft 7. 8 is an oil pump provided at the end of the output shaft 7 on the side of the anti-compression mechanism 2; 8 are arranged in the immersion state.

[0004] Reference numeral 10 denotes a muffler formed between the inner surface of the end portion of the closed container 1 and the fixed scroll 3, that is, at the upper end of the closed container 1, reference numeral 11 denotes an inflow hole provided in the bearing body 5, and reference numeral 12 denotes a muffler provided in the closed container 1. Reference numeral 13 denotes a suction pipe opened toward the electric motor 6 and a discharge pipe provided in the closed casing 1 and opened to the muffler 10.

[0005] The conventional scroll compressor is constructed as described above, and cools the electric motor 6 while gas is sucked from the suction pipe 12 and flows from the lower part to the upper part in the closed vessel 1.
Then, the gas is taken into the compression mechanism 2 provided in the upper part of the closed container 1 and is compressed to be a high-temperature and high-pressure gas. Subsequently, the air is discharged from the discharge pipe 13 opened to the muffler 10 to the outside of the closed container 1.

FIG. 10 is a longitudinal sectional view showing another conventional scroll compressor. 9, the same reference numerals as those in FIG. 9 denote corresponding parts, and 14 denotes an inner shell which is cylindrical and is concentrically arranged in the closed container 1 and supported by the closed container 1 by a support member 15 to form a bearing body. 5, an electric motor 6 is provided. 16 is an oil drain cover provided on the lower surface of the bearing body 5, 17 is one end opened into the oil drain cover 16,
The other end is an oil drain pipe arranged close to the lubricating oil 9 surface.

[0007] In the scroll compressor constructed as shown in FIG. 10, the electric motor 6 is cooled while the gas is sucked from the suction pipe 12 and flows from the lower part to the upper part in the closed vessel 1. Then, the gas is taken into the compression mechanism 2 provided in the upper part of the closed container 1 and is compressed to be a high-temperature and high-pressure gas.
Subsequently, the air is discharged from the discharge pipe 13 opened to the muffler 10 to the outside of the closed container 1.

In a low-pressure hermetic compressor, the hermetic container 1
Is filled with the suction pressure atmosphere. The gas to be sucked enters the compressor 2 at a relatively low temperature, cools the electric motor 6 disposed in the suction pressure atmosphere, is taken into the compression mechanism 2 and is compressed, and is a high-temperature, high-pressure gas. And discharged out of the compressor.

[0009]

In the above-described conventional scroll compressor shown in FIG. 9, as the mounting position of the suction pipe 12 becomes closer to the upper part of the closed vessel 1, gas is directly compressed from the suction pipe 12. 2 easily. For this reason, it is difficult to form a gas passage near the electric motor 6. Therefore, the cooling of the electric motor 6 is hindered in the operation of the scroll compressor. Therefore, in order to cool the electric motor 6 efficiently, it is desirable to mount the suction pipe 12 as close to the lower part of the closed casing 1 as possible.

However, there is an adverse effect caused by mounting the suction pipe 12 as close to the lower part of the closed container 1 as possible. That is, since the lubricating oil 9 is stored in the lower part of the sealed container 1, if the lubricating oil 9 is entrained in the sucked gas, the oil rises and the electric input of the scroll compressor increases. Further, since the suction pipe 12 is extended toward the lower portion of the closed container 1, a piping space for extending the suction pipe 12 in a refrigeration unit or the like is required, and equipment costs are increased.

In the conventional scroll compressor shown in FIG. 10, since the entire periphery of the electric motor 6 is covered by the inner shell 14, the function of cooling the sucked gas by passing through the gap of the electric motor 6 is achieved. It is difficult to obtain. Further, since the suction pipe 12 is mounted near the upper part of the closed vessel 1, it is advantageous in the arrangement of the piping space of the scroll compressor in the refrigerating unit or the like. Is the compression mechanism 2 directly
It is taken in. Therefore, there is a problem that a required cooling effect of the electric motor 6 cannot be obtained.

The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a scroll compressor which can be easily installed and has a required electric motor cooling effect.

[0013]

SUMMARY OF THE INVENTION In a scroll compressor according to the present invention, a cylindrical inner shell mounted in a closed container by a support member, and a plate provided near an upper portion of the closed container in the inner shell. A fixed scroll and an orbiting scroll having a spiral spiral tooth, a bearing fixed to the inner shell and pivoting the orbiting scroll, and an electric motor provided near the lower portion of the closed container in the inner shell and driving the orbiting scroll. A compression mechanism comprising a fixed scroll and an orbiting scroll for inhaling gas in the lower part of the closed container; and a suction pipe provided in the closed container and opposed to a suction hole opened in the inner shell and communicating with the closed container. Are provided.

Further, in the scroll compressor according to the present invention, a fixed scroll having a cylindrical inner shell disposed in a closed container and plate-shaped spiral teeth provided near an upper portion of the closed container in the inner shell. And an orbiting scroll, and a bearing body fixed to the inner shell to pivot the orbiting scroll and to have an upper edge of the inner shell attached to a side surface,
An electric motor provided at a lower portion of the sealed container in the inner shell to drive the orbiting scroll, a compression mechanism comprising a fixed scroll and an orbiting scroll for sucking gas on the lower side in the sealed container, and provided in the sealed container. And a suction pipe disposed opposite to the suction hole opened in the inner shell and communicating with the closed container.

[0015] In the scroll compressor according to the present invention, the suction pipe is mounted so as to penetrate the sealed container and is fitted into a suction hole provided in the inner shell.

Further, in the scroll compressor according to the present invention, the suction pipe is mounted so as to penetrate the airtight container and is closely fitted to a suction hole provided in the inner shell.

Further, in the scroll compressor according to the present invention, the suction pipe is mounted so as to penetrate the airtight container, is fitted in a suction hole provided in the inner shell, and is disposed on a side surface of the suction pipe. And an auxiliary hole is provided at a position corresponding to between the closed container and the inner shell.

Further, in the scroll compressor according to the present invention, the suction pipe is mounted so as to penetrate the airtight container, is fitted into a suction hole provided in the inner shell, and is disposed on a side surface of the bearing body. An auxiliary flow path is provided between the inner shell and the inner shell.

Further, in the scroll compressor according to the present invention, the suction pipe is mounted so as to penetrate the airtight container, and is closely fitted to a suction hole provided in the inner shell by a seal material. .

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 and 2 are views showing an example of an embodiment of the present invention. FIG. 1 is a longitudinal sectional view, and FIG. 2 is an enlarged view of a suction pipe portion in FIG. In the figure, reference numeral 1 denotes a sealed container having a cylindrical shape and a longitudinal axis, that is, a cylindrical axis arranged in an upright state, and 2 denotes a compression mechanism, which has plate-shaped spiral teeth provided near an upper portion in the sealed container 1. Fixed scroll 3
And the orbiting scroll 4. Reference numeral 5 denotes a bearing provided in the closed container 1, and the orbiting scroll 4
To pivot.

Reference numeral 6 denotes an electric motor provided on the side of the anti-compression mechanism 2 in the closed container 1, that is, near the lower portion of the closed container 1, and drives the orbiting scroll 4 by the output shaft 7. Reference numeral 8 denotes an oil pump provided at the end of the output shaft 7 on the side of the anti-compression mechanism 2, and 9 denotes a lubricating oil, which is stored at the end of the output shaft 7 on the side of the anti-compression mechanism 2, that is, at the lower end. 8 are arranged in the immersion state.

Reference numeral 10 denotes a muffler formed between the inner surface of the end of the closed casing 1 and the fixed scroll 3, that is, at the upper end of the closed casing 1, reference numeral 11 denotes an inflow hole provided in the bearing 5, and reference Reference numeral 13 denotes a suction pipe opened toward the electric motor 6 and a discharge pipe provided in the closed casing 1 and opened to the muffler 10.

Reference numeral 14 denotes an inner shell which has a cylindrical shape, is arranged concentrically in the closed container 1 and is supported by the closed container 1 by a support member 15, and is provided with a bearing 5 and a motor 6. Reference numeral 16 denotes an oil drain cover provided on the lower surface of the bearing body 5, reference numeral 18 denotes an oil drain hole opened in the oil drain cover 16, and reference numeral 19 denotes a suction hole which is provided and opened in the inner shell 14 and faces the suction pipe 12. Is located in the position.

In the scroll compressor configured as described above, the lubricating oil 9 is provided with a head by the oil pump 8 and rises to lubricate the compression mechanism 2 and the like. After that, the oil stays in the oil drain cover 16, drops from the oil drain hole 18, and returns to the lower end portion in the closed container 1. In addition, the support member 15 is manufactured to have relatively low rigidity, and the operating noise and vibration generated by the compression mechanism 2, the bearing body 5, the electric motor 6, and the like are directly transmitted to the closed container 1, thereby causing unpleasant noise. Designed to prevent.

By providing such a support member 15, it is possible to obtain a scroll compressor in which noise and vibration can be suppressed to a minimum and noise and vibration can be reduced and a quiet operation can be performed. In addition, a suction hole 19 is provided and opened in the inner shell 14 at a position facing the suction pipe 12, and the suction hole 19 is arranged at substantially the same phase and the same height as the suction pipe 12.
Further, the upper edge of the inner shell 14 is fitted in close contact with the side surface of the bearing body 5 so that the gas flow hardly passes through this fitting portion.

The gas introduced from the suction pipe 12 into the closed vessel 1 flows in the direction of the arrow shown in FIG. That is, most of the gas flows into the inner shell 14 through the suction hole 19 of the inner shell 14, descends through the gap between the electric motors 6 in the inner shell 14, and moves toward the lower part of the inner shell 14. This gas flow is at a relatively low temperature and passes through the gap between the electric motors 6 while being accelerated, so that the electric motor 6 is efficiently cooled.

Further, since the compression mechanism 2 takes in a gas of a low atmosphere near the upper part of the sealed container 1, the space between the inner periphery of the sealed container 1 and the outer periphery of the inner shell 14 due to the negative pressure increases from below to above. An oncoming gas flow is formed. Therefore, the electric motor 6 is cooled and the inner shell 14 is cooled.
The gas flowing to the lower end changes its direction and rises in a cylindrical space formed by the inner periphery of the closed container 1 and the outer periphery of the inner shell 14.

The gas that has risen is taken into the compression mechanism 2 from the inflow hole 11 and is compressed to become a high-temperature, high-pressure gas, which is discharged from the discharge pipe 13 through the muffler 10 to the outside of the closed vessel 1. The lubricating oil 9 dropped from the oil drain hole 18
Falls directly on the motor 6, but descends through a gap in the motor 6 with the flow of gas. Then, when the flow velocity in the lower space of the inner shell 14 is reduced, the gas is separated from the gas and returns to the lower part in the sealed container 1. Therefore, the member of the oil drain pipe 17 in FIG. 10 described above can be omitted.

Further, since a gas flow is generated from above to below in the scroll compressor, the suction pipe 12 can be mounted at a relatively high position in the closed casing 1. Therefore, as in the scroll compressor shown in FIG. 9 described above, extending the suction pipe 12 to the lower portion of the closed vessel 1 requires piping space and increases equipment costs. Can be eliminated.

In short, in the embodiment of FIGS. 1 and 2, most of the gas flows into the inner shell 14 through the suction hole 19 of the inner shell 14. Then, the relatively low-temperature gas flows downward through the gap of the electric motor 6 to efficiently drive the electric motor 6.
Therefore, a scroll compressor that can operate with high reliability can be realized.

The inner shell 14 is supported by the support member 15.
The effect of suppressing noise and vibration and calming operation can be obtained by supporting. In addition, it is possible to prevent a problem caused by mixing the lubricating oil 9 into the gas, and it is possible to solve a problem of an increase in required space and cost due to extending the suction pipe 12 toward a lower portion of the closed container 1. .

Embodiment 2 FIG. FIG. 3 is a longitudinal sectional view showing an example of another embodiment of the present invention. In the drawings, the same reference numerals as those in FIGS. 1 and 2 denote corresponding parts, and reference numeral 14 denotes an inner shell which has a cylindrical shape, is concentrically arranged in the closed casing 1, and has an upper edge mounted on the bearing body 5. It is closely fitted to the side surface of the bearing body 5.

In the scroll compressor constructed as described above, the inner shell 14 is arranged concentrically in the closed casing 1 and the suction hole 19 is provided in the inner shell 14 so as to be open. It is arranged in the position to be.
Therefore, although detailed description is omitted, the cooling action of the electric motor 6 can be obtained in the embodiment of FIGS. 1 and 2 by the gas flowing downward through the gap in the embodiment of FIGS. Further, it is possible to obtain the effect of preventing troubles caused by the lubricating oil 9 being mixed into the gas and preventing troubles caused by extending the suction pipe 12 toward the lower portion of the closed casing 1.

Embodiment 3 FIG. 4 is also a diagram showing an example of another embodiment of the present invention, and is a diagram corresponding to FIG. 2 described above.
The scroll compressor is configured in the same manner as the scroll compressors of FIGS. 1 and 2 except for FIG. In the figure, the same reference numerals as those in FIG. 1 and FIG.
Reference numeral 20 denotes a suction pipe, which is mounted so as to penetrate the airtight container 1 and is fitted into a suction hole 19 provided in the inner shell 14.

In the scroll compressor configured as described above, the suction pipe 20 is disposed opposite the suction hole 19 of the inner shell 14, the inner shell 14 is supported by the support member 15, and the suction pipe 20 is It is arranged near the upper part of the closed container 1. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 and 2 can be obtained in the embodiment of FIG.

Further, a suction pipe 20 is mounted so as to penetrate through the sealed container 1 and is fitted into the suction hole 19 of the inner shell 14. For this reason, the gas is directly introduced into the inner shell 14, so that the gas flows into the inner shell 14 more efficiently and the gas flow rate flowing down the gap of the electric motor 6 is increased. Therefore, the action of cooling electric motor 6 more effectively can be obtained. It should be noted that the configuration of the embodiment of FIG.
This embodiment can be easily applied to the above-described embodiment, and an effect of more effectively cooling the electric motor 6 can be obtained.

Embodiment 4 FIG. FIG. 5 also shows an example of another embodiment of the present invention, and corresponds to FIG. 2 described above.
In addition, the scroll compressor is configured similarly to the above-described scroll compressors of FIGS. 1 and 2 except for FIG. In the figure, the same reference numerals as those in FIG. 1 and FIG.
Reference numeral 20 denotes a suction pipe, which is mounted so as to penetrate the airtight container 1 and is fitted into a suction hole 19 provided in the inner shell 14. Reference numeral 21 denotes an auxiliary pipe which is fitted into the suction hole 19 and press-fitted into the suction pipe 20.

In the scroll compressor configured as described above, the suction pipe 20 is disposed opposite the suction hole 19 of the inner shell 14, the inner shell 14 is supported by the support member 15, and the suction pipe 20 is It is arranged near the upper part of the closed container 1. Therefore, although the detailed description is omitted, the same operation as the embodiment of FIGS. 1 and 2 can be obtained in the embodiment of FIG.

A suction pipe 20 is mounted so as to penetrate the airtight container 1 and is fitted into the suction hole 19 of the inner shell 14 through an auxiliary pipe 21 so as to be tightly fitted thereto. For this reason,
Since the gas is directly introduced into the inner shell 14, the gas flows into the inner shell 14 more efficiently, and the gas flow rate flowing down the gap of the electric motor 6 is increased. Therefore, an effect of more effectively cooling electric motor 6 can be obtained. Note that the configuration of the embodiment of FIG. 5 can be easily applied to the above-described embodiment of FIG. 3, and an effect of more effectively cooling the electric motor 6 can be obtained.

Embodiment 5 FIG. 6 also shows an example of another embodiment of the present invention, and corresponds to FIG. 2 described above.
In addition, the scroll compressor is configured similarly to the above-described scroll compressor of FIGS. 1 and 2 except for FIG. In the figure, the same reference numerals as those in FIG. 1 and FIG.
Reference numeral 20 denotes a suction pipe, which is mounted so as to penetrate the airtight container 1 and is fitted into a suction hole 19 provided in the inner shell 14. Reference numeral 21 denotes an auxiliary pipe which is fitted into the suction hole 19 and press-fitted into the suction pipe 20. Reference numeral 22 denotes a sealing material interposed between the auxiliary pipe 21 and the suction pipe 20.

In the scroll compressor configured as described above, the suction pipe 20 is disposed opposite the suction hole 19 of the inner shell 14, the inner shell 14 is supported by the support member 15, and the suction pipe 20 is It is arranged near the upper part of the closed container 1. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 and 2 can be obtained in the embodiment of FIG.

A suction pipe 20 is fitted through the closed casing 1 so as to fit into the suction hole 19 of the inner shell 14 via the auxiliary pipe 21, and is provided between the auxiliary pipe 21 and the suction pipe 20. A sealing material 22 is provided and sealed. For this reason, the gas is directly introduced into the inner shell 14, so that the gas flows into the inner shell 14 more efficiently and the gas flow rate flowing down the gap of the electric motor 6 is increased.

Therefore, the function of more effectively cooling the electric motor 6 can be obtained. The configuration of the embodiment of FIG. 6 can be easily applied to the embodiment of FIG.
The effect of cooling electric motor 6 can be obtained more effectively.

Embodiment 6 FIG. FIG. 7 is also a diagram showing an example of another embodiment of the present invention, and is a diagram corresponding to FIG. 2 described above.
In addition, the scroll compressor other than FIG. 7 is configured similarly to the scroll compressor of FIGS. 1 and 2 described above. In the figure, the same reference numerals as those in FIG. 1 and FIG.
Reference numeral 23 denotes an auxiliary hole provided in the suction pipe 20, which is disposed on the upper surface and the lower surface of the suction pipe 20, respectively, and is disposed at a position corresponding to between the closed container 1 and the inner shell 14.

In the scroll compressor configured as described above, the suction pipe 20 is disposed to face the suction hole 19 of the inner shell 14, the inner shell 14 is supported by the support member 15, and the suction pipe 20 is It is arranged near the upper part of the closed container 1. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 and 2 can be obtained in the embodiment of FIG.

Also, by appropriately setting the position, number, opening area, and opening direction of the auxiliary holes 23 provided in the suction pipe 20, the amount of gas guided to the inner shell 14 and the compression mechanism 2
The amount of gas directly led to the gas can be appropriately distributed. That is, except for the amount of gas necessary and sufficient for cooling the electric motor 6,
The form of the auxiliary hole 23 is set so as to be guided directly to the compression mechanism 2 via the auxiliary hole 23. This makes it possible to obtain a scroll compressor in which the volume efficiency of the compression mechanism 2 is not impaired and the performance of the scroll compressor is small.

The gas to be inhaled receives heat from the electric motor 6 and its specific volume increases. When the specific volume is increased, the volume efficiency of the gas taken in by the compression mechanism 2 is deteriorated, which causes a decrease in performance. Therefore, it is necessary to control the cooling of the electric motor 6 by the sucked gas within a range that does not hinder the operation of the scroll compressor.
For this reason, it is necessary to consider that the performance of the scroll compressor is not excessively impaired. Further, the configuration of the embodiment of FIG. 7 can be easily applied to the above-described embodiment of FIG. 3, and an effect of more effectively cooling the electric motor 6 can be obtained.

Embodiment 7 FIG. FIG. 8 is also a diagram showing an example of another embodiment of the present invention, and is a diagram corresponding to FIG. 2 described above.
Note that the scroll compressor is configured in the same manner as the scroll compressor of FIGS. 1 and 2 except for FIG. In the figure, the same reference numerals as those in FIG. 1 and FIG.
Reference numeral 24 denotes an auxiliary flow path formed between the side surface of the bearing member 5 and the inner shell 14 by cutting out the side surface of the bearing member 5.

In the scroll compressor configured as described above, the suction pipe 20 is disposed to face the suction hole 19 of the inner shell 14, the inner shell 14 is supported by the support member 15, and the suction pipe 20 is It is arranged near the upper part of the closed container 1. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 and 2 can be obtained in the embodiment of FIG.

Further, since the auxiliary flow path 24 is provided, by appropriately setting the opening area of the auxiliary flow path 24, the amount of gas guided to the inner shell 14 and the amount of gas directly guided to the compression mechanism 2 can be adjusted appropriately. Can be distributed. Therefore,
Although detailed description is omitted, the same operation as that of the above-described embodiment of FIG. 7 can be obtained in the embodiment of FIG. Also,
The configuration of the embodiment of FIG. 8 can be easily applied to the above-described embodiment of FIG. 3, and the effect of more effectively cooling electric motor 6 can be obtained.

[0051]

As described above, the present invention has a cylindrical inner shell mounted in a closed container by a support member and a plate-shaped spiral tooth provided near the upper portion of the closed container in the inner shell. A fixed scroll and an orbiting scroll, a bearing fixed to the inner shell and pivoting the orbiting scroll, an electric motor provided near the lower portion of the closed container in the inner shell to drive the orbiting scroll, a fixed scroll and an orbiting scroll, Composed of a dynamic scroll and a compression mechanism for sucking gas in the lower part of the closed container, and a suction pipe provided in the closed container and opposed to a suction hole opened in the inner shell and connected to the closed container. It is.

As a result, most of the gas to be sucked flows into the inner shell through the suction hole of the inner shell, and relatively low-temperature gas flows downward through the gap between the motors, thereby efficiently cooling the motor. This has the effect of improving driving reliability. In addition, since the inner shell is supported by the support member, there is an effect that noise and vibration are suppressed and the operation is calmed. Further, there is an effect of preventing a problem caused by mixing lubricating oil into gas. Furthermore, the required space is increased by extending the suction pipe near the bottom of the closed container,
This has the effect of eliminating the problem of increased cost.

As described above, the present invention also relates to a fixed scroll having a cylindrical inner shell disposed in a closed container, and a plate-shaped spiral tooth provided near the upper portion of the closed container in the inner shell. An orbiting scroll, a bearing fixed to the inner shell and pivoting the orbiting scroll and having an upper edge of the inner shell attached to the side surface, and an orbiting scroll provided near the lower portion of the sealed container in the inner shell , A compression mechanism comprising a fixed scroll and an orbiting scroll for sucking gas in the lower part of the closed container, and a closed container provided in the closed container and opposed to a suction hole opened in the inner shell. And a suction pipe communicating with the suction pipe.

As a result, most of the gas to be sucked flows into the inner shell through the suction hole of the inner shell, and relatively low-temperature gas flows downward through the gap between the motors, thereby efficiently cooling the motor. This has the effect of improving driving reliability. Further, there is an effect of preventing a problem caused by mixing lubricating oil into gas. Further, there is an effect of eliminating a problem of an increase in required space and an increase in cost due to extension of the suction pipe toward a lower portion of the closed container.

Further, as described above, in the present invention, the suction pipe is mounted so as to penetrate the airtight container, and is fitted into the suction hole provided in the inner shell.

As a result, the gas is directly introduced into the inner shell, so that the gas flows into the inner shell more efficiently, and the flow rate of the relatively low-temperature gas flowing downward through the gap of the motor increases. Therefore, the electric motor can be cooled more effectively, and there is an effect of improving operation reliability.
Further, there is an effect of preventing a problem caused by mixing lubricating oil into gas. Further, there is an effect of eliminating a problem of an increase in required space and an increase in cost due to extension of the suction pipe toward a lower portion of the closed container.

Further, as described above, the present invention is configured such that the suction pipe is mounted so as to penetrate the sealed container, and is fitted to the suction hole formed in the inner shell in close contact therewith.

As a result, the gas is more directly guided into the inner shell, so that the gas flows into the inner shell more efficiently, and the flow rate of the relatively low-temperature gas flowing downward through the gap of the motor is increased. . Therefore, the electric motor can be cooled more effectively, and there is an effect of improving operation reliability. Further, there is an effect of preventing a problem caused by mixing lubricating oil into gas. Further, there is an effect of eliminating a problem of an increase in required space and an increase in cost due to extension of the suction pipe toward a lower portion of the closed container.

As described above, according to the present invention, the suction pipe is mounted so as to penetrate the sealed container, is fitted into the suction hole provided in the inner shell, and is provided on the side surface of the suction pipe. A hole is provided and arranged at a position corresponding to between the closed container and the inner shell.

As a result, the gas is guided directly into the inner shell, so that the gas flows into the inner shell more efficiently, and the flow rate of the relatively low-temperature gas flowing downward through the gap of the motor is increased. Therefore, the electric motor can be cooled more effectively, and there is an effect of improving operation reliability.
Further, there is an effect of preventing a problem caused by mixing lubricating oil into gas. Further, there is an effect of eliminating a problem of an increase in required space and an increase in cost due to extension of the suction pipe toward a lower portion of the closed container.

By appropriately setting the position, number, opening area, and opening direction of the auxiliary holes provided in the suction pipe, the gas amount guided to the inner shell and the gas amount directly guided to the compression mechanism are appropriately distributed. be able to. That is, the form of the auxiliary hole is set so as to directly lead to the compression mechanism via the auxiliary hole except for the amount of gas necessary and sufficient for cooling the electric motor. As a result, there is an effect that a scroll compressor with less deterioration in performance without impairing the volume efficiency of the compression mechanism is obtained.

As described above, according to the present invention, the suction pipe is inserted through the airtight container, is fitted in the suction hole provided in the inner shell, and is disposed between the suction pipe and the side face of the bearing body. An auxiliary flow path is provided between the shells.

As a result, the gas is introduced directly into the inner shell, so that the gas flows into the inner shell more efficiently, and the flow rate of the relatively low-temperature gas flowing downward through the gap of the motor increases. Therefore, the electric motor can be cooled more effectively, and there is an effect of improving operation reliability.
Further, there is an effect of preventing a problem caused by mixing lubricating oil into gas. Further, there is an effect of eliminating a problem of an increase in required space and an increase in cost due to extension of the suction pipe toward a lower portion of the closed container.

By appropriately setting the position, the number, the opening area, and the opening direction of the auxiliary flow paths, the amount of gas guided to the inner shell and the amount of gas guided directly to the compression mechanism can be appropriately distributed. That is, the configuration of the auxiliary flow path is set so that the gas is directly guided to the compression mechanism via the auxiliary flow path except for the amount of gas necessary and sufficient for cooling the electric motor. As a result, there is an effect that a scroll compressor with less deterioration in performance without impairing the volume efficiency of the compression mechanism is obtained.

Further, as described above, the present invention is configured such that the suction pipe is inserted through the airtight container, and is fitted in the suction hole provided in the inner shell with a sealing material. .

As a result, the suction pipe is placed in close contact with the suction hole of the inner shell by the seal material. Because of this, the gas is further directly guided into the inner shell,
The gas flows into the inner shell more efficiently, increasing the flow rate of the relatively cool gas flowing down through the gap in the motor. Therefore, the electric motor can be cooled more effectively, and there is an effect of improving operation reliability. Further, there is an effect of preventing a problem caused by mixing lubricating oil into gas. Further, there is an effect of eliminating a problem of an increase in required space and an increase in cost due to extension of the suction pipe toward a lower portion of the closed container.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is an enlarged view of a suction pipe portion in FIG. 1;

FIG. 3 is a longitudinal sectional view showing Embodiment 2 of the present invention.

FIG. 4 is a diagram corresponding to FIG. 2 showing the third embodiment of the present invention.

FIG. 5 is a diagram corresponding to FIG. 2 showing the fourth embodiment of the present invention.

FIG. 6 is a diagram corresponding to FIG. 2 showing the fifth embodiment of the present invention.

FIG. 7 is a view corresponding to FIG. 2 showing the sixth embodiment of the present invention.

FIG. 8 is a diagram corresponding to FIG. 2 showing the seventh embodiment of the present invention.

FIG. 9 is a longitudinal sectional view showing a conventional scroll compressor.

FIG. 10 is a longitudinal sectional view showing another conventional scroll compressor.

[Explanation of symbols]

1 closed container, 2 compression mechanism, 3 fixed scroll, 4
Orbiting scroll, 5-bearing body, 6 motor, 12 suction pipe, 14 inner shell, 15 support member, 19 suction hole, 20 suction pipe, 22 seal material, 23 auxiliary hole, 24 auxiliary flow path.

Continued on the front page (72) Yoshihide Ogawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Fumiaki Sano 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric (72) Inventor Shinji Nakajima 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation

Claims (7)

[Claims] 1. A fixed scroll and an orbiting scroll having a cylindrical inner shell mounted in a closed container by a support member and having plate-shaped spiral teeth provided near an upper portion of the closed container in the inner shell. A bearing body fixed to the inner shell and pivotally supporting the orbiting scroll; an electric motor provided in the inner shell near the lower portion of the closed container to drive the orbiting scroll; and the fixed scroll and the orbiting scroll. A compression mechanism for sucking a gas on the lower side in the closed container, and a suction pipe provided in the closed container and opposed to a suction hole opened in the inner shell and communicated with the closed container. Scroll compressor. 2. A fixed scroll and an orbiting scroll having a cylindrical inner shell disposed in a closed container, a plate-shaped spiral tooth provided in an upper portion of the closed container in the inner shell, and the inner shell. A bearing body having the upper edge of the inner shell mounted on the side surface while being fixed to the oscillating scroll, and driving the oscillating scroll provided near the lower portion of the closed container in the inner shell. An electric motor, a compression mechanism comprising the fixed scroll and the orbiting scroll, and a suction mechanism for sucking a gas on a lower side in the closed container;
A scroll compressor comprising: a suction pipe provided in the closed container, opposed to a suction hole opened in the inner shell, and connected to the closed container. 3. The suction pipe according to claim 1, wherein the suction pipe is mounted so as to penetrate the airtight container, and is fitted into a suction hole provided in the inner shell. 2. The scroll compressor according to item 1. 4. The suction pipe according to claim 1, wherein the suction pipe is mounted so as to penetrate the airtight container and is closely fitted to a suction hole provided in the inner shell. Scroll compressor according to one. 5. A suction pipe is mounted so as to penetrate through the closed container, is fitted into a suction hole provided in the inner shell, and is provided on a side surface to correspond between the closed container and the inner shell. 3. The scroll compressor according to claim 1, wherein the suction pipe has an auxiliary hole arranged at a position. 6. A suction pipe is mounted so as to penetrate a closed container, is fitted in a suction hole provided in an inner shell, and is provided with an auxiliary flow path between a side surface of the bearing body and the inner shell. The scroll compressor according to any one of claims 1 and 2, wherein: 7. The suction pipe is mounted so as to penetrate through a closed container, and is fitted in a suction hole provided in an inner shell by a sealing material.
The scroll compressor as described.