JP2001050162A - Closed type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a closed type compressor in simple structure, capable of securing lubricating oil holding quantity by separating oil from refrigerant gas containing lubricating oil and furnished with a motor cooling function. SOLUTION: A scroll compressor has a closed housing, a compressing mechanism stored in this closed type housing and a separation plate 112 set in the closed housing. This separation plate 112 separates refrigerant gas containing lubricating oil flowing in from a suction pipe into lubricating oil and refrigerant gas and has an open part to deflect a flow in the motor rotating direction. This open part is constituted of an inclined slit 113.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor, such as a scroll compressor, for separating lubricating oil contained in suction gas and cooling a motor in a hermetically sealed housing.

[0002]

2. Description of the Related Art Scroll compressors are increasingly used because they can operate with high efficiency and low noise as compressors for air conditioning and refrigeration. As shown in FIG. 8, for example, a conventional scroll compressor includes a body housing 4, a scroll-type compression mechanism C, and an electric motor M provided below the frame housing 41, that is, at a lower portion inside the body housing 4. The rotary shaft 61 of the electric motor M is connected to a lower portion of the scroll-type compression mechanism C.

In the scroll type compression mechanism C, a pair of scrolls 31 and 32 each composed of an end plate and a spiral wrap erected on its inner surface are meshed with each other, and one of the scrolls (orbiting scroll 32) is Rotating shaft 61
And orbital motion relative to the other scroll (fixed scroll 31) fixed to the frame 41 by the electric motor M via the. The Oldham ring 9 that allows the orbiting scroll 32 to revolve and rotate with respect to the fixed scroll 31, but prevents its rotation, the frame 41 to which the fixed scroll 31 is fixed, the main bearing 71 that supports the rotating shaft 61, And a thrust bearing 73 for supporting the orbiting scroll 32.
The rotary shaft 61 of the electric motor M has an eccentric pin 62 eccentric from the axis by a predetermined amount, and is provided at the upper end in a protruding shape. The eccentric pin 62 is inserted into a cylindrical boss 63 erected on the same axis as the lower part of the orbiting scroll 32, and when the rotating shaft 61 rotates, the orbiting scroll 32 is inserted through the eccentric pin 62. The fixed scroll 31 rotates eccentrically around the axis. While the plurality of compression chambers 7, which are closed spaces, move from the outer suction port to the central discharge port 6, the volume gradually decreases, and compression work is performed.

Here, on the upper part of the fixed scroll 31,
A discharge cover 3 serving as a partition wall is fixed in an airtight state, and is provided so as to partition the body housing 4 up and down. In the figure, the discharge valve 5 is installed at the outlet of the discharge port 6, and a discharge chamber 22 serving as a high-pressure chamber is formed above the body housing 4. The discharge chamber 22 is connected to the discharge pipe 1, and the compressed refrigerant gas is discharged from the discharge pipe 1, and returns to the inside of the compressor via the suction pipe 82 after circulating through the refrigerant circuit.

At this time, the lubricating oil is entrained in the flow of the refrigerant gas in the body housing 4 as described below. The lubricating oil 81 stored in the bottom of the body housing 4 is sucked up from the oil suction port 51 by the pump with the rotation of the rotating shaft 61, passes through the oil supply hole 52, and passes through the sub bearing 72, the main bearing 71, the boss 63, and the like. After lubrication, it flows out of the clearance, is discharged to the bottom of the body housing 4, and also flows out from below the sub bearing 72. On the other hand, the refrigerant gas flows in from the suction pipe 82, enters the body housing 4, cools the electric motor M, and is sucked from the suction passage between the two scrolls 31 and 32, and is fixed to the fixed scroll 31 of the scroll type compression mechanism C. It is sucked into the compression chamber 7 formed by the engagement of the orbiting scroll 32 with the orbiting scroll 32. Then, as the volume of the compression chamber 7 decreases due to the revolving orbiting motion of the orbiting scroll 32 along with the above-described compression stroke, the compression chamber 7 is compressed and reaches the central portion while being discharged to the discharge chamber 22 and passes through the discharge pipe 1 to the outside of the compressor. And then returns to the suction pipe 82 of the compressor after circulating through the refrigerant circuit.

In the conventional hermetic scroll compressor, the refrigerant gas containing a large amount of lubricating oil in the body housing 4 is sucked into the scroll type compression mechanism C and discharged to the outside through the discharge pipe 1. , Body housing 4
The amount of the lubricating oil 81 at the bottom inside is reduced. Therefore, lubricating oil cannot be sucked through the oil suction port 51, and it is assumed that each sliding portion has poor lubrication and seizure may occur. For this reason, oil separation of the refrigerant gas containing the lubricating oil flowing from the suction pipe 82 is regarded as an important point for ensuring the reliability of the compressor. Conventionally, for example, the following proposals have been made.

First, the first proposal (Japanese Patent Publication No. Hei 3-12680)
As shown in FIG. 9, the rotor 9 of the motor M
1 and the air gap 94 between the stator 92 and the frame 4
A passage leading to the suction ports of the scrolls 31 and 32 is formed through a clearance between the first housing 1 and the body housing 4. Then, the coil end 93 of the stator 92 is mounted on the frame 41.
And a collision wall 101 for integrally colliding the suction gas passing through the base of the coil end 93,
A separation chamber 102 is formed inside the collision wall 101. On the other hand, the opening 103 in the collision wall 101 is located at a position distant from the portion of the coil end 93 facing the base outer periphery.
Is provided.

In such a structure, the gas containing a large amount of lubricating oil passing through the air gap 94 of the motor M is supplied to the separation chamber 1.
02, the flow is changed, and the flow velocity is increased by the centrifugal force of the rotor 91 to collide with the collision wall 101. This allows
The gas containing a large amount of lubricating oil collides with the collision wall 101 at a high speed, so that the oil separating effect can be improved.

Next, a second proposal (Japanese Patent Publication No. 7-72541)
As shown in FIG. 10, a baffle plate 111 (see FIG. 11) is provided at a suction port of a suction pipe 82 attached to the body housing 4 where the refrigerant gas returns to the compressor again after circulating through the refrigerant circuit. ) Is provided.

In such a structure, the refrigerant gas containing the lubricating oil discharged to the outside of the compressor through the discharge pipe 1 and returned to the suction pipe 82 of the compressor after circulating through the refrigerant circuit is transferred to the baffle plate 111. collide. The oil separated by this is
It is discharged from the lower part of the baffle plate 111 to the bottom of the body housing 4. On the other hand, the refrigerant gas from which the oil has been separated is mainly sucked between the scrolls 31 and 32 from the suction passage above the baffle plate 111.

The refrigerant gas containing a large amount of lubricating oil returned to the suction pipe 82 of the compressor as described above is supplied at high speed to the baffle plate 1.
Since the oil collides with 11, the oil can be efficiently separated. Since the separated oil is discharged from the lower part of the baffle plate 111 to the bottom of the body housing 4, the housing 4 which is often generated in the conventional hermetic scroll compressor described above.
The amount of the lubricating oil 81 at the inner bottom is reduced, so that seizure due to poor lubrication of each sliding portion due to inability to inhale lubricating oil from the oil suction port 51 can be avoided, and the reliability of the compressor can be ensured. In addition, since the refrigerant gas separated from the oil is mainly sucked between the scrolls 31 and 32 from the suction passage above the baffle plate 111, the oil content of the refrigerant gas discharged to the refrigerant circuit can be reduced, There is also an effect that the heat exchange efficiency in the circuit can be improved.

[0012]

As in the first and second proposals described above, a proposal for avoiding seizure due to poor lubrication of each sliding portion by separating the refrigerant gas containing the sucked lubricating oil into oil. However, each has the following problems.

In the case of the first proposal, as shown in FIG. 9, the gas containing a large amount of lubricating oil passing through the air gap 94 of the motor M enters the separation chamber 102 to change the flow, and The flow velocity is increased by centrifugal force and the collision wall 101 is increased.
Therefore, the oil separation effect can be expected. However, the air gap 94 between the rotor 91 and the stator 92 of the motor M
To form a passage leading to the suction ports of the scrolls 31 and 32 through the clearance between the frame 41 and the body housing 4 and to cover the outer periphery of the coil end 93 of the stator 92 in the frame 41, so that heat generated by motor heat is radiated. Hateful. Although the motor can be cooled at a flow rate at a location where the refrigerant gas flows sufficiently, heat dissipation is significantly impaired at a location where the flow is likely to stay, which may result in motor burnout. In addition, since the structure of the frame 41 itself becomes complicated, its manufacture becomes difficult,
There is also the disadvantage that the weight increases.

In the case of the second proposal, as shown in FIG. 10, the suction pipe 8 attached to the body housing 4 in which the refrigerant gas returns to the compressor after circulating through the refrigerant circuit.
2 is provided with a baffle plate 111 at the suction port, whereby the refrigerant gas containing the lubricating oil collides with the above-mentioned baffle plate 111, and there is an effect that the oil can be efficiently separated.
To discharge from the lower part of the body housing 4 to the bottom part of the body housing 4 and to allow oil-separated refrigerant gas to be sucked between the two scrolls 31 and 32 from the suction passage at the upper part of the baffle plate 111, so that seizure due to poor lubrication of each sliding part is avoided. Can,
In addition to ensuring the reliability of the compressor, the oil content of the refrigerant gas discharged to the refrigerant circuit can be reduced, and the heat exchange efficiency in the refrigerant circuit can be improved. However, the refrigerant gas flowing from the suction port of the suction pipe 82 mainly flows from the suction passages above the baffle plate 111 to the two scrolls 31 and 32.
Since the gas is sucked in between, the motor cooling effect by the sucked gas is hardly obtained, and as in the case of the first proposal, there is a possibility that the motor may be burned out. Therefore, a structure for separately cooling the motor is added. Required, complicating the structure of the compressor.

The present invention has been made in view of such a situation, and has a simpler structure, which separates a refrigerant gas containing a lubricating oil into oil to secure the amount of lubricating oil held in a compressor and to achieve each sliding operation. An object of the present invention is to provide a hermetic compressor that avoids seizure due to poor lubrication of a part and realizes compatibility with motor cooling.

[0016]

SUMMARY OF THE INVENTION A hermetic compressor according to the present invention has been made to solve such a problem, and has a compressor having a hermetic housing and a compression element housed in the hermetic housing. In the machine, a separating plate for separating the refrigerant gas containing the lubricating oil flowing from the suction pipe into the lubricating oil and the refrigerant gas is installed in the closed housing, and the separating plate is provided with an opening for deflecting the flow in the motor rotation direction. And a motor cooling function using refrigerant gas.

According to the present invention, the refrigerant gas containing the lubricating oil flowing from the suction pipe collides with the separating plate to separate the lubricating oil and guide the lubricating oil downward.
The amount of lubricating oil discharged from the discharge pipe of the compressor to the refrigerant circuit can be reduced. On the other hand, since the separation plate is provided with an opening for deflecting the flow in the motor rotation direction, the refrigerant gas forms a swirl flow accelerated in the motor rotation direction and efficiently circulates around the motor.

According to the present invention, an opening for deflecting a flow in a motor rotation direction provided on a separation plate for separating a refrigerant gas containing a lubricating oil into a lubricating oil and a refrigerant gas is constituted by an inclined slit shape. It is preferable that a motor cooling function is provided by the refrigerant gas.

According to this structure, the refrigerant gas containing the lubricating oil flowing from the suction pipe collides with the separating plate to separate the lubricating oil and to guide the lubricating oil downward. As an open part that reduces the amount of lubricating oil discharged to the
Specifically, by taking a slit shape inclined in the motor rotation direction, the refrigerant gas forms a swirling flow accelerated in the motor rotation direction, and efficiently circulates around the motor.

According to the present invention, there is provided a motor rotating apparatus comprising: a separating plate for separating a refrigerant gas containing a lubricating oil into a lubricating oil and a refrigerant gas; It is preferable that it is constituted by a number of openings in the direction, and has a motor cooling function by the refrigerant gas.

According to this structure, the refrigerant gas containing the lubricating oil flowing from the suction pipe collides with the separating plate to separate the lubricating oil and to guide the lubricating oil downward. As an open part that reduces the amount of lubricating oil discharged to the
By forming a large number of openings in the zigzag form in the motor rotation direction, the refrigerant gas forms a swirling flow accelerated in the motor rotation direction and efficiently circulates around the motor.

The present invention also provides a separating plate for separating a refrigerant gas containing a lubricating oil into a lubricating oil and a refrigerant gas, having a large opening in the motor rotation direction, deflecting the flow in the motor rotation direction, and Preferably, the gas has a motor cooling function.

With this configuration, the refrigerant gas containing the lubricating oil flowing from the suction pipe collides with the separating plate to separate the lubricating oil and guide the lubricating oil downward. As an open part that reduces the amount of lubricating oil discharged to the
By increasing the opening in the motor rotation direction, the refrigerant gas forms a swirling flow accelerated in the motor rotation direction and efficiently circulates around the motor.

The present invention also has a motor cooling function by separating the refrigerant gas containing lubricating oil flowing from the suction pipe into lubricating oil and refrigerant gas and deflecting the flow in the motor rotation direction. It is preferable to improve the oil separation effect by using a mesh cover in combination with the separated plate.

With this configuration, the refrigerant gas containing the lubricating oil flowing from the suction pipe collides with the separating plate, and the separating plate is used in combination with a mesh cover to improve the oil separating effect and lubricate downward. By efficiently guiding the oil, the amount of lubricating oil discharged from the discharge pipe of the compressor to the refrigerant circuit is reduced. Also, as described above, the refrigerant gas forms a swirl flow accelerated in the motor rotation direction by deflecting the flow to the separation plate in the motor rotation direction, and efficiently circulates around the motor.

The present invention is suitable when the suction pipe is located near the motor.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a hermetic compressor according to the present invention will be described with reference to the drawings. 1 and 2 are main parts of the hermetic compressor according to the first embodiment,
3 and 4 are main parts of the hermetic compressor according to the second embodiment, FIGS. 5 and 6 are main parts of a hermetic compressor according to the third embodiment, and FIG. 7 is a fourth embodiment. The main part of the hermetic-type compressor concerning a form is each shown. The basic structure of the hermetic compressor according to each embodiment is the same as that of the conventional compressor, and a detailed description thereof will be omitted.

First, a first embodiment will be described with reference to FIGS. FIG. 1 is a perspective view of a main part of a scroll compressor to which the present invention is applied, and FIG. 2 is a sectional view thereof. The scroll compressor has a sealed housing 4 in which a scroll-type compression mechanism C as a compression element is housed (see FIG. 8). Further, a separation plate 112 is provided in the closed housing 4 near the suction pipe 82 (see FIG. 8). This separation plate 11
Numeral 2 is for separating the refrigerant gas containing the lubricating oil flowing from the suction pipe 82 into the lubricating oil and the refrigerant gas. FIG.
Alternatively, as shown in FIG. 2, the separation plate 112 has a U-shaped cross section with a flange at both ends, and has an opening for deflecting the flow in the motor rotation direction A. The opening is a slit 113 formed of an opening and a flange. The flange is provided inside the closed housing 4 and is inclined in the motor rotation direction A. The opening extends in the motor rotation direction A. It is formed to exist. As described above, in the present embodiment, the open portion that deflects the flow in the motor rotation direction A is provided on the separation plate 112 that separates the refrigerant gas containing the lubricating oil flowing from the suction pipe 82 into the lubricating oil and the refrigerant gas. To
It is constituted by an inclined slit 113.

Refrigerant gas containing the lubricating oil flowing from the suction pipe 82 collides with the separating plate 112, whereby the lubricating oil is separated, and the lubricating oil in the lower portion of the body housing 4 is removed from the gap between the motor M and the body housing 4. Lead to reservoir 81. Thereby, the amount of lubricating oil discharged from the discharge pipe 1 of the compressor to the refrigerant circuit is reduced. On the other hand, by providing an opening for deflecting the flow in the motor rotation direction A, that is, a slit 113 inclined in the motor rotation direction A on the separation plate 112,
The refrigerant gas forms a swirling flow accelerated in the motor rotation direction A, and efficiently circulates around the motor M. In addition, since the slit 113 is inclined in the motor rotation direction A, it is possible to prevent the airflow due to the rotation of the motor from blowing into the suction pipe 82 from the opening.

By the oil separating action of the separating plate 112,
Since the lubricating oil is guided to the lubricating oil reservoir 81 in the lower part of the body housing 4, a decrease in the amount of lubricating oil in the compressor can be prevented, and each sliding portion can be sufficiently lubricated, which has the effect of preventing seizure. Further, by the slit 113 provided in the separation plate 112 and inclined in the motor rotation direction A, the refrigerant gas flowing from the suction pipe 82 forms a swirling flow accelerated in the motor rotation direction A, and efficiently surrounds the motor M. Circulates, has the effect of cooling the motor M, and prevents the motor temperature from rising. Although the embodiment related to the scroll compressor is described here, the present invention can be similarly applied to other compression formats, and the same applies to other embodiments described below.

Next, a second embodiment will be described with reference to FIGS. FIG. 3 is a perspective view of a main part of a scroll compressor to which the present invention is applied, and FIG. 4 is a sectional view thereof. The scroll compressor has a sealed housing 4 in which a scroll-type compression mechanism C as a compression element is housed (see FIG. 8). In addition, a separation plate 114 is provided in the closed housing 4 near the suction pipe 82 (see FIG. 8). This separation plate 11
Reference numeral 4 is for separating the refrigerant gas containing the lubricating oil flowing from the suction pipe 82 into the lubricating oil and the refrigerant gas. FIG.
Alternatively, as shown in FIG. 4, the separation plate 114 has a U-shaped cross section with an upper end with a flange at both ends, and has an opening for deflecting the flow in the motor rotation direction A. The open portion includes a large number of openings (openings) 115 in the motor rotation direction A arranged in a staggered manner. Each opening 115 is provided inside the closed housing 4, is inclined in the motor rotation direction A, and opens in the motor rotation direction A. As described above, in the present embodiment, the opening that deflects the flow in the motor rotation direction A is provided on the separation plate 114 that separates the refrigerant gas containing the lubricating oil flowing from the suction pipe 82 into the lubricating oil and the refrigerant gas. Are formed by a number of openings 115 in the motor rotation direction A arranged in a staggered manner.

Refrigerant gas containing lubricating oil flowing from the suction pipe 82 collides with the separating plate 114, whereby the lubricating oil is separated, and the lubricating oil at the lower part of the body housing 4 is removed from the gap between the motor M and the body housing 4. Lead to reservoir 81. Thereby, the amount of lubricating oil discharged from the discharge pipe 1 of the compressor to the refrigerant circuit is reduced. On the other hand, the refrigerant gas was accelerated in the motor rotation direction A by providing the separation plate 114 with open portions for deflecting the flow in the motor rotation direction A, that is, a large number of openings 115 in the motor rotation direction A arranged in a staggered manner. A swirling flow is formed and efficiently circulates around the motor M.

By the oil separating action of the separating plate 114,
Since the lubricating oil is guided to the lubricating oil reservoir 81 in the lower part of the body housing 4, a decrease in the amount of lubricating oil in the compressor can be prevented, and each sliding portion can be sufficiently lubricated, which has the effect of preventing seizure. Further, a large number of openings 115 in the motor rotation direction A arranged in a staggered manner provided on the separation plate 114 allow the suction pipe 8 to be opened.
The refrigerant gas flowing from 2 forms a swirl flow accelerated in the motor rotation direction A and efficiently circulates around the motor M, thereby having an effect of cooling the motor M and preventing a rise in the temperature of the motor. be able to.

Next, a third embodiment will be described with reference to FIGS. FIG. 5 is a perspective view of a main part of a scroll compressor to which the present invention is applied, and FIG. 6 is a sectional view thereof. The scroll compressor has a sealed housing 4 in which a scroll-type compression mechanism C as a compression element is housed (see FIG. 8). Further, a separation plate 116 is provided in the closed housing 4 near the suction pipe 82 (see FIG. 8). This separation plate 11
Numeral 6 is for separating the refrigerant gas containing the lubricating oil flowing from the suction pipe 82 into the lubricating oil and the refrigerant gas. FIG.
Alternatively, as shown in FIG. 6, the separation plate 116 has a U-shaped cross section with a flange at both ends, and has an opening for deflecting the flow in the motor rotation direction A. The open portion is a large opening (slit shape) 117 in the motor rotation direction A including an opening portion and a flange portion. The flange portion is provided inside the closed housing 4 and is inclined in the motor rotation direction A. The opening is formed to extend in the motor rotation direction A. This opening 117 is also provided on the side wall on the downstream side in the motor rotation direction A, as shown in FIG. 5 or FIG.

Refrigerant gas containing the lubricating oil flowing from the suction pipe 82 collides with the separating plate 116, whereby the lubricating oil is separated, and the lubricating oil in the lower part of the body housing 4 is removed from the gap between the motor M and the body housing 4. Lead to reservoir 81. Thereby, the amount of lubricating oil discharged from the discharge pipe 1 of the compressor to the refrigerant circuit is reduced. On the other hand, by providing the separation plate 116 with an opening for deflecting the flow in the motor rotation direction A, that is, a large opening 117 in the motor rotation direction A, the refrigerant gas forms a swirl flow accelerated in the motor rotation direction A, and the efficiency is improved. It circulates around the motor M well.

By the oil separating action of the separating plate 116,
Since the lubricating oil is guided to the lubricating oil reservoir 81 in the lower part of the body housing 4, a decrease in the amount of lubricating oil in the compressor can be prevented, and each sliding portion can be sufficiently lubricated, which has the effect of preventing seizure. Further, the refrigerant gas flowing from the suction pipe 82 is formed into a swirl flow accelerated in the motor rotation direction A by the large opening 117 provided in the separation plate 116 in the motor rotation direction A. To circulate around,
It has the effect of cooling the motor M and can prevent the temperature of the motor from rising.

Next, a fourth embodiment will be described with reference to FIG. FIG. 1 is a sectional view of a main part of a scroll compressor to which the present invention is applied. As in the other embodiments, the scroll compressor has a sealed housing 4, in which a scroll-type compression mechanism C as a compression element is housed (see FIG. 8). Also,
In the closed housing 4, a separation plate 11 is provided near the suction pipe 82.
8 (see FIG. 8). This separation plate 118
Is for separating the refrigerant gas containing the lubricating oil flowing from the suction pipe 82 into the lubricating oil and the refrigerant gas. As in the other embodiments, the separation plate 118 has a U-shaped cross section at the upper end and has an opening for deflecting the flow in the motor rotation direction A. The opening has a slit shape including an opening and a flange. The flange is provided inside the closed housing 4 and is inclined in the motor rotation direction A. Is formed so as to extend. Also, this separation plate 1
18, a net-like cover 1 is provided on the entire surface of the slit-shaped opening.
19 are provided.

Refrigerant gas containing the lubricating oil flowing from the suction pipe 82 collides with the separating plate 118, whereby the lubricating oil is separated, and the lubricating oil at the lower portion of the body housing 4 is removed from the gap between the motor M and the body housing 4. Lead to reservoir 81. Thereby, the amount of lubricating oil discharged from the discharge pipe 1 of the compressor to the refrigerant circuit is reduced. On the other hand, the refrigerant gas forms a swirling flow accelerated in the motor rotation direction A by providing an opening in the separation plate 118 for deflecting the flow in the motor rotation direction A, that is, a slit shape inclined in the motor rotation direction A. Then, it circulates efficiently around the motor M. In addition, by using the mesh cover 119 together, the contact area with the refrigerant gas passing through the opening increases, and the oil separation effect can be further improved.

By the oil separating action of the separating plate 118,
Since the lubricating oil is guided to the lubricating oil reservoir 81 in the lower part of the body housing 4, a decrease in the amount of lubricating oil in the compressor can be prevented, and each sliding portion can be sufficiently lubricated, which has the effect of preventing seizure. Further, by deflecting the flow in the motor rotation direction A by the separation plate 118, the refrigerant gas forms a swirling flow accelerated in the motor rotation direction A, and efficiently circulates around the motor. Same as in the case. In this embodiment, the net-shaped cover 119 is provided in the slit shape of the separation plate 112 in the first embodiment.
For example, the separation plate 114 in the second or third embodiment,
The mesh cover 119 may be provided on the 116.
That is, in the present embodiment, the present invention can be applied to provide the mesh cover 119 in the refrigerant gas passage regardless of the opening shape.

[0040]

According to the hermetic compressor of the present invention, a compression mechanism and a motor for driving the compression mechanism are housed in a closed housing, and lubricating oil is supplied from a suction pipe provided in the closed housing. In the compressor into which the refrigerant gas containing flows, a separation plate for separating lubricating oil from the refrigerant gas is installed in the closed housing, and the separation plate has a flow in the rotation direction of the motor through the refrigerant gas passage. An opening for deflecting is provided, and the motor is cooled by refrigerant gas.Since it is characterized by a simpler structure, the amount of lubricating oil in the compressor is reduced by separating oil from refrigerant gas containing lubricating oil. It is possible to secure and avoid seizure due to poor lubrication of each sliding portion and to achieve compatibility with motor cooling.

Further, when the opening portion is constituted by an inclined slit shape, it is easy to manufacture a separation plate for achieving the above-mentioned effects, and the cost can be reduced.

Further, when the opening portions are formed by a group of openings arranged in a staggered manner and directed in the motor rotation direction A, the production of the separation plate for achieving the above-mentioned effects is facilitated, and the cost can be reduced. .

The separating plate has a shape protruding toward the motor, and the opening is provided also on a side wall of the separating plate on the downstream side in the motor rotation direction A to reduce the opening area in the motor rotation direction A. When it is increased, the flow rate of the refrigerant gas to the motor increases, and the motor cooling function can be further enhanced.

When a net-like cover is attached to the opening, the above effect can be maintained and the oil separating effect can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a hermetic compressor according to a first embodiment of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a perspective view of a main part of a hermetic compressor according to a second embodiment of the present invention.

FIG. 4 is a sectional view of FIG. 3;

FIG. 5 is a perspective view of a main part of a hermetic compressor according to a third embodiment of the present invention.

FIG. 6 is a sectional view of FIG. 5;

FIG. 7 is a sectional view of a main part of a hermetic compressor according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view of a conventional scroll compressor.

FIG. 9 is an external view in which a part of another conventional scroll compressor is broken.

FIG. 10 is a sectional view of a main part of another conventional scroll compressor.

FIG. 11 is a perspective view of a baffle plate in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Discharge pipe 2 Top housing 3 Discharge cover 4 Body housing 5 Discharge valve 6 Discharge port 7 Compression chamber 8 Retainer 9 Oldham ring 22 Discharge chamber 31 Fixed scroll 32 Orbiting scroll 41 Frame 51 Oil inlet 52 Oil supply hole 61 Rotating shaft 62 Eccentric pin 63 Boss 71 Main bearing 72 Sub bearing 73 Slewing bearing 81 Lubricating oil 82 Suction pipe 91 Motor / rotor 92 Motor / stator 93 Coil end 94 Air gap 101 Collision wall 102 Separation chamber 103 Opening 111 Baffle plates 112, 114, 116, 118 Separating plate 113 Slit 115, 117 Opening 119 Net-like cover

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Bito 3-1-1 Asahi-cho, Nishibiwajima-cho, Nishi-Kasugai-gun, Aichi Prefecture F-term in Air Conditioning Works, Mitsubishi Heavy Industries, Ltd. BB04 BB12 BB50 CC09 CC34 CC44

Claims (5)

[Claims] 1. A compressor in which a compression mechanism and a motor for driving the compression mechanism are housed in a sealed housing, and a refrigerant gas containing lubricating oil flows from a suction pipe provided in the sealed housing. A separation plate for separating the lubricating oil from the refrigerant gas is provided in the closed housing, and the separation plate has an opening for deflecting the flow in the rotation direction of the motor in the refrigerant gas passage, A hermetic compressor characterized by cooling a motor with gas. 2. The hermetic compressor according to claim 1, wherein said open portion is formed in an inclined slit shape. 3. The hermetic compressor according to claim 1, wherein the opening is formed by a group of openings arranged in a staggered manner and oriented in the direction of rotation of the motor. 4. The separation plate has a shape protruding toward the motor, and the opening is provided also on a side wall of the separation plate on the downstream side in the motor rotation direction to increase the opening area in the motor rotation direction. The hermetic compressor according to claim 2 or 3, wherein: 5. The hermetic compressor according to claim 1, wherein a mesh cover is attached to the opening.