JP2007126978A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor with an oil separator in which the structure of the oil separator is simplified and manufacturable with reduced cost. <P>SOLUTION: This compressor 10 comprises a housing 11 having a space m therein, a compression mechanism 12 disposed in the housing 11 and compressing a fluid taken into the space m, a rotating shaft 13 driving the compression mechanism 12, and an oil separating chamber 17 disposed in the housing 11 and separating a lubricating oil LO mixed in the fluid discharged from the compression mechanism 12 from the fluid by a centrifugal separating action. An introduction hole 17b formed to guide the fluid compressed by the compression mechanism 12 in the tangential direction of the inner wall surface 17a of the oil separating chamber is formed at one end of the oil separating chamber 17. An oil separation promoting part 41 having a downward flow generating part 40 for imparting a downward velocity component to the fluid guided to the inside of the oil separating chamber 17 through the introduction hole 17b and moving along the inner wall surface 17a is formed at the inside one end of the oil separation chamber 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a compressor applied to an air conditioner, a refrigeration unit for land transportation, and the like.

A compressor provided with a centrifugal oil separator is known as a compressor applied to an air conditioner, a refrigeration unit for land transportation, and the like (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 5-296611

The centrifugal oil separator disclosed in the above patent document has a side wall composed of a cylindrical portion and a conical portion, and one or a plurality of spiral grooves on the inner surface of the cylindrical portion and the conical portion. The strip is recessed.
However, in such a centrifugal separation type oil separator, it is necessary to connect the members having different shapes, and further to form a continuous spiral groove on the inner surface from the fluid inlet to the oil outlet. However, there is a problem that the manufacturing cost increases.

  The present invention has been made in view of the above problems, and an object thereof is to provide a compressor including an oil separator that can simplify the configuration of the oil separator and can reduce the manufacturing cost. It is said.

The present invention employs the following means in order to solve the above problems.
A compressor according to the present invention includes a housing having a space therein, a compression mechanism that is disposed in the housing and compresses a fluid taken into the space, a rotary shaft that drives the compression mechanism, and an interior of the housing. And an oil separation chamber that separates the lubricating oil mixed in the fluid discharged from the compression mechanism from the fluid by a centrifugal separation action, at one end of the oil separation chamber, An introduction hole drilled to guide the fluid compressed by the compression mechanism in a tangential direction of the inner wall surface is provided, and the oil separation is performed inside the one end portion of the oil separation chamber through the introduction hole. An oil separation promoting unit is provided that includes a downward flow generating unit that is guided into the room and applies a downward velocity component to the fluid that moves along the inner wall surface.
According to such a compressor, a conventional configuration in which a downward velocity component is imparted to the swirling flow swirling along the inner wall surface of the oil separation chamber is disclosed in, for example, Japanese Patent Laid-Open No. 5-296611. The manufacturing cost can be reduced.
In addition, the lubricating oil separated from the refrigerant gas flows down through the inner wall surface of the oil separation chamber, and the refrigerant gas from which the lubricating oil is separated flows upward through the central portion of the oil separation chamber. Become. Accordingly, it is possible to prevent the separated lubricating oil from being wound up by the refrigerant gas traveling from the oil reservoir chamber side toward the discharge port side and flowing out from the discharge port into the refrigeration cycle together with the refrigerant gas. The separation efficiency can be improved, the lubricating oil can be reliably supplied to each sliding portion, the life of the compressor can be extended, and the reliability can be improved. .

In the compressor, it is more preferable that the oil separation promoting portion is provided with a shortcut prevention portion from one end portion of the oil separation chamber to the lower side.
According to such a compressor, the refrigerant gas introduced into the oil separation chamber swirls in the circumferential direction along the inner wall surface of the oil separation chamber, the surface of the downflow generation unit, and the outer wall surface of the shortcut prevention unit. However, the lubricating oil having a large specific gravity comes into contact with the inner wall surface and is separated from the refrigerant gas by the action of centrifugal force caused by the turning. The separated lubricating oil moves downward along the inner wall surface, then flows into the oil storage chamber located below, and is stored in the oil storage chamber. On the other hand, the refrigerant gas from which the lubricating oil has been separated passes through the central portion of the oil separation chamber, is led to the discharge port through the communication hole formed in the central portion of the shortcut prevention portion, and then from the discharge port to the compressor. It is discharged outside.
As described above, the outer wall surface of the shortcut prevention unit can prevent the refrigerant gas from being short-circuited from the introduction hole to the discharge port, and the lubricant oil and the refrigerant gas pass through the discharge port and pass through the discharge port. Can be prevented from being discharged.

In the compressor, it is more preferable that the oil separation promoting portion is manufactured integrally with a part of the wall portion of the oil separation chamber provided with the introduction hole.
According to such a compressor, the introduction hole can be positioned with high accuracy and the manufacturing cost can be further reduced.

In the compressor, it is more preferable that the oil separation promoting portion is configured using a leaf spring or a coil spring that spirally extends downward from the vicinity of the introduction hole.
According to such a compressor, since a leaf spring or a coil spring that is relatively inexpensive and easily available is used, the manufacturing cost can be further reduced.

  According to the present invention, the configuration of the oil separator can be simplified, and the manufacturing cost can be reduced.

  Hereinafter, a first embodiment of a compressor according to the present invention (hereinafter referred to as a “scroll type compressor”) will be described with reference to FIGS. 1 and 2, but the present invention is not limited thereto. Of course. FIG. 1 is a view showing the scroll compressor 10 of the present embodiment, and is a cross-sectional structure view when seen in a cross section including the axis of the rotating shaft. The discharge port 15a, the oil separation chamber 17, It is the figure which cut the discharge chamber 35 in the part which is easy to understand. 2 is an enlarged view of the oil separation promoting portion 41 provided in the oil separation chamber 17, where (a) is an overall perspective view and (b) is a plan view.

  As shown in FIG. 1, the scroll compressor 10 according to the present embodiment includes a housing 11 having a sealed space m therein, and a refrigerant gas (fluid) disposed in the housing 11 and taken into the sealed space m. The main component is a scroll compression mechanism 12 that compresses the scroll compression mechanism 12 and a rotation shaft 13 that drives the scroll compression mechanism 12.

The housing 11 includes a front housing 14 and a rear housing 15, which are combined and then coupled with a plurality of bolts (not shown) to form a sealed space m inside. ing. Reference numeral 16 denotes an O-ring that seals the joint portion between the front housing 14 and the rear housing 15 to keep the sealed space m sealed.
A suction port (not shown) for sucking refrigerant gas is formed in a side portion of the rear housing 15 so as to communicate with the sealed space m, and a scroll compression mechanism 12 is provided on an upper rear side of the rear housing 15. And a discharge port 15a for discharging the compressed refrigerant gas after the lubricating oil in the refrigerant gas is separated by the oil separation chamber 17 is formed. Further, the space formed on the lower rear side of the rear housing 15 is a lubricant separated by the oil separation chamber 17 (that is, the lubricant after the scroll compression mechanism 12 is lubricated and the compression chamber C is sealed) LO. The oil storage chamber 18 for storing

The oil separation chamber 17 is a cylindrical space, and an inner wall surface 17a forming the cylindrical space is along the longitudinal axis of the oil separation chamber 17, and the inner wall surface 17a is substantially parallel to the longitudinal axis. It is formed as follows.
In addition, the oil separation chamber 17 is introduced at one end (the end on the discharge port 15a side) so as to guide the refrigerant gas (fluid) compressed by the scroll compression mechanism 12 in the tangential direction of the inner wall surface 17a. A hole 17b is provided. Then, inside the one end portion of the oil separation chamber 17, the discharge port 15 a is supplied to the refrigerant gas that is guided into the oil separation chamber 17 through the introduction hole 17 b and moves along the inner wall surface 17 a in the oil separation chamber 17. An oil separation accelerating unit 41 including a downward flow generating unit 40 that provides a velocity component in the opposite direction to the direction is provided. On the other hand, a bottom plate 17c is provided at the other end (bottom) of the oil separation chamber 17, and a through hole 17d penetrating in the thickness direction is formed at the center of the bottom plate 17c.

  With this configuration, the refrigerant gas introduced into the oil separation chamber 17 moves downward while swirling in the circumferential direction in the oil separation chamber 17, and the lubricating oil having a large specific gravity due to the centrifugal force due to the swirling. The LO comes into contact with the inner wall surface 17a and is separated from the refrigerant gas. The separated lubricating oil LO moves downward along the inner wall surface 17a, is temporarily received by the upper surface of the bottom plate 17c, and finally passes through the through-hole 17d to be located below the oil reservoir chamber 18 located below. Into the oil storage chamber 18. On the other hand, the refrigerant gas from which the lubricating oil LO has been separated passes through the central portion of the oil separation chamber 17 and is guided to the discharge port 15a through the through hole 42 formed in the central portion of the oil separation promoting portion 41. It is discharged from the discharge port 15a to the outside of the scroll compressor 10.

The scroll compression mechanism 12 includes a fixed scroll 19 and a turning scroll 20.
The fixed scroll 19 includes a fixed end plate 19a and a spiral wall body 19b standing on the inner surface thereof, and a discharge port 21 is formed at the center of the fixed end plate 19a. The discharge port 21 is opened and closed by a discharge valve 23 attached to the rear surface (back surface) of the fixed end plate 19a via a bolt 22.

  A communication passage 24 that communicates the bottom of the oil storage chamber 18 and the suction side bottom of the sealed space m is formed at the lower end of the fixed scroll 19. A filter (not shown) and a spiral pin 26 for adjusting the flow rate are arranged.

The orbiting scroll 20 includes an orbiting end plate 20a and a spiral wall body 20b standing on the inner surface thereof. An eccentric bush 28 is rotatably fitted in a boss 27 erected on the outer surface of the swivel end plate 20a via a needle bearing 29, and the rotary shaft 13 is inserted into a hole formed in the eccentric bush 28. An eccentric pin 13a that protrudes from the end is fitted. A plurality of compression chambers C are formed by causing the fixed scroll 19 and the orbiting scroll 20 to be eccentric from each other by a predetermined distance and engaged with each other while shifting the angle by 180 degrees.
Further, an Oldham ring (spinning prevention mechanism) 30 is provided between the orbiting scroll 20 and the front housing 14, and the orbiting scroll 20 does not rotate around the eccentric bush 28 when the rotating shaft 13 is rotated. It is like that. Accordingly, when the rotary shaft 13 is rotated, the orbiting scroll 20 does not rotate but only performs a revolving orbiting motion. The eccentric bush 28 is provided with a balance weight 31 so as to cancel the centrifugal force accompanying the revolution of the orbiting scroll 20.

The rotating shaft 13 is a rotor shaft that rotates about its axis by a driving mechanism (not shown) such as an engine or an electric motor, and the above-described eccentric pin 13a having an eccentric axis is projected from the tip thereof. The rotary shaft 13 is supported by a first bearing 32 and a second bearing 33 provided on the front housing 14 side so as to be rotatable around the axis.
Further, for example, an electromagnetic clutch (not shown) is disposed at one end portion (left end portion in FIG. 1) of the rotating shaft 13, and thereby driving force from an engine, an electric motor, or the like (not shown) It is transmitted to the rotating shaft 13 or not transmitted.
In addition, the code | symbol 34 in a figure is an O-ring which seals the junction part between the fixed scroll 19 and the rear housing 15, and maintains the sealed state of the sealed space m.

  In the scroll compressor 10 having such a structure, when an electromagnetic clutch is engaged, a driving force from an engine, an electric motor, or the like is transmitted to the rotating shaft 13 and the rotating shaft 13 is rotated. 13a, the eccentric bush 28, and the boss 27 are transmitted to the orbiting scroll 20 of the scroll compression mechanism 12. The orbiting scroll 20 is configured to perform a revolving orbiting motion on a circular orbit having a revolution orbiting radius as a radius while being prevented from rotating by the Oldham ring 30.

  Then, the refrigerant gas enters the sealed space m of the housing 11 through the suction port, and is sucked into the compression chamber C of the scroll compression mechanism 12 through a path not shown. Then, as the volume of the compression chamber C decreases due to the revolving orbiting motion of the orbiting scroll 20, the refrigerant gas reaches the center while being compressed, and the lubricating oil LO is discharged from the discharge port 21 through the discharge chamber 35 and the introduction hole 17b. The contained refrigerant is guided into the oil separation chamber 17 and swirled along the inner wall surface 17 a of the oil separation chamber 17. As a result, the lubricating oil LO mixed in the refrigerant falls down while turning along the inner wall surface 17a of the oil separation chamber 17 by the centrifugal separation action, and is stored in the oil reservoir chamber 18 while being lubricated. The refrigerant from which the oil LO has been separated is discharged out of the scroll compressor 10 through the discharge port 15a of the rear housing 15.

  On the other hand, the lubricating oil LO stored in the oil storage chamber 18 is guided to the suction side bottom of the sealed space m through the communication path 24, and then stirred (raised) by the orbiting scroll 20 before being compressed. In this way, the compression mechanism 12 is lubricated and the sealed space m is sealed.

According to the scroll compressor 10 according to the present embodiment, a configuration in which a downward velocity component is imparted to the swirling flow swirling along the inner wall surface 17a of the oil separation chamber 17 is a conventional one (for example, Japanese Patent Laid-Open No. Hei 5- And the manufacturing cost can be reduced.
The lubricating oil LO separated from the refrigerant gas flows down through the inner wall surface 17 a of the oil separation chamber 17, and the refrigerant gas from which the lubricating oil LO is separated passes through the central portion of the oil separation chamber 17. It will head upwards. Therefore, the separated lubricating oil LO is wound up by the refrigerant gas traveling from the oil reservoir chamber 18 toward the discharge port 15a, and flows out from the discharge port 15a into the refrigeration cycle together with the refrigerant gas. It is possible to improve the separation efficiency as well as the lubrication oil LO can be reliably supplied to each sliding part, and the life of the compressor can be extended and the reliability can be improved. Can be achieved.

A second embodiment of the scroll compressor according to the present invention will be described with reference to FIG.
The scroll compressor according to this embodiment is different from that of the first embodiment described above in that an oil separation promoting part 51 is provided instead of the oil separation promoting part 41. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

  The oil separation promoting portion 51 is provided with a shortcut preventing portion 52 that extends toward the bottom plate 17 c of the oil separation chamber 17. The shortcut prevention unit 52 is a pipe-shaped (tubular) member in which a communication hole 53 is formed along the longitudinal axis thereof to communicate the internal space of the oil separation chamber 17 and the space upstream of the discharge port 15a. is there.

According to the scroll compressor according to the present embodiment, the refrigerant gas introduced into the oil separation chamber 17 is transmitted from the inner wall surface 17a of the oil separation chamber 17, the surface of the downflow generation unit 40, and the outer wall surface of the shortcut prevention unit 52. Accordingly, the lubricating oil LO having a large specific gravity comes into contact with the inner wall surface 17a and is separated from the refrigerant gas by the action of the centrifugal force caused by the turning. The separated lubricating oil LO moves downward along the inner wall surface 17a, is temporarily received by the upper surface of the bottom plate 17c, and finally passes through the through-hole 17d to be located below the oil reservoir chamber 18 located below. Into the oil storage chamber 18. On the other hand, the refrigerant gas from which the lubricating oil LO has been separated passes through the central portion of the oil separation chamber 17, is guided to the discharge port 15 a through the communication hole 53 formed in the central portion of the shortcut prevention portion 52, and then discharged. It is discharged from the port 15a to the outside of the scroll compressor 10.
As described above, the outer wall surface of the shortcut prevention unit 52 can prevent the refrigerant gas from being short-cut from the introduction hole 17b to the discharge port 15a, and the lubricating oil LO scrolls together with the refrigerant gas via the discharge port 15a. It can prevent being discharged out of the mold compressor.
Other functions and effects are the same as those of the above-described first embodiment, and thus description thereof is omitted here.

A third embodiment of the scroll compressor according to the present invention will be described with reference to FIGS.
The scroll compressor 10a in the present embodiment is different from that in the second embodiment described above in that an oil separation promotion unit 61 is provided instead of the oil separation promotion unit 51. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as embodiment mentioned above.

  The oil separation promoting portion 61 is formed by integrating the oil separation promoting portion 51 described in the second embodiment with a part of a wall portion located at one end portion of the oil separation chamber 17, and the rear housing 15. It is comprised so that attachment or detachment is possible with respect to the bottom part.

According to the scroll compressor 10a according to the present embodiment, the oil separation promoting portion 61 is manufactured integrally with a part of the wall portion of the oil separation chamber 17 provided with the introduction hole 17b. 17b can be positioned with high accuracy, and the manufacturing cost can be further reduced.
Other functions and effects are the same as those of the above-described embodiment, and thus description thereof is omitted here.

A fourth embodiment of the scroll compressor according to the present invention will be described with reference to FIG.
The scroll compressor according to this embodiment is different from those of the first embodiment and the second embodiment described above in that an oil separation promotion unit 71 is provided instead of the oil separation promotion units 41 and 51. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as embodiment mentioned above.

  The oil separation accelerating portion 71 has one surface of a ring-shaped plate-like member 73 (a surface facing the bottom plate 17c of the oil separation chamber 17) having a through hole 72 penetrating in the thickness direction at the center thereof. Further, for example, a leaf spring 75 extending in a spiral shape toward the bottom plate 17c of the oil separation chamber 17 is attached via a fastening member 74 such as a screw. The leaf spring 75 is guided into the oil separation chamber 17 through the introduction hole 17b, and gives a velocity component in the opposite direction to the discharge port 15a to the refrigerant gas moving along the inner wall surface 17a in the oil separation chamber 17. Further, it is attached to the plate-like member 73.

According to the scroll compressor according to the present embodiment, the refrigerant gas introduced into the oil separation chamber 17 is sent to the inner wall surface 17a of the oil separation chamber 17 and one surface of the leaf spring 75 (the bottom plate 17c of the oil separation chamber 17). Along the circumferential surface), the lubricant LO moves downward while turning in the circumferential direction, and the lubricating oil LO having a large specific gravity comes into contact with the inner wall surface 17a and is separated from the refrigerant gas by the action of the centrifugal force caused by the turning. It will be. The separated lubricating oil LO moves downward along the inner wall surface 17a, is temporarily received by the upper surface of the bottom plate 17c, and finally passes through the through-hole 17d to be located below the oil reservoir chamber 18 located below. Into the oil storage chamber 18. On the other hand, the refrigerant gas from which the lubricating oil LO has been separated passes through the central portion of the oil separation chamber 17, is led to the discharge port 15 a through the through hole 72 formed in the central portion of the plate-like member 73, and then discharged. It is discharged from the port 15a to the outside of the scroll compressor 10.
As described above, according to the scroll compressor according to the present embodiment, the configuration in which the downward velocity component is imparted to the swirling flow swirling along the inner wall surface 17a of the oil separation chamber 17 is a conventional one (for example, a special feature). (Disclosed in Kaihei 5-296611) and manufacturing cost can be reduced.
The lubricating oil LO separated from the refrigerant gas flows down through the inner wall surface 17 a of the oil separation chamber 17, and the refrigerant gas from which the lubricating oil LO is separated passes through the central portion of the oil separation chamber 17. It will head upwards. Therefore, the separated lubricating oil LO is wound up by the refrigerant gas traveling from the oil reservoir chamber 18 toward the discharge port 15a, and flows out from the discharge port 15a into the refrigeration cycle together with the refrigerant gas. It is possible to improve the separation efficiency as well as the lubrication oil LO can be reliably supplied to each sliding part, and the life of the compressor can be extended and the reliability can be improved. Can be achieved.

A fifth embodiment of the scroll compressor according to the present invention will be described with reference to FIG.
The scroll compressor according to this embodiment is different from that of the fourth embodiment described above in that an oil separation promotion unit 81 is provided instead of the oil separation promotion unit 71. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as embodiment mentioned above.

  The oil separation promoting portion 81 is a so-called “coil spring” having an outer diameter that is equal to the inner diameter of the inner wall surface 17 a of the oil separation chamber 17 or slightly smaller than the inner diameter of the inner wall surface 17 a of the oil separation chamber 17. One end face (the lower end face in FIG. 7) abuts the surface of the bottom plate 17c of the oil separation chamber 17, and is guided into the oil separation chamber 17 through the introduction hole 17b. It arrange | positions so that the velocity component of the opposite direction to the discharge port 15a may be given to the refrigerant gas which moves along the wall surface 17a.

According to the scroll compressor according to the present embodiment, the refrigerant gas introduced into the oil separation chamber 17 swirls in the circumferential direction along the inner wall surface 17a of the oil separation chamber 17 and the surface of the oil separation promoting portion 81. However, the lubricating oil LO having a large specific gravity comes into contact with the inner wall surface 17a and is separated from the refrigerant gas by the action of the centrifugal force caused by the turning. The separated lubricating oil LO moves downward along the inner wall surface 17a, is temporarily received by the upper surface of the bottom plate 17c, and finally passes through the through-hole 17d to be located below the oil reservoir chamber 18 located below. Into the oil storage chamber 18. On the other hand, the refrigerant gas from which the lubricating oil LO has been separated passes through the central portion of the oil separation chamber 17, is guided to the discharge port 15 a, and is then discharged from the discharge port 15 a to the outside of the scroll compressor 10.
As described above, according to the scroll compressor according to the present embodiment, the configuration in which the downward velocity component is imparted to the swirling flow swirling along the inner wall surface 17a of the oil separation chamber 17 is a conventional one (for example, a special feature). (Disclosed in Kaihei 5-296611) and manufacturing cost can be reduced.
Other functions and effects are the same as those of the above-described fourth embodiment, and a description thereof is omitted here.

In addition, the scroll compressor mentioned above can also be made into not only a closed type as mentioned above but a semi-hermetic type or an open type scroll compressor.
Further, the compressor is not limited to the scroll compressor as described above, and may be a swash plate compressor, a reciprocating compressor, or the like.
Further, the compressor is not limited to the horizontal type as described above, but may be a vertical type.

  Furthermore, the oil separation promoting portions 41 and 51 can be configured as separate members so as to be attachable (or detachable) to the oil separation chamber 17, or configured integrally with the oil separation chamber 17. You can also. When configured as a separate member, the oil separation promoting portions 41 and 51 are fixed to the oil separation chamber 17 by press-fitting, bonding, or fastening members (for example, screws). On the other hand, when constituted integrally, it is constituted by plastic working, machining, or casting.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the scroll compressor by this invention, Comprising: It is a cross-section figure when it sees in the cross section containing the axis line of the rotating shaft, Comprising: A discharge port, an oil separation chamber, and a discharge chamber are understood It is the figure cut in the part which is easy to do. It is an enlarged view of the oil separation promotion part provided in the oil separation chamber shown in FIG. 1, (a) is a whole perspective view, (b) is a top view. It is an enlarged view of the principal part which shows 2nd Embodiment of the scroll compressor by this invention, Comprising: (a) is a whole perspective view of an oil separation promotion part, (b) is a top view of an oil separation promotion part. It is a figure which shows 3rd Embodiment of the scroll-type compressor by this invention, Comprising: It is a cross-sectional structure figure at the time of seeing in the cross section containing the axis line of the rotating shaft, Comprising: It is the figure cut in the part which is easy to do. It is an enlarged view of the oil separation promotion part provided in the oil separation chamber shown in FIG. 4, Comprising: (a) is a whole perspective view, (b) is a top view. It is a principal part expanded sectional view which shows 4th Embodiment of the scroll compressor by this invention. It is a principal part expanded sectional view which shows 5th Embodiment of the scroll compressor by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Scroll type compressor 10a Scroll type compressor 11 Housing 12 Compression mechanism 13 Rotating shaft 17 Oil separation chamber 17a Inner wall surface 17b Introduction hole 40 Downflow generation part 41 Oil separation promotion part 51 Oil separation promotion part 52 Short cut prevention part 61 Oil separation Promotion part 71 Oil separation promotion part 75 Leaf spring 81 Coil spring (oil separation promotion part)
LO Lubricant m Sealed space

Claims (4)

A housing having a space inside;
A compression mechanism that is disposed within the housing and compresses a fluid taken into the space;
A rotating shaft for driving the compression mechanism;
A compressor provided with an oil separation chamber disposed in the housing and separating lubricating oil mixed in the fluid discharged from the compression mechanism from the fluid by centrifugal separation;
An introduction hole is provided at one end of the oil separation chamber so as to guide the fluid compressed by the compression mechanism in a tangential direction of the inner wall surface, and inside the one end of the oil separation chamber. And an oil separation promoting portion provided with a downward flow generating portion that is guided into the oil separation chamber through the introduction hole and applies a downward velocity component to the fluid moving along the inner wall surface. Features compressor.   The compressor according to claim 1, wherein a shortcut prevention unit is provided in the oil separation promoting unit from one end of the oil separation chamber downward.   The compressor according to claim 1 or 2, wherein the oil separation promoting portion is manufactured integrally with a part of the wall portion of the oil separation chamber provided with the introduction hole.   3. The compressor according to claim 1, wherein the oil separation promoting portion is configured by using a plate spring or a coil spring that spirally extends downward from the vicinity of the introduction hole. 4.

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