JP4970902B2 - Scroll compressor - Google Patents

Description

  The present invention relates to a scroll compressor, and more particularly, to a scroll compressor that incorporates an oil separator so that separated oil can be efficiently returned to a portion requiring lubrication, particularly a drive side portion.

  The structure of a scroll type compressor having a built-in oil separator, in which oil separated from a fluid to be compressed (for example, a refrigerant) is stored in an oil storage chamber and then returned to a portion where lubrication is required. Is known (for example, Patent Document 1).

  However, in such a conventional scroll type compressor, the separated oil is really required for lubrication, for example, a drive bearing in a drive unit that drives a movable spiral body, a built-in motor unit, etc. It was not structured to return the separated oil.

  Further, in the conventional scroll compressor, when an oil separator is incorporated, the oil separator is limited to a centrifugal oil separator because of oil separation performance. However, the centrifugal oil separator is generally high in cost and has a problem that the axial dimension of the compressor is required to some extent because it is built-in, so that it is difficult to reduce the size of the compressor.

As the oil separator, in addition to the centrifugal oil separator, a chamber type oil separator that separates oil from the oil-containing fluid by reducing the flow rate of the oil-containing fluid introduced into the chamber is generally known. It has been. However, it has been considered that a chamber-type oil separator is difficult to employ in a scroll compressor, particularly an electric compressor, unless its separation capability is improved.
Japanese Patent Laid-Open No. 11-93880

  SUMMARY OF THE INVENTION An object of the present invention is to provide a scroll type compressor structure that can efficiently return oil separated by an oil separator to a portion that really needs lubrication.

  In addition, an object of the present invention is to enable the incorporation of a chamber-type oil separator, which has not been adopted in the past, thereby reducing the size of the entire compressor and efficiently separating and separating the separated oil. To achieve the return path.

  Furthermore, the subject of this invention is making it possible to achieve further miniaturization of the whole compressor and efficient local lubrication by devising the configuration of the oil return path.

In order to solve the above-mentioned problems, a scroll compressor according to the present invention stores oil separated from a fluid to be compressed by an oil separator in a fixed scroll body bottom plate of a scroll compressor incorporating an oil separator. An oil passage that guides oil from the oil storage chamber located on the lower side of the compressor to the upper side of the compressor as seen in FIG .
An upper oil introduction path that guides oil guided to the compressor upper side by the conveying oil path to the compressor drive side on the compressor upper side, or oil stored in the oil storage chamber on the compressor lower side At least a lower oil introduction path leading to the drive side of
At least one of the upper oil introduction passage and the lower oil introduction passage is provided with an orifice filter having a filter portion on the oil inflow side and an orifice portion on the oil outflow side, and the filter portion and the orifice portion of the orifice filter are mutually connected. It consists of what is arrange | positioned in the eccentric position . Since the oil separated by the oil separator is guided from the oil storage chamber to the upper side of the compressor, the oil can be returned from there, that is, from a relatively higher position in the compressor to the portion requiring lubrication relatively easily. It becomes possible. In addition, since the oil passage is directly provided in the fixed spiral body bottom plate, the oil passage extending from the lower side to the upper side is relatively easy, for example, compared to the case where the oil passage is provided in this portion, for example, the fixed spiral body bottom plate. It can be easily formed by forming a groove by machining or molding on the surface opposite to the compression mechanism, and it can be formed with high accuracy in a desired form even if it is a narrow oil passage, It becomes possible to send the oil from the lower side to the upper side without fail.

  The oil passage is preferably formed in a mating surface portion between the fixed spiral body bottom plate and the casing. By forming in this part, for example, by forming a groove by machining or molding on the surface opposite to the compression mechanism of the fixed spiral body bottom plate as described above, the fixed spiral body and the casing are in a predetermined positional relationship. By simply assembling, the desired oil passage can be easily completed.

  As the oil separator, in addition to a centrifugal oil separator, a chamber-type oil separator that separates oil from an oil-containing compressed fluid by decelerating the flow rate of the oil-containing compressed fluid that has been introduced into the chamber. It is also possible to configure.

In the case of a chamber-type oil separator, the present invention also provides a scroll type compressor that does not have the above-described oil passage as a constituent feature. That is, the scroll compressor incorporates a chamber-type oil separator that separates oil from the oil-containing compressed fluid by reducing the flow rate of the oil-containing compressed fluid that has been introduced into the chamber. Establish an oil storage chamber to store the separated oil ,
At least a part of the discharge chamber is configured as a chamber-type oil separator, and the passage cross-sectional area at the outlet portion of the oil separator has a passage cut-off at the discharge hole arrangement portion from the compression mechanism that forms the inlet portion to the oil separator. The scroll compressor is set to 20 to 50% of the area, and an outlet portion of the oil separator is positioned at a rear end portion of a retainer provided for regulating the discharge valve .

  Further, in the present invention, it is possible to adopt a structure in which an upper oil introduction path is provided for guiding the oil guided to the compressor upper side by the carrying oil path to the compressor driving side on the compressor upper side. The upper oil introduction path is easy because the upper oil introduction path that leads the oil that has already been guided to the upper part of the compressor by the conveying oil path to the drive side of the compressor is formed on the upper side of the compressor. Formed in the compressor. In other words, the separated oil is efficiently guided to the drive side of the compressor via the compressor upper side. The drive side of this compressor is a part that requires lubrication. For example, a drive bearing or the like provided in the movable spiral drive unit is efficiently and sufficiently lubricated.

  In addition, when the compressor drive source is a built-in motor, it is possible to easily construct a structure in which the oil guided by the upper oil introduction path is guided to the motor side, achieving necessary lubrication, and cooling the motor. It is also possible to encourage.

  When an oil passage is formed up to the motor side, oil can be supplied from the oil passage in a spraying manner, or a cover member that regulates the oil passage is provided to more efficiently and locally provide oil to a portion requiring lubrication. It can also be set as the structure which supplies.

  In the scroll compressor according to the present invention, a structure may be provided in which a lower oil introduction path is provided for guiding the oil stored in the oil storage chamber to the compressor drive side on the compressor lower side. For supplying oil through the lower oil introduction path, it is basically unnecessary to pass through the above-described oil conveyance path.

  When the oil is guided to the compressor drive side on the compressor lower side through the lower oil introduction path, for example, the oil can be guided to a balance weight installation site provided on the movable spiral body drive side. This makes it possible to supply oil over a wider range as the balance weight rotates.

  In the present invention, when a chamber type oil separator is formed, the chamber type oil separator may be formed by a space between the fixed spiral body bottom plate and the casing. That is, the discharge chamber or a part thereof can be configured as a chamber-type oil separator.

  For example, the space between the fixed spiral body bottom plate and the casing may be partitioned into three rooms, and the three rooms may communicate with each other at least at one place. In this case, for example, the central chamber in the vertical direction can function mainly as a chamber type oil separator, the lower chamber can function mainly as an oil storage chamber, and the upper chamber can function as a chamber mainly connected to the discharge port. .

  Alternatively, a structure in which the space between the fixed spiral body bottom plate and the casing is partitioned into two chambers and a passage connected to the discharge port is provided, and the two chambers and the passage communicate with each other in at least one place. It can also be. In this case, for example, the upper chamber can function mainly as a chamber-type oil separator, and the lower chamber can function mainly as an oil storage chamber.

  Further, the oil storage chamber and the discharge port may be connected by at least two passages. By providing at least two passages, in addition to the gas from which the oil has been separated by the oil separator, part of the gas that has flowed into the oil storage chamber can smoothly reach the discharge port. The gas from which the gas is separated can flow out of the discharge port more easily and smoothly.

When at least a part of the discharge chamber is configured as a chamber-type oil separator, the passage cross-sectional area at the outlet portion of the oil separator is a discharge hole arrangement portion from the compression mechanism that forms the inlet portion to the oil separator. Ru is set to 20-50% of the flow passage area of the. That is, the passage sectional area is appropriately reduced at the oil separator outlet. With such a structure, it is possible to obtain a very high separation capability while being a chamber-type oil separator. In this structure, since the outlet of the oil separator, the structure being located in the rear end portion of the retainer that is provided for the discharge valve regulated, the reduction in cross-sectional area by the retainer arrangement, the cross-sectional area It becomes possible to use it for an appropriate aperture.

  When at least two passages are provided as described above, it is preferable that at least one of the at least two passages is a passage having a width of 10 mm or less extending in the circumferential direction of the fixed spiral body bottom plate. If the passage width is too large, the possibility that unseparated oil will flow out increases, so it is preferable to keep the width to 10 mm or less.

Further, in the scroll compressor according to the present invention, an orifice filter having a filter part on the oil inflow side and an orifice part on the oil outflow side is provided in at least one of the upper oil introduction path or the lower oil introduction path. Adopt the structure that has been . The filter portion of the orifice filter can appropriately control the amount of oil returned by the orifice portion while capturing foreign matter in the returned oil.

In addition, as the orifice filter, a filter in which the filter part and the orifice part are arranged at eccentric positions is used . Utilizing this eccentric structure, it is possible to effectively reduce the size of the compressor while having an orifice filter. In particular, by adopting a structure in which the center of the filter part is arranged closer to the compressor center than the center of the orifice part, or a structure in which the eccentric orifice filter is provided in such a positional relationship, It becomes possible to downsize the compressor in the radial direction.

  According to the scroll type compressor according to the present invention, since the oil passage that guides the oil separated by the oil separator from the oil storage chamber located on the lower side of the compressor to the upper side of the compressor is provided, the upper part of the compressor It is possible to return oil from the side to the site requiring lubrication relatively easily, particularly to the site requiring lubrication on the drive side.

  Further, as the oil separator, either a centrifugal oil separator or a chamber oil separator can be employed, and the degree of freedom in design is extremely large. In particular, chamber-type oil separators, which were not conventionally used in scroll compressors, can now be adopted by devising the structure of the passages, etc., thereby significantly reducing cost and compressing while ensuring desirable separation performance. The machine can be downsized.

  Furthermore, if an eccentric orifice filter is provided in the upper oil introduction path and the lower oil introduction path, it is possible to further reduce the size of the compressor while achieving appropriate control of foreign matter removal and return oil amount. .

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a scroll compressor according to a first embodiment of the present invention, and in particular, an example of a scroll compressor incorporating a centrifugal oil separator. In FIG. 1, reference numeral 1 denotes an entire scroll compressor. The scroll compressor 1 includes a fixed spiral body 2 and a movable spiral that swirls in a state in which rotation is prevented with respect to the fixed spiral body 2. A compression mechanism 4 that engages the body 3 is incorporated. In this embodiment, the movable spiral body 3 is driven by a motor 5 built in the compressor 1 and is prevented from rotating via a ball coupling 6 via a drive bearing 7 and a crankshaft 8 (drive shaft). It is designed to turn.

  As shown in FIGS. 2 to 4, a discharge chamber 9 is formed on the anti-compression mechanism 4 side of the fixed spiral body 2, and fluid (for example, refrigerant) compressed by the compression mechanism 4 is formed in the discharge chamber 9. ) Is introduced through the discharge valve 11 from the discharge hole 10. The opening degree of the discharge valve 11 is regulated by the retainer 12. In this embodiment, a centrifugal oil separator 13 is built in a casing 14 (cylinder head), and oil separated from the fluid to be compressed by the oil separator 13 is disposed below the oil separator 13 in the casing 14. An oil storage chamber 15 in which is stored is formed.

  The bottom plate 16 of the fixed spiral body 2 is provided with an oil passage 17 that guides oil from the oil storage chamber 15 to the compressor upper side. In the present embodiment, a groove-shaped oil passage 17 is formed on the surface of the fixed spiral body bottom plate 16 on the side opposite to the compression mechanism 4 so as to extend to the upper side over a half circumference. By assembling, a predetermined oil passage 17 is formed at the mating surface portion between the fixed spiral body 2 and the casing 14. The oil guided to the upper side of the compressor through the conveying oil passage 17 passes through the upper oil introduction passage 18 on the upper side of the compressor, and requires lubrication of the drive side of the compressor, particularly the motor 5 side and the drive bearing 7. To be guided to. For the motor 5, the introduced oil also has a cooling function. The upper oil introduction path 18 is provided with an orifice filter 21 including a filter portion 19 for capturing and removing foreign matter and an orifice portion 20 having a narrow inner diameter. In the present embodiment, the oil guided to the drive side of the compressor is supplied to the motor 5 side and the drive bearing 7 in a spraying manner through a relatively wide space 22 as shown in FIG. ing.

  The oil introduction part to the compressor drive side has a structure in which a cover member 23 for restricting the oil passage is provided on the outlet side of the upper oil introduction passage 18 as shown in FIGS. You can also By restricting the oil passage by the cover member 23, it becomes possible to guide the oil more locally and accurately to the drive bearing 7, and further to the balance weight 24 provided as a counterweight on the crankshaft 8. The oil guided to the balance weight 24 is appropriately diffused as the balance weight 24 rotates. 6 and 7 conform to the first embodiment shown in FIG. 1 to FIG. 5, the same parts are denoted by the same reference numerals, and the description thereof is omitted.

  In the structure shown in FIGS. 1 to 5 or FIGS. 6 and 7, the oil separated by the oil separator 13 passes through the oil passage 17 formed in a predetermined extended shape from the oil storage chamber 15. The oil is guided to the upper side of the compressor, and is appropriately and easily returned to the portion requiring lubrication on the driving side through the upper oil introduction path 18 from there. Therefore, the oil is appropriately supplied to a portion that really needs lubrication, and the reliability and durability of the compressor 1 are improved. Further, since the oil passage 17 is directly provided in the fixed spiral body bottom plate 16, the oil passage 17 can be easily formed (for example, formed by machining), and the oil passage 17 having a desired shape can be formed with high accuracy. It is formed and the reliability of oil supply to the upper side is improved. Furthermore, since the upper oil introduction path 18 is provided with the orifice filter 21, oil having no foreign matter is supplied to the site requiring lubrication in a controlled state.

  FIG. 8 shows a scroll compressor according to the second embodiment of the present invention, and is a diagram in which the oil passage 17 from the lower side to the upper side in the embodiment shown in FIGS. 1 to 7 is omitted. It is shown. In the present invention, the oil stored in the oil storage chamber 15 can be guided to the drive side of the compressor via the lower oil introduction path 31 on the lower side of the compressor. An orifice filter 32 is also preferably provided in the lower oil introduction path 31. By guiding the oil to the drive side of the compressor via the lower oil introduction path 31, it is possible to supply the oil to the site requiring lubrication more accurately and over a wider range. Since the other configuration in FIG. 8 conforms to the first embodiment shown in FIG. 1, the same portions are denoted by the same reference numerals and the description thereof is omitted.

  9 and 10 show a scroll compressor according to a modification of the second embodiment, and a structure in which a cover member 33 for regulating the oil passage is provided on the outlet side of the lower oil introduction passage 31 is shown. Has been. By restricting the oil passage by the cover member 33, it becomes possible to guide the oil more locally and accurately to the drive bearing 7 and further to the balance weight 34 provided as a counterweight on the crankshaft 8. The oil guided to the balance weight 34 is appropriately diffused as the balance weight 34 rotates.

  11 to 13 show a scroll compressor according to a third embodiment of the present invention, and in particular, an example of a scroll compressor incorporating a chamber type oil separator. In FIG. 11, reference numeral 41 denotes an entire scroll compressor. The scroll compressor 41 includes a fixed spiral body 42 and a movable spiral that swirls in a state where rotation is prevented with respect to the fixed spiral body 42. A compression mechanism 44 that engages the body 43 is incorporated. In this embodiment, the movable spiral body 43 is driven by a motor 45 built in the compressor 41 and is prevented from rotating via a ball coupling 46 via a drive bearing 47 and a crankshaft 48 (drive shaft). It is designed to turn.

  As shown in FIGS. 12 and 13, a discharge chamber 49 is formed on the anti-compression mechanism 44 side of the fixed spiral body 42, and the fluid compressed by the compression mechanism 44 (for example, Refrigerant) is introduced from the discharge hole 50 through the discharge valve 51. The opening degree of the discharge valve 51 is regulated by a retainer 52. In this embodiment, a chamber type oil separator 53 is built in a casing 54 (cylinder head), and a part of the discharge chamber 49 is configured as the chamber type oil separator 53. Since the chamber-type oil separator 53 is used, the axial dimension of the compressor in this portion is suppressed to be smaller than that in the first embodiment, and the axial dimension of the entire compressor is also particularly small. An oil storage chamber 55 in which oil separated from the fluid to be compressed by the oil separator 53 is stored below the oil separator 53 in the casing 54.

  The bottom plate 56 of the fixed spiral body 42 is provided with an oil passage 57 that guides oil from the oil storage chamber 55 to the compressor upper side. In the present embodiment, a groove-shaped oil passage 57 extending to the upper side over a half circumference is formed on the surface of the fixed spiral body bottom plate 56 on the anti-compression mechanism 44 side, and the fixed spiral body 42 and the casing 54 are separated from each other. As a result of the assembly, a predetermined oil passage 57 is formed at the mating surface portion between the fixed spiral body 42 and the casing 54. The oil guided to the upper side of the compressor through the conveying oil passage 57 passes through the upper oil introduction passage 58 on the upper side of the compressor, and requires lubrication on the drive side of the compressor, particularly the motor 45 side and the drive bearing 47. To be guided to. For the motor 45, the introduced oil also has a cooling function. The upper oil introduction path 58 is provided with an orifice filter 61 including a filter part 59 for capturing and removing foreign matter and an orifice part 60 having a narrow inner diameter. In this embodiment, the oil guided to the drive side of the compressor is supplied to the motor 45 side and the drive bearing 47 through a relatively wide space 62 in a spraying manner.

  The oil introduction portion to the compressor drive side has a structure in which a cover member 63 for restricting the oil passage is provided on the outlet side of the upper oil introduction passage 58, as shown in FIGS. You can also By restricting the oil passage by the cover member 63, it becomes possible to guide the oil more locally and accurately to the drive bearing 47 and further to the balance weight 64 provided as a counterweight on the crankshaft 48. The oil guided to the balance weight 64 is appropriately diffused as the balance weight 64 rotates.

  In the structure shown in FIGS. 11 to 13 or FIGS. 14 and 15, the oil separated by the oil separator 53 is extended from the oil storage chamber 55 by a predetermined extension, although it is the chamber type oil separator 53. The oil is efficiently guided to the upper side of the compressor through the oil passage 57 formed in the shape, and is appropriately and easily returned to the portion requiring lubrication on the drive side through the upper oil introduction passage 58 therefrom. Therefore, oil is appropriately supplied to a portion that really needs lubrication, and the reliability and durability of the compressor 41 are improved. Further, since the oil passage 57 is provided directly on the fixed spiral body bottom plate 56, the oil passage 57 can be easily formed (for example, formed by machining), and the oil passage 57 having a desired shape can be formed with high accuracy. It is formed and the reliability of oil supply to the upper side is improved. Furthermore, since the upper oil introduction path 58 is provided with the orifice filter 61, the oil without foreign matter is supplied to the site requiring lubrication in a controlled state.

  FIG. 16 shows a scroll compressor according to the fourth embodiment of the present invention, and is a diagram in which the oil passage 57 from the lower side to the upper side in the embodiment shown in FIGS. 11 to 15 is omitted. It is shown. In the present invention, the oil stored in the oil storage chamber 55 can be guided to the drive side of the compressor via the lower oil introduction path 71 on the lower side of the compressor. It is preferable to provide an orifice filter 72 also in the lower oil introduction path 71. By guiding the oil to the drive side of the compressor via the lower oil introduction path 71, it becomes possible to supply the oil to the site requiring lubrication more accurately and over a wider range. Since the other configuration in FIG. 16 conforms to the third embodiment shown in FIG. 11, the same portions are denoted by the same reference numerals and the description thereof is omitted.

  17 and 18 show a scroll compressor according to a modification of the fourth embodiment, and a structure in which a cover member 73 for regulating the oil passage is provided on the outlet side of the lower oil introduction passage 71 and Has been. By restricting the oil passage by the cover member 73, it becomes possible to guide the oil more locally and accurately to the drive bearing 47 and further to the balance weight 74 provided as a counterweight on the crankshaft 48. The oil guided to the balance weight 74 is appropriately diffused as the balance weight 74 rotates.

  1, 6, 8, 9, 11, 14, 16, and 17, the lines BB, CC, and DD in FIG. It is a cross-sectional display line.

  In the present invention, various forms can be adopted in configuring a chamber-type oil separator. For example, in the scroll compressor shown in FIG. 16, a cross-sectional view taken along the line BB of FIG. 16 is shown in FIG. 19, and a cross-sectional view taken along the line CC is shown in FIG. The chamber type oil separator is formed by a space between the fixed spiral body bottom plate and the casing, and the discharge chamber or a part thereof is configured as a chamber type oil separator.

  In the example shown in FIGS. 19 and 20, the space between the fixed spiral body bottom plate and the casing is partitioned into three rooms 81, 82, 83, and the three rooms 81, 82, 83 are at least one place. (Communication part 84). The central chamber 81 in the vertical direction mainly functions as a chamber-type oil separator (hereinafter also referred to as an oil separator 81), and the lower chamber 82 functions mainly as an oil storage chamber (hereinafter also referred to as an oil storage chamber 82). This room 83 (or passage) functions as a chamber mainly connected to the discharge port 85. Since the chamber 83 on the upper side can also be formed in a passage structure, the space between the fixed spiral body bottom plate and the casing is partitioned into two chambers and a passage connected to the discharge port is provided. It is also possible to adopt a structure in which the passage is communicated with at least one place.

  Further, as shown in the figure, the oil storage chamber 82 and the discharge port 85 may be connected by at least two passages 83 and 86. By providing at least two passages 83 and 86, in addition to the gas from which the oil has been separated by the oil separator 81, some of the gas that has flowed into the oil storage chamber 82 smoothly reaches the discharge port 85. Thus, the gas from which the oil has been separated can flow out of the discharge port 85 more easily and smoothly.

  Further, when at least a part of the discharge chamber is configured as the chamber-type oil separator 81 as described above, the passage cross-sectional area at the outlet portion (the portion 87 in FIG. 19) of the oil separator 81 is reduced to the oil separator 81. It is preferably set to 20 to 50% of the passage cross-sectional area in the arrangement portion of the discharge hole 50 from the compression mechanism that forms the inlet portion (part 88 in FIG. 19). That is, it is preferable that the oil separator outlet 87 has a structure in which the passage cross-sectional area is appropriately reduced. By adopting such an appropriately narrowed structure, it is possible to obtain an extremely high separation capability even though the chamber type oil separator 81 is used. In this structure, as shown in the figure, the outlet 87 of the oil separator 81 can be positioned at the rear end of the retainer 52 provided for regulating the discharge valve. Can be applied to the desired restriction of the passage cross-sectional area as described above.

  Further, when providing at least two passages as described above, at least one of the at least two passages (passage 86 in the illustrated example) has a width of 10 mm or less extending in the circumferential direction of the fixed spiral body bottom plate. Preferably it consists of. If the passage width is too large, there is a high possibility that unseparated oil will flow out from the oil storage chamber 82 to the discharge port 85 side through the passage 86. Therefore, it is preferable to keep the width to 10 mm or less.

  Thus, when a chamber-type oil separator is employed, various devices can be added in terms of configuration. Accordingly, it is possible to obtain a sufficiently high separation capability even with a chamber type oil separator while reducing the size and cost of the compressor, which are the advantages of adopting a chamber type oil separator.

  In the present invention, the compressor can be miniaturized by adding special devices to the orifice filter provided in each of the above embodiments. That is, as shown in FIGS. 21 to 23, it is possible to use an orifice filter 93 in which an oil inflow side filter portion 91 and an oil outflow side orifice portion 92 are arranged at eccentric positions. Incidentally, the conventional general orifice filter is an orifice filter 103 in which the filter portion 101 and the orifice portion 102 are arranged concentrically as shown in FIGS.

  By providing the eccentric orifice filter 93 as described above in at least one of the upper oil introduction path and the lower oil introduction path, it is possible to effectively reduce the size of the compressor while having a structure in which the orifice filter is provided. It becomes possible. For example, as shown in an example in which an eccentric orifice filter 93 is provided in the lower oil introduction passage 31 in FIG. 24, the center of the filter portion 91 is arranged closer to the compressor center than the center of the orifice portion 92. This makes it possible to efficiently downsize the compressor particularly in the radial direction without impairing the oil inflow performance from the oil storage chamber 9.

  The structure of the scroll type compressor according to the present invention can be applied to any scroll type compressor incorporating an oil separator, and is particularly used for a refrigeration cycle for a vehicle air conditioner or a showcase for which miniaturization and cost reduction are severe. Suitable for scroll type compressor.

1 is a longitudinal sectional view of a scroll compressor according to a first embodiment of the present invention. It is a cross-sectional view of the scroll type compressor which follows the CC line of FIG. It is a cross-sectional view of the scroll compressor which follows the DD line of FIG. It is a fragmentary longitudinal cross-sectional view of the scroll compressor which follows the EE line of FIG. It is a cross-sectional view of the scroll type compressor which follows the BB line of FIG. It is a longitudinal cross-sectional view of the scroll compressor which concerns on the modification of FIG. It is a cross-sectional view of the scroll type compressor which follows the BB line of FIG. It is a longitudinal cross-sectional view of the scroll compressor which concerns on the 2nd embodiment of this invention. It is a longitudinal cross-sectional view of the scroll compressor which concerns on the modification of FIG. FIG. 10 is a cross-sectional view of the scroll compressor taken along line B-B in FIG. 9. It is a longitudinal cross-sectional view of the scroll compressor which concerns on the 3rd embodiment of this invention. It is a cross-sectional view of the scroll type compressor which follows the CC line of FIG. It is a cross-sectional view of the scroll type compressor along the DD line of FIG. It is a longitudinal cross-sectional view of the scroll compressor which concerns on the modification of FIG. It is a cross-sectional view of the scroll type compressor which follows the BB line of FIG. It is a longitudinal cross-sectional view of the scroll compressor which concerns on the 4th embodiment of this invention. It is a longitudinal cross-sectional view of the scroll compressor which concerns on the modification of FIG. FIG. 18 is a cross-sectional view of the scroll compressor taken along line BB in FIG. 17. It is a cross-sectional view of a scroll compressor showing an example of the structure of a chamber type oil separator in the present invention. FIG. 20 is a cross-sectional view of the scroll compressor when the structure of FIG. 19 is viewed from the casing side. It is a front view which shows an example of an eccentric orifice filter. It is a bottom view of the orifice filter of FIG. It is a perspective view of the orifice filter of FIG. It is a longitudinal cross-sectional view of the scroll compressor which shows the usage example of the orifice filter of FIG. It is a front view which shows an example of the conventional general orifice filter. It is a bottom view of the orifice filter of FIG. It is a perspective view of the orifice filter of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 41 Scroll type compressor 2, 42 Fixed spiral body 3, 43 Movable spiral body 4, 44 Compression mechanism 5, 45 Motor 6, 46 Ball coupling 7, 47 Drive bearing 8, 48 Crank shaft (drive shaft)
9, 49 Discharge chamber 10, 50 Discharge hole 11, 51 Discharge valve 12, 52 Retainer 13 Centrifugal oil separator 14, 54 Casing 15, 55 Oil storage chamber 16, 56 Fixed spiral body bottom plate 17, 57 Oil passage 18, 58 Upper oil introduction path 19, 59, 91 Filter part 20, 60, 92 Orifice part 21, 61, 93 Orifice filter 22, 62 Space 23, 63 Cover member 24, 64 Balance weight 31, 71 Lower oil introduction path 32, 72 Orifice filter 33, 73 Cover member 34, 74 Balance weight 81 Room (oil separator)
82 rooms (oil storage room)
83 rooms (passage)
84 Communication Port 85 Discharge Port 86 Passage 87 Oil Separator Outlet 88 Oil Separator Inlet

Claims (15)

The oil separated from the fluid to be compressed by the oil separator is stored in the fixed spiral body bottom plate of the scroll compressor with a built-in oil separator. From the oil storage chamber located on the lower side of the compressor when viewed in the vertical direction, An oil passage that guides the oil ,
An upper oil introduction path that guides oil guided to the compressor upper side by the conveying oil path to the compressor drive side on the compressor upper side, or oil stored in the oil storage chamber on the compressor lower side At least a lower oil introduction path leading to the drive side of
At least one of the upper oil introduction passage and the lower oil introduction passage is provided with an orifice filter having a filter portion on the oil inflow side and an orifice portion on the oil outflow side, and the filter portion and the orifice portion of the orifice filter are mutually connected. A scroll compressor characterized by being arranged at an eccentric position . The scroll compressor according to claim 1 , wherein the center of the filter portion is disposed at a position closer to the center of the compressor than the center of the orifice portion. The scroll type compressor according to claim 1 or 2 , wherein a drive source of the compressor includes a built-in motor, and the oil guided by the upper oil introduction path is guided to the motor side. The scroll compressor according to any one of claims 1 to 3 , wherein a cover member for regulating the oil passage is provided in an oil passage formed on the motor side. The scroll compressor according to any one of claims 1 to 4, wherein the oil passage is formed in a mating surface portion between the fixed spiral body bottom plate and the casing. The scroll compressor according to any one of claims 1 to 5 , wherein the oil separator is a centrifugal oil separator. The said oil separator consists of a chamber-type oil separator which isolate | separates oil from an oil containing compressed fluid by decelerating the flow rate of the oil containing compressed fluid introduced into the chamber . The scroll compressor described in 1. The scroll compressor incorporates a chamber-type oil separator that separates oil from the oil-containing compressed fluid by reducing the flow rate of the oil-containing compressed fluid that has been introduced into the chamber. the provided oil storage chamber for storing the oil was,
At least a part of the discharge chamber is configured as a chamber-type oil separator, and the passage cross-sectional area at the outlet portion of the oil separator has a passage cut-off at the discharge hole arrangement portion from the compression mechanism that forms the inlet portion to the oil separator. A scroll compressor characterized in that it is set to 20 to 50% of the area, and an outlet portion of an oil separator is located at a rear end portion of a retainer provided for regulating a discharge valve . The scroll compressor according to claim 8 , wherein the chamber-type oil separator is formed by a space between a fixed spiral body bottom plate and a casing. The scroll compressor according to claim 9 , wherein a space between the fixed spiral body bottom plate and the casing is partitioned into three rooms, and the three rooms communicate with each other at least at one place. The space between the fixed spiral body bottom plate and the casing is divided into two chambers, and a passage connected to the discharge port is provided, and the two chambers and the passage communicate with each other at at least one point. 9. A scroll compressor according to 9 . The scroll compressor according to any one of claims 8 to 11 , wherein the oil storage chamber and the discharge port are connected by at least two passages. The scroll compressor according to claim 12 , wherein at least one of the at least two passages includes a passage having a width of 10 mm or less extending in a circumferential direction of the fixed spiral body bottom plate. The scroll compressor according to any one of claims 1 to 13 , further comprising a lower oil introduction path that guides the oil stored in the oil storage chamber to the drive side of the compressor on the lower side of the compressor. The scroll compressor according to claim 14 , wherein the lower oil introduction path is extended to a balance weight installation site provided on the movable spiral body drive side.

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