US20140223954A1 - Cryogenic refrigerator system and oil separator - Google Patents
Cryogenic refrigerator system and oil separator Download PDFInfo
- Publication number
- US20140223954A1 US20140223954A1 US14/169,468 US201414169468A US2014223954A1 US 20140223954 A1 US20140223954 A1 US 20140223954A1 US 201414169468 A US201414169468 A US 201414169468A US 2014223954 A1 US2014223954 A1 US 2014223954A1
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- United States
- Prior art keywords
- oil
- punching plate
- holes
- flow channel
- filter member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000004080 punching Methods 0.000 claims abstract description 94
- 239000003507 refrigerant Substances 0.000 claims abstract description 34
- 230000004048 modification Effects 0.000 description 17
- 238000012986 modification Methods 0.000 description 17
- 238000001816 cooling Methods 0.000 description 7
- 238000003860 storage Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 230000005587 bubbling Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000014443 Pyrus communis Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/027—Compressor control by controlling pressure
- F25B2600/0271—Compressor control by controlling pressure the discharge pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2501—Bypass valves
Definitions
- the invention relates to an oil separator having a filter element for trapping oil included in a refrigerant gas, and a cryogenic refrigerator system to which the oil separator is applied.
- a cryogenic refrigerator system including a compressor that boosts a refrigerant gas; an oil separator that separates oil from the boosted refrigerant gas; and a cryogenic refrigerator that expands the refrigerant gas discharged from the oil separator.
- the oil separator includes a container; an inlet pipe that is arranged at an upper portion of the container and introduces the refrigerant gas; a filter member that is arranged between an inner punching plate having inner through-holes and an outer punching plate having outer through-holes; an outlet pipe that is arranged at the upper portion of the container outside the filter member and allows the refrigerant gas passed through the filter member to be discharged therethrough; a discharge port that is arranged at a lower portion of the container and allows the oil separated by the filter member to be discharged therethrough; and an auxiliary flow channel that is provided outside the outer punching plate and guides the separated oil to the discharge port.
- FIG. 1 is a configuration view illustratively showing a compressor to which an oil separator that is an embodiment of the invention is applied.
- FIG. 2 is a partial cross-sectional view of the oil separator that is the embodiment of the invention.
- FIGS. 3A and 3B show a filter element internally provided in the oil separator that is the embodiment of the invention; FIG. 3A is a longitudinal sectional view and FIG. 3B is an A-A cross-sectional view in FIG. 3A .
- FIG. 4 is a view for describing the flow of leak oil in the oil separator that is the embodiment of the invention.
- FIG. 5 is a view for describing the arrangement position of an auxiliary flow channel plate on an outer punching plate.
- FIG. 6 is a cross-sectional view showing a filter element internally provided in a first modification example of the oil separator that is the embodiment of the invention.
- FIG. 7 is a cross-sectional view showing a filter element internally provided in a second modification example of the oil separator that is the embodiment of the invention.
- FIG. 8 is a partial cross-sectional view for describing a third modification example of the oil separator that is the embodiment of the invention.
- FIG. 9 is a partial cross-sectional view of a filter element internally provided in an oil separator that is another embodiment of the invention.
- FIG. 10 is a cross-sectional enlarged view showing a portion illustrated using arrow B of FIG. 9 .
- FIG. 11 is a partial cross-sectional view of a filter element internally provided in an oil separator that is a still another embodiment of the invention.
- FIGS. 12A and 12B are views showing outer through-holes of the oil separator that are the still another embodiment of the invention.
- FIG. 12A is a view showing a formation state of the outer through-holes formed within a range shown by arrow UP in FIG. 11
- FIG. 12B is a view showing a formation state of the outer through-holes formed within a range shown by arrow LO in FIG. 11 .
- a filter member is provided within a cell.
- the oil is separated when the refrigerant gas passes through this filter member. However, if the separated oil is scattered to the downstream side of the filter member, the oil may become mixed-in again to the refrigerant gas.
- oil can be prevented from being mixed-in to a refrigerant gas.
- FIG. 1 shows a compressor 10 (hereinafter referred to as a compressor) for a cooling storage type refrigerator that is an embodiment of the invention.
- the compressor 10 is connected to a GM refrigerator 30 by a supply pipe 22 and a return pipe 23 .
- the compressor 10 boosts a low-pressure refrigerant gas (this refrigerant gas is referred to as a return gas) returned via the return pipe 23 from the GM refrigerator 30 by the compressor body 11 , and supplies the boosted return gas again to the GM refrigerator 30 via the supply pipe 22 as a supply gas.
- the compressor 10 is generally constituted by a compressor body 11 , a heat exchanger 12 , a high-pressure-side pipe 13 , a low-pressure side pipe 14 , an oil separator 15 , an adsorber 16 , the storage tank 17 , a bypass mechanism 18 , and the like.
- the return gas returned from the GM refrigerator 30 first flows into the storage tank 17 via the return pipe 23 .
- the function of the storage tank 17 is to remove pulsation included in the return gas.
- the return gas the pulsation of which is removed in the storage tank 17 is led out to the low-pressure side pipe 14 .
- the low-pressure side pipe 14 is connected to the compressor body 11 . Hence, the return gas the pulsation of which is removed in the storage tank 17 is supplied to the compressor body 11 .
- the compressor body 11 is, for example, a scrolling or a rotary pump, and fulfills the function of boosting the return gas (the refrigerant gas that is boosted in the compressor body 11 is referred to as the supply gas).
- the compressor body 11 delivers the boosted supply gas to a high-pressure-side pipe 13 A.
- the supply gas may be delivered to the high-pressure-side pipe 13 A in a state where oil within the compressor body 11 is slightly mixed-in to the supply gas.
- the compressor body 11 is configured to be cooled by oil.
- an oil cooling pipe 33 that allows oil to be circulated therethrough is connected to an oil heat-exchange section 26 that constitutes the heat exchanger 12 .
- the oil cooling pipe 33 is provided with an orifice 32 that controls the flow rate of oil that flows therethrough.
- the heat exchanger 12 is configured so that cooling water is circulated through a cooling water pipe 25 , and has the oil heat-exchange section 26 that performs the cooling processing of the oil that flows through the oil cooling pipe 33 , and a refrigerant gas heat-exchange section 27 that cools the supply gas.
- the oil that flows through the oil cooling pipe 33 is heat-exchanged and cooled in the oil heat-exchange section 26
- the supply gas that flows through the high-pressure-side pipe 13 A is heat-exchanged and cooled in the refrigerant gas heat-exchange section 27 .
- the supply gas boosted in the compressor body 11 and cooled in the refrigerant gas heat-exchange section 27 is supplied to the oil separator 15 via the high-pressure-side pipe 13 A.
- the oil included in the supply gas is separated from the refrigerant gas, and impurities and dust included in the oil are also removed.
- a detailed configuration of the oil separator 15 will be described below.
- the supply gas of which the oil is removed in the oil separator 15 is sent to the adsorber 16 via a high-pressure-side pipe 13 B.
- the adsorber 16 fulfills the function of removing, particularly, an evaporated oil component included in the supply gas. After the evaporated oil component of the supply gas is removed in the adsorber 16 , the supply gas is supplied to the GM refrigerator 30 via the supply pipe 22 .
- the bypass mechanism 18 is constituted by a bypass pipe 19 , a high-pressure-side pressure detecting device 20 , and a bypass valve 21 .
- the bypass pipe 19 is a pipe that allows a high-pressure side, to which the supply gas of the compressor 10 flows, to communicate with a low-pressure side to which the return gas flows.
- the high-pressure-side pressure detecting device 20 detects the pressure of the supply gas within the high-pressure-side pipe 13 A.
- the bypass valve 21 is an electric valve gear that opens and closes the bypass pipe 19 . Although the bypass valve 21 is a normally-closed valve, the bypass valve is controlled by the high-pressure-side pressure detecting device 20 .
- the bypass valve 21 is driven and opened by the high-pressure-side pressure detecting device 20 . This prevents the supply gas of the predetermined pressure or higher to be supplied to the refrigerator 30 .
- FIG. 2 is a cross-sectional view showing the oil separator 15 that is the embodiment of the invention
- FIG. 3 is a schematic configuration view showing a filter element 36 A internally provided in the oil separator 15 .
- the oil separator 15 is generally constituted by a shell 35 and the filter element 36 A.
- the left half of the filter element 36 A with respect to a centerline is shown in section in FIG. 2
- the right half of the filter element 36 A with respect to the centerline is shown in section in FIG. 3 .
- the oil separator 15 has the shell 35 and the filter element 36 A.
- the shell 35 is constituted by a cylindrical portion 35 A, an upper flange 35 B, a bottom portion 35 C, and the like.
- the cylindrical portion 35 A is formed in a hollow tubular shape.
- the bottom portion 35 C is fixed to and is airtightly closed by a lower end portion of the cylindrical portion 35 A by welding or the like.
- the upper flange 35 B is fixed to an upper end portion of the cylindrical portion 35 A by welding or the like, and the upper end portion is also airtightly closed.
- a high-pressure gas introduction pipe 15 A, a high-pressure gas lead-out pipe 15 B, and an oil returning pipe 15 C are arranged at the upper flange 35 B.
- the high-pressure gas introduction pipe 15 A is connected to the high-pressure-side pipe 13 A. Hence, the supply gas boosted in the compressor body 11 is introduced into an inner space formed inside an inner punching plate 41 .
- the high-pressure gas lead-out pipe 15 B is connected to the high-pressure-side pipe 13 B.
- the high-pressure-side pipe 13 B is a pipe that connects the oil separator 15 and the adsorber 16 .
- an oil return port is connected to an upper end portion of the oil returning pipe 15 C.
- an introduction opening 56 provided at a lower end portion of the oil returning pipe 15 C opens in the vicinity of a bottom portion of the oil separator 15 .
- the oil return port is connected to the oil return pipe 24 .
- the oil return pipe 24 has a high-pressure side connected to the oil separator 15 and a low-pressure side connected to the low-pressure side pipe 14 . Additionally, a filter 43 that removes the dust included in the oil separated by the oil separator 15 and an orifice 31 that controls the return amount of oil are provided in the middle of the oil return pipe 24 .
- the filter element 36 A is constituted by the high-pressure gas introduction pipe 15 A, a filter member 37 , an upper lid body 38 , a lower lid body 39 , and an outer punching plate 40 A, the inner punching plate 41 , and the like.
- the filter member 37 has, for example, the structure in which glass wool is wound around the core of the inner punching plate 41 and the outer punching plate 40 A is arranged at an outermost peripheral portion of the filter member. Hence, the filter member 37 is configured so as to be arranged between the inner punching plate 41 and the outer punching plate 40 A.
- the upper lid body 38 is fixed to an upper end portion of the filter member 37 by using an adhesive (not shown), and the lower lid body 39 is fixed to a lower end portion of the filter member by using an adhesive.
- the filter member 37 , the upper lid body 38 , the lower lid body 39 , the outer punching plate 40 A, and the inner punching plate 41 have an integral configuration.
- the filter member 37 is fixed to the high-pressure gas introduction pipe 15 A by welding the upper lid body 38 to the high-pressure gas introduction pipe 15 A.
- Both the outer punching plate 40 A arranged outside the filter member 37 and the inner punching plate 41 arranged inside the filter member 37 have a tubular shape. Additionally, outer through-holes 50 A are formed in the outer punching plate 40 A, and inner through-holes 51 are formed in the inner punching plate 41 .
- the respective through-holes 50 A and 51 has a circular shape, and the supply gas (refrigerant gas) introduced into the filter element 36 A from the high-pressure gas introduction pipe 15 A is introduced into the filter member 37 through the inner through-holes 51 formed in the inner punching plate 41 .
- the supply gas advances inside the filter member 37 , the oil included in the supply gas is removed by the filter member 37 . Additionally, the supply gas the oil of which is removed by the filter member 37 is discharged to the outside (the interior of the shell 35 ) of the filter member 37 through the outer through-holes 50 A of the outer punching plate 40 A.
- leak oil 60 when the supply gas advances inside the filter member 37 from the inner punching plate 41 toward the outer punching plate 40 A, the oil included in the supply gas is removed by the filter member 37 .
- the filter member 37 when the supply gas includes a large amount of oil, the filter member 37 is not able to hold oil. As a result, a portion of oil may leak to a surface 44 of the outer punching plate 40 A through the outer through-holes 50 A (hereinafter, the oil leaked through the outer through-holes 50 A is referred to as leak oil 60 ).
- the leak oil 60 is dropped on the bottom portion 35 C of the shell 35 from the filter element 36 A and is reserved at a lower portion of the shell 35 . Then, the leak oil 60 reserved at the lower portion of the shell 35 is returned to the compressor body 11 via the oil returning pipe 15 C, the oil return pipe 24 , and the low-pressure side pipe 14 .
- the distribution of oil within the filter member 37 is shown by pear skin in FIG. 3A .
- the oil trapped in the filter member 37 moves downward due to gravity.
- the oil increases gradually toward a lower portion of the filter member.
- the leak oil 60 leaked through the outer through-holes 50 A of the outer punching plate 40 A also increases compared to the leak oil 60 leaked through an upper portion of the outer punching plate 40 A.
- the leak oil 60 When the leak oil 60 leaked on the surface of the outer punching plate 40 A through the outer through-holes 50 A flows into other outer through-holes 50 A, the leak oil 60 forms an oil film so as to block the outer through-holes 50 A. Since refrigerant gas flows out from the inside toward the outside through the outer through-holes 50 A, the oil film of the leak oil 60 will be splashed and scattered by this refrigerant gas if the oil film of the leak oil 60 is formed in the outer through-holes 50 A (this phenomenon is referred to as bubbling).
- the leak oil 60 may again be mixed-in to the supply gas the oil of which is removed by the filter member 37 .
- the oil separator 15 related to an embodiment provides an auxiliary flow channel plate 45 A on the surface of the outer punching plate 40 A.
- the auxiliary flow channel plate 45 A is a thin-plate-shaped member having a rectangular shape (an elongated rectangular shape in the longitudinal direction of the outer punching plate 40 A).
- the auxiliary flow channel plate 45 A is fixed to an outer peripheral surface of the outer punching plate 40 A by a well-known fixing method, such as welding.
- the auxiliary flow channel plate 45 A is arranged so as to extend along the longitudinal direction (up-and-down direction in FIGS. 2 and 3A )] of the outer punching plate 40 A.
- the auxiliary flow channel plate 45 A may be formed over the entire length of the outer punching plate 40 A in the longitudinal direction. Additionally, a plurality of (twelve in the present embodiment) the auxiliary flow channel plates 45 A are also received, and the respective auxiliary flow channel plate 45 A may be arranged so as to extend radially from the surface of the outer punching plate 40 A toward the outside, as shown in FIG. 3B .
- the arrangement positions of the auxiliary flow channel plates 45 A on the outer punching plate 40 A do not need to exclude the arrangement positions of the outer through-holes 50 A.
- the auxiliary flow channel plates 45 A may be arranged so as to straddle the outer through-holes 50 A.
- the auxiliary flow channel plates 45 A may be arranged so as to straddle only one outer through-hole 50 A and or may be arranged so as to straddle two or more outer through-holes 50 A.
- the auxiliary flow channel plates 45 A are simple plates having a rectangular shape, the auxiliary flow channel plates can be easily manufactured. Additionally, the auxiliary flow channel plates 45 A can be fixed to the outer punching plate 40 A by using a well-known technique, such as welding. Hence, the auxiliary flow channel plates 45 A can be easily arranged at the outer punching plate 40 A at low costs.
- FIG. 4 is a cross-sectional enlarged view illustrating the vicinities of the positions of the outer punching plate 40 A and the auxiliary flow channel plate 45 A where the outer through-holes 50 A are formed.
- the left side in the drawing is the inner side of the filter element 36 A
- the right side is the outer side of the filter element 36 A.
- the filter member 37 no longer holds the oil, and a portion of the oil leaks to the surface 44 of the outer punching plate 40 A through the outer through-holes 50 A as the leak oil 60 .
- the leak oil 60 may re-flow back to the outer through-holes 50 A and thus, the bubbling may occur.
- the oil separator 15 related to the present embodiment protrudes from the outer surface of the outer punching plate 40 A, and is provided so that the auxiliary flow channel plate 45 A extends in the longitudinal direction of the auxiliary flow channel plate 45 A, that is, in the flow direction of the leak oil 60 . Additionally, the auxiliary flow channel plate 45 A is provided in the vicinities of the outer through-holes 50 A, and the portion of the auxiliary flow channel plate 45 A that is formed over the outer through-holes 50 A is also present.
- the leak oil 60 that has flowed out of the outer through-holes 50 A is prevented from flowing again into the other outer through-holes 50 . Therefore, the occurrence of bubbling can be suppressed, and accordingly, the leak oil 60 can be prevented from being again mixed-in to the supply gas.
- a dropping portion 47 may be provided at a lower end portion of the auxiliary flow channel plate 45 A.
- the dropping portion 47 is formed so as to become gradually narrow from the inner side to the outer side.
- the dropping portion 47 has a triangular shape when viewed from a side surface.
- the leak oil 60 that has flowed on the auxiliary flow channel plate 45 A is dropped on the bottom portion 35 C of the shell 35 from a tip portion (pointed portion) of the dropping portion 47 at a position apart from the surface of the auxiliary flow channel plate 45 A.
- the leak oil 60 on the auxiliary flow channel plate 45 A is also returned again to the surface of the outer punching plate 40 A.
- the leak oil 60 can be prevented from being again mixed-in to the supply gas.
- FIGS. 6 to 8 show first to the third modification examples of the oil separator 15 related to the embodiment.
- FIG. 6 shows a filter element 36 B provided at an oil separator that is a first modification example.
- the auxiliary flow channel plate 45 B is arranged at least below a middle position of the outer punching plate 40 A in the longitudinal direction. That is, if the length of the auxiliary flow channel plate 45 B in the longitudinal direction is defined as L1 and the length of the outer punching plate 40 A in the longitudinal direction is defined as L2, L1 ⁇ L2 is established, and the auxiliary flow channel plate is provided within a range from the lower end portion of the outer punching plate 40 A to a dimension (L2/2).
- the distribution of the oil within the filter member 37 increases toward the lower portion of the filter member, and the leak oil 60 leaked through the outer through-holes 50 A of the outer punching plate 40 A becomes heavier at a lower portion of the outer punching plate 40 A than at an upper portion of the outer punching plate.
- the present embodiment has a configuration in which the auxiliary flow channel plate 45 B is arranged only below the middle position, in the longitudinal direction, of the outer punching plate 40 A where the amount of leak of the leak oil 60 through the outer through-holes 50 A is larger. According to the configuration of the present modification example, stripping processing of the leak oil 60 from the outer punching plate 40 A can be efficiently performed, and miniaturization of the auxiliary flow channel plate 45 B can be achieved.
- FIG. 7 shows a filter element 36 C provided at an oil separator that is a second modification example.
- the shape of the auxiliary flow channel plate 45 C is a triangular shape that becomes wider downward.
- the amount of the leak oil 60 leaked through the outer through-holes 50 A of the outer punching plate 40 A is larger at the lower portion of the outer punching plate. Hence, the amount of the leak oil 60 that flows on the outer through-holes 50 A increases toward the lower portion.
- the area of the lower portion is made larger than that of the upper portion by forming the auxiliary flow channel plate 45 C in a triangular shape that becomes wider downward.
- FIG. 8 is a cross-sectional enlarged view illustrating the vicinities of the outer through-holes 50 A of a filter element provided at an oil separator that is a third modification example.
- guide grooves 48 are formed in the auxiliary flow channel plate 45 C.
- the guide grooves 48 are formed so as to extend obliquely downward from positions near the outer through-holes 50 A formed in the outer punching plate 40 A.
- the leak oil 60 that has flowed into the guide grooves 48 flows along the shape of the guide grooves 48 . Hence, the leak oil 60 is guided by the guide grooves 48 and flows in a direction away out from the surface of the outer punching plate 40 A. As a result, even in the present modification example, the leak oil 60 that has flowed out of the outer through-holes 50 A can be prevented from flowing again into the outer punching plate 40 A and the outer through-holes 50 A. Hence, the leak oil 60 can be prevented from being again mixed-in to the supply gas the oil of which is removed by the filter member 37 .
- the extending direction of the guide grooves 48 is set so as to become about 45° downward with respect to the horizontal direction, but this angle can be appropriately changed. That is, as the angle of the guide grooves 48 with respect to the horizontal direction becomes larger, the speed at which the leak oil 60 flows through the guide grooves 48 becomes faster.
- the shape of the guide grooves 48 is a long elliptical shape in the present modification example, the shape of the guide grooves 48 is not limited to this.
- the shape of the guide grooves may be a nonlinear shape, such as an L-shape, and the width, length, and depth of the guide grooves can also be appropriately changed. It is possible to appropriately control the flow speed (the amount of flows) and flowing position of the leak oil 60 on the auxiliary flow channel plate 45 D depending on the angle with respect to the horizontal direction, width, length, depth, shape, and the like. This can also prevent the leak oil 60 that has flowed out of the outer through-holes 50 A from flowing again into the outer punching plate 40 A and the outer through-holes 50 A.
- FIGS. 9 and 10 are views for describing the oil separator that is the still another embodiment.
- this embodiment also has a feature in a filter element 36 D of the oil separator, only the filter element 36 D is shown in the respective drawings, and the illustration of the shell 35 is omitted. Additionally, even in FIGS. 9 and 10 , components corresponding to those of the first embodiment shown in FIGS. 1 to 5 will be described by the same reference numerals, and the description thereof will be omitted.
- the oil separator related to this embodiment is characterized by providing the filter element 36 D with a collar portion 49 .
- a plurality of (six in the present embodiment) the collar portions 49 are provided on the surface of the outer punching plate 40 A. Additionally, the respective collar portions 49 are provided in parallel.
- Each collar portion 49 is formed so as to surround the surface of the outer punching plate 40 A, and the shape of the collar portion in a cross-section extends further downward than the horizontal shape (see a cross-sectional portion on the left of the centerline of FIG. 9 ). Accordingly, it can be said that the collar portions 49 have an umbrella shape.
- each collar portion 49 is formed so as to cover at least one outer through-hole 50 A.
- FIG. 10 shows an enlarged portion illustrated using arrow B of FIG. 9 . As shown in this drawing, in the present embodiment, the collar portion 49 is configured to cover one outer through-hole 50 A.
- the leak oil 60 that has flowed out of the outer through-holes 50 A, as shown in FIG. 10 flows along upper surfaces of the collar portions 49 that extend obliquely downward, and is dropped at the bottom portion 35 C of the shell 35 from lower end portions of the collar portions 49 .
- the leak oil 60 that has flowed out of the outer through-holes 50 A, flows on the collar portions 49 , is stripped from the surface of the outer punching plate 40 A, and separates from the surface of the outer punching plate 40 A, as it flows on the collar portions 49 . Accordingly, even in the present embodiment, the leak oil 60 that has flowed out of the outer through-holes 50 A can be prevented from flowing again into the outer punching plate 40 A and the outer through-holes 50 A. Hence, the leak oil 60 can be prevented from being again mixed-in to the supply gas the oil of which is removed by the filter member 37 .
- the angle (shown by arrow ⁇ in FIG. 10 ) of the collar portions 49 with respect to the surface of the outer punching plate 40 A can be set to a range of 0° ⁇ 90°.
- the flow speed of the leak oil 60 on the collar portions 49 becomes slow by making this inclination angle ⁇ small, the leak oil 60 can be separated from the surface of the outer punching plate 40 A by a short length.
- the inclination angle ⁇ is made small, the flow speed of the leak oil 60 on the collar portions 49 becomes fast.
- the outer punching plate 40 A is provided with the plurality of collar portions 49 .
- FIGS. 11 and 12 are views for describing an oil separator that is a third embodiment. Additionally, FIG. 12A shows the enlarged surface of the outer punching plate 40 B of a region illustrated using arrow UP of FIG. 11 , and FIG. 12B shows the enlarged surface of the outer punching plate 40 B of a region illustrated using arrow LO of FIG. 11 .
- this embodiment also has a feature in a filter element 36 E of the oil separator, only the filter element 36 E is shown in the respective drawings, and the illustration of the shell 35 is omitted. Additionally, even in FIGS. 11 and 12 , components corresponding to those of the first embodiment shown in FIGS. 1 to 5 will be described by the same reference numerals, and the description thereof will be omitted.
- the open area ratio (the ratio of the total hole area of the outer through-holes to the total surface area of the outer punching plate 40 B) of the outer through-holes 50 B and 50 C formed in the outer punching plate 40 B of the filter element 36 E is changed at the upper portion and lower portion of the outer punching plate 40 B.
- the open area ratio of the outer through-holes 50 C arranged below (the region shown by arrow LO in FIG. 11 ) a middle position in the longitudinal direction of the outer punching plate 40 A is set to be smaller than the open area ratio of the outer through-holes 50 B arranged above (the region shown by arrow UP in FIG. 11 ) the middle position.
- the individual outer through-holes 50 B and the individual outer through-holes 50 C have the same diameter (the same area). Accordingly, the number of the formed outer through-holes 50 C arranged in the region LO (shown in FIG. 12B ) below the middle position is smaller than the number of the formed outer through-holes 50 B arranged in the region UP (shown in FIG. 12A ) above the middle position.
- the flow channel area becomes narrow in the region UP above the middle position shown in FIG. 12A .
- the flow channel area becomes wide in the region LO below the middle position shown in FIG. 12B .
- the amount of oil included in the filter member 37 is not uniform at upper and lower positions, is smaller in the region UP above the middle position, and is larger in the region UP below the middle position. For this reason, in the region UP above the middle position of the outer punching plate 40 B, the outflow amount of the supply gas is large but the outflow amount of the leak oil 60 is small. On the contrary, in the region LO below the middle position of the outer punching plate 40 B, the outflow amount of the leak oil 60 is large but the outflow amount of the supply gas is small.
- the supply gas the oil of which is removed by the filter member 37 efficiently flows out of the outer punching plate 40 B into the shell 35 through the multiple outer through-holes 50 B formed in the region UP above the middle position.
- the leak oil 60 that flows out of the outer through-holes 50 C in the lower region LO increases.
- the distance between adjacent outer through-holes 50 C is long and the flow channel of the leak oil 60 is ensured. For this reason, the leak oil 60 that has flowed out of the outer through-holes 50 C flows out downward without flowing again into the other outer through-holes 50 C (the flow of the leak oil 60 is shown by arrow in FIG. 12B ).
- the leak oil 60 that has flowed out of the outer through-holes 50 C can be prevented from flowing again into the other outer through-holes 50 C. Therefore, the leak oil 60 can be prevented from being again mixed-in to the supply gas the oil of which is removed by the filter member 37 . Additionally, since the supply gas flows outside the filter element 36 E in the upper region UP with a large open area ratio, the outflow resistance of supply gas can be made small, and efficient gas-liquid separation can be performed.
- the above-described embodiment has a configuration in which the open area ratio of the lower region LO with respect to the upper region UP is increased by making the diameters of the respective outer through-holes 50 B and 50 C be the same dimension and changing the number of the formed outer through-holes 50 B in the upper region UP and the number of arranged outer through-holes 50 C in the lower region LO.
- the open area ratio of lower region LO with respect to the upper region UP can also be increased by setting the numbers of formed through-holes in the upper region UP and the lower region LO equal to each other and changing the diameters of the outer through-holes 50 B and the outer through-holes 50 C different from each other.
- the open area ratio of the lower region LO with respect to the upper region UP can be increased evenly by making the diameter of the outer through-holes 50 C arranged in the lower region LO smaller than the diameter of the outer through-holes 50 B arranged in the upper region UP.
- the above-described embodiment has a configuration in which the outer punching plate 40 B are divided into the upper region UP and the lower region LO at the middle position, and the open area ratio is changed in the upper region UP and the lower region LO.
- a configuration may be adopted in which the number and the diameter of the outer through-holes are changed so that the open area ratio of the outer through-holes increase gradually from the upper end portion of the outer punching plate 40 B toward the lower end portion thereof.
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Abstract
Provided is an oil separator in which a filter member is arranged between inner and outer punching plates and that includes a filter element configured so that a refrigerant gas that has flowed in from an inlet pipe flows into the filter member through inner through-holes provided in the inner punching plate, and flows outside through outer through-holes provided in the outer punching plate, and a shell that houses the filter element therein and has a bottom portion that collects leak oil that has flowed out of the outer through-holes. An auxiliary flow channel plate for the leak oil is provided in the surface of the outer punching plate, and is configured so that the leak oil is discharged to the bottom portion of the shell through the auxiliary flow channel plate.
Description
- Priority is claimed to Japanese Patent Application No. 2013-026038, filed Feb. 13, 2013, the entire content of which is incorporated herein by reference.
- 1. Technical Field
- The invention relates to an oil separator having a filter element for trapping oil included in a refrigerant gas, and a cryogenic refrigerator system to which the oil separator is applied.
- 2. Description of the Related Art
- There are known apparatuses that expand a refrigerant gas boosted by a compressor in a cryogenic refrigerator to generate cooling. Among such compressors, there are compressors that use oil when the refrigerant gas is boosted. Therefore, oil may be included in the boosted refrigerant gas. Thus, the refrigerant gas boosted by the compressor is supplied to a refrigerator after being sent to an oil separator and is subjected to separation of the oil and the refrigerant gas.
- According to an embodiment of the present invention, there is provided a cryogenic refrigerator system including a compressor that boosts a refrigerant gas; an oil separator that separates oil from the boosted refrigerant gas; and a cryogenic refrigerator that expands the refrigerant gas discharged from the oil separator. The oil separator includes a container; an inlet pipe that is arranged at an upper portion of the container and introduces the refrigerant gas; a filter member that is arranged between an inner punching plate having inner through-holes and an outer punching plate having outer through-holes; an outlet pipe that is arranged at the upper portion of the container outside the filter member and allows the refrigerant gas passed through the filter member to be discharged therethrough; a discharge port that is arranged at a lower portion of the container and allows the oil separated by the filter member to be discharged therethrough; and an auxiliary flow channel that is provided outside the outer punching plate and guides the separated oil to the discharge port.
-
FIG. 1 is a configuration view illustratively showing a compressor to which an oil separator that is an embodiment of the invention is applied. -
FIG. 2 is a partial cross-sectional view of the oil separator that is the embodiment of the invention. -
FIGS. 3A and 3B show a filter element internally provided in the oil separator that is the embodiment of the invention;FIG. 3A is a longitudinal sectional view andFIG. 3B is an A-A cross-sectional view inFIG. 3A . -
FIG. 4 is a view for describing the flow of leak oil in the oil separator that is the embodiment of the invention. -
FIG. 5 is a view for describing the arrangement position of an auxiliary flow channel plate on an outer punching plate. -
FIG. 6 is a cross-sectional view showing a filter element internally provided in a first modification example of the oil separator that is the embodiment of the invention. -
FIG. 7 is a cross-sectional view showing a filter element internally provided in a second modification example of the oil separator that is the embodiment of the invention. -
FIG. 8 is a partial cross-sectional view for describing a third modification example of the oil separator that is the embodiment of the invention. -
FIG. 9 is a partial cross-sectional view of a filter element internally provided in an oil separator that is another embodiment of the invention. -
FIG. 10 is a cross-sectional enlarged view showing a portion illustrated using arrow B ofFIG. 9 . -
FIG. 11 is a partial cross-sectional view of a filter element internally provided in an oil separator that is a still another embodiment of the invention. -
FIGS. 12A and 12B are views showing outer through-holes of the oil separator that are the still another embodiment of the invention;FIG. 12A is a view showing a formation state of the outer through-holes formed within a range shown by arrow UP inFIG. 11 , andFIG. 12B is a view showing a formation state of the outer through-holes formed within a range shown by arrow LO inFIG. 11 . - In a certain oil separator, a filter member is provided within a cell. The oil is separated when the refrigerant gas passes through this filter member. However, if the separated oil is scattered to the downstream side of the filter member, the oil may become mixed-in again to the refrigerant gas.
- When the refrigerant gas including oil is supplied to the refrigerator, there is a possibility that the performance of the refrigerator may worsen. Therefore, the improvement in the separative performance of the oil separator is required.
- It is desirable to provide an oil separator that can prevent oil that is separated by a filter member from being mixed-in again to a refrigerant gas.
- According to an aspect of the invention, oil can be prevented from being mixed-in to a refrigerant gas.
- Next, certain embodiments of the invention together with drawings will be described.
-
FIG. 1 shows a compressor 10 (hereinafter referred to as a compressor) for a cooling storage type refrigerator that is an embodiment of the invention. Thecompressor 10 is connected to a GMrefrigerator 30 by asupply pipe 22 and areturn pipe 23. - The
compressor 10 boosts a low-pressure refrigerant gas (this refrigerant gas is referred to as a return gas) returned via thereturn pipe 23 from the GMrefrigerator 30 by thecompressor body 11, and supplies the boosted return gas again to the GMrefrigerator 30 via thesupply pipe 22 as a supply gas. Thecompressor 10 is generally constituted by acompressor body 11, aheat exchanger 12, a high-pressure-side pipe 13, a low-pressure side pipe 14, anoil separator 15, anadsorber 16, thestorage tank 17, abypass mechanism 18, and the like. - The return gas returned from the GM
refrigerator 30 first flows into thestorage tank 17 via thereturn pipe 23. The function of thestorage tank 17 is to remove pulsation included in the return gas. - The return gas the pulsation of which is removed in the
storage tank 17 is led out to the low-pressure side pipe 14. The low-pressure side pipe 14 is connected to thecompressor body 11. Hence, the return gas the pulsation of which is removed in thestorage tank 17 is supplied to thecompressor body 11. - The
compressor body 11 is, for example, a scrolling or a rotary pump, and fulfills the function of boosting the return gas (the refrigerant gas that is boosted in thecompressor body 11 is referred to as the supply gas). Thecompressor body 11 delivers the boosted supply gas to a high-pressure-side pipe 13A. In addition, when the supply gas is boosted in thecompressor body 11, the supply gas may be delivered to the high-pressure-side pipe 13A in a state where oil within thecompressor body 11 is slightly mixed-in to the supply gas. - Additionally, the
compressor body 11 is configured to be cooled by oil. For this reason, anoil cooling pipe 33 that allows oil to be circulated therethrough is connected to an oil heat-exchange section 26 that constitutes theheat exchanger 12. Additionally, theoil cooling pipe 33 is provided with anorifice 32 that controls the flow rate of oil that flows therethrough. - The
heat exchanger 12 is configured so that cooling water is circulated through acooling water pipe 25, and has the oil heat-exchange section 26 that performs the cooling processing of the oil that flows through theoil cooling pipe 33, and a refrigerant gas heat-exchange section 27 that cools the supply gas. The oil that flows through theoil cooling pipe 33 is heat-exchanged and cooled in the oil heat-exchange section 26, and the supply gas that flows through the high-pressure-side pipe 13A is heat-exchanged and cooled in the refrigerant gas heat-exchange section 27. - The supply gas boosted in the
compressor body 11 and cooled in the refrigerant gas heat-exchange section 27 is supplied to theoil separator 15 via the high-pressure-side pipe 13A. In theoil separator 15, the oil included in the supply gas is separated from the refrigerant gas, and impurities and dust included in the oil are also removed. In addition, for convenience, a detailed configuration of theoil separator 15 will be described below. - The supply gas of which the oil is removed in the
oil separator 15 is sent to theadsorber 16 via a high-pressure-side pipe 13B. Theadsorber 16 fulfills the function of removing, particularly, an evaporated oil component included in the supply gas. After the evaporated oil component of the supply gas is removed in theadsorber 16, the supply gas is supplied to theGM refrigerator 30 via thesupply pipe 22. - The
bypass mechanism 18 is constituted by abypass pipe 19, a high-pressure-sidepressure detecting device 20, and abypass valve 21. Thebypass pipe 19 is a pipe that allows a high-pressure side, to which the supply gas of thecompressor 10 flows, to communicate with a low-pressure side to which the return gas flows. The high-pressure-sidepressure detecting device 20 detects the pressure of the supply gas within the high-pressure-side pipe 13A. Thebypass valve 21 is an electric valve gear that opens and closes thebypass pipe 19. Although thebypass valve 21 is a normally-closed valve, the bypass valve is controlled by the high-pressure-sidepressure detecting device 20. - Specifically, when the high-pressure-side
pressure detecting device 20 has detected that the pressure (that is, the pressure within the high-pressure-side pipe 13A) of the supply gas from thecompressor body 11 to theoil separator 15 becomes equal to or higher than a predetermined pressure, thebypass valve 21 is driven and opened by the high-pressure-sidepressure detecting device 20. This prevents the supply gas of the predetermined pressure or higher to be supplied to therefrigerator 30. - Subsequently, the
oil separator 15 will be described. -
FIG. 2 is a cross-sectional view showing theoil separator 15 that is the embodiment of the invention, andFIG. 3 is a schematic configuration view showing afilter element 36A internally provided in theoil separator 15. Theoil separator 15 is generally constituted by ashell 35 and thefilter element 36A. - In addition, the left half of the
filter element 36A with respect to a centerline is shown in section inFIG. 2 , and the right half of thefilter element 36A with respect to the centerline is shown in section inFIG. 3 . - Subsequently, the
oil separator 15 will be described. - The
oil separator 15 has theshell 35 and thefilter element 36A. - The
shell 35 is constituted by acylindrical portion 35A, anupper flange 35B, abottom portion 35C, and the like. Thecylindrical portion 35A is formed in a hollow tubular shape. Thebottom portion 35C is fixed to and is airtightly closed by a lower end portion of thecylindrical portion 35A by welding or the like. Additionally, theupper flange 35B is fixed to an upper end portion of thecylindrical portion 35A by welding or the like, and the upper end portion is also airtightly closed. - A high-pressure
gas introduction pipe 15A, a high-pressure gas lead-outpipe 15B, and anoil returning pipe 15C are arranged at theupper flange 35B. The high-pressuregas introduction pipe 15A is connected to the high-pressure-side pipe 13A. Hence, the supply gas boosted in thecompressor body 11 is introduced into an inner space formed inside aninner punching plate 41. - The high-pressure gas lead-out
pipe 15B is connected to the high-pressure-side pipe 13B. The high-pressure-side pipe 13B is a pipe that connects theoil separator 15 and theadsorber 16. Additionally, an oil return port is connected to an upper end portion of theoil returning pipe 15C. Additionally, anintroduction opening 56 provided at a lower end portion of theoil returning pipe 15C opens in the vicinity of a bottom portion of theoil separator 15. - The oil return port is connected to the
oil return pipe 24. Theoil return pipe 24 has a high-pressure side connected to theoil separator 15 and a low-pressure side connected to the low-pressure side pipe 14. Additionally, afilter 43 that removes the dust included in the oil separated by theoil separator 15 and anorifice 31 that controls the return amount of oil are provided in the middle of theoil return pipe 24. - The
filter element 36A is constituted by the high-pressuregas introduction pipe 15A, afilter member 37, anupper lid body 38, alower lid body 39, and anouter punching plate 40A, theinner punching plate 41, and the like. - The
filter member 37 has, for example, the structure in which glass wool is wound around the core of theinner punching plate 41 and theouter punching plate 40A is arranged at an outermost peripheral portion of the filter member. Hence, thefilter member 37 is configured so as to be arranged between theinner punching plate 41 and theouter punching plate 40A. Theupper lid body 38 is fixed to an upper end portion of thefilter member 37 by using an adhesive (not shown), and thelower lid body 39 is fixed to a lower end portion of the filter member by using an adhesive. - As a result, the
filter member 37, theupper lid body 38, thelower lid body 39, theouter punching plate 40A, and theinner punching plate 41 have an integral configuration. Thefilter member 37 is fixed to the high-pressuregas introduction pipe 15A by welding theupper lid body 38 to the high-pressuregas introduction pipe 15A. - Both the
outer punching plate 40A arranged outside thefilter member 37 and theinner punching plate 41 arranged inside thefilter member 37 have a tubular shape. Additionally, outer through-holes 50A are formed in theouter punching plate 40A, and inner through-holes 51 are formed in theinner punching plate 41. The respective through-holes filter element 36A from the high-pressuregas introduction pipe 15A is introduced into thefilter member 37 through the inner through-holes 51 formed in theinner punching plate 41. - Then, when the supply gas advances inside the
filter member 37, the oil included in the supply gas is removed by thefilter member 37. Additionally, the supply gas the oil of which is removed by thefilter member 37 is discharged to the outside (the interior of the shell 35) of thefilter member 37 through the outer through-holes 50A of theouter punching plate 40A. - Incidentally, when the supply gas advances inside the
filter member 37 from theinner punching plate 41 toward theouter punching plate 40A, the oil included in the supply gas is removed by thefilter member 37. In this case, when the supply gas includes a large amount of oil, thefilter member 37 is not able to hold oil. As a result, a portion of oil may leak to asurface 44 of theouter punching plate 40A through the outer through-holes 50A (hereinafter, the oil leaked through the outer through-holes 50A is referred to as leak oil 60). - The
leak oil 60 is dropped on thebottom portion 35C of theshell 35 from thefilter element 36A and is reserved at a lower portion of theshell 35. Then, theleak oil 60 reserved at the lower portion of theshell 35 is returned to thecompressor body 11 via theoil returning pipe 15C, theoil return pipe 24, and the low-pressure side pipe 14. - The distribution of oil within the
filter member 37 is shown by pear skin inFIG. 3A . The oil trapped in thefilter member 37 moves downward due to gravity. For this reason, as shown inFIG. 3A , although the distribution of the oil within thefilter member 37 is little at an upper portion of the filter member, the oil increases gradually toward a lower portion of the filter member. For this reason, theleak oil 60 leaked through the outer through-holes 50A of theouter punching plate 40A also increases compared to theleak oil 60 leaked through an upper portion of theouter punching plate 40A. - When the
leak oil 60 leaked on the surface of theouter punching plate 40A through the outer through-holes 50A flows into other outer through-holes 50A, theleak oil 60 forms an oil film so as to block the outer through-holes 50A. Since refrigerant gas flows out from the inside toward the outside through the outer through-holes 50A, the oil film of theleak oil 60 will be splashed and scattered by this refrigerant gas if the oil film of theleak oil 60 is formed in the outer through-holes 50A (this phenomenon is referred to as bubbling). - When this bubbling has occurred, the
leak oil 60 may again be mixed-in to the supply gas the oil of which is removed by thefilter member 37. - Here, the
oil separator 15 related to an embodiment provides an auxiliaryflow channel plate 45A on the surface of theouter punching plate 40A. The auxiliaryflow channel plate 45A is a thin-plate-shaped member having a rectangular shape (an elongated rectangular shape in the longitudinal direction of theouter punching plate 40A). The auxiliaryflow channel plate 45A is fixed to an outer peripheral surface of theouter punching plate 40A by a well-known fixing method, such as welding. - The auxiliary
flow channel plate 45A is arranged so as to extend along the longitudinal direction (up-and-down direction inFIGS. 2 and 3A )] of theouter punching plate 40A. The auxiliaryflow channel plate 45A may be formed over the entire length of theouter punching plate 40A in the longitudinal direction. Additionally, a plurality of (twelve in the present embodiment) the auxiliaryflow channel plates 45A are also received, and the respective auxiliaryflow channel plate 45A may be arranged so as to extend radially from the surface of theouter punching plate 40A toward the outside, as shown inFIG. 3B . - Additionally, the arrangement positions of the auxiliary
flow channel plates 45A on theouter punching plate 40A do not need to exclude the arrangement positions of the outer through-holes 50A. As shown inFIG. 5 , the auxiliaryflow channel plates 45A may be arranged so as to straddle the outer through-holes 50A. In this case, the auxiliaryflow channel plates 45A may be arranged so as to straddle only one outer through-hole 50A and or may be arranged so as to straddle two or more outer through-holes 50A. - As described above, since the auxiliary
flow channel plates 45A are simple plates having a rectangular shape, the auxiliary flow channel plates can be easily manufactured. Additionally, the auxiliaryflow channel plates 45A can be fixed to theouter punching plate 40A by using a well-known technique, such as welding. Hence, the auxiliaryflow channel plates 45A can be easily arranged at theouter punching plate 40A at low costs. - Next, the behavior of the
leak oil 60 in thefilter element 36A where the auxiliaryflow channel plates 45A are arranged will be described. -
FIG. 4 is a cross-sectional enlarged view illustrating the vicinities of the positions of theouter punching plate 40A and the auxiliaryflow channel plate 45A where the outer through-holes 50A are formed. In this drawing, the left side in the drawing is the inner side of thefilter element 36A, and the right side is the outer side of thefilter element 36A. - As mentioned above, when the supply gas includes a large amount of oil, the
filter member 37 no longer holds the oil, and a portion of the oil leaks to thesurface 44 of theouter punching plate 40A through the outer through-holes 50A as theleak oil 60. - As mentioned above, if the auxiliary
flow channel plate 45A is not provided, since theleak oil 60 flows downward toward the surface of theouter punching plate 40A, the leak oil may re-flow back to the outer through-holes 50A and thus, the bubbling may occur. - However, the
oil separator 15 related to the present embodiment protrudes from the outer surface of theouter punching plate 40A, and is provided so that the auxiliaryflow channel plate 45A extends in the longitudinal direction of the auxiliaryflow channel plate 45A, that is, in the flow direction of theleak oil 60. Additionally, the auxiliaryflow channel plate 45A is provided in the vicinities of the outer through-holes 50A, and the portion of the auxiliaryflow channel plate 45A that is formed over the outer through-holes 50A is also present. - Accordingly, a flow channel, along which the
leak oil 60 that has flowed out of the outer through-holes 50A adheres to the auxiliaryflow channel plate 45A as shown inFIG. 4 and then flows downward on the surface of the auxiliaryflow channel plate 45A, is formed. That is, in the present embodiment, a flow channel, along which theleak oil 60 that has flowed out of the outer through-holes 50A is stripped from the surface of theouter punching plate 40A and flows through the auxiliaryflow channel plate 45A, is formed. For this reason, the amount of theleak oil 60 that flows on the surface of theouter punching plate 40A decreases. As a result, the leak oil can be prevented from flowing again into the outer through-holes 50A. - In this way, in the
filter element 36A related to the present embodiment, theleak oil 60 that has flowed out of the outer through-holes 50A is prevented from flowing again into the other outer through-holes 50. Therefore, the occurrence of bubbling can be suppressed, and accordingly, theleak oil 60 can be prevented from being again mixed-in to the supply gas. - Additionally, a dropping
portion 47 may be provided at a lower end portion of the auxiliaryflow channel plate 45A. In the embodiment, the droppingportion 47 is formed so as to become gradually narrow from the inner side to the outer side. The droppingportion 47 has a triangular shape when viewed from a side surface. - By providing the dropping
portion 47, theleak oil 60 that has flowed on the auxiliaryflow channel plate 45A is dropped on thebottom portion 35C of theshell 35 from a tip portion (pointed portion) of the droppingportion 47 at a position apart from the surface of the auxiliaryflow channel plate 45A. Hence, due to the droppingportion 47, theleak oil 60 on the auxiliaryflow channel plate 45A is also returned again to the surface of theouter punching plate 40A. As a result, theleak oil 60 can be prevented from being again mixed-in to the supply gas. - Next, modification examples of the
oil separator 15 related to the above-mentioned embodiment will be described.FIGS. 6 to 8 show first to the third modification examples of theoil separator 15 related to the embodiment. - In addition, since the respective modification examples have features in the filter element of the
oil separator 15, only the filter element is shown in the respective drawings and illustration of theshell 35 is omitted. Additionally, inFIGS. 6 to 8 , components corresponding to those of the first embodiment shown inFIGS. 1 to 5 will be described by the same reference numerals, and the description thereof will be omitted. -
FIG. 6 shows afilter element 36B provided at an oil separator that is a first modification example. - In the oil separator related to the present modification example, the auxiliary
flow channel plate 45B is arranged at least below a middle position of theouter punching plate 40A in the longitudinal direction. That is, if the length of the auxiliaryflow channel plate 45B in the longitudinal direction is defined as L1 and the length of theouter punching plate 40A in the longitudinal direction is defined as L2, L1<L2 is established, and the auxiliary flow channel plate is provided within a range from the lower end portion of theouter punching plate 40A to a dimension (L2/2). - As previously described using
FIG. 3A , the distribution of the oil within thefilter member 37 increases toward the lower portion of the filter member, and theleak oil 60 leaked through the outer through-holes 50A of theouter punching plate 40A becomes heavier at a lower portion of theouter punching plate 40A than at an upper portion of the outer punching plate. - For this reason, the present embodiment has a configuration in which the auxiliary
flow channel plate 45B is arranged only below the middle position, in the longitudinal direction, of theouter punching plate 40A where the amount of leak of theleak oil 60 through the outer through-holes 50A is larger. According to the configuration of the present modification example, stripping processing of theleak oil 60 from theouter punching plate 40A can be efficiently performed, and miniaturization of the auxiliaryflow channel plate 45B can be achieved. -
FIG. 7 shows afilter element 36C provided at an oil separator that is a second modification example. In the present modification example, the shape of the auxiliaryflow channel plate 45C is a triangular shape that becomes wider downward. - As mentioned above, the amount of the
leak oil 60 leaked through the outer through-holes 50A of theouter punching plate 40A is larger at the lower portion of the outer punching plate. Hence, the amount of theleak oil 60 that flows on the outer through-holes 50A increases toward the lower portion. - In contrast, in the present modification example, the area of the lower portion is made larger than that of the upper portion by forming the auxiliary
flow channel plate 45C in a triangular shape that becomes wider downward. By adopting this configuration, it is possible to make a large amount ofleak oil 60 flow at the lower portion of the auxiliaryflow channel plate 45C. Hence, at the lower portion of the auxiliaryflow channel plate 45C holding a large amount ofleak oil 60, theleak oil 60 can be prevented from returning to theouter punching plate 40A and flowing into the outer through-holes 50A. -
FIG. 8 is a cross-sectional enlarged view illustrating the vicinities of the outer through-holes 50A of a filter element provided at an oil separator that is a third modification example. In the present modification example, guidegrooves 48 are formed in the auxiliaryflow channel plate 45C. - As shown in
FIG. 8 , theguide grooves 48 are formed so as to extend obliquely downward from positions near the outer through-holes 50A formed in theouter punching plate 40A. By providing theguide grooves 48 in the auxiliaryflow channel plate 45D, theleak oil 60 that has flowed out of the outer through-holes 50A and adheres to the auxiliaryflow channel plate 45D flows into theguide grooves 48. - The
leak oil 60 that has flowed into theguide grooves 48 flows along the shape of theguide grooves 48. Hence, theleak oil 60 is guided by theguide grooves 48 and flows in a direction away out from the surface of theouter punching plate 40A. As a result, even in the present modification example, theleak oil 60 that has flowed out of the outer through-holes 50A can be prevented from flowing again into theouter punching plate 40A and the outer through-holes 50A. Hence, theleak oil 60 can be prevented from being again mixed-in to the supply gas the oil of which is removed by thefilter member 37. - In addition, in the present modification example, the extending direction of the
guide grooves 48 is set so as to become about 45° downward with respect to the horizontal direction, but this angle can be appropriately changed. That is, as the angle of theguide grooves 48 with respect to the horizontal direction becomes larger, the speed at which theleak oil 60 flows through theguide grooves 48 becomes faster. - Additionally, although the shape of the
guide grooves 48 is a long elliptical shape in the present modification example, the shape of theguide grooves 48 is not limited to this. For example, the shape of the guide grooves may be a nonlinear shape, such as an L-shape, and the width, length, and depth of the guide grooves can also be appropriately changed. It is possible to appropriately control the flow speed (the amount of flows) and flowing position of theleak oil 60 on the auxiliaryflow channel plate 45D depending on the angle with respect to the horizontal direction, width, length, depth, shape, and the like. This can also prevent theleak oil 60 that has flowed out of the outer through-holes 50A from flowing again into theouter punching plate 40A and the outer through-holes 50A. - Next, an oil separator that is a still another embodiment of the invention will be described.
FIGS. 9 and 10 are views for describing the oil separator that is the still another embodiment. - In addition, since this embodiment also has a feature in a
filter element 36D of the oil separator, only thefilter element 36D is shown in the respective drawings, and the illustration of theshell 35 is omitted. Additionally, even inFIGS. 9 and 10 , components corresponding to those of the first embodiment shown inFIGS. 1 to 5 will be described by the same reference numerals, and the description thereof will be omitted. - The oil separator related to this embodiment is characterized by providing the
filter element 36D with acollar portion 49. A plurality of (six in the present embodiment) thecollar portions 49 are provided on the surface of theouter punching plate 40A. Additionally, therespective collar portions 49 are provided in parallel. - Each
collar portion 49 is formed so as to surround the surface of theouter punching plate 40A, and the shape of the collar portion in a cross-section extends further downward than the horizontal shape (see a cross-sectional portion on the left of the centerline ofFIG. 9 ). Accordingly, it can be said that thecollar portions 49 have an umbrella shape. - Additionally, each
collar portion 49 is formed so as to cover at least one outer through-hole 50A.FIG. 10 shows an enlarged portion illustrated using arrow B ofFIG. 9 . As shown in this drawing, in the present embodiment, thecollar portion 49 is configured to cover one outer through-hole 50A. - In the oil separator related to the present embodiment, the
leak oil 60 that has flowed out of the outer through-holes 50A, as shown inFIG. 10 , flows along upper surfaces of thecollar portions 49 that extend obliquely downward, and is dropped at thebottom portion 35C of theshell 35 from lower end portions of thecollar portions 49. - Hence, even in the present embodiment, the
leak oil 60, that has flowed out of the outer through-holes 50A, flows on thecollar portions 49, is stripped from the surface of theouter punching plate 40A, and separates from the surface of theouter punching plate 40A, as it flows on thecollar portions 49. Accordingly, even in the present embodiment, theleak oil 60 that has flowed out of the outer through-holes 50A can be prevented from flowing again into theouter punching plate 40A and the outer through-holes 50A. Hence, theleak oil 60 can be prevented from being again mixed-in to the supply gas the oil of which is removed by thefilter member 37. - In addition, the angle (shown by arrow θ in
FIG. 10 ) of thecollar portions 49 with respect to the surface of theouter punching plate 40A can be set to a range of 0°≦θ≦90°. Although the flow speed of theleak oil 60 on thecollar portions 49 becomes slow by making this inclination angle θ small, theleak oil 60 can be separated from the surface of theouter punching plate 40A by a short length. Additionally, when the inclination angle θ is made small, the flow speed of theleak oil 60 on thecollar portions 49 becomes fast. However, it is necessary to make thecollar portions 49 extend long in order to separate theleak oil 60 from the surface of theouter punching plate 40A. - Additionally, in the embodiment shown in
FIGS. 9 and 10 , theouter punching plate 40A is provided with the plurality ofcollar portions 49. However, it is also possible to adopt a configuration in which a collar portion is formed in a spiral shape and theleak oil 60 that flows out of the outer through-holes 50A is stripped from the surface of theouter punching plate 40A by one collar portion as the result of the configuration. - Next, an oil separator that is a still another embodiment of the invention will be described.
FIGS. 11 and 12 are views for describing an oil separator that is a third embodiment. Additionally,FIG. 12A shows the enlarged surface of theouter punching plate 40B of a region illustrated using arrow UP ofFIG. 11 , andFIG. 12B shows the enlarged surface of theouter punching plate 40B of a region illustrated using arrow LO ofFIG. 11 . - In addition, since this embodiment also has a feature in a
filter element 36E of the oil separator, only thefilter element 36E is shown in the respective drawings, and the illustration of theshell 35 is omitted. Additionally, even inFIGS. 11 and 12 , components corresponding to those of the first embodiment shown inFIGS. 1 to 5 will be described by the same reference numerals, and the description thereof will be omitted. - In the oil separator related to the present embodiment, the open area ratio (the ratio of the total hole area of the outer through-holes to the total surface area of the
outer punching plate 40B) of the outer through-holes outer punching plate 40B of thefilter element 36E is changed at the upper portion and lower portion of theouter punching plate 40B. Specifically, in the oil separator related to the present embodiment, the open area ratio of the outer through-holes 50C arranged below (the region shown by arrow LO inFIG. 11 ) a middle position in the longitudinal direction of theouter punching plate 40A is set to be smaller than the open area ratio of the outer through-holes 50B arranged above (the region shown by arrow UP inFIG. 11 ) the middle position. - In the present embodiment, the individual outer through-
holes 50B and the individual outer through-holes 50C have the same diameter (the same area). Accordingly, the number of the formed outer through-holes 50C arranged in the region LO (shown inFIG. 12B ) below the middle position is smaller than the number of the formed outer through-holes 50B arranged in the region UP (shown inFIG. 12A ) above the middle position. - Accordingly, when a flow channel along which the
leak oil 60 in the surface of theouter punching plate 40B flows is taken into consideration, the flow channel area becomes narrow in the region UP above the middle position shown inFIG. 12A . On the other hand, the flow channel area becomes wide in the region LO below the middle position shown inFIG. 12B . - As mentioned above, the amount of oil included in the
filter member 37 is not uniform at upper and lower positions, is smaller in the region UP above the middle position, and is larger in the region UP below the middle position. For this reason, in the region UP above the middle position of theouter punching plate 40B, the outflow amount of the supply gas is large but the outflow amount of theleak oil 60 is small. On the contrary, in the region LO below the middle position of theouter punching plate 40B, the outflow amount of theleak oil 60 is large but the outflow amount of the supply gas is small. - Hence, the supply gas the oil of which is removed by the
filter member 37 efficiently flows out of theouter punching plate 40B into theshell 35 through the multiple outer through-holes 50B formed in the region UP above the middle position. - On the other hand, as mentioned above, since the oil removed by the
filter member 37 flows downward through thefilter member 37, theleak oil 60 that flows out of the outer through-holes 50C in the lower region LO increases. However, as shown inFIG. 12B , in the lower region LO, the distance between adjacent outer through-holes 50C is long and the flow channel of theleak oil 60 is ensured. For this reason, theleak oil 60 that has flowed out of the outer through-holes 50C flows out downward without flowing again into the other outer through-holes 50C (the flow of theleak oil 60 is shown by arrow inFIG. 12B ). - Hence, the
leak oil 60 that has flowed out of the outer through-holes 50C can be prevented from flowing again into the other outer through-holes 50C. Therefore, theleak oil 60 can be prevented from being again mixed-in to the supply gas the oil of which is removed by thefilter member 37. Additionally, since the supply gas flows outside thefilter element 36E in the upper region UP with a large open area ratio, the outflow resistance of supply gas can be made small, and efficient gas-liquid separation can be performed. - In addition, the above-described embodiment has a configuration in which the open area ratio of the lower region LO with respect to the upper region UP is increased by making the diameters of the respective outer through-
holes holes 50B in the upper region UP and the number of arranged outer through-holes 50C in the lower region LO. - However, the open area ratio of lower region LO with respect to the upper region UP can also be increased by setting the numbers of formed through-holes in the upper region UP and the lower region LO equal to each other and changing the diameters of the outer through-
holes 50B and the outer through-holes 50C different from each other. - That is, the open area ratio of the lower region LO with respect to the upper region UP can be increased evenly by making the diameter of the outer through-
holes 50C arranged in the lower region LO smaller than the diameter of the outer through-holes 50B arranged in the upper region UP. - Additionally, the above-described embodiment has a configuration in which the
outer punching plate 40B are divided into the upper region UP and the lower region LO at the middle position, and the open area ratio is changed in the upper region UP and the lower region LO. However, a configuration may be adopted in which the number and the diameter of the outer through-holes are changed so that the open area ratio of the outer through-holes increase gradually from the upper end portion of theouter punching plate 40B toward the lower end portion thereof. - Although the preferable embodiment of the invention has been described above in detail, the invention is not limited to the above-described specific embodiment, and various alterations and changes can be made within the scope of the invention described in the claims.
Claims (10)
1. A cryogenic refrigerator system comprising:
a compressor that boosts a refrigerant gas;
an oil separator that separates oil from the boosted refrigerant gas; and
a cryogenic refrigerator that expands the refrigerant gas discharged from the oil separator,
wherein the oil separator includes:
a container;
an inlet pipe that is arranged at an upper portion of the container and introduces the refrigerant gas;
a filter member that is arranged between an inner punching plate having inner through-holes and an outer punching plate having outer through-holes;
an outlet pipe that is arranged at the upper portion of the container outside the filter member and allows the refrigerant gas passed through the filter member to be discharged therethrough;
a discharge port that is arranged at a lower portion of the container and allows oil separated by the filter member to be discharged therethrough; and
an auxiliary flow channel that is provided outside the outer punching plate and guides the separated oil to the discharge port.
2. The cryogenic refrigerator system according to claim 1 ,
wherein the auxiliary flow channel is arranged at least below a middle position of the outer punching plate in an up-and-down direction.
3. The cryogenic refrigerator system according to claim 1 ,
wherein the auxiliary flow channel has a length such that the channel straddles at least two or more outer through-holes in the up-and-down direction.
4. The cryogenic refrigerator system according to claim 1 ,
wherein the auxiliary flow channel has a groove portion that guides the separated oil to a bottom portion in a surface thereof.
5. The cryogenic refrigerator according to claim 1 ,
wherein the auxiliary flow channel is a plate-shaped member that extends in an up-and-down direction.
6. The cryogenic refrigerator system according to claim 1 ,
wherein the auxiliary flow channel includes a collar portion that extends vertically and downwardly with respect to the surface of the outer punching plate, and the separated oil is dropped to the discharge port from a position apart from the surface of the outer punching plate.
7. The cryogenic refrigerator system according to claim 1 ,
wherein the open area ratio of the outer through-holes arranged below a middle position of the outer punching plate in an up-and-down direction is smaller than the open area ratio of the outer through-holes arranged above the middle position.
8. The cryogenic refrigerator system according to claim 1 ,
wherein the number of the formed outer through-holes arranged below a middle position of the outer punching plate in a longitudinal direction is smaller than the number of the formed outer through-holes arranged above the middle position.
9. The cryogenic refrigerator system according to claim 1 ,
wherein the diameter of the outer through-holes arranged below a middle position of the outer punching plate in a longitudinal direction is smaller than the diameter of the outer through-holes arranged above the middle position.
10. An oil separator used for a cryogenic refrigerator system, the oil separator comprising:
a container;
an inlet pipe that is arranged at an upper portion of the container and introduces a refrigerant gas;
a filter member that is arranged between an inner punching plate and an outer punching plate;
an outlet pipe that is arranged at the upper portion of the container outside the filter member and allows the refrigerant gas passed through the filter member to be discharged therethrough;
a discharge port that is arranged at a lower portion of the container and allows oil separated by the filter member to be discharged therethrough; and
an auxiliary flow channel that is provided outside the outer punching plate and guides the separated oil to the discharge port.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013026038A JP6144064B2 (en) | 2013-02-13 | 2013-02-13 | Cryogenic refrigerator system and oil separator |
JP2013-026038 | 2013-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140223954A1 true US20140223954A1 (en) | 2014-08-14 |
Family
ID=51275124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/169,468 Abandoned US20140223954A1 (en) | 2013-02-13 | 2014-01-31 | Cryogenic refrigerator system and oil separator |
Country Status (3)
Country | Link |
---|---|
US (1) | US20140223954A1 (en) |
JP (1) | JP6144064B2 (en) |
CN (1) | CN103983056B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200340517A1 (en) * | 2017-11-16 | 2020-10-29 | Physik Instrumente (Pi) Gmbh & Co. Kg | Spindle nut |
EP4357696A1 (en) * | 2022-10-18 | 2024-04-24 | Sumitomo Heavy Industries, LTD. | Oil-lubricated cryocooler compressor and operation method thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7292904B2 (en) * | 2019-03-06 | 2023-06-19 | 住友重機械工業株式会社 | Oil separators, filter elements, and compressors for cryogenic refrigerators |
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US1871546A (en) * | 1931-10-13 | 1932-08-16 | Edward R Mcclafferty | Automatic oil separator |
US3802160A (en) * | 1972-05-17 | 1974-04-09 | Hankison Corp | Aerosol coalescing filter and the like |
US4755114A (en) * | 1986-03-03 | 1988-07-05 | Hitachi, Ltd. | Sealed type scroll compressor with wire mesh oil separating member |
US4806241A (en) * | 1987-05-18 | 1989-02-21 | Holien Dwight H | Overflow lint strainer |
US6468333B2 (en) * | 2001-01-22 | 2002-10-22 | Aeronex, Inc. | Gas purifier apparatus |
US20100269538A1 (en) * | 2009-04-23 | 2010-10-28 | Sumitomo Heavy Industries, Ltd | Oil separator and compressor for regenerative refrigerator |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CH185502A (en) * | 1935-06-13 | 1936-07-31 | Rudolf Dr Bloch | Cooker absorber for periodic dry absorption refrigeration machines. |
SU1139941A1 (en) * | 1983-01-10 | 1985-02-15 | Предприятие П/Я А-3857 | Oil separator |
JPS6332619U (en) * | 1986-08-18 | 1988-03-02 | ||
JPH1114113A (en) * | 1997-06-18 | 1999-01-22 | Matsushita Seiko Co Ltd | Filter of range hood |
JP4398959B2 (en) * | 2006-08-02 | 2010-01-13 | 住友重機械工業株式会社 | Compressor for oil separator and regenerator type refrigerator |
-
2013
- 2013-02-13 JP JP2013026038A patent/JP6144064B2/en not_active Expired - Fee Related
-
2014
- 2014-01-31 US US14/169,468 patent/US20140223954A1/en not_active Abandoned
- 2014-02-07 CN CN201410045312.4A patent/CN103983056B/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1871546A (en) * | 1931-10-13 | 1932-08-16 | Edward R Mcclafferty | Automatic oil separator |
US3802160A (en) * | 1972-05-17 | 1974-04-09 | Hankison Corp | Aerosol coalescing filter and the like |
US4755114A (en) * | 1986-03-03 | 1988-07-05 | Hitachi, Ltd. | Sealed type scroll compressor with wire mesh oil separating member |
US4806241A (en) * | 1987-05-18 | 1989-02-21 | Holien Dwight H | Overflow lint strainer |
US6468333B2 (en) * | 2001-01-22 | 2002-10-22 | Aeronex, Inc. | Gas purifier apparatus |
US20100269538A1 (en) * | 2009-04-23 | 2010-10-28 | Sumitomo Heavy Industries, Ltd | Oil separator and compressor for regenerative refrigerator |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200340517A1 (en) * | 2017-11-16 | 2020-10-29 | Physik Instrumente (Pi) Gmbh & Co. Kg | Spindle nut |
US11885367B2 (en) * | 2017-11-16 | 2024-01-30 | Physik Instrumente (Pi) Gmbh & Co. Kg | Spindle nut |
EP4357696A1 (en) * | 2022-10-18 | 2024-04-24 | Sumitomo Heavy Industries, LTD. | Oil-lubricated cryocooler compressor and operation method thereof |
Also Published As
Publication number | Publication date |
---|---|
JP6144064B2 (en) | 2017-06-07 |
CN103983056B (en) | 2017-04-12 |
CN103983056A (en) | 2014-08-13 |
JP2014153038A (en) | 2014-08-25 |
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AS | Assignment |
Owner name: SUMITOMO HEAVY INDUSTRIES, LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHIMADA, TAKUYA;REEL/FRAME:032105/0498 Effective date: 20140117 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |