EP2741029A2 - Séparateur d'huile - Google Patents

Séparateur d'huile Download PDF

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Publication number
EP2741029A2
EP2741029A2 EP13196122.9A EP13196122A EP2741029A2 EP 2741029 A2 EP2741029 A2 EP 2741029A2 EP 13196122 A EP13196122 A EP 13196122A EP 2741029 A2 EP2741029 A2 EP 2741029A2
Authority
EP
European Patent Office
Prior art keywords
pipe
internal space
gas
shell
cylindrical internal
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.)
Granted
Application number
EP13196122.9A
Other languages
German (de)
English (en)
Other versions
EP2741029B1 (fr
EP2741029A3 (fr
Inventor
Ken Watanabe
Takayuki Hattori
Takayuki Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP2741029A2 publication Critical patent/EP2741029A2/fr
Publication of EP2741029A3 publication Critical patent/EP2741029A3/fr
Application granted granted Critical
Publication of EP2741029B1 publication Critical patent/EP2741029B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/02—Centrifugal separation of gas, liquid or oil

Definitions

  • the present invention relates to an oil separator that is suitable for use in a refrigerator or an air conditioner.
  • centrifugal oil separator in which refrigerant oil contained in refrigerant discharged from a compressor is separated by centrifugation, thus separating gas-phase refrigerant and refrigerant oil.
  • PTL 1 discloses a countermeasure for this.
  • PTL 1 discloses an oil separator including the following: a shell having a cylindrical part and a tapered part that is integrally formed at a lower portion of the cylindrical part and that is tapered downward; an outlet pipe that is inserted into the shell from an upper portion of the shell so as to be coaxial with the shell; a discharge pipe that is connected to an opening provided at a lower portion of the tapered part; and an inlet pipe that is connected along the tangential direction of an inner wall surface of the cylindrical part and through which a gas-liquid two-phase fluid flows into the shell, in which the distance between the opening and a shell side end portion of the outlet pipe is equal to or more than five times the inner diameter of the inlet pipe.
  • the inlet pipe has a straight pipe portion connected to the cylindrical part of the shell, and the length of the straight pipe portion is equal to or more than eight times the inner diameter of the inlet pipe; as a result, when the gas flow rate is small, the efficiency of oil separation can be improved at a low cost.
  • PTL 1 discloses the outlet pipe, which is inserted into the shell from the upper portion of the shell so as to be coaxial with the shell, and the discharge pipe, which is opposed to the outlet pipe.
  • a mixture fluid of refrigerant gas and oil is supplied from a gas inlet pipe 5 and is separated into gas and oil in the shell pipe 2.
  • a pressure field 6 tends to be formed in the refrigerant flow flowing in and around a center portion of the shell pipe 2. Because the pressure field 6 is formed into a ring shape (point symmetry) as viewed in a transverse section of the shell pipe 2, a specific vibration mode tends to be excited.
  • pressure fluctuation tends to occur between an inner circumferential side and an outer circumferential side of the pressure field 6.
  • the specific vibration generated by the pressure fluctuation is transferred to the pipes, thus causing resonance and noise.
  • the present invention has been made in view of such circumstances, and an object thereof is to provide an oil separator that prevents the occurrence of resonance by preventing a specific vibration in the shell pipe.
  • the oil separator of the present invention employs the following solutions.
  • a first aspect of the present invention provides an oil separator comprising the following elements: a housing (shell pipe) that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and an approximately-linearly-formed gas outlet pipe that is located oppositely to the oil return pipe and that guides gas separated in the cylindrical internal space to the outside, wherein a central axis line of the gas outlet pipe is provided eccentrically with respect to a central axis line of the shell pipe.
  • the gas outlet pipe is provided eccentrically with respect to the central axis line of the shell pipe.
  • the flow and the pressure field in the shell pipe can be prevented from being point symmetrical.
  • excitation of a specific vibration mode can be prevented.
  • vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. Therefore, noise can be prevented from occurring.
  • a second aspect of the present invention provides an oil separator comprising the following elements: a shell pipe that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and an approximately-linearly-formed gas outlet pipe that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside, wherein an open end surface of a tip portion of the gas outlet pipe that is located inside the shell pipe is configured so as to form an angle with respect to a plane perpendicular to a central axis line of the shell pipe.
  • the open end surface of the tip portion of the gas outlet pipe which is located inside the shell pipe, is configured so as to form an angle with respect to a plane perpendicular to the central axis line of the shell pipe.
  • a third aspect of the present invention provides an oil separator comprising the following elements: a shell pipe that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and an approximately-linearly-formed gas outlet pipe that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside, wherein the gas outlet pipe is provided such that a central axis line of the gas outlet pipe is inclined with respect to a central axis line of the shell pipe.
  • the gas outlet pipe is provided so as to be inclined with respect to the central axis line of the shell pipe.
  • a fourth aspect of the present invention provides an oil separator comprising the following elements: a shell pipe that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and a gas outlet pipe that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside, wherein a tip portion of the gas outlet pipe is curved so that the tip portion of the gas outlet pipe has a predetermined angle with respect to a central axis line of the shell pipe.
  • the tip portion of the gas outlet pipe is curved with respect to the central axis line of the shell pipe.
  • the position and the shape of the gas outlet pipe are not aligned with the central axis line of the shell pipe.
  • the flow and the pressure field in the shell pipe can be prevented from being point symmetrical.
  • excitation of a specific vibration mode can be prevented.
  • vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. Therefore, noise can be prevented from occurring.
  • Fig. 1 is a perspective view showing, in outline, a configuration of an oil separator 1 of this embodiment.
  • the oil separator 1 is used in a refrigerator or an air conditioner.
  • the oil separator 1 is provided with a shell pipe 2, an oil return pipe 3, a gas outlet pipe 4, and a gas inlet pipe 5.
  • the shell pipe 2 of the oil separator 1 is formed in a cylindrical shape. Furthermore, a cylindrically-formed internal space is provided inside the shell pipe 2.
  • the gas inlet pipe 5 that introduces gas is inserted into the shell pipe 2 along the tangential direction of the cylindrical internal space.
  • the gas inlet pipe 5 is provided on a side portion of the shell pipe 2 when viewed in the axial direction of the shell pipe 2.
  • the approximately-linearly-formed oil return pipe 3 that guides oil separated in the internal space of the shell pipe 2 to the outside is connected to a lower surface of the shell pipe 2.
  • the approximately-linearly-formed gas outlet pipe 4 that is disposed so as to be opposed to the oil return pipe 3 and that guides gas separated in the internal space of the shell pipe 2 to the outside is provided through an upper surface of the shell pipe 2.
  • the centrifugal oil separator 1 is provided with the gas inlet pipe 5, through which a mixture fluid of refrigerant gas and oil is supplied from a compressor (not shown) located near the shell pipe 2, and the gas outlet pipe 4, through which only the separated gas flows out. Furthermore, the oil return pipe 3, through which oil separated from the gas flows out, is connected to a bottom portion of the shell pipe 2.
  • the central axis line L2 of the gas outlet pipe 4 provided in the shell pipe 2 is provided so as to be eccentric with respect to the central axis line L1 of the shell pipe 2.
  • the eccentric distance between the central axis line L1 and the central axis line L2 when the diameter of the shell pipe 2 is 50 mm, and the diameter of the gas outlet pipe 4 is 15 mm, for example, the central axis line L2 of the gas outlet pipe 4 is provided 2 mm to 3 mm eccentrically with respect to the central axis line L1 of the shell pipe 2.
  • the oil drips down along the inner wall surface of the shell pipe 2, the dripped oil flows into the oil return pipe 3 from a junction point of the oil return pipe 3 and the shell pipe 2, and the oil returns to a suction pipe of the compressor (not shown).
  • the central axis line L2 of the gas outlet pipe 4 is provided eccentrically with respect to the central axis line L1 of the shell pipe 2.
  • a pressure field 6 (see Fig. 6 ) produced by the flow in the shell pipe 2 is prevented from being point symmetrical.
  • the pressure field 6 can be prevented from being produced.
  • vibrations in the shell pipe 2 can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. Therefore, noise can be prevented from occurring.
  • the central axis line L2 of the gas outlet pipe 4, which is inserted into the shell pipe 2 shown in the first embodiment, and the central axis line L1 of the shell pipe 2 are concentrically provided. Identical symbols are assigned to the corresponding structures of the first embodiment, and a description thereof will be omitted.
  • the central axis line L1 of the shell pipe 2 and the central axis line L2 of the gas outlet pipe 4 are concentric.
  • An open end surface of a tip portion 4a of the gas outlet pipe 4 that is located inside the shell pipe 2 is formed so as to form an angle with respect to a plane perpendicular to the central axis line L1 of the shell pipe 2.
  • the angle of inclination of the tip portion 4a is set to 45 degrees, for example, or may be set larger or smaller than 45 degrees.
  • the flow of suctioned gas from the open end surface of the tip portion 4a of the gas outlet pipe 4 can be made uneven. Therefore, even though the central axis line L2 of the gas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of the shell pipe 2, it is possible to prevent the pressure field 6 (see Fig. 6 ), which can be produced by the flow in the shell pipe 2, from being point symmetrical. Thus, vibrations in the shell pipe 2 can be prevented, and then the occurrence of resonance in the shell pipe can be prevented.
  • central axis line L2 of the gas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of the shell pipe 2, manufacturing process can be reduced compared with a case in which they are eccentrically provided.
  • Fig. 4 is a sectional side view showing a modification of the oil separator 1 of the second embodiment of the present invention.
  • the gas outlet pipe 4 is provided in the shell pipe 2 so as to extend across the central axis line L1 of the shell pipe 2 and so as to be inclined with respect to the central axis line L1.
  • the gas outlet pipe 4 is inclined with respect to the central axis line L1 of the shell pipe 2, even though the gas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of the shell pipe 2, it is possible to prevent the flow in the shell pipe and the pressure field from being point symmetrical. Thus, vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented.
  • Fig. 5 is a sectional side view showing a modification of the oil separator 1 of the second embodiment of the present invention.
  • a tip portion 4b of the gas outlet pipe 4 in the shell pipe 2 is curved so as to have a predetermined angle with respect to the central axis line L1 of the shell pipe 2.
  • the predetermined angle is set to an angle at which the central axis line L1 of the shell pipe 2 is located outside an opening of the tip portion 4b, for example.
  • the tip portion 4b of the gas outlet pipe 4 is curved with respect to the central axis line L1 of the shell pipe 2. Furthermore, the gas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of the shell pipe 2.
  • the flow in the shell pipe 2 and the pressure field can be prevented from being point symmetrical. Specifically, because vibrations in the shell pipe 2 can be prevented, the occurrence of resonance in the shell pipe can be prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cyclones (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Separating Particles In Gases By Inertia (AREA)
EP13196122.9A 2012-12-10 2013-12-06 Séparateur d'huile Active EP2741029B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012269520A JP6219032B2 (ja) 2012-12-10 2012-12-10 オイルセパレータ

Publications (3)

Publication Number Publication Date
EP2741029A2 true EP2741029A2 (fr) 2014-06-11
EP2741029A3 EP2741029A3 (fr) 2016-06-22
EP2741029B1 EP2741029B1 (fr) 2018-10-24

Family

ID=49841489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13196122.9A Active EP2741029B1 (fr) 2012-12-10 2013-12-06 Séparateur d'huile

Country Status (3)

Country Link
EP (1) EP2741029B1 (fr)
JP (1) JP6219032B2 (fr)
TR (1) TR201900560T4 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6788073B2 (ja) * 2019-06-05 2020-11-18 三菱重工サーマルシステムズ株式会社 サイクロン式油分離器および冷凍システム
CN217383382U (zh) * 2021-12-16 2022-09-06 南昌中昊机械有限公司 一种储液器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4356214B2 (ja) 2000-08-21 2009-11-04 三菱電機株式会社 油分離器および室外機

Family Cites Families (21)

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Publication number Priority date Publication date Assignee Title
JPS5722610U (fr) * 1980-07-15 1982-02-05
JPS57117360A (en) * 1981-01-12 1982-07-21 Mitsubishi Mining & Cement Co Ltd Cyclone
JPS5962358A (ja) * 1982-09-30 1984-04-09 Nippon Cement Co Ltd サイクロン
JPS5997720U (ja) * 1982-12-22 1984-07-02 株式会社日立製作所 油分離装置
JPS6377643U (fr) * 1986-11-10 1988-05-23
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US5502984A (en) * 1993-11-17 1996-04-02 American Standard Inc. Non-concentric oil separator
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KR20070106875A (ko) * 2006-05-01 2007-11-06 삼성전자주식회사 내부진입형 배출관을 갖춘 밀폐용기 및 이를 이용한오일분리기, 기액분리기, 공조장치
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CN202177269U (zh) * 2011-06-30 2012-03-28 东莞市新时代新能源科技有限公司 一种空气源热泵油气分离回收器

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JP4356214B2 (ja) 2000-08-21 2009-11-04 三菱電機株式会社 油分離器および室外機

Also Published As

Publication number Publication date
JP2014115018A (ja) 2014-06-26
TR201900560T4 (tr) 2019-02-21
EP2741029B1 (fr) 2018-10-24
EP2741029A3 (fr) 2016-06-22
JP6219032B2 (ja) 2017-10-25

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