US20130287618A1 - Refrigerant Compressor - Google Patents

Refrigerant Compressor Download PDF

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Publication number
US20130287618A1
US20130287618A1 US13/997,552 US201113997552A US2013287618A1 US 20130287618 A1 US20130287618 A1 US 20130287618A1 US 201113997552 A US201113997552 A US 201113997552A US 2013287618 A1 US2013287618 A1 US 2013287618A1
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United States
Prior art keywords
oil
storage chamber
oil storage
open end
refrigerant
Prior art date
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Abandoned
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US13/997,552
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English (en)
Inventor
Tsutomu Ishikawa
Yujiro Morita
Yukihiko Taguchi
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.)
Sanden Corp
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Individual
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
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Assigned to SANDEN CORPORATION reassignment SANDEN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MORITA, YUJIRO, ISHIKAWA, TSUTOMU, TAGUCHI, YUKIHIKO
Publication of US20130287618A1 publication Critical patent/US20130287618A1/en
Assigned to SANDEN HOLDINGS CORPORATION reassignment SANDEN HOLDINGS CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SANDEN CORPORATION
Assigned to SANDEN HOLDINGS CORPORATION reassignment SANDEN HOLDINGS CORPORATION CORRECTIVE ASSIGNMENT TO CORRECT THE PROPERTY NUMBERS PREVIOUSLY RECORDED AT REEL: 038489 FRAME: 0677. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: SANDEN CORPORATION
Assigned to SANDEN HOLDINGS CORPORATION reassignment SANDEN HOLDINGS CORPORATION CORRECTIVE ASSIGNMENT TO CORRECT THE TYPOGRAPHICAL ERRORS IN PATENT NOS. 6129293, 7574813, 8238525, 8083454, D545888, D467946, D573242, D487173, AND REMOVE 8750534 PREVIOUSLY RECORDED ON REEL 047208 FRAME 0635. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF NAME. Assignors: SANDEN CORPORATION
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/026—Lubricant separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/16—Filtration; Moisture separation

Definitions

  • the present invention relates to a refrigerant compressor to be used for a vehicle air-conditioning systems, and the like, and more specifically, relates to a recirculation structure for lubrication oils.
  • a lubrication oil is mixed in a refrigerant drawn into and discharged from the refrigerant compressor, but when an oil circulation rate (OCR) to an aft-conditioning system becomes high, heat exchange is prevented and the cooling performance drops. Accordingly, it is required to lower the oil circulation rate.
  • OCR oil circulation rate
  • an oil recirculation mechanism which separates an oil from a refrigerant discharged from a compressing mechanism and returns the oil to a suction pressure region of the compressing mechanism.
  • the oil recirculation mechanism includes an oil-separation portion (separation chamber 41 and separation tube 43 ) for separating an oil from the refrigerant, an oil storage chamber (oil retaining chamber 44 ) for storing the separated oil, an oil return passage (oil supply passage 61 a , 61 b ) through which the oil storage chamber communicates with a suction pressure region, and an orifice (fluid restrictor 62 ) that is a depressurizing device provided in the oil return passage.
  • a refrigerant compressor premises a construction including a compressing mechanism that compresses a refrigerant gas drawn from an external refrigerant circuit and discharges the compressed refrigerant, and an oil recirculation mechanism that separates a lubrication oil from the refrigerant discharged from the compressing mechanism and returns the lubrication oil to a suction pressure region of the compressing mechanism.
  • the oil recirculation mechanism includes: an oil separation portion for separating an oil from the discharged refrigerant; an oil storage chamber for storing the oil separated by the oil separation portion; an oil return passage through which the oil storage chamber communicates with the suction pressure region; and a depressurizing device provided in the oil return passage.
  • the oil storage chamber extends in a diametric direction of a compressor housing and has an open end at an outer face of the housing, the open end is occluded by an occluding member; a partition wall, that separates the oil storage chamber from the suction pressure region, is present in a region more inside than the opening of the open end; a through-hole, that is the oil return passage and that penetrates through the partition wall and has one end which opens to the oil storage chamber and the other end which opens to the suction pressure region, is linearly formed so that the through-hole can be observed from the opening of the open end; and the depressurizing device is accommodated and positioned in the through-hole.
  • the oil return passage and the depressurizing device are disposed in a region of the oil storage chamber more inside than the opening of the open end, it is possible to accommodate the oil recirculation mechanism compactly. Further, it is possible to easily form the oil return passage (through-hole) from the open end side of the oil storage chamber, and it is possible to easily attach the depressurizing device. Furthermore, since the attachment of the depressurizing device is easy, attachment of a depressurizing device with a filter also becomes easy.
  • FIG. 1 is a cross-sectional view of a refrigerant compressor (in particular, a variable displacement compressor) illustrating an embodiment of the present invention.
  • FIG. 2 is an A-A cross-sectional view of FIG. 1
  • FIG. 3 is a view observed from an arrow B of FIG. 2 (a view of an oil storage chamber observed from its open end side).
  • FIG. 4 is a C-C cross-sectional view of FIG. 2 .
  • FIG. 5 is an enlarged view of an orifice with a filter.
  • FIG. 6 is a view of an oil storage chamber illustrating another embodiment of the present invention observed from its open end side.
  • FIG. 1 is a cross-sectional view of a refrigerant compressor (in particular, a variable displacement compressor) illustrating an embodiment of the present invention.
  • FIG. 2 is an A-A cross-sectional view of FIG. 1
  • FIG. 3 is a view observed from an arrow B of FIG. 2
  • FIG. 4 is a C-C cross-sectional view of FIG. 2 .
  • FIG. 3 is a view of an oil storage chamber 132 observed from its open end side, wherein an occluding member 134 and an orifice 136 are not illustrated.
  • FIG. 5 is an enlarged view of an orifice with a filter.
  • variable displacement compressor First, the basic construction of a variable displacement compressor will be described.
  • a variable displacement compressor 100 includes a cylinder block 101 that has a plurality of cylinder bores 101 a disposed in parallel to and around the axis of the cylinder block 101 ; a front housing 102 that is provided on one end of the cylinder block 101 ; and a cylinder head (rear housing) 104 that is provided on the other end of the cylinder block 101 with a valve plate (valve-port-formed member) 103 interposed therebetween.
  • These components as well as interposed gaskets, which are not illustrated, are fastened together by bolts 140 to constitute a compressor housing.
  • a drive shaft 106 is provided so as to extend laterally across a crank chamber 105 formed between the cylinder block 101 and the front housing 102 , and a swash plate 107 is disposed around the drive shaft 106 .
  • the swash plate 107 is coupled via a connecting unit 109 with a rotor 108 fixed to the drive shaft 106 , so that the inclination angle of the swash plate 107 along the drive shaft 106 is variable.
  • a coil spring 110 for urging a force to the swash plate 107 toward the minimum inclination angle is attached, and further, on the other side across the swash plate 107 , a coil spring 111 for urging a force to the swash plate 107 toward a direction of increasing the inclination angle is attached.
  • One end of the drive shaft 106 extends through a boss portion 102 a protruding outwardly from the front housing 102 , to the outside and is connected to an electromagnetic clutch, which is not illustrated.
  • an electromagnetic clutch which is not illustrated.
  • a shaft seal device 112 is inserted so as to form a sealing between the inside and the outside of the front housing 102 .
  • the drive shaft 106 is supported by bearings 113 , 114 , 115 and 116 in radial and thrust directions, so that a drive force from an external drive source is propagated via the electromagnetic clutch to rotate the shaft 106 .
  • each piston 117 is inserted and disposed so that its head is on the cylinder head 104 side and that the piston 117 is reciprocatable.
  • a rectangular recess 117 a is formed, and the outer peripheral portion of the swash plate 107 is accommodated in the recess 117 a so that the piston 117 and the swash plate 107 are configured to interlock with each other via a pair of front and rear shoes 118 . Accordingly, by rotation of the drive shaft 106 , each piston 117 can be reciprocated in each cylinder bore 101 a.
  • the suction chamber 119 is disposed on the center side in the diametric direction of the cylinder head 104 (on the extended axial line of the drive shaft 106 ), and the discharge chamber 120 is disposed on the outer side in the diametric direction of the cylinder head 104 so as to be in an annular form encircling the suction chamber 119 .
  • suction ports 103 a through which the cylinder bores 101 a (compression chambers of pistons 117 ) communicate with the suction chamber 119 in the cylinder head 104 , and discharge ports 103 b through which the cylinder bores 101 a (compression chambers of pistons 117 ) communicate with the discharge chamber 120 in the cylinder head 104 , are formed.
  • a one-way valve (not illustrated) is provided in each suction port and each discharge port.
  • a suction passage 104 a for introducing a refrigerant drawn from an external refrigerant circuit into the suction chamber 119 , and a discharge passage 104 b for leading out a refrigerant discharged into the discharge chamber 120 to the external refrigerant circuit, are provided. Accordingly, the suction chamber 119 is connected to an air-conditioning system side via the suction passage 104 a and the discharge chamber 120 is connected to the air-conditioning system side via the discharge passage 104 b.
  • variable displacement compressor 100 rotation of the drive shaft 106 is converted by the swash plate 107 being a conversion mechanism into reciprocal movement of each piston 117 , to draw and discharge the refrigerant.
  • the displacement can be changed by changing the stroke of each piston 117 by adjusting the inclination angle of the swash plate 107 , and the inclination angle of the swash plate 107 is changed by the pressure in the crank chamber 105 .
  • a displacement control valve 200 is provided in the cylinder head 104 .
  • the displacement control valve 200 changes the opening degree of a gas supply passage 121 through which the discharge chamber 120 communicates with the crank chamber 105 , to adjust an introduction amount of a discharge gas into the crank chamber 105 .
  • a refrigerant in the crank chamber 105 flows into the suction chamber 119 via a gas-extraction passage that passes through gaps between the drive shaft 106 and the bearings 115 and 116 , a space 122 and an orifice 103 c formed in the valve plate 103 .
  • the opening degree of the displacement control valve 200 it is possible to change the pressure in the crank chamber 105 to change the inclination angle of the swash plate 107 , and thereby to change the displacement.
  • the pressure in the suction chamber 119 is introduced into the displacement control valve 200 via a communication passage 123 , and the displacement control valve 200 adjusts the introduction amount of the discharge gas into the crank chamber 105 so that the suction chamber 119 maintains a predetermined pressure.
  • FIGS. 2 to 4 an oil recirculation mechanism will be described with reference to FIGS. 2 to 4 , which separates a lubrication oil from a refrigerant discharged from a compressing mechanism (compressing mechanism that is constituted by a piston 117 and the like, and compresses a refrigerant sucked from an external refrigerant circuit and discharges the compressed refrigerant) and returns the separated lubrication oil to a suction pressure region of the compressing mechanism.
  • a compressing mechanism compressor mechanism that is constituted by a piston 117 and the like, and compresses a refrigerant sucked from an external refrigerant circuit and discharges the compressed refrigerant
  • the oil recirculation mechanism includes an oil separation portion for separating an oil from the discharged refrigerant, an oil storage chamber for storing the separated oil, an oil return passage through which the oil storage chamber communicates with a suction pressure region, and a depressurizing device provided in the oil return passage.
  • the discharge passage 104 b is constituted by a lead-out hole 104 b 1 that is an upward hole provided in an upper region of the cylinder head 104 and connected to an external refrigerant circuit; a separation chamber 104 b 2 that has a cylindrical shape of which diameter is greater than that of the lead-out hole 104 b 1 and disposed substantially coaxially with the lead-out hole 104 b 1 and below the lead-out hole 104 b 1 ; an separation pipe 130 projecting into the separation chamber 104 b 2 and press-fit into and fixed to the lead-out hole 104 b 1 ; and an introduction hole 104 b 3 extending in a direction substantially perpendicular to the axial line of the separation chamber 104 b 2 and opening along an inner wall of the separation chamber 104 b 2 , through which the separation chamber 104 b 2 communicates with the discharge chamber 120 .
  • a gas-state refrigerant that is discharged from each cylinder bore 101 a into the discharge chamber 120 and contains an oil, flows through the introduction hole 104 b 3 into the separation chamber 104 b 2 , and while the refrigerant whirls around the separation pipe 130 , an oil is separated and a gas-state refrigerant is discharged through the inside of the separation pipe 130 and the lead-out hole 104 b 1 into the external refrigerant circuit.
  • the introduction hole 104 b 3 , the separation chamber 104 b 2 and the separation pipe 130 constitute an oil separation portion for separating an oil from the discharged refrigerant.
  • an oil storage chamber 132 is provided.
  • the oil storage chamber 132 extends in the diametric direction of the cylinder head 104 and has an open end which opens downwardly at the outer face of the cylinder head 104 , the oil storage chamber 132 is formed so that its opening area increases toward the open end, and the oil storage chamber 132 at the open end side has a cylindrical shape. The open end is occluded by the occluding member 134 .
  • the oil storage chamber 132 has a region bulging into the suction chamber 119 and the discharge chamber 120 so as to suppress increase of size of the compressor.
  • An open end of the separation chamber 104 b 2 opens directly into a region of the oil storage chamber 132 opposing to the occluding member 134 , and an oil separated in the separation chamber 104 b 2 drops directly into the oil storage chamber 132 and is stored. That is, the open end of the separation chamber 104 b 2 acts as a role of an oil introduction hole into the oil storage chamber 132 .
  • a bulge portion 132 a is provided so as to bulge into a region more inside than the opening of the open end, and the bulge portion 132 a forms a partition wall separating the oil storage chamber 132 from the suction chamber 119 .
  • a through-hole 132 b being an oil return passage having one end which opens into the oil storage chamber 132 and the other end which opens into the suction chamber 119 , is formed linearly so that the through-hole can be observed from the opening of the open end.
  • FIG. 5 is an enlarged view illustrating the orifice with a filter.
  • the orifice 136 includes an orifice member 136 a having a pipe shape and limiting a flow rate by its inner diameter, and a filter 136 b made of a resin and covering an oil chamber side opening of the orifice member 136 a .
  • the filter 136 b is constituted by a frame 136 b 1 having a tubular shape and a filter member 136 b 2 attached to the inner face of the frame 136 b 1 .
  • the filter 136 b is disposed so as to protrude into the oil storage chamber 132 so that the tip of the filter 136 b 1 faces in proximity to the tip of the occluding member 134 . That is, the occluding member 134 also functions of preventing the orifice 136 from coming out from the through-hole 132 b.
  • an o-ring 138 being a sealing member is provided, and the orifice 136 is retained in the through-hole 132 b by elasticity of the o-ring 138 .
  • the diameter of the orifice 136 that is the inner diameter of the pipe-shaped orifice member 136 a , is set so that an oil is stored in the oil storage chamber 132 .
  • an oil separated in the separation chamber 104 b 2 is stored in the oil storage chamber 132 , and an oil stored in the oil storage chamber 132 is returned to the suction chamber 119 through the orifice 136 (orifice member 136 a ) by a pressure difference between the oil storage chamber 132 and the suction chamber 119 .
  • the above oil recirculation mechanism provides the following effects.
  • the oil return passage (through-hole 132 b ) is linearly provided in a region of the oil storage chamber 132 more inside than the open end and the orifice with a filter is provided in the oil return passage (through-hole 132 b ), it is possible to accommodate the oil recirculation mechanism compactly.
  • the oil storage chamber 132 extends in the diametric direction of the cylinder head 104 and has an open end which opens downwardly at the outer face of the cylinder head 104 , and the oil storage chamber 132 is formed so that its opening area increases toward the open end, the volume increases toward a lower region (occluding member 134 side) of the oil storage chamber 132 .
  • the oil storage chamber 132 extends in the diametric direction of the cylinder head 104 and has an open end which opens downwardly at the outer face of the cylinder head 104 , and the oil storage chamber 132 is formed so that its opening area increases toward the open end, the volume increases toward a lower region (occluding member 134 side) of the oil storage chamber 132 .
  • a cylinder head 104 in which the suction chamber 119 is disposed on an extended line of the axis of a drive shaft 106 and the discharge chamber 120 is disposed in an annular form so as to encircle the suction chamber 119 in the diametric direction, it is possible to easily dispose an oil introduction hole into the oil storage chamber 132 in an upper region of the cylinder head 104 , and accordingly, it is possible to obtain a space for the oil storage chamber 132 in a lower region of the cylinder head 104 without significantly increasing the size of the compressor.
  • the depressurizing device (orifice 136 ) has a filter 136 b covering an oil storage chamber side opening of the depressurizing device, and the filter 136 b protrudes into the oil storage chamber so that the tip of the filter 136 b faces in proximity to the tip of the occluding member 134 .
  • the occluding member 134 functions of preventing the filter 136 b and the orifice 136 from coming out from the through-hole 132 b , and it is not necessary to fix the depressurizing device (orifice 136 ) to the housing and thus attachment becomes easy. Further, since the depressurizing device (orifice 136 ) can be removed easily by removing the occluding member 134 , such a construction is excellent in maintainability.
  • the oil storage chamber 132 extends in the vertical direction so that the open end is on the lower side, and the oil introduction hole (open end of the separation chamber 104 b 2 ) into the oil storage chamber 132 is formed in a region opposing to the opening of the open end, and thus, it is possible to easily form the oil introduction hole from the open end side of the oil storage chamber 132 .
  • the oil storage chamber 132 is formed so that its opening area increases toward the open end, the volume increases toward a lower region (occluding member 134 side) of the oil storage chamber 132 and it is possible to obtain an oil-storing space effectively and to form the oil storage chamber easily by casting.
  • the oil separation portion is of a centrifugal separation type employing a separation pipe 130 in the above embodiments, but the separation pipe 130 is not necessarily employed.
  • the oil separation portion may be of another separation type such as a collision separation type, or a region in the discharge chamber 120 in which an oil tends to be accumulated may communicate with the oil separation chamber 132 .
  • the oil storage chamber 132 extends in the vertical direction so that the open end is on the lower side, but the construction is not necessarily limited thereto, and the oil storage chamber 132 may be disposed so as to be inclined so that the open end is on the lower side.
  • FIG. 6 illustrates an oil storage chamber constituted by two cylindrical portions including a large diameter portion 132 c and a small diameter portion 132 d , in which the axis of the large diameter portion 132 c is off the axis of the small diameter portion 132 d so as to form a through-hole 132 b (a partition wall separating the oil storage chamber from the suction chamber and a through-hole 132 b formed therethrough) in a region inside the opening of the open end.
  • a through-hole 132 b a partition wall separating the oil storage chamber from the suction chamber and a through-hole 132 b formed therethrough
  • a fixed orifice is employed as the depressurizing device, and, as the depressurizing device, a variable orifice or a valve of which opening degree is variable may be employed.
  • the suction chamber 119 is disposed on an extended line of the axis of a drive shaft 106 and the discharge chamber 120 is disposed in an annular form so as to encircle the suction chamber 119 in the diametric direction.
  • the arrangement in which the discharge chamber 120 is disposed on an extended line of the axis of a drive shaft 106 and the suction chamber 119 is disposed in an annular form so as to encircle the discharge chamber 120 in the diametric direction may be employed.
  • a reciprocation type variable displacement compressor is employed as the refrigerant compressor, and the refrigerant compressor may be a fixed displacement compressor. Furthermore, the compressor may be employs another compressing mechanism such as a scroll compressor or a vane compressor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US13/997,552 2010-12-24 2011-11-17 Refrigerant Compressor Abandoned US20130287618A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2010287025A JP5413851B2 (ja) 2010-12-24 2010-12-24 冷媒圧縮機
JP2010-287025 2010-12-24
PCT/JP2011/076544 WO2012086348A1 (ja) 2010-12-24 2011-11-17 冷媒圧縮機

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US20130287618A1 true US20130287618A1 (en) 2013-10-31

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US13/997,552 Abandoned US20130287618A1 (en) 2010-12-24 2011-11-17 Refrigerant Compressor

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US (1) US20130287618A1 (de)
JP (1) JP5413851B2 (de)
CN (1) CN103270301B (de)
DE (1) DE112011104522B4 (de)
WO (1) WO2012086348A1 (de)

Cited By (2)

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WO2017164539A1 (ko) * 2016-03-23 2017-09-28 한온시스템 주식회사 압축기
CN108386357A (zh) * 2018-04-18 2018-08-10 北京燕都碧城科技有限公司 一种单螺杆压缩机防液击装置

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KR20170008602A (ko) * 2015-07-14 2017-01-24 한온시스템 주식회사 양두 사판식 압축기
CN113819397A (zh) * 2021-09-22 2021-12-21 三一汽车制造有限公司 气体回收装置、压缩机、氢气回收方法和加氢站

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US4472949A (en) * 1982-03-26 1984-09-25 Clarion Co., Ltd. Oil separator
US5159820A (en) * 1989-07-05 1992-11-03 Nippondenso Co., Ltd. Oil separator integrally mounted on compressor
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US6227831B1 (en) * 1998-06-24 2001-05-08 Denso Corporation Compressor having an inclined surface to guide lubricant oil
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017164539A1 (ko) * 2016-03-23 2017-09-28 한온시스템 주식회사 압축기
US10662936B2 (en) * 2016-03-23 2020-05-26 Hanon Systems Compressor
CN108386357A (zh) * 2018-04-18 2018-08-10 北京燕都碧城科技有限公司 一种单螺杆压缩机防液击装置

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JP2012132408A (ja) 2012-07-12
WO2012086348A1 (ja) 2012-06-28
JP5413851B2 (ja) 2014-02-12
CN103270301A (zh) 2013-08-28
CN103270301B (zh) 2015-06-24
DE112011104522B4 (de) 2017-05-18

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