EP1041285A2 - Verdrängerverdichter mit einer Saugkammer und Trennwände in einem Zylinderkopf - Google Patents

Verdrängerverdichter mit einer Saugkammer und Trennwände in einem Zylinderkopf Download PDF

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Publication number
EP1041285A2
EP1041285A2 EP00302566A EP00302566A EP1041285A2 EP 1041285 A2 EP1041285 A2 EP 1041285A2 EP 00302566 A EP00302566 A EP 00302566A EP 00302566 A EP00302566 A EP 00302566A EP 1041285 A2 EP1041285 A2 EP 1041285A2
Authority
EP
European Patent Office
Prior art keywords
type compressor
cylinder head
reciprocating type
partition walls
cylinder
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
EP00302566A
Other languages
English (en)
French (fr)
Other versions
EP1041285A3 (de
EP1041285B1 (de
Inventor
Kenji Hashimoto
Yoshinobu Ichikawa
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
Original Assignee
Sanden Corp
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 Sanden Corp filed Critical Sanden Corp
Publication of EP1041285A2 publication Critical patent/EP1041285A2/de
Publication of EP1041285A3 publication Critical patent/EP1041285A3/de
Application granted granted Critical
Publication of EP1041285B1 publication Critical patent/EP1041285B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1081—Casings, housings
    • 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
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • 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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/125—Cylinder heads

Definitions

  • the present invention relates to the improvement of the refrigerant gas suction passage of a reciprocating type compressor.
  • a reciprocating type compressor is arranged such that a cylinder head has a series of partition walls for separating the internal space thereof to a suction chamber and a discharge chamber.
  • the suction chamber is arranged as a common suction space without any partition and the refrigerant gas introduced from the introduction hole of the cylinder head is sequentially sucked from the suction ports of a valve plate coupled with a cylinder block according to the suction stroke of pistons (hereinafter, referred to as conventional art 1).
  • the refrigerant gases are sucked from the refrigerant introduction holes of the cylinder head to respective bores and the lengths of passages of the refrigerant gases are different depending upon respective bores. Further, since the refrigerant gases are sucked in the common suction space, pulsation is caused in the pressure of the sucked gas by the dynamic interference among the gases sucked into the respective bores. The pressure pulsation is transmitted to an evaporator in the inside of a car through piping. Thus, unpleasant noise due to resonance becomes a problem.
  • Japanese Unexamined Patent Publication No. 7-35039 discloses a technology for preventing the occurrence of noise.
  • the reciprocating type compressor disclosed in the conventional art 2 includes a cylinder block having a plurality of bores formed in parallel with a central axis, a drive shaft having an end fitted in and supported by the shaft hole of the cylinder block and the other end supported by a front housing, pistons coupled with a swash plate, which is moved together with the drive shaft, and moving linearly in the bores, a housing jointed to the outside end of the cylinder block through a valve plate and a suction unit formed on the housing and communicating with the bores through suction ports formed passing through the valve plate.
  • the suction unit is composed of a refrigerant introduction hole and pipe-shaped branch passages radially branched from the refrigerant introduction hole in six directions and independently communicating with the respective suction ports, respectively.
  • the cross sections of a series of all the refrigerant passages including the suction unit and the suctions ports are formed to have the same shape and the same size.
  • each of the branch passages communicating with the respective cylinders is formed in the pipe-shape having a relatively small diameter and has a long distance.
  • pressure losses in the branch passages are increased following the decrease in refrigerating capability.
  • one ends of respective branch ports are formed to join at the positions just below the refrigerant introduction port, the amount of refrigerant sucked into the cylinders is liable to be affected by the change of the flow rate of the refrigerant.
  • the reciprocating type compressor is also disadvantageous in that the components of a drive mechanism are undesirably vibrated to result in generation of unpleasant noise.
  • a reciprocating type compressor which comprises a cylinder block with a plurality of cylinder bores formed therein; a plurality of pistons received in the cylinder bores, respectively; a cylinder head connected to the cylinder block and having a refrigerant introduction hole; a suction chamber provided in the cylinder head and connecting the refrigerant introduction hole to the cylinder bores and which compresses a fluid introduced into the cylinder bores by the reciprocating motion of the pistons in the cylinder bores.
  • the cylinder head comprises partition walls dividing the suction chamber into fluid paths for introducing the fluid into respective cylinder bores.
  • the reciprocating type compressor 11 shown in the conventional art 2 includes a cylinder block 15 formed into one body with a main housing 12 and having a plurality of bores 13 disposed in parallel with a central axis, a drive shaft 21 having one end fitted into and supported by a shaft hole 17 of the cylinder block 15 and the other end supported by a front housing 19, pistons 25 coupled with a swash plate 23, which is moved together with the drive shaft 21, and moving linearly in the bores 13, a housing 29 jointed to the outside end of the cylinder block 15 through a valve plate 27, and a suction unit 33 communicating with the bores 13 through suction ports 31 formed to pass through the valve plate 27 formed on the housing 29.
  • the reciprocating type compressor according to the conventional art 2 employs the rotary swash plate 23 and converts a rotating motion thereof into the reciprocating motions of the pistons 25 through shoes 41.
  • the suction unit 33 is composed of a refrigerant introduction port 35 and pipe-shaped branch passages 37 which are radially branched from the refrigerant introduction port 35 in six directions and independently communicate with respective suction ports 31.
  • the suction unit 33 and a series of the refrigerant passages 37 including the suction ports 31 have the same shape and the same size.
  • numeral 39 denotes a refrigerant discharge port.
  • a reciprocating type compressor 43 of a first embodiment of the present invention includes a cylinder block 49 formed integrally with a casing or housing 47 including a plurality cylinder bores 45, and a front housing 51 disposed at an end of the housing 47. Further, the reciprocating type compressor 43 includes a rotatable shaft 55 which is inserted up to the insertion hole 53 of the cylinder block 49 in the casing 47 through the front housing 51. The rotatable shaft 55 is rotatably supported by the front housing 51 and the cylinder block 49 through bearings 57 and 59, respectively. A rotor 61 is disposed to the rotatable shaft 55 at a position near to the front housing 51 and fixed to the rotation shaft 55 by a bolt 63.
  • An end of the rotor 61 is supported by the inner wall of the front housing 51 through a thrust bearing 65 and the other thereof is coupled with an end of a slant plate 67 disposed around the rotatable shaft 55 through a hinged joint mechanism 69.
  • a wobble plate 71 is disposed around the cylindrical portion of the slant plate 67 at the central portion thereof so as to swing in accordance with a rotation of the slant plate 67 through a thrust bearing 73.
  • a groove is formed at a portion 75a of the periphery of the wobble plate 71 and engaged with a rail plate 75b disposed in the casing 47 so that it can be moved along an axial direction with preventing from rotating.
  • the wobble plate 71 and the rail plate 75b constitute a rotation preventing mechanism 77.
  • the rotation preventing mechanism 77 is arranged such that it can move the wobble plate 71 in the direction along the rotatable shaft 55 but it prevents the wobble plate 71 from rotating around the rotatable shaft 55.
  • Pistons 81 are disposed in the cylinder bores 45 of the cylinder block 49 and connected to the peripheral portion of the wobble plate 71 on the other end thereof through piston rods 83.
  • a cylinder head 87 is disposed to the other end of the cylinder block 49 of the casing 47 through a valve plate device 85.
  • the valve plate device 85 includes a valve plate main body 85a, which has a not shown suction valve and a discharge valve 89, and a retainer 91.
  • the suction valve and the discharge valve are formed on both of surfaces of the valve plate and stacked under seal members (not shown), respectively.
  • the retainer 91 is disposed so as to cover the discharge valve 89.
  • the cylinder head 87 includes a first cylinder head unit 95 disposed to the outside of the compressor and a second cylinder head unit 97 interposed between the first cylinder head unit 95 and the valve plate device 85.
  • the first cylinder head unit 95 includes a bottom wall 101 and a cylindrical side wall 103 standing vertically from the periphery of the bottom wall 101.
  • a refrigerant introduction hole 105 is formed at the center of the bottom wall 101.
  • partition walls 107 substantially extend radially inwardly from the positions of the cylindrical side wall 103 in a peripheral direction at approximately similar intervals and the extended end portions of the partition walls 107 are located radially outwardly of the refrigerant introduction hole 105.
  • voids 109 which will be hereinafter referred to as first suction chambers 109, are partitioned by adjacent partition walls 107 and portions of the side wall 103 in correspondence to the cylinder bores 45.
  • a void 111 is formed by being surrounded by the extended end portions of the partition walls 107. Note that, as can be seen from Fig.
  • the inner ends in the radial direction of the first suction chambers 109 are open to the void 111, respectively.
  • the extended end portion of one of the partition walls 107 has an elliptic cross section and a blind screw hole 115 is drilled thereto in an axial direction.
  • the extended end portion of another one of the partition walls 107 also has a circular cross section and a through-hole 113 for a discharge port 127 is drilled therethrough in the axial direction.
  • boss portions 117 are formed at the portions of the side wall 103 corresponding to the base portions of the respective the partition walls 107 and screw inserting holes 119 are drilled to the boss portions 117 in the axial direction. Note that the side wall 103, the partition walls 107 and the boss portions 117 are designed to have the same height, respectively.
  • the second cylinder head unit 97 includes a bottom wall 121 and a cylindrical thick side wall 117 standing vertically from the peripheral edge of the bottom wall 121.
  • the side wall 117 has a plurality of through-holes 123 drilled thereto in correspondence to the voids 109 of the first cylinder head unit 95.
  • the lateral cross section of each through-hole 123 is formed in an elliptic shape having a large area.
  • the through-holes 123 are referred to as second suction chambers 123.
  • the first suction chambers 109 of the first cylinder head unit 95 communicate with the second suction chambers 123 of the second cylinder head unit 97 which correspond thereto.
  • the bottom wall 121 has through-holes 125 drilled thereto at the positions thereof corresponding to the above through-holes 113 and a discharge hole 127 is formed by the through-holes 113 and 125.
  • the inside surface 129 of the side wall 117 is waved radially.
  • a discharge chamber 131 is partitioned by the side wall 117, the bottom wall 121 and the valve plate device 85.
  • a plurality of screw inserting holes 133 are drilled to the side wall 117 in correspondence to the screw inserting holes 119 of the first cylinder head unit 95.
  • shaft portions of bolts 135 pass through a plurality of screw inserting holes 133 and the screw inserting holes 85b drilled to the valve plate device 85 in correspondence to the screw inserting holes 119 and are screwed into screw holes 49a drilled to the cylinder block 49, whereby the first and second cylinder head units 95 and 97, the valve plate device 85 and the cylinder block 49 are fixed to each other.
  • the side wall 117 is formed integrally with the bottom wall 121 in the present invention, the side wall 117 may be formed separately from the bottom wall 121 and thereafter the two members may be fixed to each other.
  • refrigerant gases flow from an external refrigerant circuit into the void 111 through refrigerant introduction hole 105 and further flows into first suction chambers 109.
  • the refrigerant gases having flowed into the first suction chambers 109 further flow into the second suction chambers 123 and then sucked into the cylinder bores 45 through suction ports 139.
  • the refrigerant gases having been compressed by the pistons 81 are discharged into a discharge chamber 131 from the cylinder bores 45 through a discharge port 141 and flow to the external refrigerant circuit through the discharge port 127.
  • the refrigerant passage from the refrigerant introduction hole 105 to the cylinder bores 45 is formed of the void 111, the first suction chambers 109 and the second suction chambers 123. Therefore, the refrigerant gases having flowed from the external refrigerant circuit into the void 111 through the refrigerant introduction hole 105 flow into the first suction chambers 109 which correspond to the respective cylinder bores 45 and further are substantially isolated from each other.
  • the refrigerant gases are sucked into the respective cylinder bores 45, the mutual dynamic interference of the refrigerant gases is reduced and thus the pulsation of the suction pressure of the refrigerant gases can be suppressed. As a result, it is possible to lower the noise level in the inside of a car.
  • a large pressure loss is not caused in the refrigerant passage from refrigerant introduction hole 105 to the cylinder bores 45 because any of the void 111, first suction chambers 109 and second suction chambers 123 has a large volume.
  • the refrigerant gases having flown from the external refrigerant circuit into the void through the refrigerant introduction hole 105 is received once by the first suction chambers 109 which are isolated from each other, it is difficult for the amount of the refrigerant sucked by the cylinders to be affected by the change of the flow rate of the refrigerant supplied to the compressor, whereby the unpleasant noise generated from the parts such as a wobble plate 71 which constitute a driving mechanism can be prevented.
  • Fig. 7 is a graph showing that the pulsation of suction pressure is suppressed by the present invention described above.
  • the ordinate shows the magnitude of suction gas pulsation (unit: dBEU, wherein EU is the abbreviation of engineering unit) and the abscissa shows the flow rate (unit: kg/hour) of liquid refrigerant in the liquid line of a refrigerating circuit (portion from a condensation vessel to an expanding function element).
  • the cylinder head of a reciprocating type compressor according to a second embodiment of the present invention is arranged similarly to the cylinder head shown in Fig. 3 to Fig. 6 except the structure of a void 111 is different.
  • the void 111 is formed in a taper shape so that the diameter of the inner wall or partition wall 107 thereof is gradually increased inwardly as well as a plurality of projecting folds 107a are formed on the inner wall surface thereof.
  • Each of the projecting folds 107a has a size and shape of such a degree as not to cause a pressure loss.
  • a first cylinder head unit 95 is arranged such that a plurality of straightening plates 107b, each of which is composed of a plate member projecting in a direction perpendicular to the direction in which each partition wall 107 extends, are disposed to the partition walls 107 on both the sides in the lengthwise direction thereof.
  • Each straightening plate 107b has a size and shape of such a degree as not to cause a pressure loss.
  • pressure pulsation is more attenuated than that of the reciprocating type compressor of the first embodiment by the straightening plates 107b provided with the partition walls 107.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
EP20000302566 1999-04-01 2000-03-28 Verdrängerverdichter mit einer Saugkammer und Trennwände in einem Zylinderkopf Expired - Lifetime EP1041285B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP09493699A JP3899203B2 (ja) 1999-04-01 1999-04-01 往復動型圧縮機
JP9493699 1999-04-01

Publications (3)

Publication Number Publication Date
EP1041285A2 true EP1041285A2 (de) 2000-10-04
EP1041285A3 EP1041285A3 (de) 2002-04-03
EP1041285B1 EP1041285B1 (de) 2005-03-09

Family

ID=14123852

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000302566 Expired - Lifetime EP1041285B1 (de) 1999-04-01 2000-03-28 Verdrängerverdichter mit einer Saugkammer und Trennwände in einem Zylinderkopf

Country Status (3)

Country Link
EP (1) EP1041285B1 (de)
JP (1) JP3899203B2 (de)
DE (1) DE60018497T2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1132617A2 (de) * 2000-03-07 2001-09-12 Sanden Corporation Zylinderkopf eines Taumelscheibenkompressors mit Trennwänden
EP1637737A1 (de) * 2004-09-10 2006-03-22 Sanden Corporation Mehrzylindrige Hubkolbenverdichter
CN109145498A (zh) * 2018-09-12 2019-01-04 西安交通大学 一种压缩机系统的管路气流脉动计算方法
US10253766B2 (en) 2015-05-13 2019-04-09 Carrier Corporation Economized reciprocating compressor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4810701B2 (ja) * 2001-07-24 2011-11-09 株式会社ヴァレオジャパン 往復式冷媒圧縮機
DE102013207470B4 (de) 2013-04-24 2018-04-05 Bitzer Kühlmaschinenbau Gmbh Kältemittelverdichter
DE102018205724B4 (de) * 2018-04-16 2019-12-05 Volkswagen Aktiengesellschaft Verdichtergehäuse und Verfahren zur Montage eines Verdichtergehäuses

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070136A (en) * 1973-05-11 1978-01-24 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Apparatus for lubricating a swash plate compressor
JPS63143775U (de) * 1987-03-11 1988-09-21
JPS63280875A (ja) * 1987-05-13 1988-11-17 Toyota Autom Loom Works Ltd 斜板式圧縮機の吸入ガス案内機構
JPH079233B2 (ja) * 1987-11-21 1995-02-01 株式会社豊田自動織機製作所 圧縮機
JP3377112B2 (ja) * 1993-07-19 2003-02-17 株式会社豊田自動織機 往復動型圧縮機

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1132617A2 (de) * 2000-03-07 2001-09-12 Sanden Corporation Zylinderkopf eines Taumelscheibenkompressors mit Trennwänden
EP1132617A3 (de) * 2000-03-07 2003-01-29 Sanden Corporation Zylinderkopf eines Taumelscheibenkompressors mit Trennwänden
EP1637737A1 (de) * 2004-09-10 2006-03-22 Sanden Corporation Mehrzylindrige Hubkolbenverdichter
US7607900B2 (en) 2004-09-10 2009-10-27 Purdue Research Foundation Multi-cylinder reciprocating compressor
US10253766B2 (en) 2015-05-13 2019-04-09 Carrier Corporation Economized reciprocating compressor
CN109145498A (zh) * 2018-09-12 2019-01-04 西安交通大学 一种压缩机系统的管路气流脉动计算方法
CN109145498B (zh) * 2018-09-12 2020-10-27 西安交通大学 一种压缩机系统的管路气流脉动计算方法

Also Published As

Publication number Publication date
EP1041285A3 (de) 2002-04-03
JP3899203B2 (ja) 2007-03-28
EP1041285B1 (de) 2005-03-09
DE60018497D1 (de) 2005-04-14
JP2000291546A (ja) 2000-10-17
DE60018497T2 (de) 2005-07-28

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