EP1085211A2 - Soupape de refoulement pour compresseurs - Google Patents

Soupape de refoulement pour compresseurs Download PDF

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Publication number
EP1085211A2
EP1085211A2 EP00119768A EP00119768A EP1085211A2 EP 1085211 A2 EP1085211 A2 EP 1085211A2 EP 00119768 A EP00119768 A EP 00119768A EP 00119768 A EP00119768 A EP 00119768A EP 1085211 A2 EP1085211 A2 EP 1085211A2
Authority
EP
European Patent Office
Prior art keywords
valve body
opening
base plate
valve
closing device
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.)
Withdrawn
Application number
EP00119768A
Other languages
German (de)
English (en)
Other versions
EP1085211A3 (fr
Inventor
Yasushi Watanabe
Kazuhiro Kuroki
Hiroyuki Gennami
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.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Toyoda Jidoshokki Seisakusho KK
Toyoda Automatic Loom Works 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 Toyota Industries Corp, Toyoda Jidoshokki Seisakusho KK, Toyoda Automatic Loom Works Ltd filed Critical Toyota Industries Corp
Publication of EP1085211A2 publication Critical patent/EP1085211A2/fr
Publication of EP1085211A3 publication Critical patent/EP1085211A3/fr
Withdrawn legal-status Critical Current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
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving

Definitions

  • the present invention relates to an opening and closing device for a gas passage in a compressor.
  • a discharge port is opened and closed by a flapper type discharge reed valve and the opening degree of the valve is restricted by a retainer.
  • the flexible discharge valve opens the discharge port when the difference between the pressure in the front area of the valve and the pressure in the rear area of the valve exceeds the elasticity of the valve.
  • the gas has to be compressed so that its pressure exceeds the elasticity to open the valve. Such gas compression causes power loss of the compressor.
  • Float type valves which are disclosed in Japanese Unexamined Utility Model Publication No. 5-981, Japanese Unexamined Patent Publications No. 5-10257, No. 5-33764, No. 5-33769 and No. 11-182469 have movable valve bodies in gas passages between the opened position in which gas flow is permitted and the closed position stopping gas flow. These valves solve the problem of power loss caused by the flapper type flexible discharge valve.
  • the thickness of the valve body is selected to be as thin as possible.
  • the thinner the thickness of the valve body is, the more it tends to tilt, due to the clearance. It also becomes more difficult for the valve body to return quickly to the original closed position. That is, if the valve body is made thinner to improve the response, it tends to tilt, so that it actually becomes more difficult to improve the response.
  • the compressor according to the present invention has a mechanical guide to permit movement of the valve body between the opened position in which gas flows through the valve, and the closed position in which gas flow is stopped, the valve movement being substantially parallel to the flow of the gas.
  • a center housing 12 is secured to a stationary scroll 11, and a motor housing 13 is secured to the opposite end of the housing 12.
  • a drive shaft 14 is rotatably supported by the center housing 12 and the motor housing 13 via radial bearings 15 and 16 respectively.
  • An eccentric shaft 17 is integrally formed with the drive shaft 14.
  • a balance weight 18 and a bushing 19 are supported on the eccentric shaft 17.
  • a movable scroll member 20 facing the stationary scroll member 11 is rotatably supported by the bushing 19 via a needle bearing 21.
  • the needle bearing 21 is accommodated in a boss 332 which is a protrusion on the back of a base plate 33 of the movable scroll member 20.
  • the movable scroll member 20 orbits about the axis of the drive shaft 14 as the eccentric shaft 17 rotates with the shaft 14, to which it is attached, and the balance weight 18 cancels the centrifugal force generated by the orbital movement of the movable scroll member 20.
  • the eccentric shaft 17 and the bushing 19, which are integrally rotated with the drive shaft 14, and the needle bearing 21 arranged between the eccentric shaft 17 and the boss 332 of the movable scroll member 20, constitute an orbital movement mechanism.
  • An orbiting ring 22 is arranged between the movable scroll base plate 33 and the center housing 12.
  • An annular pressure receiving plate 24 is arranged between the center housing 12 and the ring 22. As shown in Fig. 3, the same number of holes 241 as pins 23 are arranged circumferentially in the pressure receiving plate 24. And the same number of holes 331 as the pins 23 are arranged circumferentially in the movable scroll base plate 33. Both the holes 241 and 331 are arranged at equiangular spacing distances from each other. The end portions of the pins 23 are inserted into the holes 241 and 331.
  • a stator 27 is fixed on an inner peripheral wall of the motor housing 13, and a rotor 28 is supported on the drive shaft 14.
  • the stator 27 and the rotor 28 constitute a motor. When the stator 27 is energized, the rotor 28 and the drive shaft 14 integrally rotate.
  • the movable scroll member 20 orbits about the axis of the shaft 14 as the eccentric shaft 17, which is integrally formed with the drive shaft 14, rotates.
  • the refrigerant gas introduced through an inlet 111 flows into the space between the stationary scroll base plate 31 and the movable scroll base plate 33, from the radially outer side of both scroll members 11 and 20.
  • the peripheral surfaces of the pins 23 slide along the peripheral surfaces of the holes 331 and 241 as the movable scroll member 20 orbits.
  • the orbiting radius of the movable scroll member 20 is r and the orbiting radius of the ring 22 is half of the orbiting radius r, i.e., r/2, of the movable scroll member 20.
  • the ring 22 tends to self-rotate. But the self rotation does not occur, because more than three pins 23 are contacting the inner peripheral surfaces of the holes 241 which are arranged at fixed positions. And the movable scroll member 20 also tends to self-rotate. However, that does not occur either, because the inner peripheral surfaces of the holes 331 in the movable scroll base plate 33 are contacting more than three pins 23 on the ring 22 which does not self-rotate. That is, the movable scroll member 20 and the ring 22 do not self-rotate, but they orbit.
  • the closed spaces S1 and So shown in Fig. 4 diminish their capacities when the movable scroll member 20 orbits, and converge toward the inner ends 321 and 341 of the scroll walls 32 and 34 of the scroll members 11 and 20.
  • a discharge port 25 is formed in the movable scroll base plate 33.
  • the discharge port 25 is communicated with the final closed space So.
  • a cylindrical accommodation chamber 26 is formed on the back of the movable scroll base plate 33.
  • the accommodation chamber 26 is communicated with the discharge port 25.
  • a valve body 29 as shown, for example, in Fig. 2(a) is floatably and movably accommodated in the accommodation chamber 26.
  • the valve body 29 comprises a disk shaped base plate 291 and a plurality of guide pieces 292 (four guide pieces in this embodiment).
  • the guide pieces 292 are integrally and circumferentially formed on the base plate 291 at equal intervals with each other.
  • the guide pieces 292 protrude from the back 293 of the base plate 291 so that they are perpendicular to the base plate 291.
  • the outer surfaces of the guide pieces 292 correspond with the periphery of the base plate 291 in the direction of the axis of the valve body 29. That is, the outer surfaces of the plurality of the guide pieces 292 conform to the circumference of a circle whose center is the axis L of the base plate 291.
  • the diameter of the base plate 291 is slightly smaller than that of the accommodation chamber 26.
  • An annular groove 262 is formed on the inner wall of the accommodation chamber 26, and a circular clip 30 is inserted in the groove 262.
  • a plurality of gas passages 261 are formed on the circular inner wall of the accommodation chamber 26.
  • the valve body 29 is floatably and movably accommodated in the accommodation chamber 26 and is moved between the valve-closed position and the valve-opened position. At the closed position the valve body 29 contacts the step between the discharge port 25 and the accommodation chamber 26, namely, the bottom surface 263 of the accommodation chamber 26, and closes the discharge port 25 as shown in Fig. 1(a) in solid lines.
  • the tips of the guide pieces 292 of the valve body 29 contact the circular clip 30 and open the discharge port 25 as shown in dotted lines in Fig. 1(a). That is, the accommodation chamber 26, the valve body 29 and the circular clip 30 provide an opening and closing device for the gas passage or port 25.
  • the refrigerant gas is compressed in accordance with decreasing capacity of the closed spaces S1 and So as the movable scroll member rotates.
  • the compressed refrigerant gas is discharged from the final closed space So through the discharge port 25 and the gas passages 261 to the space 35 surrounded by the boss 332.
  • the space 35 is communicated with the space 36 outside the boss 332 via the gap of the needle bearing 21.
  • the space 36 is communicated with the inside of the motor housing 13 through a passage 37.
  • the refrigerant gas in the motor housing 13 is discharged out to an external refrigerant circuit 38, through a passage 141 inside the drive shaft 14 and an outlet 131 on the end wall of the motor housing 13.
  • the invention has the following effects.
  • Fig. 5(a) is a partial cross-sectional view showing that the valve body 29 of the invention does not tilt.
  • Fig. 5(b) is a partial cross-sectional view showing that a conventional prior art valve body 29A, without guide pieces 292, tends to tilt. Tilting of the valve body 29 is prevented by the guide pieces 292. This is because the outer circumferential surfaces 295 of each guide piece 292, which correspond to a circle whose center is the axis L of the base plate 291, and the outer circumferential surface 296 of the base plate 291, contact the inner circumferential surface 264 of the accommodation chamber 26 when the valve body 29 tends to tilt.
  • the guide pieces 292 are formed on the valve body 29 to extend in the direction of movement of the valve body 29, so that they are slidable on the inner circumferential surface 264 of the accommodation chamber 26 in the gas passage.
  • the guide pieces 292 and the inner circumferential surface 264 of the accommodation chamber 26 provide a mechanical guide for moving the valve body 29 in the direction of gas flow.
  • the compressor has mechanical guide to guide the movement of the valve body between the opened position of the valve to permit flow of gas therethrough and the closed position in which gas flow is stopped, the movement of the valve body being substantially parallel to the direction of gas flow. Accordingly, the invention performs with spectacular effect to improve the response of a movable valve body as the opening and closing device for a gas passage.
  • An opening and closing device for a compressor gas passage such as a compressor discharge passage, includes a valve body which moves between an opened position in which gas flows through the passage and a closed position in which gas flow is stopped.
  • a discharge port of the compressor which leads to the discharge passage, has an accommodation chamber formed therearound in the base plate of the movable scroll.
  • the valve body is floatably and movably accommodated in the accommodation chamber, to move in the direction of gas flow.
  • the valve body has guide pieces which protrude in the direction of valve movement from respective equally spaced locations along the circumference of the valve body. The valve body moves between a valve-closed position in which it closes the discharge port, contacting the bottom surface of the discharge port and the accommodation chamber and a valve-opened position in which it opens the discharge port, contacting a circular clip which limits its movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
EP00119768A 1999-09-20 2000-09-11 Soupape de refoulement pour compresseurs Withdrawn EP1085211A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP26570699A JP2001082338A (ja) 1999-09-20 1999-09-20 圧縮機における流路開閉装置
JP26570699 1999-09-20

Publications (2)

Publication Number Publication Date
EP1085211A2 true EP1085211A2 (fr) 2001-03-21
EP1085211A3 EP1085211A3 (fr) 2002-01-30

Family

ID=17420890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00119768A Withdrawn EP1085211A3 (fr) 1999-09-20 2000-09-11 Soupape de refoulement pour compresseurs

Country Status (2)

Country Link
EP (1) EP1085211A3 (fr)
JP (1) JP2001082338A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7429167B2 (en) * 2005-04-18 2008-09-30 Emerson Climate Technologies, Inc. Scroll machine having a discharge valve assembly
GB2514639A (en) * 2013-03-13 2014-12-03 Agilent Technologies Inc Scroll pump having bellows providing angular synchronization and back-up system for bellows
US9328730B2 (en) 2013-04-05 2016-05-03 Agilent Technologies, Inc. Angular synchronization of stationary and orbiting plate scroll blades in a scroll pump using a metallic bellows
US9366255B2 (en) 2013-12-02 2016-06-14 Agilent Technologies, Inc. Scroll vacuum pump having external axial adjustment mechanism
CN110966184A (zh) * 2019-12-19 2020-04-07 苏州旋凌科技有限公司 具有主动泄压结构的涡旋
CN113236558A (zh) * 2021-05-27 2021-08-10 珠海格力节能环保制冷技术研究中心有限公司 涡旋压缩机排气组件、涡旋压缩机和空调系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100376798C (zh) * 2004-05-28 2008-03-26 日立空调·家用电器株式会社 涡旋压缩机
JP2023040761A (ja) * 2021-09-10 2023-03-23 ダイキン工業株式会社 圧縮機、および、空気調和装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4228820A (en) * 1977-12-30 1980-10-21 The Yorde Machine Products Company Seat guided poppet valve having flow and dampening control means
JPS5862397A (ja) * 1981-10-12 1983-04-13 Sanden Corp スクロ−ル型圧縮機
EP0354161A2 (fr) * 1988-08-02 1990-02-07 Carrier Corporation Dispositif silencieux et soupape antiretour pour compresseur à spirales
US5346373A (en) * 1993-06-17 1994-09-13 White Consolidated Industries, Inc. Refrigeration compressor having a spherical discharge valve
JPH06264875A (ja) * 1993-03-10 1994-09-20 Toyota Autom Loom Works Ltd スクロール型圧縮機
FR2746146A1 (fr) * 1996-03-12 1997-09-19 Toyoda Automatic Loom Works Compresseur a deplacement variable

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4228820A (en) * 1977-12-30 1980-10-21 The Yorde Machine Products Company Seat guided poppet valve having flow and dampening control means
JPS5862397A (ja) * 1981-10-12 1983-04-13 Sanden Corp スクロ−ル型圧縮機
EP0354161A2 (fr) * 1988-08-02 1990-02-07 Carrier Corporation Dispositif silencieux et soupape antiretour pour compresseur à spirales
JPH06264875A (ja) * 1993-03-10 1994-09-20 Toyota Autom Loom Works Ltd スクロール型圧縮機
US5346373A (en) * 1993-06-17 1994-09-13 White Consolidated Industries, Inc. Refrigeration compressor having a spherical discharge valve
FR2746146A1 (fr) * 1996-03-12 1997-09-19 Toyoda Automatic Loom Works Compresseur a deplacement variable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 153 (M-226), 5 July 1983 (1983-07-05) -& JP 58 062397 A (SANKYO DENKI KK), 13 April 1983 (1983-04-13) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7429167B2 (en) * 2005-04-18 2008-09-30 Emerson Climate Technologies, Inc. Scroll machine having a discharge valve assembly
GB2514639A (en) * 2013-03-13 2014-12-03 Agilent Technologies Inc Scroll pump having bellows providing angular synchronization and back-up system for bellows
US9404491B2 (en) 2013-03-13 2016-08-02 Agilent Technologies, Inc. Scroll pump having bellows providing angular synchronization and back-up system for bellows
GB2514639B (en) * 2013-03-13 2020-02-19 Agilent Technologies Inc Scroll pump having bellows providing angular synchronization and back-up system for bellows
US9328730B2 (en) 2013-04-05 2016-05-03 Agilent Technologies, Inc. Angular synchronization of stationary and orbiting plate scroll blades in a scroll pump using a metallic bellows
US10294939B2 (en) 2013-04-05 2019-05-21 Agilent Technologies, Inc. Angular synchronization of stationary and orbiting plate scroll blades in a scroll pump using a metallic bellows
US9366255B2 (en) 2013-12-02 2016-06-14 Agilent Technologies, Inc. Scroll vacuum pump having external axial adjustment mechanism
CN110966184A (zh) * 2019-12-19 2020-04-07 苏州旋凌科技有限公司 具有主动泄压结构的涡旋
CN113236558A (zh) * 2021-05-27 2021-08-10 珠海格力节能环保制冷技术研究中心有限公司 涡旋压缩机排气组件、涡旋压缩机和空调系统

Also Published As

Publication number Publication date
EP1085211A3 (fr) 2002-01-30
JP2001082338A (ja) 2001-03-27

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