WO1999028627A1 - Compresseur sans embrayage de type a plateau incline, ayant une capacite variable - Google Patents

Compresseur sans embrayage de type a plateau incline, ayant une capacite variable Download PDF

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Publication number
WO1999028627A1
WO1999028627A1 PCT/JP1998/005483 JP9805483W WO9928627A1 WO 1999028627 A1 WO1999028627 A1 WO 1999028627A1 JP 9805483 W JP9805483 W JP 9805483W WO 9928627 A1 WO9928627 A1 WO 9928627A1
Authority
WO
WIPO (PCT)
Prior art keywords
discharge
chamber
swash plate
passage
refrigerant gas
Prior art date
Application number
PCT/JP1998/005483
Other languages
English (en)
Japanese (ja)
Inventor
Takeo Mizushima
Original Assignee
Zexel Corporation
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 Zexel Corporation filed Critical Zexel Corporation
Publication of WO1999028627A1 publication Critical patent/WO1999028627A1/fr

Links

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
    • F04B27/14—Control
    • F04B27/16—Control of pumps with stationary cylinders
    • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B27/1804—Controlled by crankcase pressure
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • F04B27/14—Control
    • F04B27/16—Control of pumps with stationary cylinders
    • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B27/1804—Controlled by crankcase pressure
    • F04B2027/1863—Controlled by crankcase pressure with an auxiliary valve, controlled by
    • F04B2027/1881—Suction pressure

Definitions

  • the present invention relates to a variable-capacity swash plate-type clutchless compressor, and more particularly, to a variable-capacity swash-plate-type clutchless compressor to which engine driving force is constantly transmitted. About the lesser. Background art
  • variable displacement swash plate type clutchless compressor with a minimum discharge capacity of zero is used as a clutchless compressor, the heat load will decrease. At that time (at the time of the clutch phase of the compressor with a clutch), the refrigerant cools the evaporator, and frost forms on the surface of the evaporator. However, the evaporator freezes and ventilation becomes difficult, and the cooling function may be impaired.
  • the discharge chamber and the crank chamber are communicated by the control valve, and the high-pressure refrigerant gas in the discharge chamber flows to the crank chamber, and the refrigerant gas is almost moved to the capacitor side. Not flowing.
  • the inclination angle of the swash plate is at a minimum (at the time of the minimum strain stroke)
  • most of the refrigerant gas circulates inside the compressor and the refrigeration capacity is reduced to zero. can do.
  • the sliding parts are sufficiently lubricated and cooled.
  • the spring for biasing the shut-off body may rotate together with the shut-off body to break the screw, making it impossible to open and close the suction passage. I did.
  • the present invention has been made in view of such circumstances, and its object is to facilitate management of seals against outside air, suppress noise, and further improve reliability. It is an object of the present invention to provide a variable-capacity swash plate-type clutchless compressor that can be used. Disclosure of the invention
  • a variable-capacity swash plate type clutchless compressor is slidably and tiltably mounted on a rotating shaft and rotates integrally with the rotating shaft.
  • the pressure difference between the discharge chamber and the suction chamber that closes the discharge passage can and equal to or less than a predetermined value ejection
  • An outlet control valve is provided.
  • the discharge passage is blocked by the discharge control valve, so that the refrigerant gas is prevented from flowing out from the discharge port to the condenser, and the refrigerant gas is discharged. Circulates internally.
  • this discharge control valve By employing this discharge control valve, there is no need to mount a mechanism for opening and closing the suction passage on the rotating shaft, and the suction chamber can be located outside the discharge chamber in the housing. Since it is possible, it is easy to manage the seal with the outside air.
  • the spring for applying the preload to the rotating shaft does not break as the rotating shaft rotates and does not break the screw, making it impossible to open and close the suction passage, improving the reliability of the compressor. I do.
  • the rotating shaft is stabilized in the axial direction, and noise due to vibration can be suppressed.
  • the discharge control valve is a spool valve, and one of the spool valves is configured to urge one of the spool valves with the pressure of the suction chamber.
  • the urging force of the member acts and the pressure of the discharge chamber acts on the other side of the spool valve.
  • the spool valve linearly reciprocates according to the pressure in the suction chamber and the difference between the urging force of the urging member and the pressure in the discharge chamber, and opens and closes the discharge passage.
  • FIG. 1 is a longitudinal sectional view showing a variable-capacity swash plate type clutchless compressor according to one embodiment of the present invention.
  • FIG. 2 is an arrow view along the line II-II of FIG.
  • FIG. 3 is an enlarged vertical sectional view showing a state where the discharge passage is opened.
  • FIG. 4 is an enlarged vertical sectional view showing a state in which the discharge passage is closed.
  • FIG. 1 is a longitudinal sectional view showing a variable-capacity swash plate type clutchless compressor according to one embodiment of the present invention
  • FIG. 2 is an arrow along the line II-II in FIG. FIG.
  • One end of the cylinder block 1 of this variable displacement swash plate type clutchless compressor has a lid head 3 via a valve plate 2 and a floating head on the other end. Each head 4 is fixed.
  • the cylinder block 1 is provided with a plurality of cylinder bores 6 at predetermined intervals in a circumferential direction around a shaft (rotating shaft) 5.
  • a piston 7 is slidably accommodated in each of the cylinder pores 6.
  • Cylinder block 1 is provided with discharge port 1a which leads to the inlet of capacitor 84.
  • a crank chamber 8 is formed in the front head 4, and a swash plate 10 is accommodated in the crank chamber 8. Slant On the sliding surface 10 a of the plate 10, a retainer 50 supporting the spherical end portion 11 a of the connecting grid 11 1 so as to be able to relatively roll is provided with a retainer 5 3. It is held at.
  • a bearing 55 is attached to the boss 10 b of the swash plate 10, and a retainer 53 is attached to the boss 1 O b of the swash plate 10 via the bearing 55. 3 is rotatable relative to the swash plate 10. The bearing 55 is prevented from coming off by a tongue 54 fixed to the boss 10b.
  • the other end 11 b of the connecting groove 11 is fixed to the piston 7.
  • the shoe 50 includes a shoe body 51 that supports the distal end surface of the connecting groove 11a so as to be relatively rotatable, and an end of the connecting groove 11a.
  • 1 a a ⁇ ⁇ 1 1 1 1 1 1 1 1 1.
  • a discharge chamber 12 and a suction chamber 13 are formed in the lid 3.
  • the suction chamber 13 is arranged so as to surround the discharge chamber 12 (see Fig. 2).
  • the lid 3 is provided with an inlet 3a which leads to an outlet of an evaporator (not shown).
  • a discharge passage 39 that communicates between the discharge port 1 a and the discharge chamber 12 is provided in the lid 3 and the valve plate 2.
  • FIG. 3 is an enlarged vertical sectional view showing a state in which the discharge passage 39 is open
  • FIG. 4 is an enlarged vertical sectional view showing a state in which the discharge passage 39 is closed.
  • a discharge control valve 30 is provided in the middle of the discharge passage 39.
  • This discharge control valve 30 is a bottomed cylindrical spool valve 3 1, a spring (biasing member) 32, and a stopper ⁇ ° 56 are provided.
  • the stopper ⁇ ° 5 6 is fixed to the lid head 3 by a cap 59, the spring 32 is housed in the spool valve 31, and one end of the spring 32 is connected to the stopper. The other end of the spring 32 is in contact with the bottom of the spool valve 31.
  • the internal space 33 of the spool valve 31 is formed through a center hole 56 a of the stower 56 and a passage 83 provided in the cap 59 and the lid 3. Then, it communicates with the suction chamber 13.
  • the urging force of the spring 32 and the pressure of the suction chamber 13 act on one of the spool valves 31 in the valve closing direction (the direction in which the valve opening decreases).
  • the pressure of the discharge chamber 12 acts in the valve opening direction (the direction in which the valve opening increases).
  • FIG. 3 is an enlarged vertical sectional view showing a state in which the discharge passage is opened.
  • a control valve (pressure control valve) 81 is provided in the middle of the passage. The outlet valve 81 operates only when the heat load is large, and shuts off the passage 57.
  • the passage 58 is composed of an orifice 58 a formed in the valve plate 2 and a passage 58 b formed in the cylinder block 1.
  • the valve plate 2 includes a discharge port 16 for communicating the compression chamber 82 with the discharge chamber 12, and a suction port 15 for communicating the compression chamber 82 with the suction chamber 13. Way around Are provided at predetermined intervals.
  • the discharge port 16 is opened and closed by a discharge valve 17, and the discharge valve 17 is attached to the rear end side of the valve plate 2 on the rear head side, together with a valve retainer 18 and a port 19, nut. Fixed by G20.
  • the suction port 15 is opened and closed by a suction valve 21, and the suction valve 21 is disposed between the valve plate 2 and the cylinder block 1.
  • the radial bearing 24 and the thrust bearing 25 support the rear side of the shaft 5, and the front side of the shaft 5 is rotatably supported by the radial bearing 26.
  • a female screw 1b is provided at the center of the cylinder block 1, and an adjust nut 84 is screwed to the female screw 1b. By tightening the adjust nut 84, the preload is applied to the shaft 5 via the thrust bearing 25.
  • a pulley 90 is fixed to a front end of the shaft 5 with a bolt 92, and a belt 91 is hung on the pulley 90.
  • a thrust flange 40 for transmitting the rotation of the shaft 5 to the swash plate 10 is fixed to the shaft 5, and the thrust flange 40 is fixed to the thrust flange 40. It is supported on the inner wall surface of the front head 4 via a last bearing 33.
  • the thrust flange 40 and the swash plate 10 are connected via a hinge mechanism 41, and the swash plate 10 can be inclined with respect to an imaginary plane perpendicular to the shaft 5. .
  • the swash plate 10 is slidably and tiltably mounted on the shaft 5.
  • the hinge mechanism 41 includes a bracket 10e provided on the front surface 10c of the swash plate 10 and a linear guide provided on the bracket 10e. It is composed of a groove 10 f and a rod 43 screwed to the swash plate side end surface 40 a of the thrust flange 40.
  • the longitudinal axis of the guide groove 10 f is inclined at a predetermined angle with respect to the front face 10 c of the swash plate 10.
  • the spherical portion 43a of the rod 43 is fitted into the guide groove 10f so as to be relatively slidable.
  • variable capacity type swash plate type clutchless compressor Next, the operation of the variable capacity type swash plate type clutchless compressor will be described.
  • the rotational power of the vehicle engine (not shown) is constantly transmitted to the pulley 90 and the shaft 5 via the belt 91, and the rotational force of the shaft 5 is changed to the thrust flange 40.
  • the swash plate 10 is transmitted to the swash plate 10 via the hinge mechanism 41, and the swash plate 10 rotates.
  • the suction valve 21 opens, and low-pressure refrigerant is sucked from the suction chamber 13 into the compression chamber 82 in the cylinder bore 6, and at the time of discharge, the discharge valve 17 opens and the compression chamber 82 High-pressure refrigerant gas is discharged from the discharge chamber 12 to the discharge chamber 12.
  • the pressure in the suction chamber 13 becomes low, and the suction chamber 13
  • the pressure difference between the discharge chamber 12 and the discharge chamber 12 exceeds a predetermined value P2
  • the spool valve 31 moves in the valve opening direction and the discharge passage 39 opens (see FIG. 3).
  • the refrigerant gas in the discharge chamber 12 is sent from the discharge port 1a to the inlet of the capacitor 84.
  • variable-capacity swash plate type clutchless compressor of this embodiment a mechanism for opening and closing the suction passage (such as a conventional transmission cylinder or a blocker) is attached to the shaft 5. Since there is no necessity, the suction chamber 13 can be arranged outside the discharge chamber 12 in the lid head 3, and the management of the seal with the outside air becomes easy. Furthermore, the spring for preloading the shaft 5 does not cut off as the shaft 5 rotates and does not prevent the suction passage from being opened and closed. Reliability is improved.
  • a sufficient preload can be applied to the shaft 5 by tightening the adjust nut 83, so that the shaft 5 and the thrust flange 40 can be moved in the axial direction. And the noise due to vibration can be suppressed.
  • the discharge control valve 31 is used as a switch.
  • a valve other than the spool valve such as a rotary valve may be used.
  • variable-capacity swash plate type clutchless compressor according to the present invention is useful as a refrigerant compressor for an air conditioner for an automobile.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne un compresseur sans embrayage de type à plateau incliné, ayant une capacité variable, qui comprend une soupape de contrôle d'évacuation (30) dans une zone intermédiaire d'un passage d'évacuation (39) conçu pour acheminer un gaz réfrigérant d'une chambre d'évacuation (12) vers un orifice d'évacuation (1a). Le passage d'évacuation (39) est bloqué par la soupape de contrôle d'évacuation (30) lorsque la différence entre la pression dans une chambre d'aspiration (13) et la pression dans la chambre d'évacuation (12) ne dépasse pas un niveau prédéterminé. En conséquence, on empêche le gaz réfrigérant de se déverser dans la direction d'un condenseur (84) depuis l'orifice d'évacuation (1a), moyennant quoi ledit gaz est mis en circulation interne. Il n'est donc pas nécessaire de prévoir l'installation d'un mécanisme pour la circulation interne du gaz réfrigérant sur un arbre (5), ce qui permet d'installer la chambre d'aspiration (13) sur le côté extérieur de la chambre d'évacuation (12), dans une tête arrière (3), l'arbre étant stabilisé axialement puisqu'une précharge suffisamment importante peut lui être affectée.
PCT/JP1998/005483 1997-12-04 1998-12-04 Compresseur sans embrayage de type a plateau incline, ayant une capacite variable WO1999028627A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9350080A JPH11173274A (ja) 1997-12-04 1997-12-04 可変容量型斜板式クラッチレスコンプレッサ
JP9/350080 1997-12-04

Publications (1)

Publication Number Publication Date
WO1999028627A1 true WO1999028627A1 (fr) 1999-06-10

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PCT/JP1998/005483 WO1999028627A1 (fr) 1997-12-04 1998-12-04 Compresseur sans embrayage de type a plateau incline, ayant une capacite variable

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JP (1) JPH11173274A (fr)
WO (1) WO1999028627A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1365150A1 (fr) * 2001-01-29 2003-11-26 Zexel Valeo Climate Control Corporation Compresseur sans embrayage a came plate a cylindree variable

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090071183A1 (en) * 2007-07-02 2009-03-19 Christopher Stover Capacity modulated compressor
JP5915576B2 (ja) * 2013-03-27 2016-05-11 株式会社豊田自動織機 ピストン型斜板式圧縮機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07127566A (ja) * 1993-11-05 1995-05-16 Toyota Autom Loom Works Ltd クラッチレス片側ピストン式可変容量圧縮機
JPH10205446A (ja) * 1996-03-12 1998-08-04 Toyota Autom Loom Works Ltd クラッチレス圧縮機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07127566A (ja) * 1993-11-05 1995-05-16 Toyota Autom Loom Works Ltd クラッチレス片側ピストン式可変容量圧縮機
JPH10205446A (ja) * 1996-03-12 1998-08-04 Toyota Autom Loom Works Ltd クラッチレス圧縮機

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1365150A1 (fr) * 2001-01-29 2003-11-26 Zexel Valeo Climate Control Corporation Compresseur sans embrayage a came plate a cylindree variable
EP1365150A4 (fr) * 2001-01-29 2006-06-07 Zexel Valeo Climate Contr Corp Compresseur sans embrayage a came plate a cylindree variable

Also Published As

Publication number Publication date
JPH11173274A (ja) 1999-06-29

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