EP0896154A2 - Kompressor mit variabler Fördermenge mit einem im Bezug auf einer Montageposition des Kompressors verbesserten Verbindungsdurchgang zwischen einem Kurbelgehäuse und einer Saugkammer - Google Patents

Kompressor mit variabler Fördermenge mit einem im Bezug auf einer Montageposition des Kompressors verbesserten Verbindungsdurchgang zwischen einem Kurbelgehäuse und einer Saugkammer Download PDF

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Publication number
EP0896154A2
EP0896154A2 EP98114720A EP98114720A EP0896154A2 EP 0896154 A2 EP0896154 A2 EP 0896154A2 EP 98114720 A EP98114720 A EP 98114720A EP 98114720 A EP98114720 A EP 98114720A EP 0896154 A2 EP0896154 A2 EP 0896154A2
Authority
EP
European Patent Office
Prior art keywords
communication passage
compressor
chamber
crank chamber
suction chamber
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Withdrawn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
EP98114720A
Other languages
English (en)
French (fr)
Other versions
EP0896154A3 (de
Inventor
Yukihiko C/O Sanden Corporation Taguchi
Masaaki c/o Sanden Corporation Fujita
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 EP0896154A2 publication Critical patent/EP0896154A2/de
Publication of EP0896154A3 publication Critical patent/EP0896154A3/de
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F04B2027/1822—Valve-controlled fluid connection
    • F04B2027/1831—Valve-controlled fluid connection between crankcase and suction chamber
    • 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
    • F04B2027/184—Valve controlling parameter
    • F04B2027/1845—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
    • 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
    • F04B2027/184—Valve controlling parameter
    • F04B2027/185—Discharge 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
    • 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
    • F04B2027/1877—External parameters

Definitions

  • the present invention relates to a variable displacement compressor suitable for use in a vehicle air conditioner or the like.
  • Japanese Second (examined) Utility Model Publication No. 2-17186 discloses a wobble plate type variable displacement compressor as one of variable displacement compressors for use in vehicle air conditioners.
  • the disclosed compressor includes two communication passages each extending from a crank chamber to a suction chamber.
  • One of the communication passages is provided therein with a bellows valve sensitive to a crank pressure, while the other communication passage is provided therein with an electromagnetic valve or a solenoid valve. While the solenoid valve is closed, a displacement control is carried out by the bellows valve to change the crank pressure so as to keep a suction pressure essentially constant.
  • variable displacement compressor having a structure wherein oil is not liable to stay in a communication passage extending between a crank chamber and a suction chamber and including a solenoid valve therein.
  • a variable displacement compressor comprising a discharge chamber, a suction chamber, a crank chamber, displacing means placed in the crank chamber for displacing gas from the suction chamber to the discharge chamber with a variable displacement which is dependent on a pressure differential between the suction chamber and the crank chamber, a first communication passage establishing communication between the crank chamber and the suction chamber, a first control valve disposed in the first communication passage to control opening and closing of the first communication passage in dependence on the pressure differential, a second communication passage establishing communication between the crank chamber and the suction chamber and having a particular portion between the crank chamber and the suction chamber, and a second control valve disposed in the second communication passage for controlling opening and closing of the second communication passage at the particular portion, the compressor being designed to be set with a predetermined posture, the particular portion being located higher than another portion of the second communication passage in the predetermined posture.
  • variable displacement compressor according to the first preferred embodiment of the present invention will be described hereinbelow, wherein the compressor is of a wobble plate type well known in the art.
  • the shown compressor is for use in compressing refrigerant gas in a vehicle air conditioner and comprises a compressor casing 1 having a through hole at the center thereof.
  • a main shaft 2 is inserted into this through hole and rotatably supported by the casing 1 via bearings 1a and 1b.
  • the casing 1 defines therein a crank chamber 3 wherein a rotor 4 is mounted on the main shaft 2.
  • a swash plate 5 is coupled to the rotor 4 via a hinge mechanism 41 and slidably mounted on the main shaft 2.
  • An inclination of the swash plate 5 relative to the main shaft 2 can be changed by means of the hinge mechanism 41.
  • a wobble plate 6 is attached to the swash plate 5 via a bearing 51, and a plurality of piston rods 7 are coupled to the wobble plate 6 through ball connection.
  • the casing 1 is formed with a plurality of cylinders 8 which are arranged at regular intervals so as to surround the main shaft 2.
  • Each of the piston rods 7 is coupled through ball connection to corresponding one of pistons 9 disposed in the respective cylinders 8.
  • a guide rod 10 is supported by the casing 1 so as to extend in parallel to the main shaft 2.
  • the guide rod 10 is sandwiched by an end portion of the wobble plate 6 so that the end portion of the wobble plate 6 is capable of wobbling relative to the guide rod 10 in an axial direction of the main shaft 2.
  • a cylinder head 12 is attached via a valve plate 11 interposed therebetween, so as to close a right-side open end of the casing 1.
  • the cylinder head 12 is formed with a suction chamber 13 and a discharge chamber 14.
  • the suction chamber 13 communicates with a suction port 13a, while the discharge chamber 14 communicates with a discharge port (not shown).
  • the valve plate 11 is formed with suction holes 11a and discharge holes 11b.
  • the suction chamber 13 and the discharge chamber 14 communicate with the cylinders 8 via the suction holes 11a and the discharge holes 11b, respectively.
  • a suction valve (not shown), a discharge valve (not shown) and a valve retainer 15 are fixedly mounted by means of a pressure control valve 16 and a nut 17.
  • the pressure control valve 16 is referred to as a first control valve and disposed in a first communication passage 18 extending from the crank chamber 3 to the suction chamber 13. When the pressure control valve 16 is opened, the crank chamber 3 and the suction chamber 13 communicate with each other.
  • the discharge chamber 14 and the crank chamber 3 are in constant communication with each other through a fixed restrictor (not shown) so as to utilize a portion of discharged gas, in addition to blowby gas, as an increasing element for a pressure in the crank chamber 3.
  • the pressure control valve 16 comprises a valve member 161 for opening and closing the first communication passage 18, and a bellows 162 fixed to the valve member 161 and sensitive to a pressure in the crank chamber 3.
  • the inside of the bellows 162 is under vacuum and provided with a spring.
  • the pressure control valve 16 further comprises a transfer rod 164 which receives at one end surface thereof a pressure of the discharge chamber 14 and applies a resultant acting force to the valve member 161 via a spring 163, and a casing 165 forming a valve seat for the valve member 161.
  • the pressure control valve 16 controls the opening state of the valve member 161 in response to the pressure in the suction chamber 13 so as to substantially control the suction pressure. Further, in response also to the pressure in the discharge chamber 14, the pressure control valve 16 changes the suction pressure depending on the discharge pressure as shown in Fig. 3.
  • a solenoid valve 19 is disposed to open and close a second communication passage 20 extending from the crank chamber 3 to the suction chamber 13. Specifically, while the solenoid valve 19 is closed, the discharge displacement is controlled based on the suction pressure control characteristic shown in Fig. 3. On the other hand, while the solenoid valve 19 is opened, since the crank chamber 3 and the suction chamber 13 are in constant communication with each other through the second communication passage 20, there is essentially no pressure differential between the crank chamber 3 and the suction chamber 13. As a result, the inclination of the swash plate 5 becomes maximum so that the compressor is operated with the maximum piston stroke.
  • the solenoid valve 19 is referred to as a second control valve.
  • the second communication passage 20 has a particular portion 21 at which the solenoid valve 19 is disposed, an inlet side portion 22 between the crank chamber 3 and the particular portion 21, and an outlet side portion 23 between the particular portion 21 and the suction chamber 13.
  • Each of the inlet side and the outlet side portions 22 and 23 is located lower than the particular portion 21.
  • a mounting attitude of the foregoing compressor is regulated such that the main shaft 2 should be horizontal.
  • the compressor is designed to be set with a predetermined posture.
  • the inlet side portion 22 of the second communication passage 20, extending from a crank chamber side opening to a solenoid valve inlet side pressure chamber 20a, and the outlet side portion 23 of the second communication passage 20, extending from a solenoid valve outlet side pressure chamber 20b to a suction chamber side opening are positioned below a contact portion between the valve member 191 and the valve seat 192 of the solenoid valve 19.
  • crank chamber side opening of the inlet side portion 22 of the second communication passage 20 is opened at an upper portion of the inner periphery of the crank chamber 3.
  • the opening is positioned above the oil level in the crank chamber 3 so that the second communication passage 20 is not closed by the oil.
  • the foregoing two inlet side portion 22 and outlet side portion 23 of the second communication passage 20 are lowered in position toward the crank chamber 3 and the suction chamber 13, respectively.
  • the oil remaining in the two inlet side portion 22 and outlet side portion 22 flows toward the crank chamber 3 and the suction chamber 13, respectively, so that essentially no oil stays in these portions.
  • the latter portion of the second communication passage 20, that is, the outlet side portion 23 extending from the solenoid valve outlet side pressure chamber 20b to the suction chamber side opening has a tapered shape.
  • the solenoid valve 19 Since the solenoid valve 19 is positioned on the casing 1, the foregoing inlet side portion 22 of the second communication passage 20 can be set notably short.
  • variable displacement compressor according to the second preferred embodiment of the present invention will be described hereinbelow. Since the second preferred embodiment differs from the first preferred embodiment only in arrangement of a solenoid valve 19 and a second communication passage 20, the following explanation will be given only thereto. Similar parts are designated by like reference numerals.
  • the solenoid valve 19 is arranged at an upper portion of the cylinder head 12, and opens and closes the second communication passage 20 extending from the crank chamber 3 to the suction chamber 13.
  • the second communication passage 20 is positioned below a contact portion between a valve member (not shown) and a valve seat (not shown) of the solenoid valve 19.
  • a crank chamber side opening of the second communication passage 20 is opened at an upper portion of the inner periphery of the crank chamber 3.
  • a passage, of the second communication passage 20, extending from the crank chamber side opening to a solenoid valve inlet side pressure chamber 20a has a tapered shape such that the passage is lowered in position toward the crank chamber 3.
  • the second preferred embodiment can achieve effects similar to those achieved in the first preferred embodiment.
  • crank chamber side opening of the second communication passage is located above the axis of the main shaft in the foregoing mounting attitude and opened at the inner periphery of the crank chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Magnetically Actuated Valves (AREA)
EP98114720A 1997-08-05 1998-08-05 Kompressor mit variabler Fördermenge mit einem im Bezug auf einer Montageposition des Kompressors verbesserten Verbindungsdurchgang zwischen einem Kurbelgehäuse und einer Saugkammer Withdrawn EP0896154A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP210643/97 1997-08-05
JP9210643A JPH1150961A (ja) 1997-08-05 1997-08-05 可変容量圧縮機
JP21064397 1997-08-05

Publications (2)

Publication Number Publication Date
EP0896154A2 true EP0896154A2 (de) 1999-02-10
EP0896154A3 EP0896154A3 (de) 1999-07-07

Family

ID=16592714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98114720A Withdrawn EP0896154A3 (de) 1997-08-05 1998-08-05 Kompressor mit variabler Fördermenge mit einem im Bezug auf einer Montageposition des Kompressors verbesserten Verbindungsdurchgang zwischen einem Kurbelgehäuse und einer Saugkammer

Country Status (2)

Country Link
EP (1) EP0896154A3 (de)
JP (1) JPH1150961A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000199478A (ja) 1998-10-30 2000-07-18 Toyota Autom Loom Works Ltd 可変容量型圧縮機
JP2010209680A (ja) * 2007-08-16 2010-09-24 Sanden Corp 開放型ピストン式圧縮機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174191A (en) * 1978-01-18 1979-11-13 Borg-Warner Corporation Variable capacity compressor
GB2153922A (en) * 1984-02-02 1985-08-29 Sanden Corp Compressor capacity control
US4702677A (en) * 1986-03-06 1987-10-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Variable displacement wobble plate type compressor with improved wobble angle return system
EP0257784A1 (de) * 1986-07-23 1988-03-02 Sanden Corporation Schiefscheibenverdichter mit Vorrichtung zur Hubveränderung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174191A (en) * 1978-01-18 1979-11-13 Borg-Warner Corporation Variable capacity compressor
GB2153922A (en) * 1984-02-02 1985-08-29 Sanden Corp Compressor capacity control
US4702677A (en) * 1986-03-06 1987-10-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Variable displacement wobble plate type compressor with improved wobble angle return system
EP0257784A1 (de) * 1986-07-23 1988-03-02 Sanden Corporation Schiefscheibenverdichter mit Vorrichtung zur Hubveränderung

Also Published As

Publication number Publication date
JPH1150961A (ja) 1999-02-23
EP0896154A3 (de) 1999-07-07

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