EP1464839A1 - Hybrid compressor - Google Patents

Hybrid compressor Download PDF

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Publication number
EP1464839A1
EP1464839A1 EP04007456A EP04007456A EP1464839A1 EP 1464839 A1 EP1464839 A1 EP 1464839A1 EP 04007456 A EP04007456 A EP 04007456A EP 04007456 A EP04007456 A EP 04007456A EP 1464839 A1 EP1464839 A1 EP 1464839A1
Authority
EP
European Patent Office
Prior art keywords
housing
rotary shaft
speed
space
hybrid compressor
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Withdrawn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
EP04007456A
Other languages
German (de)
English (en)
French (fr)
Inventor
Masahiro Kawaguchi
Jiro Iwasa
Masao Iguchi
Masaya Sakamoto
Shinya Sato
Tomoharu Tashiro
Akihito Yamanouchi
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
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 filed Critical Toyota Industries Corp
Publication of EP1464839A1 publication Critical patent/EP1464839A1/en
Withdrawn legal-status Critical Current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
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • 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
    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C27/009—Shaft sealings specially adapted for pumps
    • 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
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0085—Prime movers
    • 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
    • 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
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • 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
    • F04C2240/00—Components
    • F04C2240/45—Hybrid prime mover
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps

Definitions

  • the present invention relates to a hybrid compressor preferably used in a vehicle air-conditioning system.
  • Japanese Unexamined Patent Publication No. 11-93876 discloses a hybrid compressor that includes a housing, a compression mechanism, a drive mechanism and a transmission mechanism.
  • the compression mechanism and the drive mechanism are provided in the housing, and the transmission mechanism is provided outside the housing.
  • the compression mechanism sucks refrigerant gas, compresses it and discharges it.
  • the drive mechanism includes an electric motor that rotates a rotary shaft through a speed-changing mechanism for driving the compression mechanism.
  • the transmission mechanism transmits power to the drive shaft from an external drive source such as an engine that is located outside the housing.
  • This reference discloses scroll type and vane type compression mechanisms, an induction motor as the electric motor of the drive mechanism and an electromagnetic clutch as the transmission mechanism.
  • the hybrid compressor when the external drive source is in an operational state, the power is transmitted from the external drive source to the rotary shaft through the transmission mechanism to drive the compression mechanism.
  • the drive mechanism rotates the rotary shaft through the speed-changing mechanism that reduces the rotational speed of the rotary shaft to drive the compression mechanism.
  • the refrigerant gas and the lubricating oil sent from the compression mechanism respectively cool and lubricate the electric motor and the speed-changing mechanism.
  • the lubricating oil sent only from the compression mechanism is insufficient for lubricating the speed-changing mechanism.
  • the function of the speed-changing mechanism deteriorates after a long period of time, and the efficiency and the life of the hybrid compressor also deteriorate.
  • the present invention provides a hybrid compressor that maintains its efficiency and its life even though the hybrid compressor is used for a long period of time.
  • a hybrid compressor includes a housing, a rotary shaft, a compression mechanism and a drive mechanism.
  • the rotary shaft is rotatably supported by the housing.
  • the compression mechanism is located in the housing and connected to the rotary shaft for compressing refrigerant gas.
  • the drive mechanism is located in the housing for driving the compression mechanism.
  • a speed-changing mechanism is located in the housing for transmitting power from the drive mechanism to the compression mechanism via the rotary shaft. The speed-changing mechanism varies the rotational speed of the drive mechanism.
  • a sealing mechanism is located in the housing for sealing a space partially defined by the speed-changing mechanism.
  • a housing of a hybrid compressor includes a front housing 1, a center housing 2, a fixed scroll member 11 and a rear housing 3.
  • the front housing 1 is fixed to the center housing 2.
  • the hybrid compressor includes a compression mechanism 10, a drive mechanism 80, a speed-reducing mechanism 40 and an electromagnetic clutch 50.
  • the compression mechanism 10 is located in the center housing 2, the fixed scroll member 11 and the rear housing 3.
  • the drive mechanism 80 and the speed-reducing mechanism 40 are located in the front housing 1.
  • the electromagnetic clutch 50 as a transmission mechanism is located outside the front housing 1.
  • a first housing includes the center housing 2, the fixed scroll member 11 and the rear housing 3.
  • the fixed scroll member 11 and the rear housing 3 correspond to a first housing main body, and the center housing 2 corresponds to a partition wall.
  • the front housing 1 corresponds to a second housing.
  • the compression mechanism 10 includes the fixed scroll member 11 and a movable scroll member 12 that are engaged with each other to define compression chambers 13.
  • the fixed scroll member 11 includes a fixed base plate 11a, a shell portion 11b and a fixed spiral wall 11c.
  • the shell portion 11b is fixed to the center housing 2 and the rear housing 3 and is sandwiched between the center housing 2 and the rear housing 3.
  • the shell portion 11b constitutes the outer periphery of the fixed scroll member 11.
  • the fixed base plate 11a has a disc shape and is formed integrally with the shell portion 11b at the side of the rear housing 3.
  • the fixed spiral wall 11c protrudes from the fixed base plate 11a toward the center housing 2 in an involute curve.
  • the movable scroll member 12 includes a movable base plate 12a, a movable spiral wall 12b and a boss 12c.
  • the movable base plate 12a has a disc shape.
  • the movable spiral wall 12b protrudes from the movable base plate 12a toward the rear housing 3 in an involute curve.
  • the compression chambers 13 are defined by the fixed base plate 11a, the fixed spiral wall 11c, the movable base plate 12a and the movable spiral wall 12b.
  • the boss 12c is formed on the movable base plate 12a in the center housing 2.
  • a suction chamber 3b and a discharge chamber 3a are defined by the fixed scroll member 11 and the rear housing 3.
  • a suction port extends through the outer periphery of the fixed base plate 11a to interconnect the suction chamber 3b and the compression chambers 13.
  • the suction chamber 3b is also connected to an evaporator of a refrigeration circuit that is not shown.
  • a discharge port 14 extends through the center of the fixed base plate 11a to interconnect the compression chambers 13 and the discharge chamber 3a.
  • the discharge chamber 3a is connected to a condenser of the refrigeration circuit that is not shown.
  • a shaft hole 2a is formed in the center housing 2.
  • a rotary shaft 4 is inserted through the shaft hole 2a.
  • a shaft seal device 21 is arranged between the rotary shaft 4 and the shaft hole 2a.
  • the center housing 2 is hermetically fixed to the front housing 1.
  • the rotary shaft 4 is rotatably supported by the center housing 2 via the shaft seal device 21 and a radial bearing 22.
  • a slide key 23 is protruded from the inner end of a large diameter portion 4a of the rotary shaft 4 and is offset from a central axis S of the rotary shaft 4.
  • a counter weight 24 is fitted to a drive bush 25 that is inserted to the slide key 23.
  • the boss 12c of the movable scroll member 12 is supported by the drive bush 25 via a radial bearing 26.
  • a self-rotation preventing mechanism 27 is provided between the center housing 2 and the movable base plate 12a for preventing the movable base plate 12a from self-rotating.
  • the drive mechanism 80 includes a direct current motor (a DC motor) 81 for rotationally driving the rotary shaft 4 and a printed circuit board 87 that has integrated circuits (IC) for controlling the DC motor 81.
  • the DC motor 81 includes a casing 82, a pair of permanent magnets 83, a rotor 84 and a brush 85.
  • the casing 82 has a cylindrical shape.
  • the outer circumferential surface of the casing 82 is fixed to the front housing 1.
  • the pair of the permanent magnets 83 are fixed to the inner circumferential surface of the casing 82 and face each other.
  • the rotor 84 has a cylindrical shape and is rotatably provided inside the casing 82.
  • a plurality of salient poles has winding wire and is mounted on the outer circumferential surface of the rotor 84.
  • the salient poles are arranged around the central axis S.
  • the brush 85 electrically contacts the rotor 84 through a sun gear 42 for switching the direction of electric current applied to the winding wire.
  • the brush 85 is electrically connected to the printed circuit board 87 via a connector 86.
  • the printed circuit board 87 is connected via a cable 88 to a computer that is not shown.
  • the speed-reducing mechanism 40 for reducing the rotational speed of the rotary shaft 4 relative to the rotational speed of the drive mechanism 80 transmits driving power from the drive mechanism 80 to the compression mechanism 10.
  • the speed-reducing mechanism 40 includes a planetary gear mechanism that has the sun gear 42, three planetary gears 43 and an internal gear 44.
  • a part 42a of the sun gear 42 is fitted into the rotor 84 of the DC motor 81 to rotate integrally.
  • External gear teeth are formed on the outer circumferential surface of a part 42b of the sun gear 42.
  • a shield bearing 41 is arranged between the sun gear 42 and the center housing 2.
  • the sun gear 42 and the rotor 84 are rotatably supported by the center housing 2 via the shield bearing 41.
  • Internal gear teeth are formed on the inner circumferential surface of the internal gear 44.
  • the internal gear 44 is fixed to the front housing 1 and rotatably supports the sun gear 42 via a shield bearing 48.
  • the three planetary gears 43 are rotatably provided between the sun gear 42 and the internal gear 44.
  • External gear teeth are formed on the outer circumferential surface of each of the planetary gears 43 and are engaged with the external gear teeth of the sun gear 42 as well as the internal gear teeth of the internal gear 44.
  • Each of the planetary gears 43 is connected to an arm 43a.
  • the arm 43a is rotatably supported by the front housing 1 via a shield bearing 49, and the rotary shaft 4 is supported by the front housing 1 via a shaft seal device 46 and a shield bearing 45.
  • the speed-reducing mechanism 40 is sealed by the shaft seal devices 21 and 46, the shield bearings 41, 48, 49 and 45.
  • a space A is substantially defined by the sun gear 42, the rotary shaft 4 and the center housing 2 and is sealed by the shield bearing 41 and the shaft seal device 21.
  • a space B is substantially defined by the sun gear 42, the planetary gears 43 and the internal gear 44 and is sealed by the shield bearing 48.
  • a space C is substantially defined by the planetary gears 43, the arm 43a, the rotary shaft 4 and the front housing 1 and is sealed by the shield bearings 49 and 45 and the shaft seal device 46.
  • the spaces A, B and C communicate with each other and constitute the internal space of the speed-reducing mechanism 40.
  • Lubricating oil L is stored inside the spaces A, B and C of the speed-reducing mechanism 40 and does not leak to the outside due to the above sealing mechanism.
  • the shaft seal devices 21 and 46, the shield bearings 41, 48, 49 and 45 correspond to a sealing mechanism.
  • a one-way clutch 47 is arranged between the arm 43a of the speed-reducing mechanism 40 and the rotary shaft 4.
  • the one-way clutch 47 is the same type of the one-way clutch as disclosed in Japan Unexamined Patent Publication No. 2002-276775.
  • the one-way clutch 47 transmits power from the speed-reducing mechanism 40 to the rotary shaft 4 and blocks power from the rotary shaft 4 to the speed-reducing mechanism 40.
  • the electromagnetic clutch 50 is provided outside the front housing 1.
  • the electromagnetic clutch 50 includes a hub 53, a pulley 51 and a coil 52.
  • the hub 53 has an armature and is fixed to the outer end of the rotary shaft 4.
  • the pulley 51 is rotatably provided at the front housing 1 via a bearing device 54.
  • the pulley 51 is wound to a belt that is not shown, and the belt is connected to an engine 60 as an external drive source.
  • the coil 52 is fixed to the front housing 1 in the pulley 51. When an electric current is applied to the coil 52, the armature of the hub 53 moves and is magnetically connected to the pulley 51, and the rotary shaft 4 is rotated synchronously with the pulley 51. Thus, driving power is transmitted from the engine 60 to the rotary shaft 4.
  • the drive mechanism 80 drives the compression mechanism 10. Namely, when the electric current is not applied to the coil 52 of the electromagnetic clutch 50, the pulley 51 and the hub 53 is separated from each other. Thus, the pulley 51 idles, and the driving power is not transmitted from the engine 60 to the rotary shaft 4.
  • the rotor 84 rotates. Since the part 42a of the sun gear 42 of the planetary gear mechanism is fitted into the rotor 84, the sun gear 42 rotates integrally with the rotor 84. In accordance with the rotation of the sun gear 42, the arm 43a is rotated via the planetary gears 43.
  • the rotational speed of the arm 43a is reduced due to the gear ratio among the sun gear 42, the planetary gears 43 and the internal gear 44. Then, the rotary shaft 4 rotates via the one-way clutch 47 at the same rotational speed of the arm 43a. Therefore, the rotation of the rotor 84 is transmitted to the drive shaft 4 via the speed-reducing mechanism 40 that reduces the rotational speed of the rotor 84.
  • the engine 60 drives the compression mechanism 10 via the electromagnetic clutch 50.
  • the rotor 84 does not rotate, and the driving power is not transmitted from the drive mechanism 80 to the rotary shaft 4 via the speed-reducing mechanism 40.
  • the electric current is applied to the coil 52 of the electromagnetic clutch 50, the pulley 51 is magnetically connected to the hub 53, and the driving power is transmitted from the engine 60 to the rotary shaft 4 via the electromagnetic clutch 50.
  • the compression mechanism 10 is driven as described above. In this way, the engine 60 drives the compression mechanism 10 via the electromagnetic clutch 50. Furthermore, when the electric current is not applied to DC motor 81 and the electromagnetic clutch 50, the drive of the compression mechanism 10 is stopped.
  • the speed-reducing mechanism 40 that transmits the power from the drive mechanism 80 to the compression mechanism 10 is sealed by the shaft seal devices 21 and 46, the shield bearings 41, 48, 49 and 45 from the drive mechanism 80 and the compression mechanism 10.
  • the lubricating oil L is utilized only for the speed-reducing mechanism 40 and sufficiently lubricates the speed-reducing mechanism 40.
  • the lubricating oil L in the speed-reducing mechanism 40 is substantially prevented from leaking to the outside of the speed-reducing mechanism 40 due to the above sealing.
  • the compression mechanism 10, the drive mechanism 80 and the electromagnetic clutch 50 are protected from the lubricating oil L.
  • the drive mechanism 80 and the electromagnetic clutch 50 perform a long life in comparison to the prior art components due to the block of the damage caused by the lubricating oil. For the above reason, even though the hybrid compressor in the first preferred embodiment is used for a long period, the efficiency of the hybrid compressor is hard to deteriorate.
  • the shaft seal device 21 is arranged between the rotary shaft 4 and the shaft hole 2a so that the center housing 2 is hermetically fixed to the front housing 1.
  • the drive mechanism 80 is separated from the compression mechanism 10, and the refrigerant gas and lubricating oil in the compression mechanism 10 is prevented from invading the drive mechanism 80. Therefore, the DC motor 81 is utilized as the motor of the drive mechanism 80.
  • the speed-reducing mechanism 40 for reducing the speed of the rotary shaft 4 transmits the power from the drive mechanism 80 to the compression mechanism 10 in the hybrid compressor, the rotational torque of the DC motor 81 can be small.
  • the DC motor 81 is miniaturized, and the hybrid compressor is miniaturized due to the miniaturized DC motor 81.
  • the one-way clutch 47 is arranged between the speed-reducing mechanism 40 and the rotary shaft 4 in the hybrid compressor.
  • the one-way clutch 47 transmits the driving power from the DC motor 81 to the rotary shaft 4 via the speed-reducing mechanism 40 and blocks the power that is applied to the compression mechanism 10 from the rotary shaft 4 to the speed-reducing mechanism 40.
  • the speed-reducing mechanism 40 and the drive mechanism 80 are not load for the compression mechanism 10, the compression mechanism 10 is prevented from being locked.
  • the compression mechanism 10 is located in the first housing including the center housing 2, the fixed scroll member 11 and the rear housing 3.
  • the speed-reducing mechanism 40 and the drive mechanism 80 are located in the second housing or the front housing 1.
  • the second housing is fixed to the first housing.
  • the second housing is only modified and the first housing is shared as a common portion, the structure and the combination of the drive mechanism 80 and the speed-reducing mechanism 40 are modified variously.
  • the speed-reducing mechanism 40 and the one-way clutch 47 are alternatively removed from the hybrid compressor, and the rotor 84 of the drive mechanism 80 is directly connected to the rotary shaft 4.
  • the driving power is transmitted from the engine 60 to the rotary shaft 4 via the electromagnetic clutch 50.
  • the rotor 84 of the drive mechanism 80 is rotated in the permanent magnets 83.
  • the drive mechanism 80 generates electric power and function as a power generation mechanism.
  • the compression mechanism 10 does not substantially introduce, compress and discharge the refrigerant gas while the compression mechanism 10 is driven, all of the torque of the rotary shaft 4 is substantially utilized for generating the electric power.
  • a pulley can be utilized to connect the engine 60 to the rotary shaft 4 instead of the electromagnetic clutch 50.
  • a hosing of a hybrid compressor housing includes a front housing 1, a center housing 2, a fixed scroll member 11 and a rear housing 3.
  • the front housing 1 is fixed to the center housing 2.
  • the hybrid compressor also includes a compression mechanism 10, a drive mechanism 70, a speed-reducing mechanism 40 and an electromagnetic clutch 50.
  • the compression mechanism 10 is located in the center housing 2, the fixed scroll member 11 and the rear housing 3.
  • the drive mechanism 70 and the speed-reducing mechanism 40 are located in the front housing 1.
  • the electromagnetic clutch 50 is located outside the front housing 1.
  • a first housing includes the center housing 2, the fixed scroll member 11 and the rear housing 3.
  • the fixed scroll member 11 and the rear housing 3 correspond to a first housing main body, and the center housing 2 corresponds to a partition wall.
  • the front housing 1 corresponds to a second housing.
  • the compression mechanism 10 includes the fixed scroll member 11 and a movable scroll member 12 that are engaged with each other to define compression chambers 13.
  • the fixed scroll member 11 includes a fixed base plate 11a, a shell portion 11b and a fixed spiral wall 11c.
  • the shell portion 11b is fixed to the center housing 2 and the rear housing 3 and is sandwiched between the center housing 2 and the rear housing 3.
  • the shell portion 11b constitutes the outer periphery of the fixed scroll member 11.
  • the fixed base plate 11a has a disc shape and is formed integrally with the shell portion 11 b at the side of the rear housing 3.
  • the fixed spiral wall 11c protrudes from the fixed base plate 11a toward the center housing 2 in an involute curve.
  • the movable scroll member 12 includes a movable base plate 12a, a movable spiral wall 12b and a boss 12c.
  • the movable base plate 12a has a disc shape.
  • the movable spiral wall 12b protrudes from the movable base plate 12a toward the rear housing 3 in an involute curve.
  • the compression chambers 13 are defined by the fixed base plate 11a, the fixed spiral wall 11c, the movable base plate 12a and the movable spiral wall 12b.
  • the boss 12c is formed on the movable base plate 12a in the center housing 2.
  • a suction chamber 3b and a discharge chamber 3a are defined by the fixed scroll member 11 and the rear housing 3.
  • a suction port extends through the outer periphery of the fixed base plate 11a to interconnect the suction chamber 3b and the compression chambers 13.
  • the suction chamber 3b is connected to an evaporator of a refrigeration circuit that is not shown.
  • a discharge port 14 extends through the center of the fixed base plate 11a and interconnects the compression chambers 13 and the discharge chamber 3a.
  • the discharge chamber 3a is connected to a condenser of the refrigeration circuit that is not shown.
  • a rotary shaft 4 is rotatably supported in the center housing 2 via a radial bearing 22.
  • a slide key 23 is protruded from the inner end of a large diameter portion 4a of the rotary shaft 4 and is offset from a central axis S of the rotary shaft 4.
  • a counter weight 24 is fitted to a drive bush 25 that is inserted to the slide key 23.
  • the boss 12c of the movable scroll member 12 is supported by the drive bush 25 via a radial bearing 26.
  • a self-rotation preventing mechanism 27 is provided between the center housing 2 and the movable base plate 12a for preventing the movable base plate 12a from self rotating.
  • the drive mechanism 70 includes an induction motor 71 for rotationally driving the rotary shaft 4 and a printed circuit board 77 that has integrated circuits (IC) for controlling the induction motor 71.
  • the induction motor 71 includes a yoke 72, a plurality of coils 73 and a rotor 74.
  • the yoke 72 has a cylindrical shape, and the outer circumferential surface of the yoke 72 is fixed to the front housing 1.
  • a plurality of the coils 73 is provided on the inner circumferential surface of the yoke 72.
  • the rotor 74 has a cylindrical shape and is rotatably provided inside the yoke 72.
  • the coils 73 are electrically connected to the printed circuit board 77 via a wiring and a connector 76.
  • the wiring is partially shown in FIG. 2.
  • the printed circuit board 77 is connected via a cable 78 to a computer that is not shown.
  • the speed-reducing mechanism 40 is provided between the drive mechanism 70 and the compression mechanism 10.
  • the speed-reducing mechanism 40 includes a planetary gear mechanism that has a sun gear 42, three planetary gears 43 and an internal gear 44.
  • An O-ring 44a is provided on the outer circumferential surface of the internal gear 44.
  • a part 42a of the sun gear 42 is fitted into the rotor 74 of the induction motor 71 to rotate integrally.
  • External gear teeth are formed on the outer circumferential surface of a part 42b of the sun gear 42.
  • the rotary shaft 4 is rotatably supported by the sun gear 42 via a shaft seal device 46c and a shield bearing 41.
  • Internal gear teeth are formed on the inner circumferential surface of the internal gear 44.
  • the internal gear 44 is fixed to the yoke 72 of the induction motor 71.
  • the sun gear 42 is rotatably supported by the internal gear 44 via a shield bearing 48 and by the yoke 72 via a shaft seal device 46b.
  • the three planetary gears 43 are rotatably provided between the sun gear 42 and the internal gear 44.
  • External gear teeth are formed on the outer circumferential surface of each of the planetary gears 43 and are engaged with the external gear teeth of the sun gear 42 as well as the internal gear teeth of the internal gear 44.
  • Each of the planetary gears 43 is connected to an arm 43a.
  • the arm 43a is rotatably supported by the front housing 1 via a shield bearing 49, and the rotary shaft 4 is supported by the front housing 1 via a shaft seal device 46a and a shield bearing 45.
  • the speed-reducing mechanism 40 is sealed by the shaft seal devices 46a, 46b and 46c, the shield bearings 41, 48, 49 and 45 and the O-ring 44a.
  • a space A is substantially defined by the sun gear 42 and the rotary shaft 4 and is sealed by the shield bearing 41 and the shaft seal device 46c.
  • a space B is substantially defined by the sun gear 42, the planetary gears 43 and the internal gear 44 and is sealed by the shield bearing 48 and the shaft seal device 46b.
  • a space C is substantially defined by the planetary gears 43, the arm 43a, the rotary shaft 4 and the front housing 1 and is sealed by the shield bearings 49, 45 and the shaft seal device 46a.
  • the spaces A, B and C communicate with each other and constitute the internal space of the speed-reducing mechanism 40.
  • Lubricating oil L is stored inside the space A, B and C of the speed-reducing mechanism 40 and does not leak to the outside due to the above sealing mechanism.
  • the shaft seal devices 46a, 46b and 46c, the shield bearings 41, 48, 49 and 45 and the O-ring 44a correspond to a sealing mechanism.
  • a one-way clutch 47 is arranged between the arm 43a of the speed-reducing mechanism 40 and the rotary shaft 4.
  • the one-way clutch 47 is the same type of the one-way clutch as disclosed in Japan Unexamined Patent Publication No. 2002-276775.
  • the one-way clutch 47 transmits power from the speed-reducing mechanism 40 to the rotary shaft 4 and blocks power from the rotary shaft 4 to the speed-reducing mechanism 40.
  • the electromagnetic clutch 50 is provided outside the front housing 1.
  • the electromagnetic clutch 50 includes a hub 53, a pulley 51 and a coil 52.
  • the hub 53 has an armature and is fixed to the outer end of the rotary shaft 4.
  • the pulley 51 is rotatably provided at the front housing 1 via a bearing device 54.
  • the pulley 51 is wound to a belt that is not shown, and the belt is connected to an engine 60 as an external drive source.
  • the coil 52 is fixed to the front housing 1 in the pulley 51. When electric current is applied to the coil 52, the armature of the hub 53 moves and is magnetically connected to the pulley 51, and the rotary shaft 4 is rotated synchronously with the pulley 51.
  • driving power is transmitted from the engine 60 to the rotary shaft 4.
  • the drive mechanism 70 when electric current is not applied to the electromagnetic clutch 51 but is applied to the induction motor 71, the drive mechanism 70 similarly drives the compression mechanism 10 as described in the first preferred embodiment.
  • the electric current when the electric current is not applied to the induction motor 71 but is applied to the coil 52 of the electromagnetic clutch 50, the engine 60 drives the compression mechanism 10 via the electromagnetic clutch 50. Furthermore, when the electric current is not applied to the induction motor 71 and the electromagnetic clutch 50, the drive of the compression mechanism 10 is stopped.
  • the speed-reducing mechanism 40 that the speed-reducing mechanism 40 that transmits the power from the drive mechanism 70 to the compression mechanism 10 is sealed by the shaft seal devices 46a, 46b and 46c, the shield bearings 41, 48, 49 and 45 and the O-ring 44a from the drive mechanism 70 and the compression mechanism 10.
  • the lubricating oil L is utilized only for the speed-reducing mechanism 40 and sufficiently lubricates the speed-reducing mechanism 40.
  • the lubricating oil L in the speed-reducing mechanism 40 is prevented from leaking to the outside of the speed-reducing mechanism 40.
  • the compression mechanism 10, the drive mechanism 70 and the electromagnetic clutch 50 are protected from the lubricating oil L.
  • the drive mechanism 70 and the electromagnetic clutch 50 are performed a long life in comparison to the prior art components due to the block of the damage caused by the lubricating oil. For the above reason, even though the hybrid compressor in the second preferred embodiment is used for a long period, the efficiency of the hybrid compressor is hard to deteriorate.
  • the drive mechanism 70 communicates with the compression mechanism 10.
  • the induction motor 71 is cooled and lubricated by the refrigerant gas and lubricating oil that are sent from the compression mechanism 10.
  • the speed-reducing mechanism 40 for reducing the speed of the rotary shaft 4 transmits the power from the drive mechanism 70 to the compression mechanism 10 in the hybrid compressor, the rotational torque of the induction motor 71 can be small.
  • the induction motor 71 is miniaturized, and the hybrid compressor is miniaturized due to the miniaturized induction motor 71.
  • the one-way clutch 47 is arranged between the speed-reducing mechanism 40 and the rotary shaft 4 in the hybrid compressor.
  • the one-way clutch 47 transmits the driving power from the induction motor 71 to the rotary shaft 4 via the speed-reducing mechanism 40 and blocks the driving power that is applied to the compression mechanism 10 from the rotary shaft 4 to the speed-reducing mechanism 40.
  • the speed-reducing mechanism 40 and the drive mechanism 70 are not load for the compression mechanism 10, the compression mechanism 10 is prevented from being locked.
  • the compression mechanism 10 is a scroll type.
  • a vane type and a swash plate type are utilized as the compression mechanism.
  • a hybrid compressor includes a housing, a rotary shaft, a compression mechanism and a drive mechanism.
  • the rotary shaft is rotatably supported by the housing.
  • the compression mechanism is located in the housing and connected to the rotary shaft for compressing refrigerant gas.
  • the drive mechanism is located in the housing for driving the compression mechanism.
  • a speed-changing mechanism is located in the housing for transmitting power from the drive mechanism to the compression mechanism via the rotary shaft. The speed-changing mechanism varies the rotational speed of the drive mechanism.
  • a sealing mechanism is located in the housing for sealing a space partially defined by the speed-changing mechanism.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Retarders (AREA)
  • Compressor (AREA)
EP04007456A 2003-03-31 2004-03-26 Hybrid compressor Withdrawn EP1464839A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003096121 2003-03-31
JP2003096121A JP2004301054A (ja) 2003-03-31 2003-03-31 ハイブリッドコンプレッサ

Publications (1)

Publication Number Publication Date
EP1464839A1 true EP1464839A1 (en) 2004-10-06

Family

ID=32844640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04007456A Withdrawn EP1464839A1 (en) 2003-03-31 2004-03-26 Hybrid compressor

Country Status (3)

Country Link
US (1) US20040202550A1 (ja)
EP (1) EP1464839A1 (ja)
JP (1) JP2004301054A (ja)

Cited By (4)

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CN102536813A (zh) * 2011-11-05 2012-07-04 佛山市广顺电器有限公司 一种汽车空调涡旋压缩机
CN102734157A (zh) * 2011-03-30 2012-10-17 株式会社京浜 压缩机
CN104329255A (zh) * 2013-07-22 2015-02-04 卡森尼可关精株式会社 气体压缩机
EP2072754A3 (en) * 2007-12-18 2015-05-06 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor with multi-part casing

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US6742350B2 (en) * 2001-11-03 2004-06-01 Nippon Soken, Inc. Hybrid compressor device
JP4173345B2 (ja) * 2002-10-03 2008-10-29 本田技研工業株式会社 車両の駆動装置
US7841845B2 (en) 2005-05-16 2010-11-30 Emerson Climate Technologies, Inc. Open drive scroll machine
EP2392827B1 (en) * 2009-01-30 2017-05-10 Panasonic Intellectual Property Management Co., Ltd. Scroll compressor
DE102010015151A1 (de) * 2010-04-16 2011-10-20 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Verdichterflansch für Schraubenverdichter
JP5482706B2 (ja) * 2011-03-28 2014-05-07 株式会社豊田自動織機 変速機付き圧縮機
JP2014015901A (ja) * 2012-07-10 2014-01-30 Toyota Industries Corp スクロール式膨張機
CN102996454A (zh) * 2012-12-24 2013-03-27 乔建设 单级盘双动涡旋压缩机
CN103047141A (zh) * 2012-12-26 2013-04-17 皮德智 一种机电双驱动单动盘涡旋压缩机
JP7345131B2 (ja) * 2019-08-05 2023-09-15 パナソニックＩｐマネジメント株式会社 圧縮機
CN110469507A (zh) * 2019-09-19 2019-11-19 广东兴泽尔新能源科技有限公司 驱动机构及涡旋压缩机
CN111734629A (zh) * 2020-08-11 2020-10-02 山东永申机电科技有限公司 带电双驱汽车空调压缩机减速离合机构与电机传动装置

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2072754A3 (en) * 2007-12-18 2015-05-06 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor with multi-part casing
CN102734157A (zh) * 2011-03-30 2012-10-17 株式会社京浜 压缩机
CN102536813A (zh) * 2011-11-05 2012-07-04 佛山市广顺电器有限公司 一种汽车空调涡旋压缩机
CN102536813B (zh) * 2011-11-05 2015-11-25 佛山市广顺电器有限公司 一种汽车空调涡旋压缩机
CN104329255A (zh) * 2013-07-22 2015-02-04 卡森尼可关精株式会社 气体压缩机

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