EP4130478B1 - Rotationsverdichter - Google Patents

Rotationsverdichter Download PDF

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Publication number
EP4130478B1
EP4130478B1 EP21781413.6A EP21781413A EP4130478B1 EP 4130478 B1 EP4130478 B1 EP 4130478B1 EP 21781413 A EP21781413 A EP 21781413A EP 4130478 B1 EP4130478 B1 EP 4130478B1
Authority
EP
European Patent Office
Prior art keywords
axis
shaft
pair
stator
rotary 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.)
Active
Application number
EP21781413.6A
Other languages
English (en)
French (fr)
Other versions
EP4130478A4 (de
EP4130478C0 (de
EP4130478A1 (de
Inventor
Yoshiyuki Okada
Takuma YAMASHITA
Risako KOBA
Mikito SASAKI
Masahiro Nii
Makoto Ogawa
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.)
Mitsubishi Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Thermal Systems 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 Mitsubishi Heavy Industries Thermal Systems Ltd filed Critical Mitsubishi Heavy Industries Thermal Systems Ltd
Publication of EP4130478A1 publication Critical patent/EP4130478A1/de
Publication of EP4130478A4 publication Critical patent/EP4130478A4/de
Application granted granted Critical
Publication of EP4130478B1 publication Critical patent/EP4130478B1/de
Publication of EP4130478C0 publication Critical patent/EP4130478C0/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F04C18/356—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 with vanes reciprocating with respect to the outer member
    • F04C18/3562—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 with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/02—Arrangements of bearings
    • 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
    • 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
    • F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/52—Bearings for assemblies with supports on both sides
    • 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
    • F04C2240/50—Bearings
    • F04C2240/56—Bearing bushings or details thereof

Definitions

  • the present disclosure relates to a rotary compressor.
  • a rotary compressor is known as a device used for compressing a refrigerant in an air conditioner.
  • the rotary compressor includes a motor, a shaft driven by the motor, a rotary piston attached to the shaft, and a cylinder covering the rotary piston.
  • the refrigerant is compressed by an eccentric rotation of the rotary piston in the compression chamber of the cylinder.
  • An axial gap motor described in PTL 1 has one stator and two rotors facing the stator from both sides in an axial direction.
  • the rotary piston and the cylinder described above are independently disposed below the axial gap motor.
  • the present disclosure has been made in order to solve the above problems, and an object of the present disclosure is to provide a rotary compressor having a reduced number of parts and a smaller size.
  • a rotary compressor as defined by the accompanying claims, including: a shaft that extends along an axis; a disk-shaped rotor that is fixed to the shaft and centered on the axis; a pair of stators that faces the rotor from both sides in a direction of the axis, and includes disk-shaped back yokes centered on the axis, teeth protruding from the back yoke, and a coil wound around the teeth; a pair of cylinders that abuts on the stator from the direction of the axis and has an annular shape centered on the axis; rotary pistons that rotate eccentrically with the shaft; a pair of end plates that forms each a compression chamber for accommodating a rotary piston together with a back yoke by sandwiching the cylinder together with a stator from the direction of the axis; and a pair of bearings that is provided on at least one of the end plate and
  • the rotary compressor 100 includes a shaft 1, a rotor 2, a stator 3, a cylinder 4, an end plate 5, a bearing 6, a rotary piston 12, and a housing 7 for accommodating these.
  • the shaft 1 has a shaft main body 1H, an upper eccentric shaft 11A, and a lower eccentric shaft 11B.
  • the shaft main body 1H has a columnar shape extending along an axis Ac.
  • the upper eccentric shaft 11A and the lower eccentric shaft 11B are provided at an interval in a direction of the axis Ac.
  • Each of the upper eccentric shaft 11A and the lower eccentric shaft 11B has a disk shape eccentric in a radial direction with respect to the axis Ac.
  • Eccentric directions of the upper eccentric shaft 11A and the lower eccentric shaft 11B are different from each other. For example, the eccentric direction of the upper eccentric shaft 11A differs from the eccentric direction of the lower eccentric shaft 11B by 180°.
  • the rotor 2 is integrally provided at a position (central portion) in a middle of extension of the shaft main body 1H. That is, the rotor 2 is provided at an intermediate position between the upper eccentric shaft 11A and the lower eccentric shaft 11B.
  • the rotor 2 has a rotor core 21 and a permanent magnet 22.
  • the rotor core 21 has a disk shape centered on the axis Ac.
  • the permanent magnet 22 has a ring shape extending along a peripheral edge of the rotor core 21.
  • the stator 3 disposed so as to face the rotor 2 from both sides in the direction of the axis Ac includes an upper stator 3A and a lower stator 3B.
  • the upper stator 3A faces the rotor 2 from one side (upper side) in the direction of the axis Ac.
  • the upper stator 3A has a back yoke 31A, teeth 32A, and a coil 33A.
  • the back yoke 31A has an annular shape centered on the axis Ac. An opening through which the shaft 1 is inserted is formed in a portion including the center of the back yoke 31A.
  • the teeth 32A are positioned on a surface of the back yoke 31A facing the other side (lower side) in the direction of the axis Ac, and have a rod shape protruding in the direction of the axis Ac from the center position in the radial direction.
  • a plurality of teeth 32A are arranged at equal intervals in the circumferential direction with respect to the axis Ac.
  • the coil 33A is formed by winding a copper wire around each tooth 32A. Power is supplied to the coil 33A from a power source (not shown) .
  • the lower stator 3B has a back yoke 31B, teeth 32B, and a coil 33B.
  • the back yoke 31B has an annular shape centered on the axis Ac.
  • An opening through which the shaft 1 is inserted is formed in a portion including the center of the back yoke 31B.
  • the teeth 32B are positioned on a surface of the back yoke 31B facing one side (upper side) in the direction of the axis Ac, and have a rod shape protruding in the direction of the axis Ac from the center position in the radial direction.
  • a plurality of teeth 32B are arranged at equal intervals in the circumferential direction with respect to the axis Ac.
  • the coil 33B is formed by winding a copper wire around each tooth 32B. Power is supplied to the coil 33B from a power source (not shown). As a result, the upper stator 3A and the lower stator 3B are excited, and the shaft 1 is rotated by the electromagnetic force generated between the rotor 2 and the stator 3. That is, the rotor 2 and the stator 3 constitute a one rotor-two stator type axial gap motor.
  • the cylinder 4 (upper cylinder 4A and lower cylinder 4B) abuts on one side (upper side) of the upper stator 3A in the direction of the axis Ac and the other side (lower side) of the lower stator 3B in the direction of the axis Ac.
  • Each of the upper cylinder 4A and the lower cylinder 4B has a cylindrical shape centered on the axis Ac.
  • the above-mentioned upper eccentric shaft 11A and the ring-shaped rotary piston 12 (upper rotary piston 12A) fitted in the upper eccentric shaft 11A are accommodated inside the upper cylinder 4A.
  • the above-mentioned lower eccentric shaft 11B and the ring-shaped rotary piston 12 (lower rotary piston 12B) fitted in the lower eccentric shaft 11B are accommodated inside the lower cylinder 4B. Further, intake ports 8A and 8B for guiding the refrigerant from the outside are provided in a portion of the upper cylinder 4A and the lower cylinder 4B in the circumferential direction, respectively.
  • the end plates 5 (upper end plate 5A, lower end plate 5B) abut on one side (upper side) of the upper cylinder 4A in the direction of the axis Ac and the other side (lower side) of the lower cylinder 4B in the direction of the axis Ac, respectively. That is, the upper end plate 5A sandwiches the upper cylinder 4A together with the back yoke 31A from the direction of the axis Ac. Similarly, the lower end plate 5B sandwiches the lower cylinder 4B together with the back yoke 31B from the direction of the axis Ac.
  • Each of the upper end plate 5A and the lower end plate 5B has a disk shape centered on the axis Ac.
  • the bearings 6 (upper bearing 6A, lower bearing 6B) are attached to a portion including the centers of the upper end plate 5A and the lower end plate 5B, respectively. A shaft end of the shaft main body 1H is supported by these bearings 6. Further, the upper end plate 5A and the lower end plate 5B are fixed to an inner peripheral surface of the housing 7 in a tightly fitted state.
  • a surface of the upper end plate 5A facing the other side (lower side) in the direction of the axis Ac is an end plate main surface 5S.
  • a surface of the back yoke 31A facing one side (upper side) of the direction of the axis Ac is a back yoke facing surface 31S.
  • An upper compression chamber C1 is formed by the end plate main surface 5S, the back yoke facing surface 31S, and the inner peripheral surface of the upper cylinder 4A. That is, in the present embodiment, a portion (back yoke 31A) of the stator 3 also serves as a member forming a portion of the upper compression chamber C1.
  • a lower compression chamber C2 is also formed by the back yoke 31B of the lower stator 3B, the lower end plate 5B, and the lower cylinder 4B, similarly to the upper compression chamber C1.
  • the above-mentioned upper rotary piston 12A and lower rotary piston 12B rotate eccentrically, respectively.
  • volumes of the upper compression chamber C1 and the lower compression chamber C2 change with time, and the refrigerant taken in from the intake ports 8A and 8B is compressed.
  • the compressed refrigerant passes through the inside of the housing 7 and is taken out from a discharge port 7A.
  • the back yokes 31A and 31B of the stator 3 form the compression chambers C1 and C2 together with the end plate 5 and the cylinder 4.
  • the back yokes 31A and 31B have both a function as a portion of the motor and a function as a portion of the members forming the compression chambers C1 and C2.
  • the number of parts can be reduced.
  • the size of the device in the direction of the axis Ac can be suppressed by the reduced members.
  • the shaft 1 can be supported by both end portions thereof. As a result, noise and vibration are reduced, and the shaft 1 can be rotated more stably.
  • a bearing 6' (upper bearing 6A') is integrally provided in a back yoke 31A instead of an end plate 5' (upper end plate 5A').
  • the end plate 5' has a disk shape centered on an axis Ac, and no opening or the like is formed in the portion including the center.
  • another bearing 6' located at the lower portion is also integrally provided on a back yoke 31B like the upper bearing 6A'.
  • the back yoke 31A can be configured to include an annular back yoke main body 34 integrally formed with the teeth 32A and a support plate 35 separately provided from the back yoke main body 34.
  • the support plate 35 has a disk shape centered on the axis Ac, and a bearing 6' is provided at the center of the support plate 35.
  • the configuration described in the first embodiment (the configuration in which the bearing 6 is provided in the end plate 5) and the configuration described in the second embodiment (the configuration in which the bearing 6' is provided in the back yokes 31A and 31B) can be combined. That is, it is possible to adopt a configuration in which the upper bearing 6A is attached to the end plate 5 and the lower bearing 6B is attached to the back yoke 31B, or a configuration in which the upper bearing 6A is attached to the back yoke 31A and the lower bearing 6B is attached to the end plate 5.
  • the rotary compressor 100 described in each embodiment is grasped as follows, for example.
  • the back yokes 31A and 31B of the stator 3 form the compression chambers C1 and C2 together with the end plate 5 and the cylinder 4.
  • the back yokes 31A and 31B have both a function as a portion of the motor and a function as a portion of the members forming the compression chambers C1 and C2.
  • the number of parts can be reduced.
  • the size of the device in the direction of the axis Ac can be suppressed by the reduced members.
  • the bearing 6 may be integrally provided in each of the pair of end plates 5.
  • the shaft 1 can be supported by both end portions thereof. As a result, noise and vibration are reduced, and the shaft 1 can be rotated more stably.
  • the bearing 6 may be integrally provided in each of the pair of back yokes 31A and 31B.
  • the bearing 6 is provided in each of the pair of back yokes 31A and 31B, the end portion of the shaft 1 does not protrude from the end plate 5 side. That is, the dimension of the shaft 1 can be kept small. This makes it possible to reduce the possibility that the shaft 1 is bent or misaligned.
  • the bearing 6 may protrude from the back yokes 31A and 31B in a direction toward the rotor 2.
  • the present disclosure relates to a rotary compressor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Claims (4)

  1. Rotationsverdichter, umfassend:
    eine Welle (1), die sich entlang einer Achse (Ac) erstreckt;
    einen scheibenförmigen Rotor (2), der an der Welle (1) befestigt und auf der Achse (Ac) zentriert ist;
    ein Paar von Statoren (3, 3A, 3B), das dem Rotor (2) von beiden Seiten in einer Richtung der Achse (Ac) zugewandt ist und jeweils ein scheibenförmiges hinteres Joch (31A, 31B), das auf der Achse (Ac) zentriert ist, Zähne (32A, 32B), die von dem hinteren Joch (31A, 31B) vorstehen, und eine Spule (33A, 33B), die um die Zähne (32A, 32B) gewickelt ist, einschließt;
    ein Paar von Zylindern (4), das aus der Richtung der Achse (Ac) auf den Stator (3, 3A, 3B) angrenzt und eine ringförmige Form aufweist, die auf der Achse (Ac) zentriert ist;
    Rotationskolben (12, 12A, 12B), die sich exzentrisch mit der Welle (1) drehen;
    ein Paar von Endplatten (5, 5A, 5B), die jeweilige Verdichtungskammern (C1, C2) zur Aufnahme der Rotationskolben (12, 12A, 12B) bilden;
    und ein Paar von Lagern (6, 6A, 6B), das auf mindestens einer der Endplatten (5, 5A, 5B) und dem hinteren Joch (31A, 31B) bereitgestellt ist, dadurch gekennzeichnet, dass jede Verdichtungskammer (C1, C2) durch eine der Endplatten (5, 5A, 5B) und eines der hinteren Joche (31A, 31B), das ein Abschnitt eines Stators (3, 3A, 3B) ist, gebildet ist, wobei jeder Zylinder (4, 4A, 4B) durch die Endplatte (5, 5A, 5B) und den Stator (3, 3A, 3B) aus der Richtung der Achse (Ac) sandwichartig eingeschlossen ist.
  2. Rotationsverdichter nach Anspruch 1, wobei das Lager (6, 6A, 6B) in jedem des Paars von Endplatten (5, 5A, 5B) integral bereitgestellt ist.
  3. Rotationsverdichter nach Anspruch 1 oder 2, wobei das Lager (6, 6A, 6B) in jedem des Paares von hinteren Jochen (31A, 31B) integral bereitgestellt ist.
  4. Rotationsverdichter nach Anspruch 3, wobei das Lager (6, 6A, 6B) von dem hinteren Joch (31A, 31B) in einer Richtung zu dem Rotor (2) hin vorsteht.
EP21781413.6A 2020-04-01 2021-04-01 Rotationsverdichter Active EP4130478B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020065992A JP7381386B2 (ja) 2020-04-01 2020-04-01 ロータリ圧縮機
PCT/JP2021/014156 WO2021201223A1 (ja) 2020-04-01 2021-04-01 ロータリ圧縮機

Publications (4)

Publication Number Publication Date
EP4130478A1 EP4130478A1 (de) 2023-02-08
EP4130478A4 EP4130478A4 (de) 2023-08-30
EP4130478B1 true EP4130478B1 (de) 2025-05-28
EP4130478C0 EP4130478C0 (de) 2025-05-28

Family

ID=77927326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21781413.6A Active EP4130478B1 (de) 2020-04-01 2021-04-01 Rotationsverdichter

Country Status (3)

Country Link
EP (1) EP4130478B1 (de)
JP (1) JP7381386B2 (de)
WO (1) WO2021201223A1 (de)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6469793A (en) * 1987-09-11 1989-03-15 Hitachi Ltd Enclosed type motor-driven compressor
US20060153705A1 (en) * 2004-11-10 2006-07-13 Horton W T Drive shaft for compressor
EP1850451A4 (de) * 2005-01-19 2014-01-22 Daikin Ind Ltd Rotor, motor des axialspalttyps, motorantriebsverfahren und kompressor
JP4816358B2 (ja) * 2006-09-19 2011-11-16 ダイキン工業株式会社 モータおよび圧縮機
JP4835384B2 (ja) 2006-10-26 2011-12-14 ダイキン工業株式会社 圧縮機
JP5963436B2 (ja) * 2011-12-21 2016-08-03 株式会社ヴァレオジャパン 電動圧縮機
JP6001356B2 (ja) * 2012-06-29 2016-10-05 株式会社ヴァレオジャパン 電動圧縮機
CN104638866A (zh) * 2013-11-15 2015-05-20 珠海格力节能环保制冷技术研究中心有限公司 电机及具有该电机的压缩机
CN104564685A (zh) * 2015-01-06 2015-04-29 广东美芝制冷设备有限公司 旋转式压缩机及具有其的制冷装置
JP2020065992A (ja) 2018-10-26 2020-04-30 臼井国際産業株式会社 気体溶解装置及び藻類培養装置

Also Published As

Publication number Publication date
WO2021201223A1 (ja) 2021-10-07
EP4130478A4 (de) 2023-08-30
JP7381386B2 (ja) 2023-11-15
EP4130478C0 (de) 2025-05-28
JP2021161989A (ja) 2021-10-11
EP4130478A1 (de) 2023-02-08

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