US20120301334A1 - Compressor and Refrigerating Cycle Apparatus - Google Patents

Compressor and Refrigerating Cycle Apparatus Download PDF

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Publication number
US20120301334A1
US20120301334A1 US13/479,438 US201213479438A US2012301334A1 US 20120301334 A1 US20120301334 A1 US 20120301334A1 US 201213479438 A US201213479438 A US 201213479438A US 2012301334 A1 US2012301334 A1 US 2012301334A1
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US
United States
Prior art keywords
compressor
coolant
refrigerating cycle
stator
compressor according
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.)
Abandoned
Application number
US13/479,438
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English (en)
Inventor
Baiying Huang
Hiroyasu Yoneyama
Kazuo Sakurai
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.)
Hitachi Appliances Inc
Original Assignee
Hitachi Appliances Inc
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 Hitachi Appliances Inc filed Critical Hitachi Appliances Inc
Assigned to HITACHI APPLIANCES, INC. reassignment HITACHI APPLIANCES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Huang, Baiying, SAKURAI, KAZUO, YONEYAMA, HIROYASU
Publication of US20120301334A1 publication Critical patent/US20120301334A1/en
Abandoned 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
    • 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
    • F04C23/001—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 of similar working principle
    • 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
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/045—Heating; Cooling; Heat insulation of the electric motor in hermetic pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving

Definitions

  • the present invention relates to an axial gap motor and a compressor using the same.
  • an axial gap motor and a compression mechanism section are disposed in one and the same closed container.
  • the abovementioned axial gap motor is disposed in low-pressure coolant suctioned in a refrigeration cycle. By the rotation of the rotor, the coolant is sent to a stator, and then flown into the compression mechanism section to be compressed.
  • This configuration has an advantage that a liquid droplet or an oil droplet contained in the coolant is separated, and liquid compression can be avoided effectively.
  • the motor and the compression mechanism section are disposed in the same closed container. Therefore, the motor is exposed to high-temperature coolant and heated, and the efficiency is lowered. Further, during the operation of the compressor, the coolant circulating during the refrigerating cycle conveys additional heat generated by the motor coil. Thus the efficiency of the refrigerating cycle is lowered.
  • an objective of the present invention is to provide a highly-efficient compressor and a refrigerating cycle apparatus equipped with the same.
  • a compressor including an axial gap motor for driving the compressor, the axial gap motor having a stator and a rotor, the stator having a plurality of small stators each having a small stator core, the small stator core being made of magnetic steel sheet and having a wire wound therearound, the rotor having a magnet facing to the stator, wherein the stator is disposed outside of a closed chamber, the rotor is connected to a mechanical section of the compressor, and the compressor is driven by magnetic induction therebetween.
  • a high-pressure chamber compressor including a compression chamber, a compression mechanism section including a motor is disposed in the compression chamber, rotation of a rotor of the motor compressing coolant at high temperature and pressure, wherein the high temperature and pressure coolant fills up the compression chamber and is discharged thereafter, the motor is an axial gap motor, the compression chamber further includes a closed chamber and an open chamber separated by a magnetic induction plate, the closed chamber is filled with the high temperature and pressure coolant, and the rotor is disposed in the closed chamber.
  • FIG. 1 is a cross-section outline drawing illustrating a compressor driven by an axial gap motor according to a first embodiment of the present invention
  • FIGS. 2A and 2B are a structural outline drawing illustrating a rotor of the axial gap motor according to the first embodiment of the present invention
  • FIGS. 3A to 3D are structural outline drawings illustrating cross-sections of a magnetic induction member according to the first embodiment of the present invention
  • FIGS. 4A to 4D are outline drawings illustrating a stator of the axial gap motor according to the first embodiment of the present invention
  • FIG. 5 is a cross-section outline drawing illustrating a stator of the axial gap motor according to the first embodiment of the present invention
  • FIG. 6 is a cross-section outline drawing illustrating a compressor driven by an axial gap motor according to a second embodiment of the present invention
  • FIGS. 7A to 7C are structural outline drawings illustrating cross-sections of a magnetic induction member according to the second embodiment of the present invention.
  • FIG. 8 is a cross-section outline drawing illustrating a compressor driven by an axial gap motor according to a third embodiment of the present invention.
  • FIG. 9 is an outline drawing illustrating a refrigerating cycle of an air conditioner according to the fourth embodiment of the present invention.
  • FIG. 1 is a cross-section outline drawing illustrating a compressor driven by an axial gap motor according to a first embodiment of the present invention. Embodiment 1 will be explained with reference to FIGS. 1 to 5 .
  • a compressor 82 is configured with a closed chamber 69 having a coolant compression mechanism section and a stator chamber 79 having a stator 2 which constitutes an axial gap motor, and the closed chamber 69 and the stator chamber 79 are separated from each other by a magnetic induction plate 50 .
  • the compression mechanism section is configured by engaging a spiral wrap 62 and a spiral wrap 65 , the spiral wrap 62 standing erect on an end plate 61 of a fixed scroll member 60 , and the spiral wrap 65 standing erect on an endplate 64 of a turn scroll member 63 .
  • the fixed scroll member 60 is press fitted into a casing of the compressor and fixed by welding. Then compression of the coolant is performed by making the turn scroll member 63 turn via a crankshaft 4 .
  • Each of compression spaces 66 ( 66 a , 66 b . . . ) is defined by the fixed scroll member 60 and the turn scroll member 63 .
  • the outermost compression space 66 moves inward toward the center of the scroll members 60 and 63 along with the turning motion and the volume is reduced gradually.
  • compressed coolant is discharged from a discharge hole 67 .
  • Discharged gas comes into a closed chamber 69 located on a lower portion of a frame 68 by way of a gas passage (not shown) disposed in the fixed scroll member 60 and the frame 68 , and then discharged via a discharge pipe 70 disposed on a side wall of the closed chamber 69 to outside the compressor.
  • Each of the closed chamber 69 , the turn scroll member 63 and the rotor 3 is connected to the crankshaft 4 . While the rotor 3 is rotating, the turn scroll member 63 is turning also with the rotation of the crankshaft 4 , thereby compressing the coolant.
  • An oil-retaining space 71 is disposed at the bottom of the closed chamber 69 . Due to pressure difference between a back-pressure room and the closed chamber 69 , oil in the oil-retaining space 71 is sent through an oil gallery 72 in the crankshaft 4 and supplied for lubrication of the slide portion of the turn scroll member 63 and the crankshaft 4 , and slide bearing 73 etc.
  • FIGS. 2A and 2B are an outline drawing illustrating a rotor 3 , and the rotor 3 is made of nonmagnetic material (metal, or possibly non-metal).
  • Permanent magnets 17 are fixed to the disc-shaped rotor 3 with adhesive, and then magnetized such that adjacent magnets having opposite polarity by applying pulse current using a magnetizing device.
  • the permanent magnet 17 may be made of ferrite or possibly rare earth magnet.
  • the shape thereof may be roughly fan-shaped (possibly rectangle, square, oval, circle etc.), and the thickness thereof may be even (or possibly uneven).
  • FIGS. 3A to 3D are outline drawings illustrating cross-sections of a magnetic induction plate 50 .
  • FIG. 3B shows a cross-section in an axial direction
  • FIGS. 3A , 3 C and 3 D show a cross-section in an a radial direction.
  • the magnetic induction plate 50 includes a non-magnetic metal disc 51 having an external diameter slightly smaller than the inner diameter of the closed chamber 69 (thickness is 5 to 15 mm, material is stainless etc.), and a plurality of magnetic bodies 52 a (magnetic steel sheet, amorphous material, powder magnetic core etc.).
  • holes 52 of the same number of pieces and roughly same size as a small stator 16 are formed in a shape of annular array and a plurality of magnetic bodies 52 a are fixed by welding for example.
  • the magnetic body 52 a may be configured to have a shape shown in FIG. 3C or 3 D.
  • the magnetic induction plate 50 is welded to a casing 18 of the compressor such that the magnetic induction plate 50 separates the closed chamber 69 from the stator chamber 79 .
  • the high-pressure chamber filled with high-pressure coolant gas and the stator chamber 79 in which the stator of the motor is disposed are separated by the magnetic induction plate 50 .
  • the stator 2 of the axial gap motor is configured by setting and molding a plurality of small stators 16 and a magnetic induction end plate 7 on a holder 8 . Then it is fixed to the casing 18 .
  • the stator 2 is press-fitted to the stator chamber 79 , and then fixed with an air gap of 0.3 to 1.5 mm from the magnetic induction plate 50 .
  • the lead line of the coil passes through a hole 92 on the stator chamber 79 and is connected to a terminal block 91 .
  • a cover 31 is attached on the casing 18 of the compressor with volts.
  • FIGS. 4A to 4D are outline drawings illustrating a small stator 16 of the axial gap motor.
  • a unit of a member 11 which is made of nonmagnetic material, having a constant length, and is roughly fan-shaped (possibly rectangle, square, oval, circle etc.), is made by plastic molding or the like. Then amorphous ribbon having one-side insulating coating is wound around the member 11 . Upon reaching a predetermined size, the amorphous ribbon is cut off, the member 11 is hardened with adhesive or plastic coating, or the stator core is fixed by an insulating paper 13 with adhesive. Thus the small stator core 14 made of amorphous material, as shown in a cross-section shown in FIG. 4B , is produced.
  • the small stator core 14 a can be made by laminating a magnetic steel sheet, and coating the outer periphery with insulating material such as plastic. Further, a coil 15 is wound around the small stator core 14 (or 14 a ), end wires 15 a and 15 b of the coil 15 are lead out, and thus the small stator 16 is formed as shown in FIG. 4D .
  • FIG. 5 is a sectional view in an axial direction of the stator.
  • holes 20 are made on the periphery of the holder 8 with constant distance apart from each other, and then a plurality of the small stators 16 are mounted and fixed to the holes 20 .
  • the number of the small stators 16 is 3n (here, n represents natural numbers).
  • End wires of the three-phase coil (U, V, W) are made by connecting the end wires 15 a and 15 b of the small stator 16 . Then the plastic is flown and the integrated stator 2 is molded.
  • the axial gap motor is formed such that a plurality of magnetic bodies 52 a is disposed with an air gap to the rotor 3 on both sides thereof including a plurality of permanent magnets 17 attached on the rotor 3 and the stator 2 .
  • the gap of the axial gap motor is 0.3 mm to 1.5 mm. Although the gap is the smaller the better, since the magnetic induction plate 50 takes a roll of a partition, it is necessary to make consideration about deformation volume thereof.
  • the magnetic induction plate 50 is used as a partition.
  • the magnetic induction plate 50 takes this role. Not only separating the chamber, it is also necessary to transfer the rotating magnetic field of the stator 2 to the rotor 3 .
  • a magnetic body 52 a (c, d) on the magnetic induction plate 50 takes this role.
  • a magnetic induction member is provided on both end faces of the axial gap motor in an axial direction of the stator, and the compressor is driven by the magnetic induction. Maintenance can be improved as the stator 2 is disposed outside the closed chamber 69 .
  • a three-phase coil is provided on each of the small stators 16 .
  • Rotating magnetic field can be generated by controlling current of an inverter in an axial direction on both end faces of the stator 2 .
  • the flux reaches to a plurality of permanent magnet 17 on the rotor 3 disposed in the closed chamber 69 by way of the magnetic body 50 which is a magnetic inductor, and then magnetic attraction or magnetic repulsion is generated between the magnetic body 52 a ( c, d ) and the permanent magnet 17 .
  • the rotor 3 rotates synchronously with the rotating magnetic field.
  • the turn scroll member 63 which is connected to the crankshaft 4 also rotates in conjunction with the rotor 3 , thereby operating the compressor.
  • the rotor 3 may be magnetized using a dedicated yoke tool, and then connected to the mechanical section of the compressor.
  • the magnetic disc 7 is made of a magnetic body such as a magnetic steel sheet, annular-shaped, and the area in a radial direction covers a plurality of small stators 16 .
  • the flux generated from a plurality of the small stators 16 is guided to the magnetic body 52 a .
  • stator of the motor in the present embodiment comprises 12-pole and the rotor comprises 8-pole
  • stator 2 and the rotor 3 may be configured to have another combination of pole numbers.
  • FIG. 6 is a cross-section outline drawing illustrating a compressor driven by an axial gap motor according to a second embodiment of the present invention.
  • FIG. 7B is a cross-section in an axial direction of a magnetic induction member according to the second embodiment.
  • FIGS. 7A and 7C are cross-sections in a radial direction of a magnetic induction member according to the second embodiment.
  • the magnetic induction plate 50 is configured with a disc 51 made of nonmagnetic material and having an outer diameter slightly smaller than the inner diameter of the closed chamber 69 (e.g. 5 to 10 mm in thickness, made of stainless), and a plurality of magnetic bodies 52 e (e.g. magnetic steel sheet, powder magnetic core).
  • a disc 51 made of nonmagnetic material and having an outer diameter slightly smaller than the inner diameter of the closed chamber 69 (e.g. 5 to 10 mm in thickness, made of stainless), and a plurality of magnetic bodies 52 e (e.g. magnetic steel sheet, powder magnetic core).
  • holes 52 of the same number and roughly same size as the small stator cores 14 a (or 14 ) are formed in a shape of annular array and a plurality of magnetic bodies 52 e are fixed by welding as shown in FIG. 7C .
  • a plurality of the magnetic bodies 52 e are coated with insulating material such as plastic, and then the coil 15 is wound therearound.
  • insulating material such as plastic
  • the magnetic induction component 54 having the stator is mounted to the casing of the compressor 82 with a constant air gap of 0.3 mm to 1.5 mm.
  • the gap is the smaller the better as there is almost no bending of the nonmagnetic plate 51 .
  • Embodiment 2 receives full benefit of Embodiment 1, and in addition, the efficiency of the motor is considerably improved.
  • FIG. 8 is a cross-section outline drawing illustrating a compressor driven by an axial gap motor according to a third embodiment of the present invention.
  • the compressor according to Embodiment 3 includes two closed chambers 69 arranged on both end faces with an air gap of 0.3 mm to 1.5 mm.
  • the closed casing 18 of the compressor and the casing 19 of the axial gap motor are fixed using volts.
  • the configuration of the closed chamber 69 having coolant compression mechanism section is same as the Embodiments 1 and 2, the redundant explanation will be omitted.
  • the stator 2 a of the axial gap motor according to the present embodiment is not provided with a magnetic disc 7 .
  • Other components are the same as those of the stator 2 and disposed in the stator chamber 79 .
  • a magnetic induction member is provided on both end faces in an axial direction of the axial gap motor, and the compressor is driven by magnetic induction.
  • the compressor of Embodiment 3 receives full benefit of Embodiments 1 and 2, and in addition, a compressor having capacity larger than Embodiments 1 and 2 can be achieved.
  • FIG. 9 is an outline drawing illustrating a refrigerating cycle of an air conditioner according to a fourth embodiment of the present invention.
  • a symbol 80 represents outdoor equipment and a symbol 81 represents indoor equipment.
  • a compressor 82 is filled with coolant.
  • a condenser 84 , an expansion valve 85 , and an evaporator 86 are connected via pipes.
  • Each of the outdoor equipment 80 and the indoor equipment 81 is provided with a fan 88 and a motor. The fan is rotated by operation of the compressor 82 , and heat exchange is performed between the coolant in the cooling unit and surrounding air. Due to the refrigerating cycle, the coolant is circulated in a direction indicated with the arrows.
  • the compressor 82 compresses the coolant, performs heat exchange between the outdoor equipment 80 and the indoor equipment 81 , thereby performing cooling operation.
  • the compressor 82 compresses the coolant, performs heat exchange between the outdoor equipment 80 and the indoor equipment 81 , thereby performing cooling operation.
  • a four-way valve (not shown) and reversing the direction of the refrigerating cycle, heating operation can be performed.
  • the operation is reversed between cooling and heating, the relation between the condenser 84 and the evaporator 86 is also reversed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Compressor (AREA)
US13/479,438 2011-05-27 2012-05-24 Compressor and Refrigerating Cycle Apparatus Abandoned US20120301334A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-118603 2011-05-27
JP2011118603A JP2012246819A (ja) 2011-05-27 2011-05-27 圧縮機及び冷凍サイクル装置

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JP (1) JP2012246819A (ja)
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2883996A1 (de) * 2013-12-11 2015-06-17 BSH Hausgeräte GmbH Kompressorbaugruppe für einen eine Wärmepumpe aufweisenden Wäschetrockner, sowie entsprechender Wäschetrockner
EP3683443A1 (en) * 2019-01-18 2020-07-22 LG Electronics Inc. Motor-operated compressor
EP3576261A4 (en) * 2017-01-25 2020-08-19 Hitachi Industrial Equipment Systems Co., Ltd. ENGINE AND COMPRESSOR WITH USE OF IT
US11603839B2 (en) * 2017-01-27 2023-03-14 Hitachi Industrial Equipment Systems Co., Ltd. Scroll compressor with two step inverter control

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5836859B2 (ja) * 2012-03-19 2015-12-24 日立アプライアンス株式会社 モータ制御装置、及びこれを用いたモータ駆動装置、圧縮機、冷凍装置、空気調和機、並びにモータ制御方法
JP2014150695A (ja) * 2013-02-04 2014-08-21 Toshiba Carrier Corp 永久磁石電動機、密閉型圧縮機および冷凍サイクル装置
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

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Publication number Priority date Publication date Assignee Title
JPH04121478A (ja) * 1990-09-12 1992-04-22 Toshiba Corp スクロール型圧縮機
CN2400961Y (zh) * 1999-12-10 2000-10-11 大连金山耐酸泵有限公司 一种盘式电动机
JP2006274807A (ja) * 2005-03-28 2006-10-12 Hitachi Ltd 横形スクロール圧縮機
JP4774821B2 (ja) * 2005-06-14 2011-09-14 ダイキン工業株式会社 圧縮機
JP2008202455A (ja) * 2007-02-19 2008-09-04 Daikin Ind Ltd 圧縮機
JP2011047355A (ja) * 2009-08-28 2011-03-10 Daikin Industries Ltd 圧縮機

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2883996A1 (de) * 2013-12-11 2015-06-17 BSH Hausgeräte GmbH Kompressorbaugruppe für einen eine Wärmepumpe aufweisenden Wäschetrockner, sowie entsprechender Wäschetrockner
EP3576261A4 (en) * 2017-01-25 2020-08-19 Hitachi Industrial Equipment Systems Co., Ltd. ENGINE AND COMPRESSOR WITH USE OF IT
US11251677B2 (en) 2017-01-25 2022-02-15 Hitachi Industrial Equipment Systems Co., Ltd. Motor and compressor that uses same
US11603839B2 (en) * 2017-01-27 2023-03-14 Hitachi Industrial Equipment Systems Co., Ltd. Scroll compressor with two step inverter control
EP3683443A1 (en) * 2019-01-18 2020-07-22 LG Electronics Inc. Motor-operated compressor

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CN102797675A (zh) 2012-11-28
JP2012246819A (ja) 2012-12-13

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Owner name: HITACHI APPLIANCES, INC., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HUANG, BAIYING;YONEYAMA, HIROYASU;SAKURAI, KAZUO;REEL/FRAME:028411/0833

Effective date: 20120425

STCB Information on status: application discontinuation

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