WO2018207737A1 - Compresseur fermé et dispositif de réfrigération utilisant ce dernier - Google Patents

Compresseur fermé et dispositif de réfrigération utilisant ce dernier Download PDF

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Publication number
WO2018207737A1
WO2018207737A1 PCT/JP2018/017652 JP2018017652W WO2018207737A1 WO 2018207737 A1 WO2018207737 A1 WO 2018207737A1 JP 2018017652 W JP2018017652 W JP 2018017652W WO 2018207737 A1 WO2018207737 A1 WO 2018207737A1
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WO
WIPO (PCT)
Prior art keywords
shaft
rotor
hermetic compressor
fixed
cylinder
Prior art date
Application number
PCT/JP2018/017652
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English (en)
Japanese (ja)
Inventor
飯田　登
Original Assignee
パナソニックＩｐマネジメント株式会社
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.)
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Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2018207737A1 publication Critical patent/WO2018207737A1/fr

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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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures

Definitions

  • the present invention relates to a hermetic compressor and a refrigeration apparatus such as a home electric refrigerator-freezer or a showcase using the same.
  • FIG. 4 is a longitudinal sectional view of a compression mechanism and an electric element of a conventional hermetic compressor described in Patent Document 1.
  • the conventional hermetic compressor includes a shaft 8 for driving a compression mechanism including a main shaft 4 and an eccentric shaft 6, and a bearing 10 that supports the main shaft 4.
  • a sliding portion 12 is formed, and a sliding portion 14 is formed on the inner peripheral surface of the bearing 10.
  • the electric element 18 that rotationally drives the shaft 8 is an outer rotor type motor, and includes a stator 20 and a rotor 22 that is disposed coaxially with the stator 20 so as to surround the stator 20. .
  • a permanent magnet 28 is disposed at an outer peripheral end portion 26 of a disk-shaped frame 24, and a cylindrical rotor shaft hole 30 portion formed at the center of the frame 24 is welded or shrink-fitted to the outer periphery of the shaft 8. It is fixed by being equal.
  • the stator 20 is fixed to the outer peripheral surface 23 of the bearing 10 by welding.
  • the thickness of the steel plate of the frame 24 constituting the rotor shaft hole 30 of the rotor 22 is shrink fitting or press fitting. In other words, it cannot withstand the stress generated in the case of, and cannot be firmly fixed.
  • the conventional hermetic compressor has a drawback in terms of durability.
  • the present invention solves the above-mentioned conventional problems, and provides a highly durable hermetic compressor and a refrigeration apparatus using the same so that a rotor can be firmly fixed to a cast iron shaft by welding. It is for the purpose.
  • a hermetic compressor includes an outer rotor type including an electric element and a rotor disposed coaxially with the stator so as to surround the outer periphery of the stator. It is a motor, a steel cylinder is fixed to the shaft of the electric element, and a rotor is welded and fixed to the steel cylinder.
  • a steel cylinder is shrink-fitted onto a shaft and fixed by press-fitting or bonding, and the rotor is welded and fixed to the steel cylinder.
  • the durability of the hermetic compressor and the refrigeration apparatus using the same can be improved.
  • an electric element and a compression element driven by the electric element are accommodated in an airtight container.
  • the compression element includes a shaft composed of a main shaft and an eccentric shaft, and a main shaft of the shaft.
  • a cylinder block having a shaft bearing and a cylinder, a piston that reciprocates in the cylinder, and a connecting means that connects the eccentric shaft and the piston.
  • the electric element includes a stator and a stator.
  • An outer rotor type motor having a rotor arranged coaxially with the stator so as to surround the outer periphery of the motor, and a steel cylinder is fixed to the shaft by, for example, shrink fitting, press fitting, or bonding. The rotor is welded and fixed to the steel cylinder.
  • the rotor of the outer rotor type motor can be firmly fixed to the shaft, so that the durability of the hermetic compressor can be improved.
  • the second invention has a structure in which, in the first invention, the steel cylinder is fixed to the shaft by shrinkage fitting, whereby the steel cylinder can be easily fixed to the shaft.
  • a steel cylinder is fixed to the shaft by press fitting, and thereby the steel cylinder can be more easily fixed.
  • the fourth aspect of the invention is the structure of the first aspect of the invention, wherein the steel cylinder is fixed to the shaft with an adhesive, whereby the steel cylinder can be easily fixed and the shaft is deformed. Can be suppressed.
  • a flange is provided at the end of the steel cylinder on the bearing side, thereby facilitating positioning when welding the rotor to the cylinder. Can be done.
  • the electric element of the hermetic compressor according to any one of the first to fifth aspects is driven by an inverter circuit at a plurality of rotational speeds.
  • the seventh invention is a refrigeration apparatus using the hermetic compressor of any one of the first to sixth inventions, and since the hermetic compressor has high durability, the refrigeration apparatus has durability and reliability. Can be improved.
  • FIG. 1 is a cross-sectional view of a hermetic compressor according to Embodiment 1 of the present invention.
  • the hermetic compressor according to the first embodiment is configured by arranging a compressor body 108 inside a hermetic container 102 formed by drawing a steel plate.
  • the compressor body 108 includes an electric element 104 and a compression element 106 driven by the electric element 104, and is elastically supported by a suspension spring 120.
  • a refrigerant gas 122 such as a hydrocarbon-based R600a having a low global warming potential is at a pressure that is the same as the low pressure side of the refrigeration apparatus (not shown) and in a relatively low temperature state.
  • lubricating oil 124 is sealed at the inner bottom of the sealed container 102.
  • the compression element 106 includes a shaft 126, a cylinder block 128, a piston 130, a connecting means 132, and the like.
  • the shaft 126 includes an eccentric shaft 134 and a main shaft 136, and includes an oil supply mechanism 138 that supplies the oil 124 from the lower end of the main shaft 136 immersed in the oil 124 to the upper end of the eccentric shaft 134.
  • the cylinder block 128 is integrally formed with a cylinder 142 that forms the compression chamber 140 and a bearing 144 that rotatably supports the main shaft 136.
  • the main shaft 136 has a non-sliding portion 146 in which the outer diameter of the main shaft 136 is reduced (formed by hollowing out) at a part of the sliding portion 137 with the inner peripheral surface 135 of the bearing 144. Further, the non-sliding portion 146 of the main shaft 136 is disposed between the upper end and the lower end of the bearing 144.
  • the material of the main shaft 136 is cast iron from the viewpoint of slidability.
  • the electric element 104 is an outer rotor type motor composed of a stator 150 and a rotor 152 arranged coaxially with the stator 150 so as to surround the stator 150.
  • the stator 150 includes a core 160 and a coil 162 wound around the core 160, and fixes the core 160 to the outer periphery of the bearing 144.
  • the rotor 152 is configured by disposing a permanent magnet 158 at an outer peripheral end 156 of a disk-shaped frame 154, and the center of the frame 154 is fixed to the shaft 126.
  • FIG. 2 shows a cross-sectional view of the main part of the peripheral portion including the rotor 152 and the shaft 126 in the same embodiment.
  • the rotor 152 has a cylindrical shaft hole 164 formed at the center of its frame 154.
  • a steel cylinder is formed on the outer periphery of the main shaft 136 so that there is a gap between the lower end of the bearing 144 and the flange 168 calibrated on the upper part of the steel cylinder 166 from the lower end of the bearing 144 in the axial direction.
  • 166 is fixed by shrink fitting.
  • a flange 168 is formed on the upper portion of the steel tube 166. Therefore, the flange 168 of the tube 166 abuts on the upper portion of the shaft hole 164, and the tube 166 extends below the lower end of the shaft hole 164.
  • a shaft hole 164 of the rotor 152 is fixed to the outer periphery of the steel cylinder 166 by welding. Further, the rotor 152 is positioned in the vertical direction when the flange 168 of the steel tube 166 contacts the upper surface of the frame 154.
  • Electric power supplied from a commercial power source (not shown) is supplied to the electric element 104 via an external inverter circuit (not shown), a current flows through the stator 150, a magnetic field is generated, and the spindle 136 is The fixed rotor 152 rotates. Then, the rotation of the rotor 152 causes the shaft 126 to rotate, and the piston 130 reciprocates in the cylinder 142 via the connecting means 132 that is rotatably attached to the eccentric shaft 134, so that the compression element 106 has a predetermined value. Perform compression operation.
  • the frame 154 of the rotor 152 of the outer rotor type motor as in this embodiment is formed by pressing a steel plate.
  • the shaft hole 164 provided at the center of the frame 154 is molded during the press work, but a thin steel plate is used for the press work and for suppressing the material cost.
  • welding, shrink fitting, press fitting, or the like is generally used.
  • the shaft hole 164 of the rotor 152 is formed of a thin steel plate, so that the strength is insufficient and the fixing is not possible.
  • the steel tube 166 is fixed to the main shaft 136 by shrink fitting, and thus the shaft hole 164 of the rotor 152 is fixed to the fixed tube 166 by welding.
  • the rotor 152 can be firmly fixed to the main shaft 136 via the steel cylinder 166. Accordingly, the durability of the hermetic compressor is dramatically improved.
  • the cylinder 166 can be easily fixed to the shaft 126 (main shaft 136). In addition, when bonded, the deformation of the shaft 126 (main shaft 136) can be further suppressed.
  • the axial positioning can be easily performed by applying the shaft hole 164 of the rotor 152 to the flange 168 of the cylinder 166. Therefore, productivity is improved and the rotor 152 can be reliably fixed to the main shaft 136.
  • this hermetic compressor when driven at a plurality of revolutions by an inverter circuit as in this embodiment, a highly durable hermetically sealed type capable of reliable operation from a low revolution speed range to a high revolution speed range. It can be a compressor. That is, in low-speed operation, a torque in the rotational direction is applied between the shaft and the rotor due to torque fluctuations that occur during refrigerant compression. However, since the rotor 152 is firmly fixed to the shaft 126 via the steel cylinder 166, the rotor 152 does not shift even in low-speed operation with large torque fluctuation.
  • FIG. 3 is a schematic diagram showing a configuration of a refrigeration apparatus equipped with the hermetic compressor described in the first embodiment. Here, an outline of the basic configuration of the refrigeration apparatus will be described.
  • the refrigeration apparatus includes a heat-insulating box having an opening on one side, a main body 301 having a door structure that opens and closes the opening, and a compartment that divides the interior of the main body 301 into an article storage space 302 and a machine room 303.
  • a wall 304 and a refrigerant circuit 305 for cooling the inside of the storage space 302 are provided.
  • the refrigerant circuit 305 has a configuration in which the hermetic compressor described in Embodiment 1 as the compressor 306, the radiator 307, the decompression device 308, and the heat absorber 309 are connected in a ring shape. And the heat absorber 309 is arrange
  • this refrigeration apparatus is equipped with the hermetic compressor described in the first embodiment of the present invention as the compressor 306, and this hermetic compressor replaces the rotor 152 of the outer rotor type motor with the steel. Since the durability is improved by being fixed to the main shaft 136 via the made cylinder 166, the durability can be improved.
  • the hermetic compressor and the refrigeration apparatus according to the present invention can improve the durability of the hermetic compressor, it is not limited to household use such as an electric refrigerator or an air conditioner. It can be widely applied to refrigeration devices such as cases and vending machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un élément électromoteur (104) qui est un moteur à rotor externe pourvu d'un stator (150) et d'un rotor (152) qui est disposé de manière coaxiale avec le stator (150) de façon à entourer la périphérie externe du stator (150). Un cylindre en acier (166) est fixé à un arbre (126) de l'élément électromoteur par ajustement fretté, ajustement serré, collage ou analogue, et le rotor (152) est fixé au cylindre en acier (166) par soudage. La configuration susmentionnée permet au rotor (152) d'être fermement fixé à l'arbre (126) à travers le cylindre en acier (166), permettant la fourniture d'un compresseur enfermé hautement durable et d'un dispositif réfrigérant qui utilise le compresseur enfermé.
PCT/JP2018/017652 2017-05-08 2018-05-07 Compresseur fermé et dispositif de réfrigération utilisant ce dernier WO2018207737A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017092100A JP2020112032A (ja) 2017-05-08 2017-05-08 密閉型圧縮機およびそれを用いた冷凍装置
JP2017-092100 2017-05-08

Publications (1)

Publication Number Publication Date
WO2018207737A1 true WO2018207737A1 (fr) 2018-11-15

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PCT/JP2018/017652 WO2018207737A1 (fr) 2017-05-08 2018-05-07 Compresseur fermé et dispositif de réfrigération utilisant ce dernier

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WO (1) WO2018207737A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11437900B2 (en) 2019-12-19 2022-09-06 Black & Decker Inc. Modular outer-rotor brushless motor for a power tool
US11757330B2 (en) 2019-12-19 2023-09-12 Black & Decker, Inc. Canned outer-rotor brushless motor for a power tool

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6011637U (ja) * 1983-07-01 1985-01-26 三菱電機株式会社 発電機用回転子
JPS61214736A (ja) * 1985-03-20 1986-09-24 Hitachi Ltd 密閉形圧縮機
JPS63148842A (ja) * 1986-12-11 1988-06-21 Sankyo Seiki Mfg Co Ltd シヤフトの固定機構
JP2002343016A (ja) * 2001-05-18 2002-11-29 Tokyo Parts Ind Co Ltd ターンテーブル部を備えたスピンドルモータとその製法
JP2003049774A (ja) * 2001-08-06 2003-02-21 Hitachi Ltd 密閉形電動圧縮機及び冷凍・空調装置
JP2005155438A (ja) * 2003-11-26 2005-06-16 Matsushita Electric Ind Co Ltd 密閉型圧縮機
WO2016006229A1 (fr) * 2014-07-07 2016-01-14 パナソニックＩｐマネジメント株式会社 Compresseur hermétique, et dispositif de réfrigération mettant en œuvre celui-ci

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6011637U (ja) * 1983-07-01 1985-01-26 三菱電機株式会社 発電機用回転子
JPS61214736A (ja) * 1985-03-20 1986-09-24 Hitachi Ltd 密閉形圧縮機
JPS63148842A (ja) * 1986-12-11 1988-06-21 Sankyo Seiki Mfg Co Ltd シヤフトの固定機構
JP2002343016A (ja) * 2001-05-18 2002-11-29 Tokyo Parts Ind Co Ltd ターンテーブル部を備えたスピンドルモータとその製法
JP2003049774A (ja) * 2001-08-06 2003-02-21 Hitachi Ltd 密閉形電動圧縮機及び冷凍・空調装置
JP2005155438A (ja) * 2003-11-26 2005-06-16 Matsushita Electric Ind Co Ltd 密閉型圧縮機
WO2016006229A1 (fr) * 2014-07-07 2016-01-14 パナソニックＩｐマネジメント株式会社 Compresseur hermétique, et dispositif de réfrigération mettant en œuvre celui-ci

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11437900B2 (en) 2019-12-19 2022-09-06 Black & Decker Inc. Modular outer-rotor brushless motor for a power tool
US11757330B2 (en) 2019-12-19 2023-09-12 Black & Decker, Inc. Canned outer-rotor brushless motor for a power tool

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