WO2019073659A1 - 密閉型電動圧縮機 - Google Patents

密閉型電動圧縮機 Download PDF

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Publication number
WO2019073659A1
WO2019073659A1 PCT/JP2018/028175 JP2018028175W WO2019073659A1 WO 2019073659 A1 WO2019073659 A1 WO 2019073659A1 JP 2018028175 W JP2018028175 W JP 2018028175W WO 2019073659 A1 WO2019073659 A1 WO 2019073659A1
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WO
WIPO (PCT)
Prior art keywords
oil
motor
refrigerant
insulator
electric compressor
Prior art date
Application number
PCT/JP2018/028175
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
太我 後藤
哲司 舟津
嘉文 松本
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.)
Filing date
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
Priority to CN201880065206.9A priority Critical patent/CN111183290B/zh
Priority to JP2019547919A priority patent/JP7113354B2/ja
Publication of WO2019073659A1 publication Critical patent/WO2019073659A1/ja

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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
    • F04C29/02—Lubrication; Lubricant separation

Definitions

  • the present invention relates to a hermetic electric compressor used for an air conditioner, a refrigerator, or a heat pump type hot water supply system.
  • a sealed electric compressor generally used for an air conditioner or a refrigerator has a motor unit including a rotor and a stator inside a sealed container, a compression mechanism unit connected to the motor unit, and a bottom portion inside the sealed container. And an oil reservoir for storing oil. Then, the refrigerant is compressed by the compression mechanism portion, and the compressed refrigerant is guided to the upper portion of the sealed container through the air gap between the rotor and the stator of the motor portion, and discharged from the discharge pipe to the outside of the sealed container. ing.
  • the compressed refrigerant entraps the oil accumulated in the bottom of the sealed container. Therefore, if the refrigerant and the oil are not sufficiently separated in the closed container, the oil will flow out to the refrigeration cycle circuit outside the closed container, thereby reducing the cooling efficiency and running out of oil in the closed container. As a result, there is a possibility that the operation of the compression mechanism can not be performed smoothly.
  • an oil separating plate is provided above the air gap between the rotor and the stator of the motor unit (see, for example, Patent Document 1).
  • FIG. 7 shows a sealed electric compressor disclosed in Patent Document 1, in which a compression mechanism portion 102 and a motor portion 103 for driving the same are provided in a sealed container 101, and the motor portion 103 is provided with a rotor 104 thereof.
  • An oil separation plate 107 is provided above the air gap 106 between the stator and the stator 105.
  • the refrigerant from the air gap 106 collides with the oil separation plate 107 to separate the oil, and the oil discharged to the outside of the sealed container 101 is reduced.
  • the sealed type electric compressor of the above configuration is a structure provided with a distributed winding electric motor. Assuming that a concentrated winding motor is provided instead of the distributed winding motor in the above configuration, a gap is formed between the winding of the winding portion wound around the iron core of stator 105 and the winding. The refrigerant passes through the winding portion wound around 105.
  • the present invention provides a sealed electric compressor that can reduce the oil discharged to the outside of the sealed container even if a concentrated winding motor is used.
  • the present invention includes a sealed container storing oil, a motor unit provided inside the sealed container, and a compression mechanism unit driven by the motor unit to compress a refrigerant.
  • the motor unit has a configuration in which the refrigerant compressed by the compression mechanism unit as a concentrated winding motor flows into the upper space of the sealed container through the gap between the windings wound around the stator core of the motor unit.
  • An oil separation plate is provided in the upper space side of the motor unit and in a portion facing the gap between the windings wound around the stator core.
  • FIG. 1 is a longitudinal sectional view of a hermetic electric compressor according to a first embodiment of the present invention.
  • FIG. 2 is a plan sectional view taken along line 2-2 of FIG.
  • FIG. 3 is a plan view showing the motor unit in a state in which the oil separation plate of the hermetic electric compressor according to the first embodiment of the present invention is removed.
  • FIG. 4 is a perspective view showing a motor unit of the hermetic electric compressor according to the first embodiment of the present invention.
  • FIG. 5 is an exploded perspective view of a motor section excluding the winding of the hermetic electric compressor according to the first embodiment of the present invention.
  • 6 is a cross-sectional view taken along line 6-6 of FIG.
  • FIG. 7 is a longitudinal sectional view of a conventional hermetic electric compressor.
  • FIG. 1 is a longitudinal sectional view of a hermetic electric compressor according to a first embodiment of the present invention.
  • FIG. 2 is a plan sectional view cut along line 2-2 of FIG.
  • FIG. 3 is a plan view showing a motor section in a state in which the oil separation plate of the hermetic electric compressor according to the first embodiment of the present invention is removed.
  • FIG. 4 is a perspective view showing a motor unit of the hermetic motor compressor according to the first embodiment of the present invention.
  • the hermetic electric compressor according to the present embodiment is provided with the motor unit 2, the compression mechanism unit 3 disposed below the motor unit 2, and the oil reservoir 4 disposed at the bottom in the hermetic container 1. .
  • the compression mechanism section 3 is constituted by a twin rotary compression mechanism, sucks and compresses the refrigerant from the accumulator 5, and discharges the compressed refrigerant to the lower space 6 of the motor section 2 in the closed container 1. .
  • the motor unit 2 comprises a rotor 7 and a stator 8 formed by laminating a plurality of electromagnetic steel plates, and the compression mechanism unit 3 is driven by the rotating shaft 9 of the rotor 7.
  • the motor unit 2 is a concentrated winding motor, and its stator 8 is wound via the resin insulator 12 shown in FIG. 4 to the teeth portion 11 provided on the stator core 10 as shown in FIG. 14 is wound and comprised.
  • the stator core 10 is fixed to the inner wall surface of the closed container 1 by shrink fitting, and the notch groove 15 is provided on the outer periphery thereof to provide the outer peripheral surface of the stator core 10 with the inner wall surface of the closed container 1.
  • a through passage 16 shown in FIGS. 1 and 2 which is a passage for the refrigerant is formed therebetween.
  • the insulator 12 insulates between the stator core 10 and the winding 14, and makes the upper end of the annular wall 17 (see FIG. 5) located at the outer peripheral portion of the winding 14 uneven as well as The part is provided with several claws 18.
  • the winding 14 wound around the tooth portion 11 of the stator core 10 is concentrated winding, and a gap 19 is generated between adjacent windings 14 as shown in FIG. Therefore, the refrigerant discharged to the lower space 6 of the motor unit 2 flows to the upper space 20 of the closed container 1 through the gap 19 between the windings 14.
  • the motor section 2 is provided with an oil separating plate 22 made of resin so as to cover the gap 19 above the gap 19, that is, on the upper space 20 side.
  • the oil separation plate 22 is formed in a donut plate shape as shown in FIGS. 4 to 6, and the portion facing the gap 19 between the windings 14 is a non-perforated portion 23 and the top of the winding 14 An opening 24 is provided at a portion facing the end. Further, through holes 25 as engaging portions are provided at several places on the outer periphery of the oil separating plate 22.
  • the oil separating plate 22 is attached to the insulator 12 by fitting the through hole 25 as the engaging portion to the claw 18 as the locking portion provided on the outer peripheral portion of the insulator 12.
  • the oil separating plate 22 has a cutout 27 at an appropriate position on the outer periphery.
  • the lead wire 28 from the winding 14 is drawn out from the notch opening 27 and one of the through holes 25 to be fitted to the claw piece 18 of the insulator 12 is provided near the notch opening 27 from which the lead wire 28 is drawn is there.
  • the oil separating plate 22 is provided with annular ribs 29a and 29b which project downward toward the motor unit 2 on the inner and outer peripheral portions thereof.
  • the outer annular rib 29a has a shorter projecting dimension than the inner annular rib 29b, and as shown in FIG. 4, forms a gap 30 through which the refrigerant flows between the irregularities of the upper end of the annular wall 17 of the insulator 12.
  • the refrigerant compressed by the compression mechanism 3 is discharged to the lower space 6 of the motor 2 and the oil is collected in the bottom of the hermetic container 1. It flows toward the upper space 20 of the closed vessel 1 through the gap 19 formed between the windings 14 of the stator 8 constituting the same.
  • the oil separation plate 22 is provided above the gap 19 formed between the windings 14 of the stator 8 constituting the motor unit 2 so as to cover the gap 19, the coils 14
  • the refrigerant passing through the gap 19 collides with the non-porous portion 23 of the oil separating plate 22, and the oil is separated from the refrigerant.
  • the refrigerant after oil separation flows into the upper space 20 of the closed container 1 through the opening 24 provided in the oil separation plate 22, and is discharged from the discharge pipe 21 to the outside of the closed container 1.
  • the opening 24 provided in the oil separation plate 22 is formed in a portion facing the winding 14, the refrigerant comes in contact with the winding 14 when passing through the opening 24, and the winding 14 is touched. Also separates the oil from the refrigerant.
  • the oil separation plate 22 is formed in a donut plate shape, and annular ribs 29a and 29b which project downward toward the motor unit 2 are provided on the inner peripheral portion and the outer peripheral portion thereof.
  • the projecting dimension of the annular rib 29a in the outer peripheral portion is lower than the projecting dimension of the annular rib 29b in the inner peripheral portion, so that oil is prevented from traveling from the central hole of the oil separating plate 22 to the upper space 20.
  • the amount of oil discharged to the outside of the closed container 1 can be further reduced.
  • the oil which collides with the non-porous portion 23 of the oil separation plate 22 and is separated flows with the refrigerant toward the annular rib 29a on the outer peripheral side having a short projecting dimension, and from the lower end of the annular rib 29a As it flows toward the through passage 16 formed between the outer circumference of the container and the inner wall surface of the sealed container 1, it smoothly returns from the through passage 16 to the oil reservoir 4. Therefore, it is possible to suppress the oil separated by the oil separation plate 22 from being rolled up by the refrigerant again and discharged to the outside of the sealed container 1, and to provide a high oil separation effect.
  • the oil separation plate 22 which brings about the above-mentioned oil separation effect is attached to the insulator 12 with the through holes 25 provided on the outer periphery proper portion engaged with the claws 18 provided on the insulator 12 of the motor unit 2 Even if the refrigerant blown up through the gap 19 formed between the windings 14 passes through and collides with the oil separating plate 22, the oil separating plate 22 does not come off from the insulator 12, so It becomes fixed and held. Therefore, the oil separation plate 22 does not come off carelessly, and the reliability can be improved.
  • the oil separating plate 22 draws the lead wire 28 of the winding 14 of the motor unit 2 from the notched opening 27 provided on the outer peripheral edge thereof, but the drawing of the lead wire 28 is via the outer peripheral opening of the notched opening 27 As a result, the lead wire drawing operation can be facilitated and the assemblability can be improved.
  • the oil separation plate 22 may receive a strong force because the lead wire 28 is caught at the opening edge of the notch opening 27, but the portion where the notch opening 27 is formed is in the vicinity Since the through holes 25 provided in the above are engaged with the hooks 18 of the insulator 12, the oil separating plate 22 is inadvertently detached by the routing of the lead wire 28, or the peripheral portion of the notch opening 27 is warped and cracked It is possible to prevent such things. Therefore, the reliability can also be high.
  • the present invention is not limited to the sealed electric compressor using the rotary compression mechanism as described above, and other compression mechanisms such as a scroll compression mechanism may be used. It is good also as a sealed type electric compressor used.
  • the hermetic electric compressor according to the first disclosure includes the hermetic container storing oil, the motor unit provided inside the hermetic container, and the compression mechanism unit driven by the motor unit to compress the refrigerant.
  • the motor unit has a configuration in which the refrigerant compressed by the compression mechanism unit as a concentrated winding motor flows into the upper space of the sealed container through the gap between the windings wound around the stator core of the motor unit.
  • An oil separation plate is provided in the upper space side of the motor unit and in a portion facing the gap between the windings wound around the stator core.
  • the sealed electric compressor in the second disclosure may have an opening in a portion facing the winding wound on the stator core of the oil separation plate in the first disclosure.
  • the refrigerant that has passed through the gap between the windings wound around the stator core collides with the oil separating plate and then passes through the opening of the oil separating plate and passes through the oil separating plate, but when passing through the opening
  • the oil can be separated by touching the winding, and the oil separation effect can be enhanced.
  • a notch groove is provided on the outer periphery of the stator core of the motor portion to provide a refrigerant passage between the inner wall of the sealed container.
  • a through passage may be formed.
  • the oil separating plate is formed in a donut plate shape, and an annular rib is provided on the inner and outer peripheral portions of the oil separating plate so as to protrude toward the motor portion side. May be shorter than the projecting dimension of the inner circumferential portion.
  • the oil that collides with the oil separating plate and is separated from the refrigerant is a through passage between the outer peripheral annular rib with a short protrusion dimension, that is, the outer peripheral lower direction, that is, the outer periphery of the stator core and the inner wall surface of the hermetic container. Flow toward Therefore, the oil smoothly returns to the oil reservoir through the through passage, and the effect of separating the oil from the refrigerant can be further enhanced.
  • the sealed electric compressor according to the fourth disclosure provides the engagement portion at an appropriate position on the outer periphery of the oil separation plate and engages with an insulator provided on a stator core of the motor.
  • the oil separation plate may be attached to the insulator by providing a locking portion engaged with the portion and engaging the engagement portion of the oil separation plate with the locking portion of the insulator.
  • the oil separation plate can be securely fixed, and the oil separation plate can be highly reliable without coming off due to the collision of the refrigerant and the like.
  • the sealed electric compressor according to the fifth aspect of the present invention is, in the fourth aspect, provided with a notch opening for drawing out the lead wire of the motor winding on the outer peripheral edge of the oil separating plate and engaging with the locking portion of the insulator.
  • One of the engaging portions may be provided in the vicinity of the cutout opening.
  • the lead-out port of the winding wire of the motor provided in the oil separation plate is formed as a notch opening, so lead wire can be pulled out through the opening portion of the notch opening, and lead wire extraction is easy It can do. Furthermore, even if a strong force is applied to the opening of the notch opening when the lead wire is pulled out, the engagement part of the insulator is engaged with the engaging part provided in the vicinity of the cutout opening, so the oil separation plate is not prepared It can be made more reliable without coming off or cracking.
  • the present invention can provide an excellent closed type electric compressor with little oil discharge, and can be widely used as a closed type electric compressor of various devices using a refrigeration cycle, such as an air conditioner and a refrigerator.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
PCT/JP2018/028175 2017-10-10 2018-07-27 密閉型電動圧縮機 WO2019073659A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880065206.9A CN111183290B (zh) 2017-10-10 2018-07-27 密闭型电动压缩机
JP2019547919A JP7113354B2 (ja) 2017-10-10 2018-07-27 密閉型電動圧縮機

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017196515 2017-10-10
JP2017-196515 2017-10-10

Publications (1)

Publication Number Publication Date
WO2019073659A1 true WO2019073659A1 (ja) 2019-04-18

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ID=66100029

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Application Number Title Priority Date Filing Date
PCT/JP2018/028175 WO2019073659A1 (ja) 2017-10-10 2018-07-27 密閉型電動圧縮機

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JP (1) JP7113354B2 (zh)
CN (1) CN111183290B (zh)
WO (1) WO2019073659A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5294206U (zh) * 1976-01-12 1977-07-14
JPS62247188A (ja) * 1986-04-21 1987-10-28 Hitachi Ltd ロ−タリ圧縮機
JP2002235666A (ja) * 2001-02-09 2002-08-23 Toshiba Kyaria Kk 密閉形圧縮機
JP2007159192A (ja) * 2005-12-01 2007-06-21 Matsushita Electric Ind Co Ltd 無刷子電動機及びそれを具備した密閉型圧縮機
JP2009299676A (ja) * 2008-01-24 2009-12-24 Daikin Ind Ltd 圧縮機
JP2015140660A (ja) * 2014-01-27 2015-08-03 日立アプライアンス株式会社 電動圧縮機

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH057988U (ja) * 1991-07-16 1993-02-02 株式会社東芝 ロータリコンプレツサ
JP2000232746A (ja) 1999-02-10 2000-08-22 Toshiba Corp 圧縮機用電動機の固定子および電動圧縮機
JP3670890B2 (ja) 1999-06-29 2005-07-13 三洋電機株式会社 密閉型回転圧縮機
JP2001323886A (ja) * 2000-05-16 2001-11-22 Matsushita Electric Ind Co Ltd ロータリ圧縮機
CN104500405A (zh) * 2014-12-09 2015-04-08 广东美芝制冷设备有限公司 低背压旋转式压缩机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5294206U (zh) * 1976-01-12 1977-07-14
JPS62247188A (ja) * 1986-04-21 1987-10-28 Hitachi Ltd ロ−タリ圧縮機
JP2002235666A (ja) * 2001-02-09 2002-08-23 Toshiba Kyaria Kk 密閉形圧縮機
JP2007159192A (ja) * 2005-12-01 2007-06-21 Matsushita Electric Ind Co Ltd 無刷子電動機及びそれを具備した密閉型圧縮機
JP2009299676A (ja) * 2008-01-24 2009-12-24 Daikin Ind Ltd 圧縮機
JP2015140660A (ja) * 2014-01-27 2015-08-03 日立アプライアンス株式会社 電動圧縮機

Also Published As

Publication number Publication date
JPWO2019073659A1 (ja) 2020-11-05
CN111183290A (zh) 2020-05-19
JP7113354B2 (ja) 2022-08-05
CN111183290B (zh) 2023-03-28

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