EP2072821A2 - Motor-driven compressor - Google Patents

Motor-driven compressor Download PDF

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Publication number
EP2072821A2
EP2072821A2 EP08171828A EP08171828A EP2072821A2 EP 2072821 A2 EP2072821 A2 EP 2072821A2 EP 08171828 A EP08171828 A EP 08171828A EP 08171828 A EP08171828 A EP 08171828A EP 2072821 A2 EP2072821 A2 EP 2072821A2
Authority
EP
European Patent Office
Prior art keywords
housing
inlet port
motor
inverter
coil
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Withdrawn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
EP08171828A
Other languages
German (de)
English (en)
French (fr)
Inventor
Masao Iguchi
Masahiro Kawaguchi
Ken Suitou
Tatsushi Mori
Hiroshi Fukasaku
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 EP2072821A2 publication Critical patent/EP2072821A2/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • F04C2240/80—Other components
    • F04C2240/808—Electronic circuits (e.g. inverters) installed inside the machine

Definitions

  • the present invention relates to a motor-driven compressor having a compression mechanism, an electric motor and an inverter aligned in a housing in axial direction of a rotary shaft of the compressor.
  • Such compressor is disclosed, for example, in Japanese Unexamined Patent Application Publication No. 2000-291557 .
  • the compressor has a housing assembly (hereinafter referred to as a housing) composed of a front housing, an intermediate housing and a rear housing.
  • the compression mechanism of a scroll-type, the motor and the inverter are aligned in this order in the housing in axial direction of the rotary shaft of the compressor.
  • the motor is controlled by the inverter and drives the compression mechanism for compression of refrigerant gas.
  • a stator of the motor has a coil, and a rotor of the motor is mounted on the rotary shaft.
  • the front housing has a refrigerant inlet port at the periphery. The inlet port is disposed forward of the coil end. In such kind of compressor, there is a need for reduction of its axial length.
  • the inlet port is disposed at a position radially facing the coil end. Therefore, the axial length of the compressor is small, as compared to the case of the reference No. 2000-291557 .
  • the present invention is directed to providing a motor-driven compressor that allows refrigerant gas to flow smoothly from an inlet port into a housing without enlarging the diameter of the housing.
  • a motor-driven compressor includes a housing having an inlet port, a compression mechanism for compression of refrigerant introduced via the inlet port into the housing, an electric motor having a stator core and a coil, an inverter for driving the electric motor, and a rotary shaft rotated by the electric motor thereby to drive the compression mechanism.
  • the compression mechanism, the electric motor and the inverter are aligned in the order in the housing in axial direction of the rotary shaft.
  • the coil has a coil end projecting toward the inverter from the stator core and being disposed adjacent to an inner peripheral surface of the housing.
  • the inlet port is located so as to face the coil end.
  • a recess is formed on the inner peripheral surface of the housing for communicating with the inlet port. The recess extends in the axial direction of the rotary shaft toward the inverter beyond the coil end.
  • Fig. 1 shows a motor-driven compressor 10 of the first embodiment.
  • the compressor 10 is used in a refrigeration circuit 11 of a vehicle air conditioner. It is noted that the right-hand side as viewed in Fig. 1 is the front side of the compressor 10 and the left-hand side is the rear side of the compressor 10.
  • the refrigeration circuit 11 includes a condenser C, an expansion valve V and an evaporator E, as well as the compressor 10.
  • the refrigeration circuit 11 high-pressure and high-temperature refrigerant gas discharged from the compressor 10 is cooled and condensed by the condenser C.
  • the flow of the refrigerant from the condenser C is controlled by the expansion valve V.
  • the refrigerant from the expansion valve V is evaporated in the evaporator E.
  • the refrigeration circuit 11 is provided with a temperature sensor S and a controller CN.
  • the temperature sensor S detects the temperature of the refrigerant from the evaporator E.
  • the controller CN is connected to the expansion valve V for controlling the opening of the expansion valve V in response to a signal from the temperature sensor S.
  • the compressor 10 has a housing assembly 1 (hereinafter referred to as a housing 1) composed of an intermediate housing 12, a rear housing 13 and a front housing 14.
  • the intermediate housing 12 is connected at the rear end thereof to the rear housing 13 via five bolts B1 (only two bolts are shown in Fig. 1 ), and at the front end thereof to the front housing 14 via five bolts B2 (only one is shown).
  • the rear housing 13 forms therein a discharge chamber 15.
  • the rear housing 13 has a discharge port 16 at the rear end.
  • the discharge chamber 15 is connected via the discharge port 16 to the condenser C.
  • the intermediate housing 12 has an inlet port 17 at the periphery thereof adjacent to the front housing 14.
  • the inner space of the intermediate housing 12 is connected via the inlet port 17 to the evaporator E.
  • the intermediate housing 12 accommodates therein a compression mechanism 18 and an electric motor 19 driving the compression mechanism 18 for compressing refrigerant gas.
  • the compression mechanism 18 includes a fixed scroll 20 and a movable scroll 21.
  • the fixed scroll 20 is mounted on the intermediate housing 12.
  • the movable scroll 21 is disposed so as to face the fixed scroll 20 to form a compression chamber 22 therebetween, the volume of which is variable.
  • the movable scroll 21 is coupled to a rotary shaft 23 supported by the intermediate housing 12.
  • the electric motor 19 (hereinafter referred to as the motor 19) includes a rotor 24 and a cylindrical-shaped stator 25.
  • the rotor 24 is mounted on the rotary shaft 23 for rotation therewith in the intermediate housing 12.
  • the rotor 24 has a rotor core 241 mounted on the rotary shaft 23 and permanent magnets 242 mounted on the rotor core 241.
  • the stator 25 has a stator core 251 and a coil 26.
  • the stator core 251 is mounted on an inner peripheral surface 122 of the intermediate housing 12.
  • the coil 26 is wound on the teeth (not shown in the drawing) of the stator core 251.
  • the coil 26 is located adjacent to the inner peripheral surface 122 of the intermediate housing 12.
  • the coil 26 has a radial clearance H1 of about 1 mm from the inner peripheral surface 122 (see Fig. 2 ).
  • the coil 26 has coil ends 261 projecting both forward and rearward from the stator core 251 along the axis L of the rotary shaft 23.
  • the front housing 14 accommodates therein an inverter 30.
  • the inverter 30 is electrically connected to the motor 19 via a harness (not shown in the drawing) and supplies power to the motor 19.
  • the inverter 30 includes a circuit board 301 and electronic components 302 and 303.
  • the circuit board 301 is mounted on the front housing 14.
  • the electronic components 302 are heat-generating components such as switching devices, and mounted on one side of the circuit board 301 adjacent to the intermediate housing 12 while being in contact with an outer end surface 121 of the intermediate housing 12.
  • the electronic components 303 are known components such as electrolytic capacitors, transformers, driver ICs and resistors, and mounted on the other side of the circuit board 301.
  • the compression mechanism 18, the motor 19 and the inverter 30 are aligned in this order in the housing 1 in the axial direction of the rotary shaft 23.
  • the inlet port 17 of the intermediate housing 12 is located so as to face the coil end 261 projecting forward from the stator core 251.
  • a groove 31 is formed on the inner peripheral surface 122 of the intermediate housing 12 along its entire circumference in facing relation to the coil end 261.
  • the groove 31 serves as a recess of the present invention.
  • the groove 31 and the inlet port 17 are formed through the wall of the intermediate housing 12 so that the groove 31 directly communicates with the inlet port 17.
  • the width W1 of the groove 31 in the axial direction of the rotary shaft 23 is larger than the width W2 of the inlet port 17.
  • a rear end 311 of the groove 31 is positioned rearward of a rear end 171 of the inlet port 17, and a front end 312 of the groove 31 is positioned forward of a front end 172 of the inlet port 17.
  • the width W1 of the groove 31 is larger than the length L1 of the coil end 261.
  • the rear end 311 of the groove 31 is positioned rearward of a front end of the stator core 251, and the front end 312 of the groove 31 is positioned forward of a front end of the coil end 261.
  • the front end 312 of the groove 31 coincides with an inner end surface 123 of the intermediate housing 12.
  • the groove 31 thus extends beyond the coil end 261 in the axial direction of the rotary shaft 23 toward the inverter 30 so that part of the groove 31 does not face the coil end 261.
  • the groove 31 is formed by cutting the inner peripheral surface 122 with a depth H2 of about 1 to 2 mm that allows refrigerant gas to flow from the inlet port 17 smoothly and to spread toward the front end 312 and the rear end 311 of the groove 31.
  • the groove 31 is formed, for example, by rotating a side-milling cutter in the intermediate housing 12.
  • a flow space 32 defined between the inner end surface 123 of the intermediate housing 12 and the coil end 261 is formed in the intermediate housing 12.
  • the flow space 32 has a length L2 of about 3 mm as measured in the axial direction of the rotary shaft 23, allowing refrigerant gas to flow smoothly from the inlet port 17 into the flow space 32.
  • the flow space 32 faces the wall of the intermediate housing 12 of which the outer end surface 121 is in contact with the electronic components 302, and therefore the electronic components 302 are cooled via the wall by cool refrigerant gas flowing through the flow space 32.
  • the rotor 24 of the motor 19 is rotated with the rotary shaft 23 thereby to drive the compression mechanism 18.
  • the volume of the compression chamber 22 between the scrolls 20 and 21 is varied, and refrigerant gas is introduced from the evaporator E via the inlet port 17 and the groove 31 into the intermediate housing 12. Since the refrigerant gas flows from the inlet port 17 spreading toward the front end 312 and the rear end 311 of the groove 31, part of the refrigerant gas flows around the coil end 261 and into the flow space 32, while the rest of the refrigerant gas flows directly into the flow space 32.
  • the refrigerant gas then flows via an inlet passage 27 into the compression chamber 22 and compressed therein. After being compressed, the refrigerant gas is discharged via a discharge passage 28 into the discharge chamber 15 while pushing open a discharge valve 29, and flows out of the compressor 10. The refrigerant then flows through the condenser C, the expansion valve V and the evaporator E, flowing back into the intermediate housing 12.
  • the motor-driven compressor 10 offers the following advantages.
  • a groove 50 is formed on the inner peripheral surface 122 of the intermediate housing 12.
  • a rear end 501 of the groove 50 coincides with the rear end of the inlet port 171, and a front end 502 of the groove 51 is positioned forward of the front end 172 of the inlet port 17.
  • the width W3 of the groove 50 in the axial direction of the rotary shaft 23 is larger than the length L1 of the coil end 261.
  • the rear end 501 of the groove 50 is positioned forward of the front end of the stator core 251, and the front end 502 of the groove 50 is positioned forward of the front end of the coil end 261.
  • the front end 502 of the groove 50 coincides with the inner end surface 123 of the intermediate housing 12.
  • the groove 50 thus extends beyond the coil end 261 in the axial direction of the rotary shaft 23 toward the inverter 30 so that part of the groove 51 does not face the coil end 261.
  • the second embodiment offers the advantages similar to those of the first embodiment.
  • the above embodiments may be modified in various ways as exemplified below.
  • the groove 31 or 50 may be a hole shape partially formed at the inner peripheral surface 122 of the intermediate housing 12 so as to communicate with the inlet port 17.
  • the compression mechanism 18 is of a scroll type having the fixed and movable scrolls 20 and 21, but it may be of a piston type or a vane type.
  • a compressor includes a housing having an inlet port, a compression mechanism for compression of refrigerant introduced via the inlet port into the housing, a motor having a stator core and a coil, an inverter for driving the motor, and a rotary shaft rotated by the motor thereby to drive the compression mechanism.
  • the compression mechanism, the motor and the inverter are aligned in the order in the housing in axial direction of the rotary shaft.
  • the coil has a coil end projecting toward the inverter from the stator core and being disposed adjacent to an inner peripheral surface of the housing.
  • the inlet port is located so as to face the coil end.
  • a recess is formed on the inner peripheral surface of the housing for communicating with the inlet port. The recess extends in the axial direction of the rotary shaft toward the inverter beyond the coil end.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
EP08171828A 2007-12-18 2008-12-16 Motor-driven compressor Withdrawn EP2072821A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007326413A JP2009150234A (ja) 2007-12-18 2007-12-18 電動圧縮機

Publications (1)

Publication Number Publication Date
EP2072821A2 true EP2072821A2 (en) 2009-06-24

Family

ID=40460911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08171828A Withdrawn EP2072821A2 (en) 2007-12-18 2008-12-16 Motor-driven compressor

Country Status (4)

Country Link
US (1) US20090162222A1 (zh)
EP (1) EP2072821A2 (zh)
JP (1) JP2009150234A (zh)
CN (1) CN101463821B (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2679821A1 (en) * 2012-06-28 2014-01-01 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor
US8974197B2 (en) 2010-02-16 2015-03-10 Halla Visteon Climate Control Corporation Compact structure for an electric compressor

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5479139B2 (ja) * 2010-02-10 2014-04-23 三菱重工業株式会社 インバータ一体型電動圧縮機およびその組立方法
US8777591B2 (en) * 2010-02-16 2014-07-15 Heng Sheng Precision Tech. Co., Ltd. Electrically driven compressor system for vehicles
US8519578B2 (en) * 2010-12-01 2013-08-27 Hamilton Sundstrand Corporation Starter generator stator having housing with cooling channel
CN102562519A (zh) * 2010-12-24 2012-07-11 上海三电贝洱汽车空调有限公司 电动压缩机
JP5252006B2 (ja) 2011-03-08 2013-07-31 株式会社豊田自動織機 電動圧縮機
JP5267601B2 (ja) * 2011-03-08 2013-08-21 株式会社豊田自動織機 電動圧縮機
JP2012211531A (ja) * 2011-03-31 2012-11-01 Toyota Industries Corp 電動圧縮機
FR2975448B1 (fr) * 2011-05-19 2017-07-14 Valeo Thermal Systems Japan Corp Compresseur electrique modulaire avec dispositif de fixation integre
JP5697038B2 (ja) 2011-08-08 2015-04-08 サンデン株式会社 電動圧縮機の電気回路耐振構造
JP5413435B2 (ja) * 2011-10-31 2014-02-12 株式会社豊田自動織機 電動コンプレッサ
EP2873858B1 (en) * 2012-05-18 2020-08-12 Valeo Japan Co., Ltd. Electric compressor
JP2014070582A (ja) * 2012-09-28 2014-04-21 Toyota Industries Corp 電動圧縮機及び空調装置
JP6545527B2 (ja) * 2015-05-19 2019-07-17 サンデン・オートモーティブコンポーネント株式会社 電動圧縮機
JP6754252B2 (ja) * 2016-09-14 2020-09-09 サンデン・オートモーティブコンポーネント株式会社 インバータ一体型電動圧縮機及びその製造方法
JP2018204492A (ja) * 2017-06-01 2018-12-27 サンデン・オートモーティブコンポーネント株式会社 インバータ一体型電動圧縮機
DE102022120679A1 (de) * 2022-08-16 2024-02-22 Bitzer Kühlmaschinenbau Gmbh Scrollmaschine und Kälteanlage

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Publication number Priority date Publication date Assignee Title
JPH0480554A (ja) 1990-07-20 1992-03-13 Seiko Epson Corp 空気調和機用モータ一体型圧縮機
JP2000291557A (ja) 1999-04-07 2000-10-17 Sanden Corp 電動式圧縮機

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US4396361A (en) * 1979-01-31 1983-08-02 Carrier Corporation Separation of lubricating oil from refrigerant gas in a reciprocating compressor
JPS59224493A (ja) * 1983-06-03 1984-12-17 Mitsubishi Electric Corp スクロ−ル圧縮機
JPH09112474A (ja) * 1995-10-17 1997-05-02 Daikin Ind Ltd 冷媒圧縮機
US6386840B1 (en) * 2000-02-04 2002-05-14 Scroll Technologies Oil return for reduced height scroll compressor
JP2002070743A (ja) * 2000-08-29 2002-03-08 Sanden Corp 冷媒圧縮用電動式圧縮機
JP3976512B2 (ja) * 2000-09-29 2007-09-19 サンデン株式会社 冷媒圧縮用電動式圧縮機
JP2004183499A (ja) * 2002-11-29 2004-07-02 Denso Corp 電動コンプレッサ
JP4042634B2 (ja) * 2003-06-05 2008-02-06 株式会社デンソー 流体機械
US7342332B2 (en) * 2004-09-22 2008-03-11 Hamilton Sundstrand Corporation Air bearing and motor cooling
JP4493531B2 (ja) * 2005-03-25 2010-06-30 株式会社デンソー 膨張機付き流体ポンプおよびそれを用いたランキンサイクル

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0480554A (ja) 1990-07-20 1992-03-13 Seiko Epson Corp 空気調和機用モータ一体型圧縮機
JP2000291557A (ja) 1999-04-07 2000-10-17 Sanden Corp 電動式圧縮機

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8974197B2 (en) 2010-02-16 2015-03-10 Halla Visteon Climate Control Corporation Compact structure for an electric compressor
EP2679821A1 (en) * 2012-06-28 2014-01-01 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor
US9234527B2 (en) 2012-06-28 2016-01-12 Kabushiki Kaisha Toyota Jidoshokki Motor driven compressor

Also Published As

Publication number Publication date
CN101463821A (zh) 2009-06-24
JP2009150234A (ja) 2009-07-09
CN101463821B (zh) 2010-12-08
US20090162222A1 (en) 2009-06-25

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