US20090010786A1 - Electrically-Driven Compressor - Google Patents

Electrically-Driven Compressor Download PDF

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Publication number
US20090010786A1
US20090010786A1 US11/885,776 US88577607A US2009010786A1 US 20090010786 A1 US20090010786 A1 US 20090010786A1 US 88577607 A US88577607 A US 88577607A US 2009010786 A1 US2009010786 A1 US 2009010786A1
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US
United States
Prior art keywords
sealing member
electrically
housing
shape
driven 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.)
Abandoned
Application number
US11/885,776
Other languages
English (en)
Inventor
Tatsuya Koide
Ken Suitou
Kazuya Kimura
Akio Fujii
Akihiko Taketani
Masao Iguchi
Kenji Mochizuki
Shingo Enami
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
Assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI reassignment KABUSHIKI KAISHA TOYOTA JIDOSHOKKI ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ENAMI, SHINGO, FUJII, AKIO, IGUCHI, MASAO, KIMURA, KAZUYA, MOCHIZUKI, KENJI, SUITOU, KEN, TAKETANI, AKIHIKO, KOIDE, TATSUYA
Publication of US20090010786A1 publication Critical patent/US20090010786A1/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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • 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
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/001—Radial sealings for working fluid
    • F04C27/003—Radial sealings for working fluid of resilient material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
    • F16J15/022—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/061—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with positioning means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
    • F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
    • F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
    • F16J15/122—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally parallel to the surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
    • F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
    • F16J15/125—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally perpendicular to the surfaces
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • 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
    • F04C2240/30—Casings or housings
    • 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 an electrically-driven compressor including a compression mechanism driven by an electric motor, and more particularly, to an electrically-driven compressor in which a drive circuit for driving an electric motor is accommodated in an accommodation portion of a housing.
  • the cover member is attached so as to cover the inverter controller and protect the inverter controller from dust and moisture.
  • a seal member (sealing member) is arranged at the open end of the tubular wall. The pressure condition in the casing is ensured by arranging the seal member (sealing member) between the tubular wall and the circuit board.
  • a seal member is further arranged at an open end of the cover member. Dust and moisture are prevented from entering the cover member by arranging the seal member between the cover member and the circuit board.
  • a rubber O-ring is used as the seal member.
  • the seal member must be arranged along the entire circumference of the open end of the tubular wall and be in close contact with the open end of the tubular wall and the circuit board in order to ensure the pressure condition in the casing.
  • the additional seal member must be arranged along the entire circumference of the open end of the cover member and be in close contacted with the open end of the cover member and the circuit board to prevent dust and moisture from entering the cover member.
  • the shape of the seal member In order to arrange each seal member along the entire circumference of the corresponding open end, the shape of the seal member must be sustained to conform to the shape of the corresponding open end. Thus, a groove for sustaining the shape of the seal member must be formed at each open end in patent document 1.
  • a gasket may be used as the seal member. Since a gasket is formed from a metal plate, a means for sustaining the shape of the seal member is not required.
  • a gasket is held in close contact with the open end of the tubular wall and the circuit board to ensure the pressure conditions in the casing.
  • An additional gasket is held in close contact with the open end of the cover member and the circuit board to prevent dust and moisture from entering the cover member.
  • the inverter controller employs a structure in which electrical components connected to the circuit board come into contact with the cover member so as to radiate heat from the electrical components through the cover member. This improves the heat radiation of the heat generated by the electrical components.
  • a gasket has the shape of a thin plate.
  • the cover member must be accurately manufactured to equalize the gap between the open end of the cover member and the circuit board with the thickness of the gasket in order to close the gap so that the cover member comes into close contact with the gasket. If the cover member is manufactured with low accuracy, the adhesion of the open end of the cover member to the gasket decreases, and dust and moisture enters the cover member from the space between the cover member and the circuit board.
  • Patent Document 1 Japanese Laid-Open Patent Publication No. 2002-364536
  • one aspect of the present invention is an electrically-driven compressor including a housing, an electric motor accommodated in the housing, a compression mechanism accommodated in the housing and operated by the electric motor, and a cover member attached to the housing.
  • the housing and the cover member form an accommodation portion including an accommodation space therein.
  • a motor drive circuit is accommodated in the accommodation space for driving the electric motor.
  • a sealing member arranged between the housing and the cover member seals the accommodation space.
  • the sealing member includes an elastic seal portion that closely contacts the housing and the cover member and a shape sustaining member for sustaining the shape of the seal portion in conformance with a circumferential edge of the accommodation space.
  • the shape sustaining member is shaped so that at least a circumferential edge part of the shape sustaining member is in conformance with the circumferential edge of the accommodation space.
  • the seal portion is formed integrally with the circumferential edge part of the shape sustaining member by depositing rubber material thereon.
  • FIG. 1 is a longitudinal cross-sectional view showing an electrically-driven compressor according to a first embodiment
  • FIG. 2 is a side view showing the electrically-driven compressor of FIG. 1 ;
  • FIG. 3 is a cross-sectional view taken along line 3 - 3 of FIG. 2 showing a state in which an electric motor is removed;
  • FIG. 4 is a cross-sectional view showing an accommodation portion of a second embodiment
  • FIG. 5 is a partial cross-sectional view showing an accommodation portion of a third embodiment
  • FIG. 6 is a plan view showing the interior of an accommodation space
  • FIG. 7 is a partial cross-sectional view showing another example of the third embodiment.
  • FIG. 8 is a partial cross-sectional view showing a sealing member of another example of the third embodiment.
  • FIG. 9 is a partial cross-sectional view showing another example of the third embodiment.
  • FIG. 10 is a partial cross-sectional view showing a sealing member of another example
  • FIG. 11 is a partial cross-sectional view showing a sealing member of another example
  • FIG. 12 is a partial cross-sectional view showing a sealing member of another example
  • FIG. 13 is a partial cross-sectional view showing a sealing member of another example
  • FIG. 14 is a partial cross-sectional view showing a sealing member of another example.
  • FIG. 15 is a partial cross-sectional view showing a sealing member of another example.
  • FIGS. 1 to 3 A first embodiment of the present invention will now be described with reference to FIGS. 1 to 3 .
  • the “front” and “rear” of the compressor correspond to the directions of the arrow Y 1 shown in FIG. 1
  • the “left” and “right” correspond to the directions of the arrow Y 2 shown in FIG. 3 .
  • a housing 11 forming the outer shell of an electrically-driven compressor 10 includes a first housing element 21 and a second housing element 22 .
  • the second housing element 22 is joined and fixed to the rear end of the first housing element 21 .
  • the first housing element 21 which is formed by die casting aluminum alloy, has a bottom located at the front end of a substantially cylindrical circumferential wall 23 .
  • the second housing element 22 which is formed by die casting aluminum alloy, is cylindrical and has a lid located at the rear end.
  • a sealed space 24 is formed between the first housing element 21 and the second housing element 22 .
  • the first housing element 21 rotatably supports a rotation shaft 27 .
  • An electric motor 25 and a compression mechanism 26 are accommodated in the sealed space 24 .
  • the electric motor 25 includes a stator 25 a fixed to an inner surface 23 a of the circumferential wall 23 and a rotor 25 b arranged on the rotation shaft 27 at the radially inward side of the stator 25 a .
  • the electric motor 25 rotates the rotation shaft 27 when power is supplied to the stator 25 a.
  • the compression mechanism 26 is of a scroll type including a fixed scroll 26 a and a movable scroll 26 b .
  • the compression mechanism 26 compresses refrigerant gas when the movable scroll 26 b orbits relative to the fixed scroll 26 a as the rotation shaft 27 rotates.
  • refrigerant gas is drawn from an external refrigerant circuit (not shown) into the compression mechanism 26 through an intake port 28 (see FIG. 2 ) formed in the first housing element 21 through the electric motor 25 .
  • the refrigerant gas drawn into the compression mechanism 26 becomes high temperature and high pressure refrigerant gas due to the compression action of the compression mechanism 26 .
  • the refrigerant gas is discharged out of a discharge port 29 formed in the second housing element 22 into the external refrigerant circuit.
  • an accommodation portion 36 including an accommodation space 35 therein is formed in part of an outer surface 23 b of the circumferential wall 23 .
  • the accommodation portion 36 includes a side wall 37 , which has the shape of a four-sided frame and extends integrally from the outer surface 23 b of the circumferential wall 23 , and a cover member 38 , which is attached to an open end 37 a of the side wall 37 .
  • An accommodation cavity 23 c having a bottom defined by the outer surface 23 b of the circumferential wall 23 is formed at the inner side of the side wall 37 .
  • the cover member 38 is formed from aluminum alloy or the like and has the shape of a square box with a lid at the right end.
  • the cover member 38 includes a top plate portion 39 having the shape of a four-sided plate and a circumferential wall portion 40 projecting along the circumferential part of the top plate portion 39 .
  • An accommodation cavity 38 a is formed at the inner side of the top plate portion 39 and the circumferential wall portion 40 .
  • the cover member 38 is attached and fixed to the first housing element 21 with an open end 40 a of the circumferential wall portion 40 facing an open end 37 a of the side wall 37 .
  • the cover member 38 is attached to the first housing element 21 by fastening bolts 50 , which are inserted through the cover member 38 , with the first housing element 21 .
  • the accommodation space 35 is defined in the accommodation portion 36 by the accommodation cavity 23 c and the accommodation cavity 38 a . That is, the accommodation space 35 is formed by the outer surface 23 b of the circumferential wall 23 , the inner surface of the side wall 37 , the inner surface of the circumferential wall portion 40 , and the top surface of the top plate portion 39 , as shown in FIG. 3 .
  • a sealing member 30 for sealing the accommodation space 35 is arranged between the open end 37 a of the side wall 37 and the open end 40 a of the circumferential wall portion 40 , or along the circumferential edge of the accommodation space 35 .
  • a motor drive circuit 41 for driving the electric motor 25 is accommodated in the accommodation space 35 .
  • the motor drive circuit 41 which includes an inverter, supplies power to the stator 25 a of the electric motor 25 based on an external command from an air conditioner ECU (not shown).
  • the motor drive circuit 41 includes a planar circuit board 43 and plural types of electrical components 44 .
  • the electrical components 44 are respectively connected to the circuit board 43 on a surface 43 a facing the first housing element 21 and a surface 43 b facing the cover member 38 .
  • the circuit board 43 is fixed to the circumferential wall 23 of the first housing element 21 by the bolts 50 .
  • the electrical components 44 include known components forming the inverter (i.e., switching element, electrolytic capacitor, transformer, driver, fixed resistor, etc.).
  • the electrical components 44 arranged on the surface 43 a of the circuit board 43 contact the first housing element 21 by way of an insulating plate 45
  • the electrical components 44 arranged on the surface 43 b of the circuit board 43 contact the top plate portion 39 of the cover member 38 by way of an insulating plate 46 .
  • the insulating plates 45 and 46 are preferably formed from materials having superior heat conductivity.
  • the sealing member 30 has the shape of a generally four-sided frame and includes a core 31 and a seal portion 32 .
  • the core 31 serves as a shape sustaining member having the shape of a generally four-sided frame.
  • the core 31 is made of, for example, stainless steel, and has the required rigidity. Therefore, the core 31 sustains its shape with its rigidity and is not easily deformed by external force or the like.
  • the seal portion 32 is made of a rubber material (e.g., hydrogenated nitrile rubber (HNBR), oil bearing rubber, etc.) integrated with the core 31 . Materials having superior elasticity are suitable for use as the rubber material.
  • the sealing member 30 has an outline formed by the seal portion 32 , and the core 31 is embedded in the inner side of the seal portion 32 . That is, the seal portion 32 is integrated with the core 31 so as to include the outer circumferential part of the core 31 .
  • the sealing member 30 has a shape that conforms to the circumferential edge of the accommodation space 35 , that is, the shape of a generally four-sided frame conforming to the open end 37 a of the side wall 37 and the open end 40 a of the circumferential wall portion 40 .
  • the core 31 and the seal portion 32 also have the shape of a generally four-sided frame so as to conform to the shape of the two open ends 37 a and 40 a .
  • the width of each side of the four-sided frame forming the seal portion 32 is the same as the width of the corresponding side of the side wall 37 and the width of the side of the circumferential wall portion 40 .
  • the inner circumferential edge of the seal portion 32 , the inner circumferential edge of the side wall 37 , and the inner circumferential edge of the circumferential wall portion 40 lie along the same plane
  • the outer circumferential edge of the seal portion 32 , the outer circumferential edge of the side wall 37 , and the outer circumferential edge of the circumferential wall portion 40 lie along the same plane.
  • the sealing member 30 is manufactured in the following manner.
  • the core 31 is first shaped into a generally four-sided frame that conforms to the open end 37 a of the side wall 37 and the open end 40 a of the circumferential wall portion 40 .
  • Rubber material is then vapor-deposited on the core 31 , which has been shaped as a generally four-sided frame. This integrates the seal portion 32 with the core 31 and manufactures the sealing member 30 .
  • the cover member 38 is first arranged so that the open end 40 a faces the open end 37 a . Then, the sealing member 30 is arranged between the two open ends 37 a and 40 a . That is, the seal portion 32 of the sealing member 30 is arranged on the circumferential edge of the accommodation space 35 . The cover member 38 is then secured to the first housing element 21 with the bolts 50 , the sealing member 30 is held between the open ends 37 a and 40 a , and the seal portion 32 comes into close contact with the open ends 37 a and 40 a .
  • the sealing member 30 is shaped into a generally four-sided frame that conforms to the two open ends 37 a and 40 a , and the shape of the seal portion 32 is sustained to the generally four-sided frame shape by the core 31 .
  • a positioning means for shaping the sealing member 30 , particular, the seal portion 32 , in conformance with the two open ends 37 a and 40 a is not necessary.
  • the seal portion 32 When attaching the cover member 38 , the seal portion 32 is elastically deformed by the axial fastening force of the bolts 50 .
  • the top plate portion 39 of the cover member 38 contacts the electrical components 44 by way of the insulating plate 46 when the cover member 38 is attached to the first housing element 21 .
  • the open end 40 a is spaced from the open end 37 a , and a gap is formed between the two open ends 37 a and 40 a .
  • this gap is closed by the seal portion 32 arranged between the two open ends 37 a and 40 a , and the surfaces of the seal portion 32 respectively facing the open ends 37 a and 40 a come into close contact with the open ends 37 a and 40 a .
  • the seal portion 32 ensures the adhesion between the open end 37 a and the open end 40 a . Furthermore, the seal portion 32 elastically deforms in its thicknesswise direction due to the axial fastening force of the bolts 50 . The elastic deformation absorbs the dimensional tolerance of the two open ends 37 a and 40 a . This improves the adhesion of the side wall 37 and the cover member 38 .
  • the sealing member 30 is arranged between the open end 37 a and the open end 40 a at the circumferential edge of the accommodation space 35 .
  • the seal portion 32 seals the accommodation space 35 in close contact with the open ends 37 a and 40 a .
  • the sealing member 30 includes the core 31 , which has the shape of a generally four-sided frame and which is arranged along the circumferential direction of the open ends 37 a and 40 a , and the seal portion 32 , which is formed by vapor-depositing rubber material on the core 31 .
  • the seal portion 32 of the sealing member 30 is sustained in a generally four-sided frame shape conforming to the open ends 37 a and 40 a by the core 31 .
  • a means for sustaining the shape of the seal portion 32 as a four-sided frame shape (e.g., groove and adhesive for holding the seal portion 32 ) thus does not need to be arranged on the open ends 37 a and 40 a . Consequently, the manufacturing of the electrically-driven compressor 10 is facilitated.
  • the shape of the seal portion 32 is sustained by the core 31 . Therefore, the sealing member 30 is attached to the accommodation portion 36 just by arranging the sealing member 30 on the circumferential edge of the accommodation space 35 and holding it between the open end 37 a and the open end 40 a .
  • the formation of the accommodation portion 36 and furthermore, the assembly of the electrically-driven compressor 10 is facilitated compared to, for example, when an O-ring is fitted to the groove.
  • the seal portion 32 does not need to be joined to the open ends 37 a and 40 a with an adhesive or the like. Therefore, the cover member 38 and the sealing member 30 are easily disassembled when disassembling the accommodation portion 36 .
  • the cover member 38 When the cover member 38 is attached to the housing 11 , the electrical components 44 contact the cover member 38 , and a gap is formed between the open end 37 a of the housing 11 and the open end 40 a of the cover member 38 .
  • the gap between the housing 11 and the cover member 38 must correspond to the thickness of the gasket in the state of contact.
  • the gap is closes as the seal portion 32 elastically deforms.
  • the housing 11 (side wall 37 ) and the cover member 38 do not need to be accurately manufactured. Accordingly, the gap is closed without increasing costs as would be the result when accurately manufacturing the housing 11 and the cover member 38 .
  • the seal portion 32 Since the open end 37 a and the open end 40 a have the shape of a generally four-sided frame, the seal portion 32 also needs to be sustained in the generally four-sided frame shape.
  • a means (e.g., groove) for sustaining the seal portion 32 in a generally four-sided frame shape does not need to be arranged in the open ends 37 a and 40 a since the shape of the seal portion 32 is sustained by the core 31 in the present embodiment.
  • a shape sustaining means such as groove must always be formed on the open ends 37 a and 40 a . Accordingly, the structure for sustaining the seal portion 32 in a generally four-sided frame shape with the core 31 is particularly effective when the sealing regions have a polygonal (four-sided) frame shape.
  • Rubber material is vapor-deposited on the core 31 , which is shaped as a generally four-sided frame in advance to integrate the core 31 with the seal portion 32 and manufacture the sealing member 30 . Therefore, unnecessary material is not produced, whereas unnecessary material would be produced when manufacturing a gasket by depositing rubber material on a metal plate to form a rubber thin film and then punching the metal plate to a desired shape (generally four-sided frame shape in the present embodiment).
  • the sealing member 30 has rubber material deposited after the core 31 is shaped into a generally four-sided frame. Therefore, the shaping of the core 31 into a generally four-sided frame is easily performed, and the manufacturing of the sealing member 30 is facilitated.
  • FIG. 4 A second embodiment of the present invention will now be described with reference to FIG. 4 .
  • the same reference numerals are used for components that are the same as the first embodiment, and the redundant description of such components will either be omitted or simplified.
  • a sealing member 60 of the second embodiment is formed with the seal portion 32 integrated with a circumferential edge part of a circuit board 43 , which has the shape of a four-side plate, in the motor drive circuit 41 . That is, the circumferential edge part of the circuit board 43 is also used as the shape sustaining member for sustaining the seal portion 32 in the shape conforming to the open ends 37 a and 40 a.
  • the present embodiment has the following advantage in addition to the advantages similar to advantages (1) to (5) of the first embodiment.
  • the sealing member 60 is formed by integrating the seal portion 32 with the circuit board 43 of the motor drive circuit 41 .
  • the seal portion 32 may be arranged at the circumferential edge of the accommodation space 35 at the same time when arranging the motor drive circuit 41 in the accommodation space 35 .
  • the task for forming the accommodation portion 36 can be eliminated as compared to when the task for arranging the motor drive circuit 41 in the accommodation space 35 and the task for arranging the sealing member 30 are separately performed during the formation of the accommodation portion 36 . This facilitates the manufacturing of the electrically-driven compressor 10 .
  • FIGS. 5 and 6 A third embodiment of the present invention will now be described with reference to FIGS. 5 and 6 .
  • the same reference numerals are used for components that are the same as the first embodiment, and the redundant description of such components will either be omitted or simplified.
  • the accommodation portion 36 is arranged on the upper part of the circumferential wall 23 of the first housing element 21 in the third embodiment. That is, the accommodation portion 36 includes the side wall 37 of four-sided frame shape integrally extended from the outer surface 23 b (upper surface in FIG. 5 ) of the circumferential wall 23 , and a cover member 38 attached and fixed to the side wall 37 .
  • the sealing member 30 is arranged between the open end 37 a of the side wall 37 in the housing 11 and the open end 40 a of the circumferential wall portion 40 .
  • the sealing member 30 is formed to have a four-sided frame shape and arranged along the circumferential edge of the accommodation space 35 .
  • the sealing member 30 includes the core 31 , which serves as a shape sustaining member having the shape of a generally four-sided frame, and a seal portion 32 , which is made of a rubber material integrated with the core 31 .
  • the sealing member 30 has an outline formed by the seal portion 32 , and the core 31 is embedded in the inner side of the seal portion 32 .
  • An inner circumferential part 31 a of the core 31 extends from the inner circumference of the seal portion 32 towards the inner side of the sealing member 30 .
  • a groove portion 32 a is arranged on both upper and lower surfaces (outer surfaces) of the seal portion 32 , and the groove portions 32 a are arranged at positions located at the inner sides of the inner circumferential edge and the outer circumferential edge of the seal portion 32 .
  • the groove portions 32 a extend across the entire seal portions 3 in the circumferential direction.
  • the motor drive circuit 41 accommodated in the accommodation space 35 includes a base 42 , which is made of aluminum, and the circuit board 43 , which is fixed to the base 42 .
  • the circuit board 43 is arranged on the upper side of the base 42 .
  • the base 42 is formed to have the shape of four-sided plate.
  • a support portion 42 a is arranged on the upper surface of the base 42 .
  • the circuit board 43 is fixed to the base 42 by inserting a screw (not shown) through the circuit board 43 and fastening the screw to a screw attachment hole (not shown) of the support portion 42 a .
  • FIG. 6 is a plan view showing the interior of the accommodation portion 36 . In FIG.
  • a contact portion 42 b forming a positioning portion is defined by two sides forming each of two opposing diagonal corners. That is, the contact portion 42 b is arranged on the outer circumferential part 42 c of the base 42 and is extended to the upper side and the lower side of the base 42 .
  • the outer surface of each contact portion 42 b has a planar shape.
  • the motor drive circuit 41 is first accommodated on the inner side of the cover member 38 . Then, the cover member 38 and the motor drive circuit 41 are integrated with each other by bolts (not shown). The outer surface of the contact portion 42 b contacts the inner circumferential surface of the circumferential wall portion 40 in a state in which the motor drive circuit 41 is integrated with the cover member 38 . Furthermore, the sealing member 30 is arranged on the open end 37 a , and the cover member 38 is arranged on the sealing member 30 . The cover member 38 is attached to the first housing element 21 with the bolts 50 inserted through the cover member 38 and the motor drive circuit 41 (circuit board 43 and base 42 ). The sealing member 30 is held between the open ends 37 a and 40 a so that the seal portion 32 of the sealing member 30 closely contacts each of the open ends 37 a and 40 a.
  • the motor drive circuit 41 is prevented from moving in the lateral direction or the rotation direction in the accommodation space 35 since the motor drive circuit 41 is fastened to the cover member 38 with bolts.
  • the outer surfaces of the two contact portions 42 b of the base 42 contact the inner circumferential part 31 a of the core 31 facing the contact portions 42 b . That is, the two sides forming each of two opposing diagonal corners and the contact portions 42 b of the base 42 facing such two sides at the inner circumferential part 31 a of the core 31 are in contact at the inner circumferential part 31 a of the core 31 .
  • the groove portion 32 a of the seal portion 32 is arranged at a position facing the open end 37 a of the side wall 37 and the open end 40 a of the circumferential wall portion 40 by positioning the sealing member 30 .
  • the inner circumferential part 31 a of the core 31 in the sealing member 30 and the contact portion 42 b of the base 42 in the motor drive circuit 41 form the positioning portion for positioning the sealing member 30 between the side wall 37 (housing) and the cover member 38 .
  • the present embodiment has the following advantages in addition to the advantages similar to advantages (1) to (7) of the first embodiment.
  • the positioning of the sealing member 30 is performed using the contact portion 42 b formed on the motor drive circuit 41 .
  • the sealing member 30 is positioned with a simple structure of extending the contact portion 42 b to the base 42 of the motor drive circuit 41 . Therefore, the number of components is reduced compared to when extending a pin hole formation portion, which includes a pin hole, on the inner circumferential side of the sealing member 30 , forming a pin hole in the first housing element 21 , and positioning the sealing member 30 by press-fitting the pin into the pin hole.
  • the cost for forming the pin hole formation portion and the pin hole, the cost of the pins, and the cost required for press-fitting the pins are reduced.
  • the cost required for forming the accommodation portion 36 and furthermore, the cost required for manufacturing the electrically-driven compressor 10 is thus reduced.
  • the contact portion 42 b is formed along the two sides forming each of two corners in the outer circumferential part 42 c of the base 42 .
  • the two opposing corners at the inner circumferential part 31 a of the core 31 contact the contact portions 42 b at the sealing member 30 .
  • rotation and movement of the sealing member 30 is prevented without arranging the contact portion 42 b across the entire circumference of the base 42 .
  • the outer surface of the contact portion 42 b is formed to have a planar shape.
  • the sealing member 30 is positioned by contact between the contact portion 42 b , which has a planar shape, and the inner circumferential part 31 a of the core 31 . This facilitates the positioning task of the sealing member 30 .
  • the present embodiment may be modified as described below.
  • the contact portion 42 b may project from the entire circumference of the outer circumferential part 42 c of the base 42 . In this case, the entire circumference of the inner circumferential part 31 a of the core 31 contacts the contact portion 42 b . This positions the sealing member 30 .
  • the third embodiment may be modified as described below.
  • the core 31 is entirely covered by the seal portion 32 .
  • the inner circumferential part 32 c of the seal portion 32 is formed so as to project towards the accommodation space 35 from the inner circumferential edges of the side wall 37 and the circumferential wall portion 40 .
  • the motor drive circuit 41 is positioned in the accommodation space 35 at the same time as when the cover member 38 is fixed to the first housing element 21 with the bolts 50 . This prevents movement in the accommodation space 35 .
  • the sealing member 30 is positioned by contact of the inner circumferential part 32 c of the seal portion 32 with the outer circumferential part 43 d of the circuit board 43 positioned in the accommodation space 35 .
  • the entire circumference of the inner circumferential part 32 c of the seal portion 32 contacts the entire circumference of the outer circumferential part 43 d of the circuit board 43 .
  • the two opposing corners may contact the outer circumferential part 43 d of the circuit board 43 at positions facing the two corners.
  • the positioning portion is formed by the inner circumferential part 32 c of the seal portion 32 and the outer circumferential part 43 d (contact portion) of the circuit board 43 .
  • the inner circumferential part 31 a of the core 31 is formed so as to project towards the accommodation space 35 from the inner circumferential edge of the side wall 37 and the circumferential wall portion 40 .
  • the motor drive circuit 41 is positioned in the accommodation space 35 at the same time as when the cover member 38 is fixed to the first housing element 21 with the bolt 50 . This prevents movement in the accommodation space 35 .
  • the sealing member 30 is positioned by contact of the inner circumferential part 31 a of the core 31 with the outer circumferential part 43 d of the circuit board 43 positioned in the accommodation space 35 .
  • the entire circumference of the inner circumferential part 31 a of the core 31 contacts the entire circumference of the outer circumferential part 43 d of the circuit board 43 .
  • the two opposing corners may contact the outer circumferential part 43 d of the circuit board 43 at positions facing the two corners.
  • the positioning portion is formed by the inner circumferential part 31 a of the core 31 and the outer circumferential part 43 d (contact portion) of the circuit board 43 .
  • the sealing member 30 may be formed such that the core 31 is entirely covered by the seal portion 32 .
  • the inner circumferential part 32 c of the seal portion 32 is formed so as to project towards the accommodation space 35 from the inner circumferential edges of the side wall 37 and the circumferential wall portion 40 .
  • the motor drive circuit 41 is positioned in the accommodation space 35 at the same time as when the cover member 38 is fastened to the first housing element 21 with the bolts 50 . This prevents the motor drive circuit 41 from moving in the accommodation space 35 .
  • a projection 32 d is formed on each of two opposing corners. Each projection 32 d extends across the upper surface of the two sides forming the corresponding corner. Recesses 43 c engageable with the projections 32 d are formed on the lower surface of the outer circumferential part 43 d of the circuit board 43 .
  • the sealing member 30 is positioned by the engagement of the projections 32 d with the recesses 43 c . In this case, the positioning portion is formed by the projections 32 d and the recesses 43 c .
  • a projection 32 d may be formed to extend along the entire circumference of the upper surface of the seal portion 32
  • a recess 43 c may be formed to extend along the entire circumference of the lower surface of the circuit board 43 .
  • Such a structure prevents movement of the sealing member 30 by the contact between the outer surface of the projection 32 d and the inner surface of the recess 43 c.
  • the inner circumferential part 31 a of the core 31 may be projected towards the inner side of the sealing member 30 from the inner circumference of the seal portion 32 , and a projection may be formed on the upper surface of the inner circumferential part 31 a of the core 31 .
  • the recess engageable with the projection of the core 31 is formed on the lower surface of the outer circumferential part 43 d of the circuit board 43 .
  • the projection of the core 31 and the recess of the circuit board 43 form the positioning portion.
  • the third embodiment may be modified as described below.
  • engagement projections 37 b that engage the groove portions 32 a of the seal portion 32 are formed on the open end 37 a of the side wall 37
  • engagement projections 40 b that engage the groove portions 32 a of the seal portion 32 are formed on the open end 40 a of the circumferential wall portion 40 .
  • the sealing member 30 is positioned by the engagement of the groove portions 32 a and the engagement projections 37 b and 40 b . With such a structure, the movement of the sealing member 30 is prevented by contact of the outer surfaces of the engagement projections 37 b and 40 b with the inner surface of the groove portion 32 a .
  • the sealing member 30 may thus be positioned using a structure provided in advance on the sealing member 30 .
  • the engagement projection 37 b ( 40 b ) may be arranged only on two diagonal opposing corners.
  • the core 31 may be entirely covered by the seal portion 32 , and the inner circumferential part 32 c of the seal portion 32 may come into contact with the contact portion 42 b of the base 42 .
  • the positioning portion is formed by the inner circumferential part 32 c and the contact portion 42 b that contact each other.
  • the core 31 is entirely covered by the seal portion 32 , and the inner circumferential part 32 c of the seal portion 32 may come into contact with the contact portion 42 b of the base 42 .
  • the engagement projections 37 b that engage the groove portions 32 a of the seal portion 32 are formed on the open end 37 a of the side wall 37
  • the engagement projections 40 b that engage the groove portions 32 a of the seal portion 32 are formed on the open end 40 a of the circumferential wall portion 40 .
  • the sealing member 30 may be positioned by the engagement of the groove portions 32 a with the engagement projections 37 b and 40 b . That is, the sealing member 30 may be positioned by the contact portion 42 b arranged on the motor drive circuit 41 and the engagement projections 37 b and 40 b arranged in the accommodation portion 36 .
  • groove portions 32 a extending across the entire circumferential direction of the sealing member 30 may be formed on the surface of the seal portion 32 facing the corresponding open ends 37 a and 40 a .
  • the groove portions 32 a may not extend across the entire circumferential direction of the sealing member 30 .
  • the groove portions 32 a may be formed on only one part of the sealing member 30 in the circumferential direction.
  • a plurality of groove portions 32 a may be arranged on the sealing member 30 at equal or random intervals in the circumferential direction.
  • the core 31 may be entirely covered by the seal portion 32 in the sealing member 30 of the first embodiment.
  • rubber plates 63 made of a rubber material may be joined to the surfaces of the core 31 facing the corresponding open ends 37 a and 40 a in the sealing member 30 of the first embodiment so that each rubber plate 63 forms the seal portion.
  • the shape sustaining member may be formed by a pair of metal wires 70 forming a four-sided frame shape in the sealing member 30 of the first embodiment.
  • Rubber plates 71 made of a rubber material may be joined to the sides of the wires 70 facing the corresponding open ends 37 a and 40 a.
  • the seal portion may be formed by a rubber plate 73 having a four-sided frame shape, and an accommodation cavity 73 a may be formed in the surfaces of the rubber plate 73 facing the corresponding open ends 37 a and 40 a in the sealing member 30 of the first embodiment.
  • a core 74 serving as the shape sustaining member may be accommodated in each accommodation cavity 73 a.
  • the shape sustaining member may be formed by a pair of metal wires 70 forming a four-sided frame shape, and the wires 70 may be entirely coated with a rubber material and the seal portion 32 may be formed on the entire circumference of the wire 70 in the sealing member 30 of the first embodiment.
  • a contact strip may be extending upward from the inner circumferential surface of the side wall 37 , and the inner circumferential part 31 a of the core 31 of the sealing member 30 may come into contact with the contact strip in order to position the sealing member 30 .
  • the contact strip may be extended downward from the inner circumferential surface of the circumferential wall portion 40 of the cover member 38 , and the inner circumferential part 31 a of the core 31 of the sealing member 30 may come into contact with the contact strip in order to position the sealing member 30 .
  • the compression mechanism 26 is not limited to the scroll type, and may be, for example, a piston type, a vane type, a helical type, or the like.
  • the open end 37 a of the side wall 37 and the open end 40 a of the cover member 38 are not limited to the four-sided frame shape and may have any shape such as round frame shape, a three-sided frame shape, and the like. In this case, the shapes of the core 31 and the seal portion 32 are changed in accordance with the shapes of the open ends 37 a and 40 a.
  • the accommodation space 35 may be formed by only the accommodation cavity 38 a of the cover member 38 .
  • the side wall 37 (accommodation cavity 23 c ) is omitted.
  • the accommodation space 35 may be formed by only the accommodation cavity 23 c of the side wall 37 .
  • the circumferential wall portion 40 (accommodation cavity 38 a ) of the cover member 38 is omitted.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
US11/885,776 2006-01-25 2007-01-25 Electrically-Driven Compressor Abandoned US20090010786A1 (en)

Applications Claiming Priority (5)

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JP2006-016503 2006-01-25
JP2006016503 2006-01-25
JP2007-014411 2007-01-25
JP2007014411A JP5473192B2 (ja) 2006-01-25 2007-01-25 電動コンプレッサ
PCT/JP2007/051173 WO2007086463A1 (ja) 2006-01-25 2007-01-25 電動コンプレッサ

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US11/885,776 Abandoned US20090010786A1 (en) 2006-01-25 2007-01-25 Electrically-Driven Compressor
US14/703,130 Abandoned US20150233377A1 (en) 2006-01-25 2015-05-04 Electrically-driven compressor
US15/806,840 Active 2027-03-10 US10371147B2 (en) 2006-01-25 2017-11-08 Electrically-driven compressor

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US15/806,840 Active 2027-03-10 US10371147B2 (en) 2006-01-25 2017-11-08 Electrically-driven compressor

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US (3) US20090010786A1 (ja)
EP (1) EP1978253B1 (ja)
JP (1) JP5473192B2 (ja)
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US20180066659A1 (en) 2018-03-08
JP2007224902A (ja) 2007-09-06
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CN101321951B (zh) 2011-06-08
EP1978253B1 (en) 2014-09-10

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