US20140377096A1 - Motor-driven compressor - Google Patents
Motor-driven compressor Download PDFInfo
- Publication number
- US20140377096A1 US20140377096A1 US14/312,868 US201414312868A US2014377096A1 US 20140377096 A1 US20140377096 A1 US 20140377096A1 US 201414312868 A US201414312868 A US 201414312868A US 2014377096 A1 US2014377096 A1 US 2014377096A1
- Authority
- US
- United States
- Prior art keywords
- capacitor
- retainer
- motor
- driven compressor
- retaining pieces
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
Definitions
- the present invention relates to a motor-driven compressor that includes a compression unit, which compresses refrigerant, an electric motor, which drives the compression unit, and a motor driving circuit, which drives the electric motor.
- the motor-driven compressor includes a motor driving circuit, which includes a planer circuit board and a plurality of electric components of various types.
- the electric components which are electrically connected to the circuit board, include a switching element and a plurality of capacitors, for example.
- the capacitors are provided on the circuit board. Each capacitor is held by a capacitor holder.
- a motor-driven compressor including: a compression unit, an electric motor, a housing, a motor driving circuit, and a capacitor holder.
- the compression unit is adapted to compress refrigerant.
- the electric motor is adapted to drive the compression unit.
- the housing accommodates the compression unit and the electric motor.
- the motor driving circuit is adapted to drive the electric motor and includes a circuit board and a capacitor that is electrically connected to the circuit board.
- the capacitor holder is made of a plastic and holds the capacitor.
- the capacitor holder includes a side wall body, and a first retainer and a second retainer. The side wall body covers the side surfaces of the capacitor.
- the first retainer extends from the side wall body toward the circuit board and engages with a first end surface of the capacitor to hold the capacitor.
- the second retainer extends from the side wall body in the direction away from the circuit board and engages with a second end surface of the capacitor to hold the capacitor.
- the length of the second retainer in the extending direction of the second retainer is greater than the length of the first retainer in the extending direction of the first retainer.
- the second retainer is elastically deformed so that the capacitor holder accommodates the capacitor.
- FIG. 1 is a partial cross-sectional view showing a motor-driven compressor according to one embodiment
- FIG. 2 is an exploded perspective view showing a capacitor holder, in which film capacitors are held, a coupling base, and a circuit board;
- FIG. 3 is a longitudinal cross-sectional view showing the film capacitor and the capacitor holder
- FIG. 4 is a longitudinal cross-sectional view showing the state where the film capacitor is inserted into an accommodating chamber
- FIG. 5 is a perspective view showing film capacitors and a capacitor holder in another embodiment.
- FIGS. 1 to 4 one embodiment of the present invention will now be described.
- a motor-driven compressor 10 includes a housing H.
- the housing H includes a discharge housing member 11 , a suction housing member 12 , and a cover 13 , which are made of a metal, preferably aluminum.
- the discharge housing member 11 , the suction housing member 12 , and the cover 13 are cylindrical and each include a closed end.
- the suction housing member 12 is coupled to the discharge housing member 11 .
- the suction housing member 12 has a circumferential wall including a suction port (not shown) connected to an external refrigerant circuit (not shown).
- the discharge housing member 11 includes a discharge port 14 connected to the external refrigerant circuit.
- the suction housing member 12 accommodates a compression unit 15 (indicated by the broken lines in FIG.
- the compression unit 15 of the present embodiment includes a fixed scroll, which is fixed in the suction housing member 12 , and a movable scroll, which faces the fixed scroll.
- a stator 17 is fixed to the inner surface of the suction housing member 12 .
- the stator 17 includes a stator core 17 a , which is fixed to the inner surface of the suction housing member 12 , and coils 17 b , which are wound around teeth (not shown) of the stator core 17 a .
- a rotatable rotation shaft 19 extends through the stator 17 in the suction housing member 12 .
- a rotor 18 is fixed to the rotation shaft 19 .
- the suction housing member 12 has an end wall 12 a to which the cover 13 is coupled.
- a planer coupling base 31 is arranged between the suction housing member 12 and the cover 13 .
- the coupling base 31 is made of a metal, preferably aluminum.
- the coupling base 31 is coupled to the end wall 12 a of the suction housing member 12 .
- the coupling base 31 is thermally coupled to the suction housing member 12 .
- the coupling base 31 serves as a coupling member, which configures a part of the housing H.
- the cover 13 and the coupling base 31 define an accommodation chamber 13 a in the housing H.
- the accommodation chamber 13 a accommodates a motor driving circuit 20 that drives the electric motor 16 .
- the compression unit 15 , the electric motor 16 , and the motor driving circuit 20 are arranged in this order along the axis L of the rotation shaft 19 (in the axial direction).
- the electric motor 16 is supplied with power that is controlled by the motor driving circuit 20 . This rotates the rotor 18 and the rotation shaft 19 at a controlled rotation speed and drives the compression unit 15 .
- the driving of the compression unit 15 draws refrigerant from the external refrigerant circuit into the suction housing member 12 through the suction port, compresses the refrigerant in the suction housing member 12 with the compression unit 15 , and discharges the compressed refrigerant to the external refrigerant circuit through the discharge port 14 .
- the motor driving circuit 20 includes a flat circuit board 21 and a plurality of electric components of various types, which are electrically connected to the circuit board 21 .
- the circuit board 21 is arranged in the accommodation chamber 13 a such that a mounting surface 21 a of the circuit board 21 on which the electric components are arranged is perpendicular to the axis of the rotation shaft 19 .
- the electric components include film capacitors 22 , for example.
- the motor driving circuit 20 includes a plurality of film capacitors 22 . Each film capacitor 22 includes leads 22 a . The leads 22 a electrically connect the film capacitor 22 to the circuit board 21 .
- a plastic capacitor holder 23 holds the film capacitors 22 .
- the capacitor holder 23 which holds the film capacitors 22 , is coupled to the side of the coupling base 31 that is opposite to the end wall 12 a of the suction housing member 12 .
- a plurality of bosses 31 f projects from the surface of the coupling base 31 that is opposite to the end wall 12 a of the suction housing member 12 .
- Bolts B1 are inserted through the cover 13 and engaged with the corresponding bosses 31 f to fasten the coupling base 31 to the cover 13 . Accordingly, the cover 13 , the coupling base 31 , and the motor driving circuit 20 are combined to form a module.
- a bolt B2 fastens the cover 13 , which is combined with the coupling base 31 and the motor driving circuit 20 , to the suction housing member 12 .
- the capacitor holder 23 includes a side wall body 23 a , which covers the side surfaces of each film capacitor 22 .
- the side wall body 23 a includes hollowed polygonal shapes each configured by side walls and face the four sides of the corresponding film capacitor 22 .
- the side wall 231 a which is positioned to face one of the four sides of each film capacitor 22 , includes through-holes 23 h , each of which guides a lead 22 a of the corresponding film capacitor 22 to the portion of the circuit board 21 to which the lead 22 a is to be coupled.
- the side walls 232 a and 233 a face each other and are integrally formed with the side wall 231 a that includes the through-holes 23 h .
- Each of the side walls 232 a and 233 a includes a first retaining piece 41 , which serves as a first retainer, and second retaining pieces 42 , which serves as a second retainer.
- the first retaining pieces 41 extend from each side wall body 23 a toward the circuit board 21 .
- the first retaining pieces 41 engage with the first end surface 221 of the corresponding film capacitor 22 to hold the film capacitor 22 .
- the second retaining pieces 42 extend from each side wall body 23 a in a direction away from the circuit board 21 .
- the second retaining pieces 42 engage with the second end surface 222 of the corresponding film capacitor 22 to hold the film capacitor 22 .
- the length L2 of the second retaining pieces 42 in the extending direction of the second retaining pieces 42 is greater than the length L1 of the first retaining pieces 41 in the extending direction of the first retaining pieces 41 .
- the second retaining pieces 42 can be elastically deformed.
- each of the side walls 232 a and 233 a which face each other, includes one of the first retaining pieces 41 and two of the second retaining pieces 42 .
- the first retaining piece 41 is positioned between the two second retaining pieces 42 in each of the side walls 232 a and 233 a .
- the width H1 of the first retaining pieces 41 is greater than the width H2 of the second retaining pieces 42 .
- each first retaining piece 41 protrudes in perpendicularly from the side wall body 23 a of the capacitor holder 23 .
- Each second retaining piece 42 protrudes perpendicularly from the side wall body 23 a of the capacitor holder 23 .
- the tip end 42 e of the second retaining piece 42 is shaped as a hook.
- the coupling base 31 includes recesses 51 , which serve as engaging portions, in the surface facing the film capacitors 22 .
- the recesses 51 are engaged with the corresponding second retaining pieces 42 and limit the amount of the elastic deformation of the second retaining pieces 42 .
- the second retaining pieces 42 are pressed against the corresponding film capacitor 22 and elastically deformed. This facilitates the insertion of each film capacitor 22 into the capacitor holder 23 .
- each film capacitor 22 is accommodated in the capacitor holder 23 , the first retaining pieces 41 engage with the first end surface 221 of the corresponding film capacitor 22 to hold the film capacitor 22 . Further, as the second retaining pieces 42 return to their original positions, the tip ends 42 e of the second retaining pieces 42 engage with the second end surface 222 of the corresponding film capacitor 22 to hold the film capacitor 22 . Thereby, each film capacitor 22 is held by the capacitor holder 23 in the state where the film capacitor 22 is held between the first retaining pieces 41 and the second retaining pieces 42 . This improves the resistance of the film capacitor 22 against vibration via the capacitor holder 23 . Accordingly, even if each film capacitor 22 vibrates during the running of the vehicle, the film capacitor 22 is restricted from escaping from the capacitor holder 23 .
- the capacitor holder 23 includes the first retaining pieces 41 and the second retaining pieces 42 .
- the first retaining pieces 41 extend from each side wall body 23 a toward the circuit board 21 .
- the first retaining pieces 41 engage with the first end surface 221 of the corresponding film capacitor 22 to hold the film capacitor 22 .
- the second retaining pieces 42 extend from each side wall body 23 a in a direction away from the circuit board 21 .
- the second retaining pieces 42 engage with the second end surface 222 of the corresponding film capacitor 22 to hold the film capacitor 22 .
- the length L2 of the second retaining pieces 42 in the extending direction of the second retaining pieces 42 is greater than the length L1 of the first retaining pieces 41 in the extending direction of the first retaining pieces 41 .
- the second retaining pieces 42 are elastically deformed so that the corresponding film capacitor 22 is accommodated in the capacitor holder 23 . This facilitates the insertion of the film capacitors 22 into the capacitor holder 23 when inserting the film capacitors 22 into the capacitor holder 23 since the second retaining pieces 42 are pressed and elastically deformed by the corresponding film capacitor 22 .
- each film capacitor 22 is accommodated in the capacitor holder 23 , the first retaining pieces 41 engage with the first end surface 221 of the corresponding film capacitor 22 to hold the film capacitor 22 . Further, as the second retaining pieces 42 return to their original positions, the second retaining pieces 42 engage with the second end surface 222 of the corresponding film capacitor 22 to hold the film capacitor 22 . Accordingly, each film capacitor 22 is held by the capacitor holder 23 in the state where the film capacitor 22 is held between the first retaining pieces 41 and the second retaining pieces 42 . This improves the resistance of the film capacitor 22 against vibration via the capacitor holder 23 .
- a plurality of the second retaining pieces 42 are provided on each film capacitor 22 .
- Each first retaining piece 41 is located between adjacent two of the second retaining pieces 42 in each of the side walls 232 a and 233 a .
- the width H1 of the first retaining pieces 41 is greater than the width H2 of the second retaining pieces 42 . According to this, since a plurality of the second retaining pieces is provided on each film capacitor 22 , the holding force for holding the film capacitor 22 is improved in comparison to the case where only a single second retaining piece 42 is provided on each film capacitor 22 .
- the length L1 of the first retaining pieces 41 in the extending direction of the first retaining pieces 41 is less than the length L2 of the second retaining pieces 42 in the extending direction of the second retaining pieces 42 , and the width H1 of the first retaining pieces 41 is greater than the width H2 of the second retaining pieces 42 . Accordingly, the first retaining pieces 41 are less easily elastically deformed than the second retaining pieces 42 . Thus, when the film capacitors 22 are inserted through the second retaining pieces 42 into the capacitor holder 23 , the first retaining pieces 41 are less easily elastically deformed. Therefore, each film capacitor 22 is restricted from being pushed to the first retaining pieces 41 . This allows the first end surface 221 of the film capacitor 22 to be reliably engaged with the first retaining pieces 41 .
- Each side wall body 23 a of the capacitor holder 23 includes the through-holes 23 h , which guide the leads 22 a to the portions of the circuit board 21 to which the leads 22 a are to be connected. According to this, when inserting the film capacitors 22 through the second retaining pieces 42 into the capacitor holder 23 , the through-holes 23 h guide the leads 22 a to the portions of the circuit board 21 to which the leads 22 a are to be connected. This facilitates the connection operation between the leads 22 a and the circuit board 21 .
- the through-holes 23 h are formed in the side wall 231 a of the capacitor holder 23 positioned to face one of the four sides of each film capacitor 22 .
- the side walls 232 a and 233 a face each other and are integrally formed with the side wall 231 a including the through-holes 23 h .
- Each of the side walls 232 a and 233 a includes the first retaining piece 41 and the second retaining pieces 42 .
- the through-holes 23 h are formed in a side wall different from those of which the first retaining pieces 41 and the second retaining pieces 42 are provided.
- the recesses 51 are engaged with the corresponding second retaining pieces 42 , and limit the amount of the elastic deformation of the second retaining pieces 42 . According to this, the amount of the elastic deformation of the second retaining pieces 42 is limited by the recesses 51 so that the holding force of the capacitor holder 23 for holding the film capacitors 22 is further improved.
- the second retaining pieces 42 Since the second retaining pieces 42 are elastically deformed, the second retaining pieces 42 include the rigidity less than that of the first retaining pieces 41 . Therefore, the holding force of the second retaining pieces 42 for holding the film capacitors 22 is less than the holding force of the first retaining pieces 41 for holding the film capacitors 22 . Accordingly, in the present embodiment, the four second retaining pieces 42 are provided for each film capacitor 22 . This increases the number of the portions in the second end surface 222 of the film capacitor 22 by which the film capacitor 22 is held. Accordingly, the holding force for holding the film capacitor 22 is ensured.
- first retaining pieces 41 may be provided on each of the side walls 232 a and 233 a , which face each other.
- the number of the first retaining pieces 41 and the second retaining pieces 42 is not limited.
- first retaining pieces 41 and the second retaining pieces 42 may be provided on each of the side walls 232 a and 233 a , which face each other.
- the first retaining pieces 41 and the second retaining pieces 42 may be formed on the side wall 231 a , which includes the through-holes 23 h .
- the first retaining pieces 41 or the second retaining pieces 42 may be formed on the side wall 231 a , which includes the through-holes 23 h.
- the coupling base 31 may include protrusions such that the protrusions engage with the second retaining pieces 42 to limit the amount of the elastic deformation of the second retaining pieces 42 .
- the protrusions serve as engaging portions.
- the width H1 of the first retaining pieces 41 may be the same as the width H2 of the second retaining pieces 42 .
- the width H1 of the first retaining pieces 41 may be less than the width H2 of the second retaining pieces 42 .
- the coupling base 31 may be omitted.
- the capacitor holder 23 may be coupled to the end wall 12 a of the suction housing member 12 .
- the end wall 12 a of the suction housing member 12 serves as a coupling member to which the capacitor holder 23 is coupled.
- the recesses 51 may be formed in the surface of the end wall 12 a facing the capacitor holder 23 .
- the number of the film capacitor 22 is not particularly limited. That is, the number may be appropriately changed.
- the capacitors may include an electrolytic capacitor, for example.
- the motor driving circuit 20 may be located radially outward of the rotation shaft 19 , for example.
- the compression unit 15 may be of a piston type or a vane type, for example.
- the motor-driven compressor 10 may be used for any air conditioning device other than that installed in a vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Compressor (AREA)
Abstract
A motor-driven compressor includes a motor driving circuit, which includes a capacitor electrically connected to a circuit board, and a capacitor holder, which holds the capacitor. The capacitor holder includes a side wall body, which covers a side surface of the capacitor, a first retainer, which extends from the side wall body to the circuit board and engages with a first end surface of the capacitor, and a second retainer, which extends from the side wall body in a direction away from the circuit board and holds the second end surface of the capacitor. The length of the second retainer in the extending direction of the second retainer is greater than the length of the first retainer in the extending direction of the first retainer.
Description
- The present invention relates to a motor-driven compressor that includes a compression unit, which compresses refrigerant, an electric motor, which drives the compression unit, and a motor driving circuit, which drives the electric motor.
- Japanese Laid-Open Patent Publication No. 2007-263061 describes an example of such a motor-driven compressor. The motor-driven compressor includes a motor driving circuit, which includes a planer circuit board and a plurality of electric components of various types. The electric components, which are electrically connected to the circuit board, include a switching element and a plurality of capacitors, for example. The capacitors are provided on the circuit board. Each capacitor is held by a capacitor holder.
- In such a motor-driven compressor, it is desired to improve resistance of the capacitors against vibration applied via the capacitor holder so that the capacitors are restricted from escaping from the capacitor holder.
- Accordingly, it is an objective of the present invention to provide a motor-driven compressor that can improve resistance of a capacitor against vibration via a capacitor holder.
- To achieve the foregoing object, a motor-driven compressor including: a compression unit, an electric motor, a housing, a motor driving circuit, and a capacitor holder is provided. The compression unit is adapted to compress refrigerant. The electric motor is adapted to drive the compression unit. The housing accommodates the compression unit and the electric motor. The motor driving circuit is adapted to drive the electric motor and includes a circuit board and a capacitor that is electrically connected to the circuit board. The capacitor holder is made of a plastic and holds the capacitor. The capacitor holder includes a side wall body, and a first retainer and a second retainer. The side wall body covers the side surfaces of the capacitor. The first retainer extends from the side wall body toward the circuit board and engages with a first end surface of the capacitor to hold the capacitor. The second retainer extends from the side wall body in the direction away from the circuit board and engages with a second end surface of the capacitor to hold the capacitor. The length of the second retainer in the extending direction of the second retainer is greater than the length of the first retainer in the extending direction of the first retainer. The second retainer is elastically deformed so that the capacitor holder accommodates the capacitor.
- Other aspects and advantages of the present invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.
- The invention, together with objects and advantages thereof, may best be understood by reference to the following description of the presently preferred embodiments together with the accompanying drawings in which:
-
FIG. 1 is a partial cross-sectional view showing a motor-driven compressor according to one embodiment; -
FIG. 2 is an exploded perspective view showing a capacitor holder, in which film capacitors are held, a coupling base, and a circuit board; -
FIG. 3 is a longitudinal cross-sectional view showing the film capacitor and the capacitor holder; -
FIG. 4 is a longitudinal cross-sectional view showing the state where the film capacitor is inserted into an accommodating chamber; and -
FIG. 5 is a perspective view showing film capacitors and a capacitor holder in another embodiment. - Referring to
FIGS. 1 to 4 , one embodiment of the present invention will now be described. - As shown in
FIG. 1 , a motor-drivencompressor 10 includes a housing H. The housing H includes adischarge housing member 11, asuction housing member 12, and acover 13, which are made of a metal, preferably aluminum. Thedischarge housing member 11, thesuction housing member 12, and thecover 13 are cylindrical and each include a closed end. Thesuction housing member 12 is coupled to thedischarge housing member 11. Thesuction housing member 12 has a circumferential wall including a suction port (not shown) connected to an external refrigerant circuit (not shown). Thedischarge housing member 11 includes adischarge port 14 connected to the external refrigerant circuit. Thesuction housing member 12 accommodates a compression unit 15 (indicated by the broken lines inFIG. 1 ), which compresses refrigerant, and anelectric motor 16, which drives thecompression unit 15. Although not shown in the drawings, thecompression unit 15 of the present embodiment includes a fixed scroll, which is fixed in thesuction housing member 12, and a movable scroll, which faces the fixed scroll. - A stator 17 is fixed to the inner surface of the
suction housing member 12. The stator 17 includes astator core 17 a, which is fixed to the inner surface of thesuction housing member 12, andcoils 17 b, which are wound around teeth (not shown) of thestator core 17 a. Arotatable rotation shaft 19 extends through the stator 17 in thesuction housing member 12. Arotor 18 is fixed to therotation shaft 19. - The
suction housing member 12 has anend wall 12 a to which thecover 13 is coupled. Aplaner coupling base 31 is arranged between thesuction housing member 12 and thecover 13. Thecoupling base 31 is made of a metal, preferably aluminum. Thecoupling base 31 is coupled to theend wall 12 a of thesuction housing member 12. Thecoupling base 31 is thermally coupled to thesuction housing member 12. Thecoupling base 31 serves as a coupling member, which configures a part of the housing H. - The
cover 13 and thecoupling base 31 define an accommodation chamber 13 a in the housing H. The accommodation chamber 13 a accommodates amotor driving circuit 20 that drives theelectric motor 16. In the present embodiment, thecompression unit 15, theelectric motor 16, and themotor driving circuit 20 are arranged in this order along the axis L of the rotation shaft 19 (in the axial direction). - The
electric motor 16 is supplied with power that is controlled by themotor driving circuit 20. This rotates therotor 18 and therotation shaft 19 at a controlled rotation speed and drives thecompression unit 15. The driving of thecompression unit 15 draws refrigerant from the external refrigerant circuit into thesuction housing member 12 through the suction port, compresses the refrigerant in thesuction housing member 12 with thecompression unit 15, and discharges the compressed refrigerant to the external refrigerant circuit through thedischarge port 14. - The
motor driving circuit 20 includes aflat circuit board 21 and a plurality of electric components of various types, which are electrically connected to thecircuit board 21. Thecircuit board 21 is arranged in the accommodation chamber 13 a such that a mounting surface 21 a of thecircuit board 21 on which the electric components are arranged is perpendicular to the axis of therotation shaft 19. The electric components includefilm capacitors 22, for example. Themotor driving circuit 20 includes a plurality offilm capacitors 22. Eachfilm capacitor 22 includes leads 22 a. The leads 22 a electrically connect thefilm capacitor 22 to thecircuit board 21. - A
plastic capacitor holder 23 holds thefilm capacitors 22. Thecapacitor holder 23, which holds thefilm capacitors 22, is coupled to the side of thecoupling base 31 that is opposite to theend wall 12 a of thesuction housing member 12. - A plurality of bosses 31 f (only one shown in
FIG. 1 ) projects from the surface of thecoupling base 31 that is opposite to theend wall 12 a of thesuction housing member 12. Bolts B1 are inserted through thecover 13 and engaged with the corresponding bosses 31 f to fasten thecoupling base 31 to thecover 13. Accordingly, thecover 13, thecoupling base 31, and themotor driving circuit 20 are combined to form a module. A bolt B2 fastens thecover 13, which is combined with thecoupling base 31 and themotor driving circuit 20, to thesuction housing member 12. - As shown in
FIG. 2 , thecapacitor holder 23 includes aside wall body 23 a, which covers the side surfaces of eachfilm capacitor 22. Theside wall body 23 a includes hollowed polygonal shapes each configured by side walls and face the four sides of thecorresponding film capacitor 22. Theside wall 231 a, which is positioned to face one of the four sides of eachfilm capacitor 22, includes through-holes 23 h, each of which guides a lead 22 a of thecorresponding film capacitor 22 to the portion of thecircuit board 21 to which thelead 22 a is to be coupled. Theside walls side wall 231 a that includes the through-holes 23 h. Each of theside walls first retaining piece 41, which serves as a first retainer, and second retainingpieces 42, which serves as a second retainer. - The
first retaining pieces 41 extend from eachside wall body 23 a toward thecircuit board 21. Thefirst retaining pieces 41 engage with thefirst end surface 221 of thecorresponding film capacitor 22 to hold thefilm capacitor 22. Thesecond retaining pieces 42 extend from eachside wall body 23 a in a direction away from thecircuit board 21. Thesecond retaining pieces 42 engage with thesecond end surface 222 of thecorresponding film capacitor 22 to hold thefilm capacitor 22. The length L2 of thesecond retaining pieces 42 in the extending direction of thesecond retaining pieces 42 is greater than the length L1 of thefirst retaining pieces 41 in the extending direction of thefirst retaining pieces 41. Thesecond retaining pieces 42 can be elastically deformed. - According to the present embodiment, two
first retaining pieces 41 and foursecond retaining pieces 42 are provided for eachfilm capacitor 22. Specifically, each of theside walls first retaining pieces 41 and two of thesecond retaining pieces 42. Further, thefirst retaining piece 41 is positioned between the twosecond retaining pieces 42 in each of theside walls first retaining pieces 41 is greater than the width H2 of thesecond retaining pieces 42. - As shown in
FIG. 3 , each first retainingpiece 41 protrudes in perpendicularly from theside wall body 23 a of thecapacitor holder 23. Eachsecond retaining piece 42 protrudes perpendicularly from theside wall body 23 a of thecapacitor holder 23. Thetip end 42 e of thesecond retaining piece 42 is shaped as a hook. - As shown in
FIG. 2 , thecoupling base 31 includesrecesses 51, which serve as engaging portions, in the surface facing thefilm capacitors 22. Therecesses 51 are engaged with the corresponding second retainingpieces 42 and limit the amount of the elastic deformation of thesecond retaining pieces 42. - The operation of the present embodiment will now be described.
- As shown in
FIG. 4 , when inserting eachfilm capacitor 22 into thecapacitor holder 23, thesecond retaining pieces 42 are pressed against thecorresponding film capacitor 22 and elastically deformed. This facilitates the insertion of eachfilm capacitor 22 into thecapacitor holder 23. - As each
film capacitor 22 is accommodated in thecapacitor holder 23, thefirst retaining pieces 41 engage with thefirst end surface 221 of thecorresponding film capacitor 22 to hold thefilm capacitor 22. Further, as thesecond retaining pieces 42 return to their original positions, the tip ends 42 e of thesecond retaining pieces 42 engage with thesecond end surface 222 of thecorresponding film capacitor 22 to hold thefilm capacitor 22. Thereby, eachfilm capacitor 22 is held by thecapacitor holder 23 in the state where thefilm capacitor 22 is held between thefirst retaining pieces 41 and thesecond retaining pieces 42. This improves the resistance of thefilm capacitor 22 against vibration via thecapacitor holder 23. Accordingly, even if eachfilm capacitor 22 vibrates during the running of the vehicle, thefilm capacitor 22 is restricted from escaping from thecapacitor holder 23. - When each
film capacitor 22 is inserted through thesecond retaining pieces 42 into thecapacitor holder 23, theleads 22 a are guided by the corresponding through-holes 23 h to the portions of thecircuit board 21 to which the leads 22 a are to be connected. This facilitates the connection operation between theleads 22 a and thecircuit board 21. - The advantages of the present embodiment will now be described.
- (1) The
capacitor holder 23 includes thefirst retaining pieces 41 and thesecond retaining pieces 42. Thefirst retaining pieces 41 extend from eachside wall body 23 a toward thecircuit board 21. Thefirst retaining pieces 41 engage with thefirst end surface 221 of thecorresponding film capacitor 22 to hold thefilm capacitor 22. Thesecond retaining pieces 42 extend from eachside wall body 23 a in a direction away from thecircuit board 21. Thesecond retaining pieces 42 engage with thesecond end surface 222 of thecorresponding film capacitor 22 to hold thefilm capacitor 22. The length L2 of thesecond retaining pieces 42 in the extending direction of thesecond retaining pieces 42 is greater than the length L1 of thefirst retaining pieces 41 in the extending direction of thefirst retaining pieces 41. - The
second retaining pieces 42 are elastically deformed so that thecorresponding film capacitor 22 is accommodated in thecapacitor holder 23. This facilitates the insertion of thefilm capacitors 22 into thecapacitor holder 23 when inserting thefilm capacitors 22 into thecapacitor holder 23 since thesecond retaining pieces 42 are pressed and elastically deformed by thecorresponding film capacitor 22. - As each
film capacitor 22 is accommodated in thecapacitor holder 23, thefirst retaining pieces 41 engage with thefirst end surface 221 of thecorresponding film capacitor 22 to hold thefilm capacitor 22. Further, as thesecond retaining pieces 42 return to their original positions, thesecond retaining pieces 42 engage with thesecond end surface 222 of thecorresponding film capacitor 22 to hold thefilm capacitor 22. Accordingly, eachfilm capacitor 22 is held by thecapacitor holder 23 in the state where thefilm capacitor 22 is held between thefirst retaining pieces 41 and thesecond retaining pieces 42. This improves the resistance of thefilm capacitor 22 against vibration via thecapacitor holder 23. - (2) A plurality of the
second retaining pieces 42 are provided on eachfilm capacitor 22. Eachfirst retaining piece 41 is located between adjacent two of thesecond retaining pieces 42 in each of theside walls first retaining pieces 41 is greater than the width H2 of thesecond retaining pieces 42. According to this, since a plurality of the second retaining pieces is provided on eachfilm capacitor 22, the holding force for holding thefilm capacitor 22 is improved in comparison to the case where only a singlesecond retaining piece 42 is provided on eachfilm capacitor 22. - Further, the length L1 of the
first retaining pieces 41 in the extending direction of thefirst retaining pieces 41 is less than the length L2 of thesecond retaining pieces 42 in the extending direction of thesecond retaining pieces 42, and the width H1 of thefirst retaining pieces 41 is greater than the width H2 of thesecond retaining pieces 42. Accordingly, thefirst retaining pieces 41 are less easily elastically deformed than thesecond retaining pieces 42. Thus, when thefilm capacitors 22 are inserted through thesecond retaining pieces 42 into thecapacitor holder 23, thefirst retaining pieces 41 are less easily elastically deformed. Therefore, eachfilm capacitor 22 is restricted from being pushed to thefirst retaining pieces 41. This allows thefirst end surface 221 of thefilm capacitor 22 to be reliably engaged with thefirst retaining pieces 41. - (3) Each
side wall body 23 a of thecapacitor holder 23 includes the through-holes 23 h, which guide theleads 22 a to the portions of thecircuit board 21 to which the leads 22 a are to be connected. According to this, when inserting thefilm capacitors 22 through thesecond retaining pieces 42 into thecapacitor holder 23, the through-holes 23 h guide theleads 22 a to the portions of thecircuit board 21 to which the leads 22 a are to be connected. This facilitates the connection operation between theleads 22 a and thecircuit board 21. - (4) The through-
holes 23 h are formed in theside wall 231 a of thecapacitor holder 23 positioned to face one of the four sides of eachfilm capacitor 22. Theside walls side wall 231 a including the through-holes 23 h. Each of theside walls first retaining piece 41 and thesecond retaining pieces 42. According to this, the through-holes 23 h are formed in a side wall different from those of which thefirst retaining pieces 41 and thesecond retaining pieces 42 are provided. This facilitates the insertion of thefilm capacitors 22 into thecapacitor holder 23 in comparison to the case where the through-holes 23 h, and thefirst retaining pieces 41 and thesecond retaining pieces 42 are formed in a single side wall. Since the singlefirst retaining piece 41 and the twosecond retaining pieces 42 are provided on theside walls corresponding film capacitor 22 is further improved. - (5) The
recesses 51 are engaged with the corresponding second retainingpieces 42, and limit the amount of the elastic deformation of thesecond retaining pieces 42. According to this, the amount of the elastic deformation of thesecond retaining pieces 42 is limited by therecesses 51 so that the holding force of thecapacitor holder 23 for holding thefilm capacitors 22 is further improved. - (6) Since the
second retaining pieces 42 are elastically deformed, thesecond retaining pieces 42 include the rigidity less than that of thefirst retaining pieces 41. Therefore, the holding force of thesecond retaining pieces 42 for holding thefilm capacitors 22 is less than the holding force of thefirst retaining pieces 41 for holding thefilm capacitors 22. Accordingly, in the present embodiment, the foursecond retaining pieces 42 are provided for eachfilm capacitor 22. This increases the number of the portions in thesecond end surface 222 of thefilm capacitor 22 by which thefilm capacitor 22 is held. Accordingly, the holding force for holding thefilm capacitor 22 is ensured. - The above described embodiment may be modified as follows.
- As shown in
FIG. 5 , twofirst retaining pieces 41 may be provided on each of theside walls first retaining pieces 41 and thesecond retaining pieces 42 is not limited. - In the embodiment, it is not necessary to provide the
first retaining pieces 41 and thesecond retaining pieces 42 on each of theside walls first retaining pieces 41 and thesecond retaining pieces 42 may be formed on theside wall 231 a, which includes the through-holes 23 h. For example, thefirst retaining pieces 41 or thesecond retaining pieces 42 may be formed on theside wall 231 a, which includes the through-holes 23 h. - In the embodiment, for example, the
coupling base 31 may include protrusions such that the protrusions engage with thesecond retaining pieces 42 to limit the amount of the elastic deformation of thesecond retaining pieces 42. In this case, the protrusions serve as engaging portions. - In the embodiment, the width H1 of the
first retaining pieces 41 may be the same as the width H2 of thesecond retaining pieces 42. The width H1 of thefirst retaining pieces 41 may be less than the width H2 of thesecond retaining pieces 42. - In the embodiment, the
coupling base 31 may be omitted. Further, thecapacitor holder 23 may be coupled to theend wall 12 a of thesuction housing member 12. In this case, theend wall 12 a of thesuction housing member 12 serves as a coupling member to which thecapacitor holder 23 is coupled. Therecesses 51 may be formed in the surface of theend wall 12 a facing thecapacitor holder 23. - In the embodiment, the number of the
film capacitor 22 is not particularly limited. That is, the number may be appropriately changed. - In the embodiment, the capacitors may include an electrolytic capacitor, for example.
- In the embodiment, the
motor driving circuit 20 may be located radially outward of therotation shaft 19, for example. - In the embodiment, the
compression unit 15 may be of a piston type or a vane type, for example. - In the embodiment, the motor-driven
compressor 10 may be used for any air conditioning device other than that installed in a vehicle. - Therefore, the present examples and embodiments are to be considered as illustrative and not restrictive and the invention is not to be limited to the details given herein, but may be modified within the scope and equivalence of the appended claims.
Claims (9)
1. A motor-driven compressor, comprising:
a compression unit adapted to compress refrigerant;
an electric motor adapted to drive the compression unit;
a housing that accommodates the compression unit and the electric motor;
a motor driving circuit that is adapted to drive the electric motor and includes a circuit board and a capacitor that is electrically connected to the circuit board; and
a capacitor holder that is made of a plastic and holds the capacitor, wherein
the capacitor holder includes
a side wall body, which covers a side surface of the capacitor,
a first retainer, which extends from the side wall body toward the circuit board and engages with a first end surface of the capacitor to hold the capacitor, and
a second retainer, which extends from the side wall body in a direction away from the circuit board and engages with a second end surface of the capacitor to hold the capacitor, wherein
a length of the second retainer in an extending direction of the second retainer is greater than a length of the first retainer in an extending direction of the first retainer, and
the second retainer is elastically deformed so that the capacitor holder accommodates the capacitor.
2. The motor-driven compressor according to claim 1 , wherein
the second retainer is one of a plurality of second retainer provided for the capacitor,
the first retainer is provided such that the first retainer is located between an adjacent pair of the second retainers, and
a width of the first retainer is greater than a width of each of the second retainer.
3. The motor-driven compressor according to claim 1 , wherein
the capacitor includes a lead, which protrudes from the capacitor, wherein the capacitor is electrically connected through the lead to the circuit board, and
the side wall body includes a through-hole, which guides the lead to a portion of the circuit board to which the lead is to be connected.
4. The motor-driven compressor according to claim 3 , wherein
the capacitor has a substantially cuboid shape,
the side wall body has a hollowed polygonal shape configured by a plurality of side walls, which surround four sides of the capacitor,
the through-hole is formed in one of the side walls that is positioned to face one of the four sides of the capacitor, and
the first retainer and the second retainer are provided in each of two of the side walls that face each other, wherein the two side walls that face each other are formed to be continuous with the side wall in which the through-hole is formed.
5. The motor-driven compressor according to claim 1 , further comprising a coupling member, which configures a part of the housing, wherein
the capacitor holder is coupled to the coupling member, and
the coupling member includes an engaging portion, which engages with the second retainer to limit an amount of elastic deformation of the second retainer.
6. The motor-driven compressor according to claim 5 , wherein the engaging portion includes a recess.
7. The motor-driven compressor according to claim 1 , wherein the capacitor is a film capacitor.
8. The motor-driven compressor according to claim 1 , further comprising a rotation shaft that is accommodated in the housing and rotated integrally with a rotor of the electric motor, wherein
the compression unit, the electric motor, and the motor driving circuit are arranged in this order along an axis of the rotation shaft.
9. The motor-driven compressor according to claim 1 , wherein the motor-driven compressor is mounted on a vehicle.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-132615 | 2013-06-25 | ||
JP2013132615A JP5949681B2 (en) | 2013-06-25 | 2013-06-25 | Electric compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140377096A1 true US20140377096A1 (en) | 2014-12-25 |
Family
ID=52111081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/312,868 Abandoned US20140377096A1 (en) | 2013-06-25 | 2014-06-24 | Motor-driven compressor |
Country Status (4)
Country | Link |
---|---|
US (1) | US20140377096A1 (en) |
JP (1) | JP5949681B2 (en) |
KR (1) | KR101591027B1 (en) |
CN (1) | CN104251189B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10053304B2 (en) * | 2015-07-28 | 2018-08-21 | B&R Industrial Automation GmbH | Holder |
DE102020129134B4 (en) | 2020-11-05 | 2022-05-25 | Audi Aktiengesellschaft | Protective device for a pulse-controlled inverter |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7314814B2 (en) * | 2020-01-29 | 2023-07-26 | 株式会社豊田自動織機 | electric compressor |
JP2024103308A (en) * | 2023-01-20 | 2024-08-01 | サンデン株式会社 | Electric compressor and manufacturing method thereof |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5865413A (en) * | 1995-08-07 | 1999-02-02 | Motorola Inc. | Surface mountable component holder |
US6619933B2 (en) * | 2000-08-29 | 2003-09-16 | Sanden Corporation | Motor-driven compressors |
US20070002594A1 (en) * | 2005-06-29 | 2007-01-04 | Honda Motor Co., Ltd. | Capacitor mounting type inverter unit |
US20080181791A1 (en) * | 2007-01-29 | 2008-07-31 | Masao Iguchi | Electric compressor |
US7972123B2 (en) * | 2006-03-29 | 2011-07-05 | Kabushiki Kaisha Toyota Jidoshokki | Electric compressor |
US20110189035A1 (en) * | 2010-02-01 | 2011-08-04 | Mitsubishi Heavy Industries, Ltd. | Integrated-inverter electric compressor |
US20130140079A1 (en) * | 2010-08-25 | 2013-06-06 | Kitagawa Industries Co., Ltd. | Capacitor holder |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0747902Y2 (en) * | 1989-03-30 | 1995-11-01 | ローム株式会社 | Mounting device for mounting chip type electronic components |
JP2001041499A (en) * | 1999-08-02 | 2001-02-13 | Toshiba Kyaria Kk | Inverter control device and manufacture thereof |
JP4436192B2 (en) * | 2004-06-07 | 2010-03-24 | 三菱重工業株式会社 | Control device for electric compressor |
KR100659977B1 (en) * | 2004-11-03 | 2006-12-26 | 센서스앤드컨트롤스코리아 주식회사 | Clamp device for connecting package of refrigerator compressor |
JP5045649B2 (en) * | 2008-11-17 | 2012-10-10 | 株式会社村田製作所 | Ceramic capacitor and electronic component including the same |
JP5353251B2 (en) * | 2009-01-07 | 2013-11-27 | Tdk株式会社 | Multilayer capacitor and multilayer capacitor mounting structure |
JP5522009B2 (en) * | 2010-12-02 | 2014-06-18 | 株式会社豊田自動織機 | Electric compressor |
JP5626200B2 (en) * | 2011-01-06 | 2014-11-19 | 株式会社豊田自動織機 | Electrical component fixing structure |
JP5936313B2 (en) * | 2011-04-22 | 2016-06-22 | 三菱電機株式会社 | Electronic component mounting structure |
JP5644706B2 (en) * | 2011-07-19 | 2014-12-24 | 株式会社豊田自動織機 | Electronic component fixing structure for electric compressor |
-
2013
- 2013-06-25 JP JP2013132615A patent/JP5949681B2/en not_active Expired - Fee Related
-
2014
- 2014-06-23 CN CN201410284059.8A patent/CN104251189B/en not_active Expired - Fee Related
- 2014-06-23 KR KR1020140076423A patent/KR101591027B1/en active IP Right Grant
- 2014-06-24 US US14/312,868 patent/US20140377096A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5865413A (en) * | 1995-08-07 | 1999-02-02 | Motorola Inc. | Surface mountable component holder |
US6619933B2 (en) * | 2000-08-29 | 2003-09-16 | Sanden Corporation | Motor-driven compressors |
US20070002594A1 (en) * | 2005-06-29 | 2007-01-04 | Honda Motor Co., Ltd. | Capacitor mounting type inverter unit |
US7972123B2 (en) * | 2006-03-29 | 2011-07-05 | Kabushiki Kaisha Toyota Jidoshokki | Electric compressor |
US20080181791A1 (en) * | 2007-01-29 | 2008-07-31 | Masao Iguchi | Electric compressor |
US20110189035A1 (en) * | 2010-02-01 | 2011-08-04 | Mitsubishi Heavy Industries, Ltd. | Integrated-inverter electric compressor |
US20130140079A1 (en) * | 2010-08-25 | 2013-06-06 | Kitagawa Industries Co., Ltd. | Capacitor holder |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10053304B2 (en) * | 2015-07-28 | 2018-08-21 | B&R Industrial Automation GmbH | Holder |
DE102020129134B4 (en) | 2020-11-05 | 2022-05-25 | Audi Aktiengesellschaft | Protective device for a pulse-controlled inverter |
US11791742B2 (en) | 2020-11-05 | 2023-10-17 | Audi Ag | Protection device for a pulse inverter |
Also Published As
Publication number | Publication date |
---|---|
JP2015007392A (en) | 2015-01-15 |
CN104251189B (en) | 2017-01-11 |
JP5949681B2 (en) | 2016-07-13 |
KR20150000836A (en) | 2015-01-05 |
KR101591027B1 (en) | 2016-02-02 |
CN104251189A (en) | 2014-12-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10087942B2 (en) | Motor driven compressor | |
US20150056086A1 (en) | Electric compressor | |
JP6256382B2 (en) | Electric compressor | |
JP6380034B2 (en) | Automotive electronics | |
US9394905B2 (en) | Motor-driven compressor including a shield to block electromagnetic noise | |
US20140377096A1 (en) | Motor-driven compressor | |
US20090151389A1 (en) | Motor-driven compressor | |
US10119528B2 (en) | Electric compressor with component for blocking electromagnetic noise | |
US20140377095A1 (en) | Motor-driven compressor | |
US10125775B2 (en) | Motor-driven compressor | |
KR101718634B1 (en) | Electric compressor | |
JP6131463B2 (en) | Stator fixing method of motor part in hermetic compressor | |
CN111756189A (en) | Electric compressor | |
KR102625341B1 (en) | Motor-driven compressor | |
KR20150033072A (en) | Electric compressor | |
JP5931488B2 (en) | Electric compressor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YANO, JUNYA;FUJII, AKIO;TAKAHATA, JUNICHI;SIGNING DATES FROM 20140619 TO 20140620;REEL/FRAME:033187/0908 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |