US20110142695A1 - Electric compressor - Google Patents
Electric compressor Download PDFInfo
- Publication number
- US20110142695A1 US20110142695A1 US13/001,161 US200913001161A US2011142695A1 US 20110142695 A1 US20110142695 A1 US 20110142695A1 US 200913001161 A US200913001161 A US 200913001161A US 2011142695 A1 US2011142695 A1 US 2011142695A1
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- United States
- Prior art keywords
- motor
- terminal body
- driving circuit
- lead wire
- threaded portion
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/14—Provisions for readily assembling or disassembling
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- 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
- F04C2240/803—Electric connectors or cables; Fittings therefor
Definitions
- the present invention relates to an electric compressor provided with a motor for driving a compression section, a motor driving circuit for driving the motor, and a sealed terminal for electrically connecting the motor and the motor driving circuit.
- an electric compressor of this kind there has hitherto been known an electric compressor which is provided with a compression section for compressing a cooling medium, a motor for driving the compression section, a motor driving circuit for driving the motor, and a sealed terminal which is provided in a partition wall for partitioning a space between the motor and the motor driving circuit and is intended for electrically connecting a lead wire on the motor side and a lead wire on the motor driving circuit side (refer to Patent Document 1, for example).
- the object of the present invention is to provide an electric compressor in which a lead wire on the motor driving circuit side can be electrically connected positively to a sealed terminal.
- the present invention provides an electric compressor which includes: a compression section for compressing a cooling medium, a motor for driving the compression section, a motor driving circuit for driving the motor, a sealed terminal which is provided in a partition wall for partitioning a space between the motor and the motor driving circuit and is intended for electrically connecting a lead wire on the motor side and a lead wire on the motor driving circuit side.
- the sealed terminal has a terminal body which is made of a metal having electrical conductivity and whose end is provided with a male threaded portion, and a joining member made of a metal having electrical conductivity and which is different from the material for the terminal body. The joining member is provided so as to be capable of being screwed to the male threaded portion of the terminal body.
- the joining member is screwed to the male threaded portion of the terminal body and, therefore, it becomes possible to positively join the joining member made of a different material to the terminal body.
- the present invention because it is possible to positively join the joining member of a different material to the terminal body and to positively join the lead material of the same material as the joining member to the joining nut by welding, it becomes possible to electrically connect a lead wire on the motor driving circuit side positively to the sealed terminal.
- FIG. 1 is a side sectional view of an electric compressor in an embodiment of the present invention.
- FIG. 2 is a sectional view of a sealed terminal.
- FIG. 3 is an exploded perspective view of the sealed terminal.
- FIG. 4 is a sectional view showing another example of a sealed terminal.
- FIGS. 1 to 3 show an embodiment of the present invention.
- the electric compressor of the present invention is a scroll-type electric compressor which is provided with a housing 10 formed in cylindrical shape, a compression section 20 for compressing a cooling medium, a motor 30 for driving the compression section 20 , and a driving circuit section 40 as a motor driving circuit for performing the operation control of the motor 30 , and for example, HFC-134a and carbon dioxide are used as a cooling medium.
- the housing 10 is composed of a first housing 11 in which the compression section 20 is housed, a second housing 12 in which the motor 30 is housed, and a third housing 13 in which the driving circuit section 40 is housed.
- the first housing 11 is such that one end surface thereof is closed and the other end surface thereof is joined to one end surface of the second housing 12 .
- a cooling medium discharge port which is not shown, is provided on a peripheral surface of the first housing 11 on the side of the one end surface.
- the second housing 12 is such that one end surface thereof is joined to the first housing 11 and the other end surface thereof is joined to one end surface of the third housing 13 .
- the first housing 11 and the second housing 12 are joined together by a bolt 14 via a center plate 25 , which will be described later, for rotatably supporting the side of one end of a driving shaft, which will be described later, for driving the compression section 20 .
- the third housing 13 is such that the side of one end surface thereof is joined to the second housing 12 and the side of the other end surface thereof is closed by a closing plate 15 so as to be openable.
- a cooling medium suction port is provided on a peripheral surface of the third housing 13 on the side of one end surface thereof.
- the third housing 13 is such that the interior thereof is partitioned by a partition wall 13 a into the side of one end surface including the cooling medium suction port and the side of the other end surface, and the third housing 13 is provided with a driving circuit housing chamber 13 b for housing the driving circuit section 40 and a cooling medium suction chamber 13 c in communication with the motor 30 side.
- the compression section 20 has a fixed scroll member 21 fixed to the side of one end of the first housing 11 and a turning scroll member 22 provided on the side of the other end of the first housing 11 so as to be rotatable with respect to the fixed scroll member 21 .
- the fixed scroll member 21 is formed from a member in the shape of a disk provided so as to divide the interior of the first housing 11 , and a convoluted body 21 a is provided on a surface on the turning scroll member 22 side.
- a cooling medium discharge hole 21 b for discharging a cooling medium compressed in the compression section 20 .
- a cooling medium discharge chamber 11 a is provided between one end surface in the first housing 11 and the fixed scroll member 21 so that a cooling medium discharged from the cooling medium discharge port flows into the cooling medium discharge chamber 11 a.
- the turning scroll member 22 is such that a convoluted body 22 a is provided on the surface thereof on the fixed scroll member 21 side, and to the surface on the opposite side, there is connected, via a driving bush 24 , the side of one end of a driving shaft 23 for transmitting the torque of the motor 30 .
- the driving shaft 23 is provided so as to extend along the central axis of the second housing 12 .
- the driving shaft 23 is provided in such a manner that a connection 23 a to the driving bush 24 is eccentric from the rotation center of the driving shaft 23 .
- the driving shaft 23 is such that the side of one end thereof is rotatably supported by a center plate 25 provided between the compression section 20 and the motor 30 via a ball bearing 26 and the side of the other end thereof is rotatably supported via a bearing 12 a (a ball bearing 27 ) provided on the side of the other end surface of the second housing 12 . That is, the driving shaft 23 is rotated by the motor 30 and is adapted to cause the turning scroll member 22 to rotate on a prescribed circular orbit.
- the center plate 25 is provided so as to divide the space on the compression section 20 side and the space on the motor 30 side in the housing 10 , and there is provided a communication hole for providing communication between the space on the compression section 20 side and the space on the motor 30 side. Also, the center plate 25 is provided with a flanged portion 25 a extending in the circumferential direction of an outer circumferential surface so that the flanged portion 25 a becomes sandwiched between the first housing 11 and the second housing 12 .
- a rotating position regulating mechanism 28 consisting of pins which are each fixed to the turning scroll member 22 and the center plate 25 in order to regulate the rotating position of turning scroll member 22 , and a connecting member for connecting the pins together.
- the motor 30 is composed of a three-phase induction motor and the like and has a rotor 31 formed from a permanent magnet fixed to the driving shaft 23 , and a stator 32 which is provided so as to surround the rotor 31 and is fixed in the second housing 12 .
- the driving circuit section 40 is composed of an inverter circuit 41 having, on a substrate, power semiconductor elements 41 a as a plurality of heat generating parts, a power circuit part 42 , such as a smoothing capacitor and a noise filter, a control section 43 of a microcomputer configuration, and the like.
- the driving circuit section 40 is housed in the driving circuit housing chamber 13 b and is fixed in the driving circuit housing chamber 13 b by use of a molded resin 44 .
- This motor compressor is provided with three sealed terminals 50 provided in the partition wall 13 a positioned below the cooling medium suction chamber 13 c and intended for supplying the electrical power from the inverter circuit 41 to the winding of the stator 32 .
- Each of the sealed terminals 50 is composed of a terminal body 51 inserted into a through hole 13 d provided in the partition wall 13 a , a fixing nut 52 for fixing the terminal body 51 to the partition wall 13 a , a first insulating member 53 to be interposed on the second housing 12 side of the partition wall 13 a , a second insulating member 54 to be interposed between the fixing nut 52 and the partition wall 13 a , a joining nut 55 which is connectably provided to an end portion of the terminal body 51 on the driving circuit housing chamber 13 b side and to which a lead wire 45 on the driving circuit housing chamber 13 b side is joined by welding, and an insulating cover 56 for covering the terminal body 51 from the second housing 12 side.
- the lead wire 45 on the driving circuit housing chamber 13 b side is formed from a cuprous material.
- the terminal body 51 is made of a ferrous metal and is such that an end portion thereof on the second housing 12 side is provided with a flange 51 a and an end portion thereof on the driving circuit housing chamber 13 b side is provided with a male threaded portion 51 b and it is ensured that the lead wire 33 on the motor 30 side is connected to the end portion on the second housing 12 side.
- the terminal body 51 is attached to the partition wall 13 a by screwing the fixing nut 52 to the male threaded portion 51 b , with the first insulating member 53 interposed on the second housing 12 side of the partition wall 13 a and the second insulating member 54 interposed on the driving circuit housing chamber 13 b side of the partition wall 13 a.
- the first insulating member 53 and the second insulating member 54 are each formed from a member having insulating properties, such as ceramics and resins.
- the first insulating member 53 are provided with three holes 53 a , through each of which three terminal bodies 51 are inserted, and one first insulating member 53 is interposed for the three terminal bodies 51 .
- the second insulating member 54 is provided with a hole 54 a through which the terminal body 51 is inserted, and one second insulating member 54 is interposed for one terminal body 51 .
- the joining nut 55 is made of a cuprous metal and is formed in the shape of a cap nut which is such that the side of one end thereof is closed.
- the joining nut 55 is provided with a weld 55 a so as to protrude from the side of one end and it is ensured that the lead wire 45 on the driving circuit housing chamber 13 b side is jointed to the weld 55 a by welding.
- the joining nut 55 is provided in such a manner that the length along which the joining nut 55 fits over the male threaded portion 51 b of the terminal body 51 is at least not less than 0.4 times the diameter of the male threaded portion 51 b.
- the insulating cover 56 is made of a material having elasticity and insulating properties, such as rubber.
- the insulating cover 56 is formed so as to cover the whole area of one end surface of the first insulating member 53 , and end portions of the three terminal bodies 51 are covered.
- the insulating cover 56 are provided with three holes 56 a , through each of which three lead wires 33 on the motor 30 side are inserted.
- the driving shaft 23 is rotated by passing a current to the motor 30 , whereby in the compression section 20 the turning scroll member 22 performs a rotating motion with respect to the fixed scroll member 21 .
- a cooling medium which flows into the housing 10 from the cooling medium suction port cools each of power semiconductor elements 41 a of the inverter circuit 41 of the driving circuit section 40 via the partition wall 13 a of the cooling medium suction chamber 13 c and cools the motor 30 by flowing through the interior of the second housing 12 .
- the cooling medium which has flown through the interior of the second housing 12 flows between the turning scroll member 22 and the center plate 25 via the communication hole of the center plate 25 , cools the rotating position regulating mechanism 50 and then flows into the compression section 20 .
- the cooling medium compressed in the compression section 20 flows from the cooling medium discharge hole 21 b into the cooling medium discharge chamber 11 a and is discharged from the cooling medium discharge port.
- the joining nut 55 is screwed to the male threaded portion 51 b , with the terminal body 51 attached to the partition wall 13 a , and the lead wire 45 is joined to the weld 55 a of the joining nut 55 by welding.
- the sealed terminal 50 has a terminal body 51 which is made of a metal having electrical conductivity and whose end is provided with a male threaded portion 51 b , and a joining nut 55 made of a metal having electrical conductivity and which is different from the material for the terminal body 51 , and is threadably mounted on the male threaded portion 51 b of the terminal body 51 .
- a joining nut 55 made of a metal having electrical conductivity and which is different from the material for the terminal body 51 , and is threadably mounted on the male threaded portion 51 b of the terminal body 51 .
- the above-described terminal body 51 is made of a ferrous metal and the joining nut 55 is made of a cuprous metal, it is possible to easily weld the lead wire 45 made of a cuprous metal to the joining nut 55 and it becomes possible to positively connect the lead wire 45 made of a cuprous metal to the terminal body 51 made of a ferrous metal.
- the length along which the joining nut 55 fits over the male threaded portion 51 b of the terminal body 51 is not less than 0.4 times the diameter of the male threaded portion 51 b , it is possible to positively attach the joining nut 55 to the terminal body 51 and it is possible to ensure a contact area of not less than a prescribed contact area between the terminal body and the joining nut 55 . This enables the strength of the sealed terminal 50 to be increased and the electric resistance thereof to be reduced.
- the weld 55 a which is formed on the joining nut 55 so as to protrude from the side of one end and to which the lead wire 45 on the driving circuit housing chamber 13 b is joined by welding.
- the lead wire 45 may be joined directly to the side of one end of the joining nut 55 by welding without the provision of the weld 55 a in the joining nut 55 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The present invention provides an electric compressor in which a lead wire on the motor driving circuit side can be electrically connected positively to a sealed terminal. Because the sealed terminal is formed from a terminal body which is made of a metal having electrical conductivity and whose end is provided with a male threaded portion, and a joining nut made of a metal having electrical conductivity and which is different from the material for the terminal body, and is threadably mounted on the male threaded portion of the terminal body, it is possible to positively join the joining nut of a different material to the terminal body and to positively join the lead wire of the same material as the joining nut to the joining nut by welding, whereby it becomes possible to electrically connect a lead wire on the driving circuit housing chamber side positively to the sealed terminal.
Description
- The present invention relates to an electric compressor provided with a motor for driving a compression section, a motor driving circuit for driving the motor, and a sealed terminal for electrically connecting the motor and the motor driving circuit.
- As an electric compressor of this kind, there has hitherto been known an electric compressor which is provided with a compression section for compressing a cooling medium, a motor for driving the compression section, a motor driving circuit for driving the motor, and a sealed terminal which is provided in a partition wall for partitioning a space between the motor and the motor driving circuit and is intended for electrically connecting a lead wire on the motor side and a lead wire on the motor driving circuit side (refer to
Patent Document 1, for example). -
- Patent Document 1: Japanese Patent Publication No. 11-324920
- In conventional electric compressor, in connecting a lead wire on the motor driving circuit side to a sealed terminal, the lead wire is welded to the sealed terminal or connecting is performed by using a connector. However, because the sealed terminal is made of a ferrous metal and the lead wire on the motor driving circuit side is made of a cuprous metal, in welding the lead wire on the motor driving circuit side to the sealed terminal, welding becomes difficult because these have different melting points. Also, in connecting the lead wire on the motor driving circuit side to the sealed terminal by using a connector, the connection is accomplished only by the elastic force of the metal material for the connector. Therefore, the area of contact between the sealed terminal and the lead wire is small and hence this connection method is not suitable for the application of a large current.
- The object of the present invention is to provide an electric compressor in which a lead wire on the motor driving circuit side can be electrically connected positively to a sealed terminal.
- In order to achieve the above object, the present invention provides an electric compressor which includes: a compression section for compressing a cooling medium, a motor for driving the compression section, a motor driving circuit for driving the motor, a sealed terminal which is provided in a partition wall for partitioning a space between the motor and the motor driving circuit and is intended for electrically connecting a lead wire on the motor side and a lead wire on the motor driving circuit side. In this electric compressor, the sealed terminal has a terminal body which is made of a metal having electrical conductivity and whose end is provided with a male threaded portion, and a joining member made of a metal having electrical conductivity and which is different from the material for the terminal body. The joining member is provided so as to be capable of being screwed to the male threaded portion of the terminal body.
- As a result of this, the joining member is screwed to the male threaded portion of the terminal body and, therefore, it becomes possible to positively join the joining member made of a different material to the terminal body.
- According to the present invention, because it is possible to positively join the joining member of a different material to the terminal body and to positively join the lead material of the same material as the joining member to the joining nut by welding, it becomes possible to electrically connect a lead wire on the motor driving circuit side positively to the sealed terminal.
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FIG. 1 is a side sectional view of an electric compressor in an embodiment of the present invention. -
FIG. 2 is a sectional view of a sealed terminal. -
FIG. 3 is an exploded perspective view of the sealed terminal. -
FIG. 4 is a sectional view showing another example of a sealed terminal. -
FIGS. 1 to 3 show an embodiment of the present invention. - The electric compressor of the present invention is a scroll-type electric compressor which is provided with a
housing 10 formed in cylindrical shape, acompression section 20 for compressing a cooling medium, amotor 30 for driving thecompression section 20, and adriving circuit section 40 as a motor driving circuit for performing the operation control of themotor 30, and for example, HFC-134a and carbon dioxide are used as a cooling medium. - The
housing 10 is composed of afirst housing 11 in which thecompression section 20 is housed, asecond housing 12 in which themotor 30 is housed, and athird housing 13 in which thedriving circuit section 40 is housed. - The
first housing 11 is such that one end surface thereof is closed and the other end surface thereof is joined to one end surface of thesecond housing 12. A cooling medium discharge port, which is not shown, is provided on a peripheral surface of thefirst housing 11 on the side of the one end surface. - The
second housing 12 is such that one end surface thereof is joined to thefirst housing 11 and the other end surface thereof is joined to one end surface of thethird housing 13. - The
first housing 11 and thesecond housing 12 are joined together by abolt 14 via acenter plate 25, which will be described later, for rotatably supporting the side of one end of a driving shaft, which will be described later, for driving thecompression section 20. - The
third housing 13 is such that the side of one end surface thereof is joined to thesecond housing 12 and the side of the other end surface thereof is closed by aclosing plate 15 so as to be openable. A cooling medium suction port is provided on a peripheral surface of thethird housing 13 on the side of one end surface thereof. Furthermore, thethird housing 13 is such that the interior thereof is partitioned by a partition wall 13 a into the side of one end surface including the cooling medium suction port and the side of the other end surface, and thethird housing 13 is provided with a driving circuit housing chamber 13 b for housing thedriving circuit section 40 and a cooling medium suction chamber 13 c in communication with themotor 30 side. - The
compression section 20 has afixed scroll member 21 fixed to the side of one end of thefirst housing 11 and a turningscroll member 22 provided on the side of the other end of thefirst housing 11 so as to be rotatable with respect to the fixedscroll member 21. - The fixed
scroll member 21 is formed from a member in the shape of a disk provided so as to divide the interior of thefirst housing 11, and a convoluted body 21 a is provided on a surface on the turningscroll member 22 side. In the radially middle part of the fixedscroll member 21, there is provided a cooling medium discharge hole 21 b for discharging a cooling medium compressed in thecompression section 20. A cooling medium discharge chamber 11 a is provided between one end surface in thefirst housing 11 and thefixed scroll member 21 so that a cooling medium discharged from the cooling medium discharge port flows into the cooling medium discharge chamber 11 a. - The turning
scroll member 22 is such that a convoluted body 22 a is provided on the surface thereof on thefixed scroll member 21 side, and to the surface on the opposite side, there is connected, via adriving bush 24, the side of one end of adriving shaft 23 for transmitting the torque of themotor 30. - The
driving shaft 23 is provided so as to extend along the central axis of thesecond housing 12. Thedriving shaft 23 is provided in such a manner that a connection 23 a to the drivingbush 24 is eccentric from the rotation center of thedriving shaft 23. Also, thedriving shaft 23 is such that the side of one end thereof is rotatably supported by acenter plate 25 provided between thecompression section 20 and themotor 30 via a ball bearing 26 and the side of the other end thereof is rotatably supported via a bearing 12 a (a ball bearing 27) provided on the side of the other end surface of thesecond housing 12. That is, the drivingshaft 23 is rotated by themotor 30 and is adapted to cause the turningscroll member 22 to rotate on a prescribed circular orbit. - The
center plate 25 is provided so as to divide the space on thecompression section 20 side and the space on themotor 30 side in thehousing 10, and there is provided a communication hole for providing communication between the space on thecompression section 20 side and the space on themotor 30 side. Also, thecenter plate 25 is provided with a flanged portion 25 a extending in the circumferential direction of an outer circumferential surface so that the flanged portion 25 a becomes sandwiched between thefirst housing 11 and thesecond housing 12. - Between the turning
scroll member 22 and thecenter plate 25, there are provided a rotatingposition regulating mechanism 28 consisting of pins which are each fixed to the turningscroll member 22 and thecenter plate 25 in order to regulate the rotating position of turningscroll member 22, and a connecting member for connecting the pins together. - The
motor 30 is composed of a three-phase induction motor and the like and has arotor 31 formed from a permanent magnet fixed to thedriving shaft 23, and astator 32 which is provided so as to surround therotor 31 and is fixed in thesecond housing 12. - The
driving circuit section 40 is composed of an inverter circuit 41 having, on a substrate, power semiconductor elements 41 a as a plurality of heat generating parts, a power circuit part 42, such as a smoothing capacitor and a noise filter, a control section 43 of a microcomputer configuration, and the like. Thedriving circuit section 40 is housed in the driving circuit housing chamber 13 b and is fixed in the driving circuit housing chamber 13 b by use of a molded resin 44. - This motor compressor is provided with three sealed
terminals 50 provided in the partition wall 13 a positioned below the cooling medium suction chamber 13 c and intended for supplying the electrical power from the inverter circuit 41 to the winding of thestator 32. - Each of the sealed
terminals 50 is composed of aterminal body 51 inserted into a through hole 13 d provided in the partition wall 13 a, a fixing nut 52 for fixing theterminal body 51 to the partition wall 13 a, a firstinsulating member 53 to be interposed on thesecond housing 12 side of the partition wall 13 a, a secondinsulating member 54 to be interposed between the fixing nut 52 and the partition wall 13 a, a joiningnut 55 which is connectably provided to an end portion of theterminal body 51 on the driving circuit housing chamber 13 b side and to which a lead wire 45 on the driving circuit housing chamber 13 b side is joined by welding, and aninsulating cover 56 for covering theterminal body 51 from thesecond housing 12 side. The lead wire 45 on the driving circuit housing chamber 13 b side is formed from a cuprous material. - The
terminal body 51 is made of a ferrous metal and is such that an end portion thereof on thesecond housing 12 side is provided with aflange 51 a and an end portion thereof on the driving circuit housing chamber 13 b side is provided with a male threaded portion 51 b and it is ensured that thelead wire 33 on themotor 30 side is connected to the end portion on thesecond housing 12 side. Theterminal body 51 is attached to the partition wall 13 a by screwing the fixing nut 52 to the male threaded portion 51 b, with the first insulatingmember 53 interposed on thesecond housing 12 side of the partition wall 13 a and the second insulatingmember 54 interposed on the driving circuit housing chamber 13 b side of the partition wall 13 a. - The first insulating
member 53 and the second insulatingmember 54 are each formed from a member having insulating properties, such as ceramics and resins. The first insulatingmember 53 are provided with three holes 53 a, through each of which threeterminal bodies 51 are inserted, and one first insulatingmember 53 is interposed for the threeterminal bodies 51. The second insulatingmember 54 is provided with a hole 54 a through which theterminal body 51 is inserted, and one second insulatingmember 54 is interposed for oneterminal body 51. - The joining
nut 55 is made of a cuprous metal and is formed in the shape of a cap nut which is such that the side of one end thereof is closed. The joiningnut 55 is provided with a weld 55 a so as to protrude from the side of one end and it is ensured that the lead wire 45 on the driving circuit housing chamber 13 b side is jointed to the weld 55 a by welding. The joiningnut 55 is provided in such a manner that the length along which the joiningnut 55 fits over the male threaded portion 51 b of theterminal body 51 is at least not less than 0.4 times the diameter of the male threaded portion 51 b. - The insulating
cover 56 is made of a material having elasticity and insulating properties, such as rubber. The insulatingcover 56 is formed so as to cover the whole area of one end surface of the first insulatingmember 53, and end portions of the threeterminal bodies 51 are covered. Theinsulating cover 56 are provided with three holes 56 a, through each of which threelead wires 33 on themotor 30 side are inserted. - In the electric compressor configured as described above, the
driving shaft 23 is rotated by passing a current to themotor 30, whereby in thecompression section 20 the turningscroll member 22 performs a rotating motion with respect to the fixedscroll member 21. As a result of this, a cooling medium which flows into thehousing 10 from the cooling medium suction port cools each of power semiconductor elements 41 a of the inverter circuit 41 of the drivingcircuit section 40 via the partition wall 13 a of the cooling medium suction chamber 13 c and cools themotor 30 by flowing through the interior of thesecond housing 12. The cooling medium which has flown through the interior of thesecond housing 12 flows between the turningscroll member 22 and thecenter plate 25 via the communication hole of thecenter plate 25, cools the rotatingposition regulating mechanism 50 and then flows into thecompression section 20. The cooling medium compressed in thecompression section 20 flows from the cooling medium discharge hole 21 b into the cooling medium discharge chamber 11 a and is discharged from the cooling medium discharge port. - In each of the sealed
terminals 50, in performing the work to connect the lead wire 45 on the driving circuit housing chamber 13 b side, the joiningnut 55 is screwed to the male threaded portion 51 b, with theterminal body 51 attached to the partition wall 13 a, and the lead wire 45 is joined to the weld 55 a of the joiningnut 55 by welding. - As described earlier, according to the electric compressor of this embodiment, the sealed
terminal 50 has aterminal body 51 which is made of a metal having electrical conductivity and whose end is provided with a male threaded portion 51 b, and a joiningnut 55 made of a metal having electrical conductivity and which is different from the material for theterminal body 51, and is threadably mounted on the male threaded portion 51 b of theterminal body 51. As a result of this, it is possible to positively join the joiningnut 55 of a different material to theterminal body 51 and to positively join the lead wire 45 of the same material as the joiningnut 55 to the joiningnut 55 by welding, and hence it becomes possible to electrically connect a lead wire 45 on the driving circuit housing chamber 13 b side positively to the sealedterminal 50. - Because the above-described
terminal body 51 is made of a ferrous metal and the joiningnut 55 is made of a cuprous metal, it is possible to easily weld the lead wire 45 made of a cuprous metal to the joiningnut 55 and it becomes possible to positively connect the lead wire 45 made of a cuprous metal to theterminal body 51 made of a ferrous metal. - Because the length along which the joining
nut 55 fits over the male threaded portion 51 b of theterminal body 51 is not less than 0.4 times the diameter of the male threaded portion 51 b, it is possible to positively attach the joiningnut 55 to theterminal body 51 and it is possible to ensure a contact area of not less than a prescribed contact area between the terminal body and the joiningnut 55. This enables the strength of the sealedterminal 50 to be increased and the electric resistance thereof to be reduced. - In the above-described embodiment, a description was given of the weld 55 a which is formed on the joining
nut 55 so as to protrude from the side of one end and to which the lead wire 45 on the driving circuit housing chamber 13 b is joined by welding. However, as shown inFIG. 4 , the lead wire 45 may be joined directly to the side of one end of the joiningnut 55 by welding without the provision of the weld 55 a in the joiningnut 55. -
- 13 a: Partition wall 20: Compression section 30: Motor
- 33: Lead wire 40: Driving circuit section 45: Lead wire
- 50: Sealed terminal 51: Terminal body
- 51 b: Male threaded portion 55: Joining nut
Claims (4)
1. An electric compressor comprising:
a compression section for compressing a cooling medium; a motor for driving the compression section;
a motor driving circuit for driving the motor; and a sealed terminal which is provided in a partition wall for partitioning a space between the motor and the motor driving circuit and is intended for electrically connecting a lead wire on the motor side and a lead wire on the motor driving circuit side,
wherein the sealed terminal has a terminal body which is made of a metal having electrical conductivity and whose end is provided with a male threaded portion, and a joining member made of a metal having electrical conductivity and which is different from the material for the terminal body, the joining member being provided so as to be capable of being screwed to the male threaded portion of the terminal body.
2. The electric compressor according to claim 1 , wherein the terminal body is made of a ferrous metal and the joining member is made of a cuprous metal.
3. The electric compressor according to claim 1 or 2 , wherein the length along which the joining member fits over the male threaded portion of the terminal body is not less than 0.4 times the diameter of the male threaded portion.
4. The electric compressor according to claim 2 , wherein the length along which the joining member fits over the male threaded portion of the terminal body is not less than 0.4 times the diameter of the male threaded portion.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-173462 | 2008-07-02 | ||
JP2008173462A JP2010013979A (en) | 2008-07-02 | 2008-07-02 | Electric compressor |
PCT/JP2009/061749 WO2010001834A1 (en) | 2008-07-02 | 2009-06-26 | Electric compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110142695A1 true US20110142695A1 (en) | 2011-06-16 |
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ID=41465931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/001,161 Abandoned US20110142695A1 (en) | 2008-07-02 | 2009-06-26 | Electric compressor |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110142695A1 (en) |
EP (1) | EP2309129A1 (en) |
JP (1) | JP2010013979A (en) |
WO (1) | WO2010001834A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140134034A1 (en) * | 2011-06-13 | 2014-05-15 | Sanden Corporation | Fluid Machine |
US20170292517A1 (en) * | 2016-04-06 | 2017-10-12 | Lg Electronics Inc. | Motor-operated compressor |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3245712B1 (en) * | 2015-01-15 | 2020-06-24 | Pierburg Pump Technology GmbH | Auxiliary device for motor vehicle |
JP7262971B2 (en) * | 2018-10-30 | 2023-04-24 | 株式会社ヴァレオジャパン | electric compressor |
JP7366588B2 (en) * | 2019-05-21 | 2023-10-23 | 三菱重工サーマルシステムズ株式会社 | electric compressor |
KR102172263B1 (en) * | 2019-06-17 | 2020-10-30 | 엘지전자 주식회사 | Motor operated compressor |
Citations (5)
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US3897131A (en) * | 1973-02-16 | 1975-07-29 | Amp Inc | Sealed electrical connecting means |
US4103416A (en) * | 1975-10-21 | 1978-08-01 | New Nippon Electric Co., Ltd. | Method of manufacturing an hermatically sealed electrical terminal |
US5463314A (en) * | 1994-01-27 | 1995-10-31 | Delco Electronics Corporation | Gauge with magnetically fixed rest position |
US20020047360A1 (en) * | 2000-08-09 | 2002-04-25 | Denso Corporation | Vehicle rotary electric machine |
US7038339B2 (en) * | 2004-03-31 | 2006-05-02 | Sauer-Danfoss Inc. | Method and means of sealing an electrical conductor through the housing of a fluid filled motor |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5219971Y2 (en) * | 1971-08-23 | 1977-05-09 | ||
JPH04358776A (en) * | 1991-06-05 | 1992-12-11 | Daikin Ind Ltd | Compressor |
JP2583789Y2 (en) * | 1992-09-04 | 1998-10-27 | 株式会社前川製作所 | Sealed terminal structure for ammonia fluid machinery |
JPH109137A (en) * | 1996-06-25 | 1998-01-13 | Hitachi Ltd | Hermetic terminal |
JPH11324920A (en) | 1998-05-11 | 1999-11-26 | Toshiba Corp | Closed electric compressor |
JP2005054727A (en) * | 2003-08-06 | 2005-03-03 | Sanden Corp | Electric connection structure of motor-driven compressor |
JP5291285B2 (en) * | 2006-07-11 | 2013-09-18 | サンデン株式会社 | Sealed terminal device for electric compressor |
JP2008101233A (en) * | 2006-10-17 | 2008-05-01 | Jfe Steel Kk | Furnace body cooling apparatus in blast furnace |
-
2008
- 2008-07-02 JP JP2008173462A patent/JP2010013979A/en active Pending
-
2009
- 2009-06-26 WO PCT/JP2009/061749 patent/WO2010001834A1/en active Application Filing
- 2009-06-26 US US13/001,161 patent/US20110142695A1/en not_active Abandoned
- 2009-06-26 EP EP09773412A patent/EP2309129A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3897131A (en) * | 1973-02-16 | 1975-07-29 | Amp Inc | Sealed electrical connecting means |
US4103416A (en) * | 1975-10-21 | 1978-08-01 | New Nippon Electric Co., Ltd. | Method of manufacturing an hermatically sealed electrical terminal |
US5463314A (en) * | 1994-01-27 | 1995-10-31 | Delco Electronics Corporation | Gauge with magnetically fixed rest position |
US20020047360A1 (en) * | 2000-08-09 | 2002-04-25 | Denso Corporation | Vehicle rotary electric machine |
US7038339B2 (en) * | 2004-03-31 | 2006-05-02 | Sauer-Danfoss Inc. | Method and means of sealing an electrical conductor through the housing of a fluid filled motor |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140134034A1 (en) * | 2011-06-13 | 2014-05-15 | Sanden Corporation | Fluid Machine |
US9546656B2 (en) * | 2011-06-13 | 2017-01-17 | Sanden Holdings Corporation | Fluid machine |
US20170292517A1 (en) * | 2016-04-06 | 2017-10-12 | Lg Electronics Inc. | Motor-operated compressor |
US10502212B2 (en) * | 2016-04-06 | 2019-12-10 | Lg Electronics Inc. | Motor-operated compressor |
Also Published As
Publication number | Publication date |
---|---|
EP2309129A1 (en) | 2011-04-13 |
JP2010013979A (en) | 2010-01-21 |
WO2010001834A1 (en) | 2010-01-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SANDEN CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAGUCHI, MASANORI;OHSATO, KAZUMI;KOBAYASHI, EIJI;AND OTHERS;REEL/FRAME:025809/0416 Effective date: 20110204 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |