ELECTRIC COMPRESSOR

Description

TECHNICAL FIELD

The present invention relates to an electric compressor in which a hermetic plate having a hermetic pin is attached to a partition wall between a motor chamber and an inverter accommodation portion.

BACKGROUND ART

For example, an inverter-integrated electric compressor in which an inverter is attached to an inverter accommodation portion formed in a housing is used as a refrigerant compressor used in an air conditioning device of an electric vehicle. In this case, a motor is accommodated in a motor chamber of the housing, and a hermetic plate is provided on a partition wall between the motor chamber and the inverter accommodation portion. In addition, three hermetic pins of the hermetic plate electrically connect a circuit board of the inverter and the motor to each other (see, for example, Patent Literature 1).

Further, the hermetic pin is attached to the hermetic plate via a glass (insulator) for insulation. However, in Patent Literature 1, since the hermetic plate is attached to the partition wall on the motor chamber side, an insulator (sealing member) for insulating a connection portion between a high-voltage connector and the hermetic pin from the motor is attached to the glass.

CITATION LIST

Patent Literature

• • Patent Literature 1: Japanese U.S. Pat. No. 5,944,169
  • Patent Literature 2: Japanese U.S. Pat. No. 7,013,402

SUMMARY OF INVENTION

Problems to be Solved By Invention

Here, when the hermetic plate is attached to the partition wall on the motor chamber side as in Patent Literature 1, the inside of the motor chamber is overpacked. For this reason, it is conceivable to attach the hermetic plate to the partition wall on the inverter accommodation portion side. However, since the motor chamber has a high pressure and the inverter accommodation portion has an atmospheric pressure, it is necessary to seal between the hermetic plate and the partition wall with a seal material such as an O-ring in order to prevent refrigerant leakage due to a differential pressure.

In this case, for example, when an integrated insulator (heat insulator) is used for the three hermetic pins as in Patent Literature 2, the size of the seal material (O-ring) surrounding these three hermetic pins increases.

This case will be specifically described with reference to FIG. 7. FIG. 7 is a view showing a positional relationship between the hermetic plate and the seal material in the case of using the integrated insulator. In this figure, reference numeral 100 denotes a conventional hermetic plate, reference numeral 53 denotes a hermetic pin, and three hermetic pins 53 are attached side by side via a glass (not shown). Reference numeral 101 denotes a rubber insulator, and the insulator is integrally molded so as to be attached across the three hermetic pins 53. Reference numeral 102 denotes a seal material formed of an O-ring that surrounds the three hermetic pins 53 and the insulator 101.

The pressure in the motor chamber is applied to the motor-chamber-side face of the hermetic plate 100 inside the seal material 102 (region inside the seal material 102). However, in a case where the integrated insulator 101 is used as shown in FIG. 7, the seal material 102 is inevitably increased in size. For this reason, the area (pressure receiving area B shown in FIG. 7) where the pressure is applied to the hermetic plate 100 is large. Thus, the hermetic plate 100 is deformed, and the pressure in the motor chamber leaks. In addition, when the seal material 102 is increased in size, there arises a problem that leakage through the seal material 102 itself increases.

The present invention has been made to solve such known technical problems, and an object thereof is to provide an electric compressor with improved sealability when a hermetic plate is attached to a partition wall on an inverter accommodation portion side.

Solution to Problems

The electric compressor according to the present invention includes a motor chamber in which a motor is built, an inverter accommodation portion to which an inverter that supplies power to the motor is attached, a partition wall between the motor chamber and the inverter accommodation portion, a hermetic plate attached to the partition wall on an inverter accommodation portion side, and a plurality of hermetic pins penetrating the hermetic plate and attached to the hermetic plate, each hermetic pin passes a penetration hole formed in the partition wall with the hermetic plate attached to the partition wall, and is provided from the inverter accommodation portion to the motor chamber, an individual insulator is attached around each hermetic pin on a motor chamber side, and a seal material is interposed between the hermetic plate and the partition wall so as to surround the plurality of hermetic pins and the penetration holes.

In the electric compressor according to the invention of claim 2, each hermetic pin is attached to a through-hole formed in the hermetic plate via a glass, and the insulator is attached in pressure contact with the periphery of each hermetic pin on the motor chamber side with respect to the glass.

In the electric compressor according to the invention of claim 3, a recess corresponding to an insulator attached to each hermetic pin is formed around the through-hole in a face of the hermetic plate on the motor chamber side, and insulating resin located between each insulator and the hermetic plate is applied to the inside of each recess.

In the electric compressor according to the invention of claim 4, in claim 2 or claim 3, a projection is formed around each through-hole on a face of the hermetic plate opposite to the face on the motor chamber side, and a silicon member is applied so as to cover each projection.

Effects of Invention

According to the present invention, the electric compressor includes the motor chamber in which the motor is built, the inverter accommodation portion to which the inverter that supplies power to the motor is attached, the partition wall between the motor chamber and the inverter accommodation portion, the hermetic plate attached to the partition wall on the inverter accommodation portion side, and the plurality of hermetic pins penetrating the hermetic plate and attached to the hermetic plate, each hermetic pin passes the penetration hole formed in the partition wall with the hermetic plate attached to the partition wall, and is provided from the inverter accommodation portion to the motor chamber, the insulator is individually attached around each hermetic pin on the motor chamber side, and the seal material is interposed between the hermetic plate and the partition wall so as to surround the plurality of hermetic pins and the penetration holes. Thus, the position of the seal material that seals between the hermetic plate and the partition wall when the hermetic plate is attached to the partition wall on the inverter accommodation portion side can be located closer to the inside, and the size of the seal material can be reduced.

As a result, the pressure receiving area of the hermetic plate that receives the pressure on the motor chamber side can be reduced, and deformation of the hermetic plate can be reduced. In addition, leakage through the seal material itself can also be reduced, so that the sealability between the hermetic plate and the partition wall can be significantly improved as a whole.

Here, the hermetic pin is attached to the through-hole formed in the hermetic plate via the glass. In this case, as in the invention of claim 2, the insulator is attached in pressure contact with the periphery of the hermetic pin on the motor chamber side with respect to the glass, so that the seal material can be located much closer to the inside to reduce the pressure receiving area of the hermetic plate.

As in the invention of claim 3, the recess corresponding to the insulator attached to each hermetic pin is formed around the through-hole in the face of the hermetic plate on the motor chamber side, and the insulating resin located between each insulator and the hermetic plate is applied into each recess. Thus, it is possible to further improve the sealability and insulating properties of the portion on the motor chamber side, where the hermetic pin penetrates the hermetic plate.

Further, as in the invention of claim 4, since the projection is formed around the through-hole on the face of the hermetic plate opposite to the face on the motor chamber side, and the silicon member is applied so as to cover each projection, the insulating properties and the sealability around the hermetic pin on the inverter accommodation portion side can be improved.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic sectional side view of an electric compressor of an embodiment to which the present invention is applied.

FIG. 2 is a detailed sectional view of a hermetic plate of the electric compressor of FIG. 1.

FIG. 3 is an enlarged sectional view of the hermetic plate of FIG. 2.

FIG. 4 is a plan view of the hermetic plate of FIG. 2 as viewed from an inverter accommodation portion side.

FIG. 5 is a plan view of a partition wall in a state in which the hermetic plate is removed from the state of FIG. 4.

FIG. 6 is a plan view showing a positional relationship between a seal material and the hermetic plate shown in FIG. 5 as viewed from one face side of the hermetic plate.

FIG. 7 is a view showing a positional relationship between a hermetic plate and a seal material in a case of using an integrated insulator.

DESCRIPTION OF EMBODIMENTS

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic sectional side view of an electric compressor 1 of an embodiment to which the present invention is applied.

The electric compressor 1 of the embodiment is used, for example, in a refrigerant circuit of an air-conditioning device for an electric vehicle, and sucks and compresses refrigerant as working fluid for the air-conditioning device, and discharges the refrigerant into a discharge pipe. The electric compressor 1 is what is called a horizontal inverter-integrated scroll electric compressor including a motor 2 (three-phase electric motor), an inverter 3 for operating the motor 2, and a scroll compression mechanism 4 as a compression mechanism driven by the motor 2.

The electric compressor 1 of the embodiment includes a stator housing 7 accommodating the motor 2 and a center casing 6 therein, an inverter case 8 attached to a one-end-side end wall 7A (partition wall in the present invention) of the stator housing 7 and accommodating the inverter 3 therein, and a rear casing 9 attached to the other end side of the stator housing 7.

The stator housing 7, the inverter case 8, and the rear casing 9 are all made of metal (aluminum in the embodiment), and are integrally joined together to form a housing 11 of the electric compressor 1 of the embodiment.

A motor chamber 12 accommodating the motor 2 is formed in the stator housing 7, and one end face of the motor chamber 12 is basically closed with the end wall 7A of the stator housing 7. The end wall 7A serves as the partition wall defining the motor chamber 12 and an inverter accommodation portion 13 to be described later. The other end face of the motor chamber 12 is opened, and the center casing 6 is accommodated in the opening after the motor 2 has been accommodated. Moreover, a secondary bearing 16 for rotatably supporting one end portion of a drive shaft 14 of the motor 2 is attached on the inner face (motor chamber 12 side) of the end wall 7A.

The center casing 6 is opened on a side (other end side) opposite to the motor 2. After a movable scroll 22, which will be described below, of the scroll compression mechanism 4 has been accommodated, the rear casing 9 to which a fixed scroll 21, which will also be described below, of the scroll compression mechanism 4 is fixed is fixed to the stator housing 7 to thereby close the opening.

Moreover, a penetration hole 17 into which the other end portion of the drive shaft 14 of the motor 2 is inserted is opened in the center casing 6, and a main bearing 18 rotatably supporting the other end portion of the drive shaft 14 on the scroll compression mechanism 4 side is attached on the scroll compression mechanism 4 side of the penetration hole 17 in the center casing 6.

The motor 2 includes a stator 25 around which a coil is wound and which is fixed to the inside of a peripheral wall of the stator housing 7, and a rotor 29 which rotates inside the stator 25. In addition, it is configured in such a manner that, for example, direct current from a battery (not shown) of the vehicle is converted into three-phase alternating current by the inverter 3 to be supplied to the coil of the stator 25 of the motor 2 and the rotor 29 is rotationally driven accordingly. In addition, the drive shaft 14 is fixed to the rotor 29.

Moreover, a suction port 20 is formed in the stator housing 7, and refrigerant sucked through the suction port 20 passes through the motor 2 in the stator housing 7, then flows into the center casing 6, and is sucked into a suction portion 37 outside the scroll compression mechanism 4. As a result, the motor 2 is cooled by the sucked refrigerant. Moreover, it is configured in such a manner that refrigerant compressed by the scroll compression mechanism 4 is discharged from a discharge chamber 27 to be described below into the discharge pipe of the refrigerant circuit (not shown) outside the housing 11 through a discharge port 30 formed in the rear casing 9.

The scroll compression mechanism 4 includes the above-described fixed scroll 21 and movable scroll 22. The fixed scroll 21 integrally includes a disk-shaped end plate 23, and a wrap 24 erected on a face (one face) of the end plate 23, the wrap 24 having an involute shape or a spiral shape formed of a curve close to the involute shape and being fixed to the rear casing 9 with the face, on which the wrap 24 is erected, of the end plate 23 facing the center casing 6. A discharge hole 26 is formed in the center of the end plate 23 of the fixed scroll 21, and the discharge hole 26 communicates with the discharge chamber 27 in the rear casing 9. In the drawing, reference numeral 28 denotes a discharge valve provided in an opening of the discharge hole 26 on the back (other face) side of the end plate 23.

The movable scroll 22 is a scroll that revolves relative to the fixed scroll 21, and integrally includes a disk-shaped end plate 31, a wrap 32 erected on a face (one face) of the end plate 31, the wrap 32 having an involute shape or a spiral shape formed of a curve close to the involute shape, and a boss 33 protruding from the center of the back (other face) of the end plate 31. The movable scroll 22 is disposed in such a manner that the wrap 32 faces and meshes with the wrap 24 of the fixed scroll 21 with the protruding direction of the wrap 32 facing the fixed scroll 21, and a compression chamber 34 is formed between the wraps 24, 32.

That is, the wrap 32 of the movable scroll 22 faces the wrap 24 of the fixed scroll 21, and meshes with the wrap 24 in such a manner that the distal end of the wrap 32 is in contact with the face of the end plate 23 and the distal end of the wrap 24 is in contact with the face of the end plate 31, and an eccentric portion 36 provided at the other end of the drive shaft 14 so as to be eccentric to the axis is fitted in the boss 33 of the movable scroll 22. In addition, it is configured in such a manner that when the drive shaft 14 is rotated together with the rotor 29 of the motor 2, then the movable scroll 22 revolves relative to the fixed scroll 21 without rotating on its axis.

Since the movable scroll 22 eccentrically revolves relative to the fixed scroll 21, the eccentric direction and contact position of each of the wraps 24, 32 move during rotation, and the compression chamber 34 having sucked the refrigerant from the above-described suction portion 37 on the outside is gradually narrowed while moving inward. As a result, the refrigerant is compressed and finally discharged from the central discharge hole 26 to the discharge chamber 27 via the discharge valve 28.

In FIG. 1, reference numeral 38 denotes an annular thrust plate. The thrust plate 38 is for dividing a back pressure chamber 39 formed between the back face of the end plate 31 of the movable scroll 22 and the center casing 6 and the suction portion 37 outside the scroll compression mechanism 4, and is located outside the boss 33 and interposed between the center casing 6 and the movable scroll 22. Moreover, reference numeral 41 denotes a sliding seal attached to the back face of the end plate 31 of the movable scroll 22 and slidably contacting the thrust plate 38. The sliding seal 41 and the thrust plate 38 divide the back pressure chamber 39 and the suction portion 37.

Moreover, reference numeral 48 denotes a centrifugal oil separator attached to the inside of the discharge chamber 27 of the rear casing 9 (housing 11), and separates lubricating oil mixed with the refrigerant discharged from the scroll compression mechanism 4 to the discharge chamber 27 from the refrigerant. An inlet port 49 is formed in the oil separator 48, and the refrigerant containing the oil having flowed through the inlet port 49 swirls in the oil separator 48, the oil is separated by the centrifugal force at this time, and the refrigerant flows from an outlet port at the upper end toward the discharge port 30 and is discharged to the discharge pipe as described above.

The rear casing 9 is formed with an oil reservoir 44 below the oil separator 48, and the oil separated from the refrigerant by the oil separator 48 flows into the oil reservoir 44 from the lower end of the oil separator 48. In the drawing, reference numeral 43 denotes a back pressure passage extending from the rear casing 9 to the center casing 6. The back pressure passage 43 is a path which causes the oil separator 48 in the discharge chamber 27 (discharge side of the scroll compression mechanism 4) in the rear casing 9 to communicate with the back pressure chamber 39, and has an orifice 50 in the embodiment. As a result, the back pressure chamber 39 is configured in such a manner that discharge pressure adjusted and reduced by the orifice 50 of the back pressure passage 43 is supplied to the back pressure chamber 39 together with the oil in the oil reservoir 44 separated by the oil separator 48.

The pressure (back pressure) in the back pressure chamber 39 generates a back pressure load which presses the movable scroll 22 against the fixed scroll 21. Under the back pressure load, the movable scroll 22 is pressed against the fixed scroll 21 against compression reaction force from the compression chamber 34 of the scroll compression mechanism 4, the contact between the wraps 24, 32 and the end plates 31, 23 is maintained, and the refrigerant can be compressed in the compression chamber 34.

On the other hand, the inverter case 8 includes a case body 10 forming the inverter accommodation portion 13 in which the inverter 3 is accommodated, and a lid member 15 closing an opening of one end face of the case body 10. The lid member 15 is attached to the case body 10 after the inverter 3 has been accommodated in the inverter accommodation portion 13.

Next, a structure around a hermetic plate 52 of the electric compressor 1 of the embodiment will be described with further reference to FIGS. 2 to 6. Note that in FIG. 2 and figures subsequent thereto, the electric compressor 1 stands with the inverter case 8 side as the upper side. FIG. 2 is a detailed sectional view of the hermetic plate 52 of the electric compressor 1, and FIG. 3 is an enlarged sectional view of the hermetic plate 52. The inverter 3 of the embodiment is configured in such a manner that a control circuit is mounted on a single circuit board 51 and a switching element, a smoothing capacitor, and the like (not shown) are connected thereto.

Here, the hermetic plate 52 includes a conductive hermetic pin 53 that supplies power from the inverter 3 to the stator 25 of the motor 2, and is attached to the end wall 7A (partition wall) of the stator housing 7 on the inverter accommodation portion 13 side. A detailed structure of the hermetic plate 52 according to FIGS. 2 and 3 is shown.

In this case, three hermetic pins 53 are attached corresponding to each phase (three phases) of the motor 2. The hermetic plate 52 is formed into a horizontally-long plate shape by pressing a metal plate, three circular through-holes 63 for attaching the hermetic pins 53 are formed side by side in a center portion in the longitudinal direction, and bolt insertion holes 72 for inserting bolts 77 to be described later are formed in both end portions in the longitudinal direction.

One face (face on the motor chamber 12 side when the hermetic plate 52 is attached to a partition wall 10A to be described later) of the hermetic plate 52 is a flat face, and an annular recess 67 is formed around each through-hole 63 in the one face. In addition, a circular columnar projection 69 is formed around each through-hole 63 on the other face (face opposite to the face on the motor chamber 12 side when the hermetic plate 52 is attached to the partition wall 10A to be described later) of the hermetic plate 52.

A circular columnar glass (insulator) 64 is fitted in the inner face of each through-hole 63, and a middle portion of each hermetic pin 53 in the longitudinal direction thereof is fitted in the glass 64. That is, each hermetic pin 53 is attached to the through-hole 63 of the hermetic plate 52 via the glass 64, and in this state, protrudes from both the one and other faces of the hermetic plate 52.

In addition, in the embodiment, a rubber insulator 66 is attached in pressure contact with the periphery (periphery of each hermetic pin 52 on the motor chamber 12 side with respect to the glass 64 when the hermetic plate 53 is attached to the partition wall 10A to be described later) of each hermetic pin 53 on the one face side of the hermetic plate 52 with respect to the glass 64. In this case, three insulators 66 are prepared independently of each other, and are individually attached around the hermetic pins 53 on the motor chamber 12 side when the hermetic plate 52 is attached to the partition wall 10A to be described later.

In a state in which each insulator 66 is attached to the hermetic pin 53, each recess 67 of the hermetic plate 52 corresponds to each hermetic pin 53. In this state, insulating resin 68 is applied in advance into each recess 67. When the insulator 66 is attached to the hermetic pin 53, the insulating resin 68 is located between the insulator 66 and the hermetic plate 52. As a result, each insulator 66 is in close contact with the insulating resin 68, and therefore, insulation and sealing between the insulator 66 and the hermetic plate 52 are made and the insulator 66 is also positioned.

Further, a silicon member 71 is applied to the other face of the hermetic plate 52. As shown in FIG. 4, the silicon member 71 is applied so as to cover all the projections 69 formed around each through-hole 63 of the hermetic plate 52, thereby insulating and reinforcing each hermetic pin 53 on the other face side of the hermetic plate 52. In addition, since the projection 69 is formed, the contact area between the silicon member 71 and the hermetic plate 52 increases, so that the silicon member 71 is more stably fixed to the hermetic plate 52.

On the other hand, an opening 54 is formed in a bottom wall 10A of the case body 10 of the inverter case 8 corresponding to the end wall 7A (partition wall) of the stator housing 7 (FIG. 1). As shown in FIG. 5, three penetration holes 73 are formed side by side in the end wall 7A (partition wall) located in the opening 54, and two bolt holes 78 are recessed in the outer face (outer face of the stator housing 7 on the inverter accommodation portion 13 side) of the end wall 7A (partition wall) on a line on which the three penetration holes 73 are arranged. In this state, the bolt holes 78 are located on both sides of the three penetration holes 73 (FIG. 5).

Further, an oval groove 74 is formed in the outer face (outer face of the stator housing 7 on the inverter accommodation portion 13 side) of the end wall 7A (partition wall) located between the three penetration holes 73 and each bolt hole 78, and surrounds the three penetration holes 73. Then, a seal material 76 including an O-ring is disposed in the groove 74.

With the configuration above, when the hermetic plate 52 is attached to the end wall 7A (partition wall) of the stator housing 7, first, the seal material 76 is disposed in the groove 74. Next, the hermetic pins 53, the insulators 66, and the like are attached as shown in FIG. 3, and the hermetic pins 53 and the insulators 66 are inserted into the penetration holes 73 with one face side of the assembled hermetic plate 52 on the end wall 7A (partition wall) side. Note that each penetration hole 73 is formed in advance corresponding to the position of each hermetic pin 53.

The hermetic plate 52 is attached to the end wall 7A (partition wall) by inserting the bolts 77 into the bolt insertion holes 72 and screwing the bolts 77 into the bolt holes 78 of the end wall 7A (partition wall). Then, the inverter case 8 is attached to the end wall 7A (partition wall) of the stator housing 7. That is, the hermetic plate 52 is attached to the end wall 7A (partition wall) on the inverter accommodation portion 13 side.

In this state, the seal material 76 is interposed between the hermetic plate 52 and the end wall 7A (partition wall) so as to surround the three hermetic pins 53 and the three penetration holes 73, and is in close contact with both the hermetic plate 52 and the end wall 7A (partition wall) to seal therebetween. In addition, in a state in which the inverter case 8 is attached to the end wall 7A of the stator housing 7, the hermetic plate 52 and the hermetic pins 53 are located in the opening 54 of the inverter case 8 and face the inverter accommodation portion 13.

Each hermetic pin 53 passes through each penetration hole 73 and is provided from the inverter accommodation portion 13 to the motor chamber 12, each hermetic pin 53 at the portion to which the insulator 66 is attached protrudes into the motor chamber 12, and the opposite portion thereof stands in the inverter accommodation portion 13.

A high-voltage connector 62 connected to the coil of the stator 25 of the motor 2 is electrically connected to a distal end portion of each hermetic pin 53, which is provided as described above, on the motor chamber 12 side (FIG. 1). In this state, part of each insulator 66 enters the high-voltage connector 62 as shown in FIG. 2, and insulates the hermetic pins 53 from each other.

Further, the circuit board 51 is then attached to the inside of the inverter accommodation portion 13, and at this time, three metal press-fit terminals 56 called power baskets are attached to the circuit board 51 at positions corresponding to the distal end portions of the hermetic pins 53 on the inverter accommodation portion 13 side (FIG. 1). Then, when the circuit board 51 is attached to the inside of the inverter accommodation portion 13, the distal end portion of each hermetic pin 53 on the inverter accommodation portion 13 side enters each press-fit terminal 56, and is pressed (press-fitted) against the press-fit terminal 56. As a result, each hermetic pin 53 is electrically connected to the circuit board 51, and the circuit board 51 and the motor 2 are connected via the hermetic pins 53.

As described above in detail, in the present invention, the insulator 66 is individually attached to the periphery of each hermetic pin 53 on the motor chamber 12 side, and the seal material 74 is interposed between the hermetic plate 52 and the end wall 7A (partition wall) so as to surround the periphery of the three hermetic pins 53 and the three penetration holes 73 of the end wall 7A (partition wall). Thus, when the hermetic plate 52 is attached to the end wall 7A (partition wall) on the inverter accommodation portion 13 side, the position of the seal material 76 for sealing between the hermetic plate 52 and the end wall 7A (partition wall) can be located closer to the inside and the size of the seal material 76 can be reduced as shown in FIG. 6 as compared to a case of using an integrated insulator (FIG. 7).

As a result, the pressure receiving area (area where the pressure is applied to one face of the hermetic plate 52, region indicated by A in FIG. 6) of the hermetic plate 52 that receives the pressure on the motor chamber 12 side via the penetration holes 73 can be reduced, and deformation of the hermetic plate 52 can be reduced. In addition, leakage through the seal material 76 itself can also be reduced, so that the sealability between the hermetic plate 52 and the end wall 7A (partition wall) can be significantly improved as a whole.

In addition, in the embodiment, since the insulator 66 is attached in pressure contact with the periphery of the hermetic pin 66 on the motor chamber 12 side with respect to the glass 64, it is possible to reduce the pressure receiving area A of the hermetic plate 52 by locating the seal material 76 much closer to the inside.

In the embodiment, the recess 67 corresponding to the insulator 66 attached to each hermetic pin 53 is formed around the through-hole 63 in the face of the hermetic plate 52 on the motor chamber 12 side, and the insulating resin 68 located between each insulator 66 and the hermetic plate 52 is applied into each recess 67. Thus, it is possible to further improve the sealability and insulating properties of the portion on the motor chamber 12 side, where the hermetic pin 53 penetrates the hermetic plate 52.

Further, in the embodiment, since the projection 69 is formed around the through-hole 63 in the face of the hermetic plate 52 opposite to the face on the motor chamber 12 side, and the silicon member 71 is applied so as to cover each projection 69, the insulating properties and the sealability around the hermetic pin 66 on the inverter accommodation portion 13 side can also be improved.

Note that in the embodiment, the structure in which the three hermetic pins 53 are provided has been described, but the present invention is not limited thereto, and in a case where the motor 2 has more phases, more hermetic pins are provided accordingly. The specific shape of each member described in the embodiment is not limited to above, and it goes without saying that such a shape can be changed without departing from the gist of the present invention. Further, in the embodiment, the present invention has been described as the scroll type electric compressor, but the present invention is not limited thereto, and the present invention is effective for each type of electric compressor such as a rotary type.

LIST OF REFERENCE SIGNS

• • 1 Electric Compressor
  • 2 Motor
  • 3 Inverter
  • 4 Scroll Compression Mechanism
  • 7 Stator Housing
  • 7A End Wall (Partition Wall)
  • 8 Inverter Case
  • 11 Housing
  • 12 Motor Chamber
  • 13 Inverter Accommodation Portion
  • 51 Circuit Board
  • 52 Hermetic Plate
  • 53 Hermetic Pin
  • 56 Press-Fit Terminal
  • 62 High-Voltage Connector
  • 63 Through-Hole
  • 64 Glass
  • 66 Insulator
  • 67 Recess
  • 68 Insulating Resin
  • 69 Projection
  • 71 Silicon Member
  • 73 Penetration Hole
  • 76 Seal Material
  • 77 Bolt