Electrically driven compressor

Abstract

An electrically driven compressor capable of improving the sealing performance when a hermetic plate is mounted on the inverter accommodating portion side of a partition wall is provided. Hermetic pins 53 extend from the inverter accommodating portion 13 to a motor chamber 12 through through holes 73 formed in the end wall 7A (partition wall) in a state where the hermetic plate 52 is mounted on an end wall 7A (partition wall). Insulators 66 are separately mounted around parts of the hermetic pins 53 on the motor chamber 12 side. A sealing member 76 is provided between the hermetic plate 52 and the end wall 7A (partition wall) so as to surround the plurality of hermetic pins 53 and the through holes 73.

Description

TECHNICAL FIELD

[0001] The present invention relates to an electrically driven compressor configured such that a hermetic plate having a hermetic pin is mounted on a partition wall between a motor chamber and an inverter accommodating portion. STATE OF THE ART

[0002] For example, as a refrigerant compressor used in an air conditioner of an electric vehicle, an integral inverter type electric compressor is used, in which an inverter is mounted on an inverter housing portion formed in a casing. In this case, a motor is housed in a motor chamber of the casing, and a hermetic plate is provided on a partition wall between the motor chamber and the inverter housing portion. A circuit board of the inverter and the motor are electrically connected by three hermetic pins of the hermetic plate (see, for example, Patent Document 1).

[0003] The hermetic pins are attached to the hermetic plate via glass elements (insulating elements) for insulation, but since in Patent Document 1 the hermetic plate is attached to the motor chamber side of the partition wall, an insulator (hermetic element) is attached to the glass elements to insulate the connection portion between a high-voltage terminal of the motor and the hermetic pins. LIST OF REFERENCE DOCUMENTSPATENT DOCUMENT Patent document 1: JP 5944169 B2 Patent document 2: JP 7013402 B2 SUMMARY OF THE INVENTION OBJECT OF THE INVENTION

[0004] If the hermetic plate is mounted on the motor chamber side of the partition wall, as in Patent Document 1, the space inside the motor chamber becomes cramped. Therefore, it is conceivable to mount the hermetic plate on the inverter housing section side. However, since the motor chamber has high pressure and the inverter housing section has atmospheric pressure, sealing between the hermetic plate and the partition wall with a sealing member such as an O-ring or the like is required to prevent refrigerant leakage due to the pressure difference.

[0005] For example, if integrally formed insulators (heat insulating bodies) are used on the three hermetic pins as in Patent Document 2, this causes an increase in the size of the sealing element (O-ring) surrounding them.

[0006] This is done by Fig. 7 described in more detail. Fig. 7 shows the positional relationship between the hermetic plate and the sealing member when using the integrally formed insulator. In the view, 100 denotes a prior art hermetic plate and hermetic pins 53, with the three hermetic pins 53 being mounted side by side via unillustrated glass members. 101 denotes a rubber insulator integrally molded to fit over the three hermetic pins 53. 102 denotes a sealing member formed of an O-ring that surrounds the three hermetic pins 53 and the insulator 101.

[0007] The pressure inside the motor chamber acts on the motor chamber side surface of the hermetic plate 100 which is located inward of the sealing element 102 (area inward of the sealing element 102), and when as in Fig. 7, an integrally formed insulator 101 is used, the sealing element 102 inevitably increases in size, which is why the surface area on which pressure acts on the hermetic plate 100 (which is shown in Fig. 7). Therefore, the hermetic plate 100 deforms, causing pressure to escape from the motor chamber. Furthermore, there is the problem that as the size of the sealing element 102 increases, the pressure escaping from the sealing element 102 itself also increases.

[0008] The present invention has been made to solve this problem of the prior art, and has as its object to provide an electrically driven compressor capable of improving the sealing performance when a hermetic plate is mounted on the inverter accommodating portion side of a partition wall. SOLUTION TO THE TASK

[0009] An electrically driven compressor of the present invention comprises a motor chamber in which a motor is housed, an inverter accommodating portion to which an inverter is mounted that supplies power to the motor, a partition wall between the motor chamber and the inverter accommodating portion, a hermetic plate mounted on the inverter accommodating portion side of the partition wall, and a plurality of hermetic pins extending through the hermetic plate and attached to the hermetic plate, characterized in that, in a state of attaching the hermetic plate to the partition wall, the hermetic pins extend through through holes formed in the partition wall and are provided from the inverter accommodating portion to the motor chamber, and respective insulators are separately attached around parts of the hermetic pins on the motor chamber side.wherein a sealing member is provided between the hermetic plate and the partition wall such that it surrounds the plurality of hermetic pins and the through holes.,

[0010] An electrically driven compressor of claim 2 is characterized in that in the above invention, the hermetic pins are mounted via glass elements in through holes formed in the hermetic plate, and the insulators are mounted by pressing on the periphery of the hermetic pins on the motor chamber side with respect to the glass elements.

[0011] An electrically driven compressor of claim 3 is characterized in that, in the above invention, on the periphery of the through holes of the surface of the hermetic plate constituting the motor chamber side, respective recessed portions are formed corresponding to the insulators attached to the hermetic pins, and an insulating resin is applied inside the recessed portions to interpose between the insulators and the hermetic plate.

[0012] An electrically driven compressor of claim 4 is characterized in that in claim 2 or claim 3, respective projecting portions are formed on the periphery of the through holes of the surface opposite to the surface of the hermetic plate constituting the motor chamber side, and a silicone material is applied so as to cover the projecting portions. EFFECTS OF THE INVENTION

[0013] According to the present invention, in the electrically driven compressor comprising a motor chamber in which a motor is housed, an inverter accommodating portion to which an inverter is mounted that supplies power to the motor, a partition wall between the motor chamber and the inverter accommodating portion, a hermetic plate mounted on the inverter accommodating portion side of the partition wall, and a plurality of hermetic pins extending through the hermetic plate and attached to the hermetic plate, the hermetic pins, in a state of attaching the hermetic plate to the partition wall, extend through through holes formed in the partition wall and are provided from the inverter accommodating portion to the motor chamber, and insulators are separately attached to the periphery of the parts of the hermetic pins on the motor chamber side, respectively,wherein a sealing member is provided between the hermetic plate and the partition wall so as to surround the plurality of hermetic pins and the through holes; when the hermetic plate is mounted on the inverter receiving portion side of the partition wall, the position of a sealing member that creates a seal between the hermetic plate and the partition wall is shifted inward, whereby its size can be reduced.

[0014] In this way, the pressurized surface of the hermetic plate, which is subjected to pressure on the motor chamber side, is reduced, thus preventing deformation of the hermetic plate. Since the pressure escaping from the sealing element itself can also be reduced, the overall tightness between the hermetic plate and the partition wall can be significantly improved.

[0015] In this case, the hermetic pins are mounted via glass elements in through holes formed in the hermetic plate, and in this case, as in the invention of claim 2, by pressing the insulators onto the periphery of the hermetic pins on the motor chamber side with respect to the glass elements, the sealing element can be displaced even further inward and a further reduction of the pressurized surface of the hermetic plate can be achieved.

[0016] As in claim 3, when respective recessed portions corresponding to the insulators attached to the hermetic pins are formed on the periphery of the through holes of the surface of the hermetic plate constituting the motor chamber side, and an insulating resin is applied inside the recessed portions to interpose between the insulators and the hermetic plate, the tightness and insulation at the parts on the motor chamber side where the hermetic pins pass through the hermetic plate can be further improved.

[0017] Furthermore, as in claim 4, by forming respective protruding portions on the periphery of the through holes of the surface opposite to the surface of the hermetic plate constituting the motor chamber side, and applying a silicone material so as to cover the protruding portions, the insulation and tightness around the hermetic pins on the inverter accommodating portion side can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] They show: Fig. 1 is a schematic sectional view of an electrically driven compressor according to an embodiment of the present invention to which the present invention has been applied; Fig. 2 a detailed sectional view of a part of a hermetic plate of the electrically driven compressor of Fig. 1; Fig. 3 an enlarged sectional view of the hermetic plate of Fig. 2; Fig. 4 a top view of the hermetic plate from Fig. 2 from the side of the inverter receiving section; Fig. 5 a plan view of a partition wall of Fig. 4 with the hermetic plate removed; Fig. 6 is a plan view of a side surface of the hermetic plate for explaining the positional relationship between a Fig. 5 shown sealing element and the hermetic plate; and Fig. 7 is an explanatory view of the positional relationship between the hermetic plate and the sealing member in the case of using an integrally formed insulator. DESCRIPTION OF THE EMBODIMENTS

[0019] An embodiment of the present invention will be described in detail below based on the accompanying figures. Fig. 1 is a schematic sectional view of an electrically driven compressor 1 according to an embodiment of the present invention to which the present invention has been applied.

[0020] The electrically driven compressor 1 of the embodiment is used, for example, in a refrigerant cycle of an air conditioning device of an electrically driven vehicle and sucks in refrigerant as a working fluid of the air conditioning device, compresses it, and discharges it to a discharge line, and is a so-called horizontally arranged electrically driven scroll compressor with an integral inverter, which includes a motor 2 (three-phase electric motor), an inverter 3 for driving the motor 2, and a scroll compression mechanism 4 driven by the motor 2.

[0021] The electrically driven compressor 1 of the embodiment includes a stator case 7 accommodating the motor 2 and a center case 6, an inverter case 8 attached to an end wall 7A (partition wall of the present invention) on one end side of the stator case 7 and accommodating the inverter 3, and a rear case 9 attached to the other end side of the stator case 7.

[0022] The stator housing 7, the inverter housing 8 and the rear housing 9 are each made of metal (in the embodiment, aluminum), and by integrally connecting them, the housing 11 of the electrically driven compressor 1 of the embodiment is formed.

[0023] A motor chamber 12 is formed inside the stator housing 7, which accommodates the motor 2. One end surface of the motor chamber 12 is generally closed by an end wall 7A of the stator housing 7. The end wall 7A is a partition wall separating the motor chamber 12 and an inverter accommodating portion 13. The other end surface of the motor chamber 12 is open, and after accommodating the motor 2, the center housing 6 is accommodated through this opening. A subshaft bearing 16 is mounted on the inner surface of the end wall 7A (on the motor chamber 12 side) to rotatably support one end portion of a drive shaft 14 of the motor 2.

[0024] A side of the central housing 6 facing away from the motor 2 (other end side) is opened, and when a movable scroll 22 of the scroll compression mechanism 4 described below has been received through this opening, the rear housing 9, to which a stationary scroll 21 of the scroll compression mechanism 4, also described below, is fixed, is fixed to the stator housing 7 and closes it.

[0025] A through hole 17 is provided on the central housing 6 through which the other end portion of the drive shaft 14 of the motor 2 is passed, and a main shaft bearing 18 is mounted in the central housing 6 on the through hole 17 side on the scroll compression mechanism 4 side, which rotatably supports the other end portion of the drive shaft 14 on the scroll compression mechanism 4 side.

[0026] The motor 2 is formed of a stator 25, around which a coil is wound and which is fixed to the inner peripheral wall of the stator housing 7, and a rotor 29 rotating on the inner side of the stator housing 7. For example, when direct current from a vehicle battery (not shown) is converted into three-phase current by the inverter 3 and the coil of the stator 25 of the motor 2 is supplied with current, the rotor 29 is driven to rotate. The drive shaft 14 is fixed to the rotor 29.

[0027] A suction port 20 is formed on the stator housing 7, and refrigerant sucked through the suction port 20 passes through the motor 2 in the stator housing 7, flows into the central housing 6, and is then sucked into a suction portion 37 on the outside of the scroll compression mechanism 4. Thus, the motor 2 is cooled by sucked refrigerant. Refrigerant compressed by the scroll compression mechanism 4 is discharged from a discharge chamber 27 described below from a discharge port 30 formed in the rear housing 9 to a discharge line of a refrigerant circuit (not shown) outside the housing 11.

[0028] The scroll compression mechanism 4 is constituted by the stationary scroll 21 and the movable scroll 22. The stationary scroll 21 integrally includes a circular disk-shaped end plate 23 and a spiral coil 24 formed by an involute-shaped or approximately involute curve extending from the surface (one face) of the end plate 23. The surface of the end plate 23 on which the coil 24 extends is fixed to the rear housing 9 as a side of the center housing 6. A discharge hole 26 is formed in the center of the end plate 23 of the stationary scroll 21, and the discharge hole 26 communicates with the discharge chamber 27 in the rear housing 9. Reference numeral 28 denotes a discharge valve provided at an opening on the rear side (other face) of the end plate 23 at the discharge hole 26.

[0029] The movable scroll 22 is a scroll that orbits with respect to the stationary scroll 21 and integrally comprises a round disk-shaped end plate 31, a spiral wrap 32 formed by an involute-shaped or approximately involute curve projecting from the surface (one face) of the end plate 31, and a boss 33 projecting centrally from the back surface (other face) of the end plate 31. In the movable scroll 22, the wrap 32 is opposite to the wrap 24 of the stationary scroll 21, the projecting direction of the wrap 32 being the side with the stationary scroll 21, and they are arranged in an intermeshing manner, and a compression chamber 34 is formed between the wraps 24, 32.

[0030] That is, the turn 32 of the movable scroll 22 faces the turn 24 of the stationary scroll 21, and they are engaged with each other such that the front end of the turn 32 contacts the surface of the end plate 23 and the front end of the turn 24 contacts the surface of the end plate 31. An eccentric portion 36 is fitted to the boss 33 of the movable scroll 22 and is provided at the other end of the drive shaft 14 offset from the axis center. The movable scroll 22 is configured such that it does not rotate when the drive shaft 14 is rotated together with the rotor 29 of the motor 2, but instead orbits the stationary scroll 21.

[0031] Since the movable scroll 22 performs an eccentric orbital motion with respect to the stationary scroll 21, the contact position of the coils 24, 32 moves eccentrically while rotating, and the compression chamber 34 containing the refrigerant drawn in from the suction portion 37 gradually decreases in size as it moves 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.

[0032] In Fig. 1, 38 denotes an annular thrust plate. The thrust plate 38 partitions a back pressure chamber 39 formed between the rear surface of the end plate 31 of the movable scroll 22 and the center housing 6 and the suction portion 37 on the outside of the scroll compression mechanism 4, lies on the outside of the boss 33, and is provided between the center housing 6 and the movable scroll 22. 41 denotes a sealing member attached to the rear surface of the end plate 31 of the movable scroll 22 and is a sliding seal slidably abutting the thrust plate 38, and the back pressure chamber 39 and the suction portion 37 are partitioned by this sliding seal 41 and the thrust plate 38.

[0033] 48 denotes a centrifugal oil separator mounted in the discharge chamber 27 of the rear housing 9 (casing 11) for separating lubricating oil mixed with the refrigerant discharged into the discharge chamber 27 by the scroll compression mechanism 4 from the refrigerant. An inlet port 49 is formed in the oil separator 48, and the oil-containing refrigerant flowing in through this inlet port 49 is swirled in the oil separator 48. The oil is separated by the centrifugal force acting thereon, and the refrigerant moves through an outlet port at the upper end to the discharge port 30 and is discharged to the discharge line as discussed.

[0034] An oil collection chamber 44 is formed below the oil separator 48 in the rear housing 9, and the oil separated from the refrigerant in the oil separator 48 flows from the lower end of the oil separator 48 into the oil collection chamber 44. Reference numeral 43 denotes a backpressure channel formed extending from the rear housing 9 to the central housing 6. The backpressure channel 43 is a passage that connects the oil separator 48 in the discharge chamber 27 in the rear housing 9 (on the discharge side of the scroll compression mechanism 4) and the backpressure chamber 39, and in the exemplary embodiment has a nozzle 50. In this way, the backpressure chamber 39, together with the oil separated at the oil separator 48 from the oil collection chamber 44, is subjected to the discharge pressure regulated by the nozzle 50 of the backpressure channel 43.

[0035] This counterforce (backpressure) in the backpressure chamber 39 generates a backpressure load that presses the movable scroll 22 against the stationary scroll 21. The backpressure load presses the movable scroll 22 against the backpressure from the compression chamber 34 of the scroll compression mechanism 4 against the stationary scroll 21, so that contact between the coils 24, 32 and the end plates 31, 23 is maintained and the refrigerant in the compression chamber 34 can be compressed.

[0036] The converter housing 8, in turn, is formed by a housing base body 10, which forms the converter receiving section 13 for receiving the converter 3, and a cover element 15 that closes an opening on an end surface of the housing base body 10. The cover element 15 is attached to the housing base body 10 after the converter 3 has been received in the converter receiving section 13.

[0037] Next, with reference to Fig. 2 to 6, the detailed structure of the surroundings of a hermetic plate 52 of the electrically driven compressor 1 is described. Fig. 2 shows a state in which the electrically driven compressor 1 is stationary so that the side of the converter housing 8 is at the top. Fig. Figure 2 is a detailed sectional view of a portion of the hermetic plate 52 of the electrically driven compressor of Fig. 1 and Fig. 3 is an enlarged sectional view of the hermetic plate 52. The inverter 3 of the embodiment is formed by mounting a control circuit on a circuit board 51 and connecting unillustrated switching elements, smoothing capacitors, and the like.

[0038] The hermetic plate 52 includes electrically conductive hermetic pins 53 that supply power to the stator 25 of the motor 2 from the inverter 3, and is mounted on the side of the inverter receiving portion 13 of the end wall 7A (partition wall) of the stator housing 7. The detailed structure of the hermetic plate 52 is shown in FIG. Fig. 2 and Fig. 3 shown.

[0039] In this case, hermetic pins 53 are mounted corresponding to the phases of the motor 2 (three phases). The hermetic plate 52 is formed into an elongated plate by press-working a sheet metal, with through holes 63 for attaching the hermetic pins 53 side by side formed at three locations in its longitudinally central portion, and bolt through holes 72 for passing bolts 77 described below formed at both longitudinal end portions.

[0040] One surface of the hermetic plate 52 (the surface on the motor chamber 12 side when the hermetic plate 52 is attached to a partition wall 10A as described below) is a flat surface, and an annular recessed portion 67 is formed around each of the through-holes 63 of this one surface. A columnar protruding portion 69 is formed around each of the through-holes 63 of the other surface of the hermetic plate 52 (the surface opposite the surface on the motor chamber 12 side when the hermetic plate 52 is attached to the partition wall 10A as described below).

[0041] A columnar glass member (insulating member) 64 is inserted into the inner surfaces of each of the through-holes 63, with a central portion in the longitudinal direction of the hermetic pins 53 being inserted into the interior of each of these glass members 64. This results in a shape in which the hermetic pins 53 are mounted in the through-holes 63 of the hermetic plate 52 via the glass members 64 and, in this state, protrude from both the one and the other surfaces of the hermetic plate 52.

[0042] In the present embodiment, rubber insulators 66 are press-attached to a periphery of the hermetic pins 53 that is wider than the glass elements 64 on the one surface side of the hermetic plate 52 (the periphery of the hermetic pins 53 that is wider than the glass elements 64 on the motor chamber 12 side when the hermetic plate 52 is attached to the partition wall 10A as described below). In this case, three insulators 66 are separately prepared and individually attached to the periphery of the hermetic pins 53 at the parts that are on the motor chamber 12 side when the hermetic plate 52 is attached to the partition wall 10A as described below.

[0043] When the insulators 66 are attached to the hermetic pins 53, the recessed portions 67 of the hermetic plate 52 are respectively aligned with the hermetic pins 53. Next, an insulating resin 68 is preliminarily applied inside the recessed portions 67. Then, the insulating resin 68 is caused to lie between the insulators 66 and the hermetic plate 52 when the insulators 66 are attached to the hermetic pins 53. Since the insulators 66 adhere to the insulating resin 68 in this way, insulation and sealing are formed between the insulators 66 and the hermetic plate 52, and positioning of the insulators 66 is also performed.

[0044] A silicone material 71 is applied to the other surface of the hermetic plate 52. The silicone material 71 is, as in Fig. 4, is applied so as to completely cover the protruding portions 69 formed on the periphery of the through-holes 63 of the hermetic plate 52, thereby insulating and reinforcing the hermetic pins 53 on the other surface side of the hermetic plate 52. By forming the protruding portions 69, the contact surface area between the silicone material 71 and the hermetic plate 52 increases, and therefore the silicone material 71 adheres more stably to the hermetic plate 52.

[0045] In a bottom wall 10A of the housing base body 10 of the converter housing 8, which corresponds to the end wall 7A (partition wall) of the stator housing 7, an opening 54 is formed ( Fig. 1). In the end wall 7A (partition wall), which will later be located inside the opening 54, as shown in Fig. 5, three through holes 73 are formed side by side, and on an outer surface (outer surface of the stator housing 7 on the side of the inverter receiving section 13) of the end wall 7A (partition wall) in line with the three adjacent through holes 73, bolt holes 78 are formed at two locations. There is a bolt hole 78 on each side of the three through holes 73 ( Fig. 5).

[0046] On the outer surface (outer surface of the stator housing 7 on the inverter housing portion 13 side) of the end wall 7A (partition wall) of the portion located between the three through holes 73 and the bolt holes 78, an elliptical groove 74 is formed, forming a shape surrounding the three through holes 73. A sealing element 76 formed as an O-ring is disposed in this groove 74.

[0047] In this embodiment, when the hermetic plate 52 is attached to the end wall 7A (partition wall) of the stator housing 7, the sealing element 76 is first arranged in the groove 74. Next, as shown in Fig. 3, the hermetic pins 53 and the insulators 66 are attached, and in a state where the side of one surface of the assembled hermetic plate 52 is brought to the end wall 7A (partition wall) side, the hermetic pins 53 and the insulators 66 are inserted into the respective through holes 73. The through holes 73 are respectively formed in advance at the positions of the hermetic pins 53.

[0048] Then, the bolts 77 are inserted into the bolt holes 72 and screwed into the bolt holes 78 of the end wall 7A (partition wall), thereby attaching the hermetic plate 52 to the end wall 7A (partition wall). Then, the inverter housing 7 is attached to the end wall 7A (partition wall) of the stator housing 8. Thus, the hermetic plate 52 is attached to the inverter receiving portion 13 side of the end wall 7A (partition wall).

[0049] In this state, the sealing member 76 is arranged between the hermetic plate 52 and the end wall 7A (partition wall), surrounding the three hermetic pins 53 and the three through holes 73, and tightly abuts both the hermetic plate 52 and the end wall 7A (partition wall), creating a seal between them. When the inverter housing 8 is attached to the end wall 7A of the stator housing 7, the hermetic plate 52 and the hermetic pins 53 are located inside the opening 54 of the inverter housing 8 and face toward the interior of the inverter receiving portion 13.

[0050] This results in a shape in which the hermetic pins 53 pass through the through holes 73 and are provided from the inverter receiving portion 13 to the motor chamber 12, the hermetic pins 53 of the part to which the insulators 66 are attached project into the interior of the motor chamber 12 and the opposite part projects into the interior of the inverter receiving portion 13.

[0051] The high-voltage terminal 62 ( Fig. 1) is electrically connected to the front end portions of the thus provided hermetic pins 53 on the side of the motor chamber 12. At this time, a part of the insulators 66 penetrates as shown in Fig. 2 into the high voltage terminal 62 and insulates the individual hermetic pins 53 from each other.

[0052] The printed circuit board 51 is then mounted inside the inverter receiving section 13, and three metal press-fit terminals 56 called power baskets are mounted on the printed circuit board 51 at positions corresponding to the front end portions of the hermetic pins 53 on the side of the inverter receiving section 13 ( Fig. 1). When the circuit board 51 is mounted in the inverter receiving section 13, the front end portions of the hermetic pins 53 on the inverter receiving section 13 side are respectively inserted into the press-fit terminals 56 and pressed (driven) into the press-fit terminals 56. This electrically connects the hermetic pins 53 to the circuit board 51, and the circuit board 51 and the motor 2 are connected to each other via the hermetic pins 53.

[0053] In the present invention, as described in detail above, since the insulators 66 are each separately mounted on the periphery of the parts of the hermetic pins 53 on the motor chamber 12 side, and the sealing member 74 is provided between the hermetic plate 52 and the end wall 7A (partition wall) so as to surround the three hermetic pins 53 and the three through holes 73 of the end wall 7A (partition wall), when the hermetic plate 52 is mounted on the inverter receiving portion 13 side of the end wall 7A (partition wall), the position of the sealing member 76 that creates a seal between the hermetic plate 52 and the end wall 7A (partition wall) is reduced compared to using an integrally formed insulator ( Fig. 7) as in Fig. 6 shown, which allows its size to be reduced.

[0054] In this way, the pressurized surface of the hermetic plate 52, which is pressurized through the through-holes 73 on the side of the motor chamber 12 (surface on which pressure is applied to one surface of the hermetic plate 52, in Fig. 6 at A), so that deformation of the hermetic plate 52 can be prevented. Since the pressure escaping at the sealing element 76 itself can also be reduced, the overall tightness between the hermetic plate 52 and the end wall 7A (partition wall) can be significantly improved.

[0055] Since the insulators 66 in the embodiment are attached by pressing on the circumference of the hermetic pins 66 on the side which is located near the motor chamber 12 with respect to the glass element 64, the sealing element 76 can be displaced even further inward and a further reduction of the pressurized surface A of the hermetic plate 52 can be achieved.

[0056] In the embodiment, since the respective recessed portions 67 corresponding to the insulators 66 attached to the hermetic pins 53 are formed on the periphery of the through holes 63 of the surface of the hermetic plate 52 forming the motor chamber 12 side, and the insulating resin 68 interposed between the insulators 66 and the hermetic plate 52 is applied inside the recessed portions 67, the sealing and insulation at the parts on the motor chamber 12 side where the hermetic pins 53 pass through the hermetic plate 52 can be further improved.

[0057] Furthermore, in the embodiment, by forming the respective protruding portions 69 on the periphery of the through holes 63 of the surface opposite to the surface of the hermetic plate 52 constituting the motor chamber 12 side, and applying the silicone material 71 so as to cover the protruding portions 69, the insulation and sealing around the hermetic pins 66 on the inverter accommodating portion 13 side can be improved.

[0058] In the exemplary embodiment, a structure with three hermetic pins 53 was described, but this is not limited to this, and more hermetic pins may be provided with a larger number of phases of the motor 2. Also, the specific shape of the individual elements shown in the exemplary embodiment is not limited; these can of course be changed as long as the essence of the invention is not deviated from. In the exemplary embodiment, the present invention was described using an electrically driven scroll compressor, but this is not limited to this, and the present invention also applies to electrically driven compressors of other shapes, such as rotary compressors. LIST OF REFERENCE SYMBOLS 1 Electrically driven compressor 2 engines 3 inverters 4 Scroll compression mechanism 7 Stator housing 7A End wall (partition wall) 8 Converter enclosure 11 housings 12 engine chamber 13 Inverter mounting section 51 circuit board 52 hermetic plate 53 hermetic pen 56 press fit connection 62 High-voltage connection 63 through hole 64 glass element 66 Insulator 67 Advanced Section 68 insulating resin 69 preceding section 71 silicone material 73 through hole 76 Sealing element 77 bolts QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 5944169 B2

[0003] JP 7013402 B2

[0003]

Claims

[1] An electrically driven compressor comprising a motor chamber in which a motor is housed, an inverter receiving portion to which an inverter is mounted that supplies power to the motor, a partition wall between the motor chamber and the inverter receiving portion, a hermetic plate mounted on the inverter receiving portion side of the partition wall, and a plurality of hermetic pins passing through the hermetic plate and mounted on the hermetic plate, characterized byin that the hermetic pins, in a state of attaching the hermetic plate to the partition wall, pass through through holes formed in the partition wall and are provided from the inverter accommodating portion to the motor chamber, wherein respective insulators are separately attached around parts of the hermetic pins on the motor chamber side, wherein a sealing member is provided between the hermetic plate and the partition wall so as to surround the plurality of hermetic pins and the through holes. [2] Electrically driven compressor according to claim 1, characterized by that the hermetic pins are mounted via glass elements in through holes formed in the hermetic plate, and the insulators are mounted by pressing on the periphery of the hermetic pins lying on the motor chamber side with respect to the glass elements. [3] Electrically driven compressor according to claim 2, characterized bythat on the periphery of the through holes of the surface of the hermetic plate forming the side of the motor chamber, respective recessed portions are formed which correspond to insulators attached to the hermetic pins, wherein an insulating resin is applied inside the recessed portions and lies between the insulators and the hermetic plate. [4] Electrically driven compressor according to claim 2 or 3, characterized by that respective protruding portions are formed on the periphery of the through holes of the surface opposite to the surface of the hermetic plate forming the side of the motor chamber, wherein a silicone material is applied so as to cover the protruding portions.

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