Inverter-integrated electric compressor

Abstract

To provide an inverter-integrated electric compressor that can prevent cracking of a hermetic plate and can reduce dimensions and weight.SOLUTION: An inverter integrated electric compressor 1 includes a motor chamber 12 in which an electric motor 2 is built, an inverter accommodating part 13 in which an inverter 3 that feeds power to the electric motor 2 is attached, and a hermetic plate 52 provided on a separating wall 7A between the motor chamber 12 and the inverter accommodating part 13. A hermetic pin 53 of the hermetic plate 52 is connected to a circuit substrate 51 of the inverter 3 via a connection terminal 54. A through-hole 56 is provided on the circuit substrate 51 and through which the connection terminal 54 and the hermetic pin 53 penetrate.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an inverter-integrated electric compressor in which an inverter is attached to an inverter housing section.

Background Art

[0002] Conventionally, as an electric compressor used in a vehicle air conditioner, an inverter-integrated electric compressor in which an inverter is attached to an inverter housing section formed in a housing has been used in consideration of switching noise (see, for example, Patent Document 1). In this case, a motor is housed in a motor chamber of the housing, and a glass hermetic plate is provided on a partition wall between the motor chamber and the inverter housing section. And, a configuration was adopted in which a hermetic pin of this hermetic plate and a circuit board of the inverter were connected by a connection terminal.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional structure, due to variations in the position of the connection terminals, when assembling the hermetic pin and the connection terminal, a load is applied to the hermetic pin, causing a problem that the glass hermetic plate cracks.

[0005] In addition, conventionally, since the connection terminal was attached to the hermetic plate via a resin component, the height of the circuit board from the partition wall increased, the height dimension of the inverter housing section expanded, and the dimensions and weight of the housing increased.

[0006] The present invention was made to solve the aforementioned conventional technical problems, and aims to provide an inverter-integrated electric compressor that can prevent cracking of hermetic plates and achieve reductions in size and weight. [Means for solving the problem]

[0007] The inverter-integrated electric compressor of the present invention comprises a motor chamber containing a motor, an inverter housing where an inverter that supplies power to the motor is mounted, and a hermetic plate provided in the partition wall between the motor chamber and the inverter housing. The hermetic pins of this hermetic plate are connected to the circuit board of the inverter via connection terminals, and the circuit board is provided with through holes formed therein through which the connection terminals and hermetic pins enter. The connector terminal has a board connection pin for connecting to the circuit board and a mating portion for connecting to the hermetic pin. The mating portion is shaped to allow changes in the position of the connector terminal relative to the hermetic pin, and is held by the circuit board when it enters the through hole. In this state, the connector terminal is movable in the planar direction of the circuit board. The circuit board has through holes through which the board connection pin is inserted, and a power basket to which the board connection pin is connected is provided in these through holes. It is characterized by the following:

[0008] Second invention The inverter-integrated electric compressor is characterized in that, in the above invention, a plurality of hermetic pins and power baskets are provided corresponding to each phase of the motor, the connection terminals are connected to each hermetic pin, and the board connection pins of each connection terminal are connected to each power basket, and the distance between each board connection pin is greater than the distance between each hermetic pin.

[0009] The third invention, an inverter-integrated electric compressor, is based on the above inventions. The connection terminal is held in a through-hole in the circuit board, and the board connection pin is connected to the power basket, while the mating portion of the connection terminal can be fitted to the hermetic pin. [Effects of the Invention]

[0010] According to the present invention, in an inverter-integrated electric compressor comprising a motor chamber containing a motor, an inverter housing where an inverter that supplies power to the motor is mounted, and a hermetic plate provided in the partition wall between the motor chamber and the inverter housing, the hermetic pins of the hermetic plate and the circuit board of the inverter are connected via connection terminals, the circuit board is configured to have through holes formed therein into which the connection terminals and hermetic pins enter, thereby avoiding interference in the height direction between the circuit board and the hermetic pins and connection terminals.

[0011] This allows the height of the circuit board from the bulkhead to be reduced, and by reducing the height of the inverter housing, the size and weight of the electric compressor can be reduced.

[0012] Furthermore, it becomes possible to avoid cracking of the hermetic plate due to variations during assembly, and to standardize the hermetic plate across different models, thereby reducing costs and development time.

[0013] Also, The connection terminal is When it enters the through hole, it enters the circuit board Since it was made to be retained, This eliminates the need for components to hold the connection terminals, thereby reducing the number of parts. Furthermore, the connection terminals, while held on the circuit board, are positioned in the planar direction of the circuit board. Since it was made movable, This design absorbs variations in the position of connection terminals relative to hermetic pins during assembly, enabling smooth assembly by automated machines.

[0014] Also, On the connection terminal, The circuit board has board connection pins for connecting to the circuit board and a mating portion for connecting to the hermetic pin, and the mating portion is shaped to allow for changes in the position of the connection terminal relative to the hermetic pin, and the circuit board has through holes through which the board connection pins are inserted, and the power basket to which the board connection pins are connected is provided in these through holes. Since we set it up During assembly The variation in the position of the connection terminal with respect to the hermetic pin is absorbed well in one phase, and stable electrical connection between the hermetic pin and the circuit board by the connection terminal can be realized even by assembly with an automatic machine.

[0015] Furthermore, The connection terminals are on the circuit board. is movable in the planar direction. Therefore, for example, even when the position of the power basket on the circuit board varies depending on the model, the deviation in the position can be absorbed by the movement of the connection terminal, and the hermetic plate can be made common among different models.

[0016] In this case, Second invention A plurality of hermetic pins and power baskets are provided corresponding to each phase of the motor. The connection terminals are respectively connected to each hermetic pin. By making the distance between the board connection pins of each connection terminal larger than the distance between each hermetic pin in the state where the board connection pins are respectively connected to each power basket, the insulation distance between the connection terminals on the circuit board side can be ensured, and it becomes possible to handle even ultra-high voltages.

[0017] Furthermore, Third Invention By making the fitting portion of the connection terminal fit to the hermetic pin in the state where the connection terminal is held in the through hole of the circuit board and the board connection pin is connected to the power basket, it becomes possible to reduce the number of personnel by assembly with an automatic machine.

Brief Description of the Drawings

[0018] [Figure 1] It is a schematic cross-sectional view of an inverter-integrated electric compressor of an embodiment to which the present invention is applied. [Figure 2] It is a plan view seen from the side of the inverter housing part excluding the cover of the electric compressor in FIG. 1. [Figure 3] It is an enlarged plan view of the connection terminal part of the circuit board of the electric compressor in FIG. 1. [Figure 4] It is an enlarged exploded perspective view of the part of the hermetic plate and the circuit board of the electric compressor in FIG. 1. [Figure 5] It is a perspective view of the connection terminal of the electric compressor of FIG. 1. [Figure 6] It is a side view of the connection terminal of FIG. 5. [Figure 7] It is a rear view of the connection terminal of FIG. 5. [Figure 8] It is a plan view of the connection terminal of FIG. 5. [Figure 9] It is a diagram for explaining the procedure of attaching the connection terminal to the circuit board of the electric compressor of FIG. 1. [Figure 10] It is an enlarged perspective view of the state where the connection terminal is attached to the circuit board of the electric compressor of FIG. 1. [Figure 11] It is a diagram for explaining the procedure of assembling the circuit board of the electric compressor of FIG. 1 into the inverter housing part. [Figure 12] It is a perspective view of a part of the inverter housing part in the state where the circuit board of the electric compressor of FIG. 1 is attached.

Embodiments for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a schematic cross-sectional view of an inverter-integrated electric compressor 1 according to an embodiment to which the present invention is applied, and FIG. 2 is a plan view seen from the side of the inverter housing part 13 excluding the cover 8 of the electric compressor 1.

[0020] The inverter-integrated electric compressor 1 of the embodiment is used, for example, in the refrigerant circuit of an air conditioner for a vehicle, sucks the refrigerant as the working fluid of the air conditioner, compresses it, and discharges it to the discharge pipe. It is a so-called horizontally placed inverter-integrated scroll compressor having a three-phase electric motor 2 as a motor in the present invention, an inverter 3 for driving this electric motor 2, and a scroll compressor mechanism 4 as a compression mechanism driven by the electric motor 2. It is a scroll compressor of the inverter-integrated type.

[0021] The electric compressor 1 in this embodiment includes a stator housing 7 that houses an electric motor 2, an inverter 3, and a center casing 6 inside, as well as a cover 8 and a rear casing 9. The stator housing 7, cover 8, and rear casing 9 are all made of metal (aluminum in this embodiment), and they are integrally joined together to form the housing 11 of the electric compressor 1.

[0022] The stator housing 7 is equipped with a partition wall 7A at one end, which divides the stator housing 7 (which constitutes part of the housing 11) into a motor chamber 12 for housing the electric motor 2 and an inverter housing section 13 for housing the inverter 3. The inverter housing section 13 has an open end, which is closed by a cover 8 fixed to the stator housing 7 (which constitutes part of the housing 11) after the inverter 3 is housed inside. The motor chamber 12 also has an open end, which houses the electric motor 2 and then the center casing 6. A sub-bearing 16 is attached to the motor chamber 12 side of the partition wall 7A to rotatably support one end (front side) of the drive shaft 14 of the electric motor 2.

[0023] The center casing 6 has an opening on the opposite side (other end) from the electric motor 2. This opening is closed when the rear casing 9, to which the fixed scroll 21 of the scroll compression mechanism 4 (also described later) is fixed, is fixed to the stator housing 7 after the movable scroll 22 of the scroll compression mechanism 4 is housed.

[0024] Furthermore, the center casing 6 has a through hole 17 through which the other end of the drive shaft 14 of the electric motor 2 is inserted, and a main bearing 18 is installed inside the center casing 6 on the scroll compression mechanism 4 side of this through hole 17 to rotatably support the other end of the drive shaft 14 on the scroll compression mechanism 4 side.

[0025] The electric motor 2 consists of a stator 22 on which coils are wound and fixed to the inside of the peripheral wall of the stator housing 7, and a rotor 23 that rotates inside the stator. For example, a DC current from the vehicle's battery (not shown) is converted into a three-phase AC current by the inverter 3 and supplied to the coils of the stator 22 of the electric motor 2, thereby driving the rotor 23 to rotate. The drive shaft 14 is fixed to this rotor 23.

[0026] Furthermore, an intake port 21 is formed in the stator housing 7. The refrigerant drawn in through the intake port 21 passes through the electric motor 2 inside the stator housing 7, flows into the center casing 6, and is drawn into the intake section 37 on the outside of the scroll compression mechanism 4. As a result, the electric motor 2 is cooled by the drawn-in refrigerant. The refrigerant compressed by the scroll compression mechanism 4 is then discharged from the discharge chamber 27 (described later) through a discharge port 20 formed in the rear casing 9 to the discharge piping of a refrigerant circuit (not shown) outside the housing 11.

[0027] The scroll compression mechanism 4 consists of the fixed scroll 21 and the movable scroll 22 described above. The fixed scroll 21 integrally includes a disc-shaped end plate 23 and a spiral-shaped wrap 24 consisting of an involute or a curved shape similar to an involute, which is erected on the surface (one side) of the end plate 23. The surface of the end plate 23 on which the wrap 24 is erected is fixed to the rear casing 9 with the center casing 6 side facing the fixed scroll 21. A discharge hole 26 is formed in the center of the end plate 23 of the fixed scroll 21, and this discharge hole 26 is in communication with a discharge chamber 27 inside the rear casing 9. In the figure, 28 is a discharge valve provided at the opening on the back (the other side) of the end plate 23 of the discharge hole 26.

[0028] The movable scroll 22 is a scroll that revolves and rotates around the fixed scroll 21, and integrally comprises a disc-shaped end plate 31, a spiral-shaped wrap 32 consisting of an involute or a similar curve erected on the surface (one side) of the end plate 31, and a boss 33 projecting from the center of the back surface (the other side) of the end plate 31. The movable scroll 22 is arranged so that the direction in which the wrap 32 protrudes faces the fixed scroll 21, with the wrap 32 facing the wrap 24 of the fixed scroll 21, and they mesh with each other, forming a pressure chamber 34 between the wraps 24 and 32.

[0029] Specifically, the wrap 32 of the movable scroll 22 faces the wrap 24 of the fixed scroll 21, and the tip of the wrap 32 contacts the surface of the end plate 23, while the tip of the wrap 24 contacts the surface of the end plate 31, thus meshing together. Furthermore, an eccentric portion 36, which is provided eccentrically from the axis at the other end of the drive shaft 14, is fitted onto the boss 33 of the movable scroll 22. When the drive shaft 14 rotates together with the rotor 23 of the electric motor 2, the movable scroll 22 is configured to revolve and orbit around the fixed scroll 21 without rotating on its own axis.

[0030] As the movable scroll 22 revolves and rotates eccentrically with respect to the fixed scroll 21, the eccentric direction and contact position of each wrap 24, 32 move while rotating, and the pressure chamber 34, which draws in refrigerant from the aforementioned intake section 37 on the outside, gradually shrinks as it moves inward. As a result, the refrigerant is compressed and finally discharged from the central discharge hole 26 through the discharge valve 28 into the discharge chamber 27.

[0031] In Figure 1, 38 is an annular thrust plate. This thrust plate 38 is for partitioning the back pressure chamber 39 formed between the back surface of the end plate 31 of the movable scroll 22 and the center casing 6, and the suction section 37 on the outside of the scroll compression mechanism 4. It is located outside the boss 33 and interposed between the center casing 6 and the movable scroll 22. Also, 41 is a sealing material attached to the back surface of the end plate 31 of the movable scroll 22 and in contact with the thrust plate 38. The back pressure chamber 39 and the suction section 37 are partitioned by this sealing material 41 and the thrust plate 38.

[0032] Furthermore, 48 is a centrifugal oil separator installed in the discharge chamber 27 of the rear casing 9 (housing 11). This oil separator 48 separates the lubricating oil mixed with the refrigerant discharged from the scroll compression mechanism 4 into the discharge chamber 27 from the refrigerant. An inlet 49 is formed in this oil separator 48, and the refrigerant containing oil that flows in through this inlet 49 swirls within the oil separator 48. The centrifugal force at this time separates the oil, and the refrigerant moves from the outlet at the upper end toward the discharge port 20 and is discharged into the discharge piping as described above.

[0033] An oil storage chamber 44 is formed in the rear casing 9 below the oil separator 48, and the oil separated from the refrigerant by the oil separator 48 flows into this oil storage chamber 44 from the lower end of the oil separator 48. In the figure, 43 is a back pressure passage formed from the rear casing 9 to the center casing 6. This back pressure passage 43 is a path that connects the oil separator 48 in the discharge chamber 27 (discharge side of the scroll compression mechanism 4) within the rear casing 9 to the back pressure chamber 39, and in the embodiment, it has an orifice 50. As a result, the discharge pressure, which has been 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 storage chamber 44 that has been separated by the oil separator 48.

[0034] The pressure (back pressure) within this back pressure chamber 39 generates a back pressure load that presses the movable scroll 22 against the fixed scroll 21. This back pressure load causes the movable scroll 22 to press against the fixed scroll 21 against the compressive reaction force from the pressure chamber 34 of the scroll compression mechanism 4, and Contact is maintained between pipes 24 and 32 and end plates 31 and 23, allowing the refrigerant to be compressed in the pressure chamber 34.

[0035] Next, with further reference to Figures 2 to 12, the structure of the inverter 3 surrounding the inverter of the embodiment-integrated electric compressor 1 will be described. The inverter 3 of the embodiment has a single circuit board 51 on which the control circuit, power switching elements, and smoothing capacitor 25 are mounted. In this case, a glass hermetic plate 52 is attached to the inverter housing section 13 side of the partition wall 7A at a position corresponding to one end of the circuit board 51, and conductive hermetic pins 53 are attached to this hermetic plate 52. In this case, three hermetic pins 53 are attached, corresponding to each phase of the electric motor 2.

[0036] One end of each hermetic pin 53 stands upright from the partition wall 7A within the inverter housing 13, while the other end penetrates the partition wall 7A and enters the motor room 12, where it is connected to the coil of the stator 22 of the electric motor 2. Each hermetic pin 53 has three connection terminals 54 attached to one end, and these connection terminals 54 are connected to the circuit board 51, thereby electrically connecting the hermetic pins 53 to the circuit board 51.

[0037] In this case, the circuit board 51 has three roughly rectangular through holes 56 into which the connection terminals 54 and hermetic pins 53 enter, as will be described later. Furthermore, at positions on the circuit board 51 that are spaced at predetermined intervals along the longitudinal direction of each through hole 56, there are three through holes 58 into which the board connection pins 57 of the connection terminals 54 (described later) are inserted. Also, as shown in Figure 2, the spacing between the through holes 58 is greater than the spacing between the ends of each through hole 56 opposite to the through holes 58. In addition, although not shown in Figure 1, a metal power basket 59 is attached to each through hole 58.

[0038] Next, the structure of the connection terminal 54 in the embodiment will be described with reference to Figures 5 to 8. The connection terminal 54 is made of a conductive metal plate and has a pair of side walls 61 and 62 that face each other with a predetermined distance between them, and connecting walls 63 and 64 that connect one end of each side wall 61 and 62 in the longitudinal direction to the middle part, and when viewed from above, each wall 61 to 64 forms a rectangular shape that is open in the vertical direction. An extended portion 66 is formed extending further from the middle part of each side wall 61 and 62 to the other end in the longitudinal direction, and the aforementioned substrate connection pin 57 is formed upright at the tip of this extended portion 66.

[0039] Each side wall 61, 62 has an outwardly bulging arc portion 61A, 62A formed by bending, so as to form an elliptical arc shape that is long in the longitudinal direction of the connection terminal 54, and the fitting portion 67 is formed by each arc portion 61A, 62A. In addition, the upper end of each connecting wall 63, 64 has outwardly projecting engaging claws 68, 69 formed thereon. Furthermore, the width of the connection terminal 54 in the short direction is set to be smaller than the width of the through hole 56 of the circuit board 51 in the short direction.

[0040] The procedure for assembling the circuit board 51 into the inverter housing 13 of the housing 11 (stator housing 7) with the above configuration will now be explained. First, with the back side of the circuit board 51 (the side that will be on each wall 7A side when assembled) facing upwards, the three connection terminals 54 are attached to each through-hole 56 from above, as shown by the arrows in Figure 9, with the board connection pins 57 facing downwards (towards the circuit board 51). At this time, the board connection pins 57 of each connection terminal 54 are inserted from the back side of the circuit board 51 into each insertion hole 58 and pressed into the power basket 59, thereby connecting them.

[0041] Furthermore, the engaging claws 68 and 69 of the connecting walls 63 and 64 of each connection terminal 54 engage with the longitudinal edge of the through hole 56 (Figure 3). In this state, each connection terminal 54 is held in place by the circuit board 51 (Figure 10). At this time, the width of the connection terminal 54 in the short direction is set to be smaller than the width of the through hole 56 of the circuit board 51 in the short direction, so that the connection terminal 54 can move in the planar direction of the circuit board 51 within the range indicated by the solid arrow in Figure 3.

[0042] With the three connection terminals 54 attached to and held in place in the respective through holes 56, the circuit board 51 is placed in the inverter housing section 13 by an automated machine with the back side (the back side of the circuit board 51) facing the housing 11, as indicated by the arrows in Figure 11, and then fixed to the housing 11 (stator housing 7) with bolts (not shown) (Figure 12).

[0043] During the process of inserting the circuit board 51 into the inverter housing 13, each hermetic pin 53 enters and engages with the mating portion 67 of each connection terminal 54 (Figure 3). In this way, each hermetic pin 53 enters the through hole 56 and simultaneously engages with the connection terminal 54, so that the hermetic pins 53 and the circuit board 51 are electrically connected via the connection terminals 54.

[0044] In this case, the mating portion 67 of the connector 54 is composed of arc portions 61A and 62A that have an elongated elliptical arc shape in the longitudinal direction of the connector 54. Therefore, even if the position of the connector 54 relative to the hermetic pin 53 changes in its longitudinal direction (the direction of the white arrow in Figure 3), the mating state between the connector 54 and the hermetic pin 53 is maintained. That is, changes in the position of the connector 54 relative to the hermetic pin 53 are permissible within the range of the long arc of the mating portion 67.

[0045] As a result, even if there are variations in the shape, dimensions, and mounting positions of the circuit board 51 and the connection terminals 54, the longitudinal variation of the connection terminals 54 is absorbed within the arc of the mating portion 67, and the short-axis variation is absorbed by the rotation of the connection terminals 54 around the board connection pins 57 within the range of the solid arrows in Figure 3.

[0046] Furthermore, as mentioned above, the spacing between each insertion hole 58 is set to be greater than the spacing between the ends of each through hole 56 opposite to the insertion hole 58. Therefore, when the circuit board 51 is connected to the hermetic pins 53 by the connection terminals 54, the spacing between each board connection pin 57 is greater than the spacing between the hermetic pins 53 (Figure 2). This ensures an insulating distance between each board connection pin 57 (the insulating distance between each connection terminal 54 on the circuit board 51 side).

[0047] As described above, in this invention, through holes 56 into which the connection terminals 57 and hermetic pins 53 enter are formed in the circuit board 51, thus avoiding interference between the circuit board 51 and the hermetic pins 53 and connection terminals 54 in the height direction (the height direction of the inverter housing 13). This makes it possible to lower the height of the circuit board 51 from the partition wall 7A, and by reducing the height dimension of the inverter housing 13, it becomes possible to reduce the dimensions and weight of the electric compressor 1.

[0048] Furthermore, it becomes possible to avoid cracking of the hermetic plate 52 due to variations during assembly, and to standardize the hermetic plate 52 across different models, thereby reducing costs and development time.

[0049] Furthermore, in this embodiment, the connection terminal 54 is held in the circuit board 51 while inserted into the through hole 56, making it possible to omit any special parts for holding the connection terminal 54, thereby reducing the number of parts. Moreover, since the connection terminal 54 is movable in the planar direction of the circuit board 51 while held in place, it is possible to absorb variations in the position of the connection terminal 54 relative to the hermetic pin 53 during assembly, enabling smooth assembly by an automated machine.

[0050] Furthermore, in this embodiment, the connection terminal 54 is provided with a board connection pin 57 for connecting to the circuit board 51 and a mating portion 67 for connecting to the hermetic pin 53. The mating portion 67 is shaped to allow changes in the position of the connection terminal 54 relative to the hermetic pin 53, and the circuit board 51 This design includes an insertion hole 58 through which the board connection pins 57 are inserted, and a power basket 59 to which the board connection pins 57 are connected is provided in this insertion hole 58. This effectively absorbs variations in the position of the connection terminals 54 relative to the hermetic pins 53 during assembly, enabling stable electrical connection between the hermetic pins 53 and the circuit board 51 via the connection terminals 54, even when assembled by an automated machine.

[0051] Furthermore, in this embodiment, the connection terminal 54 is movable in the planar direction of the circuit board 51. For example, even if the position of the power basket 59 on the circuit board 51 differs depending on the model, the difference in position can be absorbed by moving the connection terminal 54, making it possible to standardize the hermetic plate 52 across different models.

[0052] In this case, three hermetic pins 53 and three power baskets 59 are provided in each embodiment, corresponding to each phase of the electric motor 2, and the connection terminals 54 are also connected to each hermetic pin 53. In this embodiment, the board connection pins 57 of each connection terminal 54 are connected to each power basket 59, and the spacing between each board connection pin 57 is set to be greater than the spacing between each hermetic pin 53. This ensures sufficient insulation distance between the connection terminals 54 on the circuit board 51 side, making it possible to handle ultra-high voltages.

[0053] Furthermore, in this embodiment, the connection terminal 54 is held in the through hole 56 of the circuit board 51, and the board connection pin 57 is connected to the power basket 59. With the mating portion 67 of the connection terminal 54 being able to be fitted onto the hermetic pin 53, it becomes possible to reduce the number of personnel required for assembly by an automated machine.

[0054] It goes without saying that the specific shapes of the connection terminals, etc., shown in the examples are not limited to those shown and can be modified without departing from the spirit of the present invention. [Explanation of Symbols]

[0055] 1. Inverter-integrated electric compressor 2. Electric motor (motor) 3 Inverter 4. Scroll compression mechanism (compression mechanism) 7 Stator Housing 7A Bulkhead 8 Covers 11 Housing 12 Motor Room 13 Inverter housing 51 Circuit board 52 Hermetic Plates 53 Hermetic Pins 54 Connection terminals 56 Through hole 57 PCB connection pins 58 Through hole 59 Power Basket 67 Fitting part 68, 69 Engaging claws

Claims

1. An inverter-integrated electric compressor comprises a motor chamber containing a motor, an inverter housing where an inverter that supplies power to the motor is mounted, and a hermetic plate provided in the partition wall between the motor chamber and the inverter housing, wherein the hermetic pins of the hermetic plate and the circuit board of the inverter are connected via connection terminals. The circuit board is formed and has through holes into which the connection terminal and the hermetic pin enter, The aforementioned connection terminal has a board connection pin for connecting to the circuit board and a mating portion for connecting to the hermetic pin, the mating portion is shaped to allow changes in the position of the connection terminal relative to the hermetic pin, and is held by the circuit board when it enters the through hole, and in that state the connection terminal is movable in the planar direction of the circuit board, The inverter-integrated electric compressor is characterized in that the circuit board has through holes through which the board connection pins are inserted, and a power basket is provided in the through holes to which the board connection pins are connected.

2. The hermetic pins and the power basket are provided in a plurality corresponding to each phase of the motor, and the connection terminals are connected to each of the hermetic pins, The inverter-integrated electric compressor according to claim 1, characterized in that, with the board connection pins of each connection terminal connected to each power basket, the spacing between each board connection pin is greater than the spacing between each hermetic pin.

3. The inverter-integrated electric compressor according to claim 1 or 2, characterized in that the connection terminal is held in a through hole of the circuit board, the board connection pin is connected to the power basket, and the mating portion of the connection terminal can be fitted onto the hermetic pin.

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