JP4983714B2 - Electric compressor - Google Patents

Description

  The present invention relates to an electric compressor in which a compression unit, an electric motor, and a motor drive circuit are sequentially arranged along the axial direction of a rotating shaft.

  In such an electric compressor, the inverter of the motor drive circuit includes a switching element, and generates a large amount of heat due to power loss of the switching element. For this reason, in the electric compressor, it is desired to improve the cooling performance of the motor drive circuit. As an electric compressor which improved the cooling property of the motor drive circuit, the electric compressor of patent document 1 is mentioned, for example. The housing of the electric compressor is formed by joining a discharge housing made of a metal material containing aluminum, an intermediate housing, a suction housing, and a lid member. A scroll-type compression unit is provided inside the housing of the electric compressor, and an electric motor that drives the compression unit by the rotation of the rotating shaft and a motor drive circuit that drives the electric motor are provided.

  In addition, the suction housing of the electric compressor is formed with a partition wall that divides the inside of the electric compressor into the compression portion and the electric motor side and the motor drive circuit side, and the opening of the suction housing is closed by a lid member. . A motor drive circuit including an inverter is accommodated in a space defined by the partition wall and the lid member in the electric compressor, and the motor drive circuit is attached to the suction housing in close contact with the partition wall. And in the electric compressor of patent document 1, when a partition wall is cooled by the refrigerant gas suck | inhaled in an electric compressor, the motor drive circuit closely_contact | adhered to the partition wall will be cooled.

In recent years, there is an electric compressor in which a motor drive circuit is pre-assembled on a lid member in order to improve the assembling property of the motor drive circuit to the electric compressor. In this electric compressor, a sealing member is interposed between the lid member and the opening end of the housing main body to which the lid member is fixed in order to prevent foreign matter and the like from entering the space that houses the motor drive circuit. Be dressed. Even in the electric compressor in which the motor drive circuit is assembled to the lid member, in order to improve the cooling performance of the motor drive circuit, the motor drive circuit is partitioned in the housing body with the lid member fixed to the housing body. It is in close contact with the partition wall.
JP 2000-291557 A

  By the way, in the electric compressor in which the motor drive circuit is assembled to the lid member, the motor drive circuit is brought into close contact with the partition wall in order to improve the cooling performance of the motor drive circuit, and further, foreign matter and the like are prevented from being mixed into the housing. Therefore, the gap between the lid member and the open end of the housing body must be sealed. However, in an electric compressor, there are assembly tolerances and manufacturing tolerances of parts. For this reason, in the electric compressor, in order to achieve both the adhesion between the motor drive circuit and the partition wall and the sealing performance between the housing body and the lid member, it is necessary to absorb the tolerance by deformation of the sealing member. It was. Therefore, the sealing member must be made of a material that establishes a sealing property between the lid member and the open end while being deformed as the lid member is fixed to absorb tolerances, such as a gasket or an O-ring. As compared with the case of using, it has become expensive. Further, since the sealing member is made of a material capable of absorbing tolerance, there is a problem that the fixing rigidity between the lid member and the opening end of the housing is low, and the fixing state of the lid member becomes unstable.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose of the sealing member is to achieve both the sealing performance between the opening end of the housing body and the lid member and the adhesion of the motor drive circuit to the partition wall without using the sealing member for tolerance absorption. Another object of the present invention is to provide an electric compressor capable of reducing the cost and further stabilizing the lid member in a fixed state.

  In order to solve the above problems, the invention according to claim 1 is a housing in which a lid member capable of opening and closing the opening is fixed to an opening end of a housing body having an opening via a sealing member. A compression unit that is supported by the rotation of the rotation shaft, an electric motor that rotates the rotation shaft, and a motor drive circuit that drives the electric motor. An electric compressor which is disposed in order along the axial direction of the rotary shaft, and in which the motor drive circuit is assembled to the lid member. The housing includes the compressor and the electric motor. A partition wall that partitions the first space that houses the motor and the second space that houses the motor drive circuit is disposed, and electrical components of the motor drive circuit are placed on the partition wall via a heat conducting member. The partition wall is fitted in the housing body, and the partition wall is rotated between the peripheral edge of the partition wall and the inner peripheral surface of the housing body. A seal member that seals between the first space and the second space while being slidable in the axial direction of the shaft is provided.

  According to this, when the partition wall is fitted inside the housing body, the lid member is fixed to the opening end of the housing body, and when the partition wall is pressed by the heat conducting member, the peripheral portion of the partition wall and the housing The seal member disposed between the inner peripheral surface of the main body and the inner peripheral surface of the housing main body is slidably contacted with each other, whereby the partition wall can be slid in the axial direction of the rotation shaft. As a result, the assembly tolerance of the electric compressor and the manufacturing tolerance of parts can be absorbed by the sliding of the partition wall. Therefore, in a state where the lid member is fixed to the opening end of the housing body, the heat conducting member can be brought into close contact with the partition wall, and the opening end of the housing body and the lid member can be brought into close contact with the sealing member. Since the sealing member does not need to be deformed to absorb tolerances, the cost required for the sealing member can be suppressed, and the fixing rigidity between the opening end of the housing body and the lid member can be increased.

  The partition wall may be provided with a bearing that rotatably supports one end side of the rotating shaft, and the other end side of the rotating shaft may be rotatably supported by a bearing provided in the compression portion. Good. According to this, it is possible to arrange the bearings so that both bearings are located on the same axis line (with the same degree of coaxiality) by accurately manufacturing the partition wall fitted inside the housing body.

  The seal member may be mounted in a mounting groove that is recessed in the peripheral end surface of the partition wall. According to this, the seal member is held in the mounting groove, and even if the partition wall is slid, the seal member can be prevented from being detached from the partition wall or twisted.

  A partition member for partitioning the suction gas atmosphere chamber in the first space together with the partition wall is fitted in the housing, and a refrigerant gas is provided at a position communicating with the suction gas atmosphere chamber in the housing. An inlet may be formed. According to this, the refrigerant gas can be retained in the vicinity of the partition wall by introducing the refrigerant gas introduced into the housing through the intake port into the intake gas atmosphere chamber. Therefore, the partition wall can be sufficiently cooled by the refrigerant gas, and the electrical component can be efficiently cooled via the partition wall and the heat conducting member.

  According to the present invention, it is possible to achieve both the sealing performance between the opening end of the housing body and the lid member and the adhesion of the motor drive circuit to the partition wall without using the sealing member for tolerance absorption, It is possible to reduce the cost of the sealing member and to stabilize the fixing state of the lid member.

(First embodiment)
Hereinafter, a first embodiment in which the present invention is embodied in an electric compressor mounted on a hybrid vehicle and used in a vehicle air conditioner will be described with reference to FIGS. 1 and 2. In the following description, for the “front” and “rear” of the electric compressor, the direction of the arrow Y shown in FIG.

  As shown in FIG. 1, the housing 10 of the electric compressor C includes a cylindrical housing body 11 having a first opening K1 at the rear end (one end) and a second opening K2 at the front end (the other end). And a first lid member 12 that can open and close the first opening K1 of the housing body 11, and a second lid member 13 that can open and close the second opening K2. The housing body 11, the first lid member 12, and the second lid member 13 are each made of an aluminum alloy die casting.

  A plurality of first bolt holes 11 c are formed at the rear end portion of the housing body 11, and a plurality of second bolt holes 11 d are formed at the front end portion of the housing body 11. On the other hand, a plurality of bolt insertion holes 12 a and 13 a are formed at positions near the periphery of the first lid member 12 and the second lid member 13. Then, the bolt B1 inserted through the bolt insertion hole 12a of the first lid member 12 is screwed into the first bolt hole 11c of the housing main body 11, whereby the first opening end 11a of the housing main body 11 is first connected. The lid member 12 is fixed.

  In addition, the bolt B1 inserted into the bolt insertion hole 13a of the second lid member 13 is screwed into the second bolt hole 11d of the housing body 11, whereby the second opening end 11e of the housing body 11 is secondly connected. The lid member 13 is fixed. Between the first and second open ends 11a and 11e of the housing body 11 and the first and second lid members 12 and 13, a gasket G in which a rubber plate is applied to a metal plate as a sealing member is interposed. It is disguised. The gasket G seals between the first opening end 11 a of the housing body 11 and the first lid member 12 and between the second opening end 11 e and the second lid member 13.

  In addition, a partition wall 30 described later is disposed in the housing main body 11, and the interior of the housing 10 is partitioned into a first space S and a second space T by the partition wall 30. The first space S is formed by the front side of the housing body 11, the partition wall 30, and the second lid member 13. The second space T is formed by the rear side of the housing body 11, the partition wall 30, and the first lid member 12. In the housing 10, the electric motor 18 and the compression unit 23 are accommodated in the first space S, and the motor drive circuit 41 is accommodated in the second space T. Further, two mounting legs 15 are formed on the outer surface of the housing main body 11, and one mounting leg 15 is formed at the center of the outer surface of the first lid member 12. The electric compressor C is mounted on the hybrid vehicle by screwing bolts (not shown) inserted through the mounting legs 15 into an engine (not shown) of the hybrid vehicle.

  A rotary shaft 17 is disposed in the housing main body 11, and the rotary shaft 17 is rotatably supported by a first bearing 16 a having a rear end portion 17 a (one end portion) provided on the partition wall 30. The front end portion 17b (the other end portion) is rotatably supported by a second bearing 16b provided in the compression portion 23. The direction along the central axis L of the rotating shaft 17 is the axial direction of the electric compressor C. In the housing body 11, a compression portion 23 is disposed on the front end side (the other end side), and an electric motor 18 is disposed on the rear end side (one end side).

  The electric motor 18 includes a stator 19 fixed to the inner surface of the housing body 11 and a rotor 22 fixed to the rotary shaft 17 inside the stator 19. The electric motor 18 rotates the rotating shaft 17 via the rotor 22 by receiving power supplied to the stator 19. A motor lead wire 20 is electrically connected to the stator 19, and the motor lead wire 20 is connected to a connector clip 21 b stored in the cluster block 21. The cluster block 21 is positioned and fixed to the inner peripheral surface 11b of the housing body 11 by pins (not shown).

  The compression unit 23 is a scroll type including a fixed scroll 23a and a movable scroll 23b. A refrigerant gas inlet 24 is formed on the rear end side of the housing body 11. The compression unit 23 compresses the refrigerant gas by turning the movable scroll 23b with respect to the fixed scroll 23a according to the rotation of the rotary shaft 17. Accordingly, when the compression unit 23 is driven by the rotation of the rotating shaft 17 by the drive of the electric motor 18, the low-temperature and low-pressure refrigerant gas from the external refrigerant circuit (not shown) is supplied from the suction port 24 to the electric motor in the housing body 11. The air is sucked into the compression unit 23 via 18 vicinity. The refrigerant gas sucked into the compression unit 23 becomes a high-temperature and high-pressure refrigerant gas by the compression action of the compression unit 23 and is discharged from the discharge port 25 formed in the second lid member 13 to the external refrigerant circuit.

  The partition wall 30 described above is formed in a disk shape from a metal material having high thermal conductivity (aluminum in the embodiment). The partition wall 30 includes a plate main body 31 having a disk shape, and includes a bulging portion 32 that bulges in a cylindrical shape from the center of the surface of the plate main body 31 on the first space S side. The maximum diameter of the partition wall 30 (the diameter of the plate main body 31) is slightly smaller than the inner diameter of the housing main body 11. In addition, a mounting groove 31a is formed in the circumferential end surface of the plate body 31 so as to be recessed over the entire periphery of the plate body 31, and an O-ring 33 as a seal member is mounted in the mounting groove 31a. The partition wall 30 is disposed in the housing main body 11 by fitting the plate main body 31 in the housing main body 11, and the O-ring 33 is attached to the inner peripheral surface 11 b as the inner peripheral portion of the housing main body 11. The space between the first space S and the second space T is sealed in close contact with the peripheral end surface of the plate body 31 that forms the groove 31a.

  A shaft insertion hole 32a is recessed in the center of the bulging portion 32, and a first bearing 16a that supports the rear end portion 17a of the rotary shaft 17 is accommodated in the shaft insertion hole 32a. 17 is supported by the partition wall 30 on the rear end 17a side. In addition, airtight terminals 48 of a plurality of lead wires 47 electrically connected to the motor drive circuit 41 are airtightly fixed to the plate body 31 (see FIG. 2). Each airtight terminal 48 is electrically connected to the connector clip 21b of the cluster block 21.

  A motor drive circuit 41 is integrally assembled with the lid member 12. The motor drive circuit 41 includes an inverter and supplies power to the stator 19 of the electric motor 18 based on a command from an air conditioner ECU (not shown). The motor drive circuit 41 includes a flat substrate 43, a switching element 44a as an electric component mounted on the substrate 43, an electrolytic capacitor 44b, a coil 44c, a driver 44d, and the like. The driver 44d is an IC chip that intermittently controls the switching element 44a based on a command from the air conditioner ECU. The switching element 44a is in close contact with a heat conducting member 50 formed in a disk shape from a metal material having high thermal conductivity (aluminum in the embodiment).

  Each of the substrate 43 and the heat conducting member 50 is assembled to the first lid member 12 so as to be parallel to the first lid member 12. A cylindrical first interposing member 51 is interposed between a surface facing the second space T in the first lid member 12 and the substrate 43 facing the surface, and a partition wall in the substrate 43 A cylindrical second interposed member 52 is interposed between the surface on the 30 side and the heat conducting member 50 facing this surface. Then, the first lid member 12 is formed by screwing the bolt B2 penetrating the first lid member 12, the first interposed member 51, the substrate 43, and the second interposed member 52 into the heat conducting member 50. The first interposing member 51, the substrate 43, the second interposing member 52, and the heat conducting member 50 are integrated, and the motor driving circuit 41 is assembled to the first lid member 12.

  In a state where the first lid member 12 having the above configuration is fixed to the first opening end 11a of the housing body 11, the heat conducting member 50 is in close contact with the surface of the partition wall 30 on the second space T side, and the heat conducting member. The switching element 44 a and the partition wall 30 can conduct heat through 50. In the housing 10, the compression unit 23, the electric motor 18, and the motor drive circuit 41 are sequentially arranged along the axial direction of the rotating shaft 17.

  Next, the fixing of the first lid member 12 to the first opening end 11a of the housing body 11 in the electric compressor C having the above configuration will be described. It is assumed that the second lid member 13 is already fixed to the second opening end 11 e of the housing body 11 and the motor drive circuit 41 is assembled to the first lid member 12.

  Now, in a state in which the compression portion 23, the electric motor 18, and the partition wall 30 are disposed in the housing body 11, first, the partition wall 30 is fitted into the housing body 11 as shown in FIG. The airtight terminal 48 of the motor drive circuit 41 is inserted and connected to the connector clip 21 b of the cluster block 21, and the rear end 17 a of the rotating shaft 17 is inserted into the first bearing 16 a of the partition wall 30. Then, as shown in FIG. 1, the electric motor 18 and the motor drive circuit 41 (substrate 43) are electrically connected via the motor lead wire 20 and the lead wire 47.

  Next, as shown in FIG. 2, a gasket G is interposed between the first opening end 11 a of the housing body 11 and the first lid member 12, and is further assembled to the first lid member 12. The motor drive circuit 41 is accommodated in the housing body 11 from the first opening K1 of the housing body 11.

  Next, the plurality of bolts B <b> 1 are screwed into the first bolt holes 11 c of the housing body 11 from the bolt insertion holes 12 a of the first lid member 12, and the first lid is fitted to the first opening end 11 a of the housing body 11. The member 12 is fixed. The first opening end 11a and the first lid member 12 are in close contact with the gasket G, and at the same time, the bolt B1 is attached so that the surface on the partition wall 30 side of the heat conductive member 50 is in close contact with the heat conductive member 50. 1 to the bolt hole 11c. When the heat conducting member 50 integrated with the first lid member 12 comes into contact with the partition wall 30 by the tightening axial force of the bolt B1, the heat conducting member 50 causes the partition wall 30 to move in the axial direction of the rotary shaft 17. It is pressed from the rear side to the front side (electric motor 18 side).

  At this time, the O-ring 33 comes into sliding contact with the inner peripheral surface 11 b of the housing body 11, and the partition wall 30 slides in the axial direction of the rotary shaft 17. For this reason, the position of the partition wall 30 in the housing body 11 is finely adjusted, the first opening end 11a of the housing body 11 and the first lid member 12 are in close contact with the gasket G, and the heat conducting member 50 The partition wall 30 is in close contact. And when the 1st cover member 12 is fixed to the 1st opening end 11a of the housing main body 11, and the housing 10 is formed, manufacture of the electric compressor C will be completed. In a state where the production of the electric compressor C is completed, the partition wall 30 moves from the front side to the rear side (motor drive circuit 41 side) in the axial direction of the rotary shaft 17 due to the pressure difference between the first space S and the second space T. By being pressed, the partition wall 30 and the heat conducting member 50 are brought into close contact with each other.

  In the electric compressor C, when the compression unit 23 is driven by driving the electric motor 18, the low-temperature and low-pressure refrigerant gas from the external refrigerant circuit (not shown) is relatively low temperature from the suction port 24 into the first space S. Refrigerant gas is introduced. Then, the partition wall 30 is cooled by the refrigerant gas, and the switching element 44a in close contact with the heat conducting member 50 is cooled through the heat conducting member 50 in close contact with the partition wall 30.

According to the above embodiment, the following effects can be obtained.
(1) The partition wall 30 was fitted into the housing body 11, and the O-ring 33 was interposed between the peripheral edge of the partition wall 30 and the inner peripheral surface 11 b of the housing body 11. When the first lid member 12 is fixed to the first open end 11 a of the housing body 11, when the partition wall 30 is pressed by the heat conducting member 50, the partition wall 30 is moved along the axial direction of the rotary shaft 17. It can be made to slide, and the position of the partition wall 30 can be finely adjusted. As a result, the assembly tolerance of the electric compressor C and the manufacturing tolerance of parts can be absorbed by the sliding of the partition wall 30, and the first opening end 11 a of the housing body 11 and the first lid member 12 are gasketed. At the same time that the heat conducting member 50 can be brought into close contact with the partition wall 30. Therefore, in the state where the first lid member 12 is fixed to the housing main body 11, the cooling performance of the motor drive circuit 41 is improved by establishing the adhesion to the partition wall 30 of the motor drive circuit 41. Due to the establishment of a sealing property between the lid member 12 and the first opening end 11a of the housing main body 11, mixing of foreign matter or the like into the housing 10 can be prevented.

  (2) The partition wall 30 is fitted inside the housing body 11 so that it can slide in the axial direction of the rotary shaft 17. For this reason, the sealing member interposed between the first open end 11a of the housing body 11 and the first lid member 12 does not need to be deformed to absorb the tolerance, and the rubber plate is applied to the metal plate as the sealing member. The gasket G which gave can be used. As a result, the cost required for the sealing member can be suppressed, and the fixing rigidity between the first opening end 11a of the housing body 11 and the first lid member 12 can be increased, and the first lid member 12 can be increased. Can be fixed to the housing body 11 in a stable state. Therefore, the mounting leg 15 is formed on the first lid member 12, and even if the vibration of the engine is transmitted to the first lid member 12 via the mounting leg 15, the first lid member 12 does not vibrate. Generation of noise due to vibration can be prevented.

  (3) Since the motor drive circuit 41 is assembled to the first lid member 12, the first lid member 12 is fixed to the first open end 11a of the housing body 11, and at the same time, the motor drive circuit 41 is It can be accommodated in the two spaces T, and the heat conducting member 50 can be brought into close contact with the partition wall 30. Therefore, the operation of housing and arranging the motor drive circuit 41 in the second space T and the operation of bringing the heat conducting member 50 into close contact with the partition wall 30 in order to improve the cooling performance of the switching element 44a can be performed simultaneously. The manufacturing time of the compressor C can be shortened.

  (4) The O-ring 33 is mounted in a mounting groove 31 a formed on the peripheral end surface of the plate body 31 in the partition wall 30. For this reason, the O-ring 33 is held in the mounting groove 31a, and even when the partition wall 30 is slid, the O-ring 33 can be prevented from being detached from the partition wall 30 or twisted.

  (5) The partition wall 30 is provided with a first bearing 16 a that supports the rear end portion 17 a of the rotary shaft 17. Further, the partition wall 30 faces the first space S, and the heat conduction member 50 having the switching element 44a in close contact with the partition wall 30 is in close contact therewith. For this reason, the partition wall 30 has the function to support the rotating shaft 17 rotatably, and the function as a cooling plate of the switching element 44a. The partition wall 30 also has a function of absorbing assembly tolerances and component manufacturing tolerances by sliding when the electric compressor C is manufactured. Therefore, three functions can be exhibited by one partition wall 30 by fitting the partition wall 30 in the housing main body 11 and making it slidable.

  (6) The rotary shaft 17 is rotatably supported by the second bearing 16b provided at the front end portion 17b in the compression portion 23, and rotated by the first bearing 16a provided at the partition wall 30 in the rear end portion 17a. It is supported by. Then, by manufacturing the partition wall 30 with high accuracy, the first bearing 16a and the second bearing 16b are positioned on the same axis line only by fitting the partition wall 30 into the housing body 11 (coaxiality). Can be arranged). For example, when the partition wall 30 is positioned on the housing main body 11 with bolts, the coaxiality is hardly generated due to the positional accuracy of the bolt holes and the clearance between the bolt holes and the bolts. In this case, it is necessary to position the first bearing 16a with a jig in order to obtain coaxiality. However, by providing the first bearing 16 a on the partition wall 30 and fitting the partition wall 30 into the housing body 11, there is no clearance between the bolt hole and the bolt, and the coaxiality is easily obtained. As a result, it is not necessary to position the first bearing 16a with a jig in order to obtain the coaxiality. Therefore, by providing the first bearing 16a on the partition wall 30, the coaxiality between the first bearing 16a and the second bearing 16b can be easily obtained, and further, the electric compressor C can be manufactured without using a jig. Can be easily performed.

  (7) A plurality of motor lead wires 20 connected to the electric motor 18 were connected to the cluster block 21, and the cluster block 21 was positioned in the housing body 11. The plurality of airtight terminals 48 connected to the motor drive circuit 41 can be connected to the connector clip 21b of the cluster block 21. For this reason, when the lid member 12 to which the motor drive circuit 41 is assembled is fixed to the housing body 11, the connection work is performed simply by inserting the plurality of airtight terminals 48 toward the connector clip 21 b of the cluster block 21. Therefore, the connection work between the electric motor 18 and the motor drive circuit 41 can be easily performed.

  (8) The motor lead wire 20 connected to the electric motor 18 was connected to the cluster block 21 and the cluster block 21 was positioned in the housing body 11. For this reason, the motor lead wire 20 is arranged behind the housing body 11 from the cluster block 21. Therefore, when the airtight terminal 48 of the motor drive circuit 41 and the motor lead wire 20 are connected, the motor lead wire 20 is not pulled out to the outside of the housing main body 11, and the motor lead wire 20 is the first of the housing main body 11. It is possible to prevent biting between the opening end 11a of the first lid member 12 and the first lid member 12.

(Second Embodiment)
Hereinafter, a second embodiment in which the present invention is embodied in an electric compressor mounted on a hybrid vehicle and used in a vehicle air conditioner will be described with reference to FIG. In the second embodiment described below, the overlapping description of the same configuration as that of the first embodiment already described is omitted or simplified.

  As shown in FIG. 3, the partition wall 60 is formed in a disk shape, and a mounting groove 60a is formed on the peripheral end surface of the partition wall 60, and an O-ring 61 as a seal member is mounted in the mounting groove 60a. Yes. The O-ring 61 is interposed between the peripheral edge of the partition wall 60 and the inner peripheral surface 11 b of the housing body 11, and the partition wall 60 slides in the axial direction of the rotary shaft 17 by the sliding contact of the O-ring 61. It is possible.

  In the housing main body 11, a partition member 62 formed in a disk shape from a synthetic resin material (for example, fiber reinforced plastic) having a heat insulating property is disposed closer to the electric motor 18 side than the partition wall 60. The maximum diameter of the partition member 62 is slightly smaller than the inner diameter of the housing body 11 so that the partition member 62 can be fitted inside the housing body 11. A bearing housing portion 62a that bulges toward the first space S side is formed at the center portion of the surface of the partition member 62 on the first space S side, and the center portion of the bearing housing portion 62a is rotated. The 1st bearing 16a which supports the rear-end part 17a of the axis | shaft 17 is accommodated. The cluster block 63 is fixed to the surface of the partition member 62 on the motor drive circuit 41 side, and the other end of the motor lead wire 20 is connected to the connector lip 63b of the cluster block 63. Furthermore, a communication hole 65 is formed in the partition member 62 so as to penetrate the partition member 62 in the thickness direction.

  The partition member 62 is fitted in the housing body 11, whereby the intake gas atmosphere chamber 64 is partitioned in the first space S by the partition wall 60 and the partition member 62. The suction gas atmosphere chamber 64 and the first space S communicate with each other through a communication hole 65. In the housing body 11, a suction port 24 is formed at a position corresponding to the suction gas atmosphere chamber 64. In addition, the partition member 62 is fitted in the housing main body 11, and the movement in the housing main body 11 is restricted, whereby the cluster block 63 fixed to the partition member 62 is positioned in the housing main body 11.

Therefore, according to 2nd Embodiment, in addition to the effect similar to the effect as described in (1)-(4), (8) of 1st Embodiment, the following effects can be acquired.
(9) The rotary shaft 17 is rotatably supported by the second bearing 16 b provided at the front end portion 17 b in the compression portion 23, and can be rotated by the first bearing 16 a provided in the partition member 62 in the rear end portion 17 a. It is supported by. Then, by manufacturing the partition member 62 with high accuracy, the first bearing 16a and the second bearing 16b are positioned on the same axis line only by fitting the partition member 62 into the housing body 11 (coaxiality). Can be arranged).

  (10) The plurality of motor lead wires 20 connected to the electric motor 18 are connected to the cluster block 63 and the cluster block 63 is fixed to the partition member 62. For this reason, the cluster block 63 can be positioned by fitting the partition member 62 into the housing main body 11. Therefore, when the first lid member 12 and the housing body 11 are fixed, the cluster block 63 to be connected to the airtight terminal 48 is prevented from moving, and the connection work can be easily performed.

  (11) The suction gas atmosphere chamber 64 can be partitioned from the partition wall 60 by the partition member 62. For this reason, by introducing the refrigerant gas introduced into the housing 10 through the suction port 24 into the intake gas atmosphere chamber 64, the refrigerant gas can be retained in the vicinity of the partition wall 60. Therefore, the partition wall 60 can be sufficiently cooled by the refrigerant gas, and the switching element 44a can be efficiently cooled via the partition wall 60 and the heat conducting member 50.

  (12) The partition member 62 is made of a synthetic resin material having heat insulation properties. Therefore, the heat generated from the electric motor 18 and the compression unit 23 by the partition member 62 is suppressed from being transmitted to the intake gas atmosphere chamber 64, and the refrigerant gas introduced into the intake gas atmosphere chamber 64 is suppressed from being heated. be able to.

  (13) The cluster block 63 can be positioned via the partition member 62 by fixing the cluster block 63 to the partition member 62 and fitting the partition member 62 into the housing main body 11. Therefore, if the cluster block 63 is the partition member 62, a fixed position can be arbitrarily selected, and the degree of freedom of arrangement of the cluster block 63 in the housing 10 can be increased.

In addition, you may change this embodiment as follows.
In the first embodiment, using the pressure difference between the first space S and the second space T, the partition wall 30 is pressed from the front side to the rear side (motor drive circuit 41 side) in the axial direction of the rotary shaft 17. It had been. In contrast, the first lid member 12 and the partition wall 30 are connected by a spring (not shown), and the partition wall 30 is axially moved from the front side to the rear side (motor drive circuit 41 side) by using the elastic force of the spring. The partition wall 30 and the heat conducting member 50 may be brought into close contact with each other by being pulled by. Further, the surface of the partition wall 30 on the side of the electric motor 18 and a member arranged in the first space S are connected by a spring (not shown), and the partition wall 30 is pivoted by using the elastic force of the spring. The direction may be pressed from the front side to the rear side (motor drive circuit 41 side).

(Circle) in 2nd Embodiment, you may form the division member 62 with the ceramic as a heat insulating material.
(Circle) in 2nd Embodiment, the division member 62 may be formed with the metal material instead of a heat insulating material.

  As shown in FIG. 4, in the second embodiment, an annular groove 60 c is recessed in the end surface of the partition wall 60 on the partition member 62 side. Then, an O-ring 61 as a sealing member may be mounted in the annular groove 60 c and the space between the partition wall 60 and the inner peripheral surface 11 b of the housing body 11 may be sealed by the O-ring 61. Even if comprised in this way, when the 1st cover member 12 is fixed to the 1st opening end 11a of the housing main body 11 with the volt | bolt B1, the partition wall 60 can be slid in the axial direction of the rotating shaft 17. The position of the partition wall 60 can be finely adjusted.

  In the first and second embodiments, the first lid member 12 and the motor drive circuit 41 are integrated by the bolt B2, and the first lid member 12 and the motor drive circuit 41 are separated from the partition walls 30 and 60. However, the first lid member 12, the motor drive circuit 41, and the partition walls 30 and 60 may be integrated by a bolt B2.

  In each embodiment, the sealing member that seals between the first lid member 12 and the first opening end 11a of the housing body 11 is fixed rigidity between the first lid member 12 and the first opening end 11a. Other than the gasket G, it may be used as long as it increases.

  In each embodiment, the housing 10 is formed by joining a housing main body whose bottom is integrally formed on the front end side and a lid member that can open and close the opening formed on the rear end side of the housing main body. May be.

(Circle) the compression part 23 is not restricted to a scroll type, For example, a piston type and a vane type may be sufficient.
The electric compressor C may be mounted not on a hybrid vehicle but on a vehicle driven by an engine or an electric vehicle.

The electric compressor C is not used for a vehicle air conditioner but may be used for other air conditioners.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.

  (1) The electric compressor according to claim 4, wherein the partition member is formed of a heat insulating material.

The longitudinal cross-sectional view which shows the electric compressor of 1st Embodiment. The figure which shows the state before attaching a partition wall and a 1st cover member to a housing main body. The figure which shows the partition wall vicinity of 2nd Embodiment. The figure which shows another example of 2nd Embodiment.

Explanation of symbols

  C: Electric compressor, G: Gasket as a sealing member, K ... Opening, S ... First space, T ... Second space, 10 ... Housing, 11 ... Housing body, 11a ... First opening as opening end End, 11b ... Inner peripheral surface, 12 ... Lid member, 16a, 16b ... First and second bearings as bearings, 17 ... Rotating shaft, 18 ... Electric motor, 23 ... Compression section, 24 ... Suction port, 30, 60 ... partition wall, 31a ... mounting groove, 33, 61 ... O-ring as seal member, 41 ... motor drive circuit, 44a ... switching element as electrical component, 50 ... heat conducting member, 62 ... partition member, 64 ... suction gas Atmosphere room.

Claims (4)

A rotating shaft is rotatably supported in a housing in which a lid member that can open and close the opening is fixed to an opening end of a housing body having an opening via a sealing member. A compression unit that is driven by rotation, an electric motor that rotates the rotating shaft, and a motor drive circuit that drives the electric motor are sequentially disposed along the axial direction of the rotating shaft, and further, the motor driving An electric compressor in which a circuit is assembled to the lid member,
A partition wall that divides the housing into a first space that accommodates the compression portion and the electric motor and a second space that accommodates the motor drive circuit is disposed in the housing, and the motor drive circuit An electrical component is disposed on the partition wall through a heat conducting member so as to be capable of conducting heat,
The partition wall is fitted in the housing body, and the partition wall is slidable in the axial direction of the rotating shaft between the peripheral edge of the partition wall and the inner peripheral surface of the housing body. An electric compressor provided with a seal member that seals between the first space and the second space.   2. The partition wall is provided with a bearing that rotatably supports one end side of the rotating shaft, and the other end side of the rotating shaft is rotatably supported by a bearing provided in the compression portion. The electric compressor described in 1.   The electric compressor according to claim 1, wherein the seal member is mounted in a mounting groove that is recessed in a peripheral end surface of the partition wall.   A partition member that partitions the suction gas atmosphere chamber in the first space together with the partition wall is fitted in the housing, and refrigerant gas is sucked at a position in the housing that communicates with the suction gas atmosphere chamber. The electric compressor according to any one of claims 1 to 3, wherein a mouth is formed.

Images