Electric compressor

Abstract

To prevent damage to a resin coating part of a conducting wire connected to a coil part and to appropriately secure an insulation distance between the conducting wire and other members.SOLUTION: An electric compressor 100 has a housing 10, a compressor compressing coolant including lubricating oil, and a motor rotating the compressor, in which the motor has a stator, a rotor, a plurality of lead wires 47 connected to a plurality of coil parts 46, and a protection tube 48 arranged so as to surround a whole circumference of the lead wires 47 and protecting the lead wires 47 from moisture included in the lubricating oil. The lead wires 47 are coated by a resin coating part and arranged along a circumferential direction CD around an axis line X, and the protection tube 48 is arranged on only a part of a protection area PA of the circumferential direction CD including a region in which the lead wires 47 are dipped into the lubricating oil stored in an internal space IS of the housing 10.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to an electric compressor. [Background technology]

[0002] In conventional hermetic motors used in electric compressors, etc., power is supplied from an external source to a coil portion, which is formed by winding a coil around a stator. The external power is supplied to the coil portion by connecting a sealed terminal, which is installed through the motor housing case, to the coil portion with a lead wire.

[0003] Patent Document 1 points out the problem that a part of the lead wire becomes free between the end of the stator and the motor housing case, and this free part comes into contact with the rotor or the like, damaging the coating of the lead wire and causing a short circuit.In Patent Document 1, the bobbin around which the coil is wound is provided with a guide part that restricts the movement of the lead wire toward the rotor, thereby preventing the lead wire from coming into contact with the rotor or the like. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-146157 Summary of the Invention [Problem to be solved by the invention]

[0005] The refrigerant compressed by the compression mechanism built into the electric compressor contains lubricating oil used inside the electric compressor. If the lubricating oil stored in the motor housing contains water, the resin coating of the lead wire immersed in the lubricating oil may be damaged by hydrolysis, causing a short circuit.

[0006] The present disclosure has been made in consideration of the above circumstances, and aims to provide an electric compressor that can prevent damage to the resin coating of the conductor connected to the coil portion and can properly ensure the insulation distance between the conductor and other components. [Means for solving the problem]

[0007] an electric compressor according to one aspect of the present disclosure, the electric compressor comprising: a housing formed in a cylindrical shape extending along an axis; a compressor disposed inside the housing and rotating about the axis to compress a refrigerant containing lubricating oil; and a motor that drives the compressor to rotate about the axis, the motor comprising: a stator fixed inside the housing and having a plurality of teeth around which coils are wound; a rotor disposed on the inner periphery of the stator; a plurality of coil sections formed by winding the coils around the plurality of teeth; a plurality of conductors connected to one end sides of the plurality of coil sections in a direction along the axis; and a protective member disposed to surround the entire circumference of the conductors and protect the conductors from moisture contained in the lubricating oil, the conductors being covered with a resin covering and disposed circumferentially about the axis, the protective member being disposed only in a partial protective area in the circumferential direction that includes an area where the conductors are immersed in the lubricating oil stored in the internal space of the housing. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide an electric compressor that can prevent damage to the resin coating of the conductor connected to the coil portion and can properly ensure the insulation distance between the conductor and other components. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a partial vertical cross-sectional view showing an electric compressor according to an embodiment of the present disclosure. [Figure 2] 2 is a cross-sectional view of the electric compressor shown in FIG. 1 taken along the line AA. [Figure 3] 2 is a cross-sectional view of the electric compressor shown in FIG. 1 taken along the arrow BB. [Figure 4] FIG. [Figure 5] 4 is a cross-sectional view of the electric compressor shown in FIG. 3 taken along the arrow CC. [Figure 6] FIG. 4 is a cross-sectional view of the electric compressor shown in FIG. 3 taken along the arrow DD. DETAILED DESCRIPTION OF THE INVENTION

[0010] An electric compressor 100 according to an embodiment of the present disclosure will now be described with reference to the drawings. Fig. 1 is a partial vertical cross-sectional view showing the electric compressor according to this embodiment. Fig. 2 is a cross-sectional view of the electric compressor 100 shown in Fig. 1 taken along the line AA. Fig. 3 is a cross-sectional view of the electric compressor 100 shown in Fig. 1 taken along the line BB. Fig. 4 is a cross-sectional view of the electric compressor 100 shown in Fig. 3 taken along the line CC. Fig. 5 is a cross-sectional view of the electric compressor 100 shown in Fig. 3 taken along the line DD. The rotor 42 and drive shaft 43 shown in Fig. 2 are not shown in Fig. 3.

[0011] The electric compressor 100 of this embodiment is a device that compresses a refrigerant (fluid) drawn through a suction port P1 and discharges the compressed refrigerant from a discharge port P2 to the outside. As shown in Fig. 1, the electric compressor 100 of this embodiment includes a housing 10, an end housing (sealing member) 20, a compressor 30, a motor 40, a sealed terminal 50, a first bearing 60, a second bearing 70, and a retaining portion 80.

[0012] The housing 10 is a generally cylindrical member extending along the axis X, and accommodates the compressor 30 and the motor 40 therein. The housing 10 is made of a metal material such as an aluminum alloy. The housing 10 has an opening 11 sealed by the end housing 20 at its end on the end housing 20 side in the direction of the axis X. As shown in FIGS. 2 and 3 , the housing 10 is fixed to the enclosure 200 via legs 14 with the axis X oriented horizontally.

[0013] 1, a suction port P1 is provided on the outer peripheral surface of the housing 10 near the bottom 12, above the vertical direction (gravity direction) VD. Refrigerant supplied from the outside is introduced into the housing 10 through the suction port P1. The refrigerant introduced into the housing 10 flows along the axis X from the bottom 12 toward the opening 11.

[0014] The end housing 20 is a member that seals the opening 11 of the housing 10 when the compressor 30 and the motor 40 are inserted into the housing 10 through the opening 11. The end housing 20 is fixed to the housing 10 by fastening bolts 21 into fastening holes (not shown) formed in the opening 11 of the housing 10. The opening 11, which is located at the end of the housing 10 on the compressor 30 side along the axis X, is sealed by the end housing 20.

[0015] The compressor 30 is a device disposed inside the housing 10 and rotates about the axis X to compress the refrigerant. The compressor 30 includes, for example, a scroll compression mechanism that compresses the refrigerant by orbiting a rotating scroll (not shown) combined with a fixed scroll (not shown) fixed to the housing 10 about the axis X. The refrigerant compressed by the compressor 30 contains lubricating oil for lubricating the compressor 30.

[0016] The compressor 30 draws in and compresses the refrigerant introduced into the housing 10 through the suction port P1, and guides the compressed refrigerant to a discharge port P2 provided in the end housing 20. The refrigerant guided to the discharge port P2 is supplied to the outside via a pipe (not shown) connected to the discharge port P2.

[0017] The motor 40 is a device that drives the compressor 30 to rotate around the axis X. The motor 40 has a stator 41, a rotor 42, a drive shaft 43, a bobbin 44, a bobbin 45, a plurality of coil portions 46, a plurality of lead wires (conductors) 47, and a plurality of protective tubes 48.

[0018] The stator 41 is fixed inside the housing 10 and is formed by laminating a predetermined number of electromagnetic steel sheets that have been punched into an annular shape. As shown in Fig. 2, a plurality of teeth 41a are provided on the inner periphery of the stator 41. A coil (not shown) is wound around each of the plurality of teeth 41a of the stator 41.

[0019] The rotor 42 is disposed with a predetermined gap provided on the inner circumferential side of the stator 41. The rotor 42 is formed by laminating a predetermined number of electromagnetic steel sheets that are punched into an annular shape.

[0020] Drive shaft 43 is a member that is inserted into a through hole formed in the center of rotor 42, connected to rotor 42, and disposed on axis X. Drive shaft 43 rotates integrally with rotor 42 about axis X, and transmits a driving force that rotates about axis X to compressor 30. An end of drive shaft 43 on the opening 11 side is supported by a first bearing 60 so as to be rotatable about axis X. An end of drive shaft 43 on the bottom 12 side is supported by a second bearing 70 so as to be rotatable about axis X.

[0021] The bobbin 44 is a member that supports the coil wound around the teeth 41 a of the stator 41 on the bottom 12 side in the direction along the axis X. Similarly, the bobbin 45 is a member that supports the coil wound around the teeth 41 a of the stator 41 on the opening 11 side in the direction along the axis X. The bobbins 44 and 45 are formed from a resin material.

[0022] 3, bobbins 44 disposed on the bottom 12 side in the direction along the axis X have a plurality of support portions 44a for supporting the coils wound around the teeth 41a. The number of support portions 44a provided is the same as the number of teeth 41a (nine in FIG. 3). Each bobbin 44 also has fixing portions 44b for winding and fixing lead wires 47 connected to the coils wound around the bobbins 44.

[0023] The coil portion 46 is a portion formed by winding a coil around a plurality of teeth 41a of the stator 41. As shown in Fig. 3, an end of the coil portion 46 on the bottom portion 12 side in the direction along the axis X is supported by a bobbin 44.

[0024] The lead wires 47 are conductors connected to the ends of the multiple coil portions 46 on the bottom portion 12 side in the direction along the axis X. The lead wires 47 electrically connect the coil portions 46 to the sealed terminal 50. One end of the lead wires 47 is wound around each of the multiple fixing portions 44b, and the lead wires 47 are arranged to extend clockwise along the circumferential direction CD shown in FIG. 3. The multiple lead wires 47 are connected to the sealed terminal 50 with each wire covered by a cable cover CA1, CA2, CA3.

[0025] Fig. 4 is a cross-sectional view showing lead wire 47. As shown in Fig. 4, lead wire 47 has a core wire 47a and a covering portion 47b. Core wire 47a is made of copper and is covered with covering portion 47b made of resin (for example, polyesterimide, polyamideimide).

[0026] The protective tube 48 is a member disposed so as to surround the entire circumference of the lead wire 47 and protects the lead wire 47 from moisture contained in the lubricating oil. The protective tube 48 is a tubular member made of a resin material (for example, polyester). The protective tube 48 is thicker than the covering portion 47b of the lead wire 47.

[0027] Lubricating oil (not shown) contained in the refrigerant is stored below the vertical direction (gravity direction) VD of the internal space IS of the housing 10 shown in Figure 3. Because the refrigerant flows through the internal space IS, the lubricating oil does not have a liquid surface at a fixed height, but accumulates below the vertical direction (gravity direction) VD of the internal space IS. As shown in Figure 3, the lubricating oil is mainly stored in the region from the lowest end of the housing 10 in the vertical direction VD to a height H1. This region is where the lead wire 47 is immersed in the lubricating oil.

[0028] 3, protective tube 48 is disposed only in a partial protection area PA in the circumferential direction, which includes an area (area at or below height H1) where lead wire 47 is immersed in lubricating oil stored in internal space IS of housing 10. Protection area PA is an area below axis X of housing 10 in the direction of gravity, and is an area within a range of angle θ along circumferential direction CD around axis X. Protective tube 48 is disposed in lead wire 47 connected to one of a pair of ends (the end on the bobbin 44 side and the end on the bobbin 45 side) of coil portion 46 that is closer to suction port P1 (the end on the bobbin 44 side) in the direction along axis X.

[0029] Because the lead wires 47 do not come into direct contact with the lubricating oil when covered by the cable covers CA1, CA2, and CA3, there is no need to place the protective tube 48 in this area. On the other hand, in the area below height H1 that is not covered by the cable covers CA1, CA2, and CA3, the protective tube 48 is placed to cover the lead wires 47. This is to prevent the lead wires 47 from coming into direct contact with the lubricating oil.

[0030] The reason why the protective tube 48 is disposed only in the protection area PA will now be described with reference to Figures 5 and 6. Figure 5 is a cross-sectional view of the electric compressor 100 shown in Figure 3 taken along the line CC. Figure 6 is a cross-sectional view of the electric compressor 100 shown in Figure 3 taken along the line DD.

[0031] As shown in Fig. 5, in the protection area PA, a protective tube 48 is disposed at the end of the coil portion 46 supported by the support portion 44a of the bobbin 44 on the bottom portion 12 side in the direction of the axis X. A lead wire 47 having an outer diameter OD1 smaller than an inner diameter ID1 of the protective tube 48 is inserted inside the protective tube 48. As shown in Fig. 5, in the longitudinal direction LD parallel to the axis X, the length from the end of the stator 41 to the end of the protective tube 48 on the bottom portion 12 side is L1.

[0032] On the other hand, as shown in Fig. 6, in areas other than the protected area PA, no protective tube 48 is disposed at the end of the coil portion 46 supported by the support portion 44a of the bobbin 44 on the bottom 12 side in the direction of the axis X. A lead wire 47 having an outer diameter OD1 is disposed at the end of the coil portion 46. As shown in Fig. 6, in the longitudinal direction LD parallel to the axis X, the length from the end of the stator 41 to the end of the lead wire 47 on the bottom 12 side is L2, which is shorter than L1.

[0033] If the protective tube 48 is placed in an area other than the protected area PA, as shown in Fig. 5, the length from the end of the stator 41 to the end of the protective tube 48 will be L1, which will be longer than the length L2 when the protective tube 48 is not placed. In this case, the end of the motor 40 on the bottom 12 side will be closer to the bottom 12 than when the protective tube 48 is not placed. If the end of the motor 40 on the bottom 12 side is closer to the bottom 12, there is a possibility that a sufficient insulation distance from other components will not be maintained.

[0034] Therefore, in this embodiment, the protective tube 48 is disposed only in the protection area PA, thereby preventing the insulating distance from other components from being insufficiently maintained in areas other than the protection area PA.

[0035] The sealed terminal 50 is a member that is installed in the housing 10 and connected to the lead wire 47. The sealed terminal 50 is attached to seal the internal space IS of the housing 10 so that the internal space IS is maintained in a sealed state.

[0036] The retaining portion 80 is a member that is fixed to the housing 10 and that retains the first bearing 60. An end face of the retaining portion 80 on the bottom 12 side contacts the step portion 13 of the housing 10, and an end face of the retaining portion 80 on the opening 11 side contacts the compressor 30. By fixing the end housing 20 to the housing 10, the position of the retaining portion 80 in the direction of the axis X is fixed while the retaining portion 80 is sandwiched between the housing 10 and the compressor 30.

[0037] The electric compressor 100 of the present embodiment described above provides the following functions and effects. In the electric compressor 100 according to this embodiment, the lead wires 47 connected to one end of the coil portions 46 in the direction along the axis X are covered with a resin covering portion 47b. However, if the lead wires 47 are immersed in the lubricating oil stored in the internal space IS of the housing 10, they may be hydrolyzed and damaged by the moisture contained in the lubricating oil.

[0038] Therefore, in the electric compressor 100 according to this embodiment, a protective tube 48 that protects the lead wires 47 from moisture contained in the lubricating oil is arranged to surround the entire circumference of the lead wires 47 only in a partial protective area PA in the circumferential direction CD that includes an area where the lead wires 47 are immersed in the lubricating oil stored in the internal space IS of the housing 10. In the electric compressor 100 according to this embodiment, the protective tube 48 prevents the lead wires 47 from coming into direct contact with the lubricating oil, thereby preventing the coating portions 47b of the lead wires 47 from being damaged by hydrolysis and causing short circuits.

[0039] Furthermore, in the electric compressor 100 according to this embodiment, the protective tube 48 is disposed only in a partial protective area PA in the circumferential direction CD, which includes an area where the lead wire 47 is immersed in the lubricating oil stored in the internal space IS of the housing 10, and is not disposed in other areas. Therefore, in the other areas where the protective tube 48 is not disposed, the protective tube 48 is not disposed so as to surround the lead wire 47, and therefore the distance in the direction of the axis X between the lead wire 47 and other members adjacent to the end of the coil portion 46 is not shortened. Therefore, an appropriate insulation distance can be ensured between the lead wire 47 and other members adjacent to the end of the coil portion 46.

[0040] Furthermore, according to the electric compressor 100 of this embodiment, the housing 10 is fixed to the casing 200 with the axis X oriented horizontally, so that the lubricating oil contained in the refrigerant is stored in a region below in the direction of gravity. The protected region PA where the protective tube 48 is arranged is a region below the housing 10 in the direction of gravity, so that the lead wires 47 are prevented from coming into direct contact with the lubricating oil in the region below in the direction of gravity where the lubricating oil is stored, and it is possible to prevent the coating portions 47b of the lead wires 47 from being damaged by hydrolysis and causing a short circuit.

[0041] In the above description, the lead wire 47 may be protected from moisture contained in the lubricating oil by another member instead of the protective tube 48. For example, in the protective area PA, a resin material such as epoxy resin may be applied to the outer circumferential surface of the lead wire 47, hardened, and used as a protective member. If it is difficult to selectively apply the resin only to the outer circumferential surface of the lead wire 47, the resin may be applied to the entire portion of the end of the coil portion 46 that corresponds to the protective area PA.

[0042] Furthermore, the incompatibility of short circuiting caused by hydrolysis of the resin coating 47b of the lead wire 47 due to moisture contained in the lubricating oil is likely to occur in areas where the amount of refrigerant drawn in from the outside per unit time is greater than in other areas. Specifically, it is assumed that a short circuit caused by damage to the coating 47b is more likely to occur near the suction port P1.

[0043] Therefore, by providing a protective member such as the protective tube 48 only on the bobbin 44 side, which is closer to the suction port P1 in the direction of the axis X, of the bobbin 44 and the bobbin 45 as in the above-described embodiment, there is an effect of minimizing the number of additional parts required to prevent short circuits. Here, unlike the above-described embodiment, if the suction port P1 is provided at a position closer to the bobbin 45 side than to the bobbin 44 side, from this perspective, a protective member may be provided only on the bobbin 45 side.

[0044] Furthermore, when suction port P1 is provided in a portion corresponding to the midpoint between bobbin 44 and bobbin 45 in the direction of axis X, protective members may be provided on both the bobbin 44 side and the bobbin 45 side. In this case, when lead wire 47 is not provided on one of bobbin 44 and bobbin 45, a protective member made of a resin material or the like may be provided in an area of ​​the end of coil portion 46 that needs to be protected.

[0045] Furthermore, if the incompatibility caused by proximity to the suction port P1 is more serious than the incompatibility caused by refrigerant immersion described in the above embodiment, it is not necessarily necessary to provide a protective member in the area corresponding to the protection area PA, and a protective member may be provided near the suction port P1.

[0046] In the above embodiment, the protective member is provided only at a specific circumferential position, but it is also possible to provide the protective member around the entire circumferential circumference and then provide the overlapping protective member in a concentrated manner at a specific circumferential position. For example, if necessary, a resin material may be intermittently applied around the entire circumferential circumference of the end of the coil portion 46, and then the protective tube 48 may be provided overlappingly on the portion of the lead wire 47 connected to the coil portion 46 that corresponds to the circumferential protection area PA or on the portion of the lead wire 47 on the suction port P1 side. Furthermore, after providing protection with the protective tube 48 around the entire circumferential circumference, the protective tube 48 may be provided in double or triple layers on the portion that corresponds to the circumferential protection area PA or on the portion on the suction port P1 side.

[0047] The electric compressor according to the present embodiment described above can be understood, for example, as follows. The electric compressor (100) according to the present disclosure includes a housing (10) formed in a cylindrical shape extending along an axis (X), a compressor (30) disposed inside the housing and rotating about the axis to compress a refrigerant containing lubricating oil, and a motor (40) that drives the compressor to rotate about the axis, the motor including a stator (41) fixed inside the housing and having a plurality of teeth (41a) around which a coil is wound, a rotor (42) disposed on the inner periphery of the stator, and a rotor formed by winding the coil around the plurality of teeth. the housing includes a plurality of coil portions (46) connected to one end of the plurality of coil portions in a direction along the axis, a plurality of conductors (47) connected to one end of the plurality of coil portions in a direction along the axis, and a protective member (48) arranged to surround the entire circumference of the conductors and to protect the conductors from moisture contained in the lubricating oil, the conductors being covered with a resin covering portion (47b) and arranged along a circumferential direction (CD) around the axis, and the protective member being arranged only in a partial protective region (PA) in the circumferential direction including a region where the conductors are immersed in the lubricating oil stored in the internal space of the housing.

[0048] In the electric compressor according to the present disclosure, the plurality of conductors connected to one end of the plurality of coils in the axial direction are covered with a resin coating. However, when immersed in the lubricating oil stored in the interior space of the housing, the conductors may be damaged by hydrolysis due to moisture contained in the lubricating oil. Therefore, in the electric compressor according to the present disclosure, a protective member that protects the conductors from moisture contained in the lubricating oil is disposed around the entire periphery of the conductors only in a partial protective region in the circumferential direction, including the region where the conductors are immersed in the lubricating oil stored in the interior space of the housing. In the electric compressor according to the present disclosure, the protective member prevents the conductors from coming into direct contact with the lubricating oil, thereby preventing hydrolysis-induced damage to the conductor coating and the occurrence of a short circuit.

[0049] In addition, in the electric compressor according to the present disclosure, the protective member is disposed only in a circumferential protection region, including a region where the conductor is immersed in the lubricating oil stored in the internal space of the housing, and is not disposed in other regions. Therefore, in the other regions where the protective member is not disposed, the protective member is not disposed so as to surround the conductor, and therefore the axial distance between the end of the coil portion and other components adjacent to the end of the coil portion is not shortened. Therefore, an appropriate insulation distance can be ensured between the conductor and other components adjacent to the end of the coil portion.

[0050] The electric compressor according to the present disclosure may be configured to include a terminal (50) installed on the housing, and the conducting wire may be a lead wire connecting one end side of the plurality of coil portions in a direction along the axis to the terminal. According to the electric compressor of this configuration, it is possible to prevent damage to the resin coating of the lead wire connected to the coil portion and to ensure an appropriate insulation distance between the lead wire and other components.

[0051] In the electric compressor according to the present disclosure, the housing may be fixed to a casing (200) with the axis (X) arranged horizontally, and the protective area in which the protective member is arranged may be a lower area of ​​the housing in the direction of gravity.

[0052] In the electric compressor of this configuration, the housing is fixed to the casing with its axis oriented horizontally, so that the lubricating oil contained in the refrigerant is stored in a region below the direction of gravity. Furthermore, because the protective member is located in a protective region below the housing in the direction of gravity, the conductor is prevented from coming into direct contact with the lubricating oil in the region below the direction of gravity where the lubricating oil is stored, thereby preventing damage to the conductor coating due to hydrolysis and causing a short circuit.

[0053] In the electric compressor according to the present disclosure, the housing may be provided with an intake port through which the refrigerant is introduced from the outside, and the protective member may be arranged on the conductor connected to one of a pair of ends of the coil portion in a direction along the axis of the coil portion that is closer to the intake port. In the electric compressor having this configuration, the conductor connected to the end of the coil portion adjacent to the suction port is protected by the protective member, which prevents the coating of the conductor from being damaged by hydrolysis and causing a short circuit in the area adjacent to the suction port where the refrigerant flows more frequently than in other areas.

[0054] In the electric compressor having the above configuration, the protective member may be a tubular member made of a resin material. According to the electric compressor of this configuration, the relatively simple operation of inserting the conductor wires into the tubular protective member can prevent the coating of the conductor wires from being damaged by hydrolysis and causing a short circuit.

[0055] In the electric compressor having the above configuration, the protective member may be made of a resin material that is applied to an outer peripheral surface of the conductor and hardened. According to the electric compressor of this configuration, by applying a resin material to the outer peripheral surface of the conductor and then hardening it, it is possible to prevent the coating of the conductor from being damaged by hydrolysis and causing a short circuit. [Explanation of symbols]

[0056] 10. Housing 11 Opening 12 Bottom 13 Step section 14 Legs 20 End housing 21 Fastening bolt 30 Compressor 40 Motor 41 Stator 41a Teeth 42 rotor 43 Drive shaft 44,45 Bobbin 44a Support part 44b Fixed part 46 Coil section 47 Lead wire 47a core wire 47b Covering part 48 Protective tube (protective member) 50 Sealed terminal 60 First bearing 70 Second bearing 80 Holding part 100 Electric compressor 200 cabinets CA1, CA2, CA3 cable cover CD circumferential direction H1 Height ID1 Inner diameter IS interior space LD Longitudinal direction OD1 Outer diameter P1 Intake port P2 discharge port PA protection area X axis

Claims

1. a housing formed in a cylindrical shape extending along an axis; a compressor disposed inside the housing and rotating about the axis to compress a refrigerant containing lubricating oil; a motor that drives the compressor to rotate about the axis, The motor a stator fixed inside the housing and having a plurality of teeth around which coils are wound; a rotor disposed on the inner circumferential side of the stator; a plurality of coil portions formed by winding the coil around a plurality of the tooth portions; a plurality of conducting wires connected to the plurality of coil portions; a protective member that is arranged to surround the entire periphery of the conductor and protects the conductor from moisture contained in the lubricating oil, The conducting wire is covered with a resin covering and is arranged along a circumferential direction around the axis, The protective member is a tubular member formed from a resin material, and is arranged only in a partial protective area in the circumferential direction, including an area where the conducting wire is immersed in the lubricating oil stored in the internal space of the housing, so that the conducting wire does not come into direct contact with the lubricating oil.

2. a terminal disposed on the housing; 2. The electric compressor according to claim 1, wherein the conductor is a lead wire connecting one end of each of the coil portions in a direction along the axis to the terminal.

3. The housing is provided with a suction port through which the refrigerant is introduced from the outside, 3. The electric compressor according to claim 1, wherein the protective member is disposed on the conductor connected to one of a pair of ends of the coil portion in a direction along the axis of the coil portion that is closer to the suction port.

4. The housing is fixed to a housing with the axis aligned horizontally, The electric compressor according to claim 1 , wherein the protection area where the protection member is arranged is a lower area of ​​the housing in the direction of gravity.

5. An electric compressor described in any one of claims 1 to 4, wherein the outer diameter of the conductor is smaller than the inner diameter of the protective member.

6. An electric compressor described in any one of claims 1 to 5, wherein the thickness of the protective member is thicker than the thickness of the covering portion.

Images