KR102232268B1 - Motor operated compressor - Google Patents

Abstract

The present invention relates to an electric compressor, comprising a housing, a compression unit provided in the housing, a motor unit connected to the compression unit to drive the compression unit, coupled to one side of the housing, and the And an inverter part connected to the motor part so as to be energized, one side exposed into the inverter part, and the other side exposed into the housing, and one end connected to the other side of the hermetic terminal assembly, , The other end includes a plurality of bus bars connected to the motor unit, and includes a first insulating cover unit enclosing and sealing the airtight terminal assembly and the plurality of bus bars in the housing, so that the motor unit and the motor unit in the main housing It is to provide an electric compressor in which a conductor connecting the inverter unit is sealed from a refrigerant.

Description

Electric compressor {MOTOR OPERATED COMPRESSOR}

The present invention relates to a scroll type electric compressor driven by a motor.

Compressors that compress a refrigerant in a vehicle air conditioning system have been developed in various forms. In recent years, according to the trend of electrification of automobile parts, the development of electric compressors driven by electricity using a motor has been actively made.

A scroll compression method suitable for high-compression ratio operation is mainly applied to an electric compressor. Such a scroll type electric compressor (hereinafter, referred to as “electric compressor”) is composed of an electric unit, a compression unit, and a rotating shaft connecting the electric unit and the compression unit.

The electric unit is provided with a rotary motor, etc., and is installed inside the sealed casing. The compression unit is located on one side of the electric unit and consists of a fixed scroll and a revolving scroll. The rotation shaft is configured to transmit the rotational force of the electric unit to the compression unit.

Recently, a "low voltage high current" type electric compressor having a low voltage and high current of an input power source has been developed. This is due to the advantage of a low voltage high current method capable of charging in a short time, considering that an electric compressor is provided in a vehicle.

The driving part of the electric compressor is mainly a driving motor made of a three-phase induction motor. In such a driving motor, three coils are drawn out from the end coils of the driving motor in order to receive the three-phase (U, V, W phase) power from the inverter, which is the motor driving circuit, and terminals are provided at the ends of each drawn coil. do. The three terminals are detachably coupled to the motor-side terminal housing provided in the insulating housing of the drive motor.

In addition, an inverter-side terminal housing is provided in the inverter, and three output terminals are provided in the inverter-side terminal housing. Therefore, a connection terminal for transferring three-phase power from the inverter to the driving motor is required between the inverter and the driving motor. This connection terminal is usually called a 3-Phase Hermetic Terminal.

The conventional hermetic terminal is as disclosed in the prior art (Korean Laid-Open Patent Publication No. 10-2013-0057889, 2013.06.03.). The conventional hermetic terminal disclosed in the prior art has a shape in which the terminal connector is located between the side surface of the coil and the upper surface of the core and does not protrude in the axial direction from the coil.

However, in the conventional airtight terminal as described above, since the terminal connector to which the terminal and the coil are coupled is located on the side of the coil, the insulating area may be extended away from the coil. , Insulation may be destroyed by refrigerant and oil flowing into the inlet.

In addition, the conventional hermetic terminal is as disclosed in the prior art (Korean Registered Patent Publication No. 10-1936102, 2019.01.02.). The conventional airtight terminal disclosed in the prior art has a terminal slot provided in a terminal housing extending in the axial direction from the outer peripheral surface of the stator, and a cover is assembled after assembling a coil in the terminal slot.

However, in the hermetic terminal as described above, since gas or liquid refrigerant and oil may still flow into the assembly portion of the terminal and the slot, the insulation may be destroyed.

Prior art: Korean Patent Publication No. 10-2013-0057889, 2013.06.03.) Prior art: Korean Patent Registration No. 10-1936102, 2019.01.02.)

An object of the present invention is an electric compressor having a high insulation resistance by enclosing and sealing an airtight terminal assembly and a busbar connecting the inverter unit and the motor unit so that the metal part is not exposed to the refrigerant or oil inside the main housing. Is to provide.

Another object of the present invention is to provide an electric compressor capable of reducing the volume of an insulating member surrounding the bus bar by arranging the hermetic terminal and a plurality of bus bars connecting the assembly and the motor unit so as to overlap in the axial direction.

In addition, an object of the present invention is that the connection part of the lead wire of the winding coil wound on the motor part and the connection part of the bus bar are sealed and connected in the insulating cover part formed by protruding in the axial direction from the outer circumference of one side of the motor part. It is to provide an electric compressor that is not exposed to and has high insulation resistance.

In addition, an object of the present invention is an electric type that blocks the inflow of refrigerant or oil inside the main housing into the inverter by blocking and sealing the through hole for accommodating the hermetic terminal assembly through a sealing member and a plate. It is to provide a compressor.

Another object of the present invention is to provide an electric compressor that doubles the flow of refrigerant or oil inside the housing into the inverter by forming a secondary sealing member at a step portion supporting the sealing member.

Another object of the present invention is to provide an electric compressor with improved sealing force of the secondary sealing member by forming a step in the sealing groove into which the secondary sealing member is inserted.

In addition, an object of the present invention is provided with a separation prevention wall between the bolt hole for accommodating a bolt for fixing the plate and a step portion supporting the sealing member formed on one side of the main housing, preventing the sealing member from separating. It is to provide an electric compressor that can do.

In order to achieve the object of the present invention, the following solutions are provided.

In order to achieve the object of the present invention, an airtight terminal assembly in which one side is exposed into the inverter unit and the other side is exposed into the housing is provided between the motor unit and the inverter unit, and one end is provided with the other end of the airtight terminal assembly. Provides an electric compressor provided with a plurality of busbars connected to the side and connected to the motor at the other end, and having a first insulating cover part enclosing and sealing the hermetic terminal assembly and the plurality of busbars inside the housing. I want to.

Here, at least some of the plurality of busbars may be arranged to overlap in the axial direction.

In addition, the plurality of bus bars include a first bus bar having an axial extension portion and a radial extension portion, a second bus bar having an axial extension portion and a radial extension portion, and an axial extension portion and a radial extension portion. And a third bus bar, wherein the length of the axial extension portion of the second bus bar is longer than the first bus bar and shorter than the third bus bar, and the length of the circumferential extension portion of the second bus bar is a first bus It can be formed longer than the bar and shorter than the third bus bar.

Here, the hermetic terminal assembly is provided in the interior of the housing, and has a body member inserted into the through hole provided in the housing such that one side faces the inverter and the other side faces the inside of the housing, and the body member It is provided with a hollow insulating member penetrating, and is wrapped by the insulating member, one end protrudes from one side of the body member and the other end protrudes from the other side of the body member to be connected to one end of the bus bar. A conductive member may be provided, and the first insulating cover part may be sealed along an outer circumferential surface of the body member to seal the other side of the body member.

In addition, each of the plurality of bus bars may include a connection part connected to a lead wire of a winding coil provided in the motor part, and an end of the connection part may be exposed to the outside of the first insulating cover part.

Here, the end of the connection part may be enclosed and sealed by the second insulating cover part.

In addition, the second insulating cover portion includes an outer wall portion protruding from an outer circumference of one side of the motor portion toward the inverter portion and having a receiving groove for accommodating an end portion of the connection portion, and a sealing cover coupled to the outer wall portion. And the end of the connection part may be sealed by the first insulating cover part, the sealing cover, and the outer wall part.

Here, a coupling protrusion protruding in an axial direction is formed on the outer wall portion, and a coupling concave portion recessed in the axial direction is formed in the sealing cover, so that they may be coupled to each other.

In addition, in order to achieve the object of the present invention, a plate hole for accommodating the insulating member is formed, a plate covering the through hole is provided, and a predetermined depth is depressed along the outer periphery of the through hole at one side of the housing. It has an annular first stepped portion, and has an annular second stepped portion recessed a predetermined depth along the outer periphery of one side of the body member, and the outer periphery of one side is supported by the first step, and the inner periphery of one side The side is supported by the second step, and the other side in the opposite direction of one side may be provided with an electric compressor having an annular first sealing member supported by the plate.

In addition, an annular sealing groove may be formed in each of the first and second stepped portions, and a second annular sealing member may be inserted into each of the annular sealing grooves.

Here, the height of the inner surface of the annular sealing groove formed in the first stepped portion may be lower than the outer surface, and the height of the outer surface of the annular sealing groove formed in the second stepped portion may be formed lower than that of the inner surface.

Here, a first bolt hole is formed on one side of the housing and spaced a predetermined distance from the first step, and a second bolt hole corresponding to the first bolt hole is formed in the plate, and the plate includes first and second bolt holes. 2 It can be coupled to the housing by a bolt accommodated in the bolt hole.

In addition, a separation prevention wall may be formed between the first stepped portion and the first bolt hole.

In addition, in order to achieve the object of the present invention, an airtight terminal assembly in which one side is exposed into the inverter unit and the other side is exposed into the housing is provided between the motor unit and the inverter unit, and is formed in a hollow shape, and the A plurality of insulating members surrounding a plurality of conductive members are provided, one end is connected to the other side of the conductive member, the other end is provided with a plurality of bus bars connected to the motor unit, and one side is directed to the inverter unit. An electric compressor may be provided that is inserted into a through hole formed in the housing and has an insulating cover part enclosing and sealing the plurality of conductive members, the plurality of insulating members, and the plurality of bus bars in the housing.

In addition, each of the plurality of bus bars may include a connection part connected to a lead wire of a winding coil provided in the motor part, and an end of the connection part may be exposed to the outside of the insulation cover part.

Here, the motor unit has an outer wall portion protruding from an outer periphery of one side of the motor portion toward the inverter portion and having a receiving groove for accommodating an end portion of the connection portion, a sealing cover coupled to the outer wall portion, and an end portion of the connection portion May be sealed by the insulating cover part, the sealing cover, and the outer wall part.

In addition, a plate hole for accommodating the insulating member is formed, a plate covering the through hole is provided, and an annular first step recessed to a predetermined depth along an outer circumference of the through hole is provided on one side of the housing, An annular second step recessed at a predetermined depth along an outer periphery of one side of the insulating cover portion is provided, and an outer periphery of one side is supported by the first step, and an inner periphery of one side is supported by the second step. And, the other side in the opposite direction of one side may include an annular first sealing member supported by the plate.

The electric compressor according to the present invention includes an airtight terminal assembly and a busbar connected thereto to energize the inverter unit and the motor unit, and the airtight terminal assembly exposed to the inside of the main housing and the busbar connected thereto are provided along the outer circumferential surface. 1 By enclosing and sealing the insulating cover part, it is possible to prevent the conductive member and the bus bar of the hermetic terminal assembly formed of a conductive metal from being exposed inside the main housing. By preventing exposure of the metal part, high insulation resistance can be provided.

In addition, the electric compressor according to the present invention connects the hermetic terminal, the assembly, and the motor unit by a plurality of busbars extending in the axial and circumferential directions, and the portions extending in the circumferential direction of the plurality of bus bars are arranged to overlap each other in the axial direction. By doing so, it is possible to reduce the volume of the first insulating cover part surrounding the bus bar, thereby reducing production cost and miniaturizing the compressor.

In addition, the electric compressor according to the present invention is sealed in the receiving groove in the second insulating cover part formed by protruding in the axial direction from the outer periphery of one side of the motor part, the connection part of the lead wire of the winding coil wound on the motor part and the bus bar, It is a metal having a and can prevent the connection part of the bus bar from being exposed inside the main housing. By preventing exposure of the metal part, high insulation resistance can be provided.

In addition, the electric compressor according to the present invention covers the through hole of the main housing with a plate, and inserts the primary sealing member into a space consisting of the plate, the first step portion formed in the main housing, and the second step portion formed in the hermetic terminal assembly. By sealing it, it is possible to prevent the refrigerant or oil inside the main housing from flowing into the inverter and contacting the conductive member protruding toward the inverter. This can provide high insulation resistance.

In addition, the electric compressor according to the present invention prevents the refrigerant or oil in the main housing from leaking into the gap of the primary sealing member by forming a secondary sealing member at the first and second step portions supporting the sealing member. , It is possible to improve the sealing effect between the main housing and the inverter unit. Through this, it is possible to prevent the refrigerant or oil in the main housing from flowing into the inverter to contact the conductive member protruding toward the inverter, and to provide high insulation resistance.

In addition, the electric compressor according to the present invention forms a step so that the axial height of the surface into which the refrigerant flows is lower among opposite sides of the sealing groove into which the secondary sealing member is inserted, and the secondary sealing is performed by the pressure of the refrigerant. By pressing the member, the sealing effect of the secondary sealing member can be improved.

In addition, the electric compressor according to the present invention is formed on one side of the main housing and has a separation prevention wall between the bolt hole for receiving the bolt for fixing the plate and the step portion for supporting the sealing member, so that the sealing member is combined with the bolt. It can be prevented from being dragged into the bolt hole and damaged, and it is possible to prevent the sealing member from being separated from the bolt hole and damaged by the pressure of the refrigerant inside the main housing.

1 is a cross-sectional view showing an electric compressor according to the present invention.
2A is a perspective view showing a three-phase airtight terminal of the electric compressor according to the present invention.
2B is an exploded view of the three-phase airtight terminal shown in FIG. 2A.
3A is a perspective view showing a three-phase airtight terminal of the electric compressor according to the present invention.
FIG. 3B is a cross-sectional view taken along line I-I of FIG. 3A.
Fig. 3C is a cross-sectional view taken along line II-II of Fig. 3A.
4A is a perspective view showing a hermetic terminal and a motor part according to the present invention.
Figure 4b is a perspective view showing a motor unit coupled to the hermetic terminal according to the present invention.
5 is a perspective view illustrating a motor unit in which a sealing cover is coupled to the motor unit of FIG. 4B.
6 is an exploded view showing the disassembled plate-housing-motor part according to the present invention.
7 is a combined view showing a combined plate-housing-motor part according to the present invention.
8A is a cross-sectional view showing a cross section taken along line III-III of FIG. 7.
Fig. 8B is an enlarged view showing an enlarged portion C of Fig. 8A.
9 is a cross-sectional view showing a cross section taken along IV-IV of FIG. 7.

Prior to describing the present invention, terms to be used below will be described.

The term "annular shape" used in the present invention means a shape having an inner periphery and an outer periphery. For example, the outer periphery and the inner periphery may have different curvatures, and may have a polygonal outer periphery and a circular inner periphery.

In addition, the term "axial direction" used in the present invention means the longitudinal direction of the rotating shaft 330 or the longitudinal direction of the main housing 110 to be described later.

In addition, the term "circumferential direction" used in the present invention is a direction of rotation along the circular side of the cylindrical main housing 110 to be described later, and may be clockwise or counterclockwise.

In addition, the term "radial direction" used in the present invention means a direction from a rotation axis to be described later toward the circular side of the cylindrical main housing 110.

Hereinafter, an electric compressor according to the present invention will be described in detail with reference to an embodiment shown in the accompanying drawings.

1 is a cross-sectional view showing the inside of an electric compressor according to the present invention. 1 illustrates an electric compressor using a refrigerant 134A as an example, but may also be applied to an electric compressor using a _{carbon dioxide (CO 2) refrigerant.}

Referring to FIG. 1, an electric compressor according to an embodiment of the present invention includes a housing 100, a compression unit 200, a motor unit 300, an inverter unit 400, and an airtight terminal assembly 500.

The housing 100 forms the exterior of an electric compressor. The inner space of the housing 100 is sealed, and the compression unit 200 and the motor unit 300, and a part of the hermetic terminal assembly 500 are accommodated in the inner space of the housing 100. The inverter unit 400 is installed outside the housing 100 and is electrically connected to the motor unit 300 using the hermetic terminal assembly 500.

As the housing 100 is disposed in a transverse direction with respect to the ground, the compression unit 200 and the motor unit 300 are arranged along the transverse direction, and the compression unit 200 is on the rear side, and the motor unit 300 is on the front side. It is placed on each side. In FIG. 1, the right side is defined as front and the left side is defined and described.

Referring to FIG. 1, a housing 100 according to an embodiment of the present invention includes a main housing 110 forming a motor chamber S1, a discharge chamber S2, and a rear housing 120 forming an oil separation chamber. Includes. The rear end of the main housing 110 and the front end of the rear housing 120 are coupled to each other to seal the inner space of the housing 100.

The main housing 110 has an intake port (not shown) through which it communicates with the motor chamber S1. The intake port is formed to pass through the front vicinity of the main housing 110 in the direction of the inverter part 400 based on the compression part 200. Accordingly, the refrigerant sucked into the motor chamber S1 through the intake port passes through the motor unit 300 and is sucked into the compression unit 200.

The rear housing 120 is coupled to the main housing 110 at the rear side of the fixed scroll 220 to be described later. The rear housing 120 is provided with an exhaust port 121 communicating with the oil separation chamber to discharge the oil-separated refrigerant to a condensation port (not shown). Accordingly, the refrigerant discharged to the discharge chamber S2 is discharged to the outside of the compressor through the exhaust port 121 after separating the oil in the oil separation chamber.

Next, a description will be given of the compression unit 200 according to an embodiment of the present invention.

Referring to FIG. 1, the compression unit 200 according to an embodiment of the present invention includes a frame 210, a fixed scroll (or first scroll) 220 fixed to the frame 210, and a frame 210. It includes an orbiting scroll (or a second scroll) 230 provided between the fixed scrolls 220.

The frame 210 is fixedly installed in the middle of the main housing 110. The frame 210 is provided at the rear side of the motor unit 300 to support the rotation shaft 330 to be described later in the radial direction and at the same time support the orbiting scroll 230 in the axial direction.

The frame 210 is formed in a disk shape. The frame 210 may be fixed by welding to the main housing 110, or may be fixed between the main housing 110 and the rear housing 120 by using a fastening force between the two housings 110 and 120. have.

A bearing accommodating part 211 accommodating the main bearing 171 is formed in the center of the rear surface of the frame 210, and a shaft hole 212 accommodating the rotating shaft 350 is formed at the center of the bearing accommodating part 211. It is formed through in the direction.

Here, the main bearing 171 may be formed of a bush bearing, but may be formed of a deep groove ball bearing as shown in FIG. 1. As the main bearing 171 is made of a ball bearing, the rotation shaft 330 passing through the shaft hole 212 of the frame 210 is supported in the radial and axial directions by the main bearing 171.

In addition, the first sealing member 181 is inserted into the front end of the bearing hole 212. The first sealing member 181 is formed in a U-shaped cross-sectional shape, and is formed in an annular shape to surround the outer circumferential surface of the rotation shaft 330. Accordingly, the first sealing member 181 seals the second sealing member 182 and the back pressure chamber S3, which will be described later.

In addition, the refrigerant sucked into the motor chamber S1 of the main housing 110 passes through the edge of the frame 210 and is guided to the compression unit 200. Accordingly, the refrigerant sucked into the motor chamber S1 is sucked into the compression chamber V.

In addition, a rotation preventing mechanism 213 for preventing rotation of the orbiting scroll 230 is provided between the bearing receiving portion 214 and the suction guide groove 2221 on the rear surface of the frame 210. As the anti-rotation mechanism, an Oldham ring or a pin-and-ring structure may be applied. Since this is a technology widely known in the electric compressor, a detailed description thereof will be omitted.

Referring to FIG. 1, the fixed scroll 220 is fixed between the main housing 110 and the rear housing 120 together with the frame 210, and the orbiting scroll 230 is coupled to the rotation shaft 330 to form a frame ( 210) and the fixed scroll (220) to rotate between. Accordingly, the fixed scroll 220 is fixedly coupled to the housing 100 to form a compression chamber V including two pairs of suction pressure chambers, intermediate pressure chambers, and discharge pressure chambers together with the orbiting scroll 230.

The fixed scroll 220 according to an embodiment of the present invention includes a fixed plate part 221, a side wall part 222, and a fixed wrap 223.

The fixed plate portion 221 is formed in an approximately disk shape. However, a fastening groove (not shown) may be formed on the outer circumferential surface of the fixed plate part 221 so that a fastening protrusion (unsigned) protruding from the inner circumferential surface of the housing 100 is engaged and inserted.

Further, a discharge port 2211 is formed in the vicinity of the center of the fixed plate portion 221. The discharge port 2211 discharges the refrigerant from the discharge pressure chamber, which is the final compression chamber, to the discharge chamber S2, and a check valve 225 for closing the discharge port 2211 is installed on the rear surface of the fixed plate portion 221.

The side wall portion 222 is formed in an annular shape by extending a predetermined height along the circumferential direction from the edge of the front surface of the fixed plate portion 221. A suction guide groove 2221 is formed along the axial direction on the outer circumferential surface of the side wall part 222, and a suction port 2222 penetrating the side wall part 222 is formed in the middle of the suction guide groove 2221.

In addition, the axial height of the side wall portion 222 is formed higher than the axial height of the fixing wrap 223 to be described later, and the inner diameter of the side wall portion 222 is formed larger than the outer diameter of the turning plate portion 231. Accordingly, the orbiting scroll 230 is inserted into the side wall portion 222 of the fixed scroll 220 to perform a orbiting motion.

The fixing wrap 223 is formed integrally extending from the front surface of the fixing plate part 221. The fixed wrap 223 may be formed in various ways, such as an involute shape, a logarithmic spiral shape, or a non-involute shape, like the orbiting wrap 232 to be described later. This is a technology well known in the electric compressor, so a detailed description thereof will be omitted.

Referring to FIG. 1, the orbiting scroll 230 is inserted into the frame 210 and supported in the axial direction, and includes an orbiting plate part 231 and a orbiting wrap 232.

The turning plate portion 231 is formed in an approximately disk shape. The outer diameter of the orbiting plate portion 231 is formed smaller than the inner diameter of the side wall portion 222 of the fixed scroll (22). Accordingly, the orbiting scroll 230 is inserted into the fixed scroll 220. However, this may differ depending on the type of compressor. For example, the orbiting plate portion 231 may be formed larger than the inner diameter of the side wall portion 222 of the fixed scroll 220 to form a front surface and a thrust surface of the side wall portion 222 of the fixed scroll 220.

In addition, on the rear surface of the turning plate portion 231, a turning wrap 232 that meshes with the fixing wrap 223 is formed. Accordingly, the rear surface of the turning plate part 231 forms a compression chamber V together with the turning wrap 232. The compression chamber (V) is formed so that the suction pressure chamber, the intermediate pressure chamber, and the discharge pressure chamber are continuously connected from the outside to the inside.

A second sealing member 182 for radially sealing the space between the frame 210 and the frame 210 is coupled to an edge of the front surface of the turning plate portion 231. The second sealing member 182 seals the back pressure chamber S3 together with the first sealing member 181 described above.

A back pressure hole 2311 for communicating the intermediate pressure chamber to the back pressure chamber S3 is formed in the central portion of the turning plate portion 231. Accordingly, the refrigerant and oil move between the back pressure chamber S3 and the intermediate pressure chamber V according to the difference between the pressure of the back pressure chamber S3 and the pressure of the intermediate pressure chamber V.

The orbiting wrap 232 is formed integrally extending from the rear surface of the orbiting plate portion 231. Like the fixed wrap 223 described above, the revolving wrap 232 may be variously formed according to the shape of the compressor, such as an involute shape, a logarithmic spiral shape, or a non-involute shape. For this, as in the fixed wrap, a detailed description will be omitted.

In addition, a boss portion 233 is formed in the center of the front surface of the turning plate portion 231, and an eccentric bearing 173 is inserted and coupled to the boss portion 233. The eccentric bearing 173 may be a bush bearing or a ball bearing.

Next, a motor unit according to an embodiment of the present invention will be described.

The motor unit 300 according to an embodiment of the present invention is accommodated in the motor chamber S1 of the main housing 110, and the compression unit 200 provides power for compressing the refrigerant. The motor unit 300 is operated by power applied from the inverter unit 400 and may be controlled by a control signal. The motor unit 300 is electrically connected to the inverter unit 400 by an airtight terminal assembly 500 to be described later. This will be described later.

Referring to FIG. 1, the motor unit 300 according to an embodiment of the present invention is connected to the compression unit 200 by a rotation shaft 330 to be described later. One end of the rotation shaft 330 is coupled to the rotor 320 of the motor unit 300 to be described later, and the other end is coupled to the orbiting scroll 230. Accordingly, the rotational force generated by the motor unit 300 may be transmitted to the orbiting scroll 230 of the compression unit 200 by the rotation shaft 330.

The motor unit 300 includes a stator 310 fixed to the housing 100 and a rotor 320 rotatably provided on the stator 310.

The stator 310 forms an electromagnetic field by power applied from the inverter unit 400. The rotor 320 is rotated by the electromagnetic field formed by the stator 310 to generate a rotational force for rotating the orbiting scroll 230 of the compression unit 200.

The stator 310 includes a stator core 311, a winding coil 312 wound around the stator core 311, and an inner wall portion 313 insulating between the stator core 311 and the winding coil 312.

The stator core 311 is fixedly installed on the inner circumferential surface of the main housing 110 constituting the motor chamber S1. Accordingly, the stator 310 does not rotate itself even when power and control signals are applied from the inverter unit 400.

The stator core 311 is formed in a cylindrical shape by stacking a plurality of thin electrical steel sheets in an annular shape in the axial direction. Accordingly, the stator core 311 is formed in a hollow shape and has a rotor accommodating portion 3111 at the center thereof. The rotor 320 is rotatably inserted into the rotor receiving portion 3111.

In addition, a plurality of teeth in the circumferential direction are continuously formed on the inner circumferential surface of the stator core 311 with the slit interposed therebetween. A three-phase coil is wound on the tooth in a concentrated or distributed winding to form a winding coil 312.

The winding coil 312 has end coils 3121 and 3122 formed at both ends of the stator core 311 in the axial direction, and a three-phase coil is drawn out from the front end coil 3121 among both end coils. The ends of the drawn three-phase coils 3123 are each coupled to a connection part of a busbar to be described later, and the busbar is wrapped and sealed by first and second insulating covers to be described later, and the first insulation The cover part is fixed by engaging the inner wall part extending in the axial direction from the inner circumferential surface of the stator. This will be described later.

The coil insulating members 313, 314, 315 are generally referred to as insulators, and are formed of an insulating material such as plastic. The coil insulating members 313, 314, 315 pass through the stator core 311 or are coupled to both ends of the stator core 311, respectively.

When coupled to both ends of the stator core 311, one side of the coil insulating member 313, 314, 315 is inserted into and coupled to each slit (not shown), and the other side is axially directed from the inner and outer circumferential surfaces, respectively. It is extended to form inner wall portions 313 and outer wall portions 314 and 315. The winding coil 312 passes through a slot between the inner wall portion 313 and the outer wall portions 314 and 315 and is wound on each tooth.

An airtight terminal assembly 500, a bus bar 610, and a first insulating cover 650, which will be described later, may be engaged and coupled to the inner wall portion 313 and the outer wall portions 314 and 315 positioned at the front side. The three-phase coil 3123 described above is coupled to the connection portion of the bus bar 610.

In the hermetic terminal assembly 500, one side protrudes into the inverter unit 400, the other side protrudes into the main housing 110, and the bus bar 610 is between the hermetic terminal assembly 500 and the motor unit 300. Connect so that it can be energized. Inside the main housing 110, the hermetic terminal assembly 500 and the bus bar 610 are wrapped and sealed by the first insulating cover part 650.

The rotor 320 is disposed to be spaced apart from the stator 310 by a predetermined air gap. Accordingly, while the stator 310 is fixed, the rotor 320 may be rotated by the electromagnetic field.

The rotor 320 includes a rotor core 321 and a permanent magnet (not shown).

The rotor core 321 is formed by stacking a plurality of thin electrical steel sheets in an axial direction in an annular shape like the stator core 311. The rotor core 321 is formed in a hollow shape, and a rotation shaft receiving portion 3211 is formed at the center thereof.

A plurality of permanent magnets are embedded and coupled around the rotating shaft receiving portion 3211, and magnetic path barriers (not shown) are formed around the center of the permanent magnet or around the end of the permanent magnet. Accordingly, the rotor is rotated by an electromagnetic field formed by the winding coil 312 of the stator 310 by applying power from the inverter unit 400.

The rotation shaft 330 is coupled to the rotation shaft receiving portion 3211 by hot pressing. Depending on the shape of the compressor, both ends of the rotating shaft 330 may be supported in a radial direction with the motor unit 300 interposed therebetween, or may be supported in a radial direction from one side of the motor unit 300. 1 is a structure in which the rotation shaft 330 is supported on both sides of the motor unit 300.

Next, an inverter unit according to an embodiment of the present invention will be described.

Referring to FIG. 1, the inverter unit 400 according to an embodiment of the present invention controls the operation of the electric compressor 10 by applying or releasing power and control signals to the motor unit 300. The inverter unit 400 receives power and control signals from the outside and transmits them to the motor unit 300. Accordingly, the inverter unit 400 is connected to the motor unit 300 to be energized. The hermetic terminal assembly 500 for energizing the inverter unit 400 and the motor unit 300 will be described later.

The inverter unit 400 according to the present embodiment is installed on the front side of the main housing 110. However, the inverter unit 400 is not necessarily installed only on the front side of the main housing 110. For example, the inverter unit 400 may be installed on the side of the main housing 110. That is, the inverter unit 400 may be installed at any position as long as it can energize the motor unit 300.

In addition, power and control signals may be applied to the inside of the inverter unit 400. In order to prevent unnecessary energization from the outside and noise of the control signal from being generated, the exterior of the inverter unit 400 may be formed of an insulating material. As an example, a member forming the exterior of the inverter unit 400 may be formed of synthetic resin or the like.

The inverter unit 400 according to an embodiment of the present invention includes an inverter housing 410, an inverter cover 420, and an inverter unit 430.

The inverter housing 410 is coupled to the inverter cover 420 to form the outside of the inverter unit 400. The inverter housing 410 is coupled to the front side of the main housing 110. As the rear side of the inverter housing 410 is opened, the inverter housing 410 is covered by the front side of the main housing 110. A rotation shaft support part 118 is provided in the center of the front surface of the main housing 110 facing the motor part 300, and a through hole is provided in the front edge of the main housing 110 so that the airtight terminal assembly 500, which will be described later, is inserted. (Shown in FIG. 6) 114 may be formed. This will be described later.

The inverter cover 420 is coupled to the inverter housing 410, and the inverter housing 410 is coupled to the front side of the main housing 110. Accordingly, an inverter chamber is formed between the inverter cover 420, the inverter housing 410, and the front side of the main housing 110, so that the inverter unit 430 may be accommodated.

In addition, the inverter cover 420, the inverter housing 410, and the main housing 110 may be coupled by separate fastening means (not shown). It is preferable that the shapes of the inverter cover 420 and the main housing 110 are formed to correspond to the shapes of the inverter housing 410.

Inverter unit 430 is a printed circuit board (PCB) 431, the printed circuit board 431

It includes a semiconductor device to be attached (unsigned) and a terminal coupling module (unsigned).

Since the basic structure, coupling relationship, and operation of the printed circuit board 431, the semiconductor device, and the terminal coupling module are widely known in the inverter compressor, a description thereof will be omitted.

Next, an airtight terminal assembly, a bus bar, and a first insulating cover portion according to an embodiment of the present invention will be described.

Referring to FIGS. 2 to 3 with respect to the hermetic terminal assembly 500, the bus bar 610, and the first insulating cover part 650 according to an embodiment of the present invention. For convenience of explanation, the front of FIG. 1 means the lower side of FIGS. 2 and 3, and the front of FIG. 1 means the upper side of FIGS. 2 and 3.

2A is an exploded perspective view showing an airtight terminal assembly 500 and a bus bar 610 in an electric compressor according to an embodiment of the present invention.

The hermetic terminal assembly 500 according to an embodiment of the present invention accommodates a plurality of conductive members 510, a hollow insulating member 521 surrounding the plurality of conductive members 510, and a hollow insulating member 521. It includes a body member.

The conductive member 510 may be formed in a cylindrical shape. In addition, the conductive member may have a shape in which one end and the other end may protrude into the inverter unit 400 and the main housing 110, respectively, by being wrapped in a hollow insulating member 521 such as a polygonal column shape or a pin shape.

The hollow insulating member 521 has an inner circumferential surface and an outer circumferential surface, and the conductive member 510 is wrapped by the inner circumferential surface of the insulating member 521. The conductive member 510 is supported in a radial direction by an inner circumferential surface of the insulating member 521.

The body member 520 accommodates a hollow insulating member 521 surrounding a plurality of insulating members, and the conductive member 510 and the hollow insulating member 521 are inserted into the body member so that one side thereof is the inverter unit 400 As, the other side protrudes into the main housing 110. That is, one end of the conductive member 510 protrudes from the front side of the body member 520 and the other end protrudes from the rear side of the body member 520.

In an embodiment according to the present invention, in order to receive three-phase (U, V, W phase) power from an inverter that is a motor driving circuit, the plurality of conductive members 510 are connected to the first and second phases, respectively. It may include second and third conductive members 511, 512, and 513. The first, second, and third conductive members 511, 512, 513 are accommodated in the hollow insulating member 521 so that one end thereof is exposed to the inverter unit 400, and the other end is exposed to the main housing. . That is, one end of the first, second and third conductive members 511, 512, 513 protrudes forward of the body member 520, and the other end protrudes to the rear of the body member 520.

The conductive member 510 protruding toward the front side of the hermetic terminal assembly 500 is connected to the inverter unit 400 so as to be energized, and the conductive member 510 protruding toward the rear side of the hermetic terminal assembly 500 is the main housing 110. ) Is connected to one side of the bus bar 610 located inside the bus bar 610 to be energized, and the other side of the bus bar 610 is connected to the motor unit 300 to be energized. Through this, the inverter unit 400 and the motor unit 300 are connected to be energized.

The bus bar 610 is formed in a plurality, and the plurality of bus bars 610 includes a plurality of receiving portions accommodating the other ends of the plurality of conductive members 510, and in the axial direction and the circumferential direction from the plurality of receiving portions. Is extended. That is, the plurality of bus bars 610 may include a plurality of connecting portions extending in the axial direction at different lengths from the plurality of receiving portions and extending in the circumferential direction at different lengths. The connection part is formed by extending radially from the end or the middle of the connection part, and the connection part is connected to the motor part so as to be energized. A plurality of connection portions may be formed extending in a radial direction from one connection portion.

In an embodiment of the present invention, the plurality of bus bars 610 may include first, second, and third bus bars 611, 612, and 613. The first, second, and third bus bars 611, 612, 613 are first, second, and third accommodating portions capable of accommodating the first, second and third conductive members 511, 512, 513 (6111, 6121, 6131) are provided, respectively, from which the first, second, and third vertical extensions (6112, 6122, 6132) extend in the axial direction, and the first, second, and third vertical extensions The first, second, and third horizontal extension portions 6113, 6123, and 6133 extend in the circumferential direction from the ends of the extension portions 6112, 6122, and 6132, respectively.

The first accommodating part 6111 is formed in an annular shape to accommodate the other end of the first conductive member 511, and the diameter of the inner circumferential surface of the first accommodating part 6111 is equal to the diameter of the first conductive member 511 It is formed equal to or slightly smaller. Through this, the first conductive member 511 is press-fitted to be firmly fixed to the first accommodating portion 6111, thereby preventing the connection portion from being separated from each other. Then, when current flows to the connection part, overheating of the connection part can be prevented. The second and third accommodating portions 6121 and 6131 are formed in the same manner as the first accommodating portion 6111.

A first vertical extension part 6112 extends in the axial direction from the first accommodation part 6111. That is, the first vertical extension part 6112 extends rearward from the first accommodation part 6111. The first horizontal extension 6113 extends in the circumferential direction from the rear end of the first vertical extension 6112. That is, the first horizontal extension part 61113 extends along the outer wall part 315 extending in the axial direction from the front end of the stator 310.

The first vertical extension 6112 may be formed as a rectangular plate consisting of a short side and a long side, and the first horizontal extension 6113 may be formed as a plate consisting of a short side and a long side curved along the circumferential direction.

For convenience, the height of the plate is called the thickness, and the length of the short side of the plate is called the width. The short side of the first vertical extension 6112 and the long side of the first horizontal extension 6113 may be vertically connected to the first accommodating portion 6111. That is, since the first accommodating portion 6111 and the first horizontal extension portion 6113 overlap in the axial direction, the volume of the first insulating cover, which will be described later, can be reduced.

The first connection part 6115 extends in the radial direction from the end of the first horizontal extension part 6113. The first connection part 6115 extends to a length that can be inserted into the support groove 3152 formed in the outer wall part 315 to be described later. In addition, the first connection part 6114 may extend in a radial direction from the middle of the first horizontal extension part 6113. That is, a plurality of connection portions may extend in the radial direction from the first horizontal extension portion 6113.

The second and third bus bars 612 and 613 are formed similarly to the first bus bar 611. However, the axial length of the second vertical extension 6122 is longer than the axial length of the first vertical extension 6112, and the axial length of the third vertical extension 6132 is the second vertical extension It is formed longer than the axial length of (6122).

In addition, the circumferential length of the second horizontal extension 6123 is formed longer than the circumferential length of the first horizontal extension 6113, and the circumferential length of the third horizontal extension 6133 is the second horizontal extension It is formed longer than the circumferential length of (6123).

Through this, the first, second and third vertical extension portions 6112, 6122, and 6132 are disposed with a predetermined height difference in the axial direction from each other. That is, the first horizontal extension part 6113 and the second horizontal extension part 6123 are spaced apart from each other in the axial direction by the axial length difference between the first vertical extension part 6112 and the second vertical extension part 6122, The second horizontal extension 6123 and the third horizontal extension 6133 are spaced apart from each other in the axial direction by an axial length difference between the second vertical extension 6122 and the third vertical extension 6132, and the first , The second and third vertical extensions 6112, 6122, 6132 are disposed so that at least some of them overlap in the axial direction.

Then, the volume of the first insulating cover part 650 that wraps and seals the first, second, and third bus bars 610 may be reduced. This will be described in detail later.

The first connection portions 6114 and 6115 extend radially from the first horizontal extension portion 6113. The second connection portions 6112 and 6125 extend radially from the second horizontal extension 6123, extend in the axial direction by the difference in the axial height from the first horizontal extension 6113, from which the radial direction Is extended to. The third connection portions 6134 and 6135 extend radially from the third horizontal extension 6133, extend in the axial direction by the difference in the axial height from the first horizontal extension 6113, from which the radial direction Is extended to. That is, the second and third connection portions are shaped to extend in a stepped shape.

Through this, the end portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a of the first, second and third connection portions extend toward the outer wall portion 315 to be described later at the same height, and are formed on the outer wall portion 315. Each of the receiving grooves 3152 may be inserted and supported.

Then, the outer wall portion 315 and the sealing cover 316 that is assembled to seal the first, second and third connection portions 6114, 6115, 6124, 6125, 6134, 6135 can be formed more easily. , It is possible to prevent more load from being applied to any one of the first, second, and third connection units 6114, 6115, 6124, 6125, 6134, 6135 when the compressor is operated. This will be described in detail later.

2B is a perspective view illustrating a combination of an airtight terminal assembly 500, a bus bar 610, and a first insulating cover part 650 in an electric compressor according to an embodiment of the present invention.

The first, second, and third conductive members 510 are wrapped by a hollow insulating member 521 and inserted into one side of the body member 520 at predetermined intervals, so that one end thereof is toward the inverter unit 400. , The other end is coupled to protrude toward the main housing 110. The body member 520 may be molded to surround the hollow insulating member 521. Alternatively, the body member 520 is formed with an insertion hole having a size substantially the same as the outer diameter of the hollow insulating member 521 so that the hollow insulating member 521 may be press-fitted into the insertion hole.

The other end of the conductive member 510 protruding into the main housing 110 is connected to the receiving portions 6111, 6121, 6131 of the bus bar 610. In the receiving portions 6111, 6121, 6131, a receiving hole into which the other end of the conductive member 510 is inserted is formed, and the diameter of the receiving hole is formed substantially the same as the diameter of the conductive member 510. In order to prevent excessive increase in resistance on the contact surface between the receiving portions 6111, 6121, 6131 and the conductive member 510, the contact surface between the receiving portions 6111, 6121, 6131 and the conductive member 510 has a predetermined width or more. It can be formed as

Ends of the first, second and third conductive members 510 may be located on the same plane perpendicular to the axial direction. The plurality of receiving portions 6111, 6121, 6131 in which the receiving holes are formed are also positioned at predetermined intervals on the same plane perpendicular to the axial direction, and the first, second, and second receiving portions 6111, 6121, 6131 3 Vertical extensions 6112, 6122, 6132 extend downward. The first, second and third vertical extension portions 6112, 6122, 6132 may be formed in a plate shape having a narrow width and a long length, and the first, second and third vertical extension portions 6112, 6122, 6132 The length of) increases sequentially. That is, the end of the first vertical extension 6112 is in the axial direction than the end of the second vertical extension 6122, and the end of the second vertical extension 6122 is greater than the end of the third vertical extension 6132 It is located in the front.

The first, second and third vertical extensions 6112, 6122 and 6132 extend from ends of the first, second and third vertical extensions 6112, 6122, and 6132. The first, second, and third vertical extension portions 6112, 6122, and 6132 are formed in a plate shape having a narrow width and a long length. The short sides of the first, second, and third vertical extensions (6112, 6122, 6132) and the long sides of the first, second, and third vertical extensions (6112, 6122, 6132) are in contact with each other, 6122, 6132) and horizontal extensions (6113, 6123, 6133) are vertical. The horizontal extension portions 6113, 6123, 6133 overlap with the receiving portions 6111, 6121, 6131 in the axial direction.

The first, second and third vertical extensions 6112, 6122, 6132 are spaced apart at a predetermined interval on the same plane perpendicular to the axial direction, and the third horizontal extension 6133 is a first vertical extension ( The first horizontal extension 6113 and the second horizontal extension 6123 are spaced apart from the first horizontal extension 6113 towards the first vertical extension 6112 Extends straight by the length Through this, the first, second, and third horizontal extensions 6113, 6123, 6133 overlap at a predetermined interval in the axial direction under the first vertical extension 6112, and radiate along the circumferential direction therefrom. It is bent outward in the direction. The first, second, and third vertical extensions 6112, 6122, and 6132 have the shortest length in the circumferential direction, and the third horizontal extension 6133 is the longest.

The first, second and third vertical extension portions 6112, 6122, 6132 are formed to overlap in the axial direction with a predetermined height difference, and the first connection portions 6114 and 6115 are the first horizontal extension portions 6113 Extends in the radial direction at, and the second and third connection portions are formed in a stepped shape that rises in the front axial direction and in the radial direction, and ends of the first, second and third connection portions 6114a, 6115a, 6124a, 6125a, 6134a , 6135a) are located at the same height in the axial direction. The first, second and third connection parts 6114, 6115, 6124, 6125, 6134, 6135 are narrow in width, and the same axial direction as the first, second and third vertical extensions 6112, 6122, 6132. It may be formed in a plate shape having a thickness.

Ends 6114a, 6115a, 6124a, 6125a, 6134a, and 6135a of the first, second, and third connection portions may be formed in a bent shape that is convexly curved upward in the axial direction. The lead wire 3123 of the coil is inserted and coupled between the curved surfaces facing each other.

3A shows a structure in which a first insulating cover part 650 is wrapped around the combined hermetic terminal assembly 500 and the bus bar 610.

Referring to FIG. 3A, the lower side of the hermetic terminal assembly 500 and the bus bar 610 are wrapped and sealed by a first insulating cover part 650.

One end of the conductive member 510 is connected to the inverter unit 400, and the connection parts 6114, 6115, 6124, 6125, 6134, 6135 of the bus bar 610 connected to the conductive member 510 are drawn out from the motor. By combining with the lead wire 3123 of the coil, the inverter unit 400 and the motor unit 300 are connected so as to be energized.

That is, when both the conductive member 510 and the bus bar 610 are conductive conductor bars, insulation breakdown occurs when they are exposed to refrigerant or oil introduced from a suction port (not shown) located in front of the main housing 110. I can.

The first insulating cover part 650 is the rear side of the body member 520 and the main housing 110 to prevent exposure of the conductive member 510 and the bus bar 610 to gas or liquid refrigerant or oil. It is formed to enclose and seal the other end of the conductive member 510 and the bus bar 610 that protrudes to each other.

Through this, the first insulating cover part 650 wraps and seals the conductors exposed toward the main housing 110. That is, the other end of the conductive member 510 protruding toward the main housing 110, receiving portions 6111, 6121, 6131, vertical extensions 6112, 6122, 6132, horizontal extensions 6113, 6123, 6133 And a part of the connection parts 6114. 6115, 6124, 6125, 6134, and 6135 to be sealed.

By sealing all the conductors located in the main housing 110, it is possible to prevent the occurrence of insulation breakdown by the refrigerant or oil introduced from the front side of the main housing 110.

As a method of sealing, an injection molding method may be employed. Injection molding is a method in which plastic is heated and melted and then injected into a mold at high pressure to cool and solidify while maintaining the pressure.

That is, after placing the airtight terminal assembly 500 and the bus bar 610 coupled to each other in a mold having a predetermined shape, the melted insulating material is injected into the mold and cooled and solidified to form the first insulating cover part 650. Can be formed.

In addition, in an embodiment of the present invention, the body member 520 and the first insulating cover portion 650 may be integrally formed. After positioning the conductive member 510 connected to each other in the mold having a predetermined shape, the insulating member 521 surrounding it, and the bus bar 610 connected to the conductive member 510, the melted insulating material is injected into the mold and cooled. It can be solidified to form an insulating cover. That is, the body member 520 and the first insulating cover portion 650 may be integrally formed.

Through the above structure, one end of the conductive member 510 exposed to the inverter part 400 and a connection part 6114. 6115, 6124, 6125, which is coupled to the lead wire 3123 of the coil in a second insulating cover part to be described later. Except for the ends of the 6134 and 6135, the surfaces of the conductive member 510 and the bus bar 610 may be completely sealed.

However, when the first insulating cover part 650 is formed, the ends 6114a, 6115a, 6124a, 6125a, 6134a, 6135a of the connection part coupled with the lead wire 3123 of the coil drawn from the motor part 300 are exposed. One end of the conductive member 510 that is formed and protrudes to the inverter part 400 is also exposed in the inverter part 400.

The conductive member 510 exposed to the inverter unit 400 is shielded from gas or liquid refrigerant or oil through an external sealing structure using a rubber sealing member to be described later, and ends of the connection portions 6114a, 6115a, 6124a, 6125a, 6134a and 6135a) are sealed by a second insulating cover portion to be described later.

The first insulating cover part 650 seals along the outer circumferential surface of the body member 520 to seal the other side of the body member 520 and protrudes into the main housing 110 from the other side of the body member 520 The other end of the member 510, receiving parts (6111, 6121, 6131), vertical extensions (6112, 6122, 6132), horizontal extensions (6113, 6123, 6133), connection parts (6114, 6115, 6124, 6125) , 6134, 6135) are formed to seal them along a portion of.

The other side of the body member 520, the other end of the conductive member 510 protruding into the main housing 110 from the other side of the body member 520, receiving portions 6111, 6121, 6131, vertical extension ( 6112, 6122, 6132) and some of the horizontal extensions (6113, 6123, 6133) are sealed by the axial insulating portion 651, the rest of the horizontal extensions (6113, 6123, 6133) extending along the circumferential direction Is sealed by the circumferential insulating portion 652.

The first insulating cover part 650 wraps the connection parts 6114, 6115, 6124, 6125, 6134, 6135 in the part surrounding the connection parts 6114, 6115, 6124, 6125, 6134, 6135, and the circumferential insulation part ( It includes a stop portion 6251 and a terminal guide portion 6252 extending in the radial direction from the 652. The stopping part 6251 has a width wider than that of the connection parts 6114, 6115, 6124, 6125, 6134, 6135, and the terminal guide part 6252 extends from the stopping part 6251 and the connection parts 6114, 6115 , 6124, 6125, 6134, 6135, and a terminal guide portion 6252 having a width narrower than that of the stop portion.

The width of the terminal guide part 6252 is formed almost the same as the width of the receiving groove 3152 of the outer wall part 315 into which the connection parts 6114, 6115, 6124, 6125, 6134, 6135 are inserted, and the stop part ( The width of the 6521 is formed larger than the width of the receiving groove (3152). Through this, when the end portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a of the connection part and the terminal guide part 6252 surrounding it are engaged with the receiving groove 3152 and inserted for a predetermined length or more, the outer wall part 315 is pressed. Fix the connection part (6114, 6115, 6124, 6125, 6134, 6135).

The terminal guide part 6252 is a connection part 6114, 6115, 6124, 6125, 6134, 6135 and a part of the upper part of the axial direction of the connection part 6114a, 6115a, 6124a, 6125a, 6134a, 6135a. 6114, 6115, 6124, 6125, 6134, 6135). Since the width of the terminal guide portion 6252 is formed to be approximately the same as the width of the receiving groove 3152 of the outer wall portion 315, the end portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a of the connection portion are provided with the receiving groove 3152 ), and guide it so that it slides into place.

The terminal guide portion 6252 inserted into the receiving groove 3152 along with the end portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a of the connection portion is provided with the end portions of the connection portion 6114a, 6115a, 6124a, 6125a, 6134a, 6135a. Support and fix.

A coupling groove 654 may be formed on a surface of the first insulating cover part 650 that faces the rotation axis. The coupling groove 654 is formed below the inner surface and engaged with the inner wall portion extending from the inner end of the stator.

The coupling groove 654 may be formed in plural along a surface of the first insulating cover part 650 facing the rotation axis. The coupling groove 654 is coupled with an inner wall portion extending in the axial direction from the inner surface of the stator to support the hermetic terminal assembly 500 and the bus bar 610 in the axial direction.

Fig. 3b shows a cross section taken along line I-I of Fig. 3a.

Referring to FIG. 3B, a structure in which the conductive member 510, the bus bar 610, and the body member 520 in the main housing 110 are completely sealed is shown in detail.

One end of the conductive member 510 protrudes toward the inverter part 400 and the other end is sealed by a first insulating cover part 650 surrounding it.

In addition, the receiving portions 6111, 6121, 6131 of the bus bar 610 coupled to the other end of the conductive member 510, and vertical extension portions 6112, 6122, 6132 extending from the receiving portions 6111, 6121, 6131 ), the horizontal extension portions 6113, 6123, 6133 extending from the vertical extension portions 6112, 6122, 6132 are enclosed and sealed by the first insulating cover portion 650.

As described above, at least some of the plurality of bus bars 610 are arranged to overlap in the axial direction.

In order to reduce the volume of the first insulating cover part 650, the receiving parts 6111, 6121, 6131 and the horizontal extension parts 6113, 6123, 6133 are arranged to overlap in the axial direction, and the second vertical extension part 6122 ), the second horizontal extension 6123 and the third horizontal extension 6133 are disposed to overlap in the axial direction.

In addition, although not shown in FIG. 3B, the first, second, and third vertical extensions 6112, 6122, 6132 are formed to overlap in the axial direction below the first vertical extension 6112, and It overlaps and extends in the circumferential direction.

An annular second step portion 522 depressed inward for a predetermined length from the outer periphery of the body member 520 of the airtight terminal assembly 500 toward the inverter portion 400 may be formed, and the annular second step portion ( The annular second sealing members 901 and 902 may be inserted into the 522. In this regard, it will be described in detail later.

3C shows a cross section taken along the line II-II of FIG. 3A.

Referring to FIG. 3C, a structure in which the conductive member 510 and the receiving portions 6111, 6121, and 6131 of the bus bar 610 are completely sealed is shown in detail.

One end of the first, second, and third conductive members 510 protrudes toward the inverter unit 400 and the other end is sealed by a first insulating cover part 650 surrounding the first, second, and third conductive members 510.

In addition, the receiving portions 6111, 6121, 6131 of the bus bar 610 coupled to the other ends of the first, second and third conductive members 510 are wrapped and sealed by the first insulating cover portion 650. do.

That is, the first insulating cover part 650 wraps and seals the hermetic terminal assembly 500 and the plurality of bus bars 610. The first insulating cover part 650 is sealed along the outer circumferential surface of the body member 520 to seal the other side of the body member 520, and the first, second and second parts protruding from the other side of the body member 520 It is formed to surround the other end of the third conductive member 510 and the receiving portions 6111, 6121, 6131 of the bus bar 610 coupled to the other end.

Since the Ⅱ-Ⅱ line is a line connecting the first, second and third conductive members 510, the first, second and third receiving portions of the first, second and third bus bars 610 in FIG. 3C Only (6111, 6121, 6131) are shown.

An annular second step 522 recessed a predetermined depth may be formed along the outer periphery of the body member 520 of the airtight terminal assembly 500 toward the inverter part 400, and the annular second step 522 ), an annular second sealing member 901 may be inserted. In this regard, it will be described in detail later.

4A is a perspective view showing an exploded view of the hermetic terminal assembly 500 according to the present invention before the motor unit 300 is coupled.

Referring to FIG. 4A, the airtight terminal assembly 500, the bus bar 610, and the first insulating cover portion 650 coupled to each other shown in FIG. 3A are shown, and a motor unit 300 coupled thereto is shown. .

The motor unit 300 includes a stator 310, and an inner wall portion 313 is formed to extend in the axial direction to the inside with the end coil 3121 on the front side of the stator 310 interposed therebetween, and to the outside The outer wall portion 315 is formed.

The outer wall part 315 includes a first outer wall part 315 and a receiving groove 3152 in which a receiving groove 3152 into which the connection parts 6114, 6115, 6124, 6125, 6134, 6135 of the bus bar 610 are inserted is formed. ) Is divided into a second outer wall portion that is not formed.

On the front side of the first outer wall part 315, a receiving groove 3152 is formed to accommodate the end portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a of the connection part and the terminal guide part 6252 surrounding it and support it in the axial direction. do. In addition, the width of the receiving groove 3152 is formed almost the same as the width of the terminal guide portion 6252, supporting the terminal guide portion 6252 and the ends 6114a, 6115a, 6124a, 6125a, 6134a, 6135a of the connection portion. To fix it.

The length in the direction in which the connection portions 6114, 6115, 6124, 6125, 6134, 6135 of the terminal guide portion 6252 extend is formed such that all of the terminal guide portions 6252 can be accommodated in the receiving groove 3152. I can.

In addition, the coupling protrusion 3151 may be formed to extend in the axial direction on the front side of the first outer wall portion 315. The coupling protrusion 3151 is formed to engage with the sealing cover 316 to be described later.

A coupling groove 654 is formed on the rear side of the surface facing the rotation shaft of the first insulating cover part 650, and the coupling groove 654 meshes with the inner wall part 313 and is supported in the axial direction, and the end of the connection part ( 6114a, 6115a, 6124a, 6125a, 6134a, 6135a) and a terminal guide portion 6252 surrounding the same are engaged with the receiving groove 3152 and supported in the axial direction.

In addition, a connection groove 3101 formed at a predetermined interval in the axial direction along the outer circumferential surface of the stator 310 is formed on the rear side of the stator 310. A coil drawn from one end coil 3121 on the rear side of the stator 310 may be connected to the other end coil 3121 through a connection groove 3101.

In addition, although not shown, in the stator 310, a coil drawn from one end coil 3121 on the front side may be connected to the other end coil 3121 through the inside of the second outer wall portion 314. .

4B is a perspective view showing a state in which the hermetic terminal assembly 500 and the motor unit 300 are combined according to the present invention.

Referring to FIG. 4B, the end portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a of the connection portion of the bus bar 610 and the terminal guide portion 6252 are formed in the first outer wall portion 315. The coupling groove 654 and the inner wall portion 313 formed in the first insulating cover portion 650 are coupled to each other. Through this, the hermetic terminal assembly 500 and the bus bar 610 are supported and fixed to the motor unit 300.

The length in the direction in which the connection portions 6114, 6115, 6124, 6125, 6134, 6135 of the terminal guide portion 6252 extend is formed so as to be accommodated in the receiving groove 3152, After insertion, it is pressed by the stopping part 6251 and inserted until it is stopped.

The ends of the connection part (6114a, 6115a, 6124a, 6125a, 6134a, 6135a) are formed in a bent shape that is convexly curved toward the inverter part 400, and the ends of the connection part (6114a, 6115a, 6124a, 6125a, 6134a, 6135a) face each other. The three-phase coil drawn from the front end coil 3121 is coupled between the viewing surfaces.

The three-phase coil is enclosed by an insulating coating, and only the portions that are coupled to the ends of the connection portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a are coupled to each other so that they can be energized by removing the coating. In an embodiment of the present invention, the coil 3123 with the covering removed and the ends of the connection parts 6114a, 6115a, 6124a, 6125a, 6134a, 6135a are the ends of the connection parts 6114a, 6115a, 6124a, 6125a, 6134a, 6135a) The opposite side of the coil 3123 may be coupled by pressing the coil 3123, and the connection end portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a and the coils may be engaged and soldered to each other.

The connection portions 6114, 6115, 6124, 6125, 6134, and 6135 of the bus bar 610 may be coated with an insulating coating agent. When the connection parts 6114, 6115, 6124, 6125, 6134, and 6135 are coated with an insulating coating agent, the coating on the surface in contact with the conductor wire 3123 of the coil may be removed to connect them so that they can conduct electricity.

In addition, after coupling the lead wires of the coil and the ends of the connection portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a, a protective coating may be formed on the contact surface to prevent exposure to refrigerant or oil. In an embodiment of the present invention, the protective coating may be an epoxy coating.

Next, the second insulating cover parts 315 and 316 according to an embodiment of the present invention will be described.

5 is a perspective view illustrating a motor unit 300 to which a sealing cover 316 is coupled to the motor unit 300 of FIG. 4B.

Referring to FIG. 5, the ends of the connection portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a are wrapped and sealed by the second insulating cover portions 315 and 316.

The second insulating cover parts 315 and 316 protrude from the outer periphery of one side of the motor part 300 in the direction of the inverter part 400 and accommodate end portions 6114a, 6115a, 6124a, 6125a, 6134a, 6135a of the connection part. It includes an outer wall portion 315 in which the receiving groove 3152 is formed and a sealing cover 316 coupled to the outer wall portion 315.

Ends of the connection part (6114a, 6115a, 6124a, 6125a, 6134a, 6135a) and the terminal guide part 6252 are inserted into and received in the receiving groove 3152, and the sealing cover 316 is the end part 6114a of the connection part in the axial direction, 6115a, 6124a, 6125a, 6134a, 6135a) is provided, the outer wall portion 315 is formed with a coupling protrusion 3151 protruding in the axial direction, and the sealing cover 316 is recessed in the axial direction The combined concave portions are formed and are joined to each other.

Through this, the ends of the connection portion (6114a, 6115a, 6124a, 6125a, 6134a, 6135a) are enclosed and sealed by the first insulating cover portion 650, the sealing cover 316 and the outer wall portion 315.

The end portions 6114a, 6115a, 6124a, 6125a, 6134a, and 6135a of the connection portion are wrapped by the terminal guide portion 6252, and the front side is exposed. However, the terminal guide part 6252 is inserted into the receiving groove 3152 until it is stopped by the stopping part 6251, and is fully accommodated in the receiving groove 3152, and the ends of the connection parts 6114a, 6115a, 6124a, 6125a, All of the exposed portions of the 6134a and 6135a are accommodated in the receiving groove 3152. Here, the receiving groove 3152 is sealed by the sealing cover 316, and the sealing cover 316 is formed to protrude radially inward to cover at least a part of the front side surface of the stopping part 6251, thereby forming a connection part ( 6114, 6115, 6124, 6125, 6134, 6135) are completely sealed so that they are not exposed inside the main housing.

A protective coating for preventing the inflow of refrigerant or oil may be formed along the boundary line where the sealing cover 316, the outer wall portion 315, and the stopping portion 6251 contact. In an embodiment of the present invention, the protective coating may be an epoxy coating.

Next, a sealing structure between the main housing 110 and the inverter unit 400 according to an embodiment of the present invention will be described.

6 is an exploded view showing the disassembled plate 800-the main housing 110-the motor part 300 according to the present invention.

6, when the motor unit 300 shown in FIG. 5 is shown, and the airtight terminal assembly protrudes to the inverter unit 400 through the through hole 115 formed in the front side of the main housing 110 , It shows a structure that seals the refrigerant or oil from the main housing 110 to the inverter unit 400 so that it does not flow.

The plate 800 covers the through hole 115 formed in the front layer of the main housing 110 and accommodates the conductive member 510 and the hollow insulating member 521 of the hermetic terminal assembly. A plate hole 801 for accommodating the conductive member 510 and the hollow insulating member 521 is formed in the plate 800. The plate hole 801 may be a plurality of holes having a diameter substantially the same as the outer diameter of the hollow insulating member 521 so as to respectively accommodate the plurality of hollow insulating members 521. Alternatively, it may be one hole capable of accommodating all of the plurality of hollow insulating members 521.

The front side of the main housing 110 is formed with a first stepped portion 113 depressed to a predetermined depth along the inner circumferential surface of the through hole 115, and spaced a predetermined distance from the first stepped portion 113 to form a plurality of first bolt holes. 112 is formed.

A plurality of second bolt holes 802 are formed in the plate 800 at a position corresponding to the first bolt hole 112 by being spaced apart from the plate hole 801 by a predetermined distance.

The plurality of bolts 810 are screwed into the first bolt hole 112 through the second bolt hole 802, and the plate 800 is between the head of the bolt 810 and the front side of the main housing 110. It is pressed toward the main housing 110 by the bolt 810 head.

The front side of the main housing 110 is recessed to a predetermined depth along the outer circumference of the through hole 115 to form an annular first stepped portion 113, and a predetermined depth is recessed along the outer periphery of the front side of the body member 520 An annular second stepped portion 522 is formed.

An annular first sealing member 900 is positioned between the annular first stepped portion 113 and the annular second stepped portion 522 and the plate 800, and the outer peripheral side of the rear side of the annular first sealing member 900 is It is supported by the first stepped portion 113, the inner circumferential side of the rear side is supported by the second stepped portion 522, and the front side opposite to the rear side is supported by the plate 800.

The outer periphery of the first annular sealing portion is formed substantially the same as the outer periphery of the first stepped portion 113, and the inner periphery of the first annular sealing portion is formed substantially the same as the inner periphery of the second stepped portion 522.

In addition, the thickness of the first annular sealing portion is formed substantially equal to the depth at which the first stepped portion 113 and the second stepped portion 522 are recessed.

That is, when the plate 800 is coupled to the front side of the main housing and the annular first sealing member 900 is positioned between the plate 800 and the first and second step portions 113 and 522, the first step The outer circumference of the part 113 includes the outer circumference of the annular first sealing member 900, the inner circumference of the annular first sealing member 900 includes the inner circumference of the second stepped portion 522, and the annular first sealing member The inner periphery of 900 includes the inner periphery of the plate hole 801.

Through the above structure, gas or liquid refrigerant or oil in the main housing 110 is blocked from flowing into the inverter unit 400.

That is, by sealing the front side of the main housing 110, the conductive member 510 protruding toward the inverter unit 400 is blocked from refrigerant or oil in a gaseous or liquid state, and the connection portion 6114 of the bus bar 610 , 6115, 6124, 6125, 6134, 6135) is sealed in the second insulating cover portion (315, 316), so that the connection portion (6114, 6115, 6124, 6125, 6134, 6135) is a gas or liquid refrigerant or Blocked from oil.

Through the above structure, the airtight terminal assembly in the main housing 110 and the bus bar 610 connecting the airtight terminal assembly and the motor unit 300 are sealed by the first insulating cover part 650, and the end of the connection part ( 6114a, 6115a, 6124a, 6125a, 6134a, 6135a) and the coupling part of the lead wire 3123 of the coil drawn from the motor part 300 is sealed in the second insulating cover part 315, 316, so that the inside of the main housing 110 All of the located metal parts are sealed and blocked from refrigerant or oil.

In addition, the annular first sealing member 900 is inserted into the space formed by the rear side of the plate 800 and the first and second step portions 113 and 522 to seal the main housing 110. The refrigerant or oil in the housing 110 is blocked from flowing into the inverter unit 400.

That is, by sealing the metal part inside the main housing 110 and sealing the main housing 110, a high insulation resistance condition can be satisfied.

7 shows a shape in which the plate 800 shown in FIG. 6-the main housing 110-the motor part 300 are combined.

Referring to FIG. 7, the plate 800 is coupled to the main housing 110 by a plurality of bolts 810 spaced apart from the plate hole 801 by a predetermined distance, and a plurality of hollow insulation through the plate hole 801 The member 521 is accommodated, and a plurality of conductive members 510 protrude from the plurality of hollow insulating members 521.

In the conductive member 510 according to the present embodiment, both ends thereof are connected so as to be energized to the inverter unit 430 and the motor unit 300, respectively, so that power and control signals are transmitted from the inverter unit 400 to the motor unit 300. Deliver. Accordingly, the conductive member 510 is preferably formed of a material having high electrical conductivity. For example, the conductive member 512 is formed of copper (Cu), copper (copper) phosphor bronze, or the like, or iron (Fe), iron-nickel (Fe-Ni), tin ( Tin) can be plated.

The conductive member 510 is electrically connected to the printed circuit device in the inverter unit 400.

Hereinafter, the sealing structure on the front side of the main housing will be described in detail with reference to a cross-sectional view taken along the line III-III.

8A is a cross-sectional view showing a cross section taken along line III-III of FIG. 7.

Referring to FIG. 8A, a cross section of the plate 800, the annular first sealing member 900, the hermetic terminal assembly 500, and the first insulating cover part 650 taken along the direction in which the conductive member 510 is arranged is shown. do.

The hermetic terminal assembly 500 includes a plurality of conductive members 510, a hollow insulating member 521 surrounding the plurality of conductive members 510, and a body member 520 surrounding the hollow insulating member 521, One side of the plurality of conductive members 510 and the hollow insulating member 521 protrudes into the inverter unit 400 and the other side protrudes into the main housing. The other side of the plurality of conductive members 510 protruding into the main housing 110 is connected to the plurality of bus bars 610.

The plate 800 covers the through hole 115 formed on the front side of the main housing 110, and the rear side of the plate 800 based on the plate 800 refers to the inside of the main housing 110, The front side of the plate 800 means the outside of the main housing 110.

Then, one side of the annular plate 800 and the conductive member 510 protrudes to the outside of the main housing 110, and the body member 520, the other side of the annular plate 800, and the other side of the conductive member 510 The side protrudes into the interior of the main housing 110.

The first insulating cover part 650 wraps and seals the hermetic terminal assembly 500 protruding into the main housing 110 and a plurality of bus bars 610.

That is, the first insulating cover part 650 is sealed along the outer circumferential surface of the body member 520 to seal the other side of the body member 520, and a hollow insulating member protruding from the other side of the body member 520 ( 521, the conductive member 510, and the bus bar 610 connected to the conductive member 510 are wrapped and sealed.

As described above, in the embodiment of the present invention, by putting the hermetic terminal assembly 500 and a plurality of bus bars 610 connected thereto in a mold having a predetermined shape, and injecting the molten insulating material into the mold, the main housing The hermetic terminal assembly 500 protruding into the 110 and the plurality of bus bars 610 may be wrapped and sealed.

The plate 800 covering the through hole 115 is pressed by a bolt 810, and the plate 800 presses the front side of the main housing 110. The plate hole 801 accommodates the insulating member 521 protruding from the front side surface of the body member 520, and the front side surface of the body member 520 is pressed by the plate 800.

That is, the through hole 115 of the main housing 110 is covered by the plate 800, and the plate hole 801 is covered by the front side of the body member 520, so that the front side of the main housing 110 It is sealed.

A sealing member is disposed between the plate 800, the body member 520, and the main housing 110 in order to prevent leakage of refrigerant that may be caused by pressure caused by the refrigerant inside the main housing 110 and the compressor running vibration. I can.

An annular first stepped portion 113 recessed to a predetermined depth along the outer periphery of the through hole 115 is formed on the front side of the main housing 110, and a predetermined depth along the outer periphery of the front side of the body member 520 A recessed annular second step portion 522 is formed. Here, the first and second stepped portions 522 may have substantially the same depth.

An annular first sealing member 900 is disposed at the first and second stepped portions 113 and 522. The outer circumferential side of the rear side of the annular first sealing member 900 is supported by the first stepped portion 113, the inner circumferential side of the rear side is supported by the second stepped portion 522, and the annular first sealing member 900 The front side of) is supported by the plate 800.

In an embodiment according to the present invention, the axial thickness of the annular first sealing member 900 may be formed to be thicker than the depths of the first and second stepped portions 113 and 522.

Through the above structure, it is possible to prevent the refrigerant in the main housing 110 from leaking between the plate 800 and the main housing 110, between the plate 800 and the body member 520, and the main housing ( 110) It is possible to improve the sealing force by blocking the movement of fluid between the inside and the inside of the inverter unit 400.

Secondary sealing portions may be formed on surfaces where the first and second stepped portions 113 and 522 and the rear side of the annular first sealing member 900 contact each other.

Annular sealing grooves 114 and 523 are formed in the annular first and second stepped portions 113 and 522, respectively, and annular second sealing members 901 and 902 are inserted into each of the annular sealing grooves 114 and 523. Can be.

The annular second sealing member 902 inserted into the first stepped portion 113 blocks the refrigerant that pressurizes the rear side of the annular first sealing member 900 from flowing outward in the radial direction, and the second stepped portion ( The annular second sealing member 901 inserted into the annular first sealing member 522 blocks the refrigerant that pressurizes the rear side of the annular first sealing member 900 from flowing into the radial direction.

By adopting a double sealing structure, the sealing force inside the main housing 110 can be further improved. In this regard, it will be described in more detail later.

Fig. 8B is an enlarged view showing an enlarged portion C of Fig. 8A.

Referring to FIG. 8B, a double sealing structure formed between the plate 800, the body member 520 and the main housing 110 is shown in detail.

The annular first sealing member 900 is inserted into a space between the rear surface of the plate 800, the annular first step 113 and the annular second step 522.

Here, a secondary sealing portion may be formed on a surface where the first and second stepped portions 113 and 522 and the rear side surface of the annular first sealing member 900 contact each other. By adopting a double sealing structure, the sealing force inside the main housing 110 can be further improved.

The height of the inner side 114b of the opposite sides of the annular sealing groove 114 formed on the side where the rear side of the first step 113 and the annular first sealing member 900 contacts is lower than that of the outer side 114a, Among the opposite sides of the annular sealing groove 523 formed on the surface where the second stepped portion 522 and the rear side surface of the annular first sealing member 900 contact, the height of the outer surface 523b is lower than that of the inner surface 523a Can be.

Through this, when the refrigerant flows outward in the radial direction from the surface where the first step 113 and the rear side surface of the annular first sealing member 900 contact, the annular second sealing member 902 is pressed radially outward. And, when the refrigerant flows radially inward from the surface where the second stepped portion 522 and the rear side surface of the annular first sealing member 900 contact, the annular second sealing member 901 is pressed radially inward. , The sealing force of the annular second sealing members 901 and 902 may be improved.

In addition, a separation prevention wall 116 may be formed between the first stepped portion 113 and the bolt 810 inserted into the first bolt hole 112. When the annular first sealing member 900 directly contacts the outer circumferential surface of the bolt 810 without the separation preventing wall 116, the annular first sealing member 900 is fastened to the first bolt hole 112 as the bolt 810 is fastened to the first bolt hole 112. ) Meshes with the thread 811 of the bolt 810 and is drawn into the bolt hole 112. In addition, there may be a problem in that the annular first sealing member 900 is separated from the first bolt hole 112 due to the pressure of the refrigerant inside the main housing 110 and is deformed.

By forming the separation preventing wall 116 between the first stepped portion 113 and the first bolt hole 112, damage, deformation, and separation of the annular first sealing member 900 can be prevented.

9 is a cross-sectional view showing a cross section taken along IV-IV of FIG. 7.

Referring to FIG. 9, a plate 800 taken along a direction perpendicular to a direction in which the conductive member 510 is arranged, a first annular sealing member 900, an airtight terminal assembly 500, and a first insulating cover part 650 A cross section is shown.

The main housing 110 sealing structure between the plate 800, the annular first sealing member 900, and the body member 520 shown in FIG. 9 is the same as the structure described in FIGS. 8 and 9, and Replaces the descriptions in 8 and 9.

The hermetic terminal assembly 500 includes a plurality of conductive members 510, a hollow insulating member 521 surrounding the plurality of conductive members 510, and a body member 520 surrounding the hollow insulating member 521, One side of the plurality of conductive members 510 and the hollow insulating member 521 protrudes into the inverter unit 400, and the other side protrudes into the main housing 110. The other side of the plurality of conductive members 510 protruding into the main housing 110 is connected to the plurality of receiving portions 6111, 6121, 6131, and extends vertically in the axial direction from the plurality of receiving portions 6111, 6121, 6131 The portions 6112, 6122, 6132 extend, and horizontal extension portions 6113, 6123, 6133 extend in the circumferential direction from the vertical extension portions 6112, 6122, 6132.

The plate 800 covers the through hole 115 formed on the front side of the main frame, and the rear side of the plate 800 based on the plate 800 refers to the inside of the main housing 110, and the plate 800 The front side of) means the outside of the main housing 110.

Then, one side of the annular plate 800 and the conductive member 510 protrudes to the outside of the main housing 110, and the body member 520, the other side of the annular plate 800, and the other side of the conductive member 510 The side protrudes into the interior of the main housing 110.

The first insulating cover part 650 includes an airtight terminal assembly 500 protruding into the main housing 110, a plurality of receiving parts 6111, 6121, 6131, vertical extension parts 6112, 6122, 6132, and a horizontal extension part. (6113, 6123, 6133) is wrapped and sealed.

That is, the first insulating cover portion 650 is sealed along the outer circumferential surface of the body member 520 to seal the other side of the body member 520, and a hollow insulating member protruding from the other side of the body member 520 ( 521), the conductive member 510 and the receiving portions 6121, 6131 connected to the conductive member 510, vertical extensions 6112, 6122, 6132 and horizontal extensions 6113, 6123, 6133 Close it.

Through the above structure, the metal part inside the main housing 110 is sealed and the main housing 110 is sealed, thereby satisfying a high insulation resistance condition.

Although the above has been described with reference to a preferred embodiment of the present invention, those of ordinary skill in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the present invention described in the following claims. You will understand that you can.

110: main housing 112: first bolt hole
113: first step portion 114: sealing groove
114a: outer wall 114b: inner wall
115: through hole 116: separation prevention wall
310: stator 3101: connecting groove
313: inner wall portion 314: second outer wall portion
315: first outer wall portion 3151: coupling protrusion
3152: receiving groove 3123: lead wire, 3-phase coil
500: hermetic terminal assembly 510: conductive member
511: first conductive member 512: second conductive member
513: third conductive member 520: body member
521: hollow insulating member 522: second stepped portion
523: sealing groove 523a: inner wall
523b: outer wall 610: bus bar
611: first bus bar 6111: first accommodating part
6112: first vertical extension 6113: first horizontal extension
6114, 6115: first connection part 6114a, 6115a: end of first connection part
612: second bus bar 6121: second accommodation unit
6122: second vertical extension 6123: second horizontal extension
6124, 6125: second connection part 6124a, 6125a: end of second connection part
613: third bus bar 6131: third receiving portion
6132: 3rd vertical extension 6133: 3rd horizontal extension
6134, 6135: third connection part 6134a, 6135a: end of third connection part
650: first insulating cover part 654: coupling groove
651: axial insulation portion 652: radial insulation portion
6521: stop part 6522: terminal guide part
800: plate 801: plate hole
802: second bolt hole 810: bolt
811: bolt thread 900: first sealing member

Claims (17)

housing;
A compression unit provided in the housing;
A motor unit connected to the compression unit to drive the compression unit;
An inverter unit coupled to one side of the housing and connected to the motor unit to be energized;
An airtight terminal assembly in which one side is exposed into the inverter unit and the other side is exposed into the housing;
A plurality of bus bars having one end connected to the other side of the hermetic terminal assembly and the other end connected to the motor part;
Including; a first insulating cover part enclosing and sealing at least a portion of the hermetic terminal assembly and the plurality of bus bars inside the housing, and
Each of the plurality of bus bars has a connection part connected to a lead wire of a winding coil provided in the motor part,
The end of the connection part is exposed to the outside of the first insulating cover part, and is sealed by the first insulating cover part and the second insulating cover part,
The second insulating cover part,
An outer wall portion protruding from an outer periphery of one side of the motor portion toward the inverter portion and having a receiving groove for receiving an end portion of the connection portion; And
An electric compressor comprising a sealing cover coupled to the outer wall. The method of claim 1,
At least a portion of the plurality of busbars are arranged to overlap in the axial direction. The method of claim 2,
The plurality of bus bars,
A first bus bar having an axial extension portion and a radial extension portion;
A second bus bar having an axial extension portion and a radial extension portion; And
Including a third bus bar having an axial extension portion and a radial extension portion,
The length of the axial extension of the second bus bar is longer than the first bus bar and shorter than the third bus bar,
The length of the circumferential extension of the second bus bar is longer than the first bus bar and shorter than the third bus bar. The method of claim 1,
The hermetic terminal assembly,
A body member provided inside the housing and inserted into a through hole provided in the housing such that one side faces the inverter and the other side faces the inside of the housing;
A hollow insulating member penetrating the body member; And
And a conductive member enclosed by the hollow insulating member, one end protruding from one side of the body member and the other end protruding from the other side of the body member and connected to one end of the bus bar,
The first insulating cover part,
An electric compressor for sealing the other side of the body member by sealing along the outer circumferential surface of the body member. delete delete delete The method of claim 1,
A coupling protrusion protruding in an axial direction is formed on the outer wall portion, and a coupling concave portion recessed in the axial direction is formed in the sealing cover, and the electric compressor is coupled to each other. The method of claim 4,
A plate having a plate hole for accommodating the hollow insulating member and covering the through hole;
An annular first step recessed to a predetermined depth along an outer circumference of the through hole at one side of the housing;
An annular second step recessed by a predetermined depth along the outer periphery of one side of the body member; And
The outer circumferential side of one side is supported by the annular first step, the inner circumferential side of one side is supported by the annular second step, and the other side in the opposite direction of one side is supported by the plate. An electric compressor comprising a member. The method of claim 9,
Each annular sealing groove is formed in the annular first stepped portion and the annular second stepped portion,
An electric compressor in which an annular second sealing member is inserted into each of the annular sealing grooves. The method of claim 10,
The height of the inner surface of the annular sealing groove formed in the first annular step is lower than the outer surface,
The height of the outer surface of the annular sealing groove formed in the second annular step portion is lower than the inner surface of the electric compressor. The method of claim 11,
One side of the housing is formed with a first bolt hole spaced a predetermined distance from the annular first step,
The plate has a second bolt hole corresponding to the first bolt hole,
The plate is an electric compressor coupled to the housing by bolts accommodated in the first and second bolt holes. The method of claim 12,
An electric compressor in which a separation prevention wall is formed between the annular first stepped portion and the first bolt hole. housing;
A compression unit provided in the housing;
A motor unit connected to the compression unit to drive the compression unit;
An inverter unit coupled to one side of the housing and connected to the motor unit to be energized;
An outer wall portion protruding from an outer periphery of one side of the motor portion toward the inverter portion;
A sealing cover coupled to the outer wall;
A plurality of conductive members having one side protruding into the inverter unit and the other side protruding into the housing;
A plurality of hollow insulating members surrounding the plurality of conductive members;
A plurality of bus bars having one end connected to the other side of the conductive member and the other end connected to the motor part;
It is inserted into the through hole formed in the housing so that one side faces the inverter, and includes at least a portion of the plurality of conductive members, at least a portion of the plurality of hollow insulating members, and the plurality of bus bars within the housing. Including a first insulating cover to wrap and seal,
Each of the plurality of bus bars has a connection part connected to a lead wire of a winding coil provided in the motor part,
The outer wall portion is formed with a forming groove for receiving the end of the connection portion,
The end of the connection part is exposed to the outside of the first insulating cover part, and is sealed by the first insulating cover part, the sealing cover, and the outer wall part. delete delete The method of claim 14,
A plate having a plate hole for accommodating the hollow insulating member and covering the through hole;
An annular first step recessed to a predetermined depth along an outer circumference of the through hole at one side of the housing;
An annular second step portion recessed by a predetermined depth along an outer periphery of one side of the first insulating cover portion; And
The outer circumferential side of one side is supported by the annular first step, the inner circumferential side of one side is supported by the annular second step, and the other side in the opposite direction of one side is supported by the plate. An electric compressor comprising a member.

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