Electric compressor

Abstract

Provided is an electric compressor that can suppress increases in cost, weight, and size due to a connector for connecting a motor and an inverter. [Solution] The present invention relates to an electric compressor, comprising: a motor that generates power; a compression mechanism that is driven by the motor to compress a refrigerant; an inverter that controls the motor; terminal pins that electrically connect the motor and the inverter; a plate that supports the terminal pins; and a connector having an insulator that insulates between the terminal pins and the plate, wherein at least a portion of the insulator is formed to surround the terminal pins, thereby suppressing increases in cost, weight, and size due to the connector, and wherein the terminal pins include portions with different cross-sectional areas in a direction perpendicular to the extension direction.

Description

[Technical Field]

[0001] The present invention relates to an electric compressor, and more particularly to an electric compressor that is capable of compressing a refrigerant using the driving force of a motor controlled by an inverter. [Background technology]

[0002] In general, a compressor is a device that compresses a fluid such as a refrigerant gas, and is used in air conditioning systems for buildings, vehicle air conditioning systems, and the like. The compressors are classified into reciprocating compressors that compress refrigerant by the reciprocating motion of pistons and rotary compressors that compress refrigerant while rotating, depending on the compression method. The reciprocating compressors are classified into crank compressors that transmit power through multiple pistons using a crank and swash plate compressors that transmit power through a rotating shaft equipped with a swash plate, depending on the power transmission method. The rotary compressors can be classified into vane rotary compressors that use a rotating rotary shaft and vanes, and scroll compressors that use an orbiting scroll and a fixed scroll. Furthermore, the compressors can also be classified into mechanical compressors that use an engine and electric compressors that use a motor (hereinafter referred to as electric compressors) depending on the drive system. Here, an inverter is applied to the electric compressor to control the motor for adjusting the compression capacity.

[0003] FIG. 1 is a cross-sectional view showing a conventional electric compressor, FIG. 2 is a front view showing a connector and an inverter in the electric compressor of FIG. 1, and FIG. 3 is a cross-sectional view taken along line II in FIG. As shown in the accompanying Figures 1 to 3, a conventional electric compressor includes a motor 30 that generates power, a compression mechanism 20 that receives power from the motor 30 and compresses a refrigerant, an inverter 40 that controls the motor 30, and a connector 50 that electrically connects the motor 30 and the inverter 40. Here, the housing 10 that accommodates the motor 30 and the inverter 40 includes a partition wall 14a that separates a motor accommodating space S1 in which the motor 30 is accommodated and an inverter accommodating space S in which the inverter 40 is accommodated, and the connector 50 seals the motor accommodating space S1 and the inverter accommodating space S2 and penetrates the partition wall 14a to connect to a motor terminal 36 and an inverter terminal 46, thereby electrically connecting the motor 30 and the inverter 40. That is, the connector 50 includes a plate 51 that closes a through hole 14b of the partition wall 14a and a terminal pin 52 that penetrates the plate 51, and one end of the terminal pin 52 is connected to the motor terminal 36 and the other end of the terminal pin 52 is connected to the inverter terminal 46.

[0004] At this time, a first lamella spring (not shown) having an inner surface that contacts the outer surface of one end of the terminal pin 52 and an outer surface that contacts the inner surface of the motor terminal 36 is interposed between one end of the terminal pin 52 and the motor terminal 36 to prevent poor contact that occurs when the inner diameter of the motor terminal 36 is larger than the outer diameter of one end of the terminal pin 52. In addition, a second thin flat spring L2 is interposed between the other end of the terminal pin 52 and the inverter terminal 46 to prevent poor contact that occurs when the inner diameter of the inverter terminal 46 is larger than the outer diameter of the other end of the terminal pin 52. The second thin flat spring L2 has an inner surface that contacts the outer surface of the other end of the terminal pin 52 and an outer surface that contacts the inner surface of the inverter terminal 46.

[0005] On the other hand, since both the plate 51 and the terminal pin 52 are made of a conductive material, insulation is required between the plate 51 and the terminal pin 52. Taking this into consideration, the connector 50 further includes a glass insulator 53 that insulates between the plate 51 and the terminal pin 52. However, such a conventional electric compressor has a problem in that the connector 50 for connecting the motor 30 and the inverter 40 increases costs, weight, and size. Specifically, if the insulator 53 is made of a glass material, the specific gravity of the insulator 53 is high, making it difficult to process, and thus increasing weight and cost. Furthermore, if the terminal pin 52 is made of a material with high electrical conductivity, the thermal expansion of the terminal pin 52 is large, which can damage the glass insulator 53. To prevent this, the terminal pin 52 is made of a material with low electrical conductivity (e.g., SUS). Therefore, the outer diameter of the terminal pin 52 must be increased to satisfy a predetermined allowable current. However, this increase in the outer diameter of the terminal pin 52 increases the size and cost of the connector 50 in order to ensure an insulation distance. Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide an electric compressor that can suppress increases in cost, weight, and size due to connectors for connecting a motor and an inverter. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides an electric compressor including a motor that generates power, a compression mechanism that is driven by the motor to compress a refrigerant, an inverter that controls the motor, terminal pins that electrically connect the motor and the inverter, a plate that supports the terminal pins, and a connector that has an insulator that provides insulation between the terminal pins and the plate, wherein at least a portion of the insulator is formed to surround the terminal pins. The terminal pin may include portions having different cross-sectional areas in a direction perpendicular to the extension direction. The insulator may include a first end protruding toward the motor, a second end protruding toward the inverter, and a middle end extending from the first end to the second end and penetrating the plate, and the terminal pin may include a first terminal portion surrounding an outer peripheral surface of the first end, a second terminal portion surrounding an outer peripheral surface of the second end, and a connecting portion extending from the first terminal portion to the second terminal portion and accommodated in the middle end.

[0008] The connection portion may include a groove formed in a concave shape on an outer peripheral surface of the connection portion, and the insulator may include a protrusion inserted into the groove. The first end and the second end may each be formed in a cylindrical shape, and the first terminal portion and the second terminal portion may each be formed in an annular shape. The first terminal portion is inserted into a first lamella spring, the outer peripheral surface of the first terminal portion contacts the inner peripheral surface of the first lamella spring, the first lamella spring is inserted into a terminal of the motor, the outer peripheral surface of the first lamella spring contacts the terminal of the motor, and the terminal pin is electrically connected to the motor. The second terminal portion is inserted into a second lamella spring, the outer peripheral surface of the second terminal portion contacts the inner peripheral surface of the second lamella spring, and the second lamella spring is inserted into a terminal of the inverter, the outer peripheral surface of the second lamella spring contacts the terminal of the inverter, and the terminal pin is electrically connected to the inverter. The first end may include a first tip portion that protrudes further toward the motor than the first terminal portion, and the second end may include a second tip portion that protrudes further toward the inverter than the second terminal portion. The corners of the first tip and the second tip may be chamfered.

[0009] The middle end portion may be concentric with the first end portion and the second end portion, may be cylindrical in shape and have an outer diameter larger than that of the first end portion and the second end portion, and may have a first step portion formed between the first end portion and the middle end portion, and a second step portion formed between the second end portion and the middle end portion. A cross section perpendicular to the extension direction of the connection portion may include a pair of long sides parallel to each other and a pair of short sides parallel to each other, the length of the long sides being smaller than the outer diameter of the first terminal portion and the outer diameter of the second terminal portion, and the length of the short sides being smaller than the length of the long sides. The connection portion may include a pair of long sides each including the pair of long sides and a pair of short sides each including the pair of short sides, and the terminal pins may be provided in plurality, and the plurality of terminal pins may be arranged spaced apart from each other in one extension direction of the plate, with the long sides of the plurality of terminal pins facing each other.

[0010] The connection portion may include a central portion arranged concentrically with the first terminal portion and the second terminal portion, a first curved portion extending from the central portion to the first terminal portion, and a second curved portion extending from the central portion to the second terminal portion. The first terminal portion and the second terminal portion may be spaced apart from the plate by a distance of 3 mm to 20 mm, respectively. The insulator may further include a first flange portion extending radially outward from the middle end portion and covering a portion of the motor-facing surface of the plate, and a second flange portion extending radially outward from the middle end portion and covering a portion of the inverter-facing surface of the plate. The insulator may be made of a plastic material and the terminal pin may be made of a copper material. [Effects of the Invention]

[0011] The electric compressor according to the present invention includes a motor that generates power, a compression mechanism that is driven by the motor to compress a refrigerant, an inverter that controls the motor, terminal pins that electrically connect the motor and the inverter, a plate that supports the terminal pins, and a connector that has an insulator that insulates between the terminal pins and the plate, and at least a portion of the insulator is formed to surround the terminal pins, thereby making it possible to suppress increases in cost, weight, and size due to the connector. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a cross-sectional view showing a conventional electric compressor. [Figure 2] 2 is a front view showing a connector and an inverter in the electric compressor of FIG. 1. FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line II in FIG. 2. [Figure 4] FIG. 2 is a perspective view showing a connector in the electric compressor of the present invention. [Figure 5] FIG. 5 is a cross-sectional view taken along line II-II in FIG. [Figure 6] FIG. 5 is a cross-sectional view taken along line III-III in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an electric compressor according to the present invention will be described in detail with reference to the accompanying drawings. 4 is a perspective view showing a connector in the electric compressor of the present invention, FIG. 5 is a cross-sectional view taken along line II-II in FIG. 4, and FIG. 6 is a cross-sectional view taken along line III-III in FIG. On the other hand, for components not shown in FIGS. 4 to 6, reference will be made to FIG. 1 for convenience of explanation. As shown in the accompanying Figures 4 to 6 and Figure 1, the electric compressor of the present invention may include a housing 10, a compression mechanism 20 that compresses a refrigerant inside the housing 10, a motor 30 that provides power to the compression mechanism 20, an inverter 40 that controls the motor 30, and a connector 500 that electrically connects the motor 30 and the inverter 40.

[0014] The housing 10 may include a center housing 12 fastened to one side of the compression mechanism 20, a front housing 14 coupled to the center housing 12 and forming a motor accommodating space S1 in which the motor 30 is accommodated, an inverter housing 16 coupled to the front housing 14 on the opposite side of the center housing 12 with respect to the front housing 14 and forming an inverter accommodating space S2 in which the inverter 40 is accommodated, and a rear housing 18 coupled to the other side of the compression mechanism 20 and having a discharge chamber D that accommodates refrigerant discharged from the compression mechanism 20. Here, the front housing 14 includes a partition wall 14a that separates the motor accommodating space S1 from the inverter accommodating space S2, and the partition wall 14a includes a through hole 14b that penetrates the partition wall 14a, and the connector 500 may be attached to the through hole 14b. In addition, the front housing 14 further includes an annular wall 14c protruding from the outer periphery of the partition wall 14a toward the center housing 12, and the annular wall 14c may include an intake port (not shown) that penetrates the annular wall 14c to guide the refrigerant into the motor accommodating space S1.

[0015] The motor 30 may include a stator 32 supported by the annular wall 14c, and a rotor 34 located within the stator 32 and rotating by interaction with the stator 32. The stator 32 includes a plurality of laminated iron cores formed in a substantially annular shape, and a coil wound around the iron core, and the coil may be electrically connected to the connector 500 via a motor terminal 36 that is tied to the end of the coil. The rotor 34 may be formed in a substantially cylindrical shape, include a permanent magnet, and be provided such that the outer circumferential surface of the rotor 34 faces the inner circumferential surface of the stator 32 with a predetermined gap therebetween. Furthermore, a rotating shaft 60 that transmits the rotational force of the rotor 34 to the compression mechanism 20 may be press-fitted into the center of the rotor 34.

[0016] The compression mechanism 20 may include a fixed scroll 22 that is fixedly installed, and an orbiting scroll 24 that meshes with the fixed scroll 22 to form a compression chamber together with the fixed scroll 22 and moves in an orbital motion around the rotation shaft 60 . In this embodiment, the compression mechanism 20 is formed in a so-called scroll type, but is not limited to this, and may be formed in other types such as a reciprocating type or a vane rotary type. The inverter 40 includes a substrate 42 , various elements 44 and inverter terminals 46 provided on the substrate 42 , and can be electrically connected to the connector 500 via the inverter terminals 46 . The connector 500 may include a plate 510 that covers the through hole 14b of the partition wall 14a to seal the motor accommodating space S1 from the inverter accommodating space S2 and supports a plurality of terminal pins 520 described later, a plurality of terminal pins 520 that are each made of a conductive material and pass through the plate 510 to electrically connect to the motor terminals 36 and the inverter terminals 46, and an insulator 530 that provides insulation between the plurality of terminal pins 520 and the plate 510.

[0017] The plate 510 may be formed in a rectangular shape having a width (measured in a direction perpendicular to the height and length) that is longer than its height (measured in the extension direction of the terminal pins 520) and shorter than its length (measured in the arrangement direction of the multiple terminal pins 520). The plate 510 may also include a plurality of holes 512 that penetrate the plate 510 in a height direction, and the plurality of holes 512 may be arranged in a length direction of the plate 510 . Here, among the plurality of holes 512, two holes 512a located at both ends of the plate 510 in the longitudinal direction may have fixing members (not shown) inserted therein to fix the plate 510, and the remaining hole 512b among the plurality of holes 512 may have the plurality of terminal pins 520 and the insulator 530 inserted therein. The terminal pins 520 may be formed to have a large current flow per unit area, and the insulator 530 may be formed to absorb thermal expansion of the terminal pins 520 while ensuring insulation.

[0018] Specifically, the insulator 530 may include a first end 531 protruding toward the motor 30, a second end 532 protruding toward the inverter 40, and a middle end 533 extending from the first end 531 to the second end 532 and penetrating the plate 510. The first end 531 and the second end 532 are each formed in a cylindrical shape, and the middle end 533 is formed in a cylindrical shape that is concentric with the first end 531 and the second end 532 and has a larger outer diameter than the first end 531 and the second end 532, and a first step portion 534 may be formed between the first end 531 and the middle end 533, and a second step portion 535 may be formed between the second end 532 and the middle end 533. Here, the first end 531 includes a first tip 531a that protrudes further toward the motor 30 than a first terminal 521 described later, and the second end 532 includes a second tip 532a that protrudes further toward the inverter 40 than a second terminal 522 described later, and the corners of the first tip 531a and the second tip 532a may be chamfered.

[0019] In this embodiment, the corners of the first tip portion 531a and the corners of the second tip portion 532a are rounded and chamfered to form first rounded surfaces 531aa and second rounded surfaces 532aa, respectively, but are not limited thereto. However, in order to reduce the insertion force of a thin flat spring, which will be described later, it is preferable that the corners of the first tip portion 531a and the corners of the second tip portion 532a are rounded and chamfered as in this embodiment. In addition, in the present embodiment, the first step portion 534 and the second step portion 535 are beveled, but the present invention is not limited to this. Meanwhile, the insulator 530 may further include a first flange portion 536 extending radially outward from the middle end portion 533 and covering a portion of the motor-facing surface of the plate 510, and a second flange portion 537 extending radially outward from the middle end portion 533 and covering a portion of the inverter-facing surface of the plate 510. The plurality of terminal pins 520 may each include a first terminal portion 521 surrounding the outer peripheral surface of the first end portion 531, a second terminal portion 522 surrounding the outer peripheral surface of the second end portion 532, and a connection portion 523 extending from the first terminal portion 521 to the second terminal portion 522 and received in the middle end portion 533.

[0020] The first terminal portion 521 and the second terminal portion 522 may each be formed in a ring shape. In this case, the height of the first terminal portion 521 may be lower than the height of the first end portion 531, and as described above, the first end portion 531 may include the first tip portion 531a that protrudes further toward the motor 30 than the first terminal portion 521. In addition, the height of the second terminal portion 522 may be lower than the height of the second end portion 532, and as described above, the second end portion 532 may include the second tip portion 532a that protrudes further toward the inverter 40 than the second terminal portion 522. In addition, the first terminal portion 521 and the second terminal portion 522 may be formed to be spaced apart from each other in the height direction of the plate 510 in order to ensure an insulating distance between the plate 510 and each other. Here, in order to prevent dielectric breakdown and minimize an increase in size, the first terminal portion 521 and the second terminal portion 522 are preferably spaced apart from the plate 510 within a range of 3 mm to 20 mm, and more preferably 8.5 mm apart as in this embodiment.

[0021] The connection portion 523 may include a central portion 524 arranged concentrically with the first terminal portion 521 and the second terminal portion 522, a first curved portion 525 extending from the central portion 524 to the first terminal portion 521, and a second curved portion 526 extending from the central portion 524 to the second terminal portion 522. Here, by providing the first bending portion 525 and the second bending portion 526, the center portion 524 accommodated inside the middle end portion 533 of the insulator 530 can be connected to the first terminal portion 521 surrounding the outer circumferential surface of the first end portion 531 of the insulator 530, and the second terminal portion 522 surrounding the outer circumferential surface of the second end portion 532 of the insulator 530. The connecting portion 523 may be formed in a plate shape having a rectangular cross section in a direction perpendicular to the extension direction.

[0022] Here, the rectangular cross section may include a pair of long sides parallel to each other and a pair of short sides parallel to each other, the length of the long sides may be smaller than the outer diameter of the first terminal portion 521 and the outer diameter of the second terminal portion 522, and the length of the short sides may be smaller than the length of the long sides. In addition, the connection portion 523 includes a pair of long sides 523a each including the pair of long sides and a pair of short sides 523b each including the pair of short sides, and when the plurality of terminal pins 520 are arranged spaced apart from each other in the longitudinal direction of the plate 510, the long sides 523a of the plurality of terminal pins 520 may be arranged to face each other. In addition, the connection portion 523 may include a groove 523c formed in a concave shape on the outer peripheral surface of the connection portion 523, and the groove 523c may be formed in, for example, a square, a triangle, a semicircle, etc., and the insulator 530 may include a protrusion 533a inserted into the groove 523c. Here, the insulator 530 may be formed of a plastic material, the terminal pin 520 may be formed of a copper material, and the connector 500 may be formed by injecting the insulator 530 while the terminal pin 520 is inserted into the hole 512b of the plate 510.

[0023] The operation and effect of the electric compressor according to this embodiment will be described below. In the electric compressor of this embodiment, when power is applied to the motor 30, low-temperature, low-pressure refrigerant flows into the motor accommodating space S1 through the suction port (not shown), and the refrigerant in the motor accommodating space S1 flows into the compression mechanism 20, where it is compressed to high-temperature, high-pressure refrigerant, and then discharged to the outside of the housing 10 through the discharge chamber D. In this process, the motor 30 is controlled by the inverter 40 electrically connected via the connector 500, so that the cooling efficiency can be variably controlled. In the electric compressor according to this embodiment, the insulator 530 is made of a plastic material, thereby suppressing increases in cost, weight, and size due to the connector 500. Specifically, since the insulator 530 is made of a plastic material, it has a low specific gravity and is easy to process, thereby reducing weight and cost. Furthermore, since the terminal pin 520 is made of a highly electrically conductive material, even if the terminal pin 520 experiences large thermal expansion, the insulator 530 is not damaged because it is made of a plastic that can absorb the thermal expansion of the terminal pin 520. Therefore, the terminal pin 520 can be made of a highly electrically conductive copper material. As a result, it is not necessary to increase the outer diameter of the terminal pin 520 to satisfy a predetermined allowable current, making it easy to ensure an insulation distance and reducing the size and cost of the connector 500.

[0024] Furthermore, since the terminal pin 520 is made of copper, the first terminal portion 521 and the second terminal portion 522 are formed in a thin ring shape, and the connection portion 523 is formed in a thin plate shape, but the predetermined allowable current can be satisfied. Here, since the terminal pin 520 is formed thin overall, the cost and weight of the terminal pin 520 can be reduced. Furthermore, since the connection portion 523 is formed in a plate shape having the pair of long sides 523a and the pair of short sides 523b, and the long sides 523a of the terminal pins 520 are arranged to face each other, it may be easier to ensure an insulation distance between the connection portions 523 of the terminal pins 520. Furthermore, since the connection portion 523 includes the center portion 524 that is arranged concentrically with the first terminal portion 521 and the second terminal portion 522, it may be easier to ensure an insulation distance between the connection portions 523 of the terminal pins 520. Furthermore, since the connection portion 523 is accommodated inside the insulator 530 (more precisely, the middle end portion 533), it is possible to ensure insulation not only between the connection portions 523 of the terminal pins 520 but also between the terminal pins 520 and the plate 510. Furthermore, by ensuring insulation of the terminal pins 520 in this manner, it is possible to reduce the size of the connector 500.

[0025] Furthermore, since the first end 531 and the second end 532 are each formed in a cylindrical shape and the first terminal portion 521 and the second terminal portion 522 are each formed in a ring shape surrounding the first end 531 and the second end 532, a conventional thin flat spring can be used. That is, the first terminal portion 521 is inserted into a first thin flat spring (not shown) so that the outer circumferential surface of the first terminal portion 521 contacts the inner circumferential surface of the first thin flat spring (not shown), and the first thin flat spring (not shown) is inserted into the motor terminal 36 so that the outer circumferential surface of the first thin flat spring (not shown) contacts the motor terminal 36, thereby electrically connecting the terminal pin 520 to the motor 30. This prevents poor contact that occurs when the inner diameter of the motor terminal 36 is larger than the outer diameter of the first terminal portion 521. Furthermore, the second terminal portion 522 is inserted into the second thin flat spring L2, the outer peripheral surface of the second terminal portion 522 contacts the inner peripheral surface of the second thin flat spring L2, and the second thin flat spring L2 is inserted into the inverter terminal 46, the outer peripheral surface of the second thin flat spring L2 contacts the inverter terminal 46, thereby electrically connecting the terminal pin 520 to the inverter 40. This prevents poor contact that occurs when the inner diameter of the inverter terminal 46 is larger than the outer diameter of the second terminal portion 522.

[0026] Furthermore, since the first end portion 531 includes the first tip portion 531a, the first end portion 531 and the first terminal portion 521 can be easily inserted into the first flat spring (not shown). That is, burrs may exist at the corners of the first terminal portion 521, and such burrs may prevent the first end portion 531 and the first terminal portion 521 from being inserted into the first flat spring (not shown). However, since the first end portion 531 includes the first tip portion 531a that protrudes further than the first terminal portion 521 as in the present embodiment, the first tip portion 531a can guide the first end portion 531 and the first terminal portion 521 when they are inserted into the first flat spring (not shown). In addition, the chamfered corners of the first tip portion 531a allow the first end portion 531 and the first terminal portion 521 to be more easily inserted into the first flat spring (not shown). That is, the first rounded surface 531aa of the first tip portion 531a can guide the first end portion 531 and the first terminal portion 521 when they are inserted into the first flat spring (not shown).

[0027] In addition, since the first step portion 534 is formed between the first end portion 531 and the middle end portion 533, the first thin flat spring (not shown) is rested on the first step portion 534, and the first end portion 531 and the first terminal portion 521 can be prevented from being inserted further than a predetermined position into the first thin flat spring (not shown). Similarly, since the second end portion 532 includes the second tip portion 532a, the second end portion 532 and the second terminal portion 522 can be easily inserted into the second thin flat spring L2. In addition, the corners of the second tip portion 532a are chamfered, so that the second end portion 532 and the second terminal portion 522 can be more easily inserted into the second thin flat spring L2. Furthermore, since the second step portion 535 is formed between the second end portion 532 and the middle end portion 533, the second thin flat spring L2 rests on the second step portion 535, thereby preventing the second end portion 532 and the second terminal portion 522 from being inserted further than a predetermined position into the second thin flat spring L2.

[0028] Furthermore, since the connecting portion 523 includes the groove 523c and the insulator 530 includes the protrusion 533a inserted into the groove 523c, separation between the insulator 530 and the terminal pin 520 can be suppressed. Furthermore, since the insulator 530 includes the first flange portion 536, the insulator 530 can be prevented from being separated from the plate 510 toward the inverter 40 side. Furthermore, since the insulator 530 includes the second flange portion 537, it is possible to prevent the insulator 530 from being separated from the plate 510 toward the motor 30 side. Furthermore, the first flange portion 536 and the second flange portion 537 can prevent the motor accommodating space S1 and the inverter accommodating space S2 from communicating with each other through the gap between the insulator 530 and the plate 510. [Explanation of symbols]

[0029] 10. Housing 12 Center housing 14 Front housing 14a Bulkhead 14b Through hole 14c Circular Wall 16 Inverter housing 18 Rear housing 20 Compression mechanism 22 Fixed Scroll 24 Swivel Scroll 30 motor 32 Stator 34 rotor 36 Motor terminal 40 inverter 42 PCB 44 elements 46 Inverter terminal 60 Rotational Axis 500 Connectors 510 Plate 512 holes 512a hole 512b hole 520 terminal pin 521 1st terminal section 522 2nd terminal section 523 Connection 523a long side 523b short side 523c Groove 524 Center 525 1st song part 526 2nd song part 530 Insulator 531 First end 531a 1st tip 531aa 1st round surface 532 Second end 532a 2nd tip 532aa 2nd round surface 533 Middle end 534 First step 535 Second step D Discharge chamber S1 Motor housing space S2 Inverter housing space

Claims

1. a motor that generates power; a compression mechanism driven by the motor to compress the refrigerant; an inverter for controlling the motor; a connector having terminal pins that electrically connect the motor and the inverter, a plate that supports the terminal pins, and an insulator that insulates between the terminal pins and the plate, At least a portion of the insulator is formed to surround the terminal pin, the insulator includes a first end portion protruding toward the motor, a second end portion protruding toward the inverter, and a middle end portion extending from the first end portion to the second end portion and penetrating the plate; the terminal pin includes a first terminal portion surrounding an outer peripheral surface of the first end portion, a second terminal portion surrounding an outer peripheral surface of the second end portion, and a connecting portion extending from the first terminal portion to the second terminal portion and accommodated in the middle end portion; The connector is formed by injecting the insulator while the terminal pins are inserted into the holes in the plate.

2. 2. The electric compressor according to claim 1, wherein the terminal pin includes portions having different cross-sectional areas in a direction perpendicular to the extension direction.

3. the connecting portion includes a groove formed in a concave shape on an outer peripheral surface of the connecting portion, The electric compressor according to claim 1 , wherein the insulator includes a protrusion that is inserted into the groove.

4. The first end and the second end are each formed in a cylindrical shape, The electric compressor according to claim 1 , wherein the first terminal portion and the second terminal portion are each formed in an annular shape.

5. the first terminal portion is inserted into a first lamella spring, and an outer peripheral surface of the first terminal portion contacts an inner peripheral surface of the first lamella spring; the first lamella spring is inserted into a terminal of the motor, and an outer peripheral surface of the first lamella spring contacts the terminal of the motor, thereby electrically connecting the terminal pin to the motor; 5. The electric compressor according to claim 4, wherein the second terminal portion is inserted into a second thin flat spring, an outer peripheral surface of the second terminal portion contacts an inner peripheral surface of the second thin flat spring, the second thin flat spring is inserted into a terminal of the inverter, and an outer peripheral surface of the second thin flat spring contacts the terminal of the inverter, thereby electrically connecting the terminal pin to the inverter.

6. the first end portion includes a first tip portion that protrudes further toward the motor than the first terminal portion, The electric compressor according to claim 4 , wherein the second end portion includes a second tip portion that protrudes further toward the inverter than the second terminal portion.

7. The electric compressor according to claim 6, wherein corners of the first tip portion and the second tip portion are chamfered.

8. 5. The electric compressor according to claim 4, wherein the middle end portion is formed in a cylindrical shape that is concentric with the first end portion and the second end portion and has an outer diameter larger than that of the first end portion and the second end portion, a first step portion is formed between the first end portion and the middle end portion, and a second step portion is formed between the second end portion and the middle end portion.

9. a cross section perpendicular to an extension direction of the connection portion includes a pair of long sides parallel to each other and a pair of short sides parallel to each other, 2. The electric compressor according to claim 1, wherein the length of the long side is smaller than the outer diameter of the first terminal portion and the outer diameter of the second terminal portion, and the length of the short side is smaller than the length of the long side.

10. the connecting portion includes a pair of long side surfaces each including the pair of long sides, and a pair of short side surfaces each including the pair of short sides, The terminal pin is provided in plurality, 10. The electric compressor of claim 9, wherein the terminal pins are spaced apart from one another in an extension direction of the plate, and are arranged such that long sides of the terminal pins face one another.

11. 2. The electric compressor according to claim 1, wherein the connection portion includes a central portion that is concentric with the first terminal portion and the second terminal portion, a first curved portion that extends from the central portion to the first terminal portion, and a second curved portion that extends from the central portion to the second terminal portion.

12. The electric compressor according to claim 1 , wherein the first terminal portion and the second terminal portion are spaced apart from the plate by a distance ranging from 3 mm to 20 mm.

13. 2. The electric compressor according to claim 1, wherein the insulator further includes a first flange portion extending radially outward from the middle end portion and covering a portion of the motor-facing surface of the plate, and a second flange portion extending radially outward from the middle end portion and covering a portion of the inverter-facing surface of the plate.

14. 2. The electric compressor according to claim 1, wherein the insulator is made of a plastic material, and the terminal pin is made of a copper material.

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