Electric compressor

Abstract

The invention relates to an electric compressor. The electric compressor may include: a motor; a compression mechanism that is driven by the motor and compresses a refrigerant; an inverter configured to control the motor; and a plurality of pins electrically connecting the motor and the inverter to each other, in which: the inverter includes a printed circuit board on which a switching element is mounted, the printed circuit board including a plurality of pin holes into which the plurality of pins are inserted; the switching element is formed as a smart power module having a plurality of motor connection terminals electrically connected to the plurality of pin holes, respectively; the intelligent power module is arranged such that the plurality of motor connection terminals face the plurality of pin holes; and the plurality of pin holes and the plurality of motor connection terminals are electrically connected to each other through a motor connection pattern of the printed circuit board.

Description

Technical Field

[0001] The present disclosure relates to an electric compressor, and more particularly, to an electric compressor configured to compress refrigerant using a driving force of a motor controlled by an inverter. Background Art

[0002] Generally, a compressor is a device that compresses a fluid such as a refrigerant gas, and is applied to an air conditioning (A / C) system of a building, a vehicle, or the like.

[0003] Compressors are classified into reciprocating compressors and rotary compressors. Reciprocating compressors compress refrigerant according to the reciprocating motion of pistons, and rotary compressors compress refrigerant while rotating. According to the power transmission from the driving source, reciprocating compressors include crank compressors, inclined plate compressors, etc. The crank compressor uses a crank to transmit the driving force from the driving source to multiple pistons, and the inclined plate compressor transmits the driving force to the shaft with the inclined plate installed. The rotary compressor includes a vane rotary compressor using a rotating shaft and blades that rotate, and a scroll compressor using a movable scroll and a fixed scroll.

[0004] Additionally, compressors may be classified into mechanical compressors using an engine and electric compressors using a motor (hereinafter, referred to as electric compressors) according to a driving method, and an inverter configured to control the motor to adjust compression capacity is applied in the electric compressor.

[0005] In particular, a conventional electric compressor includes: a motor configured to generate electricity; a compression mechanism driven by the motor and configured to compress a refrigerant; an inverter configured to control the motor; and a plurality of pins configured to electrically connect the motor to the inverter.

[0006] Additionally, if Figure 1 As shown in the figure, Figure 1 is a cross-sectional view showing a printed circuit board 51 of a conventional electric compressor, the inverter includes a printed circuit board (PCB) 51 on which a switching element is mounted, the printed circuit board (PCB) 51 includes a plurality of pin holes (not shown), a plurality of pins 62 are inserted into the plurality of pin holes, and the switching element is formed as an insulated gate bipolar transistor (IGBT) 52, which has a plurality of motor connection terminals 52a respectively connected to the plurality of pin holes (not shown).

[0007] Here, since the connection distance between the multiple pin holes (not shown) and the motor connection terminal 52a of the IGBT 52 is very long, a bus bar 53 mounted on the PCB 51 is provided so that the multiple pin holes (not shown) and the motor connection terminal 52a are connected without dielectric breakdown.

[0008] However, in the conventional electric compressor, there is a big problem in that the switching element occupies a large space because the switching element is formed as a plurality of IGBTs 52 occupying a relatively large volume.

[0009] In addition, since the bus bar is used, there is a problem that the number of parts, weight, and cost increase. Summary of the invention

[0010] Technical issues

[0011] Therefore, an object of the present disclosure is to provide an electric compressor capable of reducing a space occupied by a switching element in a PCB.

[0012] In addition, another object of the present disclosure is to provide an electric compressor capable of limiting increases in the number of parts, weight, and cost.

[0013] Technical Solutions

[0014] One embodiment is an electric compressor, comprising: a motor configured to generate electricity; a compression mechanism driven by the motor and configured to compress a refrigerant; an inverter configured to control the motor; and a plurality of pins configured to electrically connect the motor to the inverter, and the inverter may include a printed circuit board (PCB) on which a switching element is mounted, the printed circuit board may include a plurality of pin holes, the plurality of pins being inserted into the plurality of pin holes, the switching element may be formed as an intelligent power module (IPM), the intelligent power module having a plurality of motor connection terminals, the plurality of motor connection terminals being respectively connected to the plurality of pin holes, and the IPM may be arranged so that the plurality of motor connection terminals are arranged toward the plurality of pin holes.

[0015] The IPM may be arranged such that the plurality of motor connection terminals are arranged in a direction parallel to an arrangement direction of the plurality of pin holes.

[0016] The IPM may be disposed such that the plurality of motor connection terminals are disposed in a direction forming an angle equal to or less than 15 degrees with a direction parallel to an arrangement direction of the plurality of pin holes.

[0017] The IPM may be disposed such that at least one of the plurality of motor connection terminals is disposed opposite to the pin holes in a direction perpendicular to an arrangement direction of the plurality of pin holes.

[0018] The IPM may be configured such that a maximum spacing distance between the plurality of motor connection terminals and the plurality of pin holes is equal to or less than 20 mm.

[0019] In a case where a voltage applied to the inverter is 800 V or more, the IPM may be configured such that a minimum spacing distance between the plurality of motor connection terminals and the plurality of pin holes is equal to or greater than 4 mm.

[0020] In a case where a voltage applied to the inverter is less than 800 V, the IPM may be configured such that a minimum spacing distance between the plurality of motor connection terminals and the plurality of pin holes is greater than 0 mm and less than 4 mm.

[0021] The PCB may further include a motor connection pattern electrically connecting the plurality of pin holes with the plurality of motor connection terminals.

[0022] The inverter may also include a processor mounted on the PCB, the IPM may also include a pulse width modulation (PWM) terminal electrically connected to the processor, the PCB may also include a pulse width modulation pattern electrically connecting the pulse width modulation terminal to the processor, and the processor, the pulse width modulation terminal, and the pulse width modulation pattern may be arranged on a side opposite to the motor connection pattern based on the IPM.

[0023] The inverter may further include a shunt resistor mounted on the PCB, the IPM may further include a sensing terminal electrically connected to the shunt resistor, the PCB may further include a sensing pattern electrically connecting the shunt resistor to the sensing terminal and the processor, and the sensing terminal may be arranged to be spaced apart from the multiple motor connection terminals on an axis of a setting direction of the multiple motor connection terminals, and the shunt resistor, the processor, and the sensing pattern may be arranged on a side opposite to the motor connection pattern based on the axis.

[0024] The IPM may further include a power terminal, the PCB may further include a high voltage input unit to which a high voltage is applied and a high voltage pattern configured to electrically connect the high voltage input unit to the power terminal, and on the axis, the power terminal may be arranged on a side opposite to the sensing terminal based on the plurality of motor connection terminals, and the high voltage input unit and the high voltage pattern may be arranged on a side opposite to the sensing pattern based on the power terminal.

[0025] The motor connection pattern, the pulse width modulation pattern, the sensing pattern, and the high voltage pattern may not cross each other.

[0026] The IPM may include a power terminal, the PCB may also include a high voltage input unit to which a high voltage is applied and a high voltage pattern configured to electrically connect the high voltage input unit to the power terminal, and the high voltage input unit may be arranged on one side of the multiple pin holes, the power terminal may be arranged on the side where the high voltage input unit is located based on the multiple motor connection terminals, and the high voltage pattern may be arranged on the side where the high voltage input unit and the power terminal are located based on the motor connection pattern.

[0027] Another embodiment is an electric compressor, comprising: a motor configured to generate electricity; a compression mechanism driven by the motor and configured to compress a refrigerant; an inverter configured to control the motor; and a plurality of pins configured to electrically connect the motor to the inverter, and the inverter may include a printed circuit board (PCB) on which a switching element is mounted, the switching element may be formed as an intelligent power module (IPM) having a plurality of motor connection terminals, and the PCB may include a plurality of pin holes and a motor connection pattern, the plurality of pins being inserted into the plurality of pin holes, the motor connection pattern electrically connecting the plurality of pin holes to the plurality of motor connection terminals.

[0028] Beneficial effects

[0029] According to the present disclosure, an electric compressor includes: a motor configured to generate electricity; a compression mechanism driven by the motor and configured to compress a refrigerant; an inverter configured to control the motor; and a plurality of pins configured to electrically connect the motor to the inverter, the inverter including a printed circuit board (PCB) on which a switching element is mounted, the printed circuit board including a plurality of pin holes, the plurality of pins being inserted into the plurality of pin holes, and the switching element being formed as an intelligent power module (IPM), the intelligent power module having a plurality of motor connection terminals, the plurality of motor connection terminals being respectively connected to the plurality of pin holes, thereby reducing the space occupied by the switching element in the PCB.

[0030] In addition, the IPM is configured so that the multiple motor connection terminals are arranged toward the multiple pin holes, and the multiple pin holes and the multiple motor connection terminals are electrically connected through the motor connection pattern of the PCB, thereby suppressing the increase in the number of parts, weight, and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a cross-sectional view illustrating a printed circuit board of a conventional electric compressor,

[0032] Figure 2 is a cross-sectional view illustrating an electric compressor according to an embodiment of the present disclosure,

[0033] Figure 3 It's a picture. Figure 2 Front view of the printed circuit board of the electric compressor,

[0034] Figure 4 yes Figure 3 A magnified view of part A.

[0035] Figure 5 is a front view illustrating a printed circuit board of an electric compressor according to another embodiment of the present disclosure,

[0036] Figure 6 is a front view illustrating a printed circuit board of an electric compressor according to still another embodiment of the present disclosure,

[0037] Figure 7 is a front view illustrating a printed circuit board of an electric compressor according to still another embodiment of the present disclosure,

[0038] Figure 8 yes Figure 7 Rear view of. DETAILED DESCRIPTION

[0039] Hereinafter, an electric compressor according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0040] Figure 2 is a cross-sectional view illustrating an electric compressor according to an embodiment of the present disclosure, Figure 3 It's a picture. Figure 2 A front view of a printed circuit board of an electric compressor, and Figure 4 yes Figure 3 Magnified view of part A.

[0041] Reference Figures 2 to 4 According to the present disclosure, the electric compressor includes: a housing 100, a compression mechanism 200 configured to compress the refrigerant in the housing 100; a motor 400 configured to supply power to the compression mechanism 200; an inverter 500 configured to control the motor 400; and a connector 600 configured to electrically connect the motor 400 to the inverter 500.

[0042] The housing 100 includes: a central housing 110, which is fastened to one side of the compression mechanism 200; a front housing 120, which is connected to the central housing 110 and forms a motor accommodating space for accommodating the motor 400 therein; an inverter housing 130, which is connected to the front housing 120 on the side opposite to the central housing 110 and forms an inverter accommodating space for accommodating the inverter 500 therein; and a rear housing 140, which is connected to the other side of the compression mechanism 200 and has a discharge chamber for accommodating the refrigerant discharged from the compression mechanism 200.

[0043] Here, the front case 120 includes a partition wall 122 partitioning the motor accommodating space and the inverter accommodating space, the partition wall 122 includes a through hole 122 a passing through the partition wall 122 , and the connector 600 may be mounted on the through hole 122 a .

[0044] Additionally, the front housing 120 further includes an annular wall 124 protruding from the outer periphery of the partition wall 122 toward the central housing 110 , and the annular wall 124 may include a suction port (not shown) passing through the annular wall 124 , through which the refrigerant is guided into the motor accommodation space.

[0045] The motor 400 includes a stator 410 supported by the annular wall 124 and a rotor 420 positioned inside the stator to rotate by interaction with the stator 410 .

[0046] The stator 410 includes a multi-layered core having a substantially annular shape and a coil wound on the core, and the coil may be electrically connected to the connector 600 through a motor terminal 412 coupled to an end of the coil.

[0047] The rotor 420 is substantially cylindrical in shape, includes a permanent magnet, and may be disposed such that the outer peripheral surface of the rotor 420 faces the inner peripheral surface of the stator 410 with a predetermined gap. Additionally, the rotating shaft 300 may be press-fitted into the center of the rotor 420, wherein the rotating shaft 300 transmits the rotational force of the rotor 420 to the compression mechanism 200.

[0048] The compression mechanism 200 may include a fixed scroll 210 that is fixedly installed, and a movable scroll 220 that is engaged with the fixed scroll 210 , the movable scroll 220 forming a compression chamber together with the fixed scroll 210 and orbiting through the rotation shaft 300 .

[0049] In the exemplary embodiment, the compression mechanism 200 is formed in a scroll type, but is not limited thereto, and the compression mechanism 200 may be formed in various types such as a reciprocating type, a vane rotary type, and the like.

[0050] The inverter 500 may include: a printed circuit board 510, on which various components such as switching elements are mounted; and a plurality of pin holes 512, into which a plurality of pins 620 are inserted, the plurality of pins 620 will be described below, and the printed circuit board 510 can be electrically connected to the connector 600 through the plurality of pin holes 512.

[0051] The connector 600 may include a board 610 and an insulator 630, wherein the board 610 covers the through hole 122a of the partition wall 122 and supports the plurality of pins 620, while sealing the motor accommodating space relative to the inverter accommodating space, wherein the plurality of pins 620 formed of a conductive material pass through the board 610 and are inserted into the motor terminal 412 and the pin hole 512 of the printed circuit board 510, thereby being electrically connected between the motor terminal 412 and the pin hole 512 of the printed circuit board 510, and the insulator 630 insulates the plurality of pins 620 from the board 610.

[0052] In this case, if Figure 3 and Figure 4 As shown, the switching element may be formed into an intelligent power module 520 in which a self-protection function or a driving circuit of a power device, such as a metal oxide semiconductor field effect transistor (MOSFET) or an IGBT, is added.

[0053] In addition, the intelligent power module 520 includes a plurality of motor connection terminals 522, which are respectively connected to the plurality of pin holes 512, and the intelligent power module 520 can be configured so that the plurality of motor connection terminals 522 are arranged toward the plurality of pin holes 512, and so that the arrangement direction of the plurality of motor connection terminals 522 arranged in a row along the longitudinal direction of the intelligent power module 520 is set to be parallel to the arrangement direction of the plurality of pin holes 512 arranged in a row along the longitudinal direction of the board 610.

[0054] In addition, the intelligent power module 520 may be configured such that a spacing distance between the plurality of motor connection terminals 522 and the plurality of pin holes 512 is equal to or greater than 4 mm and equal to or less than 20 mm.

[0055] In addition, the plurality of motor connection terminals 522 of the intelligent power module 520 can be connected to the motor connection pattern (see Figure 7 516a) in is electrically connected to the plurality of pin holes 512.

[0056] Hereinafter, the operational effects of the electric compressor according to the present disclosure will be described.

[0057] That is, in the electric compressor of the present disclosure, when power is applied to the motor 400, a low-temperature and low-pressure refrigerant is introduced into the motor accommodating space through the suction port (not shown), and the refrigerant in the motor accommodating space is introduced into the compression mechanism 200, compressed to have a high temperature and high pressure, and discharged to the outside of the shell 100 after passing through the discharge chamber.

[0058] During the above process, the motor 400 is controlled by the inverter 500, which is electrically connected through the connector 600, whereby the cooling efficiency may be variably controlled.

[0059] Here, in the electric compressor according to the present disclosure, since the switching element is formed as the intelligent power module 520, the space occupied by the switching element in the printed circuit board 510 can be reduced. By doing so, the degree of freedom in designing elements other than the switching element can be increased, and the size of the printed circuit board 510 can be reduced.

[0060] In addition, the intelligent power module 520 is arranged so that the multiple motor connection terminals 522 are arranged toward the multiple pin holes 512, so the connection distance between the multiple pin holes 512 and the multiple motor connection terminals 522 can be reduced. In particular, the intelligent power module 520 is arranged so that the arrangement direction of the multiple motor connection terminals 522 is parallel to the arrangement direction of the multiple pin holes 512, so the connection distance between the multiple pin holes 512 and the multiple motor connection terminals 522 can be further reduced, and the arrangement positions of the two can become similar to each other. Because of this, the wiring structure connecting the multiple pin holes 512 and the multiple motor connection terminals 522 to each other is simplified, and the possibility of dielectric breakdown is reduced, and additional components such as bus bars used to electrically connect the two components to each other and at the same time organize the wiring and prevent dielectric breakdown can be omitted. Therefore, the number of components, cost, and weight can be reduced.

[0061] In addition, since the intelligent power module 520 is configured such that the spacing distance between the plurality of motor connection terminals 522 and the plurality of pin holes 512 is equal to or greater than 4 mm and equal to or less than 20 mm, the connection distance between the plurality of motor connection terminals 522 and the plurality of pin holes 512 can be reduced within the range of preventing dielectric breakdown. That is, since the minimum spacing distance (the minimum value in the spacing distance) between the plurality of motor connection terminals 522 and the plurality of pin holes 512 is ensured to be 4 mm or greater, the dielectric breakdown between the plurality of motor connection terminals 522 and the plurality of pin holes 512 can be limited, and since the maximum spacing distance (the maximum value in the spacing distance) between the plurality of motor connection terminals 522 and the plurality of pin holes 512 is limited to 20 mm or less, the dielectric breakdown between the wiring connecting the plurality of motor connection terminals 522 and the plurality of pin holes 512 to each other and another component can be limited.

[0062] Here, the present embodiment assumes that the voltage applied to the inverter 500 is 800V or more, however, when the voltage applied to the inverter 500 is less than 800V, the IPM may be set so that the minimum spacing distance between the plurality of motor connection terminals 522 and the plurality of pin holes 512 is greater than 0mm and less than 4mm. In this case, the connection distance between the plurality of motor connection terminals 522 and the plurality of pin holes 512 may be further reduced within the range of preventing dielectric breakdown.

[0063] In addition, since the plurality of motor connection terminals 522 and the plurality of pin holes 512 are connected to each other through the motor connection pattern printed on the printed circuit board 510 (refer to Figure 7516a) connection in the figure, thereby further reducing the possibility of dielectric breakdown, the number of parts, cost, and weight.

[0064] At the same time, in this embodiment, the multiple motor connection terminals 522 and the multiple pin holes 512 are each formed into three, and the multiple pin holes 512 include a first pin hole 512a, a second pin hole 512b adjacent to the first pin hole 512a, and a third pin hole 512c formed on the side opposite to the first pin hole 512a based on the second pin hole 512b, and the multiple motor connection terminals 522 include a first motor connection terminal 522a connected to the first pin hole 512a, a second motor connection terminal 522b adjacent to the first motor connection terminal 522a and connected to the second pin hole 512b, and a third motor connection terminal 522c formed on the side opposite to the first motor connection terminal 522a based on the second motor connection terminal 522b and connected to the third pin hole 512c. In addition, the spacing distance between the first motor connection terminal 522a and the second motor connection terminal 522b is smaller than the spacing distance between the first pin hole 512a and the second pin hole 512b, and the spacing distance between the second motor connection terminal 522b and the third motor connection terminal 522c is smaller than the spacing distance between the second pin hole 512b and the third pin hole 512c, and therefore, all the first to third motor connection terminals 522c cannot be arranged to be opposite to all the first to third pin holes 512c in a direction perpendicular to the arrangement direction of the plurality of pin holes 512. Therefore, the connection distance between the first motor connection terminal 522a and the first pin hole 512a, the connection distance between the second motor connection terminal 522b and the second pin hole 512b, and the connection distance between the third connection terminal 522c and the third pin hole 512c cannot be the same and cannot be the smallest at the same time. However, since the second motor connection terminal 522b is disposed opposite to the second pin hole 512b in a direction perpendicular to the arrangement direction of the plurality of pin holes 512, the connection distance between the plurality of motor connection terminals 522 and the plurality of pin holes 512 can be optimized within a given condition. That is, the spacing distance between the second motor connection terminal 522b and the second pin hole 512b becomes the minimum distance, and each of the spacing distance between the first motor connection terminal 522a and the first pin hole 512a and the spacing distance between the third connection terminal 522c and the third pin hole 512c increases to be slightly larger than the spacing distance between the second motor connection terminal 522b and the second pin hole 512b, however, the spacing distance between the first motor connection terminal 522a and the first pin hole 512a and the spacing distance between the third connection terminal 522c and the third pin hole 512c can become equal to each other.Therefore, compared with the spacing distance between the second motor connection terminal 522b and the second pin hole 512b, the increase in the spacing distance between the first motor connection terminal 522a and the first pin hole 512a and the increase in the spacing distance between the third connection terminal 522c and the third pin hole 512c can be minimized.

[0065] Meanwhile, in the present embodiment, the plurality of motor connection terminals 522 and the plurality of pin holes 512 are arranged in the width direction ( Figure 3 In the left and right directions), but not limited to this.

[0066] That is to say, Figure 5 As shown, the plurality of pin holes 512 may be arranged in the longitudinal direction ( Figure 5 ), and the plurality of motor connection terminals 522 are arranged in a direction parallel to the arrangement direction of the plurality of pin holes 512. In this case, since the plurality of motor connection terminals 522 and the plurality of pin holes 512 are arranged parallel to and opposite to each other, the above-described operational effect can be obtained.

[0067] Alternatively, for example, in the case where the plurality of motor connection terminals 522 cannot be arranged in a direction parallel to the arrangement direction of the plurality of pin holes 512 due to another component, the motor connection terminals 522 may be arranged in a direction parallel to the arrangement direction of the plurality of pin holes 512. Figure 6 The intelligent power module 520 is tilted as shown in the figure. However, the tilting angle needs to be limited so that the above-described operation effect can also be achieved in this case. That is, the intelligent power module 520 needs to be arranged so that the plurality of motor connection terminals 522 are arranged in a direction parallel to the arrangement direction of the plurality of pin holes 512 to form an angle greater than 0 degrees and equal to or less than 15 degrees, so that even when the intelligent power module 520 is tilted, a specific motor connection terminal ( Figure 6 In the case of 522a), the connection distance between the motor connection terminals 522 and the pin holes corresponding to the specific motor connection terminals does not increase excessively, and the plurality of motor connection terminals 522 face the plurality of pin holes 512. In this case, the angle is measured as the acute angle between the axis parallel to the arrangement direction of the plurality of pin holes 512 and the axis of the arrangement direction of the plurality of motor connection terminals 522 rotated in the clockwise direction or the counterclockwise direction.

[0068] Meanwhile, similar to the present embodiment, since the plurality of motor connection terminals 522 of the intelligent power module 520 are disposed toward the plurality of pin holes 512 of the printed circuit board 510 , it is possible to prevent the signal flow from being interrupted by noise.

[0069] In more detail, inductance, which is a parasitic component that generates noise, exists in the pattern (conducting wire) in which the signal flows. In addition, when there are multiple patterns, crosstalk will be generated, and the signal and noise will be dispersed between the multiple patterns due to the crosstalk. The inductance and crosstalk interrupt the signal flow through the pattern, and the longer the length of the pattern, the more the amount of crosstalk in the pattern increases, and the crosstalk will increase due to the overlap with another pattern, so that the signal may not flow smoothly.

[0070] However, as in the present disclosure, since the intelligent power module 520 is arranged so that the plurality of motor connection terminals 522 are arranged toward the plurality of pin holes 512 of the printed circuit board 510, the length of the motor connection pattern 516a can be reduced. Therefore, the inductance in the motor connection pattern 516a is reduced, and thus the noise generation in the motor connection pattern 516a can be reduced.

[0071] In addition, since the length of the motor connection pattern 516 a is reduced, the possibility of the motor connection pattern 516 a overlapping with another pattern is reduced, and thus, the crosstalk between the motor connection pattern 516 a and another pattern can be reduced.

[0072] For more details, see Figure 7 and Figure 8 , the printed circuit board 510 may include various patterns other than the motor connection pattern 516a.

[0073] That is, the inverter 500 may also include a processor 530 mounted on the printed circuit board 510, the intelligent power module 520 may also include a pulse width modulation (PWM) terminal 524 electrically connected to the processor 530, and the printed circuit board 510 may also include a pulse width modulation pattern 516b electrically connecting the pulse width modulation terminal 524 to the processor 530.

[0074] In addition, the inverter 500 may also include a shunt resistor 540 mounted on the printed circuit board 510, the intelligent power module 520 may also include a sensing terminal 526 electrically connected to the shunt resistor 540, and the printed circuit board 510 may also include a sensing pattern 516c electrically connecting the shunt resistor 540 to the sensing terminal 426 and the processor 530.

[0075] In addition, the intelligent power module 520 may further include a power terminal 528 , and the printed circuit board 510 may further include a high voltage input unit 514 to which a high voltage is applied and a high voltage pattern 516 d electrically connecting the high voltage input unit 514 to the power terminal 528 .

[0076] Here, since the plurality of motor connection terminals 522 of the intelligent power module 520 are disposed toward the plurality of pin holes 512 of the printed circuit board, the length of the motor connection pattern 516a is reduced, and thus the possibility of the motor connection pattern 516a overlapping with the pulse width modulation pattern 516b, the sensing pattern 516c, and the high voltage pattern 516d can be reduced. Because of this, the crosstalk between at least one of the pulse width modulation pattern 516b, the sensing pattern 516c, and the high voltage pattern 516d and the motor connection pattern 516a can be reduced.

[0077] In addition, since the plurality of motor connection terminals 522 of the intelligent power module 520 are arranged to face the plurality of pin holes 512 of the printed circuit board 510, the processor 530, the pulse width modulation terminal 524, and the pulse width modulation pattern 516b can be arranged on the side opposite to the motor connection pattern 516a based on the intelligent power module 520. Because of this, the possibility of the motor connection pattern 516a overlapping with the pulse width modulation pattern 516b is further reduced, and therefore, the crosstalk between the motor connection pattern 516a and the pulse width modulation pattern 516b can be further reduced. In addition, the length of the pulse width modulation pattern 516b can be reduced. Therefore, the possibility of the pulse width modulation pattern 516b overlapping with another pattern (e.g., the sensing pattern 516c, the high voltage pattern 516d) and the motor connection pattern 516a and the crosstalk caused by such overlap can be reduced. In addition, the inductance in the pulse width modulation pattern 516b and the noise generated by the inductance can be reduced.

[0078] In addition, since the plurality of motor connection terminals 522 of the intelligent power module 520 are arranged toward the plurality of pin holes 512 of the printed circuit board 510, the sensing terminal 526 is spaced apart from the plurality of motor connection terminals 522 on the axis of the arrangement direction of the plurality of motor connection terminals 522, and the shunt resistor 540, the processor 530, and the sensing pattern 516c can be arranged on the side opposite to the motor connection pattern 516a based on the axis of the arrangement direction of the plurality of motor connection terminals 522. Because of this, the possibility of the motor connection pattern 516a overlapping with the sensing pattern 516c is further reduced, and the crosstalk between the motor connection pattern 516a and the sensing pattern 516c can be further reduced. In addition, the length of the sensing pattern 516c can be reduced. Therefore, the possibility of the sensing pattern 516c overlapping with another pattern (e.g., the pulse width modulation pattern 516b, the high voltage pattern 516d) and the motor connection pattern 516a and the crosstalk caused by such overlap can be reduced. Furthermore, the inductance in the sensing pattern 516 c is reduced, and thus, noise generated due to the inductance may be reduced.

[0079] In addition, since the plurality of motor connection terminals 522 of the intelligent power module 520 are arranged toward the plurality of pin holes 512 of the printed circuit board 510, the high voltage input unit 514 can be arranged on one side of the plurality of pin holes 512, the power terminal 528 can be arranged on the high voltage input unit 514 side based on the plurality of motor connection terminals 522, and the high voltage pattern 516d can be arranged on the high voltage input unit 514 and the power terminal 528 side based on the motor connection pattern 516a. Here, the power terminal 528 can be arranged on the side opposite to the sensing terminal 526 on the axis of the arrangement direction of the plurality of motor connection terminals 522 based on the plurality of motor connection terminals 522, and the high voltage input unit 514 and the high voltage pattern 516d can be arranged on the side opposite to the sensing pattern 516c based on the power terminal 528. Because of this, the possibility of the motor connection pattern 516a overlapping the high voltage pattern 516d is further reduced, and the crosstalk between the motor connection pattern 516a and the high voltage pattern 516d can be further reduced. In addition, the length of the high voltage pattern 516d can be reduced. Therefore, the possibility of the high voltage pattern 516d overlapping with another pattern (e.g., the pulse width modulation pattern 516b, the sensing pattern 516c) and the motor connection pattern 516a and the crosstalk caused by the overlap can be reduced. In particular, since the high voltage pattern 516d and the sensing pattern 516c are arranged on opposite sides of each other, the crosstalk between the high voltage pattern 516d and the sensing pattern 516c can be significantly reduced. Additionally, the inductance in the high voltage pattern 516d and the noise generated by the inductance can be reduced.

Claims

1. An electric compressor comprising: a motor configured to generate electricity; a compression mechanism driven by the motor and configured to compress a refrigerant; an inverter configured to control the motor; as well as a plurality of pins configured to electrically connect the motor and the inverter, The inverter includes a printed circuit board (PCB), on which a switching element is mounted. Wherein, the printed circuit board comprises a plurality of pin holes, and the plurality of pins are inserted into the plurality of pin holes. wherein the switching element is formed as an intelligent power module (IPM), the intelligent power module having a plurality of motor connection terminals, the plurality of motor connection terminals being respectively connected to the plurality of pin holes, and Wherein, the intelligent power module is arranged so that the plurality of motor connection terminals are arranged toward the plurality of pin holes.

2. The electric compressor according to claim 1, in, The intelligent power module is arranged such that the plurality of motor connection terminals are arranged along a direction parallel to an arrangement direction of the plurality of pin holes.

3. The electric compressor according to claim 1, in, The intelligent power module is arranged such that the plurality of motor connection terminals are arranged in a direction forming an angle equal to or smaller than 15 degrees with a direction parallel to an arrangement direction of the plurality of pin holes.

4. The electric compressor according to claim 1, in, The intelligent power module is arranged such that at least one of the plurality of motor connection terminals is arranged to be opposite to the pin holes in a direction perpendicular to an arrangement direction of the plurality of pin holes.

5. The electric compressor according to claim 1, in, The intelligent power module is configured such that a maximum spacing distance between the plurality of motor connection terminals and the plurality of pin holes is equal to or less than 20 mm.

6. The electric compressor according to claim 5, in, When a voltage applied to the inverter is 800 V or more, the intelligent power module is configured such that a minimum spacing distance between the plurality of motor connection terminals and the plurality of pin holes is equal to or greater than 4 mm.

7. The electric compressor according to claim 5, in, When the voltage applied to the inverter is less than 800V, the intelligent power module is configured such that a minimum spacing distance between the plurality of motor connection terminals and the plurality of pin holes is greater than 0 mm and less than 4 mm.

8. The electric compressor according to claim 1, in, The printed circuit board further includes a motor connection pattern electrically connecting the plurality of pin holes and the plurality of motor connection terminals.

9. The electric compressor according to claim 8, in, The inverter further includes a processor mounted on the printed circuit board, The intelligent power module further comprises a pulse width modulation (PWM) terminal electrically connected to the processor. Wherein, the printed circuit board further comprises a pulse width modulation pattern electrically connecting the pulse width modulation terminal and the processor, and The processor, the pulse width modulation terminal, and the pulse width modulation pattern are arranged on a side opposite to the motor connection pattern based on the intelligent power module.

10. The electric compressor according to claim 9, in, The inverter further includes a shunt resistor mounted on the printed circuit board, The intelligent power module further comprises a sensing terminal electrically connected to the shunt resistor. The printed circuit board further comprises a sensing pattern, wherein the sensing pattern electrically connects the shunt resistor to the sensing terminal and the processor, and Wherein, the sensing terminal is arranged to be spaced apart from the multiple motor connection terminals on an axis of the setting direction of the multiple motor connection terminals, and the shunt resistor, the processor, and the sensing pattern are arranged on the side opposite to the motor connection pattern based on the axis.

11. The electric compressor according to claim 10, in, The intelligent power module also includes a power terminal, wherein the printed circuit board further comprises a high voltage input unit to which a high voltage is applied and a high voltage pattern configured to electrically connect the high voltage input unit to the power terminal, and Wherein, on the axis, the power terminal is arranged on a side opposite to the sensing terminal based on the plurality of motor connection terminals, and the high voltage input unit and the high voltage pattern are arranged on a side opposite to the sensing pattern based on the power terminal.

12. The electric compressor according to claim 11, in, The motor connection pattern, the pulse width modulation pattern, the sensing pattern, and the high voltage pattern do not cross each other.

13. The electric compressor according to claim 1, in, The intelligent power module includes a power terminal, wherein the printed circuit board further comprises a high voltage input unit to which a high voltage is applied and a high voltage pattern configured to electrically connect the high voltage input unit to the power terminal, and Among them, the high voltage input unit is arranged on one side of the multiple pin holes, the power terminal is arranged on the side where the high voltage input unit is located based on the multiple motor connection terminals, and the high voltage pattern is arranged on the side where the high voltage input unit and the power terminal are located based on the motor connection pattern.

14. An electric compressor comprising: a motor configured to generate electricity; a compression mechanism driven by the motor and configured to compress a refrigerant; an inverter configured to control the motor; as well as a plurality of pins configured to electrically connect the motor and the inverter, The inverter includes a printed circuit board (PCB), on which a switching element is mounted. wherein the switching element is formed as an intelligent power module (IPM) having a plurality of motor connection terminals, and The printed circuit board includes a plurality of pin holes and a motor connection pattern, the plurality of pins are inserted into the plurality of pin holes, and the motor connection pattern electrically connects the plurality of pin holes with the plurality of motor connection terminals.

Images