KR20210081128A - Inverter and motor operated compressor with this - Google Patents

Abstract

According to the present invention, an inverter and an electric compressor with the same comprise: a printed circuit board; an inverter component coupled to the printed circuit board; and a support member installed between the printed circuit board and the inverter component to support the inverter component. The support member forms a component support hole through which one end of the inverter component facing the printed circuit board is inserted and an inner circumferential surface of the component support hole may be formed to face an outer circumferential surface of the inverter component. Through this, while the inverter component is mounted vertically on the printed circuit board, shaking or damage due to vibration can be suppressed.

Description

Inverter and electric compressor having the same

The present invention relates to an inverter having an electric part support device and an electric compressor having the same.

A compressor that compresses a refrigerant in an air conditioning system for a vehicle has been developed in various forms. In recent years, the development of electric compressors driven by electricity using a motor has been actively carried out in accordance with the trend toward electricization of automobile parts.

A scroll compression method suitable for high compression ratio operation is mainly applied to electric compressors. In such a scroll-type electric compressor (hereinafter, referred to as an “electric compressor”), a motor unit and a compression unit are mounted together inside a housing, and an inverter unit is mounted outside the housing. The inverter unit and the motor unit are electrically connected using a hermetic terminal.

In the inverter unit, various components constituting the inverter are disposed in a space provided between the housing and the cover. For example, it includes a printed circuit board (PCB) coupled to the inverter housing, an electronic device mounted on the printed circuit board, and electrical components supported by the inverter housing and connected to the printed circuit board.

Some of these electronic devices or electrical components are mounted or connected to a printed circuit board with a separate socket, while some are directly connected to the printed circuit board. In particular, when an electric compressor is mounted on a vehicle, since the inverter may be vulnerable to vibration, large parts may be connected to the printed circuit board using a busbar. Patent Document 1 (Korean Patent Application Laid-Open No. 10-2012-0136162) discloses an example of connecting a capacitor to a printed circuit board by inserting a capacitor into a bus bar, which is a capacitor support.

As described above, when the component is inserted into a separate bus bar and connected to the printed circuit board, the vibration of the corresponding component can be suppressed and reliability can be improved. However, there is a problem in that the area occupied by the printed circuit board is enlarged as the bus bar is formed in a structure for accommodating the corresponding part. In particular, when the capacitor is laid down horizontally as in Patent Document 1, the length of the bus bar becomes longer and the occupied area in the narrow printed circuit board is further increased, and thereby the space utilization of the printed circuit board is lowered, and the design freedom may be violated. In addition, it may cause the printed circuit board to expand and eventually become a factor that makes it difficult to reduce the size of the compressor.

Korean Patent Publication No. 10-2012-0136162 (published on: 2012.02.18.)

SUMMARY OF THE INVENTION An object of the present invention is to provide an inverter capable of suppressing vibration or damage to inverter parts by vibration and an electric compressor having the same.

Furthermore, the present invention also has an object to provide an inverter capable of adding a support member for supporting the inverter part, and suppressing the expansion of the area occupied by the inverter part due to the support member, and an electric compressor having the same. .

Furthermore, an object of the present invention is to provide an inverter capable of further reducing the area occupied by the inverter parts by stably installing the inverter parts while standing vertically, and an electric compressor having the same.

In order to achieve the object of the present invention, a support member is provided between the printed circuit board and the inverter component to support the inverter component, wherein the supporting member is one end of the inverter component facing the printed circuit board. There may be provided an inverter in which a component supporting hole is formed to insert the component, and a component supporting surface is formed along a circumferential surface connected to the component supporting hole so that a side surface of the inverter component is seated.

Here, the inner diameter of the component support hole may be formed smaller than the outer diameter of the inverter component.

In addition, in order to achieve the object of the present invention, a printed circuit board; an inverter component coupled to the printed circuit board; a support member provided between the printed circuit board and the inverter component to support the inverter component, wherein the supporting member has a component support hole such that one end of the inverter component facing the printed circuit board is inserted An inverter may be provided in which an inner circumferential surface of the component support hole faces an outer circumferential surface of the inverter component.

Here, one end of the inverter component is formed in a multi-stage structure in which the small-diameter portion and the large-diameter portion are continuous as a step surface, the small-diameter portion of the inverter component protrudes longer than the large-diameter portion in the central region of the large-diameter portion, and the inner diameter of the component support hole is It may be formed to be larger than the outer diameter of the small-diameter portion and smaller than the outer diameter of the large-diameter portion.

And, it is provided along the circumferential surface connected to the component support hole, the component support surface may be formed so that the large-diameter side side of the inverter component is seated.

Here, one end of the inverter component is formed in a multi-stage structure in which the small-diameter portion and the large-diameter portion are continuous as a step surface, the small-diameter portion of the inverter component protrudes longer than the large-diameter portion in the central region of the large-diameter portion, and the component support hole is multi-stage structure, and a minimum inner diameter of the component support hole may be smaller than an outer diameter of the small diameter portion.

In addition, the component support hole includes a first hole into which the small-diameter part is inserted and a second hole into which the large-diameter part is inserted, and between the first hole and the second hole along a circumferential surface connected to the first hole. The first seating surface on which the side surface of the small-diameter part is seated is formed to be stepped, and the second seating surface is provided along the circumferential surface connected to the second hole to seat the side surface of the large-diameter part.

Here, a first fixing part may be formed on the support member, and a second fixing part may be formed on the printed circuit board by coupling the first fixing part to fix the support member to the printed circuit board.

The first fixing part may be formed as a hook protrusion protruding in a direction toward the printed circuit board, and the second fixing part may be formed as a hook groove through which the first fixing part is inserted and coupled.

Here, the support member may have a support protrusion formed along the circumference of the part support hole.

In addition, the support protrusion may be formed to be lower than the height of the inverter component.

In addition, the height of the support protrusion may be formed to be less than half the height of the inverter component.

Here, the inverter component, the inner cap; an outer cap surrounding the inner cap and formed shorter than the inner cap so that an outer circumferential surface of the inverter component forms a stepped surface; and a terminal pin protruding in the axial direction from one longitudinal side of the inner cap and coupled to the printed circuit board, wherein the thickness of the support member is greater than the distance between the end of the inner cap and the end of the outer cap. It may be formed to be greater than or equal to.

In addition, the inner diameter of the part support hole may be greater than or equal to the inner diameter of the inner cap and smaller than or equal to the outer diameter of the outer cap.

Here, the inverter component, the inner cap; an outer cap surrounding the inner cap and formed shorter than the inner cap so that an outer circumferential surface of the inverter component forms a stepped surface; and a terminal pin protruding in the axial direction from one longitudinal side of the inner cap and coupled to the printed circuit board, wherein an end of the inner cap is longer than an end of the outer cap, and an end of the inner cap may be inserted into the component support hole.

Here, the inverter component, the inner cap; an outer cap surrounding the inner cap and formed shorter than the inner cap so that an outer circumferential surface of the inverter component forms a stepped surface; and a terminal pin protruding in the axial direction from one longitudinal side of the inner cap and coupled to the printed circuit board, wherein an end of the inner cap is formed to have the same length as an end of the outer cap, The end of the outer cap may be inserted into the component support hole.

In addition, in order to achieve the object of the present invention, the housing; a motor unit provided in the housing; a compression unit connected to the motor unit, provided in the housing, and driven by the motor unit to compress the refrigerant; and an inverter provided on one side of the housing to control the motor unit, wherein the inverter may be provided with an electric compressor to which the inverter described above is applied.

The inverter and the electric compressor having the same according to this embodiment include a support member provided between the printed circuit board and the inverter part, the support member has a part support hole formed so that one end of the inverter part is inserted, By supporting the outer circumferential surface, the inverter component can be suppressed from being shaken or damaged by vibration while being mounted vertically on the printed circuit board.

In addition, the support member according to this embodiment is inserted between one side of the printed circuit board and the stepped surface provided at one end of the inverter component facing it, and is supported in the axial and radial directions of the inverter component, the supporting member It is possible to stably support the inverter member without forming a thick thickness. Through this, it is possible to suppress an increase in the weight of the compressor while the support member is added.

In addition, since the support member according to the present embodiment is configured to support the inverter component in the longitudinal direction with respect to the printed circuit board, it is possible to suppress the expansion of the area occupied by the inverter component in the printed circuit board.

In addition, since the support member according to the present embodiment is formed to surround the outer circumferential surface of the inverter part, it is possible to lower the processing degree of the support surface of the inverter part, thereby lowering the manufacturing cost of the inverter part.

1 is a perspective view showing the appearance of an electric compressor according to the present invention;
Figure 2 is a cross-sectional view showing the inside of the electric compressor according to Figure 1;
3 is an exploded perspective view of the capacitor from the printed circuit board in FIG. 2;
4 is a perspective view showing the disassembled support plate in FIG. 3;
5 is a plan view showing a state in which the capacitor and the supporting plate are assembled on a printed circuit board;
6 is a sectional view of "IV-IV" in FIG. 5;
7 is an enlarged cross-sectional view of part "A" of FIG. 6;
8 is a cross-sectional view showing another embodiment of the support plate;
9 is a cross-sectional view showing another embodiment of the support plate;
10 is a cross-sectional view showing another embodiment of the capacitor and the support plate.

Hereinafter, an inverter and an electric compressor having the same according to the present embodiment will be described in detail based on the accompanying drawings.

1 is a perspective view showing an external appearance of an electric compressor according to the present invention, and FIG. 2 is a cross-sectional view showing the inside of the electric compressor according to FIG. 1 .

The electric compressor shown in FIGS. 1 and 2 is illustrated _{as an example of an electric compressor using a carbon dioxide (CO 2} ) refrigerant, but may be equally applied to an electric compressor using the refrigerant 134a.

1 and 2 , the electric compressor according to the present embodiment includes a housing 100 , a compression unit 200 , a motor unit 300 , and an inverter unit 400 . The compression unit 200 and the motor unit 300 are installed inside the housing 100 , and the inverter unit 400 is installed outside the housing 100 .

The housing 100 forms the exterior of the electric compressor. The inner space of the housing 100 is sealed, and the compression unit 200 and the motor unit 300 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 .

In addition, as the housing 100 is arranged in the transverse direction with respect to the ground, the compression unit 200 and the motor unit 300 are arranged in the transverse direction, and the compression unit 200 is on the rear side, the motor unit 300 . are installed on the front side, respectively. For convenience, the left side of FIG. 1 is defined as the front side and the right side is defined as the rear side.

1 and 2, the housing 100 according to the present embodiment includes a main housing 110 forming a motor chamber S1, a discharge chamber S2 and a rear forming an oil separation chamber (unsigned). and a housing 120 . 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 is formed in an open shape in which the front and rear are opened. However, the main housing 110 may be formed in a semi-sealed shape with an open rear and a closed front.

In addition, the main housing 110 is formed through the intake port 111 to communicate with the motor chamber (S1). The intake port 111 is formed through the vicinity of the front end of the main housing 110 opposite to the compression unit 200 with respect to the motor unit 300 . Accordingly, the refrigerant sucked into the motor chamber S1 through the intake port 111 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 front side of the fixed scroll 220 to be described later. In the center of the front surface of the rear housing 120, a discharge chamber S2 for accommodating the refrigerant discharged from the compression chamber V is formed between the fixed scroll 220 to be described later, and communicates with the discharge chamber S2. An exhaust port 122 for discharging the refrigerant separated in the oil separation chamber 121 to a condenser (not shown) is formed in communication with the upper side of the oil separation chamber 121 . Accordingly, after the refrigerant discharged from the compression chamber V to the discharge chamber S2 is separated from oil in the oil separation chamber 121 , the refrigerant is discharged to the outside of the compressor toward the condenser through the exhaust port 122 .

Next, the compression unit according to the present embodiment will be described.

Referring to FIG. 2 , the compression unit 200 according to the present embodiment includes a frame 210 , a fixed scroll (or first scroll) 220 fixed to the frame 210 , a frame 210 and a fixed scroll ( 220) and an orbiting scroll (or second scroll) 230 provided between them.

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

In addition, 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 using a fastening force between the two housings 110 and 120 . This embodiment is fixed to the main housing 210 by the latter.

In addition, a bearing accommodating part 211 for accommodating the main bearing 171 is formed in the center of the rear surface of the frame 210 , and a bearing hole 212 for accommodating the rotating shaft 330 in the center of the bearing accommodating part 211 . It is formed through this axial direction.

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

In addition, the first sealing member 181 is inserted into the rear 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 rotating shaft 330 . Accordingly, the first sealing member 181 seals the second sealing member 182 and the back pressure chamber S3 to be described later.

In addition, an anti-rotation mechanism (unsigned) for preventing rotation of the orbiting scroll 230 is provided between the bearing receiving portion 211 and the suction through-hole 213 on the rear surface of the frame 210 . The anti-rotation mechanism (unsigned) may have a pin-and-ring structure as shown in the drawing, but an Oldham ring structure may be applied. Since this is known in the electric compressor, a detailed description thereof will be omitted.

Referring to FIG. 2 , the fixed scroll 220 according to this embodiment is located on the rear surface of the frame 210 , and the orbiting scroll 230 is located between the frame 210 and the fixed scroll 220 .

The fixed scroll 220 may be axially supported by the frame 210 and the rear housing 120 , and may be radially supported by the main housing 110 . However, the fixing method of the fixed scroll 220 is not limited thereto, and may be variously configured according to the shape of the compressor.

The fixed scroll 220 according to the present embodiment includes a fixed head plate portion 221 , a side wall portion 222 , and a fixed wrap 223 .

The fixed head plate part 221 is formed in a substantially disk shape, and one or a plurality of discharge ports 221a are formed in the center or near the center. Since the discharge port 221a discharges the refrigerant from the discharge pressure chamber, which is the final compression chamber, to the discharge chamber S2 , a check valve 225 for opening and closing the discharge port 221a is installed on the rear surface of the fixed end plate 221 .

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

The fixing wrap 223 is formed integrally extending from the front surface of the fixing end plate 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 orbit wrap 232 to be described later. Since this is known in the electric compressor, a detailed description thereof will be omitted.

The orbiting scroll 230 is coupled to the rotating shaft 330 to perform a pivoting motion with respect to the fixed scroll 220 . Accordingly, the fixed scroll 220 and the orbiting scroll 230 form two pairs of compression chambers (V).

Referring to FIG. 2 , the orbiting scroll 230 according to the present embodiment includes a turning head plate part 231 , a turning wrap 232 , and a boss part 233 .

The turning mirror plate part 231 is formed in a substantially disk shape. The outer diameter of the orbiting mirror plate portion 231 is formed smaller than the inner diameter of the side wall portion 222 of the fixed scroll 220 . Accordingly, the orbiting scroll 230 is inserted into the fixed scroll 220 . However, this may vary depending on the type of compressor. For example, the orbiting mirror plate portion 231 may be formed to be larger than the inner diameter of the side wall portion 222 of the fixed scroll 220 to form the bottom surface and the thrust surface of the side wall portion 222 of the fixed scroll 220 .

In addition, a turning wrap 232 engaged with the fixed wrap 223 is formed on the rear surface of the turning mirror plate part 231 . The rear surface of the revolving mirror plate part 231 forms a compression chamber V together with the revolving wrap 232 . Accordingly, the compression chamber V is formed such that the suction pressure chamber V1, the intermediate pressure chamber V2, and the discharge pressure chamber V3 are continuously connected from the outside to the inside.

In addition, a second sealing member 182 for sealing the space between the frame 210 and the frame 210 is provided on the edge of the front surface of the revolving mirror plate portion 231 . The second sealing member 182 seals the back pressure chamber S3 together with the first sealing member 181 described above.

The orbiting wrap 232 is formed integrally extending from the rear surface of the turning mirror plate 231 toward the fixed scroll 220 . Like the fixed wrap 223 described above, the orbiting wrap 232 may be formed in various ways depending on the shape of the compressor, such as an involute shape, a logarithmic spiral shape, or a non-involute shape. In this regard, similar to the fixing wrap, a detailed description will be omitted.

The boss part 233 is formed to extend toward the frame 210 from the center of the front surface of the revolving mirror plate part 231 , and the eccentric bearing 173 is inserted into the boss part 233 and coupled thereto. The eccentric bearing 173 may be a bush bearing or a ball bearing like the main bearing 171 . This embodiment shows an example to which a ball bearing is applied.

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

The motor unit 300 according to the present embodiment 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 may be operated by power applied from the inverter unit 400 and controlled by a control signal. The motor unit 300 is electrically connected to the inverter unit 400 .

Referring to FIG. 2 , the motor unit 300 according to the present embodiment is connected to the compression unit 200 by a rotation shaft 330 , which will be described later. One end of the rotating shaft 330 is coupled to a rotor 320 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 rotating shaft 330 .

The motor unit 300 includes a stator 310 fixed to the housing 100 and a rotor 320 rotatably provided to the stator 310 . The stator 310 forms an electromagnetic field by the power applied from the inverter unit 400 , and the rotor 320 turns the rotational force of the motor unit 300 while being induced by the electromagnetic field formed by the stator 310 and rotating. It is transmitted to the scroll 230 .

The stator 310 includes a stator core 311, a winding coil 312 wound around the stator core 311, and a plurality of coil insulating members 313 that insulate between the stator core 311 and the winding coil 312. do.

The stator core 311 is formed by laminating a plurality of thin electrical steel sheets in the axial direction. 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 itself does not rotate even when power and a control signal are applied from the inverter unit 400 .

The rotor 320 is spaced apart from the stator 310 by a predetermined gap. Accordingly, in a state in which the stator 310 is fixed, the rotor 320 may be rotated by the electromagnetic field.

The rotor 320 according to this embodiment includes a rotor core 321 and a permanent magnet (not shown).

The rotor core 321 is formed by laminating a plurality of thin electrical steel sheets in an annular shape like the stator core 311 in the axial direction. The rotor core 321 is rotatably installed inside the stator core 311 . A rotating shaft 330 is fixedly coupled to the rotor core 321 by hot pressing or the like.

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

The inverter unit 400 according to the present embodiment controls the operation of the electric compressor by applying or releasing power and a control signal to the motor unit 300 . Accordingly, the inverter unit 400 is energably connected to the motor unit 300 , and transmits power and control signals received from the outside to the motor unit 300 .

In addition, the inverter unit 400 is installed on the front side of the main housing (110). Accordingly, the exterior of the inverter unit 400 may be formed of an insulating material. However, when the front end of the main housing 110 is opened, the inverter housing 410 to be described later covers the front end of the main housing 110 to form a part of the housing 100 and support one end of the rotation shaft. . Therefore, the inverter housing 410 may be preferably formed of the same metal material as the main housing 110 in terms of strength.

Referring to FIG. 2 , the inverter unit 400 according to the present embodiment 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 an exterior of the inverter unit 400 . The inverter housing 410 is coupled to the front side of the main housing 110 to cover the front side of the main housing 110 .

Here, the rotating shaft support 411 is provided at the center of the rear surface of the inverter housing 410 facing the motor 300 , and around the rotating shaft supporting part 411 , around the rotating shaft supporting part 411 along the circumferential direction. Airtight terminal insertion holes (not shown) may be formed at a predetermined interval.

The inverter cover 420 is coupled to the inverter housing 410 . Accordingly, an inverter chamber is formed between the inverter cover 420 and the inverter housing 410 , and the inverter unit 430 may be accommodated therein.

In addition, the inverter cover 420 and the inverter housing 410 may be coupled by a separate fastening means (not shown). The shape of the inverter cover 420 is preferably formed to correspond to the shape of the inverter housing 410 .

The inverter unit 430 is electrically connected to the power connector 441 and the communication connector 442 provided in the inverter housing 410 to receive power and control signals for driving the motor unit 300 . The power and control signals are transmitted to the motor unit 300 .

In addition, the inverter unit 430 is coupled to or supported by a printed circuit board (PCB) 431 , an electronic device 432 mounted on the printed circuit board 431 , and the inverter housing 410 to provide a printed circuit board 431 . ) includes an electrical component 433 connected to.

The electronic devices 432 include fixed resistors, diodes, drivers, and the like, and the electrical components 433 include transistors, capacitors, inductors, and the like. Hereinafter, for convenience, the electronic device 432 and the electrical component 433 may be collectively referred to as an inverter component.

Most of the inverter parts are laid down in the lateral direction and mounted or connected to the printed circuit board 431 . However, some inverter components may be mounted or connected to the printed circuit board 431 in a vertical direction (vertical type, vertical type). In particular, when a bulky component, such as a capacitor, is mounted or connected to the printed circuit board 431 in a horizontal direction, the space occupied by the printed circuit board 431 is large, so the space to install other components may be insufficient.

Therefore, it may be preferable that large components such as capacitors are mounted or connected to the printed circuit board 431 in a vertical direction to reduce the area occupied by the printed circuit board 431 . However, since the structure that is mounted or connected to the printed circuit board 431 in the vertical direction is vulnerable to vibration, the terminal pins connecting the capacitor body to the printed circuit board 431 may be damaged. In particular, when the motor-driven compressor is mounted on a vehicle, it is subjected to greater vibration, and thus the capacitor may be damaged or the reliability of the inverter and the motor-driven compressor employing the same may be greatly reduced.

Accordingly, in this embodiment, it is an object to provide a support structure capable of securing reliability against vibration while installing large components such as capacitors in a vertical shape with respect to the printed circuit board. Hereinafter, although the capacitor is mainly described, it is not necessarily limited to the capacitor.

3 is a disassembled perspective view of the capacitor from the printed circuit board in FIG. 2 , FIG. 4 is an exploded perspective view of the support plate in FIG. 3 , and FIG. 5 is a state in which the capacitor and the supporting plate are assembled to the printed circuit board 6 is a cross-sectional view "IV-IV" in FIG. 5, and FIG. 7 is an enlarged cross-sectional view of part "A" of FIG.

3 to 7 , in the inverter unit 430 according to the present embodiment, a support plate 436 may be provided between the printed circuit board 431 and the capacitor 435 . The support plate 436 is a support member serving to fill a gap between the printed circuit board 431 and the capacitor 435 to suppress the capacitor 435 from shaking with respect to the printed circuit board 431 .

In addition, the support plate 436 is preferably formed of an insulating material such as plastic. However, as the support plate 436 is positioned between the printed circuit board 431 and the capacitor 435 , it may be formed of a material having elasticity such as rubber to absorb vibration.

In addition, the support plate 436 may be formed to accommodate the capacitor 435 almost completely, but in this case, the production of the support plate 436 may be complicated or the volume of the support plate 436 may be increased. have. Therefore, in this embodiment, it is desirable to form the shape of the support plate 436 as simply as possible to facilitate fabrication of the support plate 436 and to make the area occupied by the support plate 436 as small as possible. .

For example, the support plate 436 according to the present embodiment includes a plate body 436a, a component support hole 436b, and a component support surface 436c.

The plate body 436a is formed in a flat plate shape like the printed circuit board 431 .

As described above, the plate body 436a is preferably made of an insulating material such as plastic, and both sides thereof are formed flat. However, in some cases, a plurality of spacer protrusions (not shown) may be formed on the rear surface facing the printed circuit board 431 . Accordingly, it is possible to suppress the formation of moisture between the printed circuit board 431 and the support plate 436 while being spaced apart between the printed circuit board 431 and the support plate 436 .

In addition, the thickness t1 of the plate body 436a affects the weight and size of the inverter unit 400 including the support plate 436 . Therefore, the thickness t1 of the plate body 436a is preferably formed as thin as possible. However, the thickness t1 of the plate body 436a is preferably formed in association with the step height h1 of the capacitor 435 to be described later.

Here, the capacitor 435 may be variously applied to an electrolytic capacitor, a ceramic capacitor, a variable capacitor, etc., but in this embodiment, an electrolytic capacitor in which an electrolyte is accommodated will be described as an example. Accordingly, hereinafter, the capacitor 435 may be understood as an electrolytic capacitor.

3 and 6 , the capacitor 435 includes a capacitor body 435a, a plurality of terminals extending from the capacitor body 435a and being inserted into the pin holes 431a of the printed circuit board 431 and electrically connected. and a pin 435b.

The capacitor body 435a may include an inner cap 435a1 in which an electrolyte is accommodated, and an outer cap 435a2 surrounding the inner cap 435a1. The plurality of terminal pins 435b are one side (precisely, a front side facing the printed circuit board 431) of the inner cap 435a1, and hereinafter, the side facing the printed circuit board 431 is defined as the first end. ) is drawn from The plurality of terminal pins 435b are inserted into connection holes provided in the printed circuit board 431 and fixed by soldering on the opposite surface. Accordingly, the capacitor 435 is electrically connected to the printed circuit board 431 .

The outer diameter of the inner cap 435a1 is smaller than the outer diameter of the outer cap 435a2, and the length of the first end of the inner cap 435a1 is longer than the length of the first end of the outer cap 435a2. That is, the inner cap 435a1 forming the small diameter portion of the capacitor body 435a protrudes in the longitudinal direction from the center of the outer cap 435a2 forming the large diameter portion of the capacitor body 435a. Accordingly, the cross section of the inner cap 435a1, the outer circumferential surface of the inner cap 435a1, and the cross section of the outer cap 435a2 on the outer circumferential surface of the inner cap 435a1 form a kind of stepped portion described above.

Accordingly, the thickness of the support plate 436 described above is approximately equal to or slightly thicker than the axial height of the step, that is, the gap (step height) h1 between the inner cap 435a1 and the outer cap 435a2. It may be desirable to form

4, the component support hole (436b) is formed through the plate body (436a). The component support hole 436b is formed to have the same inner diameter, that is, one inner diameter between both ends of the component support hole 436b.

Although not shown in the drawings, the component support hole 436b may be formed in a multi-stage structure. In this case, the minimum inner diameter of the component support hole 436b may be smaller than the outer diameter of the inner cap 435a1 of the capacitor 435 . Through this, the inner cap 435a1 of the capacitor 435 can be inserted and seated in the component support hole 436b. Then, not only the component support surface 436c but also the component support hole 436b can support the capacitor 435 in the axial direction, thereby increasing the vibration durability of the capacitor 435 .

In addition, a plurality of component support holes 436b are provided and are formed at positions corresponding to the plurality of capacitors 435, respectively. However, in some cases, the component support hole 436b may be formed as one to accommodate the plurality of capacitors 435 at once. In this case, the component support surface 436c, which will be described later, may be formed to form a closed loop along the outline among the plurality of capacitors 435 .

Referring to FIG. 7 , the inner diameter D1 of the component support hole 436b is equal to or slightly larger than the outer diameter D2 of the inner cap 435a1, and is smaller than or equal to the outer diameter D3 of the outer cap 435a2. can be formed. Preferably, the inner diameter D1 of the component support hole 436b may be larger than the outer diameter D2 of the inner cap 435a1 and smaller than the outer diameter D3 of the outer cap 435a2.

Accordingly, the first end of the inner cap 435a1 is inserted into the component supporting hole 436b, while the first end of the outer cap 435a2 is not inserted into the component supporting hole 436b and the component supporting hole 436b. ) is caught and seated on the part support surface 436c connected to it.

4 and 5, the component support surface (436c) is formed on the peripheral surface connected to the inner peripheral surface of the component support hole (436b). The component support surface 436c is formed at the same height as the other surface of the plate body 436a formed around the component support surface 436c, that is, between the plurality of component support holes 436b.

However, in some cases, the height of the component support surface 436c may be formed higher than the periphery. In this case, the component support surface 436c may be formed in an annular or arc shape. Through this, when the capacitors 435 are spaced apart from each other and the gap between the capacitors 435 is long, the thickness of the support plate 436 in an unnecessary portion can be reduced, thereby reducing the weight of the support plate 436 as a whole.

As described above, when the inner diameter of the component support hole 436b is larger than the inner cap 435a1 and smaller than the outer cap 435a2, the end of the inner cap 435a1 facing the printed circuit board 431 is the support plate. It is inserted into the component supporting hole 436b of 436 and supported in the radial direction, and the end of the outer cap 435a2 is seated on the component supporting surface 436c adjacent to the component supporting hole 436b and supported in the axial direction. .

Then, even if external vibration is transmitted to the inner cap 435a1 and the outer cap 435a2 constituting the capacitor body 435a through the terminal pin 435b, the vibration is transmitted to the component support hole 436b and the component support surface 436c. will be offset by Then, shaking of the capacitor 435 due to external vibration is suppressed, thereby preventing the thin terminal pin 435b from being damaged in advance.

Meanwhile, the support plate 436 may be fixed to the printed circuit board 431 by having a fixing part.

For example, referring to FIGS. 4 and 6 , a first fixing part 436d made of a hook projection is formed on the plate body 436a of the support plate 436 , and the first fixing part 436d corresponds to that. A second fixing part 431b having a hook groove may be formed on the printed circuit board 431 .

Accordingly, the first fixing portion 436d of the support plate 436 may be hook-coupled to the second fixing portion 431b of the printed circuit board 431 , and then the support plate 436 may be connected to the printed circuit board 431 . ) can be inhibited. Then, even if the capacitor 435 placed on the support plate 436 receives lateral vibration, the lateral vibration is canceled by the first fixing part 146d and the second fixing part 431b, so that the printed circuit board 431 ), the load applied to the terminal pin 435b coupled to it may be reduced. Through this, damage to the terminal pin 435b can be more effectively suppressed.

Although not shown in the drawings, the fixing part may be screwed together without being hooked, and one side is hooked to the other side by forming a stopping protrusion protruding in the opposite direction to the support plate 436 or the printed circuit board 431 . It can also be supported.

However, the fixing part is not necessarily required. That is, since the capacitor 435 is suppressed from shaking by the support plate 436, the load applied to the terminal pin 435b is reduced, so even if the fixing part described above is not provided, damage to the terminal pin 435b can be suppressed. have.

On the other hand, there is another embodiment of the support plate as follows.

That is, in the above embodiment, the upper surface of the plate body 436a is formed to be flat, but in this embodiment, the support protrusion surrounding the outer circumferential surface of the capacitor 435 is formed on the upper surface of the plate body 436a.

8 is a cross-sectional view showing another embodiment of the support plate.

Referring to FIG. 8 , the plate body 436a according to this embodiment is provided with a component support hole 436b and a component support surface 436c, and a hollow component is fixed along the circumference of the component support surface 436c. A protrusion 436e is formed.

Since the component support hole 436b and the component support surface 436c are the same as in the above-described embodiment, a detailed description thereof will be omitted. However, the parts fixing protrusions 436e according to the present embodiment are not provided in the above-described embodiment, and the parts fixing protrusions will be described below.

The part fixing protrusion 436e according to FIG. 8 may be formed in an annular shape, but in some cases, it may be formed by being divided into a plurality of parts at a predetermined interval along the circumferential direction.

The inner diameter D4 of the part fixing protrusion 436e may be greater than or equal to the outer diameter D3 of the capacitor 435 , that is, the outer diameter D3 of the outer cap 435a2 . Accordingly, the capacitor 435 may be inserted into the part fixing protrusion 436e and supported in the radial direction, more precisely, in the shaking direction.

In addition, the height (h2) of the part fixing protrusion (436e) may be formed to be less than or equal to the length (h3) of the capacitor (435). However, since the weight of the support plate 436 increases as the height h2 of the part fixing protrusion 436e increases, it is preferable to be formed as low as possible within the range for supporting the outer circumferential surface of the capacitor 435 . For example, the height h2 of the part fixing protrusion 436e may be preferably formed to be less than or equal to about half of the length h3 of the capacitor 435 .

As described above, even when the part fixing protrusion 436e is formed on the plate body 436a, the basic configuration and the effect thereof are almost similar to those of the above-described embodiment. However, in the present embodiment, as the capacitor 435 is inserted into the part fixing protrusion 436e and supported in the radial direction as described above, the capacitor 435 can be more stably supported. Accordingly, it is possible to effectively suppress damage to the terminal pins 435b and the like by stably supporting the capacitor 435 even if it is mounted on a vehicle and receives a large vibration.

Meanwhile, in the above embodiments, the support plate is inserted between the stepped portion of the capacitor, that is, between the inner cap and the outer cap to support the capacitor, but in this embodiment, the support plate supports the outer peripheral surface of the capacitor.

9 is a cross-sectional view showing another embodiment of the support plate.

Referring to FIG. 9 , in the plate body 436a according to the present embodiment, a component support hole 436b is formed.

The inner diameter D1' of the component supporting hole 436b may be greater than or equal to the outer diameter of the capacitor, that is, the outer diameter D3 of the outer cap 435a2. To be precise, it is preferable that the inner diameter D1' of the component support hole 436b is slightly larger than the outer diameter D3 of the outer cap 435a2 so that the capacitor 435 can be easily inserted. However, in this case, the radial distance t2 between the component support hole 436b and the outer cap 435a2 is smaller than the height h1 of the step between the inner cap 435a1 and the outer cap 435a2. It is preferable because it can support stably.

In addition, the thickness t1' of the plate body 436a according to the present embodiment is formed to be larger than the height h1 of the step portion. Through this, the inner circumferential surface of the component support hole 436b overlaps the outer circumferential surface of the outer cap 435a2 in the longitudinal direction. Then, the inner circumferential surface of the component support hole 436b is substantially in surface contact with the outer circumferential surface of the outer cap 435a2 to suppress lateral vibration of the capacitor.

As described above, even when the component support hole is formed to be larger than the capacitor, the basic configuration of the support plate and the effect thereof are almost similar to those of the above-described embodiment. However, in the present embodiment, as the capacitor 435 is supported using the component support hole 436b of the support plate 436 , the degree of design freedom with respect to the thickness of the support plate 436 is high. Through this, it may be easy to process the support plate.

Meanwhile, in the above embodiments, the first end of the capacitor is formed to be stepped, but in this embodiment, the capacitor is supported by using the support plate even when the stepped portion is not formed at the first end of the capacitor.

10 is a cross-sectional view showing another embodiment of the capacitor and the support plate.

Referring to FIG. 10 , in the capacitor 435 according to the present embodiment, the length of the inner cap 435a1 and the outer cap 435a2 is the same, or the length of the outer cap 435a2 is the length of the inner cap 435a1. It may be formed longer. Then, the step portion is not formed at the first end of the capacitor body 435a or the step portion is formed inward.

In addition, a component support hole 436b is formed in the plate body 436a of the support plate 436 .

The inner diameter D1' of the component supporting hole 436b may be greater than or equal to the outer diameter of the capacitor, that is, the outer diameter D3 of the outer cap 435a2. To be precise, it is preferable that the inner diameter D1' of the component support hole 436b is slightly larger than the outer diameter D3 of the outer cap 435a2 so that the capacitor 435 can be easily inserted. However, in this case, the radial distance t2 between the component support hole 436b and the outer cap 435a2 is smaller than the height h1 of the step between the inner cap 435a1 and the outer cap 435a2. It is preferable because it can support stably.

In addition, in this embodiment, since the step portion is not formed at the first end of the capacitor 435 ′, the thickness t1″ of the plate body 436a according to the present embodiment is the plate body according to the embodiment of FIG. 9 . It may be formed to be thinner than the thickness t1 ′ of the capacitor 436a. ') can suppress lateral vibration.

As described above, even when the step portion is not formed at the end of the capacitor, the basic configuration of the support plate and the effect thereof are almost similar to those of the above-described embodiment. However, in the present embodiment, as described above, the support plate 436 can stably support the capacitor 435 ′ even if the step portion is not formed at the end of the capacitor 435 ′. Accordingly, since the end of the capacitor 435 ′ facing the printed circuit board does not need to be precisely processed, the capacitor 435 ′ may be easily manufactured.

Meanwhile, in the above embodiments, the description has been focused on an example in which the rotating shaft is coupled to one side of the orbiting scroll, but the same may be applied to a through-axis scroll compressor in which the rotating shaft passes through the orbiting scroll.

100: housing 110: main housing
120: rear housing 200: compression unit
210: frame 220: fixed scroll
230: orbiting scroll 300: motor unit
310: stator 311: stator core
312: winding coil 400: inverter unit
410: inverter housing 420: inverter cover
430: inverter unit 431: printed circuit board
431a: pin hole 431b: second fixing part (hook groove)
432: electronic device 433: electrical parts
435: capacitor (inverter part) 435a: capacitor body
435a1: inner cap 435a2: outer cap
435b: terminal pin 436: support plate
436a: plate body 436b: part support hole
436c: part support surface 436d: first fixing part (hook projection)
436e: part fixing protrusion S1: motor room
S2: discharge chamber S3: back pressure chamber
V: compression chamber t1: support plate thickness
t2: radial distance between inner cap and outer cap
h1: height of step h2: height of part fixing protrusion
h3: length of capacitor D1: inner diameter of part support hole
D2: inner diameter of inner cap D3: inner diameter of outer cap

Claims (15)

printed circuit board;
an inverter component coupled to the printed circuit board;
a support member provided between the printed circuit board and the inverter component to support the inverter component;
The support member is
A component supporting hole is formed so that one end of the inverter component facing the printed circuit board is inserted, and an inner circumferential surface of the component supporting hole is formed to face an outer circumferential surface of the inverter component. According to claim 1,
One end of the inverter component is formed in a multi-stage structure in which a small-diameter portion and a large-diameter portion are continuous as a step surface, and the small-diameter portion of the inverter component protrudes longer than the large-diameter portion in the central region of the large-diameter portion,
The inner diameter of the component support hole is larger than the outer diameter of the small diameter portion, the inverter is formed smaller than the outer diameter of the large diameter portion. 3. The method of claim 2,
An inverter provided along a circumferential surface connected to the component support hole to form a component support surface so that a large-diameter side surface of the inverter component is seated. According to claim 1,
One end of the inverter component is formed in a multi-stage structure in which a small-diameter portion and a large-diameter portion are continuous as a step surface, and the small-diameter portion of the inverter component protrudes longer than the large-diameter portion in the central region of the large-diameter portion,
The component support hole is formed in a multi-stage structure, and a minimum inner diameter of the component support hole is smaller than an outer diameter of the small diameter portion. 5. The method of claim 4,
The component support hole includes a first hole into which the small-diameter part is inserted and a second hole into which the large-diameter part is inserted,
Between the first hole and the second hole, a first seating surface on which a side surface of the small-diameter portion is seated is formed to be stepped along a circumferential surface connected to the first hole,
The inverter is provided along a circumferential surface connected to the second hole so that a second seating surface is formed so that a side surface of the large-diameter part is seated. According to claim 1,
A first fixing part is formed on the support member,
The printed circuit board is coupled to the first fixing portion to form a second fixing portion for fixing the support member to the printed circuit board. 7. The method of claim 6,
The first fixing part is formed with a hook protrusion protruding in a direction toward the printed circuit board,
The second fixing part is formed as a hook groove through which the first fixing part is inserted and coupled to. According to claim 1,
The support member has an inverter in which a support protrusion is formed along a circumference of the part support hole. 9. The method of claim 8,
The support protrusion is formed lower than the height of the inverter component. 10. The method of claim 9,
The height of the support protrusion is formed to be less than half the height of the inverter component. According to claim 1,
The inverter parts are
inner cap;
an outer cap surrounding the inner cap and formed shorter than the inner cap so that an outer circumferential surface of the inverter component forms a stepped surface; and
a terminal pin protruding in the axial direction from one longitudinal side of the inner cap and coupled to the printed circuit board; and
The thickness of the support member is formed to be greater than or equal to a distance between the end of the inner cap and the end of the outer cap. 12. The method of claim 11,
The inner diameter of the part support hole is greater than or equal to the inner diameter of the inner cap and smaller than or equal to the outer diameter of the outer cap. According to claim 1,
The inverter parts are
inner cap;
an outer cap surrounding the inner cap and formed shorter than the inner cap so that an outer circumferential surface of the inverter component forms a stepped surface; and
a terminal pin protruding in the axial direction from one longitudinal side of the inner cap and coupled to the printed circuit board; and
An end of the inner cap is formed longer than an end of the outer cap, and the end of the inner cap is inserted into the component support hole. According to claim 1,
The inverter parts are
inner cap;
an outer cap surrounding the inner cap and formed shorter than the inner cap so that an outer circumferential surface of the inverter component forms a stepped surface; and
a terminal pin protruding in the axial direction from one longitudinal side of the inner cap and coupled to the printed circuit board; and
An end of the inner cap is formed to have the same length as an end of the outer cap, and the end of the outer cap is inserted into the component support hole. housing;
a motor unit provided in the housing;
a compression unit connected to the motor unit, provided in the housing, and driven by the motor unit to compress the refrigerant; and
and an inverter provided on one side of the housing to control the motor unit;
The inverter is an electric compressor according to any one of claims 1 to 14.

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