KR20210098341A - Electric compressor, inverter manufacturing equipment and inverter manufacturing method - Google Patents

Abstract

The present invention relates to an electric compressor, an inverter manufacturing device, and an inverter manufacturing method. An inverter of the electric compressor includes a substrate on which a plurality of elements are mounted and a frame coupled to the substrate. The frame includes a support plate, a side plate part protruding from the support plate toward the substrate, an array plate on which a switching element connected to the substrate is arranged, and a connection bar for connecting the support plate and the array plate. The inverter manufacturing device includes a first dummy plate fixed to the frame and a second dummy plate fastened with the first dummy plate to be in contact with the switching element and configured to fix and dissipate the elements and the switching element. The inverter manufacturing method comprises: a step of seating the inverter on the first dummy plate; a step of fastening the second dummy plate to the first dummy plate to fix the elements and the switching element and connecting the switching element to a heat sink of the second dummy plate; and a step of soldering the elements. Therefore, soldering defects and damaged elements can be prevented.

Description

Electric compressor, inverter manufacturing apparatus and inverter manufacturing method

The present invention relates to an electric compressor, an inverter manufacturing apparatus and an inverter manufacturing method, and more particularly, to an electric compressor, an inverter assembly jig and It relates to a method of manufacturing an inverter.

In general, a compressor used in an air conditioning system of a vehicle performs a function of sucking a refrigerant that has been evaporated from an evaporator, making it a high temperature and high pressure state that is easy to liquefy, and transferring it to a condenser.

Such a compressor is divided into a mechanical compressor that performs a compression operation by receiving driving force from the engine of the vehicle, and an electric compressor that performs a compression operation by driving an electric motor (hereinafter referred to as a motor) according to a separate power supply. It is formed so that the cooling efficiency is variably adjusted while the rotation speed and torque of the motor are controlled.

Looking at the motor-driven compressor in more detail, the conventional motor-driven compressor includes a motor for generating power, a compression mechanism for receiving power from the motor to compress a refrigerant, and an inverter for controlling the motor.

Here, the inverter includes a substrate on which a plurality of elements are mounted and a frame on which a switching element is disposed and fastened to the substrate, the plurality of elements are arranged on the substrate, the frame is assembled on the substrate, and the inverter manufacturing apparatus After being seated on a pallet, the device is soldered by, for example, a selective soldering method.

However, in the conventional motor-driven compressor, inverter manufacturing apparatus, and inverter manufacturing method, there is a problem in that a plurality of elements are not fixed before the soldering process, so that they are separated from a predetermined position, thereby causing a soldering defect.

In addition, there is a problem in that the heat-sensitive switching element is damaged by heat due to soldering.

In addition, there is a problem in that the inverter is damaged due to heat generated by the switching elements when inspecting whether the plurality of elements and the switching elements operate normally after soldering.

In addition, since the stress applied to the plurality of elements and the switching element during soldering and the stress applied to the plurality of elements and the switching element after the inverter is mounted on the motor-compressor are different, after the inverter is mounted on the motor-compressor, There was a problem in that the soldering part was damaged.

Republic of Korea Patent Publication No. 10-2019-0125931

Accordingly, an object of the present invention is to provide a motor-driven compressor, an inverter manufacturing apparatus, and an inverter manufacturing method capable of preventing soldering defects by preventing a plurality of elements from being separated from a predetermined position.

Another object of the present invention is to provide an electric compressor, an inverter manufacturing apparatus, and an inverter manufacturing method capable of preventing a switching element from being damaged by heat due to soldering.

In addition, the present invention provides an electric compressor, an inverter manufacturing apparatus, and an inverter manufacturing method that can prevent damage to the inverter due to heat of the switching element when inspecting whether a plurality of elements and switching elements operate normally after soldering for another purpose.

In addition, the present invention provides an electric compressor and an inverter manufacturing apparatus capable of preventing damage to soldered portions of a plurality of elements after the inverter is mounted on the electric compressor due to a difference in stress applied to a plurality of elements and a switching element And it is another object to provide a method of manufacturing an inverter.

The present invention, to achieve the object as described above, the housing; a motor provided inside the housing; a compression mechanism receiving power from the motor and compressing the refrigerant; and an inverter for controlling the motor, wherein the inverter includes a substrate on which a plurality of elements are mounted and a frame coupled to the substrate, wherein the frame includes a support plate, a side plate portion protruding from the support plate toward the substrate; Provided is an electric compressor comprising an arrangement plate on which switching elements connected to the substrate are arranged, and a connection bar connecting the support plate and the arrangement plate.

A fastening hole for fastening to the housing may be formed in the side plate portion.

The support plate and the arrangement plate may be formed to be spaced apart from each other, one end of the connection bar may be connected to the support plate, and the other end of the connection bar may be connected to the arrangement plate.

A plurality of connection bars may be formed, and the plurality of connection bars may be disposed along an outer periphery of the arrangement plate.

The support plate may include a filter accommodating part in which the filter element 141a is disposed, and one end of the plurality of connection bars may be connected to the filter accommodating part of the support plate and the other end may be connected to the arrangement plate.

The connection bar may be formed such that the arrangement plate is relatively movable in a direction toward and away from the substrate with respect to the support plate.

The arrangement plate may include a barrier rib that surrounds the switching element and protrudes in a thickness direction of the switching element.

A plurality of the switching elements may be formed, and the plurality of switching elements may be disposed to face each other in a double row.

In addition, the present invention provides a first dummy plate fixed to the frame of an inverter having a substrate on which a plurality of elements of the electric compressor are mounted and a frame on which a switching element is disposed; and a second dummy plate fastened to the first dummy plate and in contact with the switching element, the second dummy plate fixing and dissipating the switching element and the plurality of elements.

The second dummy plate may include a heat sink, and the heat sink may be formed to contact the switching element when the second dummy plate is coupled to the first dummy plate.

The frame includes a support plate, an array plate on which the switching elements are arranged, and a connection bar connecting the support plate and the array plate, and the heat sink connects the switching element when the second dummy plate is fastened to the first dummy plate. Press to change the relative position of the arrangement plate with respect to the support plate and may be formed to be in close contact with the switching element by the restoring force of the connection bar.

The frame includes a fastening hole fastened to the housing, and the first dummy plate includes a first base plate opposite to the substrate side and a first side plate bent from the first base plate and surrounding the outer periphery of the inverter, , the first base plate includes a guide pin inserted into the fastening hole and an opening exposing the board for soldering, and the first side plate has a fixing hole into which a fixture for fastening with the second dummy plate is inserted. may include

The first side plate may further include a mounting hole into which a mounting pin for simultaneously soldering a plurality of the inverters is inserted.

The second dummy plate may include a second base plate facing the frame side; a second side plate bent from the second base plate and fastened to the first side plate; and a heat sink installed on the second base plate and heat-exchangeable with the heat dissipation fins. may further include.

The switching element may be formed in plurality, the heat sink may be formed in the same number as the switching element, and the second dummy plate may include an insulating bracket to insulate the plurality of heat sinks from each other.

The second dummy plate may include insulating paper that insulates the heat sink from the plurality of heat sinks.

In addition, the present invention provides a first preparation step of inserting a guide pin of the inverter manufacturing apparatus into a fastening hole of the frame and seating the inverter on the first dummy plate; a second preparation step of fixing the device of the inverter by fastening the second dummy plate to the first dummy plate, and connecting the device to the heat sink of the second dummy plate; a soldering step of soldering the element; and withdrawing the inverter from the inverter manufacturing apparatus.

The method may further include an inspection step of inspecting whether the device operates normally between the soldering step and the withdrawing step.

A third preparation step of seating the assembly between the inverter and the inverter manufacturing apparatus on a pallet between the second preparation step and the soldering step; further comprising, wherein the soldering step is performed when a plurality of the assemblies are seated on the pallet It is possible to simultaneously solder the elements of a plurality of the assemblies seated on the pallet.

In the case of the motor-driven compressor, the inverter manufacturing apparatus, and the inverter manufacturing method according to the present invention, the inverter of the motor-compressor includes a substrate on which a plurality of elements are mounted and a frame coupled to the substrate, wherein the frame includes a support plate and the substrate from the support plate. and a side plate protruding toward the side plate, an array plate on which a switching element connected to the substrate is arranged, and a connection bar connecting the support plate and the array plate, wherein the inverter manufacturing apparatus includes a first dummy plate fixed to the frame and the second plate 1 comprising a second dummy plate coupled to a dummy plate to contact the switching device and fixing and dissipating the plurality of devices and the switching devices, the method comprising: seating the inverter on the first dummy plate; fastening the second dummy plate to the first dummy plate to fix the plurality of devices and the switching devices, and connecting the switching devices to the heat sink of the second dummy plate, and soldering the plurality of devices. By including, it is possible to prevent the plurality of elements from being separated from a predetermined position, thereby preventing soldering failure.

In addition, as heat applied to the plurality of elements and the switching element is radiated by the second dummy plate, damage to the switching element by heat due to soldering may be prevented.

In addition, as the heat generated by the switching element is dissipated by the second dummy plate, the inverter is prevented from being damaged by the heat of the switching element when inspecting whether the plurality of elements and the switching element operate normally. can be

In addition, the second dummy plate presses the inverter so that the same level of stress as when the inverter is mounted on the electric compressor is applied to the plurality of elements and the switching element even during soldering, the plurality of elements and Due to the difference in stress applied to the switching element, it is possible to prevent damage to the soldered portion of the plurality of elements after the inverter is mounted on the motor-driven compressor.

1 is a cross-sectional view showing an electric compressor according to an embodiment of the present invention;
2 is a plan view showing the inverter for the electric compressor of FIG. 1 from the frame side;
3 is a front view showing a first dummy plate of the inverter manufacturing apparatus used for soldering the inverter for the electric compressor of FIG. 1;
4 is a front view showing a second dummy plate of the inverter manufacturing apparatus used for soldering the inverter for the electric compressor of FIG. 1;
Figure 5 is a rear view of Figure 4;
6 is a perspective view showing a state in which the inverter for the electric compressor of FIG. 1 is seated on the first dummy plate of FIG. 3;
7 is a perspective view illustrating a state in which the second dummy plate of FIGS. 4 and 5 is fastened to the first dummy plate on which the inverter of FIG. 6 is seated;
8 is a bottom view of FIG. 7;
9 is a cross-sectional view illustrating a step of seating the inverter on the first dummy plate during the process of soldering the inverter for the electric compressor of FIG. 1 using the inverter manufacturing apparatus of FIGS. 3 to 5;
10 is a cross-sectional view illustrating a step of fastening the second dummy plate to the first dummy plate as a next step of FIG. 9;
11 is a cross-sectional view showing the step of seating the assembly between the plurality of inverters and the inverter manufacturing apparatus on the pellet as the next step of FIG.
Fig. 12 is a cross-sectional view showing a step of soldering as a next step of Fig. 11;
13 is a cross-sectional view showing the step of inspecting whether the device operates normally after withdrawing the assembly from the pellet as the next step of FIG. 12;
14 is a cross-sectional view illustrating a step of withdrawing the inverter from the inverter manufacturing apparatus as a next step of FIG. 13 .

Hereinafter, an electric compressor, an inverter manufacturing apparatus, and an inverter manufacturing method according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing an electric compressor according to an embodiment of the present invention, FIG. 2 is a plan view showing the electric compressor inverter of FIG. 1 from the frame side, and FIG. 3 is a soldering of the electric compressor inverter of FIG. It is a front view showing a first dummy plate among the inverter manufacturing apparatus used for 4, FIG. 6 is a perspective view showing a state in which the inverter for the electric compressor of FIG. 1 is seated on the first dummy plate of FIG. 3, and FIG. 7 is a view on the first dummy plate on which the inverter of FIG. 6 is seated 4 and 5 are perspective views illustrating a state in which the second dummy plate is fastened, FIG. 8 is a bottom view of FIG. 7 , and FIGS. 9 to 14 are views of FIG. 1 using the inverter manufacturing apparatus of FIGS. 3 to 5 . Cross-sectional views schematically illustrating a process of soldering an inverter for an electric compressor.

Here, FIG. 9 is a cross-sectional view illustrating the step of seating the inverter on the first dummy plate, and FIG. 10 is a cross-sectional view illustrating the step of fastening the second dummy plate to the first dummy plate as the next step of FIG. 11 is a cross-sectional view showing the step of seating the assembly between a plurality of inverters and the inverter manufacturing apparatus on the pellet as the next step of FIG. 10, FIG. 12 is a cross-sectional view showing the soldering step as the next step of FIG. As the next step of FIG. 12, it is a cross-sectional view showing the step of inspecting whether the device operates normally after withdrawing the assembly from the pellet, and FIG. 14 is a cross-sectional view showing the step of withdrawing the inverter from the inverter manufacturing apparatus as the next step of FIG. am.

1, the motor-driven compressor 100 according to an embodiment of the present invention includes a housing 110, a motor 120 provided in the inner space of the housing 110 and generating power, and the motor It may include a compression mechanism 130 for receiving power from 120 to compress the refrigerant and an inverter 140 for controlling the motor 120 .

The housing 110 includes a motor housing 112 having a motor accommodating space in which the motor 120 is accommodated, and a front housing 114 coupled to one side of the motor housing 112 and accommodating the compression mechanism 130 . , a rear housing 116 coupled to the other side of the motor housing 112 and accommodating the inverter 140 and an inverter cover 118 coupled to the rear housing 116 and covering the inverter 140 . can do.

The motor 120 includes a stator 122 fixed to the inside of the motor housing 112 , a rotor 124 positioned inside the stator 122 and rotated by interaction with the stator 122 , and the It may include a rotation shaft 126 coupled to the rotor 124 and rotated together with the rotor 124 .

The compression mechanism 130 may include a fixed scroll 132 that is fixedly installed, and an orbiting scroll 134 that is meshed with the fixed scroll 132 to form a compression chamber and is interlocked with the rotating shaft 126 to pivot. there is. Here, in the present embodiment, the compression mechanism 130 is formed in a so-called scroll type, but is not limited thereto, and may be formed in other types such as a reciprocating type or a vane rotary type.

As shown in FIGS. 2 and 6 to 9 , the inverter 140 includes a substrate 142 on which a plurality of elements 141 necessary for inverter control are mounted and a frame 144 coupled to the substrate 142 . ) may be included.

Here, in the inverter 140 , after the plurality of devices 141 are arranged on the substrate 142 and the frame 144 is assembled to the substrate 142 , for example, a selective soldering method is used. The plurality of elements 141 are formed by soldering, and may be formed to prevent poor soldering and damage to the soldered elements.

Specifically, referring to FIGS. 2 and 6 , the frame 144 has a disk portion C disposed at a position corresponding to the position where the motor 120 is provided, and a protrusion protruding from the disk portion C. (P) may be included.

In addition, the frame 144 includes a support plate 144a facing the substrate 142 , a switching element connected to the substrate 142 (eg, an insulated gate bipolar transistor (IGBT), an intelligent power module (IPM)). etc.) 144d are arranged, a connection bar 144b connecting the support plate 144a and the arrangement plate 144c, and a side plate protruding from the support plate 144a toward the substrate 142 A portion 144e may be included.

The support plate 144a may be formed in both the region of the disk portion C and the region of the protrusion P.

In addition, a cutout 144aa in which the arrangement plate 144c is accommodated may be included in a central portion of the region of the disk portion C of the support plate 144a.

In addition, the support plate 144a includes, for example, a filter accommodating part 144ac in which a filter element 141a such as a capacitor or a condenser is disposed, and the filter accommodating part 144ac is the protrusion of the support plate 144a. It can be arranged in the region of (P).

In addition, the support plate 144a may include a plurality of ribs 144ad for strength improvement, and the plurality of ribs 144ad may be formed in a honeycomb structure to maximize strength improvement.

The arrangement plate 144c may be formed in a plate shape that is spaced apart from the support plate 144a while being accommodated in the cutout 144aa.

In addition, the arrangement plate 144c may include a partition wall 144ca that surrounds the switching element 144d and protrudes in the thickness direction of the switching element 144d. Here, as the arrangement plate 144c is formed in the region of the disk portion C disposed on the motor side in which the suction refrigerant having a low temperature flows, the switching element 144d generates a lot of heat and a cold refrigerant in the motor housing. Heat exchange between the switching elements 144d may be used to smoothly dissipate heat.

The connecting bar 144b may extend from the support plate 144a to the arrangement plate 144c across the space between the support plate 144a and the arrangement plate 144c. That is, one end of the connection bar 144b may be connected to the support plate 144a, and the other end of the connection bar 144b may be connected to the arrangement plate 144c.

In addition, a plurality of connection bars 144b may be formed, and the plurality of connection bars 144b may be disposed along an outer periphery of the arrangement plate 144c.

Here, one of the plurality of connection bars 144b may have one end connected to the filter receiving part 144ac and the other end connected to the arrangement plate 144c.

In addition, the connection bar 144b may be formed of an elastic material so that the arrangement plate 144c can move relatively toward and away from the substrate 142 with respect to the support plate 144a.

When the plurality of elements 141 are soldered to the outer periphery of the side plate portion 144e, a guide pin 212aa of an inverter manufacturing apparatus 200 to be described later for fixing the inverter 140 is inserted, and the plurality of elements are inserted. After soldering 141 , a fastening hole 144g into which a fixture for fastening the inverter 140 to the housing 110 is inserted may be included. Here, the fastening holes 144g are formed in plurality so that the inverter 140 is stably fastened to the housing 110, and the guide pins 212aa, which will be described later, are provided by the inverter 140 to the inverter manufacturing apparatus ( 200) and may be formed in the same number as the plurality of fastening holes 144g to be stably supported.

In addition, the side plate part 144e may include a hook 144f fastened to the substrate 142 , and the hook 144f may be formed by cutting a part of the side plate part 144e. In addition, a plurality of hooks 144f may be formed so that the substrate 142 and the frame 144 are stably assembled, and the plurality of hooks 144f may be arranged along an outer periphery of the base plate.

Meanwhile, the inverter manufacturing apparatus 200 according to the present embodiment includes a first inverter manufacturing apparatus 210 and a first inverter manufacturing apparatus for fixing and dissipating the plurality of elements 141 and the switching element 144d. A second inverter manufacturing device 220 for mounting the 210 may be included.

3 to 8 , the first inverter manufacturing apparatus 210 includes a first dummy plate 212 coupled to the inverter 140 and a first dummy plate 212 coupled to the switching element. A second dummy plate 214 in contact with the 144d and fixing and dissipating the plurality of elements 141 and the switching element 144d may be included.

The first dummy plate 212 includes a first base plate 212a opposite to the substrate 142 side and a first side plate 212b bent from the first base plate 212a and surrounding the outer periphery of the inverter 140 . ) may be included.

The first base plate 212a may include a guide pin 212aa inserted into the fastening hole 144g and an opening 212ab exposing the substrate 142 for soldering.

The first side plate 212b may include a first fixing hole 212ba into which a fastener for coupling the first dummy plate 212 and the second dummy plate 214 is inserted.

In addition, the first side plate 212b may further include a mounting hole 212bb into which a mounting pin 222 of the second inverter manufacturing apparatus 220 is inserted, which will be described later.

The second dummy plate 214 includes a second base plate 214a opposite to the frame 144 side, a second side plate bent from the second base plate 214a and fastened to the first side plate 212b ( 214b), a heat sink 214c installed on the second base plate 214a, and a heat sink 214d that is heat-exchangeable with the heat sink 214c.

The second base plate 214a includes a heat sink installation hole 214aa into which the heat sink 214c is inserted, and a first interference avoidance for avoiding interference with electrical pins for connecting the inverter 140 to a power source. It may include a hole 214ab and a second interference avoiding hole 214ac for avoiding interference with the filter element 141a and the coil.

The second side plate 214b may include a second fixing hole 214ba into which a fastener for coupling the first dummy plate 212 and the second dummy plate 214 is inserted.

The heat sink 214c may be formed of a conductive material, and may be formed in the form of a heat dissipation fin penetrating the second base plate 214a. In addition, the heat sink 214c may include a low-height region and a high-height region as shown in FIG. 7 in order to avoid interference in the manufacturing process.

The heat sink 214d may be formed of a conductive material, and when the second dummy plate 214 is coupled to the first dummy plate 212 , it may be formed to be in contact while pressing the switching element 144d.

Here, the heat sink 214d includes the degree to which the switching element 144d is pressed by the heat sink 214d and the switching element 144d after the inverter 140 is mounted on the housing 110 in the housing. It may be formed so that the degree of pressing by 110 is equal to each other.

On the other hand, the switching element 144d is formed in plurality, the plurality of switching elements 144d are arranged to face each other in double rows, and the heat sink 214d corresponds to the plurality of switching elements 144d. It is formed in the same number as the switching element 144d, and the plurality of heat sinks 214d are arranged to face each other in double rows, and in this case, insulation between the plurality of heat sinks 214d may be required.

Accordingly, the second dummy plate 214 may further include an insulating bracket 214e separating the plurality of heat sinks 214d from each other so that the plurality of heat sinks 214d are not directly connected to each other. .

In addition, the second dummy plate 214 connects the heat sink 214c with the plurality of heat sinks 214d so that the plurality of heat sinks 214d are not indirectly connected to each other through the heat sink 214c. It may further include an insulating paper 214f to insulate. Here, the insulating paper 214f not only performs an insulating function between the plurality of heat sinks 214d and the heat sink 214c, but also removes an air gap between the contact surfaces to remove the plurality of heat sinks 214d. and a function of improving the heat transfer rate between the heat sink 214c and the heat sink 214c.

11 and 12 , the second inverter manufacturing apparatus 220 may be formed in a so-called pallet shape so that a plurality of the inverters 140 are seated on the second inverter manufacturing apparatus 220 and soldered at the same time. there is. That is, the second inverter manufacturing apparatus 220 includes a mounting pin 222 inserted into the mounting hole 212bb, the mounting pin 222 is formed in plurality, and the plurality of mounting pins 222 are provided. Some of the plurality of inverters 140 are inserted into the mounting holes of the first inverter manufacturing apparatus coupled to one of the inverters 140 , and some of the plurality of mounting pins 222 are inserted into the first inverters fastened with another inverter among the plurality of inverters. 1 It may be formed to be inserted into the mounting hole of the inverter manufacturing apparatus.

The inverter manufacturing apparatus 200 according to this configuration may be used for soldering the inverter 140 as shown in FIGS. 9 to 14 . That is, the plurality of elements 141 may be soldered by the inverter manufacturing apparatus 200 according to the inverter manufacturing method shown in FIGS. 9 to 14 .

Specifically, after the plurality of elements 141 are arranged on the substrate 142 and the switching elements 144d are arranged on the frame 144 , the substrate 142 and the frame 144 are assembled. can be

Also, as shown in FIG. 9 , the guide pin 212aa may be inserted into the fastening hole 144g and the inverter 140 may be seated on the first dummy plate 212 .

And, as shown in FIG. 10 , the second dummy plate 214 may be coupled to the first dummy plate 212 .

Here, the switching element 144d is pressed by the heat sink 214d, and the arrangement plate 144c together with the switching element 144d moves toward the substrate 142 with respect to the support plate 144a. can be That is, the connection bar 144b may be deformed, and the relative position of the arrangement plate 144c with respect to the support plate 144a may be changed. Accordingly, the plurality of elements 141 may be pressed against the arrangement plate 144c and fixed at a predetermined position on the substrate 142 . Further, due to the restoring force of the connection bar 144b, the switching element 144d and the heat sink 214d may be closely contacted and thermally connected. In addition, the plurality of elements 141 may be thermally connected to the heat sink 214d through the switching element 144d.

And, as shown in FIG. 11 , an assembly (hereinafter, referred to as an assembly) between the inverter 140 and the first inverter manufacturing apparatus 210 may be seated in the second inverter manufacturing apparatus 220 .

Here, a plurality of the assemblies may be prepared, and the plurality of assemblies may be seated in one of the second inverter manufacturing apparatus 220 .

And, as shown in FIG. 12 , the plurality of elements 141 of the plurality of assemblies may be simultaneously soldered by the soldering apparatus 300 .

Here, the simultaneous soldering may mean that the plurality of elements 141 of the plurality of assemblies are all simultaneously soldered, but as shown in FIG. 12 , the plurality of elements ( 141) may mean soldering together with some of the plurality of elements 141 of another assembly among the plurality of assemblies corresponding thereto.

After soldering is completed, the plurality of assemblies may be removed from the second inverter manufacturing apparatus 220 .

And, as shown in FIG. 13 , each of the assemblies is connected to the tester 400 through the electrical pins to perform performance tests such as whether the plurality of elements 141 and the switching elements 144d operate normally. can receive

And, as shown in FIG. 14 , in each of the assemblies, the second dummy plate 214 is separated from the first dummy plate 212 and the inverter 140 is separated from the first dummy plate 212 . can be withdrawn. That is, the inverter 140 is removed from the inverter manufacturing apparatus 200 , and soldering of the inverter 140 may be completed.

Here, in the motor-driven compressor 100, the inverter manufacturing apparatus 200, and the inverter manufacturing method according to the present embodiment, the inverter 140 of the motor-driven compressor 100 includes the fastening hole 144g, and the fastening The hole 144g is formed to be fastened with the first inverter manufacturing device 210 when the inverter 140 is manufactured, and to be fastened with the housing 110 after the inverter 140 is manufactured, and the first inverter The manufacturing apparatus 210 is coupled to the first dummy plate 212 and the first dummy plate 212 having a guide pin 212aa inserted into the fastening hole 144g and is in contact with the inverter 140 . A second dummy plate 214 is included, and the method of manufacturing the inverter includes the steps of seating the inverter 140 on the first dummy plate 212 , and attaching the second dummy plate 214 to the first dummy plate ( 212) to fix the plurality of elements 141 and connecting the plurality of elements 141 and the switching element 144d to the heat sink 214d of the second dummy plate 214, the plurality of By including the step of soldering the elements 141 of , the plurality of elements 141 are prevented from being separated from a predetermined position, thereby preventing soldering failure.

In addition, as the plurality of elements 141 and the switching element 144d are thermally connected to the heat sink 214d, and the heat sink 214d is thermally connected to the heat sink 214c, in a soldering process Heat applied to the plurality of elements 141 and the switching element 144d may be dissipated through the heat sink 214d and the heat sink 214c. Accordingly, it is possible to prevent the switching element 144d from being damaged by heat due to soldering.

In addition, as the inverter 140 and the first inverter manufacturing apparatus 210 are subjected to a performance test in an assembled state, the plurality of elements 141 and the switching element 144d are operated in the performance test process, The generated heat may be dissipated through the heat sink 214d and the heat sink 214c. Accordingly, it is possible to prevent the inverter 140 from being damaged due to heat generated by the plurality of elements 141 and the switching element 144d (in particular, the switching element 144d with high heat generation) during the performance test.

In addition, the frame 144 of the inverter 140 includes the support plate 144a, the arrangement plate 144c, and the connection bar 144b, and the first inverter manufacturing apparatus 210 includes the heat sink 214d. ) is formed to move the arrangement plate 144c toward the substrate 142 by pressing the switching element 144d, so that the heat sink 214d and the switching element 144d may be in close contact with each other. Accordingly, heat transfer between the heat sink 214d and the switching element 144d may be stably and smoothly performed.

In addition, the degree to which the heat sink 214d presses the switching element 144d is equal to the degree to which the housing 110 presses the switching element 144d when the inverter 140 is mounted on the housing 110 . level, the stress applied to the plurality of elements 141 and the switching element 144d during soldering and after soldering (after the inverter 140 is mounted on the housing 110) the plurality of elements ( 141) and the stress applied to the switching element 144d may be at the same level. Accordingly, it is possible to prevent damage to the soldered portion of the plurality of elements 141 due to a difference in stress applied to the plurality of elements 141 and the switching element 144d.

On the other hand, in the present embodiment, the plurality of inverters 140 are simultaneously soldered so that the plurality of assemblies are seated on one second inverter manufacturing apparatus 220 to improve productivity, but the present invention is not limited thereto. That is, one assembly may be seated and soldered to the second inverter manufacturing apparatus 220 , or the assembly may be directly soldered to the second inverter manufacturing apparatus 220 without being seated in the second inverter manufacturing apparatus 220 .

On the other hand, in the case of the present embodiment, each of the assemblies is subjected to a performance test after being removed from the second inverter manufacturing apparatus 220 , but the present invention is not limited thereto. That is, the plurality of the assemblies may be removed from the second inverter manufacturing apparatus 220 after receiving a performance test in a state in which they are seated in the second inverter manufacturing apparatus 220 .

110: housing
120: motor
130: compression mechanism
140: inverter
142: substrate
144: frame
144a: support plate
144b: connecting bar
144c: array plate
144d: switching element
212: first dummy plate
212a: first base plate
212aa: guide pin
212ab: opening
212b: first side plate
212bb: mounting hole
214: second dummy plate
214a: second base plate
214b: second side plate
214c: heat sink
214d: heat sink
214e: Insulation bracket
214f: insulating paper
222: mounting pin

Claims (19)

housing;
a motor provided inside the housing;
a compression mechanism receiving power from the motor and compressing the refrigerant; and
Including; inverter for controlling the motor;
The inverter includes a substrate on which a plurality of elements are mounted and a frame coupled to the substrate,
The frame includes a support plate, a side plate portion protruding from the support plate toward the substrate, an array plate on which a switching element connected to the substrate is arranged, and a connection bar connecting the support plate and the array plate. According to claim 1,
An electric compressor having a fastening hole fastened to the housing in the side plate portion. According to claim 1,
The support plate and the arrangement plate are formed to be spaced apart from each other, one end of the connecting bar is connected to the support plate, and the other end of the connecting bar is connected to the arrangement plate. 4. The method of claim 3,
The plurality of connection bars are formed, and the plurality of connection bars are disposed along an outer periphery of the arrangement plate. 5. The method of claim 4,
The support plate includes a filter housing in which the filter element 141a is disposed, and one end of the plurality of connection bars is connected to the filter housing of the support plate and the other end is connected to the arrangement plate. 4. The method of claim 3,
The connection bar is formed such that the arrangement plate is relatively movable in a direction away from and closer to the substrate with respect to the support plate. According to claim 1,
The arrangement plate includes a partition wall that surrounds the switching element and protrudes in a thickness direction of the switching element. According to claim 1,
The switching element is formed in plurality, and the plurality of switching elements are arranged to face each other in double rows. a first dummy plate fixed to the frame of an inverter having a substrate on which a plurality of elements of the electric compressor are mounted and a frame on which switching elements are disposed; and
and a second dummy plate fastened to the first dummy plate and in contact with the switching element, the second dummy plate fixing and dissipating the switching element and the plurality of elements. 10. The method of claim 9,
The second dummy plate includes a heat sink,
The heat sink is formed in contact with the switching element when the second dummy plate is fastened to the first dummy plate. 11. The method of claim 10,
The frame includes a support plate, an array plate on which the switching elements are arranged, and a connection bar connecting the support plate and the array plate,
When the second dummy plate is fastened to the first dummy plate, the heat sink changes the relative position of the arrangement plate with respect to the support plate by pressing the switching element and is formed to be in close contact with the switching element by the restoring force of the connection bar Inverter manufacturing equipment. 10. The method of claim 9,
The frame includes a fastening hole that is fastened to the housing,
The first dummy plate includes a first base plate opposite to the substrate side and a first side plate bent from the first base plate and surrounding an outer periphery of the inverter,
The first base plate includes a guide pin inserted into the fastening hole and an opening exposing the substrate for soldering,
The first side plate includes a fixing hole into which a fastener for fastening with the second dummy plate is inserted. 13. The method of claim 12,
The first side plate further comprises a mounting hole into which a mounting pin for simultaneously soldering a plurality of the inverters is inserted. 13. The method of claim 12,
The second dummy plate,
a second base plate opposite to the frame side;
a second side plate bent from the second base plate and fastened to the first side plate; and
a heat sink installed on the second base plate and heat-exchangeable with the heat dissipation fins; Inverter manufacturing apparatus further comprising a. 11. The method of claim 10,
The switching element is formed in plurality,
The heat sink is formed in the same number as the switching element,
The second dummy plate comprises an insulating bracket for insulating the plurality of heat sinks from each other. 15. The method of claim 14,
The second dummy plate comprises an insulating paper for insulating the heat sink from the plurality of heat sinks. A guide pin of the inverter manufacturing apparatus having a first dummy plate fixed to the inverter of the motor-driven compressor and a second dummy plate coupled to the first dummy plate and contacting the inverter for fixing and dissipating the elements of the inverter is attached to the inverter. a first preparation step of inserting the inverter into the fastening hole of the frame and seating the inverter on the first dummy plate;
a second preparation step of fixing the device of the inverter by fastening the second dummy plate to the first dummy plate, and connecting the device to the heat sink of the second dummy plate;
a soldering step of soldering the element; and
Inverter manufacturing method comprising a; withdrawing the inverter from the inverter manufacturing apparatus. 18. The method of claim 17,
Between the soldering step and the withdrawing step, the inverter manufacturing method further comprising a test step of inspecting whether the device is operating normally. 18. The method of claim 17,
A third preparation step of seating the assembly between the inverter and the inverter manufacturing device on a pallet between the second preparation step and the soldering step; further comprising,
In the soldering step, when the plurality of the assemblies are seated on the pallet, the inverter manufacturing method, characterized in that simultaneously soldering the elements of the plurality of the assemblies seated on the pallet.

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