KR20170135491A - Power Conversion Device of Energy Storage System - Google Patents

Abstract

The power conversion apparatus according to the present invention may include a front case forming a front surface and a rear case coupled to the front case to form an inner space. The rear case may include an intake portion for introducing outside air, an exhaust hole for exhausting the outside air introduced into the intake portion, and a fan for forcedly flowing outside air flowing through the intake portion and the exhaust hole. Further, a heat sink may be coupled to the rear case. Further, a duct cover covering the heat sink may be included. The internal space may include an internal heat-radiating flow path from the intake unit toward the exhaust port, and an external heat-radiating flow path from the exhaust port toward the duct cover.
According to the present invention, the heat radiation efficiency can be improved by forming the internal heat radiation passage and the external heat radiation passage for cooling the power conversion device. Therefore, the service life of the parts accommodated therein can be improved. Further, since the hot component is disposed adjacent to the exhaust port of the power conversion apparatus, thermal interference between the components can be minimized. Further, since the hooks fixed to the rear surface of the power conversion apparatus are detachably provided, the installation work can be made convenient.

Description

[0001] The present invention relates to a power conversion device of an energy storage system,

The present invention relates to a power conversion device of an energy storage system.

The energy storage system stores the electric power generated from a power plant and supplied to the electric power system or the electric power generated from renewable energy such as solar, wind, and water power into a storage system including a battery or the like, It is a system that improves the energy efficiency by using it selectively and efficiently.

Using energy storage systems can equalize electrical loads with large time and seasonal variations. This can improve the overall load factor. In addition, the power generation cost can be lowered. In addition, it is possible to reduce the investment cost and operating cost required for the expansion of electric power facilities. In addition, it can lower the electricity bill and save energy.

These energy storage systems are installed in connection with power systems, generators, transmission and distribution, and customers, and are equipped with frequency regulation, generator output stabilization using peak energy, peak shaving, load leveling, And emergency power supply.

Energy storage systems are divided into physical energy storage and chemical energy storage depending on the storage method. Physical energy storage includes pumped storage, compressed air storage, and flywheel. Chemical storage includes lithium ion batteries, lead acid batteries, and Nas batteries.

Thus, the energy storage system discharges the charged electric power to supply electric power when necessary. This allows the energy storage system to supply power flexibly.

On the other hand, an apparatus for constructing an energy storage system includes a battery module for storing energy. A power conversion device for converting the battery module into electric power suitable for charging with electric power supplied from the outside or converting the electric power generated from the energy stored in the battery module to electric power consumed by a customer is included.

For example, such a power conversion apparatus converts electric power of a direct current (DC) power type generated by absorbing light from the sun into electric energy of an AC power type used in a consumer and supplies electricity to a consumer. That is, it performs the function of converting the characteristics of electricity according to each demand.

In addition, since the power conversion device emits heat from internal devices and devices in the process of converting direct-current (DC) type electric energy into alternating current (AC) type electric energy, heat dissipation of the power conversion device is an important issue do.

For example, Korean Patent Laid-Open Publication No. 10-2013-0116742, " Photovoltaic power conversion device " is disclosed.

According to the prior art, a structure is disclosed in which a reactor is brought into contact with a heat sink to dissipate heat in a power conversion apparatus, and a thermal grease is interposed between the reactor and the heat sink.

However, even with the above-described conventional techniques, there is a limit to obtaining sufficient heat radiation. In addition, there is a problem in that the internal air of the power conversion apparatus is heated.

1 and 2 of Korean Patent Laid-Open Publication No. 10-2013-0116742, " Solar Power Conversion Device ".

The present invention proposes a power conversion device capable of improving heat radiation efficiency of a power conversion device.

The present invention proposes a power conversion apparatus that can facilitate the installation work of the power conversion apparatus.

The power conversion apparatus according to the present invention may include a front case forming a front surface and a rear case coupled to the front case to form an inner space.

The rear case may include an intake portion for introducing outside air, an exhaust hole for exhausting the outside air introduced into the intake portion, and a fan for forcedly flowing outside air flowing through the intake portion and the exhaust hole.

Further, a heat sink may be coupled to the rear case. Further, a duct cover covering the heat sink may be included.

In addition, the rear case may include a hook that supports the rear case and is detachably provided.

The internal space may include an internal heat-radiating flow path from the intake unit toward the exhaust port, and an external heat-radiating flow path from the exhaust port toward the duct cover.

Also, a printed circuit board, a reactor, and a power semiconductor may be provided in the inner space.

Further, the power semiconductor may be in contact with the heat sink. The reactor may be arranged adjacent to the exhaust port.

The inner space may be divided into a first inner space and a second inner space by the printed circuit board. The internal heat-radiating flow path may include a first internal heat-radiating flow path that flows in the first internal space, and a second internal heat-radiating flow path that flows in the second internal space.

The external heat-radiating flow path may include a first external heat-radiating flow path through which the external air flowing in the internal heat-radiating flow path flows, and a second external heat-radiating flow path through which external air flows by natural convection.

According to the present invention, the heat radiation efficiency can be improved by forming the internal heat radiation passage and the external heat radiation passage for cooling the power conversion device. Therefore, the service life of the parts accommodated therein can be improved.

According to the present invention, since the high-temperature component is installed adjacent to the exhaust port of the power conversion apparatus, thermal interference between the components can be minimized.

According to the present invention, the intake portion into which the outside air flowing in the heat dissipation path flows is provided inside the depression of the power conversion device, so that the inflow of the foreign matter can be minimized.

According to the present invention, since the hooks fixed to the rear surface of the power conversion apparatus are detachably provided, the installation work can be made convenient.

1 is a front perspective view of a power conversion apparatus according to the present embodiment.
2 is a rear perspective view of the power conversion apparatus according to the present embodiment.
3 is an exploded view of the power conversion apparatus according to the present embodiment.
4 is a front view showing an internal view of the power conversion apparatus according to the present embodiment.
5 is a cross-sectional view showing an internal view of the power conversion apparatus according to the present embodiment.
6 is a partially exploded view showing the back surface of the power conversion apparatus according to the present embodiment in an exploded manner.
7 is a view showing the flow of external air flowing through the internal heat-radiating passage according to the present embodiment.
8 is a view showing the flow of external air flowing through the internal heat-radiating flow path and the external heat-radiating flow path according to the present embodiment.
9 is a view showing the flow of external air flowing through the external heat-radiating passage according to the present embodiment.
10 is a view showing a hanging portion of the power conversion apparatus according to the present embodiment.
Fig. 11 is an exploded view explaining the hanging portion of the power conversion apparatus according to the present embodiment.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims, It will be easily understood that the present invention is not limited thereto.

The drawings attached to the following embodiments are not intended to limit the scope of the present invention to the extent that they are easily understood without departing from the spirit of the invention. And can be expressed in an exaggerated manner.

1 is a front perspective view of a power conversion apparatus according to the present embodiment.

Referring to FIG. 1, the power conversion apparatus 1 according to the present embodiment may include a front case 10 and a rear case 20. The front case 10 and the rear case 20 may be coupled to each other to form a body. The front case 10 and the rear case 20 are coupled to each other and have an internal space in which a plurality of parts can be disposed.

The front case 10 may include an upper case 11 and a lower case 12. The upper case 11 and the lower case 12 may be detachably coupled to each other. When the lower case 12 is separated from the upper case 11, a part of the internal space of the power conversion device 1 may be exposed to the outside. According to this configuration, it is possible to easily connect the battery module, the power system, the power generation module, and the like, which are connected to the power conversion device 1 through the transmission / distribution line.

The upper case 11 may be provided with a touch display unit 15. The touch display unit 15 may be mounted on the touch display installation hole 151 where a part of the front surface of the upper case 11 is opened. The touch display unit 15 may receive an operation signal from a user or indicate an operation state of the power conversion apparatus 1. [ The touch display unit 15 may provide information to the user according to the operating state of the power conversion apparatus 1. [

In addition to the touch display unit 15, the upper case 11 may be provided with an operation state of the power conversion apparatus 1 or a state of a battery module, a power system, a power generation module, etc. connected to the power conversion apparatus 1 The display unit 18 may further be included. For example, the display unit 18 may be provided with an LED. The display unit 18 may be provided in a plurality of units to indicate states of a battery module, a power system, a power generation module, and the like. In addition, the display unit 18 may emit various lights such as green, red, blue, and blinking to indicate the states of the battery module, the power system, and the power generation module to the user. Without being limited to this event, the display unit 18 may include any means capable of providing information to the user such as tactile, olfactory, auditory, and the like.

The front case 10 may have a case extension 13 extending in a direction toward the rear case 20. In other words, the case extension 13 may extend from the upper case 11 and the lower case 12 toward the rear case 20, respectively. At this time, it can be understood that the front case 10 is "forward" and the rear case 20 is "rear". That is, the direction toward the rear case 20 can be understood as a direction from "front" to "rearward".

In detail, the case extension part 13 may be formed to extend from each end toward the rear case 20. The case extension 13 may extend rearward at each end, that is, at the upper and lower ends of the upper case 11, and at both side ends and lower ends of the lower case 12, respectively. That is, by forming the case extension part 13, the front case 10 can be formed so as to be recessed in the direction from the rear to the front.

The case extension 13 is formed on the upper end of the upper case 11 and the upper end of the lower case 12 on the side where the upper case 11 and the lower case 12 are coupled to each other, May not be formed. The case extension 13 may be formed at a lower end of the upper case 11 and at an upper end of the lower case 12 but may extend rearward from each end of the front case 10 And can be shorter than the case extension portion 13. [ It is not limited to this idea.

On the other hand, the case extension part 13 extending from the upper side of the upper case 11 may be provided with an upper side cover part 14 extending rearward and formed to be inclined downward. The upper cover 14 may cover the upper surface of the rear case 20 when the front case 10 and the rear case 20 are engaged. That is, when the upper cover 14 covers the rear case 20, the front case 10 and the rear case 20 can be tightly coupled. In addition, the upper cover 14 is formed so as to be inclined downward, thereby blocking water droplets that may be injected from the upper surface of the power conversion apparatus 1. [

2 is a rear perspective view of the power conversion apparatus according to the present embodiment.

Referring to FIG. 2, the rear case 20 may be formed with a case bend 21 extending in a direction toward the front case 10. The case bend portion 21 may be bent at each end of the rear case 20. In addition, the case bend portion 21 may be formed to be inclined at a predetermined angle from the end of the rear case 20. In other words, the case bend section 21 may be formed to be inclined forward from the rear. For example, the front case 10 may be formed larger than the rear case 20. The case bend portion 21 may be formed to be inclined upward from the rear case 20 toward the front case 10. It is not limited to this idea.

The case bend portion 21 may be formed with a guide portion 22 (see FIG. 3) that can be engaged with the case extension portion 13 of the front case 10. The guide portion 22 may extend from the case bend portion 21. The guide portion 22 may be coupled to the inside of the case extension portion 13. Therefore, the front case 10 and the rear case 20 can be tightly coupled.

According to this configuration, the rear case 20 can be coupled to the inside of the front case 10. Therefore, the rear case 20 and water droplets that may flow into the front case 10 may be blocked by the front case 10. [

Meanwhile, a hooking portion 28 for fixing the rear case 20 to a wall, a supporting structure, or the like may be provided. The hooking portion 28 can be fixed to a wall, a support structure, or the like through a fastening member.

In detail, the hooking part 28 may include a first hooking part 281, a second hooking part 282 and a third hooking part 283. The hooks 28 may be detachably attached to each other. The first hooking part 281 and the third hooking part 283 may be provided in a shape such that at least a part thereof is bent. For example, the first hooking portion 281 and the third hooking portion 283 may be partially bent. The second hooking portion 282 may be formed long in the vertical direction so as to connect the first hooking portion 281 and the third hooking portion 283. For example, the second hooking portion 282 may be formed into a long bar shape in the vertical direction. It is not limited to this idea. The hooking portion 28 will be described in detail with reference to FIGS. 10 and 11. FIG.

The rear case 20 may be provided with a fixing part 23 to be engaged with the hooking part 28. The fixing portion 23 may extend rearward from the rear case 20. Further, the fixing portion 23 can be coupled to the rear case 20 by a fastening member. It is not limited to this idea.

The fixing part 23 may include a first fixing part 231 provided at an upper portion of the rear case 20 and a second fixing part 232 provided at a lower portion of the rear case 20. The first fixing part 231 may be mounted with the first hooking part 281. The third fixing part (283) may be coupled to the second fixing part (232). It is not limited to this idea.

That is, after fixing the hooking portion 28 to a wall, a supporting structure or the like, the first fixing portion 231 is mounted on the first hooking portion 281 and the second fixing portion 231 is mounted on the third hooking portion 283, The rear case 20 can be fixed by mounting the fixing portion 232 thereon.

According to this structure, the user can securely fix the rear case 20 by fixing the hooking part 28 to the hooking part 28 after fixing the fixing part 23 to the hooking part 28.

A heat sink 30 may be provided on the rear surface of the rear case 20. The heat sink 30 may be coupled to the rear surface of the rear case 20 through a fastening member.

A duct cover (40) covering the heat sink (30) may be provided on the rear surface of the rear case (20). The duct cover 40 may have an internal space to cover the heat sink 30. The duct cover 40 may be coupled to the rear surface of the rear case 20 through a fastening member. In other words, the duct cover 40 may be fixed to the rear surface of the rear case 20 in a state where the heat sink 30 is disposed in the inner space of the duct cover 40.

The duct cover 40 may include a first duct cover 41 covering the heat sink 30 and a second duct cover 42 covering a part of the rear case 20. [ The first duct cover 41 may be fixed to the rear case 20 while covering the heat sink 30. The first duct cover 41 may be partially opened. In other words, the duct cover 40 can shield a part of the heat sink 30. [ The second duct cover 42 may cover an exhaust port 25 (see FIG. 3) of the rear case 20, which will be described later. The first duct cover (41) and the second duct cover (42) can communicate with each other.

Meanwhile, a part of the hooking portion 28 may cover the duct cover 40. In other words, the second hooking portion 282 of the hooking portion 28 can be disposed across the duct cover 40.

A lower portion of the rear case 20 may be provided with a depression 26 recessed in a direction from the lower portion to the upper portion of the rear case 20. [ In addition, the depressed portion 26 may be recessed forward from the rear. The depressed portion 26 may be provided with a connection portion (not shown) for connecting a cable, an electric wire or the like connected to the power conversion device 1. The connection portion (not shown) may be disposed in a recessed space generated by providing the depression 26. The connector (not shown) may include a connector, a wiring hole, and the like. The connector, the wiring hole, and the like may be formed in a direction that protrudes downward from the depressed portion 26. The connector, the wiring hole, and the like may be provided with means for waterproofing. For example, a waterproof cap, a waterproof film, and the like may be included. According to this, it is possible to prevent water droplets from penetrating into the connector, the wiring hole, and the like from the periphery of the electric power conversion device 1. It is not limited to this idea.

3 is an exploded view of the power conversion apparatus according to the present embodiment.

Referring to FIG. 3, the power conversion apparatus 1 according to the present invention may be formed by combining the rear case 20 and the front case 10. A plurality of electric components may be disposed in the inner space formed by coupling the rear case 20 and the front case 10. A heat sink 30 and a duct cover 40 may be mounted on the rear case 20. At this time, an opening 24 may be formed between the rear case 20 and the heat sink 30.

In detail, the opening 24 may include a first opening 241 and a second opening 242. The first opening 241 and the second opening 242 may be spaced apart from each other. The opening 24 can communicate with the external space of the power conversion device 1. The opening 24 may be shielded by the heat sink 30.

More specifically, the heat sink 30 may include a first heat sink 31 and a second heat sink 32. The first heat sink 31 may include a first heat sink 311 (see FIG. 8) and a first heat sink fin 312 (see FIG. 8). The first radiating fins 312 may extend in the longitudinal direction of the first radiating plate 311 and may be provided in a plurality of ways. The second heat sink 32 may include a second heat sink (not shown) and a second heat sink fin (not shown). The second radiating fins (not shown) may extend in the longitudinal direction of the second radiating plate (not shown) to provide a plurality of radiating fins.

The first heat radiating plate 311 of the first heat sink 31 may shield the first opening 241. The second heat sink (not shown) of the second heat sink 32 may shield the second opening 242. That is, the first heat sink 31 may be formed larger than the first opening 241. The second heat sink 32 may be formed larger than the second opening 242. It is not limited to this idea.

According to this, a part of a plurality of electric components disposed in the internal space of the power conversion apparatus 1 can be brought into contact with the heat sink 30. [ Therefore, heat generated in the one part can be dissipated by conduction. Also, since the first opening 241 and the second opening 242 are provided apart from each other, it is possible to prevent the heat generated due to the arrangement of the plurality of electrical components adjacent to each other.

On the other hand, a duct cover (40) capable of covering the heat sink (30) may be provided on the rear surface of the rear case (20). The duct cover (40) may include a first duct cover (41) and a second duct cover (42). The first duct cover 41 may cover the first heat sink 31 and the second heat sink 32. The second duct cover 42 may cover the exhaust port 25 and the fan 80. It is not limited to this idea. The duct cover 40 will be described in detail with reference to FIG.

Hereinafter, a plurality of electric components disposed in the inner space will be described in detail.

A printed circuit board 60, a reactor 70, a reactor 70, and a power semiconductor 90 may be provided in an inner space formed by coupling the rear case 20 and the front case 10.

The printed circuit board 60, the reactor 70, and the power semiconductor 90 can convert the power type transmitted from the outside. In this process, the reactor 70 and the power semiconductor 90 emit heat at a high temperature. The heat generated in the reactor 70 and the power semiconductor 90 shortens the service life of the power inverter 1 and causes malfunction.

Accordingly, in order to efficiently discharge the heat generated from the reactor 70 and the power semiconductor 90, the rear case 20 is provided with an exhaust port 25, an intake port 29 and a fan 80 . In other words, it is possible to form forced convection inside the power conversion apparatus 1, and to release the heat generated in the inside to the outside.

In detail, the exhaust port 25 may be provided above the first opening 241 and the second opening 242. That is, the exhaust port 25 may be disposed above the rear case 20. The fan (80) can be mounted on the exhaust port (25).

The suction unit 29 may be provided in the depression 26 provided in the lower portion of the rear case 20. [ The intake unit 29 may be provided on one side of the depression 26. For example, the intake unit 29 may be provided in a direction parallel to the rear case 20.

Specifically, the depressed portion 26 may be provided with an intake opening 291. The intake opening 291 may be provided with one side of the depression 26 being open. The intake openings 291 may be spaced apart from each other and disposed in a plurality of openings. An opening cover 292 may be provided to minimize the entry of foreign matter into the intake opening 291.

A portion of the opening cover 292 may be mounted to the depression 26. The other portion of the opening cover 292 may be provided in the form of a net-like net. The other portion of the opening cover 292 may be formed in a blind shape in which a plurality of plates are inclined at regular intervals. The other portion of the opening cover 292 may be positioned on the intake opening 291. The present invention is not limited to such a configuration.

According to such a configuration, when a part of the opening cover 292 is mounted on the depression 26, outside air passes through the intake opening 291 through the other portion of the opening cover 292 can do. At this time, a foreign matter or the like that can be introduced from the outside can be caught by the mesh or the blind shape formed at the other portion of the opening cover 292.

4 is a front view showing an internal view of the power conversion apparatus according to the present embodiment.

Referring to FIG. 4, a printed circuit board (PCB) 60, a reactor 70, and a power semiconductor 90 may be disposed in the power conversion apparatus 1.

The printed circuit board 60 may include an input / output board 61, a power board 61 ', a control board 62, and a PMS board 63. A part of the printed circuit board 60 may be mounted on the rear case 20 of the power conversion apparatus 1. [ Further, another part of the printed circuit board 60 may be mounted on the front case 10 of the power conversion apparatus 1. That is, the printed circuit boards 60 may be spaced apart from each other in the power conversion apparatus 1. [ It is not limited to this idea. The printed circuit board 60 will be described with reference to FIG.

The power semiconductor 90 may be mounted on the printed circuit board 60. The power semiconductor 90 may be mounted directly on the heat sink 30 mounted on the rear surface of the rear case 20. At this time, the printed circuit board 60 may have a hole through which the power semiconductor 90 can pass. That is, the power semiconductor 90 may be mounted through the printed circuit board 60. It is not limited to this idea.

The power semiconductor 90 may include an insulated gate bipolar transistor (IGBT) 91 and a field effect transistor (FET) 92. The power semiconductor 90 may be provided to control the voltage of the power applied to the power conversion device 1. [ The power semiconductor 90 generates a relatively large amount of heat. Therefore, the power semiconductor 90 can be brought into contact with the heat sink 30 to dissipate heat. The power semiconductor 90 according to the present embodiment is described as being provided with one IGBT 91 and two FETs 92. However, the number of the IGBT 91 and the FET 92 is not limited.

The reactor 70 may include a PV reactor 71, an AC reactor 73, and a reactor battery 72. The reactor 70 may be disposed adjacent to the exhaust port 25 formed in the rear case 20. That is, the reactor 70 may be disposed above the rear case 20. The reactor 70 is not limited to the PV reactor 71, the reactor battery 72, and the AC reactor 73, and may be variously replaced with a DC reactor, a series reactor, a parallel reactor, or the like .

The PV reactor 71 may include a first PV reactor 71 'and a second PV reactor 71' '. The PV reactor 71 can perform a function of absorbing a surge voltage or the like against a sudden change in current generated in the power generation module PV. For example, the power generation module may include solar power generation. The first PV reactor 71 'may be connected to a first power generation module (not shown) and operated. The second PV reactor 71 '' may be connected to a second power generation module (not shown) and operated. In other words, the PV reactor 71 can be changed according to the number of the power generation modules connected to the power conversion apparatus 1. It is not limited to this idea. In this embodiment, a plurality of PV reactors 71 are provided.

The AC reactor 73 may include a first AC reactor 73 'and a second AC reactor 73' '. The AC reactor 73 can perform a function of stabilizing the abrupt change of the current applied from the AC power source. For example, it is possible to stabilize a sudden change in power generated in the process of converting the DC power generated from the power generation module into the AC power. The first AC reactor 73 'and the second AC reactor 73' 'may be operated in conjunction with each other. Further, the first AC reactor 73 'and the second AC reactor 73' 'may be operated respectively. It is not limited to this idea. However, the AC reactor 73 of either the first AC reactor 73 'or the second AC reactor 73' 'may be disposed adjacent to the exhaust port 25. At this time, the AC reactor 73 disposed adjacent to the exhaust port 25 may have an average heat generation temperature higher than that of the other AC reactors 73. That is, since the AC reactor 73 having a relatively high heat generation temperature is disposed adjacent to the exhaust port 25, the heat radiation efficiency can be improved.

The battery reactor 70 may perform a function of stabilizing a sudden change in current applied from a battery module (not shown) connected to the power conversion apparatus 1. [ The battery reactor 70 may be provided in one or more battery modules (not shown) connected to the power conversion device 1 in consideration of voltage or current. It is not limited to this idea. However, in this embodiment, it is assumed that one battery reactor 70 is provided.

In the present embodiment, the battery reactor 70 emits a relatively larger amount of heat than the PV reactor 71. Therefore, the battery reactor 70 may be disposed adjacent to the exhaust port 25. Therefore, the heat generated in the battery reactor 70 can be easily discharged to the exhaust port 25.

That is, since the plurality of reactors 70 are disposed adjacent to the exhaust port 25, the heat generated in the reactor 70 is discharged to the exhaust port 25 through forced convection by the fan 80 .

Hereinafter, the inside view will be described in more detail based on the cross section of the power conversion apparatus 1. FIG.

5 is a cross-sectional view showing an internal view of the power conversion apparatus according to the present embodiment.

Referring to FIG. 5, the input / output board 61 may be mounted on the rear case 20. The input / output board (61) may be disposed below the rear case (20). The input / output board 61 is connected to a cable or the like connected from the outside to transmit / receive an input / output signal. That is, the input / output board 61 is disposed adjacent to the depressed portion 26 of the rear case 20, so that the input / output board 61 can be easily connected to a cable or the like connected from the outside.

The power board 61 'may be disposed above the input / output board 61. The power board 61 'may be connected to a power semiconductor 90 to be described later. A hole through which the power semiconductor 90 can be inserted may be formed in the power board 61 '. In addition, an opening 24 may be disposed in the rear of the power board 61 ', that is, the rear case 20. Accordingly, the heat generated from the power board 61 'can be conducted to the outside by the heat sink 30 mounted on the opening 24. [0064]

The power board 61 'and the input / output board 61 may be coupled to the rear case 20 through a fastening member. At this time, the power board 61 'and the input / output board 61 may be disposed in parallel with the rear case 20. It is not limited to this idea.

The control board 62 may be spaced forward from the power board 61 'and the input / output board 61. The control board 62 may be fastened to the power board 61 'and the input / output board 61 through a fastening member. That is, the control board 62 can partition a portion of the internal space. The control board 62 is spaced forward from the power board 61 and the input and output board 61 so that the control board 62 and the power board 61 ' 61 can be minimized. That is, the control signal generated from the control board 62 can be transmitted to the input / output board 61 and the power board 61 'more quickly.

The PMS board 63 may be disposed on the front case 10. The PMS board 63 may transmit a control signal to the display touch unit 15 mounted on the front case 10. The PMS board 63 may be positioned behind the display touch unit 15. At this time, a PMS cover unit 17 for fixing the PMS board 63 to the rear of the display touch unit 15 may be provided. In other words, the PMS board 63 may be fixed to the rear of the display touch unit 15 in a state of being covered with the PMS cover unit 17. The PMS board 63 may be connected to the control board 62. At this time, the length of a wire connecting the PMS board 63 and the control board 62 is minimized, and the signal can be transmitted more quickly.

As a result, the fan 80 forcibly flows in the power conversion apparatus 1 according to the present embodiment so that the air introduced from the intake unit 29 can flow toward the exhaust port 25 . The forced convection generated by the fan 80 can be moved in a direction from the lower part of the power conversion device 1 toward the upper part. At this time, external air may flow into the space partitioned by the control board 62, respectively. That is, each of the spaces partitioned by the control board 62 may be referred to as a "first inner space" and a "second inner space". In addition, the control board 62 may be referred to as a " partition "

Therefore, efficient heat radiation of the printed circuit board 60 can be performed through the external air. The air cooled in the printed circuit board 60 may be discharged to the rear of the rear case 20 through the exhaust port 25 after the reactor 70 is cooled.

The printed circuit board 60, the reactor 70, and the power semiconductor 90 disposed inside the power conversion apparatus 1 can be arranged by the heat generated in each of them. In detail, the forced convection generated by the fan 80 flows from the lower part to the upper part of the power conversion device 1, so that the lower part of the power conversion device 1 is provided with the printed circuit board 60 ) May be provided. According to this configuration, the outside air introduced from the lower portion of the power conversion apparatus 1 flows in the direction toward the upper portion of the power conversion apparatus 1, and the temperature of the outside air gradually increases, Lt; / RTI > That is, it is possible to minimize the thermal interference of the electronic components disposed inside the power conversion device 1. [

The outside air that has cooled inside the power conversion apparatus 1 can be discharged to the outside of the power conversion apparatus 1 through the exhaust port 25. [ The discharged outside air can flow along the duct cover 40 mounted on the rear surface of the rear case 20.

6 is a partially exploded view showing the back surface of the power conversion apparatus according to the present embodiment in an exploded manner.

Referring to FIG. 6, a heat sink 30 may be mounted on the rear surface of the power conversion apparatus 1. The heat sink 30 is provided with a first heat sink 31 for shielding the first opening 241 of the rear case 20 and a second heat shield 31 for shielding the second opening 242 of the rear case 20, A sink 32 may be provided. A duct cover 40 may be provided to shield the heat sink 30 and be mounted on the rear surface of the rear case 20. [ The duct cover 40 includes a first duct cover 41 covering the first heat sink 31 and the second heat sink 32 and a second duct cover 41 covering the exhaust port 25 of the rear case 20, The second duct cover 42 may be included. The first duct cover (41) and the second duct cover (42) can communicate with each other.

The first duct cover 41 may be formed as a polygon having a part opened to cover the heat sink 30. For example, the cross section of the first duct cover 41 as viewed from above may be formed in a " C " shape. The heat sink 30 may be inserted into the open portion of the first duct cover 41.

The second duct cover 42 may be provided as a polygon having one side opened and an inclined surface. One side of the second duct cover (42) may be connected to the first duct cover (41). For example, the second duct cover 42 may be provided in the shape of a triangle or a portion of which the cross-section viewed from the side is curved. It is not limited to this idea. The second duct cover 42 may be provided to be smaller than the width of the heat sink 30. That is, the second duct cover 42 can transmit the outside air discharged from the air outlet 25 to a part of the first heat sink 31. At this time, the outside air discharged from the second duct cover 42 may be transmitted to the first heat sink 31.

According to such a configuration, the power conversion apparatus 1 can simultaneously perform heat radiation by forced convection and heat radiation by natural convection. The external air discharged through the exhaust port 25 flows through the second duct cover 42 and a part of the first duct cover 41 to be discharged to the outside . At this time, the outside air flowing through the second duct cover 42 and a part of the first duct cover 41 can flow through the first heat sink 31. External air around the power conversion device 1 naturally flows through the second heat sink 32, so that the heat can be dissipated by natural convection.

According to this, the first heat sink 31, which is discharged by the forced convection, and the second heat sink 32, which is discharged by natural convection, may generate a temperature difference with each other. The first heat sink 31 and the second heat sink 32 can exchange heat with each other due to the temperature difference generated in the first heat sink 31 and the second heat sink 32. [ Therefore, the heat radiation efficiency of the heat sink 30 can be improved.

As a result, the power conversion apparatus 1 according to the present embodiment includes an internal heat-radiating flow path which is introduced into the intake unit 29 and discharged to the exhaust port 25 to radiate heat in the power conversion apparatus 1, And a first external heat dissipating flow path that flows into the first duct cover 41 and is discharged to the second duct cover 42 to radiate heat to the first heat sink 31. At this time, the external air flowing through the internal heat-radiating flow path and the first external heat-radiating flow path can flow through the forced convection by the fan (80). In addition, the internal heat-radiating flow path is provided with a first internal heat-radiating flow path that flows into each of the spaces partitioned and provided by the control board 62 disposed inside the power conversion apparatus 1, .

In addition to the internal heat-radiating flow path and the first external heat-radiating flow path, a second external heat-radiating flow path for radiating heat only to the second heat sink 32 may be further provided. At this time, the first external heat-radiating flow path and the second external heat-radiating flow path may be referred to as external heat radiation flow paths.

7 is a view showing the flow of external air flowing through the internal heat-radiating passage according to the present embodiment.

Referring to FIG. 7, the internal space of the power conversion device 1 may be formed with an internal heat-dissipating channel A. In detail, the outside air introduced through the intake unit 29 can flow toward the exhaust port 25. [ At this time, the flow of the outside air from the intake unit 29 toward the exhaust port 25 may be generated by the fan 80. [ Accordingly, the PV reactor 71, the battery reactor 70, and the AC reactor 73 are disposed adjacent to the exhaust port 25, so that the heat radiation efficiency can be improved.

8 is a view showing the flow of external air flowing through the internal heat-radiating flow path and the external heat-radiating flow path according to the present embodiment.

Referring to FIG. 8, the external air introduced from the intake unit 29 may flow through the internal space of the power conversion apparatus 1. At this time, the flow path of the external air to be formed may be referred to as the internal heat radiation flow path (A). External air introduced into the power conversion apparatus 1 is branched by the control board 62 to the first internal heat radiation flow path A-1 and the second internal heat radiation flow path A-2, can do. The first internal radiating flow path A-1 may flow in a space between the control board 62 and the front case 10. The second internal heat dissipating channel A-2 may flow in a space between the control board 62 and the rear case 20. [ Therefore, more efficient heat dissipation can be achieved by the first internal radiating flow path (A-1) and the second internal radiating flow path (A-2).

External air flowing through the first internal radiating flow path A-1 and the second internal radiating flow path A-2 may flow through the exhaust port 25 to the duct cover 40. At this time, the flow path of the outside air formed in the duct cover 40 may be referred to as the first outside radiating flow path (B-1). External air flowing through the first external radiating passage (B-1) flows through the heat sink (30) and can be discharged to the outside. In this process, heat dissipation of the heat sink 30 can be achieved.

As a result, the outside air flowing inside the power conversion apparatus 1 can flow in the direction from the lower part to the upper part of the power conversion apparatus 1. The outside air may be exhausted to the outside through the exhaust port 25. Thereafter, the outside air may flow along the duct cover 40 in a direction from the upper portion to the lower portion of the power conversion apparatus 1. [

According to such a configuration, the heat radiation efficiency can be improved by cooling the inner space of the power inverter 1 and the heat sink 30 simultaneously through the outside air.

Further, by guiding the external air heated in the process of cooling the power conversion apparatus 1 in the direction toward the lower portion of the power conversion apparatus 1, the temperature of the power conversion apparatus 1 Can be prevented from rising.

9 is a view showing the flow of external air flowing through the external heat-radiating passage according to the present embodiment.

Referring to FIG. 9, external air passing through the exhaust port 25 can flow through the first external heat-radiating flow path B-1. External air flowing through the first external heat-radiating flow path (B-1) can flow in a direction from the top to the bottom. The outside air flowing in the direction from the upper part to the lower part can cool the first heat sink 31.

On the other hand, the second heat sink 32 may be disposed on the rear surface of the power conversion apparatus 1. The second heat sink 32 may be partitioned from the first heat sink 31 and disposed inside the duct cover 40. That is, the second heat sink 32 may be formed with a second external heat-radiating passage B-2 partitioned by the first heat sink 31. [

The second external heat-radiating passage (B-2) may be provided separately from the first external heat-radiating passage (B-1). Further, the second external heat-radiating flow path (B-2) can flow outside air that is moved by natural convection. In detail, the second heat sink 32 can perform heat dissipation of the power semiconductor 90 disposed in the internal space of the power conversion device 1. [ At this time, the second heat sink 32 may receive heat from the power semiconductor 90 and be heated. If the temperature of the second heat sink 32 is increased to increase the temperature of the second heat sink 32, the outside air around the second heat sink 32 may form a natural convection flow in the direction toward the second heat sink 32 .

The direction of the external air flowing through the second external radiating passage B-2 is changed from the top to the bottom of the power inverter 1 or from the bottom to the top of the power inverter 1 .

For example, the lower portion of the electric power conversion apparatus 1 is heated by the heated external air passing through the first external heat radiation passage B-1 and discharged to the outside, Can be high. In this case, the direction of the external air flowing through the second external radiating passage (B-2) may flow in the direction from the lower part to the upper part.

On the other hand, when the temperature of the upper portion of the power conversion apparatus 1 is higher than the temperature of the lower portion of the power conversion apparatus 1, the direction of the external air flowing through the second external heat radiation path B- In the direction toward the lower side. It is not limited to this idea.

According to this configuration, the first heat sink 31 can be cooled by forced convection of the external air passing through the first external heat-radiating flow path (B-1). The second heat sink 32 can be cooled by natural convection of the external air passing through the second external heat-radiating passage B-2. The first heat sink 31 and the second heat sink 32 can exchange heat with each other due to a temperature difference between the first heat sink 31 and the second heat sink 32, have. Therefore, the heat radiation efficiency of the heat sink 30 can be improved.

Fig. 10 is a view showing a hanger part of the power conversion device according to the present embodiment, and Fig. 11 is an exploded view explaining the hanger part of the power conversion device according to the present embodiment.

Referring to FIGS. 10 and 11, a hooking portion 28 may be provided on the rear surface of the electric power conversion apparatus 1. FIG.

The hooking portion 28 may include the first hooking portion 281, the second hooking portion 282, and the third hooking portion 283. The first hooking portion 281, the second hooking portion 282, and the third hooking portion 283 may be detachably provided on the rear surface of the power conversion device 1.

The first hooking portion 281 may be disposed on the rear upper surface of the power conversion device 1. [ The first hooking portion 281 may include a first plate 2811 forming a body and a second plate 2812 and a third plate 2813 bent from the first plate 2811 have. The second plate 2812 may be formed at an upper end of the first plate 2811 and at a lower end of the third plate 2813. For example, the first hooking portion 281 may be formed in a " C " shape when viewed from the side. At this time, the second plate 2812 may be disposed above the third plate 2813.

The first hooking portion 281 may be provided with a through hole 2814 through which a fastening member for fixing the first hooking portion 281 to the wall or supporting structure can pass. In addition, the first hooking portion 281 may be provided with a fastening groove 2815 for fastening with the second hooking portion 282.

According to this configuration, the second plate 2812 of the first hooking portion 281 can support the power conversion device 1 at the upper portion. The third plate 2813 of the first hooking portion 281 can support the second hooking portion 282. [ At this time, the second hooking portion 282 may be engaged with the third plate 2813. It is not limited to this idea.

The third hooking portion 283 may be disposed at a lower rear portion of the power conversion device 1. [ The third hanging part 283 may include a fourth plate 2831 forming a body and a fifth plate 2832 and a sixth plate 2833 bent from the fourth plate 2831 have. The fifth plate 2832 may be bent at the upper end of the fourth plate 2831 and at the opposite ends of the sixth plate 2833. For example, the fifth plate 2832 may be formed by bending the upper end of the fourth plate 2831. The sixth plate 2833 may be formed by bending the opposite ends of the fourth plate 2831 in the same direction. It is not limited to this idea.

A part of the fifth plate 2832 may be bent to face upward. The second plate 282 may be engaged with the second plate 282. The third hooking portion 283 may be provided with a through hole 2834 through which a fastening member for fixing the third hooking portion 283 to the wall or supporting structure can pass. Also, the third hooking part 283 may be provided with a fastening groove (not shown) for fastening with the second hooking part 282.

According to such a configuration, the fifth plate 2832 of the third hooking portion 283 can support the lower portion of the power conversion device 1. [ The fifth plate 2832 may be mounted on the second hooking portion 282. It is not limited to this idea.

The second hooking part 282 may be disposed between the first hooking part 281 and the third hooking part 283. One side of the second hooking part 282 may be mounted on the first hooking part 281. The other side of the second hooking part 282 can be attached to the third hooking part 283. At this time, the second hooking part 282 may be fixed to the first hooking part 281. The third hooking part 283 may be engaged with the second hooking part 282.

In detail, the second hooking portion 282 can connect the first hooking portion 281 and the third hooking portion 283 to each other. The second hooking portion 282 includes a seventh plate 2821 disposed at the upper portion thereof, an eighth plate 2823 disposed at the lower portion thereof, and a second plate 2823 connected to the seventh plate 2821 and the eighth plate 2823 9 plate 2822 may be included. The seventh plate 2821 and the eighth plate 2823 may be provided on the upper and lower portions of the ninth plate 2822, respectively. The seventh plate 2821 and the eighth plate 2823 may protrude from the ninth plate 2822 in both directions. For example, the second hooking portion 282 may be formed in an " I " shape as viewed from the front. The seventh plate 2821 may be engaged with the first hooking part 281. The eighth plate 2823 can be engaged with the third hooking part 283. The second hooking portion 282 may be provided with fastening grooves 2824 and 2825 for fastening the first hooking portion 281 and the third hooking portion 283 to each other.

The second hooking portion 282 may be mounted on the first hooking portion 281 after the first hooking portion 281 is fixed to the wall or the support structure. After the third hooking part 283 is mounted on the second hooking part 282, the third hooking part 283 can be fixed to a wall, a support structure, or the like.

That is, the first hooking portion 281 and the third hooking portion 283 may be disposed in a wall, a support structure, or the like at a position suitable for supporting the power conversion device 1. Therefore, it is possible to solve the inconvenience that the user has to adjust the installation position of the first hooking part 281 and the third hooking part 283.

1 Power converter 10 Front case
20 rear case 28 latching part
30 Heatsink 40 Cover duct
60 Printed Circuit Board 70 Reactor
80 Fan 90 Power Semiconductor

Claims (14)

A front case forming a front surface;
A rear case coupled to the front case to form an inner space;
A heat sink coupled to the rear case;
An intake unit provided in the rear case for introducing outside air into the internal space;
A fan for forcibly flowing the outside air introduced through the intake unit;
An exhaust port through which the outside air forcedly forced by the fan is discharged to the outside space; And
And a duct cover covering the heat sink and guiding the outside air discharged through the air outlet in a direction toward the heat sink.
The method according to claim 1,
In the internal space,
A plurality of electric components for converting the form of power transmitted from the outside are disposed,
Wherein the plurality of electrical components include a printed circuit board, a reactor, and a power semiconductor.
3. The method of claim 2,
An internal heat-radiating flow path is formed in the intake portion toward the exhaust port,
And an external heat-radiating flow path is formed in the direction from the exhaust port toward the duct cover.
The method of claim 3,
Wherein the printed circuit board is provided in a plurality of the inner spaces,
Wherein at least one printed circuit board of the printed circuit board is spaced apart from the front case and the rear case so as to divide the internal space into at least two spaces.
5. The method of claim 4,
Wherein the first internal heat-radiating flow path and the second internal heat-radiating flow path are formed in each of the partitioned two internal spaces.
The method of claim 3,
The external heat-
A first external heat radiating flow path for flowing a part of the heat sink; and a second external heat radiating flow path for flowing the other part of the heat sink.
3. The method of claim 2,
Wherein the reactor is disposed adjacent to the exhaust port.
3. The method of claim 2,
And a part of the power semiconductor is in contact with the heat sink.
The method according to claim 1,
In the lower portion of the rear case,
A depression is provided which is recessed in the direction from the lower part to the upper part of the rear case,
Wherein the intake unit is provided on one side of the depression.
The method according to claim 1,
In the rear case,
A fixing portion extending rearward from the rear case,
And a hanger portion coupled to the fixing portion and supporting the rear case.
A body including a front case and a rear case coupled to the front case to form an inner space;
An inlet port for introducing outside air into the internal space;
An exhaust port through which exhaust air flows into the internal space of the body through the intake port;
A duct cover guiding a flow direction of the outside air discharged from the air outlet; And
A fan disposed on the exhaust port for forcedly flowing the outside air,
The body is provided with an internal flow path through which the outside air flowing into the inlet port flows toward the outlet,
Wherein the duct cover is formed with an external flow path through which external air flowing in the internal flow path flows along the duct cover.
12. The method of claim 11,
The body is provided with a partition for partitioning the internal space,
Wherein the internal flow path includes a first internal flow path that flows through a space partitioned by the partition portion and a second internal flow path that flows through another partitioned space.
12. The method of claim 11,
A heat sink is disposed inside the duct cover,
Wherein external air flowing through the internal flow path flows through a portion of the heat sink.
12. The method of claim 11,
The intake port is disposed at a lower portion of the body,
Wherein the exhaust port is disposed on an upper portion of the body.

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