JP6074346B2 - Switchboard equipment - Google Patents

Description

  The present invention relates to a switchboard device capable of efficiently cooling a plurality of high heat generating components in a housing.

  A power conversion device is used for power conversion, for example, when DC power and AC power are mutually converted or when it is desired to change the frequency of power. For example, in order to supply DC power generated by a solar cell panel to a three-phase AC load, a power conversion device called a power conditioner is interposed between the solar cell panel and the three-phase AC load. The power conversion device is generally assembled in a housing. The assembled power converter becomes a switchboard device.

  Conventionally, a switchboard device is formed by assembling various electrical components for each functional block outside the panel, and assembling the assembled functional blocks into a shelf structure or a multilayer structure inside the housing. The incorporated functional block is wired in the housing. The heat generated inside the casing is discharged outside the casing by circulating the air taken from the outside of the casing in the casing.

  However, the conventional switchboard device has a structure that is easy to increase in size due to its structure, assembly, and wiring method, and the work efficiency when mounting the case is poor. Also, inside the housing, electrical components that generate a large amount of heat at high temperatures but are resistant to dust (for example, transformers) and electrical components that generate a small amount of heat at low temperatures but are sensitive to dust (for example, power conversion) Main circuit components and control boards to be performed). For this reason, the discharge of heat generated inside the housing and the dust-proofing measures inside the housing are in a trade-off relationship and cannot be achieved at the same time.

  Therefore, in Patent Document 1 below, the inside of the casing is divided into two sections by a partition plate, and parts having different heat generation and dust resistance are arranged in different sections, while achieving both heat exhaust inside the casing and dust prevention measures. The housing size is reduced, and the convenience of assembly wiring and maintenance is improved.

  Further, in Patent Document 1, self-cooling using natural convection by providing a partition duct in the rear compartment so that the heat of the heat generating component disposed at the bottom does not affect the cooling of other heat generating components disposed at the top. A power converter is proposed.

JP 2012-10560 A

  However, in the invention described in Patent Document 1, since the heat generating component is cooled by natural convection, the cooling effect depends on the external environment where the power converter is installed and the strength of natural convection generated by the heat generating component.

  For example, in summer and indoor environments without wind, natural convection is weak, so the heat dissipation effect on the inside of the housing is low, and the heat-generating components cannot be cooled effectively. In addition, air convection in the housing is stronger as the heat-generating component generates a large amount of heat at a high temperature, but cooling a high heat-generating component that generates a large amount of heat at a high temperature requires a larger amount and rapid air flow. In many cases, natural convection does not meet this requirement.

  Further, in the invention described in Patent Document 1, the air sucked from the same intake port provided on the lower side of the casing is divided into two paths by a partition duct, and the heat generating component arranged on the upper side is cooled. Yes. For this reason, the air circulation path until reaching the heat generating component arranged on the upper side is long, and the cooling effect on the heat generating component is further weakened. Insufficient cooling of the heat generating components in the housing may cause malfunction of the heat generating components themselves, and the power conversion efficiency of the power conversion device may be lowered due to the temperature rise in the housing, and the life may be shortened. is there.

  Therefore, when a switchboard device capable of efficiently cooling a plurality of high heat generating components arranged inside the housing while reducing the size of the housing while considering the convenience of work is required. The structure and the component arrangement method cannot be adopted as they are.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a switchboard device capable of efficiently cooling a plurality of high heat generating components arranged in a housing.

  In order to achieve the above object, a switchboard device according to the present invention includes a first fan and a second fan in which a plurality of high heat-generating components are arranged inside a housing. A 1st fan discharges the heat | fever produced | generated by some highly heat-emitting components to the outer side of a housing | casing via a 1st ventilation path. The second fan discharges heat generated by some other high heat-generating components to the outside of the housing through the second ventilation path. The first ventilation path and the second ventilation path are formed as completely independent paths inside the housing.

  According to the switchboard device according to the present invention, a plurality of high heat-generating components are separately cooled by the ventilation path formed completely independently inside the housing. Since the air flowing in the different ventilation paths is blocked from each other, the heat generated by the high heat generation components in one of the ventilation paths hardly affects the cooling of the high heat generation components in the other ventilation path. Therefore, a plurality of high heat generating components can be efficiently cooled.

It is a right view inside the housing | casing of a power converter device. It is a front view inside the housing | casing of a power converter device. It is a rear view inside the housing | casing of a power converter device. It is an external view of the housing | casing of a power converter device. It is a figure which shows the air flow direction in the housing | casing of a power converter device.

  Hereinafter, the configuration and operation of the switchboard device according to the present embodiment will be described in detail. The switchboard device according to the present embodiment is a power converter for converting DC power generated by a solar cell panel into AC power and supplying the AC power to a three-phase AC load or connecting to a commercial power source.

(Configuration of power converter)
FIG. 1 is a right side view showing the configuration of the power conversion device, and FIG. 2 is a front view showing the configuration of the power conversion device. FIG. 3 is a rear view showing the configuration of the power converter, and FIG. 4 is an external view of the power converter.

  As shown in FIGS. 1 to 4, the power conversion device 1 includes a power conversion electrical component 2, a radiation fin 3, a partition plate 4, a ventilation duct forming member 5, a fan 6, and a fan 7. These components are housed in a housing 8 and constitute a housing-type power conversion device 1.

  The housing 8 has a rectangular parallelepiped shape in which six surfaces are surrounded by a front plate 81, a base 82, a ceiling plate 83, a right side plate 84, a left side plate 85, and a back plate 86.

  The power conversion electrical component 2 realizes the power conversion function of the power conversion device 1. The power conversion electrical component 2 includes electrical components such as a main circuit component 21, a control board 22, a transformer 23, an AC capacitor 24, and a smooth electrolytic capacitor 25, for example. Moreover, the electric component 2 for power conversion can contain other components other than the above.

  The main circuit component 21 constitutes a main circuit that converts DC power input from the outside into AC power and outputs the AC power to the outside. The main circuit component 21 includes, for example, an inverter unit 211, a DC power input terminal 212, circuit breakers 213 and 214, an AC power output terminal 215, and other various instruments. These main circuit components 21 are connected to each other by wiring along an electrical flow.

  The inverter unit 211 converts DC power into AC power. The inverter unit 211 includes, for example, an IGBT (Insulated Gate Bipolar Transistor) element that converts DC power into AC power. The inverter unit 211 generates a large amount of heat at a high temperature when converting DC power into AC power.

  The DC power input terminal 212 connects DC power from the outside to the main circuit. The DC power input terminal 212 has, for example, an N terminal and a P terminal as shown in FIG. The AC power output terminal 215 outputs the AC power converted by the main circuit to the outside. The AC power output terminal 215 has, for example, an R terminal, an S terminal, and a T terminal as shown in FIG.

  The circuit breaker 213 can block the input of the DC current input through the DC power input terminal 212 to the inverter unit 211. The circuit breaker 214 can block the output of AC power converted by the inverter unit 211 to the outside via the AC power output terminal 215. These electrical components generate a small amount of heat at a lower temperature than the inverter unit 211 during operation.

  The control board 22 controls the operation of the main circuit component 21 and acquires various detection signals from the main circuit. There may be a plurality of control boards 22 as required. The control boards 22 and the control board 22 and the main circuit component 21 are connected by wiring. The control board 22 generates a small amount of heat at a lower temperature than the inverter unit 211 during operation.

  The transformer 23 converts the voltage of the AC power converted by the inverter unit 211 into a desired voltage. When the voltage is converted, the transformer 23 generates a large amount of heat at a high temperature similarly to the inverter unit 211.

  The AC capacitor 24 and the smooth electrolytic capacitor 25 have a function of stabilizing the voltage on the main circuit and removing noise. These capacitors do not generate as much heat as the inverter unit 211 at the time of operation, but generate more heat than the other main circuit components 21 and the control board 22. In addition, these capacitors tend to shorten the life of the components themselves due to an increase in temperature.

  The radiating fin 3 is connected to the inverter unit 211 and releases heat generated by the inverter unit 211 to the inside of the housing 8. The radiating fin 3 has a plurality of fins in order to increase the surface area in order to improve the radiating performance.

  The partition plate 4 mounts the main circuit component 21, the control board 22, the heat radiating fins 3, and the smooth electrolytic capacitor 25. The partition plate 4 is parallel to the front plate 81 and the back plate 86, and is disposed on the entire surface in the middle of the depth of the housing 8 while securing a lower ventilation port. The partition plate 4 partitions the inside of the housing 8 into two front and rear sections, a front section FD and a rear section BD. The partition plate 4 is further provided with a plurality of holes, and various components can be mounted on the partition plate 4 by being attached using the holes. The partition plate 4 is preferably formed of a heat insulating material.

  The ventilation duct forming member 5 forms a sealed “L” -shaped ventilation duct 50 having openings at both ends in cooperation with the partition plate 4. The “L” -shaped ventilation duct 50 includes a horizontal portion 51, a vertical portion 52, and a corner portion 53. The horizontal portion 51 is formed in a horizontal funnel shape in which the opening area gradually decreases from the opening on the side surface side of the housing 8 toward the partition plate 4. The vertical portion 52 has a width that is the same as or slightly larger than the depth of the radiating fin 3, and is formed in parallel with the partition plate 4 so as to have an upper opening in the ceiling plate 83. The corner portion 53 is formed such that the horizontal portion 51 and the vertical portion 52 are connected at a right angle. The ventilation duct forming member 5 is preferably a heat insulating material.

  The fan 6 is disposed so that it fits into the upper opening of the vertical portion 52 of the ventilation duct 50 and the exhaust direction is perpendicular to the ceiling plate 83. The fan 6 actively flows the air inside the ventilation duct 50 and discharges it to the outside of the housing 8. The fan 6 can effectively cool the heat generating components disposed inside the ventilation duct 50. In FIG. 1, there is one fan 6, but there may be a plurality of fans.

  The fan 7 is disposed on the ceiling plate 83 such that the fan 7 is inclined inward in the side surface direction of the housing 8, and the exhaust air direction is inclined with respect to the ceiling plate 83. The fan 7 positively causes the air inside the casing 8 other than the inside of the ventilation duct 50 to flow and exhausts it to the outside of the casing 8. The fan 7 can effectively cool the heat generating components arranged inside the housing 8 other than the inside of the ventilation duct 50. In FIG. 1, the number of fans 7 is one, but there may be a plurality.

  As shown in FIG. 4, the front plate 81 of the housing 8 is a door opening / closing type, and is provided with a handle 91, a display portion opening 92, and a first lower intake port 93. Further, the back plate 86 can be composed of two back plates 861 and 862, and the upper intake port 94 and the second lower intake port 95 are opened in the respective back plates 861 and 862.

  The power conversion device 1 configured as described above converts DC power input from the outside into AC power of a desired voltage and outputs it to the outside by the power conversion electrical component 2. At the time of power conversion, a large amount of high-temperature heat generated by the inverter unit 211 and the transformer 23 released into the housing 8 is discharged to the outside of the housing 8 by the fan 6 and the fan 7.

(Arrangement of various parts in the housing)
Various components housed in the housing 8 are arranged in the front compartment FD or the back compartment BD respectively partitioned by the partition plate 4 according to the degree of heat dissipation that raises the temperature inside the housing 8. Specifically, a low heat generation component with a low heat dissipation level that does not substantially increase the temperature inside the housing 8 is disposed in the front section FD, and a heat dissipation level that increases the temperature inside the housing 8 is lower than the low heat generation component. The high heat-generating component is disposed in the back section BD.

  As shown in FIGS. 1 and 2, the main circuit component 21 and the control board 22 are mounted on the partition plate 4 and disposed in the front section FD as low heat generation components. Here, the inverter unit 211 that generates a large amount of heat at a high temperature is also arranged in the front section FD, but the heat generated by the inverter unit 211 is released into the housing 8 through the radiation fins 3. For this reason, the inverter unit 211 itself may be handled as a low heat generating component inside the housing 8.

  On the other hand, as shown in FIGS. 1 and 3, the transformer 23, the AC capacitor 24, the smooth electrolytic capacitor 25, and the heat radiating fins 3 are arranged in the back section BD as high heat generation components. The transformer 23 is disposed on the base 82, and the AC capacitor 24 is disposed above the transformer 23 by a support tool. The heat radiating fins 3 are disposed through the partition plate 4 while being connected to the inverter unit 211. The smooth electrolytic capacitor 25 is mounted on the partition plate 4 and disposed below the heat radiating fins 3.

  As described above, only the low heat generation components are arranged in the front section FD, and the high heat generation components are arranged in the back section BD. Since the low heat-generating component is not a heat source that directly raises the temperature inside the housing 8, cooling by natural air cooling is usually sufficient and does not need to be actively cooled. On the other hand, the high heat generation component is a heat generation source that directly raises the temperature inside the housing 8, so that cooling by natural air cooling is often insufficient and it is necessary to actively cool it.

  For this reason, in the power converter 1, by disposing the fan 6 and the fan 7 in the back section BD, air is actively flowed to dissipate the high heat-generating component. Therefore, in the front section FD, the positive air flow is small, and the dustproof property for the parts arranged in the front section FD is improved. In the rear section BD, the positive air flow is arranged in the back section BD. The cooling effect on the parts to be improved is improved.

(Placement of main circuit components)
The main circuit component 21 is mounted around the control board 22 in the order of the lower left part, the upper part, and the lower right part along the electrical flow during operation of the power converter 1, as indicated by the arrows in FIG. The control board 22 is mounted on the central portion of the partition plate 4, and the main circuit component 21 connected to the control board 22 by wiring is mounted on the partition plate 4 in a loop shape by an electrical flow. That is, on the surface on the front section FD side of the partition plate 4, the control board 22 and the main circuit component 21 are arranged such that the wiring is the shortest and the shortest.

  Therefore, noise caused by the length of wiring between the control boards 22, between the main circuit parts 21 and between the main circuit parts 21 directly connected to the control board 22 can be reduced, and malfunctions of various electric parts can be suppressed. The stability of the operation of the conversion device 1 is maintained. In addition, since the total number of wires is small, the amount of wiring work when mounting the housing 8 can be greatly reduced, and the number of wiring holders can be reduced. Furthermore, since the various electrical components mounted on the partition plate 4 are arranged in a plane, it is easy to replace the components at the time of failure or maintenance.

(Formation of ventilation path)
As shown in FIGS. 1 and 3, the high heat generating components are arranged in the rear compartment BD while having a vertical positional relationship. On the upper side, the radiation fins 3 and the smooth electrolytic capacitor 25 are arranged, and on the lower side, the transformer 23 and the AC capacitor 24 are arranged. When all the high heat generation components are cooled by the same ventilation path, the heat generated by the high heat generation parts located on the upstream side of the ventilation path affects the cooling of the high heat generation parts located on the downstream side. For example, the heat generated by the transformer 23 inhibits cooling of the radiation fins 3.

  As described above, in order to efficiently cool the high heat generating components arranged at different positions, the following measures are taken with respect to the ventilation path formed in the back surface section BD.

  As shown in FIG. 1, the ventilation duct 50 formed by the ventilation duct forming member 5 is arranged such that the heat radiating fins 3 are located in the vertical portion 52 and the smooth electrolytic capacitor 25 is located in the corner portion 53. The By the ventilation duct 50 formed in this way, two completely independent ventilation paths 54 and 55 are formed in the housing 8 as ventilation paths for cooling the high heat-generating components.

  The ventilation path 54 is a path that is connected to the upper air inlet 94 of the back plate 86, the fan 6, and the ventilation duct 50, and is used to cool the heat radiation fins 3 and the smooth electrolytic condenser 25 disposed in the ventilation duct 50. It is a route.

  The ventilation path 55 is a path in which the first lower intake port 93 of the front plate 81 and the second lower intake port 95 of the back plate 86 are connected to the fan 7, and is a transformer disposed outside the ventilation duct 50. 23 and a path for cooling the AC condenser 24.

  In this way, the high heat generating component located on the upper side and the high heat generating component located on the lower side are cooled by the fan 6 and the fan 7 through the completely independent ventilation path 54 and the ventilation path 55, respectively. The cooling effect for high heat-generating parts is improved.

(Operation of power converter)
When power is supplied to the power conversion device 1 and DC power is input from a solar cell panel (not shown) to the N terminal and the P terminal shown in FIG. 2, the inverter unit 211 converts the DC power into AC power. The converted AC power is converted to a desired voltage by the transformer 23 and output to the outside via the R terminal, S terminal, and T terminal shown in FIG.

  Thus, when the power converter 1 operates, the inverter unit 211 and the transformer 23 become main heat sources inside the housing 8. In addition, the greater the width of power that can be converted by the power conversion device 1, the more the inverter unit 211 and the transformer 23 generate heat.

  The heat generated by the inverter unit 211 is released to the back section BD by the heat radiating fins 3. The AC capacitor 24 and the smooth electrolytic capacitor 25 also release part of the heat into the housing 8. For this reason, in the power conversion device 1, when the main circuit operates, the power is also turned on to the fan 6 and the fan 7, and the heat generated inside the housing 8 is discharged to the outside of the housing 8.

  FIG. 5 is a diagram showing the flow direction of air inside the housing 8. The black arrow indicates the direction of air flow through the ventilation path 54, and the white arrow indicates the direction of air flow through the ventilation path 55.

  As shown in FIG. 5, the air in the ventilation path 54 is sucked into the ventilation duct 50 formed in the rear section BD from the upper intake port 94 of the rear plate 86 by the rotation of the fan 6. The sucked air flows along the ventilation duct 50 toward the fan 6, and exchanges heat with the smooth electrolytic capacitor 25 and the radiation fins 3 arranged in the ventilation duct 50. Then, the air heated by the heat exchange with the smooth electrolytic capacitor 25 and the radiation fins 3 is discharged from the ceiling to the outside of the housing 8 by the fan 6.

  On the other hand, the air in the ventilation path 55 is sucked into the rear compartment BD of the housing 8 from the first lower air inlet 93 of the front plate 81 and the second lower air inlet 95 of the rear plate 86 by the rotation of the fan 7. The air sucked from the first lower air inlet 93 passes through the front section FD, passes through the lower air vent of the partition plate 4 and flows to the rear section BD, and the air sucked from the second lower air inlet 95 directly It flows to the back section BD.

  The air flowing into the back surface section BD flows from the lower side to the upper side of the housing 8 toward the fan 7 and exchanges heat with the transformer 23 and the AC condenser 24 arranged on the lower side of the back surface section BD. Then, the air heated by heat exchange with the transformer 23 and the AC condenser 24 is raised and discharged from the ceiling to the outside of the housing 8 by the fan 7.

  Here, as shown in FIG. 5, the lateral portion 51 of the ventilation duct 50 that forms the ventilation path 54 is traversed in the upper space of the AC condenser 24. Therefore, the air in the ventilation path 55 in the upper space of the transformer 23 and the AC condenser 24 flows toward the fan 7 through the passage space on both sides of the ventilation duct 50.

  As described above, the ventilation path 54 and the ventilation path 55 are completely independent paths inside the housing 8. For this reason, the air flowing in the ventilation path 54 and the air flowing in the ventilation path 55 are less likely to be affected by heat.

  Therefore, even if the air in the ventilation path 55 is heated by exchanging heat with the transformer 23 and the AC condenser 24 that are high heat-generating parts, the heated air is different from the air in the first ventilation path. Heat exchange is difficult. For this reason, the air in the ventilation path 55 is unlikely to affect the cooling of the heat radiating fins 3 and the smoothing condenser 25 that are high heat generating components located in the ventilation path 54. That is, it is possible to efficiently cool the transformer 23 and the AC condenser 24 as well as the heat radiation fins 3 and the smoothing condenser 25 disposed on the upper side thereof.

  Further, as shown in FIG. 5, the air in the ventilation path 54 flows from the ventilation path part having a large opening area to the ventilation path part having a small opening area. For this reason, the air flow rate is increased in the path portion having a small opening area, and the cooling effect is further improved.

  As shown in FIG. 5, as the air in the ventilation path 55 approaches the fan 7, the white arrow indicating the air flow direction is biased toward the back plate 86. For this reason, air heated by heat exchange with the transformer 23 and the AC condenser 24 is suppressed to pass through the space in the ventilation path 55 near the vertical path portion of the ventilation path 54. Therefore, even if the ventilation duct 50 that forms the ventilation path 54 is not formed of a heat insulating material, heat exchange between the air in the ventilation path 55 and the air in the ventilation path 54 can be further suppressed. Further, when the power conversion device 1 is installed indoors and the back space and the ceiling space are minimum, it is possible to prevent the warm air discharged by the fan 7 from circulating to the upper air inlet 94 of the back plate 86. .

  The preferred embodiments of the present invention have been described above, but these are examples for explaining the present invention, and the scope of the present invention is not intended to be limited to these embodiments. The present invention can be implemented in various modes different from the above-described embodiments without departing from the gist thereof.

1 power converter,
2 Electrical components for power conversion,
3 Radiating fins,
4 dividers,
5 Ventilation duct forming members,
6,7 fans,
8 housing,
21 Main circuit components,
22 control board,
23 Transformer,
24 AC condenser,
25 Smooth electrolytic capacitor,
93 First lower inlet,
94 Upper inlet,
95 Second lower inlet,
211 inverter unit,
212 DC power input terminal,
213, 214 Circuit breaker,
215 AC power output terminal.

Claims (6)

In a switchboard device in which a plurality of high heat generating components are arranged inside the housing,
A first fan that discharges heat generated by some of the high heat-generating components to the outside of the housing via a first ventilation path;
A second fan that discharges heat generated by the other part of the high heat-generating component to the outside of the housing through a second ventilation path,
The first ventilation path and the second ventilation path are formed in completely independent paths inside the housing ,
The first ventilation path is formed by forming a ventilation duct inside the housing,
The second ventilation path is formed in a space other than the ventilation duct in the housing,
The ventilation duct is formed on the upper side inside the casing, crosses the second ventilation path, extends laterally from the side surface of the casing, and extends toward the upper surface of the casing. A switchboard device comprising a vertical portion and a corner portion connecting the horizontal portion and the vertical portion . In the switchboard apparatus in which the interior of the housing is partitioned into two front and rear sections by a partition plate, low heat generation components are disposed in the front section of the housing, and a plurality of high heat generation components are disposed in the rear section of the housing.
A first fan that discharges heat generated by a part of the high heat-generating component arranged on the upper side to the outside of the housing via the first ventilation path and the lower side are arranged on the rear section. A second fan for discharging heat generated by the other part of the high heat-generating component to the outside of the housing through a second ventilation path,
The first ventilation path and the second ventilation path are formed in completely independent paths inside the housing ,
The first ventilation path is formed by forming a ventilation duct inside the housing,
The second ventilation path is formed in a space other than the ventilation duct in the housing,
The ventilation duct is formed on the upper side inside the casing, crosses the second ventilation path, extends laterally from the side surface of the casing, and extends toward the upper surface of the casing. A switchboard device comprising a vertical portion and a corner portion connecting the horizontal portion and the vertical portion . The inside of the housing is divided into two front and rear sections by a partition plate, and main circuit components that constitute a main circuit including an inverter unit that converts DC power input from the outside into AC power are provided on the front section of the housing. Mounted on the partition plate, the rear section of the housing is mounted on the partition plate on the upper side of the transformer and the transformer for converting the converted AC power into the power of the desired voltage on the lower side In a switchboard device in which heat dissipating fins that conduct heat generated by the inverter unit are arranged,
The back section is generated by the transformer and a first fan that discharges heat generated by the inverter unit conducted by the heat radiating fins to the outside of the housing through a first ventilation path. A second fan that discharges heat to the outside of the housing via a second ventilation path is disposed;
The first ventilation path and the second ventilation path are formed in completely independent paths inside the housing ,
A control board that controls the operation of the main circuit component and obtains various detection signals from the main circuit is further mounted in the center of the partition plate in the front section,
The main circuit component is a switchboard device mounted around the control board in a loop shape along an electrical flow . In a switchboard device in which a plurality of high heat generating components are arranged inside the housing,
A first fan that discharges heat generated by some of the high heat-generating components to the outside of the housing via a first ventilation path;
A second fan that discharges heat generated by the other part of the high heat-generating component to the outside of the housing through a second ventilation path,
The first ventilation path and the second ventilation path are formed in completely independent paths inside the housing ,
The first fan and the second fan are provided on an upper surface of the housing,
The air in the first ventilation path and the second ventilation path is forcibly discharged from the lower side to the upper side by the first fan and the second fan,
The second fan is provided on the side of the housing from the first fan,
The first fan is provided such that a wind exhaust direction is perpendicular to an upper surface of the housing,
The switchboard device , wherein the second fan is provided so as to be inclined inward in a side surface direction of the housing such that a wind exhaust direction is inclined with respect to an upper surface of the housing . In the switchboard apparatus in which the interior of the housing is partitioned into two front and rear sections by a partition plate, low heat generation components are disposed in the front section of the housing, and a plurality of high heat generation components are disposed in the rear section of the housing.
A first fan that discharges heat generated by a part of the high heat-generating component arranged on the upper side to the outside of the housing via the first ventilation path and the lower side are arranged on the rear section. A second fan for discharging heat generated by the other part of the high heat-generating component to the outside of the housing through a second ventilation path,
The first ventilation path and the second ventilation path are formed in completely independent paths inside the housing ,
The first fan and the second fan are provided on an upper surface of the housing,
The air in the first ventilation path and the second ventilation path is forcibly discharged from the lower side to the upper side by the first fan and the second fan,
The second fan is provided on the side of the housing from the first fan,
The first fan is provided such that a wind exhaust direction is perpendicular to an upper surface of the housing,
The switchboard device , wherein the second fan is provided so as to be inclined inward in a side surface direction of the housing such that a wind exhaust direction is inclined with respect to an upper surface of the housing . A first lower air inlet is formed on the front surface of the housing,
A second lower air inlet and an upper air inlet are formed on the rear surface of the housing,
The first ventilation path is a path connecting the upper intake port and the first fan,
The switchboard device according to any one of claims 1 to 5 , wherein the second ventilation path is a path that connects the first lower air inlet, the second lower air inlet, and the second fan.

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