JP2023032456A - electrical equipment unit - Google Patents

Abstract

To provide an electrical equipment unit capable of improving the placement efficiency and cooling efficiency of multiple configure elements inside a housing.SOLUTION: An electrical equipment unit in an embodiment includes a housing, electrical equipment, and at least one of a main circuit input unit and a main circuit output unit. The electrical equipment is placed inside the housing. The electrical equipment includes a fan and a main circuit. The main circuit performs input to the main circuit. The main circuit output unit performs output from the main circuit. At least one of the main circuit input unit and the main circuit output unit is placed downstream of the main circuit in the direction of ventilation by the fan inside the housing.SELECTED DRAWING: Figure 1

Description

Embodiments of the present invention relate to electrical equipment units.

2. Description of the Related Art Conventionally, there is a power converter in which cooling air is circulated inside a housing by a fan arranged in the housing.
However, when a fan is provided in an appropriate part of the housing such as the ceiling wall, the degree of freedom in layout of a plurality of electrical devices arranged inside the housing is restricted according to the shape of the housing. It may not be possible to improve the arrangement efficiency and cooling efficiency of multiple electrical devices inside the body.

JP 2020-188622 A WO2019/097712

The problem to be solved by the present invention is to provide an electric device unit that can improve the arrangement efficiency and cooling efficiency of a plurality of components inside the housing.

An electric device unit of an embodiment includes a housing, an electric device, and at least one of a main circuit input section and a main circuit output section. The electrical equipment is arranged inside the housing. An electrical device includes a fan and a main circuit section. The main circuit input section performs input of the main circuit section. The main circuit output section outputs the main circuit section. At least one of the main circuit input section and the main circuit output section is arranged on the downstream side of the main circuit section in the ventilation direction of the fan inside the housing.

The perspective view which shows the structure of the electric equipment unit of embodiment. FIG. 4 is a view of the electrical equipment unit of the embodiment, with a part of the housing cut away, viewed from above in the vertical direction (Z-axis direction);

An electric device unit according to an embodiment will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the configuration of an electric equipment unit 10 of the embodiment. FIG. 2 is a view from above in the vertical direction (Z-axis direction) with a part of the housing of the electric device unit 10 of the embodiment cut away.

Hereinafter, directions of the X-axis, Y-axis, and Z-axis that are orthogonal to each other in the three-dimensional space are directions parallel to the respective axes. For example, the left-right direction of the electric device unit 10 is parallel to the X-axis direction. The front-rear direction of the electrical device unit 10 is parallel to the Y-axis direction. The up-down direction and vertical direction of the electric device unit 10 are parallel to the Z-axis direction. The positive direction of the Z-axis direction is the direction from the bottom to the top of the electric device unit 10 .

As shown in FIGS. 1 and 2, the electrical equipment unit 10 of the embodiment is, for example, a board provided in electrical equipment or the like. The board is a distribution board, a distribution board, a control board, or the like that constitutes a power conversion device, a power supply device, a motor drive device, or the like.
The electrical device unit 10 includes a housing 11 and a plurality of electrical devices 12 and a plurality of circuit components 13 provided in the housing 11 .
The housing 11 includes an opening/closing door 22 that opens and closes an opening 21 formed in the front portion 11F in the front-rear direction. The housing 11 is formed with an intake port 23 and an exhaust port 24, for example, at both ends (that is, left and right side portions) 11R and 11L in the left and right direction. The intake port 23 and the exhaust port 24 ventilate the cooling air flowing inside the housing 11 .

A plurality of electrical devices 12 are arranged inside the housing 11 . Each of the electrical devices 12 includes, for example, a power converter 31 and a fan 32 . The power converter 31 includes, for example, circuit components such as a plurality of semiconductor elements 31a forming a main circuit section and a plurality of conductors 31b forming an input/output section. The power converter 31 is, for example, an inverter or the like.
The plurality of semiconductor elements 31a of the power converter 31 are, for example, transistors that are switching elements for energization switching, diodes for rectification, and the like. The plurality of conductors 31b performs at least one of input and output of energization of the power converter 31, for example. The outer shape of each conductor 31b is, for example, a rod-like shape or plate-like shape made of metal.

A plurality of semiconductor elements 31a of the power converter 31 are arranged on a substrate having a heat sink, for example. The multiple semiconductor elements 31a are cooled by, for example, a cooling medium such as a heat sink provided on the substrate. The plurality of semiconductor elements 31a are arranged on the intake side of the fan 32, for example.
The plurality of conductors 31b of the power converter 31 are arranged along the ventilation direction F of the cooling air by the fan 32, for example. At least part of each conductor 31 b is arranged downstream of the power converter 31 in the direction F of the cooling air by the fan 32 . For example, at least a portion of each conductor 31 b connected to circuit components on the board of power converter 31 is located on the exhaust side of fan 32 . At least part of each conductor 31 b is cooled by cooling air blown by the fan 32 .

The fan 32 is arranged, for example, between the plurality of semiconductor elements 31a of the power converter 31 in the blowing direction F and at least part of each conductor 31b. For example, the fan 32 is arranged between the plurality of semiconductor elements 31a on the upstream side in the blowing direction F and at least a part of each conductor 31b on the downstream side in the blowing direction F.
A ventilation direction F of the fan 32 is a direction intersecting the vertical direction of the housing 11 . For example, the ventilation direction F of the fan 32 is parallel to the left-right direction of the housing 11 and connected to the intake port 23 and the exhaust port 24 of the housing 11 .

Each of the plurality of circuit components 13 is an object to be cooled by cooling air blown by the fan 32 . The multiple circuit components 13 include, for example, a first circuit component 13a and a second circuit component 13b. The first circuit component 13 a is, for example, a component for a control circuit that controls the power converter 31 of each electrical device 12 . The first circuit component 13a is, for example, a component such as a substrate and a relay. The second circuit component 13b is, for example, a component that is connected to the main circuit section of each electric device 12 . The second circuit component 13b is, for example, a component such as a conductor, a fuse, a capacitor, and a transformer.

The first circuit component 13 a and the second circuit component 13 b are arranged inside the housing 11 on both sides of each electric device 12 in the ventilation direction F of the fan 32 of each electric device 12 . The first circuit component 13a is arranged on the intake side of the fan 32, for example, on the upstream side of each electric device 12 in the ventilation direction F. As shown in FIG. The second circuit component 13b is arranged on the exhaust side of the fan 32, for example, on the downstream side of each electric device 12 in the ventilation direction F. As shown in FIG. The predetermined upper limit temperature set for the second circuit component 13b is relatively higher than the predetermined upper limit temperature set for the first circuit component 13a.

With such a configuration, by driving the fan 32, outside air is drawn into the housing 11 through the air inlet 23 of the housing 11 and becomes cooling air, and this cooling air flows horizontally inside the housing 11. It flows in the direction (the direction crossing the vertical direction, ventilation direction F). Then, the cooling air is discharged from the exhaust port 24 . While the cooling air flows from the intake port 23 to the exhaust port 24, the first circuit component 13a and the second circuit component 13b are cooled. At the same time, the plurality of semiconductor elements 31 a of the power converter 31 are cooled via a cooling medium such as a heat sink, and the plurality of conductors 31 b are cooled by cooling air blown by the fan 32 .

According to the embodiment described above, the electric device unit 10 includes the plurality of conductors 31b forming the input/output section downstream of the plurality of semiconductor elements 31a forming the main circuit section with respect to the ventilation direction F of the fan 32. By providing, the cooling efficiency can be improved. For example, compared to the case where the plurality of conductors 31b are arranged on the upstream side of the plurality of semiconductor elements 31a in the ventilation direction F of the fan 32, each conductor 31b which is one of the main heat-generating portions in each electric device 12 It is possible to suppress the heat from being transferred to the plurality of semiconductor elements 31a.

In addition, since each electric device 12 arranged inside the housing 11 is provided with the fan 32, the arrangement efficiency of various items inside the housing 11 can be improved. For example, when a fan is provided on the top wall of the housing 11, the fan protrudes outward from the top wall of the housing 11, creating a wasted space around the projecting portion that cannot be used for arranging articles. There is a risk. Since the height of the housing 11 can be reduced compared to the case where the fan is provided on the ceiling wall of the housing 11, the height direction of the electric equipment unit 10 can also be reduced.

The electric device unit 10 includes the first circuit component 13a and the second circuit component 13b arranged on both sides of the airflow direction F of the fan 32, namely, the intake side and the exhaust side. The arrangement efficiency and cooling efficiency of the two-circuit component 13b can be improved. For example, compared to the case where a cooling fan is provided in a part of the housing 11, the freedom of layout is restricted in order to ensure the desired cooling efficiency of the circuit components 13a and 13b. can be suppressed. The first circuit component 13a and the second circuit component 13b can be cooled by using both the upstream cooling air flow and the downstream cooling air flow of one fan 32 .

By arranging the fan 32 in the center of the first and second circuit components 13a and 13b (between the both 13a and 13b), strong air (cooling air) can be evenly applied to the circuit components 13a and 13b. . Since the circuit components 13a and 13b are also cooled using the fan 32 provided in the electrical equipment 12, for example, a cooling fan is provided on each of the first circuit component 13a side and the second circuit component 13b side. , and the number of parts of the electrical equipment unit 10 can be reduced.

The first circuit component 13a, which is a component for the control circuit, and the second circuit component 13b, which is a component connected to the main circuit, are separated on the intake side and the exhaust side of the fan 32, so that they are mutually connected. Heat transfer due to heat generation can be suppressed. By arranging the first circuit component 13a on the intake side of the fan 32, the heat generated by the second circuit component 13b is reduced compared to the case where the first circuit component 13a is arranged on the exhaust side of the fan 32, for example. can suppress heat transfer due to

By providing a plurality of fans 32 appropriately arranged inside the housing 11 , the ventilation direction F of the cooling air can be appropriately set inside the housing 11 . The arrangement efficiency can be improved while ensuring the desired cooling efficiency of the plurality of circuit components 13 according to the ventilation direction F of the cooling air.

By providing the housing 11 in which the intake port 23 and the exhaust port 24 are formed on both sides of the fan 32 in the ventilation direction F, the first circuit component 13a and the second circuit component 13a arranged on both sides of each electric device 12 are provided. The cooling efficiency of the component 13b can be improved. For example, compared to the case of providing a cooling fan arranged in a part of the housing 11, there is no wasted space in the space inside the housing 11, and a plurality of cooling fans can be efficiently supplied to the vicinity of the inner surface of the housing 11. components can be placed.

By providing each electric device 12 with a fan 32 having a ventilation direction F parallel to the vertical direction of the housing 11, for example, the horizontal direction, a plurality of fans can be arranged in the space extending from the upper part to the lower part in the vertical direction. Components can be placed. For example, even if the shape and size of the housing 11 in the vertical direction are appropriately regulated, it is possible to improve the arrangement efficiency while ensuring the desired cooling efficiency for the plurality of components inside the housing 11. can.

Modifications will be described below. It should be noted that the same parts as those of the above-described embodiment are denoted by the same reference numerals, and descriptions thereof are omitted or simplified.
In the above-described embodiment, the ventilation direction F of the fan 32 is parallel to the left-right direction of the housing 11, but it is not limited to this. For example, the ventilation direction F may be set in an appropriate direction of the housing 11 . Further, the fans 32 of the plurality of electric devices 12 may be arranged so that the airflow shape of the cooling air inside the housing 11 has an appropriate shape.

In the above-described embodiment, the conductor 31b for inputting or outputting current in the power converter 31 of each electrical device 12 may be, for example, a flexible conductor or the like having flexibility due to a braided wire or laminated plate. By providing the conductor 31b, which is a flexible conductor, each electric device 12 can improve the cooling efficiency by increasing the surface area, and at the same time can dampen or insulate vibrations.

According to at least one embodiment described above, the electric device unit 10 includes a plurality of semiconductor elements 31a forming the input/output section downstream of the plurality of semiconductor elements 31a forming the main circuit section with respect to the ventilation direction F of the fan 32. , the cooling efficiency can be improved. For example, compared to the case where the plurality of conductors 31b are arranged on the upstream side of the plurality of semiconductor elements 31a in the ventilation direction F of the fan 32, each conductor 31b which is one of the main heat-generating portions in each electric device 12 It is possible to suppress the heat from being transferred to the plurality of semiconductor elements 31a.

In addition, since each electric device 12 arranged inside the housing 11 is provided with the fan 32, the arrangement efficiency of various items inside the housing 11 can be improved. For example, when a fan is provided on the top wall of the housing 11, the fan protrudes outward from the top wall of the housing 11, creating a wasted space around the projecting portion that cannot be used for arranging articles. There is a risk. Since the height of the housing 11 can be reduced compared to the case where the fan is provided on the ceiling wall of the housing 11, the height direction of the electric equipment unit 10 can also be reduced.

The electrical device unit 10 includes the first circuit component 13a and the second circuit component 13b arranged on both sides of the airflow direction F of the fan 32, namely, the intake side and the exhaust side. The arrangement efficiency and cooling efficiency of the two-circuit component 13b can be improved. For example, compared to the case where a cooling fan is arranged in a part of the housing 11, the freedom of layout is restricted in order to ensure the desired cooling efficiency of the circuit components 13a and 13b. can be suppressed. The first circuit component 13a and the second circuit component 13b can be cooled by using both the upstream cooling air flow and the downstream cooling air flow of one fan 32 .

By arranging the fan 32 in the center of the first and second circuit components 13a and 13b (between the both 13a and 13b), strong air (cooling air) can be evenly applied to the circuit components 13a and 13b. . Since the circuit components 13a and 13b are also cooled using the fan 32 provided in the electrical equipment 12, for example, a cooling fan is provided on each of the first circuit component 13a side and the second circuit component 13b side. , and the number of parts of the electrical equipment unit 10 can be reduced.

The first circuit component 13a, which is a component for the control circuit, and the second circuit component 13b, which is a component connected to the main circuit, are separated on the intake side and the exhaust side of the fan 32, so that they are mutually connected. Heat transfer due to heat generation can be suppressed. By arranging the first circuit component 13a on the intake side of the fan 32, the heat generated by the second circuit component 13b is reduced compared to the case where the first circuit component 13a is arranged on the exhaust side of the fan 32, for example. can suppress heat transfer due to

By providing a plurality of fans 32 appropriately arranged inside the housing 11 , the ventilation direction F of the cooling air can be appropriately set inside the housing 11 . The arrangement efficiency can be improved while ensuring the desired cooling efficiency of the plurality of circuit components 13 according to the ventilation direction F of the cooling air.

By providing the housing 11 in which the intake port 23 and the exhaust port 24 are formed on both sides in the ventilation direction F of the fan 32, the first circuit component 13a and the second circuit component 13a arranged on both sides of each electric device 12 are provided. The cooling efficiency of the component 13b can be improved. For example, compared to the case of providing a cooling fan arranged in a part of the housing 11, there is no wasted space in the space inside the housing 11, and a plurality of cooling fans can be efficiently provided to the vicinity of the inner surface of the housing 11. components can be placed.

By providing each electric device 12 with a fan 32 having a ventilation direction F parallel to the vertical direction of the housing 11, for example, the horizontal direction, a plurality of fans can be arranged in the space extending from the upper part to the lower part in the vertical direction. Components can be placed. For example, even if the shape and size of the housing 11 in the vertical direction are appropriately regulated, it is possible to improve the arrangement efficiency while ensuring the desired cooling efficiency for the plurality of components inside the housing 11. can.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 10... Electric equipment unit 11... Housing 12... Electric equipment 13a... First circuit component 13b... Second circuit component 23... Intake port 24... Exhaust port 32... Fan

Claims (4)

a housing;
an electric device disposed inside the housing and including a fan and a main circuit unit;
A main circuit input section for inputting to the main circuit section and a main circuit output section for outputting from the main circuit section are arranged inside the housing on the downstream side of the main circuit section in the ventilation direction of the fan. at least one of the
Electrical equipment unit comprising: a main circuit component arranged on the exhaust side of the fan inside the housing and connected to the main circuit unit;
a control circuit component arranged on the intake side of the fan inside the housing and controlling the main circuit unit;
The electrical equipment unit of claim 1, comprising: 3. The electric device unit according to claim 1, further comprising the housing having vents communicating with the interior on both sides in the ventilation direction. The electric device unit according to any one of claims 1 to 3, wherein the ventilation direction is a direction that intersects the vertical direction of the housing corresponding to the vertical direction.

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