JP2020108191A - Panel cooling structure - Google Patents

Abstract

To provide a panel cooling structure that can contribute to the cooling performance, downsizing, etc. of a panel.SOLUTION: A panel cooling structure comprises: a box-shaped peripheral wall 2 that forms a panel space part 11; a partition wall 3 that is mounted on the central part side of a panel standing direction (z direction) in the panel space part 11, and that extends in a panel horizontal direction (xy directions); and a heat exchanger 4 that is arranged on the peripheral wall 2 opposite to the partition wall 3. The partition wall 3 is formed with a through portion 31 in either direction of the residual two directions (y direction) of the four panel horizontal directions except for the heat exchanger side relative direction (x direction). In the heat exchanger 4, both openings of an air inlet port 41 and an air outlet port 43 are situated deviated toward an opposite side direction to the through portion 31, and both of them are situated apart having a predetermined distance in the panel standing direction with the partition wall 3 as a boundary. One of both openings is open to a ceiling wall 21 side in the panel space part 11, and the other of both openings is open to a bottom wall 22 side in the panel space part 11.SELECTED DRAWING: Figure 2

Description

The present invention relates to a panel capable of accommodating equipment such as a power conversion device applied to various facilities, and relates to, for example, a technique applicable to a cooling structure for the panel.

Devices such as power converters applied in various facilities are substances (such as dust, dust, flying salt, fine particulate matter, chemical substances) that can cause damage, corrosion, deterioration, etc. of the device depending on the installation environment. , Moisture, corrosive gas, etc.; hereinafter, simply referred to as causative substance).

In such a case, for example, a space portion that can be kept airtight in the board (for example, a space portion that is surrounded by a casing-like peripheral wall and that can be kept airtight; hereinafter, simply referred to as a board space portion) The device is properly accommodated in the device, and the device, for example, electronic components that make up the power conversion device, passive components such as transformers and inductors, and semiconductor power conversion element that is the main heat source, are isolated from the factor substances according to specifications. It is desirable to do. In addition, in the case where these devices include low heat-resistant device parts (such as a circuit board) or other parts, by appropriately providing a cooling function in the space inside the panel, It is desirable to suppress the temperature rise in the space inside the board.

For example, in Patent Document 1, a heat exchanger that absorbs heat and cools the air while circulating the air in the space inside the board, and the inner wall surface of the space inside the board (the inner wall surface of the peripheral wall that surrounds the space inside the board) ), a heat pipe that absorbs the heat conducted to the outer wall surface is disclosed. Patent Document 2 discloses a board in which a partition wall (circulation guiding member in Patent Document 2) is provided in the board space portion so that the air in the board space portion can circulate along the partition wall.

In the heat exchanger, an air intake port that inhales the air in the space inside the panel, an endotherm that absorbs the heat of the air inhaled from the air intake to cool the air, and an air that is cooled by the endothermic part ( And an exhaust port for returning cooled air) to the space inside the panel.

JP, 2017-204901, A JP, 2016-103876, A

In the case of the board cooling structure including the partition wall as in Patent Document 2, the air in the board internal space can be circulated in a desired circulation flow path, and the retention of the air can be suppressed.

However, due to the presence of the partition wall, pressure loss of the circulating air may occur, and the cooling performance may not be sufficiently exhibited. For example, it is considered that the pressure loss as described above can be reduced by making the circulation flow channel sufficiently large (for example, the cross-sectional area orthogonal to the circulation flow channel direction), but there is a possibility that the size of the panel may be increased. is there.

The present invention has been made in view of the above technical problems, and it is an object of the present invention to provide a board cooling structure capable of contributing to the board cooling performance, downsizing, and the like.

An electronic device housing according to the present invention can contribute to solving the above-mentioned problems, and one aspect thereof is an internal space portion of a board that is surrounded by a peripheral wall of the housing and can be kept airtight, In the space portion, a partition wall that extends in the intersecting direction intersecting the board standing direction on the side of the center of the board standing direction and that divides the space inside the board into a ceiling wall side and a bottom wall side. And a heat exchanger provided so as to face the partition wall on any of the side walls of the peripheral wall located in the intersecting direction, the panel cooling structure.

In this board cooling structure, the partition wall is a board in any one of the two opposite directions except the heat exchanger side direction and the heat exchanger opposite direction which are opposite to each other among the four directions of the cross direction. It is assumed that a penetrating portion penetrating in the standing direction is formed.

The heat exchanger is composed of an intake port for taking in the air in the space inside the panel, an endotherm for absorbing the heat of the air taken in from the intake port and cooling the air, and the air cooled by the endothermic part in the panel. And an exhaust port returning to the space.

Both openings of the intake port and the exhaust port are offset in the opposite direction of the penetrating part facing the penetrating part side direction in the two directions, and in the panel standing direction with the partition wall as a boundary. Located at a predetermined distance, one of the two openings is open to the ceiling wall side of the board space, and the other of the two openings is open to the bottom wall side of the board space. Is characterized by.

Further, a ventilator capable of ventilating in the circulation direction of air in the penetrating portion may be arranged in the penetrating portion.

In addition, the equipment is equipped with multiple equipment parts, and relatively high heat resistance equipment parts are placed on the side where the intake port is open on both the ceiling wall side and the bottom wall side of the space inside the panel. However, a device component having a relatively low heat resistance may be disposed on the side of the both of which the exhaust port is open.

Further, the equipment component may be supported on the inner wall surface of the side wall of each side wall in the direction opposite to the heat exchanger.

Further, the partition wall is formed with a cutout portion having a recessed shape in the direction opposite to the heat exchanger at the peripheral edge portion in the heat exchanger side direction, and the heat exchanger is penetrated in the thickness direction with respect to the side wall. The space between the openings of the intake port and the exhaust port of the heat exchanger may protrude into the space inside the panel, and the space between the openings may be received by the notch.

The heat exchanger may be provided on the side wall of the peripheral wall on the front side of the board.

Further, the intake port may be opened to the ceiling wall side in the board internal space, and the exhaust port may be opened to the bottom wall side in the board internal space.

As described above, according to the present invention, it is possible to contribute to the cooling performance and downsizing of the board.

The schematic perspective view of the board 10 which shows an example of the board cooling structure of this embodiment. Schematic explanatory views when the inside of the panel 10 is viewed from the front side, the right side, and the ceiling side, respectively ((A) is a side wall 23, a view with the heat exchanger 4 removed, (B) is a side wall 26, A view of the heat exchanger 4 with the ventilator 32 removed, (C) a view of the ceiling wall 21 and the device 5 removed, and (D) a schematic cross-sectional view of the heat exchanger 4 of (C). The schematic explanatory drawing which shows the other example of the partition wall 3 (The figure which faced similarly to FIG.2(C)). The schematic explanatory drawing which shows between both of the partition wall 3 and the heat exchanger 4 (drawing similar to FIG.2(C)).

The board cooling structure of the embodiment of the present invention is simply a structure in which a heat exchanger is provided on the peripheral wall of the board internal space portion, or a partition wall having a shape extending in a plurality of directions in the board internal space portion is provided (hereinafter, (Simply called a conventional structure).

That is, in the board cooling structure according to the present embodiment, in the space inside the board, an intersecting direction (hereinafter, simply referred to as a crossing direction) intersecting with the board standing direction on the center side of the board standing direction (the arrow z direction in FIG. 1 described later). By providing a partition wall extending in the horizontal direction of the board), the space inside the board is divided into a ceiling wall side and a bottom wall side.

Further, in the partition wall, of the four sides in the horizontal direction of the board (arrows xy directions in FIG. 1, which will be described later), both the heat exchanger side direction and the heat exchanger opposite side direction (arrows x in FIG. 1 described later) that face each other. Direction; hereinafter, simply referred to as relative direction on the heat exchanger side hereinafter), except for any of the remaining two directions that face each other (direction y in FIG. 1 to be described later; hereinafter referred to simply as relative direction on penetrating portion side) In the direction, it is assumed that a penetrating portion (for example, a notch portion or a through hole) penetrating in the board standing direction is formed.

Further, in the heat exchanger, both openings of the intake port and the exhaust port are positioned in a direction opposite to the penetration part in the relative direction of the penetration part (direction facing the penetration part), and the partition wall At a predetermined distance in the board standing direction, one of the openings is open to the ceiling wall side of the board space, and the other of the openings is the board space. The opening is on the bottom wall side of the section.

A partition cooling structure different from that of the present embodiment, for example, a partition wall extending in the panel upright direction and the panel horizontal direction in the space inside the panel like the conventional structure (in Patent Document 2, a cross-section of the first and second members is omitted. When it is provided with a T-shaped circulation guide member, a heat exchanger provided on one side wall of the four sides in the horizontal direction of the board (in Patent Document 2, a heat exchanger provided on the back surface of the storage board). ) Is operated, the air in the space inside the panel circulates along the partition wall, and it is possible that the retention of the air can be suppressed. However, when a partition wall having a shape extending in a plurality of directions as in the conventional structure is applied, pressure loss of the circulating air is likely to occur, and the cooling performance may not be sufficiently exhibited.

For example, in the case of the board disclosed in Patent Document 2, there is a possibility that the pressure loss as described above can be reduced by making the circulation flow channel sufficiently large (for example, the cross-sectional area orthogonal to the circulation flow channel direction is large). However, in the case of the panel of Patent Document 2, not only the heat exchangers are arranged in the relative direction on the heat exchanger side, but also a plurality of (two in FIG. 4 of Patent Document 2) circulation channels are arranged side by side. Since they are overlapped with each other, it is conceivable that the panels are increased in size in the relative direction of the heat exchanger side.

On the other hand, in the case of the board cooling structure according to the present embodiment, since the partition wall has a simple shape that simply extends in the board horizontal direction, it is easy to suppress the pressure loss of the air circulating in the board internal space. In addition, at both openings of the intake port and the exhaust port of the heat exchanger, they are appropriately positioned with reference to the arrangement configuration of the partition wall and the penetrating part, and the air in the space inside the panel can be sufficiently circulated. It becomes easy to suppress the retention of air. Therefore, there is a possibility that it can contribute to the cooling performance and downsizing of the panel.

In the device to be housed, for example, it may be housed in or taken out from the side wall in the horizontal direction of the board (for example, the side wall that can be kept airtight in the double-door structure). If it extends in the upright direction, the accommodation and removal can be easily hindered (for example, the directions of accommodation and removal are likely to be limited), and the handleability of the board may be reduced. On the other hand, according to the configuration in which the partition plate that simply extends in the horizontal direction of the board is applied as in the present embodiment, it is easy to store and take out the device from the horizontal direction of the board, which may contribute to the handleability. ..

The panel cooling structure of the present embodiment is provided with the partition wall extending in the horizontal direction of the panel as described above, and the intake port and the exhaust port of the heat exchanger are provided in accordance with the layout configuration of the partition wall and the penetrating part. Any configuration can be adopted as long as it is properly arranged, and it is possible to apply design common sense in various fields (for example, panel field, cooling field, power conversion device field, etc.) as appropriate and modify the design. The ones shown are listed.

<<Panel 10 which is an example of the board cooling structure according to the present embodiment>>
1 and 2 illustrate the configuration of a board 10 that is an example of this embodiment. The board 10 includes a housing-shaped peripheral wall 2 that forms a board internal space 11 inside the board 10 and a board on the center side of the board internal space 11 in the board standing direction (arrow z direction in FIG. 1). Mainly includes a partition wall 3 extending in the horizontal direction and a heat exchanger 4 provided on the peripheral wall 2 so as to face the partition wall 3. Then, the desired device 5 is housed in the board space 11 so that the board space 11 can be kept airtight.

<Peripheral wall 2>
The peripheral wall 2 is, for example, a panel-shaped peripheral wall member, a board frame, or the like that is appropriately assembled in a housing shape, and the four sides in the board horizontal direction between the ceiling wall 21 and the bottom wall 22 (arrow xy directions in FIG. 1) are side walls. It is surrounded by 23 to 26 and has a board space portion 11 in the peripheral wall 2. In this peripheral wall 2, for example, at least one of the side walls 23 to 26 can be opened/closed so that the device 5 can be housed in the board space 11 so that the device 5 can be freely taken out.

As a specific example, like the side wall 23 on the front side of the board 10 shown in FIG. 1, a plurality of peripheral wall members (two peripheral wall members 23a and 23b in FIG. 1) are provided, which can be opened and closed in a so-called double-door shape. It can be cited as a structure. According to such a side wall 23, when the side wall 23 is in the open state, it is possible to house or take out the device 5 from the front side of the board 10 into the space 11 in the board, and the side wall 23 is closed. In this case, it is possible to maintain the airtight state of the board space portion 11.

<Partition wall 3>
The partition wall 3 is, for example, a panel-shaped member, and is arranged so as to extend in the board horizontal direction at the central portion side of the board internal space portion 11 in the board standing direction. The partition wall 3 divides the board space portion 11 into a ceiling wall 21 side and a bottom wall 22 side. The supporting structure of the partition wall 3 is not particularly limited, but may be, for example, a structure of supporting it on the inner wall surface 2a of the peripheral wall 2 (the inner wall surface 2a such as the side wall 25 on the rear side of the board 10 as shown in FIG. 2). To be

In the partition wall 3, a penetrating portion 31 having a shape penetrating in the board standing direction is formed at a peripheral edge in any of the left and right side surfaces of the board 10 (corresponding to the relative direction of the penetrating portion side). In the case of the partition wall 3 shown in FIG. 2, a penetrating portion 31 is formed in the peripheral portion facing the side wall 24 on the left side surface of the board 10. With such a penetrating portion 31, the ceiling wall 21 side and the bottom wall 22 side of the board internal space portion 11 penetrate, and the air in the board internal space portion 11 circulates through the penetrating portion 31.

The form of the penetrating part 31 is not limited to the shape shown in FIG. 2 as long as the structure allows the air in the board space part 11 to pass therethrough. Specific examples of the penetrating part 31 include a notch-shaped penetrating part 31a as shown in FIG. 3(A) and a penetrating hole-shaped penetrating part 31b as shown in FIG. 3(B). ..

Further, in the penetrating portion 31, a ventilator 32 or the like may be appropriately arranged as shown in FIG. 2, for example. As a result, the air in the internal space 11 of the board easily passes through the penetrating portion 31, and the circulation is promoted. Then, the pressure loss in the circulation of the air is suppressed, and the backflow in the circulation is also suppressed.

As a specific example of the air blower 32, there is a configuration in which a rotary fan blade is provided and ventilation is possible in the rotation axis direction by rotation of the blade. In the case of such a ventilator 32, the rotation axis direction of the blade is the board standing direction, and the ventilation direction by the rotation of the blade is one side of the board standing direction (the ceiling wall 21 side or the bottom of the board space 11). It becomes the wall 22 side).

The ventilation direction of the fan 32 is appropriately set according to the circulation direction of air by the heat exchanger 4 (that is, appropriately set according to the opening positions of the intake port 41 and the exhaust port 43 of the heat exchanger 4 described later. ) Is possible. The amount of ventilation of the fan 32 changes depending on the shape of the blade, the number of revolutions, and the like.

<Heat exchanger 4>
The heat exchanger 4 includes an intake port portion 41 that intakes the air in the board space 11, an endothermic portion 42 that absorbs the heat of the air inhaled from the intake port portion 41 and cools the air, and an endothermic portion 42. An exhaust port portion 43 that returns cooled air (cooled air) to the board internal space portion 11 is provided.

Both the intake port portion 41 and the exhaust port portion 43 are provided at positions separated from each other on the side of the space 11 inside the panel of the heat exchanger 4. Further, the heat absorbing portion 42 is provided in a hollow portion that penetrates between both the intake port portion 41 and the exhaust port portion 43 in the heat exchanger 4, and absorbs the heat absorbed by the heat absorbing portion 42 to a heat radiating portion (for example, A heat radiating portion (44) configured to ventilate the outside air to radiate heat is configured to appropriately radiate heat to the outer peripheral side of the board 10.

In the heat exchanger 4 configured as described above, both the intake port portion 41 and the exhaust port portion 43 are positioned with a predetermined distance in the panel standing direction with the partition wall 3 as a boundary, The side wall 23 is provided at a position offset in the direction opposite to the penetrating portion (a position facing the partition wall 3 in the peripheral wall member 23b in FIGS. 1 and 2).

In the case of the heat exchanger 4 shown in FIGS. 1 and 2, the peripheral wall member 23b is penetrated in the thickness direction, and both sides of the intake port portion 41 and the exhaust port portion 43 of the heat exchanger 4 are inside the panel space portion. 11 side, and the heat radiating portion 44 side of the heat exchanger 4 is in a state of protruding to the outer peripheral side of the board 10.

In such a case, it is preferable that collision and interference do not occur between the partition wall 3 and the heat exchanger 4. For example, as shown in FIG. 4, in the partition wall 3, a peripheral edge portion facing the heat exchanger 4 (a peripheral edge portion in the heat exchanger side direction) has a notch having a shape recessed in the opposite direction to the heat exchanger. Forming the part 33 may be mentioned.

According to the cutout portion 33, the space between the intake port portion 41 and the exhaust port portion 43 of the heat exchanger 4 is received by the cutout portion 33, and collision between the partition wall 3 and the heat exchanger 4 is prevented. Interference can be suppressed. In addition, it becomes easy to divide the board space portion 11 into the ceiling wall 21 side and the bottom wall 22 side.

In addition, in the case of the heat exchanger 4 shown in FIGS. 1 and 2, the intake port portion 41 is open to the ceiling wall 21 side in the panel internal space portion 11, and the exhaust port portion 43 is the bottom wall 22 side in the panel internal space portion 11. It is open to. In this case, the ventilator 32 appropriately sets the ventilation direction (the orientation of the blade rotation axis, the rotation direction, etc.) so that the ventilation can be performed toward the ceiling wall 21 side.

<Device 5>
The device 5 housed in the in-board space 11 is not particularly limited, and various modes can be mentioned. For example, as shown in FIG. 2, a device component having a relatively high heat resistance (for example, a heat generating semiconductor switching element (IGBT or the like, a reactor or the like in the case of a power converter) 51 and a device having a relatively low heat resistance. When a component (for example, a capacitor or a resistor in the case of a power conversion device) 52 is provided, a configuration in which the device components 51 and 52 can be appropriately separated and arranged in the inboard space 11 is given. To be

In the case of FIG. 2, a device component 51 having a relatively high heat resistance is arranged on the ceiling wall 21 side of the board internal space 11, and a device having a relatively low heat resistance is provided on the bottom wall 22 side of the board internal space 11. A component 52 is arranged. In the case of such an arrangement configuration, for example, in the air on the ceiling wall 21 side of the in-panel space 11 (for example, the air that has absorbed the heat generated from the device component 51), the intake port portion that is open to the ceiling wall 21 side. 41 makes it easy to inhale. Thereby, in the air on the ceiling wall 21 side of the in-board space 11, the backflow to the bottom wall 22 side of the in-board space 11 can be suppressed, which can contribute to the protection of the device component 52.

In addition, in the case of the device parts 51 and 52 of FIG. 2, the side wall 23 of each of the side walls 23 to 26 located on the side opposite to the heat exchanger is extended along the inner wall surface 2a of the side wall 25. It is supported (for example, mounted on a flat plate-like substrate and appropriately supported on the inner wall surface 2a in a detachable manner). With such a support configuration of the device parts 51 and 52, there is a possibility that the panel 10 can contribute to reduction of the size in the heat exchanger side relative direction and suppression of pressure loss.

<Other>
As shown above, among the various elements constituting the panel 10, a portion projecting to the outer peripheral side of the panel 10 (for example, the heat exchanger 4 or the operation panel shown in FIG. 2 of Patent Document 2; If present, the disc projecting elements are preferably arranged appropriately, for example on one of the side walls 23-26.

For example, when the board protruding element is appropriately arranged on the side wall 23 on the front side of the board 10, it becomes easy to make the outer wall surfaces of the other side walls 24 to 26 substantially flat. This facilitates installation on the board 10 in, for example, the installation space of the facility (for example, installation along the inner wall surface of the installation space). When a plurality of boards 10 are installed, it becomes easy to arrange them in a row in the relative direction on the penetration portion side.

Further, since the board 10 is completely different from the structure in which the circulation flow paths are overlapped as in Patent Document 2, the board protruding element is arranged on the side wall 23 which is one side in the heat exchanger side relative direction. However, it is possible to sufficiently suppress the dimension (depth dimension, etc.) in the heat exchanger side relative direction.

The various elements that make up the board 10 may be made of various materials. As a specific example, the peripheral wall member and the board frame applied to the peripheral wall 2 may be made of metal (stainless steel or the like) or synthetic resin (carbon fiber reinforced plastic or the like).

Further, a material (sealing material or the like) necessary for maintaining the airtightness of the space 11 in the panel is appropriately applied (for example, to a mounting position of a peripheral wall member, a panel frame, or the like, a penetration position of the heat exchanger 4 on the side wall 23, or the like). Appropriate application) is also included.

<Example of air circulation in the space 11 in the panel>
When the heat exchanger 4 is operated in the panel 10, the air in the internal space 11 of the panel is circulated as indicated by arrows d1 to d5 in FIGS. First, the air cooled in the heat absorbing part 42 is discharged from the exhaust port part 43 of the heat exchanger 4 to the bottom wall 22 side of the internal space 11 in the direction opposite to the heat exchanger. The discharged air moves toward the penetrating side on the bottom wall 22 side of the board internal space 11 and heats the bottom wall 22 side of the board internal space 11 (heat generated from the device parts 52 and the like). Absorbs heat.

Next, the air on the bottom wall 22 side of the board internal space portion 11 moves to the ceiling wall 21 side of the board internal space portion 11 through the penetrating portion 31, and then while moving in the direction opposite to the penetrating portion, The heat (heat generated from the device parts 51 and the like) on the side of the ceiling wall 21 of the in-board space 11 is absorbed. Then, the air on the ceiling wall 21 side of the in-board space portion 11 is taken in by the intake port portion 41 of the heat exchanger 4 and cooled by the heat absorbing portion 42.

By circulating the air in the board internal space 11 as described above, the board internal space 11 is appropriately cooled, and the temperature rise is suppressed.

In the above, the present invention has been described in detail only with respect to the specific examples described, but it is obvious to those skilled in the art that various modifications can be made within the scope of the technical idea of the present invention. It goes without saying that such changes belong to the scope of the claims.

For example, in the partition wall 3, the board inner space portion 11 extends in the board horizontal direction at the center side in the board standing direction, and the board inner space portion 11 is divided into a ceiling wall 21 side and a bottom wall 22 side. It suffices that the configuration be such that the penetrating portion 31 that penetrates the ceiling wall 21 side and the bottom wall 22 side of the board internal space portion 11 is formed, and various aspects can be applied.

The heat exchanger 4 includes an intake port portion 41, a heat absorbing portion 42, and an exhaust port portion 43, and is appropriately arranged on any of the side walls 23 to 26 to circulate and cool the air in the board space portion 11. However, various modes can be applied.

10... Board 11... Board space 2... Peripheral wall 21... Ceiling wall 22... Bottom wall 23-26... Side wall 3... Partition wall 31... Penetration part 32... Ventilator 4... Heat exchanger 41... Intake port part 42... Endothermic Part 43... Exhaust port part 5... Equipment

Claims (7)

A space inside the board that is surrounded by a casing-like peripheral wall and can be kept airtight,
A partition that extends in the cross direction intersecting with the panel standing direction at the center side of the panel standing direction in the panel interior space and divides the panel interior space into a ceiling wall side and a bottom wall side. A wall,
In any of the side walls located in the intersecting direction of the peripheral wall, a heat exchanger provided to face the partition wall,
Equipped with
The partition wall, in the four directions of the intersecting direction, except the heat exchanger side direction opposite to each other and the heat exchanger opposite side direction, in any of the remaining two mutually opposite directions, penetrates in the panel standing direction. A penetrating part is formed,
Heat exchanger
An intake port that takes in air from the space inside the board,
An endothermic portion that absorbs the heat of the air taken in from the intake port and cools the air,
An exhaust port for returning the air cooled by the heat absorbing part to the space inside the panel,
Both the inlet and outlet openings are
Positioned in a direction opposite to the penetrating portion opposite to the penetrating portion side direction in the two directions, and located at a predetermined distance from each other in the board standing direction with the partition wall as a boundary,
A board cooling structure, wherein one of the openings is open to the ceiling wall side of the board space, and the other of the openings is open to the bottom wall side of the board space. The board cooling structure according to claim 1, wherein a ventilator capable of ventilating in a circulation direction of air in the penetrating portion is arranged in the penetrating portion. The device includes a plurality of device parts,
On both the ceiling wall side and the bottom wall side of the space inside the panel, on the side where the intake port is open, a relatively high heat-resistant equipment component is placed, and the exhaust port part of both is open. The panel cooling structure according to claim 1 or 2, wherein a device component having relatively low heat resistance is arranged on the side where the heat is applied. The board cooling structure according to any one of claims 1 to 3, wherein the equipment component is supported by an inner wall surface of a side wall of each side wall in a direction opposite to the heat exchanger. The partition wall is provided with a cutout portion having a recessed shape in a direction opposite to the heat exchanger, at a peripheral edge portion in the heat exchanger side direction,
The heat exchanger is penetrated in the thickness direction with respect to the side wall, a space between both openings of the intake port and the exhaust port of the heat exchanger projects into the space inside the panel, and a notch portion between the both openings. 5. The board cooling structure according to claim 1, wherein the board cooling structure is received by. The board cooling structure according to any one of claims 1 to 5, wherein the heat exchanger is provided on a side wall of the peripheral wall on the front side of the board. The panel according to any one of claims 1 to 6, wherein the intake port section is open to the ceiling wall side in the panel internal space section, and the exhaust port section is open to the bottom wall side in the panel internal space section. Cooling structure.

Images