JP2019212660A - Control unit and enclosure for control unit - Google Patents

Abstract

To efficiently discharge heat generated in a control unit to the outside without decreasing strength of an enclosure.SOLUTION: The present invention relates to a control unit 150 that includes: an enclosure which has a top surface 84 and a bottom surface 82, and a side wall connected to an edge of the top surface and an edge of the bottom surface, and partitions off the inside and the outside; and a control board 96 and a power circuit 92 arranged in the enclosure, a first opening 80 being formed at a first part closer to the top surface of the enclosure than the bottom surface. The control unit further includes a first guide member 160 that is arranged below the top surface inside the enclosure, and is formed having one end in contact with an end face of the first opening close to the top surface or an enclosure inner face adjoining the end face and the other end provided extending from the first opening into the enclosure to a position where it cross at least a part of a projection line from the power circuit to the top surface, a distance to the top surface monotonously increasing as a function of a distance from the first opening, so that at least a part of air heated by the power circuit is guided to the first opening.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a control unit and a housing for the control unit.

  In the case of an electrical device that generates heat in an internal circuit, as disclosed in Patent Document 1 described later, an intake port is provided on the front surface and an exhaust port is provided on the back surface. It is common to cool the circuit.

  Some control circuits for controlling electrical equipment are housed together with a power supply circuit in a separate housing from the electrical equipment to form a control unit. Such a control unit is usually installed near an electric device to be controlled. On the other hand, a circuit housed inside the control unit, particularly a power supply circuit, generates a large amount of heat. For this reason, as described above, the power supply circuit is provided with a fan for forcibly cooling the power supply circuit. Particularly in the case of a control unit having a large calorific value, heat can be efficiently released by providing an opening on the top surface.

  By the way, the installation location of the control unit may be limited due to some factors. For example, in places where there is a high possibility that foreign matter will fall from the top of the control unit installation location, if an opening is formed on the top surface of the housing, there is a risk that the foreign material will enter the housing from there and adversely affect the control circuit There is. Therefore, in the case of a control unit installed in such a place, an opening cannot be formed on the top surface of the housing.

  FIG. 1 shows a perspective view of an example that can be considered as a control unit housing for coping with such a problem. 2 is a cross-sectional view taken along arrow 2-2 in FIG. 3 is a cross-sectional view taken along arrow 3-3 in FIG.

  1 to 3, a conventional control unit 50 includes a housing 60, a control circuit 94 housed in the housing 60, a power circuit 90 for supplying power to the control circuit 94, A control circuit 96 and a power supply circuit 92 for supplying power to the control circuit 96 are included.

  The housing 60 has a rectangular parallelepiped shape, and includes a bottom surface 82 and a top surface 84, a right side surface 66 and a left side surface 68, a front surface 62 and a back surface 64, a breaker 70 provided outside the front surface 62, and terminal blocks 72 and 74. Including. Since the breaker 70 and the terminal blocks 72 and 74 are not directly related to the present invention, they are not shown in FIG. In particular, referring to FIG. 2, the housing 60 includes a terminal block 98, a control circuit 100, and a partition plate 102 for partitioning a region where these are formed and a region where the power supply circuits 90 and 92 are formed. Including.

  2 and 3, an intake port 76 and an exhaust port 78 are formed on the right side surface 66 and the left side surface 68 at positions facing each other across the power supply circuits 90 and 92. Cooling fans (not shown) are arranged in the power supply circuits 90 and 92, and the power supply circuits 90 and 92 are cooled by the intake air 120 from the intake port 76 by this fan, and the heated exhaust 122 is discharged from the exhaust port 78. Exhaust from. Further, as indicated by an arrow 124 in FIG. 3, the heated air rises to the top surface 84 side by convection in the housing 60. Since it is difficult to exhaust them to the outside of the housing 60 only with the air inlet 76 and the air outlet 78, a position near one of the side surfaces of the housing 60 (the left side surface 68 in the case of FIG. 3) close to the top surface 84. An opening 80 is formed in the opening 80 so that heated air is also discharged from the opening 80.

JP-A-2017-147318

  However, referring to FIG. 3, since the air heated by the power supply circuit 92 moves upward in the housing 60 by convection as indicated by an arrow 124, the opening 80 alone cannot exhaust sufficiently, and the housing There is a problem that heat builds up inside 60. It may be possible to promote exhaust by forming the opening 80 directly below the top surface 84 or by forming an opening similar to the opening 80 on the other side surface, but in that case, the strength of the housing 60 is reduced. There are problems and it's not a good solution. If heat accumulates inside the housing 60, the operation of the control circuit 94 or the control circuit 96 may be adversely affected. Therefore, a mechanism for efficiently releasing the heat generated in the housing 60 to the outside is necessary.

  Therefore, an object of the present invention is to provide a control unit and a housing for the control unit that can efficiently discharge the heat generated in the control unit to the outside without reducing the strength of the housing.

  A control unit according to a first aspect of the present invention includes a top surface and a bottom surface, and a housing that defines an interior and an exterior, having a side wall connected to an edge of the top surface and an edge of the bottom surface. The control unit includes a control board arranged in the casing and a power supply circuit arranged in the casing and supplying power to the control board. A first opening is formed in the first portion closer to the top surface than the bottom surface of the housing. The control unit is further disposed at a lower portion of the top surface in the housing, and has one end in contact with the end surface near the top surface of the first opening or the inner surface of the housing adjacent to the end surface, and the first opening to the housing. A first plate-like member having an other end provided to extend from the power supply circuit to a position crossing at least a part of the projection line on the top surface toward the inside; and the top surface and the first surface The distance between each part of the plate-like member is formed so as to increase monotonically as a function of the distance from the first opening to each part, thereby at least part of the air heated by the power supply circuit. A first guide member that leads to the first opening is included.

  A control unit casing according to a second aspect of the present invention has a top surface and a bottom surface, and side walls connected to the edge portion of the top surface and the edge portion of the bottom surface, and defines the inside and the outside. A control unit housing for accommodating control circuit components therein, and a first opening is formed in a first portion closer to the top surface than the bottom surface of the housing. The control unit casing is further disposed at a lower portion of the top surface in the casing, and has an end face close to the top face of the first opening or one end in contact with the inner face of the casing adjacent to the end face, and the first opening. The first plate-like member having the other end arranged at a position extending to a predetermined length from the inside to the inside of the housing, and between the top surface and each part of the first plate-like member Of the air is monotonically increased as a function of the distance from the first opening to each of the parts, whereby at least part of the air heated by the control circuit components arranged in the control unit is A first guide member leading to the one opening.

  ADVANTAGE OF THE INVENTION According to this invention, the control unit which can discharge | emit efficiently the heat which generate | occur | produced in the control unit outside without reducing the intensity | strength of a housing | casing, and the housing | casing for control units can be provided.

  Other objects, configurations, and effects of the present invention will become apparent from the following description of embodiments of the present invention and the accompanying drawings.

FIG. 1 is a perspective view of a control unit according to the prior art. FIG. 2 is a cross-sectional view of the control unit shown in FIG. FIG. 3 is a cross-sectional view of the control unit shown in FIG. FIG. 4 is a cross-sectional view of the control unit according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view of the control unit shown in FIG. FIG. 6 is a sectional view of a control unit according to the second embodiment of the present invention. FIG. 7 is a sectional view of a control unit according to the third embodiment of the present invention. FIG. 8 is a sectional view of a control unit according to the fourth embodiment of the present invention. FIG. 9 is a cross-sectional view of a control unit according to the fifth embodiment of the present invention. FIG. 10 is a cross-sectional view of the control unit shown in FIG. 9 in the direction of arrow 10-10.

[Description of Embodiment of the Present Invention]
In the following description and drawings, the same parts are denoted by the same reference numerals. Therefore, detailed description thereof will not be repeated. Note that at least a part of the embodiments described below may be arbitrarily combined.

  A control unit according to a first aspect of the present invention includes a top surface and a bottom surface, and a housing that defines an interior and an exterior, having a side wall connected to an edge of the top surface and an edge of the bottom surface. And a control board arranged in the casing, and a power supply circuit arranged in the casing and supplying power to the control board. A first opening is formed in the first portion closer to the top surface than the bottom surface of the housing. The control unit is further disposed at a lower portion of the top surface in the housing, and has one end in contact with the end surface near the top surface of the first opening or the inner surface of the housing adjacent to the end surface, and the first opening to the housing. A first plate-like member having an other end provided to extend from the power supply circuit to a position crossing at least a part of the projection line on the top surface toward the inside; and the top surface and the first surface The distance between each part of the plate-like member is formed so as to increase monotonically as a function of the distance from the first opening to each part, thereby at least part of the air heated by the power supply circuit. A first guide member that leads to the first opening is included.

  The air generated by the heat generation of the power supply circuit is guided by the first guide member and is discharged to the outside through the first opening. Even if no opening is provided on the top surface, the heated air inside the housing can be efficiently exhausted to the outside, so that it is possible to prevent the control board inside the housing from being adversely affected by heat generation.

  Preferably, the first guide member is formed so as to cross all the projection lines from the power supply circuit to the top surface.

  Most of the air generated by the heat generation of the power supply circuit is guided by the first guide member and discharged to the outside through the first opening. Even if no opening is provided on the top surface, most of the heated air inside the housing can be efficiently exhausted to the outside, so that it is possible to prevent adverse effects due to heat generation on the control board in the housing.

  More preferably, at least a part of one end of the first guide member extends from the first opening to the outside of the housing to form an eaves portion.

  At the installation location, the foreign matter falling from the upper part of the control unit stays in the eaves part or falls from the eaves part to the outside. The risk of foreign matter entering the housing of the control unit can be reduced, and the risk of adversely affecting the control board in the housing can be reduced.

  More preferably, the edge of the other end of the first guide member is in contact with the inner surface of the side wall and facing the first portion.

  Since the other end of the first guide member is in contact with the inner surface of the side wall, the air heated by the power supply circuit is efficiently captured by the first guide member, and is guided to the first opening and discharged. As a result, since most of the heated air inside the housing can be efficiently exhausted outside without providing an opening on the top surface, it is possible to prevent the control board in the housing from being adversely affected by heat generation.

  Preferably, a second opening is formed in the second portion of the side wall opposite the first portion. The control unit is further disposed at a lower portion of the top surface in the housing, and has one end contacting the end surface near the top surface of the second opening or the inner surface of the housing adjacent to the end surface, and the other end of the first guide member. A plate-like second guide member having the other end connected thereto. The second guide member is formed such that the distance between the top surface and each part of the second guide member increases monotonously as a function of the distance from the second opening to each part, and thereby the power supply circuit. At least a part of the air heated by is guided to the second opening.

  In addition to the first opening, a second opening is provided. Further, the second guide member is provided, and the air heated by the power supply circuit in the housing is guided to the second opening, and can be efficiently discharged to the outside. As a result, even if no opening is provided on the top surface, most of the heated air inside the housing can be efficiently exhausted to the outside through the first and second openings, so that the control board in the housing is adversely affected by heat generation. Can be prevented.

  More preferably, the other end of the first guide member and the other end of the second guide member are connected to form a convex linear ridge line on the bottom surface side.

  The 1st guide member and the 2nd guide member are joined so that a ridgeline may be formed. Compared with the case where the inside of the housing is covered only with the first guide member, the first and second guide members can be inclined more greatly. As a result, the air heated by the power supply circuit can be efficiently guided to the first and second openings by the first and second guide members, and discharged from the first and second openings to the outside. Therefore, it is possible to prevent the control board in the housing from being adversely affected by heat generation.

  More preferably, the distance from the ridge line to the first opening is equal to the distance from the ridge line to the second opening.

  By the first and second guide members, the air heated by the heat generated by the power supply circuit can be uniformly guided to the first and second openings and discharged from the first and second openings to the outside. Therefore, it is possible to prevent the control board in the housing from being adversely affected by heat generation.

  Preferably, the distance from the ridge line to the first opening and the distance from the ridge line to the second opening are different from each other.

  By setting the position of the ridge line according to the arrangement of the power supply circuit, the path where the air heated by the heat generation of the power supply circuit is discharged in the area where the power supply circuit is arranged and the heat generation in the other areas is relatively small It is possible to separate the route from which the air of the part is discharged. As a result, it is possible to prevent the heated air from circulating in the portion where the heat generation is small, and it is possible to prevent the control board provided in such a region from being adversely affected by the heat generation of the power supply circuit.

  More preferably, the control board and the power supply circuit are arranged in different regions on the plane inside the housing, and the different regions are separated from each other by a linear boundary region, and the projection line from the ridge line to the bottom surface However, the position of the ridgeline is determined so as to cross the boundary region of the plane.

  The area where the power supply circuit is arranged and the area where the control board is arranged are divided, and the ridge line between the first guide member and the second guide member is located on the area where the power supply circuit is arranged. By setting the position of the ridge line in this way, a path through which the air heated by the heat generation of the power supply circuit is exhausted in the area where the power supply circuit is arranged, and a part of the air that generates relatively little heat in the other areas. It is possible to separate from the discharge route. As a result, it is possible to prevent the heated air from circulating in the portion where the heat generation is small, and it is possible to prevent the control board provided in such a region from being adversely affected by the heat generation of the power supply circuit.

  More preferably, the casing has a rectangular parallelepiped shape, and the top surface and the bottom surface have a rectangular shape with both short sides and long sides facing each other.

  The shape of the housing is the same as that of the conventional housing, and it can be manufactured and packed using the same equipment as the conventional housing.

  Preferably, the side wall includes a pair of first side plates parallel to the long side and a pair of second side plates parallel to the short side, and the first opening is one of the pair of first side plates. Is formed.

  By forming the first opening in one of the first side plates parallel to the long side, the width of the first opening can be increased, and the air heated in the housing can be efficiently discharged to the outside.

  More preferably, the side wall includes a pair of first side plates parallel to the long side and a pair of second side plates parallel to the short side, the first opening of the pair of second side plates. It is formed on one side.

  By providing the first opening on the side plate on the short side, the strength of the housing is not reduced so much even if the height of the first opening is increased. Therefore, by making the height of the first opening relatively large, the air heated in the housing can be efficiently discharged to the outside.

  More preferably, the casing has a rectangular parallelepiped shape, and the top surface and the bottom surface each have a rectangular shape having a long side and a short side facing each other, and the side wall is a pair of first parallel to the long side. And a pair of second side plates parallel to the short side, the first opening is formed in one of the pair of first side plates, and the second opening is a pair of first side plates. The other is formed.

  Openings are formed in both of the pair of first side plates facing each other. The area of the opening for discharging air from the inside of the housing to the outside increases, and the air heated in the housing can be efficiently discharged to the outside.

  Preferably, an opening is formed in one of the pair of first side plates so as to surround at least a part of a figure vertically projected from the power supply circuit onto one of the pair of first side plates.

  Air for cooling is sucked from this opening, and the power supply circuit can be efficiently cooled.

  More preferably, an opening is formed in the other of the pair of first side plates so as to surround at least a part of a figure vertically projected from the power supply circuit to the other of the pair of first side plates.

  The air heated by the power supply circuit can be forcibly exhausted from the opening, and the temperature in the housing can be prevented from rising.

  A control unit casing according to a second aspect of the present invention has a top surface and a bottom surface, and side walls connected to the edge portion of the top surface and the edge portion of the bottom surface, and defines the inside and the outside. A control unit housing for accommodating control circuit components therein, and a first opening is formed in a first portion closer to the top surface than the bottom surface of the housing. The control unit casing is further disposed at a lower portion of the top surface in the casing, and has an end face close to the top face of the first opening or one end in contact with the inner face of the casing adjacent to the end face, and the first opening. The first plate-like member having the other end arranged at a position extending to a predetermined length from the inside to the inside of the housing, and between the top surface and each part of the first plate-like member Of the air is monotonically increased as a function of the distance from the first opening to each of the parts, whereby at least part of the air heated by the control circuit components arranged in the control unit is A first guide member leading to the one opening.

  Air generated by heat generated in the circuit disposed in the housing is guided by the first guide member and discharged to the outside through the first opening. Even if no opening is provided on the top surface, the heated air inside the housing can be efficiently exhausted to the outside, so that it is possible to prevent the control board inside the housing from being adversely affected by heat generation.

[Details of the embodiment of the present invention]
Specific examples of the control unit and the control unit casing according to the embodiment of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by a claim, and is intended that all the changes within the meaning and range equivalent to a claim are included.

<First Embodiment>
4 and 5, the control unit 150 according to the first embodiment of the present invention has a casing 152 having the same configuration as that of the conventional control unit 50 shown in FIGS.

  More specifically, the casing 152 has a rectangular parallelepiped shape as a whole. Specifically, the bottom surface 82 has a rectangular shape, and is arranged at a position where the bottom surface 82 is translated up to a predetermined distance in a direction perpendicular to the bottom surface. And the front surface 62, the back surface 64, the right side surface 66, and the left side surface 68 disposed so as to connect the corresponding sides of the bottom surface 82 and the top surface 84 to each other. These all form a rectangular parallelepiped side plate of the casing 152. In particular, the front surface 62 and the back surface 64, and the right side surface 66 and the left side surface 68 each form a pair of side plates.

  Similar to FIGS. 1 to 3, a control circuit 94, a power supply circuit 90 for supplying power to the control circuit 94, a control circuit 96, and a power supply to the control circuit 96 are provided on the bottom surface 82 inside the control unit 150. A power supply circuit 92, a terminal block 98, and a control circuit 100 are disposed. A region where the power supply circuits 90 and 92 and the control circuits 94 and 96 are provided and a region where the terminal block 98 and the control circuit 100 are provided are partitioned by a partition plate 102.

  The regions corresponding to the regions of the projection figure obtained by the vertical projection from the power supply circuits 90 and 92 on the right side surface 66 and the left side surface 68 are respectively filled with the inlets 76 and 76 so as to surround at least a part of the projection region. An exhaust port 78 is formed. A fan (not shown) for cooling the power supply circuits 90 and 92 is provided at a position near the intake port 76 of the power supply circuits 90 and 92. The intake air 120 by these fans cools the power supply circuit 90 and the power supply circuit 92, and the heated exhaust 122 is discharged to the outside through the exhaust port 78.

  The control unit 150 is different from the control unit 50 shown in FIGS. 1 to 3 in that a guide member 160 is provided in a lower portion of the top surface 84 inside the housing 152. In particular, referring to FIG. 5, guide member 160 has an area that covers power supply circuits 90 and 92, control circuit 94, and control circuit 96 among various circuits provided in housing 152. It consists of a rectangular plate-shaped member. That is, the guide member 160 has a shape that crosses all the vertical projection lines from the control circuit 94 and the control circuit 96 to the top surface 84. As shown in FIG. 5, the guide member 160 has a size indicating approximately half of the planar shape inside the housing 152.

  With reference to FIGS. 4 and 5, the guide member 160 is disposed in the housing 152 such that the end portion on the left side surface 68 side is in contact with the inner surface of the left side surface 68. More specifically, the lower edge portion of the end portion on the left side surface 68 side of the guide member 160 is in contact with the inner edge portion of the upper end surface of the opening 80 formed in the left side surface 68, that is, the left side of the guide member 160. A guide member 160 is fixed to the left side surface 68 so that there is no gap between the end portion on the surface 68 side and the upper end surface of the opening 80. At this time, the other part of the end surface of the guide member 160 is in contact with the inner surface of the casing 152 adjacent to the inner edge of the upper end surface of the opening 80. Further, the guide member 160 is configured such that the height of each part of the guide member 160 decreases as the distance from the opening 80 of the left side surface 68 increases, that is, the distance between each part of the guide member 160 and the top surface 84 is set to the left side surface 68. That is, it is inclined so as to increase monotonously as a function of the distance from the opening 80 to each part. The other short side of the guide member 160 is fixed to the inner side surface of the right side surface 66. That is, the other short side of the guide member 160 is lower than the one short side. However, the guide member 160 is installed in the housing 152 so as not to interfere with a circuit or the like disposed inside the housing 152.

  Such an arrangement produces the following effects. That is, at least a part of the air heated from the power supply circuit 92 and the like and not exhausted from the exhaust port 78 rises inside the housing 152. Since a guide member 160 is provided at the upper part of the power supply circuit 92, as shown by an arrow 162 in FIG. 4, such air is guided toward the opening 80 by the guide member 160 and escapes from the opening 80 to the outside. . Heated air does not stay at least in the upper part of the power supply circuit 92, and the inside of the housing 152 can be prevented from becoming so high that it adversely affects the control circuit 94 and the control circuit 96. The end surface of the guide member 160 opposite to the opening 80 is fixed to the inner surface of the housing 152. Therefore, the guide member 160 can efficiently capture the rising air. Further, the guide member 160 is firmly fixed to the casing 152, and the risk of the guide member 160 dropping off can be reduced.

  In the cross section shown in FIG. 4, the lower edge portion of the end surface on the opening 80 side of the guide member 160 is in contact with the inner edge portion of the upper end surface of the opening 80, and the other portion of the end surface is on the inner edge portion of the opening 80. A guide member 160 is disposed so as to be in contact with the inner surface of the adjacent casing 152. However, the arrangement of the guide member 160 with respect to the opening 80 is not limited to this. Any arrangement may be used as long as no gap is generated between the end of the guide member 160 and the upper end face of the opening 80. For example, the end on the opening 80 side of the guide member 160 may enter the inside of the opening 80, and the upper surface thereof or the upper edge of the end of the guide member 160 may be in contact with the upper end surface of the opening 80.

  In the first embodiment, the guide member 160 covers only the power supply circuit 90 and the power supply circuit 92 side, and does not cover the area where the terminal block 98 and the control circuit 100 are provided. However, of course, the guide member 160 may cover the entire interior of the housing 152.

  In the above embodiment, the guide member 160 has a shape that crosses all the vertical projection lines from the control circuit 94 and the control circuit 96 to the top surface 84. However, the present invention is not limited to such an embodiment. Even if the shape is such that only a part of the vertical projection line from the control circuit 94 and the control circuit 96 to the top surface 84 is crossed, a certain effect can be obtained. However, in order to actually operate effectively, it is desirable that the guide member 160 crosses at least about 80% of the vertical projection lines from the control circuit 94 and the control circuit 96 to the top surface 84.

<Second Embodiment>
In the first embodiment, the end of the guide member 160 on the left side 68 side is located inside the opening 80 or inside the housing 152. However, the present invention is not limited to such an embodiment. An end portion of the guide member 160 may protrude outward from the opening 80 of the left side surface 68 to form an eaves portion. The control unit 180 according to the second embodiment shown in FIG. 6 has such a feature.

  With reference to FIG. 6, the control unit 180 according to the second embodiment includes a housing 182. The case 182 differs from the case 152 shown in FIGS. 4 and 5 in that the end on the left side surface 68 side protrudes from the opening 80 to the outside instead of the guide member 160 shown in FIGS. 3 and 4. The guide member 190 that forms the eaves 192 is included. At least a part of the upper surface of the guide member 190 is in contact with the upper end surface of the opening 80. In other respects, the housing 182 is the same as the housing 152 shown in FIGS.

  The control unit 180 employing the housing 182 has the following effects. In other words, the presence of the eaves 192 causes the foreign matter falling from the upper part to stay on the eaves 192 or to jump out of the eaves 192 and fall. As a result, the possibility that a foreign substance enters the inside of the housing 182 is lower than that in the case of the first embodiment.

  In this control unit 180, at least a part of the air heated by the power supply circuit 90 and the power supply circuit 92 is guided toward the opening 80 by the guide member 190, and is efficiently discharged from the opening 80 to the outside. This is the same as the first embodiment.

<Third Embodiment>
In the first and second embodiments, the length of the guide member reaches from the left side surface 68 to the right side surface 66. However, in this case, if the guide member is arranged so as not to interfere with the components arranged inside the housing, the inclination of the guide member is limited, and an arrangement with an inclination of a certain size or more can be taken. There may not be. On the other hand, generally, the larger the inclination of the guide member, the more efficiently the convection air can be guided to the opening. Therefore, it is desirable to arrange the guide member so that the inclination of the guide member can be made steeper.

  Referring to FIG. 7, a control unit 210 according to the third embodiment of the present invention includes a housing 212 having substantially the same shape as the housing 182 of the control unit 180 according to the second embodiment. The housing 212 is different from the housing 182 in that it includes a right side surface 220 having an opening 222 formed at a position substantially opposite to the opening 80 as well as the air inlet 76 instead of the right side surface 66 of FIG. is there. In other respects, the housing 212 is the same as the housing 182.

  The control unit 210 is further different from the control unit 180 according to the second embodiment in that, instead of the guide member 190 shown in FIG. 6, one end protrudes outward from the opening 80 to form an eaves portion 230 and the other end Includes a guide member 224 fixed to the housing 212 so as to protrude outward from the opening 222 to form an eaves portion 232. The distance between the left guide member 226 forming the left half of the guide member 224 and the top surface 84 increases as the distance from the left side surface 68 to each part of the left guide member 226, that is, the distance from the opening 80 increases. That is, the distance between the top surface 84 and the upper surface of the left guide member 226 is formed so as to increase monotonously as a function of the distance from the opening 80. On the other hand, the right guide member 228 forming the right half of the guide member 224 has a greater distance from the top surface 84 as the distance from the right side 220 to each part of the right guide member 228, that is, the distance from the opening 222 increases. In other words, the distance between the top surface 84 and the upper surface of the right guide member 228 is monotonously increased as a function of the distance from the opening 222. The left guide member 226 and the right guide member 228 are joined so as to form a convex ridge line 234 toward the lower side, that is, the bottom side, at an intermediate point between the left side surface 68 and the right side surface 220.

  The control unit 210 is otherwise the same as the control unit 180 according to the second embodiment.

  In addition to the effects of the control unit 180 according to the second embodiment, the control unit 210 according to the third embodiment has the following effects. That is, the slopes of the left guide member 226 and the right guide member 228 that form the guide member 224 are both steeper than the slope of the guide member 190 of FIG. 6, and not only the opening 80 but also the opening 222 is formed. Therefore, the air heated by the power supply circuit 92 or the like is efficiently guided to the opening 80 and the opening 222 as shown by the left arrow 236 and the right arrow 238, and is discharged to the outside from the opening 80 and the opening 222. Air having heat inside the housing 212 is efficiently discharged to the outside. The inside of the housing 212 can be prevented from becoming high temperature, and the risk of adversely affecting the operation of the control circuit can be reduced. In addition, since the eaves portions 230 and 232 are provided in the portions of the opening 80 and the opening 222, it is possible to reduce the risk that foreign matter enters the inside of the control unit 210 from the opening 80 or the opening 222. Note that it is desirable to make the opening 80 and the opening 222 small in order to prevent the strength of the housing 212 from decreasing.

<Fourth Embodiment>
In the third embodiment shown in FIG. 7, the ridge line 234 of the guide member 224 is at an intermediate point between the left side surface 68 and the right side surface 220. However, the present invention is not limited to such an embodiment. Usually, it is considered that the configuration in which the ridge line comes to an intermediate point as in the third embodiment is the configuration that can discharge the heated air most efficiently. However, depending on the circuit arrangement in the housing, it may be considered that changing the position of the ridgeline can efficiently exhaust the heated air. Therefore, the ridgeline may be at any position in the housing.

  Referring to FIG. 8, the control unit 250 according to the fourth embodiment includes a housing 252. The housing 252 has a structure similar to that of the housing 212 illustrated in FIG. However, the control unit 250 differs from the housing 212 shown in FIG. 7 in the following points.

  As shown in FIG. 8, an intermediate region 268 having a linear planar shape with a certain width exists between the control circuit 96 and the power supply circuit 92. The control unit 250 according to the fourth embodiment replaces the guide member 224 of FIG. 7 so that the vertical projection line from the ridge line to the bottom surface 82 crosses the intermediate region 268, that is, the projection figure from the ridge line to the bottom surface 82. 7 differs from the control unit 210 of FIG. 7 in that the guide member 260 having the ridge line 262 is provided at a position where the line segment is formed in the intermediate region 268. Similarly to the guide member 224 shown in FIG. 7, the guide member 260 has a left guide member 264 and a right guide member 266 that project outward from both of the opening 80 and the opening 222 to form an eaves portion.

  The left guide member 264 is formed such that the distance from the top surface 84 monotonously increases as a function of the distance from the opening 80. The right guide member 266 is formed such that the distance from the top surface 84 monotonously increases as a function of the distance from the opening 222. And both are joined by the edge part which both face so that the ridgeline 262 may be formed. A line obtained by vertical projection from the ridge line 262 to the bottom surface 82 is located in the intermediate region 268 as described above.

  In the fourth embodiment, the same effect as in the third embodiment can be obtained. Since the inclination of the right guide member 266 is slower than the inclination of the right portion of the guide member 224 in FIG. 7, the heat discharge efficiency may be slightly reduced. However, the relatively hot air rising from the power supply circuits 90 and 92 that generate heat in particular is guided by the right guide member 266 and discharged to the outside through the opening 222 as shown by the right arrow 272. Only a small part of such hot air flows to the left guide member 264 side. Further, the air in the region where the control circuit 96 is formed is guided by the left guide member 264 having a steep slope as shown by the left arrow 270 and is efficiently discharged from the opening 80 to the outside. As a result, it is possible to reduce the possibility that hot air enters the space on the control circuit 94 and 96 side that is easily affected by high heat. Therefore, the risk of adversely affecting the control circuit can be reduced.

<Fifth Embodiment>
In the first to fourth embodiments, the guide member is inclined between the left side surface 68 and the right side surface 66 (that is, between the side surfaces having the air supply port and the exhaust port for forced exhaust). However, the present invention is not limited to such an embodiment. The guide member may be inclined between the front surface 62 and the back surface 64.

  However, in this case, if the distance between the front face 62 and the rear face 64 is longer than the distance between the right side face 66 and the left side face 68, the inclination of the guide member becomes loose, and there is a risk that the efficiency of exhaust heat will deteriorate. is there. The control unit according to the fifth embodiment has a configuration that does not reduce the efficiency of exhaust heat as much as possible even in the case described above.

  With reference to FIGS. 9 and 10, a control unit 300 according to the fifth embodiment includes a housing 302. The housing 302 includes a front surface 312, a back surface 314, a right side surface 316, a left side surface 318, a bottom surface 320, and a top surface 322. As can be seen from FIG. 9, the distance between the front surface 312 and the back surface 314 is longer than the distance between the right side 316 and the left side 318. In such a case, if the opening 324 is formed just below the top surface 322 of the back surface 314 and the guide member is inclined at the whole from the back surface 314 to the front surface 312, the inclination is loosened and heated. The exhaust efficiency of air becomes worse. Therefore, in this embodiment, as shown in FIG. 10, the guide member 330 is formed so as to cover only the region where the power circuits 90 and 92 that generate heat most easily are arranged, from the back surface 314 to the partition plate 102. The guide member 330 is arranged inside the housing 302 so that the end of the guide member 330 on the side opposite to the back surface 314 is high enough to leave the upper portion of the partition plate 102 and the gap 326. Also in the case of this guide member 330, the distance between the guide member 330 and the top surface 322 increases monotonously as a function of the distance from the opening 324. In this guide member 330 as well, the end on the opening 324 side protrudes outward from the opening 324 to form an eaves portion 332.

  In this embodiment, the air heated by the heat generated by the power supply circuits 90 and 92 is guided to the opening 324 by the guide member 330 and is quickly discharged from the opening 324. In the area not covered by the guide member 330, only parts that do not generate much heat, such as the terminal block 98 and the control circuit 100, are placed. Therefore, there is a low possibility that the heat generated in the housing 302 is trapped. Since the guide member 330 extends only to the central portion of the housing 302, even when the guide member 330 is arranged so that the lowest position of the guide member 330 does not interfere with other components, the guide member 330 does not need to be inclined so much. Therefore, the heat generated by the power supply circuits 90 and 92 is efficiently guided to the opening 324 by the guide member 330 and discharged.

  As described above, according to the present invention, the exhaust port is provided in the upper part of the side surface of the casing, and the guide member that efficiently guides the air heated by the heat generated by the electrical components to the exhaust port is provided. Therefore, there is an effect that it is possible to reduce the risk that heat is trapped inside the housing and to prevent the control board from being adversely affected by the heat generated by the electrical components. In addition, the position of the exhaust port is determined so that it can be efficiently exhausted according to the arrangement of components inside the housing, and a guide member with an appropriate inclination can be provided to further increase the efficiency of air discharge, which can adversely affect the control board. Can be prevented.

  The embodiment disclosed this time is merely an example, and the present invention is not limited to the above-described embodiment. The scope of the present invention is indicated by each claim in the scope of claims after taking into account the description of the detailed description of the invention, and all modifications within the meaning and scope equivalent to the wording described therein are included. Including.

50, 150, 180, 210, 250, 300 Control unit 60, 152, 182, 212, 252, 302 Case 62, 312 Front 64, 314 Back 66, 220, 316 Right side 68, 318 Left side 70 Breaker 72, 74, 98 Terminal block 76 Intake port 78 Exhaust port 80, 222, 324 Opening 82, 320 Bottom surface 84, 322 Top surface 90, 92 Power supply circuit 94, 96, 100 Control circuit 102 Partition plate 120 Intake 122 Exhaust 124, 162 Arrow 192 230, 232, 332 Eaves 226, 264 Left guide member 228, 266 Right guide member 234, 262 Ridge line 236, 270 Left arrow 238, 272 Right arrow 160, 190, 224, 260, 330 Guide member 268 Middle region 326 Gap

Claims (16)

A housing having a top surface and a bottom surface, and an edge portion of the top surface and a side wall connected to the edge portion of the bottom surface, and defining the inside and the outside;
A control board disposed in the housing;
A control unit that is disposed in the housing and includes a power supply circuit that supplies power to the control board,
A first opening is formed in a first portion closer to the top surface than the bottom surface of the housing,
The control unit is further disposed at a lower portion of the top surface in the housing, and has an end surface close to the top surface of the first opening or an end in contact with the inner surface of the housing adjacent to the end surface; A first plate-like member having an other end provided so as to extend from the power supply circuit toward a position crossing at least a part of a projection line on the top surface from the opening of the housing toward the inside of the housing. And the distance between the top surface and each part of the first plate-like member is monotonically increased as a function of the distance from the first opening to each part, thereby A control unit including a first guide member that guides at least part of the air heated by the power supply circuit to the first opening. 2. The control unit according to claim 1, wherein the first guide member is formed so as to cross all projection lines from the power supply circuit to the top surface. 3. The control unit according to claim 1, wherein at least a part of the one end of the first guide member extends from the first opening to the outside of the housing to form an eaves portion. 4. . The edge part of the said other end of the said 1st guide member is an inner surface of the said side wall, Comprising: The contact surface of any one of Claims 1-3 which contact | connects the inner surface facing the said 1st part. Control unit as described. A second opening is formed in a second portion of the side wall that faces the first portion,
The control unit is further disposed at a lower portion of the top surface in the housing, and has an end surface close to the top surface of the second opening or an end contacting the inner surface of the housing adjacent to the end surface; A plate-like second guide member having the other end connected to the other end of the one guide member,
The second guide member is formed such that the distance between the top surface and each part of the second guide member monotonously increases as a function of the distance from the second opening to each part, 4. The control unit according to claim 1, wherein at least part of the air heated by the power supply circuit is guided to the second opening. 5. The other end of the first guide member and the other end of the second guide member are connected so as to form a convex linear ridge line on the bottom surface side. Control unit. The control unit according to claim 6, wherein a distance from the ridge line to the first opening and a distance from the ridge line to the second opening are equal to each other. The control unit according to claim 6, wherein a distance from the ridge line to the first opening and a distance from the ridge line to the second opening are different from each other. The control board and the power supply circuit are arranged in different regions on a plane inside the housing, and the different regions are separated from each other by a linear boundary region,
The control unit according to claim 8, wherein the position of the ridge line is determined such that a projection line from the ridge line to the bottom surface crosses the boundary region of the plane. The said housing | casing is a rectangular parallelepiped shape, The said top surface and the said bottom face are mutually opposing rectangular shapes, and each is a rectangular shape which has a short side and a long side. Controller unit. The side wall includes a pair of first side plates parallel to the long side and a pair of second side plates parallel to the short side,
The control unit according to claim 10, wherein the first opening is formed in one of the pair of first side plates. The side wall includes a pair of first side plates parallel to the long side and a pair of second side plates parallel to the short side,
The control unit according to claim 10, wherein the first opening is formed in one of the pair of second side plates. The housing has a rectangular parallelepiped shape,
Both the top surface and the bottom surface have a rectangular shape with long sides and short sides facing each other,
The side wall includes a pair of first side plates parallel to the long side and a pair of second side plates parallel to the short side,
The first opening is formed in one of the pair of first side plates,
The control unit according to any one of claims 5 to 9, wherein the second opening is formed in the other of the pair of first side plates. The one of the pair of first side plates is formed with an opening so as to surround at least a part of a figure vertically projected from the power supply circuit onto the one of the pair of first side plates. 14. The control unit according to 13. The other of the pair of first side plates is formed with an opening so as to surround at least a part of a figure vertically projected from the power supply circuit to the other of the pair of first side plates. 14. The control unit according to 14. A control unit housing having a top surface and a bottom surface, and an edge portion of the top surface and a side wall connected to the edge portion of the bottom surface, and defining a control circuit component inside the interior and exterior. Body,
A first opening is formed in a first portion closer to the top surface than the bottom surface of the housing,
The control unit housing is further disposed at a lower portion of the top surface in the housing, and is in contact with an end surface of the first opening close to the top surface or an inner surface of the housing adjacent to the end surface. And a first plate member having a second end disposed at a position extending to a predetermined length from the first opening toward the inside of the housing, and the top surface and the first surface The control unit is formed such that a distance between each part of the plate-like member of the first plate monotonously increases as a function of a distance from the first opening to the respective parts, and is thereby arranged in the control unit. A control unit casing, comprising: a first guide member that guides at least part of the air heated by the circuit component to the first opening.

Images