JP7119928B2 - Controller unit - Google Patents

Description

The present invention relates to a control unit, and more particularly to a control unit in which a control device is housed.

Conventionally, as this type of control unit, one that accommodates a control device (electrical device) has been proposed (see, for example, Patent Document 1). The control device controls a power transmitting device (coil unit) that wirelessly transmits power to a power receiving device mounted on the vehicle. In this unit, the control device and the power transmission device are housed in a housing and embedded in the floor of the parking space of the vehicle.

JP 2016-73018 A

By the way, in the case where the power transmission device and the control device are housed in separate units, the temperature inside the control unit housing the control device may rise. The causes of such a temperature rise include the influence of the environment of the installation location, such as heat generated by the control device and sunlight. If the temperature inside the control unit rises, the control device will be affected by heat, so it is desirable to provide some sort of cooling structure for the control unit. Such a cooling structure has a problem of efficiently cooling the inside of the control unit.

A main object of the control unit of the present invention is to improve the cooling efficiency inside.

The control unit of the present invention takes the following measures to achieve the above main objectives.

The control unit of the present invention comprises:
A control unit that houses a control device that controls a power transmission device that wirelessly transmits power to an on-vehicle power receiving device,
a heat sink in which cooling air flows;
a bracket that is attached to the control device on its front surface and has one surface of the heat sink attached to its back surface, and is integrally molded so that a part of the bracket protrudes outward from the one surface of the heat sink;
The gist is to provide

In the control unit of the present invention, a heat sink through which cooling air circulates inside, a control device is attached to the front surface, and one surface of the heat sink is attached to the back surface, and a part of the heat sink protrudes outward from the one surface of the heat sink. and an integrally molded bracket. Since the bracket is attached to the control device, more heat generated by the control device can be recovered. Also, since the bracket partially protrudes outward from one surface of the heat sink, more heat can be recovered from the air. Furthermore, since the bracket is integrally molded, the heat resistance is lower than that of a bracket composed of a plurality of members. In this way, the bracket, which collects more heat and has a low thermal resistance, exchanges heat with the cooling air flowing through the heat sink via the heat sink, so that the cooling efficiency in the control unit can be improved.

In such a control unit of the present invention, the bracket may have a shape in which a projecting portion projecting outward from the one surface of the heat sink is bent at a substantially right angle so as to be separated from the heat sink and cover a portion of the heat sink. By doing so, the contact area between the bracket and the air becomes larger, so that the bracket can recover more heat from the air, and the cooling efficiency in the control unit can be further improved.

Further, in the control unit of the present invention, the control device, the heat sink, and the bracket are accommodated and attached to a predetermined member with the longitudinal direction upright. A housing having an intake port formed at a lower portion thereof and an exhaust port formed at an upper portion thereof in the longitudinal direction; The bracket extends in the longitudinal direction, and the overhanging portions of the bracket are bent at substantially right angles at both ends in the longitudinal direction so as to be spaced apart from the heat sink and cover a portion of the heat sink. The projecting portion may have a non-bent shape so that the rest of the heat sink, excluding the portion, is not covered. Since the air trapped in heat between the both end portions of the bracket and the heat sink can be released at the intermediate portion of the bracket, the cooling efficiency can be further improved. In this case, the heat sink may have fins formed on the remaining portion. By doing so, the surface area of the heat sink that is in contact with the air is increased, so the cooling efficiency can be further improved.

1 is a schematic configuration diagram showing an outline of the configuration of a power supply system 10 including a control unit 20 as one embodiment of the present invention; FIG. 1 is a schematic diagram showing a schematic side view of a control unit 20 according to one embodiment of the present invention; FIG. FIG. 3 is a schematic view of the control unit 20 viewed from direction A in FIG. 2 ; FIG. 3 is a schematic diagram showing the outline of the control unit 20 as viewed from direction B in FIG. 2 ; FIG. 5 is a schematic diagram showing an outline of the appearance of the control unit 20 cut along the line A′A′ of FIG. 4 and with the lid body 27 removed; It is the schematic which shows the outline which looked the principal part of FIG. 5 from the C direction. FIG. 4 is a schematic cross-sectional view showing an outline of a cross section of the control unit 20 taken along line AA of FIG. 3 ; FIG. 4 is a schematic cross-sectional view showing an outline of a cross section of the control unit 20 taken along line BB of FIG. 3 ; FIG. 8 is a schematic cross-sectional view showing an outline of a cross section of the control unit 20 taken along line CC in FIG. 7; FIG. 8 is a schematic cross-sectional view showing an outline of a cross section of the control unit 20 taken along line DD in FIG. 7 ; FIG. 8 is a schematic cross-sectional view showing an outline of a cross section of the control unit 20 taken along line EE in FIG. 7; 4 is an explanatory diagram showing an example of main heat transport paths in the control unit 20; FIG. FIG. 3 is an explanatory diagram for explaining an outline of the air flow within the case 24; 4 is an explanatory diagram for explaining the outline of the flow of air introduced from an intake port 28; FIG. FIG. 11 is a configuration diagram showing an outline of the configuration of a heat sink 134 of a modified example;

Next, a mode for carrying out the present invention will be described using examples.

FIG. 1 is a schematic configuration diagram showing an overview of the configuration of a power feeding system 10 including a control unit 20 as one embodiment of the present invention. FIG. 2 is a schematic diagram showing a schematic side view of control unit 20 in accordance with one embodiment of the present invention. FIG. 3 is a schematic view of the control unit 20 viewed from direction A in FIG. FIG. 4 is a schematic view of the control unit 20 viewed from direction B in FIG. In FIG. 4, description of the wall W of FIGS. 2 and 3 is omitted for convenience of explanation. FIG. 5 is a schematic diagram showing an outline of the appearance of the control unit 20 cut along the line A'A' in FIG. 4 with the cover 27 removed. FIG. 6 is a schematic diagram showing the outline of the main part of FIG. 5 viewed from direction C. FIG. FIG. 7 is a schematic cross-sectional view showing an outline of a cross section of the control unit 20 taken along line AA in FIG. FIG. 8 is a schematic cross-sectional view of the control unit 20 taken along line BB in FIG. 8, illustration of the lid 27 of the case 24 is omitted. FIG. 9 is a schematic cross-sectional view of the control unit 20 cut along line CC in FIG. FIG. 10 is a schematic cross-sectional view showing an outline of a cross section of the control unit 20 taken along line DD in FIG. FIG. 11 is a schematic cross-sectional view of the control unit 20 taken along line EE in FIG. 6 to 11, the bracket BCK3 is hatched with oblique lines for convenience of explanation.

The power feeding system 10 includes a power receiving device 12, a power transmitting device 14, and a control unit 20, as shown in FIG.

The power receiving device 12 is mounted on a vehicle 1 having a motor and a battery (both not shown), as shown in FIG. The power receiving device 12 is configured to contactlessly receive power transmitted from the power transmitting device 14 and charge a battery mounted on the vehicle 1 with the power. It includes a capacitor and the like that form a resonance circuit together with the receiving coil.

As shown in FIG. 1, the power transmission device 14 is embedded in the ground of a parking space for the vehicle 1 such as a parking lot. The power transmitting device 14 is configured as a device that transmits power to the power receiving device 12 in a contactless manner, and includes a power transmitting coil arranged on a ferrite core, a capacitor that forms a resonance circuit together with the power transmitting coil, a household power source, and the like. 2 for supplying AC power of a predetermined frequency to the power transmission coil.

As shown in FIGS. 2 to 13, the control unit 20 includes a control device 22, a power supply device 23, a case 24, a cooling fan 32, a heat sink 34, and a bracket BCK3. It is attached to the wall W installed near the stop space 1 and is exposed to the sunlight from the sun S. The control device 22 , the power supply device 23 , the cooling fan 32 , the heat sink 34 and the bracket BCK3 are housed in the case 24 .

As shown in FIGS. 8 to 10, the control device 22 is configured as a controller that controls the power transmission device 14 illustrated in FIG. ) are installed. The control device 22 is attached to the bracket BCK3 while being supported by the support base 22a. Among the elements mounted on the control board, the element He, which becomes relatively hot, is directly attached to the heat sink 34 .

As shown in FIGS. 7, 8, and 11, the power supply device 23 is configured as a device for supplying AC power of a predetermined frequency, such as the household power supply 2 illustrated in FIG. 1, to the power transmission coil. Various elements constituting the power supply device 23 are mounted on a power supply board (not shown). The power supply device 23 is attached to the bracket BCK3 while being supported by the support base 23a.

As shown in FIGS. 2 to 4, the case 24 is made of resin in a flat shape as a whole. The case 24 includes a bottom portion 26 forming a bottom surface, and a lid body 27 forming a space for housing the control device 22 together with the bottom portion 26 . The bottom portion 26 has an intake port 28 formed in the lower portion thereof in the longitudinal direction Ld, and an exhaust port 30 formed in the upper portion thereof in the longitudinal direction Ld. The case 24 is attached to the wall W with the longitudinal direction Ld upright by means of brackets BCK1 and BCK2 attached to the upper and lower portions of the surface of the bottom portion 26 facing the wall W. As shown in FIGS. 1 to 4, a plurality of connectors C are attached to the lower surface of the case 24 in the longitudinal direction Ld for connecting wires from the household power supply 2 and wires from the power transmission device 14 illustrated in FIG. ing.

The cooling fan 32 is attached to the exhaust port 30 of the bottom portion 26 as shown in FIGS. Above the cooling fan 32 in the longitudinal direction Ld, as shown in FIGS. 2 and 3, a partition plate 33 is provided to prevent air from moving upward in the longitudinal direction Ld of the cooling fan 32 .

The heat sink 34 is arranged to form spaces S1 and S2 between the intake port 28 and the exhaust port 30, as shown in FIGS. As shown in FIGS. 6 and 9 to 11, the heat sink 34 has air guide paths 36a to 36g that serve as air flow paths. The air guide passages 36a to 36g extend in the longitudinal direction Ld and are arranged side by side in the lateral direction Sd perpendicular to the longitudinal direction Ld. Among the air guide passages 36a to 36g, the air guide passages 36c and 36d arranged in the central portion in the transverse direction Sd are arranged outside the air guide passages 36c and 36d. They are formed such that their lower ends in the vertical direction in FIG. 6 are aligned, and the height in the vertical direction in FIG. The heat sink 34 has projecting portions Ov1 to Ov4 projecting in the lateral direction Sd from the upper and lower ends of both side walls Sw1 and Sw2 in the lateral direction Sd in FIG. formed.

The bracket BCK3 is integrally molded to extend in the longitudinal direction Ld, as shown in FIG. As shown in FIGS. 6 and 9 to 11, the bracket BCK3 has an upper surface (front surface) attached to the support bases 22a and 23a by a fixture Fs, and a lower surface (rear surface) attached to the heat sink 34 by a fixture Fh. attached to the As shown in FIGS. 5, 9, and 11, the bracket BCK3 has, at the ends BCKT1 and BCKT3 in the longitudinal direction Ld, projecting portions projecting from the upper surface of the heat sink 34 to both sides in the lateral direction Sd are bent substantially at right angles. It has a shape that covers the heat sink 34 while being spaced apart from the heat sink 34 . As shown in FIGS. 5, 6, 7, 8, and 10, the connecting portion BCKT2 that connects the end portion BCKT1 and the end portion BCKT3 of the bracket BCK3 is provided on both sides of the upper surface of the heat sink 34 in the lateral direction Sd. 5, 6, and 10 is formed in a shape that does not cover the heat sink 34 without being bent.

Next, a heat transport path in the control unit 20 of the embodiment thus configured will be described. FIG. 12 is an explanatory diagram showing an example of main heat transport paths in the control unit 20. As shown in FIG. In the figure, solid arrows indicate heat transfer paths between directly connected members. A dashed arrow indicates a heat propagation path due to heat dissipation to the air inside the case 24 . A dashed-dotted arrow indicates the path of the air (cooling air) taken in from the intake port 28 . In the control unit 20 of the embodiment, the main heat sources are solar radiation from the sun S and heat generated by the elements of the control device 22 . When the cover 27 is warmed by solar radiation, the heat propagates through the path of the bottom 26, the bracket BCK3, and the heat sink . When the elements of the control device 22 generate heat, the heat propagates through the control board, the bracket BCK3, and the heat sink . Heat from the lid 27 , the control device 22 (elements and control board), and the bracket BCK 3 is radiated to the air inside the case 24 . The air in the control device 22 and the case 24 is cooled by the air (cooling air) introduced from the intake port 28 via the heat sink 34 and flowing through the heat sink 34 .

FIG. 13 is an explanatory diagram for explaining the outline of the air flow inside the case 24. As shown in FIG. In the figure, thick arrows schematically indicate the flow of air. In the case 24, the lid 27 is exposed to solar radiation from the sun S, and the bottom 26 is not exposed to solar radiation due to the walls W. Therefore, the surface P1 of the lid 27 exposed to the sun has the highest temperature, and the temperature of the surface of the lid 27 not exposed to the sun and the bottom 26 decrease in this order. Therefore, the temperature of the air in the case 24 rises more on the lid 27 side than on the bottom 26 side. The warmed air rises on the surface P1 side of the lid body 27, stays in the partition plate 33, and descends in the cold downward direction. At this time, since the temperature of the air on the surface P1 side of the lid body 27 is higher, the descending air tends to pass through the bottom portion 26 side and the sides in the short direction Sd of the heat sink 34 . Since the heat sink 34 is formed so that the cross section of the intermediate portion is U-shaped, the air passing through the sides in the lateral direction Sd of the heat sink 34 easily passes through the U-shaped intermediate portion. Therefore, heat exchange between the air outside the heat sink 34 and the cooling air inside the heat sink 34 is facilitated via the heat sink 34 . Thereby, the air in the case can be further cooled.

FIG. 14 is an explanatory diagram for explaining the outline of the flow of air (cooling air) introduced from the intake port 28. As shown in FIG. In the drawing, thick arrows indicate the flow of air introduced from the intake port 28 . In the control unit 20 of the embodiment, an intake port 28 is formed in the lower part of the bottom part 26 of the case 24 in the longitudinal direction Ld, and an exhaust port 30 is formed in the upper part in the longitudinal direction Ld. 32 is attached, and a heat sink 34 having air guide passages 36a to 36g extending in the longitudinal direction Ld between the intake port 28 and the exhaust port 30 is arranged. Spaces S1 and S2 are formed between the intake port 28, the exhaust port 30, and the heat sink 34, as shown in FIG. Therefore, the air introduced from the intake port 28 flows into the air guide passages 36a to 36g of the heat sink 34 after being diffused in the space S1. The air that has flowed into the air guide passages 36a to 36g of the heat sink 34 flows upward in the longitudinal direction Ld through the air guide passages 36a to 36g, and flows through the heat sink 34 into the control device 22, the power supply device 23, and the case 24. is introduced into the space S2 and discharged from the exhaust port 30. In the control unit 20, the air heated by the heat exchange is discharged from the bottom part 26, so that the air heated by the heat exchange can be suppressed from giving heat to the control device 22 and the power supply device 23 on the lid body 27 side. .

In the control unit 20 of the embodiment, since the bracket BCK3 is attached to the support bases 22a and 23a by the fixtures Fs, the heat of the control device 22 and the power supply device 23 supported by the support bases 22a and 23a can be recovered. can be done. Further, as illustrated in FIG. 5, the bracket BCK3 partially protrudes outside the upper surface of the heat sink 34, so that more heat can be recovered from the air. In addition, by covering the heat sink 34 with the ends BCKT1 and BCKT3, a larger area of the heat sink 34 is in contact with the air and more heat can be collected than when only one surface of the heat sink 34 is covered. Furthermore, since the bracket BCK3 is integrally molded, the heat resistance is smaller than that of a bracket made up of a plurality of members. By exchanging heat between the bracket BCK3, which collects more heat and has a low thermal resistance, and the cooling air flowing through the heat sink 34, the cooling efficiency can be improved.

According to the power supply system 10 including the control unit 20 of the embodiment described above, the heat sink 34 in which the cooling air flows, the upper surface (front surface) is attached to the control device 22, and the lower surface (back surface) is the upper surface of the heat sink 34. is attached to the heat sink 34, and the bracket BCK3 is integrally molded so that a part of the bracket BCK3 protrudes outward from the upper surface of the heat sink 34. Therefore, the cooling efficiency in the control unit 20 can be improved.

In the control unit 20 of the embodiment, the side walls Sw1 and Sw2 of the heat sink 34 are formed in a U-shape having overhanging portions OV1 to OV4. A plurality of fins Fin extending in the direction Sd may be formed. By doing so, the area of the heat sink 34 that is in contact with the air increases, so that the air inside the control unit can be further cooled.

In the control unit 20 of the embodiment, among the air guide passages 36a to 36g of the heat sink 34, the air guide passages 36c and 36d arranged in the central portion in the lateral direction Sd are connected to the air guide passage 36c. , 36d, and the lower ends in the vertical direction of FIGS. It is formed so that the height becomes lower and narrower in the vertical direction of FIGS. 9 to 11 . However, the air guide paths 36c and 36d may be formed to have the same size as the air guide paths 36a, 36b, 36c and 36d.

In the control unit 20 of the embodiment, the heat sink 34 has seven air guide paths 36a to 36g, but the number of air guide paths is not limited to seven and may be plural.

In the control unit 20 of the embodiment, the case 24 includes two members, the bottom portion 26 and the lid body 27, but the bottom portion 26 and the lid body 27 may be integrated as one member. .

The control unit 20 of the embodiment is attached to a wall W of a parking lot or the like, but is not limited to being attached to an outdoor wall W, and is attached to a predetermined member with the longitudinal direction Ld upright. All you have to do is

The correspondence relationship between the main elements of the embodiments and the main elements of the invention described in the column of Means for Solving the Problems will be described. In the embodiment, the heat sink 34 corresponds to the "heat sink" and the bracket BCK3 corresponds to the "bracket".

Note that the correspondence relationship between the main elements of the examples and the main elements of the invention described in the column of Means for Solving the Problems is the Since it is an example for specifically explaining the mode for solving the problem, it does not limit the elements of the invention described in the column of the means for solving the problem. That is, the interpretation of the invention described in the column of Means to Solve the Problem should be made based on the description in that column, and the Examples are based on the description of the invention described in the column of Means to Solve the Problem. This is only a specific example.

Although the embodiments for carrying out the present invention have been described above, the present invention is not limited to such embodiments at all, and can be modified in various forms without departing from the scope of the present invention. Of course, it can be implemented.

INDUSTRIAL APPLICABILITY The present invention is applicable to the manufacturing industry of control units and the like.

1 vehicle, 2 household power source, 10 power supply system, 12 power receiving device, 14 power transmission device, 20 control unit, 22 control device, 22, 23a support base, 23 power supply device, 24 case, 26 bottom, 27 lid, 28 intake Port, 30 exhaust port, 32 cooling fan, 33 partition plate, 34, 134 heat sink, 36a to 36g air guide path, BCK1 to BCK3 bracket, OV1 to OV4 overhang, P1 surface, S1, S2 space.

Claims (2)

A control unit that houses a control device that controls a power transmission device that wirelessly transmits power to an on-vehicle power receiving device,
a heat sink in which cooling air flows;
a bracket that is attached to the control device on its front surface and has one surface of the heat sink attached to its back surface, and is integrally molded so that a part of the bracket protrudes outward from the one surface of the heat sink;
with
The projecting portion of the bracket projecting outward from the one surface of the heat sink is bent substantially at a right angle and is separated from the heat sink so as to cover a portion of the heat sink.
Controller unit. The control unit of claim 1, comprising:
It accommodates the control device, the heat sink, and the bracket, and is attached to a predetermined member with the longitudinal direction upright. a housing in which an exhaust port is formed in the upper part in the longitudinal direction;
a cooling fan that blows air so as to exhaust the air in the housing;
with
the heat sink extends in the longitudinal direction;
The protruding portion of the bracket is bent substantially at right angles at both ends in the longitudinal direction to be separated from the heat sink and cover a portion of the heat sink. It is in an unbent shape so that the remainder is not covered
Controller unit.

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