JP5860291B2 - Coil unit installation structure - Google Patents

Description

  The present invention relates to an installation structure for a coil unit, and more particularly to an installation structure for installing a coil unit including a coil and a case for housing the coil.

  In recent years, a non-contact power supply device that supplies power to, for example, an electric vehicle battery without mechanical contact such as a cable has been developed and put into practical use. This non-contact electric power feeder is comprised from the power receiving side coil mounted in the vehicle, and the electric power feeding side coil installed in the parking space where a vehicle parks. According to such a non-contact power feeding device, the vehicle is parked in the parking space, and AC power is supplied to the power feeding side coil in a state where the power receiving side coil and the power feeding side coil face each other with an interval therebetween in the axial direction. Then, the AC power is received by the power receiving coil in a non-contact manner by electromagnetic induction or magnetic field resonance.

  In the non-contact power feeding apparatus described above, heat is generated in the coil, and it is necessary to cool it. As such a cooling device for cooling the coil, for example, the one shown in FIG. 6 has been proposed (Patent Document 1). As shown in the figure, the cooling device 100 includes a cylindrical bobbin 101, a coil 102 wound around the outer peripheral wall of the bobbin 101, and a blower fan 103 provided in the bobbin 101. According to this cooling device 100, when the blower fan 103 is turned, air is introduced into the bobbin 101 from the axial opening of the bobbin 101 as indicated by an arrow 104, and then the air exhaust hole provided in the outer peripheral wall of the bobbin 101. 105 is exhausted from the bobbin 101.

  The coil 102 described above is generally accommodated in a case 106. For this reason, since air is introduced from the axial opening of the bobbin 101 with the above-described configuration, it is necessary to provide the inlet 107 on the lid (or bottom surface) of the case 106. However, if the air inlet 107 is provided in the lid of the case 106, it is necessary to increase the distance between the power receiving side coil and the power feeding side coil, and there is a possibility that the power feeding efficiency may be lowered. There is also a problem that the dustproof and waterproof properties are not good. Therefore, it is conceivable to connect a duct hose to the air inlet 107 so that water and dust do not enter the case 106, but the thickness direction of the cooling device 100 increases.

  In order to solve this problem, for example, as shown in FIG. 7A, it is conceivable to provide an intake port 107 and an exhaust port 108 on the outer peripheral wall of the case 106 along the winding direction of the coil 102. In this non-contact power supply device, in order to efficiently introduce and discharge air into the case 106 and to improve waterproof and dustproof properties, as shown in FIG. Both of them are connected to the fan box 110 via duct hoses 109, respectively. As a result, when the fan built in the fan box 110 rotates, cooling air is sent from the intake port 107 through the duct hose 109, and warmed air discharged from the exhaust port 108 is returned to the fan box 110. . In this case, it is necessary to embed two duct hoses 109 for intake and exhaust, and the construction range becomes large and large, resulting in high costs.

JP 2010-284011 A

  Then, this invention makes it a subject to provide the installation structure of the coil unit which aimed at the simplification of installation construction.

  The invention according to claim 1 for solving the above-described problem is a coil unit installation structure in which a coil unit including a coil and a case for housing the coil is installed, and the case is inclined with respect to a horizontal plane. Provided along the first inclined surface, and an outer peripheral wall of the case is provided with an intake port for introducing air into the case and an exhaust port for exhausting air outside the case, It exists in the installation structure of the coil unit characterized by being located in the inclination direction upper side of 1 inclined surface.

  The invention according to claim 2 resides in the coil unit installation structure according to claim 1, wherein the coil unit is installed in a parking space.

  The invention according to claim 3 is characterized in that the first inclined surface is a parking surface, and the case is embedded in a recessed embedding hole provided in the parking surface. It exists in the installation structure of the coil unit.

  According to a fourth aspect of the present invention, a bottom surface forming the buried hole is provided on a second inclined surface inclined with respect to a horizontal plane, and a drain outlet is provided on a lower side in the inclination direction of the second inclined surface. The present invention resides in the coil unit installation structure according to claim 3.

  A fifth aspect of the present invention resides in the coil unit installation structure according to any one of the first to fourth aspects, wherein a dustproof filter is provided at the exhaust port.

  As described above, according to the first aspect of the present invention, the exhaust port is provided on the upper side in the inclination direction of the first inclined surface, so that the exhaust port and the fan box are not connected by the duct hose. Even when the coil is cooled, the overheated air is smoothly exhausted upward from the exhaust port. Moreover, since the water accumulated on the upper side of the case flows downward in the slope direction, waterproofness can be achieved. Thereby, the duct hose from the exhaust port can be omitted, and space saving and installation work can be facilitated.

  Since the coil unit is installed in the parking space, the installation work in the parking space can be facilitated.

  According to the invention described in claim 3, since the case is embedded in the recessed embedding hole provided in the parking surface, the exhaust port is provided by being positioned on the upper side in the inclination direction of the first inclined surface. Since it can be far away from the water accumulated in the buried hole, water does not enter from the exhaust port, and the waterproofness can be improved. In addition, since the air discharged from the exhaust port is discharged upward from the opening of the buried hole, the air in the case can be exhausted more efficiently.

  According to invention of Claim 4, since the bottom face which forms an embedding hole is provided in the 2nd inclined surface inclined with respect to the horizontal surface, and the drain outlet is provided in the inclination direction lower side of the 2nd inclined surface. The water accumulated in the buried hole can be drained efficiently.

According to the fifth aspect of the present invention, since the dustproof filter is provided at the exhaust port , the dustproof performance can be ensured even when the air blowing to the case is stopped, and the dust attached to the dustproof filter can be blown out of the case during the air blowing. In addition, the dust resistance can be improved.

It is sectional drawing which shows one Embodiment of the installation structure of the coil unit of this invention. It is explanatory drawing which shows one Embodiment of the non-contact electric power feeder incorporating the coil unit shown in FIG. It is the II sectional view taken on the line of FIG. It is explanatory drawing which shows the construction example of the electric power feeding side coil unit shown in FIG. It is the II-II line fragmentary sectional view of FIG. It is sectional drawing which shows an example of the cooling device of the conventional coil. It is sectional drawing which shows an example of the cooling device of the conventional coil.

Hereinafter, the installation structure of the coil unit of this invention is demonstrated with reference to FIGS. The installation structure of the coil unit shown in FIG. 1 is an installation structure for installing the power supply side coil unit 4 constituting the non-contact power supply device 1 shown in FIG. 2 in a parking space. First, before explaining the installation structure of the coil unit, the non-contact power feeding device 1 will be explained. As shown in FIG. 2, the non-contact power feeding device 1 includes a power feeding side coil unit 4 installed on a parking surface 3 of a parking space of a vehicle 2 and a power receiving side coil unit 5 mounted on the vehicle 2. Yes.

  The power supply side coil unit 4 includes a coil 6 to which AC power is supplied, a resonance coil 7 electromagnetically coupled to the coil 6, and a case 8 that houses the coil 6 and the resonance coil 7. The power receiving side coil unit 5 includes a resonance coil 9 that electromagnetically resonates with the resonance coil 7, a coil 10 that is electromagnetically coupled to the resonance coil 9, and a case (not shown) that houses the resonance coil 9 and the coil 10. Yes. The coils 6 and 10 are provided by bending a belt-shaped metal plate into a loop shape. The resonance coils 7 and 9 are provided by bending a band-shaped metal plate in a spiral shape.

According to the above-described contactless power supply device 1, as shown in FIG. 2 , when the vehicle 2 stops on the parking space 3 and the resonance coils 7 and 9 face each other, the resonance coils 7 and 9 electromagnetically resonate with each other. Thus, power can be supplied from the power feeding side coil unit 4 to the power receiving side coil unit 5 in a non-contact manner.

  More specifically, when AC power is supplied to the coil 6, the power is sent to the resonance coil 7 by electromagnetic induction. When power is sent to the resonance coil 7, the power is sent wirelessly to the resonance coil 9 due to magnetic field resonance. Further, when electric power is sent to the resonance coil 9, the electric power is sent to the coil 10 by electromagnetic induction and supplied to a load connected to the coil 10.

  Next, details of the case 8 constituting the above-described power supply side coil unit 4 will be described. As shown in FIG. 5, the case 8 includes a bottomed cylindrical main body 8 a that houses the coil 6, the resonance coil 7, and a support member (not shown) that supports the coils 6 and 7, and a main body. A lid portion 8b that covers the opening of the portion 8a and a ring-shaped rubber sponge 8c provided between the main body portion 8a and the lid portion 8b are provided.

The main body 8a is made of a conductive material such as metal, and includes a disc-shaped bottom wall 8a-1, an outer peripheral wall 8a-2 standing from the periphery of the bottom wall 8a-1, and an outer peripheral wall 8a-. 2 and a flange wall 8a-3 projecting inwardly from the end of the two. The bottom wall 8 a-1 is orthogonal to the axial direction of the coil 6 and the resonance coil 7, and the outer peripheral wall 8 a-2 is erected along the winding direction of the coil 6 and the resonance coil 7. As shown in FIG. 3 , the outer peripheral wall 8 a-2 is provided with an intake port 8 a-4 for introducing air into the case 8 and an exhaust port 8 a-5 for exhausting air outside the case 8. ing. The intake port 8a-4 and the exhaust port 8a-5 are provided at positions facing each other on the outer peripheral wall 8a-2. As shown in FIG. 4, the intake port 8 a-4 is connected to the fan box 13 via a duct hose 12. In FIG. 1, the duct hose 12 is omitted. The exhaust port 8a-5 is not connected to the fan box 13. In addition, a dustproof filter 11 is provided at the exhaust port 8a-5.

  As shown in FIG. 5, the lid portion 8b includes a disc-shaped upper wall 8b-1 that covers the opening of the main body portion 8a, and a standing wall 8b that stands from the peripheral edge of the upper wall 8b-1 toward the main body portion 8a. -2. This standing wall 8b-2 is overlapped with the flange wall 8a-3 of the main body 8a via the rubber sponge 8c. The rubber sponge 8c closes the gap between the main body portion 8a and the lid portion 8b, so that waterproof and dustproofing can be achieved.

  Next, an installation structure for installing the above-described power supply side coil unit 4 in a parking space will be described with reference to FIG. As shown in FIG. 1, the parking surface 3 as the first inclined surface is provided on an inclined surface inclined with respect to the horizontal plane, and is provided with a recessed embedding hole 14 for embedding the case 8. . The buried hole 14 is provided on an inclined surface whose bottom surface 14a (second inclined surface) is inclined with respect to a horizontal plane, and a drain port 15 is provided below the bottom surface 14a in the inclination direction. In the present embodiment, the parking surface 3 and the bottom surface 14a are inclined in directions opposite to each other.

The case 8 of the power supply side coil unit 4 is provided inclined along the parking surface 3 and is embedded in the embedded hole 14. In the present embodiment, the lid portion 8 b of the case 8 is installed so as to be flush with the parking surface 3. Further, the exhaust port 8 a-5 of the case 8 is provided on the upper side in the inclination direction of the parking surface 3, and the intake port 8 a-4 is provided on the lower side in the inclination direction of the parking surface 3. Specifically, the case 8 is installed on the installation table 16 installed on the bottom surface 14 a of the embedding hole 14 so as to be inclined at the same angle as the parking surface 3. The installation table 16 has a lower surface provided at the same inclination as the bottom surface 14 a and an upper surface provided at the same inclination as the parking surface 3.

  A lid 17 is provided at the opening of the buried hole 14 on the exhaust port 8a-5 side. The lid 17 is provided with a plurality of ventilation holes (not shown) so that the air discharged from the exhaust port 8a-5 can be discharged from the opening of the embedded hole 14 to the outside.

  Next, cooling of the power feeding side coil unit 4 will be described. When the fan in the fan box 13 is turned, the cooling air passes through the duct hose 12 and is introduced into the case 8 from the intake port 8a-4 as shown by the arrow in FIG. The cooling air introduced into the case 8 is heated as it is in the coil 6 and the resonance coil 7, proceeds straight upward, and is discharged from the exhaust port 8 a-5 to the embedded hole 14. The air discharged from the embedded hole 14 is discharged upward from the opening of the embedded hole 14. Further, a vent hole (not shown) of the lid body 17 is provided at a position away from the case 8 side so that water does not directly enter the exhaust port 8a-5.

  According to the installation structure of the coil unit described above, the exhaust port 8a-5 is provided on the upper side in the inclination direction of the parking surface 3, so that the exhaust port 15 and the fan box 13 are not connected by the duct hose. Even if the coil 6 and the resonance coil 7 are cooled, the overheated air is smoothly exhausted upward from the exhaust port. Moreover, since the water accumulated on the upper side of the case 8 flows downward in the slope direction, waterproofness can be achieved. Thereby, the duct hose from the exhaust port 8a-5 can be omitted, and space saving and installation work can be facilitated.

  Moreover, according to the installation structure of the coil unit mentioned above, since the electric power feeding side coil unit 4 is installed in the parking space, the installation construction to a parking space can be made easy.

  Moreover, according to the installation structure of the coil unit mentioned above, since the case 8 is embed | buried in the concave embedding hole 14 provided in the parking surface 3, the exhaust port 8a-5 is located in the inclination direction upper side of the parking surface 3. Since the exhaust port 8a-5 can be separated from the water accumulated in the buried hole 14, the water does not enter from the exhaust port 8a-5, and the waterproof property can be improved. it can. Moreover, since the air exhausted from the exhaust port 8a-5 is exhausted upward from the opening of the embedded hole 14, the air in the case 8 can be exhausted more efficiently.

  Moreover, according to the installation structure of the coil unit mentioned above, the bottom face 14a which forms the embedding hole 14 is provided in the inclined surface inclined with respect to the horizontal surface, and the drain port 15 is provided in the inclination direction lower side of the bottom face 14a. Therefore, the water accumulated in the buried hole 14 can be drained efficiently.

  Further, according to the installation structure of the coil unit described above, since the dustproof filter 11 is provided at the drain port 15, the dustproof performance can be ensured even when the ventilation to the case 8 is stopped, and the dust adhered to the dustproof filter 11 during the ventilation. Can be made to fly out of the case 8, so that the dustproofness can be improved.

  Moreover, according to embodiment mentioned above, although the case 8 was embed | buried in the embedding hole 14 provided in the parking surface 3, this invention is not limited to this. For example, the case 8 may be placed on the parking surface 3 that is inclined without providing the embedded hole 14 in the parking surface 3.

  Moreover, according to embodiment mentioned above, although the electric power feeding side coil unit 4 installed in a parking space was demonstrated, this invention is not limited to this. Similarly, the power receiving side coil unit 5 disposed in the vehicle 2 may be configured so that the case is provided obliquely and the discharge port is disposed above the inclination direction.

  Moreover, according to embodiment mentioned above, although the inlet port 8a-4 was located in the inclination direction lower side of the parking surface 3, this invention is not limited to this. In the present invention, the exhaust port 8a-5 only needs to be positioned on the upper side of the parking surface 3 in the inclination direction, and the position of the intake port 8a-4 is not limited.

  Moreover, according to embodiment mentioned above, although the strip | belt-shaped metal plate was bent and the coils 6 and 10 and the resonance coils 7 and 9 were provided, this invention is not limited to this. For example, a coil bobbin may be disposed in the case 8 and the coils 6 and 10 and the resonance coils 7 and 9 may be provided by winding the coil bobbin around the coil bobbin.

  In the above-described embodiment, the resonance type non-contact power feeding device 1 is used. However, the present invention is not limited to this, and the non-contact power feeding method may be an electromagnetic induction type. The coil unit 1 is not limited to non-contact power feeding, and may be applied to various devices as a single unit.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

3 Parking surface (first inclined surface)
4 Power supply coil unit (coil unit)
6 Coil 7 Resonance coil (coil)
8 Case 8a-2 Outer peripheral wall of the case 8a-4 Intake port 8a-5 Exhaust port 11 Dustproof filter 14 Buried hole 14a Bottom surface (second inclined surface)
15 Drainage port

Claims (5)

A coil unit installation structure for installing a coil and a coil unit provided with a case for accommodating the coil,
The case is provided along a first inclined surface inclined with respect to a horizontal plane;
The outer peripheral wall of the case is provided with an intake port for introducing air into the case and an exhaust port for exhausting air outside the case,
The coil unit installation structure, wherein the exhaust port is provided on the upper side in the inclination direction of the first inclined surface. The coil unit installation structure according to claim 1, wherein the coil unit is installed in a parking space. The first inclined surface is a parking surface;
The said case is embed | buried in the recessed embedding hole provided in the said parking surface. The installation structure of the coil unit of Claim 2 characterized by the above-mentioned. A bottom surface forming the embedded hole is provided on a second inclined surface inclined with respect to a horizontal plane;
The installation structure of the coil unit according to claim 3, wherein a drain outlet is provided on a lower side of the second inclined surface in the inclination direction. The dust outlet filter is provided in the said exhaust port. The installation structure of the coil unit of any one of Claims 1-4 characterized by the above-mentioned.

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