Device for wireless transmission of electrical energy
A device for wireless transmission of electrical energy to an energy receiver, including a support surface, on which the energy receiver is arranged during energy transmission. The device includes an induction coil for transmitting electrical energy and an air duct extending within the device from an opening formed in the support surface into the device. The opening is arranged over the induction coil. The air duct is routed through a winding of the induction coil, which is preferably arranged directly under the support surface. Advantageously, the support surface is essentially rectangular, and the opening is formed on or at least close to a longitudinal axis of the support surface and is formed at a distance from an edge of the support surface. At least one projection is formed on the support surface for holding the receiving unit at a distance from the support surface so that air conducted into the air duct can better flow underneath.
1. A device for wireless transmission of electrical energy to an energy receiver, comprising: a support plate, on which the energy receiver is arrangeable during the energy transmission; at least one induction coil for the transmission of the electrical energy; a carrier for holding the induction coil, comprising a recess, wherein the carrier and the support plate are arranged on opposite sides of the induction coil; and at least one air duct comprising walls extending within the device from an opening formed in the support plate and arranged over the induction coil into the device, wherein the walls of the air duct extend perpendicularly downward from the opening and pass through an open area provided in a winding of the induction coil and through the recess so that the air duct is closed at least in an area in which the air duct extends from the opening in the support plate, through the induction coil and through the recess of the carrier, wherein the recess is aligned with the open area.
2. The device according to claim 1 , wherein the induction coil is arranged directly under the support surface.
3. The device according to claim 1 , further comprising a carrier for holding the induction coil, the carrier having a recess through which the air duct extends.
4. The device according to claim 3 , wherein the carrier is a carrier plate.
5. The device according to claim 1 , wherein the support surface is essentially rectangular and the opening is formed on or at least close to a longitudinal axis of the support surface.
6. The device according to claim 1 , wherein the opening is formed at a distance from an edge of the support surface.
7. The device according to claim 6 , wherein the opening is formed at a distance at least 1.5 cm from the edge of the support surface.
8. The device according to claim 6 , wherein the opening is formed at a distance at least 2 cm from the edge of the support surface.
9. The device according to claim 1 , further comprising a turbomachine for generating an air flow in the air duct, the turbomachine being configured to forming the air flow in a direction from the support surface into the air duct.
10. The device according to claim 1 , further comprising means for directing air conducted through the air duct toward the induction coil and/or at least one further electrically operated component.
11. The device according to claim 10 , wherein the air duct is additionally closed in an area in which the air duct extends past the further electrically operated component.
12. The device according to claim 1 , wherein the air duct extends into an outlet area of the device through which liquid entering the device can flow out of the device.
13. The device according to claim 1 , wherein at least one projection is formed on the support surface so as to hold the receiving unit at a distance from the support surface so that air to be conducted into the air duct flows underneath.
14. The device according to claim 13 , wherein the projection comprises at least one fin and/or nub.
15. The device according to claim 1 , wherein the device is configured as a component of a passenger compartment interior.
16. The device according to claim 15 , wherein the device is configured for arrangement at a center console, an interior door trim, in a glove compartment, at a dashboard, and/or at a back side of a backrest of a seat of the passenger compartment interior.
17. A built-in unit of a passenger compartment of a vehicle, comprising a device according to claim 1 .
18. A vehicle, comprising a device according to claim 1 .
19. A method for wireless transmission of electrical energy to an energy receiver, comprising the steps of: arranging the energy receiver on a support plate for purposes of energy transmission; transmitting the electrical energy with aid of at least one induction coil; holding the induction coil with a carrier having a recess, wherein the carrier and the support plate are arranged on opposite sides of the induction coil; and moving air for cooling the energy receiver and/or the induction coil through at least one air duct comprising walls extending within the device from an opening formed in the support plate and arranged over the induction coil into the device, wherein the walls of the air duct extend perpendicularly downward from the opening and pass through an open area provided in a winding of the induction coil and through the recess so that the air duct is closed at least in an area in which the air duct extends from the opening in the support plate, through the induction coil and through the recess of the carrier, wherein the recess is aligned with the open area.