ELECTRICAL BOX HAVING A REMOVABLE MODULE WITH A CHARGING CONNECTOR
This invention disclosure is an electrical outlet receptacle containing the high voltage AC side and low voltage DC power supply used typically for charging and/or powering portable electronic devices. The charge connector for interfacing with the portable device is contained in a removable module. Furthermore the removable module may contain a retractable charge cord or charge cords, charge status indicator lights, power supply switches, and it also may contain a portion of the power supply control circuitry to provide the particular power and signaling required to interface with the specific portable device. The other portion of the power supply and control circuitry would be contained in the fixed portion of the receptacle and/or the electrical box. Finally there may be additional heat sinks to provide enough thermal dissipation from the power supply.
Not Applicable
BACKGROUND OF THE INVENTION1. Field of the Invention
The present application is related to an AC electrical receptacle containing charging connectors for portable electronic devices where said charging portion of the electrical receptacle can be easily upgradable to future portable electronic device charging and power standards by use of a removable module.
2. Technical Background
The past several years has seen a proliferation of portable electronic devices. Smart phones, tablets, laptops, game pads, cameras, portable lights, and electronic toys to name a few. One commonality amongst all these portable electronic devices is the need to recharge their respective batteries. Several strategies by portable electronic device manufactures for charging said batteries have been removable batteries and a charging adapter which plug into an AC high voltage wall electrical receptacle, a charging adapter with proprietary plug to attach to the portable electronic device, a charging adapter with standardized plug such as micro USB to attach to the portable electronic device for charging, and inductive charging pad to wirelessly charge the portable electronic device while in close proximity to the portable electronic device. The drawback of all these approaches is the adapter and charge cord required. Adapters and charge cords have the down side of easily being lost by the user, incompatibility between one adapter and a different portable electronic device, incompatibility between the adapter and future similar portable electronic devices, and safety issue of the ‘wall wart’ style adapter being easy to bump and partially expose the high voltage prongs.
Inventors have come up with solutions which address some concerns but not all. Current state of the art approaches include electrical receptacles containing USB type A connector or connectors and an associated low voltage switching power supply used for powering the USB type A plugs. However that technology implementation does not eliminate the issue of requiring a charge cord to connect from the USB plug in the electrical receptacle to the portable electronic device. These charge cords can easily be lost. Another issue is unsightliness if one keeps the charge cord plugged into the electrical receptacle at all times. Furthermore current technology implementations do not address future compatibility where the portable electronic device may require different power or signaling requirements. Current technology does not address the safety issue of young children attempting to plug wires into outlets—a young child may not distinguish between the USB type A socket and high voltage AC socket.
Other proposed inventions include a retractable charge cord inside the electrical receptacle. However since the charge cord is part of the electrical receptacle and not part of a removable module, the electrical receptacle will not work with portable electronic devices with different style charge connectors. Since all electrical receptacles are ‘hard wired’ to a building's high voltage wiring and replacing it may require a municipal electrical permit and an electrician to perform the work, both which are costly and time consuming. Also the future compatibility issue remains where even if the same plug style is included in future portable electronic devices, the power requirement and signaling protocol required by the portable electronic device may be different. Furthermore, retractable charge cords can easily break if one pulls on them with excessive force rendering the electrical receptacle broken and an expensive electrician service call to replace said electrical receptacle.
Another drawback with current electrical receptacles with built in low power supplies is the limited amount of low voltage DC power said electrical receptacle can provide due to thermal constraints. Power supplies have two inherent constraints. First, no power supply is 100% efficient and the un-efficient portion of the power is converted into heat which must be dissipated by the electrical receptacle. Second, there is a limited amount of heat which can be dissipated inside a wall electrical box. For example, an 80% efficiency 100 Watt power supply would need to dissipate 25 Watts which exceeds the power dissipation capability of a traditional electrical box while remaining within industry standards of acceptable temperatures within said electrical box.
Hence there is a need for an invention which solves the aforementioned issues of appearance, safety, upgradability to future charging standards, repair of components of limited life span, and thermal limitations.
3. Background Art
U.S. Pat. No. 8,758,031 “Electrical wiring device with high current USB charging capabilities”
SUMMARY OF THE INVENTIONThe present invention addresses the preceding detailed needs and provides the electrical receptacle with a removable module containing the charging connector or connectors and provides for improved thermal dissipation.
One embodiment of the present invention is a retractable charge cord or plurality of retractable charge cords contained in the removable module. The removable module may contain indicator lights which indicate charging status. A switch may be provided to disable the indicator lights. The removable module may also contain a switch (e.g., phantom power switch) for deactivating the switching power supply thus cutting phantom power usage to zero while the charger is not in use. The phantom power switch may be a standalone switch or it may be built into the retractable charge cord, such that when the charge cord is fully retracted, the switch is deactivated. The phantom power switch may also be partially contained in the fixed portion of the electrical receptacle and partially contained in the removable module. The high voltage electrical portion of the phantom power switch would be contained in the fixed portion and a push lever or other apparatus for toggling the phantom power switch would be embedded in the removable module. The push lever is activated by the charge cord being fully retracted or by a toggle or button switch.
Another aspect of this invention is low voltage control circuitry contained in the removable module where the control circuitry is used to control the non-removable portion of the AC high voltage power supply such that the desired power—voltage and amperage—is generated from the fixed AC high voltage power supply and that signaling appropriate for the targeted portable electronic device is presented on the charging connector and can be used to communicate with the targeted portable electronic device in order to determine the desired power amount and type. One embodiment of this control circuitry can meet the USB power delivery 2.0 specification which includes a signaling protocol to switch the output voltage and amperage from the default of 5V to higher voltage and higher amperage. This control circuitry connects from the removable module to the fixed portion of the AC high voltage power supply by any electrical connector readily apparent to those skilled in the art.
Yet another aspect of this invention is means of providing additional thermal dissipation from the electrical receptacle through a thermal bridge. A heat sink is attached to or is part of the electrical box which houses the electrical receptacle. A thermal bridge connection is provided between the portions of the switching AC high voltage power supply which generates the majority of the waste heat, typically this is the flyback transformer, the high voltage switching transistor, and the output diodes. Some power supply incarnations may also include a buck regulator. This buck regulator and associated transistor switch or switches are other examples of components in the AC high voltage power supply which produces significant waste heat and could be attached to the thermal bridge. A thermal bridge has several embodiments which are detailed in the figures below and of which would be apparent to those skilled in the art.
Another embodiment of the present invention is that the high voltage portion of the AC high voltage power supply is contained in the electrical box rather than in the electrical receptacle itself. Housing the high voltage AC portion in the electrical box is done to allow for more physical space and more thermal dissipation than would be possible by housing it in the electrical receptacle alone. The invention then allows for multiple removable modules to be attached to a single fixed portion of the AC high voltage power supply, which saves money in manufacturing and end-user installation due to the lower requirement of power supply units.
References are made to the section lines in the accompanying drawings. Where possible, the same section line is used in multiple figures where the same item is referred to in the different figures.
The described invention consists of several main parts. The first main part is the removable module (1). The second main part is the electrical receptacle (6). Finally the electrical box (14) and AC high voltage power supply (12) are necessary components to make a complete system.
The removable module (1) typically would be constructed of an insulating plastic material similar to that used in existing electrical receptacles. The removable module (1) contains the charge connector (2). The charge connector (2) can be a micro-usb connector, usb type c connector, other standards based connector or a proprietary connector specific to a particular product such as a Dell laptop power connector. The removable module (1) can be swapped out for another removable module with a different charge connector based on the type of portable electronic device connector that is required for the portable electronic device to be charged. These can be interchanged without disturbing the fixed electrical receptacle (6). Also the removable module (1) may contain more than one charge connector (2) as depicted in
Inside the removable module (1) there consists several sub-systems as shown in
The electrical receptacle (6), also called the fixed module (6) shown in
The electrical receptacle (6) may be multi-functional and may contain features found in traditional electrical receptacles. Some examples, while not an exhaustive list are a 15A 120V electrical socket (7) shown in
The electrical box (14) shown in
Claims
1.-15. (canceled)
16. An electrical assembly comprising:
- an electrical box;
- an AC high voltage connector in the electrical box and being electrically coupled with an AC high voltage power supply; and
- an electrical receptacle located in the electrical box, the electrical receptacle having a cavity;
- a removable module removably located in the cavity, the removable module comprising: at least one charge connector configured to couple with an electronic device; a removable module power supply electrically coupled to the at least one charge connector; and a DC low voltage electrically connector configured to electrically couple the removable module power supply with the AC high voltage power supply when the removable module is in the cavity.
17. The electrical assembly of claim 16, comprising a means for fastening the removable module to the electrical receptacle.
18. (canceled)
19. The electrical assembly of claim 16, wherein the AC high voltage connector is attached to the electrical receptacle.
20. The electrical assembly of claim 16, comprising the AC high voltage power supply in the electrical box.
21. The electrical assembly of claim 19, wherein the AC high voltage power supply is in the electrical receptacle.
22. The electrical assembly of claim 16, comprising the AC high voltage power supply external to the electrical box.
23. The electrical assembly of claim 16, wherein the removable module further includes at least one charge cord having the at least one charge connector.
24. The electrical assembly of claim 23, wherein the removable module includes a retractor mechanism attached to the at least one charge cord such that the charge cord is extendable from and retractable into the removable module.
25. The electrical assembly of claim 24, wherein the retractor mechanism includes a locking mechanism.
26. The electrical assembly of claim 24, wherein the locking mechanism includes a pull-to-release mechanism.
27. The electrical assembly of claim 24, wherein the locking mechanism includes a release button.
28. The electrical assembly of claim 20, further comprising a phantom power switch in the electrical box that electrically couples and decouples an external power supply to the AC high voltage power supply.
29. The electrical assembly of claim 24, comprising a means for activating and deactivating the phantom power switch.
30. The electrical assembly of claim 24, further comprising a phantom power switch in the electrical box that electrically couples and decouples an external power supply to the AC high voltage power supply, wherein the phantom power switch is operably coupled to the retractor mechanism such that when the charging cord is extended therefrom the external power supply is electrically coupled to the AC high voltage power supply or when the charging cord is retracted the external power supply is electrically decoupled from the AC high voltage power supply.
31. The electrical assembly of claim 28, the removable module including a button operably coupled to the phantom power switch.
32. The electrical assembly of claim 16, wherein the removable module power supply includes control circuitry and power conversion and switching components configured to convert voltage coming out of the AC high voltage power supply into power indicated by the control circuitry.
33. The electrical assembly of claim 21, wherein the removable module power supply includes control circuitry configured to communicate with the portable electronic device to be charged to determine power amount and type for a portable electronic device.
34. The electrical assembly of claim 16, wherein the removable module further includes an indicator light configured to specify an amount of electricity provided to the portable electronic device.
35. The electrical assembly of claim 20, further comprising a heat sink coupled with the AC high voltage power supply via a thermal bridge.
36. The electrical assembly of claim 16, wherein the electrical receptacle further includes a high voltage electrical socket.
Type: Application
Filed: Jul 30, 2015
Publication Date: Feb 2, 2017
Inventors: Sebastian H Ziesler (Park City, UT), Alexandra Ziesler (Park City, UT)
Application Number: 14/813,477