This application claims priority to Chinese Application number 202011090526.5, filed on Oct. 13, 2020, which is incorporated herein by reference.
The present disclosure relates to the field of electrical appliances, in particular to a socket and a door with the same.
At present, relays are widely used to control the power output in smart socket. When the contacts of relays are under load, sparks may occur at the moment of attraction or release. Under the condition of heavy load, this is very likely to cause contact melting, which may lead to relay adhesion and failure, and affect the service life of the whole smart socket.
Therefore, there is a need for an improved smart socket.
In view of the above-mentioned shortcomings, the technical problem to be solved by one or more embodiments of this disclosure is to prevent the switching device in the smart socket from having sparks at the moment of attraction or release.
According to some aspects of the present disclosure, a socket is provided, including: an input terminal configured to be electrically connected to an AC power source; an output terminal configured to output an AC signal; a switch circuit electrically connected between the input terminal and the output terminal; a step-down circuit electrically connected to the input terminal and configured to reduce the amplitude of the AC signal; a shaping circuit electrically connected to the step-down circuit and configured to convert the AC signal with reduced amplitude into a shaped signal; and a control circuit electrically connected to the shaping circuit and the switch circuit and configured to control the switch circuit based on the shaping signal to enable the switch circuit to perform switching operation only when the AC signal is at zero potential.
According to some aspects of the present disclosure, a door is provided, including: a door frame for fixing to a wall; a door body connected to the door frame by a hinge to enable the door body to pivot between an open position and a closed position relative to the door frame; and a socket, the socket including: an input terminal configured to be electrically connected to an AC power source; an output terminal configured to output an AC signal; a switch circuit electrically connected between the input terminal and the output terminal; a step-down circuit electrically connected to the input terminal and configured to reduce the amplitude of the AC signal; a shaping circuit electrically connected to the step-down circuit and configured to convert the AC signal with reduced amplitude into a shaped signal; and a control circuit electrically connected to the shaping circuit and the switch circuit and configured to control the switch circuit based on the shaping signal to enable the switch circuit to perform switching operation only when the AC signal is at zero potential.
In addition, the above summary does not enumerate all the essential features of the present disclosure. In addition, sub-combinations of these feature groups may also constitute inventions.
In order to explain the technical solutions in the disclosure, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some exemplary embodiments of the disclosure. For those skilled in the art, other drawings may be obtained according to these drawings without creative labor.
The following description provides the specific disclosure scenarios and requirements of this disclosure in order to enable those skilled in the art to make or use the contents of this disclosure. Various modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and s without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the illustrated embodiments, but is to be accorded the widest scope consistent with the claims.
In this disclosure, the term “outside” refers to the outside of an enclosed space formed by a door mounted to a wall in a closed state, and the term “inside” refers to the inside of an enclosed space formed by a door mounted to a wall in a closed state. Outside the house may also be called outdoor, and inside the house may also be called indoor.
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In some embodiments, the socket 100 may further include a first phase detection circuit and a second phase detection circuit. The first phase detection circuit may be electrically connected to the gate of the NMOSFET M1 and configured to detect the phase of the AC signal. The second phase detection circuit may be electrically connected to the drain of the NMOSFET M1 and configured to detect the phase of the shaped signal. The first phase detection circuit and the second phase detection circuit may be electrically connected to the control circuit 60 to send the detected phase data to the control circuit 60. In some embodiments, the first phase detection circuit and the second phase detection circuit may be part of the control circuit 60.
The control signal includes a first trigger edge and a second trigger edge, the first trigger edge is used for triggering the contact of the relay to attract, and the second trigger edge is used for triggering the release of the contact of the relay, the appearance time of the first trigger edge is determined according to the zero crossing time of the AC signal, the transition time of the shaped signal and the attracting transition time of the relay, the appearance time of the second trigger edge is determined according to the zero crossing time of the AC signal, the transition time of the shaped signal and the release transition time of the relay. The first trigger edge may be a rising edge or a falling edge. The second trigger edge may be a rising edge or a falling edge. For example, when the contact of relay J1 is a normally open contact, the first trigger edge may be a rising edge and the second trigger edge may be a falling edge. For example, when the contact of relay J1 is normally closed, the first trigger edge may be a falling edge and the second trigger edge may be a rising edge.
As shown in
Tx1=n×z−a−b,
where Ty1 is the delay time between the first trigger edge and the rising edge of the shaped signal, a is the time between the zero crossing time of the AC signal from negative half cycle to positive half cycle and the rising edge time of the shaped signal in the positive half cycle, z is the half cycle of the AC signal, b is the attracting transition time of the relay, and n is a positive integer.
It may be seen that by selecting the delay amount of the first trigger edge of the control signal relative to the rising edge of the shaping signal, the relay J1 may be near the zero potential (e.g., 180° phase point) of the AC signal at the moment of attracting, thus avoiding arc discharge and protecting the relay from damage.
As shown in
Ty1=n×z+a−b,
where Ty1 is the delay time between the first trigger edge and the falling edge of the shaped signal, a is the time between the zero-crossing time of the AC signal from negative half-cycle to positive half-cycle and the rising edge time of the shaped signal in the positive half-cycle, z is the half-cycle of the AC signal, b is the attract transition time of the relay, and n is a positive integer.
It may be seen that by selecting the delay amount of the first trigger edge of the control signal relative to the falling edge of the shaping signal, the relay J1 may be near the zero potential (e.g., 0° phase point) of the AC signal at the moment of attraction, thus avoiding the arc discharge phenomenon and protecting the relay from damage.
As shown in
Tx2=n×z−a−c,
where Tx2 is the delay time of the second trigger edge compared with the rising edge of the shaped signal, a is the time between the zero-crossing time of the AC signal from negative half cycle to positive half cycle and the rising edge time of the shaped signal in the positive half cycle, z is the half cycle of the AC signal, c is the release transition time of the relay, and n is a positive integer.
It may be seen that by selecting the delay amount of the second trigger edge of the control signal relative to the rising edge of the shaping signal, the relay J1 may be near the zero potential (e.g., 180° phase point) of the AC signal at the moment of release, thus avoiding arc discharge and protecting the relay from damage.
As shown in
Ty2=n×z+a−c,
where Ty2 is the delay time between the second trigger edge and the falling edge of the shaped signal, a is the time between the zero-crossing time of the AC signal from negative half-cycle to positive half-cycle and the rising edge time of the shaped signal in the positive half-cycle, z is the half-cycle of the AC signal, c is the release transition time of the relay, and n is a positive integer.
It may be seen that by selecting the delay amount of the second trigger edge of the control signal relative to the falling edge of the shaping signal, the relay J1 may be near the zero potential (e.g., 0° phase point) of the AC signal at the moment of release, thus avoiding the arc discharge phenomenon and protecting the relay from damage.
It should be noted that one or more of the above embodiments take the case where the contact of relay J1 is normally open and the actuation level is high as an example. For the case where the contact is normally closed and the actuation level is low, the high level and the low level of the control signal are mutually switched. This technical scheme should also fall within the protection scope of this disclosure.
As shown in
The door frame 210 is used for fixing to a wall. The door frame 210 may include four sides, namely a first side, a second side, a third side and a fourth side. The first side may be opposite to the second side, and the third side may be opposite to the fourth side. The first side faces outdoors, the second side faces indoors, the third side faces the door body 220 (when the door body 220 is in a closed position), and the fourth side faces a wall or is embedded in a wall. The door body 220 is hinged to the door frame 210 by a hinge 221 and may pivot between an open position (shown in
As shown in
The plug 230 may be oriented opposite to the socket 100 (i.e., facing the door frame 210) such that the connecting pin 231 of the plug 230 are inserted into the insertion hole 110 of the socket 100 when the door body 220 is in the closed position, and the connecting pin 231 of the plug 230 are disengaged from the insertion hole 110 of the socket 100 when the door body 220 is in the open position. In some embodiments, the positions of the plug 230 and the socket 100 may be interchanged, that is, the plug 230 may be arranged on the door frame 210 and the socket 100 may be arranged on the door body 220.
For a smart door, a surveillance device (e.g., a digital door viewer) is installed on the door body 220, and the monitoring device may be connected to a distribution box located in a wall through wires for power supply. In this case, the wire usually needs to pass through the door body 220, the door frame 210 and the wall. Because the door body 220 and the door frame 210 often move relatively, the wire often bends back and forth and is easily damaged. The connection mode of plug and socket may avoid the damage of wires due to frequent bending. In addition, plugs and sockets may be produced in a modular way, so it is easier to replace the plugs and sockets compared with wires.
In some embodiments, the socket 100 may also be provided with an insertion hole 110 on one side (e.g., the first side) of the door frame 210 facing the outside, so as to supply power to equipment outside the house. For example, when the user is accidentally locked out of the door and the cell phone is about to run out of power while waiting for other family members to open the door, it may be charged through the insertion hole facing the outside. For another example, when a user comes home from work and needs to charge his electric bicycle at night, wiring from inside to outside may cause the door to be unable to close, and there is a potential safety hazard at night. This problem may be perfectly solved through the insertion hole facing outside.
In some embodiments, the socket 100 may also be provided with an insertion hole 110 on one side (e.g., the second side) of the door frame 210 facing the room, so as to supply power to equipment in the room.
As shown in
The door frame 310 is used for fixing to a wall. The door body 320 is hinged to the door frame 310 by a hinge 321 and may pivot between an open position and a closed position relative to the door frame 310. The socket 330 may be buried in the door frame 310 and may be electrically connected to the distribution box 600 located on the wall to take electricity from the distribution box 600. The first wireless power transmission device 340 may be set on the door frame 310 and electrically connected to the socket 330. The second wireless power transmission device 350 may be set on the door body 320.
The first wireless power transmission device 340 and the second wireless power transmission device 350 may be configured such that when the door body 320 is in a closed position, the first wireless power transmission device 340 is closely attached to the second wireless power transmission device 350 for wireless power transmission, and when the door body 320 is in an open position, the first wireless power transmission device 340 is separated from the second wireless power transmission device 350, thereby interrupting the wireless power transmission.
As shown in
The door frame 410 is used for fixing to a wall. The door body 420 is hinged to the door frame 410 by a hinge (not shown) and may pivot between an open position and a closed position relative to the door frame 410. The socket 430 may be set on a side of the door frame 410 facing the lock 440 (when the door body 420 is in a closed position) and may be electrically connected to the distribution box 600 located on the wall. The lock 440 may be set on the door body 420. The lock 440 may include a bolt 441 and a bolt driving device. The bolt 441 may be made of a conductive material. The socket 430 includes an insertion hole, and the size of the bolt 441 is designed to match the insertion hole of the socket 430.
The bolt 441 and the socket 430 are configured such that when the door body 420 is in the closed position, the bolt 441 is aligned with the insertion hole of the socket 430.
The bolt driving device may be configured to drive the bolt 441 to move linearly to enter and electrically contact the insertion hole when the bolt 441 is aligned with the insertion hole of the socket 430. The bolt driving device may include a driving motor, a worm gear and a worm. The driving motor is configured to perform rotary motion, the worm gear and the worm are used for converting the rotary motion of the output shaft of the driving motor into linear motion.
The lock 440 may be a smart lock, which may be charged through the electrical connection between the socket 430 and the bolt 441. The smart lock may also be configured to receive power from the distribution box 600 only when the door body 420 is in the closed position.
In summary, after reading this detailed disclosure, those skilled in the art may understand that the foregoing detailed disclosure may be presented by way of example only and may not be restrictive. Although not explicitly stated here, those skilled in the art will understand that this disclosure is intended to cover various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by this disclosure and are within the spirit and scope of the exemplary embodiments of this disclosure.
Number | Date | Country | Kind |
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202011090526.5 | Oct 2020 | CN | national |
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