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公开(公告)号：US20250004052A1
公开(公告)日：2025-01-02
申请号：US18347012
申请日：2023-07-05
Applicant: Chengli LI
Inventor： Chengli LI , Long CHEN
IPC: G01R31/327 , G01R31/52 , H02H1/04
Abstract: A leakage current detection and interruption (LCDI) device includes a leakage current detection module, including a first and a second leakage current detection line and at least one resistive element and/or at least one semiconductor element, configured to detect a leakage current signal on the first or second current-carrying line and to generate a leakage fault signal in response to detecting the leakage current signal. The first and second leakage current detection lines are electrically insulated from each other, and respectively cover one of the first and second current-carrying lines. The at least one resistive element and/or semiconductor element is coupled in series between the first and second leakage current detection lines to form a current path for detecting an open circuit fault in the leakage current detection module. By detecting the fault in the first and second leakage current detection lines, the reliability of the LCDI device is improved.
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公开(公告)号：US20240426940A1
公开(公告)日：2024-12-26
申请号：US18447206
申请日：2023-08-09
Applicant: Chengli LI
Inventor： Chengli LI , Long CHEN , Guolan YUE
IPC: G01R31/52 , G01R31/327 , H02H1/00
Abstract: An electrical fault detection and interruption device includes a switch module coupled between input and output ends of current carrying lines, for controlling an electrical connection between the two ends; a signal collection module, for detecting a fault signal on the current carrying lines and converting it to an electrical signal; a signal processing module, for determining whether a fault is present on the current carrying lines based on the electrical signal, and generating an electrical fault signal accordingly; a drive module, for driving the switch module to disconnect the electrical connection between the input and output ends in response to receiving the electrical fault signal; and an alarm module, for generating an alarm signal in response to receive the electrical fault signal. Thus, even when the device malfunctions and loses its protection function, it can still generate an alarm signal to alert the user.
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公开(公告)号：US20240421582A1
公开(公告)日：2024-12-19
申请号：US18818335
申请日：2024-08-28
Applicant: Chengli LI
Inventor： Chengli LI , Long CHEN
Abstract: A leakage current detection and interruption device includes a switch for controlling an electrical connection between input and output ends of power supply lines; a leakage current detection module for generating a leakage fault signal when detecting a leakage current on the power supply lines; a drive module coupled to the leakage current detection module and the switch, for controlling the switch to disconnect or connect the electrical connection; a wireless communication module including a signal processing chip, coupled to the drive module and/or the leakage current detection module and/or the output end, for wirelessly communicating with a remote control device to allow the remote control device to perform at least one of: controlling the switch to disconnect or connect the electrical connection, setting parameters of the device, and obtaining electrical connection information and/or fault information of the device. The device enables remote control and monitor, using a simple structure.
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公开(公告)号：US20240332845A1
公开(公告)日：2024-10-03
申请号：US18297488
申请日：2023-04-07
Applicant: Chengli LI
Inventor： Chengli LI , Xiaoming ZHANG , Zenghui LV
IPC: H01R13/453
CPC classification number: H01R13/4534
Abstract: A safety shield assembly for a power receptacle includes a slider frame and first and second slider blocks disposed therein. The slider frame has a bottom panel and a perpendicular sidewall along a periphery thereof. The bottom panel defines first and second openings having shapes corresponding to shapes of socket holes of the power receptacle. The first and second slider blocks respectively have first and second blocking portions respectively corresponding in position to the first and second opening. The bottom panel of the slider frame further includes guiding members, where the first and second slider blocks move within a space defined by the sidewall, as guided by the guiding members and under spring force of resilient members, between first positions where the first and second openings are covered, and second positions where the first and second openings are exposed. The safety shield assembly is reliable, safe, and convenient to use.
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公开(公告)号：US20240292586A1
公开(公告)日：2024-08-29
申请号：US18118305
申请日：2023-03-07
Applicant: Chengli LI
Inventor： Chengli LI , Long CHEN
CPC classification number: H05K9/0098 , H01B9/00 , H02H7/226
Abstract: A power cord includes at least two power supply lines, at least two insulation layers respectively covering the power supply lines, first and second shield layers respectively disposed around corresponding insulating layers to detect leakage currents on the corresponding power supply lines, at least one shield insulating layer disposed between the first and second shield layers to electrically insulate them from each other, a first and a second signal conductor disposed either between the first (or second) shield layer and the corresponding insulation layer or outside the first (or second) shield layer. Each signal conductors is formed of at least one conductor wire and at least one filament in a twisted or woven structure and configured to conduct the leakage current. The signal conductors have great tensile strength which solves the problem of breaking of the signal conductors.
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Patent Agency Ranking
公开(公告)号：US20240112872A1
公开(公告)日：2024-04-04
申请号：US18045552
申请日：2022-10-11
Applicant: Chengli LI
Inventor： Xiaoming ZHANG , Chengli LI
Abstract: A core unit for a leakage current detection and interruption device includes a control circuit board; a drive coil assembly coupled to the circuit board, including a coil holder frame and an input or output assembly connected thereto; and a magnetic movement assembly nested with the drive coil assembly, including a magnetic movement frame and the output or input assembly connected thereto. In response to relative movements between the drive coil assembly and the magnetic movement assembly away from or toward each other, the input and output assemblies are disconnected from or connected to each other, respectively. The core unit achieves reset function and trip function by the coordination of the drive coil assembly and magnetic movement assembly, effectively ensuring power connection and disconnection while reducing the number of components. This design reduces the size of the device and reduces assembly cost.
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37.发明公开公开(公告)号：US20240097426A1
公开(公告)日：2024-03-21
申请号：US17934552
申请日：2022-09-22
Applicant: Chengli Li
Inventor： Long CHEN , Chengli LI , Guolan YUE
CPC classification number: H02H3/05 , G01R31/52 , H01H47/002 , H01H47/32 , H01H71/24 , H02H3/08 , H01R13/713
Abstract: A leakage current detection and interruption device includes a switch module configured to control electrical connection between input and output ends of power supply lines; a leakage current detection module configured to generate a leakage fault signal in response to a leakage current in the power supply lines; a leakage-responsive drive module configured to drive the switch module to disconnect the electrical connection in response to the leakage fault signal; a fault-responsive drive module configured to drive the switch module to disconnect the electrical connection in response to a fault in the leakage-responsive drive module; and a self-test module configured to generate a self-test signal and to generate a self-test fault signal in response to a fault in the leakage current detection module and/or the leakage-responsive drive module. By providing the fault-responsive drive module, the device can automatically disconnect the electrical power when the leakage-responsive drive module has a fault.
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38.发明公开公开(公告)号：US20230307901A1
公开(公告)日：2023-09-28
申请号：US17706138
申请日：2022-03-28
Applicant: Chengli LI
Inventor： Chengli LI , Long CHEN , Guolan YUE
CPC classification number: H02H3/08 , G01R31/52 , H02H1/0007 , H02H7/008
Abstract: A leakage current detection and interruption device includes a switch module for controlling electrical connection of power supply lines between input and output ends; a leakage current detection module, including first and second leakage current detection lines respectively covering the first and second power supply lines, to detect leakage current thereon and to generate respective first and second leakage signals in response thereto; a signal processing module, coupled to the leakage current detection module to receive the first and/or second leakage signals and to generate a leakage fault signal in response thereto; and a trigger module, coupled to the switch module and the signal processing module, to receive the leakage fault signal and in response thereto, to drive the switch module to disconnect the electrical connection to the output end. The device can detect current leaks on the two power supply lines and is simple, low-cost and reliable.
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39.发明公开公开(公告)号：US20230268730A1
公开(公告)日：2023-08-24
申请号：US18173655
申请日：2023-02-23
Applicant: Chengli LI
Inventor： Chengli LI , Long CHEN
CPC classification number: H02H3/32 , G01R31/52 , H02H1/0007
Abstract: A leakage current detection and interruption device for a power cord includes a switch module that controls an electrical connection of first and second power supply lines because input and output ends; a leakage current detection module, including first and second leakage current detection lines, which respectively detect leakage current signals on the first and second power supply lines and generate self-test fault signals in response to the first and second leakage current detection lines having an open circuit; and a drive module including at least one solenoid, a first semiconductor device forming a first current path from the first to the second power supply line when conductive, and a second semiconductor device forming a second current path from the second to the first power supply line when conductive, to supply current to the solenoid which in turn drives the switch module to disconnect the electrical connection.
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公开(公告)号：US20210313796A1
公开(公告)日：2021-10-07
申请号：US17349133
申请日：2021-06-16
Applicant: Chengli LI
Inventor： Chengli LI , Long CHEN
Abstract: A leakage current detection and protection device includes a leakage current detection module for generating a detection feedback signal when detecting a leakage current on the power supply lines, wherein the power supply lines supply a working power to the leakage current detection module during half of the AC power cycles; a self-test module for testing whether the leakage current detection module is faulty based on the detection feedback signal, which includes: a simulated leakage current generating circuit for generating a simulated leakage current signal; a fault signal generating module for generating a self-test fault signal when the leakage current detection module has a fault; and a self-test compensation module for supplying an auxiliary working power to the leakage current detection module so the leakage current detection module is in a working state whenever the simulated leakage current is generated. This prevents misjudgment by the leakage current detection module.
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