公开(公告)号：US20250141206A1

公开(公告)日：2025-05-01

申请号：US18505031

申请日：2023-11-08

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN ,  Guolan YUE

IPC: H02H3/16 ,  H02H3/02

Abstract: A ground fault circuit interrupter (GFCI) device includes a ground fault detection module for detecting a ground fault in a neutral line of a plurality of current carrying lines and generating a ground fault signal in response thereto, including a neutral line detection coil having a magnetic core made of a silicon steel and through which the current carrying lines pass; a leakage current detection module for detecting the ground fault signal and detecting a leakage current signal on the current carrying lines, and generating a zero sequence current fault signal in response to either signal; and a drive module for receiving the zero sequence current fault signal and driving a switch module to disconnect the electrical connection of the current carrying lines in response thereto. The GFCI device can avoid false tripping when high frequency currents flow through the current carrying lines, improving user experience and enhancing safety.

公开(公告)号：US20250007272A1

公开(公告)日：2025-01-02

申请号：US18218189

申请日：2023-07-05

Applicant: Chengli LI

Inventor： Chengli LI ,  Shengyun NIE

IPC: H02H3/16 ,  G01R31/52 ,  H01H83/04 ,  H02H1/00 ,  H02H7/22

Abstract: A leakage current detection and interruption (LCDI) device includes a leakage current detection module, including first and second leakage current detection lines, a signal 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 thereto. 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. A point at which the first and second leakage current detection lines are coupled to each other is coupled to the signal line, to form respective current paths with the signal line, for detecting an open circuit fault in the leakage current detection module. The at least one resistive element and/or the at least one semiconductor element is coupled in the current paths.

公开(公告)号：US20240272238A1

公开(公告)日：2024-08-15

申请号：US18349137

申请日：2023-07-08

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN

IPC: G01R31/52 ,  G01R31/58 ,  H02H3/16

CPC classification number: G01R31/52 ,  G01R31/58 ,  H02H3/16

Abstract: A leakage current detection and interruption (LCDI) device includes a switch module 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 module, for controlling the switch module to disconnect or connect the electrical connection; a wireless communication module, coupled to 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 module to disconnect or connect the electrical connection, setting parameters of the LCDI device, and obtaining electrical information and/or fault information of the LCDI device. The wireless communication module may be further coupled to the drive module and/or the leakage current detection module.

公开(公告)号：US20240258735A1

公开(公告)日：2024-08-01

申请号：US18170304

申请日：2023-02-16

Applicant: Chengli LI

Inventor： Chengli LI ,  Xiaoming ZHANG

IPC: H01R13/453

CPC classification number: H01R13/4534

Abstract: A safety shield assembly for a power receptacle, including: a slider frame having first and second openings with shapes corresponding to socket holes of the power receptacle; a first slider block disposed in the slider frame, having a first driving portion and a first blocking portion which corresponds in position to the second opening; a second slider block disposed in the slider frame, having a second driving portion and a second blocking portion which corresponds in position to the first opening; and a resilient member disposed between the first and second slider blocks and configured to urge the slider blocks to move relative to each other in the slider frame, to switch between a first state of the safety shield assembly where the first and second openings are respectively covered by the second and first blocking portions and a second state where the first and second openings are exposed.

公开(公告)号：US20230361514A1

公开(公告)日：2023-11-09

申请号：US17740098

申请日：2022-05-09

Applicant: Chengli LI

Inventor： Chengli LI ,  Xiaoming ZHANG ,  Fei LIN

IPC: H01R13/713 ,  H01R13/717

CPC classification number: H01R13/713 ,  H01R13/7175

Abstract: A power plug includes a shell, input insertion plates, output power lines, a push button on the shell, and a trip assembly inside the shell for controlling electrical coupling between the input insertion plates and output power lines. The trip assembly includes a light emitting element, electrical coupling terminals, and a drive member mechanically coupled to the push button and configured to, in response to a pressing of the push button, control electrical coupling of the electrical coupling terminals, which in turn controls the electrical coupling between the input insertion plates and output power lines. The drive member includes a reflective portion that reflects a part of the light from the light emitting element to the push button as an indicator light. The dual function drive member that accomplishes both mechanical coupling and light transmission reduces the number of components. A device with an electrical control circuit is also disclosed.

公开(公告)号：US20230352885A1

公开(公告)日：2023-11-02

申请号：US17740092

申请日：2022-05-09

Applicant: Chengli LI

Inventor： Chengli LI ,  Xiaoming ZHANG ,  Fei LIN

IPC: H01R13/66 ,  H01R24/28 ,  H02H3/16

CPC classification number: H01R13/665 ,  H01R24/28 ,  H02H3/162

Abstract: A leakage current detection interrupter (LCDI) device for an electrical appliance includes a shell and a trip assembly inside the shell. The shell includes an upper cover and a base cover joined together, and either the upper cover or the base cover includes a first cover and a removable second cover. The second cover spatially corresponds to a tail portion of the trip assembly; when it is removed, the tail portion is expose to allow a power cord to be connected to the LCDI device. By using a removable second cover, the cord can be conveniently assembled with the LCDI device when the LCDI device is installed on the electrical appliance, allowing the LCDI to be shipped without the cord. This can reduce the packed size of the LCDI device for easier shipping and storage, as well as lowering cost. It also makes the LCDI device more versatile.

公开(公告)号：US20230268729A1

公开(公告)日：2023-08-24

申请号：US18178409

申请日：2023-03-03

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN

IPC: H02H1/00 ,  H02H3/16 ,  H02H7/22 ,  H01H83/02

CPC classification number: H02H1/0038 ,  H02H3/16 ,  H02H7/228 ,  H01H83/02

Abstract: A power cord with leakage current detection and interruption (LCDI) function includes at least two power supply lines, at least two insulating layers respectively covering the at lease two power supply lines, at least two leakage current detection lines respectively disposed around the at least two insulating layers, including a first leakage current detection line and a second leakage current detection line, at least one connector line, electrically coupled to the first leakage current detection line and/or the second leakage current detection line, and at least one insulating structure, covering at least one of the at least two leakage current detection lines, to electrically insulate the first and second leakage current detection lines from each other.

公开(公告)号：US20230082601A1

公开(公告)日：2023-03-16

申请号：US17476236

申请日：2021-09-15

Applicant: Chengli LI

Inventor： Chengli LI ,  Xiaoming ZHANG

IPC: H01R13/713 ,  H01R24/30

Abstract: A power plug with LCDI includes a shell, multiple input insertion prongs partially exposed to an exterior of the shell, a movement assembly disposed in the shell and coupled to the multiple input insertion prongs, a male end assembly and a female end assembly both disposed in the shell, and multiple output conductors. A first end of the male end assembly is connected to the movement assembly and electrically coupled to the multiple input insertion prongs via the movement assembly; a second end of the male end assembly is inserted into a first end of the female end assembly; a second end of the female end assembly is electrically coupled to the multiple output conductors; and the movement assembly is configured to establish or cut off an electrical connection between the multiple input insertion prongs and the multiple output conductors. This power plug improves efficiency of assembly.

公开(公告)号：US20230073077A1

公开(公告)日：2023-03-09

申请号：US17472404

申请日：2021-09-10

Applicant: Chengli LI

Inventor： Chengli LI ,  Xiaoming ZHANG ,  Zenghui LV

IPC: G01R31/52 ,  H02H3/16 ,  H02H3/08 ,  H02H3/33

Abstract: An LCDI device includes a shell, a movement unit, and a wire bundle assembly. The shell includes a base and an upper cover connected to each other. The movement unit is disposed in the base, and includes at least one connecting conductor. A first end of the wire bundle assembly is disposed in the upper cover and includes at least one shield detection line, where the shield detection line is electrically coupled to the connecting conductor. The shield detection line includes a connecting terminal at the first end of the wire bundle assembly which is configured to received and retain the connecting conductor inserted therein. The structure of the LCDI enables fast and secure assembling of the wire bundle assembly and movement unit, and eliminates the need for internal re-adjustment of the shield detection lines after assembling, which promotes automation of large scale production.

公开(公告)号：US20210210946A1

公开(公告)日：2021-07-08

申请号：US16746510

申请日：2020-01-17

Applicant: Chengli LI

Inventor： Chengli LI ,  Guolan YUE ,  Long CHEN

IPC: H02H3/06

Abstract: A leakage current protection device with automatic reset after power outage includes a switch, a power supply module, a leakage current detection module, a self-testing module, a drive control module, and a first reset module. The drive control module drives the switch based on a leakage current signal from the leakage current detection module and/or a self-test fault signal from the self-testing module. The first reset module functions to automatically set the leakage current protection device in a connected state when power resumes after an outage. Another leakage current protection device with manual reset after power outage includes similar components above and also a second reset module, which functions to automatically set the leakage current protection device in a disconnected state when power resumes after an outage; the device can then be manually reset using a reset switch. These two devices can suit different needs of different electrical appliances.