Door lock loop short circuit detection device

By designing a door lock loop short-circuit detection device, and using the short-circuit detection loop and control device to identify the short-circuit status of the door lock lock, the complexity and risk problems of the door lock loop short-circuit detection in the prior art are solved, and simple, safe and efficient short-circuit detection is achieved.

CN119758171APending Publication Date: 2025-04-04SHANGHAI MITSUBISHI ELEVATOR CO LTD
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Patent Information

Application Number
CN202411921924.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

In the existing elevator system, the door lock circuit short-circuit detection technology has strict door lock group sequence regulations, many wiring harnesses, high risk of short-circuit during the inspection process, and the need for additional diagnostic circuits for contact diagnosis.

Method used

A door lock circuit short-circuit detection device is designed, including a short-circuit detection loop and a short-circuit detection control device. The short-circuit detection loop is connected in parallel with the door lock through the first detection contact, the first detection terminal and the second detection terminal. The short-circuit detection control device controls the closing and disconnection of the detection contact, and identifies the short-circuit state of the door lock based on the state of the terminal.

Benefits of technology

The flexibility of the connection order of each door lock in the door lock circuit is realized, the number of wire harnesses and detection contacts in the detection circuit is reduced, the risk of short-circuiting of the entire door lock circuit is avoided, and additional diagnostic circuits are required for contact diagnosis.

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Abstract

The invention discloses a door lock loop short circuit detection device which comprises a first door lock and a second door lock which are sequentially connected in series, the door lock loop is connected with a safety loop of an elevator in series, and the door lock loop short circuit detection device comprises a short circuit detection loop and a short circuit detection control device. The short circuit detection loop comprises a first detection contact, a first detection terminal and a second detection terminal; the first detection contact is connected with the first door lock in parallel, the tail end of the first door lock is connected with the first detection terminal, and the tail end of the second door lock is connected with the second detection terminal; the short circuit detection control device is connected with the first detection terminal and the second detection terminal; and the short-circuit detection control device controls the first detection contact to be closed and opened, and identifies the short-circuit state of the first door lock or the second door lock according to the state of the first detection terminal or the second detection terminal. The short circuit detection of the door lock loop can be realized through a simple short circuit detection loop structure.
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