Relay
By introducing the synergistic effect of the exciter and valve assembly into the relay, active pressure relief is achieved, solving the problem of explosion of high-voltage DC relays during short circuits and improving safety.
WO2026130533A1PCT designated stage Publication Date: 2026-06-25XIAMEN HONGFA ELECTRIC POWER CONTROLS CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- XIAMEN HONGFA ELECTRIC POWER CONTROLS CO LTD
- Filing Date
- 2025-12-19
- Publication Date
- 2026-06-25
AI Technical Summary
Technical Problem
High-voltage DC relays are prone to arcing between the moving and stationary contacts due to electrostatic repulsion when short-circuited under load, which can lead to an explosion and pose a safety hazard.
Method used
Design a relay comprising a housing, an exciter, and a valve assembly. The exciter activates and releases gas when a threshold current passes through it. When the pressure inside the housing reaches the threshold, the valve assembly opens a pressure relief port to release pressure and prevent explosion.
Benefits of technology
By actively releasing gas and promptly depressurizing, the casing is prevented from exploding, thus improving safety.
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Smart Images
Figure CN2025143964_25062026_PF_FP_ABST
Abstract
Provided in the present disclosure is a relay, comprising a casing, an exciter and a valve assembly, wherein the casing has a pressure relief hole that extends through an inner wall surface and an outer wall surface of the casing; the exciter is mounted inside or on the casing, and is configured to be activated to release gas into the casing when a threshold current passes through the relay; and the valve assembly is mounted on the casing and covers the pressure relief hole, and is configured such that when the exciter has been activated and the gas pressure in the casing is greater than or equal to a threshold value, the valve assembly is ruptured by gas in the casing and opens the pressure relief hole.
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