Miniature electromagnetic valve

CN121761171BActive Publication Date: 2026-06-09NINGBO RIAN ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO RIAN ELECTRIC CO LTD
Filing Date
2026-03-03
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing miniature solenoid valves are difficult to miniaturize under high-pressure fluid control, and suffer from problems such as insufficient driving force, severe heat generation, unstable valve core movement, and short lifespan.

Method used

The valve core structure is symmetrically distributed or circumferentially distributed. The valve core is rotated by an electromagnetic drive structure. The symmetrical design counteracts the fluid pressure. Combined with elastic elements and cam grooves, it achieves a self-holding function, reducing the driving force requirement and improving stability.

Benefits of technology

This technology enables the miniaturization of micro solenoid valves under high-pressure fluid control, improves driving efficiency, reduces heat generation, enhances valve core stability and lifespan, and ensures precise and timely fluid control.

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Abstract

This application provides a miniature solenoid valve, including a valve body, a valve core, and an electromagnetic drive structure. The valve core employs symmetrically distributed or circumferentially distributed openings, allowing the fluid pressures from different directions to cancel each other out. The valve body has an inlet chamber, an outlet chamber, and a valve core cavity. The valve core cavity rotatably mounts the valve core, which is driven to rotate back and forth by the electromagnetic drive structure. The valve core has a central channel and multiple side holes, with the central channel communicating with the side holes. When the valve core rotates to the first position, the miniature solenoid valve is in the open state, allowing fluid to enter the inlet chamber, pass through the central channel, and reach the outlet chamber through the side holes. When the valve core rotates to the second position, the miniature solenoid valve is in the closed state, preventing fluid from reaching the outlet chamber from the inlet chamber due to the valve core's symmetrical structure and the mutual cancellation of liquid pressures from different directions. This results in less resistance during valve core rotation, leading to more precise and timely fluid control.
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Citation Information

Patent Citations

  • self-holding solenoid valve

    CN104676078B

  • Self-holding solenoid valve

    CN107246497B

  • Self-hold through type electromagnetic valve

    CN204358214U

  • Gas alternating generator

    CN114151567A

  • Solenoid gas valve

    CN2872001Y