Valve system

The valve system uses a pressure sensor and control device to adjust valve opening based on internal pressure changes, addressing responsiveness and step loss issues, achieving precise fluid flow control and cost-effective operation.

JP7864612B2Active Publication Date: 2026-05-25AISAN IND CO LTD
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Patent Information

Authority / Receiving Office
JP Β· JP
Patent Type
Patents
Current Assignee / Owner
AISAN IND CO LTD
Filing Date
2022-10-07
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Existing valve systems face challenges in accurately controlling the flow rate of fluid due to insufficient responsiveness of the drive device and the need for waiting times to prevent step loss, especially when using stepping motors, limiting fine adjustments of the valve opening amount.

Method used

A valve system with a pressure sensor and control device that adjusts the opening and closing of a valve based on internal pressure changes, using a stepping motor to control the valve body movement, and calculates waiting times to match the target pressure change rate, thereby improving accuracy and responsiveness.

Benefits of technology

The system achieves precise control of fluid flow rates by adjusting waiting times and pressure change rates, enhancing accuracy and reducing manufacturing costs and power consumption compared to traditional methods.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a valve system that allows a valve opening position of a blocking valve to be estimated sooner.SOLUTION: A valve system 1 includes a tank 2 capable of storing fluid, a pressure sensor 6 for detecting inner pressure of the tank 2, a valve 4 having a valve body 11 and opening / closing the tank 2, a stepping motor 12 for stroking the valve body 11 of the valve 4, and a control device 5. The control device 5 moves the valve 4 in a valve opening direction after the start of a cycle, reverses the moving direction of the valve body 11 of the valve 4, moves the valve to a stand-by position for a valve closing state, calculates a first pressure change ratio, which is a change ratio of the inner pressure from the start of the cycle, determines a stand-by time so that a second pressure change ratio of the inner pressure, which is a change ratio of the inner pressure from the start to the end of the cycle, is equal to a target change ratio if the first pressure change ratio is greater than the target change ratio, and stops the stepping motor 12 at the stand-by position until the determined stand-by time elapses.SELECTED DRAWING: Figure 1
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