Device and method for controlling valve

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8271142
APP PUB NO 20090228153A1
SERIAL NO

12403087

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is an easy to use valve controller designed to obtain optimum operation performance. The valve controller is designed to control the valve opening of an expansion valve by calculating the valve opening such that a detected temperature coincides with a target temperature. The valve controller includes an automatic for calculating a deviation between the detected temperature and the target temperature and for calculating a changing amount of the valve opening by substituting at least the deviation and a set control parameter into an arithmetic expression to automatically set the control parameter. The valve controller further includes and control level adjuster for adjusting a magnitude of the valve opening calculated with the control parameter set by the automatic tuning means in stages in accordance with a set control level.

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Patent Owner(s)

  • FUJIKOKI CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ogawa, Yoshio Setagaya-ku, JP 30 324

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