Title:
【発明の名称】換気フードを制御するための方法および装置
Document Type and Number:
Japanese Patent JP2701981
Kind Code:
B2
Abstract:
This invention relates to a fume hood controlling method and apparatus which reduces the amount of replacement air required to operate a fume hood by permitting the fume hood to operate at a relatively low face velocity in the absence of a containment affecting condition, but which is capable of detecting the occurrence of a containment affecting condition, such as the presence or movement of a user within a selected area of the face of the fume hood, and of increasing face velocity to a selected level in response to such detection. When the detected condition no longer exists, the control automatically returns the fume hood to the lower face velocity, preferably with a time delay. Maximum replacement air volume and minimum replacement air volume may also be controlled in response to such detection.
Inventors:
Sharp, gordon pee
Application Number:
JP50460393A
Publication Date:
January 21, 1998
Filing Date:
August 17, 1992
Export Citation:
Assignee:
Phoenix Controls Corporation
International Classes:
B08B15/02; F24F7/007; B01L1/00; (IPC1-7): F24F7/007; B01L1/00
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)
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