Title:
【発明の名称】過熱点検出装置
Document Type and Number:
Japanese Patent JPH0743332
Kind Code:
B2
Abstract:
A detector (32) monitors infrared ray emissions from an air preheater (10) rotor (14) to detect a temperature rise that precedes a fire within air preheater (10) with each sensor output being processed independently by signal processing electronics. The instantaneous minus the average temperature of rotor (14) is calculated and compared to a variable trip level signal to determine whether a hot spot has been detected. The detector (32) scans across the face of rotor (14) until an initial hot spot is detected, whereupon the scanner motor (58) ceases operation thereby locating the scanner over the rotor (14) radial position of the detected hot spot. If the same hot spot is detected on the next subsequent rotor (14) pass, a hot spot alarm (60) is energized. If the hot spot is not detected on the next subsequent rotor (14) pass, detector scanning is resumed by energizing scan motor (58).
Inventors:
William Sea Cox
Gary Sea Getzchuth
Mark Tea Casagrand
Gary Sea Getzchuth
Mark Tea Casagrand
Application Number:
JP15458787A
Publication Date:
May 15, 1995
Filing Date:
June 23, 1987
Export Citation:
Assignee:
The Air Preheater Company Incorporated
International Classes:
F28D17/00; F28D19/04; F28F27/00; G01J5/00; G01J5/10; G01N25/50; G01N25/72; (IPC1-7): G01N25/72; F28D19/04; G01J5/10; G01N25/50
Domestic Patent References:
| JPS58147635A | ||||
| JPS49102397A |
Attorney, Agent or Firm:
Kimura Masami