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    • 7. 发明专利
    • AIR QUANTITY CONTROL SYSTEM FOR VENTILATION FAN
    • JP2002206498A
    • 2002-07-26
    • JP2001002291
    • 2001-01-10
    • KAJIMA CORP
    • TOKUNAGA MASAHIKO
    • F04D27/00F04B49/06F04D29/44F24F7/007
    • PROBLEM TO BE SOLVED: To provide an air quantity control system for a ventilation fan capable of preventing clogging of a pilot duct due to oil and fat, capable of preventing lowering of energy-saving efficiency, and capable of stabilizing the capacity. SOLUTION: This air quantity control system for the ventilation fan is provided with a plurality of branch ventilation ducts 1a, 1b and 1c for carrying the polluted air including oil and fat, a main ventilation duct 3 connected to the downstream end of each branch ventilation ducts 1a, 1b and 1c, to unify the branch ventilation ducts 1a, 1b and 1c, a ventilation fan 5 provided in the downstream end of the main ventilation duct 3 to discharge the polluted air from the main ventilation duct 3, a pilot duct 7 connected to the upstream end 3a of the main ventilation duct 3 and having a terminal opened in the atmospheric space 8 which does not contain dirt such as oil and fat, a wind speed sensor provided inside of the pilot duct, and a control means 14 for controlling the air quantity of the ventilation fan 5, on the basis of the wind speed obtained by the wind speed sensor.
    • 10. 发明专利
    • AIR QUANTITY CONTROL SYSTEM OF EXHAUST FAN
    • JP2001050192A
    • 2001-02-23
    • JP22592999
    • 1999-08-10
    • KAJIMA CORP
    • TOKUNAGA MASAHIKO
    • F01N13/00F01N13/08F01N99/00F04D27/00F01N7/00F01N7/08
    • PROBLEM TO BE SOLVED: To carry out air flow control of an exhaust fan by using a static pressure sensor even in case of exhausting unclear air. SOLUTION: An exhaust fan air quantity control system 17 is provided with a plural number of branched exhaust air ducts 1a, 1b, 1c, 1d to carry contaminated air containing fat and oil, etc., a main exhaust air duct 3 connected to flow terminals of the branched exhaust air ducts 1a, 1b, 1c, 1d and to integrate a plural number of the branched exhaust air ducts 1a, 1b, 1c, 1d, an exhaust air fan 5 provided on a flow terminal of the main exhaust air duct 3 and to exhaust contaminated air from the main exhaust air duct 3, a pilot duct 7 a flow terminal of which opens to the main exhaust air duct 3 in the neighbourhood of the exhaust air fan and a suction port end of which opens to an atmospheric air space not containing contamination of oil and fat, etc., a static pressure sensor 9 provided in the pilot duct and a control means 13 to control air quantity of the exhaust air fan 5 in accordance with static pressure provided by the static pressure sensor 9.