Pumps – Condition responsive control of pump drive motor – Responsive to pump or pump fluid temperature
Patent
1995-05-11
1997-07-15
Koczo, Michael
Pumps
Condition responsive control of pump drive motor
Responsive to pump or pump fluid temperature
417 1, 355 30, 399 92, F04B 4910
Patent
active
056477279
ABSTRACT:
In an image forming apparatus provided with a cooling fan for cooling an original table glass, a controller measures a cooling time from the end of a previous copying operation to the start of a current copying operation. An operating condition determining section estimates a residual amount of heat energy based on the measured time and the generated amount of heat energy at the pervious copying operation. An amount of heat energy to be generated at the current image forming is added to the thus estimated residual amount of heat energy. Based on the sum of the heat energy, actual temperature-rise characteristics are calculated. The fan is driven at a rotating rate for an operating time in accordance with the thus calculated temperature-rise characteristics.
REFERENCES:
patent: 4903072 (1990-02-01), Iwata
patent: 5095333 (1992-03-01), Shimada
patent: 5144366 (1992-09-01), Sakamoto et al.
patent: 5150154 (1992-09-01), Kuwabara
patent: 5151573 (1992-09-01), Masuda
patent: 5172159 (1992-12-01), Nakagama et al.
patent: 5508782 (1996-04-01), Koh et al.
Patent Abstracts of Japan, vol. 14, No. 317 (P1073) Jul. 9, 1990 & JP-A-02 103 060 (Konica) *abstract*.
Taniguchi Akihiko
Toyoda Masashi
Koczo Michael
Sharp Kabushiki Kaisha
Thai Xuan M.
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