OPERATION CONTROLLING METHOD IN INSTANTANEOUS HOT WATER FEEDER

PURPOSE:To improve a rising characteristic at the time of cold starting in operation of a hot water feeder. CONSTITUTION:A pressure control under a high gain is carried out in concurrent with a starting in operation, a Feed-Forward(FF) control is performed when the FF value is attained and further F...

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Bibliographic Details
Main Author FUJISAWA KAZUYA
Format Patent
LanguageEnglish
Published 23.07.1993
Subjects
BLASTING
CONTROL OR REGULATING SYSTEMS IN GENERAL
CONTROLLING
FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL
FUNCTIONAL ELEMENTS OF SUCH SYSTEMS
HEATING
LIGHTING
MECHANICAL ENGINEERING
MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS
PHYSICS
RANGES
REGULATING
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
VENTILATING
WEAPONS
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Summary:PURPOSE:To improve a rising characteristic at the time of cold starting in operation of a hot water feeder. CONSTITUTION:A pressure control under a high gain is carried out in concurrent with a starting in operation, a Feed-Forward(FF) control is performed when the FF value is attained and further FF+PI control is carried out at the time when the temperature approaches the set temperature. With such an arrangement, at the time of rising in operation, performance similar to that of the FF+PI control can be assured and at the same time an amount of overshooting is also reduced and the operation can accommodate for fine variation in environment or aging of the hot water feeder and the like.
Bibliography:Application Number: JP19910344684