BURNER IGNITION JUDGEMENT DEVICE IN GRAIN DRYER

PURPOSE:To eliminate ignition failure by a method wherein when it is judged based on a signal of a flame sensor that a burner is not ignited, changes in the rising temperature detected by a hot-air temperature sensor are compared and when the change in the rising temperature exceeds the specified va...

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Bibliographic Details
Main Author UEJI HITOSHI
Format Patent
LanguageEnglish
Published 17.09.1991
Subjects
BLASTING
COMBUSTION APPARATUS
COMBUSTION PROCESSES
DRYING
DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
HEATING
LIGHTING
MECHANICAL ENGINEERING
REGULATING OR CONTROLLING COMBUSTION
WEAPONS
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Summary:PURPOSE:To eliminate ignition failure by a method wherein when it is judged based on a signal of a flame sensor that a burner is not ignited, changes in the rising temperature detected by a hot-air temperature sensor are compared and when the change in the rising temperature exceeds the specified value, the presence or absence of flame of the burner is judged again based on the signal of the flame sensor. CONSTITUTION:When a first time period has elapsed after a burner 10 is ignited, an ignition judgment device judges based on the signal of a flame sensor whether or not the burner is ignited. When it is judged that the burner is not ignited, a re-judgment instruction device compares the rising change in detected temperature of a hot-air temperature sensor 22 with the specified value, and outputs a re-judgment signal when the rising change exceeds the specified value. When the re-judgment signal is outputs and a second time period has elapsed, the ignition re-judgment device judges again based on the detected signal of the flame sensor 42 whether or not the burner is ignited. Thereby, miss ignition can be diminished.
Bibliography:Application Number: JP19900006832