METHOD OF DRIVING FUEL FLOW RATE REGULATING VALVE OF HOT WATER MAKER

• Main Authors: YASUNAGA SHIGEFUMI, HAMADA YASUO, BANDO SEIJI
• Format: Patent
• Language: English
• Published: 04.02.1992
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; HEATING; LIGHTING; MECHANICAL ENGINEERING; REGULATING OR CONTROLLING COMBUSTION; WEAPONS

PURPOSE:To make the valve body develop vibration which is enough to prevent faulty operations and hysteresis and at the minimum limit and regulate fuel flow rate exactly and prevent the generation of vibration noises and pulsating combustion sounds by superposing an alternating current on the direct current which drives a solenoid flow rate regulating valve. CONSTITUTION:A drive circuit D is constituted of a rectification circuit (r) which rectifies the alternating current form a commercial power source into a direct current, smoothing circuit F which removes ripples in the rectified direct current, D/A converter DA which converts the drive signal from the control section C into voltage and outputs it, power transis tor Tp, voltage reducing device At which reduces the voltage of the commercial power, and a comparator CO, and it generates a direct current 11 which drives the solenoid flow rate regulating valve FC by the frive signal from the control section C and at the same time superpose a pulse wave 12 with the same frequency as that of the commercial power line on the direct current 11 to output electric current. Namely, it can give vibration to the advancing and retreating rod 47 of the valve body and a spherical valve body 45 and prevent faulty operations and hysteresis between the applies electric current and the operation of the spherical valve body 45 that is caused by the wear resistance, etc. between the advanc ing and retreating rod 47 of the valve body which develops when the solenoid flow rate regulating valve FC is driven by direct current.