BATH WATER HEATER WITH SINGLE TANK AND DOUBLE WATER PIPES

• Main Authors: UCHIYAMA TSUBASA, SATO YOSHIYUKI
• Format: Patent
• Language: English
• Published: 16.08.2012
• Subjects: BLASTING; FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

PROBLEM TO BE SOLVED: To provide a bath water heater with a single tank and double water pipes which is capable of more accurately calculating a circulating flow rate in a reheating operation in a period of stopping hot water feeding without providing a dedicated flow rate sensor.SOLUTION: When the reheating operation is carried out in the period of stopping hot water feeding, a controller 45 makes all or parts of a burning face of a burner portion 18 burn intermittently so that water in a feeding water pipe 14a does not boil. When the circulating flow rate per unit time during the reheating operation is calculated, the circulating flow rate is calculated by correcting an operation based on a difference of a detected temperature of a bath supply temperature sensor 42 and a detected temperature of a bath return temperature sensor 43 and the quantity of heat given to a reheating water pipe 14b in consideration of a heat dissipation amount by a heat exchanger 14 during a burning off period.