| 摘要 |
PURPOSE:To achieve automation of control of hot-water supply to a bathtub by remotely controlling amount of hot water in the bathtub based on the temperature rise of hot water in the bathtub caused by a heating means. CONSTITUTION:There are provided a bathtub 20, circulation line (supplementary burning circulation pipline 60), city water line 11, separation means (hopper 48) for separating city water and hot water, first heating means (heat exchanger 28) for heating city water, second heating means (supplementary burning heat exchanger 22) for heating hot water, water injection valve (supplementary burning.hot water injection switch valve 50) for feeding or cutting off city water, pump 56 which circulates hot water through a circulation line to agitate hot water in a bathtub, temperature sensing means (temperature sensor 70) for sensing temperature of hot water, and control means (main device) to perform hot-water supply control. In the hot-water supply control, amount of hot water in the bathtub is calculated from the temperature rise of hot water caused by heating the hot water and the water injection valve is opened or closed based on the result of the calculation, and also the first heating means is actuated to feed hot water corresponding to hot water amount short of a desired amount of hot water to the bathtub via city water line. |
