| 摘要 |
PURPOSE:To accurately control the temperature in effluent hot-water, by putting out an operation signal in order to ignite a burner, when the calorific value needed to heat the effluent water up to the intended set temperature exceeds the set calorific value. CONSTITUTION:A sensor 6 detects the flow rate and the temperature of influent water (c) which passes through a feed pipe 3 and is fed into a heat exchanger 2, and puts out a flow rate signal F and a temperature signal Qi. Based on the flow rate signal F and the temperature signal Qi, a processing circuit 7 determines the product of the difference between the influent water temperature and the set effluent hot-water temperature and the water flow rate, and puts out an operation signal (a) when the determined value is larger than the intended set value. Gas burners 1 are ignited in accordance with the predetermined order when the above-mentioned operation signal is put out. With such an arrangement, the temperature in effluent hot-water (b) can be accurately controlled, and it makes the titled water heater possible to connect to a solar heat source. |
