| 摘要 |
<p>PURPOSE: To supply hot water at stable temperature without causing uneven temperature by estimating one-shot time from the flow rate of water and temper ature rise and flicker controlling an electric heater based upon the one shot time. CONSTITUTION: A controller 10 comprises a flow rate measuring unit 52 composed of a proper flow sensor for measuring the flow rate of water flowing in from a water inlet 14, a water temperature measuring unit 54 composed of a thermistor for measuring the temperature of water flowing in from the water inlet 14, and a hot water temperature measuring unit 56 composed of a thermistor for electrically measuring the temperature of hot water supplied from a hot water outlet 16. Temperature rise is estimated from a difference between the set temperature of hot water set in a hot water temperature setting unit 44 and water temperature measured by the water temperature measuring unit 54. One-shot time that has been previously obtained by an experiment is estimated from the flow rate of water measured by the flow rate measuring unit 52 and the temperature rise, based on which one-shot time an electric heater 22 is flicker controlled.</p> |
