| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water supply system in which a pressure type water heater and a gas water heater cooperate to supply hot water and which prevents waste of hot water heated by the pressure type water heater and stored in a hot water storage tank as much as possible. <P>SOLUTION: The hot water supply system 1 includes the gas water heater 2 and the pressurized water heater 4 having a hot water storage tank unit 7, and switches a hot water supply source to a hot water supply port 5 either to the pressurized water heater 4 or to the gas water heater 2 by using a three-way valve 3. An ECU substrate 8 switches a hot water delivery route to the gas water heater 2 if a difference amount of hot water obtained by subtracting a heated hot water amount from a used hot water amount of the pressurized water heater 4 becomes a predetermined threshold value or larger. Thereafter, the hot water delivery route is switched to the pressurized water heater 4 if the difference amount of hot water becomes smaller than the predetermined threshold value. This configuration prevents the hot water already heated by the pressurized water heater 4 and stored in the hot water storage tank unit 7 from being wasted. <P>COPYRIGHT: (C)2012,JPO&INPIT |
