| CPC F24D 19/1051 (2013.01) [F24D 17/0057 (2013.01); F24D 17/0078 (2013.01); F24D 2220/0207 (2013.01); F24D 2220/042 (2013.01); F24D 2220/044 (2013.01)] | 11 Claims |
|
1. A hot water returning system comprising:
a hot water generator configured to generate hot water;
a hot water line configured to supply the hot water generated by the hot water generator to a source of demand;
a water returning line configured to return water to the hot water generator for preheating the water in the hot water line;
a pump disposed in any one of an inner line in the hot water generator, the hot water line, and the water returning line and configured to pump the water for returning of the water; and
a processor electrically connected to the pump,
wherein the processor is configured to:
(i) determine a need for preheating and a status for use of hot water, wherein the status for use of hot water corresponds to whether hot water is being supplied to a source of demand; and
(ii) control the pump based on the determination of the need for preheating and the status for use of hot water, and
when the need for preheating is changed, control the pump to maintain an existing operational state when the status for use of hot water is determined to be that hot water is being supplied to the source of demand, and
when the need for preheating is changed, control the pump to change the operational state when the status for use of hot water is determined to be that hot water is not being supplied to the source of demand.
|