IMMEDIATE HOT-WATER SUPPLYING SYSTEM

摘要

An immediate hot-water supplying system 1 includes a P hot water supply device 10 configured to heat water flowing through a first supply pipe 2, an N hot water supply device 30 configured to heat water flowing through a second supply pipe 3, a check valve 6, and a coupled controller 60 configured to, when the flow amount detected by a second flow amount sensor 34 is equal to or more than a hot-water-supply detection flow amount, perform a hot-water supply operation in which a first burner 12 or a second burner 32 is burned with a circulation pump 16 stopped, and when the flow amount detected by the second flow amount sensor 34 is less than the hot-water-supply detection flow amount, perform a circulation heat keeping operation in which the first burner 12 is burned with the circulation pump 16 activated.

主权项

1. An immediate hot-water supplying system, comprising:
a first supply pipe having one end connected to a waterworks and other end connected to a hot-water tap; a return pipe configured to communicate between the one end and the other end of the first supply pipe; a first hot water supply device including a first heating unit which is connected on a way of the first supply pipe and configured to heat water flowing through the first supply pipe, and a circulation pump configured to circulate water in a circulation circuit including the first supply pipe and the return pipe; a second supply pipe configured to connect an upstream side and a downstream side of the first hot water supply device of the first supply pipe; a second hot water supply device including a second heating unit which is connected on a way of the second supply pipe and configured to heat water flowing through the second supply pipe, and a second flow amount sensor configured to detect a flow amount of water flowing from the second supply pipe; a check valve configured to enable water to flow from the second supply pipe to the second hot water supply device, and disable water to flow from the second hot water supply device to the second supply pipe; and a controlling unit configured to, when the flow amount detected by the second flow amount sensor is less than a predetermined hot-water-supply detection flow amount, perform a circulation heat keeping operation in which the first heating unit is activated in a state the circulation pump is activated, and when the flow amount detected by the second flow amount sensor is equal to or more than the hot-water-supply detection flow amount, perform a hot-water supply operation in which at least one of the first heating unit and the second heating unit is activated in a state the circulation pump is stopped.