| 摘要 |
PROBLEM TO BE SOLVED: To provide a water heater capable of efficiently dispersing fine bubbles to the entire bathtub.SOLUTION: A water heater includes: an air pump 68 for pumping air to a bath adaptor 61 having a porous body 67a for discharging the air into hot water inside a bathtub 31 as fine bubbles; an air pipe 69 in which the air flows to the bath adapter 61; a bath outgoing pipe 29 and a bath returning pipe 30 for forming a bath circulation circuit 60; a bath circulation pump 23 for circulating the hot water; a bath heat exchanger 24 for heating the hot water flowing in the bath circulation circuit 60; and control means 51 for operating the bath circulation pump 23 and the air pump 68, and for executing a supply operation for discharging the fine bubbles into the hot water inside the bathtub 31. As a pressure of the hot water pumped to the bath circulation circuit 60 by the bath circulation pump 23 in the supply operation is variable, in accordance with a condition of the water heater 100 being installed, the fine bubbles can be generated from an outer surface of the porous body 67a without excess or deficiency, and they can be dispersed inside the bathtub 31 efficiently. |
