| 摘要 |
PROBLEM TO BE SOLVED: To provide a bathtub bubble heating device having a function for keeping a temperature of air to be mixed in bathtub water at a temperature near the bathtub water, and capable of realizing the function at low costs.SOLUTION: A storage type water heater includes a reheating heat exchanger 16, a bathtub water circulation pipe 18, a bathtub adaptor 23, and a bathtub bubble heating device 30. In a reheating operation, bathtub water is circulated between the reheating heat exchanger 16 and a bathtub 22 through the bathtub water circulation pipe 18 to heat the bathtub water. Here, the bathtub adaptor 23 mixes the air sucked from an air pipe 24 to the heated bathtub water, and supplies the bathtub water including fine bubbles to the bathtub 22. The bathtub bubble heating device 30 heats the air sucked from the air pipe 24 to a temperature near the bathtub water by utilizing heat of the bathtub water flowing in the bathtub water circulation pipe 18. Thus lowering of the temperature of the bathtub water in mixing the bubbles can be prevented. |
