| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique capable of performing drainage by a simple method for a water heat exchanger.SOLUTION: A water heat exchanger disclosed in the present specification comprises: a first water channel constituted by a spirally wound tubular body, and including an upper opening and a lower opening; a second water channel constituted by a spirally wound tubular body, and including an upper opening and a lower opening; a water connection channel connecting the upper opening of the first water channel to that of the second water channel; a water inlet channel introducing water to the lower opening of the first water channel; a water outlet channel discharging the water from the lower opening of the second water channel; and an air release channel connected to the water connection channel, and including an air release valve. |
