| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent discharging of strong-acid drain water without neutralized in a water heater recovering latent heat. <P>SOLUTION: This water heater is provided with a rain intrusion preventing flow channel 30 positioned at a downstream of an exhaust flow channel 29 for preventing intrusion of rain into the exhaust flow channel 29, thus the intrusion of rain which may have strong acid, from an exhaust opening 31 can be prevented, consumption of a neutralizing agent of a neutralizing means can be reduced, shortening of service life of the neutralizing means 38 can be prevented, and draining of strong-acid drain water without neutralized can be prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT |
