| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent an outbreak of harmful bacteria such as legionella bacteria and to prevent deterioration of boiling efficiency in a hot water storage type hot water supply system. <P>SOLUTION: The hot water storage type hot water supply system 1 is equipped with: a hot water storage tank 2 storing supply water; a heating source 3 heating the water of the hot water storage tank 2; a high-temperature hot water supply piping 54 supplying high temperature hot water heated by the heating source 3 to a high temperature layer 22a of the hot water storage tank 2; a high temperature tapping piping 56 tapping high temperature hot water; a middle temperature hot water supply piping 55 supplying heated middle temperature hot water to a middle temperature layer 22b; a middle temperature hot water tapping piping 57 tapping middle temperature hot water; and a control part 4 controlling operation of the heating source 3. In the control part 4, if an amount used of the middle temperature hot water in the hot water storage tank 2 does not exceed a certain amount during a certain period, all hot water in the hot water storage tank is reboiled to a temperature capable of carrying out sterilization. By this, an outbreak of bacteria such as the legionella bacteria can be prevented, and since boiling from the middle temperature hot water at unnecessary timing is suppressed, the boiling efficiency is not deteriorated. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
