| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hot water supply device capable of accurately discharging hot water of target temperature even if hot water of high temperature shows a rapid variation in temperature.SOLUTION: This invention relates a hot water supply device in which cold water of low temperature got from a feeding pipe 12 and hot water of high temperature got from a primary heat exchanger 8 for supplying hot water are mixed to each other to generate mixed hot water to be supplied as hot water. There are provided temperature sensors 17 to 19 for detecting each of temperatures of low temperature water, high temperature water and these mixed hot water. A control part 6 controls a mixing ratio of high temperature water and low temperature water on the basis of temperature data of the temperature sensors so as to control temperature specifying a temperature of the mixed hot water to a target temperature, the control part 6 detects the temperature data of high temperature water under a specified period and monitors it and when its variation wave-form is kept at its normal state, the detected temperature data is applied as a temperature of high temperature hot water and in turn when its variation wave-form is in a low frequency range, increasing or decreasing of the temperature data is amplified and when it is in a high frequency range, increasing or decreasing of the temperature data is reduced to perform a correcting processing and executes the prescribed temperature control.</p> |
