| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve closure detection precision of a combustion device. <P>SOLUTION: The combustion device includes a combustion time integrating memory 421 which stores an integrated combustion time B obtained by integrating a combustion time Cb of a burner each time the burner is put in a combustion state; a closure determination part 423 which determines degrees of closure of an air supply passage and an exhaust passage based upon a current value of a fan motor when the fan is placed in operation at a predetermined closure detection rotational speed; control means of allowing determinations on the degrees of closure to be made when the integrated combustion time B stored in the combustion time integrating memory 421 reaches a predetermined reference combustion time S2; and control means of subtracting combustion stop times Db1, Db2 of the burner from the integrated combustion time B. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
