COLUMN VIBRATION RESTRICTING MECHANISM IN COMBUSTION DEVICE FOR HOT WATER

摘要

PURPOSE:To restrict an occurrence of vibration of column, make a small-sized combustion apparatus for hot water and a low noise of the apparatus by a method wherein a by-pass passage by-passing a heat exchanger is arranged outside the combustion chamber. CONSTITUTION:In a hot water combustion apparatus 4 provided with a hot water heat exchanger 3 at a downstream side of a burner 2 within a combustion chamber 1, a bypass passage 4 by-passing a heat exchanger 3 is arranged outside the combustion chamber 1. A part of the combustion gas is flowed in the by-passing passage 4 from an up-stream side of the heat exchanger 3 and flowed to a downstream side of the heat exchanger 3 and then it is discharged out of a discharging port 5 together with the combustion gas passed through the heat exchanger 3. Vibrations of column in each of the modes diminish with each other through an inlet 6 and an outlet 7 of the bypass passage 4 in the upstream and downstream sides of the heat exchanger 3 and, therefore, it is possible to make hard a spatial vibrating condition of a column vibration of the burner of a specified mode. As a burner 2, an original mixing burner is applied and in case that a high density short flame 8 of plane shape is formed at the end part of the combustion chamber 1, an occurrence of column vibration is restricted. Heat of the combustion gas passed through the bypass passage 4 can effectively utilized under an arrangement of a heat exchanger 3'.