| 摘要 |
<p>PURPOSE: A hot water storage type condensing boiler having a multistage structure is provided to supply a same combustion load and to improve productivity by making a length of each fire tube installed through penetrating an upper mirror plate and a lower mirror plate identical. CONSTITUTION: A hot water storage type condensing boiler having a multistage structure comprises a boiler casing (110), a burner (151), an upper mirror plate (121), a lower mirror plate (122), and multiple fire tubes (130). The upper mirror plate comprises multistage shapes (121a, 121b, 121c) in order to raise a height from a central part which is the nearest distance with a flame boiled out from a firebox (111) to an outer part which is the most far distance with the flame. The lower mirror plate includes a same pattern with the upper mirror plate. The lower mirror plate comprises the multistage shapes in order to raise a height from a central part to an outer part. The opened top end part of the multiple fire tubes connected to the firebox. The opened low end of the multiple fire tubes is connected to a combustion gas emission part (140).</p> |
