| 摘要 |
PURPOSE: A pipe connection structure of a boiler is provided to sufficiently pre-heat air by using a waste heat of exhaust gas which is discharged to an exterior through an exhaust pipe. CONSTITUTION: A pipe connection member(90) includes an inner pipe(91). One end of the inner pipe(91) is communicated with an exhaust gas discharging hole and the other end of the inner pipe(91) is communicated with an exhaust pipe. The inner pipe(91) is surrounded by an outer pipe(92). An upper partition(93) and a lower partition(94) are formed between the inner pipe(91) and the outer pipe(92). The pipe connection member(90) also has a connection pipe(95) which is communicated with a peripheral portion of the outer pipe(92) and is communicated with an air inlet. A plurality of air suction holes(92a) are formed at the peripheral portion of the outer pipe(92).
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