| 摘要 |
PURPOSE:To contrive to use parts for dual purpose and reduce parts assembly by employing an integrated structure of an air-blast chamber and a heat- exchanger being as one unit. CONSTITUTION:An air blast unit 1 and a heat-exchanger unit 3 are integrated as one unit, which forms a combustion chamber 4 and also a stage differential unit 5 is provided at the sectioned surface of the air blast unit 1 and the heat- exchanger unit 3. With this structure, it is possible to fixedly secure a flange 7 of a burner body 6 together with a fixed type guide blade using the pluralities of tap-screws 9 for the combustion chamber 4 without using packing and sealing materials. On the other hand, another single piece of 9 is being fabricated so as to have an inner through hole 10 for passing through a primary air, the position of which is face to face against a small hole 14 of an ignition tube 13 in order to decide a correct positioning. With this structure, it is possible to eliminate an air hole tube for primary air provided in the conventional type one, as well as to enlarge the air blower chamber 1' of the air blast unit 1 to reduce air resistance, thereby reduction of air-fan blade from 2-stage to 1-stage or the like, similarly reduction of parts assembly due to utilization of the parts for dual purpose, may be possible.
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