Heating apparatus for space heating has heat exchanger with connectors running axially at both ends, to which at least two hydraulic turning regions are connected
作者： Wolfgang Schleiter
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摘要: The heating apparatus has a heat exchanger (1) with connectors (11, 12) axially orientated at both ends (9, 10), to which least two hydraulic regions (27, 28) are connected, in addition being connected each other. There shaped apertures one of the cover element (3) fit connectors.
lens.org 参考文章(2)
Juergen Dr-Ing Holtorf, Johann Eberling, Roger Dipl-Ing Doenges, Boiler with coiled heat exchanger, has coil which is compressible relative to counter bearing in burner casing ,(2000)
Juergen Holtorf, Johann Eberling, Roger Doenges, Wall heater, using a liquid fuel, has a coiled tube giving an increased heat exchange surface for a larger volume of available water requiring fewer burner actions and giving reduced exhaust emissions ,(2001)