| 摘要 |
A condensing heat exchanger comprising a combustion chamber fitted in its top section which features an opening for inserting the burner, as well as flue tubes anchored in the sieve bottoms and encased in an outer jacket, where there is a chamber to accommodate the heated liquid formed inside the jacket and the jacket is fitted with stub tubes for the supply and discharge of the heated liquid, with a condensate container featuring the condensate discharge stub tube and a stub tube for the discharge of fumes to the vent, is characterised in that the flue tubes (1) feature dents (2) formed along the length of the tube (1), and said dents (2) are pointed towards the centre of the tube (1), and said dents (2) are positioned opposite each other, and two opposite dents (2) mark out a section, where the distance between the lowest points in the dents (2) measured inside the tube (1) in the section is 1.0 mm or less, and the ratio of the length (L) of the tube (1) to the tube cross section circumference around which the combustion gases flow falls within the range from 2.5 to 6.5. |
